libzfs_dataset.c revision 265744
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) 2013 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_RECORDSIZE: 1084 case ZFS_PROP_VOLBLOCKSIZE: 1085 /* must be power of two within SPA_{MIN,MAX}BLOCKSIZE */ 1086 if (intval < SPA_MINBLOCKSIZE || 1087 intval > SPA_MAXBLOCKSIZE || !ISP2(intval)) { 1088 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1089 "'%s' must be power of 2 from %u " 1090 "to %uk"), propname, 1091 (uint_t)SPA_MINBLOCKSIZE, 1092 (uint_t)SPA_MAXBLOCKSIZE >> 10); 1093 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1094 goto error; 1095 } 1096 break; 1097 1098 case ZFS_PROP_MLSLABEL: 1099 { 1100#ifdef sun 1101 /* 1102 * Verify the mlslabel string and convert to 1103 * internal hex label string. 1104 */ 1105 1106 m_label_t *new_sl; 1107 char *hex = NULL; /* internal label string */ 1108 1109 /* Default value is already OK. */ 1110 if (strcasecmp(strval, ZFS_MLSLABEL_DEFAULT) == 0) 1111 break; 1112 1113 /* Verify the label can be converted to binary form */ 1114 if (((new_sl = m_label_alloc(MAC_LABEL)) == NULL) || 1115 (str_to_label(strval, &new_sl, MAC_LABEL, 1116 L_NO_CORRECTION, NULL) == -1)) { 1117 goto badlabel; 1118 } 1119 1120 /* Now translate to hex internal label string */ 1121 if (label_to_str(new_sl, &hex, M_INTERNAL, 1122 DEF_NAMES) != 0) { 1123 if (hex) 1124 free(hex); 1125 goto badlabel; 1126 } 1127 m_label_free(new_sl); 1128 1129 /* If string is already in internal form, we're done. */ 1130 if (strcmp(strval, hex) == 0) { 1131 free(hex); 1132 break; 1133 } 1134 1135 /* Replace the label string with the internal form. */ 1136 (void) nvlist_remove(ret, zfs_prop_to_name(prop), 1137 DATA_TYPE_STRING); 1138 verify(nvlist_add_string(ret, zfs_prop_to_name(prop), 1139 hex) == 0); 1140 free(hex); 1141 1142 break; 1143 1144badlabel: 1145 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1146 "invalid mlslabel '%s'"), strval); 1147 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1148 m_label_free(new_sl); /* OK if null */ 1149#else /* !sun */ 1150 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1151 "mlslabel is not supported on FreeBSD")); 1152 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1153#endif /* !sun */ 1154 goto error; 1155 1156 } 1157 1158 case ZFS_PROP_MOUNTPOINT: 1159 { 1160 namecheck_err_t why; 1161 1162 if (strcmp(strval, ZFS_MOUNTPOINT_NONE) == 0 || 1163 strcmp(strval, ZFS_MOUNTPOINT_LEGACY) == 0) 1164 break; 1165 1166 if (mountpoint_namecheck(strval, &why)) { 1167 switch (why) { 1168 case NAME_ERR_LEADING_SLASH: 1169 zfs_error_aux(hdl, 1170 dgettext(TEXT_DOMAIN, 1171 "'%s' must be an absolute path, " 1172 "'none', or 'legacy'"), propname); 1173 break; 1174 case NAME_ERR_TOOLONG: 1175 zfs_error_aux(hdl, 1176 dgettext(TEXT_DOMAIN, 1177 "component of '%s' is too long"), 1178 propname); 1179 break; 1180 } 1181 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1182 goto error; 1183 } 1184 } 1185 1186 /*FALLTHRU*/ 1187 1188 case ZFS_PROP_SHARESMB: 1189 case ZFS_PROP_SHARENFS: 1190 /* 1191 * For the mountpoint and sharenfs or sharesmb 1192 * properties, check if it can be set in a 1193 * global/non-global zone based on 1194 * the zoned property value: 1195 * 1196 * global zone non-global zone 1197 * -------------------------------------------------- 1198 * zoned=on mountpoint (no) mountpoint (yes) 1199 * sharenfs (no) sharenfs (no) 1200 * sharesmb (no) sharesmb (no) 1201 * 1202 * zoned=off mountpoint (yes) N/A 1203 * sharenfs (yes) 1204 * sharesmb (yes) 1205 */ 1206 if (zoned) { 1207 if (getzoneid() == GLOBAL_ZONEID) { 1208 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1209 "'%s' cannot be set on " 1210 "dataset in a non-global zone"), 1211 propname); 1212 (void) zfs_error(hdl, EZFS_ZONED, 1213 errbuf); 1214 goto error; 1215 } else if (prop == ZFS_PROP_SHARENFS || 1216 prop == ZFS_PROP_SHARESMB) { 1217 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1218 "'%s' cannot be set in " 1219 "a non-global zone"), propname); 1220 (void) zfs_error(hdl, EZFS_ZONED, 1221 errbuf); 1222 goto error; 1223 } 1224 } else if (getzoneid() != GLOBAL_ZONEID) { 1225 /* 1226 * If zoned property is 'off', this must be in 1227 * a global zone. If not, something is wrong. 1228 */ 1229 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1230 "'%s' cannot be set while dataset " 1231 "'zoned' property is set"), propname); 1232 (void) zfs_error(hdl, EZFS_ZONED, errbuf); 1233 goto error; 1234 } 1235 1236 /* 1237 * At this point, it is legitimate to set the 1238 * property. Now we want to make sure that the 1239 * property value is valid if it is sharenfs. 1240 */ 1241 if ((prop == ZFS_PROP_SHARENFS || 1242 prop == ZFS_PROP_SHARESMB) && 1243 strcmp(strval, "on") != 0 && 1244 strcmp(strval, "off") != 0) { 1245 zfs_share_proto_t proto; 1246 1247 if (prop == ZFS_PROP_SHARESMB) 1248 proto = PROTO_SMB; 1249 else 1250 proto = PROTO_NFS; 1251 1252 /* 1253 * Must be an valid sharing protocol 1254 * option string so init the libshare 1255 * in order to enable the parser and 1256 * then parse the options. We use the 1257 * control API since we don't care about 1258 * the current configuration and don't 1259 * want the overhead of loading it 1260 * until we actually do something. 1261 */ 1262 1263 if (zfs_init_libshare(hdl, 1264 SA_INIT_CONTROL_API) != SA_OK) { 1265 /* 1266 * An error occurred so we can't do 1267 * anything 1268 */ 1269 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1270 "'%s' cannot be set: problem " 1271 "in share initialization"), 1272 propname); 1273 (void) zfs_error(hdl, EZFS_BADPROP, 1274 errbuf); 1275 goto error; 1276 } 1277 1278 if (zfs_parse_options(strval, proto) != SA_OK) { 1279 /* 1280 * There was an error in parsing so 1281 * deal with it by issuing an error 1282 * message and leaving after 1283 * uninitializing the the libshare 1284 * interface. 1285 */ 1286 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1287 "'%s' cannot be set to invalid " 1288 "options"), propname); 1289 (void) zfs_error(hdl, EZFS_BADPROP, 1290 errbuf); 1291 zfs_uninit_libshare(hdl); 1292 goto error; 1293 } 1294 zfs_uninit_libshare(hdl); 1295 } 1296 1297 break; 1298 case ZFS_PROP_UTF8ONLY: 1299 chosen_utf = (int)intval; 1300 break; 1301 case ZFS_PROP_NORMALIZE: 1302 chosen_normal = (int)intval; 1303 break; 1304 } 1305 1306 /* 1307 * For changes to existing volumes, we have some additional 1308 * checks to enforce. 1309 */ 1310 if (type == ZFS_TYPE_VOLUME && zhp != NULL) { 1311 uint64_t volsize = zfs_prop_get_int(zhp, 1312 ZFS_PROP_VOLSIZE); 1313 uint64_t blocksize = zfs_prop_get_int(zhp, 1314 ZFS_PROP_VOLBLOCKSIZE); 1315 char buf[64]; 1316 1317 switch (prop) { 1318 case ZFS_PROP_RESERVATION: 1319 case ZFS_PROP_REFRESERVATION: 1320 if (intval > volsize) { 1321 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1322 "'%s' is greater than current " 1323 "volume size"), propname); 1324 (void) zfs_error(hdl, EZFS_BADPROP, 1325 errbuf); 1326 goto error; 1327 } 1328 break; 1329 1330 case ZFS_PROP_VOLSIZE: 1331 if (intval % blocksize != 0) { 1332 zfs_nicenum(blocksize, buf, 1333 sizeof (buf)); 1334 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1335 "'%s' must be a multiple of " 1336 "volume block size (%s)"), 1337 propname, buf); 1338 (void) zfs_error(hdl, EZFS_BADPROP, 1339 errbuf); 1340 goto error; 1341 } 1342 1343 if (intval == 0) { 1344 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1345 "'%s' cannot be zero"), 1346 propname); 1347 (void) zfs_error(hdl, EZFS_BADPROP, 1348 errbuf); 1349 goto error; 1350 } 1351 break; 1352 } 1353 } 1354 } 1355 1356 /* 1357 * If normalization was chosen, but no UTF8 choice was made, 1358 * enforce rejection of non-UTF8 names. 1359 * 1360 * If normalization was chosen, but rejecting non-UTF8 names 1361 * was explicitly not chosen, it is an error. 1362 */ 1363 if (chosen_normal > 0 && chosen_utf < 0) { 1364 if (nvlist_add_uint64(ret, 1365 zfs_prop_to_name(ZFS_PROP_UTF8ONLY), 1) != 0) { 1366 (void) no_memory(hdl); 1367 goto error; 1368 } 1369 } else if (chosen_normal > 0 && chosen_utf == 0) { 1370 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1371 "'%s' must be set 'on' if normalization chosen"), 1372 zfs_prop_to_name(ZFS_PROP_UTF8ONLY)); 1373 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1374 goto error; 1375 } 1376 return (ret); 1377 1378error: 1379 nvlist_free(ret); 1380 return (NULL); 1381} 1382 1383int 1384zfs_add_synthetic_resv(zfs_handle_t *zhp, nvlist_t *nvl) 1385{ 1386 uint64_t old_volsize; 1387 uint64_t new_volsize; 1388 uint64_t old_reservation; 1389 uint64_t new_reservation; 1390 zfs_prop_t resv_prop; 1391 1392 /* 1393 * If this is an existing volume, and someone is setting the volsize, 1394 * make sure that it matches the reservation, or add it if necessary. 1395 */ 1396 old_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE); 1397 if (zfs_which_resv_prop(zhp, &resv_prop) < 0) 1398 return (-1); 1399 old_reservation = zfs_prop_get_int(zhp, resv_prop); 1400 if ((zvol_volsize_to_reservation(old_volsize, zhp->zfs_props) != 1401 old_reservation) || nvlist_lookup_uint64(nvl, 1402 zfs_prop_to_name(resv_prop), &new_reservation) != ENOENT) { 1403 return (0); 1404 } 1405 if (nvlist_lookup_uint64(nvl, zfs_prop_to_name(ZFS_PROP_VOLSIZE), 1406 &new_volsize) != 0) 1407 return (-1); 1408 new_reservation = zvol_volsize_to_reservation(new_volsize, 1409 zhp->zfs_props); 1410 if (nvlist_add_uint64(nvl, zfs_prop_to_name(resv_prop), 1411 new_reservation) != 0) { 1412 (void) no_memory(zhp->zfs_hdl); 1413 return (-1); 1414 } 1415 return (1); 1416} 1417 1418void 1419zfs_setprop_error(libzfs_handle_t *hdl, zfs_prop_t prop, int err, 1420 char *errbuf) 1421{ 1422 switch (err) { 1423 1424 case ENOSPC: 1425 /* 1426 * For quotas and reservations, ENOSPC indicates 1427 * something different; setting a quota or reservation 1428 * doesn't use any disk space. 1429 */ 1430 switch (prop) { 1431 case ZFS_PROP_QUOTA: 1432 case ZFS_PROP_REFQUOTA: 1433 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1434 "size is less than current used or " 1435 "reserved space")); 1436 (void) zfs_error(hdl, EZFS_PROPSPACE, errbuf); 1437 break; 1438 1439 case ZFS_PROP_RESERVATION: 1440 case ZFS_PROP_REFRESERVATION: 1441 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1442 "size is greater than available space")); 1443 (void) zfs_error(hdl, EZFS_PROPSPACE, errbuf); 1444 break; 1445 1446 default: 1447 (void) zfs_standard_error(hdl, err, errbuf); 1448 break; 1449 } 1450 break; 1451 1452 case EBUSY: 1453 (void) zfs_standard_error(hdl, EBUSY, errbuf); 1454 break; 1455 1456 case EROFS: 1457 (void) zfs_error(hdl, EZFS_DSREADONLY, errbuf); 1458 break; 1459 1460 case ENOTSUP: 1461 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1462 "pool and or dataset must be upgraded to set this " 1463 "property or value")); 1464 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf); 1465 break; 1466 1467 case ERANGE: 1468 if (prop == ZFS_PROP_COMPRESSION) { 1469 (void) zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1470 "property setting is not allowed on " 1471 "bootable datasets")); 1472 (void) zfs_error(hdl, EZFS_NOTSUP, errbuf); 1473 } else { 1474 (void) zfs_standard_error(hdl, err, errbuf); 1475 } 1476 break; 1477 1478 case EINVAL: 1479 if (prop == ZPROP_INVAL) { 1480 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1481 } else { 1482 (void) zfs_standard_error(hdl, err, errbuf); 1483 } 1484 break; 1485 1486 case EOVERFLOW: 1487 /* 1488 * This platform can't address a volume this big. 1489 */ 1490#ifdef _ILP32 1491 if (prop == ZFS_PROP_VOLSIZE) { 1492 (void) zfs_error(hdl, EZFS_VOLTOOBIG, errbuf); 1493 break; 1494 } 1495#endif 1496 /* FALLTHROUGH */ 1497 default: 1498 (void) zfs_standard_error(hdl, err, errbuf); 1499 } 1500} 1501 1502/* 1503 * Given a property name and value, set the property for the given dataset. 