libzfs_dataset.c revision 307105
1/* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22/* 23 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 24 * Copyright (c) 2013, Joyent, Inc. All rights reserved. 25 * Copyright (c) 2011, 2015 by Delphix. All rights reserved. 26 * Copyright (c) 2012 DEY Storage Systems, Inc. All rights reserved. 27 * Copyright (c) 2011-2012 Pawel Jakub Dawidek. All rights reserved. 28 * Copyright (c) 2013 Martin Matuska. All rights reserved. 29 * Copyright (c) 2013 Steven Hartland. All rights reserved. 30 * Copyright 2013 Nexenta Systems, Inc. All rights reserved. 31 * Copyright (c) 2014 Integros [integros.com] 32 * Copyright 2016 Igor Kozhukhov <ikozhukhov@gmail.com> 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_MAXNAMELEN]; 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 E2BIG: 1473 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1474 "property value too long")); 1475 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1476 break; 1477 1478 case ENOTSUP: 1479 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1480 "pool and or dataset must be upgraded to set this " 1481 "property or value")); 1482 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf); 1483 break; 1484 1485 case ERANGE: 1486 case EDOM: 1487 if (prop == ZFS_PROP_COMPRESSION || 1488 prop == ZFS_PROP_RECORDSIZE) { 1489 (void) zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1490 "property setting is not allowed on " 1491 "bootable datasets")); 1492 (void) zfs_error(hdl, EZFS_NOTSUP, errbuf); 1493 } else if (prop == ZFS_PROP_CHECKSUM || 1494 prop == ZFS_PROP_DEDUP) { 1495 (void) zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1496 "property setting is not allowed on " 1497 "root pools")); 1498 (void) zfs_error(hdl, EZFS_NOTSUP, errbuf); 1499 } else { 1500 (void) zfs_standard_error(hdl, err, errbuf); 1501 } 1502 break; 1503 1504 case EINVAL: 1505 if (prop == ZPROP_INVAL) { 1506 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1507 } else { 1508 (void) zfs_standard_error(hdl, err, errbuf); 1509 } 1510 break; 1511 1512 case EOVERFLOW: 1513 /* 1514 * This platform can't address a volume this big. 1515 */ 1516#ifdef _ILP32 1517 if (prop == ZFS_PROP_VOLSIZE) { 1518 (void) zfs_error(hdl, EZFS_VOLTOOBIG, errbuf); 1519 break; 1520 } 1521#endif 1522 /* FALLTHROUGH */ 1523 default: 1524 (void) zfs_standard_error(hdl, err, errbuf); 1525 } 1526} 1527 1528/* 1529 * Given a property name and value, set the property for the given dataset. 1530 */ 1531int 1532zfs_prop_set(zfs_handle_t *zhp, const char *propname, const char *propval) 1533{ 1534 int ret = -1; 1535 char errbuf[1024]; 1536 libzfs_handle_t *hdl = zhp->zfs_hdl; 1537 nvlist_t *nvl = NULL; 1538 1539 (void) snprintf(errbuf, sizeof (errbuf), 1540 dgettext(TEXT_DOMAIN, "cannot set property for '%s'"), 1541 zhp->zfs_name); 1542 1543 if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0 || 1544 nvlist_add_string(nvl, propname, propval) != 0) { 1545 (void) no_memory(hdl); 1546 goto error; 1547 } 1548 1549 ret = zfs_prop_set_list(zhp, nvl); 1550 1551error: 1552 nvlist_free(nvl); 1553 return (ret); 1554} 1555 1556 1557 1558/* 1559 * Given an nvlist of property names and values, set the properties for the 1560 * given dataset. 1561 */ 1562int 1563zfs_prop_set_list(zfs_handle_t *zhp, nvlist_t *props) 1564{ 1565 zfs_cmd_t zc = { 0 }; 1566 int ret = -1; 1567 prop_changelist_t **cls = NULL; 1568 int cl_idx; 1569 char errbuf[1024]; 1570 libzfs_handle_t *hdl = zhp->zfs_hdl; 1571 nvlist_t *nvl; 1572 int nvl_len; 1573 int added_resv; 1574 1575 (void) snprintf(errbuf, sizeof (errbuf), 1576 dgettext(TEXT_DOMAIN, "cannot set property for '%s'"), 1577 zhp->zfs_name); 1578 1579 if ((nvl = zfs_valid_proplist(hdl, zhp->zfs_type, props, 1580 zfs_prop_get_int(zhp, ZFS_PROP_ZONED), zhp, zhp->zpool_hdl, 1581 errbuf)) == NULL) 1582 goto error; 1583 1584 /* 1585 * We have to check for any extra properties which need to be added 1586 * before computing the length of the nvlist. 1587 */ 1588 for (nvpair_t *elem = nvlist_next_nvpair(nvl, NULL); 1589 elem != NULL; 1590 elem = nvlist_next_nvpair(nvl, elem)) { 1591 if (zfs_name_to_prop(nvpair_name(elem)) == ZFS_PROP_VOLSIZE && 1592 (added_resv = zfs_add_synthetic_resv(zhp, nvl)) == -1) { 1593 goto error; 1594 } 1595 } 1596 /* 1597 * Check how many properties we're setting and allocate an array to 1598 * store changelist pointers for postfix(). 1599 */ 1600 nvl_len = 0; 1601 for (nvpair_t *elem = nvlist_next_nvpair(nvl, NULL); 1602 elem != NULL; 1603 elem = nvlist_next_nvpair(nvl, elem)) 1604 nvl_len++; 1605 if ((cls = calloc(nvl_len, sizeof (prop_changelist_t *))) == NULL) 1606 goto error; 1607 1608 cl_idx = 0; 1609 for (nvpair_t *elem = nvlist_next_nvpair(nvl, NULL); 1610 elem != NULL; 1611 elem = nvlist_next_nvpair(nvl, elem)) { 1612 1613 zfs_prop_t prop = zfs_name_to_prop(nvpair_name(elem)); 1614 1615 assert(cl_idx < nvl_len); 1616 /* 1617 * We don't want to unmount & remount the dataset when changing 1618 * its canmount property. We only use the changelist logic to 1619 * unmount when setting canmount=off for a mounted filesystem 1620 * or when setting canmount=on for an unmounted filesystem. 1621 * For all other changes to canmount property the filesystem 1622 * remains the same. 1623 */ 1624 if (prop != ZFS_PROP_CANMOUNT || 1625 (fnvpair_value_uint64(elem) == ZFS_CANMOUNT_OFF && 1626 zfs_is_mounted(zhp, NULL)) || 1627 (fnvpair_value_uint64(elem) == ZFS_CANMOUNT_ON && 1628 !zfs_is_mounted(zhp, NULL))) { 1629 cls[cl_idx] = changelist_gather(zhp, prop, 0, 0); 1630 if (cls[cl_idx] == NULL) 1631 goto error; 1632 } 1633 1634 if (prop == ZFS_PROP_MOUNTPOINT && 1635 changelist_haszonedchild(cls[cl_idx])) { 1636 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1637 "child dataset with inherited mountpoint is used " 1638 "in a non-global zone")); 1639 ret = zfs_error(hdl, EZFS_ZONED, errbuf); 1640 goto error; 1641 } 1642 1643 /* We don't support those properties on FreeBSD. */ 1644 switch (prop) { 1645 case ZFS_PROP_DEVICES: 1646 case ZFS_PROP_ISCSIOPTIONS: 1647 case ZFS_PROP_XATTR: 1648 case ZFS_PROP_VSCAN: 1649 case ZFS_PROP_NBMAND: 1650 case ZFS_PROP_MLSLABEL: 1651 (void) snprintf(errbuf, sizeof (errbuf), 1652 "property '%s' not supported on FreeBSD", 1653 nvpair_name(elem)); 1654 ret = zfs_error(hdl, EZFS_PERM, errbuf); 1655 goto error; 1656 } 1657 1658 if (cls[cl_idx] != NULL && 1659 (ret = changelist_prefix(cls[cl_idx])) != 0) 1660 goto error; 1661 1662 cl_idx++; 1663 } 1664 assert(cl_idx == nvl_len); 1665 1666 /* 1667 * Execute the corresponding ioctl() to set this list of properties. 1668 */ 1669 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 1670 1671 if ((ret = zcmd_write_src_nvlist(hdl, &zc, nvl)) != 0 || 1672 (ret = zcmd_alloc_dst_nvlist(hdl, &zc, 0)) != 0) 1673 goto error; 1674 1675 ret = zfs_ioctl(hdl, ZFS_IOC_SET_PROP, &zc); 1676 1677 if (ret != 0) { 1678 /* Get the list of unset properties back and report them. */ 1679 nvlist_t *errorprops = NULL; 1680 if (zcmd_read_dst_nvlist(hdl, &zc, &errorprops) != 0) 1681 goto error; 1682 for (nvpair_t *elem = nvlist_next_nvpair(nvl, NULL); 1683 elem != NULL; 1684 elem = nvlist_next_nvpair(nvl, elem)) { 1685 zfs_prop_t prop = zfs_name_to_prop(nvpair_name(elem)); 1686 zfs_setprop_error(hdl, prop, errno, errbuf); 1687 } 1688 nvlist_free(errorprops); 1689 1690 if (added_resv && errno == ENOSPC) { 1691 /* clean up the volsize property we tried to set */ 1692 uint64_t old_volsize = zfs_prop_get_int(zhp, 1693 ZFS_PROP_VOLSIZE); 1694 nvlist_free(nvl); 1695 nvl = NULL; 1696 zcmd_free_nvlists(&zc); 1697 1698 if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0) 1699 goto error; 1700 if (nvlist_add_uint64(nvl, 1701 zfs_prop_to_name(ZFS_PROP_VOLSIZE), 1702 old_volsize) != 0) 1703 goto error; 1704 if (zcmd_write_src_nvlist(hdl, &zc, nvl) != 0) 1705 goto error; 1706 (void) zfs_ioctl(hdl, ZFS_IOC_SET_PROP, &zc); 1707 } 1708 } else { 1709 for (cl_idx = 0; cl_idx < nvl_len; cl_idx++) { 1710 if (cls[cl_idx] != NULL) { 1711 int clp_err = changelist_postfix(cls[cl_idx]); 1712 if (clp_err != 0) 1713 ret = clp_err; 1714 } 1715 } 1716 1717 /* 1718 * Refresh the statistics so the new property value 1719 * is reflected. 1720 */ 1721 if (ret == 0) 1722 (void) get_stats(zhp); 1723 } 1724 1725error: 1726 nvlist_free(nvl); 1727 zcmd_free_nvlists(&zc); 1728 if (cls != NULL) { 1729 for (cl_idx = 0; cl_idx < nvl_len; cl_idx++) { 1730 if (cls[cl_idx] != NULL) 1731 changelist_free(cls[cl_idx]); 1732 } 1733 free(cls); 1734 } 1735 return (ret); 1736} 1737 1738/* 1739 * Given a property, inherit the value from the parent dataset, or if received 1740 * is TRUE, revert to the received value, if any. 1741 */ 1742int 1743zfs_prop_inherit(zfs_handle_t *zhp, const char *propname, boolean_t received) 1744{ 1745 zfs_cmd_t zc = { 0 }; 1746 int ret; 1747 prop_changelist_t *cl; 1748 libzfs_handle_t *hdl = zhp->zfs_hdl; 1749 char errbuf[1024]; 1750 zfs_prop_t prop; 1751 1752 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 1753 "cannot inherit %s for '%s'"), propname, zhp->zfs_name); 1754 1755 zc.zc_cookie = received; 1756 if ((prop = zfs_name_to_prop(propname)) == ZPROP_INVAL) { 1757 /* 1758 * For user properties, the amount of work we have to do is very 1759 * small, so just do it here. 1760 */ 1761 if (!zfs_prop_user(propname)) { 1762 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1763 "invalid property")); 1764 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 1765 } 1766 1767 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 1768 (void) strlcpy(zc.zc_value, propname, sizeof (zc.zc_value)); 1769 1770 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_INHERIT_PROP, &zc) != 0) 1771 return (zfs_standard_error(hdl, errno, errbuf)); 1772 1773 return (0); 1774 } 1775 1776 /* 1777 * Verify that this property is inheritable. 