1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 24 * Copyright (c) 2018, Joyent, Inc. All rights reserved. 25 * Copyright (c) 2011, 2016 by Delphix. All rights reserved. 26 * Copyright (c) 2012 DEY Storage Systems, Inc. All rights reserved. 27 * Copyright (c) 2011-2012 Pawel Jakub Dawidek. All rights reserved. 28 * Copyright (c) 2013 Martin Matuska. All rights reserved. 29 * Copyright (c) 2013 Steven Hartland. All rights reserved. 30 * Copyright (c) 2014 Integros [integros.com] 31 * Copyright 2017 Nexenta Systems, Inc. 32 * Copyright 2016 Igor Kozhukhov <ikozhukhov@gmail.com> 33 * Copyright 2017 RackTop Systems. 34 */ 35 36 #include <ctype.h> 37 #include <errno.h> 38 #include <libintl.h> 39 #include <math.h> 40 #include <stdio.h> 41 #include <stdlib.h> 42 #include <strings.h> 43 #include <unistd.h> 44 #include <stddef.h> 45 #include <zone.h> 46 #include <fcntl.h> 47 #include <sys/mntent.h> 48 #include <sys/mount.h> 49 #include <priv.h> 50 #include <pwd.h> 51 #include <grp.h> 52 #include <stddef.h> 53 #include <ucred.h> 54 #include <idmap.h> 55 #include <aclutils.h> 56 #include <directory.h> 57 #include <time.h> 58 59 #include <sys/dnode.h> 60 #include <sys/spa.h> 61 #include <sys/zap.h> 62 #include <libzfs.h> 63 64 #include "zfs_namecheck.h" 65 #include "zfs_prop.h" 66 #include "libzfs_impl.h" 67 #include "zfs_deleg.h" 68 69 static int userquota_propname_decode(const char *propname, boolean_t zoned, 70 zfs_userquota_prop_t *typep, char *domain, int domainlen, uint64_t *ridp); 71 72 /* 73 * Given a single type (not a mask of types), return the type in a human 74 * readable form. 75 */ 76 const char * 77 zfs_type_to_name(zfs_type_t type) 78 { 79 switch (type) { 80 case ZFS_TYPE_FILESYSTEM: 81 return (dgettext(TEXT_DOMAIN, "filesystem")); 82 case ZFS_TYPE_SNAPSHOT: 83 return (dgettext(TEXT_DOMAIN, "snapshot")); 84 case ZFS_TYPE_VOLUME: 85 return (dgettext(TEXT_DOMAIN, "volume")); 86 case ZFS_TYPE_POOL: 87 return (dgettext(TEXT_DOMAIN, "pool")); 88 case ZFS_TYPE_BOOKMARK: 89 return (dgettext(TEXT_DOMAIN, "bookmark")); 90 default: 91 assert(!"unhandled zfs_type_t"); 92 } 93 94 return (NULL); 95 } 96 97 /* 98 * Validate a ZFS path. This is used even before trying to open the dataset, to 99 * provide a more meaningful error message. We call zfs_error_aux() to 100 * explain exactly why the name was not valid. 101 */ 102 int 103 zfs_validate_name(libzfs_handle_t *hdl, const char *path, int type, 104 boolean_t modifying) 105 { 106 namecheck_err_t why; 107 char what; 108 109 if (entity_namecheck(path, &why, &what) != 0) { 110 if (hdl != NULL) { 111 switch (why) { 112 case NAME_ERR_TOOLONG: 113 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 114 "name is too long")); 115 break; 116 117 case NAME_ERR_LEADING_SLASH: 118 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 119 "leading slash in name")); 120 break; 121 122 case NAME_ERR_EMPTY_COMPONENT: 123 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 124 "empty component in name")); 125 break; 126 127 case NAME_ERR_TRAILING_SLASH: 128 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 129 "trailing slash in name")); 130 break; 131 132 case NAME_ERR_INVALCHAR: 133 zfs_error_aux(hdl, 134 dgettext(TEXT_DOMAIN, "invalid character " 135 "'%c' in name"), what); 136 break; 137 138 case NAME_ERR_MULTIPLE_DELIMITERS: 139 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 140 "multiple '@' and/or '#' delimiters in " 141 "name")); 142 break; 143 144 case NAME_ERR_NOLETTER: 145 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 146 "pool doesn't begin with a letter")); 147 break; 148 149 case NAME_ERR_RESERVED: 150 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 151 "name is reserved")); 152 break; 153 154 case NAME_ERR_DISKLIKE: 155 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 156 "reserved disk name")); 157 break; 158 159 default: 160 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 161 "(%d) not defined"), why); 162 break; 163 } 164 } 165 166 return (0); 167 } 168 169 if (!(type & ZFS_TYPE_SNAPSHOT) && strchr(path, '@') != NULL) { 170 if (hdl != NULL) 171 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 172 "snapshot delimiter '@' is not expected here")); 173 return (0); 174 } 175 176 if (type == ZFS_TYPE_SNAPSHOT && strchr(path, '@') == NULL) { 177 if (hdl != NULL) 178 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 179 "missing '@' delimiter in snapshot name")); 180 return (0); 181 } 182 183 if (!(type & ZFS_TYPE_BOOKMARK) && strchr(path, '#') != NULL) { 184 if (hdl != NULL) 185 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 186 "bookmark delimiter '#' is not expected here")); 187 return (0); 188 } 189 190 if (type == ZFS_TYPE_BOOKMARK && strchr(path, '#') == NULL) { 191 if (hdl != NULL) 192 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 193 "missing '#' delimiter in bookmark name")); 194 return (0); 195 } 196 197 if (modifying && strchr(path, '%') != NULL) { 198 if (hdl != NULL) 199 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 200 "invalid character %c in name"), '%'); 201 return (0); 202 } 203 204 return (-1); 205 } 206 207 int 208 zfs_name_valid(const char *name, zfs_type_t type) 209 { 210 if (type == ZFS_TYPE_POOL) 211 return (zpool_name_valid(NULL, B_FALSE, name)); 212 return (zfs_validate_name(NULL, name, type, B_FALSE)); 213 } 214 215 /* 216 * This function takes the raw DSL properties, and filters out the user-defined 217 * properties into a separate nvlist. 218 */ 219 static nvlist_t * 220 process_user_props(zfs_handle_t *zhp, nvlist_t *props) 221 { 222 libzfs_handle_t *hdl = zhp->zfs_hdl; 223 nvpair_t *elem; 224 nvlist_t *propval; 225 nvlist_t *nvl; 226 227 if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0) { 228 (void) no_memory(hdl); 229 return (NULL); 230 } 231 232 elem = NULL; 233 while ((elem = nvlist_next_nvpair(props, elem)) != NULL) { 234 if (!zfs_prop_user(nvpair_name(elem))) 235 continue; 236 237 verify(nvpair_value_nvlist(elem, &propval) == 0); 238 if (nvlist_add_nvlist(nvl, nvpair_name(elem), propval) != 0) { 239 nvlist_free(nvl); 240 (void) no_memory(hdl); 241 return (NULL); 242 } 243 } 244 245 return (nvl); 246 } 247 248 static zpool_handle_t * 249 zpool_add_handle(zfs_handle_t *zhp, const char *pool_name) 250 { 251 libzfs_handle_t *hdl = zhp->zfs_hdl; 252 zpool_handle_t *zph; 253 254 if ((zph = zpool_open_canfail(hdl, pool_name)) != NULL) { 255 if (hdl->libzfs_pool_handles != NULL) 256 zph->zpool_next = hdl->libzfs_pool_handles; 257 hdl->libzfs_pool_handles = zph; 258 } 259 return (zph); 260 } 261 262 static zpool_handle_t * 263 zpool_find_handle(zfs_handle_t *zhp, const char *pool_name, int len) 264 { 265 libzfs_handle_t *hdl = zhp->zfs_hdl; 266 zpool_handle_t *zph = hdl->libzfs_pool_handles; 267 268 while ((zph != NULL) && 269 (strncmp(pool_name, zpool_get_name(zph), len) != 0)) 270 zph = zph->zpool_next; 271 return (zph); 272 } 273 274 /* 275 * Returns a handle to the pool that contains the provided dataset. 276 * If a handle to that pool already exists then that handle is returned. 277 * Otherwise, a new handle is created and added to the list of handles. 278 */ 279 static zpool_handle_t * 280 zpool_handle(zfs_handle_t *zhp) 281 { 282 char *pool_name; 283 int len; 284 zpool_handle_t *zph; 285 286 len = strcspn(zhp->zfs_name, "/@#") + 1; 287 pool_name = zfs_alloc(zhp->zfs_hdl, len); 288 (void) strlcpy(pool_name, zhp->zfs_name, len); 289 290 zph = zpool_find_handle(zhp, pool_name, len); 291 if (zph == NULL) 292 zph = zpool_add_handle(zhp, pool_name); 293 294 free(pool_name); 295 return (zph); 296 } 297 298 void 299 zpool_free_handles(libzfs_handle_t *hdl) 300 { 301 zpool_handle_t *next, *zph = hdl->libzfs_pool_handles; 302 303 while (zph != NULL) { 304 next = zph->zpool_next; 305 zpool_close(zph); 306 zph = next; 307 } 308 hdl->libzfs_pool_handles = NULL; 309 } 310 311 /* 312 * Utility function to gather stats (objset and zpl) for the given object. 313 */ 314 static int 315 get_stats_ioctl(zfs_handle_t *zhp, zfs_cmd_t *zc) 316 { 317 libzfs_handle_t *hdl = zhp->zfs_hdl; 318 319 (void) strlcpy(zc->zc_name, zhp->zfs_name, sizeof (zc->zc_name)); 320 321 while (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_STATS, zc) != 0) { 322 if (errno == ENOMEM) { 323 if (zcmd_expand_dst_nvlist(hdl, zc) != 0) { 324 return (-1); 325 } 326 } else { 327 return (-1); 328 } 329 } 330 return (0); 331 } 332 333 /* 334 * Utility function to get the received properties of the given object. 335 */ 336 static int 337 get_recvd_props_ioctl(zfs_handle_t *zhp) 338 { 339 libzfs_handle_t *hdl = zhp->zfs_hdl; 340 nvlist_t *recvdprops; 341 zfs_cmd_t zc = { 0 }; 342 int err; 343 344 if (zcmd_alloc_dst_nvlist(hdl, &zc, 0) != 0) 345 return (-1); 346 347 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 348 349 while (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_RECVD_PROPS, &zc) != 0) { 350 if (errno == ENOMEM) { 351 if (zcmd_expand_dst_nvlist(hdl, &zc) != 0) { 352 return (-1); 353 } 354 } else { 355 zcmd_free_nvlists(&zc); 356 return (-1); 357 } 358 } 359 360 err = zcmd_read_dst_nvlist(zhp->zfs_hdl, &zc, &recvdprops); 361 zcmd_free_nvlists(&zc); 362 if (err != 0) 363 return (-1); 364 365 nvlist_free(zhp->zfs_recvd_props); 366 zhp->zfs_recvd_props = recvdprops; 367 368 return (0); 369 } 370 371 static int 372 put_stats_zhdl(zfs_handle_t *zhp, zfs_cmd_t *zc) 373 { 374 nvlist_t *allprops, *userprops; 375 376 zhp->zfs_dmustats = zc->zc_objset_stats; /* structure assignment */ 377 378 if (zcmd_read_dst_nvlist(zhp->zfs_hdl, zc, &allprops) != 0) { 379 return (-1); 380 } 381 382 /* 383 * XXX Why do we store the user props separately, in addition to 384 * storing them in zfs_props? 385 */ 386 if ((userprops = process_user_props(zhp, allprops)) == NULL) { 387 nvlist_free(allprops); 388 return (-1); 389 } 390 391 nvlist_free(zhp->zfs_props); 392 nvlist_free(zhp->zfs_user_props); 393 394 zhp->zfs_props = allprops; 395 zhp->zfs_user_props = userprops; 396 397 return (0); 398 } 399 400 static int 401 get_stats(zfs_handle_t *zhp) 402 { 403 int rc = 0; 404 zfs_cmd_t zc = { 0 }; 405 406 if (zcmd_alloc_dst_nvlist(zhp->zfs_hdl, &zc, 0) != 0) 407 return (-1); 408 if (get_stats_ioctl(zhp, &zc) != 0) 409 rc = -1; 410 else if (put_stats_zhdl(zhp, &zc) != 0) 411 rc = -1; 412 zcmd_free_nvlists(&zc); 413 return (rc); 414 } 415 416 /* 417 * Refresh the properties currently stored in the handle. 418 */ 419 void 420 zfs_refresh_properties(zfs_handle_t *zhp) 421 { 422 (void) get_stats(zhp); 423 } 424 425 /* 426 * Makes a handle from the given dataset name. Used by zfs_open() and 427 * zfs_iter_* to create child handles on the fly. 428 */ 429 static int 430 make_dataset_handle_common(zfs_handle_t *zhp, zfs_cmd_t *zc) 431 { 432 if (put_stats_zhdl(zhp, zc) != 0) 433 return (-1); 434 435 /* 436 * We've managed to open the dataset and gather statistics. Determine 437 * the high-level type. 438 */ 439 if (zhp->zfs_dmustats.dds_type == DMU_OST_ZVOL) 440 zhp->zfs_head_type = ZFS_TYPE_VOLUME; 441 else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZFS) 442 zhp->zfs_head_type = ZFS_TYPE_FILESYSTEM; 443 else 444 abort(); 445 446 if (zhp->zfs_dmustats.dds_is_snapshot) 447 zhp->zfs_type = ZFS_TYPE_SNAPSHOT; 448 else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZVOL) 449 zhp->zfs_type = ZFS_TYPE_VOLUME; 450 else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZFS) 451 zhp->zfs_type = ZFS_TYPE_FILESYSTEM; 452 else 453 abort(); /* we should never see any other types */ 454 455 if ((zhp->zpool_hdl = zpool_handle(zhp)) == NULL) 456 return (-1); 457 458 return (0); 459 } 460 461 zfs_handle_t * 462 make_dataset_handle(libzfs_handle_t *hdl, const char *path) 463 { 464 zfs_cmd_t zc = { 0 }; 465 466 zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1); 467 468 if (zhp == NULL) 469 return (NULL); 470 471 zhp->zfs_hdl = hdl; 472 (void) strlcpy(zhp->zfs_name, path, sizeof (zhp->zfs_name)); 473 if (zcmd_alloc_dst_nvlist(hdl, &zc, 0) != 0) { 474 free(zhp); 475 return (NULL); 476 } 477 if (get_stats_ioctl(zhp, &zc) == -1) { 478 zcmd_free_nvlists(&zc); 479 free(zhp); 480 return (NULL); 481 } 482 if (make_dataset_handle_common(zhp, &zc) == -1) { 483 free(zhp); 484 zhp = NULL; 485 } 486 zcmd_free_nvlists(&zc); 487 return (zhp); 488 } 489 490 zfs_handle_t * 491 make_dataset_handle_zc(libzfs_handle_t *hdl, zfs_cmd_t *zc) 492 { 493 zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1); 494 495 if (zhp == NULL) 496 return (NULL); 497 498 zhp->zfs_hdl = hdl; 499 (void) strlcpy(zhp->zfs_name, zc->zc_name, sizeof (zhp->zfs_name)); 500 if (make_dataset_handle_common(zhp, zc) == -1) { 501 free(zhp); 502 return (NULL); 503 } 504 return (zhp); 505 } 506 507 zfs_handle_t * 508 make_dataset_simple_handle_zc(zfs_handle_t *pzhp, zfs_cmd_t *zc) 509 { 510 zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1); 511 512 if (zhp == NULL) 513 return (NULL); 514 515 zhp->zfs_hdl = pzhp->zfs_hdl; 516 (void) strlcpy(zhp->zfs_name, zc->zc_name, sizeof (zhp->zfs_name)); 517 zhp->zfs_head_type = pzhp->zfs_type; 518 zhp->zfs_type = ZFS_TYPE_SNAPSHOT; 519 zhp->zpool_hdl = zpool_handle(zhp); 520 return (zhp); 521 } 522 523 zfs_handle_t * 524 zfs_handle_dup(zfs_handle_t *zhp_orig) 525 { 526 zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1); 527 528 if (zhp == NULL) 529 return (NULL); 530 531 zhp->zfs_hdl = zhp_orig->zfs_hdl; 532 zhp->zpool_hdl = zhp_orig->zpool_hdl; 533 (void) strlcpy(zhp->zfs_name, zhp_orig->zfs_name, 534 sizeof (zhp->zfs_name)); 535 zhp->zfs_type = zhp_orig->zfs_type; 536 zhp->zfs_head_type = zhp_orig->zfs_head_type; 537 zhp->zfs_dmustats = zhp_orig->zfs_dmustats; 538 if (zhp_orig->zfs_props != NULL) { 539 if (nvlist_dup(zhp_orig->zfs_props, &zhp->zfs_props, 0) != 0) { 540 (void) no_memory(zhp->zfs_hdl); 541 zfs_close(zhp); 542 return (NULL); 543 } 544 } 545 if (zhp_orig->zfs_user_props != NULL) { 546 if (nvlist_dup(zhp_orig->zfs_user_props, 547 &zhp->zfs_user_props, 0) != 0) { 548 (void) no_memory(zhp->zfs_hdl); 549 zfs_close(zhp); 550 return (NULL); 551 } 552 } 553 if (zhp_orig->zfs_recvd_props != NULL) { 554 if (nvlist_dup(zhp_orig->zfs_recvd_props, 555 &zhp->zfs_recvd_props, 0)) { 556 (void) no_memory(zhp->zfs_hdl); 557 zfs_close(zhp); 558 return (NULL); 559 } 560 } 561 zhp->zfs_mntcheck = zhp_orig->zfs_mntcheck; 562 if (zhp_orig->zfs_mntopts != NULL) { 563 zhp->zfs_mntopts = zfs_strdup(zhp_orig->zfs_hdl, 564 zhp_orig->zfs_mntopts); 565 } 566 zhp->zfs_props_table = zhp_orig->zfs_props_table; 567 return (zhp); 568 } 569 570 boolean_t 571 zfs_bookmark_exists(const char *path) 572 { 573 nvlist_t *bmarks; 574 nvlist_t *props; 575 char fsname[ZFS_MAX_DATASET_NAME_LEN]; 576 char *bmark_name; 577 char *pound; 578 int err; 579 boolean_t rv; 580 581 582 (void) strlcpy(fsname, path, sizeof (fsname)); 583 pound = strchr(fsname, '#'); 584 if (pound == NULL) 585 return (B_FALSE); 586 587 *pound = '\0'; 588 bmark_name = pound + 1; 589 props = fnvlist_alloc(); 590 err = lzc_get_bookmarks(fsname, props, &bmarks); 591 nvlist_free(props); 592 if (err != 0) { 593 nvlist_free(bmarks); 594 return (B_FALSE); 595 } 596 597 rv = nvlist_exists(bmarks, bmark_name); 598 nvlist_free(bmarks); 599 return (rv); 600 } 601 602 zfs_handle_t * 603 make_bookmark_handle(zfs_handle_t *parent, const char *path, 604 nvlist_t *bmark_props) 605 { 606 zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1); 607 608 if (zhp == NULL) 609 return (NULL); 610 611 /* Fill in the name. */ 612 zhp->zfs_hdl = parent->zfs_hdl; 613 (void) strlcpy(zhp->zfs_name, path, sizeof (zhp->zfs_name)); 614 615 /* Set the property lists. */ 616 if (nvlist_dup(bmark_props, &zhp->zfs_props, 0) != 0) { 617 free(zhp); 618 return (NULL); 619 } 620 621 /* Set the types. */ 622 zhp->zfs_head_type = parent->zfs_head_type; 623 zhp->zfs_type = ZFS_TYPE_BOOKMARK; 624 625 if ((zhp->zpool_hdl = zpool_handle(zhp)) == NULL) { 626 nvlist_free(zhp->zfs_props); 627 free(zhp); 628 return (NULL); 629 } 630 631 return (zhp); 632 } 633 634 struct zfs_open_bookmarks_cb_data { 635 const char *path; 636 zfs_handle_t *zhp; 637 }; 638 639 static int 640 zfs_open_bookmarks_cb(zfs_handle_t *zhp, void *data) 641 { 642 struct zfs_open_bookmarks_cb_data *dp = data; 643 644 /* 645 * Is it the one we are looking for? 646 */ 647 if (strcmp(dp->path, zfs_get_name(zhp)) == 0) { 648 /* 649 * We found it. Save it and let the caller know we are done. 650 */ 651 dp->zhp = zhp; 652 return (EEXIST); 653 } 654 655 /* 656 * Not found. Close the handle and ask for another one. 657 */ 658 zfs_close(zhp); 659 return (0); 660 } 661 662 /* 663 * Opens the given snapshot, bookmark, filesystem, or volume. The 'types' 664 * argument is a mask of acceptable types. The function will print an 665 * appropriate error message and return NULL if it can't be opened. 666 */ 667 zfs_handle_t * 668 zfs_open(libzfs_handle_t *hdl, const char *path, int types) 669 { 670 zfs_handle_t *zhp; 671 char errbuf[1024]; 672 char *bookp; 673 674 (void) snprintf(errbuf, sizeof (errbuf), 675 dgettext(TEXT_DOMAIN, "cannot open '%s'"), path); 676 677 /* 678 * Validate the name before we even try to open it. 679 */ 680 if (!zfs_validate_name(hdl, path, types, B_FALSE)) { 681 (void) zfs_error(hdl, EZFS_INVALIDNAME, errbuf); 682 return (NULL); 683 } 684 685 /* 686 * Bookmarks needs to be handled separately. 687 */ 688 bookp = strchr(path, '#'); 689 if (bookp == NULL) { 690 /* 691 * Try to get stats for the dataset, which will tell us if it 692 * exists. 