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 2019 Joyent, Inc. 25 * Copyright (c) 2011, 2020 by Delphix. All rights reserved. 26 * Copyright (c) 2012 DEY Storage Systems, Inc. All rights reserved. 27 * Copyright (c) 2012 Pawel Jakub Dawidek <pawel@dawidek.net>. 28 * Copyright (c) 2013 Martin Matuska. All rights reserved. 29 * Copyright (c) 2013 Steven Hartland. All rights reserved. 30 * Copyright 2017 Nexenta Systems, Inc. 31 * Copyright 2016 Igor Kozhukhov <ikozhukhov@gmail.com> 32 * Copyright 2017-2018 RackTop Systems. 33 * Copyright (c) 2019 Datto Inc. 34 * Copyright (c) 2019, loli10K <ezomori.nozomu@gmail.com> 35 */ 36 37 #include <ctype.h> 38 #include <errno.h> 39 #include <libintl.h> 40 #include <stdio.h> 41 #include <stdlib.h> 42 #include <strings.h> 43 #include <unistd.h> 44 #include <stddef.h> 45 #include <zone.h> 46 #include <fcntl.h> 47 #include <sys/mntent.h> 48 #include <sys/mount.h> 49 #include <pwd.h> 50 #include <grp.h> 51 #include <stddef.h> 52 #include <ucred.h> 53 #ifdef HAVE_IDMAP 54 #include <idmap.h> 55 #include <aclutils.h> 56 #include <directory.h> 57 #endif /* HAVE_IDMAP */ 58 59 #include <sys/dnode.h> 60 #include <sys/spa.h> 61 #include <sys/zap.h> 62 #include <sys/dsl_crypt.h> 63 #include <libzfs.h> 64 #include <libzutil.h> 65 66 #include "zfs_namecheck.h" 67 #include "zfs_prop.h" 68 #include "libzfs_impl.h" 69 #include "libzfs.h" 70 #include "zfs_deleg.h" 71 72 static int userquota_propname_decode(const char *propname, boolean_t zoned, 73 zfs_userquota_prop_t *typep, char *domain, int domainlen, uint64_t *ridp); 74 75 /* 76 * Given a single type (not a mask of types), return the type in a human 77 * readable form. 78 */ 79 const char * 80 zfs_type_to_name(zfs_type_t type) 81 { 82 switch (type) { 83 case ZFS_TYPE_FILESYSTEM: 84 return (dgettext(TEXT_DOMAIN, "filesystem")); 85 case ZFS_TYPE_SNAPSHOT: 86 return (dgettext(TEXT_DOMAIN, "snapshot")); 87 case ZFS_TYPE_VOLUME: 88 return (dgettext(TEXT_DOMAIN, "volume")); 89 case ZFS_TYPE_POOL: 90 return (dgettext(TEXT_DOMAIN, "pool")); 91 case ZFS_TYPE_BOOKMARK: 92 return (dgettext(TEXT_DOMAIN, "bookmark")); 93 default: 94 assert(!"unhandled zfs_type_t"); 95 } 96 97 return (NULL); 98 } 99 100 /* 101 * Validate a ZFS path. This is used even before trying to open the dataset, to 102 * provide a more meaningful error message. We call zfs_error_aux() to 103 * explain exactly why the name was not valid. 104 */ 105 int 106 zfs_validate_name(libzfs_handle_t *hdl, const char *path, int type, 107 boolean_t modifying) 108 { 109 namecheck_err_t why; 110 char what; 111 112 if (!(type & ZFS_TYPE_SNAPSHOT) && strchr(path, '@') != NULL) { 113 if (hdl != NULL) 114 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 115 "snapshot delimiter '@' is not expected here")); 116 return (0); 117 } 118 119 if (type == ZFS_TYPE_SNAPSHOT && strchr(path, '@') == NULL) { 120 if (hdl != NULL) 121 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 122 "missing '@' delimiter in snapshot name")); 123 return (0); 124 } 125 126 if (!(type & ZFS_TYPE_BOOKMARK) && strchr(path, '#') != NULL) { 127 if (hdl != NULL) 128 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 129 "bookmark delimiter '#' is not expected here")); 130 return (0); 131 } 132 133 if (type == ZFS_TYPE_BOOKMARK && strchr(path, '#') == NULL) { 134 if (hdl != NULL) 135 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 136 "missing '#' delimiter in bookmark name")); 137 return (0); 138 } 139 140 if (modifying && strchr(path, '%') != NULL) { 141 if (hdl != NULL) 142 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 143 "invalid character %c in name"), '%'); 144 return (0); 145 } 146 147 if (entity_namecheck(path, &why, &what) != 0) { 148 if (hdl != NULL) { 149 switch (why) { 150 case NAME_ERR_TOOLONG: 151 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 152 "name is too long")); 153 break; 154 155 case NAME_ERR_LEADING_SLASH: 156 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 157 "leading slash in name")); 158 break; 159 160 case NAME_ERR_EMPTY_COMPONENT: 161 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 162 "empty component or misplaced '@'" 163 " or '#' delimiter in name")); 164 break; 165 166 case NAME_ERR_TRAILING_SLASH: 167 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 168 "trailing slash in name")); 169 break; 170 171 case NAME_ERR_INVALCHAR: 172 zfs_error_aux(hdl, 173 dgettext(TEXT_DOMAIN, "invalid character " 174 "'%c' in name"), what); 175 break; 176 177 case NAME_ERR_MULTIPLE_DELIMITERS: 178 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 179 "multiple '@' and/or '#' delimiters in " 180 "name")); 181 break; 182 183 case NAME_ERR_NOLETTER: 184 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 185 "pool doesn't begin with a letter")); 186 break; 187 188 case NAME_ERR_RESERVED: 189 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 190 "name is reserved")); 191 break; 192 193 case NAME_ERR_DISKLIKE: 194 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 195 "reserved disk name")); 196 break; 197 198 case NAME_ERR_SELF_REF: 199 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 200 "self reference, '.' is found in name")); 201 break; 202 203 case NAME_ERR_PARENT_REF: 204 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 205 "parent reference, '..' is found in name")); 206 break; 207 208 default: 209 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 210 "(%d) not defined"), why); 211 break; 212 } 213 } 214 215 return (0); 216 } 217 218 return (-1); 219 } 220 221 int 222 zfs_name_valid(const char *name, zfs_type_t type) 223 { 224 if (type == ZFS_TYPE_POOL) 225 return (zpool_name_valid(NULL, B_FALSE, name)); 226 return (zfs_validate_name(NULL, name, type, B_FALSE)); 227 } 228 229 /* 230 * This function takes the raw DSL properties, and filters out the user-defined 231 * properties into a separate nvlist. 232 */ 233 static nvlist_t * 234 process_user_props(zfs_handle_t *zhp, nvlist_t *props) 235 { 236 libzfs_handle_t *hdl = zhp->zfs_hdl; 237 nvpair_t *elem; 238 nvlist_t *propval; 239 nvlist_t *nvl; 240 241 if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0) { 242 (void) no_memory(hdl); 243 return (NULL); 244 } 245 246 elem = NULL; 247 while ((elem = nvlist_next_nvpair(props, elem)) != NULL) { 248 if (!zfs_prop_user(nvpair_name(elem))) 249 continue; 250 251 verify(nvpair_value_nvlist(elem, &propval) == 0); 252 if (nvlist_add_nvlist(nvl, nvpair_name(elem), propval) != 0) { 253 nvlist_free(nvl); 254 (void) no_memory(hdl); 255 return (NULL); 256 } 257 } 258 259 return (nvl); 260 } 261 262 static zpool_handle_t * 263 zpool_add_handle(zfs_handle_t *zhp, const char *pool_name) 264 { 265 libzfs_handle_t *hdl = zhp->zfs_hdl; 266 zpool_handle_t *zph; 267 268 if ((zph = zpool_open_canfail(hdl, pool_name)) != NULL) { 269 if (hdl->libzfs_pool_handles != NULL) 270 zph->zpool_next = hdl->libzfs_pool_handles; 271 hdl->libzfs_pool_handles = zph; 272 } 273 return (zph); 274 } 275 276 static zpool_handle_t * 277 zpool_find_handle(zfs_handle_t *zhp, const char *pool_name, int len) 278 { 279 libzfs_handle_t *hdl = zhp->zfs_hdl; 280 zpool_handle_t *zph = hdl->libzfs_pool_handles; 281 282 while ((zph != NULL) && 283 (strncmp(pool_name, zpool_get_name(zph), len) != 0)) 284 zph = zph->zpool_next; 285 return (zph); 286 } 287 288 /* 289 * Returns a handle to the pool that contains the provided dataset. 290 * If a handle to that pool already exists then that handle is returned. 291 * Otherwise, a new handle is created and added to the list of handles. 292 */ 293 static zpool_handle_t * 294 zpool_handle(zfs_handle_t *zhp) 295 { 296 char *pool_name; 297 int len; 298 zpool_handle_t *zph; 299 300 len = strcspn(zhp->zfs_name, "/@#") + 1; 301 pool_name = zfs_alloc(zhp->zfs_hdl, len); 302 (void) strlcpy(pool_name, zhp->zfs_name, len); 303 304 zph = zpool_find_handle(zhp, pool_name, len); 305 if (zph == NULL) 306 zph = zpool_add_handle(zhp, pool_name); 307 308 free(pool_name); 309 return (zph); 310 } 311 312 void 313 zpool_free_handles(libzfs_handle_t *hdl) 314 { 315 zpool_handle_t *next, *zph = hdl->libzfs_pool_handles; 316 317 while (zph != NULL) { 318 next = zph->zpool_next; 319 zpool_close(zph); 320 zph = next; 321 } 322 hdl->libzfs_pool_handles = NULL; 323 } 324 325 /* 326 * Utility function to gather stats (objset and zpl) for the given object. 327 */ 328 static int 329 get_stats_ioctl(zfs_handle_t *zhp, zfs_cmd_t *zc) 330 { 331 libzfs_handle_t *hdl = zhp->zfs_hdl; 332 333 (void) strlcpy(zc->zc_name, zhp->zfs_name, sizeof (zc->zc_name)); 334 335 while (zfs_ioctl(hdl, ZFS_IOC_OBJSET_STATS, zc) != 0) { 336 if (errno == ENOMEM) { 337 if (zcmd_expand_dst_nvlist(hdl, zc) != 0) { 338 return (-1); 339 } 340 } else { 341 return (-1); 342 } 343 } 344 return (0); 345 } 346 347 /* 348 * Utility function to get the received properties of the given object. 349 */ 350 static int 351 get_recvd_props_ioctl(zfs_handle_t *zhp) 352 { 353 libzfs_handle_t *hdl = zhp->zfs_hdl; 354 nvlist_t *recvdprops; 355 zfs_cmd_t zc = {"\0"}; 356 int err; 357 358 if (zcmd_alloc_dst_nvlist(hdl, &zc, 0) != 0) 359 return (-1); 360 361 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 362 363 while (zfs_ioctl(hdl, ZFS_IOC_OBJSET_RECVD_PROPS, &zc) != 0) { 364 if (errno == ENOMEM) { 365 if (zcmd_expand_dst_nvlist(hdl, &zc) != 0) { 366 return (-1); 367 } 368 } else { 369 zcmd_free_nvlists(&zc); 370 return (-1); 371 } 372 } 373 374 err = zcmd_read_dst_nvlist(zhp->zfs_hdl, &zc, &recvdprops); 375 zcmd_free_nvlists(&zc); 376 if (err != 0) 377 return (-1); 378 379 nvlist_free(zhp->zfs_recvd_props); 380 zhp->zfs_recvd_props = recvdprops; 381 382 return (0); 383 } 384 385 static int 386 put_stats_zhdl(zfs_handle_t *zhp, zfs_cmd_t *zc) 387 { 388 nvlist_t *allprops, *userprops; 389 390 zhp->zfs_dmustats = zc->zc_objset_stats; /* structure assignment */ 391 392 if (zcmd_read_dst_nvlist(zhp->zfs_hdl, zc, &allprops) != 0) { 393 return (-1); 394 } 395 396 /* 397 * XXX Why do we store the user props separately, in addition to 398 * storing them in zfs_props? 399 */ 400 if ((userprops = process_user_props(zhp, allprops)) == NULL) { 401 nvlist_free(allprops); 402 return (-1); 403 } 404 405 nvlist_free(zhp->zfs_props); 406 nvlist_free(zhp->zfs_user_props); 407 408 zhp->zfs_props = allprops; 409 zhp->zfs_user_props = userprops; 410 411 return (0); 412 } 413 414 static int 415 get_stats(zfs_handle_t *zhp) 416 { 417 int rc = 0; 418 zfs_cmd_t zc = {"\0"}; 419 420 if (zcmd_alloc_dst_nvlist(zhp->zfs_hdl, &zc, 0) != 0) 421 return (-1); 422 if (get_stats_ioctl(zhp, &zc) != 0) 423 rc = -1; 424 else if (put_stats_zhdl(zhp, &zc) != 0) 425 rc = -1; 426 zcmd_free_nvlists(&zc); 427 return (rc); 428 } 429 430 /* 431 * Refresh the properties currently stored in the handle. 432 */ 433 void 434 zfs_refresh_properties(zfs_handle_t *zhp) 435 { 436 (void) get_stats(zhp); 437 } 438 439 /* 440 * Makes a handle from the given dataset name. Used by zfs_open() and 441 * zfs_iter_* to create child handles on the fly. 442 */ 443 static int 444 make_dataset_handle_common(zfs_handle_t *zhp, zfs_cmd_t *zc) 445 { 446 if (put_stats_zhdl(zhp, zc) != 0) 447 return (-1); 448 449 /* 450 * We've managed to open the dataset and gather statistics. Determine 451 * the high-level type. 452 */ 453 if (zhp->zfs_dmustats.dds_type == DMU_OST_ZVOL) 454 zhp->zfs_head_type = ZFS_TYPE_VOLUME; 455 else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZFS) 456 zhp->zfs_head_type = ZFS_TYPE_FILESYSTEM; 457 else if (zhp->zfs_dmustats.dds_type == DMU_OST_OTHER) 458 return (-1); 459 else 460 abort(); 461 462 if (zhp->zfs_dmustats.dds_is_snapshot) 463 zhp->zfs_type = ZFS_TYPE_SNAPSHOT; 464 else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZVOL) 465 zhp->zfs_type = ZFS_TYPE_VOLUME; 466 else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZFS) 467 zhp->zfs_type = ZFS_TYPE_FILESYSTEM; 468 else 469 abort(); /* we should never see any other types */ 470 471 if ((zhp->zpool_hdl = zpool_handle(zhp)) == NULL) 472 return (-1); 473 474 return (0); 475 } 476 477 zfs_handle_t * 478 make_dataset_handle(libzfs_handle_t *hdl, const char *path) 479 { 480 zfs_cmd_t zc = {"\0"}; 481 482 zfs_handle_t *zhp = calloc(1, sizeof (zfs_handle_t)); 483 484 if (zhp == NULL) 485 return (NULL); 486 487 zhp->zfs_hdl = hdl; 488 (void) strlcpy(zhp->zfs_name, path, sizeof (zhp->zfs_name)); 489 if (zcmd_alloc_dst_nvlist(hdl, &zc, 0) != 0) { 490 free(zhp); 491 return (NULL); 492 } 493 if (get_stats_ioctl(zhp, &zc) == -1) { 494 zcmd_free_nvlists(&zc); 495 free(zhp); 496 return (NULL); 497 } 498 if (make_dataset_handle_common(zhp, &zc) == -1) { 499 free(zhp); 500 zhp = NULL; 501 } 502 zcmd_free_nvlists(&zc); 503 return (zhp); 504 } 505 506 zfs_handle_t * 507 make_dataset_handle_zc(libzfs_handle_t *hdl, zfs_cmd_t *zc) 508 { 509 zfs_handle_t *zhp = calloc(1, sizeof (zfs_handle_t)); 510 511 if (zhp == NULL) 512 return (NULL); 513 514 zhp->zfs_hdl = hdl; 515 (void) strlcpy(zhp->zfs_name, zc->zc_name, sizeof (zhp->zfs_name)); 516 if (make_dataset_handle_common(zhp, zc) == -1) { 517 free(zhp); 518 return (NULL); 519 } 520 return (zhp); 521 } 522 523 zfs_handle_t * 524 make_dataset_simple_handle_zc(zfs_handle_t *pzhp, zfs_cmd_t *zc) 525 { 526 zfs_handle_t *zhp = calloc(1, sizeof (zfs_handle_t)); 527 528 if (zhp == NULL) 529 return (NULL); 530 531 zhp->zfs_hdl = pzhp->zfs_hdl; 532 (void) strlcpy(zhp->zfs_name, zc->zc_name, sizeof (zhp->zfs_name)); 533 zhp->zfs_head_type = pzhp->zfs_type; 534 zhp->zfs_type = ZFS_TYPE_SNAPSHOT; 535 zhp->zpool_hdl = zpool_handle(zhp); 536 537 return (zhp); 538 } 539 540 zfs_handle_t * 541 zfs_handle_dup(zfs_handle_t *zhp_orig) 542 { 543 zfs_handle_t *zhp = calloc(1, sizeof (zfs_handle_t)); 544 545 if (zhp == NULL) 546 return (NULL); 547 548 zhp->zfs_hdl = zhp_orig->zfs_hdl; 549 zhp->zpool_hdl = zhp_orig->zpool_hdl; 550 (void) strlcpy(zhp->zfs_name, zhp_orig->zfs_name, 551 sizeof (zhp->zfs_name)); 552 zhp->zfs_type = zhp_orig->zfs_type; 553 zhp->zfs_head_type = zhp_orig->zfs_head_type; 554 zhp->zfs_dmustats = zhp_orig->zfs_dmustats; 555 if (zhp_orig->zfs_props != NULL) { 556 if (nvlist_dup(zhp_orig->zfs_props, &zhp->zfs_props, 0) != 0) { 557 (void) no_memory(zhp->zfs_hdl); 558 zfs_close(zhp); 559 return (NULL); 560 } 561 } 562 if (zhp_orig->zfs_user_props != NULL) { 563 if (nvlist_dup(zhp_orig->zfs_user_props, 564 &zhp->zfs_user_props, 0) != 0) { 565 (void) no_memory(zhp->zfs_hdl); 566 zfs_close(zhp); 567 return (NULL); 568 } 569 } 570 if (zhp_orig->zfs_recvd_props != NULL) { 571 if (nvlist_dup(zhp_orig->zfs_recvd_props, 572 &zhp->zfs_recvd_props, 0)) { 573 (void) no_memory(zhp->zfs_hdl); 574 zfs_close(zhp); 575 return (NULL); 576 } 577 } 578 zhp->zfs_mntcheck = zhp_orig->zfs_mntcheck; 579 if (zhp_orig->zfs_mntopts != NULL) { 580 zhp->zfs_mntopts = zfs_strdup(zhp_orig->zfs_hdl, 581 zhp_orig->zfs_mntopts); 582 } 583 zhp->zfs_props_table = zhp_orig->zfs_props_table; 584 return (zhp); 585 } 586 587 boolean_t 588 zfs_bookmark_exists(const char *path) 589 { 590 nvlist_t *bmarks; 591 nvlist_t *props; 592 char fsname[ZFS_MAX_DATASET_NAME_LEN]; 593 char *bmark_name; 594 char *pound; 595 int err; 596 boolean_t rv; 597 598 (void) strlcpy(fsname, path, sizeof (fsname)); 599 pound = strchr(fsname, '#'); 600 if (pound == NULL) 601 return (B_FALSE); 602 603 *pound = '\0'; 604 bmark_name = pound + 1; 605 props = fnvlist_alloc(); 606 err = lzc_get_bookmarks(fsname, props, &bmarks); 607 nvlist_free(props); 608 if (err != 0) { 609 nvlist_free(bmarks); 610 return (B_FALSE); 611 } 612 613 rv = nvlist_exists(bmarks, bmark_name); 614 nvlist_free(bmarks); 615 return (rv); 616 } 617 618 zfs_handle_t * 619 make_bookmark_handle(zfs_handle_t *parent, const char *path, 620 nvlist_t *bmark_props) 621 { 622 zfs_handle_t *zhp = calloc(1, sizeof (zfs_handle_t)); 623 624 if (zhp == NULL) 625 return (NULL); 626 627 /* Fill in the name. */ 628 zhp->zfs_hdl = parent->zfs_hdl; 629 (void) strlcpy(zhp->zfs_name, path, sizeof (zhp->zfs_name)); 630 631 /* Set the property lists. */ 632 if (nvlist_dup(bmark_props, &zhp->zfs_props, 0) != 0) { 633 free(zhp); 634 return (NULL); 635 } 636 637 /* Set the types. */ 638 zhp->zfs_head_type = parent->zfs_head_type; 639 zhp->zfs_type = ZFS_TYPE_BOOKMARK; 640 641 if ((zhp->zpool_hdl = zpool_handle(zhp)) == NULL) { 642 nvlist_free(zhp->zfs_props); 643 free(zhp); 644 return (NULL); 645 } 646 647 return (zhp); 648 } 649 650 struct zfs_open_bookmarks_cb_data { 651 const char *path; 652 zfs_handle_t *zhp; 653 }; 654 655 static int 656 zfs_open_bookmarks_cb(zfs_handle_t *zhp, void *data) 657 { 658 struct zfs_open_bookmarks_cb_data *dp = data; 659 660 /* 661 * Is it the one we are looking for? 662 */ 663 if (strcmp(dp->path, zfs_get_name(zhp)) == 0) { 664 /* 665 * We found it. Save it and let the caller know we are done. 666 */ 667 dp->zhp = zhp; 668 return (EEXIST); 669 } 670 671 /* 672 * Not found. Close the handle and ask for another one. 673 */ 674 zfs_close(zhp); 675 return (0); 676 } 677 678 /* 679 * Opens the given snapshot, bookmark, filesystem, or volume. The 'types' 680 * argument is a mask of acceptable types. The function will print an 681 * appropriate error message and return NULL if it can't be opened. 682 */ 683 zfs_handle_t * 684 zfs_open(libzfs_handle_t *hdl, const char *path, int types) 685 { 686 zfs_handle_t *zhp; 687 char errbuf[1024]; 688 char *bookp; 689 690 (void) snprintf(errbuf, sizeof (errbuf), 691 dgettext(TEXT_DOMAIN, "cannot open '%s'"), path); 692 693 /* 694 * Validate the name before we even try to open it. 695 */ 696 if (!zfs_validate_name(hdl, path, types, B_FALSE)) { 697 (void) zfs_error(hdl, EZFS_INVALIDNAME, errbuf); 698 return (NULL); 699 } 700 701 /* 702 * Bookmarks needs to be handled separately. 703 */ 704 bookp = strchr(path, '#'); 705 if (bookp == NULL) { 706 /* 707 * Try to get stats for the dataset, which will tell us if it 708 * exists. 709 */ 710 errno = 0; 711 if ((zhp = make_dataset_handle(hdl, path)) == NULL) { 712 (void) zfs_standard_error(hdl, errno, errbuf); 713 return (NULL); 714 } 715 } else { 716 char dsname[ZFS_MAX_DATASET_NAME_LEN]; 717 zfs_handle_t *pzhp; 718 struct zfs_open_bookmarks_cb_data cb_data = {path, NULL}; 719 720 /* 721 * We need to cut out '#' and everything after '#' 722 * to get the parent dataset name only. 723 */ 724 assert(bookp - path < sizeof (dsname)); 725 (void) strncpy(dsname, path, bookp - path); 726 dsname[bookp - path] = '\0'; 727 728 /* 729 * Create handle for the parent dataset. 730 */ 731 errno = 0; 732 if ((pzhp = make_dataset_handle(hdl, dsname)) == NULL) { 733 (void) zfs_standard_error(hdl, errno, errbuf); 734 return (NULL); 735 } 736 737 /* 738 * Iterate bookmarks to find the right one. 739 */ 740 errno = 0; 741 if ((zfs_iter_bookmarks(pzhp, zfs_open_bookmarks_cb, 742 &cb_data) == 0) && (cb_data.zhp == NULL)) { 743 (void) zfs_error(hdl, EZFS_NOENT, errbuf); 744 zfs_close(pzhp); 745 return (NULL); 746 } 747 if (cb_data.zhp == NULL) { 748 (void) zfs_standard_error(hdl, errno, errbuf); 749 zfs_close(pzhp); 750 return (NULL); 751 } 752 zhp = cb_data.zhp; 753 754 /* 755 * Cleanup. 756 */ 757 zfs_close(pzhp); 758 } 759 760 if (!(types & zhp->zfs_type)) { 761 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf); 762 zfs_close(zhp); 763 return (NULL); 764 } 765 766 return (zhp); 767 } 768 769 /* 770 * Release a ZFS handle. Nothing to do but free the associated memory. 