libzfs_dataset.c revision 290756
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 const char * 1776getprop_string(zfs_handle_t *zhp, zfs_prop_t prop, char **source) 1777{ 1778 nvlist_t *nv; 1779 const char *value; 1780 1781 *source = NULL; 1782 if (nvlist_lookup_nvlist(zhp->zfs_props, 1783 zfs_prop_to_name(prop), &nv) == 0) { 1784 value = fnvlist_lookup_string(nv, ZPROP_VALUE); 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 value = zfs_prop_default_string(prop); 1790 *source = ""; 1791 } 1792 1793 return (value); 1794} 1795 1796static boolean_t 1797zfs_is_recvd_props_mode(zfs_handle_t *zhp) 1798{ 1799 return (zhp->zfs_props == zhp->zfs_recvd_props); 1800} 1801 1802static void 1803zfs_set_recvd_props_mode(zfs_handle_t *zhp, uint64_t *cookie) 1804{ 1805 *cookie = (uint64_t)(uintptr_t)zhp->zfs_props; 1806 zhp->zfs_props = zhp->zfs_recvd_props; 1807} 1808 1809static void 1810zfs_unset_recvd_props_mode(zfs_handle_t *zhp, uint64_t *cookie) 1811{ 1812 zhp->zfs_props = (nvlist_t *)(uintptr_t)*cookie; 1813 *cookie = 0; 1814} 1815 1816/* 1817 * Internal function for getting a numeric property. Both zfs_prop_get() and 1818 * zfs_prop_get_int() are built using this interface. 1819 * 1820 * Certain properties can be overridden using 'mount -o'. In this case, scan 1821 * the contents of the /etc/mnttab entry, searching for the appropriate options. 1822 * If they differ from the on-disk values, report the current values and mark 1823 * the source "temporary". 1824 */ 1825static int 1826get_numeric_property(zfs_handle_t *zhp, zfs_prop_t prop, zprop_source_t *src, 1827 char **source, uint64_t *val) 1828{ 1829 zfs_cmd_t zc = { 0 }; 1830 nvlist_t *zplprops = NULL; 1831 struct mnttab mnt; 1832 char *mntopt_on = NULL; 1833 char *mntopt_off = NULL; 1834 boolean_t received = zfs_is_recvd_props_mode(zhp); 1835 1836 *source = NULL; 1837 1838 switch (prop) { 1839 case ZFS_PROP_ATIME: 1840 mntopt_on = MNTOPT_ATIME; 1841 mntopt_off = MNTOPT_NOATIME; 1842 break; 1843 1844 case ZFS_PROP_DEVICES: 1845 mntopt_on = MNTOPT_DEVICES; 1846 mntopt_off = MNTOPT_NODEVICES; 1847 break; 1848 1849 case ZFS_PROP_EXEC: 1850 mntopt_on = MNTOPT_EXEC; 1851 mntopt_off = MNTOPT_NOEXEC; 1852 break; 1853 1854 case ZFS_PROP_READONLY: 1855 mntopt_on = MNTOPT_RO; 1856 mntopt_off = MNTOPT_RW; 1857 break; 1858 1859 case ZFS_PROP_SETUID: 1860 mntopt_on = MNTOPT_SETUID; 1861 mntopt_off = MNTOPT_NOSETUID; 1862 break; 1863 1864 case ZFS_PROP_XATTR: 1865 mntopt_on = MNTOPT_XATTR; 1866 mntopt_off = MNTOPT_NOXATTR; 1867 break; 1868 1869 case ZFS_PROP_NBMAND: 1870 mntopt_on = MNTOPT_NBMAND; 1871 mntopt_off = MNTOPT_NONBMAND; 1872 break; 1873 } 1874 1875 /* 1876 * Because looking up the mount options is potentially expensive 1877 * (iterating over all of /etc/mnttab), we defer its calculation until 1878 * we're looking up a property which requires its presence. 1879 */ 1880 if (!zhp->zfs_mntcheck && 1881 (mntopt_on != NULL || prop == ZFS_PROP_MOUNTED)) { 1882 libzfs_handle_t *hdl = zhp->zfs_hdl; 1883 struct mnttab entry; 1884 1885 if (libzfs_mnttab_find(hdl, zhp->zfs_name, &entry) == 0) { 1886 zhp->zfs_mntopts = zfs_strdup(hdl, 1887 entry.mnt_mntopts); 1888 if (zhp->zfs_mntopts == NULL) 1889 return (-1); 1890 } 1891 1892 zhp->zfs_mntcheck = B_TRUE; 1893 } 1894 1895 if (zhp->zfs_mntopts == NULL) 1896 mnt.mnt_mntopts = ""; 1897 else 1898 mnt.mnt_mntopts = zhp->zfs_mntopts; 1899 1900 switch (prop) { 1901 case ZFS_PROP_ATIME: 1902 case ZFS_PROP_DEVICES: 1903 case ZFS_PROP_EXEC: 1904 case ZFS_PROP_READONLY: 1905 case ZFS_PROP_SETUID: 1906 case ZFS_PROP_XATTR: 1907 case ZFS_PROP_NBMAND: 1908 *val = getprop_uint64(zhp, prop, source); 1909 1910 if (received) 1911 break; 1912 1913 if (hasmntopt(&mnt, mntopt_on) && !*val) { 1914 *val = B_TRUE; 1915 if (src) 1916 *src = ZPROP_SRC_TEMPORARY; 1917 } else if (hasmntopt(&mnt, mntopt_off) && *val) { 1918 *val = B_FALSE; 1919 if (src) 1920 *src = ZPROP_SRC_TEMPORARY; 1921 } 1922 break; 1923 1924 case ZFS_PROP_CANMOUNT: 1925 case ZFS_PROP_VOLSIZE: 1926 case ZFS_PROP_QUOTA: 1927 case ZFS_PROP_REFQUOTA: 1928 case ZFS_PROP_RESERVATION: 1929 case ZFS_PROP_REFRESERVATION: 1930 case ZFS_PROP_FILESYSTEM_LIMIT: 1931 case ZFS_PROP_SNAPSHOT_LIMIT: 1932 case ZFS_PROP_FILESYSTEM_COUNT: 1933 case ZFS_PROP_SNAPSHOT_COUNT: 1934 *val = getprop_uint64(zhp, prop, source); 1935 1936 if (*source == NULL) { 1937 /* not default, must be local */ 1938 *source = zhp->zfs_name; 1939 } 1940 break; 1941 1942 case ZFS_PROP_MOUNTED: 1943 *val = (zhp->zfs_mntopts != NULL); 1944 break; 1945 1946 case ZFS_PROP_NUMCLONES: 1947 *val = zhp->zfs_dmustats.dds_num_clones; 1948 break; 1949 1950 case ZFS_PROP_VERSION: 1951 case ZFS_PROP_NORMALIZE: 1952 case ZFS_PROP_UTF8ONLY: 1953 case ZFS_PROP_CASE: 1954 if (!zfs_prop_valid_for_type(prop, zhp->zfs_head_type) || 1955 zcmd_alloc_dst_nvlist(zhp->zfs_hdl, &zc, 0) != 0) 1956 return (-1); 1957 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 1958 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_OBJSET_ZPLPROPS, &zc)) { 1959 zcmd_free_nvlists(&zc); 1960 return (-1); 1961 } 1962 if (zcmd_read_dst_nvlist(zhp->zfs_hdl, &zc, &zplprops) != 0 || 1963 nvlist_lookup_uint64(zplprops, zfs_prop_to_name(prop), 1964 val) != 0) { 1965 zcmd_free_nvlists(&zc); 1966 return (-1); 1967 } 1968 if (zplprops) 1969 nvlist_free(zplprops); 1970 zcmd_free_nvlists(&zc); 1971 break; 1972 1973 case ZFS_PROP_INCONSISTENT: 1974 *val = zhp->zfs_dmustats.dds_inconsistent; 1975 break; 1976 1977 default: 1978 switch (zfs_prop_get_type(prop)) { 1979 case PROP_TYPE_NUMBER: 1980 case PROP_TYPE_INDEX: 1981 *val = getprop_uint64(zhp, prop, source); 1982 /* 1983 * If we tried to use a default value for a 1984 * readonly property, it means that it was not 1985 * present. 1986 */ 1987 if (zfs_prop_readonly(prop) && 1988 *source != NULL && (*source)[0] == '\0') { 1989 *source = NULL; 1990 } 1991 break; 1992 1993 case PROP_TYPE_STRING: 1994 default: 1995 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN, 1996 "cannot get non-numeric property")); 1997 return (zfs_error(zhp->zfs_hdl, EZFS_BADPROP, 1998 dgettext(TEXT_DOMAIN, "internal error"))); 1999 } 2000 } 2001 2002 return (0); 2003} 2004 2005/* 2006 * Calculate the source type, given the raw source string. 2007 */ 2008static void 2009get_source(zfs_handle_t *zhp, zprop_source_t *srctype, char *source, 2010 char *statbuf, size_t statlen) 2011{ 2012 if (statbuf == NULL || *srctype == ZPROP_SRC_TEMPORARY) 2013 return; 2014 2015 if (source == NULL) { 2016 *srctype = ZPROP_SRC_NONE; 2017 } else if (source[0] == '\0') { 2018 *srctype = ZPROP_SRC_DEFAULT; 2019 } else if (strstr(source, ZPROP_SOURCE_VAL_RECVD) != NULL) { 2020 *srctype = ZPROP_SRC_RECEIVED; 2021 } else { 2022 if (strcmp(source, zhp->zfs_name) == 0) { 2023 *srctype = ZPROP_SRC_LOCAL; 2024 } else { 2025 (void) strlcpy(statbuf, source, statlen); 2026 *srctype = ZPROP_SRC_INHERITED; 2027 } 2028 } 2029 2030} 2031 2032int 2033zfs_prop_get_recvd(zfs_handle_t *zhp, const char *propname, char *propbuf, 2034 size_t proplen, boolean_t literal) 2035{ 2036 zfs_prop_t prop; 2037 int err = 0; 2038 2039 if (zhp->zfs_recvd_props == NULL) 2040 if (get_recvd_props_ioctl(zhp) != 0) 2041 return (-1); 2042 2043 prop = zfs_name_to_prop(propname); 2044 2045 if (prop != ZPROP_INVAL) { 2046 uint64_t cookie; 2047 if (!nvlist_exists(zhp->zfs_recvd_props, propname)) 2048 return (-1); 2049 zfs_set_recvd_props_mode(zhp, &cookie); 2050 err = zfs_prop_get(zhp, prop, propbuf, proplen, 2051 NULL, NULL, 0, literal); 2052 zfs_unset_recvd_props_mode(zhp, &cookie); 2053 } else { 2054 nvlist_t *propval; 2055 char *recvdval; 2056 if (nvlist_lookup_nvlist(zhp->zfs_recvd_props, 2057 propname, &propval) != 0) 2058 return (-1); 2059 verify(nvlist_lookup_string(propval, ZPROP_VALUE, 2060 &recvdval) == 0); 2061 (void) strlcpy(propbuf, recvdval, proplen); 2062 } 2063 2064 return (err == 0 ? 0 : -1); 2065} 2066 2067static int 2068get_clones_string(zfs_handle_t *zhp, char *propbuf, size_t proplen) 2069{ 2070 nvlist_t *value; 2071 nvpair_t *pair; 2072 2073 value = zfs_get_clones_nvl(zhp); 2074 if (value == NULL) 2075 return (-1); 2076 2077 propbuf[0] = '\0'; 2078 for (pair = nvlist_next_nvpair(value, NULL); pair != NULL; 2079 pair = nvlist_next_nvpair(value, pair)) { 2080 if (propbuf[0] != '\0') 2081 (void) strlcat(propbuf, ",", proplen); 2082 (void) strlcat(propbuf, nvpair_name(pair), proplen); 2083 } 2084 2085 return (0); 2086} 2087 2088struct get_clones_arg { 2089 uint64_t numclones; 2090 nvlist_t *value; 2091 const char *origin; 2092 char buf[ZFS_MAXNAMELEN]; 2093}; 2094 2095int 2096get_clones_cb(zfs_handle_t *zhp, void *arg) 2097{ 2098 struct get_clones_arg *gca = arg; 2099 2100 if (gca->numclones == 0) { 2101 zfs_close(zhp); 2102 return (0); 2103 } 2104 2105 if (zfs_prop_get(zhp, ZFS_PROP_ORIGIN, gca->buf, sizeof (gca->buf), 2106 NULL, NULL, 0, B_TRUE) != 0) 2107 goto out; 2108 if (strcmp(gca->buf, gca->origin) == 0) { 2109 fnvlist_add_boolean(gca->value, zfs_get_name(zhp)); 2110 gca->numclones--; 2111 } 2112 2113out: 2114 (void) zfs_iter_children(zhp, get_clones_cb, gca); 2115 zfs_close(zhp); 2116 return (0); 2117} 2118 2119nvlist_t * 2120zfs_get_clones_nvl(zfs_handle_t *zhp) 2121{ 2122 nvlist_t *nv, *value; 2123 2124 if (nvlist_lookup_nvlist(zhp->zfs_props, 2125 zfs_prop_to_name(ZFS_PROP_CLONES), &nv) != 0) { 2126 struct get_clones_arg gca; 2127 2128 /* 2129 * if this is a snapshot, then the kernel wasn't able 2130 * to get the clones. Do it by slowly iterating. 2131 */ 2132 if (zhp->zfs_type != ZFS_TYPE_SNAPSHOT) 2133 return (NULL); 2134 if (nvlist_alloc(&nv, NV_UNIQUE_NAME, 0) != 0) 2135 return (NULL); 2136 if (nvlist_alloc(&value, NV_UNIQUE_NAME, 0) != 0) { 2137 nvlist_free(nv); 2138 return (NULL); 2139 } 2140 2141 gca.numclones = zfs_prop_get_int(zhp, ZFS_PROP_NUMCLONES); 2142 gca.value = value; 2143 gca.origin = zhp->zfs_name; 2144 2145 if (gca.numclones != 0) { 2146 zfs_handle_t *root; 2147 char pool[ZFS_MAXNAMELEN]; 2148 char *cp = pool; 2149 2150 /* get the pool name */ 2151 (void) strlcpy(pool, zhp->zfs_name, sizeof (pool)); 2152 (void) strsep(&cp, "/@"); 2153 root = zfs_open(zhp->zfs_hdl, pool, 2154 ZFS_TYPE_FILESYSTEM); 2155 2156 (void) get_clones_cb(root, &gca); 2157 } 2158 2159 if (gca.numclones != 0 || 2160 nvlist_add_nvlist(nv, ZPROP_VALUE, value) != 0 || 2161 nvlist_add_nvlist(zhp->zfs_props, 2162 zfs_prop_to_name(ZFS_PROP_CLONES), nv) != 0) { 2163 nvlist_free(nv); 2164 nvlist_free(value); 2165 return (NULL); 2166 } 2167 nvlist_free(nv); 2168 nvlist_free(value); 2169 verify(0 == nvlist_lookup_nvlist(zhp->zfs_props, 2170 zfs_prop_to_name(ZFS_PROP_CLONES), &nv)); 2171 } 2172 2173 verify(nvlist_lookup_nvlist(nv, ZPROP_VALUE, &value) == 0); 2174 2175 return (value); 2176} 2177 2178/* 2179 * Retrieve a property from the given object. If 'literal' is specified, then 2180 * numbers are left as exact values. Otherwise, numbers are converted to a 2181 * human-readable form. 2182 * 2183 * Returns 0 on success, or -1 on error. 