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