libzfs_dataset.c revision 325140
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, 2016 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 return (-1); 2072 } 2073 break; 2074 2075 case PROP_TYPE_STRING: 2076 default: 2077 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN, 2078 "cannot get non-numeric property")); 2079 return (zfs_error(zhp->zfs_hdl, EZFS_BADPROP, 2080 dgettext(TEXT_DOMAIN, "internal error"))); 2081 } 2082 } 2083 2084 return (0); 2085} 2086 2087/* 2088 * Calculate the source type, given the raw source string. 2089 */ 2090static void 2091get_source(zfs_handle_t *zhp, zprop_source_t *srctype, char *source, 2092 char *statbuf, size_t statlen) 2093{ 2094 if (statbuf == NULL || *srctype == ZPROP_SRC_TEMPORARY) 2095 return; 2096 2097 if (source == NULL) { 2098 *srctype = ZPROP_SRC_NONE; 2099 } else if (source[0] == '\0') { 2100 *srctype = ZPROP_SRC_DEFAULT; 2101 } else if (strstr(source, ZPROP_SOURCE_VAL_RECVD) != NULL) { 2102 *srctype = ZPROP_SRC_RECEIVED; 2103 } else { 2104 if (strcmp(source, zhp->zfs_name) == 0) { 2105 *srctype = ZPROP_SRC_LOCAL; 2106 } else { 2107 (void) strlcpy(statbuf, source, statlen); 2108 *srctype = ZPROP_SRC_INHERITED; 2109 } 2110 } 2111 2112} 2113 2114int 2115zfs_prop_get_recvd(zfs_handle_t *zhp, const char *propname, char *propbuf, 2116 size_t proplen, boolean_t literal) 2117{ 2118 zfs_prop_t prop; 2119 int err = 0; 2120 2121 if (zhp->zfs_recvd_props == NULL) 2122 if (get_recvd_props_ioctl(zhp) != 0) 2123 return (-1); 2124 2125 prop = zfs_name_to_prop(propname); 2126 2127 if (prop != ZPROP_INVAL) { 2128 uint64_t cookie; 2129 if (!nvlist_exists(zhp->zfs_recvd_props, propname)) 2130 return (-1); 2131 zfs_set_recvd_props_mode(zhp, &cookie); 2132 err = zfs_prop_get(zhp, prop, propbuf, proplen, 2133 NULL, NULL, 0, literal); 2134 zfs_unset_recvd_props_mode(zhp, &cookie); 2135 } else { 2136 nvlist_t *propval; 2137 char *recvdval; 2138 if (nvlist_lookup_nvlist(zhp->zfs_recvd_props, 2139 propname, &propval) != 0) 2140 return (-1); 2141 verify(nvlist_lookup_string(propval, ZPROP_VALUE, 2142 &recvdval) == 0); 2143 (void) strlcpy(propbuf, recvdval, proplen); 2144 } 2145 2146 return (err == 0 ? 0 : -1); 2147} 2148 2149static int 2150get_clones_string(zfs_handle_t *zhp, char *propbuf, size_t proplen) 2151{ 2152 nvlist_t *value; 2153 nvpair_t *pair; 2154 2155 value = zfs_get_clones_nvl(zhp); 2156 if (value == NULL) 2157 return (-1); 2158 2159 propbuf[0] = '\0'; 2160 for (pair = nvlist_next_nvpair(value, NULL); pair != NULL; 2161 pair = nvlist_next_nvpair(value, pair)) { 2162 if (propbuf[0] != '\0') 2163 (void) strlcat(propbuf, ",", proplen); 2164 (void) strlcat(propbuf, nvpair_name(pair), proplen); 2165 } 2166 2167 return (0); 2168} 2169 2170struct get_clones_arg { 2171 uint64_t numclones; 2172 nvlist_t *value; 2173 const char *origin; 2174 char buf[ZFS_MAX_DATASET_NAME_LEN]; 2175}; 2176 2177int 2178get_clones_cb(zfs_handle_t *zhp, void *arg) 2179{ 2180 struct get_clones_arg *gca = arg; 2181 2182 if (gca->numclones == 0) { 2183 zfs_close(zhp); 2184 return (0); 2185 } 2186 2187 if (zfs_prop_get(zhp, ZFS_PROP_ORIGIN, gca->buf, sizeof (gca->buf), 2188 NULL, NULL, 0, B_TRUE) != 0) 2189 goto out; 2190 if (strcmp(gca->buf, gca->origin) == 0) { 2191 fnvlist_add_boolean(gca->value, zfs_get_name(zhp)); 2192 gca->numclones--; 2193 } 2194 2195out: 2196 (void) zfs_iter_children(zhp, get_clones_cb, gca); 2197 zfs_close(zhp); 2198 return (0); 2199} 2200 2201nvlist_t * 2202zfs_get_clones_nvl(zfs_handle_t *zhp) 2203{ 2204 nvlist_t *nv, *value; 2205 2206 if (nvlist_lookup_nvlist(zhp->zfs_props, 2207 zfs_prop_to_name(ZFS_PROP_CLONES), &nv) != 0) { 2208 struct get_clones_arg gca; 2209 2210 /* 2211 * if this is a snapshot, then the kernel wasn't able 2212 * to get the clones. Do it by slowly iterating. 2213 */ 2214 if (zhp->zfs_type != ZFS_TYPE_SNAPSHOT) 2215 return (NULL); 2216 if (nvlist_alloc(&nv, NV_UNIQUE_NAME, 0) != 0) 2217 return (NULL); 2218 if (nvlist_alloc(&value, NV_UNIQUE_NAME, 0) != 0) { 2219 nvlist_free(nv); 2220 return (NULL); 2221 } 2222 2223 gca.numclones = zfs_prop_get_int(zhp, ZFS_PROP_NUMCLONES); 2224 gca.value = value; 2225 gca.origin = zhp->zfs_name; 2226 2227 if (gca.numclones != 0) { 2228 zfs_handle_t *root; 2229 char pool[ZFS_MAX_DATASET_NAME_LEN]; 2230 char *cp = pool; 2231 2232 /* get the pool name */ 2233 (void) strlcpy(pool, zhp->zfs_name, sizeof (pool)); 2234 (void) strsep(&cp, "/@"); 2235 root = zfs_open(zhp->zfs_hdl, pool, 2236 ZFS_TYPE_FILESYSTEM); 2237 2238 (void) get_clones_cb(root, &gca); 2239 } 2240 2241 if (gca.numclones != 0 || 2242 nvlist_add_nvlist(nv, ZPROP_VALUE, value) != 0 || 2243 nvlist_add_nvlist(zhp->zfs_props, 2244 zfs_prop_to_name(ZFS_PROP_CLONES), nv) != 0) { 2245 nvlist_free(nv); 2246 nvlist_free(value); 2247 return (NULL); 2248 } 2249 nvlist_free(nv); 2250 nvlist_free(value); 2251 verify(0 == nvlist_lookup_nvlist(zhp->zfs_props, 2252 zfs_prop_to_name(ZFS_PROP_CLONES), &nv)); 2253 } 2254 2255 verify(nvlist_lookup_nvlist(nv, ZPROP_VALUE, &value) == 0); 2256 2257 return (value); 2258} 2259 2260/* 2261 * Retrieve a property from the given object. If 'literal' is specified, then 2262 * numbers are left as exact values. Otherwise, numbers are converted to a 2263 * human-readable form. 2264 * 2265 * Returns 0 on success, or -1 on error. 2266 */ 2267int 2268zfs_prop_get(zfs_handle_t *zhp, zfs_prop_t prop, char *propbuf, size_t proplen, 2269 zprop_source_t *src, char *statbuf, size_t statlen, boolean_t literal) 2270{ 2271 char *source = NULL; 2272 uint64_t val; 2273 const char *str; 2274 const char *strval; 2275 boolean_t received = zfs_is_recvd_props_mode(zhp); 2276 2277 /* 2278 * Check to see if this property applies to our object 2279 */ 2280 if (!zfs_prop_valid_for_type(prop, zhp->zfs_type)) 2281 return (-1); 2282 2283 if (received && zfs_prop_readonly(prop)) 2284 return (-1); 2285 2286 if (src) 2287 *src = ZPROP_SRC_NONE; 2288 2289 switch (prop) { 2290 case ZFS_PROP_CREATION: 2291 /* 2292 * 'creation' is a time_t stored in the statistics. We convert 2293 * this into a string unless 'literal' is specified. 2294 */ 2295 { 2296 val = getprop_uint64(zhp, prop, &source); 2297 time_t time = (time_t)val; 2298 struct tm t; 2299 2300 if (literal || 2301 localtime_r(&time, &t) == NULL || 2302 strftime(propbuf, proplen, "%a %b %e %k:%M %Y", 2303 &t) == 0) 2304 (void) snprintf(propbuf, proplen, "%llu", val); 2305 } 2306 break; 2307 2308 case ZFS_PROP_MOUNTPOINT: 2309 /* 2310 * Getting the precise mountpoint can be tricky. 2311 * 2312 * - for 'none' or 'legacy', return those values. 2313 * - for inherited mountpoints, we want to take everything 2314 * after our ancestor and append it to the inherited value. 2315 * 2316 * If the pool has an alternate root, we want to prepend that 2317 * root to any values we return. 2318 */ 2319 2320 str = getprop_string(zhp, prop, &source); 2321 2322 if (str[0] == '/') { 2323 char buf[MAXPATHLEN]; 2324 char *root = buf; 2325 const char *relpath; 2326 2327 /* 2328 * If we inherit the mountpoint, even from a dataset 2329 * with a received value, the source will be the path of 2330 * the dataset we inherit from. If source is 2331 * ZPROP_SOURCE_VAL_RECVD, the received value is not 2332 * inherited. 2333 */ 2334 if (strcmp(source, ZPROP_SOURCE_VAL_RECVD) == 0) { 2335 relpath = ""; 2336 } else { 2337 relpath = zhp->zfs_name + strlen(source); 2338 if (relpath[0] == '/') 2339 relpath++; 2340 } 2341 2342 if ((zpool_get_prop(zhp->zpool_hdl, 2343 ZPOOL_PROP_ALTROOT, buf, MAXPATHLEN, NULL, 2344 B_FALSE)) || (strcmp(root, "-") == 0)) 2345 root[0] = '\0'; 2346 /* 2347 * Special case an alternate root of '/'. This will 2348 * avoid having multiple leading slashes in the 2349 * mountpoint path. 2350 */ 2351 if (strcmp(root, "/") == 0) 2352 root++; 2353 2354 /* 2355 * If the mountpoint is '/' then skip over this 2356 * if we are obtaining either an alternate root or 2357 * an inherited mountpoint. 2358 */ 2359 if (str[1] == '\0' && (root[0] != '\0' || 2360 relpath[0] != '\0')) 2361 str++; 2362 2363 if (relpath[0] == '\0') 2364 (void) snprintf(propbuf, proplen, "%s%s", 2365 root, str); 2366 else 2367 (void) snprintf(propbuf, proplen, "%s%s%s%s", 2368 root, str, relpath[0] == '@' ? "" : "/", 2369 relpath); 2370 } else { 2371 /* 'legacy' or 'none' */ 2372 (void) strlcpy(propbuf, str, proplen); 2373 } 2374 2375 break; 2376 2377 case ZFS_PROP_ORIGIN: 2378 str = getprop_string(zhp, prop, &source); 2379 if (str == NULL) 2380 return (-1); 2381 (void) strlcpy(propbuf, str, proplen); 2382 break; 2383 2384 case ZFS_PROP_CLONES: 2385 if (get_clones_string(zhp, propbuf, proplen) != 0) 2386 return (-1); 2387 break; 2388 2389 case ZFS_PROP_QUOTA: 2390 case ZFS_PROP_REFQUOTA: 2391 case ZFS_PROP_RESERVATION: 2392 case ZFS_PROP_REFRESERVATION: 2393 2394 if (get_numeric_property(zhp, prop, src, &source, &val) != 0) 2395 return (-1); 2396 2397 /* 2398 * If quota or reservation is 0, we translate this into 'none' 2399 * (unless literal is set), and indicate that it's the default 2400 * value. Otherwise, we print the number nicely and indicate 2401 * that its set locally. 2402 */ 2403 if (val == 0) { 2404 if (literal) 2405 (void) strlcpy(propbuf, "0", proplen); 2406 else 2407 (void) strlcpy(propbuf, "none", proplen); 2408 } else { 2409 if (literal) 2410 (void) snprintf(propbuf, proplen, "%llu", 2411 (u_longlong_t)val); 2412 else 2413 zfs_nicenum(val, propbuf, proplen); 2414 } 2415 break; 2416 2417 case ZFS_PROP_FILESYSTEM_LIMIT: 2418 case ZFS_PROP_SNAPSHOT_LIMIT: 2419 case ZFS_PROP_FILESYSTEM_COUNT: 2420 case ZFS_PROP_SNAPSHOT_COUNT: 2421 2422 if (get_numeric_property(zhp, prop, src, &source, &val) != 0) 2423 return (-1); 2424 2425 /* 2426 * If limit is UINT64_MAX, we translate this into 'none' (unless 2427 * literal is set), and indicate that it's the default value. 2428 * Otherwise, we print the number nicely and indicate that it's 2429 * set locally. 