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) 2018, Joyent, Inc. All rights reserved. 25 * Copyright (c) 2011, 2016 by Delphix. All rights reserved. 26 * Copyright (c) 2012 DEY Storage Systems, Inc. All rights reserved. 27 * Copyright (c) 2011-2012 Pawel Jakub Dawidek. All rights reserved. 28 * Copyright (c) 2013 Martin Matuska. All rights reserved. 29 * Copyright (c) 2013 Steven Hartland. All rights reserved. 30 * Copyright (c) 2014 Integros [integros.com] 31 * Copyright 2017 Nexenta Systems, Inc. 32 * Copyright 2016 Igor Kozhukhov <ikozhukhov@gmail.com> 33 * Copyright 2017-2018 RackTop Systems. 34 * Copyright (c) 2019 Datto Inc. 35 */ 36 37#include <ctype.h> 38#include <errno.h> 39#include <libintl.h> 40#include <math.h> 41#include <stdio.h> 42#include <stdlib.h> 43#include <strings.h> 44#include <unistd.h> 45#include <stddef.h> 46#include <zone.h> 47#include <fcntl.h> 48#include <sys/mntent.h> 49#include <sys/mount.h> 50#include <priv.h> 51#include <pwd.h> 52#include <grp.h> 53#include <stddef.h> 54#ifdef illumos 55#include <idmap.h> 56#endif 57 58#include <sys/dnode.h> 59#include <sys/spa.h> 60#include <sys/zap.h> 61#include <sys/misc.h> 62#include <libzfs.h> 63 64#include "zfs_namecheck.h" 65#include "zfs_prop.h" 66#include "libzfs_impl.h" 67#include "zfs_deleg.h" 68 69static int userquota_propname_decode(const char *propname, boolean_t zoned, 70 zfs_userquota_prop_t *typep, char *domain, int domainlen, uint64_t *ridp); 71 72/* 73 * Given a single type (not a mask of types), return the type in a human 74 * readable form. 75 */ 76const char * 77zfs_type_to_name(zfs_type_t type) 78{ 79 switch (type) { 80 case ZFS_TYPE_FILESYSTEM: 81 return (dgettext(TEXT_DOMAIN, "filesystem")); 82 case ZFS_TYPE_SNAPSHOT: 83 return (dgettext(TEXT_DOMAIN, "snapshot")); 84 case ZFS_TYPE_VOLUME: 85 return (dgettext(TEXT_DOMAIN, "volume")); 86 case ZFS_TYPE_POOL: 87 return (dgettext(TEXT_DOMAIN, "pool")); 88 case ZFS_TYPE_BOOKMARK: 89 return (dgettext(TEXT_DOMAIN, "bookmark")); 90 default: 91 assert(!"unhandled zfs_type_t"); 92 } 93 94 return (NULL); 95} 96 97/* 98 * Validate a ZFS path. This is used even before trying to open the dataset, to 99 * provide a more meaningful error message. We call zfs_error_aux() to 100 * explain exactly why the name was not valid. 101 */ 102int 103zfs_validate_name(libzfs_handle_t *hdl, const char *path, int type, 104 boolean_t modifying) 105{ 106 namecheck_err_t why; 107 char what; 108 109 if (entity_namecheck(path, &why, &what) != 0) { 110 if (hdl != NULL) { 111 switch (why) { 112 case NAME_ERR_TOOLONG: 113 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 114 "name is too long")); 115 break; 116 117 case NAME_ERR_LEADING_SLASH: 118 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 119 "leading slash in name")); 120 break; 121 122 case NAME_ERR_EMPTY_COMPONENT: 123 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 124 "empty component in name")); 125 break; 126 127 case NAME_ERR_TRAILING_SLASH: 128 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 129 "trailing slash in name")); 130 break; 131 132 case NAME_ERR_INVALCHAR: 133 zfs_error_aux(hdl, 134 dgettext(TEXT_DOMAIN, "invalid character " 135 "'%c' in name"), what); 136 break; 137 138 case NAME_ERR_MULTIPLE_DELIMITERS: 139 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 140 "multiple '@' and/or '#' delimiters in " 141 "name")); 142 break; 143 144 case NAME_ERR_NOLETTER: 145 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 146 "pool doesn't begin with a letter")); 147 break; 148 149 case NAME_ERR_RESERVED: 150 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 151 "name is reserved")); 152 break; 153 154 case NAME_ERR_DISKLIKE: 155 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 156 "reserved disk name")); 157 break; 158 159 default: 160 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 161 "(%d) not defined"), why); 162 break; 163 } 164 } 165 166 return (0); 167 } 168 169 if (!(type & ZFS_TYPE_SNAPSHOT) && strchr(path, '@') != NULL) { 170 if (hdl != NULL) 171 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 172 "snapshot delimiter '@' is not expected here")); 173 return (0); 174 } 175 176 if (type == ZFS_TYPE_SNAPSHOT && strchr(path, '@') == NULL) { 177 if (hdl != NULL) 178 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 179 "missing '@' delimiter in snapshot name")); 180 return (0); 181 } 182 183 if (!(type & ZFS_TYPE_BOOKMARK) && strchr(path, '#') != NULL) { 184 if (hdl != NULL) 185 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 186 "bookmark delimiter '#' is not expected here")); 187 return (0); 188 } 189 190 if (type == ZFS_TYPE_BOOKMARK && strchr(path, '#') == NULL) { 191 if (hdl != NULL) 192 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 193 "missing '#' delimiter in bookmark name")); 194 return (0); 195 } 196 197 if (modifying && strchr(path, '%') != NULL) { 198 if (hdl != NULL) 199 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 200 "invalid character %c in name"), '%'); 201 return (0); 202 } 203 204 return (-1); 205} 206 207int 208zfs_name_valid(const char *name, zfs_type_t type) 209{ 210 if (type == ZFS_TYPE_POOL) 211 return (zpool_name_valid(NULL, B_FALSE, name)); 212 return (zfs_validate_name(NULL, name, type, B_FALSE)); 213} 214 215/* 216 * This function takes the raw DSL properties, and filters out the user-defined 217 * properties into a separate nvlist. 218 */ 219static nvlist_t * 220process_user_props(zfs_handle_t *zhp, nvlist_t *props) 221{ 222 libzfs_handle_t *hdl = zhp->zfs_hdl; 223 nvpair_t *elem; 224 nvlist_t *propval; 225 nvlist_t *nvl; 226 227 if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0) { 228 (void) no_memory(hdl); 229 return (NULL); 230 } 231 232 elem = NULL; 233 while ((elem = nvlist_next_nvpair(props, elem)) != NULL) { 234 if (!zfs_prop_user(nvpair_name(elem))) 235 continue; 236 237 verify(nvpair_value_nvlist(elem, &propval) == 0); 238 if (nvlist_add_nvlist(nvl, nvpair_name(elem), propval) != 0) { 239 nvlist_free(nvl); 240 (void) no_memory(hdl); 241 return (NULL); 242 } 243 } 244 245 return (nvl); 246} 247 248static zpool_handle_t * 249zpool_add_handle(zfs_handle_t *zhp, const char *pool_name) 250{ 251 libzfs_handle_t *hdl = zhp->zfs_hdl; 252 zpool_handle_t *zph; 253 254 if ((zph = zpool_open_canfail(hdl, pool_name)) != NULL) { 255 if (hdl->libzfs_pool_handles != NULL) 256 zph->zpool_next = hdl->libzfs_pool_handles; 257 hdl->libzfs_pool_handles = zph; 258 } 259 return (zph); 260} 261 262static zpool_handle_t * 263zpool_find_handle(zfs_handle_t *zhp, const char *pool_name, int len) 264{ 265 libzfs_handle_t *hdl = zhp->zfs_hdl; 266 zpool_handle_t *zph = hdl->libzfs_pool_handles; 267 268 while ((zph != NULL) && 269 (strncmp(pool_name, zpool_get_name(zph), len) != 0)) 270 zph = zph->zpool_next; 271 return (zph); 272} 273 274/* 275 * Returns a handle to the pool that contains the provided dataset. 276 * If a handle to that pool already exists then that handle is returned. 277 * Otherwise, a new handle is created and added to the list of handles. 278 */ 279static zpool_handle_t * 280zpool_handle(zfs_handle_t *zhp) 281{ 282 char *pool_name; 283 int len; 284 zpool_handle_t *zph; 285 286 len = strcspn(zhp->zfs_name, "/@#") + 1; 287 pool_name = zfs_alloc(zhp->zfs_hdl, len); 288 (void) strlcpy(pool_name, zhp->zfs_name, len); 289 290 zph = zpool_find_handle(zhp, pool_name, len); 291 if (zph == NULL) 292 zph = zpool_add_handle(zhp, pool_name); 293 294 free(pool_name); 295 return (zph); 296} 297 298void 299zpool_free_handles(libzfs_handle_t *hdl) 300{ 301 zpool_handle_t *next, *zph = hdl->libzfs_pool_handles; 302 303 while (zph != NULL) { 304 next = zph->zpool_next; 305 zpool_close(zph); 306 zph = next; 307 } 308 hdl->libzfs_pool_handles = NULL; 309} 310 311/* 312 * Utility function to gather stats (objset and zpl) for the given object. 313 */ 314static int 315get_stats_ioctl(zfs_handle_t *zhp, zfs_cmd_t *zc) 316{ 317 libzfs_handle_t *hdl = zhp->zfs_hdl; 318 319 (void) strlcpy(zc->zc_name, zhp->zfs_name, sizeof (zc->zc_name)); 320 321 while (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_STATS, zc) != 0) { 322 if (errno == ENOMEM) { 323 if (zcmd_expand_dst_nvlist(hdl, zc) != 0) { 324 return (-1); 325 } 326 } else { 327 return (-1); 328 } 329 } 330 return (0); 331} 332 333/* 334 * Utility function to get the received properties of the given object. 335 */ 336static int 337get_recvd_props_ioctl(zfs_handle_t *zhp) 338{ 339 libzfs_handle_t *hdl = zhp->zfs_hdl; 340 nvlist_t *recvdprops; 341 zfs_cmd_t zc = { 0 }; 342 int err; 343 344 if (zcmd_alloc_dst_nvlist(hdl, &zc, 0) != 0) 345 return (-1); 346 347 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 348 349 while (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_RECVD_PROPS, &zc) != 0) { 350 if (errno == ENOMEM) { 351 if (zcmd_expand_dst_nvlist(hdl, &zc) != 0) { 352 return (-1); 353 } 354 } else { 355 zcmd_free_nvlists(&zc); 356 return (-1); 357 } 358 } 359 360 err = zcmd_read_dst_nvlist(zhp->zfs_hdl, &zc, &recvdprops); 361 zcmd_free_nvlists(&zc); 362 if (err != 0) 363 return (-1); 364 365 nvlist_free(zhp->zfs_recvd_props); 366 zhp->zfs_recvd_props = recvdprops; 367 368 return (0); 369} 370 371static int 372put_stats_zhdl(zfs_handle_t *zhp, zfs_cmd_t *zc) 373{ 374 nvlist_t *allprops, *userprops; 375 376 zhp->zfs_dmustats = zc->zc_objset_stats; /* structure assignment */ 377 378 if (zcmd_read_dst_nvlist(zhp->zfs_hdl, zc, &allprops) != 0) { 379 return (-1); 380 } 381 382 /* 383 * XXX Why do we store the user props separately, in addition to 384 * storing them in zfs_props? 385 */ 386 if ((userprops = process_user_props(zhp, allprops)) == NULL) { 387 nvlist_free(allprops); 388 return (-1); 389 } 390 391 nvlist_free(zhp->zfs_props); 392 nvlist_free(zhp->zfs_user_props); 393 394 zhp->zfs_props = allprops; 395 zhp->zfs_user_props = userprops; 396 397 return (0); 398} 399 400static int 401get_stats(zfs_handle_t *zhp) 402{ 403 int rc = 0; 404 zfs_cmd_t zc = { 0 }; 405 406 if (zcmd_alloc_dst_nvlist(zhp->zfs_hdl, &zc, 0) != 0) 407 return (-1); 408 if (get_stats_ioctl(zhp, &zc) != 0) 409 rc = -1; 410 else if (put_stats_zhdl(zhp, &zc) != 0) 411 rc = -1; 412 zcmd_free_nvlists(&zc); 413 return (rc); 414} 415 416/* 417 * Refresh the properties currently stored in the handle. 418 */ 419void 420zfs_refresh_properties(zfs_handle_t *zhp) 421{ 422 (void) get_stats(zhp); 423} 424 425/* 426 * Makes a handle from the given dataset name. Used by zfs_open() and 427 * zfs_iter_* to create child handles on the fly. 428 */ 429static int 430make_dataset_handle_common(zfs_handle_t *zhp, zfs_cmd_t *zc) 431{ 432 if (put_stats_zhdl(zhp, zc) != 0) 433 return (-1); 434 435 /* 436 * We've managed to open the dataset and gather statistics. Determine 437 * the high-level type. 438 */ 439 if (zhp->zfs_dmustats.dds_type == DMU_OST_ZVOL) 440 zhp->zfs_head_type = ZFS_TYPE_VOLUME; 441 else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZFS) 442 zhp->zfs_head_type = ZFS_TYPE_FILESYSTEM; 443 else if (zhp->zfs_dmustats.dds_type == DMU_OST_OTHER) 444 return (-1); 445 else 446 abort(); 447 448 if (zhp->zfs_dmustats.dds_is_snapshot) 449 zhp->zfs_type = ZFS_TYPE_SNAPSHOT; 450 else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZVOL) 451 zhp->zfs_type = ZFS_TYPE_VOLUME; 452 else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZFS) 453 zhp->zfs_type = ZFS_TYPE_FILESYSTEM; 454 else 455 abort(); /* we should never see any other types */ 456 457 if ((zhp->zpool_hdl = zpool_handle(zhp)) == NULL) 458 return (-1); 459 460 return (0); 461} 462 463zfs_handle_t * 464make_dataset_handle(libzfs_handle_t *hdl, const char *path) 465{ 466 zfs_cmd_t zc = { 0 }; 467 468 zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1); 469 470 if (zhp == NULL) 471 return (NULL); 472 473 zhp->zfs_hdl = hdl; 474 (void) strlcpy(zhp->zfs_name, path, sizeof (zhp->zfs_name)); 475 if (zcmd_alloc_dst_nvlist(hdl, &zc, 0) != 0) { 476 free(zhp); 477 return (NULL); 478 } 479 if (get_stats_ioctl(zhp, &zc) == -1) { 480 zcmd_free_nvlists(&zc); 481 free(zhp); 482 return (NULL); 483 } 484 if (make_dataset_handle_common(zhp, &zc) == -1) { 485 free(zhp); 486 zhp = NULL; 487 } 488 zcmd_free_nvlists(&zc); 489 return (zhp); 490} 491 492zfs_handle_t * 493make_dataset_handle_zc(libzfs_handle_t *hdl, zfs_cmd_t *zc) 494{ 495 zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1); 496 497 if (zhp == NULL) 498 return (NULL); 499 500 zhp->zfs_hdl = hdl; 501 (void) strlcpy(zhp->zfs_name, zc->zc_name, sizeof (zhp->zfs_name)); 502 if (make_dataset_handle_common(zhp, zc) == -1) { 503 free(zhp); 504 return (NULL); 505 } 506 return (zhp); 507} 508 509zfs_handle_t * 510make_dataset_simple_handle_zc(zfs_handle_t *pzhp, zfs_cmd_t *zc) 511{ 512 zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1); 513 514 if (zhp == NULL) 515 return (NULL); 516 517 zhp->zfs_hdl = pzhp->zfs_hdl; 518 (void) strlcpy(zhp->zfs_name, zc->zc_name, sizeof (zhp->zfs_name)); 519 zhp->zfs_head_type = pzhp->zfs_type; 520 zhp->zfs_type = ZFS_TYPE_SNAPSHOT; 521 zhp->zpool_hdl = zpool_handle(zhp); 522 return (zhp); 523} 524 525zfs_handle_t * 526zfs_handle_dup(zfs_handle_t *zhp_orig) 527{ 528 zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1); 529 530 if (zhp == NULL) 531 return (NULL); 532 533 zhp->zfs_hdl = zhp_orig->zfs_hdl; 534 zhp->zpool_hdl = zhp_orig->zpool_hdl; 535 (void) strlcpy(zhp->zfs_name, zhp_orig->zfs_name, 536 sizeof (zhp->zfs_name)); 537 zhp->zfs_type = zhp_orig->zfs_type; 538 zhp->zfs_head_type = zhp_orig->zfs_head_type; 539 zhp->zfs_dmustats = zhp_orig->zfs_dmustats; 540 if (zhp_orig->zfs_props != NULL) { 541 if (nvlist_dup(zhp_orig->zfs_props, &zhp->zfs_props, 0) != 0) { 542 (void) no_memory(zhp->zfs_hdl); 543 zfs_close(zhp); 544 return (NULL); 545 } 546 } 547 if (zhp_orig->zfs_user_props != NULL) { 548 if (nvlist_dup(zhp_orig->zfs_user_props, 549 &zhp->zfs_user_props, 0) != 0) { 550 (void) no_memory(zhp->zfs_hdl); 551 zfs_close(zhp); 552 return (NULL); 553 } 554 } 555 if (zhp_orig->zfs_recvd_props != NULL) { 556 if (nvlist_dup(zhp_orig->zfs_recvd_props, 557 &zhp->zfs_recvd_props, 0)) { 558 (void) no_memory(zhp->zfs_hdl); 559 zfs_close(zhp); 560 return (NULL); 561 } 562 } 563 zhp->zfs_mntcheck = zhp_orig->zfs_mntcheck; 564 if (zhp_orig->zfs_mntopts != NULL) { 565 zhp->zfs_mntopts = zfs_strdup(zhp_orig->zfs_hdl, 566 zhp_orig->zfs_mntopts); 567 } 568 zhp->zfs_props_table = zhp_orig->zfs_props_table; 569 return (zhp); 570} 571 572boolean_t 573zfs_bookmark_exists(const char *path) 574{ 575 nvlist_t *bmarks; 576 nvlist_t *props; 577 char fsname[ZFS_MAX_DATASET_NAME_LEN]; 578 char *bmark_name; 579 char *pound; 580 int err; 581 boolean_t rv; 582 583 584 (void) strlcpy(fsname, path, sizeof (fsname)); 585 pound = strchr(fsname, '#'); 586 if (pound == NULL) 587 return (B_FALSE); 588 589 *pound = '\0'; 590 bmark_name = pound + 1; 591 props = fnvlist_alloc(); 592 err = lzc_get_bookmarks(fsname, props, &bmarks); 593 nvlist_free(props); 594 if (err != 0) { 595 nvlist_free(bmarks); 596 return (B_FALSE); 597 } 598 599 rv = nvlist_exists(bmarks, bmark_name); 600 nvlist_free(bmarks); 601 return (rv); 602} 603 604zfs_handle_t * 605make_bookmark_handle(zfs_handle_t *parent, const char *path, 606 nvlist_t *bmark_props) 607{ 608 zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1); 609 610 if (zhp == NULL) 611 return (NULL); 612 613 /* Fill in the name. */ 614 zhp->zfs_hdl = parent->zfs_hdl; 615 (void) strlcpy(zhp->zfs_name, path, sizeof (zhp->zfs_name)); 616 617 /* Set the property lists. */ 618 if (nvlist_dup(bmark_props, &zhp->zfs_props, 0) != 0) { 619 free(zhp); 620 return (NULL); 621 } 622 623 /* Set the types. */ 624 zhp->zfs_head_type = parent->zfs_head_type; 625 zhp->zfs_type = ZFS_TYPE_BOOKMARK; 626 627 if ((zhp->zpool_hdl = zpool_handle(zhp)) == NULL) { 628 nvlist_free(zhp->zfs_props); 629 free(zhp); 630 return (NULL); 631 } 632 633 return (zhp); 634} 635 636struct zfs_open_bookmarks_cb_data { 637 const char *path; 638 zfs_handle_t *zhp; 639}; 640 641static int 642zfs_open_bookmarks_cb(zfs_handle_t *zhp, void *data) 643{ 644 struct zfs_open_bookmarks_cb_data *dp = data; 645 646 /* 647 * Is it the one we are looking for? 648 */ 649 if (strcmp(dp->path, zfs_get_name(zhp)) == 0) { 650 /* 651 * We found it. Save it and let the caller know we are done. 652 */ 653 dp->zhp = zhp; 654 return (EEXIST); 655 } 656 657 /* 658 * Not found. Close the handle and ask for another one. 659 */ 660 zfs_close(zhp); 661 return (0); 662} 663 664/* 665 * Opens the given snapshot, bookmark, filesystem, or volume. The 'types' 666 * argument is a mask of acceptable types. The function will print an 667 * appropriate error message and return NULL if it can't be opened. 668 */ 669zfs_handle_t * 670zfs_open(libzfs_handle_t *hdl, const char *path, int types) 671{ 672 zfs_handle_t *zhp; 673 char errbuf[1024]; 674 char *bookp; 675 676 (void) snprintf(errbuf, sizeof (errbuf), 677 dgettext(TEXT_DOMAIN, "cannot open '%s'"), path); 678 679 /* 680 * Validate the name before we even try to open it. 681 */ 682 if (!zfs_validate_name(hdl, path, types, B_FALSE)) { 683 (void) zfs_error(hdl, EZFS_INVALIDNAME, errbuf); 684 return (NULL); 685 } 686 687 /* 688 * Bookmarks needs to be handled separately. 689 */ 690 bookp = strchr(path, '#'); 691 if (bookp == NULL) { 692 /* 693 * Try to get stats for the dataset, which will tell us if it 694 * exists. 695 */ 696 errno = 0; 697 if ((zhp = make_dataset_handle(hdl, path)) == NULL) { 698 (void) zfs_standard_error(hdl, errno, errbuf); 699 return (NULL); 700 } 701 } else { 702 char dsname[ZFS_MAX_DATASET_NAME_LEN]; 703 zfs_handle_t *pzhp; 704 struct zfs_open_bookmarks_cb_data cb_data = {path, NULL}; 705 706 /* 707 * We need to cut out '#' and everything after '#' 708 * to get the parent dataset name only. 709 */ 710 assert(bookp - path < sizeof (dsname)); 711 (void) strncpy(dsname, path, bookp - path); 712 dsname[bookp - path] = '\0'; 713 714 /* 715 * Create handle for the parent dataset. 716 */ 717 errno = 0; 718 if ((pzhp = make_dataset_handle(hdl, dsname)) == NULL) { 719 (void) zfs_standard_error(hdl, errno, errbuf); 720 return (NULL); 721 } 722 723 /* 724 * Iterate bookmarks to find the right one. 725 */ 726 errno = 0; 727 if ((zfs_iter_bookmarks(pzhp, zfs_open_bookmarks_cb, 728 &cb_data) == 0) && (cb_data.zhp == NULL)) { 729 (void) zfs_error(hdl, EZFS_NOENT, errbuf); 730 zfs_close(pzhp); 731 return (NULL); 732 } 733 if (cb_data.zhp == NULL) { 734 (void) zfs_standard_error(hdl, errno, errbuf); 735 zfs_close(pzhp); 736 return (NULL); 737 } 738 zhp = cb_data.zhp; 739 740 /* 741 * Cleanup. 