693 */ 694 errno = 0; 695 if ((zhp = make_dataset_handle(hdl, path)) == NULL) { 696 (void) zfs_standard_error(hdl, errno, errbuf); 697 return (NULL); 698 } 699 } else { 700 char dsname[ZFS_MAX_DATASET_NAME_LEN]; 701 zfs_handle_t *pzhp; 702 struct zfs_open_bookmarks_cb_data cb_data = {path, NULL}; 703 704 /* 705 * We need to cut out '#' and everything after '#' 706 * to get the parent dataset name only. 707 */ 708 assert(bookp - path < sizeof (dsname)); 709 (void) strncpy(dsname, path, bookp - path); 710 dsname[bookp - path] = '\0'; 711 712 /* 713 * Create handle for the parent dataset. 714 */ 715 errno = 0; 716 if ((pzhp = make_dataset_handle(hdl, dsname)) == NULL) { 717 (void) zfs_standard_error(hdl, errno, errbuf); 718 return (NULL); 719 } 720 721 /* 722 * Iterate bookmarks to find the right one. 723 */ 724 errno = 0; 725 if ((zfs_iter_bookmarks(pzhp, zfs_open_bookmarks_cb, 726 &cb_data) == 0) && (cb_data.zhp == NULL)) { 727 (void) zfs_error(hdl, EZFS_NOENT, errbuf); 728 zfs_close(pzhp); 729 return (NULL); 730 } 731 if (cb_data.zhp == NULL) { 732 (void) zfs_standard_error(hdl, errno, errbuf); 733 zfs_close(pzhp); 734 return (NULL); 735 } 736 zhp = cb_data.zhp; 737 738 /* 739 * Cleanup. 740 */ 741 zfs_close(pzhp); 742 } 743 744 if (!(types & zhp->zfs_type)) { 745 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf); 746 zfs_close(zhp); 747 return (NULL); 748 } 749 750 return (zhp); 751 } 752 753 /* 754 * Release a ZFS handle. Nothing to do but free the associated memory. 755 */ 756 void 757 zfs_close(zfs_handle_t *zhp) 758 { 759 if (zhp->zfs_mntopts) 760 free(zhp->zfs_mntopts); 761 nvlist_free(zhp->zfs_props); 762 nvlist_free(zhp->zfs_user_props); 763 nvlist_free(zhp->zfs_recvd_props); 764 free(zhp); 765 } 766 767 typedef struct mnttab_node { 768 struct mnttab mtn_mt; 769 avl_node_t mtn_node; 770 } mnttab_node_t; 771 772 static int 773 libzfs_mnttab_cache_compare(const void *arg1, const void *arg2) 774 { 775 const mnttab_node_t *mtn1 = arg1; 776 const mnttab_node_t *mtn2 = arg2; 777 int rv; 778 779 rv = strcmp(mtn1->mtn_mt.mnt_special, mtn2->mtn_mt.mnt_special); 780 781 if (rv == 0) 782 return (0); 783 return (rv > 0 ? 1 : -1); 784 } 785 786 void 787 libzfs_mnttab_init(libzfs_handle_t *hdl) 788 { 789 (void) mutex_init(&hdl->libzfs_mnttab_cache_lock, 790 LOCK_NORMAL | LOCK_ERRORCHECK, NULL); 791 assert(avl_numnodes(&hdl->libzfs_mnttab_cache) == 0); 792 avl_create(&hdl->libzfs_mnttab_cache, libzfs_mnttab_cache_compare, 793 sizeof (mnttab_node_t), offsetof(mnttab_node_t, mtn_node)); 794 } 795 796 void 797 libzfs_mnttab_update(libzfs_handle_t *hdl) 798 { 799 struct mnttab entry; 800 801 rewind(hdl->libzfs_mnttab); 802 while (getmntent(hdl->libzfs_mnttab, &entry) == 0) { 803 mnttab_node_t *mtn; 804 805 if (strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0) 806 continue; 807 mtn = zfs_alloc(hdl, sizeof (mnttab_node_t)); 808 mtn->mtn_mt.mnt_special = zfs_strdup(hdl, entry.mnt_special); 809 mtn->mtn_mt.mnt_mountp = zfs_strdup(hdl, entry.mnt_mountp); 810 mtn->mtn_mt.mnt_fstype = zfs_strdup(hdl, entry.mnt_fstype); 811 mtn->mtn_mt.mnt_mntopts = zfs_strdup(hdl, entry.mnt_mntopts); 812 avl_add(&hdl->libzfs_mnttab_cache, mtn); 813 } 814 } 815 816 void 817 libzfs_mnttab_fini(libzfs_handle_t *hdl) 818 { 819 void *cookie = NULL; 820 mnttab_node_t *mtn; 821 822 while ((mtn = avl_destroy_nodes(&hdl->libzfs_mnttab_cache, &cookie)) 823 != NULL) { 824 free(mtn->mtn_mt.mnt_special); 825 free(mtn->mtn_mt.mnt_mountp); 826 free(mtn->mtn_mt.mnt_fstype); 827 free(mtn->mtn_mt.mnt_mntopts); 828 free(mtn); 829 } 830 avl_destroy(&hdl->libzfs_mnttab_cache); 831 (void) mutex_destroy(&hdl->libzfs_mnttab_cache_lock); 832 } 833 834 void 835 libzfs_mnttab_cache(libzfs_handle_t *hdl, boolean_t enable) 836 { 837 hdl->libzfs_mnttab_enable = enable; 838 } 839 840 int 841 libzfs_mnttab_find(libzfs_handle_t *hdl, const char *fsname, 842 struct mnttab *entry) 843 { 844 mnttab_node_t find; 845 mnttab_node_t *mtn; 846 int ret = ENOENT; 847 848 if (!hdl->libzfs_mnttab_enable) { 849 struct mnttab srch = { 0 }; 850 851 if (avl_numnodes(&hdl->libzfs_mnttab_cache)) 852 libzfs_mnttab_fini(hdl); 853 rewind(hdl->libzfs_mnttab); 854 srch.mnt_special = (char *)fsname; 855 srch.mnt_fstype = MNTTYPE_ZFS; 856 if (getmntany(hdl->libzfs_mnttab, entry, &srch) == 0) 857 return (0); 858 else 859 return (ENOENT); 860 } 861 862 mutex_enter(&hdl->libzfs_mnttab_cache_lock); 863 if (avl_numnodes(&hdl->libzfs_mnttab_cache) == 0) 864 libzfs_mnttab_update(hdl); 865 866 find.mtn_mt.mnt_special = (char *)fsname; 867 mtn = avl_find(&hdl->libzfs_mnttab_cache, &find, NULL); 868 if (mtn) { 869 *entry = mtn->mtn_mt; 870 ret = 0; 871 } 872 mutex_exit(&hdl->libzfs_mnttab_cache_lock); 873 return (ret); 874 } 875 876 void 877 libzfs_mnttab_add(libzfs_handle_t *hdl, const char *special, 878 const char *mountp, const char *mntopts) 879 { 880 mnttab_node_t *mtn; 881 882 mutex_enter(&hdl->libzfs_mnttab_cache_lock); 883 if (avl_numnodes(&hdl->libzfs_mnttab_cache) != 0) { 884 mtn = zfs_alloc(hdl, sizeof (mnttab_node_t)); 885 mtn->mtn_mt.mnt_special = zfs_strdup(hdl, special); 886 mtn->mtn_mt.mnt_mountp = zfs_strdup(hdl, mountp); 887 mtn->mtn_mt.mnt_fstype = zfs_strdup(hdl, MNTTYPE_ZFS); 888 mtn->mtn_mt.mnt_mntopts = zfs_strdup(hdl, mntopts); 889 avl_add(&hdl->libzfs_mnttab_cache, mtn); 890 } 891 mutex_exit(&hdl->libzfs_mnttab_cache_lock); 892 } 893 894 void 895 libzfs_mnttab_remove(libzfs_handle_t *hdl, const char *fsname) 896 { 897 mnttab_node_t find; 898 mnttab_node_t *ret; 899 900 mutex_enter(&hdl->libzfs_mnttab_cache_lock); 901 find.mtn_mt.mnt_special = (char *)fsname; 902 if ((ret = avl_find(&hdl->libzfs_mnttab_cache, (void *)&find, NULL)) 903 != NULL) { 904 avl_remove(&hdl->libzfs_mnttab_cache, ret); 905 free(ret->mtn_mt.mnt_special); 906 free(ret->mtn_mt.mnt_mountp); 907 free(ret->mtn_mt.mnt_fstype); 908 free(ret->mtn_mt.mnt_mntopts); 909 free(ret); 910 } 911 mutex_exit(&hdl->libzfs_mnttab_cache_lock); 912 } 913 914 int 915 zfs_spa_version(zfs_handle_t *zhp, int *spa_version) 916 { 917 zpool_handle_t *zpool_handle = zhp->zpool_hdl; 918 919 if (zpool_handle == NULL) 920 return (-1); 921 922 *spa_version = zpool_get_prop_int(zpool_handle, 923 ZPOOL_PROP_VERSION, NULL); 924 return (0); 925 } 926 927 /* 928 * The choice of reservation property depends on the SPA version. 929 */ 930 static int 931 zfs_which_resv_prop(zfs_handle_t *zhp, zfs_prop_t *resv_prop) 932 { 933 int spa_version; 934 935 if (zfs_spa_version(zhp, &spa_version) < 0) 936 return (-1); 937 938 if (spa_version >= SPA_VERSION_REFRESERVATION) 939 *resv_prop = ZFS_PROP_REFRESERVATION; 940 else 941 *resv_prop = ZFS_PROP_RESERVATION; 942 943 return (0); 944 } 945 946 /* 947 * Given an nvlist of properties to set, validates that they are correct, and 948 * parses any numeric properties (index, boolean, etc) if they are specified as 949 * strings. 950 */ 951 nvlist_t * 952 zfs_valid_proplist(libzfs_handle_t *hdl, zfs_type_t type, nvlist_t *nvl, 953 uint64_t zoned, zfs_handle_t *zhp, zpool_handle_t *zpool_hdl, 954 const char *errbuf) 955 { 956 nvpair_t *elem; 957 uint64_t intval; 958 char *strval; 959 zfs_prop_t prop; 960 nvlist_t *ret; 961 int chosen_normal = -1; 962 int chosen_utf = -1; 963 964 if (nvlist_alloc(&ret, NV_UNIQUE_NAME, 0) != 0) { 965 (void) no_memory(hdl); 966 return (NULL); 967 } 968 969 /* 970 * Make sure this property is valid and applies to this type. 971 */ 972 973 elem = NULL; 974 while ((elem = nvlist_next_nvpair(nvl, elem)) != NULL) { 975 const char *propname = nvpair_name(elem); 976 977 prop = zfs_name_to_prop(propname); 978 if (prop == ZPROP_INVAL && zfs_prop_user(propname)) { 979 /* 980 * This is a user property: make sure it's a 981 * string, and that it's less than ZAP_MAXNAMELEN. 982 */ 983 if (nvpair_type(elem) != DATA_TYPE_STRING) { 984 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 985 "'%s' must be a string"), propname); 986 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 987 goto error; 988 } 989 990 if (strlen(nvpair_name(elem)) >= ZAP_MAXNAMELEN) { 991 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 992 "property name '%s' is too long"), 993 propname); 994 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 995 goto error; 996 } 997 998 (void) nvpair_value_string(elem, &strval); 999 if (nvlist_add_string(ret, propname, strval) != 0) { 1000 (void) no_memory(hdl); 1001 goto error; 1002 } 1003 continue; 1004 } 1005 1006 /* 1007 * Currently, only user properties can be modified on 1008 * snapshots. 1009 */ 1010 if (type == ZFS_TYPE_SNAPSHOT) { 1011 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1012 "this property can not be modified for snapshots")); 1013 (void) zfs_error(hdl, EZFS_PROPTYPE, errbuf); 1014 goto error; 1015 } 1016 1017 if (prop == ZPROP_INVAL && zfs_prop_userquota(propname)) { 1018 zfs_userquota_prop_t uqtype; 1019 char newpropname[128]; 1020 char domain[128]; 1021 uint64_t rid; 1022 uint64_t valary[3]; 1023 1024 if (userquota_propname_decode(propname, zoned, 1025 &uqtype, domain, sizeof (domain), &rid) != 0) { 1026 zfs_error_aux(hdl, 1027 dgettext(TEXT_DOMAIN, 1028 "'%s' has an invalid user/group name"), 1029 propname); 1030 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1031 goto error; 1032 } 1033 1034 if (uqtype != ZFS_PROP_USERQUOTA && 1035 uqtype != ZFS_PROP_GROUPQUOTA) { 1036 zfs_error_aux(hdl, 1037 dgettext(TEXT_DOMAIN, "'%s' is readonly"), 1038 propname); 1039 (void) zfs_error(hdl, EZFS_PROPREADONLY, 1040 errbuf); 1041 goto error; 1042 } 1043 1044 if (nvpair_type(elem) == DATA_TYPE_STRING) { 1045 (void) nvpair_value_string(elem, &strval); 1046 if (strcmp(strval, "none") == 0) { 1047 intval = 0; 1048 } else if (zfs_nicestrtonum(hdl, 1049 strval, &intval) != 0) { 1050 (void) zfs_error(hdl, 1051 EZFS_BADPROP, errbuf); 1052 goto error; 1053 } 1054 } else if (nvpair_type(elem) == 1055 DATA_TYPE_UINT64) { 1056 (void) nvpair_value_uint64(elem, &intval); 1057 if (intval == 0) { 1058 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1059 "use 'none' to disable " 1060 "userquota/groupquota")); 1061 goto error; 1062 } 1063 } else { 1064 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1065 "'%s' must be a number"), propname); 1066 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1067 goto error; 1068 } 1069 1070 /* 1071 * Encode the prop name as 1072 * userquota@<hex-rid>-domain, to make it easy 1073 * for the kernel to decode. 1074 */ 1075 (void) snprintf(newpropname, sizeof (newpropname), 1076 "%s%llx-%s", zfs_userquota_prop_prefixes[uqtype], 1077 (longlong_t)rid, domain); 1078 valary[0] = uqtype; 1079 valary[1] = rid; 1080 valary[2] = intval; 1081 if (nvlist_add_uint64_array(ret, newpropname, 1082 valary, 3) != 0) { 1083 (void) no_memory(hdl); 1084 goto error; 1085 } 1086 continue; 1087 } else if (prop == ZPROP_INVAL && zfs_prop_written(propname)) { 1088 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1089 "'%s' is readonly"), 1090 propname); 1091 (void) zfs_error(hdl, EZFS_PROPREADONLY, errbuf); 1092 goto error; 1093 } 1094 1095 if (prop == ZPROP_INVAL) { 1096 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1097 "invalid property '%s'"), propname); 1098 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1099 goto error; 1100 } 1101 1102 if (!zfs_prop_valid_for_type(prop, type)) { 1103 zfs_error_aux(hdl, 1104 dgettext(TEXT_DOMAIN, "'%s' does not " 1105 "apply to datasets of this type"), propname); 1106 (void) zfs_error(hdl, EZFS_PROPTYPE, errbuf); 1107 goto error; 1108 } 1109 1110 if (zfs_prop_readonly(prop) && 1111 (!zfs_prop_setonce(prop) || zhp != NULL)) { 1112 zfs_error_aux(hdl, 1113 dgettext(TEXT_DOMAIN, "'%s' is readonly"), 1114 propname); 1115 (void) zfs_error(hdl, EZFS_PROPREADONLY, errbuf); 1116 goto error; 1117 } 1118 1119 if (zprop_parse_value(hdl, elem, prop, type, ret, 1120 &strval, &intval, errbuf) != 0) 1121 goto error; 1122 1123 /* 1124 * Perform some additional checks for specific properties. 1125 */ 1126 switch (prop) { 1127 case ZFS_PROP_VERSION: 1128 { 1129 int version; 1130 1131 if (zhp == NULL) 1132 break; 1133 version = zfs_prop_get_int(zhp, ZFS_PROP_VERSION); 1134 if (intval < version) { 1135 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1136 "Can not downgrade; already at version %u"), 1137 version); 1138 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1139 goto error; 1140 } 1141 break; 1142 } 1143 1144 case ZFS_PROP_VOLBLOCKSIZE: 1145 case ZFS_PROP_RECORDSIZE: 1146 { 1147 int maxbs = SPA_MAXBLOCKSIZE; 1148 if (zpool_hdl != NULL) { 1149 maxbs = zpool_get_prop_int(zpool_hdl, 1150 ZPOOL_PROP_MAXBLOCKSIZE, NULL); 1151 } 1152 /* 1153 * Volumes are limited to a volblocksize of 128KB, 1154 * because they typically service workloads with 1155 * small random writes, which incur a large performance 1156 * penalty with large blocks. 1157 */ 1158 if (prop == ZFS_PROP_VOLBLOCKSIZE) 1159 maxbs = SPA_OLD_MAXBLOCKSIZE; 1160 /* 1161 * The value must be a power of two between 1162 * SPA_MINBLOCKSIZE and maxbs. 1163 */ 1164 if (intval < SPA_MINBLOCKSIZE || 1165 intval > maxbs || !ISP2(intval)) { 1166 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1167 "'%s' must be power of 2 from 512B " 1168 "to %uKB"), propname, maxbs >> 10); 1169 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1170 goto error; 1171 } 1172 break; 1173 } 1174 case ZFS_PROP_MLSLABEL: 1175 { 1176 /* 1177 * Verify the mlslabel string and convert to 1178 * internal hex label string. 1179 */ 1180 1181 m_label_t *new_sl; 1182 char *hex = NULL; /* internal label string */ 1183 1184 /* Default value is already OK. */ 1185 if (strcasecmp(strval, ZFS_MLSLABEL_DEFAULT) == 0) 1186 break; 1187 1188 /* Verify the label can be converted to binary form */ 1189 if (((new_sl = m_label_alloc(MAC_LABEL)) == NULL) || 1190 (str_to_label(strval, &new_sl, MAC_LABEL, 1191 L_NO_CORRECTION, NULL) == -1)) { 1192 goto badlabel; 1193 } 1194 1195 /* Now translate to hex internal label string */ 1196 if (label_to_str(new_sl, &hex, M_INTERNAL, 1197 DEF_NAMES) != 0) { 1198 if (hex) 1199 free(hex); 1200 goto badlabel; 1201 } 1202 m_label_free(new_sl); 1203 1204 /* If string is already in internal form, we're done. */ 1205 if (strcmp(strval, hex) == 0) { 1206 free(hex); 1207 break; 1208 } 1209 1210 /* Replace the label string with the internal form. */ 1211 (void) nvlist_remove(ret, zfs_prop_to_name(prop), 1212 DATA_TYPE_STRING); 1213 verify(nvlist_add_string(ret, zfs_prop_to_name(prop), 1214 hex) == 0); 1215 free(hex); 1216 1217 break; 1218 1219 badlabel: 1220 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1221 "invalid mlslabel '%s'"), strval); 1222 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1223 m_label_free(new_sl); /* OK if null */ 1224 goto error; 1225 1226 } 1227 1228 case ZFS_PROP_MOUNTPOINT: 1229 { 1230 namecheck_err_t why; 1231 1232 if (strcmp(strval, ZFS_MOUNTPOINT_NONE) == 0 || 1233 strcmp(strval, ZFS_MOUNTPOINT_LEGACY) == 0) 1234 break; 1235 1236 if (mountpoint_namecheck(strval, &why)) { 1237 switch (why) { 1238 case NAME_ERR_LEADING_SLASH: 1239 zfs_error_aux(hdl, 1240 dgettext(TEXT_DOMAIN, 1241 "'%s' must be an absolute path, " 1242 "'none', or 'legacy'"), propname); 1243 break; 1244 case NAME_ERR_TOOLONG: 1245 zfs_error_aux(hdl, 1246 dgettext(TEXT_DOMAIN, 1247 "component of '%s' is too long"), 1248 propname); 1249 break; 1250 1251 default: 1252 zfs_error_aux(hdl, 1253 dgettext(TEXT_DOMAIN, 1254 "(%d) not defined"), 1255 why); 1256 break; 1257 } 1258 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1259 goto error; 1260 } 1261 } 1262 1263 /*FALLTHRU*/ 1264 1265 case ZFS_PROP_SHARESMB: 1266 case ZFS_PROP_SHARENFS: 1267 /* 1268 * For the mountpoint and sharenfs or sharesmb 1269 * properties, check if it can be set in a 1270 * global/non-global zone based on 1271 * the zoned property value: 1272 * 1273 * global zone non-global zone 1274 * -------------------------------------------------- 1275 * zoned=on mountpoint (no) mountpoint (yes) 1276 * sharenfs (no) sharenfs (no) 1277 * sharesmb (no) sharesmb (no) 1278 * 1279 * zoned=off mountpoint (yes) N/A 1280 * sharenfs (yes) 1281 * sharesmb (yes) 1282 */ 1283 if (zoned) { 1284 if (getzoneid() == GLOBAL_ZONEID) { 1285 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1286 "'%s' cannot be set on " 1287 "dataset in a non-global zone"), 1288 propname); 1289 (void) zfs_error(hdl, EZFS_ZONED, 1290 errbuf); 1291 goto error; 1292 } else if (prop == ZFS_PROP_SHARENFS || 1293 prop == ZFS_PROP_SHARESMB) { 1294 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1295 "'%s' cannot be set in " 1296 "a non-global zone"), propname); 1297 (void) zfs_error(hdl, EZFS_ZONED, 1298 errbuf); 1299 goto error; 1300 } 1301 } else if (getzoneid() != GLOBAL_ZONEID) { 1302 /* 1303 * If zoned property is 'off', this must be in 1304 * a global zone. If not, something is wrong. 1305 */ 1306 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1307 "'%s' cannot be set while dataset " 1308 "'zoned' property is set"), propname); 1309 (void) zfs_error(hdl, EZFS_ZONED, errbuf); 1310 goto error; 1311 } 1312 1313 /* 1314 * At this point, it is legitimate to set the 1315 * property. Now we want to make sure that the 1316 * property value is valid if it is sharenfs. 1317 */ 1318 if ((prop == ZFS_PROP_SHARENFS || 1319 prop == ZFS_PROP_SHARESMB) && 1320 strcmp(strval, "on") != 0 && 1321 strcmp(strval, "off") != 0) { 1322 zfs_share_proto_t proto; 1323 1324 if (prop == ZFS_PROP_SHARESMB) 1325 proto = PROTO_SMB; 1326 else 1327 proto = PROTO_NFS; 1328 1329 /* 1330 * Must be an valid sharing protocol 1331 * option string so init the libshare 1332 * in order to enable the parser and 1333 * then parse the options. We use the 1334 * control API since we don't care about 1335 * the current configuration and don't 1336 * want the overhead of loading it 1337 * until we actually do something. 