2430 */ 2431 if (literal) { 2432 (void) snprintf(propbuf, proplen, "%llu", 2433 (u_longlong_t)val); 2434 } else if (val == UINT64_MAX) { 2435 (void) strlcpy(propbuf, "none", proplen); 2436 } else { 2437 zfs_nicenum(val, propbuf, proplen); 2438 } 2439 break; 2440 2441 case ZFS_PROP_REFRATIO: 2442 case ZFS_PROP_COMPRESSRATIO: 2443 if (get_numeric_property(zhp, prop, src, &source, &val) != 0) 2444 return (-1); 2445 (void) snprintf(propbuf, proplen, "%llu.%02llux", 2446 (u_longlong_t)(val / 100), 2447 (u_longlong_t)(val % 100)); 2448 break; 2449 2450 case ZFS_PROP_TYPE: 2451 switch (zhp->zfs_type) { 2452 case ZFS_TYPE_FILESYSTEM: 2453 str = "filesystem"; 2454 break; 2455 case ZFS_TYPE_VOLUME: 2456 str = "volume"; 2457 break; 2458 case ZFS_TYPE_SNAPSHOT: 2459 str = "snapshot"; 2460 break; 2461 case ZFS_TYPE_BOOKMARK: 2462 str = "bookmark"; 2463 break; 2464 default: 2465 abort(); 2466 } 2467 (void) snprintf(propbuf, proplen, "%s", str); 2468 break; 2469 2470 case ZFS_PROP_MOUNTED: 2471 /* 2472 * The 'mounted' property is a pseudo-property that described 2473 * whether the filesystem is currently mounted. Even though 2474 * it's a boolean value, the typical values of "on" and "off" 2475 * don't make sense, so we translate to "yes" and "no". 2476 */ 2477 if (get_numeric_property(zhp, ZFS_PROP_MOUNTED, 2478 src, &source, &val) != 0) 2479 return (-1); 2480 if (val) 2481 (void) strlcpy(propbuf, "yes", proplen); 2482 else 2483 (void) strlcpy(propbuf, "no", proplen); 2484 break; 2485 2486 case ZFS_PROP_NAME: 2487 /* 2488 * The 'name' property is a pseudo-property derived from the 2489 * dataset name. It is presented as a real property to simplify 2490 * consumers. 2491 */ 2492 (void) strlcpy(propbuf, zhp->zfs_name, proplen); 2493 break; 2494 2495 case ZFS_PROP_MLSLABEL: 2496 { 2497#ifdef illumos 2498 m_label_t *new_sl = NULL; 2499 char *ascii = NULL; /* human readable label */ 2500 2501 (void) strlcpy(propbuf, 2502 getprop_string(zhp, prop, &source), proplen); 2503 2504 if (literal || (strcasecmp(propbuf, 2505 ZFS_MLSLABEL_DEFAULT) == 0)) 2506 break; 2507 2508 /* 2509 * Try to translate the internal hex string to 2510 * human-readable output. If there are any 2511 * problems just use the hex string. 2512 */ 2513 2514 if (str_to_label(propbuf, &new_sl, MAC_LABEL, 2515 L_NO_CORRECTION, NULL) == -1) { 2516 m_label_free(new_sl); 2517 break; 2518 } 2519 2520 if (label_to_str(new_sl, &ascii, M_LABEL, 2521 DEF_NAMES) != 0) { 2522 if (ascii) 2523 free(ascii); 2524 m_label_free(new_sl); 2525 break; 2526 } 2527 m_label_free(new_sl); 2528 2529 (void) strlcpy(propbuf, ascii, proplen); 2530 free(ascii); 2531#else /* !illumos */ 2532 propbuf[0] = '\0'; 2533#endif /* illumos */ 2534 } 2535 break; 2536 2537 case ZFS_PROP_GUID: 2538 /* 2539 * GUIDs are stored as numbers, but they are identifiers. 2540 * We don't want them to be pretty printed, because pretty 2541 * printing mangles the ID into a truncated and useless value. 2542 */ 2543 if (get_numeric_property(zhp, prop, src, &source, &val) != 0) 2544 return (-1); 2545 (void) snprintf(propbuf, proplen, "%llu", (u_longlong_t)val); 2546 break; 2547 2548 default: 2549 switch (zfs_prop_get_type(prop)) { 2550 case PROP_TYPE_NUMBER: 2551 if (get_numeric_property(zhp, prop, src, 2552 &source, &val) != 0) 2553 return (-1); 2554 if (literal) 2555 (void) snprintf(propbuf, proplen, "%llu", 2556 (u_longlong_t)val); 2557 else 2558 zfs_nicenum(val, propbuf, proplen); 2559 break; 2560 2561 case PROP_TYPE_STRING: 2562 str = getprop_string(zhp, prop, &source); 2563 if (str == NULL) 2564 return (-1); 2565 (void) strlcpy(propbuf, str, proplen); 2566 break; 2567 2568 case PROP_TYPE_INDEX: 2569 if (get_numeric_property(zhp, prop, src, 2570 &source, &val) != 0) 2571 return (-1); 2572 if (zfs_prop_index_to_string(prop, val, &strval) != 0) 2573 return (-1); 2574 (void) strlcpy(propbuf, strval, proplen); 2575 break; 2576 2577 default: 2578 abort(); 2579 } 2580 } 2581 2582 get_source(zhp, src, source, statbuf, statlen); 2583 2584 return (0); 2585} 2586 2587/* 2588 * Utility function to get the given numeric property. Does no validation that 2589 * the given property is the appropriate type; should only be used with 2590 * hard-coded property types. 2591 */ 2592uint64_t 2593zfs_prop_get_int(zfs_handle_t *zhp, zfs_prop_t prop) 2594{ 2595 char *source; 2596 uint64_t val; 2597 2598 (void) get_numeric_property(zhp, prop, NULL, &source, &val); 2599 2600 return (val); 2601} 2602 2603int 2604zfs_prop_set_int(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t val) 2605{ 2606 char buf[64]; 2607 2608 (void) snprintf(buf, sizeof (buf), "%llu", (longlong_t)val); 2609 return (zfs_prop_set(zhp, zfs_prop_to_name(prop), buf)); 2610} 2611 2612/* 2613 * Similar to zfs_prop_get(), but returns the value as an integer. 2614 */ 2615int 2616zfs_prop_get_numeric(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t *value, 2617 zprop_source_t *src, char *statbuf, size_t statlen) 2618{ 2619 char *source; 2620 2621 /* 2622 * Check to see if this property applies to our object 2623 */ 2624 if (!zfs_prop_valid_for_type(prop, zhp->zfs_type)) { 2625 return (zfs_error_fmt(zhp->zfs_hdl, EZFS_PROPTYPE, 2626 dgettext(TEXT_DOMAIN, "cannot get property '%s'"), 2627 zfs_prop_to_name(prop))); 2628 } 2629 2630 if (src) 2631 *src = ZPROP_SRC_NONE; 2632 2633 if (get_numeric_property(zhp, prop, src, &source, value) != 0) 2634 return (-1); 2635 2636 get_source(zhp, src, source, statbuf, statlen); 2637 2638 return (0); 2639} 2640 2641static int 2642idmap_id_to_numeric_domain_rid(uid_t id, boolean_t isuser, 2643 char **domainp, idmap_rid_t *ridp) 2644{ 2645#ifdef illumos 2646 idmap_get_handle_t *get_hdl = NULL; 2647 idmap_stat status; 2648 int err = EINVAL; 2649 2650 if (idmap_get_create(&get_hdl) != IDMAP_SUCCESS) 2651 goto out; 2652 2653 if (isuser) { 2654 err = idmap_get_sidbyuid(get_hdl, id, 2655 IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status); 2656 } else { 2657 err = idmap_get_sidbygid(get_hdl, id, 2658 IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status); 2659 } 2660 if (err == IDMAP_SUCCESS && 2661 idmap_get_mappings(get_hdl) == IDMAP_SUCCESS && 2662 status == IDMAP_SUCCESS) 2663 err = 0; 2664 else 2665 err = EINVAL; 2666out: 2667 if (get_hdl) 2668 idmap_get_destroy(get_hdl); 2669 return (err); 2670#else /* !illumos */ 2671 assert(!"invalid code path"); 2672 return (EINVAL); // silence compiler warning 2673#endif /* illumos */ 2674} 2675 2676/* 2677 * convert the propname into parameters needed by kernel 2678 * Eg: userquota@ahrens -> ZFS_PROP_USERQUOTA, "", 126829 2679 * Eg: userused@matt@domain -> ZFS_PROP_USERUSED, "S-1-123-456", 789 2680 */ 2681static int 2682userquota_propname_decode(const char *propname, boolean_t zoned, 2683 zfs_userquota_prop_t *typep, char *domain, int domainlen, uint64_t *ridp) 2684{ 2685 zfs_userquota_prop_t type; 2686 char *cp, *end; 2687 char *numericsid = NULL; 2688 boolean_t isuser; 2689 2690 domain[0] = '\0'; 2691 *ridp = 0; 2692 /* Figure out the property type ({user|group}{quota|space}) */ 2693 for (type = 0; type < ZFS_NUM_USERQUOTA_PROPS; type++) { 2694 if (strncmp(propname, zfs_userquota_prop_prefixes[type], 2695 strlen(zfs_userquota_prop_prefixes[type])) == 0) 2696 break; 2697 } 2698 if (type == ZFS_NUM_USERQUOTA_PROPS) 2699 return (EINVAL); 2700 *typep = type; 2701 2702 isuser = (type == ZFS_PROP_USERQUOTA || 2703 type == ZFS_PROP_USERUSED); 2704 2705 cp = strchr(propname, '@') + 1; 2706 2707 if (strchr(cp, '@')) { 2708#ifdef illumos 2709 /* 2710 * It's a SID name (eg "user@domain") that needs to be 2711 * turned into S-1-domainID-RID. 2712 */ 2713 int flag = 0; 2714 idmap_stat stat, map_stat; 2715 uid_t pid; 2716 idmap_rid_t rid; 2717 idmap_get_handle_t *gh = NULL; 2718 2719 stat = idmap_get_create(&gh); 2720 if (stat != IDMAP_SUCCESS) { 2721 idmap_get_destroy(gh); 2722 return (ENOMEM); 2723 } 2724 if (zoned && getzoneid() == GLOBAL_ZONEID) 2725 return (ENOENT); 2726 if (isuser) { 2727 stat = idmap_getuidbywinname(cp, NULL, flag, &pid); 2728 if (stat < 0) 2729 return (ENOENT); 2730 stat = idmap_get_sidbyuid(gh, pid, flag, &numericsid, 2731 &rid, &map_stat); 2732 } else { 2733 stat = idmap_getgidbywinname(cp, NULL, flag, &pid); 2734 if (stat < 0) 2735 return (ENOENT); 2736 stat = idmap_get_sidbygid(gh, pid, flag, &numericsid, 2737 &rid, &map_stat); 2738 } 2739 if (stat < 0) { 2740 idmap_get_destroy(gh); 2741 return (ENOENT); 2742 } 2743 stat = idmap_get_mappings(gh); 2744 idmap_get_destroy(gh); 2745 2746 if (stat < 0) { 2747 return (ENOENT); 2748 } 2749 if (numericsid == NULL) 2750 return (ENOENT); 2751 cp = numericsid; 2752 *ridp = rid; 2753 /* will be further decoded below */ 2754#else /* !illumos */ 2755 return (ENOENT); 2756#endif /* illumos */ 2757 } 2758 2759 if (strncmp(cp, "S-1-", 4) == 0) { 2760 /* It's a numeric SID (eg "S-1-234-567-89") */ 2761 (void) strlcpy(domain, cp, domainlen); 2762 errno = 0; 2763 if (*ridp == 0) { 2764 cp = strrchr(domain, '-'); 2765 *cp = '\0'; 2766 cp++; 2767 *ridp = strtoull(cp, &end, 10); 2768 } else { 2769 end = ""; 2770 } 2771 if (numericsid) { 2772 free(numericsid); 2773 numericsid = NULL; 2774 } 2775 if (errno != 0 || *end != '\0') 2776 return (EINVAL); 2777 } else if (!isdigit(*cp)) { 2778 /* 2779 * It's a user/group name (eg "user") that needs to be 2780 * turned into a uid/gid 2781 */ 2782 if (zoned && getzoneid() == GLOBAL_ZONEID) 2783 return (ENOENT); 2784 if (isuser) { 2785 struct passwd *pw; 2786 pw = getpwnam(cp); 2787 if (pw == NULL) 2788 return (ENOENT); 2789 *ridp = pw->pw_uid; 2790 } else { 2791 struct group *gr; 2792 gr = getgrnam(cp); 2793 if (gr == NULL) 2794 return (ENOENT); 2795 *ridp = gr->gr_gid; 2796 } 2797 } else { 2798 /* It's a user/group ID (eg "12345"). */ 2799 uid_t id = strtoul(cp, &end, 10); 2800 idmap_rid_t rid; 2801 char *mapdomain; 2802 2803 if (*end != '\0') 2804 return (EINVAL); 2805 if (id > MAXUID) { 2806 /* It's an ephemeral