771 */ 772 void 773 zfs_close(zfs_handle_t *zhp) 774 { 775 if (zhp->zfs_mntopts) 776 free(zhp->zfs_mntopts); 777 nvlist_free(zhp->zfs_props); 778 nvlist_free(zhp->zfs_user_props); 779 nvlist_free(zhp->zfs_recvd_props); 780 free(zhp); 781 } 782 783 typedef struct mnttab_node { 784 struct mnttab mtn_mt; 785 avl_node_t mtn_node; 786 } mnttab_node_t; 787 788 static int 789 libzfs_mnttab_cache_compare(const void *arg1, const void *arg2) 790 { 791 const mnttab_node_t *mtn1 = (const mnttab_node_t *)arg1; 792 const mnttab_node_t *mtn2 = (const mnttab_node_t *)arg2; 793 int rv; 794 795 rv = strcmp(mtn1->mtn_mt.mnt_special, mtn2->mtn_mt.mnt_special); 796 797 return (TREE_ISIGN(rv)); 798 } 799 800 void 801 libzfs_mnttab_init(libzfs_handle_t *hdl) 802 { 803 pthread_mutex_init(&hdl->libzfs_mnttab_cache_lock, NULL); 804 assert(avl_numnodes(&hdl->libzfs_mnttab_cache) == 0); 805 avl_create(&hdl->libzfs_mnttab_cache, libzfs_mnttab_cache_compare, 806 sizeof (mnttab_node_t), offsetof(mnttab_node_t, mtn_node)); 807 } 808 809 static int 810 libzfs_mnttab_update(libzfs_handle_t *hdl) 811 { 812 struct mnttab entry; 813 814 /* Reopen MNTTAB to prevent reading stale data from open file */ 815 if (freopen(MNTTAB, "r", hdl->libzfs_mnttab) == NULL) 816 return (ENOENT); 817 818 while (getmntent(hdl->libzfs_mnttab, &entry) == 0) { 819 mnttab_node_t *mtn; 820 avl_index_t where; 821 822 if (strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0) 823 continue; 824 825 mtn = zfs_alloc(hdl, sizeof (mnttab_node_t)); 826 mtn->mtn_mt.mnt_special = zfs_strdup(hdl, entry.mnt_special); 827 mtn->mtn_mt.mnt_mountp = zfs_strdup(hdl, entry.mnt_mountp); 828 mtn->mtn_mt.mnt_fstype = zfs_strdup(hdl, entry.mnt_fstype); 829 mtn->mtn_mt.mnt_mntopts = zfs_strdup(hdl, entry.mnt_mntopts); 830 831 /* Exclude duplicate mounts */ 832 if (avl_find(&hdl->libzfs_mnttab_cache, mtn, &where) != NULL) { 833 free(mtn->mtn_mt.mnt_special); 834 free(mtn->mtn_mt.mnt_mountp); 835 free(mtn->mtn_mt.mnt_fstype); 836 free(mtn->mtn_mt.mnt_mntopts); 837 free(mtn); 838 continue; 839 } 840 841 avl_add(&hdl->libzfs_mnttab_cache, mtn); 842 } 843 844 return (0); 845 } 846 847 void 848 libzfs_mnttab_fini(libzfs_handle_t *hdl) 849 { 850 void *cookie = NULL; 851 mnttab_node_t *mtn; 852 853 while ((mtn = avl_destroy_nodes(&hdl->libzfs_mnttab_cache, &cookie)) 854 != NULL) { 855 free(mtn->mtn_mt.mnt_special); 856 free(mtn->mtn_mt.mnt_mountp); 857 free(mtn->mtn_mt.mnt_fstype); 858 free(mtn->mtn_mt.mnt_mntopts); 859 free(mtn); 860 } 861 avl_destroy(&hdl->libzfs_mnttab_cache); 862 (void) pthread_mutex_destroy(&hdl->libzfs_mnttab_cache_lock); 863 } 864 865 void 866 libzfs_mnttab_cache(libzfs_handle_t *hdl, boolean_t enable) 867 { 868 hdl->libzfs_mnttab_enable = enable; 869 } 870 871 int 872 libzfs_mnttab_find(libzfs_handle_t *hdl, const char *fsname, 873 struct mnttab *entry) 874 { 875 mnttab_node_t find; 876 mnttab_node_t *mtn; 877 int ret = ENOENT; 878 879 if (!hdl->libzfs_mnttab_enable) { 880 struct mnttab srch = { 0 }; 881 882 if (avl_numnodes(&hdl->libzfs_mnttab_cache)) 883 libzfs_mnttab_fini(hdl); 884 885 /* Reopen MNTTAB to prevent reading stale data from open file */ 886 if (freopen(MNTTAB, "r", hdl->libzfs_mnttab) == NULL) 887 return (ENOENT); 888 889 srch.mnt_special = (char *)fsname; 890 srch.mnt_fstype = MNTTYPE_ZFS; 891 if (getmntany(hdl->libzfs_mnttab, entry, &srch) == 0) 892 return (0); 893 else 894 return (ENOENT); 895 } 896 897 pthread_mutex_lock(&hdl->libzfs_mnttab_cache_lock); 898 if (avl_numnodes(&hdl->libzfs_mnttab_cache) == 0) { 899 int error; 900 901 if ((error = libzfs_mnttab_update(hdl)) != 0) { 902 pthread_mutex_unlock(&hdl->libzfs_mnttab_cache_lock); 903 return (error); 904 } 905 } 906 907 find.mtn_mt.mnt_special = (char *)fsname; 908 mtn = avl_find(&hdl->libzfs_mnttab_cache, &find, NULL); 909 if (mtn) { 910 *entry = mtn->mtn_mt; 911 ret = 0; 912 } 913 pthread_mutex_unlock(&hdl->libzfs_mnttab_cache_lock); 914 return (ret); 915 } 916 917 void 918 libzfs_mnttab_add(libzfs_handle_t *hdl, const char *special, 919 const char *mountp, const char *mntopts) 920 { 921 mnttab_node_t *mtn; 922 923 pthread_mutex_lock(&hdl->libzfs_mnttab_cache_lock); 924 if (avl_numnodes(&hdl->libzfs_mnttab_cache) != 0) { 925 mtn = zfs_alloc(hdl, sizeof (mnttab_node_t)); 926 mtn->mtn_mt.mnt_special = zfs_strdup(hdl, special); 927 mtn->mtn_mt.mnt_mountp = zfs_strdup(hdl, mountp); 928 mtn->mtn_mt.mnt_fstype = zfs_strdup(hdl, MNTTYPE_ZFS); 929 mtn->mtn_mt.mnt_mntopts = zfs_strdup(hdl, mntopts); 930 /* 931 * Another thread may have already added this entry 932 * via libzfs_mnttab_update. If so we should skip it. 933 */ 934 if (avl_find(&hdl->libzfs_mnttab_cache, mtn, NULL) != NULL) { 935 free(mtn->mtn_mt.mnt_special); 936 free(mtn->mtn_mt.mnt_mountp); 937 free(mtn->mtn_mt.mnt_fstype); 938 free(mtn->mtn_mt.mnt_mntopts); 939 free(mtn); 940 } else { 941 avl_add(&hdl->libzfs_mnttab_cache, mtn); 942 } 943 } 944 pthread_mutex_unlock(&hdl->libzfs_mnttab_cache_lock); 945 } 946 947 void 948 libzfs_mnttab_remove(libzfs_handle_t *hdl, const char *fsname) 949 { 950 mnttab_node_t find; 951 mnttab_node_t *ret; 952 953 pthread_mutex_lock(&hdl->libzfs_mnttab_cache_lock); 954 find.mtn_mt.mnt_special = (char *)fsname; 955 if ((ret = avl_find(&hdl->libzfs_mnttab_cache, (void *)&find, NULL)) 956 != NULL) { 957 avl_remove(&hdl->libzfs_mnttab_cache, ret); 958 free(ret->mtn_mt.mnt_special); 959 free(ret->mtn_mt.mnt_mountp); 960 free(ret->mtn_mt.mnt_fstype); 961 free(ret->mtn_mt.mnt_mntopts); 962 free(ret); 963 } 964 pthread_mutex_unlock(&hdl->libzfs_mnttab_cache_lock); 965 } 966 967 int 968 zfs_spa_version(zfs_handle_t *zhp, int *spa_version) 969 { 970 zpool_handle_t *zpool_handle = zhp->zpool_hdl; 971 972 if (zpool_handle == NULL) 973 return (-1); 974 975 *spa_version = zpool_get_prop_int(zpool_handle, 976 ZPOOL_PROP_VERSION, NULL); 977 return (0); 978 } 979 980 /* 981 * The choice of reservation property depends on the SPA version. 982 */ 983 static int 984 zfs_which_resv_prop(zfs_handle_t *zhp, zfs_prop_t *resv_prop) 985 { 986 int spa_version; 987 988 if (zfs_spa_version(zhp, &spa_version) < 0) 989 return (-1); 990 991 if (spa_version >= SPA_VERSION_REFRESERVATION) 992 *resv_prop = ZFS_PROP_REFRESERVATION; 993 else 994 *resv_prop = ZFS_PROP_RESERVATION; 995 996 return (0); 997 } 998 999 /* 1000 * Given an nvlist of properties to set, validates that they are correct, and 1001 * parses any numeric properties (index, boolean, etc) if they are specified as 1002 * strings. 1003 */ 1004 nvlist_t * 1005 zfs_valid_proplist(libzfs_handle_t *hdl, zfs_type_t type, nvlist_t *nvl, 1006 uint64_t zoned, zfs_handle_t *zhp, zpool_handle_t *zpool_hdl, 1007 boolean_t key_params_ok, const char *errbuf) 1008 { 1009 nvpair_t *elem; 1010 uint64_t intval; 1011 char *strval; 1012 zfs_prop_t prop; 1013 nvlist_t *ret; 1014 int chosen_normal = -1; 1015 int chosen_utf = -1; 1016 1017 if (nvlist_alloc(&ret, NV_UNIQUE_NAME, 0) != 0) { 1018 (void) no_memory(hdl); 1019 return (NULL); 1020 } 1021 1022 /* 1023 * Make sure this property is valid and applies to this type. 1024 */ 1025 1026 elem = NULL; 1027 while ((elem = nvlist_next_nvpair(nvl, elem)) != NULL) { 1028 const char *propname = nvpair_name(elem); 1029 1030 prop = zfs_name_to_prop(propname); 1031 if (prop == ZPROP_INVAL && zfs_prop_user(propname)) { 1032 /* 1033 * This is a user property: make sure it's a 1034 * string, and that it's less than ZAP_MAXNAMELEN. 1035 */ 1036 if (nvpair_type(elem) != DATA_TYPE_STRING) { 1037 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1038 "'%s' must be a string"), propname); 1039 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1040 goto error; 1041 } 1042 1043 if (strlen(nvpair_name(elem)) >= ZAP_MAXNAMELEN) { 1044 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1045 "property name '%s' is too long"), 1046 propname); 1047 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1048 goto error; 1049 } 1050 1051 (void) nvpair_value_string(elem, &strval); 1052 if (nvlist_add_string(ret, propname, strval) != 0) { 1053 (void) no_memory(hdl); 1054 goto error; 1055 } 1056 continue; 1057 } 1058 1059 /* 1060 * Currently, only user properties can be modified on 1061 * snapshots. 1062 */ 1063 if (type == ZFS_TYPE_SNAPSHOT) { 1064 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1065 "this property can not be modified for snapshots")); 1066 (void) zfs_error(hdl, EZFS_PROPTYPE, errbuf); 1067 goto error; 1068 } 1069 1070 if (prop == ZPROP_INVAL && zfs_prop_userquota(propname)) { 1071 zfs_userquota_prop_t uqtype; 1072 char *newpropname = NULL; 1073 char domain[128]; 1074 uint64_t rid; 1075 uint64_t valary[3]; 1076 int rc; 1077 1078 if (userquota_propname_decode(propname, zoned, 1079 &uqtype, domain, sizeof (domain), &rid) != 0) { 1080 zfs_error_aux(hdl, 1081 dgettext(TEXT_DOMAIN, 1082 "'%s' has an invalid user/group name"), 1083 propname); 1084 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1085 goto error; 1086 } 1087 1088 if (uqtype != ZFS_PROP_USERQUOTA && 1089 uqtype != ZFS_PROP_GROUPQUOTA && 1090 uqtype != ZFS_PROP_USEROBJQUOTA && 1091 uqtype != ZFS_PROP_GROUPOBJQUOTA && 1092 uqtype != ZFS_PROP_PROJECTQUOTA && 1093 uqtype != ZFS_PROP_PROJECTOBJQUOTA) { 1094 zfs_error_aux(hdl, 1095 dgettext(TEXT_DOMAIN, "'%s' is readonly"), 1096 propname); 1097 (void) zfs_error(hdl, EZFS_PROPREADONLY, 1098 errbuf); 1099 goto error; 1100 } 1101 1102 if (nvpair_type(elem) == DATA_TYPE_STRING) { 1103 (void) nvpair_value_string(elem, &strval); 1104 if (strcmp(strval, "none") == 0) { 1105 intval = 0; 1106 } else if (zfs_nicestrtonum(hdl, 1107 strval, &intval) != 0) { 1108 (void) zfs_error(hdl, 1109 EZFS_BADPROP, errbuf); 1110 goto error; 1111 } 1112 } else if (nvpair_type(elem) == 1113 DATA_TYPE_UINT64) { 1114 (void) nvpair_value_uint64(elem, &intval); 1115 if (intval == 0) { 1116 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1117 "use 'none' to disable " 1118 "{user|group|project}quota")); 1119 goto error; 1120 } 1121 } else { 1122 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1123 "'%s' must be a number"), propname); 1124 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1125 goto error; 1126 } 1127 1128 /* 1129 * Encode the prop name as 1130 * userquota@<hex-rid>-domain, to make it easy 1131 * for the kernel to decode. 1132 */ 1133 rc = asprintf(&newpropname, "%s%llx-%s", 1134 zfs_userquota_prop_prefixes[uqtype], 1135 (longlong_t)rid, domain); 1136 if (rc == -1 || newpropname == NULL) { 1137 (void) no_memory(hdl); 1138 goto error; 1139 } 1140 1141 valary[0] = uqtype; 1142 valary[1] = rid; 1143 valary[2] = intval; 1144 if (nvlist_add_uint64_array(ret, newpropname, 1145 valary, 3) != 0) { 1146 free(newpropname); 1147 (void) no_memory(hdl); 1148 goto error; 1149 } 1150 free(newpropname); 1151 continue; 1152 } else if (prop == ZPROP_INVAL && zfs_prop_written(propname)) { 1153 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1154 "'%s' is readonly"), 1155 propname); 1156 (void) zfs_error(hdl, EZFS_PROPREADONLY, errbuf); 1157 goto error; 1158 } 1159 1160 if (prop == ZPROP_INVAL) { 1161 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1162 "invalid property '%s'"), propname); 1163 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1164 goto error; 1165 } 1166 1167 if (!zfs_prop_valid_for_type(prop, type, B_FALSE)) { 1168 zfs_error_aux(hdl, 1169 dgettext(TEXT_DOMAIN, "'%s' does not " 1170 "apply to datasets of this type"), propname); 1171 (void) zfs_error(hdl, EZFS_PROPTYPE, errbuf); 1172 goto error; 1173 } 1174 1175 if (zfs_prop_readonly(prop) && 1176 !(zfs_prop_setonce(prop) && zhp == NULL) && 1177 !(zfs_prop_encryption_key_param(prop) && key_params_ok)) { 1178 zfs_error_aux(hdl, 1179 dgettext(TEXT_DOMAIN, "'%s' is readonly"), 1180 propname); 1181 (void) zfs_error(hdl, EZFS_PROPREADONLY, errbuf); 1182 goto error; 1183 } 1184 1185 if (zprop_parse_value(hdl, elem, prop, type, ret, 1186 &strval, &intval, errbuf) != 0) 1187 goto error; 1188 1189 /* 1190 * Perform some additional checks for specific properties. 1191 */ 1192 switch (prop) { 1193 case ZFS_PROP_VERSION: 1194 { 1195 int version; 1196 1197 if (zhp == NULL) 1198 break; 1199 version = zfs_prop_get_int(zhp, ZFS_PROP_VERSION); 1200 if (intval < version) { 1201 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1202 "Can not downgrade; already at version %u"), 1203 version); 1204 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1205 goto error; 1206 } 1207 break; 1208 } 1209 1210 case ZFS_PROP_VOLBLOCKSIZE: 1211 case ZFS_PROP_RECORDSIZE: 1212 { 1213 int maxbs = SPA_MAXBLOCKSIZE; 1214 char buf[64]; 1215 1216 if (zpool_hdl != NULL) { 1217 maxbs = zpool_get_prop_int(zpool_hdl, 1218 ZPOOL_PROP_MAXBLOCKSIZE, NULL); 1219 } 1220 /* 1221 * The value must be a power of two between 1222 * SPA_MINBLOCKSIZE and maxbs. 1223 */ 1224 if (intval < SPA_MINBLOCKSIZE || 1225 intval > maxbs || !ISP2(intval)) { 1226 zfs_nicebytes(maxbs, buf, sizeof (buf)); 1227 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1228 "'%s' must be power of 2 from 512B " 1229 "to %s"), propname, buf); 1230 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1231 goto error; 1232 } 1233 break; 1234 } 1235 1236 case ZFS_PROP_SPECIAL_SMALL_BLOCKS: 1237 { 1238 int maxbs = SPA_OLD_MAXBLOCKSIZE; 1239 char buf[64]; 1240 1241 if (zpool_hdl != NULL) { 1242 char state[64] = ""; 1243 1244 maxbs = zpool_get_prop_int(zpool_hdl, 1245 ZPOOL_PROP_MAXBLOCKSIZE, NULL); 1246 1247 /* 1248 * Issue a warning but do not fail so that 1249 * tests for settable properties succeed. 1250 */ 1251 if (zpool_prop_get_feature(zpool_hdl, 1252 "feature@allocation_classes", state, 1253 sizeof (state)) != 0 || 1254 strcmp(state, ZFS_FEATURE_ACTIVE) != 0) { 1255 (void) fprintf(stderr, gettext( 1256 "%s: property requires a special " 1257 "device in the pool\n"), propname); 1258 } 1259 } 1260 if (intval != 0 && 1261 (intval < SPA_MINBLOCKSIZE || 1262 intval > maxbs || !ISP2(intval))) { 1263 zfs_nicebytes(maxbs, buf, sizeof (buf)); 1264 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1265 "invalid '%s=%d' property: must be zero or " 1266 "a power of 2 from 512B to %s"), propname, 1267 intval, buf); 1268 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1269 goto error; 1270 } 1271 break; 1272 } 1273 1274 case ZFS_PROP_MLSLABEL: 1275 { 1276 #ifdef HAVE_MLSLABEL 1277 /* 1278 * Verify the mlslabel string and convert to 1279 * internal hex label string. 1280 */ 1281 1282 m_label_t *new_sl; 1283 char *hex = NULL; /* internal label string */ 1284 1285 /* Default value is already OK. */ 1286 if (strcasecmp(strval, ZFS_MLSLABEL_DEFAULT) == 0) 1287 break; 1288 1289 /* Verify the label can be converted to binary form */ 1290 if (((new_sl = m_label_alloc(MAC_LABEL)) == NULL) || 1291 (str_to_label(strval, &new_sl, MAC_LABEL, 1292 L_NO_CORRECTION, NULL) == -1)) { 1293 goto badlabel; 1294 } 1295 1296 /* Now translate to hex internal label string */ 1297 if (label_to_str(new_sl, &hex, M_INTERNAL, 1298 DEF_NAMES) != 0) { 1299 if (hex) 1300 free(hex); 1301 goto badlabel; 1302 } 1303 m_label_free(new_sl); 1304 1305 /* If string is already in internal form, we're done. */ 1306 if (strcmp(strval, hex) == 0) { 1307 free(hex); 1308 break; 1309 } 1310 1311 /* Replace the label string with the internal form. */ 1312 (void) nvlist_remove(ret, zfs_prop_to_name(prop), 1313 DATA_TYPE_STRING); 1314 verify(nvlist_add_string(ret, zfs_prop_to_name(prop), 1315 hex) == 0); 1316 free(hex); 1317 1318 break; 1319 1320 badlabel: 1321 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1322 "invalid mlslabel '%s'"), strval); 1323 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1324 m_label_free(new_sl); /* OK if null */ 1325 goto error; 1326 #else 1327 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1328 "mlslabels are unsupported")); 1329 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1330 goto error; 1331 #endif /* HAVE_MLSLABEL */ 1332 } 1333 1334 case ZFS_PROP_MOUNTPOINT: 1335 { 1336 namecheck_err_t why; 1337 1338 if (strcmp(strval, ZFS_MOUNTPOINT_NONE) == 0 || 1339 strcmp(strval, ZFS_MOUNTPOINT_LEGACY) == 0) 1340 break; 1341 1342 if (mountpoint_namecheck(strval, &why)) { 1343 switch (why) { 1344 case NAME_ERR_LEADING_SLASH: 1345 zfs_error_aux(hdl, 1346 dgettext(TEXT_DOMAIN, 1347 "'%s' must be an absolute path, " 1348 "'none', or 'legacy'"), propname); 1349 break; 1350 case NAME_ERR_TOOLONG: 1351 zfs_error_aux(hdl, 1352 dgettext(TEXT_DOMAIN, 1353 "component of '%s' is too long"), 1354 propname); 1355 break; 1356 1357 default: 1358 zfs_error_aux(hdl, 1359 dgettext(TEXT_DOMAIN, 1360 "(%d) not defined"), 1361 why); 1362 break; 1363 } 1364 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1365 goto error; 1366 } 1367 } 1368 1369 /*FALLTHRU*/ 1370 1371 case ZFS_PROP_SHARESMB: 1372 case ZFS_PROP_SHARENFS: 1373 /* 1374 * For the mountpoint and sharenfs or sharesmb 1375 * properties, check if it can be set in a 1376 * global/non-global zone based on 1377 * the zoned property value: 1378 * 1379 * global zone non-global zone 1380 * -------------------------------------------------- 1381 * zoned=on mountpoint (no) mountpoint (yes) 1382 * sharenfs (no) sharenfs (no) 1383 * sharesmb (no) sharesmb (no) 1384 * 1385 * zoned=off mountpoint (yes) N/A 1386 * sharenfs (yes) 1387 * sharesmb (yes) 1388 */ 1389 if (zoned) { 1390 if (getzoneid() == GLOBAL_ZONEID) { 1391 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1392 "'%s' cannot be set on " 1393 "dataset in a non-global zone"), 1394 propname); 1395 (void) zfs_error(hdl, EZFS_ZONED, 1396 errbuf); 1397 goto error; 1398 } else if (prop == ZFS_PROP_SHARENFS || 1399 prop == ZFS_PROP_SHARESMB) { 1400 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1401 "'%s' cannot be set in " 1402 "a non-global zone"), propname); 1403 (void) zfs_error(hdl, EZFS_ZONED, 1404 errbuf); 1405 goto error; 1406 } 1407 } else if (getzoneid() != GLOBAL_ZONEID) { 1408 /* 1409 * If zoned property is 'off', this must be in 1410 * a global zone. If not, something is wrong. 1411 */ 1412 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1413 "'%s' cannot be set while dataset " 1414 "'zoned' property is set"), propname); 1415 (void) zfs_error(hdl, EZFS_ZONED, errbuf); 1416 goto error; 1417 } 1418 1419 /* 1420 * At this point, it is legitimate to set the 1421 * property. Now we want to make sure that the 1422 * property value is valid if it is sharenfs. 1423 */ 1424 if ((prop == ZFS_PROP_SHARENFS || 1425 prop == ZFS_PROP_SHARESMB) && 1426 strcmp(strval, "on") != 0 && 1427 strcmp(strval, "off") != 0) { 1428 zfs_share_proto_t proto; 1429 1430 if (prop == ZFS_PROP_SHARESMB) 1431 proto = PROTO_SMB; 1432 else 1433 proto = PROTO_NFS; 1434 1435 if (zfs_parse_options(strval, proto) != SA_OK) { 1436 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1437 "'%s' cannot be set to invalid " 1438 "options"), propname); 1439 (void) zfs_error(hdl, EZFS_BADPROP, 1440 errbuf); 1441 goto error; 1442 } 1443 } 1444 1445 break; 1446 1447 case ZFS_PROP_KEYLOCATION: 1448 if (!zfs_prop_valid_keylocation(strval, B_FALSE)) { 1449 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1450 "invalid keylocation")); 1451 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1452 goto error; 1453 } 1454 1455 if (zhp != NULL) { 1456 uint64_t crypt = 1457 zfs_prop_get_int(zhp, ZFS_PROP_ENCRYPTION); 1458 1459 if (crypt == ZIO_CRYPT_OFF && 1460 strcmp(strval, "none") != 0) { 1461 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1462 "keylocation must be 'none' " 1463 "for unencrypted datasets")); 1464 (void) zfs_error(hdl, EZFS_BADPROP, 1465 errbuf); 1466 goto error; 1467 } else if (crypt != ZIO_CRYPT_OFF && 1468 strcmp(strval, "none") == 0) { 1469 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1470 "keylocation must not be 'none' " 1471 "for encrypted datasets")); 1472 (void) zfs_error(hdl, EZFS_BADPROP, 1473 errbuf); 1474 goto error; 1475 } 1476 } 1477 break; 1478 1479 case ZFS_PROP_PBKDF2_ITERS: 1480 if (intval < MIN_PBKDF2_ITERATIONS) { 1481 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1482 "minimum pbkdf2 iterations is %u"), 1483 MIN_PBKDF2_ITERATIONS); 1484 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1485 goto error; 1486 } 1487 break; 1488 1489 case ZFS_PROP_UTF8ONLY: 1490 chosen_utf = (int)intval; 1491 break; 1492 1493 case ZFS_PROP_NORMALIZE: 1494 chosen_normal = (int)intval; 1495 break; 1496 1497 default: 1498 break; 1499 } 1500 1501 /* 1502 * For changes to existing volumes, we have some additional 1503 * checks to enforce. 