libzfs_dataset.c revision 1.1.1.3
1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 24 * Copyright (c) 2013, Joyent, Inc. All rights reserved. 25 * Copyright (c) 2011, 2015 by Delphix. All rights reserved. 26 * Copyright (c) 2012 DEY Storage Systems, Inc. All rights reserved. 27 * Copyright (c) 2011-2012 Pawel Jakub Dawidek. All rights reserved. 28 * Copyright (c) 2013 Martin Matuska. All rights reserved. 29 * Copyright (c) 2013 Steven Hartland. All rights reserved. 30 * Copyright (c) 2014 Integros [integros.com] 31 * Copyright 2016 Nexenta Systems, Inc. 32 * Copyright 2016 Igor Kozhukhov <ikozhukhov (at) gmail.com> 33 */ 34 35 #include <ctype.h> 36 #include <errno.h> 37 #include <libintl.h> 38 #include <math.h> 39 #include <stdio.h> 40 #include <stdlib.h> 41 #include <strings.h> 42 #include <unistd.h> 43 #include <stddef.h> 44 #include <zone.h> 45 #include <fcntl.h> 46 #include <sys/mntent.h> 47 #include <sys/mount.h> 48 #include <priv.h> 49 #include <pwd.h> 50 #include <grp.h> 51 #include <stddef.h> 52 #include <idmap.h> 53 54 #include <sys/dnode.h> 55 #include <sys/spa.h> 56 #include <sys/zap.h> 57 #include <sys/misc.h> 58 #include <libzfs.h> 59 60 #include "zfs_namecheck.h" 61 #include "zfs_prop.h" 62 #include "libzfs_impl.h" 63 #include "zfs_deleg.h" 64 65 static int userquota_propname_decode(const char *propname, boolean_t zoned, 66 zfs_userquota_prop_t *typep, char *domain, int domainlen, uint64_t *ridp); 67 68 /* 69 * Given a single type (not a mask of types), return the type in a human 70 * readable form. 71 */ 72 const char * 73 zfs_type_to_name(zfs_type_t type) 74 { 75 switch (type) { 76 case ZFS_TYPE_FILESYSTEM: 77 return (dgettext(TEXT_DOMAIN, "filesystem")); 78 case ZFS_TYPE_SNAPSHOT: 79 return (dgettext(TEXT_DOMAIN, "snapshot")); 80 case ZFS_TYPE_VOLUME: 81 return (dgettext(TEXT_DOMAIN, "volume")); 82 case ZFS_TYPE_POOL: 83 return (dgettext(TEXT_DOMAIN, "pool")); 84 case ZFS_TYPE_BOOKMARK: 85 return (dgettext(TEXT_DOMAIN, "bookmark")); 86 default: 87 assert(!"unhandled zfs_type_t"); 88 } 89 90 return (NULL); 91 } 92 93 /* 94 * Validate a ZFS path. This is used even before trying to open the dataset, to 95 * provide a more meaningful error message. We call zfs_error_aux() to 96 * explain exactly why the name was not valid. 97 */ 98 int 99 zfs_validate_name(libzfs_handle_t *hdl, const char *path, int type, 100 boolean_t modifying) 101 { 102 namecheck_err_t why; 103 char what; 104 105 (void) zfs_prop_get_table(); 106 if (dataset_namecheck(path, &why, &what) != 0) { 107 if (hdl != NULL) { 108 switch (why) { 109 case NAME_ERR_TOOLONG: 110 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 111 "name is too long")); 112 break; 113 114 case NAME_ERR_LEADING_SLASH: 115 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 116 "leading slash in name")); 117 break; 118 119 case NAME_ERR_EMPTY_COMPONENT: 120 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 121 "empty component in name")); 122 break; 123 124 case NAME_ERR_TRAILING_SLASH: 125 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 126 "trailing slash in name")); 127 break; 128 129 case NAME_ERR_INVALCHAR: 130 zfs_error_aux(hdl, 131 dgettext(TEXT_DOMAIN, "invalid character " 132 "'%c' in name"), what); 133 break; 134 135 case NAME_ERR_MULTIPLE_AT: 136 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 137 "multiple '@' delimiters in name")); 138 break; 139 140 case NAME_ERR_NOLETTER: 141 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 142 "pool doesn't begin with a letter")); 143 break; 144 145 case NAME_ERR_RESERVED: 146 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 147 "name is reserved")); 148 break; 149 150 case NAME_ERR_DISKLIKE: 151 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 152 "reserved disk name")); 153 break; 154 155 default: 156 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 157 "(%d) not defined"), why); 158 break; 159 } 160 } 161 162 return (0); 163 } 164 165 if (!(type & ZFS_TYPE_SNAPSHOT) && strchr(path, '@') != NULL) { 166 if (hdl != NULL) 167 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 168 "snapshot delimiter '@' in filesystem name")); 169 return (0); 170 } 171 172 if (type == ZFS_TYPE_SNAPSHOT && strchr(path, '@') == NULL) { 173 if (hdl != NULL) 174 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 175 "missing '@' delimiter in snapshot name")); 176 return (0); 177 } 178 179 if (modifying && strchr(path, '%') != NULL) { 180 if (hdl != NULL) 181 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 182 "invalid character %c in name"), '%'); 183 return (0); 184 } 185 186 return (-1); 187 } 188 189 int 190 zfs_name_valid(const char *name, zfs_type_t type) 191 { 192 if (type == ZFS_TYPE_POOL) 193 return (zpool_name_valid(NULL, B_FALSE, name)); 194 return (zfs_validate_name(NULL, name, type, B_FALSE)); 195 } 196 197 /* 198 * This function takes the raw DSL properties, and filters out the user-defined 199 * properties into a separate nvlist. 200 */ 201 static nvlist_t * 202 process_user_props(zfs_handle_t *zhp, nvlist_t *props) 203 { 204 libzfs_handle_t *hdl = zhp->zfs_hdl; 205 nvpair_t *elem; 206 nvlist_t *propval; 207 nvlist_t *nvl; 208 209 if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0) { 210 (void) no_memory(hdl); 211 return (NULL); 212 } 213 214 elem = NULL; 215 while ((elem = nvlist_next_nvpair(props, elem)) != NULL) { 216 if (!zfs_prop_user(nvpair_name(elem))) 217 continue; 218 219 verify(nvpair_value_nvlist(elem, &propval) == 0); 220 if (nvlist_add_nvlist(nvl, nvpair_name(elem), propval) != 0) { 221 nvlist_free(nvl); 222 (void) no_memory(hdl); 223 return (NULL); 224 } 225 } 226 227 return (nvl); 228 } 229 230 static zpool_handle_t * 231 zpool_add_handle(zfs_handle_t *zhp, const char *pool_name) 232 { 233 libzfs_handle_t *hdl = zhp->zfs_hdl; 234 zpool_handle_t *zph; 235 236 if ((zph = zpool_open_canfail(hdl, pool_name)) != NULL) { 237 if (hdl->libzfs_pool_handles != NULL) 238 zph->zpool_next = hdl->libzfs_pool_handles; 239 hdl->libzfs_pool_handles = zph; 240 } 241 return (zph); 242 } 243 244 static zpool_handle_t * 245 zpool_find_handle(zfs_handle_t *zhp, const char *pool_name, int len) 246 { 247 libzfs_handle_t *hdl = zhp->zfs_hdl; 248 zpool_handle_t *zph = hdl->libzfs_pool_handles; 249 250 while ((zph != NULL) && 251 (strncmp(pool_name, zpool_get_name(zph), len) != 0)) 252 zph = zph->zpool_next; 253 return (zph); 254 } 255 256 /* 257 * Returns a handle to the pool that contains the provided dataset. 258 * If a handle to that pool already exists then that handle is returned. 259 * Otherwise, a new handle is created and added to the list of handles. 260 */ 261 static zpool_handle_t * 262 zpool_handle(zfs_handle_t *zhp) 263 { 264 char *pool_name; 265 int len; 266 zpool_handle_t *zph; 267 268 len = strcspn(zhp->zfs_name, "/@#") + 1; 269 pool_name = zfs_alloc(zhp->zfs_hdl, len); 270 (void) strlcpy(pool_name, zhp->zfs_name, len); 271 272 zph = zpool_find_handle(zhp, pool_name, len); 273 if (zph == NULL) 274 zph = zpool_add_handle(zhp, pool_name); 275 276 free(pool_name); 277 return (zph); 278 } 279 280 void 281 zpool_free_handles(libzfs_handle_t *hdl) 282 { 283 zpool_handle_t *next, *zph = hdl->libzfs_pool_handles; 284 285 while (zph != NULL) { 286 next = zph->zpool_next; 287 zpool_close(zph); 288 zph = next; 289 } 290 hdl->libzfs_pool_handles = NULL; 291 } 292 293 /* 294 * Utility function to gather stats (objset and zpl) for the given object. 295 */ 296 static int 297 get_stats_ioctl(zfs_handle_t *zhp, zfs_cmd_t *zc) 298 { 299 libzfs_handle_t *hdl = zhp->zfs_hdl; 300 301 (void) strlcpy(zc->zc_name, zhp->zfs_name, sizeof (zc->zc_name)); 302 303 while (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_STATS, zc) != 0) { 304 if (errno == ENOMEM) { 305 if (zcmd_expand_dst_nvlist(hdl, zc) != 0) { 306 return (-1); 307 } 308 } else { 309 return (-1); 310 } 311 } 312 return (0); 313 } 314 315 /* 316 * Utility function to get the received properties of the given object. 317 */ 318 static int 319 get_recvd_props_ioctl(zfs_handle_t *zhp) 320 { 321 libzfs_handle_t *hdl = zhp->zfs_hdl; 322 nvlist_t *recvdprops; 323 zfs_cmd_t zc = { 0 }; 324 int err; 325 326 if (zcmd_alloc_dst_nvlist(hdl, &zc, 0) != 0) 327 return (-1); 328 329 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 330 331 while (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_RECVD_PROPS, &zc) != 0) { 332 if (errno == ENOMEM) { 333 if (zcmd_expand_dst_nvlist(hdl, &zc) != 0) { 334 return (-1); 335 } 336 } else { 337 zcmd_free_nvlists(&zc); 338 return (-1); 339 } 340 } 341 342 err = zcmd_read_dst_nvlist(zhp->zfs_hdl, &zc, &recvdprops); 343 zcmd_free_nvlists(&zc); 344 if (err != 0) 345 return (-1); 346 347 nvlist_free(zhp->zfs_recvd_props); 348 zhp->zfs_recvd_props = recvdprops; 349 350 return (0); 351 } 352 353 static int 354 put_stats_zhdl(zfs_handle_t *zhp, zfs_cmd_t *zc) 355 { 356 nvlist_t *allprops, *userprops; 357 358 zhp->zfs_dmustats = zc->zc_objset_stats; /* structure assignment */ 359 360 if (zcmd_read_dst_nvlist(zhp->zfs_hdl, zc, &allprops) != 0) { 361 return (-1); 362 } 363 364 /* 365 * XXX Why do we store the user props separately, in addition to 366 * storing them in zfs_props? 367 */ 368 if ((userprops = process_user_props(zhp, allprops)) == NULL) { 369 nvlist_free(allprops); 370 return (-1); 371 } 372 373 nvlist_free(zhp->zfs_props); 374 nvlist_free(zhp->zfs_user_props); 375 376 zhp->zfs_props = allprops; 377 zhp->zfs_user_props = userprops; 378 379 return (0); 380 } 381 382 static int 383 get_stats(zfs_handle_t *zhp) 384 { 385 int rc = 0; 386 zfs_cmd_t zc = { 0 }; 387 388 if (zcmd_alloc_dst_nvlist(zhp->zfs_hdl, &zc, 0) != 0) 389 return (-1); 390 if (get_stats_ioctl(zhp, &zc) != 0) 391 rc = -1; 392 else if (put_stats_zhdl(zhp, &zc) != 0) 393 rc = -1; 394 zcmd_free_nvlists(&zc); 395 return (rc); 396 } 397 398 /* 399 * Refresh the properties currently stored in the handle. 400 */ 401 void 402 zfs_refresh_properties(zfs_handle_t *zhp) 403 { 404 (void) get_stats(zhp); 405 } 406 407 /* 408 * Makes a handle from the given dataset name. Used by zfs_open() and 409 * zfs_iter_* to create child handles on the fly. 410 */ 411 static int 412 make_dataset_handle_common(zfs_handle_t *zhp, zfs_cmd_t *zc) 413 { 414 if (put_stats_zhdl(zhp, zc) != 0) 415 return (-1); 416 417 /* 418 * We've managed to open the dataset and gather statistics. Determine 419 * the high-level type. 420 */ 421 if (zhp->zfs_dmustats.dds_type == DMU_OST_ZVOL) 422 zhp->zfs_head_type = ZFS_TYPE_VOLUME; 423 else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZFS) 424 zhp->zfs_head_type = ZFS_TYPE_FILESYSTEM; 425 else 426 abort(); 427 428 if (zhp->zfs_dmustats.dds_is_snapshot) 429 zhp->zfs_type = ZFS_TYPE_SNAPSHOT; 430 else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZVOL) 431 zhp->zfs_type = ZFS_TYPE_VOLUME; 432 else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZFS) 433 zhp->zfs_type = ZFS_TYPE_FILESYSTEM; 434 else 435 abort(); /* we should never see any other types */ 436 437 if ((zhp->zpool_hdl = zpool_handle(zhp)) == NULL) 438 return (-1); 439 440 return (0); 441 } 442 443 zfs_handle_t * 444 make_dataset_handle(libzfs_handle_t *hdl, const char *path) 445 { 446 zfs_cmd_t zc = { 0 }; 447 448 zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1); 449 450 if (zhp == NULL) 451 return (NULL); 452 453 zhp->zfs_hdl = hdl; 454 (void) strlcpy(zhp->zfs_name, path, sizeof (zhp->zfs_name)); 455 if (zcmd_alloc_dst_nvlist(hdl, &zc, 0) != 0) { 456 free(zhp); 457 return (NULL); 458 } 459 if (get_stats_ioctl(zhp, &zc) == -1) { 460 zcmd_free_nvlists(&zc); 461 free(zhp); 462 return (NULL); 463 } 464 if (make_dataset_handle_common(zhp, &zc) == -1) { 465 free(zhp); 466 zhp = NULL; 467 } 468 zcmd_free_nvlists(&zc); 469 return (zhp); 470 } 471 472 zfs_handle_t * 473 make_dataset_handle_zc(libzfs_handle_t *hdl, zfs_cmd_t *zc) 474 { 475 zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1); 476 477 if (zhp == NULL) 478 return (NULL); 479 480 zhp->zfs_hdl = hdl; 481 (void) strlcpy(zhp->zfs_name, zc->zc_name, sizeof (zhp->zfs_name)); 482 if (make_dataset_handle_common(zhp, zc) == -1) { 483 free(zhp); 484 return (NULL); 485 } 486 return (zhp); 487 } 488 489 zfs_handle_t * 490 make_dataset_simple_handle_zc(zfs_handle_t *pzhp, zfs_cmd_t *zc) 491 { 492 zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1); 493 494 if (zhp == NULL) 495 return (NULL); 496 497 zhp->zfs_hdl = pzhp->zfs_hdl; 498 (void) strlcpy(zhp->zfs_name, zc->zc_name, sizeof (zhp->zfs_name)); 499 zhp->zfs_head_type = pzhp->zfs_type; 500 zhp->zfs_type = ZFS_TYPE_SNAPSHOT; 501 zhp->zpool_hdl = zpool_handle(zhp); 502 return (zhp); 503 } 504 505 zfs_handle_t * 506 zfs_handle_dup(zfs_handle_t *zhp_orig) 507 { 508 zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1); 509 510 if (zhp == NULL) 511 return (NULL); 512 513 zhp->zfs_hdl = zhp_orig->zfs_hdl; 514 zhp->zpool_hdl = zhp_orig->zpool_hdl; 515 (void) strlcpy(zhp->zfs_name, zhp_orig->zfs_name, 516 sizeof (zhp->zfs_name)); 517 zhp->zfs_type = zhp_orig->zfs_type; 518 zhp->zfs_head_type = zhp_orig->zfs_head_type; 519 zhp->zfs_dmustats = zhp_orig->zfs_dmustats; 520 if (zhp_orig->zfs_props != NULL) { 521 if (nvlist_dup(zhp_orig->zfs_props, &zhp->zfs_props, 0) != 0) { 522 (void) no_memory(zhp->zfs_hdl); 523 zfs_close(zhp); 524 return (NULL); 525 } 526 } 527 if (zhp_orig->zfs_user_props != NULL) { 528 if (nvlist_dup(zhp_orig->zfs_user_props, 529 &zhp->zfs_user_props, 0) != 0) { 530 (void) no_memory(zhp->zfs_hdl); 531 zfs_close(zhp); 532 return (NULL); 533 } 534 } 535 if (zhp_orig->zfs_recvd_props != NULL) { 536 if (nvlist_dup(zhp_orig->zfs_recvd_props, 537 &zhp->zfs_recvd_props, 0)) { 538 (void) no_memory(zhp->zfs_hdl); 539 zfs_close(zhp); 540 return (NULL); 541 } 542 } 543 zhp->zfs_mntcheck = zhp_orig->zfs_mntcheck; 544 if (zhp_orig->zfs_mntopts != NULL) { 545 zhp->zfs_mntopts = zfs_strdup(zhp_orig->zfs_hdl, 546 zhp_orig->zfs_mntopts); 547 } 548 zhp->zfs_props_table = zhp_orig->zfs_props_table; 549 return (zhp); 550 } 551 552 boolean_t 553 zfs_bookmark_exists(const char *path) 554 { 555 nvlist_t *bmarks; 556 nvlist_t *props; 557 char fsname[ZFS_MAX_DATASET_NAME_LEN]; 558 char *bmark_name; 559 char *pound; 560 int err; 561 boolean_t rv; 562 563 564 (void) strlcpy(fsname, path, sizeof (fsname)); 565 pound = strchr(fsname, '#'); 566 if (pound == NULL) 567 return (B_FALSE); 568 569 *pound = '\0'; 570 bmark_name = pound + 1; 571 props = fnvlist_alloc(); 572 err = lzc_get_bookmarks(fsname, props, &bmarks); 573 nvlist_free(props); 574 if (err != 0) { 575 nvlist_free(bmarks); 576 return (B_FALSE); 577 } 578 579 rv = nvlist_exists(bmarks, bmark_name); 580 nvlist_free(bmarks); 581 return (rv); 582 } 583 584 zfs_handle_t * 585 make_bookmark_handle(zfs_handle_t *parent, const char *path, 586 nvlist_t *bmark_props) 587 { 588 zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1); 589 590 if (zhp == NULL) 591 return (NULL); 592 593 /* Fill in the name. */ 594 zhp->zfs_hdl = parent->zfs_hdl; 595 (void) strlcpy(zhp->zfs_name, path, sizeof (zhp->zfs_name)); 596 597 /* Set the property lists. */ 598 if (nvlist_dup(bmark_props, &zhp->zfs_props, 0) != 0) { 599 free(zhp); 600 return (NULL); 601 } 602 603 /* Set the types. */ 604 zhp->zfs_head_type = parent->zfs_head_type; 605 zhp->zfs_type = ZFS_TYPE_BOOKMARK; 606 607 if ((zhp->zpool_hdl = zpool_handle(zhp)) == NULL) { 608 nvlist_free(zhp->zfs_props); 609 free(zhp); 610 return (NULL); 611 } 612 613 return (zhp); 614 } 615 616 /* 617 * Opens the given snapshot, filesystem, or volume. The 'types' 618 * argument is a mask of acceptable types. The function will print an 619 * appropriate error message and return NULL if it can't be opened. 620 */ 621 zfs_handle_t * 622 zfs_open(libzfs_handle_t *hdl, const char *path, int types) 623 { 624 zfs_handle_t *zhp; 625 char errbuf[1024]; 626 627 (void) snprintf(errbuf, sizeof (errbuf), 628 dgettext(TEXT_DOMAIN, "cannot open '%s'"), path); 629 630 /* 631 * Validate the name before we even try to open it. 632 */ 633 if (!zfs_validate_name(hdl, path, ZFS_TYPE_DATASET, B_FALSE)) { 634 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 635 "invalid dataset name")); 636 (void) zfs_error(hdl, EZFS_INVALIDNAME, errbuf); 637 return (NULL); 638 } 639 640 /* 641 * Try to get stats for the dataset, which will tell us if it exists. 642 */ 643 errno = 0; 644 if ((zhp = make_dataset_handle(hdl, path)) == NULL) { 645 (void) zfs_standard_error(hdl, errno, errbuf); 646 return (NULL); 647 } 648 649 if (zhp == NULL) { 650 char *at = strchr(path, '@'); 651 652 if (at != NULL) 653 *at = '\0'; 654 errno = 0; 655 if ((zhp = make_dataset_handle(hdl, path)) == NULL) { 656 (void) zfs_standard_error(hdl, errno, errbuf); 657 return (NULL); 658 } 659 if (at != NULL) 660 *at = '@'; 661 (void) strlcpy(zhp->zfs_name, path, sizeof (zhp->zfs_name)); 662 zhp->zfs_type = ZFS_TYPE_SNAPSHOT; 663 } 664 665 if (!