ID. */ 2807 if (idmap_id_to_numeric_domain_rid(id, isuser, 2808 &mapdomain, &rid) != 0) 2809 return (ENOENT); 2810 (void) strlcpy(domain, mapdomain, domainlen); 2811 *ridp = rid; 2812 } else { 2813 *ridp = id; 2814 } 2815 } 2816 2817 ASSERT3P(numericsid, ==, NULL); 2818 return (0); 2819} 2820 2821static int 2822zfs_prop_get_userquota_common(zfs_handle_t *zhp, const char *propname, 2823 uint64_t *propvalue, zfs_userquota_prop_t *typep) 2824{ 2825 int err; 2826 zfs_cmd_t zc = { 0 }; 2827 2828 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 2829 2830 err = userquota_propname_decode(propname, 2831 zfs_prop_get_int(zhp, ZFS_PROP_ZONED), 2832 typep, zc.zc_value, sizeof (zc.zc_value), &zc.zc_guid); 2833 zc.zc_objset_type = *typep; 2834 if (err) 2835 return (err); 2836 2837 err = ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_USERSPACE_ONE, &zc); 2838 if (err) 2839 return (err); 2840 2841 *propvalue = zc.zc_cookie; 2842 return (0); 2843} 2844 2845int 2846zfs_prop_get_userquota_int(zfs_handle_t *zhp, const char *propname, 2847 uint64_t *propvalue) 2848{ 2849 zfs_userquota_prop_t type; 2850 2851 return (zfs_prop_get_userquota_common(zhp, propname, propvalue, 2852 &type)); 2853} 2854 2855int 2856zfs_prop_get_userquota(zfs_handle_t *zhp, const char *propname, 2857 char *propbuf, int proplen, boolean_t literal) 2858{ 2859 int err; 2860 uint64_t propvalue; 2861 zfs_userquota_prop_t type; 2862 2863 err = zfs_prop_get_userquota_common(zhp, propname, &propvalue, 2864 &type); 2865 2866 if (err) 2867 return (err); 2868 2869 if (literal) { 2870 (void) snprintf(propbuf, proplen, "%llu", propvalue); 2871 } else if (propvalue == 0 && 2872 (type == ZFS_PROP_USERQUOTA || type == ZFS_PROP_GROUPQUOTA)) { 2873 (void) strlcpy(propbuf, "none", proplen); 2874 } else { 2875 zfs_nicenum(propvalue, propbuf, proplen); 2876 } 2877 return (0); 2878} 2879 2880int 2881zfs_prop_get_written_int(zfs_handle_t *zhp, const char *propname, 2882 uint64_t *propvalue) 2883{ 2884 int err; 2885 zfs_cmd_t zc = { 0 }; 2886 const char *snapname; 2887 2888 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 2889 2890 snapname = strchr(propname, '@') + 1; 2891 if (strchr(snapname, '@')) { 2892 (void) strlcpy(zc.zc_value, snapname, sizeof (zc.zc_value)); 2893 } else { 2894 /* snapname is the short name, append it to zhp's fsname */ 2895 char *cp; 2896 2897 (void) strlcpy(zc.zc_value, zhp->zfs_name, 2898 sizeof (zc.zc_value)); 2899 cp = strchr(zc.zc_value, '@'); 2900 if (cp != NULL) 2901 *cp = '\0'; 2902 (void) strlcat(zc.zc_value, "@", sizeof (zc.zc_value)); 2903 (void) strlcat(zc.zc_value, snapname, sizeof (zc.zc_value)); 2904 } 2905 2906 err = ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_SPACE_WRITTEN, &zc); 2907 if (err) 2908 return (err); 2909 2910 *propvalue = zc.zc_cookie; 2911 return (0); 2912} 2913 2914int 2915zfs_prop_get_written(zfs_handle_t *zhp, const char *propname, 2916 char *propbuf, int proplen, boolean_t literal) 2917{ 2918 int err; 2919 uint64_t propvalue; 2920 2921 err = zfs_prop_get_written_int(zhp, propname, &propvalue); 2922 2923 if (err) 2924 return (err); 2925 2926 if (literal) { 2927 (void) snprintf(propbuf, proplen, "%llu", propvalue); 2928 } else { 2929 zfs_nicenum(propvalue, propbuf, proplen); 2930 } 2931 return (0); 2932} 2933 2934/* 2935 * Returns the name of the given zfs handle. 2936 */ 2937const char * 2938zfs_get_name(const zfs_handle_t *zhp) 2939{ 2940 return (zhp->zfs_name); 2941} 2942 2943/* 2944 * Returns the name of the parent pool for the given zfs handle. 2945 */ 2946const char * 2947zfs_get_pool_name(const zfs_handle_t *zhp) 2948{ 2949 return (zhp->zpool_hdl->zpool_name); 2950} 2951 2952/* 2953 * Returns the type of the given zfs handle. 2954 */ 2955zfs_type_t 2956zfs_get_type(const zfs_handle_t *zhp) 2957{ 2958 return (zhp->zfs_type); 2959} 2960 2961/* 2962 * Is one dataset name a child dataset of another? 2963 * 2964 * Needs to handle these cases: 2965 * Dataset 1 "a/foo" "a/foo" "a/foo" "a/foo" 2966 * Dataset 2 "a/fo" "a/foobar" "a/bar/baz" "a/foo/bar" 2967 * Descendant? No. No. No. Yes. 2968 */ 2969static boolean_t 2970is_descendant(const char *ds1, const char *ds2) 2971{ 2972 size_t d1len = strlen(ds1); 2973 2974 /* ds2 can't be a descendant if it's smaller */ 2975 if (strlen(ds2) < d1len) 2976 return (B_FALSE); 2977 2978 /* otherwise, compare strings and verify that there's a '/' char */ 2979 return (ds2[d1len] == '/' && (strncmp(ds1, ds2, d1len) == 0)); 2980} 2981 2982/* 2983 * Given a complete name, return just the portion that refers to the parent. 2984 * Will return -1 if there is no parent (path is just the name of the 2985 * pool). 2986 */ 2987static int 2988parent_name(const char *path, char *buf, size_t buflen) 2989{ 2990 char *slashp; 2991 2992 (void) strlcpy(buf, path, buflen); 2993 2994 if ((slashp = strrchr(buf, '/')) == NULL) 2995 return (-1); 2996 *slashp = '\0'; 2997 2998 return (0); 2999} 3000 3001/* 3002 * If accept_ancestor is false, then check to make sure that the given path has 3003 * a parent, and that it exists. If accept_ancestor is true, then find the 3004 * closest existing ancestor for the given path. In prefixlen return the 3005 * length of already existing prefix of the given path. We also fetch the 3006 * 'zoned' property, which is used to validate property settings when creating 3007 * new datasets. 3008 */ 3009static int 3010check_parents(libzfs_handle_t *hdl, const char *path, uint64_t *zoned, 3011 boolean_t accept_ancestor, int *prefixlen) 3012{ 3013 zfs_cmd_t zc = { 0 }; 3014 char parent[ZFS_MAX_DATASET_NAME_LEN]; 3015 char *slash; 3016 zfs_handle_t *zhp; 3017 char errbuf[1024]; 3018 uint64_t is_zoned; 3019 3020 (void) snprintf(errbuf, sizeof (errbuf), 3021 dgettext(TEXT_DOMAIN, "cannot create '%s'"), path); 3022 3023 /* get parent, and check to see if this is just a pool */ 3024 if (parent_name(path, parent, sizeof (parent)) != 0) { 3025 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3026 "missing dataset name")); 3027 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3028 } 3029 3030 /* check to see if the pool exists */ 3031 if ((slash = strchr(parent, '/')) == NULL) 3032 slash = parent + strlen(parent); 3033 (void) strncpy(zc.zc_name, parent, slash - parent); 3034 zc.zc_name[slash - parent] = '\0'; 3035 if (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_STATS, &zc) != 0 && 3036 errno == ENOENT) { 3037 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3038 "no such pool '%s'"), zc.zc_name); 3039 return (zfs_error(hdl, EZFS_NOENT, errbuf)); 3040 } 3041 3042 /* check to see if the parent dataset exists */ 3043 while ((zhp = make_dataset_handle(hdl, parent)) == NULL) { 3044 if (errno == ENOENT && accept_ancestor) { 3045 /* 3046 * Go deeper to find an ancestor, give up on top level. 3047 */ 3048 if (parent_name(parent, parent, sizeof (parent)) != 0) { 3049 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3050 "no such pool '%s'"), zc.zc_name); 3051 return (zfs_error(hdl, EZFS_NOENT, errbuf)); 3052 } 3053 } else if (errno == ENOENT) { 3054 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3055 "parent does not exist")); 3056 return (zfs_error(hdl, EZFS_NOENT, errbuf)); 3057 } else 3058 return (zfs_standard_error(hdl, errno, errbuf)); 3059 } 3060 3061 is_zoned = zfs_prop_get_int(zhp, ZFS_PROP_ZONED); 3062 if (zoned != NULL) 3063 *zoned = is_zoned; 3064 3065 /* we are in a non-global zone, but parent is in the global zone */ 3066 if (getzoneid() != GLOBAL_ZONEID && !is_zoned) { 3067 (void) zfs_standard_error(hdl, EPERM, errbuf); 3068 zfs_close(zhp); 3069 return (-1); 3070 } 3071 3072 /* make sure parent is a filesystem */ 3073 if (zfs_get_type(zhp) != ZFS_TYPE_FILESYSTEM) { 3074 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3075 "parent is not a filesystem")); 3076 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf); 3077 zfs_close(zhp); 3078 return (-1); 3079 } 3080 3081 zfs_close(zhp); 3082 if (prefixlen != NULL) 3083 *prefixlen = strlen(parent); 3084 return (0); 3085} 3086 3087/* 3088 * Finds whether the dataset of the given type(s) exists. 3089 */ 3090boolean_t 3091zfs_dataset_exists(libzfs_handle_t *hdl, const char *path, zfs_type_t types) 3092{ 3093 zfs_handle_t *zhp; 3094 3095 if (!zfs_validate_name(hdl, path, types, B_FALSE)) 3096 return (B_FALSE); 3097 3098 /* 3099 * Try to get stats for the dataset, which will tell us if it exists. 3100 */ 3101 if ((zhp = make_dataset_handle(hdl, path)) != NULL) { 3102 int ds_type = zhp->zfs_type; 3103 3104 zfs_close(zhp); 3105 if (types & ds_type) 3106 return (B_TRUE); 3107 } 3108 return (B_FALSE); 3109} 3110 3111/* 3112 * Given a path to 'target', create all the ancestors between 3113 * the prefixlen portion of the path, and the target itself. 3114 * Fail if the initial prefixlen-ancestor does not already exist. 