1778 */ 1779 if (zfs_prop_readonly(prop)) 1780 return (zfs_error(hdl, EZFS_PROPREADONLY, errbuf)); 1781 1782 if (!zfs_prop_inheritable(prop) && !received) 1783 return (zfs_error(hdl, EZFS_PROPNONINHERIT, errbuf)); 1784 1785 /* 1786 * Check to see if the value applies to this type 1787 */ 1788 if (!zfs_prop_valid_for_type(prop, zhp->zfs_type)) 1789 return (zfs_error(hdl, EZFS_PROPTYPE, errbuf)); 1790 1791 /* 1792 * Normalize the name, to get rid of shorthand abbreviations. 1793 */ 1794 propname = zfs_prop_to_name(prop); 1795 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 1796 (void) strlcpy(zc.zc_value, propname, sizeof (zc.zc_value)); 1797 1798 if (prop == ZFS_PROP_MOUNTPOINT && getzoneid() == GLOBAL_ZONEID && 1799 zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) { 1800 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1801 "dataset is used in a non-global zone")); 1802 return (zfs_error(hdl, EZFS_ZONED, errbuf)); 1803 } 1804 1805 /* 1806 * Determine datasets which will be affected by this change, if any. 1807 */ 1808 if ((cl = changelist_gather(zhp, prop, 0, 0)) == NULL) 1809 return (-1); 1810 1811 if (prop == ZFS_PROP_MOUNTPOINT && changelist_haszonedchild(cl)) { 1812 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1813 "child dataset with inherited mountpoint is used " 1814 "in a non-global zone")); 1815 ret = zfs_error(hdl, EZFS_ZONED, errbuf); 1816 goto error; 1817 } 1818 1819 if ((ret = changelist_prefix(cl)) != 0) 1820 goto error; 1821 1822 if ((ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_INHERIT_PROP, &zc)) != 0) { 1823 return (zfs_standard_error(hdl, errno, errbuf)); 1824 } else { 1825 1826 if ((ret = changelist_postfix(cl)) != 0) 1827 goto error; 1828 1829 /* 1830 * Refresh the statistics so the new property is reflected. 1831 */ 1832 (void) get_stats(zhp); 1833 } 1834 1835error: 1836 changelist_free(cl); 1837 return (ret); 1838} 1839 1840/* 1841 * True DSL properties are stored in an nvlist. The following two functions 1842 * extract them appropriately. 1843 */ 1844static uint64_t 1845getprop_uint64(zfs_handle_t *zhp, zfs_prop_t prop, char **source) 1846{ 1847 nvlist_t *nv; 1848 uint64_t value; 1849 1850 *source = NULL; 1851 if (nvlist_lookup_nvlist(zhp->zfs_props, 1852 zfs_prop_to_name(prop), &nv) == 0) { 1853 verify(nvlist_lookup_uint64(nv, ZPROP_VALUE, &value) == 0); 1854 (void) nvlist_lookup_string(nv, ZPROP_SOURCE, source); 1855 } else { 1856 verify(!zhp->zfs_props_table || 1857 zhp->zfs_props_table[prop] == B_TRUE); 1858 value = zfs_prop_default_numeric(prop); 1859 *source = ""; 1860 } 1861 1862 return (value); 1863} 1864 1865static const char * 1866getprop_string(zfs_handle_t *zhp, zfs_prop_t prop, char **source) 1867{ 1868 nvlist_t *nv; 1869 const char *value; 1870 1871 *source = NULL; 1872 if (nvlist_lookup_nvlist(zhp->zfs_props, 1873 zfs_prop_to_name(prop), &nv) == 0) { 1874 value = fnvlist_lookup_string(nv, ZPROP_VALUE); 1875 (void) nvlist_lookup_string(nv, ZPROP_SOURCE, source); 1876 } else { 1877 verify(!zhp->zfs_props_table || 1878 zhp->zfs_props_table[prop] == B_TRUE); 1879 value = zfs_prop_default_string(prop); 1880 *source = ""; 1881 } 1882 1883 return (value); 1884} 1885 1886static boolean_t 1887zfs_is_recvd_props_mode(zfs_handle_t *zhp) 1888{ 1889 return (zhp->zfs_props == zhp->zfs_recvd_props); 1890} 1891 1892static void 1893zfs_set_recvd_props_mode(zfs_handle_t *zhp, uint64_t *cookie) 1894{ 1895 *cookie = (uint64_t)(uintptr_t)zhp->zfs_props; 1896 zhp->zfs_props = zhp->zfs_recvd_props; 1897} 1898 1899static void 1900zfs_unset_recvd_props_mode(zfs_handle_t *zhp, uint64_t *cookie) 1901{ 1902 zhp->zfs_props = (nvlist_t *)(uintptr_t)*cookie; 1903 *cookie = 0; 1904} 1905 1906/* 1907 * Internal function for getting a numeric property. Both zfs_prop_get() and 1908 * zfs_prop_get_int() are built using this interface. 1909 * 1910 * Certain properties can be overridden using 'mount -o'. In this case, scan 1911 * the contents of the /etc/mnttab entry, searching for the appropriate options. 1912 * If they differ from the on-disk values, report the current values and mark 1913 * the source "temporary". 1914 */ 1915static int 1916get_numeric_property(zfs_handle_t *zhp, zfs_prop_t prop, zprop_source_t *src, 1917 char **source, uint64_t *val) 1918{ 1919 zfs_cmd_t zc = { 0 }; 1920 nvlist_t *zplprops = NULL; 1921 struct mnttab mnt; 1922 char *mntopt_on = NULL; 1923 char *mntopt_off = NULL; 1924 boolean_t received = zfs_is_recvd_props_mode(zhp); 1925 1926 *source = NULL; 1927 1928 switch (prop) { 1929 case ZFS_PROP_ATIME: 1930 mntopt_on = MNTOPT_ATIME; 1931 mntopt_off = MNTOPT_NOATIME; 1932 break; 1933 1934 case ZFS_PROP_DEVICES: 1935 mntopt_on = MNTOPT_DEVICES; 1936 mntopt_off = MNTOPT_NODEVICES; 1937 break; 1938 1939 case ZFS_PROP_EXEC: 1940 mntopt_on = MNTOPT_EXEC; 1941 mntopt_off = MNTOPT_NOEXEC; 1942 break; 1943 1944 case ZFS_PROP_READONLY: 1945 mntopt_on = MNTOPT_RO; 1946 mntopt_off = MNTOPT_RW; 1947 break; 1948 1949 case ZFS_PROP_SETUID: 1950 mntopt_on = MNTOPT_SETUID; 1951 mntopt_off = MNTOPT_NOSETUID; 1952 break; 1953 1954 case ZFS_PROP_XATTR: 1955 mntopt_on = MNTOPT_XATTR; 1956 mntopt_off = MNTOPT_NOXATTR; 1957 break; 1958 1959 case ZFS_PROP_NBMAND: 1960 mntopt_on = MNTOPT_NBMAND; 1961 mntopt_off = MNTOPT_NONBMAND; 1962 break; 1963 1964 default: 1965 break; 1966 } 1967 1968 /* 1969 * Because looking up the mount options is potentially expensive 1970 * (iterating over all of /etc/mnttab), we defer its calculation until 1971 * we're looking up a property which requires its presence. 1972 */ 1973 if (!zhp->zfs_mntcheck && 1974 (mntopt_on != NULL || prop == ZFS_PROP_MOUNTED)) { 1975 libzfs_handle_t *hdl = zhp->zfs_hdl; 1976 struct mnttab entry; 1977 1978 if (libzfs_mnttab_find(hdl, zhp->zfs_name, &entry) == 0) { 1979 zhp->zfs_mntopts = zfs_strdup(hdl, 1980 entry.mnt_mntopts); 1981 if (zhp->zfs_mntopts == NULL) 1982 return (-1); 1983 } 1984 1985 zhp->zfs_mntcheck = B_TRUE; 1986 } 1987 1988 if (zhp->zfs_mntopts == NULL) 1989 mnt.mnt_mntopts = ""; 1990 else 1991 mnt.mnt_mntopts = zhp->zfs_mntopts; 1992 1993 switch (prop) { 1994 case ZFS_PROP_ATIME: 1995 case ZFS_PROP_DEVICES: 1996 case ZFS_PROP_EXEC: 1997 case ZFS_PROP_READONLY: 1998 case ZFS_PROP_SETUID: 1999 case ZFS_PROP_XATTR: 2000 case ZFS_PROP_NBMAND: 2001 *val = getprop_uint64(zhp, prop, source); 2002 2003 if (received) 2004 break; 2005 2006 if (hasmntopt(&mnt, mntopt_on) && !*val) { 2007 *val = B_TRUE; 2008 if (src) 2009 *src = ZPROP_SRC_TEMPORARY; 2010 } else if (hasmntopt(&mnt, mntopt_off) && *val) { 2011 *val = B_FALSE; 2012 if (src) 2013 *src = ZPROP_SRC_TEMPORARY; 2014 } 2015 break; 2016 2017 case ZFS_PROP_CANMOUNT: 2018 case ZFS_PROP_VOLSIZE: 2019 case ZFS_PROP_QUOTA: 2020 case ZFS_PROP_REFQUOTA: 2021 case ZFS_PROP_RESERVATION: 2022 case ZFS_PROP_REFRESERVATION: 2023 case ZFS_PROP_FILESYSTEM_LIMIT: 2024 case ZFS_PROP_SNAPSHOT_LIMIT: 2025 case ZFS_PROP_FILESYSTEM_COUNT: 2026 case ZFS_PROP_SNAPSHOT_COUNT: 2027 *val = getprop_uint64(zhp, prop, source); 2028 2029 if (*source == NULL) { 2030 /* not default, must be local */ 2031 *source = zhp->zfs_name; 2032 } 2033 break; 2034 2035 case ZFS_PROP_MOUNTED: 2036 *val = (zhp->zfs_mntopts != NULL); 2037 break; 2038 2039 case ZFS_PROP_NUMCLONES: 2040 *val = zhp->zfs_dmustats.dds_num_clones; 2041 break; 2042 2043 case ZFS_PROP_VERSION: 2044 case ZFS_PROP_NORMALIZE: 2045 case ZFS_PROP_UTF8ONLY: 2046 case ZFS_PROP_CASE: 2047 if (!zfs_prop_valid_for_type(prop, zhp->zfs_head_type) || 2048 zcmd_alloc_dst_nvlist(zhp->zfs_hdl, &zc, 0) != 0) 2049 return (-1); 2050 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 2051 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_OBJSET_ZPLPROPS, &zc)) { 2052 zcmd_free_nvlists(&zc); 2053 return (-1); 2054 } 2055 if (zcmd_read_dst_nvlist(zhp->zfs_hdl, &zc, &zplprops) != 0 || 2056 nvlist_lookup_uint64(zplprops, zfs_prop_to_name(prop), 2057 val) != 0) { 2058 zcmd_free_nvlists(&zc); 2059 return (-1); 2060 } 2061 nvlist_free(zplprops); 2062 zcmd_free_nvlists(&zc); 2063 break; 2064 2065 case ZFS_PROP_INCONSISTENT: 2066 *val = zhp->zfs_dmustats.dds_inconsistent; 2067 break; 2068 2069 default: 2070 switch (zfs_prop_get_type(prop)) { 2071 case PROP_TYPE_NUMBER: 2072 case PROP_TYPE_INDEX: 2073 *val = getprop_uint64(zhp, prop, source); 2074 /* 2075 * If we tried to use a default value for a 2076 * readonly property, it means that it was not 2077 * present. 2078 */ 2079 if (zfs_prop_readonly(prop) && 2080 *source != NULL && (*source)[0] == '\0') { 2081 *source = NULL; 2082 } 2083 break; 2084 2085 case PROP_TYPE_STRING: 2086 default: 2087 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN, 2088 "cannot get non-numeric property")); 2089 return (zfs_error(zhp->zfs_hdl, EZFS_BADPROP, 2090 dgettext(TEXT_DOMAIN, "internal error"))); 2091 } 2092 } 2093 2094 return (0); 2095} 2096 2097/* 2098 * Calculate the source type, given the raw source string. 