1504 */ 1505 if (type == ZFS_TYPE_VOLUME && zhp != NULL) { 1506 uint64_t blocksize = zfs_prop_get_int(zhp, 1507 ZFS_PROP_VOLBLOCKSIZE); 1508 char buf[64]; 1509 1510 switch (prop) { 1511 case ZFS_PROP_VOLSIZE: 1512 if (intval % blocksize != 0) { 1513 zfs_nicebytes(blocksize, buf, 1514 sizeof (buf)); 1515 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1516 "'%s' must be a multiple of " 1517 "volume block size (%s)"), 1518 propname, buf); 1519 (void) zfs_error(hdl, EZFS_BADPROP, 1520 errbuf); 1521 goto error; 1522 } 1523 1524 if (intval == 0) { 1525 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1526 "'%s' cannot be zero"), 1527 propname); 1528 (void) zfs_error(hdl, EZFS_BADPROP, 1529 errbuf); 1530 goto error; 1531 } 1532 break; 1533 1534 default: 1535 break; 1536 } 1537 } 1538 1539 /* check encryption properties */ 1540 if (zhp != NULL) { 1541 int64_t crypt = zfs_prop_get_int(zhp, 1542 ZFS_PROP_ENCRYPTION); 1543 1544 switch (prop) { 1545 case ZFS_PROP_COPIES: 1546 if (crypt != ZIO_CRYPT_OFF && intval > 2) { 1547 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1548 "encrypted datasets cannot have " 1549 "3 copies")); 1550 (void) zfs_error(hdl, EZFS_BADPROP, 1551 errbuf); 1552 goto error; 1553 } 1554 break; 1555 default: 1556 break; 1557 } 1558 } 1559 } 1560 1561 /* 1562 * If normalization was chosen, but no UTF8 choice was made, 1563 * enforce rejection of non-UTF8 names. 1564 * 1565 * If normalization was chosen, but rejecting non-UTF8 names 1566 * was explicitly not chosen, it is an error. 1567 */ 1568 if (chosen_normal > 0 && chosen_utf < 0) { 1569 if (nvlist_add_uint64(ret, 1570 zfs_prop_to_name(ZFS_PROP_UTF8ONLY), 1) != 0) { 1571 (void) no_memory(hdl); 1572 goto error; 1573 } 1574 } else if (chosen_normal > 0 && chosen_utf == 0) { 1575 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1576 "'%s' must be set 'on' if normalization chosen"), 1577 zfs_prop_to_name(ZFS_PROP_UTF8ONLY)); 1578 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1579 goto error; 1580 } 1581 return (ret); 1582 1583 error: 1584 nvlist_free(ret); 1585 return (NULL); 1586 } 1587 1588 static int 1589 zfs_add_synthetic_resv(zfs_handle_t *zhp, nvlist_t *nvl) 1590 { 1591 uint64_t old_volsize; 1592 uint64_t new_volsize; 1593 uint64_t old_reservation; 1594 uint64_t new_reservation; 1595 zfs_prop_t resv_prop; 1596 nvlist_t *props; 1597 zpool_handle_t *zph = zpool_handle(zhp); 1598 1599 /* 1600 * If this is an existing volume, and someone is setting the volsize, 1601 * make sure that it matches the reservation, or add it if necessary. 1602 */ 1603 old_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE); 1604 if (zfs_which_resv_prop(zhp, &resv_prop) < 0) 1605 return (-1); 1606 old_reservation = zfs_prop_get_int(zhp, resv_prop); 1607 1608 props = fnvlist_alloc(); 1609 fnvlist_add_uint64(props, zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE), 1610 zfs_prop_get_int(zhp, ZFS_PROP_VOLBLOCKSIZE)); 1611 1612 if ((zvol_volsize_to_reservation(zph, old_volsize, props) != 1613 old_reservation) || nvlist_exists(nvl, 1614 zfs_prop_to_name(resv_prop))) { 1615 fnvlist_free(props); 1616 return (0); 1617 } 1618 if (nvlist_lookup_uint64(nvl, zfs_prop_to_name(ZFS_PROP_VOLSIZE), 1619 &new_volsize) != 0) { 1620 fnvlist_free(props); 1621 return (-1); 1622 } 1623 new_reservation = zvol_volsize_to_reservation(zph, new_volsize, props); 1624 fnvlist_free(props); 1625 1626 if (nvlist_add_uint64(nvl, zfs_prop_to_name(resv_prop), 1627 new_reservation) != 0) { 1628 (void) no_memory(zhp->zfs_hdl); 1629 return (-1); 1630 } 1631 return (1); 1632 } 1633 1634 /* 1635 * Helper for 'zfs {set|clone} refreservation=auto'. Must be called after 1636 * zfs_valid_proplist(), as it is what sets the UINT64_MAX sentinel value. 1637 * Return codes must match zfs_add_synthetic_resv(). 1638 */ 1639 static int 1640 zfs_fix_auto_resv(zfs_handle_t *zhp, nvlist_t *nvl) 1641 { 1642 uint64_t volsize; 1643 uint64_t resvsize; 1644 zfs_prop_t prop; 1645 nvlist_t *props; 1646 1647 if (!ZFS_IS_VOLUME(zhp)) { 1648 return (0); 1649 } 1650 1651 if (zfs_which_resv_prop(zhp, &prop) != 0) { 1652 return (-1); 1653 } 1654 1655 if (prop != ZFS_PROP_REFRESERVATION) { 1656 return (0); 1657 } 1658 1659 if (nvlist_lookup_uint64(nvl, zfs_prop_to_name(prop), &resvsize) != 0) { 1660 /* No value being set, so it can't be "auto" */ 1661 return (0); 1662 } 1663 if (resvsize != UINT64_MAX) { 1664 /* Being set to a value other than "auto" */ 1665 return (0); 1666 } 1667 1668 props = fnvlist_alloc(); 1669 1670 fnvlist_add_uint64(props, zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE), 1671 zfs_prop_get_int(zhp, ZFS_PROP_VOLBLOCKSIZE)); 1672 1673 if (nvlist_lookup_uint64(nvl, zfs_prop_to_name(ZFS_PROP_VOLSIZE), 1674 &volsize) != 0) { 1675 volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE); 1676 } 1677 1678 resvsize = zvol_volsize_to_reservation(zpool_handle(zhp), volsize, 1679 props); 1680 fnvlist_free(props); 1681 1682 (void) nvlist_remove_all(nvl, zfs_prop_to_name(prop)); 1683 if (nvlist_add_uint64(nvl, zfs_prop_to_name(prop), resvsize) != 0) { 1684 (void) no_memory(zhp->zfs_hdl); 1685 return (-1); 1686 } 1687 return (1); 1688 } 1689 1690 static boolean_t 1691 zfs_is_namespace_prop(zfs_prop_t prop) 1692 { 1693 switch (prop) { 1694 1695 case ZFS_PROP_ATIME: 1696 case ZFS_PROP_RELATIME: 1697 case ZFS_PROP_DEVICES: 1698 case ZFS_PROP_EXEC: 1699 case ZFS_PROP_SETUID: 1700 case ZFS_PROP_READONLY: 1701 case ZFS_PROP_XATTR: 1702 case ZFS_PROP_NBMAND: 1703 return (B_TRUE); 1704 1705 default: 1706 return (B_FALSE); 1707 } 1708 } 1709 1710 /* 1711 * Given a property name and value, set the property for the given dataset. 1712 */ 1713 int 1714 zfs_prop_set(zfs_handle_t *zhp, const char *propname, const char *propval) 1715 { 1716 int ret = -1; 1717 char errbuf[1024]; 1718 libzfs_handle_t *hdl = zhp->zfs_hdl; 1719 nvlist_t *nvl = NULL; 1720 1721 (void) snprintf(errbuf, sizeof (errbuf), 1722 dgettext(TEXT_DOMAIN, "cannot set property for '%s'"), 1723 zhp->zfs_name); 1724 1725 if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0 || 1726 nvlist_add_string(nvl, propname, propval) != 0) { 1727 (void) no_memory(hdl); 1728 goto error; 1729 } 1730 1731 ret = zfs_prop_set_list(zhp, nvl); 1732 1733 error: 1734 nvlist_free(nvl); 1735 return (ret); 1736 } 1737 1738 1739 1740 /* 1741 * Given an nvlist of property names and values, set the properties for the 1742 * given dataset. 1743 */ 1744 int 1745 zfs_prop_set_list(zfs_handle_t *zhp, nvlist_t *props) 1746 { 1747 zfs_cmd_t zc = {"\0"}; 1748 int ret = -1; 1749 prop_changelist_t **cls = NULL; 1750 int cl_idx; 1751 char errbuf[1024]; 1752 libzfs_handle_t *hdl = zhp->zfs_hdl; 1753 nvlist_t *nvl; 1754 int nvl_len = 0; 1755 int added_resv = 0; 1756 zfs_prop_t prop = 0; 1757 nvpair_t *elem; 1758 1759 (void) snprintf(errbuf, sizeof (errbuf), 1760 dgettext(TEXT_DOMAIN, "cannot set property for '%s'"), 1761 zhp->zfs_name); 1762 1763 if ((nvl = zfs_valid_proplist(hdl, zhp->zfs_type, props, 1764 zfs_prop_get_int(zhp, ZFS_PROP_ZONED), zhp, zhp->zpool_hdl, 1765 B_FALSE, errbuf)) == NULL) 1766 goto error; 1767 1768 /* 1769 * We have to check for any extra properties which need to be added 1770 * before computing the length of the nvlist. 1771 */ 1772 for (elem = nvlist_next_nvpair(nvl, NULL); 1773 elem != NULL; 1774 elem = nvlist_next_nvpair(nvl, elem)) { 1775 if (zfs_name_to_prop(nvpair_name(elem)) == ZFS_PROP_VOLSIZE && 1776 (added_resv = zfs_add_synthetic_resv(zhp, nvl)) == -1) { 1777 goto error; 1778 } 1779 } 1780 1781 if (added_resv != 1 && 1782 (added_resv = zfs_fix_auto_resv(zhp, nvl)) == -1) { 1783 goto error; 1784 } 1785 1786 /* 1787 * Check how many properties we're setting and allocate an array to 1788 * store changelist pointers for postfix(). 1789 */ 1790 for (elem = nvlist_next_nvpair(nvl, NULL); 1791 elem != NULL; 1792 elem = nvlist_next_nvpair(nvl, elem)) 1793 nvl_len++; 1794 if ((cls = calloc(nvl_len, sizeof (prop_changelist_t *))) == NULL) 1795 goto error; 1796 1797 cl_idx = 0; 1798 for (elem = nvlist_next_nvpair(nvl, NULL); 1799 elem != NULL; 1800 elem = nvlist_next_nvpair(nvl, elem)) { 1801 1802 prop = zfs_name_to_prop(nvpair_name(elem)); 1803 1804 assert(cl_idx < nvl_len); 1805 /* 1806 * We don't want to unmount & remount the dataset when changing 1807 * its canmount property to 'on' or 'noauto'. We only use 1808 * the changelist logic to unmount when setting canmount=off. 1809 */ 1810 if (prop != ZFS_PROP_CANMOUNT || 1811 (fnvpair_value_uint64(elem) == ZFS_CANMOUNT_OFF && 1812 zfs_is_mounted(zhp, NULL))) { 1813 cls[cl_idx] = changelist_gather(zhp, prop, 0, 0); 1814 if (cls[cl_idx] == NULL) 1815 goto error; 1816 } 1817 1818 if (prop == ZFS_PROP_MOUNTPOINT && 1819 changelist_haszonedchild(cls[cl_idx])) { 1820 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1821 "child dataset with inherited mountpoint is used " 1822 "in a non-global zone")); 1823 ret = zfs_error(hdl, EZFS_ZONED, errbuf); 1824 goto error; 1825 } 1826 1827 if (cls[cl_idx] != NULL && 1828 (ret = changelist_prefix(cls[cl_idx])) != 0) 1829 goto error; 1830 1831 cl_idx++; 1832 } 1833 assert(cl_idx == nvl_len); 1834 1835 /* 1836 * Execute the corresponding ioctl() to set this list of properties. 1837 */ 1838 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 1839 1840 if ((ret = zcmd_write_src_nvlist(hdl, &zc, nvl)) != 0 || 1841 (ret = zcmd_alloc_dst_nvlist(hdl, &zc, 0)) != 0) 1842 goto error; 1843 1844 ret = zfs_ioctl(hdl, ZFS_IOC_SET_PROP, &zc); 1845 1846 if (ret != 0) { 1847 if (zc.zc_nvlist_dst_filled == B_FALSE) { 1848 (void) zfs_standard_error(hdl, errno, errbuf); 1849 goto error; 1850 } 1851 1852 /* Get the list of unset properties back and report them. */ 1853 nvlist_t *errorprops = NULL; 1854 if (zcmd_read_dst_nvlist(hdl, &zc, &errorprops) != 0) 1855 goto error; 1856 for (nvpair_t *elem = nvlist_next_nvpair(errorprops, NULL); 1857 elem != NULL; 1858 elem = nvlist_next_nvpair(errorprops, elem)) { 1859 prop = zfs_name_to_prop(nvpair_name(elem)); 1860 zfs_setprop_error(hdl, prop, errno, errbuf); 1861 } 1862 nvlist_free(errorprops); 1863 1864 if (added_resv && errno == ENOSPC) { 1865 /* clean up the volsize property we tried to set */ 1866 uint64_t old_volsize = zfs_prop_get_int(zhp, 1867 ZFS_PROP_VOLSIZE); 1868 nvlist_free(nvl); 1869 nvl = NULL; 1870 zcmd_free_nvlists(&zc); 1871 1872 if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0) 1873 goto error; 1874 if (nvlist_add_uint64(nvl, 1875 zfs_prop_to_name(ZFS_PROP_VOLSIZE), 1876 old_volsize) != 0) 1877 goto error; 1878 if (zcmd_write_src_nvlist(hdl, &zc, nvl) != 0) 1879 goto error; 1880 (void) zfs_ioctl(hdl, ZFS_IOC_SET_PROP, &zc); 1881 } 1882 } else { 1883 for (cl_idx = 0; cl_idx < nvl_len; cl_idx++) { 1884 if (cls[cl_idx] != NULL) { 1885 int clp_err = changelist_postfix(cls[cl_idx]); 1886 if (clp_err != 0) 1887 ret = clp_err; 1888 } 1889 } 1890 1891 if (ret == 0) { 1892 /* 1893 * Refresh the statistics so the new property 1894 * value is reflected. 1895 */ 1896 (void) get_stats(zhp); 1897 1898 /* 1899 * Remount the filesystem to propagate the change 1900 * if one of the options handled by the generic 1901 * Linux namespace layer has been modified. 1902 */ 1903 if (zfs_is_namespace_prop(prop) && 1904 zfs_is_mounted(zhp, NULL)) 1905 ret = zfs_mount(zhp, MNTOPT_REMOUNT, 0); 1906 } 1907 } 1908 1909 error: 1910 nvlist_free(nvl); 1911 zcmd_free_nvlists(&zc); 1912 if (cls != NULL) { 1913 for (cl_idx = 0; cl_idx < nvl_len; cl_idx++) { 1914 if (cls[cl_idx] != NULL) 1915 changelist_free(cls[cl_idx]); 1916 } 1917 free(cls); 1918 } 1919 return (ret); 1920 } 1921 1922 /* 1923 * Given a property, inherit the value from the parent dataset, or if received 1924 * is TRUE, revert to the received value, if any. 1925 */ 1926 int 1927 zfs_prop_inherit(zfs_handle_t *zhp, const char *propname, boolean_t received) 1928 { 1929 zfs_cmd_t zc = {"\0"}; 1930 int ret; 1931 prop_changelist_t *cl; 1932 libzfs_handle_t *hdl = zhp->zfs_hdl; 1933 char errbuf[1024]; 1934 zfs_prop_t prop; 1935 1936 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 1937 "cannot inherit %s for '%s'"), propname, zhp->zfs_name); 1938 1939 zc.zc_cookie = received; 1940 if ((prop = zfs_name_to_prop(propname)) == ZPROP_INVAL) { 1941 /* 1942 * For user properties, the amount of work we have to do is very 1943 * small, so just do it here. 1944 */ 1945 if (!zfs_prop_user(propname)) { 1946 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1947 "invalid property")); 1948 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 1949 } 1950 1951 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 1952 (void) strlcpy(zc.zc_value, propname, sizeof (zc.zc_value)); 1953 1954 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_INHERIT_PROP, &zc) != 0) 1955 return (zfs_standard_error(hdl, errno, errbuf)); 1956 1957 return (0); 1958 } 1959 1960 /* 1961 * Verify that this property is inheritable. 1962 */ 1963 if (zfs_prop_readonly(prop)) 1964 return (zfs_error(hdl, EZFS_PROPREADONLY, errbuf)); 1965 1966 if (!zfs_prop_inheritable(prop) && !received) 1967 return (zfs_error(hdl, EZFS_PROPNONINHERIT, errbuf)); 1968 1969 /* 1970 * Check to see if the value applies to this type 1971 */ 1972 if (!zfs_prop_valid_for_type(prop, zhp->zfs_type, B_FALSE)) 1973 return (zfs_error(hdl, EZFS_PROPTYPE, errbuf)); 1974 1975 /* 1976 * Normalize the name, to get rid of shorthand abbreviations. 1977 */ 1978 propname = zfs_prop_to_name(prop); 1979 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 1980 (void) strlcpy(zc.zc_value, propname, sizeof (zc.zc_value)); 1981 1982 if (prop == ZFS_PROP_MOUNTPOINT && getzoneid() == GLOBAL_ZONEID && 1983 zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) { 1984 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1985 "dataset is used in a non-global zone")); 1986 return (zfs_error(hdl, EZFS_ZONED, errbuf)); 1987 } 1988 1989 /* 1990 * Determine datasets which will be affected by this change, if any. 1991 */ 1992 if ((cl = changelist_gather(zhp, prop, 0, 0)) == NULL) 1993 return (-1); 1994 1995 if (prop == ZFS_PROP_MOUNTPOINT && changelist_haszonedchild(cl)) { 1996 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1997 "child dataset with inherited mountpoint is used " 1998 "in a non-global zone")); 1999 ret = zfs_error(hdl, EZFS_ZONED, errbuf); 2000 goto error; 2001 } 2002 2003 if ((ret = changelist_prefix(cl)) != 0) 2004 goto error; 2005 2006 if ((ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_INHERIT_PROP, &zc)) != 0) { 2007 return (zfs_standard_error(hdl, errno, errbuf)); 2008 } else { 2009 2010 if ((ret = changelist_postfix(cl)) != 0) 2011 goto error; 2012 2013 /* 2014 * Refresh the statistics so the new property is reflected. 2015 */ 2016 (void) get_stats(zhp); 2017 2018 /* 2019 * Remount the filesystem to propagate the change 2020 * if one of the options handled by the generic 2021 * Linux namespace layer has been modified. 2022 */ 2023 if (zfs_is_namespace_prop(prop) && 2024 zfs_is_mounted(zhp, NULL)) 2025 ret = zfs_mount(zhp, MNTOPT_REMOUNT, 0); 2026 } 2027 2028 error: 2029 changelist_free(cl); 2030 return (ret); 2031 } 2032 2033 /* 2034 * True DSL properties are stored in an nvlist. The following two functions 2035 * extract them appropriately. 2036 */ 2037 uint64_t 2038 getprop_uint64(zfs_handle_t *zhp, zfs_prop_t prop, char **source) 2039 { 2040 nvlist_t *nv; 2041 uint64_t value; 2042 2043 *source = NULL; 2044 if (nvlist_lookup_nvlist(zhp->zfs_props, 2045 zfs_prop_to_name(prop), &nv) == 0) { 2046 verify(nvlist_lookup_uint64(nv, ZPROP_VALUE, &value) == 0); 2047 (void) nvlist_lookup_string(nv, ZPROP_SOURCE, source); 2048 } else { 2049 verify(!zhp->zfs_props_table || 2050 zhp->zfs_props_table[prop] == B_TRUE); 2051 value = zfs_prop_default_numeric(prop); 2052 *source = ""; 2053 } 2054 2055 return (value); 2056 } 2057 2058 static const char * 2059 getprop_string(zfs_handle_t *zhp, zfs_prop_t prop, char **source) 2060 { 2061 nvlist_t *nv; 2062 const char *value; 2063 2064 *source = NULL; 2065 if (nvlist_lookup_nvlist(zhp->zfs_props, 2066 zfs_prop_to_name(prop), &nv) == 0) { 2067 value = fnvlist_lookup_string(nv, ZPROP_VALUE); 2068 (void) nvlist_lookup_string(nv, ZPROP_SOURCE, source); 2069 } else { 2070 verify(!zhp->zfs_props_table || 2071 zhp->zfs_props_table[prop] == B_TRUE); 2072 value = zfs_prop_default_string(prop); 2073 *source = ""; 2074 } 2075 2076 return (value); 2077 } 2078 2079 static boolean_t 2080 zfs_is_recvd_props_mode(zfs_handle_t *zhp) 2081 { 2082 return (zhp->zfs_props == zhp->zfs_recvd_props); 2083 } 2084 2085 static void 2086 zfs_set_recvd_props_mode(zfs_handle_t *zhp, uint64_t *cookie) 2087 { 2088 *cookie = (uint64_t)(uintptr_t)zhp->zfs_props; 2089 zhp->zfs_props = zhp->zfs_recvd_props; 2090 } 2091 2092 static void 2093 zfs_unset_recvd_props_mode(zfs_handle_t *zhp, uint64_t *cookie) 2094 { 2095 zhp->zfs_props = (nvlist_t *)(uintptr_t)*cookie; 2096 *cookie = 0; 2097 } 2098 2099 /* 2100 * Internal function for getting a numeric property. Both zfs_prop_get() and 2101 * zfs_prop_get_int() are built using this interface. 2102 * 2103 * Certain properties can be overridden using 'mount -o'. In this case, scan 2104 * the contents of the /proc/self/mounts entry, searching for the 2105 * appropriate options. If they differ from the on-disk values, report the 2106 * current values and mark the source "temporary". 2107 */ 2108 static int 2109 get_numeric_property(zfs_handle_t *zhp, zfs_prop_t prop, zprop_source_t *src, 2110 char **source, uint64_t *val) 2111 { 2112 zfs_cmd_t zc = {"\0"}; 2113 nvlist_t *zplprops = NULL; 2114 struct mnttab mnt; 2115 char *mntopt_on = NULL; 2116 char *mntopt_off = NULL; 2117 boolean_t received = zfs_is_recvd_props_mode(zhp); 2118 2119 *source = NULL; 2120 2121 /* 2122 * If the property is being fetched for a snapshot, check whether 2123 * the property is valid for the snapshot's head dataset type. 2124 */ 2125 if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT && 2126 !zfs_prop_valid_for_type(prop, zhp->zfs_head_type, B_TRUE)) { 2127 *val = zfs_prop_default_numeric(prop); 2128 return (-1); 2129 } 2130 2131 switch (prop) { 2132 case ZFS_PROP_ATIME: 2133 mntopt_on = MNTOPT_ATIME; 2134 mntopt_off = MNTOPT_NOATIME; 2135 break; 2136 2137 case ZFS_PROP_RELATIME: 2138 mntopt_on = MNTOPT_RELATIME; 2139 mntopt_off = MNTOPT_NORELATIME; 2140 break; 2141 2142 case ZFS_PROP_DEVICES: 2143 mntopt_on = MNTOPT_DEVICES; 2144 mntopt_off = MNTOPT_NODEVICES; 2145 break; 2146 2147 case ZFS_PROP_EXEC: 2148 mntopt_on = MNTOPT_EXEC; 2149 mntopt_off = MNTOPT_NOEXEC; 2150 break; 2151 2152 case ZFS_PROP_READONLY: 2153 mntopt_on = MNTOPT_RO; 2154 mntopt_off = MNTOPT_RW; 2155 break; 2156 2157 case ZFS_PROP_SETUID: 2158 mntopt_on = MNTOPT_SETUID; 2159 mntopt_off = MNTOPT_NOSETUID; 2160 break; 2161 2162 case ZFS_PROP_XATTR: 2163 mntopt_on = MNTOPT_XATTR; 2164 mntopt_off = MNTOPT_NOXATTR; 2165 break; 2166 2167 case ZFS_PROP_NBMAND: 2168 mntopt_on = MNTOPT_NBMAND; 2169 mntopt_off = MNTOPT_NONBMAND; 2170 break; 2171 2172 default: 2173 break; 2174 } 2175 2176 /* 2177 * Because looking up the mount options is potentially expensive 2178 * (iterating over all of /proc/self/mounts), we defer its 2179 * calculation until we're looking up a property which requires 2180 * its presence. 