3115 */ 3116int 3117create_parents(libzfs_handle_t *hdl, char *target, int prefixlen) 3118{ 3119 zfs_handle_t *h; 3120 char *cp; 3121 const char *opname; 3122 3123 /* make sure prefix exists */ 3124 cp = target + prefixlen; 3125 if (*cp != '/') { 3126 assert(strchr(cp, '/') == NULL); 3127 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM); 3128 } else { 3129 *cp = '\0'; 3130 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM); 3131 *cp = '/'; 3132 } 3133 if (h == NULL) 3134 return (-1); 3135 zfs_close(h); 3136 3137 /* 3138 * Attempt to create, mount, and share any ancestor filesystems, 3139 * up to the prefixlen-long one. 3140 */ 3141 for (cp = target + prefixlen + 1; 3142 (cp = strchr(cp, '/')) != NULL; *cp = '/', cp++) { 3143 3144 *cp = '\0'; 3145 3146 h = make_dataset_handle(hdl, target); 3147 if (h) { 3148 /* it already exists, nothing to do here */ 3149 zfs_close(h); 3150 continue; 3151 } 3152 3153 if (zfs_create(hdl, target, ZFS_TYPE_FILESYSTEM, 3154 NULL) != 0) { 3155 opname = dgettext(TEXT_DOMAIN, "create"); 3156 goto ancestorerr; 3157 } 3158 3159 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM); 3160 if (h == NULL) { 3161 opname = dgettext(TEXT_DOMAIN, "open"); 3162 goto ancestorerr; 3163 } 3164 3165 if (zfs_mount(h, NULL, 0) != 0) { 3166 opname = dgettext(TEXT_DOMAIN, "mount"); 3167 goto ancestorerr; 3168 } 3169 3170 if (zfs_share(h) != 0) { 3171 opname = dgettext(TEXT_DOMAIN, "share"); 3172 goto ancestorerr; 3173 } 3174 3175 zfs_close(h); 3176 } 3177 3178 return (0); 3179 3180ancestorerr: 3181 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3182 "failed to %s ancestor '%s'"), opname, target); 3183 return (-1); 3184} 3185 3186/* 3187 * Creates non-existing ancestors of the given path. 3188 */ 3189int 3190zfs_create_ancestors(libzfs_handle_t *hdl, const char *path) 3191{ 3192 int prefix; 3193 char *path_copy; 3194 int rc = 0; 3195 3196 if (check_parents(hdl, path, NULL, B_TRUE, &prefix) != 0) 3197 return (-1); 3198 3199 if ((path_copy = strdup(path)) != NULL) { 3200 rc = create_parents(hdl, path_copy, prefix); 3201 free(path_copy); 3202 } 3203 if (path_copy == NULL || rc != 0) 3204 return (-1); 3205 3206 return (0); 3207} 3208 3209/* 3210 * Create a new filesystem or volume. 3211 */ 3212int 3213zfs_create(libzfs_handle_t *hdl, const char *path, zfs_type_t type, 3214 nvlist_t *props) 3215{ 3216 int ret; 3217 uint64_t size = 0; 3218 uint64_t blocksize = zfs_prop_default_numeric(ZFS_PROP_VOLBLOCKSIZE); 3219 char errbuf[1024]; 3220 uint64_t zoned; 3221 enum lzc_dataset_type ost; 3222 3223 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3224 "cannot create '%s'"), path); 3225 3226 /* validate the path, taking care to note the extended error message */ 3227 if (!zfs_validate_name(hdl, path, type, B_TRUE)) 3228 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3229 3230 /* validate parents exist */ 3231 if (check_parents(hdl, path, &zoned, B_FALSE, NULL) != 0) 3232 return (-1); 3233 3234 /* 3235 * The failure modes when creating a dataset of a different type over 3236 * one that already exists is a little strange. In particular, if you 3237 * try to create a dataset on top of an existing dataset, the ioctl() 3238 * will return ENOENT, not EEXIST. To prevent this from happening, we 3239 * first try to see if the dataset exists. 3240 */ 3241 if (zfs_dataset_exists(hdl, path, ZFS_TYPE_DATASET)) { 3242 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3243 "dataset already exists")); 3244 return (zfs_error(hdl, EZFS_EXISTS, errbuf)); 3245 } 3246 3247 if (type == ZFS_TYPE_VOLUME) 3248 ost = LZC_DATSET_TYPE_ZVOL; 3249 else 3250 ost = LZC_DATSET_TYPE_ZFS; 3251 3252 /* open zpool handle for prop validation */ 3253 char pool_path[ZFS_MAX_DATASET_NAME_LEN]; 3254 (void) strlcpy(pool_path, path, sizeof (pool_path)); 3255 3256 /* truncate pool_path at first slash */ 3257 char *p = strchr(pool_path, '/'); 3258 if (p != NULL) 3259 *p = '\0'; 3260 3261 zpool_handle_t *zpool_handle = zpool_open(hdl, pool_path); 3262 3263 if (props && (props = zfs_valid_proplist(hdl, type, props, 3264 zoned, NULL, zpool_handle, errbuf)) == 0) { 3265 zpool_close(zpool_handle); 3266 return (-1); 3267 } 3268 zpool_close(zpool_handle); 3269 3270 if (type == ZFS_TYPE_VOLUME) { 3271 /* 3272 * If we are creating a volume, the size and block size must 3273 * satisfy a few restraints. First, the blocksize must be a 3274 * valid block size between SPA_{MIN,MAX}BLOCKSIZE. Second, the 3275 * volsize must be a multiple of the block size, and cannot be 3276 * zero. 3277 */ 3278 if (props == NULL || nvlist_lookup_uint64(props, 3279 zfs_prop_to_name(ZFS_PROP_VOLSIZE), &size) != 0) { 3280 nvlist_free(props); 3281 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3282 "missing volume size")); 3283 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 3284 } 3285 3286 if ((ret = nvlist_lookup_uint64(props, 3287 zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE), 3288 &blocksize)) != 0) { 3289 if (ret == ENOENT) { 3290 blocksize = zfs_prop_default_numeric( 3291 ZFS_PROP_VOLBLOCKSIZE); 3292 } else { 3293 nvlist_free(props); 3294 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3295 "missing volume block size")); 3296 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 3297 } 3298 } 3299 3300 if (size == 0) { 3301 nvlist_free(props); 3302 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3303 "volume size cannot be zero")); 3304 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 3305 } 3306 3307 if (size % blocksize != 0) { 3308 nvlist_free(props); 3309 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3310 "volume size must be a multiple of volume block " 3311 "size")); 3312 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 3313 } 3314 } 3315 3316 /* create the dataset */ 3317 ret = lzc_create(path, ost, props); 3318 nvlist_free(props); 3319 3320 /* check for failure */ 3321 if (ret != 0) { 3322 char parent[ZFS_MAX_DATASET_NAME_LEN]; 3323 (void) parent_name(path, parent, sizeof (parent)); 3324 3325 switch (errno) { 3326 case ENOENT: 3327 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3328 "no such parent '%s'"), parent); 3329 return (zfs_error(hdl, EZFS_NOENT, errbuf)); 3330 3331 case EINVAL: 3332 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3333 "parent '%s' is not a filesystem"), parent); 3334 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 3335 3336 case ENOTSUP: 3337 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3338 "pool must be upgraded to set this " 3339 "property or value")); 3340 return (zfs_error(hdl, EZFS_BADVERSION, errbuf)); 3341#ifdef _ILP32 3342 case EOVERFLOW: 3343 /* 3344 * This platform can't address a volume this big. 3345 */ 3346 if (type == ZFS_TYPE_VOLUME) 3347 return (zfs_error(hdl, EZFS_VOLTOOBIG, 3348 errbuf)); 3349#endif 3350 /* FALLTHROUGH */ 3351 default: 3352 return (zfs_standard_error(hdl, errno, errbuf)); 3353 } 3354 } 3355 3356 return (0); 3357} 3358 3359/* 3360 * Destroys the given dataset. The caller must make sure that the filesystem 3361 * isn't mounted, and that there are no active dependents. If the file system 3362 * does not exist this function does nothing. 3363 */ 3364int 3365zfs_destroy(zfs_handle_t *zhp, boolean_t defer) 3366{ 3367 zfs_cmd_t zc = { 0 }; 3368 3369 if (zhp->zfs_type == ZFS_TYPE_BOOKMARK) { 3370 nvlist_t *nv = fnvlist_alloc(); 3371 fnvlist_add_boolean(nv, zhp->zfs_name); 3372 int error = lzc_destroy_bookmarks(nv, NULL); 3373 fnvlist_free(nv); 3374 if (error != 0) { 3375 return (zfs_standard_error_fmt(zhp->zfs_hdl, errno, 3376 dgettext(TEXT_DOMAIN, "cannot destroy '%s'"), 3377 zhp->zfs_name)); 3378 } 3379 return (0); 3380 } 3381 3382 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 3383 3384 if (ZFS_IS_VOLUME(zhp)) { 3385 zc.zc_objset_type = DMU_OST_ZVOL; 3386 } else { 3387 zc.zc_objset_type = DMU_OST_ZFS; 3388 } 3389 3390 zc.zc_defer_destroy = defer; 3391 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_DESTROY, &zc) != 0 && 3392 errno != ENOENT) { 3393 return (zfs_standard_error_fmt(zhp->zfs_hdl, errno, 3394 dgettext(TEXT_DOMAIN, "cannot destroy '%s'"), 3395 zhp->zfs_name)); 3396 } 3397 3398 remove_mountpoint(zhp); 3399 3400 return (0); 3401} 3402 3403struct destroydata { 3404 nvlist_t *nvl; 3405 const char *snapname; 3406}; 3407 3408static int 3409zfs_check_snap_cb(zfs_handle_t *zhp, void *arg) 3410{ 3411 struct destroydata *dd = arg; 3412 char name[ZFS_MAX_DATASET_NAME_LEN]; 3413 int rv = 0; 3414 3415 (void) snprintf(name, sizeof (name), 3416 "%s@%s", zhp->zfs_name, dd->snapname); 3417 3418 if (lzc_exists(name)) 3419 verify(nvlist_add_boolean(dd->nvl, name) == 0); 3420 3421 rv = zfs_iter_filesystems(zhp, zfs_check_snap_cb, dd); 3422 zfs_close(zhp); 3423 return (rv); 3424} 3425 3426/* 3427 * Destroys all snapshots with the given name in zhp & descendants. 3428 */ 3429int 3430zfs_destroy_snaps(zfs_handle_t *zhp, char *snapname, boolean_t defer) 3431{ 3432 int ret; 3433 struct destroydata dd = { 0 }; 3434 3435 dd.snapname = snapname; 3436 verify(nvlist_alloc(&dd.nvl, NV_UNIQUE_NAME, 0) == 0); 3437 (void) zfs_check_snap_cb(zfs_handle_dup(zhp), &dd); 3438 3439 if (nvlist_empty(dd.nvl)) { 3440 ret = zfs_standard_error_fmt(zhp->zfs_hdl, ENOENT, 3441 dgettext(TEXT_DOMAIN, "cannot destroy '%s@%s'"), 3442 zhp->zfs_name, snapname); 3443 } else { 3444 ret = zfs_destroy_snaps_nvl(zhp->zfs_hdl, dd.nvl, defer); 3445 } 3446 nvlist_free(dd.nvl); 3447 return (ret); 3448} 3449 3450/* 3451 * Destroys all the snapshots named in the nvlist. 3452 */ 3453int 3454zfs_destroy_snaps_nvl(libzfs_handle_t *hdl, nvlist_t *snaps, boolean_t defer) 3455{ 3456 int ret; 3457 nvlist_t *errlist = NULL; 3458 3459 ret = lzc_destroy_snaps(snaps, defer, &errlist); 3460 3461 if (ret == 0) { 3462 nvlist_free(errlist); 3463 return (0); 3464 } 3465 3466 if (nvlist_empty(errlist)) { 3467 char errbuf[1024]; 3468 (void) snprintf(errbuf, sizeof (errbuf), 3469 dgettext(TEXT_DOMAIN, "cannot destroy snapshots")); 3470 3471 ret = zfs_standard_error(hdl, ret, errbuf); 3472 } 3473 for (nvpair_t *pair = nvlist_next_nvpair(errlist, NULL); 3474 pair != NULL; pair = nvlist_next_nvpair(errlist, pair)) { 3475 char errbuf[1024]; 3476 (void) snprintf(errbuf, sizeof (errbuf), 3477 dgettext(TEXT_DOMAIN, "cannot destroy snapshot %s"), 3478 nvpair_name(pair)); 3479 3480 switch (fnvpair_value_int32(pair)) { 3481 case EEXIST: 3482 zfs_error_aux(hdl, 3483 dgettext(TEXT_DOMAIN, "snapshot is cloned")); 3484 ret = zfs_error(hdl, EZFS_EXISTS, errbuf); 3485 break; 3486 default: 3487 ret = zfs_standard_error(hdl, errno, errbuf); 3488 break; 3489 } 3490 } 3491 3492 nvlist_free(errlist); 3493 return (ret); 3494} 3495 3496/* 3497 * Clones the given dataset. The target must be of the same type as the source. 