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Add `zfs allow` and `zfs unallow` support
[mirror_zfs.git] / lib / libzfs / libzfs_dataset.c
1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Copyright (c) 2013, Joyent, Inc. All rights reserved.
25 * Copyright (c) 2011, 2015 by Delphix. All rights reserved.
26 * Copyright (c) 2012 DEY Storage Systems, Inc. All rights reserved.
27 * Copyright (c) 2012 Pawel Jakub Dawidek <pawel@dawidek.net>.
28 * Copyright (c) 2013 Martin Matuska. All rights reserved.
29 * Copyright (c) 2013 Steven Hartland. All rights reserved.
30 * Copyright 2013 Nexenta Systems, Inc. All rights reserved.
31 */
32
33 #include <ctype.h>
34 #include <errno.h>
35 #include <libintl.h>
36 #include <math.h>
37 #include <stdio.h>
38 #include <stdlib.h>
39 #include <strings.h>
40 #include <unistd.h>
41 #include <stddef.h>
42 #include <zone.h>
43 #include <fcntl.h>
44 #include <sys/mntent.h>
45 #include <sys/mount.h>
46 #include <pwd.h>
47 #include <grp.h>
48 #include <stddef.h>
49 #include <ucred.h>
50 #ifdef HAVE_IDMAP
51 #include <idmap.h>
52 #include <aclutils.h>
53 #include <directory.h>
54 #endif /* HAVE_IDMAP */
55
56 #include <sys/dnode.h>
57 #include <sys/spa.h>
58 #include <sys/zap.h>
59 #include <libzfs.h>
60
61 #include "zfs_namecheck.h"
62 #include "zfs_prop.h"
63 #include "libzfs_impl.h"
64 #include "zfs_deleg.h"
65
66 static int userquota_propname_decode(const char *propname, boolean_t zoned,
67 zfs_userquota_prop_t *typep, char *domain, int domainlen, uint64_t *ridp);
68
69 /*
70 * Given a single type (not a mask of types), return the type in a human
71 * readable form.
72 */
73 const char *
74 zfs_type_to_name(zfs_type_t type)
75 {
76 switch (type) {
77 case ZFS_TYPE_FILESYSTEM:
78 return (dgettext(TEXT_DOMAIN, "filesystem"));
79 case ZFS_TYPE_SNAPSHOT:
80 return (dgettext(TEXT_DOMAIN, "snapshot"));
81 case ZFS_TYPE_VOLUME:
82 return (dgettext(TEXT_DOMAIN, "volume"));
83 default:
84 break;
85 }
86
87 return (NULL);
88 }
89
90 /*
91 * Validate a ZFS path. This is used even before trying to open the dataset, to
92 * provide a more meaningful error message. We call zfs_error_aux() to
93 * explain exactly why the name was not valid.
94 */
95 int
96 zfs_validate_name(libzfs_handle_t *hdl, const char *path, int type,
97 boolean_t modifying)
98 {
99 namecheck_err_t why;
100 char what;
101
102 (void) zfs_prop_get_table();
103 if (dataset_namecheck(path, &why, &what) != 0) {
104 if (hdl != NULL) {
105 switch (why) {
106 case NAME_ERR_TOOLONG:
107 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
108 "name is too long"));
109 break;
110
111 case NAME_ERR_LEADING_SLASH:
112 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
113 "leading slash in name"));
114 break;
115
116 case NAME_ERR_EMPTY_COMPONENT:
117 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
118 "empty component in name"));
119 break;
120
121 case NAME_ERR_TRAILING_SLASH:
122 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
123 "trailing slash in name"));
124 break;
125
126 case NAME_ERR_INVALCHAR:
127 zfs_error_aux(hdl,
128 dgettext(TEXT_DOMAIN, "invalid character "
129 "'%c' in name"), what);
130 break;
131
132 case NAME_ERR_MULTIPLE_AT:
133 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
134 "multiple '@' delimiters in name"));
135 break;
136
137 case NAME_ERR_NOLETTER:
138 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
139 "pool doesn't begin with a letter"));
140 break;
141
142 case NAME_ERR_RESERVED:
143 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
144 "name is reserved"));
145 break;
146
147 case NAME_ERR_DISKLIKE:
148 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
149 "reserved disk name"));
150 break;
151 default:
152 break;
153 }
154 }
155
156 return (0);
157 }
158
159 if (!(type & ZFS_TYPE_SNAPSHOT) && strchr(path, '@') != NULL) {
160 if (hdl != NULL)
161 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
162 "snapshot delimiter '@' in filesystem name"));
163 return (0);
164 }
165
166 if (type == ZFS_TYPE_SNAPSHOT && strchr(path, '@') == NULL) {
167 if (hdl != NULL)
168 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
169 "missing '@' delimiter in snapshot name"));
170 return (0);
171 }
172
173 if (modifying && strchr(path, '%') != NULL) {
174 if (hdl != NULL)
175 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
176 "invalid character %c in name"), '%');
177 return (0);
178 }
179
180 return (-1);
181 }
182
183 int
184 zfs_name_valid(const char *name, zfs_type_t type)
185 {
186 if (type == ZFS_TYPE_POOL)
187 return (zpool_name_valid(NULL, B_FALSE, name));
188 return (zfs_validate_name(NULL, name, type, B_FALSE));
189 }
190
191 /*
192 * This function takes the raw DSL properties, and filters out the user-defined
193 * properties into a separate nvlist.
194 */
195 static nvlist_t *
196 process_user_props(zfs_handle_t *zhp, nvlist_t *props)
197 {
198 libzfs_handle_t *hdl = zhp->zfs_hdl;
199 nvpair_t *elem;
200 nvlist_t *propval;
201 nvlist_t *nvl;
202
203 if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0) {
204 (void) no_memory(hdl);
205 return (NULL);
206 }
207
208 elem = NULL;
209 while ((elem = nvlist_next_nvpair(props, elem)) != NULL) {
210 if (!zfs_prop_user(nvpair_name(elem)))
211 continue;
212
213 verify(nvpair_value_nvlist(elem, &propval) == 0);
214 if (nvlist_add_nvlist(nvl, nvpair_name(elem), propval) != 0) {
215 nvlist_free(nvl);
216 (void) no_memory(hdl);
217 return (NULL);
218 }
219 }
220
221 return (nvl);
222 }
223
224 static zpool_handle_t *
225 zpool_add_handle(zfs_handle_t *zhp, const char *pool_name)
226 {
227 libzfs_handle_t *hdl = zhp->zfs_hdl;
228 zpool_handle_t *zph;
229
230 if ((zph = zpool_open_canfail(hdl, pool_name)) != NULL) {
231 if (hdl->libzfs_pool_handles != NULL)
232 zph->zpool_next = hdl->libzfs_pool_handles;
233 hdl->libzfs_pool_handles = zph;
234 }
235 return (zph);
236 }
237
238 static zpool_handle_t *
239 zpool_find_handle(zfs_handle_t *zhp, const char *pool_name, int len)
240 {
241 libzfs_handle_t *hdl = zhp->zfs_hdl;
242 zpool_handle_t *zph = hdl->libzfs_pool_handles;
243
244 while ((zph != NULL) &&
245 (strncmp(pool_name, zpool_get_name(zph), len) != 0))
246 zph = zph->zpool_next;
247 return (zph);
248 }
249
250 /*
251 * Returns a handle to the pool that contains the provided dataset.
252 * If a handle to that pool already exists then that handle is returned.
253 * Otherwise, a new handle is created and added to the list of handles.
254 */
255 static zpool_handle_t *
256 zpool_handle(zfs_handle_t *zhp)
257 {
258 char *pool_name;
259 int len;
260 zpool_handle_t *zph;
261
262 len = strcspn(zhp->zfs_name, "/@#") + 1;
263 pool_name = zfs_alloc(zhp->zfs_hdl, len);
264 (void) strlcpy(pool_name, zhp->zfs_name, len);
265
266 zph = zpool_find_handle(zhp, pool_name, len);
267 if (zph == NULL)
268 zph = zpool_add_handle(zhp, pool_name);
269
270 free(pool_name);
271 return (zph);
272 }
273
274 void
275 zpool_free_handles(libzfs_handle_t *hdl)
276 {
277 zpool_handle_t *next, *zph = hdl->libzfs_pool_handles;
278
279 while (zph != NULL) {
280 next = zph->zpool_next;
281 zpool_close(zph);
282 zph = next;
283 }
284 hdl->libzfs_pool_handles = NULL;
285 }
286
287 /*
288 * Utility function to gather stats (objset and zpl) for the given object.
289 */
290 static int
291 get_stats_ioctl(zfs_handle_t *zhp, zfs_cmd_t *zc)
292 {
293 libzfs_handle_t *hdl = zhp->zfs_hdl;
294
295 (void) strlcpy(zc->zc_name, zhp->zfs_name, sizeof (zc->zc_name));
296
297 while (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_STATS, zc) != 0) {
298 if (errno == ENOMEM) {
299 if (zcmd_expand_dst_nvlist(hdl, zc) != 0) {
300 return (-1);
301 }
302 } else {
303 return (-1);
304 }
305 }
306 return (0);
307 }
308
309 /*
310 * Utility function to get the received properties of the given object.
311 */
312 static int
313 get_recvd_props_ioctl(zfs_handle_t *zhp)
314 {
315 libzfs_handle_t *hdl = zhp->zfs_hdl;
316 nvlist_t *recvdprops;
317 zfs_cmd_t zc = {"\0"};
318 int err;
319
320 if (zcmd_alloc_dst_nvlist(hdl, &zc, 0) != 0)
321 return (-1);
322
323 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
324
325 while (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_RECVD_PROPS, &zc) != 0) {
326 if (errno == ENOMEM) {
327 if (zcmd_expand_dst_nvlist(hdl, &zc) != 0) {
328 return (-1);
329 }
330 } else {
331 zcmd_free_nvlists(&zc);
332 return (-1);
333 }
334 }
335
336 err = zcmd_read_dst_nvlist(zhp->zfs_hdl, &zc, &recvdprops);
337 zcmd_free_nvlists(&zc);
338 if (err != 0)
339 return (-1);
340
341 nvlist_free(zhp->zfs_recvd_props);
342 zhp->zfs_recvd_props = recvdprops;
343
344 return (0);
345 }
346
347 static int
348 put_stats_zhdl(zfs_handle_t *zhp, zfs_cmd_t *zc)
349 {
350 nvlist_t *allprops, *userprops;
351
352 zhp->zfs_dmustats = zc->zc_objset_stats; /* structure assignment */
353
354 if (zcmd_read_dst_nvlist(zhp->zfs_hdl, zc, &allprops) != 0) {
355 return (-1);
356 }
357
358 /*
359 * XXX Why do we store the user props separately, in addition to
360 * storing them in zfs_props?
361 */
362 if ((userprops = process_user_props(zhp, allprops)) == NULL) {
363 nvlist_free(allprops);
364 return (-1);
365 }
366
367 nvlist_free(zhp->zfs_props);
368 nvlist_free(zhp->zfs_user_props);
369
370 zhp->zfs_props = allprops;
371 zhp->zfs_user_props = userprops;
372
373 return (0);
374 }
375
376 static int
377 get_stats(zfs_handle_t *zhp)
378 {
379 int rc = 0;
380 zfs_cmd_t zc = {"\0"};
381
382 if (zcmd_alloc_dst_nvlist(zhp->zfs_hdl, &zc, 0) != 0)
383 return (-1);
384 if (get_stats_ioctl(zhp, &zc) != 0)
385 rc = -1;
386 else if (put_stats_zhdl(zhp, &zc) != 0)
387 rc = -1;
388 zcmd_free_nvlists(&zc);
389 return (rc);
390 }
391
392 /*
393 * Refresh the properties currently stored in the handle.
394 */
395 void
396 zfs_refresh_properties(zfs_handle_t *zhp)
397 {
398 (void) get_stats(zhp);
399 }
400
401 /*
402 * Makes a handle from the given dataset name. Used by zfs_open() and
403 * zfs_iter_* to create child handles on the fly.
404 */
405 static int
406 make_dataset_handle_common(zfs_handle_t *zhp, zfs_cmd_t *zc)
407 {
408 if (put_stats_zhdl(zhp, zc) != 0)
409 return (-1);
410
411 /*
412 * We've managed to open the dataset and gather statistics. Determine
413 * the high-level type.
414 */
415 if (zhp->zfs_dmustats.dds_type == DMU_OST_ZVOL)
416 zhp->zfs_head_type = ZFS_TYPE_VOLUME;
417 else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZFS)
418 zhp->zfs_head_type = ZFS_TYPE_FILESYSTEM;
419 else if (zhp->zfs_dmustats.dds_type == DMU_OST_OTHER)
420 return (-1);
421 else
422 abort();
423
424 if (zhp->zfs_dmustats.dds_is_snapshot)
425 zhp->zfs_type = ZFS_TYPE_SNAPSHOT;
426 else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZVOL)
427 zhp->zfs_type = ZFS_TYPE_VOLUME;
428 else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZFS)
429 zhp->zfs_type = ZFS_TYPE_FILESYSTEM;
430 else
431 abort(); /* we should never see any other types */
432
433 if ((zhp->zpool_hdl = zpool_handle(zhp)) == NULL)
434 return (-1);
435
436 return (0);
437 }
438
439 zfs_handle_t *
440 make_dataset_handle(libzfs_handle_t *hdl, const char *path)
441 {
442 zfs_cmd_t zc = {"\0"};
443
444 zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1);
445
446 if (zhp == NULL)
447 return (NULL);
448
449 zhp->zfs_hdl = hdl;
450 (void) strlcpy(zhp->zfs_name, path, sizeof (zhp->zfs_name));
451 if (zcmd_alloc_dst_nvlist(hdl, &zc, 0) != 0) {
452 free(zhp);
453 return (NULL);
454 }
455 if (get_stats_ioctl(zhp, &zc) == -1) {
456 zcmd_free_nvlists(&zc);
457 free(zhp);
458 return (NULL);
459 }
460 if (make_dataset_handle_common(zhp, &zc) == -1) {
461 free(zhp);
462 zhp = NULL;
463 }
464 zcmd_free_nvlists(&zc);
465 return (zhp);
466 }
467
468 zfs_handle_t *
469 make_dataset_handle_zc(libzfs_handle_t *hdl, zfs_cmd_t *zc)
470 {
471 zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1);
472
473 if (zhp == NULL)
474 return (NULL);
475
476 zhp->zfs_hdl = hdl;
477 (void) strlcpy(zhp->zfs_name, zc->zc_name, sizeof (zhp->zfs_name));
478 if (make_dataset_handle_common(zhp, zc) == -1) {
479 free(zhp);
480 return (NULL);
481 }
482 return (zhp);
483 }
484
485 zfs_handle_t *
486 make_dataset_simple_handle_zc(zfs_handle_t *pzhp, zfs_cmd_t *zc)
487 {
488 zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1);
489
490 if (zhp == NULL)
491 return (NULL);
492
493 zhp->zfs_hdl = pzhp->zfs_hdl;
494 (void) strlcpy(zhp->zfs_name, zc->zc_name, sizeof (zhp->zfs_name));
495 zhp->zfs_head_type = pzhp->zfs_type;
496 zhp->zfs_type = ZFS_TYPE_SNAPSHOT;
497 zhp->zpool_hdl = zpool_handle(zhp);
498
499 return (zhp);
500 }
501
502 zfs_handle_t *
503 zfs_handle_dup(zfs_handle_t *zhp_orig)
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 = zhp_orig->zfs_hdl;
511 zhp->zpool_hdl = zhp_orig->zpool_hdl;
512 (void) strlcpy(zhp->zfs_name, zhp_orig->zfs_name,
513 sizeof (zhp->zfs_name));
514 zhp->zfs_type = zhp_orig->zfs_type;
515 zhp->zfs_head_type = zhp_orig->zfs_head_type;
516 zhp->zfs_dmustats = zhp_orig->zfs_dmustats;
517 if (zhp_orig->zfs_props != NULL) {
518 if (nvlist_dup(zhp_orig->zfs_props, &zhp->zfs_props, 0) != 0) {
519 (void) no_memory(zhp->zfs_hdl);
520 zfs_close(zhp);
521 return (NULL);
522 }
523 }
524 if (zhp_orig->zfs_user_props != NULL) {
525 if (nvlist_dup(zhp_orig->zfs_user_props,
526 &zhp->zfs_user_props, 0) != 0) {
527 (void) no_memory(zhp->zfs_hdl);
528 zfs_close(zhp);
529 return (NULL);
530 }
531 }
532 if (zhp_orig->zfs_recvd_props != NULL) {
533 if (nvlist_dup(zhp_orig->zfs_recvd_props,
534 &zhp->zfs_recvd_props, 0)) {
535 (void) no_memory(zhp->zfs_hdl);
536 zfs_close(zhp);
537 return (NULL);
538 }
539 }
540 zhp->zfs_mntcheck = zhp_orig->zfs_mntcheck;
541 if (zhp_orig->zfs_mntopts != NULL) {
542 zhp->zfs_mntopts = zfs_strdup(zhp_orig->zfs_hdl,
543 zhp_orig->zfs_mntopts);
544 }
545 zhp->zfs_props_table = zhp_orig->zfs_props_table;
546 return (zhp);
547 }
548
549 boolean_t
550 zfs_bookmark_exists(const char *path)
551 {
552 nvlist_t *bmarks;
553 nvlist_t *props;
554 char fsname[ZFS_MAXNAMELEN];
555 char *bmark_name;
556 char *pound;
557 int err;
558 boolean_t rv;
559
560
561 (void) strlcpy(fsname, path, sizeof (fsname));
562 pound = strchr(fsname, '#');
563 if (pound == NULL)
564 return (B_FALSE);
565
566 *pound = '\0';
567 bmark_name = pound + 1;
568 props = fnvlist_alloc();
569 err = lzc_get_bookmarks(fsname, props, &bmarks);
570 nvlist_free(props);
571 if (err != 0) {
572 nvlist_free(bmarks);
573 return (B_FALSE);
574 }
575
576 rv = nvlist_exists(bmarks, bmark_name);
577 nvlist_free(bmarks);
578 return (rv);
579 }
580
581 zfs_handle_t *
582 make_bookmark_handle(zfs_handle_t *parent, const char *path,
583 nvlist_t *bmark_props)
584 {
585 zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1);
586
587 if (zhp == NULL)
588 return (NULL);
589
590 /* Fill in the name. */
591 zhp->zfs_hdl = parent->zfs_hdl;
592 (void) strlcpy(zhp->zfs_name, path, sizeof (zhp->zfs_name));
593
594 /* Set the property lists. */
595 if (nvlist_dup(bmark_props, &zhp->zfs_props, 0) != 0) {
596 free(zhp);
597 return (NULL);
598 }
599
600 /* Set the types. */
601 zhp->zfs_head_type = parent->zfs_head_type;
602 zhp->zfs_type = ZFS_TYPE_BOOKMARK;
603
604 if ((zhp->zpool_hdl = zpool_handle(zhp)) == NULL) {
605 nvlist_free(zhp->zfs_props);
606 free(zhp);
607 return (NULL);
608 }
609
610 return (zhp);
611 }
612
613 /*
614 * Opens the given snapshot, filesystem, or volume. The 'types'
615 * argument is a mask of acceptable types. The function will print an
616 * appropriate error message and return NULL if it can't be opened.
617 */
618 zfs_handle_t *
619 zfs_open(libzfs_handle_t *hdl, const char *path, int types)
620 {
621 zfs_handle_t *zhp;
622 char errbuf[1024];
623
624 (void) snprintf(errbuf, sizeof (errbuf),
625 dgettext(TEXT_DOMAIN, "cannot open '%s'"), path);
626
627 /*
628 * Validate the name before we even try to open it.
629 */
630 if (!zfs_validate_name(hdl, path, ZFS_TYPE_DATASET, B_FALSE)) {
631 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
632 "invalid dataset name"));
633 (void) zfs_error(hdl, EZFS_INVALIDNAME, errbuf);
634 return (NULL);
635 }
636
637 /*
638 * Try to get stats for the dataset, which will tell us if it exists.
639 */
640 errno = 0;
641 if ((zhp = make_dataset_handle(hdl, path)) == NULL) {
642 (void) zfs_standard_error(hdl, errno, errbuf);
643 return (NULL);
644 }
645
646 if (!(types & zhp->zfs_type)) {
647 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
648 zfs_close(zhp);
649 return (NULL);
650 }
651
652 return (zhp);
653 }
654
655 /*
656 * Release a ZFS handle. Nothing to do but free the associated memory.