2181 */ 2182 if (!zhp->zfs_mntcheck && 2183 (mntopt_on != NULL || prop == ZFS_PROP_MOUNTED)) { 2184 libzfs_handle_t *hdl = zhp->zfs_hdl; 2185 struct mnttab entry; 2186 2187 if (libzfs_mnttab_find(hdl, zhp->zfs_name, &entry) == 0) { 2188 zhp->zfs_mntopts = zfs_strdup(hdl, 2189 entry.mnt_mntopts); 2190 if (zhp->zfs_mntopts == NULL) 2191 return (-1); 2192 } 2193 2194 zhp->zfs_mntcheck = B_TRUE; 2195 } 2196 2197 if (zhp->zfs_mntopts == NULL) 2198 mnt.mnt_mntopts = ""; 2199 else 2200 mnt.mnt_mntopts = zhp->zfs_mntopts; 2201 2202 switch (prop) { 2203 case ZFS_PROP_ATIME: 2204 case ZFS_PROP_RELATIME: 2205 case ZFS_PROP_DEVICES: 2206 case ZFS_PROP_EXEC: 2207 case ZFS_PROP_READONLY: 2208 case ZFS_PROP_SETUID: 2209 #ifndef __FreeBSD__ 2210 case ZFS_PROP_XATTR: 2211 #endif 2212 case ZFS_PROP_NBMAND: 2213 *val = getprop_uint64(zhp, prop, source); 2214 2215 if (received) 2216 break; 2217 2218 if (hasmntopt(&mnt, mntopt_on) && !*val) { 2219 *val = B_TRUE; 2220 if (src) 2221 *src = ZPROP_SRC_TEMPORARY; 2222 } else if (hasmntopt(&mnt, mntopt_off) && *val) { 2223 *val = B_FALSE; 2224 if (src) 2225 *src = ZPROP_SRC_TEMPORARY; 2226 } 2227 break; 2228 2229 case ZFS_PROP_CANMOUNT: 2230 case ZFS_PROP_VOLSIZE: 2231 case ZFS_PROP_QUOTA: 2232 case ZFS_PROP_REFQUOTA: 2233 case ZFS_PROP_RESERVATION: 2234 case ZFS_PROP_REFRESERVATION: 2235 case ZFS_PROP_FILESYSTEM_LIMIT: 2236 case ZFS_PROP_SNAPSHOT_LIMIT: 2237 case ZFS_PROP_FILESYSTEM_COUNT: 2238 case ZFS_PROP_SNAPSHOT_COUNT: 2239 *val = getprop_uint64(zhp, prop, source); 2240 2241 if (*source == NULL) { 2242 /* not default, must be local */ 2243 *source = zhp->zfs_name; 2244 } 2245 break; 2246 2247 case ZFS_PROP_MOUNTED: 2248 *val = (zhp->zfs_mntopts != NULL); 2249 break; 2250 2251 case ZFS_PROP_NUMCLONES: 2252 *val = zhp->zfs_dmustats.dds_num_clones; 2253 break; 2254 2255 case ZFS_PROP_VERSION: 2256 case ZFS_PROP_NORMALIZE: 2257 case ZFS_PROP_UTF8ONLY: 2258 case ZFS_PROP_CASE: 2259 if (zcmd_alloc_dst_nvlist(zhp->zfs_hdl, &zc, 0) != 0) 2260 return (-1); 2261 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 2262 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_OBJSET_ZPLPROPS, &zc)) { 2263 zcmd_free_nvlists(&zc); 2264 if (prop == ZFS_PROP_VERSION && 2265 zhp->zfs_type == ZFS_TYPE_VOLUME) 2266 *val = zfs_prop_default_numeric(prop); 2267 return (-1); 2268 } 2269 if (zcmd_read_dst_nvlist(zhp->zfs_hdl, &zc, &zplprops) != 0 || 2270 nvlist_lookup_uint64(zplprops, zfs_prop_to_name(prop), 2271 val) != 0) { 2272 zcmd_free_nvlists(&zc); 2273 return (-1); 2274 } 2275 nvlist_free(zplprops); 2276 zcmd_free_nvlists(&zc); 2277 break; 2278 2279 case ZFS_PROP_INCONSISTENT: 2280 *val = zhp->zfs_dmustats.dds_inconsistent; 2281 break; 2282 2283 case ZFS_PROP_REDACTED: 2284 *val = zhp->zfs_dmustats.dds_redacted; 2285 break; 2286 2287 default: 2288 switch (zfs_prop_get_type(prop)) { 2289 case PROP_TYPE_NUMBER: 2290 case PROP_TYPE_INDEX: 2291 *val = getprop_uint64(zhp, prop, source); 2292 /* 2293 * If we tried to use a default value for a 2294 * readonly property, it means that it was not 2295 * present. Note this only applies to "truly" 2296 * readonly properties, not set-once properties 2297 * like volblocksize. 2298 */ 2299 if (zfs_prop_readonly(prop) && 2300 !zfs_prop_setonce(prop) && 2301 *source != NULL && (*source)[0] == '\0') { 2302 *source = NULL; 2303 return (-1); 2304 } 2305 break; 2306 2307 case PROP_TYPE_STRING: 2308 default: 2309 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN, 2310 "cannot get non-numeric property")); 2311 return (zfs_error(zhp->zfs_hdl, EZFS_BADPROP, 2312 dgettext(TEXT_DOMAIN, "internal error"))); 2313 } 2314 } 2315 2316 return (0); 2317 } 2318 2319 /* 2320 * Calculate the source type, given the raw source string. 2321 */ 2322 static void 2323 get_source(zfs_handle_t *zhp, zprop_source_t *srctype, char *source, 2324 char *statbuf, size_t statlen) 2325 { 2326 if (statbuf == NULL || 2327 srctype == NULL || *srctype == ZPROP_SRC_TEMPORARY) { 2328 return; 2329 } 2330 2331 if (source == NULL) { 2332 *srctype = ZPROP_SRC_NONE; 2333 } else if (source[0] == '\0') { 2334 *srctype = ZPROP_SRC_DEFAULT; 2335 } else if (strstr(source, ZPROP_SOURCE_VAL_RECVD) != NULL) { 2336 *srctype = ZPROP_SRC_RECEIVED; 2337 } else { 2338 if (strcmp(source, zhp->zfs_name) == 0) { 2339 *srctype = ZPROP_SRC_LOCAL; 2340 } else { 2341 (void) strlcpy(statbuf, source, statlen); 2342 *srctype = ZPROP_SRC_INHERITED; 2343 } 2344 } 2345 2346 } 2347 2348 int 2349 zfs_prop_get_recvd(zfs_handle_t *zhp, const char *propname, char *propbuf, 2350 size_t proplen, boolean_t literal) 2351 { 2352 zfs_prop_t prop; 2353 int err = 0; 2354 2355 if (zhp->zfs_recvd_props == NULL) 2356 if (get_recvd_props_ioctl(zhp) != 0) 2357 return (-1); 2358 2359 prop = zfs_name_to_prop(propname); 2360 2361 if (prop != ZPROP_INVAL) { 2362 uint64_t cookie; 2363 if (!nvlist_exists(zhp->zfs_recvd_props, propname)) 2364 return (-1); 2365 zfs_set_recvd_props_mode(zhp, &cookie); 2366 err = zfs_prop_get(zhp, prop, propbuf, proplen, 2367 NULL, NULL, 0, literal); 2368 zfs_unset_recvd_props_mode(zhp, &cookie); 2369 } else { 2370 nvlist_t *propval; 2371 char *recvdval; 2372 if (nvlist_lookup_nvlist(zhp->zfs_recvd_props, 2373 propname, &propval) != 0) 2374 return (-1); 2375 verify(nvlist_lookup_string(propval, ZPROP_VALUE, 2376 &recvdval) == 0); 2377 (void) strlcpy(propbuf, recvdval, proplen); 2378 } 2379 2380 return (err == 0 ? 0 : -1); 2381 } 2382 2383 static int 2384 get_clones_string(zfs_handle_t *zhp, char *propbuf, size_t proplen) 2385 { 2386 nvlist_t *value; 2387 nvpair_t *pair; 2388 2389 value = zfs_get_clones_nvl(zhp); 2390 if (value == NULL) 2391 return (-1); 2392 2393 propbuf[0] = '\0'; 2394 for (pair = nvlist_next_nvpair(value, NULL); pair != NULL; 2395 pair = nvlist_next_nvpair(value, pair)) { 2396 if (propbuf[0] != '\0') 2397 (void) strlcat(propbuf, ",", proplen); 2398 (void) strlcat(propbuf, nvpair_name(pair), proplen); 2399 } 2400 2401 return (0); 2402 } 2403 2404 struct get_clones_arg { 2405 uint64_t numclones; 2406 nvlist_t *value; 2407 const char *origin; 2408 char buf[ZFS_MAX_DATASET_NAME_LEN]; 2409 }; 2410 2411 static int 2412 get_clones_cb(zfs_handle_t *zhp, void *arg) 2413 { 2414 struct get_clones_arg *gca = arg; 2415 2416 if (gca->numclones == 0) { 2417 zfs_close(zhp); 2418 return (0); 2419 } 2420 2421 if (zfs_prop_get(zhp, ZFS_PROP_ORIGIN, gca->buf, sizeof (gca->buf), 2422 NULL, NULL, 0, B_TRUE) != 0) 2423 goto out; 2424 if (strcmp(gca->buf, gca->origin) == 0) { 2425 fnvlist_add_boolean(gca->value, zfs_get_name(zhp)); 2426 gca->numclones--; 2427 } 2428 2429 out: 2430 (void) zfs_iter_children(zhp, get_clones_cb, gca); 2431 zfs_close(zhp); 2432 return (0); 2433 } 2434 2435 nvlist_t * 2436 zfs_get_clones_nvl(zfs_handle_t *zhp) 2437 { 2438 nvlist_t *nv, *value; 2439 2440 if (nvlist_lookup_nvlist(zhp->zfs_props, 2441 zfs_prop_to_name(ZFS_PROP_CLONES), &nv) != 0) { 2442 struct get_clones_arg gca; 2443 2444 /* 2445 * if this is a snapshot, then the kernel wasn't able 2446 * to get the clones. Do it by slowly iterating. 2447 */ 2448 if (zhp->zfs_type != ZFS_TYPE_SNAPSHOT) 2449 return (NULL); 2450 if (nvlist_alloc(&nv, NV_UNIQUE_NAME, 0) != 0) 2451 return (NULL); 2452 if (nvlist_alloc(&value, NV_UNIQUE_NAME, 0) != 0) { 2453 nvlist_free(nv); 2454 return (NULL); 2455 } 2456 2457 gca.numclones = zfs_prop_get_int(zhp, ZFS_PROP_NUMCLONES); 2458 gca.value = value; 2459 gca.origin = zhp->zfs_name; 2460 2461 if (gca.numclones != 0) { 2462 zfs_handle_t *root; 2463 char pool[ZFS_MAX_DATASET_NAME_LEN]; 2464 char *cp = pool; 2465 2466 /* get the pool name */ 2467 (void) strlcpy(pool, zhp->zfs_name, sizeof (pool)); 2468 (void) strsep(&cp, "/@"); 2469 root = zfs_open(zhp->zfs_hdl, pool, 2470 ZFS_TYPE_FILESYSTEM); 2471 if (root == NULL) { 2472 nvlist_free(nv); 2473 nvlist_free(value); 2474 return (NULL); 2475 } 2476 2477 (void) get_clones_cb(root, &gca); 2478 } 2479 2480 if (gca.numclones != 0 || 2481 nvlist_add_nvlist(nv, ZPROP_VALUE, value) != 0 || 2482 nvlist_add_nvlist(zhp->zfs_props, 2483 zfs_prop_to_name(ZFS_PROP_CLONES), nv) != 0) { 2484 nvlist_free(nv); 2485 nvlist_free(value); 2486 return (NULL); 2487 } 2488 nvlist_free(nv); 2489 nvlist_free(value); 2490 verify(0 == nvlist_lookup_nvlist(zhp->zfs_props, 2491 zfs_prop_to_name(ZFS_PROP_CLONES), &nv)); 2492 } 2493 2494 verify(nvlist_lookup_nvlist(nv, ZPROP_VALUE, &value) == 0); 2495 2496 return (value); 2497 } 2498 2499 static int 2500 get_rsnaps_string(zfs_handle_t *zhp, char *propbuf, size_t proplen) 2501 { 2502 nvlist_t *value; 2503 uint64_t *snaps; 2504 uint_t nsnaps; 2505 2506 if (nvlist_lookup_nvlist(zhp->zfs_props, 2507 zfs_prop_to_name(ZFS_PROP_REDACT_SNAPS), &value) != 0) 2508 return (-1); 2509 if (nvlist_lookup_uint64_array(value, ZPROP_VALUE, &snaps, 2510 &nsnaps) != 0) 2511 return (-1); 2512 if (nsnaps == 0) { 2513 /* There's no redaction snapshots; pass a special value back */ 2514 (void) snprintf(propbuf, proplen, "none"); 2515 return (0); 2516 } 2517 propbuf[0] = '\0'; 2518 for (int i = 0; i < nsnaps; i++) { 2519 char buf[128]; 2520 if (propbuf[0] != '\0') 2521 (void) strlcat(propbuf, ",", proplen); 2522 (void) snprintf(buf, sizeof (buf), "%llu", 2523 (u_longlong_t)snaps[i]); 2524 (void) strlcat(propbuf, buf, proplen); 2525 } 2526 2527 return (0); 2528 } 2529 2530 /* 2531 * Accepts a property and value and checks that the value 2532 * matches the one found by the channel program. If they are 2533 * not equal, print both of them. 2534 */ 2535 static void 2536 zcp_check(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t intval, 2537 const char *strval) 2538 { 2539 if (!zhp->zfs_hdl->libzfs_prop_debug) 2540 return; 2541 int error; 2542 char *poolname = zhp->zpool_hdl->zpool_name; 2543 const char *prop_name = zfs_prop_to_name(prop); 2544 const char *program = 2545 "args = ...\n" 2546 "ds = args['dataset']\n" 2547 "prop = args['property']\n" 2548 "value, setpoint = zfs.get_prop(ds, prop)\n" 2549 "return {value=value, setpoint=setpoint}\n"; 2550 nvlist_t *outnvl; 2551 nvlist_t *retnvl; 2552 nvlist_t *argnvl = fnvlist_alloc(); 2553 2554 fnvlist_add_string(argnvl, "dataset", zhp->zfs_name); 2555 fnvlist_add_string(argnvl, "property", zfs_prop_to_name(prop)); 2556 2557 error = lzc_channel_program_nosync(poolname, program, 2558 10 * 1000 * 1000, 10 * 1024 * 1024, argnvl, &outnvl); 2559 2560 if (error == 0) { 2561 retnvl = fnvlist_lookup_nvlist(outnvl, "return"); 2562 if (zfs_prop_get_type(prop) == PROP_TYPE_NUMBER) { 2563 int64_t ans; 2564 error = nvlist_lookup_int64(retnvl, "value", &ans); 2565 if (error != 0) { 2566 (void) fprintf(stderr, "%s: zcp check error: " 2567 "%u\n", prop_name, error); 2568 return; 2569 } 2570 if (ans != intval) { 2571 (void) fprintf(stderr, "%s: zfs found %llu, " 2572 "but zcp found %llu\n", prop_name, 2573 (u_longlong_t)intval, (u_longlong_t)ans); 2574 } 2575 } else { 2576 char *str_ans; 2577 error = nvlist_lookup_string(retnvl, "value", &str_ans); 2578 if (error != 0) { 2579 (void) fprintf(stderr, "%s: zcp check error: " 2580 "%u\n", prop_name, error); 2581 return; 2582 } 2583 if (strcmp(strval, str_ans) != 0) { 2584 (void) fprintf(stderr, 2585 "%s: zfs found '%s', but zcp found '%s'\n", 2586 prop_name, strval, str_ans); 2587 } 2588 } 2589 } else { 2590 (void) fprintf(stderr, "%s: zcp check failed, channel program " 2591 "error: %u\n", prop_name, error); 2592 } 2593 nvlist_free(argnvl); 2594 nvlist_free(outnvl); 2595 } 2596 2597 /* 2598 * Retrieve a property from the given object. If 'literal' is specified, then 2599 * numbers are left as exact values. Otherwise, numbers are converted to a 2600 * human-readable form. 2601 * 2602 * Returns 0 on success, or -1 on error. 2603 */ 2604 int 2605 zfs_prop_get(zfs_handle_t *zhp, zfs_prop_t prop, char *propbuf, size_t proplen, 2606 zprop_source_t *src, char *statbuf, size_t statlen, boolean_t literal) 2607 { 2608 char *source = NULL; 2609 uint64_t val; 2610 const char *str; 2611 const char *strval; 2612 boolean_t received = zfs_is_recvd_props_mode(zhp); 2613 2614 /* 2615 * Check to see if this property applies to our object 2616 */ 2617 if (!zfs_prop_valid_for_type(prop, zhp->zfs_type, B_FALSE)) 2618 return (-1); 2619 2620 if (received && zfs_prop_readonly(prop)) 2621 return (-1); 2622 2623 if (src) 2624 *src = ZPROP_SRC_NONE; 2625 2626 switch (prop) { 2627 case ZFS_PROP_CREATION: 2628 /* 2629 * 'creation' is a time_t stored in the statistics. We convert 2630 * this into a string unless 'literal' is specified. 2631 */ 2632 { 2633 val = getprop_uint64(zhp, prop, &source); 2634 time_t time = (time_t)val; 2635 struct tm t; 2636 2637 if (literal || 2638 localtime_r(&time, &t) == NULL || 2639 strftime(propbuf, proplen, "%a %b %e %k:%M %Y", 2640 &t) == 0) 2641 (void) snprintf(propbuf, proplen, "%llu", 2642 (u_longlong_t)val); 2643 } 2644 zcp_check(zhp, prop, val, NULL); 2645 break; 2646 2647 case ZFS_PROP_MOUNTPOINT: 2648 /* 2649 * Getting the precise mountpoint can be tricky. 2650 * 2651 * - for 'none' or 'legacy', return those values. 2652 * - for inherited mountpoints, we want to take everything 2653 * after our ancestor and append it to the inherited value. 2654 * 2655 * If the pool has an alternate root, we want to prepend that 2656 * root to any values we return. 2657 */ 2658 2659 str = getprop_string(zhp, prop, &source); 2660 2661 if (str[0] == '/') { 2662 char buf[MAXPATHLEN]; 2663 char *root = buf; 2664 const char *relpath; 2665 2666 /* 2667 * If we inherit the mountpoint, even from a dataset 2668 * with a received value, the source will be the path of 2669 * the dataset we inherit from. If source is 2670 * ZPROP_SOURCE_VAL_RECVD, the received value is not 2671 * inherited. 2672 */ 2673 if (strcmp(source, ZPROP_SOURCE_VAL_RECVD) == 0) { 2674 relpath = ""; 2675 } else { 2676 relpath = zhp->zfs_name + strlen(source); 2677 if (relpath[0] == '/') 2678 relpath++; 2679 } 2680 2681 if ((zpool_get_prop(zhp->zpool_hdl, 2682 ZPOOL_PROP_ALTROOT, buf, MAXPATHLEN, NULL, 2683 B_FALSE)) || (strcmp(root, "-") == 0)) 2684 root[0] = '\0'; 2685 /* 2686 * Special case an alternate root of '/'. This will 2687 * avoid having multiple leading slashes in the 2688 * mountpoint path. 2689 */ 2690 if (strcmp(root, "/") == 0) 2691 root++; 2692 2693 /* 2694 * If the mountpoint is '/' then skip over this 2695 * if we are obtaining either an alternate root or 2696 * an inherited mountpoint. 2697 */ 2698 if (str[1] == '\0' && (root[0] != '\0' || 2699 relpath[0] != '\0')) 2700 str++; 2701 2702 if (relpath[0] == '\0') 2703 (void) snprintf(propbuf, proplen, "%s%s", 2704 root, str); 2705 else 2706 (void) snprintf(propbuf, proplen, "%s%s%s%s", 2707 root, str, relpath[0] == '@' ? "" : "/", 2708 relpath); 2709 } else { 2710 /* 'legacy' or 'none' */ 2711 (void) strlcpy(propbuf, str, proplen); 2712 } 2713 zcp_check(zhp, prop, 0, propbuf); 2714 break; 2715 2716 case ZFS_PROP_ORIGIN: 2717 str = getprop_string(zhp, prop, &source); 2718 if (str == NULL) 2719 return (-1); 2720 (void) strlcpy(propbuf, str, proplen); 2721 zcp_check(zhp, prop, 0, str); 2722 break; 2723 2724 case ZFS_PROP_REDACT_SNAPS: 2725 if (get_rsnaps_string(zhp, propbuf, proplen) != 0) 2726 return (-1); 2727 break; 2728 2729 case ZFS_PROP_CLONES: 2730 if (get_clones_string(zhp, propbuf, proplen) != 0) 2731 return (-1); 2732 break; 2733 2734 case ZFS_PROP_QUOTA: 2735 case ZFS_PROP_REFQUOTA: 2736 case ZFS_PROP_RESERVATION: 2737 case ZFS_PROP_REFRESERVATION: 2738 2739 if (get_numeric_property(zhp, prop, src, &source, &val) != 0) 2740 return (-1); 2741 /* 2742 * If quota or reservation is 0, we translate this into 'none' 2743 * (unless literal is set), and indicate that it's the default 2744 * value. Otherwise, we print the number nicely and indicate 2745 * that its set locally. 2746 */ 2747 if (val == 0) { 2748 if (literal) 2749 (void) strlcpy(propbuf, "0", proplen); 2750 else 2751 (void) strlcpy(propbuf, "none", proplen); 2752 } else { 2753 if (literal) 2754 (void) snprintf(propbuf, proplen, "%llu", 2755 (u_longlong_t)val); 2756 else 2757 zfs_nicebytes(val, propbuf, proplen); 2758 } 2759 zcp_check(zhp, prop, val, NULL); 2760 break; 2761 2762 case ZFS_PROP_FILESYSTEM_LIMIT: 2763 case ZFS_PROP_SNAPSHOT_LIMIT: 2764 case ZFS_PROP_FILESYSTEM_COUNT: 2765 case ZFS_PROP_SNAPSHOT_COUNT: 2766 2767 if (get_numeric_property(zhp, prop, src, &source, &val) != 0) 2768 return (-1); 2769 2770 /* 2771 * If limit is UINT64_MAX, we translate this into 'none' (unless 2772 * literal is set), and indicate that it's the default value. 2773 * Otherwise, we print the number nicely and indicate that it's 2774 * set locally. 2775 */ 2776 if (literal) { 2777 (void) snprintf(propbuf, proplen, "%llu", 2778 (u_longlong_t)val); 2779 } else if (val == UINT64_MAX) { 2780 (void) strlcpy(propbuf, "none", proplen); 2781 } else { 2782 zfs_nicenum(val, propbuf, proplen); 2783 } 2784 2785 zcp_check(zhp, prop, val, NULL); 2786 break; 2787 2788 case ZFS_PROP_REFRATIO: 2789 case ZFS_PROP_COMPRESSRATIO: 2790 if (get_numeric_property(zhp, prop, src, &source, &val) != 0) 2791 return (-1); 2792 if (literal) 2793 (void) snprintf(propbuf, proplen, "%llu.%02llu", 2794 (u_longlong_t)(val / 100), 2795 (u_longlong_t)(val % 100)); 2796 else 2797 (void) snprintf(propbuf, proplen, "%llu.%02llux", 2798 (u_longlong_t)(val / 100), 2799 (u_longlong_t)(val % 100)); 2800 zcp_check(zhp, prop, val, NULL); 2801 break; 2802 2803 case ZFS_PROP_TYPE: 2804 switch (zhp->zfs_type) { 2805 case ZFS_TYPE_FILESYSTEM: 2806 str = "filesystem"; 2807 break; 2808 case ZFS_TYPE_VOLUME: 2809 str = "volume"; 2810 break; 2811 case ZFS_TYPE_SNAPSHOT: 2812 str = "snapshot"; 2813 break; 2814 case ZFS_TYPE_BOOKMARK: 2815 str = "bookmark"; 2816 break; 2817 default: 2818 abort(); 2819 } 2820 (void) snprintf(propbuf, proplen, "%s", str); 2821 zcp_check(zhp, prop, 0, propbuf); 2822 break; 2823 2824 case ZFS_PROP_MOUNTED: 2825 /* 2826 * The 'mounted' property is a pseudo-property that described 2827 * whether the filesystem is currently mounted. Even though 2828 * it's a boolean value, the typical values of "on" and "off" 2829 * don't make sense, so we translate to "yes" and "no". 2830 */ 2831 if (get_numeric_property(zhp, ZFS_PROP_MOUNTED, 2832 src, &source, &val) != 0) 2833 return (-1); 2834 if (val) 2835 (void) strlcpy(propbuf, "yes", proplen); 2836 else 2837 (void) strlcpy(propbuf, "no", proplen); 2838 break; 2839 2840 case ZFS_PROP_NAME: 2841 /* 2842 * The 'name' property is a pseudo-property derived from the 2843 * dataset name. It is presented as a real property to simplify 2844 * consumers. 