742 */ 743 zfs_close(pzhp); 744 } 745 746 if (zhp == NULL) { 747 char *at = strchr(path, '@'); 748 749 if (at != NULL) 750 *at = '\0'; 751 errno = 0; 752 if ((zhp = make_dataset_handle(hdl, path)) == NULL) { 753 (void) zfs_standard_error(hdl, errno, errbuf); 754 return (NULL); 755 } 756 if (at != NULL) 757 *at = '@'; 758 (void) strlcpy(zhp->zfs_name, path, sizeof (zhp->zfs_name)); 759 zhp->zfs_type = ZFS_TYPE_SNAPSHOT; 760 } 761 762 if (!(types & zhp->zfs_type)) { 763 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf); 764 zfs_close(zhp); 765 return (NULL); 766 } 767 768 return (zhp); 769} 770 771/* 772 * Release a ZFS handle. Nothing to do but free the associated memory. 773 */ 774void 775zfs_close(zfs_handle_t *zhp) 776{ 777 if (zhp->zfs_mntopts) 778 free(zhp->zfs_mntopts); 779 nvlist_free(zhp->zfs_props); 780 nvlist_free(zhp->zfs_user_props); 781 nvlist_free(zhp->zfs_recvd_props); 782 free(zhp); 783} 784 785typedef struct mnttab_node { 786 struct mnttab mtn_mt; 787 avl_node_t mtn_node; 788} mnttab_node_t; 789 790static int 791libzfs_mnttab_cache_compare(const void *arg1, const void *arg2) 792{ 793 const mnttab_node_t *mtn1 = (const mnttab_node_t *)arg1; 794 const mnttab_node_t *mtn2 = (const mnttab_node_t *)arg2; 795 int rv; 796 797 rv = strcmp(mtn1->mtn_mt.mnt_special, mtn2->mtn_mt.mnt_special); 798 799 return (AVL_ISIGN(rv)); 800} 801 802void 803libzfs_mnttab_init(libzfs_handle_t *hdl) 804{ 805 pthread_mutex_init(&hdl->libzfs_mnttab_cache_lock, NULL); 806 assert(avl_numnodes(&hdl->libzfs_mnttab_cache) == 0); 807 avl_create(&hdl->libzfs_mnttab_cache, libzfs_mnttab_cache_compare, 808 sizeof (mnttab_node_t), offsetof(mnttab_node_t, mtn_node)); 809} 810 811void 812libzfs_mnttab_update(libzfs_handle_t *hdl) 813{ 814 struct mnttab entry; 815 816 rewind(hdl->libzfs_mnttab); 817 while (getmntent(hdl->libzfs_mnttab, &entry) == 0) { 818 mnttab_node_t *mtn; 819 820 if (strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0) 821 continue; 822 mtn = zfs_alloc(hdl, sizeof (mnttab_node_t)); 823 mtn->mtn_mt.mnt_special = zfs_strdup(hdl, entry.mnt_special); 824 mtn->mtn_mt.mnt_mountp = zfs_strdup(hdl, entry.mnt_mountp); 825 mtn->mtn_mt.mnt_fstype = zfs_strdup(hdl, entry.mnt_fstype); 826 mtn->mtn_mt.mnt_mntopts = zfs_strdup(hdl, entry.mnt_mntopts); 827 avl_add(&hdl->libzfs_mnttab_cache, mtn); 828 } 829} 830 831void 832libzfs_mnttab_fini(libzfs_handle_t *hdl) 833{ 834 void *cookie = NULL; 835 mnttab_node_t *mtn; 836 837 while ((mtn = avl_destroy_nodes(&hdl->libzfs_mnttab_cache, &cookie)) 838 != NULL) { 839 free(mtn->mtn_mt.mnt_special); 840 free(mtn->mtn_mt.mnt_mountp); 841 free(mtn->mtn_mt.mnt_fstype); 842 free(mtn->mtn_mt.mnt_mntopts); 843 free(mtn); 844 } 845 avl_destroy(&hdl->libzfs_mnttab_cache); 846 (void) pthread_mutex_destroy(&hdl->libzfs_mnttab_cache_lock); 847} 848 849void 850libzfs_mnttab_cache(libzfs_handle_t *hdl, boolean_t enable) 851{ 852 hdl->libzfs_mnttab_enable = enable; 853} 854 855int 856libzfs_mnttab_find(libzfs_handle_t *hdl, const char *fsname, 857 struct mnttab *entry) 858{ 859 mnttab_node_t find; 860 mnttab_node_t *mtn; 861 int ret = ENOENT; 862 863 if (!hdl->libzfs_mnttab_enable) { 864 struct mnttab srch = { 0 }; 865 866 if (avl_numnodes(&hdl->libzfs_mnttab_cache)) 867 libzfs_mnttab_fini(hdl); 868 rewind(hdl->libzfs_mnttab); 869 srch.mnt_special = (char *)fsname; 870 srch.mnt_fstype = MNTTYPE_ZFS; 871 if (getmntany(hdl->libzfs_mnttab, entry, &srch) == 0) 872 return (0); 873 else 874 return (ENOENT); 875 } 876 877 pthread_mutex_lock(&hdl->libzfs_mnttab_cache_lock); 878 if (avl_numnodes(&hdl->libzfs_mnttab_cache) == 0) 879 libzfs_mnttab_update(hdl); 880 881 find.mtn_mt.mnt_special = (char *)fsname; 882 mtn = avl_find(&hdl->libzfs_mnttab_cache, &find, NULL); 883 if (mtn) { 884 *entry = mtn->mtn_mt; 885 ret = 0; 886 } 887 pthread_mutex_unlock(&hdl->libzfs_mnttab_cache_lock); 888 return (ret); 889} 890 891void 892libzfs_mnttab_add(libzfs_handle_t *hdl, const char *special, 893 const char *mountp, const char *mntopts) 894{ 895 mnttab_node_t *mtn; 896 897 pthread_mutex_lock(&hdl->libzfs_mnttab_cache_lock); 898 if (avl_numnodes(&hdl->libzfs_mnttab_cache) != 0) { 899 mtn = zfs_alloc(hdl, sizeof (mnttab_node_t)); 900 mtn->mtn_mt.mnt_special = zfs_strdup(hdl, special); 901 mtn->mtn_mt.mnt_mountp = zfs_strdup(hdl, mountp); 902 mtn->mtn_mt.mnt_fstype = zfs_strdup(hdl, MNTTYPE_ZFS); 903 mtn->mtn_mt.mnt_mntopts = zfs_strdup(hdl, mntopts); 904 /* 905 * Another thread may have already added this entry 906 * via libzfs_mnttab_update. If so we should skip it. 907 */ 908 if (avl_find(&hdl->libzfs_mnttab_cache, mtn, NULL) != NULL) { 909 free(mtn->mtn_mt.mnt_special); 910 free(mtn->mtn_mt.mnt_mountp); 911 free(mtn->mtn_mt.mnt_fstype); 912 free(mtn->mtn_mt.mnt_mntopts); 913 free(mtn); 914 } else { 915 avl_add(&hdl->libzfs_mnttab_cache, mtn); 916 } 917 } 918 pthread_mutex_unlock(&hdl->libzfs_mnttab_cache_lock); 919} 920 921void 922libzfs_mnttab_remove(libzfs_handle_t *hdl, const char *fsname) 923{ 924 mnttab_node_t find; 925 mnttab_node_t *ret; 926 927 pthread_mutex_lock(&hdl->libzfs_mnttab_cache_lock); 928 find.mtn_mt.mnt_special = (char *)fsname; 929 if ((ret = avl_find(&hdl->libzfs_mnttab_cache, (void *)&find, NULL)) 930 != NULL) { 931 avl_remove(&hdl->libzfs_mnttab_cache, ret); 932 free(ret->mtn_mt.mnt_special); 933 free(ret->mtn_mt.mnt_mountp); 934 free(ret->mtn_mt.mnt_fstype); 935 free(ret->mtn_mt.mnt_mntopts); 936 free(ret); 937 } 938 pthread_mutex_unlock(&hdl->libzfs_mnttab_cache_lock); 939} 940 941int 942zfs_spa_version(zfs_handle_t *zhp, int *spa_version) 943{ 944 zpool_handle_t *zpool_handle = zhp->zpool_hdl; 945 946 if (zpool_handle == NULL) 947 return (-1); 948 949 *spa_version = zpool_get_prop_int(zpool_handle, 950 ZPOOL_PROP_VERSION, NULL); 951 return (0); 952} 953 954/* 955 * The choice of reservation property depends on the SPA version. 956 */ 957static int 958zfs_which_resv_prop(zfs_handle_t *zhp, zfs_prop_t *resv_prop) 959{ 960 int spa_version; 961 962 if (zfs_spa_version(zhp, &spa_version) < 0) 963 return (-1); 964 965 if (spa_version >= SPA_VERSION_REFRESERVATION) 966 *resv_prop = ZFS_PROP_REFRESERVATION; 967 else 968 *resv_prop = ZFS_PROP_RESERVATION; 969 970 return (0); 971} 972 973/* 974 * Given an nvlist of properties to set, validates that they are correct, and 975 * parses any numeric properties (index, boolean, etc) if they are specified as 976 * strings. 977 */ 978nvlist_t * 979zfs_valid_proplist(libzfs_handle_t *hdl, zfs_type_t type, nvlist_t *nvl, 980 uint64_t zoned, zfs_handle_t *zhp, zpool_handle_t *zpool_hdl, 981 const char *errbuf) 982{ 983 nvpair_t *elem; 984 uint64_t intval; 985 char *strval; 986 zfs_prop_t prop; 987 nvlist_t *ret; 988 int chosen_normal = -1; 989 int chosen_utf = -1; 990 991 if (nvlist_alloc(&ret, NV_UNIQUE_NAME, 0) != 0) { 992 (void) no_memory(hdl); 993 return (NULL); 994 } 995 996 /* 997 * Make sure this property is valid and applies to this type. 998 */ 999 1000 elem = NULL; 1001 while ((elem = nvlist_next_nvpair(nvl, elem)) != NULL) { 1002 const char *propname = nvpair_name(elem); 1003 1004 prop = zfs_name_to_prop(propname); 1005 if (prop == ZPROP_INVAL && zfs_prop_user(propname)) { 1006 /* 1007 * This is a user property: make sure it's a 1008 * string, and that it's less than ZAP_MAXNAMELEN. 1009 */ 1010 if (nvpair_type(elem) != DATA_TYPE_STRING) { 1011 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1012 "'%s' must be a string"), propname); 1013 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1014 goto error; 1015 } 1016 1017 if (strlen(nvpair_name(elem)) >= ZAP_MAXNAMELEN) { 1018 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1019 "property name '%s' is too long"), 1020 propname); 1021 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1022 goto error; 1023 } 1024 1025 (void) nvpair_value_string(elem, &strval); 1026 if (nvlist_add_string(ret, propname, strval) != 0) { 1027 (void) no_memory(hdl); 1028 goto error; 1029 } 1030 continue; 1031 } 1032 1033 /* 1034 * Currently, only user properties can be modified on 1035 * snapshots. 1036 */ 1037 if (type == ZFS_TYPE_SNAPSHOT) { 1038 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1039 "this property can not be modified for snapshots")); 1040 (void) zfs_error(hdl, EZFS_PROPTYPE, errbuf); 1041 goto error; 1042 } 1043 1044 if (prop == ZPROP_INVAL && zfs_prop_userquota(propname)) { 1045 zfs_userquota_prop_t uqtype; 1046 char newpropname[128]; 1047 char domain[128]; 1048 uint64_t rid; 1049 uint64_t valary[3]; 1050 1051 if (userquota_propname_decode(propname, zoned, 1052 &uqtype, domain, sizeof (domain), &rid) != 0) { 1053 zfs_error_aux(hdl, 1054 dgettext(TEXT_DOMAIN, 1055 "'%s' has an invalid user/group name"), 1056 propname); 1057 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1058 goto error; 1059 } 1060 1061 if (uqtype != ZFS_PROP_USERQUOTA && 1062 uqtype != ZFS_PROP_GROUPQUOTA) { 1063 zfs_error_aux(hdl, 1064 dgettext(TEXT_DOMAIN, "'%s' is readonly"), 1065 propname); 1066 (void) zfs_error(hdl, EZFS_PROPREADONLY, 1067 errbuf); 1068 goto error; 1069 } 1070 1071 if (nvpair_type(elem) == DATA_TYPE_STRING) { 1072 (void) nvpair_value_string(elem, &strval); 1073 if (strcmp(strval, "none") == 0) { 1074 intval = 0; 1075 } else if (zfs_nicestrtonum(hdl, 1076 strval, &intval) != 0) { 1077 (void) zfs_error(hdl, 1078 EZFS_BADPROP, errbuf); 1079 goto error; 1080 } 1081 } else if (nvpair_type(elem) == 1082 DATA_TYPE_UINT64) { 1083 (void) nvpair_value_uint64(elem, &intval); 1084 if (intval == 0) { 1085 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1086 "use 'none' to disable " 1087 "userquota/groupquota")); 1088 goto error; 1089 } 1090 } else { 1091 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1092 "'%s' must be a number"), propname); 1093 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1094 goto error; 1095 } 1096 1097 /* 1098 * Encode the prop name as 1099 * userquota@<hex-rid>-domain, to make it easy 1100 * for the kernel to decode. 1101 */ 1102 (void) snprintf(newpropname, sizeof (newpropname), 1103 "%s%llx-%s", zfs_userquota_prop_prefixes[uqtype], 1104 (longlong_t)rid, domain); 1105 valary[0] = uqtype; 1106 valary[1] = rid; 1107 valary[2] = intval; 1108 if (nvlist_add_uint64_array(ret, newpropname, 1109 valary, 3) != 0) { 1110 (void) no_memory(hdl); 1111 goto error; 1112 } 1113 continue; 1114 } else if (prop == ZPROP_INVAL && zfs_prop_written(propname)) { 1115 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1116 "'%s' is readonly"), 1117 propname); 1118 (void) zfs_error(hdl, EZFS_PROPREADONLY, errbuf); 1119 goto error; 1120 } 1121 1122 if (prop == ZPROP_INVAL) { 1123 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1124 "invalid property '%s'"), propname); 1125 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1126 goto error; 1127 } 1128 1129 if (!zfs_prop_valid_for_type(prop, type)) { 1130 zfs_error_aux(hdl, 1131 dgettext(TEXT_DOMAIN, "'%s' does not " 1132 "apply to datasets of this type"), propname); 1133 (void) zfs_error(hdl, EZFS_PROPTYPE, errbuf); 1134 goto error; 1135 } 1136 1137 if (zfs_prop_readonly(prop) && 1138 (!zfs_prop_setonce(prop) || zhp != NULL)) { 1139 zfs_error_aux(hdl, 1140 dgettext(TEXT_DOMAIN, "'%s' is readonly"), 1141 propname); 1142 (void) zfs_error(hdl, EZFS_PROPREADONLY, errbuf); 1143 goto error; 1144 } 1145 1146 if (zprop_parse_value(hdl, elem, prop, type, ret, 1147 &strval, &intval, errbuf) != 0) 1148 goto error; 1149 1150 /* 1151 * Perform some additional checks for specific properties. 1152 */ 1153 switch (prop) { 1154 case ZFS_PROP_VERSION: 1155 { 1156 int version; 1157 1158 if (zhp == NULL) 1159 break; 1160 version = zfs_prop_get_int(zhp, ZFS_PROP_VERSION); 1161 if (intval < version) { 1162 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1163 "Can not downgrade; already at version %u"), 1164 version); 1165 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1166 goto error; 1167 } 1168 break; 1169 } 1170 1171 case ZFS_PROP_VOLBLOCKSIZE: 1172 case ZFS_PROP_RECORDSIZE: 1173 { 1174 int maxbs = SPA_MAXBLOCKSIZE; 1175 if (zpool_hdl != NULL) { 1176 maxbs = zpool_get_prop_int(zpool_hdl, 1177 ZPOOL_PROP_MAXBLOCKSIZE, NULL); 1178 } 1179 /* 1180 * Volumes are limited to a volblocksize of 128KB, 1181 * because they typically service workloads with 1182 * small random writes, which incur a large performance 1183 * penalty with large blocks. 1184 */ 1185 if (prop == ZFS_PROP_VOLBLOCKSIZE) 1186 maxbs = SPA_OLD_MAXBLOCKSIZE; 1187 /* 1188 * The value must be a power of two between 1189 * SPA_MINBLOCKSIZE and maxbs. 1190 */ 1191 if (intval < SPA_MINBLOCKSIZE || 1192 intval > maxbs || !ISP2(intval)) { 1193 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1194 "'%s' must be power of 2 from 512B " 1195 "to %uKB"), propname, maxbs >> 10); 1196 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1197 goto error; 1198 } 1199 break; 1200 } 1201 1202 case ZFS_PROP_SPECIAL_SMALL_BLOCKS: 1203 if (zpool_hdl != NULL) { 1204 char state[64] = ""; 1205 1206 /* 1207 * Issue a warning but do not fail so that 1208 * tests for setable properties succeed. 1209 */ 1210 if (zpool_prop_get_feature(zpool_hdl, 1211 "feature@allocation_classes", state, 1212 sizeof (state)) != 0 || 1213 strcmp(state, ZFS_FEATURE_ACTIVE) != 0) { 1214 (void) fprintf(stderr, gettext( 1215 "%s: property requires a special " 1216 "device in the pool\n"), propname); 1217 } 1218 } 1219 if (intval != 0 && 1220 (intval < SPA_MINBLOCKSIZE || 1221 intval > SPA_OLD_MAXBLOCKSIZE || !ISP2(intval))) { 1222 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1223 "invalid '%s=%d' property: must be zero or " 1224 "a power of 2 from 512B to 128K"), propname, 1225 intval); 1226 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1227 goto error; 1228 } 1229 break; 1230 1231 case ZFS_PROP_MLSLABEL: 1232 { 1233#ifdef illumos 1234 /* 1235 * Verify the mlslabel string and convert to 1236 * internal hex label string. 1237 */ 1238 1239 m_label_t *new_sl; 1240 char *hex = NULL; /* internal label string */ 1241 1242 /* Default value is already OK. */ 1243 if (strcasecmp(strval, ZFS_MLSLABEL_DEFAULT) == 0) 1244 break; 1245 1246 /* Verify the label can be converted to binary form */ 1247 if (((new_sl = m_label_alloc(MAC_LABEL)) == NULL) || 1248 (str_to_label(strval, &new_sl, MAC_LABEL, 1249 L_NO_CORRECTION, NULL) == -1)) { 1250 goto badlabel; 1251 } 1252 1253 /* Now translate to hex internal label string */ 1254 if (label_to_str(new_sl, &hex, M_INTERNAL, 1255 DEF_NAMES) != 0) { 1256 if (hex) 1257 free(hex); 1258 goto badlabel; 1259 } 1260 m_label_free(new_sl); 1261 1262 /* If string is already in internal form, we're done. */ 1263 if (strcmp(strval, hex) == 0) { 1264 free(hex); 1265 break; 1266 } 1267 1268 /* Replace the label string with the internal form. */ 1269 (void) nvlist_remove(ret, zfs_prop_to_name(prop), 1270 DATA_TYPE_STRING); 1271 verify(nvlist_add_string(ret, zfs_prop_to_name(prop), 1272 hex) == 0); 1273 free(hex); 1274 1275 break; 1276 1277badlabel: 1278 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1279 "invalid mlslabel '%s'"), strval); 1280 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1281 m_label_free(new_sl); /* OK if null */ 1282#else /* !illumos */ 1283 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1284 "mlslabel is not supported on FreeBSD")); 1285 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1286#endif /* illumos */ 1287 goto error; 1288 1289 } 1290 1291 case ZFS_PROP_MOUNTPOINT: 1292 { 1293 namecheck_err_t why; 1294 1295 if (strcmp(strval, ZFS_MOUNTPOINT_NONE) == 0 || 1296 strcmp(strval, ZFS_MOUNTPOINT_LEGACY) == 0) 1297 break; 1298 1299 if (mountpoint_namecheck(strval, &why)) { 1300 switch (why) { 1301 case NAME_ERR_LEADING_SLASH: 1302 zfs_error_aux(hdl, 1303 dgettext(TEXT_DOMAIN, 1304 "'%s' must be an absolute path, " 1305 "'none', or 'legacy'"), propname); 1306 break; 1307 case NAME_ERR_TOOLONG: 1308 zfs_error_aux(hdl, 1309 dgettext(TEXT_DOMAIN, 1310 "component of '%s' is too long"), 1311 propname); 1312 break; 1313 1314 default: 1315 zfs_error_aux(hdl, 1316 dgettext(TEXT_DOMAIN, 1317 "(%d) not defined"), 1318 why); 1319 break; 1320 } 1321 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1322 goto error; 1323 } 1324 } 1325 1326 /*FALLTHRU*/ 1327 1328 case ZFS_PROP_SHARESMB: 1329 case ZFS_PROP_SHARENFS: 1330 /* 1331 * For the mountpoint and sharenfs or sharesmb 1332 * properties, check if it can be set in a 1333 * global/non-global zone based on 1334 * the zoned property value: 1335 * 1336 * global zone non-global zone 1337 * -------------------------------------------------- 1338 * zoned=on mountpoint (no) mountpoint (yes) 1339 * sharenfs (no) sharenfs (no) 1340 * sharesmb (no) sharesmb (no) 1341 * 1342 * zoned=off mountpoint (yes) N/A 1343 * sharenfs (yes) 1344 * sharesmb (yes) 1345 */ 1346 if (zoned) { 1347 if (getzoneid() == GLOBAL_ZONEID) { 1348 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1349 "'%s' cannot be set on " 1350 "dataset in a non-global zone"), 1351 propname); 1352 (void) zfs_error(hdl, EZFS_ZONED, 1353 errbuf); 1354 goto error; 1355 } else if (prop == ZFS_PROP_SHARENFS || 1356 prop == ZFS_PROP_SHARESMB) { 1357 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1358 "'%s' cannot be set in " 1359 "a non-global zone"), propname); 1360 (void) zfs_error(hdl, EZFS_ZONED, 1361 errbuf); 1362 goto error; 1363 } 1364 } else if (getzoneid() != GLOBAL_ZONEID) { 1365 /* 1366 * If zoned property is 'off', this must be in 1367 * a global zone. If not, something is wrong. 1368 */ 1369 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1370 "'%s' cannot be set while dataset " 1371 "'zoned' property is set"), propname); 1372 (void) zfs_error(hdl, EZFS_ZONED, errbuf); 1373 goto error; 1374 } 1375 1376 /* 1377 * At this point, it is legitimate to set the 1378 * property. Now we want to make sure that the 1379 * property value is valid if it is sharenfs. 