2184 */ 2185int 2186zfs_prop_get(zfs_handle_t *zhp, zfs_prop_t prop, char *propbuf, size_t proplen, 2187 zprop_source_t *src, char *statbuf, size_t statlen, boolean_t literal) 2188{ 2189 char *source = NULL; 2190 uint64_t val; 2191 const char *str; 2192 const char *strval; 2193 boolean_t received = zfs_is_recvd_props_mode(zhp); 2194 2195 /* 2196 * Check to see if this property applies to our object 2197 */ 2198 if (!zfs_prop_valid_for_type(prop, zhp->zfs_type)) 2199 return (-1); 2200 2201 if (received && zfs_prop_readonly(prop)) 2202 return (-1); 2203 2204 if (src) 2205 *src = ZPROP_SRC_NONE; 2206 2207 switch (prop) { 2208 case ZFS_PROP_CREATION: 2209 /* 2210 * 'creation' is a time_t stored in the statistics. We convert 2211 * this into a string unless 'literal' is specified. 2212 */ 2213 { 2214 val = getprop_uint64(zhp, prop, &source); 2215 time_t time = (time_t)val; 2216 struct tm t; 2217 2218 if (literal || 2219 localtime_r(&time, &t) == NULL || 2220 strftime(propbuf, proplen, "%a %b %e %k:%M %Y", 2221 &t) == 0) 2222 (void) snprintf(propbuf, proplen, "%llu", val); 2223 } 2224 break; 2225 2226 case ZFS_PROP_MOUNTPOINT: 2227 /* 2228 * Getting the precise mountpoint can be tricky. 2229 * 2230 * - for 'none' or 'legacy', return those values. 2231 * - for inherited mountpoints, we want to take everything 2232 * after our ancestor and append it to the inherited value. 2233 * 2234 * If the pool has an alternate root, we want to prepend that 2235 * root to any values we return. 2236 */ 2237 2238 str = getprop_string(zhp, prop, &source); 2239 2240 if (str[0] == '/') { 2241 char buf[MAXPATHLEN]; 2242 char *root = buf; 2243 const char *relpath; 2244 2245 /* 2246 * If we inherit the mountpoint, even from a dataset 2247 * with a received value, the source will be the path of 2248 * the dataset we inherit from. If source is 2249 * ZPROP_SOURCE_VAL_RECVD, the received value is not 2250 * inherited. 2251 */ 2252 if (strcmp(source, ZPROP_SOURCE_VAL_RECVD) == 0) { 2253 relpath = ""; 2254 } else { 2255 relpath = zhp->zfs_name + strlen(source); 2256 if (relpath[0] == '/') 2257 relpath++; 2258 } 2259 2260 if ((zpool_get_prop(zhp->zpool_hdl, 2261 ZPOOL_PROP_ALTROOT, buf, MAXPATHLEN, NULL, 2262 B_FALSE)) || (strcmp(root, "-") == 0)) 2263 root[0] = '\0'; 2264 /* 2265 * Special case an alternate root of '/'. This will 2266 * avoid having multiple leading slashes in the 2267 * mountpoint path. 2268 */ 2269 if (strcmp(root, "/") == 0) 2270 root++; 2271 2272 /* 2273 * If the mountpoint is '/' then skip over this 2274 * if we are obtaining either an alternate root or 2275 * an inherited mountpoint. 2276 */ 2277 if (str[1] == '\0' && (root[0] != '\0' || 2278 relpath[0] != '\0')) 2279 str++; 2280 2281 if (relpath[0] == '\0') 2282 (void) snprintf(propbuf, proplen, "%s%s", 2283 root, str); 2284 else 2285 (void) snprintf(propbuf, proplen, "%s%s%s%s", 2286 root, str, relpath[0] == '@' ? "" : "/", 2287 relpath); 2288 } else { 2289 /* 'legacy' or 'none' */ 2290 (void) strlcpy(propbuf, str, proplen); 2291 } 2292 2293 break; 2294 2295 case ZFS_PROP_ORIGIN: 2296 str = getprop_string(zhp, prop, &source); 2297 if (str == NULL) 2298 return (-1); 2299 (void) strlcpy(propbuf, str, proplen); 2300 break; 2301 2302 case ZFS_PROP_CLONES: 2303 if (get_clones_string(zhp, propbuf, proplen) != 0) 2304 return (-1); 2305 break; 2306 2307 case ZFS_PROP_QUOTA: 2308 case ZFS_PROP_REFQUOTA: 2309 case ZFS_PROP_RESERVATION: 2310 case ZFS_PROP_REFRESERVATION: 2311 2312 if (get_numeric_property(zhp, prop, src, &source, &val) != 0) 2313 return (-1); 2314 2315 /* 2316 * If quota or reservation is 0, we translate this into 'none' 2317 * (unless literal is set), and indicate that it's the default 2318 * value. Otherwise, we print the number nicely and indicate 2319 * that its set locally. 2320 */ 2321 if (val == 0) { 2322 if (literal) 2323 (void) strlcpy(propbuf, "0", proplen); 2324 else 2325 (void) strlcpy(propbuf, "none", proplen); 2326 } else { 2327 if (literal) 2328 (void) snprintf(propbuf, proplen, "%llu", 2329 (u_longlong_t)val); 2330 else 2331 zfs_nicenum(val, propbuf, proplen); 2332 } 2333 break; 2334 2335 case ZFS_PROP_FILESYSTEM_LIMIT: 2336 case ZFS_PROP_SNAPSHOT_LIMIT: 2337 case ZFS_PROP_FILESYSTEM_COUNT: 2338 case ZFS_PROP_SNAPSHOT_COUNT: 2339 2340 if (get_numeric_property(zhp, prop, src, &source, &val) != 0) 2341 return (-1); 2342 2343 /* 2344 * If limit is UINT64_MAX, we translate this into 'none' (unless 2345 * literal is set), and indicate that it's the default value. 2346 * Otherwise, we print the number nicely and indicate that it's 2347 * set locally. 2348 */ 2349 if (literal) { 2350 (void) snprintf(propbuf, proplen, "%llu", 2351 (u_longlong_t)val); 2352 } else if (val == UINT64_MAX) { 2353 (void) strlcpy(propbuf, "none", proplen); 2354 } else { 2355 zfs_nicenum(val, propbuf, proplen); 2356 } 2357 break; 2358 2359 case ZFS_PROP_REFRATIO: 2360 case ZFS_PROP_COMPRESSRATIO: 2361 if (get_numeric_property(zhp, prop, src, &source, &val) != 0) 2362 return (-1); 2363 (void) snprintf(propbuf, proplen, "%llu.%02llux", 2364 (u_longlong_t)(val / 100), 2365 (u_longlong_t)(val % 100)); 2366 break; 2367 2368 case ZFS_PROP_TYPE: 2369 switch (zhp->zfs_type) { 2370 case ZFS_TYPE_FILESYSTEM: 2371 str = "filesystem"; 2372 break; 2373 case ZFS_TYPE_VOLUME: 2374 str = "volume"; 2375 break; 2376 case ZFS_TYPE_SNAPSHOT: 2377 str = "snapshot"; 2378 break; 2379 case ZFS_TYPE_BOOKMARK: 2380 str = "bookmark"; 2381 break; 2382 default: 2383 abort(); 2384 } 2385 (void) snprintf(propbuf, proplen, "%s", str); 2386 break; 2387 2388 case ZFS_PROP_MOUNTED: 2389 /* 2390 * The 'mounted' property is a pseudo-property that described 2391 * whether the filesystem is currently mounted. Even though 2392 * it's a boolean value, the typical values of "on" and "off" 2393 * don't make sense, so we translate to "yes" and "no". 2394 */ 2395 if (get_numeric_property(zhp, ZFS_PROP_MOUNTED, 2396 src, &source, &val) != 0) 2397 return (-1); 2398 if (val) 2399 (void) strlcpy(propbuf, "yes", proplen); 2400 else 2401 (void) strlcpy(propbuf, "no", proplen); 2402 break; 2403 2404 case ZFS_PROP_NAME: 2405 /* 2406 * The 'name' property is a pseudo-property derived from the 2407 * dataset name. It is presented as a real property to simplify 2408 * consumers. 2409 */ 2410 (void) strlcpy(propbuf, zhp->zfs_name, proplen); 2411 break; 2412 2413 case ZFS_PROP_MLSLABEL: 2414 { 2415#ifdef sun 2416 m_label_t *new_sl = NULL; 2417 char *ascii = NULL; /* human readable label */ 2418 2419 (void) strlcpy(propbuf, 2420 getprop_string(zhp, prop, &source), proplen); 2421 2422 if (literal || (strcasecmp(propbuf, 2423 ZFS_MLSLABEL_DEFAULT) == 0)) 2424 break; 2425 2426 /* 2427 * Try to translate the internal hex string to 2428 * human-readable output. If there are any 2429 * problems just use the hex string. 2430 */ 2431 2432 if (str_to_label(propbuf, &new_sl, MAC_LABEL, 2433 L_NO_CORRECTION, NULL) == -1) { 2434 m_label_free(new_sl); 2435 break; 2436 } 2437 2438 if (label_to_str(new_sl, &ascii, M_LABEL, 2439 DEF_NAMES) != 0) { 2440 if (ascii) 2441 free(ascii); 2442 m_label_free(new_sl); 2443 break; 2444 } 2445 m_label_free(new_sl); 2446 2447 (void) strlcpy(propbuf, ascii, proplen); 2448 free(ascii); 2449#else /* !sun */ 2450 propbuf[0] = '\0'; 2451#endif /* !sun */ 2452 } 2453 break; 2454 2455 case ZFS_PROP_GUID: 2456 /* 2457 * GUIDs are stored as numbers, but they are identifiers. 2458 * We don't want them to be pretty printed, because pretty 2459 * printing mangles the ID into a truncated and useless value. 2460 */ 2461 if (get_numeric_property(zhp, prop, src, &source, &val) != 0) 2462 return (-1); 2463 (void) snprintf(propbuf, proplen, "%llu", (u_longlong_t)val); 2464 break; 2465 2466 default: 2467 switch (zfs_prop_get_type(prop)) { 2468 case PROP_TYPE_NUMBER: 2469 if (get_numeric_property(zhp, prop, src, 2470 &source, &val) != 0) 2471 return (-1); 2472 if (literal) 2473 (void) snprintf(propbuf, proplen, "%llu", 2474 (u_longlong_t)val); 2475 else 2476 zfs_nicenum(val, propbuf, proplen); 2477 break; 2478 2479 case PROP_TYPE_STRING: 2480 str = getprop_string(zhp, prop, &source); 2481 if (str == NULL) 2482 return (-1); 2483 (void) strlcpy(propbuf, str, proplen); 2484 break; 2485 2486 case PROP_TYPE_INDEX: 2487 if (get_numeric_property(zhp, prop, src, 2488 &source, &val) != 0) 2489 return (-1); 2490 if (zfs_prop_index_to_string(prop, val, &strval) != 0) 2491 return (-1); 2492 (void) strlcpy(propbuf, strval, proplen); 2493 break; 2494 2495 default: 2496 abort(); 2497 } 2498 } 2499 2500 get_source(zhp, src, source, statbuf, statlen); 2501 2502 return (0); 2503} 2504 2505/* 2506 * Utility function to get the given numeric property. Does no validation that 2507 * the given property is the appropriate type; should only be used with 2508 * hard-coded property types. 2509 */ 2510uint64_t 2511zfs_prop_get_int(zfs_handle_t *zhp, zfs_prop_t prop) 2512{ 2513 char *source; 2514 uint64_t val; 2515 2516 (void) get_numeric_property(zhp, prop, NULL, &source, &val); 2517 2518 return (val); 2519} 2520 2521int 2522zfs_prop_set_int(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t val) 2523{ 2524 char buf[64]; 2525 2526 (void) snprintf(buf, sizeof (buf), "%llu", (longlong_t)val); 2527 return (zfs_prop_set(zhp, zfs_prop_to_name(prop), buf)); 2528} 2529 2530/* 2531 * Similar to zfs_prop_get(), but returns the value as an integer. 