2845 */ 2846 (void) strlcpy(propbuf, zhp->zfs_name, proplen); 2847 zcp_check(zhp, prop, 0, propbuf); 2848 break; 2849 2850 case ZFS_PROP_MLSLABEL: 2851 { 2852 #ifdef HAVE_MLSLABEL 2853 m_label_t *new_sl = NULL; 2854 char *ascii = NULL; /* human readable label */ 2855 2856 (void) strlcpy(propbuf, 2857 getprop_string(zhp, prop, &source), proplen); 2858 2859 if (literal || (strcasecmp(propbuf, 2860 ZFS_MLSLABEL_DEFAULT) == 0)) 2861 break; 2862 2863 /* 2864 * Try to translate the internal hex string to 2865 * human-readable output. If there are any 2866 * problems just use the hex string. 2867 */ 2868 2869 if (str_to_label(propbuf, &new_sl, MAC_LABEL, 2870 L_NO_CORRECTION, NULL) == -1) { 2871 m_label_free(new_sl); 2872 break; 2873 } 2874 2875 if (label_to_str(new_sl, &ascii, M_LABEL, 2876 DEF_NAMES) != 0) { 2877 if (ascii) 2878 free(ascii); 2879 m_label_free(new_sl); 2880 break; 2881 } 2882 m_label_free(new_sl); 2883 2884 (void) strlcpy(propbuf, ascii, proplen); 2885 free(ascii); 2886 #else 2887 (void) strlcpy(propbuf, 2888 getprop_string(zhp, prop, &source), proplen); 2889 #endif /* HAVE_MLSLABEL */ 2890 } 2891 break; 2892 2893 case ZFS_PROP_GUID: 2894 case ZFS_PROP_CREATETXG: 2895 case ZFS_PROP_OBJSETID: 2896 /* 2897 * These properties are stored as numbers, but they are 2898 * identifiers. 2899 * We don't want them to be pretty printed, because pretty 2900 * printing mangles the ID into a truncated and useless value. 2901 */ 2902 if (get_numeric_property(zhp, prop, src, &source, &val) != 0) 2903 return (-1); 2904 (void) snprintf(propbuf, proplen, "%llu", (u_longlong_t)val); 2905 zcp_check(zhp, prop, val, NULL); 2906 break; 2907 2908 case ZFS_PROP_REFERENCED: 2909 case ZFS_PROP_AVAILABLE: 2910 case ZFS_PROP_USED: 2911 case ZFS_PROP_USEDSNAP: 2912 case ZFS_PROP_USEDDS: 2913 case ZFS_PROP_USEDREFRESERV: 2914 case ZFS_PROP_USEDCHILD: 2915 if (get_numeric_property(zhp, prop, src, &source, &val) != 0) 2916 return (-1); 2917 if (literal) { 2918 (void) snprintf(propbuf, proplen, "%llu", 2919 (u_longlong_t)val); 2920 } else { 2921 zfs_nicebytes(val, propbuf, proplen); 2922 } 2923 zcp_check(zhp, prop, val, NULL); 2924 break; 2925 2926 default: 2927 switch (zfs_prop_get_type(prop)) { 2928 case PROP_TYPE_NUMBER: 2929 if (get_numeric_property(zhp, prop, src, 2930 &source, &val) != 0) { 2931 return (-1); 2932 } 2933 2934 if (literal) { 2935 (void) snprintf(propbuf, proplen, "%llu", 2936 (u_longlong_t)val); 2937 } else { 2938 zfs_nicenum(val, propbuf, proplen); 2939 } 2940 zcp_check(zhp, prop, val, NULL); 2941 break; 2942 2943 case PROP_TYPE_STRING: 2944 str = getprop_string(zhp, prop, &source); 2945 if (str == NULL) 2946 return (-1); 2947 2948 (void) strlcpy(propbuf, str, proplen); 2949 zcp_check(zhp, prop, 0, str); 2950 break; 2951 2952 case PROP_TYPE_INDEX: 2953 if (get_numeric_property(zhp, prop, src, 2954 &source, &val) != 0) 2955 return (-1); 2956 if (zfs_prop_index_to_string(prop, val, &strval) != 0) 2957 return (-1); 2958 2959 (void) strlcpy(propbuf, strval, proplen); 2960 zcp_check(zhp, prop, 0, strval); 2961 break; 2962 2963 default: 2964 abort(); 2965 } 2966 } 2967 2968 get_source(zhp, src, source, statbuf, statlen); 2969 2970 return (0); 2971 } 2972 2973 /* 2974 * Utility function to get the given numeric property. Does no validation that 2975 * the given property is the appropriate type; should only be used with 2976 * hard-coded property types. 2977 */ 2978 uint64_t 2979 zfs_prop_get_int(zfs_handle_t *zhp, zfs_prop_t prop) 2980 { 2981 char *source; 2982 uint64_t val = 0; 2983 2984 (void) get_numeric_property(zhp, prop, NULL, &source, &val); 2985 2986 return (val); 2987 } 2988 2989 static int 2990 zfs_prop_set_int(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t val) 2991 { 2992 char buf[64]; 2993 2994 (void) snprintf(buf, sizeof (buf), "%llu", (longlong_t)val); 2995 return (zfs_prop_set(zhp, zfs_prop_to_name(prop), buf)); 2996 } 2997 2998 /* 2999 * Similar to zfs_prop_get(), but returns the value as an integer. 3000 */ 3001 int 3002 zfs_prop_get_numeric(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t *value, 3003 zprop_source_t *src, char *statbuf, size_t statlen) 3004 { 3005 char *source; 3006 3007 /* 3008 * Check to see if this property applies to our object 3009 */ 3010 if (!zfs_prop_valid_for_type(prop, zhp->zfs_type, B_FALSE)) { 3011 return (zfs_error_fmt(zhp->zfs_hdl, EZFS_PROPTYPE, 3012 dgettext(TEXT_DOMAIN, "cannot get property '%s'"), 3013 zfs_prop_to_name(prop))); 3014 } 3015 3016 if (src) 3017 *src = ZPROP_SRC_NONE; 3018 3019 if (get_numeric_property(zhp, prop, src, &source, value) != 0) 3020 return (-1); 3021 3022 get_source(zhp, src, source, statbuf, statlen); 3023 3024 return (0); 3025 } 3026 3027 #ifdef HAVE_IDMAP 3028 static int 3029 idmap_id_to_numeric_domain_rid(uid_t id, boolean_t isuser, 3030 char **domainp, idmap_rid_t *ridp) 3031 { 3032 idmap_get_handle_t *get_hdl = NULL; 3033 idmap_stat status; 3034 int err = EINVAL; 3035 3036 if (idmap_get_create(&get_hdl) != IDMAP_SUCCESS) 3037 goto out; 3038 3039 if (isuser) { 3040 err = idmap_get_sidbyuid(get_hdl, id, 3041 IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status); 3042 } else { 3043 err = idmap_get_sidbygid(get_hdl, id, 3044 IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status); 3045 } 3046 if (err == IDMAP_SUCCESS && 3047 idmap_get_mappings(get_hdl) == IDMAP_SUCCESS && 3048 status == IDMAP_SUCCESS) 3049 err = 0; 3050 else 3051 err = EINVAL; 3052 out: 3053 if (get_hdl) 3054 idmap_get_destroy(get_hdl); 3055 return (err); 3056 } 3057 #endif /* HAVE_IDMAP */ 3058 3059 /* 3060 * convert the propname into parameters needed by kernel 3061 * Eg: userquota@ahrens -> ZFS_PROP_USERQUOTA, "", 126829 3062 * Eg: userused@matt@domain -> ZFS_PROP_USERUSED, "S-1-123-456", 789 3063 * Eg: groupquota@staff -> ZFS_PROP_GROUPQUOTA, "", 1234 3064 * Eg: groupused@staff -> ZFS_PROP_GROUPUSED, "", 1234 3065 * Eg: projectquota@123 -> ZFS_PROP_PROJECTQUOTA, "", 123 3066 * Eg: projectused@789 -> ZFS_PROP_PROJECTUSED, "", 789 3067 */ 3068 static int 3069 userquota_propname_decode(const char *propname, boolean_t zoned, 3070 zfs_userquota_prop_t *typep, char *domain, int domainlen, uint64_t *ridp) 3071 { 3072 zfs_userquota_prop_t type; 3073 char *cp; 3074 boolean_t isuser; 3075 boolean_t isgroup; 3076 boolean_t isproject; 3077 struct passwd *pw; 3078 struct group *gr; 3079 3080 domain[0] = '\0'; 3081 3082 /* Figure out the property type ({user|group|project}{quota|space}) */ 3083 for (type = 0; type < ZFS_NUM_USERQUOTA_PROPS; type++) { 3084 if (strncmp(propname, zfs_userquota_prop_prefixes[type], 3085 strlen(zfs_userquota_prop_prefixes[type])) == 0) 3086 break; 3087 } 3088 if (type == ZFS_NUM_USERQUOTA_PROPS) 3089 return (EINVAL); 3090 *typep = type; 3091 3092 isuser = (type == ZFS_PROP_USERQUOTA || type == ZFS_PROP_USERUSED || 3093 type == ZFS_PROP_USEROBJQUOTA || 3094 type == ZFS_PROP_USEROBJUSED); 3095 isgroup = (type == ZFS_PROP_GROUPQUOTA || type == ZFS_PROP_GROUPUSED || 3096 type == ZFS_PROP_GROUPOBJQUOTA || 3097 type == ZFS_PROP_GROUPOBJUSED); 3098 isproject = (type == ZFS_PROP_PROJECTQUOTA || 3099 type == ZFS_PROP_PROJECTUSED || type == ZFS_PROP_PROJECTOBJQUOTA || 3100 type == ZFS_PROP_PROJECTOBJUSED); 3101 3102 cp = strchr(propname, '@') + 1; 3103 3104 if (isuser && (pw = getpwnam(cp)) != NULL) { 3105 if (zoned && getzoneid() == GLOBAL_ZONEID) 3106 return (ENOENT); 3107 *ridp = pw->pw_uid; 3108 } else if (isgroup && (gr = getgrnam(cp)) != NULL) { 3109 if (zoned && getzoneid() == GLOBAL_ZONEID) 3110 return (ENOENT); 3111 *ridp = gr->gr_gid; 3112 } else if (!isproject && strchr(cp, '@')) { 3113 #ifdef HAVE_IDMAP 3114 /* 3115 * It's a SID name (eg "user@domain") that needs to be 3116 * turned into S-1-domainID-RID. 3117 */ 3118 directory_error_t e; 3119 char *numericsid = NULL; 3120 char *end; 3121 3122 if (zoned && getzoneid() == GLOBAL_ZONEID) 3123 return (ENOENT); 3124 if (isuser) { 3125 e = directory_sid_from_user_name(NULL, 3126 cp, &numericsid); 3127 } else { 3128 e = directory_sid_from_group_name(NULL, 3129 cp, &numericsid); 3130 } 3131 if (e != NULL) { 3132 directory_error_free(e); 3133 return (ENOENT); 3134 } 3135 if (numericsid == NULL) 3136 return (ENOENT); 3137 cp = numericsid; 3138 (void) strlcpy(domain, cp, domainlen); 3139 cp = strrchr(domain, '-'); 3140 *cp = '\0'; 3141 cp++; 3142 3143 errno = 0; 3144 *ridp = strtoull(cp, &end, 10); 3145 free(numericsid); 3146 3147 if (errno != 0 || *end != '\0') 3148 return (EINVAL); 3149 #else 3150 return (ENOSYS); 3151 #endif /* HAVE_IDMAP */ 3152 } else { 3153 /* It's a user/group/project ID (eg "12345"). */ 3154 uid_t id; 3155 char *end; 3156 id = strtoul(cp, &end, 10); 3157 if (*end != '\0') 3158 return (EINVAL); 3159 if (id > MAXUID && !isproject) { 3160 #ifdef HAVE_IDMAP 3161 /* It's an ephemeral ID. */ 3162 idmap_rid_t rid; 3163 char *mapdomain; 3164 3165 if (idmap_id_to_numeric_domain_rid(id, isuser, 3166 &mapdomain, &rid) != 0) 3167 return (ENOENT); 3168 (void) strlcpy(domain, mapdomain, domainlen); 3169 *ridp = rid; 3170 #else 3171 return (ENOSYS); 3172 #endif /* HAVE_IDMAP */ 3173 } else { 3174 *ridp = id; 3175 } 3176 } 3177 3178 return (0); 3179 } 3180 3181 static int 3182 zfs_prop_get_userquota_common(zfs_handle_t *zhp, const char *propname, 3183 uint64_t *propvalue, zfs_userquota_prop_t *typep) 3184 { 3185 int err; 3186 zfs_cmd_t zc = {"\0"}; 3187 3188 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 3189 3190 err = userquota_propname_decode(propname, 3191 zfs_prop_get_int(zhp, ZFS_PROP_ZONED), 3192 typep, zc.zc_value, sizeof (zc.zc_value), &zc.zc_guid); 3193 zc.zc_objset_type = *typep; 3194 if (err) 3195 return (err); 3196 3197 err = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_USERSPACE_ONE, &zc); 3198 if (err) 3199 return (err); 3200 3201 *propvalue = zc.zc_cookie; 3202 return (0); 3203 } 3204 3205 int 3206 zfs_prop_get_userquota_int(zfs_handle_t *zhp, const char *propname, 3207 uint64_t *propvalue) 3208 { 3209 zfs_userquota_prop_t type; 3210 3211 return (zfs_prop_get_userquota_common(zhp, propname, propvalue, 3212 &type)); 3213 } 3214 3215 int 3216 zfs_prop_get_userquota(zfs_handle_t *zhp, const char *propname, 3217 char *propbuf, int proplen, boolean_t literal) 3218 { 3219 int err; 3220 uint64_t propvalue; 3221 zfs_userquota_prop_t type; 3222 3223 err = zfs_prop_get_userquota_common(zhp, propname, &propvalue, 3224 &type); 3225 3226 if (err) 3227 return (err); 3228 3229 if (literal) { 3230 (void) snprintf(propbuf, proplen, "%llu", 3231 (u_longlong_t)propvalue); 3232 } else if (propvalue == 0 && 3233 (type == ZFS_PROP_USERQUOTA || type == ZFS_PROP_GROUPQUOTA || 3234 type == ZFS_PROP_USEROBJQUOTA || type == ZFS_PROP_GROUPOBJQUOTA || 3235 type == ZFS_PROP_PROJECTQUOTA || 3236 type == ZFS_PROP_PROJECTOBJQUOTA)) { 3237 (void) strlcpy(propbuf, "none", proplen); 3238 } else if (type == ZFS_PROP_USERQUOTA || type == ZFS_PROP_GROUPQUOTA || 3239 type == ZFS_PROP_USERUSED || type == ZFS_PROP_GROUPUSED || 3240 type == ZFS_PROP_PROJECTUSED || type == ZFS_PROP_PROJECTQUOTA) { 3241 zfs_nicebytes(propvalue, propbuf, proplen); 3242 } else { 3243 zfs_nicenum(propvalue, propbuf, proplen); 3244 } 3245 return (0); 3246 } 3247 3248 /* 3249 * propname must start with "written@" or "written#". 3250 */ 3251 int 3252 zfs_prop_get_written_int(zfs_handle_t *zhp, const char *propname, 3253 uint64_t *propvalue) 3254 { 3255 int err; 3256 zfs_cmd_t zc = {"\0"}; 3257 const char *snapname; 3258 3259 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 3260 3261 assert(zfs_prop_written(propname)); 3262 snapname = propname + strlen("written@"); 3263 if (strchr(snapname, '@') != NULL || strchr(snapname, '#') != NULL) { 3264 /* full snapshot or bookmark name specified */ 3265 (void) strlcpy(zc.zc_value, snapname, sizeof (zc.zc_value)); 3266 } else { 3267 /* snapname is the short name, append it to zhp's fsname */ 3268 char *cp; 3269 3270 (void) strlcpy(zc.zc_value, zhp->zfs_name, 3271 sizeof (zc.zc_value)); 3272 cp = strchr(zc.zc_value, '@'); 3273 if (cp != NULL) 3274 *cp = '\0'; 3275 (void) strlcat(zc.zc_value, snapname - 1, sizeof (zc.zc_value)); 3276 } 3277 3278 err = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_SPACE_WRITTEN, &zc); 3279 if (err) 3280 return (err); 3281 3282 *propvalue = zc.zc_cookie; 3283 return (0); 3284 } 3285 3286 int 3287 zfs_prop_get_written(zfs_handle_t *zhp, const char *propname, 3288 char *propbuf, int proplen, boolean_t literal) 3289 { 3290 int err; 3291 uint64_t propvalue; 3292 3293 err = zfs_prop_get_written_int(zhp, propname, &propvalue); 3294 3295 if (err) 3296 return (err); 3297 3298 if (literal) { 3299 (void) snprintf(propbuf, proplen, "%llu", 3300 (u_longlong_t)propvalue); 3301 } else { 3302 zfs_nicebytes(propvalue, propbuf, proplen); 3303 } 3304 3305 return (0); 3306 } 3307 3308 /* 3309 * Returns the name of the given zfs handle. 3310 */ 3311 const char * 3312 zfs_get_name(const zfs_handle_t *zhp) 3313 { 3314 return (zhp->zfs_name); 3315 } 3316 3317 /* 3318 * Returns the name of the parent pool for the given zfs handle. 3319 */ 3320 const char * 3321 zfs_get_pool_name(const zfs_handle_t *zhp) 3322 { 3323 return (zhp->zpool_hdl->zpool_name); 3324 } 3325 3326 /* 3327 * Returns the type of the given zfs handle. 3328 */ 3329 zfs_type_t 3330 zfs_get_type(const zfs_handle_t *zhp) 3331 { 3332 return (zhp->zfs_type); 3333 } 3334 3335 /* 3336 * Is one dataset name a child dataset of another? 3337 * 3338 * Needs to handle these cases: 3339 * Dataset 1 "a/foo" "a/foo" "a/foo" "a/foo" 3340 * Dataset 2 "a/fo" "a/foobar" "a/bar/baz" "a/foo/bar" 3341 * Descendant? No. No. No. Yes. 3342 */ 3343 static boolean_t 3344 is_descendant(const char *ds1, const char *ds2) 3345 { 3346 size_t d1len = strlen(ds1); 3347 3348 /* ds2 can't be a descendant if it's smaller */ 3349 if (strlen(ds2) < d1len) 3350 return (B_FALSE); 3351 3352 /* otherwise, compare strings and verify that there's a '/' char */ 3353 return (ds2[d1len] == '/' && (strncmp(ds1, ds2, d1len) == 0)); 3354 } 3355 3356 /* 3357 * Given a complete name, return just the portion that refers to the parent. 3358 * Will return -1 if there is no parent (path is just the name of the 3359 * pool). 3360 */ 3361 static int 3362 parent_name(const char *path, char *buf, size_t buflen) 3363 { 3364 char *slashp; 3365 3366 (void) strlcpy(buf, path, buflen); 3367 3368 if ((slashp = strrchr(buf, '/')) == NULL) 3369 return (-1); 3370 *slashp = '\0'; 3371 3372 return (0); 3373 } 3374 3375 int 3376 zfs_parent_name(zfs_handle_t *zhp, char *buf, size_t buflen) 3377 { 3378 return (parent_name(zfs_get_name(zhp), buf, buflen)); 3379 } 3380 3381 /* 3382 * If accept_ancestor is false, then check to make sure that the given path has 3383 * a parent, and that it exists. If accept_ancestor is true, then find the 3384 * closest existing ancestor for the given path. In prefixlen return the 3385 * length of already existing prefix of the given path. We also fetch the 3386 * 'zoned' property, which is used to validate property settings when creating 3387 * new datasets. 3388 */ 3389 static int 3390 check_parents(libzfs_handle_t *hdl, const char *path, uint64_t *zoned, 3391 boolean_t accept_ancestor, int *prefixlen) 3392 { 3393 zfs_cmd_t zc = {"\0"}; 3394 char parent[ZFS_MAX_DATASET_NAME_LEN]; 3395 char *slash; 3396 zfs_handle_t *zhp; 3397 char errbuf[1024]; 3398 uint64_t is_zoned; 3399 3400 (void) snprintf(errbuf, sizeof (errbuf), 3401 dgettext(TEXT_DOMAIN, "cannot create '%s'"), path); 3402 3403 /* get parent, and check to see if this is just a pool */ 3404 if (parent_name(path, parent, sizeof (parent)) != 0) { 3405 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3406 "missing dataset name")); 3407 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3408 } 3409 3410 /* check to see if the pool exists */ 3411 if ((slash = strchr(parent, '/')) == NULL) 3412 slash = parent + strlen(parent); 3413 (void) strncpy(zc.zc_name, parent, slash - parent); 3414 zc.zc_name[slash - parent] = '\0'; 3415 if (zfs_ioctl(hdl, ZFS_IOC_OBJSET_STATS, &zc) != 0 && 3416 errno == ENOENT) { 3417 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3418 "no such pool '%s'"), zc.zc_name); 3419 return (zfs_error(hdl, EZFS_NOENT, errbuf)); 3420 } 3421 3422 /* check to see if the parent dataset exists */ 3423 while ((zhp = make_dataset_handle(hdl, parent)) == NULL) { 3424 if (errno == ENOENT && accept_ancestor) { 3425 /* 3426 * Go deeper to find an ancestor, give up on top level. 3427 */ 3428 if (parent_name(parent, parent, sizeof (parent)) != 0) { 3429 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3430 "no such pool '%s'"), zc.zc_name); 3431 return (zfs_error(hdl, EZFS_NOENT, errbuf)); 3432 } 3433 } else if (errno == ENOENT) { 3434 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3435 "parent does not exist")); 3436 return (zfs_error(hdl, EZFS_NOENT, errbuf)); 3437 } else 3438 return (zfs_standard_error(hdl, errno, errbuf)); 3439 } 3440 3441 is_zoned = zfs_prop_get_int(zhp, ZFS_PROP_ZONED); 3442 if (zoned != NULL) 3443 *zoned = is_zoned; 3444 3445 /* we are in a non-global zone, but parent is in the global zone */ 3446 if (getzoneid() != GLOBAL_ZONEID && !is_zoned) { 3447 (void) zfs_standard_error(hdl, EPERM, errbuf); 3448 zfs_close(zhp); 3449 return (-1); 3450 } 3451 3452 /* make sure parent is a filesystem */ 3453 if (zfs_get_type(zhp) != ZFS_TYPE_FILESYSTEM) { 3454 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3455 "parent is not a filesystem")); 3456 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf); 3457 zfs_close(zhp); 3458 return (-1); 3459 } 3460 3461 zfs_close(zhp); 3462 if (prefixlen != NULL) 3463 *prefixlen = strlen(parent); 3464 return (0); 3465 } 3466 3467 /* 3468 * Finds whether the dataset of the given type(s) exists. 3469 */ 3470 boolean_t 3471 zfs_dataset_exists(libzfs_handle_t *hdl, const char *path, zfs_type_t types) 3472 { 3473 zfs_handle_t *zhp; 3474 3475 if (!zfs_validate_name(hdl, path, types, B_FALSE)) 3476 return (B_FALSE); 3477 3478 /* 3479 * Try to get stats for the dataset, which will tell us if it exists. 3480 */ 3481 if ((zhp = make_dataset_handle(hdl, path)) != NULL) { 3482 int ds_type = zhp->zfs_type; 3483 3484 zfs_close(zhp); 3485 if (types & ds_type) 3486 return (B_TRUE); 3487 } 3488 return (B_FALSE); 3489 } 3490 3491 /* 3492 * Given a path to 'target', create all the ancestors between 3493 * the prefixlen portion of the path, and the target itself. 3494 * Fail if the initial prefixlen-ancestor does not already exist. 