libzfs_dataset.c revision 1.1.1.2
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 2010 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #include <ctype.h> 28 #include <errno.h> 29 #include <libintl.h> 30 #include <math.h> 31 #include <stdio.h> 32 #include <stdlib.h> 33 #include <strings.h> 34 #include <unistd.h> 35 #include <stddef.h> 36 #include <zone.h> 37 #include <fcntl.h> 38 #include <sys/mntent.h> 39 #include <sys/mount.h> 40 #include <priv.h> 41 #include <pwd.h> 42 #include <grp.h> 43 #include <stddef.h> 44 #include <ucred.h> 45 #include <idmap.h> 46 #include <aclutils.h> 47 #include <directory.h> 48 49 #include <sys/dnode.h> 50 #include <sys/spa.h> 51 #include <sys/zap.h> 52 #include <libzfs.h> 53 54 #include "zfs_namecheck.h" 55 #include "zfs_prop.h" 56 #include "libzfs_impl.h" 57 #include "zfs_deleg.h" 58 59 static int userquota_propname_decode(const char *propname, boolean_t zoned, 60 zfs_userquota_prop_t *typep, char *domain, int domainlen, uint64_t *ridp); 61 62 /* 63 * Given a single type (not a mask of types), return the type in a human 64 * readable form. 65 */ 66 const char * 67 zfs_type_to_name(zfs_type_t type) 68 { 69 switch (type) { 70 case ZFS_TYPE_FILESYSTEM: 71 return (dgettext(TEXT_DOMAIN, "filesystem")); 72 case ZFS_TYPE_SNAPSHOT: 73 return (dgettext(TEXT_DOMAIN, "snapshot")); 74 case ZFS_TYPE_VOLUME: 75 return (dgettext(TEXT_DOMAIN, "volume")); 76 } 77 78 return (NULL); 79 } 80 81 /* 82 * Given a path and mask of ZFS types, return a string describing this dataset. 83 * This is used when we fail to open a dataset and we cannot get an exact type. 84 * We guess what the type would have been based on the path and the mask of 85 * acceptable types. 86 */ 87 static const char * 88 path_to_str(const char *path, int types) 89 { 90 /* 91 * When given a single type, always report the exact type. 92 */ 93 if (types == ZFS_TYPE_SNAPSHOT) 94 return (dgettext(TEXT_DOMAIN, "snapshot")); 95 if (types == ZFS_TYPE_FILESYSTEM) 96 return (dgettext(TEXT_DOMAIN, "filesystem")); 97 if (types == ZFS_TYPE_VOLUME) 98 return (dgettext(TEXT_DOMAIN, "volume")); 99 100 /* 101 * The user is requesting more than one type of dataset. If this is the 102 * case, consult the path itself. If we're looking for a snapshot, and 103 * a '@' is found, then report it as "snapshot". Otherwise, remove the 104 * snapshot attribute and try again. 105 */ 106 if (types & ZFS_TYPE_SNAPSHOT) { 107 if (strchr(path, '@') != NULL) 108 return (dgettext(TEXT_DOMAIN, "snapshot")); 109 return (path_to_str(path, types & ~ZFS_TYPE_SNAPSHOT)); 110 } 111 112 /* 113 * The user has requested either filesystems or volumes. 114 * We have no way of knowing a priori what type this would be, so always 115 * report it as "filesystem" or "volume", our two primitive types. 116 */ 117 if (types & ZFS_TYPE_FILESYSTEM) 118 return (dgettext(TEXT_DOMAIN, "filesystem")); 119 120 assert(types & ZFS_TYPE_VOLUME); 121 return (dgettext(TEXT_DOMAIN, "volume")); 122 } 123 124 /* 125 * Validate a ZFS path. This is used even before trying to open the dataset, to 126 * provide a more meaningful error message. We call zfs_error_aux() to 127 * explain exactly why the name was not valid. 128 */ 129 static int 130 zfs_validate_name(libzfs_handle_t *hdl, const char *path, int type, 131 boolean_t modifying) 132 { 133 namecheck_err_t why; 134 char what; 135 136 if (dataset_namecheck(path, &why, &what) != 0) { 137 if (hdl != NULL) { 138 switch (why) { 139 case NAME_ERR_TOOLONG: 140 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 141 "name is too long")); 142 break; 143 144 case NAME_ERR_LEADING_SLASH: 145 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 146 "leading slash in name")); 147 break; 148 149 case NAME_ERR_EMPTY_COMPONENT: 150 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 151 "empty component in name")); 152 break; 153 154 case NAME_ERR_TRAILING_SLASH: 155 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 156 "trailing slash in name")); 157 break; 158 159 case NAME_ERR_INVALCHAR: 160 zfs_error_aux(hdl, 161 dgettext(TEXT_DOMAIN, "invalid character " 162 "'%c' in name"), what); 163 break; 164 165 case NAME_ERR_MULTIPLE_AT: 166 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 167 "multiple '@' delimiters in name")); 168 break; 169 170 case NAME_ERR_NOLETTER: 171 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 172 "pool doesn't begin with a letter")); 173 break; 174 175 case NAME_ERR_RESERVED: 176 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 177 "name is reserved")); 178 break; 179 180 case NAME_ERR_DISKLIKE: 181 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 182 "reserved disk name")); 183 break; 184 } 185 } 186 187 return (0); 188 } 189 190 if (!(type & ZFS_TYPE_SNAPSHOT) && strchr(path, '@') != NULL) { 191 if (hdl != NULL) 192 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 193 "snapshot delimiter '@' in filesystem name")); 194 return (0); 195 } 196 197 if (type == ZFS_TYPE_SNAPSHOT && strchr(path, '@') == NULL) { 198 if (hdl != NULL) 199 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 200 "missing '@' delimiter in snapshot name")); 201 return (0); 202 } 203 204 if (modifying && strchr(path, '%') != NULL) { 205 if (hdl != NULL) 206 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 207 "invalid character %c in name"), '%'); 208 return (0); 209 } 210 211 return (-1); 212 } 213 214 int 215 zfs_name_valid(const char *name, zfs_type_t type) 216 { 217 if (type == ZFS_TYPE_POOL) 218 return (zpool_name_valid(NULL, B_FALSE, name)); 219 return (zfs_validate_name(NULL, name, type, B_FALSE)); 220 } 221 222 /* 223 * This function takes the raw DSL properties, and filters out the user-defined 224 * properties into a separate nvlist. 225 */ 226 static nvlist_t * 227 process_user_props(zfs_handle_t *zhp, nvlist_t *props) 228 { 229 libzfs_handle_t *hdl = zhp->zfs_hdl; 230 nvpair_t *elem; 231 nvlist_t *propval; 232 nvlist_t *nvl; 233 234 if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0) { 235 (void) no_memory(hdl); 236 return (NULL); 237 } 238 239 elem = NULL; 240 while ((elem = nvlist_next_nvpair(props, elem)) != NULL) { 241 if (!zfs_prop_user(nvpair_name(elem))) 242 continue; 243 244 verify(nvpair_value_nvlist(elem, &propval) == 0); 245 if (nvlist_add_nvlist(nvl, nvpair_name(elem), propval) != 0) { 246 nvlist_free(nvl); 247 (void) no_memory(hdl); 248 return (NULL); 249 } 250 } 251 252 return (nvl); 253 } 254 255 static zpool_handle_t * 256 zpool_add_handle(zfs_handle_t *zhp, const char *pool_name) 257 { 258 libzfs_handle_t *hdl = zhp->zfs_hdl; 259 zpool_handle_t *zph; 260 261 if ((zph = zpool_open_canfail(hdl, pool_name)) != NULL) { 262 if (hdl->libzfs_pool_handles != NULL) 263 zph->zpool_next = hdl->libzfs_pool_handles; 264 hdl->libzfs_pool_handles = zph; 265 } 266 return (zph); 267 } 268 269 static zpool_handle_t * 270 zpool_find_handle(zfs_handle_t *zhp, const char *pool_name, int len) 271 { 272 libzfs_handle_t *hdl = zhp->zfs_hdl; 273 zpool_handle_t *zph = hdl->libzfs_pool_handles; 274 275 while ((zph != NULL) && 276 (strncmp(pool_name, zpool_get_name(zph), len) != 0)) 277 zph = zph->zpool_next; 278 return (zph); 279 } 280 281 /* 282 * Returns a handle to the pool that contains the provided dataset. 283 * If a handle to that pool already exists then that handle is returned. 284 * Otherwise, a new handle is created and added to the list of handles. 285 */ 286 static zpool_handle_t * 287 zpool_handle(zfs_handle_t *zhp) 288 { 289 char *pool_name; 290 int len; 291 zpool_handle_t *zph; 292 293 len = strcspn(zhp->zfs_name, "/@") + 1; 294 pool_name = zfs_alloc(zhp->zfs_hdl, len); 295 (void) strlcpy(pool_name, zhp->zfs_name, len); 296 297 zph = zpool_find_handle(zhp, pool_name, len); 298 if (zph == NULL) 299 zph = zpool_add_handle(zhp, pool_name); 300 301 free(pool_name); 302 return (zph); 303 } 304 305 void 306 zpool_free_handles(libzfs_handle_t *hdl) 307 { 308 zpool_handle_t *next, *zph = hdl->libzfs_pool_handles; 309 310 while (zph != NULL) { 311 next = zph->zpool_next; 312 zpool_close(zph); 313 zph = next; 314 } 315 hdl->libzfs_pool_handles = NULL; 316 } 317 318 /* 319 * Utility function to gather stats (objset and zpl) for the given object. 320 */ 321 static int 322 get_stats_ioctl(zfs_handle_t *zhp, zfs_cmd_t *zc) 323 { 324 libzfs_handle_t *hdl = zhp->zfs_hdl; 325 326 (void) strlcpy(zc->zc_name, zhp->zfs_name, sizeof (zc->zc_name)); 327 328 while (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_STATS, zc) != 0) { 329 if (errno == ENOMEM) { 330 if (zcmd_expand_dst_nvlist(hdl, zc) != 0) { 331 return (-1); 332 } 333 } else { 334 return (-1); 335 } 336 } 337 return (0); 338 } 339 340 /* 341 * Utility function to get the received properties of the given object. 342 */ 343 static int 344 get_recvd_props_ioctl(zfs_handle_t *zhp) 345 { 346 libzfs_handle_t *hdl = zhp->zfs_hdl; 347 nvlist_t *recvdprops; 348 zfs_cmd_t zc = { 0 }; 349 int err; 350 351 if (zcmd_alloc_dst_nvlist(hdl, &zc, 0) != 0) 352 return (-1); 353 354 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 355 356 while (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_RECVD_PROPS, &zc) != 0) { 357 if (errno == ENOMEM) { 358 if (zcmd_expand_dst_nvlist(hdl, &zc) != 0) { 359 return (-1); 360 } 361 } else { 362 zcmd_free_nvlists(&zc); 363 return (-1); 364 } 365 } 366 367 err = zcmd_read_dst_nvlist(zhp->zfs_hdl, &zc, &recvdprops); 368 zcmd_free_nvlists(&zc); 369 if (err != 0) 370 return (-1); 371 372 nvlist_free(zhp->zfs_recvd_props); 373 zhp->zfs_recvd_props = recvdprops; 374 375 return (0); 376 } 377 378 static int 379 put_stats_zhdl(zfs_handle_t *zhp, zfs_cmd_t *zc) 380 { 381 nvlist_t *allprops, *userprops; 382 383 zhp->zfs_dmustats = zc->zc_objset_stats; /* structure assignment */ 384 385 if (zcmd_read_dst_nvlist(zhp->zfs_hdl, zc, &allprops) != 0) { 386 return (-1); 387 } 388 389 /* 390 * XXX Why do we store the user props separately, in addition to 391 * storing them in zfs_props? 392 */ 393 if ((userprops = process_user_props(zhp, allprops)) == NULL) { 394 nvlist_free(allprops); 395 return (-1); 396 } 397 398 nvlist_free(zhp->zfs_props); 399 nvlist_free(zhp->zfs_user_props); 400 401 zhp->zfs_props = allprops; 402 zhp->zfs_user_props = userprops; 403 404 return (0); 405 } 406 407 static int 408 get_stats(zfs_handle_t *zhp) 409 { 410 int rc = 0; 411 zfs_cmd_t zc = { 0 }; 412 413 if (zcmd_alloc_dst_nvlist(zhp->zfs_hdl, &zc, 0) != 0) 414 return (-1); 415 if (get_stats_ioctl(zhp, &zc) != 0) 416 rc = -1; 417 else if (put_stats_zhdl(zhp, &zc) != 0) 418 rc = -1; 419 zcmd_free_nvlists(&zc); 420 return (rc); 421 } 422 423 /* 424 * Refresh the properties currently stored in the handle. 425 */ 426 void 427 zfs_refresh_properties(zfs_handle_t *zhp) 428 { 429 (void) get_stats(zhp); 430 } 431 432 /* 433 * Makes a handle from the given dataset name. Used by zfs_open() and 434 * zfs_iter_* to create child handles on the fly. 435 */ 436 static int 437 make_dataset_handle_common(zfs_handle_t *zhp, zfs_cmd_t *zc) 438 { 439 if (put_stats_zhdl(zhp, zc) != 0) 440 return (-1); 441 442 /* 443 * We've managed to open the dataset and gather statistics. Determine 444 * the high-level type. 445 */ 446 if (zhp->zfs_dmustats.dds_type == DMU_OST_ZVOL) 447 zhp->zfs_head_type = ZFS_TYPE_VOLUME; 448 else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZFS) 449 zhp->zfs_head_type = ZFS_TYPE_FILESYSTEM; 450 else 451 abort(); 452 453 if (zhp->zfs_dmustats.dds_is_snapshot) 454 zhp->zfs_type = ZFS_TYPE_SNAPSHOT; 455 else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZVOL) 456 zhp->zfs_type = ZFS_TYPE_VOLUME; 457 else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZFS) 458 zhp->zfs_type = ZFS_TYPE_FILESYSTEM; 459 else 460 abort(); /* we should never see any other types */ 461 462 zhp->zpool_hdl = zpool_handle(zhp); 463 return (0); 464 } 465 466 zfs_handle_t * 467 make_dataset_handle(libzfs_handle_t *hdl, const char *path) 468 { 469 zfs_cmd_t zc = { 0 }; 470 471 zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1); 472 473 if (zhp == NULL) 474 return (NULL); 475 476 zhp->zfs_hdl = hdl; 477 (void) strlcpy(zhp->zfs_name, path, sizeof (zhp->zfs_name)); 478 if (zcmd_alloc_dst_nvlist(hdl, &zc, 0) != 0) { 479 free(zhp); 480 return (NULL); 481 } 482 if (get_stats_ioctl(zhp, &zc) == -1) { 483 zcmd_free_nvlists(&zc); 484 free(zhp); 485 return (NULL); 486 } 487 if (make_dataset_handle_common(zhp, &zc) == -1) { 488 free(zhp); 489 zhp = NULL; 490 } 491 zcmd_free_nvlists(&zc); 492 return (zhp); 493 } 494 495 static zfs_handle_t * 496 make_dataset_handle_zc(libzfs_handle_t *hdl, zfs_cmd_t *zc) 497 { 498 zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1); 499 500 if (zhp == NULL) 501 return (NULL); 502 503 zhp->zfs_hdl = hdl; 504 (void) strlcpy(zhp->zfs_name, zc->zc_name, sizeof (zhp->zfs_name)); 505 if (make_dataset_handle_common(zhp, zc) == -1) { 506 free(zhp); 507 return (NULL); 508 } 509 return (zhp); 510 } 511 512 /* 513 * Opens the given snapshot, filesystem, or volume. The 'types' 514 * argument is a mask of acceptable types. The function will print an 515 * appropriate error message and return NULL if it can't be opened. 516 */ 517 zfs_handle_t * 518 zfs_open(libzfs_handle_t *hdl, const char *path, int types) 519 { 520 zfs_handle_t *zhp; 521 char errbuf[1024]; 522 523 (void) snprintf(errbuf, sizeof (errbuf), 524 dgettext(TEXT_DOMAIN, "cannot open '%s'"), path); 525 526 /* 527 * Validate the name before we even try to open it. 528 */ 529 if (!zfs_validate_name(hdl, path, ZFS_TYPE_DATASET, B_FALSE)) { 530 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 531 "invalid dataset name")); 532 (void) zfs_error(hdl, EZFS_INVALIDNAME, errbuf); 533 return (NULL); 534 } 535 536 /* 537 * Try to get stats for the dataset, which will tell us if it exists. 538 */ 539 errno = 0; 540 if ((zhp = make_dataset_handle(hdl, path)) == NULL) { 541 (void) zfs_standard_error(hdl, errno, errbuf); 542 return (NULL); 543 } 544 545 if (!(types & zhp->zfs_type)) { 546 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf); 547 zfs_close(zhp); 548 return (NULL); 549 } 550 551 return (zhp); 552 } 553 554 /* 555 * Release a ZFS handle. Nothing to do but free the associated memory. 556 */ 557 void 558 zfs_close(zfs_handle_t *zhp) 559 { 560 if (zhp->zfs_mntopts) 561 free(zhp->zfs_mntopts); 562 nvlist_free(zhp->zfs_props); 563 nvlist_free(zhp->zfs_user_props); 564 nvlist_free(zhp->zfs_recvd_props); 565 free(zhp); 566 } 567 568 typedef struct mnttab_node { 569 struct mnttab mtn_mt; 570 avl_node_t mtn_node; 571 } mnttab_node_t; 572 573 static int 574 libzfs_mnttab_cache_compare(const void *arg1, const void *arg2) 575 { 576 const mnttab_node_t *mtn1 = arg1; 577 const mnttab_node_t *mtn2 = arg2; 578 int rv; 579 580 rv = strcmp(mtn1->mtn_mt.mnt_special, mtn2->mtn_mt.mnt_special); 581 582 if (rv == 0) 583 return (0); 584 return (rv > 0 ? 