3498 */ 3499int 3500zfs_clone(zfs_handle_t *zhp, const char *target, nvlist_t *props) 3501{ 3502 char parent[ZFS_MAX_DATASET_NAME_LEN]; 3503 int ret; 3504 char errbuf[1024]; 3505 libzfs_handle_t *hdl = zhp->zfs_hdl; 3506 uint64_t zoned; 3507 3508 assert(zhp->zfs_type == ZFS_TYPE_SNAPSHOT); 3509 3510 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3511 "cannot create '%s'"), target); 3512 3513 /* validate the target/clone name */ 3514 if (!zfs_validate_name(hdl, target, ZFS_TYPE_FILESYSTEM, B_TRUE)) 3515 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3516 3517 /* validate parents exist */ 3518 if (check_parents(hdl, target, &zoned, B_FALSE, NULL) != 0) 3519 return (-1); 3520 3521 (void) parent_name(target, parent, sizeof (parent)); 3522 3523 /* do the clone */ 3524 3525 if (props) { 3526 zfs_type_t type; 3527 if (ZFS_IS_VOLUME(zhp)) { 3528 type = ZFS_TYPE_VOLUME; 3529 } else { 3530 type = ZFS_TYPE_FILESYSTEM; 3531 } 3532 if ((props = zfs_valid_proplist(hdl, type, props, zoned, 3533 zhp, zhp->zpool_hdl, errbuf)) == NULL) 3534 return (-1); 3535 } 3536 3537 ret = lzc_clone(target, zhp->zfs_name, props); 3538 nvlist_free(props); 3539 3540 if (ret != 0) { 3541 switch (errno) { 3542 3543 case ENOENT: 3544 /* 3545 * The parent doesn't exist. We should have caught this 3546 * above, but there may a race condition that has since 3547 * destroyed the parent. 3548 * 3549 * At this point, we don't know whether it's the source 3550 * that doesn't exist anymore, or whether the target 3551 * dataset doesn't exist. 3552 */ 3553 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN, 3554 "no such parent '%s'"), parent); 3555 return (zfs_error(zhp->zfs_hdl, EZFS_NOENT, errbuf)); 3556 3557 case EXDEV: 3558 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN, 3559 "source and target pools differ")); 3560 return (zfs_error(zhp->zfs_hdl, EZFS_CROSSTARGET, 3561 errbuf)); 3562 3563 default: 3564 return (zfs_standard_error(zhp->zfs_hdl, errno, 3565 errbuf)); 3566 } 3567 } 3568 3569 return (ret); 3570} 3571 3572/* 3573 * Promotes the given clone fs to be the clone parent. 3574 */ 3575int 3576zfs_promote(zfs_handle_t *zhp) 3577{ 3578 libzfs_handle_t *hdl = zhp->zfs_hdl; 3579 zfs_cmd_t zc = { 0 }; 3580 char parent[MAXPATHLEN]; 3581 int ret; 3582 char errbuf[1024]; 3583 3584 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3585 "cannot promote '%s'"), zhp->zfs_name); 3586 3587 if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) { 3588 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3589 "snapshots can not be promoted")); 3590 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 3591 } 3592 3593 (void) strlcpy(parent, zhp->zfs_dmustats.dds_origin, sizeof (parent)); 3594 if (parent[0] == '\0') { 3595 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3596 "not a cloned filesystem")); 3597 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 3598 } 3599 3600 (void) strlcpy(zc.zc_value, zhp->zfs_dmustats.dds_origin, 3601 sizeof (zc.zc_value)); 3602 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 3603 ret = zfs_ioctl(hdl, ZFS_IOC_PROMOTE, &zc); 3604 3605 if (ret != 0) { 3606 int save_errno = errno; 3607 3608 switch (save_errno) { 3609 case EEXIST: 3610 /* There is a conflicting snapshot name. */ 3611 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3612 "conflicting snapshot '%s' from parent '%s'"), 3613 zc.zc_string, parent); 3614 return (zfs_error(hdl, EZFS_EXISTS, errbuf)); 3615 3616 default: 3617 return (zfs_standard_error(hdl, save_errno, errbuf)); 3618 } 3619 } 3620 return (ret); 3621} 3622 3623typedef struct snapdata { 3624 nvlist_t *sd_nvl; 3625 const char *sd_snapname; 3626} snapdata_t; 3627 3628static int 3629zfs_snapshot_cb(zfs_handle_t *zhp, void *arg) 3630{ 3631 snapdata_t *sd = arg; 3632 char name[ZFS_MAX_DATASET_NAME_LEN]; 3633 int rv = 0; 3634 3635 if (zfs_prop_get_int(zhp, ZFS_PROP_INCONSISTENT) == 0) { 3636 (void) snprintf(name, sizeof (name), 3637 "%s@%s", zfs_get_name(zhp), sd->sd_snapname); 3638 3639 fnvlist_add_boolean(sd->sd_nvl, name); 3640 3641 rv = zfs_iter_filesystems(zhp, zfs_snapshot_cb, sd); 3642 } 3643 zfs_close(zhp); 3644 3645 return (rv); 3646} 3647 3648/* 3649 * Creates snapshots. The keys in the snaps nvlist are the snapshots to be 3650 * created. 3651 */ 3652int 3653zfs_snapshot_nvl(libzfs_handle_t *hdl, nvlist_t *snaps, nvlist_t *props) 3654{ 3655 int ret; 3656 char errbuf[1024]; 3657 nvpair_t *elem; 3658 nvlist_t *errors; 3659 3660 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3661 "cannot create snapshots ")); 3662 3663 elem = NULL; 3664 while ((elem = nvlist_next_nvpair(snaps, elem)) != NULL) { 3665 const char *snapname = nvpair_name(elem); 3666 3667 /* validate the target name */ 3668 if (!zfs_validate_name(hdl, snapname, ZFS_TYPE_SNAPSHOT, 3669 B_TRUE)) { 3670 (void) snprintf(errbuf, sizeof (errbuf), 3671 dgettext(TEXT_DOMAIN, 3672 "cannot create snapshot '%s'"), snapname); 3673 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3674 } 3675 } 3676 3677 /* 3678 * get pool handle for prop validation. assumes all snaps are in the 3679 * same pool, as does lzc_snapshot (below). 3680 */ 3681 char pool[ZFS_MAX_DATASET_NAME_LEN]; 3682 elem = nvlist_next_nvpair(snaps, NULL); 3683 (void) strlcpy(pool, nvpair_name(elem), sizeof (pool)); 3684 pool[strcspn(pool, "/@")] = '\0'; 3685 zpool_handle_t *zpool_hdl = zpool_open(hdl, pool); 3686 3687 if (props != NULL && 3688 (props = zfs_valid_proplist(hdl, ZFS_TYPE_SNAPSHOT, 3689 props, B_FALSE, NULL, zpool_hdl, errbuf)) == NULL) { 3690 zpool_close(zpool_hdl); 3691 return (-1); 3692 } 3693 zpool_close(zpool_hdl); 3694 3695 ret = lzc_snapshot(snaps, props, &errors); 3696 3697 if (ret != 0) { 3698 boolean_t printed = B_FALSE; 3699 for (elem = nvlist_next_nvpair(errors, NULL); 3700 elem != NULL; 3701 elem = nvlist_next_nvpair(errors, elem)) { 3702 (void) snprintf(errbuf, sizeof (errbuf), 3703 dgettext(TEXT_DOMAIN, 3704 "cannot create snapshot '%s'"), nvpair_name(elem)); 3705 (void) zfs_standard_error(hdl, 3706 fnvpair_value_int32(elem), errbuf); 3707 printed = B_TRUE; 3708 } 3709 if (!printed) { 3710 switch (ret) { 3711 case EXDEV: 3712 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3713 "multiple snapshots of same " 3714 "fs not allowed")); 3715 (void) zfs_error(hdl, EZFS_EXISTS, errbuf); 3716 3717 break; 3718 default: 3719 (void) zfs_standard_error(hdl, ret, errbuf); 3720 } 3721 } 3722 } 3723 3724 nvlist_free(props); 3725 nvlist_free(errors); 3726 return (ret); 3727} 3728 3729int 3730zfs_snapshot(libzfs_handle_t *hdl, const char *path, boolean_t recursive, 3731 nvlist_t *props) 3732{ 3733 int ret; 3734 snapdata_t sd = { 0 }; 3735 char fsname[ZFS_MAX_DATASET_NAME_LEN]; 3736 char *cp; 3737 zfs_handle_t *zhp; 3738 char errbuf[1024]; 3739 3740 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3741 "cannot snapshot %s"), path); 3742 3743 if (!zfs_validate_name(hdl, path, ZFS_TYPE_SNAPSHOT, B_TRUE)) 3744 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3745 3746 (void) strlcpy(fsname, path, sizeof (fsname)); 3747 cp = strchr(fsname, '@'); 3748 *cp = '\0'; 3749 sd.sd_snapname = cp + 1; 3750 3751 if ((zhp = zfs_open(hdl, fsname, ZFS_TYPE_FILESYSTEM | 3752 ZFS_TYPE_VOLUME)) == NULL) { 3753 return (-1); 3754 } 3755 3756 verify(nvlist_alloc(&sd.sd_nvl, NV_UNIQUE_NAME, 0) == 0); 3757 if (recursive) { 3758 (void) zfs_snapshot_cb(zfs_handle_dup(zhp), &sd); 3759 } else { 3760 fnvlist_add_boolean(sd.sd_nvl, path); 3761 } 3762 3763 ret = zfs_snapshot_nvl(hdl, sd.sd_nvl, props); 3764 nvlist_free(sd.sd_nvl); 3765 zfs_close(zhp); 3766 return (ret); 3767} 3768 3769/* 3770 * Destroy any more recent snapshots. We invoke this callback on any dependents 3771 * of the snapshot first. If the 'cb_dependent' member is non-zero, then this 3772 * is a dependent and we should just destroy it without checking the transaction 3773 * group. 3774 */ 3775typedef struct rollback_data { 3776 const char *cb_target; /* the snapshot */ 3777 uint64_t cb_create; /* creation time reference */ 3778 boolean_t cb_error; 3779 boolean_t cb_force; 3780} rollback_data_t; 3781 3782static int 3783rollback_destroy_dependent(zfs_handle_t *zhp, void *data) 3784{ 3785 rollback_data_t *cbp = data; 3786 prop_changelist_t *clp; 3787 3788 /* We must destroy this clone; first unmount it */ 3789 clp = changelist_gather(zhp, ZFS_PROP_NAME, 0, 3790 cbp->cb_force ? MS_FORCE: 0); 3791 if (clp == NULL || changelist_prefix(clp) != 0) { 3792 cbp->cb_error = B_TRUE; 3793 zfs_close(zhp); 3794 return (0); 3795 } 3796 if (zfs_destroy(zhp, B_FALSE) != 0) 3797 cbp->cb_error = B_TRUE; 3798 else 3799 changelist_remove(clp, zhp->zfs_name); 3800 (void) changelist_postfix(clp); 3801 changelist_free(clp); 3802 3803 zfs_close(zhp); 3804 return (0); 3805} 3806 3807static int 3808rollback_destroy(zfs_handle_t *zhp, void *data) 3809{ 3810 rollback_data_t *cbp = data; 3811 3812 if (zfs_prop_get_int(zhp, ZFS_PROP_CREATETXG) > cbp->cb_create) { 3813 cbp->cb_error |= zfs_iter_dependents(zhp, B_FALSE, 3814 rollback_destroy_dependent, cbp); 3815 3816 cbp->cb_error |= zfs_destroy(zhp, B_FALSE); 3817 } 3818 3819 zfs_close(zhp); 3820 return (0); 3821} 3822 3823/* 3824 * Given a dataset, rollback to a specific snapshot, discarding any 3825 * data changes since then and making it the active dataset. 3826 * 3827 * Any snapshots and bookmarks more recent than the target are 3828 * destroyed, along with their dependents (i.e. clones). 3829 */ 3830int 3831zfs_rollback(zfs_handle_t *zhp, zfs_handle_t *snap, boolean_t force) 3832{ 3833 rollback_data_t cb = { 0 }; 3834 int err; 3835 boolean_t restore_resv = 0; 3836 uint64_t old_volsize = 0, new_volsize; 3837 zfs_prop_t resv_prop; 3838 3839 assert(zhp->zfs_type == ZFS_TYPE_FILESYSTEM || 3840 zhp->zfs_type == ZFS_TYPE_VOLUME); 3841 3842 /* 3843 * Destroy all recent snapshots and their dependents. 3844 */ 3845 cb.cb_force = force; 3846 cb.cb_target = snap->zfs_name; 3847 cb.cb_create = zfs_prop_get_int(snap, ZFS_PROP_CREATETXG); 3848 (void) zfs_iter_snapshots(zhp, B_FALSE, rollback_destroy, &cb); 3849 (void) zfs_iter_bookmarks(zhp, rollback_destroy, &cb); 3850 3851 if (cb.cb_error) 3852 return (-1); 3853 3854 /* 3855 * Now that we have verified that the snapshot is the latest, 3856 * rollback to the given snapshot. 