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, 2016 by Delphix. All rights reserved.
26 * Copyright (c) 2012 DEY Storage Systems, Inc. All rights reserved.
27 * Copyright (c) 2011-2012 Pawel Jakub Dawidek. All rights reserved.
28 * Copyright (c) 2013 Martin Matuska. All rights reserved.
29 * Copyright (c) 2013 Steven Hartland. All rights reserved.
30 * Copyright (c) 2014 Integros [integros.com]
31 * Copyright 2016 Nexenta Systems, Inc.
32 * Copyright 2016 Igor Kozhukhov <ikozhukhov@gmail.com>
33 * Copyright 2017 RackTop Systems.
34 */
35
36 #include <ctype.h>
37 #include <errno.h>
38 #include <libintl.h>
39 #include <math.h>
40 #include <stdio.h>
41 #include <stdlib.h>
42 #include <strings.h>
43 #include <unistd.h>
44 #include <stddef.h>
45 #include <zone.h>
46 #include <fcntl.h>
47 #include <sys/mntent.h>
48 #include <sys/mount.h>
49 #include <priv.h>
50 #include <pwd.h>
51 #include <grp.h>
52 #include <stddef.h>
53 #include <ucred.h>
54 #include <idmap.h>
55 #include <aclutils.h>
56 #include <directory.h>
57 #include <time.h>
58
59 #include <sys/dnode.h>
60 #include <sys/spa.h>
61 #include <sys/zap.h>
62 #include <libzfs.h>
63
64 #include "zfs_namecheck.h"
65 #include "zfs_prop.h"
66 #include "libzfs_impl.h"
67 #include "zfs_deleg.h"
68
69 static int userquota_propname_decode(const char *propname, boolean_t zoned,
70 zfs_userquota_prop_t *typep, char *domain, int domainlen, uint64_t *ridp);
71
72 /*
73 * Given a single type (not a mask of types), return the type in a human
74 * readable form.
75 */
76 const char *
77 zfs_type_to_name(zfs_type_t type)
78 {
79 switch (type) {
80 case ZFS_TYPE_FILESYSTEM:
81 return (dgettext(TEXT_DOMAIN, "filesystem"));
82 case ZFS_TYPE_SNAPSHOT:
83 return (dgettext(TEXT_DOMAIN, "snapshot"));
84 case ZFS_TYPE_VOLUME:
85 return (dgettext(TEXT_DOMAIN, "volume"));
86 case ZFS_TYPE_POOL:
87 return (dgettext(TEXT_DOMAIN, "pool"));
88 case ZFS_TYPE_BOOKMARK:
89 return (dgettext(TEXT_DOMAIN, "bookmark"));
90 default:
91 assert(!"unhandled zfs_type_t");
92 }
93
94 return (NULL);
95 }
96
97 /*
98 * Validate a ZFS path. This is used even before trying to open the dataset, to
99 * provide a more meaningful error message. We call zfs_error_aux() to
100 * explain exactly why the name was not valid.
101 */
102 int
103 zfs_validate_name(libzfs_handle_t *hdl, const char *path, int type,
104 boolean_t modifying)
105 {
106 namecheck_err_t why;
107 char what;
108
109 if (entity_namecheck(path, &why, &what) != 0) {
110 if (hdl != NULL) {
111 switch (why) {
112 case NAME_ERR_TOOLONG:
113 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
114 "name is too long"));
115 break;
116
117 case NAME_ERR_LEADING_SLASH:
118 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
119 "leading slash in name"));
120 break;
121
122 case NAME_ERR_EMPTY_COMPONENT:
123 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
124 "empty component in name"));
125 break;
126
127 case NAME_ERR_TRAILING_SLASH:
128 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
129 "trailing slash in name"));
130 break;
131
132 case NAME_ERR_INVALCHAR:
133 zfs_error_aux(hdl,
134 dgettext(TEXT_DOMAIN, "invalid character "
135 "'%c' in name"), what);
136 break;
137
138 case NAME_ERR_MULTIPLE_DELIMITERS:
139 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
140 "multiple '@' and/or '#' delimiters in "
141 "name"));
142 break;
143
144 case NAME_ERR_NOLETTER:
145 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
146 "pool doesn't begin with a letter"));
147 break;
148
149 case NAME_ERR_RESERVED:
150 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
151 "name is reserved"));
152 break;
153
154 case NAME_ERR_DISKLIKE:
155 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
156 "reserved disk name"));
157 break;
158
159 default:
160 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
161 "(%d) not defined"), why);
162 break;
163 }
164 }
165
166 return (0);
167 }
168
169 if (!(type & ZFS_TYPE_SNAPSHOT) && strchr(path, '@') != NULL) {
170 if (hdl != NULL)
171 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
172 "snapshot delimiter '@' is not expected here"));
173 return (0);
174 }
175
176 if (type == ZFS_TYPE_SNAPSHOT && strchr(path, '@') == NULL) {
177 if (hdl != NULL)
178 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
179 "missing '@' delimiter in snapshot name"));
180 return (0);
181 }
182
183 if (!(type & ZFS_TYPE_BOOKMARK) && strchr(path, '#') != NULL) {
184 if (hdl != NULL)
185 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
186 "bookmark delimiter '#' is not expected here"));
187 return (0);
188 }
189
190 if (type == ZFS_TYPE_BOOKMARK && strchr(path, '#') == NULL) {
191 if (hdl != NULL)
192 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
193 "missing '#' delimiter in bookmark name"));
194 return (0);
195 }
196
197 if (modifying && strchr(path, '%') != NULL) {
198 if (hdl != NULL)
199 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
200 "invalid character %c in name"), '%');
201 return (0);
202 }
203
204 return (-1);
205 }
206
207 int
208 zfs_name_valid(const char *name, zfs_type_t type)
209 {
210 if (type == ZFS_TYPE_POOL)
211 return (zpool_name_valid(NULL, B_FALSE, name));
212 return (zfs_validate_name(NULL, name, type, B_FALSE));
213 }
214
215 /*
216 * This function takes the raw DSL properties, and filters out the user-defined
217 * properties into a separate nvlist.
218 */
219 static nvlist_t *
220 process_user_props(zfs_handle_t *zhp, nvlist_t *props)
221 {
222 libzfs_handle_t *hdl = zhp->zfs_hdl;
223 nvpair_t *elem;
224 nvlist_t *propval;
225 nvlist_t *nvl;
226
227 if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0) {
228 (void) no_memory(hdl);
229 return (NULL);
230 }
231
232 elem = NULL;
233 while ((elem = nvlist_next_nvpair(props, elem)) != NULL) {
234 if (!zfs_prop_user(nvpair_name(elem)))
235 continue;
236
237 verify(nvpair_value_nvlist(elem, &propval) == 0);
238 if (nvlist_add_nvlist(nvl, nvpair_name(elem), propval) != 0) {
239 nvlist_free(nvl);
240 (void) no_memory(hdl);
241 return (NULL);
242 }
243 }
244
245 return (nvl);
246 }
247
248 static zpool_handle_t *
249 zpool_add_handle(zfs_handle_t *zhp, const char *pool_name)
250 {
251 libzfs_handle_t *hdl = zhp->zfs_hdl;
252 zpool_handle_t *zph;
253
254 if ((zph = zpool_open_canfail(hdl, pool_name)) != NULL) {
255 if (hdl->libzfs_pool_handles != NULL)
256 zph->zpool_next = hdl->libzfs_pool_handles;
257 hdl->libzfs_pool_handles = zph;
258 }
259 return (zph);
260 }
261
262 static zpool_handle_t *
263 zpool_find_handle(zfs_handle_t *zhp, const char *pool_name, int len)
264 {
265 libzfs_handle_t *hdl = zhp->zfs_hdl;
266 zpool_handle_t *zph = hdl->libzfs_pool_handles;
267
268 while ((zph != NULL) &&
269 (strncmp(pool_name, zpool_get_name(zph), len) != 0))
270 zph = zph->zpool_next;
271 return (zph);
272 }
273
274 /*
275 * Returns a handle to the pool that contains the provided dataset.
276 * If a handle to that pool already exists then that handle is returned.
277 * Otherwise, a new handle is created and added to the list of handles.
278 */
279 static zpool_handle_t *
280 zpool_handle(zfs_handle_t *zhp)
281 {
282 char *pool_name;
283 int len;
284 zpool_handle_t *zph;
285
286 len = strcspn(zhp->zfs_name, "/@#") + 1;
287 pool_name = zfs_alloc(zhp->zfs_hdl, len);
288 (void) strlcpy(pool_name, zhp->zfs_name, len);
289
290 zph = zpool_find_handle(zhp, pool_name, len);
291 if (zph == NULL)
292 zph = zpool_add_handle(zhp, pool_name);
293
294 free(pool_name);
295 return (zph);
296 }
297
298 void
299 zpool_free_handles(libzfs_handle_t *hdl)
300 {
301 zpool_handle_t *next, *zph = hdl->libzfs_pool_handles;
302
303 while (zph != NULL) {
304 next = zph->zpool_next;
305 zpool_close(zph);
306 zph = next;
307 }
308 hdl->libzfs_pool_handles = NULL;
309 }
310
311 /*
312 * Utility function to gather stats (objset and zpl) for the given object.
313 */
314 static int
315 get_stats_ioctl(zfs_handle_t *zhp, zfs_cmd_t *zc)
316 {
317 libzfs_handle_t *hdl = zhp->zfs_hdl;
318
319 (void) strlcpy(zc->zc_name, zhp->zfs_name, sizeof (zc->zc_name));
320
321 while (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_STATS, zc) != 0) {
322 if (errno == ENOMEM) {
323 if (zcmd_expand_dst_nvlist(hdl, zc) != 0) {
324 return (-1);
325 }
326 } else {
327 return (-1);
328 }
329 }
330 return (0);
331 }
332
333 /*
334 * Utility function to get the received properties of the given object.
335 */
336 static int
337 get_recvd_props_ioctl(zfs_handle_t *zhp)
338 {
339 libzfs_handle_t *hdl = zhp->zfs_hdl;
340 nvlist_t *recvdprops;
341 zfs_cmd_t zc = { 0 };
342 int err;
343
344 if (zcmd_alloc_dst_nvlist(hdl, &zc, 0) != 0)
345 return (-1);
346
347 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
348
349 while (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_RECVD_PROPS, &zc) != 0) {
350 if (errno == ENOMEM) {
351 if (zcmd_expand_dst_nvlist(hdl, &zc) != 0) {
352 return (-1);
353 }
354 } else {
355 zcmd_free_nvlists(&zc);
356 return (-1);
357 }
358 }
359
360 err = zcmd_read_dst_nvlist(zhp->zfs_hdl, &zc, &recvdprops);
361 zcmd_free_nvlists(&zc);
362 if (err != 0)
363 return (-1);
364
365 nvlist_free(zhp->zfs_recvd_props);
366 zhp->zfs_recvd_props = recvdprops;
367
368 return (0);
369 }
370
371 static int
372 put_stats_zhdl(zfs_handle_t *zhp, zfs_cmd_t *zc)
373 {
374 nvlist_t *allprops, *userprops;
375
376 zhp->zfs_dmustats = zc->zc_objset_stats; /* structure assignment */
377
378 if (zcmd_read_dst_nvlist(zhp->zfs_hdl, zc, &allprops) != 0) {
379 return (-1);
380 }
381
382 /*
383 * XXX Why do we store the user props separately, in addition to
384 * storing them in zfs_props?
385 */
386 if ((userprops = process_user_props(zhp, allprops)) == NULL) {
387 nvlist_free(allprops);
388 return (-1);
389 }
390
391 nvlist_free(zhp->zfs_props);
392 nvlist_free(zhp->zfs_user_props);
393
394 zhp->zfs_props = allprops;
395 zhp->zfs_user_props = userprops;
396
397 return (0);
398 }
399
400 static int
401 get_stats(zfs_handle_t *zhp)
402 {
403 int rc = 0;
404 zfs_cmd_t zc = { 0 };
405
406 if (zcmd_alloc_dst_nvlist(zhp->zfs_hdl, &zc, 0) != 0)
407 return (-1);
408 if (get_stats_ioctl(zhp, &zc) != 0)
409 rc = -1;
410 else if (put_stats_zhdl(zhp, &zc) != 0)
411 rc = -1;
412 zcmd_free_nvlists(&zc);
413 return (rc);
414 }
415
416 /*
417 * Refresh the properties currently stored in the handle.
418 */
419 void
420 zfs_refresh_properties(zfs_handle_t *zhp)
421 {
422 (void) get_stats(zhp);
423 }
424
425 /*
426 * Makes a handle from the given dataset name. Used by zfs_open() and
427 * zfs_iter_* to create child handles on the fly.
428 */
429 static int
430 make_dataset_handle_common(zfs_handle_t *zhp, zfs_cmd_t *zc)
431 {
432 if (put_stats_zhdl(zhp, zc) != 0)
433 return (-1);
434
435 /*
436 * We've managed to open the dataset and gather statistics. Determine
437 * the high-level type.
438 */
439 if (zhp->zfs_dmustats.dds_type == DMU_OST_ZVOL)
440 zhp->zfs_head_type = ZFS_TYPE_VOLUME;
441 else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZFS)
442 zhp->zfs_head_type = ZFS_TYPE_FILESYSTEM;
443 else
444 abort();
445
446 if (zhp->zfs_dmustats.dds_is_snapshot)
447 zhp->zfs_type = ZFS_TYPE_SNAPSHOT;
448 else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZVOL)
449 zhp->zfs_type = ZFS_TYPE_VOLUME;
450 else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZFS)
451 zhp->zfs_type = ZFS_TYPE_FILESYSTEM;
452 else
453 abort(); /* we should never see any other types */
454
455 if ((zhp->zpool_hdl = zpool_handle(zhp)) == NULL)
456 return (-1);
457
458 return (0);
459 }
460
461 zfs_handle_t *
462 make_dataset_handle(libzfs_handle_t *hdl, const char *path)
463 {
464 zfs_cmd_t zc = { 0 };
465
466 zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1);
467
468 if (zhp == NULL)
469 return (NULL);
470
471 zhp->zfs_hdl = hdl;
472 (void) strlcpy(zhp->zfs_name, path, sizeof (zhp->zfs_name));
473 if (zcmd_alloc_dst_nvlist(hdl, &zc, 0) != 0) {
474 free(zhp);
475 return (NULL);
476 }
477 if (get_stats_ioctl(zhp, &zc) == -1) {
478 zcmd_free_nvlists(&zc);
479 free(zhp);
480 return (NULL);
481 }
482 if (make_dataset_handle_common(zhp, &zc) == -1) {
483 free(zhp);
484 zhp = NULL;
485 }
486 zcmd_free_nvlists(&zc);
487 return (zhp);
488 }
489
490 zfs_handle_t *
491 make_dataset_handle_zc(libzfs_handle_t *hdl, zfs_cmd_t *zc)
492 {
493 zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1);
494
495 if (zhp == NULL)
496 return (NULL);
497
498 zhp->zfs_hdl = hdl;
499 (void) strlcpy(zhp->zfs_name, zc->zc_name, sizeof (zhp->zfs_name));
500 if (make_dataset_handle_common(zhp, zc) == -1) {
501 free(zhp);
502 return (NULL);
503 }
504 return (zhp);
505 }
506
507 zfs_handle_t *
508 make_dataset_simple_handle_zc(zfs_handle_t *pzhp, zfs_cmd_t *zc)
509 {
510 zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1);
511
512 if (zhp == NULL)
513 return (NULL);
514
515 zhp->zfs_hdl = pzhp->zfs_hdl;
516 (void) strlcpy(zhp->zfs_name, zc->zc_name, sizeof (zhp->zfs_name));
517 zhp->zfs_head_type = pzhp->zfs_type;
518 zhp->zfs_type = ZFS_TYPE_SNAPSHOT;
519 zhp->zpool_hdl = zpool_handle(zhp);
520 return (zhp);
521 }
522
523 zfs_handle_t *
524 zfs_handle_dup(zfs_handle_t *zhp_orig)
525 {
526 zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1);
527
528 if (zhp == NULL)
529 return (NULL);
530
531 zhp->zfs_hdl = zhp_orig->zfs_hdl;
532 zhp->zpool_hdl = zhp_orig->zpool_hdl;
533 (void) strlcpy(zhp->zfs_name, zhp_orig->zfs_name,
534 sizeof (zhp->zfs_name));
535 zhp->zfs_type = zhp_orig->zfs_type;
536 zhp->zfs_head_type = zhp_orig->zfs_head_type;
537 zhp->zfs_dmustats = zhp_orig->zfs_dmustats;
538 if (zhp_orig->zfs_props != NULL) {
539 if (nvlist_dup(zhp_orig->zfs_props, &zhp->zfs_props, 0) != 0) {
540 (void) no_memory(zhp->zfs_hdl);
541 zfs_close(zhp);
542 return (NULL);
543 }
544 }
545 if (zhp_orig->zfs_user_props != NULL) {
546 if (nvlist_dup(zhp_orig->zfs_user_props,
547 &zhp->zfs_user_props, 0) != 0) {
548 (void) no_memory(zhp->zfs_hdl);
549 zfs_close(zhp);
550 return (NULL);
551 }
552 }
553 if (zhp_orig->zfs_recvd_props != NULL) {
554 if (nvlist_dup(zhp_orig->zfs_recvd_props,
555 &zhp->zfs_recvd_props, 0)) {
556 (void) no_memory(zhp->zfs_hdl);
557 zfs_close(zhp);
558 return (NULL);
559 }
560 }
561 zhp->zfs_mntcheck = zhp_orig->zfs_mntcheck;
562 if (zhp_orig->zfs_mntopts != NULL) {
563 zhp->zfs_mntopts = zfs_strdup(zhp_orig->zfs_hdl,
564 zhp_orig->zfs_mntopts);
565 }
566 zhp->zfs_props_table = zhp_orig->zfs_props_table;
567 return (zhp);
568 }
569
570 boolean_t
571 zfs_bookmark_exists(const char *path)
572 {
573 nvlist_t *bmarks;
574 nvlist_t *props;
575 char fsname[ZFS_MAX_DATASET_NAME_LEN];
576 char *bmark_name;
577 char *pound;
578 int err;
579 boolean_t rv;
580
581
582 (void) strlcpy(fsname, path, sizeof (fsname));
583 pound = strchr(fsname, '#');
584 if (pound == NULL)
585 return (B_FALSE);
586
587 *pound = '\0';
588 bmark_name = pound + 1;
589 props = fnvlist_alloc();
590 err = lzc_get_bookmarks(fsname, props, &bmarks);
591 nvlist_free(props);
592 if (err != 0) {
593 nvlist_free(bmarks);
594 return (B_FALSE);
595 }
596
597 rv = nvlist_exists(bmarks, bmark_name);
598 nvlist_free(bmarks);
599 return (rv);
600 }
601
602 zfs_handle_t *
603 make_bookmark_handle(zfs_handle_t *parent, const char *path,
604 nvlist_t *bmark_props)
605 {
606 zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1);
607
608 if (zhp == NULL)
609 return (NULL);
610
611 /* Fill in the name. */
612 zhp->zfs_hdl = parent->zfs_hdl;
613 (void) strlcpy(zhp->zfs_name, path, sizeof (zhp->zfs_name));
614
615 /* Set the property lists. */
616 if (nvlist_dup(bmark_props, &zhp->zfs_props, 0) != 0) {
617 free(zhp);
618 return (NULL);
619 }
620
621 /* Set the types. */
622 zhp->zfs_head_type = parent->zfs_head_type;
623 zhp->zfs_type = ZFS_TYPE_BOOKMARK;
624
625 if ((zhp->zpool_hdl = zpool_handle(zhp)) == NULL) {
626 nvlist_free(zhp->zfs_props);
627 free(zhp);
628 return (NULL);
629 }
630
631 return (zhp);
632 }
633
634 struct zfs_open_bookmarks_cb_data {
635 const char *path;
636 zfs_handle_t *zhp;
637 };
638
639 static int
640 zfs_open_bookmarks_cb(zfs_handle_t *zhp, void *data)
641 {
642 struct zfs_open_bookmarks_cb_data *dp = data;
643
644 /*
645 * Is it the one we are looking for?
