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 return (ret);
3419 }
3420
3421 /*
3422 * Clones the given dataset. The target must be of the same type as the source.
3423 */
3424 int
3425 zfs_clone(zfs_handle_t *zhp, const char *target, nvlist_t *props)
3426 {
3427 char parent[ZFS_MAXNAMELEN];
3428 int ret;
3429 char errbuf[1024];
3430 libzfs_handle_t *hdl = zhp->zfs_hdl;
3431 uint64_t zoned;
3432
3433 assert(zhp->zfs_type == ZFS_TYPE_SNAPSHOT);
3434
3435 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3436 "cannot create '%s'"), target);
3437
3438 /* validate the target/clone name */
3439 if (!zfs_validate_name(hdl, target, ZFS_TYPE_FILESYSTEM, B_TRUE))
3440 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3441
3442 /* validate parents exist */
3443 if (check_parents(hdl, target, &zoned, B_FALSE, NULL) != 0)
3444 return (-1);
3445
3446 (void) parent_name(target, parent, sizeof (parent));
3447
3448 /* do the clone */
3449
3450 if (props) {
3451 zfs_type_t type;
3452 if (ZFS_IS_VOLUME(zhp)) {
3453 type = ZFS_TYPE_VOLUME;
3454 } else {
3455 type = ZFS_TYPE_FILESYSTEM;
3456 }
3457 if ((props = zfs_valid_proplist(hdl, type, props, zoned,
3458 zhp, errbuf)) == NULL)
3459 return (-1);
3460 }
3461
3462 ret = lzc_clone(target, zhp->zfs_name, props);
3463 nvlist_free(props);
3464
3465 if (ret != 0) {
3466 switch (errno) {
3467
3468 case ENOENT:
3469 /*
3470 * The parent doesn't exist. We should have caught this
3471 * above, but there may a race condition that has since
3472 * destroyed the parent.
3473 *
3474 * At this point, we don't know whether it's the source
3475 * that doesn't exist anymore, or whether the target
3476 * dataset doesn't exist.
3477 */
3478 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
3479 "no such parent '%s'"), parent);
3480 return (zfs_error(zhp->zfs_hdl, EZFS_NOENT, errbuf));
3481
3482 case EXDEV:
3483 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
3484 "source and target pools differ"));
3485 return (zfs_error(zhp->zfs_hdl, EZFS_CROSSTARGET,
3486 errbuf));
3487
3488 default:
3489 return (zfs_standard_error(zhp->zfs_hdl, errno,
3490 errbuf));
3491 }
3492 }
3493
3494 return (ret);
3495 }
3496
3497 /*
3498 * Promotes the given clone fs to be the clone parent.
3499 */
3500 int
3501 zfs_promote(zfs_handle_t *zhp)
3502 {
3503 libzfs_handle_t *hdl = zhp->zfs_hdl;
3504 zfs_cmd_t zc = { 0 };
3505 char parent[MAXPATHLEN];
3506 int ret;
3507 char errbuf[1024];
3508
3509 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3510 "cannot promote '%s'"), zhp->zfs_name);
3511
3512 if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) {
3513 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3514 "snapshots can not be promoted"));
3515 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
3516 }
3517
3518 (void) strlcpy(parent, zhp->zfs_dmustats.dds_origin, sizeof (parent));
3519 if (parent[0] == '\0') {
3520 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3521 "not a cloned filesystem"));
3522 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
3523 }
3524
3525 (void) strlcpy(zc.zc_value, zhp->zfs_dmustats.dds_origin,
3526 sizeof (zc.zc_value));
3527 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
3528 ret = zfs_ioctl(hdl, ZFS_IOC_PROMOTE, &zc);
3529
3530 if (ret != 0) {
3531 int save_errno = errno;
3532
3533 switch (save_errno) {
3534 case EEXIST:
3535 /* There is a conflicting snapshot name. */
3536 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3537 "conflicting snapshot '%s' from parent '%s'"),
3538 zc.zc_string, parent);
3539 return (zfs_error(hdl, EZFS_EXISTS, errbuf));
3540
3541 default:
3542 return (zfs_standard_error(hdl, save_errno, errbuf));
3543 }
3544 }
3545 return (ret);
3546 }
3547
3548 typedef struct snapdata {
3549 nvlist_t *sd_nvl;
3550 const char *sd_snapname;
3551 } snapdata_t;
3552
3553 static int
3554 zfs_snapshot_cb(zfs_handle_t *zhp, void *arg)
3555 {
3556 snapdata_t *sd = arg;
3557 char name[ZFS_MAXNAMELEN];
3558 int rv = 0;
3559
3560 if (zfs_prop_get_int(zhp, ZFS_PROP_INCONSISTENT) == 0) {
3561 (void) snprintf(name, sizeof (name),
3562 "%s@%s", zfs_get_name(zhp), sd->sd_snapname);
3563
3564 fnvlist_add_boolean(sd->sd_nvl, name);
3565
3566 rv = zfs_iter_filesystems(zhp, zfs_snapshot_cb, sd);
3567 }
3568 zfs_close(zhp);
3569
3570 return (rv);
3571 }
3572
3573 /*
3574 * Creates snapshots. The keys in the snaps nvlist are the snapshots to be
3575 * created.