2099 */ 2100static void 2101get_source(zfs_handle_t *zhp, zprop_source_t *srctype, char *source, 2102 char *statbuf, size_t statlen) 2103{ 2104 if (statbuf == NULL || *srctype == ZPROP_SRC_TEMPORARY) 2105 return; 2106 2107 if (source == NULL) { 2108 *srctype = ZPROP_SRC_NONE; 2109 } else if (source[0] == '\0') { 2110 *srctype = ZPROP_SRC_DEFAULT; 2111 } else if (strstr(source, ZPROP_SOURCE_VAL_RECVD) != NULL) { 2112 *srctype = ZPROP_SRC_RECEIVED; 2113 } else { 2114 if (strcmp(source, zhp->zfs_name) == 0) { 2115 *srctype = ZPROP_SRC_LOCAL; 2116 } else { 2117 (void) strlcpy(statbuf, source, statlen); 2118 *srctype = ZPROP_SRC_INHERITED; 2119 } 2120 } 2121 2122} 2123 2124int 2125zfs_prop_get_recvd(zfs_handle_t *zhp, const char *propname, char *propbuf, 2126 size_t proplen, boolean_t literal) 2127{ 2128 zfs_prop_t prop; 2129 int err = 0; 2130 2131 if (zhp->zfs_recvd_props == NULL) 2132 if (get_recvd_props_ioctl(zhp) != 0) 2133 return (-1); 2134 2135 prop = zfs_name_to_prop(propname); 2136 2137 if (prop != ZPROP_INVAL) { 2138 uint64_t cookie; 2139 if (!nvlist_exists(zhp->zfs_recvd_props, propname)) 2140 return (-1); 2141 zfs_set_recvd_props_mode(zhp, &cookie); 2142 err = zfs_prop_get(zhp, prop, propbuf, proplen, 2143 NULL, NULL, 0, literal); 2144 zfs_unset_recvd_props_mode(zhp, &cookie); 2145 } else { 2146 nvlist_t *propval; 2147 char *recvdval; 2148 if (nvlist_lookup_nvlist(zhp->zfs_recvd_props, 2149 propname, &propval) != 0) 2150 return (-1); 2151 verify(nvlist_lookup_string(propval, ZPROP_VALUE, 2152 &recvdval) == 0); 2153 (void) strlcpy(propbuf, recvdval, proplen); 2154 } 2155 2156 return (err == 0 ? 0 : -1); 2157} 2158 2159static int 2160get_clones_string(zfs_handle_t *zhp, char *propbuf, size_t proplen) 2161{ 2162 nvlist_t *value; 2163 nvpair_t *pair; 2164 2165 value = zfs_get_clones_nvl(zhp); 2166 if (value == NULL) 2167 return (-1); 2168 2169 propbuf[0] = '\0'; 2170 for (pair = nvlist_next_nvpair(value, NULL); pair != NULL; 2171 pair = nvlist_next_nvpair(value, pair)) { 2172 if (propbuf[0] != '\0') 2173 (void) strlcat(propbuf, ",", proplen); 2174 (void) strlcat(propbuf, nvpair_name(pair), proplen); 2175 } 2176 2177 return (0); 2178} 2179 2180struct get_clones_arg { 2181 uint64_t numclones; 2182 nvlist_t *value; 2183 const char *origin; 2184 char buf[ZFS_MAXNAMELEN]; 2185}; 2186 2187int 2188get_clones_cb(zfs_handle_t *zhp, void *arg) 2189{ 2190 struct get_clones_arg *gca = arg; 2191 2192 if (gca->numclones == 0) { 2193 zfs_close(zhp); 2194 return (0); 2195 } 2196 2197 if (zfs_prop_get(zhp, ZFS_PROP_ORIGIN, gca->buf, sizeof (gca->buf), 2198 NULL, NULL, 0, B_TRUE) != 0) 2199 goto out; 2200 if (strcmp(gca->buf, gca->origin) == 0) { 2201 fnvlist_add_boolean(gca->value, zfs_get_name(zhp)); 2202 gca->numclones--; 2203 } 2204 2205out: 2206 (void) zfs_iter_children(zhp, get_clones_cb, gca); 2207 zfs_close(zhp); 2208 return (0); 2209} 2210 2211nvlist_t * 2212zfs_get_clones_nvl(zfs_handle_t *zhp) 2213{ 2214 nvlist_t *nv, *value; 2215 2216 if (nvlist_lookup_nvlist(zhp->zfs_props, 2217 zfs_prop_to_name(ZFS_PROP_CLONES), &nv) != 0) { 2218 struct get_clones_arg gca; 2219 2220 /* 2221 * if this is a snapshot, then the kernel wasn't able 2222 * to get the clones. Do it by slowly iterating. 2223 */ 2224 if (zhp->zfs_type != ZFS_TYPE_SNAPSHOT) 2225 return (NULL); 2226 if (nvlist_alloc(&nv, NV_UNIQUE_NAME, 0) != 0) 2227 return (NULL); 2228 if (nvlist_alloc(&value, NV_UNIQUE_NAME, 0) != 0) { 2229 nvlist_free(nv); 2230 return (NULL); 2231 } 2232 2233 gca.numclones = zfs_prop_get_int(zhp, ZFS_PROP_NUMCLONES); 2234 gca.value = value; 2235 gca.origin = zhp->zfs_name; 2236 2237 if (gca.numclones != 0) { 2238 zfs_handle_t *root; 2239 char pool[ZFS_MAXNAMELEN]; 2240 char *cp = pool; 2241 2242 /* get the pool name */ 2243 (void) strlcpy(pool, zhp->zfs_name, sizeof (pool)); 2244 (void) strsep(&cp, "/@"); 2245 root = zfs_open(zhp->zfs_hdl, pool, 2246 ZFS_TYPE_FILESYSTEM); 2247 2248 (void) get_clones_cb(root, &gca); 2249 } 2250 2251 if (gca.numclones != 0 || 2252 nvlist_add_nvlist(nv, ZPROP_VALUE, value) != 0 || 2253 nvlist_add_nvlist(zhp->zfs_props, 2254 zfs_prop_to_name(ZFS_PROP_CLONES), nv) != 0) { 2255 nvlist_free(nv); 2256 nvlist_free(value); 2257 return (NULL); 2258 } 2259 nvlist_free(nv); 2260 nvlist_free(value); 2261 verify(0 == nvlist_lookup_nvlist(zhp->zfs_props, 2262 zfs_prop_to_name(ZFS_PROP_CLONES), &nv)); 2263 } 2264 2265 verify(nvlist_lookup_nvlist(nv, ZPROP_VALUE, &value) == 0); 2266 2267 return (value); 2268} 2269 2270/* 2271 * Retrieve a property from the given object. If 'literal' is specified, then 2272 * numbers are left as exact values. Otherwise, numbers are converted to a 2273 * human-readable form. 2274 * 2275 * Returns 0 on success, or -1 on error. 2276 */ 2277int 2278zfs_prop_get(zfs_handle_t *zhp, zfs_prop_t prop, char *propbuf, size_t proplen, 2279 zprop_source_t *src, char *statbuf, size_t statlen, boolean_t literal) 2280{ 2281 char *source = NULL; 2282 uint64_t val; 2283 const char *str; 2284 const char *strval; 2285 boolean_t received = zfs_is_recvd_props_mode(zhp); 2286 2287 /* 2288 * Check to see if this property applies to our object 2289 */ 2290 if (!zfs_prop_valid_for_type(prop, zhp->zfs_type)) 2291 return (-1); 2292 2293 if (received && zfs_prop_readonly(prop)) 2294 return (-1); 2295 2296 if (src) 2297 *src = ZPROP_SRC_NONE; 2298 2299 switch (prop) { 2300 case ZFS_PROP_CREATION: 2301 /* 2302 * 'creation' is a time_t stored in the statistics. We convert 2303 * this into a string unless 'literal' is specified. 2304 */ 2305 { 2306 val = getprop_uint64(zhp, prop, &source); 2307 time_t time = (time_t)val; 2308 struct tm t; 2309 2310 if (literal || 2311 localtime_r(&time, &t) == NULL || 2312 strftime(propbuf, proplen, "%a %b %e %k:%M %Y", 2313 &t) == 0) 2314 (void) snprintf(propbuf, proplen, "%llu", val); 2315 } 2316 break; 2317 2318 case ZFS_PROP_MOUNTPOINT: 2319 /* 2320 * Getting the precise mountpoint can be tricky. 2321 * 2322 * - for 'none' or 'legacy', return those values. 2323 * - for inherited mountpoints, we want to take everything 2324 * after our ancestor and append it to the inherited value. 2325 * 2326 * If the pool has an alternate root, we want to prepend that 2327 * root to any values we return. 2328 */ 2329 2330 str = getprop_string(zhp, prop, &source); 2331 2332 if (str[0] == '/') { 2333 char buf[MAXPATHLEN]; 2334 char *root = buf; 2335 const char *relpath; 2336 2337 /* 2338 * If we inherit the mountpoint, even from a dataset 2339 * with a received value, the source will be the path of 2340 * the dataset we inherit from. If source is 2341 * ZPROP_SOURCE_VAL_RECVD, the received value is not 2342 * inherited. 2343 */ 2344 if (strcmp(source, ZPROP_SOURCE_VAL_RECVD) == 0) { 2345 relpath = ""; 2346 } else { 2347 relpath = zhp->zfs_name + strlen(source); 2348 if (relpath[0] == '/') 2349 relpath++; 2350 } 2351 2352 if ((zpool_get_prop(zhp->zpool_hdl, 2353 ZPOOL_PROP_ALTROOT, buf, MAXPATHLEN, NULL, 2354 B_FALSE)) || (strcmp(root, "-") == 0)) 2355 root[0] = '\0'; 2356 /* 2357 * Special case an alternate root of '/'. This will 2358 * avoid having multiple leading slashes in the 2359 * mountpoint path. 2360 */ 2361 if (strcmp(root, "/") == 0) 2362 root++; 2363 2364 /* 2365 * If the mountpoint is '/' then skip over this 2366 * if we are obtaining either an alternate root or 2367 * an inherited mountpoint. 2368 */ 2369 if (str[1] == '\0' && (root[0] != '\0' || 2370 relpath[0] != '\0')) 2371 str++; 2372 2373 if (relpath[0] == '\0') 2374 (void) snprintf(propbuf, proplen, "%s%s", 2375 root, str); 2376 else 2377 (void) snprintf(propbuf, proplen, "%s%s%s%s", 2378 root, str, relpath[0] == '@' ? "" : "/", 2379 relpath); 2380 } else { 2381 /* 'legacy' or 'none' */ 2382 (void) strlcpy(propbuf, str, proplen); 2383 } 2384 2385 break; 2386 2387 case ZFS_PROP_ORIGIN: 2388 str = getprop_string(zhp, prop, &source); 2389 if (str == NULL) 2390 return (-1); 2391 (void) strlcpy(propbuf, str, proplen); 2392 break; 2393 2394 case ZFS_PROP_CLONES: 2395 if (get_clones_string(zhp, propbuf, proplen) != 0) 2396 return (-1); 2397 break; 2398 2399 case ZFS_PROP_QUOTA: 2400 case ZFS_PROP_REFQUOTA: 2401 case ZFS_PROP_RESERVATION: 2402 case ZFS_PROP_REFRESERVATION: 2403 2404 if (get_numeric_property(zhp, prop, src, &source, &val) != 0) 2405 return (-1); 2406 2407 /* 2408 * If quota or reservation is 0, we translate this into 'none' 2409 * (unless literal is set), and indicate that it's the default 2410 * value. Otherwise, we print the number nicely and indicate 2411 * that its set locally. 2412 */ 2413 if (val == 0) { 2414 if (literal) 2415 (void) strlcpy(propbuf, "0", proplen); 2416 else 2417 (void) strlcpy(propbuf, "none", proplen); 2418 } else { 2419 if (literal) 2420 (void) snprintf(propbuf, proplen, "%llu", 2421 (u_longlong_t)val); 2422 else 2423 zfs_nicenum(val, propbuf, proplen); 2424 } 2425 break; 2426 2427 case ZFS_PROP_FILESYSTEM_LIMIT: 2428 case ZFS_PROP_SNAPSHOT_LIMIT: 2429 case ZFS_PROP_FILESYSTEM_COUNT: 2430 case ZFS_PROP_SNAPSHOT_COUNT: 2431 2432 if (get_numeric_property(zhp, prop, src, &source, &val) != 0) 2433 return (-1); 2434 2435 /* 2436 * If limit is UINT64_MAX, we translate this into 'none' (unless 2437 * literal is set), and indicate that it's the default value. 