1 : -1); 585 } 586 587 void 588 libzfs_mnttab_init(libzfs_handle_t *hdl) 589 { 590 assert(avl_numnodes(&hdl->libzfs_mnttab_cache) == 0); 591 avl_create(&hdl->libzfs_mnttab_cache, libzfs_mnttab_cache_compare, 592 sizeof (mnttab_node_t), offsetof(mnttab_node_t, mtn_node)); 593 } 594 595 void 596 libzfs_mnttab_update(libzfs_handle_t *hdl) 597 { 598 struct mnttab entry; 599 600 rewind(hdl->libzfs_mnttab); 601 while (getmntent(hdl->libzfs_mnttab, &entry) == 0) { 602 mnttab_node_t *mtn; 603 604 if (strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0) 605 continue; 606 mtn = zfs_alloc(hdl, sizeof (mnttab_node_t)); 607 mtn->mtn_mt.mnt_special = zfs_strdup(hdl, entry.mnt_special); 608 mtn->mtn_mt.mnt_mountp = zfs_strdup(hdl, entry.mnt_mountp); 609 mtn->mtn_mt.mnt_fstype = zfs_strdup(hdl, entry.mnt_fstype); 610 mtn->mtn_mt.mnt_mntopts = zfs_strdup(hdl, entry.mnt_mntopts); 611 avl_add(&hdl->libzfs_mnttab_cache, mtn); 612 } 613 } 614 615 void 616 libzfs_mnttab_fini(libzfs_handle_t *hdl) 617 { 618 void *cookie = NULL; 619 mnttab_node_t *mtn; 620 621 while (mtn = avl_destroy_nodes(&hdl->libzfs_mnttab_cache, &cookie)) { 622 free(mtn->mtn_mt.mnt_special); 623 free(mtn->mtn_mt.mnt_mountp); 624 free(mtn->mtn_mt.mnt_fstype); 625 free(mtn->mtn_mt.mnt_mntopts); 626 free(mtn); 627 } 628 avl_destroy(&hdl->libzfs_mnttab_cache); 629 } 630 631 void 632 libzfs_mnttab_cache(libzfs_handle_t *hdl, boolean_t enable) 633 { 634 hdl->libzfs_mnttab_enable = enable; 635 } 636 637 int 638 libzfs_mnttab_find(libzfs_handle_t *hdl, const char *fsname, 639 struct mnttab *entry) 640 { 641 mnttab_node_t find; 642 mnttab_node_t *mtn; 643 644 if (!hdl->libzfs_mnttab_enable) { 645 struct mnttab srch = { 0 }; 646 647 if (avl_numnodes(&hdl->libzfs_mnttab_cache)) 648 libzfs_mnttab_fini(hdl); 649 rewind(hdl->libzfs_mnttab); 650 srch.mnt_special = (char *)fsname; 651 srch.mnt_fstype = MNTTYPE_ZFS; 652 if (getmntany(hdl->libzfs_mnttab, entry, &srch) == 0) 653 return (0); 654 else 655 return (ENOENT); 656 } 657 658 if (avl_numnodes(&hdl->libzfs_mnttab_cache) == 0) 659 libzfs_mnttab_update(hdl); 660 661 find.mtn_mt.mnt_special = (char *)fsname; 662 mtn = avl_find(&hdl->libzfs_mnttab_cache, &find, NULL); 663 if (mtn) { 664 *entry = mtn->mtn_mt; 665 return (0); 666 } 667 return (ENOENT); 668 } 669 670 void 671 libzfs_mnttab_add(libzfs_handle_t *hdl, const char *special, 672 const char *mountp, const char *mntopts) 673 { 674 mnttab_node_t *mtn; 675 676 if (avl_numnodes(&hdl->libzfs_mnttab_cache) == 0) 677 return; 678 mtn = zfs_alloc(hdl, sizeof (mnttab_node_t)); 679 mtn->mtn_mt.mnt_special = zfs_strdup(hdl, special); 680 mtn->mtn_mt.mnt_mountp = zfs_strdup(hdl, mountp); 681 mtn->mtn_mt.mnt_fstype = zfs_strdup(hdl, MNTTYPE_ZFS); 682 mtn->mtn_mt.mnt_mntopts = zfs_strdup(hdl, mntopts); 683 avl_add(&hdl->libzfs_mnttab_cache, mtn); 684 } 685 686 void 687 libzfs_mnttab_remove(libzfs_handle_t *hdl, const char *fsname) 688 { 689 mnttab_node_t find; 690 mnttab_node_t *ret; 691 692 find.mtn_mt.mnt_special = (char *)fsname; 693 if (ret = avl_find(&hdl->libzfs_mnttab_cache, (void *)&find, NULL)) { 694 avl_remove(&hdl->libzfs_mnttab_cache, ret); 695 free(ret->mtn_mt.mnt_special); 696 free(ret->mtn_mt.mnt_mountp); 697 free(ret->mtn_mt.mnt_fstype); 698 free(ret->mtn_mt.mnt_mntopts); 699 free(ret); 700 } 701 } 702 703 int 704 zfs_spa_version(zfs_handle_t *zhp, int *spa_version) 705 { 706 zpool_handle_t *zpool_handle = zhp->zpool_hdl; 707 708 if (zpool_handle == NULL) 709 return (-1); 710 711 *spa_version = zpool_get_prop_int(zpool_handle, 712 ZPOOL_PROP_VERSION, NULL); 713 return (0); 714 } 715 716 /* 717 * The choice of reservation property depends on the SPA version. 718 */ 719 static int 720 zfs_which_resv_prop(zfs_handle_t *zhp, zfs_prop_t *resv_prop) 721 { 722 int spa_version; 723 724 if (zfs_spa_version(zhp, &spa_version) < 0) 725 return (-1); 726 727 if (spa_version >= SPA_VERSION_REFRESERVATION) 728 *resv_prop = ZFS_PROP_REFRESERVATION; 729 else 730 *resv_prop = ZFS_PROP_RESERVATION; 731 732 return (0); 733 } 734 735 /* 736 * Given an nvlist of properties to set, validates that they are correct, and 737 * parses any numeric properties (index, boolean, etc) if they are specified as 738 * strings. 739 */ 740 nvlist_t * 741 zfs_valid_proplist(libzfs_handle_t *hdl, zfs_type_t type, nvlist_t *nvl, 742 uint64_t zoned, zfs_handle_t *zhp, const char *errbuf) 743 { 744 nvpair_t *elem; 745 uint64_t intval; 746 char *strval; 747 zfs_prop_t prop; 748 nvlist_t *ret; 749 int chosen_normal = -1; 750 int chosen_utf = -1; 751 752 if (nvlist_alloc(&ret, NV_UNIQUE_NAME, 0) != 0) { 753 (void) no_memory(hdl); 754 return (NULL); 755 } 756 757 /* 758 * Make sure this property is valid and applies to this type. 759 */ 760 761 elem = NULL; 762 while ((elem = nvlist_next_nvpair(nvl, elem)) != NULL) { 763 const char *propname = nvpair_name(elem); 764 765 prop = zfs_name_to_prop(propname); 766 if (prop == ZPROP_INVAL && zfs_prop_user(propname)) { 767 /* 768 * This is a user property: make sure it's a 769 * string, and that it's less than ZAP_MAXNAMELEN. 770 */ 771 if (nvpair_type(elem) != DATA_TYPE_STRING) { 772 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 773 "'%s' must be a string"), propname); 774 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 775 goto error; 776 } 777 778 if (strlen(nvpair_name(elem)) >= ZAP_MAXNAMELEN) { 779 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 780 "property name '%s' is too long"), 781 propname); 782 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 783 goto error; 784 } 785 786 (void) nvpair_value_string(elem, &strval); 787 if (nvlist_add_string(ret, propname, strval) != 0) { 788 (void) no_memory(hdl); 789 goto error; 790 } 791 continue; 792 } 793 794 /* 795 * Currently, only user properties can be modified on 796 * snapshots. 797 */ 798 if (type == ZFS_TYPE_SNAPSHOT) { 799 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 800 "this property can not be modified for snapshots")); 801 (void) zfs_error(hdl, EZFS_PROPTYPE, errbuf); 802 goto error; 803 } 804 805 if (prop == ZPROP_INVAL && zfs_prop_userquota(propname)) { 806 zfs_userquota_prop_t uqtype; 807 char newpropname[128]; 808 char domain[128]; 809 uint64_t rid; 810 uint64_t valary[3]; 811 812 if (userquota_propname_decode(propname, zoned, 813 &uqtype, domain, sizeof (domain), &rid) != 0) { 814 zfs_error_aux(hdl, 815 dgettext(TEXT_DOMAIN, 816 "'%s' has an invalid user/group name"), 817 propname); 818 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 819 goto error; 820 } 821 822 if (uqtype != ZFS_PROP_USERQUOTA && 823 uqtype != ZFS_PROP_GROUPQUOTA) { 824 zfs_error_aux(hdl, 825 dgettext(TEXT_DOMAIN, "'%s' is readonly"), 826 propname); 827 (void) zfs_error(hdl, EZFS_PROPREADONLY, 828 errbuf); 829 goto error; 830 } 831 832 if (nvpair_type(elem) == DATA_TYPE_STRING) { 833 (void) nvpair_value_string(elem, &strval); 834 if (strcmp(strval, "none") == 0) { 835 intval = 0; 836 } else if (zfs_nicestrtonum(hdl, 837 strval, &intval) != 0) { 838 (void) zfs_error(hdl, 839 EZFS_BADPROP, errbuf); 840 goto error; 841 } 842 } else if (nvpair_type(elem) == 843 DATA_TYPE_UINT64) { 844 (void) nvpair_value_uint64(elem, &intval); 845 if (intval == 0) { 846 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 847 "use 'none' to disable " 848 "userquota/groupquota")); 849 goto error; 850 } 851 } else { 852 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 853 "'%s' must be a number"), propname); 854 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 855 goto error; 856 } 857 858 /* 859 * Encode the prop name as 860 * userquota@<hex-rid>-domain, to make it easy 861 * for the kernel to decode. 862 */ 863 (void) snprintf(newpropname, sizeof (newpropname), 864 "%s%llx-%s", zfs_userquota_prop_prefixes[uqtype], 865 (longlong_t)rid, domain); 866 valary[0] = uqtype; 867 valary[1] = rid; 868 valary[2] = intval; 869 if (nvlist_add_uint64_array(ret, newpropname, 870 valary, 3) != 0) { 871 (void) no_memory(hdl); 872 goto error; 873 } 874 continue; 875 } 876 877 if (prop == ZPROP_INVAL) { 878 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 879 "invalid property '%s'"), propname); 880 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 881 goto error; 882 } 883 884 if (!zfs_prop_valid_for_type(prop, type)) { 885 zfs_error_aux(hdl, 886 dgettext(TEXT_DOMAIN, "'%s' does not " 887 "apply to datasets of this type"), propname); 888 (void) zfs_error(hdl, EZFS_PROPTYPE, errbuf); 889 goto error; 890 } 891 892 if (zfs_prop_readonly(prop) && 893 (!zfs_prop_setonce(prop) || zhp != NULL)) { 894 zfs_error_aux(hdl, 895 dgettext(TEXT_DOMAIN, "'%s' is readonly"), 896 propname); 897 (void) zfs_error(hdl, EZFS_PROPREADONLY, errbuf); 898 goto error; 899 } 900 901 if (zprop_parse_value(hdl, elem, prop, type, ret, 902 &strval, &intval, errbuf) != 0) 903 goto error; 904 905 /* 906 * Perform some additional checks for specific properties. 907 */ 908 switch (prop) { 909 case ZFS_PROP_VERSION: 910 { 911 int version; 912 913 if (zhp == NULL) 914 break; 915 version = zfs_prop_get_int(zhp, ZFS_PROP_VERSION); 916 if (intval < version) { 917 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 918 "Can not downgrade; already at version %u"), 919 version); 920 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 921 goto error; 922 } 923 break; 924 } 925 926 case ZFS_PROP_RECORDSIZE: 927 case ZFS_PROP_VOLBLOCKSIZE: 928 /* must be power of two within SPA_{MIN,MAX}BLOCKSIZE */ 929 if (intval < SPA_MINBLOCKSIZE || 930 intval > SPA_MAXBLOCKSIZE || !ISP2(intval)) { 931 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 932 "'%s' must be power of 2 from %u " 933 "to %uk"), propname, 934 (uint_t)SPA_MINBLOCKSIZE, 935 (uint_t)SPA_MAXBLOCKSIZE >> 10); 936 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 937 goto error; 938 } 939 break; 940 941 case ZFS_PROP_SHAREISCSI: 942 if (strcmp(strval, "off") != 0 && 943 strcmp(strval, "on") != 0 && 944 strcmp(strval, "type=disk") != 0) { 945 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 946 "'%s' must be 'on', 'off', or 'type=disk'"), 947 propname); 948 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 949 goto error; 950 } 951 952 break; 953 954 case ZFS_PROP_MLSLABEL: 955 { 956 /* 957 * Verify the mlslabel string and convert to 958 * internal hex label string. 959 */ 960 961 m_label_t *new_sl; 962 char *hex = NULL; /* internal label string */ 963 964 /* Default value is already OK. */ 965 if (strcasecmp(strval, ZFS_MLSLABEL_DEFAULT) == 0) 966 break; 967 968 /* Verify the label can be converted to binary form */ 969 if (((new_sl = m_label_alloc(MAC_LABEL)) == NULL) || 970 (str_to_label(strval, &new_sl, MAC_LABEL, 971 L_NO_CORRECTION, NULL) == -1)) { 972 goto badlabel; 973 } 974 975 /* Now translate to hex internal label string */ 976 if (label_to_str(new_sl, &hex, M_INTERNAL, 977 DEF_NAMES) != 0) { 978 if (hex) 979 free(hex); 980 goto badlabel; 981 } 982 m_label_free(new_sl); 983 984 /* If string is already in internal form, we're done. */ 985 if (strcmp(strval, hex) == 0) { 986 free(hex); 987 break; 988 } 989 990 /* Replace the label string with the internal form. */ 991 (void) nvlist_remove(ret, zfs_prop_to_name(prop), 992 DATA_TYPE_STRING); 993 verify(nvlist_add_string(ret, zfs_prop_to_name(prop), 994 hex) == 0); 995 free(hex); 996 997 break; 998 999 badlabel: 1000 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1001 "invalid mlslabel '%s'"), strval); 1002 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1003 m_label_free(new_sl); /* OK if null */ 1004 goto error; 1005 1006 } 1007 1008 case ZFS_PROP_MOUNTPOINT: 1009 { 1010 namecheck_err_t why; 1011 1012 if (strcmp(strval, ZFS_MOUNTPOINT_NONE) == 0 || 1013 strcmp(strval, ZFS_MOUNTPOINT_LEGACY) == 0) 1014 break; 1015 1016 if (mountpoint_namecheck(strval, &why)) { 1017 switch (why) { 1018 case NAME_ERR_LEADING_SLASH: 1019 zfs_error_aux(hdl, 1020 dgettext(TEXT_DOMAIN, 1021 "'%s' must be an absolute path, " 1022 "'none', or 'legacy'"), propname); 1023 break; 1024 case NAME_ERR_TOOLONG: 1025 zfs_error_aux(hdl, 1026 dgettext(TEXT_DOMAIN, 1027 "component of '%s' is too long"), 1028 propname); 1029 break; 1030 } 1031 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1032 goto error; 1033 } 1034 } 1035 1036 /*FALLTHRU*/ 1037 1038 case ZFS_PROP_SHARESMB: 1039 case ZFS_PROP_SHARENFS: 1040 /* 1041 * For the mountpoint and sharenfs or sharesmb 1042 * properties, check if it can be set in a 1043 * global/non-global zone based on 1044 * the zoned property value: 1045 * 1046 * global zone non-global zone 1047 * -------------------------------------------------- 1048 * zoned=on mountpoint (no) mountpoint (yes) 1049 * sharenfs (no) sharenfs (no) 1050 * sharesmb (no) sharesmb (no) 1051 * 1052 * zoned=off mountpoint (yes) N/A 1053 * sharenfs (yes) 1054 * sharesmb (yes) 1055 */ 1056 if (zoned) { 1057 if (getzoneid() == GLOBAL_ZONEID) { 1058 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1059 "'%s' cannot be set on " 1060 "dataset in a non-global zone"), 1061 propname); 1062 (void) zfs_error(hdl, EZFS_ZONED, 1063 errbuf); 1064 goto error; 1065 } else if (prop == ZFS_PROP_SHARENFS || 1066 prop == ZFS_PROP_SHARESMB) { 1067 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1068 "'%s' cannot be set in " 1069 "a non-global zone"), propname); 1070 (void) zfs_error(hdl, EZFS_ZONED, 1071 errbuf); 1072 goto error; 1073 } 1074 } else if (getzoneid() != GLOBAL_ZONEID) { 1075 /* 1076 * If zoned property is 'off', this must be in 1077 * a global zone. If not, something is wrong. 1078 */ 1079 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1080 "'%s' cannot be set while dataset " 1081 "'zoned' property is set"), propname); 1082 (void) zfs_error(hdl, EZFS_ZONED, errbuf); 1083 goto error; 1084 } 1085 1086 /* 1087 * At this point, it is legitimate to set the 1088 * property. Now we want to make sure that the 1089 * property value is valid if it is sharenfs. 1090 */ 1091 if ((prop == ZFS_PROP_SHARENFS || 1092 prop == ZFS_PROP_SHARESMB) && 1093 strcmp(strval, "on") != 0 && 1094 strcmp(strval, "off") != 0) { 1095 zfs_share_proto_t proto; 1096 1097 if (prop == ZFS_PROP_SHARESMB) 1098 proto = PROTO_SMB; 1099 else 1100 proto = PROTO_NFS; 1101 1102 /* 1103 * Must be an valid sharing protocol 1104 * option string so init the libshare 1105 * in order to enable the parser and 1106 * then parse the options. We use the 1107 * control API since we don't care about 1108 * the current configuration and don't 1109 * want the overhead of loading it 1110 * until we actually do something. 