3576 */
3577 int
3578 zfs_snapshot_nvl(libzfs_handle_t *hdl, nvlist_t *snaps, nvlist_t *props)
3579 {
3580 int ret;
3581 char errbuf[1024];
3582 nvpair_t *elem;
3583 nvlist_t *errors;
3584
3585 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3586 "cannot create snapshots "));
3587
3588 elem = NULL;
3589 while ((elem = nvlist_next_nvpair(snaps, elem)) != NULL) {
3590 const char *snapname = nvpair_name(elem);
3591
3592 /* validate the target name */
3593 if (!zfs_validate_name(hdl, snapname, ZFS_TYPE_SNAPSHOT,
3594 B_TRUE)) {
3595 (void) snprintf(errbuf, sizeof (errbuf),
3596 dgettext(TEXT_DOMAIN,
3597 "cannot create snapshot '%s'"), snapname);
3598 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3599 }
3600 }
3601
3602 if (props != NULL &&
3603 (props = zfs_valid_proplist(hdl, ZFS_TYPE_SNAPSHOT,
3604 props, B_FALSE, NULL, errbuf)) == NULL) {
3605 return (-1);
3606 }
3607
3608 ret = lzc_snapshot(snaps, props, &errors);
3609
3610 if (ret != 0) {
3611 boolean_t printed = B_FALSE;
3612 for (elem = nvlist_next_nvpair(errors, NULL);
3613 elem != NULL;
3614 elem = nvlist_next_nvpair(errors, elem)) {
3615 (void) snprintf(errbuf, sizeof (errbuf),
3616 dgettext(TEXT_DOMAIN,
3617 "cannot create snapshot '%s'"), nvpair_name(elem));
3618 (void) zfs_standard_error(hdl,
3619 fnvpair_value_int32(elem), errbuf);
3620 printed = B_TRUE;
3621 }
3622 if (!printed) {
3623 switch (ret) {
3624 case EXDEV:
3625 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3626 "multiple snapshots of same "
3627 "fs not allowed"));
3628 (void) zfs_error(hdl, EZFS_EXISTS, errbuf);
3629
3630 break;
3631 default:
3632 (void) zfs_standard_error(hdl, ret, errbuf);
3633 }
3634 }
3635 }
3636
3637 nvlist_free(props);
3638 nvlist_free(errors);
3639 return (ret);
3640 }
3641
3642 int
3643 zfs_snapshot(libzfs_handle_t *hdl, const char *path, boolean_t recursive,
3644 nvlist_t *props)
3645 {
3646 int ret;
3647 snapdata_t sd = { 0 };
3648 char fsname[ZFS_MAXNAMELEN];
3649 char *cp;
3650 zfs_handle_t *zhp;
3651 char errbuf[1024];
3652
3653 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3654 "cannot snapshot %s"), path);
3655
3656 if (!zfs_validate_name(hdl, path, ZFS_TYPE_SNAPSHOT, B_TRUE))
3657 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3658
3659 (void) strlcpy(fsname, path, sizeof (fsname));
3660 cp = strchr(fsname, '@');
3661 *cp = '\0';
3662 sd.sd_snapname = cp + 1;
3663
3664 if ((zhp = zfs_open(hdl, fsname, ZFS_TYPE_FILESYSTEM |
3665 ZFS_TYPE_VOLUME)) == NULL) {
3666 return (-1);
3667 }
3668
3669 verify(nvlist_alloc(&sd.sd_nvl, NV_UNIQUE_NAME, 0) == 0);
3670 if (recursive) {
3671 (void) zfs_snapshot_cb(zfs_handle_dup(zhp), &sd);
3672 } else {
3673 fnvlist_add_boolean(sd.sd_nvl, path);
3674 }
3675
3676 ret = zfs_snapshot_nvl(hdl, sd.sd_nvl, props);
3677 nvlist_free(sd.sd_nvl);
3678 zfs_close(zhp);
3679 return (ret);
3680 }
3681
3682 /*
3683 * Destroy any more recent snapshots. We invoke this callback on any dependents
3684 * of the snapshot first. If the 'cb_dependent' member is non-zero, then this
3685 * is a dependent and we should just destroy it without checking the transaction
3686 * group.
3687 */
3688 typedef struct rollback_data {
3689 const char *cb_target; /* the snapshot */
3690 uint64_t cb_create; /* creation time reference */
3691 boolean_t cb_error;
3692 boolean_t cb_force;
3693 } rollback_data_t;
3694
3695 static int
3696 rollback_destroy_dependent(zfs_handle_t *zhp, void *data)
3697 {
3698 rollback_data_t *cbp = data;
3699 prop_changelist_t *clp;
3700
3701 /* We must destroy this clone; first unmount it */
3702 clp = changelist_gather(zhp, ZFS_PROP_NAME, 0,
3703 cbp->cb_force ? MS_FORCE: 0);
3704 if (clp == NULL || changelist_prefix(clp) != 0) {
3705 cbp->cb_error = B_TRUE;
3706 zfs_close(zhp);
3707 return (0);
3708 }
3709 if (zfs_destroy(zhp, B_FALSE) != 0)
3710 cbp->cb_error = B_TRUE;
3711 else
3712 changelist_remove(clp, zhp->zfs_name);
3713 (void) changelist_postfix(clp);
3714 changelist_free(clp);
3715
3716 zfs_close(zhp);
3717 return (0);
3718 }
3719
3720 static int
3721 rollback_destroy(zfs_handle_t *zhp, void *data)
3722 {
3723 rollback_data_t *cbp = data;
3724
3725 if (zfs_prop_get_int(zhp, ZFS_PROP_CREATETXG) > cbp->cb_create) {
3726 cbp->cb_error |= zfs_iter_dependents(zhp, B_FALSE,
3727 rollback_destroy_dependent, cbp);
3728
3729 cbp->cb_error |= zfs_destroy(zhp, B_FALSE);
3730 }
3731
3732 zfs_close(zhp);
3733 return (0);
3734 }
3735
3736 /*
3737 * Given a dataset, rollback to a specific snapshot, discarding any
3738 * data changes since then and making it the active dataset.
3739 *
3740 * Any snapshots and bookmarks more recent than the target are
3741 * destroyed, along with their dependents (i.e. clones).
3742 */
3743 int
3744 zfs_rollback(zfs_handle_t *zhp, zfs_handle_t *snap, boolean_t force)
3745 {
3746 rollback_data_t cb = { 0 };
3747 int err;
3748 boolean_t restore_resv = 0;
3749 uint64_t old_volsize, new_volsize;
3750 zfs_prop_t resv_prop;
3751
3752 assert(zhp->zfs_type == ZFS_TYPE_FILESYSTEM ||
3753 zhp->zfs_type == ZFS_TYPE_VOLUME);
3754
3755 /*
3756 * Destroy all recent snapshots and their dependents.