2532 */ 2533int 2534zfs_prop_get_numeric(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t *value, 2535 zprop_source_t *src, char *statbuf, size_t statlen) 2536{ 2537 char *source; 2538 2539 /* 2540 * Check to see if this property applies to our object 2541 */ 2542 if (!zfs_prop_valid_for_type(prop, zhp->zfs_type)) { 2543 return (zfs_error_fmt(zhp->zfs_hdl, EZFS_PROPTYPE, 2544 dgettext(TEXT_DOMAIN, "cannot get property '%s'"), 2545 zfs_prop_to_name(prop))); 2546 } 2547 2548 if (src) 2549 *src = ZPROP_SRC_NONE; 2550 2551 if (get_numeric_property(zhp, prop, src, &source, value) != 0) 2552 return (-1); 2553 2554 get_source(zhp, src, source, statbuf, statlen); 2555 2556 return (0); 2557} 2558 2559static int 2560idmap_id_to_numeric_domain_rid(uid_t id, boolean_t isuser, 2561 char **domainp, idmap_rid_t *ridp) 2562{ 2563#ifdef sun 2564 idmap_get_handle_t *get_hdl = NULL; 2565 idmap_stat status; 2566 int err = EINVAL; 2567 2568 if (idmap_get_create(&get_hdl) != IDMAP_SUCCESS) 2569 goto out; 2570 2571 if (isuser) { 2572 err = idmap_get_sidbyuid(get_hdl, id, 2573 IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status); 2574 } else { 2575 err = idmap_get_sidbygid(get_hdl, id, 2576 IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status); 2577 } 2578 if (err == IDMAP_SUCCESS && 2579 idmap_get_mappings(get_hdl) == IDMAP_SUCCESS && 2580 status == IDMAP_SUCCESS) 2581 err = 0; 2582 else 2583 err = EINVAL; 2584out: 2585 if (get_hdl) 2586 idmap_get_destroy(get_hdl); 2587 return (err); 2588#else /* !sun */ 2589 assert(!"invalid code path"); 2590 return (EINVAL); // silence compiler warning 2591#endif /* !sun */ 2592} 2593 2594/* 2595 * convert the propname into parameters needed by kernel 2596 * Eg: userquota@ahrens -> ZFS_PROP_USERQUOTA, "", 126829 2597 * Eg: userused@matt@domain -> ZFS_PROP_USERUSED, "S-1-123-456", 789 2598 */ 2599static int 2600userquota_propname_decode(const char *propname, boolean_t zoned, 2601 zfs_userquota_prop_t *typep, char *domain, int domainlen, uint64_t *ridp) 2602{ 2603 zfs_userquota_prop_t type; 2604 char *cp, *end; 2605 char *numericsid = NULL; 2606 boolean_t isuser; 2607 2608 domain[0] = '\0'; 2609 *ridp = 0; 2610 /* Figure out the property type ({user|group}{quota|space}) */ 2611 for (type = 0; type < ZFS_NUM_USERQUOTA_PROPS; type++) { 2612 if (strncmp(propname, zfs_userquota_prop_prefixes[type], 2613 strlen(zfs_userquota_prop_prefixes[type])) == 0) 2614 break; 2615 } 2616 if (type == ZFS_NUM_USERQUOTA_PROPS) 2617 return (EINVAL); 2618 *typep = type; 2619 2620 isuser = (type == ZFS_PROP_USERQUOTA || 2621 type == ZFS_PROP_USERUSED); 2622 2623 cp = strchr(propname, '@') + 1; 2624 2625 if (strchr(cp, '@')) { 2626#ifdef sun 2627 /* 2628 * It's a SID name (eg "user@domain") that needs to be 2629 * turned into S-1-domainID-RID. 2630 */ 2631 int flag = 0; 2632 idmap_stat stat, map_stat; 2633 uid_t pid; 2634 idmap_rid_t rid; 2635 idmap_get_handle_t *gh = NULL; 2636 2637 stat = idmap_get_create(&gh); 2638 if (stat != IDMAP_SUCCESS) { 2639 idmap_get_destroy(gh); 2640 return (ENOMEM); 2641 } 2642 if (zoned && getzoneid() == GLOBAL_ZONEID) 2643 return (ENOENT); 2644 if (isuser) { 2645 stat = idmap_getuidbywinname(cp, NULL, flag, &pid); 2646 if (stat < 0) 2647 return (ENOENT); 2648 stat = idmap_get_sidbyuid(gh, pid, flag, &numericsid, 2649 &rid, &map_stat); 2650 } else { 2651 stat = idmap_getgidbywinname(cp, NULL, flag, &pid); 2652 if (stat < 0) 2653 return (ENOENT); 2654 stat = idmap_get_sidbygid(gh, pid, flag, &numericsid, 2655 &rid, &map_stat); 2656 } 2657 if (stat < 0) { 2658 idmap_get_destroy(gh); 2659 return (ENOENT); 2660 } 2661 stat = idmap_get_mappings(gh); 2662 idmap_get_destroy(gh); 2663 2664 if (stat < 0) { 2665 return (ENOENT); 2666 } 2667 if (numericsid == NULL) 2668 return (ENOENT); 2669 cp = numericsid; 2670 *ridp = rid; 2671 /* will be further decoded below */ 2672#else /* !sun */ 2673 return (ENOENT); 2674#endif /* !sun */ 2675 } 2676 2677 if (strncmp(cp, "S-1-", 4) == 0) { 2678 /* It's a numeric SID (eg "S-1-234-567-89") */ 2679 (void) strlcpy(domain, cp, domainlen); 2680 errno = 0; 2681 if (*ridp == 0) { 2682 cp = strrchr(domain, '-'); 2683 *cp = '\0'; 2684 cp++; 2685 *ridp = strtoull(cp, &end, 10); 2686 } else { 2687 end = ""; 2688 } 2689 if (numericsid) { 2690 free(numericsid); 2691 numericsid = NULL; 2692 } 2693 if (errno != 0 || *end != '\0') 2694 return (EINVAL); 2695 } else if (!isdigit(*cp)) { 2696 /* 2697 * It's a user/group name (eg "user") that needs to be 2698 * turned into a uid/gid 2699 */ 2700 if (zoned && getzoneid() == GLOBAL_ZONEID) 2701 return (ENOENT); 2702 if (isuser) { 2703 struct passwd *pw; 2704 pw = getpwnam(cp); 2705 if (pw == NULL) 2706 return (ENOENT); 2707 *ridp = pw->pw_uid; 2708 } else { 2709 struct group *gr; 2710 gr = getgrnam(cp); 2711 if (gr == NULL) 2712 return (ENOENT); 2713 *ridp = gr->gr_gid; 2714 } 2715 } else { 2716 /* It's a user/group ID (eg "12345"). */ 2717 uid_t id = strtoul(cp, &end, 10); 2718 idmap_rid_t rid; 2719 char *mapdomain; 2720 2721 if (*end != '\0') 2722 return (EINVAL); 2723 if (id > MAXUID) { 2724 /* It's an ephemeral ID. */ 2725 if (idmap_id_to_numeric_domain_rid(id, isuser, 2726 &mapdomain, &rid) != 0) 2727 return (ENOENT); 2728 (void) strlcpy(domain, mapdomain, domainlen); 2729 *ridp = rid; 2730 } else { 2731 *ridp = id; 2732 } 2733 } 2734 2735 ASSERT3P(numericsid, ==, NULL); 2736 return (0); 2737} 2738 2739static int 2740zfs_prop_get_userquota_common(zfs_handle_t *zhp, const char *propname, 2741 uint64_t *propvalue, zfs_userquota_prop_t *typep) 2742{ 2743 int err; 2744 zfs_cmd_t zc = { 0 }; 2745 2746 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 2747 2748 err = userquota_propname_decode(propname, 2749 zfs_prop_get_int(zhp, ZFS_PROP_ZONED), 2750 typep, zc.zc_value, sizeof (zc.zc_value), &zc.zc_guid); 2751 zc.zc_objset_type = *typep; 2752 if (err) 2753 return (err); 2754 2755 err = ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_USERSPACE_ONE, &zc); 2756 if (err) 2757 return (err); 2758 2759 *propvalue = zc.zc_cookie; 2760 return (0); 2761} 2762 2763int 2764zfs_prop_get_userquota_int(zfs_handle_t *zhp, const char *propname, 2765 uint64_t *propvalue) 2766{ 2767 zfs_userquota_prop_t type; 2768 2769 return (zfs_prop_get_userquota_common(zhp, propname, propvalue, 2770 &type)); 2771} 2772 2773int 2774zfs_prop_get_userquota(zfs_handle_t *zhp, const char *propname, 2775 char *propbuf, int proplen, boolean_t literal) 2776{ 2777 int err; 2778 uint64_t propvalue; 2779 zfs_userquota_prop_t type; 2780 2781 err = zfs_prop_get_userquota_common(zhp, propname, &propvalue, 2782 &type); 2783 2784 if (err) 2785 return (err); 2786 2787 if (literal) { 2788 (void) snprintf(propbuf, proplen, "%llu", propvalue); 2789 } else if (propvalue == 0 && 2790 (type == ZFS_PROP_USERQUOTA || type == ZFS_PROP_GROUPQUOTA)) { 2791 (void) strlcpy(propbuf, "none", proplen); 2792 } else { 2793 zfs_nicenum(propvalue, propbuf, proplen); 2794 } 2795 return (0); 2796} 2797 2798int 2799zfs_prop_get_written_int(zfs_handle_t *zhp, const char *propname, 2800 uint64_t *propvalue) 2801{ 2802 int err; 2803 zfs_cmd_t zc = { 0 }; 2804 const char *snapname; 2805 2806 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 2807 2808 snapname = strchr(propname, '@') + 1; 2809 if (strchr(snapname, '@')) { 2810 (void) strlcpy(zc.zc_value, snapname, sizeof (zc.zc_value)); 2811 } else { 2812 /* snapname is the short name, append it to zhp's fsname */ 2813 char *cp; 2814 2815 (void) strlcpy(zc.zc_value, zhp->zfs_name, 2816 sizeof (zc.zc_value)); 2817 cp = strchr(zc.zc_value, '@'); 2818 if (cp != NULL) 2819 *cp = '\0'; 2820 (void) strlcat(zc.zc_value, "@", sizeof (zc.zc_value)); 2821 (void) strlcat(zc.zc_value, snapname, sizeof (zc.zc_value)); 2822 } 2823 2824 err = ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_SPACE_WRITTEN, &zc); 2825 if (err) 2826 return (err); 2827 2828 *propvalue = zc.zc_cookie; 2829 return (0); 2830} 2831 2832int 2833zfs_prop_get_written(zfs_handle_t *zhp, const char *propname, 2834 char *propbuf, int proplen, boolean_t literal) 2835{ 2836 int err; 2837 uint64_t propvalue; 2838 2839 err = zfs_prop_get_written_int(zhp, propname, &propvalue); 2840 2841 if (err) 2842 return (err); 2843 2844 if (literal) { 2845 (void) snprintf(propbuf, proplen, "%llu", propvalue); 2846 } else { 2847 zfs_nicenum(propvalue, propbuf, proplen); 2848 } 2849 return (0); 2850} 2851 2852/* 2853 * Returns the name of the given zfs handle. 2854 */ 2855const char * 2856zfs_get_name(const zfs_handle_t *zhp) 2857{ 2858 return (zhp->zfs_name); 2859} 2860 2861/* 2862 * Returns the type of the given zfs handle. 2863 */ 2864zfs_type_t 2865zfs_get_type(const zfs_handle_t *zhp) 2866{ 2867 return (zhp->zfs_type); 2868} 2869 2870/* 2871 * Is one dataset name a child dataset of another? 2872 * 2873 * Needs to handle these cases: 2874 * Dataset 1 "a/foo" "a/foo" "a/foo" "a/foo" 2875 * Dataset 2 "a/fo" "a/foobar" "a/bar/baz" "a/foo/bar" 2876 * Descendant? No. No. No. Yes. 2877 */ 2878static boolean_t 2879is_descendant(const char *ds1, const char *ds2) 2880{ 2881 size_t d1len = strlen(ds1); 2882 2883 /* ds2 can't be a descendant if it's smaller */ 2884 if (strlen(ds2) < d1len) 2885 return (B_FALSE); 2886 2887 /* otherwise, compare strings and verify that there's a '/' char */ 2888 return (ds2[d1len] == '/' && (strncmp(ds1, ds2, d1len) == 0)); 2889} 2890 2891/* 2892 * Given a complete name, return just the portion that refers to the parent. 2893 * Will return -1 if there is no parent (path is just the name of the 2894 * pool). 2895 */ 2896static int 2897parent_name(const char *path, char *buf, size_t buflen) 2898{ 2899 char *slashp; 2900 2901 (void) strlcpy(buf, path, buflen); 2902 2903 if ((slashp = strrchr(buf, '/')) == NULL) 2904 return (-1); 2905 *slashp = '\0'; 2906 2907 return (0); 2908} 2909 2910/* 2911 * If accept_ancestor is false, then check to make sure that the given path has 2912 * a parent, and that it exists. If accept_ancestor is true, then find the 2913 * closest existing ancestor for the given path. In prefixlen return the 2914 * length of already existing prefix of the given path. We also fetch the 2915 * 'zoned' property, which is used to validate property settings when creating 2916 * new datasets. 2917 */ 2918static int 2919check_parents(libzfs_handle_t *hdl, const char *path, uint64_t *zoned, 2920 boolean_t accept_ancestor, int *prefixlen) 2921{ 2922 zfs_cmd_t zc = { 0 }; 2923 char parent[ZFS_MAXNAMELEN]; 2924 char *slash; 2925 zfs_handle_t *zhp; 2926 char errbuf[1024]; 2927 uint64_t is_zoned; 2928 2929 (void) snprintf(errbuf, sizeof (errbuf), 2930 dgettext(TEXT_DOMAIN, "cannot create '%s'"), path); 2931 2932 /* get parent, and check to see if this is just a pool */ 2933 if (parent_name(path, parent, sizeof (parent)) != 0) { 2934 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 2935 "missing dataset name")); 2936 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 2937 } 2938 2939 /* check to see if the pool exists */ 2940 if ((slash = strchr(parent, '/')) == NULL) 2941 slash = parent + strlen(parent); 2942 (void) strncpy(zc.zc_name, parent, slash - parent); 2943 zc.zc_name[slash - parent] = '\0'; 2944 if (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_STATS, &zc) != 0 && 2945 errno == ENOENT) { 2946 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 2947 "no such pool '%s'"), zc.zc_name); 2948 return (zfs_error(hdl, EZFS_NOENT, errbuf)); 2949 } 2950 2951 /* check to see if the parent dataset exists */ 2952 while ((zhp = make_dataset_handle(hdl, parent)) == NULL) { 2953 if (errno == ENOENT && accept_ancestor) { 2954 /* 2955 * Go deeper to find an ancestor, give up on top level. 