(types & zhp->zfs_type)) { 666 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf); 667 zfs_close(zhp); 668 return (NULL); 669 } 670 671 return (zhp); 672 } 673 674 /* 675 * Release a ZFS handle. Nothing to do but free the associated memory. 676 */ 677 void 678 zfs_close(zfs_handle_t *zhp) 679 { 680 if (zhp->zfs_mntopts) 681 free(zhp->zfs_mntopts); 682 nvlist_free(zhp->zfs_props); 683 nvlist_free(zhp->zfs_user_props); 684 nvlist_free(zhp->zfs_recvd_props); 685 free(zhp); 686 } 687 688 typedef struct mnttab_node { 689 struct mnttab mtn_mt; 690 avl_node_t mtn_node; 691 } mnttab_node_t; 692 693 static int 694 libzfs_mnttab_cache_compare(const void *arg1, const void *arg2) 695 { 696 const mnttab_node_t *mtn1 = arg1; 697 const mnttab_node_t *mtn2 = arg2; 698 int rv; 699 700 rv = strcmp(mtn1->mtn_mt.mnt_special, mtn2->mtn_mt.mnt_special); 701 702 if (rv == 0) 703 return (0); 704 return (rv > 0 ? 1 : -1); 705 } 706 707 void 708 libzfs_mnttab_init(libzfs_handle_t *hdl) 709 { 710 assert(avl_numnodes(&hdl->libzfs_mnttab_cache) == 0); 711 avl_create(&hdl->libzfs_mnttab_cache, libzfs_mnttab_cache_compare, 712 sizeof (mnttab_node_t), offsetof(mnttab_node_t, mtn_node)); 713 } 714 715 void 716 libzfs_mnttab_update(libzfs_handle_t *hdl) 717 { 718 struct mnttab entry; 719 720 rewind(hdl->libzfs_mnttab); 721 while (getmntent(hdl->libzfs_mnttab, &entry) == 0) { 722 mnttab_node_t *mtn; 723 724 if (strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0) 725 continue; 726 mtn = zfs_alloc(hdl, sizeof (mnttab_node_t)); 727 mtn->mtn_mt.mnt_special = zfs_strdup(hdl, entry.mnt_special); 728 mtn->mtn_mt.mnt_mountp = zfs_strdup(hdl, entry.mnt_mountp); 729 mtn->mtn_mt.mnt_fstype = zfs_strdup(hdl, entry.mnt_fstype); 730 mtn->mtn_mt.mnt_mntopts = zfs_strdup(hdl, entry.mnt_mntopts); 731 avl_add(&hdl->libzfs_mnttab_cache, mtn); 732 } 733 } 734 735 void 736 libzfs_mnttab_fini(libzfs_handle_t *hdl) 737 { 738 void *cookie = NULL; 739 mnttab_node_t *mtn; 740 741 while ((mtn = avl_destroy_nodes(&hdl->libzfs_mnttab_cache, &cookie)) 742 != NULL) { 743 free(mtn->mtn_mt.mnt_special); 744 free(mtn->mtn_mt.mnt_mountp); 745 free(mtn->mtn_mt.mnt_fstype); 746 free(mtn->mtn_mt.mnt_mntopts); 747 free(mtn); 748 } 749 avl_destroy(&hdl->libzfs_mnttab_cache); 750 } 751 752 void 753 libzfs_mnttab_cache(libzfs_handle_t *hdl, boolean_t enable) 754 { 755 hdl->libzfs_mnttab_enable = enable; 756 } 757 758 int 759 libzfs_mnttab_find(libzfs_handle_t *hdl, const char *fsname, 760 struct mnttab *entry) 761 { 762 mnttab_node_t find; 763 mnttab_node_t *mtn; 764 765 if (!hdl->libzfs_mnttab_enable) { 766 struct mnttab srch = { 0 }; 767 768 if (avl_numnodes(&hdl->libzfs_mnttab_cache)) 769 libzfs_mnttab_fini(hdl); 770 rewind(hdl->libzfs_mnttab); 771 srch.mnt_special = (char *)fsname; 772 srch.mnt_fstype = MNTTYPE_ZFS; 773 if (getmntany(hdl->libzfs_mnttab, entry, &srch) == 0) 774 return (0); 775 else 776 return (ENOENT); 777 } 778 779 if (avl_numnodes(&hdl->libzfs_mnttab_cache) == 0) 780 libzfs_mnttab_update(hdl); 781 782 find.mtn_mt.mnt_special = (char *)fsname; 783 mtn = avl_find(&hdl->libzfs_mnttab_cache, &find, NULL); 784 if (mtn) { 785 *entry = mtn->mtn_mt; 786 return (0); 787 } 788 return (ENOENT); 789 } 790 791 void 792 libzfs_mnttab_add(libzfs_handle_t *hdl, const char *special, 793 const char *mountp, const char *mntopts) 794 { 795 mnttab_node_t *mtn; 796 797 if (avl_numnodes(&hdl->libzfs_mnttab_cache) == 0) 798 return; 799 mtn = zfs_alloc(hdl, sizeof (mnttab_node_t)); 800 mtn->mtn_mt.mnt_special = zfs_strdup(hdl, special); 801 mtn->mtn_mt.mnt_mountp = zfs_strdup(hdl, mountp); 802 mtn->mtn_mt.mnt_fstype = zfs_strdup(hdl, MNTTYPE_ZFS); 803 mtn->mtn_mt.mnt_mntopts = zfs_strdup(hdl, mntopts); 804 avl_add(&hdl->libzfs_mnttab_cache, mtn); 805 } 806 807 void 808 libzfs_mnttab_remove(libzfs_handle_t *hdl, const char *fsname) 809 { 810 mnttab_node_t find; 811 mnttab_node_t *ret; 812 813 find.mtn_mt.mnt_special = (char *)fsname; 814 if ((ret = avl_find(&hdl->libzfs_mnttab_cache, (void *)&find, NULL)) 815 != NULL) { 816 avl_remove(&hdl->libzfs_mnttab_cache, ret); 817 free(ret->mtn_mt.mnt_special); 818 free(ret->mtn_mt.mnt_mountp); 819 free(ret->mtn_mt.mnt_fstype); 820 free(ret->mtn_mt.mnt_mntopts); 821 free(ret); 822 } 823 } 824 825 int 826 zfs_spa_version(zfs_handle_t *zhp, int *spa_version) 827 { 828 zpool_handle_t *zpool_handle = zhp->zpool_hdl; 829 830 if (zpool_handle == NULL) 831 return (-1); 832 833 *spa_version = zpool_get_prop_int(zpool_handle, 834 ZPOOL_PROP_VERSION, NULL); 835 return (0); 836 } 837 838 /* 839 * The choice of reservation property depends on the SPA version. 840 */ 841 static int 842 zfs_which_resv_prop(zfs_handle_t *zhp, zfs_prop_t *resv_prop) 843 { 844 int spa_version; 845 846 if (zfs_spa_version(zhp, &spa_version) < 0) 847 return (-1); 848 849 if (spa_version >= SPA_VERSION_REFRESERVATION) 850 *resv_prop = ZFS_PROP_REFRESERVATION; 851 else 852 *resv_prop = ZFS_PROP_RESERVATION; 853 854 return (0); 855 } 856 857 /* 858 * Given an nvlist of properties to set, validates that they are correct, and 859 * parses any numeric properties (index, boolean, etc) if they are specified as 860 * strings. 861 */ 862 nvlist_t * 863 zfs_valid_proplist(libzfs_handle_t *hdl, zfs_type_t type, nvlist_t *nvl, 864 uint64_t zoned, zfs_handle_t *zhp, zpool_handle_t *zpool_hdl, 865 const char *errbuf) 866 { 867 nvpair_t *elem; 868 uint64_t intval; 869 char *strval; 870 zfs_prop_t prop; 871 nvlist_t *ret; 872 int chosen_normal = -1; 873 int chosen_utf = -1; 874 875 if (nvlist_alloc(&ret, NV_UNIQUE_NAME, 0) != 0) { 876 (void) no_memory(hdl); 877 return (NULL); 878 } 879 880 /* 881 * Make sure this property is valid and applies to this type. 882 */ 883 884 elem = NULL; 885 while ((elem = nvlist_next_nvpair(nvl, elem)) != NULL) { 886 const char *propname = nvpair_name(elem); 887 888 prop = zfs_name_to_prop(propname); 889 if (prop == ZPROP_INVAL && zfs_prop_user(propname)) { 890 /* 891 * This is a user property: make sure it's a 892 * string, and that it's less than ZAP_MAXNAMELEN. 893 */ 894 if (nvpair_type(elem) != DATA_TYPE_STRING) { 895 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 896 "'%s' must be a string"), propname); 897 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 898 goto error; 899 } 900 901 if (strlen(nvpair_name(elem)) >= ZAP_MAXNAMELEN) { 902 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 903 "property name '%s' is too long"), 904 propname); 905 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 906 goto error; 907 } 908 909 (void) nvpair_value_string(elem, &strval); 910 if (nvlist_add_string(ret, propname, strval) != 0) { 911 (void) no_memory(hdl); 912 goto error; 913 } 914 continue; 915 } 916 917 /* 918 * Currently, only user properties can be modified on 919 * snapshots. 920 */ 921 if (type == ZFS_TYPE_SNAPSHOT) { 922 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 923 "this property can not be modified for snapshots")); 924 (void) zfs_error(hdl, EZFS_PROPTYPE, errbuf); 925 goto error; 926 } 927 928 if (prop == ZPROP_INVAL && zfs_prop_userquota(propname)) { 929 zfs_userquota_prop_t uqtype; 930 char newpropname[128]; 931 char domain[128]; 932 uint64_t rid; 933 uint64_t valary[3]; 934 935 if (userquota_propname_decode(propname, zoned, 936 &uqtype, domain, sizeof (domain), &rid) != 0) { 937 zfs_error_aux(hdl, 938 dgettext(TEXT_DOMAIN, 939 "'%s' has an invalid user/group name"), 940 propname); 941 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 942 goto error; 943 } 944 945 if (uqtype != ZFS_PROP_USERQUOTA && 946 uqtype != ZFS_PROP_GROUPQUOTA) { 947 zfs_error_aux(hdl, 948 dgettext(TEXT_DOMAIN, "'%s' is readonly"), 949 propname); 950 (void) zfs_error(hdl, EZFS_PROPREADONLY, 951 errbuf); 952 goto error; 953 } 954 955 if (nvpair_type(elem) == DATA_TYPE_STRING) { 956 (void) nvpair_value_string(elem, &strval); 957 if (strcmp(strval, "none") == 0) { 958 intval = 0; 959 } else if (zfs_nicestrtonum(hdl, 960 strval, &intval) != 0) { 961 (void) zfs_error(hdl, 962 EZFS_BADPROP, errbuf); 963 goto error; 964 } 965 } else if (nvpair_type(elem) == 966 DATA_TYPE_UINT64) { 967 (void) nvpair_value_uint64(elem, &intval); 968 if (intval == 0) { 969 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 970 "use 'none' to disable " 971 "userquota/groupquota")); 972 goto error; 973 } 974 } else { 975 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 976 "'%s' must be a number"), propname); 977 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 978 goto error; 979 } 980 981 /* 982 * Encode the prop name as 983 * userquota@<hex-rid>-domain, to make it easy 984 * for the kernel to decode. 985 */ 986 (void) snprintf(newpropname, sizeof (newpropname), 987 "%s%llx-%s", zfs_userquota_prop_prefixes[uqtype], 988 (longlong_t)rid, domain); 989 valary[0] = uqtype; 990 valary[1] = rid; 991 valary[2] = intval; 992 if (nvlist_add_uint64_array(ret, newpropname, 993 valary, 3) != 0) { 994 (void) no_memory(hdl); 995 goto error; 996 } 997 continue; 998 } else if (prop == ZPROP_INVAL && zfs_prop_written(propname)) { 999 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1000 "'%s' is readonly"), 1001 propname); 1002 (void) zfs_error(hdl, EZFS_PROPREADONLY, errbuf); 1003 goto error; 1004 } 1005 1006 if (prop == ZPROP_INVAL) { 1007 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1008 "invalid property '%s'"), propname); 1009 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1010 goto error; 1011 } 1012 1013 if (!zfs_prop_valid_for_type(prop, type)) { 1014 zfs_error_aux(hdl, 1015 dgettext(TEXT_DOMAIN, "'%s' does not " 1016 "apply to datasets of this type"), propname); 1017 (void) zfs_error(hdl, EZFS_PROPTYPE, errbuf); 1018 goto error; 1019 } 1020 1021 if (zfs_prop_readonly(prop) && 1022 (!zfs_prop_setonce(prop) || zhp != NULL)) { 1023 zfs_error_aux(hdl, 1024 dgettext(TEXT_DOMAIN, "'%s' is readonly"), 1025 propname); 1026 (void) zfs_error(hdl, EZFS_PROPREADONLY, errbuf); 1027 goto error; 1028 } 1029 1030 if (zprop_parse_value(hdl, elem, prop, type, ret, 1031 &strval, &intval, errbuf) != 0) 1032 goto error; 1033 1034 /* 1035 * Perform some additional checks for specific properties. 1036 */ 1037 switch (prop) { 1038 case ZFS_PROP_VERSION: 1039 { 1040 int version; 1041 1042 if (zhp == NULL) 1043 break; 1044 version = zfs_prop_get_int(zhp, ZFS_PROP_VERSION); 1045 if (intval < version) { 1046 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1047 "Can not downgrade; already at version %u"), 1048 version); 1049 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1050 goto error; 1051 } 1052 break; 1053 } 1054 1055 case ZFS_PROP_VOLBLOCKSIZE: 1056 case ZFS_PROP_RECORDSIZE: 1057 { 1058 int maxbs = SPA_MAXBLOCKSIZE; 1059 if (zpool_hdl != NULL) { 1060 maxbs = zpool_get_prop_int(zpool_hdl, 1061 ZPOOL_PROP_MAXBLOCKSIZE, NULL); 1062 } 1063 /* 1064 * Volumes are limited to a volblocksize of 128KB, 1065 * because they typically service workloads with 1066 * small random writes, which incur a large performance 1067 * penalty with large blocks. 1068 */ 1069 if (prop == ZFS_PROP_VOLBLOCKSIZE) 1070 maxbs = SPA_OLD_MAXBLOCKSIZE; 1071 /* 1072 * The value must be a power of two between 1073 * SPA_MINBLOCKSIZE and maxbs. 1074 */ 1075 if (intval < SPA_MINBLOCKSIZE || 1076 intval > maxbs || !ISP2(intval)) { 1077 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1078 "'%s' must be power of 2 from 512B " 1079 "to %uKB"), propname, maxbs >> 10); 1080 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1081 goto error; 1082 } 1083 break; 1084 } 1085 case ZFS_PROP_MLSLABEL: 1086 { 1087 #ifdef illumos 1088 /* 1089 * Verify the mlslabel string and convert to 1090 * internal hex label string. 1091 */ 1092 1093 m_label_t *new_sl; 1094 char *hex = NULL; /* internal label string */ 1095 1096 /* Default value is already OK. */ 1097 if (strcasecmp(strval, ZFS_MLSLABEL_DEFAULT) == 0) 1098 break; 1099 1100 /* Verify the label can be converted to binary form */ 1101 if (((new_sl = m_label_alloc(MAC_LABEL)) == NULL) || 1102 (str_to_label(strval, &new_sl, MAC_LABEL, 1103 L_NO_CORRECTION, NULL) == -1)) { 1104 goto badlabel; 1105 } 1106 1107 /* Now translate to hex internal label string */ 1108 if (label_to_str(new_sl, &hex, M_INTERNAL, 1109 DEF_NAMES) != 0) { 1110 if (hex) 1111 free(hex); 1112 goto badlabel; 1113 } 1114 m_label_free(new_sl); 1115 1116 /* If string is already in internal form, we're done. */ 1117 if (strcmp(strval, hex) == 0) { 1118 free(hex); 1119 break; 1120 } 1121 1122 /* Replace the label string with the internal form. */ 1123 (void) nvlist_remove(ret, zfs_prop_to_name(prop), 1124 DATA_TYPE_STRING); 1125 verify(nvlist_add_string(ret, zfs_prop_to_name(prop), 1126 hex) == 0); 1127 free(hex); 1128 1129 break; 1130 1131 badlabel: 1132 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1133 "invalid mlslabel '%s'"), strval); 1134 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1135 m_label_free(new_sl); /* OK if null */ 1136 #else /* !illumos */ 1137 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1138 "mlslabel is not supported on FreeBSD")); 1139 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1140 #endif /* illumos */ 1141 goto error; 1142 1143 } 1144 1145 case ZFS_PROP_MOUNTPOINT: 1146 { 1147 namecheck_err_t why; 1148 1149 if (strcmp(strval, ZFS_MOUNTPOINT_NONE) == 0 || 1150 strcmp(strval, ZFS_MOUNTPOINT_LEGACY) == 0) 1151 break; 1152 1153 if (mountpoint_namecheck(strval, &why)) { 1154 switch (why) { 1155 case NAME_ERR_LEADING_SLASH: 1156 zfs_error_aux(hdl, 1157 dgettext(TEXT_DOMAIN, 1158 "'%s' must be an absolute path, " 1159 "'none', or 'legacy'"), propname); 1160 break; 1161 case NAME_ERR_TOOLONG: 1162 zfs_error_aux(hdl, 1163 dgettext(TEXT_DOMAIN, 1164 "component of '%s' is too long"), 1165 propname); 1166 break; 1167 1168 default: 1169 zfs_error_aux(hdl, 1170 dgettext(TEXT_DOMAIN, 1171 "(%d) not defined"), 1172 why); 1173 break; 1174 } 1175 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1176 goto error; 1177 } 1178 } 1179 1180 /*FALLTHRU*/ 1181 1182 case ZFS_PROP_SHARESMB: 1183 case ZFS_PROP_SHARENFS: 1184 /* 1185 * For the mountpoint and sharenfs or sharesmb 1186 * properties, check if it can be set in a 1187 * global/non-global zone based on 1188 * the zoned property value: 1189 * 1190 * global zone non-global zone 1191 * -------------------------------------------------- 1192 * zoned=on mountpoint (no) mountpoint (yes) 1193 * sharenfs (no) sharenfs (no) 1194 * sharesmb (no) sharesmb (no) 1195 * 1196 * zoned=off mountpoint (yes) N/A 1197 * sharenfs (yes) 1198 * sharesmb (yes) 1199 */ 1200 if (zoned) { 1201 if (getzoneid() == GLOBAL_ZONEID) { 1202 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1203 "'%s' cannot be set on " 1204 "dataset in a non-global zone"), 1205 propname); 1206 (void) zfs_error(hdl, EZFS_ZONED, 1207 errbuf); 1208 goto error; 1209 } else if (prop == ZFS_PROP_SHARENFS || 1210 prop == ZFS_PROP_SHARESMB) { 1211 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1212 "'%s' cannot be set in " 1213 "a non-global zone"), propname); 1214 (void) zfs_error(hdl, EZFS_ZONED, 1215 errbuf); 1216 goto error; 1217 } 1218 } else if (getzoneid() != GLOBAL_ZONEID) { 1219 /* 1220 * If zoned property is 'off', this must be in 1221 * a global zone. If not, something is wrong. 1222 */ 1223 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1224 "'%s' cannot be set while dataset " 1225 "'zoned' property is set"), propname); 1226 (void) zfs_error(hdl, EZFS_ZONED, errbuf); 1227 goto error; 1228 } 1229 1230 /* 1231 * At this point, it is legitimate to set the 1232 * property. Now we want to make sure that the 1233 * property value is valid if it is sharenfs. 1234 */ 1235 if ((prop == ZFS_PROP_SHARENFS || 1236 prop == ZFS_PROP_SHARESMB) && 1237 strcmp(strval, "on") != 0 && 1238 strcmp(strval, "off") != 0) { 1239 zfs_share_proto_t proto; 1240 1241 if (prop == ZFS_PROP_SHARESMB) 1242 proto = PROTO_SMB; 1243 else 1244 proto = PROTO_NFS; 1245 1246 /* 1247 * Must be an valid sharing protocol 1248 * option string so init the libshare 1249 * in order to enable the parser and 1250 * then parse the options. We use the 1251 * control API since we don't care about 1252 * the current configuration and don't 1253 * want the overhead of loading it 1254 * until we actually do something. 1255 */ 1256 1257 if (zfs_init_libshare(hdl, 1258 SA_INIT_CONTROL_API) != SA_OK) { 1259 /* 1260 * An error occurred so we can't do 1261 * anything 1262 */ 1263 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1264 "'%s' cannot be set: problem " 1265 "in share initialization"), 1266 propname); 1267 (void) zfs_error(hdl, EZFS_BADPROP, 1268 errbuf); 1269 goto error; 1270 } 1271 1272 if (zfs_parse_options(strval, proto) != SA_OK) { 1273 /* 1274 * There was an error in parsing so 1275 * deal with it by issuing an error 1276 * message and leaving after 1277 * uninitializing the the libshare 1278 * interface. 