3757 */
3758 cb.cb_force = force;
3759 cb.cb_target = snap->zfs_name;
3760 cb.cb_create = zfs_prop_get_int(snap, ZFS_PROP_CREATETXG);
3761 (void) zfs_iter_snapshots(zhp, rollback_destroy, &cb);
3762 (void) zfs_iter_bookmarks(zhp, rollback_destroy, &cb);
3763
3764 if (cb.cb_error)
3765 return (-1);
3766
3767 /*
3768 * Now that we have verified that the snapshot is the latest,
3769 * rollback to the given snapshot.
3770 */
3771
3772 if (zhp->zfs_type == ZFS_TYPE_VOLUME) {
3773 if (zfs_which_resv_prop(zhp, &resv_prop) < 0)
3774 return (-1);
3775 old_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE);
3776 restore_resv =
3777 (old_volsize == zfs_prop_get_int(zhp, resv_prop));
3778 }
3779
3780 /*
3781 * We rely on zfs_iter_children() to verify that there are no
3782 * newer snapshots for the given dataset. Therefore, we can
3783 * simply pass the name on to the ioctl() call. There is still
3784 * an unlikely race condition where the user has taken a
3785 * snapshot since we verified that this was the most recent.
3786 */
3787 err = lzc_rollback(zhp->zfs_name, NULL, 0);
3788 if (err != 0) {
3789 (void) zfs_standard_error_fmt(zhp->zfs_hdl, errno,
3790 dgettext(TEXT_DOMAIN, "cannot rollback '%s'"),
3791 zhp->zfs_name);
3792 return (err);
3793 }
3794
3795 /*
3796 * For volumes, if the pre-rollback volsize matched the pre-
3797 * rollback reservation and the volsize has changed then set
3798 * the reservation property to the post-rollback volsize.
3799 * Make a new handle since the rollback closed the dataset.
3800 */
3801 if ((zhp->zfs_type == ZFS_TYPE_VOLUME) &&
3802 (zhp = make_dataset_handle(zhp->zfs_hdl, zhp->zfs_name))) {
3803 if (restore_resv) {
3804 new_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE);
3805 if (old_volsize != new_volsize)
3806 err = zfs_prop_set_int(zhp, resv_prop,
3807 new_volsize);
3808 }
3809 zfs_close(zhp);
3810 }
3811 return (err);
3812 }
3813
3814 /*
3815 * Renames the given dataset.
3816 */
3817 int
3818 zfs_rename(zfs_handle_t *zhp, const char *target, boolean_t recursive,
3819 boolean_t force_unmount)
3820 {
3821 int ret;
3822 zfs_cmd_t zc = { 0 };
3823 char *delim;
3824 prop_changelist_t *cl = NULL;
3825 zfs_handle_t *zhrp = NULL;
3826 char *parentname = NULL;
3827 char parent[ZFS_MAXNAMELEN];
3828 libzfs_handle_t *hdl = zhp->zfs_hdl;
3829 char errbuf[1024];
3830
3831 /* if we have the same exact name, just return success */
3832 if (strcmp(zhp->zfs_name, target) == 0)
3833 return (0);
3834
3835 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3836 "cannot rename to '%s'"), target);
3837
3838 /*
3839 * Make sure the target name is valid
3840 */
3841 if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) {
3842 if ((strchr(target, '@') == NULL) ||
3843 *target == '@') {
3844 /*
3845 * Snapshot target name is abbreviated,
3846 * reconstruct full dataset name
3847 */
3848 (void) strlcpy(parent, zhp->zfs_name,
3849 sizeof (parent));
3850 delim = strchr(parent, '@');
3851 if (strchr(target, '@') == NULL)
3852 *(++delim) = '\0';
3853 else
3854 *delim = '\0';
3855 (void) strlcat(parent, target, sizeof (parent));
3856 target = parent;
3857 } else {
3858 /*
3859 * Make sure we're renaming within the same dataset.
3860 */
3861 delim = strchr(target, '@');
3862 if (strncmp(zhp->zfs_name, target, delim - target)
3863 != 0 || zhp->zfs_name[delim - target] != '@') {
3864 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3865 "snapshots must be part of same "
3866 "dataset"));
3867 return (zfs_error(hdl, EZFS_CROSSTARGET,
3868 errbuf));
3869 }
3870 }
3871 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE))
3872 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3873 } else {
3874 if (recursive) {
3875 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3876 "recursive rename must be a snapshot"));
3877 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
3878 }
3879
3880 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE))
3881 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3882
3883 /* validate parents */
3884 if (check_parents(hdl, target, NULL, B_FALSE, NULL) != 0)
3885 return (-1);
3886
3887 /* make sure we're in the same pool */
3888 verify((delim = strchr(target, '/')) != NULL);
3889 if (strncmp(zhp->zfs_name, target, delim - target) != 0 ||
3890 zhp->zfs_name[delim - target] != '/') {
3891 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3892 "datasets must be within same pool"));
3893 return (zfs_error(hdl, EZFS_CROSSTARGET, errbuf));
3894 }
3895
3896 /* new name cannot be a child of the current dataset name */
3897 if (is_descendant(zhp->zfs_name, target)) {
3898 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3899 "New dataset name cannot be a descendant of "
3900 "current dataset name"));