2956 */ 2957 if (parent_name(parent, parent, sizeof (parent)) != 0) { 2958 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 2959 "no such pool '%s'"), zc.zc_name); 2960 return (zfs_error(hdl, EZFS_NOENT, errbuf)); 2961 } 2962 } else if (errno == ENOENT) { 2963 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 2964 "parent does not exist")); 2965 return (zfs_error(hdl, EZFS_NOENT, errbuf)); 2966 } else 2967 return (zfs_standard_error(hdl, errno, errbuf)); 2968 } 2969 2970 is_zoned = zfs_prop_get_int(zhp, ZFS_PROP_ZONED); 2971 if (zoned != NULL) 2972 *zoned = is_zoned; 2973 2974 /* we are in a non-global zone, but parent is in the global zone */ 2975 if (getzoneid() != GLOBAL_ZONEID && !is_zoned) { 2976 (void) zfs_standard_error(hdl, EPERM, errbuf); 2977 zfs_close(zhp); 2978 return (-1); 2979 } 2980 2981 /* make sure parent is a filesystem */ 2982 if (zfs_get_type(zhp) != ZFS_TYPE_FILESYSTEM) { 2983 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 2984 "parent is not a filesystem")); 2985 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf); 2986 zfs_close(zhp); 2987 return (-1); 2988 } 2989 2990 zfs_close(zhp); 2991 if (prefixlen != NULL) 2992 *prefixlen = strlen(parent); 2993 return (0); 2994} 2995 2996/* 2997 * Finds whether the dataset of the given type(s) exists. 2998 */ 2999boolean_t 3000zfs_dataset_exists(libzfs_handle_t *hdl, const char *path, zfs_type_t types) 3001{ 3002 zfs_handle_t *zhp; 3003 3004 if (!zfs_validate_name(hdl, path, types, B_FALSE)) 3005 return (B_FALSE); 3006 3007 /* 3008 * Try to get stats for the dataset, which will tell us if it exists. 3009 */ 3010 if ((zhp = make_dataset_handle(hdl, path)) != NULL) { 3011 int ds_type = zhp->zfs_type; 3012 3013 zfs_close(zhp); 3014 if (types & ds_type) 3015 return (B_TRUE); 3016 } 3017 return (B_FALSE); 3018} 3019 3020/* 3021 * Given a path to 'target', create all the ancestors between 3022 * the prefixlen portion of the path, and the target itself. 3023 * Fail if the initial prefixlen-ancestor does not already exist. 3024 */ 3025int 3026create_parents(libzfs_handle_t *hdl, char *target, int prefixlen) 3027{ 3028 zfs_handle_t *h; 3029 char *cp; 3030 const char *opname; 3031 3032 /* make sure prefix exists */ 3033 cp = target + prefixlen; 3034 if (*cp != '/') { 3035 assert(strchr(cp, '/') == NULL); 3036 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM); 3037 } else { 3038 *cp = '\0'; 3039 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM); 3040 *cp = '/'; 3041 } 3042 if (h == NULL) 3043 return (-1); 3044 zfs_close(h); 3045 3046 /* 3047 * Attempt to create, mount, and share any ancestor filesystems, 3048 * up to the prefixlen-long one. 3049 */ 3050 for (cp = target + prefixlen + 1; 3051 cp = strchr(cp, '/'); *cp = '/', cp++) { 3052 3053 *cp = '\0'; 3054 3055 h = make_dataset_handle(hdl, target); 3056 if (h) { 3057 /* it already exists, nothing to do here */ 3058 zfs_close(h); 3059 continue; 3060 } 3061 3062 if (zfs_create(hdl, target, ZFS_TYPE_FILESYSTEM, 3063 NULL) != 0) { 3064 opname = dgettext(TEXT_DOMAIN, "create"); 3065 goto ancestorerr; 3066 } 3067 3068 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM); 3069 if (h == NULL) { 3070 opname = dgettext(TEXT_DOMAIN, "open"); 3071 goto ancestorerr; 3072 } 3073 3074 if (zfs_mount(h, NULL, 0) != 0) { 3075 opname = dgettext(TEXT_DOMAIN, "mount"); 3076 goto ancestorerr; 3077 } 3078 3079 if (zfs_share(h) != 0) { 3080 opname = dgettext(TEXT_DOMAIN, "share"); 3081 goto ancestorerr; 3082 } 3083 3084 zfs_close(h); 3085 } 3086 3087 return (0); 3088 3089ancestorerr: 3090 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3091 "failed to %s ancestor '%s'"), opname, target); 3092 return (-1); 3093} 3094 3095/* 3096 * Creates non-existing ancestors of the given path. 3097 */ 3098int 3099zfs_create_ancestors(libzfs_handle_t *hdl, const char *path) 3100{ 3101 int prefix; 3102 char *path_copy; 3103 int rc; 3104 3105 if (check_parents(hdl, path, NULL, B_TRUE, &prefix) != 0) 3106 return (-1); 3107 3108 if ((path_copy = strdup(path)) != NULL) { 3109 rc = create_parents(hdl, path_copy, prefix); 3110 free(path_copy); 3111 } 3112 if (path_copy == NULL || rc != 0) 3113 return (-1); 3114 3115 return (0); 3116} 3117 3118/* 3119 * Create a new filesystem or volume. 3120 */ 3121int 3122zfs_create(libzfs_handle_t *hdl, const char *path, zfs_type_t type, 3123 nvlist_t *props) 3124{ 3125 int ret; 3126 uint64_t size = 0; 3127 uint64_t blocksize = zfs_prop_default_numeric(ZFS_PROP_VOLBLOCKSIZE); 3128 char errbuf[1024]; 3129 uint64_t zoned; 3130 dmu_objset_type_t ost; 3131 3132 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3133 "cannot create '%s'"), path); 3134 3135 /* validate the path, taking care to note the extended error message */ 3136 if (!zfs_validate_name(hdl, path, type, B_TRUE)) 3137 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3138 3139 /* validate parents exist */ 3140 if (check_parents(hdl, path, &zoned, B_FALSE, NULL) != 0) 3141 return (-1); 3142 3143 /* 3144 * The failure modes when creating a dataset of a different type over 3145 * one that already exists is a little strange. In particular, if you 3146 * try to create a dataset on top of an existing dataset, the ioctl() 3147 * will return ENOENT, not EEXIST. To prevent this from happening, we 3148 * first try to see if the dataset exists. 3149 */ 3150 if (zfs_dataset_exists(hdl, path, ZFS_TYPE_DATASET)) { 3151 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3152 "dataset already exists")); 3153 return (zfs_error(hdl, EZFS_EXISTS, errbuf)); 3154 } 3155 3156 if (type == ZFS_TYPE_VOLUME) 3157 ost = DMU_OST_ZVOL; 3158 else 3159 ost = DMU_OST_ZFS; 3160 3161 if (props && (props = zfs_valid_proplist(hdl, type, props, 3162 zoned, NULL, errbuf)) == 0) 3163 return (-1); 3164 3165 if (type == ZFS_TYPE_VOLUME) { 3166 /* 3167 * If we are creating a volume, the size and block size must 3168 * satisfy a few restraints. First, the blocksize must be a 3169 * valid block size between SPA_{MIN,MAX}BLOCKSIZE. Second, the 3170 * volsize must be a multiple of the block size, and cannot be 3171 * zero. 3172 */ 3173 if (props == NULL || nvlist_lookup_uint64(props, 3174 zfs_prop_to_name(ZFS_PROP_VOLSIZE), &size) != 0) { 3175 nvlist_free(props); 3176 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3177 "missing volume size")); 3178 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 3179 } 3180 3181 if ((ret = nvlist_lookup_uint64(props, 3182 zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE), 3183 &blocksize)) != 0) { 3184 if (ret == ENOENT) { 3185 blocksize = zfs_prop_default_numeric( 3186 ZFS_PROP_VOLBLOCKSIZE); 3187 } else { 3188 nvlist_free(props); 3189 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3190 "missing volume block size")); 3191 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 3192 } 3193 } 3194 3195 if (size == 0) { 3196 nvlist_free(props); 3197 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3198 "volume size cannot be zero")); 3199 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 3200 } 3201 3202 if (size % blocksize != 0) { 3203 nvlist_free(props); 3204 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3205 "volume size must be a multiple of volume block " 3206 "size")); 3207 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 3208 } 3209 } 3210 3211 /* create the dataset */ 3212 ret = lzc_create(path, ost, props); 3213 nvlist_free(props); 3214 3215 /* check for failure */ 3216 if (ret != 0) { 3217 char parent[ZFS_MAXNAMELEN]; 3218 (void) parent_name(path, parent, sizeof (parent)); 3219 3220 switch (errno) { 3221 case ENOENT: 3222 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3223 "no such parent '%s'"), parent); 3224 return (zfs_error(hdl, EZFS_NOENT, errbuf)); 3225 3226 case EINVAL: 3227 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3228 "parent '%s' is not a filesystem"), parent); 3229 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 3230 3231 case EDOM: 3232 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3233 "volume block size must be power of 2 from " 3234 "512B to 128KB")); 3235 3236 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 3237 3238 case ENOTSUP: 3239 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3240 "pool must be upgraded to set this " 3241 "property or value")); 3242 return (zfs_error(hdl, EZFS_BADVERSION, errbuf)); 3243#ifdef _ILP32 3244 case EOVERFLOW: 3245 /* 3246 * This platform can't address a volume this big. 3247 */ 3248 if (type == ZFS_TYPE_VOLUME) 3249 return (zfs_error(hdl, EZFS_VOLTOOBIG, 3250 errbuf)); 3251#endif 3252 /* FALLTHROUGH */ 3253 default: 3254 return (zfs_standard_error(hdl, errno, errbuf)); 3255 } 3256 } 3257 3258 return (0); 3259} 3260 3261/* 3262 * Destroys the given dataset. The caller must make sure that the filesystem 3263 * isn't mounted, and that there are no active dependents. If the file system 3264 * does not exist this function does nothing. 3265 */ 3266int 3267zfs_destroy(zfs_handle_t *zhp, boolean_t defer) 3268{ 3269 zfs_cmd_t zc = { 0 }; 3270 3271 if (zhp->zfs_type == ZFS_TYPE_BOOKMARK) { 3272 nvlist_t *nv = fnvlist_alloc(); 3273 fnvlist_add_boolean(nv, zhp->zfs_name); 3274 int error = lzc_destroy_bookmarks(nv, NULL); 3275 fnvlist_free(nv); 3276 if (error != 0) { 3277 return (zfs_standard_error_fmt(zhp->zfs_hdl, errno, 3278 dgettext(TEXT_DOMAIN, "cannot destroy '%s'"), 3279 zhp->zfs_name)); 3280 } 3281 return (0); 3282 } 3283 3284 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 3285 3286 if (ZFS_IS_VOLUME(zhp)) { 3287 zc.zc_objset_type = DMU_OST_ZVOL; 3288 } else { 3289 zc.zc_objset_type = DMU_OST_ZFS; 3290 } 3291 3292 zc.zc_defer_destroy = defer; 3293 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_DESTROY, &zc) != 0 && 3294 errno != ENOENT) { 3295 return (zfs_standard_error_fmt(zhp->zfs_hdl, errno, 3296 dgettext(TEXT_DOMAIN, "cannot destroy '%s'"), 3297 zhp->zfs_name)); 3298 } 3299 3300 remove_mountpoint(zhp); 3301 3302 return (0); 3303} 3304 3305struct destroydata { 3306 nvlist_t *nvl; 3307 const char *snapname; 3308}; 3309 3310static int 3311zfs_check_snap_cb(zfs_handle_t *zhp, void *arg) 3312{ 3313 struct destroydata *dd = arg; 3314 char name[ZFS_MAXNAMELEN]; 3315 int rv = 0; 3316 3317 (void) snprintf(name, sizeof (name), 3318 "%s@%s", zhp->zfs_name, dd->snapname); 3319 3320 if (lzc_exists(name)) 3321 verify(nvlist_add_boolean(dd->nvl, name) == 0); 3322 3323 rv = zfs_iter_filesystems(zhp, zfs_check_snap_cb, dd); 3324 zfs_close(zhp); 3325 return (rv); 3326} 3327 3328/* 3329 * Destroys all snapshots with the given name in zhp & descendants. 