1279 */ 1280 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1281 "'%s' cannot be set to invalid " 1282 "options"), propname); 1283 (void) zfs_error(hdl, EZFS_BADPROP, 1284 errbuf); 1285 zfs_uninit_libshare(hdl); 1286 goto error; 1287 } 1288 zfs_uninit_libshare(hdl); 1289 } 1290 1291 break; 1292 1293 case ZFS_PROP_UTF8ONLY: 1294 chosen_utf = (int)intval; 1295 break; 1296 1297 case ZFS_PROP_NORMALIZE: 1298 chosen_normal = (int)intval; 1299 break; 1300 1301 default: 1302 break; 1303 } 1304 1305 /* 1306 * For changes to existing volumes, we have some additional 1307 * checks to enforce. 1308 */ 1309 if (type == ZFS_TYPE_VOLUME && zhp != NULL) { 1310 uint64_t volsize = zfs_prop_get_int(zhp, 1311 ZFS_PROP_VOLSIZE); 1312 uint64_t blocksize = zfs_prop_get_int(zhp, 1313 ZFS_PROP_VOLBLOCKSIZE); 1314 char buf[64]; 1315 1316 switch (prop) { 1317 case ZFS_PROP_RESERVATION: 1318 case ZFS_PROP_REFRESERVATION: 1319 if (intval > volsize) { 1320 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1321 "'%s' is greater than current " 1322 "volume size"), propname); 1323 (void) zfs_error(hdl, EZFS_BADPROP, 1324 errbuf); 1325 goto error; 1326 } 1327 break; 1328 1329 case ZFS_PROP_VOLSIZE: 1330 if (intval % blocksize != 0) { 1331 zfs_nicenum(blocksize, buf, 1332 sizeof (buf)); 1333 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1334 "'%s' must be a multiple of " 1335 "volume block size (%s)"), 1336 propname, buf); 1337 (void) zfs_error(hdl, EZFS_BADPROP, 1338 errbuf); 1339 goto error; 1340 } 1341 1342 if (intval == 0) { 1343 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1344 "'%s' cannot be zero"), 1345 propname); 1346 (void) zfs_error(hdl, EZFS_BADPROP, 1347 errbuf); 1348 goto error; 1349 } 1350 break; 1351 1352 default: 1353 break; 1354 } 1355 } 1356 } 1357 1358 /* 1359 * If normalization was chosen, but no UTF8 choice was made, 1360 * enforce rejection of non-UTF8 names. 1361 * 1362 * If normalization was chosen, but rejecting non-UTF8 names 1363 * was explicitly not chosen, it is an error. 1364 */ 1365 if (chosen_normal > 0 && chosen_utf < 0) { 1366 if (nvlist_add_uint64(ret, 1367 zfs_prop_to_name(ZFS_PROP_UTF8ONLY), 1) != 0) { 1368 (void) no_memory(hdl); 1369 goto error; 1370 } 1371 } else if (chosen_normal > 0 && chosen_utf == 0) { 1372 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1373 "'%s' must be set 'on' if normalization chosen"), 1374 zfs_prop_to_name(ZFS_PROP_UTF8ONLY)); 1375 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1376 goto error; 1377 } 1378 return (ret); 1379 1380 error: 1381 nvlist_free(ret); 1382 return (NULL); 1383 } 1384 1385 int 1386 zfs_add_synthetic_resv(zfs_handle_t *zhp, nvlist_t *nvl) 1387 { 1388 uint64_t old_volsize; 1389 uint64_t new_volsize; 1390 uint64_t old_reservation; 1391 uint64_t new_reservation; 1392 zfs_prop_t resv_prop; 1393 nvlist_t *props; 1394 1395 /* 1396 * If this is an existing volume, and someone is setting the volsize, 1397 * make sure that it matches the reservation, or add it if necessary. 1398 */ 1399 old_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE); 1400 if (zfs_which_resv_prop(zhp, &resv_prop) < 0) 1401 return (-1); 1402 old_reservation = zfs_prop_get_int(zhp, resv_prop); 1403 1404 props = fnvlist_alloc(); 1405 fnvlist_add_uint64(props, zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE), 1406 zfs_prop_get_int(zhp, ZFS_PROP_VOLBLOCKSIZE)); 1407 1408 if ((zvol_volsize_to_reservation(old_volsize, props) != 1409 old_reservation) || nvlist_exists(nvl, 1410 zfs_prop_to_name(resv_prop))) { 1411 fnvlist_free(props); 1412 return (0); 1413 } 1414 if (nvlist_lookup_uint64(nvl, zfs_prop_to_name(ZFS_PROP_VOLSIZE), 1415 &new_volsize) != 0) { 1416 fnvlist_free(props); 1417 return (-1); 1418 } 1419 new_reservation = zvol_volsize_to_reservation(new_volsize, props); 1420 fnvlist_free(props); 1421 1422 if (nvlist_add_uint64(nvl, zfs_prop_to_name(resv_prop), 1423 new_reservation) != 0) { 1424 (void) no_memory(zhp->zfs_hdl); 1425 return (-1); 1426 } 1427 return (1); 1428 } 1429 1430 void 1431 zfs_setprop_error(libzfs_handle_t *hdl, zfs_prop_t prop, int err, 1432 char *errbuf) 1433 { 1434 switch (err) { 1435 1436 case ENOSPC: 1437 /* 1438 * For quotas and reservations, ENOSPC indicates 1439 * something different; setting a quota or reservation 1440 * doesn't use any disk space. 1441 */ 1442 switch (prop) { 1443 case ZFS_PROP_QUOTA: 1444 case ZFS_PROP_REFQUOTA: 1445 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1446 "size is less than current used or " 1447 "reserved space")); 1448 (void) zfs_error(hdl, EZFS_PROPSPACE, errbuf); 1449 break; 1450 1451 case ZFS_PROP_RESERVATION: 1452 case ZFS_PROP_REFRESERVATION: 1453 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1454 "size is greater than available space")); 1455 (void) zfs_error(hdl, EZFS_PROPSPACE, errbuf); 1456 break; 1457 1458 default: 1459 (void) zfs_standard_error(hdl, err, errbuf); 1460 break; 1461 } 1462 break; 1463 1464 case EBUSY: 1465 (void) zfs_standard_error(hdl, EBUSY, errbuf); 1466 break; 1467 1468 case EROFS: 1469 (void) zfs_error(hdl, EZFS_DSREADONLY, errbuf); 1470 break; 1471 1472 case E2BIG: 1473 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1474 "property value too long")); 1475 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1476 break; 1477 1478 case ENOTSUP: 1479 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1480 "pool and or dataset must be upgraded to set this " 1481 "property or value")); 1482 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf); 1483 break; 1484 1485 case ERANGE: 1486 case EDOM: 1487 if (prop == ZFS_PROP_COMPRESSION || 1488 prop == ZFS_PROP_RECORDSIZE) { 1489 (void) zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1490 "property setting is not allowed on " 1491 "bootable datasets")); 1492 (void) zfs_error(hdl, EZFS_NOTSUP, errbuf); 1493 } else if (prop == ZFS_PROP_CHECKSUM || 1494 prop == ZFS_PROP_DEDUP) { 1495 (void) zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1496 "property setting is not allowed on " 1497 "root pools")); 1498 (void) zfs_error(hdl, EZFS_NOTSUP, errbuf); 1499 } else { 1500 (void) zfs_standard_error(hdl, err, errbuf); 1501 } 1502 break; 1503 1504 case EINVAL: 1505 if (prop == ZPROP_INVAL) { 1506 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1507 } else { 1508 (void) zfs_standard_error(hdl, err, errbuf); 1509 } 1510 break; 1511 1512 case EOVERFLOW: 1513 /* 1514 * This platform can't address a volume this big. 1515 */ 1516 #ifdef _ILP32 1517 if (prop == ZFS_PROP_VOLSIZE) { 1518 (void) zfs_error(hdl, EZFS_VOLTOOBIG, errbuf); 1519 break; 1520 } 1521 #endif 1522 /* FALLTHROUGH */ 1523 default: 1524 (void) zfs_standard_error(hdl, err, errbuf); 1525 } 1526 } 1527 1528 /* 1529 * Given a property name and value, set the property for the given dataset. 1530 */ 1531 int 1532 zfs_prop_set(zfs_handle_t *zhp, const char *propname, const char *propval) 1533 { 1534 int ret = -1; 1535 char errbuf[1024]; 1536 libzfs_handle_t *hdl = zhp->zfs_hdl; 1537 nvlist_t *nvl = NULL; 1538 1539 (void) snprintf(errbuf, sizeof (errbuf), 1540 dgettext(TEXT_DOMAIN, "cannot set property for '%s'"), 1541 zhp->zfs_name); 1542 1543 if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0 || 1544 nvlist_add_string(nvl, propname, propval) != 0) { 1545 (void) no_memory(hdl); 1546 goto error; 1547 } 1548 1549 ret = zfs_prop_set_list(zhp, nvl); 1550 1551 error: 1552 nvlist_free(nvl); 1553 return (ret); 1554 } 1555 1556 1557 1558 /* 1559 * Given an nvlist of property names and values, set the properties for the 1560 * given dataset. 1561 */ 1562 int 1563 zfs_prop_set_list(zfs_handle_t *zhp, nvlist_t *props) 1564 { 1565 zfs_cmd_t zc = { 0 }; 1566 int ret = -1; 1567 prop_changelist_t **cls = NULL; 1568 int cl_idx; 1569 char errbuf[1024]; 1570 libzfs_handle_t *hdl = zhp->zfs_hdl; 1571 nvlist_t *nvl; 1572 int nvl_len; 1573 int added_resv = 0; 1574 1575 (void) snprintf(errbuf, sizeof (errbuf), 1576 dgettext(TEXT_DOMAIN, "cannot set property for '%s'"), 1577 zhp->zfs_name); 1578 1579 if ((nvl = zfs_valid_proplist(hdl, zhp->zfs_type, props, 1580 zfs_prop_get_int(zhp, ZFS_PROP_ZONED), zhp, zhp->zpool_hdl, 1581 errbuf)) == NULL) 1582 goto error; 1583 1584 /* 1585 * We have to check for any extra properties which need to be added 1586 * before computing the length of the nvlist. 1587 */ 1588 for (nvpair_t *elem = nvlist_next_nvpair(nvl, NULL); 1589 elem != NULL; 1590 elem = nvlist_next_nvpair(nvl, elem)) { 1591 if (zfs_name_to_prop(nvpair_name(elem)) == ZFS_PROP_VOLSIZE && 1592 (added_resv = zfs_add_synthetic_resv(zhp, nvl)) == -1) { 1593 goto error; 1594 } 1595 } 1596 /* 1597 * Check how many properties we're setting and allocate an array to 1598 * store changelist pointers for postfix(). 1599 */ 1600 nvl_len = 0; 1601 for (nvpair_t *elem = nvlist_next_nvpair(nvl, NULL); 1602 elem != NULL; 1603 elem = nvlist_next_nvpair(nvl, elem)) 1604 nvl_len++; 1605 if ((cls = calloc(nvl_len, sizeof (prop_changelist_t *))) == NULL) 1606 goto error; 1607 1608 cl_idx = 0; 1609 for (nvpair_t *elem = nvlist_next_nvpair(nvl, NULL); 1610 elem != NULL; 1611 elem = nvlist_next_nvpair(nvl, elem)) { 1612 1613 zfs_prop_t prop = zfs_name_to_prop(nvpair_name(elem)); 1614 1615 assert(cl_idx < nvl_len); 1616 /* 1617 * We don't want to unmount & remount the dataset when changing 1618 * its canmount property to 'on' or 'noauto'. We only use 1619 * the changelist logic to unmount when setting canmount=off. 1620 */ 1621 if (prop != ZFS_PROP_CANMOUNT || 1622 (fnvpair_value_uint64(elem) == ZFS_CANMOUNT_OFF && 1623 zfs_is_mounted(zhp, NULL))) { 1624 cls[cl_idx] = changelist_gather(zhp, prop, 0, 0); 1625 if (cls[cl_idx] == NULL) 1626 goto error; 1627 } 1628 1629 if (prop == ZFS_PROP_MOUNTPOINT && 1630 changelist_haszonedchild(cls[cl_idx])) { 1631 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1632 "child dataset with inherited mountpoint is used " 1633 "in a non-global zone")); 1634 ret = zfs_error(hdl, EZFS_ZONED, errbuf); 1635 goto error; 1636 } 1637 1638 /* We don't support those properties on FreeBSD. */ 1639 switch (prop) { 1640 case ZFS_PROP_DEVICES: 1641 case ZFS_PROP_ISCSIOPTIONS: 1642 case ZFS_PROP_XATTR: 1643 case ZFS_PROP_VSCAN: 1644 case ZFS_PROP_NBMAND: 1645 case ZFS_PROP_MLSLABEL: 1646 (void) snprintf(errbuf, sizeof (errbuf), 1647 "property '%s' not supported on FreeBSD", 1648 nvpair_name(elem)); 1649 ret = zfs_error(hdl, EZFS_PERM, errbuf); 1650 goto error; 1651 } 1652 1653 if (cls[cl_idx] != NULL && 1654 (ret = changelist_prefix(cls[cl_idx])) != 0) 1655 goto error; 1656 1657 cl_idx++; 1658 } 1659 assert(cl_idx == nvl_len); 1660 1661 /* 1662 * Execute the corresponding ioctl() to set this list of properties. 1663 */ 1664 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 1665 1666 if ((ret = zcmd_write_src_nvlist(hdl, &zc, nvl)) != 0 || 1667 (ret = zcmd_alloc_dst_nvlist(hdl, &zc, 0)) != 0) 1668 goto error; 1669 1670 ret = zfs_ioctl(hdl, ZFS_IOC_SET_PROP, &zc); 1671 1672 if (ret != 0) { 1673 /* Get the list of unset properties back and report them. */ 1674 nvlist_t *errorprops = NULL; 1675 if (zcmd_read_dst_nvlist(hdl, &zc, &errorprops) != 0) 1676 goto error; 1677 for (nvpair_t *elem = nvlist_next_nvpair(nvl, NULL); 1678 elem != NULL; 1679 elem = nvlist_next_nvpair(nvl, elem)) { 1680 zfs_prop_t prop = zfs_name_to_prop(nvpair_name(elem)); 1681 zfs_setprop_error(hdl, prop, errno, errbuf); 1682 } 1683 nvlist_free(errorprops); 1684 1685 if (added_resv && errno == ENOSPC) { 1686 /* clean up the volsize property we tried to set */ 1687 uint64_t old_volsize = zfs_prop_get_int(zhp, 1688 ZFS_PROP_VOLSIZE); 1689 nvlist_free(nvl); 1690 nvl = NULL; 1691 zcmd_free_nvlists(&zc); 1692 1693 if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0) 1694 goto error; 1695 if (nvlist_add_uint64(nvl, 1696 zfs_prop_to_name(ZFS_PROP_VOLSIZE), 1697 old_volsize) != 0) 1698 goto error; 1699 if (zcmd_write_src_nvlist(hdl, &zc, nvl) != 0) 1700 goto error; 1701 (void) zfs_ioctl(hdl, ZFS_IOC_SET_PROP, &zc); 1702 } 1703 } else { 1704 for (cl_idx = 0; cl_idx < nvl_len; cl_idx++) { 1705 if (cls[cl_idx] != NULL) { 1706 int clp_err = changelist_postfix(cls[cl_idx]); 1707 if (clp_err != 0) 1708 ret = clp_err; 1709 } 1710 } 1711 1712 /* 1713 * Refresh the statistics so the new property value 1714 * is reflected. 1715 */ 1716 if (ret == 0) 1717 (void) get_stats(zhp); 1718 } 1719 1720 error: 1721 nvlist_free(nvl); 1722 zcmd_free_nvlists(&zc); 1723 if (cls != NULL) { 1724 for (cl_idx = 0; cl_idx < nvl_len; cl_idx++) { 1725 if (cls[cl_idx] != NULL) 1726 changelist_free(cls[cl_idx]); 1727 } 1728 free(cls); 1729 } 1730 return (ret); 1731 } 1732 1733 /* 1734 * Given a property, inherit the value from the parent dataset, or if received 1735 * is TRUE, revert to the received value, if any. 1736 */ 1737 int 1738 zfs_prop_inherit(zfs_handle_t *zhp, const char *propname, boolean_t received) 1739 { 1740 zfs_cmd_t zc = { 0 }; 1741 int ret; 1742 prop_changelist_t *cl; 1743 libzfs_handle_t *hdl = zhp->zfs_hdl; 1744 char errbuf[1024]; 1745 zfs_prop_t prop; 1746 1747 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 1748 "cannot inherit %s for '%s'"), propname, zhp->zfs_name); 1749 1750 zc.zc_cookie = received; 1751 if ((prop = zfs_name_to_prop(propname)) == ZPROP_INVAL) { 1752 /* 1753 * For user properties, the amount of work we have to do is very 1754 * small, so just do it here. 1755 */ 1756 if (!zfs_prop_user(propname)) { 1757 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1758 "invalid property")); 1759 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 1760 } 1761 1762 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 1763 (void) strlcpy(zc.zc_value, propname, sizeof (zc.zc_value)); 1764 1765 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_INHERIT_PROP, &zc) != 0) 1766 return (zfs_standard_error(hdl, errno, errbuf)); 1767 1768 return (0); 1769 } 1770 1771 /* 1772 * Verify that this property is inheritable. 1773 */ 1774 if (zfs_prop_readonly(prop)) 1775 return (zfs_error(hdl, EZFS_PROPREADONLY, errbuf)); 1776 1777 if (!zfs_prop_inheritable(prop) && !received) 1778 return (zfs_error(hdl, EZFS_PROPNONINHERIT, errbuf)); 1779 1780 /* 1781 * Check to see if the value applies to this type 1782 */ 1783 if (!zfs_prop_valid_for_type(prop, zhp->zfs_type)) 1784 return (zfs_error(hdl, EZFS_PROPTYPE, errbuf)); 1785 1786 /* 1787 * Normalize the name, to get rid of shorthand abbreviations. 1788 */ 1789 propname = zfs_prop_to_name(prop); 1790 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 1791 (void) strlcpy(zc.zc_value, propname, sizeof (zc.zc_value)); 1792 1793 if (prop == ZFS_PROP_MOUNTPOINT && getzoneid() == GLOBAL_ZONEID && 1794 zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) { 1795 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1796 "dataset is used in a non-global zone")); 1797 return (zfs_error(hdl, EZFS_ZONED, errbuf)); 1798 } 1799 1800 /* 1801 * Determine datasets which will be affected by this change, if any. 1802 */ 1803 if ((cl = changelist_gather(zhp, prop, 0, 0)) == NULL) 1804 return (-1); 1805 1806 if (prop == ZFS_PROP_MOUNTPOINT && changelist_haszonedchild(cl)) { 1807 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1808 "child dataset with inherited mountpoint is used " 1809 "in a non-global zone")); 1810 ret = zfs_error(hdl, EZFS_ZONED, errbuf); 1811 goto error; 1812 } 1813 1814 if ((ret = changelist_prefix(cl)) != 0) 1815 goto error; 1816 1817 if ((ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_INHERIT_PROP, &zc)) != 0) { 1818 return (zfs_standard_error(hdl, errno, errbuf)); 1819 } else { 1820 1821 if ((ret = changelist_postfix(cl)) != 0) 1822 goto error; 1823 1824 /* 1825 * Refresh the statistics so the new property is reflected. 1826 */ 1827 (void) get_stats(zhp); 1828 } 1829 1830 error: 1831 changelist_free(cl); 1832 return (ret); 1833 } 1834 1835 /* 1836 * True DSL properties are stored in an nvlist. The following two functions 1837 * extract them appropriately. 1838 */ 1839 static uint64_t 1840 getprop_uint64(zfs_handle_t *zhp, zfs_prop_t prop, char **source) 1841 { 1842 nvlist_t *nv; 1843 uint64_t value; 1844 1845 *source = NULL; 1846 if (nvlist_lookup_nvlist(zhp->zfs_props, 1847 zfs_prop_to_name(prop), &nv) == 0) { 1848 verify(nvlist_lookup_uint64(nv, ZPROP_VALUE, &value) == 0); 1849 (void) nvlist_lookup_string(nv, ZPROP_SOURCE, source); 1850 } else { 1851 verify(!zhp->zfs_props_table || 1852 zhp->zfs_props_table[prop] == B_TRUE); 1853 value = zfs_prop_default_numeric(prop); 1854 *source = ""; 1855 } 1856 1857 return (value); 1858 } 1859 1860 static const char * 1861 getprop_string(zfs_handle_t *zhp, zfs_prop_t prop, char **source) 1862 { 1863 nvlist_t *nv; 1864 const char *value; 1865 1866 *source = NULL; 1867 if (nvlist_lookup_nvlist(zhp->zfs_props, 1868 zfs_prop_to_name(prop), &nv) == 0) { 1869 value = fnvlist_lookup_string(nv, ZPROP_VALUE); 1870 (void) nvlist_lookup_string(nv, ZPROP_SOURCE, source); 1871 } else { 1872 verify(!zhp->zfs_props_table || 1873 zhp->zfs_props_table[prop] == B_TRUE); 1874 value = zfs_prop_default_string(prop); 1875 *source = ""; 1876 } 1877 1878 return (value); 1879 } 1880 1881 static boolean_t 1882 zfs_is_recvd_props_mode(zfs_handle_t *zhp) 1883 { 1884 return (zhp->zfs_props == zhp->zfs_recvd_props); 1885 } 1886 1887 static void 1888 zfs_set_recvd_props_mode(zfs_handle_t *zhp, uint64_t *cookie) 1889 { 1890 *cookie = (uint64_t)(uintptr_t)zhp->zfs_props; 1891 zhp->zfs_props = zhp->zfs_recvd_props; 1892 } 1893 1894 static void 1895 zfs_unset_recvd_props_mode(zfs_handle_t *zhp, uint64_t *cookie) 1896 { 1897 zhp->zfs_props = (nvlist_t *)(uintptr_t)*cookie; 1898 *cookie = 0; 1899 } 1900 1901 /* 1902 * Internal function for getting a numeric property. Both zfs_prop_get() and 1903 * zfs_prop_get_int() are built using this interface. 