3901 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3902 }
3903 }
3904
3905 (void) snprintf(errbuf, sizeof (errbuf),
3906 dgettext(TEXT_DOMAIN, "cannot rename '%s'"), zhp->zfs_name);
3907
3908 if (getzoneid() == GLOBAL_ZONEID &&
3909 zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) {
3910 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3911 "dataset is used in a non-global zone"));
3912 return (zfs_error(hdl, EZFS_ZONED, errbuf));
3913 }
3914
3915 if (recursive) {
3916 parentname = zfs_strdup(zhp->zfs_hdl, zhp->zfs_name);
3917 if (parentname == NULL) {
3918 ret = -1;
3919 goto error;
3920 }
3921 delim = strchr(parentname, '@');
3922 *delim = '\0';
3923 zhrp = zfs_open(zhp->zfs_hdl, parentname, ZFS_TYPE_DATASET);
3924 if (zhrp == NULL) {
3925 ret = -1;
3926 goto error;
3927 }
3928 } else if (zhp->zfs_type != ZFS_TYPE_SNAPSHOT) {
3929 if ((cl = changelist_gather(zhp, ZFS_PROP_NAME, 0,
3930 force_unmount ? MS_FORCE : 0)) == NULL)
3931 return (-1);
3932
3933 if (changelist_haszonedchild(cl)) {
3934 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3935 "child dataset with inherited mountpoint is used "
3936 "in a non-global zone"));
3937 (void) zfs_error(hdl, EZFS_ZONED, errbuf);
3938 goto error;
3939 }
3940
3941 if ((ret = changelist_prefix(cl)) != 0)
3942 goto error;
3943 }
3944
3945 if (ZFS_IS_VOLUME(zhp))
3946 zc.zc_objset_type = DMU_OST_ZVOL;
3947 else
3948 zc.zc_objset_type = DMU_OST_ZFS;
3949
3950 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
3951 (void) strlcpy(zc.zc_value, target, sizeof (zc.zc_value));
3952
3953 zc.zc_cookie = recursive;
3954
3955 if ((ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_RENAME, &zc)) != 0) {
3956 /*
3957 * if it was recursive, the one that actually failed will
3958 * be in zc.zc_name
3959 */
3960 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3961 "cannot rename '%s'"), zc.zc_name);
3962
3963 if (recursive && errno == EEXIST) {
3964 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3965 "a child dataset already has a snapshot "
3966 "with the new name"));
3967 (void) zfs_error(hdl, EZFS_EXISTS, errbuf);
3968 } else {
3969 (void) zfs_standard_error(zhp->zfs_hdl, errno, errbuf);
3970 }
3971
3972 /*
3973 * On failure, we still want to remount any filesystems that
3974 * were previously mounted, so we don't alter the system state.
3975 */
3976 if (cl != NULL)
3977 (void) changelist_postfix(cl);
3978 } else {
3979 if (cl != NULL) {
3980 changelist_rename(cl, zfs_get_name(zhp), target);
3981 ret = changelist_postfix(cl);
3982 }
3983 }
3984
3985 error:
3986 if (parentname != NULL) {
3987 free(parentname);
3988 }
3989 if (zhrp != NULL) {
3990 zfs_close(zhrp);
3991 }
3992 if (cl != NULL) {
3993 changelist_free(cl);
3994 }
3995 return (ret);
3996 }
3997
3998 nvlist_t *
3999 zfs_get_user_props(zfs_handle_t *zhp)
4000 {
4001 return (zhp->zfs_user_props);
4002 }
4003
4004 nvlist_t *
4005 zfs_get_recvd_props(zfs_handle_t *zhp)
4006 {
4007 if (zhp->zfs_recvd_props == NULL)
4008 if (get_recvd_props_ioctl(zhp) != 0)
4009 return (NULL);
4010 return (zhp->zfs_recvd_props);
4011 }
4012
4013 /*
4014 * This function is used by 'zfs list' to determine the exact set of columns to
4015 * display, and their maximum widths. This does two main things:
4016 *
4017 * - If this is a list of all properties, then expand the list to include
4018 * all native properties, and set a flag so that for each dataset we look
4019 * for new unique user properties and add them to the list.
4020 *
4021 * - For non fixed-width properties, keep track of the maximum width seen
4022 * so that we can size the column appropriately. If the user has
4023 * requested received property values, we also need to compute the width
4024 * of the RECEIVED column.
4025 */
4026 int
4027 zfs_expand_proplist(zfs_handle_t *zhp, zprop_list_t **plp, boolean_t received,
4028 boolean_t literal)
4029 {
4030 libzfs_handle_t *hdl = zhp->zfs_hdl;
4031 zprop_list_t *entry;
4032 zprop_list_t **last, **start;
4033 nvlist_t *userprops, *propval;
4034 nvpair_t *elem;
4035 char *strval;
4036 char buf[ZFS_MAXPROPLEN];
4037
4038 if (zprop_expand_list(hdl, plp, ZFS_TYPE_DATASET) != 0)
4039 return (-1);
4040
4041 userprops = zfs_get_user_props(zhp);
4042
4043 entry = *plp;
4044 if (entry->pl_all && nvlist_next_nvpair(userprops, NULL) != NULL) {
4045 /*
4046 * Go through and add any user properties as necessary. We
4047 * start by incrementing our list pointer to the first
4048 * non-native property.
4049 */
4050 start = plp;
4051 while (*start != NULL) {
4052 if ((*start)->pl_prop == ZPROP_INVAL)
4053 break;
4054 start = &(*start)->pl_next;
4055 }
4056
4057 elem = NULL;
4058 while ((elem = nvlist_next_nvpair(userprops, elem)) != NULL) {
4059 /*
4060 * See if we've already found this property in our list.
