libzfs_dataset.c revision 310069
1/* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22/* 23 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 24 * Copyright (c) 2013, Joyent, Inc. All rights reserved. 25 * Copyright (c) 2011, 2015 by Delphix. All rights reserved. 26 * Copyright (c) 2012 DEY Storage Systems, Inc. All rights reserved. 27 * Copyright (c) 2011-2012 Pawel Jakub Dawidek. All rights reserved. 28 * Copyright (c) 2013 Martin Matuska. All rights reserved. 29 * Copyright (c) 2013 Steven Hartland. All rights reserved. 30 * Copyright (c) 2014 Integros [integros.com] 31 * Copyright 2016 Igor Kozhukhov <ikozhukhov@gmail.com> 32 * Copyright 2016 Nexenta Systems, Inc. 33 */ 34 35#include <ctype.h> 36#include <errno.h> 37#include <libintl.h> 38#include <math.h> 39#include <stdio.h> 40#include <stdlib.h> 41#include <strings.h> 42#include <unistd.h> 43#include <stddef.h> 44#include <zone.h> 45#include <fcntl.h> 46#include <sys/mntent.h> 47#include <sys/mount.h> 48#include <priv.h> 49#include <pwd.h> 50#include <grp.h> 51#include <stddef.h> 52#include <idmap.h> 53 54#include <sys/dnode.h> 55#include <sys/spa.h> 56#include <sys/zap.h> 57#include <sys/misc.h> 58#include <libzfs.h> 59 60#include "zfs_namecheck.h" 61#include "zfs_prop.h" 62#include "libzfs_impl.h" 63#include "zfs_deleg.h" 64 65static int userquota_propname_decode(const char *propname, boolean_t zoned, 66 zfs_userquota_prop_t *typep, char *domain, int domainlen, uint64_t *ridp); 67 68/* 69 * Given a single type (not a mask of types), return the type in a human 70 * readable form. 71 */ 72const char * 73zfs_type_to_name(zfs_type_t type) 74{ 75 switch (type) { 76 case ZFS_TYPE_FILESYSTEM: 77 return (dgettext(TEXT_DOMAIN, "filesystem")); 78 case ZFS_TYPE_SNAPSHOT: 79 return (dgettext(TEXT_DOMAIN, "snapshot")); 80 case ZFS_TYPE_VOLUME: 81 return (dgettext(TEXT_DOMAIN, "volume")); 82 case ZFS_TYPE_POOL: 83 return (dgettext(TEXT_DOMAIN, "pool")); 84 case ZFS_TYPE_BOOKMARK: 85 return (dgettext(TEXT_DOMAIN, "bookmark")); 86 default: 87 assert(!"unhandled zfs_type_t"); 88 } 89 90 return (NULL); 91} 92 93/* 94 * Validate a ZFS path. This is used even before trying to open the dataset, to 95 * provide a more meaningful error message. We call zfs_error_aux() to 96 * explain exactly why the name was not valid. 97 */ 98int 99zfs_validate_name(libzfs_handle_t *hdl, const char *path, int type, 100 boolean_t modifying) 101{ 102 namecheck_err_t why; 103 char what; 104 105 (void) zfs_prop_get_table(); 106 if (dataset_namecheck(path, &why, &what) != 0) { 107 if (hdl != NULL) { 108 switch (why) { 109 case NAME_ERR_TOOLONG: 110 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 111 "name is too long")); 112 break; 113 114 case NAME_ERR_LEADING_SLASH: 115 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 116 "leading slash in name")); 117 break; 118 119 case NAME_ERR_EMPTY_COMPONENT: 120 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 121 "empty component in name")); 122 break; 123 124 case NAME_ERR_TRAILING_SLASH: 125 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 126 "trailing slash in name")); 127 break; 128 129 case NAME_ERR_INVALCHAR: 130 zfs_error_aux(hdl, 131 dgettext(TEXT_DOMAIN, "invalid character " 132 "'%c' in name"), what); 133 break; 134 135 case NAME_ERR_MULTIPLE_AT: 136 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 137 "multiple '@' delimiters in name")); 138 break; 139 140 case NAME_ERR_NOLETTER: 141 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 142 "pool doesn't begin with a letter")); 143 break; 144 145 case NAME_ERR_RESERVED: 146 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 147 "name is reserved")); 148 break; 149 150 case NAME_ERR_DISKLIKE: 151 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 152 "reserved disk name")); 153 break; 154 155 default: 156 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 157 "(%d) not defined"), why); 158 break; 159 } 160 } 161 162 return (0); 163 } 164 165 if (!(type & ZFS_TYPE_SNAPSHOT) && strchr(path, '@') != NULL) { 166 if (hdl != NULL) 167 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 168 "snapshot delimiter '@' in filesystem name")); 169 return (0); 170 } 171 172 if (type == ZFS_TYPE_SNAPSHOT && strchr(path, '@') == NULL) { 173 if (hdl != NULL) 174 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 175 "missing '@' delimiter in snapshot name")); 176 return (0); 177 } 178 179 if (modifying && strchr(path, '%') != NULL) { 180 if (hdl != NULL) 181 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 182 "invalid character %c in name"), '%'); 183 return (0); 184 } 185 186 return (-1); 187} 188 189int 190zfs_name_valid(const char *name, zfs_type_t type) 191{ 192 if (type == ZFS_TYPE_POOL) 193 return (zpool_name_valid(NULL, B_FALSE, name)); 194 return (zfs_validate_name(NULL, name, type, B_FALSE)); 195} 196 197/* 198 * This function takes the raw DSL properties, and filters out the user-defined 199 * properties into a separate nvlist. 200 */ 201static nvlist_t * 202process_user_props(zfs_handle_t *zhp, nvlist_t *props) 203{ 204 libzfs_handle_t *hdl = zhp->zfs_hdl; 205 nvpair_t *elem; 206 nvlist_t *propval; 207 nvlist_t *nvl; 208 209 if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0) { 210 (void) no_memory(hdl); 211 return (NULL); 212 } 213 214 elem = NULL; 215 while ((elem = nvlist_next_nvpair(props, elem)) != NULL) { 216 if (!zfs_prop_user(nvpair_name(elem))) 217 continue; 218 219 verify(nvpair_value_nvlist(elem, &propval) == 0); 220 if (nvlist_add_nvlist(nvl, nvpair_name(elem), propval) != 0) { 221 nvlist_free(nvl); 222 (void) no_memory(hdl); 223 return (NULL); 224 } 225 } 226 227 return (nvl); 228} 229 230static zpool_handle_t * 231zpool_add_handle(zfs_handle_t *zhp, const char *pool_name) 232{ 233 libzfs_handle_t *hdl = zhp->zfs_hdl; 234 zpool_handle_t *zph; 235 236 if ((zph = zpool_open_canfail(hdl, pool_name)) != NULL) { 237 if (hdl->libzfs_pool_handles != NULL) 238 zph->zpool_next = hdl->libzfs_pool_handles; 239 hdl->libzfs_pool_handles = zph; 240 } 241 return (zph); 242} 243 244static zpool_handle_t * 245zpool_find_handle(zfs_handle_t *zhp, const char *pool_name, int len) 246{ 247 libzfs_handle_t *hdl = zhp->zfs_hdl; 248 zpool_handle_t *zph = hdl->libzfs_pool_handles; 249 250 while ((zph != NULL) && 251 (strncmp(pool_name, zpool_get_name(zph), len) != 0)) 252 zph = zph->zpool_next; 253 return (zph); 254} 255 256/* 257 * Returns a handle to the pool that contains the provided dataset. 258 * If a handle to that pool already exists then that handle is returned. 259 * Otherwise, a new handle is created and added to the list of handles. 260 */ 261static zpool_handle_t * 262zpool_handle(zfs_handle_t *zhp) 263{ 264 char *pool_name; 265 int len; 266 zpool_handle_t *zph; 267 268 len = strcspn(zhp->zfs_name, "/@#") + 1; 269 pool_name = zfs_alloc(zhp->zfs_hdl, len); 270 (void) strlcpy(pool_name, zhp->zfs_name, len); 271 272 zph = zpool_find_handle(zhp, pool_name, len); 273 if (zph == NULL) 274 zph = zpool_add_handle(zhp, pool_name); 275 276 free(pool_name); 277 return (zph); 278} 279 280void 281zpool_free_handles(libzfs_handle_t *hdl) 282{ 283 zpool_handle_t *next, *zph = hdl->libzfs_pool_handles; 284 285 while (zph != NULL) { 286 next = zph->zpool_next; 287 zpool_close(zph); 288 zph = next; 289 } 290 hdl->libzfs_pool_handles = NULL; 291} 292 293/* 294 * Utility function to gather stats (objset and zpl) for the given object. 295 */ 296static int 297get_stats_ioctl(zfs_handle_t *zhp, zfs_cmd_t *zc) 298{ 299 libzfs_handle_t *hdl = zhp->zfs_hdl; 300 301 (void) strlcpy(zc->zc_name, zhp->zfs_name, sizeof (zc->zc_name)); 302 303 while (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_STATS, zc) != 0) { 304 if (errno == ENOMEM) { 305 if (zcmd_expand_dst_nvlist(hdl, zc) != 0) { 306 return (-1); 307 } 308 } else { 309 return (-1); 310 } 311 } 312 return (0); 313} 314 315/* 316 * Utility function to get the received properties of the given object. 317 */ 318static int 319get_recvd_props_ioctl(zfs_handle_t *zhp) 320{ 321 libzfs_handle_t *hdl = zhp->zfs_hdl; 322 nvlist_t *recvdprops; 323 zfs_cmd_t zc = { 0 }; 324 int err; 325 326 if (zcmd_alloc_dst_nvlist(hdl, &zc, 0) != 0) 327 return (-1); 328 329 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 330 331 while (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_RECVD_PROPS, &zc) != 0) { 332 if (errno == ENOMEM) { 333 if (zcmd_expand_dst_nvlist(hdl, &zc) != 0) { 334 return (-1); 335 } 336 } else { 337 zcmd_free_nvlists(&zc); 338 return (-1); 339 } 340 } 341 342 err = zcmd_read_dst_nvlist(zhp->zfs_hdl, &zc, &recvdprops); 343 zcmd_free_nvlists(&zc); 344 if (err != 0) 345 return (-1); 346 347 nvlist_free(zhp->zfs_recvd_props); 348 zhp->zfs_recvd_props = recvdprops; 349 350 return (0); 351} 352 353static int 354put_stats_zhdl(zfs_handle_t *zhp, zfs_cmd_t *zc) 355{ 356 nvlist_t *allprops, *userprops; 357 358 zhp->zfs_dmustats = zc->zc_objset_stats; /* structure assignment */ 359 360 if (zcmd_read_dst_nvlist(zhp->zfs_hdl, zc, &allprops) != 0) { 361 return (-1); 362 } 363 364 /* 365 * XXX Why do we store the user props separately, in addition to 366 * storing them in zfs_props? 367 */ 368 if ((userprops = process_user_props(zhp, allprops)) == NULL) { 369 nvlist_free(allprops); 370 return (-1); 371 } 372 373 nvlist_free(zhp->zfs_props); 374 nvlist_free(zhp->zfs_user_props); 375 376 zhp->zfs_props = allprops; 377 zhp->zfs_user_props = userprops; 378 379 return (0); 380} 381 382static int 383get_stats(zfs_handle_t *zhp) 384{ 385 int rc = 0; 386 zfs_cmd_t zc = { 0 }; 387 388 if (zcmd_alloc_dst_nvlist(zhp->zfs_hdl, &zc, 0) != 0) 389 return (-1); 390 if (get_stats_ioctl(zhp, &zc) != 0) 391 rc = -1; 392 else if (put_stats_zhdl(zhp, &zc) != 0) 393 rc = -1; 394 zcmd_free_nvlists(&zc); 395 return (rc); 396} 397 398/* 399 * Refresh the properties currently stored in the handle. 400 */ 401void 402zfs_refresh_properties(zfs_handle_t *zhp) 403{ 404 (void) get_stats(zhp); 405} 406 407/* 408 * Makes a handle from the given dataset name. Used by zfs_open() and 409 * zfs_iter_* to create child handles on the fly. 410 */ 411static int 412make_dataset_handle_common(zfs_handle_t *zhp, zfs_cmd_t *zc) 413{ 414 if (put_stats_zhdl(zhp, zc) != 0) 415 return (-1); 416 417 /* 418 * We've managed to open the dataset and gather statistics. Determine 419 * the high-level type. 420 */ 421 if (zhp->zfs_dmustats.dds_type == DMU_OST_ZVOL) 422 zhp->zfs_head_type = ZFS_TYPE_VOLUME; 423 else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZFS) 424 zhp->zfs_head_type = ZFS_TYPE_FILESYSTEM; 425 else 426 abort(); 427 428 if (zhp->zfs_dmustats.dds_is_snapshot) 429 zhp->zfs_type = ZFS_TYPE_SNAPSHOT; 430 else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZVOL) 431 zhp->zfs_type = ZFS_TYPE_VOLUME; 432 else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZFS) 433 zhp->zfs_type = ZFS_TYPE_FILESYSTEM; 434 else 435 abort(); /* we should never see any other types */ 436 437 if ((zhp->zpool_hdl = zpool_handle(zhp)) == NULL) 438 return (-1); 439 440 return (0); 441} 442 443zfs_handle_t * 444make_dataset_handle(libzfs_handle_t *hdl, const char *path) 445{ 446 zfs_cmd_t zc = { 0 }; 447 448 zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1); 449 450 if (zhp == NULL) 451 return (NULL); 452 453 zhp->zfs_hdl = hdl; 454 (void) strlcpy(zhp->zfs_name, path, sizeof (zhp->zfs_name)); 455 if (zcmd_alloc_dst_nvlist(hdl, &zc, 0) != 0) { 456 free(zhp); 457 return (NULL); 458 } 459 if (get_stats_ioctl(zhp, &zc) == -1) { 460 zcmd_free_nvlists(&zc); 461 free(zhp); 462 return (NULL); 463 } 464 if (make_dataset_handle_common(zhp, &zc) == -1) { 465 free(zhp); 466 zhp = NULL; 467 } 468 zcmd_free_nvlists(&zc); 469 return (zhp); 470} 471 472zfs_handle_t * 473make_dataset_handle_zc(libzfs_handle_t *hdl, zfs_cmd_t *zc) 474{ 475 zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1); 476 477 if (zhp == NULL) 478 return (NULL); 479 480 zhp->zfs_hdl = hdl; 481 (void) strlcpy(zhp->zfs_name, zc->zc_name, sizeof (zhp->zfs_name)); 482 if (make_dataset_handle_common(zhp, zc) == -1) { 483 free(zhp); 484 return (NULL); 485 } 486 return (zhp); 487} 488 489zfs_handle_t * 490make_dataset_simple_handle_zc(zfs_handle_t *pzhp, zfs_cmd_t *zc) 491{ 492 zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1); 493 494 if (zhp == NULL) 495 return (NULL); 496 497 zhp->zfs_hdl = pzhp->zfs_hdl; 498 (void) strlcpy(zhp->zfs_name, zc->zc_name, sizeof (zhp->zfs_name)); 499 zhp->zfs_head_type = pzhp->zfs_type; 500 zhp->zfs_type = ZFS_TYPE_SNAPSHOT; 501 zhp->zpool_hdl = zpool_handle(zhp); 502 return (zhp); 503} 504 505zfs_handle_t * 506zfs_handle_dup(zfs_handle_t *zhp_orig) 507{ 508 zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1); 509 510 if (zhp == NULL) 511 return (NULL); 512 513 zhp->zfs_hdl = zhp_orig->zfs_hdl; 514 zhp->zpool_hdl = zhp_orig->zpool_hdl; 515 (void) strlcpy(zhp->zfs_name, zhp_orig->zfs_name, 516 sizeof (zhp->zfs_name)); 517 zhp->zfs_type = zhp_orig->zfs_type; 518 zhp->zfs_head_type = zhp_orig->zfs_head_type; 519 zhp->zfs_dmustats = zhp_orig->zfs_dmustats; 520 if (zhp_orig->zfs_props != NULL) { 521 if (nvlist_dup(zhp_orig->zfs_props, &zhp->zfs_props, 0) != 0) { 522 (void) no_memory(zhp->zfs_hdl); 523 zfs_close(zhp); 524 return (NULL); 525 } 526 } 527 if (zhp_orig->zfs_user_props != NULL) { 528 if (nvlist_dup(zhp_orig->zfs_user_props, 529 &zhp->zfs_user_props, 0) != 0) { 530 (void) no_memory(zhp->zfs_hdl); 531 zfs_close(zhp); 532 return (NULL); 533 } 534 } 535 if (zhp_orig->zfs_recvd_props != NULL) { 536 if (nvlist_dup(zhp_orig->zfs_recvd_props, 537 &zhp->zfs_recvd_props, 0)) { 538 (void) no_memory(zhp->zfs_hdl); 539 zfs_close(zhp); 540 return (NULL); 541 } 542 } 543 zhp->zfs_mntcheck = zhp_orig->zfs_mntcheck; 544 if (zhp_orig->zfs_mntopts != NULL) { 545 zhp->zfs_mntopts = zfs_strdup(zhp_orig->zfs_hdl, 546 zhp_orig->zfs_mntopts); 547 } 548 zhp->zfs_props_table = zhp_orig->zfs_props_table; 549 return (zhp); 550} 551 552boolean_t 553zfs_bookmark_exists(const char *path) 554{ 555 nvlist_t *bmarks; 556 nvlist_t *props; 557 char fsname[ZFS_MAX_DATASET_NAME_LEN]; 558 char *bmark_name; 559 char *pound; 560 int err; 561 boolean_t rv; 562 563 564 (void) strlcpy(fsname, path, sizeof (fsname)); 565 pound = strchr(fsname, '#'); 566 if (pound == NULL) 567 return (B_FALSE); 568 569 *pound = '\0'; 570 bmark_name = pound + 1; 571 props = fnvlist_alloc(); 572 err = lzc_get_bookmarks(fsname, props, &bmarks); 573 nvlist_free(props); 574 if (err != 0) { 575 nvlist_free(bmarks); 576 return (B_FALSE); 577 } 578 579 rv = nvlist_exists(bmarks, bmark_name); 580 nvlist_free(bmarks); 581 return (rv); 582} 583 584zfs_handle_t * 585make_bookmark_handle(zfs_handle_t *parent, const char *path, 586 nvlist_t *bmark_props) 587{ 588 zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1); 589 590 if (zhp == NULL) 591 return (NULL); 592 593 /* Fill in the name. */ 594 zhp->zfs_hdl = parent->zfs_hdl; 595 (void) strlcpy(zhp->zfs_name, path, sizeof (zhp->zfs_name)); 596 597 /* Set the property lists. */ 598 if (nvlist_dup(bmark_props, &zhp->zfs_props, 0) != 0) { 599 free(zhp); 600 return (NULL); 601 } 602 603 /* Set the types. */ 604 zhp->zfs_head_type = parent->zfs_head_type; 605 zhp->zfs_type = ZFS_TYPE_BOOKMARK; 606 607 if ((zhp->zpool_hdl = zpool_handle(zhp)) == NULL) { 608 nvlist_free(zhp->zfs_props); 609 free(zhp); 610 return (NULL); 611 } 612 613 return (zhp); 614} 615 616/* 617 * Opens the given snapshot, filesystem, or volume. The 'types' 618 * argument is a mask of acceptable types. The function will print an 619 * appropriate error message and return NULL if it can't be opened. 620 */ 621zfs_handle_t * 622zfs_open(libzfs_handle_t *hdl, const char *path, int types) 623{ 624 zfs_handle_t *zhp; 625 char errbuf[1024]; 626 627 (void) snprintf(errbuf, sizeof (errbuf), 628 dgettext(TEXT_DOMAIN, "cannot open '%s'"), path); 629 630 /* 631 * Validate the name before we even try to open it. 632 */ 633 if (!zfs_validate_name(hdl, path, ZFS_TYPE_DATASET, B_FALSE)) { 634 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 635 "invalid dataset name")); 636 (void) zfs_error(hdl, EZFS_INVALIDNAME, errbuf); 637 return (NULL); 638 } 639 640 /* 641 * Try to get stats for the dataset, which will tell us if it exists. 642 */ 643 errno = 0; 644 if ((zhp = make_dataset_handle(hdl, path)) == NULL) { 645 (void) zfs_standard_error(hdl, errno, errbuf); 646 return (NULL); 647 } 648 649 if (zhp == NULL) { 650 char *at = strchr(path, '@'); 651 652 if (at != NULL) 653 *at = '\0'; 654 errno = 0; 655 if ((zhp = make_dataset_handle(hdl, path)) == NULL) { 656 (void) zfs_standard_error(hdl, errno, errbuf); 657 return (NULL); 658 } 659 if (at != NULL) 660 *at = '@'; 661 (void) strlcpy(zhp->zfs_name, path, sizeof (zhp->zfs_name)); 662 zhp->zfs_type = ZFS_TYPE_SNAPSHOT; 663 } 664 665 if (!