1380 */ 1381 if ((prop == ZFS_PROP_SHARENFS || 1382 prop == ZFS_PROP_SHARESMB) && 1383 strcmp(strval, "on") != 0 && 1384 strcmp(strval, "off") != 0) { 1385 zfs_share_proto_t proto; 1386 1387 if (prop == ZFS_PROP_SHARESMB) 1388 proto = PROTO_SMB; 1389 else 1390 proto = PROTO_NFS; 1391 1392 /* 1393 * Must be an valid sharing protocol 1394 * option string so init the libshare 1395 * in order to enable the parser and 1396 * then parse the options. We use the 1397 * control API since we don't care about 1398 * the current configuration and don't 1399 * want the overhead of loading it 1400 * until we actually do something. 1401 */ 1402 1403 if (zfs_init_libshare(hdl, 1404 SA_INIT_CONTROL_API) != SA_OK) { 1405 /* 1406 * An error occurred so we can't do 1407 * anything 1408 */ 1409 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1410 "'%s' cannot be set: problem " 1411 "in share initialization"), 1412 propname); 1413 (void) zfs_error(hdl, EZFS_BADPROP, 1414 errbuf); 1415 goto error; 1416 } 1417 1418 if (zfs_parse_options(strval, proto) != SA_OK) { 1419 /* 1420 * There was an error in parsing so 1421 * deal with it by issuing an error 1422 * message and leaving after 1423 * uninitializing the the libshare 1424 * interface. 1425 */ 1426 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1427 "'%s' cannot be set to invalid " 1428 "options"), propname); 1429 (void) zfs_error(hdl, EZFS_BADPROP, 1430 errbuf); 1431 zfs_uninit_libshare(hdl); 1432 goto error; 1433 } 1434 zfs_uninit_libshare(hdl); 1435 } 1436 1437 break; 1438 1439 case ZFS_PROP_UTF8ONLY: 1440 chosen_utf = (int)intval; 1441 break; 1442 1443 case ZFS_PROP_NORMALIZE: 1444 chosen_normal = (int)intval; 1445 break; 1446 1447 default: 1448 break; 1449 } 1450 1451 /* 1452 * For changes to existing volumes, we have some additional 1453 * checks to enforce. 1454 */ 1455 if (type == ZFS_TYPE_VOLUME && zhp != NULL) { 1456 uint64_t volsize = zfs_prop_get_int(zhp, 1457 ZFS_PROP_VOLSIZE); 1458 uint64_t blocksize = zfs_prop_get_int(zhp, 1459 ZFS_PROP_VOLBLOCKSIZE); 1460 char buf[64]; 1461 1462 switch (prop) { 1463 case ZFS_PROP_RESERVATION: 1464 if (intval > volsize) { 1465 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1466 "'%s' is greater than current " 1467 "volume size"), propname); 1468 (void) zfs_error(hdl, EZFS_BADPROP, 1469 errbuf); 1470 goto error; 1471 } 1472 break; 1473 1474 case ZFS_PROP_REFRESERVATION: 1475 if (intval > volsize && intval != UINT64_MAX) { 1476 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1477 "'%s' is greater than current " 1478 "volume size"), propname); 1479 (void) zfs_error(hdl, EZFS_BADPROP, 1480 errbuf); 1481 goto error; 1482 } 1483 break; 1484 1485 case ZFS_PROP_VOLSIZE: 1486 if (intval % blocksize != 0) { 1487 zfs_nicenum(blocksize, buf, 1488 sizeof (buf)); 1489 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1490 "'%s' must be a multiple of " 1491 "volume block size (%s)"), 1492 propname, buf); 1493 (void) zfs_error(hdl, EZFS_BADPROP, 1494 errbuf); 1495 goto error; 1496 } 1497 1498 if (intval == 0) { 1499 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1500 "'%s' cannot be zero"), 1501 propname); 1502 (void) zfs_error(hdl, EZFS_BADPROP, 1503 errbuf); 1504 goto error; 1505 } 1506 break; 1507 1508 default: 1509 break; 1510 } 1511 } 1512 } 1513 1514 /* 1515 * If normalization was chosen, but no UTF8 choice was made, 1516 * enforce rejection of non-UTF8 names. 1517 * 1518 * If normalization was chosen, but rejecting non-UTF8 names 1519 * was explicitly not chosen, it is an error. 1520 */ 1521 if (chosen_normal > 0 && chosen_utf < 0) { 1522 if (nvlist_add_uint64(ret, 1523 zfs_prop_to_name(ZFS_PROP_UTF8ONLY), 1) != 0) { 1524 (void) no_memory(hdl); 1525 goto error; 1526 } 1527 } else if (chosen_normal > 0 && chosen_utf == 0) { 1528 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1529 "'%s' must be set 'on' if normalization chosen"), 1530 zfs_prop_to_name(ZFS_PROP_UTF8ONLY)); 1531 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1532 goto error; 1533 } 1534 return (ret); 1535 1536error: 1537 nvlist_free(ret); 1538 return (NULL); 1539} 1540 1541int 1542zfs_add_synthetic_resv(zfs_handle_t *zhp, nvlist_t *nvl) 1543{ 1544 uint64_t old_volsize; 1545 uint64_t new_volsize; 1546 uint64_t old_reservation; 1547 uint64_t new_reservation; 1548 zfs_prop_t resv_prop; 1549 nvlist_t *props; 1550 1551 /* 1552 * If this is an existing volume, and someone is setting the volsize, 1553 * make sure that it matches the reservation, or add it if necessary. 1554 */ 1555 old_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE); 1556 if (zfs_which_resv_prop(zhp, &resv_prop) < 0) 1557 return (-1); 1558 old_reservation = zfs_prop_get_int(zhp, resv_prop); 1559 1560 props = fnvlist_alloc(); 1561 fnvlist_add_uint64(props, zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE), 1562 zfs_prop_get_int(zhp, ZFS_PROP_VOLBLOCKSIZE)); 1563 1564 if ((zvol_volsize_to_reservation(old_volsize, props) != 1565 old_reservation) || nvlist_exists(nvl, 1566 zfs_prop_to_name(resv_prop))) { 1567 fnvlist_free(props); 1568 return (0); 1569 } 1570 if (nvlist_lookup_uint64(nvl, zfs_prop_to_name(ZFS_PROP_VOLSIZE), 1571 &new_volsize) != 0) { 1572 fnvlist_free(props); 1573 return (-1); 1574 } 1575 new_reservation = zvol_volsize_to_reservation(new_volsize, props); 1576 fnvlist_free(props); 1577 1578 if (nvlist_add_uint64(nvl, zfs_prop_to_name(resv_prop), 1579 new_reservation) != 0) { 1580 (void) no_memory(zhp->zfs_hdl); 1581 return (-1); 1582 } 1583 return (1); 1584} 1585 1586/* 1587 * Helper for 'zfs {set|clone} refreservation=auto'. Must be called after 1588 * zfs_valid_proplist(), as it is what sets the UINT64_MAX sentinal value. 1589 * Return codes must match zfs_add_synthetic_resv(). 1590 */ 1591static int 1592zfs_fix_auto_resv(zfs_handle_t *zhp, nvlist_t *nvl) 1593{ 1594 uint64_t volsize; 1595 uint64_t resvsize; 1596 zfs_prop_t prop; 1597 nvlist_t *props; 1598 1599 if (!ZFS_IS_VOLUME(zhp)) { 1600 return (0); 1601 } 1602 1603 if (zfs_which_resv_prop(zhp, &prop) != 0) { 1604 return (-1); 1605 } 1606 1607 if (prop != ZFS_PROP_REFRESERVATION) { 1608 return (0); 1609 } 1610 1611 if (nvlist_lookup_uint64(nvl, zfs_prop_to_name(prop), &resvsize) != 0) { 1612 /* No value being set, so it can't be "auto" */ 1613 return (0); 1614 } 1615 if (resvsize != UINT64_MAX) { 1616 /* Being set to a value other than "auto" */ 1617 return (0); 1618 } 1619 1620 props = fnvlist_alloc(); 1621 1622 fnvlist_add_uint64(props, zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE), 1623 zfs_prop_get_int(zhp, ZFS_PROP_VOLBLOCKSIZE)); 1624 1625 if (nvlist_lookup_uint64(nvl, zfs_prop_to_name(ZFS_PROP_VOLSIZE), 1626 &volsize) != 0) { 1627 volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE); 1628 } 1629 1630 resvsize = zvol_volsize_to_reservation(volsize, props); 1631 fnvlist_free(props); 1632 1633 (void) nvlist_remove_all(nvl, zfs_prop_to_name(prop)); 1634 if (nvlist_add_uint64(nvl, zfs_prop_to_name(prop), resvsize) != 0) { 1635 (void) no_memory(zhp->zfs_hdl); 1636 return (-1); 1637 } 1638 return (1); 1639} 1640 1641void 1642zfs_setprop_error(libzfs_handle_t *hdl, zfs_prop_t prop, int err, 1643 char *errbuf) 1644{ 1645 switch (err) { 1646 1647 case ENOSPC: 1648 /* 1649 * For quotas and reservations, ENOSPC indicates 1650 * something different; setting a quota or reservation 1651 * doesn't use any disk space. 1652 */ 1653 switch (prop) { 1654 case ZFS_PROP_QUOTA: 1655 case ZFS_PROP_REFQUOTA: 1656 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1657 "size is less than current used or " 1658 "reserved space")); 1659 (void) zfs_error(hdl, EZFS_PROPSPACE, errbuf); 1660 break; 1661 1662 case ZFS_PROP_RESERVATION: 1663 case ZFS_PROP_REFRESERVATION: 1664 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1665 "size is greater than available space")); 1666 (void) zfs_error(hdl, EZFS_PROPSPACE, errbuf); 1667 break; 1668 1669 default: 1670 (void) zfs_standard_error(hdl, err, errbuf); 1671 break; 1672 } 1673 break; 1674 1675 case EBUSY: 1676 (void) zfs_standard_error(hdl, EBUSY, errbuf); 1677 break; 1678 1679 case EROFS: 1680 (void) zfs_error(hdl, EZFS_DSREADONLY, errbuf); 1681 break; 1682 1683 case E2BIG: 1684 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1685 "property value too long")); 1686 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1687 break; 1688 1689 case ENOTSUP: 1690 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1691 "pool and or dataset must be upgraded to set this " 1692 "property or value")); 1693 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf); 1694 break; 1695 1696 case ERANGE: 1697 case EDOM: 1698 if (prop == ZFS_PROP_COMPRESSION || 1699 prop == ZFS_PROP_RECORDSIZE) { 1700 (void) zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1701 "property setting is not allowed on " 1702 "bootable datasets")); 1703 (void) zfs_error(hdl, EZFS_NOTSUP, errbuf); 1704 } else if (prop == ZFS_PROP_CHECKSUM || 1705 prop == ZFS_PROP_DEDUP) { 1706 (void) zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1707 "property setting is not allowed on " 1708 "root pools")); 1709 (void) zfs_error(hdl, EZFS_NOTSUP, errbuf); 1710 } else { 1711 (void) zfs_standard_error(hdl, err, errbuf); 1712 } 1713 break; 1714 1715 case EINVAL: 1716 if (prop == ZPROP_INVAL) { 1717 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1718 } else { 1719 (void) zfs_standard_error(hdl, err, errbuf); 1720 } 1721 break; 1722 1723 case EOVERFLOW: 1724 /* 1725 * This platform can't address a volume this big. 1726 */ 1727#ifdef _ILP32 1728 if (prop == ZFS_PROP_VOLSIZE) { 1729 (void) zfs_error(hdl, EZFS_VOLTOOBIG, errbuf); 1730 break; 1731 } 1732#endif 1733 /* FALLTHROUGH */ 1734 default: 1735 (void) zfs_standard_error(hdl, err, errbuf); 1736 } 1737} 1738 1739/* 1740 * Given a property name and value, set the property for the given dataset. 1741 */ 1742int 1743zfs_prop_set(zfs_handle_t *zhp, const char *propname, const char *propval) 1744{ 1745 int ret = -1; 1746 char errbuf[1024]; 1747 libzfs_handle_t *hdl = zhp->zfs_hdl; 1748 nvlist_t *nvl = NULL; 1749 1750 (void) snprintf(errbuf, sizeof (errbuf), 1751 dgettext(TEXT_DOMAIN, "cannot set property for '%s'"), 1752 zhp->zfs_name); 1753 1754 if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0 || 1755 nvlist_add_string(nvl, propname, propval) != 0) { 1756 (void) no_memory(hdl); 1757 goto error; 1758 } 1759 1760 ret = zfs_prop_set_list(zhp, nvl); 1761 1762error: 1763 nvlist_free(nvl); 1764 return (ret); 1765} 1766 1767 1768 1769/* 1770 * Given an nvlist of property names and values, set the properties for the 1771 * given dataset. 1772 */ 1773int 1774zfs_prop_set_list(zfs_handle_t *zhp, nvlist_t *props) 1775{ 1776 zfs_cmd_t zc = { 0 }; 1777 int ret = -1; 1778 prop_changelist_t **cls = NULL; 1779 int cl_idx; 1780 char errbuf[1024]; 1781 libzfs_handle_t *hdl = zhp->zfs_hdl; 1782 nvlist_t *nvl; 1783 int nvl_len; 1784 int added_resv = 0; 1785 1786 (void) snprintf(errbuf, sizeof (errbuf), 1787 dgettext(TEXT_DOMAIN, "cannot set property for '%s'"), 1788 zhp->zfs_name); 1789 1790 if ((nvl = zfs_valid_proplist(hdl, zhp->zfs_type, props, 1791 zfs_prop_get_int(zhp, ZFS_PROP_ZONED), zhp, zhp->zpool_hdl, 1792 errbuf)) == NULL) 1793 goto error; 1794 1795 /* 1796 * We have to check for any extra properties which need to be added 1797 * before computing the length of the nvlist. 1798 */ 1799 for (nvpair_t *elem = nvlist_next_nvpair(nvl, NULL); 1800 elem != NULL; 1801 elem = nvlist_next_nvpair(nvl, elem)) { 1802 if (zfs_name_to_prop(nvpair_name(elem)) == ZFS_PROP_VOLSIZE && 1803 (added_resv = zfs_add_synthetic_resv(zhp, nvl)) == -1) { 1804 goto error; 1805 } 1806 } 1807 1808 if (added_resv != 1 && 1809 (added_resv = zfs_fix_auto_resv(zhp, nvl)) == -1) { 1810 goto error; 1811 } 1812 1813 /* 1814 * Check how many properties we're setting and allocate an array to 1815 * store changelist pointers for postfix(). 1816 */ 1817 nvl_len = 0; 1818 for (nvpair_t *elem = nvlist_next_nvpair(nvl, NULL); 1819 elem != NULL; 1820 elem = nvlist_next_nvpair(nvl, elem)) 1821 nvl_len++; 1822 if ((cls = calloc(nvl_len, sizeof (prop_changelist_t *))) == NULL) 1823 goto error; 1824 1825 cl_idx = 0; 1826 for (nvpair_t *elem = nvlist_next_nvpair(nvl, NULL); 1827 elem != NULL; 1828 elem = nvlist_next_nvpair(nvl, elem)) { 1829 1830 zfs_prop_t prop = zfs_name_to_prop(nvpair_name(elem)); 1831 1832 assert(cl_idx < nvl_len); 1833 /* 1834 * We don't want to unmount & remount the dataset when changing 1835 * its canmount property to 'on' or 'noauto'. We only use 1836 * the changelist logic to unmount when setting canmount=off. 1837 */ 1838 if (prop != ZFS_PROP_CANMOUNT || 1839 (fnvpair_value_uint64(elem) == ZFS_CANMOUNT_OFF && 1840 zfs_is_mounted(zhp, NULL))) { 1841 cls[cl_idx] = changelist_gather(zhp, prop, 0, 0); 1842 if (cls[cl_idx] == NULL) 1843 goto error; 1844 } 1845 1846 if (prop == ZFS_PROP_MOUNTPOINT && 1847 changelist_haszonedchild(cls[cl_idx])) { 1848 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1849 "child dataset with inherited mountpoint is used " 1850 "in a non-global zone")); 1851 ret = zfs_error(hdl, EZFS_ZONED, errbuf); 1852 goto error; 1853 } 1854 1855 /* We don't support those properties on FreeBSD. */ 1856 switch (prop) { 1857 case ZFS_PROP_DEVICES: 1858 case ZFS_PROP_ISCSIOPTIONS: 1859 case ZFS_PROP_XATTR: 1860 case ZFS_PROP_VSCAN: 1861 case ZFS_PROP_NBMAND: 1862 case ZFS_PROP_MLSLABEL: 1863 (void) snprintf(errbuf, sizeof (errbuf), 1864 "property '%s' not supported on FreeBSD", 1865 nvpair_name(elem)); 1866 ret = zfs_error(hdl, EZFS_PERM, errbuf); 1867 goto error; 1868 } 1869 1870 if (cls[cl_idx] != NULL && 1871 (ret = changelist_prefix(cls[cl_idx])) != 0) 1872 goto error; 1873 1874 cl_idx++; 1875 } 1876 assert(cl_idx == nvl_len); 1877 1878 /* 1879 * Execute the corresponding ioctl() to set this list of properties. 1880 */ 1881 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 1882 1883 if ((ret = zcmd_write_src_nvlist(hdl, &zc, nvl)) != 0 || 1884 (ret = zcmd_alloc_dst_nvlist(hdl, &zc, 0)) != 0) 1885 goto error; 1886 1887 ret = zfs_ioctl(hdl, ZFS_IOC_SET_PROP, &zc); 1888 1889 if (ret != 0) { 1890 if (zc.zc_nvlist_dst_filled == B_FALSE) { 1891 (void) zfs_standard_error(hdl, errno, errbuf); 1892 goto error; 1893 } 1894 1895 /* Get the list of unset properties back and report them. */ 1896 nvlist_t *errorprops = NULL; 1897 if (zcmd_read_dst_nvlist(hdl, &zc, &errorprops) != 0) 1898 goto error; 1899 for (nvpair_t *elem = nvlist_next_nvpair(errorprops, NULL); 1900 elem != NULL; 1901 elem = nvlist_next_nvpair(errorprops, elem)) { 1902 zfs_prop_t prop = zfs_name_to_prop(nvpair_name(elem)); 1903 zfs_setprop_error(hdl, prop, errno, errbuf); 1904 } 1905 nvlist_free(errorprops); 1906 1907 if (added_resv && errno == ENOSPC) { 1908 /* clean up the volsize property we tried to set */ 1909 uint64_t old_volsize = zfs_prop_get_int(zhp, 1910 ZFS_PROP_VOLSIZE); 1911 nvlist_free(nvl); 1912 nvl = NULL; 1913 zcmd_free_nvlists(&zc); 1914 1915 if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0) 1916 goto error; 1917 if (nvlist_add_uint64(nvl, 1918 zfs_prop_to_name(ZFS_PROP_VOLSIZE), 1919 old_volsize) != 0) 1920 goto error; 1921 if (zcmd_write_src_nvlist(hdl, &zc, nvl) != 0) 1922 goto error; 1923 (void) zfs_ioctl(hdl, ZFS_IOC_SET_PROP, &zc); 1924 } 1925 } else { 1926 for (cl_idx = 0; cl_idx < nvl_len; cl_idx++) { 1927 if (cls[cl_idx] != NULL) { 1928 int clp_err = changelist_postfix(cls[cl_idx]); 1929 if (clp_err != 0) 1930 ret = clp_err; 1931 } 1932 } 1933 1934 /* 1935 * Refresh the statistics so the new property value 1936 * is reflected. 1937 */ 1938 if (ret == 0) 1939 (void) get_stats(zhp); 1940 } 1941 1942error: 1943 nvlist_free(nvl); 1944 zcmd_free_nvlists(&zc); 1945 if (cls != NULL) { 1946 for (cl_idx = 0; cl_idx < nvl_len; cl_idx++) { 1947 if (cls[cl_idx] != NULL) 1948 changelist_free(cls[cl_idx]); 1949 } 1950 free(cls); 1951 } 1952 return (ret); 1953} 1954 1955/* 1956 * Given a property, inherit the value from the parent dataset, or if received 1957 * is TRUE, revert to the received value, if any. 1958 */ 1959int 1960zfs_prop_inherit(zfs_handle_t *zhp, const char *propname, boolean_t received) 1961{ 1962 zfs_cmd_t zc = { 0 }; 1963 int ret; 1964 prop_changelist_t *cl; 1965 libzfs_handle_t *hdl = zhp->zfs_hdl; 1966 char errbuf[1024]; 1967 zfs_prop_t prop; 1968 1969 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 1970 "cannot inherit %s for '%s'"), propname, zhp->zfs_name); 1971 1972 zc.zc_cookie = received; 1973 if ((prop = zfs_name_to_prop(propname)) == ZPROP_INVAL) { 1974 /* 1975 * For user properties, the amount of work we have to do is very 1976 * small, so just do it here. 1977 */ 1978 if (!zfs_prop_user(propname)) { 1979 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1980 "invalid property")); 1981 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 1982 } 1983 1984 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 1985 (void) strlcpy(zc.zc_value, propname, sizeof (zc.zc_value)); 1986 1987 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_INHERIT_PROP, &zc) != 0) 1988 return (zfs_standard_error(hdl, errno, errbuf)); 1989 1990 return (0); 1991 } 1992 1993 /* 1994 * Verify that this property is inheritable. 1995 */ 1996 if (zfs_prop_readonly(prop)) 1997 return (zfs_error(hdl, EZFS_PROPREADONLY, errbuf)); 1998 1999 if (!zfs_prop_inheritable(prop) && !received) 2000 return (zfs_error(hdl, EZFS_PROPNONINHERIT, errbuf)); 2001 2002 /* 2003 * Check to see if the value applies to this type 2004 */ 2005 if (!zfs_prop_valid_for_type(prop, zhp->zfs_type)) 2006 return (zfs_error(hdl, EZFS_PROPTYPE, errbuf)); 2007 2008 /* 2009 * Normalize the name, to get rid of shorthand abbreviations. 2010 */ 2011 propname = zfs_prop_to_name(prop); 2012 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 2013 (void) strlcpy(zc.zc_value, propname, sizeof (zc.zc_value)); 2014 2015 if (prop == ZFS_PROP_MOUNTPOINT && getzoneid() == GLOBAL_ZONEID && 2016 zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) { 2017 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 2018 "dataset is used in a non-global zone")); 2019 return (zfs_error(hdl, EZFS_ZONED, errbuf)); 2020 } 2021 2022 /* 2023 * Determine datasets which will be affected by this change, if any. 2024 */ 2025 if ((cl = changelist_gather(zhp, prop, 0, 0)) == NULL) 2026 return (-1); 2027 2028 if (prop == ZFS_PROP_MOUNTPOINT && changelist_haszonedchild(cl)) { 2029 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 2030 "child dataset with inherited mountpoint is used " 2031 "in a non-global zone")); 2032 ret = zfs_error(hdl, EZFS_ZONED, errbuf); 2033 goto error; 2034 } 2035 2036 if ((ret = changelist_prefix(cl)) != 0) 2037 goto error; 2038 2039 if ((ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_INHERIT_PROP, &zc)) != 0) { 2040 return (zfs_standard_error(hdl, errno, errbuf)); 2041 } else { 2042 2043 if ((ret = changelist_postfix(cl)) != 0) 2044 goto error; 2045 2046 /* 2047 * Refresh the statistics so the new property is reflected. 