657 */
658 void
659 zfs_close(zfs_handle_t *zhp)
660 {
661 if (zhp->zfs_mntopts)
662 free(zhp->zfs_mntopts);
663 nvlist_free(zhp->zfs_props);
664 nvlist_free(zhp->zfs_user_props);
665 nvlist_free(zhp->zfs_recvd_props);
666 free(zhp);
667 }
668
669 typedef struct mnttab_node {
670 struct mnttab mtn_mt;
671 avl_node_t mtn_node;
672 } mnttab_node_t;
673
674 static int
675 libzfs_mnttab_cache_compare(const void *arg1, const void *arg2)
676 {
677 const mnttab_node_t *mtn1 = arg1;
678 const mnttab_node_t *mtn2 = arg2;
679 int rv;
680
681 rv = strcmp(mtn1->mtn_mt.mnt_special, mtn2->mtn_mt.mnt_special);
682
683 if (rv == 0)
684 return (0);
685 return (rv > 0 ? 1 : -1);
686 }
687
688 void
689 libzfs_mnttab_init(libzfs_handle_t *hdl)
690 {
691 assert(avl_numnodes(&hdl->libzfs_mnttab_cache) == 0);
692 avl_create(&hdl->libzfs_mnttab_cache, libzfs_mnttab_cache_compare,
693 sizeof (mnttab_node_t), offsetof(mnttab_node_t, mtn_node));
694 }
695
696 int
697 libzfs_mnttab_update(libzfs_handle_t *hdl)
698 {
699 struct mnttab entry;
700
701 /* Reopen MNTTAB to prevent reading stale data from open file */
702 if (freopen(MNTTAB, "r", hdl->libzfs_mnttab) == NULL)
703 return (ENOENT);
704
705 while (getmntent(hdl->libzfs_mnttab, &entry) == 0) {
706 mnttab_node_t *mtn;
707 avl_index_t where;
708
709 if (strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0)
710 continue;
711
712 mtn = zfs_alloc(hdl, sizeof (mnttab_node_t));
713 mtn->mtn_mt.mnt_special = zfs_strdup(hdl, entry.mnt_special);
714 mtn->mtn_mt.mnt_mountp = zfs_strdup(hdl, entry.mnt_mountp);
715 mtn->mtn_mt.mnt_fstype = zfs_strdup(hdl, entry.mnt_fstype);
716 mtn->mtn_mt.mnt_mntopts = zfs_strdup(hdl, entry.mnt_mntopts);
717
718 /* Exclude duplicate mounts */
719 if (avl_find(&hdl->libzfs_mnttab_cache, mtn, &where) != NULL) {
720 free(mtn->mtn_mt.mnt_special);
721 free(mtn->mtn_mt.mnt_mountp);
722 free(mtn->mtn_mt.mnt_fstype);
723 free(mtn->mtn_mt.mnt_mntopts);
724 free(mtn);
725 continue;
726 }
727
728 avl_add(&hdl->libzfs_mnttab_cache, mtn);
729 }
730
731 return (0);
732 }
733
734 void
735 libzfs_mnttab_fini(libzfs_handle_t *hdl)
736 {
737 void *cookie = NULL;
738 mnttab_node_t *mtn;
739
740 while ((mtn = avl_destroy_nodes(&hdl->libzfs_mnttab_cache, &cookie))) {
741 free(mtn->mtn_mt.mnt_special);
742 free(mtn->mtn_mt.mnt_mountp);
743 free(mtn->mtn_mt.mnt_fstype);
744 free(mtn->mtn_mt.mnt_mntopts);
745 free(mtn);
746 }
747 avl_destroy(&hdl->libzfs_mnttab_cache);
748 }
749
750 void
751 libzfs_mnttab_cache(libzfs_handle_t *hdl, boolean_t enable)
752 {
753 hdl->libzfs_mnttab_enable = enable;
754 }
755
756 int
757 libzfs_mnttab_find(libzfs_handle_t *hdl, const char *fsname,
758 struct mnttab *entry)
759 {
760 mnttab_node_t find;
761 mnttab_node_t *mtn;
762 int error;
763
764 if (!hdl->libzfs_mnttab_enable) {
765 struct mnttab srch = { 0 };
766
767 if (avl_numnodes(&hdl->libzfs_mnttab_cache))
768 libzfs_mnttab_fini(hdl);
769
770 /* Reopen MNTTAB to prevent reading stale data from open file */
771 if (freopen(MNTTAB, "r", hdl->libzfs_mnttab) == NULL)
772 return (ENOENT);
773
774 srch.mnt_special = (char *)fsname;
775 srch.mnt_fstype = MNTTYPE_ZFS;
776 if (getmntany(hdl->libzfs_mnttab, entry, &srch) == 0)
777 return (0);
778 else
779 return (ENOENT);
780 }
781
782 if (avl_numnodes(&hdl->libzfs_mnttab_cache) == 0)
783 if ((error = libzfs_mnttab_update(hdl)) != 0)
784 return (error);
785
786 find.mtn_mt.mnt_special = (char *)fsname;
787 mtn = avl_find(&hdl->libzfs_mnttab_cache, &find, NULL);
788 if (mtn) {
789 *entry = mtn->mtn_mt;
790 return (0);
791 }
792 return (ENOENT);
793 }
794
795 void
796 libzfs_mnttab_add(libzfs_handle_t *hdl, const char *special,
797 const char *mountp, const char *mntopts)
798 {
799 mnttab_node_t *mtn;
800
801 if (avl_numnodes(&hdl->libzfs_mnttab_cache) == 0)
802 return;
803 mtn = zfs_alloc(hdl, sizeof (mnttab_node_t));
804 mtn->mtn_mt.mnt_special = zfs_strdup(hdl, special);
805 mtn->mtn_mt.mnt_mountp = zfs_strdup(hdl, mountp);
806 mtn->mtn_mt.mnt_fstype = zfs_strdup(hdl, MNTTYPE_ZFS);
807 mtn->mtn_mt.mnt_mntopts = zfs_strdup(hdl, mntopts);
808 avl_add(&hdl->libzfs_mnttab_cache, mtn);
809 }
810
811 void
812 libzfs_mnttab_remove(libzfs_handle_t *hdl, const char *fsname)
813 {
814 mnttab_node_t find;
815 mnttab_node_t *ret;
816
817 find.mtn_mt.mnt_special = (char *)fsname;
818 if ((ret = avl_find(&hdl->libzfs_mnttab_cache, (void *)&find, NULL))) {
819 avl_remove(&hdl->libzfs_mnttab_cache, ret);
820 free(ret->mtn_mt.mnt_special);
821 free(ret->mtn_mt.mnt_mountp);
822 free(ret->mtn_mt.mnt_fstype);
823 free(ret->mtn_mt.mnt_mntopts);
824 free(ret);
825 }
826 }
827
828 int
829 zfs_spa_version(zfs_handle_t *zhp, int *spa_version)
830 {
831 zpool_handle_t *zpool_handle = zhp->zpool_hdl;
832
833 if (zpool_handle == NULL)
834 return (-1);
835
836 *spa_version = zpool_get_prop_int(zpool_handle,
837 ZPOOL_PROP_VERSION, NULL);
838 return (0);
839 }
840
841 /*
842 * The choice of reservation property depends on the SPA version.
843 */
844 static int
845 zfs_which_resv_prop(zfs_handle_t *zhp, zfs_prop_t *resv_prop)
846 {
847 int spa_version;
848
849 if (zfs_spa_version(zhp, &spa_version) < 0)
850 return (-1);
851
852 if (spa_version >= SPA_VERSION_REFRESERVATION)
853 *resv_prop = ZFS_PROP_REFRESERVATION;
854 else
855 *resv_prop = ZFS_PROP_RESERVATION;
856
857 return (0);
858 }
859
860 /*
861 * Given an nvlist of properties to set, validates that they are correct, and
862 * parses any numeric properties (index, boolean, etc) if they are specified as
863 * strings.
864 */
865 nvlist_t *
866 zfs_valid_proplist(libzfs_handle_t *hdl, zfs_type_t type, nvlist_t *nvl,
867 uint64_t zoned, zfs_handle_t *zhp, zpool_handle_t *zpool_hdl,
868 const char *errbuf)
869 {
870 nvpair_t *elem;
871 uint64_t intval;
872 char *strval;
873 zfs_prop_t prop;
874 nvlist_t *ret;
875 int chosen_normal = -1;
876 int chosen_utf = -1;
877
878 if (nvlist_alloc(&ret, NV_UNIQUE_NAME, 0) != 0) {
879 (void) no_memory(hdl);
880 return (NULL);
881 }
882
883 /*
884 * Make sure this property is valid and applies to this type.
885 */
886
887 elem = NULL;
888 while ((elem = nvlist_next_nvpair(nvl, elem)) != NULL) {
889 const char *propname = nvpair_name(elem);
890
891 prop = zfs_name_to_prop(propname);
892 if (prop == ZPROP_INVAL && zfs_prop_user(propname)) {
893 /*
894 * This is a user property: make sure it's a
895 * string, and that it's less than ZAP_MAXNAMELEN.
896 */
897 if (nvpair_type(elem) != DATA_TYPE_STRING) {
898 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
899 "'%s' must be a string"), propname);
900 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
901 goto error;
902 }
903
904 if (strlen(nvpair_name(elem)) >= ZAP_MAXNAMELEN) {
905 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
906 "property name '%s' is too long"),
907 propname);
908 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
909 goto error;
910 }
911
912 (void) nvpair_value_string(elem, &strval);
913 if (nvlist_add_string(ret, propname, strval) != 0) {
914 (void) no_memory(hdl);
915 goto error;
916 }
917 continue;
918 }
919
920 /*
921 * Currently, only user properties can be modified on
922 * snapshots.
923 */
924 if (type == ZFS_TYPE_SNAPSHOT) {
925 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
926 "this property can not be modified for snapshots"));
927 (void) zfs_error(hdl, EZFS_PROPTYPE, errbuf);
928 goto error;
929 }
930
931 if (prop == ZPROP_INVAL && zfs_prop_userquota(propname)) {
932 zfs_userquota_prop_t uqtype;
933 char newpropname[128];
934 char domain[128];
935 uint64_t rid;
936 uint64_t valary[3];
937
938 if (userquota_propname_decode(propname, zoned,
939 &uqtype, domain, sizeof (domain), &rid) != 0) {
940 zfs_error_aux(hdl,
941 dgettext(TEXT_DOMAIN,
942 "'%s' has an invalid user/group name"),
943 propname);
944 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
945 goto error;
946 }
947
948 if (uqtype != ZFS_PROP_USERQUOTA &&
949 uqtype != ZFS_PROP_GROUPQUOTA) {
950 zfs_error_aux(hdl,
951 dgettext(TEXT_DOMAIN, "'%s' is readonly"),
952 propname);
953 (void) zfs_error(hdl, EZFS_PROPREADONLY,
954 errbuf);
955 goto error;
956 }
957
958 if (nvpair_type(elem) == DATA_TYPE_STRING) {
959 (void) nvpair_value_string(elem, &strval);
960 if (strcmp(strval, "none") == 0) {
961 intval = 0;
962 } else if (zfs_nicestrtonum(hdl,
963 strval, &intval) != 0) {
964 (void) zfs_error(hdl,
965 EZFS_BADPROP, errbuf);
966 goto error;
967 }
968 } else if (nvpair_type(elem) ==
969 DATA_TYPE_UINT64) {
970 (void) nvpair_value_uint64(elem, &intval);
971 if (intval == 0) {
972 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
973 "use 'none' to disable "
974 "userquota/groupquota"));
975 goto error;
976 }
977 } else {
978 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
979 "'%s' must be a number"), propname);
980 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
981 goto error;
982 }
983
984 /*
985 * Encode the prop name as
986 * userquota@<hex-rid>-domain, to make it easy
987 * for the kernel to decode.
988 */
989 (void) snprintf(newpropname, sizeof (newpropname),
990 "%s%llx-%s", zfs_userquota_prop_prefixes[uqtype],
991 (longlong_t)rid, domain);
992 valary[0] = uqtype;
993 valary[1] = rid;
994 valary[2] = intval;
995 if (nvlist_add_uint64_array(ret, newpropname,
996 valary, 3) != 0) {
997 (void) no_memory(hdl);
998 goto error;
999 }
1000 continue;
1001 } else if (prop == ZPROP_INVAL && zfs_prop_written(propname)) {
1002 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1003 "'%s' is readonly"),
1004 propname);
1005 (void) zfs_error(hdl, EZFS_PROPREADONLY, errbuf);
1006 goto error;
1007 }
1008
1009 if (prop == ZPROP_INVAL) {
1010 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1011 "invalid property '%s'"), propname);
1012 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1013 goto error;
1014 }
1015
1016 if (!zfs_prop_valid_for_type(prop, type, B_FALSE)) {
1017 zfs_error_aux(hdl,
1018 dgettext(TEXT_DOMAIN, "'%s' does not "
1019 "apply to datasets of this type"), propname);
1020 (void) zfs_error(hdl, EZFS_PROPTYPE, errbuf);
1021 goto error;
1022 }
1023
1024 if (zfs_prop_readonly(prop) &&
1025 (!zfs_prop_setonce(prop) || zhp != NULL)) {
1026 zfs_error_aux(hdl,
1027 dgettext(TEXT_DOMAIN, "'%s' is readonly"),
1028 propname);
1029 (void) zfs_error(hdl, EZFS_PROPREADONLY, errbuf);
1030 goto error;
1031 }
1032
1033 if (zprop_parse_value(hdl, elem, prop, type, ret,
1034 &strval, &intval, errbuf) != 0)
1035 goto error;
1036
1037 /*
1038 * Perform some additional checks for specific properties.
1039 */
1040 switch (prop) {
1041 case ZFS_PROP_VERSION:
1042 {
1043 int version;
1044
1045 if (zhp == NULL)
1046 break;
1047 version = zfs_prop_get_int(zhp, ZFS_PROP_VERSION);
1048 if (intval < version) {
1049 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1050 "Can not downgrade; already at version %u"),
1051 version);
1052 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1053 goto error;
1054 }
1055 break;
1056 }
1057
1058 case ZFS_PROP_VOLBLOCKSIZE:
1059 case ZFS_PROP_RECORDSIZE:
1060 {
1061 int maxbs = SPA_MAXBLOCKSIZE;
1062 char buf[64];
1063
1064 if (zpool_hdl != NULL) {
1065 maxbs = zpool_get_prop_int(zpool_hdl,
1066 ZPOOL_PROP_MAXBLOCKSIZE, NULL);
1067 }
1068 /*
1069 * The value must be a power of two between
1070 * SPA_MINBLOCKSIZE and maxbs.
1071 */
1072 if (intval < SPA_MINBLOCKSIZE ||
1073 intval > maxbs || !ISP2(intval)) {
1074 zfs_nicenum(maxbs, buf, sizeof (buf));
1075 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1076 "'%s' must be power of 2 from 512B "
1077 "to %s"), propname, buf);
1078 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1079 goto error;
1080 }
1081 break;
1082 }
1083 case ZFS_PROP_MLSLABEL:
1084 {
1085 #ifdef HAVE_MLSLABEL
1086 /*
1087 * Verify the mlslabel string and convert to
1088 * internal hex label string.
1089 */
1090
1091 m_label_t *new_sl;
1092 char *hex = NULL; /* internal label string */
1093
1094 /* Default value is already OK. */
1095 if (strcasecmp(strval, ZFS_MLSLABEL_DEFAULT) == 0)
1096 break;
1097
1098 /* Verify the label can be converted to binary form */
1099 if (((new_sl = m_label_alloc(MAC_LABEL)) == NULL) ||
1100 (str_to_label(strval, &new_sl, MAC_LABEL,
1101 L_NO_CORRECTION, NULL) == -1)) {
1102 goto badlabel;
1103 }
1104
1105 /* Now translate to hex internal label string */
1106 if (label_to_str(new_sl, &hex, M_INTERNAL,
1107 DEF_NAMES) != 0) {
1108 if (hex)
1109 free(hex);
1110 goto badlabel;
1111 }
1112 m_label_free(new_sl);
1113
1114 /* If string is already in internal form, we're done. */
1115 if (strcmp(strval, hex) == 0) {
1116 free(hex);
1117 break;
1118 }
1119
1120 /* Replace the label string with the internal form. */
1121 (void) nvlist_remove(ret, zfs_prop_to_name(prop),
1122 DATA_TYPE_STRING);
1123 verify(nvlist_add_string(ret, zfs_prop_to_name(prop),
1124 hex) == 0);
1125 free(hex);
1126
1127 break;
1128
1129 badlabel:
1130 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1131 "invalid mlslabel '%s'"), strval);
1132 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1133 m_label_free(new_sl); /* OK if null */
1134 goto error;
1135 #else
1136 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1137 "mlslabels are unsupported"));
1138 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1139 goto error;
1140 #endif /* HAVE_MLSLABEL */
1141 }
1142
1143 case ZFS_PROP_MOUNTPOINT:
1144 {
1145 namecheck_err_t why;
1146
1147 if (strcmp(strval, ZFS_MOUNTPOINT_NONE) == 0 ||
1148 strcmp(strval, ZFS_MOUNTPOINT_LEGACY) == 0)
1149 break;
1150
1151 if (mountpoint_namecheck(strval, &why)) {
1152 switch (why) {
1153 case NAME_ERR_LEADING_SLASH:
1154 zfs_error_aux(hdl,
1155 dgettext(TEXT_DOMAIN,
1156 "'%s' must be an absolute path, "
1157 "'none', or 'legacy'"), propname);
1158 break;
1159 case NAME_ERR_TOOLONG:
1160 zfs_error_aux(hdl,
1161 dgettext(TEXT_DOMAIN,
1162 "component of '%s' is too long"),
1163 propname);
1164 break;
1165 default:
1166 break;
1167 }
1168 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1169 goto error;
1170 }
1171 }
1172
1173 /*FALLTHRU*/
1174
1175 case ZFS_PROP_SHARESMB:
1176 case ZFS_PROP_SHARENFS:
1177 /*
1178 * For the mountpoint and sharenfs or sharesmb
1179 * properties, check if it can be set in a
1180 * global/non-global zone based on
1181 * the zoned property value:
1182 *
1183 * global zone non-global zone
1184 * --------------------------------------------------
1185 * zoned=on mountpoint (no) mountpoint (yes)
1186 * sharenfs (no) sharenfs (no)
1187 * sharesmb (no) sharesmb (no)
1188 *
1189 * zoned=off mountpoint (yes) N/A
1190 * sharenfs (yes)
1191 * sharesmb (yes)
1192 */
1193 if (zoned) {
1194 if (getzoneid() == GLOBAL_ZONEID) {
1195 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1196 "'%s' cannot be set on "
1197 "dataset in a non-global zone"),
1198 propname);
1199 (void) zfs_error(hdl, EZFS_ZONED,
1200 errbuf);
1201 goto error;
1202 } else if (prop == ZFS_PROP_SHARENFS ||
1203 prop == ZFS_PROP_SHARESMB) {
1204 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1205 "'%s' cannot be set in "
1206 "a non-global zone"), propname);
1207 (void) zfs_error(hdl, EZFS_ZONED,
1208 errbuf);
1209 goto error;
1210 }
1211 } else if (getzoneid() != GLOBAL_ZONEID) {
1212 /*
1213 * If zoned property is 'off', this must be in
1214 * a global zone. If not, something is wrong.
1215 */
1216 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1217 "'%s' cannot be set while dataset "
1218 "'zoned' property is set"), propname);
1219 (void) zfs_error(hdl, EZFS_ZONED, errbuf);
1220 goto error;
1221 }
1222
1223 /*
1224 * At this point, it is legitimate to set the
1225 * property. Now we want to make sure that the
1226 * property value is valid if it is sharenfs.
1227 */
1228 if ((prop == ZFS_PROP_SHARENFS ||
1229 prop == ZFS_PROP_SHARESMB) &&
1230 strcmp(strval, "on") != 0 &&
1231 strcmp(strval, "off") != 0) {
1232 zfs_share_proto_t proto;
1233
1234 if (prop == ZFS_PROP_SHARESMB)
1235 proto = PROTO_SMB;
1236 else
1237 proto = PROTO_NFS;
1238
1239 /*
1240 * Must be an valid sharing protocol
1241 * option string so init the libshare
1242 * in order to enable the parser and
1243 * then parse the options. We use the
1244 * control API since we don't care about
1245 * the current configuration and don't
1246 * want the overhead of loading it
1247 * until we actually do something.
1248 */
1249
1250 if (zfs_init_libshare(hdl,
1251 SA_INIT_CONTROL_API) != SA_OK) {
1252 /*
1253 * An error occurred so we can't do
1254 * anything
1255 */
1256 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1257 "'%s' cannot be set: problem "
1258 "in share initialization"),
1259 propname);
1260 (void) zfs_error(hdl, EZFS_BADPROP,
1261 errbuf);
1262 goto error;
1263 }
1264
1265 if (zfs_parse_options(strval, proto) != SA_OK) {
1266 /*
1267 * There was an error in parsing so
1268 * deal with it by issuing an error
1269 * message and leaving after
1270 * uninitializing the the libshare
1271 * interface.