1111 */ 1112 1113 if (zfs_init_libshare(hdl, 1114 SA_INIT_CONTROL_API) != SA_OK) { 1115 /* 1116 * An error occurred so we can't do 1117 * anything 1118 */ 1119 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1120 "'%s' cannot be set: problem " 1121 "in share initialization"), 1122 propname); 1123 (void) zfs_error(hdl, EZFS_BADPROP, 1124 errbuf); 1125 goto error; 1126 } 1127 1128 if (zfs_parse_options(strval, proto) != SA_OK) { 1129 /* 1130 * There was an error in parsing so 1131 * deal with it by issuing an error 1132 * message and leaving after 1133 * uninitializing the the libshare 1134 * interface. 1135 */ 1136 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1137 "'%s' cannot be set to invalid " 1138 "options"), propname); 1139 (void) zfs_error(hdl, EZFS_BADPROP, 1140 errbuf); 1141 zfs_uninit_libshare(hdl); 1142 goto error; 1143 } 1144 zfs_uninit_libshare(hdl); 1145 } 1146 1147 break; 1148 case ZFS_PROP_UTF8ONLY: 1149 chosen_utf = (int)intval; 1150 break; 1151 case ZFS_PROP_NORMALIZE: 1152 chosen_normal = (int)intval; 1153 break; 1154 } 1155 1156 /* 1157 * For changes to existing volumes, we have some additional 1158 * checks to enforce. 1159 */ 1160 if (type == ZFS_TYPE_VOLUME && zhp != NULL) { 1161 uint64_t volsize = zfs_prop_get_int(zhp, 1162 ZFS_PROP_VOLSIZE); 1163 uint64_t blocksize = zfs_prop_get_int(zhp, 1164 ZFS_PROP_VOLBLOCKSIZE); 1165 char buf[64]; 1166 1167 switch (prop) { 1168 case ZFS_PROP_RESERVATION: 1169 case ZFS_PROP_REFRESERVATION: 1170 if (intval > volsize) { 1171 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1172 "'%s' is greater than current " 1173 "volume size"), propname); 1174 (void) zfs_error(hdl, EZFS_BADPROP, 1175 errbuf); 1176 goto error; 1177 } 1178 break; 1179 1180 case ZFS_PROP_VOLSIZE: 1181 if (intval % blocksize != 0) { 1182 zfs_nicenum(blocksize, buf, 1183 sizeof (buf)); 1184 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1185 "'%s' must be a multiple of " 1186 "volume block size (%s)"), 1187 propname, buf); 1188 (void) zfs_error(hdl, EZFS_BADPROP, 1189 errbuf); 1190 goto error; 1191 } 1192 1193 if (intval == 0) { 1194 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1195 "'%s' cannot be zero"), 1196 propname); 1197 (void) zfs_error(hdl, EZFS_BADPROP, 1198 errbuf); 1199 goto error; 1200 } 1201 break; 1202 } 1203 } 1204 } 1205 1206 /* 1207 * If normalization was chosen, but no UTF8 choice was made, 1208 * enforce rejection of non-UTF8 names. 1209 * 1210 * If normalization was chosen, but rejecting non-UTF8 names 1211 * was explicitly not chosen, it is an error. 1212 */ 1213 if (chosen_normal > 0 && chosen_utf < 0) { 1214 if (nvlist_add_uint64(ret, 1215 zfs_prop_to_name(ZFS_PROP_UTF8ONLY), 1) != 0) { 1216 (void) no_memory(hdl); 1217 goto error; 1218 } 1219 } else if (chosen_normal > 0 && chosen_utf == 0) { 1220 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1221 "'%s' must be set 'on' if normalization chosen"), 1222 zfs_prop_to_name(ZFS_PROP_UTF8ONLY)); 1223 (void) zfs_error(hdl, EZFS_BADPROP, errbuf); 1224 goto error; 1225 } 1226 1227 /* 1228 * If this is an existing volume, and someone is setting the volsize, 1229 * make sure that it matches the reservation, or add it if necessary. 1230 */ 1231 if (zhp != NULL && type == ZFS_TYPE_VOLUME && 1232 nvlist_lookup_uint64(ret, zfs_prop_to_name(ZFS_PROP_VOLSIZE), 1233 &intval) == 0) { 1234 uint64_t old_volsize = zfs_prop_get_int(zhp, 1235 ZFS_PROP_VOLSIZE); 1236 uint64_t old_reservation; 1237 uint64_t new_reservation; 1238 zfs_prop_t resv_prop; 1239 1240 if (zfs_which_resv_prop(zhp, &resv_prop) < 0) 1241 goto error; 1242 old_reservation = zfs_prop_get_int(zhp, resv_prop); 1243 1244 if (old_volsize == old_reservation && 1245 nvlist_lookup_uint64(ret, zfs_prop_to_name(resv_prop), 1246 &new_reservation) != 0) { 1247 if (nvlist_add_uint64(ret, 1248 zfs_prop_to_name(resv_prop), intval) != 0) { 1249 (void) no_memory(hdl); 1250 goto error; 1251 } 1252 } 1253 } 1254 return (ret); 1255 1256 error: 1257 nvlist_free(ret); 1258 return (NULL); 1259 } 1260 1261 void 1262 zfs_setprop_error(libzfs_handle_t *hdl, zfs_prop_t prop, int err, 1263 char *errbuf) 1264 { 1265 switch (err) { 1266 1267 case ENOSPC: 1268 /* 1269 * For quotas and reservations, ENOSPC indicates 1270 * something different; setting a quota or reservation 1271 * doesn't use any disk space. 1272 */ 1273 switch (prop) { 1274 case ZFS_PROP_QUOTA: 1275 case ZFS_PROP_REFQUOTA: 1276 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1277 "size is less than current used or " 1278 "reserved space")); 1279 (void) zfs_error(hdl, EZFS_PROPSPACE, errbuf); 1280 break; 1281 1282 case ZFS_PROP_RESERVATION: 1283 case ZFS_PROP_REFRESERVATION: 1284 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1285 "size is greater than available space")); 1286 (void) zfs_error(hdl, EZFS_PROPSPACE, errbuf); 1287 break; 1288 1289 default: 1290 (void) zfs_standard_error(hdl, err, errbuf); 1291 break; 1292 } 1293 break; 1294 1295 case EBUSY: 1296 (void) zfs_standard_error(hdl, EBUSY, errbuf); 1297 break; 1298 1299 case EROFS: 1300 (void) zfs_error(hdl, EZFS_DSREADONLY, errbuf); 1301 break; 1302 1303 case ENOTSUP: 1304 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1305 "pool and or dataset must be upgraded to set this " 1306 "property or value")); 1307 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf); 1308 break; 1309 1310 case ERANGE: 1311 if (prop == ZFS_PROP_COMPRESSION) { 1312 (void) zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1313 "property setting is not allowed on " 1314 "bootable datasets")); 1315 (void) zfs_error(hdl, EZFS_NOTSUP, errbuf); 1316 } else { 1317 (void) zfs_standard_error(hdl, err, errbuf); 1318 } 1319 break; 1320 1321 case EOVERFLOW: 1322 /* 1323 * This platform can't address a volume this big. 1324 */ 1325 #ifdef _ILP32 1326 if (prop == ZFS_PROP_VOLSIZE) { 1327 (void) zfs_error(hdl, EZFS_VOLTOOBIG, errbuf); 1328 break; 1329 } 1330 #endif 1331 /* FALLTHROUGH */ 1332 default: 1333 (void) zfs_standard_error(hdl, err, errbuf); 1334 } 1335 } 1336 1337 /* 1338 * Given a property name and value, set the property for the given dataset. 1339 */ 1340 int 1341 zfs_prop_set(zfs_handle_t *zhp, const char *propname, const char *propval) 1342 { 1343 zfs_cmd_t zc = { 0 }; 1344 int ret = -1; 1345 prop_changelist_t *cl = NULL; 1346 char errbuf[1024]; 1347 libzfs_handle_t *hdl = zhp->zfs_hdl; 1348 nvlist_t *nvl = NULL, *realprops; 1349 zfs_prop_t prop; 1350 boolean_t do_prefix; 1351 uint64_t idx; 1352 1353 (void) snprintf(errbuf, sizeof (errbuf), 1354 dgettext(TEXT_DOMAIN, "cannot set property for '%s'"), 1355 zhp->zfs_name); 1356 1357 if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0 || 1358 nvlist_add_string(nvl, propname, propval) != 0) { 1359 (void) no_memory(hdl); 1360 goto error; 1361 } 1362 1363 if ((realprops = zfs_valid_proplist(hdl, zhp->zfs_type, nvl, 1364 zfs_prop_get_int(zhp, ZFS_PROP_ZONED), zhp, errbuf)) == NULL) 1365 goto error; 1366 1367 nvlist_free(nvl); 1368 nvl = realprops; 1369 1370 prop = zfs_name_to_prop(propname); 1371 1372 if ((cl = changelist_gather(zhp, prop, 0, 0)) == NULL) 1373 goto error; 1374 1375 if (prop == ZFS_PROP_MOUNTPOINT && changelist_haszonedchild(cl)) { 1376 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1377 "child dataset with inherited mountpoint is used " 1378 "in a non-global zone")); 1379 ret = zfs_error(hdl, EZFS_ZONED, errbuf); 1380 goto error; 1381 } 1382 1383 /* 1384 * If the dataset's canmount property is being set to noauto, 1385 * then we want to prevent unmounting & remounting it. 1386 */ 1387 do_prefix = !((prop == ZFS_PROP_CANMOUNT) && 1388 (zprop_string_to_index(prop, propval, &idx, 1389 ZFS_TYPE_DATASET) == 0) && (idx == ZFS_CANMOUNT_NOAUTO)); 1390 1391 if (do_prefix && (ret = changelist_prefix(cl)) != 0) 1392 goto error; 1393 1394 /* 1395 * Execute the corresponding ioctl() to set this property. 1396 */ 1397 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 1398 1399 if (zcmd_write_src_nvlist(hdl, &zc, nvl) != 0) 1400 goto error; 1401 1402 ret = zfs_ioctl(hdl, ZFS_IOC_SET_PROP, &zc); 1403 1404 if (ret != 0) { 1405 zfs_setprop_error(hdl, prop, errno, errbuf); 1406 } else { 1407 if (do_prefix) 1408 ret = changelist_postfix(cl); 1409 1410 /* 1411 * Refresh the statistics so the new property value 1412 * is reflected. 1413 */ 1414 if (ret == 0) 1415 (void) get_stats(zhp); 1416 } 1417 1418 error: 1419 nvlist_free(nvl); 1420 zcmd_free_nvlists(&zc); 1421 if (cl) 1422 changelist_free(cl); 1423 return (ret); 1424 } 1425 1426 /* 1427 * Given a property, inherit the value from the parent dataset, or if received 1428 * is TRUE, revert to the received value, if any. 1429 */ 1430 int 1431 zfs_prop_inherit(zfs_handle_t *zhp, const char *propname, boolean_t received) 1432 { 1433 zfs_cmd_t zc = { 0 }; 1434 int ret; 1435 prop_changelist_t *cl; 1436 libzfs_handle_t *hdl = zhp->zfs_hdl; 1437 char errbuf[1024]; 1438 zfs_prop_t prop; 1439 1440 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 1441 "cannot inherit %s for '%s'"), propname, zhp->zfs_name); 1442 1443 zc.zc_cookie = received; 1444 if ((prop = zfs_name_to_prop(propname)) == ZPROP_INVAL) { 1445 /* 1446 * For user properties, the amount of work we have to do is very 1447 * small, so just do it here. 1448 */ 1449 if (!zfs_prop_user(propname)) { 1450 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1451 "invalid property")); 1452 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 1453 } 1454 1455 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 1456 (void) strlcpy(zc.zc_value, propname, sizeof (zc.zc_value)); 1457 1458 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_INHERIT_PROP, &zc) != 0) 1459 return (zfs_standard_error(hdl, errno, errbuf)); 1460 1461 return (0); 1462 } 1463 1464 /* 1465 * Verify that this property is inheritable. 1466 */ 1467 if (zfs_prop_readonly(prop)) 1468 return (zfs_error(hdl, EZFS_PROPREADONLY, errbuf)); 1469 1470 if (!zfs_prop_inheritable(prop) && !received) 1471 return (zfs_error(hdl, EZFS_PROPNONINHERIT, errbuf)); 1472 1473 /* 1474 * Check to see if the value applies to this type 1475 */ 1476 if (!zfs_prop_valid_for_type(prop, zhp->zfs_type)) 1477 return (zfs_error(hdl, EZFS_PROPTYPE, errbuf)); 1478 1479 /* 1480 * Normalize the name, to get rid of shorthand abbrevations. 1481 */ 1482 propname = zfs_prop_to_name(prop); 1483 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 1484 (void) strlcpy(zc.zc_value, propname, sizeof (zc.zc_value)); 1485 1486 if (prop == ZFS_PROP_MOUNTPOINT && getzoneid() == GLOBAL_ZONEID && 1487 zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) { 1488 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1489 "dataset is used in a non-global zone")); 1490 return (zfs_error(hdl, EZFS_ZONED, errbuf)); 1491 } 1492 1493 /* 1494 * Determine datasets which will be affected by this change, if any. 1495 */ 1496 if ((cl = changelist_gather(zhp, prop, 0, 0)) == NULL) 1497 return (-1); 1498 1499 if (prop == ZFS_PROP_MOUNTPOINT && changelist_haszonedchild(cl)) { 1500 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 1501 "child dataset with inherited mountpoint is used " 1502 "in a non-global zone")); 1503 ret = zfs_error(hdl, EZFS_ZONED, errbuf); 1504 goto error; 1505 } 1506 1507 if ((ret = changelist_prefix(cl)) != 0) 1508 goto error; 1509 1510 if ((ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_INHERIT_PROP, &zc)) != 0) { 1511 return (zfs_standard_error(hdl, errno, errbuf)); 1512 } else { 1513 1514 if ((ret = changelist_postfix(cl)) != 0) 1515 goto error; 1516 1517 /* 1518 * Refresh the statistics so the new property is reflected. 1519 */ 1520 (void) get_stats(zhp); 1521 } 1522 1523 error: 1524 changelist_free(cl); 1525 return (ret); 1526 } 1527 1528 /* 1529 * True DSL properties are stored in an nvlist. The following two functions 1530 * extract them appropriately. 1531 */ 1532 static uint64_t 1533 getprop_uint64(zfs_handle_t *zhp, zfs_prop_t prop, char **source) 1534 { 1535 nvlist_t *nv; 1536 uint64_t value; 1537 1538 *source = NULL; 1539 if (nvlist_lookup_nvlist(zhp->zfs_props, 1540 zfs_prop_to_name(prop), &nv) == 0) { 1541 verify(nvlist_lookup_uint64(nv, ZPROP_VALUE, &value) == 0); 1542 (void) nvlist_lookup_string(nv, ZPROP_SOURCE, source); 1543 } else { 1544 verify(!zhp->zfs_props_table || 1545 zhp->zfs_props_table[prop] == B_TRUE); 1546 value = zfs_prop_default_numeric(prop); 1547 *source = ""; 1548 } 1549 1550 return (value); 1551 } 1552 1553 static char * 1554 getprop_string(zfs_handle_t *zhp, zfs_prop_t prop, char **source) 1555 { 1556 nvlist_t *nv; 1557 char *value; 1558 1559 *source = NULL; 1560 if (nvlist_lookup_nvlist(zhp->zfs_props, 1561 zfs_prop_to_name(prop), &nv) == 0) { 1562 verify(nvlist_lookup_string(nv, ZPROP_VALUE, &value) == 0); 1563 (void) nvlist_lookup_string(nv, ZPROP_SOURCE, source); 1564 } else { 1565 verify(!zhp->zfs_props_table || 1566 zhp->zfs_props_table[prop] == B_TRUE); 1567 if ((value = (char *)zfs_prop_default_string(prop)) == NULL) 1568 value = ""; 1569 *source = ""; 1570 } 1571 1572 return (value); 1573 } 1574 1575 static boolean_t 1576 zfs_is_recvd_props_mode(zfs_handle_t *zhp) 1577 { 1578 return (zhp->zfs_props == zhp->zfs_recvd_props); 1579 } 1580 1581 static void 1582 zfs_set_recvd_props_mode(zfs_handle_t *zhp, uint64_t *cookie) 1583 { 1584 *cookie = (uint64_t)(uintptr_t)zhp->zfs_props; 1585 zhp->zfs_props = zhp->zfs_recvd_props; 1586 } 1587 1588 static void 1589 zfs_unset_recvd_props_mode(zfs_handle_t *zhp, uint64_t *cookie) 1590 { 1591 zhp->zfs_props = (nvlist_t *)(uintptr_t)*cookie; 1592 *cookie = 0; 1593 } 1594 1595 /* 1596 * Internal function for getting a numeric property. Both zfs_prop_get() and 1597 * zfs_prop_get_int() are built using this interface. 1598 * 1599 * Certain properties can be overridden using 'mount -o'. In this case, scan 1600 * the contents of the /etc/mnttab entry, searching for the appropriate options. 1601 * If they differ from the on-disk values, report the current values and mark 1602 * the source "temporary". 