1504 */ 1505int 1506zfs_prop_set(zfs_handle_t *zhp, const char *propname, const char *propval) 1507{ 1508 zfs_cmd_t zc = { 0 }; 1509 int ret = -1; 1510 prop_changelist_t *cl = NULL; 1511 char errbuf[1024]; 1512 libzfs_handle_t *hdl = zhp->zfs_hdl; 1513 nvlist_t *nvl = NULL, *realprops; 1514 zfs_prop_t prop; 1515 boolean_t do_prefix = B_TRUE; 1516 int added_resv; 1517 1518 (void) snprintf(errbuf, sizeof (errbuf), 1519 dgettext(TEXT_DOMAIN, "cannot set property for '%s'"), 1520 zhp->zfs_name); 1521 1522 if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0 || 1523 nvlist_add_string(nvl, propname, propval) != 0) { 1524 (void) no_memory(hdl); 1525 goto error; 1526 } 1527 1528 if ((realprops = zfs_valid_proplist(hdl, zhp->zfs_type, nvl, 1529 zfs_prop_get_int(zhp, ZFS_PROP_ZONED), zhp, errbuf)) == NULL) 1530 goto error; 1531 1532 nvlist_free(nvl); 1533 nvl = realprops; 1534 1535 prop = zfs_name_to_prop(propname); 1536 1537 /* We don't support those properties on FreeBSD. */ 1538 switch (prop) { 1539 case ZFS_PROP_DEVICES: 1540 case ZFS_PROP_ISCSIOPTIONS: 1541 case ZFS_PROP_XATTR: 1542 case ZFS_PROP_VSCAN: 1543 case ZFS_PROP_NBMAND: 1544 case ZFS_PROP_MLSLABEL: 1545 (void) snprintf(errbuf, sizeof (errbuf), 1546 "property '%s' not supported on FreeBSD", propname); 1547 ret = zfs_error(hdl, EZFS_PERM, errbuf); 1548 goto error; 1549 } 1550 1551 if (prop == ZFS_PROP_VOLSIZE) { 1552 if ((added_resv = zfs_add_synthetic_resv(zhp, nvl)) == -1) 1553 goto error; 1554 } 1555 1556 if ((cl = changelist_gather(zhp, prop, 0, 0)) == NULL) 1557 goto error; 1558 1559 if (prop == ZFS_PROP_MOUNTPOINT && changelist_haszonedchild(cl)) { 1560 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1561 "child dataset with inherited mountpoint is used " 1562 "in a non-global zone")); 1563 ret = zfs_error(hdl, EZFS_ZONED, errbuf); 1564 goto error; 1565 } 1566 1567 /* 1568 * We don't want to unmount & remount the dataset when changing 1569 * its canmount property to 'on' or 'noauto'. We only use 1570 * the changelist logic to unmount when setting canmount=off. 1571 */ 1572 if (prop == ZFS_PROP_CANMOUNT) { 1573 uint64_t idx; 1574 int err = zprop_string_to_index(prop, propval, &idx, 1575 ZFS_TYPE_DATASET); 1576 if (err == 0 && idx != ZFS_CANMOUNT_OFF) 1577 do_prefix = B_FALSE; 1578 } 1579 1580 if (do_prefix && (ret = changelist_prefix(cl)) != 0) 1581 goto error; 1582 1583 /* 1584 * Execute the corresponding ioctl() to set this property. 1585 */ 1586 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 1587 1588 if (zcmd_write_src_nvlist(hdl, &zc, nvl) != 0) 1589 goto error; 1590 1591 ret = zfs_ioctl(hdl, ZFS_IOC_SET_PROP, &zc); 1592 1593 if (ret != 0) { 1594 zfs_setprop_error(hdl, prop, errno, errbuf); 1595 if (added_resv && errno == ENOSPC) { 1596 /* clean up the volsize property we tried to set */ 1597 uint64_t old_volsize = zfs_prop_get_int(zhp, 1598 ZFS_PROP_VOLSIZE); 1599 nvlist_free(nvl); 1600 zcmd_free_nvlists(&zc); 1601 if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0) 1602 goto error; 1603 if (nvlist_add_uint64(nvl, 1604 zfs_prop_to_name(ZFS_PROP_VOLSIZE), 1605 old_volsize) != 0) 1606 goto error; 1607 if (zcmd_write_src_nvlist(hdl, &zc, nvl) != 0) 1608 goto error; 1609 (void) zfs_ioctl(hdl, ZFS_IOC_SET_PROP, &zc); 1610 } 1611 } else { 1612 if (do_prefix) 1613 ret = changelist_postfix(cl); 1614 1615 /* 1616 * Refresh the statistics so the new property value 1617 * is reflected. 1618 */ 1619 if (ret == 0) 1620 (void) get_stats(zhp); 1621 } 1622 1623error: 1624 nvlist_free(nvl); 1625 zcmd_free_nvlists(&zc); 1626 if (cl) 1627 changelist_free(cl); 1628 return (ret); 1629} 1630 1631/* 1632 * Given a property, inherit the value from the parent dataset, or if received 1633 * is TRUE, revert to the received value, if any. 1634 */ 1635int 1636zfs_prop_inherit(zfs_handle_t *zhp, const char *propname, boolean_t received) 1637{ 1638 zfs_cmd_t zc = { 0 }; 1639 int ret; 1640 prop_changelist_t *cl; 1641 libzfs_handle_t *hdl = zhp->zfs_hdl; 1642 char errbuf[1024]; 1643 zfs_prop_t prop; 1644 1645 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 1646 "cannot inherit %s for '%s'"), propname, zhp->zfs_name); 1647 1648 zc.zc_cookie = received; 1649 if ((prop = zfs_name_to_prop(propname)) == ZPROP_INVAL) { 1650 /* 1651 * For user properties, the amount of work we have to do is very 1652 * small, so just do it here. 1653 */ 1654 if (!zfs_prop_user(propname)) { 1655 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1656 "invalid property")); 1657 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 1658 } 1659 1660 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 1661 (void) strlcpy(zc.zc_value, propname, sizeof (zc.zc_value)); 1662 1663 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_INHERIT_PROP, &zc) != 0) 1664 return (zfs_standard_error(hdl, errno, errbuf)); 1665 1666 return (0); 1667 } 1668 1669 /* 1670 * Verify that this property is inheritable. 1671 */ 1672 if (zfs_prop_readonly(prop)) 1673 return (zfs_error(hdl, EZFS_PROPREADONLY, errbuf)); 1674 1675 if (!zfs_prop_inheritable(prop) && !received) 1676 return (zfs_error(hdl, EZFS_PROPNONINHERIT, errbuf)); 1677 1678 /* 1679 * Check to see if the value applies to this type 1680 */ 1681 if (!zfs_prop_valid_for_type(prop, zhp->zfs_type)) 1682 return (zfs_error(hdl, EZFS_PROPTYPE, errbuf)); 1683 1684 /* 1685 * Normalize the name, to get rid of shorthand abbreviations. 1686 */ 1687 propname = zfs_prop_to_name(prop); 1688 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 1689 (void) strlcpy(zc.zc_value, propname, sizeof (zc.zc_value)); 1690 1691 if (prop == ZFS_PROP_MOUNTPOINT && getzoneid() == GLOBAL_ZONEID && 1692 zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) { 1693 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1694 "dataset is used in a non-global zone")); 1695 return (zfs_error(hdl, EZFS_ZONED, errbuf)); 1696 } 1697 1698 /* 1699 * Determine datasets which will be affected by this change, if any. 1700 */ 1701 if ((cl = changelist_gather(zhp, prop, 0, 0)) == NULL) 1702 return (-1); 1703 1704 if (prop == ZFS_PROP_MOUNTPOINT && changelist_haszonedchild(cl)) { 1705 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1706 "child dataset with inherited mountpoint is used " 1707 "in a non-global zone")); 1708 ret = zfs_error(hdl, EZFS_ZONED, errbuf); 1709 goto error; 1710 } 1711 1712 if ((ret = changelist_prefix(cl)) != 0) 1713 goto error; 1714 1715 if ((ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_INHERIT_PROP, &zc)) != 0) { 1716 return (zfs_standard_error(hdl, errno, errbuf)); 1717 } else { 1718 1719 if ((ret = changelist_postfix(cl)) != 0) 1720 goto error; 1721 1722 /* 1723 * Refresh the statistics so the new property is reflected. 1724 */ 1725 (void) get_stats(zhp); 1726 } 1727 1728error: 1729 changelist_free(cl); 1730 return (ret); 1731} 1732 1733/* 1734 * True DSL properties are stored in an nvlist. The following two functions 1735 * extract them appropriately. 1736 */ 1737static uint64_t 1738getprop_uint64(zfs_handle_t *zhp, zfs_prop_t prop, char **source) 1739{ 1740 nvlist_t *nv; 1741 uint64_t value; 1742 1743 *source = NULL; 1744 if (nvlist_lookup_nvlist(zhp->zfs_props, 1745 zfs_prop_to_name(prop), &nv) == 0) { 1746 verify(nvlist_lookup_uint64(nv, ZPROP_VALUE, &value) == 0); 1747 (void) nvlist_lookup_string(nv, ZPROP_SOURCE, source); 1748 } else { 1749 verify(!zhp->zfs_props_table || 1750 zhp->zfs_props_table[prop] == B_TRUE); 1751 value = zfs_prop_default_numeric(prop); 1752 *source = ""; 1753 } 1754 1755 return (value); 1756} 1757 1758static char * 1759getprop_string(zfs_handle_t *zhp, zfs_prop_t prop, char **source) 1760{ 1761 nvlist_t *nv; 1762 char *value; 1763 1764 *source = NULL; 1765 if (nvlist_lookup_nvlist(zhp->zfs_props, 1766 zfs_prop_to_name(prop), &nv) == 0) { 1767 verify(nvlist_lookup_string(nv, ZPROP_VALUE, &value) == 0); 1768 (void) nvlist_lookup_string(nv, ZPROP_SOURCE, source); 1769 } else { 1770 verify(!zhp->zfs_props_table || 1771 zhp->zfs_props_table[prop] == B_TRUE); 1772 if ((value = (char *)zfs_prop_default_string(prop)) == NULL) 1773 value = ""; 1774 *source = ""; 1775 } 1776 1777 return (value); 1778} 1779 1780static boolean_t 1781zfs_is_recvd_props_mode(zfs_handle_t *zhp) 1782{ 1783 return (zhp->zfs_props == zhp->zfs_recvd_props); 1784} 1785 1786static void 1787zfs_set_recvd_props_mode(zfs_handle_t *zhp, uint64_t *cookie) 1788{ 1789 *cookie = (uint64_t)(uintptr_t)zhp->zfs_props; 1790 zhp->zfs_props = zhp->zfs_recvd_props; 1791} 1792 1793static void 1794zfs_unset_recvd_props_mode(zfs_handle_t *zhp, uint64_t *cookie) 1795{ 1796 zhp->zfs_props = (nvlist_t *)(uintptr_t)*cookie; 1797 *cookie = 0; 1798} 1799 1800/* 1801 * Internal function for getting a numeric property. Both zfs_prop_get() and 1802 * zfs_prop_get_int() are built using this interface. 1803 * 1804 * Certain properties can be overridden using 'mount -o'. In this case, scan 1805 * the contents of the /etc/mnttab entry, searching for the appropriate options. 1806 * If they differ from the on-disk values, report the current values and mark 1807 * the source "temporary". 1808 */ 1809static int 1810get_numeric_property(zfs_handle_t *zhp, zfs_prop_t prop, zprop_source_t *src, 1811 char **source, uint64_t *val) 1812{ 1813 zfs_cmd_t zc = { 0 }; 1814 nvlist_t *zplprops = NULL; 1815 struct mnttab mnt; 1816 char *mntopt_on = NULL; 1817 char *mntopt_off = NULL; 1818 boolean_t received = zfs_is_recvd_props_mode(zhp); 1819 1820 *source = NULL; 1821 1822 switch (prop) { 1823 case ZFS_PROP_ATIME: 1824 mntopt_on = MNTOPT_ATIME; 1825 mntopt_off = MNTOPT_NOATIME; 1826 break; 1827 1828 case ZFS_PROP_DEVICES: 1829 mntopt_on = MNTOPT_DEVICES; 1830 mntopt_off = MNTOPT_NODEVICES; 1831 break; 1832 1833 case ZFS_PROP_EXEC: 1834 mntopt_on = MNTOPT_EXEC; 1835 mntopt_off = MNTOPT_NOEXEC; 1836 break; 1837 1838 case ZFS_PROP_READONLY: 1839 mntopt_on = MNTOPT_RO; 1840 mntopt_off = MNTOPT_RW; 1841 break; 1842 1843 case ZFS_PROP_SETUID: 1844 mntopt_on = MNTOPT_SETUID; 1845 mntopt_off = MNTOPT_NOSETUID; 1846 break; 1847 1848 case ZFS_PROP_XATTR: 1849 mntopt_on = MNTOPT_XATTR; 1850 mntopt_off = MNTOPT_NOXATTR; 1851 break; 1852 1853 case ZFS_PROP_NBMAND: 1854 mntopt_on = MNTOPT_NBMAND; 1855 mntopt_off = MNTOPT_NONBMAND; 1856 break; 1857 } 1858 1859 /* 1860 * Because looking up the mount options is potentially expensive 1861 * (iterating over all of /etc/mnttab), we defer its calculation until 1862 * we're looking up a property which requires its presence. 1863 */ 1864 if (!zhp->zfs_mntcheck && 1865 (mntopt_on != NULL || prop == ZFS_PROP_MOUNTED)) { 1866 libzfs_handle_t *hdl = zhp->zfs_hdl; 1867 struct mnttab entry; 1868 1869 if (libzfs_mnttab_find(hdl, zhp->zfs_name, &entry) == 0) { 1870 zhp->zfs_mntopts = zfs_strdup(hdl, 1871 entry.mnt_mntopts); 1872 if (zhp->zfs_mntopts == NULL) 1873 return (-1); 1874 } 1875 1876 zhp->zfs_mntcheck = B_TRUE; 1877 } 1878 1879 if (zhp->zfs_mntopts == NULL) 1880 mnt.mnt_mntopts = ""; 1881 else 1882 mnt.mnt_mntopts = zhp->zfs_mntopts; 1883 1884 switch (prop) { 1885 case ZFS_PROP_ATIME: 1886 case ZFS_PROP_DEVICES: 1887 case ZFS_PROP_EXEC: 1888 case ZFS_PROP_READONLY: 1889 case ZFS_PROP_SETUID: 1890 case ZFS_PROP_XATTR: 1891 case ZFS_PROP_NBMAND: 1892 *val = getprop_uint64(zhp, prop, source); 1893 1894 if (received) 1895 break; 1896 1897 if (hasmntopt(&mnt, mntopt_on) && !*val) { 1898 *val = B_TRUE; 1899 if (src) 1900 *src = ZPROP_SRC_TEMPORARY; 1901 } else if (hasmntopt(&mnt, mntopt_off) && *val) { 1902 *val = B_FALSE; 1903 if (src) 1904 *src = ZPROP_SRC_TEMPORARY; 1905 } 1906 break; 1907 1908 case ZFS_PROP_CANMOUNT: 1909 case ZFS_PROP_VOLSIZE: 1910 case ZFS_PROP_QUOTA: 1911 case ZFS_PROP_REFQUOTA: 1912 case ZFS_PROP_RESERVATION: 1913 case ZFS_PROP_REFRESERVATION: 1914 case ZFS_PROP_FILESYSTEM_LIMIT: 1915 case ZFS_PROP_SNAPSHOT_LIMIT: 1916 case ZFS_PROP_FILESYSTEM_COUNT: 1917 case ZFS_PROP_SNAPSHOT_COUNT: 1918 *val = getprop_uint64(zhp, prop, source); 1919 1920 if (*source == NULL) { 1921 /* not default, must be local */ 1922 *source = zhp->zfs_name; 1923 } 1924 break; 1925 1926 case ZFS_PROP_MOUNTED: 1927 *val = (zhp->zfs_mntopts != NULL); 1928 break; 1929 1930 case ZFS_PROP_NUMCLONES: 1931 *val = zhp->zfs_dmustats.dds_num_clones; 1932 break; 1933 1934 case ZFS_PROP_VERSION: 1935 case ZFS_PROP_NORMALIZE: 1936 case ZFS_PROP_UTF8ONLY: 1937 case ZFS_PROP_CASE: 1938 if (!zfs_prop_valid_for_type(prop, zhp->zfs_head_type) || 1939 zcmd_alloc_dst_nvlist(zhp->zfs_hdl, &zc, 0) != 0) 1940 return (-1); 1941 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 1942 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_OBJSET_ZPLPROPS, &zc)) { 1943 zcmd_free_nvlists(&zc); 1944 return (-1); 1945 } 1946 if (zcmd_read_dst_nvlist(zhp->zfs_hdl, &zc, &zplprops) != 0 || 1947 nvlist_lookup_uint64(zplprops, zfs_prop_to_name(prop), 1948 val) != 0) { 1949 zcmd_free_nvlists(&zc); 1950 return (-1); 1951 } 1952 if (zplprops) 1953 nvlist_free(zplprops); 1954 zcmd_free_nvlists(&zc); 1955 break; 1956 1957 case ZFS_PROP_INCONSISTENT: 1958 *val = zhp->zfs_dmustats.dds_inconsistent; 1959 break; 1960 1961 default: 1962 switch (zfs_prop_get_type(prop)) { 1963 case PROP_TYPE_NUMBER: 1964 case PROP_TYPE_INDEX: 1965 *val = getprop_uint64(zhp, prop, source); 1966 /* 1967 * If we tried to use a default value for a 1968 * readonly property, it means that it was not 1969 * present. 1970 */ 1971 if (zfs_prop_readonly(prop) && 1972 *source != NULL && (*source)[0] == '\0') { 1973 *source = NULL; 1974 } 1975 break; 1976 1977 case PROP_TYPE_STRING: 1978 default: 1979 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN, 1980 "cannot get non-numeric property")); 1981 return (zfs_error(zhp->zfs_hdl, EZFS_BADPROP, 1982 dgettext(TEXT_DOMAIN, "internal error"))); 1983 } 1984 } 1985 1986 return (0); 1987} 1988 1989/* 1990 * Calculate the source type, given the raw source string. 