1272 */
1273 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1274 "'%s' cannot be set to invalid "
1275 "options"), propname);
1276 (void) zfs_error(hdl, EZFS_BADPROP,
1277 errbuf);
1278 zfs_uninit_libshare(hdl);
1279 goto error;
1280 }
1281 zfs_uninit_libshare(hdl);
1282 }
1283
1284 break;
1285 case ZFS_PROP_UTF8ONLY:
1286 chosen_utf = (int)intval;
1287 break;
1288 case ZFS_PROP_NORMALIZE:
1289 chosen_normal = (int)intval;
1290 break;
1291 default:
1292 break;
1293 }
1294
1295 /*
1296 * For changes to existing volumes, we have some additional
1297 * checks to enforce.
1298 */
1299 if (type == ZFS_TYPE_VOLUME && zhp != NULL) {
1300 uint64_t volsize = zfs_prop_get_int(zhp,
1301 ZFS_PROP_VOLSIZE);
1302 uint64_t blocksize = zfs_prop_get_int(zhp,
1303 ZFS_PROP_VOLBLOCKSIZE);
1304 char buf[64];
1305
1306 switch (prop) {
1307 case ZFS_PROP_RESERVATION:
1308 case ZFS_PROP_REFRESERVATION:
1309 if (intval > volsize) {
1310 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1311 "'%s' is greater than current "
1312 "volume size"), propname);
1313 (void) zfs_error(hdl, EZFS_BADPROP,
1314 errbuf);
1315 goto error;
1316 }
1317 break;
1318
1319 case ZFS_PROP_VOLSIZE:
1320 if (intval % blocksize != 0) {
1321 zfs_nicenum(blocksize, buf,
1322 sizeof (buf));
1323 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1324 "'%s' must be a multiple of "
1325 "volume block size (%s)"),
1326 propname, buf);
1327 (void) zfs_error(hdl, EZFS_BADPROP,
1328 errbuf);
1329 goto error;
1330 }
1331
1332 if (intval == 0) {
1333 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1334 "'%s' cannot be zero"),
1335 propname);
1336 (void) zfs_error(hdl, EZFS_BADPROP,
1337 errbuf);
1338 goto error;
1339 }
1340 break;
1341 default:
1342 break;
1343 }
1344 }
1345 }
1346
1347 /*
1348 * If normalization was chosen, but no UTF8 choice was made,
1349 * enforce rejection of non-UTF8 names.
1350 *
1351 * If normalization was chosen, but rejecting non-UTF8 names
1352 * was explicitly not chosen, it is an error.
1353 */
1354 if (chosen_normal > 0 && chosen_utf < 0) {
1355 if (nvlist_add_uint64(ret,
1356 zfs_prop_to_name(ZFS_PROP_UTF8ONLY), 1) != 0) {
1357 (void) no_memory(hdl);
1358 goto error;
1359 }
1360 } else if (chosen_normal > 0 && chosen_utf == 0) {
1361 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1362 "'%s' must be set 'on' if normalization chosen"),
1363 zfs_prop_to_name(ZFS_PROP_UTF8ONLY));
1364 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1365 goto error;
1366 }
1367 return (ret);
1368
1369 error:
1370 nvlist_free(ret);
1371 return (NULL);
1372 }
1373
1374 int
1375 zfs_add_synthetic_resv(zfs_handle_t *zhp, nvlist_t *nvl)
1376 {
1377 uint64_t old_volsize;
1378 uint64_t new_volsize;
1379 uint64_t old_reservation;
1380 uint64_t new_reservation;
1381 zfs_prop_t resv_prop;
1382 nvlist_t *props;
1383
1384 /*
1385 * If this is an existing volume, and someone is setting the volsize,
1386 * make sure that it matches the reservation, or add it if necessary.
1387 */
1388 old_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE);
1389 if (zfs_which_resv_prop(zhp, &resv_prop) < 0)
1390 return (-1);
1391 old_reservation = zfs_prop_get_int(zhp, resv_prop);
1392
1393 props = fnvlist_alloc();
1394 fnvlist_add_uint64(props, zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
1395 zfs_prop_get_int(zhp, ZFS_PROP_VOLBLOCKSIZE));
1396
1397 if ((zvol_volsize_to_reservation(old_volsize, props) !=
1398 old_reservation) || nvlist_exists(nvl,
1399 zfs_prop_to_name(resv_prop))) {
1400 fnvlist_free(props);
1401 return (0);
1402 }
1403 if (nvlist_lookup_uint64(nvl, zfs_prop_to_name(ZFS_PROP_VOLSIZE),
1404 &new_volsize) != 0) {
1405 fnvlist_free(props);
1406 return (-1);
1407 }
1408 new_reservation = zvol_volsize_to_reservation(new_volsize, props);
1409 fnvlist_free(props);
1410
1411 if (nvlist_add_uint64(nvl, zfs_prop_to_name(resv_prop),
1412 new_reservation) != 0) {
1413 (void) no_memory(zhp->zfs_hdl);
1414 return (-1);
1415 }
1416 return (1);
1417 }
1418
1419 void
1420 zfs_setprop_error(libzfs_handle_t *hdl, zfs_prop_t prop, int err,
1421 char *errbuf)
1422 {
1423 switch (err) {
1424
1425 case ENOSPC:
1426 /*
1427 * For quotas and reservations, ENOSPC indicates
1428 * something different; setting a quota or reservation
1429 * doesn't use any disk space.
1430 */
1431 switch (prop) {
1432 case ZFS_PROP_QUOTA:
1433 case ZFS_PROP_REFQUOTA:
1434 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1435 "size is less than current used or "
1436 "reserved space"));
1437 (void) zfs_error(hdl, EZFS_PROPSPACE, errbuf);
1438 break;
1439
1440 case ZFS_PROP_RESERVATION:
1441 case ZFS_PROP_REFRESERVATION:
1442 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1443 "size is greater than available space"));
1444 (void) zfs_error(hdl, EZFS_PROPSPACE, errbuf);
1445 break;
1446
1447 default:
1448 (void) zfs_standard_error(hdl, err, errbuf);
1449 break;
1450 }
1451 break;
1452
1453 case EBUSY:
1454 (void) zfs_standard_error(hdl, EBUSY, errbuf);
1455 break;
1456
1457 case EROFS:
1458 (void) zfs_error(hdl, EZFS_DSREADONLY, errbuf);
1459 break;
1460
1461 case E2BIG:
1462 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1463 "property value too long"));
1464 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1465 break;
1466
1467 case ENOTSUP:
1468 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1469 "pool and or dataset must be upgraded to set this "
1470 "property or value"));
1471 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf);
1472 break;
1473
1474 case ERANGE:
1475 if (prop == ZFS_PROP_COMPRESSION ||
1476 prop == ZFS_PROP_RECORDSIZE) {
1477 (void) zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1478 "property setting is not allowed on "
1479 "bootable datasets"));
1480 (void) zfs_error(hdl, EZFS_NOTSUP, errbuf);
1481 } else {
1482 (void) zfs_standard_error(hdl, err, errbuf);
1483 }
1484 break;
1485
1486 case EINVAL:
1487 if (prop == ZPROP_INVAL) {
1488 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1489 } else {
1490 (void) zfs_standard_error(hdl, err, errbuf);
1491 }
1492 break;
1493
1494 case EOVERFLOW:
1495 /*
1496 * This platform can't address a volume this big.
1497 */
1498 #ifdef _ILP32
1499 if (prop == ZFS_PROP_VOLSIZE) {
1500 (void) zfs_error(hdl, EZFS_VOLTOOBIG, errbuf);
1501 break;
1502 }
1503 #endif
1504 /* FALLTHROUGH */
1505 default:
1506 (void) zfs_standard_error(hdl, err, errbuf);
1507 }
1508 }
1509
1510 static boolean_t
1511 zfs_is_namespace_prop(zfs_prop_t prop)
1512 {
1513 switch (prop) {
1514
1515 case ZFS_PROP_ATIME:
1516 case ZFS_PROP_RELATIME:
1517 case ZFS_PROP_DEVICES:
1518 case ZFS_PROP_EXEC:
1519 case ZFS_PROP_SETUID:
1520 case ZFS_PROP_READONLY:
1521 case ZFS_PROP_XATTR:
1522 case ZFS_PROP_NBMAND:
1523 return (B_TRUE);
1524
1525 default:
1526 return (B_FALSE);
1527 }
1528 }
1529
1530 /*
1531 * Given a property name and value, set the property for the given dataset.
1532 */
1533 int
1534 zfs_prop_set(zfs_handle_t *zhp, const char *propname, const char *propval)
1535 {
1536 int ret = -1;
1537 char errbuf[1024];
1538 libzfs_handle_t *hdl = zhp->zfs_hdl;
1539 nvlist_t *nvl = NULL;
1540
1541 (void) snprintf(errbuf, sizeof (errbuf),
1542 dgettext(TEXT_DOMAIN, "cannot set property for '%s'"),
1543 zhp->zfs_name);
1544
1545 if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0 ||
1546 nvlist_add_string(nvl, propname, propval) != 0) {
1547 (void) no_memory(hdl);
1548 goto error;
1549 }
1550
1551 ret = zfs_prop_set_list(zhp, nvl);
1552
1553 error:
1554 nvlist_free(nvl);
1555 return (ret);
1556 }
1557
1558
1559
1560 /*
1561 * Given an nvlist of property names and values, set the properties for the
1562 * given dataset.
1563 */
1564 int
1565 zfs_prop_set_list(zfs_handle_t *zhp, nvlist_t *props)
1566 {
1567 zfs_cmd_t zc = {"\0"};
1568 int ret = -1;
1569 prop_changelist_t **cls = NULL;
1570 int cl_idx;
1571 char errbuf[1024];
1572 libzfs_handle_t *hdl = zhp->zfs_hdl;
1573 nvlist_t *nvl;
1574 int nvl_len;
1575 int added_resv = 0;
1576 zfs_prop_t prop = 0;
1577 nvpair_t *elem;
1578
1579 (void) snprintf(errbuf, sizeof (errbuf),
1580 dgettext(TEXT_DOMAIN, "cannot set property for '%s'"),
1581 zhp->zfs_name);
1582
1583 if ((nvl = zfs_valid_proplist(hdl, zhp->zfs_type, props,
1584 zfs_prop_get_int(zhp, ZFS_PROP_ZONED), zhp, zhp->zpool_hdl,
1585 errbuf)) == NULL)
1586 goto error;
1587
1588 /*
1589 * We have to check for any extra properties which need to be added
1590 * before computing the length of the nvlist.
1591 */
1592 for (elem = nvlist_next_nvpair(nvl, NULL);
1593 elem != NULL;
1594 elem = nvlist_next_nvpair(nvl, elem)) {
1595 if (zfs_name_to_prop(nvpair_name(elem)) == ZFS_PROP_VOLSIZE &&
1596 (added_resv = zfs_add_synthetic_resv(zhp, nvl)) == -1) {
1597 goto error;
1598 }
1599 }
1600 /*
1601 * Check how many properties we're setting and allocate an array to
1602 * store changelist pointers for postfix().
1603 */
1604 nvl_len = 0;
1605 for (elem = nvlist_next_nvpair(nvl, NULL);
1606 elem != NULL;
1607 elem = nvlist_next_nvpair(nvl, elem))
1608 nvl_len++;
1609 if ((cls = calloc(nvl_len, sizeof (prop_changelist_t *))) == NULL)
1610 goto error;
1611
1612 cl_idx = 0;
1613 for (elem = nvlist_next_nvpair(nvl, NULL);
1614 elem != NULL;
1615 elem = nvlist_next_nvpair(nvl, elem)) {
1616
1617 prop = zfs_name_to_prop(nvpair_name(elem));
1618
1619 assert(cl_idx < nvl_len);
1620 /*
1621 * We don't want to unmount & remount the dataset when changing
1622 * its canmount property to 'on' or 'noauto'. We only use
1623 * the changelist logic to unmount when setting canmount=off.
1624 */
1625 if (!(prop == ZFS_PROP_CANMOUNT &&
1626 fnvpair_value_uint64(elem) != ZFS_CANMOUNT_OFF)) {
1627 cls[cl_idx] = changelist_gather(zhp, prop, 0, 0);
1628 if (cls[cl_idx] == NULL)
1629 goto error;
1630 }
1631
1632 if (prop == ZFS_PROP_MOUNTPOINT &&
1633 changelist_haszonedchild(cls[cl_idx])) {
1634 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1635 "child dataset with inherited mountpoint is used "
1636 "in a non-global zone"));
1637 ret = zfs_error(hdl, EZFS_ZONED, errbuf);
1638 goto error;
1639 }
1640
1641 if (cls[cl_idx] != NULL &&
1642 (ret = changelist_prefix(cls[cl_idx])) != 0)
1643 goto error;
1644
1645 cl_idx++;
1646 }
1647 assert(cl_idx == nvl_len);
1648
1649 /*
1650 * Execute the corresponding ioctl() to set this list of properties.
1651 */
1652 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
1653
1654 if ((ret = zcmd_write_src_nvlist(hdl, &zc, nvl)) != 0 ||
1655 (ret = zcmd_alloc_dst_nvlist(hdl, &zc, 0)) != 0)
1656 goto error;
1657
1658 ret = zfs_ioctl(hdl, ZFS_IOC_SET_PROP, &zc);
1659
1660 if (ret != 0) {
1661 /* Get the list of unset properties back and report them. */
1662 nvlist_t *errorprops = NULL;
1663 if (zcmd_read_dst_nvlist(hdl, &zc, &errorprops) != 0)
1664 goto error;
1665 for (elem = nvlist_next_nvpair(nvl, NULL);
1666 elem != NULL;
1667 elem = nvlist_next_nvpair(nvl, elem)) {
1668 prop = zfs_name_to_prop(nvpair_name(elem));
1669 zfs_setprop_error(hdl, prop, errno, errbuf);
1670 }
1671 nvlist_free(errorprops);
1672
1673 if (added_resv && errno == ENOSPC) {
1674 /* clean up the volsize property we tried to set */
1675 uint64_t old_volsize = zfs_prop_get_int(zhp,
1676 ZFS_PROP_VOLSIZE);
1677 nvlist_free(nvl);
1678 nvl = NULL;
1679 zcmd_free_nvlists(&zc);
1680
1681 if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0)
1682 goto error;
1683 if (nvlist_add_uint64(nvl,
1684 zfs_prop_to_name(ZFS_PROP_VOLSIZE),
1685 old_volsize) != 0)
1686 goto error;
1687 if (zcmd_write_src_nvlist(hdl, &zc, nvl) != 0)
1688 goto error;
1689 (void) zfs_ioctl(hdl, ZFS_IOC_SET_PROP, &zc);
1690 }
1691 } else {
1692 for (cl_idx = 0; cl_idx < nvl_len; cl_idx++) {
1693 if (cls[cl_idx] != NULL) {
1694 int clp_err = changelist_postfix(cls[cl_idx]);
1695 if (clp_err != 0)
1696 ret = clp_err;
1697 }
1698 }
1699
1700 if (ret == 0) {
1701 /*
1702 * Refresh the statistics so the new property
1703 * value is reflected.
1704 */
1705 (void) get_stats(zhp);
1706
1707 /*
1708 * Remount the filesystem to propagate the change
1709 * if one of the options handled by the generic
1710 * Linux namespace layer has been modified.
1711 */
1712 if (zfs_is_namespace_prop(prop) &&
1713 zfs_is_mounted(zhp, NULL))
1714 ret = zfs_mount(zhp, MNTOPT_REMOUNT, 0);
1715 }
1716 }
1717
1718 error:
1719 nvlist_free(nvl);
1720 zcmd_free_nvlists(&zc);
1721 if (cls != NULL) {
1722 for (cl_idx = 0; cl_idx < nvl_len; cl_idx++) {
1723 if (cls[cl_idx] != NULL)
1724 changelist_free(cls[cl_idx]);
1725 }
1726 free(cls);
1727 }
1728 return (ret);
1729 }
1730
1731 /*
1732 * Given a property, inherit the value from the parent dataset, or if received
1733 * is TRUE, revert to the received value, if any.
1734 */
1735 int
1736 zfs_prop_inherit(zfs_handle_t *zhp, const char *propname, boolean_t received)
1737 {
1738 zfs_cmd_t zc = {"\0"};
1739 int ret;
1740 prop_changelist_t *cl;
1741 libzfs_handle_t *hdl = zhp->zfs_hdl;
1742 char errbuf[1024];
1743 zfs_prop_t prop;
1744
1745 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
1746 "cannot inherit %s for '%s'"), propname, zhp->zfs_name);
1747
1748 zc.zc_cookie = received;
1749 if ((prop = zfs_name_to_prop(propname)) == ZPROP_INVAL) {
1750 /*
1751 * For user properties, the amount of work we have to do is very
1752 * small, so just do it here.
1753 */
1754 if (!zfs_prop_user(propname)) {
1755 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1756 "invalid property"));
1757 return (zfs_error(hdl, EZFS_BADPROP, errbuf));
1758 }
1759
1760 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
1761 (void) strlcpy(zc.zc_value, propname, sizeof (zc.zc_value));
1762
1763 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_INHERIT_PROP, &zc) != 0)
1764 return (zfs_standard_error(hdl, errno, errbuf));
1765
1766 return (0);
1767 }
1768
1769 /*
1770 * Verify that this property is inheritable.
1771 */
1772 if (zfs_prop_readonly(prop))
1773 return (zfs_error(hdl, EZFS_PROPREADONLY, errbuf));
1774
1775 if (!zfs_prop_inheritable(prop) && !received)
1776 return (zfs_error(hdl, EZFS_PROPNONINHERIT, errbuf));
1777
1778 /*
1779 * Check to see if the value applies to this type
1780 */
1781 if (!zfs_prop_valid_for_type(prop, zhp->zfs_type, B_FALSE))
1782 return (zfs_error(hdl, EZFS_PROPTYPE, errbuf));
1783
1784 /*
1785 * Normalize the name, to get rid of shorthand abbreviations.
1786 */
1787 propname = zfs_prop_to_name(prop);
1788 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
1789 (void) strlcpy(zc.zc_value, propname, sizeof (zc.zc_value));
1790
1791 if (prop == ZFS_PROP_MOUNTPOINT && getzoneid() == GLOBAL_ZONEID &&
1792 zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) {
1793 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1794 "dataset is used in a non-global zone"));
1795 return (zfs_error(hdl, EZFS_ZONED, errbuf));
1796 }
1797
1798 /*
1799 * Determine datasets which will be affected by this change, if any.
1800 */
1801 if ((cl = changelist_gather(zhp, prop, 0, 0)) == NULL)
1802 return (-1);
1803
1804 if (prop == ZFS_PROP_MOUNTPOINT && changelist_haszonedchild(cl)) {
1805 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1806 "child dataset with inherited mountpoint is used "
1807 "in a non-global zone"));
1808 ret = zfs_error(hdl, EZFS_ZONED, errbuf);
1809 goto error;
1810 }
1811
1812 if ((ret = changelist_prefix(cl)) != 0)
1813 goto error;
1814
1815 if ((ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_INHERIT_PROP, &zc)) != 0) {
1816 return (zfs_standard_error(hdl, errno, errbuf));
1817 } else {
1818
1819 if ((ret = changelist_postfix(cl)) != 0)
1820 goto error;
1821
1822 /*
1823 * Refresh the statistics so the new property is reflected.
1824 */
1825 (void) get_stats(zhp);
1826
1827 /*
1828 * Remount the filesystem to propagate the change
1829 * if one of the options handled by the generic
1830 * Linux namespace layer has been modified.
1831 */
1832 if (zfs_is_namespace_prop(prop) &&
1833 zfs_is_mounted(zhp, NULL))
1834 ret = zfs_mount(zhp, MNTOPT_REMOUNT, 0);
1835 }
1836
1837 error:
1838 changelist_free(cl);
1839 return (ret);
1840 }
1841
1842 /*
1843 * True DSL properties are stored in an nvlist. The following two functions
1844 * extract them appropriately.