646 */
647 if (strcmp(dp->path, zfs_get_name(zhp)) == 0) {
648 /*
649 * We found it. Save it and let the caller know we are done.
650 */
651 dp->zhp = zhp;
652 return (EEXIST);
653 }
654
655 /*
656 * Not found. Close the handle and ask for another one.
657 */
658 zfs_close(zhp);
659 return (0);
660 }
661
662 /*
663 * Opens the given snapshot, bookmark, filesystem, or volume. The 'types'
664 * argument is a mask of acceptable types. The function will print an
665 * appropriate error message and return NULL if it can't be opened.
666 */
667 zfs_handle_t *
668 zfs_open(libzfs_handle_t *hdl, const char *path, int types)
669 {
670 zfs_handle_t *zhp;
671 char errbuf[1024];
672 char *bookp;
673
674 (void) snprintf(errbuf, sizeof (errbuf),
675 dgettext(TEXT_DOMAIN, "cannot open '%s'"), path);
676
677 /*
678 * Validate the name before we even try to open it.
679 */
680 if (!zfs_validate_name(hdl, path, types, B_FALSE)) {
681 (void) zfs_error(hdl, EZFS_INVALIDNAME, errbuf);
682 return (NULL);
683 }
684
685 /*
686 * Bookmarks needs to be handled separately.
687 */
688 bookp = strchr(path, '#');
689 if (bookp == NULL) {
690 /*
691 * Try to get stats for the dataset, which will tell us if it
692 * exists.
693 */
694 errno = 0;
695 if ((zhp = make_dataset_handle(hdl, path)) == NULL) {
696 (void) zfs_standard_error(hdl, errno, errbuf);
697 return (NULL);
698 }
699 } else {
700 char dsname[ZFS_MAX_DATASET_NAME_LEN];
701 zfs_handle_t *pzhp;
702 struct zfs_open_bookmarks_cb_data cb_data = {path, NULL};
703
704 /*
705 * We need to cut out '#' and everything after '#'
706 * to get the parent dataset name only.
707 */
708 assert(bookp - path < sizeof (dsname));
709 (void) strncpy(dsname, path, bookp - path);
710 dsname[bookp - path] = '\0';
711
712 /*
713 * Create handle for the parent dataset.
714 */
715 errno = 0;
716 if ((pzhp = make_dataset_handle(hdl, dsname)) == NULL) {
717 (void) zfs_standard_error(hdl, errno, errbuf);
718 return (NULL);
719 }
720
721 /*
722 * Iterate bookmarks to find the right one.
723 */
724 errno = 0;
725 if ((zfs_iter_bookmarks(pzhp, zfs_open_bookmarks_cb,
726 &cb_data) == 0) && (cb_data.zhp == NULL)) {
727 (void) zfs_error(hdl, EZFS_NOENT, errbuf);
728 zfs_close(pzhp);
729 return (NULL);
730 }
731 if (cb_data.zhp == NULL) {
732 (void) zfs_standard_error(hdl, errno, errbuf);
733 zfs_close(pzhp);
734 return (NULL);
735 }
736 zhp = cb_data.zhp;
737
738 /*
739 * Cleanup.
740 */
741 zfs_close(pzhp);
742 }
743
744 if (!(types & zhp->zfs_type)) {
745 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
746 zfs_close(zhp);
747 return (NULL);
748 }
749
750 return (zhp);
751 }
752
753 /*
754 * Release a ZFS handle. Nothing to do but free the associated memory.
755 */
756 void
757 zfs_close(zfs_handle_t *zhp)
758 {
759 if (zhp->zfs_mntopts)
760 free(zhp->zfs_mntopts);
761 nvlist_free(zhp->zfs_props);
762 nvlist_free(zhp->zfs_user_props);
763 nvlist_free(zhp->zfs_recvd_props);
764 free(zhp);
765 }
766
767 typedef struct mnttab_node {
768 struct mnttab mtn_mt;
769 avl_node_t mtn_node;
770 } mnttab_node_t;
771
772 static int
773 libzfs_mnttab_cache_compare(const void *arg1, const void *arg2)
774 {
775 const mnttab_node_t *mtn1 = arg1;
776 const mnttab_node_t *mtn2 = arg2;
777 int rv;
778
779 rv = strcmp(mtn1->mtn_mt.mnt_special, mtn2->mtn_mt.mnt_special);
780
781 if (rv == 0)
782 return (0);
783 return (rv > 0 ? 1 : -1);
784 }
785
786 void
787 libzfs_mnttab_init(libzfs_handle_t *hdl)
788 {
789 (void) mutex_init(&hdl->libzfs_mnttab_cache_lock, MUTEX_DEFAULT, NULL);
790 assert(avl_numnodes(&hdl->libzfs_mnttab_cache) == 0);
791 avl_create(&hdl->libzfs_mnttab_cache, libzfs_mnttab_cache_compare,
792 sizeof (mnttab_node_t), offsetof(mnttab_node_t, mtn_node));
793 }
794
795 void
796 libzfs_mnttab_update(libzfs_handle_t *hdl)
797 {
798 struct mnttab entry;
799
800 rewind(hdl->libzfs_mnttab);
801 while (getmntent(hdl->libzfs_mnttab, &entry) == 0) {
802 mnttab_node_t *mtn;
803
804 if (strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0)
805 continue;
806 mtn = zfs_alloc(hdl, sizeof (mnttab_node_t));
807 mtn->mtn_mt.mnt_special = zfs_strdup(hdl, entry.mnt_special);
808 mtn->mtn_mt.mnt_mountp = zfs_strdup(hdl, entry.mnt_mountp);
809 mtn->mtn_mt.mnt_fstype = zfs_strdup(hdl, entry.mnt_fstype);
810 mtn->mtn_mt.mnt_mntopts = zfs_strdup(hdl, entry.mnt_mntopts);
811 avl_add(&hdl->libzfs_mnttab_cache, mtn);
812 }
813 }
814
815 void
816 libzfs_mnttab_fini(libzfs_handle_t *hdl)
817 {
818 void *cookie = NULL;
819 mnttab_node_t *mtn;
820
821 while ((mtn = avl_destroy_nodes(&hdl->libzfs_mnttab_cache, &cookie))
822 != NULL) {
823 free(mtn->mtn_mt.mnt_special);
824 free(mtn->mtn_mt.mnt_mountp);
825 free(mtn->mtn_mt.mnt_fstype);
826 free(mtn->mtn_mt.mnt_mntopts);
827 free(mtn);
828 }
829 avl_destroy(&hdl->libzfs_mnttab_cache);
830 (void) mutex_destroy(&hdl->libzfs_mnttab_cache_lock);
831 }
832
833 void
834 libzfs_mnttab_cache(libzfs_handle_t *hdl, boolean_t enable)
835 {
836 hdl->libzfs_mnttab_enable = enable;
837 }
838
839 int
840 libzfs_mnttab_find(libzfs_handle_t *hdl, const char *fsname,
841 struct mnttab *entry)
842 {
843 mnttab_node_t find;
844 mnttab_node_t *mtn;
845 int ret = ENOENT;
846
847 if (!hdl->libzfs_mnttab_enable) {
848 struct mnttab srch = { 0 };
849
850 if (avl_numnodes(&hdl->libzfs_mnttab_cache))
851 libzfs_mnttab_fini(hdl);
852 rewind(hdl->libzfs_mnttab);
853 srch.mnt_special = (char *)fsname;
854 srch.mnt_fstype = MNTTYPE_ZFS;
855 if (getmntany(hdl->libzfs_mnttab, entry, &srch) == 0)
856 ret = 0;
857 return (ret);
858 }
859
860 (void) mutex_lock(&hdl->libzfs_mnttab_cache_lock);
861 if (avl_numnodes(&hdl->libzfs_mnttab_cache) == 0)
862 libzfs_mnttab_update(hdl);
863
864 find.mtn_mt.mnt_special = (char *)fsname;
865 mtn = avl_find(&hdl->libzfs_mnttab_cache, &find, NULL);
866 if (mtn) {
867 *entry = mtn->mtn_mt;
868 ret = 0;
869 }
870 (void) mutex_unlock(&hdl->libzfs_mnttab_cache_lock);
871 return (ret);
872 }
873
874 void
875 libzfs_mnttab_add(libzfs_handle_t *hdl, const char *special,
876 const char *mountp, const char *mntopts)
877 {
878 mnttab_node_t *mtn;
879
880 (void) mutex_lock(&hdl->libzfs_mnttab_cache_lock);
881 if (avl_numnodes(&hdl->libzfs_mnttab_cache) != 0) {
882 mtn = zfs_alloc(hdl, sizeof (mnttab_node_t));
883 mtn->mtn_mt.mnt_special = zfs_strdup(hdl, special);
884 mtn->mtn_mt.mnt_mountp = zfs_strdup(hdl, mountp);
885 mtn->mtn_mt.mnt_fstype = zfs_strdup(hdl, MNTTYPE_ZFS);
886 mtn->mtn_mt.mnt_mntopts = zfs_strdup(hdl, mntopts);
887 avl_add(&hdl->libzfs_mnttab_cache, mtn);
888 }
889 (void) mutex_unlock(&hdl->libzfs_mnttab_cache_lock);
890 }
891
892 void
893 libzfs_mnttab_remove(libzfs_handle_t *hdl, const char *fsname)
894 {
895 mnttab_node_t find;
896 mnttab_node_t *ret;
897
898 (void) mutex_lock(&hdl->libzfs_mnttab_cache_lock);
899 find.mtn_mt.mnt_special = (char *)fsname;
900 if ((ret = avl_find(&hdl->libzfs_mnttab_cache, (void *)&find, NULL))
901 != NULL) {
902 avl_remove(&hdl->libzfs_mnttab_cache, ret);
903 free(ret->mtn_mt.mnt_special);
904 free(ret->mtn_mt.mnt_mountp);
905 free(ret->mtn_mt.mnt_fstype);
906 free(ret->mtn_mt.mnt_mntopts);
907 free(ret);
908 }
909 (void) mutex_unlock(&hdl->libzfs_mnttab_cache_lock);
910 }
911
912 int
913 zfs_spa_version(zfs_handle_t *zhp, int *spa_version)
914 {
915 zpool_handle_t *zpool_handle = zhp->zpool_hdl;
916
917 if (zpool_handle == NULL)
918 return (-1);
919
920 *spa_version = zpool_get_prop_int(zpool_handle,
921 ZPOOL_PROP_VERSION, NULL);
922 return (0);
923 }
924
925 /*
926 * The choice of reservation property depends on the SPA version.
927 */
928 static int
929 zfs_which_resv_prop(zfs_handle_t *zhp, zfs_prop_t *resv_prop)
930 {
931 int spa_version;
932
933 if (zfs_spa_version(zhp, &spa_version) < 0)
934 return (-1);
935
936 if (spa_version >= SPA_VERSION_REFRESERVATION)
937 *resv_prop = ZFS_PROP_REFRESERVATION;
938 else
939 *resv_prop = ZFS_PROP_RESERVATION;
940
941 return (0);
942 }
943
944 /*
945 * Given an nvlist of properties to set, validates that they are correct, and
946 * parses any numeric properties (index, boolean, etc) if they are specified as
947 * strings.
948 */
949 nvlist_t *
950 zfs_valid_proplist(libzfs_handle_t *hdl, zfs_type_t type, nvlist_t *nvl,
951 uint64_t zoned, zfs_handle_t *zhp, zpool_handle_t *zpool_hdl,
952 const char *errbuf)
953 {
954 nvpair_t *elem;
955 uint64_t intval;
956 char *strval;
957 zfs_prop_t prop;
958 nvlist_t *ret;
959 int chosen_normal = -1;
960 int chosen_utf = -1;
961
962 if (nvlist_alloc(&ret, NV_UNIQUE_NAME, 0) != 0) {
963 (void) no_memory(hdl);
964 return (NULL);
965 }
966
967 /*
968 * Make sure this property is valid and applies to this type.
969 */
970
971 elem = NULL;
972 while ((elem = nvlist_next_nvpair(nvl, elem)) != NULL) {
973 const char *propname = nvpair_name(elem);
974
975 prop = zfs_name_to_prop(propname);
976 if (prop == ZPROP_INVAL && zfs_prop_user(propname)) {
977 /*
978 * This is a user property: make sure it's a
979 * string, and that it's less than ZAP_MAXNAMELEN.
980 */
981 if (nvpair_type(elem) != DATA_TYPE_STRING) {
982 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
983 "'%s' must be a string"), propname);
984 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
985 goto error;
986 }
987
988 if (strlen(nvpair_name(elem)) >= ZAP_MAXNAMELEN) {
989 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
990 "property name '%s' is too long"),
991 propname);
992 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
993 goto error;
994 }
995
996 (void) nvpair_value_string(elem, &strval);
997 if (nvlist_add_string(ret, propname, strval) != 0) {
998 (void) no_memory(hdl);
999 goto error;
1000 }
1001 continue;
1002 }
1003
1004 /*
1005 * Currently, only user properties can be modified on
1006 * snapshots.
1007 */
1008 if (type == ZFS_TYPE_SNAPSHOT) {
1009 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1010 "this property can not be modified for snapshots"));
1011 (void) zfs_error(hdl, EZFS_PROPTYPE, errbuf);
1012 goto error;
1013 }
1014
1015 if (prop == ZPROP_INVAL && zfs_prop_userquota(propname)) {
1016 zfs_userquota_prop_t uqtype;
1017 char newpropname[128];
1018 char domain[128];
1019 uint64_t rid;
1020 uint64_t valary[3];
1021
1022 if (userquota_propname_decode(propname, zoned,
1023 &uqtype, domain, sizeof (domain), &rid) != 0) {
1024 zfs_error_aux(hdl,
1025 dgettext(TEXT_DOMAIN,
1026 "'%s' has an invalid user/group name"),
1027 propname);
1028 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1029 goto error;
1030 }
1031
1032 if (uqtype != ZFS_PROP_USERQUOTA &&
1033 uqtype != ZFS_PROP_GROUPQUOTA) {
1034 zfs_error_aux(hdl,
1035 dgettext(TEXT_DOMAIN, "'%s' is readonly"),
1036 propname);
1037 (void) zfs_error(hdl, EZFS_PROPREADONLY,
1038 errbuf);
1039 goto error;
1040 }
1041
1042 if (nvpair_type(elem) == DATA_TYPE_STRING) {
1043 (void) nvpair_value_string(elem, &strval);
1044 if (strcmp(strval, "none") == 0) {
1045 intval = 0;
1046 } else if (zfs_nicestrtonum(hdl,
1047 strval, &intval) != 0) {
1048 (void) zfs_error(hdl,
1049 EZFS_BADPROP, errbuf);
1050 goto error;
1051 }
1052 } else if (nvpair_type(elem) ==
1053 DATA_TYPE_UINT64) {
1054 (void) nvpair_value_uint64(elem, &intval);
1055 if (intval == 0) {
1056 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1057 "use 'none' to disable "
1058 "userquota/groupquota"));
1059 goto error;
1060 }
1061 } else {
1062 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1063 "'%s' must be a number"), propname);
1064 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1065 goto error;
1066 }
1067
1068 /*
1069 * Encode the prop name as
1070 * userquota@<hex-rid>-domain, to make it easy
1071 * for the kernel to decode.