1603 */ 1604 static int 1605 get_numeric_property(zfs_handle_t *zhp, zfs_prop_t prop, zprop_source_t *src, 1606 char **source, uint64_t *val) 1607 { 1608 zfs_cmd_t zc = { 0 }; 1609 nvlist_t *zplprops = NULL; 1610 struct mnttab mnt; 1611 char *mntopt_on = NULL; 1612 char *mntopt_off = NULL; 1613 boolean_t received = zfs_is_recvd_props_mode(zhp); 1614 1615 *source = NULL; 1616 1617 switch (prop) { 1618 case ZFS_PROP_ATIME: 1619 mntopt_on = MNTOPT_ATIME; 1620 mntopt_off = MNTOPT_NOATIME; 1621 break; 1622 1623 case ZFS_PROP_DEVICES: 1624 mntopt_on = MNTOPT_DEVICES; 1625 mntopt_off = MNTOPT_NODEVICES; 1626 break; 1627 1628 case ZFS_PROP_EXEC: 1629 mntopt_on = MNTOPT_EXEC; 1630 mntopt_off = MNTOPT_NOEXEC; 1631 break; 1632 1633 case ZFS_PROP_READONLY: 1634 mntopt_on = MNTOPT_RO; 1635 mntopt_off = MNTOPT_RW; 1636 break; 1637 1638 case ZFS_PROP_SETUID: 1639 mntopt_on = MNTOPT_SETUID; 1640 mntopt_off = MNTOPT_NOSETUID; 1641 break; 1642 1643 case ZFS_PROP_XATTR: 1644 mntopt_on = MNTOPT_XATTR; 1645 mntopt_off = MNTOPT_NOXATTR; 1646 break; 1647 1648 case ZFS_PROP_NBMAND: 1649 mntopt_on = MNTOPT_NBMAND; 1650 mntopt_off = MNTOPT_NONBMAND; 1651 break; 1652 } 1653 1654 /* 1655 * Because looking up the mount options is potentially expensive 1656 * (iterating over all of /etc/mnttab), we defer its calculation until 1657 * we're looking up a property which requires its presence. 1658 */ 1659 if (!zhp->zfs_mntcheck && 1660 (mntopt_on != NULL || prop == ZFS_PROP_MOUNTED)) { 1661 libzfs_handle_t *hdl = zhp->zfs_hdl; 1662 struct mnttab entry; 1663 1664 if (libzfs_mnttab_find(hdl, zhp->zfs_name, &entry) == 0) { 1665 zhp->zfs_mntopts = zfs_strdup(hdl, 1666 entry.mnt_mntopts); 1667 if (zhp->zfs_mntopts == NULL) 1668 return (-1); 1669 } 1670 1671 zhp->zfs_mntcheck = B_TRUE; 1672 } 1673 1674 if (zhp->zfs_mntopts == NULL) 1675 mnt.mnt_mntopts = ""; 1676 else 1677 mnt.mnt_mntopts = zhp->zfs_mntopts; 1678 1679 switch (prop) { 1680 case ZFS_PROP_ATIME: 1681 case ZFS_PROP_DEVICES: 1682 case ZFS_PROP_EXEC: 1683 case ZFS_PROP_READONLY: 1684 case ZFS_PROP_SETUID: 1685 case ZFS_PROP_XATTR: 1686 case ZFS_PROP_NBMAND: 1687 *val = getprop_uint64(zhp, prop, source); 1688 1689 if (received) 1690 break; 1691 1692 if (hasmntopt(&mnt, mntopt_on) && !*val) { 1693 *val = B_TRUE; 1694 if (src) 1695 *src = ZPROP_SRC_TEMPORARY; 1696 } else if (hasmntopt(&mnt, mntopt_off) && *val) { 1697 *val = B_FALSE; 1698 if (src) 1699 *src = ZPROP_SRC_TEMPORARY; 1700 } 1701 break; 1702 1703 case ZFS_PROP_CANMOUNT: 1704 case ZFS_PROP_VOLSIZE: 1705 case ZFS_PROP_QUOTA: 1706 case ZFS_PROP_REFQUOTA: 1707 case ZFS_PROP_RESERVATION: 1708 case ZFS_PROP_REFRESERVATION: 1709 *val = getprop_uint64(zhp, prop, source); 1710 1711 if (*source == NULL) { 1712 /* not default, must be local */ 1713 *source = zhp->zfs_name; 1714 } 1715 break; 1716 1717 case ZFS_PROP_MOUNTED: 1718 *val = (zhp->zfs_mntopts != NULL); 1719 break; 1720 1721 case ZFS_PROP_NUMCLONES: 1722 *val = zhp->zfs_dmustats.dds_num_clones; 1723 break; 1724 1725 case ZFS_PROP_VERSION: 1726 case ZFS_PROP_NORMALIZE: 1727 case ZFS_PROP_UTF8ONLY: 1728 case ZFS_PROP_CASE: 1729 if (!zfs_prop_valid_for_type(prop, zhp->zfs_head_type) || 1730 zcmd_alloc_dst_nvlist(zhp->zfs_hdl, &zc, 0) != 0) 1731 return (-1); 1732 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 1733 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_OBJSET_ZPLPROPS, &zc)) { 1734 zcmd_free_nvlists(&zc); 1735 return (-1); 1736 } 1737 if (zcmd_read_dst_nvlist(zhp->zfs_hdl, &zc, &zplprops) != 0 || 1738 nvlist_lookup_uint64(zplprops, zfs_prop_to_name(prop), 1739 val) != 0) { 1740 zcmd_free_nvlists(&zc); 1741 return (-1); 1742 } 1743 if (zplprops) 1744 nvlist_free(zplprops); 1745 zcmd_free_nvlists(&zc); 1746 break; 1747 1748 default: 1749 switch (zfs_prop_get_type(prop)) { 1750 case PROP_TYPE_NUMBER: 1751 case PROP_TYPE_INDEX: 1752 *val = getprop_uint64(zhp, prop, source); 1753 /* 1754 * If we tried to use a default value for a 1755 * readonly property, it means that it was not 1756 * present. 1757 */ 1758 if (zfs_prop_readonly(prop) && 1759 *source != NULL && (*source)[0] == '\0') { 1760 *source = NULL; 1761 } 1762 break; 1763 1764 case PROP_TYPE_STRING: 1765 default: 1766 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN, 1767 "cannot get non-numeric property")); 1768 return (zfs_error(zhp->zfs_hdl, EZFS_BADPROP, 1769 dgettext(TEXT_DOMAIN, "internal error"))); 1770 } 1771 } 1772 1773 return (0); 1774 } 1775 1776 /* 1777 * Calculate the source type, given the raw source string. 1778 */ 1779 static void 1780 get_source(zfs_handle_t *zhp, zprop_source_t *srctype, char *source, 1781 char *statbuf, size_t statlen) 1782 { 1783 if (statbuf == NULL || *srctype == ZPROP_SRC_TEMPORARY) 1784 return; 1785 1786 if (source == NULL) { 1787 *srctype = ZPROP_SRC_NONE; 1788 } else if (source[0] == '\0') { 1789 *srctype = ZPROP_SRC_DEFAULT; 1790 } else if (strstr(source, ZPROP_SOURCE_VAL_RECVD) != NULL) { 1791 *srctype = ZPROP_SRC_RECEIVED; 1792 } else { 1793 if (strcmp(source, zhp->zfs_name) == 0) { 1794 *srctype = ZPROP_SRC_LOCAL; 1795 } else { 1796 (void) strlcpy(statbuf, source, statlen); 1797 *srctype = ZPROP_SRC_INHERITED; 1798 } 1799 } 1800 1801 } 1802 1803 int 1804 zfs_prop_get_recvd(zfs_handle_t *zhp, const char *propname, char *propbuf, 1805 size_t proplen, boolean_t literal) 1806 { 1807 zfs_prop_t prop; 1808 int err = 0; 1809 1810 if (zhp->zfs_recvd_props == NULL) 1811 if (get_recvd_props_ioctl(zhp) != 0) 1812 return (-1); 1813 1814 prop = zfs_name_to_prop(propname); 1815 1816 if (prop != ZPROP_INVAL) { 1817 uint64_t cookie; 1818 if (!nvlist_exists(zhp->zfs_recvd_props, propname)) 1819 return (-1); 1820 zfs_set_recvd_props_mode(zhp, &cookie); 1821 err = zfs_prop_get(zhp, prop, propbuf, proplen, 1822 NULL, NULL, 0, literal); 1823 zfs_unset_recvd_props_mode(zhp, &cookie); 1824 } else if (zfs_prop_userquota(propname)) { 1825 return (-1); 1826 } else { 1827 nvlist_t *propval; 1828 char *recvdval; 1829 if (nvlist_lookup_nvlist(zhp->zfs_recvd_props, 1830 propname, &propval) != 0) 1831 return (-1); 1832 verify(nvlist_lookup_string(propval, ZPROP_VALUE, 1833 &recvdval) == 0); 1834 (void) strlcpy(propbuf, recvdval, proplen); 1835 } 1836 1837 return (err == 0 ? 0 : -1); 1838 } 1839 1840 /* 1841 * Retrieve a property from the given object. If 'literal' is specified, then 1842 * numbers are left as exact values. Otherwise, numbers are converted to a 1843 * human-readable form. 1844 * 1845 * Returns 0 on success, or -1 on error. 1846 */ 1847 int 1848 zfs_prop_get(zfs_handle_t *zhp, zfs_prop_t prop, char *propbuf, size_t proplen, 1849 zprop_source_t *src, char *statbuf, size_t statlen, boolean_t literal) 1850 { 1851 char *source = NULL; 1852 uint64_t val; 1853 char *str; 1854 const char *strval; 1855 boolean_t received = zfs_is_recvd_props_mode(zhp); 1856 1857 /* 1858 * Check to see if this property applies to our object 1859 */ 1860 if (!zfs_prop_valid_for_type(prop, zhp->zfs_type)) 1861 return (-1); 1862 1863 if (received && zfs_prop_readonly(prop)) 1864 return (-1); 1865 1866 if (src) 1867 *src = ZPROP_SRC_NONE; 1868 1869 switch (prop) { 1870 case ZFS_PROP_CREATION: 1871 /* 1872 * 'creation' is a time_t stored in the statistics. We convert 1873 * this into a string unless 'literal' is specified. 1874 */ 1875 { 1876 val = getprop_uint64(zhp, prop, &source); 1877 time_t time = (time_t)val; 1878 struct tm t; 1879 1880 if (literal || 1881 localtime_r(&time, &t) == NULL || 1882 strftime(propbuf, proplen, "%a %b %e %k:%M %Y", 1883 &t) == 0) 1884 (void) snprintf(propbuf, proplen, "%llu", val); 1885 } 1886 break; 1887 1888 case ZFS_PROP_MOUNTPOINT: 1889 /* 1890 * Getting the precise mountpoint can be tricky. 1891 * 1892 * - for 'none' or 'legacy', return those values. 1893 * - for inherited mountpoints, we want to take everything 1894 * after our ancestor and append it to the inherited value. 1895 * 1896 * If the pool has an alternate root, we want to prepend that 1897 * root to any values we return. 1898 */ 1899 1900 str = getprop_string(zhp, prop, &source); 1901 1902 if (str[0] == '/') { 1903 char buf[MAXPATHLEN]; 1904 char *root = buf; 1905 const char *relpath; 1906 1907 /* 1908 * If we inherit the mountpoint, even from a dataset 1909 * with a received value, the source will be the path of 1910 * the dataset we inherit from. If source is 1911 * ZPROP_SOURCE_VAL_RECVD, the received value is not 1912 * inherited. 1913 */ 1914 if (strcmp(source, ZPROP_SOURCE_VAL_RECVD) == 0) { 1915 relpath = ""; 1916 } else { 1917 relpath = zhp->zfs_name + strlen(source); 1918 if (relpath[0] == '/') 1919 relpath++; 1920 } 1921 1922 if ((zpool_get_prop(zhp->zpool_hdl, 1923 ZPOOL_PROP_ALTROOT, buf, MAXPATHLEN, NULL)) || 1924 (strcmp(root, "-") == 0)) 1925 root[0] = '\0'; 1926 /* 1927 * Special case an alternate root of '/'. This will 1928 * avoid having multiple leading slashes in the 1929 * mountpoint path. 1930 */ 1931 if (strcmp(root, "/") == 0) 1932 root++; 1933 1934 /* 1935 * If the mountpoint is '/' then skip over this 1936 * if we are obtaining either an alternate root or 1937 * an inherited mountpoint. 1938 */ 1939 if (str[1] == '\0' && (root[0] != '\0' || 1940 relpath[0] != '\0')) 1941 str++; 1942 1943 if (relpath[0] == '\0') 1944 (void) snprintf(propbuf, proplen, "%s%s", 1945 root, str); 1946 else 1947 (void) snprintf(propbuf, proplen, "%s%s%s%s", 1948 root, str, relpath[0] == '@' ? "" : "/", 1949 relpath); 1950 } else { 1951 /* 'legacy' or 'none' */ 1952 (void) strlcpy(propbuf, str, proplen); 1953 } 1954 1955 break; 1956 1957 case ZFS_PROP_ORIGIN: 1958 (void) strlcpy(propbuf, getprop_string(zhp, prop, &source), 1959 proplen); 1960 /* 1961 * If there is no parent at all, return failure to indicate that 1962 * it doesn't apply to this dataset. 1963 */ 1964 if (propbuf[0] == '\0') 1965 return (-1); 1966 break; 1967 1968 case ZFS_PROP_QUOTA: 1969 case ZFS_PROP_REFQUOTA: 1970 case ZFS_PROP_RESERVATION: 1971 case ZFS_PROP_REFRESERVATION: 1972 1973 if (get_numeric_property(zhp, prop, src, &source, &val) != 0) 1974 return (-1); 1975 1976 /* 1977 * If quota or reservation is 0, we translate this into 'none' 1978 * (unless literal is set), and indicate that it's the default 1979 * value. Otherwise, we print the number nicely and indicate 1980 * that its set locally. 1981 */ 1982 if (val == 0) { 1983 if (literal) 1984 (void) strlcpy(propbuf, "0", proplen); 1985 else 1986 (void) strlcpy(propbuf, "none", proplen); 1987 } else { 1988 if (literal) 1989 (void) snprintf(propbuf, proplen, "%llu", 1990 (u_longlong_t)val); 1991 else 1992 zfs_nicenum(val, propbuf, proplen); 1993 } 1994 break; 1995 1996 case ZFS_PROP_COMPRESSRATIO: 1997 if (get_numeric_property(zhp, prop, src, &source, &val) != 0) 1998 return (-1); 1999 (void) snprintf(propbuf, proplen, "%llu.%02llux", 2000 (u_longlong_t)(val / 100), 2001 (u_longlong_t)(val % 100)); 2002 break; 2003 2004 case ZFS_PROP_TYPE: 2005 switch (zhp->zfs_type) { 2006 case ZFS_TYPE_FILESYSTEM: 2007 str = "filesystem"; 2008 break; 2009 case ZFS_TYPE_VOLUME: 2010 str = "volume"; 2011 break; 2012 case ZFS_TYPE_SNAPSHOT: 2013 str = "snapshot"; 2014 break; 2015 default: 2016 abort(); 2017 } 2018 (void) snprintf(propbuf, proplen, "%s", str); 2019 break; 2020 2021 case ZFS_PROP_MOUNTED: 2022 /* 2023 * The 'mounted' property is a pseudo-property that described 2024 * whether the filesystem is currently mounted. Even though 2025 * it's a boolean value, the typical values of "on" and "off" 2026 * don't make sense, so we translate to "yes" and "no". 2027 */ 2028 if (get_numeric_property(zhp, ZFS_PROP_MOUNTED, 2029 src, &source, &val) != 0) 2030 return (-1); 2031 if (val) 2032 (void) strlcpy(propbuf, "yes", proplen); 2033 else 2034 (void) strlcpy(propbuf, "no", proplen); 2035 break; 2036 2037 case ZFS_PROP_NAME: 2038 /* 2039 * The 'name' property is a pseudo-property derived from the 2040 * dataset name. It is presented as a real property to simplify 2041 * consumers. 2042 */ 2043 (void) strlcpy(propbuf, zhp->zfs_name, proplen); 2044 break; 2045 2046 case ZFS_PROP_MLSLABEL: 2047 { 2048 m_label_t *new_sl = NULL; 2049 char *ascii = NULL; /* human readable label */ 2050 2051 (void) strlcpy(propbuf, 2052 getprop_string(zhp, prop, &source), proplen); 2053 2054 if (literal || (strcasecmp(propbuf, 2055 ZFS_MLSLABEL_DEFAULT) == 0)) 2056 break; 2057 2058 /* 2059 * Try to translate the internal hex string to 2060 * human-readable output. If there are any 2061 * problems just use the hex string. 2062 */ 2063 2064 if (str_to_label(propbuf, &new_sl, MAC_LABEL, 2065 L_NO_CORRECTION, NULL) == -1) { 2066 m_label_free(new_sl); 2067 break; 2068 } 2069 2070 if (label_to_str(new_sl, &ascii, M_LABEL, 2071 DEF_NAMES) != 0) { 2072 if (ascii) 2073 free(ascii); 2074 m_label_free(new_sl); 2075 break; 2076 } 2077 m_label_free(new_sl); 2078 2079 (void) strlcpy(propbuf, ascii, proplen); 2080 free(ascii); 2081 } 2082 break; 2083 2084 default: 2085 switch (zfs_prop_get_type(prop)) { 2086 case PROP_TYPE_NUMBER: 2087 if (get_numeric_property(zhp, prop, src, 2088 &source, &val) != 0) 2089 return (-1); 2090 if (literal) 2091 (void) snprintf(propbuf, proplen, "%llu", 2092 (u_longlong_t)val); 2093 else 2094 zfs_nicenum(val, propbuf, proplen); 2095 break; 2096 2097 case PROP_TYPE_STRING: 2098 (void) strlcpy(propbuf, 2099 getprop_string(zhp, prop, &source), proplen); 2100 break; 2101 2102 case PROP_TYPE_INDEX: 2103 if (get_numeric_property(zhp, prop, src, 2104 &source, &val) != 0) 2105 return (-1); 2106 if (zfs_prop_index_to_string(prop, val, &strval) != 0) 2107 return (-1); 2108 (void) strlcpy(propbuf, strval, proplen); 2109 break; 2110 2111 default: 2112 abort(); 2113 } 2114 } 2115 2116 get_source(zhp, src, source, statbuf, statlen); 2117 2118 return (0); 2119 } 2120 2121 /* 2122 * Utility function to get the given numeric property. Does no validation that 2123 * the given property is the appropriate type; should only be used with 2124 * hard-coded property types. 2125 */ 2126 uint64_t 2127 zfs_prop_get_int(zfs_handle_t *zhp, zfs_prop_t prop) 2128 { 2129 char *source; 2130 uint64_t val; 2131 2132 (void) get_numeric_property(zhp, prop, NULL, &source, &val); 2133 2134 return (val); 2135 } 2136 2137 int 2138 zfs_prop_set_int(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t val) 2139 { 2140 char buf[64]; 2141 2142 (void) snprintf(buf, sizeof (buf), "%llu", (longlong_t)val); 2143 return (zfs_prop_set(zhp, zfs_prop_to_name(prop), buf)); 2144 } 2145 2146 /* 2147 * Similar to zfs_prop_get(), but returns the value as an integer. 