2048 */ 2049 (void) get_stats(zhp); 2050 } 2051 2052error: 2053 changelist_free(cl); 2054 return (ret); 2055} 2056 2057/* 2058 * True DSL properties are stored in an nvlist. The following two functions 2059 * extract them appropriately. 2060 */ 2061static uint64_t 2062getprop_uint64(zfs_handle_t *zhp, zfs_prop_t prop, char **source) 2063{ 2064 nvlist_t *nv; 2065 uint64_t value; 2066 2067 *source = NULL; 2068 if (nvlist_lookup_nvlist(zhp->zfs_props, 2069 zfs_prop_to_name(prop), &nv) == 0) { 2070 verify(nvlist_lookup_uint64(nv, ZPROP_VALUE, &value) == 0); 2071 (void) nvlist_lookup_string(nv, ZPROP_SOURCE, source); 2072 } else { 2073 verify(!zhp->zfs_props_table || 2074 zhp->zfs_props_table[prop] == B_TRUE); 2075 value = zfs_prop_default_numeric(prop); 2076 *source = ""; 2077 } 2078 2079 return (value); 2080} 2081 2082static const char * 2083getprop_string(zfs_handle_t *zhp, zfs_prop_t prop, char **source) 2084{ 2085 nvlist_t *nv; 2086 const char *value; 2087 2088 *source = NULL; 2089 if (nvlist_lookup_nvlist(zhp->zfs_props, 2090 zfs_prop_to_name(prop), &nv) == 0) { 2091 value = fnvlist_lookup_string(nv, ZPROP_VALUE); 2092 (void) nvlist_lookup_string(nv, ZPROP_SOURCE, source); 2093 } else { 2094 verify(!zhp->zfs_props_table || 2095 zhp->zfs_props_table[prop] == B_TRUE); 2096 value = zfs_prop_default_string(prop); 2097 *source = ""; 2098 } 2099 2100 return (value); 2101} 2102 2103static boolean_t 2104zfs_is_recvd_props_mode(zfs_handle_t *zhp) 2105{ 2106 return (zhp->zfs_props == zhp->zfs_recvd_props); 2107} 2108 2109static void 2110zfs_set_recvd_props_mode(zfs_handle_t *zhp, uint64_t *cookie) 2111{ 2112 *cookie = (uint64_t)(uintptr_t)zhp->zfs_props; 2113 zhp->zfs_props = zhp->zfs_recvd_props; 2114} 2115 2116static void 2117zfs_unset_recvd_props_mode(zfs_handle_t *zhp, uint64_t *cookie) 2118{ 2119 zhp->zfs_props = (nvlist_t *)(uintptr_t)*cookie; 2120 *cookie = 0; 2121} 2122 2123/* 2124 * Internal function for getting a numeric property. Both zfs_prop_get() and 2125 * zfs_prop_get_int() are built using this interface. 2126 * 2127 * Certain properties can be overridden using 'mount -o'. In this case, scan 2128 * the contents of the /etc/mnttab entry, searching for the appropriate options. 2129 * If they differ from the on-disk values, report the current values and mark 2130 * the source "temporary". 2131 */ 2132static int 2133get_numeric_property(zfs_handle_t *zhp, zfs_prop_t prop, zprop_source_t *src, 2134 char **source, uint64_t *val) 2135{ 2136 zfs_cmd_t zc = { 0 }; 2137 nvlist_t *zplprops = NULL; 2138 struct mnttab mnt; 2139 char *mntopt_on = NULL; 2140 char *mntopt_off = NULL; 2141 boolean_t received = zfs_is_recvd_props_mode(zhp); 2142 2143 *source = NULL; 2144 2145 switch (prop) { 2146 case ZFS_PROP_ATIME: 2147 mntopt_on = MNTOPT_ATIME; 2148 mntopt_off = MNTOPT_NOATIME; 2149 break; 2150 2151 case ZFS_PROP_DEVICES: 2152 mntopt_on = MNTOPT_DEVICES; 2153 mntopt_off = MNTOPT_NODEVICES; 2154 break; 2155 2156 case ZFS_PROP_EXEC: 2157 mntopt_on = MNTOPT_EXEC; 2158 mntopt_off = MNTOPT_NOEXEC; 2159 break; 2160 2161 case ZFS_PROP_READONLY: 2162 mntopt_on = MNTOPT_RO; 2163 mntopt_off = MNTOPT_RW; 2164 break; 2165 2166 case ZFS_PROP_SETUID: 2167 mntopt_on = MNTOPT_SETUID; 2168 mntopt_off = MNTOPT_NOSETUID; 2169 break; 2170 2171 case ZFS_PROP_XATTR: 2172 mntopt_on = MNTOPT_XATTR; 2173 mntopt_off = MNTOPT_NOXATTR; 2174 break; 2175 2176 case ZFS_PROP_NBMAND: 2177 mntopt_on = MNTOPT_NBMAND; 2178 mntopt_off = MNTOPT_NONBMAND; 2179 break; 2180 2181 default: 2182 break; 2183 } 2184 2185 /* 2186 * Because looking up the mount options is potentially expensive 2187 * (iterating over all of /etc/mnttab), we defer its calculation until 2188 * we're looking up a property which requires its presence. 2189 */ 2190 if (!zhp->zfs_mntcheck && 2191 (mntopt_on != NULL || prop == ZFS_PROP_MOUNTED)) { 2192 libzfs_handle_t *hdl = zhp->zfs_hdl; 2193 struct mnttab entry; 2194 2195 if (libzfs_mnttab_find(hdl, zhp->zfs_name, &entry) == 0) { 2196 zhp->zfs_mntopts = zfs_strdup(hdl, 2197 entry.mnt_mntopts); 2198 if (zhp->zfs_mntopts == NULL) 2199 return (-1); 2200 } 2201 2202 zhp->zfs_mntcheck = B_TRUE; 2203 } 2204 2205 if (zhp->zfs_mntopts == NULL) 2206 mnt.mnt_mntopts = ""; 2207 else 2208 mnt.mnt_mntopts = zhp->zfs_mntopts; 2209 2210 switch (prop) { 2211 case ZFS_PROP_ATIME: 2212 case ZFS_PROP_DEVICES: 2213 case ZFS_PROP_EXEC: 2214 case ZFS_PROP_READONLY: 2215 case ZFS_PROP_SETUID: 2216 case ZFS_PROP_XATTR: 2217 case ZFS_PROP_NBMAND: 2218 *val = getprop_uint64(zhp, prop, source); 2219 2220 if (received) 2221 break; 2222 2223 if (hasmntopt(&mnt, mntopt_on) && !*val) { 2224 *val = B_TRUE; 2225 if (src) 2226 *src = ZPROP_SRC_TEMPORARY; 2227 } else if (hasmntopt(&mnt, mntopt_off) && *val) { 2228 *val = B_FALSE; 2229 if (src) 2230 *src = ZPROP_SRC_TEMPORARY; 2231 } 2232 break; 2233 2234 case ZFS_PROP_CANMOUNT: 2235 case ZFS_PROP_VOLSIZE: 2236 case ZFS_PROP_QUOTA: 2237 case ZFS_PROP_REFQUOTA: 2238 case ZFS_PROP_RESERVATION: 2239 case ZFS_PROP_REFRESERVATION: 2240 case ZFS_PROP_FILESYSTEM_LIMIT: 2241 case ZFS_PROP_SNAPSHOT_LIMIT: 2242 case ZFS_PROP_FILESYSTEM_COUNT: 2243 case ZFS_PROP_SNAPSHOT_COUNT: 2244 *val = getprop_uint64(zhp, prop, source); 2245 2246 if (*source == NULL) { 2247 /* not default, must be local */ 2248 *source = zhp->zfs_name; 2249 } 2250 break; 2251 2252 case ZFS_PROP_MOUNTED: 2253 *val = (zhp->zfs_mntopts != NULL); 2254 break; 2255 2256 case ZFS_PROP_NUMCLONES: 2257 *val = zhp->zfs_dmustats.dds_num_clones; 2258 break; 2259 2260 case ZFS_PROP_VERSION: 2261 case ZFS_PROP_NORMALIZE: 2262 case ZFS_PROP_UTF8ONLY: 2263 case ZFS_PROP_CASE: 2264 if (!zfs_prop_valid_for_type(prop, zhp->zfs_head_type) || 2265 zcmd_alloc_dst_nvlist(zhp->zfs_hdl, &zc, 0) != 0) 2266 return (-1); 2267 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 2268 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_OBJSET_ZPLPROPS, &zc)) { 2269 zcmd_free_nvlists(&zc); 2270 return (-1); 2271 } 2272 if (zcmd_read_dst_nvlist(zhp->zfs_hdl, &zc, &zplprops) != 0 || 2273 nvlist_lookup_uint64(zplprops, zfs_prop_to_name(prop), 2274 val) != 0) { 2275 zcmd_free_nvlists(&zc); 2276 return (-1); 2277 } 2278 nvlist_free(zplprops); 2279 zcmd_free_nvlists(&zc); 2280 break; 2281 2282 case ZFS_PROP_INCONSISTENT: 2283 *val = zhp->zfs_dmustats.dds_inconsistent; 2284 break; 2285 2286 default: 2287 switch (zfs_prop_get_type(prop)) { 2288 case PROP_TYPE_NUMBER: 2289 case PROP_TYPE_INDEX: 2290 *val = getprop_uint64(zhp, prop, source); 2291 /* 2292 * If we tried to use a default value for a 2293 * readonly property, it means that it was not 2294 * present. Note this only applies to "truly" 2295 * readonly properties, not set-once properties 2296 * like volblocksize. 2297 */ 2298 if (zfs_prop_readonly(prop) && 2299 !zfs_prop_setonce(prop) && 2300 *source != NULL && (*source)[0] == '\0') { 2301 *source = NULL; 2302 return (-1); 2303 } 2304 break; 2305 2306 case PROP_TYPE_STRING: 2307 default: 2308 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN, 2309 "cannot get non-numeric property")); 2310 return (zfs_error(zhp->zfs_hdl, EZFS_BADPROP, 2311 dgettext(TEXT_DOMAIN, "internal error"))); 2312 } 2313 } 2314 2315 return (0); 2316} 2317 2318/* 2319 * Calculate the source type, given the raw source string. 2320 */ 2321static void 2322get_source(zfs_handle_t *zhp, zprop_source_t *srctype, char *source, 2323 char *statbuf, size_t statlen) 2324{ 2325 if (statbuf == NULL || *srctype == ZPROP_SRC_TEMPORARY) 2326 return; 2327 2328 if (source == NULL) { 2329 *srctype = ZPROP_SRC_NONE; 2330 } else if (source[0] == '\0') { 2331 *srctype = ZPROP_SRC_DEFAULT; 2332 } else if (strstr(source, ZPROP_SOURCE_VAL_RECVD) != NULL) { 2333 *srctype = ZPROP_SRC_RECEIVED; 2334 } else { 2335 if (strcmp(source, zhp->zfs_name) == 0) { 2336 *srctype = ZPROP_SRC_LOCAL; 2337 } else { 2338 (void) strlcpy(statbuf, source, statlen); 2339 *srctype = ZPROP_SRC_INHERITED; 2340 } 2341 } 2342 2343} 2344 2345int 2346zfs_prop_get_recvd(zfs_handle_t *zhp, const char *propname, char *propbuf, 2347 size_t proplen, boolean_t literal) 2348{ 2349 zfs_prop_t prop; 2350 int err = 0; 2351 2352 if (zhp->zfs_recvd_props == NULL) 2353 if (get_recvd_props_ioctl(zhp) != 0) 2354 return (-1); 2355 2356 prop = zfs_name_to_prop(propname); 2357 2358 if (prop != ZPROP_INVAL) { 2359 uint64_t cookie; 2360 if (!nvlist_exists(zhp->zfs_recvd_props, propname)) 2361 return (-1); 2362 zfs_set_recvd_props_mode(zhp, &cookie); 2363 err = zfs_prop_get(zhp, prop, propbuf, proplen, 2364 NULL, NULL, 0, literal); 2365 zfs_unset_recvd_props_mode(zhp, &cookie); 2366 } else { 2367 nvlist_t *propval; 2368 char *recvdval; 2369 if (nvlist_lookup_nvlist(zhp->zfs_recvd_props, 2370 propname, &propval) != 0) 2371 return (-1); 2372 verify(nvlist_lookup_string(propval, ZPROP_VALUE, 2373 &recvdval) == 0); 2374 (void) strlcpy(propbuf, recvdval, proplen); 2375 } 2376 2377 return (err == 0 ? 0 : -1); 2378} 2379 2380static int 2381get_clones_string(zfs_handle_t *zhp, char *propbuf, size_t proplen) 2382{ 2383 nvlist_t *value; 2384 nvpair_t *pair; 2385 2386 value = zfs_get_clones_nvl(zhp); 2387 if (value == NULL) 2388 return (-1); 2389 2390 propbuf[0] = '\0'; 2391 for (pair = nvlist_next_nvpair(value, NULL); pair != NULL; 2392 pair = nvlist_next_nvpair(value, pair)) { 2393 if (propbuf[0] != '\0') 2394 (void) strlcat(propbuf, ",", proplen); 2395 (void) strlcat(propbuf, nvpair_name(pair), proplen); 2396 } 2397 2398 return (0); 2399} 2400 2401struct get_clones_arg { 2402 uint64_t numclones; 2403 nvlist_t *value; 2404 const char *origin; 2405 char buf[ZFS_MAX_DATASET_NAME_LEN]; 2406}; 2407 2408int 2409get_clones_cb(zfs_handle_t *zhp, void *arg) 2410{ 2411 struct get_clones_arg *gca = arg; 2412 2413 if (gca->numclones == 0) { 2414 zfs_close(zhp); 2415 return (0); 2416 } 2417 2418 if (zfs_prop_get(zhp, ZFS_PROP_ORIGIN, gca->buf, sizeof (gca->buf), 2419 NULL, NULL, 0, B_TRUE) != 0) 2420 goto out; 2421 if (strcmp(gca->buf, gca->origin) == 0) { 2422 fnvlist_add_boolean(gca->value, zfs_get_name(zhp)); 2423 gca->numclones--; 2424 } 2425 2426out: 2427 (void) zfs_iter_children(zhp, get_clones_cb, gca); 2428 zfs_close(zhp); 2429 return (0); 2430} 2431 2432nvlist_t * 2433zfs_get_clones_nvl(zfs_handle_t *zhp) 2434{ 2435 nvlist_t *nv, *value; 2436 2437 if (nvlist_lookup_nvlist(zhp->zfs_props, 2438 zfs_prop_to_name(ZFS_PROP_CLONES), &nv) != 0) { 2439 struct get_clones_arg gca; 2440 2441 /* 2442 * if this is a snapshot, then the kernel wasn't able 2443 * to get the clones. Do it by slowly iterating. 2444 */ 2445 if (zhp->zfs_type != ZFS_TYPE_SNAPSHOT) 2446 return (NULL); 2447 if (nvlist_alloc(&nv, NV_UNIQUE_NAME, 0) != 0) 2448 return (NULL); 2449 if (nvlist_alloc(&value, NV_UNIQUE_NAME, 0) != 0) { 2450 nvlist_free(nv); 2451 return (NULL); 2452 } 2453 2454 gca.numclones = zfs_prop_get_int(zhp, ZFS_PROP_NUMCLONES); 2455 gca.value = value; 2456 gca.origin = zhp->zfs_name; 2457 2458 if (gca.numclones != 0) { 2459 zfs_handle_t *root; 2460 char pool[ZFS_MAX_DATASET_NAME_LEN]; 2461 char *cp = pool; 2462 2463 /* get the pool name */ 2464 (void) strlcpy(pool, zhp->zfs_name, sizeof (pool)); 2465 (void) strsep(&cp, "/@"); 2466 root = zfs_open(zhp->zfs_hdl, pool, 2467 ZFS_TYPE_FILESYSTEM); 2468 2469 (void) get_clones_cb(root, &gca); 2470 } 2471 2472 if (gca.numclones != 0 || 2473 nvlist_add_nvlist(nv, ZPROP_VALUE, value) != 0 || 2474 nvlist_add_nvlist(zhp->zfs_props, 2475 zfs_prop_to_name(ZFS_PROP_CLONES), nv) != 0) { 2476 nvlist_free(nv); 2477 nvlist_free(value); 2478 return (NULL); 2479 } 2480 nvlist_free(nv); 2481 nvlist_free(value); 2482 verify(0 == nvlist_lookup_nvlist(zhp->zfs_props, 2483 zfs_prop_to_name(ZFS_PROP_CLONES), &nv)); 2484 } 2485 2486 verify(nvlist_lookup_nvlist(nv, ZPROP_VALUE, &value) == 0); 2487 2488 return (value); 2489} 2490 2491/* 2492 * Accepts a property and value and checks that the value 2493 * matches the one found by the channel program. If they are 2494 * not equal, print both of them. 2495 */ 2496void 2497zcp_check(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t intval, 2498 const char *strval) 2499{ 2500 if (!zhp->zfs_hdl->libzfs_prop_debug) 2501 return; 2502 int error; 2503 char *poolname = zhp->zpool_hdl->zpool_name; 2504 const char *program = 2505 "args = ...\n" 2506 "ds = args['dataset']\n" 2507 "prop = args['property']\n" 2508 "value, setpoint = zfs.get_prop(ds, prop)\n" 2509 "return {value=value, setpoint=setpoint}\n"; 2510 nvlist_t *outnvl; 2511 nvlist_t *retnvl; 2512 nvlist_t *argnvl = fnvlist_alloc(); 2513 2514 fnvlist_add_string(argnvl, "dataset", zhp->zfs_name); 2515 fnvlist_add_string(argnvl, "property", zfs_prop_to_name(prop)); 2516 2517 error = lzc_channel_program_nosync(poolname, program, 2518 10 * 1000 * 1000, 10 * 1024 * 1024, argnvl, &outnvl); 2519 2520 if (error == 0) { 2521 retnvl = fnvlist_lookup_nvlist(outnvl, "return"); 2522 if (zfs_prop_get_type(prop) == PROP_TYPE_NUMBER) { 2523 int64_t ans; 2524 error = nvlist_lookup_int64(retnvl, "value", &ans); 2525 if (error != 0) { 2526 (void) fprintf(stderr, "zcp check error: %u\n", 2527 error); 2528 return; 2529 } 2530 if (ans != intval) { 2531 (void) fprintf(stderr, 2532 "%s: zfs found %lld, but zcp found %lld\n", 2533 zfs_prop_to_name(prop), 2534 (longlong_t)intval, (longlong_t)ans); 2535 } 2536 } else { 2537 char *str_ans; 2538 error = nvlist_lookup_string(retnvl, "value", &str_ans); 2539 if (error != 0) { 2540 (void) fprintf(stderr, "zcp check error: %u\n", 2541 error); 2542 return; 2543 } 2544 if (strcmp(strval, str_ans) != 0) { 2545 (void) fprintf(stderr, 2546 "%s: zfs found %s, but zcp found %s\n", 2547 zfs_prop_to_name(prop), 2548 strval, str_ans); 2549 } 2550 } 2551 } else { 2552 (void) fprintf(stderr, 2553 "zcp check failed, channel program error: %u\n", error); 2554 } 2555 nvlist_free(argnvl); 2556 nvlist_free(outnvl); 2557} 2558 2559/* 2560 * Retrieve a property from the given object. If 'literal' is specified, then 2561 * numbers are left as exact values. Otherwise, numbers are converted to a 2562 * human-readable form. 2563 * 2564 * Returns 0 on success, or -1 on error. 2565 */ 2566int 2567zfs_prop_get(zfs_handle_t *zhp, zfs_prop_t prop, char *propbuf, size_t proplen, 2568 zprop_source_t *src, char *statbuf, size_t statlen, boolean_t literal) 2569{ 2570 char *source = NULL; 2571 uint64_t val; 2572 const char *str; 2573 const char *strval; 2574 boolean_t received = zfs_is_recvd_props_mode(zhp); 2575 2576 /* 2577 * Check to see if this property applies to our object 2578 */ 2579 if (!zfs_prop_valid_for_type(prop, zhp->zfs_type)) 2580 return (-1); 2581 2582 if (received && zfs_prop_readonly(prop)) 2583 return (-1); 2584 2585 if (src) 2586 *src = ZPROP_SRC_NONE; 2587 2588 switch (prop) { 2589 case ZFS_PROP_CREATION: 2590 /* 2591 * 'creation' is a time_t stored in the statistics. We convert 2592 * this into a string unless 'literal' is specified. 2593 */ 2594 { 2595 val = getprop_uint64(zhp, prop, &source); 2596 time_t time = (time_t)val; 2597 struct tm t; 2598 2599 if (literal || 2600 localtime_r(&time, &t) == NULL || 2601 strftime(propbuf, proplen, "%a %b %e %k:%M %Y", 2602 &t) == 0) 2603 (void) snprintf(propbuf, proplen, "%llu", val); 2604 } 2605 zcp_check(zhp, prop, val, NULL); 2606 break; 2607 2608 case ZFS_PROP_MOUNTPOINT: 2609 /* 2610 * Getting the precise mountpoint can be tricky. 2611 * 2612 * - for 'none' or 'legacy', return those values. 2613 * - for inherited mountpoints, we want to take everything 2614 * after our ancestor and append it to the inherited value. 2615 * 2616 * If the pool has an alternate root, we want to prepend that 2617 * root to any values we return. 2618 */ 2619 2620 str = getprop_string(zhp, prop, &source); 2621 2622 if (str[0] == '/') { 2623 char buf[MAXPATHLEN]; 2624 char *root = buf; 2625 const char *relpath; 2626 2627 /* 2628 * If we inherit the mountpoint, even from a dataset 2629 * with a received value, the source will be the path of 2630 * the dataset we inherit from. If source is 2631 * ZPROP_SOURCE_VAL_RECVD, the received value is not 2632 * inherited. 2633 */ 2634 if (strcmp(source, ZPROP_SOURCE_VAL_RECVD) == 0) { 2635 relpath = ""; 2636 } else { 2637 relpath = zhp->zfs_name + strlen(source); 2638 if (relpath[0] == '/') 2639 relpath++; 2640 } 2641 2642 if ((zpool_get_prop(zhp->zpool_hdl, 2643 ZPOOL_PROP_ALTROOT, buf, MAXPATHLEN, NULL, 2644 B_FALSE)) || (strcmp(root, "-") == 0)) 2645 root[0] = '\0'; 2646 /* 2647 * Special case an alternate root of '/'. This will 2648 * avoid having multiple leading slashes in the 2649 * mountpoint path. 2650 */ 2651 if (strcmp(root, "/") == 0) 2652 root++; 2653 2654 /* 2655 * If the mountpoint is '/' then skip over this 2656 * if we are obtaining either an alternate root or 2657 * an inherited mountpoint. 2658 */ 2659 if (str[1] == '\0' && (root[0] != '\0' || 2660 relpath[0] != '\0')) 2661 str++; 2662 2663 if (relpath[0] == '\0') 2664 (void) snprintf(propbuf, proplen, "%s%s", 2665 root, str); 2666 else 2667 (void) snprintf(propbuf, proplen, "%s%s%s%s", 2668 root, str, relpath[0] == '@' ? "" : "/", 2669 relpath); 2670 } else { 2671 /* 'legacy' or 'none' */ 2672 (void) strlcpy(propbuf, str, proplen); 2673 } 2674 zcp_check(zhp, prop, NULL, propbuf); 2675 break; 2676 2677 case ZFS_PROP_ORIGIN: 2678 str = getprop_string(zhp, prop, &source); 2679 if (str == NULL) 2680 return (-1); 2681 (void) strlcpy(propbuf, str, proplen); 2682 zcp_check(zhp, prop, NULL, str); 2683 break; 2684 2685 case ZFS_PROP_CLONES: 2686 if (get_clones_string(zhp, propbuf, proplen) != 0) 2687 return (-1); 2688 break; 2689 2690 case ZFS_PROP_QUOTA: 2691 case ZFS_PROP_REFQUOTA: 2692 case ZFS_PROP_RESERVATION: 2693 case ZFS_PROP_REFRESERVATION: 2694 2695 if (get_numeric_property(zhp, prop, src, &source, &val) != 0) 2696 return (-1); 2697 /* 2698 * If quota or reservation is 0, we translate this into 'none' 2699 * (unless literal is set), and indicate that it's the default 2700 * value. Otherwise, we print the number nicely and indicate 2701 * that its set locally. 