1991 */ 1992static void 1993get_source(zfs_handle_t *zhp, zprop_source_t *srctype, char *source, 1994 char *statbuf, size_t statlen) 1995{ 1996 if (statbuf == NULL || *srctype == ZPROP_SRC_TEMPORARY) 1997 return; 1998 1999 if (source == NULL) { 2000 *srctype = ZPROP_SRC_NONE; 2001 } else if (source[0] == '\0') { 2002 *srctype = ZPROP_SRC_DEFAULT; 2003 } else if (strstr(source, ZPROP_SOURCE_VAL_RECVD) != NULL) { 2004 *srctype = ZPROP_SRC_RECEIVED; 2005 } else { 2006 if (strcmp(source, zhp->zfs_name) == 0) { 2007 *srctype = ZPROP_SRC_LOCAL; 2008 } else { 2009 (void) strlcpy(statbuf, source, statlen); 2010 *srctype = ZPROP_SRC_INHERITED; 2011 } 2012 } 2013 2014} 2015 2016int 2017zfs_prop_get_recvd(zfs_handle_t *zhp, const char *propname, char *propbuf, 2018 size_t proplen, boolean_t literal) 2019{ 2020 zfs_prop_t prop; 2021 int err = 0; 2022 2023 if (zhp->zfs_recvd_props == NULL) 2024 if (get_recvd_props_ioctl(zhp) != 0) 2025 return (-1); 2026 2027 prop = zfs_name_to_prop(propname); 2028 2029 if (prop != ZPROP_INVAL) { 2030 uint64_t cookie; 2031 if (!nvlist_exists(zhp->zfs_recvd_props, propname)) 2032 return (-1); 2033 zfs_set_recvd_props_mode(zhp, &cookie); 2034 err = zfs_prop_get(zhp, prop, propbuf, proplen, 2035 NULL, NULL, 0, literal); 2036 zfs_unset_recvd_props_mode(zhp, &cookie); 2037 } else { 2038 nvlist_t *propval; 2039 char *recvdval; 2040 if (nvlist_lookup_nvlist(zhp->zfs_recvd_props, 2041 propname, &propval) != 0) 2042 return (-1); 2043 verify(nvlist_lookup_string(propval, ZPROP_VALUE, 2044 &recvdval) == 0); 2045 (void) strlcpy(propbuf, recvdval, proplen); 2046 } 2047 2048 return (err == 0 ? 0 : -1); 2049} 2050 2051static int 2052get_clones_string(zfs_handle_t *zhp, char *propbuf, size_t proplen) 2053{ 2054 nvlist_t *value; 2055 nvpair_t *pair; 2056 2057 value = zfs_get_clones_nvl(zhp); 2058 if (value == NULL) 2059 return (-1); 2060 2061 propbuf[0] = '\0'; 2062 for (pair = nvlist_next_nvpair(value, NULL); pair != NULL; 2063 pair = nvlist_next_nvpair(value, pair)) { 2064 if (propbuf[0] != '\0') 2065 (void) strlcat(propbuf, ",", proplen); 2066 (void) strlcat(propbuf, nvpair_name(pair), proplen); 2067 } 2068 2069 return (0); 2070} 2071 2072struct get_clones_arg { 2073 uint64_t numclones; 2074 nvlist_t *value; 2075 const char *origin; 2076 char buf[ZFS_MAXNAMELEN]; 2077}; 2078 2079int 2080get_clones_cb(zfs_handle_t *zhp, void *arg) 2081{ 2082 struct get_clones_arg *gca = arg; 2083 2084 if (gca->numclones == 0) { 2085 zfs_close(zhp); 2086 return (0); 2087 } 2088 2089 if (zfs_prop_get(zhp, ZFS_PROP_ORIGIN, gca->buf, sizeof (gca->buf), 2090 NULL, NULL, 0, B_TRUE) != 0) 2091 goto out; 2092 if (strcmp(gca->buf, gca->origin) == 0) { 2093 fnvlist_add_boolean(gca->value, zfs_get_name(zhp)); 2094 gca->numclones--; 2095 } 2096 2097out: 2098 (void) zfs_iter_children(zhp, get_clones_cb, gca); 2099 zfs_close(zhp); 2100 return (0); 2101} 2102 2103nvlist_t * 2104zfs_get_clones_nvl(zfs_handle_t *zhp) 2105{ 2106 nvlist_t *nv, *value; 2107 2108 if (nvlist_lookup_nvlist(zhp->zfs_props, 2109 zfs_prop_to_name(ZFS_PROP_CLONES), &nv) != 0) { 2110 struct get_clones_arg gca; 2111 2112 /* 2113 * if this is a snapshot, then the kernel wasn't able 2114 * to get the clones. Do it by slowly iterating. 2115 */ 2116 if (zhp->zfs_type != ZFS_TYPE_SNAPSHOT) 2117 return (NULL); 2118 if (nvlist_alloc(&nv, NV_UNIQUE_NAME, 0) != 0) 2119 return (NULL); 2120 if (nvlist_alloc(&value, NV_UNIQUE_NAME, 0) != 0) { 2121 nvlist_free(nv); 2122 return (NULL); 2123 } 2124 2125 gca.numclones = zfs_prop_get_int(zhp, ZFS_PROP_NUMCLONES); 2126 gca.value = value; 2127 gca.origin = zhp->zfs_name; 2128 2129 if (gca.numclones != 0) { 2130 zfs_handle_t *root; 2131 char pool[ZFS_MAXNAMELEN]; 2132 char *cp = pool; 2133 2134 /* get the pool name */ 2135 (void) strlcpy(pool, zhp->zfs_name, sizeof (pool)); 2136 (void) strsep(&cp, "/@"); 2137 root = zfs_open(zhp->zfs_hdl, pool, 2138 ZFS_TYPE_FILESYSTEM); 2139 2140 (void) get_clones_cb(root, &gca); 2141 } 2142 2143 if (gca.numclones != 0 || 2144 nvlist_add_nvlist(nv, ZPROP_VALUE, value) != 0 || 2145 nvlist_add_nvlist(zhp->zfs_props, 2146 zfs_prop_to_name(ZFS_PROP_CLONES), nv) != 0) { 2147 nvlist_free(nv); 2148 nvlist_free(value); 2149 return (NULL); 2150 } 2151 nvlist_free(nv); 2152 nvlist_free(value); 2153 verify(0 == nvlist_lookup_nvlist(zhp->zfs_props, 2154 zfs_prop_to_name(ZFS_PROP_CLONES), &nv)); 2155 } 2156 2157 verify(nvlist_lookup_nvlist(nv, ZPROP_VALUE, &value) == 0); 2158 2159 return (value); 2160} 2161 2162/* 2163 * Retrieve a property from the given object. If 'literal' is specified, then 2164 * numbers are left as exact values. Otherwise, numbers are converted to a 2165 * human-readable form. 2166 * 2167 * Returns 0 on success, or -1 on error. 2168 */ 2169int 2170zfs_prop_get(zfs_handle_t *zhp, zfs_prop_t prop, char *propbuf, size_t proplen, 2171 zprop_source_t *src, char *statbuf, size_t statlen, boolean_t literal) 2172{ 2173 char *source = NULL; 2174 uint64_t val; 2175 char *str; 2176 const char *strval; 2177 boolean_t received = zfs_is_recvd_props_mode(zhp); 2178 2179 /* 2180 * Check to see if this property applies to our object 2181 */ 2182 if (!zfs_prop_valid_for_type(prop, zhp->zfs_type)) 2183 return (-1); 2184 2185 if (received && zfs_prop_readonly(prop)) 2186 return (-1); 2187 2188 if (src) 2189 *src = ZPROP_SRC_NONE; 2190 2191 switch (prop) { 2192 case ZFS_PROP_CREATION: 2193 /* 2194 * 'creation' is a time_t stored in the statistics. We convert 2195 * this into a string unless 'literal' is specified. 2196 */ 2197 { 2198 val = getprop_uint64(zhp, prop, &source); 2199 time_t time = (time_t)val; 2200 struct tm t; 2201 2202 if (literal || 2203 localtime_r(&time, &t) == NULL || 2204 strftime(propbuf, proplen, "%a %b %e %k:%M %Y", 2205 &t) == 0) 2206 (void) snprintf(propbuf, proplen, "%llu", val); 2207 } 2208 break; 2209 2210 case ZFS_PROP_MOUNTPOINT: 2211 /* 2212 * Getting the precise mountpoint can be tricky. 2213 * 2214 * - for 'none' or 'legacy', return those values. 2215 * - for inherited mountpoints, we want to take everything 2216 * after our ancestor and append it to the inherited value. 2217 * 2218 * If the pool has an alternate root, we want to prepend that 2219 * root to any values we return. 2220 */ 2221 2222 str = getprop_string(zhp, prop, &source); 2223 2224 if (str[0] == '/') { 2225 char buf[MAXPATHLEN]; 2226 char *root = buf; 2227 const char *relpath; 2228 2229 /* 2230 * If we inherit the mountpoint, even from a dataset 2231 * with a received value, the source will be the path of 2232 * the dataset we inherit from. If source is 2233 * ZPROP_SOURCE_VAL_RECVD, the received value is not 2234 * inherited. 2235 */ 2236 if (strcmp(source, ZPROP_SOURCE_VAL_RECVD) == 0) { 2237 relpath = ""; 2238 } else { 2239 relpath = zhp->zfs_name + strlen(source); 2240 if (relpath[0] == '/') 2241 relpath++; 2242 } 2243 2244 if ((zpool_get_prop(zhp->zpool_hdl, 2245 ZPOOL_PROP_ALTROOT, buf, MAXPATHLEN, NULL, 2246 B_FALSE)) || (strcmp(root, "-") == 0)) 2247 root[0] = '\0'; 2248 /* 2249 * Special case an alternate root of '/'. This will 2250 * avoid having multiple leading slashes in the 2251 * mountpoint path. 2252 */ 2253 if (strcmp(root, "/") == 0) 2254 root++; 2255 2256 /* 2257 * If the mountpoint is '/' then skip over this 2258 * if we are obtaining either an alternate root or 2259 * an inherited mountpoint. 2260 */ 2261 if (str[1] == '\0' && (root[0] != '\0' || 2262 relpath[0] != '\0')) 2263 str++; 2264 2265 if (relpath[0] == '\0') 2266 (void) snprintf(propbuf, proplen, "%s%s", 2267 root, str); 2268 else 2269 (void) snprintf(propbuf, proplen, "%s%s%s%s", 2270 root, str, relpath[0] == '@' ? "" : "/", 2271 relpath); 2272 } else { 2273 /* 'legacy' or 'none' */ 2274 (void) strlcpy(propbuf, str, proplen); 2275 } 2276 2277 break; 2278 2279 case ZFS_PROP_ORIGIN: 2280 (void) strlcpy(propbuf, getprop_string(zhp, prop, &source), 2281 proplen); 2282 /* 2283 * If there is no parent at all, return failure to indicate that 2284 * it doesn't apply to this dataset. 2285 */ 2286 if (propbuf[0] == '\0') 2287 return (-1); 2288 break; 2289 2290 case ZFS_PROP_CLONES: 2291 if (get_clones_string(zhp, propbuf, proplen) != 0) 2292 return (-1); 2293 break; 2294 2295 case ZFS_PROP_QUOTA: 2296 case ZFS_PROP_REFQUOTA: 2297 case ZFS_PROP_RESERVATION: 2298 case ZFS_PROP_REFRESERVATION: 2299 2300 if (get_numeric_property(zhp, prop, src, &source, &val) != 0) 2301 return (-1); 2302 2303 /* 2304 * If quota or reservation is 0, we translate this into 'none' 2305 * (unless literal is set), and indicate that it's the default 2306 * value. Otherwise, we print the number nicely and indicate 2307 * that its set locally. 2308 */ 2309 if (val == 0) { 2310 if (literal) 2311 (void) strlcpy(propbuf, "0", proplen); 2312 else 2313 (void) strlcpy(propbuf, "none", proplen); 2314 } else { 2315 if (literal) 2316 (void) snprintf(propbuf, proplen, "%llu", 2317 (u_longlong_t)val); 2318 else 2319 zfs_nicenum(val, propbuf, proplen); 2320 } 2321 break; 2322 2323 case ZFS_PROP_FILESYSTEM_LIMIT: 2324 case ZFS_PROP_SNAPSHOT_LIMIT: 2325 case ZFS_PROP_FILESYSTEM_COUNT: 2326 case ZFS_PROP_SNAPSHOT_COUNT: 2327 2328 if (get_numeric_property(zhp, prop, src, &source, &val) != 0) 2329 return (-1); 2330 2331 /* 2332 * If limit is UINT64_MAX, we translate this into 'none' (unless 2333 * literal is set), and indicate that it's the default value. 2334 * Otherwise, we print the number nicely and indicate that it's 2335 * set locally. 2336 */ 2337 if (literal) { 2338 (void) snprintf(propbuf, proplen, "%llu", 2339 (u_longlong_t)val); 2340 } else if (val == UINT64_MAX) { 2341 (void) strlcpy(propbuf, "none", proplen); 2342 } else { 2343 zfs_nicenum(val, propbuf, proplen); 2344 } 2345 break; 2346 2347 case ZFS_PROP_REFRATIO: 2348 case ZFS_PROP_COMPRESSRATIO: 2349 if (get_numeric_property(zhp, prop, src, &source, &val) != 0) 2350 return (-1); 2351 (void) snprintf(propbuf, proplen, "%llu.%02llux", 2352 (u_longlong_t)(val / 100), 2353 (u_longlong_t)(val % 100)); 2354 break; 2355 2356 case ZFS_PROP_TYPE: 2357 switch (zhp->zfs_type) { 2358 case ZFS_TYPE_FILESYSTEM: 2359 str = "filesystem"; 2360 break; 2361 case ZFS_TYPE_VOLUME: 2362 str = "volume"; 2363 break; 2364 case ZFS_TYPE_SNAPSHOT: 2365 str = "snapshot"; 2366 break; 2367 case ZFS_TYPE_BOOKMARK: 2368 str = "bookmark"; 2369 break; 2370 default: 2371 abort(); 2372 } 2373 (void) snprintf(propbuf, proplen, "%s", str); 2374 break; 2375 2376 case ZFS_PROP_MOUNTED: 2377 /* 2378 * The 'mounted' property is a pseudo-property that described 2379 * whether the filesystem is currently mounted. Even though 2380 * it's a boolean value, the typical values of "on" and "off" 2381 * don't make sense, so we translate to "yes" and "no". 2382 */ 2383 if (get_numeric_property(zhp, ZFS_PROP_MOUNTED, 2384 src, &source, &val) != 0) 2385 return (-1); 2386 if (val) 2387 (void) strlcpy(propbuf, "yes", proplen); 2388 else 2389 (void) strlcpy(propbuf, "no", proplen); 2390 break; 2391 2392 case ZFS_PROP_NAME: 2393 /* 2394 * The 'name' property is a pseudo-property derived from the 2395 * dataset name. It is presented as a real property to simplify 2396 * consumers. 2397 */ 2398 (void) strlcpy(propbuf, zhp->zfs_name, proplen); 2399 break; 2400 2401 case ZFS_PROP_MLSLABEL: 2402 { 2403#ifdef sun 2404 m_label_t *new_sl = NULL; 2405 char *ascii = NULL; /* human readable label */ 2406 2407 (void) strlcpy(propbuf, 2408 getprop_string(zhp, prop, &source), proplen); 2409 2410 if (literal || (strcasecmp(propbuf, 2411 ZFS_MLSLABEL_DEFAULT) == 0)) 2412 break; 2413 2414 /* 2415 * Try to translate the internal hex string to 2416 * human-readable output. If there are any 2417 * problems just use the hex string. 2418 */ 2419 2420 if (str_to_label(propbuf, &new_sl, MAC_LABEL, 2421 L_NO_CORRECTION, NULL) == -1) { 2422 m_label_free(new_sl); 2423 break; 2424 } 2425 2426 if (label_to_str(new_sl, &ascii, M_LABEL, 2427 DEF_NAMES) != 0) { 2428 if (ascii) 2429 free(ascii); 2430 m_label_free(new_sl); 2431 break; 2432 } 2433 m_label_free(new_sl); 2434 2435 (void) strlcpy(propbuf, ascii, proplen); 2436 free(ascii); 2437#else /* !sun */ 2438 propbuf[0] = '\0'; 2439#endif /* !sun */ 2440 } 2441 break; 2442 2443 case ZFS_PROP_GUID: 2444 /* 2445 * GUIDs are stored as numbers, but they are identifiers. 2446 * We don't want them to be pretty printed, because pretty 2447 * printing mangles the ID into a truncated and useless value. 