1072 */
1073 (void) snprintf(newpropname, sizeof (newpropname),
1074 "%s%llx-%s", zfs_userquota_prop_prefixes[uqtype],
1075 (longlong_t)rid, domain);
1076 valary[0] = uqtype;
1077 valary[1] = rid;
1078 valary[2] = intval;
1079 if (nvlist_add_uint64_array(ret, newpropname,
1080 valary, 3) != 0) {
1081 (void) no_memory(hdl);
1082 goto error;
1083 }
1084 continue;
1085 } else if (prop == ZPROP_INVAL && zfs_prop_written(propname)) {
1086 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1087 "'%s' is readonly"),
1088 propname);
1089 (void) zfs_error(hdl, EZFS_PROPREADONLY, errbuf);
1090 goto error;
1091 }
1092
1093 if (prop == ZPROP_INVAL) {
1094 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1095 "invalid property '%s'"), propname);
1096 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1097 goto error;
1098 }
1099
1100 if (!zfs_prop_valid_for_type(prop, type)) {
1101 zfs_error_aux(hdl,
1102 dgettext(TEXT_DOMAIN, "'%s' does not "
1103 "apply to datasets of this type"), propname);
1104 (void) zfs_error(hdl, EZFS_PROPTYPE, errbuf);
1105 goto error;
1106 }
1107
1108 if (zfs_prop_readonly(prop) &&
1109 (!zfs_prop_setonce(prop) || zhp != NULL)) {
1110 zfs_error_aux(hdl,
1111 dgettext(TEXT_DOMAIN, "'%s' is readonly"),
1112 propname);
1113 (void) zfs_error(hdl, EZFS_PROPREADONLY, errbuf);
1114 goto error;
1115 }
1116
1117 if (zprop_parse_value(hdl, elem, prop, type, ret,
1118 &strval, &intval, errbuf) != 0)
1119 goto error;
1120
1121 /*
1122 * Perform some additional checks for specific properties.
1123 */
1124 switch (prop) {
1125 case ZFS_PROP_VERSION:
1126 {
1127 int version;
1128
1129 if (zhp == NULL)
1130 break;
1131 version = zfs_prop_get_int(zhp, ZFS_PROP_VERSION);
1132 if (intval < version) {
1133 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1134 "Can not downgrade; already at version %u"),
1135 version);
1136 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1137 goto error;
1138 }
1139 break;
1140 }
1141
1142 case ZFS_PROP_VOLBLOCKSIZE:
1143 case ZFS_PROP_RECORDSIZE:
1144 {
1145 int maxbs = SPA_MAXBLOCKSIZE;
1146 if (zpool_hdl != NULL) {
1147 maxbs = zpool_get_prop_int(zpool_hdl,
1148 ZPOOL_PROP_MAXBLOCKSIZE, NULL);
1149 }
1150 /*
1151 * Volumes are limited to a volblocksize of 128KB,
1152 * because they typically service workloads with
1153 * small random writes, which incur a large performance
1154 * penalty with large blocks.
1155 */
1156 if (prop == ZFS_PROP_VOLBLOCKSIZE)
1157 maxbs = SPA_OLD_MAXBLOCKSIZE;
1158 /*
1159 * The value must be a power of two between
1160 * SPA_MINBLOCKSIZE and maxbs.
1161 */
1162 if (intval < SPA_MINBLOCKSIZE ||
1163 intval > maxbs || !ISP2(intval)) {
1164 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1165 "'%s' must be power of 2 from 512B "
1166 "to %uKB"), propname, maxbs >> 10);
1167 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1168 goto error;
1169 }
1170 break;
1171 }
1172 case ZFS_PROP_MLSLABEL:
1173 {
1174 /*
1175 * Verify the mlslabel string and convert to
1176 * internal hex label string.
1177 */
1178
1179 m_label_t *new_sl;
1180 char *hex = NULL; /* internal label string */
1181
1182 /* Default value is already OK. */
1183 if (strcasecmp(strval, ZFS_MLSLABEL_DEFAULT) == 0)
1184 break;
1185
1186 /* Verify the label can be converted to binary form */
1187 if (((new_sl = m_label_alloc(MAC_LABEL)) == NULL) ||
1188 (str_to_label(strval, &new_sl, MAC_LABEL,
1189 L_NO_CORRECTION, NULL) == -1)) {
1190 goto badlabel;
1191 }
1192
1193 /* Now translate to hex internal label string */
1194 if (label_to_str(new_sl, &hex, M_INTERNAL,
1195 DEF_NAMES) != 0) {
1196 if (hex)
1197 free(hex);
1198 goto badlabel;
1199 }
1200 m_label_free(new_sl);
1201
1202 /* If string is already in internal form, we're done. */
1203 if (strcmp(strval, hex) == 0) {
1204 free(hex);
1205 break;
1206 }
1207
1208 /* Replace the label string with the internal form. */
1209 (void) nvlist_remove(ret, zfs_prop_to_name(prop),
1210 DATA_TYPE_STRING);
1211 verify(nvlist_add_string(ret, zfs_prop_to_name(prop),
1212 hex) == 0);
1213 free(hex);
1214
1215 break;
1216
1217 badlabel:
1218 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1219 "invalid mlslabel '%s'"), strval);
1220 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1221 m_label_free(new_sl); /* OK if null */
1222 goto error;
1223
1224 }
1225
1226 case ZFS_PROP_MOUNTPOINT:
1227 {
1228 namecheck_err_t why;
1229
1230 if (strcmp(strval, ZFS_MOUNTPOINT_NONE) == 0 ||
1231 strcmp(strval, ZFS_MOUNTPOINT_LEGACY) == 0)
1232 break;
1233
1234 if (mountpoint_namecheck(strval, &why)) {
1235 switch (why) {
1236 case NAME_ERR_LEADING_SLASH:
1237 zfs_error_aux(hdl,
1238 dgettext(TEXT_DOMAIN,
1239 "'%s' must be an absolute path, "
1240 "'none', or 'legacy'"), propname);
1241 break;
1242 case NAME_ERR_TOOLONG:
1243 zfs_error_aux(hdl,
1244 dgettext(TEXT_DOMAIN,
1245 "component of '%s' is too long"),
1246 propname);
1247 break;
1248
1249 default:
1250 zfs_error_aux(hdl,
1251 dgettext(TEXT_DOMAIN,
1252 "(%d) not defined"),
1253 why);
1254 break;
1255 }
1256 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1257 goto error;
1258 }
1259 }
1260
1261 /*FALLTHRU*/
1262
1263 case ZFS_PROP_SHARESMB:
1264 case ZFS_PROP_SHARENFS:
1265 /*
1266 * For the mountpoint and sharenfs or sharesmb
1267 * properties, check if it can be set in a
1268 * global/non-global zone based on
1269 * the zoned property value:
1270 *
1271 * global zone non-global zone
1272 * --------------------------------------------------
1273 * zoned=on mountpoint (no) mountpoint (yes)
1274 * sharenfs (no) sharenfs (no)
1275 * sharesmb (no) sharesmb (no)
1276 *
1277 * zoned=off mountpoint (yes) N/A
1278 * sharenfs (yes)
1279 * sharesmb (yes)
1280 */
1281 if (zoned) {
1282 if (getzoneid() == GLOBAL_ZONEID) {
1283 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1284 "'%s' cannot be set on "
1285 "dataset in a non-global zone"),
1286 propname);
1287 (void) zfs_error(hdl, EZFS_ZONED,
1288 errbuf);
1289 goto error;
1290 } else if (prop == ZFS_PROP_SHARENFS ||
1291 prop == ZFS_PROP_SHARESMB) {
1292 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1293 "'%s' cannot be set in "
1294 "a non-global zone"), propname);
1295 (void) zfs_error(hdl, EZFS_ZONED,
1296 errbuf);
1297 goto error;
1298 }
1299 } else if (getzoneid() != GLOBAL_ZONEID) {
1300 /*
1301 * If zoned property is 'off', this must be in
1302 * a global zone. If not, something is wrong.
1303 */
1304 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1305 "'%s' cannot be set while dataset "
1306 "'zoned' property is set"), propname);
1307 (void) zfs_error(hdl, EZFS_ZONED, errbuf);
1308 goto error;
1309 }
1310
1311 /*
1312 * At this point, it is legitimate to set the
1313 * property. Now we want to make sure that the
1314 * property value is valid if it is sharenfs.
1315 */
1316 if ((prop == ZFS_PROP_SHARENFS ||
1317 prop == ZFS_PROP_SHARESMB) &&
1318 strcmp(strval, "on") != 0 &&
1319 strcmp(strval, "off") != 0) {
1320 zfs_share_proto_t proto;
1321
1322 if (prop == ZFS_PROP_SHARESMB)
1323 proto = PROTO_SMB;
1324 else
1325 proto = PROTO_NFS;
1326
1327 /*
1328 * Must be an valid sharing protocol
1329 * option string so init the libshare
1330 * in order to enable the parser and
1331 * then parse the options. We use the
1332 * control API since we don't care about
1333 * the current configuration and don't
1334 * want the overhead of loading it
1335 * until we actually do something.
1336 */
1337
1338 if (zfs_init_libshare(hdl,
1339 SA_INIT_CONTROL_API) != SA_OK) {
1340 /*
1341 * An error occurred so we can't do
1342 * anything
1343 */
1344 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1345 "'%s' cannot be set: problem "
1346 "in share initialization"),
1347 propname);
1348 (void) zfs_error(hdl, EZFS_BADPROP,
1349 errbuf);
1350 goto error;
1351 }
1352
1353 if (zfs_parse_options(strval, proto) != SA_OK) {
1354 /*
1355 * There was an error in parsing so
1356 * deal with it by issuing an error
1357 * message and leaving after
1358 * uninitializing the the libshare
1359 * interface.
1360 */
1361 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1362 "'%s' cannot be set to invalid "
1363 "options"), propname);
1364 (void) zfs_error(hdl, EZFS_BADPROP,
1365 errbuf);
1366 zfs_uninit_libshare(hdl);
1367 goto error;
1368 }
1369 zfs_uninit_libshare(hdl);
1370 }
1371
1372 break;
1373
1374 case ZFS_PROP_UTF8ONLY:
1375 chosen_utf = (int)intval;
1376 break;
1377
1378 case ZFS_PROP_NORMALIZE:
1379 chosen_normal = (int)intval;
1380 break;
1381
1382 default:
1383 break;
1384 }
1385
1386 /*
1387 * For changes to existing volumes, we have some additional
1388 * checks to enforce.
1389 */
1390 if (type == ZFS_TYPE_VOLUME && zhp != NULL) {
1391 uint64_t volsize = zfs_prop_get_int(zhp,
1392 ZFS_PROP_VOLSIZE);
1393 uint64_t blocksize = zfs_prop_get_int(zhp,
1394 ZFS_PROP_VOLBLOCKSIZE);
1395 char buf[64];
1396
1397 switch (prop) {
1398 case ZFS_PROP_RESERVATION:
1399 case ZFS_PROP_REFRESERVATION:
1400 if (intval > volsize) {
1401 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1402 "'%s' is greater than current "
1403 "volume size"), propname);
1404 (void) zfs_error(hdl, EZFS_BADPROP,
1405 errbuf);
1406 goto error;
1407 }
1408 break;
1409
1410 case ZFS_PROP_VOLSIZE:
1411 if (intval % blocksize != 0) {
1412 zfs_nicenum(blocksize, buf,
1413 sizeof (buf));
1414 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1415 "'%s' must be a multiple of "
1416 "volume block size (%s)"),
1417 propname, buf);
1418 (void) zfs_error(hdl, EZFS_BADPROP,
1419 errbuf);
1420 goto error;
1421 }
1422
1423 if (intval == 0) {
1424 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1425 "'%s' cannot be zero"),
1426 propname);
1427 (void) zfs_error(hdl, EZFS_BADPROP,
1428 errbuf);
1429 goto error;
1430 }
1431 break;
1432
1433 default:
1434 break;
1435 }
1436 }
1437 }
1438
1439 /*
1440 * If normalization was chosen, but no UTF8 choice was made,
1441 * enforce rejection of non-UTF8 names.
1442 *
1443 * If normalization was chosen, but rejecting non-UTF8 names
1444 * was explicitly not chosen, it is an error.
1445 */
1446 if (chosen_normal > 0 && chosen_utf < 0) {
1447 if (nvlist_add_uint64(ret,
1448 zfs_prop_to_name(ZFS_PROP_UTF8ONLY), 1) != 0) {
1449 (void) no_memory(hdl);
1450 goto error;
1451 }
1452 } else if (chosen_normal > 0 && chosen_utf == 0) {
1453 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1454 "'%s' must be set 'on' if normalization chosen"),
1455 zfs_prop_to_name(ZFS_PROP_UTF8ONLY));
1456 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1457 goto error;
1458 }
1459 return (ret);
1460
1461 error:
1462 nvlist_free(ret);
1463 return (NULL);
1464 }
1465
1466 int
1467 zfs_add_synthetic_resv(zfs_handle_t *zhp, nvlist_t *nvl)
1468 {
1469 uint64_t old_volsize;
1470 uint64_t new_volsize;
1471 uint64_t old_reservation;
1472 uint64_t new_reservation;
1473 zfs_prop_t resv_prop;
1474 nvlist_t *props;
1475
1476 /*
1477 * If this is an existing volume, and someone is setting the volsize,
1478 * make sure that it matches the reservation, or add it if necessary.
1479 */
1480 old_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE);
1481 if (zfs_which_resv_prop(zhp, &resv_prop) < 0)
1482 return (-1);
1483 old_reservation = zfs_prop_get_int(zhp, resv_prop);
1484
1485 props = fnvlist_alloc();
1486 fnvlist_add_uint64(props, zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
1487 zfs_prop_get_int(zhp, ZFS_PROP_VOLBLOCKSIZE));
1488
1489 if ((zvol_volsize_to_reservation(old_volsize, props) !=
1490 old_reservation) || nvlist_exists(nvl,
1491 zfs_prop_to_name(resv_prop))) {
1492 fnvlist_free(props);
1493 return (0);
1494 }
1495 if (nvlist_lookup_uint64(nvl, zfs_prop_to_name(ZFS_PROP_VOLSIZE),
1496 &new_volsize) != 0) {
1497 fnvlist_free(props);
1498 return (-1);
1499 }
1500 new_reservation = zvol_volsize_to_reservation(new_volsize, props);
1501 fnvlist_free(props);
1502
1503 if (nvlist_add_uint64(nvl, zfs_prop_to_name(resv_prop),
1504 new_reservation) != 0) {
1505 (void) no_memory(zhp->zfs_hdl);
1506 return (-1);
1507 }
1508 return (1);
1509 }
1510
1511 void
1512 zfs_setprop_error(libzfs_handle_t *hdl, zfs_prop_t prop, int err,
1513 char *errbuf)
1514 {
1515 switch (err) {
1516
1517 case ENOSPC:
1518 /*
1519 * For quotas and reservations, ENOSPC indicates
1520 * something different; setting a quota or reservation
1521 * doesn't use any disk space.
1522 */
1523 switch (prop) {
1524 case ZFS_PROP_QUOTA:
1525 case ZFS_PROP_REFQUOTA:
1526 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1527 "size is less than current used or "
1528 "reserved space"));
1529 (void) zfs_error(hdl, EZFS_PROPSPACE, errbuf);
1530 break;
1531
1532 case ZFS_PROP_RESERVATION:
1533 case ZFS_PROP_REFRESERVATION:
1534 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1535 "size is greater than available space"));
1536 (void) zfs_error(hdl, EZFS_PROPSPACE, errbuf);
1537 break;
1538
1539 default:
1540 (void) zfs_standard_error(hdl, err, errbuf);
1541 break;
1542 }
1543 break;
1544
1545 case EBUSY:
1546 (void) zfs_standard_error(hdl, EBUSY, errbuf);
1547 break;
1548
1549 case EROFS:
1550 (void) zfs_error(hdl, EZFS_DSREADONLY, errbuf);
1551 break;
1552
1553 case E2BIG:
1554 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1555 "property value too long"));
1556 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1557 break;
1558
1559 case ENOTSUP:
1560 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1561 "pool and or dataset must be upgraded to set this "
1562 "property or value"));
1563 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf);
1564 break;
1565
1566 case ERANGE:
1567 if (prop == ZFS_PROP_COMPRESSION ||
1568 prop == ZFS_PROP_RECORDSIZE) {
1569 (void) zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1570 "property setting is not allowed on "
1571 "bootable datasets"));
1572 (void) zfs_error(hdl, EZFS_NOTSUP, errbuf);
1573 } else if (prop == ZFS_PROP_CHECKSUM ||
1574 prop == ZFS_PROP_DEDUP) {
1575 (void) zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1576 "property setting is not allowed on "
1577 "root pools"));
1578 (void) zfs_error(hdl, EZFS_NOTSUP, errbuf);
1579 } else {
1580 (void) zfs_standard_error(hdl, err, errbuf);
1581 }
1582 break;
1583
1584 case EINVAL:
1585 if (prop == ZPROP_INVAL) {
1586 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1587 } else {
1588 (void) zfs_standard_error(hdl, err, errbuf);
1589 }
1590 break;
1591
1592 case EOVERFLOW:
1593 /*
1594 * This platform can't address a volume this big.