2702 */ 2703 if (val == 0) { 2704 if (literal) 2705 (void) strlcpy(propbuf, "0", proplen); 2706 else 2707 (void) strlcpy(propbuf, "none", proplen); 2708 } else { 2709 if (literal) 2710 (void) snprintf(propbuf, proplen, "%llu", 2711 (u_longlong_t)val); 2712 else 2713 zfs_nicenum(val, propbuf, proplen); 2714 } 2715 zcp_check(zhp, prop, val, NULL); 2716 break; 2717 2718 case ZFS_PROP_FILESYSTEM_LIMIT: 2719 case ZFS_PROP_SNAPSHOT_LIMIT: 2720 case ZFS_PROP_FILESYSTEM_COUNT: 2721 case ZFS_PROP_SNAPSHOT_COUNT: 2722 2723 if (get_numeric_property(zhp, prop, src, &source, &val) != 0) 2724 return (-1); 2725 2726 /* 2727 * If limit is UINT64_MAX, we translate this into 'none' (unless 2728 * literal is set), and indicate that it's the default value. 2729 * Otherwise, we print the number nicely and indicate that it's 2730 * set locally. 2731 */ 2732 if (literal) { 2733 (void) snprintf(propbuf, proplen, "%llu", 2734 (u_longlong_t)val); 2735 } else if (val == UINT64_MAX) { 2736 (void) strlcpy(propbuf, "none", proplen); 2737 } else { 2738 zfs_nicenum(val, propbuf, proplen); 2739 } 2740 2741 zcp_check(zhp, prop, val, NULL); 2742 break; 2743 2744 case ZFS_PROP_REFRATIO: 2745 case ZFS_PROP_COMPRESSRATIO: 2746 if (get_numeric_property(zhp, prop, src, &source, &val) != 0) 2747 return (-1); 2748 (void) snprintf(propbuf, proplen, "%llu.%02llux", 2749 (u_longlong_t)(val / 100), 2750 (u_longlong_t)(val % 100)); 2751 zcp_check(zhp, prop, val, NULL); 2752 break; 2753 2754 case ZFS_PROP_TYPE: 2755 switch (zhp->zfs_type) { 2756 case ZFS_TYPE_FILESYSTEM: 2757 str = "filesystem"; 2758 break; 2759 case ZFS_TYPE_VOLUME: 2760 str = "volume"; 2761 break; 2762 case ZFS_TYPE_SNAPSHOT: 2763 str = "snapshot"; 2764 break; 2765 case ZFS_TYPE_BOOKMARK: 2766 str = "bookmark"; 2767 break; 2768 default: 2769 abort(); 2770 } 2771 (void) snprintf(propbuf, proplen, "%s", str); 2772 zcp_check(zhp, prop, NULL, propbuf); 2773 break; 2774 2775 case ZFS_PROP_MOUNTED: 2776 /* 2777 * The 'mounted' property is a pseudo-property that described 2778 * whether the filesystem is currently mounted. Even though 2779 * it's a boolean value, the typical values of "on" and "off" 2780 * don't make sense, so we translate to "yes" and "no". 2781 */ 2782 if (get_numeric_property(zhp, ZFS_PROP_MOUNTED, 2783 src, &source, &val) != 0) 2784 return (-1); 2785 if (val) 2786 (void) strlcpy(propbuf, "yes", proplen); 2787 else 2788 (void) strlcpy(propbuf, "no", proplen); 2789 break; 2790 2791 case ZFS_PROP_NAME: 2792 /* 2793 * The 'name' property is a pseudo-property derived from the 2794 * dataset name. It is presented as a real property to simplify 2795 * consumers. 2796 */ 2797 (void) strlcpy(propbuf, zhp->zfs_name, proplen); 2798 zcp_check(zhp, prop, NULL, propbuf); 2799 break; 2800 2801 case ZFS_PROP_MLSLABEL: 2802 { 2803#ifdef illumos 2804 m_label_t *new_sl = NULL; 2805 char *ascii = NULL; /* human readable label */ 2806 2807 (void) strlcpy(propbuf, 2808 getprop_string(zhp, prop, &source), proplen); 2809 2810 if (literal || (strcasecmp(propbuf, 2811 ZFS_MLSLABEL_DEFAULT) == 0)) 2812 break; 2813 2814 /* 2815 * Try to translate the internal hex string to 2816 * human-readable output. If there are any 2817 * problems just use the hex string. 2818 */ 2819 2820 if (str_to_label(propbuf, &new_sl, MAC_LABEL, 2821 L_NO_CORRECTION, NULL) == -1) { 2822 m_label_free(new_sl); 2823 break; 2824 } 2825 2826 if (label_to_str(new_sl, &ascii, M_LABEL, 2827 DEF_NAMES) != 0) { 2828 if (ascii) 2829 free(ascii); 2830 m_label_free(new_sl); 2831 break; 2832 } 2833 m_label_free(new_sl); 2834 2835 (void) strlcpy(propbuf, ascii, proplen); 2836 free(ascii); 2837#else /* !illumos */ 2838 propbuf[0] = '\0'; 2839#endif /* illumos */ 2840 } 2841 break; 2842 2843 case ZFS_PROP_GUID: 2844 case ZFS_PROP_CREATETXG: 2845 /* 2846 * GUIDs are stored as numbers, but they are identifiers. 2847 * We don't want them to be pretty printed, because pretty 2848 * printing mangles the ID into a truncated and useless value. 2849 */ 2850 if (get_numeric_property(zhp, prop, src, &source, &val) != 0) 2851 return (-1); 2852 (void) snprintf(propbuf, proplen, "%llu", (u_longlong_t)val); 2853 zcp_check(zhp, prop, val, NULL); 2854 break; 2855 2856 default: 2857 switch (zfs_prop_get_type(prop)) { 2858 case PROP_TYPE_NUMBER: 2859 if (get_numeric_property(zhp, prop, src, 2860 &source, &val) != 0) { 2861 return (-1); 2862 } 2863 2864 if (literal) { 2865 (void) snprintf(propbuf, proplen, "%llu", 2866 (u_longlong_t)val); 2867 } else { 2868 zfs_nicenum(val, propbuf, proplen); 2869 } 2870 zcp_check(zhp, prop, val, NULL); 2871 break; 2872 2873 case PROP_TYPE_STRING: 2874 str = getprop_string(zhp, prop, &source); 2875 if (str == NULL) 2876 return (-1); 2877 2878 (void) strlcpy(propbuf, str, proplen); 2879 zcp_check(zhp, prop, NULL, str); 2880 break; 2881 2882 case PROP_TYPE_INDEX: 2883 if (get_numeric_property(zhp, prop, src, 2884 &source, &val) != 0) 2885 return (-1); 2886 if (zfs_prop_index_to_string(prop, val, &strval) != 0) 2887 return (-1); 2888 2889 (void) strlcpy(propbuf, strval, proplen); 2890 zcp_check(zhp, prop, NULL, strval); 2891 break; 2892 2893 default: 2894 abort(); 2895 } 2896 } 2897 2898 get_source(zhp, src, source, statbuf, statlen); 2899 2900 return (0); 2901} 2902 2903/* 2904 * Utility function to get the given numeric property. Does no validation that 2905 * the given property is the appropriate type; should only be used with 2906 * hard-coded property types. 2907 */ 2908uint64_t 2909zfs_prop_get_int(zfs_handle_t *zhp, zfs_prop_t prop) 2910{ 2911 char *source; 2912 uint64_t val; 2913 2914 (void) get_numeric_property(zhp, prop, NULL, &source, &val); 2915 2916 return (val); 2917} 2918 2919int 2920zfs_prop_set_int(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t val) 2921{ 2922 char buf[64]; 2923 2924 (void) snprintf(buf, sizeof (buf), "%llu", (longlong_t)val); 2925 return (zfs_prop_set(zhp, zfs_prop_to_name(prop), buf)); 2926} 2927 2928/* 2929 * Similar to zfs_prop_get(), but returns the value as an integer. 2930 */ 2931int 2932zfs_prop_get_numeric(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t *value, 2933 zprop_source_t *src, char *statbuf, size_t statlen) 2934{ 2935 char *source; 2936 2937 /* 2938 * Check to see if this property applies to our object 2939 */ 2940 if (!zfs_prop_valid_for_type(prop, zhp->zfs_type)) { 2941 return (zfs_error_fmt(zhp->zfs_hdl, EZFS_PROPTYPE, 2942 dgettext(TEXT_DOMAIN, "cannot get property '%s'"), 2943 zfs_prop_to_name(prop))); 2944 } 2945 2946 if (src) 2947 *src = ZPROP_SRC_NONE; 2948 2949 if (get_numeric_property(zhp, prop, src, &source, value) != 0) 2950 return (-1); 2951 2952 get_source(zhp, src, source, statbuf, statlen); 2953 2954 return (0); 2955} 2956 2957static int 2958idmap_id_to_numeric_domain_rid(uid_t id, boolean_t isuser, 2959 char **domainp, idmap_rid_t *ridp) 2960{ 2961#ifdef illumos 2962 idmap_get_handle_t *get_hdl = NULL; 2963 idmap_stat status; 2964 int err = EINVAL; 2965 2966 if (idmap_get_create(&get_hdl) != IDMAP_SUCCESS) 2967 goto out; 2968 2969 if (isuser) { 2970 err = idmap_get_sidbyuid(get_hdl, id, 2971 IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status); 2972 } else { 2973 err = idmap_get_sidbygid(get_hdl, id, 2974 IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status); 2975 } 2976 if (err == IDMAP_SUCCESS && 2977 idmap_get_mappings(get_hdl) == IDMAP_SUCCESS && 2978 status == IDMAP_SUCCESS) 2979 err = 0; 2980 else 2981 err = EINVAL; 2982out: 2983 if (get_hdl) 2984 idmap_get_destroy(get_hdl); 2985 return (err); 2986#else /* !illumos */ 2987 assert(!"invalid code path"); 2988 return (EINVAL); // silence compiler warning 2989#endif /* illumos */ 2990} 2991 2992/* 2993 * convert the propname into parameters needed by kernel 2994 * Eg: userquota@ahrens -> ZFS_PROP_USERQUOTA, "", 126829 2995 * Eg: userused@matt@domain -> ZFS_PROP_USERUSED, "S-1-123-456", 789 2996 */ 2997static int 2998userquota_propname_decode(const char *propname, boolean_t zoned, 2999 zfs_userquota_prop_t *typep, char *domain, int domainlen, uint64_t *ridp) 3000{ 3001 zfs_userquota_prop_t type; 3002 char *cp, *end; 3003 char *numericsid = NULL; 3004 boolean_t isuser; 3005 3006 domain[0] = '\0'; 3007 *ridp = 0; 3008 /* Figure out the property type ({user|group}{quota|space}) */ 3009 for (type = 0; type < ZFS_NUM_USERQUOTA_PROPS; type++) { 3010 if (strncmp(propname, zfs_userquota_prop_prefixes[type], 3011 strlen(zfs_userquota_prop_prefixes[type])) == 0) 3012 break; 3013 } 3014 if (type == ZFS_NUM_USERQUOTA_PROPS) 3015 return (EINVAL); 3016 *typep = type; 3017 3018 isuser = (type == ZFS_PROP_USERQUOTA || 3019 type == ZFS_PROP_USERUSED); 3020 3021 cp = strchr(propname, '@') + 1; 3022 3023 if (strchr(cp, '@')) { 3024#ifdef illumos 3025 /* 3026 * It's a SID name (eg "user@domain") that needs to be 3027 * turned into S-1-domainID-RID. 3028 */ 3029 int flag = 0; 3030 idmap_stat stat, map_stat; 3031 uid_t pid; 3032 idmap_rid_t rid; 3033 idmap_get_handle_t *gh = NULL; 3034 3035 stat = idmap_get_create(&gh); 3036 if (stat != IDMAP_SUCCESS) { 3037 idmap_get_destroy(gh); 3038 return (ENOMEM); 3039 } 3040 if (zoned && getzoneid() == GLOBAL_ZONEID) 3041 return (ENOENT); 3042 if (isuser) { 3043 stat = idmap_getuidbywinname(cp, NULL, flag, &pid); 3044 if (stat < 0) 3045 return (ENOENT); 3046 stat = idmap_get_sidbyuid(gh, pid, flag, &numericsid, 3047 &rid, &map_stat); 3048 } else { 3049 stat = idmap_getgidbywinname(cp, NULL, flag, &pid); 3050 if (stat < 0) 3051 return (ENOENT); 3052 stat = idmap_get_sidbygid(gh, pid, flag, &numericsid, 3053 &rid, &map_stat); 3054 } 3055 if (stat < 0) { 3056 idmap_get_destroy(gh); 3057 return (ENOENT); 3058 } 3059 stat = idmap_get_mappings(gh); 3060 idmap_get_destroy(gh); 3061 3062 if (stat < 0) { 3063 return (ENOENT); 3064 } 3065 if (numericsid == NULL) 3066 return (ENOENT); 3067 cp = numericsid; 3068 *ridp = rid; 3069 /* will be further decoded below */ 3070#else /* !illumos */ 3071 return (ENOENT); 3072#endif /* illumos */ 3073 } 3074 3075 if (strncmp(cp, "S-1-", 4) == 0) { 3076 /* It's a numeric SID (eg "S-1-234-567-89") */ 3077 (void) strlcpy(domain, cp, domainlen); 3078 errno = 0; 3079 if (*ridp == 0) { 3080 cp = strrchr(domain, '-'); 3081 *cp = '\0'; 3082 cp++; 3083 *ridp = strtoull(cp, &end, 10); 3084 } else { 3085 end = ""; 3086 } 3087 if (numericsid) { 3088 free(numericsid); 3089 numericsid = NULL; 3090 } 3091 if (errno != 0 || *end != '\0') 3092 return (EINVAL); 3093 } else if (!isdigit(*cp)) { 3094 /* 3095 * It's a user/group name (eg "user") that needs to be 3096 * turned into a uid/gid 3097 */ 3098 if (zoned && getzoneid() == GLOBAL_ZONEID) 3099 return (ENOENT); 3100 if (isuser) { 3101 struct passwd *pw; 3102 pw = getpwnam(cp); 3103 if (pw == NULL) 3104 return (ENOENT); 3105 *ridp = pw->pw_uid; 3106 } else { 3107 struct group *gr; 3108 gr = getgrnam(cp); 3109 if (gr == NULL) 3110 return (ENOENT); 3111 *ridp = gr->gr_gid; 3112 } 3113 } else { 3114 /* It's a user/group ID (eg "12345"). */ 3115 uid_t id = strtoul(cp, &end, 10); 3116 idmap_rid_t rid; 3117 char *mapdomain; 3118 3119 if (*end != '\0') 3120 return (EINVAL); 3121 if (id > MAXUID) { 3122 /* It's an ephemeral ID. */ 3123 if (idmap_id_to_numeric_domain_rid(id, isuser, 3124 &mapdomain, &rid) != 0) 3125 return (ENOENT); 3126 (void) strlcpy(domain, mapdomain, domainlen); 3127 *ridp = rid; 3128 } else { 3129 *ridp = id; 3130 } 3131 } 3132 3133 ASSERT3P(numericsid, ==, NULL); 3134 return (0); 3135} 3136 3137static int 3138zfs_prop_get_userquota_common(zfs_handle_t *zhp, const char *propname, 3139 uint64_t *propvalue, zfs_userquota_prop_t *typep) 3140{ 3141 int err; 3142 zfs_cmd_t zc = { 0 }; 3143 3144 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 3145 3146 err = userquota_propname_decode(propname, 3147 zfs_prop_get_int(zhp, ZFS_PROP_ZONED), 3148 typep, zc.zc_value, sizeof (zc.zc_value), &zc.zc_guid); 3149 zc.zc_objset_type = *typep; 3150 if (err) 3151 return (err); 3152 3153 err = ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_USERSPACE_ONE, &zc); 3154 if (err) 3155 return (err); 3156 3157 *propvalue = zc.zc_cookie; 3158 return (0); 3159} 3160 3161int 3162zfs_prop_get_userquota_int(zfs_handle_t *zhp, const char *propname, 3163 uint64_t *propvalue) 3164{ 3165 zfs_userquota_prop_t type; 3166 3167 return (zfs_prop_get_userquota_common(zhp, propname, propvalue, 3168 &type)); 3169} 3170 3171int 3172zfs_prop_get_userquota(zfs_handle_t *zhp, const char *propname, 3173 char *propbuf, int proplen, boolean_t literal) 3174{ 3175 int err; 3176 uint64_t propvalue; 3177 zfs_userquota_prop_t type; 3178 3179 err = zfs_prop_get_userquota_common(zhp, propname, &propvalue, 3180 &type); 3181 3182 if (err) 3183 return (err); 3184 3185 if (literal) { 3186 (void) snprintf(propbuf, proplen, "%llu", propvalue); 3187 } else if (propvalue == 0 && 3188 (type == ZFS_PROP_USERQUOTA || type == ZFS_PROP_GROUPQUOTA)) { 3189 (void) strlcpy(propbuf, "none", proplen); 3190 } else { 3191 zfs_nicenum(propvalue, propbuf, proplen); 3192 } 3193 return (0); 3194} 3195 3196int 3197zfs_prop_get_written_int(zfs_handle_t *zhp, const char *propname, 3198 uint64_t *propvalue) 3199{ 3200 int err; 3201 zfs_cmd_t zc = { 0 }; 3202 const char *snapname; 3203 3204 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 3205 3206 snapname = strchr(propname, '@') + 1; 3207 if (strchr(snapname, '@')) { 3208 (void) strlcpy(zc.zc_value, snapname, sizeof (zc.zc_value)); 3209 } else { 3210 /* snapname is the short name, append it to zhp's fsname */ 3211 char *cp; 3212 3213 (void) strlcpy(zc.zc_value, zhp->zfs_name, 3214 sizeof (zc.zc_value)); 3215 cp = strchr(zc.zc_value, '@'); 3216 if (cp != NULL) 3217 *cp = '\0'; 3218 (void) strlcat(zc.zc_value, "@", sizeof (zc.zc_value)); 3219 (void) strlcat(zc.zc_value, snapname, sizeof (zc.zc_value)); 3220 } 3221 3222 err = ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_SPACE_WRITTEN, &zc); 3223 if (err) 3224 return (err); 3225 3226 *propvalue = zc.zc_cookie; 3227 return (0); 3228} 3229 3230int 3231zfs_prop_get_written(zfs_handle_t *zhp, const char *propname, 3232 char *propbuf, int proplen, boolean_t literal) 3233{ 3234 int err; 3235 uint64_t propvalue; 3236 3237 err = zfs_prop_get_written_int(zhp, propname, &propvalue); 3238 3239 if (err) 3240 return (err); 3241 3242 if (literal) { 3243 (void) snprintf(propbuf, proplen, "%llu", propvalue); 3244 } else { 3245 zfs_nicenum(propvalue, propbuf, proplen); 3246 } 3247 return (0); 3248} 3249 3250/* 3251 * Returns the name of the given zfs handle. 3252 */ 3253const char * 3254zfs_get_name(const zfs_handle_t *zhp) 3255{ 3256 return (zhp->zfs_name); 3257} 3258 3259/* 3260 * Returns the name of the parent pool for the given zfs handle. 3261 */ 3262const char * 3263zfs_get_pool_name(const zfs_handle_t *zhp) 3264{ 3265 return (zhp->zpool_hdl->zpool_name); 3266} 3267 3268/* 3269 * Returns the type of the given zfs handle. 3270 */ 3271zfs_type_t 3272zfs_get_type(const zfs_handle_t *zhp) 3273{ 3274 return (zhp->zfs_type); 3275} 3276 3277/* 3278 * Is one dataset name a child dataset of another? 3279 * 3280 * Needs to handle these cases: 3281 * Dataset 1 "a/foo" "a/foo" "a/foo" "a/foo" 3282 * Dataset 2 "a/fo" "a/foobar" "a/bar/baz" "a/foo/bar" 3283 * Descendant? No. No. No. Yes. 3284 */ 3285static boolean_t 3286is_descendant(const char *ds1, const char *ds2) 3287{ 3288 size_t d1len = strlen(ds1); 3289 3290 /* ds2 can't be a descendant if it's smaller */ 3291 if (strlen(ds2) < d1len) 3292 return (B_FALSE); 3293 3294 /* otherwise, compare strings and verify that there's a '/' char */ 3295 return (ds2[d1len] == '/' && (strncmp(ds1, ds2, d1len) == 0)); 3296} 3297 3298/* 3299 * Given a complete name, return just the portion that refers to the parent. 3300 * Will return -1 if there is no parent (path is just the name of the 3301 * pool). 3302 */ 3303static int 3304parent_name(const char *path, char *buf, size_t buflen) 3305{ 3306 char *slashp; 3307 3308 (void) strlcpy(buf, path, buflen); 3309 3310 if ((slashp = strrchr(buf, '/')) == NULL) 3311 return (-1); 3312 *slashp = '\0'; 3313 3314 return (0); 3315} 3316 3317/* 3318 * If accept_ancestor is false, then check to make sure that the given path has 3319 * a parent, and that it exists. If accept_ancestor is true, then find the 3320 * closest existing ancestor for the given path. In prefixlen return the 3321 * length of already existing prefix of the given path. We also fetch the 3322 * 'zoned' property, which is used to validate property settings when creating 3323 * new datasets. 3324 */ 3325static int 3326check_parents(libzfs_handle_t *hdl, const char *path, uint64_t *zoned, 3327 boolean_t accept_ancestor, int *prefixlen) 3328{ 3329 zfs_cmd_t zc = { 0 }; 3330 char parent[ZFS_MAX_DATASET_NAME_LEN]; 3331 char *slash; 3332 zfs_handle_t *zhp; 3333 char errbuf[1024]; 3334 uint64_t is_zoned; 3335 3336 (void) snprintf(errbuf, sizeof (errbuf), 3337 dgettext(TEXT_DOMAIN, "cannot create '%s'"), path); 3338 3339 /* get parent, and check to see if this is just a pool */ 3340 if (parent_name(path, parent, sizeof (parent)) != 0) { 3341 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3342 "missing dataset name")); 3343 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3344 } 3345 3346 /* check to see if the pool exists */ 3347 if ((slash = strchr(parent, '/')) == NULL) 3348 slash = parent + strlen(parent); 3349 (void) strncpy(zc.zc_name, parent, slash - parent); 3350 zc.zc_name[slash - parent] = '\0'; 3351 if (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_STATS, &zc) != 0 && 3352 errno == ENOENT) { 3353 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3354 "no such pool '%s'"), zc.zc_name); 3355 return (zfs_error(hdl, EZFS_NOENT, errbuf)); 3356 } 3357 3358 /* check to see if the parent dataset exists */ 3359 while ((zhp = make_dataset_handle(hdl, parent)) == NULL) { 3360 if (errno == ENOENT && accept_ancestor) { 3361 /* 3362 * Go deeper to find an ancestor, give up on top level. 