2448 */ 2449 if (get_numeric_property(zhp, prop, src, &source, &val) != 0) 2450 return (-1); 2451 (void) snprintf(propbuf, proplen, "%llu", (u_longlong_t)val); 2452 break; 2453 2454 default: 2455 switch (zfs_prop_get_type(prop)) { 2456 case PROP_TYPE_NUMBER: 2457 if (get_numeric_property(zhp, prop, src, 2458 &source, &val) != 0) 2459 return (-1); 2460 if (literal) 2461 (void) snprintf(propbuf, proplen, "%llu", 2462 (u_longlong_t)val); 2463 else 2464 zfs_nicenum(val, propbuf, proplen); 2465 break; 2466 2467 case PROP_TYPE_STRING: 2468 (void) strlcpy(propbuf, 2469 getprop_string(zhp, prop, &source), proplen); 2470 break; 2471 2472 case PROP_TYPE_INDEX: 2473 if (get_numeric_property(zhp, prop, src, 2474 &source, &val) != 0) 2475 return (-1); 2476 if (zfs_prop_index_to_string(prop, val, &strval) != 0) 2477 return (-1); 2478 (void) strlcpy(propbuf, strval, proplen); 2479 break; 2480 2481 default: 2482 abort(); 2483 } 2484 } 2485 2486 get_source(zhp, src, source, statbuf, statlen); 2487 2488 return (0); 2489} 2490 2491/* 2492 * Utility function to get the given numeric property. Does no validation that 2493 * the given property is the appropriate type; should only be used with 2494 * hard-coded property types. 2495 */ 2496uint64_t 2497zfs_prop_get_int(zfs_handle_t *zhp, zfs_prop_t prop) 2498{ 2499 char *source; 2500 uint64_t val; 2501 2502 (void) get_numeric_property(zhp, prop, NULL, &source, &val); 2503 2504 return (val); 2505} 2506 2507int 2508zfs_prop_set_int(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t val) 2509{ 2510 char buf[64]; 2511 2512 (void) snprintf(buf, sizeof (buf), "%llu", (longlong_t)val); 2513 return (zfs_prop_set(zhp, zfs_prop_to_name(prop), buf)); 2514} 2515 2516/* 2517 * Similar to zfs_prop_get(), but returns the value as an integer. 2518 */ 2519int 2520zfs_prop_get_numeric(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t *value, 2521 zprop_source_t *src, char *statbuf, size_t statlen) 2522{ 2523 char *source; 2524 2525 /* 2526 * Check to see if this property applies to our object 2527 */ 2528 if (!zfs_prop_valid_for_type(prop, zhp->zfs_type)) { 2529 return (zfs_error_fmt(zhp->zfs_hdl, EZFS_PROPTYPE, 2530 dgettext(TEXT_DOMAIN, "cannot get property '%s'"), 2531 zfs_prop_to_name(prop))); 2532 } 2533 2534 if (src) 2535 *src = ZPROP_SRC_NONE; 2536 2537 if (get_numeric_property(zhp, prop, src, &source, value) != 0) 2538 return (-1); 2539 2540 get_source(zhp, src, source, statbuf, statlen); 2541 2542 return (0); 2543} 2544 2545static int 2546idmap_id_to_numeric_domain_rid(uid_t id, boolean_t isuser, 2547 char **domainp, idmap_rid_t *ridp) 2548{ 2549#ifdef sun 2550 idmap_get_handle_t *get_hdl = NULL; 2551 idmap_stat status; 2552 int err = EINVAL; 2553 2554 if (idmap_get_create(&get_hdl) != IDMAP_SUCCESS) 2555 goto out; 2556 2557 if (isuser) { 2558 err = idmap_get_sidbyuid(get_hdl, id, 2559 IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status); 2560 } else { 2561 err = idmap_get_sidbygid(get_hdl, id, 2562 IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status); 2563 } 2564 if (err == IDMAP_SUCCESS && 2565 idmap_get_mappings(get_hdl) == IDMAP_SUCCESS && 2566 status == IDMAP_SUCCESS) 2567 err = 0; 2568 else 2569 err = EINVAL; 2570out: 2571 if (get_hdl) 2572 idmap_get_destroy(get_hdl); 2573 return (err); 2574#else /* !sun */ 2575 assert(!"invalid code path"); 2576#endif /* !sun */ 2577} 2578 2579/* 2580 * convert the propname into parameters needed by kernel 2581 * Eg: userquota@ahrens -> ZFS_PROP_USERQUOTA, "", 126829 2582 * Eg: userused@matt@domain -> ZFS_PROP_USERUSED, "S-1-123-456", 789 2583 */ 2584static int 2585userquota_propname_decode(const char *propname, boolean_t zoned, 2586 zfs_userquota_prop_t *typep, char *domain, int domainlen, uint64_t *ridp) 2587{ 2588 zfs_userquota_prop_t type; 2589 char *cp, *end; 2590 char *numericsid = NULL; 2591 boolean_t isuser; 2592 2593 domain[0] = '\0'; 2594 2595 /* Figure out the property type ({user|group}{quota|space}) */ 2596 for (type = 0; type < ZFS_NUM_USERQUOTA_PROPS; type++) { 2597 if (strncmp(propname, zfs_userquota_prop_prefixes[type], 2598 strlen(zfs_userquota_prop_prefixes[type])) == 0) 2599 break; 2600 } 2601 if (type == ZFS_NUM_USERQUOTA_PROPS) 2602 return (EINVAL); 2603 *typep = type; 2604 2605 isuser = (type == ZFS_PROP_USERQUOTA || 2606 type == ZFS_PROP_USERUSED); 2607 2608 cp = strchr(propname, '@') + 1; 2609 2610 if (strchr(cp, '@')) { 2611#ifdef sun 2612 /* 2613 * It's a SID name (eg "user@domain") that needs to be 2614 * turned into S-1-domainID-RID. 2615 */ 2616 directory_error_t e; 2617 if (zoned && getzoneid() == GLOBAL_ZONEID) 2618 return (ENOENT); 2619 if (isuser) { 2620 e = directory_sid_from_user_name(NULL, 2621 cp, &numericsid); 2622 } else { 2623 e = directory_sid_from_group_name(NULL, 2624 cp, &numericsid); 2625 } 2626 if (e != NULL) { 2627 directory_error_free(e); 2628 return (ENOENT); 2629 } 2630 if (numericsid == NULL) 2631 return (ENOENT); 2632 cp = numericsid; 2633 /* will be further decoded below */ 2634#else /* !sun */ 2635 return (ENOENT); 2636#endif /* !sun */ 2637 } 2638 2639 if (strncmp(cp, "S-1-", 4) == 0) { 2640 /* It's a numeric SID (eg "S-1-234-567-89") */ 2641 (void) strlcpy(domain, cp, domainlen); 2642 cp = strrchr(domain, '-'); 2643 *cp = '\0'; 2644 cp++; 2645 2646 errno = 0; 2647 *ridp = strtoull(cp, &end, 10); 2648 if (numericsid) { 2649 free(numericsid); 2650 numericsid = NULL; 2651 } 2652 if (errno != 0 || *end != '\0') 2653 return (EINVAL); 2654 } else if (!isdigit(*cp)) { 2655 /* 2656 * It's a user/group name (eg "user") that needs to be 2657 * turned into a uid/gid 2658 */ 2659 if (zoned && getzoneid() == GLOBAL_ZONEID) 2660 return (ENOENT); 2661 if (isuser) { 2662 struct passwd *pw; 2663 pw = getpwnam(cp); 2664 if (pw == NULL) 2665 return (ENOENT); 2666 *ridp = pw->pw_uid; 2667 } else { 2668 struct group *gr; 2669 gr = getgrnam(cp); 2670 if (gr == NULL) 2671 return (ENOENT); 2672 *ridp = gr->gr_gid; 2673 } 2674 } else { 2675 /* It's a user/group ID (eg "12345"). */ 2676 uid_t id = strtoul(cp, &end, 10); 2677 idmap_rid_t rid; 2678 char *mapdomain; 2679 2680 if (*end != '\0') 2681 return (EINVAL); 2682 if (id > MAXUID) { 2683 /* It's an ephemeral ID. */ 2684 if (idmap_id_to_numeric_domain_rid(id, isuser, 2685 &mapdomain, &rid) != 0) 2686 return (ENOENT); 2687 (void) strlcpy(domain, mapdomain, domainlen); 2688 *ridp = rid; 2689 } else { 2690 *ridp = id; 2691 } 2692 } 2693 2694 ASSERT3P(numericsid, ==, NULL); 2695 return (0); 2696} 2697 2698static int 2699zfs_prop_get_userquota_common(zfs_handle_t *zhp, const char *propname, 2700 uint64_t *propvalue, zfs_userquota_prop_t *typep) 2701{ 2702 int err; 2703 zfs_cmd_t zc = { 0 }; 2704 2705 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 2706 2707 err = userquota_propname_decode(propname, 2708 zfs_prop_get_int(zhp, ZFS_PROP_ZONED), 2709 typep, zc.zc_value, sizeof (zc.zc_value), &zc.zc_guid); 2710 zc.zc_objset_type = *typep; 2711 if (err) 2712 return (err); 2713 2714 err = ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_USERSPACE_ONE, &zc); 2715 if (err) 2716 return (err); 2717 2718 *propvalue = zc.zc_cookie; 2719 return (0); 2720} 2721 2722int 2723zfs_prop_get_userquota_int(zfs_handle_t *zhp, const char *propname, 2724 uint64_t *propvalue) 2725{ 2726 zfs_userquota_prop_t type; 2727 2728 return (zfs_prop_get_userquota_common(zhp, propname, propvalue, 2729 &type)); 2730} 2731 2732int 2733zfs_prop_get_userquota(zfs_handle_t *zhp, const char *propname, 2734 char *propbuf, int proplen, boolean_t literal) 2735{ 2736 int err; 2737 uint64_t propvalue; 2738 zfs_userquota_prop_t type; 2739 2740 err = zfs_prop_get_userquota_common(zhp, propname, &propvalue, 2741 &type); 2742 2743 if (err) 2744 return (err); 2745 2746 if (literal) { 2747 (void) snprintf(propbuf, proplen, "%llu", propvalue); 2748 } else if (propvalue == 0 && 2749 (type == ZFS_PROP_USERQUOTA || type == ZFS_PROP_GROUPQUOTA)) { 2750 (void) strlcpy(propbuf, "none", proplen); 2751 } else { 2752 zfs_nicenum(propvalue, propbuf, proplen); 2753 } 2754 return (0); 2755} 2756 2757int 2758zfs_prop_get_written_int(zfs_handle_t *zhp, const char *propname, 2759 uint64_t *propvalue) 2760{ 2761 int err; 2762 zfs_cmd_t zc = { 0 }; 2763 const char *snapname; 2764 2765 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 2766 2767 snapname = strchr(propname, '@') + 1; 2768 if (strchr(snapname, '@')) { 2769 (void) strlcpy(zc.zc_value, snapname, sizeof (zc.zc_value)); 2770 } else { 2771 /* snapname is the short name, append it to zhp's fsname */ 2772 char *cp; 2773 2774 (void) strlcpy(zc.zc_value, zhp->zfs_name, 2775 sizeof (zc.zc_value)); 2776 cp = strchr(zc.zc_value, '@'); 2777 if (cp != NULL) 2778 *cp = '\0'; 2779 (void) strlcat(zc.zc_value, "@", sizeof (zc.zc_value)); 2780 (void) strlcat(zc.zc_value, snapname, sizeof (zc.zc_value)); 2781 } 2782 2783 err = ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_SPACE_WRITTEN, &zc); 2784 if (err) 2785 return (err); 2786 2787 *propvalue = zc.zc_cookie; 2788 return (0); 2789} 2790 2791int 2792zfs_prop_get_written(zfs_handle_t *zhp, const char *propname, 2793 char *propbuf, int proplen, boolean_t literal) 2794{ 2795 int err; 2796 uint64_t propvalue; 2797 2798 err = zfs_prop_get_written_int(zhp, propname, &propvalue); 2799 2800 if (err) 2801 return (err); 2802 2803 if (literal) { 2804 (void) snprintf(propbuf, proplen, "%llu", propvalue); 2805 } else { 2806 zfs_nicenum(propvalue, propbuf, proplen); 2807 } 2808 return (0); 2809} 2810 2811/* 2812 * Returns the name of the given zfs handle. 2813 */ 2814const char * 2815zfs_get_name(const zfs_handle_t *zhp) 2816{ 2817 return (zhp->zfs_name); 2818} 2819 2820/* 2821 * Returns the type of the given zfs handle. 2822 */ 2823zfs_type_t 2824zfs_get_type(const zfs_handle_t *zhp) 2825{ 2826 return (zhp->zfs_type); 2827} 2828 2829/* 2830 * Is one dataset name a child dataset of another? 2831 * 2832 * Needs to handle these cases: 2833 * Dataset 1 "a/foo" "a/foo" "a/foo" "a/foo" 2834 * Dataset 2 "a/fo" "a/foobar" "a/bar/baz" "a/foo/bar" 2835 * Descendant? No. No. No. Yes. 2836 */ 2837static boolean_t 2838is_descendant(const char *ds1, const char *ds2) 2839{ 2840 size_t d1len = strlen(ds1); 2841 2842 /* ds2 can't be a descendant if it's smaller */ 2843 if (strlen(ds2) < d1len) 2844 return (B_FALSE); 2845 2846 /* otherwise, compare strings and verify that there's a '/' char */ 2847 return (ds2[d1len] == '/' && (strncmp(ds1, ds2, d1len) == 0)); 2848} 2849 2850/* 2851 * Given a complete name, return just the portion that refers to the parent. 2852 * Will return -1 if there is no parent (path is just the name of the 2853 * pool). 2854 */ 2855static int 2856parent_name(const char *path, char *buf, size_t buflen) 2857{ 2858 char *slashp; 2859 2860 (void) strlcpy(buf, path, buflen); 2861 2862 if ((slashp = strrchr(buf, '/')) == NULL) 2863 return (-1); 2864 *slashp = '\0'; 2865 2866 return (0); 2867} 2868 2869/* 2870 * If accept_ancestor is false, then check to make sure that the given path has 2871 * a parent, and that it exists. If accept_ancestor is true, then find the 2872 * closest existing ancestor for the given path. In prefixlen return the 2873 * length of already existing prefix of the given path. We also fetch the 2874 * 'zoned' property, which is used to validate property settings when creating 2875 * new datasets. 2876 */ 2877static int 2878check_parents(libzfs_handle_t *hdl, const char *path, uint64_t *zoned, 2879 boolean_t accept_ancestor, int *prefixlen) 2880{ 2881 zfs_cmd_t zc = { 0 }; 2882 char parent[ZFS_MAXNAMELEN]; 2883 char *slash; 2884 zfs_handle_t *zhp; 2885 char errbuf[1024]; 2886 uint64_t is_zoned; 2887 2888 (void) snprintf(errbuf, sizeof (errbuf), 2889 dgettext(TEXT_DOMAIN, "cannot create '%s'"), path); 2890 2891 /* get parent, and check to see if this is just a pool */ 2892 if (parent_name(path, parent, sizeof (parent)) != 0) { 2893 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 2894 "missing dataset name")); 2895 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 2896 } 2897 2898 /* check to see if the pool exists */ 2899 if ((slash = strchr(parent, '/')) == NULL) 2900 slash = parent + strlen(parent); 2901 (void) strncpy(zc.zc_name, parent, slash - parent); 2902 zc.zc_name[slash - parent] = '\0'; 2903 if (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_STATS, &zc) != 0 && 2904 errno == ENOENT) { 2905 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 2906 "no such pool '%s'"), zc.zc_name); 2907 return (zfs_error(hdl, EZFS_NOENT, errbuf)); 2908 } 2909 2910 /* check to see if the parent dataset exists */ 2911 while ((zhp = make_dataset_handle(hdl, parent)) == NULL) { 2912 if (errno == ENOENT && accept_ancestor) { 2913 /* 2914 * Go deeper to find an ancestor, give up on top level. 