3330 */ 3331int 3332zfs_destroy_snaps(zfs_handle_t *zhp, char *snapname, boolean_t defer) 3333{ 3334 int ret; 3335 struct destroydata dd = { 0 }; 3336 3337 dd.snapname = snapname; 3338 verify(nvlist_alloc(&dd.nvl, NV_UNIQUE_NAME, 0) == 0); 3339 (void) zfs_check_snap_cb(zfs_handle_dup(zhp), &dd); 3340 3341 if (nvlist_empty(dd.nvl)) { 3342 ret = zfs_standard_error_fmt(zhp->zfs_hdl, ENOENT, 3343 dgettext(TEXT_DOMAIN, "cannot destroy '%s@%s'"), 3344 zhp->zfs_name, snapname); 3345 } else { 3346 ret = zfs_destroy_snaps_nvl(zhp->zfs_hdl, dd.nvl, defer); 3347 } 3348 nvlist_free(dd.nvl); 3349 return (ret); 3350} 3351 3352/* 3353 * Destroys all the snapshots named in the nvlist. 3354 */ 3355int 3356zfs_destroy_snaps_nvl(libzfs_handle_t *hdl, nvlist_t *snaps, boolean_t defer) 3357{ 3358 int ret; 3359 nvlist_t *errlist; 3360 3361 ret = lzc_destroy_snaps(snaps, defer, &errlist); 3362 3363 if (ret == 0) 3364 return (0); 3365 3366 if (nvlist_empty(errlist)) { 3367 char errbuf[1024]; 3368 (void) snprintf(errbuf, sizeof (errbuf), 3369 dgettext(TEXT_DOMAIN, "cannot destroy snapshots")); 3370 3371 ret = zfs_standard_error(hdl, ret, errbuf); 3372 } 3373 for (nvpair_t *pair = nvlist_next_nvpair(errlist, NULL); 3374 pair != NULL; pair = nvlist_next_nvpair(errlist, pair)) { 3375 char errbuf[1024]; 3376 (void) snprintf(errbuf, sizeof (errbuf), 3377 dgettext(TEXT_DOMAIN, "cannot destroy snapshot %s"), 3378 nvpair_name(pair)); 3379 3380 switch (fnvpair_value_int32(pair)) { 3381 case EEXIST: 3382 zfs_error_aux(hdl, 3383 dgettext(TEXT_DOMAIN, "snapshot is cloned")); 3384 ret = zfs_error(hdl, EZFS_EXISTS, errbuf); 3385 break; 3386 default: 3387 ret = zfs_standard_error(hdl, errno, errbuf); 3388 break; 3389 } 3390 } 3391 3392 return (ret); 3393} 3394 3395/* 3396 * Clones the given dataset. The target must be of the same type as the source. 3397 */ 3398int 3399zfs_clone(zfs_handle_t *zhp, const char *target, nvlist_t *props) 3400{ 3401 char parent[ZFS_MAXNAMELEN]; 3402 int ret; 3403 char errbuf[1024]; 3404 libzfs_handle_t *hdl = zhp->zfs_hdl; 3405 uint64_t zoned; 3406 3407 assert(zhp->zfs_type == ZFS_TYPE_SNAPSHOT); 3408 3409 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3410 "cannot create '%s'"), target); 3411 3412 /* validate the target/clone name */ 3413 if (!zfs_validate_name(hdl, target, ZFS_TYPE_FILESYSTEM, B_TRUE)) 3414 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3415 3416 /* validate parents exist */ 3417 if (check_parents(hdl, target, &zoned, B_FALSE, NULL) != 0) 3418 return (-1); 3419 3420 (void) parent_name(target, parent, sizeof (parent)); 3421 3422 /* do the clone */ 3423 3424 if (props) { 3425 zfs_type_t type; 3426 if (ZFS_IS_VOLUME(zhp)) { 3427 type = ZFS_TYPE_VOLUME; 3428 } else { 3429 type = ZFS_TYPE_FILESYSTEM; 3430 } 3431 if ((props = zfs_valid_proplist(hdl, type, props, zoned, 3432 zhp, errbuf)) == NULL) 3433 return (-1); 3434 } 3435 3436 ret = lzc_clone(target, zhp->zfs_name, props); 3437 nvlist_free(props); 3438 3439 if (ret != 0) { 3440 switch (errno) { 3441 3442 case ENOENT: 3443 /* 3444 * The parent doesn't exist. We should have caught this 3445 * above, but there may a race condition that has since 3446 * destroyed the parent. 3447 * 3448 * At this point, we don't know whether it's the source 3449 * that doesn't exist anymore, or whether the target 3450 * dataset doesn't exist. 3451 */ 3452 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN, 3453 "no such parent '%s'"), parent); 3454 return (zfs_error(zhp->zfs_hdl, EZFS_NOENT, errbuf)); 3455 3456 case EXDEV: 3457 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN, 3458 "source and target pools differ")); 3459 return (zfs_error(zhp->zfs_hdl, EZFS_CROSSTARGET, 3460 errbuf)); 3461 3462 default: 3463 return (zfs_standard_error(zhp->zfs_hdl, errno, 3464 errbuf)); 3465 } 3466 } 3467 3468 return (ret); 3469} 3470 3471/* 3472 * Promotes the given clone fs to be the clone parent. 3473 */ 3474int 3475zfs_promote(zfs_handle_t *zhp) 3476{ 3477 libzfs_handle_t *hdl = zhp->zfs_hdl; 3478 zfs_cmd_t zc = { 0 }; 3479 char parent[MAXPATHLEN]; 3480 int ret; 3481 char errbuf[1024]; 3482 3483 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3484 "cannot promote '%s'"), zhp->zfs_name); 3485 3486 if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) { 3487 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3488 "snapshots can not be promoted")); 3489 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 3490 } 3491 3492 (void) strlcpy(parent, zhp->zfs_dmustats.dds_origin, sizeof (parent)); 3493 if (parent[0] == '\0') { 3494 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3495 "not a cloned filesystem")); 3496 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 3497 } 3498 3499 (void) strlcpy(zc.zc_value, zhp->zfs_dmustats.dds_origin, 3500 sizeof (zc.zc_value)); 3501 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 3502 ret = zfs_ioctl(hdl, ZFS_IOC_PROMOTE, &zc); 3503 3504 if (ret != 0) { 3505 int save_errno = errno; 3506 3507 switch (save_errno) { 3508 case EEXIST: 3509 /* There is a conflicting snapshot name. */ 3510 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3511 "conflicting snapshot '%s' from parent '%s'"), 3512 zc.zc_string, parent); 3513 return (zfs_error(hdl, EZFS_EXISTS, errbuf)); 3514 3515 default: 3516 return (zfs_standard_error(hdl, save_errno, errbuf)); 3517 } 3518 } 3519 return (ret); 3520} 3521 3522typedef struct snapdata { 3523 nvlist_t *sd_nvl; 3524 const char *sd_snapname; 3525} snapdata_t; 3526 3527static int 3528zfs_snapshot_cb(zfs_handle_t *zhp, void *arg) 3529{ 3530 snapdata_t *sd = arg; 3531 char name[ZFS_MAXNAMELEN]; 3532 int rv = 0; 3533 3534 if (zfs_prop_get_int(zhp, ZFS_PROP_INCONSISTENT) == 0) { 3535 (void) snprintf(name, sizeof (name), 3536 "%s@%s", zfs_get_name(zhp), sd->sd_snapname); 3537 3538 fnvlist_add_boolean(sd->sd_nvl, name); 3539 3540 rv = zfs_iter_filesystems(zhp, zfs_snapshot_cb, sd); 3541 } 3542 zfs_close(zhp); 3543 3544 return (rv); 3545} 3546 3547/* 3548 * Creates snapshots. The keys in the snaps nvlist are the snapshots to be 3549 * created. 3550 */ 3551int 3552zfs_snapshot_nvl(libzfs_handle_t *hdl, nvlist_t *snaps, nvlist_t *props) 3553{ 3554 int ret; 3555 char errbuf[1024]; 3556 nvpair_t *elem; 3557 nvlist_t *errors; 3558 3559 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3560 "cannot create snapshots ")); 3561 3562 elem = NULL; 3563 while ((elem = nvlist_next_nvpair(snaps, elem)) != NULL) { 3564 const char *snapname = nvpair_name(elem); 3565 3566 /* validate the target name */ 3567 if (!zfs_validate_name(hdl, snapname, ZFS_TYPE_SNAPSHOT, 3568 B_TRUE)) { 3569 (void) snprintf(errbuf, sizeof (errbuf), 3570 dgettext(TEXT_DOMAIN, 3571 "cannot create snapshot '%s'"), snapname); 3572 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3573 } 3574 } 3575 3576 if (props != NULL && 3577 (props = zfs_valid_proplist(hdl, ZFS_TYPE_SNAPSHOT, 3578 props, B_FALSE, NULL, errbuf)) == NULL) { 3579 return (-1); 3580 } 3581 3582 ret = lzc_snapshot(snaps, props, &errors); 3583 3584 if (ret != 0) { 3585 boolean_t printed = B_FALSE; 3586 for (elem = nvlist_next_nvpair(errors, NULL); 3587 elem != NULL; 3588 elem = nvlist_next_nvpair(errors, elem)) { 3589 (void) snprintf(errbuf, sizeof (errbuf), 3590 dgettext(TEXT_DOMAIN, 3591 "cannot create snapshot '%s'"), nvpair_name(elem)); 3592 (void) zfs_standard_error(hdl, 3593 fnvpair_value_int32(elem), errbuf); 3594 printed = B_TRUE; 3595 } 3596 if (!printed) { 3597 switch (ret) { 3598 case EXDEV: 3599 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3600 "multiple snapshots of same " 3601 "fs not allowed")); 3602 (void) zfs_error(hdl, EZFS_EXISTS, errbuf); 3603 3604 break; 3605 default: 3606 (void) zfs_standard_error(hdl, ret, errbuf); 3607 } 3608 } 3609 } 3610 3611 nvlist_free(props); 3612 nvlist_free(errors); 3613 return (ret); 3614} 3615 3616int 3617zfs_snapshot(libzfs_handle_t *hdl, const char *path, boolean_t recursive, 3618 nvlist_t *props) 3619{ 3620 int ret; 3621 snapdata_t sd = { 0 }; 3622 char fsname[ZFS_MAXNAMELEN]; 3623 char *cp; 3624 zfs_handle_t *zhp; 3625 char errbuf[1024]; 3626 3627 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3628 "cannot snapshot %s"), path); 3629 3630 if (!zfs_validate_name(hdl, path, ZFS_TYPE_SNAPSHOT, B_TRUE)) 3631 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3632 3633 (void) strlcpy(fsname, path, sizeof (fsname)); 3634 cp = strchr(fsname, '@'); 3635 *cp = '\0'; 3636 sd.sd_snapname = cp + 1; 3637 3638 if ((zhp = zfs_open(hdl, fsname, ZFS_TYPE_FILESYSTEM | 3639 ZFS_TYPE_VOLUME)) == NULL) { 3640 return (-1); 3641 } 3642 3643 verify(nvlist_alloc(&sd.sd_nvl, NV_UNIQUE_NAME, 0) == 0); 3644 if (recursive) { 3645 (void) zfs_snapshot_cb(zfs_handle_dup(zhp), &sd); 3646 } else { 3647 fnvlist_add_boolean(sd.sd_nvl, path); 3648 } 3649 3650 ret = zfs_snapshot_nvl(hdl, sd.sd_nvl, props); 3651 nvlist_free(sd.sd_nvl); 3652 zfs_close(zhp); 3653 return (ret); 3654} 3655 3656/* 3657 * Destroy any more recent snapshots. We invoke this callback on any dependents 3658 * of the snapshot first. If the 'cb_dependent' member is non-zero, then this 3659 * is a dependent and we should just destroy it without checking the transaction 3660 * group. 