1595 */
1596 #ifdef _ILP32
1597 if (prop == ZFS_PROP_VOLSIZE) {
1598 (void) zfs_error(hdl, EZFS_VOLTOOBIG, errbuf);
1599 break;
1600 }
1601 #endif
1602 /* FALLTHROUGH */
1603 default:
1604 (void) zfs_standard_error(hdl, err, errbuf);
1605 }
1606 }
1607
1608 /*
1609 * Given a property name and value, set the property for the given dataset.
1610 */
1611 int
1612 zfs_prop_set(zfs_handle_t *zhp, const char *propname, const char *propval)
1613 {
1614 int ret = -1;
1615 char errbuf[1024];
1616 libzfs_handle_t *hdl = zhp->zfs_hdl;
1617 nvlist_t *nvl = NULL;
1618
1619 (void) snprintf(errbuf, sizeof (errbuf),
1620 dgettext(TEXT_DOMAIN, "cannot set property for '%s'"),
1621 zhp->zfs_name);
1622
1623 if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0 ||
1624 nvlist_add_string(nvl, propname, propval) != 0) {
1625 (void) no_memory(hdl);
1626 goto error;
1627 }
1628
1629 ret = zfs_prop_set_list(zhp, nvl);
1630
1631 error:
1632 nvlist_free(nvl);
1633 return (ret);
1634 }
1635
1636
1637
1638 /*
1639 * Given an nvlist of property names and values, set the properties for the
1640 * given dataset.
1641 */
1642 int
1643 zfs_prop_set_list(zfs_handle_t *zhp, nvlist_t *props)
1644 {
1645 zfs_cmd_t zc = { 0 };
1646 int ret = -1;
1647 prop_changelist_t **cls = NULL;
1648 int cl_idx;
1649 char errbuf[1024];
1650 libzfs_handle_t *hdl = zhp->zfs_hdl;
1651 nvlist_t *nvl;
1652 int nvl_len;
1653 int added_resv = 0;
1654
1655 (void) snprintf(errbuf, sizeof (errbuf),
1656 dgettext(TEXT_DOMAIN, "cannot set property for '%s'"),
1657 zhp->zfs_name);
1658
1659 if ((nvl = zfs_valid_proplist(hdl, zhp->zfs_type, props,
1660 zfs_prop_get_int(zhp, ZFS_PROP_ZONED), zhp, zhp->zpool_hdl,
1661 errbuf)) == NULL)
1662 goto error;
1663
1664 /*
1665 * We have to check for any extra properties which need to be added
1666 * before computing the length of the nvlist.
1667 */
1668 for (nvpair_t *elem = nvlist_next_nvpair(nvl, NULL);
1669 elem != NULL;
1670 elem = nvlist_next_nvpair(nvl, elem)) {
1671 if (zfs_name_to_prop(nvpair_name(elem)) == ZFS_PROP_VOLSIZE &&
1672 (added_resv = zfs_add_synthetic_resv(zhp, nvl)) == -1) {
1673 goto error;
1674 }
1675 }
1676 /*
1677 * Check how many properties we're setting and allocate an array to
1678 * store changelist pointers for postfix().
1679 */
1680 nvl_len = 0;
1681 for (nvpair_t *elem = nvlist_next_nvpair(nvl, NULL);
1682 elem != NULL;
1683 elem = nvlist_next_nvpair(nvl, elem))
1684 nvl_len++;
1685 if ((cls = calloc(nvl_len, sizeof (prop_changelist_t *))) == NULL)
1686 goto error;
1687
1688 cl_idx = 0;
1689 for (nvpair_t *elem = nvlist_next_nvpair(nvl, NULL);
1690 elem != NULL;
1691 elem = nvlist_next_nvpair(nvl, elem)) {
1692
1693 zfs_prop_t prop = zfs_name_to_prop(nvpair_name(elem));
1694
1695 assert(cl_idx < nvl_len);
1696 /*
1697 * We don't want to unmount & remount the dataset when changing
1698 * its canmount property to 'on' or 'noauto'. We only use
1699 * the changelist logic to unmount when setting canmount=off.
1700 */
1701 if (prop != ZFS_PROP_CANMOUNT ||
1702 (fnvpair_value_uint64(elem) == ZFS_CANMOUNT_OFF &&
1703 zfs_is_mounted(zhp, NULL))) {
1704 cls[cl_idx] = changelist_gather(zhp, prop, 0, 0);
1705 if (cls[cl_idx] == NULL)
1706 goto error;
1707 }
1708
1709 if (prop == ZFS_PROP_MOUNTPOINT &&
1710 changelist_haszonedchild(cls[cl_idx])) {
1711 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1712 "child dataset with inherited mountpoint is used "
1713 "in a non-global zone"));
1714 ret = zfs_error(hdl, EZFS_ZONED, errbuf);
1715 goto error;
1716 }
1717
1718 if (cls[cl_idx] != NULL &&
1719 (ret = changelist_prefix(cls[cl_idx])) != 0)
1720 goto error;
1721
1722 cl_idx++;
1723 }
1724 assert(cl_idx == nvl_len);
1725
1726 /*
1727 * Execute the corresponding ioctl() to set this list of properties.
1728 */
1729 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
1730
1731 if ((ret = zcmd_write_src_nvlist(hdl, &zc, nvl)) != 0 ||
1732 (ret = zcmd_alloc_dst_nvlist(hdl, &zc, 0)) != 0)
1733 goto error;
1734
1735 ret = zfs_ioctl(hdl, ZFS_IOC_SET_PROP, &zc);
1736
1737 if (ret != 0) {
1738 /* Get the list of unset properties back and report them. */
1739 nvlist_t *errorprops = NULL;
1740 if (zcmd_read_dst_nvlist(hdl, &zc, &errorprops) != 0)
1741 goto error;
1742 for (nvpair_t *elem = nvlist_next_nvpair(nvl, NULL);
1743 elem != NULL;
1744 elem = nvlist_next_nvpair(nvl, elem)) {
1745 zfs_prop_t prop = zfs_name_to_prop(nvpair_name(elem));
1746 zfs_setprop_error(hdl, prop, errno, errbuf);
1747 }
1748 nvlist_free(errorprops);
1749
1750 if (added_resv && errno == ENOSPC) {
1751 /* clean up the volsize property we tried to set */
1752 uint64_t old_volsize = zfs_prop_get_int(zhp,
1753 ZFS_PROP_VOLSIZE);
1754 nvlist_free(nvl);
1755 nvl = NULL;
1756 zcmd_free_nvlists(&zc);
1757
1758 if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0)
1759 goto error;
1760 if (nvlist_add_uint64(nvl,
1761 zfs_prop_to_name(ZFS_PROP_VOLSIZE),
1762 old_volsize) != 0)
1763 goto error;
1764 if (zcmd_write_src_nvlist(hdl, &zc, nvl) != 0)
1765 goto error;
1766 (void) zfs_ioctl(hdl, ZFS_IOC_SET_PROP, &zc);
1767 }
1768 } else {
1769 for (cl_idx = 0; cl_idx < nvl_len; cl_idx++) {
1770 if (cls[cl_idx] != NULL) {
1771 int clp_err = changelist_postfix(cls[cl_idx]);
1772 if (clp_err != 0)
1773 ret = clp_err;
1774 }
1775 }
1776
1777 /*
1778 * Refresh the statistics so the new property value
1779 * is reflected.
1780 */
1781 if (ret == 0)
1782 (void) get_stats(zhp);
1783 }
1784
1785 error:
1786 nvlist_free(nvl);
1787 zcmd_free_nvlists(&zc);
1788 if (cls != NULL) {
1789 for (cl_idx = 0; cl_idx < nvl_len; cl_idx++) {
1790 if (cls[cl_idx] != NULL)
1791 changelist_free(cls[cl_idx]);
1792 }
1793 free(cls);
1794 }
1795 return (ret);
1796 }
1797
1798 /*
1799 * Given a property, inherit the value from the parent dataset, or if received
1800 * is TRUE, revert to the received value, if any.
1801 */
1802 int
1803 zfs_prop_inherit(zfs_handle_t *zhp, const char *propname, boolean_t received)
1804 {
1805 zfs_cmd_t zc = { 0 };
1806 int ret;
1807 prop_changelist_t *cl;
1808 libzfs_handle_t *hdl = zhp->zfs_hdl;
1809 char errbuf[1024];
1810 zfs_prop_t prop;
1811
1812 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
1813 "cannot inherit %s for '%s'"), propname, zhp->zfs_name);
1814
1815 zc.zc_cookie = received;
1816 if ((prop = zfs_name_to_prop(propname)) == ZPROP_INVAL) {
1817 /*
1818 * For user properties, the amount of work we have to do is very
1819 * small, so just do it here.
1820 */
1821 if (!zfs_prop_user(propname)) {
1822 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1823 "invalid property"));
1824 return (zfs_error(hdl, EZFS_BADPROP, errbuf));
1825 }
1826
1827 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
1828 (void) strlcpy(zc.zc_value, propname, sizeof (zc.zc_value));
1829
1830 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_INHERIT_PROP, &zc) != 0)
1831 return (zfs_standard_error(hdl, errno, errbuf));
1832
1833 return (0);
1834 }
1835
1836 /*
1837 * Verify that this property is inheritable.
1838 */
1839 if (zfs_prop_readonly(prop))
1840 return (zfs_error(hdl, EZFS_PROPREADONLY, errbuf));
1841
1842 if (!zfs_prop_inheritable(prop) && !received)
1843 return (zfs_error(hdl, EZFS_PROPNONINHERIT, errbuf));
1844
1845 /*
1846 * Check to see if the value applies to this type
1847 */
1848 if (!zfs_prop_valid_for_type(prop, zhp->zfs_type))
1849 return (zfs_error(hdl, EZFS_PROPTYPE, errbuf));
1850
1851 /*
1852 * Normalize the name, to get rid of shorthand abbreviations.
1853 */
1854 propname = zfs_prop_to_name(prop);
1855 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
1856 (void) strlcpy(zc.zc_value, propname, sizeof (zc.zc_value));
1857
1858 if (prop == ZFS_PROP_MOUNTPOINT && getzoneid() == GLOBAL_ZONEID &&
1859 zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) {
1860 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1861 "dataset is used in a non-global zone"));
1862 return (zfs_error(hdl, EZFS_ZONED, errbuf));
1863 }
1864
1865 /*
1866 * Determine datasets which will be affected by this change, if any.
1867 */
1868 if ((cl = changelist_gather(zhp, prop, 0, 0)) == NULL)
1869 return (-1);
1870
1871 if (prop == ZFS_PROP_MOUNTPOINT && changelist_haszonedchild(cl)) {
1872 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1873 "child dataset with inherited mountpoint is used "
1874 "in a non-global zone"));
1875 ret = zfs_error(hdl, EZFS_ZONED, errbuf);
1876 goto error;
1877 }
1878
1879 if ((ret = changelist_prefix(cl)) != 0)
1880 goto error;
1881
1882 if ((ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_INHERIT_PROP, &zc)) != 0) {
1883 return (zfs_standard_error(hdl, errno, errbuf));
1884 } else {
1885
1886 if ((ret = changelist_postfix(cl)) != 0)
1887 goto error;
1888
1889 /*
1890 * Refresh the statistics so the new property is reflected.
1891 */
1892 (void) get_stats(zhp);
1893 }
1894
1895 error:
1896 changelist_free(cl);
1897 return (ret);
1898 }
1899
1900 /*
1901 * True DSL properties are stored in an nvlist. The following two functions
1902 * extract them appropriately.
1903 */
1904 static uint64_t
1905 getprop_uint64(zfs_handle_t *zhp, zfs_prop_t prop, char **source)
1906 {
1907 nvlist_t *nv;
1908 uint64_t value;
1909
1910 *source = NULL;
1911 if (nvlist_lookup_nvlist(zhp->zfs_props,
1912 zfs_prop_to_name(prop), &nv) == 0) {
1913 verify(nvlist_lookup_uint64(nv, ZPROP_VALUE, &value) == 0);
1914 (void) nvlist_lookup_string(nv, ZPROP_SOURCE, source);
1915 } else {
1916 verify(!zhp->zfs_props_table ||
1917 zhp->zfs_props_table[prop] == B_TRUE);
1918 value = zfs_prop_default_numeric(prop);
1919 *source = "";
1920 }
1921
1922 return (value);
1923 }
1924
1925 static const char *
1926 getprop_string(zfs_handle_t *zhp, zfs_prop_t prop, char **source)
1927 {
1928 nvlist_t *nv;
1929 const char *value;
1930
1931 *source = NULL;
1932 if (nvlist_lookup_nvlist(zhp->zfs_props,
1933 zfs_prop_to_name(prop), &nv) == 0) {
1934 value = fnvlist_lookup_string(nv, ZPROP_VALUE);
1935 (void) nvlist_lookup_string(nv, ZPROP_SOURCE, source);
1936 } else {
1937 verify(!zhp->zfs_props_table ||
1938 zhp->zfs_props_table[prop] == B_TRUE);
1939 value = zfs_prop_default_string(prop);
1940 *source = "";
1941 }
1942
1943 return (value);
1944 }
1945
1946 static boolean_t
1947 zfs_is_recvd_props_mode(zfs_handle_t *zhp)
1948 {
1949 return (zhp->zfs_props == zhp->zfs_recvd_props);
1950 }
1951
1952 static void
1953 zfs_set_recvd_props_mode(zfs_handle_t *zhp, uint64_t *cookie)
1954 {
1955 *cookie = (uint64_t)(uintptr_t)zhp->zfs_props;
1956 zhp->zfs_props = zhp->zfs_recvd_props;
1957 }
1958
1959 static void
1960 zfs_unset_recvd_props_mode(zfs_handle_t *zhp, uint64_t *cookie)
1961 {
1962 zhp->zfs_props = (nvlist_t *)(uintptr_t)*cookie;
1963 *cookie = 0;
1964 }
1965
1966 /*
1967 * Internal function for getting a numeric property. Both zfs_prop_get() and
1968 * zfs_prop_get_int() are built using this interface.
1969 *
1970 * Certain properties can be overridden using 'mount -o'. In this case, scan
1971 * the contents of the /etc/mnttab entry, searching for the appropriate options.
1972 * If they differ from the on-disk values, report the current values and mark
1973 * the source "temporary".
1974 */
1975 static int
1976 get_numeric_property(zfs_handle_t *zhp, zfs_prop_t prop, zprop_source_t *src,
1977 char **source, uint64_t *val)
1978 {
1979 zfs_cmd_t zc = { 0 };
1980 nvlist_t *zplprops = NULL;
1981 struct mnttab mnt;
1982 char *mntopt_on = NULL;
1983 char *mntopt_off = NULL;
1984 boolean_t received = zfs_is_recvd_props_mode(zhp);
1985
1986 *source = NULL;
1987
1988 switch (prop) {
1989 case ZFS_PROP_ATIME:
1990 mntopt_on = MNTOPT_ATIME;
1991 mntopt_off = MNTOPT_NOATIME;
1992 break;
1993
1994 case ZFS_PROP_DEVICES:
1995 mntopt_on = MNTOPT_DEVICES;
1996 mntopt_off = MNTOPT_NODEVICES;
1997 break;
1998
1999 case ZFS_PROP_EXEC:
2000 mntopt_on = MNTOPT_EXEC;
2001 mntopt_off = MNTOPT_NOEXEC;
2002 break;
2003
2004 case ZFS_PROP_READONLY:
2005 mntopt_on = MNTOPT_RO;
2006 mntopt_off = MNTOPT_RW;
2007 break;
2008
2009 case ZFS_PROP_SETUID:
2010 mntopt_on = MNTOPT_SETUID;
2011 mntopt_off = MNTOPT_NOSETUID;
2012 break;
2013
2014 case ZFS_PROP_XATTR:
2015 mntopt_on = MNTOPT_XATTR;
2016 mntopt_off = MNTOPT_NOXATTR;
2017 break;
2018
2019 case ZFS_PROP_NBMAND:
2020 mntopt_on = MNTOPT_NBMAND;
2021 mntopt_off = MNTOPT_NONBMAND;
2022 break;
2023
2024 default:
2025 break;
2026 }
2027
2028 /*
2029 * Because looking up the mount options is potentially expensive
2030 * (iterating over all of /etc/mnttab), we defer its calculation until
2031 * we're looking up a property which requires its presence.