1338 */ 1339 1340 if (zfs_init_libshare(hdl, 1341 SA_INIT_CONTROL_API) != SA_OK) { 1342 /* 1343 * An error occurred so we can't do 1344 * anything 1345 */ 1346 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1347 "'%s' cannot be set: problem " 1348 "in share initialization"), 1349 propname); 1350 (void) zfs_error(hdl, EZFS_BADPROP, 1351 errbuf); 1352 goto error; 1353 } 1354 1355 if (zfs_parse_options(strval, proto) != SA_OK) { 1356 /* 1357 * There was an error in parsing so 1358 * deal with it by issuing an error 1359 * message and leaving after 1360 * uninitializing the the libshare 1361 * interface. 1362 */ 1363 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1364 "'%s' cannot be set to invalid " 1365 "options"), propname); 1366 (void) zfs_error(hdl, EZFS_BADPROP, 1367 errbuf); 1368 zfs_uninit_libshare(hdl); 1369 goto error; 1370 } 1371 zfs_uninit_libshare(hdl); 1372 } 1373 1374 break; 1375 1376 case ZFS_PROP_UTF8ONLY: 1377 chosen_utf = (int)intval; 1378 break; 1379 1380 case ZFS_PROP_NORMALIZE: 1381 chosen_normal = (int)intval; 1382 break; 1383 1384 default: 1385 break; 1386 } 1387 1388 /* 1389 * For changes to existing volumes, we have some additional 1390 * checks to enforce. 1391 */ 1392 if (type == ZFS_TYPE_VOLUME && zhp != NULL) { 1393 uint64_t volsize = zfs_prop_get_int(zhp, 1394 ZFS_PROP_VOLSIZE); 1395 uint64_t blocksize = zfs_prop_get_int(zhp, 1396 ZFS_PROP_VOLBLOCKSIZE); 1397 char buf[64]; 1398 1399 switch (prop) { 1400 case ZFS_PROP_RESERVATION: 1401 if (intval > volsize) { 1402 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1403 "'%s' is greater than current " 1404 "volume size"), propname); 1405 (void) zfs_error(hdl, EZFS_BADPROP, 1406 errbuf); 1407 goto error; 1408 } 1409 break; 1410 1411 case ZFS_PROP_REFRESERVATION: 1412 if (intval > volsize && intval != UINT64_MAX) { 1413 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1414 "'%s' is greater than current " 1415 "volume size"), propname); 1416 (void) zfs_error(hdl, EZFS_BADPROP, 1417 errbuf); 1418 goto error; 1419 } 1420 break; 1421 1422 case ZFS_PROP_VOLSIZE: 1423 if (intval % blocksize != 0) { 1424 zfs_nicenum(blocksize, buf, 1425 sizeof (buf)); 1426 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1427 "'%s' must be a multiple of " 1428 "volume block size (%s)"), 1429 propname, buf); 1430 (void) zfs_error(hdl, EZFS_BADPROP, 1431 errbuf); 1432 goto error; 1433 } 1434 1435 if (intval == 0) { 1436 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1437 "'%s' cannot be zero"), 1438 propname); 1439 (void) zfs_error(hdl, EZFS_BADPROP, 1440 errbuf); 1441 goto error; 1442 } 1443 break; 1444 1445 default: 1446 break; 1447 } 1448 } 1449 } 1450 1451 /* 1452 * If normalization was chosen, but no UTF8 choice was made, 1453 * enforce rejection of non-UTF8 names. 1454 * 1455 * If normalization was chosen, but rejecting non-UTF8 names 1456 * was explicitly not chosen, it is an error. 1457 */ 1458 if (chosen_normal > 0 && chosen_utf < 0) { 1459 if (nvlist_add_uint64(ret, 1460 zfs_prop_to_name(ZFS_PROP_UTF8ONLY), 1) != 0) { 1461 (void) no_memory(hdl); 1462 goto error; 1463 } 1464 } else if (chosen_normal > 0 && chosen_utf == 0) { 1465 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1466 "'%s' must be set 'on' if normalization chosen"), 1467 zfs_prop_to_name(ZFS_PROP_UTF8ONLY)); 1468 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1469 goto error; 1470 } 1471 return (ret); 1472 1473 error: 1474 nvlist_free(ret); 1475 return (NULL); 1476 } 1477 1478 int 1479 zfs_add_synthetic_resv(zfs_handle_t *zhp, nvlist_t *nvl) 1480 { 1481 uint64_t old_volsize; 1482 uint64_t new_volsize; 1483 uint64_t old_reservation; 1484 uint64_t new_reservation; 1485 zfs_prop_t resv_prop; 1486 nvlist_t *props; 1487 1488 /* 1489 * If this is an existing volume, and someone is setting the volsize, 1490 * make sure that it matches the reservation, or add it if necessary. 1491 */ 1492 old_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE); 1493 if (zfs_which_resv_prop(zhp, &resv_prop) < 0) 1494 return (-1); 1495 old_reservation = zfs_prop_get_int(zhp, resv_prop); 1496 1497 props = fnvlist_alloc(); 1498 fnvlist_add_uint64(props, zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE), 1499 zfs_prop_get_int(zhp, ZFS_PROP_VOLBLOCKSIZE)); 1500 1501 if ((zvol_volsize_to_reservation(old_volsize, props) != 1502 old_reservation) || nvlist_exists(nvl, 1503 zfs_prop_to_name(resv_prop))) { 1504 fnvlist_free(props); 1505 return (0); 1506 } 1507 if (nvlist_lookup_uint64(nvl, zfs_prop_to_name(ZFS_PROP_VOLSIZE), 1508 &new_volsize) != 0) { 1509 fnvlist_free(props); 1510 return (-1); 1511 } 1512 new_reservation = zvol_volsize_to_reservation(new_volsize, props); 1513 fnvlist_free(props); 1514 1515 if (nvlist_add_uint64(nvl, zfs_prop_to_name(resv_prop), 1516 new_reservation) != 0) { 1517 (void) no_memory(zhp->zfs_hdl); 1518 return (-1); 1519 } 1520 return (1); 1521 } 1522 1523 /* 1524 * Helper for 'zfs {set|clone} refreservation=auto'. Must be called after 1525 * zfs_valid_proplist(), as it is what sets the UINT64_MAX sentinal value. 1526 * Return codes must match zfs_add_synthetic_resv(). 1527 */ 1528 static int 1529 zfs_fix_auto_resv(zfs_handle_t *zhp, nvlist_t *nvl) 1530 { 1531 uint64_t volsize; 1532 uint64_t resvsize; 1533 zfs_prop_t prop; 1534 nvlist_t *props; 1535 1536 if (!ZFS_IS_VOLUME(zhp)) { 1537 return (0); 1538 } 1539 1540 if (zfs_which_resv_prop(zhp, &prop) != 0) { 1541 return (-1); 1542 } 1543 1544 if (prop != ZFS_PROP_REFRESERVATION) { 1545 return (0); 1546 } 1547 1548 if (nvlist_lookup_uint64(nvl, zfs_prop_to_name(prop), &resvsize) != 0) { 1549 /* No value being set, so it can't be "auto" */ 1550 return (0); 1551 } 1552 if (resvsize != UINT64_MAX) { 1553 /* Being set to a value other than "auto" */ 1554 return (0); 1555 } 1556 1557 props = fnvlist_alloc(); 1558 1559 fnvlist_add_uint64(props, zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE), 1560 zfs_prop_get_int(zhp, ZFS_PROP_VOLBLOCKSIZE)); 1561 1562 if (nvlist_lookup_uint64(nvl, zfs_prop_to_name(ZFS_PROP_VOLSIZE), 1563 &volsize) != 0) { 1564 volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE); 1565 } 1566 1567 resvsize = zvol_volsize_to_reservation(volsize, props); 1568 fnvlist_free(props); 1569 1570 (void) nvlist_remove_all(nvl, zfs_prop_to_name(prop)); 1571 if (nvlist_add_uint64(nvl, zfs_prop_to_name(prop), resvsize) != 0) { 1572 (void) no_memory(zhp->zfs_hdl); 1573 return (-1); 1574 } 1575 return (1); 1576 } 1577 1578 void 1579 zfs_setprop_error(libzfs_handle_t *hdl, zfs_prop_t prop, int err, 1580 char *errbuf) 1581 { 1582 switch (err) { 1583 1584 case ENOSPC: 1585 /* 1586 * For quotas and reservations, ENOSPC indicates 1587 * something different; setting a quota or reservation 1588 * doesn't use any disk space. 1589 */ 1590 switch (prop) { 1591 case ZFS_PROP_QUOTA: 1592 case ZFS_PROP_REFQUOTA: 1593 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1594 "size is less than current used or " 1595 "reserved space")); 1596 (void) zfs_error(hdl, EZFS_PROPSPACE, errbuf); 1597 break; 1598 1599 case ZFS_PROP_RESERVATION: 1600 case ZFS_PROP_REFRESERVATION: 1601 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1602 "size is greater than available space")); 1603 (void) zfs_error(hdl, EZFS_PROPSPACE, errbuf); 1604 break; 1605 1606 default: 1607 (void) zfs_standard_error(hdl, err, errbuf); 1608 break; 1609 } 1610 break; 1611 1612 case EBUSY: 1613 (void) zfs_standard_error(hdl, EBUSY, errbuf); 1614 break; 1615 1616 case EROFS: 1617 (void) zfs_error(hdl, EZFS_DSREADONLY, errbuf); 1618 break; 1619 1620 case E2BIG: 1621 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1622 "property value too long")); 1623 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1624 break; 1625 1626 case ENOTSUP: 1627 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1628 "pool and or dataset must be upgraded to set this " 1629 "property or value")); 1630 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf); 1631 break; 1632 1633 case ERANGE: 1634 if (prop == ZFS_PROP_COMPRESSION || 1635 prop == ZFS_PROP_RECORDSIZE) { 1636 (void) zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1637 "property setting is not allowed on " 1638 "bootable datasets")); 1639 (void) zfs_error(hdl, EZFS_NOTSUP, errbuf); 1640 } else if (prop == ZFS_PROP_CHECKSUM || 1641 prop == ZFS_PROP_DEDUP) { 1642 (void) zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1643 "property setting is not allowed on " 1644 "root pools")); 1645 (void) zfs_error(hdl, EZFS_NOTSUP, errbuf); 1646 } else { 1647 (void) zfs_standard_error(hdl, err, errbuf); 1648 } 1649 break; 1650 1651 case EINVAL: 1652 if (prop == ZPROP_INVAL) { 1653 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1654 } else { 1655 (void) zfs_standard_error(hdl, err, errbuf); 1656 } 1657 break; 1658 1659 case EOVERFLOW: 1660 /* 1661 * This platform can't address a volume this big. 1662 */ 1663 #ifdef _ILP32 1664 if (prop == ZFS_PROP_VOLSIZE) { 1665 (void) zfs_error(hdl, EZFS_VOLTOOBIG, errbuf); 1666 break; 1667 } 1668 #endif 1669 /* FALLTHROUGH */ 1670 default: 1671 (void) zfs_standard_error(hdl, err, errbuf); 1672 } 1673 } 1674 1675 /* 1676 * Given a property name and value, set the property for the given dataset. 1677 */ 1678 int 1679 zfs_prop_set(zfs_handle_t *zhp, const char *propname, const char *propval) 1680 { 1681 int ret = -1; 1682 char errbuf[1024]; 1683 libzfs_handle_t *hdl = zhp->zfs_hdl; 1684 nvlist_t *nvl = NULL; 1685 1686 (void) snprintf(errbuf, sizeof (errbuf), 1687 dgettext(TEXT_DOMAIN, "cannot set property for '%s'"), 1688 zhp->zfs_name); 1689 1690 if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0 || 1691 nvlist_add_string(nvl, propname, propval) != 0) { 1692 (void) no_memory(hdl); 1693 goto error; 1694 } 1695 1696 ret = zfs_prop_set_list(zhp, nvl); 1697 1698 error: 1699 nvlist_free(nvl); 1700 return (ret); 1701 } 1702 1703 1704 1705 /* 1706 * Given an nvlist of property names and values, set the properties for the 1707 * given dataset. 1708 */ 1709 int 1710 zfs_prop_set_list(zfs_handle_t *zhp, nvlist_t *props) 1711 { 1712 zfs_cmd_t zc = { 0 }; 1713 int ret = -1; 1714 prop_changelist_t **cls = NULL; 1715 int cl_idx; 1716 char errbuf[1024]; 1717 libzfs_handle_t *hdl = zhp->zfs_hdl; 1718 nvlist_t *nvl; 1719 int nvl_len; 1720 int added_resv = 0; 1721 1722 (void) snprintf(errbuf, sizeof (errbuf), 1723 dgettext(TEXT_DOMAIN, "cannot set property for '%s'"), 1724 zhp->zfs_name); 1725 1726 if ((nvl = zfs_valid_proplist(hdl, zhp->zfs_type, props, 1727 zfs_prop_get_int(zhp, ZFS_PROP_ZONED), zhp, zhp->zpool_hdl, 1728 errbuf)) == NULL) 1729 goto error; 1730 1731 /* 1732 * We have to check for any extra properties which need to be added 1733 * before computing the length of the nvlist. 1734 */ 1735 for (nvpair_t *elem = nvlist_next_nvpair(nvl, NULL); 1736 elem != NULL; 1737 elem = nvlist_next_nvpair(nvl, elem)) { 1738 if (zfs_name_to_prop(nvpair_name(elem)) == ZFS_PROP_VOLSIZE && 1739 (added_resv = zfs_add_synthetic_resv(zhp, nvl)) == -1) { 1740 goto error; 1741 } 1742 } 1743 1744 if (added_resv != 1 && 1745 (added_resv = zfs_fix_auto_resv(zhp, nvl)) == -1) { 1746 goto error; 1747 } 1748 1749 /* 1750 * Check how many properties we're setting and allocate an array to 1751 * store changelist pointers for postfix(). 1752 */ 1753 nvl_len = 0; 1754 for (nvpair_t *elem = nvlist_next_nvpair(nvl, NULL); 1755 elem != NULL; 1756 elem = nvlist_next_nvpair(nvl, elem)) 1757 nvl_len++; 1758 if ((cls = calloc(nvl_len, sizeof (prop_changelist_t *))) == NULL) 1759 goto error; 1760 1761 cl_idx = 0; 1762 for (nvpair_t *elem = nvlist_next_nvpair(nvl, NULL); 1763 elem != NULL; 1764 elem = nvlist_next_nvpair(nvl, elem)) { 1765 1766 zfs_prop_t prop = zfs_name_to_prop(nvpair_name(elem)); 1767 1768 assert(cl_idx < nvl_len); 1769 /* 1770 * We don't want to unmount & remount the dataset when changing 1771 * its canmount property to 'on' or 'noauto'. We only use 1772 * the changelist logic to unmount when setting canmount=off. 1773 */ 1774 if (prop != ZFS_PROP_CANMOUNT || 1775 (fnvpair_value_uint64(elem) == ZFS_CANMOUNT_OFF && 1776 zfs_is_mounted(zhp, NULL))) { 1777 cls[cl_idx] = changelist_gather(zhp, prop, 0, 0); 1778 if (cls[cl_idx] == NULL) 1779 goto error; 1780 } 1781 1782 if (prop == ZFS_PROP_MOUNTPOINT && 1783 changelist_haszonedchild(cls[cl_idx])) { 1784 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1785 "child dataset with inherited mountpoint is used " 1786 "in a non-global zone")); 1787 ret = zfs_error(hdl, EZFS_ZONED, errbuf); 1788 goto error; 1789 } 1790 1791 if (cls[cl_idx] != NULL && 1792 (ret = changelist_prefix(cls[cl_idx])) != 0) 1793 goto error; 1794 1795 cl_idx++; 1796 } 1797 assert(cl_idx == nvl_len); 1798 1799 /* 1800 * Execute the corresponding ioctl() to set this list of properties. 1801 */ 1802 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 1803 1804 if ((ret = zcmd_write_src_nvlist(hdl, &zc, nvl)) != 0 || 1805 (ret = zcmd_alloc_dst_nvlist(hdl, &zc, 0)) != 0) 1806 goto error; 1807 1808 ret = zfs_ioctl(hdl, ZFS_IOC_SET_PROP, &zc); 1809 1810 if (ret != 0) { 1811 /* Get the list of unset properties back and report them. */ 1812 nvlist_t *errorprops = NULL; 1813 if (zcmd_read_dst_nvlist(hdl, &zc, &errorprops) != 0) 1814 goto error; 1815 for (nvpair_t *elem = nvlist_next_nvpair(nvl, NULL); 1816 elem != NULL; 1817 elem = nvlist_next_nvpair(nvl, elem)) { 1818 zfs_prop_t prop = zfs_name_to_prop(nvpair_name(elem)); 1819 zfs_setprop_error(hdl, prop, errno, errbuf); 1820 } 1821 nvlist_free(errorprops); 1822 1823 if (added_resv && errno == ENOSPC) { 1824 /* clean up the volsize property we tried to set */ 1825 uint64_t old_volsize = zfs_prop_get_int(zhp, 1826 ZFS_PROP_VOLSIZE); 1827 nvlist_free(nvl); 1828 nvl = NULL; 1829 zcmd_free_nvlists(&zc); 1830 1831 if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0) 1832 goto error; 1833 if (nvlist_add_uint64(nvl, 1834 zfs_prop_to_name(ZFS_PROP_VOLSIZE), 1835 old_volsize) != 0) 1836 goto error; 1837 if (zcmd_write_src_nvlist(hdl, &zc, nvl) != 0) 1838 goto error; 1839 (void) zfs_ioctl(hdl, ZFS_IOC_SET_PROP, &zc); 1840 } 1841 } else { 1842 for (cl_idx = 0; cl_idx < nvl_len; cl_idx++) { 1843 if (cls[cl_idx] != NULL) { 1844 int clp_err = changelist_postfix(cls[cl_idx]); 1845 if (clp_err != 0) 1846 ret = clp_err; 1847 } 1848 } 1849 1850 /* 1851 * Refresh the statistics so the new property value 1852 * is reflected. 1853 */ 1854 if (ret == 0) 1855 (void) get_stats(zhp); 1856 } 1857 1858 error: 1859 nvlist_free(nvl); 1860 zcmd_free_nvlists(&zc); 1861 if (cls != NULL) { 1862 for (cl_idx = 0; cl_idx < nvl_len; cl_idx++) { 1863 if (cls[cl_idx] != NULL) 1864 changelist_free(cls[cl_idx]); 1865 } 1866 free(cls); 1867 } 1868 return (ret); 1869 } 1870 1871 /* 1872 * Given a property, inherit the value from the parent dataset, or if received 1873 * is TRUE, revert to the received value, if any. 1874 */ 1875 int 1876 zfs_prop_inherit(zfs_handle_t *zhp, const char *propname, boolean_t received) 1877 { 1878 zfs_cmd_t zc = { 0 }; 1879 int ret; 1880 prop_changelist_t *cl; 1881 libzfs_handle_t *hdl = zhp->zfs_hdl; 1882 char errbuf[1024]; 1883 zfs_prop_t prop; 1884 1885 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 1886 "cannot inherit %s for '%s'"), propname, zhp->zfs_name); 1887 1888 zc.zc_cookie = received; 1889 if ((prop = zfs_name_to_prop(propname)) == ZPROP_INVAL) { 1890 /* 1891 * For user properties, the amount of work we have to do is very 1892 * small, so just do it here. 1893 */ 1894 if (!zfs_prop_user(propname)) { 1895 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1896 "invalid property")); 1897 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 1898 } 1899 1900 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 1901 (void) strlcpy(zc.zc_value, propname, sizeof (zc.zc_value)); 1902 1903 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_INHERIT_PROP, &zc) != 0) 1904 return (zfs_standard_error(hdl, errno, errbuf)); 1905 1906 return (0); 1907 } 1908 1909 /* 1910 * Verify that this property is inheritable. 1911 */ 1912 if (zfs_prop_readonly(prop)) 1913 return (zfs_error(hdl, EZFS_PROPREADONLY, errbuf)); 1914 1915 if (!zfs_prop_inheritable(prop) && !received) 1916 return (zfs_error(hdl, EZFS_PROPNONINHERIT, errbuf)); 1917 1918 /* 1919 * Check to see if the value applies to this type 1920 */ 1921 if (!zfs_prop_valid_for_type(prop, zhp->zfs_type)) 1922 return (zfs_error(hdl, EZFS_PROPTYPE, errbuf)); 1923 1924 /* 1925 * Normalize the name, to get rid of shorthand abbreviations. 1926 */ 1927 propname = zfs_prop_to_name(prop); 1928 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 1929 (void) strlcpy(zc.zc_value, propname, sizeof (zc.zc_value)); 1930 1931 if (prop == ZFS_PROP_MOUNTPOINT && getzoneid() == GLOBAL_ZONEID && 1932 zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) { 1933 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1934 "dataset is used in a non-global zone")); 1935 return (zfs_error(hdl, EZFS_ZONED, errbuf)); 1936 } 1937 1938 /* 1939 * Determine datasets which will be affected by this change, if any. 1940 */ 1941 if ((cl = changelist_gather(zhp, prop, 0, 0)) == NULL) 1942 return (-1); 1943 1944 if (prop == ZFS_PROP_MOUNTPOINT && changelist_haszonedchild(cl)) { 1945 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1946 "child dataset with inherited mountpoint is used " 1947 "in a non-global zone")); 1948 ret = zfs_error(hdl, EZFS_ZONED, errbuf); 1949 goto error; 1950 } 1951 1952 if ((ret = changelist_prefix(cl)) != 0) 1953 goto error; 1954 1955 if ((ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_INHERIT_PROP, &zc)) != 0) { 1956 return (zfs_standard_error(hdl, errno, errbuf)); 1957 } else { 1958 1959 if ((ret = changelist_postfix(cl)) != 0) 1960 goto error; 1961 1962 /* 1963 * Refresh the statistics so the new property is reflected. 