3495 */ 3496 int 3497 create_parents(libzfs_handle_t *hdl, char *target, int prefixlen) 3498 { 3499 zfs_handle_t *h; 3500 char *cp; 3501 const char *opname; 3502 3503 /* make sure prefix exists */ 3504 cp = target + prefixlen; 3505 if (*cp != '/') { 3506 assert(strchr(cp, '/') == NULL); 3507 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM); 3508 } else { 3509 *cp = '\0'; 3510 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM); 3511 *cp = '/'; 3512 } 3513 if (h == NULL) 3514 return (-1); 3515 zfs_close(h); 3516 3517 /* 3518 * Attempt to create, mount, and share any ancestor filesystems, 3519 * up to the prefixlen-long one. 3520 */ 3521 for (cp = target + prefixlen + 1; 3522 (cp = strchr(cp, '/')) != NULL; *cp = '/', cp++) { 3523 3524 *cp = '\0'; 3525 3526 h = make_dataset_handle(hdl, target); 3527 if (h) { 3528 /* it already exists, nothing to do here */ 3529 zfs_close(h); 3530 continue; 3531 } 3532 3533 if (zfs_create(hdl, target, ZFS_TYPE_FILESYSTEM, 3534 NULL) != 0) { 3535 opname = dgettext(TEXT_DOMAIN, "create"); 3536 goto ancestorerr; 3537 } 3538 3539 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM); 3540 if (h == NULL) { 3541 opname = dgettext(TEXT_DOMAIN, "open"); 3542 goto ancestorerr; 3543 } 3544 3545 if (zfs_mount(h, NULL, 0) != 0) { 3546 opname = dgettext(TEXT_DOMAIN, "mount"); 3547 goto ancestorerr; 3548 } 3549 3550 if (zfs_share(h) != 0) { 3551 opname = dgettext(TEXT_DOMAIN, "share"); 3552 goto ancestorerr; 3553 } 3554 3555 zfs_close(h); 3556 } 3557 zfs_commit_all_shares(); 3558 3559 return (0); 3560 3561 ancestorerr: 3562 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3563 "failed to %s ancestor '%s'"), opname, target); 3564 return (-1); 3565 } 3566 3567 /* 3568 * Creates non-existing ancestors of the given path. 3569 */ 3570 int 3571 zfs_create_ancestors(libzfs_handle_t *hdl, const char *path) 3572 { 3573 int prefix; 3574 char *path_copy; 3575 char errbuf[1024]; 3576 int rc = 0; 3577 3578 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3579 "cannot create '%s'"), path); 3580 3581 /* 3582 * Check that we are not passing the nesting limit 3583 * before we start creating any ancestors. 3584 */ 3585 if (dataset_nestcheck(path) != 0) { 3586 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3587 "maximum name nesting depth exceeded")); 3588 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3589 } 3590 3591 if (check_parents(hdl, path, NULL, B_TRUE, &prefix) != 0) 3592 return (-1); 3593 3594 if ((path_copy = strdup(path)) != NULL) { 3595 rc = create_parents(hdl, path_copy, prefix); 3596 free(path_copy); 3597 } 3598 if (path_copy == NULL || rc != 0) 3599 return (-1); 3600 3601 return (0); 3602 } 3603 3604 /* 3605 * Create a new filesystem or volume. 3606 */ 3607 int 3608 zfs_create(libzfs_handle_t *hdl, const char *path, zfs_type_t type, 3609 nvlist_t *props) 3610 { 3611 int ret; 3612 uint64_t size = 0; 3613 uint64_t blocksize = zfs_prop_default_numeric(ZFS_PROP_VOLBLOCKSIZE); 3614 uint64_t zoned; 3615 enum lzc_dataset_type ost; 3616 zpool_handle_t *zpool_handle; 3617 uint8_t *wkeydata = NULL; 3618 uint_t wkeylen = 0; 3619 char errbuf[1024]; 3620 char parent[ZFS_MAX_DATASET_NAME_LEN]; 3621 3622 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3623 "cannot create '%s'"), path); 3624 3625 /* validate the path, taking care to note the extended error message */ 3626 if (!zfs_validate_name(hdl, path, type, B_TRUE)) 3627 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3628 3629 if (dataset_nestcheck(path) != 0) { 3630 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3631 "maximum name nesting depth exceeded")); 3632 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3633 } 3634 3635 /* validate parents exist */ 3636 if (check_parents(hdl, path, &zoned, B_FALSE, NULL) != 0) 3637 return (-1); 3638 3639 /* 3640 * The failure modes when creating a dataset of a different type over 3641 * one that already exists is a little strange. In particular, if you 3642 * try to create a dataset on top of an existing dataset, the ioctl() 3643 * will return ENOENT, not EEXIST. To prevent this from happening, we 3644 * first try to see if the dataset exists. 3645 */ 3646 if (zfs_dataset_exists(hdl, path, ZFS_TYPE_DATASET)) { 3647 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3648 "dataset already exists")); 3649 return (zfs_error(hdl, EZFS_EXISTS, errbuf)); 3650 } 3651 3652 if (type == ZFS_TYPE_VOLUME) 3653 ost = LZC_DATSET_TYPE_ZVOL; 3654 else 3655 ost = LZC_DATSET_TYPE_ZFS; 3656 3657 /* open zpool handle for prop validation */ 3658 char pool_path[ZFS_MAX_DATASET_NAME_LEN]; 3659 (void) strlcpy(pool_path, path, sizeof (pool_path)); 3660 3661 /* truncate pool_path at first slash */ 3662 char *p = strchr(pool_path, '/'); 3663 if (p != NULL) 3664 *p = '\0'; 3665 3666 if ((zpool_handle = zpool_open(hdl, pool_path)) == NULL) 3667 return (-1); 3668 3669 if (props && (props = zfs_valid_proplist(hdl, type, props, 3670 zoned, NULL, zpool_handle, B_TRUE, errbuf)) == 0) { 3671 zpool_close(zpool_handle); 3672 return (-1); 3673 } 3674 zpool_close(zpool_handle); 3675 3676 if (type == ZFS_TYPE_VOLUME) { 3677 /* 3678 * If we are creating a volume, the size and block size must 3679 * satisfy a few restraints. First, the blocksize must be a 3680 * valid block size between SPA_{MIN,MAX}BLOCKSIZE. Second, the 3681 * volsize must be a multiple of the block size, and cannot be 3682 * zero. 3683 */ 3684 if (props == NULL || nvlist_lookup_uint64(props, 3685 zfs_prop_to_name(ZFS_PROP_VOLSIZE), &size) != 0) { 3686 nvlist_free(props); 3687 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3688 "missing volume size")); 3689 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 3690 } 3691 3692 if ((ret = nvlist_lookup_uint64(props, 3693 zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE), 3694 &blocksize)) != 0) { 3695 if (ret == ENOENT) { 3696 blocksize = zfs_prop_default_numeric( 3697 ZFS_PROP_VOLBLOCKSIZE); 3698 } else { 3699 nvlist_free(props); 3700 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3701 "missing volume block size")); 3702 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 3703 } 3704 } 3705 3706 if (size == 0) { 3707 nvlist_free(props); 3708 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3709 "volume size cannot be zero")); 3710 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 3711 } 3712 3713 if (size % blocksize != 0) { 3714 nvlist_free(props); 3715 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3716 "volume size must be a multiple of volume block " 3717 "size")); 3718 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 3719 } 3720 } 3721 3722 (void) parent_name(path, parent, sizeof (parent)); 3723 if (zfs_crypto_create(hdl, parent, props, NULL, B_TRUE, 3724 &wkeydata, &wkeylen) != 0) { 3725 nvlist_free(props); 3726 return (zfs_error(hdl, EZFS_CRYPTOFAILED, errbuf)); 3727 } 3728 3729 /* create the dataset */ 3730 ret = lzc_create(path, ost, props, wkeydata, wkeylen); 3731 nvlist_free(props); 3732 if (wkeydata != NULL) 3733 free(wkeydata); 3734 3735 /* check for failure */ 3736 if (ret != 0) { 3737 switch (errno) { 3738 case ENOENT: 3739 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3740 "no such parent '%s'"), parent); 3741 return (zfs_error(hdl, EZFS_NOENT, errbuf)); 3742 3743 case ENOTSUP: 3744 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3745 "pool must be upgraded to set this " 3746 "property or value")); 3747 return (zfs_error(hdl, EZFS_BADVERSION, errbuf)); 3748 3749 case EACCES: 3750 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3751 "encryption root's key is not loaded " 3752 "or provided")); 3753 return (zfs_error(hdl, EZFS_CRYPTOFAILED, errbuf)); 3754 3755 case ERANGE: 3756 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3757 "invalid property value(s) specified")); 3758 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 3759 #ifdef _ILP32 3760 case EOVERFLOW: 3761 /* 3762 * This platform can't address a volume this big. 3763 */ 3764 if (type == ZFS_TYPE_VOLUME) 3765 return (zfs_error(hdl, EZFS_VOLTOOBIG, 3766 errbuf)); 3767 #endif 3768 /* FALLTHROUGH */ 3769 default: 3770 return (zfs_standard_error(hdl, errno, errbuf)); 3771 } 3772 } 3773 3774 return (0); 3775 } 3776 3777 /* 3778 * Destroys the given dataset. The caller must make sure that the filesystem 3779 * isn't mounted, and that there are no active dependents. If the file system 3780 * does not exist this function does nothing. 3781 */ 3782 int 3783 zfs_destroy(zfs_handle_t *zhp, boolean_t defer) 3784 { 3785 int error; 3786 3787 if (zhp->zfs_type != ZFS_TYPE_SNAPSHOT && defer) 3788 return (EINVAL); 3789 3790 if (zhp->zfs_type == ZFS_TYPE_BOOKMARK) { 3791 nvlist_t *nv = fnvlist_alloc(); 3792 fnvlist_add_boolean(nv, zhp->zfs_name); 3793 error = lzc_destroy_bookmarks(nv, NULL); 3794 fnvlist_free(nv); 3795 if (error != 0) { 3796 return (zfs_standard_error_fmt(zhp->zfs_hdl, error, 3797 dgettext(TEXT_DOMAIN, "cannot destroy '%s'"), 3798 zhp->zfs_name)); 3799 } 3800 return (0); 3801 } 3802 3803 if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) { 3804 nvlist_t *nv = fnvlist_alloc(); 3805 fnvlist_add_boolean(nv, zhp->zfs_name); 3806 error = lzc_destroy_snaps(nv, defer, NULL); 3807 fnvlist_free(nv); 3808 } else { 3809 error = lzc_destroy(zhp->zfs_name); 3810 } 3811 3812 if (error != 0 && error != ENOENT) { 3813 return (zfs_standard_error_fmt(zhp->zfs_hdl, errno, 3814 dgettext(TEXT_DOMAIN, "cannot destroy '%s'"), 3815 zhp->zfs_name)); 3816 } 3817 3818 remove_mountpoint(zhp); 3819 3820 return (0); 3821 } 3822 3823 struct destroydata { 3824 nvlist_t *nvl; 3825 const char *snapname; 3826 }; 3827 3828 static int 3829 zfs_check_snap_cb(zfs_handle_t *zhp, void *arg) 3830 { 3831 struct destroydata *dd = arg; 3832 char name[ZFS_MAX_DATASET_NAME_LEN]; 3833 int rv = 0; 3834 3835 if (snprintf(name, sizeof (name), "%s@%s", zhp->zfs_name, 3836 dd->snapname) >= sizeof (name)) 3837 return (EINVAL); 3838 3839 if (lzc_exists(name)) 3840 verify(nvlist_add_boolean(dd->nvl, name) == 0); 3841 3842 rv = zfs_iter_filesystems(zhp, zfs_check_snap_cb, dd); 3843 zfs_close(zhp); 3844 return (rv); 3845 } 3846 3847 /* 3848 * Destroys all snapshots with the given name in zhp & descendants. 3849 */ 3850 int 3851 zfs_destroy_snaps(zfs_handle_t *zhp, char *snapname, boolean_t defer) 3852 { 3853 int ret; 3854 struct destroydata dd = { 0 }; 3855 3856 dd.snapname = snapname; 3857 verify(nvlist_alloc(&dd.nvl, NV_UNIQUE_NAME, 0) == 0); 3858 (void) zfs_check_snap_cb(zfs_handle_dup(zhp), &dd); 3859 3860 if (nvlist_empty(dd.nvl)) { 3861 ret = zfs_standard_error_fmt(zhp->zfs_hdl, ENOENT, 3862 dgettext(TEXT_DOMAIN, "cannot destroy '%s@%s'"), 3863 zhp->zfs_name, snapname); 3864 } else { 3865 ret = zfs_destroy_snaps_nvl(zhp->zfs_hdl, dd.nvl, defer); 3866 } 3867 nvlist_free(dd.nvl); 3868 return (ret); 3869 } 3870 3871 /* 3872 * Destroys all the snapshots named in the nvlist. 3873 */ 3874 int 3875 zfs_destroy_snaps_nvl(libzfs_handle_t *hdl, nvlist_t *snaps, boolean_t defer) 3876 { 3877 int ret; 3878 nvlist_t *errlist = NULL; 3879 nvpair_t *pair; 3880 3881 ret = lzc_destroy_snaps(snaps, defer, &errlist); 3882 3883 if (ret == 0) { 3884 nvlist_free(errlist); 3885 return (0); 3886 } 3887 3888 if (nvlist_empty(errlist)) { 3889 char errbuf[1024]; 3890 (void) snprintf(errbuf, sizeof (errbuf), 3891 dgettext(TEXT_DOMAIN, "cannot destroy snapshots")); 3892 3893 ret = zfs_standard_error(hdl, ret, errbuf); 3894 } 3895 for (pair = nvlist_next_nvpair(errlist, NULL); 3896 pair != NULL; pair = nvlist_next_nvpair(errlist, pair)) { 3897 char errbuf[1024]; 3898 (void) snprintf(errbuf, sizeof (errbuf), 3899 dgettext(TEXT_DOMAIN, "cannot destroy snapshot %s"), 3900 nvpair_name(pair)); 3901 3902 switch (fnvpair_value_int32(pair)) { 3903 case EEXIST: 3904 zfs_error_aux(hdl, 3905 dgettext(TEXT_DOMAIN, "snapshot is cloned")); 3906 ret = zfs_error(hdl, EZFS_EXISTS, errbuf); 3907 break; 3908 default: 3909 ret = zfs_standard_error(hdl, errno, errbuf); 3910 break; 3911 } 3912 } 3913 3914 nvlist_free(errlist); 3915 return (ret); 3916 } 3917 3918 /* 3919 * Clones the given dataset. The target must be of the same type as the source. 3920 */ 3921 int 3922 zfs_clone(zfs_handle_t *zhp, const char *target, nvlist_t *props) 3923 { 3924 char parent[ZFS_MAX_DATASET_NAME_LEN]; 3925 int ret; 3926 char errbuf[1024]; 3927 libzfs_handle_t *hdl = zhp->zfs_hdl; 3928 uint64_t zoned; 3929 3930 assert(zhp->zfs_type == ZFS_TYPE_SNAPSHOT); 3931 3932 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3933 "cannot create '%s'"), target); 3934 3935 /* validate the target/clone name */ 3936 if (!zfs_validate_name(hdl, target, ZFS_TYPE_FILESYSTEM, B_TRUE)) 3937 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3938 3939 /* validate parents exist */ 3940 if (check_parents(hdl, target, &zoned, B_FALSE, NULL) != 0) 3941 return (-1); 3942 3943 (void) parent_name(target, parent, sizeof (parent)); 3944 3945 /* do the clone */ 3946 3947 if (props) { 3948 zfs_type_t type; 3949 3950 if (ZFS_IS_VOLUME(zhp)) { 3951 type = ZFS_TYPE_VOLUME; 3952 } else { 3953 type = ZFS_TYPE_FILESYSTEM; 3954 } 3955 if ((props = zfs_valid_proplist(hdl, type, props, zoned, 3956 zhp, zhp->zpool_hdl, B_TRUE, errbuf)) == NULL) 3957 return (-1); 3958 if (zfs_fix_auto_resv(zhp, props) == -1) { 3959 nvlist_free(props); 3960 return (-1); 3961 } 3962 } 3963 3964 if (zfs_crypto_clone_check(hdl, zhp, parent, props) != 0) { 3965 nvlist_free(props); 3966 return (zfs_error(hdl, EZFS_CRYPTOFAILED, errbuf)); 3967 } 3968 3969 ret = lzc_clone(target, zhp->zfs_name, props); 3970 nvlist_free(props); 3971 3972 if (ret != 0) { 3973 switch (errno) { 3974 3975 case ENOENT: 3976 /* 3977 * The parent doesn't exist. We should have caught this 3978 * above, but there may a race condition that has since 3979 * destroyed the parent. 3980 * 3981 * At this point, we don't know whether it's the source 3982 * that doesn't exist anymore, or whether the target 3983 * dataset doesn't exist. 3984 */ 3985 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN, 3986 "no such parent '%s'"), parent); 3987 return (zfs_error(zhp->zfs_hdl, EZFS_NOENT, errbuf)); 3988 3989 case EXDEV: 3990 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN, 3991 "source and target pools differ")); 3992 return (zfs_error(zhp->zfs_hdl, EZFS_CROSSTARGET, 3993 errbuf)); 3994 3995 default: 3996 return (zfs_standard_error(zhp->zfs_hdl, errno, 3997 errbuf)); 3998 } 3999 } 4000 4001 return (ret); 4002 } 4003 4004 /* 4005 * Promotes the given clone fs to be the clone parent. 4006 */ 4007 int 4008 zfs_promote(zfs_handle_t *zhp) 4009 { 4010 libzfs_handle_t *hdl = zhp->zfs_hdl; 4011 char snapname[ZFS_MAX_DATASET_NAME_LEN]; 4012 int ret; 4013 char errbuf[1024]; 4014 4015 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 4016 "cannot promote '%s'"), zhp->zfs_name); 4017 4018 if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) { 4019 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4020 "snapshots can not be promoted")); 4021 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 4022 } 4023 4024 if (zhp->zfs_dmustats.dds_origin[0] == '\0') { 4025 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4026 "not a cloned filesystem")); 4027 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 4028 } 4029 4030 if (!zfs_validate_name(hdl, zhp->zfs_name, zhp->zfs_type, B_TRUE)) 4031 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 4032 4033 ret = lzc_promote(zhp->zfs_name, snapname, sizeof (snapname)); 4034 4035 if (ret != 0) { 4036 switch (ret) { 4037 case EACCES: 4038 /* 4039 * Promoting encrypted dataset outside its 4040 * encryption root. 4041 */ 4042 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4043 "cannot promote dataset outside its " 4044 "encryption root")); 4045 return (zfs_error(hdl, EZFS_EXISTS, errbuf)); 4046 4047 case EEXIST: 4048 /* There is a conflicting snapshot name. */ 4049 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4050 "conflicting snapshot '%s' from parent '%s'"), 4051 snapname, zhp->zfs_dmustats.dds_origin); 4052 return (zfs_error(hdl, EZFS_EXISTS, errbuf)); 4053 4054 default: 4055 return (zfs_standard_error(hdl, ret, errbuf)); 4056 } 4057 } 4058 return (ret); 4059 } 4060 4061 typedef struct snapdata { 4062 nvlist_t *sd_nvl; 4063 const char *sd_snapname; 4064 } snapdata_t; 4065 4066 static int 4067 zfs_snapshot_cb(zfs_handle_t *zhp, void *arg) 4068 { 4069 snapdata_t *sd = arg; 4070 char name[ZFS_MAX_DATASET_NAME_LEN]; 4071 int rv = 0; 4072 4073 if (zfs_prop_get_int(zhp, ZFS_PROP_INCONSISTENT) == 0) { 4074 if (snprintf(name, sizeof (name), "%s@%s", zfs_get_name(zhp), 4075 sd->sd_snapname) >= sizeof (name)) 4076 return (EINVAL); 4077 4078 fnvlist_add_boolean(sd->sd_nvl, name); 4079 4080 rv = zfs_iter_filesystems(zhp, zfs_snapshot_cb, sd); 4081 } 4082 zfs_close(zhp); 4083 4084 return (rv); 4085 } 4086 4087 /* 4088 * Creates snapshots. The keys in the snaps nvlist are the snapshots to be 4089 * created. 4090 */ 4091 int 4092 zfs_snapshot_nvl(libzfs_handle_t *hdl, nvlist_t *snaps, nvlist_t *props) 4093 { 4094 int ret; 4095 char errbuf[1024]; 4096 nvpair_t *elem; 4097 nvlist_t *errors; 4098 zpool_handle_t *zpool_hdl; 4099 char pool[ZFS_MAX_DATASET_NAME_LEN]; 4100 4101 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 4102 "cannot create snapshots ")); 4103 4104 elem = NULL; 4105 while ((elem = nvlist_next_nvpair(snaps, elem)) != NULL) { 4106 const char *snapname = nvpair_name(elem); 4107 4108 /* validate the target name */ 4109 if (!zfs_validate_name(hdl, snapname, ZFS_TYPE_SNAPSHOT, 4110 B_TRUE)) { 4111 (void) snprintf(errbuf, sizeof (errbuf), 4112 dgettext(TEXT_DOMAIN, 4113 "cannot create snapshot '%s'"), snapname); 4114 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 4115 } 4116 } 4117 4118 /* 4119 * get pool handle for prop validation. assumes all snaps are in the 4120 * same pool, as does lzc_snapshot (below). 4121 */ 4122 elem = nvlist_next_nvpair(snaps, NULL); 4123 (void) strlcpy(pool, nvpair_name(elem), sizeof (pool)); 4124 pool[strcspn(pool, "/@")] = '\0'; 4125 zpool_hdl = zpool_open(hdl, pool); 4126 if (zpool_hdl == NULL) 4127 return (-1); 4128 4129 if (props != NULL && 4130 (props = zfs_valid_proplist(hdl, ZFS_TYPE_SNAPSHOT, 4131 props, B_FALSE, NULL, zpool_hdl, B_FALSE, errbuf)) == NULL) { 4132 zpool_close(zpool_hdl); 4133 return (-1); 4134 } 4135 zpool_close(zpool_hdl); 4136 4137 ret = lzc_snapshot(snaps, props, &errors); 4138 4139 if (ret != 0) { 4140 boolean_t printed = B_FALSE; 4141 for (elem = nvlist_next_nvpair(errors, NULL); 4142 elem != NULL; 4143 elem = nvlist_next_nvpair(errors, elem)) { 4144 (void) snprintf(errbuf, sizeof (errbuf), 4145 dgettext(TEXT_DOMAIN, 4146 "cannot create snapshot '%s'"), nvpair_name(elem)); 4147 (void) zfs_standard_error(hdl, 4148 fnvpair_value_int32(elem), errbuf); 4149 printed = B_TRUE; 4150 } 4151 if (!printed) { 4152 switch (ret) { 4153 case EXDEV: 4154 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4155 "multiple snapshots of same " 4156 "fs not allowed")); 4157 (void) zfs_error(hdl, EZFS_EXISTS, errbuf); 4158 4159 break; 4160 default: 4161 (void) zfs_standard_error(hdl, ret, errbuf); 4162 } 4163 } 4164 } 4165 4166 nvlist_free(props); 4167 nvlist_free(errors); 4168 return (ret); 4169 } 4170 4171 int 4172 zfs_snapshot(libzfs_handle_t *hdl, const char *path, boolean_t recursive, 4173 nvlist_t *props) 4174 { 4175 int ret; 4176 snapdata_t sd = { 0 }; 4177 char fsname[ZFS_MAX_DATASET_NAME_LEN]; 4178 char *cp; 4179 zfs_handle_t *zhp; 4180 char errbuf[1024]; 4181 4182 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 4183 "cannot snapshot %s"), path); 4184 4185 if (!zfs_validate_name(hdl, path, ZFS_TYPE_SNAPSHOT, B_TRUE)) 4186 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 4187 4188 (void) strlcpy(fsname, path, sizeof (fsname)); 4189 cp = strchr(fsname, '@'); 4190 *cp = '\0'; 4191 sd.sd_snapname = cp + 1; 4192 4193 if ((zhp = zfs_open(hdl, fsname, ZFS_TYPE_FILESYSTEM | 4194 ZFS_TYPE_VOLUME)) == NULL) { 4195 return (-1); 4196 } 4197 4198 verify(nvlist_alloc(&sd.sd_nvl, NV_UNIQUE_NAME, 0) == 0); 4199 if (recursive) { 4200 (void) zfs_snapshot_cb(zfs_handle_dup(zhp), &sd); 4201 } else { 4202 fnvlist_add_boolean(sd.sd_nvl, path); 4203 } 4204 4205 ret = zfs_snapshot_nvl(hdl, sd.sd_nvl, props); 4206 nvlist_free(sd.sd_nvl); 4207 zfs_close(zhp); 4208 return (ret); 4209 } 4210 4211 /* 4212 * Destroy any more recent snapshots. We invoke this callback on any dependents 4213 * of the snapshot first. If the 'cb_dependent' member is non-zero, then this 4214 * is a dependent and we should just destroy it without checking the transaction 4215 * group. 