2915 */ 2916 if (parent_name(parent, parent, sizeof (parent)) != 0) { 2917 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 2918 "no such pool '%s'"), zc.zc_name); 2919 return (zfs_error(hdl, EZFS_NOENT, errbuf)); 2920 } 2921 } else if (errno == ENOENT) { 2922 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 2923 "parent does not exist")); 2924 return (zfs_error(hdl, EZFS_NOENT, errbuf)); 2925 } else 2926 return (zfs_standard_error(hdl, errno, errbuf)); 2927 } 2928 2929 is_zoned = zfs_prop_get_int(zhp, ZFS_PROP_ZONED); 2930 if (zoned != NULL) 2931 *zoned = is_zoned; 2932 2933 /* we are in a non-global zone, but parent is in the global zone */ 2934 if (getzoneid() != GLOBAL_ZONEID && !is_zoned) { 2935 (void) zfs_standard_error(hdl, EPERM, errbuf); 2936 zfs_close(zhp); 2937 return (-1); 2938 } 2939 2940 /* make sure parent is a filesystem */ 2941 if (zfs_get_type(zhp) != ZFS_TYPE_FILESYSTEM) { 2942 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 2943 "parent is not a filesystem")); 2944 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf); 2945 zfs_close(zhp); 2946 return (-1); 2947 } 2948 2949 zfs_close(zhp); 2950 if (prefixlen != NULL) 2951 *prefixlen = strlen(parent); 2952 return (0); 2953} 2954 2955/* 2956 * Finds whether the dataset of the given type(s) exists. 2957 */ 2958boolean_t 2959zfs_dataset_exists(libzfs_handle_t *hdl, const char *path, zfs_type_t types) 2960{ 2961 zfs_handle_t *zhp; 2962 2963 if (!zfs_validate_name(hdl, path, types, B_FALSE)) 2964 return (B_FALSE); 2965 2966 /* 2967 * Try to get stats for the dataset, which will tell us if it exists. 2968 */ 2969 if ((zhp = make_dataset_handle(hdl, path)) != NULL) { 2970 int ds_type = zhp->zfs_type; 2971 2972 zfs_close(zhp); 2973 if (types & ds_type) 2974 return (B_TRUE); 2975 } 2976 return (B_FALSE); 2977} 2978 2979/* 2980 * Given a path to 'target', create all the ancestors between 2981 * the prefixlen portion of the path, and the target itself. 2982 * Fail if the initial prefixlen-ancestor does not already exist. 2983 */ 2984int 2985create_parents(libzfs_handle_t *hdl, char *target, int prefixlen) 2986{ 2987 zfs_handle_t *h; 2988 char *cp; 2989 const char *opname; 2990 2991 /* make sure prefix exists */ 2992 cp = target + prefixlen; 2993 if (*cp != '/') { 2994 assert(strchr(cp, '/') == NULL); 2995 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM); 2996 } else { 2997 *cp = '\0'; 2998 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM); 2999 *cp = '/'; 3000 } 3001 if (h == NULL) 3002 return (-1); 3003 zfs_close(h); 3004 3005 /* 3006 * Attempt to create, mount, and share any ancestor filesystems, 3007 * up to the prefixlen-long one. 3008 */ 3009 for (cp = target + prefixlen + 1; 3010 cp = strchr(cp, '/'); *cp = '/', cp++) { 3011 3012 *cp = '\0'; 3013 3014 h = make_dataset_handle(hdl, target); 3015 if (h) { 3016 /* it already exists, nothing to do here */ 3017 zfs_close(h); 3018 continue; 3019 } 3020 3021 if (zfs_create(hdl, target, ZFS_TYPE_FILESYSTEM, 3022 NULL) != 0) { 3023 opname = dgettext(TEXT_DOMAIN, "create"); 3024 goto ancestorerr; 3025 } 3026 3027 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM); 3028 if (h == NULL) { 3029 opname = dgettext(TEXT_DOMAIN, "open"); 3030 goto ancestorerr; 3031 } 3032 3033 if (zfs_mount(h, NULL, 0) != 0) { 3034 opname = dgettext(TEXT_DOMAIN, "mount"); 3035 goto ancestorerr; 3036 } 3037 3038 if (zfs_share(h) != 0) { 3039 opname = dgettext(TEXT_DOMAIN, "share"); 3040 goto ancestorerr; 3041 } 3042 3043 zfs_close(h); 3044 } 3045 3046 return (0); 3047 3048ancestorerr: 3049 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3050 "failed to %s ancestor '%s'"), opname, target); 3051 return (-1); 3052} 3053 3054/* 3055 * Creates non-existing ancestors of the given path. 3056 */ 3057int 3058zfs_create_ancestors(libzfs_handle_t *hdl, const char *path) 3059{ 3060 int prefix; 3061 char *path_copy; 3062 int rc; 3063 3064 if (check_parents(hdl, path, NULL, B_TRUE, &prefix) != 0) 3065 return (-1); 3066 3067 if ((path_copy = strdup(path)) != NULL) { 3068 rc = create_parents(hdl, path_copy, prefix); 3069 free(path_copy); 3070 } 3071 if (path_copy == NULL || rc != 0) 3072 return (-1); 3073 3074 return (0); 3075} 3076 3077/* 3078 * Create a new filesystem or volume. 3079 */ 3080int 3081zfs_create(libzfs_handle_t *hdl, const char *path, zfs_type_t type, 3082 nvlist_t *props) 3083{ 3084 int ret; 3085 uint64_t size = 0; 3086 uint64_t blocksize = zfs_prop_default_numeric(ZFS_PROP_VOLBLOCKSIZE); 3087 char errbuf[1024]; 3088 uint64_t zoned; 3089 dmu_objset_type_t ost; 3090 3091 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3092 "cannot create '%s'"), path); 3093 3094 /* validate the path, taking care to note the extended error message */ 3095 if (!zfs_validate_name(hdl, path, type, B_TRUE)) 3096 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3097 3098 /* validate parents exist */ 3099 if (check_parents(hdl, path, &zoned, B_FALSE, NULL) != 0) 3100 return (-1); 3101 3102 /* 3103 * The failure modes when creating a dataset of a different type over 3104 * one that already exists is a little strange. In particular, if you 3105 * try to create a dataset on top of an existing dataset, the ioctl() 3106 * will return ENOENT, not EEXIST. To prevent this from happening, we 3107 * first try to see if the dataset exists. 3108 */ 3109 if (zfs_dataset_exists(hdl, path, ZFS_TYPE_DATASET)) { 3110 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3111 "dataset already exists")); 3112 return (zfs_error(hdl, EZFS_EXISTS, errbuf)); 3113 } 3114 3115 if (type == ZFS_TYPE_VOLUME) 3116 ost = DMU_OST_ZVOL; 3117 else 3118 ost = DMU_OST_ZFS; 3119 3120 if (props && (props = zfs_valid_proplist(hdl, type, props, 3121 zoned, NULL, errbuf)) == 0) 3122 return (-1); 3123 3124 if (type == ZFS_TYPE_VOLUME) { 3125 /* 3126 * If we are creating a volume, the size and block size must 3127 * satisfy a few restraints. First, the blocksize must be a 3128 * valid block size between SPA_{MIN,MAX}BLOCKSIZE. Second, the 3129 * volsize must be a multiple of the block size, and cannot be 3130 * zero. 3131 */ 3132 if (props == NULL || nvlist_lookup_uint64(props, 3133 zfs_prop_to_name(ZFS_PROP_VOLSIZE), &size) != 0) { 3134 nvlist_free(props); 3135 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3136 "missing volume size")); 3137 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 3138 } 3139 3140 if ((ret = nvlist_lookup_uint64(props, 3141 zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE), 3142 &blocksize)) != 0) { 3143 if (ret == ENOENT) { 3144 blocksize = zfs_prop_default_numeric( 3145 ZFS_PROP_VOLBLOCKSIZE); 3146 } else { 3147 nvlist_free(props); 3148 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3149 "missing volume block size")); 3150 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 3151 } 3152 } 3153 3154 if (size == 0) { 3155 nvlist_free(props); 3156 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3157 "volume size cannot be zero")); 3158 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 3159 } 3160 3161 if (size % blocksize != 0) { 3162 nvlist_free(props); 3163 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3164 "volume size must be a multiple of volume block " 3165 "size")); 3166 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 3167 } 3168 } 3169 3170 /* create the dataset */ 3171 ret = lzc_create(path, ost, props); 3172 nvlist_free(props); 3173 3174 /* check for failure */ 3175 if (ret != 0) { 3176 char parent[ZFS_MAXNAMELEN]; 3177 (void) parent_name(path, parent, sizeof (parent)); 3178 3179 switch (errno) { 3180 case ENOENT: 3181 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3182 "no such parent '%s'"), parent); 3183 return (zfs_error(hdl, EZFS_NOENT, errbuf)); 3184 3185 case EINVAL: 3186 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3187 "parent '%s' is not a filesystem"), parent); 3188 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 3189 3190 case EDOM: 3191 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3192 "volume block size must be power of 2 from " 3193 "%u to %uk"), 3194 (uint_t)SPA_MINBLOCKSIZE, 3195 (uint_t)SPA_MAXBLOCKSIZE >> 10); 3196 3197 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 3198 3199 case ENOTSUP: 3200 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3201 "pool must be upgraded to set this " 3202 "property or value")); 3203 return (zfs_error(hdl, EZFS_BADVERSION, errbuf)); 3204#ifdef _ILP32 3205 case EOVERFLOW: 3206 /* 3207 * This platform can't address a volume this big. 3208 */ 3209 if (type == ZFS_TYPE_VOLUME) 3210 return (zfs_error(hdl, EZFS_VOLTOOBIG, 3211 errbuf)); 3212#endif 3213 /* FALLTHROUGH */ 3214 default: 3215 return (zfs_standard_error(hdl, errno, errbuf)); 3216 } 3217 } 3218 3219 return (0); 3220} 3221 3222/* 3223 * Destroys the given dataset. The caller must make sure that the filesystem 3224 * isn't mounted, and that there are no active dependents. If the file system 3225 * does not exist this function does nothing. 3226 */ 3227int 3228zfs_destroy(zfs_handle_t *zhp, boolean_t defer) 3229{ 3230 zfs_cmd_t zc = { 0 }; 3231 3232 if (zhp->zfs_type == ZFS_TYPE_BOOKMARK) { 3233 nvlist_t *nv = fnvlist_alloc(); 3234 fnvlist_add_boolean(nv, zhp->zfs_name); 3235 int error = lzc_destroy_bookmarks(nv, NULL); 3236 fnvlist_free(nv); 3237 if (error != 0) { 3238 return (zfs_standard_error_fmt(zhp->zfs_hdl, errno, 3239 dgettext(TEXT_DOMAIN, "cannot destroy '%s'"), 3240 zhp->zfs_name)); 3241 } 3242 return (0); 3243 } 3244 3245 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 3246 3247 if (ZFS_IS_VOLUME(zhp)) { 3248 zc.zc_objset_type = DMU_OST_ZVOL; 3249 } else { 3250 zc.zc_objset_type = DMU_OST_ZFS; 3251 } 3252 3253 zc.zc_defer_destroy = defer; 3254 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_DESTROY, &zc) != 0 && 3255 errno != ENOENT) { 3256 return (zfs_standard_error_fmt(zhp->zfs_hdl, errno, 3257 dgettext(TEXT_DOMAIN, "cannot destroy '%s'"), 3258 zhp->zfs_name)); 3259 } 3260 3261 remove_mountpoint(zhp); 3262 3263 return (0); 3264} 3265 3266struct destroydata { 3267 nvlist_t *nvl; 3268 const char *snapname; 3269}; 3270 3271static int 3272zfs_check_snap_cb(zfs_handle_t *zhp, void *arg) 3273{ 3274 struct destroydata *dd = arg; 3275 char name[ZFS_MAXNAMELEN]; 3276 int rv = 0; 3277 3278 (void) snprintf(name, sizeof (name), 3279 "%s@%s", zhp->zfs_name, dd->snapname); 3280 3281 if (lzc_exists(name)) 3282 verify(nvlist_add_boolean(dd->nvl, name) == 0); 3283 3284 rv = zfs_iter_filesystems(zhp, zfs_check_snap_cb, dd); 3285 zfs_close(zhp); 3286 return (rv); 3287} 3288 3289/* 3290 * Destroys all snapshots with the given name in zhp & descendants. 3291 */ 3292int 3293zfs_destroy_snaps(zfs_handle_t *zhp, char *snapname, boolean_t defer) 3294{ 3295 int ret; 3296 struct destroydata dd = { 0 }; 3297 3298 dd.snapname = snapname; 3299 verify(nvlist_alloc(&dd.nvl, NV_UNIQUE_NAME, 0) == 0); 3300 (void) zfs_check_snap_cb(zfs_handle_dup(zhp), &dd); 3301 3302 if (nvlist_empty(dd.nvl)) { 3303 ret = zfs_standard_error_fmt(zhp->zfs_hdl, ENOENT, 3304 dgettext(TEXT_DOMAIN, "cannot destroy '%s@%s'"), 3305 zhp->zfs_name, snapname); 3306 } else { 3307 ret = zfs_destroy_snaps_nvl(zhp->zfs_hdl, dd.nvl, defer); 3308 } 3309 nvlist_free(dd.nvl); 3310 return (ret); 3311} 3312 3313/* 3314 * Destroys all the snapshots named in the nvlist. 3315 */ 3316int 3317zfs_destroy_snaps_nvl(libzfs_handle_t *hdl, nvlist_t *snaps, boolean_t defer) 3318{ 3319 int ret; 3320 nvlist_t *errlist; 3321 3322 ret = lzc_destroy_snaps(snaps, defer, &errlist); 3323 3324 if (ret == 0) 3325 return (0); 3326 3327 if (nvlist_empty(errlist)) { 3328 char errbuf[1024]; 3329 (void) snprintf(errbuf, sizeof (errbuf), 3330 dgettext(TEXT_DOMAIN, "cannot destroy snapshots")); 3331 3332 ret = zfs_standard_error(hdl, ret, errbuf); 3333 } 3334 for (nvpair_t *pair = nvlist_next_nvpair(errlist, NULL); 3335 pair != NULL; pair = nvlist_next_nvpair(errlist, pair)) { 3336 char errbuf[1024]; 3337 (void) snprintf(errbuf, sizeof (errbuf), 3338 dgettext(TEXT_DOMAIN, "cannot destroy snapshot %s"), 3339 nvpair_name(pair)); 3340 3341 switch (fnvpair_value_int32(pair)) { 3342 case EEXIST: 3343 zfs_error_aux(hdl, 3344 dgettext(TEXT_DOMAIN, "snapshot is cloned")); 3345 ret = zfs_error(hdl, EZFS_EXISTS, errbuf); 3346 break; 3347 default: 3348 ret = zfs_standard_error(hdl, errno, errbuf); 3349 break; 3350 } 3351 } 3352 3353 return (ret); 3354} 3355 3356/* 3357 * Clones the given dataset. The target must be of the same type as the source. 