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 https://opensource.org/licenses/CDDL-1.0. 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 2019 Joyent, Inc. 25 * Copyright (c) 2011, 2020 by Delphix. All rights reserved. 26 * Copyright (c) 2012 DEY Storage Systems, Inc. All rights reserved. 27 * Copyright (c) 2012 Pawel Jakub Dawidek <pawel@dawidek.net>. 28 * Copyright (c) 2013 Martin Matuska. All rights reserved. 29 * Copyright (c) 2013 Steven Hartland. All rights reserved. 30 * Copyright 2017 Nexenta Systems, Inc. 31 * Copyright 2016 Igor Kozhukhov <ikozhukhov@gmail.com> 32 * Copyright 2017-2018 RackTop Systems. 33 * Copyright (c) 2019 Datto Inc. 34 * Copyright (c) 2019, loli10K <ezomori.nozomu@gmail.com> 35 * Copyright (c) 2021 Matt Fiddaman 36 */ 37 38 #include <ctype.h> 39 #include <errno.h> 40 #include <libintl.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 <pwd.h> 51 #include <grp.h> 52 #ifdef HAVE_IDMAP 53 #include <idmap.h> 54 #include <aclutils.h> 55 #include <directory.h> 56 #endif /* HAVE_IDMAP */ 57 58 #include <sys/dnode.h> 59 #include <sys/spa.h> 60 #include <sys/zap.h> 61 #include <sys/dsl_crypt.h> 62 #include <libzfs.h> 63 #include <libzutil.h> 64 65 #include "zfs_namecheck.h" 66 #include "zfs_prop.h" 67 #include "libzfs_impl.h" 68 #include "zfs_deleg.h" 69 70 static int userquota_propname_decode(const char *propname, boolean_t zoned, 71 zfs_userquota_prop_t *typep, char *domain, int domainlen, uint64_t *ridp); 72 73 /* 74 * Given a single type (not a mask of types), return the type in a human 75 * readable form. 76 */ 77 const char * 78 zfs_type_to_name(zfs_type_t type) 79 { 80 switch (type) { 81 case ZFS_TYPE_FILESYSTEM: 82 return (dgettext(TEXT_DOMAIN, "filesystem")); 83 case ZFS_TYPE_SNAPSHOT: 84 return (dgettext(TEXT_DOMAIN, "snapshot")); 85 case ZFS_TYPE_VOLUME: 86 return (dgettext(TEXT_DOMAIN, "volume")); 87 case ZFS_TYPE_POOL: 88 return (dgettext(TEXT_DOMAIN, "pool")); 89 case ZFS_TYPE_BOOKMARK: 90 return (dgettext(TEXT_DOMAIN, "bookmark")); 91 default: 92 assert(!"unhandled zfs_type_t"); 93 } 94 95 return (NULL); 96 } 97 98 /* 99 * Validate a ZFS path. This is used even before trying to open the dataset, to 100 * provide a more meaningful error message. We call zfs_error_aux() to 101 * explain exactly why the name was not valid. 102 */ 103 int 104 zfs_validate_name(libzfs_handle_t *hdl, const char *path, int type, 105 boolean_t modifying) 106 { 107 namecheck_err_t why; 108 char what; 109 110 if (!(type & ZFS_TYPE_SNAPSHOT) && strchr(path, '@') != NULL) { 111 if (hdl != NULL) 112 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 113 "snapshot delimiter '@' is not expected here")); 114 return (0); 115 } 116 117 if (type == ZFS_TYPE_SNAPSHOT && strchr(path, '@') == NULL) { 118 if (hdl != NULL) 119 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 120 "missing '@' delimiter in snapshot name")); 121 return (0); 122 } 123 124 if (!(type & ZFS_TYPE_BOOKMARK) && strchr(path, '#') != NULL) { 125 if (hdl != NULL) 126 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 127 "bookmark delimiter '#' is not expected here")); 128 return (0); 129 } 130 131 if (type == ZFS_TYPE_BOOKMARK && strchr(path, '#') == NULL) { 132 if (hdl != NULL) 133 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 134 "missing '#' delimiter in bookmark name")); 135 return (0); 136 } 137 138 if (modifying && strchr(path, '%') != NULL) { 139 if (hdl != NULL) 140 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 141 "invalid character %c in name"), '%'); 142 return (0); 143 } 144 145 if (entity_namecheck(path, &why, &what) != 0) { 146 if (hdl != NULL) { 147 switch (why) { 148 case NAME_ERR_TOOLONG: 149 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 150 "name is too long")); 151 break; 152 153 case NAME_ERR_LEADING_SLASH: 154 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 155 "leading slash in name")); 156 break; 157 158 case NAME_ERR_EMPTY_COMPONENT: 159 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 160 "empty component or misplaced '@'" 161 " or '#' delimiter in name")); 162 break; 163 164 case NAME_ERR_TRAILING_SLASH: 165 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 166 "trailing slash in name")); 167 break; 168 169 case NAME_ERR_INVALCHAR: 170 zfs_error_aux(hdl, 171 dgettext(TEXT_DOMAIN, "invalid character " 172 "'%c' in name"), what); 173 break; 174 175 case NAME_ERR_MULTIPLE_DELIMITERS: 176 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 177 "multiple '@' and/or '#' delimiters in " 178 "name")); 179 break; 180 181 case NAME_ERR_NOLETTER: 182 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 183 "pool doesn't begin with a letter")); 184 break; 185 186 case NAME_ERR_RESERVED: 187 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 188 "name is reserved")); 189 break; 190 191 case NAME_ERR_DISKLIKE: 192 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 193 "reserved disk name")); 194 break; 195 196 case NAME_ERR_SELF_REF: 197 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 198 "self reference, '.' is found in name")); 199 break; 200 201 case NAME_ERR_PARENT_REF: 202 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 203 "parent reference, '..' is found in name")); 204 break; 205 206 default: 207 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 208 "(%d) not defined"), why); 209 break; 210 } 211 } 212 213 return (0); 214 } 215 216 return (-1); 217 } 218 219 int 220 zfs_name_valid(const char *name, zfs_type_t type) 221 { 222 if (type == ZFS_TYPE_POOL) 223 return (zpool_name_valid(NULL, B_FALSE, name)); 224 return (zfs_validate_name(NULL, name, type, B_FALSE)); 225 } 226 227 /* 228 * This function takes the raw DSL properties, and filters out the user-defined 229 * properties into a separate nvlist. 230 */ 231 static nvlist_t * 232 process_user_props(zfs_handle_t *zhp, nvlist_t *props) 233 { 234 libzfs_handle_t *hdl = zhp->zfs_hdl; 235 nvpair_t *elem; 236 nvlist_t *nvl; 237 238 if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0) { 239 (void) no_memory(hdl); 240 return (NULL); 241 } 242 243 elem = NULL; 244 while ((elem = nvlist_next_nvpair(props, elem)) != NULL) { 245 if (!zfs_prop_user(nvpair_name(elem))) 246 continue; 247 248 nvlist_t *propval = fnvpair_value_nvlist(elem); 249 if (nvlist_add_nvlist(nvl, nvpair_name(elem), propval) != 0) { 250 nvlist_free(nvl); 251 (void) no_memory(hdl); 252 return (NULL); 253 } 254 } 255 256 return (nvl); 257 } 258 259 static zpool_handle_t * 260 zpool_add_handle(zfs_handle_t *zhp, const char *pool_name) 261 { 262 libzfs_handle_t *hdl = zhp->zfs_hdl; 263 zpool_handle_t *zph; 264 265 if ((zph = zpool_open_canfail(hdl, pool_name)) != NULL) { 266 if (hdl->libzfs_pool_handles != NULL) 267 zph->zpool_next = hdl->libzfs_pool_handles; 268 hdl->libzfs_pool_handles = zph; 269 } 270 return (zph); 271 } 272 273 static zpool_handle_t * 274 zpool_find_handle(zfs_handle_t *zhp, const char *pool_name, int len) 275 { 276 libzfs_handle_t *hdl = zhp->zfs_hdl; 277 zpool_handle_t *zph = hdl->libzfs_pool_handles; 278 279 while ((zph != NULL) && 280 (strncmp(pool_name, zpool_get_name(zph), len) != 0)) 281 zph = zph->zpool_next; 282 return (zph); 283 } 284 285 /* 286 * Returns a handle to the pool that contains the provided dataset. 287 * If a handle to that pool already exists then that handle is returned. 288 * Otherwise, a new handle is created and added to the list of handles. 289 */ 290 static zpool_handle_t * 291 zpool_handle(zfs_handle_t *zhp) 292 { 293 char *pool_name; 294 int len; 295 zpool_handle_t *zph; 296 297 len = strcspn(zhp->zfs_name, "/@#") + 1; 298 pool_name = zfs_alloc(zhp->zfs_hdl, len); 299 (void) strlcpy(pool_name, zhp->zfs_name, len); 300 301 zph = zpool_find_handle(zhp, pool_name, len); 302 if (zph == NULL) 303 zph = zpool_add_handle(zhp, pool_name); 304 305 free(pool_name); 306 return (zph); 307 } 308 309 void 310 zpool_free_handles(libzfs_handle_t *hdl) 311 { 312 zpool_handle_t *next, *zph = hdl->libzfs_pool_handles; 313 314 while (zph != NULL) { 315 next = zph->zpool_next; 316 zpool_close(zph); 317 zph = next; 318 } 319 hdl->libzfs_pool_handles = NULL; 320 } 321 322 /* 323 * Utility function to gather stats (objset and zpl) for the given object. 324 */ 325 static int 326 get_stats_ioctl(zfs_handle_t *zhp, zfs_cmd_t *zc) 327 { 328 libzfs_handle_t *hdl = zhp->zfs_hdl; 329 330 (void) strlcpy(zc->zc_name, zhp->zfs_name, sizeof (zc->zc_name)); 331 332 while (zfs_ioctl(hdl, ZFS_IOC_OBJSET_STATS, zc) != 0) { 333 if (errno == ENOMEM) 334 zcmd_expand_dst_nvlist(hdl, zc); 335 else 336 return (-1); 337 } 338 return (0); 339 } 340 341 /* 342 * Utility function to get the received properties of the given object. 343 */ 344 static int 345 get_recvd_props_ioctl(zfs_handle_t *zhp) 346 { 347 libzfs_handle_t *hdl = zhp->zfs_hdl; 348 nvlist_t *recvdprops; 349 zfs_cmd_t zc = {"\0"}; 350 int err; 351 352 zcmd_alloc_dst_nvlist(hdl, &zc, 0); 353 354 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 355 356 while (zfs_ioctl(hdl, ZFS_IOC_OBJSET_RECVD_PROPS, &zc) != 0) { 357 if (errno == ENOMEM) 358 zcmd_expand_dst_nvlist(hdl, &zc); 359 else { 360 zcmd_free_nvlists(&zc); 361 return (-1); 362 } 363 } 364 365 err = zcmd_read_dst_nvlist(zhp->zfs_hdl, &zc, &recvdprops); 366 zcmd_free_nvlists(&zc); 367 if (err != 0) 368 return (-1); 369 370 nvlist_free(zhp->zfs_recvd_props); 371 zhp->zfs_recvd_props = recvdprops; 372 373 return (0); 374 } 375 376 static int 377 put_stats_zhdl(zfs_handle_t *zhp, zfs_cmd_t *zc) 378 { 379 nvlist_t *allprops, *userprops; 380 381 zhp->zfs_dmustats = zc->zc_objset_stats; /* structure assignment */ 382 383 if (zcmd_read_dst_nvlist(zhp->zfs_hdl, zc, &allprops) != 0) { 384 return (-1); 385 } 386 387 /* 388 * XXX Why do we store the user props separately, in addition to 389 * storing them in zfs_props? 390 */ 391 if ((userprops = process_user_props(zhp, allprops)) == NULL) { 392 nvlist_free(allprops); 393 return (-1); 394 } 395 396 nvlist_free(zhp->zfs_props); 397 nvlist_free(zhp->zfs_user_props); 398 399 zhp->zfs_props = allprops; 400 zhp->zfs_user_props = userprops; 401 402 return (0); 403 } 404 405 static int 406 get_stats(zfs_handle_t *zhp) 407 { 408 int rc = 0; 409 zfs_cmd_t zc = {"\0"}; 410 411 zcmd_alloc_dst_nvlist(zhp->zfs_hdl, &zc, 0); 412 413 if (get_stats_ioctl(zhp, &zc) != 0) 414 rc = -1; 415 else if (put_stats_zhdl(zhp, &zc) != 0) 416 rc = -1; 417 zcmd_free_nvlists(&zc); 418 return (rc); 419 } 420 421 /* 422 * Refresh the properties currently stored in the handle. 423 */ 424 void 425 zfs_refresh_properties(zfs_handle_t *zhp) 426 { 427 (void) get_stats(zhp); 428 } 429 430 /* 431 * Makes a handle from the given dataset name. Used by zfs_open() and 432 * zfs_iter_* to create child handles on the fly. 433 */ 434 static int 435 make_dataset_handle_common(zfs_handle_t *zhp, zfs_cmd_t *zc) 436 { 437 if (put_stats_zhdl(zhp, zc) != 0) 438 return (-1); 439 440 /* 441 * We've managed to open the dataset and gather statistics. Determine 442 * the high-level type. 443 */ 444 if (zhp->zfs_dmustats.dds_type == DMU_OST_ZVOL) { 445 zhp->zfs_head_type = ZFS_TYPE_VOLUME; 446 } else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZFS) { 447 zhp->zfs_head_type = ZFS_TYPE_FILESYSTEM; 448 } else if (zhp->zfs_dmustats.dds_type == DMU_OST_OTHER) { 449 errno = EINVAL; 450 return (-1); 451 } else if (zhp->zfs_dmustats.dds_inconsistent) { 452 errno = EBUSY; 453 return (-1); 454 } else { 455 abort(); 456 } 457 458 if (zhp->zfs_dmustats.dds_is_snapshot) 459 zhp->zfs_type = ZFS_TYPE_SNAPSHOT; 460 else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZVOL) 461 zhp->zfs_type = ZFS_TYPE_VOLUME; 462 else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZFS) 463 zhp->zfs_type = ZFS_TYPE_FILESYSTEM; 464 else 465 abort(); /* we should never see any other types */ 466 467 if ((zhp->zpool_hdl = zpool_handle(zhp)) == NULL) 468 return (-1); 469 470 return (0); 471 } 472 473 zfs_handle_t * 474 make_dataset_handle(libzfs_handle_t *hdl, const char *path) 475 { 476 zfs_cmd_t zc = {"\0"}; 477 478 zfs_handle_t *zhp = calloc(1, sizeof (zfs_handle_t)); 479 480 if (zhp == NULL) 481 return (NULL); 482 483 zhp->zfs_hdl = hdl; 484 (void) strlcpy(zhp->zfs_name, path, sizeof (zhp->zfs_name)); 485 zcmd_alloc_dst_nvlist(hdl, &zc, 0); 486 487 if (get_stats_ioctl(zhp, &zc) == -1) { 488 zcmd_free_nvlists(&zc); 489 free(zhp); 490 return (NULL); 491 } 492 if (make_dataset_handle_common(zhp, &zc) == -1) { 493 free(zhp); 494 zhp = NULL; 495 } 496 zcmd_free_nvlists(&zc); 497 return (zhp); 498 } 499 500 zfs_handle_t * 501 make_dataset_handle_zc(libzfs_handle_t *hdl, zfs_cmd_t *zc) 502 { 503 zfs_handle_t *zhp = calloc(1, sizeof (zfs_handle_t)); 504 505 if (zhp == NULL) 506 return (NULL); 507 508 zhp->zfs_hdl = hdl; 509 (void) strlcpy(zhp->zfs_name, zc->zc_name, sizeof (zhp->zfs_name)); 510 if (make_dataset_handle_common(zhp, zc) == -1) { 511 free(zhp); 512 return (NULL); 513 } 514 return (zhp); 515 } 516 517 zfs_handle_t * 518 make_dataset_simple_handle_zc(zfs_handle_t *pzhp, zfs_cmd_t *zc) 519 { 520 zfs_handle_t *zhp = calloc(1, sizeof (zfs_handle_t)); 521 522 if (zhp == NULL) 523 return (NULL); 524 525 zhp->zfs_hdl = pzhp->zfs_hdl; 526 (void) strlcpy(zhp->zfs_name, zc->zc_name, sizeof (zhp->zfs_name)); 527 zhp->zfs_head_type = pzhp->zfs_type; 528 zhp->zfs_type = ZFS_TYPE_SNAPSHOT; 529 zhp->zpool_hdl = zpool_handle(zhp); 530 zhp->zfs_dmustats = zc->zc_objset_stats; 531 532 return (zhp); 533 } 534 535 zfs_handle_t * 536 zfs_handle_dup(zfs_handle_t *zhp_orig) 537 { 538 zfs_handle_t *zhp = calloc(1, sizeof (zfs_handle_t)); 539 540 if (zhp == NULL) 541 return (NULL); 542 543 zhp->zfs_hdl = zhp_orig->zfs_hdl; 544 zhp->zpool_hdl = zhp_orig->zpool_hdl; 545 (void) strlcpy(zhp->zfs_name, zhp_orig->zfs_name, 546 sizeof (zhp->zfs_name)); 547 zhp->zfs_type = zhp_orig->zfs_type; 548 zhp->zfs_head_type = zhp_orig->zfs_head_type; 549 zhp->zfs_dmustats = zhp_orig->zfs_dmustats; 550 if (zhp_orig->zfs_props != NULL) { 551 if (nvlist_dup(zhp_orig->zfs_props, &zhp->zfs_props, 0) != 0) { 552 (void) no_memory(zhp->zfs_hdl); 553 zfs_close(zhp); 554 return (NULL); 555 } 556 } 557 if (zhp_orig->zfs_user_props != NULL) { 558 if (nvlist_dup(zhp_orig->zfs_user_props, 559 &zhp->zfs_user_props, 0) != 0) { 560 (void) no_memory(zhp->zfs_hdl); 561 zfs_close(zhp); 562 return (NULL); 563 } 564 } 565 if (zhp_orig->zfs_recvd_props != NULL) { 566 if (nvlist_dup(zhp_orig->zfs_recvd_props, 567 &zhp->zfs_recvd_props, 0)) { 568 (void) no_memory(zhp->zfs_hdl); 569 zfs_close(zhp); 570 return (NULL); 571 } 572 } 573 zhp->zfs_mntcheck = zhp_orig->zfs_mntcheck; 574 if (zhp_orig->zfs_mntopts != NULL) { 575 zhp->zfs_mntopts = zfs_strdup(zhp_orig->zfs_hdl, 576 zhp_orig->zfs_mntopts); 577 } 578 zhp->zfs_props_table = zhp_orig->zfs_props_table; 579 return (zhp); 580 } 581 582 boolean_t 583 zfs_bookmark_exists(const char *path) 584 { 585 nvlist_t *bmarks; 586 nvlist_t *props; 587 char fsname[ZFS_MAX_DATASET_NAME_LEN]; 588 char *bmark_name; 589 char *pound; 590 int err; 591 boolean_t rv; 592 593 (void) strlcpy(fsname, path, sizeof (fsname)); 594 pound = strchr(fsname, '#'); 595 if (pound == NULL) 596 return (B_FALSE); 597 598 *pound = '\0'; 599 bmark_name = pound + 1; 600 props = fnvlist_alloc(); 601 err = lzc_get_bookmarks(fsname, props, &bmarks); 602 nvlist_free(props); 603 if (err != 0) { 604 nvlist_free(bmarks); 605 return (B_FALSE); 606 } 607 608 rv = nvlist_exists(bmarks, bmark_name); 609 nvlist_free(bmarks); 610 return (rv); 611 } 612 613 zfs_handle_t * 614 make_bookmark_handle(zfs_handle_t *parent, const char *path, 615 nvlist_t *bmark_props) 616 { 617 zfs_handle_t *zhp = calloc(1, sizeof (zfs_handle_t)); 618 619 if (zhp == NULL) 620 return (NULL); 621 622 /* Fill in the name. */ 623 zhp->zfs_hdl = parent->zfs_hdl; 624 (void) strlcpy(zhp->zfs_name, path, sizeof (zhp->zfs_name)); 625 626 /* Set the property lists. */ 627 if (nvlist_dup(bmark_props, &zhp->zfs_props, 0) != 0) { 628 free(zhp); 629 return (NULL); 630 } 631 632 /* Set the types. */ 633 zhp->zfs_head_type = parent->zfs_head_type; 634 zhp->zfs_type = ZFS_TYPE_BOOKMARK; 635 636 if ((zhp->zpool_hdl = zpool_handle(zhp)) == NULL) { 637 nvlist_free(zhp->zfs_props); 638 free(zhp); 639 return (NULL); 640 } 641 642 return (zhp); 643 } 644 645 struct zfs_open_bookmarks_cb_data { 646 const char *path; 647 zfs_handle_t *zhp; 648 }; 649 650 static int 651 zfs_open_bookmarks_cb(zfs_handle_t *zhp, void *data) 652 { 653 struct zfs_open_bookmarks_cb_data *dp = data; 654 655 /* 656 * Is it the one we are looking for? 657 */ 658 if (strcmp(dp->path, zfs_get_name(zhp)) == 0) { 659 /* 660 * We found it. Save it and let the caller know we are done. 661 */ 662 dp->zhp = zhp; 663 return (EEXIST); 664 } 665 666 /* 667 * Not found. Close the handle and ask for another one. 668 */ 669 zfs_close(zhp); 670 return (0); 671 } 672 673 /* 674 * Opens the given snapshot, bookmark, filesystem, or volume. The 'types' 675 * argument is a mask of acceptable types. The function will print an 676 * appropriate error message and return NULL if it can't be opened. 677 */ 678 zfs_handle_t * 679 zfs_open(libzfs_handle_t *hdl, const char *path, int types) 680 { 681 zfs_handle_t *zhp; 682 char errbuf[ERRBUFLEN]; 683 char *bookp; 684 685 (void) snprintf(errbuf, sizeof (errbuf), 686 dgettext(TEXT_DOMAIN, "cannot open '%s'"), path); 687 688 /* 689 * Validate the name before we even try to open it. 690 */ 691 if (!zfs_validate_name(hdl, path, types, B_FALSE)) { 692 (void) zfs_error(hdl, EZFS_INVALIDNAME, errbuf); 693 return (NULL); 694 } 695 696 /* 697 * Bookmarks needs to be handled separately. 698 */ 699 bookp = strchr(path, '#'); 700 if (bookp == NULL) { 701 /* 702 * Try to get stats for the dataset, which will tell us if it 703 * exists. 704 */ 705 errno = 0; 706 if ((zhp = make_dataset_handle(hdl, path)) == NULL) { 707 (void) zfs_standard_error(hdl, errno, errbuf); 708 return (NULL); 709 } 710 } else { 711 char dsname[ZFS_MAX_DATASET_NAME_LEN]; 712 zfs_handle_t *pzhp; 713 struct zfs_open_bookmarks_cb_data cb_data = {path, NULL}; 714 715 /* 716 * We need to cut out '#' and everything after '#' 717 * to get the parent dataset name only. 718 */ 719 assert(bookp - path < sizeof (dsname)); 720 (void) strlcpy(dsname, path, 721 MIN(sizeof (dsname), bookp - path + 1)); 722 723 /* 724 * Create handle for the parent dataset. 725 */ 726 errno = 0; 727 if ((pzhp = make_dataset_handle(hdl, dsname)) == NULL) { 728 (void) zfs_standard_error(hdl, errno, errbuf); 729 return (NULL); 730 } 731 732 /* 733 * Iterate bookmarks to find the right one. 734 */ 735 errno = 0; 736 if ((zfs_iter_bookmarks(pzhp, zfs_open_bookmarks_cb, 737 &cb_data) == 0) && (cb_data.zhp == NULL)) { 738 (void) zfs_error(hdl, EZFS_NOENT, errbuf); 739 zfs_close(pzhp); 740 return (NULL); 741 } 742 if (cb_data.zhp == NULL) { 743 (void) zfs_standard_error(hdl, errno, errbuf); 744 zfs_close(pzhp); 745 return (NULL); 746 } 747 zhp = cb_data.zhp; 748 749 /* 750 * Cleanup. 751 */ 752 zfs_close(pzhp); 753 } 754 755 if (!(types & zhp->zfs_type)) { 756 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf); 757 zfs_close(zhp); 758 return (NULL); 759 } 760 761 return (zhp); 762 } 763 764 /* 765 * Release a ZFS handle. Nothing to do but free the associated memory. 