4216 */ 4217 typedef struct rollback_data { 4218 const char *cb_target; /* the snapshot */ 4219 uint64_t cb_create; /* creation time reference */ 4220 boolean_t cb_error; 4221 boolean_t cb_force; 4222 } rollback_data_t; 4223 4224 static int 4225 rollback_destroy_dependent(zfs_handle_t *zhp, void *data) 4226 { 4227 rollback_data_t *cbp = data; 4228 prop_changelist_t *clp; 4229 4230 /* We must destroy this clone; first unmount it */ 4231 clp = changelist_gather(zhp, ZFS_PROP_NAME, 0, 4232 cbp->cb_force ? MS_FORCE: 0); 4233 if (clp == NULL || changelist_prefix(clp) != 0) { 4234 cbp->cb_error = B_TRUE; 4235 zfs_close(zhp); 4236 return (0); 4237 } 4238 if (zfs_destroy(zhp, B_FALSE) != 0) 4239 cbp->cb_error = B_TRUE; 4240 else 4241 changelist_remove(clp, zhp->zfs_name); 4242 (void) changelist_postfix(clp); 4243 changelist_free(clp); 4244 4245 zfs_close(zhp); 4246 return (0); 4247 } 4248 4249 static int 4250 rollback_destroy(zfs_handle_t *zhp, void *data) 4251 { 4252 rollback_data_t *cbp = data; 4253 4254 if (zfs_prop_get_int(zhp, ZFS_PROP_CREATETXG) > cbp->cb_create) { 4255 cbp->cb_error |= zfs_iter_dependents(zhp, B_FALSE, 4256 rollback_destroy_dependent, cbp); 4257 4258 cbp->cb_error |= zfs_destroy(zhp, B_FALSE); 4259 } 4260 4261 zfs_close(zhp); 4262 return (0); 4263 } 4264 4265 /* 4266 * Given a dataset, rollback to a specific snapshot, discarding any 4267 * data changes since then and making it the active dataset. 4268 * 4269 * Any snapshots and bookmarks more recent than the target are 4270 * destroyed, along with their dependents (i.e. clones). 4271 */ 4272 int 4273 zfs_rollback(zfs_handle_t *zhp, zfs_handle_t *snap, boolean_t force) 4274 { 4275 rollback_data_t cb = { 0 }; 4276 int err; 4277 boolean_t restore_resv = 0; 4278 uint64_t old_volsize = 0, new_volsize; 4279 zfs_prop_t resv_prop = { 0 }; 4280 uint64_t min_txg = 0; 4281 4282 assert(zhp->zfs_type == ZFS_TYPE_FILESYSTEM || 4283 zhp->zfs_type == ZFS_TYPE_VOLUME); 4284 4285 /* 4286 * Destroy all recent snapshots and their dependents. 4287 */ 4288 cb.cb_force = force; 4289 cb.cb_target = snap->zfs_name; 4290 cb.cb_create = zfs_prop_get_int(snap, ZFS_PROP_CREATETXG); 4291 4292 if (cb.cb_create > 0) 4293 min_txg = cb.cb_create; 4294 4295 (void) zfs_iter_snapshots(zhp, B_FALSE, rollback_destroy, &cb, 4296 min_txg, 0); 4297 4298 (void) zfs_iter_bookmarks(zhp, rollback_destroy, &cb); 4299 4300 if (cb.cb_error) 4301 return (-1); 4302 4303 /* 4304 * Now that we have verified that the snapshot is the latest, 4305 * rollback to the given snapshot. 4306 */ 4307 4308 if (zhp->zfs_type == ZFS_TYPE_VOLUME) { 4309 if (zfs_which_resv_prop(zhp, &resv_prop) < 0) 4310 return (-1); 4311 old_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE); 4312 restore_resv = 4313 (old_volsize == zfs_prop_get_int(zhp, resv_prop)); 4314 } 4315 4316 /* 4317 * Pass both the filesystem and the wanted snapshot names, 4318 * we would get an error back if the snapshot is destroyed or 4319 * a new snapshot is created before this request is processed. 4320 */ 4321 err = lzc_rollback_to(zhp->zfs_name, snap->zfs_name); 4322 if (err != 0) { 4323 char errbuf[1024]; 4324 4325 (void) snprintf(errbuf, sizeof (errbuf), 4326 dgettext(TEXT_DOMAIN, "cannot rollback '%s'"), 4327 zhp->zfs_name); 4328 switch (err) { 4329 case EEXIST: 4330 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN, 4331 "there is a snapshot or bookmark more recent " 4332 "than '%s'"), snap->zfs_name); 4333 (void) zfs_error(zhp->zfs_hdl, EZFS_EXISTS, errbuf); 4334 break; 4335 case ESRCH: 4336 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN, 4337 "'%s' is not found among snapshots of '%s'"), 4338 snap->zfs_name, zhp->zfs_name); 4339 (void) zfs_error(zhp->zfs_hdl, EZFS_NOENT, errbuf); 4340 break; 4341 case EINVAL: 4342 (void) zfs_error(zhp->zfs_hdl, EZFS_BADTYPE, errbuf); 4343 break; 4344 default: 4345 (void) zfs_standard_error(zhp->zfs_hdl, err, errbuf); 4346 } 4347 return (err); 4348 } 4349 4350 /* 4351 * For volumes, if the pre-rollback volsize matched the pre- 4352 * rollback reservation and the volsize has changed then set 4353 * the reservation property to the post-rollback volsize. 4354 * Make a new handle since the rollback closed the dataset. 4355 */ 4356 if ((zhp->zfs_type == ZFS_TYPE_VOLUME) && 4357 (zhp = make_dataset_handle(zhp->zfs_hdl, zhp->zfs_name))) { 4358 if (restore_resv) { 4359 new_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE); 4360 if (old_volsize != new_volsize) 4361 err = zfs_prop_set_int(zhp, resv_prop, 4362 new_volsize); 4363 } 4364 zfs_close(zhp); 4365 } 4366 return (err); 4367 } 4368 4369 /* 4370 * Renames the given dataset. 4371 */ 4372 int 4373 zfs_rename(zfs_handle_t *zhp, const char *target, boolean_t recursive, 4374 boolean_t force_unmount) 4375 { 4376 int ret = 0; 4377 zfs_cmd_t zc = {"\0"}; 4378 char *delim; 4379 prop_changelist_t *cl = NULL; 4380 char parent[ZFS_MAX_DATASET_NAME_LEN]; 4381 libzfs_handle_t *hdl = zhp->zfs_hdl; 4382 char errbuf[1024]; 4383 4384 /* if we have the same exact name, just return success */ 4385 if (strcmp(zhp->zfs_name, target) == 0) 4386 return (0); 4387 4388 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 4389 "cannot rename to '%s'"), target); 4390 4391 /* make sure source name is valid */ 4392 if (!zfs_validate_name(hdl, zhp->zfs_name, zhp->zfs_type, B_TRUE)) 4393 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 4394 4395 /* 4396 * Make sure the target name is valid 4397 */ 4398 if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) { 4399 if ((strchr(target, '@') == NULL) || 4400 *target == '@') { 4401 /* 4402 * Snapshot target name is abbreviated, 4403 * reconstruct full dataset name 4404 */ 4405 (void) strlcpy(parent, zhp->zfs_name, 4406 sizeof (parent)); 4407 delim = strchr(parent, '@'); 4408 if (strchr(target, '@') == NULL) 4409 *(++delim) = '\0'; 4410 else 4411 *delim = '\0'; 4412 (void) strlcat(parent, target, sizeof (parent)); 4413 target = parent; 4414 } else { 4415 /* 4416 * Make sure we're renaming within the same dataset. 4417 */ 4418 delim = strchr(target, '@'); 4419 if (strncmp(zhp->zfs_name, target, delim - target) 4420 != 0 || zhp->zfs_name[delim - target] != '@') { 4421 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4422 "snapshots must be part of same " 4423 "dataset")); 4424 return (zfs_error(hdl, EZFS_CROSSTARGET, 4425 errbuf)); 4426 } 4427 } 4428 4429 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE)) 4430 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 4431 } else { 4432 if (recursive) { 4433 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4434 "recursive rename must be a snapshot")); 4435 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 4436 } 4437 4438 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE)) 4439 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 4440 4441 /* validate parents */ 4442 if (check_parents(hdl, target, NULL, B_FALSE, NULL) != 0) 4443 return (-1); 4444 4445 /* make sure we're in the same pool */ 4446 verify((delim = strchr(target, '/')) != NULL); 4447 if (strncmp(zhp->zfs_name, target, delim - target) != 0 || 4448 zhp->zfs_name[delim - target] != '/') { 4449 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4450 "datasets must be within same pool")); 4451 return (zfs_error(hdl, EZFS_CROSSTARGET, errbuf)); 4452 } 4453 4454 /* new name cannot be a child of the current dataset name */ 4455 if (is_descendant(zhp->zfs_name, target)) { 4456 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4457 "New dataset name cannot be a descendant of " 4458 "current dataset name")); 4459 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 4460 } 4461 } 4462 4463 (void) snprintf(errbuf, sizeof (errbuf), 4464 dgettext(TEXT_DOMAIN, "cannot rename '%s'"), zhp->zfs_name); 4465 4466 if (getzoneid() == GLOBAL_ZONEID && 4467 zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) { 4468 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4469 "dataset is used in a non-global zone")); 4470 return (zfs_error(hdl, EZFS_ZONED, errbuf)); 4471 } 4472 4473 if (recursive) { 4474 zfs_handle_t *zhrp; 4475 char *parentname = zfs_strdup(zhp->zfs_hdl, zhp->zfs_name); 4476 if (parentname == NULL) { 4477 ret = -1; 4478 goto error; 4479 } 4480 delim = strchr(parentname, '@'); 4481 *delim = '\0'; 4482 zhrp = zfs_open(zhp->zfs_hdl, parentname, ZFS_TYPE_DATASET); 4483 free(parentname); 4484 if (zhrp == NULL) { 4485 ret = -1; 4486 goto error; 4487 } 4488 zfs_close(zhrp); 4489 } else if (zhp->zfs_type != ZFS_TYPE_SNAPSHOT) { 4490 if ((cl = changelist_gather(zhp, ZFS_PROP_NAME, 4491 CL_GATHER_ITER_MOUNTED, 4492 force_unmount ? MS_FORCE : 0)) == NULL) 4493 return (-1); 4494 4495 if (changelist_haszonedchild(cl)) { 4496 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4497 "child dataset with inherited mountpoint is used " 4498 "in a non-global zone")); 4499 (void) zfs_error(hdl, EZFS_ZONED, errbuf); 4500 ret = -1; 4501 goto error; 4502 } 4503 4504 if ((ret = changelist_prefix(cl)) != 0) 4505 goto error; 4506 } 4507 4508 if (ZFS_IS_VOLUME(zhp)) 4509 zc.zc_objset_type = DMU_OST_ZVOL; 4510 else 4511 zc.zc_objset_type = DMU_OST_ZFS; 4512 4513 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 4514 (void) strlcpy(zc.zc_value, target, sizeof (zc.zc_value)); 4515 4516 zc.zc_cookie = recursive; 4517 4518 if ((ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_RENAME, &zc)) != 0) { 4519 /* 4520 * if it was recursive, the one that actually failed will 4521 * be in zc.zc_name 4522 */ 4523 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 4524 "cannot rename '%s'"), zc.zc_name); 4525 4526 if (recursive && errno == EEXIST) { 4527 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4528 "a child dataset already has a snapshot " 4529 "with the new name")); 4530 (void) zfs_error(hdl, EZFS_EXISTS, errbuf); 4531 } else if (errno == EACCES) { 4532 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4533 "cannot move encrypted child outside of " 4534 "its encryption root")); 4535 (void) zfs_error(hdl, EZFS_CRYPTOFAILED, errbuf); 4536 } else { 4537 (void) zfs_standard_error(zhp->zfs_hdl, errno, errbuf); 4538 } 4539 4540 /* 4541 * On failure, we still want to remount any filesystems that 4542 * were previously mounted, so we don't alter the system state. 4543 */ 4544 if (cl != NULL) 4545 (void) changelist_postfix(cl); 4546 } else { 4547 if (cl != NULL) { 4548 changelist_rename(cl, zfs_get_name(zhp), target); 4549 ret = changelist_postfix(cl); 4550 } 4551 } 4552 4553 error: 4554 if (cl != NULL) { 4555 changelist_free(cl); 4556 } 4557 return (ret); 4558 } 4559 4560 nvlist_t * 4561 zfs_get_all_props(zfs_handle_t *zhp) 4562 { 4563 return (zhp->zfs_props); 4564 } 4565 4566 nvlist_t * 4567 zfs_get_recvd_props(zfs_handle_t *zhp) 4568 { 4569 if (zhp->zfs_recvd_props == NULL) 4570 if (get_recvd_props_ioctl(zhp) != 0) 4571 return (NULL); 4572 return (zhp->zfs_recvd_props); 4573 } 4574 4575 nvlist_t * 4576 zfs_get_user_props(zfs_handle_t *zhp) 4577 { 4578 return (zhp->zfs_user_props); 4579 } 4580 4581 /* 4582 * This function is used by 'zfs list' to determine the exact set of columns to 4583 * display, and their maximum widths. This does two main things: 4584 * 4585 * - If this is a list of all properties, then expand the list to include 4586 * all native properties, and set a flag so that for each dataset we look 4587 * for new unique user properties and add them to the list. 4588 * 4589 * - For non fixed-width properties, keep track of the maximum width seen 4590 * so that we can size the column appropriately. If the user has 4591 * requested received property values, we also need to compute the width 4592 * of the RECEIVED column. 4593 */ 4594 int 4595 zfs_expand_proplist(zfs_handle_t *zhp, zprop_list_t **plp, boolean_t received, 4596 boolean_t literal) 4597 { 4598 libzfs_handle_t *hdl = zhp->zfs_hdl; 4599 zprop_list_t *entry; 4600 zprop_list_t **last, **start; 4601 nvlist_t *userprops, *propval; 4602 nvpair_t *elem; 4603 char *strval; 4604 char buf[ZFS_MAXPROPLEN]; 4605 4606 if (zprop_expand_list(hdl, plp, ZFS_TYPE_DATASET) != 0) 4607 return (-1); 4608 4609 userprops = zfs_get_user_props(zhp); 4610 4611 entry = *plp; 4612 if (entry->pl_all && nvlist_next_nvpair(userprops, NULL) != NULL) { 4613 /* 4614 * Go through and add any user properties as necessary. We 4615 * start by incrementing our list pointer to the first 4616 * non-native property. 4617 */ 4618 start = plp; 4619 while (*start != NULL) { 4620 if ((*start)->pl_prop == ZPROP_INVAL) 4621 break; 4622 start = &(*start)->pl_next; 4623 } 4624 4625 elem = NULL; 4626 while ((elem = nvlist_next_nvpair(userprops, elem)) != NULL) { 4627 /* 4628 * See if we've already found this property in our list. 4629 */ 4630 for (last = start; *last != NULL; 4631 last = &(*last)->pl_next) { 4632 if (strcmp((*last)->pl_user_prop, 4633 nvpair_name(elem)) == 0) 4634 break; 4635 } 4636 4637 if (*last == NULL) { 4638 if ((entry = zfs_alloc(hdl, 4639 sizeof (zprop_list_t))) == NULL || 4640 ((entry->pl_user_prop = zfs_strdup(hdl, 4641 nvpair_name(elem)))) == NULL) { 4642 free(entry); 4643 return (-1); 4644 } 4645 4646 entry->pl_prop = ZPROP_INVAL; 4647 entry->pl_width = strlen(nvpair_name(elem)); 4648 entry->pl_all = B_TRUE; 4649 *last = entry; 4650 } 4651 } 4652 } 4653 4654 /* 4655 * Now go through and check the width of any non-fixed columns 4656 */ 4657 for (entry = *plp; entry != NULL; entry = entry->pl_next) { 4658 if (entry->pl_fixed && !literal) 4659 continue; 4660 4661 if (entry->pl_prop != ZPROP_INVAL) { 4662 if (zfs_prop_get(zhp, entry->pl_prop, 4663 buf, sizeof (buf), NULL, NULL, 0, literal) == 0) { 4664 if (strlen(buf) > entry->pl_width) 4665 entry->pl_width = strlen(buf); 4666 } 4667 if (received && zfs_prop_get_recvd(zhp, 4668 zfs_prop_to_name(entry->pl_prop), 4669 buf, sizeof (buf), literal) == 0) 4670 if (strlen(buf) > entry->pl_recvd_width) 4671 entry->pl_recvd_width = strlen(buf); 4672 } else { 4673 if (nvlist_lookup_nvlist(userprops, entry->pl_user_prop, 4674 &propval) == 0) { 4675 verify(nvlist_lookup_string(propval, 4676 ZPROP_VALUE, &strval) == 0); 4677 if (strlen(strval) > entry->pl_width) 4678 entry->pl_width = strlen(strval); 4679 } 4680 if (received && zfs_prop_get_recvd(zhp, 4681 entry->pl_user_prop, 4682 buf, sizeof (buf), literal) == 0) 4683 if (strlen(buf) > entry->pl_recvd_width) 4684 entry->pl_recvd_width = strlen(buf); 4685 } 4686 } 4687 4688 return (0); 4689 } 4690 4691 void 4692 zfs_prune_proplist(zfs_handle_t *zhp, uint8_t *props) 4693 { 4694 nvpair_t *curr; 4695 nvpair_t *next; 4696 4697 /* 4698 * Keep a reference to the props-table against which we prune the 4699 * properties. 4700 */ 4701 zhp->zfs_props_table = props; 4702 4703 curr = nvlist_next_nvpair(zhp->zfs_props, NULL); 4704 4705 while (curr) { 4706 zfs_prop_t zfs_prop = zfs_name_to_prop(nvpair_name(curr)); 4707 next = nvlist_next_nvpair(zhp->zfs_props, curr); 4708 4709 /* 4710 * User properties will result in ZPROP_INVAL, and since we 4711 * only know how to prune standard ZFS properties, we always 4712 * leave these in the list. This can also happen if we 4713 * encounter an unknown DSL property (when running older 4714 * software, for example). 4715 */ 4716 if (zfs_prop != ZPROP_INVAL && props[zfs_prop] == B_FALSE) 4717 (void) nvlist_remove(zhp->zfs_props, 4718 nvpair_name(curr), nvpair_type(curr)); 4719 curr = next; 4720 } 4721 } 4722 4723 static int 4724 zfs_smb_acl_mgmt(libzfs_handle_t *hdl, char *dataset, char *path, 4725 zfs_smb_acl_op_t cmd, char *resource1, char *resource2) 4726 { 4727 zfs_cmd_t zc = {"\0"}; 4728 nvlist_t *nvlist = NULL; 4729 int error; 4730 4731 (void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name)); 4732 (void) strlcpy(zc.zc_value, path, sizeof (zc.zc_value)); 4733 zc.zc_cookie = (uint64_t)cmd; 4734 4735 if (cmd == ZFS_SMB_ACL_RENAME) { 4736 if (nvlist_alloc(&nvlist, NV_UNIQUE_NAME, 0) != 0) { 4737 (void) no_memory(hdl); 4738 return (0); 4739 } 4740 } 4741 4742 switch (cmd) { 4743 case ZFS_SMB_ACL_ADD: 4744 case ZFS_SMB_ACL_REMOVE: 4745 (void) strlcpy(zc.zc_string, resource1, sizeof (zc.zc_string)); 4746 break; 4747 case ZFS_SMB_ACL_RENAME: 4748 if (nvlist_add_string(nvlist, ZFS_SMB_ACL_SRC, 4749 resource1) != 0) { 4750 (void) no_memory(hdl); 4751 return (-1); 4752 } 4753 if (nvlist_add_string(nvlist, ZFS_SMB_ACL_TARGET, 4754 resource2) != 0) { 4755 (void) no_memory(hdl); 4756 return (-1); 4757 } 4758 if (zcmd_write_src_nvlist(hdl, &zc, nvlist) != 0) { 4759 nvlist_free(nvlist); 4760 return (-1); 4761 } 4762 break; 4763 case ZFS_SMB_ACL_PURGE: 4764 break; 4765 default: 4766 return (-1); 4767 } 4768 error = ioctl(hdl->libzfs_fd, ZFS_IOC_SMB_ACL, &zc); 4769 nvlist_free(nvlist); 4770 return (error); 4771 } 4772 4773 int 4774 zfs_smb_acl_add(libzfs_handle_t *hdl, char *dataset, 4775 char *path, char *resource) 4776 { 4777 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_ADD, 4778 resource, NULL)); 4779 } 4780 4781 int 4782 zfs_smb_acl_remove(libzfs_handle_t *hdl, char *dataset, 4783 char *path, char *resource) 4784 { 4785 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_REMOVE, 4786 resource, NULL)); 4787 } 4788 4789 int 4790 zfs_smb_acl_purge(libzfs_handle_t *hdl, char *dataset, char *path) 4791 { 4792 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_PURGE, 4793 NULL, NULL)); 4794 } 4795 4796 int 4797 zfs_smb_acl_rename(libzfs_handle_t *hdl, char *dataset, char *path, 4798 char *oldname, char *newname) 4799 { 4800 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_RENAME, 4801 oldname, newname)); 4802 } 4803 4804 int 4805 zfs_userspace(zfs_handle_t *zhp, zfs_userquota_prop_t type, 4806 zfs_userspace_cb_t func, void *arg) 4807 { 4808 zfs_cmd_t zc = {"\0"}; 4809 zfs_useracct_t buf[100]; 4810 libzfs_handle_t *hdl = zhp->zfs_hdl; 4811 int ret; 4812 4813 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 4814 4815 zc.zc_objset_type = type; 4816 zc.zc_nvlist_dst = (uintptr_t)buf; 4817 4818 for (;;) { 4819 zfs_useracct_t *zua = buf; 4820 4821 zc.zc_nvlist_dst_size = sizeof (buf); 4822 if (zfs_ioctl(hdl, ZFS_IOC_USERSPACE_MANY, &zc) != 0) { 4823 char errbuf[1024]; 4824 4825 if ((errno == ENOTSUP && 4826 (type == ZFS_PROP_USEROBJUSED || 4827 type == ZFS_PROP_GROUPOBJUSED || 4828 type == ZFS_PROP_USEROBJQUOTA || 4829 type == ZFS_PROP_GROUPOBJQUOTA || 4830 type == ZFS_PROP_PROJECTOBJUSED || 4831 type == ZFS_PROP_PROJECTOBJQUOTA || 4832 type == ZFS_PROP_PROJECTUSED || 4833 type == ZFS_PROP_PROJECTQUOTA))) 4834 break; 4835 4836 (void) snprintf(errbuf, sizeof (errbuf), 4837 dgettext(TEXT_DOMAIN, 4838 "cannot get used/quota for %s"), zc.zc_name); 4839 return (zfs_standard_error_fmt(hdl, errno, errbuf)); 4840 } 4841 if (zc.zc_nvlist_dst_size == 0) 4842 break; 4843 4844 while (zc.zc_nvlist_dst_size > 0) { 4845 if ((ret = func(arg, zua->zu_domain, zua->zu_rid, 4846 zua->zu_space)) != 0) 4847 return (ret); 4848 zua++; 4849 zc.zc_nvlist_dst_size -= sizeof (zfs_useracct_t); 4850 } 4851 } 4852 4853 return (0); 4854 } 4855 4856 struct holdarg { 4857 nvlist_t *nvl; 4858 const char *snapname; 4859 const char *tag; 4860 boolean_t recursive; 4861 int error; 4862 }; 4863 4864 static int 4865 zfs_hold_one(zfs_handle_t *zhp, void *arg) 4866 { 4867 struct holdarg *ha = arg; 4868 char name[ZFS_MAX_DATASET_NAME_LEN]; 4869 int rv = 0; 4870 4871 if (snprintf(name, sizeof (name), "%s@%s", zhp->zfs_name, 4872 ha->snapname) >= sizeof (name)) 4873 return (EINVAL); 4874 4875 if (lzc_exists(name)) 4876 fnvlist_add_string(ha->nvl, name, ha->tag); 4877 4878 if (ha->recursive) 4879 rv = zfs_iter_filesystems(zhp, zfs_hold_one, ha); 4880 zfs_close(zhp); 4881 return (rv); 4882 } 4883 4884 int 4885 zfs_hold(zfs_handle_t *zhp, const char *snapname, const char *tag, 4886 boolean_t recursive, int cleanup_fd) 4887 { 4888 int ret; 4889 struct holdarg ha; 4890 4891 ha.nvl = fnvlist_alloc(); 4892 ha.snapname = snapname; 4893 ha.tag = tag; 4894 ha.recursive = recursive; 4895 (void) zfs_hold_one(zfs_handle_dup(zhp), &ha); 4896 4897 if (nvlist_empty(ha.nvl)) { 4898 char errbuf[1024]; 4899 4900 fnvlist_free(ha.nvl); 4901 ret = ENOENT; 4902 (void) snprintf(errbuf, sizeof (errbuf), 4903 dgettext(TEXT_DOMAIN, 4904 "cannot hold snapshot '%s@%s'"), 4905 zhp->zfs_name, snapname); 4906 (void) zfs_standard_error(zhp->zfs_hdl, ret, errbuf); 4907 return (ret); 4908 } 4909 4910 ret = zfs_hold_nvl(zhp, cleanup_fd, ha.nvl); 4911 fnvlist_free(ha.nvl); 4912 4913 return (ret); 4914 } 4915 4916 int 4917 zfs_hold_nvl(zfs_handle_t *zhp, int cleanup_fd, nvlist_t *holds) 4918 { 4919 int ret; 4920 nvlist_t *errors; 4921 libzfs_handle_t *hdl = zhp->zfs_hdl; 4922 char errbuf[1024]; 4923 nvpair_t *elem; 4924 4925 errors = NULL; 4926 ret = lzc_hold(holds, cleanup_fd, &errors); 4927 4928 if (ret == 0) { 4929 /* There may be errors even in the success case. */ 4930 fnvlist_free(errors); 4931 return (0); 4932 } 4933 4934 if (nvlist_empty(errors)) { 4935 /* no hold-specific errors */ 4936 (void) snprintf(errbuf, sizeof (errbuf), 4937 dgettext(TEXT_DOMAIN, "cannot hold")); 4938 switch (ret) { 4939 case ENOTSUP: 4940 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4941 "pool must be upgraded")); 4942 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf); 4943 break; 4944 case EINVAL: 4945 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf); 4946 break; 4947 default: 4948 (void) zfs_standard_error(hdl, ret, errbuf); 4949 } 4950 } 4951 4952 for (elem = nvlist_next_nvpair(errors, NULL); 4953 elem != NULL; 4954 elem = nvlist_next_nvpair(errors, elem)) { 4955 (void) snprintf(errbuf, sizeof (errbuf), 4956 dgettext(TEXT_DOMAIN, 4957 "cannot hold snapshot '%s'"), nvpair_name(elem)); 4958 switch (fnvpair_value_int32(elem)) { 4959 case E2BIG: 4960 /* 4961 * Temporary tags wind up having the ds object id 4962 * prepended. So even if we passed the length check 4963 * above, it's still possible for the tag to wind 4964 * up being slightly too long. 4965 */ 4966 (void) zfs_error(hdl, EZFS_TAGTOOLONG, errbuf); 4967 break; 4968 case EINVAL: 4969 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf); 4970 break; 4971 case EEXIST: 4972 (void) zfs_error(hdl, EZFS_REFTAG_HOLD, errbuf); 4973 break; 4974 default: 4975 (void) zfs_standard_error(hdl, 4976 fnvpair_value_int32(elem), errbuf); 4977 } 4978 } 4979 4980 fnvlist_free(errors); 4981 return (ret); 4982 } 4983 4984 static int 4985 zfs_release_one(zfs_handle_t *zhp, void *arg) 4986 { 4987 struct holdarg *ha = arg; 4988 char name[ZFS_MAX_DATASET_NAME_LEN]; 4989 int rv = 0; 4990 nvlist_t *existing_holds; 4991 4992 if (snprintf(name, sizeof (name), "%s@%s", zhp->zfs_name, 4993 ha->snapname) >= sizeof (name)) { 4994 ha->error = EINVAL; 4995 rv = EINVAL; 4996 } 4997 4998 if (lzc_get_holds(name, &existing_holds) != 0) { 4999 ha->error = ENOENT; 5000 } else if (!nvlist_exists(existing_holds, ha->tag)) { 5001 ha->error = ESRCH; 5002 } else { 5003 nvlist_t *torelease = fnvlist_alloc(); 5004 fnvlist_add_boolean(torelease, ha->tag); 5005 fnvlist_add_nvlist(ha->nvl, name, torelease); 5006 fnvlist_free(torelease); 5007 } 5008 5009 if (ha->recursive) 5010 rv = zfs_iter_filesystems(zhp, zfs_release_one, ha); 5011 zfs_close(zhp); 5012 return (rv); 5013 } 5014 5015 int 5016 zfs_release(zfs_handle_t *zhp, const char *snapname, const char *tag, 5017 boolean_t recursive) 5018 { 5019 int ret; 5020 struct holdarg ha; 5021 nvlist_t *errors = NULL; 5022 nvpair_t *elem; 5023 libzfs_handle_t *hdl = zhp->zfs_hdl; 5024 char errbuf[1024]; 5025 5026 ha.nvl = fnvlist_alloc(); 5027 ha.snapname = snapname; 5028 ha.tag = tag; 5029 ha.recursive = recursive; 5030 ha.error = 0; 5031 (void) zfs_release_one(zfs_handle_dup(zhp), &ha); 5032 5033 if (nvlist_empty(ha.nvl)) { 5034 fnvlist_free(ha.nvl); 5035 ret = ha.error; 5036 (void) snprintf(errbuf, sizeof (errbuf), 5037 dgettext(TEXT_DOMAIN, 5038 "cannot release hold from snapshot '%s@%s'"), 5039 zhp->zfs_name, snapname); 5040 if (ret == ESRCH) { 5041 (void) zfs_error(hdl, EZFS_REFTAG_RELE, errbuf); 5042 } else { 5043 (void) zfs_standard_error(hdl, ret, errbuf); 5044 } 5045 return (ret); 5046 } 5047 5048 ret = lzc_release(ha.nvl, &errors); 5049 fnvlist_free(ha.nvl); 5050 5051 if (ret == 0) { 5052 /* There may be errors even in the success case. */ 5053 fnvlist_free(errors); 5054 return (0); 5055 } 5056 5057 if (nvlist_empty(errors)) { 5058 /* no hold-specific errors */ 5059 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 5060 "cannot release")); 5061 switch (errno) { 5062 case ENOTSUP: 5063 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 5064 "pool must be upgraded")); 5065 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf); 5066 break; 5067 default: 5068 (void) zfs_standard_error_fmt(hdl, errno, errbuf); 5069 } 5070 } 5071 5072 for (elem = nvlist_next_nvpair(errors, NULL); 5073 elem != NULL; 5074 elem = nvlist_next_nvpair(errors, elem)) { 5075 (void) snprintf(errbuf, sizeof (errbuf), 5076 dgettext(TEXT_DOMAIN, 5077 "cannot release hold from snapshot '%s'"), 5078 nvpair_name(elem)); 5079 switch (fnvpair_value_int32(elem)) { 5080 case ESRCH: 5081 (void) zfs_error(hdl, EZFS_REFTAG_RELE, errbuf); 5082 break; 5083 case EINVAL: 5084 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf); 5085 break; 5086 default: 5087 (void) zfs_standard_error_fmt(hdl, 5088 fnvpair_value_int32(elem), errbuf); 5089 } 5090 } 5091 5092 fnvlist_free(errors); 5093 return (ret); 5094 } 5095 5096 int 5097 zfs_get_fsacl(zfs_handle_t *zhp, nvlist_t **nvl) 5098 { 5099 zfs_cmd_t zc = {"\0"}; 5100 libzfs_handle_t *hdl = zhp->zfs_hdl; 5101 int nvsz = 2048; 5102 void *nvbuf; 5103 int err = 0; 5104 char errbuf[1024]; 5105 5106 assert(zhp->zfs_type == ZFS_TYPE_VOLUME || 5107 zhp->zfs_type == ZFS_TYPE_FILESYSTEM); 5108 5109 tryagain: 5110 5111 nvbuf = malloc(nvsz); 5112 if (nvbuf == NULL) { 5113 err = (zfs_error(hdl, EZFS_NOMEM, strerror(errno))); 5114 goto out; 5115 } 5116 5117 zc.zc_nvlist_dst_size = nvsz; 5118 zc.zc_nvlist_dst = (uintptr_t)nvbuf; 5119 5120 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 5121 5122 if (zfs_ioctl(hdl, ZFS_IOC_GET_FSACL, &zc) != 0) { 5123 (void) snprintf(errbuf, sizeof (errbuf), 5124 dgettext(TEXT_DOMAIN, "cannot get permissions on '%s'"), 5125 zc.zc_name); 5126 switch (errno) { 5127 case ENOMEM: 5128 free(nvbuf); 5129 nvsz = zc.zc_nvlist_dst_size; 5130 goto tryagain; 5131 5132 case ENOTSUP: 5133 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 5134 "pool must be upgraded")); 5135 err = zfs_error(hdl, EZFS_BADVERSION, errbuf); 5136 break; 5137 case EINVAL: 5138 err = zfs_error(hdl, EZFS_BADTYPE, errbuf); 5139 break; 5140 case ENOENT: 5141 err = zfs_error(hdl, EZFS_NOENT, errbuf); 5142 break; 5143 default: 5144 err = zfs_standard_error_fmt(hdl, errno, errbuf); 5145 break; 5146 } 5147 } else { 5148 /* success */ 5149 int rc = nvlist_unpack(nvbuf, zc.zc_nvlist_dst_size, nvl, 0); 5150 if (rc) { 5151 (void) snprintf(errbuf, sizeof (errbuf), dgettext( 5152 TEXT_DOMAIN, "cannot get permissions on '%s'"), 5153 zc.zc_name); 5154 err = zfs_standard_error_fmt(hdl, rc, errbuf); 5155 } 5156 } 5157 5158 free(nvbuf); 5159 out: 5160 return (err); 5161 } 5162 5163 int 5164 zfs_set_fsacl(zfs_handle_t *zhp, boolean_t un, nvlist_t *nvl) 5165 { 5166 zfs_cmd_t zc = {"\0"}; 5167 libzfs_handle_t *hdl = zhp->zfs_hdl; 5168 char *nvbuf; 5169 char errbuf[1024]; 5170 size_t nvsz; 5171 int err; 5172 5173 assert(zhp->zfs_type == ZFS_TYPE_VOLUME || 5174 zhp->zfs_type == ZFS_TYPE_FILESYSTEM); 5175 5176 err = nvlist_size(nvl, &nvsz, NV_ENCODE_NATIVE); 5177 assert(err == 0); 5178 5179 nvbuf = malloc(nvsz); 5180 5181 err = nvlist_pack(nvl, &nvbuf, &nvsz, NV_ENCODE_NATIVE, 0); 5182 assert(err == 0); 5183 5184 zc.zc_nvlist_src_size = nvsz; 5185 zc.zc_nvlist_src = (uintptr_t)nvbuf; 5186 zc.zc_perm_action = un; 5187 5188 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 5189 5190 if (zfs_ioctl(hdl, ZFS_IOC_SET_FSACL, &zc) != 0) { 5191 (void) snprintf(errbuf, sizeof (errbuf), 5192 dgettext(TEXT_DOMAIN, "cannot set permissions on '%s'"), 5193 zc.zc_name); 5194 switch (errno) { 5195 case ENOTSUP: 5196 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 5197 "pool must be upgraded")); 5198 err = zfs_error(hdl, EZFS_BADVERSION, errbuf); 5199 break; 5200 case EINVAL: 5201 err = zfs_error(hdl, EZFS_BADTYPE, errbuf); 5202 break; 5203 case ENOENT: 5204 err = zfs_error(hdl, EZFS_NOENT, errbuf); 5205 break; 5206 default: 5207 err = zfs_standard_error_fmt(hdl, errno, errbuf); 5208 break; 5209 } 5210 } 5211 5212 free(nvbuf); 5213 5214 return (err); 5215 } 5216 5217 int 5218 zfs_get_holds(zfs_handle_t *zhp, nvlist_t **nvl) 5219 { 5220 int err; 5221 char errbuf[1024]; 5222 5223 err = lzc_get_holds(zhp->zfs_name, nvl); 5224 5225 if (err != 0) { 5226 libzfs_handle_t *hdl = zhp->zfs_hdl; 5227 5228 (void) snprintf(errbuf, sizeof (errbuf), 5229 dgettext(TEXT_DOMAIN, "cannot get holds for '%s'"), 5230 zhp->zfs_name); 5231 switch (err) { 5232 case ENOTSUP: 5233 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 5234 "pool must be upgraded")); 5235 err = zfs_error(hdl, EZFS_BADVERSION, errbuf); 5236 break; 5237 case EINVAL: 5238 err = zfs_error(hdl, EZFS_BADTYPE, errbuf); 5239 break; 5240 case ENOENT: 5241 err = zfs_error(hdl, EZFS_NOENT, errbuf); 5242 break; 5243 default: 5244 err = zfs_standard_error_fmt(hdl, errno, errbuf); 5245 break; 5246 } 5247 } 5248 5249 return (err); 5250 } 5251 5252 /* 5253 * The theory of raidz space accounting 5254 * 5255 * The "referenced" property of RAIDZ vdevs is scaled such that a 128KB block 5256 * will "reference" 128KB, even though it allocates more than that, to store the 5257 * parity information (and perhaps skip sectors). This concept of the 5258 * "referenced" (and other DMU space accounting) being lower than the allocated 5259 * space by a constant factor is called "raidz deflation." 5260 * 5261 * As mentioned above, the constant factor for raidz deflation assumes a 128KB 5262 * block size. However, zvols typically have a much smaller block size (default 5263 * 8KB). These smaller blocks may require proportionally much more parity 5264 * information (and perhaps skip sectors). In this case, the change to the 5265 * "referenced" property may be much more than the logical block size. 5266 * 5267 * Suppose a raidz vdev has 5 disks with ashift=12. A 128k block may be written 5268 * as follows. 5269 * 5270 * +-------+-------+-------+-------+-------+ 5271 * | disk1 | disk2 | disk3 | disk4 | disk5 | 5272 * +-------+-------+-------+-------+-------+ 5273 * | P0 | D0 | D8 | D16 | D24 | 5274 * | P1 | D1 | D9 | D17 | D25 | 5275 * | P2 | D2 | D10 | D18 | D26 | 5276 * | P3 | D3 | D11 | D19 | D27 | 5277 * | P4 | D4 | D12 | D20 | D28 | 5278 * | P5 | D5 | D13 | D21 | D29 | 5279 * | P6 | D6 | D14 | D22 | D30 | 5280 * | P7 | D7 | D15 | D23 | D31 | 5281 * +-------+-------+-------+-------+-------+ 5282 * 5283 * Above, notice that 160k was allocated: 8 x 4k parity sectors + 32 x 4k data 5284 * sectors. The dataset's referenced will increase by 128k and the pool's 5285 * allocated and free properties will be adjusted by 160k. 5286 * 5287 * A 4k block written to the same raidz vdev will require two 4k sectors. The 5288 * blank cells represent unallocated space. 5289 * 5290 * +-------+-------+-------+-------+-------+ 5291 * | disk1 | disk2 | disk3 | disk4 | disk5 | 5292 * +-------+-------+-------+-------+-------+ 5293 * | P0 | D0 | | | | 5294 * +-------+-------+-------+-------+-------+ 5295 * 5296 * Above, notice that the 4k block required one sector for parity and another 5297 * for data. vdev_raidz_asize() will return 8k and as such the pool's allocated 5298 * and free properties will be adjusted by 8k. The dataset will not be charged 5299 * 8k. Rather, it will be charged a value that is scaled according to the 5300 * overhead of the 128k block on the same vdev. This 8k allocation will be 5301 * charged 8k * 128k / 160k. 128k is from SPA_OLD_MAXBLOCKSIZE and 160k is as 5302 * calculated in the 128k block example above. 5303 * 5304 * Every raidz allocation is sized to be a multiple of nparity+1 sectors. That 5305 * is, every raidz1 allocation will be a multiple of 2 sectors, raidz2 5306 * allocations are a multiple of 3 sectors, and raidz3 allocations are a 5307 * multiple of of 4 sectors. When a block does not fill the required number of 5308 * sectors, skip blocks (sectors) are used. 5309 * 5310 * An 8k block being written to a raidz vdev may be written as follows: 5311 * 5312 * +-------+-------+-------+-------+-------+ 5313 * | disk1 | disk2 | disk3 | disk4 | disk5 | 5314 * +-------+-------+-------+-------+-------+ 5315 * | P0 | D0 | D1 | S0 | | 5316 * +-------+-------+-------+-------+-------+ 5317 * 5318 * In order to maintain the nparity+1 allocation size, a skip block (S0) was 5319 * added. For this 8k block, the pool's allocated and free properties are 5320 * adjusted by 16k and the dataset's referenced is increased by 16k * 128k / 5321 * 160k. Again, 128k is from SPA_OLD_MAXBLOCKSIZE and 160k is as calculated in 5322 * the 128k block example above. 5323 * 5324 * Compression may lead to a variety of block sizes being written for the same 5325 * volume or file. There is no clear way to reserve just the amount of space 5326 * that will be required, so the worst case (no compression) is assumed. 5327 * Note that metadata blocks will typically be compressed, so the reservation 5328 * size returned by zvol_volsize_to_reservation() will generally be slightly 5329 * larger than the maximum that the volume can reference. 5330 */ 5331 5332 /* 5333 * Derived from function of same name in module/zfs/vdev_raidz.c. Returns the 5334 * amount of space (in bytes) that will be allocated for the specified block 5335 * size. Note that the "referenced" space accounted will be less than this, but 5336 * not necessarily equal to "blksize", due to RAIDZ deflation. 5337 */ 5338 static uint64_t 5339 vdev_raidz_asize(uint64_t ndisks, uint64_t nparity, uint64_t ashift, 5340 uint64_t blksize) 5341 { 5342 uint64_t asize, ndata; 5343 5344 ASSERT3U(ndisks, >, nparity); 5345 ndata = ndisks - nparity; 5346 asize = ((blksize - 1) >> ashift) + 1; 5347 asize += nparity * ((asize + ndata - 1) / ndata); 5348 asize = roundup(asize, nparity + 1) << ashift; 5349 5350 return (asize); 5351 } 5352 5353 /* 5354 * Determine how much space will be allocated if it lands on the most space- 5355 * inefficient top-level vdev. Returns the size in bytes required to store one 5356 * copy of the volume data. See theory comment above. 5357 */ 5358 static uint64_t 5359 volsize_from_vdevs(zpool_handle_t *zhp, uint64_t nblocks, uint64_t blksize) 5360 { 5361 nvlist_t *config, *tree, **vdevs; 5362 uint_t nvdevs, v; 5363 uint64_t ret = 0; 5364 5365 config = zpool_get_config(zhp, NULL); 5366 if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, &tree) != 0 || 5367 nvlist_lookup_nvlist_array(tree, ZPOOL_CONFIG_CHILDREN, 5368 &vdevs, &nvdevs) != 0) { 5369 return (nblocks * blksize); 5370 } 5371 5372 for (v = 0; v < nvdevs; v++) { 5373 char *type; 5374 uint64_t nparity, ashift, asize, tsize; 5375 nvlist_t **disks; 5376 uint_t ndisks; 5377 uint64_t volsize; 5378 5379 if (nvlist_lookup_string(vdevs[v], ZPOOL_CONFIG_TYPE, 5380 &type) != 0 || strcmp(type, VDEV_TYPE_RAIDZ) != 0 || 5381 nvlist_lookup_uint64(vdevs[v], ZPOOL_CONFIG_NPARITY, 5382 &nparity) != 0 || 5383 nvlist_lookup_uint64(vdevs[v], ZPOOL_CONFIG_ASHIFT, 5384 &ashift) != 0 || 5385 nvlist_lookup_nvlist_array(vdevs[v], ZPOOL_CONFIG_CHILDREN, 5386 &disks, &ndisks) != 0) { 5387 continue; 5388 } 5389 5390 /* allocation size for the "typical" 128k block */ 5391 tsize = vdev_raidz_asize(ndisks, nparity, ashift, 5392 SPA_OLD_MAXBLOCKSIZE); 5393 /* allocation size for the blksize block */ 5394 asize = vdev_raidz_asize(ndisks, nparity, ashift, blksize); 5395 5396 /* 5397 * Scale this size down as a ratio of 128k / tsize. See theory 5398 * statement above. 5399 */ 5400 volsize = nblocks * asize * SPA_OLD_MAXBLOCKSIZE / tsize; 5401 if (volsize > ret) { 5402 ret = volsize; 5403 } 5404 } 5405 5406 if (ret == 0) { 5407 ret = nblocks * blksize; 5408 } 5409 5410 return (ret); 5411 } 5412 5413 /* 5414 * Convert the zvol's volume size to an appropriate reservation. See theory 5415 * comment above. 5416 * 5417 * Note: If this routine is updated, it is necessary to update the ZFS test 5418 * suite's shell version in reservation.shlib. 5419 */ 5420 uint64_t 5421 zvol_volsize_to_reservation(zpool_handle_t *zph, uint64_t volsize, 5422 nvlist_t *props) 5423 { 5424 uint64_t numdb; 5425 uint64_t nblocks, volblocksize; 5426 int ncopies; 5427 char *strval; 5428 5429 if (nvlist_lookup_string(props, 5430 zfs_prop_to_name(ZFS_PROP_COPIES), &strval) == 0) 5431 ncopies = atoi(strval); 5432 else 5433 ncopies = 1; 5434 if (nvlist_lookup_uint64(props, 5435 zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE), 5436 &volblocksize) != 0) 5437 volblocksize = ZVOL_DEFAULT_BLOCKSIZE; 5438 5439 nblocks = volsize / volblocksize; 5440 /* 5441 * Metadata defaults to using 128k blocks, not volblocksize blocks. For 5442 * this reason, only the data blocks are scaled based on vdev config. 5443 */ 5444 volsize = volsize_from_vdevs(zph, nblocks, volblocksize); 5445 5446 /* start with metadnode L0-L6 */ 5447 numdb = 7; 5448 /* calculate number of indirects */ 5449 while (nblocks > 1) { 5450 nblocks += DNODES_PER_LEVEL - 1; 5451 nblocks /= DNODES_PER_LEVEL; 5452 numdb += nblocks; 5453 } 5454 numdb *= MIN(SPA_DVAS_PER_BP, ncopies + 1); 5455 volsize *= ncopies; 5456 /* 5457 * this is exactly DN_MAX_INDBLKSHIFT when metadata isn't 5458 * compressed, but in practice they compress down to about 5459 * 1100 bytes 5460 */ 5461 numdb *= 1ULL << DN_MAX_INDBLKSHIFT; 5462 volsize += numdb; 5463 return (volsize); 5464 } 5465 5466 /* 5467 * Wait for the given activity and return the status of the wait (whether or not 5468 * any waiting was done) in the 'waited' parameter. Non-existent fses are 5469 * reported via the 'missing' parameter, rather than by printing an error 5470 * message. This is convenient when this function is called in a loop over a 5471 * long period of time (as it is, for example, by zfs's wait cmd). In that 5472 * scenario, a fs being exported or destroyed should be considered a normal 5473 * event, so we don't want to print an error when we find that the fs doesn't 5474 * exist. 5475 */ 5476 int 5477 zfs_wait_status(zfs_handle_t *zhp, zfs_wait_activity_t activity, 5478 boolean_t *missing, boolean_t *waited) 5479 { 5480 int error = lzc_wait_fs(zhp->zfs_name, activity, waited); 5481 *missing = (error == ENOENT); 5482 if (*missing) 5483 return (0); 5484 5485 if (error != 0) { 5486 (void) zfs_standard_error_fmt(zhp->zfs_hdl, error, 5487 dgettext(TEXT_DOMAIN, "error waiting in fs '%s'"), 5488 zhp->zfs_name); 5489 } 5490 5491 return (error); 5492 } 5493