3358 */ 3359int 3360zfs_clone(zfs_handle_t *zhp, const char *target, nvlist_t *props) 3361{ 3362 char parent[ZFS_MAXNAMELEN]; 3363 int ret; 3364 char errbuf[1024]; 3365 libzfs_handle_t *hdl = zhp->zfs_hdl; 3366 uint64_t zoned; 3367 3368 assert(zhp->zfs_type == ZFS_TYPE_SNAPSHOT); 3369 3370 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3371 "cannot create '%s'"), target); 3372 3373 /* validate the target/clone name */ 3374 if (!zfs_validate_name(hdl, target, ZFS_TYPE_FILESYSTEM, B_TRUE)) 3375 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3376 3377 /* validate parents exist */ 3378 if (check_parents(hdl, target, &zoned, B_FALSE, NULL) != 0) 3379 return (-1); 3380 3381 (void) parent_name(target, parent, sizeof (parent)); 3382 3383 /* do the clone */ 3384 3385 if (props) { 3386 zfs_type_t type; 3387 if (ZFS_IS_VOLUME(zhp)) { 3388 type = ZFS_TYPE_VOLUME; 3389 } else { 3390 type = ZFS_TYPE_FILESYSTEM; 3391 } 3392 if ((props = zfs_valid_proplist(hdl, type, props, zoned, 3393 zhp, errbuf)) == NULL) 3394 return (-1); 3395 } 3396 3397 ret = lzc_clone(target, zhp->zfs_name, props); 3398 nvlist_free(props); 3399 3400 if (ret != 0) { 3401 switch (errno) { 3402 3403 case ENOENT: 3404 /* 3405 * The parent doesn't exist. We should have caught this 3406 * above, but there may a race condition that has since 3407 * destroyed the parent. 3408 * 3409 * At this point, we don't know whether it's the source 3410 * that doesn't exist anymore, or whether the target 3411 * dataset doesn't exist. 3412 */ 3413 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN, 3414 "no such parent '%s'"), parent); 3415 return (zfs_error(zhp->zfs_hdl, EZFS_NOENT, errbuf)); 3416 3417 case EXDEV: 3418 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN, 3419 "source and target pools differ")); 3420 return (zfs_error(zhp->zfs_hdl, EZFS_CROSSTARGET, 3421 errbuf)); 3422 3423 default: 3424 return (zfs_standard_error(zhp->zfs_hdl, errno, 3425 errbuf)); 3426 } 3427 } 3428 3429 return (ret); 3430} 3431 3432/* 3433 * Promotes the given clone fs to be the clone parent. 3434 */ 3435int 3436zfs_promote(zfs_handle_t *zhp) 3437{ 3438 libzfs_handle_t *hdl = zhp->zfs_hdl; 3439 zfs_cmd_t zc = { 0 }; 3440 char parent[MAXPATHLEN]; 3441 int ret; 3442 char errbuf[1024]; 3443 3444 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3445 "cannot promote '%s'"), zhp->zfs_name); 3446 3447 if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) { 3448 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3449 "snapshots can not be promoted")); 3450 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 3451 } 3452 3453 (void) strlcpy(parent, zhp->zfs_dmustats.dds_origin, sizeof (parent)); 3454 if (parent[0] == '\0') { 3455 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3456 "not a cloned filesystem")); 3457 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 3458 } 3459 3460 (void) strlcpy(zc.zc_value, zhp->zfs_dmustats.dds_origin, 3461 sizeof (zc.zc_value)); 3462 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 3463 ret = zfs_ioctl(hdl, ZFS_IOC_PROMOTE, &zc); 3464 3465 if (ret != 0) { 3466 int save_errno = errno; 3467 3468 switch (save_errno) { 3469 case EEXIST: 3470 /* There is a conflicting snapshot name. */ 3471 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3472 "conflicting snapshot '%s' from parent '%s'"), 3473 zc.zc_string, parent); 3474 return (zfs_error(hdl, EZFS_EXISTS, errbuf)); 3475 3476 default: 3477 return (zfs_standard_error(hdl, save_errno, errbuf)); 3478 } 3479 } 3480 return (ret); 3481} 3482 3483typedef struct snapdata { 3484 nvlist_t *sd_nvl; 3485 const char *sd_snapname; 3486} snapdata_t; 3487 3488static int 3489zfs_snapshot_cb(zfs_handle_t *zhp, void *arg) 3490{ 3491 snapdata_t *sd = arg; 3492 char name[ZFS_MAXNAMELEN]; 3493 int rv = 0; 3494 3495 if (zfs_prop_get_int(zhp, ZFS_PROP_INCONSISTENT) == 0) { 3496 (void) snprintf(name, sizeof (name), 3497 "%s@%s", zfs_get_name(zhp), sd->sd_snapname); 3498 3499 fnvlist_add_boolean(sd->sd_nvl, name); 3500 3501 rv = zfs_iter_filesystems(zhp, zfs_snapshot_cb, sd); 3502 } 3503 zfs_close(zhp); 3504 3505 return (rv); 3506} 3507 3508/* 3509 * Creates snapshots. The keys in the snaps nvlist are the snapshots to be 3510 * created. 3511 */ 3512int 3513zfs_snapshot_nvl(libzfs_handle_t *hdl, nvlist_t *snaps, nvlist_t *props) 3514{ 3515 int ret; 3516 char errbuf[1024]; 3517 nvpair_t *elem; 3518 nvlist_t *errors; 3519 3520 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3521 "cannot create snapshots ")); 3522 3523 elem = NULL; 3524 while ((elem = nvlist_next_nvpair(snaps, elem)) != NULL) { 3525 const char *snapname = nvpair_name(elem); 3526 3527 /* validate the target name */ 3528 if (!zfs_validate_name(hdl, snapname, ZFS_TYPE_SNAPSHOT, 3529 B_TRUE)) { 3530 (void) snprintf(errbuf, sizeof (errbuf), 3531 dgettext(TEXT_DOMAIN, 3532 "cannot create snapshot '%s'"), snapname); 3533 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3534 } 3535 } 3536 3537 if (props != NULL && 3538 (props = zfs_valid_proplist(hdl, ZFS_TYPE_SNAPSHOT, 3539 props, B_FALSE, NULL, errbuf)) == NULL) { 3540 return (-1); 3541 } 3542 3543 ret = lzc_snapshot(snaps, props, &errors); 3544 3545 if (ret != 0) { 3546 boolean_t printed = B_FALSE; 3547 for (elem = nvlist_next_nvpair(errors, NULL); 3548 elem != NULL; 3549 elem = nvlist_next_nvpair(errors, elem)) { 3550 (void) snprintf(errbuf, sizeof (errbuf), 3551 dgettext(TEXT_DOMAIN, 3552 "cannot create snapshot '%s'"), nvpair_name(elem)); 3553 (void) zfs_standard_error(hdl, 3554 fnvpair_value_int32(elem), errbuf); 3555 printed = B_TRUE; 3556 } 3557 if (!printed) { 3558 switch (ret) { 3559 case EXDEV: 3560 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3561 "multiple snapshots of same " 3562 "fs not allowed")); 3563 (void) zfs_error(hdl, EZFS_EXISTS, errbuf); 3564 3565 break; 3566 default: 3567 (void) zfs_standard_error(hdl, ret, errbuf); 3568 } 3569 } 3570 } 3571 3572 nvlist_free(props); 3573 nvlist_free(errors); 3574 return (ret); 3575} 3576 3577int 3578zfs_snapshot(libzfs_handle_t *hdl, const char *path, boolean_t recursive, 3579 nvlist_t *props) 3580{ 3581 int ret; 3582 snapdata_t sd = { 0 }; 3583 char fsname[ZFS_MAXNAMELEN]; 3584 char *cp; 3585 zfs_handle_t *zhp; 3586 char errbuf[1024]; 3587 3588 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3589 "cannot snapshot %s"), path); 3590 3591 if (!zfs_validate_name(hdl, path, ZFS_TYPE_SNAPSHOT, B_TRUE)) 3592 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3593 3594 (void) strlcpy(fsname, path, sizeof (fsname)); 3595 cp = strchr(fsname, '@'); 3596 *cp = '\0'; 3597 sd.sd_snapname = cp + 1; 3598 3599 if ((zhp = zfs_open(hdl, fsname, ZFS_TYPE_FILESYSTEM | 3600 ZFS_TYPE_VOLUME)) == NULL) { 3601 return (-1); 3602 } 3603 3604 verify(nvlist_alloc(&sd.sd_nvl, NV_UNIQUE_NAME, 0) == 0); 3605 if (recursive) { 3606 (void) zfs_snapshot_cb(zfs_handle_dup(zhp), &sd); 3607 } else { 3608 fnvlist_add_boolean(sd.sd_nvl, path); 3609 } 3610 3611 ret = zfs_snapshot_nvl(hdl, sd.sd_nvl, props); 3612 nvlist_free(sd.sd_nvl); 3613 zfs_close(zhp); 3614 return (ret); 3615} 3616 3617/* 3618 * Destroy any more recent snapshots. We invoke this callback on any dependents 3619 * of the snapshot first. If the 'cb_dependent' member is non-zero, then this 3620 * is a dependent and we should just destroy it without checking the transaction 3621 * group. 3622 */ 3623typedef struct rollback_data { 3624 const char *cb_target; /* the snapshot */ 3625 uint64_t cb_create; /* creation time reference */ 3626 boolean_t cb_error; 3627 boolean_t cb_force; 3628} rollback_data_t; 3629 3630static int 3631rollback_destroy_dependent(zfs_handle_t *zhp, void *data) 3632{ 3633 rollback_data_t *cbp = data; 3634 prop_changelist_t *clp; 3635 3636 /* We must destroy this clone; first unmount it */ 3637 clp = changelist_gather(zhp, ZFS_PROP_NAME, 0, 3638 cbp->cb_force ? MS_FORCE: 0); 3639 if (clp == NULL || changelist_prefix(clp) != 0) { 3640 cbp->cb_error = B_TRUE; 3641 zfs_close(zhp); 3642 return (0); 3643 } 3644 if (zfs_destroy(zhp, B_FALSE) != 0) 3645 cbp->cb_error = B_TRUE; 3646 else 3647 changelist_remove(clp, zhp->zfs_name); 3648 (void) changelist_postfix(clp); 3649 changelist_free(clp); 3650 3651 zfs_close(zhp); 3652 return (0); 3653} 3654 3655static int 3656rollback_destroy(zfs_handle_t *zhp, void *data) 3657{ 3658 rollback_data_t *cbp = data; 3659 3660 if (zfs_prop_get_int(zhp, ZFS_PROP_CREATETXG) > cbp->cb_create) { 3661 cbp->cb_error |= zfs_iter_dependents(zhp, B_FALSE, 3662 rollback_destroy_dependent, cbp); 3663 3664 cbp->cb_error |= zfs_destroy(zhp, B_FALSE); 3665 } 3666 3667 zfs_close(zhp); 3668 return (0); 3669} 3670 3671/* 3672 * Given a dataset, rollback to a specific snapshot, discarding any 3673 * data changes since then and making it the active dataset. 3674 * 3675 * Any snapshots and bookmarks more recent than the target are 3676 * destroyed, along with their dependents (i.e. clones). 3677 */ 3678int 3679zfs_rollback(zfs_handle_t *zhp, zfs_handle_t *snap, boolean_t force) 3680{ 3681 rollback_data_t cb = { 0 }; 3682 int err; 3683 boolean_t restore_resv = 0; 3684 uint64_t old_volsize, new_volsize; 3685 zfs_prop_t resv_prop; 3686 3687 assert(zhp->zfs_type == ZFS_TYPE_FILESYSTEM || 3688 zhp->zfs_type == ZFS_TYPE_VOLUME); 3689 3690 /* 3691 * Destroy all recent snapshots and their dependents. 3692 */ 3693 cb.cb_force = force; 3694 cb.cb_target = snap->zfs_name; 3695 cb.cb_create = zfs_prop_get_int(snap, ZFS_PROP_CREATETXG); 3696 (void) zfs_iter_snapshots(zhp, B_FALSE, rollback_destroy, &cb); 3697 (void) zfs_iter_bookmarks(zhp, rollback_destroy, &cb); 3698 3699 if (cb.cb_error) 3700 return (-1); 3701 3702 /* 3703 * Now that we have verified that the snapshot is the latest, 3704 * rollback to the given snapshot. 3705 */ 3706 3707 if (zhp->zfs_type == ZFS_TYPE_VOLUME) { 3708 if (zfs_which_resv_prop(zhp, &resv_prop) < 0) 3709 return (-1); 3710 old_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE); 3711 restore_resv = 3712 (old_volsize == zfs_prop_get_int(zhp, resv_prop)); 3713 } 3714 3715 /* 3716 * We rely on zfs_iter_children() to verify that there are no 3717 * newer snapshots for the given dataset. Therefore, we can 3718 * simply pass the name on to the ioctl() call. There is still 3719 * an unlikely race condition where the user has taken a 3720 * snapshot since we verified that this was the most recent. 3721 */ 3722 err = lzc_rollback(zhp->zfs_name, NULL, 0); 3723 if (err != 0) { 3724 (void) zfs_standard_error_fmt(zhp->zfs_hdl, errno, 3725 dgettext(TEXT_DOMAIN, "cannot rollback '%s'"), 3726 zhp->zfs_name); 3727 return (err); 3728 } 3729 3730 /* 3731 * For volumes, if the pre-rollback volsize matched the pre- 3732 * rollback reservation and the volsize has changed then set 3733 * the reservation property to the post-rollback volsize. 3734 * Make a new handle since the rollback closed the dataset. 3735 */ 3736 if ((zhp->zfs_type == ZFS_TYPE_VOLUME) && 3737 (zhp = make_dataset_handle(zhp->zfs_hdl, zhp->zfs_name))) { 3738 if (restore_resv) { 3739 new_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE); 3740 if (old_volsize != new_volsize) 3741 err = zfs_prop_set_int(zhp, resv_prop, 3742 new_volsize); 3743 } 3744 zfs_close(zhp); 3745 } 3746 return (err); 3747} 3748 3749/* 3750 * Renames the given dataset. 3751 */ 3752int 3753zfs_rename(zfs_handle_t *zhp, const char *source, const char *target, 3754 renameflags_t flags) 3755{ 3756 int ret; 3757 zfs_cmd_t zc = { 0 }; 3758 char *delim; 3759 prop_changelist_t *cl = NULL; 3760 zfs_handle_t *zhrp = NULL; 3761 char *parentname = NULL; 3762 char parent[ZFS_MAXNAMELEN]; 3763 char property[ZFS_MAXPROPLEN]; 3764 libzfs_handle_t *hdl = zhp->zfs_hdl; 3765 char errbuf[1024]; 3766 3767 /* if we have the same exact name, just return success */ 3768 if (strcmp(zhp->zfs_name, target) == 0) 3769 return (0); 3770 3771 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3772 "cannot rename to '%s'"), target); 3773 3774 if (source != NULL) { 3775 /* 3776 * This is recursive snapshots rename, put snapshot name 3777 * (that might not exist) into zfs_name. 3778 */ 3779 assert(flags.recurse); 3780 3781 (void) strlcat(zhp->zfs_name, "@", sizeof(zhp->zfs_name)); 3782 (void) strlcat(zhp->zfs_name, source, sizeof(zhp->zfs_name)); 3783 zhp->zfs_type = ZFS_TYPE_SNAPSHOT; 3784 } 3785 3786 /* 3787 * Make sure the target name is valid 3788 */ 3789 if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) { 3790 if ((strchr(target, '@') == NULL) || 3791 *target == '@') { 3792 /* 3793 * Snapshot target name is abbreviated, 3794 * reconstruct full dataset name 3795 */ 3796 (void) strlcpy(parent, zhp->zfs_name, 3797 sizeof (parent)); 3798 delim = strchr(parent, '@'); 3799 if (strchr(target, '@') == NULL) 3800 *(++delim) = '\0'; 3801 else 3802 *delim = '\0'; 3803 (void) strlcat(parent, target, sizeof (parent)); 3804 target = parent; 3805 } else { 3806 /* 3807 * Make sure we're renaming within the same dataset. 