1964 */ 1965 (void) get_stats(zhp); 1966 } 1967 1968 error: 1969 changelist_free(cl); 1970 return (ret); 1971 } 1972 1973 /* 1974 * True DSL properties are stored in an nvlist. The following two functions 1975 * extract them appropriately. 1976 */ 1977 static uint64_t 1978 getprop_uint64(zfs_handle_t *zhp, zfs_prop_t prop, char **source) 1979 { 1980 nvlist_t *nv; 1981 uint64_t value; 1982 1983 *source = NULL; 1984 if (nvlist_lookup_nvlist(zhp->zfs_props, 1985 zfs_prop_to_name(prop), &nv) == 0) { 1986 verify(nvlist_lookup_uint64(nv, ZPROP_VALUE, &value) == 0); 1987 (void) nvlist_lookup_string(nv, ZPROP_SOURCE, source); 1988 } else { 1989 verify(!zhp->zfs_props_table || 1990 zhp->zfs_props_table[prop] == B_TRUE); 1991 value = zfs_prop_default_numeric(prop); 1992 *source = ""; 1993 } 1994 1995 return (value); 1996 } 1997 1998 static const char * 1999 getprop_string(zfs_handle_t *zhp, zfs_prop_t prop, char **source) 2000 { 2001 nvlist_t *nv; 2002 const char *value; 2003 2004 *source = NULL; 2005 if (nvlist_lookup_nvlist(zhp->zfs_props, 2006 zfs_prop_to_name(prop), &nv) == 0) { 2007 value = fnvlist_lookup_string(nv, ZPROP_VALUE); 2008 (void) nvlist_lookup_string(nv, ZPROP_SOURCE, source); 2009 } else { 2010 verify(!zhp->zfs_props_table || 2011 zhp->zfs_props_table[prop] == B_TRUE); 2012 value = zfs_prop_default_string(prop); 2013 *source = ""; 2014 } 2015 2016 return (value); 2017 } 2018 2019 static boolean_t 2020 zfs_is_recvd_props_mode(zfs_handle_t *zhp) 2021 { 2022 return (zhp->zfs_props == zhp->zfs_recvd_props); 2023 } 2024 2025 static void 2026 zfs_set_recvd_props_mode(zfs_handle_t *zhp, uint64_t *cookie) 2027 { 2028 *cookie = (uint64_t)(uintptr_t)zhp->zfs_props; 2029 zhp->zfs_props = zhp->zfs_recvd_props; 2030 } 2031 2032 static void 2033 zfs_unset_recvd_props_mode(zfs_handle_t *zhp, uint64_t *cookie) 2034 { 2035 zhp->zfs_props = (nvlist_t *)(uintptr_t)*cookie; 2036 *cookie = 0; 2037 } 2038 2039 /* 2040 * Internal function for getting a numeric property. Both zfs_prop_get() and 2041 * zfs_prop_get_int() are built using this interface. 2042 * 2043 * Certain properties can be overridden using 'mount -o'. In this case, scan 2044 * the contents of the /etc/mnttab entry, searching for the appropriate options. 2045 * If they differ from the on-disk values, report the current values and mark 2046 * the source "temporary". 2047 */ 2048 static int 2049 get_numeric_property(zfs_handle_t *zhp, zfs_prop_t prop, zprop_source_t *src, 2050 char **source, uint64_t *val) 2051 { 2052 zfs_cmd_t zc = { 0 }; 2053 nvlist_t *zplprops = NULL; 2054 struct mnttab mnt; 2055 char *mntopt_on = NULL; 2056 char *mntopt_off = NULL; 2057 boolean_t received = zfs_is_recvd_props_mode(zhp); 2058 2059 *source = NULL; 2060 2061 switch (prop) { 2062 case ZFS_PROP_ATIME: 2063 mntopt_on = MNTOPT_ATIME; 2064 mntopt_off = MNTOPT_NOATIME; 2065 break; 2066 2067 case ZFS_PROP_DEVICES: 2068 mntopt_on = MNTOPT_DEVICES; 2069 mntopt_off = MNTOPT_NODEVICES; 2070 break; 2071 2072 case ZFS_PROP_EXEC: 2073 mntopt_on = MNTOPT_EXEC; 2074 mntopt_off = MNTOPT_NOEXEC; 2075 break; 2076 2077 case ZFS_PROP_READONLY: 2078 mntopt_on = MNTOPT_RO; 2079 mntopt_off = MNTOPT_RW; 2080 break; 2081 2082 case ZFS_PROP_SETUID: 2083 mntopt_on = MNTOPT_SETUID; 2084 mntopt_off = MNTOPT_NOSETUID; 2085 break; 2086 2087 case ZFS_PROP_XATTR: 2088 mntopt_on = MNTOPT_XATTR; 2089 mntopt_off = MNTOPT_NOXATTR; 2090 break; 2091 2092 case ZFS_PROP_NBMAND: 2093 mntopt_on = MNTOPT_NBMAND; 2094 mntopt_off = MNTOPT_NONBMAND; 2095 break; 2096 2097 default: 2098 break; 2099 } 2100 2101 /* 2102 * Because looking up the mount options is potentially expensive 2103 * (iterating over all of /etc/mnttab), we defer its calculation until 2104 * we're looking up a property which requires its presence. 2105 */ 2106 if (!zhp->zfs_mntcheck && 2107 (mntopt_on != NULL || prop == ZFS_PROP_MOUNTED)) { 2108 libzfs_handle_t *hdl = zhp->zfs_hdl; 2109 struct mnttab entry; 2110 2111 if (libzfs_mnttab_find(hdl, zhp->zfs_name, &entry) == 0) { 2112 zhp->zfs_mntopts = zfs_strdup(hdl, 2113 entry.mnt_mntopts); 2114 if (zhp->zfs_mntopts == NULL) 2115 return (-1); 2116 } 2117 2118 zhp->zfs_mntcheck = B_TRUE; 2119 } 2120 2121 if (zhp->zfs_mntopts == NULL) 2122 mnt.mnt_mntopts = ""; 2123 else 2124 mnt.mnt_mntopts = zhp->zfs_mntopts; 2125 2126 switch (prop) { 2127 case ZFS_PROP_ATIME: 2128 case ZFS_PROP_DEVICES: 2129 case ZFS_PROP_EXEC: 2130 case ZFS_PROP_READONLY: 2131 case ZFS_PROP_SETUID: 2132 case ZFS_PROP_XATTR: 2133 case ZFS_PROP_NBMAND: 2134 *val = getprop_uint64(zhp, prop, source); 2135 2136 if (received) 2137 break; 2138 2139 if (hasmntopt(&mnt, mntopt_on) && !*val) { 2140 *val = B_TRUE; 2141 if (src) 2142 *src = ZPROP_SRC_TEMPORARY; 2143 } else if (hasmntopt(&mnt, mntopt_off) && *val) { 2144 *val = B_FALSE; 2145 if (src) 2146 *src = ZPROP_SRC_TEMPORARY; 2147 } 2148 break; 2149 2150 case ZFS_PROP_CANMOUNT: 2151 case ZFS_PROP_VOLSIZE: 2152 case ZFS_PROP_QUOTA: 2153 case ZFS_PROP_REFQUOTA: 2154 case ZFS_PROP_RESERVATION: 2155 case ZFS_PROP_REFRESERVATION: 2156 case ZFS_PROP_FILESYSTEM_LIMIT: 2157 case ZFS_PROP_SNAPSHOT_LIMIT: 2158 case ZFS_PROP_FILESYSTEM_COUNT: 2159 case ZFS_PROP_SNAPSHOT_COUNT: 2160 *val = getprop_uint64(zhp, prop, source); 2161 2162 if (*source == NULL) { 2163 /* not default, must be local */ 2164 *source = zhp->zfs_name; 2165 } 2166 break; 2167 2168 case ZFS_PROP_MOUNTED: 2169 *val = (zhp->zfs_mntopts != NULL); 2170 break; 2171 2172 case ZFS_PROP_NUMCLONES: 2173 *val = zhp->zfs_dmustats.dds_num_clones; 2174 break; 2175 2176 case ZFS_PROP_VERSION: 2177 case ZFS_PROP_NORMALIZE: 2178 case ZFS_PROP_UTF8ONLY: 2179 case ZFS_PROP_CASE: 2180 if (!zfs_prop_valid_for_type(prop, zhp->zfs_head_type) || 2181 zcmd_alloc_dst_nvlist(zhp->zfs_hdl, &zc, 0) != 0) 2182 return (-1); 2183 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 2184 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_OBJSET_ZPLPROPS, &zc)) { 2185 zcmd_free_nvlists(&zc); 2186 return (-1); 2187 } 2188 if (zcmd_read_dst_nvlist(zhp->zfs_hdl, &zc, &zplprops) != 0 || 2189 nvlist_lookup_uint64(zplprops, zfs_prop_to_name(prop), 2190 val) != 0) { 2191 zcmd_free_nvlists(&zc); 2192 return (-1); 2193 } 2194 nvlist_free(zplprops); 2195 zcmd_free_nvlists(&zc); 2196 break; 2197 2198 case ZFS_PROP_INCONSISTENT: 2199 *val = zhp->zfs_dmustats.dds_inconsistent; 2200 break; 2201 2202 default: 2203 switch (zfs_prop_get_type(prop)) { 2204 case PROP_TYPE_NUMBER: 2205 case PROP_TYPE_INDEX: 2206 *val = getprop_uint64(zhp, prop, source); 2207 /* 2208 * If we tried to use a default value for a 2209 * readonly property, it means that it was not 2210 * present. Note this only applies to "truly" 2211 * readonly properties, not set-once properties 2212 * like volblocksize. 2213 */ 2214 if (zfs_prop_readonly(prop) && 2215 !zfs_prop_setonce(prop) && 2216 *source != NULL && (*source)[0] == '\0') { 2217 *source = NULL; 2218 return (-1); 2219 } 2220 break; 2221 2222 case PROP_TYPE_STRING: 2223 default: 2224 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN, 2225 "cannot get non-numeric property")); 2226 return (zfs_error(zhp->zfs_hdl, EZFS_BADPROP, 2227 dgettext(TEXT_DOMAIN, "internal error"))); 2228 } 2229 } 2230 2231 return (0); 2232 } 2233 2234 /* 2235 * Calculate the source type, given the raw source string. 2236 */ 2237 static void 2238 get_source(zfs_handle_t *zhp, zprop_source_t *srctype, char *source, 2239 char *statbuf, size_t statlen) 2240 { 2241 if (statbuf == NULL || *srctype == ZPROP_SRC_TEMPORARY) 2242 return; 2243 2244 if (source == NULL) { 2245 *srctype = ZPROP_SRC_NONE; 2246 } else if (source[0] == '\0') { 2247 *srctype = ZPROP_SRC_DEFAULT; 2248 } else if (strstr(source, ZPROP_SOURCE_VAL_RECVD) != NULL) { 2249 *srctype = ZPROP_SRC_RECEIVED; 2250 } else { 2251 if (strcmp(source, zhp->zfs_name) == 0) { 2252 *srctype = ZPROP_SRC_LOCAL; 2253 } else { 2254 (void) strlcpy(statbuf, source, statlen); 2255 *srctype = ZPROP_SRC_INHERITED; 2256 } 2257 } 2258 2259 } 2260 2261 int 2262 zfs_prop_get_recvd(zfs_handle_t *zhp, const char *propname, char *propbuf, 2263 size_t proplen, boolean_t literal) 2264 { 2265 zfs_prop_t prop; 2266 int err = 0; 2267 2268 if (zhp->zfs_recvd_props == NULL) 2269 if (get_recvd_props_ioctl(zhp) != 0) 2270 return (-1); 2271 2272 prop = zfs_name_to_prop(propname); 2273 2274 if (prop != ZPROP_INVAL) { 2275 uint64_t cookie; 2276 if (!nvlist_exists(zhp->zfs_recvd_props, propname)) 2277 return (-1); 2278 zfs_set_recvd_props_mode(zhp, &cookie); 2279 err = zfs_prop_get(zhp, prop, propbuf, proplen, 2280 NULL, NULL, 0, literal); 2281 zfs_unset_recvd_props_mode(zhp, &cookie); 2282 } else { 2283 nvlist_t *propval; 2284 char *recvdval; 2285 if (nvlist_lookup_nvlist(zhp->zfs_recvd_props, 2286 propname, &propval) != 0) 2287 return (-1); 2288 verify(nvlist_lookup_string(propval, ZPROP_VALUE, 2289 &recvdval) == 0); 2290 (void) strlcpy(propbuf, recvdval, proplen); 2291 } 2292 2293 return (err == 0 ? 0 : -1); 2294 } 2295 2296 static int 2297 get_clones_string(zfs_handle_t *zhp, char *propbuf, size_t proplen) 2298 { 2299 nvlist_t *value; 2300 nvpair_t *pair; 2301 2302 value = zfs_get_clones_nvl(zhp); 2303 if (value == NULL) 2304 return (-1); 2305 2306 propbuf[0] = '\0'; 2307 for (pair = nvlist_next_nvpair(value, NULL); pair != NULL; 2308 pair = nvlist_next_nvpair(value, pair)) { 2309 if (propbuf[0] != '\0') 2310 (void) strlcat(propbuf, ",", proplen); 2311 (void) strlcat(propbuf, nvpair_name(pair), proplen); 2312 } 2313 2314 return (0); 2315 } 2316 2317 struct get_clones_arg { 2318 uint64_t numclones; 2319 nvlist_t *value; 2320 const char *origin; 2321 char buf[ZFS_MAX_DATASET_NAME_LEN]; 2322 }; 2323 2324 int 2325 get_clones_cb(zfs_handle_t *zhp, void *arg) 2326 { 2327 struct get_clones_arg *gca = arg; 2328 2329 if (gca->numclones == 0) { 2330 zfs_close(zhp); 2331 return (0); 2332 } 2333 2334 if (zfs_prop_get(zhp, ZFS_PROP_ORIGIN, gca->buf, sizeof (gca->buf), 2335 NULL, NULL, 0, B_TRUE) != 0) 2336 goto out; 2337 if (strcmp(gca->buf, gca->origin) == 0) { 2338 fnvlist_add_boolean(gca->value, zfs_get_name(zhp)); 2339 gca->numclones--; 2340 } 2341 2342 out: 2343 (void) zfs_iter_children(zhp, get_clones_cb, gca); 2344 zfs_close(zhp); 2345 return (0); 2346 } 2347 2348 nvlist_t * 2349 zfs_get_clones_nvl(zfs_handle_t *zhp) 2350 { 2351 nvlist_t *nv, *value; 2352 2353 if (nvlist_lookup_nvlist(zhp->zfs_props, 2354 zfs_prop_to_name(ZFS_PROP_CLONES), &nv) != 0) { 2355 struct get_clones_arg gca; 2356 2357 /* 2358 * if this is a snapshot, then the kernel wasn't able 2359 * to get the clones. Do it by slowly iterating. 2360 */ 2361 if (zhp->zfs_type != ZFS_TYPE_SNAPSHOT) 2362 return (NULL); 2363 if (nvlist_alloc(&nv, NV_UNIQUE_NAME, 0) != 0) 2364 return (NULL); 2365 if (nvlist_alloc(&value, NV_UNIQUE_NAME, 0) != 0) { 2366 nvlist_free(nv); 2367 return (NULL); 2368 } 2369 2370 gca.numclones = zfs_prop_get_int(zhp, ZFS_PROP_NUMCLONES); 2371 gca.value = value; 2372 gca.origin = zhp->zfs_name; 2373 2374 if (gca.numclones != 0) { 2375 zfs_handle_t *root; 2376 char pool[ZFS_MAX_DATASET_NAME_LEN]; 2377 char *cp = pool; 2378 2379 /* get the pool name */ 2380 (void) strlcpy(pool, zhp->zfs_name, sizeof (pool)); 2381 (void) strsep(&cp, "/@"); 2382 root = zfs_open(zhp->zfs_hdl, pool, 2383 ZFS_TYPE_FILESYSTEM); 2384 2385 (void) get_clones_cb(root, &gca); 2386 } 2387 2388 if (gca.numclones != 0 || 2389 nvlist_add_nvlist(nv, ZPROP_VALUE, value) != 0 || 2390 nvlist_add_nvlist(zhp->zfs_props, 2391 zfs_prop_to_name(ZFS_PROP_CLONES), nv) != 0) { 2392 nvlist_free(nv); 2393 nvlist_free(value); 2394 return (NULL); 2395 } 2396 nvlist_free(nv); 2397 nvlist_free(value); 2398 verify(0 == nvlist_lookup_nvlist(zhp->zfs_props, 2399 zfs_prop_to_name(ZFS_PROP_CLONES), &nv)); 2400 } 2401 2402 verify(nvlist_lookup_nvlist(nv, ZPROP_VALUE, &value) == 0); 2403 2404 return (value); 2405 } 2406 2407 /* 2408 * Accepts a property and value and checks that the value 2409 * matches the one found by the channel program. If they are 2410 * not equal, print both of them. 2411 */ 2412 void 2413 zcp_check(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t intval, 2414 const char *strval) 2415 { 2416 if (!zhp->zfs_hdl->libzfs_prop_debug) 2417 return; 2418 int error; 2419 char *poolname = zhp->zpool_hdl->zpool_name; 2420 const char *program = 2421 "args = ...\n" 2422 "ds = args['dataset']\n" 2423 "prop = args['property']\n" 2424 "value, setpoint = zfs.get_prop(ds, prop)\n" 2425 "return {value=value, setpoint=setpoint}\n"; 2426 nvlist_t *outnvl; 2427 nvlist_t *retnvl; 2428 nvlist_t *argnvl = fnvlist_alloc(); 2429 2430 fnvlist_add_string(argnvl, "dataset", zhp->zfs_name); 2431 fnvlist_add_string(argnvl, "property", zfs_prop_to_name(prop)); 2432 2433 error = lzc_channel_program_nosync(poolname, program, 2434 10 * 1000 * 1000, 10 * 1024 * 1024, argnvl, &outnvl); 2435 2436 if (error == 0) { 2437 retnvl = fnvlist_lookup_nvlist(outnvl, "return"); 2438 if (zfs_prop_get_type(prop) == PROP_TYPE_NUMBER) { 2439 int64_t ans; 2440 error = nvlist_lookup_int64(retnvl, "value", &ans); 2441 if (error != 0) { 2442 (void) fprintf(stderr, "zcp check error: %u\n", 2443 error); 2444 return; 2445 } 2446 if (ans != intval) { 2447 (void) fprintf(stderr, 2448 "%s: zfs found %lld, but zcp found %lld\n", 2449 zfs_prop_to_name(prop), 2450 (longlong_t)intval, (longlong_t)ans); 2451 } 2452 } else { 2453 char *str_ans; 2454 error = nvlist_lookup_string(retnvl, "value", &str_ans); 2455 if (error != 0) { 2456 (void) fprintf(stderr, "zcp check error: %u\n", 2457 error); 2458 return; 2459 } 2460 if (strcmp(strval, str_ans) != 0) { 2461 (void) fprintf(stderr, 2462 "%s: zfs found %s, but zcp found %s\n", 2463 zfs_prop_to_name(prop), 2464 strval, str_ans); 2465 } 2466 } 2467 } else { 2468 (void) fprintf(stderr, 2469 "zcp check failed, channel program error: %u\n", error); 2470 } 2471 nvlist_free(argnvl); 2472 nvlist_free(outnvl); 2473 } 2474 2475 /* 2476 * Retrieve a property from the given object. If 'literal' is specified, then 2477 * numbers are left as exact values. Otherwise, numbers are converted to a 2478 * human-readable form. 2479 * 2480 * Returns 0 on success, or -1 on error. 2481 */ 2482 int 2483 zfs_prop_get(zfs_handle_t *zhp, zfs_prop_t prop, char *propbuf, size_t proplen, 2484 zprop_source_t *src, char *statbuf, size_t statlen, boolean_t literal) 2485 { 2486 char *source = NULL; 2487 uint64_t val; 2488 const char *str; 2489 const char *strval; 2490 boolean_t received = zfs_is_recvd_props_mode(zhp); 2491 2492 /* 2493 * Check to see if this property applies to our object 2494 */ 2495 if (!zfs_prop_valid_for_type(prop, zhp->zfs_type)) 2496 return (-1); 2497 2498 if (received && zfs_prop_readonly(prop)) 2499 return (-1); 2500 2501 if (src) 2502 *src = ZPROP_SRC_NONE; 2503 2504 switch (prop) { 2505 case ZFS_PROP_CREATION: 2506 /* 2507 * 'creation' is a time_t stored in the statistics. We convert 2508 * this into a string unless 'literal' is specified. 2509 */ 2510 { 2511 val = getprop_uint64(zhp, prop, &source); 2512 time_t time = (time_t)val; 2513 struct tm t; 2514 2515 if (literal || 2516 localtime_r(&time, &t) == NULL || 2517 strftime(propbuf, proplen, "%a %b %e %k:%M %Y", 2518 &t) == 0) 2519 (void) snprintf(propbuf, proplen, "%llu", val); 2520 } 2521 zcp_check(zhp, prop, val, NULL); 2522 break; 2523 2524 case ZFS_PROP_MOUNTPOINT: 2525 /* 2526 * Getting the precise mountpoint can be tricky. 2527 * 2528 * - for 'none' or 'legacy', return those values. 2529 * - for inherited mountpoints, we want to take everything 2530 * after our ancestor and append it to the inherited value. 2531 * 2532 * If the pool has an alternate root, we want to prepend that 2533 * root to any values we return. 2534 */ 2535 2536 str = getprop_string(zhp, prop, &source); 2537 2538 if (str[0] == '/') { 2539 char buf[MAXPATHLEN]; 2540 char *root = buf; 2541 const char *relpath; 2542 2543 /* 2544 * If we inherit the mountpoint, even from a dataset 2545 * with a received value, the source will be the path of 2546 * the dataset we inherit from. If source is 2547 * ZPROP_SOURCE_VAL_RECVD, the received value is not 2548 * inherited. 2549 */ 2550 if (strcmp(source, ZPROP_SOURCE_VAL_RECVD) == 0) { 2551 relpath = ""; 2552 } else { 2553 relpath = zhp->zfs_name + strlen(source); 2554 if (relpath[0] == '/') 2555 relpath++; 2556 } 2557 2558 if ((zpool_get_prop(zhp->zpool_hdl, 2559 ZPOOL_PROP_ALTROOT, buf, MAXPATHLEN, NULL, 2560 B_FALSE)) || (strcmp(root, "-") == 0)) 2561 root[0] = '\0'; 2562 /* 2563 * Special case an alternate root of '/'. This will 2564 * avoid having multiple leading slashes in the 2565 * mountpoint path. 2566 */ 2567 if (strcmp(root, "/") == 0) 2568 root++; 2569 2570 /* 2571 * If the mountpoint is '/' then skip over this 2572 * if we are obtaining either an alternate root or 2573 * an inherited mountpoint. 2574 */ 2575 if (str[1] == '\0' && (root[0] != '\0' || 2576 relpath[0] != '\0')) 2577 str++; 2578 2579 if (relpath[0] == '\0') 2580 (void) snprintf(propbuf, proplen, "%s%s", 2581 root, str); 2582 else 2583 (void) snprintf(propbuf, proplen, "%s%s%s%s", 2584 root, str, relpath[0] == '@' ? "" : "/", 2585 relpath); 2586 } else { 2587 /* 'legacy' or 'none' */ 2588 (void) strlcpy(propbuf, str, proplen); 2589 } 2590 zcp_check(zhp, prop, NULL, propbuf); 2591 break; 2592 2593 case ZFS_PROP_ORIGIN: 2594 str = getprop_string(zhp, prop, &source); 2595 if (str == NULL) 2596 return (-1); 2597 (void) strlcpy(propbuf, str, proplen); 2598 zcp_check(zhp, prop, NULL, str); 2599 break; 2600 2601 case ZFS_PROP_CLONES: 2602 if (get_clones_string(zhp, propbuf, proplen) != 0) 2603 return (-1); 2604 break; 2605 2606 case ZFS_PROP_QUOTA: 2607 case ZFS_PROP_REFQUOTA: 2608 case ZFS_PROP_RESERVATION: 2609 case ZFS_PROP_REFRESERVATION: 2610 2611 if (get_numeric_property(zhp, prop, src, &source, &val) != 0) 2612 return (-1); 2613 /* 2614 * If quota or reservation is 0, we translate this into 'none' 2615 * (unless literal is set), and indicate that it's the default 2616 * value. Otherwise, we print the number nicely and indicate 2617 * that its set locally. 