1904 * 1905 * Certain properties can be overridden using 'mount -o'. In this case, scan 1906 * the contents of the /etc/mnttab entry, searching for the appropriate options. 1907 * If they differ from the on-disk values, report the current values and mark 1908 * the source "temporary". 1909 */ 1910 static int 1911 get_numeric_property(zfs_handle_t *zhp, zfs_prop_t prop, zprop_source_t *src, 1912 char **source, uint64_t *val) 1913 { 1914 zfs_cmd_t zc = { 0 }; 1915 nvlist_t *zplprops = NULL; 1916 struct mnttab mnt; 1917 char *mntopt_on = NULL; 1918 char *mntopt_off = NULL; 1919 boolean_t received = zfs_is_recvd_props_mode(zhp); 1920 1921 *source = NULL; 1922 1923 switch (prop) { 1924 case ZFS_PROP_ATIME: 1925 mntopt_on = MNTOPT_ATIME; 1926 mntopt_off = MNTOPT_NOATIME; 1927 break; 1928 1929 case ZFS_PROP_DEVICES: 1930 mntopt_on = MNTOPT_DEVICES; 1931 mntopt_off = MNTOPT_NODEVICES; 1932 break; 1933 1934 case ZFS_PROP_EXEC: 1935 mntopt_on = MNTOPT_EXEC; 1936 mntopt_off = MNTOPT_NOEXEC; 1937 break; 1938 1939 case ZFS_PROP_READONLY: 1940 mntopt_on = MNTOPT_RO; 1941 mntopt_off = MNTOPT_RW; 1942 break; 1943 1944 case ZFS_PROP_SETUID: 1945 mntopt_on = MNTOPT_SETUID; 1946 mntopt_off = MNTOPT_NOSETUID; 1947 break; 1948 1949 case ZFS_PROP_XATTR: 1950 mntopt_on = MNTOPT_XATTR; 1951 mntopt_off = MNTOPT_NOXATTR; 1952 break; 1953 1954 case ZFS_PROP_NBMAND: 1955 mntopt_on = MNTOPT_NBMAND; 1956 mntopt_off = MNTOPT_NONBMAND; 1957 break; 1958 1959 default: 1960 break; 1961 } 1962 1963 /* 1964 * Because looking up the mount options is potentially expensive 1965 * (iterating over all of /etc/mnttab), we defer its calculation until 1966 * we're looking up a property which requires its presence. 1967 */ 1968 if (!zhp->zfs_mntcheck && 1969 (mntopt_on != NULL || prop == ZFS_PROP_MOUNTED)) { 1970 libzfs_handle_t *hdl = zhp->zfs_hdl; 1971 struct mnttab entry; 1972 1973 if (libzfs_mnttab_find(hdl, zhp->zfs_name, &entry) == 0) { 1974 zhp->zfs_mntopts = zfs_strdup(hdl, 1975 entry.mnt_mntopts); 1976 if (zhp->zfs_mntopts == NULL) 1977 return (-1); 1978 } 1979 1980 zhp->zfs_mntcheck = B_TRUE; 1981 } 1982 1983 if (zhp->zfs_mntopts == NULL) 1984 mnt.mnt_mntopts = ""; 1985 else 1986 mnt.mnt_mntopts = zhp->zfs_mntopts; 1987 1988 switch (prop) { 1989 case ZFS_PROP_ATIME: 1990 case ZFS_PROP_DEVICES: 1991 case ZFS_PROP_EXEC: 1992 case ZFS_PROP_READONLY: 1993 case ZFS_PROP_SETUID: 1994 case ZFS_PROP_XATTR: 1995 case ZFS_PROP_NBMAND: 1996 *val = getprop_uint64(zhp, prop, source); 1997 1998 if (received) 1999 break; 2000 2001 if (hasmntopt(&mnt, mntopt_on) && !*val) { 2002 *val = B_TRUE; 2003 if (src) 2004 *src = ZPROP_SRC_TEMPORARY; 2005 } else if (hasmntopt(&mnt, mntopt_off) && *val) { 2006 *val = B_FALSE; 2007 if (src) 2008 *src = ZPROP_SRC_TEMPORARY; 2009 } 2010 break; 2011 2012 case ZFS_PROP_CANMOUNT: 2013 case ZFS_PROP_VOLSIZE: 2014 case ZFS_PROP_QUOTA: 2015 case ZFS_PROP_REFQUOTA: 2016 case ZFS_PROP_RESERVATION: 2017 case ZFS_PROP_REFRESERVATION: 2018 case ZFS_PROP_FILESYSTEM_LIMIT: 2019 case ZFS_PROP_SNAPSHOT_LIMIT: 2020 case ZFS_PROP_FILESYSTEM_COUNT: 2021 case ZFS_PROP_SNAPSHOT_COUNT: 2022 *val = getprop_uint64(zhp, prop, source); 2023 2024 if (*source == NULL) { 2025 /* not default, must be local */ 2026 *source = zhp->zfs_name; 2027 } 2028 break; 2029 2030 case ZFS_PROP_MOUNTED: 2031 *val = (zhp->zfs_mntopts != NULL); 2032 break; 2033 2034 case ZFS_PROP_NUMCLONES: 2035 *val = zhp->zfs_dmustats.dds_num_clones; 2036 break; 2037 2038 case ZFS_PROP_VERSION: 2039 case ZFS_PROP_NORMALIZE: 2040 case ZFS_PROP_UTF8ONLY: 2041 case ZFS_PROP_CASE: 2042 if (!zfs_prop_valid_for_type(prop, zhp->zfs_head_type) || 2043 zcmd_alloc_dst_nvlist(zhp->zfs_hdl, &zc, 0) != 0) 2044 return (-1); 2045 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 2046 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_OBJSET_ZPLPROPS, &zc)) { 2047 zcmd_free_nvlists(&zc); 2048 return (-1); 2049 } 2050 if (zcmd_read_dst_nvlist(zhp->zfs_hdl, &zc, &zplprops) != 0 || 2051 nvlist_lookup_uint64(zplprops, zfs_prop_to_name(prop), 2052 val) != 0) { 2053 zcmd_free_nvlists(&zc); 2054 return (-1); 2055 } 2056 nvlist_free(zplprops); 2057 zcmd_free_nvlists(&zc); 2058 break; 2059 2060 case ZFS_PROP_INCONSISTENT: 2061 *val = zhp->zfs_dmustats.dds_inconsistent; 2062 break; 2063 2064 default: 2065 switch (zfs_prop_get_type(prop)) { 2066 case PROP_TYPE_NUMBER: 2067 case PROP_TYPE_INDEX: 2068 *val = getprop_uint64(zhp, prop, source); 2069 /* 2070 * If we tried to use a default value for a 2071 * readonly property, it means that it was not 2072 * present. 2073 */ 2074 if (zfs_prop_readonly(prop) && 2075 *source != NULL && (*source)[0] == '\0') { 2076 *source = NULL; 2077 } 2078 break; 2079 2080 case PROP_TYPE_STRING: 2081 default: 2082 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN, 2083 "cannot get non-numeric property")); 2084 return (zfs_error(zhp->zfs_hdl, EZFS_BADPROP, 2085 dgettext(TEXT_DOMAIN, "internal error"))); 2086 } 2087 } 2088 2089 return (0); 2090 } 2091 2092 /* 2093 * Calculate the source type, given the raw source string. 2094 */ 2095 static void 2096 get_source(zfs_handle_t *zhp, zprop_source_t *srctype, char *source, 2097 char *statbuf, size_t statlen) 2098 { 2099 if (statbuf == NULL || *srctype == ZPROP_SRC_TEMPORARY) 2100 return; 2101 2102 if (source == NULL) { 2103 *srctype = ZPROP_SRC_NONE; 2104 } else if (source[0] == '\0') { 2105 *srctype = ZPROP_SRC_DEFAULT; 2106 } else if (strstr(source, ZPROP_SOURCE_VAL_RECVD) != NULL) { 2107 *srctype = ZPROP_SRC_RECEIVED; 2108 } else { 2109 if (strcmp(source, zhp->zfs_name) == 0) { 2110 *srctype = ZPROP_SRC_LOCAL; 2111 } else { 2112 (void) strlcpy(statbuf, source, statlen); 2113 *srctype = ZPROP_SRC_INHERITED; 2114 } 2115 } 2116 2117 } 2118 2119 int 2120 zfs_prop_get_recvd(zfs_handle_t *zhp, const char *propname, char *propbuf, 2121 size_t proplen, boolean_t literal) 2122 { 2123 zfs_prop_t prop; 2124 int err = 0; 2125 2126 if (zhp->zfs_recvd_props == NULL) 2127 if (get_recvd_props_ioctl(zhp) != 0) 2128 return (-1); 2129 2130 prop = zfs_name_to_prop(propname); 2131 2132 if (prop != ZPROP_INVAL) { 2133 uint64_t cookie; 2134 if (!nvlist_exists(zhp->zfs_recvd_props, propname)) 2135 return (-1); 2136 zfs_set_recvd_props_mode(zhp, &cookie); 2137 err = zfs_prop_get(zhp, prop, propbuf, proplen, 2138 NULL, NULL, 0, literal); 2139 zfs_unset_recvd_props_mode(zhp, &cookie); 2140 } else { 2141 nvlist_t *propval; 2142 char *recvdval; 2143 if (nvlist_lookup_nvlist(zhp->zfs_recvd_props, 2144 propname, &propval) != 0) 2145 return (-1); 2146 verify(nvlist_lookup_string(propval, ZPROP_VALUE, 2147 &recvdval) == 0); 2148 (void) strlcpy(propbuf, recvdval, proplen); 2149 } 2150 2151 return (err == 0 ? 0 : -1); 2152 } 2153 2154 static int 2155 get_clones_string(zfs_handle_t *zhp, char *propbuf, size_t proplen) 2156 { 2157 nvlist_t *value; 2158 nvpair_t *pair; 2159 2160 value = zfs_get_clones_nvl(zhp); 2161 if (value == NULL) 2162 return (-1); 2163 2164 propbuf[0] = '\0'; 2165 for (pair = nvlist_next_nvpair(value, NULL); pair != NULL; 2166 pair = nvlist_next_nvpair(value, pair)) { 2167 if (propbuf[0] != '\0') 2168 (void) strlcat(propbuf, ",", proplen); 2169 (void) strlcat(propbuf, nvpair_name(pair), proplen); 2170 } 2171 2172 return (0); 2173 } 2174 2175 struct get_clones_arg { 2176 uint64_t numclones; 2177 nvlist_t *value; 2178 const char *origin; 2179 char buf[ZFS_MAX_DATASET_NAME_LEN]; 2180 }; 2181 2182 int 2183 get_clones_cb(zfs_handle_t *zhp, void *arg) 2184 { 2185 struct get_clones_arg *gca = arg; 2186 2187 if (gca->numclones == 0) { 2188 zfs_close(zhp); 2189 return (0); 2190 } 2191 2192 if (zfs_prop_get(zhp, ZFS_PROP_ORIGIN, gca->buf, sizeof (gca->buf), 2193 NULL, NULL, 0, B_TRUE) != 0) 2194 goto out; 2195 if (strcmp(gca->buf, gca->origin) == 0) { 2196 fnvlist_add_boolean(gca->value, zfs_get_name(zhp)); 2197 gca->numclones--; 2198 } 2199 2200 out: 2201 (void) zfs_iter_children(zhp, get_clones_cb, gca); 2202 zfs_close(zhp); 2203 return (0); 2204 } 2205 2206 nvlist_t * 2207 zfs_get_clones_nvl(zfs_handle_t *zhp) 2208 { 2209 nvlist_t *nv, *value; 2210 2211 if (nvlist_lookup_nvlist(zhp->zfs_props, 2212 zfs_prop_to_name(ZFS_PROP_CLONES), &nv) != 0) { 2213 struct get_clones_arg gca; 2214 2215 /* 2216 * if this is a snapshot, then the kernel wasn't able 2217 * to get the clones. Do it by slowly iterating. 2218 */ 2219 if (zhp->zfs_type != ZFS_TYPE_SNAPSHOT) 2220 return (NULL); 2221 if (nvlist_alloc(&nv, NV_UNIQUE_NAME, 0) != 0) 2222 return (NULL); 2223 if (nvlist_alloc(&value, NV_UNIQUE_NAME, 0) != 0) { 2224 nvlist_free(nv); 2225 return (NULL); 2226 } 2227 2228 gca.numclones = zfs_prop_get_int(zhp, ZFS_PROP_NUMCLONES); 2229 gca.value = value; 2230 gca.origin = zhp->zfs_name; 2231 2232 if (gca.numclones != 0) { 2233 zfs_handle_t *root; 2234 char pool[ZFS_MAX_DATASET_NAME_LEN]; 2235 char *cp = pool; 2236 2237 /* get the pool name */ 2238 (void) strlcpy(pool, zhp->zfs_name, sizeof (pool)); 2239 (void) strsep(&cp, "/@"); 2240 root = zfs_open(zhp->zfs_hdl, pool, 2241 ZFS_TYPE_FILESYSTEM); 2242 2243 (void) get_clones_cb(root, &gca); 2244 } 2245 2246 if (gca.numclones != 0 || 2247 nvlist_add_nvlist(nv, ZPROP_VALUE, value) != 0 || 2248 nvlist_add_nvlist(zhp->zfs_props, 2249 zfs_prop_to_name(ZFS_PROP_CLONES), nv) != 0) { 2250 nvlist_free(nv); 2251 nvlist_free(value); 2252 return (NULL); 2253 } 2254 nvlist_free(nv); 2255 nvlist_free(value); 2256 verify(0 == nvlist_lookup_nvlist(zhp->zfs_props, 2257 zfs_prop_to_name(ZFS_PROP_CLONES), &nv)); 2258 } 2259 2260 verify(nvlist_lookup_nvlist(nv, ZPROP_VALUE, &value) == 0); 2261 2262 return (value); 2263 } 2264 2265 /* 2266 * Retrieve a property from the given object. If 'literal' is specified, then 2267 * numbers are left as exact values. Otherwise, numbers are converted to a 2268 * human-readable form. 2269 * 2270 * Returns 0 on success, or -1 on error. 2271 */ 2272 int 2273 zfs_prop_get(zfs_handle_t *zhp, zfs_prop_t prop, char *propbuf, size_t proplen, 2274 zprop_source_t *src, char *statbuf, size_t statlen, boolean_t literal) 2275 { 2276 char *source = NULL; 2277 uint64_t val; 2278 const char *str; 2279 const char *strval; 2280 boolean_t received = zfs_is_recvd_props_mode(zhp); 2281 2282 /* 2283 * Check to see if this property applies to our object 2284 */ 2285 if (!zfs_prop_valid_for_type(prop, zhp->zfs_type)) 2286 return (-1); 2287 2288 if (received && zfs_prop_readonly(prop)) 2289 return (-1); 2290 2291 if (src) 2292 *src = ZPROP_SRC_NONE; 2293 2294 switch (prop) { 2295 case ZFS_PROP_CREATION: 2296 /* 2297 * 'creation' is a time_t stored in the statistics. We convert 2298 * this into a string unless 'literal' is specified. 2299 */ 2300 { 2301 val = getprop_uint64(zhp, prop, &source); 2302 time_t time = (time_t)val; 2303 struct tm t; 2304 2305 if (literal || 2306 localtime_r(&time, &t) == NULL || 2307 strftime(propbuf, proplen, "%a %b %e %k:%M %Y", 2308 &t) == 0) 2309 (void) snprintf(propbuf, proplen, "%llu", val); 2310 } 2311 break; 2312 2313 case ZFS_PROP_MOUNTPOINT: 2314 /* 2315 * Getting the precise mountpoint can be tricky. 2316 * 2317 * - for 'none' or 'legacy', return those values. 2318 * - for inherited mountpoints, we want to take everything 2319 * after our ancestor and append it to the inherited value. 2320 * 2321 * If the pool has an alternate root, we want to prepend that 2322 * root to any values we return. 2323 */ 2324 2325 str = getprop_string(zhp, prop, &source); 2326 2327 if (str[0] == '/') { 2328 char buf[MAXPATHLEN]; 2329 char *root = buf; 2330 const char *relpath; 2331 2332 /* 2333 * If we inherit the mountpoint, even from a dataset 2334 * with a received value, the source will be the path of 2335 * the dataset we inherit from. If source is 2336 * ZPROP_SOURCE_VAL_RECVD, the received value is not 2337 * inherited. 2338 */ 2339 if (strcmp(source, ZPROP_SOURCE_VAL_RECVD) == 0) { 2340 relpath = ""; 2341 } else { 2342 relpath = zhp->zfs_name + strlen(source); 2343 if (relpath[0] == '/') 2344 relpath++; 2345 } 2346 2347 if ((zpool_get_prop(zhp->zpool_hdl, 2348 ZPOOL_PROP_ALTROOT, buf, MAXPATHLEN, NULL, 2349 B_FALSE)) || (strcmp(root, "-") == 0)) 2350 root[0] = '\0'; 2351 /* 2352 * Special case an alternate root of '/'. This will 2353 * avoid having multiple leading slashes in the 2354 * mountpoint path. 2355 */ 2356 if (strcmp(root, "/") == 0) 2357 root++; 2358 2359 /* 2360 * If the mountpoint is '/' then skip over this 2361 * if we are obtaining either an alternate root or 2362 * an inherited mountpoint. 2363 */ 2364 if (str[1] == '\0' && (root[0] != '\0' || 2365 relpath[0] != '\0')) 2366 str++; 2367 2368 if (relpath[0] == '\0') 2369 (void) snprintf(propbuf, proplen, "%s%s", 2370 root, str); 2371 else 2372 (void) snprintf(propbuf, proplen, "%s%s%s%s", 2373 root, str, relpath[0] == '@' ? "" : "/", 2374 relpath); 2375 } else { 2376 /* 'legacy' or 'none' */ 2377 (void) strlcpy(propbuf, str, proplen); 2378 } 2379 2380 break; 2381 2382 case ZFS_PROP_ORIGIN: 2383 str = getprop_string(zhp, prop, &source); 2384 if (str == NULL) 2385 return (-1); 2386 (void) strlcpy(propbuf, str, proplen); 2387 break; 2388 2389 case ZFS_PROP_CLONES: 2390 if (get_clones_string(zhp, propbuf, proplen) != 0) 2391 return (-1); 2392 break; 2393 2394 case ZFS_PROP_QUOTA: 2395 case ZFS_PROP_REFQUOTA: 2396 case ZFS_PROP_RESERVATION: 2397 case ZFS_PROP_REFRESERVATION: 2398 2399 if (get_numeric_property(zhp, prop, src, &source, &val) != 0) 2400 return (-1); 2401 2402 /* 2403 * If quota or reservation is 0, we translate this into 'none' 2404 * (unless literal is set), and indicate that it's the default 2405 * value. Otherwise, we print the number nicely and indicate 2406 * that its set locally. 2407 */ 2408 if (val == 0) { 2409 if (literal) 2410 (void) strlcpy(propbuf, "0", proplen); 2411 else 2412 (void) strlcpy(propbuf, "none", proplen); 2413 } else { 2414 if (literal) 2415 (void) snprintf(propbuf, proplen, "%llu", 2416 (u_longlong_t)val); 2417 else 2418 zfs_nicenum(val, propbuf, proplen); 2419 } 2420 break; 2421 2422 case ZFS_PROP_FILESYSTEM_LIMIT: 2423 case ZFS_PROP_SNAPSHOT_LIMIT: 2424 case ZFS_PROP_FILESYSTEM_COUNT: 2425 case ZFS_PROP_SNAPSHOT_COUNT: 2426 2427 if (get_numeric_property(zhp, prop, src, &source, &val) != 0) 2428 return (-1); 2429 2430 /* 2431 * If limit is UINT64_MAX, we translate this into 'none' (unless 2432 * literal is set), and indicate that it's the default value. 2433 * Otherwise, we print the number nicely and indicate that it's 2434 * set locally. 2435 */ 2436 if (literal) { 2437 (void) snprintf(propbuf, proplen, "%llu", 2438 (u_longlong_t)val); 2439 } else if (val == UINT64_MAX) { 2440 (void) strlcpy(propbuf, "none", proplen); 2441 } else { 2442 zfs_nicenum(val, propbuf, proplen); 2443 } 2444 break; 2445 2446 case ZFS_PROP_REFRATIO: 2447 case ZFS_PROP_COMPRESSRATIO: 2448 if (get_numeric_property(zhp, prop, src, &source, &val) != 0) 2449 return (-1); 2450 (void) snprintf(propbuf, proplen, "%llu.%02llux", 2451 (u_longlong_t)(val / 100), 2452 (u_longlong_t)(val % 100)); 2453 break; 2454 2455 case ZFS_PROP_TYPE: 2456 switch (zhp->zfs_type) { 2457 case ZFS_TYPE_FILESYSTEM: 2458 str = "filesystem"; 2459 break; 2460 case ZFS_TYPE_VOLUME: 2461 str = "volume"; 2462 break; 2463 case ZFS_TYPE_SNAPSHOT: 2464 str = "snapshot"; 2465 break; 2466 case ZFS_TYPE_BOOKMARK: 2467 str = "bookmark"; 2468 break; 2469 default: 2470 abort(); 2471 } 2472 (void) snprintf(propbuf, proplen, "%s", str); 2473 break; 2474 2475 case ZFS_PROP_MOUNTED: 2476 /* 2477 * The 'mounted' property is a pseudo-property that described 2478 * whether the filesystem is currently mounted. Even though 2479 * it's a boolean value, the typical values of "on" and "off" 2480 * don't make sense, so we translate to "yes" and "no". 2481 */ 2482 if (get_numeric_property(zhp, ZFS_PROP_MOUNTED, 2483 src, &source, &val) != 0) 2484 return (-1); 2485 if (val) 2486 (void) strlcpy(propbuf, "yes", proplen); 2487 else 2488 (void) strlcpy(propbuf, "no", proplen); 2489 break; 2490 2491 case ZFS_PROP_NAME: 2492 /* 2493 * The 'name' property is a pseudo-property derived from the 2494 * dataset name. It is presented as a real property to simplify 2495 * consumers. 