2438 * Otherwise, we print the number nicely and indicate that it's 2439 * set locally. 2440 */ 2441 if (literal) { 2442 (void) snprintf(propbuf, proplen, "%llu", 2443 (u_longlong_t)val); 2444 } else if (val == UINT64_MAX) { 2445 (void) strlcpy(propbuf, "none", proplen); 2446 } else { 2447 zfs_nicenum(val, propbuf, proplen); 2448 } 2449 break; 2450 2451 case ZFS_PROP_REFRATIO: 2452 case ZFS_PROP_COMPRESSRATIO: 2453 if (get_numeric_property(zhp, prop, src, &source, &val) != 0) 2454 return (-1); 2455 (void) snprintf(propbuf, proplen, "%llu.%02llux", 2456 (u_longlong_t)(val / 100), 2457 (u_longlong_t)(val % 100)); 2458 break; 2459 2460 case ZFS_PROP_TYPE: 2461 switch (zhp->zfs_type) { 2462 case ZFS_TYPE_FILESYSTEM: 2463 str = "filesystem"; 2464 break; 2465 case ZFS_TYPE_VOLUME: 2466 str = "volume"; 2467 break; 2468 case ZFS_TYPE_SNAPSHOT: 2469 str = "snapshot"; 2470 break; 2471 case ZFS_TYPE_BOOKMARK: 2472 str = "bookmark"; 2473 break; 2474 default: 2475 abort(); 2476 } 2477 (void) snprintf(propbuf, proplen, "%s", str); 2478 break; 2479 2480 case ZFS_PROP_MOUNTED: 2481 /* 2482 * The 'mounted' property is a pseudo-property that described 2483 * whether the filesystem is currently mounted. Even though 2484 * it's a boolean value, the typical values of "on" and "off" 2485 * don't make sense, so we translate to "yes" and "no". 2486 */ 2487 if (get_numeric_property(zhp, ZFS_PROP_MOUNTED, 2488 src, &source, &val) != 0) 2489 return (-1); 2490 if (val) 2491 (void) strlcpy(propbuf, "yes", proplen); 2492 else 2493 (void) strlcpy(propbuf, "no", proplen); 2494 break; 2495 2496 case ZFS_PROP_NAME: 2497 /* 2498 * The 'name' property is a pseudo-property derived from the 2499 * dataset name. It is presented as a real property to simplify 2500 * consumers. 2501 */ 2502 (void) strlcpy(propbuf, zhp->zfs_name, proplen); 2503 break; 2504 2505 case ZFS_PROP_MLSLABEL: 2506 { 2507#ifdef illumos 2508 m_label_t *new_sl = NULL; 2509 char *ascii = NULL; /* human readable label */ 2510 2511 (void) strlcpy(propbuf, 2512 getprop_string(zhp, prop, &source), proplen); 2513 2514 if (literal || (strcasecmp(propbuf, 2515 ZFS_MLSLABEL_DEFAULT) == 0)) 2516 break; 2517 2518 /* 2519 * Try to translate the internal hex string to 2520 * human-readable output. If there are any 2521 * problems just use the hex string. 2522 */ 2523 2524 if (str_to_label(propbuf, &new_sl, MAC_LABEL, 2525 L_NO_CORRECTION, NULL) == -1) { 2526 m_label_free(new_sl); 2527 break; 2528 } 2529 2530 if (label_to_str(new_sl, &ascii, M_LABEL, 2531 DEF_NAMES) != 0) { 2532 if (ascii) 2533 free(ascii); 2534 m_label_free(new_sl); 2535 break; 2536 } 2537 m_label_free(new_sl); 2538 2539 (void) strlcpy(propbuf, ascii, proplen); 2540 free(ascii); 2541#else /* !illumos */ 2542 propbuf[0] = '\0'; 2543#endif /* illumos */ 2544 } 2545 break; 2546 2547 case ZFS_PROP_GUID: 2548 /* 2549 * GUIDs are stored as numbers, but they are identifiers. 2550 * We don't want them to be pretty printed, because pretty 2551 * printing mangles the ID into a truncated and useless value. 2552 */ 2553 if (get_numeric_property(zhp, prop, src, &source, &val) != 0) 2554 return (-1); 2555 (void) snprintf(propbuf, proplen, "%llu", (u_longlong_t)val); 2556 break; 2557 2558 default: 2559 switch (zfs_prop_get_type(prop)) { 2560 case PROP_TYPE_NUMBER: 2561 if (get_numeric_property(zhp, prop, src, 2562 &source, &val) != 0) 2563 return (-1); 2564 if (literal) 2565 (void) snprintf(propbuf, proplen, "%llu", 2566 (u_longlong_t)val); 2567 else 2568 zfs_nicenum(val, propbuf, proplen); 2569 break; 2570 2571 case PROP_TYPE_STRING: 2572 str = getprop_string(zhp, prop, &source); 2573 if (str == NULL) 2574 return (-1); 2575 (void) strlcpy(propbuf, str, proplen); 2576 break; 2577 2578 case PROP_TYPE_INDEX: 2579 if (get_numeric_property(zhp, prop, src, 2580 &source, &val) != 0) 2581 return (-1); 2582 if (zfs_prop_index_to_string(prop, val, &strval) != 0) 2583 return (-1); 2584 (void) strlcpy(propbuf, strval, proplen); 2585 break; 2586 2587 default: 2588 abort(); 2589 } 2590 } 2591 2592 get_source(zhp, src, source, statbuf, statlen); 2593 2594 return (0); 2595} 2596 2597/* 2598 * Utility function to get the given numeric property. Does no validation that 2599 * the given property is the appropriate type; should only be used with 2600 * hard-coded property types. 2601 */ 2602uint64_t 2603zfs_prop_get_int(zfs_handle_t *zhp, zfs_prop_t prop) 2604{ 2605 char *source; 2606 uint64_t val; 2607 2608 (void) get_numeric_property(zhp, prop, NULL, &source, &val); 2609 2610 return (val); 2611} 2612 2613int 2614zfs_prop_set_int(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t val) 2615{ 2616 char buf[64]; 2617 2618 (void) snprintf(buf, sizeof (buf), "%llu", (longlong_t)val); 2619 return (zfs_prop_set(zhp, zfs_prop_to_name(prop), buf)); 2620} 2621 2622/* 2623 * Similar to zfs_prop_get(), but returns the value as an integer. 2624 */ 2625int 2626zfs_prop_get_numeric(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t *value, 2627 zprop_source_t *src, char *statbuf, size_t statlen) 2628{ 2629 char *source; 2630 2631 /* 2632 * Check to see if this property applies to our object 2633 */ 2634 if (!zfs_prop_valid_for_type(prop, zhp->zfs_type)) { 2635 return (zfs_error_fmt(zhp->zfs_hdl, EZFS_PROPTYPE, 2636 dgettext(TEXT_DOMAIN, "cannot get property '%s'"), 2637 zfs_prop_to_name(prop))); 2638 } 2639 2640 if (src) 2641 *src = ZPROP_SRC_NONE; 2642 2643 if (get_numeric_property(zhp, prop, src, &source, value) != 0) 2644 return (-1); 2645 2646 get_source(zhp, src, source, statbuf, statlen); 2647 2648 return (0); 2649} 2650 2651static int 2652idmap_id_to_numeric_domain_rid(uid_t id, boolean_t isuser, 2653 char **domainp, idmap_rid_t *ridp) 2654{ 2655#ifdef illumos 2656 idmap_get_handle_t *get_hdl = NULL; 2657 idmap_stat status; 2658 int err = EINVAL; 2659 2660 if (idmap_get_create(&get_hdl) != IDMAP_SUCCESS) 2661 goto out; 2662 2663 if (isuser) { 2664 err = idmap_get_sidbyuid(get_hdl, id, 2665 IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status); 2666 } else { 2667 err = idmap_get_sidbygid(get_hdl, id, 2668 IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status); 2669 } 2670 if (err == IDMAP_SUCCESS && 2671 idmap_get_mappings(get_hdl) == IDMAP_SUCCESS && 2672 status == IDMAP_SUCCESS) 2673 err = 0; 2674 else 2675 err = EINVAL; 2676out: 2677 if (get_hdl) 2678 idmap_get_destroy(get_hdl); 2679 return (err); 2680#else /* !illumos */ 2681 assert(!"invalid code path"); 2682 return (EINVAL); // silence compiler warning 2683#endif /* illumos */ 2684} 2685 2686/* 2687 * convert the propname into parameters needed by kernel 2688 * Eg: userquota@ahrens -> ZFS_PROP_USERQUOTA, "", 126829 2689 * Eg: userused@matt@domain -> ZFS_PROP_USERUSED, "S-1-123-456", 789 2690 */ 2691static int 2692userquota_propname_decode(const char *propname, boolean_t zoned, 2693 zfs_userquota_prop_t *typep, char *domain, int domainlen, uint64_t *ridp) 2694{ 2695 zfs_userquota_prop_t type; 2696 char *cp, *end; 2697 char *numericsid = NULL; 2698 boolean_t isuser; 2699 2700 domain[0] = '\0'; 2701 *ridp = 0; 2702 /* Figure out the property type ({user|group}{quota|space}) */ 2703 for (type = 0; type < ZFS_NUM_USERQUOTA_PROPS; type++) { 2704 if (strncmp(propname, zfs_userquota_prop_prefixes[type], 2705 strlen(zfs_userquota_prop_prefixes[type])) == 0) 2706 break; 2707 } 2708 if (type == ZFS_NUM_USERQUOTA_PROPS) 2709 return (EINVAL); 2710 *typep = type; 2711 2712 isuser = (type == ZFS_PROP_USERQUOTA || 2713 type == ZFS_PROP_USERUSED); 2714 2715 cp = strchr(propname, '@') + 1; 2716 2717 if (strchr(cp, '@')) { 2718#ifdef illumos 2719 /* 2720 * It's a SID name (eg "user@domain") that needs to be 2721 * turned into S-1-domainID-RID. 2722 */ 2723 int flag = 0; 2724 idmap_stat stat, map_stat; 2725 uid_t pid; 2726 idmap_rid_t rid; 2727 idmap_get_handle_t *gh = NULL; 2728 2729 stat = idmap_get_create(&gh); 2730 if (stat != IDMAP_SUCCESS) { 2731 idmap_get_destroy(gh); 2732 return (ENOMEM); 2733 } 2734 if (zoned && getzoneid() == GLOBAL_ZONEID) 2735 return (ENOENT); 2736 if (isuser) { 2737 stat = idmap_getuidbywinname(cp, NULL, flag, &pid); 2738 if (stat < 0) 2739 return (ENOENT); 2740 stat = idmap_get_sidbyuid(gh, pid, flag, &numericsid, 2741 &rid, &map_stat); 2742 } else { 2743 stat = idmap_getgidbywinname(cp, NULL, flag, &pid); 2744 if (stat < 0) 2745 return (ENOENT); 2746 stat = idmap_get_sidbygid(gh, pid, flag, &numericsid, 2747 &rid, &map_stat); 2748 } 2749 if (stat < 0) { 2750 idmap_get_destroy(gh); 2751 return (ENOENT); 2752 } 2753 stat = idmap_get_mappings(gh); 2754 idmap_get_destroy(gh); 2755 2756 if (stat < 0) { 2757 return (ENOENT); 2758 } 2759 if (numericsid == NULL) 2760 return (ENOENT); 2761 cp = numericsid; 2762 *ridp = rid; 2763 /* will be further decoded below */ 2764#else /* !illumos */ 2765 return (ENOENT); 2766#endif /* illumos */ 2767 } 2768 2769 if (strncmp(cp, "S-1-", 4) == 0) { 2770 /* It's a numeric SID (eg "S-1-234-567-89") */ 2771 (void) strlcpy(domain, cp, domainlen); 2772 errno = 0; 2773 if (*ridp == 0) { 2774 cp = strrchr(domain, '-'); 2775 *cp = '\0'; 2776 cp++; 2777 *ridp = strtoull(cp, &end, 10); 2778 } else { 2779 end = ""; 2780 } 2781 if (numericsid) { 2782 free(numericsid); 2783 numericsid = NULL; 2784 } 2785 if (errno != 0 || *end != '\0') 2786 return (EINVAL); 2787 } else if (!isdigit(*cp)) { 2788 /* 2789 * It's a user/group name (eg "user") that needs to be 2790 * turned into a uid/gid 2791 */ 2792 if (zoned && getzoneid() == GLOBAL_ZONEID) 2793 return (ENOENT); 2794 if (isuser) { 2795 struct passwd *pw; 2796 pw = getpwnam(cp); 2797 if (pw == NULL) 2798 return (ENOENT); 2799 *ridp = pw->pw_uid; 2800 } else { 2801 struct group *gr; 2802 gr = getgrnam(cp); 2803 if (gr == NULL) 2804 return (ENOENT); 2805 *ridp = gr->gr_gid; 2806 } 2807 } else { 2808 /* It's a user/group ID (eg "12345"). */ 2809 uid_t id = strtoul(cp, &end, 10); 2810 idmap_rid_t rid; 2811 char *mapdomain; 2812 2813 if (*end != '\0') 2814 return (EINVAL); 2815 if (id > MAXUID) { 2816 /* It's an ephemeral ID. */ 2817 if (idmap_id_to_numeric_domain_rid(id, isuser, 2818 &mapdomain, &rid) != 0) 2819 return (ENOENT); 2820 (void) strlcpy(domain, mapdomain, domainlen); 2821 *ridp = rid; 2822 } else { 2823 *ridp = id; 2824 } 2825 } 2826 2827 ASSERT3P(numericsid, ==, NULL); 2828 return (0); 2829} 2830 2831static int 2832zfs_prop_get_userquota_common(zfs_handle_t *zhp, const char *propname, 2833 uint64_t *propvalue, zfs_userquota_prop_t *typep) 2834{ 2835 int err; 2836 zfs_cmd_t zc = { 0 }; 2837 2838 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 2839 2840 err = userquota_propname_decode(propname, 2841 zfs_prop_get_int(zhp, ZFS_PROP_ZONED), 2842 typep, zc.zc_value, sizeof (zc.zc_value), &zc.zc_guid); 2843 zc.zc_objset_type = *typep; 2844 if (err) 2845 return (err); 2846 2847 err = ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_USERSPACE_ONE, &zc); 2848 if (err) 2849 return (err); 2850 2851 *propvalue = zc.zc_cookie; 2852 return (0); 2853} 2854 2855int 2856zfs_prop_get_userquota_int(zfs_handle_t *zhp, const char *propname, 2857 uint64_t *propvalue) 2858{ 2859 zfs_userquota_prop_t type; 2860 2861 return (zfs_prop_get_userquota_common(zhp, propname, propvalue, 2862 &type)); 2863} 2864 2865int 2866zfs_prop_get_userquota(zfs_handle_t *zhp, const char *propname, 2867 char *propbuf, int proplen, boolean_t literal) 2868{ 2869 int err; 2870 uint64_t propvalue; 2871 zfs_userquota_prop_t type; 2872 2873 err = zfs_prop_get_userquota_common(zhp, propname, &propvalue, 2874 &type); 2875 2876 if (err) 2877 return (err); 2878 2879 if (literal) { 2880 (void) snprintf(propbuf, proplen, "%llu", propvalue); 2881 } else if (propvalue == 0 && 2882 (type == ZFS_PROP_USERQUOTA || type == ZFS_PROP_GROUPQUOTA)) { 2883 (void) strlcpy(propbuf, "none", proplen); 2884 } else { 2885 zfs_nicenum(propvalue, propbuf, proplen); 2886 } 2887 return (0); 2888} 2889 2890int 2891zfs_prop_get_written_int(zfs_handle_t *zhp, const char *propname, 2892 uint64_t *propvalue) 2893{ 2894 int err; 2895 zfs_cmd_t zc = { 0 }; 2896 const char *snapname; 2897 2898 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 2899 2900 snapname = strchr(propname, '@') + 1; 2901 if (strchr(snapname, '@')) { 2902 (void) strlcpy(zc.zc_value, snapname, sizeof (zc.zc_value)); 2903 } else { 2904 /* snapname is the short name, append it to zhp's fsname */ 2905 char *cp; 2906 2907 (void) strlcpy(zc.zc_value, zhp->zfs_name, 2908 sizeof (zc.zc_value)); 2909 cp = strchr(zc.zc_value, '@'); 2910 if (cp != NULL) 2911 *cp = '\0'; 2912 (void) strlcat(zc.zc_value, "@", sizeof (zc.zc_value)); 2913 (void) strlcat(zc.zc_value, snapname, sizeof (zc.zc_value)); 2914 } 2915 2916 err = ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_SPACE_WRITTEN, &zc); 2917 if (err) 2918 return (err); 2919 2920 *propvalue = zc.zc_cookie; 2921 return (0); 2922} 2923 2924int 2925zfs_prop_get_written(zfs_handle_t *zhp, const char *propname, 2926 char *propbuf, int proplen, boolean_t literal) 2927{ 2928 int err; 2929 uint64_t propvalue; 2930 2931 err = zfs_prop_get_written_int(zhp, propname, &propvalue); 2932 2933 if (err) 2934 return (err); 2935 2936 if (literal) { 2937 (void) snprintf(propbuf, proplen, "%llu", propvalue); 2938 } else { 2939 zfs_nicenum(propvalue, propbuf, proplen); 2940 } 2941 return (0); 2942} 2943 2944/* 2945 * Returns the name of the given zfs handle. 2946 */ 2947const char * 2948zfs_get_name(const zfs_handle_t *zhp) 2949{ 2950 return (zhp->zfs_name); 2951} 2952 2953/* 2954 * Returns the type of the given zfs handle. 2955 */ 2956zfs_type_t 2957zfs_get_type(const zfs_handle_t *zhp) 2958{ 2959 return (zhp->zfs_type); 2960} 2961 2962/* 2963 * Is one dataset name a child dataset of another? 2964 * 2965 * Needs to handle these cases: 2966 * Dataset 1 "a/foo" "a/foo" "a/foo" "a/foo" 2967 * Dataset 2 "a/fo" "a/foobar" "a/bar/baz" "a/foo/bar" 2968 * Descendant? No. No. No. Yes. 2969 */ 2970static boolean_t 2971is_descendant(const char *ds1, const char *ds2) 2972{ 2973 size_t d1len = strlen(ds1); 2974 2975 /* ds2 can't be a descendant if it's smaller */ 2976 if (strlen(ds2) < d1len) 2977 return (B_FALSE); 2978 2979 /* otherwise, compare strings and verify that there's a '/' char */ 2980 return (ds2[d1len] == '/' && (strncmp(ds1, ds2, d1len) == 0)); 2981} 2982 2983/* 2984 * Given a complete name, return just the portion that refers to the parent. 2985 * Will return -1 if there is no parent (path is just the name of the 2986 * pool). 2987 */ 2988static int 2989parent_name(const char *path, char *buf, size_t buflen) 2990{ 2991 char *slashp; 2992 2993 (void) strlcpy(buf, path, buflen); 2994 2995 if ((slashp = strrchr(buf, '/')) == NULL) 2996 return (-1); 2997 *slashp = '\0'; 2998 2999 return (0); 3000} 3001 3002/* 3003 * If accept_ancestor is false, then check to make sure that the given path has 3004 * a parent, and that it exists. If accept_ancestor is true, then find the 3005 * closest existing ancestor for the given path. In prefixlen return the 3006 * length of already existing prefix of the given path. We also fetch the 3007 * 'zoned' property, which is used to validate property settings when creating 3008 * new datasets. 3009 */ 3010static int 3011check_parents(libzfs_handle_t *hdl, const char *path, uint64_t *zoned, 3012 boolean_t accept_ancestor, int *prefixlen) 3013{ 3014 zfs_cmd_t zc = { 0 }; 3015 char parent[ZFS_MAXNAMELEN]; 3016 char *slash; 3017 zfs_handle_t *zhp; 3018 char errbuf[1024]; 3019 uint64_t is_zoned; 3020 3021 (void) snprintf(errbuf, sizeof (errbuf), 3022 dgettext(TEXT_DOMAIN, "cannot create '%s'"), path); 3023 3024 /* get parent, and check to see if this is just a pool */ 3025 if (parent_name(path, parent, sizeof (parent)) != 0) { 3026 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3027 "missing dataset name")); 3028 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3029 } 3030 3031 /* check to see if the pool exists */ 3032 if ((slash = strchr(parent, '/')) == NULL) 3033 slash = parent + strlen(parent); 3034 (void) strncpy(zc.zc_name, parent, slash - parent); 3035 zc.zc_name[slash - parent] = '\0'; 3036 if (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_STATS, &zc) != 0 && 3037 errno == ENOENT) { 3038 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3039 "no such pool '%s'"), zc.zc_name); 3040 return (zfs_error(hdl, EZFS_NOENT, errbuf)); 3041 } 3042 3043 /* check to see if the parent dataset exists */ 3044 while ((zhp = make_dataset_handle(hdl, parent)) == NULL) { 3045 if (errno == ENOENT && accept_ancestor) { 3046 /* 3047 * Go deeper to find an ancestor, give up on top level. 3048 */ 3049 if (parent_name(parent, parent, sizeof (parent)) != 0) { 3050 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3051 "no such pool '%s'"), zc.zc_name); 3052 return (zfs_error(hdl, EZFS_NOENT, errbuf)); 3053 } 3054 } else if (errno == ENOENT) { 3055 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3056 "parent does not exist")); 3057 return (zfs_error(hdl, EZFS_NOENT, errbuf)); 3058 } else 3059 return (zfs_standard_error(hdl, errno, errbuf)); 3060 } 3061 3062 is_zoned = zfs_prop_get_int(zhp, ZFS_PROP_ZONED); 3063 if (zoned != NULL) 3064 *zoned = is_zoned; 3065 3066 /* we are in a non-global zone, but parent is in the global zone */ 3067 if (getzoneid() != GLOBAL_ZONEID && !is_zoned) { 3068 (void) zfs_standard_error(hdl, EPERM, errbuf); 3069 zfs_close(zhp); 3070 return (-1); 3071 } 3072 3073 /* make sure parent is a filesystem */ 3074 if (zfs_get_type(zhp) != ZFS_TYPE_FILESYSTEM) { 3075 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3076 "parent is not a filesystem")); 3077 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf); 3078 zfs_close(zhp); 3079 return (-1); 3080 } 3081 3082 zfs_close(zhp); 3083 if (prefixlen != NULL) 3084 *prefixlen = strlen(parent); 3085 return (0); 3086} 3087 3088/* 3089 * Finds whether the dataset of the given type(s) exists. 3090 */ 3091boolean_t 3092zfs_dataset_exists(libzfs_handle_t *hdl, const char *path, zfs_type_t types) 3093{ 3094 zfs_handle_t *zhp; 3095 3096 if (!zfs_validate_name(hdl, path, types, B_FALSE)) 3097 return (B_FALSE); 3098 3099 /* 3100 * Try to get stats for the dataset, which will tell us if it exists. 3101 */ 3102 if ((zhp = make_dataset_handle(hdl, path)) != NULL) { 3103 int ds_type = zhp->zfs_type; 3104 3105 zfs_close(zhp); 3106 if (types & ds_type) 3107 return (B_TRUE); 3108 } 3109 return (B_FALSE); 3110} 3111 3112/* 3113 * Given a path to 'target', create all the ancestors between 3114 * the prefixlen portion of the path, and the target itself. 