2148 */ 2149 int 2150 zfs_prop_get_numeric(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t *value, 2151 zprop_source_t *src, char *statbuf, size_t statlen) 2152 { 2153 char *source; 2154 2155 /* 2156 * Check to see if this property applies to our object 2157 */ 2158 if (!zfs_prop_valid_for_type(prop, zhp->zfs_type)) { 2159 return (zfs_error_fmt(zhp->zfs_hdl, EZFS_PROPTYPE, 2160 dgettext(TEXT_DOMAIN, "cannot get property '%s'"), 2161 zfs_prop_to_name(prop))); 2162 } 2163 2164 if (src) 2165 *src = ZPROP_SRC_NONE; 2166 2167 if (get_numeric_property(zhp, prop, src, &source, value) != 0) 2168 return (-1); 2169 2170 get_source(zhp, src, source, statbuf, statlen); 2171 2172 return (0); 2173 } 2174 2175 static int 2176 idmap_id_to_numeric_domain_rid(uid_t id, boolean_t isuser, 2177 char **domainp, idmap_rid_t *ridp) 2178 { 2179 idmap_handle_t *idmap_hdl = NULL; 2180 idmap_get_handle_t *get_hdl = NULL; 2181 idmap_stat status; 2182 int err = EINVAL; 2183 2184 if (idmap_init(&idmap_hdl) != IDMAP_SUCCESS) 2185 goto out; 2186 if (idmap_get_create(idmap_hdl, &get_hdl) != IDMAP_SUCCESS) 2187 goto out; 2188 2189 if (isuser) { 2190 err = idmap_get_sidbyuid(get_hdl, id, 2191 IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status); 2192 } else { 2193 err = idmap_get_sidbygid(get_hdl, id, 2194 IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status); 2195 } 2196 if (err == IDMAP_SUCCESS && 2197 idmap_get_mappings(get_hdl) == IDMAP_SUCCESS && 2198 status == IDMAP_SUCCESS) 2199 err = 0; 2200 else 2201 err = EINVAL; 2202 out: 2203 if (get_hdl) 2204 idmap_get_destroy(get_hdl); 2205 if (idmap_hdl) 2206 (void) idmap_fini(idmap_hdl); 2207 return (err); 2208 } 2209 2210 /* 2211 * convert the propname into parameters needed by kernel 2212 * Eg: userquota@ahrens -> ZFS_PROP_USERQUOTA, "", 126829 2213 * Eg: userused@matt@domain -> ZFS_PROP_USERUSED, "S-1-123-456", 789 2214 */ 2215 static int 2216 userquota_propname_decode(const char *propname, boolean_t zoned, 2217 zfs_userquota_prop_t *typep, char *domain, int domainlen, uint64_t *ridp) 2218 { 2219 zfs_userquota_prop_t type; 2220 char *cp, *end; 2221 char *numericsid = NULL; 2222 boolean_t isuser; 2223 2224 domain[0] = '\0'; 2225 2226 /* Figure out the property type ({user|group}{quota|space}) */ 2227 for (type = 0; type < ZFS_NUM_USERQUOTA_PROPS; type++) { 2228 if (strncmp(propname, zfs_userquota_prop_prefixes[type], 2229 strlen(zfs_userquota_prop_prefixes[type])) == 0) 2230 break; 2231 } 2232 if (type == ZFS_NUM_USERQUOTA_PROPS) 2233 return (EINVAL); 2234 *typep = type; 2235 2236 isuser = (type == ZFS_PROP_USERQUOTA || 2237 type == ZFS_PROP_USERUSED); 2238 2239 cp = strchr(propname, '@') + 1; 2240 2241 if (strchr(cp, '@')) { 2242 /* 2243 * It's a SID name (eg "user@domain") that needs to be 2244 * turned into S-1-domainID-RID. 2245 */ 2246 directory_error_t e; 2247 if (zoned && getzoneid() == GLOBAL_ZONEID) 2248 return (ENOENT); 2249 if (isuser) { 2250 e = directory_sid_from_user_name(NULL, 2251 cp, &numericsid); 2252 } else { 2253 e = directory_sid_from_group_name(NULL, 2254 cp, &numericsid); 2255 } 2256 if (e != NULL) { 2257 directory_error_free(e); 2258 return (ENOENT); 2259 } 2260 if (numericsid == NULL) 2261 return (ENOENT); 2262 cp = numericsid; 2263 /* will be further decoded below */ 2264 } 2265 2266 if (strncmp(cp, "S-1-", 4) == 0) { 2267 /* It's a numeric SID (eg "S-1-234-567-89") */ 2268 (void) strlcpy(domain, cp, domainlen); 2269 cp = strrchr(domain, '-'); 2270 *cp = '\0'; 2271 cp++; 2272 2273 errno = 0; 2274 *ridp = strtoull(cp, &end, 10); 2275 if (numericsid) { 2276 free(numericsid); 2277 numericsid = NULL; 2278 } 2279 if (errno != 0 || *end != '\0') 2280 return (EINVAL); 2281 } else if (!isdigit(*cp)) { 2282 /* 2283 * It's a user/group name (eg "user") that needs to be 2284 * turned into a uid/gid 2285 */ 2286 if (zoned && getzoneid() == GLOBAL_ZONEID) 2287 return (ENOENT); 2288 if (isuser) { 2289 struct passwd *pw; 2290 pw = getpwnam(cp); 2291 if (pw == NULL) 2292 return (ENOENT); 2293 *ridp = pw->pw_uid; 2294 } else { 2295 struct group *gr; 2296 gr = getgrnam(cp); 2297 if (gr == NULL) 2298 return (ENOENT); 2299 *ridp = gr->gr_gid; 2300 } 2301 } else { 2302 /* It's a user/group ID (eg "12345"). */ 2303 uid_t id = strtoul(cp, &end, 10); 2304 idmap_rid_t rid; 2305 char *mapdomain; 2306 2307 if (*end != '\0') 2308 return (EINVAL); 2309 if (id > MAXUID) { 2310 /* It's an ephemeral ID. */ 2311 if (idmap_id_to_numeric_domain_rid(id, isuser, 2312 &mapdomain, &rid) != 0) 2313 return (ENOENT); 2314 (void) strlcpy(domain, mapdomain, domainlen); 2315 *ridp = rid; 2316 } else { 2317 *ridp = id; 2318 } 2319 } 2320 2321 ASSERT3P(numericsid, ==, NULL); 2322 return (0); 2323 } 2324 2325 static int 2326 zfs_prop_get_userquota_common(zfs_handle_t *zhp, const char *propname, 2327 uint64_t *propvalue, zfs_userquota_prop_t *typep) 2328 { 2329 int err; 2330 zfs_cmd_t zc = { 0 }; 2331 2332 (void) strncpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 2333 2334 err = userquota_propname_decode(propname, 2335 zfs_prop_get_int(zhp, ZFS_PROP_ZONED), 2336 typep, zc.zc_value, sizeof (zc.zc_value), &zc.zc_guid); 2337 zc.zc_objset_type = *typep; 2338 if (err) 2339 return (err); 2340 2341 err = ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_USERSPACE_ONE, &zc); 2342 if (err) 2343 return (err); 2344 2345 *propvalue = zc.zc_cookie; 2346 return (0); 2347 } 2348 2349 int 2350 zfs_prop_get_userquota_int(zfs_handle_t *zhp, const char *propname, 2351 uint64_t *propvalue) 2352 { 2353 zfs_userquota_prop_t type; 2354 2355 return (zfs_prop_get_userquota_common(zhp, propname, propvalue, 2356 &type)); 2357 } 2358 2359 int 2360 zfs_prop_get_userquota(zfs_handle_t *zhp, const char *propname, 2361 char *propbuf, int proplen, boolean_t literal) 2362 { 2363 int err; 2364 uint64_t propvalue; 2365 zfs_userquota_prop_t type; 2366 2367 err = zfs_prop_get_userquota_common(zhp, propname, &propvalue, 2368 &type); 2369 2370 if (err) 2371 return (err); 2372 2373 if (literal) { 2374 (void) snprintf(propbuf, proplen, "%llu", propvalue); 2375 } else if (propvalue == 0 && 2376 (type == ZFS_PROP_USERQUOTA || type == ZFS_PROP_GROUPQUOTA)) { 2377 (void) strlcpy(propbuf, "none", proplen); 2378 } else { 2379 zfs_nicenum(propvalue, propbuf, proplen); 2380 } 2381 return (0); 2382 } 2383 2384 /* 2385 * Returns the name of the given zfs handle. 2386 */ 2387 const char * 2388 zfs_get_name(const zfs_handle_t *zhp) 2389 { 2390 return (zhp->zfs_name); 2391 } 2392 2393 /* 2394 * Returns the type of the given zfs handle. 2395 */ 2396 zfs_type_t 2397 zfs_get_type(const zfs_handle_t *zhp) 2398 { 2399 return (zhp->zfs_type); 2400 } 2401 2402 static int 2403 zfs_do_list_ioctl(zfs_handle_t *zhp, int arg, zfs_cmd_t *zc) 2404 { 2405 int rc; 2406 uint64_t orig_cookie; 2407 2408 orig_cookie = zc->zc_cookie; 2409 top: 2410 (void) strlcpy(zc->zc_name, zhp->zfs_name, sizeof (zc->zc_name)); 2411 rc = ioctl(zhp->zfs_hdl->libzfs_fd, arg, zc); 2412 2413 if (rc == -1) { 2414 switch (errno) { 2415 case ENOMEM: 2416 /* expand nvlist memory and try again */ 2417 if (zcmd_expand_dst_nvlist(zhp->zfs_hdl, zc) != 0) { 2418 zcmd_free_nvlists(zc); 2419 return (-1); 2420 } 2421 zc->zc_cookie = orig_cookie; 2422 goto top; 2423 /* 2424 * An errno value of ESRCH indicates normal completion. 2425 * If ENOENT is returned, then the underlying dataset 2426 * has been removed since we obtained the handle. 2427 */ 2428 case ESRCH: 2429 case ENOENT: 2430 rc = 1; 2431 break; 2432 default: 2433 rc = zfs_standard_error(zhp->zfs_hdl, errno, 2434 dgettext(TEXT_DOMAIN, 2435 "cannot iterate filesystems")); 2436 break; 2437 } 2438 } 2439 return (rc); 2440 } 2441 2442 /* 2443 * Iterate over all child filesystems 2444 */ 2445 int 2446 zfs_iter_filesystems(zfs_handle_t *zhp, zfs_iter_f func, void *data) 2447 { 2448 zfs_cmd_t zc = { 0 }; 2449 zfs_handle_t *nzhp; 2450 int ret; 2451 2452 if (zhp->zfs_type != ZFS_TYPE_FILESYSTEM) 2453 return (0); 2454 2455 if (zcmd_alloc_dst_nvlist(zhp->zfs_hdl, &zc, 0) != 0) 2456 return (-1); 2457 2458 while ((ret = zfs_do_list_ioctl(zhp, ZFS_IOC_DATASET_LIST_NEXT, 2459 &zc)) == 0) { 2460 /* 2461 * Silently ignore errors, as the only plausible explanation is 2462 * that the pool has since been removed. 2463 */ 2464 if ((nzhp = make_dataset_handle_zc(zhp->zfs_hdl, 2465 &zc)) == NULL) { 2466 continue; 2467 } 2468 2469 if ((ret = func(nzhp, data)) != 0) { 2470 zcmd_free_nvlists(&zc); 2471 return (ret); 2472 } 2473 } 2474 zcmd_free_nvlists(&zc); 2475 return ((ret < 0) ? ret : 0); 2476 } 2477 2478 /* 2479 * Iterate over all snapshots 2480 */ 2481 int 2482 zfs_iter_snapshots(zfs_handle_t *zhp, zfs_iter_f func, void *data) 2483 { 2484 zfs_cmd_t zc = { 0 }; 2485 zfs_handle_t *nzhp; 2486 int ret; 2487 2488 if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) 2489 return (0); 2490 2491 if (zcmd_alloc_dst_nvlist(zhp->zfs_hdl, &zc, 0) != 0) 2492 return (-1); 2493 while ((ret = zfs_do_list_ioctl(zhp, ZFS_IOC_SNAPSHOT_LIST_NEXT, 2494 &zc)) == 0) { 2495 2496 if ((nzhp = make_dataset_handle_zc(zhp->zfs_hdl, 2497 &zc)) == NULL) { 2498 continue; 2499 } 2500 2501 if ((ret = func(nzhp, data)) != 0) { 2502 zcmd_free_nvlists(&zc); 2503 return (ret); 2504 } 2505 } 2506 zcmd_free_nvlists(&zc); 2507 return ((ret < 0) ? ret : 0); 2508 } 2509 2510 /* 2511 * Iterate over all children, snapshots and filesystems 2512 */ 2513 int 2514 zfs_iter_children(zfs_handle_t *zhp, zfs_iter_f func, void *data) 2515 { 2516 int ret; 2517 2518 if ((ret = zfs_iter_filesystems(zhp, func, data)) != 0) 2519 return (ret); 2520 2521 return (zfs_iter_snapshots(zhp, func, data)); 2522 } 2523 2524 /* 2525 * Is one dataset name a child dataset of another? 2526 * 2527 * Needs to handle these cases: 2528 * Dataset 1 "a/foo" "a/foo" "a/foo" "a/foo" 2529 * Dataset 2 "a/fo" "a/foobar" "a/bar/baz" "a/foo/bar" 2530 * Descendant? No. No. No. Yes. 2531 */ 2532 static boolean_t 2533 is_descendant(const char *ds1, const char *ds2) 2534 { 2535 size_t d1len = strlen(ds1); 2536 2537 /* ds2 can't be a descendant if it's smaller */ 2538 if (strlen(ds2) < d1len) 2539 return (B_FALSE); 2540 2541 /* otherwise, compare strings and verify that there's a '/' char */ 2542 return (ds2[d1len] == '/' && (strncmp(ds1, ds2, d1len) == 0)); 2543 } 2544 2545 /* 2546 * Given a complete name, return just the portion that refers to the parent. 2547 * Can return NULL if this is a pool. 2548 */ 2549 static int 2550 parent_name(const char *path, char *buf, size_t buflen) 2551 { 2552 char *loc; 2553 2554 if ((loc = strrchr(path, '/')) == NULL) 2555 return (-1); 2556 2557 (void) strncpy(buf, path, MIN(buflen, loc - path)); 2558 buf[loc - path] = '\0'; 2559 2560 return (0); 2561 } 2562 2563 /* 2564 * If accept_ancestor is false, then check to make sure that the given path has 2565 * a parent, and that it exists. If accept_ancestor is true, then find the 2566 * closest existing ancestor for the given path. In prefixlen return the 2567 * length of already existing prefix of the given path. We also fetch the 2568 * 'zoned' property, which is used to validate property settings when creating 2569 * new datasets. 2570 */ 2571 static int 2572 check_parents(libzfs_handle_t *hdl, const char *path, uint64_t *zoned, 2573 boolean_t accept_ancestor, int *prefixlen) 2574 { 2575 zfs_cmd_t zc = { 0 }; 2576 char parent[ZFS_MAXNAMELEN]; 2577 char *slash; 2578 zfs_handle_t *zhp; 2579 char errbuf[1024]; 2580 uint64_t is_zoned; 2581 2582 (void) snprintf(errbuf, sizeof (errbuf), 2583 dgettext(TEXT_DOMAIN, "cannot create '%s'"), path); 2584 2585 /* get parent, and check to see if this is just a pool */ 2586 if (parent_name(path, parent, sizeof (parent)) != 0) { 2587 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 2588 "missing dataset name")); 2589 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 2590 } 2591 2592 /* check to see if the pool exists */ 2593 if ((slash = strchr(parent, '/')) == NULL) 2594 slash = parent + strlen(parent); 2595 (void) strncpy(zc.zc_name, parent, slash - parent); 2596 zc.zc_name[slash - parent] = '\0'; 2597 if (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_STATS, &zc) != 0 && 2598 errno == ENOENT) { 2599 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 2600 "no such pool '%s'"), zc.zc_name); 2601 return (zfs_error(hdl, EZFS_NOENT, errbuf)); 2602 } 2603 2604 /* check to see if the parent dataset exists */ 2605 while ((zhp = make_dataset_handle(hdl, parent)) == NULL) { 2606 if (errno == ENOENT && accept_ancestor) { 2607 /* 2608 * Go deeper to find an ancestor, give up on top level. 2609 */ 2610 if (parent_name(parent, parent, sizeof (parent)) != 0) { 2611 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 2612 "no such pool '%s'"), zc.zc_name); 2613 return (zfs_error(hdl, EZFS_NOENT, errbuf)); 2614 } 2615 } else if (errno == ENOENT) { 2616 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 2617 "parent does not exist")); 2618 return (zfs_error(hdl, EZFS_NOENT, errbuf)); 2619 } else 2620 return (zfs_standard_error(hdl, errno, errbuf)); 2621 } 2622 2623 is_zoned = zfs_prop_get_int(zhp, ZFS_PROP_ZONED); 2624 if (zoned != NULL) 2625 *zoned = is_zoned; 2626 2627 /* we are in a non-global zone, but parent is in the global zone */ 2628 if (getzoneid() != GLOBAL_ZONEID && !is_zoned) { 2629 (void) zfs_standard_error(hdl, EPERM, errbuf); 2630 zfs_close(zhp); 2631 return (-1); 2632 } 2633 2634 /* make sure parent is a filesystem */ 2635 if (zfs_get_type(zhp) != ZFS_TYPE_FILESYSTEM) { 2636 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 2637 "parent is not a filesystem")); 2638 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf); 2639 zfs_close(zhp); 2640 return (-1); 2641 } 2642 2643 zfs_close(zhp); 2644 if (prefixlen != NULL) 2645 *prefixlen = strlen(parent); 2646 return (0); 2647 } 2648 2649 /* 2650 * Finds whether the dataset of the given type(s) exists. 2651 */ 2652 boolean_t 2653 zfs_dataset_exists(libzfs_handle_t *hdl, const char *path, zfs_type_t types) 2654 { 2655 zfs_handle_t *zhp; 2656 2657 if (!zfs_validate_name(hdl, path, types, B_FALSE)) 2658 return (B_FALSE); 2659 2660 /* 2661 * Try to get stats for the dataset, which will tell us if it exists. 2662 */ 2663 if ((zhp = make_dataset_handle(hdl, path)) != NULL) { 2664 int ds_type = zhp->zfs_type; 2665 2666 zfs_close(zhp); 2667 if (types & ds_type) 2668 return (B_TRUE); 2669 } 2670 return (B_FALSE); 2671 } 2672 2673 /* 2674 * Given a path to 'target', create all the ancestors between 2675 * the prefixlen portion of the path, and the target itself. 2676 * Fail if the initial prefixlen-ancestor does not already exist. 