4061 */
4062 for (last = start; *last != NULL;
4063 last = &(*last)->pl_next) {
4064 if (strcmp((*last)->pl_user_prop,
4065 nvpair_name(elem)) == 0)
4066 break;
4067 }
4068
4069 if (*last == NULL) {
4070 if ((entry = zfs_alloc(hdl,
4071 sizeof (zprop_list_t))) == NULL ||
4072 ((entry->pl_user_prop = zfs_strdup(hdl,
4073 nvpair_name(elem)))) == NULL) {
4074 free(entry);
4075 return (-1);
4076 }
4077
4078 entry->pl_prop = ZPROP_INVAL;
4079 entry->pl_width = strlen(nvpair_name(elem));
4080 entry->pl_all = B_TRUE;
4081 *last = entry;
4082 }
4083 }
4084 }
4085
4086 /*
4087 * Now go through and check the width of any non-fixed columns
4088 */
4089 for (entry = *plp; entry != NULL; entry = entry->pl_next) {
4090 if (entry->pl_fixed && !literal)
4091 continue;
4092
4093 if (entry->pl_prop != ZPROP_INVAL) {
4094 if (zfs_prop_get(zhp, entry->pl_prop,
4095 buf, sizeof (buf), NULL, NULL, 0, literal) == 0) {
4096 if (strlen(buf) > entry->pl_width)
4097 entry->pl_width = strlen(buf);
4098 }
4099 if (received && zfs_prop_get_recvd(zhp,
4100 zfs_prop_to_name(entry->pl_prop),
4101 buf, sizeof (buf), literal) == 0)
4102 if (strlen(buf) > entry->pl_recvd_width)
4103 entry->pl_recvd_width = strlen(buf);
4104 } else {
4105 if (nvlist_lookup_nvlist(userprops, entry->pl_user_prop,
4106 &propval) == 0) {
4107 verify(nvlist_lookup_string(propval,
4108 ZPROP_VALUE, &strval) == 0);
4109 if (strlen(strval) > entry->pl_width)
4110 entry->pl_width = strlen(strval);
4111 }
4112 if (received && zfs_prop_get_recvd(zhp,
4113 entry->pl_user_prop,
4114 buf, sizeof (buf), literal) == 0)
4115 if (strlen(buf) > entry->pl_recvd_width)
4116 entry->pl_recvd_width = strlen(buf);
4117 }
4118 }
4119
4120 return (0);
4121 }
4122
4123 int
4124 zfs_deleg_share_nfs(libzfs_handle_t *hdl, char *dataset, char *path,
4125 char *resource, void *export, void *sharetab,
4126 int sharemax, zfs_share_op_t operation)
4127 {
4128 zfs_cmd_t zc = { 0 };
4129 int error;
4130
4131 (void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name));
4132 (void) strlcpy(zc.zc_value, path, sizeof (zc.zc_value));
4133 if (resource)
4134 (void) strlcpy(zc.zc_string, resource, sizeof (zc.zc_string));
4135 zc.zc_share.z_sharedata = (uint64_t)(uintptr_t)sharetab;
4136 zc.zc_share.z_exportdata = (uint64_t)(uintptr_t)export;
4137 zc.zc_share.z_sharetype = operation;
4138 zc.zc_share.z_sharemax = sharemax;
4139 error = ioctl(hdl->libzfs_fd, ZFS_IOC_SHARE, &zc);
4140 return (error);
4141 }
4142
4143 void
4144 zfs_prune_proplist(zfs_handle_t *zhp, uint8_t *props)
4145 {
4146 nvpair_t *curr;
4147
4148 /*
4149 * Keep a reference to the props-table against which we prune the
4150 * properties.
4151 */
4152 zhp->zfs_props_table = props;
4153
4154 curr = nvlist_next_nvpair(zhp->zfs_props, NULL);
4155
4156 while (curr) {
4157 zfs_prop_t zfs_prop = zfs_name_to_prop(nvpair_name(curr));
4158 nvpair_t *next = nvlist_next_nvpair(zhp->zfs_props, curr);
4159
4160 /*
4161 * User properties will result in ZPROP_INVAL, and since we
4162 * only know how to prune standard ZFS properties, we always
4163 * leave these in the list. This can also happen if we
4164 * encounter an unknown DSL property (when running older
4165 * software, for example).
4166 */
4167 if (zfs_prop != ZPROP_INVAL && props[zfs_prop] == B_FALSE)
4168 (void) nvlist_remove(zhp->zfs_props,
4169 nvpair_name(curr), nvpair_type(curr));
4170 curr = next;
4171 }
4172 }
4173
4174 static int
4175 zfs_smb_acl_mgmt(libzfs_handle_t *hdl, char *dataset, char *path,
4176 zfs_smb_acl_op_t cmd, char *resource1, char *resource2)
4177 {
4178 zfs_cmd_t zc = { 0 };
4179 nvlist_t *nvlist = NULL;
4180 int error;
4181
4182 (void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name));
4183 (void) strlcpy(zc.zc_value, path, sizeof (zc.zc_value));
4184 zc.zc_cookie = (uint64_t)cmd;
4185
4186 if (cmd == ZFS_SMB_ACL_RENAME) {
4187 if (nvlist_alloc(&nvlist, NV_UNIQUE_NAME, 0) != 0) {
4188 (void) no_memory(hdl);
4189 return (0);
4190 }
4191 }
4192
4193 switch (cmd) {
4194 case ZFS_SMB_ACL_ADD:
4195 case ZFS_SMB_ACL_REMOVE:
4196 (void) strlcpy(zc.zc_string, resource1, sizeof (zc.zc_string));
4197 break;
4198 case ZFS_SMB_ACL_RENAME:
4199 if (nvlist_add_string(nvlist, ZFS_SMB_ACL_SRC,
4200 resource1) != 0) {
4201 (void) no_memory(hdl);
4202 return (-1);
4203 }
4204 if (nvlist_add_string(nvlist, ZFS_SMB_ACL_TARGET,
4205 resource2) != 0) {
4206 (void) no_memory(hdl);
4207 return (-1);
4208 }
4209 if (zcmd_write_src_nvlist(hdl, &zc, nvlist) != 0) {
4210 nvlist_free(nvlist);
4211 return (-1);
4212 }
4213 break;
4214 case ZFS_SMB_ACL_PURGE:
4215 break;
4216 default:
4217 return (-1);
4218 }
4219 error = ioctl(hdl->libzfs_fd, ZFS_IOC_SMB_ACL, &zc);
4220 if (nvlist)
4221 nvlist_free(nvlist);
4222 return (error);
4223 }
4224
4225 int