2496 */ 2497 (void) strlcpy(propbuf, zhp->zfs_name, proplen); 2498 break; 2499 2500 case ZFS_PROP_MLSLABEL: 2501 { 2502 #ifdef illumos 2503 m_label_t *new_sl = NULL; 2504 char *ascii = NULL; /* human readable label */ 2505 2506 (void) strlcpy(propbuf, 2507 getprop_string(zhp, prop, &source), proplen); 2508 2509 if (literal || (strcasecmp(propbuf, 2510 ZFS_MLSLABEL_DEFAULT) == 0)) 2511 break; 2512 2513 /* 2514 * Try to translate the internal hex string to 2515 * human-readable output. If there are any 2516 * problems just use the hex string. 2517 */ 2518 2519 if (str_to_label(propbuf, &new_sl, MAC_LABEL, 2520 L_NO_CORRECTION, NULL) == -1) { 2521 m_label_free(new_sl); 2522 break; 2523 } 2524 2525 if (label_to_str(new_sl, &ascii, M_LABEL, 2526 DEF_NAMES) != 0) { 2527 if (ascii) 2528 free(ascii); 2529 m_label_free(new_sl); 2530 break; 2531 } 2532 m_label_free(new_sl); 2533 2534 (void) strlcpy(propbuf, ascii, proplen); 2535 free(ascii); 2536 #else /* !illumos */ 2537 propbuf[0] = '\0'; 2538 #endif /* illumos */ 2539 } 2540 break; 2541 2542 case ZFS_PROP_GUID: 2543 /* 2544 * GUIDs are stored as numbers, but they are identifiers. 2545 * We don't want them to be pretty printed, because pretty 2546 * printing mangles the ID into a truncated and useless value. 2547 */ 2548 if (get_numeric_property(zhp, prop, src, &source, &val) != 0) 2549 return (-1); 2550 (void) snprintf(propbuf, proplen, "%llu", (u_longlong_t)val); 2551 break; 2552 2553 default: 2554 switch (zfs_prop_get_type(prop)) { 2555 case PROP_TYPE_NUMBER: 2556 if (get_numeric_property(zhp, prop, src, 2557 &source, &val) != 0) 2558 return (-1); 2559 if (literal) 2560 (void) snprintf(propbuf, proplen, "%llu", 2561 (u_longlong_t)val); 2562 else 2563 zfs_nicenum(val, propbuf, proplen); 2564 break; 2565 2566 case PROP_TYPE_STRING: 2567 str = getprop_string(zhp, prop, &source); 2568 if (str == NULL) 2569 return (-1); 2570 (void) strlcpy(propbuf, str, proplen); 2571 break; 2572 2573 case PROP_TYPE_INDEX: 2574 if (get_numeric_property(zhp, prop, src, 2575 &source, &val) != 0) 2576 return (-1); 2577 if (zfs_prop_index_to_string(prop, val, &strval) != 0) 2578 return (-1); 2579 (void) strlcpy(propbuf, strval, proplen); 2580 break; 2581 2582 default: 2583 abort(); 2584 } 2585 } 2586 2587 get_source(zhp, src, source, statbuf, statlen); 2588 2589 return (0); 2590 } 2591 2592 /* 2593 * Utility function to get the given numeric property. Does no validation that 2594 * the given property is the appropriate type; should only be used with 2595 * hard-coded property types. 2596 */ 2597 uint64_t 2598 zfs_prop_get_int(zfs_handle_t *zhp, zfs_prop_t prop) 2599 { 2600 char *source; 2601 uint64_t val; 2602 2603 (void) get_numeric_property(zhp, prop, NULL, &source, &val); 2604 2605 return (val); 2606 } 2607 2608 int 2609 zfs_prop_set_int(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t val) 2610 { 2611 char buf[64]; 2612 2613 (void) snprintf(buf, sizeof (buf), "%llu", (longlong_t)val); 2614 return (zfs_prop_set(zhp, zfs_prop_to_name(prop), buf)); 2615 } 2616 2617 /* 2618 * Similar to zfs_prop_get(), but returns the value as an integer. 2619 */ 2620 int 2621 zfs_prop_get_numeric(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t *value, 2622 zprop_source_t *src, char *statbuf, size_t statlen) 2623 { 2624 char *source; 2625 2626 /* 2627 * Check to see if this property applies to our object 2628 */ 2629 if (!zfs_prop_valid_for_type(prop, zhp->zfs_type)) { 2630 return (zfs_error_fmt(zhp->zfs_hdl, EZFS_PROPTYPE, 2631 dgettext(TEXT_DOMAIN, "cannot get property '%s'"), 2632 zfs_prop_to_name(prop))); 2633 } 2634 2635 if (src) 2636 *src = ZPROP_SRC_NONE; 2637 2638 if (get_numeric_property(zhp, prop, src, &source, value) != 0) 2639 return (-1); 2640 2641 get_source(zhp, src, source, statbuf, statlen); 2642 2643 return (0); 2644 } 2645 2646 static int 2647 idmap_id_to_numeric_domain_rid(uid_t id, boolean_t isuser, 2648 char **domainp, idmap_rid_t *ridp) 2649 { 2650 #ifdef illumos 2651 idmap_get_handle_t *get_hdl = NULL; 2652 idmap_stat status; 2653 int err = EINVAL; 2654 2655 if (idmap_get_create(&get_hdl) != IDMAP_SUCCESS) 2656 goto out; 2657 2658 if (isuser) { 2659 err = idmap_get_sidbyuid(get_hdl, id, 2660 IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status); 2661 } else { 2662 err = idmap_get_sidbygid(get_hdl, id, 2663 IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status); 2664 } 2665 if (err == IDMAP_SUCCESS && 2666 idmap_get_mappings(get_hdl) == IDMAP_SUCCESS && 2667 status == IDMAP_SUCCESS) 2668 err = 0; 2669 else 2670 err = EINVAL; 2671 out: 2672 if (get_hdl) 2673 idmap_get_destroy(get_hdl); 2674 return (err); 2675 #else /* !illumos */ 2676 assert(!"invalid code path"); 2677 return (EINVAL); // silence compiler warning 2678 #endif /* illumos */ 2679 } 2680 2681 /* 2682 * convert the propname into parameters needed by kernel 2683 * Eg: userquota@ahrens -> ZFS_PROP_USERQUOTA, "", 126829 2684 * Eg: userused@matt@domain -> ZFS_PROP_USERUSED, "S-1-123-456", 789 2685 */ 2686 static int 2687 userquota_propname_decode(const char *propname, boolean_t zoned, 2688 zfs_userquota_prop_t *typep, char *domain, int domainlen, uint64_t *ridp) 2689 { 2690 zfs_userquota_prop_t type; 2691 char *cp, *end; 2692 char *numericsid = NULL; 2693 boolean_t isuser; 2694 2695 domain[0] = '\0'; 2696 *ridp = 0; 2697 /* Figure out the property type ({user|group}{quota|space}) */ 2698 for (type = 0; type < ZFS_NUM_USERQUOTA_PROPS; type++) { 2699 if (strncmp(propname, zfs_userquota_prop_prefixes[type], 2700 strlen(zfs_userquota_prop_prefixes[type])) == 0) 2701 break; 2702 } 2703 if (type == ZFS_NUM_USERQUOTA_PROPS) 2704 return (EINVAL); 2705 *typep = type; 2706 2707 isuser = (type == ZFS_PROP_USERQUOTA || 2708 type == ZFS_PROP_USERUSED); 2709 2710 cp = strchr(propname, '@') + 1; 2711 2712 if (strchr(cp, '@')) { 2713 #ifdef illumos 2714 /* 2715 * It's a SID name (eg "user@domain") that needs to be 2716 * turned into S-1-domainID-RID. 2717 */ 2718 int flag = 0; 2719 idmap_stat stat, map_stat; 2720 uid_t pid; 2721 idmap_rid_t rid; 2722 idmap_get_handle_t *gh = NULL; 2723 2724 stat = idmap_get_create(&gh); 2725 if (stat != IDMAP_SUCCESS) { 2726 idmap_get_destroy(gh); 2727 return (ENOMEM); 2728 } 2729 if (zoned && getzoneid() == GLOBAL_ZONEID) 2730 return (ENOENT); 2731 if (isuser) { 2732 stat = idmap_getuidbywinname(cp, NULL, flag, &pid); 2733 if (stat < 0) 2734 return (ENOENT); 2735 stat = idmap_get_sidbyuid(gh, pid, flag, &numericsid, 2736 &rid, &map_stat); 2737 } else { 2738 stat = idmap_getgidbywinname(cp, NULL, flag, &pid); 2739 if (stat < 0) 2740 return (ENOENT); 2741 stat = idmap_get_sidbygid(gh, pid, flag, &numericsid, 2742 &rid, &map_stat); 2743 } 2744 if (stat < 0) { 2745 idmap_get_destroy(gh); 2746 return (ENOENT); 2747 } 2748 stat = idmap_get_mappings(gh); 2749 idmap_get_destroy(gh); 2750 2751 if (stat < 0) { 2752 return (ENOENT); 2753 } 2754 if (numericsid == NULL) 2755 return (ENOENT); 2756 cp = numericsid; 2757 *ridp = rid; 2758 /* will be further decoded below */ 2759 #else /* !illumos */ 2760 return (ENOENT); 2761 #endif /* illumos */ 2762 } 2763 2764 if (strncmp(cp, "S-1-", 4) == 0) { 2765 /* It's a numeric SID (eg "S-1-234-567-89") */ 2766 (void) strlcpy(domain, cp, domainlen); 2767 errno = 0; 2768 if (*ridp == 0) { 2769 cp = strrchr(domain, '-'); 2770 *cp = '\0'; 2771 cp++; 2772 *ridp = strtoull(cp, &end, 10); 2773 } else { 2774 end = ""; 2775 } 2776 if (numericsid) { 2777 free(numericsid); 2778 numericsid = NULL; 2779 } 2780 if (errno != 0 || *end != '\0') 2781 return (EINVAL); 2782 } else if (!isdigit(*cp)) { 2783 /* 2784 * It's a user/group name (eg "user") that needs to be 2785 * turned into a uid/gid 2786 */ 2787 if (zoned && getzoneid() == GLOBAL_ZONEID) 2788 return (ENOENT); 2789 if (isuser) { 2790 struct passwd *pw; 2791 pw = getpwnam(cp); 2792 if (pw == NULL) 2793 return (ENOENT); 2794 *ridp = pw->pw_uid; 2795 } else { 2796 struct group *gr; 2797 gr = getgrnam(cp); 2798 if (gr == NULL) 2799 return (ENOENT); 2800 *ridp = gr->gr_gid; 2801 } 2802 } else { 2803 /* It's a user/group ID (eg "12345"). */ 2804 uid_t id = strtoul(cp, &end, 10); 2805 idmap_rid_t rid; 2806 char *mapdomain; 2807 2808 if (*end != '\0') 2809 return (EINVAL); 2810 if (id > MAXUID) { 2811 /* It's an ephemeral ID. */ 2812 if (idmap_id_to_numeric_domain_rid(id, isuser, 2813 &mapdomain, &rid) != 0) 2814 return (ENOENT); 2815 (void) strlcpy(domain, mapdomain, domainlen); 2816 *ridp = rid; 2817 } else { 2818 *ridp = id; 2819 } 2820 } 2821 2822 ASSERT3P(numericsid, ==, NULL); 2823 return (0); 2824 } 2825 2826 static int 2827 zfs_prop_get_userquota_common(zfs_handle_t *zhp, const char *propname, 2828 uint64_t *propvalue, zfs_userquota_prop_t *typep) 2829 { 2830 int err; 2831 zfs_cmd_t zc = { 0 }; 2832 2833 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 2834 2835 err = userquota_propname_decode(propname, 2836 zfs_prop_get_int(zhp, ZFS_PROP_ZONED), 2837 typep, zc.zc_value, sizeof (zc.zc_value), &zc.zc_guid); 2838 zc.zc_objset_type = *typep; 2839 if (err) 2840 return (err); 2841 2842 err = ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_USERSPACE_ONE, &zc); 2843 if (err) 2844 return (err); 2845 2846 *propvalue = zc.zc_cookie; 2847 return (0); 2848 } 2849 2850 int 2851 zfs_prop_get_userquota_int(zfs_handle_t *zhp, const char *propname, 2852 uint64_t *propvalue) 2853 { 2854 zfs_userquota_prop_t type; 2855 2856 return (zfs_prop_get_userquota_common(zhp, propname, propvalue, 2857 &type)); 2858 } 2859 2860 int 2861 zfs_prop_get_userquota(zfs_handle_t *zhp, const char *propname, 2862 char *propbuf, int proplen, boolean_t literal) 2863 { 2864 int err; 2865 uint64_t propvalue; 2866 zfs_userquota_prop_t type; 2867 2868 err = zfs_prop_get_userquota_common(zhp, propname, &propvalue, 2869 &type); 2870 2871 if (err) 2872 return (err); 2873 2874 if (literal) { 2875 (void) snprintf(propbuf, proplen, "%llu", propvalue); 2876 } else if (propvalue == 0 && 2877 (type == ZFS_PROP_USERQUOTA || type == ZFS_PROP_GROUPQUOTA)) { 2878 (void) strlcpy(propbuf, "none", proplen); 2879 } else { 2880 zfs_nicenum(propvalue, propbuf, proplen); 2881 } 2882 return (0); 2883 } 2884 2885 int 2886 zfs_prop_get_written_int(zfs_handle_t *zhp, const char *propname, 2887 uint64_t *propvalue) 2888 { 2889 int err; 2890 zfs_cmd_t zc = { 0 }; 2891 const char *snapname; 2892 2893 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 2894 2895 snapname = strchr(propname, '@') + 1; 2896 if (strchr(snapname, '@')) { 2897 (void) strlcpy(zc.zc_value, snapname, sizeof (zc.zc_value)); 2898 } else { 2899 /* snapname is the short name, append it to zhp's fsname */ 2900 char *cp; 2901 2902 (void) strlcpy(zc.zc_value, zhp->zfs_name, 2903 sizeof (zc.zc_value)); 2904 cp = strchr(zc.zc_value, '@'); 2905 if (cp != NULL) 2906 *cp = '\0'; 2907 (void) strlcat(zc.zc_value, "@", sizeof (zc.zc_value)); 2908 (void) strlcat(zc.zc_value, snapname, sizeof (zc.zc_value)); 2909 } 2910 2911 err = ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_SPACE_WRITTEN, &zc); 2912 if (err) 2913 return (err); 2914 2915 *propvalue = zc.zc_cookie; 2916 return (0); 2917 } 2918 2919 int 2920 zfs_prop_get_written(zfs_handle_t *zhp, const char *propname, 2921 char *propbuf, int proplen, boolean_t literal) 2922 { 2923 int err; 2924 uint64_t propvalue; 2925 2926 err = zfs_prop_get_written_int(zhp, propname, &propvalue); 2927 2928 if (err) 2929 return (err); 2930 2931 if (literal) { 2932 (void) snprintf(propbuf, proplen, "%llu", propvalue); 2933 } else { 2934 zfs_nicenum(propvalue, propbuf, proplen); 2935 } 2936 return (0); 2937 } 2938 2939 /* 2940 * Returns the name of the given zfs handle. 2941 */ 2942 const char * 2943 zfs_get_name(const zfs_handle_t *zhp) 2944 { 2945 return (zhp->zfs_name); 2946 } 2947 2948 /* 2949 * Returns the name of the parent pool for the given zfs handle. 2950 */ 2951 const char * 2952 zfs_get_pool_name(const zfs_handle_t *zhp) 2953 { 2954 return (zhp->zpool_hdl->zpool_name); 2955 } 2956 2957 /* 2958 * Returns the type of the given zfs handle. 2959 */ 2960 zfs_type_t 2961 zfs_get_type(const zfs_handle_t *zhp) 2962 { 2963 return (zhp->zfs_type); 2964 } 2965 2966 /* 2967 * Is one dataset name a child dataset of another? 2968 * 2969 * Needs to handle these cases: 2970 * Dataset 1 "a/foo" "a/foo" "a/foo" "a/foo" 2971 * Dataset 2 "a/fo" "a/foobar" "a/bar/baz" "a/foo/bar" 2972 * Descendant? No. No. No. Yes. 2973 */ 2974 static boolean_t 2975 is_descendant(const char *ds1, const char *ds2) 2976 { 2977 size_t d1len = strlen(ds1); 2978 2979 /* ds2 can't be a descendant if it's smaller */ 2980 if (strlen(ds2) < d1len) 2981 return (B_FALSE); 2982 2983 /* otherwise, compare strings and verify that there's a '/' char */ 2984 return (ds2[d1len] == '/' && (strncmp(ds1, ds2, d1len) == 0)); 2985 } 2986 2987 /* 2988 * Given a complete name, return just the portion that refers to the parent. 2989 * Will return -1 if there is no parent (path is just the name of the 2990 * pool). 2991 */ 2992 static int 2993 parent_name(const char *path, char *buf, size_t buflen) 2994 { 2995 char *slashp; 2996 2997 (void) strlcpy(buf, path, buflen); 2998 2999 if ((slashp = strrchr(buf, '/')) == NULL) 3000 return (-1); 3001 *slashp = '\0'; 3002 3003 return (0); 3004 } 3005 3006 /* 3007 * If accept_ancestor is false, then check to make sure that the given path has 3008 * a parent, and that it exists. If accept_ancestor is true, then find the 3009 * closest existing ancestor for the given path. In prefixlen return the 3010 * length of already existing prefix of the given path. We also fetch the 3011 * 'zoned' property, which is used to validate property settings when creating 3012 * new datasets. 3013 */ 3014 static int 3015 check_parents(libzfs_handle_t *hdl, const char *path, uint64_t *zoned, 3016 boolean_t accept_ancestor, int *prefixlen) 3017 { 3018 zfs_cmd_t zc = { 0 }; 3019 char parent[ZFS_MAX_DATASET_NAME_LEN]; 3020 char *slash; 3021 zfs_handle_t *zhp; 3022 char errbuf[1024]; 3023 uint64_t is_zoned; 3024 3025 (void) snprintf(errbuf, sizeof (errbuf), 3026 dgettext(TEXT_DOMAIN, "cannot create '%s'"), path); 3027 3028 /* get parent, and check to see if this is just a pool */ 3029 if (parent_name(path, parent, sizeof (parent)) != 0) { 3030 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3031 "missing dataset name")); 3032 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3033 } 3034 3035 /* check to see if the pool exists */ 3036 if ((slash = strchr(parent, '/')) == NULL) 3037 slash = parent + strlen(parent); 3038 (void) strncpy(zc.zc_name, parent, slash - parent); 3039 zc.zc_name[slash - parent] = '\0'; 3040 if (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_STATS, &zc) != 0 && 3041 errno == ENOENT) { 3042 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3043 "no such pool '%s'"), zc.zc_name); 3044 return (zfs_error(hdl, EZFS_NOENT, errbuf)); 3045 } 3046 3047 /* check to see if the parent dataset exists */ 3048 while ((zhp = make_dataset_handle(hdl, parent)) == NULL) { 3049 if (errno == ENOENT && accept_ancestor) { 3050 /* 3051 * Go deeper to find an ancestor, give up on top level. 3052 */ 3053 if (parent_name(parent, parent, sizeof (parent)) != 0) { 3054 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3055 "no such pool '%s'"), zc.zc_name); 3056 return (zfs_error(hdl, EZFS_NOENT, errbuf)); 3057 } 3058 } else if (errno == ENOENT) { 3059 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3060 "parent does not exist")); 3061 return (zfs_error(hdl, EZFS_NOENT, errbuf)); 3062 } else 3063 return (zfs_standard_error(hdl, errno, errbuf)); 3064 } 3065 3066 is_zoned = zfs_prop_get_int(zhp, ZFS_PROP_ZONED); 3067 if (zoned != NULL) 3068 *zoned = is_zoned; 3069 3070 /* we are in a non-global zone, but parent is in the global zone */ 3071 if (getzoneid() != GLOBAL_ZONEID && !is_zoned) { 3072 (void) zfs_standard_error(hdl, EPERM, errbuf); 3073 zfs_close(zhp); 3074 return (-1); 3075 } 3076 3077 /* make sure parent is a filesystem */ 3078 if (zfs_get_type(zhp) != ZFS_TYPE_FILESYSTEM) { 3079 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3080 "parent is not a filesystem")); 3081 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf); 3082 zfs_close(zhp); 3083 return (-1); 3084 } 3085 3086 zfs_close(zhp); 3087 if (prefixlen != NULL) 3088 *prefixlen = strlen(parent); 3089 return (0); 3090 } 3091 3092 /* 3093 * Finds whether the dataset of the given type(s) exists. 3094 */ 3095 boolean_t 3096 zfs_dataset_exists(libzfs_handle_t *hdl, const char *path, zfs_type_t types) 3097 { 3098 zfs_handle_t *zhp; 3099 3100 if (!zfs_validate_name(hdl, path, types, B_FALSE)) 3101 return (B_FALSE); 3102 3103 /* 3104 * Try to get stats for the dataset, which will tell us if it exists. 3105 */ 3106 if ((zhp = make_dataset_handle(hdl, path)) != NULL) { 3107 int ds_type = zhp->zfs_type; 3108 3109 zfs_close(zhp); 3110 if (types & ds_type) 3111 return (B_TRUE); 3112 } 3113 return (B_FALSE); 3114 } 3115 3116 /* 3117 * Given a path to 'target', create all the ancestors between 3118 * the prefixlen portion of the path, and the target itself. 3119 * Fail if the initial prefixlen-ancestor does not already exist. 