(types & zhp->zfs_type)) { 666 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf); 667 zfs_close(zhp); 668 return (NULL); 669 } 670 671 return (zhp); 672} 673 674/* 675 * Release a ZFS handle. Nothing to do but free the associated memory. 676 */ 677void 678zfs_close(zfs_handle_t *zhp) 679{ 680 if (zhp->zfs_mntopts) 681 free(zhp->zfs_mntopts); 682 nvlist_free(zhp->zfs_props); 683 nvlist_free(zhp->zfs_user_props); 684 nvlist_free(zhp->zfs_recvd_props); 685 free(zhp); 686} 687 688typedef struct mnttab_node { 689 struct mnttab mtn_mt; 690 avl_node_t mtn_node; 691} mnttab_node_t; 692 693static int 694libzfs_mnttab_cache_compare(const void *arg1, const void *arg2) 695{ 696 const mnttab_node_t *mtn1 = arg1; 697 const mnttab_node_t *mtn2 = arg2; 698 int rv; 699 700 rv = strcmp(mtn1->mtn_mt.mnt_special, mtn2->mtn_mt.mnt_special); 701 702 if (rv == 0) 703 return (0); 704 return (rv > 0 ? 1 : -1); 705} 706 707void 708libzfs_mnttab_init(libzfs_handle_t *hdl) 709{ 710 assert(avl_numnodes(&hdl->libzfs_mnttab_cache) == 0); 711 avl_create(&hdl->libzfs_mnttab_cache, libzfs_mnttab_cache_compare, 712 sizeof (mnttab_node_t), offsetof(mnttab_node_t, mtn_node)); 713} 714 715void 716libzfs_mnttab_update(libzfs_handle_t *hdl) 717{ 718 struct mnttab entry; 719 720 rewind(hdl->libzfs_mnttab); 721 while (getmntent(hdl->libzfs_mnttab, &entry) == 0) { 722 mnttab_node_t *mtn; 723 724 if (strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0) 725 continue; 726 mtn = zfs_alloc(hdl, sizeof (mnttab_node_t)); 727 mtn->mtn_mt.mnt_special = zfs_strdup(hdl, entry.mnt_special); 728 mtn->mtn_mt.mnt_mountp = zfs_strdup(hdl, entry.mnt_mountp); 729 mtn->mtn_mt.mnt_fstype = zfs_strdup(hdl, entry.mnt_fstype); 730 mtn->mtn_mt.mnt_mntopts = zfs_strdup(hdl, entry.mnt_mntopts); 731 avl_add(&hdl->libzfs_mnttab_cache, mtn); 732 } 733} 734 735void 736libzfs_mnttab_fini(libzfs_handle_t *hdl) 737{ 738 void *cookie = NULL; 739 mnttab_node_t *mtn; 740 741 while ((mtn = avl_destroy_nodes(&hdl->libzfs_mnttab_cache, &cookie)) 742 != NULL) { 743 free(mtn->mtn_mt.mnt_special); 744 free(mtn->mtn_mt.mnt_mountp); 745 free(mtn->mtn_mt.mnt_fstype); 746 free(mtn->mtn_mt.mnt_mntopts); 747 free(mtn); 748 } 749 avl_destroy(&hdl->libzfs_mnttab_cache); 750} 751 752void 753libzfs_mnttab_cache(libzfs_handle_t *hdl, boolean_t enable) 754{ 755 hdl->libzfs_mnttab_enable = enable; 756} 757 758int 759libzfs_mnttab_find(libzfs_handle_t *hdl, const char *fsname, 760 struct mnttab *entry) 761{ 762 mnttab_node_t find; 763 mnttab_node_t *mtn; 764 765 if (!hdl->libzfs_mnttab_enable) { 766 struct mnttab srch = { 0 }; 767 768 if (avl_numnodes(&hdl->libzfs_mnttab_cache)) 769 libzfs_mnttab_fini(hdl); 770 rewind(hdl->libzfs_mnttab); 771 srch.mnt_special = (char *)fsname; 772 srch.mnt_fstype = MNTTYPE_ZFS; 773 if (getmntany(hdl->libzfs_mnttab, entry, &srch) == 0) 774 return (0); 775 else 776 return (ENOENT); 777 } 778 779 if (avl_numnodes(&hdl->libzfs_mnttab_cache) == 0) 780 libzfs_mnttab_update(hdl); 781 782 find.mtn_mt.mnt_special = (char *)fsname; 783 mtn = avl_find(&hdl->libzfs_mnttab_cache, &find, NULL); 784 if (mtn) { 785 *entry = mtn->mtn_mt; 786 return (0); 787 } 788 return (ENOENT); 789} 790 791void 792libzfs_mnttab_add(libzfs_handle_t *hdl, const char *special, 793 const char *mountp, const char *mntopts) 794{ 795 mnttab_node_t *mtn; 796 797 if (avl_numnodes(&hdl->libzfs_mnttab_cache) == 0) 798 return; 799 mtn = zfs_alloc(hdl, sizeof (mnttab_node_t)); 800 mtn->mtn_mt.mnt_special = zfs_strdup(hdl, special); 801 mtn->mtn_mt.mnt_mountp = zfs_strdup(hdl, mountp); 802 mtn->mtn_mt.mnt_fstype = zfs_strdup(hdl, MNTTYPE_ZFS); 803 mtn->mtn_mt.mnt_mntopts = zfs_strdup(hdl, mntopts); 804 avl_add(&hdl->libzfs_mnttab_cache, mtn); 805} 806 807void 808libzfs_mnttab_remove(libzfs_handle_t *hdl, const char *fsname) 809{ 810 mnttab_node_t find; 811 mnttab_node_t *ret; 812 813 find.mtn_mt.mnt_special = (char *)fsname; 814 if ((ret = avl_find(&hdl->libzfs_mnttab_cache, (void *)&find, NULL)) 815 != NULL) { 816 avl_remove(&hdl->libzfs_mnttab_cache, ret); 817 free(ret->mtn_mt.mnt_special); 818 free(ret->mtn_mt.mnt_mountp); 819 free(ret->mtn_mt.mnt_fstype); 820 free(ret->mtn_mt.mnt_mntopts); 821 free(ret); 822 } 823} 824 825int 826zfs_spa_version(zfs_handle_t *zhp, int *spa_version) 827{ 828 zpool_handle_t *zpool_handle = zhp->zpool_hdl; 829 830 if (zpool_handle == NULL) 831 return (-1); 832 833 *spa_version = zpool_get_prop_int(zpool_handle, 834 ZPOOL_PROP_VERSION, NULL); 835 return (0); 836} 837 838/* 839 * The choice of reservation property depends on the SPA version. 840 */ 841static int 842zfs_which_resv_prop(zfs_handle_t *zhp, zfs_prop_t *resv_prop) 843{ 844 int spa_version; 845 846 if (zfs_spa_version(zhp, &spa_version) < 0) 847 return (-1); 848 849 if (spa_version >= SPA_VERSION_REFRESERVATION) 850 *resv_prop = ZFS_PROP_REFRESERVATION; 851 else 852 *resv_prop = ZFS_PROP_RESERVATION; 853 854 return (0); 855} 856 857/* 858 * Given an nvlist of properties to set, validates that they are correct, and 859 * parses any numeric properties (index, boolean, etc) if they are specified as 860 * strings. 861 */ 862nvlist_t * 863zfs_valid_proplist(libzfs_handle_t *hdl, zfs_type_t type, nvlist_t *nvl, 864 uint64_t zoned, zfs_handle_t *zhp, zpool_handle_t *zpool_hdl, 865 const char *errbuf) 866{ 867 nvpair_t *elem; 868 uint64_t intval; 869 char *strval; 870 zfs_prop_t prop; 871 nvlist_t *ret; 872 int chosen_normal = -1; 873 int chosen_utf = -1; 874 875 if (nvlist_alloc(&ret, NV_UNIQUE_NAME, 0) != 0) { 876 (void) no_memory(hdl); 877 return (NULL); 878 } 879 880 /* 881 * Make sure this property is valid and applies to this type. 882 */ 883 884 elem = NULL; 885 while ((elem = nvlist_next_nvpair(nvl, elem)) != NULL) { 886 const char *propname = nvpair_name(elem); 887 888 prop = zfs_name_to_prop(propname); 889 if (prop == ZPROP_INVAL && zfs_prop_user(propname)) { 890 /* 891 * This is a user property: make sure it's a 892 * string, and that it's less than ZAP_MAXNAMELEN. 893 */ 894 if (nvpair_type(elem) != DATA_TYPE_STRING) { 895 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 896 "'%s' must be a string"), propname); 897 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 898 goto error; 899 } 900 901 if (strlen(nvpair_name(elem)) >= ZAP_MAXNAMELEN) { 902 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 903 "property name '%s' is too long"), 904 propname); 905 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 906 goto error; 907 } 908 909 (void) nvpair_value_string(elem, &strval); 910 if (nvlist_add_string(ret, propname, strval) != 0) { 911 (void) no_memory(hdl); 912 goto error; 913 } 914 continue; 915 } 916 917 /* 918 * Currently, only user properties can be modified on 919 * snapshots. 920 */ 921 if (type == ZFS_TYPE_SNAPSHOT) { 922 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 923 "this property can not be modified for snapshots")); 924 (void) zfs_error(hdl, EZFS_PROPTYPE, errbuf); 925 goto error; 926 } 927 928 if (prop == ZPROP_INVAL && zfs_prop_userquota(propname)) { 929 zfs_userquota_prop_t uqtype; 930 char newpropname[128]; 931 char domain[128]; 932 uint64_t rid; 933 uint64_t valary[3]; 934 935 if (userquota_propname_decode(propname, zoned, 936 &uqtype, domain, sizeof (domain), &rid) != 0) { 937 zfs_error_aux(hdl, 938 dgettext(TEXT_DOMAIN, 939 "'%s' has an invalid user/group name"), 940 propname); 941 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 942 goto error; 943 } 944 945 if (uqtype != ZFS_PROP_USERQUOTA && 946 uqtype != ZFS_PROP_GROUPQUOTA) { 947 zfs_error_aux(hdl, 948 dgettext(TEXT_DOMAIN, "'%s' is readonly"), 949 propname); 950 (void) zfs_error(hdl, EZFS_PROPREADONLY, 951 errbuf); 952 goto error; 953 } 954 955 if (nvpair_type(elem) == DATA_TYPE_STRING) { 956 (void) nvpair_value_string(elem, &strval); 957 if (strcmp(strval, "none") == 0) { 958 intval = 0; 959 } else if (zfs_nicestrtonum(hdl, 960 strval, &intval) != 0) { 961 (void) zfs_error(hdl, 962 EZFS_BADPROP, errbuf); 963 goto error; 964 } 965 } else if (nvpair_type(elem) == 966 DATA_TYPE_UINT64) { 967 (void) nvpair_value_uint64(elem, &intval); 968 if (intval == 0) { 969 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 970 "use 'none' to disable " 971 "userquota/groupquota")); 972 goto error; 973 } 974 } else { 975 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 976 "'%s' must be a number"), propname); 977 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 978 goto error; 979 } 980 981 /* 982 * Encode the prop name as 983 * userquota@<hex-rid>-domain, to make it easy 984 * for the kernel to decode. 985 */ 986 (void) snprintf(newpropname, sizeof (newpropname), 987 "%s%llx-%s", zfs_userquota_prop_prefixes[uqtype], 988 (longlong_t)rid, domain); 989 valary[0] = uqtype; 990 valary[1] = rid; 991 valary[2] = intval; 992 if (nvlist_add_uint64_array(ret, newpropname, 993 valary, 3) != 0) { 994 (void) no_memory(hdl); 995 goto error; 996 } 997 continue; 998 } else if (prop == ZPROP_INVAL && zfs_prop_written(propname)) { 999 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1000 "'%s' is readonly"), 1001 propname); 1002 (void) zfs_error(hdl, EZFS_PROPREADONLY, errbuf); 1003 goto error; 1004 } 1005 1006 if (prop == ZPROP_INVAL) { 1007 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1008 "invalid property '%s'"), propname); 1009 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1010 goto error; 1011 } 1012 1013 if (!zfs_prop_valid_for_type(prop, type)) { 1014 zfs_error_aux(hdl, 1015 dgettext(TEXT_DOMAIN, "'%s' does not " 1016 "apply to datasets of this type"), propname); 1017 (void) zfs_error(hdl, EZFS_PROPTYPE, errbuf); 1018 goto error; 1019 } 1020 1021 if (zfs_prop_readonly(prop) && 1022 (!zfs_prop_setonce(prop) || zhp != NULL)) { 1023 zfs_error_aux(hdl, 1024 dgettext(TEXT_DOMAIN, "'%s' is readonly"), 1025 propname); 1026 (void) zfs_error(hdl, EZFS_PROPREADONLY, errbuf); 1027 goto error; 1028 } 1029 1030 if (zprop_parse_value(hdl, elem, prop, type, ret, 1031 &strval, &intval, errbuf) != 0) 1032 goto error; 1033 1034 /* 1035 * Perform some additional checks for specific properties. 1036 */ 1037 switch (prop) { 1038 case ZFS_PROP_VERSION: 1039 { 1040 int version; 1041 1042 if (zhp == NULL) 1043 break; 1044 version = zfs_prop_get_int(zhp, ZFS_PROP_VERSION); 1045 if (intval < version) { 1046 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1047 "Can not downgrade; already at version %u"), 1048 version); 1049 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1050 goto error; 1051 } 1052 break; 1053 } 1054 1055 case ZFS_PROP_VOLBLOCKSIZE: 1056 case ZFS_PROP_RECORDSIZE: 1057 { 1058 int maxbs = SPA_MAXBLOCKSIZE; 1059 if (zpool_hdl != NULL) { 1060 maxbs = zpool_get_prop_int(zpool_hdl, 1061 ZPOOL_PROP_MAXBLOCKSIZE, NULL); 1062 } 1063 /* 1064 * Volumes are limited to a volblocksize of 128KB, 1065 * because they typically service workloads with 1066 * small random writes, which incur a large performance 1067 * penalty with large blocks. 1068 */ 1069 if (prop == ZFS_PROP_VOLBLOCKSIZE) 1070 maxbs = SPA_OLD_MAXBLOCKSIZE; 1071 /* 1072 * The value must be a power of two between 1073 * SPA_MINBLOCKSIZE and maxbs. 1074 */ 1075 if (intval < SPA_MINBLOCKSIZE || 1076 intval > maxbs || !ISP2(intval)) { 1077 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1078 "'%s' must be power of 2 from 512B " 1079 "to %uKB"), propname, maxbs >> 10); 1080 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1081 goto error; 1082 } 1083 break; 1084 } 1085 case ZFS_PROP_MLSLABEL: 1086 { 1087#ifdef illumos 1088 /* 1089 * Verify the mlslabel string and convert to 1090 * internal hex label string. 1091 */ 1092 1093 m_label_t *new_sl; 1094 char *hex = NULL; /* internal label string */ 1095 1096 /* Default value is already OK. */ 1097 if (strcasecmp(strval, ZFS_MLSLABEL_DEFAULT) == 0) 1098 break; 1099 1100 /* Verify the label can be converted to binary form */ 1101 if (((new_sl = m_label_alloc(MAC_LABEL)) == NULL) || 1102 (str_to_label(strval, &new_sl, MAC_LABEL, 1103 L_NO_CORRECTION, NULL) == -1)) { 1104 goto badlabel; 1105 } 1106 1107 /* Now translate to hex internal label string */ 1108 if (label_to_str(new_sl, &hex, M_INTERNAL, 1109 DEF_NAMES) != 0) { 1110 if (hex) 1111 free(hex); 1112 goto badlabel; 1113 } 1114 m_label_free(new_sl); 1115 1116 /* If string is already in internal form, we're done. */ 1117 if (strcmp(strval, hex) == 0) { 1118 free(hex); 1119 break; 1120 } 1121 1122 /* Replace the label string with the internal form. */ 1123 (void) nvlist_remove(ret, zfs_prop_to_name(prop), 1124 DATA_TYPE_STRING); 1125 verify(nvlist_add_string(ret, zfs_prop_to_name(prop), 1126 hex) == 0); 1127 free(hex); 1128 1129 break; 1130 1131badlabel: 1132 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1133 "invalid mlslabel '%s'"), strval); 1134 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1135 m_label_free(new_sl); /* OK if null */ 1136#else /* !illumos */ 1137 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1138 "mlslabel is not supported on FreeBSD")); 1139 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1140#endif /* illumos */ 1141 goto error; 1142 1143 } 1144 1145 case ZFS_PROP_MOUNTPOINT: 1146 { 1147 namecheck_err_t why; 1148 1149 if (strcmp(strval, ZFS_MOUNTPOINT_NONE) == 0 || 1150 strcmp(strval, ZFS_MOUNTPOINT_LEGACY) == 0) 1151 break; 1152 1153 if (mountpoint_namecheck(strval, &why)) { 1154 switch (why) { 1155 case NAME_ERR_LEADING_SLASH: 1156 zfs_error_aux(hdl, 1157 dgettext(TEXT_DOMAIN, 1158 "'%s' must be an absolute path, " 1159 "'none', or 'legacy'"), propname); 1160 break; 1161 case NAME_ERR_TOOLONG: 1162 zfs_error_aux(hdl, 1163 dgettext(TEXT_DOMAIN, 1164 "component of '%s' is too long"), 1165 propname); 1166 break; 1167 1168 default: 1169 zfs_error_aux(hdl, 1170 dgettext(TEXT_DOMAIN, 1171 "(%d) not defined"), 1172 why); 1173 break; 1174 } 1175 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1176 goto error; 1177 } 1178 } 1179 1180 /*FALLTHRU*/ 1181 1182 case ZFS_PROP_SHARESMB: 1183 case ZFS_PROP_SHARENFS: 1184 /* 1185 * For the mountpoint and sharenfs or sharesmb 1186 * properties, check if it can be set in a 1187 * global/non-global zone based on 1188 * the zoned property value: 1189 * 1190 * global zone non-global zone 1191 * -------------------------------------------------- 1192 * zoned=on mountpoint (no) mountpoint (yes) 1193 * sharenfs (no) sharenfs (no) 1194 * sharesmb (no) sharesmb (no) 1195 * 1196 * zoned=off mountpoint (yes) N/A 1197 * sharenfs (yes) 1198 * sharesmb (yes) 1199 */ 1200 if (zoned) { 1201 if (getzoneid() == GLOBAL_ZONEID) { 1202 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1203 "'%s' cannot be set on " 1204 "dataset in a non-global zone"), 1205 propname); 1206 (void) zfs_error(hdl, EZFS_ZONED, 1207 errbuf); 1208 goto error; 1209 } else if (prop == ZFS_PROP_SHARENFS || 1210 prop == ZFS_PROP_SHARESMB) { 1211 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1212 "'%s' cannot be set in " 1213 "a non-global zone"), propname); 1214 (void) zfs_error(hdl, EZFS_ZONED, 1215 errbuf); 1216 goto error; 1217 } 1218 } else if (getzoneid() != GLOBAL_ZONEID) { 1219 /* 1220 * If zoned property is 'off', this must be in 1221 * a global zone. If not, something is wrong. 1222 */ 1223 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1224 "'%s' cannot be set while dataset " 1225 "'zoned' property is set"), propname); 1226 (void) zfs_error(hdl, EZFS_ZONED, errbuf); 1227 goto error; 1228 } 1229 1230 /* 1231 * At this point, it is legitimate to set the 1232 * property. Now we want to make sure that the 1233 * property value is valid if it is sharenfs. 1234 */ 1235 if ((prop == ZFS_PROP_SHARENFS || 1236 prop == ZFS_PROP_SHARESMB) && 1237 strcmp(strval, "on") != 0 && 1238 strcmp(strval, "off") != 0) { 1239 zfs_share_proto_t proto; 1240 1241 if (prop == ZFS_PROP_SHARESMB) 1242 proto = PROTO_SMB; 1243 else 1244 proto = PROTO_NFS; 1245 1246 /* 1247 * Must be an valid sharing protocol 1248 * option string so init the libshare 1249 * in order to enable the parser and 1250 * then parse the options. We use the 1251 * control API since we don't care about 1252 * the current configuration and don't 1253 * want the overhead of loading it 1254 * until we actually do something. 1255 */ 1256 1257 if (zfs_init_libshare(hdl, 1258 SA_INIT_CONTROL_API) != SA_OK) { 1259 /* 1260 * An error occurred so we can't do 1261 * anything 1262 */ 1263 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1264 "'%s' cannot be set: problem " 1265 "in share initialization"), 1266 propname); 1267 (void) zfs_error(hdl, EZFS_BADPROP, 1268 errbuf); 1269 goto error; 1270 } 1271 1272 if (zfs_parse_options(strval, proto) != SA_OK) { 1273 /* 1274 * There was an error in parsing so 1275 * deal with it by issuing an error 1276 * message and leaving after 1277 * uninitializing the the libshare 1278 * interface. 