3808 */ 3809 delim = strchr(target, '@'); 3810 if (strncmp(zhp->zfs_name, target, delim - target) 3811 != 0 || zhp->zfs_name[delim - target] != '@') { 3812 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3813 "snapshots must be part of same " 3814 "dataset")); 3815 return (zfs_error(hdl, EZFS_CROSSTARGET, 3816 errbuf)); 3817 } 3818 } 3819 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE)) 3820 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3821 } else { 3822 if (flags.recurse) { 3823 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3824 "recursive rename must be a snapshot")); 3825 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 3826 } 3827 3828 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE)) 3829 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3830 3831 /* validate parents */ 3832 if (check_parents(hdl, target, NULL, B_FALSE, NULL) != 0) 3833 return (-1); 3834 3835 /* make sure we're in the same pool */ 3836 verify((delim = strchr(target, '/')) != NULL); 3837 if (strncmp(zhp->zfs_name, target, delim - target) != 0 || 3838 zhp->zfs_name[delim - target] != '/') { 3839 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3840 "datasets must be within same pool")); 3841 return (zfs_error(hdl, EZFS_CROSSTARGET, errbuf)); 3842 } 3843 3844 /* new name cannot be a child of the current dataset name */ 3845 if (is_descendant(zhp->zfs_name, target)) { 3846 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3847 "New dataset name cannot be a descendant of " 3848 "current dataset name")); 3849 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3850 } 3851 } 3852 3853 (void) snprintf(errbuf, sizeof (errbuf), 3854 dgettext(TEXT_DOMAIN, "cannot rename '%s'"), zhp->zfs_name); 3855 3856 if (getzoneid() == GLOBAL_ZONEID && 3857 zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) { 3858 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3859 "dataset is used in a non-global zone")); 3860 return (zfs_error(hdl, EZFS_ZONED, errbuf)); 3861 } 3862 3863 /* 3864 * Avoid unmounting file systems with mountpoint property set to 3865 * 'legacy' or 'none' even if -u option is not given. 3866 */ 3867 if (zhp->zfs_type == ZFS_TYPE_FILESYSTEM && 3868 !flags.recurse && !flags.nounmount && 3869 zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, property, 3870 sizeof (property), NULL, NULL, 0, B_FALSE) == 0 && 3871 (strcmp(property, "legacy") == 0 || 3872 strcmp(property, "none") == 0)) { 3873 flags.nounmount = B_TRUE; 3874 } 3875 3876 if (flags.recurse) { 3877 3878 parentname = zfs_strdup(zhp->zfs_hdl, zhp->zfs_name); 3879 if (parentname == NULL) { 3880 ret = -1; 3881 goto error; 3882 } 3883 delim = strchr(parentname, '@'); 3884 *delim = '\0'; 3885 zhrp = zfs_open(zhp->zfs_hdl, parentname, ZFS_TYPE_DATASET); 3886 if (zhrp == NULL) { 3887 ret = -1; 3888 goto error; 3889 } 3890 3891 } else { 3892 if ((cl = changelist_gather(zhp, ZFS_PROP_NAME, 3893 flags.nounmount ? CL_GATHER_DONT_UNMOUNT : 0, 3894 flags.forceunmount ? MS_FORCE : 0)) == NULL) { 3895 return (-1); 3896 } 3897 3898 if (changelist_haszonedchild(cl)) { 3899 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3900 "child dataset with inherited mountpoint is used " 3901 "in a non-global zone")); 3902 (void) zfs_error(hdl, EZFS_ZONED, errbuf); 3903 goto error; 3904 } 3905 3906 if ((ret = changelist_prefix(cl)) != 0) 3907 goto error; 3908 } 3909 3910 if (ZFS_IS_VOLUME(zhp)) 3911 zc.zc_objset_type = DMU_OST_ZVOL; 3912 else 3913 zc.zc_objset_type = DMU_OST_ZFS; 3914 3915 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 3916 (void) strlcpy(zc.zc_value, target, sizeof (zc.zc_value)); 3917 3918 zc.zc_cookie = flags.recurse ? 1 : 0; 3919 if (flags.nounmount) 3920 zc.zc_cookie |= 2; 3921 3922 if ((ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_RENAME, &zc)) != 0) { 3923 /* 3924 * if it was recursive, the one that actually failed will 3925 * be in zc.zc_name 3926 */ 3927 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3928 "cannot rename '%s'"), zc.zc_name); 3929 3930 if (flags.recurse && errno == EEXIST) { 3931 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3932 "a child dataset already has a snapshot " 3933 "with the new name")); 3934 (void) zfs_error(hdl, EZFS_EXISTS, errbuf); 3935 } else { 3936 (void) zfs_standard_error(zhp->zfs_hdl, errno, errbuf); 3937 } 3938 3939 /* 3940 * On failure, we still want to remount any filesystems that 3941 * were previously mounted, so we don't alter the system state. 3942 */ 3943 if (!flags.recurse) 3944 (void) changelist_postfix(cl); 3945 } else { 3946 if (!flags.recurse) { 3947 changelist_rename(cl, zfs_get_name(zhp), target); 3948 ret = changelist_postfix(cl); 3949 } 3950 } 3951 3952error: 3953 if (parentname) { 3954 free(parentname); 3955 } 3956 if (zhrp) { 3957 zfs_close(zhrp); 3958 } 3959 if (cl) { 3960 changelist_free(cl); 3961 } 3962 return (ret); 3963} 3964 3965nvlist_t * 3966zfs_get_user_props(zfs_handle_t *zhp) 3967{ 3968 return (zhp->zfs_user_props); 3969} 3970 3971nvlist_t * 3972zfs_get_recvd_props(zfs_handle_t *zhp) 3973{ 3974 if (zhp->zfs_recvd_props == NULL) 3975 if (get_recvd_props_ioctl(zhp) != 0) 3976 return (NULL); 3977 return (zhp->zfs_recvd_props); 3978} 3979 3980/* 3981 * This function is used by 'zfs list' to determine the exact set of columns to 3982 * display, and their maximum widths. This does two main things: 3983 * 3984 * - If this is a list of all properties, then expand the list to include 3985 * all native properties, and set a flag so that for each dataset we look 3986 * for new unique user properties and add them to the list. 3987 * 3988 * - For non fixed-width properties, keep track of the maximum width seen 3989 * so that we can size the column appropriately. If the user has 3990 * requested received property values, we also need to compute the width 3991 * of the RECEIVED column. 3992 */ 3993int 3994zfs_expand_proplist(zfs_handle_t *zhp, zprop_list_t **plp, boolean_t received, 3995 boolean_t literal) 3996{ 3997 libzfs_handle_t *hdl = zhp->zfs_hdl; 3998 zprop_list_t *entry; 3999 zprop_list_t **last, **start; 4000 nvlist_t *userprops, *propval; 4001 nvpair_t *elem; 4002 char *strval; 4003 char buf[ZFS_MAXPROPLEN]; 4004 4005 if (zprop_expand_list(hdl, plp, ZFS_TYPE_DATASET) != 0) 4006 return (-1); 4007 4008 userprops = zfs_get_user_props(zhp); 4009 4010 entry = *plp; 4011 if (entry->pl_all && nvlist_next_nvpair(userprops, NULL) != NULL) { 4012 /* 4013 * Go through and add any user properties as necessary. We 4014 * start by incrementing our list pointer to the first 4015 * non-native property. 4016 */ 4017 start = plp; 4018 while (*start != NULL) { 4019 if ((*start)->pl_prop == ZPROP_INVAL) 4020 break; 4021 start = &(*start)->pl_next; 4022 } 4023 4024 elem = NULL; 4025 while ((elem = nvlist_next_nvpair(userprops, elem)) != NULL) { 4026 /* 4027 * See if we've already found this property in our list. 4028 */ 4029 for (last = start; *last != NULL; 4030 last = &(*last)->pl_next) { 4031 if (strcmp((*last)->pl_user_prop, 4032 nvpair_name(elem)) == 0) 4033 break; 4034 } 4035 4036 if (*last == NULL) { 4037 if ((entry = zfs_alloc(hdl, 4038 sizeof (zprop_list_t))) == NULL || 4039 ((entry->pl_user_prop = zfs_strdup(hdl, 4040 nvpair_name(elem)))) == NULL) { 4041 free(entry); 4042 return (-1); 4043 } 4044 4045 entry->pl_prop = ZPROP_INVAL; 4046 entry->pl_width = strlen(nvpair_name(elem)); 4047 entry->pl_all = B_TRUE; 4048 *last = entry; 4049 } 4050 } 4051 } 4052 4053 /* 4054 * Now go through and check the width of any non-fixed columns 4055 */ 4056 for (entry = *plp; entry != NULL; entry = entry->pl_next) { 4057 if (entry->pl_fixed && !literal) 4058 continue; 4059 4060 if (entry->pl_prop != ZPROP_INVAL) { 4061 if (zfs_prop_get(zhp, entry->pl_prop, 4062 buf, sizeof (buf), NULL, NULL, 0, literal) == 0) { 4063 if (strlen(buf) > entry->pl_width) 4064 entry->pl_width = strlen(buf); 4065 } 4066 if (received && zfs_prop_get_recvd(zhp, 4067 zfs_prop_to_name(entry->pl_prop), 4068 buf, sizeof (buf), literal) == 0) 4069 if (strlen(buf) > entry->pl_recvd_width) 4070 entry->pl_recvd_width = strlen(buf); 4071 } else { 4072 if (nvlist_lookup_nvlist(userprops, entry->pl_user_prop, 4073 &propval) == 0) { 4074 verify(nvlist_lookup_string(propval, 4075 ZPROP_VALUE, &strval) == 0); 4076 if (strlen(strval) > entry->pl_width) 4077 entry->pl_width = strlen(strval); 4078 } 4079 if (received && zfs_prop_get_recvd(zhp, 4080 entry->pl_user_prop, 4081 buf, sizeof (buf), literal) == 0) 4082 if (strlen(buf) > entry->pl_recvd_width) 4083 entry->pl_recvd_width = strlen(buf); 4084 } 4085 } 4086 4087 return (0); 4088} 4089 4090int 4091zfs_deleg_share_nfs(libzfs_handle_t *hdl, char *dataset, char *path, 4092 char *resource, void *export, void *sharetab, 4093 int sharemax, zfs_share_op_t operation) 4094{ 4095 zfs_cmd_t zc = { 0 }; 4096 int error; 4097 4098 (void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name)); 4099 (void) strlcpy(zc.zc_value, path, sizeof (zc.zc_value)); 4100 if (resource) 4101 (void) strlcpy(zc.zc_string, resource, sizeof (zc.zc_string)); 4102 zc.zc_share.z_sharedata = (uint64_t)(uintptr_t)sharetab; 4103 zc.zc_share.z_exportdata = (uint64_t)(uintptr_t)export; 4104 zc.zc_share.z_sharetype = operation; 4105 zc.zc_share.z_sharemax = sharemax; 4106 error = ioctl(hdl->libzfs_fd, ZFS_IOC_SHARE, &zc); 4107 return (error); 4108} 4109 4110void 4111zfs_prune_proplist(zfs_handle_t *zhp, uint8_t *props) 4112{ 4113 nvpair_t *curr; 4114 4115 /* 4116 * Keep a reference to the props-table against which we prune the 4117 * properties. 4118 */ 4119 zhp->zfs_props_table = props; 4120 4121 curr = nvlist_next_nvpair(zhp->zfs_props, NULL); 4122 4123 while (curr) { 4124 zfs_prop_t zfs_prop = zfs_name_to_prop(nvpair_name(curr)); 4125 nvpair_t *next = nvlist_next_nvpair(zhp->zfs_props, curr); 4126 4127 /* 4128 * User properties will result in ZPROP_INVAL, and since we 4129 * only know how to prune standard ZFS properties, we always 4130 * leave these in the list. This can also happen if we 4131 * encounter an unknown DSL property (when running older 4132 * software, for example). 4133 */ 4134 if (zfs_prop != ZPROP_INVAL && props[zfs_prop] == B_FALSE) 4135 (void) nvlist_remove(zhp->zfs_props, 4136 nvpair_name(curr), nvpair_type(curr)); 4137 curr = next; 4138 } 4139} 4140 4141#ifdef sun 4142static int 4143zfs_smb_acl_mgmt(libzfs_handle_t *hdl, char *dataset, char *path, 4144 zfs_smb_acl_op_t cmd, char *resource1, char *resource2) 4145{ 4146 zfs_cmd_t zc = { 0 }; 4147 nvlist_t *nvlist = NULL; 4148 int error; 4149 4150 (void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name)); 4151 (void) strlcpy(zc.zc_value, path, sizeof (zc.zc_value)); 4152 zc.zc_cookie = (uint64_t)cmd; 4153 4154 if (cmd == ZFS_SMB_ACL_RENAME) { 4155 if (nvlist_alloc(&nvlist, NV_UNIQUE_NAME, 0) != 0) { 4156 (void) no_memory(hdl); 4157 return (NULL); 4158 } 4159 } 4160 4161 switch (cmd) { 4162 case ZFS_SMB_ACL_ADD: 4163 case ZFS_SMB_ACL_REMOVE: 4164 (void) strlcpy(zc.zc_string, resource1, sizeof (zc.zc_string)); 4165 break; 4166 case ZFS_SMB_ACL_RENAME: 4167 if (nvlist_add_string(nvlist, ZFS_SMB_ACL_SRC, 4168 resource1) != 0) { 4169 (void) no_memory(hdl); 4170 return (-1); 4171 } 4172 if (nvlist_add_string(nvlist, ZFS_SMB_ACL_TARGET, 4173 resource2) != 0) { 4174 (void) no_memory(hdl); 4175 return (-1); 4176 } 4177 if (zcmd_write_src_nvlist(hdl, &zc, nvlist) != 0) { 4178 nvlist_free(nvlist); 4179 return (-1); 4180 } 4181 break; 4182 case ZFS_SMB_ACL_PURGE: 4183 break; 4184 default: 4185 return (-1); 4186 } 4187 error = ioctl(hdl->libzfs_fd, ZFS_IOC_SMB_ACL, &zc); 4188 if (nvlist) 4189 nvlist_free(nvlist); 4190 return (error); 4191} 4192 4193int 4194zfs_smb_acl_add(libzfs_handle_t *hdl, char *dataset, 4195 char *path, char *resource) 4196{ 4197 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_ADD, 4198 resource, NULL)); 4199} 4200 4201int 4202zfs_smb_acl_remove(libzfs_handle_t *hdl, char *dataset, 4203 char *path, char *resource) 4204{ 4205 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_REMOVE, 4206 resource, NULL)); 4207} 4208 4209int 4210zfs_smb_acl_purge(libzfs_handle_t *hdl, char *dataset, char *path) 4211{ 4212 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_PURGE, 4213 NULL, NULL)); 4214} 4215 4216int 4217zfs_smb_acl_rename(libzfs_handle_t *hdl, char *dataset, char *path, 4218 char *oldname, char *newname) 4219{ 4220 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_RENAME, 4221 oldname, newname)); 4222} 4223#endif /* sun */ 4224 4225int 4226zfs_userspace(zfs_handle_t *zhp, zfs_userquota_prop_t type, 4227 zfs_userspace_cb_t func, void *arg) 4228{ 4229 zfs_cmd_t zc = { 0 }; 4230 zfs_useracct_t buf[100]; 4231 libzfs_handle_t *hdl = zhp->zfs_hdl; 4232 int ret; 4233 4234 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 4235 4236 zc.zc_objset_type = type; 4237 zc.zc_nvlist_dst = (uintptr_t)buf; 4238 4239 for (;;) { 4240 zfs_useracct_t *zua = buf; 4241 4242 zc.zc_nvlist_dst_size = sizeof (buf); 4243 if (zfs_ioctl(hdl, ZFS_IOC_USERSPACE_MANY, &zc) != 0) { 4244 char errbuf[1024]; 4245 4246 (void) snprintf(errbuf, sizeof (errbuf), 4247 dgettext(TEXT_DOMAIN, 4248 "cannot get used/quota for %s"), zc.zc_name); 4249 return (zfs_standard_error_fmt(hdl, errno, errbuf)); 4250 } 4251 if (zc.zc_nvlist_dst_size == 0) 4252 break; 4253 4254 while (zc.zc_nvlist_dst_size > 0) { 4255 if ((ret = func(arg, zua->zu_domain, zua->zu_rid, 4256 zua->zu_space)) != 0) 4257 return (ret); 4258 zua++; 4259 zc.zc_nvlist_dst_size -= sizeof (zfs_useracct_t); 4260 } 4261 } 4262 4263 return (0); 4264} 4265 4266struct holdarg { 4267 nvlist_t *nvl; 4268 const char *snapname; 4269 const char *tag; 4270 boolean_t recursive; 4271 int error; 4272}; 4273 4274static int 4275zfs_hold_one(zfs_handle_t *zhp, void *arg) 4276{ 4277 struct holdarg *ha = arg; 4278 char name[ZFS_MAXNAMELEN]; 4279 int rv = 0; 4280 4281 (void) snprintf(name, sizeof (name), 4282 "%s@%s", zhp->zfs_name, ha->snapname); 4283 4284 if (lzc_exists(name)) 4285 fnvlist_add_string(ha->nvl, name, ha->tag); 4286 4287 if (ha->recursive) 4288 rv = zfs_iter_filesystems(zhp, zfs_hold_one, ha); 4289 zfs_close(zhp); 4290 return (rv); 4291} 4292 4293int 4294zfs_hold(zfs_handle_t *zhp, const char *snapname, const char *tag, 4295 boolean_t recursive, int cleanup_fd) 4296{ 4297 int ret; 4298 struct holdarg ha; 4299 4300 ha.nvl = fnvlist_alloc(); 4301 ha.snapname = snapname; 4302 ha.tag = tag; 4303 ha.recursive = recursive; 4304 (void) zfs_hold_one(zfs_handle_dup(zhp), &ha); 4305 4306 if (nvlist_empty(ha.nvl)) { 4307 char errbuf[1024]; 4308 4309 fnvlist_free(ha.nvl); 4310 ret = ENOENT; 4311 (void) snprintf(errbuf, sizeof (errbuf), 4312 dgettext(TEXT_DOMAIN, 4313 "cannot hold snapshot '%s@%s'"), 4314 zhp->zfs_name, snapname); 4315 (void) zfs_standard_error(zhp->zfs_hdl, ret, errbuf); 4316 return (ret); 4317 } 4318 4319 ret = zfs_hold_nvl(zhp, cleanup_fd, ha.nvl); 4320 fnvlist_free(ha.nvl); 4321 4322 return (ret); 4323} 4324 4325int 4326zfs_hold_nvl(zfs_handle_t *zhp, int cleanup_fd, nvlist_t *holds) 4327{ 4328 int ret; 4329 nvlist_t *errors; 4330 libzfs_handle_t *hdl = zhp->zfs_hdl; 4331 char errbuf[1024]; 4332 nvpair_t *elem; 4333 4334 errors = NULL; 4335 ret = lzc_hold(holds, cleanup_fd, &errors); 4336 4337 if (ret == 0) { 4338 /* There may be errors even in the success case. */ 4339 fnvlist_free(errors); 4340 return (0); 4341 } 4342 4343 if (nvlist_empty(errors)) { 4344 /* no hold-specific errors */ 4345 (void) snprintf(errbuf, sizeof (errbuf), 4346 dgettext(TEXT_DOMAIN, "cannot hold")); 4347 switch (ret) { 4348 case ENOTSUP: 4349 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4350 "pool must be upgraded")); 4351 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf); 4352 break; 4353 case EINVAL: 4354 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf); 4355 break; 4356 default: 4357 (void) zfs_standard_error(hdl, ret, errbuf); 4358 } 4359 } 4360 4361 for (elem = nvlist_next_nvpair(errors, NULL); 4362 elem != NULL; 4363 elem = nvlist_next_nvpair(errors, elem)) { 4364 (void) snprintf(errbuf, sizeof (errbuf), 4365 dgettext(TEXT_DOMAIN, 4366 "cannot hold snapshot '%s'"), nvpair_name(elem)); 4367 switch (fnvpair_value_int32(elem)) { 4368 case E2BIG: 4369 /* 4370 * Temporary tags wind up having the ds object id 4371 * prepended. So even if we passed the length check 4372 * above, it's still possible for the tag to wind 4373 * up being slightly too long. 4374 */ 4375 (void) zfs_error(hdl, EZFS_TAGTOOLONG, errbuf); 4376 break; 4377 case EINVAL: 4378 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf); 4379 break; 4380 case EEXIST: 4381 (void) zfs_error(hdl, EZFS_REFTAG_HOLD, errbuf); 4382 break; 4383 default: 4384 (void) zfs_standard_error(hdl, 4385 fnvpair_value_int32(elem), errbuf); 4386 } 4387 } 4388 4389 fnvlist_free(errors); 4390 return (ret); 4391} 4392 4393static int 4394zfs_release_one(zfs_handle_t *zhp, void *arg) 4395{ 4396 struct holdarg *ha = arg; 4397 char name[ZFS_MAXNAMELEN]; 4398 int rv = 0; 4399 nvlist_t *existing_holds; 4400 4401 (void) snprintf(name, sizeof (name), 4402 "%s@%s", zhp->zfs_name, ha->snapname); 4403 4404 if (lzc_get_holds(name, &existing_holds) != 0) { 4405 ha->error = ENOENT; 4406 } else if (!nvlist_exists(existing_holds, ha->tag)) { 4407 ha->error = ESRCH; 4408 } else { 4409 nvlist_t *torelease = fnvlist_alloc(); 4410 fnvlist_add_boolean(torelease, ha->tag); 4411 fnvlist_add_nvlist(ha->nvl, name, torelease); 4412 fnvlist_free(torelease); 4413 } 4414 4415 if (ha->recursive) 4416 rv = zfs_iter_filesystems(zhp, zfs_release_one, ha); 4417 zfs_close(zhp); 4418 return (rv); 4419} 4420 4421int 4422zfs_release(zfs_handle_t *zhp, const char *snapname, const char *tag, 4423 boolean_t recursive) 4424{ 4425 int ret; 4426 struct holdarg ha; 4427 nvlist_t *errors = NULL; 4428 nvpair_t *elem; 4429 libzfs_handle_t *hdl = zhp->zfs_hdl; 4430 char errbuf[1024]; 4431 4432 ha.nvl = fnvlist_alloc(); 4433 ha.snapname = snapname; 4434 ha.tag = tag; 4435 ha.recursive = recursive; 4436 ha.error = 0; 4437 (void) zfs_release_one(zfs_handle_dup(zhp), &ha); 4438 4439 if (nvlist_empty(ha.nvl)) { 4440 fnvlist_free(ha.nvl); 4441 ret = ha.error; 4442 (void) snprintf(errbuf, sizeof (errbuf), 4443 dgettext(TEXT_DOMAIN, 4444 "cannot release hold from snapshot '%s@%s'"), 4445 zhp->zfs_name, snapname); 4446 if (ret == ESRCH) { 4447 (void) zfs_error(hdl, EZFS_REFTAG_RELE, errbuf); 4448 } else { 4449 (void) zfs_standard_error(hdl, ret, errbuf); 4450 } 4451 return (ret); 4452 } 4453 4454 ret = lzc_release(ha.nvl, &errors); 4455 fnvlist_free(ha.nvl); 4456 4457 if (ret == 0) { 4458 /* There may be errors even in the success case. */ 4459 fnvlist_free(errors); 4460 return (0); 4461 } 4462 4463 if (nvlist_empty(errors)) { 4464 /* no hold-specific errors */ 4465 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 4466 "cannot release")); 4467 switch (errno) { 4468 case ENOTSUP: 4469 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4470 "pool must be upgraded")); 4471 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf); 4472 break; 4473 default: 4474 (void) zfs_standard_error_fmt(hdl, errno, errbuf); 4475 } 4476 } 4477 4478 for (elem = nvlist_next_nvpair(errors, NULL); 4479 elem != NULL; 4480 elem = nvlist_next_nvpair(errors, elem)) { 4481 (void) snprintf(errbuf, sizeof (errbuf), 4482 dgettext(TEXT_DOMAIN, 4483 "cannot release hold from snapshot '%s'"), 4484 nvpair_name(elem)); 4485 switch (fnvpair_value_int32(elem)) { 4486 case ESRCH: 4487 (void) zfs_error(hdl, EZFS_REFTAG_RELE, errbuf); 4488 break; 4489 case EINVAL: 4490 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf); 4491 break; 4492 default: 4493 (void) zfs_standard_error_fmt(hdl, 4494 fnvpair_value_int32(elem), errbuf); 4495 } 4496 } 4497 4498 fnvlist_free(errors); 4499 return (ret); 4500} 4501 4502int 4503zfs_get_fsacl(zfs_handle_t *zhp, nvlist_t **nvl) 4504{ 4505 zfs_cmd_t zc = { 0 }; 4506 libzfs_handle_t *hdl = zhp->zfs_hdl; 4507 int nvsz = 2048; 4508 void *nvbuf; 4509 int err = 0; 4510 char errbuf[1024]; 4511 4512 assert(zhp->zfs_type == ZFS_TYPE_VOLUME || 4513 zhp->zfs_type == ZFS_TYPE_FILESYSTEM); 4514 4515tryagain: 4516 4517 nvbuf = malloc(nvsz); 4518 if (nvbuf == NULL) { 4519 err = (zfs_error(hdl, EZFS_NOMEM, strerror(errno))); 4520 goto out; 4521 } 4522 4523 zc.zc_nvlist_dst_size = nvsz; 4524 zc.zc_nvlist_dst = (uintptr_t)nvbuf; 4525 4526 (void) strlcpy(zc.zc_name, zhp->zfs_name, ZFS_MAXNAMELEN); 4527 4528 if (ioctl(hdl->libzfs_fd, ZFS_IOC_GET_FSACL, &zc) != 0) { 4529 (void) snprintf(errbuf, sizeof (errbuf), 4530 dgettext(TEXT_DOMAIN, "cannot get permissions on '%s'"), 4531 zc.zc_name); 4532 switch (errno) { 4533 case ENOMEM: 4534 free(nvbuf); 4535 nvsz = zc.zc_nvlist_dst_size; 4536 goto tryagain; 4537 4538 case ENOTSUP: 4539 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4540 "pool must be upgraded")); 4541 err = zfs_error(hdl, EZFS_BADVERSION, errbuf); 4542 break; 4543 case EINVAL: 4544 err = zfs_error(hdl, EZFS_BADTYPE, errbuf); 4545 break; 4546 case ENOENT: 4547 err = zfs_error(hdl, EZFS_NOENT, errbuf); 4548 break; 4549 default: 4550 err = zfs_standard_error_fmt(hdl, errno, errbuf); 4551 break; 4552 } 4553 } else { 4554 /* success */ 4555 int rc = nvlist_unpack(nvbuf, zc.zc_nvlist_dst_size, nvl, 0); 4556 if (rc) { 4557 (void) snprintf(errbuf, sizeof (errbuf), dgettext( 4558 TEXT_DOMAIN, "cannot get permissions on '%s'"), 4559 zc.zc_name); 4560 err = zfs_standard_error_fmt(hdl, rc, errbuf); 4561 } 4562 } 4563 4564 free(nvbuf); 4565out: 4566 return (err); 4567} 4568 4569int 4570zfs_set_fsacl(zfs_handle_t *zhp, boolean_t un, nvlist_t *nvl) 4571{ 4572 zfs_cmd_t zc = { 0 }; 4573 libzfs_handle_t *hdl = zhp->zfs_hdl; 4574 char *nvbuf; 4575 char errbuf[1024]; 4576 size_t nvsz; 4577 int err; 4578 4579 assert(zhp->zfs_type == ZFS_TYPE_VOLUME || 4580 zhp->zfs_type == ZFS_TYPE_FILESYSTEM); 4581 4582 err = nvlist_size(nvl, &nvsz, NV_ENCODE_NATIVE); 4583 assert(err == 0); 4584 4585 nvbuf = malloc(nvsz); 4586 4587 err = nvlist_pack(nvl, &nvbuf, &nvsz, NV_ENCODE_NATIVE, 0); 4588 assert(err == 0); 4589 4590 zc.zc_nvlist_src_size = nvsz; 4591 zc.zc_nvlist_src = (uintptr_t)nvbuf; 4592 zc.zc_perm_action = un; 4593 4594 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 4595 4596 if (zfs_ioctl(hdl, ZFS_IOC_SET_FSACL, &zc) != 0) { 4597 (void) snprintf(errbuf, sizeof (errbuf), 4598 dgettext(TEXT_DOMAIN, "cannot set permissions on '%s'"), 4599 zc.zc_name); 4600 switch (errno) { 4601 case ENOTSUP: 4602 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4603 "pool must be upgraded")); 4604 err = zfs_error(hdl, EZFS_BADVERSION, errbuf); 4605 break; 4606 case EINVAL: 4607 err = zfs_error(hdl, EZFS_BADTYPE, errbuf); 4608 break; 4609 case ENOENT: 4610 err = zfs_error(hdl, EZFS_NOENT, errbuf); 4611 break; 4612 default: 4613 err = zfs_standard_error_fmt(hdl, errno, errbuf); 4614 break; 4615 } 4616 } 4617 4618 free(nvbuf); 4619 4620 return (err); 4621} 4622 4623int 4624zfs_get_holds(zfs_handle_t *zhp, nvlist_t **nvl) 4625{ 4626 int err; 4627 char errbuf[1024]; 4628 4629 err = lzc_get_holds(zhp->zfs_name, nvl); 4630 4631 if (err != 0) { 4632 libzfs_handle_t *hdl = zhp->zfs_hdl; 4633 4634 (void) snprintf(errbuf, sizeof (errbuf), 4635 dgettext(TEXT_DOMAIN, "cannot get holds for '%s'"), 4636 zhp->zfs_name); 4637 switch (err) { 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 return (err); 4656} 4657 4658/* 4659 * Convert the zvol's volume size to an appropriate reservation. 4660 * Note: If this routine is updated, it is necessary to update the ZFS test 4661 * suite's shell version in reservation.kshlib. 4662 */ 4663uint64_t 4664zvol_volsize_to_reservation(uint64_t volsize, nvlist_t *props) 4665{ 4666 uint64_t numdb; 4667 uint64_t nblocks, volblocksize; 4668 int ncopies; 4669 char *strval; 4670 4671 if (nvlist_lookup_string(props, 4672 zfs_prop_to_name(ZFS_PROP_COPIES), &strval) == 0) 4673 ncopies = atoi(strval); 4674 else 4675 ncopies = 1; 4676 if (nvlist_lookup_uint64(props, 4677 zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE), 4678 &volblocksize) != 0) 4679 volblocksize = ZVOL_DEFAULT_BLOCKSIZE; 4680 nblocks = volsize/volblocksize; 4681 /* start with metadnode L0-L6 */ 4682 numdb = 7; 4683 /* calculate number of indirects */ 4684 while (nblocks > 1) { 4685 nblocks += DNODES_PER_LEVEL - 1; 4686 nblocks /= DNODES_PER_LEVEL; 4687 numdb += nblocks; 4688 } 4689 numdb *= MIN(SPA_DVAS_PER_BP, ncopies + 1); 4690 volsize *= ncopies; 4691 /* 4692 * this is exactly DN_MAX_INDBLKSHIFT when metadata isn't 4693 * compressed, but in practice they compress down to about 4694 * 1100 bytes 4695 */ 4696 numdb *= 1ULL << DN_MAX_INDBLKSHIFT; 4697 volsize += numdb; 4698 return (volsize); 4699} 4700 4701/* 4702 * Attach/detach the given filesystem to/from the given jail. 4703 */ 4704int 4705zfs_jail(zfs_handle_t *zhp, int jailid, int attach) 4706{ 4707 libzfs_handle_t *hdl = zhp->zfs_hdl; 4708 zfs_cmd_t zc = { 0 }; 4709 char errbuf[1024]; 4710 unsigned long cmd; 4711 int ret; 4712 4713 if (attach) { 4714 (void) snprintf(errbuf, sizeof (errbuf), 4715 dgettext(TEXT_DOMAIN, "cannot jail '%s'"), zhp->zfs_name); 4716 } else { 4717 (void) snprintf(errbuf, sizeof (errbuf), 4718 dgettext(TEXT_DOMAIN, "cannot unjail '%s'"), zhp->zfs_name); 4719 } 4720 4721 switch (zhp->zfs_type) { 4722 case ZFS_TYPE_VOLUME: 4723 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4724 "volumes can not be jailed")); 4725 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 4726 case ZFS_TYPE_SNAPSHOT: 4727 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4728 "snapshots can not be jailed")); 4729 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 4730 } 4731 assert(zhp->zfs_type == ZFS_TYPE_FILESYSTEM); 4732 4733 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 4734 zc.zc_objset_type = DMU_OST_ZFS; 4735 zc.zc_jailid = jailid; 4736 4737 cmd = attach ? ZFS_IOC_JAIL : ZFS_IOC_UNJAIL; 4738 if ((ret = ioctl(hdl->libzfs_fd, cmd, &zc)) != 0) 4739 zfs_standard_error(hdl, errno, errbuf); 4740 4741 return (ret); 4742} 4743