1845 */
1846 uint64_t
1847 getprop_uint64(zfs_handle_t *zhp, zfs_prop_t prop, char **source)
1848 {
1849 nvlist_t *nv;
1850 uint64_t value;
1851
1852 *source = NULL;
1853 if (nvlist_lookup_nvlist(zhp->zfs_props,
1854 zfs_prop_to_name(prop), &nv) == 0) {
1855 verify(nvlist_lookup_uint64(nv, ZPROP_VALUE, &value) == 0);
1856 (void) nvlist_lookup_string(nv, ZPROP_SOURCE, source);
1857 } else {
1858 verify(!zhp->zfs_props_table ||
1859 zhp->zfs_props_table[prop] == B_TRUE);
1860 value = zfs_prop_default_numeric(prop);
1861 *source = "";
1862 }
1863
1864 return (value);
1865 }
1866
1867 static char *
1868 getprop_string(zfs_handle_t *zhp, zfs_prop_t prop, char **source)
1869 {
1870 nvlist_t *nv;
1871 char *value;
1872
1873 *source = NULL;
1874 if (nvlist_lookup_nvlist(zhp->zfs_props,
1875 zfs_prop_to_name(prop), &nv) == 0) {
1876 verify(nvlist_lookup_string(nv, ZPROP_VALUE, &value) == 0);
1877 (void) nvlist_lookup_string(nv, ZPROP_SOURCE, source);
1878 } else {
1879 verify(!zhp->zfs_props_table ||
1880 zhp->zfs_props_table[prop] == B_TRUE);
1881 if ((value = (char *)zfs_prop_default_string(prop)) == NULL)
1882 value = "";
1883 *source = "";
1884 }
1885
1886 return (value);
1887 }
1888
1889 static boolean_t
1890 zfs_is_recvd_props_mode(zfs_handle_t *zhp)
1891 {
1892 return (zhp->zfs_props == zhp->zfs_recvd_props);
1893 }
1894
1895 static void
1896 zfs_set_recvd_props_mode(zfs_handle_t *zhp, uint64_t *cookie)
1897 {
1898 *cookie = (uint64_t)(uintptr_t)zhp->zfs_props;
1899 zhp->zfs_props = zhp->zfs_recvd_props;
1900 }
1901
1902 static void
1903 zfs_unset_recvd_props_mode(zfs_handle_t *zhp, uint64_t *cookie)
1904 {
1905 zhp->zfs_props = (nvlist_t *)(uintptr_t)*cookie;
1906 *cookie = 0;
1907 }
1908
1909 /*
1910 * Internal function for getting a numeric property. Both zfs_prop_get() and
1911 * zfs_prop_get_int() are built using this interface.
1912 *
1913 * Certain properties can be overridden using 'mount -o'. In this case, scan
1914 * the contents of the /etc/mtab entry, searching for the appropriate options.
1915 * If they differ from the on-disk values, report the current values and mark
1916 * the source "temporary".
1917 */
1918 static int
1919 get_numeric_property(zfs_handle_t *zhp, zfs_prop_t prop, zprop_source_t *src,
1920 char **source, uint64_t *val)
1921 {
1922 zfs_cmd_t zc = {"\0"};
1923 nvlist_t *zplprops = NULL;
1924 struct mnttab mnt;
1925 char *mntopt_on = NULL;
1926 char *mntopt_off = NULL;
1927 boolean_t received = zfs_is_recvd_props_mode(zhp);
1928
1929 *source = NULL;
1930
1931 /*
1932 * If the property is being fetched for a snapshot, check whether
1933 * the property is valid for the snapshot's head dataset type.
1934 */
1935 if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT &&
1936 !zfs_prop_valid_for_type(prop, zhp->zfs_head_type, B_TRUE)) {
1937 *val = zfs_prop_default_numeric(prop);
1938 return (-1);
1939 }
1940
1941 switch (prop) {
1942 case ZFS_PROP_ATIME:
1943 mntopt_on = MNTOPT_ATIME;
1944 mntopt_off = MNTOPT_NOATIME;
1945 break;
1946
1947 case ZFS_PROP_RELATIME:
1948 mntopt_on = MNTOPT_RELATIME;
1949 mntopt_off = MNTOPT_NORELATIME;
1950 break;
1951
1952 case ZFS_PROP_DEVICES:
1953 mntopt_on = MNTOPT_DEVICES;
1954 mntopt_off = MNTOPT_NODEVICES;
1955 break;
1956
1957 case ZFS_PROP_EXEC:
1958 mntopt_on = MNTOPT_EXEC;
1959 mntopt_off = MNTOPT_NOEXEC;
1960 break;
1961
1962 case ZFS_PROP_READONLY:
1963 mntopt_on = MNTOPT_RO;
1964 mntopt_off = MNTOPT_RW;
1965 break;
1966
1967 case ZFS_PROP_SETUID:
1968 mntopt_on = MNTOPT_SETUID;
1969 mntopt_off = MNTOPT_NOSETUID;
1970 break;
1971
1972 case ZFS_PROP_XATTR:
1973 mntopt_on = MNTOPT_XATTR;
1974 mntopt_off = MNTOPT_NOXATTR;
1975 break;
1976
1977 case ZFS_PROP_NBMAND:
1978 mntopt_on = MNTOPT_NBMAND;
1979 mntopt_off = MNTOPT_NONBMAND;
1980 break;
1981 default:
1982 break;
1983 }
1984
1985 /*
1986 * Because looking up the mount options is potentially expensive
1987 * (iterating over all of /etc/mtab), we defer its calculation until
1988 * we're looking up a property which requires its presence.
1989 */
1990 if (!zhp->zfs_mntcheck &&
1991 (mntopt_on != NULL || prop == ZFS_PROP_MOUNTED)) {
1992 libzfs_handle_t *hdl = zhp->zfs_hdl;
1993 struct mnttab entry;
1994
1995 if (libzfs_mnttab_find(hdl, zhp->zfs_name, &entry) == 0) {
1996 zhp->zfs_mntopts = zfs_strdup(hdl,
1997 entry.mnt_mntopts);
1998 if (zhp->zfs_mntopts == NULL)
1999 return (-1);
2000 }
2001
2002 zhp->zfs_mntcheck = B_TRUE;
2003 }
2004
2005 if (zhp->zfs_mntopts == NULL)
2006 mnt.mnt_mntopts = "";
2007 else
2008 mnt.mnt_mntopts = zhp->zfs_mntopts;
2009
2010 switch (prop) {
2011 case ZFS_PROP_ATIME:
2012 case ZFS_PROP_RELATIME:
2013 case ZFS_PROP_DEVICES:
2014 case ZFS_PROP_EXEC:
2015 case ZFS_PROP_READONLY:
2016 case ZFS_PROP_SETUID:
2017 case ZFS_PROP_XATTR:
2018 case ZFS_PROP_NBMAND:
2019 *val = getprop_uint64(zhp, prop, source);
2020
2021 if (received)
2022 break;
2023
2024 if (hasmntopt(&mnt, mntopt_on) && !*val) {
2025 *val = B_TRUE;
2026 if (src)
2027 *src = ZPROP_SRC_TEMPORARY;
2028 } else if (hasmntopt(&mnt, mntopt_off) && *val) {
2029 *val = B_FALSE;
2030 if (src)
2031 *src = ZPROP_SRC_TEMPORARY;
2032 }
2033 break;
2034
2035 case ZFS_PROP_CANMOUNT:
2036 case ZFS_PROP_VOLSIZE:
2037 case ZFS_PROP_QUOTA:
2038 case ZFS_PROP_REFQUOTA:
2039 case ZFS_PROP_RESERVATION:
2040 case ZFS_PROP_REFRESERVATION:
2041 case ZFS_PROP_FILESYSTEM_LIMIT:
2042 case ZFS_PROP_SNAPSHOT_LIMIT:
2043 case ZFS_PROP_FILESYSTEM_COUNT:
2044 case ZFS_PROP_SNAPSHOT_COUNT:
2045 *val = getprop_uint64(zhp, prop, source);
2046
2047 if (*source == NULL) {
2048 /* not default, must be local */
2049 *source = zhp->zfs_name;
2050 }
2051 break;
2052
2053 case ZFS_PROP_MOUNTED:
2054 *val = (zhp->zfs_mntopts != NULL);
2055 break;
2056
2057 case ZFS_PROP_NUMCLONES:
2058 *val = zhp->zfs_dmustats.dds_num_clones;
2059 break;
2060
2061 case ZFS_PROP_VERSION:
2062 case ZFS_PROP_NORMALIZE:
2063 case ZFS_PROP_UTF8ONLY:
2064 case ZFS_PROP_CASE:
2065 if (zcmd_alloc_dst_nvlist(zhp->zfs_hdl, &zc, 0) != 0)
2066 return (-1);
2067 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
2068 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_OBJSET_ZPLPROPS, &zc)) {
2069 zcmd_free_nvlists(&zc);
2070 if (prop == ZFS_PROP_VERSION &&
2071 zhp->zfs_type == ZFS_TYPE_VOLUME)
2072 *val = zfs_prop_default_numeric(prop);
2073 return (-1);
2074 }
2075 if (zcmd_read_dst_nvlist(zhp->zfs_hdl, &zc, &zplprops) != 0 ||
2076 nvlist_lookup_uint64(zplprops, zfs_prop_to_name(prop),
2077 val) != 0) {
2078 zcmd_free_nvlists(&zc);
2079 return (-1);
2080 }
2081 nvlist_free(zplprops);
2082 zcmd_free_nvlists(&zc);
2083 break;
2084
2085 case ZFS_PROP_INCONSISTENT:
2086 *val = zhp->zfs_dmustats.dds_inconsistent;
2087 break;
2088
2089 default:
2090 switch (zfs_prop_get_type(prop)) {
2091 case PROP_TYPE_NUMBER:
2092 case PROP_TYPE_INDEX:
2093 *val = getprop_uint64(zhp, prop, source);
2094 /*
2095 * If we tried to use a default value for a
2096 * readonly property, it means that it was not
2097 * present.
2098 */
2099 if (zfs_prop_readonly(prop) &&
2100 *source != NULL && (*source)[0] == '\0') {
2101 *source = NULL;
2102 }
2103 break;
2104
2105 case PROP_TYPE_STRING:
2106 default:
2107 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
2108 "cannot get non-numeric property"));
2109 return (zfs_error(zhp->zfs_hdl, EZFS_BADPROP,
2110 dgettext(TEXT_DOMAIN, "internal error")));
2111 }
2112 }
2113
2114 return (0);
2115 }
2116
2117 /*
2118 * Calculate the source type, given the raw source string.
2119 */
2120 static void
2121 get_source(zfs_handle_t *zhp, zprop_source_t *srctype, char *source,
2122 char *statbuf, size_t statlen)
2123 {
2124 if (statbuf == NULL || *srctype == ZPROP_SRC_TEMPORARY)
2125 return;
2126
2127 if (source == NULL) {
2128 *srctype = ZPROP_SRC_NONE;
2129 } else if (source[0] == '\0') {
2130 *srctype = ZPROP_SRC_DEFAULT;
2131 } else if (strstr(source, ZPROP_SOURCE_VAL_RECVD) != NULL) {
2132 *srctype = ZPROP_SRC_RECEIVED;
2133 } else {
2134 if (strcmp(source, zhp->zfs_name) == 0) {
2135 *srctype = ZPROP_SRC_LOCAL;
2136 } else {
2137 (void) strlcpy(statbuf, source, statlen);
2138 *srctype = ZPROP_SRC_INHERITED;
2139 }
2140 }
2141
2142 }
2143
2144 int
2145 zfs_prop_get_recvd(zfs_handle_t *zhp, const char *propname, char *propbuf,
2146 size_t proplen, boolean_t literal)
2147 {
2148 zfs_prop_t prop;
2149 int err = 0;
2150
2151 if (zhp->zfs_recvd_props == NULL)
2152 if (get_recvd_props_ioctl(zhp) != 0)
2153 return (-1);
2154
2155 prop = zfs_name_to_prop(propname);
2156
2157 if (prop != ZPROP_INVAL) {
2158 uint64_t cookie;
2159 if (!nvlist_exists(zhp->zfs_recvd_props, propname))
2160 return (-1);
2161 zfs_set_recvd_props_mode(zhp, &cookie);
2162 err = zfs_prop_get(zhp, prop, propbuf, proplen,
2163 NULL, NULL, 0, literal);
2164 zfs_unset_recvd_props_mode(zhp, &cookie);
2165 } else {
2166 nvlist_t *propval;
2167 char *recvdval;
2168 if (nvlist_lookup_nvlist(zhp->zfs_recvd_props,
2169 propname, &propval) != 0)
2170 return (-1);
2171 verify(nvlist_lookup_string(propval, ZPROP_VALUE,
2172 &recvdval) == 0);
2173 (void) strlcpy(propbuf, recvdval, proplen);
2174 }
2175
2176 return (err == 0 ? 0 : -1);
2177 }
2178
2179 static int
2180 get_clones_string(zfs_handle_t *zhp, char *propbuf, size_t proplen)
2181 {
2182 nvlist_t *value;
2183 nvpair_t *pair;
2184
2185 value = zfs_get_clones_nvl(zhp);
2186 if (value == NULL)
2187 return (-1);
2188
2189 propbuf[0] = '\0';
2190 for (pair = nvlist_next_nvpair(value, NULL); pair != NULL;
2191 pair = nvlist_next_nvpair(value, pair)) {
2192 if (propbuf[0] != '\0')
2193 (void) strlcat(propbuf, ",", proplen);
2194 (void) strlcat(propbuf, nvpair_name(pair), proplen);
2195 }
2196
2197 return (0);
2198 }
2199
2200 struct get_clones_arg {
2201 uint64_t numclones;
2202 nvlist_t *value;
2203 const char *origin;
2204 char buf[ZFS_MAXNAMELEN];
2205 };
2206
2207 int
2208 get_clones_cb(zfs_handle_t *zhp, void *arg)
2209 {
2210 struct get_clones_arg *gca = arg;
2211
2212 if (gca->numclones == 0) {
2213 zfs_close(zhp);
2214 return (0);
2215 }
2216
2217 if (zfs_prop_get(zhp, ZFS_PROP_ORIGIN, gca->buf, sizeof (gca->buf),
2218 NULL, NULL, 0, B_TRUE) != 0)
2219 goto out;
2220 if (strcmp(gca->buf, gca->origin) == 0) {
2221 fnvlist_add_boolean(gca->value, zfs_get_name(zhp));
2222 gca->numclones--;
2223 }
2224
2225 out:
2226 (void) zfs_iter_children(zhp, get_clones_cb, gca);
2227 zfs_close(zhp);
2228 return (0);
2229 }
2230
2231 nvlist_t *
2232 zfs_get_clones_nvl(zfs_handle_t *zhp)
2233 {
2234 nvlist_t *nv, *value;
2235
2236 if (nvlist_lookup_nvlist(zhp->zfs_props,
2237 zfs_prop_to_name(ZFS_PROP_CLONES), &nv) != 0) {
2238 struct get_clones_arg gca;
2239
2240 /*
2241 * if this is a snapshot, then the kernel wasn't able
2242 * to get the clones. Do it by slowly iterating.
2243 */
2244 if (zhp->zfs_type != ZFS_TYPE_SNAPSHOT)
2245 return (NULL);
2246 if (nvlist_alloc(&nv, NV_UNIQUE_NAME, 0) != 0)
2247 return (NULL);
2248 if (nvlist_alloc(&value, NV_UNIQUE_NAME, 0) != 0) {
2249 nvlist_free(nv);
2250 return (NULL);
2251 }
2252
2253 gca.numclones = zfs_prop_get_int(zhp, ZFS_PROP_NUMCLONES);
2254 gca.value = value;
2255 gca.origin = zhp->zfs_name;
2256
2257 if (gca.numclones != 0) {
2258 zfs_handle_t *root;
2259 char pool[ZFS_MAXNAMELEN];
2260 char *cp = pool;
2261
2262 /* get the pool name */
2263 (void) strlcpy(pool, zhp->zfs_name, sizeof (pool));
2264 (void) strsep(&cp, "/@");
2265 root = zfs_open(zhp->zfs_hdl, pool,
2266 ZFS_TYPE_FILESYSTEM);
2267
2268 (void) get_clones_cb(root, &gca);
2269 }
2270
2271 if (gca.numclones != 0 ||
2272 nvlist_add_nvlist(nv, ZPROP_VALUE, value) != 0 ||
2273 nvlist_add_nvlist(zhp->zfs_props,
2274 zfs_prop_to_name(ZFS_PROP_CLONES), nv) != 0) {
2275 nvlist_free(nv);
2276 nvlist_free(value);
2277 return (NULL);
2278 }
2279 nvlist_free(nv);
2280 nvlist_free(value);
2281 verify(0 == nvlist_lookup_nvlist(zhp->zfs_props,
2282 zfs_prop_to_name(ZFS_PROP_CLONES), &nv));
2283 }
2284
2285 verify(nvlist_lookup_nvlist(nv, ZPROP_VALUE, &value) == 0);
2286
2287 return (value);
2288 }
2289
2290 /*
2291 * Retrieve a property from the given object. If 'literal' is specified, then
2292 * numbers are left as exact values. Otherwise, numbers are converted to a
2293 * human-readable form.
2294 *
2295 * Returns 0 on success, or -1 on error.
2296 */
2297 int
2298 zfs_prop_get(zfs_handle_t *zhp, zfs_prop_t prop, char *propbuf, size_t proplen,
2299 zprop_source_t *src, char *statbuf, size_t statlen, boolean_t literal)
2300 {
2301 char *source = NULL;
2302 uint64_t val;
2303 char *str;
2304 const char *strval;
2305 boolean_t received = zfs_is_recvd_props_mode(zhp);
2306
2307 /*
2308 * Check to see if this property applies to our object
2309 */
2310 if (!zfs_prop_valid_for_type(prop, zhp->zfs_type, B_FALSE))
2311 return (-1);
2312
2313 if (received && zfs_prop_readonly(prop))
2314 return (-1);
2315
2316 if (src)
2317 *src = ZPROP_SRC_NONE;
2318
2319 switch (prop) {
2320 case ZFS_PROP_CREATION:
2321 /*
2322 * 'creation' is a time_t stored in the statistics. We convert
2323 * this into a string unless 'literal' is specified.
2324 */
2325 {
2326 val = getprop_uint64(zhp, prop, &source);
2327 time_t time = (time_t)val;
2328 struct tm t;
2329
2330 if (literal ||
2331 localtime_r(&time, &t) == NULL ||
2332 strftime(propbuf, proplen, "%a %b %e %k:%M %Y",
2333 &t) == 0)
2334 (void) snprintf(propbuf, proplen, "%llu",
2335 (u_longlong_t) val);
2336 }
2337 break;
2338
2339 case ZFS_PROP_MOUNTPOINT:
2340 /*
2341 * Getting the precise mountpoint can be tricky.
2342 *
2343 * - for 'none' or 'legacy', return those values.
2344 * - for inherited mountpoints, we want to take everything
2345 * after our ancestor and append it to the inherited value.
2346 *
2347 * If the pool has an alternate root, we want to prepend that
2348 * root to any values we return.
2349 */
2350
2351 str = getprop_string(zhp, prop, &source);
2352
2353 if (str[0] == '/') {
2354 char buf[MAXPATHLEN];
2355 char *root = buf;
2356 const char *relpath;
2357
2358 /*
2359 * If we inherit the mountpoint, even from a dataset
2360 * with a received value, the source will be the path of
2361 * the dataset we inherit from. If source is
2362 * ZPROP_SOURCE_VAL_RECVD, the received value is not
2363 * inherited.
2364 */
2365 if (strcmp(source, ZPROP_SOURCE_VAL_RECVD) == 0) {
2366 relpath = "";
2367 } else {
2368 relpath = zhp->zfs_name + strlen(source);
2369 if (relpath[0] == '/')
2370 relpath++;
2371 }
2372
2373 if ((zpool_get_prop(zhp->zpool_hdl,
2374 ZPOOL_PROP_ALTROOT, buf, MAXPATHLEN, NULL,
2375 B_FALSE)) || (strcmp(root, "-") == 0))
2376 root[0] = '\0';
2377 /*
2378 * Special case an alternate root of '/'. This will
2379 * avoid having multiple leading slashes in the
2380 * mountpoint path.
2381 */
2382 if (strcmp(root, "/") == 0)
2383 root++;
2384
2385 /*
2386 * If the mountpoint is '/' then skip over this
2387 * if we are obtaining either an alternate root or
2388 * an inherited mountpoint.
2389 */
2390 if (str[1] == '\0' && (root[0] != '\0' ||
2391 relpath[0] != '\0'))
2392 str++;
2393
2394 if (relpath[0] == '\0')
2395 (void) snprintf(propbuf, proplen, "%s%s",
2396 root, str);
2397 else
2398 (void) snprintf(propbuf, proplen, "%s%s%s%s",
2399 root, str, relpath[0] == '@' ? "" : "/",
2400 relpath);
2401 } else {
2402 /* 'legacy' or 'none' */
2403 (void) strlcpy(propbuf, str, proplen);
2404 }
2405
2406 break;
2407
2408 case ZFS_PROP_ORIGIN:
2409 (void) strlcpy(propbuf, getprop_string(zhp, prop, &source),
2410 proplen);
2411 /*
2412 * If there is no parent at all, return failure to indicate that
2413 * it doesn't apply to this dataset.