3857 */ 3858 3859 if (zhp->zfs_type == ZFS_TYPE_VOLUME) { 3860 if (zfs_which_resv_prop(zhp, &resv_prop) < 0) 3861 return (-1); 3862 old_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE); 3863 restore_resv = 3864 (old_volsize == zfs_prop_get_int(zhp, resv_prop)); 3865 } 3866 3867 /* 3868 * We rely on zfs_iter_children() to verify that there are no 3869 * newer snapshots for the given dataset. Therefore, we can 3870 * simply pass the name on to the ioctl() call. There is still 3871 * an unlikely race condition where the user has taken a 3872 * snapshot since we verified that this was the most recent. 3873 */ 3874 err = lzc_rollback(zhp->zfs_name, NULL, 0); 3875 if (err != 0) { 3876 (void) zfs_standard_error_fmt(zhp->zfs_hdl, errno, 3877 dgettext(TEXT_DOMAIN, "cannot rollback '%s'"), 3878 zhp->zfs_name); 3879 return (err); 3880 } 3881 3882 /* 3883 * For volumes, if the pre-rollback volsize matched the pre- 3884 * rollback reservation and the volsize has changed then set 3885 * the reservation property to the post-rollback volsize. 3886 * Make a new handle since the rollback closed the dataset. 3887 */ 3888 if ((zhp->zfs_type == ZFS_TYPE_VOLUME) && 3889 (zhp = make_dataset_handle(zhp->zfs_hdl, zhp->zfs_name))) { 3890 if (restore_resv) { 3891 new_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE); 3892 if (old_volsize != new_volsize) 3893 err = zfs_prop_set_int(zhp, resv_prop, 3894 new_volsize); 3895 } 3896 zfs_close(zhp); 3897 } 3898 return (err); 3899} 3900 3901/* 3902 * Renames the given dataset. 3903 */ 3904int 3905zfs_rename(zfs_handle_t *zhp, const char *source, const char *target, 3906 renameflags_t flags) 3907{ 3908 int ret = 0; 3909 zfs_cmd_t zc = { 0 }; 3910 char *delim; 3911 prop_changelist_t *cl = NULL; 3912 zfs_handle_t *zhrp = NULL; 3913 char *parentname = NULL; 3914 char parent[ZFS_MAX_DATASET_NAME_LEN]; 3915 char property[ZFS_MAXPROPLEN]; 3916 libzfs_handle_t *hdl = zhp->zfs_hdl; 3917 char errbuf[1024]; 3918 3919 /* if we have the same exact name, just return success */ 3920 if (strcmp(zhp->zfs_name, target) == 0) 3921 return (0); 3922 3923 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3924 "cannot rename to '%s'"), target); 3925 3926 if (source != NULL) { 3927 /* 3928 * This is recursive snapshots rename, put snapshot name 3929 * (that might not exist) into zfs_name. 3930 */ 3931 assert(flags.recurse); 3932 3933 (void) strlcat(zhp->zfs_name, "@", sizeof(zhp->zfs_name)); 3934 (void) strlcat(zhp->zfs_name, source, sizeof(zhp->zfs_name)); 3935 zhp->zfs_type = ZFS_TYPE_SNAPSHOT; 3936 } 3937 3938 /* 3939 * Make sure the target name is valid 3940 */ 3941 if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) { 3942 if ((strchr(target, '@') == NULL) || 3943 *target == '@') { 3944 /* 3945 * Snapshot target name is abbreviated, 3946 * reconstruct full dataset name 3947 */ 3948 (void) strlcpy(parent, zhp->zfs_name, 3949 sizeof (parent)); 3950 delim = strchr(parent, '@'); 3951 if (strchr(target, '@') == NULL) 3952 *(++delim) = '\0'; 3953 else 3954 *delim = '\0'; 3955 (void) strlcat(parent, target, sizeof (parent)); 3956 target = parent; 3957 } else { 3958 /* 3959 * Make sure we're renaming within the same dataset. 3960 */ 3961 delim = strchr(target, '@'); 3962 if (strncmp(zhp->zfs_name, target, delim - target) 3963 != 0 || zhp->zfs_name[delim - target] != '@') { 3964 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3965 "snapshots must be part of same " 3966 "dataset")); 3967 return (zfs_error(hdl, EZFS_CROSSTARGET, 3968 errbuf)); 3969 } 3970 } 3971 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE)) 3972 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3973 } else { 3974 if (flags.recurse) { 3975 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3976 "recursive rename must be a snapshot")); 3977 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 3978 } 3979 3980 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE)) 3981 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3982 3983 /* validate parents */ 3984 if (check_parents(hdl, target, NULL, B_FALSE, NULL) != 0) 3985 return (-1); 3986 3987 /* make sure we're in the same pool */ 3988 verify((delim = strchr(target, '/')) != NULL); 3989 if (strncmp(zhp->zfs_name, target, delim - target) != 0 || 3990 zhp->zfs_name[delim - target] != '/') { 3991 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3992 "datasets must be within same pool")); 3993 return (zfs_error(hdl, EZFS_CROSSTARGET, errbuf)); 3994 } 3995 3996 /* new name cannot be a child of the current dataset name */ 3997 if (is_descendant(zhp->zfs_name, target)) { 3998 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3999 "New dataset name cannot be a descendant of " 4000 "current dataset name")); 4001 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 4002 } 4003 } 4004 4005 (void) snprintf(errbuf, sizeof (errbuf), 4006 dgettext(TEXT_DOMAIN, "cannot rename '%s'"), zhp->zfs_name); 4007 4008 if (getzoneid() == GLOBAL_ZONEID && 4009 zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) { 4010 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4011 "dataset is used in a non-global zone")); 4012 return (zfs_error(hdl, EZFS_ZONED, errbuf)); 4013 } 4014 4015 /* 4016 * Avoid unmounting file systems with mountpoint property set to 4017 * 'legacy' or 'none' even if -u option is not given. 4018 */ 4019 if (zhp->zfs_type == ZFS_TYPE_FILESYSTEM && 4020 !flags.recurse && !flags.nounmount && 4021 zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, property, 4022 sizeof (property), NULL, NULL, 0, B_FALSE) == 0 && 4023 (strcmp(property, "legacy") == 0 || 4024 strcmp(property, "none") == 0)) { 4025 flags.nounmount = B_TRUE; 4026 } 4027 if (flags.recurse) { 4028 4029 parentname = zfs_strdup(zhp->zfs_hdl, zhp->zfs_name); 4030 if (parentname == NULL) { 4031 ret = -1; 4032 goto error; 4033 } 4034 delim = strchr(parentname, '@'); 4035 *delim = '\0'; 4036 zhrp = zfs_open(zhp->zfs_hdl, parentname, ZFS_TYPE_DATASET); 4037 if (zhrp == NULL) { 4038 ret = -1; 4039 goto error; 4040 } 4041 } else if (zhp->zfs_type != ZFS_TYPE_SNAPSHOT) { 4042 if ((cl = changelist_gather(zhp, ZFS_PROP_NAME, 4043 flags.nounmount ? CL_GATHER_DONT_UNMOUNT : 0, 4044 flags.forceunmount ? MS_FORCE : 0)) == NULL) { 4045 return (-1); 4046 } 4047 4048 if (changelist_haszonedchild(cl)) { 4049 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4050 "child dataset with inherited mountpoint is used " 4051 "in a non-global zone")); 4052 (void) zfs_error(hdl, EZFS_ZONED, errbuf); 4053 ret = -1; 4054 goto error; 4055 } 4056 4057 if ((ret = changelist_prefix(cl)) != 0) 4058 goto error; 4059 } 4060 4061 if (ZFS_IS_VOLUME(zhp)) 4062 zc.zc_objset_type = DMU_OST_ZVOL; 4063 else 4064 zc.zc_objset_type = DMU_OST_ZFS; 4065 4066 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 4067 (void) strlcpy(zc.zc_value, target, sizeof (zc.zc_value)); 4068 4069 zc.zc_cookie = flags.recurse ? 1 : 0; 4070 if (flags.nounmount) 4071 zc.zc_cookie |= 2; 4072 4073 if ((ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_RENAME, &zc)) != 0) { 4074 /* 4075 * if it was recursive, the one that actually failed will 4076 * be in zc.zc_name 4077 */ 4078 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 4079 "cannot rename '%s'"), zc.zc_name); 4080 4081 if (flags.recurse && errno == EEXIST) { 4082 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4083 "a child dataset already has a snapshot " 4084 "with the new name")); 4085 (void) zfs_error(hdl, EZFS_EXISTS, errbuf); 4086 } else { 4087 (void) zfs_standard_error(zhp->zfs_hdl, errno, errbuf); 4088 } 4089 4090 /* 4091 * On failure, we still want to remount any filesystems that 4092 * were previously mounted, so we don't alter the system state. 4093 */ 4094 if (cl != NULL) 4095 (void) changelist_postfix(cl); 4096 } else { 4097 if (cl != NULL) { 4098 changelist_rename(cl, zfs_get_name(zhp), target); 4099 ret = changelist_postfix(cl); 4100 } 4101 } 4102 4103error: 4104 if (parentname != NULL) { 4105 free(parentname); 4106 } 4107 if (zhrp != NULL) { 4108 zfs_close(zhrp); 4109 } 4110 if (cl != NULL) { 4111 changelist_free(cl); 4112 } 4113 return (ret); 4114} 4115 4116nvlist_t * 4117zfs_get_user_props(zfs_handle_t *zhp) 4118{ 4119 return (zhp->zfs_user_props); 4120} 4121 4122nvlist_t * 4123zfs_get_recvd_props(zfs_handle_t *zhp) 4124{ 4125 if (zhp->zfs_recvd_props == NULL) 4126 if (get_recvd_props_ioctl(zhp) != 0) 4127 return (NULL); 4128 return (zhp->zfs_recvd_props); 4129} 4130 4131/* 4132 * This function is used by 'zfs list' to determine the exact set of columns to 4133 * display, and their maximum widths. This does two main things: 4134 * 4135 * - If this is a list of all properties, then expand the list to include 4136 * all native properties, and set a flag so that for each dataset we look 4137 * for new unique user properties and add them to the list. 4138 * 4139 * - For non fixed-width properties, keep track of the maximum width seen 4140 * so that we can size the column appropriately. If the user has 4141 * requested received property values, we also need to compute the width 4142 * of the RECEIVED column. 4143 */ 4144int 4145zfs_expand_proplist(zfs_handle_t *zhp, zprop_list_t **plp, boolean_t received, 4146 boolean_t literal) 4147{ 4148 libzfs_handle_t *hdl = zhp->zfs_hdl; 4149 zprop_list_t *entry; 4150 zprop_list_t **last, **start; 4151 nvlist_t *userprops, *propval; 4152 nvpair_t *elem; 4153 char *strval; 4154 char buf[ZFS_MAXPROPLEN]; 4155 4156 if (zprop_expand_list(hdl, plp, ZFS_TYPE_DATASET) != 0) 4157 return (-1); 4158 4159 userprops = zfs_get_user_props(zhp); 4160 4161 entry = *plp; 4162 if (entry->pl_all && nvlist_next_nvpair(userprops, NULL) != NULL) { 4163 /* 4164 * Go through and add any user properties as necessary. We 4165 * start by incrementing our list pointer to the first 4166 * non-native property. 