1279 */ 1280 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1281 "'%s' cannot be set to invalid " 1282 "options"), propname); 1283 (void) zfs_error(hdl, EZFS_BADPROP, 1284 errbuf); 1285 zfs_uninit_libshare(hdl); 1286 goto error; 1287 } 1288 zfs_uninit_libshare(hdl); 1289 } 1290 1291 break; 1292 1293 case ZFS_PROP_UTF8ONLY: 1294 chosen_utf = (int)intval; 1295 break; 1296 1297 case ZFS_PROP_NORMALIZE: 1298 chosen_normal = (int)intval; 1299 break; 1300 1301 default: 1302 break; 1303 } 1304 1305 /* 1306 * For changes to existing volumes, we have some additional 1307 * checks to enforce. 1308 */ 1309 if (type == ZFS_TYPE_VOLUME && zhp != NULL) { 1310 uint64_t volsize = zfs_prop_get_int(zhp, 1311 ZFS_PROP_VOLSIZE); 1312 uint64_t blocksize = zfs_prop_get_int(zhp, 1313 ZFS_PROP_VOLBLOCKSIZE); 1314 char buf[64]; 1315 1316 switch (prop) { 1317 case ZFS_PROP_RESERVATION: 1318 case ZFS_PROP_REFRESERVATION: 1319 if (intval > volsize) { 1320 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1321 "'%s' is greater than current " 1322 "volume size"), propname); 1323 (void) zfs_error(hdl, EZFS_BADPROP, 1324 errbuf); 1325 goto error; 1326 } 1327 break; 1328 1329 case ZFS_PROP_VOLSIZE: 1330 if (intval % blocksize != 0) { 1331 zfs_nicenum(blocksize, buf, 1332 sizeof (buf)); 1333 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1334 "'%s' must be a multiple of " 1335 "volume block size (%s)"), 1336 propname, buf); 1337 (void) zfs_error(hdl, EZFS_BADPROP, 1338 errbuf); 1339 goto error; 1340 } 1341 1342 if (intval == 0) { 1343 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1344 "'%s' cannot be zero"), 1345 propname); 1346 (void) zfs_error(hdl, EZFS_BADPROP, 1347 errbuf); 1348 goto error; 1349 } 1350 break; 1351 1352 default: 1353 break; 1354 } 1355 } 1356 } 1357 1358 /* 1359 * If normalization was chosen, but no UTF8 choice was made, 1360 * enforce rejection of non-UTF8 names. 1361 * 1362 * If normalization was chosen, but rejecting non-UTF8 names 1363 * was explicitly not chosen, it is an error. 1364 */ 1365 if (chosen_normal > 0 && chosen_utf < 0) { 1366 if (nvlist_add_uint64(ret, 1367 zfs_prop_to_name(ZFS_PROP_UTF8ONLY), 1) != 0) { 1368 (void) no_memory(hdl); 1369 goto error; 1370 } 1371 } else if (chosen_normal > 0 && chosen_utf == 0) { 1372 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1373 "'%s' must be set 'on' if normalization chosen"), 1374 zfs_prop_to_name(ZFS_PROP_UTF8ONLY)); 1375 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1376 goto error; 1377 } 1378 return (ret); 1379 1380error: 1381 nvlist_free(ret); 1382 return (NULL); 1383} 1384 1385int 1386zfs_add_synthetic_resv(zfs_handle_t *zhp, nvlist_t *nvl) 1387{ 1388 uint64_t old_volsize; 1389 uint64_t new_volsize; 1390 uint64_t old_reservation; 1391 uint64_t new_reservation; 1392 zfs_prop_t resv_prop; 1393 nvlist_t *props; 1394 1395 /* 1396 * If this is an existing volume, and someone is setting the volsize, 1397 * make sure that it matches the reservation, or add it if necessary. 1398 */ 1399 old_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE); 1400 if (zfs_which_resv_prop(zhp, &resv_prop) < 0) 1401 return (-1); 1402 old_reservation = zfs_prop_get_int(zhp, resv_prop); 1403 1404 props = fnvlist_alloc(); 1405 fnvlist_add_uint64(props, zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE), 1406 zfs_prop_get_int(zhp, ZFS_PROP_VOLBLOCKSIZE)); 1407 1408 if ((zvol_volsize_to_reservation(old_volsize, props) != 1409 old_reservation) || nvlist_exists(nvl, 1410 zfs_prop_to_name(resv_prop))) { 1411 fnvlist_free(props); 1412 return (0); 1413 } 1414 if (nvlist_lookup_uint64(nvl, zfs_prop_to_name(ZFS_PROP_VOLSIZE), 1415 &new_volsize) != 0) { 1416 fnvlist_free(props); 1417 return (-1); 1418 } 1419 new_reservation = zvol_volsize_to_reservation(new_volsize, props); 1420 fnvlist_free(props); 1421 1422 if (nvlist_add_uint64(nvl, zfs_prop_to_name(resv_prop), 1423 new_reservation) != 0) { 1424 (void) no_memory(zhp->zfs_hdl); 1425 return (-1); 1426 } 1427 return (1); 1428} 1429 1430void 1431zfs_setprop_error(libzfs_handle_t *hdl, zfs_prop_t prop, int err, 1432 char *errbuf) 1433{ 1434 switch (err) { 1435 1436 case ENOSPC: 1437 /* 1438 * For quotas and reservations, ENOSPC indicates 1439 * something different; setting a quota or reservation 1440 * doesn't use any disk space. 1441 */ 1442 switch (prop) { 1443 case ZFS_PROP_QUOTA: 1444 case ZFS_PROP_REFQUOTA: 1445 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1446 "size is less than current used or " 1447 "reserved space")); 1448 (void) zfs_error(hdl, EZFS_PROPSPACE, errbuf); 1449 break; 1450 1451 case ZFS_PROP_RESERVATION: 1452 case ZFS_PROP_REFRESERVATION: 1453 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1454 "size is greater than available space")); 1455 (void) zfs_error(hdl, EZFS_PROPSPACE, errbuf); 1456 break; 1457 1458 default: 1459 (void) zfs_standard_error(hdl, err, errbuf); 1460 break; 1461 } 1462 break; 1463 1464 case EBUSY: 1465 (void) zfs_standard_error(hdl, EBUSY, errbuf); 1466 break; 1467 1468 case EROFS: 1469 (void) zfs_error(hdl, EZFS_DSREADONLY, errbuf); 1470 break; 1471 1472 case ENOTSUP: 1473 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1474 "pool and or dataset must be upgraded to set this " 1475 "property or value")); 1476 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf); 1477 break; 1478 1479 case ERANGE: 1480 case EDOM: 1481 if (prop == ZFS_PROP_COMPRESSION || 1482 prop == ZFS_PROP_RECORDSIZE) { 1483 (void) zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1484 "property setting is not allowed on " 1485 "bootable datasets")); 1486 (void) zfs_error(hdl, EZFS_NOTSUP, errbuf); 1487 } else if (prop == ZFS_PROP_CHECKSUM || 1488 prop == ZFS_PROP_DEDUP) { 1489 (void) zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1490 "property setting is not allowed on " 1491 "root pools")); 1492 (void) zfs_error(hdl, EZFS_NOTSUP, errbuf); 1493 } else { 1494 (void) zfs_standard_error(hdl, err, errbuf); 1495 } 1496 break; 1497 1498 case EINVAL: 1499 if (prop == ZPROP_INVAL) { 1500 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1501 } else { 1502 (void) zfs_standard_error(hdl, err, errbuf); 1503 } 1504 break; 1505 1506 case EOVERFLOW: 1507 /* 1508 * This platform can't address a volume this big. 1509 */ 1510#ifdef _ILP32 1511 if (prop == ZFS_PROP_VOLSIZE) { 1512 (void) zfs_error(hdl, EZFS_VOLTOOBIG, errbuf); 1513 break; 1514 } 1515#endif 1516 /* FALLTHROUGH */ 1517 default: 1518 (void) zfs_standard_error(hdl, err, errbuf); 1519 } 1520} 1521 1522/* 1523 * Given a property name and value, set the property for the given dataset. 1524 */ 1525int 1526zfs_prop_set(zfs_handle_t *zhp, const char *propname, const char *propval) 1527{ 1528 int ret = -1; 1529 char errbuf[1024]; 1530 libzfs_handle_t *hdl = zhp->zfs_hdl; 1531 nvlist_t *nvl = NULL; 1532 1533 (void) snprintf(errbuf, sizeof (errbuf), 1534 dgettext(TEXT_DOMAIN, "cannot set property for '%s'"), 1535 zhp->zfs_name); 1536 1537 if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0 || 1538 nvlist_add_string(nvl, propname, propval) != 0) { 1539 (void) no_memory(hdl); 1540 goto error; 1541 } 1542 1543 ret = zfs_prop_set_list(zhp, nvl); 1544 1545error: 1546 nvlist_free(nvl); 1547 return (ret); 1548} 1549 1550 1551 1552/* 1553 * Given an nvlist of property names and values, set the properties for the 1554 * given dataset. 1555 */ 1556int 1557zfs_prop_set_list(zfs_handle_t *zhp, nvlist_t *props) 1558{ 1559 zfs_cmd_t zc = { 0 }; 1560 int ret = -1; 1561 prop_changelist_t **cls = NULL; 1562 int cl_idx; 1563 char errbuf[1024]; 1564 libzfs_handle_t *hdl = zhp->zfs_hdl; 1565 nvlist_t *nvl; 1566 int nvl_len; 1567 int added_resv = 0; 1568 1569 (void) snprintf(errbuf, sizeof (errbuf), 1570 dgettext(TEXT_DOMAIN, "cannot set property for '%s'"), 1571 zhp->zfs_name); 1572 1573 if ((nvl = zfs_valid_proplist(hdl, zhp->zfs_type, props, 1574 zfs_prop_get_int(zhp, ZFS_PROP_ZONED), zhp, zhp->zpool_hdl, 1575 errbuf)) == NULL) 1576 goto error; 1577 1578 /* 1579 * We have to check for any extra properties which need to be added 1580 * before computing the length of the nvlist. 1581 */ 1582 for (nvpair_t *elem = nvlist_next_nvpair(nvl, NULL); 1583 elem != NULL; 1584 elem = nvlist_next_nvpair(nvl, elem)) { 1585 if (zfs_name_to_prop(nvpair_name(elem)) == ZFS_PROP_VOLSIZE && 1586 (added_resv = zfs_add_synthetic_resv(zhp, nvl)) == -1) { 1587 goto error; 1588 } 1589 } 1590 /* 1591 * Check how many properties we're setting and allocate an array to 1592 * store changelist pointers for postfix(). 1593 */ 1594 nvl_len = 0; 1595 for (nvpair_t *elem = nvlist_next_nvpair(nvl, NULL); 1596 elem != NULL; 1597 elem = nvlist_next_nvpair(nvl, elem)) 1598 nvl_len++; 1599 if ((cls = calloc(nvl_len, sizeof (prop_changelist_t *))) == NULL) 1600 goto error; 1601 1602 cl_idx = 0; 1603 for (nvpair_t *elem = nvlist_next_nvpair(nvl, NULL); 1604 elem != NULL; 1605 elem = nvlist_next_nvpair(nvl, elem)) { 1606 1607 zfs_prop_t prop = zfs_name_to_prop(nvpair_name(elem)); 1608 1609 assert(cl_idx < nvl_len); 1610 /* 1611 * We don't want to unmount & remount the dataset when changing 1612 * its canmount property to 'on' or 'noauto'. We only use 1613 * the changelist logic to unmount when setting canmount=off. 1614 */ 1615 if (prop != ZFS_PROP_CANMOUNT || 1616 (fnvpair_value_uint64(elem) == ZFS_CANMOUNT_OFF && 1617 zfs_is_mounted(zhp, NULL))) { 1618 cls[cl_idx] = changelist_gather(zhp, prop, 0, 0); 1619 if (cls[cl_idx] == NULL) 1620 goto error; 1621 } 1622 1623 if (prop == ZFS_PROP_MOUNTPOINT && 1624 changelist_haszonedchild(cls[cl_idx])) { 1625 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1626 "child dataset with inherited mountpoint is used " 1627 "in a non-global zone")); 1628 ret = zfs_error(hdl, EZFS_ZONED, errbuf); 1629 goto error; 1630 } 1631 1632 /* We don't support those properties on FreeBSD. */ 1633 switch (prop) { 1634 case ZFS_PROP_DEVICES: 1635 case ZFS_PROP_ISCSIOPTIONS: 1636 case ZFS_PROP_XATTR: 1637 case ZFS_PROP_VSCAN: 1638 case ZFS_PROP_NBMAND: 1639 case ZFS_PROP_MLSLABEL: 1640 (void) snprintf(errbuf, sizeof (errbuf), 1641 "property '%s' not supported on FreeBSD", 1642 nvpair_name(elem)); 1643 ret = zfs_error(hdl, EZFS_PERM, errbuf); 1644 goto error; 1645 } 1646 1647 if (cls[cl_idx] != NULL && 1648 (ret = changelist_prefix(cls[cl_idx])) != 0) 1649 goto error; 1650 1651 cl_idx++; 1652 } 1653 assert(cl_idx == nvl_len); 1654 1655 /* 1656 * Execute the corresponding ioctl() to set this list of properties. 1657 */ 1658 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 1659 1660 if ((ret = zcmd_write_src_nvlist(hdl, &zc, nvl)) != 0 || 1661 (ret = zcmd_alloc_dst_nvlist(hdl, &zc, 0)) != 0) 1662 goto error; 1663 1664 ret = zfs_ioctl(hdl, ZFS_IOC_SET_PROP, &zc); 1665 1666 if (ret != 0) { 1667 /* Get the list of unset properties back and report them. */ 1668 nvlist_t *errorprops = NULL; 1669 if (zcmd_read_dst_nvlist(hdl, &zc, &errorprops) != 0) 1670 goto error; 1671 for (nvpair_t *elem = nvlist_next_nvpair(nvl, NULL); 1672 elem != NULL; 1673 elem = nvlist_next_nvpair(nvl, elem)) { 1674 zfs_prop_t prop = zfs_name_to_prop(nvpair_name(elem)); 1675 zfs_setprop_error(hdl, prop, errno, errbuf); 1676 } 1677 nvlist_free(errorprops); 1678 1679 if (added_resv && errno == ENOSPC) { 1680 /* clean up the volsize property we tried to set */ 1681 uint64_t old_volsize = zfs_prop_get_int(zhp, 1682 ZFS_PROP_VOLSIZE); 1683 nvlist_free(nvl); 1684 nvl = NULL; 1685 zcmd_free_nvlists(&zc); 1686 1687 if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0) 1688 goto error; 1689 if (nvlist_add_uint64(nvl, 1690 zfs_prop_to_name(ZFS_PROP_VOLSIZE), 1691 old_volsize) != 0) 1692 goto error; 1693 if (zcmd_write_src_nvlist(hdl, &zc, nvl) != 0) 1694 goto error; 1695 (void) zfs_ioctl(hdl, ZFS_IOC_SET_PROP, &zc); 1696 } 1697 } else { 1698 for (cl_idx = 0; cl_idx < nvl_len; cl_idx++) { 1699 if (cls[cl_idx] != NULL) { 1700 int clp_err = changelist_postfix(cls[cl_idx]); 1701 if (clp_err != 0) 1702 ret = clp_err; 1703 } 1704 } 1705 1706 /* 1707 * Refresh the statistics so the new property value 1708 * is reflected. 1709 */ 1710 if (ret == 0) 1711 (void) get_stats(zhp); 1712 } 1713 1714error: 1715 nvlist_free(nvl); 1716 zcmd_free_nvlists(&zc); 1717 if (cls != NULL) { 1718 for (cl_idx = 0; cl_idx < nvl_len; cl_idx++) { 1719 if (cls[cl_idx] != NULL) 1720 changelist_free(cls[cl_idx]); 1721 } 1722 free(cls); 1723 } 1724 return (ret); 1725} 1726 1727/* 1728 * Given a property, inherit the value from the parent dataset, or if received 1729 * is TRUE, revert to the received value, if any. 1730 */ 1731int 1732zfs_prop_inherit(zfs_handle_t *zhp, const char *propname, boolean_t received) 1733{ 1734 zfs_cmd_t zc = { 0 }; 1735 int ret; 1736 prop_changelist_t *cl; 1737 libzfs_handle_t *hdl = zhp->zfs_hdl; 1738 char errbuf[1024]; 1739 zfs_prop_t prop; 1740 1741 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 1742 "cannot inherit %s for '%s'"), propname, zhp->zfs_name); 1743 1744 zc.zc_cookie = received; 1745 if ((prop = zfs_name_to_prop(propname)) == ZPROP_INVAL) { 1746 /* 1747 * For user properties, the amount of work we have to do is very 1748 * small, so just do it here. 1749 */ 1750 if (!zfs_prop_user(propname)) { 1751 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1752 "invalid property")); 1753 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 1754 } 1755 1756 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 1757 (void) strlcpy(zc.zc_value, propname, sizeof (zc.zc_value)); 1758 1759 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_INHERIT_PROP, &zc) != 0) 1760 return (zfs_standard_error(hdl, errno, errbuf)); 1761 1762 return (0); 1763 } 1764 1765 /* 1766 * Verify that this property is inheritable. 1767 */ 1768 if (zfs_prop_readonly(prop)) 1769 return (zfs_error(hdl, EZFS_PROPREADONLY, errbuf)); 1770 1771 if (!zfs_prop_inheritable(prop) && !received) 1772 return (zfs_error(hdl, EZFS_PROPNONINHERIT, errbuf)); 1773 1774 /* 1775 * Check to see if the value applies to this type 1776 */ 1777 if (!zfs_prop_valid_for_type(prop, zhp->zfs_type)) 1778 return (zfs_error(hdl, EZFS_PROPTYPE, errbuf)); 1779 1780 /* 1781 * Normalize the name, to get rid of shorthand abbreviations. 1782 */ 1783 propname = zfs_prop_to_name(prop); 1784 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 1785 (void) strlcpy(zc.zc_value, propname, sizeof (zc.zc_value)); 1786 1787 if (prop == ZFS_PROP_MOUNTPOINT && getzoneid() == GLOBAL_ZONEID && 1788 zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) { 1789 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1790 "dataset is used in a non-global zone")); 1791 return (zfs_error(hdl, EZFS_ZONED, errbuf)); 1792 } 1793 1794 /* 1795 * Determine datasets which will be affected by this change, if any. 1796 */ 1797 if ((cl = changelist_gather(zhp, prop, 0, 0)) == NULL) 1798 return (-1); 1799 1800 if (prop == ZFS_PROP_MOUNTPOINT && changelist_haszonedchild(cl)) { 1801 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1802 "child dataset with inherited mountpoint is used " 1803 "in a non-global zone")); 1804 ret = zfs_error(hdl, EZFS_ZONED, errbuf); 1805 goto error; 1806 } 1807 1808 if ((ret = changelist_prefix(cl)) != 0) 1809 goto error; 1810 1811 if ((ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_INHERIT_PROP, &zc)) != 0) { 1812 return (zfs_standard_error(hdl, errno, errbuf)); 1813 } else { 1814 1815 if ((ret = changelist_postfix(cl)) != 0) 1816 goto error; 1817 1818 /* 1819 * Refresh the statistics so the new property is reflected. 1820 */ 1821 (void) get_stats(zhp); 1822 } 1823 1824error: 1825 changelist_free(cl); 1826 return (ret); 1827} 1828 1829/* 1830 * True DSL properties are stored in an nvlist. The following two functions 1831 * extract them appropriately. 1832 */ 1833static uint64_t 1834getprop_uint64(zfs_handle_t *zhp, zfs_prop_t prop, char **source) 1835{ 1836 nvlist_t *nv; 1837 uint64_t value; 1838 1839 *source = NULL; 1840 if (nvlist_lookup_nvlist(zhp->zfs_props, 1841 zfs_prop_to_name(prop), &nv) == 0) { 1842 verify(nvlist_lookup_uint64(nv, ZPROP_VALUE, &value) == 0); 1843 (void) nvlist_lookup_string(nv, ZPROP_SOURCE, source); 1844 } else { 1845 verify(!zhp->zfs_props_table || 1846 zhp->zfs_props_table[prop] == B_TRUE); 1847 value = zfs_prop_default_numeric(prop); 1848 *source = ""; 1849 } 1850 1851 return (value); 1852} 1853 1854static const char * 1855getprop_string(zfs_handle_t *zhp, zfs_prop_t prop, char **source) 1856{ 1857 nvlist_t *nv; 1858 const char *value; 1859 1860 *source = NULL; 1861 if (nvlist_lookup_nvlist(zhp->zfs_props, 1862 zfs_prop_to_name(prop), &nv) == 0) { 1863 value = fnvlist_lookup_string(nv, ZPROP_VALUE); 1864 (void) nvlist_lookup_string(nv, ZPROP_SOURCE, source); 1865 } else { 1866 verify(!zhp->zfs_props_table || 1867 zhp->zfs_props_table[prop] == B_TRUE); 1868 value = zfs_prop_default_string(prop); 1869 *source = ""; 1870 } 1871 1872 return (value); 1873} 1874 1875static boolean_t 1876zfs_is_recvd_props_mode(zfs_handle_t *zhp) 1877{ 1878 return (zhp->zfs_props == zhp->zfs_recvd_props); 1879} 1880 1881static void 1882zfs_set_recvd_props_mode(zfs_handle_t *zhp, uint64_t *cookie) 1883{ 1884 *cookie = (uint64_t)(uintptr_t)zhp->zfs_props; 1885 zhp->zfs_props = zhp->zfs_recvd_props; 1886} 1887 1888static void 1889zfs_unset_recvd_props_mode(zfs_handle_t *zhp, uint64_t *cookie) 1890{ 1891 zhp->zfs_props = (nvlist_t *)(uintptr_t)*cookie; 1892 *cookie = 0; 1893} 1894 1895/* 1896 * Internal function for getting a numeric property. Both zfs_prop_get() and 1897 * zfs_prop_get_int() are built using this interface. 