3661 */ 3662typedef struct rollback_data { 3663 const char *cb_target; /* the snapshot */ 3664 uint64_t cb_create; /* creation time reference */ 3665 boolean_t cb_error; 3666 boolean_t cb_force; 3667} rollback_data_t; 3668 3669static int 3670rollback_destroy_dependent(zfs_handle_t *zhp, void *data) 3671{ 3672 rollback_data_t *cbp = data; 3673 prop_changelist_t *clp; 3674 3675 /* We must destroy this clone; first unmount it */ 3676 clp = changelist_gather(zhp, ZFS_PROP_NAME, 0, 3677 cbp->cb_force ? MS_FORCE: 0); 3678 if (clp == NULL || changelist_prefix(clp) != 0) { 3679 cbp->cb_error = B_TRUE; 3680 zfs_close(zhp); 3681 return (0); 3682 } 3683 if (zfs_destroy(zhp, B_FALSE) != 0) 3684 cbp->cb_error = B_TRUE; 3685 else 3686 changelist_remove(clp, zhp->zfs_name); 3687 (void) changelist_postfix(clp); 3688 changelist_free(clp); 3689 3690 zfs_close(zhp); 3691 return (0); 3692} 3693 3694static int 3695rollback_destroy(zfs_handle_t *zhp, void *data) 3696{ 3697 rollback_data_t *cbp = data; 3698 3699 if (zfs_prop_get_int(zhp, ZFS_PROP_CREATETXG) > cbp->cb_create) { 3700 cbp->cb_error |= zfs_iter_dependents(zhp, B_FALSE, 3701 rollback_destroy_dependent, cbp); 3702 3703 cbp->cb_error |= zfs_destroy(zhp, B_FALSE); 3704 } 3705 3706 zfs_close(zhp); 3707 return (0); 3708} 3709 3710/* 3711 * Given a dataset, rollback to a specific snapshot, discarding any 3712 * data changes since then and making it the active dataset. 3713 * 3714 * Any snapshots and bookmarks more recent than the target are 3715 * destroyed, along with their dependents (i.e. clones). 3716 */ 3717int 3718zfs_rollback(zfs_handle_t *zhp, zfs_handle_t *snap, boolean_t force) 3719{ 3720 rollback_data_t cb = { 0 }; 3721 int err; 3722 boolean_t restore_resv = 0; 3723 uint64_t old_volsize, new_volsize; 3724 zfs_prop_t resv_prop; 3725 3726 assert(zhp->zfs_type == ZFS_TYPE_FILESYSTEM || 3727 zhp->zfs_type == ZFS_TYPE_VOLUME); 3728 3729 /* 3730 * Destroy all recent snapshots and their dependents. 3731 */ 3732 cb.cb_force = force; 3733 cb.cb_target = snap->zfs_name; 3734 cb.cb_create = zfs_prop_get_int(snap, ZFS_PROP_CREATETXG); 3735 (void) zfs_iter_snapshots(zhp, B_FALSE, rollback_destroy, &cb); 3736 (void) zfs_iter_bookmarks(zhp, rollback_destroy, &cb); 3737 3738 if (cb.cb_error) 3739 return (-1); 3740 3741 /* 3742 * Now that we have verified that the snapshot is the latest, 3743 * rollback to the given snapshot. 3744 */ 3745 3746 if (zhp->zfs_type == ZFS_TYPE_VOLUME) { 3747 if (zfs_which_resv_prop(zhp, &resv_prop) < 0) 3748 return (-1); 3749 old_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE); 3750 restore_resv = 3751 (old_volsize == zfs_prop_get_int(zhp, resv_prop)); 3752 } 3753 3754 /* 3755 * We rely on zfs_iter_children() to verify that there are no 3756 * newer snapshots for the given dataset. Therefore, we can 3757 * simply pass the name on to the ioctl() call. There is still 3758 * an unlikely race condition where the user has taken a 3759 * snapshot since we verified that this was the most recent. 3760 */ 3761 err = lzc_rollback(zhp->zfs_name, NULL, 0); 3762 if (err != 0) { 3763 (void) zfs_standard_error_fmt(zhp->zfs_hdl, errno, 3764 dgettext(TEXT_DOMAIN, "cannot rollback '%s'"), 3765 zhp->zfs_name); 3766 return (err); 3767 } 3768 3769 /* 3770 * For volumes, if the pre-rollback volsize matched the pre- 3771 * rollback reservation and the volsize has changed then set 3772 * the reservation property to the post-rollback volsize. 3773 * Make a new handle since the rollback closed the dataset. 3774 */ 3775 if ((zhp->zfs_type == ZFS_TYPE_VOLUME) && 3776 (zhp = make_dataset_handle(zhp->zfs_hdl, zhp->zfs_name))) { 3777 if (restore_resv) { 3778 new_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE); 3779 if (old_volsize != new_volsize) 3780 err = zfs_prop_set_int(zhp, resv_prop, 3781 new_volsize); 3782 } 3783 zfs_close(zhp); 3784 } 3785 return (err); 3786} 3787 3788/* 3789 * Renames the given dataset. 3790 */ 3791int 3792zfs_rename(zfs_handle_t *zhp, const char *source, const char *target, 3793 renameflags_t flags) 3794{ 3795 int ret; 3796 zfs_cmd_t zc = { 0 }; 3797 char *delim; 3798 prop_changelist_t *cl = NULL; 3799 zfs_handle_t *zhrp = NULL; 3800 char *parentname = NULL; 3801 char parent[ZFS_MAXNAMELEN]; 3802 char property[ZFS_MAXPROPLEN]; 3803 libzfs_handle_t *hdl = zhp->zfs_hdl; 3804 char errbuf[1024]; 3805 3806 /* if we have the same exact name, just return success */ 3807 if (strcmp(zhp->zfs_name, target) == 0) 3808 return (0); 3809 3810 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3811 "cannot rename to '%s'"), target); 3812 3813 if (source != NULL) { 3814 /* 3815 * This is recursive snapshots rename, put snapshot name 3816 * (that might not exist) into zfs_name. 3817 */ 3818 assert(flags.recurse); 3819 3820 (void) strlcat(zhp->zfs_name, "@", sizeof(zhp->zfs_name)); 3821 (void) strlcat(zhp->zfs_name, source, sizeof(zhp->zfs_name)); 3822 zhp->zfs_type = ZFS_TYPE_SNAPSHOT; 3823 } 3824 3825 /* 3826 * Make sure the target name is valid 3827 */ 3828 if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) { 3829 if ((strchr(target, '@') == NULL) || 3830 *target == '@') { 3831 /* 3832 * Snapshot target name is abbreviated, 3833 * reconstruct full dataset name 3834 */ 3835 (void) strlcpy(parent, zhp->zfs_name, 3836 sizeof (parent)); 3837 delim = strchr(parent, '@'); 3838 if (strchr(target, '@') == NULL) 3839 *(++delim) = '\0'; 3840 else 3841 *delim = '\0'; 3842 (void) strlcat(parent, target, sizeof (parent)); 3843 target = parent; 3844 } else { 3845 /* 3846 * Make sure we're renaming within the same dataset. 3847 */ 3848 delim = strchr(target, '@'); 3849 if (strncmp(zhp->zfs_name, target, delim - target) 3850 != 0 || zhp->zfs_name[delim - target] != '@') { 3851 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3852 "snapshots must be part of same " 3853 "dataset")); 3854 return (zfs_error(hdl, EZFS_CROSSTARGET, 3855 errbuf)); 3856 } 3857 } 3858 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE)) 3859 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3860 } else { 3861 if (flags.recurse) { 3862 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3863 "recursive rename must be a snapshot")); 3864 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 3865 } 3866 3867 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE)) 3868 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3869 3870 /* validate parents */ 3871 if (check_parents(hdl, target, NULL, B_FALSE, NULL) != 0) 3872 return (-1); 3873 3874 /* make sure we're in the same pool */ 3875 verify((delim = strchr(target, '/')) != NULL); 3876 if (strncmp(zhp->zfs_name, target, delim - target) != 0 || 3877 zhp->zfs_name[delim - target] != '/') { 3878 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3879 "datasets must be within same pool")); 3880 return (zfs_error(hdl, EZFS_CROSSTARGET, errbuf)); 3881 } 3882 3883 /* new name cannot be a child of the current dataset name */ 3884 if (is_descendant(zhp->zfs_name, target)) { 3885 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3886 "New dataset name cannot be a descendant of " 3887 "current dataset name")); 3888 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3889 } 3890 } 3891 3892 (void) snprintf(errbuf, sizeof (errbuf), 3893 dgettext(TEXT_DOMAIN, "cannot rename '%s'"), zhp->zfs_name); 3894 3895 if (getzoneid() == GLOBAL_ZONEID && 3896 zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) { 3897 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3898 "dataset is used in a non-global zone")); 3899 return (zfs_error(hdl, EZFS_ZONED, errbuf)); 3900 } 3901 3902 /* 3903 * Avoid unmounting file systems with mountpoint property set to 3904 * 'legacy' or 'none' even if -u option is not given. 3905 */ 3906 if (zhp->zfs_type == ZFS_TYPE_FILESYSTEM && 3907 !flags.recurse && !flags.nounmount && 3908 zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, property, 3909 sizeof (property), NULL, NULL, 0, B_FALSE) == 0 && 3910 (strcmp(property, "legacy") == 0 || 3911 strcmp(property, "none") == 0)) { 3912 flags.nounmount = B_TRUE; 3913 } 3914 if (flags.recurse) { 3915 3916 parentname = zfs_strdup(zhp->zfs_hdl, zhp->zfs_name); 3917 if (parentname == NULL) { 3918 ret = -1; 3919 goto error; 3920 } 3921 delim = strchr(parentname, '@'); 3922 *delim = '\0'; 3923 zhrp = zfs_open(zhp->zfs_hdl, parentname, ZFS_TYPE_DATASET); 3924 if (zhrp == NULL) { 3925 ret = -1; 3926 goto error; 3927 } 3928 } else if (zhp->zfs_type != ZFS_TYPE_SNAPSHOT) { 3929 if ((cl = changelist_gather(zhp, ZFS_PROP_NAME, 3930 flags.nounmount ? CL_GATHER_DONT_UNMOUNT : 0, 3931 flags.forceunmount ? MS_FORCE : 0)) == NULL) { 3932 return (-1); 3933 } 3934 3935 if (changelist_haszonedchild(cl)) { 3936 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3937 "child dataset with inherited mountpoint is used " 3938 "in a non-global zone")); 3939 (void) zfs_error(hdl, EZFS_ZONED, errbuf); 3940 goto error; 3941 } 3942 3943 if ((ret = changelist_prefix(cl)) != 0) 3944 goto error; 3945 } 3946 3947 if (ZFS_IS_VOLUME(zhp)) 3948 zc.zc_objset_type = DMU_OST_ZVOL; 3949 else 3950 zc.zc_objset_type = DMU_OST_ZFS; 3951 3952 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 3953 (void) strlcpy(zc.zc_value, target, sizeof (zc.zc_value)); 3954 3955 zc.zc_cookie = flags.recurse ? 1 : 0; 3956 if (flags.nounmount) 3957 zc.zc_cookie |= 2; 3958 3959 if ((ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_RENAME, &zc)) != 0) { 3960 /* 3961 * if it was recursive, the one that actually failed will 3962 * be in zc.zc_name 3963 */ 3964 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3965 "cannot rename '%s'"), zc.zc_name); 3966 3967 if (flags.recurse && errno == EEXIST) { 3968 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3969 "a child dataset already has a snapshot " 3970 "with the new name")); 3971 (void) zfs_error(hdl, EZFS_EXISTS, errbuf); 3972 } else { 3973 (void) zfs_standard_error(zhp->zfs_hdl, errno, errbuf); 3974 } 3975 3976 /* 3977 * On failure, we still want to remount any filesystems that 3978 * were previously mounted, so we don't alter the system state. 3979 */ 3980 if (cl != NULL) 3981 (void) changelist_postfix(cl); 3982 } else { 3983 if (cl != NULL) { 3984 changelist_rename(cl, zfs_get_name(zhp), target); 3985 ret = changelist_postfix(cl); 3986 } 3987 } 3988 3989error: 3990 if (parentname != NULL) { 3991 free(parentname); 3992 } 3993 if (zhrp != NULL) { 3994 zfs_close(zhrp); 3995 } 3996 if (cl != NULL) { 3997 changelist_free(cl); 3998 } 3999 return (ret); 4000} 4001 4002nvlist_t * 4003zfs_get_user_props(zfs_handle_t *zhp) 4004{ 4005 return (zhp->zfs_user_props); 4006} 4007 4008nvlist_t * 4009zfs_get_recvd_props(zfs_handle_t *zhp) 4010{ 4011 if (zhp->zfs_recvd_props == NULL) 4012 if (get_recvd_props_ioctl(zhp) != 0) 4013 return (NULL); 4014 return (zhp->zfs_recvd_props); 4015} 4016 4017/* 4018 * This function is used by 'zfs list' to determine the exact set of columns to 4019 * display, and their maximum widths. This does two main things: 4020 * 4021 * - If this is a list of all properties, then expand the list to include 4022 * all native properties, and set a flag so that for each dataset we look 4023 * for new unique user properties and add them to the list. 4024 * 4025 * - For non fixed-width properties, keep track of the maximum width seen 4026 * so that we can size the column appropriately. If the user has 4027 * requested received property values, we also need to compute the width 4028 * of the RECEIVED column. 