2677 */ 2678 int 2679 create_parents(libzfs_handle_t *hdl, char *target, int prefixlen) 2680 { 2681 zfs_handle_t *h; 2682 char *cp; 2683 const char *opname; 2684 2685 /* make sure prefix exists */ 2686 cp = target + prefixlen; 2687 if (*cp != '/') { 2688 assert(strchr(cp, '/') == NULL); 2689 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM); 2690 } else { 2691 *cp = '\0'; 2692 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM); 2693 *cp = '/'; 2694 } 2695 if (h == NULL) 2696 return (-1); 2697 zfs_close(h); 2698 2699 /* 2700 * Attempt to create, mount, and share any ancestor filesystems, 2701 * up to the prefixlen-long one. 2702 */ 2703 for (cp = target + prefixlen + 1; 2704 cp = strchr(cp, '/'); *cp = '/', cp++) { 2705 char *logstr; 2706 2707 *cp = '\0'; 2708 2709 h = make_dataset_handle(hdl, target); 2710 if (h) { 2711 /* it already exists, nothing to do here */ 2712 zfs_close(h); 2713 continue; 2714 } 2715 2716 logstr = hdl->libzfs_log_str; 2717 hdl->libzfs_log_str = NULL; 2718 if (zfs_create(hdl, target, ZFS_TYPE_FILESYSTEM, 2719 NULL) != 0) { 2720 hdl->libzfs_log_str = logstr; 2721 opname = dgettext(TEXT_DOMAIN, "create"); 2722 goto ancestorerr; 2723 } 2724 2725 hdl->libzfs_log_str = logstr; 2726 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM); 2727 if (h == NULL) { 2728 opname = dgettext(TEXT_DOMAIN, "open"); 2729 goto ancestorerr; 2730 } 2731 2732 if (zfs_mount(h, NULL, 0) != 0) { 2733 opname = dgettext(TEXT_DOMAIN, "mount"); 2734 goto ancestorerr; 2735 } 2736 2737 if (zfs_share(h) != 0) { 2738 opname = dgettext(TEXT_DOMAIN, "share"); 2739 goto ancestorerr; 2740 } 2741 2742 zfs_close(h); 2743 } 2744 2745 return (0); 2746 2747 ancestorerr: 2748 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 2749 "failed to %s ancestor '%s'"), opname, target); 2750 return (-1); 2751 } 2752 2753 /* 2754 * Creates non-existing ancestors of the given path. 2755 */ 2756 int 2757 zfs_create_ancestors(libzfs_handle_t *hdl, const char *path) 2758 { 2759 int prefix; 2760 char *path_copy; 2761 int rc; 2762 2763 if (check_parents(hdl, path, NULL, B_TRUE, &prefix) != 0) 2764 return (-1); 2765 2766 if ((path_copy = strdup(path)) != NULL) { 2767 rc = create_parents(hdl, path_copy, prefix); 2768 free(path_copy); 2769 } 2770 if (path_copy == NULL || rc != 0) 2771 return (-1); 2772 2773 return (0); 2774 } 2775 2776 /* 2777 * Create a new filesystem or volume. 2778 */ 2779 int 2780 zfs_create(libzfs_handle_t *hdl, const char *path, zfs_type_t type, 2781 nvlist_t *props) 2782 { 2783 zfs_cmd_t zc = { 0 }; 2784 int ret; 2785 uint64_t size = 0; 2786 uint64_t blocksize = zfs_prop_default_numeric(ZFS_PROP_VOLBLOCKSIZE); 2787 char errbuf[1024]; 2788 uint64_t zoned; 2789 2790 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 2791 "cannot create '%s'"), path); 2792 2793 /* validate the path, taking care to note the extended error message */ 2794 if (!zfs_validate_name(hdl, path, type, B_TRUE)) 2795 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 2796 2797 /* validate parents exist */ 2798 if (check_parents(hdl, path, &zoned, B_FALSE, NULL) != 0) 2799 return (-1); 2800 2801 /* 2802 * The failure modes when creating a dataset of a different type over 2803 * one that already exists is a little strange. In particular, if you 2804 * try to create a dataset on top of an existing dataset, the ioctl() 2805 * will return ENOENT, not EEXIST. To prevent this from happening, we 2806 * first try to see if the dataset exists. 2807 */ 2808 (void) strlcpy(zc.zc_name, path, sizeof (zc.zc_name)); 2809 if (zfs_dataset_exists(hdl, zc.zc_name, ZFS_TYPE_DATASET)) { 2810 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 2811 "dataset already exists")); 2812 return (zfs_error(hdl, EZFS_EXISTS, errbuf)); 2813 } 2814 2815 if (type == ZFS_TYPE_VOLUME) 2816 zc.zc_objset_type = DMU_OST_ZVOL; 2817 else 2818 zc.zc_objset_type = DMU_OST_ZFS; 2819 2820 if (props && (props = zfs_valid_proplist(hdl, type, props, 2821 zoned, NULL, errbuf)) == 0) 2822 return (-1); 2823 2824 if (type == ZFS_TYPE_VOLUME) { 2825 /* 2826 * If we are creating a volume, the size and block size must 2827 * satisfy a few restraints. First, the blocksize must be a 2828 * valid block size between SPA_{MIN,MAX}BLOCKSIZE. Second, the 2829 * volsize must be a multiple of the block size, and cannot be 2830 * zero. 2831 */ 2832 if (props == NULL || nvlist_lookup_uint64(props, 2833 zfs_prop_to_name(ZFS_PROP_VOLSIZE), &size) != 0) { 2834 nvlist_free(props); 2835 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 2836 "missing volume size")); 2837 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 2838 } 2839 2840 if ((ret = nvlist_lookup_uint64(props, 2841 zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE), 2842 &blocksize)) != 0) { 2843 if (ret == ENOENT) { 2844 blocksize = zfs_prop_default_numeric( 2845 ZFS_PROP_VOLBLOCKSIZE); 2846 } else { 2847 nvlist_free(props); 2848 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 2849 "missing volume block size")); 2850 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 2851 } 2852 } 2853 2854 if (size == 0) { 2855 nvlist_free(props); 2856 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 2857 "volume size cannot be zero")); 2858 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 2859 } 2860 2861 if (size % blocksize != 0) { 2862 nvlist_free(props); 2863 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 2864 "volume size must be a multiple of volume block " 2865 "size")); 2866 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 2867 } 2868 } 2869 2870 if (props && zcmd_write_src_nvlist(hdl, &zc, props) != 0) 2871 return (-1); 2872 nvlist_free(props); 2873 2874 /* create the dataset */ 2875 ret = zfs_ioctl(hdl, ZFS_IOC_CREATE, &zc); 2876 2877 zcmd_free_nvlists(&zc); 2878 2879 /* check for failure */ 2880 if (ret != 0) { 2881 char parent[ZFS_MAXNAMELEN]; 2882 (void) parent_name(path, parent, sizeof (parent)); 2883 2884 switch (errno) { 2885 case ENOENT: 2886 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 2887 "no such parent '%s'"), parent); 2888 return (zfs_error(hdl, EZFS_NOENT, errbuf)); 2889 2890 case EINVAL: 2891 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 2892 "parent '%s' is not a filesystem"), parent); 2893 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 2894 2895 case EDOM: 2896 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 2897 "volume block size must be power of 2 from " 2898 "%u to %uk"), 2899 (uint_t)SPA_MINBLOCKSIZE, 2900 (uint_t)SPA_MAXBLOCKSIZE >> 10); 2901 2902 return (zfs_error(hdl, EZFS_BADPROP, errbuf)); 2903 2904 case ENOTSUP: 2905 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 2906 "pool must be upgraded to set this " 2907 "property or value")); 2908 return (zfs_error(hdl, EZFS_BADVERSION, errbuf)); 2909 #ifdef _ILP32 2910 case EOVERFLOW: 2911 /* 2912 * This platform can't address a volume this big. 2913 */ 2914 if (type == ZFS_TYPE_VOLUME) 2915 return (zfs_error(hdl, EZFS_VOLTOOBIG, 2916 errbuf)); 2917 #endif 2918 /* FALLTHROUGH */ 2919 default: 2920 return (zfs_standard_error(hdl, errno, errbuf)); 2921 } 2922 } 2923 2924 return (0); 2925 } 2926 2927 /* 2928 * Destroys the given dataset. The caller must make sure that the filesystem 2929 * isn't mounted, and that there are no active dependents. 2930 */ 2931 int 2932 zfs_destroy(zfs_handle_t *zhp, boolean_t defer) 2933 { 2934 zfs_cmd_t zc = { 0 }; 2935 2936 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 2937 2938 if (ZFS_IS_VOLUME(zhp)) { 2939 /* 2940 * If user doesn't have permissions to unshare volume, then 2941 * abort the request. This would only happen for a 2942 * non-privileged user. 2943 */ 2944 if (zfs_unshare_iscsi(zhp) != 0) { 2945 return (-1); 2946 } 2947 2948 zc.zc_objset_type = DMU_OST_ZVOL; 2949 } else { 2950 zc.zc_objset_type = DMU_OST_ZFS; 2951 } 2952 2953 zc.zc_defer_destroy = defer; 2954 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_DESTROY, &zc) != 0) { 2955 return (zfs_standard_error_fmt(zhp->zfs_hdl, errno, 2956 dgettext(TEXT_DOMAIN, "cannot destroy '%s'"), 2957 zhp->zfs_name)); 2958 } 2959 2960 remove_mountpoint(zhp); 2961 2962 return (0); 2963 } 2964 2965 struct destroydata { 2966 char *snapname; 2967 boolean_t gotone; 2968 boolean_t closezhp; 2969 }; 2970 2971 static int 2972 zfs_check_snap_cb(zfs_handle_t *zhp, void *arg) 2973 { 2974 struct destroydata *dd = arg; 2975 zfs_handle_t *szhp; 2976 char name[ZFS_MAXNAMELEN]; 2977 boolean_t closezhp = dd->closezhp; 2978 int rv = 0; 2979 2980 (void) strlcpy(name, zhp->zfs_name, sizeof (name)); 2981 (void) strlcat(name, "@", sizeof (name)); 2982 (void) strlcat(name, dd->snapname, sizeof (name)); 2983 2984 szhp = make_dataset_handle(zhp->zfs_hdl, name); 2985 if (szhp) { 2986 dd->gotone = B_TRUE; 2987 zfs_close(szhp); 2988 } 2989 2990 dd->closezhp = B_TRUE; 2991 if (!dd->gotone) 2992 rv = zfs_iter_filesystems(zhp, zfs_check_snap_cb, arg); 2993 if (closezhp) 2994 zfs_close(zhp); 2995 return (rv); 2996 } 2997 2998 /* 2999 * Destroys all snapshots with the given name in zhp & descendants. 3000 */ 3001 int 3002 zfs_destroy_snaps(zfs_handle_t *zhp, char *snapname, boolean_t defer) 3003 { 3004 zfs_cmd_t zc = { 0 }; 3005 int ret; 3006 struct destroydata dd = { 0 }; 3007 3008 dd.snapname = snapname; 3009 (void) zfs_check_snap_cb(zhp, &dd); 3010 3011 if (!dd.gotone) { 3012 return (zfs_standard_error_fmt(zhp->zfs_hdl, ENOENT, 3013 dgettext(TEXT_DOMAIN, "cannot destroy '%s@%s'"), 3014 zhp->zfs_name, snapname)); 3015 } 3016 3017 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 3018 (void) strlcpy(zc.zc_value, snapname, sizeof (zc.zc_value)); 3019 zc.zc_defer_destroy = defer; 3020 3021 ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_DESTROY_SNAPS, &zc); 3022 if (ret != 0) { 3023 char errbuf[1024]; 3024 3025 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3026 "cannot destroy '%s@%s'"), zc.zc_name, snapname); 3027 3028 switch (errno) { 3029 case EEXIST: 3030 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN, 3031 "snapshot is cloned")); 3032 return (zfs_error(zhp->zfs_hdl, EZFS_EXISTS, errbuf)); 3033 3034 default: 3035 return (zfs_standard_error(zhp->zfs_hdl, errno, 3036 errbuf)); 3037 } 3038 } 3039 3040 return (0); 3041 } 3042 3043 /* 3044 * Clones the given dataset. The target must be of the same type as the source. 3045 */ 3046 int 3047 zfs_clone(zfs_handle_t *zhp, const char *target, nvlist_t *props) 3048 { 3049 zfs_cmd_t zc = { 0 }; 3050 char parent[ZFS_MAXNAMELEN]; 3051 int ret; 3052 char errbuf[1024]; 3053 libzfs_handle_t *hdl = zhp->zfs_hdl; 3054 zfs_type_t type; 3055 uint64_t zoned; 3056 3057 assert(zhp->zfs_type == ZFS_TYPE_SNAPSHOT); 3058 3059 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3060 "cannot create '%s'"), target); 3061 3062 /* validate the target name */ 3063 if (!zfs_validate_name(hdl, target, ZFS_TYPE_FILESYSTEM, B_TRUE)) 3064 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3065 3066 /* validate parents exist */ 3067 if (check_parents(hdl, target, &zoned, B_FALSE, NULL) != 0) 3068 return (-1); 3069 3070 (void) parent_name(target, parent, sizeof (parent)); 3071 3072 /* do the clone */ 3073 if (ZFS_IS_VOLUME(zhp)) { 3074 zc.zc_objset_type = DMU_OST_ZVOL; 3075 type = ZFS_TYPE_VOLUME; 3076 } else { 3077 zc.zc_objset_type = DMU_OST_ZFS; 3078 type = ZFS_TYPE_FILESYSTEM; 3079 } 3080 3081 if (props) { 3082 if ((props = zfs_valid_proplist(hdl, type, props, zoned, 3083 zhp, errbuf)) == NULL) 3084 return (-1); 3085 3086 if (zcmd_write_src_nvlist(hdl, &zc, props) != 0) { 3087 nvlist_free(props); 3088 return (-1); 3089 } 3090 3091 nvlist_free(props); 3092 } 3093 3094 (void) strlcpy(zc.zc_name, target, sizeof (zc.zc_name)); 3095 (void) strlcpy(zc.zc_value, zhp->zfs_name, sizeof (zc.zc_value)); 3096 ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_CREATE, &zc); 3097 3098 zcmd_free_nvlists(&zc); 3099 3100 if (ret != 0) { 3101 switch (errno) { 3102 3103 case ENOENT: 3104 /* 3105 * The parent doesn't exist. We should have caught this 3106 * above, but there may a race condition that has since 3107 * destroyed the parent. 3108 * 3109 * At this point, we don't know whether it's the source 3110 * that doesn't exist anymore, or whether the target 3111 * dataset doesn't exist. 3112 */ 3113 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN, 3114 "no such parent '%s'"), parent); 3115 return (zfs_error(zhp->zfs_hdl, EZFS_NOENT, errbuf)); 3116 3117 case EXDEV: 3118 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN, 3119 "source and target pools differ")); 3120 return (zfs_error(zhp->zfs_hdl, EZFS_CROSSTARGET, 3121 errbuf)); 3122 3123 default: 3124 return (zfs_standard_error(zhp->zfs_hdl, errno, 3125 errbuf)); 3126 } 3127 } 3128 3129 return (ret); 3130 } 3131 3132 /* 3133 * Promotes the given clone fs to be the clone parent. 3134 */ 3135 int 3136 zfs_promote(zfs_handle_t *zhp) 3137 { 3138 libzfs_handle_t *hdl = zhp->zfs_hdl; 3139 zfs_cmd_t zc = { 0 }; 3140 char parent[MAXPATHLEN]; 3141 int ret; 3142 char errbuf[1024]; 3143 3144 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3145 "cannot promote '%s'"), zhp->zfs_name); 3146 3147 if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) { 3148 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3149 "snapshots can not be promoted")); 3150 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 3151 } 3152 3153 (void) strlcpy(parent, zhp->zfs_dmustats.dds_origin, sizeof (parent)); 3154 if (parent[0] == '\0') { 3155 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3156 "not a cloned filesystem")); 3157 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 3158 } 3159 3160 (void) strlcpy(zc.zc_value, zhp->zfs_dmustats.dds_origin, 3161 sizeof (zc.zc_value)); 3162 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 3163 ret = zfs_ioctl(hdl, ZFS_IOC_PROMOTE, &zc); 3164 3165 if (ret != 0) { 3166 int save_errno = errno; 3167 3168 switch (save_errno) { 3169 case EEXIST: 3170 /* There is a conflicting snapshot name. */ 3171 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3172 "conflicting snapshot '%s' from parent '%s'"), 3173 zc.zc_string, parent); 3174 return (zfs_error(hdl, EZFS_EXISTS, errbuf)); 3175 3176 default: 3177 return (zfs_standard_error(hdl, save_errno, errbuf)); 3178 } 3179 } 3180 return (ret); 3181 } 3182 3183 /* 3184 * Takes a snapshot of the given dataset. 