4226 zfs_smb_acl_add(libzfs_handle_t *hdl, char *dataset,
4227 char *path, char *resource)
4228 {
4229 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_ADD,
4230 resource, NULL));
4231 }
4232
4233 int
4234 zfs_smb_acl_remove(libzfs_handle_t *hdl, char *dataset,
4235 char *path, char *resource)
4236 {
4237 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_REMOVE,
4238 resource, NULL));
4239 }
4240
4241 int
4242 zfs_smb_acl_purge(libzfs_handle_t *hdl, char *dataset, char *path)
4243 {
4244 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_PURGE,
4245 NULL, NULL));
4246 }
4247
4248 int
4249 zfs_smb_acl_rename(libzfs_handle_t *hdl, char *dataset, char *path,
4250 char *oldname, char *newname)
4251 {
4252 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_RENAME,
4253 oldname, newname));
4254 }
4255
4256 int
4257 zfs_userspace(zfs_handle_t *zhp, zfs_userquota_prop_t type,
4258 zfs_userspace_cb_t func, void *arg)
4259 {
4260 zfs_cmd_t zc = { 0 };
4261 zfs_useracct_t buf[100];
4262 libzfs_handle_t *hdl = zhp->zfs_hdl;
4263 int ret;
4264
4265 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
4266
4267 zc.zc_objset_type = type;
4268 zc.zc_nvlist_dst = (uintptr_t)buf;
4269
4270 for (;;) {
4271 zfs_useracct_t *zua = buf;
4272
4273 zc.zc_nvlist_dst_size = sizeof (buf);
4274 if (zfs_ioctl(hdl, ZFS_IOC_USERSPACE_MANY, &zc) != 0) {
4275 char errbuf[1024];
4276
4277 (void) snprintf(errbuf, sizeof (errbuf),
4278 dgettext(TEXT_DOMAIN,
4279 "cannot get used/quota for %s"), zc.zc_name);
4280 return (zfs_standard_error_fmt(hdl, errno, errbuf));
4281 }
4282 if (zc.zc_nvlist_dst_size == 0)
4283 break;
4284
4285 while (zc.zc_nvlist_dst_size > 0) {
4286 if ((ret = func(arg, zua->zu_domain, zua->zu_rid,
4287 zua->zu_space)) != 0)
4288 return (ret);
4289 zua++;
4290 zc.zc_nvlist_dst_size -= sizeof (zfs_useracct_t);
4291 }
4292 }
4293
4294 return (0);
4295 }
4296
4297 struct holdarg {
4298 nvlist_t *nvl;
4299 const char *snapname;
4300 const char *tag;
4301 boolean_t recursive;
4302 int error;
4303 };
4304
4305 static int
4306 zfs_hold_one(zfs_handle_t *zhp, void *arg)
4307 {
4308 struct holdarg *ha = arg;
4309 char name[ZFS_MAXNAMELEN];
4310 int rv = 0;
4311
4312 (void) snprintf(name, sizeof (name),
4313 "%s@%s", zhp->zfs_name, ha->snapname);
4314
4315 if (lzc_exists(name))
4316 fnvlist_add_string(ha->nvl, name, ha->tag);
4317
4318 if (ha->recursive)
4319 rv = zfs_iter_filesystems(zhp, zfs_hold_one, ha);
4320 zfs_close(zhp);
4321 return (rv);
4322 }
4323
4324 int
4325 zfs_hold(zfs_handle_t *zhp, const char *snapname, const char *tag,
4326 boolean_t recursive, int cleanup_fd)
4327 {
4328 int ret;
4329 struct holdarg ha;
4330
4331 ha.nvl = fnvlist_alloc();
4332 ha.snapname = snapname;
4333 ha.tag = tag;
4334 ha.recursive = recursive;
4335 (void) zfs_hold_one(zfs_handle_dup(zhp), &ha);
4336
4337 if (nvlist_empty(ha.nvl)) {
4338 char errbuf[1024];
4339
4340 fnvlist_free(ha.nvl);
4341 ret = ENOENT;
4342 (void) snprintf(errbuf, sizeof (errbuf),
4343 dgettext(TEXT_DOMAIN,
4344 "cannot hold snapshot '%s@%s'"),
4345 zhp->zfs_name, snapname);
4346 (void) zfs_standard_error(zhp->zfs_hdl, ret, errbuf);
4347 return (ret);
4348 }
4349
4350 ret = zfs_hold_nvl(zhp, cleanup_fd, ha.nvl);
4351 fnvlist_free(ha.nvl);
4352
4353 return (ret);
4354 }
4355
4356 int
4357 zfs_hold_nvl(zfs_handle_t *zhp, int cleanup_fd, nvlist_t *holds)
4358 {
4359 int ret;
4360 nvlist_t *errors;
4361 libzfs_handle_t *hdl = zhp->zfs_hdl;
4362 char errbuf[1024];
4363 nvpair_t *elem;
4364
4365 errors = NULL;
4366 ret = lzc_hold(holds, cleanup_fd, &errors);
4367
4368 if (ret == 0) {
4369 /* There may be errors even in the success case. */
4370 fnvlist_free(errors);
4371 return (0);
4372 }
4373
4374 if (nvlist_empty(errors)) {
4375 /* no hold-specific errors */
4376 (void) snprintf(errbuf, sizeof (errbuf),
4377 dgettext(TEXT_DOMAIN, "cannot hold"));
4378 switch (ret) {
4379 case ENOTSUP:
4380 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4381 "pool must be upgraded"));
4382 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf);
4383 break;
4384 case EINVAL:
4385 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
4386 break;
4387 default:
4388 (void) zfs_standard_error(hdl, ret, errbuf);
4389 }
4390 }
4391
4392 for (elem = nvlist_next_nvpair(errors, NULL);
4393 elem != NULL;
4394 elem = nvlist_next_nvpair(errors, elem)) {
4395 (void) snprintf(errbuf, sizeof (errbuf),
4396 dgettext(TEXT_DOMAIN,
4397 "cannot hold snapshot '%s'"), nvpair_name(elem));
4398 switch (fnvpair_value_int32(elem)) {
4399 case E2BIG:
4400 /*
4401 * Temporary tags wind up having the ds object id
4402 * prepended. So even if we passed the length check
4403 * above, it's still possible for the tag to wind
4404 * up being slightly too long.