766 */ 767 void 768 zfs_close(zfs_handle_t *zhp) 769 { 770 if (zhp->zfs_mntopts) 771 free(zhp->zfs_mntopts); 772 nvlist_free(zhp->zfs_props); 773 nvlist_free(zhp->zfs_user_props); 774 nvlist_free(zhp->zfs_recvd_props); 775 free(zhp); 776 } 777 778 typedef struct mnttab_node { 779 struct mnttab mtn_mt; 780 avl_node_t mtn_node; 781 } mnttab_node_t; 782 783 static int 784 libzfs_mnttab_cache_compare(const void *arg1, const void *arg2) 785 { 786 const mnttab_node_t *mtn1 = (const mnttab_node_t *)arg1; 787 const mnttab_node_t *mtn2 = (const mnttab_node_t *)arg2; 788 int rv; 789 790 rv = strcmp(mtn1->mtn_mt.mnt_special, mtn2->mtn_mt.mnt_special); 791 792 return (TREE_ISIGN(rv)); 793 } 794 795 void 796 libzfs_mnttab_init(libzfs_handle_t *hdl) 797 { 798 pthread_mutex_init(&hdl->libzfs_mnttab_cache_lock, NULL); 799 assert(avl_numnodes(&hdl->libzfs_mnttab_cache) == 0); 800 avl_create(&hdl->libzfs_mnttab_cache, libzfs_mnttab_cache_compare, 801 sizeof (mnttab_node_t), offsetof(mnttab_node_t, mtn_node)); 802 } 803 804 static int 805 libzfs_mnttab_update(libzfs_handle_t *hdl) 806 { 807 FILE *mnttab; 808 struct mnttab entry; 809 810 if ((mnttab = fopen(MNTTAB, "re")) == NULL) 811 return (ENOENT); 812 813 while (getmntent(mnttab, &entry) == 0) { 814 mnttab_node_t *mtn; 815 avl_index_t where; 816 817 if (strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0) 818 continue; 819 820 mtn = zfs_alloc(hdl, sizeof (mnttab_node_t)); 821 mtn->mtn_mt.mnt_special = zfs_strdup(hdl, entry.mnt_special); 822 mtn->mtn_mt.mnt_mountp = zfs_strdup(hdl, entry.mnt_mountp); 823 mtn->mtn_mt.mnt_fstype = zfs_strdup(hdl, entry.mnt_fstype); 824 mtn->mtn_mt.mnt_mntopts = zfs_strdup(hdl, entry.mnt_mntopts); 825 826 /* Exclude duplicate mounts */ 827 if (avl_find(&hdl->libzfs_mnttab_cache, mtn, &where) != NULL) { 828 free(mtn->mtn_mt.mnt_special); 829 free(mtn->mtn_mt.mnt_mountp); 830 free(mtn->mtn_mt.mnt_fstype); 831 free(mtn->mtn_mt.mnt_mntopts); 832 free(mtn); 833 continue; 834 } 835 836 avl_add(&hdl->libzfs_mnttab_cache, mtn); 837 } 838 839 (void) fclose(mnttab); 840 return (0); 841 } 842 843 void 844 libzfs_mnttab_fini(libzfs_handle_t *hdl) 845 { 846 void *cookie = NULL; 847 mnttab_node_t *mtn; 848 849 while ((mtn = avl_destroy_nodes(&hdl->libzfs_mnttab_cache, &cookie)) 850 != NULL) { 851 free(mtn->mtn_mt.mnt_special); 852 free(mtn->mtn_mt.mnt_mountp); 853 free(mtn->mtn_mt.mnt_fstype); 854 free(mtn->mtn_mt.mnt_mntopts); 855 free(mtn); 856 } 857 avl_destroy(&hdl->libzfs_mnttab_cache); 858 (void) pthread_mutex_destroy(&hdl->libzfs_mnttab_cache_lock); 859 } 860 861 void 862 libzfs_mnttab_cache(libzfs_handle_t *hdl, boolean_t enable) 863 { 864 hdl->libzfs_mnttab_enable = enable; 865 } 866 867 int 868 libzfs_mnttab_find(libzfs_handle_t *hdl, const char *fsname, 869 struct mnttab *entry) 870 { 871 FILE *mnttab; 872 mnttab_node_t find; 873 mnttab_node_t *mtn; 874 int ret = ENOENT; 875 876 if (!hdl->libzfs_mnttab_enable) { 877 struct mnttab srch = { 0 }; 878 879 if (avl_numnodes(&hdl->libzfs_mnttab_cache)) 880 libzfs_mnttab_fini(hdl); 881 882 if ((mnttab = fopen(MNTTAB, "re")) == NULL) 883 return (ENOENT); 884 885 srch.mnt_special = (char *)fsname; 886 srch.mnt_fstype = (char *)MNTTYPE_ZFS; 887 ret = getmntany(mnttab, entry, &srch) ? ENOENT : 0; 888 (void) fclose(mnttab); 889 return (ret); 890 } 891 892 pthread_mutex_lock(&hdl->libzfs_mnttab_cache_lock); 893 if (avl_numnodes(&hdl->libzfs_mnttab_cache) == 0) { 894 int error; 895 896 if ((error = libzfs_mnttab_update(hdl)) != 0) { 897 pthread_mutex_unlock(&hdl->libzfs_mnttab_cache_lock); 898 return (error); 899 } 900 } 901 902 find.mtn_mt.mnt_special = (char *)fsname; 903 mtn = avl_find(&hdl->libzfs_mnttab_cache, &find, NULL); 904 if (mtn) { 905 *entry = mtn->mtn_mt; 906 ret = 0; 907 } 908 pthread_mutex_unlock(&hdl->libzfs_mnttab_cache_lock); 909 return (ret); 910 } 911 912 void 913 libzfs_mnttab_add(libzfs_handle_t *hdl, const char *special, 914 const char *mountp, const char *mntopts) 915 { 916 mnttab_node_t *mtn; 917 918 pthread_mutex_lock(&hdl->libzfs_mnttab_cache_lock); 919 if (avl_numnodes(&hdl->libzfs_mnttab_cache) != 0) { 920 mtn = zfs_alloc(hdl, sizeof (mnttab_node_t)); 921 mtn->mtn_mt.mnt_special = zfs_strdup(hdl, special); 922 mtn->mtn_mt.mnt_mountp = zfs_strdup(hdl, mountp); 923 mtn->mtn_mt.mnt_fstype = zfs_strdup(hdl, MNTTYPE_ZFS); 924 mtn->mtn_mt.mnt_mntopts = zfs_strdup(hdl, mntopts); 925 /* 926 * Another thread may have already added this entry 927 * via libzfs_mnttab_update. If so we should skip it. 928 */ 929 if (avl_find(&hdl->libzfs_mnttab_cache, mtn, NULL) != NULL) { 930 free(mtn->mtn_mt.mnt_special); 931 free(mtn->mtn_mt.mnt_mountp); 932 free(mtn->mtn_mt.mnt_fstype); 933 free(mtn->mtn_mt.mnt_mntopts); 934 free(mtn); 935 } else { 936 avl_add(&hdl->libzfs_mnttab_cache, mtn); 937 } 938 } 939 pthread_mutex_unlock(&hdl->libzfs_mnttab_cache_lock); 940 } 941 942 void 943 libzfs_mnttab_remove(libzfs_handle_t *hdl, const char *fsname) 944 { 945 mnttab_node_t find; 946 mnttab_node_t *ret; 947 948 pthread_mutex_lock(&hdl->libzfs_mnttab_cache_lock); 949 find.mtn_mt.mnt_special = (char *)fsname; 950 if ((ret = avl_find(&hdl->libzfs_mnttab_cache, (void *)&find, NULL)) 951 != NULL) { 952 avl_remove(&hdl->libzfs_mnttab_cache, ret); 953 free(ret->mtn_mt.mnt_special); 954 free(ret->mtn_mt.mnt_mountp); 955 free(ret->mtn_mt.mnt_fstype); 956 free(ret->mtn_mt.mnt_mntopts); 957 free(ret); 958 } 959 pthread_mutex_unlock(&hdl->libzfs_mnttab_cache_lock); 960 } 961 962 int 963 zfs_spa_version(zfs_handle_t *zhp, int *spa_version) 964 { 965 zpool_handle_t *zpool_handle = zhp->zpool_hdl; 966 967 if (zpool_handle == NULL) 968 return (-1); 969 970 *spa_version = zpool_get_prop_int(zpool_handle, 971 ZPOOL_PROP_VERSION, NULL); 972 return (0); 973 } 974 975 /* 976 * The choice of reservation property depends on the SPA version. 977 */ 978 static int 979 zfs_which_resv_prop(zfs_handle_t *zhp, zfs_prop_t *resv_prop) 980 { 981 int spa_version; 982 983 if (zfs_spa_version(zhp, &spa_version) < 0) 984 return (-1); 985 986 if (spa_version >= SPA_VERSION_REFRESERVATION) 987 *resv_prop = ZFS_PROP_REFRESERVATION; 988 else 989 *resv_prop = ZFS_PROP_RESERVATION; 990 991 return (0); 992 } 993 994 /* 995 * Given an nvlist of properties to set, validates that they are correct, and 996 * parses any numeric properties (index, boolean, etc) if they are specified as 997 * strings. 998 */ 999 nvlist_t * 1000 zfs_valid_proplist(libzfs_handle_t *hdl, zfs_type_t type, nvlist_t *nvl, 1001 uint64_t zoned, zfs_handle_t *zhp, zpool_handle_t *zpool_hdl, 1002 boolean_t key_params_ok, const char *errbuf) 1003 { 1004 nvpair_t *elem; 1005 uint64_t intval; 1006 char *strval; 1007 zfs_prop_t prop; 1008 nvlist_t *ret; 1009 int chosen_normal = -1; 1010 int chosen_utf = -1; 1011 1012 if (nvlist_alloc(&ret, NV_UNIQUE_NAME, 0) != 0) { 1013 (void) no_memory(hdl); 1014 return (NULL); 1015 } 1016 1017 /* 1018 * Make sure this property is valid and applies to this type. 1019 */ 1020 1021 elem = NULL; 1022 while ((elem = nvlist_next_nvpair(nvl, elem)) != NULL) { 1023 const char *propname = nvpair_name(elem); 1024 1025 prop = zfs_name_to_prop(propname); 1026 if (prop == ZPROP_USERPROP && zfs_prop_user(propname)) { 1027 /* 1028 * This is a user property: make sure it's a 1029 * string, and that it's less than ZAP_MAXNAMELEN. 1030 */ 1031 if (nvpair_type(elem) != DATA_TYPE_STRING) { 1032 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1033 "'%s' must be a string"), propname); 1034 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1035 goto error; 1036 } 1037 1038 if (strlen(nvpair_name(elem)) >= ZAP_MAXNAMELEN) { 1039 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1040 "property name '%s' is too long"), 1041 propname); 1042 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1043 goto error; 1044 } 1045 1046 (void) nvpair_value_string(elem, &strval); 1047 if (nvlist_add_string(ret, propname, strval) != 0) { 1048 (void) no_memory(hdl); 1049 goto error; 1050 } 1051 continue; 1052 } 1053 1054 /* 1055 * Currently, only user properties can be modified on 1056 * snapshots. 1057 */ 1058 if (type == ZFS_TYPE_SNAPSHOT) { 1059 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1060 "this property can not be modified for snapshots")); 1061 (void) zfs_error(hdl, EZFS_PROPTYPE, errbuf); 1062 goto error; 1063 } 1064 1065 if (prop == ZPROP_USERPROP && zfs_prop_userquota(propname)) { 1066 zfs_userquota_prop_t uqtype; 1067 char *newpropname = NULL; 1068 char domain[128]; 1069 uint64_t rid; 1070 uint64_t valary[3]; 1071 int rc; 1072 1073 if (userquota_propname_decode(propname, zoned, 1074 &uqtype, domain, sizeof (domain), &rid) != 0) { 1075 zfs_error_aux(hdl, 1076 dgettext(TEXT_DOMAIN, 1077 "'%s' has an invalid user/group name"), 1078 propname); 1079 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1080 goto error; 1081 } 1082 1083 if (uqtype != ZFS_PROP_USERQUOTA && 1084 uqtype != ZFS_PROP_GROUPQUOTA && 1085 uqtype != ZFS_PROP_USEROBJQUOTA && 1086 uqtype != ZFS_PROP_GROUPOBJQUOTA && 1087 uqtype != ZFS_PROP_PROJECTQUOTA && 1088 uqtype != ZFS_PROP_PROJECTOBJQUOTA) { 1089 zfs_error_aux(hdl, 1090 dgettext(TEXT_DOMAIN, "'%s' is readonly"), 1091 propname); 1092 (void) zfs_error(hdl, EZFS_PROPREADONLY, 1093 errbuf); 1094 goto error; 1095 } 1096 1097 if (nvpair_type(elem) == DATA_TYPE_STRING) { 1098 (void) nvpair_value_string(elem, &strval); 1099 if (strcmp(strval, "none") == 0) { 1100 intval = 0; 1101 } else if (zfs_nicestrtonum(hdl, 1102 strval, &intval) != 0) { 1103 (void) zfs_error(hdl, 1104 EZFS_BADPROP, errbuf); 1105 goto error; 1106 } 1107 } else if (nvpair_type(elem) == 1108 DATA_TYPE_UINT64) { 1109 (void) nvpair_value_uint64(elem, &intval); 1110 if (intval == 0) { 1111 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1112 "use 'none' to disable " 1113 "{user|group|project}quota")); 1114 goto error; 1115 } 1116 } else { 1117 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1118 "'%s' must be a number"), propname); 1119 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1120 goto error; 1121 } 1122 1123 /* 1124 * Encode the prop name as 1125 * userquota@<hex-rid>-domain, to make it easy 1126 * for the kernel to decode. 1127 */ 1128 rc = asprintf(&newpropname, "%s%llx-%s", 1129 zfs_userquota_prop_prefixes[uqtype], 1130 (longlong_t)rid, domain); 1131 if (rc == -1 || newpropname == NULL) { 1132 (void) no_memory(hdl); 1133 goto error; 1134 } 1135 1136 valary[0] = uqtype; 1137 valary[1] = rid; 1138 valary[2] = intval; 1139 if (nvlist_add_uint64_array(ret, newpropname, 1140 valary, 3) != 0) { 1141 free(newpropname); 1142 (void) no_memory(hdl); 1143 goto error; 1144 } 1145 free(newpropname); 1146 continue; 1147 } else if (prop == ZPROP_USERPROP && 1148 zfs_prop_written(propname)) { 1149 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1150 "'%s' is readonly"), 1151 propname); 1152 (void) zfs_error(hdl, EZFS_PROPREADONLY, errbuf); 1153 goto error; 1154 } 1155 1156 if (prop == ZPROP_INVAL) { 1157 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1158 "invalid property '%s'"), propname); 1159 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1160 goto error; 1161 } 1162 1163 if (!zfs_prop_valid_for_type(prop, type, B_FALSE)) { 1164 zfs_error_aux(hdl, 1165 dgettext(TEXT_DOMAIN, "'%s' does not " 1166 "apply to datasets of this type"), propname); 1167 (void) zfs_error(hdl, EZFS_PROPTYPE, errbuf); 1168 goto error; 1169 } 1170 1171 if (zfs_prop_readonly(prop) && 1172 !(zfs_prop_setonce(prop) && zhp == NULL) && 1173 !(zfs_prop_encryption_key_param(prop) && key_params_ok)) { 1174 zfs_error_aux(hdl, 1175 dgettext(TEXT_DOMAIN, "'%s' is readonly"), 1176 propname); 1177 (void) zfs_error(hdl, EZFS_PROPREADONLY, errbuf); 1178 goto error; 1179 } 1180 1181 if (zprop_parse_value(hdl, elem, prop, type, ret, 1182 &strval, &intval, errbuf) != 0) 1183 goto error; 1184 1185 /* 1186 * Perform some additional checks for specific properties. 1187 */ 1188 switch (prop) { 1189 case ZFS_PROP_VERSION: 1190 { 1191 int version; 1192 1193 if (zhp == NULL) 1194 break; 1195 version = zfs_prop_get_int(zhp, ZFS_PROP_VERSION); 1196 if (intval < version) { 1197 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1198 "Can not downgrade; already at version %u"), 1199 version); 1200 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1201 goto error; 1202 } 1203 break; 1204 } 1205 1206 case ZFS_PROP_VOLBLOCKSIZE: 1207 case ZFS_PROP_RECORDSIZE: 1208 { 1209 int maxbs = SPA_MAXBLOCKSIZE; 1210 char buf[64]; 1211 1212 if (zpool_hdl != NULL) { 1213 maxbs = zpool_get_prop_int(zpool_hdl, 1214 ZPOOL_PROP_MAXBLOCKSIZE, NULL); 1215 } 1216 /* 1217 * The value must be a power of two between 1218 * SPA_MINBLOCKSIZE and maxbs. 1219 */ 1220 if (intval < SPA_MINBLOCKSIZE || 1221 intval > maxbs || !ISP2(intval)) { 1222 zfs_nicebytes(maxbs, buf, sizeof (buf)); 1223 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1224 "'%s' must be power of 2 from 512B " 1225 "to %s"), propname, buf); 1226 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1227 goto error; 1228 } 1229 break; 1230 } 1231 1232 case ZFS_PROP_SPECIAL_SMALL_BLOCKS: 1233 { 1234 int maxbs = SPA_OLD_MAXBLOCKSIZE; 1235 char buf[64]; 1236 1237 if (zpool_hdl != NULL) { 1238 char state[64] = ""; 1239 1240 maxbs = zpool_get_prop_int(zpool_hdl, 1241 ZPOOL_PROP_MAXBLOCKSIZE, NULL); 1242 1243 /* 1244 * Issue a warning but do not fail so that 1245 * tests for settable properties succeed. 1246 */ 1247 if (zpool_prop_get_feature(zpool_hdl, 1248 "feature@allocation_classes", state, 1249 sizeof (state)) != 0 || 1250 strcmp(state, ZFS_FEATURE_ACTIVE) != 0) { 1251 (void) fprintf(stderr, gettext( 1252 "%s: property requires a special " 1253 "device in the pool\n"), propname); 1254 } 1255 } 1256 if (intval != 0 && 1257 (intval < SPA_MINBLOCKSIZE || 1258 intval > maxbs || !ISP2(intval))) { 1259 zfs_nicebytes(maxbs, buf, sizeof (buf)); 1260 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1261 "invalid '%s=%llu' property: must be zero " 1262 "or a power of 2 from 512B to %s"), 1263 propname, (unsigned long long)intval, buf); 1264 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1265 goto error; 1266 } 1267 break; 1268 } 1269 1270 case ZFS_PROP_MLSLABEL: 1271 { 1272 #ifdef HAVE_MLSLABEL 1273 /* 1274 * Verify the mlslabel string and convert to 1275 * internal hex label string. 1276 */ 1277 1278 m_label_t *new_sl; 1279 char *hex = NULL; /* internal label string */ 1280 1281 /* Default value is already OK. */ 1282 if (strcasecmp(strval, ZFS_MLSLABEL_DEFAULT) == 0) 1283 break; 1284 1285 /* Verify the label can be converted to binary form */ 1286 if (((new_sl = m_label_alloc(MAC_LABEL)) == NULL) || 1287 (str_to_label(strval, &new_sl, MAC_LABEL, 1288 L_NO_CORRECTION, NULL) == -1)) { 1289 goto badlabel; 1290 } 1291 1292 /* Now translate to hex internal label string */ 1293 if (label_to_str(new_sl, &hex, M_INTERNAL, 1294 DEF_NAMES) != 0) { 1295 if (hex) 1296 free(hex); 1297 goto badlabel; 1298 } 1299 m_label_free(new_sl); 1300 1301 /* If string is already in internal form, we're done. */ 1302 if (strcmp(strval, hex) == 0) { 1303 free(hex); 1304 break; 1305 } 1306 1307 /* Replace the label string with the internal form. */ 1308 (void) nvlist_remove(ret, zfs_prop_to_name(prop), 1309 DATA_TYPE_STRING); 1310 fnvlist_add_string(ret, zfs_prop_to_name(prop), hex); 1311 free(hex); 1312 1313 break; 1314 1315 badlabel: 1316 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1317 "invalid mlslabel '%s'"), strval); 1318 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1319 m_label_free(new_sl); /* OK if null */ 1320 goto error; 1321 #else 1322 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1323 "mlslabels are unsupported")); 1324 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1325 goto error; 1326 #endif /* HAVE_MLSLABEL */ 1327 } 1328 1329 case ZFS_PROP_MOUNTPOINT: 1330 { 1331 namecheck_err_t why; 1332 1333 if (strcmp(strval, ZFS_MOUNTPOINT_NONE) == 0 || 1334 strcmp(strval, ZFS_MOUNTPOINT_LEGACY) == 0) 1335 break; 1336 1337 if (mountpoint_namecheck(strval, &why)) { 1338 switch (why) { 1339 case NAME_ERR_LEADING_SLASH: 1340 zfs_error_aux(hdl, 1341 dgettext(TEXT_DOMAIN, 1342 "'%s' must be an absolute path, " 1343 "'none', or 'legacy'"), propname); 1344 break; 1345 case NAME_ERR_TOOLONG: 1346 zfs_error_aux(hdl, 1347 dgettext(TEXT_DOMAIN, 1348 "component of '%s' is too long"), 1349 propname); 1350 break; 1351 1352 default: 1353 zfs_error_aux(hdl, 1354 dgettext(TEXT_DOMAIN, 1355 "(%d) not defined"), 1356 why); 1357 break; 1358 } 1359 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1360 goto error; 1361 } 1362 zfs_fallthrough; 1363 } 1364 1365 case ZFS_PROP_SHARESMB: 1366 case ZFS_PROP_SHARENFS: 1367 /* 1368 * For the mountpoint and sharenfs or sharesmb 1369 * properties, check if it can be set in a 1370 * global/non-global zone based on 1371 * the zoned property value: 1372 * 1373 * global zone non-global zone 1374 * -------------------------------------------------- 1375 * zoned=on mountpoint (no) mountpoint (yes) 1376 * sharenfs (no) sharenfs (no) 1377 * sharesmb (no) sharesmb (no) 1378 * 1379 * zoned=off mountpoint (yes) N/A 1380 * sharenfs (yes) 1381 * sharesmb (yes) 1382 */ 1383 if (zoned) { 1384 if (getzoneid() == GLOBAL_ZONEID) { 1385 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1386 "'%s' cannot be set on " 1387 "dataset in a non-global zone"), 1388 propname); 1389 (void) zfs_error(hdl, EZFS_ZONED, 1390 errbuf); 1391 goto error; 1392 } else if (prop == ZFS_PROP_SHARENFS || 1393 prop == ZFS_PROP_SHARESMB) { 1394 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1395 "'%s' cannot be set in " 1396 "a non-global zone"), propname); 1397 (void) zfs_error(hdl, EZFS_ZONED, 1398 errbuf); 1399 goto error; 1400 } 1401 } else if (getzoneid() != GLOBAL_ZONEID) { 1402 /* 1403 * If zoned property is 'off', this must be in 1404 * a global zone. If not, something is wrong. 1405 */ 1406 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1407 "'%s' cannot be set while dataset " 1408 "'zoned' property is set"), propname); 1409 (void) zfs_error(hdl, EZFS_ZONED, errbuf); 1410 goto error; 1411 } 1412 1413 /* 1414 * At this point, it is legitimate to set the 1415 * property. Now we want to make sure that the 1416 * property value is valid if it is sharenfs. 1417 */ 1418 if ((prop == ZFS_PROP_SHARENFS || 1419 prop == ZFS_PROP_SHARESMB) && 1420 strcmp(strval, "on") != 0 && 1421 strcmp(strval, "off") != 0) { 1422 enum sa_protocol proto; 1423 1424 if (prop == ZFS_PROP_SHARESMB) 1425 proto = SA_PROTOCOL_SMB; 1426 else 1427 proto = SA_PROTOCOL_NFS; 1428 1429 if (sa_validate_shareopts(strval, proto) != 1430 SA_OK) { 1431 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1432 "'%s' cannot be set to invalid " 1433 "options"), propname); 1434 (void) zfs_error(hdl, EZFS_BADPROP, 1435 errbuf); 1436 goto error; 1437 } 1438 } 1439 1440 break; 1441 1442 case ZFS_PROP_KEYLOCATION: 1443 if (!zfs_prop_valid_keylocation(strval, B_FALSE)) { 1444 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1445 "invalid keylocation")); 1446 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1447 goto error; 1448 } 1449 1450 if (zhp != NULL) { 1451 uint64_t crypt = 1452 zfs_prop_get_int(zhp, ZFS_PROP_ENCRYPTION); 1453 1454 if (crypt == ZIO_CRYPT_OFF && 1455 strcmp(strval, "none") != 0) { 1456 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1457 "keylocation must be 'none' " 1458 "for unencrypted datasets")); 1459 (void) zfs_error(hdl, EZFS_BADPROP, 1460 errbuf); 1461 goto error; 1462 } else if (crypt != ZIO_CRYPT_OFF && 1463 strcmp(strval, "none") == 0) { 1464 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1465 "keylocation must not be 'none' " 1466 "for encrypted datasets")); 1467 (void) zfs_error(hdl, EZFS_BADPROP, 1468 errbuf); 1469 goto error; 1470 } 1471 } 1472 break; 1473 1474 case ZFS_PROP_PBKDF2_ITERS: 1475 if (intval < MIN_PBKDF2_ITERATIONS) { 1476 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1477 "minimum pbkdf2 iterations is %u"), 1478 MIN_PBKDF2_ITERATIONS); 1479 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1480 goto error; 1481 } 1482 break; 1483 1484 case ZFS_PROP_UTF8ONLY: 1485 chosen_utf = (int)intval; 1486 break; 1487 1488 case ZFS_PROP_NORMALIZE: 1489 chosen_normal = (int)intval; 1490 break; 1491 1492 default: 1493 break; 1494 } 1495 1496 /* 1497 * For changes to existing volumes, we have some additional 1498 * checks to enforce. 