1898 * 1899 * Certain properties can be overridden using 'mount -o'. In this case, scan 1900 * the contents of the /etc/mnttab entry, searching for the appropriate options. 1901 * If they differ from the on-disk values, report the current values and mark 1902 * the source "temporary". 1903 */ 1904static int 1905get_numeric_property(zfs_handle_t *zhp, zfs_prop_t prop, zprop_source_t *src, 1906 char **source, uint64_t *val) 1907{ 1908 zfs_cmd_t zc = { 0 }; 1909 nvlist_t *zplprops = NULL; 1910 struct mnttab mnt; 1911 char *mntopt_on = NULL; 1912 char *mntopt_off = NULL; 1913 boolean_t received = zfs_is_recvd_props_mode(zhp); 1914 1915 *source = NULL; 1916 1917 switch (prop) { 1918 case ZFS_PROP_ATIME: 1919 mntopt_on = MNTOPT_ATIME; 1920 mntopt_off = MNTOPT_NOATIME; 1921 break; 1922 1923 case ZFS_PROP_DEVICES: 1924 mntopt_on = MNTOPT_DEVICES; 1925 mntopt_off = MNTOPT_NODEVICES; 1926 break; 1927 1928 case ZFS_PROP_EXEC: 1929 mntopt_on = MNTOPT_EXEC; 1930 mntopt_off = MNTOPT_NOEXEC; 1931 break; 1932 1933 case ZFS_PROP_READONLY: 1934 mntopt_on = MNTOPT_RO; 1935 mntopt_off = MNTOPT_RW; 1936 break; 1937 1938 case ZFS_PROP_SETUID: 1939 mntopt_on = MNTOPT_SETUID; 1940 mntopt_off = MNTOPT_NOSETUID; 1941 break; 1942 1943 case ZFS_PROP_XATTR: 1944 mntopt_on = MNTOPT_XATTR; 1945 mntopt_off = MNTOPT_NOXATTR; 1946 break; 1947 1948 case ZFS_PROP_NBMAND: 1949 mntopt_on = MNTOPT_NBMAND; 1950 mntopt_off = MNTOPT_NONBMAND; 1951 break; 1952 1953 default: 1954 break; 1955 } 1956 1957 /* 1958 * Because looking up the mount options is potentially expensive 1959 * (iterating over all of /etc/mnttab), we defer its calculation until 1960 * we're looking up a property which requires its presence. 1961 */ 1962 if (!zhp->zfs_mntcheck && 1963 (mntopt_on != NULL || prop == ZFS_PROP_MOUNTED)) { 1964 libzfs_handle_t *hdl = zhp->zfs_hdl; 1965 struct mnttab entry; 1966 1967 if (libzfs_mnttab_find(hdl, zhp->zfs_name, &entry) == 0) { 1968 zhp->zfs_mntopts = zfs_strdup(hdl, 1969 entry.mnt_mntopts); 1970 if (zhp->zfs_mntopts == NULL) 1971 return (-1); 1972 } 1973 1974 zhp->zfs_mntcheck = B_TRUE; 1975 } 1976 1977 if (zhp->zfs_mntopts == NULL) 1978 mnt.mnt_mntopts = ""; 1979 else 1980 mnt.mnt_mntopts = zhp->zfs_mntopts; 1981 1982 switch (prop) { 1983 case ZFS_PROP_ATIME: 1984 case ZFS_PROP_DEVICES: 1985 case ZFS_PROP_EXEC: 1986 case ZFS_PROP_READONLY: 1987 case ZFS_PROP_SETUID: 1988 case ZFS_PROP_XATTR: 1989 case ZFS_PROP_NBMAND: 1990 *val = getprop_uint64(zhp, prop, source); 1991 1992 if (received) 1993 break; 1994 1995 if (hasmntopt(&mnt, mntopt_on) && !*val) { 1996 *val = B_TRUE; 1997 if (src) 1998 *src = ZPROP_SRC_TEMPORARY; 1999 } else if (hasmntopt(&mnt, mntopt_off) && *val) { 2000 *val = B_FALSE; 2001 if (src) 2002 *src = ZPROP_SRC_TEMPORARY; 2003 } 2004 break; 2005 2006 case ZFS_PROP_CANMOUNT: 2007 case ZFS_PROP_VOLSIZE: 2008 case ZFS_PROP_QUOTA: 2009 case ZFS_PROP_REFQUOTA: 2010 case ZFS_PROP_RESERVATION: 2011 case ZFS_PROP_REFRESERVATION: 2012 case ZFS_PROP_FILESYSTEM_LIMIT: 2013 case ZFS_PROP_SNAPSHOT_LIMIT: 2014 case ZFS_PROP_FILESYSTEM_COUNT: 2015 case ZFS_PROP_SNAPSHOT_COUNT: 2016 *val = getprop_uint64(zhp, prop, source); 2017 2018 if (*source == NULL) { 2019 /* not default, must be local */ 2020 *source = zhp->zfs_name; 2021 } 2022 break; 2023 2024 case ZFS_PROP_MOUNTED: 2025 *val = (zhp->zfs_mntopts != NULL); 2026 break; 2027 2028 case ZFS_PROP_NUMCLONES: 2029 *val = zhp->zfs_dmustats.dds_num_clones; 2030 break; 2031 2032 case ZFS_PROP_VERSION: 2033 case ZFS_PROP_NORMALIZE: 2034 case ZFS_PROP_UTF8ONLY: 2035 case ZFS_PROP_CASE: 2036 if (!zfs_prop_valid_for_type(prop, zhp->zfs_head_type) || 2037 zcmd_alloc_dst_nvlist(zhp->zfs_hdl, &zc, 0) != 0) 2038 return (-1); 2039 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 2040 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_OBJSET_ZPLPROPS, &zc)) { 2041 zcmd_free_nvlists(&zc); 2042 return (-1); 2043 } 2044 if (zcmd_read_dst_nvlist(zhp->zfs_hdl, &zc, &zplprops) != 0 || 2045 nvlist_lookup_uint64(zplprops, zfs_prop_to_name(prop), 2046 val) != 0) { 2047 zcmd_free_nvlists(&zc); 2048 return (-1); 2049 } 2050 nvlist_free(zplprops); 2051 zcmd_free_nvlists(&zc); 2052 break; 2053 2054 case ZFS_PROP_INCONSISTENT: 2055 *val = zhp->zfs_dmustats.dds_inconsistent; 2056 break; 2057 2058 default: 2059 switch (zfs_prop_get_type(prop)) { 2060 case PROP_TYPE_NUMBER: 2061 case PROP_TYPE_INDEX: 2062 *val = getprop_uint64(zhp, prop, source); 2063 /* 2064 * If we tried to use a default value for a 2065 * readonly property, it means that it was not 2066 * present. 2067 */ 2068 if (zfs_prop_readonly(prop) && 2069 *source != NULL && (*source)[0] == '\0') { 2070 *source = NULL; 2071 } 2072 break; 2073 2074 case PROP_TYPE_STRING: 2075 default: 2076 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN, 2077 "cannot get non-numeric property")); 2078 return (zfs_error(zhp->zfs_hdl, EZFS_BADPROP, 2079 dgettext(TEXT_DOMAIN, "internal error"))); 2080 } 2081 } 2082 2083 return (0); 2084} 2085 2086/* 2087 * Calculate the source type, given the raw source string. 2088 */ 2089static void 2090get_source(zfs_handle_t *zhp, zprop_source_t *srctype, char *source, 2091 char *statbuf, size_t statlen) 2092{ 2093 if (statbuf == NULL || *srctype == ZPROP_SRC_TEMPORARY) 2094 return; 2095 2096 if (source == NULL) { 2097 *srctype = ZPROP_SRC_NONE; 2098 } else if (source[0] == '\0') { 2099 *srctype = ZPROP_SRC_DEFAULT; 2100 } else if (strstr(source, ZPROP_SOURCE_VAL_RECVD) != NULL) { 2101 *srctype = ZPROP_SRC_RECEIVED; 2102 } else { 2103 if (strcmp(source, zhp->zfs_name) == 0) { 2104 *srctype = ZPROP_SRC_LOCAL; 2105 } else { 2106 (void) strlcpy(statbuf, source, statlen); 2107 *srctype = ZPROP_SRC_INHERITED; 2108 } 2109 } 2110 2111} 2112 2113int 2114zfs_prop_get_recvd(zfs_handle_t *zhp, const char *propname, char *propbuf, 2115 size_t proplen, boolean_t literal) 2116{ 2117 zfs_prop_t prop; 2118 int err = 0; 2119 2120 if (zhp->zfs_recvd_props == NULL) 2121 if (get_recvd_props_ioctl(zhp) != 0) 2122 return (-1); 2123 2124 prop = zfs_name_to_prop(propname); 2125 2126 if (prop != ZPROP_INVAL) { 2127 uint64_t cookie; 2128 if (!nvlist_exists(zhp->zfs_recvd_props, propname)) 2129 return (-1); 2130 zfs_set_recvd_props_mode(zhp, &cookie); 2131 err = zfs_prop_get(zhp, prop, propbuf, proplen, 2132 NULL, NULL, 0, literal); 2133 zfs_unset_recvd_props_mode(zhp, &cookie); 2134 } else { 2135 nvlist_t *propval; 2136 char *recvdval; 2137 if (nvlist_lookup_nvlist(zhp->zfs_recvd_props, 2138 propname, &propval) != 0) 2139 return (-1); 2140 verify(nvlist_lookup_string(propval, ZPROP_VALUE, 2141 &recvdval) == 0); 2142 (void) strlcpy(propbuf, recvdval, proplen); 2143 } 2144 2145 return (err == 0 ? 0 : -1); 2146} 2147 2148static int 2149get_clones_string(zfs_handle_t *zhp, char *propbuf, size_t proplen) 2150{ 2151 nvlist_t *value; 2152 nvpair_t *pair; 2153 2154 value = zfs_get_clones_nvl(zhp); 2155 if (value == NULL) 2156 return (-1); 2157 2158 propbuf[0] = '\0'; 2159 for (pair = nvlist_next_nvpair(value, NULL); pair != NULL; 2160 pair = nvlist_next_nvpair(value, pair)) { 2161 if (propbuf[0] != '\0') 2162 (void) strlcat(propbuf, ",", proplen); 2163 (void) strlcat(propbuf, nvpair_name(pair), proplen); 2164 } 2165 2166 return (0); 2167} 2168 2169struct get_clones_arg { 2170 uint64_t numclones; 2171 nvlist_t *value; 2172 const char *origin; 2173 char buf[ZFS_MAX_DATASET_NAME_LEN]; 2174}; 2175 2176int 2177get_clones_cb(zfs_handle_t *zhp, void *arg) 2178{ 2179 struct get_clones_arg *gca = arg; 2180 2181 if (gca->numclones == 0) { 2182 zfs_close(zhp); 2183 return (0); 2184 } 2185 2186 if (zfs_prop_get(zhp, ZFS_PROP_ORIGIN, gca->buf, sizeof (gca->buf), 2187 NULL, NULL, 0, B_TRUE) != 0) 2188 goto out; 2189 if (strcmp(gca->buf, gca->origin) == 0) { 2190 fnvlist_add_boolean(gca->value, zfs_get_name(zhp)); 2191 gca->numclones--; 2192 } 2193 2194out: 2195 (void) zfs_iter_children(zhp, get_clones_cb, gca); 2196 zfs_close(zhp); 2197 return (0); 2198} 2199 2200nvlist_t * 2201zfs_get_clones_nvl(zfs_handle_t *zhp) 2202{ 2203 nvlist_t *nv, *value; 2204 2205 if (nvlist_lookup_nvlist(zhp->zfs_props, 2206 zfs_prop_to_name(ZFS_PROP_CLONES), &nv) != 0) { 2207 struct get_clones_arg gca; 2208 2209 /* 2210 * if this is a snapshot, then the kernel wasn't able 2211 * to get the clones. Do it by slowly iterating. 2212 */ 2213 if (zhp->zfs_type != ZFS_TYPE_SNAPSHOT) 2214 return (NULL); 2215 if (nvlist_alloc(&nv, NV_UNIQUE_NAME, 0) != 0) 2216 return (NULL); 2217 if (nvlist_alloc(&value, NV_UNIQUE_NAME, 0) != 0) { 2218 nvlist_free(nv); 2219 return (NULL); 2220 } 2221 2222 gca.numclones = zfs_prop_get_int(zhp, ZFS_PROP_NUMCLONES); 2223 gca.value = value; 2224 gca.origin = zhp->zfs_name; 2225 2226 if (gca.numclones != 0) { 2227 zfs_handle_t *root; 2228 char pool[ZFS_MAX_DATASET_NAME_LEN]; 2229 char *cp = pool; 2230 2231 /* get the pool name */ 2232 (void) strlcpy(pool, zhp->zfs_name, sizeof (pool)); 2233 (void) strsep(&cp, "/@"); 2234 root = zfs_open(zhp->zfs_hdl, pool, 2235 ZFS_TYPE_FILESYSTEM); 2236 2237 (void) get_clones_cb(root, &gca); 2238 } 2239 2240 if (gca.numclones != 0 || 2241 nvlist_add_nvlist(nv, ZPROP_VALUE, value) != 0 || 2242 nvlist_add_nvlist(zhp->zfs_props, 2243 zfs_prop_to_name(ZFS_PROP_CLONES), nv) != 0) { 2244 nvlist_free(nv); 2245 nvlist_free(value); 2246 return (NULL); 2247 } 2248 nvlist_free(nv); 2249 nvlist_free(value); 2250 verify(0 == nvlist_lookup_nvlist(zhp->zfs_props, 2251 zfs_prop_to_name(ZFS_PROP_CLONES), &nv)); 2252 } 2253 2254 verify(nvlist_lookup_nvlist(nv, ZPROP_VALUE, &value) == 0); 2255 2256 return (value); 2257} 2258 2259/* 2260 * Retrieve a property from the given object. If 'literal' is specified, then 2261 * numbers are left as exact values. Otherwise, numbers are converted to a 2262 * human-readable form. 2263 * 2264 * Returns 0 on success, or -1 on error. 2265 */ 2266int 2267zfs_prop_get(zfs_handle_t *zhp, zfs_prop_t prop, char *propbuf, size_t proplen, 2268 zprop_source_t *src, char *statbuf, size_t statlen, boolean_t literal) 2269{ 2270 char *source = NULL; 2271 uint64_t val; 2272 const char *str; 2273 const char *strval; 2274 boolean_t received = zfs_is_recvd_props_mode(zhp); 2275 2276 /* 2277 * Check to see if this property applies to our object 2278 */ 2279 if (!zfs_prop_valid_for_type(prop, zhp->zfs_type)) 2280 return (-1); 2281 2282 if (received && zfs_prop_readonly(prop)) 2283 return (-1); 2284 2285 if (src) 2286 *src = ZPROP_SRC_NONE; 2287 2288 switch (prop) { 2289 case ZFS_PROP_CREATION: 2290 /* 2291 * 'creation' is a time_t stored in the statistics. We convert 2292 * this into a string unless 'literal' is specified. 2293 */ 2294 { 2295 val = getprop_uint64(zhp, prop, &source); 2296 time_t time = (time_t)val; 2297 struct tm t; 2298 2299 if (literal || 2300 localtime_r(&time, &t) == NULL || 2301 strftime(propbuf, proplen, "%a %b %e %k:%M %Y", 2302 &t) == 0) 2303 (void) snprintf(propbuf, proplen, "%llu", val); 2304 } 2305 break; 2306 2307 case ZFS_PROP_MOUNTPOINT: 2308 /* 2309 * Getting the precise mountpoint can be tricky. 2310 * 2311 * - for 'none' or 'legacy', return those values. 2312 * - for inherited mountpoints, we want to take everything 2313 * after our ancestor and append it to the inherited value. 2314 * 2315 * If the pool has an alternate root, we want to prepend that 2316 * root to any values we return. 2317 */ 2318 2319 str = getprop_string(zhp, prop, &source); 2320 2321 if (str[0] == '/') { 2322 char buf[MAXPATHLEN]; 2323 char *root = buf; 2324 const char *relpath; 2325 2326 /* 2327 * If we inherit the mountpoint, even from a dataset 2328 * with a received value, the source will be the path of 2329 * the dataset we inherit from. If source is 2330 * ZPROP_SOURCE_VAL_RECVD, the received value is not 2331 * inherited. 2332 */ 2333 if (strcmp(source, ZPROP_SOURCE_VAL_RECVD) == 0) { 2334 relpath = ""; 2335 } else { 2336 relpath = zhp->zfs_name + strlen(source); 2337 if (relpath[0] == '/') 2338 relpath++; 2339 } 2340 2341 if ((zpool_get_prop(zhp->zpool_hdl, 2342 ZPOOL_PROP_ALTROOT, buf, MAXPATHLEN, NULL, 2343 B_FALSE)) || (strcmp(root, "-") == 0)) 2344 root[0] = '\0'; 2345 /* 2346 * Special case an alternate root of '/'. This will 2347 * avoid having multiple leading slashes in the 2348 * mountpoint path. 2349 */ 2350 if (strcmp(root, "/") == 0) 2351 root++; 2352 2353 /* 2354 * If the mountpoint is '/' then skip over this 2355 * if we are obtaining either an alternate root or 2356 * an inherited mountpoint. 2357 */ 2358 if (str[1] == '\0' && (root[0] != '\0' || 2359 relpath[0] != '\0')) 2360 str++; 2361 2362 if (relpath[0] == '\0') 2363 (void) snprintf(propbuf, proplen, "%s%s", 2364 root, str); 2365 else 2366 (void) snprintf(propbuf, proplen, "%s%s%s%s", 2367 root, str, relpath[0] == '@' ? "" : "/", 2368 relpath); 2369 } else { 2370 /* 'legacy' or 'none' */ 2371 (void) strlcpy(propbuf, str, proplen); 2372 } 2373 2374 break; 2375 2376 case ZFS_PROP_ORIGIN: 2377 str = getprop_string(zhp, prop, &source); 2378 if (str == NULL) 2379 return (-1); 2380 (void) strlcpy(propbuf, str, proplen); 2381 break; 2382 2383 case ZFS_PROP_CLONES: 2384 if (get_clones_string(zhp, propbuf, proplen) != 0) 2385 return (-1); 2386 break; 2387 2388 case ZFS_PROP_QUOTA: 2389 case ZFS_PROP_REFQUOTA: 2390 case ZFS_PROP_RESERVATION: 2391 case ZFS_PROP_REFRESERVATION: 2392 2393 if (get_numeric_property(zhp, prop, src, &source, &val) != 0) 2394 return (-1); 2395 2396 /* 2397 * If quota or reservation is 0, we translate this into 'none' 2398 * (unless literal is set), and indicate that it's the default 2399 * value. Otherwise, we print the number nicely and indicate 2400 * that its set locally. 2401 */ 2402 if (val == 0) { 2403 if (literal) 2404 (void) strlcpy(propbuf, "0", proplen); 2405 else 2406 (void) strlcpy(propbuf, "none", proplen); 2407 } else { 2408 if (literal) 2409 (void) snprintf(propbuf, proplen, "%llu", 2410 (u_longlong_t)val); 2411 else 2412 zfs_nicenum(val, propbuf, proplen); 2413 } 2414 break; 2415 2416 case ZFS_PROP_FILESYSTEM_LIMIT: 2417 case ZFS_PROP_SNAPSHOT_LIMIT: 2418 case ZFS_PROP_FILESYSTEM_COUNT: 2419 case ZFS_PROP_SNAPSHOT_COUNT: 2420 2421 if (get_numeric_property(zhp, prop, src, &source, &val) != 0) 2422 return (-1); 2423 2424 /* 2425 * If limit is UINT64_MAX, we translate this into 'none' (unless 2426 * literal is set), and indicate that it's the default value. 2427 * Otherwise, we print the number nicely and indicate that it's 2428 * set locally. 2429 */ 2430 if (literal) { 2431 (void) snprintf(propbuf, proplen, "%llu", 2432 (u_longlong_t)val); 2433 } else if (val == UINT64_MAX) { 2434 (void) strlcpy(propbuf, "none", proplen); 2435 } else { 2436 zfs_nicenum(val, propbuf, proplen); 2437 } 2438 break; 2439 2440 case ZFS_PROP_REFRATIO: 2441 case ZFS_PROP_COMPRESSRATIO: 2442 if (get_numeric_property(zhp, prop, src, &source, &val) != 0) 2443 return (-1); 2444 (void) snprintf(propbuf, proplen, "%llu.%02llux", 2445 (u_longlong_t)(val / 100), 2446 (u_longlong_t)(val % 100)); 2447 break; 2448 2449 case ZFS_PROP_TYPE: 2450 switch (zhp->zfs_type) { 2451 case ZFS_TYPE_FILESYSTEM: 2452 str = "filesystem"; 2453 break; 2454 case ZFS_TYPE_VOLUME: 2455 str = "volume"; 2456 break; 2457 case ZFS_TYPE_SNAPSHOT: 2458 str = "snapshot"; 2459 break; 2460 case ZFS_TYPE_BOOKMARK: 2461 str = "bookmark"; 2462 break; 2463 default: 2464 abort(); 2465 } 2466 (void) snprintf(propbuf, proplen, "%s", str); 2467 break; 2468 2469 case ZFS_PROP_MOUNTED: 2470 /* 2471 * The 'mounted' property is a pseudo-property that described 2472 * whether the filesystem is currently mounted. Even though 2473 * it's a boolean value, the typical values of "on" and "off" 2474 * don't make sense, so we translate to "yes" and "no". 2475 */ 2476 if (get_numeric_property(zhp, ZFS_PROP_MOUNTED, 2477 src, &source, &val) != 0) 2478 return (-1); 2479 if (val) 2480 (void) strlcpy(propbuf, "yes", proplen); 2481 else 2482 (void) strlcpy(propbuf, "no", proplen); 2483 break; 2484 2485 case ZFS_PROP_NAME: 2486 /* 2487 * The 'name' property is a pseudo-property derived from the 2488 * dataset name. It is presented as a real property to simplify 2489 * consumers. 