2618 */ 2619 if (val == 0) { 2620 if (literal) 2621 (void) strlcpy(propbuf, "0", proplen); 2622 else 2623 (void) strlcpy(propbuf, "none", proplen); 2624 } else { 2625 if (literal) 2626 (void) snprintf(propbuf, proplen, "%llu", 2627 (u_longlong_t)val); 2628 else 2629 zfs_nicenum(val, propbuf, proplen); 2630 } 2631 zcp_check(zhp, prop, val, NULL); 2632 break; 2633 2634 case ZFS_PROP_FILESYSTEM_LIMIT: 2635 case ZFS_PROP_SNAPSHOT_LIMIT: 2636 case ZFS_PROP_FILESYSTEM_COUNT: 2637 case ZFS_PROP_SNAPSHOT_COUNT: 2638 2639 if (get_numeric_property(zhp, prop, src, &source, &val) != 0) 2640 return (-1); 2641 2642 /* 2643 * If limit is UINT64_MAX, we translate this into 'none' (unless 2644 * literal is set), and indicate that it's the default value. 2645 * Otherwise, we print the number nicely and indicate that it's 2646 * set locally. 2647 */ 2648 if (literal) { 2649 (void) snprintf(propbuf, proplen, "%llu", 2650 (u_longlong_t)val); 2651 } else if (val == UINT64_MAX) { 2652 (void) strlcpy(propbuf, "none", proplen); 2653 } else { 2654 zfs_nicenum(val, propbuf, proplen); 2655 } 2656 2657 zcp_check(zhp, prop, val, NULL); 2658 break; 2659 2660 case ZFS_PROP_REFRATIO: 2661 case ZFS_PROP_COMPRESSRATIO: 2662 if (get_numeric_property(zhp, prop, src, &source, &val) != 0) 2663 return (-1); 2664 (void) snprintf(propbuf, proplen, "%llu.%02llux", 2665 (u_longlong_t)(val / 100), 2666 (u_longlong_t)(val % 100)); 2667 zcp_check(zhp, prop, val, NULL); 2668 break; 2669 2670 case ZFS_PROP_TYPE: 2671 switch (zhp->zfs_type) { 2672 case ZFS_TYPE_FILESYSTEM: 2673 str = "filesystem"; 2674 break; 2675 case ZFS_TYPE_VOLUME: 2676 str = "volume"; 2677 break; 2678 case ZFS_TYPE_SNAPSHOT: 2679 str = "snapshot"; 2680 break; 2681 case ZFS_TYPE_BOOKMARK: 2682 str = "bookmark"; 2683 break; 2684 default: 2685 abort(); 2686 } 2687 (void) snprintf(propbuf, proplen, "%s", str); 2688 zcp_check(zhp, prop, NULL, propbuf); 2689 break; 2690 2691 case ZFS_PROP_MOUNTED: 2692 /* 2693 * The 'mounted' property is a pseudo-property that described 2694 * whether the filesystem is currently mounted. Even though 2695 * it's a boolean value, the typical values of "on" and "off" 2696 * don't make sense, so we translate to "yes" and "no". 2697 */ 2698 if (get_numeric_property(zhp, ZFS_PROP_MOUNTED, 2699 src, &source, &val) != 0) 2700 return (-1); 2701 if (val) 2702 (void) strlcpy(propbuf, "yes", proplen); 2703 else 2704 (void) strlcpy(propbuf, "no", proplen); 2705 break; 2706 2707 case ZFS_PROP_NAME: 2708 /* 2709 * The 'name' property is a pseudo-property derived from the 2710 * dataset name. It is presented as a real property to simplify 2711 * consumers. 2712 */ 2713 (void) strlcpy(propbuf, zhp->zfs_name, proplen); 2714 zcp_check(zhp, prop, NULL, propbuf); 2715 break; 2716 2717 case ZFS_PROP_MLSLABEL: 2718 { 2719 m_label_t *new_sl = NULL; 2720 char *ascii = NULL; /* human readable label */ 2721 2722 (void) strlcpy(propbuf, 2723 getprop_string(zhp, prop, &source), proplen); 2724 2725 if (literal || (strcasecmp(propbuf, 2726 ZFS_MLSLABEL_DEFAULT) == 0)) 2727 break; 2728 2729 /* 2730 * Try to translate the internal hex string to 2731 * human-readable output. If there are any 2732 * problems just use the hex string. 2733 */ 2734 2735 if (str_to_label(propbuf, &new_sl, MAC_LABEL, 2736 L_NO_CORRECTION, NULL) == -1) { 2737 m_label_free(new_sl); 2738 break; 2739 } 2740 2741 if (label_to_str(new_sl, &ascii, M_LABEL, 2742 DEF_NAMES) != 0) { 2743 if (ascii) 2744 free(ascii); 2745 m_label_free(new_sl); 2746 break; 2747 } 2748 m_label_free(new_sl); 2749 2750 (void) strlcpy(propbuf, ascii, proplen); 2751 free(ascii); 2752 } 2753 break; 2754 2755 case ZFS_PROP_GUID: 2756 /* 2757 * GUIDs are stored as numbers, but they are identifiers. 2758 * We don't want them to be pretty printed, because pretty 2759 * printing mangles the ID into a truncated and useless value. 2760 */ 2761 if (get_numeric_property(zhp, prop, src, &source, &val) != 0) 2762 return (-1); 2763 (void) snprintf(propbuf, proplen, "%llu", (u_longlong_t)val); 2764 zcp_check(zhp, prop, val, NULL); 2765 break; 2766 2767 default: 2768 switch (zfs_prop_get_type(prop)) { 2769 case PROP_TYPE_NUMBER: 2770 if (get_numeric_property(zhp, prop, src, 2771 &source, &val) != 0) { 2772 return (-1); 2773 } 2774 2775 if (literal) { 2776 (void) snprintf(propbuf, proplen, "%llu", 2777 (u_longlong_t)val); 2778 } else { 2779 zfs_nicenum(val, propbuf, proplen); 2780 } 2781 zcp_check(zhp, prop, val, NULL); 2782 break; 2783 2784 case PROP_TYPE_STRING: 2785 str = getprop_string(zhp, prop, &source); 2786 if (str == NULL) 2787 return (-1); 2788 2789 (void) strlcpy(propbuf, str, proplen); 2790 zcp_check(zhp, prop, NULL, str); 2791 break; 2792 2793 case PROP_TYPE_INDEX: 2794 if (get_numeric_property(zhp, prop, src, 2795 &source, &val) != 0) 2796 return (-1); 2797 if (zfs_prop_index_to_string(prop, val, &strval) != 0) 2798 return (-1); 2799 2800 (void) strlcpy(propbuf, strval, proplen); 2801 zcp_check(zhp, prop, NULL, strval); 2802 break; 2803 2804 default: 2805 abort(); 2806 } 2807 } 2808 2809 get_source(zhp, src, source, statbuf, statlen); 2810 2811 return (0); 2812 } 2813 2814 /* 2815 * Utility function to get the given numeric property. Does no validation that 2816 * the given property is the appropriate type; should only be used with 2817 * hard-coded property types. 2818 */ 2819 uint64_t 2820 zfs_prop_get_int(zfs_handle_t *zhp, zfs_prop_t prop) 2821 { 2822 char *source; 2823 uint64_t val; 2824 2825 (void) get_numeric_property(zhp, prop, NULL, &source, &val); 2826 2827 return (val); 2828 } 2829 2830 int 2831 zfs_prop_set_int(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t val) 2832 { 2833 char buf[64]; 2834 2835 (void) snprintf(buf, sizeof (buf), "%llu", (longlong_t)val); 2836 return (zfs_prop_set(zhp, zfs_prop_to_name(prop), buf)); 2837 } 2838 2839 /* 2840 * Similar to zfs_prop_get(), but returns the value as an integer. 2841 */ 2842 int 2843 zfs_prop_get_numeric(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t *value, 2844 zprop_source_t *src, char *statbuf, size_t statlen) 2845 { 2846 char *source; 2847 2848 /* 2849 * Check to see if this property applies to our object 2850 */ 2851 if (!zfs_prop_valid_for_type(prop, zhp->zfs_type)) { 2852 return (zfs_error_fmt(zhp->zfs_hdl, EZFS_PROPTYPE, 2853 dgettext(TEXT_DOMAIN, "cannot get property '%s'"), 2854 zfs_prop_to_name(prop))); 2855 } 2856 2857 if (src) 2858 *src = ZPROP_SRC_NONE; 2859 2860 if (get_numeric_property(zhp, prop, src, &source, value) != 0) 2861 return (-1); 2862 2863 get_source(zhp, src, source, statbuf, statlen); 2864 2865 return (0); 2866 } 2867 2868 static int 2869 idmap_id_to_numeric_domain_rid(uid_t id, boolean_t isuser, 2870 char **domainp, idmap_rid_t *ridp) 2871 { 2872 idmap_get_handle_t *get_hdl = NULL; 2873 idmap_stat status; 2874 int err = EINVAL; 2875 2876 if (idmap_get_create(&get_hdl) != IDMAP_SUCCESS) 2877 goto out; 2878 2879 if (isuser) { 2880 err = idmap_get_sidbyuid(get_hdl, id, 2881 IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status); 2882 } else { 2883 err = idmap_get_sidbygid(get_hdl, id, 2884 IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status); 2885 } 2886 if (err == IDMAP_SUCCESS && 2887 idmap_get_mappings(get_hdl) == IDMAP_SUCCESS && 2888 status == IDMAP_SUCCESS) 2889 err = 0; 2890 else 2891 err = EINVAL; 2892 out: 2893 if (get_hdl) 2894 idmap_get_destroy(get_hdl); 2895 return (err); 2896 } 2897 2898 /* 2899 * convert the propname into parameters needed by kernel 2900 * Eg: userquota@ahrens -> ZFS_PROP_USERQUOTA, "", 126829 2901 * Eg: userused@matt@domain -> ZFS_PROP_USERUSED, "S-1-123-456", 789 2902 */ 2903 static int 2904 userquota_propname_decode(const char *propname, boolean_t zoned, 2905 zfs_userquota_prop_t *typep, char *domain, int domainlen, uint64_t *ridp) 2906 { 2907 zfs_userquota_prop_t type; 2908 char *cp, *end; 2909 char *numericsid = NULL; 2910 boolean_t isuser; 2911 2912 domain[0] = '\0'; 2913 *ridp = 0; 2914 /* Figure out the property type ({user|group}{quota|space}) */ 2915 for (type = 0; type < ZFS_NUM_USERQUOTA_PROPS; type++) { 2916 if (strncmp(propname, zfs_userquota_prop_prefixes[type], 2917 strlen(zfs_userquota_prop_prefixes[type])) == 0) 2918 break; 2919 } 2920 if (type == ZFS_NUM_USERQUOTA_PROPS) 2921 return (EINVAL); 2922 *typep = type; 2923 2924 isuser = (type == ZFS_PROP_USERQUOTA || 2925 type == ZFS_PROP_USERUSED); 2926 2927 cp = strchr(propname, '@') + 1; 2928 2929 if (strchr(cp, '@')) { 2930 /* 2931 * It's a SID name (eg "user@domain") that needs to be 2932 * turned into S-1-domainID-RID. 2933 */ 2934 int flag = 0; 2935 idmap_stat stat, map_stat; 2936 uid_t pid; 2937 idmap_rid_t rid; 2938 idmap_get_handle_t *gh = NULL; 2939 2940 stat = idmap_get_create(&gh); 2941 if (stat != IDMAP_SUCCESS) { 2942 idmap_get_destroy(gh); 2943 return (ENOMEM); 2944 } 2945 if (zoned && getzoneid() == GLOBAL_ZONEID) 2946 return (ENOENT); 2947 if (isuser) { 2948 stat = idmap_getuidbywinname(cp, NULL, flag, &pid); 2949 if (stat < 0) 2950 return (ENOENT); 2951 stat = idmap_get_sidbyuid(gh, pid, flag, &numericsid, 2952 &rid, &map_stat); 2953 } else { 2954 stat = idmap_getgidbywinname(cp, NULL, flag, &pid); 2955 if (stat < 0) 2956 return (ENOENT); 2957 stat = idmap_get_sidbygid(gh, pid, flag, &numericsid, 2958 &rid, &map_stat); 2959 } 2960 if (stat < 0) { 2961 idmap_get_destroy(gh); 2962 return (ENOENT); 2963 } 2964 stat = idmap_get_mappings(gh); 2965 idmap_get_destroy(gh); 2966 2967 if (stat < 0) { 2968 return (ENOENT); 2969 } 2970 if (numericsid == NULL) 2971 return (ENOENT); 2972 cp = numericsid; 2973 *ridp = rid; 2974 /* will be further decoded below */ 2975 } 2976 2977 if (strncmp(cp, "S-1-", 4) == 0) { 2978 /* It's a numeric SID (eg "S-1-234-567-89") */ 2979 (void) strlcpy(domain, cp, domainlen); 2980 errno = 0; 2981 if (*ridp == 0) { 2982 cp = strrchr(domain, '-'); 2983 *cp = '\0'; 2984 cp++; 2985 *ridp = strtoull(cp, &end, 10); 2986 } else { 2987 end = ""; 2988 } 2989 if (numericsid) { 2990 free(numericsid); 2991 numericsid = NULL; 2992 } 2993 if (errno != 0 || *end != '\0') 2994 return (EINVAL); 2995 } else if (!isdigit(*cp)) { 2996 /* 2997 * It's a user/group name (eg "user") that needs to be 2998 * turned into a uid/gid 2999 */ 3000 if (zoned && getzoneid() == GLOBAL_ZONEID) 3001 return (ENOENT); 3002 if (isuser) { 3003 struct passwd *pw; 3004 pw = getpwnam(cp); 3005 if (pw == NULL) 3006 return (ENOENT); 3007 *ridp = pw->pw_uid; 3008 } else { 3009 struct group *gr; 3010 gr = getgrnam(cp); 3011 if (gr == NULL) 3012 return (ENOENT); 3013 *ridp = gr->gr_gid; 3014 } 3015 } else { 3016 /* It's a user/group ID (eg "12345"). */ 3017 uid_t id = strtoul(cp, &end, 10); 3018 idmap_rid_t rid; 3019 char *mapdomain; 3020 3021 if (*end != '\0') 3022 return (EINVAL); 3023 if (id > MAXUID) { 3024 /* It's an ephemeral ID. */ 3025 if (idmap_id_to_numeric_domain_rid(id, isuser, 3026 &mapdomain, &rid) != 0) 3027 return (ENOENT); 3028 (void) strlcpy(domain, mapdomain, domainlen); 3029 *ridp = rid; 3030 } else { 3031 *ridp = id; 3032 } 3033 } 3034 3035 ASSERT3P(numericsid, ==, NULL); 3036 return (0); 3037 } 3038 3039 static int 3040 zfs_prop_get_userquota_common(zfs_handle_t *zhp, const char *propname, 3041 uint64_t *propvalue, zfs_userquota_prop_t *typep) 3042 { 3043 int err; 3044 zfs_cmd_t zc = { 0 }; 3045 3046 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 3047 3048 err = userquota_propname_decode(propname, 3049 zfs_prop_get_int(zhp, ZFS_PROP_ZONED), 3050 typep, zc.zc_value, sizeof (zc.zc_value), &zc.zc_guid); 3051 zc.zc_objset_type = *typep; 3052 if (err) 3053 return (err); 3054 3055 err = ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_USERSPACE_ONE, &zc); 3056 if (err) 3057 return (err); 3058 3059 *propvalue = zc.zc_cookie; 3060 return (0); 3061 } 3062 3063 int 3064 zfs_prop_get_userquota_int(zfs_handle_t *zhp, const char *propname, 3065 uint64_t *propvalue) 3066 { 3067 zfs_userquota_prop_t type; 3068 3069 return (zfs_prop_get_userquota_common(zhp, propname, propvalue, 3070 &type)); 3071 } 3072 3073 int 3074 zfs_prop_get_userquota(zfs_handle_t *zhp, const char *propname, 3075 char *propbuf, int proplen, boolean_t literal) 3076 { 3077 int err; 3078 uint64_t propvalue; 3079 zfs_userquota_prop_t type; 3080 3081 err = zfs_prop_get_userquota_common(zhp, propname, &propvalue, 3082 &type); 3083 3084 if (err) 3085 return (err); 3086 3087 if (literal) { 3088 (void) snprintf(propbuf, proplen, "%llu", propvalue); 3089 } else if (propvalue == 0 && 3090 (type == ZFS_PROP_USERQUOTA || type == ZFS_PROP_GROUPQUOTA)) { 3091 (void) strlcpy(propbuf, "none", proplen); 3092 } else { 3093 zfs_nicenum(propvalue, propbuf, proplen); 3094 } 3095 return (0); 3096 } 3097 3098 int 3099 zfs_prop_get_written_int(zfs_handle_t *zhp, const char *propname, 3100 uint64_t *propvalue) 3101 { 3102 int err; 3103 zfs_cmd_t zc = { 0 }; 3104 const char *snapname; 3105 3106 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 3107 3108 snapname = strchr(propname, '@') + 1; 3109 if (strchr(snapname, '@')) { 3110 (void) strlcpy(zc.zc_value, snapname, sizeof (zc.zc_value)); 3111 } else { 3112 /* snapname is the short name, append it to zhp's fsname */ 3113 char *cp; 3114 3115 (void) strlcpy(zc.zc_value, zhp->zfs_name, 3116 sizeof (zc.zc_value)); 3117 cp = strchr(zc.zc_value, '@'); 3118 if (cp != NULL) 3119 *cp = '\0'; 3120 (void) strlcat(zc.zc_value, "@", sizeof (zc.zc_value)); 3121 (void) strlcat(zc.zc_value, snapname, sizeof (zc.zc_value)); 3122 } 3123 3124 err = ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_SPACE_WRITTEN, &zc); 3125 if (err) 3126 return (err); 3127 3128 *propvalue = zc.zc_cookie; 3129 return (0); 3130 } 3131 3132 int 3133 zfs_prop_get_written(zfs_handle_t *zhp, const char *propname, 3134 char *propbuf, int proplen, boolean_t literal) 3135 { 3136 int err; 3137 uint64_t propvalue; 3138 3139 err = zfs_prop_get_written_int(zhp, propname, &propvalue); 3140 3141 if (err) 3142 return (err); 3143 3144 if (literal) { 3145 (void) snprintf(propbuf, proplen, "%llu", propvalue); 3146 } else { 3147 zfs_nicenum(propvalue, propbuf, proplen); 3148 } 3149 return (0); 3150 } 3151 3152 /* 3153 * Returns the name of the given zfs handle. 3154 */ 3155 const char * 3156 zfs_get_name(const zfs_handle_t *zhp) 3157 { 3158 return (zhp->zfs_name); 3159 } 3160 3161 /* 3162 * Returns the name of the parent pool for the given zfs handle. 3163 */ 3164 const char * 3165 zfs_get_pool_name(const zfs_handle_t *zhp) 3166 { 3167 return (zhp->zpool_hdl->zpool_name); 3168 } 3169 3170 /* 3171 * Returns the type of the given zfs handle. 3172 */ 3173 zfs_type_t 3174 zfs_get_type(const zfs_handle_t *zhp) 3175 { 3176 return (zhp->zfs_type); 3177 } 3178 3179 /* 3180 * Is one dataset name a child dataset of another? 3181 * 3182 * Needs to handle these cases: 3183 * Dataset 1 "a/foo" "a/foo" "a/foo" "a/foo" 3184 * Dataset 2 "a/fo" "a/foobar" "a/bar/baz" "a/foo/bar" 3185 * Descendant? No. No. No. Yes. 3186 */ 3187 static boolean_t 3188 is_descendant(const char *ds1, const char *ds2) 3189 { 3190 size_t d1len = strlen(ds1); 3191 3192 /* ds2 can't be a descendant if it's smaller */ 3193 if (strlen(ds2) < d1len) 3194 return (B_FALSE); 3195 3196 /* otherwise, compare strings and verify that there's a '/' char */ 3197 return (ds2[d1len] == '/' && (strncmp(ds1, ds2, d1len) == 0)); 3198 } 3199 3200 /* 3201 * Given a complete name, return just the portion that refers to the parent. 3202 * Will return -1 if there is no parent (path is just the name of the 3203 * pool). 3204 */ 3205 static int 3206 parent_name(const char *path, char *buf, size_t buflen) 3207 { 3208 char *slashp; 3209 3210 (void) strlcpy(buf, path, buflen); 3211 3212 if ((slashp = strrchr(buf, '/')) == NULL) 3213 return (-1); 3214 *slashp = '\0'; 3215 3216 return (0); 3217 } 3218 3219 /* 3220 * If accept_ancestor is false, then check to make sure that the given path has 3221 * a parent, and that it exists. If accept_ancestor is true, then find the 3222 * closest existing ancestor for the given path. In prefixlen return the 3223 * length of already existing prefix of the given path. We also fetch the 3224 * 'zoned' property, which is used to validate property settings when creating 3225 * new datasets. 3226 */ 3227 static int 3228 check_parents(libzfs_handle_t *hdl, const char *path, uint64_t *zoned, 3229 boolean_t accept_ancestor, int *prefixlen) 3230 { 3231 zfs_cmd_t zc = { 0 }; 3232 char parent[ZFS_MAX_DATASET_NAME_LEN]; 3233 char *slash; 3234 zfs_handle_t *zhp; 3235 char errbuf[1024]; 3236 uint64_t is_zoned; 3237 3238 (void) snprintf(errbuf, sizeof (errbuf), 3239 dgettext(TEXT_DOMAIN, "cannot create '%s'"), path); 3240 3241 /* get parent, and check to see if this is just a pool */ 3242 if (parent_name(path, parent, sizeof (parent)) != 0) { 3243 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3244 "missing dataset name")); 3245 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3246 } 3247 3248 /* check to see if the pool exists */ 3249 if ((slash = strchr(parent, '/')) == NULL) 3250 slash = parent + strlen(parent); 3251 (void) strncpy(zc.zc_name, parent, slash - parent); 3252 zc.zc_name[slash - parent] = '\0'; 3253 if (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_STATS, &zc) != 0 && 3254 errno == ENOENT) { 3255 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3256 "no such pool '%s'"), zc.zc_name); 3257 return (zfs_error(hdl, EZFS_NOENT, errbuf)); 3258 } 3259 3260 /* check to see if the parent dataset exists */ 3261 while ((zhp = make_dataset_handle(hdl, parent)) == NULL) { 3262 if (errno == ENOENT && accept_ancestor) { 3263 /* 3264 * Go deeper to find an ancestor, give up on top level. 