4405 */
4406 (void) zfs_error(hdl, EZFS_TAGTOOLONG, errbuf);
4407 break;
4408 case EINVAL:
4409 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
4410 break;
4411 case EEXIST:
4412 (void) zfs_error(hdl, EZFS_REFTAG_HOLD, errbuf);
4413 break;
4414 default:
4415 (void) zfs_standard_error(hdl,
4416 fnvpair_value_int32(elem), errbuf);
4417 }
4418 }
4419
4420 fnvlist_free(errors);
4421 return (ret);
4422 }
4423
4424 static int
4425 zfs_release_one(zfs_handle_t *zhp, void *arg)
4426 {
4427 struct holdarg *ha = arg;
4428 char name[ZFS_MAXNAMELEN];
4429 int rv = 0;
4430 nvlist_t *existing_holds;
4431
4432 (void) snprintf(name, sizeof (name),
4433 "%s@%s", zhp->zfs_name, ha->snapname);
4434
4435 if (lzc_get_holds(name, &existing_holds) != 0) {
4436 ha->error = ENOENT;
4437 } else if (!nvlist_exists(existing_holds, ha->tag)) {
4438 ha->error = ESRCH;
4439 } else {
4440 nvlist_t *torelease = fnvlist_alloc();
4441 fnvlist_add_boolean(torelease, ha->tag);
4442 fnvlist_add_nvlist(ha->nvl, name, torelease);
4443 fnvlist_free(torelease);
4444 }
4445
4446 if (ha->recursive)
4447 rv = zfs_iter_filesystems(zhp, zfs_release_one, ha);
4448 zfs_close(zhp);
4449 return (rv);
4450 }
4451
4452 int
4453 zfs_release(zfs_handle_t *zhp, const char *snapname, const char *tag,
4454 boolean_t recursive)
4455 {
4456 int ret;
4457 struct holdarg ha;
4458 nvlist_t *errors = NULL;
4459 nvpair_t *elem;
4460 libzfs_handle_t *hdl = zhp->zfs_hdl;
4461 char errbuf[1024];
4462
4463 ha.nvl = fnvlist_alloc();
4464 ha.snapname = snapname;
4465 ha.tag = tag;
4466 ha.recursive = recursive;
4467 ha.error = 0;
4468 (void) zfs_release_one(zfs_handle_dup(zhp), &ha);
4469
4470 if (nvlist_empty(ha.nvl)) {
4471 fnvlist_free(ha.nvl);
4472 ret = ha.error;
4473 (void) snprintf(errbuf, sizeof (errbuf),
4474 dgettext(TEXT_DOMAIN,
4475 "cannot release hold from snapshot '%s@%s'"),
4476 zhp->zfs_name, snapname);
4477 if (ret == ESRCH) {
4478 (void) zfs_error(hdl, EZFS_REFTAG_RELE, errbuf);
4479 } else {
4480 (void) zfs_standard_error(hdl, ret, errbuf);
4481 }
4482 return (ret);
4483 }
4484
4485 ret = lzc_release(ha.nvl, &errors);
4486 fnvlist_free(ha.nvl);
4487
4488 if (ret == 0) {
4489 /* There may be errors even in the success case. */
4490 fnvlist_free(errors);
4491 return (0);
4492 }
4493
4494 if (nvlist_empty(errors)) {
4495 /* no hold-specific errors */
4496 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
4497 "cannot release"));
4498 switch (errno) {
4499 case ENOTSUP:
4500 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4501 "pool must be upgraded"));
4502 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf);
4503 break;
4504 default:
4505 (void) zfs_standard_error_fmt(hdl, errno, errbuf);
4506 }
4507 }
4508
4509 for (elem = nvlist_next_nvpair(errors, NULL);
4510 elem != NULL;
4511 elem = nvlist_next_nvpair(errors, elem)) {
4512 (void) snprintf(errbuf, sizeof (errbuf),
4513 dgettext(TEXT_DOMAIN,
4514 "cannot release hold from snapshot '%s'"),
4515 nvpair_name(elem));
4516 switch (fnvpair_value_int32(elem)) {
4517 case ESRCH:
4518 (void) zfs_error(hdl, EZFS_REFTAG_RELE, errbuf);
4519 break;
4520 case EINVAL:
4521 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
4522 break;
4523 default:
4524 (void) zfs_standard_error_fmt(hdl,
4525 fnvpair_value_int32(elem), errbuf);
4526 }
4527 }
4528
4529 fnvlist_free(errors);
4530 return (ret);
4531 }
4532
4533 int
4534 zfs_get_fsacl(zfs_handle_t *zhp, nvlist_t **nvl)
4535 {
4536 zfs_cmd_t zc = { 0 };
4537 libzfs_handle_t *hdl = zhp->zfs_hdl;
4538 int nvsz = 2048;
4539 void *nvbuf;
4540 int err = 0;
4541 char errbuf[1024];
4542
4543 assert(zhp->zfs_type == ZFS_TYPE_VOLUME ||
4544 zhp->zfs_type == ZFS_TYPE_FILESYSTEM);
4545
4546 tryagain:
4547
4548 nvbuf = malloc(nvsz);
4549 if (nvbuf == NULL) {
4550 err = (zfs_error(hdl, EZFS_NOMEM, strerror(errno)));
4551 goto out;
4552 }
4553
4554 zc.zc_nvlist_dst_size = nvsz;
4555 zc.zc_nvlist_dst = (uintptr_t)nvbuf;
4556
4557 (void) strlcpy(zc.zc_name, zhp->zfs_name, ZFS_MAXNAMELEN);
4558
4559 if (ioctl(hdl->libzfs_fd, ZFS_IOC_GET_FSACL, &zc) != 0) {
4560 (void) snprintf(errbuf, sizeof (errbuf),
4561 dgettext(TEXT_DOMAIN, "cannot get permissions on '%s'"),
4562 zc.zc_name);
4563 switch (errno) {
4564 case ENOMEM:
4565 free(nvbuf);
4566 nvsz = zc.zc_nvlist_dst_size;
4567 goto tryagain;
4568
4569 case ENOTSUP:
4570 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4571 "pool must be upgraded"));
4572 err = zfs_error(hdl, EZFS_BADVERSION, errbuf);
4573 break;
4574 case EINVAL:
4575 err = zfs_error(hdl, EZFS_BADTYPE, errbuf);
4576 break;
4577 case ENOENT:
4578 err = zfs_error(hdl, EZFS_NOENT, errbuf);
4579 break;
4580 default:
4581 err = zfs_standard_error_fmt(hdl, errno, errbuf);
4582 break;
4583 }
4584 } else {
4585 /* success */
4586 int rc = nvlist_unpack(nvbuf, zc.zc_nvlist_dst_size, nvl, 0);
4587 if (rc) {
4588 (void) snprintf(errbuf, sizeof (errbuf), dgettext(
4589 TEXT_DOMAIN, "cannot get permissions on '%s'"),
4590 zc.zc_name);
4591 err = zfs_standard_error_fmt(hdl, rc, errbuf);
4592 }
4593 }
4594
4595 free(nvbuf);
4596 out:
4597 return (err);
4598 }
4599
4600 int
4601 zfs_set_fsacl(zfs_handle_t *zhp, boolean_t un, nvlist_t *nvl)
4602 {
4603 zfs_cmd_t zc = { 0 };
4604 libzfs_handle_t *hdl = zhp->zfs_hdl;
4605 char *nvbuf;
4606 char errbuf[1024];
4607 size_t nvsz;
4608 int err;
4609
4610 assert(zhp->zfs_type == ZFS_TYPE_VOLUME ||
4611 zhp->zfs_type == ZFS_TYPE_FILESYSTEM);
4612
4613 err = nvlist_size(nvl, &nvsz, NV_ENCODE_NATIVE);
4614 assert(err == 0);
4615
4616 nvbuf = malloc(nvsz);
4617
4618 err = nvlist_pack(nvl, &nvbuf, &nvsz, NV_ENCODE_NATIVE, 0);
4619 assert(err == 0);
4620
4621 zc.zc_nvlist_src_size = nvsz;
4622 zc.zc_nvlist_src = (uintptr_t)nvbuf;
4623 zc.zc_perm_action = un;
4624
4625 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
4626
4627 if (zfs_ioctl(hdl, ZFS_IOC_SET_FSACL, &zc) != 0) {
4628 (void) snprintf(errbuf, sizeof (errbuf),
4629 dgettext(TEXT_DOMAIN, "cannot set permissions on '%s'"),
4630 zc.zc_name);
4631 switch (errno) {
4632 case ENOTSUP:
4633 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4634 "pool must be upgraded"));
4635 err = zfs_error(hdl, EZFS_BADVERSION, errbuf);
4636 break;
4637 case EINVAL:
4638 err = zfs_error(hdl, EZFS_BADTYPE, errbuf);
4639 break;
4640 case ENOENT:
4641 err = zfs_error(hdl, EZFS_NOENT, errbuf);
4642 break;
4643 default:
4644 err = zfs_standard_error_fmt(hdl, errno, errbuf);
4645 break;
4646 }
4647 }
4648
4649 free(nvbuf);
4650
4651 return (err);
4652 }
4653
4654 int
4655 zfs_get_holds(zfs_handle_t *zhp, nvlist_t **nvl)
4656 {
4657 int err;
4658 char errbuf[1024];
4659
4660 err = lzc_get_holds(zhp->zfs_name, nvl);
4661
4662 if (err != 0) {
4663 libzfs_handle_t *hdl = zhp->zfs_hdl;
4664
4665 (void) snprintf(errbuf, sizeof (errbuf),
4666 dgettext(TEXT_DOMAIN, "cannot get holds for '%s'"),
4667 zhp->zfs_name);
4668 switch (err) {
4669 case ENOTSUP:
4670 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4671 "pool must be upgraded"));
4672 err = zfs_error(hdl, EZFS_BADVERSION, errbuf);
4673 break;
4674 case EINVAL:
4675 err = zfs_error(hdl, EZFS_BADTYPE, errbuf);
4676 break;
4677 case ENOENT:
4678 err = zfs_error(hdl, EZFS_NOENT, errbuf);
4679 break;
4680 default:
4681 err = zfs_standard_error_fmt(hdl, errno, errbuf);
4682 break;
4683 }
4684 }
4685
4686 return (err);
4687 }
4688
4689 /*
4690 * Convert the zvol's volume size to an appropriate reservation.
4691 * Note: If this routine is updated, it is necessary to update the ZFS test
4692 * suite's shell version in reservation.kshlib.
4693 */
4694 uint64_t
4695 zvol_volsize_to_reservation(uint64_t volsize, nvlist_t *props)
4696 {
4697 uint64_t numdb;
4698 uint64_t nblocks, volblocksize;
4699 int ncopies;
4700 char *strval;
4701
4702 if (nvlist_lookup_string(props,
4703 zfs_prop_to_name(ZFS_PROP_COPIES), &strval) == 0)
4704 ncopies = atoi(strval);
4705 else
4706 ncopies = 1;
4707 if (nvlist_lookup_uint64(props,
4708 zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
4709 &volblocksize) != 0)
4710 volblocksize = ZVOL_DEFAULT_BLOCKSIZE;
4711 nblocks = volsize/volblocksize;
4712 /* start with metadnode L0-L6 */
4713 numdb = 7;
4714 /* calculate number of indirects */
4715 while (nblocks > 1) {
4716 nblocks += DNODES_PER_LEVEL - 1;
4717 nblocks /= DNODES_PER_LEVEL;
4718 numdb += nblocks;
4719 }
4720 numdb *= MIN(SPA_DVAS_PER_BP, ncopies + 1);
4721 volsize *= ncopies;
4722 /*
4723 * this is exactly DN_MAX_INDBLKSHIFT when metadata isn't
4724 * compressed, but in practice they compress down to about
4725 * 1100 bytes
4726 */
4727 numdb *= 1ULL << DN_MAX_INDBLKSHIFT;
4728 volsize += numdb;
4729 return (volsize);
4730 }