4167 */ 4168 start = plp; 4169 while (*start != NULL) { 4170 if ((*start)->pl_prop == ZPROP_INVAL) 4171 break; 4172 start = &(*start)->pl_next; 4173 } 4174 4175 elem = NULL; 4176 while ((elem = nvlist_next_nvpair(userprops, elem)) != NULL) { 4177 /* 4178 * See if we've already found this property in our list. 4179 */ 4180 for (last = start; *last != NULL; 4181 last = &(*last)->pl_next) { 4182 if (strcmp((*last)->pl_user_prop, 4183 nvpair_name(elem)) == 0) 4184 break; 4185 } 4186 4187 if (*last == NULL) { 4188 if ((entry = zfs_alloc(hdl, 4189 sizeof (zprop_list_t))) == NULL || 4190 ((entry->pl_user_prop = zfs_strdup(hdl, 4191 nvpair_name(elem)))) == NULL) { 4192 free(entry); 4193 return (-1); 4194 } 4195 4196 entry->pl_prop = ZPROP_INVAL; 4197 entry->pl_width = strlen(nvpair_name(elem)); 4198 entry->pl_all = B_TRUE; 4199 *last = entry; 4200 } 4201 } 4202 } 4203 4204 /* 4205 * Now go through and check the width of any non-fixed columns 4206 */ 4207 for (entry = *plp; entry != NULL; entry = entry->pl_next) { 4208 if (entry->pl_fixed && !literal) 4209 continue; 4210 4211 if (entry->pl_prop != ZPROP_INVAL) { 4212 if (zfs_prop_get(zhp, entry->pl_prop, 4213 buf, sizeof (buf), NULL, NULL, 0, literal) == 0) { 4214 if (strlen(buf) > entry->pl_width) 4215 entry->pl_width = strlen(buf); 4216 } 4217 if (received && zfs_prop_get_recvd(zhp, 4218 zfs_prop_to_name(entry->pl_prop), 4219 buf, sizeof (buf), literal) == 0) 4220 if (strlen(buf) > entry->pl_recvd_width) 4221 entry->pl_recvd_width = strlen(buf); 4222 } else { 4223 if (nvlist_lookup_nvlist(userprops, entry->pl_user_prop, 4224 &propval) == 0) { 4225 verify(nvlist_lookup_string(propval, 4226 ZPROP_VALUE, &strval) == 0); 4227 if (strlen(strval) > entry->pl_width) 4228 entry->pl_width = strlen(strval); 4229 } 4230 if (received && zfs_prop_get_recvd(zhp, 4231 entry->pl_user_prop, 4232 buf, sizeof (buf), literal) == 0) 4233 if (strlen(buf) > entry->pl_recvd_width) 4234 entry->pl_recvd_width = strlen(buf); 4235 } 4236 } 4237 4238 return (0); 4239} 4240 4241int 4242zfs_deleg_share_nfs(libzfs_handle_t *hdl, char *dataset, char *path, 4243 char *resource, void *export, void *sharetab, 4244 int sharemax, zfs_share_op_t operation) 4245{ 4246 zfs_cmd_t zc = { 0 }; 4247 int error; 4248 4249 (void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name)); 4250 (void) strlcpy(zc.zc_value, path, sizeof (zc.zc_value)); 4251 if (resource) 4252 (void) strlcpy(zc.zc_string, resource, sizeof (zc.zc_string)); 4253 zc.zc_share.z_sharedata = (uint64_t)(uintptr_t)sharetab; 4254 zc.zc_share.z_exportdata = (uint64_t)(uintptr_t)export; 4255 zc.zc_share.z_sharetype = operation; 4256 zc.zc_share.z_sharemax = sharemax; 4257 error = ioctl(hdl->libzfs_fd, ZFS_IOC_SHARE, &zc); 4258 return (error); 4259} 4260 4261void 4262zfs_prune_proplist(zfs_handle_t *zhp, uint8_t *props) 4263{ 4264 nvpair_t *curr; 4265 4266 /* 4267 * Keep a reference to the props-table against which we prune the 4268 * properties. 4269 */ 4270 zhp->zfs_props_table = props; 4271 4272 curr = nvlist_next_nvpair(zhp->zfs_props, NULL); 4273 4274 while (curr) { 4275 zfs_prop_t zfs_prop = zfs_name_to_prop(nvpair_name(curr)); 4276 nvpair_t *next = nvlist_next_nvpair(zhp->zfs_props, curr); 4277 4278 /* 4279 * User properties will result in ZPROP_INVAL, and since we 4280 * only know how to prune standard ZFS properties, we always 4281 * leave these in the list. This can also happen if we 4282 * encounter an unknown DSL property (when running older 4283 * software, for example). 4284 */ 4285 if (zfs_prop != ZPROP_INVAL && props[zfs_prop] == B_FALSE) 4286 (void) nvlist_remove(zhp->zfs_props, 4287 nvpair_name(curr), nvpair_type(curr)); 4288 curr = next; 4289 } 4290} 4291 4292#ifdef illumos 4293static int 4294zfs_smb_acl_mgmt(libzfs_handle_t *hdl, char *dataset, char *path, 4295 zfs_smb_acl_op_t cmd, char *resource1, char *resource2) 4296{ 4297 zfs_cmd_t zc = { 0 }; 4298 nvlist_t *nvlist = NULL; 4299 int error; 4300 4301 (void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name)); 4302 (void) strlcpy(zc.zc_value, path, sizeof (zc.zc_value)); 4303 zc.zc_cookie = (uint64_t)cmd; 4304 4305 if (cmd == ZFS_SMB_ACL_RENAME) { 4306 if (nvlist_alloc(&nvlist, NV_UNIQUE_NAME, 0) != 0) { 4307 (void) no_memory(hdl); 4308 return (0); 4309 } 4310 } 4311 4312 switch (cmd) { 4313 case ZFS_SMB_ACL_ADD: 4314 case ZFS_SMB_ACL_REMOVE: 4315 (void) strlcpy(zc.zc_string, resource1, sizeof (zc.zc_string)); 4316 break; 4317 case ZFS_SMB_ACL_RENAME: 4318 if (nvlist_add_string(nvlist, ZFS_SMB_ACL_SRC, 4319 resource1) != 0) { 4320 (void) no_memory(hdl); 4321 return (-1); 4322 } 4323 if (nvlist_add_string(nvlist, ZFS_SMB_ACL_TARGET, 4324 resource2) != 0) { 4325 (void) no_memory(hdl); 4326 return (-1); 4327 } 4328 if (zcmd_write_src_nvlist(hdl, &zc, nvlist) != 0) { 4329 nvlist_free(nvlist); 4330 return (-1); 4331 } 4332 break; 4333 case ZFS_SMB_ACL_PURGE: 4334 break; 4335 default: 4336 return (-1); 4337 } 4338 error = ioctl(hdl->libzfs_fd, ZFS_IOC_SMB_ACL, &zc); 4339 nvlist_free(nvlist); 4340 return (error); 4341} 4342 4343int 4344zfs_smb_acl_add(libzfs_handle_t *hdl, char *dataset, 4345 char *path, char *resource) 4346{ 4347 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_ADD, 4348 resource, NULL)); 4349} 4350 4351int 4352zfs_smb_acl_remove(libzfs_handle_t *hdl, char *dataset, 4353 char *path, char *resource) 4354{ 4355 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_REMOVE, 4356 resource, NULL)); 4357} 4358 4359int 4360zfs_smb_acl_purge(libzfs_handle_t *hdl, char *dataset, char *path) 4361{ 4362 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_PURGE, 4363 NULL, NULL)); 4364} 4365 4366int 4367zfs_smb_acl_rename(libzfs_handle_t *hdl, char *dataset, char *path, 4368 char *oldname, char *newname) 4369{ 4370 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_RENAME, 4371 oldname, newname)); 4372} 4373#endif /* illumos */ 4374 4375int 4376zfs_userspace(zfs_handle_t *zhp, zfs_userquota_prop_t type, 4377 zfs_userspace_cb_t func, void *arg) 4378{ 4379 zfs_cmd_t zc = { 0 }; 4380 zfs_useracct_t buf[100]; 4381 libzfs_handle_t *hdl = zhp->zfs_hdl; 4382 int ret; 4383 4384 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 4385 4386 zc.zc_objset_type = type; 4387 zc.zc_nvlist_dst = (uintptr_t)buf; 4388 4389 for (;;) { 4390 zfs_useracct_t *zua = buf; 4391 4392 zc.zc_nvlist_dst_size = sizeof (buf); 4393 if (zfs_ioctl(hdl, ZFS_IOC_USERSPACE_MANY, &zc) != 0) { 4394 char errbuf[1024]; 4395 4396 (void) snprintf(errbuf, sizeof (errbuf), 4397 dgettext(TEXT_DOMAIN, 4398 "cannot get used/quota for %s"), zc.zc_name); 4399 return (zfs_standard_error_fmt(hdl, errno, errbuf)); 4400 } 4401 if (zc.zc_nvlist_dst_size == 0) 4402 break; 4403 4404 while (zc.zc_nvlist_dst_size > 0) { 4405 if ((ret = func(arg, zua->zu_domain, zua->zu_rid, 4406 zua->zu_space)) != 0) 4407 return (ret); 4408 zua++; 4409 zc.zc_nvlist_dst_size -= sizeof (zfs_useracct_t); 4410 } 4411 } 4412 4413 return (0); 4414} 4415 4416struct holdarg { 4417 nvlist_t *nvl; 4418 const char *snapname; 4419 const char *tag; 4420 boolean_t recursive; 4421 int error; 4422}; 4423 4424static int 4425zfs_hold_one(zfs_handle_t *zhp, void *arg) 4426{ 4427 struct holdarg *ha = arg; 4428 char name[ZFS_MAX_DATASET_NAME_LEN]; 4429 int rv = 0; 4430 4431 (void) snprintf(name, sizeof (name), 4432 "%s@%s", zhp->zfs_name, ha->snapname); 4433 4434 if (lzc_exists(name)) 4435 fnvlist_add_string(ha->nvl, name, ha->tag); 4436 4437 if (ha->recursive) 4438 rv = zfs_iter_filesystems(zhp, zfs_hold_one, ha); 4439 zfs_close(zhp); 4440 return (rv); 4441} 4442 4443int 4444zfs_hold(zfs_handle_t *zhp, const char *snapname, const char *tag, 4445 boolean_t recursive, int cleanup_fd) 4446{ 4447 int ret; 4448 struct holdarg ha; 4449 4450 ha.nvl = fnvlist_alloc(); 4451 ha.snapname = snapname; 4452 ha.tag = tag; 4453 ha.recursive = recursive; 4454 (void) zfs_hold_one(zfs_handle_dup(zhp), &ha); 4455 4456 if (nvlist_empty(ha.nvl)) { 4457 char errbuf[1024]; 4458 4459 fnvlist_free(ha.nvl); 4460 ret = ENOENT; 4461 (void) snprintf(errbuf, sizeof (errbuf), 4462 dgettext(TEXT_DOMAIN, 4463 "cannot hold snapshot '%s@%s'"), 4464 zhp->zfs_name, snapname); 4465 (void) zfs_standard_error(zhp->zfs_hdl, ret, errbuf); 4466 return (ret); 4467 } 4468 4469 ret = zfs_hold_nvl(zhp, cleanup_fd, ha.nvl); 4470 fnvlist_free(ha.nvl); 4471 4472 return (ret); 4473} 4474 4475int 4476zfs_hold_nvl(zfs_handle_t *zhp, int cleanup_fd, nvlist_t *holds) 4477{ 4478 int ret; 4479 nvlist_t *errors; 4480 libzfs_handle_t *hdl = zhp->zfs_hdl; 4481 char errbuf[1024]; 4482 nvpair_t *elem; 4483 4484 errors = NULL; 4485 ret = lzc_hold(holds, cleanup_fd, &errors); 4486 4487 if (ret == 0) { 4488 /* There may be errors even in the success case. */ 4489 fnvlist_free(errors); 4490 return (0); 4491 } 4492 4493 if (nvlist_empty(errors)) { 4494 /* no hold-specific errors */ 4495 (void) snprintf(errbuf, sizeof (errbuf), 4496 dgettext(TEXT_DOMAIN, "cannot hold")); 4497 switch (ret) { 4498 case ENOTSUP: 4499 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4500 "pool must be upgraded")); 4501 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf); 4502 break; 4503 case EINVAL: 4504 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf); 4505 break; 4506 default: 4507 (void) zfs_standard_error(hdl, ret, errbuf); 4508 } 4509 } 4510 4511 for (elem = nvlist_next_nvpair(errors, NULL); 4512 elem != NULL; 4513 elem = nvlist_next_nvpair(errors, elem)) { 4514 (void) snprintf(errbuf, sizeof (errbuf), 4515 dgettext(TEXT_DOMAIN, 4516 "cannot hold snapshot '%s'"), nvpair_name(elem)); 4517 switch (fnvpair_value_int32(elem)) { 4518 case E2BIG: 4519 /* 4520 * Temporary tags wind up having the ds object id 4521 * prepended. So even if we passed the length check 4522 * above, it's still possible for the tag to wind 4523 * up being slightly too long. 4524 */ 4525 (void) zfs_error(hdl, EZFS_TAGTOOLONG, errbuf); 