3265 */ 3266 if (parent_name(parent, parent, sizeof (parent)) != 0) { 3267 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3268 "no such pool '%s'"), zc.zc_name); 3269 return (zfs_error(hdl, EZFS_NOENT, errbuf)); 3270 } 3271 } else if (errno == ENOENT) { 3272 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3273 "parent does not exist")); 3274 return (zfs_error(hdl, EZFS_NOENT, errbuf)); 3275 } else 3276 return (zfs_standard_error(hdl, errno, errbuf)); 3277 } 3278 3279 is_zoned = zfs_prop_get_int(zhp, ZFS_PROP_ZONED); 3280 if (zoned != NULL) 3281 *zoned = is_zoned; 3282 3283 /* we are in a non-global zone, but parent is in the global zone */ 3284 if (getzoneid() != GLOBAL_ZONEID && !is_zoned) { 3285 (void) zfs_standard_error(hdl, EPERM, errbuf); 3286 zfs_close(zhp); 3287 return (-1); 3288 } 3289 3290 /* make sure parent is a filesystem */ 3291 if (zfs_get_type(zhp) != ZFS_TYPE_FILESYSTEM) { 3292 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3293 "parent is not a filesystem")); 3294 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf); 3295 zfs_close(zhp); 3296 return (-1); 3297 } 3298 3299 zfs_close(zhp); 3300 if (prefixlen != NULL) 3301 *prefixlen = strlen(parent); 3302 return (0); 3303 } 3304 3305 /* 3306 * Finds whether the dataset of the given type(s) exists. 3307 */ 3308 boolean_t 3309 zfs_dataset_exists(libzfs_handle_t *hdl, const char *path, zfs_type_t types) 3310 { 3311 zfs_handle_t *zhp; 3312 3313 if (!zfs_validate_name(hdl, path, types, B_FALSE)) 3314 return (B_FALSE); 3315 3316 /* 3317 * Try to get stats for the dataset, which will tell us if it exists. 3318 */ 3319 if ((zhp = make_dataset_handle(hdl, path)) != NULL) { 3320 int ds_type = zhp->zfs_type; 3321 3322 zfs_close(zhp); 3323 if (types & ds_type) 3324 return (B_TRUE); 3325 } 3326 return (B_FALSE); 3327 } 3328 3329 /* 3330 * Given a path to 'target', create all the ancestors between 3331 * the prefixlen portion of the path, and the target itself. 3332 * Fail if the initial prefixlen-ancestor does not already exist. 3333 */ 3334 int 3335 create_parents(libzfs_handle_t *hdl, char *target, int prefixlen) 3336 { 3337 zfs_handle_t *h; 3338 char *cp; 3339 const char *opname; 3340 3341 /* make sure prefix exists */ 3342 cp = target + prefixlen; 3343 if (*cp != '/') { 3344 assert(strchr(cp, '/') == NULL); 3345 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM); 3346 } else { 3347 *cp = '\0'; 3348 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM); 3349 *cp = '/'; 3350 } 3351 if (h == NULL) 3352 return (-1); 3353 zfs_close(h); 3354 3355 /* 3356 * Attempt to create, mount, and share any ancestor filesystems, 3357 * up to the prefixlen-long one. 3358 */ 3359 for (cp = target + prefixlen + 1; 3360 (cp = strchr(cp, '/')) != NULL; *cp = '/', cp++) { 3361 3362 *cp = '\0'; 3363 3364 h = make_dataset_handle(hdl, target); 3365 if (h) { 3366 /* it already exists, nothing to do here */ 3367 zfs_close(h); 3368 continue; 3369 } 3370 3371 if (zfs_create(hdl, target, ZFS_TYPE_FILESYSTEM, 3372 NULL) != 0) { 3373 opname = dgettext(TEXT_DOMAIN, "create"); 3374 goto ancestorerr; 3375 } 3376 3377 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM); 3378 if (h == NULL) { 3379 opname = dgettext(TEXT_DOMAIN, "open"); 3380 goto ancestorerr; 3381 } 3382 3383 if (zfs_mount(h, NULL, 0) != 0) { 3384 opname = dgettext(TEXT_DOMAIN, "mount"); 3385 goto ancestorerr; 3386 } 3387 3388 if (zfs_share(h) != 0) { 3389 opname = dgettext(TEXT_DOMAIN, "share"); 3390 goto ancestorerr; 3391 } 3392 3393 zfs_close(h); 3394 } 3395 3396 return (0); 3397 3398 ancestorerr: 3399 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3400 "failed to %s ancestor '%s'"), opname, target); 3401 return (-1); 3402 } 3403 3404 /* 3405 * Creates non-existing ancestors of the given path. 3406 */ 3407 int 3408 zfs_create_ancestors(libzfs_handle_t *hdl, const char *path) 3409 { 3410 int prefix; 3411 char *path_copy; 3412 char errbuf[1024]; 3413 int rc = 0; 3414 3415 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3416 "cannot create '%s'"), path); 3417 3418 /* 3419 * Check that we are not passing the nesting limit 3420 * before we start creating any ancestors. 3421 */ 3422 if (dataset_nestcheck(path) != 0) { 3423 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3424 "maximum name nesting depth exceeded")); 3425 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3426 } 3427 3428 if (check_parents(hdl, path, NULL, B_TRUE, &prefix) != 0) 3429 return (-1); 3430 3431 if ((path_copy = strdup(path)) != NULL) { 3432 rc = create_parents(hdl, path_copy, prefix); 3433 free(path_copy); 3434 } 3435 if (path_copy == NULL || rc != 0) 3436 return (-1); 3437 3438 return (0); 3439 } 3440 3441 /* 3442 * Create a new filesystem or volume. 3443 */ 3444 int 3445 zfs_create(libzfs_handle_t *hdl, const char *path, zfs_type_t type, 3446 nvlist_t *props) 3447 { 3448 int ret; 3449 uint64_t size = 0; 3450 uint64_t blocksize = zfs_prop_default_numeric(ZFS_PROP_VOLBLOCKSIZE); 3451 char errbuf[1024]; 3452 uint64_t zoned; 3453 enum lzc_dataset_type ost; 3454 zpool_handle_t *zpool_handle; 3455 3456 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3457 "cannot create '%s'"), path); 3458 3459 /* validate the path, taking care to note the extended error message */ 3460 if (!zfs_validate_name(hdl, path, type, B_TRUE)) 3461 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3462 3463 if (dataset_nestcheck(path) != 0) { 3464 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3465 "maximum name nesting depth exceeded")); 3466 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3467 } 3468 3469 /* validate parents exist */ 3470 if (check_parents(hdl, path, &zoned, B_FALSE, NULL) != 0) 3471 return (-1); 3472 3473 /* 3474 * The failure modes when creating a dataset of a different type over 3475 * one that already exists is a little strange. In particular, if you 3476 * try to create a dataset on top of an existing dataset, the ioctl() 3477 * will return ENOENT, not EEXIST. To prevent this from happening, we 3478 * first try to see if the dataset exists. 3479 */ 3480 if (zfs_dataset_exists(hdl, path, ZFS_TYPE_DATASET)) { 3481 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3482 "dataset already exists")); 3483 return (zfs_error(hdl, EZFS_EXISTS, errbuf)); 3484 } 3485 3486 if (type == ZFS_TYPE_VOLUME) 3487 ost = LZC_DATSET_TYPE_ZVOL; 3488 else 3489 ost = LZC_DATSET_TYPE_ZFS; 3490 3491 /* open zpool handle for prop validation */ 3492 char pool_path[ZFS_MAX_DATASET_NAME_LEN]; 3493 (void) strlcpy(pool_path, path, sizeof (pool_path)); 3494 3495 /* truncate pool_path at first slash */ 3496 char *p = strchr(pool_path, '/'); 3497 if (p != NULL) 3498 *p = '\0'; 3499 3500 if ((zpool_handle = zpool_open(hdl, pool_path)) == NULL) 3501 return (-1); 3502 3503 if (props && (props = zfs_valid_proplist(hdl, type, props, 3504 zoned, NULL, zpool_handle, errbuf)) == 0) { 3505 zpool_close(zpool_handle); 3506 return (-1); 3507 } 3508 zpool_close(zpool_handle); 3509 3510 if (type == ZFS_TYPE_VOLUME) { 3511 /* 3512 * If we are creating a volume, the size and block size must 3513 * satisfy a few restraints. First, the blocksize must be a 3514 * valid block size between SPA_{MIN,MAX}BLOCKSIZE. Second, the 3515 * volsize must be a multiple of the block size, and cannot be 3516 * zero. 3517 */ 3518 if (props == NULL || nvlist_lookup_uint64(props, 3519 zfs_prop_to_name(ZFS_PROP_VOLSIZE), &size) != 0) { 3520 nvlist_free(props); 3521 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3522 "missing volume size")); 3523 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 3524 } 3525 3526 if ((ret = nvlist_lookup_uint64(props, 3527 zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE), 3528 &blocksize)) != 0) { 3529 if (ret == ENOENT) { 3530 blocksize = zfs_prop_default_numeric( 3531 ZFS_PROP_VOLBLOCKSIZE); 3532 } else { 3533 nvlist_free(props); 3534 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3535 "missing volume block size")); 3536 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 3537 } 3538 } 3539 3540 if (size == 0) { 3541 nvlist_free(props); 3542 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3543 "volume size cannot be zero")); 3544 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 3545 } 3546 3547 if (size % blocksize != 0) { 3548 nvlist_free(props); 3549 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3550 "volume size must be a multiple of volume block " 3551 "size")); 3552 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 3553 } 3554 } 3555 3556 /* create the dataset */ 3557 ret = lzc_create(path, ost, props); 3558 nvlist_free(props); 3559 3560 /* check for failure */ 3561 if (ret != 0) { 3562 char parent[ZFS_MAX_DATASET_NAME_LEN]; 3563 (void) parent_name(path, parent, sizeof (parent)); 3564 3565 switch (errno) { 3566 case ENOENT: 3567 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3568 "no such parent '%s'"), parent); 3569 return (zfs_error(hdl, EZFS_NOENT, errbuf)); 3570 3571 case EINVAL: 3572 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3573 "parent '%s' is not a filesystem"), parent); 3574 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 3575 3576 case ENOTSUP: 3577 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3578 "pool must be upgraded to set this " 3579 "property or value")); 3580 return (zfs_error(hdl, EZFS_BADVERSION, errbuf)); 3581 case ERANGE: 3582 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3583 "invalid property value(s) specified")); 3584 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 3585 #ifdef _ILP32 3586 case EOVERFLOW: 3587 /* 3588 * This platform can't address a volume this big. 3589 */ 3590 if (type == ZFS_TYPE_VOLUME) 3591 return (zfs_error(hdl, EZFS_VOLTOOBIG, 3592 errbuf)); 3593 #endif 3594 /* FALLTHROUGH */ 3595 default: 3596 return (zfs_standard_error(hdl, errno, errbuf)); 3597 } 3598 } 3599 3600 return (0); 3601 } 3602 3603 /* 3604 * Destroys the given dataset. The caller must make sure that the filesystem 3605 * isn't mounted, and that there are no active dependents. If the file system 3606 * does not exist this function does nothing. 3607 */ 3608 int 3609 zfs_destroy(zfs_handle_t *zhp, boolean_t defer) 3610 { 3611 zfs_cmd_t zc = { 0 }; 3612 3613 if (zhp->zfs_type == ZFS_TYPE_BOOKMARK) { 3614 nvlist_t *nv = fnvlist_alloc(); 3615 fnvlist_add_boolean(nv, zhp->zfs_name); 3616 int error = lzc_destroy_bookmarks(nv, NULL); 3617 fnvlist_free(nv); 3618 if (error != 0) { 3619 return (zfs_standard_error_fmt(zhp->zfs_hdl, errno, 3620 dgettext(TEXT_DOMAIN, "cannot destroy '%s'"), 3621 zhp->zfs_name)); 3622 } 3623 return (0); 3624 } 3625 3626 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 3627 3628 if (ZFS_IS_VOLUME(zhp)) { 3629 zc.zc_objset_type = DMU_OST_ZVOL; 3630 } else { 3631 zc.zc_objset_type = DMU_OST_ZFS; 3632 } 3633 3634 zc.zc_defer_destroy = defer; 3635 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_DESTROY, &zc) != 0 && 3636 errno != ENOENT) { 3637 return (zfs_standard_error_fmt(zhp->zfs_hdl, errno, 3638 dgettext(TEXT_DOMAIN, "cannot destroy '%s'"), 3639 zhp->zfs_name)); 3640 } 3641 3642 remove_mountpoint(zhp); 3643 3644 return (0); 3645 } 3646 3647 struct destroydata { 3648 nvlist_t *nvl; 3649 const char *snapname; 3650 }; 3651 3652 static int 3653 zfs_check_snap_cb(zfs_handle_t *zhp, void *arg) 3654 { 3655 struct destroydata *dd = arg; 3656 char name[ZFS_MAX_DATASET_NAME_LEN]; 3657 int rv = 0; 3658 3659 (void) snprintf(name, sizeof (name), 3660 "%s@%s", zhp->zfs_name, dd->snapname); 3661 3662 if (lzc_exists(name)) 3663 verify(nvlist_add_boolean(dd->nvl, name) == 0); 3664 3665 rv = zfs_iter_filesystems(zhp, zfs_check_snap_cb, dd); 3666 zfs_close(zhp); 3667 return (rv); 3668 } 3669 3670 /* 3671 * Destroys all snapshots with the given name in zhp & descendants. 3672 */ 3673 int 3674 zfs_destroy_snaps(zfs_handle_t *zhp, char *snapname, boolean_t defer) 3675 { 3676 int ret; 3677 struct destroydata dd = { 0 }; 3678 3679 dd.snapname = snapname; 3680 verify(nvlist_alloc(&dd.nvl, NV_UNIQUE_NAME, 0) == 0); 3681 (void) zfs_check_snap_cb(zfs_handle_dup(zhp), &dd); 3682 3683 if (nvlist_empty(dd.nvl)) { 3684 ret = zfs_standard_error_fmt(zhp->zfs_hdl, ENOENT, 3685 dgettext(TEXT_DOMAIN, "cannot destroy '%s@%s'"), 3686 zhp->zfs_name, snapname); 3687 } else { 3688 ret = zfs_destroy_snaps_nvl(zhp->zfs_hdl, dd.nvl, defer); 3689 } 3690 nvlist_free(dd.nvl); 3691 return (ret); 3692 } 3693 3694 /* 3695 * Destroys all the snapshots named in the nvlist. 3696 */ 3697 int 3698 zfs_destroy_snaps_nvl(libzfs_handle_t *hdl, nvlist_t *snaps, boolean_t defer) 3699 { 3700 int ret; 3701 nvlist_t *errlist = NULL; 3702 3703 ret = lzc_destroy_snaps(snaps, defer, &errlist); 3704 3705 if (ret == 0) { 3706 nvlist_free(errlist); 3707 return (0); 3708 } 3709 3710 if (nvlist_empty(errlist)) { 3711 char errbuf[1024]; 3712 (void) snprintf(errbuf, sizeof (errbuf), 3713 dgettext(TEXT_DOMAIN, "cannot destroy snapshots")); 3714 3715 ret = zfs_standard_error(hdl, ret, errbuf); 3716 } 3717 for (nvpair_t *pair = nvlist_next_nvpair(errlist, NULL); 3718 pair != NULL; pair = nvlist_next_nvpair(errlist, pair)) { 3719 char errbuf[1024]; 3720 (void) snprintf(errbuf, sizeof (errbuf), 3721 dgettext(TEXT_DOMAIN, "cannot destroy snapshot %s"), 3722 nvpair_name(pair)); 3723 3724 switch (fnvpair_value_int32(pair)) { 3725 case EEXIST: 3726 zfs_error_aux(hdl, 3727 dgettext(TEXT_DOMAIN, "snapshot is cloned")); 3728 ret = zfs_error(hdl, EZFS_EXISTS, errbuf); 3729 break; 3730 default: 3731 ret = zfs_standard_error(hdl, errno, errbuf); 3732 break; 3733 } 3734 } 3735 3736 nvlist_free(errlist); 3737 return (ret); 3738 } 3739 3740 /* 3741 * Clones the given dataset. The target must be of the same type as the source. 3742 */ 3743 int 3744 zfs_clone(zfs_handle_t *zhp, const char *target, nvlist_t *props) 3745 { 3746 char parent[ZFS_MAX_DATASET_NAME_LEN]; 3747 int ret; 3748 char errbuf[1024]; 3749 libzfs_handle_t *hdl = zhp->zfs_hdl; 3750 uint64_t zoned; 3751 3752 assert(zhp->zfs_type == ZFS_TYPE_SNAPSHOT); 3753 3754 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3755 "cannot create '%s'"), target); 3756 3757 /* validate the target/clone name */ 3758 if (!zfs_validate_name(hdl, target, ZFS_TYPE_FILESYSTEM, B_TRUE)) 3759 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3760 3761 /* validate parents exist */ 3762 if (check_parents(hdl, target, &zoned, B_FALSE, NULL) != 0) 3763 return (-1); 3764 3765 (void) parent_name(target, parent, sizeof (parent)); 3766 3767 /* do the clone */ 3768 3769 if (props) { 3770 zfs_type_t type; 3771 3772 if (ZFS_IS_VOLUME(zhp)) { 3773 type = ZFS_TYPE_VOLUME; 3774 } else { 3775 type = ZFS_TYPE_FILESYSTEM; 3776 } 3777 if ((props = zfs_valid_proplist(hdl, type, props, zoned, 3778 zhp, zhp->zpool_hdl, errbuf)) == NULL) 3779 return (-1); 3780 if (zfs_fix_auto_resv(zhp, props) == -1) { 3781 nvlist_free(props); 3782 return (-1); 3783 } 3784 } 3785 3786 ret = lzc_clone(target, zhp->zfs_name, props); 3787 nvlist_free(props); 3788 3789 if (ret != 0) { 3790 switch (errno) { 3791 3792 case ENOENT: 3793 /* 3794 * The parent doesn't exist. We should have caught this 3795 * above, but there may a race condition that has since 3796 * destroyed the parent. 3797 * 3798 * At this point, we don't know whether it's the source 3799 * that doesn't exist anymore, or whether the target 3800 * dataset doesn't exist. 3801 */ 3802 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN, 3803 "no such parent '%s'"), parent); 3804 return (zfs_error(zhp->zfs_hdl, EZFS_NOENT, errbuf)); 3805 3806 case EXDEV: 3807 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN, 3808 "source and target pools differ")); 3809 return (zfs_error(zhp->zfs_hdl, EZFS_CROSSTARGET, 3810 errbuf)); 3811 3812 default: 3813 return (zfs_standard_error(zhp->zfs_hdl, errno, 3814 errbuf)); 3815 } 3816 } 3817 3818 return (ret); 3819 } 3820 3821 /* 3822 * Promotes the given clone fs to be the clone parent. 3823 */ 3824 int 3825 zfs_promote(zfs_handle_t *zhp) 3826 { 3827 libzfs_handle_t *hdl = zhp->zfs_hdl; 3828 char snapname[ZFS_MAX_DATASET_NAME_LEN]; 3829 int ret; 3830 char errbuf[1024]; 3831 3832 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3833 "cannot promote '%s'"), zhp->zfs_name); 3834 3835 if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) { 3836 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3837 "snapshots can not be promoted")); 3838 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 3839 } 3840 3841 if (zhp->zfs_dmustats.dds_origin[0] == '\0') { 3842 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3843 "not a cloned filesystem")); 3844 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 3845 } 3846 3847 if (!zfs_validate_name(hdl, zhp->zfs_name, zhp->zfs_type, B_TRUE)) 3848 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3849 3850 ret = lzc_promote(zhp->zfs_name, snapname, sizeof (snapname)); 3851 3852 if (ret != 0) { 3853 switch (ret) { 3854 case EEXIST: 3855 /* There is a conflicting snapshot name. */ 3856 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3857 "conflicting snapshot '%s' from parent '%s'"), 3858 snapname, zhp->zfs_dmustats.dds_origin); 3859 return (zfs_error(hdl, EZFS_EXISTS, errbuf)); 3860 3861 default: 3862 return (zfs_standard_error(hdl, ret, errbuf)); 3863 } 3864 } 3865 return (ret); 3866 } 3867 3868 typedef struct snapdata { 3869 nvlist_t *sd_nvl; 3870 const char *sd_snapname; 3871 } snapdata_t; 3872 3873 static int 3874 zfs_snapshot_cb(zfs_handle_t *zhp, void *arg) 3875 { 3876 snapdata_t *sd = arg; 3877 char name[ZFS_MAX_DATASET_NAME_LEN]; 3878 int rv = 0; 3879 3880 if (zfs_prop_get_int(zhp, ZFS_PROP_INCONSISTENT) == 0) { 3881 (void) snprintf(name, sizeof (name), 3882 "%s@%s", zfs_get_name(zhp), sd->sd_snapname); 3883 3884 fnvlist_add_boolean(sd->sd_nvl, name); 3885 3886 rv = zfs_iter_filesystems(zhp, zfs_snapshot_cb, sd); 3887 } 3888 zfs_close(zhp); 3889 3890 return (rv); 3891 } 3892 3893 int 3894 zfs_remap_indirects(libzfs_handle_t *hdl, const char *fs) 3895 { 3896 int err; 3897 char errbuf[1024]; 3898 3899 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3900 "cannot remap dataset '%s'"), fs); 3901 3902 err = lzc_remap(fs); 3903 3904 if (err != 0) { 3905 switch (err) { 3906 case ENOTSUP: 3907 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3908 "pool must be upgraded")); 3909 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf); 3910 break; 3911 case EINVAL: 3912 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf); 3913 break; 3914 default: 3915 (void) zfs_standard_error(hdl, err, errbuf); 3916 break; 3917 } 3918 } 3919 3920 return (err); 3921 } 3922 3923 /* 3924 * Creates snapshots. The keys in the snaps nvlist are the snapshots to be 3925 * created. 