3120 */ 3121 int 3122 create_parents(libzfs_handle_t *hdl, char *target, int prefixlen) 3123 { 3124 zfs_handle_t *h; 3125 char *cp; 3126 const char *opname; 3127 3128 /* make sure prefix exists */ 3129 cp = target + prefixlen; 3130 if (*cp != '/') { 3131 assert(strchr(cp, '/') == NULL); 3132 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM); 3133 } else { 3134 *cp = '\0'; 3135 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM); 3136 *cp = '/'; 3137 } 3138 if (h == NULL) 3139 return (-1); 3140 zfs_close(h); 3141 3142 /* 3143 * Attempt to create, mount, and share any ancestor filesystems, 3144 * up to the prefixlen-long one. 3145 */ 3146 for (cp = target + prefixlen + 1; 3147 (cp = strchr(cp, '/')) != NULL; *cp = '/', cp++) { 3148 3149 *cp = '\0'; 3150 3151 h = make_dataset_handle(hdl, target); 3152 if (h) { 3153 /* it already exists, nothing to do here */ 3154 zfs_close(h); 3155 continue; 3156 } 3157 3158 if (zfs_create(hdl, target, ZFS_TYPE_FILESYSTEM, 3159 NULL) != 0) { 3160 opname = dgettext(TEXT_DOMAIN, "create"); 3161 goto ancestorerr; 3162 } 3163 3164 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM); 3165 if (h == NULL) { 3166 opname = dgettext(TEXT_DOMAIN, "open"); 3167 goto ancestorerr; 3168 } 3169 3170 if (zfs_mount(h, NULL, 0) != 0) { 3171 opname = dgettext(TEXT_DOMAIN, "mount"); 3172 goto ancestorerr; 3173 } 3174 3175 if (zfs_share(h) != 0) { 3176 opname = dgettext(TEXT_DOMAIN, "share"); 3177 goto ancestorerr; 3178 } 3179 3180 zfs_close(h); 3181 } 3182 3183 return (0); 3184 3185 ancestorerr: 3186 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3187 "failed to %s ancestor '%s'"), opname, target); 3188 return (-1); 3189 } 3190 3191 /* 3192 * Creates non-existing ancestors of the given path. 3193 */ 3194 int 3195 zfs_create_ancestors(libzfs_handle_t *hdl, const char *path) 3196 { 3197 int prefix; 3198 char *path_copy; 3199 int rc = 0; 3200 3201 if (check_parents(hdl, path, NULL, B_TRUE, &prefix) != 0) 3202 return (-1); 3203 3204 if ((path_copy = strdup(path)) != NULL) { 3205 rc = create_parents(hdl, path_copy, prefix); 3206 free(path_copy); 3207 } 3208 if (path_copy == NULL || rc != 0) 3209 return (-1); 3210 3211 return (0); 3212 } 3213 3214 /* 3215 * Create a new filesystem or volume. 3216 */ 3217 int 3218 zfs_create(libzfs_handle_t *hdl, const char *path, zfs_type_t type, 3219 nvlist_t *props) 3220 { 3221 int ret; 3222 uint64_t size = 0; 3223 uint64_t blocksize = zfs_prop_default_numeric(ZFS_PROP_VOLBLOCKSIZE); 3224 char errbuf[1024]; 3225 uint64_t zoned; 3226 enum lzc_dataset_type ost; 3227 3228 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3229 "cannot create '%s'"), path); 3230 3231 /* validate the path, taking care to note the extended error message */ 3232 if (!zfs_validate_name(hdl, path, type, B_TRUE)) 3233 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3234 3235 /* validate parents exist */ 3236 if (check_parents(hdl, path, &zoned, B_FALSE, NULL) != 0) 3237 return (-1); 3238 3239 /* 3240 * The failure modes when creating a dataset of a different type over 3241 * one that already exists is a little strange. In particular, if you 3242 * try to create a dataset on top of an existing dataset, the ioctl() 3243 * will return ENOENT, not EEXIST. To prevent this from happening, we 3244 * first try to see if the dataset exists. 3245 */ 3246 if (zfs_dataset_exists(hdl, path, ZFS_TYPE_DATASET)) { 3247 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3248 "dataset already exists")); 3249 return (zfs_error(hdl, EZFS_EXISTS, errbuf)); 3250 } 3251 3252 if (type == ZFS_TYPE_VOLUME) 3253 ost = LZC_DATSET_TYPE_ZVOL; 3254 else 3255 ost = LZC_DATSET_TYPE_ZFS; 3256 3257 /* open zpool handle for prop validation */ 3258 char pool_path[ZFS_MAX_DATASET_NAME_LEN]; 3259 (void) strlcpy(pool_path, path, sizeof (pool_path)); 3260 3261 /* truncate pool_path at first slash */ 3262 char *p = strchr(pool_path, '/'); 3263 if (p != NULL) 3264 *p = '\0'; 3265 3266 zpool_handle_t *zpool_handle = zpool_open(hdl, pool_path); 3267 3268 if (props && (props = zfs_valid_proplist(hdl, type, props, 3269 zoned, NULL, zpool_handle, errbuf)) == 0) { 3270 zpool_close(zpool_handle); 3271 return (-1); 3272 } 3273 zpool_close(zpool_handle); 3274 3275 if (type == ZFS_TYPE_VOLUME) { 3276 /* 3277 * If we are creating a volume, the size and block size must 3278 * satisfy a few restraints. First, the blocksize must be a 3279 * valid block size between SPA_{MIN,MAX}BLOCKSIZE. Second, the 3280 * volsize must be a multiple of the block size, and cannot be 3281 * zero. 3282 */ 3283 if (props == NULL || nvlist_lookup_uint64(props, 3284 zfs_prop_to_name(ZFS_PROP_VOLSIZE), &size) != 0) { 3285 nvlist_free(props); 3286 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3287 "missing volume size")); 3288 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 3289 } 3290 3291 if ((ret = nvlist_lookup_uint64(props, 3292 zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE), 3293 &blocksize)) != 0) { 3294 if (ret == ENOENT) { 3295 blocksize = zfs_prop_default_numeric( 3296 ZFS_PROP_VOLBLOCKSIZE); 3297 } else { 3298 nvlist_free(props); 3299 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3300 "missing volume block size")); 3301 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 3302 } 3303 } 3304 3305 if (size == 0) { 3306 nvlist_free(props); 3307 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3308 "volume size cannot be zero")); 3309 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 3310 } 3311 3312 if (size % blocksize != 0) { 3313 nvlist_free(props); 3314 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3315 "volume size must be a multiple of volume block " 3316 "size")); 3317 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 3318 } 3319 } 3320 3321 /* create the dataset */ 3322 ret = lzc_create(path, ost, props); 3323 nvlist_free(props); 3324 3325 /* check for failure */ 3326 if (ret != 0) { 3327 char parent[ZFS_MAX_DATASET_NAME_LEN]; 3328 (void) parent_name(path, parent, sizeof (parent)); 3329 3330 switch (errno) { 3331 case ENOENT: 3332 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3333 "no such parent '%s'"), parent); 3334 return (zfs_error(hdl, EZFS_NOENT, errbuf)); 3335 3336 case EINVAL: 3337 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3338 "parent '%s' is not a filesystem"), parent); 3339 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 3340 3341 case ENOTSUP: 3342 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3343 "pool must be upgraded to set this " 3344 "property or value")); 3345 return (zfs_error(hdl, EZFS_BADVERSION, errbuf)); 3346 #ifdef _ILP32 3347 case EOVERFLOW: 3348 /* 3349 * This platform can't address a volume this big. 3350 */ 3351 if (type == ZFS_TYPE_VOLUME) 3352 return (zfs_error(hdl, EZFS_VOLTOOBIG, 3353 errbuf)); 3354 #endif 3355 /* FALLTHROUGH */ 3356 default: 3357 return (zfs_standard_error(hdl, errno, errbuf)); 3358 } 3359 } 3360 3361 return (0); 3362 } 3363 3364 /* 3365 * Destroys the given dataset. The caller must make sure that the filesystem 3366 * isn't mounted, and that there are no active dependents. If the file system 3367 * does not exist this function does nothing. 3368 */ 3369 int 3370 zfs_destroy(zfs_handle_t *zhp, boolean_t defer) 3371 { 3372 zfs_cmd_t zc = { 0 }; 3373 3374 if (zhp->zfs_type == ZFS_TYPE_BOOKMARK) { 3375 nvlist_t *nv = fnvlist_alloc(); 3376 fnvlist_add_boolean(nv, zhp->zfs_name); 3377 int error = lzc_destroy_bookmarks(nv, NULL); 3378 fnvlist_free(nv); 3379 if (error != 0) { 3380 return (zfs_standard_error_fmt(zhp->zfs_hdl, errno, 3381 dgettext(TEXT_DOMAIN, "cannot destroy '%s'"), 3382 zhp->zfs_name)); 3383 } 3384 return (0); 3385 } 3386 3387 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 3388 3389 if (ZFS_IS_VOLUME(zhp)) { 3390 zc.zc_objset_type = DMU_OST_ZVOL; 3391 } else { 3392 zc.zc_objset_type = DMU_OST_ZFS; 3393 } 3394 3395 zc.zc_defer_destroy = defer; 3396 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_DESTROY, &zc) != 0 && 3397 errno != ENOENT) { 3398 return (zfs_standard_error_fmt(zhp->zfs_hdl, errno, 3399 dgettext(TEXT_DOMAIN, "cannot destroy '%s'"), 3400 zhp->zfs_name)); 3401 } 3402 3403 remove_mountpoint(zhp); 3404 3405 return (0); 3406 } 3407 3408 struct destroydata { 3409 nvlist_t *nvl; 3410 const char *snapname; 3411 }; 3412 3413 static int 3414 zfs_check_snap_cb(zfs_handle_t *zhp, void *arg) 3415 { 3416 struct destroydata *dd = arg; 3417 char name[ZFS_MAX_DATASET_NAME_LEN]; 3418 int rv = 0; 3419 3420 (void) snprintf(name, sizeof (name), 3421 "%s@%s", zhp->zfs_name, dd->snapname); 3422 3423 if (lzc_exists(name)) 3424 verify(nvlist_add_boolean(dd->nvl, name) == 0); 3425 3426 rv = zfs_iter_filesystems(zhp, zfs_check_snap_cb, dd); 3427 zfs_close(zhp); 3428 return (rv); 3429 } 3430 3431 /* 3432 * Destroys all snapshots with the given name in zhp & descendants. 3433 */ 3434 int 3435 zfs_destroy_snaps(zfs_handle_t *zhp, char *snapname, boolean_t defer) 3436 { 3437 int ret; 3438 struct destroydata dd = { 0 }; 3439 3440 dd.snapname = snapname; 3441 verify(nvlist_alloc(&dd.nvl, NV_UNIQUE_NAME, 0) == 0); 3442 (void) zfs_check_snap_cb(zfs_handle_dup(zhp), &dd); 3443 3444 if (nvlist_empty(dd.nvl)) { 3445 ret = zfs_standard_error_fmt(zhp->zfs_hdl, ENOENT, 3446 dgettext(TEXT_DOMAIN, "cannot destroy '%s@%s'"), 3447 zhp->zfs_name, snapname); 3448 } else { 3449 ret = zfs_destroy_snaps_nvl(zhp->zfs_hdl, dd.nvl, defer); 3450 } 3451 nvlist_free(dd.nvl); 3452 return (ret); 3453 } 3454 3455 /* 3456 * Destroys all the snapshots named in the nvlist. 3457 */ 3458 int 3459 zfs_destroy_snaps_nvl(libzfs_handle_t *hdl, nvlist_t *snaps, boolean_t defer) 3460 { 3461 int ret; 3462 nvlist_t *errlist = NULL; 3463 3464 ret = lzc_destroy_snaps(snaps, defer, &errlist); 3465 3466 if (ret == 0) { 3467 nvlist_free(errlist); 3468 return (0); 3469 } 3470 3471 if (nvlist_empty(errlist)) { 3472 char errbuf[1024]; 3473 (void) snprintf(errbuf, sizeof (errbuf), 3474 dgettext(TEXT_DOMAIN, "cannot destroy snapshots")); 3475 3476 ret = zfs_standard_error(hdl, ret, errbuf); 3477 } 3478 for (nvpair_t *pair = nvlist_next_nvpair(errlist, NULL); 3479 pair != NULL; pair = nvlist_next_nvpair(errlist, pair)) { 3480 char errbuf[1024]; 3481 (void) snprintf(errbuf, sizeof (errbuf), 3482 dgettext(TEXT_DOMAIN, "cannot destroy snapshot %s"), 3483 nvpair_name(pair)); 3484 3485 switch (fnvpair_value_int32(pair)) { 3486 case EEXIST: 3487 zfs_error_aux(hdl, 3488 dgettext(TEXT_DOMAIN, "snapshot is cloned")); 3489 ret = zfs_error(hdl, EZFS_EXISTS, errbuf); 3490 break; 3491 default: 3492 ret = zfs_standard_error(hdl, errno, errbuf); 3493 break; 3494 } 3495 } 3496 3497 nvlist_free(errlist); 3498 return (ret); 3499 } 3500 3501 /* 3502 * Clones the given dataset. The target must be of the same type as the source. 3503 */ 3504 int 3505 zfs_clone(zfs_handle_t *zhp, const char *target, nvlist_t *props) 3506 { 3507 char parent[ZFS_MAX_DATASET_NAME_LEN]; 3508 int ret; 3509 char errbuf[1024]; 3510 libzfs_handle_t *hdl = zhp->zfs_hdl; 3511 uint64_t zoned; 3512 3513 assert(zhp->zfs_type == ZFS_TYPE_SNAPSHOT); 3514 3515 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3516 "cannot create '%s'"), target); 3517 3518 /* validate the target/clone name */ 3519 if (!zfs_validate_name(hdl, target, ZFS_TYPE_FILESYSTEM, B_TRUE)) 3520 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3521 3522 /* validate parents exist */ 3523 if (check_parents(hdl, target, &zoned, B_FALSE, NULL) != 0) 3524 return (-1); 3525 3526 (void) parent_name(target, parent, sizeof (parent)); 3527 3528 /* do the clone */ 3529 3530 if (props) { 3531 zfs_type_t type; 3532 if (ZFS_IS_VOLUME(zhp)) { 3533 type = ZFS_TYPE_VOLUME; 3534 } else { 3535 type = ZFS_TYPE_FILESYSTEM; 3536 } 3537 if ((props = zfs_valid_proplist(hdl, type, props, zoned, 3538 zhp, zhp->zpool_hdl, errbuf)) == NULL) 3539 return (-1); 3540 } 3541 3542 ret = lzc_clone(target, zhp->zfs_name, props); 3543 nvlist_free(props); 3544 3545 if (ret != 0) { 3546 switch (errno) { 3547 3548 case ENOENT: 3549 /* 3550 * The parent doesn't exist. We should have caught this 3551 * above, but there may a race condition that has since 3552 * destroyed the parent. 3553 * 3554 * At this point, we don't know whether it's the source 3555 * that doesn't exist anymore, or whether the target 3556 * dataset doesn't exist. 3557 */ 3558 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN, 3559 "no such parent '%s'"), parent); 3560 return (zfs_error(zhp->zfs_hdl, EZFS_NOENT, errbuf)); 3561 3562 case EXDEV: 3563 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN, 3564 "source and target pools differ")); 3565 return (zfs_error(zhp->zfs_hdl, EZFS_CROSSTARGET, 3566 errbuf)); 3567 3568 default: 3569 return (zfs_standard_error(zhp->zfs_hdl, errno, 3570 errbuf)); 3571 } 3572 } 3573 3574 return (ret); 3575 } 3576 3577 /* 3578 * Promotes the given clone fs to be the clone parent. 3579 */ 3580 int 3581 zfs_promote(zfs_handle_t *zhp) 3582 { 3583 libzfs_handle_t *hdl = zhp->zfs_hdl; 3584 zfs_cmd_t zc = { 0 }; 3585 char parent[MAXPATHLEN]; 3586 int ret; 3587 char errbuf[1024]; 3588 3589 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3590 "cannot promote '%s'"), zhp->zfs_name); 3591 3592 if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) { 3593 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3594 "snapshots can not be promoted")); 3595 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 3596 } 3597 3598 (void) strlcpy(parent, zhp->zfs_dmustats.dds_origin, sizeof (parent)); 3599 if (parent[0] == '\0') { 3600 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3601 "not a cloned filesystem")); 3602 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 3603 } 3604 3605 (void) strlcpy(zc.zc_value, zhp->zfs_dmustats.dds_origin, 3606 sizeof (zc.zc_value)); 3607 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 3608 ret = zfs_ioctl(hdl, ZFS_IOC_PROMOTE, &zc); 3609 3610 if (ret != 0) { 3611 int save_errno = errno; 3612 3613 switch (save_errno) { 3614 case EEXIST: 3615 /* There is a conflicting snapshot name. */ 3616 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3617 "conflicting snapshot '%s' from parent '%s'"), 3618 zc.zc_string, parent); 3619 return (zfs_error(hdl, EZFS_EXISTS, errbuf)); 3620 3621 default: 3622 return (zfs_standard_error(hdl, save_errno, errbuf)); 3623 } 3624 } 3625 return (ret); 3626 } 3627 3628 typedef struct snapdata { 3629 nvlist_t *sd_nvl; 3630 const char *sd_snapname; 3631 } snapdata_t; 3632 3633 static int 3634 zfs_snapshot_cb(zfs_handle_t *zhp, void *arg) 3635 { 3636 snapdata_t *sd = arg; 3637 char name[ZFS_MAX_DATASET_NAME_LEN]; 3638 int rv = 0; 3639 3640 if (zfs_prop_get_int(zhp, ZFS_PROP_INCONSISTENT) == 0) { 3641 (void) snprintf(name, sizeof (name), 3642 "%s@%s", zfs_get_name(zhp), sd->sd_snapname); 3643 3644 fnvlist_add_boolean(sd->sd_nvl, name); 3645 3646 rv = zfs_iter_filesystems(zhp, zfs_snapshot_cb, sd); 3647 } 3648 zfs_close(zhp); 3649 3650 return (rv); 3651 } 3652 3653 /* 3654 * Creates snapshots. The keys in the snaps nvlist are the snapshots to be 3655 * created. 3656 */ 3657 int 3658 zfs_snapshot_nvl(libzfs_handle_t *hdl, nvlist_t *snaps, nvlist_t *props) 3659 { 3660 int ret; 3661 char errbuf[1024]; 3662 nvpair_t *elem; 3663 nvlist_t *errors; 3664 3665 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3666 "cannot create snapshots ")); 3667 3668 elem = NULL; 3669 while ((elem = nvlist_next_nvpair(snaps, elem)) != NULL) { 3670 const char *snapname = nvpair_name(elem); 3671 3672 /* validate the target name */ 3673 if (!zfs_validate_name(hdl, snapname, ZFS_TYPE_SNAPSHOT, 3674 B_TRUE)) { 3675 (void) snprintf(errbuf, sizeof (errbuf), 3676 dgettext(TEXT_DOMAIN, 3677 "cannot create snapshot '%s'"), snapname); 3678 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3679 } 3680 } 3681 3682 /* 3683 * get pool handle for prop validation. assumes all snaps are in the 3684 * same pool, as does lzc_snapshot (below). 