2414 */
2415 if (propbuf[0] == '\0')
2416 return (-1);
2417 break;
2418
2419 case ZFS_PROP_CLONES:
2420 if (get_clones_string(zhp, propbuf, proplen) != 0)
2421 return (-1);
2422 break;
2423
2424 case ZFS_PROP_QUOTA:
2425 case ZFS_PROP_REFQUOTA:
2426 case ZFS_PROP_RESERVATION:
2427 case ZFS_PROP_REFRESERVATION:
2428
2429 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2430 return (-1);
2431
2432 /*
2433 * If quota or reservation is 0, we translate this into 'none'
2434 * (unless literal is set), and indicate that it's the default
2435 * value. Otherwise, we print the number nicely and indicate
2436 * that its set locally.
2437 */
2438 if (val == 0) {
2439 if (literal)
2440 (void) strlcpy(propbuf, "0", proplen);
2441 else
2442 (void) strlcpy(propbuf, "none", proplen);
2443 } else {
2444 if (literal)
2445 (void) snprintf(propbuf, proplen, "%llu",
2446 (u_longlong_t)val);
2447 else
2448 zfs_nicenum(val, propbuf, proplen);
2449 }
2450 break;
2451
2452 case ZFS_PROP_FILESYSTEM_LIMIT:
2453 case ZFS_PROP_SNAPSHOT_LIMIT:
2454 case ZFS_PROP_FILESYSTEM_COUNT:
2455 case ZFS_PROP_SNAPSHOT_COUNT:
2456
2457 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2458 return (-1);
2459
2460 /*
2461 * If limit is UINT64_MAX, we translate this into 'none' (unless
2462 * literal is set), and indicate that it's the default value.
2463 * Otherwise, we print the number nicely and indicate that it's
2464 * set locally.
2465 */
2466 if (literal) {
2467 (void) snprintf(propbuf, proplen, "%llu",
2468 (u_longlong_t)val);
2469 } else if (val == UINT64_MAX) {
2470 (void) strlcpy(propbuf, "none", proplen);
2471 } else {
2472 zfs_nicenum(val, propbuf, proplen);
2473 }
2474 break;
2475
2476 case ZFS_PROP_REFRATIO:
2477 case ZFS_PROP_COMPRESSRATIO:
2478 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2479 return (-1);
2480 (void) snprintf(propbuf, proplen, "%llu.%02llux",
2481 (u_longlong_t)(val / 100),
2482 (u_longlong_t)(val % 100));
2483 break;
2484
2485 case ZFS_PROP_TYPE:
2486 switch (zhp->zfs_type) {
2487 case ZFS_TYPE_FILESYSTEM:
2488 str = "filesystem";
2489 break;
2490 case ZFS_TYPE_VOLUME:
2491 str = "volume";
2492 break;
2493 case ZFS_TYPE_SNAPSHOT:
2494 str = "snapshot";
2495 break;
2496 case ZFS_TYPE_BOOKMARK:
2497 str = "bookmark";
2498 break;
2499 default:
2500 abort();
2501 }
2502 (void) snprintf(propbuf, proplen, "%s", str);
2503 break;
2504
2505 case ZFS_PROP_MOUNTED:
2506 /*
2507 * The 'mounted' property is a pseudo-property that described
2508 * whether the filesystem is currently mounted. Even though
2509 * it's a boolean value, the typical values of "on" and "off"
2510 * don't make sense, so we translate to "yes" and "no".
2511 */
2512 if (get_numeric_property(zhp, ZFS_PROP_MOUNTED,
2513 src, &source, &val) != 0)
2514 return (-1);
2515 if (val)
2516 (void) strlcpy(propbuf, "yes", proplen);
2517 else
2518 (void) strlcpy(propbuf, "no", proplen);
2519 break;
2520
2521 case ZFS_PROP_NAME:
2522 /*
2523 * The 'name' property is a pseudo-property derived from the
2524 * dataset name. It is presented as a real property to simplify
2525 * consumers.
2526 */
2527 (void) strlcpy(propbuf, zhp->zfs_name, proplen);
2528 break;
2529
2530 case ZFS_PROP_MLSLABEL:
2531 {
2532 #ifdef HAVE_MLSLABEL
2533 m_label_t *new_sl = NULL;
2534 char *ascii = NULL; /* human readable label */
2535
2536 (void) strlcpy(propbuf,
2537 getprop_string(zhp, prop, &source), proplen);
2538
2539 if (literal || (strcasecmp(propbuf,
2540 ZFS_MLSLABEL_DEFAULT) == 0))
2541 break;
2542
2543 /*
2544 * Try to translate the internal hex string to
2545 * human-readable output. If there are any
2546 * problems just use the hex string.
2547 */
2548
2549 if (str_to_label(propbuf, &new_sl, MAC_LABEL,
2550 L_NO_CORRECTION, NULL) == -1) {
2551 m_label_free(new_sl);
2552 break;
2553 }
2554
2555 if (label_to_str(new_sl, &ascii, M_LABEL,
2556 DEF_NAMES) != 0) {
2557 if (ascii)
2558 free(ascii);
2559 m_label_free(new_sl);
2560 break;
2561 }
2562 m_label_free(new_sl);
2563
2564 (void) strlcpy(propbuf, ascii, proplen);
2565 free(ascii);
2566 #else
2567 (void) strlcpy(propbuf,
2568 getprop_string(zhp, prop, &source), proplen);
2569 #endif /* HAVE_MLSLABEL */
2570 }
2571 break;
2572
2573 case ZFS_PROP_GUID:
2574 /*
2575 * GUIDs are stored as numbers, but they are identifiers.
2576 * We don't want them to be pretty printed, because pretty
2577 * printing mangles the ID into a truncated and useless value.
2578 */
2579 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2580 return (-1);
2581 (void) snprintf(propbuf, proplen, "%llu", (u_longlong_t)val);
2582 break;
2583
2584 default:
2585 switch (zfs_prop_get_type(prop)) {
2586 case PROP_TYPE_NUMBER:
2587 if (get_numeric_property(zhp, prop, src,
2588 &source, &val) != 0)
2589 return (-1);
2590 if (literal)
2591 (void) snprintf(propbuf, proplen, "%llu",
2592 (u_longlong_t)val);
2593 else
2594 zfs_nicenum(val, propbuf, proplen);
2595 break;
2596
2597 case PROP_TYPE_STRING:
2598 (void) strlcpy(propbuf,
2599 getprop_string(zhp, prop, &source), proplen);
2600 break;
2601
2602 case PROP_TYPE_INDEX:
2603 if (get_numeric_property(zhp, prop, src,
2604 &source, &val) != 0)
2605 return (-1);
2606 if (zfs_prop_index_to_string(prop, val, &strval) != 0)
2607 return (-1);
2608 (void) strlcpy(propbuf, strval, proplen);
2609 break;
2610
2611 default:
2612 abort();
2613 }
2614 }
2615
2616 get_source(zhp, src, source, statbuf, statlen);
2617
2618 return (0);
2619 }
2620
2621 /*
2622 * Utility function to get the given numeric property. Does no validation that
2623 * the given property is the appropriate type; should only be used with
2624 * hard-coded property types.
2625 */
2626 uint64_t
2627 zfs_prop_get_int(zfs_handle_t *zhp, zfs_prop_t prop)
2628 {
2629 char *source;
2630 uint64_t val;
2631
2632 (void) get_numeric_property(zhp, prop, NULL, &source, &val);
2633
2634 return (val);
2635 }
2636
2637 int
2638 zfs_prop_set_int(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t val)
2639 {
2640 char buf[64];
2641
2642 (void) snprintf(buf, sizeof (buf), "%llu", (longlong_t)val);
2643 return (zfs_prop_set(zhp, zfs_prop_to_name(prop), buf));
2644 }
2645
2646 /*
2647 * Similar to zfs_prop_get(), but returns the value as an integer.
2648 */
2649 int
2650 zfs_prop_get_numeric(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t *value,
2651 zprop_source_t *src, char *statbuf, size_t statlen)
2652 {
2653 char *source;
2654
2655 /*
2656 * Check to see if this property applies to our object
2657 */
2658 if (!zfs_prop_valid_for_type(prop, zhp->zfs_type, B_FALSE)) {
2659 return (zfs_error_fmt(zhp->zfs_hdl, EZFS_PROPTYPE,
2660 dgettext(TEXT_DOMAIN, "cannot get property '%s'"),
2661 zfs_prop_to_name(prop)));
2662 }
2663
2664 if (src)
2665 *src = ZPROP_SRC_NONE;
2666
2667 if (get_numeric_property(zhp, prop, src, &source, value) != 0)
2668 return (-1);
2669
2670 get_source(zhp, src, source, statbuf, statlen);
2671
2672 return (0);
2673 }
2674
2675 #ifdef HAVE_IDMAP
2676 static int
2677 idmap_id_to_numeric_domain_rid(uid_t id, boolean_t isuser,
2678 char **domainp, idmap_rid_t *ridp)
2679 {
2680 idmap_get_handle_t *get_hdl = NULL;
2681 idmap_stat status;
2682 int err = EINVAL;
2683
2684 if (idmap_get_create(&get_hdl) != IDMAP_SUCCESS)
2685 goto out;
2686
2687 if (isuser) {
2688 err = idmap_get_sidbyuid(get_hdl, id,
2689 IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status);
2690 } else {
2691 err = idmap_get_sidbygid(get_hdl, id,
2692 IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status);
2693 }
2694 if (err == IDMAP_SUCCESS &&
2695 idmap_get_mappings(get_hdl) == IDMAP_SUCCESS &&
2696 status == IDMAP_SUCCESS)
2697 err = 0;
2698 else
2699 err = EINVAL;
2700 out:
2701 if (get_hdl)
2702 idmap_get_destroy(get_hdl);
2703 return (err);
2704 }
2705 #endif /* HAVE_IDMAP */
2706
2707 /*
2708 * convert the propname into parameters needed by kernel
2709 * Eg: userquota@ahrens -> ZFS_PROP_USERQUOTA, "", 126829
2710 * Eg: userused@matt@domain -> ZFS_PROP_USERUSED, "S-1-123-456", 789
2711 * Eg: groupquota@staff -> ZFS_PROP_GROUPQUOTA, "", 1234
2712 * Eg: groupused@staff -> ZFS_PROP_GROUPUSED, "", 1234
2713 */
2714 static int
2715 userquota_propname_decode(const char *propname, boolean_t zoned,
2716 zfs_userquota_prop_t *typep, char *domain, int domainlen, uint64_t *ridp)
2717 {
2718 zfs_userquota_prop_t type;
2719 char *cp;
2720 boolean_t isuser;
2721 boolean_t isgroup;
2722 struct passwd *pw;
2723 struct group *gr;
2724
2725 domain[0] = '\0';
2726
2727 /* Figure out the property type ({user|group}{quota|space}) */
2728 for (type = 0; type < ZFS_NUM_USERQUOTA_PROPS; type++) {
2729 if (strncmp(propname, zfs_userquota_prop_prefixes[type],
2730 strlen(zfs_userquota_prop_prefixes[type])) == 0)
2731 break;
2732 }
2733 if (type == ZFS_NUM_USERQUOTA_PROPS)
2734 return (EINVAL);
2735 *typep = type;
2736
2737 isuser = (type == ZFS_PROP_USERQUOTA || type == ZFS_PROP_USERUSED);
2738 isgroup = (type == ZFS_PROP_GROUPQUOTA || type == ZFS_PROP_GROUPUSED);
2739
2740 cp = strchr(propname, '@') + 1;
2741
2742 if (isuser && (pw = getpwnam(cp)) != NULL) {
2743 if (zoned && getzoneid() == GLOBAL_ZONEID)
2744 return (ENOENT);
2745 *ridp = pw->pw_uid;
2746 } else if (isgroup && (gr = getgrnam(cp)) != NULL) {
2747 if (zoned && getzoneid() == GLOBAL_ZONEID)
2748 return (ENOENT);
2749 *ridp = gr->gr_gid;
2750 } else if (strchr(cp, '@')) {
2751 #ifdef HAVE_IDMAP
2752 /*
2753 * It's a SID name (eg "user@domain") that needs to be
2754 * turned into S-1-domainID-RID.
2755 */
2756 directory_error_t e;
2757 char *numericsid = NULL;
2758 char *end;
2759
2760 if (zoned && getzoneid() == GLOBAL_ZONEID)
2761 return (ENOENT);
2762 if (isuser) {
2763 e = directory_sid_from_user_name(NULL,
2764 cp, &numericsid);
2765 } else {
2766 e = directory_sid_from_group_name(NULL,
2767 cp, &numericsid);
2768 }
2769 if (e != NULL) {
2770 directory_error_free(e);
2771 return (ENOENT);
2772 }
2773 if (numericsid == NULL)
2774 return (ENOENT);
2775 cp = numericsid;
2776 (void) strlcpy(domain, cp, domainlen);
2777 cp = strrchr(domain, '-');
2778 *cp = '\0';
2779 cp++;
2780
2781 errno = 0;
2782 *ridp = strtoull(cp, &end, 10);
2783 free(numericsid);
2784
2785 if (errno != 0 || *end != '\0')
2786 return (EINVAL);
2787 #else
2788 return (ENOSYS);
2789 #endif /* HAVE_IDMAP */
2790 } else {
2791 /* It's a user/group ID (eg "12345"). */
2792 uid_t id;
2793 char *end;
2794 id = strtoul(cp, &end, 10);
2795 if (*end != '\0')
2796 return (EINVAL);
2797 if (id > MAXUID) {
2798 #ifdef HAVE_IDMAP
2799 /* It's an ephemeral ID. */
2800 idmap_rid_t rid;
2801 char *mapdomain;
2802
2803 if (idmap_id_to_numeric_domain_rid(id, isuser,
2804 &mapdomain, &rid) != 0)
2805 return (ENOENT);
2806 (void) strlcpy(domain, mapdomain, domainlen);
2807 *ridp = rid;
2808 #else
2809 return (ENOSYS);
2810 #endif /* HAVE_IDMAP */
2811 } else {
2812 *ridp = id;
2813 }
2814 }
2815
2816 return (0);
2817 }
2818
2819 static int
2820 zfs_prop_get_userquota_common(zfs_handle_t *zhp, const char *propname,
2821 uint64_t *propvalue, zfs_userquota_prop_t *typep)
2822 {
2823 int err;
2824 zfs_cmd_t zc = {"\0"};
2825
2826 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
2827
2828 err = userquota_propname_decode(propname,
2829 zfs_prop_get_int(zhp, ZFS_PROP_ZONED),
2830 typep, zc.zc_value, sizeof (zc.zc_value), &zc.zc_guid);
2831 zc.zc_objset_type = *typep;
2832 if (err)
2833 return (err);
2834
2835 err = ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_USERSPACE_ONE, &zc);
2836 if (err)
2837 return (err);
2838
2839 *propvalue = zc.zc_cookie;
2840 return (0);
2841 }
2842
2843 int
2844 zfs_prop_get_userquota_int(zfs_handle_t *zhp, const char *propname,
2845 uint64_t *propvalue)
2846 {
2847 zfs_userquota_prop_t type;
2848
2849 return (zfs_prop_get_userquota_common(zhp, propname, propvalue,
2850 &type));
2851 }
2852
2853 int
2854 zfs_prop_get_userquota(zfs_handle_t *zhp, const char *propname,
2855 char *propbuf, int proplen, boolean_t literal)
2856 {
2857 int err;
2858 uint64_t propvalue;
2859 zfs_userquota_prop_t type;
2860
2861 err = zfs_prop_get_userquota_common(zhp, propname, &propvalue,
2862 &type);
2863
2864 if (err)
2865 return (err);
2866
2867 if (literal) {
2868 (void) snprintf(propbuf, proplen, "%llu",
2869 (u_longlong_t)propvalue);
2870 } else if (propvalue == 0 &&
2871 (type == ZFS_PROP_USERQUOTA || type == ZFS_PROP_GROUPQUOTA)) {
2872 (void) strlcpy(propbuf, "none", proplen);
2873 } else {
2874 zfs_nicenum(propvalue, propbuf, proplen);
2875 }
2876 return (0);
2877 }
2878
2879 int
2880 zfs_prop_get_written_int(zfs_handle_t *zhp, const char *propname,
2881 uint64_t *propvalue)
2882 {
2883 int err;
2884 zfs_cmd_t zc = {"\0"};
2885 const char *snapname;
2886
2887 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
2888
2889 snapname = strchr(propname, '@') + 1;
2890 if (strchr(snapname, '@')) {
2891 (void) strlcpy(zc.zc_value, snapname, sizeof (zc.zc_value));
2892 } else {
2893 /* snapname is the short name, append it to zhp's fsname */
2894 char *cp;
2895
2896 (void) strlcpy(zc.zc_value, zhp->zfs_name,
2897 sizeof (zc.zc_value));
2898 cp = strchr(zc.zc_value, '@');
2899 if (cp != NULL)
2900 *cp = '\0';
2901 (void) strlcat(zc.zc_value, "@", sizeof (zc.zc_value));
2902 (void) strlcat(zc.zc_value, snapname, sizeof (zc.zc_value));
2903 }
2904
2905 err = ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_SPACE_WRITTEN, &zc);
2906 if (err)
2907 return (err);
2908
2909 *propvalue = zc.zc_cookie;
2910 return (0);
2911 }
2912
2913 int
2914 zfs_prop_get_written(zfs_handle_t *zhp, const char *propname,
2915 char *propbuf, int proplen, boolean_t literal)
2916 {
2917 int err;
2918 uint64_t propvalue;
2919
2920 err = zfs_prop_get_written_int(zhp, propname, &propvalue);
2921
2922 if (err)
2923 return (err);
2924
2925 if (literal) {
2926 (void) snprintf(propbuf, proplen, "%llu",
2927 (u_longlong_t)propvalue);
2928 } else {
2929 zfs_nicenum(propvalue, propbuf, proplen);
2930 }
2931
2932 return (0);
2933 }
2934
2935 /*
2936 * Returns the name of the given zfs handle.
2937 */
2938 const char *
2939 zfs_get_name(const zfs_handle_t *zhp)
2940 {
2941 return (zhp->zfs_name);
2942 }
2943
2944 /*
2945 * Returns the type of the given zfs handle.
2946 */
2947 zfs_type_t
2948 zfs_get_type(const zfs_handle_t *zhp)
2949 {
2950 return (zhp->zfs_type);
2951 }
2952
2953 /*
2954 * Is one dataset name a child dataset of another?
2955 *
2956 * Needs to handle these cases:
2957 * Dataset 1 "a/foo" "a/foo" "a/foo" "a/foo"
2958 * Dataset 2 "a/fo" "a/foobar" "a/bar/baz" "a/foo/bar"
2959 * Descendant? No. No. No. Yes.
2960 */
2961 static boolean_t
2962 is_descendant(const char *ds1, const char *ds2)
2963 {
2964 size_t d1len = strlen(ds1);
2965
2966 /* ds2 can't be a descendant if it's smaller */
2967 if (strlen(ds2) < d1len)
2968 return (B_FALSE);
2969
2970 /* otherwise, compare strings and verify that there's a '/' char */
2971 return (ds2[d1len] == '/' && (strncmp(ds1, ds2, d1len) == 0));
2972 }
2973
2974 /*
2975 * Given a complete name, return just the portion that refers to the parent.
2976 * Will return -1 if there is no parent (path is just the name of the
2977 * pool).
2978 */
2979 static int
2980 parent_name(const char *path, char *buf, size_t buflen)
2981 {
2982 char *slashp;
2983
2984 (void) strlcpy(buf, path, buflen);
2985
2986 if ((slashp = strrchr(buf, '/')) == NULL)
2987 return (-1);
2988 *slashp = '\0';
2989
2990 return (0);
2991 }
2992
2993 /*
2994 * If accept_ancestor is false, then check to make sure that the given path has
2995 * a parent, and that it exists. If accept_ancestor is true, then find the
2996 * closest existing ancestor for the given path. In prefixlen return the
2997 * length of already existing prefix of the given path. We also fetch the
2998 * 'zoned' property, which is used to validate property settings when creating
2999 * new datasets.