1499 */ 1500 if (type == ZFS_TYPE_VOLUME && zhp != NULL) { 1501 uint64_t blocksize = zfs_prop_get_int(zhp, 1502 ZFS_PROP_VOLBLOCKSIZE); 1503 char buf[64]; 1504 1505 switch (prop) { 1506 case ZFS_PROP_VOLSIZE: 1507 if (intval % blocksize != 0) { 1508 zfs_nicebytes(blocksize, buf, 1509 sizeof (buf)); 1510 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1511 "'%s' must be a multiple of " 1512 "volume block size (%s)"), 1513 propname, buf); 1514 (void) zfs_error(hdl, EZFS_BADPROP, 1515 errbuf); 1516 goto error; 1517 } 1518 1519 if (intval == 0) { 1520 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1521 "'%s' cannot be zero"), 1522 propname); 1523 (void) zfs_error(hdl, EZFS_BADPROP, 1524 errbuf); 1525 goto error; 1526 } 1527 break; 1528 1529 default: 1530 break; 1531 } 1532 } 1533 1534 /* check encryption properties */ 1535 if (zhp != NULL) { 1536 int64_t crypt = zfs_prop_get_int(zhp, 1537 ZFS_PROP_ENCRYPTION); 1538 1539 switch (prop) { 1540 case ZFS_PROP_COPIES: 1541 if (crypt != ZIO_CRYPT_OFF && intval > 2) { 1542 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1543 "encrypted datasets cannot have " 1544 "3 copies")); 1545 (void) zfs_error(hdl, EZFS_BADPROP, 1546 errbuf); 1547 goto error; 1548 } 1549 break; 1550 default: 1551 break; 1552 } 1553 } 1554 } 1555 1556 /* 1557 * If normalization was chosen, but no UTF8 choice was made, 1558 * enforce rejection of non-UTF8 names. 1559 * 1560 * If normalization was chosen, but rejecting non-UTF8 names 1561 * was explicitly not chosen, it is an error. 1562 * 1563 * If utf8only was turned off, but the parent has normalization, 1564 * turn off normalization. 1565 */ 1566 if (chosen_normal > 0 && chosen_utf < 0) { 1567 if (nvlist_add_uint64(ret, 1568 zfs_prop_to_name(ZFS_PROP_UTF8ONLY), 1) != 0) { 1569 (void) no_memory(hdl); 1570 goto error; 1571 } 1572 } else if (chosen_normal > 0 && chosen_utf == 0) { 1573 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1574 "'%s' must be set 'on' if normalization chosen"), 1575 zfs_prop_to_name(ZFS_PROP_UTF8ONLY)); 1576 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1577 goto error; 1578 } else if (chosen_normal < 0 && chosen_utf == 0) { 1579 if (nvlist_add_uint64(ret, 1580 zfs_prop_to_name(ZFS_PROP_NORMALIZE), 0) != 0) { 1581 (void) no_memory(hdl); 1582 goto error; 1583 } 1584 } 1585 return (ret); 1586 1587 error: 1588 nvlist_free(ret); 1589 return (NULL); 1590 } 1591 1592 static int 1593 zfs_add_synthetic_resv(zfs_handle_t *zhp, nvlist_t *nvl) 1594 { 1595 uint64_t old_volsize; 1596 uint64_t new_volsize; 1597 uint64_t old_reservation; 1598 uint64_t new_reservation; 1599 zfs_prop_t resv_prop; 1600 nvlist_t *props; 1601 zpool_handle_t *zph = zpool_handle(zhp); 1602 1603 /* 1604 * If this is an existing volume, and someone is setting the volsize, 1605 * make sure that it matches the reservation, or add it if necessary. 1606 */ 1607 old_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE); 1608 if (zfs_which_resv_prop(zhp, &resv_prop) < 0) 1609 return (-1); 1610 old_reservation = zfs_prop_get_int(zhp, resv_prop); 1611 1612 props = fnvlist_alloc(); 1613 fnvlist_add_uint64(props, zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE), 1614 zfs_prop_get_int(zhp, ZFS_PROP_VOLBLOCKSIZE)); 1615 1616 if ((zvol_volsize_to_reservation(zph, old_volsize, props) != 1617 old_reservation) || nvlist_exists(nvl, 1618 zfs_prop_to_name(resv_prop))) { 1619 fnvlist_free(props); 1620 return (0); 1621 } 1622 if (nvlist_lookup_uint64(nvl, zfs_prop_to_name(ZFS_PROP_VOLSIZE), 1623 &new_volsize) != 0) { 1624 fnvlist_free(props); 1625 return (-1); 1626 } 1627 new_reservation = zvol_volsize_to_reservation(zph, new_volsize, props); 1628 fnvlist_free(props); 1629 1630 if (nvlist_add_uint64(nvl, zfs_prop_to_name(resv_prop), 1631 new_reservation) != 0) { 1632 (void) no_memory(zhp->zfs_hdl); 1633 return (-1); 1634 } 1635 return (1); 1636 } 1637 1638 /* 1639 * Helper for 'zfs {set|clone} refreservation=auto'. Must be called after 1640 * zfs_valid_proplist(), as it is what sets the UINT64_MAX sentinel value. 1641 * Return codes must match zfs_add_synthetic_resv(). 1642 */ 1643 static int 1644 zfs_fix_auto_resv(zfs_handle_t *zhp, nvlist_t *nvl) 1645 { 1646 uint64_t volsize; 1647 uint64_t resvsize; 1648 zfs_prop_t prop; 1649 nvlist_t *props; 1650 1651 if (!ZFS_IS_VOLUME(zhp)) { 1652 return (0); 1653 } 1654 1655 if (zfs_which_resv_prop(zhp, &prop) != 0) { 1656 return (-1); 1657 } 1658 1659 if (prop != ZFS_PROP_REFRESERVATION) { 1660 return (0); 1661 } 1662 1663 if (nvlist_lookup_uint64(nvl, zfs_prop_to_name(prop), &resvsize) != 0) { 1664 /* No value being set, so it can't be "auto" */ 1665 return (0); 1666 } 1667 if (resvsize != UINT64_MAX) { 1668 /* Being set to a value other than "auto" */ 1669 return (0); 1670 } 1671 1672 props = fnvlist_alloc(); 1673 1674 fnvlist_add_uint64(props, zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE), 1675 zfs_prop_get_int(zhp, ZFS_PROP_VOLBLOCKSIZE)); 1676 1677 if (nvlist_lookup_uint64(nvl, zfs_prop_to_name(ZFS_PROP_VOLSIZE), 1678 &volsize) != 0) { 1679 volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE); 1680 } 1681 1682 resvsize = zvol_volsize_to_reservation(zpool_handle(zhp), volsize, 1683 props); 1684 fnvlist_free(props); 1685 1686 (void) nvlist_remove_all(nvl, zfs_prop_to_name(prop)); 1687 if (nvlist_add_uint64(nvl, zfs_prop_to_name(prop), resvsize) != 0) { 1688 (void) no_memory(zhp->zfs_hdl); 1689 return (-1); 1690 } 1691 return (1); 1692 } 1693 1694 static boolean_t 1695 zfs_is_namespace_prop(zfs_prop_t prop) 1696 { 1697 switch (prop) { 1698 1699 case ZFS_PROP_ATIME: 1700 case ZFS_PROP_RELATIME: 1701 case ZFS_PROP_DEVICES: 1702 case ZFS_PROP_EXEC: 1703 case ZFS_PROP_SETUID: 1704 case ZFS_PROP_READONLY: 1705 case ZFS_PROP_XATTR: 1706 case ZFS_PROP_NBMAND: 1707 return (B_TRUE); 1708 1709 default: 1710 return (B_FALSE); 1711 } 1712 } 1713 1714 /* 1715 * Given a property name and value, set the property for the given dataset. 1716 */ 1717 int 1718 zfs_prop_set(zfs_handle_t *zhp, const char *propname, const char *propval) 1719 { 1720 int ret = -1; 1721 char errbuf[ERRBUFLEN]; 1722 libzfs_handle_t *hdl = zhp->zfs_hdl; 1723 nvlist_t *nvl = NULL; 1724 1725 (void) snprintf(errbuf, sizeof (errbuf), 1726 dgettext(TEXT_DOMAIN, "cannot set property for '%s'"), 1727 zhp->zfs_name); 1728 1729 if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0 || 1730 nvlist_add_string(nvl, propname, propval) != 0) { 1731 (void) no_memory(hdl); 1732 goto error; 1733 } 1734 1735 ret = zfs_prop_set_list(zhp, nvl); 1736 1737 error: 1738 nvlist_free(nvl); 1739 return (ret); 1740 } 1741 1742 1743 1744 /* 1745 * Given an nvlist of property names and values, set the properties for the 1746 * given dataset. 1747 */ 1748 int 1749 zfs_prop_set_list(zfs_handle_t *zhp, nvlist_t *props) 1750 { 1751 zfs_cmd_t zc = {"\0"}; 1752 int ret = -1; 1753 prop_changelist_t **cls = NULL; 1754 int cl_idx; 1755 char errbuf[ERRBUFLEN]; 1756 libzfs_handle_t *hdl = zhp->zfs_hdl; 1757 nvlist_t *nvl; 1758 int nvl_len = 0; 1759 int added_resv = 0; 1760 zfs_prop_t prop = 0; 1761 nvpair_t *elem; 1762 1763 (void) snprintf(errbuf, sizeof (errbuf), 1764 dgettext(TEXT_DOMAIN, "cannot set property for '%s'"), 1765 zhp->zfs_name); 1766 1767 if ((nvl = zfs_valid_proplist(hdl, zhp->zfs_type, props, 1768 zfs_prop_get_int(zhp, ZFS_PROP_ZONED), zhp, zhp->zpool_hdl, 1769 B_FALSE, errbuf)) == NULL) 1770 goto error; 1771 1772 /* 1773 * We have to check for any extra properties which need to be added 1774 * before computing the length of the nvlist. 1775 */ 1776 for (elem = nvlist_next_nvpair(nvl, NULL); 1777 elem != NULL; 1778 elem = nvlist_next_nvpair(nvl, elem)) { 1779 if (zfs_name_to_prop(nvpair_name(elem)) == ZFS_PROP_VOLSIZE && 1780 (added_resv = zfs_add_synthetic_resv(zhp, nvl)) == -1) { 1781 goto error; 1782 } 1783 } 1784 1785 if (added_resv != 1 && 1786 (added_resv = zfs_fix_auto_resv(zhp, nvl)) == -1) { 1787 goto error; 1788 } 1789 1790 /* 1791 * Check how many properties we're setting and allocate an array to 1792 * store changelist pointers for postfix(). 1793 */ 1794 for (elem = nvlist_next_nvpair(nvl, NULL); 1795 elem != NULL; 1796 elem = nvlist_next_nvpair(nvl, elem)) 1797 nvl_len++; 1798 if ((cls = calloc(nvl_len, sizeof (prop_changelist_t *))) == NULL) 1799 goto error; 1800 1801 cl_idx = 0; 1802 for (elem = nvlist_next_nvpair(nvl, NULL); 1803 elem != NULL; 1804 elem = nvlist_next_nvpair(nvl, elem)) { 1805 1806 prop = zfs_name_to_prop(nvpair_name(elem)); 1807 1808 assert(cl_idx < nvl_len); 1809 /* 1810 * We don't want to unmount & remount the dataset when changing 1811 * its canmount property to 'on' or 'noauto'. We only use 1812 * the changelist logic to unmount when setting canmount=off. 1813 */ 1814 if (prop != ZFS_PROP_CANMOUNT || 1815 (fnvpair_value_uint64(elem) == ZFS_CANMOUNT_OFF && 1816 zfs_is_mounted(zhp, NULL))) { 1817 cls[cl_idx] = changelist_gather(zhp, prop, 0, 0); 1818 if (cls[cl_idx] == NULL) 1819 goto error; 1820 } 1821 1822 if (prop == ZFS_PROP_MOUNTPOINT && 1823 changelist_haszonedchild(cls[cl_idx])) { 1824 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1825 "child dataset with inherited mountpoint is used " 1826 "in a non-global zone")); 1827 ret = zfs_error(hdl, EZFS_ZONED, errbuf); 1828 goto error; 1829 } 1830 1831 if (cls[cl_idx] != NULL && 1832 (ret = changelist_prefix(cls[cl_idx])) != 0) 1833 goto error; 1834 1835 cl_idx++; 1836 } 1837 assert(cl_idx == nvl_len); 1838 1839 /* 1840 * Execute the corresponding ioctl() to set this list of properties. 1841 */ 1842 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 1843 1844 zcmd_write_src_nvlist(hdl, &zc, nvl); 1845 zcmd_alloc_dst_nvlist(hdl, &zc, 0); 1846 1847 ret = zfs_ioctl(hdl, ZFS_IOC_SET_PROP, &zc); 1848 1849 if (ret != 0) { 1850 if (zc.zc_nvlist_dst_filled == B_FALSE) { 1851 (void) zfs_standard_error(hdl, errno, errbuf); 1852 goto error; 1853 } 1854 1855 /* Get the list of unset properties back and report them. */ 1856 nvlist_t *errorprops = NULL; 1857 if (zcmd_read_dst_nvlist(hdl, &zc, &errorprops) != 0) 1858 goto error; 1859 for (nvpair_t *elem = nvlist_next_nvpair(errorprops, NULL); 1860 elem != NULL; 1861 elem = nvlist_next_nvpair(errorprops, elem)) { 1862 prop = zfs_name_to_prop(nvpair_name(elem)); 1863 zfs_setprop_error(hdl, prop, errno, errbuf); 1864 } 1865 nvlist_free(errorprops); 1866 1867 if (added_resv && errno == ENOSPC) { 1868 /* clean up the volsize property we tried to set */ 1869 uint64_t old_volsize = zfs_prop_get_int(zhp, 1870 ZFS_PROP_VOLSIZE); 1871 nvlist_free(nvl); 1872 nvl = NULL; 1873 zcmd_free_nvlists(&zc); 1874 1875 if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0) 1876 goto error; 1877 if (nvlist_add_uint64(nvl, 1878 zfs_prop_to_name(ZFS_PROP_VOLSIZE), 1879 old_volsize) != 0) 1880 goto error; 1881 zcmd_write_src_nvlist(hdl, &zc, nvl); 1882 (void) zfs_ioctl(hdl, ZFS_IOC_SET_PROP, &zc); 1883 } 1884 } else { 1885 for (cl_idx = 0; cl_idx < nvl_len; cl_idx++) { 1886 if (cls[cl_idx] != NULL) { 1887 int clp_err = changelist_postfix(cls[cl_idx]); 1888 if (clp_err != 0) 1889 ret = clp_err; 1890 } 1891 } 1892 1893 if (ret == 0) { 1894 /* 1895 * Refresh the statistics so the new property 1896 * value is reflected. 1897 */ 1898 (void) get_stats(zhp); 1899 1900 /* 1901 * Remount the filesystem to propagate the change 1902 * if one of the options handled by the generic 1903 * Linux namespace layer has been modified. 1904 */ 1905 if (zfs_is_namespace_prop(prop) && 1906 zfs_is_mounted(zhp, NULL)) 1907 ret = zfs_mount(zhp, MNTOPT_REMOUNT, 0); 1908 } 1909 } 1910 1911 error: 1912 nvlist_free(nvl); 1913 zcmd_free_nvlists(&zc); 1914 if (cls != NULL) { 1915 for (cl_idx = 0; cl_idx < nvl_len; cl_idx++) { 1916 if (cls[cl_idx] != NULL) 1917 changelist_free(cls[cl_idx]); 1918 } 1919 free(cls); 1920 } 1921 return (ret); 1922 } 1923 1924 /* 1925 * Given a property, inherit the value from the parent dataset, or if received 1926 * is TRUE, revert to the received value, if any. 1927 */ 1928 int 1929 zfs_prop_inherit(zfs_handle_t *zhp, const char *propname, boolean_t received) 1930 { 1931 zfs_cmd_t zc = {"\0"}; 1932 int ret; 1933 prop_changelist_t *cl; 1934 libzfs_handle_t *hdl = zhp->zfs_hdl; 1935 char errbuf[ERRBUFLEN]; 1936 zfs_prop_t prop; 1937 1938 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 1939 "cannot inherit %s for '%s'"), propname, zhp->zfs_name); 1940 1941 zc.zc_cookie = received; 1942 if ((prop = zfs_name_to_prop(propname)) == ZPROP_USERPROP) { 1943 /* 1944 * For user properties, the amount of work we have to do is very 1945 * small, so just do it here. 1946 */ 1947 if (!zfs_prop_user(propname)) { 1948 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1949 "invalid property")); 1950 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 1951 } 1952 1953 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 1954 (void) strlcpy(zc.zc_value, propname, sizeof (zc.zc_value)); 1955 1956 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_INHERIT_PROP, &zc) != 0) 1957 return (zfs_standard_error(hdl, errno, errbuf)); 1958 1959 (void) get_stats(zhp); 1960 return (0); 1961 } 1962 1963 /* 1964 * Verify that this property is inheritable. 1965 */ 1966 if (zfs_prop_readonly(prop)) 1967 return (zfs_error(hdl, EZFS_PROPREADONLY, errbuf)); 1968 1969 if (!zfs_prop_inheritable(prop) && !received) 1970 return (zfs_error(hdl, EZFS_PROPNONINHERIT, errbuf)); 1971 1972 /* 1973 * Check to see if the value applies to this type 1974 */ 1975 if (!zfs_prop_valid_for_type(prop, zhp->zfs_type, B_FALSE)) 1976 return (zfs_error(hdl, EZFS_PROPTYPE, errbuf)); 1977 1978 /* 1979 * Normalize the name, to get rid of shorthand abbreviations. 1980 */ 1981 propname = zfs_prop_to_name(prop); 1982 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 1983 (void) strlcpy(zc.zc_value, propname, sizeof (zc.zc_value)); 1984 1985 if (prop == ZFS_PROP_MOUNTPOINT && getzoneid() == GLOBAL_ZONEID && 1986 zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) { 1987 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1988 "dataset is used in a non-global zone")); 1989 return (zfs_error(hdl, EZFS_ZONED, errbuf)); 1990 } 1991 1992 /* 1993 * Determine datasets which will be affected by this change, if any. 1994 */ 1995 if ((cl = changelist_gather(zhp, prop, 0, 0)) == NULL) 1996 return (-1); 1997 1998 if (prop == ZFS_PROP_MOUNTPOINT && changelist_haszonedchild(cl)) { 1999 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 2000 "child dataset with inherited mountpoint is used " 2001 "in a non-global zone")); 2002 ret = zfs_error(hdl, EZFS_ZONED, errbuf); 2003 goto error; 2004 } 2005 2006 if ((ret = changelist_prefix(cl)) != 0) 2007 goto error; 2008 2009 if ((ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_INHERIT_PROP, &zc)) != 0) { 2010 changelist_free(cl); 2011 return (zfs_standard_error(hdl, errno, errbuf)); 2012 } else { 2013 2014 if ((ret = changelist_postfix(cl)) != 0) 2015 goto error; 2016 2017 /* 2018 * Refresh the statistics so the new property is reflected. 2019 */ 2020 (void) get_stats(zhp); 2021 2022 /* 2023 * Remount the filesystem to propagate the change 2024 * if one of the options handled by the generic 2025 * Linux namespace layer has been modified. 2026 */ 2027 if (zfs_is_namespace_prop(prop) && 2028 zfs_is_mounted(zhp, NULL)) 2029 ret = zfs_mount(zhp, MNTOPT_REMOUNT, 0); 2030 } 2031 2032 error: 2033 changelist_free(cl); 2034 return (ret); 2035 } 2036 2037 /* 2038 * True DSL properties are stored in an nvlist. The following two functions 2039 * extract them appropriately. 2040 */ 2041 uint64_t 2042 getprop_uint64(zfs_handle_t *zhp, zfs_prop_t prop, char **source) 2043 { 2044 nvlist_t *nv; 2045 uint64_t value; 2046 2047 *source = NULL; 2048 if (nvlist_lookup_nvlist(zhp->zfs_props, 2049 zfs_prop_to_name(prop), &nv) == 0) { 2050 value = fnvlist_lookup_uint64(nv, ZPROP_VALUE); 2051 (void) nvlist_lookup_string(nv, ZPROP_SOURCE, source); 2052 } else { 2053 verify(!zhp->zfs_props_table || 2054 zhp->zfs_props_table[prop] == B_TRUE); 2055 value = zfs_prop_default_numeric(prop); 2056 *source = (char *)""; 2057 } 2058 2059 return (value); 2060 } 2061 2062 static const char * 2063 getprop_string(zfs_handle_t *zhp, zfs_prop_t prop, char **source) 2064 { 2065 nvlist_t *nv; 2066 const char *value; 2067 2068 *source = NULL; 2069 if (nvlist_lookup_nvlist(zhp->zfs_props, 2070 zfs_prop_to_name(prop), &nv) == 0) { 2071 value = fnvlist_lookup_string(nv, ZPROP_VALUE); 2072 (void) nvlist_lookup_string(nv, ZPROP_SOURCE, source); 2073 } else { 2074 verify(!zhp->zfs_props_table || 2075 zhp->zfs_props_table[prop] == B_TRUE); 2076 value = zfs_prop_default_string(prop); 2077 *source = (char *)""; 2078 } 2079 2080 return (value); 2081 } 2082 2083 static boolean_t 2084 zfs_is_recvd_props_mode(zfs_handle_t *zhp) 2085 { 2086 return (zhp->zfs_props == zhp->zfs_recvd_props); 2087 } 2088 2089 static void 2090 zfs_set_recvd_props_mode(zfs_handle_t *zhp, uint64_t *cookie) 2091 { 2092 *cookie = (uint64_t)(uintptr_t)zhp->zfs_props; 2093 zhp->zfs_props = zhp->zfs_recvd_props; 2094 } 2095 2096 static void 2097 zfs_unset_recvd_props_mode(zfs_handle_t *zhp, uint64_t *cookie) 2098 { 2099 zhp->zfs_props = (nvlist_t *)(uintptr_t)*cookie; 2100 *cookie = 0; 2101 } 2102 2103 /* 2104 * Internal function for getting a numeric property. Both zfs_prop_get() and 2105 * zfs_prop_get_int() are built using this interface. 2106 * 2107 * Certain properties can be overridden using 'mount -o'. In this case, scan 2108 * the contents of the /proc/self/mounts entry, searching for the 2109 * appropriate options. If they differ from the on-disk values, report the 2110 * current values and mark the source "temporary". 2111 */ 2112 static int 2113 get_numeric_property(zfs_handle_t *zhp, zfs_prop_t prop, zprop_source_t *src, 2114 char **source, uint64_t *val) 2115 { 2116 zfs_cmd_t zc = {"\0"}; 2117 nvlist_t *zplprops = NULL; 2118 struct mnttab mnt; 2119 const char *mntopt_on = NULL; 2120 const char *mntopt_off = NULL; 2121 boolean_t received = zfs_is_recvd_props_mode(zhp); 2122 2123 *source = NULL; 2124 2125 /* 2126 * If the property is being fetched for a snapshot, check whether 2127 * the property is valid for the snapshot's head dataset type. 2128 */ 2129 if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT && 2130 !zfs_prop_valid_for_type(prop, zhp->zfs_head_type, B_TRUE)) { 2131 *val = zfs_prop_default_numeric(prop); 2132 return (-1); 2133 } 2134 2135 switch (prop) { 2136 case ZFS_PROP_ATIME: 2137 mntopt_on = MNTOPT_ATIME; 2138 mntopt_off = MNTOPT_NOATIME; 2139 break; 2140 2141 case ZFS_PROP_RELATIME: 2142 mntopt_on = MNTOPT_RELATIME; 2143 mntopt_off = MNTOPT_NORELATIME; 2144 break; 2145 2146 case ZFS_PROP_DEVICES: 2147 mntopt_on = MNTOPT_DEVICES; 2148 mntopt_off = MNTOPT_NODEVICES; 2149 break; 2150 2151 case ZFS_PROP_EXEC: 2152 mntopt_on = MNTOPT_EXEC; 2153 mntopt_off = MNTOPT_NOEXEC; 2154 break; 2155 2156 case ZFS_PROP_READONLY: 2157 mntopt_on = MNTOPT_RO; 2158 mntopt_off = MNTOPT_RW; 2159 break; 2160 2161 case ZFS_PROP_SETUID: 2162 mntopt_on = MNTOPT_SETUID; 2163 mntopt_off = MNTOPT_NOSETUID; 2164 break; 2165 2166 case ZFS_PROP_XATTR: 2167 mntopt_on = MNTOPT_XATTR; 2168 mntopt_off = MNTOPT_NOXATTR; 2169 break; 2170 2171 case ZFS_PROP_NBMAND: 2172 mntopt_on = MNTOPT_NBMAND; 2173 mntopt_off = MNTOPT_NONBMAND; 2174 break; 2175 2176 default: 2177 break; 2178 } 2179 2180 /* 2181 * Because looking up the mount options is potentially expensive 2182 * (iterating over all of /proc/self/mounts), we defer its 2183 * calculation until we're looking up a property which requires 2184 * its presence. 