2032 */
2033 if (!zhp->zfs_mntcheck &&
2034 (mntopt_on != NULL || prop == ZFS_PROP_MOUNTED)) {
2035 libzfs_handle_t *hdl = zhp->zfs_hdl;
2036 struct mnttab entry;
2037
2038 if (libzfs_mnttab_find(hdl, zhp->zfs_name, &entry) == 0) {
2039 zhp->zfs_mntopts = zfs_strdup(hdl,
2040 entry.mnt_mntopts);
2041 if (zhp->zfs_mntopts == NULL)
2042 return (-1);
2043 }
2044
2045 zhp->zfs_mntcheck = B_TRUE;
2046 }
2047
2048 if (zhp->zfs_mntopts == NULL)
2049 mnt.mnt_mntopts = "";
2050 else
2051 mnt.mnt_mntopts = zhp->zfs_mntopts;
2052
2053 switch (prop) {
2054 case ZFS_PROP_ATIME:
2055 case ZFS_PROP_DEVICES:
2056 case ZFS_PROP_EXEC:
2057 case ZFS_PROP_READONLY:
2058 case ZFS_PROP_SETUID:
2059 case ZFS_PROP_XATTR:
2060 case ZFS_PROP_NBMAND:
2061 *val = getprop_uint64(zhp, prop, source);
2062
2063 if (received)
2064 break;
2065
2066 if (hasmntopt(&mnt, mntopt_on) && !*val) {
2067 *val = B_TRUE;
2068 if (src)
2069 *src = ZPROP_SRC_TEMPORARY;
2070 } else if (hasmntopt(&mnt, mntopt_off) && *val) {
2071 *val = B_FALSE;
2072 if (src)
2073 *src = ZPROP_SRC_TEMPORARY;
2074 }
2075 break;
2076
2077 case ZFS_PROP_CANMOUNT:
2078 case ZFS_PROP_VOLSIZE:
2079 case ZFS_PROP_QUOTA:
2080 case ZFS_PROP_REFQUOTA:
2081 case ZFS_PROP_RESERVATION:
2082 case ZFS_PROP_REFRESERVATION:
2083 case ZFS_PROP_FILESYSTEM_LIMIT:
2084 case ZFS_PROP_SNAPSHOT_LIMIT:
2085 case ZFS_PROP_FILESYSTEM_COUNT:
2086 case ZFS_PROP_SNAPSHOT_COUNT:
2087 *val = getprop_uint64(zhp, prop, source);
2088
2089 if (*source == NULL) {
2090 /* not default, must be local */
2091 *source = zhp->zfs_name;
2092 }
2093 break;
2094
2095 case ZFS_PROP_MOUNTED:
2096 *val = (zhp->zfs_mntopts != NULL);
2097 break;
2098
2099 case ZFS_PROP_NUMCLONES:
2100 *val = zhp->zfs_dmustats.dds_num_clones;
2101 break;
2102
2103 case ZFS_PROP_VERSION:
2104 case ZFS_PROP_NORMALIZE:
2105 case ZFS_PROP_UTF8ONLY:
2106 case ZFS_PROP_CASE:
2107 if (!zfs_prop_valid_for_type(prop, zhp->zfs_head_type) ||
2108 zcmd_alloc_dst_nvlist(zhp->zfs_hdl, &zc, 0) != 0)
2109 return (-1);
2110 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
2111 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_OBJSET_ZPLPROPS, &zc)) {
2112 zcmd_free_nvlists(&zc);
2113 return (-1);
2114 }
2115 if (zcmd_read_dst_nvlist(zhp->zfs_hdl, &zc, &zplprops) != 0 ||
2116 nvlist_lookup_uint64(zplprops, zfs_prop_to_name(prop),
2117 val) != 0) {
2118 zcmd_free_nvlists(&zc);
2119 return (-1);
2120 }
2121 nvlist_free(zplprops);
2122 zcmd_free_nvlists(&zc);
2123 break;
2124
2125 case ZFS_PROP_INCONSISTENT:
2126 *val = zhp->zfs_dmustats.dds_inconsistent;
2127 break;
2128
2129 default:
2130 switch (zfs_prop_get_type(prop)) {
2131 case PROP_TYPE_NUMBER:
2132 case PROP_TYPE_INDEX:
2133 *val = getprop_uint64(zhp, prop, source);
2134 /*
2135 * If we tried to use a default value for a
2136 * readonly property, it means that it was not
2137 * present. Note this only applies to "truly"
2138 * readonly properties, not set-once properties
2139 * like volblocksize.
2140 */
2141 if (zfs_prop_readonly(prop) &&
2142 !zfs_prop_setonce(prop) &&
2143 *source != NULL && (*source)[0] == '\0') {
2144 *source = NULL;
2145 return (-1);
2146 }
2147 break;
2148
2149 case PROP_TYPE_STRING:
2150 default:
2151 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
2152 "cannot get non-numeric property"));
2153 return (zfs_error(zhp->zfs_hdl, EZFS_BADPROP,
2154 dgettext(TEXT_DOMAIN, "internal error")));
2155 }
2156 }
2157
2158 return (0);
2159 }
2160
2161 /*
2162 * Calculate the source type, given the raw source string.
2163 */
2164 static void
2165 get_source(zfs_handle_t *zhp, zprop_source_t *srctype, char *source,
2166 char *statbuf, size_t statlen)
2167 {
2168 if (statbuf == NULL || *srctype == ZPROP_SRC_TEMPORARY)
2169 return;
2170
2171 if (source == NULL) {
2172 *srctype = ZPROP_SRC_NONE;
2173 } else if (source[0] == '\0') {
2174 *srctype = ZPROP_SRC_DEFAULT;
2175 } else if (strstr(source, ZPROP_SOURCE_VAL_RECVD) != NULL) {
2176 *srctype = ZPROP_SRC_RECEIVED;
2177 } else {
2178 if (strcmp(source, zhp->zfs_name) == 0) {
2179 *srctype = ZPROP_SRC_LOCAL;
2180 } else {
2181 (void) strlcpy(statbuf, source, statlen);
2182 *srctype = ZPROP_SRC_INHERITED;
2183 }
2184 }
2185
2186 }
2187
2188 int
2189 zfs_prop_get_recvd(zfs_handle_t *zhp, const char *propname, char *propbuf,
2190 size_t proplen, boolean_t literal)
2191 {
2192 zfs_prop_t prop;
2193 int err = 0;
2194
2195 if (zhp->zfs_recvd_props == NULL)
2196 if (get_recvd_props_ioctl(zhp) != 0)
2197 return (-1);
2198
2199 prop = zfs_name_to_prop(propname);
2200
2201 if (prop != ZPROP_INVAL) {
2202 uint64_t cookie;
2203 if (!nvlist_exists(zhp->zfs_recvd_props, propname))
2204 return (-1);
2205 zfs_set_recvd_props_mode(zhp, &cookie);
2206 err = zfs_prop_get(zhp, prop, propbuf, proplen,
2207 NULL, NULL, 0, literal);
2208 zfs_unset_recvd_props_mode(zhp, &cookie);
2209 } else {
2210 nvlist_t *propval;
2211 char *recvdval;
2212 if (nvlist_lookup_nvlist(zhp->zfs_recvd_props,
2213 propname, &propval) != 0)
2214 return (-1);
2215 verify(nvlist_lookup_string(propval, ZPROP_VALUE,
2216 &recvdval) == 0);
2217 (void) strlcpy(propbuf, recvdval, proplen);
2218 }
2219
2220 return (err == 0 ? 0 : -1);
2221 }
2222
2223 static int
2224 get_clones_string(zfs_handle_t *zhp, char *propbuf, size_t proplen)
2225 {
2226 nvlist_t *value;
2227 nvpair_t *pair;
2228
2229 value = zfs_get_clones_nvl(zhp);
2230 if (value == NULL)
2231 return (-1);
2232
2233 propbuf[0] = '\0';
2234 for (pair = nvlist_next_nvpair(value, NULL); pair != NULL;
2235 pair = nvlist_next_nvpair(value, pair)) {
2236 if (propbuf[0] != '\0')
2237 (void) strlcat(propbuf, ",", proplen);
2238 (void) strlcat(propbuf, nvpair_name(pair), proplen);
2239 }
2240
2241 return (0);
2242 }
2243
2244 struct get_clones_arg {
2245 uint64_t numclones;
2246 nvlist_t *value;
2247 const char *origin;
2248 char buf[ZFS_MAX_DATASET_NAME_LEN];
2249 };
2250
2251 int
2252 get_clones_cb(zfs_handle_t *zhp, void *arg)
2253 {
2254 struct get_clones_arg *gca = arg;
2255
2256 if (gca->numclones == 0) {
2257 zfs_close(zhp);
2258 return (0);
2259 }
2260
2261 if (zfs_prop_get(zhp, ZFS_PROP_ORIGIN, gca->buf, sizeof (gca->buf),
2262 NULL, NULL, 0, B_TRUE) != 0)
2263 goto out;
2264 if (strcmp(gca->buf, gca->origin) == 0) {
2265 fnvlist_add_boolean(gca->value, zfs_get_name(zhp));
2266 gca->numclones--;
2267 }
2268
2269 out:
2270 (void) zfs_iter_children(zhp, get_clones_cb, gca);
2271 zfs_close(zhp);
2272 return (0);
2273 }
2274
2275 nvlist_t *
2276 zfs_get_clones_nvl(zfs_handle_t *zhp)
2277 {
2278 nvlist_t *nv, *value;
2279
2280 if (nvlist_lookup_nvlist(zhp->zfs_props,
2281 zfs_prop_to_name(ZFS_PROP_CLONES), &nv) != 0) {
2282 struct get_clones_arg gca;
2283
2284 /*
2285 * if this is a snapshot, then the kernel wasn't able
2286 * to get the clones. Do it by slowly iterating.
2287 */
2288 if (zhp->zfs_type != ZFS_TYPE_SNAPSHOT)
2289 return (NULL);
2290 if (nvlist_alloc(&nv, NV_UNIQUE_NAME, 0) != 0)
2291 return (NULL);
2292 if (nvlist_alloc(&value, NV_UNIQUE_NAME, 0) != 0) {
2293 nvlist_free(nv);
2294 return (NULL);
2295 }
2296
2297 gca.numclones = zfs_prop_get_int(zhp, ZFS_PROP_NUMCLONES);
2298 gca.value = value;
2299 gca.origin = zhp->zfs_name;
2300
2301 if (gca.numclones != 0) {
2302 zfs_handle_t *root;
2303 char pool[ZFS_MAX_DATASET_NAME_LEN];
2304 char *cp = pool;
2305
2306 /* get the pool name */
2307 (void) strlcpy(pool, zhp->zfs_name, sizeof (pool));
2308 (void) strsep(&cp, "/@");
2309 root = zfs_open(zhp->zfs_hdl, pool,
2310 ZFS_TYPE_FILESYSTEM);
2311
2312 (void) get_clones_cb(root, &gca);
2313 }
2314
2315 if (gca.numclones != 0 ||
2316 nvlist_add_nvlist(nv, ZPROP_VALUE, value) != 0 ||
2317 nvlist_add_nvlist(zhp->zfs_props,
2318 zfs_prop_to_name(ZFS_PROP_CLONES), nv) != 0) {
2319 nvlist_free(nv);
2320 nvlist_free(value);
2321 return (NULL);
2322 }
2323 nvlist_free(nv);
2324 nvlist_free(value);
2325 verify(0 == nvlist_lookup_nvlist(zhp->zfs_props,
2326 zfs_prop_to_name(ZFS_PROP_CLONES), &nv));
2327 }
2328
2329 verify(nvlist_lookup_nvlist(nv, ZPROP_VALUE, &value) == 0);
2330
2331 return (value);
2332 }
2333
2334 /*
2335 * Accepts a property and value and checks that the value
2336 * matches the one found by the channel program. If they are
2337 * not equal, print both of them.
2338 */
2339 void
2340 zcp_check(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t intval,
2341 const char *strval)
2342 {
2343 if (!zhp->zfs_hdl->libzfs_prop_debug)
2344 return;
2345 int error;
2346 char *poolname = zhp->zpool_hdl->zpool_name;
2347 const char *program =
2348 "args = ...\n"
2349 "ds = args['dataset']\n"
2350 "prop = args['property']\n"
2351 "value, setpoint = zfs.get_prop(ds, prop)\n"
2352 "return {value=value, setpoint=setpoint}\n";
2353 nvlist_t *outnvl;
2354 nvlist_t *retnvl;
2355 nvlist_t *argnvl = fnvlist_alloc();
2356
2357 fnvlist_add_string(argnvl, "dataset", zhp->zfs_name);
2358 fnvlist_add_string(argnvl, "property", zfs_prop_to_name(prop));
2359
2360 error = lzc_channel_program(poolname, program,
2361 10 * 1000 * 1000, 10 * 1024 * 1024, argnvl, &outnvl);
2362
2363 if (error == 0) {
2364 retnvl = fnvlist_lookup_nvlist(outnvl, "return");
2365 if (zfs_prop_get_type(prop) == PROP_TYPE_NUMBER) {
2366 int64_t ans;
2367 error = nvlist_lookup_int64(retnvl, "value", &ans);
2368 if (error != 0) {
2369 (void) fprintf(stderr, "zcp check error: %u\n",
2370 error);
2371 return;
2372 }
2373 if (ans != intval) {
2374 (void) fprintf(stderr,
2375 "%s: zfs found %lld, but zcp found %lld\n",
2376 zfs_prop_to_name(prop),
2377 (longlong_t)intval, (longlong_t)ans);
2378 }
2379 } else {
2380 char *str_ans;
2381 error = nvlist_lookup_string(retnvl, "value", &str_ans);
2382 if (error != 0) {
2383 (void) fprintf(stderr, "zcp check error: %u\n",
2384 error);
2385 return;
2386 }
2387 if (strcmp(strval, str_ans) != 0) {
2388 (void) fprintf(stderr,
2389 "%s: zfs found %s, but zcp found %s\n",
2390 zfs_prop_to_name(prop),
2391 strval, str_ans);
2392 }
2393 }
2394 } else {
2395 (void) fprintf(stderr,
2396 "zcp check failed, channel program error: %u\n", error);
2397 }
2398 nvlist_free(argnvl);
2399 nvlist_free(outnvl);
2400 }
2401
2402 /*
2403 * Retrieve a property from the given object. If 'literal' is specified, then
2404 * numbers are left as exact values. Otherwise, numbers are converted to a
2405 * human-readable form.
2406 *
2407 * Returns 0 on success, or -1 on error.
2408 */
2409 int
2410 zfs_prop_get(zfs_handle_t *zhp, zfs_prop_t prop, char *propbuf, size_t proplen,
2411 zprop_source_t *src, char *statbuf, size_t statlen, boolean_t literal)
2412 {
2413 char *source = NULL;
2414 uint64_t val;
2415 const char *str;
2416 const char *strval;
2417 boolean_t received = zfs_is_recvd_props_mode(zhp);
2418
2419 /*
2420 * Check to see if this property applies to our object
2421 */
2422 if (!zfs_prop_valid_for_type(prop, zhp->zfs_type))
2423 return (-1);
2424
2425 if (received && zfs_prop_readonly(prop))
2426 return (-1);
2427
2428 if (src)
2429 *src = ZPROP_SRC_NONE;
2430
2431 switch (prop) {
2432 case ZFS_PROP_CREATION:
2433 /*
2434 * 'creation' is a time_t stored in the statistics. We convert
2435 * this into a string unless 'literal' is specified.
2436 */
2437 {
2438 val = getprop_uint64(zhp, prop, &source);
2439 time_t time = (time_t)val;
2440 struct tm t;
2441
2442 if (literal ||
2443 localtime_r(&time, &t) == NULL ||
2444 strftime(propbuf, proplen, "%a %b %e %k:%M %Y",
2445 &t) == 0)
2446 (void) snprintf(propbuf, proplen, "%llu", val);
2447 }
2448 zcp_check(zhp, prop, val, NULL);
2449 break;
2450
2451 case ZFS_PROP_MOUNTPOINT:
2452 /*
2453 * Getting the precise mountpoint can be tricky.
2454 *
2455 * - for 'none' or 'legacy', return those values.
2456 * - for inherited mountpoints, we want to take everything
2457 * after our ancestor and append it to the inherited value.
2458 *
2459 * If the pool has an alternate root, we want to prepend that
2460 * root to any values we return.
2461 */
2462
2463 str = getprop_string(zhp, prop, &source);
2464
2465 if (str[0] == '/') {
2466 char buf[MAXPATHLEN];
2467 char *root = buf;
2468 const char *relpath;
2469
2470 /*
2471 * If we inherit the mountpoint, even from a dataset
2472 * with a received value, the source will be the path of
2473 * the dataset we inherit from. If source is
2474 * ZPROP_SOURCE_VAL_RECVD, the received value is not
2475 * inherited.
2476 */
2477 if (strcmp(source, ZPROP_SOURCE_VAL_RECVD) == 0) {
2478 relpath = "";
2479 } else {
2480 relpath = zhp->zfs_name + strlen(source);
2481 if (relpath[0] == '/')
2482 relpath++;
2483 }
2484
2485 if ((zpool_get_prop(zhp->zpool_hdl,
2486 ZPOOL_PROP_ALTROOT, buf, MAXPATHLEN, NULL,
2487 B_FALSE)) || (strcmp(root, "-") == 0))
2488 root[0] = '\0';
2489 /*
2490 * Special case an alternate root of '/'. This will
2491 * avoid having multiple leading slashes in the
2492 * mountpoint path.
2493 */
2494 if (strcmp(root, "/") == 0)
2495 root++;
2496
2497 /*
2498 * If the mountpoint is '/' then skip over this
2499 * if we are obtaining either an alternate root or
2500 * an inherited mountpoint.