2490 */ 2491 (void) strlcpy(propbuf, zhp->zfs_name, proplen); 2492 break; 2493 2494 case ZFS_PROP_MLSLABEL: 2495 { 2496#ifdef illumos 2497 m_label_t *new_sl = NULL; 2498 char *ascii = NULL; /* human readable label */ 2499 2500 (void) strlcpy(propbuf, 2501 getprop_string(zhp, prop, &source), proplen); 2502 2503 if (literal || (strcasecmp(propbuf, 2504 ZFS_MLSLABEL_DEFAULT) == 0)) 2505 break; 2506 2507 /* 2508 * Try to translate the internal hex string to 2509 * human-readable output. If there are any 2510 * problems just use the hex string. 2511 */ 2512 2513 if (str_to_label(propbuf, &new_sl, MAC_LABEL, 2514 L_NO_CORRECTION, NULL) == -1) { 2515 m_label_free(new_sl); 2516 break; 2517 } 2518 2519 if (label_to_str(new_sl, &ascii, M_LABEL, 2520 DEF_NAMES) != 0) { 2521 if (ascii) 2522 free(ascii); 2523 m_label_free(new_sl); 2524 break; 2525 } 2526 m_label_free(new_sl); 2527 2528 (void) strlcpy(propbuf, ascii, proplen); 2529 free(ascii); 2530#else /* !illumos */ 2531 propbuf[0] = '\0'; 2532#endif /* illumos */ 2533 } 2534 break; 2535 2536 case ZFS_PROP_GUID: 2537 /* 2538 * GUIDs are stored as numbers, but they are identifiers. 2539 * We don't want them to be pretty printed, because pretty 2540 * printing mangles the ID into a truncated and useless value. 2541 */ 2542 if (get_numeric_property(zhp, prop, src, &source, &val) != 0) 2543 return (-1); 2544 (void) snprintf(propbuf, proplen, "%llu", (u_longlong_t)val); 2545 break; 2546 2547 default: 2548 switch (zfs_prop_get_type(prop)) { 2549 case PROP_TYPE_NUMBER: 2550 if (get_numeric_property(zhp, prop, src, 2551 &source, &val) != 0) 2552 return (-1); 2553 if (literal) 2554 (void) snprintf(propbuf, proplen, "%llu", 2555 (u_longlong_t)val); 2556 else 2557 zfs_nicenum(val, propbuf, proplen); 2558 break; 2559 2560 case PROP_TYPE_STRING: 2561 str = getprop_string(zhp, prop, &source); 2562 if (str == NULL) 2563 return (-1); 2564 (void) strlcpy(propbuf, str, proplen); 2565 break; 2566 2567 case PROP_TYPE_INDEX: 2568 if (get_numeric_property(zhp, prop, src, 2569 &source, &val) != 0) 2570 return (-1); 2571 if (zfs_prop_index_to_string(prop, val, &strval) != 0) 2572 return (-1); 2573 (void) strlcpy(propbuf, strval, proplen); 2574 break; 2575 2576 default: 2577 abort(); 2578 } 2579 } 2580 2581 get_source(zhp, src, source, statbuf, statlen); 2582 2583 return (0); 2584} 2585 2586/* 2587 * Utility function to get the given numeric property. Does no validation that 2588 * the given property is the appropriate type; should only be used with 2589 * hard-coded property types. 2590 */ 2591uint64_t 2592zfs_prop_get_int(zfs_handle_t *zhp, zfs_prop_t prop) 2593{ 2594 char *source; 2595 uint64_t val; 2596 2597 (void) get_numeric_property(zhp, prop, NULL, &source, &val); 2598 2599 return (val); 2600} 2601 2602int 2603zfs_prop_set_int(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t val) 2604{ 2605 char buf[64]; 2606 2607 (void) snprintf(buf, sizeof (buf), "%llu", (longlong_t)val); 2608 return (zfs_prop_set(zhp, zfs_prop_to_name(prop), buf)); 2609} 2610 2611/* 2612 * Similar to zfs_prop_get(), but returns the value as an integer. 2613 */ 2614int 2615zfs_prop_get_numeric(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t *value, 2616 zprop_source_t *src, char *statbuf, size_t statlen) 2617{ 2618 char *source; 2619 2620 /* 2621 * Check to see if this property applies to our object 2622 */ 2623 if (!zfs_prop_valid_for_type(prop, zhp->zfs_type)) { 2624 return (zfs_error_fmt(zhp->zfs_hdl, EZFS_PROPTYPE, 2625 dgettext(TEXT_DOMAIN, "cannot get property '%s'"), 2626 zfs_prop_to_name(prop))); 2627 } 2628 2629 if (src) 2630 *src = ZPROP_SRC_NONE; 2631 2632 if (get_numeric_property(zhp, prop, src, &source, value) != 0) 2633 return (-1); 2634 2635 get_source(zhp, src, source, statbuf, statlen); 2636 2637 return (0); 2638} 2639 2640static int 2641idmap_id_to_numeric_domain_rid(uid_t id, boolean_t isuser, 2642 char **domainp, idmap_rid_t *ridp) 2643{ 2644#ifdef illumos 2645 idmap_get_handle_t *get_hdl = NULL; 2646 idmap_stat status; 2647 int err = EINVAL; 2648 2649 if (idmap_get_create(&get_hdl) != IDMAP_SUCCESS) 2650 goto out; 2651 2652 if (isuser) { 2653 err = idmap_get_sidbyuid(get_hdl, id, 2654 IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status); 2655 } else { 2656 err = idmap_get_sidbygid(get_hdl, id, 2657 IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status); 2658 } 2659 if (err == IDMAP_SUCCESS && 2660 idmap_get_mappings(get_hdl) == IDMAP_SUCCESS && 2661 status == IDMAP_SUCCESS) 2662 err = 0; 2663 else 2664 err = EINVAL; 2665out: 2666 if (get_hdl) 2667 idmap_get_destroy(get_hdl); 2668 return (err); 2669#else /* !illumos */ 2670 assert(!"invalid code path"); 2671 return (EINVAL); // silence compiler warning 2672#endif /* illumos */ 2673} 2674 2675/* 2676 * convert the propname into parameters needed by kernel 2677 * Eg: userquota@ahrens -> ZFS_PROP_USERQUOTA, "", 126829 2678 * Eg: userused@matt@domain -> ZFS_PROP_USERUSED, "S-1-123-456", 789 2679 */ 2680static int 2681userquota_propname_decode(const char *propname, boolean_t zoned, 2682 zfs_userquota_prop_t *typep, char *domain, int domainlen, uint64_t *ridp) 2683{ 2684 zfs_userquota_prop_t type; 2685 char *cp, *end; 2686 char *numericsid = NULL; 2687 boolean_t isuser; 2688 2689 domain[0] = '\0'; 2690 *ridp = 0; 2691 /* Figure out the property type ({user|group}{quota|space}) */ 2692 for (type = 0; type < ZFS_NUM_USERQUOTA_PROPS; type++) { 2693 if (strncmp(propname, zfs_userquota_prop_prefixes[type], 2694 strlen(zfs_userquota_prop_prefixes[type])) == 0) 2695 break; 2696 } 2697 if (type == ZFS_NUM_USERQUOTA_PROPS) 2698 return (EINVAL); 2699 *typep = type; 2700 2701 isuser = (type == ZFS_PROP_USERQUOTA || 2702 type == ZFS_PROP_USERUSED); 2703 2704 cp = strchr(propname, '@') + 1; 2705 2706 if (strchr(cp, '@')) { 2707#ifdef illumos 2708 /* 2709 * It's a SID name (eg "user@domain") that needs to be 2710 * turned into S-1-domainID-RID. 2711 */ 2712 int flag = 0; 2713 idmap_stat stat, map_stat; 2714 uid_t pid; 2715 idmap_rid_t rid; 2716 idmap_get_handle_t *gh = NULL; 2717 2718 stat = idmap_get_create(&gh); 2719 if (stat != IDMAP_SUCCESS) { 2720 idmap_get_destroy(gh); 2721 return (ENOMEM); 2722 } 2723 if (zoned && getzoneid() == GLOBAL_ZONEID) 2724 return (ENOENT); 2725 if (isuser) { 2726 stat = idmap_getuidbywinname(cp, NULL, flag, &pid); 2727 if (stat < 0) 2728 return (ENOENT); 2729 stat = idmap_get_sidbyuid(gh, pid, flag, &numericsid, 2730 &rid, &map_stat); 2731 } else { 2732 stat = idmap_getgidbywinname(cp, NULL, flag, &pid); 2733 if (stat < 0) 2734 return (ENOENT); 2735 stat = idmap_get_sidbygid(gh, pid, flag, &numericsid, 2736 &rid, &map_stat); 2737 } 2738 if (stat < 0) { 2739 idmap_get_destroy(gh); 2740 return (ENOENT); 2741 } 2742 stat = idmap_get_mappings(gh); 2743 idmap_get_destroy(gh); 2744 2745 if (stat < 0) { 2746 return (ENOENT); 2747 } 2748 if (numericsid == NULL) 2749 return (ENOENT); 2750 cp = numericsid; 2751 *ridp = rid; 2752 /* will be further decoded below */ 2753#else /* !illumos */ 2754 return (ENOENT); 2755#endif /* illumos */ 2756 } 2757 2758 if (strncmp(cp, "S-1-", 4) == 0) { 2759 /* It's a numeric SID (eg "S-1-234-567-89") */ 2760 (void) strlcpy(domain, cp, domainlen); 2761 errno = 0; 2762 if (*ridp == 0) { 2763 cp = strrchr(domain, '-'); 2764 *cp = '\0'; 2765 cp++; 2766 *ridp = strtoull(cp, &end, 10); 2767 } else { 2768 end = ""; 2769 } 2770 if (numericsid) { 2771 free(numericsid); 2772 numericsid = NULL; 2773 } 2774 if (errno != 0 || *end != '\0') 2775 return (EINVAL); 2776 } else if (!isdigit(*cp)) { 2777 /* 2778 * It's a user/group name (eg "user") that needs to be 2779 * turned into a uid/gid 2780 */ 2781 if (zoned && getzoneid() == GLOBAL_ZONEID) 2782 return (ENOENT); 2783 if (isuser) { 2784 struct passwd *pw; 2785 pw = getpwnam(cp); 2786 if (pw == NULL) 2787 return (ENOENT); 2788 *ridp = pw->pw_uid; 2789 } else { 2790 struct group *gr; 2791 gr = getgrnam(cp); 2792 if (gr == NULL) 2793 return (ENOENT); 2794 *ridp = gr->gr_gid; 2795 } 2796 } else { 2797 /* It's a user/group ID (eg "12345"). */ 2798 uid_t id = strtoul(cp, &end, 10); 2799 idmap_rid_t rid; 2800 char *mapdomain; 2801 2802 if (*end != '\0') 2803 return (EINVAL); 2804 if (id > MAXUID) { 2805 /* It's an ephemeral ID. */ 2806 if (idmap_id_to_numeric_domain_rid(id, isuser, 2807 &mapdomain, &rid) != 0) 2808 return (ENOENT); 2809 (void) strlcpy(domain, mapdomain, domainlen); 2810 *ridp = rid; 2811 } else { 2812 *ridp = id; 2813 } 2814 } 2815 2816 ASSERT3P(numericsid, ==, NULL); 2817 return (0); 2818} 2819 2820static int 2821zfs_prop_get_userquota_common(zfs_handle_t *zhp, const char *propname, 2822 uint64_t *propvalue, zfs_userquota_prop_t *typep) 2823{ 2824 int err; 2825 zfs_cmd_t zc = { 0 }; 2826 2827 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 2828 2829 err = userquota_propname_decode(propname, 2830 zfs_prop_get_int(zhp, ZFS_PROP_ZONED), 2831 typep, zc.zc_value, sizeof (zc.zc_value), &zc.zc_guid); 2832 zc.zc_objset_type = *typep; 2833 if (err) 2834 return (err); 2835 2836 err = ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_USERSPACE_ONE, &zc); 2837 if (err) 2838 return (err); 2839 2840 *propvalue = zc.zc_cookie; 2841 return (0); 2842} 2843 2844int 2845zfs_prop_get_userquota_int(zfs_handle_t *zhp, const char *propname, 2846 uint64_t *propvalue) 2847{ 2848 zfs_userquota_prop_t type; 2849 2850 return (zfs_prop_get_userquota_common(zhp, propname, propvalue, 2851 &type)); 2852} 2853 2854int 2855zfs_prop_get_userquota(zfs_handle_t *zhp, const char *propname, 2856 char *propbuf, int proplen, boolean_t literal) 2857{ 2858 int err; 2859 uint64_t propvalue; 2860 zfs_userquota_prop_t type; 2861 2862 err = zfs_prop_get_userquota_common(zhp, propname, &propvalue, 2863 &type); 2864 2865 if (err) 2866 return (err); 2867 2868 if (literal) { 2869 (void) snprintf(propbuf, proplen, "%llu", propvalue); 2870 } else if (propvalue == 0 && 2871 (type == ZFS_PROP_USERQUOTA || type == ZFS_PROP_GROUPQUOTA)) { 2872 (void) strlcpy(propbuf, "none", proplen); 2873 } else { 2874 zfs_nicenum(propvalue, propbuf, proplen); 2875 } 2876 return (0); 2877} 2878 2879int 2880zfs_prop_get_written_int(zfs_handle_t *zhp, const char *propname, 2881 uint64_t *propvalue) 2882{ 2883 int err; 2884 zfs_cmd_t zc = { 0 }; 2885 const char *snapname; 2886 2887 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 2888 2889 snapname = strchr(propname, '@') + 1; 2890 if (strchr(snapname, '@')) { 2891 (void) strlcpy(zc.zc_value, snapname, sizeof (zc.zc_value)); 2892 } else { 2893 /* snapname is the short name, append it to zhp's fsname */ 2894 char *cp; 2895 2896 (void) strlcpy(zc.zc_value, zhp->zfs_name, 2897 sizeof (zc.zc_value)); 2898 cp = strchr(zc.zc_value, '@'); 2899 if (cp != NULL) 2900 *cp = '\0'; 2901 (void) strlcat(zc.zc_value, "@", sizeof (zc.zc_value)); 2902 (void) strlcat(zc.zc_value, snapname, sizeof (zc.zc_value)); 2903 } 2904 2905 err = ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_SPACE_WRITTEN, &zc); 2906 if (err) 2907 return (err); 2908 2909 *propvalue = zc.zc_cookie; 2910 return (0); 2911} 2912 2913int 2914zfs_prop_get_written(zfs_handle_t *zhp, const char *propname, 2915 char *propbuf, int proplen, boolean_t literal) 2916{ 2917 int err; 2918 uint64_t propvalue; 2919 2920 err = zfs_prop_get_written_int(zhp, propname, &propvalue); 2921 2922 if (err) 2923 return (err); 2924 2925 if (literal) { 2926 (void) snprintf(propbuf, proplen, "%llu", propvalue); 2927 } else { 2928 zfs_nicenum(propvalue, propbuf, proplen); 2929 } 2930 return (0); 2931} 2932 2933/* 2934 * Returns the name of the given zfs handle. 2935 */ 2936const char * 2937zfs_get_name(const zfs_handle_t *zhp) 2938{ 2939 return (zhp->zfs_name); 2940} 2941 2942/* 2943 * Returns the name of the parent pool for the given zfs handle. 2944 */ 2945const char * 2946zfs_get_pool_name(const zfs_handle_t *zhp) 2947{ 2948 return (zhp->zpool_hdl->zpool_name); 2949} 2950 2951/* 2952 * Returns the type of the given zfs handle. 2953 */ 2954zfs_type_t 2955zfs_get_type(const zfs_handle_t *zhp) 2956{ 2957 return (zhp->zfs_type); 2958} 2959 2960/* 2961 * Is one dataset name a child dataset of another? 2962 * 2963 * Needs to handle these cases: 2964 * Dataset 1 "a/foo" "a/foo" "a/foo" "a/foo" 2965 * Dataset 2 "a/fo" "a/foobar" "a/bar/baz" "a/foo/bar" 2966 * Descendant? No. No. No. Yes. 2967 */ 2968static boolean_t 2969is_descendant(const char *ds1, const char *ds2) 2970{ 2971 size_t d1len = strlen(ds1); 2972 2973 /* ds2 can't be a descendant if it's smaller */ 2974 if (strlen(ds2) < d1len) 2975 return (B_FALSE); 2976 2977 /* otherwise, compare strings and verify that there's a '/' char */ 2978 return (ds2[d1len] == '/' && (strncmp(ds1, ds2, d1len) == 0)); 2979} 2980 2981/* 2982 * Given a complete name, return just the portion that refers to the parent. 2983 * Will return -1 if there is no parent (path is just the name of the 2984 * pool). 2985 */ 2986static int 2987parent_name(const char *path, char *buf, size_t buflen) 2988{ 2989 char *slashp; 2990 2991 (void) strlcpy(buf, path, buflen); 2992 2993 if ((slashp = strrchr(buf, '/')) == NULL) 2994 return (-1); 2995 *slashp = '\0'; 2996 2997 return (0); 2998} 2999 3000/* 3001 * If accept_ancestor is false, then check to make sure that the given path has 3002 * a parent, and that it exists. If accept_ancestor is true, then find the 3003 * closest existing ancestor for the given path. In prefixlen return the 3004 * length of already existing prefix of the given path. We also fetch the 3005 * 'zoned' property, which is used to validate property settings when creating 3006 * new datasets. 3007 */ 3008static int 3009check_parents(libzfs_handle_t *hdl, const char *path, uint64_t *zoned, 3010 boolean_t accept_ancestor, int *prefixlen) 3011{ 3012 zfs_cmd_t zc = { 0 }; 3013 char parent[ZFS_MAX_DATASET_NAME_LEN]; 3014 char *slash; 3015 zfs_handle_t *zhp; 3016 char errbuf[1024]; 3017 uint64_t is_zoned; 3018 3019 (void) snprintf(errbuf, sizeof (errbuf), 3020 dgettext(TEXT_DOMAIN, "cannot create '%s'"), path); 3021 3022 /* get parent, and check to see if this is just a pool */ 3023 if (parent_name(path, parent, sizeof (parent)) != 0) { 3024 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3025 "missing dataset name")); 3026 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3027 } 3028 3029 /* check to see if the pool exists */ 3030 if ((slash = strchr(parent, '/')) == NULL) 3031 slash = parent + strlen(parent); 3032 (void) strncpy(zc.zc_name, parent, slash - parent); 3033 zc.zc_name[slash - parent] = '\0'; 3034 if (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_STATS, &zc) != 0 && 3035 errno == ENOENT) { 3036 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3037 "no such pool '%s'"), zc.zc_name); 3038 return (zfs_error(hdl, EZFS_NOENT, errbuf)); 3039 } 3040 3041 /* check to see if the parent dataset exists */ 3042 while ((zhp = make_dataset_handle(hdl, parent)) == NULL) { 3043 if (errno == ENOENT && accept_ancestor) { 3044 /* 3045 * Go deeper to find an ancestor, give up on top level. 3046 */ 3047 if (parent_name(parent, parent, sizeof (parent)) != 0) { 3048 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3049 "no such pool '%s'"), zc.zc_name); 3050 return (zfs_error(hdl, EZFS_NOENT, errbuf)); 3051 } 3052 } else if (errno == ENOENT) { 3053 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3054 "parent does not exist")); 3055 return (zfs_error(hdl, EZFS_NOENT, errbuf)); 3056 } else 3057 return (zfs_standard_error(hdl, errno, errbuf)); 3058 } 3059 3060 is_zoned = zfs_prop_get_int(zhp, ZFS_PROP_ZONED); 3061 if (zoned != NULL) 3062 *zoned = is_zoned; 3063 3064 /* we are in a non-global zone, but parent is in the global zone */ 3065 if (getzoneid() != GLOBAL_ZONEID && !is_zoned) { 3066 (void) zfs_standard_error(hdl, EPERM, errbuf); 3067 zfs_close(zhp); 3068 return (-1); 3069 } 3070 3071 /* make sure parent is a filesystem */ 3072 if (zfs_get_type(zhp) != ZFS_TYPE_FILESYSTEM) { 3073 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3074 "parent is not a filesystem")); 3075 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf); 3076 zfs_close(zhp); 3077 return (-1); 3078 } 3079 3080 zfs_close(zhp); 3081 if (prefixlen != NULL) 3082 *prefixlen = strlen(parent); 3083 return (0); 3084} 3085 3086/* 3087 * Finds whether the dataset of the given type(s) exists. 3088 */ 3089boolean_t 3090zfs_dataset_exists(libzfs_handle_t *hdl, const char *path, zfs_type_t types) 3091{ 3092 zfs_handle_t *zhp; 3093 3094 if (!zfs_validate_name(hdl, path, types, B_FALSE)) 3095 return (B_FALSE); 3096 3097 /* 3098 * Try to get stats for the dataset, which will tell us if it exists. 3099 */ 3100 if ((zhp = make_dataset_handle(hdl, path)) != NULL) { 3101 int ds_type = zhp->zfs_type; 3102 3103 zfs_close(zhp); 3104 if (types & ds_type) 3105 return (B_TRUE); 3106 } 3107 return (B_FALSE); 3108} 3109 3110/* 3111 * Given a path to 'target', create all the ancestors between 3112 * the prefixlen portion of the path, and the target itself. 3113 * Fail if the initial prefixlen-ancestor does not already exist. 