4029 */ 4030int 4031zfs_expand_proplist(zfs_handle_t *zhp, zprop_list_t **plp, boolean_t received, 4032 boolean_t literal) 4033{ 4034 libzfs_handle_t *hdl = zhp->zfs_hdl; 4035 zprop_list_t *entry; 4036 zprop_list_t **last, **start; 4037 nvlist_t *userprops, *propval; 4038 nvpair_t *elem; 4039 char *strval; 4040 char buf[ZFS_MAXPROPLEN]; 4041 4042 if (zprop_expand_list(hdl, plp, ZFS_TYPE_DATASET) != 0) 4043 return (-1); 4044 4045 userprops = zfs_get_user_props(zhp); 4046 4047 entry = *plp; 4048 if (entry->pl_all && nvlist_next_nvpair(userprops, NULL) != NULL) { 4049 /* 4050 * Go through and add any user properties as necessary. We 4051 * start by incrementing our list pointer to the first 4052 * non-native property. 4053 */ 4054 start = plp; 4055 while (*start != NULL) { 4056 if ((*start)->pl_prop == ZPROP_INVAL) 4057 break; 4058 start = &(*start)->pl_next; 4059 } 4060 4061 elem = NULL; 4062 while ((elem = nvlist_next_nvpair(userprops, elem)) != NULL) { 4063 /* 4064 * See if we've already found this property in our list. 4065 */ 4066 for (last = start; *last != NULL; 4067 last = &(*last)->pl_next) { 4068 if (strcmp((*last)->pl_user_prop, 4069 nvpair_name(elem)) == 0) 4070 break; 4071 } 4072 4073 if (*last == NULL) { 4074 if ((entry = zfs_alloc(hdl, 4075 sizeof (zprop_list_t))) == NULL || 4076 ((entry->pl_user_prop = zfs_strdup(hdl, 4077 nvpair_name(elem)))) == NULL) { 4078 free(entry); 4079 return (-1); 4080 } 4081 4082 entry->pl_prop = ZPROP_INVAL; 4083 entry->pl_width = strlen(nvpair_name(elem)); 4084 entry->pl_all = B_TRUE; 4085 *last = entry; 4086 } 4087 } 4088 } 4089 4090 /* 4091 * Now go through and check the width of any non-fixed columns 4092 */ 4093 for (entry = *plp; entry != NULL; entry = entry->pl_next) { 4094 if (entry->pl_fixed && !literal) 4095 continue; 4096 4097 if (entry->pl_prop != ZPROP_INVAL) { 4098 if (zfs_prop_get(zhp, entry->pl_prop, 4099 buf, sizeof (buf), NULL, NULL, 0, literal) == 0) { 4100 if (strlen(buf) > entry->pl_width) 4101 entry->pl_width = strlen(buf); 4102 } 4103 if (received && zfs_prop_get_recvd(zhp, 4104 zfs_prop_to_name(entry->pl_prop), 4105 buf, sizeof (buf), literal) == 0) 4106 if (strlen(buf) > entry->pl_recvd_width) 4107 entry->pl_recvd_width = strlen(buf); 4108 } else { 4109 if (nvlist_lookup_nvlist(userprops, entry->pl_user_prop, 4110 &propval) == 0) { 4111 verify(nvlist_lookup_string(propval, 4112 ZPROP_VALUE, &strval) == 0); 4113 if (strlen(strval) > entry->pl_width) 4114 entry->pl_width = strlen(strval); 4115 } 4116 if (received && zfs_prop_get_recvd(zhp, 4117 entry->pl_user_prop, 4118 buf, sizeof (buf), literal) == 0) 4119 if (strlen(buf) > entry->pl_recvd_width) 4120 entry->pl_recvd_width = strlen(buf); 4121 } 4122 } 4123 4124 return (0); 4125} 4126 4127int 4128zfs_deleg_share_nfs(libzfs_handle_t *hdl, char *dataset, char *path, 4129 char *resource, void *export, void *sharetab, 4130 int sharemax, zfs_share_op_t operation) 4131{ 4132 zfs_cmd_t zc = { 0 }; 4133 int error; 4134 4135 (void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name)); 4136 (void) strlcpy(zc.zc_value, path, sizeof (zc.zc_value)); 4137 if (resource) 4138 (void) strlcpy(zc.zc_string, resource, sizeof (zc.zc_string)); 4139 zc.zc_share.z_sharedata = (uint64_t)(uintptr_t)sharetab; 4140 zc.zc_share.z_exportdata = (uint64_t)(uintptr_t)export; 4141 zc.zc_share.z_sharetype = operation; 4142 zc.zc_share.z_sharemax = sharemax; 4143 error = ioctl(hdl->libzfs_fd, ZFS_IOC_SHARE, &zc); 4144 return (error); 4145} 4146 4147void 4148zfs_prune_proplist(zfs_handle_t *zhp, uint8_t *props) 4149{ 4150 nvpair_t *curr; 4151 4152 /* 4153 * Keep a reference to the props-table against which we prune the 4154 * properties. 4155 */ 4156 zhp->zfs_props_table = props; 4157 4158 curr = nvlist_next_nvpair(zhp->zfs_props, NULL); 4159 4160 while (curr) { 4161 zfs_prop_t zfs_prop = zfs_name_to_prop(nvpair_name(curr)); 4162 nvpair_t *next = nvlist_next_nvpair(zhp->zfs_props, curr); 4163 4164 /* 4165 * User properties will result in ZPROP_INVAL, and since we 4166 * only know how to prune standard ZFS properties, we always 4167 * leave these in the list. This can also happen if we 4168 * encounter an unknown DSL property (when running older 4169 * software, for example). 4170 */ 4171 if (zfs_prop != ZPROP_INVAL && props[zfs_prop] == B_FALSE) 4172 (void) nvlist_remove(zhp->zfs_props, 4173 nvpair_name(curr), nvpair_type(curr)); 4174 curr = next; 4175 } 4176} 4177 4178#ifdef sun 4179static int 4180zfs_smb_acl_mgmt(libzfs_handle_t *hdl, char *dataset, char *path, 4181 zfs_smb_acl_op_t cmd, char *resource1, char *resource2) 4182{ 4183 zfs_cmd_t zc = { 0 }; 4184 nvlist_t *nvlist = NULL; 4185 int error; 4186 4187 (void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name)); 4188 (void) strlcpy(zc.zc_value, path, sizeof (zc.zc_value)); 4189 zc.zc_cookie = (uint64_t)cmd; 4190 4191 if (cmd == ZFS_SMB_ACL_RENAME) { 4192 if (nvlist_alloc(&nvlist, NV_UNIQUE_NAME, 0) != 0) { 4193 (void) no_memory(hdl); 4194 return (NULL); 4195 } 4196 } 4197 4198 switch (cmd) { 4199 case ZFS_SMB_ACL_ADD: 4200 case ZFS_SMB_ACL_REMOVE: 4201 (void) strlcpy(zc.zc_string, resource1, sizeof (zc.zc_string)); 4202 break; 4203 case ZFS_SMB_ACL_RENAME: 4204 if (nvlist_add_string(nvlist, ZFS_SMB_ACL_SRC, 4205 resource1) != 0) { 4206 (void) no_memory(hdl); 4207 return (-1); 4208 } 4209 if (nvlist_add_string(nvlist, ZFS_SMB_ACL_TARGET, 4210 resource2) != 0) { 4211 (void) no_memory(hdl); 4212 return (-1); 4213 } 4214 if (zcmd_write_src_nvlist(hdl, &zc, nvlist) != 0) { 4215 nvlist_free(nvlist); 4216 return (-1); 4217 } 4218 break; 4219 case ZFS_SMB_ACL_PURGE: 4220 break; 4221 default: 4222 return (-1); 4223 } 4224 error = ioctl(hdl->libzfs_fd, ZFS_IOC_SMB_ACL, &zc); 4225 if (nvlist) 4226 nvlist_free(nvlist); 4227 return (error); 4228} 4229 4230int 4231zfs_smb_acl_add(libzfs_handle_t *hdl, char *dataset, 4232 char *path, char *resource) 4233{ 4234 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_ADD, 4235 resource, NULL)); 4236} 4237 4238int 4239zfs_smb_acl_remove(libzfs_handle_t *hdl, char *dataset, 4240 char *path, char *resource) 4241{ 4242 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_REMOVE, 4243 resource, NULL)); 4244} 4245 4246int 4247zfs_smb_acl_purge(libzfs_handle_t *hdl, char *dataset, char *path) 4248{ 4249 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_PURGE, 4250 NULL, NULL)); 4251} 4252 4253int 4254zfs_smb_acl_rename(libzfs_handle_t *hdl, char *dataset, char *path, 4255 char *oldname, char *newname) 4256{ 4257 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_RENAME, 4258 oldname, newname)); 4259} 4260#endif /* sun */ 4261 4262int 4263zfs_userspace(zfs_handle_t *zhp, zfs_userquota_prop_t type, 4264 zfs_userspace_cb_t func, void *arg) 4265{ 4266 zfs_cmd_t zc = { 0 }; 4267 zfs_useracct_t buf[100]; 4268 libzfs_handle_t *hdl = zhp->zfs_hdl; 4269 int ret; 4270 4271 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 4272 4273 zc.zc_objset_type = type; 4274 zc.zc_nvlist_dst = (uintptr_t)buf; 4275 4276 for (;;) { 4277 zfs_useracct_t *zua = buf; 4278 4279 zc.zc_nvlist_dst_size = sizeof (buf); 4280 if (zfs_ioctl(hdl, ZFS_IOC_USERSPACE_MANY, &zc) != 0) { 4281 char errbuf[1024]; 4282 4283 (void) snprintf(errbuf, sizeof (errbuf), 4284 dgettext(TEXT_DOMAIN, 4285 "cannot get used/quota for %s"), zc.zc_name); 4286 return (zfs_standard_error_fmt(hdl, errno, errbuf)); 4287 } 4288 if (zc.zc_nvlist_dst_size == 0) 4289 break; 4290 4291 while (zc.zc_nvlist_dst_size > 0) { 4292 if ((ret = func(arg, zua->zu_domain, zua->zu_rid, 4293 zua->zu_space)) != 0) 4294 return (ret); 4295 zua++; 4296 zc.zc_nvlist_dst_size -= sizeof (zfs_useracct_t); 4297 } 4298 } 4299 4300 return (0); 4301} 4302 4303struct holdarg { 4304 nvlist_t *nvl; 4305 const char *snapname; 4306 const char *tag; 4307 boolean_t recursive; 4308 int error; 4309}; 4310 4311static int 4312zfs_hold_one(zfs_handle_t *zhp, void *arg) 4313{ 4314 struct holdarg *ha = arg; 4315 char name[ZFS_MAXNAMELEN]; 4316 int rv = 0; 4317 4318 (void) snprintf(name, sizeof (name), 4319 "%s@%s", zhp->zfs_name, ha->snapname); 4320 4321 if (lzc_exists(name)) 4322 fnvlist_add_string(ha->nvl, name, ha->tag); 4323 4324 if (ha->recursive) 4325 rv = zfs_iter_filesystems(zhp, zfs_hold_one, ha); 4326 zfs_close(zhp); 4327 return (rv); 4328} 4329 4330int 4331zfs_hold(zfs_handle_t *zhp, const char *snapname, const char *tag, 4332 boolean_t recursive, int cleanup_fd) 4333{ 4334 int ret; 4335 struct holdarg ha; 4336 4337 ha.nvl = fnvlist_alloc(); 4338 ha.snapname = snapname; 4339 ha.tag = tag; 4340 ha.recursive = recursive; 4341 (void) zfs_hold_one(zfs_handle_dup(zhp), &ha); 4342 4343 if (nvlist_empty(ha.nvl)) { 4344 char errbuf[1024]; 4345 4346 fnvlist_free(ha.nvl); 4347 ret = ENOENT; 4348 (void) snprintf(errbuf, sizeof (errbuf), 4349 dgettext(TEXT_DOMAIN, 4350 "cannot hold snapshot '%s@%s'"), 4351 zhp->zfs_name, snapname); 4352 (void) zfs_standard_error(zhp->zfs_hdl, ret, errbuf); 4353 return (ret); 4354 } 4355 4356 ret = zfs_hold_nvl(zhp, cleanup_fd, ha.nvl); 4357 fnvlist_free(ha.nvl); 4358 4359 return (ret); 4360} 4361 4362int 4363zfs_hold_nvl(zfs_handle_t *zhp, int cleanup_fd, nvlist_t *holds) 4364{ 4365 int ret; 4366 nvlist_t *errors; 4367 libzfs_handle_t *hdl = zhp->zfs_hdl; 4368 char errbuf[1024]; 4369 nvpair_t *elem; 4370 4371 errors = NULL; 4372 ret = lzc_hold(holds, cleanup_fd, &errors); 4373 4374 if (ret == 0) { 4375 /* There may be errors even in the success case. */ 4376 fnvlist_free(errors); 4377 return (0); 4378 } 4379 4380 if (nvlist_empty(errors)) { 4381 /* no hold-specific errors */ 4382 (void) snprintf(errbuf, sizeof (errbuf), 4383 dgettext(TEXT_DOMAIN, "cannot hold")); 4384 switch (ret) { 4385 case ENOTSUP: 4386 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4387 "pool must be upgraded")); 4388 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf); 4389 break; 4390 case EINVAL: 4391 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf); 4392 break; 4393 default: 4394 (void) zfs_standard_error(hdl, ret, errbuf); 4395 } 4396 } 4397 