2185 */ 2186 if (!zhp->zfs_mntcheck && 2187 (mntopt_on != NULL || prop == ZFS_PROP_MOUNTED)) { 2188 libzfs_handle_t *hdl = zhp->zfs_hdl; 2189 struct mnttab entry; 2190 2191 if (libzfs_mnttab_find(hdl, zhp->zfs_name, &entry) == 0) 2192 zhp->zfs_mntopts = zfs_strdup(hdl, 2193 entry.mnt_mntopts); 2194 2195 zhp->zfs_mntcheck = B_TRUE; 2196 } 2197 2198 if (zhp->zfs_mntopts == NULL) 2199 mnt.mnt_mntopts = (char *)""; 2200 else 2201 mnt.mnt_mntopts = zhp->zfs_mntopts; 2202 2203 switch (prop) { 2204 case ZFS_PROP_ATIME: 2205 case ZFS_PROP_RELATIME: 2206 case ZFS_PROP_DEVICES: 2207 case ZFS_PROP_EXEC: 2208 case ZFS_PROP_READONLY: 2209 case ZFS_PROP_SETUID: 2210 #ifndef __FreeBSD__ 2211 case ZFS_PROP_XATTR: 2212 #endif 2213 case ZFS_PROP_NBMAND: 2214 *val = getprop_uint64(zhp, prop, source); 2215 2216 if (received) 2217 break; 2218 2219 if (hasmntopt(&mnt, mntopt_on) && !*val) { 2220 *val = B_TRUE; 2221 if (src) 2222 *src = ZPROP_SRC_TEMPORARY; 2223 } else if (hasmntopt(&mnt, mntopt_off) && *val) { 2224 *val = B_FALSE; 2225 if (src) 2226 *src = ZPROP_SRC_TEMPORARY; 2227 } 2228 break; 2229 2230 case ZFS_PROP_CANMOUNT: 2231 case ZFS_PROP_VOLSIZE: 2232 case ZFS_PROP_QUOTA: 2233 case ZFS_PROP_REFQUOTA: 2234 case ZFS_PROP_RESERVATION: 2235 case ZFS_PROP_REFRESERVATION: 2236 case ZFS_PROP_FILESYSTEM_LIMIT: 2237 case ZFS_PROP_SNAPSHOT_LIMIT: 2238 case ZFS_PROP_FILESYSTEM_COUNT: 2239 case ZFS_PROP_SNAPSHOT_COUNT: 2240 *val = getprop_uint64(zhp, prop, source); 2241 2242 if (*source == NULL) { 2243 /* not default, must be local */ 2244 *source = zhp->zfs_name; 2245 } 2246 break; 2247 2248 case ZFS_PROP_MOUNTED: 2249 *val = (zhp->zfs_mntopts != NULL); 2250 break; 2251 2252 case ZFS_PROP_NUMCLONES: 2253 *val = zhp->zfs_dmustats.dds_num_clones; 2254 break; 2255 2256 case ZFS_PROP_VERSION: 2257 case ZFS_PROP_NORMALIZE: 2258 case ZFS_PROP_UTF8ONLY: 2259 case ZFS_PROP_CASE: 2260 zcmd_alloc_dst_nvlist(zhp->zfs_hdl, &zc, 0); 2261 2262 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 2263 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_OBJSET_ZPLPROPS, &zc)) { 2264 zcmd_free_nvlists(&zc); 2265 if (prop == ZFS_PROP_VERSION && 2266 zhp->zfs_type == ZFS_TYPE_VOLUME) 2267 *val = zfs_prop_default_numeric(prop); 2268 return (-1); 2269 } 2270 if (zcmd_read_dst_nvlist(zhp->zfs_hdl, &zc, &zplprops) != 0 || 2271 nvlist_lookup_uint64(zplprops, zfs_prop_to_name(prop), 2272 val) != 0) { 2273 zcmd_free_nvlists(&zc); 2274 return (-1); 2275 } 2276 nvlist_free(zplprops); 2277 zcmd_free_nvlists(&zc); 2278 break; 2279 2280 case ZFS_PROP_INCONSISTENT: 2281 *val = zhp->zfs_dmustats.dds_inconsistent; 2282 break; 2283 2284 case ZFS_PROP_REDACTED: 2285 *val = zhp->zfs_dmustats.dds_redacted; 2286 break; 2287 2288 case ZFS_PROP_CREATETXG: 2289 /* 2290 * We can directly read createtxg property from zfs 2291 * handle for Filesystem, Snapshot and ZVOL types. 2292 */ 2293 if ((zhp->zfs_type == ZFS_TYPE_FILESYSTEM) || 2294 (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) || 2295 (zhp->zfs_type == ZFS_TYPE_VOLUME)) { 2296 *val = zhp->zfs_dmustats.dds_creation_txg; 2297 break; 2298 } 2299 zfs_fallthrough; 2300 2301 default: 2302 switch (zfs_prop_get_type(prop)) { 2303 case PROP_TYPE_NUMBER: 2304 case PROP_TYPE_INDEX: 2305 *val = getprop_uint64(zhp, prop, source); 2306 /* 2307 * If we tried to use a default value for a 2308 * readonly property, it means that it was not 2309 * present. Note this only applies to "truly" 2310 * readonly properties, not set-once properties 2311 * like volblocksize. 2312 */ 2313 if (zfs_prop_readonly(prop) && 2314 !zfs_prop_setonce(prop) && 2315 *source != NULL && (*source)[0] == '\0') { 2316 *source = NULL; 2317 return (-1); 2318 } 2319 break; 2320 2321 case PROP_TYPE_STRING: 2322 default: 2323 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN, 2324 "cannot get non-numeric property")); 2325 return (zfs_error(zhp->zfs_hdl, EZFS_BADPROP, 2326 dgettext(TEXT_DOMAIN, "internal error"))); 2327 } 2328 } 2329 2330 return (0); 2331 } 2332 2333 /* 2334 * Calculate the source type, given the raw source string. 2335 */ 2336 static void 2337 get_source(zfs_handle_t *zhp, zprop_source_t *srctype, char *source, 2338 char *statbuf, size_t statlen) 2339 { 2340 if (statbuf == NULL || 2341 srctype == NULL || *srctype == ZPROP_SRC_TEMPORARY) { 2342 return; 2343 } 2344 2345 if (source == NULL) { 2346 *srctype = ZPROP_SRC_NONE; 2347 } else if (source[0] == '\0') { 2348 *srctype = ZPROP_SRC_DEFAULT; 2349 } else if (strstr(source, ZPROP_SOURCE_VAL_RECVD) != NULL) { 2350 *srctype = ZPROP_SRC_RECEIVED; 2351 } else { 2352 if (strcmp(source, zhp->zfs_name) == 0) { 2353 *srctype = ZPROP_SRC_LOCAL; 2354 } else { 2355 (void) strlcpy(statbuf, source, statlen); 2356 *srctype = ZPROP_SRC_INHERITED; 2357 } 2358 } 2359 2360 } 2361 2362 int 2363 zfs_prop_get_recvd(zfs_handle_t *zhp, const char *propname, char *propbuf, 2364 size_t proplen, boolean_t literal) 2365 { 2366 zfs_prop_t prop; 2367 int err = 0; 2368 2369 if (zhp->zfs_recvd_props == NULL) 2370 if (get_recvd_props_ioctl(zhp) != 0) 2371 return (-1); 2372 2373 prop = zfs_name_to_prop(propname); 2374 2375 if (prop != ZPROP_USERPROP) { 2376 uint64_t cookie; 2377 if (!nvlist_exists(zhp->zfs_recvd_props, propname)) 2378 return (-1); 2379 zfs_set_recvd_props_mode(zhp, &cookie); 2380 err = zfs_prop_get(zhp, prop, propbuf, proplen, 2381 NULL, NULL, 0, literal); 2382 zfs_unset_recvd_props_mode(zhp, &cookie); 2383 } else { 2384 nvlist_t *propval; 2385 char *recvdval; 2386 if (nvlist_lookup_nvlist(zhp->zfs_recvd_props, 2387 propname, &propval) != 0) 2388 return (-1); 2389 recvdval = fnvlist_lookup_string(propval, ZPROP_VALUE); 2390 (void) strlcpy(propbuf, recvdval, proplen); 2391 } 2392 2393 return (err == 0 ? 0 : -1); 2394 } 2395 2396 static int 2397 get_clones_string(zfs_handle_t *zhp, char *propbuf, size_t proplen) 2398 { 2399 nvlist_t *value; 2400 nvpair_t *pair; 2401 2402 value = zfs_get_clones_nvl(zhp); 2403 if (value == NULL || nvlist_empty(value)) 2404 return (-1); 2405 2406 propbuf[0] = '\0'; 2407 for (pair = nvlist_next_nvpair(value, NULL); pair != NULL; 2408 pair = nvlist_next_nvpair(value, pair)) { 2409 if (propbuf[0] != '\0') 2410 (void) strlcat(propbuf, ",", proplen); 2411 (void) strlcat(propbuf, nvpair_name(pair), proplen); 2412 } 2413 2414 return (0); 2415 } 2416 2417 struct get_clones_arg { 2418 uint64_t numclones; 2419 nvlist_t *value; 2420 const char *origin; 2421 char buf[ZFS_MAX_DATASET_NAME_LEN]; 2422 }; 2423 2424 static int 2425 get_clones_cb(zfs_handle_t *zhp, void *arg) 2426 { 2427 struct get_clones_arg *gca = arg; 2428 2429 if (gca->numclones == 0) { 2430 zfs_close(zhp); 2431 return (0); 2432 } 2433 2434 if (zfs_prop_get(zhp, ZFS_PROP_ORIGIN, gca->buf, sizeof (gca->buf), 2435 NULL, NULL, 0, B_TRUE) != 0) 2436 goto out; 2437 if (strcmp(gca->buf, gca->origin) == 0) { 2438 fnvlist_add_boolean(gca->value, zfs_get_name(zhp)); 2439 gca->numclones--; 2440 } 2441 2442 out: 2443 (void) zfs_iter_children(zhp, get_clones_cb, gca); 2444 zfs_close(zhp); 2445 return (0); 2446 } 2447 2448 nvlist_t * 2449 zfs_get_clones_nvl(zfs_handle_t *zhp) 2450 { 2451 nvlist_t *nv, *value; 2452 2453 if (nvlist_lookup_nvlist(zhp->zfs_props, 2454 zfs_prop_to_name(ZFS_PROP_CLONES), &nv) != 0) { 2455 struct get_clones_arg gca; 2456 2457 /* 2458 * if this is a snapshot, then the kernel wasn't able 2459 * to get the clones. Do it by slowly iterating. 2460 */ 2461 if (zhp->zfs_type != ZFS_TYPE_SNAPSHOT) 2462 return (NULL); 2463 if (nvlist_alloc(&nv, NV_UNIQUE_NAME, 0) != 0) 2464 return (NULL); 2465 if (nvlist_alloc(&value, NV_UNIQUE_NAME, 0) != 0) { 2466 nvlist_free(nv); 2467 return (NULL); 2468 } 2469 2470 gca.numclones = zfs_prop_get_int(zhp, ZFS_PROP_NUMCLONES); 2471 gca.value = value; 2472 gca.origin = zhp->zfs_name; 2473 2474 if (gca.numclones != 0) { 2475 zfs_handle_t *root; 2476 char pool[ZFS_MAX_DATASET_NAME_LEN]; 2477 char *cp = pool; 2478 2479 /* get the pool name */ 2480 (void) strlcpy(pool, zhp->zfs_name, sizeof (pool)); 2481 (void) strsep(&cp, "/@"); 2482 root = zfs_open(zhp->zfs_hdl, pool, 2483 ZFS_TYPE_FILESYSTEM); 2484 if (root == NULL) { 2485 nvlist_free(nv); 2486 nvlist_free(value); 2487 return (NULL); 2488 } 2489 2490 (void) get_clones_cb(root, &gca); 2491 } 2492 2493 if (gca.numclones != 0 || 2494 nvlist_add_nvlist(nv, ZPROP_VALUE, value) != 0 || 2495 nvlist_add_nvlist(zhp->zfs_props, 2496 zfs_prop_to_name(ZFS_PROP_CLONES), nv) != 0) { 2497 nvlist_free(nv); 2498 nvlist_free(value); 2499 return (NULL); 2500 } 2501 nvlist_free(nv); 2502 nvlist_free(value); 2503 nv = fnvlist_lookup_nvlist(zhp->zfs_props, 2504 zfs_prop_to_name(ZFS_PROP_CLONES)); 2505 } 2506 2507 return (fnvlist_lookup_nvlist(nv, ZPROP_VALUE)); 2508 } 2509 2510 static int 2511 get_rsnaps_string(zfs_handle_t *zhp, char *propbuf, size_t proplen) 2512 { 2513 nvlist_t *value; 2514 uint64_t *snaps; 2515 uint_t nsnaps; 2516 2517 if (nvlist_lookup_nvlist(zhp->zfs_props, 2518 zfs_prop_to_name(ZFS_PROP_REDACT_SNAPS), &value) != 0) 2519 return (-1); 2520 if (nvlist_lookup_uint64_array(value, ZPROP_VALUE, &snaps, 2521 &nsnaps) != 0) 2522 return (-1); 2523 if (nsnaps == 0) { 2524 /* There's no redaction snapshots; pass a special value back */ 2525 (void) snprintf(propbuf, proplen, "none"); 2526 return (0); 2527 } 2528 propbuf[0] = '\0'; 2529 for (int i = 0; i < nsnaps; i++) { 2530 char buf[128]; 2531 if (propbuf[0] != '\0') 2532 (void) strlcat(propbuf, ",", proplen); 2533 (void) snprintf(buf, sizeof (buf), "%llu", 2534 (u_longlong_t)snaps[i]); 2535 (void) strlcat(propbuf, buf, proplen); 2536 } 2537 2538 return (0); 2539 } 2540 2541 /* 2542 * Accepts a property and value and checks that the value 2543 * matches the one found by the channel program. If they are 2544 * not equal, print both of them. 2545 */ 2546 static void 2547 zcp_check(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t intval, 2548 const char *strval) 2549 { 2550 if (!zhp->zfs_hdl->libzfs_prop_debug) 2551 return; 2552 int error; 2553 char *poolname = zhp->zpool_hdl->zpool_name; 2554 const char *prop_name = zfs_prop_to_name(prop); 2555 const char *program = 2556 "args = ...\n" 2557 "ds = args['dataset']\n" 2558 "prop = args['property']\n" 2559 "value, setpoint = zfs.get_prop(ds, prop)\n" 2560 "return {value=value, setpoint=setpoint}\n"; 2561 nvlist_t *outnvl; 2562 nvlist_t *retnvl; 2563 nvlist_t *argnvl = fnvlist_alloc(); 2564 2565 fnvlist_add_string(argnvl, "dataset", zhp->zfs_name); 2566 fnvlist_add_string(argnvl, "property", zfs_prop_to_name(prop)); 2567 2568 error = lzc_channel_program_nosync(poolname, program, 2569 10 * 1000 * 1000, 10 * 1024 * 1024, argnvl, &outnvl); 2570 2571 if (error == 0) { 2572 retnvl = fnvlist_lookup_nvlist(outnvl, "return"); 2573 if (zfs_prop_get_type(prop) == PROP_TYPE_NUMBER) { 2574 int64_t ans; 2575 error = nvlist_lookup_int64(retnvl, "value", &ans); 2576 if (error != 0) { 2577 (void) fprintf(stderr, "%s: zcp check error: " 2578 "%u\n", prop_name, error); 2579 return; 2580 } 2581 if (ans != intval) { 2582 (void) fprintf(stderr, "%s: zfs found %llu, " 2583 "but zcp found %llu\n", prop_name, 2584 (u_longlong_t)intval, (u_longlong_t)ans); 2585 } 2586 } else { 2587 char *str_ans; 2588 error = nvlist_lookup_string(retnvl, "value", &str_ans); 2589 if (error != 0) { 2590 (void) fprintf(stderr, "%s: zcp check error: " 2591 "%u\n", prop_name, error); 2592 return; 2593 } 2594 if (strcmp(strval, str_ans) != 0) { 2595 (void) fprintf(stderr, 2596 "%s: zfs found '%s', but zcp found '%s'\n", 2597 prop_name, strval, str_ans); 2598 } 2599 } 2600 } else { 2601 (void) fprintf(stderr, "%s: zcp check failed, channel program " 2602 "error: %u\n", prop_name, error); 2603 } 2604 nvlist_free(argnvl); 2605 nvlist_free(outnvl); 2606 } 2607 2608 /* 2609 * Retrieve a property from the given object. If 'literal' is specified, then 2610 * numbers are left as exact values. Otherwise, numbers are converted to a 2611 * human-readable form. 2612 * 2613 * Returns 0 on success, or -1 on error. 2614 */ 2615 int 2616 zfs_prop_get(zfs_handle_t *zhp, zfs_prop_t prop, char *propbuf, size_t proplen, 2617 zprop_source_t *src, char *statbuf, size_t statlen, boolean_t literal) 2618 { 2619 char *source = NULL; 2620 uint64_t val; 2621 const char *str; 2622 const char *strval; 2623 boolean_t received = zfs_is_recvd_props_mode(zhp); 2624 2625 /* 2626 * Check to see if this property applies to our object 2627 */ 2628 if (!zfs_prop_valid_for_type(prop, zhp->zfs_type, B_FALSE)) 2629 return (-1); 2630 2631 if (received && zfs_prop_readonly(prop)) 2632 return (-1); 2633 2634 if (src) 2635 *src = ZPROP_SRC_NONE; 2636 2637 switch (prop) { 2638 case ZFS_PROP_CREATION: 2639 /* 2640 * 'creation' is a time_t stored in the statistics. We convert 2641 * this into a string unless 'literal' is specified. 2642 */ 2643 { 2644 val = getprop_uint64(zhp, prop, &source); 2645 time_t time = (time_t)val; 2646 struct tm t; 2647 2648 if (literal || 2649 localtime_r(&time, &t) == NULL || 2650 strftime(propbuf, proplen, "%a %b %e %k:%M %Y", 2651 &t) == 0) 2652 (void) snprintf(propbuf, proplen, "%llu", 2653 (u_longlong_t)val); 2654 } 2655 zcp_check(zhp, prop, val, NULL); 2656 break; 2657 2658 case ZFS_PROP_MOUNTPOINT: 2659 /* 2660 * Getting the precise mountpoint can be tricky. 2661 * 2662 * - for 'none' or 'legacy', return those values. 2663 * - for inherited mountpoints, we want to take everything 2664 * after our ancestor and append it to the inherited value. 2665 * 2666 * If the pool has an alternate root, we want to prepend that 2667 * root to any values we return. 2668 */ 2669 2670 str = getprop_string(zhp, prop, &source); 2671 2672 if (str[0] == '/') { 2673 char buf[MAXPATHLEN]; 2674 char *root = buf; 2675 const char *relpath; 2676 2677 /* 2678 * If we inherit the mountpoint, even from a dataset 2679 * with a received value, the source will be the path of 2680 * the dataset we inherit from. If source is 2681 * ZPROP_SOURCE_VAL_RECVD, the received value is not 2682 * inherited. 2683 */ 2684 if (strcmp(source, ZPROP_SOURCE_VAL_RECVD) == 0) { 2685 relpath = ""; 2686 } else { 2687 relpath = zhp->zfs_name + strlen(source); 2688 if (relpath[0] == '/') 2689 relpath++; 2690 } 2691 2692 if ((zpool_get_prop(zhp->zpool_hdl, 2693 ZPOOL_PROP_ALTROOT, buf, MAXPATHLEN, NULL, 2694 B_FALSE)) || (strcmp(root, "-") == 0)) 2695 root[0] = '\0'; 2696 /* 2697 * Special case an alternate root of '/'. This will 2698 * avoid having multiple leading slashes in the 2699 * mountpoint path. 2700 */ 2701 if (strcmp(root, "/") == 0) 2702 root++; 2703 2704 /* 2705 * If the mountpoint is '/' then skip over this 2706 * if we are obtaining either an alternate root or 2707 * an inherited mountpoint. 2708 */ 2709 if (str[1] == '\0' && (root[0] != '\0' || 2710 relpath[0] != '\0')) 2711 str++; 2712 2713 if (relpath[0] == '\0') 2714 (void) snprintf(propbuf, proplen, "%s%s", 2715 root, str); 2716 else 2717 (void) snprintf(propbuf, proplen, "%s%s%s%s", 2718 root, str, relpath[0] == '@' ? "" : "/", 2719 relpath); 2720 } else { 2721 /* 'legacy' or 'none' */ 2722 (void) strlcpy(propbuf, str, proplen); 2723 } 2724 zcp_check(zhp, prop, 0, propbuf); 2725 break; 2726 2727 case ZFS_PROP_ORIGIN: 2728 str = getprop_string(zhp, prop, &source); 2729 if (str == NULL) 2730 return (-1); 2731 (void) strlcpy(propbuf, str, proplen); 2732 zcp_check(zhp, prop, 0, str); 2733 break; 2734 2735 case ZFS_PROP_REDACT_SNAPS: 2736 if (get_rsnaps_string(zhp, propbuf, proplen) != 0) 2737 return (-1); 2738 break; 2739 2740 case ZFS_PROP_CLONES: 2741 if (get_clones_string(zhp, propbuf, proplen) != 0) 2742 return (-1); 2743 break; 2744 2745 case ZFS_PROP_QUOTA: 2746 case ZFS_PROP_REFQUOTA: 2747 case ZFS_PROP_RESERVATION: 2748 case ZFS_PROP_REFRESERVATION: 2749 2750 if (get_numeric_property(zhp, prop, src, &source, &val) != 0) 2751 return (-1); 2752 /* 2753 * If quota or reservation is 0, we translate this into 'none' 2754 * (unless literal is set), and indicate that it's the default 2755 * value. Otherwise, we print the number nicely and indicate 2756 * that its set locally. 2757 */ 2758 if (val == 0) { 2759 if (literal) 2760 (void) strlcpy(propbuf, "0", proplen); 2761 else 2762 (void) strlcpy(propbuf, "none", proplen); 2763 } else { 2764 if (literal) 2765 (void) snprintf(propbuf, proplen, "%llu", 2766 (u_longlong_t)val); 2767 else 2768 zfs_nicebytes(val, propbuf, proplen); 2769 } 2770 zcp_check(zhp, prop, val, NULL); 2771 break; 2772 2773 case ZFS_PROP_FILESYSTEM_LIMIT: 2774 case ZFS_PROP_SNAPSHOT_LIMIT: 2775 case ZFS_PROP_FILESYSTEM_COUNT: 2776 case ZFS_PROP_SNAPSHOT_COUNT: 2777 2778 if (get_numeric_property(zhp, prop, src, &source, &val) != 0) 2779 return (-1); 2780 2781 /* 2782 * If limit is UINT64_MAX, we translate this into 'none', and 2783 * indicate that it's the default value. Otherwise, we print 2784 * the number nicely and indicate that it's set locally. 2785 */ 2786 if (val == UINT64_MAX) { 2787 (void) strlcpy(propbuf, "none", proplen); 2788 } else if (literal) { 2789 (void) snprintf(propbuf, proplen, "%llu", 2790 (u_longlong_t)val); 2791 } else { 2792 zfs_nicenum(val, propbuf, proplen); 2793 } 2794 2795 zcp_check(zhp, prop, val, NULL); 2796 break; 2797 2798 case ZFS_PROP_REFRATIO: 2799 case ZFS_PROP_COMPRESSRATIO: 2800 if (get_numeric_property(zhp, prop, src, &source, &val) != 0) 2801 return (-1); 2802 if (literal) 2803 (void) snprintf(propbuf, proplen, "%llu.%02llu", 2804 (u_longlong_t)(val / 100), 2805 (u_longlong_t)(val % 100)); 2806 else 2807 (void) snprintf(propbuf, proplen, "%llu.%02llux", 2808 (u_longlong_t)(val / 100), 2809 (u_longlong_t)(val % 100)); 2810 zcp_check(zhp, prop, val, NULL); 2811 break; 2812 2813 case ZFS_PROP_TYPE: 2814 switch (zhp->zfs_type) { 2815 case ZFS_TYPE_FILESYSTEM: 2816 str = "filesystem"; 2817 break; 2818 case ZFS_TYPE_VOLUME: 2819 str = "volume"; 2820 break; 2821 case ZFS_TYPE_SNAPSHOT: 2822 str = "snapshot"; 2823 break; 2824 case ZFS_TYPE_BOOKMARK: 2825 str = "bookmark"; 2826 break; 2827 default: 2828 abort(); 2829 } 2830 (void) snprintf(propbuf, proplen, "%s", str); 2831 zcp_check(zhp, prop, 0, propbuf); 2832 break; 2833 2834 case ZFS_PROP_MOUNTED: 2835 /* 2836 * The 'mounted' property is a pseudo-property that described 2837 * whether the filesystem is currently mounted. Even though 2838 * it's a boolean value, the typical values of "on" and "off" 2839 * don't make sense, so we translate to "yes" and "no". 2840 */ 2841 if (get_numeric_property(zhp, ZFS_PROP_MOUNTED, 2842 src, &source, &val) != 0) 2843 return (-1); 2844 if (val) 2845 (void) strlcpy(propbuf, "yes", proplen); 2846 else 2847 (void) strlcpy(propbuf, "no", proplen); 2848 break; 2849 2850 case ZFS_PROP_NAME: 2851 /* 2852 * The 'name' property is a pseudo-property derived from the 2853 * dataset name. It is presented as a real property to simplify 2854 * consumers. 2855 */ 2856 (void) strlcpy(propbuf, zhp->zfs_name, proplen); 2857 zcp_check(zhp, prop, 0, propbuf); 2858 break; 2859 2860 case ZFS_PROP_MLSLABEL: 2861 { 2862 #ifdef HAVE_MLSLABEL 2863 m_label_t *new_sl = NULL; 2864 char *ascii = NULL; /* human readable label */ 2865 2866 (void) strlcpy(propbuf, 2867 getprop_string(zhp, prop, &source), proplen); 2868 2869 if (literal || (strcasecmp(propbuf, 2870 ZFS_MLSLABEL_DEFAULT) == 0)) 2871 break; 2872 2873 /* 2874 * Try to translate the internal hex string to 2875 * human-readable output. If there are any 2876 * problems just use the hex string. 2877 */ 2878 2879 if (str_to_label(propbuf, &new_sl, MAC_LABEL, 2880 L_NO_CORRECTION, NULL) == -1) { 2881 m_label_free(new_sl); 2882 break; 2883 } 2884 2885 if (label_to_str(new_sl, &ascii, M_LABEL, 2886 DEF_NAMES) != 0) { 2887 if (ascii) 2888 free(ascii); 2889 m_label_free(new_sl); 2890 break; 2891 } 2892 m_label_free(new_sl); 2893 2894 (void) strlcpy(propbuf, ascii, proplen); 2895 free(ascii); 2896 #else 2897 (void) strlcpy(propbuf, 2898 getprop_string(zhp, prop, &source), proplen); 2899 #endif /* HAVE_MLSLABEL */ 2900 } 2901 break; 2902 2903 case ZFS_PROP_GUID: 2904 case ZFS_PROP_KEY_GUID: 2905 case ZFS_PROP_IVSET_GUID: 2906 case ZFS_PROP_CREATETXG: 2907 case ZFS_PROP_OBJSETID: 2908 case ZFS_PROP_PBKDF2_ITERS: 2909 /* 2910 * These properties are stored as numbers, but they are 2911 * identifiers or counters. 