3685 */ 3686 char pool[ZFS_MAX_DATASET_NAME_LEN]; 3687 elem = nvlist_next_nvpair(snaps, NULL); 3688 (void) strlcpy(pool, nvpair_name(elem), sizeof (pool)); 3689 pool[strcspn(pool, "/@")] = '\0'; 3690 zpool_handle_t *zpool_hdl = zpool_open(hdl, pool); 3691 3692 if (props != NULL && 3693 (props = zfs_valid_proplist(hdl, ZFS_TYPE_SNAPSHOT, 3694 props, B_FALSE, NULL, zpool_hdl, errbuf)) == NULL) { 3695 zpool_close(zpool_hdl); 3696 return (-1); 3697 } 3698 zpool_close(zpool_hdl); 3699 3700 ret = lzc_snapshot(snaps, props, &errors); 3701 3702 if (ret != 0) { 3703 boolean_t printed = B_FALSE; 3704 for (elem = nvlist_next_nvpair(errors, NULL); 3705 elem != NULL; 3706 elem = nvlist_next_nvpair(errors, elem)) { 3707 (void) snprintf(errbuf, sizeof (errbuf), 3708 dgettext(TEXT_DOMAIN, 3709 "cannot create snapshot '%s'"), nvpair_name(elem)); 3710 (void) zfs_standard_error(hdl, 3711 fnvpair_value_int32(elem), errbuf); 3712 printed = B_TRUE; 3713 } 3714 if (!printed) { 3715 switch (ret) { 3716 case EXDEV: 3717 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3718 "multiple snapshots of same " 3719 "fs not allowed")); 3720 (void) zfs_error(hdl, EZFS_EXISTS, errbuf); 3721 3722 break; 3723 default: 3724 (void) zfs_standard_error(hdl, ret, errbuf); 3725 } 3726 } 3727 } 3728 3729 nvlist_free(props); 3730 nvlist_free(errors); 3731 return (ret); 3732 } 3733 3734 int 3735 zfs_snapshot(libzfs_handle_t *hdl, const char *path, boolean_t recursive, 3736 nvlist_t *props) 3737 { 3738 int ret; 3739 snapdata_t sd = { 0 }; 3740 char fsname[ZFS_MAX_DATASET_NAME_LEN]; 3741 char *cp; 3742 zfs_handle_t *zhp; 3743 char errbuf[1024]; 3744 3745 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3746 "cannot snapshot %s"), path); 3747 3748 if (!zfs_validate_name(hdl, path, ZFS_TYPE_SNAPSHOT, B_TRUE)) 3749 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3750 3751 (void) strlcpy(fsname, path, sizeof (fsname)); 3752 cp = strchr(fsname, '@'); 3753 *cp = '\0'; 3754 sd.sd_snapname = cp + 1; 3755 3756 if ((zhp = zfs_open(hdl, fsname, ZFS_TYPE_FILESYSTEM | 3757 ZFS_TYPE_VOLUME)) == NULL) { 3758 return (-1); 3759 } 3760 3761 verify(nvlist_alloc(&sd.sd_nvl, NV_UNIQUE_NAME, 0) == 0); 3762 if (recursive) { 3763 (void) zfs_snapshot_cb(zfs_handle_dup(zhp), &sd); 3764 } else { 3765 fnvlist_add_boolean(sd.sd_nvl, path); 3766 } 3767 3768 ret = zfs_snapshot_nvl(hdl, sd.sd_nvl, props); 3769 nvlist_free(sd.sd_nvl); 3770 zfs_close(zhp); 3771 return (ret); 3772 } 3773 3774 /* 3775 * Destroy any more recent snapshots. We invoke this callback on any dependents 3776 * of the snapshot first. If the 'cb_dependent' member is non-zero, then this 3777 * is a dependent and we should just destroy it without checking the transaction 3778 * group. 3779 */ 3780 typedef struct rollback_data { 3781 const char *cb_target; /* the snapshot */ 3782 uint64_t cb_create; /* creation time reference */ 3783 boolean_t cb_error; 3784 boolean_t cb_force; 3785 } rollback_data_t; 3786 3787 static int 3788 rollback_destroy_dependent(zfs_handle_t *zhp, void *data) 3789 { 3790 rollback_data_t *cbp = data; 3791 prop_changelist_t *clp; 3792 3793 /* We must destroy this clone; first unmount it */ 3794 clp = changelist_gather(zhp, ZFS_PROP_NAME, 0, 3795 cbp->cb_force ? MS_FORCE: 0); 3796 if (clp == NULL || changelist_prefix(clp) != 0) { 3797 cbp->cb_error = B_TRUE; 3798 zfs_close(zhp); 3799 return (0); 3800 } 3801 if (zfs_destroy(zhp, B_FALSE) != 0) 3802 cbp->cb_error = B_TRUE; 3803 else 3804 changelist_remove(clp, zhp->zfs_name); 3805 (void) changelist_postfix(clp); 3806 changelist_free(clp); 3807 3808 zfs_close(zhp); 3809 return (0); 3810 } 3811 3812 static int 3813 rollback_destroy(zfs_handle_t *zhp, void *data) 3814 { 3815 rollback_data_t *cbp = data; 3816 3817 if (zfs_prop_get_int(zhp, ZFS_PROP_CREATETXG) > cbp->cb_create) { 3818 cbp->cb_error |= zfs_iter_dependents(zhp, B_FALSE, 3819 rollback_destroy_dependent, cbp); 3820 3821 cbp->cb_error |= zfs_destroy(zhp, B_FALSE); 3822 } 3823 3824 zfs_close(zhp); 3825 return (0); 3826 } 3827 3828 /* 3829 * Given a dataset, rollback to a specific snapshot, discarding any 3830 * data changes since then and making it the active dataset. 3831 * 3832 * Any snapshots and bookmarks more recent than the target are 3833 * destroyed, along with their dependents (i.e. clones). 3834 */ 3835 int 3836 zfs_rollback(zfs_handle_t *zhp, zfs_handle_t *snap, boolean_t force) 3837 { 3838 rollback_data_t cb = { 0 }; 3839 int err; 3840 boolean_t restore_resv = 0; 3841 uint64_t old_volsize = 0, new_volsize; 3842 zfs_prop_t resv_prop; 3843 3844 assert(zhp->zfs_type == ZFS_TYPE_FILESYSTEM || 3845 zhp->zfs_type == ZFS_TYPE_VOLUME); 3846 3847 /* 3848 * Destroy all recent snapshots and their dependents. 3849 */ 3850 cb.cb_force = force; 3851 cb.cb_target = snap->zfs_name; 3852 cb.cb_create = zfs_prop_get_int(snap, ZFS_PROP_CREATETXG); 3853 (void) zfs_iter_snapshots(zhp, B_FALSE, rollback_destroy, &cb); 3854 (void) zfs_iter_bookmarks(zhp, rollback_destroy, &cb); 3855 3856 if (cb.cb_error) 3857 return (-1); 3858 3859 /* 3860 * Now that we have verified that the snapshot is the latest, 3861 * rollback to the given snapshot. 3862 */ 3863 3864 if (zhp->zfs_type == ZFS_TYPE_VOLUME) { 3865 if (zfs_which_resv_prop(zhp, &resv_prop) < 0) 3866 return (-1); 3867 old_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE); 3868 restore_resv = 3869 (old_volsize == zfs_prop_get_int(zhp, resv_prop)); 3870 } 3871 3872 /* 3873 * We rely on zfs_iter_children() to verify that there are no 3874 * newer snapshots for the given dataset. Therefore, we can 3875 * simply pass the name on to the ioctl() call. There is still 3876 * an unlikely race condition where the user has taken a 3877 * snapshot since we verified that this was the most recent. 3878 */ 3879 err = lzc_rollback(zhp->zfs_name, NULL, 0); 3880 if (err != 0) { 3881 (void) zfs_standard_error_fmt(zhp->zfs_hdl, errno, 3882 dgettext(TEXT_DOMAIN, "cannot rollback '%s'"), 3883 zhp->zfs_name); 3884 return (err); 3885 } 3886 3887 /* 3888 * For volumes, if the pre-rollback volsize matched the pre- 3889 * rollback reservation and the volsize has changed then set 3890 * the reservation property to the post-rollback volsize. 3891 * Make a new handle since the rollback closed the dataset. 3892 */ 3893 if ((zhp->zfs_type == ZFS_TYPE_VOLUME) && 3894 (zhp = make_dataset_handle(zhp->zfs_hdl, zhp->zfs_name))) { 3895 if (restore_resv) { 3896 new_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE); 3897 if (old_volsize != new_volsize) 3898 err = zfs_prop_set_int(zhp, resv_prop, 3899 new_volsize); 3900 } 3901 zfs_close(zhp); 3902 } 3903 return (err); 3904 } 3905 3906 /* 3907 * Renames the given dataset. 3908 */ 3909 int 3910 zfs_rename(zfs_handle_t *zhp, const char *source, const char *target, 3911 renameflags_t flags) 3912 { 3913 int ret = 0; 3914 zfs_cmd_t zc = { 0 }; 3915 char *delim; 3916 prop_changelist_t *cl = NULL; 3917 zfs_handle_t *zhrp = NULL; 3918 char *parentname = NULL; 3919 char parent[ZFS_MAX_DATASET_NAME_LEN]; 3920 char property[ZFS_MAXPROPLEN]; 3921 libzfs_handle_t *hdl = zhp->zfs_hdl; 3922 char errbuf[1024]; 3923 3924 /* if we have the same exact name, just return success */ 3925 if (strcmp(zhp->zfs_name, target) == 0) 3926 return (0); 3927 3928 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3929 "cannot rename to '%s'"), target); 3930 3931 if (source != NULL) { 3932 /* 3933 * This is recursive snapshots rename, put snapshot name 3934 * (that might not exist) into zfs_name. 3935 */ 3936 assert(flags.recurse); 3937 3938 (void) strlcat(zhp->zfs_name, "@", sizeof(zhp->zfs_name)); 3939 (void) strlcat(zhp->zfs_name, source, sizeof(zhp->zfs_name)); 3940 zhp->zfs_type = ZFS_TYPE_SNAPSHOT; 3941 } 3942 3943 /* 3944 * Make sure the target name is valid 3945 */ 3946 if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) { 3947 if ((strchr(target, '@') == NULL) || 3948 *target == '@') { 3949 /* 3950 * Snapshot target name is abbreviated, 3951 * reconstruct full dataset name 3952 */ 3953 (void) strlcpy(parent, zhp->zfs_name, 3954 sizeof (parent)); 3955 delim = strchr(parent, '@'); 3956 if (strchr(target, '@') == NULL) 3957 *(++delim) = '\0'; 3958 else 3959 *delim = '\0'; 3960 (void) strlcat(parent, target, sizeof (parent)); 3961 target = parent; 3962 } else { 3963 /* 3964 * Make sure we're renaming within the same dataset. 3965 */ 3966 delim = strchr(target, '@'); 3967 if (strncmp(zhp->zfs_name, target, delim - target) 3968 != 0 || zhp->zfs_name[delim - target] != '@') { 3969 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3970 "snapshots must be part of same " 3971 "dataset")); 3972 return (zfs_error(hdl, EZFS_CROSSTARGET, 3973 errbuf)); 3974 } 3975 } 3976 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE)) 3977 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3978 } else { 3979 if (flags.recurse) { 3980 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3981 "recursive rename must be a snapshot")); 3982 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 3983 } 3984 3985 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE)) 3986 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3987 3988 /* validate parents */ 3989 if (check_parents(hdl, target, NULL, B_FALSE, NULL) != 0) 3990 return (-1); 3991 3992 /* make sure we're in the same pool */ 3993 verify((delim = strchr(target, '/')) != NULL); 3994 if (strncmp(zhp->zfs_name, target, delim - target) != 0 || 3995 zhp->zfs_name[delim - target] != '/') { 3996 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3997 "datasets must be within same pool")); 3998 return (zfs_error(hdl, EZFS_CROSSTARGET, errbuf)); 3999 } 4000 4001 /* new name cannot be a child of the current dataset name */ 4002 if (is_descendant(zhp->zfs_name, target)) { 4003 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4004 "New dataset name cannot be a descendant of " 4005 "current dataset name")); 4006 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 4007 } 4008 } 4009 4010 (void) snprintf(errbuf, sizeof (errbuf), 4011 dgettext(TEXT_DOMAIN, "cannot rename '%s'"), zhp->zfs_name); 4012 4013 if (getzoneid() == GLOBAL_ZONEID && 4014 zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) { 4015 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4016 "dataset is used in a non-global zone")); 4017 return (zfs_error(hdl, EZFS_ZONED, errbuf)); 4018 } 4019 4020 /* 4021 * Avoid unmounting file systems with mountpoint property set to 4022 * 'legacy' or 'none' even if -u option is not given. 4023 */ 4024 if (zhp->zfs_type == ZFS_TYPE_FILESYSTEM && 4025 !flags.recurse && !flags.nounmount && 4026 zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, property, 4027 sizeof (property), NULL, NULL, 0, B_FALSE) == 0 && 4028 (strcmp(property, "legacy") == 0 || 4029 strcmp(property, "none") == 0)) { 4030 flags.nounmount = B_TRUE; 4031 } 4032 if (flags.recurse) { 4033 4034 parentname = zfs_strdup(zhp->zfs_hdl, zhp->zfs_name); 4035 if (parentname == NULL) { 4036 ret = -1; 4037 goto error; 4038 } 4039 delim = strchr(parentname, '@'); 4040 *delim = '\0'; 4041 zhrp = zfs_open(zhp->zfs_hdl, parentname, ZFS_TYPE_DATASET); 4042 if (zhrp == NULL) { 4043 ret = -1; 4044 goto error; 4045 } 4046 } else if (zhp->zfs_type != ZFS_TYPE_SNAPSHOT) { 4047 if ((cl = changelist_gather(zhp, ZFS_PROP_NAME, 4048 flags.nounmount ? CL_GATHER_DONT_UNMOUNT : 0, 4049 flags.forceunmount ? MS_FORCE : 0)) == NULL) { 4050 return (-1); 4051 } 4052 4053 if (changelist_haszonedchild(cl)) { 4054 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4055 "child dataset with inherited mountpoint is used " 4056 "in a non-global zone")); 4057 (void) zfs_error(hdl, EZFS_ZONED, errbuf); 4058 ret = -1; 4059 goto error; 4060 } 4061 4062 if ((ret = changelist_prefix(cl)) != 0) 4063 goto error; 4064 } 4065 4066 if (ZFS_IS_VOLUME(zhp)) 4067 zc.zc_objset_type = DMU_OST_ZVOL; 4068 else 4069 zc.zc_objset_type = DMU_OST_ZFS; 4070 4071 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 4072 (void) strlcpy(zc.zc_value, target, sizeof (zc.zc_value)); 4073 4074 zc.zc_cookie = flags.recurse ? 1 : 0; 4075 if (flags.nounmount) 4076 zc.zc_cookie |= 2; 4077 4078 if ((ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_RENAME, &zc)) != 0) { 4079 /* 4080 * if it was recursive, the one that actually failed will 4081 * be in zc.zc_name 4082 */ 4083 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 4084 "cannot rename '%s'"), zc.zc_name); 4085 4086 if (flags.recurse && errno == EEXIST) { 4087 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4088 "a child dataset already has a snapshot " 4089 "with the new name")); 4090 (void) zfs_error(hdl, EZFS_EXISTS, errbuf); 4091 } else { 4092 (void) zfs_standard_error(zhp->zfs_hdl, errno, errbuf); 4093 } 4094 4095 /* 4096 * On failure, we still want to remount any filesystems that 4097 * were previously mounted, so we don't alter the system state. 4098 */ 4099 if (cl != NULL) 4100 (void) changelist_postfix(cl); 4101 } else { 4102 if (cl != NULL) { 4103 changelist_rename(cl, zfs_get_name(zhp), target); 4104 ret = changelist_postfix(cl); 4105 } 4106 } 4107 4108 error: 4109 if (parentname != NULL) { 4110 free(parentname); 4111 } 4112 if (zhrp != NULL) { 4113 zfs_close(zhrp); 4114 } 4115 if (cl != NULL) { 4116 changelist_free(cl); 4117 } 4118 return (ret); 4119 } 4120 4121 nvlist_t * 4122 zfs_get_user_props(zfs_handle_t *zhp) 4123 { 4124 return (zhp->zfs_user_props); 4125 } 4126 4127 nvlist_t * 4128 zfs_get_recvd_props(zfs_handle_t *zhp) 4129 { 4130 if (zhp->zfs_recvd_props == NULL) 4131 if (get_recvd_props_ioctl(zhp) != 0) 4132 return (NULL); 4133 return (zhp->zfs_recvd_props); 4134 } 4135 4136 /* 4137 * This function is used by 'zfs list' to determine the exact set of columns to 4138 * display, and their maximum widths. This does two main things: 4139 * 4140 * - If this is a list of all properties, then expand the list to include 4141 * all native properties, and set a flag so that for each dataset we look 4142 * for new unique user properties and add them to the list. 4143 * 4144 * - For non fixed-width properties, keep track of the maximum width seen 4145 * so that we can size the column appropriately. If the user has 4146 * requested received property values, we also need to compute the width 4147 * of the RECEIVED column. 4148 */ 4149 int 4150 zfs_expand_proplist(zfs_handle_t *zhp, zprop_list_t **plp, boolean_t received, 4151 boolean_t literal) 4152 { 4153 libzfs_handle_t *hdl = zhp->zfs_hdl; 4154 zprop_list_t *entry; 4155 zprop_list_t **last, **start; 4156 nvlist_t *userprops, *propval; 4157 nvpair_t *elem; 4158 char *strval; 4159 char buf[ZFS_MAXPROPLEN]; 4160 4161 if (zprop_expand_list(hdl, plp, ZFS_TYPE_DATASET) != 0) 4162 return (-1); 4163 4164 userprops = zfs_get_user_props(zhp); 4165 4166 entry = *plp; 4167 if (entry->pl_all && nvlist_next_nvpair(userprops, NULL) != NULL) { 4168 /* 4169 * Go through and add any user properties as necessary. We 4170 * start by incrementing our list pointer to the first 4171 * non-native property. 4172 */ 4173 start = plp; 4174 while (*start != NULL) { 4175 if ((*start)->pl_prop == ZPROP_INVAL) 4176 break; 4177 start = &(*start)->pl_next; 4178 } 4179 4180 elem = NULL; 4181 while ((elem = nvlist_next_nvpair(userprops, elem)) != NULL) { 4182 /* 4183 * See if we've already found this property in our list. 4184 */ 4185 for (last = start; *last != NULL; 4186 last = &(*last)->pl_next) { 4187 if (strcmp((*last)->pl_user_prop, 4188 nvpair_name(elem)) == 0) 4189 break; 4190 } 4191 4192 if (*last == NULL) { 4193 if ((entry = zfs_alloc(hdl, 4194 sizeof (zprop_list_t))) == NULL || 4195 ((entry->pl_user_prop = zfs_strdup(hdl, 4196 nvpair_name(elem)))) == NULL) { 4197 free(entry); 4198 return (-1); 4199 } 4200 4201 entry->pl_prop = ZPROP_INVAL; 4202 entry->pl_width = strlen(nvpair_name(elem)); 4203 entry->pl_all = B_TRUE; 4204 *last = entry; 4205 } 4206 } 4207 } 4208 4209 /* 4210 * Now go through and check the width of any non-fixed columns 4211 */ 4212 for (entry = *plp; entry != NULL; entry = entry->pl_next) { 4213 if (entry->pl_fixed && !literal) 4214 continue; 4215 4216 if (entry->pl_prop != ZPROP_INVAL) { 4217 if (zfs_prop_get(zhp, entry->pl_prop, 4218 buf, sizeof (buf), NULL, NULL, 0, literal) == 0) { 4219 if (strlen(buf) > entry->pl_width) 4220 entry->pl_width = strlen(buf); 4221 } 4222 if (received && zfs_prop_get_recvd(zhp, 4223 zfs_prop_to_name(entry->pl_prop), 4224 buf, sizeof (buf), literal) == 0) 4225 if (strlen(buf) > entry->pl_recvd_width) 4226 entry->pl_recvd_width = strlen(buf); 4227 } else { 4228 if (nvlist_lookup_nvlist(userprops, entry->pl_user_prop, 4229 &propval) == 0) { 4230 verify(nvlist_lookup_string(propval, 4231 ZPROP_VALUE, &strval) == 0); 4232 if (strlen(strval) > entry->pl_width) 4233 entry->pl_width = strlen(strval); 4234 } 4235 if (received && zfs_prop_get_recvd(zhp, 4236 entry->pl_user_prop, 4237 buf, sizeof (buf), literal) == 0) 4238 if (strlen(buf) > entry->pl_recvd_width) 4239 entry->pl_recvd_width = strlen(buf); 4240 } 4241 } 4242 4243 return (0); 4244 } 4245 4246 int 4247 zfs_deleg_share_nfs(libzfs_handle_t *hdl, char *dataset, char *path, 4248 char *resource, void *export, void *sharetab, 4249 int sharemax, zfs_share_op_t operation) 4250 { 4251 zfs_cmd_t zc = { 0 }; 4252 int error; 4253 4254 (void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name)); 4255 (void) strlcpy(zc.zc_value, path, sizeof (zc.zc_value)); 4256 if (resource) 4257 (void) strlcpy(zc.zc_string, resource, sizeof (zc.zc_string)); 4258 zc.zc_share.z_sharedata = (uint64_t)(uintptr_t)sharetab; 4259 zc.zc_share.z_exportdata = (uint64_t)(uintptr_t)export; 4260 zc.zc_share.z_sharetype = operation; 4261 zc.zc_share.z_sharemax = sharemax; 4262 error = ioctl(hdl->libzfs_fd, ZFS_IOC_SHARE, &zc); 4263 return (error); 4264 } 4265 4266 void 4267 zfs_prune_proplist(zfs_handle_t *zhp, uint8_t *props) 4268 { 4269 nvpair_t *curr; 4270 4271 /* 4272 * Keep a reference to the props-table against which we prune the 4273 * properties. 