2501 */
2502 if (str[1] == '\0' && (root[0] != '\0' ||
2503 relpath[0] != '\0'))
2504 str++;
2505
2506 if (relpath[0] == '\0')
2507 (void) snprintf(propbuf, proplen, "%s%s",
2508 root, str);
2509 else
2510 (void) snprintf(propbuf, proplen, "%s%s%s%s",
2511 root, str, relpath[0] == '@' ? "" : "/",
2512 relpath);
2513 } else {
2514 /* 'legacy' or 'none' */
2515 (void) strlcpy(propbuf, str, proplen);
2516 }
2517 zcp_check(zhp, prop, NULL, propbuf);
2518 break;
2519
2520 case ZFS_PROP_ORIGIN:
2521 str = getprop_string(zhp, prop, &source);
2522 if (str == NULL)
2523 return (-1);
2524 (void) strlcpy(propbuf, str, proplen);
2525 zcp_check(zhp, prop, NULL, str);
2526 break;
2527
2528 case ZFS_PROP_CLONES:
2529 if (get_clones_string(zhp, propbuf, proplen) != 0)
2530 return (-1);
2531 break;
2532
2533 case ZFS_PROP_QUOTA:
2534 case ZFS_PROP_REFQUOTA:
2535 case ZFS_PROP_RESERVATION:
2536 case ZFS_PROP_REFRESERVATION:
2537
2538 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2539 return (-1);
2540 /*
2541 * If quota or reservation is 0, we translate this into 'none'
2542 * (unless literal is set), and indicate that it's the default
2543 * value. Otherwise, we print the number nicely and indicate
2544 * that its set locally.
2545 */
2546 if (val == 0) {
2547 if (literal)
2548 (void) strlcpy(propbuf, "0", proplen);
2549 else
2550 (void) strlcpy(propbuf, "none", proplen);
2551 } else {
2552 if (literal)
2553 (void) snprintf(propbuf, proplen, "%llu",
2554 (u_longlong_t)val);
2555 else
2556 zfs_nicenum(val, propbuf, proplen);
2557 }
2558 zcp_check(zhp, prop, val, NULL);
2559 break;
2560
2561 case ZFS_PROP_FILESYSTEM_LIMIT:
2562 case ZFS_PROP_SNAPSHOT_LIMIT:
2563 case ZFS_PROP_FILESYSTEM_COUNT:
2564 case ZFS_PROP_SNAPSHOT_COUNT:
2565
2566 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2567 return (-1);
2568
2569 /*
2570 * If limit is UINT64_MAX, we translate this into 'none' (unless
2571 * literal is set), and indicate that it's the default value.
2572 * Otherwise, we print the number nicely and indicate that it's
2573 * set locally.
2574 */
2575 if (literal) {
2576 (void) snprintf(propbuf, proplen, "%llu",
2577 (u_longlong_t)val);
2578 } else if (val == UINT64_MAX) {
2579 (void) strlcpy(propbuf, "none", proplen);
2580 } else {
2581 zfs_nicenum(val, propbuf, proplen);
2582 }
2583
2584 zcp_check(zhp, prop, val, NULL);
2585 break;
2586
2587 case ZFS_PROP_REFRATIO:
2588 case ZFS_PROP_COMPRESSRATIO:
2589 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2590 return (-1);
2591 (void) snprintf(propbuf, proplen, "%llu.%02llux",
2592 (u_longlong_t)(val / 100),
2593 (u_longlong_t)(val % 100));
2594 zcp_check(zhp, prop, val, NULL);
2595 break;
2596
2597 case ZFS_PROP_TYPE:
2598 switch (zhp->zfs_type) {
2599 case ZFS_TYPE_FILESYSTEM:
2600 str = "filesystem";
2601 break;
2602 case ZFS_TYPE_VOLUME:
2603 str = "volume";
2604 break;
2605 case ZFS_TYPE_SNAPSHOT:
2606 str = "snapshot";
2607 break;
2608 case ZFS_TYPE_BOOKMARK:
2609 str = "bookmark";
2610 break;
2611 default:
2612 abort();
2613 }
2614 (void) snprintf(propbuf, proplen, "%s", str);
2615 zcp_check(zhp, prop, NULL, propbuf);
2616 break;
2617
2618 case ZFS_PROP_MOUNTED:
2619 /*
2620 * The 'mounted' property is a pseudo-property that described
2621 * whether the filesystem is currently mounted. Even though
2622 * it's a boolean value, the typical values of "on" and "off"
2623 * don't make sense, so we translate to "yes" and "no".
2624 */
2625 if (get_numeric_property(zhp, ZFS_PROP_MOUNTED,
2626 src, &source, &val) != 0)
2627 return (-1);
2628 if (val)
2629 (void) strlcpy(propbuf, "yes", proplen);
2630 else
2631 (void) strlcpy(propbuf, "no", proplen);
2632 break;
2633
2634 case ZFS_PROP_NAME:
2635 /*
2636 * The 'name' property is a pseudo-property derived from the
2637 * dataset name. It is presented as a real property to simplify
2638 * consumers.
2639 */
2640 (void) strlcpy(propbuf, zhp->zfs_name, proplen);
2641 zcp_check(zhp, prop, NULL, propbuf);
2642 break;
2643
2644 case ZFS_PROP_MLSLABEL:
2645 {
2646 m_label_t *new_sl = NULL;
2647 char *ascii = NULL; /* human readable label */
2648
2649 (void) strlcpy(propbuf,
2650 getprop_string(zhp, prop, &source), proplen);
2651
2652 if (literal || (strcasecmp(propbuf,
2653 ZFS_MLSLABEL_DEFAULT) == 0))
2654 break;
2655
2656 /*
2657 * Try to translate the internal hex string to
2658 * human-readable output. If there are any
2659 * problems just use the hex string.
2660 */
2661
2662 if (str_to_label(propbuf, &new_sl, MAC_LABEL,
2663 L_NO_CORRECTION, NULL) == -1) {
2664 m_label_free(new_sl);
2665 break;
2666 }
2667
2668 if (label_to_str(new_sl, &ascii, M_LABEL,
2669 DEF_NAMES) != 0) {
2670 if (ascii)
2671 free(ascii);
2672 m_label_free(new_sl);
2673 break;
2674 }
2675 m_label_free(new_sl);
2676
2677 (void) strlcpy(propbuf, ascii, proplen);
2678 free(ascii);
2679 }
2680 break;
2681
2682 case ZFS_PROP_GUID:
2683 /*
2684 * GUIDs are stored as numbers, but they are identifiers.
2685 * We don't want them to be pretty printed, because pretty
2686 * printing mangles the ID into a truncated and useless value.
2687 */
2688 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2689 return (-1);
2690 (void) snprintf(propbuf, proplen, "%llu", (u_longlong_t)val);
2691 zcp_check(zhp, prop, val, NULL);
2692 break;
2693
2694 default:
2695 switch (zfs_prop_get_type(prop)) {
2696 case PROP_TYPE_NUMBER:
2697 if (get_numeric_property(zhp, prop, src,
2698 &source, &val) != 0) {
2699 return (-1);
2700 }
2701
2702 if (literal) {
2703 (void) snprintf(propbuf, proplen, "%llu",
2704 (u_longlong_t)val);
2705 } else {
2706 zfs_nicenum(val, propbuf, proplen);
2707 }
2708 zcp_check(zhp, prop, val, NULL);
2709 break;
2710
2711 case PROP_TYPE_STRING:
2712 str = getprop_string(zhp, prop, &source);
2713 if (str == NULL)
2714 return (-1);
2715
2716 (void) strlcpy(propbuf, str, proplen);
2717 zcp_check(zhp, prop, NULL, str);
2718 break;
2719
2720 case PROP_TYPE_INDEX:
2721 if (get_numeric_property(zhp, prop, src,
2722 &source, &val) != 0)
2723 return (-1);
2724 if (zfs_prop_index_to_string(prop, val, &strval) != 0)
2725 return (-1);
2726
2727 (void) strlcpy(propbuf, strval, proplen);
2728 zcp_check(zhp, prop, NULL, strval);
2729 break;
2730
2731 default:
2732 abort();
2733 }
2734 }
2735
2736 get_source(zhp, src, source, statbuf, statlen);
2737
2738 return (0);
2739 }
2740
2741 /*
2742 * Utility function to get the given numeric property. Does no validation that
2743 * the given property is the appropriate type; should only be used with
2744 * hard-coded property types.
2745 */
2746 uint64_t
2747 zfs_prop_get_int(zfs_handle_t *zhp, zfs_prop_t prop)
2748 {
2749 char *source;
2750 uint64_t val;
2751
2752 (void) get_numeric_property(zhp, prop, NULL, &source, &val);
2753
2754 return (val);
2755 }
2756
2757 int
2758 zfs_prop_set_int(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t val)
2759 {
2760 char buf[64];
2761
2762 (void) snprintf(buf, sizeof (buf), "%llu", (longlong_t)val);
2763 return (zfs_prop_set(zhp, zfs_prop_to_name(prop), buf));
2764 }
2765
2766 /*
2767 * Similar to zfs_prop_get(), but returns the value as an integer.
2768 */
2769 int
2770 zfs_prop_get_numeric(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t *value,
2771 zprop_source_t *src, char *statbuf, size_t statlen)
2772 {
2773 char *source;
2774
2775 /*
2776 * Check to see if this property applies to our object
2777 */
2778 if (!zfs_prop_valid_for_type(prop, zhp->zfs_type)) {
2779 return (zfs_error_fmt(zhp->zfs_hdl, EZFS_PROPTYPE,
2780 dgettext(TEXT_DOMAIN, "cannot get property '%s'"),
2781 zfs_prop_to_name(prop)));
2782 }
2783
2784 if (src)
2785 *src = ZPROP_SRC_NONE;
2786
2787 if (get_numeric_property(zhp, prop, src, &source, value) != 0)
2788 return (-1);
2789
2790 get_source(zhp, src, source, statbuf, statlen);
2791
2792 return (0);
2793 }
2794
2795 static int
2796 idmap_id_to_numeric_domain_rid(uid_t id, boolean_t isuser,
2797 char **domainp, idmap_rid_t *ridp)
2798 {
2799 idmap_get_handle_t *get_hdl = NULL;
2800 idmap_stat status;
2801 int err = EINVAL;
2802
2803 if (idmap_get_create(&get_hdl) != IDMAP_SUCCESS)
2804 goto out;
2805
2806 if (isuser) {
2807 err = idmap_get_sidbyuid(get_hdl, id,
2808 IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status);
2809 } else {
2810 err = idmap_get_sidbygid(get_hdl, id,
2811 IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status);
2812 }
2813 if (err == IDMAP_SUCCESS &&
2814 idmap_get_mappings(get_hdl) == IDMAP_SUCCESS &&
2815 status == IDMAP_SUCCESS)
2816 err = 0;
2817 else
2818 err = EINVAL;
2819 out:
2820 if (get_hdl)
2821 idmap_get_destroy(get_hdl);
2822 return (err);
2823 }
2824
2825 /*
2826 * convert the propname into parameters needed by kernel
2827 * Eg: userquota@ahrens -> ZFS_PROP_USERQUOTA, "", 126829
2828 * Eg: userused@matt@domain -> ZFS_PROP_USERUSED, "S-1-123-456", 789
2829 */
2830 static int
2831 userquota_propname_decode(const char *propname, boolean_t zoned,
2832 zfs_userquota_prop_t *typep, char *domain, int domainlen, uint64_t *ridp)
2833 {
2834 zfs_userquota_prop_t type;
2835 char *cp, *end;
2836 char *numericsid = NULL;
2837 boolean_t isuser;
2838
2839 domain[0] = '\0';
2840 *ridp = 0;
2841 /* Figure out the property type ({user|group}{quota|space}) */
2842 for (type = 0; type < ZFS_NUM_USERQUOTA_PROPS; type++) {
2843 if (strncmp(propname, zfs_userquota_prop_prefixes[type],
2844 strlen(zfs_userquota_prop_prefixes[type])) == 0)
2845 break;
2846 }
2847 if (type == ZFS_NUM_USERQUOTA_PROPS)
2848 return (EINVAL);
2849 *typep = type;
2850
2851 isuser = (type == ZFS_PROP_USERQUOTA ||
2852 type == ZFS_PROP_USERUSED);
2853
2854 cp = strchr(propname, '@') + 1;
2855
2856 if (strchr(cp, '@')) {
2857 /*
2858 * It's a SID name (eg "user@domain") that needs to be
2859 * turned into S-1-domainID-RID.
2860 */
2861 int flag = 0;
2862 idmap_stat stat, map_stat;
2863 uid_t pid;
2864 idmap_rid_t rid;
2865 idmap_get_handle_t *gh = NULL;
2866
2867 stat = idmap_get_create(&gh);
2868 if (stat != IDMAP_SUCCESS) {
2869 idmap_get_destroy(gh);
2870 return (ENOMEM);
2871 }
2872 if (zoned && getzoneid() == GLOBAL_ZONEID)
2873 return (ENOENT);
2874 if (isuser) {
2875 stat = idmap_getuidbywinname(cp, NULL, flag, &pid);
2876 if (stat < 0)
2877 return (ENOENT);
2878 stat = idmap_get_sidbyuid(gh, pid, flag, &numericsid,
2879 &rid, &map_stat);
2880 } else {
2881 stat = idmap_getgidbywinname(cp, NULL, flag, &pid);
2882 if (stat < 0)
2883 return (ENOENT);
2884 stat = idmap_get_sidbygid(gh, pid, flag, &numericsid,
2885 &rid, &map_stat);
2886 }
2887 if (stat < 0) {
2888 idmap_get_destroy(gh);
2889 return (ENOENT);
2890 }
2891 stat = idmap_get_mappings(gh);
2892 idmap_get_destroy(gh);
2893
2894 if (stat < 0) {
2895 return (ENOENT);
2896 }
2897 if (numericsid == NULL)
2898 return (ENOENT);
2899 cp = numericsid;
2900 *ridp = rid;
2901 /* will be further decoded below */
2902 }
2903
2904 if (strncmp(cp, "S-1-", 4) == 0) {
2905 /* It's a numeric SID (eg "S-1-234-567-89") */
2906 (void) strlcpy(domain, cp, domainlen);
2907 errno = 0;
2908 if (*ridp == 0) {
2909 cp = strrchr(domain, '-');
2910 *cp = '\0';
2911 cp++;
2912 *ridp = strtoull(cp, &end, 10);
2913 } else {
2914 end = "";
2915 }
2916 if (numericsid) {
2917 free(numericsid);
2918 numericsid = NULL;
2919 }
2920 if (errno != 0 || *end != '\0')
2921 return (EINVAL);
2922 } else if (!isdigit(*cp)) {
2923 /*
2924 * It's a user/group name (eg "user") that needs to be
2925 * turned into a uid/gid
2926 */
2927 if (zoned && getzoneid() == GLOBAL_ZONEID)
2928 return (ENOENT);
2929 if (isuser) {
2930 struct passwd *pw;
2931 pw = getpwnam(cp);
2932 if (pw == NULL)
2933 return (ENOENT);
2934 *ridp = pw->pw_uid;
2935 } else {
2936 struct group *gr;
2937 gr = getgrnam(cp);
2938 if (gr == NULL)
2939 return (ENOENT);
2940 *ridp = gr->gr_gid;
2941 }
2942 } else {
2943 /* It's a user/group ID (eg "12345"). */
2944 uid_t id = strtoul(cp, &end, 10);
2945 idmap_rid_t rid;
2946 char *mapdomain;
2947
2948 if (*end != '\0')
2949 return (EINVAL);
2950 if (id > MAXUID) {
2951 /* It's an ephemeral ID. */
2952 if (idmap_id_to_numeric_domain_rid(id, isuser,
2953 &mapdomain, &rid) != 0)
2954 return (ENOENT);
2955 (void) strlcpy(domain, mapdomain, domainlen);
2956 *ridp = rid;
2957 } else {
2958 *ridp = id;
2959 }
2960 }
2961
2962 ASSERT3P(numericsid, ==, NULL);
2963 return (0);
2964 }
2965
2966 static int
2967 zfs_prop_get_userquota_common(zfs_handle_t *zhp, const char *propname,
2968 uint64_t *propvalue, zfs_userquota_prop_t *typep)
2969 {
2970 int err;
2971 zfs_cmd_t zc = { 0 };
2972
2973 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
2974
2975 err = userquota_propname_decode(propname,
2976 zfs_prop_get_int(zhp, ZFS_PROP_ZONED),
2977 typep, zc.zc_value, sizeof (zc.zc_value), &zc.zc_guid);
2978 zc.zc_objset_type = *typep;
2979 if (err)
2980 return (err);
2981
2982 err = ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_USERSPACE_ONE, &zc);
2983 if (err)
2984 return (err);
2985
2986 *propvalue = zc.zc_cookie;
2987 return (0);
2988 }
2989
2990 int
2991 zfs_prop_get_userquota_int(zfs_handle_t *zhp, const char *propname,
2992 uint64_t *propvalue)
2993 {
2994 zfs_userquota_prop_t type;
2995
2996 return (zfs_prop_get_userquota_common(zhp, propname, propvalue,
2997 &type));
2998 }
2999
3000 int
3001 zfs_prop_get_userquota(zfs_handle_t *zhp, const char *propname,
3002 char *propbuf, int proplen, boolean_t literal)
3003 {
3004 int err;
3005 uint64_t propvalue;
3006 zfs_userquota_prop_t type;
3007
3008 err = zfs_prop_get_userquota_common(zhp, propname, &propvalue,
3009 &type);
3010
3011 if (err)
3012 return (err);
3013
3014 if (literal) {
3015 (void) snprintf(propbuf, proplen, "%llu", propvalue);
3016 } else if (propvalue == 0 &&
3017 (type == ZFS_PROP_USERQUOTA || type == ZFS_PROP_GROUPQUOTA)) {
3018 (void) strlcpy(propbuf, "none", proplen);
3019 } else {
3020 zfs_nicenum(propvalue, propbuf, proplen);
3021 }
3022 return (0);
3023 }
3024
3025 int
3026 zfs_prop_get_written_int(zfs_handle_t *zhp, const char *propname,
3027 uint64_t *propvalue)
3028 {
3029 int err;
3030 zfs_cmd_t zc = { 0 };
3031 const char *snapname;
3032
3033 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
3034
3035 snapname = strchr(propname, '@') + 1;
3036 if (strchr(snapname, '@')) {
3037 (void) strlcpy(zc.zc_value, snapname, sizeof (zc.zc_value));
3038 } else {
3039 /* snapname is the short name, append it to zhp's fsname */
3040 char *cp;
3041
3042 (void) strlcpy(zc.zc_value, zhp->zfs_name,
3043 sizeof (zc.zc_value));
3044 cp = strchr(zc.zc_value, '@');
3045 if (cp != NULL)
3046 *cp = '\0';
3047 (void) strlcat(zc.zc_value, "@", sizeof (zc.zc_value));
3048 (void) strlcat(zc.zc_value, snapname, sizeof (zc.zc_value));
3049 }
3050
3051 err = ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_SPACE_WRITTEN, &zc);
3052 if (err)
3053 return (err);
3054
3055 *propvalue = zc.zc_cookie;
3056 return (0);
3057 }
3058
3059 int
3060 zfs_prop_get_written(zfs_handle_t *zhp, const char *propname,
3061 char *propbuf, int proplen, boolean_t literal)
3062 {
3063 int err;
3064 uint64_t propvalue;
3065
3066 err = zfs_prop_get_written_int(zhp, propname, &propvalue);
3067
3068 if (err)
3069 return (err);
3070
3071 if (literal) {
3072 (void) snprintf(propbuf, proplen, "%llu", propvalue);
3073 } else {
3074 zfs_nicenum(propvalue, propbuf, proplen);
3075 }
3076 return (0);
3077 }
3078
3079 /*
3080 * Returns the name of the given zfs handle.