3115 * Fail if the initial prefixlen-ancestor does not already exist. 3116 */ 3117int 3118create_parents(libzfs_handle_t *hdl, char *target, int prefixlen) 3119{ 3120 zfs_handle_t *h; 3121 char *cp; 3122 const char *opname; 3123 3124 /* make sure prefix exists */ 3125 cp = target + prefixlen; 3126 if (*cp != '/') { 3127 assert(strchr(cp, '/') == NULL); 3128 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM); 3129 } else { 3130 *cp = '\0'; 3131 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM); 3132 *cp = '/'; 3133 } 3134 if (h == NULL) 3135 return (-1); 3136 zfs_close(h); 3137 3138 /* 3139 * Attempt to create, mount, and share any ancestor filesystems, 3140 * up to the prefixlen-long one. 3141 */ 3142 for (cp = target + prefixlen + 1; 3143 (cp = strchr(cp, '/')) != NULL; *cp = '/', cp++) { 3144 3145 *cp = '\0'; 3146 3147 h = make_dataset_handle(hdl, target); 3148 if (h) { 3149 /* it already exists, nothing to do here */ 3150 zfs_close(h); 3151 continue; 3152 } 3153 3154 if (zfs_create(hdl, target, ZFS_TYPE_FILESYSTEM, 3155 NULL) != 0) { 3156 opname = dgettext(TEXT_DOMAIN, "create"); 3157 goto ancestorerr; 3158 } 3159 3160 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM); 3161 if (h == NULL) { 3162 opname = dgettext(TEXT_DOMAIN, "open"); 3163 goto ancestorerr; 3164 } 3165 3166 if (zfs_mount(h, NULL, 0) != 0) { 3167 opname = dgettext(TEXT_DOMAIN, "mount"); 3168 goto ancestorerr; 3169 } 3170 3171 if (zfs_share(h) != 0) { 3172 opname = dgettext(TEXT_DOMAIN, "share"); 3173 goto ancestorerr; 3174 } 3175 3176 zfs_close(h); 3177 } 3178 3179 return (0); 3180 3181ancestorerr: 3182 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3183 "failed to %s ancestor '%s'"), opname, target); 3184 return (-1); 3185} 3186 3187/* 3188 * Creates non-existing ancestors of the given path. 3189 */ 3190int 3191zfs_create_ancestors(libzfs_handle_t *hdl, const char *path) 3192{ 3193 int prefix; 3194 char *path_copy; 3195 int rc; 3196 3197 if (check_parents(hdl, path, NULL, B_TRUE, &prefix) != 0) 3198 return (-1); 3199 3200 if ((path_copy = strdup(path)) != NULL) { 3201 rc = create_parents(hdl, path_copy, prefix); 3202 free(path_copy); 3203 } 3204 if (path_copy == NULL || rc != 0) 3205 return (-1); 3206 3207 return (0); 3208} 3209 3210/* 3211 * Create a new filesystem or volume. 3212 */ 3213int 3214zfs_create(libzfs_handle_t *hdl, const char *path, zfs_type_t type, 3215 nvlist_t *props) 3216{ 3217 int ret; 3218 uint64_t size = 0; 3219 uint64_t blocksize = zfs_prop_default_numeric(ZFS_PROP_VOLBLOCKSIZE); 3220 char errbuf[1024]; 3221 uint64_t zoned; 3222 enum lzc_dataset_type ost; 3223 3224 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3225 "cannot create '%s'"), path); 3226 3227 /* validate the path, taking care to note the extended error message */ 3228 if (!zfs_validate_name(hdl, path, type, B_TRUE)) 3229 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3230 3231 /* validate parents exist */ 3232 if (check_parents(hdl, path, &zoned, B_FALSE, NULL) != 0) 3233 return (-1); 3234 3235 /* 3236 * The failure modes when creating a dataset of a different type over 3237 * one that already exists is a little strange. In particular, if you 3238 * try to create a dataset on top of an existing dataset, the ioctl() 3239 * will return ENOENT, not EEXIST. To prevent this from happening, we 3240 * first try to see if the dataset exists. 3241 */ 3242 if (zfs_dataset_exists(hdl, path, ZFS_TYPE_DATASET)) { 3243 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3244 "dataset already exists")); 3245 return (zfs_error(hdl, EZFS_EXISTS, errbuf)); 3246 } 3247 3248 if (type == ZFS_TYPE_VOLUME) 3249 ost = LZC_DATSET_TYPE_ZVOL; 3250 else 3251 ost = LZC_DATSET_TYPE_ZFS; 3252 3253 /* open zpool handle for prop validation */ 3254 char pool_path[MAXNAMELEN]; 3255 (void) strlcpy(pool_path, path, sizeof (pool_path)); 3256 3257 /* truncate pool_path at first slash */ 3258 char *p = strchr(pool_path, '/'); 3259 if (p != NULL) 3260 *p = '\0'; 3261 3262 zpool_handle_t *zpool_handle = zpool_open(hdl, pool_path); 3263 3264 if (props && (props = zfs_valid_proplist(hdl, type, props, 3265 zoned, NULL, zpool_handle, errbuf)) == 0) { 3266 zpool_close(zpool_handle); 3267 return (-1); 3268 } 3269 zpool_close(zpool_handle); 3270 3271 if (type == ZFS_TYPE_VOLUME) { 3272 /* 3273 * If we are creating a volume, the size and block size must 3274 * satisfy a few restraints. First, the blocksize must be a 3275 * valid block size between SPA_{MIN,MAX}BLOCKSIZE. Second, the 3276 * volsize must be a multiple of the block size, and cannot be 3277 * zero. 3278 */ 3279 if (props == NULL || nvlist_lookup_uint64(props, 3280 zfs_prop_to_name(ZFS_PROP_VOLSIZE), &size) != 0) { 3281 nvlist_free(props); 3282 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3283 "missing volume size")); 3284 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 3285 } 3286 3287 if ((ret = nvlist_lookup_uint64(props, 3288 zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE), 3289 &blocksize)) != 0) { 3290 if (ret == ENOENT) { 3291 blocksize = zfs_prop_default_numeric( 3292 ZFS_PROP_VOLBLOCKSIZE); 3293 } else { 3294 nvlist_free(props); 3295 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3296 "missing volume block size")); 3297 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 3298 } 3299 } 3300 3301 if (size == 0) { 3302 nvlist_free(props); 3303 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3304 "volume size cannot be zero")); 3305 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 3306 } 3307 3308 if (size % blocksize != 0) { 3309 nvlist_free(props); 3310 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3311 "volume size must be a multiple of volume block " 3312 "size")); 3313 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 3314 } 3315 } 3316 3317 /* create the dataset */ 3318 ret = lzc_create(path, ost, props); 3319 nvlist_free(props); 3320 3321 /* check for failure */ 3322 if (ret != 0) { 3323 char parent[ZFS_MAXNAMELEN]; 3324 (void) parent_name(path, parent, sizeof (parent)); 3325 3326 switch (errno) { 3327 case ENOENT: 3328 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3329 "no such parent '%s'"), parent); 3330 return (zfs_error(hdl, EZFS_NOENT, errbuf)); 3331 3332 case EINVAL: 3333 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3334 "parent '%s' is not a filesystem"), parent); 3335 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 3336 3337 case ENOTSUP: 3338 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3339 "pool must be upgraded to set this " 3340 "property or value")); 3341 return (zfs_error(hdl, EZFS_BADVERSION, errbuf)); 3342#ifdef _ILP32 3343 case EOVERFLOW: 3344 /* 3345 * This platform can't address a volume this big. 3346 */ 3347 if (type == ZFS_TYPE_VOLUME) 3348 return (zfs_error(hdl, EZFS_VOLTOOBIG, 3349 errbuf)); 3350#endif 3351 /* FALLTHROUGH */ 3352 default: 3353 return (zfs_standard_error(hdl, errno, errbuf)); 3354 } 3355 } 3356 3357 return (0); 3358} 3359 3360/* 3361 * Destroys the given dataset. The caller must make sure that the filesystem 3362 * isn't mounted, and that there are no active dependents. If the file system 3363 * does not exist this function does nothing. 3364 */ 3365int 3366zfs_destroy(zfs_handle_t *zhp, boolean_t defer) 3367{ 3368 zfs_cmd_t zc = { 0 }; 3369 3370 if (zhp->zfs_type == ZFS_TYPE_BOOKMARK) { 3371 nvlist_t *nv = fnvlist_alloc(); 3372 fnvlist_add_boolean(nv, zhp->zfs_name); 3373 int error = lzc_destroy_bookmarks(nv, NULL); 3374 fnvlist_free(nv); 3375 if (error != 0) { 3376 return (zfs_standard_error_fmt(zhp->zfs_hdl, errno, 3377 dgettext(TEXT_DOMAIN, "cannot destroy '%s'"), 3378 zhp->zfs_name)); 3379 } 3380 return (0); 3381 } 3382 3383 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 3384 3385 if (ZFS_IS_VOLUME(zhp)) { 3386 zc.zc_objset_type = DMU_OST_ZVOL; 3387 } else { 3388 zc.zc_objset_type = DMU_OST_ZFS; 3389 } 3390 3391 zc.zc_defer_destroy = defer; 3392 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_DESTROY, &zc) != 0 && 3393 errno != ENOENT) { 3394 return (zfs_standard_error_fmt(zhp->zfs_hdl, errno, 3395 dgettext(TEXT_DOMAIN, "cannot destroy '%s'"), 3396 zhp->zfs_name)); 3397 } 3398 3399 remove_mountpoint(zhp); 3400 3401 return (0); 3402} 3403 3404struct destroydata { 3405 nvlist_t *nvl; 3406 const char *snapname; 3407}; 3408 3409static int 3410zfs_check_snap_cb(zfs_handle_t *zhp, void *arg) 3411{ 3412 struct destroydata *dd = arg; 3413 char name[ZFS_MAXNAMELEN]; 3414 int rv = 0; 3415 3416 (void) snprintf(name, sizeof (name), 3417 "%s@%s", zhp->zfs_name, dd->snapname); 3418 3419 if (lzc_exists(name)) 3420 verify(nvlist_add_boolean(dd->nvl, name) == 0); 3421 3422 rv = zfs_iter_filesystems(zhp, zfs_check_snap_cb, dd); 3423 zfs_close(zhp); 3424 return (rv); 3425} 3426 3427/* 3428 * Destroys all snapshots with the given name in zhp & descendants. 