3114 */ 3115int 3116create_parents(libzfs_handle_t *hdl, char *target, int prefixlen) 3117{ 3118 zfs_handle_t *h; 3119 char *cp; 3120 const char *opname; 3121 3122 /* make sure prefix exists */ 3123 cp = target + prefixlen; 3124 if (*cp != '/') { 3125 assert(strchr(cp, '/') == NULL); 3126 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM); 3127 } else { 3128 *cp = '\0'; 3129 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM); 3130 *cp = '/'; 3131 } 3132 if (h == NULL) 3133 return (-1); 3134 zfs_close(h); 3135 3136 /* 3137 * Attempt to create, mount, and share any ancestor filesystems, 3138 * up to the prefixlen-long one. 3139 */ 3140 for (cp = target + prefixlen + 1; 3141 (cp = strchr(cp, '/')) != NULL; *cp = '/', cp++) { 3142 3143 *cp = '\0'; 3144 3145 h = make_dataset_handle(hdl, target); 3146 if (h) { 3147 /* it already exists, nothing to do here */ 3148 zfs_close(h); 3149 continue; 3150 } 3151 3152 if (zfs_create(hdl, target, ZFS_TYPE_FILESYSTEM, 3153 NULL) != 0) { 3154 opname = dgettext(TEXT_DOMAIN, "create"); 3155 goto ancestorerr; 3156 } 3157 3158 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM); 3159 if (h == NULL) { 3160 opname = dgettext(TEXT_DOMAIN, "open"); 3161 goto ancestorerr; 3162 } 3163 3164 if (zfs_mount(h, NULL, 0) != 0) { 3165 opname = dgettext(TEXT_DOMAIN, "mount"); 3166 goto ancestorerr; 3167 } 3168 3169 if (zfs_share(h) != 0) { 3170 opname = dgettext(TEXT_DOMAIN, "share"); 3171 goto ancestorerr; 3172 } 3173 3174 zfs_close(h); 3175 } 3176 3177 return (0); 3178 3179ancestorerr: 3180 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3181 "failed to %s ancestor '%s'"), opname, target); 3182 return (-1); 3183} 3184 3185/* 3186 * Creates non-existing ancestors of the given path. 3187 */ 3188int 3189zfs_create_ancestors(libzfs_handle_t *hdl, const char *path) 3190{ 3191 int prefix; 3192 char *path_copy; 3193 int rc = 0; 3194 3195 if (check_parents(hdl, path, NULL, B_TRUE, &prefix) != 0) 3196 return (-1); 3197 3198 if ((path_copy = strdup(path)) != NULL) { 3199 rc = create_parents(hdl, path_copy, prefix); 3200 free(path_copy); 3201 } 3202 if (path_copy == NULL || rc != 0) 3203 return (-1); 3204 3205 return (0); 3206} 3207 3208/* 3209 * Create a new filesystem or volume. 3210 */ 3211int 3212zfs_create(libzfs_handle_t *hdl, const char *path, zfs_type_t type, 3213 nvlist_t *props) 3214{ 3215 int ret; 3216 uint64_t size = 0; 3217 uint64_t blocksize = zfs_prop_default_numeric(ZFS_PROP_VOLBLOCKSIZE); 3218 char errbuf[1024]; 3219 uint64_t zoned; 3220 enum lzc_dataset_type ost; 3221 3222 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3223 "cannot create '%s'"), path); 3224 3225 /* validate the path, taking care to note the extended error message */ 3226 if (!zfs_validate_name(hdl, path, type, B_TRUE)) 3227 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3228 3229 /* validate parents exist */ 3230 if (check_parents(hdl, path, &zoned, B_FALSE, NULL) != 0) 3231 return (-1); 3232 3233 /* 3234 * The failure modes when creating a dataset of a different type over 3235 * one that already exists is a little strange. In particular, if you 3236 * try to create a dataset on top of an existing dataset, the ioctl() 3237 * will return ENOENT, not EEXIST. To prevent this from happening, we 3238 * first try to see if the dataset exists. 3239 */ 3240 if (zfs_dataset_exists(hdl, path, ZFS_TYPE_DATASET)) { 3241 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3242 "dataset already exists")); 3243 return (zfs_error(hdl, EZFS_EXISTS, errbuf)); 3244 } 3245 3246 if (type == ZFS_TYPE_VOLUME) 3247 ost = LZC_DATSET_TYPE_ZVOL; 3248 else 3249 ost = LZC_DATSET_TYPE_ZFS; 3250 3251 /* open zpool handle for prop validation */ 3252 char pool_path[ZFS_MAX_DATASET_NAME_LEN]; 3253 (void) strlcpy(pool_path, path, sizeof (pool_path)); 3254 3255 /* truncate pool_path at first slash */ 3256 char *p = strchr(pool_path, '/'); 3257 if (p != NULL) 3258 *p = '\0'; 3259 3260 zpool_handle_t *zpool_handle = zpool_open(hdl, pool_path); 3261 3262 if (props && (props = zfs_valid_proplist(hdl, type, props, 3263 zoned, NULL, zpool_handle, errbuf)) == 0) { 3264 zpool_close(zpool_handle); 3265 return (-1); 3266 } 3267 zpool_close(zpool_handle); 3268 3269 if (type == ZFS_TYPE_VOLUME) { 3270 /* 3271 * If we are creating a volume, the size and block size must 3272 * satisfy a few restraints. First, the blocksize must be a 3273 * valid block size between SPA_{MIN,MAX}BLOCKSIZE. Second, the 3274 * volsize must be a multiple of the block size, and cannot be 3275 * zero. 3276 */ 3277 if (props == NULL || nvlist_lookup_uint64(props, 3278 zfs_prop_to_name(ZFS_PROP_VOLSIZE), &size) != 0) { 3279 nvlist_free(props); 3280 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3281 "missing volume size")); 3282 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 3283 } 3284 3285 if ((ret = nvlist_lookup_uint64(props, 3286 zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE), 3287 &blocksize)) != 0) { 3288 if (ret == ENOENT) { 3289 blocksize = zfs_prop_default_numeric( 3290 ZFS_PROP_VOLBLOCKSIZE); 3291 } else { 3292 nvlist_free(props); 3293 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3294 "missing volume block size")); 3295 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 3296 } 3297 } 3298 3299 if (size == 0) { 3300 nvlist_free(props); 3301 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3302 "volume size cannot be zero")); 3303 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 3304 } 3305 3306 if (size % blocksize != 0) { 3307 nvlist_free(props); 3308 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3309 "volume size must be a multiple of volume block " 3310 "size")); 3311 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 3312 } 3313 } 3314 3315 /* create the dataset */ 3316 ret = lzc_create(path, ost, props); 3317 nvlist_free(props); 3318 3319 /* check for failure */ 3320 if (ret != 0) { 3321 char parent[ZFS_MAX_DATASET_NAME_LEN]; 3322 (void) parent_name(path, parent, sizeof (parent)); 3323 3324 switch (errno) { 3325 case ENOENT: 3326 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3327 "no such parent '%s'"), parent); 3328 return (zfs_error(hdl, EZFS_NOENT, errbuf)); 3329 3330 case EINVAL: 3331 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3332 "parent '%s' is not a filesystem"), parent); 3333 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 3334 3335 case ENOTSUP: 3336 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3337 "pool must be upgraded to set this " 3338 "property or value")); 3339 return (zfs_error(hdl, EZFS_BADVERSION, errbuf)); 3340#ifdef _ILP32 3341 case EOVERFLOW: 3342 /* 3343 * This platform can't address a volume this big. 3344 */ 3345 if (type == ZFS_TYPE_VOLUME) 3346 return (zfs_error(hdl, EZFS_VOLTOOBIG, 3347 errbuf)); 3348#endif 3349 /* FALLTHROUGH */ 3350 default: 3351 return (zfs_standard_error(hdl, errno, errbuf)); 3352 } 3353 } 3354 3355 return (0); 3356} 3357 3358/* 3359 * Destroys the given dataset. The caller must make sure that the filesystem 3360 * isn't mounted, and that there are no active dependents. If the file system 3361 * does not exist this function does nothing. 3362 */ 3363int 3364zfs_destroy(zfs_handle_t *zhp, boolean_t defer) 3365{ 3366 zfs_cmd_t zc = { 0 }; 3367 3368 if (zhp->zfs_type == ZFS_TYPE_BOOKMARK) { 3369 nvlist_t *nv = fnvlist_alloc(); 3370 fnvlist_add_boolean(nv, zhp->zfs_name); 3371 int error = lzc_destroy_bookmarks(nv, NULL); 3372 fnvlist_free(nv); 3373 if (error != 0) { 3374 return (zfs_standard_error_fmt(zhp->zfs_hdl, errno, 3375 dgettext(TEXT_DOMAIN, "cannot destroy '%s'"), 3376 zhp->zfs_name)); 3377 } 3378 return (0); 3379 } 3380 3381 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 3382 3383 if (ZFS_IS_VOLUME(zhp)) { 3384 zc.zc_objset_type = DMU_OST_ZVOL; 3385 } else { 3386 zc.zc_objset_type = DMU_OST_ZFS; 3387 } 3388 3389 zc.zc_defer_destroy = defer; 3390 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_DESTROY, &zc) != 0 && 3391 errno != ENOENT) { 3392 return (zfs_standard_error_fmt(zhp->zfs_hdl, errno, 3393 dgettext(TEXT_DOMAIN, "cannot destroy '%s'"), 3394 zhp->zfs_name)); 3395 } 3396 3397 remove_mountpoint(zhp); 3398 3399 return (0); 3400} 3401 3402struct destroydata { 3403 nvlist_t *nvl; 3404 const char *snapname; 3405}; 3406 3407static int 3408zfs_check_snap_cb(zfs_handle_t *zhp, void *arg) 3409{ 3410 struct destroydata *dd = arg; 3411 char name[ZFS_MAX_DATASET_NAME_LEN]; 3412 int rv = 0; 3413 3414 (void) snprintf(name, sizeof (name), 3415 "%s@%s", zhp->zfs_name, dd->snapname); 3416 3417 if (lzc_exists(name)) 3418 verify(nvlist_add_boolean(dd->nvl, name) == 0); 3419 3420 rv = zfs_iter_filesystems(zhp, zfs_check_snap_cb, dd); 3421 zfs_close(zhp); 3422 return (rv); 3423} 3424 3425/* 3426 * Destroys all snapshots with the given name in zhp & descendants. 3427 */ 3428int 3429zfs_destroy_snaps(zfs_handle_t *zhp, char *snapname, boolean_t defer) 3430{ 3431 int ret; 3432 struct destroydata dd = { 0 }; 3433 3434 dd.snapname = snapname; 3435 verify(nvlist_alloc(&dd.nvl, NV_UNIQUE_NAME, 0) == 0); 3436 (void) zfs_check_snap_cb(zfs_handle_dup(zhp), &dd); 3437 3438 if (nvlist_empty(dd.nvl)) { 3439 ret = zfs_standard_error_fmt(zhp->zfs_hdl, ENOENT, 3440 dgettext(TEXT_DOMAIN, "cannot destroy '%s@%s'"), 3441 zhp->zfs_name, snapname); 3442 } else { 3443 ret = zfs_destroy_snaps_nvl(zhp->zfs_hdl, dd.nvl, defer); 3444 } 3445 nvlist_free(dd.nvl); 3446 return (ret); 3447} 3448 3449/* 3450 * Destroys all the snapshots named in the nvlist. 3451 */ 3452int 3453zfs_destroy_snaps_nvl(libzfs_handle_t *hdl, nvlist_t *snaps, boolean_t defer) 3454{ 3455 int ret; 3456 nvlist_t *errlist = NULL; 3457 3458 ret = lzc_destroy_snaps(snaps, defer, &errlist); 3459 3460 if (ret == 0) { 3461 nvlist_free(errlist); 3462 return (0); 3463 } 3464 3465 if (nvlist_empty(errlist)) { 3466 char errbuf[1024]; 3467 (void) snprintf(errbuf, sizeof (errbuf), 3468 dgettext(TEXT_DOMAIN, "cannot destroy snapshots")); 3469 3470 ret = zfs_standard_error(hdl, ret, errbuf); 3471 } 3472 for (nvpair_t *pair = nvlist_next_nvpair(errlist, NULL); 3473 pair != NULL; pair = nvlist_next_nvpair(errlist, pair)) { 3474 char errbuf[1024]; 3475 (void) snprintf(errbuf, sizeof (errbuf), 3476 dgettext(TEXT_DOMAIN, "cannot destroy snapshot %s"), 3477 nvpair_name(pair)); 3478 3479 switch (fnvpair_value_int32(pair)) { 3480 case EEXIST: 3481 zfs_error_aux(hdl, 3482 dgettext(TEXT_DOMAIN, "snapshot is cloned")); 3483 ret = zfs_error(hdl, EZFS_EXISTS, errbuf); 3484 break; 3485 default: 3486 ret = zfs_standard_error(hdl, errno, errbuf); 3487 break; 3488 } 3489 } 3490 3491 nvlist_free(errlist); 3492 return (ret); 3493} 3494 3495/* 3496 * Clones the given dataset. The target must be of the same type as the source. 3497 */ 3498int 3499zfs_clone(zfs_handle_t *zhp, const char *target, nvlist_t *props) 3500{ 3501 char parent[ZFS_MAX_DATASET_NAME_LEN]; 3502 int ret; 3503 char errbuf[1024]; 3504 libzfs_handle_t *hdl = zhp->zfs_hdl; 3505 uint64_t zoned; 3506 3507 assert(zhp->zfs_type == ZFS_TYPE_SNAPSHOT); 3508 3509 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3510 "cannot create '%s'"), target); 3511 3512 /* validate the target/clone name */ 3513 if (!zfs_validate_name(hdl, target, ZFS_TYPE_FILESYSTEM, B_TRUE)) 3514 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3515 3516 /* validate parents exist */ 3517 if (check_parents(hdl, target, &zoned, B_FALSE, NULL) != 0) 3518 return (-1); 3519 3520 (void) parent_name(target, parent, sizeof (parent)); 3521 3522 /* do the clone */ 3523 3524 if (props) { 3525 zfs_type_t type; 3526 if (ZFS_IS_VOLUME(zhp)) { 3527 type = ZFS_TYPE_VOLUME; 3528 } else { 3529 type = ZFS_TYPE_FILESYSTEM; 3530 } 3531 if ((props = zfs_valid_proplist(hdl, type, props, zoned, 3532 zhp, zhp->zpool_hdl, errbuf)) == NULL) 3533 return (-1); 3534 } 3535 3536 ret = lzc_clone(target, zhp->zfs_name, props); 3537 nvlist_free(props); 3538 3539 if (ret != 0) { 3540 switch (errno) { 3541 3542 case ENOENT: 3543 /* 3544 * The parent doesn't exist. We should have caught this 3545 * above, but there may a race condition that has since 3546 * destroyed the parent. 3547 * 3548 * At this point, we don't know whether it's the source 3549 * that doesn't exist anymore, or whether the target 3550 * dataset doesn't exist. 3551 */ 3552 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN, 3553 "no such parent '%s'"), parent); 3554 return (zfs_error(zhp->zfs_hdl, EZFS_NOENT, errbuf)); 3555 3556 case EXDEV: 3557 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN, 3558 "source and target pools differ")); 3559 return (zfs_error(zhp->zfs_hdl, EZFS_CROSSTARGET, 3560 errbuf)); 3561 3562 default: 3563 return (zfs_standard_error(zhp->zfs_hdl, errno, 3564 errbuf)); 3565 } 3566 } 3567 3568 return (ret); 3569} 3570 3571/* 3572 * Promotes the given clone fs to be the clone parent. 3573 */ 3574int 3575zfs_promote(zfs_handle_t *zhp) 3576{ 3577 libzfs_handle_t *hdl = zhp->zfs_hdl; 3578 zfs_cmd_t zc = { 0 }; 3579 char parent[MAXPATHLEN]; 3580 int ret; 3581 char errbuf[1024]; 3582 3583 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3584 "cannot promote '%s'"), zhp->zfs_name); 3585 3586 if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) { 3587 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3588 "snapshots can not be promoted")); 3589 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 3590 } 3591 3592 (void) strlcpy(parent, zhp->zfs_dmustats.dds_origin, sizeof (parent)); 3593 if (parent[0] == '\0') { 3594 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3595 "not a cloned filesystem")); 3596 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 3597 } 3598 3599 (void) strlcpy(zc.zc_value, zhp->zfs_dmustats.dds_origin, 3600 sizeof (zc.zc_value)); 3601 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 3602 ret = zfs_ioctl(hdl, ZFS_IOC_PROMOTE, &zc); 3603 3604 if (ret != 0) { 3605 int save_errno = errno; 3606 3607 switch (save_errno) { 3608 case EEXIST: 3609 /* There is a conflicting snapshot name. */ 3610 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3611 "conflicting snapshot '%s' from parent '%s'"), 3612 zc.zc_string, parent); 3613 return (zfs_error(hdl, EZFS_EXISTS, errbuf)); 3614 3615 default: 3616 return (zfs_standard_error(hdl, save_errno, errbuf)); 3617 } 3618 } 3619 return (ret); 3620} 3621 3622typedef struct snapdata { 3623 nvlist_t *sd_nvl; 3624 const char *sd_snapname; 3625} snapdata_t; 3626 3627static int 3628zfs_snapshot_cb(zfs_handle_t *zhp, void *arg) 3629{ 3630 snapdata_t *sd = arg; 3631 char name[ZFS_MAX_DATASET_NAME_LEN]; 3632 int rv = 0; 3633 3634 if (zfs_prop_get_int(zhp, ZFS_PROP_INCONSISTENT) == 0) { 3635 (void) snprintf(name, sizeof (name), 3636 "%s@%s", zfs_get_name(zhp), sd->sd_snapname); 3637 3638 fnvlist_add_boolean(sd->sd_nvl, name); 3639 3640 rv = zfs_iter_filesystems(zhp, zfs_snapshot_cb, sd); 3641 } 3642 zfs_close(zhp); 3643 3644 return (rv); 3645} 3646 3647/* 3648 * Creates snapshots. The keys in the snaps nvlist are the snapshots to be 3649 * created. 3650 */ 3651int 3652zfs_snapshot_nvl(libzfs_handle_t *hdl, nvlist_t *snaps, nvlist_t *props) 3653{ 3654 int ret; 3655 char errbuf[1024]; 3656 nvpair_t *elem; 3657 nvlist_t *errors; 3658 3659 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3660 "cannot create snapshots ")); 3661 3662 elem = NULL; 3663 while ((elem = nvlist_next_nvpair(snaps, elem)) != NULL) { 3664 const char *snapname = nvpair_name(elem); 3665 3666 /* validate the target name */ 3667 if (!zfs_validate_name(hdl, snapname, ZFS_TYPE_SNAPSHOT, 3668 B_TRUE)) { 3669 (void) snprintf(errbuf, sizeof (errbuf), 3670 dgettext(TEXT_DOMAIN, 3671 "cannot create snapshot '%s'"), snapname); 3672 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3673 } 3674 } 3675 3676 /* 3677 * get pool handle for prop validation. assumes all snaps are in the 3678 * same pool, as does lzc_snapshot (below). 