3363 */ 3364 if (parent_name(parent, parent, sizeof (parent)) != 0) { 3365 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3366 "no such pool '%s'"), zc.zc_name); 3367 return (zfs_error(hdl, EZFS_NOENT, errbuf)); 3368 } 3369 } else if (errno == ENOENT) { 3370 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3371 "parent does not exist")); 3372 return (zfs_error(hdl, EZFS_NOENT, errbuf)); 3373 } else 3374 return (zfs_standard_error(hdl, errno, errbuf)); 3375 } 3376 3377 is_zoned = zfs_prop_get_int(zhp, ZFS_PROP_ZONED); 3378 if (zoned != NULL) 3379 *zoned = is_zoned; 3380 3381 /* we are in a non-global zone, but parent is in the global zone */ 3382 if (getzoneid() != GLOBAL_ZONEID && !is_zoned) { 3383 (void) zfs_standard_error(hdl, EPERM, errbuf); 3384 zfs_close(zhp); 3385 return (-1); 3386 } 3387 3388 /* make sure parent is a filesystem */ 3389 if (zfs_get_type(zhp) != ZFS_TYPE_FILESYSTEM) { 3390 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3391 "parent is not a filesystem")); 3392 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf); 3393 zfs_close(zhp); 3394 return (-1); 3395 } 3396 3397 zfs_close(zhp); 3398 if (prefixlen != NULL) 3399 *prefixlen = strlen(parent); 3400 return (0); 3401} 3402 3403/* 3404 * Finds whether the dataset of the given type(s) exists. 3405 */ 3406boolean_t 3407zfs_dataset_exists(libzfs_handle_t *hdl, const char *path, zfs_type_t types) 3408{ 3409 zfs_handle_t *zhp; 3410 3411 if (!zfs_validate_name(hdl, path, types, B_FALSE)) 3412 return (B_FALSE); 3413 3414 /* 3415 * Try to get stats for the dataset, which will tell us if it exists. 3416 */ 3417 if ((zhp = make_dataset_handle(hdl, path)) != NULL) { 3418 int ds_type = zhp->zfs_type; 3419 3420 zfs_close(zhp); 3421 if (types & ds_type) 3422 return (B_TRUE); 3423 } 3424 return (B_FALSE); 3425} 3426 3427/* 3428 * Given a path to 'target', create all the ancestors between 3429 * the prefixlen portion of the path, and the target itself. 3430 * Fail if the initial prefixlen-ancestor does not already exist. 3431 */ 3432int 3433create_parents(libzfs_handle_t *hdl, char *target, int prefixlen) 3434{ 3435 zfs_handle_t *h; 3436 char *cp; 3437 const char *opname; 3438 3439 /* make sure prefix exists */ 3440 cp = target + prefixlen; 3441 if (*cp != '/') { 3442 assert(strchr(cp, '/') == NULL); 3443 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM); 3444 } else { 3445 *cp = '\0'; 3446 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM); 3447 *cp = '/'; 3448 } 3449 if (h == NULL) 3450 return (-1); 3451 zfs_close(h); 3452 3453 /* 3454 * Attempt to create, mount, and share any ancestor filesystems, 3455 * up to the prefixlen-long one. 3456 */ 3457 for (cp = target + prefixlen + 1; 3458 (cp = strchr(cp, '/')) != NULL; *cp = '/', cp++) { 3459 3460 *cp = '\0'; 3461 3462 h = make_dataset_handle(hdl, target); 3463 if (h) { 3464 /* it already exists, nothing to do here */ 3465 zfs_close(h); 3466 continue; 3467 } 3468 3469 if (zfs_create(hdl, target, ZFS_TYPE_FILESYSTEM, 3470 NULL) != 0) { 3471 opname = dgettext(TEXT_DOMAIN, "create"); 3472 goto ancestorerr; 3473 } 3474 3475 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM); 3476 if (h == NULL) { 3477 opname = dgettext(TEXT_DOMAIN, "open"); 3478 goto ancestorerr; 3479 } 3480 3481 if (zfs_mount(h, NULL, 0) != 0) { 3482 opname = dgettext(TEXT_DOMAIN, "mount"); 3483 goto ancestorerr; 3484 } 3485 3486 if (zfs_share(h) != 0) { 3487 opname = dgettext(TEXT_DOMAIN, "share"); 3488 goto ancestorerr; 3489 } 3490 3491 zfs_close(h); 3492 } 3493 3494 return (0); 3495 3496ancestorerr: 3497 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3498 "failed to %s ancestor '%s'"), opname, target); 3499 return (-1); 3500} 3501 3502/* 3503 * Creates non-existing ancestors of the given path. 3504 */ 3505int 3506zfs_create_ancestors(libzfs_handle_t *hdl, const char *path) 3507{ 3508 int prefix; 3509 char *path_copy; 3510 char errbuf[1024]; 3511 int rc = 0; 3512 3513 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3514 "cannot create '%s'"), path); 3515 3516 /* 3517 * Check that we are not passing the nesting limit 3518 * before we start creating any ancestors. 3519 */ 3520 if (dataset_nestcheck(path) != 0) { 3521 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3522 "maximum name nesting depth exceeded")); 3523 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3524 } 3525 3526 if (check_parents(hdl, path, NULL, B_TRUE, &prefix) != 0) 3527 return (-1); 3528 3529 if ((path_copy = strdup(path)) != NULL) { 3530 rc = create_parents(hdl, path_copy, prefix); 3531 free(path_copy); 3532 } 3533 if (path_copy == NULL || rc != 0) 3534 return (-1); 3535 3536 return (0); 3537} 3538 3539/* 3540 * Create a new filesystem or volume. 3541 */ 3542int 3543zfs_create(libzfs_handle_t *hdl, const char *path, zfs_type_t type, 3544 nvlist_t *props) 3545{ 3546 int ret; 3547 uint64_t size = 0; 3548 uint64_t blocksize = zfs_prop_default_numeric(ZFS_PROP_VOLBLOCKSIZE); 3549 char errbuf[1024]; 3550 uint64_t zoned; 3551 enum lzc_dataset_type ost; 3552 zpool_handle_t *zpool_handle; 3553 3554 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3555 "cannot create '%s'"), path); 3556 3557 /* validate the path, taking care to note the extended error message */ 3558 if (!zfs_validate_name(hdl, path, type, B_TRUE)) 3559 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3560 3561 if (dataset_nestcheck(path) != 0) { 3562 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3563 "maximum name nesting depth exceeded")); 3564 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3565 } 3566 3567 /* validate parents exist */ 3568 if (check_parents(hdl, path, &zoned, B_FALSE, NULL) != 0) 3569 return (-1); 3570 3571 /* 3572 * The failure modes when creating a dataset of a different type over 3573 * one that already exists is a little strange. In particular, if you 3574 * try to create a dataset on top of an existing dataset, the ioctl() 3575 * will return ENOENT, not EEXIST. To prevent this from happening, we 3576 * first try to see if the dataset exists. 3577 */ 3578 if (zfs_dataset_exists(hdl, path, ZFS_TYPE_DATASET)) { 3579 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3580 "dataset already exists")); 3581 return (zfs_error(hdl, EZFS_EXISTS, errbuf)); 3582 } 3583 3584 if (type == ZFS_TYPE_VOLUME) 3585 ost = LZC_DATSET_TYPE_ZVOL; 3586 else 3587 ost = LZC_DATSET_TYPE_ZFS; 3588 3589 /* open zpool handle for prop validation */ 3590 char pool_path[ZFS_MAX_DATASET_NAME_LEN]; 3591 (void) strlcpy(pool_path, path, sizeof (pool_path)); 3592 3593 /* truncate pool_path at first slash */ 3594 char *p = strchr(pool_path, '/'); 3595 if (p != NULL) 3596 *p = '\0'; 3597 3598 if ((zpool_handle = zpool_open(hdl, pool_path)) == NULL) 3599 return (-1); 3600 3601 if (props && (props = zfs_valid_proplist(hdl, type, props, 3602 zoned, NULL, zpool_handle, errbuf)) == 0) { 3603 zpool_close(zpool_handle); 3604 return (-1); 3605 } 3606 zpool_close(zpool_handle); 3607 3608 if (type == ZFS_TYPE_VOLUME) { 3609 /* 3610 * If we are creating a volume, the size and block size must 3611 * satisfy a few restraints. First, the blocksize must be a 3612 * valid block size between SPA_{MIN,MAX}BLOCKSIZE. Second, the 3613 * volsize must be a multiple of the block size, and cannot be 3614 * zero. 3615 */ 3616 if (props == NULL || nvlist_lookup_uint64(props, 3617 zfs_prop_to_name(ZFS_PROP_VOLSIZE), &size) != 0) { 3618 nvlist_free(props); 3619 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3620 "missing volume size")); 3621 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 3622 } 3623 3624 if ((ret = nvlist_lookup_uint64(props, 3625 zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE), 3626 &blocksize)) != 0) { 3627 if (ret == ENOENT) { 3628 blocksize = zfs_prop_default_numeric( 3629 ZFS_PROP_VOLBLOCKSIZE); 3630 } else { 3631 nvlist_free(props); 3632 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3633 "missing volume block size")); 3634 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 3635 } 3636 } 3637 3638 if (size == 0) { 3639 nvlist_free(props); 3640 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3641 "volume size cannot be zero")); 3642 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 3643 } 3644 3645 if (size % blocksize != 0) { 3646 nvlist_free(props); 3647 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3648 "volume size must be a multiple of volume block " 3649 "size")); 3650 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 3651 } 3652 } 3653 3654 /* create the dataset */ 3655 ret = lzc_create(path, ost, props); 3656 nvlist_free(props); 3657 3658 /* check for failure */ 3659 if (ret != 0) { 3660 char parent[ZFS_MAX_DATASET_NAME_LEN]; 3661 (void) parent_name(path, parent, sizeof (parent)); 3662 3663 switch (errno) { 3664 case ENOENT: 3665 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3666 "no such parent '%s'"), parent); 3667 return (zfs_error(hdl, EZFS_NOENT, errbuf)); 3668 3669 case ENOTSUP: 3670 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3671 "pool must be upgraded to set this " 3672 "property or value")); 3673 return (zfs_error(hdl, EZFS_BADVERSION, errbuf)); 3674 case ERANGE: 3675 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3676 "invalid property value(s) specified")); 3677 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 3678#ifdef _ILP32 3679 case EOVERFLOW: 3680 /* 3681 * This platform can't address a volume this big. 3682 */ 3683 if (type == ZFS_TYPE_VOLUME) 3684 return (zfs_error(hdl, EZFS_VOLTOOBIG, 3685 errbuf)); 3686#endif 3687 /* FALLTHROUGH */ 3688 default: 3689 return (zfs_standard_error(hdl, errno, errbuf)); 3690 } 3691 } 3692 3693 return (0); 3694} 3695 3696/* 3697 * Destroys the given dataset. The caller must make sure that the filesystem 3698 * isn't mounted, and that there are no active dependents. If the file system 3699 * does not exist this function does nothing. 3700 */ 3701int 3702zfs_destroy(zfs_handle_t *zhp, boolean_t defer) 3703{ 3704 int error; 3705 3706 if (zhp->zfs_type != ZFS_TYPE_SNAPSHOT && defer) 3707 return (EINVAL); 3708 3709 if (zhp->zfs_type == ZFS_TYPE_BOOKMARK) { 3710 nvlist_t *nv = fnvlist_alloc(); 3711 fnvlist_add_boolean(nv, zhp->zfs_name); 3712 error = lzc_destroy_bookmarks(nv, NULL); 3713 fnvlist_free(nv); 3714 if (error != 0) { 3715 return (zfs_standard_error_fmt(zhp->zfs_hdl, error, 3716 dgettext(TEXT_DOMAIN, "cannot destroy '%s'"), 3717 zhp->zfs_name)); 3718 } 3719 return (0); 3720 } 3721 3722 if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) { 3723 nvlist_t *nv = fnvlist_alloc(); 3724 fnvlist_add_boolean(nv, zhp->zfs_name); 3725 error = lzc_destroy_snaps(nv, defer, NULL); 3726 fnvlist_free(nv); 3727 } else { 3728 error = lzc_destroy(zhp->zfs_name); 3729 } 3730 3731 if (error != 0 && error != ENOENT) { 3732 return (zfs_standard_error_fmt(zhp->zfs_hdl, errno, 3733 dgettext(TEXT_DOMAIN, "cannot destroy '%s'"), 3734 zhp->zfs_name)); 3735 } 3736 3737 remove_mountpoint(zhp); 3738 3739 return (0); 3740} 3741 3742struct destroydata { 3743 nvlist_t *nvl; 3744 const char *snapname; 3745}; 3746 3747static int 3748zfs_check_snap_cb(zfs_handle_t *zhp, void *arg) 3749{ 3750 struct destroydata *dd = arg; 3751 char name[ZFS_MAX_DATASET_NAME_LEN]; 3752 int rv = 0; 3753 3754 (void) snprintf(name, sizeof (name), 3755 "%s@%s", zhp->zfs_name, dd->snapname); 3756 3757 if (lzc_exists(name)) 3758 verify(nvlist_add_boolean(dd->nvl, name) == 0); 3759 3760 rv = zfs_iter_filesystems(zhp, zfs_check_snap_cb, dd); 3761 zfs_close(zhp); 3762 return (rv); 3763} 3764 3765/* 3766 * Destroys all snapshots with the given name in zhp & descendants. 3767 */ 3768int 3769zfs_destroy_snaps(zfs_handle_t *zhp, char *snapname, boolean_t defer) 3770{ 3771 int ret; 3772 struct destroydata dd = { 0 }; 3773 3774 dd.snapname = snapname; 3775 verify(nvlist_alloc(&dd.nvl, NV_UNIQUE_NAME, 0) == 0); 3776 (void) zfs_check_snap_cb(zfs_handle_dup(zhp), &dd); 3777 3778 if (nvlist_empty(dd.nvl)) { 3779 ret = zfs_standard_error_fmt(zhp->zfs_hdl, ENOENT, 3780 dgettext(TEXT_DOMAIN, "cannot destroy '%s@%s'"), 3781 zhp->zfs_name, snapname); 3782 } else { 3783 ret = zfs_destroy_snaps_nvl(zhp->zfs_hdl, dd.nvl, defer); 3784 } 3785 nvlist_free(dd.nvl); 3786 return (ret); 3787} 3788 3789/* 3790 * Destroys all the snapshots named in the nvlist. 3791 */ 3792int 3793zfs_destroy_snaps_nvl(libzfs_handle_t *hdl, nvlist_t *snaps, boolean_t defer) 3794{ 3795 int ret; 3796 nvlist_t *errlist = NULL; 3797 3798 ret = lzc_destroy_snaps(snaps, defer, &errlist); 3799 3800 if (ret == 0) { 3801 nvlist_free(errlist); 3802 return (0); 3803 } 3804 3805 if (nvlist_empty(errlist)) { 3806 char errbuf[1024]; 3807 (void) snprintf(errbuf, sizeof (errbuf), 3808 dgettext(TEXT_DOMAIN, "cannot destroy snapshots")); 3809 3810 ret = zfs_standard_error(hdl, ret, errbuf); 3811 } 3812 for (nvpair_t *pair = nvlist_next_nvpair(errlist, NULL); 3813 pair != NULL; pair = nvlist_next_nvpair(errlist, pair)) { 3814 char errbuf[1024]; 3815 (void) snprintf(errbuf, sizeof (errbuf), 3816 dgettext(TEXT_DOMAIN, "cannot destroy snapshot %s"), 3817 nvpair_name(pair)); 3818 3819 switch (fnvpair_value_int32(pair)) { 3820 case EEXIST: 3821 zfs_error_aux(hdl, 3822 dgettext(TEXT_DOMAIN, "snapshot is cloned")); 3823 ret = zfs_error(hdl, EZFS_EXISTS, errbuf); 3824 break; 3825 default: 3826 ret = zfs_standard_error(hdl, errno, errbuf); 3827 break; 3828 } 3829 } 3830 3831 nvlist_free(errlist); 3832 return (ret); 3833} 3834 3835/* 3836 * Clones the given dataset. The target must be of the same type as the source. 3837 */ 3838int 3839zfs_clone(zfs_handle_t *zhp, const char *target, nvlist_t *props) 3840{ 3841 char parent[ZFS_MAX_DATASET_NAME_LEN]; 3842 int ret; 3843 char errbuf[1024]; 3844 libzfs_handle_t *hdl = zhp->zfs_hdl; 3845 uint64_t zoned; 3846 3847 assert(zhp->zfs_type == ZFS_TYPE_SNAPSHOT); 3848 3849 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3850 "cannot create '%s'"), target); 3851 3852 /* validate the target/clone name */ 3853 if (!zfs_validate_name(hdl, target, ZFS_TYPE_FILESYSTEM, B_TRUE)) 3854 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3855 3856 /* validate parents exist */ 3857 if (check_parents(hdl, target, &zoned, B_FALSE, NULL) != 0) 3858 return (-1); 3859 3860 (void) parent_name(target, parent, sizeof (parent)); 3861 3862 /* do the clone */ 3863 3864 if (props) { 3865 zfs_type_t type; 3866 3867 if (ZFS_IS_VOLUME(zhp)) { 3868 type = ZFS_TYPE_VOLUME; 3869 } else { 3870 type = ZFS_TYPE_FILESYSTEM; 3871 } 3872 if ((props = zfs_valid_proplist(hdl, type, props, zoned, 3873 zhp, zhp->zpool_hdl, errbuf)) == NULL) 3874 return (-1); 3875 if (zfs_fix_auto_resv(zhp, props) == -1) { 3876 nvlist_free(props); 3877 return (-1); 3878 } 3879 } 3880 3881 ret = lzc_clone(target, zhp->zfs_name, props); 3882 nvlist_free(props); 3883 3884 if (ret != 0) { 3885 switch (errno) { 3886 3887 case ENOENT: 3888 /* 3889 * The parent doesn't exist. We should have caught this 3890 * above, but there may a race condition that has since 3891 * destroyed the parent. 3892 * 3893 * At this point, we don't know whether it's the source 3894 * that doesn't exist anymore, or whether the target 3895 * dataset doesn't exist. 3896 */ 3897 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN, 3898 "no such parent '%s'"), parent); 3899 return (zfs_error(zhp->zfs_hdl, EZFS_NOENT, errbuf)); 3900 3901 case EXDEV: 3902 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN, 3903 "source and target pools differ")); 3904 return (zfs_error(zhp->zfs_hdl, EZFS_CROSSTARGET, 3905 errbuf)); 3906 3907 default: 3908 return (zfs_standard_error(zhp->zfs_hdl, errno, 3909 errbuf)); 3910 } 3911 } 3912 3913 return (ret); 3914} 3915 3916/* 3917 * Promotes the given clone fs to be the clone parent. 3918 */ 3919int 3920zfs_promote(zfs_handle_t *zhp) 3921{ 3922 libzfs_handle_t *hdl = zhp->zfs_hdl; 3923 char snapname[ZFS_MAX_DATASET_NAME_LEN]; 3924 int ret; 3925 char errbuf[1024]; 3926 3927 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3928 "cannot promote '%s'"), zhp->zfs_name); 3929 3930 if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) { 3931 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3932 "snapshots can not be promoted")); 3933 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 3934 } 3935 3936 if (zhp->zfs_dmustats.dds_origin[0] == '\0') { 3937 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3938 "not a cloned filesystem")); 3939 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 3940 } 3941 3942 if (!zfs_validate_name(hdl, zhp->zfs_name, zhp->zfs_type, B_TRUE)) 3943 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3944 3945 ret = lzc_promote(zhp->zfs_name, snapname, sizeof (snapname)); 3946 3947 if (ret != 0) { 3948 switch (ret) { 3949 case EEXIST: 3950 /* There is a conflicting snapshot name. */ 3951 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3952 "conflicting snapshot '%s' from parent '%s'"), 3953 snapname, zhp->zfs_dmustats.dds_origin); 3954 return (zfs_error(hdl, EZFS_EXISTS, errbuf)); 3955 3956 default: 3957 return (zfs_standard_error(hdl, ret, errbuf)); 3958 } 3959 } 3960 return (ret); 3961} 3962 3963typedef struct snapdata { 3964 nvlist_t *sd_nvl; 3965 const char *sd_snapname; 3966} snapdata_t; 3967 3968static int 3969zfs_snapshot_cb(zfs_handle_t *zhp, void *arg) 3970{ 3971 snapdata_t *sd = arg; 3972 char name[ZFS_MAX_DATASET_NAME_LEN]; 3973 int rv = 0; 3974 3975 if (zfs_prop_get_int(zhp, ZFS_PROP_INCONSISTENT) == 0) { 3976 (void) snprintf(name, sizeof (name), 3977 "%s@%s", zfs_get_name(zhp), sd->sd_snapname); 3978 3979 fnvlist_add_boolean(sd->sd_nvl, name); 3980 3981 rv = zfs_iter_filesystems(zhp, zfs_snapshot_cb, sd); 3982 } 3983 zfs_close(zhp); 3984 3985 return (rv); 3986} 3987 3988int 3989zfs_remap_indirects(libzfs_handle_t *hdl, const char *fs) 3990{ 3991 int err; 3992 char errbuf[1024]; 3993 3994 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3995 "cannot remap dataset '%s'"), fs); 3996 3997 err = lzc_remap(fs); 3998 3999 if (err != 0) { 4000 switch (err) { 4001 case ENOTSUP: 4002 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4003 "pool must be upgraded")); 4004 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf); 4005 break; 4006 case EINVAL: 4007 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf); 4008 break; 4009 default: 4010 (void) zfs_standard_error(hdl, err, errbuf); 4011 break; 4012 } 4013 } 4014 4015 return (err); 4016} 4017 4018/* 4019 * Creates snapshots. The keys in the snaps nvlist are the snapshots to be 4020 * created. 