4398 for (elem = nvlist_next_nvpair(errors, NULL); 4399 elem != NULL; 4400 elem = nvlist_next_nvpair(errors, elem)) { 4401 (void) snprintf(errbuf, sizeof (errbuf), 4402 dgettext(TEXT_DOMAIN, 4403 "cannot hold snapshot '%s'"), nvpair_name(elem)); 4404 switch (fnvpair_value_int32(elem)) { 4405 case E2BIG: 4406 /* 4407 * Temporary tags wind up having the ds object id 4408 * prepended. So even if we passed the length check 4409 * above, it's still possible for the tag to wind 4410 * up being slightly too long. 4411 */ 4412 (void) zfs_error(hdl, EZFS_TAGTOOLONG, errbuf); 4413 break; 4414 case EINVAL: 4415 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf); 4416 break; 4417 case EEXIST: 4418 (void) zfs_error(hdl, EZFS_REFTAG_HOLD, errbuf); 4419 break; 4420 default: 4421 (void) zfs_standard_error(hdl, 4422 fnvpair_value_int32(elem), errbuf); 4423 } 4424 } 4425 4426 fnvlist_free(errors); 4427 return (ret); 4428} 4429 4430static int 4431zfs_release_one(zfs_handle_t *zhp, void *arg) 4432{ 4433 struct holdarg *ha = arg; 4434 char name[ZFS_MAXNAMELEN]; 4435 int rv = 0; 4436 nvlist_t *existing_holds; 4437 4438 (void) snprintf(name, sizeof (name), 4439 "%s@%s", zhp->zfs_name, ha->snapname); 4440 4441 if (lzc_get_holds(name, &existing_holds) != 0) { 4442 ha->error = ENOENT; 4443 } else if (!nvlist_exists(existing_holds, ha->tag)) { 4444 ha->error = ESRCH; 4445 } else { 4446 nvlist_t *torelease = fnvlist_alloc(); 4447 fnvlist_add_boolean(torelease, ha->tag); 4448 fnvlist_add_nvlist(ha->nvl, name, torelease); 4449 fnvlist_free(torelease); 4450 } 4451 4452 if (ha->recursive) 4453 rv = zfs_iter_filesystems(zhp, zfs_release_one, ha); 4454 zfs_close(zhp); 4455 return (rv); 4456} 4457 4458int 4459zfs_release(zfs_handle_t *zhp, const char *snapname, const char *tag, 4460 boolean_t recursive) 4461{ 4462 int ret; 4463 struct holdarg ha; 4464 nvlist_t *errors = NULL; 4465 nvpair_t *elem; 4466 libzfs_handle_t *hdl = zhp->zfs_hdl; 4467 char errbuf[1024]; 4468 4469 ha.nvl = fnvlist_alloc(); 4470 ha.snapname = snapname; 4471 ha.tag = tag; 4472 ha.recursive = recursive; 4473 ha.error = 0; 4474 (void) zfs_release_one(zfs_handle_dup(zhp), &ha); 4475 4476 if (nvlist_empty(ha.nvl)) { 4477 fnvlist_free(ha.nvl); 4478 ret = ha.error; 4479 (void) snprintf(errbuf, sizeof (errbuf), 4480 dgettext(TEXT_DOMAIN, 4481 "cannot release hold from snapshot '%s@%s'"), 4482 zhp->zfs_name, snapname); 4483 if (ret == ESRCH) { 4484 (void) zfs_error(hdl, EZFS_REFTAG_RELE, errbuf); 4485 } else { 4486 (void) zfs_standard_error(hdl, ret, errbuf); 4487 } 4488 return (ret); 4489 } 4490 4491 ret = lzc_release(ha.nvl, &errors); 4492 fnvlist_free(ha.nvl); 4493 4494 if (ret == 0) { 4495 /* There may be errors even in the success case. */ 4496 fnvlist_free(errors); 4497 return (0); 4498 } 4499 4500 if (nvlist_empty(errors)) { 4501 /* no hold-specific errors */ 4502 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 4503 "cannot release")); 4504 switch (errno) { 4505 case ENOTSUP: 4506 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4507 "pool must be upgraded")); 4508 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf); 4509 break; 4510 default: 4511 (void) zfs_standard_error_fmt(hdl, errno, errbuf); 4512 } 4513 } 4514 4515 for (elem = nvlist_next_nvpair(errors, NULL); 4516 elem != NULL; 4517 elem = nvlist_next_nvpair(errors, elem)) { 4518 (void) snprintf(errbuf, sizeof (errbuf), 4519 dgettext(TEXT_DOMAIN, 4520 "cannot release hold from snapshot '%s'"), 4521 nvpair_name(elem)); 4522 switch (fnvpair_value_int32(elem)) { 4523 case ESRCH: 4524 (void) zfs_error(hdl, EZFS_REFTAG_RELE, errbuf); 4525 break; 4526 case EINVAL: 4527 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf); 4528 break; 4529 default: 4530 (void) zfs_standard_error_fmt(hdl, 4531 fnvpair_value_int32(elem), errbuf); 4532 } 4533 } 4534 4535 fnvlist_free(errors); 4536 return (ret); 4537} 4538 4539int 4540zfs_get_fsacl(zfs_handle_t *zhp, nvlist_t **nvl) 4541{ 4542 zfs_cmd_t zc = { 0 }; 4543 libzfs_handle_t *hdl = zhp->zfs_hdl; 4544 int nvsz = 2048; 4545 void *nvbuf; 4546 int err = 0; 4547 char errbuf[1024]; 4548 4549 assert(zhp->zfs_type == ZFS_TYPE_VOLUME || 4550 zhp->zfs_type == ZFS_TYPE_FILESYSTEM); 4551 4552tryagain: 4553 4554 nvbuf = malloc(nvsz); 4555 if (nvbuf == NULL) { 4556 err = (zfs_error(hdl, EZFS_NOMEM, strerror(errno))); 4557 goto out; 4558 } 4559 4560 zc.zc_nvlist_dst_size = nvsz; 4561 zc.zc_nvlist_dst = (uintptr_t)nvbuf; 4562 4563 (void) strlcpy(zc.zc_name, zhp->zfs_name, ZFS_MAXNAMELEN); 4564 4565 if (ioctl(hdl->libzfs_fd, ZFS_IOC_GET_FSACL, &zc) != 0) { 4566 (void) snprintf(errbuf, sizeof (errbuf), 4567 dgettext(TEXT_DOMAIN, "cannot get permissions on '%s'"), 4568 zc.zc_name); 4569 switch (errno) { 4570 case ENOMEM: 4571 free(nvbuf); 4572 nvsz = zc.zc_nvlist_dst_size; 4573 goto tryagain; 4574 4575 case ENOTSUP: 4576 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4577 "pool must be upgraded")); 4578 err = zfs_error(hdl, EZFS_BADVERSION, errbuf); 4579 break; 4580 case EINVAL: 4581 err = zfs_error(hdl, EZFS_BADTYPE, errbuf); 4582 break; 4583 case ENOENT: 4584 err = zfs_error(hdl, EZFS_NOENT, errbuf); 4585 break; 4586 default: 4587 err = zfs_standard_error_fmt(hdl, errno, errbuf); 4588 break; 4589 } 4590 } else { 4591 /* success */ 4592 int rc = nvlist_unpack(nvbuf, zc.zc_nvlist_dst_size, nvl, 0); 4593 if (rc) { 4594 (void) snprintf(errbuf, sizeof (errbuf), dgettext( 4595 TEXT_DOMAIN, "cannot get permissions on '%s'"), 4596 zc.zc_name); 4597 err = zfs_standard_error_fmt(hdl, rc, errbuf); 4598 } 4599 } 4600 4601 free(nvbuf); 4602out: 4603 return (err); 4604} 4605 4606int 4607zfs_set_fsacl(zfs_handle_t *zhp, boolean_t un, nvlist_t *nvl) 4608{ 4609 zfs_cmd_t zc = { 0 }; 4610 libzfs_handle_t *hdl = zhp->zfs_hdl; 4611 char *nvbuf; 4612 char errbuf[1024]; 4613 size_t nvsz; 4614 int err; 4615 4616 assert(zhp->zfs_type == ZFS_TYPE_VOLUME || 4617 zhp->zfs_type == ZFS_TYPE_FILESYSTEM); 4618 4619 err = nvlist_size(nvl, &nvsz, NV_ENCODE_NATIVE); 4620 assert(err == 0); 4621 4622 nvbuf = malloc(nvsz); 4623 4624 err = nvlist_pack(nvl, &nvbuf, &nvsz, NV_ENCODE_NATIVE, 0); 4625 assert(err == 0); 4626 4627 zc.zc_nvlist_src_size = nvsz; 4628 zc.zc_nvlist_src = (uintptr_t)nvbuf; 4629 zc.zc_perm_action = un; 4630 4631 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 4632 4633 if (zfs_ioctl(hdl, ZFS_IOC_SET_FSACL, &zc) != 0) { 4634 (void) snprintf(errbuf, sizeof (errbuf), 4635 dgettext(TEXT_DOMAIN, "cannot set permissions on '%s'"), 4636 zc.zc_name); 4637 switch (errno) { 4638 case ENOTSUP: 4639 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4640 "pool must be upgraded")); 4641 err = zfs_error(hdl, EZFS_BADVERSION, errbuf); 4642 break; 4643 case EINVAL: 4644 err = zfs_error(hdl, EZFS_BADTYPE, errbuf); 4645 break; 4646 case ENOENT: 4647 err = zfs_error(hdl, EZFS_NOENT, errbuf); 4648 break; 4649 default: 4650 err = zfs_standard_error_fmt(hdl, errno, errbuf); 4651 break; 4652 } 4653 } 4654 4655 free(nvbuf); 4656 4657 return (err); 4658} 4659 4660int 4661zfs_get_holds(zfs_handle_t *zhp, nvlist_t **nvl) 4662{ 4663 int err; 4664 char errbuf[1024]; 4665 4666 err = lzc_get_holds(zhp->zfs_name, nvl); 4667 4668 if (err != 0) { 4669 libzfs_handle_t *hdl = zhp->zfs_hdl; 4670 4671 (void) snprintf(errbuf, sizeof (errbuf), 4672 dgettext(TEXT_DOMAIN, "cannot get holds for '%s'"), 4673 zhp->zfs_name); 4674 switch (err) { 4675 case ENOTSUP: 4676 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4677 "pool must be upgraded")); 4678 err = zfs_error(hdl, EZFS_BADVERSION, errbuf); 4679 break; 4680 case EINVAL: 4681 err = zfs_error(hdl, EZFS_BADTYPE, errbuf); 4682 break; 4683 case ENOENT: 4684 err = zfs_error(hdl, EZFS_NOENT, errbuf); 4685 break; 4686 default: 4687 err = zfs_standard_error_fmt(hdl, errno, errbuf); 4688 break; 4689 } 4690 } 4691 4692 return (err); 4693} 4694 4695/* 4696 * Convert the zvol's volume size to an appropriate reservation. 4697 * Note: If this routine is updated, it is necessary to update the ZFS test 4698 * suite's shell version in reservation.kshlib. 4699 */ 4700uint64_t 4701zvol_volsize_to_reservation(uint64_t volsize, nvlist_t *props) 4702{ 4703 uint64_t numdb; 4704 uint64_t nblocks, volblocksize; 4705 int ncopies; 4706 char *strval; 4707 4708 if (nvlist_lookup_string(props, 4709 zfs_prop_to_name(ZFS_PROP_COPIES), &strval) == 0) 4710 ncopies = atoi(strval); 4711 else 4712 ncopies = 1; 4713 if (nvlist_lookup_uint64(props, 4714 zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE), 4715 &volblocksize) != 0) 4716 volblocksize = ZVOL_DEFAULT_BLOCKSIZE; 4717 nblocks = volsize/volblocksize; 4718 /* start with metadnode L0-L6 */ 4719 numdb = 7; 4720 /* calculate number of indirects */ 4721 while (nblocks > 1) { 4722 nblocks += DNODES_PER_LEVEL - 1; 4723 nblocks /= DNODES_PER_LEVEL; 4724 numdb += nblocks; 4725 } 4726 numdb *= MIN(SPA_DVAS_PER_BP, ncopies + 1); 4727 volsize *= ncopies; 4728 /* 4729 * this is exactly DN_MAX_INDBLKSHIFT when metadata isn't 4730 * compressed, but in practice they compress down to about 4731 * 1100 bytes 4732 */ 4733 numdb *= 1ULL << DN_MAX_INDBLKSHIFT; 4734 volsize += numdb; 4735 return (volsize); 4736} 4737 4738/* 4739 * Attach/detach the given filesystem to/from the given jail. 4740 */ 4741int 4742zfs_jail(zfs_handle_t *zhp, int jailid, int attach) 4743{ 4744 libzfs_handle_t *hdl = zhp->zfs_hdl; 4745 zfs_cmd_t zc = { 0 }; 4746 char errbuf[1024]; 4747 unsigned long cmd; 4748 int ret; 4749 4750 if (attach) { 4751 (void) snprintf(errbuf, sizeof (errbuf), 4752 dgettext(TEXT_DOMAIN, "cannot jail '%s'"), zhp->zfs_name); 4753 } else { 4754 (void) snprintf(errbuf, sizeof (errbuf), 4755 dgettext(TEXT_DOMAIN, "cannot unjail '%s'"), zhp->zfs_name); 4756 } 4757 4758 switch (zhp->zfs_type) { 4759 case ZFS_TYPE_VOLUME: 4760 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4761 "volumes can not be jailed")); 4762 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 4763 case ZFS_TYPE_SNAPSHOT: 4764 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4765 "snapshots can not be jailed")); 4766 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 4767 } 4768 assert(zhp->zfs_type == ZFS_TYPE_FILESYSTEM); 4769 4770 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 4771 zc.zc_objset_type = DMU_OST_ZFS; 4772 zc.zc_jailid = jailid; 4773 4774 cmd = attach ? ZFS_IOC_JAIL : ZFS_IOC_UNJAIL; 4775 if ((ret = ioctl(hdl->libzfs_fd, cmd, &zc)) != 0) 4776 zfs_standard_error(hdl, errno, errbuf); 4777 4778 return (ret); 4779} 4780