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