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