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