3429 */ 3430int 3431zfs_destroy_snaps(zfs_handle_t *zhp, char *snapname, boolean_t defer) 3432{ 3433 int ret; 3434 struct destroydata dd = { 0 }; 3435 3436 dd.snapname = snapname; 3437 verify(nvlist_alloc(&dd.nvl, NV_UNIQUE_NAME, 0) == 0); 3438 (void) zfs_check_snap_cb(zfs_handle_dup(zhp), &dd); 3439 3440 if (nvlist_empty(dd.nvl)) { 3441 ret = zfs_standard_error_fmt(zhp->zfs_hdl, ENOENT, 3442 dgettext(TEXT_DOMAIN, "cannot destroy '%s@%s'"), 3443 zhp->zfs_name, snapname); 3444 } else { 3445 ret = zfs_destroy_snaps_nvl(zhp->zfs_hdl, dd.nvl, defer); 3446 } 3447 nvlist_free(dd.nvl); 3448 return (ret); 3449} 3450 3451/* 3452 * Destroys all the snapshots named in the nvlist. 3453 */ 3454int 3455zfs_destroy_snaps_nvl(libzfs_handle_t *hdl, nvlist_t *snaps, boolean_t defer) 3456{ 3457 int ret; 3458 nvlist_t *errlist = NULL; 3459 3460 ret = lzc_destroy_snaps(snaps, defer, &errlist); 3461 3462 if (ret == 0) { 3463 nvlist_free(errlist); 3464 return (0); 3465 } 3466 3467 if (nvlist_empty(errlist)) { 3468 char errbuf[1024]; 3469 (void) snprintf(errbuf, sizeof (errbuf), 3470 dgettext(TEXT_DOMAIN, "cannot destroy snapshots")); 3471 3472 ret = zfs_standard_error(hdl, ret, errbuf); 3473 } 3474 for (nvpair_t *pair = nvlist_next_nvpair(errlist, NULL); 3475 pair != NULL; pair = nvlist_next_nvpair(errlist, pair)) { 3476 char errbuf[1024]; 3477 (void) snprintf(errbuf, sizeof (errbuf), 3478 dgettext(TEXT_DOMAIN, "cannot destroy snapshot %s"), 3479 nvpair_name(pair)); 3480 3481 switch (fnvpair_value_int32(pair)) { 3482 case EEXIST: 3483 zfs_error_aux(hdl, 3484 dgettext(TEXT_DOMAIN, "snapshot is cloned")); 3485 ret = zfs_error(hdl, EZFS_EXISTS, errbuf); 3486 break; 3487 default: 3488 ret = zfs_standard_error(hdl, errno, errbuf); 3489 break; 3490 } 3491 } 3492 3493 nvlist_free(errlist); 3494 return (ret); 3495} 3496 3497/* 3498 * Clones the given dataset. The target must be of the same type as the source. 3499 */ 3500int 3501zfs_clone(zfs_handle_t *zhp, const char *target, nvlist_t *props) 3502{ 3503 char parent[ZFS_MAXNAMELEN]; 3504 int ret; 3505 char errbuf[1024]; 3506 libzfs_handle_t *hdl = zhp->zfs_hdl; 3507 uint64_t zoned; 3508 3509 assert(zhp->zfs_type == ZFS_TYPE_SNAPSHOT); 3510 3511 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3512 "cannot create '%s'"), target); 3513 3514 /* validate the target/clone name */ 3515 if (!zfs_validate_name(hdl, target, ZFS_TYPE_FILESYSTEM, B_TRUE)) 3516 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3517 3518 /* validate parents exist */ 3519 if (check_parents(hdl, target, &zoned, B_FALSE, NULL) != 0) 3520 return (-1); 3521 3522 (void) parent_name(target, parent, sizeof (parent)); 3523 3524 /* do the clone */ 3525 3526 if (props) { 3527 zfs_type_t type; 3528 if (ZFS_IS_VOLUME(zhp)) { 3529 type = ZFS_TYPE_VOLUME; 3530 } else { 3531 type = ZFS_TYPE_FILESYSTEM; 3532 } 3533 if ((props = zfs_valid_proplist(hdl, type, props, zoned, 3534 zhp, zhp->zpool_hdl, errbuf)) == NULL) 3535 return (-1); 3536 } 3537 3538 ret = lzc_clone(target, zhp->zfs_name, props); 3539 nvlist_free(props); 3540 3541 if (ret != 0) { 3542 switch (errno) { 3543 3544 case ENOENT: 3545 /* 3546 * The parent doesn't exist. We should have caught this 3547 * above, but there may a race condition that has since 3548 * destroyed the parent. 3549 * 3550 * At this point, we don't know whether it's the source 3551 * that doesn't exist anymore, or whether the target 3552 * dataset doesn't exist. 3553 */ 3554 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN, 3555 "no such parent '%s'"), parent); 3556 return (zfs_error(zhp->zfs_hdl, EZFS_NOENT, errbuf)); 3557 3558 case EXDEV: 3559 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN, 3560 "source and target pools differ")); 3561 return (zfs_error(zhp->zfs_hdl, EZFS_CROSSTARGET, 3562 errbuf)); 3563 3564 default: 3565 return (zfs_standard_error(zhp->zfs_hdl, errno, 3566 errbuf)); 3567 } 3568 } 3569 3570 return (ret); 3571} 3572 3573/* 3574 * Promotes the given clone fs to be the clone parent. 3575 */ 3576int 3577zfs_promote(zfs_handle_t *zhp) 3578{ 3579 libzfs_handle_t *hdl = zhp->zfs_hdl; 3580 zfs_cmd_t zc = { 0 }; 3581 char parent[MAXPATHLEN]; 3582 int ret; 3583 char errbuf[1024]; 3584 3585 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3586 "cannot promote '%s'"), zhp->zfs_name); 3587 3588 if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) { 3589 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3590 "snapshots can not be promoted")); 3591 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 3592 } 3593 3594 (void) strlcpy(parent, zhp->zfs_dmustats.dds_origin, sizeof (parent)); 3595 if (parent[0] == '\0') { 3596 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3597 "not a cloned filesystem")); 3598 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 3599 } 3600 3601 (void) strlcpy(zc.zc_value, zhp->zfs_dmustats.dds_origin, 3602 sizeof (zc.zc_value)); 3603 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 3604 ret = zfs_ioctl(hdl, ZFS_IOC_PROMOTE, &zc); 3605 3606 if (ret != 0) { 3607 int save_errno = errno; 3608 3609 switch (save_errno) { 3610 case EEXIST: 3611 /* There is a conflicting snapshot name. */ 3612 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3613 "conflicting snapshot '%s' from parent '%s'"), 3614 zc.zc_string, parent); 3615 return (zfs_error(hdl, EZFS_EXISTS, errbuf)); 3616 3617 default: 3618 return (zfs_standard_error(hdl, save_errno, errbuf)); 3619 } 3620 } 3621 return (ret); 3622} 3623 3624typedef struct snapdata { 3625 nvlist_t *sd_nvl; 3626 const char *sd_snapname; 3627} snapdata_t; 3628 3629static int 3630zfs_snapshot_cb(zfs_handle_t *zhp, void *arg) 3631{ 3632 snapdata_t *sd = arg; 3633 char name[ZFS_MAXNAMELEN]; 3634 int rv = 0; 3635 3636 if (zfs_prop_get_int(zhp, ZFS_PROP_INCONSISTENT) == 0) { 3637 (void) snprintf(name, sizeof (name), 3638 "%s@%s", zfs_get_name(zhp), sd->sd_snapname); 3639 3640 fnvlist_add_boolean(sd->sd_nvl, name); 3641 3642 rv = zfs_iter_filesystems(zhp, zfs_snapshot_cb, sd); 3643 } 3644 zfs_close(zhp); 3645 3646 return (rv); 3647} 3648 3649/* 3650 * Creates snapshots. The keys in the snaps nvlist are the snapshots to be 3651 * created. 3652 */ 3653int 3654zfs_snapshot_nvl(libzfs_handle_t *hdl, nvlist_t *snaps, nvlist_t *props) 3655{ 3656 int ret; 3657 char errbuf[1024]; 3658 nvpair_t *elem; 3659 nvlist_t *errors; 3660 3661 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3662 "cannot create snapshots ")); 3663 3664 elem = NULL; 3665 while ((elem = nvlist_next_nvpair(snaps, elem)) != NULL) { 3666 const char *snapname = nvpair_name(elem); 3667 3668 /* validate the target name */ 3669 if (!zfs_validate_name(hdl, snapname, ZFS_TYPE_SNAPSHOT, 3670 B_TRUE)) { 3671 (void) snprintf(errbuf, sizeof (errbuf), 3672 dgettext(TEXT_DOMAIN, 3673 "cannot create snapshot '%s'"), snapname); 3674 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3675 } 3676 } 3677 3678 /* 3679 * get pool handle for prop validation. assumes all snaps are in the 3680 * same pool, as does lzc_snapshot (below). 3681 */ 3682 char pool[MAXNAMELEN]; 3683 elem = nvlist_next_nvpair(snaps, NULL); 3684 (void) strlcpy(pool, nvpair_name(elem), sizeof (pool)); 3685 pool[strcspn(pool, "/@")] = '\0'; 3686 zpool_handle_t *zpool_hdl = zpool_open(hdl, pool); 3687 3688 if (props != NULL && 3689 (props = zfs_valid_proplist(hdl, ZFS_TYPE_SNAPSHOT, 3690 props, B_FALSE, NULL, zpool_hdl, errbuf)) == NULL) { 3691 zpool_close(zpool_hdl); 3692 return (-1); 3693 } 3694 zpool_close(zpool_hdl); 3695 3696 ret = lzc_snapshot(snaps, props, &errors); 3697 3698 if (ret != 0) { 3699 boolean_t printed = B_FALSE; 3700 for (elem = nvlist_next_nvpair(errors, NULL); 3701 elem != NULL; 3702 elem = nvlist_next_nvpair(errors, elem)) { 3703 (void) snprintf(errbuf, sizeof (errbuf), 3704 dgettext(TEXT_DOMAIN, 3705 "cannot create snapshot '%s'"), nvpair_name(elem)); 3706 (void) zfs_standard_error(hdl, 3707 fnvpair_value_int32(elem), errbuf); 3708 printed = B_TRUE; 3709 } 3710 if (!printed) { 3711 switch (ret) { 3712 case EXDEV: 3713 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3714 "multiple snapshots of same " 3715 "fs not allowed")); 3716 (void) zfs_error(hdl, EZFS_EXISTS, errbuf); 3717 3718 break; 3719 default: 3720 (void) zfs_standard_error(hdl, ret, errbuf); 3721 } 3722 } 3723 } 3724 3725 nvlist_free(props); 3726 nvlist_free(errors); 3727 return (ret); 3728} 3729 3730int 3731zfs_snapshot(libzfs_handle_t *hdl, const char *path, boolean_t recursive, 3732 nvlist_t *props) 3733{ 3734 int ret; 3735 snapdata_t sd = { 0 }; 3736 char fsname[ZFS_MAXNAMELEN]; 3737 char *cp; 3738 zfs_handle_t *zhp; 3739 char errbuf[1024]; 3740 3741 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3742 "cannot snapshot %s"), path); 3743 3744 if (!zfs_validate_name(hdl, path, ZFS_TYPE_SNAPSHOT, B_TRUE)) 3745 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3746 3747 (void) strlcpy(fsname, path, sizeof (fsname)); 3748 cp = strchr(fsname, '@'); 3749 *cp = '\0'; 3750 sd.sd_snapname = cp + 1; 3751 3752 if ((zhp = zfs_open(hdl, fsname, ZFS_TYPE_FILESYSTEM | 3753 ZFS_TYPE_VOLUME)) == NULL) { 3754 return (-1); 3755 } 3756 3757 verify(nvlist_alloc(&sd.sd_nvl, NV_UNIQUE_NAME, 0) == 0); 3758 if (recursive) { 3759 (void) zfs_snapshot_cb(zfs_handle_dup(zhp), &sd); 3760 } else { 3761 fnvlist_add_boolean(sd.sd_nvl, path); 3762 } 3763 3764 ret = zfs_snapshot_nvl(hdl, sd.sd_nvl, props); 3765 nvlist_free(sd.sd_nvl); 3766 zfs_close(zhp); 3767 return (ret); 3768} 3769 3770/* 3771 * Destroy any more recent snapshots. We invoke this callback on any dependents 3772 * of the snapshot first. If the 'cb_dependent' member is non-zero, then this 3773 * is a dependent and we should just destroy it without checking the transaction 3774 * group. 