4021 */ 4022int 4023zfs_snapshot_nvl(libzfs_handle_t *hdl, nvlist_t *snaps, nvlist_t *props) 4024{ 4025 int ret; 4026 char errbuf[1024]; 4027 nvpair_t *elem; 4028 nvlist_t *errors; 4029 4030 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 4031 "cannot create snapshots ")); 4032 4033 elem = NULL; 4034 while ((elem = nvlist_next_nvpair(snaps, elem)) != NULL) { 4035 const char *snapname = nvpair_name(elem); 4036 4037 /* validate the target name */ 4038 if (!zfs_validate_name(hdl, snapname, ZFS_TYPE_SNAPSHOT, 4039 B_TRUE)) { 4040 (void) snprintf(errbuf, sizeof (errbuf), 4041 dgettext(TEXT_DOMAIN, 4042 "cannot create snapshot '%s'"), snapname); 4043 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 4044 } 4045 } 4046 4047 /* 4048 * get pool handle for prop validation. assumes all snaps are in the 4049 * same pool, as does lzc_snapshot (below). 4050 */ 4051 char pool[ZFS_MAX_DATASET_NAME_LEN]; 4052 elem = nvlist_next_nvpair(snaps, NULL); 4053 (void) strlcpy(pool, nvpair_name(elem), sizeof (pool)); 4054 pool[strcspn(pool, "/@")] = '\0'; 4055 zpool_handle_t *zpool_hdl = zpool_open(hdl, pool); 4056 4057 if (props != NULL && 4058 (props = zfs_valid_proplist(hdl, ZFS_TYPE_SNAPSHOT, 4059 props, B_FALSE, NULL, zpool_hdl, errbuf)) == NULL) { 4060 zpool_close(zpool_hdl); 4061 return (-1); 4062 } 4063 zpool_close(zpool_hdl); 4064 4065 ret = lzc_snapshot(snaps, props, &errors); 4066 4067 if (ret != 0) { 4068 boolean_t printed = B_FALSE; 4069 for (elem = nvlist_next_nvpair(errors, NULL); 4070 elem != NULL; 4071 elem = nvlist_next_nvpair(errors, elem)) { 4072 (void) snprintf(errbuf, sizeof (errbuf), 4073 dgettext(TEXT_DOMAIN, 4074 "cannot create snapshot '%s'"), nvpair_name(elem)); 4075 (void) zfs_standard_error(hdl, 4076 fnvpair_value_int32(elem), errbuf); 4077 printed = B_TRUE; 4078 } 4079 if (!printed) { 4080 switch (ret) { 4081 case EXDEV: 4082 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4083 "multiple snapshots of same " 4084 "fs not allowed")); 4085 (void) zfs_error(hdl, EZFS_EXISTS, errbuf); 4086 4087 break; 4088 default: 4089 (void) zfs_standard_error(hdl, ret, errbuf); 4090 } 4091 } 4092 } 4093 4094 nvlist_free(props); 4095 nvlist_free(errors); 4096 return (ret); 4097} 4098 4099int 4100zfs_snapshot(libzfs_handle_t *hdl, const char *path, boolean_t recursive, 4101 nvlist_t *props) 4102{ 4103 int ret; 4104 snapdata_t sd = { 0 }; 4105 char fsname[ZFS_MAX_DATASET_NAME_LEN]; 4106 char *cp; 4107 zfs_handle_t *zhp; 4108 char errbuf[1024]; 4109 4110 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 4111 "cannot snapshot %s"), path); 4112 4113 if (!zfs_validate_name(hdl, path, ZFS_TYPE_SNAPSHOT, B_TRUE)) 4114 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 4115 4116 (void) strlcpy(fsname, path, sizeof (fsname)); 4117 cp = strchr(fsname, '@'); 4118 *cp = '\0'; 4119 sd.sd_snapname = cp + 1; 4120 4121 if ((zhp = zfs_open(hdl, fsname, ZFS_TYPE_FILESYSTEM | 4122 ZFS_TYPE_VOLUME)) == NULL) { 4123 return (-1); 4124 } 4125 4126 verify(nvlist_alloc(&sd.sd_nvl, NV_UNIQUE_NAME, 0) == 0); 4127 if (recursive) { 4128 (void) zfs_snapshot_cb(zfs_handle_dup(zhp), &sd); 4129 } else { 4130 fnvlist_add_boolean(sd.sd_nvl, path); 4131 } 4132 4133 ret = zfs_snapshot_nvl(hdl, sd.sd_nvl, props); 4134 nvlist_free(sd.sd_nvl); 4135 zfs_close(zhp); 4136 return (ret); 4137} 4138 4139/* 4140 * Destroy any more recent snapshots. We invoke this callback on any dependents 4141 * of the snapshot first. If the 'cb_dependent' member is non-zero, then this 4142 * is a dependent and we should just destroy it without checking the transaction 4143 * group. 4144 */ 4145typedef struct rollback_data { 4146 const char *cb_target; /* the snapshot */ 4147 uint64_t cb_create; /* creation time reference */ 4148 boolean_t cb_error; 4149 boolean_t cb_force; 4150} rollback_data_t; 4151 4152static int 4153rollback_destroy_dependent(zfs_handle_t *zhp, void *data) 4154{ 4155 rollback_data_t *cbp = data; 4156 prop_changelist_t *clp; 4157 4158 /* We must destroy this clone; first unmount it */ 4159 clp = changelist_gather(zhp, ZFS_PROP_NAME, 0, 4160 cbp->cb_force ? MS_FORCE: 0); 4161 if (clp == NULL || changelist_prefix(clp) != 0) { 4162 cbp->cb_error = B_TRUE; 4163 zfs_close(zhp); 4164 return (0); 4165 } 4166 if (zfs_destroy(zhp, B_FALSE) != 0) 4167 cbp->cb_error = B_TRUE; 4168 else 4169 changelist_remove(clp, zhp->zfs_name); 4170 (void) changelist_postfix(clp); 4171 changelist_free(clp); 4172 4173 zfs_close(zhp); 4174 return (0); 4175} 4176 4177static int 4178rollback_destroy(zfs_handle_t *zhp, void *data) 4179{ 4180 rollback_data_t *cbp = data; 4181 4182 if (zfs_prop_get_int(zhp, ZFS_PROP_CREATETXG) > cbp->cb_create) { 4183 cbp->cb_error |= zfs_iter_dependents(zhp, B_FALSE, 4184 rollback_destroy_dependent, cbp); 4185 4186 cbp->cb_error |= zfs_destroy(zhp, B_FALSE); 4187 } 4188 4189 zfs_close(zhp); 4190 return (0); 4191} 4192 4193/* 4194 * Given a dataset, rollback to a specific snapshot, discarding any 4195 * data changes since then and making it the active dataset. 4196 * 4197 * Any snapshots and bookmarks more recent than the target are 4198 * destroyed, along with their dependents (i.e. clones). 4199 */ 4200int 4201zfs_rollback(zfs_handle_t *zhp, zfs_handle_t *snap, boolean_t force) 4202{ 4203 rollback_data_t cb = { 0 }; 4204 int err; 4205 boolean_t restore_resv = 0; 4206 uint64_t min_txg = 0, old_volsize = 0, new_volsize; 4207 zfs_prop_t resv_prop; 4208 4209 assert(zhp->zfs_type == ZFS_TYPE_FILESYSTEM || 4210 zhp->zfs_type == ZFS_TYPE_VOLUME); 4211 4212 /* 4213 * Destroy all recent snapshots and their dependents. 4214 */ 4215 cb.cb_force = force; 4216 cb.cb_target = snap->zfs_name; 4217 cb.cb_create = zfs_prop_get_int(snap, ZFS_PROP_CREATETXG); 4218 4219 if (cb.cb_create > 0) 4220 min_txg = cb.cb_create; 4221 4222 (void) zfs_iter_snapshots(zhp, B_FALSE, rollback_destroy, &cb, 4223 min_txg, 0); 4224 4225 (void) zfs_iter_bookmarks(zhp, rollback_destroy, &cb); 4226 4227 if (cb.cb_error) 4228 return (-1); 4229 4230 /* 4231 * Now that we have verified that the snapshot is the latest, 4232 * rollback to the given snapshot. 4233 */ 4234 4235 if (zhp->zfs_type == ZFS_TYPE_VOLUME) { 4236 if (zfs_which_resv_prop(zhp, &resv_prop) < 0) 4237 return (-1); 4238 old_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE); 4239 restore_resv = 4240 (old_volsize == zfs_prop_get_int(zhp, resv_prop)); 4241 } 4242 4243 /* 4244 * Pass both the filesystem and the wanted snapshot names, 4245 * we would get an error back if the snapshot is destroyed or 4246 * a new snapshot is created before this request is processed. 4247 */ 4248 err = lzc_rollback_to(zhp->zfs_name, snap->zfs_name); 4249 if (err != 0) { 4250 char errbuf[1024]; 4251 4252 (void) snprintf(errbuf, sizeof (errbuf), 4253 dgettext(TEXT_DOMAIN, "cannot rollback '%s'"), 4254 zhp->zfs_name); 4255 switch (err) { 4256 case EEXIST: 4257 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN, 4258 "there is a snapshot or bookmark more recent " 4259 "than '%s'"), snap->zfs_name); 4260 (void) zfs_error(zhp->zfs_hdl, EZFS_EXISTS, errbuf); 4261 break; 4262 case ESRCH: 4263 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN, 4264 "'%s' is not found among snapshots of '%s'"), 4265 snap->zfs_name, zhp->zfs_name); 4266 (void) zfs_error(zhp->zfs_hdl, EZFS_NOENT, errbuf); 4267 break; 4268 case EINVAL: 4269 (void) zfs_error(zhp->zfs_hdl, EZFS_BADTYPE, errbuf); 4270 break; 4271 default: 4272 (void) zfs_standard_error(zhp->zfs_hdl, err, errbuf); 4273 } 4274 return (err); 4275 } 4276 4277 /* 4278 * For volumes, if the pre-rollback volsize matched the pre- 4279 * rollback reservation and the volsize has changed then set 4280 * the reservation property to the post-rollback volsize. 4281 * Make a new handle since the rollback closed the dataset. 4282 */ 4283 if ((zhp->zfs_type == ZFS_TYPE_VOLUME) && 4284 (zhp = make_dataset_handle(zhp->zfs_hdl, zhp->zfs_name))) { 4285 if (restore_resv) { 4286 new_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE); 4287 if (old_volsize != new_volsize) 4288 err = zfs_prop_set_int(zhp, resv_prop, 4289 new_volsize); 4290 } 4291 zfs_close(zhp); 4292 } 4293 return (err); 4294} 4295 4296/* 4297 * Renames the given dataset. 4298 */ 4299int 4300zfs_rename(zfs_handle_t *zhp, const char *source, const char *target, 4301 renameflags_t flags) 4302{ 4303 int ret = 0; 4304 zfs_cmd_t zc = { 0 }; 4305 char *delim; 4306 prop_changelist_t *cl = NULL; 4307 zfs_handle_t *zhrp = NULL; 4308 char *parentname = NULL; 4309 char parent[ZFS_MAX_DATASET_NAME_LEN]; 4310 char property[ZFS_MAXPROPLEN]; 4311 libzfs_handle_t *hdl = zhp->zfs_hdl; 4312 char errbuf[1024]; 4313 4314 /* if we have the same exact name, just return success */ 4315 if (strcmp(zhp->zfs_name, target) == 0) 4316 return (0); 4317 4318 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 4319 "cannot rename to '%s'"), target); 4320 4321 if (source != NULL) { 4322 /* 4323 * This is recursive snapshots rename, put snapshot name 4324 * (that might not exist) into zfs_name. 4325 */ 4326 assert(flags.recurse); 4327 4328 (void) strlcat(zhp->zfs_name, "@", sizeof(zhp->zfs_name)); 4329 (void) strlcat(zhp->zfs_name, source, sizeof(zhp->zfs_name)); 4330 zhp->zfs_type = ZFS_TYPE_SNAPSHOT; 4331 } 4332 4333 /* make sure source name is valid */ 4334 if (!zfs_validate_name(hdl, zhp->zfs_name, zhp->zfs_type, B_TRUE)) 4335 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 4336 4337 /* 4338 * Make sure the target name is valid 4339 */ 4340 if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT || 4341 zhp->zfs_type == ZFS_TYPE_BOOKMARK) { 4342 const char sep = zhp->zfs_type == ZFS_TYPE_SNAPSHOT ? '@' : '#'; 4343 4344 if ((strchr(target, sep) == NULL) || *target == sep) { 4345 /* 4346 * Snapshot target name is abbreviated, 4347 * reconstruct full dataset name 4348 */ 4349 (void) strlcpy(parent, zhp->zfs_name, sizeof (parent)); 4350 delim = strchr(parent, sep); 4351 if (strchr(target, sep) == NULL) 4352 *(++delim) = '\0'; 4353 else 4354 *delim = '\0'; 4355 (void) strlcat(parent, target, sizeof (parent)); 4356 target = parent; 4357 } else { 4358 /* 4359 * Make sure we're renaming within the same dataset. 4360 */ 4361 delim = strchr(target, sep); 4362 if (strncmp(zhp->zfs_name, target, delim - target) 4363 != 0 || zhp->zfs_name[delim - target] != sep) { 4364 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4365 "%s must be part of same dataset"), 4366 zhp->zfs_type == ZFS_TYPE_SNAPSHOT ? 4367 "snapshots" : "bookmarks"); 4368 return (zfs_error(hdl, EZFS_CROSSTARGET, 4369 errbuf)); 4370 } 4371 } 4372 4373 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE)) 4374 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 4375 } else { 4376 if (flags.recurse) { 4377 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4378 "recursive rename must be a snapshot")); 4379 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 4380 } 4381 4382 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE)) 4383 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 4384 4385 /* validate parents */ 4386 if (check_parents(hdl, target, NULL, B_FALSE, NULL) != 0) 4387 return (-1); 4388 4389 /* make sure we're in the same pool */ 4390 verify((delim = strchr(target, '/')) != NULL); 4391 if (strncmp(zhp->zfs_name, target, delim - target) != 0 || 4392 zhp->zfs_name[delim - target] != '/') { 4393 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4394 "datasets must be within same pool")); 4395 return (zfs_error(hdl, EZFS_CROSSTARGET, errbuf)); 4396 } 4397 4398 /* new name cannot be a child of the current dataset name */ 4399 if (is_descendant(zhp->zfs_name, target)) { 4400 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4401 "New dataset name cannot be a descendant of " 4402 "current dataset name")); 4403 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 4404 } 4405 } 4406 4407 (void) snprintf(errbuf, sizeof (errbuf), 4408 dgettext(TEXT_DOMAIN, "cannot rename '%s'"), zhp->zfs_name); 4409 4410 if (getzoneid() == GLOBAL_ZONEID && 4411 zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) { 4412 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4413 "dataset is used in a non-global zone")); 4414 return (zfs_error(hdl, EZFS_ZONED, errbuf)); 4415 } 4416 4417 /* 4418 * Avoid unmounting file systems with mountpoint property set to 4419 * 'legacy' or 'none' even if -u option is not given. 4420 */ 4421 if (zhp->zfs_type == ZFS_TYPE_FILESYSTEM && 4422 !flags.recurse && !flags.nounmount && 4423 zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, property, 4424 sizeof (property), NULL, NULL, 0, B_FALSE) == 0 && 4425 (strcmp(property, "legacy") == 0 || 4426 strcmp(property, "none") == 0)) { 4427 flags.nounmount = B_TRUE; 4428 } 4429 if (flags.recurse) { 4430 parentname = zfs_strdup(zhp->zfs_hdl, zhp->zfs_name); 4431 if (parentname == NULL) { 4432 ret = -1; 4433 goto error; 4434 } 4435 delim = strchr(parentname, '@'); 4436 *delim = '\0'; 4437 zhrp = zfs_open(zhp->zfs_hdl, parentname, ZFS_TYPE_DATASET); 4438 if (zhrp == NULL) { 4439 ret = -1; 4440 goto error; 4441 } 4442 } else if (zhp->zfs_type != ZFS_TYPE_SNAPSHOT && 4443 zhp->zfs_type != ZFS_TYPE_BOOKMARK) { 4444 if ((cl = changelist_gather(zhp, ZFS_PROP_NAME, 4445 flags.nounmount ? CL_GATHER_DONT_UNMOUNT : 0, 4446 flags.forceunmount ? MS_FORCE : 0)) == NULL) { 4447 return (-1); 4448 } 4449 4450 if (changelist_haszonedchild(cl)) { 4451 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4452 "child dataset with inherited mountpoint is used " 4453 "in a non-global zone")); 4454 (void) zfs_error(hdl, EZFS_ZONED, errbuf); 4455 ret = -1; 4456 goto error; 4457 } 4458 4459 if ((ret = changelist_prefix(cl)) != 0) 4460 goto error; 4461 } 4462 4463 if (ZFS_IS_VOLUME(zhp)) 4464 zc.zc_objset_type = DMU_OST_ZVOL; 4465 else 4466 zc.zc_objset_type = DMU_OST_ZFS; 4467 4468 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 4469 (void) strlcpy(zc.zc_value, target, sizeof (zc.zc_value)); 4470 4471 zc.zc_cookie = flags.recurse ? 1 : 0; 4472 if (flags.nounmount) 4473 zc.zc_cookie |= 2; 4474 4475 if ((ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_RENAME, &zc)) != 0) { 4476 /* 4477 * if it was recursive, the one that actually failed will 4478 * be in zc.zc_name 4479 */ 4480 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 4481 "cannot rename '%s'"), zc.zc_name); 4482 4483 if (flags.recurse && errno == EEXIST) { 4484 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4485 "a child dataset already has a snapshot " 4486 "with the new name")); 4487 (void) zfs_error(hdl, EZFS_EXISTS, errbuf); 4488 } else if (errno == EINVAL) { 4489 (void) zfs_error(hdl, EZFS_INVALIDNAME, errbuf); 4490 } else { 4491 (void) zfs_standard_error(zhp->zfs_hdl, errno, errbuf); 4492 } 4493 4494 /* 4495 * On failure, we still want to remount any filesystems that 4496 * were previously mounted, so we don't alter the system state. 4497 */ 4498 if (cl != NULL) 4499 (void) changelist_postfix(cl); 4500 } else { 4501 if (cl != NULL) { 4502 changelist_rename(cl, zfs_get_name(zhp), target); 4503 ret = changelist_postfix(cl); 4504 } 4505 } 4506 4507error: 4508 if (parentname != NULL) { 4509 free(parentname); 4510 } 4511 if (zhrp != NULL) { 4512 zfs_close(zhrp); 4513 } 4514 if (cl != NULL) { 4515 changelist_free(cl); 4516 } 4517 return (ret); 4518} 4519 4520nvlist_t * 4521zfs_get_user_props(zfs_handle_t *zhp) 4522{ 4523 return (zhp->zfs_user_props); 4524} 4525 4526nvlist_t * 4527zfs_get_recvd_props(zfs_handle_t *zhp) 4528{ 4529 if (zhp->zfs_recvd_props == NULL) 4530 if (get_recvd_props_ioctl(zhp) != 0) 4531 return (NULL); 4532 return (zhp->zfs_recvd_props); 4533} 4534 4535/* 4536 * This function is used by 'zfs list' to determine the exact set of columns to 4537 * display, and their maximum widths. This does two main things: 4538 * 4539 * - If this is a list of all properties, then expand the list to include 4540 * all native properties, and set a flag so that for each dataset we look 4541 * for new unique user properties and add them to the list. 4542 * 4543 * - For non fixed-width properties, keep track of the maximum width seen 4544 * so that we can size the column appropriately. If the user has 4545 * requested received property values, we also need to compute the width 4546 * of the RECEIVED column. 4547 */ 4548int 4549zfs_expand_proplist(zfs_handle_t *zhp, zprop_list_t **plp, boolean_t received, 4550 boolean_t literal) 4551{ 4552 libzfs_handle_t *hdl = zhp->zfs_hdl; 4553 zprop_list_t *entry; 4554 zprop_list_t **last, **start; 4555 nvlist_t *userprops, *propval; 4556 nvpair_t *elem; 4557 char *strval; 4558 char buf[ZFS_MAXPROPLEN]; 4559 4560 if (zprop_expand_list(hdl, plp, ZFS_TYPE_DATASET) != 0) 4561 return (-1); 4562 4563 userprops = zfs_get_user_props(zhp); 4564 4565 entry = *plp; 4566 if (entry->pl_all && nvlist_next_nvpair(userprops, NULL) != NULL) { 4567 /* 4568 * Go through and add any user properties as necessary. We 4569 * start by incrementing our list pointer to the first 4570 * non-native property. 