3926 */ 3927 int 3928 zfs_snapshot_nvl(libzfs_handle_t *hdl, nvlist_t *snaps, nvlist_t *props) 3929 { 3930 int ret; 3931 char errbuf[1024]; 3932 nvpair_t *elem; 3933 nvlist_t *errors; 3934 3935 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3936 "cannot create snapshots ")); 3937 3938 elem = NULL; 3939 while ((elem = nvlist_next_nvpair(snaps, elem)) != NULL) { 3940 const char *snapname = nvpair_name(elem); 3941 3942 /* validate the target name */ 3943 if (!zfs_validate_name(hdl, snapname, ZFS_TYPE_SNAPSHOT, 3944 B_TRUE)) { 3945 (void) snprintf(errbuf, sizeof (errbuf), 3946 dgettext(TEXT_DOMAIN, 3947 "cannot create snapshot '%s'"), snapname); 3948 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3949 } 3950 } 3951 3952 /* 3953 * get pool handle for prop validation. assumes all snaps are in the 3954 * same pool, as does lzc_snapshot (below). 3955 */ 3956 char pool[ZFS_MAX_DATASET_NAME_LEN]; 3957 elem = nvlist_next_nvpair(snaps, NULL); 3958 (void) strlcpy(pool, nvpair_name(elem), sizeof (pool)); 3959 pool[strcspn(pool, "/@")] = '\0'; 3960 zpool_handle_t *zpool_hdl = zpool_open(hdl, pool); 3961 3962 if (props != NULL && 3963 (props = zfs_valid_proplist(hdl, ZFS_TYPE_SNAPSHOT, 3964 props, B_FALSE, NULL, zpool_hdl, errbuf)) == NULL) { 3965 zpool_close(zpool_hdl); 3966 return (-1); 3967 } 3968 zpool_close(zpool_hdl); 3969 3970 ret = lzc_snapshot(snaps, props, &errors); 3971 3972 if (ret != 0) { 3973 boolean_t printed = B_FALSE; 3974 for (elem = nvlist_next_nvpair(errors, NULL); 3975 elem != NULL; 3976 elem = nvlist_next_nvpair(errors, elem)) { 3977 (void) snprintf(errbuf, sizeof (errbuf), 3978 dgettext(TEXT_DOMAIN, 3979 "cannot create snapshot '%s'"), nvpair_name(elem)); 3980 (void) zfs_standard_error(hdl, 3981 fnvpair_value_int32(elem), errbuf); 3982 printed = B_TRUE; 3983 } 3984 if (!printed) { 3985 switch (ret) { 3986 case EXDEV: 3987 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3988 "multiple snapshots of same " 3989 "fs not allowed")); 3990 (void) zfs_error(hdl, EZFS_EXISTS, errbuf); 3991 3992 break; 3993 default: 3994 (void) zfs_standard_error(hdl, ret, errbuf); 3995 } 3996 } 3997 } 3998 3999 nvlist_free(props); 4000 nvlist_free(errors); 4001 return (ret); 4002 } 4003 4004 int 4005 zfs_snapshot(libzfs_handle_t *hdl, const char *path, boolean_t recursive, 4006 nvlist_t *props) 4007 { 4008 int ret; 4009 snapdata_t sd = { 0 }; 4010 char fsname[ZFS_MAX_DATASET_NAME_LEN]; 4011 char *cp; 4012 zfs_handle_t *zhp; 4013 char errbuf[1024]; 4014 4015 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 4016 "cannot snapshot %s"), path); 4017 4018 if (!zfs_validate_name(hdl, path, ZFS_TYPE_SNAPSHOT, B_TRUE)) 4019 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 4020 4021 (void) strlcpy(fsname, path, sizeof (fsname)); 4022 cp = strchr(fsname, '@'); 4023 *cp = '\0'; 4024 sd.sd_snapname = cp + 1; 4025 4026 if ((zhp = zfs_open(hdl, fsname, ZFS_TYPE_FILESYSTEM | 4027 ZFS_TYPE_VOLUME)) == NULL) { 4028 return (-1); 4029 } 4030 4031 verify(nvlist_alloc(&sd.sd_nvl, NV_UNIQUE_NAME, 0) == 0); 4032 if (recursive) { 4033 (void) zfs_snapshot_cb(zfs_handle_dup(zhp), &sd); 4034 } else { 4035 fnvlist_add_boolean(sd.sd_nvl, path); 4036 } 4037 4038 ret = zfs_snapshot_nvl(hdl, sd.sd_nvl, props); 4039 nvlist_free(sd.sd_nvl); 4040 zfs_close(zhp); 4041 return (ret); 4042 } 4043 4044 /* 4045 * Destroy any more recent snapshots. We invoke this callback on any dependents 4046 * of the snapshot first. If the 'cb_dependent' member is non-zero, then this 4047 * is a dependent and we should just destroy it without checking the transaction 4048 * group. 4049 */ 4050 typedef struct rollback_data { 4051 const char *cb_target; /* the snapshot */ 4052 uint64_t cb_create; /* creation time reference */ 4053 boolean_t cb_error; 4054 boolean_t cb_force; 4055 } rollback_data_t; 4056 4057 static int 4058 rollback_destroy_dependent(zfs_handle_t *zhp, void *data) 4059 { 4060 rollback_data_t *cbp = data; 4061 prop_changelist_t *clp; 4062 4063 /* We must destroy this clone; first unmount it */ 4064 clp = changelist_gather(zhp, ZFS_PROP_NAME, 0, 4065 cbp->cb_force ? MS_FORCE: 0); 4066 if (clp == NULL || changelist_prefix(clp) != 0) { 4067 cbp->cb_error = B_TRUE; 4068 zfs_close(zhp); 4069 return (0); 4070 } 4071 if (zfs_destroy(zhp, B_FALSE) != 0) 4072 cbp->cb_error = B_TRUE; 4073 else 4074 changelist_remove(clp, zhp->zfs_name); 4075 (void) changelist_postfix(clp); 4076 changelist_free(clp); 4077 4078 zfs_close(zhp); 4079 return (0); 4080 } 4081 4082 static int 4083 rollback_destroy(zfs_handle_t *zhp, void *data) 4084 { 4085 rollback_data_t *cbp = data; 4086 4087 if (zfs_prop_get_int(zhp, ZFS_PROP_CREATETXG) > cbp->cb_create) { 4088 cbp->cb_error |= zfs_iter_dependents(zhp, B_FALSE, 4089 rollback_destroy_dependent, cbp); 4090 4091 cbp->cb_error |= zfs_destroy(zhp, B_FALSE); 4092 } 4093 4094 zfs_close(zhp); 4095 return (0); 4096 } 4097 4098 /* 4099 * Given a dataset, rollback to a specific snapshot, discarding any 4100 * data changes since then and making it the active dataset. 4101 * 4102 * Any snapshots and bookmarks more recent than the target are 4103 * destroyed, along with their dependents (i.e. clones). 4104 */ 4105 int 4106 zfs_rollback(zfs_handle_t *zhp, zfs_handle_t *snap, boolean_t force) 4107 { 4108 rollback_data_t cb = { 0 }; 4109 int err; 4110 boolean_t restore_resv = 0; 4111 uint64_t old_volsize = 0, new_volsize; 4112 zfs_prop_t resv_prop; 4113 4114 assert(zhp->zfs_type == ZFS_TYPE_FILESYSTEM || 4115 zhp->zfs_type == ZFS_TYPE_VOLUME); 4116 4117 /* 4118 * Destroy all recent snapshots and their dependents. 4119 */ 4120 cb.cb_force = force; 4121 cb.cb_target = snap->zfs_name; 4122 cb.cb_create = zfs_prop_get_int(snap, ZFS_PROP_CREATETXG); 4123 (void) zfs_iter_snapshots(zhp, B_FALSE, rollback_destroy, &cb); 4124 (void) zfs_iter_bookmarks(zhp, rollback_destroy, &cb); 4125 4126 if (cb.cb_error) 4127 return (-1); 4128 4129 /* 4130 * Now that we have verified that the snapshot is the latest, 4131 * rollback to the given snapshot. 4132 */ 4133 4134 if (zhp->zfs_type == ZFS_TYPE_VOLUME) { 4135 if (zfs_which_resv_prop(zhp, &resv_prop) < 0) 4136 return (-1); 4137 old_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE); 4138 restore_resv = 4139 (old_volsize == zfs_prop_get_int(zhp, resv_prop)); 4140 } 4141 4142 /* 4143 * Pass both the filesystem and the wanted snapshot names, 4144 * we would get an error back if the snapshot is destroyed or 4145 * a new snapshot is created before this request is processed. 4146 */ 4147 err = lzc_rollback_to(zhp->zfs_name, snap->zfs_name); 4148 if (err != 0) { 4149 char errbuf[1024]; 4150 4151 (void) snprintf(errbuf, sizeof (errbuf), 4152 dgettext(TEXT_DOMAIN, "cannot rollback '%s'"), 4153 zhp->zfs_name); 4154 switch (err) { 4155 case EEXIST: 4156 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN, 4157 "there is a snapshot or bookmark more recent " 4158 "than '%s'"), snap->zfs_name); 4159 (void) zfs_error(zhp->zfs_hdl, EZFS_EXISTS, errbuf); 4160 break; 4161 case ESRCH: 4162 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN, 4163 "'%s' is not found among snapshots of '%s'"), 4164 snap->zfs_name, zhp->zfs_name); 4165 (void) zfs_error(zhp->zfs_hdl, EZFS_NOENT, errbuf); 4166 break; 4167 case EINVAL: 4168 (void) zfs_error(zhp->zfs_hdl, EZFS_BADTYPE, errbuf); 4169 break; 4170 default: 4171 (void) zfs_standard_error(zhp->zfs_hdl, err, errbuf); 4172 } 4173 return (err); 4174 } 4175 4176 /* 4177 * For volumes, if the pre-rollback volsize matched the pre- 4178 * rollback reservation and the volsize has changed then set 4179 * the reservation property to the post-rollback volsize. 4180 * Make a new handle since the rollback closed the dataset. 4181 */ 4182 if ((zhp->zfs_type == ZFS_TYPE_VOLUME) && 4183 (zhp = make_dataset_handle(zhp->zfs_hdl, zhp->zfs_name))) { 4184 if (restore_resv) { 4185 new_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE); 4186 if (old_volsize != new_volsize) 4187 err = zfs_prop_set_int(zhp, resv_prop, 4188 new_volsize); 4189 } 4190 zfs_close(zhp); 4191 } 4192 return (err); 4193 } 4194 4195 /* 4196 * Renames the given dataset. 4197 */ 4198 int 4199 zfs_rename(zfs_handle_t *zhp, const char *target, boolean_t recursive, 4200 boolean_t force_unmount) 4201 { 4202 int ret = 0; 4203 zfs_cmd_t zc = { 0 }; 4204 char *delim; 4205 prop_changelist_t *cl = NULL; 4206 zfs_handle_t *zhrp = NULL; 4207 char *parentname = NULL; 4208 char parent[ZFS_MAX_DATASET_NAME_LEN]; 4209 libzfs_handle_t *hdl = zhp->zfs_hdl; 4210 char errbuf[1024]; 4211 4212 /* if we have the same exact name, just return success */ 4213 if (strcmp(zhp->zfs_name, target) == 0) 4214 return (0); 4215 4216 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 4217 "cannot rename to '%s'"), target); 4218 4219 /* make sure source name is valid */ 4220 if (!zfs_validate_name(hdl, zhp->zfs_name, zhp->zfs_type, B_TRUE)) 4221 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 4222 4223 /* 4224 * Make sure the target name is valid 4225 */ 4226 if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) { 4227 if ((strchr(target, '@') == NULL) || 4228 *target == '@') { 4229 /* 4230 * Snapshot target name is abbreviated, 4231 * reconstruct full dataset name 4232 */ 4233 (void) strlcpy(parent, zhp->zfs_name, 4234 sizeof (parent)); 4235 delim = strchr(parent, '@'); 4236 if (strchr(target, '@') == NULL) 4237 *(++delim) = '\0'; 4238 else 4239 *delim = '\0'; 4240 (void) strlcat(parent, target, sizeof (parent)); 4241 target = parent; 4242 } else { 4243 /* 4244 * Make sure we're renaming within the same dataset. 4245 */ 4246 delim = strchr(target, '@'); 4247 if (strncmp(zhp->zfs_name, target, delim - target) 4248 != 0 || zhp->zfs_name[delim - target] != '@') { 4249 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4250 "snapshots must be part of same " 4251 "dataset")); 4252 return (zfs_error(hdl, EZFS_CROSSTARGET, 4253 errbuf)); 4254 } 4255 } 4256 4257 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE)) 4258 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 4259 } else { 4260 if (recursive) { 4261 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4262 "recursive rename must be a snapshot")); 4263 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 4264 } 4265 4266 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE)) 4267 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 4268 4269 /* validate parents */ 4270 if (check_parents(hdl, target, NULL, B_FALSE, NULL) != 0) 4271 return (-1); 4272 4273 /* make sure we're in the same pool */ 4274 verify((delim = strchr(target, '/')) != NULL); 4275 if (strncmp(zhp->zfs_name, target, delim - target) != 0 || 4276 zhp->zfs_name[delim - target] != '/') { 4277 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4278 "datasets must be within same pool")); 4279 return (zfs_error(hdl, EZFS_CROSSTARGET, errbuf)); 4280 } 4281 4282 /* new name cannot be a child of the current dataset name */ 4283 if (is_descendant(zhp->zfs_name, target)) { 4284 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4285 "New dataset name cannot be a descendant of " 4286 "current dataset name")); 4287 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 4288 } 4289 } 4290 4291 (void) snprintf(errbuf, sizeof (errbuf), 4292 dgettext(TEXT_DOMAIN, "cannot rename '%s'"), zhp->zfs_name); 4293 4294 if (getzoneid() == GLOBAL_ZONEID && 4295 zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) { 4296 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4297 "dataset is used in a non-global zone")); 4298 return (zfs_error(hdl, EZFS_ZONED, errbuf)); 4299 } 4300 4301 if (recursive) { 4302 parentname = zfs_strdup(zhp->zfs_hdl, zhp->zfs_name); 4303 if (parentname == NULL) { 4304 ret = -1; 4305 goto error; 4306 } 4307 delim = strchr(parentname, '@'); 4308 *delim = '\0'; 4309 zhrp = zfs_open(zhp->zfs_hdl, parentname, ZFS_TYPE_DATASET); 4310 if (zhrp == NULL) { 4311 ret = -1; 4312 goto error; 4313 } 4314 } else if (zhp->zfs_type != ZFS_TYPE_SNAPSHOT) { 4315 if ((cl = changelist_gather(zhp, ZFS_PROP_NAME, 0, 4316 force_unmount ? MS_FORCE : 0)) == NULL) 4317 return (-1); 4318 4319 if (changelist_haszonedchild(cl)) { 4320 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4321 "child dataset with inherited mountpoint is used " 4322 "in a non-global zone")); 4323 (void) zfs_error(hdl, EZFS_ZONED, errbuf); 4324 ret = -1; 4325 goto error; 4326 } 4327 4328 if ((ret = changelist_prefix(cl)) != 0) 4329 goto error; 4330 } 4331 4332 if (ZFS_IS_VOLUME(zhp)) 4333 zc.zc_objset_type = DMU_OST_ZVOL; 4334 else 4335 zc.zc_objset_type = DMU_OST_ZFS; 4336 4337 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 4338 (void) strlcpy(zc.zc_value, target, sizeof (zc.zc_value)); 4339 4340 zc.zc_cookie = recursive; 4341 4342 if ((ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_RENAME, &zc)) != 0) { 4343 /* 4344 * if it was recursive, the one that actually failed will 4345 * be in zc.zc_name 4346 */ 4347 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 4348 "cannot rename '%s'"), zc.zc_name); 4349 4350 if (recursive && errno == EEXIST) { 4351 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4352 "a child dataset already has a snapshot " 4353 "with the new name")); 4354 (void) zfs_error(hdl, EZFS_EXISTS, errbuf); 4355 } else { 4356 (void) zfs_standard_error(zhp->zfs_hdl, errno, errbuf); 4357 } 4358 4359 /* 4360 * On failure, we still want to remount any filesystems that 4361 * were previously mounted, so we don't alter the system state. 4362 */ 4363 if (cl != NULL) 4364 (void) changelist_postfix(cl); 4365 } else { 4366 if (cl != NULL) { 4367 changelist_rename(cl, zfs_get_name(zhp), target); 4368 ret = changelist_postfix(cl); 4369 } 4370 } 4371 4372 error: 4373 if (parentname != NULL) { 4374 free(parentname); 4375 } 4376 if (zhrp != NULL) { 4377 zfs_close(zhrp); 4378 } 4379 if (cl != NULL) { 4380 changelist_free(cl); 4381 } 4382 return (ret); 4383 } 4384 4385 nvlist_t * 4386 zfs_get_user_props(zfs_handle_t *zhp) 4387 { 4388 return (zhp->zfs_user_props); 4389 } 4390 4391 nvlist_t * 4392 zfs_get_recvd_props(zfs_handle_t *zhp) 4393 { 4394 if (zhp->zfs_recvd_props == NULL) 4395 if (get_recvd_props_ioctl(zhp) != 0) 4396 return (NULL); 4397 return (zhp->zfs_recvd_props); 4398 } 4399 4400 /* 4401 * This function is used by 'zfs list' to determine the exact set of columns to 4402 * display, and their maximum widths. This does two main things: 4403 * 4404 * - If this is a list of all properties, then expand the list to include 4405 * all native properties, and set a flag so that for each dataset we look 4406 * for new unique user properties and add them to the list. 4407 * 4408 * - For non fixed-width properties, keep track of the maximum width seen 4409 * so that we can size the column appropriately. If the user has 4410 * requested received property values, we also need to compute the width 4411 * of the RECEIVED column. 4412 */ 4413 int 4414 zfs_expand_proplist(zfs_handle_t *zhp, zprop_list_t **plp, boolean_t received, 4415 boolean_t literal) 4416 { 4417 libzfs_handle_t *hdl = zhp->zfs_hdl; 4418 zprop_list_t *entry; 4419 zprop_list_t **last, **start; 4420 nvlist_t *userprops, *propval; 4421 nvpair_t *elem; 4422 char *strval; 4423 char buf[ZFS_MAXPROPLEN]; 4424 4425 if (zprop_expand_list(hdl, plp, ZFS_TYPE_DATASET) != 0) 4426 return (-1); 4427 4428 userprops = zfs_get_user_props(zhp); 4429 4430 entry = *plp; 4431 if (entry->pl_all && nvlist_next_nvpair(userprops, NULL) != NULL) { 4432 /* 4433 * Go through and add any user properties as necessary. We 4434 * start by incrementing our list pointer to the first 4435 * non-native property. 