3679 */ 3680 char pool[ZFS_MAX_DATASET_NAME_LEN]; 3681 elem = nvlist_next_nvpair(snaps, NULL); 3682 (void) strlcpy(pool, nvpair_name(elem), sizeof (pool)); 3683 pool[strcspn(pool, "/@")] = '\0'; 3684 zpool_handle_t *zpool_hdl = zpool_open(hdl, pool); 3685 3686 if (props != NULL && 3687 (props = zfs_valid_proplist(hdl, ZFS_TYPE_SNAPSHOT, 3688 props, B_FALSE, NULL, zpool_hdl, errbuf)) == NULL) { 3689 zpool_close(zpool_hdl); 3690 return (-1); 3691 } 3692 zpool_close(zpool_hdl); 3693 3694 ret = lzc_snapshot(snaps, props, &errors); 3695 3696 if (ret != 0) { 3697 boolean_t printed = B_FALSE; 3698 for (elem = nvlist_next_nvpair(errors, NULL); 3699 elem != NULL; 3700 elem = nvlist_next_nvpair(errors, elem)) { 3701 (void) snprintf(errbuf, sizeof (errbuf), 3702 dgettext(TEXT_DOMAIN, 3703 "cannot create snapshot '%s'"), nvpair_name(elem)); 3704 (void) zfs_standard_error(hdl, 3705 fnvpair_value_int32(elem), errbuf); 3706 printed = B_TRUE; 3707 } 3708 if (!printed) { 3709 switch (ret) { 3710 case EXDEV: 3711 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3712 "multiple snapshots of same " 3713 "fs not allowed")); 3714 (void) zfs_error(hdl, EZFS_EXISTS, errbuf); 3715 3716 break; 3717 default: 3718 (void) zfs_standard_error(hdl, ret, errbuf); 3719 } 3720 } 3721 } 3722 3723 nvlist_free(props); 3724 nvlist_free(errors); 3725 return (ret); 3726} 3727 3728int 3729zfs_snapshot(libzfs_handle_t *hdl, const char *path, boolean_t recursive, 3730 nvlist_t *props) 3731{ 3732 int ret; 3733 snapdata_t sd = { 0 }; 3734 char fsname[ZFS_MAX_DATASET_NAME_LEN]; 3735 char *cp; 3736 zfs_handle_t *zhp; 3737 char errbuf[1024]; 3738 3739 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3740 "cannot snapshot %s"), path); 3741 3742 if (!zfs_validate_name(hdl, path, ZFS_TYPE_SNAPSHOT, B_TRUE)) 3743 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3744 3745 (void) strlcpy(fsname, path, sizeof (fsname)); 3746 cp = strchr(fsname, '@'); 3747 *cp = '\0'; 3748 sd.sd_snapname = cp + 1; 3749 3750 if ((zhp = zfs_open(hdl, fsname, ZFS_TYPE_FILESYSTEM | 3751 ZFS_TYPE_VOLUME)) == NULL) { 3752 return (-1); 3753 } 3754 3755 verify(nvlist_alloc(&sd.sd_nvl, NV_UNIQUE_NAME, 0) == 0); 3756 if (recursive) { 3757 (void) zfs_snapshot_cb(zfs_handle_dup(zhp), &sd); 3758 } else { 3759 fnvlist_add_boolean(sd.sd_nvl, path); 3760 } 3761 3762 ret = zfs_snapshot_nvl(hdl, sd.sd_nvl, props); 3763 nvlist_free(sd.sd_nvl); 3764 zfs_close(zhp); 3765 return (ret); 3766} 3767 3768/* 3769 * Destroy any more recent snapshots. We invoke this callback on any dependents 3770 * of the snapshot first. If the 'cb_dependent' member is non-zero, then this 3771 * is a dependent and we should just destroy it without checking the transaction 3772 * group. 3773 */ 3774typedef struct rollback_data { 3775 const char *cb_target; /* the snapshot */ 3776 uint64_t cb_create; /* creation time reference */ 3777 boolean_t cb_error; 3778 boolean_t cb_force; 3779} rollback_data_t; 3780 3781static int 3782rollback_destroy_dependent(zfs_handle_t *zhp, void *data) 3783{ 3784 rollback_data_t *cbp = data; 3785 prop_changelist_t *clp; 3786 3787 /* We must destroy this clone; first unmount it */ 3788 clp = changelist_gather(zhp, ZFS_PROP_NAME, 0, 3789 cbp->cb_force ? MS_FORCE: 0); 3790 if (clp == NULL || changelist_prefix(clp) != 0) { 3791 cbp->cb_error = B_TRUE; 3792 zfs_close(zhp); 3793 return (0); 3794 } 3795 if (zfs_destroy(zhp, B_FALSE) != 0) 3796 cbp->cb_error = B_TRUE; 3797 else 3798 changelist_remove(clp, zhp->zfs_name); 3799 (void) changelist_postfix(clp); 3800 changelist_free(clp); 3801 3802 zfs_close(zhp); 3803 return (0); 3804} 3805 3806static int 3807rollback_destroy(zfs_handle_t *zhp, void *data) 3808{ 3809 rollback_data_t *cbp = data; 3810 3811 if (zfs_prop_get_int(zhp, ZFS_PROP_CREATETXG) > cbp->cb_create) { 3812 cbp->cb_error |= zfs_iter_dependents(zhp, B_FALSE, 3813 rollback_destroy_dependent, cbp); 3814 3815 cbp->cb_error |= zfs_destroy(zhp, B_FALSE); 3816 } 3817 3818 zfs_close(zhp); 3819 return (0); 3820} 3821 3822/* 3823 * Given a dataset, rollback to a specific snapshot, discarding any 3824 * data changes since then and making it the active dataset. 3825 * 3826 * Any snapshots and bookmarks more recent than the target are 3827 * destroyed, along with their dependents (i.e. clones). 3828 */ 3829int 3830zfs_rollback(zfs_handle_t *zhp, zfs_handle_t *snap, boolean_t force) 3831{ 3832 rollback_data_t cb = { 0 }; 3833 int err; 3834 boolean_t restore_resv = 0; 3835 uint64_t old_volsize = 0, new_volsize; 3836 zfs_prop_t resv_prop; 3837 3838 assert(zhp->zfs_type == ZFS_TYPE_FILESYSTEM || 3839 zhp->zfs_type == ZFS_TYPE_VOLUME); 3840 3841 /* 3842 * Destroy all recent snapshots and their dependents. 3843 */ 3844 cb.cb_force = force; 3845 cb.cb_target = snap->zfs_name; 3846 cb.cb_create = zfs_prop_get_int(snap, ZFS_PROP_CREATETXG); 3847 (void) zfs_iter_snapshots(zhp, B_FALSE, rollback_destroy, &cb); 3848 (void) zfs_iter_bookmarks(zhp, rollback_destroy, &cb); 3849 3850 if (cb.cb_error) 3851 return (-1); 3852 3853 /* 3854 * Now that we have verified that the snapshot is the latest, 3855 * rollback to the given snapshot. 3856 */ 3857 3858 if (zhp->zfs_type == ZFS_TYPE_VOLUME) { 3859 if (zfs_which_resv_prop(zhp, &resv_prop) < 0) 3860 return (-1); 3861 old_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE); 3862 restore_resv = 3863 (old_volsize == zfs_prop_get_int(zhp, resv_prop)); 3864 } 3865 3866 /* 3867 * We rely on zfs_iter_children() to verify that there are no 3868 * newer snapshots for the given dataset. Therefore, we can 3869 * simply pass the name on to the ioctl() call. There is still 3870 * an unlikely race condition where the user has taken a 3871 * snapshot since we verified that this was the most recent. 3872 */ 3873 err = lzc_rollback(zhp->zfs_name, NULL, 0); 3874 if (err != 0) { 3875 (void) zfs_standard_error_fmt(zhp->zfs_hdl, errno, 3876 dgettext(TEXT_DOMAIN, "cannot rollback '%s'"), 3877 zhp->zfs_name); 3878 return (err); 3879 } 3880 3881 /* 3882 * For volumes, if the pre-rollback volsize matched the pre- 3883 * rollback reservation and the volsize has changed then set 3884 * the reservation property to the post-rollback volsize. 3885 * Make a new handle since the rollback closed the dataset. 3886 */ 3887 if ((zhp->zfs_type == ZFS_TYPE_VOLUME) && 3888 (zhp = make_dataset_handle(zhp->zfs_hdl, zhp->zfs_name))) { 3889 if (restore_resv) { 3890 new_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE); 3891 if (old_volsize != new_volsize) 3892 err = zfs_prop_set_int(zhp, resv_prop, 3893 new_volsize); 3894 } 3895 zfs_close(zhp); 3896 } 3897 return (err); 3898} 3899 3900/* 3901 * Renames the given dataset. 3902 */ 3903int 3904zfs_rename(zfs_handle_t *zhp, const char *source, const char *target, 3905 renameflags_t flags) 3906{ 3907 int ret = 0; 3908 zfs_cmd_t zc = { 0 }; 3909 char *delim; 3910 prop_changelist_t *cl = NULL; 3911 zfs_handle_t *zhrp = NULL; 3912 char *parentname = NULL; 3913 char parent[ZFS_MAX_DATASET_NAME_LEN]; 3914 char property[ZFS_MAXPROPLEN]; 3915 libzfs_handle_t *hdl = zhp->zfs_hdl; 3916 char errbuf[1024]; 3917 3918 /* if we have the same exact name, just return success */ 3919 if (strcmp(zhp->zfs_name, target) == 0) 3920 return (0); 3921 3922 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3923 "cannot rename to '%s'"), target); 3924 3925 if (source != NULL) { 3926 /* 3927 * This is recursive snapshots rename, put snapshot name 3928 * (that might not exist) into zfs_name. 3929 */ 3930 assert(flags.recurse); 3931 3932 (void) strlcat(zhp->zfs_name, "@", sizeof(zhp->zfs_name)); 3933 (void) strlcat(zhp->zfs_name, source, sizeof(zhp->zfs_name)); 3934 zhp->zfs_type = ZFS_TYPE_SNAPSHOT; 3935 } 3936 3937 /* 3938 * Make sure the target name is valid 3939 */ 3940 if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) { 3941 if ((strchr(target, '@') == NULL) || 3942 *target == '@') { 3943 /* 3944 * Snapshot target name is abbreviated, 3945 * reconstruct full dataset name 3946 */ 3947 (void) strlcpy(parent, zhp->zfs_name, 3948 sizeof (parent)); 3949 delim = strchr(parent, '@'); 3950 if (strchr(target, '@') == NULL) 3951 *(++delim) = '\0'; 3952 else 3953 *delim = '\0'; 3954 (void) strlcat(parent, target, sizeof (parent)); 3955 target = parent; 3956 } else { 3957 /* 3958 * Make sure we're renaming within the same dataset. 3959 */ 3960 delim = strchr(target, '@'); 3961 if (strncmp(zhp->zfs_name, target, delim - target) 3962 != 0 || zhp->zfs_name[delim - target] != '@') { 3963 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3964 "snapshots must be part of same " 3965 "dataset")); 3966 return (zfs_error(hdl, EZFS_CROSSTARGET, 3967 errbuf)); 3968 } 3969 } 3970 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE)) 3971 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3972 } else { 3973 if (flags.recurse) { 3974 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3975 "recursive rename must be a snapshot")); 3976 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 3977 } 3978 3979 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE)) 3980 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3981 3982 /* validate parents */ 3983 if (check_parents(hdl, target, NULL, B_FALSE, NULL) != 0) 3984 return (-1); 3985 3986 /* make sure we're in the same pool */ 3987 verify((delim = strchr(target, '/')) != NULL); 3988 if (strncmp(zhp->zfs_name, target, delim - target) != 0 || 3989 zhp->zfs_name[delim - target] != '/') { 3990 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3991 "datasets must be within same pool")); 3992 return (zfs_error(hdl, EZFS_CROSSTARGET, errbuf)); 3993 } 3994 3995 /* new name cannot be a child of the current dataset name */ 3996 if (is_descendant(zhp->zfs_name, target)) { 3997 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3998 "New dataset name cannot be a descendant of " 3999 "current dataset name")); 4000 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 4001 } 4002 } 4003 4004 (void) snprintf(errbuf, sizeof (errbuf), 4005 dgettext(TEXT_DOMAIN, "cannot rename '%s'"), zhp->zfs_name); 4006 4007 if (getzoneid() == GLOBAL_ZONEID && 4008 zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) { 4009 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4010 "dataset is used in a non-global zone")); 4011 return (zfs_error(hdl, EZFS_ZONED, errbuf)); 4012 } 4013 4014 /* 4015 * Avoid unmounting file systems with mountpoint property set to 4016 * 'legacy' or 'none' even if -u option is not given. 4017 */ 4018 if (zhp->zfs_type == ZFS_TYPE_FILESYSTEM && 4019 !flags.recurse && !flags.nounmount && 4020 zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, property, 4021 sizeof (property), NULL, NULL, 0, B_FALSE) == 0 && 4022 (strcmp(property, "legacy") == 0 || 4023 strcmp(property, "none") == 0)) { 4024 flags.nounmount = B_TRUE; 4025 } 4026 if (flags.recurse) { 4027 4028 parentname = zfs_strdup(zhp->zfs_hdl, zhp->zfs_name); 4029 if (parentname == NULL) { 4030 ret = -1; 4031 goto error; 4032 } 4033 delim = strchr(parentname, '@'); 4034 *delim = '\0'; 4035 zhrp = zfs_open(zhp->zfs_hdl, parentname, ZFS_TYPE_DATASET); 4036 if (zhrp == NULL) { 4037 ret = -1; 4038 goto error; 4039 } 4040 } else if (zhp->zfs_type != ZFS_TYPE_SNAPSHOT) { 4041 if ((cl = changelist_gather(zhp, ZFS_PROP_NAME, 4042 flags.nounmount ? CL_GATHER_DONT_UNMOUNT : 0, 4043 flags.forceunmount ? MS_FORCE : 0)) == NULL) { 4044 return (-1); 4045 } 4046 4047 if (changelist_haszonedchild(cl)) { 4048 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4049 "child dataset with inherited mountpoint is used " 4050 "in a non-global zone")); 4051 (void) zfs_error(hdl, EZFS_ZONED, errbuf); 4052 ret = -1; 4053 goto error; 4054 } 4055 4056 if ((ret = changelist_prefix(cl)) != 0) 4057 goto error; 4058 } 4059 4060 if (ZFS_IS_VOLUME(zhp)) 4061 zc.zc_objset_type = DMU_OST_ZVOL; 4062 else 4063 zc.zc_objset_type = DMU_OST_ZFS; 4064 4065 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 4066 (void) strlcpy(zc.zc_value, target, sizeof (zc.zc_value)); 4067 4068 zc.zc_cookie = flags.recurse ? 1 : 0; 4069 if (flags.nounmount) 4070 zc.zc_cookie |= 2; 4071 4072 if ((ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_RENAME, &zc)) != 0) { 4073 /* 4074 * if it was recursive, the one that actually failed will 4075 * be in zc.zc_name 4076 */ 4077 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 4078 "cannot rename '%s'"), zc.zc_name); 4079 4080 if (flags.recurse && errno == EEXIST) { 4081 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4082 "a child dataset already has a snapshot " 4083 "with the new name")); 4084 (void) zfs_error(hdl, EZFS_EXISTS, errbuf); 4085 } else { 4086 (void) zfs_standard_error(zhp->zfs_hdl, errno, errbuf); 4087 } 4088 4089 /* 4090 * On failure, we still want to remount any filesystems that 4091 * were previously mounted, so we don't alter the system state. 4092 */ 4093 if (cl != NULL) 4094 (void) changelist_postfix(cl); 4095 } else { 4096 if (cl != NULL) { 4097 changelist_rename(cl, zfs_get_name(zhp), target); 4098 ret = changelist_postfix(cl); 4099 } 4100 } 4101 4102error: 4103 if (parentname != NULL) { 4104 free(parentname); 4105 } 4106 if (zhrp != NULL) { 4107 zfs_close(zhrp); 4108 } 4109 if (cl != NULL) { 4110 changelist_free(cl); 4111 } 4112 return (ret); 4113} 4114 4115nvlist_t * 4116zfs_get_user_props(zfs_handle_t *zhp) 4117{ 4118 return (zhp->zfs_user_props); 4119} 4120 4121nvlist_t * 4122zfs_get_recvd_props(zfs_handle_t *zhp) 4123{ 4124 if (zhp->zfs_recvd_props == NULL) 4125 if (get_recvd_props_ioctl(zhp) != 0) 4126 return (NULL); 4127 return (zhp->zfs_recvd_props); 4128} 4129 4130/* 4131 * This function is used by 'zfs list' to determine the exact set of columns to 4132 * display, and their maximum widths. This does two main things: 4133 * 4134 * - If this is a list of all properties, then expand the list to include 4135 * all native properties, and set a flag so that for each dataset we look 4136 * for new unique user properties and add them to the list. 4137 * 4138 * - For non fixed-width properties, keep track of the maximum width seen 4139 * so that we can size the column appropriately. If the user has 4140 * requested received property values, we also need to compute the width 4141 * of the RECEIVED column. 4142 */ 4143int 4144zfs_expand_proplist(zfs_handle_t *zhp, zprop_list_t **plp, boolean_t received, 4145 boolean_t literal) 4146{ 4147 libzfs_handle_t *hdl = zhp->zfs_hdl; 4148 zprop_list_t *entry; 4149 zprop_list_t **last, **start; 4150 nvlist_t *userprops, *propval; 4151 nvpair_t *elem; 4152 char *strval; 4153 char buf[ZFS_MAXPROPLEN]; 4154 4155 if (zprop_expand_list(hdl, plp, ZFS_TYPE_DATASET) != 0) 4156 return (-1); 4157 4158 userprops = zfs_get_user_props(zhp); 4159 4160 entry = *plp; 4161 if (entry->pl_all && nvlist_next_nvpair(userprops, NULL) != NULL) { 4162 /* 4163 * Go through and add any user properties as necessary. We 4164 * start by incrementing our list pointer to the first 4165 * non-native property. 4166 */ 4167 start = plp; 4168 while (*start != NULL) { 4169 if ((*start)->pl_prop == ZPROP_INVAL) 4170 break; 4171 start = &(*start)->pl_next; 4172 } 4173 4174 elem = NULL; 4175 while ((elem = nvlist_next_nvpair(userprops, elem)) != NULL) { 4176 /* 4177 * See if we've already found this property in our list. 4178 */ 4179 for (last = start; *last != NULL; 4180 last = &(*last)->pl_next) { 4181 if (strcmp((*last)->pl_user_prop, 4182 nvpair_name(elem)) == 0) 4183 break; 4184 } 4185 4186 if (*last == NULL) { 4187 if ((entry = zfs_alloc(hdl, 4188 sizeof (zprop_list_t))) == NULL || 4189 ((entry->pl_user_prop = zfs_strdup(hdl, 4190 nvpair_name(elem)))) == NULL) { 4191 free(entry); 4192 return (-1); 4193 } 4194 4195 entry->pl_prop = ZPROP_INVAL; 4196 entry->pl_width = strlen(nvpair_name(elem)); 4197 entry->pl_all = B_TRUE; 4198 *last = entry; 4199 } 4200 } 4201 } 4202 4203 /* 4204 * Now go through and check the width of any non-fixed columns 4205 */ 4206 for (entry = *plp; entry != NULL; entry = entry->pl_next) { 4207 if (entry->pl_fixed && !literal) 4208 continue; 4209 4210 if (entry->pl_prop != ZPROP_INVAL) { 4211 if (zfs_prop_get(zhp, entry->pl_prop, 4212 buf, sizeof (buf), NULL, NULL, 0, literal) == 0) { 4213 if (strlen(buf) > entry->pl_width) 4214 entry->pl_width = strlen(buf); 4215 } 4216 if (received && zfs_prop_get_recvd(zhp, 4217 zfs_prop_to_name(entry->pl_prop), 4218 buf, sizeof (buf), literal) == 0) 4219 if (strlen(buf) > entry->pl_recvd_width) 4220 entry->pl_recvd_width = strlen(buf); 4221 } else { 4222 if (nvlist_lookup_nvlist(userprops, entry->pl_user_prop, 4223 &propval) == 0) { 4224 verify(nvlist_lookup_string(propval, 4225 ZPROP_VALUE, &strval) == 0); 4226 if (strlen(strval) > entry->pl_width) 4227 entry->pl_width = strlen(strval); 4228 } 4229 if (received && zfs_prop_get_recvd(zhp, 4230 entry->pl_user_prop, 4231 buf, sizeof (buf), literal) == 0) 4232 if (strlen(buf) > entry->pl_recvd_width) 4233 entry->pl_recvd_width = strlen(buf); 4234 } 4235 } 4236 4237 return (0); 4238} 4239 4240int 4241zfs_deleg_share_nfs(libzfs_handle_t *hdl, char *dataset, char *path, 4242 char *resource, void *export, void *sharetab, 4243 int sharemax, zfs_share_op_t operation) 4244{ 4245 zfs_cmd_t zc = { 0 }; 4246 int error; 4247 4248 (void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name)); 4249 (void) strlcpy(zc.zc_value, path, sizeof (zc.zc_value)); 4250 if (resource) 4251 (void) strlcpy(zc.zc_string, resource, sizeof (zc.zc_string)); 4252 zc.zc_share.z_sharedata = (uint64_t)(uintptr_t)sharetab; 4253 zc.zc_share.z_exportdata = (uint64_t)(uintptr_t)export; 4254 zc.zc_share.z_sharetype = operation; 4255 zc.zc_share.z_sharemax = sharemax; 4256 error = ioctl(hdl->libzfs_fd, ZFS_IOC_SHARE, &zc); 4257 return (error); 4258} 4259 4260void 4261zfs_prune_proplist(zfs_handle_t *zhp, uint8_t *props) 4262{ 4263 nvpair_t *curr; 4264 4265 /* 4266 * Keep a reference to the props-table against which we prune the 4267 * properties. 