3000 */
3001 static int
3002 check_parents(libzfs_handle_t *hdl, const char *path, uint64_t *zoned,
3003 boolean_t accept_ancestor, int *prefixlen)
3004 {
3005 zfs_cmd_t zc = {"\0"};
3006 char parent[ZFS_MAXNAMELEN];
3007 char *slash;
3008 zfs_handle_t *zhp;
3009 char errbuf[1024];
3010 uint64_t is_zoned;
3011
3012 (void) snprintf(errbuf, sizeof (errbuf),
3013 dgettext(TEXT_DOMAIN, "cannot create '%s'"), path);
3014
3015 /* get parent, and check to see if this is just a pool */
3016 if (parent_name(path, parent, sizeof (parent)) != 0) {
3017 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3018 "missing dataset name"));
3019 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3020 }
3021
3022 /* check to see if the pool exists */
3023 if ((slash = strchr(parent, '/')) == NULL)
3024 slash = parent + strlen(parent);
3025 (void) strncpy(zc.zc_name, parent, slash - parent);
3026 zc.zc_name[slash - parent] = '\0';
3027 if (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_STATS, &zc) != 0 &&
3028 errno == ENOENT) {
3029 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3030 "no such pool '%s'"), zc.zc_name);
3031 return (zfs_error(hdl, EZFS_NOENT, errbuf));
3032 }
3033
3034 /* check to see if the parent dataset exists */
3035 while ((zhp = make_dataset_handle(hdl, parent)) == NULL) {
3036 if (errno == ENOENT && accept_ancestor) {
3037 /*
3038 * Go deeper to find an ancestor, give up on top level.
3039 */
3040 if (parent_name(parent, parent, sizeof (parent)) != 0) {
3041 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3042 "no such pool '%s'"), zc.zc_name);
3043 return (zfs_error(hdl, EZFS_NOENT, errbuf));
3044 }
3045 } else if (errno == ENOENT) {
3046 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3047 "parent does not exist"));
3048 return (zfs_error(hdl, EZFS_NOENT, errbuf));
3049 } else
3050 return (zfs_standard_error(hdl, errno, errbuf));
3051 }
3052
3053 is_zoned = zfs_prop_get_int(zhp, ZFS_PROP_ZONED);
3054 if (zoned != NULL)
3055 *zoned = is_zoned;
3056
3057 /* we are in a non-global zone, but parent is in the global zone */
3058 if (getzoneid() != GLOBAL_ZONEID && !is_zoned) {
3059 (void) zfs_standard_error(hdl, EPERM, errbuf);
3060 zfs_close(zhp);
3061 return (-1);
3062 }
3063
3064 /* make sure parent is a filesystem */
3065 if (zfs_get_type(zhp) != ZFS_TYPE_FILESYSTEM) {
3066 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3067 "parent is not a filesystem"));
3068 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
3069 zfs_close(zhp);
3070 return (-1);
3071 }
3072
3073 zfs_close(zhp);
3074 if (prefixlen != NULL)
3075 *prefixlen = strlen(parent);
3076 return (0);
3077 }
3078
3079 /*
3080 * Finds whether the dataset of the given type(s) exists.
3081 */
3082 boolean_t
3083 zfs_dataset_exists(libzfs_handle_t *hdl, const char *path, zfs_type_t types)
3084 {
3085 zfs_handle_t *zhp;
3086
3087 if (!zfs_validate_name(hdl, path, types, B_FALSE))
3088 return (B_FALSE);
3089
3090 /*
3091 * Try to get stats for the dataset, which will tell us if it exists.
3092 */
3093 if ((zhp = make_dataset_handle(hdl, path)) != NULL) {
3094 int ds_type = zhp->zfs_type;
3095
3096 zfs_close(zhp);
3097 if (types & ds_type)
3098 return (B_TRUE);
3099 }
3100 return (B_FALSE);
3101 }
3102
3103 /*
3104 * Given a path to 'target', create all the ancestors between
3105 * the prefixlen portion of the path, and the target itself.
3106 * Fail if the initial prefixlen-ancestor does not already exist.
3107 */
3108 int
3109 create_parents(libzfs_handle_t *hdl, char *target, int prefixlen)
3110 {
3111 zfs_handle_t *h;
3112 char *cp;
3113 const char *opname;
3114
3115 /* make sure prefix exists */
3116 cp = target + prefixlen;
3117 if (*cp != '/') {
3118 assert(strchr(cp, '/') == NULL);
3119 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM);
3120 } else {
3121 *cp = '\0';
3122 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM);
3123 *cp = '/';
3124 }
3125 if (h == NULL)
3126 return (-1);
3127 zfs_close(h);
3128
3129 /*
3130 * Attempt to create, mount, and share any ancestor filesystems,
3131 * up to the prefixlen-long one.
3132 */
3133 for (cp = target + prefixlen + 1;
3134 (cp = strchr(cp, '/')); *cp = '/', cp++) {
3135
3136 *cp = '\0';
3137
3138 h = make_dataset_handle(hdl, target);
3139 if (h) {
3140 /* it already exists, nothing to do here */
3141 zfs_close(h);
3142 continue;
3143 }
3144
3145 if (zfs_create(hdl, target, ZFS_TYPE_FILESYSTEM,
3146 NULL) != 0) {
3147 opname = dgettext(TEXT_DOMAIN, "create");
3148 goto ancestorerr;
3149 }
3150
3151 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM);
3152 if (h == NULL) {
3153 opname = dgettext(TEXT_DOMAIN, "open");
3154 goto ancestorerr;
3155 }
3156
3157 if (zfs_mount(h, NULL, 0) != 0) {
3158 opname = dgettext(TEXT_DOMAIN, "mount");
3159 goto ancestorerr;
3160 }
3161
3162 if (zfs_share(h) != 0) {
3163 opname = dgettext(TEXT_DOMAIN, "share");
3164 goto ancestorerr;
3165 }
3166
3167 zfs_close(h);
3168 }
3169
3170 return (0);
3171
3172 ancestorerr:
3173 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3174 "failed to %s ancestor '%s'"), opname, target);
3175 return (-1);
3176 }
3177
3178 /*
3179 * Creates non-existing ancestors of the given path.
3180 */
3181 int
3182 zfs_create_ancestors(libzfs_handle_t *hdl, const char *path)
3183 {
3184 int prefix;
3185 char *path_copy;
3186 int rc = 0;
3187
3188 if (check_parents(hdl, path, NULL, B_TRUE, &prefix) != 0)
3189 return (-1);
3190
3191 if ((path_copy = strdup(path)) != NULL) {
3192 rc = create_parents(hdl, path_copy, prefix);
3193 free(path_copy);
3194 }
3195 if (path_copy == NULL || rc != 0)
3196 return (-1);
3197
3198 return (0);
3199 }
3200
3201 /*
3202 * Create a new filesystem or volume.
3203 */
3204 int
3205 zfs_create(libzfs_handle_t *hdl, const char *path, zfs_type_t type,
3206 nvlist_t *props)
3207 {
3208 int ret;
3209 uint64_t size = 0;
3210 uint64_t blocksize = zfs_prop_default_numeric(ZFS_PROP_VOLBLOCKSIZE);
3211 char errbuf[1024];
3212 uint64_t zoned;
3213 dmu_objset_type_t ost;
3214
3215 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3216 "cannot create '%s'"), path);
3217
3218 /* validate the path, taking care to note the extended error message */
3219 if (!zfs_validate_name(hdl, path, type, B_TRUE))
3220 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3221
3222 /* validate parents exist */
3223 if (check_parents(hdl, path, &zoned, B_FALSE, NULL) != 0)
3224 return (-1);
3225
3226 /*
3227 * The failure modes when creating a dataset of a different type over
3228 * one that already exists is a little strange. In particular, if you
3229 * try to create a dataset on top of an existing dataset, the ioctl()
3230 * will return ENOENT, not EEXIST. To prevent this from happening, we
3231 * first try to see if the dataset exists.
3232 */
3233 if (zfs_dataset_exists(hdl, path, ZFS_TYPE_DATASET)) {
3234 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3235 "dataset already exists"));
3236 return (zfs_error(hdl, EZFS_EXISTS, errbuf));
3237 }
3238
3239 if (type == ZFS_TYPE_VOLUME)
3240 ost = DMU_OST_ZVOL;
3241 else
3242 ost = DMU_OST_ZFS;
3243
3244 /* open zpool handle for prop validation */
3245 char pool_path[MAXNAMELEN];
3246 (void) strlcpy(pool_path, path, sizeof (pool_path));
3247
3248 /* truncate pool_path at first slash */
3249 char *p = strchr(pool_path, '/');
3250 if (p != NULL)
3251 *p = '\0';
3252
3253 zpool_handle_t *zpool_handle = zpool_open(hdl, pool_path);
3254
3255 if (props && (props = zfs_valid_proplist(hdl, type, props,
3256 zoned, NULL, zpool_handle, errbuf)) == 0) {
3257 zpool_close(zpool_handle);
3258 return (-1);
3259 }
3260 zpool_close(zpool_handle);
3261
3262 if (type == ZFS_TYPE_VOLUME) {
3263 /*
3264 * If we are creating a volume, the size and block size must
3265 * satisfy a few restraints. First, the blocksize must be a
3266 * valid block size between SPA_{MIN,MAX}BLOCKSIZE. Second, the
3267 * volsize must be a multiple of the block size, and cannot be
3268 * zero.
3269 */
3270 if (props == NULL || nvlist_lookup_uint64(props,
3271 zfs_prop_to_name(ZFS_PROP_VOLSIZE), &size) != 0) {
3272 nvlist_free(props);
3273 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3274 "missing volume size"));
3275 return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3276 }
3277
3278 if ((ret = nvlist_lookup_uint64(props,
3279 zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
3280 &blocksize)) != 0) {
3281 if (ret == ENOENT) {
3282 blocksize = zfs_prop_default_numeric(
3283 ZFS_PROP_VOLBLOCKSIZE);
3284 } else {
3285 nvlist_free(props);
3286 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3287 "missing volume block size"));
3288 return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3289 }
3290 }
3291
3292 if (size == 0) {
3293 nvlist_free(props);
3294 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3295 "volume size cannot be zero"));
3296 return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3297 }
3298
3299 if (size % blocksize != 0) {
3300 nvlist_free(props);
3301 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3302 "volume size must be a multiple of volume block "
3303 "size"));
3304 return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3305 }
3306 }
3307
3308 /* create the dataset */
3309 ret = lzc_create(path, ost, props);
3310 nvlist_free(props);
3311
3312 /* check for failure */
3313 if (ret != 0) {
3314 char parent[ZFS_MAXNAMELEN];
3315 (void) parent_name(path, parent, sizeof (parent));
3316
3317 switch (errno) {
3318 case ENOENT:
3319 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3320 "no such parent '%s'"), parent);
3321 return (zfs_error(hdl, EZFS_NOENT, errbuf));
3322
3323 case EINVAL:
3324 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3325 "parent '%s' is not a filesystem"), parent);
3326 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
3327
3328 case ENOTSUP:
3329 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3330 "pool must be upgraded to set this "
3331 "property or value"));
3332 return (zfs_error(hdl, EZFS_BADVERSION, errbuf));
3333 #ifdef _ILP32
3334 case EOVERFLOW:
3335 /*
3336 * This platform can't address a volume this big.
3337 */
3338 if (type == ZFS_TYPE_VOLUME)
3339 return (zfs_error(hdl, EZFS_VOLTOOBIG,
3340 errbuf));
3341 #endif
3342 /* FALLTHROUGH */
3343 default:
3344 return (zfs_standard_error(hdl, errno, errbuf));
3345 }
3346 }
3347
3348 return (0);
3349 }
3350
3351 /*
3352 * Destroys the given dataset. The caller must make sure that the filesystem
3353 * isn't mounted, and that there are no active dependents. If the file system
3354 * does not exist this function does nothing.
3355 */
3356 int
3357 zfs_destroy(zfs_handle_t *zhp, boolean_t defer)
3358 {
3359 zfs_cmd_t zc = {"\0"};
3360
3361 if (zhp->zfs_type == ZFS_TYPE_BOOKMARK) {
3362 nvlist_t *nv = fnvlist_alloc();
3363 fnvlist_add_boolean(nv, zhp->zfs_name);
3364 int error = lzc_destroy_bookmarks(nv, NULL);
3365 fnvlist_free(nv);
3366 if (error != 0) {
3367 return (zfs_standard_error_fmt(zhp->zfs_hdl, errno,
3368 dgettext(TEXT_DOMAIN, "cannot destroy '%s'"),
3369 zhp->zfs_name));
3370 }
3371 return (0);
3372 }
3373
3374 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
3375
3376 if (ZFS_IS_VOLUME(zhp)) {
3377 zc.zc_objset_type = DMU_OST_ZVOL;
3378 } else {
3379 zc.zc_objset_type = DMU_OST_ZFS;
3380 }
3381
3382 zc.zc_defer_destroy = defer;
3383 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_DESTROY, &zc) != 0 &&
3384 errno != ENOENT) {
3385 return (zfs_standard_error_fmt(zhp->zfs_hdl, errno,
3386 dgettext(TEXT_DOMAIN, "cannot destroy '%s'"),
3387 zhp->zfs_name));
3388 }
3389
3390 remove_mountpoint(zhp);
3391
3392 return (0);
3393 }
3394
3395 struct destroydata {
3396 nvlist_t *nvl;
3397 const char *snapname;
3398 };
3399
3400 static int
3401 zfs_check_snap_cb(zfs_handle_t *zhp, void *arg)
3402 {
3403 struct destroydata *dd = arg;
3404 char name[ZFS_MAXNAMELEN];
3405 int rv = 0;
3406
3407 (void) snprintf(name, sizeof (name),
3408 "%s@%s", zhp->zfs_name, dd->snapname);
3409
3410 if (lzc_exists(name))
3411 verify(nvlist_add_boolean(dd->nvl, name) == 0);
3412
3413 rv = zfs_iter_filesystems(zhp, zfs_check_snap_cb, dd);
3414 zfs_close(zhp);
3415 return (rv);
3416 }
3417
3418 /*
3419 * Destroys all snapshots with the given name in zhp & descendants.
3420 */
3421 int
3422 zfs_destroy_snaps(zfs_handle_t *zhp, char *snapname, boolean_t defer)
3423 {
3424 int ret;
3425 struct destroydata dd = { 0 };
3426
3427 dd.snapname = snapname;
3428 verify(nvlist_alloc(&dd.nvl, NV_UNIQUE_NAME, 0) == 0);
3429 (void) zfs_check_snap_cb(zfs_handle_dup(zhp), &dd);
3430
3431 if (nvlist_empty(dd.nvl)) {
3432 ret = zfs_standard_error_fmt(zhp->zfs_hdl, ENOENT,
3433 dgettext(TEXT_DOMAIN, "cannot destroy '%s@%s'"),
3434 zhp->zfs_name, snapname);
3435 } else {
3436 ret = zfs_destroy_snaps_nvl(zhp->zfs_hdl, dd.nvl, defer);
3437 }
3438 nvlist_free(dd.nvl);
3439 return (ret);
3440 }
3441
3442 /*
3443 * Destroys all the snapshots named in the nvlist.
3444 */
3445 int
3446 zfs_destroy_snaps_nvl(libzfs_handle_t *hdl, nvlist_t *snaps, boolean_t defer)
3447 {
3448 int ret;
3449 nvlist_t *errlist = NULL;
3450 nvpair_t *pair;
3451
3452 ret = lzc_destroy_snaps(snaps, defer, &errlist);
3453
3454 if (ret == 0) {
3455 nvlist_free(errlist);
3456 return (0);
3457 }
3458
3459 if (nvlist_empty(errlist)) {
3460 char errbuf[1024];
3461 (void) snprintf(errbuf, sizeof (errbuf),
3462 dgettext(TEXT_DOMAIN, "cannot destroy snapshots"));
3463
3464 ret = zfs_standard_error(hdl, ret, errbuf);
3465 }
3466 for (pair = nvlist_next_nvpair(errlist, NULL);
3467 pair != NULL; pair = nvlist_next_nvpair(errlist, pair)) {
3468 char errbuf[1024];
3469 (void) snprintf(errbuf, sizeof (errbuf),
3470 dgettext(TEXT_DOMAIN, "cannot destroy snapshot %s"),
3471 nvpair_name(pair));
3472
3473 switch (fnvpair_value_int32(pair)) {
3474 case EEXIST:
3475 zfs_error_aux(hdl,
3476 dgettext(TEXT_DOMAIN, "snapshot is cloned"));
3477 ret = zfs_error(hdl, EZFS_EXISTS, errbuf);
3478 break;
3479 default:
3480 ret = zfs_standard_error(hdl, errno, errbuf);
3481 break;
3482 }
3483 }
3484
3485 nvlist_free(errlist);
3486 return (ret);
3487 }
3488
3489 /*
3490 * Clones the given dataset. The target must be of the same type as the source.
3491 */
3492 int
3493 zfs_clone(zfs_handle_t *zhp, const char *target, nvlist_t *props)
3494 {
3495 char parent[ZFS_MAXNAMELEN];
3496 int ret;
3497 char errbuf[1024];
3498 libzfs_handle_t *hdl = zhp->zfs_hdl;
3499 uint64_t zoned;
3500
3501 assert(zhp->zfs_type == ZFS_TYPE_SNAPSHOT);
3502
3503 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3504 "cannot create '%s'"), target);
3505
3506 /* validate the target/clone name */
3507 if (!zfs_validate_name(hdl, target, ZFS_TYPE_FILESYSTEM, B_TRUE))
3508 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3509
3510 /* validate parents exist */
3511 if (check_parents(hdl, target, &zoned, B_FALSE, NULL) != 0)
3512 return (-1);
3513
3514 (void) parent_name(target, parent, sizeof (parent));
3515
3516 /* do the clone */
3517
3518 if (props) {
3519 zfs_type_t type;
3520 if (ZFS_IS_VOLUME(zhp)) {
3521 type = ZFS_TYPE_VOLUME;
3522 } else {
3523 type = ZFS_TYPE_FILESYSTEM;
3524 }
3525 if ((props = zfs_valid_proplist(hdl, type, props, zoned,
3526 zhp, zhp->zpool_hdl, errbuf)) == NULL)
3527 return (-1);
3528 }
3529
3530 ret = lzc_clone(target, zhp->zfs_name, props);
3531 nvlist_free(props);
3532
3533 if (ret != 0) {
3534 switch (errno) {
3535
3536 case ENOENT:
3537 /*
3538 * The parent doesn't exist. We should have caught this
3539 * above, but there may a race condition that has since
3540 * destroyed the parent.
3541 *
3542 * At this point, we don't know whether it's the source
3543 * that doesn't exist anymore, or whether the target
3544 * dataset doesn't exist.
3545 */
3546 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
3547 "no such parent '%s'"), parent);
3548 return (zfs_error(zhp->zfs_hdl, EZFS_NOENT, errbuf));
3549
3550 case EXDEV:
3551 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
3552 "source and target pools differ"));
3553 return (zfs_error(zhp->zfs_hdl, EZFS_CROSSTARGET,
3554 errbuf));
3555
3556 default:
3557 return (zfs_standard_error(zhp->zfs_hdl, errno,
3558 errbuf));
3559 }
3560 }
3561
3562 return (ret);
3563 }
3564
3565 /*
3566 * Promotes the given clone fs to be the clone parent.
3567 */
3568 int
3569 zfs_promote(zfs_handle_t *zhp)
3570 {
3571 libzfs_handle_t *hdl = zhp->zfs_hdl;
3572 zfs_cmd_t zc = {"\0"};
3573 char parent[MAXPATHLEN];
3574 int ret;
3575 char errbuf[1024];
3576
3577 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3578 "cannot promote '%s'"), zhp->zfs_name);
3579
3580 if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) {
3581 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3582 "snapshots can not be promoted"));
3583 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
3584 }
3585
3586 (void) strlcpy(parent, zhp->zfs_dmustats.dds_origin, sizeof (parent));
3587 if (parent[0] == '\0') {
3588 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3589 "not a cloned filesystem"));
3590 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
3591 }
3592
3593 (void) strlcpy(zc.zc_value, zhp->zfs_dmustats.dds_origin,
3594 sizeof (zc.zc_value));
3595 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
3596 ret = zfs_ioctl(hdl, ZFS_IOC_PROMOTE, &zc);
3597
3598 if (ret != 0) {
3599 int save_errno = errno;
3600
3601 switch (save_errno) {
3602 case EEXIST:
3603 /* There is a conflicting snapshot name. */
3604 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3605 "conflicting snapshot '%s' from parent '%s'"),
3606 zc.zc_string, parent);
3607 return (zfs_error(hdl, EZFS_EXISTS, errbuf));
3608
3609 default:
3610 return (zfs_standard_error(hdl, save_errno, errbuf));
3611 }
3612 }
3613 return (ret);
3614 }
3615
3616 typedef struct snapdata {
3617 nvlist_t *sd_nvl;
3618 const char *sd_snapname;
3619 } snapdata_t;
3620
3621 static int
3622 zfs_snapshot_cb(zfs_handle_t *zhp, void *arg)
3623 {
3624 snapdata_t *sd = arg;
3625 char name[ZFS_MAXNAMELEN];
3626 int rv = 0;
3627
3628 if (zfs_prop_get_int(zhp, ZFS_PROP_INCONSISTENT) == 0) {
3629 (void) snprintf(name, sizeof (name),
3630 "%s@%s", zfs_get_name(zhp), sd->sd_snapname);
3631
3632 fnvlist_add_boolean(sd->sd_nvl, name);
3633
3634 rv = zfs_iter_filesystems(zhp, zfs_snapshot_cb, sd);
3635 }
3636 zfs_close(zhp);
3637
3638 return (rv);
3639 }
3640
3641 /*
3642 * Creates snapshots. The keys in the snaps nvlist are the snapshots to be
3643 * created.