4436 */ 4437 start = plp; 4438 while (*start != NULL) { 4439 if ((*start)->pl_prop == ZPROP_INVAL) 4440 break; 4441 start = &(*start)->pl_next; 4442 } 4443 4444 elem = NULL; 4445 while ((elem = nvlist_next_nvpair(userprops, elem)) != NULL) { 4446 /* 4447 * See if we've already found this property in our list. 4448 */ 4449 for (last = start; *last != NULL; 4450 last = &(*last)->pl_next) { 4451 if (strcmp((*last)->pl_user_prop, 4452 nvpair_name(elem)) == 0) 4453 break; 4454 } 4455 4456 if (*last == NULL) { 4457 if ((entry = zfs_alloc(hdl, 4458 sizeof (zprop_list_t))) == NULL || 4459 ((entry->pl_user_prop = zfs_strdup(hdl, 4460 nvpair_name(elem)))) == NULL) { 4461 free(entry); 4462 return (-1); 4463 } 4464 4465 entry->pl_prop = ZPROP_INVAL; 4466 entry->pl_width = strlen(nvpair_name(elem)); 4467 entry->pl_all = B_TRUE; 4468 *last = entry; 4469 } 4470 } 4471 } 4472 4473 /* 4474 * Now go through and check the width of any non-fixed columns 4475 */ 4476 for (entry = *plp; entry != NULL; entry = entry->pl_next) { 4477 if (entry->pl_fixed && !literal) 4478 continue; 4479 4480 if (entry->pl_prop != ZPROP_INVAL) { 4481 if (zfs_prop_get(zhp, entry->pl_prop, 4482 buf, sizeof (buf), NULL, NULL, 0, literal) == 0) { 4483 if (strlen(buf) > entry->pl_width) 4484 entry->pl_width = strlen(buf); 4485 } 4486 if (received && zfs_prop_get_recvd(zhp, 4487 zfs_prop_to_name(entry->pl_prop), 4488 buf, sizeof (buf), literal) == 0) 4489 if (strlen(buf) > entry->pl_recvd_width) 4490 entry->pl_recvd_width = strlen(buf); 4491 } else { 4492 if (nvlist_lookup_nvlist(userprops, entry->pl_user_prop, 4493 &propval) == 0) { 4494 verify(nvlist_lookup_string(propval, 4495 ZPROP_VALUE, &strval) == 0); 4496 if (strlen(strval) > entry->pl_width) 4497 entry->pl_width = strlen(strval); 4498 } 4499 if (received && zfs_prop_get_recvd(zhp, 4500 entry->pl_user_prop, 4501 buf, sizeof (buf), literal) == 0) 4502 if (strlen(buf) > entry->pl_recvd_width) 4503 entry->pl_recvd_width = strlen(buf); 4504 } 4505 } 4506 4507 return (0); 4508 } 4509 4510 int 4511 zfs_deleg_share_nfs(libzfs_handle_t *hdl, char *dataset, char *path, 4512 char *resource, void *export, void *sharetab, 4513 int sharemax, zfs_share_op_t operation) 4514 { 4515 zfs_cmd_t zc = { 0 }; 4516 int error; 4517 4518 (void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name)); 4519 (void) strlcpy(zc.zc_value, path, sizeof (zc.zc_value)); 4520 if (resource) 4521 (void) strlcpy(zc.zc_string, resource, sizeof (zc.zc_string)); 4522 zc.zc_share.z_sharedata = (uint64_t)(uintptr_t)sharetab; 4523 zc.zc_share.z_exportdata = (uint64_t)(uintptr_t)export; 4524 zc.zc_share.z_sharetype = operation; 4525 zc.zc_share.z_sharemax = sharemax; 4526 error = ioctl(hdl->libzfs_fd, ZFS_IOC_SHARE, &zc); 4527 return (error); 4528 } 4529 4530 void 4531 zfs_prune_proplist(zfs_handle_t *zhp, uint8_t *props) 4532 { 4533 nvpair_t *curr; 4534 4535 /* 4536 * Keep a reference to the props-table against which we prune the 4537 * properties. 4538 */ 4539 zhp->zfs_props_table = props; 4540 4541 curr = nvlist_next_nvpair(zhp->zfs_props, NULL); 4542 4543 while (curr) { 4544 zfs_prop_t zfs_prop = zfs_name_to_prop(nvpair_name(curr)); 4545 nvpair_t *next = nvlist_next_nvpair(zhp->zfs_props, curr); 4546 4547 /* 4548 * User properties will result in ZPROP_INVAL, and since we 4549 * only know how to prune standard ZFS properties, we always 4550 * leave these in the list. This can also happen if we 4551 * encounter an unknown DSL property (when running older 4552 * software, for example). 4553 */ 4554 if (zfs_prop != ZPROP_INVAL && props[zfs_prop] == B_FALSE) 4555 (void) nvlist_remove(zhp->zfs_props, 4556 nvpair_name(curr), nvpair_type(curr)); 4557 curr = next; 4558 } 4559 } 4560 4561 static int 4562 zfs_smb_acl_mgmt(libzfs_handle_t *hdl, char *dataset, char *path, 4563 zfs_smb_acl_op_t cmd, char *resource1, char *resource2) 4564 { 4565 zfs_cmd_t zc = { 0 }; 4566 nvlist_t *nvlist = NULL; 4567 int error; 4568 4569 (void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name)); 4570 (void) strlcpy(zc.zc_value, path, sizeof (zc.zc_value)); 4571 zc.zc_cookie = (uint64_t)cmd; 4572 4573 if (cmd == ZFS_SMB_ACL_RENAME) { 4574 if (nvlist_alloc(&nvlist, NV_UNIQUE_NAME, 0) != 0) { 4575 (void) no_memory(hdl); 4576 return (0); 4577 } 4578 } 4579 4580 switch (cmd) { 4581 case ZFS_SMB_ACL_ADD: 4582 case ZFS_SMB_ACL_REMOVE: 4583 (void) strlcpy(zc.zc_string, resource1, sizeof (zc.zc_string)); 4584 break; 4585 case ZFS_SMB_ACL_RENAME: 4586 if (nvlist_add_string(nvlist, ZFS_SMB_ACL_SRC, 4587 resource1) != 0) { 4588 (void) no_memory(hdl); 4589 return (-1); 4590 } 4591 if (nvlist_add_string(nvlist, ZFS_SMB_ACL_TARGET, 4592 resource2) != 0) { 4593 (void) no_memory(hdl); 4594 return (-1); 4595 } 4596 if (zcmd_write_src_nvlist(hdl, &zc, nvlist) != 0) { 4597 nvlist_free(nvlist); 4598 return (-1); 4599 } 4600 break; 4601 case ZFS_SMB_ACL_PURGE: 4602 break; 4603 default: 4604 return (-1); 4605 } 4606 error = ioctl(hdl->libzfs_fd, ZFS_IOC_SMB_ACL, &zc); 4607 nvlist_free(nvlist); 4608 return (error); 4609 } 4610 4611 int 4612 zfs_smb_acl_add(libzfs_handle_t *hdl, char *dataset, 4613 char *path, char *resource) 4614 { 4615 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_ADD, 4616 resource, NULL)); 4617 } 4618 4619 int 4620 zfs_smb_acl_remove(libzfs_handle_t *hdl, char *dataset, 4621 char *path, char *resource) 4622 { 4623 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_REMOVE, 4624 resource, NULL)); 4625 } 4626 4627 int 4628 zfs_smb_acl_purge(libzfs_handle_t *hdl, char *dataset, char *path) 4629 { 4630 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_PURGE, 4631 NULL, NULL)); 4632 } 4633 4634 int 4635 zfs_smb_acl_rename(libzfs_handle_t *hdl, char *dataset, char *path, 4636 char *oldname, char *newname) 4637 { 4638 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_RENAME, 4639 oldname, newname)); 4640 } 4641 4642 int 4643 zfs_userspace(zfs_handle_t *zhp, zfs_userquota_prop_t type, 4644 zfs_userspace_cb_t func, void *arg) 4645 { 4646 zfs_cmd_t zc = { 0 }; 4647 zfs_useracct_t buf[100]; 4648 libzfs_handle_t *hdl = zhp->zfs_hdl; 4649 int ret; 4650 4651 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 4652 4653 zc.zc_objset_type = type; 4654 zc.zc_nvlist_dst = (uintptr_t)buf; 4655 4656 for (;;) { 4657 zfs_useracct_t *zua = buf; 4658 4659 zc.zc_nvlist_dst_size = sizeof (buf); 4660 if (zfs_ioctl(hdl, ZFS_IOC_USERSPACE_MANY, &zc) != 0) { 4661 char errbuf[1024]; 4662 4663 (void) snprintf(errbuf, sizeof (errbuf), 4664 dgettext(TEXT_DOMAIN, 4665 "cannot get used/quota for %s"), zc.zc_name); 4666 return (zfs_standard_error_fmt(hdl, errno, errbuf)); 4667 } 4668 if (zc.zc_nvlist_dst_size == 0) 4669 break; 4670 4671 while (zc.zc_nvlist_dst_size > 0) { 4672 if ((ret = func(arg, zua->zu_domain, zua->zu_rid, 4673 zua->zu_space)) != 0) 4674 return (ret); 4675 zua++; 4676 zc.zc_nvlist_dst_size -= sizeof (zfs_useracct_t); 4677 } 4678 } 4679 4680 return (0); 4681 } 4682 4683 struct holdarg { 4684 nvlist_t *nvl; 4685 const char *snapname; 4686 const char *tag; 4687 boolean_t recursive; 4688 int error; 4689 }; 4690 4691 static int 4692 zfs_hold_one(zfs_handle_t *zhp, void *arg) 4693 { 4694 struct holdarg *ha = arg; 4695 char name[ZFS_MAX_DATASET_NAME_LEN]; 4696 int rv = 0; 4697 4698 (void) snprintf(name, sizeof (name), 4699 "%s@%s", zhp->zfs_name, ha->snapname); 4700 4701 if (lzc_exists(name)) 4702 fnvlist_add_string(ha->nvl, name, ha->tag); 4703 4704 if (ha->recursive) 4705 rv = zfs_iter_filesystems(zhp, zfs_hold_one, ha); 4706 zfs_close(zhp); 4707 return (rv); 4708 } 4709 4710 int 4711 zfs_hold(zfs_handle_t *zhp, const char *snapname, const char *tag, 4712 boolean_t recursive, int cleanup_fd) 4713 { 4714 int ret; 4715 struct holdarg ha; 4716 4717 ha.nvl = fnvlist_alloc(); 4718 ha.snapname = snapname; 4719 ha.tag = tag; 4720 ha.recursive = recursive; 4721 (void) zfs_hold_one(zfs_handle_dup(zhp), &ha); 4722 4723 if (nvlist_empty(ha.nvl)) { 4724 char errbuf[1024]; 4725 4726 fnvlist_free(ha.nvl); 4727 ret = ENOENT; 4728 (void) snprintf(errbuf, sizeof (errbuf), 4729 dgettext(TEXT_DOMAIN, 4730 "cannot hold snapshot '%s@%s'"), 4731 zhp->zfs_name, snapname); 4732 (void) zfs_standard_error(zhp->zfs_hdl, ret, errbuf); 4733 return (ret); 4734 } 4735 4736 ret = zfs_hold_nvl(zhp, cleanup_fd, ha.nvl); 4737 fnvlist_free(ha.nvl); 4738 4739 return (ret); 4740 } 4741 4742 int 4743 zfs_hold_nvl(zfs_handle_t *zhp, int cleanup_fd, nvlist_t *holds) 4744 { 4745 int ret; 4746 nvlist_t *errors; 4747 libzfs_handle_t *hdl = zhp->zfs_hdl; 4748 char errbuf[1024]; 4749 nvpair_t *elem; 4750 4751 errors = NULL; 4752 ret = lzc_hold(holds, cleanup_fd, &errors); 4753 4754 if (ret == 0) { 4755 /* There may be errors even in the success case. */ 4756 fnvlist_free(errors); 4757 return (0); 4758 } 4759 4760 if (nvlist_empty(errors)) { 4761 /* no hold-specific errors */ 4762 (void) snprintf(errbuf, sizeof (errbuf), 4763 dgettext(TEXT_DOMAIN, "cannot hold")); 4764 switch (ret) { 4765 case ENOTSUP: 4766 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4767 "pool must be upgraded")); 4768 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf); 4769 break; 4770 case EINVAL: 4771 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf); 4772 break; 4773 default: 4774 (void) zfs_standard_error(hdl, ret, errbuf); 4775 } 4776 } 4777 4778 for (elem = nvlist_next_nvpair(errors, NULL); 4779 elem != NULL; 4780 elem = nvlist_next_nvpair(errors, elem)) { 4781 (void) snprintf(errbuf, sizeof (errbuf), 4782 dgettext(TEXT_DOMAIN, 4783 "cannot hold snapshot '%s'"), nvpair_name(elem)); 4784 switch (fnvpair_value_int32(elem)) { 4785 case E2BIG: 4786 /* 4787 * Temporary tags wind up having the ds object id 4788 * prepended. So even if we passed the length check 4789 * above, it's still possible for the tag to wind 4790 * up being slightly too long. 4791 */ 4792 (void) zfs_error(hdl, EZFS_TAGTOOLONG, errbuf); 4793 break; 4794 case EINVAL: 4795 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf); 4796 break; 4797 case EEXIST: 4798 (void) zfs_error(hdl, EZFS_REFTAG_HOLD, errbuf); 4799 break; 4800 default: 4801 (void) zfs_standard_error(hdl, 4802 fnvpair_value_int32(elem), errbuf); 4803 } 4804 } 4805 4806 fnvlist_free(errors); 4807 return (ret); 4808 } 4809 4810 static int 4811 zfs_release_one(zfs_handle_t *zhp, void *arg) 4812 { 4813 struct holdarg *ha = arg; 4814 char name[ZFS_MAX_DATASET_NAME_LEN]; 4815 int rv = 0; 4816 nvlist_t *existing_holds; 4817 4818 (void) snprintf(name, sizeof (name), 4819 "%s@%s", zhp->zfs_name, ha->snapname); 4820 4821 if (lzc_get_holds(name, &existing_holds) != 0) { 4822 ha->error = ENOENT; 4823 } else if (!nvlist_exists(existing_holds, ha->tag)) { 4824 ha->error = ESRCH; 4825 } else { 4826 nvlist_t *torelease = fnvlist_alloc(); 4827 fnvlist_add_boolean(torelease, ha->tag); 4828 fnvlist_add_nvlist(ha->nvl, name, torelease); 4829 fnvlist_free(torelease); 4830 } 4831 4832 if (ha->recursive) 4833 rv = zfs_iter_filesystems(zhp, zfs_release_one, ha); 4834 zfs_close(zhp); 4835 return (rv); 4836 } 4837 4838 int 4839 zfs_release(zfs_handle_t *zhp, const char *snapname, const char *tag, 4840 boolean_t recursive) 4841 { 4842 int ret; 4843 struct holdarg ha; 4844 nvlist_t *errors = NULL; 4845 nvpair_t *elem; 4846 libzfs_handle_t *hdl = zhp->zfs_hdl; 4847 char errbuf[1024]; 4848 4849 ha.nvl = fnvlist_alloc(); 4850 ha.snapname = snapname; 4851 ha.tag = tag; 4852 ha.recursive = recursive; 4853 ha.error = 0; 4854 (void) zfs_release_one(zfs_handle_dup(zhp), &ha); 4855 4856 if (nvlist_empty(ha.nvl)) { 4857 fnvlist_free(ha.nvl); 4858 ret = ha.error; 4859 (void) snprintf(errbuf, sizeof (errbuf), 4860 dgettext(TEXT_DOMAIN, 4861 "cannot release hold from snapshot '%s@%s'"), 4862 zhp->zfs_name, snapname); 4863 if (ret == ESRCH) { 4864 (void) zfs_error(hdl, EZFS_REFTAG_RELE, errbuf); 4865 } else { 4866 (void) zfs_standard_error(hdl, ret, errbuf); 4867 } 4868 return (ret); 4869 } 4870 4871 ret = lzc_release(ha.nvl, &errors); 4872 fnvlist_free(ha.nvl); 4873 4874 if (ret == 0) { 4875 /* There may be errors even in the success case. */ 4876 fnvlist_free(errors); 4877 return (0); 4878 } 4879 4880 if (nvlist_empty(errors)) { 4881 /* no hold-specific errors */ 4882 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 4883 "cannot release")); 4884 switch (errno) { 4885 case ENOTSUP: 4886 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4887 "pool must be upgraded")); 4888 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf); 4889 break; 4890 default: 4891 (void) zfs_standard_error_fmt(hdl, errno, errbuf); 4892 } 4893 } 4894 4895 for (elem = nvlist_next_nvpair(errors, NULL); 4896 elem != NULL; 4897 elem = nvlist_next_nvpair(errors, elem)) { 4898 (void) snprintf(errbuf, sizeof (errbuf), 4899 dgettext(TEXT_DOMAIN, 4900 "cannot release hold from snapshot '%s'"), 4901 nvpair_name(elem)); 4902 switch (fnvpair_value_int32(elem)) { 4903 case ESRCH: 4904 (void) zfs_error(hdl, EZFS_REFTAG_RELE, errbuf); 4905 break; 4906 case EINVAL: 4907 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf); 4908 break; 4909 default: 4910 (void) zfs_standard_error_fmt(hdl, 4911 fnvpair_value_int32(elem), errbuf); 4912 } 4913 } 4914 4915 fnvlist_free(errors); 4916 return (ret); 4917 } 4918 4919 int 4920 zfs_get_fsacl(zfs_handle_t *zhp, nvlist_t **nvl) 4921 { 4922 zfs_cmd_t zc = { 0 }; 4923 libzfs_handle_t *hdl = zhp->zfs_hdl; 4924 int nvsz = 2048; 4925 void *nvbuf; 4926 int err = 0; 4927 char errbuf[1024]; 4928 4929 assert(zhp->zfs_type == ZFS_TYPE_VOLUME || 4930 zhp->zfs_type == ZFS_TYPE_FILESYSTEM); 4931 4932 tryagain: 4933 4934 nvbuf = malloc(nvsz); 4935 if (nvbuf == NULL) { 4936 err = (zfs_error(hdl, EZFS_NOMEM, strerror(errno))); 4937 goto out; 4938 } 4939 4940 zc.zc_nvlist_dst_size = nvsz; 4941 zc.zc_nvlist_dst = (uintptr_t)nvbuf; 4942 4943 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 4944 4945 if (ioctl(hdl->libzfs_fd, ZFS_IOC_GET_FSACL, &zc) != 0) { 4946 (void) snprintf(errbuf, sizeof (errbuf), 4947 dgettext(TEXT_DOMAIN, "cannot get permissions on '%s'"), 4948 zc.zc_name); 4949 switch (errno) { 4950 case ENOMEM: 4951 free(nvbuf); 4952 nvsz = zc.zc_nvlist_dst_size; 4953 goto tryagain; 4954 4955 case ENOTSUP: 4956 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4957 "pool must be upgraded")); 4958 err = zfs_error(hdl, EZFS_BADVERSION, errbuf); 4959 break; 4960 case EINVAL: 4961 err = zfs_error(hdl, EZFS_BADTYPE, errbuf); 4962 break; 4963 case ENOENT: 4964 err = zfs_error(hdl, EZFS_NOENT, errbuf); 4965 break; 4966 default: 4967 err = zfs_standard_error_fmt(hdl, errno, errbuf); 4968 break; 4969 } 4970 } else { 4971 /* success */ 4972 int rc = nvlist_unpack(nvbuf, zc.zc_nvlist_dst_size, nvl, 0); 4973 if (rc) { 4974 (void) snprintf(errbuf, sizeof (errbuf), dgettext( 4975 TEXT_DOMAIN, "cannot get permissions on '%s'"), 4976 zc.zc_name); 4977 err = zfs_standard_error_fmt(hdl, rc, errbuf); 4978 } 4979 } 4980 4981 free(nvbuf); 4982 out: 4983 return (err); 4984 } 4985 4986 int 4987 zfs_set_fsacl(zfs_handle_t *zhp, boolean_t un, nvlist_t *nvl) 4988 { 4989 zfs_cmd_t zc = { 0 }; 4990 libzfs_handle_t *hdl = zhp->zfs_hdl; 4991 char *nvbuf; 4992 char errbuf[1024]; 4993 size_t nvsz; 4994 int err; 4995 4996 assert(zhp->zfs_type == ZFS_TYPE_VOLUME || 4997 zhp->zfs_type == ZFS_TYPE_FILESYSTEM); 4998 4999 err = nvlist_size(nvl, &nvsz, NV_ENCODE_NATIVE); 5000 assert(err == 0); 5001 5002 nvbuf = malloc(nvsz); 5003 5004 err = nvlist_pack(nvl, &nvbuf, &nvsz, NV_ENCODE_NATIVE, 0); 5005 assert(err == 0); 5006 5007 zc.zc_nvlist_src_size = nvsz; 5008 zc.zc_nvlist_src = (uintptr_t)nvbuf; 5009 zc.zc_perm_action = un; 5010 5011 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 5012 5013 if (zfs_ioctl(hdl, ZFS_IOC_SET_FSACL, &zc) != 0) { 5014 (void) snprintf(errbuf, sizeof (errbuf), 5015 dgettext(TEXT_DOMAIN, "cannot set permissions on '%s'"), 5016 zc.zc_name); 5017 switch (errno) { 5018 case ENOTSUP: 5019 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 5020 "pool must be upgraded")); 5021 err = zfs_error(hdl, EZFS_BADVERSION, errbuf); 5022 break; 5023 case EINVAL: 5024 err = zfs_error(hdl, EZFS_BADTYPE, errbuf); 5025 break; 5026 case ENOENT: 5027 err = zfs_error(hdl, EZFS_NOENT, errbuf); 5028 break; 5029 default: 5030 err = zfs_standard_error_fmt(hdl, errno, errbuf); 5031 break; 5032 } 5033 } 5034 5035 free(nvbuf); 5036 5037 return (err); 5038 } 5039 5040 int 5041 zfs_get_holds(zfs_handle_t *zhp, nvlist_t **nvl) 5042 { 5043 int err; 5044 char errbuf[1024]; 5045 5046 err = lzc_get_holds(zhp->zfs_name, nvl); 5047 5048 if (err != 0) { 5049 libzfs_handle_t *hdl = zhp->zfs_hdl; 5050 5051 (void) snprintf(errbuf, sizeof (errbuf), 5052 dgettext(TEXT_DOMAIN, "cannot get holds for '%s'"), 5053 zhp->zfs_name); 5054 switch (err) { 5055 case ENOTSUP: 5056 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 5057 "pool must be upgraded")); 5058 err = zfs_error(hdl, EZFS_BADVERSION, errbuf); 5059 break; 5060 case EINVAL: 5061 err = zfs_error(hdl, EZFS_BADTYPE, errbuf); 5062 break; 5063 case ENOENT: 5064 err = zfs_error(hdl, EZFS_NOENT, errbuf); 5065 break; 5066 default: 5067 err = zfs_standard_error_fmt(hdl, errno, errbuf); 5068 break; 5069 } 5070 } 5071 5072 return (err); 5073 } 5074 5075 /* 5076 * Convert the zvol's volume size to an appropriate reservation. 5077 * Note: If this routine is updated, it is necessary to update the ZFS test 5078 * suite's shell version in reservation.kshlib. 5079 */ 5080 uint64_t 5081 zvol_volsize_to_reservation(uint64_t volsize, nvlist_t *props) 5082 { 5083 uint64_t numdb; 5084 uint64_t nblocks, volblocksize; 5085 int ncopies; 5086 char *strval; 5087 5088 if (nvlist_lookup_string(props, 5089 zfs_prop_to_name(ZFS_PROP_COPIES), &strval) == 0) 5090 ncopies = atoi(strval); 5091 else 5092 ncopies = 1; 5093 if (nvlist_lookup_uint64(props, 5094 zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE), 5095 &volblocksize) != 0) 5096 volblocksize = ZVOL_DEFAULT_BLOCKSIZE; 5097 nblocks = volsize/volblocksize; 5098 /* start with metadnode L0-L6 */ 5099 numdb = 7; 5100 /* calculate number of indirects */ 5101 while (nblocks > 1) { 5102 nblocks += DNODES_PER_LEVEL - 1; 5103 nblocks /= DNODES_PER_LEVEL; 5104 numdb += nblocks; 5105 } 5106 numdb *= MIN(SPA_DVAS_PER_BP, ncopies + 1); 5107 volsize *= ncopies; 5108 /* 5109 * this is exactly DN_MAX_INDBLKSHIFT when metadata isn't 5110 * compressed, but in practice they compress down to about 5111 * 1100 bytes 5112 */ 5113 numdb *= 1ULL << DN_MAX_INDBLKSHIFT; 5114 volsize += numdb; 5115 return (volsize); 5116 } 5117