4526 break; 4527 case EINVAL: 4528 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf); 4529 break; 4530 case EEXIST: 4531 (void) zfs_error(hdl, EZFS_REFTAG_HOLD, errbuf); 4532 break; 4533 default: 4534 (void) zfs_standard_error(hdl, 4535 fnvpair_value_int32(elem), errbuf); 4536 } 4537 } 4538 4539 fnvlist_free(errors); 4540 return (ret); 4541} 4542 4543static int 4544zfs_release_one(zfs_handle_t *zhp, void *arg) 4545{ 4546 struct holdarg *ha = arg; 4547 char name[ZFS_MAX_DATASET_NAME_LEN]; 4548 int rv = 0; 4549 nvlist_t *existing_holds; 4550 4551 (void) snprintf(name, sizeof (name), 4552 "%s@%s", zhp->zfs_name, ha->snapname); 4553 4554 if (lzc_get_holds(name, &existing_holds) != 0) { 4555 ha->error = ENOENT; 4556 } else if (!nvlist_exists(existing_holds, ha->tag)) { 4557 ha->error = ESRCH; 4558 } else { 4559 nvlist_t *torelease = fnvlist_alloc(); 4560 fnvlist_add_boolean(torelease, ha->tag); 4561 fnvlist_add_nvlist(ha->nvl, name, torelease); 4562 fnvlist_free(torelease); 4563 } 4564 4565 if (ha->recursive) 4566 rv = zfs_iter_filesystems(zhp, zfs_release_one, ha); 4567 zfs_close(zhp); 4568 return (rv); 4569} 4570 4571int 4572zfs_release(zfs_handle_t *zhp, const char *snapname, const char *tag, 4573 boolean_t recursive) 4574{ 4575 int ret; 4576 struct holdarg ha; 4577 nvlist_t *errors = NULL; 4578 nvpair_t *elem; 4579 libzfs_handle_t *hdl = zhp->zfs_hdl; 4580 char errbuf[1024]; 4581 4582 ha.nvl = fnvlist_alloc(); 4583 ha.snapname = snapname; 4584 ha.tag = tag; 4585 ha.recursive = recursive; 4586 ha.error = 0; 4587 (void) zfs_release_one(zfs_handle_dup(zhp), &ha); 4588 4589 if (nvlist_empty(ha.nvl)) { 4590 fnvlist_free(ha.nvl); 4591 ret = ha.error; 4592 (void) snprintf(errbuf, sizeof (errbuf), 4593 dgettext(TEXT_DOMAIN, 4594 "cannot release hold from snapshot '%s@%s'"), 4595 zhp->zfs_name, snapname); 4596 if (ret == ESRCH) { 4597 (void) zfs_error(hdl, EZFS_REFTAG_RELE, errbuf); 4598 } else { 4599 (void) zfs_standard_error(hdl, ret, errbuf); 4600 } 4601 return (ret); 4602 } 4603 4604 ret = lzc_release(ha.nvl, &errors); 4605 fnvlist_free(ha.nvl); 4606 4607 if (ret == 0) { 4608 /* There may be errors even in the success case. */ 4609 fnvlist_free(errors); 4610 return (0); 4611 } 4612 4613 if (nvlist_empty(errors)) { 4614 /* no hold-specific errors */ 4615 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 4616 "cannot release")); 4617 switch (errno) { 4618 case ENOTSUP: 4619 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4620 "pool must be upgraded")); 4621 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf); 4622 break; 4623 default: 4624 (void) zfs_standard_error_fmt(hdl, errno, errbuf); 4625 } 4626 } 4627 4628 for (elem = nvlist_next_nvpair(errors, NULL); 4629 elem != NULL; 4630 elem = nvlist_next_nvpair(errors, elem)) { 4631 (void) snprintf(errbuf, sizeof (errbuf), 4632 dgettext(TEXT_DOMAIN, 4633 "cannot release hold from snapshot '%s'"), 4634 nvpair_name(elem)); 4635 switch (fnvpair_value_int32(elem)) { 4636 case ESRCH: 4637 (void) zfs_error(hdl, EZFS_REFTAG_RELE, errbuf); 4638 break; 4639 case EINVAL: 4640 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf); 4641 break; 4642 default: 4643 (void) zfs_standard_error_fmt(hdl, 4644 fnvpair_value_int32(elem), errbuf); 4645 } 4646 } 4647 4648 fnvlist_free(errors); 4649 return (ret); 4650} 4651 4652int 4653zfs_get_fsacl(zfs_handle_t *zhp, nvlist_t **nvl) 4654{ 4655 zfs_cmd_t zc = { 0 }; 4656 libzfs_handle_t *hdl = zhp->zfs_hdl; 4657 int nvsz = 2048; 4658 void *nvbuf; 4659 int err = 0; 4660 char errbuf[1024]; 4661 4662 assert(zhp->zfs_type == ZFS_TYPE_VOLUME || 4663 zhp->zfs_type == ZFS_TYPE_FILESYSTEM); 4664 4665tryagain: 4666 4667 nvbuf = malloc(nvsz); 4668 if (nvbuf == NULL) { 4669 err = (zfs_error(hdl, EZFS_NOMEM, strerror(errno))); 4670 goto out; 4671 } 4672 4673 zc.zc_nvlist_dst_size = nvsz; 4674 zc.zc_nvlist_dst = (uintptr_t)nvbuf; 4675 4676 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 4677 4678 if (ioctl(hdl->libzfs_fd, ZFS_IOC_GET_FSACL, &zc) != 0) { 4679 (void) snprintf(errbuf, sizeof (errbuf), 4680 dgettext(TEXT_DOMAIN, "cannot get permissions on '%s'"), 4681 zc.zc_name); 4682 switch (errno) { 4683 case ENOMEM: 4684 free(nvbuf); 4685 nvsz = zc.zc_nvlist_dst_size; 4686 goto tryagain; 4687 4688 case ENOTSUP: 4689 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4690 "pool must be upgraded")); 4691 err = zfs_error(hdl, EZFS_BADVERSION, errbuf); 4692 break; 4693 case EINVAL: 4694 err = zfs_error(hdl, EZFS_BADTYPE, errbuf); 4695 break; 4696 case ENOENT: 4697 err = zfs_error(hdl, EZFS_NOENT, errbuf); 4698 break; 4699 default: 4700 err = zfs_standard_error_fmt(hdl, errno, errbuf); 4701 break; 4702 } 4703 } else { 4704 /* success */ 4705 int rc = nvlist_unpack(nvbuf, zc.zc_nvlist_dst_size, nvl, 0); 4706 if (rc) { 4707 (void) snprintf(errbuf, sizeof (errbuf), dgettext( 4708 TEXT_DOMAIN, "cannot get permissions on '%s'"), 4709 zc.zc_name); 4710 err = zfs_standard_error_fmt(hdl, rc, errbuf); 4711 } 4712 } 4713 4714 free(nvbuf); 4715out: 4716 return (err); 4717} 4718 4719int 4720zfs_set_fsacl(zfs_handle_t *zhp, boolean_t un, nvlist_t *nvl) 4721{ 4722 zfs_cmd_t zc = { 0 }; 4723 libzfs_handle_t *hdl = zhp->zfs_hdl; 4724 char *nvbuf; 4725 char errbuf[1024]; 4726 size_t nvsz; 4727 int err; 4728 4729 assert(zhp->zfs_type == ZFS_TYPE_VOLUME || 4730 zhp->zfs_type == ZFS_TYPE_FILESYSTEM); 4731 4732 err = nvlist_size(nvl, &nvsz, NV_ENCODE_NATIVE); 4733 assert(err == 0); 4734 4735 nvbuf = malloc(nvsz); 4736 4737 err = nvlist_pack(nvl, &nvbuf, &nvsz, NV_ENCODE_NATIVE, 0); 4738 assert(err == 0); 4739 4740 zc.zc_nvlist_src_size = nvsz; 4741 zc.zc_nvlist_src = (uintptr_t)nvbuf; 4742 zc.zc_perm_action = un; 4743 4744 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 4745 4746 if (zfs_ioctl(hdl, ZFS_IOC_SET_FSACL, &zc) != 0) { 4747 (void) snprintf(errbuf, sizeof (errbuf), 4748 dgettext(TEXT_DOMAIN, "cannot set permissions on '%s'"), 4749 zc.zc_name); 4750 switch (errno) { 4751 case ENOTSUP: 4752 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4753 "pool must be upgraded")); 4754 err = zfs_error(hdl, EZFS_BADVERSION, errbuf); 4755 break; 4756 case EINVAL: 4757 err = zfs_error(hdl, EZFS_BADTYPE, errbuf); 4758 break; 4759 case ENOENT: 4760 err = zfs_error(hdl, EZFS_NOENT, errbuf); 4761 break; 4762 default: 4763 err = zfs_standard_error_fmt(hdl, errno, errbuf); 4764 break; 4765 } 4766 } 4767 4768 free(nvbuf); 4769 4770 return (err); 4771} 4772 4773int 4774zfs_get_holds(zfs_handle_t *zhp, nvlist_t **nvl) 4775{ 4776 int err; 4777 char errbuf[1024]; 4778 4779 err = lzc_get_holds(zhp->zfs_name, nvl); 4780 4781 if (err != 0) { 4782 libzfs_handle_t *hdl = zhp->zfs_hdl; 4783 4784 (void) snprintf(errbuf, sizeof (errbuf), 4785 dgettext(TEXT_DOMAIN, "cannot get holds for '%s'"), 4786 zhp->zfs_name); 4787 switch (err) { 4788 case ENOTSUP: 4789 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4790 "pool must be upgraded")); 4791 err = zfs_error(hdl, EZFS_BADVERSION, errbuf); 4792 break; 4793 case EINVAL: 4794 err = zfs_error(hdl, EZFS_BADTYPE, errbuf); 4795 break; 4796 case ENOENT: 4797 err = zfs_error(hdl, EZFS_NOENT, errbuf); 4798 break; 4799 default: 4800 err = zfs_standard_error_fmt(hdl, errno, errbuf); 4801 break; 4802 } 4803 } 4804 4805 return (err); 4806} 4807 4808/* 4809 * Convert the zvol's volume size to an appropriate reservation. 4810 * Note: If this routine is updated, it is necessary to update the ZFS test 4811 * suite's shell version in reservation.kshlib. 4812 */ 4813uint64_t 4814zvol_volsize_to_reservation(uint64_t volsize, nvlist_t *props) 4815{ 4816 uint64_t numdb; 4817 uint64_t nblocks, volblocksize; 4818 int ncopies; 4819 char *strval; 4820 4821 if (nvlist_lookup_string(props, 4822 zfs_prop_to_name(ZFS_PROP_COPIES), &strval) == 0) 4823 ncopies = atoi(strval); 4824 else 4825 ncopies = 1; 4826 if (nvlist_lookup_uint64(props, 4827 zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE), 4828 &volblocksize) != 0) 4829 volblocksize = ZVOL_DEFAULT_BLOCKSIZE; 4830 nblocks = volsize/volblocksize; 4831 /* start with metadnode L0-L6 */ 4832 numdb = 7; 4833 /* calculate number of indirects */ 4834 while (nblocks > 1) { 4835 nblocks += DNODES_PER_LEVEL - 1; 4836 nblocks /= DNODES_PER_LEVEL; 4837 numdb += nblocks; 4838 } 4839 numdb *= MIN(SPA_DVAS_PER_BP, ncopies + 1); 4840 volsize *= ncopies; 4841 /* 4842 * this is exactly DN_MAX_INDBLKSHIFT when metadata isn't 4843 * compressed, but in practice they compress down to about 4844 * 1100 bytes 4845 */ 4846 numdb *= 1ULL << DN_MAX_INDBLKSHIFT; 4847 volsize += numdb; 4848 return (volsize); 4849} 4850 4851/* 4852 * Attach/detach the given filesystem to/from the given jail. 4853 */ 4854int 4855zfs_jail(zfs_handle_t *zhp, int jailid, int attach) 4856{ 4857 libzfs_handle_t *hdl = zhp->zfs_hdl; 4858 zfs_cmd_t zc = { 0 }; 4859 char errbuf[1024]; 4860 unsigned long cmd; 4861 int ret; 4862 4863 if (attach) { 4864 (void) snprintf(errbuf, sizeof (errbuf), 4865 dgettext(TEXT_DOMAIN, "cannot jail '%s'"), zhp->zfs_name); 4866 } else { 4867 (void) snprintf(errbuf, sizeof (errbuf), 4868 dgettext(TEXT_DOMAIN, "cannot unjail '%s'"), zhp->zfs_name); 4869 } 4870 4871 switch (zhp->zfs_type) { 4872 case ZFS_TYPE_VOLUME: 4873 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4874 "volumes can not be jailed")); 4875 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 4876 case ZFS_TYPE_SNAPSHOT: 4877 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4878 "snapshots can not be jailed")); 4879 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 4880 } 4881 assert(zhp->zfs_type == ZFS_TYPE_FILESYSTEM); 4882 4883 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 4884 zc.zc_objset_type = DMU_OST_ZFS; 4885 zc.zc_jailid = jailid; 4886 4887 cmd = attach ? ZFS_IOC_JAIL : ZFS_IOC_UNJAIL; 4888 if ((ret = ioctl(hdl->libzfs_fd, cmd, &zc)) != 0) 4889 zfs_standard_error(hdl, errno, errbuf); 4890 4891 return (ret); 4892} 4893