2912 * We don't want them to be pretty printed, because pretty 2913 * printing truncates their values making them useless. 2914 */ 2915 if (get_numeric_property(zhp, prop, src, &source, &val) != 0) 2916 return (-1); 2917 (void) snprintf(propbuf, proplen, "%llu", (u_longlong_t)val); 2918 zcp_check(zhp, prop, val, NULL); 2919 break; 2920 2921 case ZFS_PROP_REFERENCED: 2922 case ZFS_PROP_AVAILABLE: 2923 case ZFS_PROP_USED: 2924 case ZFS_PROP_USEDSNAP: 2925 case ZFS_PROP_USEDDS: 2926 case ZFS_PROP_USEDREFRESERV: 2927 case ZFS_PROP_USEDCHILD: 2928 if (get_numeric_property(zhp, prop, src, &source, &val) != 0) 2929 return (-1); 2930 if (literal) { 2931 (void) snprintf(propbuf, proplen, "%llu", 2932 (u_longlong_t)val); 2933 } else { 2934 zfs_nicebytes(val, propbuf, proplen); 2935 } 2936 zcp_check(zhp, prop, val, NULL); 2937 break; 2938 2939 case ZFS_PROP_SNAPSHOTS_CHANGED: 2940 { 2941 if ((get_numeric_property(zhp, prop, src, &source, 2942 &val) != 0) || val == 0) { 2943 return (-1); 2944 } 2945 2946 time_t time = (time_t)val; 2947 struct tm t; 2948 2949 if (literal || 2950 localtime_r(&time, &t) == NULL || 2951 strftime(propbuf, proplen, "%a %b %e %k:%M:%S %Y", 2952 &t) == 0) 2953 (void) snprintf(propbuf, proplen, "%llu", 2954 (u_longlong_t)val); 2955 } 2956 zcp_check(zhp, prop, val, NULL); 2957 break; 2958 2959 default: 2960 switch (zfs_prop_get_type(prop)) { 2961 case PROP_TYPE_NUMBER: 2962 if (get_numeric_property(zhp, prop, src, 2963 &source, &val) != 0) { 2964 return (-1); 2965 } 2966 2967 if (literal) { 2968 (void) snprintf(propbuf, proplen, "%llu", 2969 (u_longlong_t)val); 2970 } else { 2971 zfs_nicenum(val, propbuf, proplen); 2972 } 2973 zcp_check(zhp, prop, val, NULL); 2974 break; 2975 2976 case PROP_TYPE_STRING: 2977 str = getprop_string(zhp, prop, &source); 2978 if (str == NULL) 2979 return (-1); 2980 2981 (void) strlcpy(propbuf, str, proplen); 2982 zcp_check(zhp, prop, 0, str); 2983 break; 2984 2985 case PROP_TYPE_INDEX: 2986 if (get_numeric_property(zhp, prop, src, 2987 &source, &val) != 0) 2988 return (-1); 2989 if (zfs_prop_index_to_string(prop, val, &strval) != 0) 2990 return (-1); 2991 2992 (void) strlcpy(propbuf, strval, proplen); 2993 zcp_check(zhp, prop, 0, strval); 2994 break; 2995 2996 default: 2997 abort(); 2998 } 2999 } 3000 3001 get_source(zhp, src, source, statbuf, statlen); 3002 3003 return (0); 3004 } 3005 3006 /* 3007 * Utility function to get the given numeric property. Does no validation that 3008 * the given property is the appropriate type; should only be used with 3009 * hard-coded property types. 3010 */ 3011 uint64_t 3012 zfs_prop_get_int(zfs_handle_t *zhp, zfs_prop_t prop) 3013 { 3014 char *source; 3015 uint64_t val = 0; 3016 3017 (void) get_numeric_property(zhp, prop, NULL, &source, &val); 3018 3019 return (val); 3020 } 3021 3022 static int 3023 zfs_prop_set_int(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t val) 3024 { 3025 char buf[64]; 3026 3027 (void) snprintf(buf, sizeof (buf), "%llu", (longlong_t)val); 3028 return (zfs_prop_set(zhp, zfs_prop_to_name(prop), buf)); 3029 } 3030 3031 /* 3032 * Similar to zfs_prop_get(), but returns the value as an integer. 3033 */ 3034 int 3035 zfs_prop_get_numeric(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t *value, 3036 zprop_source_t *src, char *statbuf, size_t statlen) 3037 { 3038 char *source; 3039 3040 /* 3041 * Check to see if this property applies to our object 3042 */ 3043 if (!zfs_prop_valid_for_type(prop, zhp->zfs_type, B_FALSE)) { 3044 return (zfs_error_fmt(zhp->zfs_hdl, EZFS_PROPTYPE, 3045 dgettext(TEXT_DOMAIN, "cannot get property '%s'"), 3046 zfs_prop_to_name(prop))); 3047 } 3048 3049 if (src) 3050 *src = ZPROP_SRC_NONE; 3051 3052 if (get_numeric_property(zhp, prop, src, &source, value) != 0) 3053 return (-1); 3054 3055 get_source(zhp, src, source, statbuf, statlen); 3056 3057 return (0); 3058 } 3059 3060 #ifdef HAVE_IDMAP 3061 static int 3062 idmap_id_to_numeric_domain_rid(uid_t id, boolean_t isuser, 3063 char **domainp, idmap_rid_t *ridp) 3064 { 3065 idmap_get_handle_t *get_hdl = NULL; 3066 idmap_stat status; 3067 int err = EINVAL; 3068 3069 if (idmap_get_create(&get_hdl) != IDMAP_SUCCESS) 3070 goto out; 3071 3072 if (isuser) { 3073 err = idmap_get_sidbyuid(get_hdl, id, 3074 IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status); 3075 } else { 3076 err = idmap_get_sidbygid(get_hdl, id, 3077 IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status); 3078 } 3079 if (err == IDMAP_SUCCESS && 3080 idmap_get_mappings(get_hdl) == IDMAP_SUCCESS && 3081 status == IDMAP_SUCCESS) 3082 err = 0; 3083 else 3084 err = EINVAL; 3085 out: 3086 if (get_hdl) 3087 idmap_get_destroy(get_hdl); 3088 return (err); 3089 } 3090 #endif /* HAVE_IDMAP */ 3091 3092 /* 3093 * convert the propname into parameters needed by kernel 3094 * Eg: userquota@ahrens -> ZFS_PROP_USERQUOTA, "", 126829 3095 * Eg: userused@matt@domain -> ZFS_PROP_USERUSED, "S-1-123-456", 789 3096 * Eg: groupquota@staff -> ZFS_PROP_GROUPQUOTA, "", 1234 3097 * Eg: groupused@staff -> ZFS_PROP_GROUPUSED, "", 1234 3098 * Eg: projectquota@123 -> ZFS_PROP_PROJECTQUOTA, "", 123 3099 * Eg: projectused@789 -> ZFS_PROP_PROJECTUSED, "", 789 3100 */ 3101 static int 3102 userquota_propname_decode(const char *propname, boolean_t zoned, 3103 zfs_userquota_prop_t *typep, char *domain, int domainlen, uint64_t *ridp) 3104 { 3105 zfs_userquota_prop_t type; 3106 char *cp; 3107 boolean_t isuser; 3108 boolean_t isgroup; 3109 boolean_t isproject; 3110 struct passwd *pw; 3111 struct group *gr; 3112 3113 domain[0] = '\0'; 3114 3115 /* Figure out the property type ({user|group|project}{quota|space}) */ 3116 for (type = 0; type < ZFS_NUM_USERQUOTA_PROPS; type++) { 3117 if (strncmp(propname, zfs_userquota_prop_prefixes[type], 3118 strlen(zfs_userquota_prop_prefixes[type])) == 0) 3119 break; 3120 } 3121 if (type == ZFS_NUM_USERQUOTA_PROPS) 3122 return (EINVAL); 3123 *typep = type; 3124 3125 isuser = (type == ZFS_PROP_USERQUOTA || type == ZFS_PROP_USERUSED || 3126 type == ZFS_PROP_USEROBJQUOTA || 3127 type == ZFS_PROP_USEROBJUSED); 3128 isgroup = (type == ZFS_PROP_GROUPQUOTA || type == ZFS_PROP_GROUPUSED || 3129 type == ZFS_PROP_GROUPOBJQUOTA || 3130 type == ZFS_PROP_GROUPOBJUSED); 3131 isproject = (type == ZFS_PROP_PROJECTQUOTA || 3132 type == ZFS_PROP_PROJECTUSED || type == ZFS_PROP_PROJECTOBJQUOTA || 3133 type == ZFS_PROP_PROJECTOBJUSED); 3134 3135 cp = strchr(propname, '@') + 1; 3136 3137 if (isuser && (pw = getpwnam(cp)) != NULL) { 3138 if (zoned && getzoneid() == GLOBAL_ZONEID) 3139 return (ENOENT); 3140 *ridp = pw->pw_uid; 3141 } else if (isgroup && (gr = getgrnam(cp)) != NULL) { 3142 if (zoned && getzoneid() == GLOBAL_ZONEID) 3143 return (ENOENT); 3144 *ridp = gr->gr_gid; 3145 } else if (!isproject && strchr(cp, '@')) { 3146 #ifdef HAVE_IDMAP 3147 /* 3148 * It's a SID name (eg "user@domain") that needs to be 3149 * turned into S-1-domainID-RID. 3150 */ 3151 directory_error_t e; 3152 char *numericsid = NULL; 3153 char *end; 3154 3155 if (zoned && getzoneid() == GLOBAL_ZONEID) 3156 return (ENOENT); 3157 if (isuser) { 3158 e = directory_sid_from_user_name(NULL, 3159 cp, &numericsid); 3160 } else { 3161 e = directory_sid_from_group_name(NULL, 3162 cp, &numericsid); 3163 } 3164 if (e != NULL) { 3165 directory_error_free(e); 3166 return (ENOENT); 3167 } 3168 if (numericsid == NULL) 3169 return (ENOENT); 3170 cp = numericsid; 3171 (void) strlcpy(domain, cp, domainlen); 3172 cp = strrchr(domain, '-'); 3173 *cp = '\0'; 3174 cp++; 3175 3176 errno = 0; 3177 *ridp = strtoull(cp, &end, 10); 3178 free(numericsid); 3179 3180 if (errno != 0 || *end != '\0') 3181 return (EINVAL); 3182 #else 3183 (void) domainlen; 3184 return (ENOSYS); 3185 #endif /* HAVE_IDMAP */ 3186 } else { 3187 /* It's a user/group/project ID (eg "12345"). */ 3188 uid_t id; 3189 char *end; 3190 id = strtoul(cp, &end, 10); 3191 if (*end != '\0') 3192 return (EINVAL); 3193 if (id > MAXUID && !isproject) { 3194 #ifdef HAVE_IDMAP 3195 /* It's an ephemeral ID. */ 3196 idmap_rid_t rid; 3197 char *mapdomain; 3198 3199 if (idmap_id_to_numeric_domain_rid(id, isuser, 3200 &mapdomain, &rid) != 0) 3201 return (ENOENT); 3202 (void) strlcpy(domain, mapdomain, domainlen); 3203 *ridp = rid; 3204 #else 3205 return (ENOSYS); 3206 #endif /* HAVE_IDMAP */ 3207 } else { 3208 *ridp = id; 3209 } 3210 } 3211 3212 return (0); 3213 } 3214 3215 static int 3216 zfs_prop_get_userquota_common(zfs_handle_t *zhp, const char *propname, 3217 uint64_t *propvalue, zfs_userquota_prop_t *typep) 3218 { 3219 int err; 3220 zfs_cmd_t zc = {"\0"}; 3221 3222 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 3223 3224 err = userquota_propname_decode(propname, 3225 zfs_prop_get_int(zhp, ZFS_PROP_ZONED), 3226 typep, zc.zc_value, sizeof (zc.zc_value), &zc.zc_guid); 3227 zc.zc_objset_type = *typep; 3228 if (err) 3229 return (err); 3230 3231 err = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_USERSPACE_ONE, &zc); 3232 if (err) 3233 return (err); 3234 3235 *propvalue = zc.zc_cookie; 3236 return (0); 3237 } 3238 3239 int 3240 zfs_prop_get_userquota_int(zfs_handle_t *zhp, const char *propname, 3241 uint64_t *propvalue) 3242 { 3243 zfs_userquota_prop_t type; 3244 3245 return (zfs_prop_get_userquota_common(zhp, propname, propvalue, 3246 &type)); 3247 } 3248 3249 int 3250 zfs_prop_get_userquota(zfs_handle_t *zhp, const char *propname, 3251 char *propbuf, int proplen, boolean_t literal) 3252 { 3253 int err; 3254 uint64_t propvalue; 3255 zfs_userquota_prop_t type; 3256 3257 err = zfs_prop_get_userquota_common(zhp, propname, &propvalue, 3258 &type); 3259 3260 if (err) 3261 return (err); 3262 3263 if (literal) { 3264 (void) snprintf(propbuf, proplen, "%llu", 3265 (u_longlong_t)propvalue); 3266 } else if (propvalue == 0 && 3267 (type == ZFS_PROP_USERQUOTA || type == ZFS_PROP_GROUPQUOTA || 3268 type == ZFS_PROP_USEROBJQUOTA || type == ZFS_PROP_GROUPOBJQUOTA || 3269 type == ZFS_PROP_PROJECTQUOTA || 3270 type == ZFS_PROP_PROJECTOBJQUOTA)) { 3271 (void) strlcpy(propbuf, "none", proplen); 3272 } else if (type == ZFS_PROP_USERQUOTA || type == ZFS_PROP_GROUPQUOTA || 3273 type == ZFS_PROP_USERUSED || type == ZFS_PROP_GROUPUSED || 3274 type == ZFS_PROP_PROJECTUSED || type == ZFS_PROP_PROJECTQUOTA) { 3275 zfs_nicebytes(propvalue, propbuf, proplen); 3276 } else { 3277 zfs_nicenum(propvalue, propbuf, proplen); 3278 } 3279 return (0); 3280 } 3281 3282 /* 3283 * propname must start with "written@" or "written#". 3284 */ 3285 int 3286 zfs_prop_get_written_int(zfs_handle_t *zhp, const char *propname, 3287 uint64_t *propvalue) 3288 { 3289 int err; 3290 zfs_cmd_t zc = {"\0"}; 3291 const char *snapname; 3292 3293 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 3294 3295 assert(zfs_prop_written(propname)); 3296 snapname = propname + strlen("written@"); 3297 if (strchr(snapname, '@') != NULL || strchr(snapname, '#') != NULL) { 3298 /* full snapshot or bookmark name specified */ 3299 (void) strlcpy(zc.zc_value, snapname, sizeof (zc.zc_value)); 3300 } else { 3301 /* snapname is the short name, append it to zhp's fsname */ 3302 char *cp; 3303 3304 (void) strlcpy(zc.zc_value, zhp->zfs_name, 3305 sizeof (zc.zc_value)); 3306 cp = strchr(zc.zc_value, '@'); 3307 if (cp != NULL) 3308 *cp = '\0'; 3309 (void) strlcat(zc.zc_value, snapname - 1, sizeof (zc.zc_value)); 3310 } 3311 3312 err = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_SPACE_WRITTEN, &zc); 3313 if (err) 3314 return (err); 3315 3316 *propvalue = zc.zc_cookie; 3317 return (0); 3318 } 3319 3320 int 3321 zfs_prop_get_written(zfs_handle_t *zhp, const char *propname, 3322 char *propbuf, int proplen, boolean_t literal) 3323 { 3324 int err; 3325 uint64_t propvalue; 3326 3327 err = zfs_prop_get_written_int(zhp, propname, &propvalue); 3328 3329 if (err) 3330 return (err); 3331 3332 if (literal) { 3333 (void) snprintf(propbuf, proplen, "%llu", 3334 (u_longlong_t)propvalue); 3335 } else { 3336 zfs_nicebytes(propvalue, propbuf, proplen); 3337 } 3338 3339 return (0); 3340 } 3341 3342 /* 3343 * Returns the name of the given zfs handle. 3344 */ 3345 const char * 3346 zfs_get_name(const zfs_handle_t *zhp) 3347 { 3348 return (zhp->zfs_name); 3349 } 3350 3351 /* 3352 * Returns the name of the parent pool for the given zfs handle. 3353 */ 3354 const char * 3355 zfs_get_pool_name(const zfs_handle_t *zhp) 3356 { 3357 return (zhp->zpool_hdl->zpool_name); 3358 } 3359 3360 /* 3361 * Returns the type of the given zfs handle. 3362 */ 3363 zfs_type_t 3364 zfs_get_type(const zfs_handle_t *zhp) 3365 { 3366 return (zhp->zfs_type); 3367 } 3368 3369 /* 3370 * Returns the type of the given zfs handle, 3371 * or, if a snapshot, the type of the snapshotted dataset. 3372 */ 3373 zfs_type_t 3374 zfs_get_underlying_type(const zfs_handle_t *zhp) 3375 { 3376 return (zhp->zfs_head_type); 3377 } 3378 3379 /* 3380 * Is one dataset name a child dataset of another? 3381 * 3382 * Needs to handle these cases: 3383 * Dataset 1 "a/foo" "a/foo" "a/foo" "a/foo" 3384 * Dataset 2 "a/fo" "a/foobar" "a/bar/baz" "a/foo/bar" 3385 * Descendant? No. No. No. Yes. 3386 */ 3387 static boolean_t 3388 is_descendant(const char *ds1, const char *ds2) 3389 { 3390 size_t d1len = strlen(ds1); 3391 3392 /* ds2 can't be a descendant if it's smaller */ 3393 if (strlen(ds2) < d1len) 3394 return (B_FALSE); 3395 3396 /* otherwise, compare strings and verify that there's a '/' char */ 3397 return (ds2[d1len] == '/' && (strncmp(ds1, ds2, d1len) == 0)); 3398 } 3399 3400 /* 3401 * Given a complete name, return just the portion that refers to the parent. 3402 * Will return -1 if there is no parent (path is just the name of the 3403 * pool). 3404 */ 3405 static int 3406 parent_name(const char *path, char *buf, size_t buflen) 3407 { 3408 char *slashp; 3409 3410 (void) strlcpy(buf, path, buflen); 3411 3412 if ((slashp = strrchr(buf, '/')) == NULL) 3413 return (-1); 3414 *slashp = '\0'; 3415 3416 return (0); 3417 } 3418 3419 int 3420 zfs_parent_name(zfs_handle_t *zhp, char *buf, size_t buflen) 3421 { 3422 return (parent_name(zfs_get_name(zhp), buf, buflen)); 3423 } 3424 3425 /* 3426 * If accept_ancestor is false, then check to make sure that the given path has 3427 * a parent, and that it exists. If accept_ancestor is true, then find the 3428 * closest existing ancestor for the given path. In prefixlen return the 3429 * length of already existing prefix of the given path. We also fetch the 3430 * 'zoned' property, which is used to validate property settings when creating 3431 * new datasets. 3432 */ 3433 static int 3434 check_parents(libzfs_handle_t *hdl, const char *path, uint64_t *zoned, 3435 boolean_t accept_ancestor, int *prefixlen) 3436 { 3437 zfs_cmd_t zc = {"\0"}; 3438 char parent[ZFS_MAX_DATASET_NAME_LEN]; 3439 char *slash; 3440 zfs_handle_t *zhp; 3441 char errbuf[ERRBUFLEN]; 3442 uint64_t is_zoned; 3443 3444 (void) snprintf(errbuf, sizeof (errbuf), 3445 dgettext(TEXT_DOMAIN, "cannot create '%s'"), path); 3446 3447 /* get parent, and check to see if this is just a pool */ 3448 if (parent_name(path, parent, sizeof (parent)) != 0) { 3449 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3450 "missing dataset name")); 3451 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3452 } 3453 3454 /* check to see if the pool exists */ 3455 if ((slash = strchr(parent, '/')) == NULL) 3456 slash = parent + strlen(parent); 3457 (void) strlcpy(zc.zc_name, parent, 3458 MIN(sizeof (zc.zc_name), slash - parent + 1)); 3459 if (zfs_ioctl(hdl, ZFS_IOC_OBJSET_STATS, &zc) != 0 && 3460 errno == ENOENT) { 3461 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3462 "no such pool '%s'"), zc.zc_name); 3463 return (zfs_error(hdl, EZFS_NOENT, errbuf)); 3464 } 3465 3466 /* check to see if the parent dataset exists */ 3467 while ((zhp = make_dataset_handle(hdl, parent)) == NULL) { 3468 if (errno == ENOENT && accept_ancestor) { 3469 /* 3470 * Go deeper to find an ancestor, give up on top level. 3471 */ 3472 if (parent_name(parent, parent, sizeof (parent)) != 0) { 3473 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3474 "no such pool '%s'"), zc.zc_name); 3475 return (zfs_error(hdl, EZFS_NOENT, errbuf)); 3476 } 3477 } else if (errno == ENOENT) { 3478 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3479 "parent does not exist")); 3480 return (zfs_error(hdl, EZFS_NOENT, errbuf)); 3481 } else 3482 return (zfs_standard_error(hdl, errno, errbuf)); 3483 } 3484 3485 is_zoned = zfs_prop_get_int(zhp, ZFS_PROP_ZONED); 3486 if (zoned != NULL) 3487 *zoned = is_zoned; 3488 3489 /* we are in a non-global zone, but parent is in the global zone */ 3490 if (getzoneid() != GLOBAL_ZONEID && !is_zoned) { 3491 (void) zfs_standard_error(hdl, EPERM, errbuf); 3492 zfs_close(zhp); 3493 return (-1); 3494 } 3495 3496 /* make sure parent is a filesystem */ 3497 if (zfs_get_type(zhp) != ZFS_TYPE_FILESYSTEM) { 3498 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3499 "parent is not a filesystem")); 3500 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf); 3501 zfs_close(zhp); 3502 return (-1); 3503 } 3504 3505 zfs_close(zhp); 3506 if (prefixlen != NULL) 3507 *prefixlen = strlen(parent); 3508 return (0); 3509 } 3510 3511 /* 3512 * Finds whether the dataset of the given type(s) exists. 3513 */ 3514 boolean_t 3515 zfs_dataset_exists(libzfs_handle_t *hdl, const char *path, zfs_type_t types) 3516 { 3517 zfs_handle_t *zhp; 3518 3519 if (!zfs_validate_name(hdl, path, types, B_FALSE)) 3520 return (B_FALSE); 3521 3522 /* 3523 * Try to get stats for the dataset, which will tell us if it exists. 3524 */ 3525 if ((zhp = make_dataset_handle(hdl, path)) != NULL) { 3526 int ds_type = zhp->zfs_type; 3527 3528 zfs_close(zhp); 3529 if (types & ds_type) 3530 return (B_TRUE); 3531 } 3532 return (B_FALSE); 3533 } 3534 3535 /* 3536 * Given a path to 'target', create all the ancestors between 3537 * the prefixlen portion of the path, and the target itself. 3538 * Fail if the initial prefixlen-ancestor does not already exist. 3539 */ 3540 int 3541 create_parents(libzfs_handle_t *hdl, char *target, int prefixlen) 3542 { 3543 zfs_handle_t *h; 3544 char *cp; 3545 const char *opname; 3546 3547 /* make sure prefix exists */ 3548 cp = target + prefixlen; 3549 if (*cp != '/') { 3550 assert(strchr(cp, '/') == NULL); 3551 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM); 3552 } else { 3553 *cp = '\0'; 3554 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM); 3555 *cp = '/'; 3556 } 3557 if (h == NULL) 3558 return (-1); 3559 zfs_close(h); 3560 3561 /* 3562 * Attempt to create, mount, and share any ancestor filesystems, 3563 * up to the prefixlen-long one. 3564 */ 3565 for (cp = target + prefixlen + 1; 3566 (cp = strchr(cp, '/')) != NULL; *cp = '/', cp++) { 3567 3568 *cp = '\0'; 3569 3570 h = make_dataset_handle(hdl, target); 3571 if (h) { 3572 /* it already exists, nothing to do here */ 3573 zfs_close(h); 3574 continue; 3575 } 3576 3577 if (zfs_create(hdl, target, ZFS_TYPE_FILESYSTEM, 3578 NULL) != 0) { 3579 opname = dgettext(TEXT_DOMAIN, "create"); 3580 goto ancestorerr; 3581 } 3582 3583 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM); 3584 if (h == NULL) { 3585 opname = dgettext(TEXT_DOMAIN, "open"); 3586 goto ancestorerr; 3587 } 3588 3589 if (zfs_mount(h, NULL, 0) != 0) { 3590 opname = dgettext(TEXT_DOMAIN, "mount"); 3591 goto ancestorerr; 3592 } 3593 3594 if (zfs_share(h, NULL) != 0) { 3595 opname = dgettext(TEXT_DOMAIN, "share"); 3596 goto ancestorerr; 3597 } 3598 3599 zfs_close(h); 3600 } 3601 zfs_commit_shares(NULL); 3602 3603 return (0); 3604 3605 ancestorerr: 3606 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3607 "failed to %s ancestor '%s'"), opname, target); 3608 return (-1); 3609 } 3610 3611 /* 3612 * Creates non-existing ancestors of the given path. 3613 */ 3614 int 3615 zfs_create_ancestors(libzfs_handle_t *hdl, const char *path) 3616 { 3617 int prefix; 3618 char *path_copy; 3619 char errbuf[ERRBUFLEN]; 3620 int rc = 0; 3621 3622 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3623 "cannot create '%s'"), path); 3624 3625 /* 3626 * Check that we are not passing the nesting limit 3627 * before we start creating any ancestors. 