3185 */ 3186 int 3187 zfs_snapshot(libzfs_handle_t *hdl, const char *path, boolean_t recursive, 3188 nvlist_t *props) 3189 { 3190 const char *delim; 3191 char parent[ZFS_MAXNAMELEN]; 3192 zfs_handle_t *zhp; 3193 zfs_cmd_t zc = { 0 }; 3194 int ret; 3195 char errbuf[1024]; 3196 3197 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3198 "cannot snapshot '%s'"), path); 3199 3200 /* validate the target name */ 3201 if (!zfs_validate_name(hdl, path, ZFS_TYPE_SNAPSHOT, B_TRUE)) 3202 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3203 3204 if (props) { 3205 if ((props = zfs_valid_proplist(hdl, ZFS_TYPE_SNAPSHOT, 3206 props, B_FALSE, NULL, errbuf)) == NULL) 3207 return (-1); 3208 3209 if (zcmd_write_src_nvlist(hdl, &zc, props) != 0) { 3210 nvlist_free(props); 3211 return (-1); 3212 } 3213 3214 nvlist_free(props); 3215 } 3216 3217 /* make sure the parent exists and is of the appropriate type */ 3218 delim = strchr(path, '@'); 3219 (void) strncpy(parent, path, delim - path); 3220 parent[delim - path] = '\0'; 3221 3222 if ((zhp = zfs_open(hdl, parent, ZFS_TYPE_FILESYSTEM | 3223 ZFS_TYPE_VOLUME)) == NULL) { 3224 zcmd_free_nvlists(&zc); 3225 return (-1); 3226 } 3227 3228 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 3229 (void) strlcpy(zc.zc_value, delim+1, sizeof (zc.zc_value)); 3230 if (ZFS_IS_VOLUME(zhp)) 3231 zc.zc_objset_type = DMU_OST_ZVOL; 3232 else 3233 zc.zc_objset_type = DMU_OST_ZFS; 3234 zc.zc_cookie = recursive; 3235 ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_SNAPSHOT, &zc); 3236 3237 zcmd_free_nvlists(&zc); 3238 3239 /* 3240 * if it was recursive, the one that actually failed will be in 3241 * zc.zc_name. 3242 */ 3243 if (ret != 0) { 3244 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3245 "cannot create snapshot '%s@%s'"), zc.zc_name, zc.zc_value); 3246 (void) zfs_standard_error(hdl, errno, errbuf); 3247 } 3248 3249 zfs_close(zhp); 3250 3251 return (ret); 3252 } 3253 3254 /* 3255 * Destroy any more recent snapshots. We invoke this callback on any dependents 3256 * of the snapshot first. If the 'cb_dependent' member is non-zero, then this 3257 * is a dependent and we should just destroy it without checking the transaction 3258 * group. 3259 */ 3260 typedef struct rollback_data { 3261 const char *cb_target; /* the snapshot */ 3262 uint64_t cb_create; /* creation time reference */ 3263 boolean_t cb_error; 3264 boolean_t cb_dependent; 3265 boolean_t cb_force; 3266 } rollback_data_t; 3267 3268 static int 3269 rollback_destroy(zfs_handle_t *zhp, void *data) 3270 { 3271 rollback_data_t *cbp = data; 3272 3273 if (!cbp->cb_dependent) { 3274 if (strcmp(zhp->zfs_name, cbp->cb_target) != 0 && 3275 zfs_get_type(zhp) == ZFS_TYPE_SNAPSHOT && 3276 zfs_prop_get_int(zhp, ZFS_PROP_CREATETXG) > 3277 cbp->cb_create) { 3278 char *logstr; 3279 3280 cbp->cb_dependent = B_TRUE; 3281 cbp->cb_error |= zfs_iter_dependents(zhp, B_FALSE, 3282 rollback_destroy, cbp); 3283 cbp->cb_dependent = B_FALSE; 3284 3285 logstr = zhp->zfs_hdl->libzfs_log_str; 3286 zhp->zfs_hdl->libzfs_log_str = NULL; 3287 cbp->cb_error |= zfs_destroy(zhp, B_FALSE); 3288 zhp->zfs_hdl->libzfs_log_str = logstr; 3289 } 3290 } else { 3291 /* We must destroy this clone; first unmount it */ 3292 prop_changelist_t *clp; 3293 3294 clp = changelist_gather(zhp, ZFS_PROP_NAME, 0, 3295 cbp->cb_force ? MS_FORCE: 0); 3296 if (clp == NULL || changelist_prefix(clp) != 0) { 3297 cbp->cb_error = B_TRUE; 3298 zfs_close(zhp); 3299 return (0); 3300 } 3301 if (zfs_destroy(zhp, B_FALSE) != 0) 3302 cbp->cb_error = B_TRUE; 3303 else 3304 changelist_remove(clp, zhp->zfs_name); 3305 (void) changelist_postfix(clp); 3306 changelist_free(clp); 3307 } 3308 3309 zfs_close(zhp); 3310 return (0); 3311 } 3312 3313 /* 3314 * Given a dataset, rollback to a specific snapshot, discarding any 3315 * data changes since then and making it the active dataset. 3316 * 3317 * Any snapshots more recent than the target are destroyed, along with 3318 * their dependents. 3319 */ 3320 int 3321 zfs_rollback(zfs_handle_t *zhp, zfs_handle_t *snap, boolean_t force) 3322 { 3323 rollback_data_t cb = { 0 }; 3324 int err; 3325 zfs_cmd_t zc = { 0 }; 3326 boolean_t restore_resv = 0; 3327 uint64_t old_volsize, new_volsize; 3328 zfs_prop_t resv_prop; 3329 3330 assert(zhp->zfs_type == ZFS_TYPE_FILESYSTEM || 3331 zhp->zfs_type == ZFS_TYPE_VOLUME); 3332 3333 /* 3334 * Destroy all recent snapshots and its dependends. 3335 */ 3336 cb.cb_force = force; 3337 cb.cb_target = snap->zfs_name; 3338 cb.cb_create = zfs_prop_get_int(snap, ZFS_PROP_CREATETXG); 3339 (void) zfs_iter_children(zhp, rollback_destroy, &cb); 3340 3341 if (cb.cb_error) 3342 return (-1); 3343 3344 /* 3345 * Now that we have verified that the snapshot is the latest, 3346 * rollback to the given snapshot. 3347 */ 3348 3349 if (zhp->zfs_type == ZFS_TYPE_VOLUME) { 3350 if (zfs_which_resv_prop(zhp, &resv_prop) < 0) 3351 return (-1); 3352 old_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE); 3353 restore_resv = 3354 (old_volsize == zfs_prop_get_int(zhp, resv_prop)); 3355 } 3356 3357 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 3358 3359 if (ZFS_IS_VOLUME(zhp)) 3360 zc.zc_objset_type = DMU_OST_ZVOL; 3361 else 3362 zc.zc_objset_type = DMU_OST_ZFS; 3363 3364 /* 3365 * We rely on zfs_iter_children() to verify that there are no 3366 * newer snapshots for the given dataset. Therefore, we can 3367 * simply pass the name on to the ioctl() call. There is still 3368 * an unlikely race condition where the user has taken a 3369 * snapshot since we verified that this was the most recent. 3370 * 3371 */ 3372 if ((err = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_ROLLBACK, &zc)) != 0) { 3373 (void) zfs_standard_error_fmt(zhp->zfs_hdl, errno, 3374 dgettext(TEXT_DOMAIN, "cannot rollback '%s'"), 3375 zhp->zfs_name); 3376 return (err); 3377 } 3378 3379 /* 3380 * For volumes, if the pre-rollback volsize matched the pre- 3381 * rollback reservation and the volsize has changed then set 3382 * the reservation property to the post-rollback volsize. 3383 * Make a new handle since the rollback closed the dataset. 3384 */ 3385 if ((zhp->zfs_type == ZFS_TYPE_VOLUME) && 3386 (zhp = make_dataset_handle(zhp->zfs_hdl, zhp->zfs_name))) { 3387 if (restore_resv) { 3388 new_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE); 3389 if (old_volsize != new_volsize) 3390 err = zfs_prop_set_int(zhp, resv_prop, 3391 new_volsize); 3392 } 3393 zfs_close(zhp); 3394 } 3395 return (err); 3396 } 3397 3398 /* 3399 * Iterate over all dependents for a given dataset. This includes both 3400 * hierarchical dependents (children) and data dependents (snapshots and 3401 * clones). The bulk of the processing occurs in get_dependents() in 3402 * libzfs_graph.c. 3403 */ 3404 int 3405 zfs_iter_dependents(zfs_handle_t *zhp, boolean_t allowrecursion, 3406 zfs_iter_f func, void *data) 3407 { 3408 char **dependents; 3409 size_t count; 3410 int i; 3411 zfs_handle_t *child; 3412 int ret = 0; 3413 3414 if (get_dependents(zhp->zfs_hdl, allowrecursion, zhp->zfs_name, 3415 &dependents, &count) != 0) 3416 return (-1); 3417 3418 for (i = 0; i < count; i++) { 3419 if ((child = make_dataset_handle(zhp->zfs_hdl, 3420 dependents[i])) == NULL) 3421 continue; 3422 3423 if ((ret = func(child, data)) != 0) 3424 break; 3425 } 3426 3427 for (i = 0; i < count; i++) 3428 free(dependents[i]); 3429 free(dependents); 3430 3431 return (ret); 3432 } 3433 3434 /* 3435 * Renames the given dataset. 3436 */ 3437 int 3438 zfs_rename(zfs_handle_t *zhp, const char *target, boolean_t recursive) 3439 { 3440 int ret; 3441 zfs_cmd_t zc = { 0 }; 3442 char *delim; 3443 prop_changelist_t *cl = NULL; 3444 zfs_handle_t *zhrp = NULL; 3445 char *parentname = NULL; 3446 char parent[ZFS_MAXNAMELEN]; 3447 libzfs_handle_t *hdl = zhp->zfs_hdl; 3448 char errbuf[1024]; 3449 3450 /* if we have the same exact name, just return success */ 3451 if (strcmp(zhp->zfs_name, target) == 0) 3452 return (0); 3453 3454 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3455 "cannot rename to '%s'"), target); 3456 3457 /* 3458 * Make sure the target name is valid 3459 */ 3460 if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) { 3461 if ((strchr(target, '@') == NULL) || 3462 *target == '@') { 3463 /* 3464 * Snapshot target name is abbreviated, 3465 * reconstruct full dataset name 3466 */ 3467 (void) strlcpy(parent, zhp->zfs_name, 3468 sizeof (parent)); 3469 delim = strchr(parent, '@'); 3470 if (strchr(target, '@') == NULL) 3471 *(++delim) = '\0'; 3472 else 3473 *delim = '\0'; 3474 (void) strlcat(parent, target, sizeof (parent)); 3475 target = parent; 3476 } else { 3477 /* 3478 * Make sure we're renaming within the same dataset. 3479 */ 3480 delim = strchr(target, '@'); 3481 if (strncmp(zhp->zfs_name, target, delim - target) 3482 != 0 || zhp->zfs_name[delim - target] != '@') { 3483 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3484 "snapshots must be part of same " 3485 "dataset")); 3486 return (zfs_error(hdl, EZFS_CROSSTARGET, 3487 errbuf)); 3488 } 3489 } 3490 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE)) 3491 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3492 } else { 3493 if (recursive) { 3494 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3495 "recursive rename must be a snapshot")); 3496 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 3497 } 3498 3499 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE)) 3500 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3501 3502 /* validate parents */ 3503 if (check_parents(hdl, target, NULL, B_FALSE, NULL) != 0) 3504 return (-1); 3505 3506 /* make sure we're in the same pool */ 3507 verify((delim = strchr(target, '/')) != NULL); 3508 if (strncmp(zhp->zfs_name, target, delim - target) != 0 || 3509 zhp->zfs_name[delim - target] != '/') { 3510 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3511 "datasets must be within same pool")); 3512 return (zfs_error(hdl, EZFS_CROSSTARGET, errbuf)); 3513 } 3514 3515 /* new name cannot be a child of the current dataset name */ 3516 if (is_descendant(zhp->zfs_name, target)) { 3517 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3518 "New dataset name cannot be a descendant of " 3519 "current dataset name")); 3520 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf)); 3521 } 3522 } 3523 3524 (void) snprintf(errbuf, sizeof (errbuf), 3525 dgettext(TEXT_DOMAIN, "cannot rename '%s'"), zhp->zfs_name); 3526 3527 if (getzoneid() == GLOBAL_ZONEID && 3528 zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) { 3529 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3530 "dataset is used in a non-global zone")); 3531 return (zfs_error(hdl, EZFS_ZONED, errbuf)); 3532 } 3533 3534 if (recursive) { 3535 3536 parentname = zfs_strdup(zhp->zfs_hdl, zhp->zfs_name); 3537 if (parentname == NULL) { 3538 ret = -1; 3539 goto error; 3540 } 3541 delim = strchr(parentname, '@'); 3542 *delim = '\0'; 3543 zhrp = zfs_open(zhp->zfs_hdl, parentname, ZFS_TYPE_DATASET); 3544 if (zhrp == NULL) { 3545 ret = -1; 3546 goto error; 3547 } 3548 3549 } else { 3550 if ((cl = changelist_gather(zhp, ZFS_PROP_NAME, 0, 0)) == NULL) 3551 return (-1); 3552 3553 if (changelist_haszonedchild(cl)) { 3554 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3555 "child dataset with inherited mountpoint is used " 3556 "in a non-global zone")); 3557 (void) zfs_error(hdl, EZFS_ZONED, errbuf); 3558 goto error; 3559 } 3560 3561 if ((ret = changelist_prefix(cl)) != 0) 3562 goto error; 3563 } 3564 3565 if (ZFS_IS_VOLUME(zhp)) 3566 zc.zc_objset_type = DMU_OST_ZVOL; 3567 else 3568 zc.zc_objset_type = DMU_OST_ZFS; 3569 3570 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 3571 (void) strlcpy(zc.zc_value, target, sizeof (zc.zc_value)); 3572 3573 zc.zc_cookie = recursive; 3574 3575 if ((ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_RENAME, &zc)) != 0) { 3576 /* 3577 * if it was recursive, the one that actually failed will 3578 * be in zc.zc_name 3579 */ 3580 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3581 "cannot rename '%s'"), zc.zc_name); 3582 3583 if (recursive && errno == EEXIST) { 3584 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3585 "a child dataset already has a snapshot " 3586 "with the new name")); 3587 (void) zfs_error(hdl, EZFS_EXISTS, errbuf); 3588 } else { 3589 (void) zfs_standard_error(zhp->zfs_hdl, errno, errbuf); 3590 } 3591 3592 /* 3593 * On failure, we still want to remount any filesystems that 3594 * were previously mounted, so we don't alter the system state. 3595 */ 3596 if (!recursive) 3597 (void) changelist_postfix(cl); 3598 } else { 3599 if (!recursive) { 3600 changelist_rename(cl, zfs_get_name(zhp), target); 3601 ret = changelist_postfix(cl); 3602 } 3603 } 3604 3605 error: 3606 if (parentname) { 3607 free(parentname); 3608 } 3609 if (zhrp) { 3610 zfs_close(zhrp); 3611 } 3612 if (cl) { 3613 changelist_free(cl); 3614 } 3615 return (ret); 3616 } 3617 3618 nvlist_t * 3619 zfs_get_user_props(zfs_handle_t *zhp) 3620 { 3621 return (zhp->zfs_user_props); 3622 } 3623 3624 nvlist_t * 3625 zfs_get_recvd_props(zfs_handle_t *zhp) 3626 { 3627 if (zhp->zfs_recvd_props == NULL) 3628 if (get_recvd_props_ioctl(zhp) != 0) 3629 return (NULL); 3630 return (zhp->zfs_recvd_props); 3631 } 3632 3633 /* 3634 * This function is used by 'zfs list' to determine the exact set of columns to 3635 * display, and their maximum widths. This does two main things: 3636 * 3637 * - If this is a list of all properties, then expand the list to include 3638 * all native properties, and set a flag so that for each dataset we look 3639 * for new unique user properties and add them to the list. 3640 * 3641 * - For non fixed-width properties, keep track of the maximum width seen 3642 * so that we can size the column appropriately. If the user has 3643 * requested received property values, we also need to compute the width 3644 * of the RECEIVED column. 3645 */ 3646 int 3647 zfs_expand_proplist(zfs_handle_t *zhp, zprop_list_t **plp, boolean_t received) 3648 { 3649 libzfs_handle_t *hdl = zhp->zfs_hdl; 3650 zprop_list_t *entry; 3651 zprop_list_t **last, **start; 3652 nvlist_t *userprops, *propval; 3653 nvpair_t *elem; 3654 char *strval; 3655 char buf[ZFS_MAXPROPLEN]; 3656 3657 if (zprop_expand_list(hdl, plp, ZFS_TYPE_DATASET) != 0) 3658 return (-1); 3659 3660 userprops = zfs_get_user_props(zhp); 3661 3662 entry = *plp; 3663 if (entry->pl_all && nvlist_next_nvpair(userprops, NULL) != NULL) { 3664 /* 3665 * Go through and add any user properties as necessary. We 3666 * start by incrementing our list pointer to the first 3667 * non-native property. 