3775 */ 3776typedef struct rollback_data { 3777 const char *cb_target; /* the snapshot */ 3778 uint64_t cb_create; /* creation time reference */ 3779 boolean_t cb_error; 3780 boolean_t cb_force; 3781} rollback_data_t; 3782 3783static int 3784rollback_destroy_dependent(zfs_handle_t *zhp, void *data) 3785{ 3786 rollback_data_t *cbp = data; 3787 prop_changelist_t *clp; 3788 3789 /* We must destroy this clone; first unmount it */ 3790 clp = changelist_gather(zhp, ZFS_PROP_NAME, 0, 3791 cbp->cb_force ? MS_FORCE: 0); 3792 if (clp == NULL || changelist_prefix(clp) != 0) { 3793 cbp->cb_error = B_TRUE; 3794 zfs_close(zhp); 3795 return (0); 3796 } 3797 if (zfs_destroy(zhp, B_FALSE) != 0) 3798 cbp->cb_error = B_TRUE; 3799 else 3800 changelist_remove(clp, zhp->zfs_name); 3801 (void) changelist_postfix(clp); 3802 changelist_free(clp); 3803 3804 zfs_close(zhp); 3805 return (0); 3806} 3807 3808static int 3809rollback_destroy(zfs_handle_t *zhp, void *data) 3810{ 3811 rollback_data_t *cbp = data; 3812 3813 if (zfs_prop_get_int(zhp, ZFS_PROP_CREATETXG) > cbp->cb_create) { 3814 cbp->cb_error |= zfs_iter_dependents(zhp, B_FALSE, 3815 rollback_destroy_dependent, cbp); 3816 3817 cbp->cb_error |= zfs_destroy(zhp, B_FALSE); 3818 } 3819 3820 zfs_close(zhp); 3821 return (0); 3822} 3823 3824/* 3825 * Given a dataset, rollback to a specific snapshot, discarding any 3826 * data changes since then and making it the active dataset. 3827 * 3828 * Any snapshots and bookmarks more recent than the target are 3829 * destroyed, along with their dependents (i.e. clones). 3830 */ 3831int 3832zfs_rollback(zfs_handle_t *zhp, zfs_handle_t *snap, boolean_t force) 3833{ 3834 rollback_data_t cb = { 0 }; 3835 int err; 3836 boolean_t restore_resv = 0; 3837 uint64_t old_volsize, new_volsize; 3838 zfs_prop_t resv_prop; 3839 3840 assert(zhp->zfs_type == ZFS_TYPE_FILESYSTEM || 3841 zhp->zfs_type == ZFS_TYPE_VOLUME); 3842 3843 /* 3844 * Destroy all recent snapshots and their dependents. 3845 */ 3846 cb.cb_force = force; 3847 cb.cb_target = snap->zfs_name; 3848 cb.cb_create = zfs_prop_get_int(snap, ZFS_PROP_CREATETXG); 3849 (void) zfs_iter_snapshots(zhp, B_FALSE, rollback_destroy, &cb); 3850 (void) zfs_iter_bookmarks(zhp, rollback_destroy, &cb); 3851 3852 if (cb.cb_error) 3853 return (-1); 3854 3855 /* 3856 * Now that we have verified that the snapshot is the latest, 3857 * rollback to the given snapshot. 3858 */ 3859 3860 if (zhp->zfs_type == ZFS_TYPE_VOLUME) { 3861 if (zfs_which_resv_prop(zhp, &resv_prop) < 0) 3862 return (-1); 3863 old_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE); 3864 restore_resv = 3865 (old_volsize == zfs_prop_get_int(zhp, resv_prop)); 3866 } 3867 3868 /* 3869 * We rely on zfs_iter_children() to verify that there are no 3870 * newer snapshots for the given dataset. Therefore, we can 3871 * simply pass the name on to the ioctl() call. There is still 3872 * an unlikely race condition where the user has taken a 3873 * snapshot since we verified that this was the most recent. 3874 */ 3875 err = lzc_rollback(zhp->zfs_name, NULL, 0); 3876 if (err != 0) { 3877 (void) zfs_standard_error_fmt(zhp->zfs_hdl, errno, 3878 dgettext(TEXT_DOMAIN, "cannot rollback '%s'"), 3879 zhp->zfs_name); 3880 return (err); 3881 } 3882 3883 /* 3884 * For volumes, if the pre-rollback volsize matched the pre- 3885 * rollback reservation and the volsize has changed then set 3886 * the reservation property to the post-rollback volsize. 3887 * Make a new handle since the rollback closed the dataset. 3888 */ 3889 if ((zhp->zfs_type == ZFS_TYPE_VOLUME) && 3890 (zhp = make_dataset_handle(zhp->zfs_hdl, zhp->zfs_name))) { 3891 if (restore_resv) { 3892 new_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE); 3893 if (old_volsize != new_volsize) 3894 err = zfs_prop_set_int(zhp, resv_prop, 3895 new_volsize); 3896 } 3897 zfs_close(zhp); 3898 } 3899 return (err); 3900} 3901 3902/* 3903 * Renames the given dataset. 3904 */ 3905int 3906zfs_rename(zfs_handle_t *zhp, const char *source, const char *target, 3907 renameflags_t flags) 3908{ 3909 int ret = 0; 3910 zfs_cmd_t zc = { 0 }; 3911 char *delim; 3912 prop_changelist_t *cl = NULL; 3913 zfs_handle_t *zhrp = NULL; 3914 char *parentname = NULL; 3915 char parent[ZFS_MAXNAMELEN]; 3916 char property[ZFS_MAXPROPLEN]; 3917 libzfs_handle_t *hdl = zhp->zfs_hdl; 3918 char errbuf[1024]; 3919 3920 /* if we have the same exact name, just return success */ 3921 if (strcmp(zhp->zfs_name, target) == 0) 3922 return (0); 3923 3924 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3925 "cannot rename to '%s'"), target); 3926 3927 if (source != NULL) { 3928 /* 3929 * This is recursive snapshots rename, put snapshot name 3930 * (that might not exist) into zfs_name. 3931 */ 3932 assert(flags.recurse); 3933 3934 (void) strlcat(zhp->zfs_name, "@", sizeof(zhp->zfs_name)); 3935 (void) strlcat(zhp->zfs_name, source, sizeof(zhp->zfs_name)); 3936 zhp->zfs_type = ZFS_TYPE_SNAPSHOT; 3937 } 3938 3939 /* 3940 * Make sure the target name is valid 3941 */ 3942 if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) { 3943 if ((strchr(target, '@') == NULL) || 3944 *target == '@') { 3945 /* 3946 * Snapshot target name is abbreviated, 3947 * reconstruct full dataset name 3948 */ 3949 (void) strlcpy(parent, zhp->zfs_name, 3950 sizeof (parent)); 3951 delim = strchr(parent, '@'); 3952 if (strchr(target, '@') == NULL) 3953 *(++delim) = '\0'; 3954 else 3955 *delim = '\0'; 3956 (void) strlcat(parent, target, sizeof (parent)); 3957 target = parent; 3958 } else { 3959 /* 3960 * Make sure we're renaming within the same dataset. 3961 */ 3962 delim = strchr(target, '@'); 3963 if (strncmp(zhp->zfs_name, target, delim - target) 3964 != 0 || zhp->zfs_name[delim - target] != '@') { 3965 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3966 "snapshots must be part of same " 3967 "dataset")); 3968 return (zfs_error(hdl, EZFS_CROSSTARGET, 3969 errbuf)); 3970 } 3971 } 3972 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE)) 3973 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3974 } else { 3975 if (flags.recurse) { 3976 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3977 "recursive rename must be a snapshot")); 3978 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 3979 } 3980 3981 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE)) 3982 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3983 3984 /* validate parents */ 3985 if (check_parents(hdl, target, NULL, B_FALSE, NULL) != 0) 3986 return (-1); 3987 3988 /* make sure we're in the same pool */ 3989 verify((delim = strchr(target, '/')) != NULL); 3990 if (strncmp(zhp->zfs_name, target, delim - target) != 0 || 3991 zhp->zfs_name[delim - target] != '/') { 3992 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3993 "datasets must be within same pool")); 3994 return (zfs_error(hdl, EZFS_CROSSTARGET, errbuf)); 3995 } 3996 3997 /* new name cannot be a child of the current dataset name */ 3998 if (is_descendant(zhp->zfs_name, target)) { 3999 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4000 "New dataset name cannot be a descendant of " 4001 "current dataset name")); 4002 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 4003 } 4004 } 4005 4006 (void) snprintf(errbuf, sizeof (errbuf), 4007 dgettext(TEXT_DOMAIN, "cannot rename '%s'"), zhp->zfs_name); 4008 4009 if (getzoneid() == GLOBAL_ZONEID && 4010 zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) { 4011 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4012 "dataset is used in a non-global zone")); 4013 return (zfs_error(hdl, EZFS_ZONED, errbuf)); 4014 } 4015 4016 /* 4017 * Avoid unmounting file systems with mountpoint property set to 4018 * 'legacy' or 'none' even if -u option is not given. 4019 */ 4020 if (zhp->zfs_type == ZFS_TYPE_FILESYSTEM && 4021 !flags.recurse && !flags.nounmount && 4022 zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, property, 4023 sizeof (property), NULL, NULL, 0, B_FALSE) == 0 && 4024 (strcmp(property, "legacy") == 0 || 4025 strcmp(property, "none") == 0)) { 4026 flags.nounmount = B_TRUE; 4027 } 4028 if (flags.recurse) { 4029 4030 parentname = zfs_strdup(zhp->zfs_hdl, zhp->zfs_name); 4031 if (parentname == NULL) { 4032 ret = -1; 4033 goto error; 4034 } 4035 delim = strchr(parentname, '@'); 4036 *delim = '\0'; 4037 zhrp = zfs_open(zhp->zfs_hdl, parentname, ZFS_TYPE_DATASET); 4038 if (zhrp == NULL) { 4039 ret = -1; 4040 goto error; 4041 } 4042 } else if (zhp->zfs_type != ZFS_TYPE_SNAPSHOT) { 4043 if ((cl = changelist_gather(zhp, ZFS_PROP_NAME, 4044 flags.nounmount ? CL_GATHER_DONT_UNMOUNT : 0, 4045 flags.forceunmount ? MS_FORCE : 0)) == NULL) { 4046 return (-1); 4047 } 4048 4049 if (changelist_haszonedchild(cl)) { 4050 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4051 "child dataset with inherited mountpoint is used " 4052 "in a non-global zone")); 4053 (void) zfs_error(hdl, EZFS_ZONED, errbuf); 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_MAXNAMELEN]; 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_MAXNAMELEN]; 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, ZFS_MAXNAMELEN); 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