3081 */
3082 const char *
3083 zfs_get_name(const zfs_handle_t *zhp)
3084 {
3085 return (zhp->zfs_name);
3086 }
3087
3088 /*
3089 * Returns the name of the parent pool for the given zfs handle.
3090 */
3091 const char *
3092 zfs_get_pool_name(const zfs_handle_t *zhp)
3093 {
3094 return (zhp->zpool_hdl->zpool_name);
3095 }
3096
3097 /*
3098 * Returns the type of the given zfs handle.
3099 */
3100 zfs_type_t
3101 zfs_get_type(const zfs_handle_t *zhp)
3102 {
3103 return (zhp->zfs_type);
3104 }
3105
3106 /*
3107 * Is one dataset name a child dataset of another?
3108 *
3109 * Needs to handle these cases:
3110 * Dataset 1 "a/foo" "a/foo" "a/foo" "a/foo"
3111 * Dataset 2 "a/fo" "a/foobar" "a/bar/baz" "a/foo/bar"
3112 * Descendant? No. No. No. Yes.
3113 */
3114 static boolean_t
3115 is_descendant(const char *ds1, const char *ds2)
3116 {
3117 size_t d1len = strlen(ds1);
3118
3119 /* ds2 can't be a descendant if it's smaller */
3120 if (strlen(ds2) < d1len)
3121 return (B_FALSE);
3122
3123 /* otherwise, compare strings and verify that there's a '/' char */
3124 return (ds2[d1len] == '/' && (strncmp(ds1, ds2, d1len) == 0));
3125 }
3126
3127 /*
3128 * Given a complete name, return just the portion that refers to the parent.
3129 * Will return -1 if there is no parent (path is just the name of the
3130 * pool).
3131 */
3132 static int
3133 parent_name(const char *path, char *buf, size_t buflen)
3134 {
3135 char *slashp;
3136
3137 (void) strlcpy(buf, path, buflen);
3138
3139 if ((slashp = strrchr(buf, '/')) == NULL)
3140 return (-1);
3141 *slashp = '\0';
3142
3143 return (0);
3144 }
3145
3146 /*
3147 * If accept_ancestor is false, then check to make sure that the given path has
3148 * a parent, and that it exists. If accept_ancestor is true, then find the
3149 * closest existing ancestor for the given path. In prefixlen return the
3150 * length of already existing prefix of the given path. We also fetch the
3151 * 'zoned' property, which is used to validate property settings when creating
3152 * new datasets.
3153 */
3154 static int
3155 check_parents(libzfs_handle_t *hdl, const char *path, uint64_t *zoned,
3156 boolean_t accept_ancestor, int *prefixlen)
3157 {
3158 zfs_cmd_t zc = { 0 };
3159 char parent[ZFS_MAX_DATASET_NAME_LEN];
3160 char *slash;
3161 zfs_handle_t *zhp;
3162 char errbuf[1024];
3163 uint64_t is_zoned;
3164
3165 (void) snprintf(errbuf, sizeof (errbuf),
3166 dgettext(TEXT_DOMAIN, "cannot create '%s'"), path);
3167
3168 /* get parent, and check to see if this is just a pool */
3169 if (parent_name(path, parent, sizeof (parent)) != 0) {
3170 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3171 "missing dataset name"));
3172 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3173 }
3174
3175 /* check to see if the pool exists */
3176 if ((slash = strchr(parent, '/')) == NULL)
3177 slash = parent + strlen(parent);
3178 (void) strncpy(zc.zc_name, parent, slash - parent);
3179 zc.zc_name[slash - parent] = '\0';
3180 if (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_STATS, &zc) != 0 &&
3181 errno == ENOENT) {
3182 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3183 "no such pool '%s'"), zc.zc_name);
3184 return (zfs_error(hdl, EZFS_NOENT, errbuf));
3185 }
3186
3187 /* check to see if the parent dataset exists */
3188 while ((zhp = make_dataset_handle(hdl, parent)) == NULL) {
3189 if (errno == ENOENT && accept_ancestor) {
3190 /*
3191 * Go deeper to find an ancestor, give up on top level.
3192 */
3193 if (parent_name(parent, parent, sizeof (parent)) != 0) {
3194 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3195 "no such pool '%s'"), zc.zc_name);
3196 return (zfs_error(hdl, EZFS_NOENT, errbuf));
3197 }
3198 } else if (errno == ENOENT) {
3199 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3200 "parent does not exist"));
3201 return (zfs_error(hdl, EZFS_NOENT, errbuf));
3202 } else
3203 return (zfs_standard_error(hdl, errno, errbuf));
3204 }
3205
3206 is_zoned = zfs_prop_get_int(zhp, ZFS_PROP_ZONED);
3207 if (zoned != NULL)
3208 *zoned = is_zoned;
3209
3210 /* we are in a non-global zone, but parent is in the global zone */
3211 if (getzoneid() != GLOBAL_ZONEID && !is_zoned) {
3212 (void) zfs_standard_error(hdl, EPERM, errbuf);
3213 zfs_close(zhp);
3214 return (-1);
3215 }
3216
3217 /* make sure parent is a filesystem */
3218 if (zfs_get_type(zhp) != ZFS_TYPE_FILESYSTEM) {
3219 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3220 "parent is not a filesystem"));
3221 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
3222 zfs_close(zhp);
3223 return (-1);
3224 }
3225
3226 zfs_close(zhp);
3227 if (prefixlen != NULL)
3228 *prefixlen = strlen(parent);
3229 return (0);
3230 }
3231
3232 /*
3233 * Finds whether the dataset of the given type(s) exists.
3234 */
3235 boolean_t
3236 zfs_dataset_exists(libzfs_handle_t *hdl, const char *path, zfs_type_t types)
3237 {
3238 zfs_handle_t *zhp;
3239
3240 if (!zfs_validate_name(hdl, path, types, B_FALSE))
3241 return (B_FALSE);
3242
3243 /*
3244 * Try to get stats for the dataset, which will tell us if it exists.
3245 */
3246 if ((zhp = make_dataset_handle(hdl, path)) != NULL) {
3247 int ds_type = zhp->zfs_type;
3248
3249 zfs_close(zhp);
3250 if (types & ds_type)
3251 return (B_TRUE);
3252 }
3253 return (B_FALSE);
3254 }
3255
3256 /*
3257 * Given a path to 'target', create all the ancestors between
3258 * the prefixlen portion of the path, and the target itself.
3259 * Fail if the initial prefixlen-ancestor does not already exist.
3260 */
3261 int
3262 create_parents(libzfs_handle_t *hdl, char *target, int prefixlen)
3263 {
3264 zfs_handle_t *h;
3265 char *cp;
3266 const char *opname;
3267
3268 /* make sure prefix exists */
3269 cp = target + prefixlen;
3270 if (*cp != '/') {
3271 assert(strchr(cp, '/') == NULL);
3272 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM);
3273 } else {
3274 *cp = '\0';
3275 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM);
3276 *cp = '/';
3277 }
3278 if (h == NULL)
3279 return (-1);
3280 zfs_close(h);
3281
3282 /*
3283 * Attempt to create, mount, and share any ancestor filesystems,
3284 * up to the prefixlen-long one.
3285 */
3286 for (cp = target + prefixlen + 1;
3287 (cp = strchr(cp, '/')) != NULL; *cp = '/', cp++) {
3288
3289 *cp = '\0';
3290
3291 h = make_dataset_handle(hdl, target);
3292 if (h) {
3293 /* it already exists, nothing to do here */
3294 zfs_close(h);
3295 continue;
3296 }
3297
3298 if (zfs_create(hdl, target, ZFS_TYPE_FILESYSTEM,
3299 NULL) != 0) {
3300 opname = dgettext(TEXT_DOMAIN, "create");
3301 goto ancestorerr;
3302 }
3303
3304 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM);
3305 if (h == NULL) {
3306 opname = dgettext(TEXT_DOMAIN, "open");
3307 goto ancestorerr;
3308 }
3309
3310 if (zfs_mount(h, NULL, 0) != 0) {
3311 opname = dgettext(TEXT_DOMAIN, "mount");
3312 goto ancestorerr;
3313 }
3314
3315 if (zfs_share(h) != 0) {
3316 opname = dgettext(TEXT_DOMAIN, "share");
3317 goto ancestorerr;
3318 }
3319
3320 zfs_close(h);
3321 }
3322
3323 return (0);
3324
3325 ancestorerr:
3326 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3327 "failed to %s ancestor '%s'"), opname, target);
3328 return (-1);
3329 }
3330
3331 /*
3332 * Creates non-existing ancestors of the given path.
3333 */
3334 int
3335 zfs_create_ancestors(libzfs_handle_t *hdl, const char *path)
3336 {
3337 int prefix;
3338 char *path_copy;
3339 int rc = 0;
3340
3341 if (check_parents(hdl, path, NULL, B_TRUE, &prefix) != 0)
3342 return (-1);
3343
3344 if ((path_copy = strdup(path)) != NULL) {
3345 rc = create_parents(hdl, path_copy, prefix);
3346 free(path_copy);
3347 }
3348 if (path_copy == NULL || rc != 0)
3349 return (-1);
3350
3351 return (0);
3352 }
3353
3354 /*
3355 * Create a new filesystem or volume.
3356 */
3357 int
3358 zfs_create(libzfs_handle_t *hdl, const char *path, zfs_type_t type,
3359 nvlist_t *props)
3360 {
3361 int ret;
3362 uint64_t size = 0;
3363 uint64_t blocksize = zfs_prop_default_numeric(ZFS_PROP_VOLBLOCKSIZE);
3364 char errbuf[1024];
3365 uint64_t zoned;
3366 enum lzc_dataset_type ost;
3367 zpool_handle_t *zpool_handle;
3368
3369 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3370 "cannot create '%s'"), path);
3371
3372 /* validate the path, taking care to note the extended error message */
3373 if (!zfs_validate_name(hdl, path, type, B_TRUE))
3374 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3375
3376 /* validate parents exist */
3377 if (check_parents(hdl, path, &zoned, B_FALSE, NULL) != 0)
3378 return (-1);
3379
3380 /*
3381 * The failure modes when creating a dataset of a different type over
3382 * one that already exists is a little strange. In particular, if you
3383 * try to create a dataset on top of an existing dataset, the ioctl()
3384 * will return ENOENT, not EEXIST. To prevent this from happening, we
3385 * first try to see if the dataset exists.
3386 */
3387 if (zfs_dataset_exists(hdl, path, ZFS_TYPE_DATASET)) {
3388 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3389 "dataset already exists"));
3390 return (zfs_error(hdl, EZFS_EXISTS, errbuf));
3391 }
3392
3393 if (type == ZFS_TYPE_VOLUME)
3394 ost = LZC_DATSET_TYPE_ZVOL;
3395 else
3396 ost = LZC_DATSET_TYPE_ZFS;
3397
3398 /* open zpool handle for prop validation */
3399 char pool_path[ZFS_MAX_DATASET_NAME_LEN];
3400 (void) strlcpy(pool_path, path, sizeof (pool_path));
3401
3402 /* truncate pool_path at first slash */
3403 char *p = strchr(pool_path, '/');
3404 if (p != NULL)
3405 *p = '\0';
3406
3407 if ((zpool_handle = zpool_open(hdl, pool_path)) == NULL)
3408 return (-1);
3409
3410 if (props && (props = zfs_valid_proplist(hdl, type, props,
3411 zoned, NULL, zpool_handle, errbuf)) == 0) {
3412 zpool_close(zpool_handle);
3413 return (-1);
3414 }
3415 zpool_close(zpool_handle);
3416
3417 if (type == ZFS_TYPE_VOLUME) {
3418 /*
3419 * If we are creating a volume, the size and block size must
3420 * satisfy a few restraints. First, the blocksize must be a
3421 * valid block size between SPA_{MIN,MAX}BLOCKSIZE. Second, the
3422 * volsize must be a multiple of the block size, and cannot be
3423 * zero.
3424 */
3425 if (props == NULL || nvlist_lookup_uint64(props,
3426 zfs_prop_to_name(ZFS_PROP_VOLSIZE), &size) != 0) {
3427 nvlist_free(props);
3428 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3429 "missing volume size"));
3430 return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3431 }
3432
3433 if ((ret = nvlist_lookup_uint64(props,
3434 zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
3435 &blocksize)) != 0) {
3436 if (ret == ENOENT) {
3437 blocksize = zfs_prop_default_numeric(
3438 ZFS_PROP_VOLBLOCKSIZE);
3439 } else {
3440 nvlist_free(props);
3441 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3442 "missing volume block size"));
3443 return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3444 }
3445 }
3446
3447 if (size == 0) {
3448 nvlist_free(props);
3449 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3450 "volume size cannot be zero"));
3451 return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3452 }
3453
3454 if (size % blocksize != 0) {
3455 nvlist_free(props);
3456 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3457 "volume size must be a multiple of volume block "
3458 "size"));
3459 return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3460 }
3461 }
3462
3463 /* create the dataset */
3464 ret = lzc_create(path, ost, props);
3465 nvlist_free(props);
3466
3467 /* check for failure */
3468 if (ret != 0) {
3469 char parent[ZFS_MAX_DATASET_NAME_LEN];
3470 (void) parent_name(path, parent, sizeof (parent));
3471
3472 switch (errno) {
3473 case ENOENT:
3474 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3475 "no such parent '%s'"), parent);
3476 return (zfs_error(hdl, EZFS_NOENT, errbuf));
3477
3478 case EINVAL:
3479 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3480 "parent '%s' is not a filesystem"), parent);
3481 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
3482
3483 case ENOTSUP:
3484 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3485 "pool must be upgraded to set this "
3486 "property or value"));
3487 return (zfs_error(hdl, EZFS_BADVERSION, errbuf));
3488 #ifdef _ILP32
3489 case EOVERFLOW:
3490 /*
3491 * This platform can't address a volume this big.
3492 */
3493 if (type == ZFS_TYPE_VOLUME)
3494 return (zfs_error(hdl, EZFS_VOLTOOBIG,
3495 errbuf));
3496 #endif
3497 /* FALLTHROUGH */
3498 default:
3499 return (zfs_standard_error(hdl, errno, errbuf));
3500 }
3501 }
3502
3503 return (0);
3504 }
3505
3506 /*
3507 * Destroys the given dataset. The caller must make sure that the filesystem
3508 * isn't mounted, and that there are no active dependents. If the file system
3509 * does not exist this function does nothing.
3510 */
3511 int
3512 zfs_destroy(zfs_handle_t *zhp, boolean_t defer)
3513 {
3514 zfs_cmd_t zc = { 0 };
3515
3516 if (zhp->zfs_type == ZFS_TYPE_BOOKMARK) {
3517 nvlist_t *nv = fnvlist_alloc();
3518 fnvlist_add_boolean(nv, zhp->zfs_name);
3519 int error = lzc_destroy_bookmarks(nv, NULL);
3520 fnvlist_free(nv);
3521 if (error != 0) {
3522 return (zfs_standard_error_fmt(zhp->zfs_hdl, errno,
3523 dgettext(TEXT_DOMAIN, "cannot destroy '%s'"),
3524 zhp->zfs_name));
3525 }
3526 return (0);
3527 }
3528
3529 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
3530
3531 if (ZFS_IS_VOLUME(zhp)) {
3532 zc.zc_objset_type = DMU_OST_ZVOL;
3533 } else {
3534 zc.zc_objset_type = DMU_OST_ZFS;
3535 }
3536
3537 zc.zc_defer_destroy = defer;
3538 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_DESTROY, &zc) != 0 &&
3539 errno != ENOENT) {
3540 return (zfs_standard_error_fmt(zhp->zfs_hdl, errno,
3541 dgettext(TEXT_DOMAIN, "cannot destroy '%s'"),
3542 zhp->zfs_name));
3543 }
3544
3545 remove_mountpoint(zhp);
3546
3547 return (0);
3548 }
3549
3550 struct destroydata {
3551 nvlist_t *nvl;
3552 const char *snapname;
3553 };
3554
3555 static int
3556 zfs_check_snap_cb(zfs_handle_t *zhp, void *arg)
3557 {
3558 struct destroydata *dd = arg;
3559 char name[ZFS_MAX_DATASET_NAME_LEN];
3560 int rv = 0;
3561
3562 (void) snprintf(name, sizeof (name),
3563 "%s@%s", zhp->zfs_name, dd->snapname);
3564
3565 if (lzc_exists(name))
3566 verify(nvlist_add_boolean(dd->nvl, name) == 0);
3567
3568 rv = zfs_iter_filesystems(zhp, zfs_check_snap_cb, dd);
3569 zfs_close(zhp);
3570 return (rv);
3571 }
3572
3573 /*
3574 * Destroys all snapshots with the given name in zhp & descendants.