3668 */ 3669 start = plp; 3670 while (*start != NULL) { 3671 if ((*start)->pl_prop == ZPROP_INVAL) 3672 break; 3673 start = &(*start)->pl_next; 3674 } 3675 3676 elem = NULL; 3677 while ((elem = nvlist_next_nvpair(userprops, elem)) != NULL) { 3678 /* 3679 * See if we've already found this property in our list. 3680 */ 3681 for (last = start; *last != NULL; 3682 last = &(*last)->pl_next) { 3683 if (strcmp((*last)->pl_user_prop, 3684 nvpair_name(elem)) == 0) 3685 break; 3686 } 3687 3688 if (*last == NULL) { 3689 if ((entry = zfs_alloc(hdl, 3690 sizeof (zprop_list_t))) == NULL || 3691 ((entry->pl_user_prop = zfs_strdup(hdl, 3692 nvpair_name(elem)))) == NULL) { 3693 free(entry); 3694 return (-1); 3695 } 3696 3697 entry->pl_prop = ZPROP_INVAL; 3698 entry->pl_width = strlen(nvpair_name(elem)); 3699 entry->pl_all = B_TRUE; 3700 *last = entry; 3701 } 3702 } 3703 } 3704 3705 /* 3706 * Now go through and check the width of any non-fixed columns 3707 */ 3708 for (entry = *plp; entry != NULL; entry = entry->pl_next) { 3709 if (entry->pl_fixed) 3710 continue; 3711 3712 if (entry->pl_prop != ZPROP_INVAL) { 3713 if (zfs_prop_get(zhp, entry->pl_prop, 3714 buf, sizeof (buf), NULL, NULL, 0, B_FALSE) == 0) { 3715 if (strlen(buf) > entry->pl_width) 3716 entry->pl_width = strlen(buf); 3717 } 3718 if (received && zfs_prop_get_recvd(zhp, 3719 zfs_prop_to_name(entry->pl_prop), 3720 buf, sizeof (buf), B_FALSE) == 0) 3721 if (strlen(buf) > entry->pl_recvd_width) 3722 entry->pl_recvd_width = strlen(buf); 3723 } else { 3724 if (nvlist_lookup_nvlist(userprops, entry->pl_user_prop, 3725 &propval) == 0) { 3726 verify(nvlist_lookup_string(propval, 3727 ZPROP_VALUE, &strval) == 0); 3728 if (strlen(strval) > entry->pl_width) 3729 entry->pl_width = strlen(strval); 3730 } 3731 if (received && zfs_prop_get_recvd(zhp, 3732 entry->pl_user_prop, 3733 buf, sizeof (buf), B_FALSE) == 0) 3734 if (strlen(buf) > entry->pl_recvd_width) 3735 entry->pl_recvd_width = strlen(buf); 3736 } 3737 } 3738 3739 return (0); 3740 } 3741 3742 int 3743 zfs_iscsi_perm_check(libzfs_handle_t *hdl, char *dataset, ucred_t *cred) 3744 { 3745 zfs_cmd_t zc = { 0 }; 3746 nvlist_t *nvp; 3747 gid_t gid; 3748 uid_t uid; 3749 const gid_t *groups; 3750 int group_cnt; 3751 int error; 3752 3753 if (nvlist_alloc(&nvp, NV_UNIQUE_NAME, 0) != 0) 3754 return (no_memory(hdl)); 3755 3756 uid = ucred_geteuid(cred); 3757 gid = ucred_getegid(cred); 3758 group_cnt = ucred_getgroups(cred, &groups); 3759 3760 if (uid == (uid_t)-1 || gid == (uid_t)-1 || group_cnt == (uid_t)-1) 3761 return (1); 3762 3763 if (nvlist_add_uint32(nvp, ZFS_DELEG_PERM_UID, uid) != 0) { 3764 nvlist_free(nvp); 3765 return (1); 3766 } 3767 3768 if (nvlist_add_uint32(nvp, ZFS_DELEG_PERM_GID, gid) != 0) { 3769 nvlist_free(nvp); 3770 return (1); 3771 } 3772 3773 if (nvlist_add_uint32_array(nvp, 3774 ZFS_DELEG_PERM_GROUPS, (uint32_t *)groups, group_cnt) != 0) { 3775 nvlist_free(nvp); 3776 return (1); 3777 } 3778 (void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name)); 3779 3780 if (zcmd_write_src_nvlist(hdl, &zc, nvp)) 3781 return (-1); 3782 3783 error = ioctl(hdl->libzfs_fd, ZFS_IOC_ISCSI_PERM_CHECK, &zc); 3784 nvlist_free(nvp); 3785 return (error); 3786 } 3787 3788 int 3789 zfs_deleg_share_nfs(libzfs_handle_t *hdl, char *dataset, char *path, 3790 char *resource, void *export, void *sharetab, 3791 int sharemax, zfs_share_op_t operation) 3792 { 3793 zfs_cmd_t zc = { 0 }; 3794 int error; 3795 3796 (void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name)); 3797 (void) strlcpy(zc.zc_value, path, sizeof (zc.zc_value)); 3798 if (resource) 3799 (void) strlcpy(zc.zc_string, resource, sizeof (zc.zc_string)); 3800 zc.zc_share.z_sharedata = (uint64_t)(uintptr_t)sharetab; 3801 zc.zc_share.z_exportdata = (uint64_t)(uintptr_t)export; 3802 zc.zc_share.z_sharetype = operation; 3803 zc.zc_share.z_sharemax = sharemax; 3804 error = ioctl(hdl->libzfs_fd, ZFS_IOC_SHARE, &zc); 3805 return (error); 3806 } 3807 3808 void 3809 zfs_prune_proplist(zfs_handle_t *zhp, uint8_t *props) 3810 { 3811 nvpair_t *curr; 3812 3813 /* 3814 * Keep a reference to the props-table against which we prune the 3815 * properties. 3816 */ 3817 zhp->zfs_props_table = props; 3818 3819 curr = nvlist_next_nvpair(zhp->zfs_props, NULL); 3820 3821 while (curr) { 3822 zfs_prop_t zfs_prop = zfs_name_to_prop(nvpair_name(curr)); 3823 nvpair_t *next = nvlist_next_nvpair(zhp->zfs_props, curr); 3824 3825 /* 3826 * User properties will result in ZPROP_INVAL, and since we 3827 * only know how to prune standard ZFS properties, we always 3828 * leave these in the list. This can also happen if we 3829 * encounter an unknown DSL property (when running older 3830 * software, for example). 3831 */ 3832 if (zfs_prop != ZPROP_INVAL && props[zfs_prop] == B_FALSE) 3833 (void) nvlist_remove(zhp->zfs_props, 3834 nvpair_name(curr), nvpair_type(curr)); 3835 curr = next; 3836 } 3837 } 3838 3839 static int 3840 zfs_smb_acl_mgmt(libzfs_handle_t *hdl, char *dataset, char *path, 3841 zfs_smb_acl_op_t cmd, char *resource1, char *resource2) 3842 { 3843 zfs_cmd_t zc = { 0 }; 3844 nvlist_t *nvlist = NULL; 3845 int error; 3846 3847 (void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name)); 3848 (void) strlcpy(zc.zc_value, path, sizeof (zc.zc_value)); 3849 zc.zc_cookie = (uint64_t)cmd; 3850 3851 if (cmd == ZFS_SMB_ACL_RENAME) { 3852 if (nvlist_alloc(&nvlist, NV_UNIQUE_NAME, 0) != 0) { 3853 (void) no_memory(hdl); 3854 return (NULL); 3855 } 3856 } 3857 3858 switch (cmd) { 3859 case ZFS_SMB_ACL_ADD: 3860 case ZFS_SMB_ACL_REMOVE: 3861 (void) strlcpy(zc.zc_string, resource1, sizeof (zc.zc_string)); 3862 break; 3863 case ZFS_SMB_ACL_RENAME: 3864 if (nvlist_add_string(nvlist, ZFS_SMB_ACL_SRC, 3865 resource1) != 0) { 3866 (void) no_memory(hdl); 3867 return (-1); 3868 } 3869 if (nvlist_add_string(nvlist, ZFS_SMB_ACL_TARGET, 3870 resource2) != 0) { 3871 (void) no_memory(hdl); 3872 return (-1); 3873 } 3874 if (zcmd_write_src_nvlist(hdl, &zc, nvlist) != 0) { 3875 nvlist_free(nvlist); 3876 return (-1); 3877 } 3878 break; 3879 case ZFS_SMB_ACL_PURGE: 3880 break; 3881 default: 3882 return (-1); 3883 } 3884 error = ioctl(hdl->libzfs_fd, ZFS_IOC_SMB_ACL, &zc); 3885 if (nvlist) 3886 nvlist_free(nvlist); 3887 return (error); 3888 } 3889 3890 int 3891 zfs_smb_acl_add(libzfs_handle_t *hdl, char *dataset, 3892 char *path, char *resource) 3893 { 3894 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_ADD, 3895 resource, NULL)); 3896 } 3897 3898 int 3899 zfs_smb_acl_remove(libzfs_handle_t *hdl, char *dataset, 3900 char *path, char *resource) 3901 { 3902 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_REMOVE, 3903 resource, NULL)); 3904 } 3905 3906 int 3907 zfs_smb_acl_purge(libzfs_handle_t *hdl, char *dataset, char *path) 3908 { 3909 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_PURGE, 3910 NULL, NULL)); 3911 } 3912 3913 int 3914 zfs_smb_acl_rename(libzfs_handle_t *hdl, char *dataset, char *path, 3915 char *oldname, char *newname) 3916 { 3917 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_RENAME, 3918 oldname, newname)); 3919 } 3920 3921 int 3922 zfs_userspace(zfs_handle_t *zhp, zfs_userquota_prop_t type, 3923 zfs_userspace_cb_t func, void *arg) 3924 { 3925 zfs_cmd_t zc = { 0 }; 3926 int error; 3927 zfs_useracct_t buf[100]; 3928 3929 (void) strncpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 3930 3931 zc.zc_objset_type = type; 3932 zc.zc_nvlist_dst = (uintptr_t)buf; 3933 3934 /* CONSTCOND */ 3935 while (1) { 3936 zfs_useracct_t *zua = buf; 3937 3938 zc.zc_nvlist_dst_size = sizeof (buf); 3939 error = ioctl(zhp->zfs_hdl->libzfs_fd, 3940 ZFS_IOC_USERSPACE_MANY, &zc); 3941 if (error || zc.zc_nvlist_dst_size == 0) 3942 break; 3943 3944 while (zc.zc_nvlist_dst_size > 0) { 3945 error = func(arg, zua->zu_domain, zua->zu_rid, 3946 zua->zu_space); 3947 if (error != 0) 3948 return (error); 3949 zua++; 3950 zc.zc_nvlist_dst_size -= sizeof (zfs_useracct_t); 3951 } 3952 } 3953 3954 return (error); 3955 } 3956 3957 int 3958 zfs_hold(zfs_handle_t *zhp, const char *snapname, const char *tag, 3959 boolean_t recursive, boolean_t temphold, boolean_t enoent_ok) 3960 { 3961 zfs_cmd_t zc = { 0 }; 3962 libzfs_handle_t *hdl = zhp->zfs_hdl; 3963 3964 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 3965 (void) strlcpy(zc.zc_value, snapname, sizeof (zc.zc_value)); 3966 if (strlcpy(zc.zc_string, tag, sizeof (zc.zc_string)) 3967 >= sizeof (zc.zc_string)) 3968 return (zfs_error(hdl, EZFS_TAGTOOLONG, tag)); 3969 zc.zc_cookie = recursive; 3970 zc.zc_temphold = temphold; 3971 3972 if (zfs_ioctl(hdl, ZFS_IOC_HOLD, &zc) != 0) { 3973 char errbuf[ZFS_MAXNAMELEN+32]; 3974 3975 /* 3976 * if it was recursive, the one that actually failed will be in 3977 * zc.zc_name. 3978 */ 3979 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 3980 "cannot hold '%s@%s'"), zc.zc_name, snapname); 3981 switch (errno) { 3982 case E2BIG: 3983 /* 3984 * Temporary tags wind up having the ds object id 3985 * prepended. So even if we passed the length check 3986 * above, it's still possible for the tag to wind 3987 * up being slightly too long. 3988 */ 3989 return (zfs_error(hdl, EZFS_TAGTOOLONG, errbuf)); 3990 case ENOTSUP: 3991 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 3992 "pool must be upgraded")); 3993 return (zfs_error(hdl, EZFS_BADVERSION, errbuf)); 3994 case EINVAL: 3995 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 3996 case EEXIST: 3997 return (zfs_error(hdl, EZFS_REFTAG_HOLD, errbuf)); 3998 case ENOENT: 3999 if (enoent_ok) 4000 return (0); 4001 /* FALLTHROUGH */ 4002 default: 4003 return (zfs_standard_error_fmt(hdl, errno, errbuf)); 4004 } 4005 } 4006 4007 return (0); 4008 } 4009 4010 struct hold_range_arg { 4011 zfs_handle_t *origin; 4012 const char *fromsnap; 4013 const char *tosnap; 4014 char lastsnapheld[ZFS_MAXNAMELEN]; 4015 const char *tag; 4016 boolean_t temphold; 4017 boolean_t seento; 4018 boolean_t seenfrom; 4019 boolean_t holding; 4020 boolean_t recursive; 4021 }; 4022 4023 static int 4024 zfs_hold_range_one(zfs_handle_t *zhp, void *arg) 4025 { 4026 struct hold_range_arg *hra = arg; 4027 const char *thissnap; 4028 int error; 4029 4030 thissnap = strchr(zfs_get_name(zhp), '@') + 1; 4031 4032 if (hra->fromsnap && !hra->seenfrom && 4033 strcmp(hra->fromsnap, thissnap) == 0) 4034 hra->seenfrom = B_TRUE; 4035 4036 /* snap is older or newer than the desired range, ignore it */ 4037 if (hra->seento || !hra->seenfrom) { 4038 zfs_close(zhp); 4039 return (0); 4040 } 4041 4042 if (hra->holding) { 4043 /* We could be racing with destroy, so ignore ENOENT. */ 4044 error = zfs_hold(hra->origin, thissnap, hra->tag, 4045 hra->recursive, hra->temphold, B_TRUE); 4046 if (error == 0) { 4047 (void) strlcpy(hra->lastsnapheld, zfs_get_name(zhp), 4048 sizeof (hra->lastsnapheld)); 4049 } 4050 } else { 4051 error = zfs_release(hra->origin, thissnap, hra->tag, 4052 hra->recursive); 4053 } 4054 4055 if (!hra->seento && strcmp(hra->tosnap, thissnap) == 0) 4056 hra->seento = B_TRUE; 4057 4058 zfs_close(zhp); 4059 return (error); 4060 } 4061 4062 /* 4063 * Add a user hold on the set of snapshots starting with fromsnap up to 4064 * and including tosnap. If we're unable to to acquire a particular hold, 4065 * undo any holds up to that point. 4066 */ 4067 int 4068 zfs_hold_range(zfs_handle_t *zhp, const char *fromsnap, const char *tosnap, 4069 const char *tag, boolean_t recursive, boolean_t temphold) 4070 { 4071 struct hold_range_arg arg = { 0 }; 4072 int error; 4073 4074 arg.origin = zhp; 4075 arg.fromsnap = fromsnap; 4076 arg.tosnap = tosnap; 4077 arg.tag = tag; 4078 arg.temphold = temphold; 4079 arg.holding = B_TRUE; 4080 arg.recursive = recursive; 4081 arg.seenfrom = (fromsnap == NULL); 4082 4083 error = zfs_iter_snapshots_sorted(zhp, zfs_hold_range_one, &arg); 4084 4085 /* 4086 * Make sure we either hold the entire range or none. 4087 */ 4088 if (error && arg.lastsnapheld[0] != '\0') { 4089 (void) zfs_release_range(zhp, fromsnap, 4090 (const char *)arg.lastsnapheld, tag, recursive); 4091 } 4092 return (error); 4093 } 4094 4095 int 4096 zfs_release(zfs_handle_t *zhp, const char *snapname, const char *tag, 4097 boolean_t recursive) 4098 { 4099 zfs_cmd_t zc = { 0 }; 4100 libzfs_handle_t *hdl = zhp->zfs_hdl; 4101 4102 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name)); 4103 (void) strlcpy(zc.zc_value, snapname, sizeof (zc.zc_value)); 4104 if (strlcpy(zc.zc_string, tag, sizeof (zc.zc_string)) 4105 >= sizeof (zc.zc_string)) 4106 return (zfs_error(hdl, EZFS_TAGTOOLONG, tag)); 4107 zc.zc_cookie = recursive; 4108 4109 if (zfs_ioctl(hdl, ZFS_IOC_RELEASE, &zc) != 0) { 4110 char errbuf[ZFS_MAXNAMELEN+32]; 4111 4112 /* 4113 * if it was recursive, the one that actually failed will be in 4114 * zc.zc_name. 4115 */ 4116 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN, 4117 "cannot release '%s' from '%s@%s'"), tag, zc.zc_name, 4118 snapname); 4119 switch (errno) { 4120 case ESRCH: 4121 return (zfs_error(hdl, EZFS_REFTAG_RELE, errbuf)); 4122 case ENOTSUP: 4123 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN, 4124 "pool must be upgraded")); 4125 return (zfs_error(hdl, EZFS_BADVERSION, errbuf)); 4126 case EINVAL: 4127 return (zfs_error(hdl, EZFS_BADTYPE, errbuf)); 4128 default: 4129 return (zfs_standard_error_fmt(hdl, errno, errbuf)); 4130 } 4131 } 4132 4133 return (0); 4134 } 4135 4136 /* 4137 * Release a user hold from the set of snapshots starting with fromsnap 4138 * up to and including tosnap. 4139 */ 4140 int 4141 zfs_release_range(zfs_handle_t *zhp, const char *fromsnap, const char *tosnap, 4142 const char *tag, boolean_t recursive) 4143 { 4144 struct hold_range_arg arg = { 0 }; 4145 4146 arg.origin = zhp; 4147 arg.fromsnap = fromsnap; 4148 arg.tosnap = tosnap; 4149 arg.tag = tag; 4150 arg.recursive = recursive; 4151 arg.seenfrom = (fromsnap == NULL); 4152 4153 return (zfs_iter_snapshots_sorted(zhp, zfs_hold_range_one, &arg)); 4154 } 4155 4156 uint64_t 4157 zvol_volsize_to_reservation(uint64_t volsize, nvlist_t *props) 4158 { 4159 uint64_t numdb; 4160 uint64_t nblocks, volblocksize; 4161 int ncopies; 4162 char *strval; 4163 4164 if (nvlist_lookup_string(props, 4165 zfs_prop_to_name(ZFS_PROP_COPIES), &strval) == 0) 4166 ncopies = atoi(strval); 4167 else 4168 ncopies = 1; 4169 if (nvlist_lookup_uint64(props, 4170 zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE), 4171 &volblocksize) != 0) 4172 volblocksize = ZVOL_DEFAULT_BLOCKSIZE; 4173 nblocks = volsize/volblocksize; 4174 /* start with metadnode L0-L6 */ 4175 numdb = 7; 4176 /* calculate number of indirects */ 4177 while (nblocks > 1) { 4178 nblocks += DNODES_PER_LEVEL - 1; 4179 nblocks /= DNODES_PER_LEVEL; 4180 numdb += nblocks; 4181 } 4182 numdb *= MIN(SPA_DVAS_PER_BP, ncopies + 1); 4183 volsize *= ncopies; 4184 /* 4185 * this is exactly DN_MAX_INDBLKSHIFT when metadata isn't 4186 * compressed, but in practice they compress down to about 4187 * 1100 bytes 4188 */ 4189 numdb *= 1ULL << DN_MAX_INDBLKSHIFT; 4190 volsize += numdb; 4191 return (volsize); 4192 } 4193
Indexes created Sun Mar 15 00:25:29 UTC 2026