3628 */ 3629 if (dataset_nestcheck(path) != 0) { 3630 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3631 "maximum name nesting depth exceeded")); 3632 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3633 } 3634 3635 if (check_parents(hdl, path, NULL, B_TRUE, &prefix) != 0) 3636 return (-1); 3637 3638 if ((path_copy = strdup(path)) != NULL) { 3639 rc = create_parents(hdl, path_copy, prefix); 3640 free(path_copy); 3641 } 3642 if (path_copy == NULL || rc != 0) 3643 return (-1); 3644 3645 return (0); 3646 } 3647 3648 /* 3649 * Create a new filesystem or volume. 3650 */ 3651 int 3652 zfs_create(libzfs_handle_t *hdl, const char *path, zfs_type_t type, 3653 nvlist_t *props) 3654 { 3655 int ret; 3656 uint64_t size = 0; 3657 uint64_t blocksize = zfs_prop_default_numeric(ZFS_PROP_VOLBLOCKSIZE); 3658 uint64_t zoned; 3659 enum lzc_dataset_type ost; 3660 zpool_handle_t *zpool_handle; 3661 uint8_t *wkeydata = NULL; 3662 uint_t wkeylen = 0; 3663 char errbuf[ERRBUFLEN]; 3664 char parent[ZFS_MAX_DATASET_NAME_LEN]; 3665 3666 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3667 "cannot create '%s'"), path); 3668 3669 /* validate the path, taking care to note the extended error message */ 3670 if (!zfs_validate_name(hdl, path, type, B_TRUE)) 3671 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3672 3673 if (dataset_nestcheck(path) != 0) { 3674 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3675 "maximum name nesting depth exceeded")); 3676 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3677 } 3678 3679 /* validate parents exist */ 3680 if (check_parents(hdl, path, &zoned, B_FALSE, NULL) != 0) 3681 return (-1); 3682 3683 /* 3684 * The failure modes when creating a dataset of a different type over 3685 * one that already exists is a little strange. In particular, if you 3686 * try to create a dataset on top of an existing dataset, the ioctl() 3687 * will return ENOENT, not EEXIST. To prevent this from happening, we 3688 * first try to see if the dataset exists. 3689 */ 3690 if (zfs_dataset_exists(hdl, path, ZFS_TYPE_DATASET)) { 3691 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3692 "dataset already exists")); 3693 return (zfs_error(hdl, EZFS_EXISTS, errbuf)); 3694 } 3695 3696 if (type == ZFS_TYPE_VOLUME) 3697 ost = LZC_DATSET_TYPE_ZVOL; 3698 else 3699 ost = LZC_DATSET_TYPE_ZFS; 3700 3701 /* open zpool handle for prop validation */ 3702 char pool_path[ZFS_MAX_DATASET_NAME_LEN]; 3703 (void) strlcpy(pool_path, path, sizeof (pool_path)); 3704 3705 /* truncate pool_path at first slash */ 3706 char *p = strchr(pool_path, '/'); 3707 if (p != NULL) 3708 *p = '\0'; 3709 3710 if ((zpool_handle = zpool_open(hdl, pool_path)) == NULL) 3711 return (-1); 3712 3713 if (props && (props = zfs_valid_proplist(hdl, type, props, 3714 zoned, NULL, zpool_handle, B_TRUE, errbuf)) == 0) { 3715 zpool_close(zpool_handle); 3716 return (-1); 3717 } 3718 zpool_close(zpool_handle); 3719 3720 if (type == ZFS_TYPE_VOLUME) { 3721 /* 3722 * If we are creating a volume, the size and block size must 3723 * satisfy a few restraints. First, the blocksize must be a 3724 * valid block size between SPA_{MIN,MAX}BLOCKSIZE. Second, the 3725 * volsize must be a multiple of the block size, and cannot be 3726 * zero. 3727 */ 3728 if (props == NULL || nvlist_lookup_uint64(props, 3729 zfs_prop_to_name(ZFS_PROP_VOLSIZE), &size) != 0) { 3730 nvlist_free(props); 3731 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3732 "missing volume size")); 3733 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 3734 } 3735 3736 if ((ret = nvlist_lookup_uint64(props, 3737 zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE), 3738 &blocksize)) != 0) { 3739 if (ret == ENOENT) { 3740 blocksize = zfs_prop_default_numeric( 3741 ZFS_PROP_VOLBLOCKSIZE); 3742 } else { 3743 nvlist_free(props); 3744 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3745 "missing volume block size")); 3746 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 3747 } 3748 } 3749 3750 if (size == 0) { 3751 nvlist_free(props); 3752 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3753 "volume size cannot be zero")); 3754 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 3755 } 3756 3757 if (size % blocksize != 0) { 3758 nvlist_free(props); 3759 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3760 "volume size must be a multiple of volume block " 3761 "size")); 3762 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 3763 } 3764 } 3765 3766 (void) parent_name(path, parent, sizeof (parent)); 3767 if (zfs_crypto_create(hdl, parent, props, NULL, B_TRUE, 3768 &wkeydata, &wkeylen) != 0) { 3769 nvlist_free(props); 3770 return (zfs_error(hdl, EZFS_CRYPTOFAILED, errbuf)); 3771 } 3772 3773 /* create the dataset */ 3774 ret = lzc_create(path, ost, props, wkeydata, wkeylen); 3775 nvlist_free(props); 3776 if (wkeydata != NULL) 3777 free(wkeydata); 3778 3779 /* check for failure */ 3780 if (ret != 0) { 3781 switch (errno) { 3782 case ENOENT: 3783 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3784 "no such parent '%s'"), parent); 3785 return (zfs_error(hdl, EZFS_NOENT, errbuf)); 3786 3787 case ENOTSUP: 3788 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3789 "pool must be upgraded to set this " 3790 "property or value")); 3791 return (zfs_error(hdl, EZFS_BADVERSION, errbuf)); 3792 3793 case EACCES: 3794 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3795 "encryption root's key is not loaded " 3796 "or provided")); 3797 return (zfs_error(hdl, EZFS_CRYPTOFAILED, errbuf)); 3798 3799 case ERANGE: 3800 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3801 "invalid property value(s) specified")); 3802 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 3803 #ifdef _ILP32 3804 case EOVERFLOW: 3805 /* 3806 * This platform can't address a volume this big. 3807 */ 3808 if (type == ZFS_TYPE_VOLUME) 3809 return (zfs_error(hdl, EZFS_VOLTOOBIG, 3810 errbuf)); 3811 zfs_fallthrough; 3812 #endif 3813 default: 3814 return (zfs_standard_error(hdl, errno, errbuf)); 3815 } 3816 } 3817 3818 return (0); 3819 } 3820 3821 /* 3822 * Destroys the given dataset. The caller must make sure that the filesystem 3823 * isn't mounted, and that there are no active dependents. If the file system 3824 * does not exist this function does nothing. 3825 */ 3826 int 3827 zfs_destroy(zfs_handle_t *zhp, boolean_t defer) 3828 { 3829 int error; 3830 3831 if (zhp->zfs_type != ZFS_TYPE_SNAPSHOT && defer) 3832 return (EINVAL); 3833 3834 if (zhp->zfs_type == ZFS_TYPE_BOOKMARK) { 3835 nvlist_t *nv = fnvlist_alloc(); 3836 fnvlist_add_boolean(nv, zhp->zfs_name); 3837 error = lzc_destroy_bookmarks(nv, NULL); 3838 fnvlist_free(nv); 3839 if (error != 0) { 3840 return (zfs_standard_error_fmt(zhp->zfs_hdl, error, 3841 dgettext(TEXT_DOMAIN, "cannot destroy '%s'"), 3842 zhp->zfs_name)); 3843 } 3844 return (0); 3845 } 3846 3847 if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) { 3848 nvlist_t *nv = fnvlist_alloc(); 3849 fnvlist_add_boolean(nv, zhp->zfs_name); 3850 error = lzc_destroy_snaps(nv, defer, NULL); 3851 fnvlist_free(nv); 3852 } else { 3853 error = lzc_destroy(zhp->zfs_name); 3854 } 3855 3856 if (error != 0 && error != ENOENT) { 3857 return (zfs_standard_error_fmt(zhp->zfs_hdl, errno, 3858 dgettext(TEXT_DOMAIN, "cannot destroy '%s'"), 3859 zhp->zfs_name)); 3860 } 3861 3862 remove_mountpoint(zhp); 3863 3864 return (0); 3865 } 3866 3867 struct destroydata { 3868 nvlist_t *nvl; 3869 const char *snapname; 3870 }; 3871 3872 static int 3873 zfs_check_snap_cb(zfs_handle_t *zhp, void *arg) 3874 { 3875 struct destroydata *dd = arg; 3876 char name[ZFS_MAX_DATASET_NAME_LEN]; 3877 int rv = 0; 3878 3879 if (snprintf(name, sizeof (name), "%s@%s", zhp->zfs_name, 3880 dd->snapname) >= sizeof (name)) 3881 return (EINVAL); 3882 3883 if (lzc_exists(name)) 3884 fnvlist_add_boolean(dd->nvl, name); 3885 3886 rv = zfs_iter_filesystems(zhp, zfs_check_snap_cb, dd); 3887 zfs_close(zhp); 3888 return (rv); 3889 } 3890 3891 /* 3892 * Destroys all snapshots with the given name in zhp & descendants. 3893 */ 3894 int 3895 zfs_destroy_snaps(zfs_handle_t *zhp, char *snapname, boolean_t defer) 3896 { 3897 int ret; 3898 struct destroydata dd = { 0 }; 3899 3900 dd.snapname = snapname; 3901 dd.nvl = fnvlist_alloc(); 3902 (void) zfs_check_snap_cb(zfs_handle_dup(zhp), &dd); 3903 3904 if (nvlist_empty(dd.nvl)) { 3905 ret = zfs_standard_error_fmt(zhp->zfs_hdl, ENOENT, 3906 dgettext(TEXT_DOMAIN, "cannot destroy '%s@%s'"), 3907 zhp->zfs_name, snapname); 3908 } else { 3909 ret = zfs_destroy_snaps_nvl(zhp->zfs_hdl, dd.nvl, defer); 3910 } 3911 fnvlist_free(dd.nvl); 3912 return (ret); 3913 } 3914 3915 /* 3916 * Destroys all the snapshots named in the nvlist. 3917 */ 3918 int 3919 zfs_destroy_snaps_nvl(libzfs_handle_t *hdl, nvlist_t *snaps, boolean_t defer) 3920 { 3921 nvlist_t *errlist = NULL; 3922 nvpair_t *pair; 3923 3924 int ret = zfs_destroy_snaps_nvl_os(hdl, snaps); 3925 if (ret != 0) 3926 return (ret); 3927 3928 ret = lzc_destroy_snaps(snaps, defer, &errlist); 3929 3930 if (ret == 0) { 3931 nvlist_free(errlist); 3932 return (0); 3933 } 3934 3935 if (nvlist_empty(errlist)) { 3936 char errbuf[ERRBUFLEN]; 3937 (void) snprintf(errbuf, sizeof (errbuf), 3938 dgettext(TEXT_DOMAIN, "cannot destroy snapshots")); 3939 3940 ret = zfs_standard_error(hdl, ret, errbuf); 3941 } 3942 for (pair = nvlist_next_nvpair(errlist, NULL); 3943 pair != NULL; pair = nvlist_next_nvpair(errlist, pair)) { 3944 char errbuf[ERRBUFLEN]; 3945 (void) snprintf(errbuf, sizeof (errbuf), 3946 dgettext(TEXT_DOMAIN, "cannot destroy snapshot %s"), 3947 nvpair_name(pair)); 3948 3949 switch (fnvpair_value_int32(pair)) { 3950 case EEXIST: 3951 zfs_error_aux(hdl, 3952 dgettext(TEXT_DOMAIN, "snapshot is cloned")); 3953 ret = zfs_error(hdl, EZFS_EXISTS, errbuf); 3954 break; 3955 default: 3956 ret = zfs_standard_error(hdl, errno, errbuf); 3957 break; 3958 } 3959 } 3960 3961 nvlist_free(errlist); 3962 return (ret); 3963 } 3964 3965 /* 3966 * Clones the given dataset. The target must be of the same type as the source. 3967 */ 3968 int 3969 zfs_clone(zfs_handle_t *zhp, const char *target, nvlist_t *props) 3970 { 3971 char parent[ZFS_MAX_DATASET_NAME_LEN]; 3972 int ret; 3973 char errbuf[ERRBUFLEN]; 3974 libzfs_handle_t *hdl = zhp->zfs_hdl; 3975 uint64_t zoned; 3976 3977 assert(zhp->zfs_type == ZFS_TYPE_SNAPSHOT); 3978 3979 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3980 "cannot create '%s'"), target); 3981 3982 /* validate the target/clone name */ 3983 if (!zfs_validate_name(hdl, target, ZFS_TYPE_FILESYSTEM, B_TRUE)) 3984 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3985 3986 /* validate parents exist */ 3987 if (check_parents(hdl, target, &zoned, B_FALSE, NULL) != 0) 3988 return (-1); 3989 3990 (void) parent_name(target, parent, sizeof (parent)); 3991 3992 /* do the clone */ 3993 3994 if (props) { 3995 zfs_type_t type = ZFS_TYPE_FILESYSTEM; 3996 3997 if (ZFS_IS_VOLUME(zhp)) 3998 type = ZFS_TYPE_VOLUME; 3999 if ((props = zfs_valid_proplist(hdl, type, props, zoned, 4000 zhp, zhp->zpool_hdl, B_TRUE, errbuf)) == NULL) 4001 return (-1); 4002 if (zfs_fix_auto_resv(zhp, props) == -1) { 4003 nvlist_free(props); 4004 return (-1); 4005 } 4006 } 4007 4008 if (zfs_crypto_clone_check(hdl, zhp, parent, props) != 0) { 4009 nvlist_free(props); 4010 return (zfs_error(hdl, EZFS_CRYPTOFAILED, errbuf)); 4011 } 4012 4013 ret = lzc_clone(target, zhp->zfs_name, props); 4014 nvlist_free(props); 4015 4016 if (ret != 0) { 4017 switch (errno) { 4018 4019 case ENOENT: 4020 /* 4021 * The parent doesn't exist. We should have caught this 4022 * above, but there may a race condition that has since 4023 * destroyed the parent. 4024 * 4025 * At this point, we don't know whether it's the source 4026 * that doesn't exist anymore, or whether the target 4027 * dataset doesn't exist. 4028 */ 4029 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN, 4030 "no such parent '%s'"), parent); 4031 return (zfs_error(zhp->zfs_hdl, EZFS_NOENT, errbuf)); 4032 4033 case EXDEV: 4034 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN, 4035 "source and target pools differ")); 4036 return (zfs_error(zhp->zfs_hdl, EZFS_CROSSTARGET, 4037 errbuf)); 4038 4039 default: 4040 return (zfs_standard_error(zhp->zfs_hdl, errno, 4041 errbuf)); 4042 } 4043 } 4044 4045 return (ret); 4046 } 4047 4048 /* 4049 * Promotes the given clone fs to be the clone parent. 4050 */ 4051 int 4052 zfs_promote(zfs_handle_t *zhp) 4053 { 4054 libzfs_handle_t *hdl = zhp->zfs_hdl; 4055 char snapname[ZFS_MAX_DATASET_NAME_LEN]; 4056 int ret; 4057 char errbuf[ERRBUFLEN]; 4058 4059 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 4060 "cannot promote '%s'"), zhp->zfs_name); 4061 4062 if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) { 4063 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4064 "snapshots can not be promoted")); 4065 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 4066 } 4067 4068 if (zhp->zfs_dmustats.dds_origin[0] == '\0') { 4069 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4070 "not a cloned filesystem")); 4071 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 4072 } 4073 4074 if (!zfs_validate_name(hdl, zhp->zfs_name, zhp->zfs_type, B_TRUE)) 4075 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 4076 4077 ret = lzc_promote(zhp->zfs_name, snapname, sizeof (snapname)); 4078 4079 if (ret != 0) { 4080 switch (ret) { 4081 case EACCES: 4082 /* 4083 * Promoting encrypted dataset outside its 4084 * encryption root. 4085 */ 4086 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4087 "cannot promote dataset outside its " 4088 "encryption root")); 4089 return (zfs_error(hdl, EZFS_EXISTS, errbuf)); 4090 4091 case EEXIST: 4092 /* There is a conflicting snapshot name. */ 4093 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4094 "conflicting snapshot '%s' from parent '%s'"), 4095 snapname, zhp->zfs_dmustats.dds_origin); 4096 return (zfs_error(hdl, EZFS_EXISTS, errbuf)); 4097 4098 default: 4099 return (zfs_standard_error(hdl, ret, errbuf)); 4100 } 4101 } 4102 return (ret); 4103 } 4104 4105 typedef struct snapdata { 4106 nvlist_t *sd_nvl; 4107 const char *sd_snapname; 4108 } snapdata_t; 4109 4110 static int 4111 zfs_snapshot_cb(zfs_handle_t *zhp, void *arg) 4112 { 4113 snapdata_t *sd = arg; 4114 char name[ZFS_MAX_DATASET_NAME_LEN]; 4115 int rv = 0; 4116 4117 if (zfs_prop_get_int(zhp, ZFS_PROP_INCONSISTENT) == 0) { 4118 if (snprintf(name, sizeof (name), "%s@%s", zfs_get_name(zhp), 4119 sd->sd_snapname) >= sizeof (name)) 4120 return (EINVAL); 4121 4122 fnvlist_add_boolean(sd->sd_nvl, name); 4123 4124 rv = zfs_iter_filesystems(zhp, zfs_snapshot_cb, sd); 4125 } 4126 zfs_close(zhp); 4127 4128 return (rv); 4129 } 4130 4131 /* 4132 * Creates snapshots. The keys in the snaps nvlist are the snapshots to be 4133 * created. 4134 */ 4135 int 4136 zfs_snapshot_nvl(libzfs_handle_t *hdl, nvlist_t *snaps, nvlist_t *props) 4137 { 4138 int ret; 4139 char errbuf[ERRBUFLEN]; 4140 nvpair_t *elem; 4141 nvlist_t *errors; 4142 zpool_handle_t *zpool_hdl; 4143 char pool[ZFS_MAX_DATASET_NAME_LEN]; 4144 4145 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 4146 "cannot create snapshots ")); 4147 4148 elem = NULL; 4149 while ((elem = nvlist_next_nvpair(snaps, elem)) != NULL) { 4150 const char *snapname = nvpair_name(elem); 4151 4152 /* validate the target name */ 4153 if (!zfs_validate_name(hdl, snapname, ZFS_TYPE_SNAPSHOT, 4154 B_TRUE)) { 4155 (void) snprintf(errbuf, sizeof (errbuf), 4156 dgettext(TEXT_DOMAIN, 4157 "cannot create snapshot '%s'"), snapname); 4158 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 4159 } 4160 } 4161 4162 /* 4163 * get pool handle for prop validation. assumes all snaps are in the 4164 * same pool, as does lzc_snapshot (below). 4165 */ 4166 elem = nvlist_next_nvpair(snaps, NULL); 4167 if (elem == NULL) 4168 return (-1); 4169 (void) strlcpy(pool, nvpair_name(elem), sizeof (pool)); 4170 pool[strcspn(pool, "/@")] = '\0'; 4171 zpool_hdl = zpool_open(hdl, pool); 4172 if (zpool_hdl == NULL) 4173 return (-1); 4174 4175 if (props != NULL && 4176 (props = zfs_valid_proplist(hdl, ZFS_TYPE_SNAPSHOT, 4177 props, B_FALSE, NULL, zpool_hdl, B_FALSE, errbuf)) == NULL) { 4178 zpool_close(zpool_hdl); 4179 return (-1); 4180 } 4181 zpool_close(zpool_hdl); 4182 4183 ret = lzc_snapshot(snaps, props, &errors); 4184 4185 if (ret != 0) { 4186 boolean_t printed = B_FALSE; 4187 for (elem = nvlist_next_nvpair(errors, NULL); 4188 elem != NULL; 4189 elem = nvlist_next_nvpair(errors, elem)) { 4190 (void) snprintf(errbuf, sizeof (errbuf), 4191 dgettext(TEXT_DOMAIN, 4192 "cannot create snapshot '%s'"), nvpair_name(elem)); 4193 (void) zfs_standard_error(hdl, 4194 fnvpair_value_int32(elem), errbuf); 4195 printed = B_TRUE; 4196 } 4197 if (!printed) { 4198 switch (ret) { 4199 case EXDEV: 4200 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4201 "multiple snapshots of same " 4202 "fs not allowed")); 4203 (void) zfs_error(hdl, EZFS_EXISTS, errbuf); 4204 4205 break; 4206 default: 4207 (void) zfs_standard_error(hdl, ret, errbuf); 4208 } 4209 } 4210 } 4211 4212 nvlist_free(props); 4213 nvlist_free(errors); 4214 return (ret); 4215 } 4216 4217 int 4218 zfs_snapshot(libzfs_handle_t *hdl, const char *path, boolean_t recursive, 4219 nvlist_t *props) 4220 { 4221 int ret; 4222 snapdata_t sd = { 0 }; 4223 char fsname[ZFS_MAX_DATASET_NAME_LEN]; 4224 char *cp; 4225 zfs_handle_t *zhp; 4226 char errbuf[ERRBUFLEN]; 4227 4228 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 4229 "cannot snapshot %s"), path); 4230 4231 if (!zfs_validate_name(hdl, path, ZFS_TYPE_SNAPSHOT, B_TRUE)) 4232 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 4233 4234 (void) strlcpy(fsname, path, sizeof (fsname)); 4235 cp = strchr(fsname, '@'); 4236 *cp = '\0'; 4237 sd.sd_snapname = cp + 1; 4238 4239 if ((zhp = zfs_open(hdl, fsname, ZFS_TYPE_FILESYSTEM | 4240 ZFS_TYPE_VOLUME)) == NULL) { 4241 return (-1); 4242 } 4243 4244 sd.sd_nvl = fnvlist_alloc(); 4245 if (recursive) { 4246 (void) zfs_snapshot_cb(zfs_handle_dup(zhp), &sd); 4247 } else { 4248 fnvlist_add_boolean(sd.sd_nvl, path); 4249 } 4250 4251 ret = zfs_snapshot_nvl(hdl, sd.sd_nvl, props); 4252 fnvlist_free(sd.sd_nvl); 4253 zfs_close(zhp); 4254 return (ret); 4255 } 4256 4257 /* 4258 * Destroy any more recent snapshots. We invoke this callback on any dependents 4259 * of the snapshot first. If the 'cb_dependent' member is non-zero, then this 4260 * is a dependent and we should just destroy it without checking the transaction 4261 * group. 4262 */ 4263 typedef struct rollback_data { 4264 const char *cb_target; /* the snapshot */ 4265 uint64_t cb_create; /* creation time reference */ 4266 boolean_t cb_error; 4267 boolean_t cb_force; 4268 } rollback_data_t; 4269 4270 static int 4271 rollback_destroy_dependent(zfs_handle_t *zhp, void *data) 4272 { 4273 rollback_data_t *cbp = data; 4274 prop_changelist_t *clp; 4275 4276 /* We must destroy this clone; first unmount it */ 4277 clp = changelist_gather(zhp, ZFS_PROP_NAME, 0, 4278 cbp->cb_force ? MS_FORCE: 0); 4279 if (clp == NULL || changelist_prefix(clp) != 0) { 4280 cbp->cb_error = B_TRUE; 4281 zfs_close(zhp); 4282 return (0); 4283 } 4284 if (zfs_destroy(zhp, B_FALSE) != 0) 4285 cbp->cb_error = B_TRUE; 4286 else 4287 changelist_remove(clp, zhp->zfs_name); 4288 (void) changelist_postfix(clp); 4289 changelist_free(clp); 4290 4291 zfs_close(zhp); 4292 return (0); 4293 } 4294 4295 static int 4296 rollback_destroy(zfs_handle_t *zhp, void *data) 4297 { 4298 rollback_data_t *cbp = data; 4299 4300 if (zfs_prop_get_int(zhp, ZFS_PROP_CREATETXG) > cbp->cb_create) { 4301 cbp->cb_error |= zfs_iter_dependents(zhp, B_FALSE, 4302 rollback_destroy_dependent, cbp); 4303 4304 cbp->cb_error |= zfs_destroy(zhp, B_FALSE); 4305 } 4306 4307 zfs_close(zhp); 4308 return (0); 4309 } 4310 4311 /* 4312 * Given a dataset, rollback to a specific snapshot, discarding any 4313 * data changes since then and making it the active dataset. 