4571 */ 4572 start = plp; 4573 while (*start != NULL) { 4574 if ((*start)->pl_prop == ZPROP_INVAL) 4575 break; 4576 start = &(*start)->pl_next; 4577 } 4578 4579 elem = NULL; 4580 while ((elem = nvlist_next_nvpair(userprops, elem)) != NULL) { 4581 /* 4582 * See if we've already found this property in our list. 4583 */ 4584 for (last = start; *last != NULL; 4585 last = &(*last)->pl_next) { 4586 if (strcmp((*last)->pl_user_prop, 4587 nvpair_name(elem)) == 0) 4588 break; 4589 } 4590 4591 if (*last == NULL) { 4592 if ((entry = zfs_alloc(hdl, 4593 sizeof (zprop_list_t))) == NULL || 4594 ((entry->pl_user_prop = zfs_strdup(hdl, 4595 nvpair_name(elem)))) == NULL) { 4596 free(entry); 4597 return (-1); 4598 } 4599 4600 entry->pl_prop = ZPROP_INVAL; 4601 entry->pl_width = strlen(nvpair_name(elem)); 4602 entry->pl_all = B_TRUE; 4603 *last = entry; 4604 } 4605 } 4606 } 4607 4608 /* 4609 * Now go through and check the width of any non-fixed columns 4610 */ 4611 for (entry = *plp; entry != NULL; entry = entry->pl_next) { 4612 if (entry->pl_fixed && !literal) 4613 continue; 4614 4615 if (entry->pl_prop != ZPROP_INVAL) { 4616 if (zfs_prop_get(zhp, entry->pl_prop, 4617 buf, sizeof (buf), NULL, NULL, 0, literal) == 0) { 4618 if (strlen(buf) > entry->pl_width) 4619 entry->pl_width = strlen(buf); 4620 } 4621 if (received && zfs_prop_get_recvd(zhp, 4622 zfs_prop_to_name(entry->pl_prop), 4623 buf, sizeof (buf), literal) == 0) 4624 if (strlen(buf) > entry->pl_recvd_width) 4625 entry->pl_recvd_width = strlen(buf); 4626 } else { 4627 if (nvlist_lookup_nvlist(userprops, entry->pl_user_prop, 4628 &propval) == 0) { 4629 verify(nvlist_lookup_string(propval, 4630 ZPROP_VALUE, &strval) == 0); 4631 if (strlen(strval) > entry->pl_width) 4632 entry->pl_width = strlen(strval); 4633 } 4634 if (received && zfs_prop_get_recvd(zhp, 4635 entry->pl_user_prop, 4636 buf, sizeof (buf), literal) == 0) 4637 if (strlen(buf) > entry->pl_recvd_width) 4638 entry->pl_recvd_width = strlen(buf); 4639 } 4640 } 4641 4642 return (0); 4643} 4644 4645int 4646zfs_deleg_share_nfs(libzfs_handle_t *hdl, char *dataset, char *path, 4647 char *resource, void *export, void *sharetab, 4648 int sharemax, zfs_share_op_t operation) 4649{ 4650 zfs_cmd_t zc = { 0 }; 4651 int error; 4652 4653 (void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name)); 4654 (void) strlcpy(zc.zc_value, path, sizeof (zc.zc_value)); 4655 if (resource) 4656 (void) strlcpy(zc.zc_string, resource, sizeof (zc.zc_string)); 4657 zc.zc_share.z_sharedata = (uint64_t)(uintptr_t)sharetab; 4658 zc.zc_share.z_exportdata = (uint64_t)(uintptr_t)export; 4659 zc.zc_share.z_sharetype = operation; 4660 zc.zc_share.z_sharemax = sharemax; 4661 error = ioctl(hdl->libzfs_fd, ZFS_IOC_SHARE, &zc); 4662 return (error); 4663} 4664 4665void 4666zfs_prune_proplist(zfs_handle_t *zhp, uint8_t *props) 4667{ 4668 nvpair_t *curr; 4669 4670 /* 4671 * Keep a reference to the props-table against which we prune the 4672 * properties. 4673 */ 4674 zhp->zfs_props_table = props; 4675 4676 curr = nvlist_next_nvpair(zhp->zfs_props, NULL); 4677 4678 while (curr) { 4679 zfs_prop_t zfs_prop = zfs_name_to_prop(nvpair_name(curr)); 4680 nvpair_t *next = nvlist_next_nvpair(zhp->zfs_props, curr); 4681 4682 /* 4683 * User properties will result in ZPROP_INVAL, and since we 4684 * only know how to prune standard ZFS properties, we always 4685 * leave these in the list. This can also happen if we 4686 * encounter an unknown DSL property (when running older 4687 * software, for example). 4688 */ 4689 if (zfs_prop != ZPROP_INVAL && props[zfs_prop] == B_FALSE) 4690 (void) nvlist_remove(zhp->zfs_props, 4691 nvpair_name(curr), nvpair_type(curr)); 4692 curr = next; 4693 } 4694} 4695 4696#ifdef illumos 4697static int 4698zfs_smb_acl_mgmt(libzfs_handle_t *hdl, char *dataset, char *path, 4699 zfs_smb_acl_op_t cmd, char *resource1, char *resource2) 4700{ 4701 zfs_cmd_t zc = { 0 }; 4702 nvlist_t *nvlist = NULL; 4703 int error; 4704 4705 (void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name)); 4706 (void) strlcpy(zc.zc_value, path, sizeof (zc.zc_value)); 4707 zc.zc_cookie = (uint64_t)cmd; 4708 4709 if (cmd == ZFS_SMB_ACL_RENAME) { 4710 if (nvlist_alloc(&nvlist, NV_UNIQUE_NAME, 0) != 0) { 4711 (void) no_memory(hdl); 4712 return (0); 4713 } 4714 } 4715 4716 switch (cmd) { 4717 case ZFS_SMB_ACL_ADD: 4718 case ZFS_SMB_ACL_REMOVE: 4719 (void) strlcpy(zc.zc_string, resource1, sizeof (zc.zc_string)); 4720 break; 4721 case ZFS_SMB_ACL_RENAME: 4722 if (nvlist_add_string(nvlist, ZFS_SMB_ACL_SRC, 4723 resource1) != 0) { 4724 (void) no_memory(hdl); 4725 return (-1); 4726 } 4727 if (nvlist_add_string(nvlist, ZFS_SMB_ACL_TARGET, 4728 resource2) != 0) { 4729 (void) no_memory(hdl); 4730 return (-1); 4731 } 4732 if (zcmd_write_src_nvlist(hdl, &zc, nvlist) != 0) { 4733 nvlist_free(nvlist); 4734 return (-1); 4735 } 4736 break; 4737 case ZFS_SMB_ACL_PURGE: 4738 break; 4739 default: 4740 return (-1); 4741 } 4742 error = ioctl(hdl->libzfs_fd, ZFS_IOC_SMB_ACL, &zc); 4743 nvlist_free(nvlist); 4744 return (error); 4745} 4746 4747int 4748zfs_smb_acl_add(libzfs_handle_t *hdl, char *dataset, 4749 char *path, char *resource) 4750{ 4751 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_ADD, 4752 resource, NULL)); 4753} 4754 4755int 4756zfs_smb_acl_remove(libzfs_handle_t *hdl, char *dataset, 4757 char *path, char *resource) 4758{ 4759 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_REMOVE, 4760 resource, NULL)); 4761} 4762 4763int 4764zfs_smb_acl_purge(libzfs_handle_t *hdl, char *dataset, char *path) 4765{ 4766 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_PURGE, 4767 NULL, NULL)); 4768} 4769 4770int 4771zfs_smb_acl_rename(libzfs_handle_t *hdl, char *dataset, char *path, 4772 char *oldname, char *newname) 4773{ 4774 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_RENAME, 4775 oldname, newname)); 4776} 4777#endif /* illumos */ 4778 4779int 4780zfs_userspace(zfs_handle_t *zhp, zfs_userquota_prop_t type, 4781 zfs_userspace_cb_t func, void *arg) 4782{ 4783 zfs_cmd_t zc = { 0 }; 4784 zfs_useracct_t buf[100]; 4785 libzfs_handle_t *hdl = zhp->zfs_hdl; 4786 int ret; 4787 4788 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 4789 4790 zc.zc_objset_type = type; 4791 zc.zc_nvlist_dst = (uintptr_t)buf; 4792 4793 for (;;) { 4794 zfs_useracct_t *zua = buf; 4795 4796 zc.zc_nvlist_dst_size = sizeof (buf); 4797 if (zfs_ioctl(hdl, ZFS_IOC_USERSPACE_MANY, &zc) != 0) { 4798 char errbuf[1024]; 4799 4800 (void) snprintf(errbuf, sizeof (errbuf), 4801 dgettext(TEXT_DOMAIN, 4802 "cannot get used/quota for %s"), zc.zc_name); 4803 return (zfs_standard_error_fmt(hdl, errno, errbuf)); 4804 } 4805 if (zc.zc_nvlist_dst_size == 0) 4806 break; 4807 4808 while (zc.zc_nvlist_dst_size > 0) { 4809 if ((ret = func(arg, zua->zu_domain, zua->zu_rid, 4810 zua->zu_space)) != 0) 4811 return (ret); 4812 zua++; 4813 zc.zc_nvlist_dst_size -= sizeof (zfs_useracct_t); 4814 } 4815 } 4816 4817 return (0); 4818} 4819 4820struct holdarg { 4821 nvlist_t *nvl; 4822 const char *snapname; 4823 const char *tag; 4824 boolean_t recursive; 4825 int error; 4826}; 4827 4828static int 4829zfs_hold_one(zfs_handle_t *zhp, void *arg) 4830{ 4831 struct holdarg *ha = arg; 4832 char name[ZFS_MAX_DATASET_NAME_LEN]; 4833 int rv = 0; 4834 4835 (void) snprintf(name, sizeof (name), 4836 "%s@%s", zhp->zfs_name, ha->snapname); 4837 4838 if (lzc_exists(name)) 4839 fnvlist_add_string(ha->nvl, name, ha->tag); 4840 4841 if (ha->recursive) 4842 rv = zfs_iter_filesystems(zhp, zfs_hold_one, ha); 4843 zfs_close(zhp); 4844 return (rv); 4845} 4846 4847int 4848zfs_hold(zfs_handle_t *zhp, const char *snapname, const char *tag, 4849 boolean_t recursive, int cleanup_fd) 4850{ 4851 int ret; 4852 struct holdarg ha; 4853 4854 ha.nvl = fnvlist_alloc(); 4855 ha.snapname = snapname; 4856 ha.tag = tag; 4857 ha.recursive = recursive; 4858 (void) zfs_hold_one(zfs_handle_dup(zhp), &ha); 4859 4860 if (nvlist_empty(ha.nvl)) { 4861 char errbuf[1024]; 4862 4863 fnvlist_free(ha.nvl); 4864 ret = ENOENT; 4865 (void) snprintf(errbuf, sizeof (errbuf), 4866 dgettext(TEXT_DOMAIN, 4867 "cannot hold snapshot '%s@%s'"), 4868 zhp->zfs_name, snapname); 4869 (void) zfs_standard_error(zhp->zfs_hdl, ret, errbuf); 4870 return (ret); 4871 } 4872 4873 ret = zfs_hold_nvl(zhp, cleanup_fd, ha.nvl); 4874 fnvlist_free(ha.nvl); 4875 4876 return (ret); 4877} 4878 4879int 4880zfs_hold_nvl(zfs_handle_t *zhp, int cleanup_fd, nvlist_t *holds) 4881{ 4882 int ret; 4883 nvlist_t *errors; 4884 libzfs_handle_t *hdl = zhp->zfs_hdl; 4885 char errbuf[1024]; 4886 nvpair_t *elem; 4887 4888 errors = NULL; 4889 ret = lzc_hold(holds, cleanup_fd, &errors); 4890 4891 if (ret == 0) { 4892 /* There may be errors even in the success case. */ 4893 fnvlist_free(errors); 4894 return (0); 4895 } 4896 4897 if (nvlist_empty(errors)) { 4898 /* no hold-specific errors */ 4899 (void) snprintf(errbuf, sizeof (errbuf), 4900 dgettext(TEXT_DOMAIN, "cannot hold")); 4901 switch (ret) { 4902 case ENOTSUP: 4903 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4904 "pool must be upgraded")); 4905 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf); 4906 break; 4907 case EINVAL: 4908 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf); 4909 break; 4910 default: 4911 (void) zfs_standard_error(hdl, ret, errbuf); 4912 } 4913 } 4914 4915 for (elem = nvlist_next_nvpair(errors, NULL); 4916 elem != NULL; 4917 elem = nvlist_next_nvpair(errors, elem)) { 4918 (void) snprintf(errbuf, sizeof (errbuf), 4919 dgettext(TEXT_DOMAIN, 4920 "cannot hold snapshot '%s'"), nvpair_name(elem)); 4921 switch (fnvpair_value_int32(elem)) { 4922 case E2BIG: 4923 /* 4924 * Temporary tags wind up having the ds object id 4925 * prepended. So even if we passed the length check 4926 * above, it's still possible for the tag to wind 4927 * up being slightly too long. 4928 */ 4929 (void) zfs_error(hdl, EZFS_TAGTOOLONG, errbuf); 4930 break; 4931 case EINVAL: 4932 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf); 4933 break; 4934 case EEXIST: 4935 (void) zfs_error(hdl, EZFS_REFTAG_HOLD, errbuf); 4936 break; 4937 default: 4938 (void) zfs_standard_error(hdl, 4939 fnvpair_value_int32(elem), errbuf); 4940 } 4941 } 4942 4943 fnvlist_free(errors); 4944 return (ret); 4945} 4946 4947static int 4948zfs_release_one(zfs_handle_t *zhp, void *arg) 4949{ 4950 struct holdarg *ha = arg; 4951 char name[ZFS_MAX_DATASET_NAME_LEN]; 4952 int rv = 0; 4953 nvlist_t *existing_holds; 4954 4955 (void) snprintf(name, sizeof (name), 4956 "%s@%s", zhp->zfs_name, ha->snapname); 4957 4958 if (lzc_get_holds(name, &existing_holds) != 0) { 4959 ha->error = ENOENT; 4960 } else if (!nvlist_exists(existing_holds, ha->tag)) { 4961 ha->error = ESRCH; 4962 } else { 4963 nvlist_t *torelease = fnvlist_alloc(); 4964 fnvlist_add_boolean(torelease, ha->tag); 4965 fnvlist_add_nvlist(ha->nvl, name, torelease); 4966 fnvlist_free(torelease); 4967 } 4968 4969 if (ha->recursive) 4970 rv = zfs_iter_filesystems(zhp, zfs_release_one, ha); 4971 zfs_close(zhp); 4972 return (rv); 4973} 4974 4975int 4976zfs_release(zfs_handle_t *zhp, const char *snapname, const char *tag, 4977 boolean_t recursive) 4978{ 4979 int ret; 4980 struct holdarg ha; 4981 nvlist_t *errors = NULL; 4982 nvpair_t *elem; 4983 libzfs_handle_t *hdl = zhp->zfs_hdl; 4984 char errbuf[1024]; 4985 4986 ha.nvl = fnvlist_alloc(); 4987 ha.snapname = snapname; 4988 ha.tag = tag; 4989 ha.recursive = recursive; 4990 ha.error = 0; 4991 (void) zfs_release_one(zfs_handle_dup(zhp), &ha); 4992 4993 if (nvlist_empty(ha.nvl)) { 4994 fnvlist_free(ha.nvl); 4995 ret = ha.error; 4996 (void) snprintf(errbuf, sizeof (errbuf), 4997 dgettext(TEXT_DOMAIN, 4998 "cannot release hold from snapshot '%s@%s'"), 4999 zhp->zfs_name, snapname); 5000 if (ret == ESRCH) { 5001 (void) zfs_error(hdl, EZFS_REFTAG_RELE, errbuf); 5002 } else { 5003 (void) zfs_standard_error(hdl, ret, errbuf); 5004 } 5005 return (ret); 5006 } 5007 5008 ret = lzc_release(ha.nvl, &errors); 5009 fnvlist_free(ha.nvl); 5010 5011 if (ret == 0) { 5012 /* There may be errors even in the success case. */ 5013 fnvlist_free(errors); 5014 return (0); 5015 } 5016 5017 if (nvlist_empty(errors)) { 5018 /* no hold-specific errors */ 5019 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 5020 "cannot release")); 5021 switch (errno) { 5022 case ENOTSUP: 5023 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 5024 "pool must be upgraded")); 5025 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf); 5026 break; 5027 default: 5028 (void) zfs_standard_error_fmt(hdl, errno, errbuf); 5029 } 5030 } 5031 5032 for (elem = nvlist_next_nvpair(errors, NULL); 5033 elem != NULL; 5034 elem = nvlist_next_nvpair(errors, elem)) { 5035 (void) snprintf(errbuf, sizeof (errbuf), 5036 dgettext(TEXT_DOMAIN, 5037 "cannot release hold from snapshot '%s'"), 5038 nvpair_name(elem)); 5039 switch (fnvpair_value_int32(elem)) { 5040 case ESRCH: 5041 (void) zfs_error(hdl, EZFS_REFTAG_RELE, errbuf); 5042 break; 5043 case EINVAL: 5044 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf); 5045 break; 5046 default: 5047 (void) zfs_standard_error_fmt(hdl, 5048 fnvpair_value_int32(elem), errbuf); 5049 } 5050 } 5051 5052 fnvlist_free(errors); 5053 return (ret); 5054} 5055 5056int 5057zfs_get_fsacl(zfs_handle_t *zhp, nvlist_t **nvl) 5058{ 5059 zfs_cmd_t zc = { 0 }; 5060 libzfs_handle_t *hdl = zhp->zfs_hdl; 5061 int nvsz = 2048; 5062 void *nvbuf; 5063 int err = 0; 5064 char errbuf[1024]; 5065 5066 assert(zhp->zfs_type == ZFS_TYPE_VOLUME || 5067 zhp->zfs_type == ZFS_TYPE_FILESYSTEM); 5068 5069tryagain: 5070 5071 nvbuf = malloc(nvsz); 5072 if (nvbuf == NULL) { 5073 err = (zfs_error(hdl, EZFS_NOMEM, strerror(errno))); 5074 goto out; 5075 } 5076 5077 zc.zc_nvlist_dst_size = nvsz; 5078 zc.zc_nvlist_dst = (uintptr_t)nvbuf; 5079 5080 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 5081 5082 if (ioctl(hdl->libzfs_fd, ZFS_IOC_GET_FSACL, &zc) != 0) { 5083 (void) snprintf(errbuf, sizeof (errbuf), 5084 dgettext(TEXT_DOMAIN, "cannot get permissions on '%s'"), 5085 zc.zc_name); 5086 switch (errno) { 5087 case ENOMEM: 5088 free(nvbuf); 5089 nvsz = zc.zc_nvlist_dst_size; 5090 goto tryagain; 5091 5092 case ENOTSUP: 5093 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 5094 "pool must be upgraded")); 5095 err = zfs_error(hdl, EZFS_BADVERSION, errbuf); 5096 break; 5097 case EINVAL: 5098 err = zfs_error(hdl, EZFS_BADTYPE, errbuf); 5099 break; 5100 case ENOENT: 5101 err = zfs_error(hdl, EZFS_NOENT, errbuf); 5102 break; 5103 default: 5104 err = zfs_standard_error_fmt(hdl, errno, errbuf); 5105 break; 5106 } 5107 } else { 5108 /* success */ 5109 int rc = nvlist_unpack(nvbuf, zc.zc_nvlist_dst_size, nvl, 0); 5110 if (rc) { 5111 (void) snprintf(errbuf, sizeof (errbuf), dgettext( 5112 TEXT_DOMAIN, "cannot get permissions on '%s'"), 5113 zc.zc_name); 5114 err = zfs_standard_error_fmt(hdl, rc, errbuf); 5115 } 5116 } 5117 5118 free(nvbuf); 5119out: 5120 return (err); 5121} 5122 5123int 5124zfs_set_fsacl(zfs_handle_t *zhp, boolean_t un, nvlist_t *nvl) 5125{ 5126 zfs_cmd_t zc = { 0 }; 5127 libzfs_handle_t *hdl = zhp->zfs_hdl; 5128 char *nvbuf; 5129 char errbuf[1024]; 5130 size_t nvsz; 5131 int err; 5132 5133 assert(zhp->zfs_type == ZFS_TYPE_VOLUME || 5134 zhp->zfs_type == ZFS_TYPE_FILESYSTEM); 5135 5136 err = nvlist_size(nvl, &nvsz, NV_ENCODE_NATIVE); 5137 assert(err == 0); 5138 5139 nvbuf = malloc(nvsz); 5140 5141 err = nvlist_pack(nvl, &nvbuf, &nvsz, NV_ENCODE_NATIVE, 0); 5142 assert(err == 0); 5143 5144 zc.zc_nvlist_src_size = nvsz; 5145 zc.zc_nvlist_src = (uintptr_t)nvbuf; 5146 zc.zc_perm_action = un; 5147 5148 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 5149 5150 if (zfs_ioctl(hdl, ZFS_IOC_SET_FSACL, &zc) != 0) { 5151 (void) snprintf(errbuf, sizeof (errbuf), 5152 dgettext(TEXT_DOMAIN, "cannot set permissions on '%s'"), 5153 zc.zc_name); 5154 switch (errno) { 5155 case ENOTSUP: 5156 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 5157 "pool must be upgraded")); 5158 err = zfs_error(hdl, EZFS_BADVERSION, errbuf); 5159 break; 5160 case EINVAL: 5161 err = zfs_error(hdl, EZFS_BADTYPE, errbuf); 5162 break; 5163 case ENOENT: 5164 err = zfs_error(hdl, EZFS_NOENT, errbuf); 5165 break; 5166 default: 5167 err = zfs_standard_error_fmt(hdl, errno, errbuf); 5168 break; 5169 } 5170 } 5171 5172 free(nvbuf); 5173 5174 return (err); 5175} 5176 5177int 5178zfs_get_holds(zfs_handle_t *zhp, nvlist_t **nvl) 5179{ 5180 int err; 5181 char errbuf[1024]; 5182 5183 err = lzc_get_holds(zhp->zfs_name, nvl); 5184 5185 if (err != 0) { 5186 libzfs_handle_t *hdl = zhp->zfs_hdl; 5187 5188 (void) snprintf(errbuf, sizeof (errbuf), 5189 dgettext(TEXT_DOMAIN, "cannot get holds for '%s'"), 5190 zhp->zfs_name); 5191 switch (err) { 5192 case ENOTSUP: 5193 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 5194 "pool must be upgraded")); 5195 err = zfs_error(hdl, EZFS_BADVERSION, errbuf); 5196 break; 5197 case EINVAL: 5198 err = zfs_error(hdl, EZFS_BADTYPE, errbuf); 5199 break; 5200 case ENOENT: 5201 err = zfs_error(hdl, EZFS_NOENT, errbuf); 5202 break; 5203 default: 5204 err = zfs_standard_error_fmt(hdl, errno, errbuf); 5205 break; 5206 } 5207 } 5208 5209 return (err); 5210} 5211 5212/* 5213 * Convert the zvol's volume size to an appropriate reservation. 5214 * Note: If this routine is updated, it is necessary to update the ZFS test 5215 * suite's shell version in reservation.kshlib. 5216 */ 5217uint64_t 5218zvol_volsize_to_reservation(uint64_t volsize, nvlist_t *props) 5219{ 5220 uint64_t numdb; 5221 uint64_t nblocks, volblocksize; 5222 int ncopies; 5223 char *strval; 5224 5225 if (nvlist_lookup_string(props, 5226 zfs_prop_to_name(ZFS_PROP_COPIES), &strval) == 0) 5227 ncopies = atoi(strval); 5228 else 5229 ncopies = 1; 5230 if (nvlist_lookup_uint64(props, 5231 zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE), 5232 &volblocksize) != 0) 5233 volblocksize = ZVOL_DEFAULT_BLOCKSIZE; 5234 nblocks = volsize/volblocksize; 5235 /* start with metadnode L0-L6 */ 5236 numdb = 7; 5237 /* calculate number of indirects */ 5238 while (nblocks > 1) { 5239 nblocks += DNODES_PER_LEVEL - 1; 5240 nblocks /= DNODES_PER_LEVEL; 5241 numdb += nblocks; 5242 } 5243 numdb *= MIN(SPA_DVAS_PER_BP, ncopies + 1); 5244 volsize *= ncopies; 5245 /* 5246 * this is exactly DN_MAX_INDBLKSHIFT when metadata isn't 5247 * compressed, but in practice they compress down to about 5248 * 1100 bytes 5249 */ 5250 numdb *= 1ULL << DN_MAX_INDBLKSHIFT; 5251 volsize += numdb; 5252 return (volsize); 5253} 5254 5255/* 5256 * Attach/detach the given filesystem to/from the given jail. 5257 */ 5258int 5259zfs_jail(zfs_handle_t *zhp, int jailid, int attach) 5260{ 5261 libzfs_handle_t *hdl = zhp->zfs_hdl; 5262 zfs_cmd_t zc = { 0 }; 5263 char errbuf[1024]; 5264 unsigned long cmd; 5265 int ret; 5266 5267 if (attach) { 5268 (void) snprintf(errbuf, sizeof (errbuf), 5269 dgettext(TEXT_DOMAIN, "cannot jail '%s'"), zhp->zfs_name); 5270 } else { 5271 (void) snprintf(errbuf, sizeof (errbuf), 5272 dgettext(TEXT_DOMAIN, "cannot unjail '%s'"), zhp->zfs_name); 5273 } 5274 5275 switch (zhp->zfs_type) { 5276 case ZFS_TYPE_VOLUME: 5277 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 5278 "volumes can not be jailed")); 5279 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 5280 case ZFS_TYPE_SNAPSHOT: 5281 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 5282 "snapshots can not be jailed")); 5283 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 5284 } 5285 assert(zhp->zfs_type == ZFS_TYPE_FILESYSTEM); 5286 5287 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 5288 zc.zc_objset_type = DMU_OST_ZFS; 5289 zc.zc_jailid = jailid; 5290 5291 cmd = attach ? ZFS_IOC_JAIL : ZFS_IOC_UNJAIL; 5292 if ((ret = ioctl(hdl->libzfs_fd, cmd, &zc)) != 0) 5293 zfs_standard_error(hdl, errno, errbuf); 5294 5295 return (ret); 5296} 5297