4274 */ 4275 zhp->zfs_props_table = props; 4276 4277 curr = nvlist_next_nvpair(zhp->zfs_props, NULL); 4278 4279 while (curr) { 4280 zfs_prop_t zfs_prop = zfs_name_to_prop(nvpair_name(curr)); 4281 nvpair_t *next = nvlist_next_nvpair(zhp->zfs_props, curr); 4282 4283 /* 4284 * User properties will result in ZPROP_INVAL, and since we 4285 * only know how to prune standard ZFS properties, we always 4286 * leave these in the list. This can also happen if we 4287 * encounter an unknown DSL property (when running older 4288 * software, for example). 4289 */ 4290 if (zfs_prop != ZPROP_INVAL && props[zfs_prop] == B_FALSE) 4291 (void) nvlist_remove(zhp->zfs_props, 4292 nvpair_name(curr), nvpair_type(curr)); 4293 curr = next; 4294 } 4295 } 4296 4297 #ifdef illumos 4298 static int 4299 zfs_smb_acl_mgmt(libzfs_handle_t *hdl, char *dataset, char *path, 4300 zfs_smb_acl_op_t cmd, char *resource1, char *resource2) 4301 { 4302 zfs_cmd_t zc = { 0 }; 4303 nvlist_t *nvlist = NULL; 4304 int error; 4305 4306 (void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name)); 4307 (void) strlcpy(zc.zc_value, path, sizeof (zc.zc_value)); 4308 zc.zc_cookie = (uint64_t)cmd; 4309 4310 if (cmd == ZFS_SMB_ACL_RENAME) { 4311 if (nvlist_alloc(&nvlist, NV_UNIQUE_NAME, 0) != 0) { 4312 (void) no_memory(hdl); 4313 return (0); 4314 } 4315 } 4316 4317 switch (cmd) { 4318 case ZFS_SMB_ACL_ADD: 4319 case ZFS_SMB_ACL_REMOVE: 4320 (void) strlcpy(zc.zc_string, resource1, sizeof (zc.zc_string)); 4321 break; 4322 case ZFS_SMB_ACL_RENAME: 4323 if (nvlist_add_string(nvlist, ZFS_SMB_ACL_SRC, 4324 resource1) != 0) { 4325 (void) no_memory(hdl); 4326 return (-1); 4327 } 4328 if (nvlist_add_string(nvlist, ZFS_SMB_ACL_TARGET, 4329 resource2) != 0) { 4330 (void) no_memory(hdl); 4331 return (-1); 4332 } 4333 if (zcmd_write_src_nvlist(hdl, &zc, nvlist) != 0) { 4334 nvlist_free(nvlist); 4335 return (-1); 4336 } 4337 break; 4338 case ZFS_SMB_ACL_PURGE: 4339 break; 4340 default: 4341 return (-1); 4342 } 4343 error = ioctl(hdl->libzfs_fd, ZFS_IOC_SMB_ACL, &zc); 4344 nvlist_free(nvlist); 4345 return (error); 4346 } 4347 4348 int 4349 zfs_smb_acl_add(libzfs_handle_t *hdl, char *dataset, 4350 char *path, char *resource) 4351 { 4352 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_ADD, 4353 resource, NULL)); 4354 } 4355 4356 int 4357 zfs_smb_acl_remove(libzfs_handle_t *hdl, char *dataset, 4358 char *path, char *resource) 4359 { 4360 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_REMOVE, 4361 resource, NULL)); 4362 } 4363 4364 int 4365 zfs_smb_acl_purge(libzfs_handle_t *hdl, char *dataset, char *path) 4366 { 4367 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_PURGE, 4368 NULL, NULL)); 4369 } 4370 4371 int 4372 zfs_smb_acl_rename(libzfs_handle_t *hdl, char *dataset, char *path, 4373 char *oldname, char *newname) 4374 { 4375 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_RENAME, 4376 oldname, newname)); 4377 } 4378 #endif /* illumos */ 4379 4380 int 4381 zfs_userspace(zfs_handle_t *zhp, zfs_userquota_prop_t type, 4382 zfs_userspace_cb_t func, void *arg) 4383 { 4384 zfs_cmd_t zc = { 0 }; 4385 zfs_useracct_t buf[100]; 4386 libzfs_handle_t *hdl = zhp->zfs_hdl; 4387 int ret; 4388 4389 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 4390 4391 zc.zc_objset_type = type; 4392 zc.zc_nvlist_dst = (uintptr_t)buf; 4393 4394 for (;;) { 4395 zfs_useracct_t *zua = buf; 4396 4397 zc.zc_nvlist_dst_size = sizeof (buf); 4398 if (zfs_ioctl(hdl, ZFS_IOC_USERSPACE_MANY, &zc) != 0) { 4399 char errbuf[1024]; 4400 4401 (void) snprintf(errbuf, sizeof (errbuf), 4402 dgettext(TEXT_DOMAIN, 4403 "cannot get used/quota for %s"), zc.zc_name); 4404 return (zfs_standard_error_fmt(hdl, errno, errbuf)); 4405 } 4406 if (zc.zc_nvlist_dst_size == 0) 4407 break; 4408 4409 while (zc.zc_nvlist_dst_size > 0) { 4410 if ((ret = func(arg, zua->zu_domain, zua->zu_rid, 4411 zua->zu_space)) != 0) 4412 return (ret); 4413 zua++; 4414 zc.zc_nvlist_dst_size -= sizeof (zfs_useracct_t); 4415 } 4416 } 4417 4418 return (0); 4419 } 4420 4421 struct holdarg { 4422 nvlist_t *nvl; 4423 const char *snapname; 4424 const char *tag; 4425 boolean_t recursive; 4426 int error; 4427 }; 4428 4429 static int 4430 zfs_hold_one(zfs_handle_t *zhp, void *arg) 4431 { 4432 struct holdarg *ha = arg; 4433 char name[ZFS_MAX_DATASET_NAME_LEN]; 4434 int rv = 0; 4435 4436 (void) snprintf(name, sizeof (name), 4437 "%s@%s", zhp->zfs_name, ha->snapname); 4438 4439 if (lzc_exists(name)) 4440 fnvlist_add_string(ha->nvl, name, ha->tag); 4441 4442 if (ha->recursive) 4443 rv = zfs_iter_filesystems(zhp, zfs_hold_one, ha); 4444 zfs_close(zhp); 4445 return (rv); 4446 } 4447 4448 int 4449 zfs_hold(zfs_handle_t *zhp, const char *snapname, const char *tag, 4450 boolean_t recursive, int cleanup_fd) 4451 { 4452 int ret; 4453 struct holdarg ha; 4454 4455 ha.nvl = fnvlist_alloc(); 4456 ha.snapname = snapname; 4457 ha.tag = tag; 4458 ha.recursive = recursive; 4459 (void) zfs_hold_one(zfs_handle_dup(zhp), &ha); 4460 4461 if (nvlist_empty(ha.nvl)) { 4462 char errbuf[1024]; 4463 4464 fnvlist_free(ha.nvl); 4465 ret = ENOENT; 4466 (void) snprintf(errbuf, sizeof (errbuf), 4467 dgettext(TEXT_DOMAIN, 4468 "cannot hold snapshot '%s@%s'"), 4469 zhp->zfs_name, snapname); 4470 (void) zfs_standard_error(zhp->zfs_hdl, ret, errbuf); 4471 return (ret); 4472 } 4473 4474 ret = zfs_hold_nvl(zhp, cleanup_fd, ha.nvl); 4475 fnvlist_free(ha.nvl); 4476 4477 return (ret); 4478 } 4479 4480 int 4481 zfs_hold_nvl(zfs_handle_t *zhp, int cleanup_fd, nvlist_t *holds) 4482 { 4483 int ret; 4484 nvlist_t *errors; 4485 libzfs_handle_t *hdl = zhp->zfs_hdl; 4486 char errbuf[1024]; 4487 nvpair_t *elem; 4488 4489 errors = NULL; 4490 ret = lzc_hold(holds, cleanup_fd, &errors); 4491 4492 if (ret == 0) { 4493 /* There may be errors even in the success case. */ 4494 fnvlist_free(errors); 4495 return (0); 4496 } 4497 4498 if (nvlist_empty(errors)) { 4499 /* no hold-specific errors */ 4500 (void) snprintf(errbuf, sizeof (errbuf), 4501 dgettext(TEXT_DOMAIN, "cannot hold")); 4502 switch (ret) { 4503 case ENOTSUP: 4504 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4505 "pool must be upgraded")); 4506 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf); 4507 break; 4508 case EINVAL: 4509 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf); 4510 break; 4511 default: 4512 (void) zfs_standard_error(hdl, ret, errbuf); 4513 } 4514 } 4515 4516 for (elem = nvlist_next_nvpair(errors, NULL); 4517 elem != NULL; 4518 elem = nvlist_next_nvpair(errors, elem)) { 4519 (void) snprintf(errbuf, sizeof (errbuf), 4520 dgettext(TEXT_DOMAIN, 4521 "cannot hold snapshot '%s'"), nvpair_name(elem)); 4522 switch (fnvpair_value_int32(elem)) { 4523 case E2BIG: 4524 /* 4525 * Temporary tags wind up having the ds object id 4526 * prepended. So even if we passed the length check 4527 * above, it's still possible for the tag to wind 4528 * up being slightly too long. 4529 */ 4530 (void) zfs_error(hdl, EZFS_TAGTOOLONG, errbuf); 4531 break; 4532 case EINVAL: 4533 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf); 4534 break; 4535 case EEXIST: 4536 (void) zfs_error(hdl, EZFS_REFTAG_HOLD, errbuf); 4537 break; 4538 default: 4539 (void) zfs_standard_error(hdl, 4540 fnvpair_value_int32(elem), errbuf); 4541 } 4542 } 4543 4544 fnvlist_free(errors); 4545 return (ret); 4546 } 4547 4548 static int 4549 zfs_release_one(zfs_handle_t *zhp, void *arg) 4550 { 4551 struct holdarg *ha = arg; 4552 char name[ZFS_MAX_DATASET_NAME_LEN]; 4553 int rv = 0; 4554 nvlist_t *existing_holds; 4555 4556 (void) snprintf(name, sizeof (name), 4557 "%s@%s", zhp->zfs_name, ha->snapname); 4558 4559 if (lzc_get_holds(name, &existing_holds) != 0) { 4560 ha->error = ENOENT; 4561 } else if (!nvlist_exists(existing_holds, ha->tag)) { 4562 ha->error = ESRCH; 4563 } else { 4564 nvlist_t *torelease = fnvlist_alloc(); 4565 fnvlist_add_boolean(torelease, ha->tag); 4566 fnvlist_add_nvlist(ha->nvl, name, torelease); 4567 fnvlist_free(torelease); 4568 } 4569 4570 if (ha->recursive) 4571 rv = zfs_iter_filesystems(zhp, zfs_release_one, ha); 4572 zfs_close(zhp); 4573 return (rv); 4574 } 4575 4576 int 4577 zfs_release(zfs_handle_t *zhp, const char *snapname, const char *tag, 4578 boolean_t recursive) 4579 { 4580 int ret; 4581 struct holdarg ha; 4582 nvlist_t *errors = NULL; 4583 nvpair_t *elem; 4584 libzfs_handle_t *hdl = zhp->zfs_hdl; 4585 char errbuf[1024]; 4586 4587 ha.nvl = fnvlist_alloc(); 4588 ha.snapname = snapname; 4589 ha.tag = tag; 4590 ha.recursive = recursive; 4591 ha.error = 0; 4592 (void) zfs_release_one(zfs_handle_dup(zhp), &ha); 4593 4594 if (nvlist_empty(ha.nvl)) { 4595 fnvlist_free(ha.nvl); 4596 ret = ha.error; 4597 (void) snprintf(errbuf, sizeof (errbuf), 4598 dgettext(TEXT_DOMAIN, 4599 "cannot release hold from snapshot '%s@%s'"), 4600 zhp->zfs_name, snapname); 4601 if (ret == ESRCH) { 4602 (void) zfs_error(hdl, EZFS_REFTAG_RELE, errbuf); 4603 } else { 4604 (void) zfs_standard_error(hdl, ret, errbuf); 4605 } 4606 return (ret); 4607 } 4608 4609 ret = lzc_release(ha.nvl, &errors); 4610 fnvlist_free(ha.nvl); 4611 4612 if (ret == 0) { 4613 /* There may be errors even in the success case. */ 4614 fnvlist_free(errors); 4615 return (0); 4616 } 4617 4618 if (nvlist_empty(errors)) { 4619 /* no hold-specific errors */ 4620 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 4621 "cannot release")); 4622 switch (errno) { 4623 case ENOTSUP: 4624 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4625 "pool must be upgraded")); 4626 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf); 4627 break; 4628 default: 4629 (void) zfs_standard_error_fmt(hdl, errno, errbuf); 4630 } 4631 } 4632 4633 for (elem = nvlist_next_nvpair(errors, NULL); 4634 elem != NULL; 4635 elem = nvlist_next_nvpair(errors, elem)) { 4636 (void) snprintf(errbuf, sizeof (errbuf), 4637 dgettext(TEXT_DOMAIN, 4638 "cannot release hold from snapshot '%s'"), 4639 nvpair_name(elem)); 4640 switch (fnvpair_value_int32(elem)) { 4641 case ESRCH: 4642 (void) zfs_error(hdl, EZFS_REFTAG_RELE, errbuf); 4643 break; 4644 case EINVAL: 4645 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf); 4646 break; 4647 default: 4648 (void) zfs_standard_error_fmt(hdl, 4649 fnvpair_value_int32(elem), errbuf); 4650 } 4651 } 4652 4653 fnvlist_free(errors); 4654 return (ret); 4655 } 4656 4657 int 4658 zfs_get_fsacl(zfs_handle_t *zhp, nvlist_t **nvl) 4659 { 4660 zfs_cmd_t zc = { 0 }; 4661 libzfs_handle_t *hdl = zhp->zfs_hdl; 4662 int nvsz = 2048; 4663 void *nvbuf; 4664 int err = 0; 4665 char errbuf[1024]; 4666 4667 assert(zhp->zfs_type == ZFS_TYPE_VOLUME || 4668 zhp->zfs_type == ZFS_TYPE_FILESYSTEM); 4669 4670 tryagain: 4671 4672 nvbuf = malloc(nvsz); 4673 if (nvbuf == NULL) { 4674 err = (zfs_error(hdl, EZFS_NOMEM, strerror(errno))); 4675 goto out; 4676 } 4677 4678 zc.zc_nvlist_dst_size = nvsz; 4679 zc.zc_nvlist_dst = (uintptr_t)nvbuf; 4680 4681 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 4682 4683 if (ioctl(hdl->libzfs_fd, ZFS_IOC_GET_FSACL, &zc) != 0) { 4684 (void) snprintf(errbuf, sizeof (errbuf), 4685 dgettext(TEXT_DOMAIN, "cannot get permissions on '%s'"), 4686 zc.zc_name); 4687 switch (errno) { 4688 case ENOMEM: 4689 free(nvbuf); 4690 nvsz = zc.zc_nvlist_dst_size; 4691 goto tryagain; 4692 4693 case ENOTSUP: 4694 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4695 "pool must be upgraded")); 4696 err = zfs_error(hdl, EZFS_BADVERSION, errbuf); 4697 break; 4698 case EINVAL: 4699 err = zfs_error(hdl, EZFS_BADTYPE, errbuf); 4700 break; 4701 case ENOENT: 4702 err = zfs_error(hdl, EZFS_NOENT, errbuf); 4703 break; 4704 default: 4705 err = zfs_standard_error_fmt(hdl, errno, errbuf); 4706 break; 4707 } 4708 } else { 4709 /* success */ 4710 int rc = nvlist_unpack(nvbuf, zc.zc_nvlist_dst_size, nvl, 0); 4711 if (rc) { 4712 (void) snprintf(errbuf, sizeof (errbuf), dgettext( 4713 TEXT_DOMAIN, "cannot get permissions on '%s'"), 4714 zc.zc_name); 4715 err = zfs_standard_error_fmt(hdl, rc, errbuf); 4716 } 4717 } 4718 4719 free(nvbuf); 4720 out: 4721 return (err); 4722 } 4723 4724 int 4725 zfs_set_fsacl(zfs_handle_t *zhp, boolean_t un, nvlist_t *nvl) 4726 { 4727 zfs_cmd_t zc = { 0 }; 4728 libzfs_handle_t *hdl = zhp->zfs_hdl; 4729 char *nvbuf; 4730 char errbuf[1024]; 4731 size_t nvsz; 4732 int err; 4733 4734 assert(zhp->zfs_type == ZFS_TYPE_VOLUME || 4735 zhp->zfs_type == ZFS_TYPE_FILESYSTEM); 4736 4737 err = nvlist_size(nvl, &nvsz, NV_ENCODE_NATIVE); 4738 assert(err == 0); 4739 4740 nvbuf = malloc(nvsz); 4741 4742 err = nvlist_pack(nvl, &nvbuf, &nvsz, NV_ENCODE_NATIVE, 0); 4743 assert(err == 0); 4744 4745 zc.zc_nvlist_src_size = nvsz; 4746 zc.zc_nvlist_src = (uintptr_t)nvbuf; 4747 zc.zc_perm_action = un; 4748 4749 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 4750 4751 if (zfs_ioctl(hdl, ZFS_IOC_SET_FSACL, &zc) != 0) { 4752 (void) snprintf(errbuf, sizeof (errbuf), 4753 dgettext(TEXT_DOMAIN, "cannot set permissions on '%s'"), 4754 zc.zc_name); 4755 switch (errno) { 4756 case ENOTSUP: 4757 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4758 "pool must be upgraded")); 4759 err = zfs_error(hdl, EZFS_BADVERSION, errbuf); 4760 break; 4761 case EINVAL: 4762 err = zfs_error(hdl, EZFS_BADTYPE, errbuf); 4763 break; 4764 case ENOENT: 4765 err = zfs_error(hdl, EZFS_NOENT, errbuf); 4766 break; 4767 default: 4768 err = zfs_standard_error_fmt(hdl, errno, errbuf); 4769 break; 4770 } 4771 } 4772 4773 free(nvbuf); 4774 4775 return (err); 4776 } 4777 4778 int 4779 zfs_get_holds(zfs_handle_t *zhp, nvlist_t **nvl) 4780 { 4781 int err; 4782 char errbuf[1024]; 4783 4784 err = lzc_get_holds(zhp->zfs_name, nvl); 4785 4786 if (err != 0) { 4787 libzfs_handle_t *hdl = zhp->zfs_hdl; 4788 4789 (void) snprintf(errbuf, sizeof (errbuf), 4790 dgettext(TEXT_DOMAIN, "cannot get holds for '%s'"), 4791 zhp->zfs_name); 4792 switch (err) { 4793 case ENOTSUP: 4794 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4795 "pool must be upgraded")); 4796 err = zfs_error(hdl, EZFS_BADVERSION, errbuf); 4797 break; 4798 case EINVAL: 4799 err = zfs_error(hdl, EZFS_BADTYPE, errbuf); 4800 break; 4801 case ENOENT: 4802 err = zfs_error(hdl, EZFS_NOENT, errbuf); 4803 break; 4804 default: 4805 err = zfs_standard_error_fmt(hdl, errno, errbuf); 4806 break; 4807 } 4808 } 4809 4810 return (err); 4811 } 4812 4813 /* 4814 * Convert the zvol's volume size to an appropriate reservation. 4815 * Note: If this routine is updated, it is necessary to update the ZFS test 4816 * suite's shell version in reservation.kshlib. 4817 */ 4818 uint64_t 4819 zvol_volsize_to_reservation(uint64_t volsize, nvlist_t *props) 4820 { 4821 uint64_t numdb; 4822 uint64_t nblocks, volblocksize; 4823 int ncopies; 4824 char *strval; 4825 4826 if (nvlist_lookup_string(props, 4827 zfs_prop_to_name(ZFS_PROP_COPIES), &strval) == 0) 4828 ncopies = atoi(strval); 4829 else 4830 ncopies = 1; 4831 if (nvlist_lookup_uint64(props, 4832 zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE), 4833 &volblocksize) != 0) 4834 volblocksize = ZVOL_DEFAULT_BLOCKSIZE; 4835 nblocks = volsize/volblocksize; 4836 /* start with metadnode L0-L6 */ 4837 numdb = 7; 4838 /* calculate number of indirects */ 4839 while (nblocks > 1) { 4840 nblocks += DNODES_PER_LEVEL - 1; 4841 nblocks /= DNODES_PER_LEVEL; 4842 numdb += nblocks; 4843 } 4844 numdb *= MIN(SPA_DVAS_PER_BP, ncopies + 1); 4845 volsize *= ncopies; 4846 /* 4847 * this is exactly DN_MAX_INDBLKSHIFT when metadata isn't 4848 * compressed, but in practice they compress down to about 4849 * 1100 bytes 4850 */ 4851 numdb *= 1ULL << DN_MAX_INDBLKSHIFT; 4852 volsize += numdb; 4853 return (volsize); 4854 } 4855 4856 /* 4857 * Attach/detach the given filesystem to/from the given jail. 4858 */ 4859 int 4860 zfs_jail(zfs_handle_t *zhp, int jailid, int attach) 4861 { 4862 libzfs_handle_t *hdl = zhp->zfs_hdl; 4863 zfs_cmd_t zc = { 0 }; 4864 char errbuf[1024]; 4865 unsigned long cmd; 4866 int ret; 4867 4868 if (attach) { 4869 (void) snprintf(errbuf, sizeof (errbuf), 4870 dgettext(TEXT_DOMAIN, "cannot jail '%s'"), zhp->zfs_name); 4871 } else { 4872 (void) snprintf(errbuf, sizeof (errbuf), 4873 dgettext(TEXT_DOMAIN, "cannot unjail '%s'"), zhp->zfs_name); 4874 } 4875 4876 switch (zhp->zfs_type) { 4877 case ZFS_TYPE_VOLUME: 4878 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4879 "volumes can not be jailed")); 4880 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 4881 case ZFS_TYPE_SNAPSHOT: 4882 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4883 "snapshots can not be jailed")); 4884 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 4885 } 4886 assert(zhp->zfs_type == ZFS_TYPE_FILESYSTEM); 4887 4888 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 4889 zc.zc_objset_type = DMU_OST_ZFS; 4890 zc.zc_jailid = jailid; 4891 4892 cmd = attach ? ZFS_IOC_JAIL : ZFS_IOC_UNJAIL; 4893 if ((ret = ioctl(hdl->libzfs_fd, cmd, &zc)) != 0) 4894 zfs_standard_error(hdl, errno, errbuf); 4895 4896 return (ret); 4897 } 4898
Indexes created Sun Mar 15 00:25:29 UTC 2026