4314 * 4315 * Any snapshots and bookmarks more recent than the target are 4316 * destroyed, along with their dependents (i.e. clones). 4317 */ 4318 int 4319 zfs_rollback(zfs_handle_t *zhp, zfs_handle_t *snap, boolean_t force) 4320 { 4321 rollback_data_t cb = { 0 }; 4322 int err; 4323 boolean_t restore_resv = 0; 4324 uint64_t old_volsize = 0, new_volsize; 4325 zfs_prop_t resv_prop = { 0 }; 4326 uint64_t min_txg = 0; 4327 4328 assert(zhp->zfs_type == ZFS_TYPE_FILESYSTEM || 4329 zhp->zfs_type == ZFS_TYPE_VOLUME); 4330 4331 /* 4332 * Destroy all recent snapshots and their dependents. 4333 */ 4334 cb.cb_force = force; 4335 cb.cb_target = snap->zfs_name; 4336 cb.cb_create = zfs_prop_get_int(snap, ZFS_PROP_CREATETXG); 4337 4338 if (cb.cb_create > 0) 4339 min_txg = cb.cb_create; 4340 4341 (void) zfs_iter_snapshots(zhp, B_FALSE, rollback_destroy, &cb, 4342 min_txg, 0); 4343 4344 (void) zfs_iter_bookmarks(zhp, rollback_destroy, &cb); 4345 4346 if (cb.cb_error) 4347 return (-1); 4348 4349 /* 4350 * Now that we have verified that the snapshot is the latest, 4351 * rollback to the given snapshot. 4352 */ 4353 4354 if (zhp->zfs_type == ZFS_TYPE_VOLUME) { 4355 if (zfs_which_resv_prop(zhp, &resv_prop) < 0) 4356 return (-1); 4357 old_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE); 4358 restore_resv = 4359 (old_volsize == zfs_prop_get_int(zhp, resv_prop)); 4360 } 4361 4362 /* 4363 * Pass both the filesystem and the wanted snapshot names, 4364 * we would get an error back if the snapshot is destroyed or 4365 * a new snapshot is created before this request is processed. 4366 */ 4367 err = lzc_rollback_to(zhp->zfs_name, snap->zfs_name); 4368 if (err != 0) { 4369 char errbuf[ERRBUFLEN]; 4370 4371 (void) snprintf(errbuf, sizeof (errbuf), 4372 dgettext(TEXT_DOMAIN, "cannot rollback '%s'"), 4373 zhp->zfs_name); 4374 switch (err) { 4375 case EEXIST: 4376 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN, 4377 "there is a snapshot or bookmark more recent " 4378 "than '%s'"), snap->zfs_name); 4379 (void) zfs_error(zhp->zfs_hdl, EZFS_EXISTS, errbuf); 4380 break; 4381 case ESRCH: 4382 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN, 4383 "'%s' is not found among snapshots of '%s'"), 4384 snap->zfs_name, zhp->zfs_name); 4385 (void) zfs_error(zhp->zfs_hdl, EZFS_NOENT, errbuf); 4386 break; 4387 case EINVAL: 4388 (void) zfs_error(zhp->zfs_hdl, EZFS_BADTYPE, errbuf); 4389 break; 4390 default: 4391 (void) zfs_standard_error(zhp->zfs_hdl, err, errbuf); 4392 } 4393 return (err); 4394 } 4395 4396 /* 4397 * For volumes, if the pre-rollback volsize matched the pre- 4398 * rollback reservation and the volsize has changed then set 4399 * the reservation property to the post-rollback volsize. 4400 * Make a new handle since the rollback closed the dataset. 4401 */ 4402 if ((zhp->zfs_type == ZFS_TYPE_VOLUME) && 4403 (zhp = make_dataset_handle(zhp->zfs_hdl, zhp->zfs_name))) { 4404 if (restore_resv) { 4405 new_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE); 4406 if (old_volsize != new_volsize) 4407 err = zfs_prop_set_int(zhp, resv_prop, 4408 new_volsize); 4409 } 4410 zfs_close(zhp); 4411 } 4412 return (err); 4413 } 4414 4415 /* 4416 * Renames the given dataset. 4417 */ 4418 int 4419 zfs_rename(zfs_handle_t *zhp, const char *target, renameflags_t flags) 4420 { 4421 int ret = 0; 4422 zfs_cmd_t zc = {"\0"}; 4423 char *delim; 4424 prop_changelist_t *cl = NULL; 4425 char parent[ZFS_MAX_DATASET_NAME_LEN]; 4426 char property[ZFS_MAXPROPLEN]; 4427 libzfs_handle_t *hdl = zhp->zfs_hdl; 4428 char errbuf[ERRBUFLEN]; 4429 4430 /* if we have the same exact name, just return success */ 4431 if (strcmp(zhp->zfs_name, target) == 0) 4432 return (0); 4433 4434 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 4435 "cannot rename to '%s'"), target); 4436 4437 /* make sure source name is valid */ 4438 if (!zfs_validate_name(hdl, zhp->zfs_name, zhp->zfs_type, B_TRUE)) 4439 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 4440 4441 /* 4442 * Make sure the target name is valid 4443 */ 4444 if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) { 4445 if ((strchr(target, '@') == NULL) || 4446 *target == '@') { 4447 /* 4448 * Snapshot target name is abbreviated, 4449 * reconstruct full dataset name 4450 */ 4451 (void) strlcpy(parent, zhp->zfs_name, 4452 sizeof (parent)); 4453 delim = strchr(parent, '@'); 4454 if (strchr(target, '@') == NULL) 4455 *(++delim) = '\0'; 4456 else 4457 *delim = '\0'; 4458 (void) strlcat(parent, target, sizeof (parent)); 4459 target = parent; 4460 } else { 4461 /* 4462 * Make sure we're renaming within the same dataset. 4463 */ 4464 delim = strchr(target, '@'); 4465 if (strncmp(zhp->zfs_name, target, delim - target) 4466 != 0 || zhp->zfs_name[delim - target] != '@') { 4467 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4468 "snapshots must be part of same " 4469 "dataset")); 4470 return (zfs_error(hdl, EZFS_CROSSTARGET, 4471 errbuf)); 4472 } 4473 } 4474 4475 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE)) 4476 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 4477 } else { 4478 if (flags.recursive) { 4479 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4480 "recursive rename must be a snapshot")); 4481 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 4482 } 4483 4484 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE)) 4485 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 4486 4487 /* validate parents */ 4488 if (check_parents(hdl, target, NULL, B_FALSE, NULL) != 0) 4489 return (-1); 4490 4491 /* make sure we're in the same pool */ 4492 verify((delim = strchr(target, '/')) != NULL); 4493 if (strncmp(zhp->zfs_name, target, delim - target) != 0 || 4494 zhp->zfs_name[delim - target] != '/') { 4495 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4496 "datasets must be within same pool")); 4497 return (zfs_error(hdl, EZFS_CROSSTARGET, errbuf)); 4498 } 4499 4500 /* new name cannot be a child of the current dataset name */ 4501 if (is_descendant(zhp->zfs_name, target)) { 4502 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4503 "New dataset name cannot be a descendant of " 4504 "current dataset name")); 4505 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 4506 } 4507 } 4508 4509 (void) snprintf(errbuf, sizeof (errbuf), 4510 dgettext(TEXT_DOMAIN, "cannot rename '%s'"), zhp->zfs_name); 4511 4512 if (getzoneid() == GLOBAL_ZONEID && 4513 zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) { 4514 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4515 "dataset is used in a non-global zone")); 4516 return (zfs_error(hdl, EZFS_ZONED, errbuf)); 4517 } 4518 4519 /* 4520 * Avoid unmounting file systems with mountpoint property set to 4521 * 'legacy' or 'none' even if -u option is not given. 4522 */ 4523 if (zhp->zfs_type == ZFS_TYPE_FILESYSTEM && 4524 !flags.recursive && !flags.nounmount && 4525 zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, property, 4526 sizeof (property), NULL, NULL, 0, B_FALSE) == 0 && 4527 (strcmp(property, "legacy") == 0 || 4528 strcmp(property, "none") == 0)) { 4529 flags.nounmount = B_TRUE; 4530 } 4531 if (flags.recursive) { 4532 char *parentname = zfs_strdup(zhp->zfs_hdl, zhp->zfs_name); 4533 delim = strchr(parentname, '@'); 4534 *delim = '\0'; 4535 zfs_handle_t *zhrp = zfs_open(zhp->zfs_hdl, parentname, 4536 ZFS_TYPE_DATASET); 4537 free(parentname); 4538 if (zhrp == NULL) { 4539 ret = -1; 4540 goto error; 4541 } 4542 zfs_close(zhrp); 4543 } else if (zhp->zfs_type != ZFS_TYPE_SNAPSHOT) { 4544 if ((cl = changelist_gather(zhp, ZFS_PROP_NAME, 4545 flags.nounmount ? CL_GATHER_DONT_UNMOUNT : 4546 CL_GATHER_ITER_MOUNTED, 4547 flags.forceunmount ? MS_FORCE : 0)) == NULL) 4548 return (-1); 4549 4550 if (changelist_haszonedchild(cl)) { 4551 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4552 "child dataset with inherited mountpoint is used " 4553 "in a non-global zone")); 4554 (void) zfs_error(hdl, EZFS_ZONED, errbuf); 4555 ret = -1; 4556 goto error; 4557 } 4558 4559 if ((ret = changelist_prefix(cl)) != 0) 4560 goto error; 4561 } 4562 4563 if (ZFS_IS_VOLUME(zhp)) 4564 zc.zc_objset_type = DMU_OST_ZVOL; 4565 else 4566 zc.zc_objset_type = DMU_OST_ZFS; 4567 4568 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 4569 (void) strlcpy(zc.zc_value, target, sizeof (zc.zc_value)); 4570 4571 zc.zc_cookie = !!flags.recursive; 4572 zc.zc_cookie |= (!!flags.nounmount) << 1; 4573 4574 if ((ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_RENAME, &zc)) != 0) { 4575 /* 4576 * if it was recursive, the one that actually failed will 4577 * be in zc.zc_name 4578 */ 4579 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 4580 "cannot rename '%s'"), zc.zc_name); 4581 4582 if (flags.recursive && errno == EEXIST) { 4583 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4584 "a child dataset already has a snapshot " 4585 "with the new name")); 4586 (void) zfs_error(hdl, EZFS_EXISTS, errbuf); 4587 } else if (errno == EACCES) { 4588 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4589 "cannot move encrypted child outside of " 4590 "its encryption root")); 4591 (void) zfs_error(hdl, EZFS_CRYPTOFAILED, errbuf); 4592 } else { 4593 (void) zfs_standard_error(zhp->zfs_hdl, errno, errbuf); 4594 } 4595 4596 /* 4597 * On failure, we still want to remount any filesystems that 4598 * were previously mounted, so we don't alter the system state. 4599 */ 4600 if (cl != NULL) 4601 (void) changelist_postfix(cl); 4602 } else { 4603 if (cl != NULL) { 4604 changelist_rename(cl, zfs_get_name(zhp), target); 4605 ret = changelist_postfix(cl); 4606 } 4607 } 4608 4609 error: 4610 if (cl != NULL) { 4611 changelist_free(cl); 4612 } 4613 return (ret); 4614 } 4615 4616 nvlist_t * 4617 zfs_get_all_props(zfs_handle_t *zhp) 4618 { 4619 return (zhp->zfs_props); 4620 } 4621 4622 nvlist_t * 4623 zfs_get_recvd_props(zfs_handle_t *zhp) 4624 { 4625 if (zhp->zfs_recvd_props == NULL) 4626 if (get_recvd_props_ioctl(zhp) != 0) 4627 return (NULL); 4628 return (zhp->zfs_recvd_props); 4629 } 4630 4631 nvlist_t * 4632 zfs_get_user_props(zfs_handle_t *zhp) 4633 { 4634 return (zhp->zfs_user_props); 4635 } 4636 4637 /* 4638 * This function is used by 'zfs list' to determine the exact set of columns to 4639 * display, and their maximum widths. This does two main things: 4640 * 4641 * - If this is a list of all properties, then expand the list to include 4642 * all native properties, and set a flag so that for each dataset we look 4643 * for new unique user properties and add them to the list. 4644 * 4645 * - For non fixed-width properties, keep track of the maximum width seen 4646 * so that we can size the column appropriately. If the user has 4647 * requested received property values, we also need to compute the width 4648 * of the RECEIVED column. 4649 */ 4650 int 4651 zfs_expand_proplist(zfs_handle_t *zhp, zprop_list_t **plp, boolean_t received, 4652 boolean_t literal) 4653 { 4654 libzfs_handle_t *hdl = zhp->zfs_hdl; 4655 zprop_list_t *entry; 4656 zprop_list_t **last, **start; 4657 nvlist_t *userprops, *propval; 4658 nvpair_t *elem; 4659 char *strval; 4660 char buf[ZFS_MAXPROPLEN]; 4661 4662 if (zprop_expand_list(hdl, plp, ZFS_TYPE_DATASET) != 0) 4663 return (-1); 4664 4665 userprops = zfs_get_user_props(zhp); 4666 4667 entry = *plp; 4668 if (entry->pl_all && nvlist_next_nvpair(userprops, NULL) != NULL) { 4669 /* 4670 * Go through and add any user properties as necessary. We 4671 * start by incrementing our list pointer to the first 4672 * non-native property. 4673 */ 4674 start = plp; 4675 while (*start != NULL) { 4676 if ((*start)->pl_prop == ZPROP_USERPROP) 4677 break; 4678 start = &(*start)->pl_next; 4679 } 4680 4681 elem = NULL; 4682 while ((elem = nvlist_next_nvpair(userprops, elem)) != NULL) { 4683 /* 4684 * See if we've already found this property in our list. 4685 */ 4686 for (last = start; *last != NULL; 4687 last = &(*last)->pl_next) { 4688 if (strcmp((*last)->pl_user_prop, 4689 nvpair_name(elem)) == 0) 4690 break; 4691 } 4692 4693 if (*last == NULL) { 4694 entry = zfs_alloc(hdl, sizeof (zprop_list_t)); 4695 entry->pl_user_prop = 4696 zfs_strdup(hdl, nvpair_name(elem)); 4697 entry->pl_prop = ZPROP_USERPROP; 4698 entry->pl_width = strlen(nvpair_name(elem)); 4699 entry->pl_all = B_TRUE; 4700 *last = entry; 4701 } 4702 } 4703 } 4704 4705 /* 4706 * Now go through and check the width of any non-fixed columns 4707 */ 4708 for (entry = *plp; entry != NULL; entry = entry->pl_next) { 4709 if (entry->pl_fixed && !literal) 4710 continue; 4711 4712 if (entry->pl_prop != ZPROP_USERPROP) { 4713 if (zfs_prop_get(zhp, entry->pl_prop, 4714 buf, sizeof (buf), NULL, NULL, 0, literal) == 0) { 4715 if (strlen(buf) > entry->pl_width) 4716 entry->pl_width = strlen(buf); 4717 } 4718 if (received && zfs_prop_get_recvd(zhp, 4719 zfs_prop_to_name(entry->pl_prop), 4720 buf, sizeof (buf), literal) == 0) 4721 if (strlen(buf) > entry->pl_recvd_width) 4722 entry->pl_recvd_width = strlen(buf); 4723 } else { 4724 if (nvlist_lookup_nvlist(userprops, entry->pl_user_prop, 4725 &propval) == 0) { 4726 strval = fnvlist_lookup_string(propval, 4727 ZPROP_VALUE); 4728 if (strlen(strval) > entry->pl_width) 4729 entry->pl_width = strlen(strval); 4730 } 4731 if (received && zfs_prop_get_recvd(zhp, 4732 entry->pl_user_prop, 4733 buf, sizeof (buf), literal) == 0) 4734 if (strlen(buf) > entry->pl_recvd_width) 4735 entry->pl_recvd_width = strlen(buf); 4736 } 4737 } 4738 4739 return (0); 4740 } 4741 4742 void 4743 zfs_prune_proplist(zfs_handle_t *zhp, uint8_t *props) 4744 { 4745 nvpair_t *curr; 4746 nvpair_t *next; 4747 4748 /* 4749 * Keep a reference to the props-table against which we prune the 4750 * properties. 4751 */ 4752 zhp->zfs_props_table = props; 4753 4754 curr = nvlist_next_nvpair(zhp->zfs_props, NULL); 4755 4756 while (curr) { 4757 zfs_prop_t zfs_prop = zfs_name_to_prop(nvpair_name(curr)); 4758 next = nvlist_next_nvpair(zhp->zfs_props, curr); 4759 4760 /* 4761 * User properties will result in ZPROP_USERPROP (an alias 4762 * for ZPROP_INVAL), and since we 4763 * only know how to prune standard ZFS properties, we always 4764 * leave these in the list. This can also happen if we 4765 * encounter an unknown DSL property (when running older 4766 * software, for example). 4767 */ 4768 if (zfs_prop != ZPROP_USERPROP && props[zfs_prop] == B_FALSE) 4769 (void) nvlist_remove(zhp->zfs_props, 4770 nvpair_name(curr), nvpair_type(curr)); 4771 curr = next; 4772 } 4773 } 4774 4775 static int 4776 zfs_smb_acl_mgmt(libzfs_handle_t *hdl, char *dataset, char *path, 4777 zfs_smb_acl_op_t cmd, char *resource1, char *resource2) 4778 { 4779 zfs_cmd_t zc = {"\0"}; 4780 nvlist_t *nvlist = NULL; 4781 int error; 4782 4783 (void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name)); 4784 (void) strlcpy(zc.zc_value, path, sizeof (zc.zc_value)); 4785 zc.zc_cookie = (uint64_t)cmd; 4786 4787 if (cmd == ZFS_SMB_ACL_RENAME) { 4788 if (nvlist_alloc(&nvlist, NV_UNIQUE_NAME, 0) != 0) { 4789 (void) no_memory(hdl); 4790 return (0); 4791 } 4792 } 4793 4794 switch (cmd) { 4795 case ZFS_SMB_ACL_ADD: 4796 case ZFS_SMB_ACL_REMOVE: 4797 (void) strlcpy(zc.zc_string, resource1, sizeof (zc.zc_string)); 4798 break; 4799 case ZFS_SMB_ACL_RENAME: 4800 if (nvlist_add_string(nvlist, ZFS_SMB_ACL_SRC, 4801 resource1) != 0) { 4802 (void) no_memory(hdl); 4803 return (-1); 4804 } 4805 if (nvlist_add_string(nvlist, ZFS_SMB_ACL_TARGET, 4806 resource2) != 0) { 4807 (void) no_memory(hdl); 4808 return (-1); 4809 } 4810 zcmd_write_src_nvlist(hdl, &zc, nvlist); 4811 break; 4812 case ZFS_SMB_ACL_PURGE: 4813 break; 4814 default: 4815 return (-1); 4816 } 4817 error = ioctl(hdl->libzfs_fd, ZFS_IOC_SMB_ACL, &zc); 4818 nvlist_free(nvlist); 4819 return (error); 4820 } 4821 4822 int 4823 zfs_smb_acl_add(libzfs_handle_t *hdl, char *dataset, 4824 char *path, char *resource) 4825 { 4826 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_ADD, 4827 resource, NULL)); 4828 } 4829 4830 int 4831 zfs_smb_acl_remove(libzfs_handle_t *hdl, char *dataset, 4832 char *path, char *resource) 4833 { 4834 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_REMOVE, 4835 resource, NULL)); 4836 } 4837 4838 int 4839 zfs_smb_acl_purge(libzfs_handle_t *hdl, char *dataset, char *path) 4840 { 4841 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_PURGE, 4842 NULL, NULL)); 4843 } 4844 4845 int 4846 zfs_smb_acl_rename(libzfs_handle_t *hdl, char *dataset, char *path, 4847 char *oldname, char *newname) 4848 { 4849 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_RENAME, 4850 oldname, newname)); 4851 } 4852 4853 int 4854 zfs_userspace(zfs_handle_t *zhp, zfs_userquota_prop_t type, 4855 zfs_userspace_cb_t func, void *arg) 4856 { 4857 zfs_cmd_t zc = {"\0"}; 4858 zfs_useracct_t buf[100]; 4859 libzfs_handle_t *hdl = zhp->zfs_hdl; 4860 int ret; 4861 4862 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 4863 4864 zc.zc_objset_type = type; 4865 zc.zc_nvlist_dst = (uintptr_t)buf; 4866 4867 for (;;) { 4868 zfs_useracct_t *zua = buf; 4869 4870 zc.zc_nvlist_dst_size = sizeof (buf); 4871 if (zfs_ioctl(hdl, ZFS_IOC_USERSPACE_MANY, &zc) != 0) { 4872 if ((errno == ENOTSUP && 4873 (type == ZFS_PROP_USEROBJUSED || 4874 type == ZFS_PROP_GROUPOBJUSED || 4875 type == ZFS_PROP_USEROBJQUOTA || 4876 type == ZFS_PROP_GROUPOBJQUOTA || 4877 type == ZFS_PROP_PROJECTOBJUSED || 4878 type == ZFS_PROP_PROJECTOBJQUOTA || 4879 type == ZFS_PROP_PROJECTUSED || 4880 type == ZFS_PROP_PROJECTQUOTA))) 4881 break; 4882 4883 return (zfs_standard_error_fmt(hdl, errno, 4884 dgettext(TEXT_DOMAIN, 4885 "cannot get used/quota for %s"), zc.zc_name)); 4886 } 4887 if (zc.zc_nvlist_dst_size == 0) 4888 break; 4889 4890 while (zc.zc_nvlist_dst_size > 0) { 4891 if ((ret = func(arg, zua->zu_domain, zua->zu_rid, 4892 zua->zu_space)) != 0) 4893 return (ret); 4894 zua++; 4895 zc.zc_nvlist_dst_size -= sizeof (zfs_useracct_t); 4896 } 4897 } 4898 4899 return (0); 4900 } 4901 4902 struct holdarg { 4903 nvlist_t *nvl; 4904 const char *snapname; 4905 const char *tag; 4906 boolean_t recursive; 4907 int error; 4908 }; 4909 4910 static int 4911 zfs_hold_one(zfs_handle_t *zhp, void *arg) 4912 { 4913 struct holdarg *ha = arg; 4914 char name[ZFS_MAX_DATASET_NAME_LEN]; 4915 int rv = 0; 4916 4917 if (snprintf(name, sizeof (name), "%s@%s", zhp->zfs_name, 4918 ha->snapname) >= sizeof (name)) 4919 return (EINVAL); 4920 4921 if (lzc_exists(name)) 4922 fnvlist_add_string(ha->nvl, name, ha->tag); 4923 4924 if (ha->recursive) 4925 rv = zfs_iter_filesystems(zhp, zfs_hold_one, ha); 4926 zfs_close(zhp); 4927 return (rv); 4928 } 4929 4930 int 4931 zfs_hold(zfs_handle_t *zhp, const char *snapname, const char *tag, 4932 boolean_t recursive, int cleanup_fd) 4933 { 4934 int ret; 4935 struct holdarg ha; 4936 4937 ha.nvl = fnvlist_alloc(); 4938 ha.snapname = snapname; 4939 ha.tag = tag; 4940 ha.recursive = recursive; 4941 (void) zfs_hold_one(zfs_handle_dup(zhp), &ha); 4942 4943 if (nvlist_empty(ha.nvl)) { 4944 char errbuf[ERRBUFLEN]; 4945 4946 fnvlist_free(ha.nvl); 4947 ret = ENOENT; 4948 (void) snprintf(errbuf, sizeof (errbuf), 4949 dgettext(TEXT_DOMAIN, 4950 "cannot hold snapshot '%s@%s'"), 4951 zhp->zfs_name, snapname); 4952 (void) zfs_standard_error(zhp->zfs_hdl, ret, errbuf); 4953 return (ret); 4954 } 4955 4956 ret = zfs_hold_nvl(zhp, cleanup_fd, ha.nvl); 4957 fnvlist_free(ha.nvl); 4958 4959 return (ret); 4960 } 4961 4962 int 4963 zfs_hold_nvl(zfs_handle_t *zhp, int cleanup_fd, nvlist_t *holds) 4964 { 4965 int ret; 4966 nvlist_t *errors; 4967 libzfs_handle_t *hdl = zhp->zfs_hdl; 4968 char errbuf[ERRBUFLEN]; 4969 nvpair_t *elem; 4970 4971 errors = NULL; 4972 ret = lzc_hold(holds, cleanup_fd, &errors); 4973 4974 if (ret == 0) { 4975 /* There may be errors even in the success case. */ 4976 fnvlist_free(errors); 4977 return (0); 4978 } 4979 4980 if (nvlist_empty(errors)) { 4981 /* no hold-specific errors */ 4982 (void) snprintf(errbuf, sizeof (errbuf), 4983 dgettext(TEXT_DOMAIN, "cannot hold")); 4984 switch (ret) { 4985 case ENOTSUP: 4986 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4987 "pool must be upgraded")); 4988 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf); 4989 break; 4990 case EINVAL: 4991 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf); 4992 break; 4993 default: 4994 (void) zfs_standard_error(hdl, ret, errbuf); 4995 } 4996 } 4997 4998 for (elem = nvlist_next_nvpair(errors, NULL); 4999 elem != NULL; 5000 elem = nvlist_next_nvpair(errors, elem)) { 5001 (void) snprintf(errbuf, sizeof (errbuf), 5002 dgettext(TEXT_DOMAIN, 5003 "cannot hold snapshot '%s'"), nvpair_name(elem)); 5004 switch (fnvpair_value_int32(elem)) { 5005 case E2BIG: 5006 /* 5007 * Temporary tags wind up having the ds object id 5008 * prepended. So even if we passed the length check 5009 * above, it's still possible for the tag to wind 5010 * up being slightly too long. 5011 */ 5012 (void) zfs_error(hdl, EZFS_TAGTOOLONG, errbuf); 5013 break; 5014 case EINVAL: 5015 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf); 5016 break; 5017 case EEXIST: 5018 (void) zfs_error(hdl, EZFS_REFTAG_HOLD, errbuf); 5019 break; 5020 default: 5021 (void) zfs_standard_error(hdl, 5022 fnvpair_value_int32(elem), errbuf); 5023 } 5024 } 5025 5026 fnvlist_free(errors); 5027 return (ret); 5028 } 5029 5030 static int 5031 zfs_release_one(zfs_handle_t *zhp, void *arg) 5032 { 5033 struct holdarg *ha = arg; 5034 char name[ZFS_MAX_DATASET_NAME_LEN]; 5035 int rv = 0; 5036 nvlist_t *existing_holds; 5037 5038 if (snprintf(name, sizeof (name), "%s@%s", zhp->zfs_name, 5039 ha->snapname) >= sizeof (name)) { 5040 ha->error = EINVAL; 5041 rv = EINVAL; 5042 } 5043 5044 if (lzc_get_holds(name, &existing_holds) != 0) { 5045 ha->error = ENOENT; 5046 } else if (!nvlist_exists(existing_holds, ha->tag)) { 5047 ha->error = ESRCH; 5048 } else { 5049 nvlist_t *torelease = fnvlist_alloc(); 5050 fnvlist_add_boolean(torelease, ha->tag); 5051 fnvlist_add_nvlist(ha->nvl, name, torelease); 5052 fnvlist_free(torelease); 5053 } 5054 5055 if (ha->recursive) 5056 rv = zfs_iter_filesystems(zhp, zfs_release_one, ha); 5057 zfs_close(zhp); 5058 return (rv); 5059 } 5060 5061 int 5062 zfs_release(zfs_handle_t *zhp, const char *snapname, const char *tag, 5063 boolean_t recursive) 5064 { 5065 int ret; 5066 struct holdarg ha; 5067 nvlist_t *errors = NULL; 5068 nvpair_t *elem; 5069 libzfs_handle_t *hdl = zhp->zfs_hdl; 5070 char errbuf[ERRBUFLEN]; 5071 5072 ha.nvl = fnvlist_alloc(); 5073 ha.snapname = snapname; 5074 ha.tag = tag; 5075 ha.recursive = recursive; 5076 ha.error = 0; 5077 (void) zfs_release_one(zfs_handle_dup(zhp), &ha); 5078 5079 if (nvlist_empty(ha.nvl)) { 5080 fnvlist_free(ha.nvl); 5081 ret = ha.error; 5082 (void) snprintf(errbuf, sizeof (errbuf), 5083 dgettext(TEXT_DOMAIN, 5084 "cannot release hold from snapshot '%s@%s'"), 5085 zhp->zfs_name, snapname); 5086 if (ret == ESRCH) { 5087 (void) zfs_error(hdl, EZFS_REFTAG_RELE, errbuf); 5088 } else { 5089 (void) zfs_standard_error(hdl, ret, errbuf); 5090 } 5091 return (ret); 5092 } 5093 5094 ret = lzc_release(ha.nvl, &errors); 5095 fnvlist_free(ha.nvl); 5096 5097 if (ret == 0) { 5098 /* There may be errors even in the success case. */ 5099 fnvlist_free(errors); 5100 return (0); 5101 } 5102 5103 if (nvlist_empty(errors)) { 5104 /* no hold-specific errors */ 5105 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 5106 "cannot release")); 5107 switch (errno) { 5108 case ENOTSUP: 5109 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 5110 "pool must be upgraded")); 5111 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf); 5112 break; 5113 default: 5114 (void) zfs_standard_error(hdl, errno, errbuf); 5115 } 5116 } 5117 5118 for (elem = nvlist_next_nvpair(errors, NULL); 5119 elem != NULL; 5120 elem = nvlist_next_nvpair(errors, elem)) { 5121 (void) snprintf(errbuf, sizeof (errbuf), 5122 dgettext(TEXT_DOMAIN, 5123 "cannot release hold from snapshot '%s'"), 5124 nvpair_name(elem)); 5125 switch (fnvpair_value_int32(elem)) { 5126 case ESRCH: 5127 (void) zfs_error(hdl, EZFS_REFTAG_RELE, errbuf); 5128 break; 5129 case EINVAL: 5130 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf); 5131 break; 5132 default: 5133 (void) zfs_standard_error(hdl, 5134 fnvpair_value_int32(elem), errbuf); 5135 } 5136 } 5137 5138 fnvlist_free(errors); 5139 return (ret); 5140 } 5141 5142 int 5143 zfs_get_fsacl(zfs_handle_t *zhp, nvlist_t **nvl) 5144 { 5145 zfs_cmd_t zc = {"\0"}; 5146 libzfs_handle_t *hdl = zhp->zfs_hdl; 5147 int nvsz = 2048; 5148 void *nvbuf; 5149 int err = 0; 5150 char errbuf[ERRBUFLEN]; 5151 5152 assert(zhp->zfs_type == ZFS_TYPE_VOLUME || 5153 zhp->zfs_type == ZFS_TYPE_FILESYSTEM); 5154 5155 tryagain: 5156 5157 nvbuf = malloc(nvsz); 5158 if (nvbuf == NULL) { 5159 err = (zfs_error(hdl, EZFS_NOMEM, strerror(errno))); 5160 goto out; 5161 } 5162 5163 zc.zc_nvlist_dst_size = nvsz; 5164 zc.zc_nvlist_dst = (uintptr_t)nvbuf; 5165 5166 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 5167 5168 if (zfs_ioctl(hdl, ZFS_IOC_GET_FSACL, &zc) != 0) { 5169 (void) snprintf(errbuf, sizeof (errbuf), 5170 dgettext(TEXT_DOMAIN, "cannot get permissions on '%s'"), 5171 zc.zc_name); 5172 switch (errno) { 5173 case ENOMEM: 5174 free(nvbuf); 5175 nvsz = zc.zc_nvlist_dst_size; 5176 goto tryagain; 5177 5178 case ENOTSUP: 5179 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 5180 "pool must be upgraded")); 5181 err = zfs_error(hdl, EZFS_BADVERSION, errbuf); 5182 break; 5183 case EINVAL: 5184 err = zfs_error(hdl, EZFS_BADTYPE, errbuf); 5185 break; 5186 case ENOENT: 5187 err = zfs_error(hdl, EZFS_NOENT, errbuf); 5188 break; 5189 default: 5190 err = zfs_standard_error(hdl, errno, errbuf); 5191 break; 5192 } 5193 } else { 5194 /* success */ 5195 int rc = nvlist_unpack(nvbuf, zc.zc_nvlist_dst_size, nvl, 0); 5196 if (rc) { 5197 err = zfs_standard_error_fmt(hdl, rc, dgettext( 5198 TEXT_DOMAIN, "cannot get permissions on '%s'"), 5199 zc.zc_name); 5200 } 5201 } 5202 5203 free(nvbuf); 5204 out: 5205 return (err); 5206 } 5207 5208 int 5209 zfs_set_fsacl(zfs_handle_t *zhp, boolean_t un, nvlist_t *nvl) 5210 { 5211 zfs_cmd_t zc = {"\0"}; 5212 libzfs_handle_t *hdl = zhp->zfs_hdl; 5213 char *nvbuf; 5214 char errbuf[ERRBUFLEN]; 5215 size_t nvsz; 5216 int err; 5217 5218 assert(zhp->zfs_type == ZFS_TYPE_VOLUME || 5219 zhp->zfs_type == ZFS_TYPE_FILESYSTEM); 5220 5221 err = nvlist_size(nvl, &nvsz, NV_ENCODE_NATIVE); 5222 assert(err == 0); 5223 5224 nvbuf = malloc(nvsz); 5225 5226 err = nvlist_pack(nvl, &nvbuf, &nvsz, NV_ENCODE_NATIVE, 0); 5227 assert(err == 0); 5228 5229 zc.zc_nvlist_src_size = nvsz; 5230 zc.zc_nvlist_src = (uintptr_t)nvbuf; 5231 zc.zc_perm_action = un; 5232 5233 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 5234 5235 if (zfs_ioctl(hdl, ZFS_IOC_SET_FSACL, &zc) != 0) { 5236 (void) snprintf(errbuf, sizeof (errbuf), 5237 dgettext(TEXT_DOMAIN, "cannot set permissions on '%s'"), 5238 zc.zc_name); 5239 switch (errno) { 5240 case ENOTSUP: 5241 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 5242 "pool must be upgraded")); 5243 err = zfs_error(hdl, EZFS_BADVERSION, errbuf); 5244 break; 5245 case EINVAL: 5246 err = zfs_error(hdl, EZFS_BADTYPE, errbuf); 5247 break; 5248 case ENOENT: 5249 err = zfs_error(hdl, EZFS_NOENT, errbuf); 5250 break; 5251 default: 5252 err = zfs_standard_error(hdl, errno, errbuf); 5253 break; 5254 } 5255 } 5256 5257 free(nvbuf); 5258 5259 return (err); 5260 } 5261 5262 int 5263 zfs_get_holds(zfs_handle_t *zhp, nvlist_t **nvl) 5264 { 5265 int err; 5266 char errbuf[ERRBUFLEN]; 5267 5268 err = lzc_get_holds(zhp->zfs_name, nvl); 5269 5270 if (err != 0) { 5271 libzfs_handle_t *hdl = zhp->zfs_hdl; 5272 5273 (void) snprintf(errbuf, sizeof (errbuf), 5274 dgettext(TEXT_DOMAIN, "cannot get holds for '%s'"), 5275 zhp->zfs_name); 5276 switch (err) { 5277 case ENOTSUP: 5278 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 5279 "pool must be upgraded")); 5280 err = zfs_error(hdl, EZFS_BADVERSION, errbuf); 5281 break; 5282 case EINVAL: 5283 err = zfs_error(hdl, EZFS_BADTYPE, errbuf); 5284 break; 5285 case ENOENT: 5286 err = zfs_error(hdl, EZFS_NOENT, errbuf); 5287 break; 5288 default: 5289 err = zfs_standard_error(hdl, errno, errbuf); 5290 break; 5291 } 5292 } 5293 5294 return (err); 5295 } 5296 5297 /* 5298 * The theory of raidz space accounting 5299 * 5300 * The "referenced" property of RAIDZ vdevs is scaled such that a 128KB block 5301 * will "reference" 128KB, even though it allocates more than that, to store the 5302 * parity information (and perhaps skip sectors). This concept of the 5303 * "referenced" (and other DMU space accounting) being lower than the allocated 5304 * space by a constant factor is called "raidz deflation." 5305 * 5306 * As mentioned above, the constant factor for raidz deflation assumes a 128KB 5307 * block size. However, zvols typically have a much smaller block size (default 5308 * 8KB). These smaller blocks may require proportionally much more parity 5309 * information (and perhaps skip sectors). In this case, the change to the 5310 * "referenced" property may be much more than the logical block size. 5311 * 5312 * Suppose a raidz vdev has 5 disks with ashift=12. A 128k block may be written 5313 * as follows. 5314 * 5315 * +-------+-------+-------+-------+-------+ 5316 * | disk1 | disk2 | disk3 | disk4 | disk5 | 5317 * +-------+-------+-------+-------+-------+ 5318 * | P0 | D0 | D8 | D16 | D24 | 5319 * | P1 | D1 | D9 | D17 | D25 | 5320 * | P2 | D2 | D10 | D18 | D26 | 5321 * | P3 | D3 | D11 | D19 | D27 | 5322 * | P4 | D4 | D12 | D20 | D28 | 5323 * | P5 | D5 | D13 | D21 | D29 | 5324 * | P6 | D6 | D14 | D22 | D30 | 5325 * | P7 | D7 | D15 | D23 | D31 | 5326 * +-------+-------+-------+-------+-------+ 5327 * 5328 * Above, notice that 160k was allocated: 8 x 4k parity sectors + 32 x 4k data 5329 * sectors. The dataset's referenced will increase by 128k and the pool's 5330 * allocated and free properties will be adjusted by 160k. 5331 * 5332 * A 4k block written to the same raidz vdev will require two 4k sectors. The 5333 * blank cells represent unallocated space. 5334 * 5335 * +-------+-------+-------+-------+-------+ 5336 * | disk1 | disk2 | disk3 | disk4 | disk5 | 5337 * +-------+-------+-------+-------+-------+ 5338 * | P0 | D0 | | | | 5339 * +-------+-------+-------+-------+-------+ 5340 * 5341 * Above, notice that the 4k block required one sector for parity and another 5342 * for data. vdev_raidz_asize() will return 8k and as such the pool's allocated 5343 * and free properties will be adjusted by 8k. The dataset will not be charged 5344 * 8k. Rather, it will be charged a value that is scaled according to the 5345 * overhead of the 128k block on the same vdev. This 8k allocation will be 5346 * charged 8k * 128k / 160k. 128k is from SPA_OLD_MAXBLOCKSIZE and 160k is as 5347 * calculated in the 128k block example above. 5348 * 5349 * Every raidz allocation is sized to be a multiple of nparity+1 sectors. That 5350 * is, every raidz1 allocation will be a multiple of 2 sectors, raidz2 5351 * allocations are a multiple of 3 sectors, and raidz3 allocations are a 5352 * multiple of of 4 sectors. When a block does not fill the required number of 5353 * sectors, skip blocks (sectors) are used. 5354 * 5355 * An 8k block being written to a raidz vdev may be written as follows: 5356 * 5357 * +-------+-------+-------+-------+-------+ 5358 * | disk1 | disk2 | disk3 | disk4 | disk5 | 5359 * +-------+-------+-------+-------+-------+ 5360 * | P0 | D0 | D1 | S0 | | 5361 * +-------+-------+-------+-------+-------+ 5362 * 5363 * In order to maintain the nparity+1 allocation size, a skip block (S0) was 5364 * added. For this 8k block, the pool's allocated and free properties are 5365 * adjusted by 16k and the dataset's referenced is increased by 16k * 128k / 5366 * 160k. Again, 128k is from SPA_OLD_MAXBLOCKSIZE and 160k is as calculated in 5367 * the 128k block example above. 5368 * 5369 * The situation is slightly different for dRAID since the minimum allocation 5370 * size is the full group width. The same 8K block above would be written as 5371 * follows in a dRAID group: 5372 * 5373 * +-------+-------+-------+-------+-------+ 5374 * | disk1 | disk2 | disk3 | disk4 | disk5 | 5375 * +-------+-------+-------+-------+-------+ 5376 * | P0 | D0 | D1 | S0 | S1 | 5377 * +-------+-------+-------+-------+-------+ 5378 * 5379 * Compression may lead to a variety of block sizes being written for the same 5380 * volume or file. There is no clear way to reserve just the amount of space 5381 * that will be required, so the worst case (no compression) is assumed. 5382 * Note that metadata blocks will typically be compressed, so the reservation 5383 * size returned by zvol_volsize_to_reservation() will generally be slightly 5384 * larger than the maximum that the volume can reference. 5385 */ 5386 5387 /* 5388 * Derived from function of same name in module/zfs/vdev_raidz.c. Returns the 5389 * amount of space (in bytes) that will be allocated for the specified block 5390 * size. Note that the "referenced" space accounted will be less than this, but 5391 * not necessarily equal to "blksize", due to RAIDZ deflation. 5392 */ 5393 static uint64_t 5394 vdev_raidz_asize(uint64_t ndisks, uint64_t nparity, uint64_t ashift, 5395 uint64_t blksize) 5396 { 5397 uint64_t asize, ndata; 5398 5399 ASSERT3U(ndisks, >, nparity); 5400 ndata = ndisks - nparity; 5401 asize = ((blksize - 1) >> ashift) + 1; 5402 asize += nparity * ((asize + ndata - 1) / ndata); 5403 asize = roundup(asize, nparity + 1) << ashift; 5404 5405 return (asize); 5406 } 5407 5408 /* 5409 * Derived from function of same name in module/zfs/vdev_draid.c. Returns the 5410 * amount of space (in bytes) that will be allocated for the specified block 5411 * size. 5412 */ 5413 static uint64_t 5414 vdev_draid_asize(uint64_t ndisks, uint64_t nparity, uint64_t ashift, 5415 uint64_t blksize) 5416 { 5417 ASSERT3U(ndisks, >, nparity); 5418 uint64_t ndata = ndisks - nparity; 5419 uint64_t rows = ((blksize - 1) / (ndata << ashift)) + 1; 5420 uint64_t asize = (rows * ndisks) << ashift; 5421 5422 return (asize); 5423 } 5424 5425 /* 5426 * Determine how much space will be allocated if it lands on the most space- 5427 * inefficient top-level vdev. Returns the size in bytes required to store one 5428 * copy of the volume data. See theory comment above. 5429 */ 5430 static uint64_t 5431 volsize_from_vdevs(zpool_handle_t *zhp, uint64_t nblocks, uint64_t blksize) 5432 { 5433 nvlist_t *config, *tree, **vdevs; 5434 uint_t nvdevs; 5435 uint64_t ret = 0; 5436 5437 config = zpool_get_config(zhp, NULL); 5438 if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, &tree) != 0 || 5439 nvlist_lookup_nvlist_array(tree, ZPOOL_CONFIG_CHILDREN, 5440 &vdevs, &nvdevs) != 0) { 5441 return (nblocks * blksize); 5442 } 5443 5444 for (int v = 0; v < nvdevs; v++) { 5445 char *type; 5446 uint64_t nparity, ashift, asize, tsize; 5447 uint64_t volsize; 5448 5449 if (nvlist_lookup_string(vdevs[v], ZPOOL_CONFIG_TYPE, 5450 &type) != 0) 5451 continue; 5452 5453 if (strcmp(type, VDEV_TYPE_RAIDZ) != 0 && 5454 strcmp(type, VDEV_TYPE_DRAID) != 0) 5455 continue; 5456 5457 if (nvlist_lookup_uint64(vdevs[v], 5458 ZPOOL_CONFIG_NPARITY, &nparity) != 0) 5459 continue; 5460 5461 if (nvlist_lookup_uint64(vdevs[v], 5462 ZPOOL_CONFIG_ASHIFT, &ashift) != 0) 5463 continue; 5464 5465 if (strcmp(type, VDEV_TYPE_RAIDZ) == 0) { 5466 nvlist_t **disks; 5467 uint_t ndisks; 5468 5469 if (nvlist_lookup_nvlist_array(vdevs[v], 5470 ZPOOL_CONFIG_CHILDREN, &disks, &ndisks) != 0) 5471 continue; 5472 5473 /* allocation size for the "typical" 128k block */ 5474 tsize = vdev_raidz_asize(ndisks, nparity, ashift, 5475 SPA_OLD_MAXBLOCKSIZE); 5476 5477 /* allocation size for the blksize block */ 5478 asize = vdev_raidz_asize(ndisks, nparity, ashift, 5479 blksize); 5480 } else { 5481 uint64_t ndata; 5482 5483 if (nvlist_lookup_uint64(vdevs[v], 5484 ZPOOL_CONFIG_DRAID_NDATA, &ndata) != 0) 5485 continue; 5486 5487 /* allocation size for the "typical" 128k block */ 5488 tsize = vdev_draid_asize(ndata + nparity, nparity, 5489 ashift, SPA_OLD_MAXBLOCKSIZE); 5490 5491 /* allocation size for the blksize block */ 5492 asize = vdev_draid_asize(ndata + nparity, nparity, 5493 ashift, blksize); 5494 } 5495 5496 /* 5497 * Scale this size down as a ratio of 128k / tsize. 5498 * See theory statement above. 5499 */ 5500 volsize = nblocks * asize * SPA_OLD_MAXBLOCKSIZE / tsize; 5501 if (volsize > ret) { 5502 ret = volsize; 5503 } 5504 } 5505 5506 if (ret == 0) { 5507 ret = nblocks * blksize; 5508 } 5509 5510 return (ret); 5511 } 5512 5513 /* 5514 * Convert the zvol's volume size to an appropriate reservation. See theory 5515 * comment above. 5516 * 5517 * Note: If this routine is updated, it is necessary to update the ZFS test 5518 * suite's shell version in reservation.shlib. 5519 */ 5520 uint64_t 5521 zvol_volsize_to_reservation(zpool_handle_t *zph, uint64_t volsize, 5522 nvlist_t *props) 5523 { 5524 uint64_t numdb; 5525 uint64_t nblocks, volblocksize; 5526 int ncopies; 5527 char *strval; 5528 5529 if (nvlist_lookup_string(props, 5530 zfs_prop_to_name(ZFS_PROP_COPIES), &strval) == 0) 5531 ncopies = atoi(strval); 5532 else 5533 ncopies = 1; 5534 if (nvlist_lookup_uint64(props, 5535 zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE), 5536 &volblocksize) != 0) 5537 volblocksize = ZVOL_DEFAULT_BLOCKSIZE; 5538 5539 nblocks = volsize / volblocksize; 5540 /* 5541 * Metadata defaults to using 128k blocks, not volblocksize blocks. For 5542 * this reason, only the data blocks are scaled based on vdev config. 5543 */ 5544 volsize = volsize_from_vdevs(zph, nblocks, volblocksize); 5545 5546 /* start with metadnode L0-L6 */ 5547 numdb = 7; 5548 /* calculate number of indirects */ 5549 while (nblocks > 1) { 5550 nblocks += DNODES_PER_LEVEL - 1; 5551 nblocks /= DNODES_PER_LEVEL; 5552 numdb += nblocks; 5553 } 5554 numdb *= MIN(SPA_DVAS_PER_BP, ncopies + 1); 5555 volsize *= ncopies; 5556 /* 5557 * this is exactly DN_MAX_INDBLKSHIFT when metadata isn't 5558 * compressed, but in practice they compress down to about 5559 * 1100 bytes 5560 */ 5561 numdb *= 1ULL << DN_MAX_INDBLKSHIFT; 5562 volsize += numdb; 5563 return (volsize); 5564 } 5565 5566 /* 5567 * Wait for the given activity and return the status of the wait (whether or not 5568 * any waiting was done) in the 'waited' parameter. Non-existent fses are 5569 * reported via the 'missing' parameter, rather than by printing an error 5570 * message. This is convenient when this function is called in a loop over a 5571 * long period of time (as it is, for example, by zfs's wait cmd). In that 5572 * scenario, a fs being exported or destroyed should be considered a normal 5573 * event, so we don't want to print an error when we find that the fs doesn't 5574 * exist. 5575 */ 5576 int 5577 zfs_wait_status(zfs_handle_t *zhp, zfs_wait_activity_t activity, 5578 boolean_t *missing, boolean_t *waited) 5579 { 5580 int error = lzc_wait_fs(zhp->zfs_name, activity, waited); 5581 *missing = (error == ENOENT); 5582 if (*missing) 5583 return (0); 5584 5585 if (error != 0) { 5586 (void) zfs_standard_error_fmt(zhp->zfs_hdl, error, 5587 dgettext(TEXT_DOMAIN, "error waiting in fs '%s'"), 5588 zhp->zfs_name); 5589 } 5590 5591 return (error); 5592 } 5593