3644 */
3645 int
3646 zfs_snapshot_nvl(libzfs_handle_t *hdl, nvlist_t *snaps, nvlist_t *props)
3647 {
3648 int ret;
3649 char errbuf[1024];
3650 nvpair_t *elem;
3651 nvlist_t *errors;
3652
3653 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3654 "cannot create snapshots "));
3655
3656 elem = NULL;
3657 while ((elem = nvlist_next_nvpair(snaps, elem)) != NULL) {
3658 const char *snapname = nvpair_name(elem);
3659
3660 /* validate the target name */
3661 if (!zfs_validate_name(hdl, snapname, ZFS_TYPE_SNAPSHOT,
3662 B_TRUE)) {
3663 (void) snprintf(errbuf, sizeof (errbuf),
3664 dgettext(TEXT_DOMAIN,
3665 "cannot create snapshot '%s'"), snapname);
3666 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3667 }
3668 }
3669
3670 /*
3671 * get pool handle for prop validation. assumes all snaps are in the
3672 * same pool, as does lzc_snapshot (below).
3673 */
3674 char pool[MAXNAMELEN];
3675 elem = nvlist_next_nvpair(snaps, NULL);
3676 (void) strlcpy(pool, nvpair_name(elem), sizeof (pool));
3677 pool[strcspn(pool, "/@")] = '\0';
3678 zpool_handle_t *zpool_hdl = zpool_open(hdl, pool);
3679
3680 if (props != NULL &&
3681 (props = zfs_valid_proplist(hdl, ZFS_TYPE_SNAPSHOT,
3682 props, B_FALSE, NULL, zpool_hdl, errbuf)) == NULL) {
3683 zpool_close(zpool_hdl);
3684 return (-1);
3685 }
3686 zpool_close(zpool_hdl);
3687
3688 ret = lzc_snapshot(snaps, props, &errors);
3689
3690 if (ret != 0) {
3691 boolean_t printed = B_FALSE;
3692 for (elem = nvlist_next_nvpair(errors, NULL);
3693 elem != NULL;
3694 elem = nvlist_next_nvpair(errors, elem)) {
3695 (void) snprintf(errbuf, sizeof (errbuf),
3696 dgettext(TEXT_DOMAIN,
3697 "cannot create snapshot '%s'"), nvpair_name(elem));
3698 (void) zfs_standard_error(hdl,
3699 fnvpair_value_int32(elem), errbuf);
3700 printed = B_TRUE;
3701 }
3702 if (!printed) {
3703 switch (ret) {
3704 case EXDEV:
3705 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3706 "multiple snapshots of same "
3707 "fs not allowed"));
3708 (void) zfs_error(hdl, EZFS_EXISTS, errbuf);
3709
3710 break;
3711 default:
3712 (void) zfs_standard_error(hdl, ret, errbuf);
3713 }
3714 }
3715 }
3716
3717 nvlist_free(props);
3718 nvlist_free(errors);
3719 return (ret);
3720 }
3721
3722 int
3723 zfs_snapshot(libzfs_handle_t *hdl, const char *path, boolean_t recursive,
3724 nvlist_t *props)
3725 {
3726 int ret;
3727 snapdata_t sd = { 0 };
3728 char fsname[ZFS_MAXNAMELEN];
3729 char *cp;
3730 zfs_handle_t *zhp;
3731 char errbuf[1024];
3732
3733 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3734 "cannot snapshot %s"), path);
3735
3736 if (!zfs_validate_name(hdl, path, ZFS_TYPE_SNAPSHOT, B_TRUE))
3737 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3738
3739 (void) strlcpy(fsname, path, sizeof (fsname));
3740 cp = strchr(fsname, '@');
3741 *cp = '\0';
3742 sd.sd_snapname = cp + 1;
3743
3744 if ((zhp = zfs_open(hdl, fsname, ZFS_TYPE_FILESYSTEM |
3745 ZFS_TYPE_VOLUME)) == NULL) {
3746 return (-1);
3747 }
3748
3749 verify(nvlist_alloc(&sd.sd_nvl, NV_UNIQUE_NAME, 0) == 0);
3750 if (recursive) {
3751 (void) zfs_snapshot_cb(zfs_handle_dup(zhp), &sd);
3752 } else {
3753 fnvlist_add_boolean(sd.sd_nvl, path);
3754 }
3755
3756 ret = zfs_snapshot_nvl(hdl, sd.sd_nvl, props);
3757 nvlist_free(sd.sd_nvl);
3758 zfs_close(zhp);
3759 return (ret);
3760 }
3761
3762 /*
3763 * Destroy any more recent snapshots. We invoke this callback on any dependents
3764 * of the snapshot first. If the 'cb_dependent' member is non-zero, then this
3765 * is a dependent and we should just destroy it without checking the transaction
3766 * group.
3767 */
3768 typedef struct rollback_data {
3769 const char *cb_target; /* the snapshot */
3770 uint64_t cb_create; /* creation time reference */
3771 boolean_t cb_error;
3772 boolean_t cb_force;
3773 } rollback_data_t;
3774
3775 static int
3776 rollback_destroy_dependent(zfs_handle_t *zhp, void *data)
3777 {
3778 rollback_data_t *cbp = data;
3779 prop_changelist_t *clp;
3780
3781 /* We must destroy this clone; first unmount it */
3782 clp = changelist_gather(zhp, ZFS_PROP_NAME, 0,
3783 cbp->cb_force ? MS_FORCE: 0);
3784 if (clp == NULL || changelist_prefix(clp) != 0) {
3785 cbp->cb_error = B_TRUE;
3786 zfs_close(zhp);
3787 return (0);
3788 }
3789 if (zfs_destroy(zhp, B_FALSE) != 0)
3790 cbp->cb_error = B_TRUE;
3791 else
3792 changelist_remove(clp, zhp->zfs_name);
3793 (void) changelist_postfix(clp);
3794 changelist_free(clp);
3795
3796 zfs_close(zhp);
3797 return (0);
3798 }
3799
3800 static int
3801 rollback_destroy(zfs_handle_t *zhp, void *data)
3802 {
3803 rollback_data_t *cbp = data;
3804
3805 if (zfs_prop_get_int(zhp, ZFS_PROP_CREATETXG) > cbp->cb_create) {
3806 cbp->cb_error |= zfs_iter_dependents(zhp, B_FALSE,
3807 rollback_destroy_dependent, cbp);
3808
3809 cbp->cb_error |= zfs_destroy(zhp, B_FALSE);
3810 }
3811
3812 zfs_close(zhp);
3813 return (0);
3814 }
3815
3816 /*
3817 * Given a dataset, rollback to a specific snapshot, discarding any
3818 * data changes since then and making it the active dataset.
3819 *
3820 * Any snapshots and bookmarks more recent than the target are
3821 * destroyed, along with their dependents (i.e. clones).
3822 */
3823 int
3824 zfs_rollback(zfs_handle_t *zhp, zfs_handle_t *snap, boolean_t force)
3825 {
3826 rollback_data_t cb = { 0 };
3827 int err;
3828 boolean_t restore_resv = 0;
3829 uint64_t old_volsize = 0, new_volsize;
3830 zfs_prop_t resv_prop = { 0 };
3831
3832 assert(zhp->zfs_type == ZFS_TYPE_FILESYSTEM ||
3833 zhp->zfs_type == ZFS_TYPE_VOLUME);
3834
3835 /*
3836 * Destroy all recent snapshots and their dependents.
3837 */
3838 cb.cb_force = force;
3839 cb.cb_target = snap->zfs_name;
3840 cb.cb_create = zfs_prop_get_int(snap, ZFS_PROP_CREATETXG);
3841 (void) zfs_iter_snapshots(zhp, B_FALSE, rollback_destroy, &cb);
3842 (void) zfs_iter_bookmarks(zhp, rollback_destroy, &cb);
3843
3844 if (cb.cb_error)
3845 return (-1);
3846
3847 /*
3848 * Now that we have verified that the snapshot is the latest,
3849 * rollback to the given snapshot.
3850 */
3851
3852 if (zhp->zfs_type == ZFS_TYPE_VOLUME) {
3853 if (zfs_which_resv_prop(zhp, &resv_prop) < 0)
3854 return (-1);
3855 old_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE);
3856 restore_resv =
3857 (old_volsize == zfs_prop_get_int(zhp, resv_prop));
3858 }
3859
3860 /*
3861 * We rely on zfs_iter_children() to verify that there are no
3862 * newer snapshots for the given dataset. Therefore, we can
3863 * simply pass the name on to the ioctl() call. There is still
3864 * an unlikely race condition where the user has taken a
3865 * snapshot since we verified that this was the most recent.
3866 */
3867 err = lzc_rollback(zhp->zfs_name, NULL, 0);
3868 if (err != 0) {
3869 (void) zfs_standard_error_fmt(zhp->zfs_hdl, errno,
3870 dgettext(TEXT_DOMAIN, "cannot rollback '%s'"),
3871 zhp->zfs_name);
3872 return (err);
3873 }
3874
3875 /*
3876 * For volumes, if the pre-rollback volsize matched the pre-
3877 * rollback reservation and the volsize has changed then set
3878 * the reservation property to the post-rollback volsize.
3879 * Make a new handle since the rollback closed the dataset.
3880 */
3881 if ((zhp->zfs_type == ZFS_TYPE_VOLUME) &&
3882 (zhp = make_dataset_handle(zhp->zfs_hdl, zhp->zfs_name))) {
3883 if (restore_resv) {
3884 new_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE);
3885 if (old_volsize != new_volsize)
3886 err = zfs_prop_set_int(zhp, resv_prop,
3887 new_volsize);
3888 }
3889 zfs_close(zhp);
3890 }
3891 return (err);
3892 }
3893
3894 /*
3895 * Renames the given dataset.
3896 */
3897 int
3898 zfs_rename(zfs_handle_t *zhp, const char *target, boolean_t recursive,
3899 boolean_t force_unmount)
3900 {
3901 int ret;
3902 zfs_cmd_t zc = {"\0"};
3903 char *delim;
3904 prop_changelist_t *cl = NULL;
3905 zfs_handle_t *zhrp = NULL;
3906 char *parentname = NULL;
3907 char parent[ZFS_MAXNAMELEN];
3908 libzfs_handle_t *hdl = zhp->zfs_hdl;
3909 char errbuf[1024];
3910
3911 /* if we have the same exact name, just return success */
3912 if (strcmp(zhp->zfs_name, target) == 0)
3913 return (0);
3914
3915 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3916 "cannot rename to '%s'"), target);
3917
3918 /*
3919 * Make sure the target name is valid
3920 */
3921 if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) {
3922 if ((strchr(target, '@') == NULL) ||
3923 *target == '@') {
3924 /*
3925 * Snapshot target name is abbreviated,
3926 * reconstruct full dataset name
3927 */
3928 (void) strlcpy(parent, zhp->zfs_name,
3929 sizeof (parent));
3930 delim = strchr(parent, '@');
3931 if (strchr(target, '@') == NULL)
3932 *(++delim) = '\0';
3933 else
3934 *delim = '\0';
3935 (void) strlcat(parent, target, sizeof (parent));
3936 target = parent;
3937 } else {
3938 /*
3939 * Make sure we're renaming within the same dataset.
3940 */
3941 delim = strchr(target, '@');
3942 if (strncmp(zhp->zfs_name, target, delim - target)
3943 != 0 || zhp->zfs_name[delim - target] != '@') {
3944 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3945 "snapshots must be part of same "
3946 "dataset"));
3947 return (zfs_error(hdl, EZFS_CROSSTARGET,
3948 errbuf));
3949 }
3950 }
3951 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE))
3952 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3953 } else {
3954 if (recursive) {
3955 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3956 "recursive rename must be a snapshot"));
3957 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
3958 }
3959
3960 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE))
3961 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3962
3963 /* validate parents */
3964 if (check_parents(hdl, target, NULL, B_FALSE, NULL) != 0)
3965 return (-1);
3966
3967 /* make sure we're in the same pool */
3968 verify((delim = strchr(target, '/')) != NULL);
3969 if (strncmp(zhp->zfs_name, target, delim - target) != 0 ||
3970 zhp->zfs_name[delim - target] != '/') {
3971 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3972 "datasets must be within same pool"));
3973 return (zfs_error(hdl, EZFS_CROSSTARGET, errbuf));
3974 }
3975
3976 /* new name cannot be a child of the current dataset name */
3977 if (is_descendant(zhp->zfs_name, target)) {
3978 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3979 "New dataset name cannot be a descendant of "
3980 "current dataset name"));
3981 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3982 }
3983 }
3984
3985 (void) snprintf(errbuf, sizeof (errbuf),
3986 dgettext(TEXT_DOMAIN, "cannot rename '%s'"), zhp->zfs_name);
3987
3988 if (getzoneid() == GLOBAL_ZONEID &&
3989 zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) {
3990 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3991 "dataset is used in a non-global zone"));
3992 return (zfs_error(hdl, EZFS_ZONED, errbuf));
3993 }
3994
3995 if (recursive) {
3996 parentname = zfs_strdup(zhp->zfs_hdl, zhp->zfs_name);
3997 if (parentname == NULL) {
3998 ret = -1;
3999 goto error;
4000 }
4001 delim = strchr(parentname, '@');
4002 *delim = '\0';
4003 zhrp = zfs_open(zhp->zfs_hdl, parentname, ZFS_TYPE_DATASET);
4004 if (zhrp == NULL) {
4005 ret = -1;
4006 goto error;
4007 }
4008 } else if (zhp->zfs_type != ZFS_TYPE_SNAPSHOT) {
4009 if ((cl = changelist_gather(zhp, ZFS_PROP_NAME, 0,
4010 force_unmount ? MS_FORCE : 0)) == NULL)
4011 return (-1);
4012
4013 if (changelist_haszonedchild(cl)) {
4014 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4015 "child dataset with inherited mountpoint is used "
4016 "in a non-global zone"));
4017 (void) zfs_error(hdl, EZFS_ZONED, errbuf);
4018 ret = -1;
4019 goto error;
4020 }
4021
4022 if ((ret = changelist_prefix(cl)) != 0)
4023 goto error;
4024 }
4025
4026 if (ZFS_IS_VOLUME(zhp))
4027 zc.zc_objset_type = DMU_OST_ZVOL;
4028 else
4029 zc.zc_objset_type = DMU_OST_ZFS;
4030
4031 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
4032 (void) strlcpy(zc.zc_value, target, sizeof (zc.zc_value));
4033
4034 zc.zc_cookie = recursive;
4035
4036 if ((ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_RENAME, &zc)) != 0) {
4037 /*
4038 * if it was recursive, the one that actually failed will
4039 * be in zc.zc_name
4040 */
4041 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
4042 "cannot rename '%s'"), zc.zc_name);
4043
4044 if (recursive && errno == EEXIST) {
4045 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4046 "a child dataset already has a snapshot "
4047 "with the new name"));
4048 (void) zfs_error(hdl, EZFS_EXISTS, errbuf);
4049 } else {
4050 (void) zfs_standard_error(zhp->zfs_hdl, errno, errbuf);
4051 }
4052
4053 /*
4054 * On failure, we still want to remount any filesystems that
4055 * were previously mounted, so we don't alter the system state.
4056 */
4057 if (cl != NULL)
4058 (void) changelist_postfix(cl);
4059 } else {
4060 if (cl != NULL) {
4061 changelist_rename(cl, zfs_get_name(zhp), target);
4062 ret = changelist_postfix(cl);
4063 }
4064 }
4065
4066 error:
4067 if (parentname != NULL) {
4068 free(parentname);
4069 }
4070 if (zhrp != NULL) {
4071 zfs_close(zhrp);
4072 }
4073 if (cl != NULL) {
4074 changelist_free(cl);
4075 }
4076 return (ret);
4077 }
4078
4079 nvlist_t *
4080 zfs_get_user_props(zfs_handle_t *zhp)
4081 {
4082 return (zhp->zfs_user_props);
4083 }
4084
4085 /*
4086 * This function is used by 'zfs list' to determine the exact set of columns to
4087 * display, and their maximum widths. This does two main things:
4088 *
4089 * - If this is a list of all properties, then expand the list to include
4090 * all native properties, and set a flag so that for each dataset we look
4091 * for new unique user properties and add them to the list.
4092 *
4093 * - For non fixed-width properties, keep track of the maximum width seen
4094 * so that we can size the column appropriately. If the user has
4095 * requested received property values, we also need to compute the width
4096 * of the RECEIVED column.
4097 */
4098 int
4099 zfs_expand_proplist(zfs_handle_t *zhp, zprop_list_t **plp, boolean_t received,
4100 boolean_t literal)
4101 {
4102 libzfs_handle_t *hdl = zhp->zfs_hdl;
4103 zprop_list_t *entry;
4104 zprop_list_t **last, **start;
4105 nvlist_t *userprops, *propval;
4106 nvpair_t *elem;
4107 char *strval;
4108 char buf[ZFS_MAXPROPLEN];
4109
4110 if (zprop_expand_list(hdl, plp, ZFS_TYPE_DATASET) != 0)
4111 return (-1);
4112
4113 userprops = zfs_get_user_props(zhp);
4114
4115 entry = *plp;
4116 if (entry->pl_all && nvlist_next_nvpair(userprops, NULL) != NULL) {
4117 /*
4118 * Go through and add any user properties as necessary. We
4119 * start by incrementing our list pointer to the first
4120 * non-native property.
4121 */
4122 start = plp;
4123 while (*start != NULL) {
4124 if ((*start)->pl_prop == ZPROP_INVAL)
4125 break;
4126 start = &(*start)->pl_next;
4127 }
4128
4129 elem = NULL;
4130 while ((elem = nvlist_next_nvpair(userprops, elem)) != NULL) {
4131 /*
4132 * See if we've already found this property in our list.
4133 */
4134 for (last = start; *last != NULL;
4135 last = &(*last)->pl_next) {
4136 if (strcmp((*last)->pl_user_prop,
4137 nvpair_name(elem)) == 0)
4138 break;
4139 }
4140
4141 if (*last == NULL) {
4142 if ((entry = zfs_alloc(hdl,
4143 sizeof (zprop_list_t))) == NULL ||
4144 ((entry->pl_user_prop = zfs_strdup(hdl,
4145 nvpair_name(elem)))) == NULL) {
4146 free(entry);
4147 return (-1);
4148 }
4149
4150 entry->pl_prop = ZPROP_INVAL;
4151 entry->pl_width = strlen(nvpair_name(elem));
4152 entry->pl_all = B_TRUE;
4153 *last = entry;
4154 }
4155 }
4156 }
4157
4158 /*
4159 * Now go through and check the width of any non-fixed columns
4160 */
4161 for (entry = *plp; entry != NULL; entry = entry->pl_next) {
4162 if (entry->pl_fixed && !literal)
4163 continue;
4164
4165 if (entry->pl_prop != ZPROP_INVAL) {
4166 if (zfs_prop_get(zhp, entry->pl_prop,
4167 buf, sizeof (buf), NULL, NULL, 0, literal) == 0) {
4168 if (strlen(buf) > entry->pl_width)
4169 entry->pl_width = strlen(buf);
4170 }
4171 if (received && zfs_prop_get_recvd(zhp,
4172 zfs_prop_to_name(entry->pl_prop),
4173 buf, sizeof (buf), literal) == 0)
4174 if (strlen(buf) > entry->pl_recvd_width)
4175 entry->pl_recvd_width = strlen(buf);
4176 } else {
4177 if (nvlist_lookup_nvlist(userprops, entry->pl_user_prop,
4178 &propval) == 0) {
4179 verify(nvlist_lookup_string(propval,
4180 ZPROP_VALUE, &strval) == 0);
4181 if (strlen(strval) > entry->pl_width)
4182 entry->pl_width = strlen(strval);
4183 }
4184 if (received && zfs_prop_get_recvd(zhp,
4185 entry->pl_user_prop,
4186 buf, sizeof (buf), literal) == 0)
4187 if (strlen(buf) > entry->pl_recvd_width)
4188 entry->pl_recvd_width = strlen(buf);
4189 }
4190 }
4191
4192 return (0);
4193 }
4194
4195 void
4196 zfs_prune_proplist(zfs_handle_t *zhp, uint8_t *props)
4197 {
4198 nvpair_t *curr;
4199 nvpair_t *next;
4200
4201 /*
4202 * Keep a reference to the props-table against which we prune the
4203 * properties.
