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