4268 */ 4269 zhp->zfs_props_table = props; 4270 4271 curr = nvlist_next_nvpair(zhp->zfs_props, NULL); 4272 4273 while (curr) { 4274 zfs_prop_t zfs_prop = zfs_name_to_prop(nvpair_name(curr)); 4275 nvpair_t *next = nvlist_next_nvpair(zhp->zfs_props, curr); 4276 4277 /* 4278 * User properties will result in ZPROP_INVAL, and since we 4279 * only know how to prune standard ZFS properties, we always 4280 * leave these in the list. This can also happen if we 4281 * encounter an unknown DSL property (when running older 4282 * software, for example). 4283 */ 4284 if (zfs_prop != ZPROP_INVAL && props[zfs_prop] == B_FALSE) 4285 (void) nvlist_remove(zhp->zfs_props, 4286 nvpair_name(curr), nvpair_type(curr)); 4287 curr = next; 4288 } 4289} 4290 4291#ifdef illumos 4292static int 4293zfs_smb_acl_mgmt(libzfs_handle_t *hdl, char *dataset, char *path, 4294 zfs_smb_acl_op_t cmd, char *resource1, char *resource2) 4295{ 4296 zfs_cmd_t zc = { 0 }; 4297 nvlist_t *nvlist = NULL; 4298 int error; 4299 4300 (void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name)); 4301 (void) strlcpy(zc.zc_value, path, sizeof (zc.zc_value)); 4302 zc.zc_cookie = (uint64_t)cmd; 4303 4304 if (cmd == ZFS_SMB_ACL_RENAME) { 4305 if (nvlist_alloc(&nvlist, NV_UNIQUE_NAME, 0) != 0) { 4306 (void) no_memory(hdl); 4307 return (0); 4308 } 4309 } 4310 4311 switch (cmd) { 4312 case ZFS_SMB_ACL_ADD: 4313 case ZFS_SMB_ACL_REMOVE: 4314 (void) strlcpy(zc.zc_string, resource1, sizeof (zc.zc_string)); 4315 break; 4316 case ZFS_SMB_ACL_RENAME: 4317 if (nvlist_add_string(nvlist, ZFS_SMB_ACL_SRC, 4318 resource1) != 0) { 4319 (void) no_memory(hdl); 4320 return (-1); 4321 } 4322 if (nvlist_add_string(nvlist, ZFS_SMB_ACL_TARGET, 4323 resource2) != 0) { 4324 (void) no_memory(hdl); 4325 return (-1); 4326 } 4327 if (zcmd_write_src_nvlist(hdl, &zc, nvlist) != 0) { 4328 nvlist_free(nvlist); 4329 return (-1); 4330 } 4331 break; 4332 case ZFS_SMB_ACL_PURGE: 4333 break; 4334 default: 4335 return (-1); 4336 } 4337 error = ioctl(hdl->libzfs_fd, ZFS_IOC_SMB_ACL, &zc); 4338 nvlist_free(nvlist); 4339 return (error); 4340} 4341 4342int 4343zfs_smb_acl_add(libzfs_handle_t *hdl, char *dataset, 4344 char *path, char *resource) 4345{ 4346 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_ADD, 4347 resource, NULL)); 4348} 4349 4350int 4351zfs_smb_acl_remove(libzfs_handle_t *hdl, char *dataset, 4352 char *path, char *resource) 4353{ 4354 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_REMOVE, 4355 resource, NULL)); 4356} 4357 4358int 4359zfs_smb_acl_purge(libzfs_handle_t *hdl, char *dataset, char *path) 4360{ 4361 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_PURGE, 4362 NULL, NULL)); 4363} 4364 4365int 4366zfs_smb_acl_rename(libzfs_handle_t *hdl, char *dataset, char *path, 4367 char *oldname, char *newname) 4368{ 4369 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_RENAME, 4370 oldname, newname)); 4371} 4372#endif /* illumos */ 4373 4374int 4375zfs_userspace(zfs_handle_t *zhp, zfs_userquota_prop_t type, 4376 zfs_userspace_cb_t func, void *arg) 4377{ 4378 zfs_cmd_t zc = { 0 }; 4379 zfs_useracct_t buf[100]; 4380 libzfs_handle_t *hdl = zhp->zfs_hdl; 4381 int ret; 4382 4383 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 4384 4385 zc.zc_objset_type = type; 4386 zc.zc_nvlist_dst = (uintptr_t)buf; 4387 4388 for (;;) { 4389 zfs_useracct_t *zua = buf; 4390 4391 zc.zc_nvlist_dst_size = sizeof (buf); 4392 if (zfs_ioctl(hdl, ZFS_IOC_USERSPACE_MANY, &zc) != 0) { 4393 char errbuf[1024]; 4394 4395 (void) snprintf(errbuf, sizeof (errbuf), 4396 dgettext(TEXT_DOMAIN, 4397 "cannot get used/quota for %s"), zc.zc_name); 4398 return (zfs_standard_error_fmt(hdl, errno, errbuf)); 4399 } 4400 if (zc.zc_nvlist_dst_size == 0) 4401 break; 4402 4403 while (zc.zc_nvlist_dst_size > 0) { 4404 if ((ret = func(arg, zua->zu_domain, zua->zu_rid, 4405 zua->zu_space)) != 0) 4406 return (ret); 4407 zua++; 4408 zc.zc_nvlist_dst_size -= sizeof (zfs_useracct_t); 4409 } 4410 } 4411 4412 return (0); 4413} 4414 4415struct holdarg { 4416 nvlist_t *nvl; 4417 const char *snapname; 4418 const char *tag; 4419 boolean_t recursive; 4420 int error; 4421}; 4422 4423static int 4424zfs_hold_one(zfs_handle_t *zhp, void *arg) 4425{ 4426 struct holdarg *ha = arg; 4427 char name[ZFS_MAX_DATASET_NAME_LEN]; 4428 int rv = 0; 4429 4430 (void) snprintf(name, sizeof (name), 4431 "%s@%s", zhp->zfs_name, ha->snapname); 4432 4433 if (lzc_exists(name)) 4434 fnvlist_add_string(ha->nvl, name, ha->tag); 4435 4436 if (ha->recursive) 4437 rv = zfs_iter_filesystems(zhp, zfs_hold_one, ha); 4438 zfs_close(zhp); 4439 return (rv); 4440} 4441 4442int 4443zfs_hold(zfs_handle_t *zhp, const char *snapname, const char *tag, 4444 boolean_t recursive, int cleanup_fd) 4445{ 4446 int ret; 4447 struct holdarg ha; 4448 4449 ha.nvl = fnvlist_alloc(); 4450 ha.snapname = snapname; 4451 ha.tag = tag; 4452 ha.recursive = recursive; 4453 (void) zfs_hold_one(zfs_handle_dup(zhp), &ha); 4454 4455 if (nvlist_empty(ha.nvl)) { 4456 char errbuf[1024]; 4457 4458 fnvlist_free(ha.nvl); 4459 ret = ENOENT; 4460 (void) snprintf(errbuf, sizeof (errbuf), 4461 dgettext(TEXT_DOMAIN, 4462 "cannot hold snapshot '%s@%s'"), 4463 zhp->zfs_name, snapname); 4464 (void) zfs_standard_error(zhp->zfs_hdl, ret, errbuf); 4465 return (ret); 4466 } 4467 4468 ret = zfs_hold_nvl(zhp, cleanup_fd, ha.nvl); 4469 fnvlist_free(ha.nvl); 4470 4471 return (ret); 4472} 4473 4474int 4475zfs_hold_nvl(zfs_handle_t *zhp, int cleanup_fd, nvlist_t *holds) 4476{ 4477 int ret; 4478 nvlist_t *errors; 4479 libzfs_handle_t *hdl = zhp->zfs_hdl; 4480 char errbuf[1024]; 4481 nvpair_t *elem; 4482 4483 errors = NULL; 4484 ret = lzc_hold(holds, cleanup_fd, &errors); 4485 4486 if (ret == 0) { 4487 /* There may be errors even in the success case. */ 4488 fnvlist_free(errors); 4489 return (0); 4490 } 4491 4492 if (nvlist_empty(errors)) { 4493 /* no hold-specific errors */ 4494 (void) snprintf(errbuf, sizeof (errbuf), 4495 dgettext(TEXT_DOMAIN, "cannot hold")); 4496 switch (ret) { 4497 case ENOTSUP: 4498 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4499 "pool must be upgraded")); 4500 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf); 4501 break; 4502 case EINVAL: 4503 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf); 4504 break; 4505 default: 4506 (void) zfs_standard_error(hdl, ret, errbuf); 4507 } 4508 } 4509 4510 for (elem = nvlist_next_nvpair(errors, NULL); 4511 elem != NULL; 4512 elem = nvlist_next_nvpair(errors, elem)) { 4513 (void) snprintf(errbuf, sizeof (errbuf), 4514 dgettext(TEXT_DOMAIN, 4515 "cannot hold snapshot '%s'"), nvpair_name(elem)); 4516 switch (fnvpair_value_int32(elem)) { 4517 case E2BIG: 4518 /* 4519 * Temporary tags wind up having the ds object id 4520 * prepended. So even if we passed the length check 4521 * above, it's still possible for the tag to wind 4522 * up being slightly too long. 4523 */ 4524 (void) zfs_error(hdl, EZFS_TAGTOOLONG, errbuf); 4525 break; 4526 case EINVAL: 4527 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf); 4528 break; 4529 case EEXIST: 4530 (void) zfs_error(hdl, EZFS_REFTAG_HOLD, errbuf); 4531 break; 4532 default: 4533 (void) zfs_standard_error(hdl, 4534 fnvpair_value_int32(elem), errbuf); 4535 } 4536 } 4537 4538 fnvlist_free(errors); 4539 return (ret); 4540} 4541 4542static int 4543zfs_release_one(zfs_handle_t *zhp, void *arg) 4544{ 4545 struct holdarg *ha = arg; 4546 char name[ZFS_MAX_DATASET_NAME_LEN]; 4547 int rv = 0; 4548 nvlist_t *existing_holds; 4549 4550 (void) snprintf(name, sizeof (name), 4551 "%s@%s", zhp->zfs_name, ha->snapname); 4552 4553 if (lzc_get_holds(name, &existing_holds) != 0) { 4554 ha->error = ENOENT; 4555 } else if (!nvlist_exists(existing_holds, ha->tag)) { 4556 ha->error = ESRCH; 4557 } else { 4558 nvlist_t *torelease = fnvlist_alloc(); 4559 fnvlist_add_boolean(torelease, ha->tag); 4560 fnvlist_add_nvlist(ha->nvl, name, torelease); 4561 fnvlist_free(torelease); 4562 } 4563 4564 if (ha->recursive) 4565 rv = zfs_iter_filesystems(zhp, zfs_release_one, ha); 4566 zfs_close(zhp); 4567 return (rv); 4568} 4569 4570int 4571zfs_release(zfs_handle_t *zhp, const char *snapname, const char *tag, 4572 boolean_t recursive) 4573{ 4574 int ret; 4575 struct holdarg ha; 4576 nvlist_t *errors = NULL; 4577 nvpair_t *elem; 4578 libzfs_handle_t *hdl = zhp->zfs_hdl; 4579 char errbuf[1024]; 4580 4581 ha.nvl = fnvlist_alloc(); 4582 ha.snapname = snapname; 4583 ha.tag = tag; 4584 ha.recursive = recursive; 4585 ha.error = 0; 4586 (void) zfs_release_one(zfs_handle_dup(zhp), &ha); 4587 4588 if (nvlist_empty(ha.nvl)) { 4589 fnvlist_free(ha.nvl); 4590 ret = ha.error; 4591 (void) snprintf(errbuf, sizeof (errbuf), 4592 dgettext(TEXT_DOMAIN, 4593 "cannot release hold from snapshot '%s@%s'"), 4594 zhp->zfs_name, snapname); 4595 if (ret == ESRCH) { 4596 (void) zfs_error(hdl, EZFS_REFTAG_RELE, errbuf); 4597 } else { 4598 (void) zfs_standard_error(hdl, ret, errbuf); 4599 } 4600 return (ret); 4601 } 4602 4603 ret = lzc_release(ha.nvl, &errors); 4604 fnvlist_free(ha.nvl); 4605 4606 if (ret == 0) { 4607 /* There may be errors even in the success case. */ 4608 fnvlist_free(errors); 4609 return (0); 4610 } 4611 4612 if (nvlist_empty(errors)) { 4613 /* no hold-specific errors */ 4614 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 4615 "cannot release")); 4616 switch (errno) { 4617 case ENOTSUP: 4618 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4619 "pool must be upgraded")); 4620 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf); 4621 break; 4622 default: 4623 (void) zfs_standard_error_fmt(hdl, errno, errbuf); 4624 } 4625 } 4626 4627 for (elem = nvlist_next_nvpair(errors, NULL); 4628 elem != NULL; 4629 elem = nvlist_next_nvpair(errors, elem)) { 4630 (void) snprintf(errbuf, sizeof (errbuf), 4631 dgettext(TEXT_DOMAIN, 4632 "cannot release hold from snapshot '%s'"), 4633 nvpair_name(elem)); 4634 switch (fnvpair_value_int32(elem)) { 4635 case ESRCH: 4636 (void) zfs_error(hdl, EZFS_REFTAG_RELE, errbuf); 4637 break; 4638 case EINVAL: 4639 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf); 4640 break; 4641 default: 4642 (void) zfs_standard_error_fmt(hdl, 4643 fnvpair_value_int32(elem), errbuf); 4644 } 4645 } 4646 4647 fnvlist_free(errors); 4648 return (ret); 4649} 4650 4651int 4652zfs_get_fsacl(zfs_handle_t *zhp, nvlist_t **nvl) 4653{ 4654 zfs_cmd_t zc = { 0 }; 4655 libzfs_handle_t *hdl = zhp->zfs_hdl; 4656 int nvsz = 2048; 4657 void *nvbuf; 4658 int err = 0; 4659 char errbuf[1024]; 4660 4661 assert(zhp->zfs_type == ZFS_TYPE_VOLUME || 4662 zhp->zfs_type == ZFS_TYPE_FILESYSTEM); 4663 4664tryagain: 4665 4666 nvbuf = malloc(nvsz); 4667 if (nvbuf == NULL) { 4668 err = (zfs_error(hdl, EZFS_NOMEM, strerror(errno))); 4669 goto out; 4670 } 4671 4672 zc.zc_nvlist_dst_size = nvsz; 4673 zc.zc_nvlist_dst = (uintptr_t)nvbuf; 4674 4675 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 4676 4677 if (ioctl(hdl->libzfs_fd, ZFS_IOC_GET_FSACL, &zc) != 0) { 4678 (void) snprintf(errbuf, sizeof (errbuf), 4679 dgettext(TEXT_DOMAIN, "cannot get permissions on '%s'"), 4680 zc.zc_name); 4681 switch (errno) { 4682 case ENOMEM: 4683 free(nvbuf); 4684 nvsz = zc.zc_nvlist_dst_size; 4685 goto tryagain; 4686 4687 case ENOTSUP: 4688 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4689 "pool must be upgraded")); 4690 err = zfs_error(hdl, EZFS_BADVERSION, errbuf); 4691 break; 4692 case EINVAL: 4693 err = zfs_error(hdl, EZFS_BADTYPE, errbuf); 4694 break; 4695 case ENOENT: 4696 err = zfs_error(hdl, EZFS_NOENT, errbuf); 4697 break; 4698 default: 4699 err = zfs_standard_error_fmt(hdl, errno, errbuf); 4700 break; 4701 } 4702 } else { 4703 /* success */ 4704 int rc = nvlist_unpack(nvbuf, zc.zc_nvlist_dst_size, nvl, 0); 4705 if (rc) { 4706 (void) snprintf(errbuf, sizeof (errbuf), dgettext( 4707 TEXT_DOMAIN, "cannot get permissions on '%s'"), 4708 zc.zc_name); 4709 err = zfs_standard_error_fmt(hdl, rc, errbuf); 4710 } 4711 } 4712 4713 free(nvbuf); 4714out: 4715 return (err); 4716} 4717 4718int 4719zfs_set_fsacl(zfs_handle_t *zhp, boolean_t un, nvlist_t *nvl) 4720{ 4721 zfs_cmd_t zc = { 0 }; 4722 libzfs_handle_t *hdl = zhp->zfs_hdl; 4723 char *nvbuf; 4724 char errbuf[1024]; 4725 size_t nvsz; 4726 int err; 4727 4728 assert(zhp->zfs_type == ZFS_TYPE_VOLUME || 4729 zhp->zfs_type == ZFS_TYPE_FILESYSTEM); 4730 4731 err = nvlist_size(nvl, &nvsz, NV_ENCODE_NATIVE); 4732 assert(err == 0); 4733 4734 nvbuf = malloc(nvsz); 4735 4736 err = nvlist_pack(nvl, &nvbuf, &nvsz, NV_ENCODE_NATIVE, 0); 4737 assert(err == 0); 4738 4739 zc.zc_nvlist_src_size = nvsz; 4740 zc.zc_nvlist_src = (uintptr_t)nvbuf; 4741 zc.zc_perm_action = un; 4742 4743 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 4744 4745 if (zfs_ioctl(hdl, ZFS_IOC_SET_FSACL, &zc) != 0) { 4746 (void) snprintf(errbuf, sizeof (errbuf), 4747 dgettext(TEXT_DOMAIN, "cannot set permissions on '%s'"), 4748 zc.zc_name); 4749 switch (errno) { 4750 case ENOTSUP: 4751 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4752 "pool must be upgraded")); 4753 err = zfs_error(hdl, EZFS_BADVERSION, errbuf); 4754 break; 4755 case EINVAL: 4756 err = zfs_error(hdl, EZFS_BADTYPE, errbuf); 4757 break; 4758 case ENOENT: 4759 err = zfs_error(hdl, EZFS_NOENT, errbuf); 4760 break; 4761 default: 4762 err = zfs_standard_error_fmt(hdl, errno, errbuf); 4763 break; 4764 } 4765 } 4766 4767 free(nvbuf); 4768 4769 return (err); 4770} 4771 4772int 4773zfs_get_holds(zfs_handle_t *zhp, nvlist_t **nvl) 4774{ 4775 int err; 4776 char errbuf[1024]; 4777 4778 err = lzc_get_holds(zhp->zfs_name, nvl); 4779 4780 if (err != 0) { 4781 libzfs_handle_t *hdl = zhp->zfs_hdl; 4782 4783 (void) snprintf(errbuf, sizeof (errbuf), 4784 dgettext(TEXT_DOMAIN, "cannot get holds for '%s'"), 4785 zhp->zfs_name); 4786 switch (err) { 4787 case ENOTSUP: 4788 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4789 "pool must be upgraded")); 4790 err = zfs_error(hdl, EZFS_BADVERSION, errbuf); 4791 break; 4792 case EINVAL: 4793 err = zfs_error(hdl, EZFS_BADTYPE, errbuf); 4794 break; 4795 case ENOENT: 4796 err = zfs_error(hdl, EZFS_NOENT, errbuf); 4797 break; 4798 default: 4799 err = zfs_standard_error_fmt(hdl, errno, errbuf); 4800 break; 4801 } 4802 } 4803 4804 return (err); 4805} 4806 4807/* 4808 * Convert the zvol's volume size to an appropriate reservation. 4809 * Note: If this routine is updated, it is necessary to update the ZFS test 4810 * suite's shell version in reservation.kshlib. 4811 */ 4812uint64_t 4813zvol_volsize_to_reservation(uint64_t volsize, nvlist_t *props) 4814{ 4815 uint64_t numdb; 4816 uint64_t nblocks, volblocksize; 4817 int ncopies; 4818 char *strval; 4819 4820 if (nvlist_lookup_string(props, 4821 zfs_prop_to_name(ZFS_PROP_COPIES), &strval) == 0) 4822 ncopies = atoi(strval); 4823 else 4824 ncopies = 1; 4825 if (nvlist_lookup_uint64(props, 4826 zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE), 4827 &volblocksize) != 0) 4828 volblocksize = ZVOL_DEFAULT_BLOCKSIZE; 4829 nblocks = volsize/volblocksize; 4830 /* start with metadnode L0-L6 */ 4831 numdb = 7; 4832 /* calculate number of indirects */ 4833 while (nblocks > 1) { 4834 nblocks += DNODES_PER_LEVEL - 1; 4835 nblocks /= DNODES_PER_LEVEL; 4836 numdb += nblocks; 4837 } 4838 numdb *= MIN(SPA_DVAS_PER_BP, ncopies + 1); 4839 volsize *= ncopies; 4840 /* 4841 * this is exactly DN_MAX_INDBLKSHIFT when metadata isn't 4842 * compressed, but in practice they compress down to about 4843 * 1100 bytes 4844 */ 4845 numdb *= 1ULL << DN_MAX_INDBLKSHIFT; 4846 volsize += numdb; 4847 return (volsize); 4848} 4849 4850/* 4851 * Attach/detach the given filesystem to/from the given jail. 4852 */ 4853int 4854zfs_jail(zfs_handle_t *zhp, int jailid, int attach) 4855{ 4856 libzfs_handle_t *hdl = zhp->zfs_hdl; 4857 zfs_cmd_t zc = { 0 }; 4858 char errbuf[1024]; 4859 unsigned long cmd; 4860 int ret; 4861 4862 if (attach) { 4863 (void) snprintf(errbuf, sizeof (errbuf), 4864 dgettext(TEXT_DOMAIN, "cannot jail '%s'"), zhp->zfs_name); 4865 } else { 4866 (void) snprintf(errbuf, sizeof (errbuf), 4867 dgettext(TEXT_DOMAIN, "cannot unjail '%s'"), zhp->zfs_name); 4868 } 4869 4870 switch (zhp->zfs_type) { 4871 case ZFS_TYPE_VOLUME: 4872 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4873 "volumes can not be jailed")); 4874 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 4875 case ZFS_TYPE_SNAPSHOT: 4876 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4877 "snapshots can not be jailed")); 4878 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 4879 } 4880 assert(zhp->zfs_type == ZFS_TYPE_FILESYSTEM); 4881 4882 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 4883 zc.zc_objset_type = DMU_OST_ZFS; 4884 zc.zc_jailid = jailid; 4885 4886 cmd = attach ? ZFS_IOC_JAIL : ZFS_IOC_UNJAIL; 4887 if ((ret = ioctl(hdl->libzfs_fd, cmd, &zc)) != 0) 4888 zfs_standard_error(hdl, errno, errbuf); 4889 4890 return (ret); 4891} 4892