4204 */
4205 zhp->zfs_props_table = props;
4206
4207 curr = nvlist_next_nvpair(zhp->zfs_props, NULL);
4208
4209 while (curr) {
4210 zfs_prop_t zfs_prop = zfs_name_to_prop(nvpair_name(curr));
4211 next = nvlist_next_nvpair(zhp->zfs_props, curr);
4212
4213 /*
4214 * User properties will result in ZPROP_INVAL, and since we
4215 * only know how to prune standard ZFS properties, we always
4216 * leave these in the list. This can also happen if we
4217 * encounter an unknown DSL property (when running older
4218 * software, for example).
4219 */
4220 if (zfs_prop != ZPROP_INVAL && props[zfs_prop] == B_FALSE)
4221 (void) nvlist_remove(zhp->zfs_props,
4222 nvpair_name(curr), nvpair_type(curr));
4223 curr = next;
4224 }
4225 }
4226
4227 static int
4228 zfs_smb_acl_mgmt(libzfs_handle_t *hdl, char *dataset, char *path,
4229 zfs_smb_acl_op_t cmd, char *resource1, char *resource2)
4230 {
4231 zfs_cmd_t zc = {"\0"};
4232 nvlist_t *nvlist = NULL;
4233 int error;
4234
4235 (void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name));
4236 (void) strlcpy(zc.zc_value, path, sizeof (zc.zc_value));
4237 zc.zc_cookie = (uint64_t)cmd;
4238
4239 if (cmd == ZFS_SMB_ACL_RENAME) {
4240 if (nvlist_alloc(&nvlist, NV_UNIQUE_NAME, 0) != 0) {
4241 (void) no_memory(hdl);
4242 return (0);
4243 }
4244 }
4245
4246 switch (cmd) {
4247 case ZFS_SMB_ACL_ADD:
4248 case ZFS_SMB_ACL_REMOVE:
4249 (void) strlcpy(zc.zc_string, resource1, sizeof (zc.zc_string));
4250 break;
4251 case ZFS_SMB_ACL_RENAME:
4252 if (nvlist_add_string(nvlist, ZFS_SMB_ACL_SRC,
4253 resource1) != 0) {
4254 (void) no_memory(hdl);
4255 return (-1);
4256 }
4257 if (nvlist_add_string(nvlist, ZFS_SMB_ACL_TARGET,
4258 resource2) != 0) {
4259 (void) no_memory(hdl);
4260 return (-1);
4261 }
4262 if (zcmd_write_src_nvlist(hdl, &zc, nvlist) != 0) {
4263 nvlist_free(nvlist);
4264 return (-1);
4265 }
4266 break;
4267 case ZFS_SMB_ACL_PURGE:
4268 break;
4269 default:
4270 return (-1);
4271 }
4272 error = ioctl(hdl->libzfs_fd, ZFS_IOC_SMB_ACL, &zc);
4273 nvlist_free(nvlist);
4274 return (error);
4275 }
4276
4277 int
4278 zfs_smb_acl_add(libzfs_handle_t *hdl, char *dataset,
4279 char *path, char *resource)
4280 {
4281 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_ADD,
4282 resource, NULL));
4283 }
4284
4285 int
4286 zfs_smb_acl_remove(libzfs_handle_t *hdl, char *dataset,
4287 char *path, char *resource)
4288 {
4289 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_REMOVE,
4290 resource, NULL));
4291 }
4292
4293 int
4294 zfs_smb_acl_purge(libzfs_handle_t *hdl, char *dataset, char *path)
4295 {
4296 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_PURGE,
4297 NULL, NULL));
4298 }
4299
4300 int
4301 zfs_smb_acl_rename(libzfs_handle_t *hdl, char *dataset, char *path,
4302 char *oldname, char *newname)
4303 {
4304 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_RENAME,
4305 oldname, newname));
4306 }
4307
4308 int
4309 zfs_userspace(zfs_handle_t *zhp, zfs_userquota_prop_t type,
4310 zfs_userspace_cb_t func, void *arg)
4311 {
4312 zfs_cmd_t zc = {"\0"};
4313 zfs_useracct_t buf[100];
4314 libzfs_handle_t *hdl = zhp->zfs_hdl;
4315 int ret;
4316
4317 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
4318
4319 zc.zc_objset_type = type;
4320 zc.zc_nvlist_dst = (uintptr_t)buf;
4321
4322 for (;;) {
4323 zfs_useracct_t *zua = buf;
4324
4325 zc.zc_nvlist_dst_size = sizeof (buf);
4326 if (zfs_ioctl(hdl, ZFS_IOC_USERSPACE_MANY, &zc) != 0) {
4327 char errbuf[ZFS_MAXNAMELEN + 32];
4328
4329 (void) snprintf(errbuf, sizeof (errbuf),
4330 dgettext(TEXT_DOMAIN,
4331 "cannot get used/quota for %s"), zc.zc_name);
4332 return (zfs_standard_error_fmt(hdl, errno, errbuf));
4333 }
4334 if (zc.zc_nvlist_dst_size == 0)
4335 break;
4336
4337 while (zc.zc_nvlist_dst_size > 0) {
4338 if ((ret = func(arg, zua->zu_domain, zua->zu_rid,
4339 zua->zu_space)) != 0)
4340 return (ret);
4341 zua++;
4342 zc.zc_nvlist_dst_size -= sizeof (zfs_useracct_t);
4343 }
4344 }
4345
4346 return (0);
4347 }
4348
4349 struct holdarg {
4350 nvlist_t *nvl;
4351 const char *snapname;
4352 const char *tag;
4353 boolean_t recursive;
4354 int error;
4355 };
4356
4357 static int
4358 zfs_hold_one(zfs_handle_t *zhp, void *arg)
4359 {
4360 struct holdarg *ha = arg;
4361 char name[ZFS_MAXNAMELEN];
4362 int rv = 0;
4363
4364 (void) snprintf(name, sizeof (name),
4365 "%s@%s", zhp->zfs_name, ha->snapname);
4366
4367 if (lzc_exists(name))
4368 fnvlist_add_string(ha->nvl, name, ha->tag);
4369
4370 if (ha->recursive)
4371 rv = zfs_iter_filesystems(zhp, zfs_hold_one, ha);
4372 zfs_close(zhp);
4373 return (rv);
4374 }
4375
4376 int
4377 zfs_hold(zfs_handle_t *zhp, const char *snapname, const char *tag,
4378 boolean_t recursive, int cleanup_fd)
4379 {
4380 int ret;
4381 struct holdarg ha;
4382
4383 ha.nvl = fnvlist_alloc();
4384 ha.snapname = snapname;
4385 ha.tag = tag;
4386 ha.recursive = recursive;
4387 (void) zfs_hold_one(zfs_handle_dup(zhp), &ha);
4388
4389 if (nvlist_empty(ha.nvl)) {
4390 char errbuf[1024];
4391
4392 fnvlist_free(ha.nvl);
4393 ret = ENOENT;
4394 (void) snprintf(errbuf, sizeof (errbuf),
4395 dgettext(TEXT_DOMAIN,
4396 "cannot hold snapshot '%s@%s'"),
4397 zhp->zfs_name, snapname);
4398 (void) zfs_standard_error(zhp->zfs_hdl, ret, errbuf);
4399 return (ret);
4400 }
4401
4402 ret = zfs_hold_nvl(zhp, cleanup_fd, ha.nvl);
4403 fnvlist_free(ha.nvl);
4404
4405 return (ret);
4406 }
4407
4408 int
4409 zfs_hold_nvl(zfs_handle_t *zhp, int cleanup_fd, nvlist_t *holds)
4410 {
4411 int ret;
4412 nvlist_t *errors;
4413 libzfs_handle_t *hdl = zhp->zfs_hdl;
4414 char errbuf[1024];
4415 nvpair_t *elem;
4416
4417 errors = NULL;
4418 ret = lzc_hold(holds, cleanup_fd, &errors);
4419
4420 if (ret == 0) {
4421 /* There may be errors even in the success case. */
4422 fnvlist_free(errors);
4423 return (0);
4424 }
4425
4426 if (nvlist_empty(errors)) {
4427 /* no hold-specific errors */
4428 (void) snprintf(errbuf, sizeof (errbuf),
4429 dgettext(TEXT_DOMAIN, "cannot hold"));
4430 switch (ret) {
4431 case ENOTSUP:
4432 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4433 "pool must be upgraded"));
4434 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf);
4435 break;
4436 case EINVAL:
4437 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
4438 break;
4439 default:
4440 (void) zfs_standard_error(hdl, ret, errbuf);
4441 }
4442 }
4443
4444 for (elem = nvlist_next_nvpair(errors, NULL);
4445 elem != NULL;
4446 elem = nvlist_next_nvpair(errors, elem)) {
4447 (void) snprintf(errbuf, sizeof (errbuf),
4448 dgettext(TEXT_DOMAIN,
4449 "cannot hold snapshot '%s'"), nvpair_name(elem));
4450 switch (fnvpair_value_int32(elem)) {
4451 case E2BIG:
4452 /*
4453 * Temporary tags wind up having the ds object id
4454 * prepended. So even if we passed the length check
4455 * above, it's still possible for the tag to wind
4456 * up being slightly too long.
4457 */
4458 (void) zfs_error(hdl, EZFS_TAGTOOLONG, errbuf);
4459 break;
4460 case EINVAL:
4461 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
4462 break;
4463 case EEXIST:
4464 (void) zfs_error(hdl, EZFS_REFTAG_HOLD, errbuf);
4465 break;
4466 default:
4467 (void) zfs_standard_error(hdl,
4468 fnvpair_value_int32(elem), errbuf);
4469 }
4470 }
4471
4472 fnvlist_free(errors);
4473 return (ret);
4474 }
4475
4476 static int
4477 zfs_release_one(zfs_handle_t *zhp, void *arg)
4478 {
4479 struct holdarg *ha = arg;
4480 char name[ZFS_MAXNAMELEN];
4481 int rv = 0;
4482 nvlist_t *existing_holds;
4483
4484 (void) snprintf(name, sizeof (name),
4485 "%s@%s", zhp->zfs_name, ha->snapname);
4486
4487 if (lzc_get_holds(name, &existing_holds) != 0) {
4488 ha->error = ENOENT;
4489 } else if (!nvlist_exists(existing_holds, ha->tag)) {
4490 ha->error = ESRCH;
4491 } else {
4492 nvlist_t *torelease = fnvlist_alloc();
4493 fnvlist_add_boolean(torelease, ha->tag);
4494 fnvlist_add_nvlist(ha->nvl, name, torelease);
4495 fnvlist_free(torelease);
4496 }
4497
4498 if (ha->recursive)
4499 rv = zfs_iter_filesystems(zhp, zfs_release_one, ha);
4500 zfs_close(zhp);
4501 return (rv);
4502 }
4503
4504 int
4505 zfs_release(zfs_handle_t *zhp, const char *snapname, const char *tag,
4506 boolean_t recursive)
4507 {
4508 int ret;
4509 struct holdarg ha;
4510 nvlist_t *errors = NULL;
4511 nvpair_t *elem;
4512 libzfs_handle_t *hdl = zhp->zfs_hdl;
4513 char errbuf[1024];
4514
4515 ha.nvl = fnvlist_alloc();
4516 ha.snapname = snapname;
4517 ha.tag = tag;
4518 ha.recursive = recursive;
4519 ha.error = 0;
4520 (void) zfs_release_one(zfs_handle_dup(zhp), &ha);
4521
4522 if (nvlist_empty(ha.nvl)) {
4523 fnvlist_free(ha.nvl);
4524 ret = ha.error;
4525 (void) snprintf(errbuf, sizeof (errbuf),
4526 dgettext(TEXT_DOMAIN,
4527 "cannot release hold from snapshot '%s@%s'"),
4528 zhp->zfs_name, snapname);
4529 if (ret == ESRCH) {
4530 (void) zfs_error(hdl, EZFS_REFTAG_RELE, errbuf);
4531 } else {
4532 (void) zfs_standard_error(hdl, ret, errbuf);
4533 }
4534 return (ret);
4535 }
4536
4537 ret = lzc_release(ha.nvl, &errors);
4538 fnvlist_free(ha.nvl);
4539
4540 if (ret == 0) {
4541 /* There may be errors even in the success case. */
4542 fnvlist_free(errors);
4543 return (0);
4544 }
4545
4546 if (nvlist_empty(errors)) {
4547 /* no hold-specific errors */
4548 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
4549 "cannot release"));
4550 switch (errno) {
4551 case ENOTSUP:
4552 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4553 "pool must be upgraded"));
4554 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf);
4555 break;
4556 default:
4557 (void) zfs_standard_error_fmt(hdl, errno, errbuf);
4558 }
4559 }
4560
4561 for (elem = nvlist_next_nvpair(errors, NULL);
4562 elem != NULL;
4563 elem = nvlist_next_nvpair(errors, elem)) {
4564 (void) snprintf(errbuf, sizeof (errbuf),
4565 dgettext(TEXT_DOMAIN,
4566 "cannot release hold from snapshot '%s'"),
4567 nvpair_name(elem));
4568 switch (fnvpair_value_int32(elem)) {
4569 case ESRCH:
4570 (void) zfs_error(hdl, EZFS_REFTAG_RELE, errbuf);
4571 break;
4572 case EINVAL:
4573 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
4574 break;
4575 default:
4576 (void) zfs_standard_error_fmt(hdl,
4577 fnvpair_value_int32(elem), errbuf);
4578 }
4579 }
4580
4581 fnvlist_free(errors);
4582 return (ret);
4583 }
4584
4585 int
4586 zfs_get_fsacl(zfs_handle_t *zhp, nvlist_t **nvl)
4587 {
4588 zfs_cmd_t zc = {"\0"};
4589 libzfs_handle_t *hdl = zhp->zfs_hdl;
4590 int nvsz = 2048;
4591 void *nvbuf;
4592 int err = 0;
4593 char errbuf[1024];
4594
4595 assert(zhp->zfs_type == ZFS_TYPE_VOLUME ||
4596 zhp->zfs_type == ZFS_TYPE_FILESYSTEM);
4597
4598 tryagain:
4599
4600 nvbuf = malloc(nvsz);
4601 if (nvbuf == NULL) {
4602 err = (zfs_error(hdl, EZFS_NOMEM, strerror(errno)));
4603 goto out;
4604 }
4605
4606 zc.zc_nvlist_dst_size = nvsz;
4607 zc.zc_nvlist_dst = (uintptr_t)nvbuf;
4608
4609 (void) strlcpy(zc.zc_name, zhp->zfs_name, ZFS_MAXNAMELEN);
4610
4611 if (ioctl(hdl->libzfs_fd, ZFS_IOC_GET_FSACL, &zc) != 0) {
4612 (void) snprintf(errbuf, sizeof (errbuf),
4613 dgettext(TEXT_DOMAIN, "cannot get permissions on '%s'"),
4614 zc.zc_name);
4615 switch (errno) {
4616 case ENOMEM:
4617 free(nvbuf);
4618 nvsz = zc.zc_nvlist_dst_size;
4619 goto tryagain;
4620
4621 case ENOTSUP:
4622 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4623 "pool must be upgraded"));
4624 err = zfs_error(hdl, EZFS_BADVERSION, errbuf);
4625 break;
4626 case EINVAL:
4627 err = zfs_error(hdl, EZFS_BADTYPE, errbuf);
4628 break;
4629 case ENOENT:
4630 err = zfs_error(hdl, EZFS_NOENT, errbuf);
4631 break;
4632 default:
4633 err = zfs_standard_error_fmt(hdl, errno, errbuf);
4634 break;
4635 }
4636 } else {
4637 /* success */
4638 int rc = nvlist_unpack(nvbuf, zc.zc_nvlist_dst_size, nvl, 0);
4639 if (rc) {
4640 (void) snprintf(errbuf, sizeof (errbuf), dgettext(
4641 TEXT_DOMAIN, "cannot get permissions on '%s'"),
4642 zc.zc_name);
4643 err = zfs_standard_error_fmt(hdl, rc, errbuf);
4644 }
4645 }
4646
4647 free(nvbuf);
4648 out:
4649 return (err);
4650 }
4651
4652 int
4653 zfs_set_fsacl(zfs_handle_t *zhp, boolean_t un, nvlist_t *nvl)
4654 {
4655 zfs_cmd_t zc = {"\0"};
4656 libzfs_handle_t *hdl = zhp->zfs_hdl;
4657 char *nvbuf;
4658 char errbuf[1024];
4659 size_t nvsz;
4660 int err;
4661
4662 assert(zhp->zfs_type == ZFS_TYPE_VOLUME ||
4663 zhp->zfs_type == ZFS_TYPE_FILESYSTEM);
4664
4665 err = nvlist_size(nvl, &nvsz, NV_ENCODE_NATIVE);
4666 assert(err == 0);
4667
4668 nvbuf = malloc(nvsz);
4669
4670 err = nvlist_pack(nvl, &nvbuf, &nvsz, NV_ENCODE_NATIVE, 0);
4671 assert(err == 0);
4672
4673 zc.zc_nvlist_src_size = nvsz;
4674 zc.zc_nvlist_src = (uintptr_t)nvbuf;
4675 zc.zc_perm_action = un;
4676
4677 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
4678
4679 if (zfs_ioctl(hdl, ZFS_IOC_SET_FSACL, &zc) != 0) {
4680 (void) snprintf(errbuf, sizeof (errbuf),
4681 dgettext(TEXT_DOMAIN, "cannot set permissions on '%s'"),
4682 zc.zc_name);
4683 switch (errno) {
4684 case ENOTSUP:
4685 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4686 "pool must be upgraded"));
4687 err = zfs_error(hdl, EZFS_BADVERSION, errbuf);
4688 break;
4689 case EINVAL:
4690 err = zfs_error(hdl, EZFS_BADTYPE, errbuf);
4691 break;
4692 case ENOENT:
4693 err = zfs_error(hdl, EZFS_NOENT, errbuf);
4694 break;
4695 default:
4696 err = zfs_standard_error_fmt(hdl, errno, errbuf);
4697 break;
4698 }
4699 }
4700
4701 free(nvbuf);
4702
4703 return (err);
4704 }
4705
4706 int
4707 zfs_get_holds(zfs_handle_t *zhp, nvlist_t **nvl)
4708 {
4709 int err;
4710 char errbuf[1024];
4711
4712 err = lzc_get_holds(zhp->zfs_name, nvl);
4713
4714 if (err != 0) {
4715 libzfs_handle_t *hdl = zhp->zfs_hdl;
4716
4717 (void) snprintf(errbuf, sizeof (errbuf),
4718 dgettext(TEXT_DOMAIN, "cannot get holds for '%s'"),
4719 zhp->zfs_name);
4720 switch (err) {
4721 case ENOTSUP:
4722 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4723 "pool must be upgraded"));
4724 err = zfs_error(hdl, EZFS_BADVERSION, errbuf);
4725 break;
4726 case EINVAL:
4727 err = zfs_error(hdl, EZFS_BADTYPE, errbuf);
4728 break;
4729 case ENOENT:
4730 err = zfs_error(hdl, EZFS_NOENT, errbuf);
4731 break;
4732 default:
4733 err = zfs_standard_error_fmt(hdl, errno, errbuf);
4734 break;
4735 }
4736 }
4737
4738 return (err);
4739 }
4740
4741 /*
4742 * Convert the zvol's volume size to an appropriate reservation.
4743 * Note: If this routine is updated, it is necessary to update the ZFS test
4744 * suite's shell version in reservation.kshlib.
4745 */
4746 uint64_t
4747 zvol_volsize_to_reservation(uint64_t volsize, nvlist_t *props)
4748 {
4749 uint64_t numdb;
4750 uint64_t nblocks, volblocksize;
4751 int ncopies;
4752 char *strval;
4753
4754 if (nvlist_lookup_string(props,
4755 zfs_prop_to_name(ZFS_PROP_COPIES), &strval) == 0)
4756 ncopies = atoi(strval);
4757 else
4758 ncopies = 1;
4759 if (nvlist_lookup_uint64(props,
4760 zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
4761 &volblocksize) != 0)
4762 volblocksize = ZVOL_DEFAULT_BLOCKSIZE;
4763 nblocks = volsize/volblocksize;
4764 /* start with metadnode L0-L6 */
4765 numdb = 7;
4766 /* calculate number of indirects */
4767 while (nblocks > 1) {
4768 nblocks += DNODES_PER_LEVEL - 1;
4769 nblocks /= DNODES_PER_LEVEL;
4770 numdb += nblocks;
4771 }
4772 numdb *= MIN(SPA_DVAS_PER_BP, ncopies + 1);
4773 volsize *= ncopies;
4774 /*
4775 * this is exactly DN_MAX_INDBLKSHIFT when metadata isn't
4776 * compressed, but in practice they compress down to about
4777 * 1100 bytes
4778 */
4779 numdb *= 1ULL << DN_MAX_INDBLKSHIFT;
4780 volsize += numdb;
4781 return (volsize);
4782 }
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