3575 */
3576 int
3577 zfs_destroy_snaps(zfs_handle_t *zhp, char *snapname, boolean_t defer)
3578 {
3579 int ret;
3580 struct destroydata dd = { 0 };
3581
3582 dd.snapname = snapname;
3583 verify(nvlist_alloc(&dd.nvl, NV_UNIQUE_NAME, 0) == 0);
3584 (void) zfs_check_snap_cb(zfs_handle_dup(zhp), &dd);
3585
3586 if (nvlist_empty(dd.nvl)) {
3587 ret = zfs_standard_error_fmt(zhp->zfs_hdl, ENOENT,
3588 dgettext(TEXT_DOMAIN, "cannot destroy '%s@%s'"),
3589 zhp->zfs_name, snapname);
3590 } else {
3591 ret = zfs_destroy_snaps_nvl(zhp->zfs_hdl, dd.nvl, defer);
3592 }
3593 nvlist_free(dd.nvl);
3594 return (ret);
3595 }
3596
3597 /*
3598 * Destroys all the snapshots named in the nvlist.
3599 */
3600 int
3601 zfs_destroy_snaps_nvl(libzfs_handle_t *hdl, nvlist_t *snaps, boolean_t defer)
3602 {
3603 int ret;
3604 nvlist_t *errlist = NULL;
3605
3606 ret = lzc_destroy_snaps(snaps, defer, &errlist);
3607
3608 if (ret == 0) {
3609 nvlist_free(errlist);
3610 return (0);
3611 }
3612
3613 if (nvlist_empty(errlist)) {
3614 char errbuf[1024];
3615 (void) snprintf(errbuf, sizeof (errbuf),
3616 dgettext(TEXT_DOMAIN, "cannot destroy snapshots"));
3617
3618 ret = zfs_standard_error(hdl, ret, errbuf);
3619 }
3620 for (nvpair_t *pair = nvlist_next_nvpair(errlist, NULL);
3621 pair != NULL; pair = nvlist_next_nvpair(errlist, pair)) {
3622 char errbuf[1024];
3623 (void) snprintf(errbuf, sizeof (errbuf),
3624 dgettext(TEXT_DOMAIN, "cannot destroy snapshot %s"),
3625 nvpair_name(pair));
3626
3627 switch (fnvpair_value_int32(pair)) {
3628 case EEXIST:
3629 zfs_error_aux(hdl,
3630 dgettext(TEXT_DOMAIN, "snapshot is cloned"));
3631 ret = zfs_error(hdl, EZFS_EXISTS, errbuf);
3632 break;
3633 default:
3634 ret = zfs_standard_error(hdl, errno, errbuf);
3635 break;
3636 }
3637 }
3638
3639 nvlist_free(errlist);
3640 return (ret);
3641 }
3642
3643 /*
3644 * Clones the given dataset. The target must be of the same type as the source.
3645 */
3646 int
3647 zfs_clone(zfs_handle_t *zhp, const char *target, nvlist_t *props)
3648 {
3649 char parent[ZFS_MAX_DATASET_NAME_LEN];
3650 int ret;
3651 char errbuf[1024];
3652 libzfs_handle_t *hdl = zhp->zfs_hdl;
3653 uint64_t zoned;
3654
3655 assert(zhp->zfs_type == ZFS_TYPE_SNAPSHOT);
3656
3657 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3658 "cannot create '%s'"), target);
3659
3660 /* validate the target/clone name */
3661 if (!zfs_validate_name(hdl, target, ZFS_TYPE_FILESYSTEM, B_TRUE))
3662 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3663
3664 /* validate parents exist */
3665 if (check_parents(hdl, target, &zoned, B_FALSE, NULL) != 0)
3666 return (-1);
3667
3668 (void) parent_name(target, parent, sizeof (parent));
3669
3670 /* do the clone */
3671
3672 if (props) {
3673 zfs_type_t type;
3674 if (ZFS_IS_VOLUME(zhp)) {
3675 type = ZFS_TYPE_VOLUME;
3676 } else {
3677 type = ZFS_TYPE_FILESYSTEM;
3678 }
3679 if ((props = zfs_valid_proplist(hdl, type, props, zoned,
3680 zhp, zhp->zpool_hdl, errbuf)) == NULL)
3681 return (-1);
3682 }
3683
3684 ret = lzc_clone(target, zhp->zfs_name, props);
3685 nvlist_free(props);
3686
3687 if (ret != 0) {
3688 switch (errno) {
3689
3690 case ENOENT:
3691 /*
3692 * The parent doesn't exist. We should have caught this
3693 * above, but there may a race condition that has since
3694 * destroyed the parent.
3695 *
3696 * At this point, we don't know whether it's the source
3697 * that doesn't exist anymore, or whether the target
3698 * dataset doesn't exist.
3699 */
3700 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
3701 "no such parent '%s'"), parent);
3702 return (zfs_error(zhp->zfs_hdl, EZFS_NOENT, errbuf));
3703
3704 case EXDEV:
3705 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
3706 "source and target pools differ"));
3707 return (zfs_error(zhp->zfs_hdl, EZFS_CROSSTARGET,
3708 errbuf));
3709
3710 default:
3711 return (zfs_standard_error(zhp->zfs_hdl, errno,
3712 errbuf));
3713 }
3714 }
3715
3716 return (ret);
3717 }
3718
3719 /*
3720 * Promotes the given clone fs to be the clone parent.
3721 */
3722 int
3723 zfs_promote(zfs_handle_t *zhp)
3724 {
3725 libzfs_handle_t *hdl = zhp->zfs_hdl;
3726 char snapname[ZFS_MAX_DATASET_NAME_LEN];
3727 int ret;
3728 char errbuf[1024];
3729
3730 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3731 "cannot promote '%s'"), zhp->zfs_name);
3732
3733 if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) {
3734 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3735 "snapshots can not be promoted"));
3736 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
3737 }
3738
3739 if (zhp->zfs_dmustats.dds_origin[0] == '\0') {
3740 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3741 "not a cloned filesystem"));
3742 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
3743 }
3744
3745 ret = lzc_promote(zhp->zfs_name, snapname, sizeof (snapname));
3746
3747 if (ret != 0) {
3748 switch (ret) {
3749 case EEXIST:
3750 /* There is a conflicting snapshot name. */
3751 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3752 "conflicting snapshot '%s' from parent '%s'"),
3753 snapname, zhp->zfs_dmustats.dds_origin);
3754 return (zfs_error(hdl, EZFS_EXISTS, errbuf));
3755
3756 default:
3757 return (zfs_standard_error(hdl, ret, errbuf));
3758 }
3759 }
3760 return (ret);
3761 }
3762
3763 typedef struct snapdata {
3764 nvlist_t *sd_nvl;
3765 const char *sd_snapname;
3766 } snapdata_t;
3767
3768 static int
3769 zfs_snapshot_cb(zfs_handle_t *zhp, void *arg)
3770 {
3771 snapdata_t *sd = arg;
3772 char name[ZFS_MAX_DATASET_NAME_LEN];
3773 int rv = 0;
3774
3775 if (zfs_prop_get_int(zhp, ZFS_PROP_INCONSISTENT) == 0) {
3776 (void) snprintf(name, sizeof (name),
3777 "%s@%s", zfs_get_name(zhp), sd->sd_snapname);
3778
3779 fnvlist_add_boolean(sd->sd_nvl, name);
3780
3781 rv = zfs_iter_filesystems(zhp, zfs_snapshot_cb, sd);
3782 }
3783 zfs_close(zhp);
3784
3785 return (rv);
3786 }
3787
3788 /*
3789 * Creates snapshots. The keys in the snaps nvlist are the snapshots to be
3790 * created.
3791 */
3792 int
3793 zfs_snapshot_nvl(libzfs_handle_t *hdl, nvlist_t *snaps, nvlist_t *props)
3794 {
3795 int ret;
3796 char errbuf[1024];
3797 nvpair_t *elem;
3798 nvlist_t *errors;
3799
3800 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3801 "cannot create snapshots "));
3802
3803 elem = NULL;
3804 while ((elem = nvlist_next_nvpair(snaps, elem)) != NULL) {
3805 const char *snapname = nvpair_name(elem);
3806
3807 /* validate the target name */
3808 if (!zfs_validate_name(hdl, snapname, ZFS_TYPE_SNAPSHOT,
3809 B_TRUE)) {
3810 (void) snprintf(errbuf, sizeof (errbuf),
3811 dgettext(TEXT_DOMAIN,
3812 "cannot create snapshot '%s'"), snapname);
3813 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3814 }
3815 }
3816
3817 /*
3818 * get pool handle for prop validation. assumes all snaps are in the
3819 * same pool, as does lzc_snapshot (below).
3820 */
3821 char pool[ZFS_MAX_DATASET_NAME_LEN];
3822 elem = nvlist_next_nvpair(snaps, NULL);
3823 (void) strlcpy(pool, nvpair_name(elem), sizeof (pool));
3824 pool[strcspn(pool, "/@")] = '\0';
3825 zpool_handle_t *zpool_hdl = zpool_open(hdl, pool);
3826
3827 if (props != NULL &&
3828 (props = zfs_valid_proplist(hdl, ZFS_TYPE_SNAPSHOT,
3829 props, B_FALSE, NULL, zpool_hdl, errbuf)) == NULL) {
3830 zpool_close(zpool_hdl);
3831 return (-1);
3832 }
3833 zpool_close(zpool_hdl);
3834
3835 ret = lzc_snapshot(snaps, props, &errors);
3836
3837 if (ret != 0) {
3838 boolean_t printed = B_FALSE;
3839 for (elem = nvlist_next_nvpair(errors, NULL);
3840 elem != NULL;
3841 elem = nvlist_next_nvpair(errors, elem)) {
3842 (void) snprintf(errbuf, sizeof (errbuf),
3843 dgettext(TEXT_DOMAIN,
3844 "cannot create snapshot '%s'"), nvpair_name(elem));
3845 (void) zfs_standard_error(hdl,
3846 fnvpair_value_int32(elem), errbuf);
3847 printed = B_TRUE;
3848 }
3849 if (!printed) {
3850 switch (ret) {
3851 case EXDEV:
3852 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3853 "multiple snapshots of same "
3854 "fs not allowed"));
3855 (void) zfs_error(hdl, EZFS_EXISTS, errbuf);
3856
3857 break;
3858 default:
3859 (void) zfs_standard_error(hdl, ret, errbuf);
3860 }
3861 }
3862 }
3863
3864 nvlist_free(props);
3865 nvlist_free(errors);
3866 return (ret);
3867 }
3868
3869 int
3870 zfs_snapshot(libzfs_handle_t *hdl, const char *path, boolean_t recursive,
3871 nvlist_t *props)
3872 {
3873 int ret;
3874 snapdata_t sd = { 0 };
3875 char fsname[ZFS_MAX_DATASET_NAME_LEN];
3876 char *cp;
3877 zfs_handle_t *zhp;
3878 char errbuf[1024];
3879
3880 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3881 "cannot snapshot %s"), path);
3882
3883 if (!zfs_validate_name(hdl, path, ZFS_TYPE_SNAPSHOT, B_TRUE))
3884 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3885
3886 (void) strlcpy(fsname, path, sizeof (fsname));
3887 cp = strchr(fsname, '@');
3888 *cp = '\0';
3889 sd.sd_snapname = cp + 1;
3890
3891 if ((zhp = zfs_open(hdl, fsname, ZFS_TYPE_FILESYSTEM |
3892 ZFS_TYPE_VOLUME)) == NULL) {
3893 return (-1);
3894 }
3895
3896 verify(nvlist_alloc(&sd.sd_nvl, NV_UNIQUE_NAME, 0) == 0);
3897 if (recursive) {
3898 (void) zfs_snapshot_cb(zfs_handle_dup(zhp), &sd);
3899 } else {
3900 fnvlist_add_boolean(sd.sd_nvl, path);
3901 }
3902
3903 ret = zfs_snapshot_nvl(hdl, sd.sd_nvl, props);
3904 nvlist_free(sd.sd_nvl);
3905 zfs_close(zhp);
3906 return (ret);
3907 }
3908
3909 /*
3910 * Destroy any more recent snapshots. We invoke this callback on any dependents
3911 * of the snapshot first. If the 'cb_dependent' member is non-zero, then this
3912 * is a dependent and we should just destroy it without checking the transaction
3913 * group.
3914 */
3915 typedef struct rollback_data {
3916 const char *cb_target; /* the snapshot */
3917 uint64_t cb_create; /* creation time reference */
3918 boolean_t cb_error;
3919 boolean_t cb_force;
3920 } rollback_data_t;
3921
3922 static int
3923 rollback_destroy_dependent(zfs_handle_t *zhp, void *data)
3924 {
3925 rollback_data_t *cbp = data;
3926 prop_changelist_t *clp;
3927
3928 /* We must destroy this clone; first unmount it */
3929 clp = changelist_gather(zhp, ZFS_PROP_NAME, 0,
3930 cbp->cb_force ? MS_FORCE: 0);
3931 if (clp == NULL || changelist_prefix(clp) != 0) {
3932 cbp->cb_error = B_TRUE;
3933 zfs_close(zhp);
3934 return (0);
3935 }
3936 if (zfs_destroy(zhp, B_FALSE) != 0)
3937 cbp->cb_error = B_TRUE;
3938 else
3939 changelist_remove(clp, zhp->zfs_name);
3940 (void) changelist_postfix(clp);
3941 changelist_free(clp);
3942
3943 zfs_close(zhp);
3944 return (0);
3945 }
3946
3947 static int
3948 rollback_destroy(zfs_handle_t *zhp, void *data)
3949 {
3950 rollback_data_t *cbp = data;
3951
3952 if (zfs_prop_get_int(zhp, ZFS_PROP_CREATETXG) > cbp->cb_create) {
3953 cbp->cb_error |= zfs_iter_dependents(zhp, B_FALSE,
3954 rollback_destroy_dependent, cbp);
3955
3956 cbp->cb_error |= zfs_destroy(zhp, B_FALSE);
3957 }
3958
3959 zfs_close(zhp);
3960 return (0);
3961 }
3962
3963 /*
3964 * Given a dataset, rollback to a specific snapshot, discarding any
3965 * data changes since then and making it the active dataset.
3966 *
3967 * Any snapshots and bookmarks more recent than the target are
3968 * destroyed, along with their dependents (i.e. clones).
3969 */
3970 int
3971 zfs_rollback(zfs_handle_t *zhp, zfs_handle_t *snap, boolean_t force)
3972 {
3973 rollback_data_t cb = { 0 };
3974 int err;
3975 boolean_t restore_resv = 0;
3976 uint64_t old_volsize = 0, new_volsize;
3977 zfs_prop_t resv_prop;
3978
3979 assert(zhp->zfs_type == ZFS_TYPE_FILESYSTEM ||
3980 zhp->zfs_type == ZFS_TYPE_VOLUME);
3981
3982 /*
3983 * Destroy all recent snapshots and their dependents.
3984 */
3985 cb.cb_force = force;
3986 cb.cb_target = snap->zfs_name;
3987 cb.cb_create = zfs_prop_get_int(snap, ZFS_PROP_CREATETXG);
3988 (void) zfs_iter_snapshots(zhp, B_FALSE, rollback_destroy, &cb);
3989 (void) zfs_iter_bookmarks(zhp, rollback_destroy, &cb);
3990
3991 if (cb.cb_error)
3992 return (-1);
3993
3994 /*
3995 * Now that we have verified that the snapshot is the latest,
3996 * rollback to the given snapshot.
3997 */
3998
3999 if (zhp->zfs_type == ZFS_TYPE_VOLUME) {
4000 if (zfs_which_resv_prop(zhp, &resv_prop) < 0)
4001 return (-1);
4002 old_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE);
4003 restore_resv =
4004 (old_volsize == zfs_prop_get_int(zhp, resv_prop));
4005 }
4006
4007 /*
4008 * Pass both the filesystem and the wanted snapshot names,
4009 * we would get an error back if the snapshot is destroyed or
4010 * a new snapshot is created before this request is processed.
4011 */
4012 err = lzc_rollback_to(zhp->zfs_name, snap->zfs_name);
4013 if (err == EXDEV) {
4014 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
4015 "'%s' is not the latest snapshot"), snap->zfs_name);
4016 (void) zfs_error_fmt(zhp->zfs_hdl, EZFS_BUSY,
4017 dgettext(TEXT_DOMAIN, "cannot rollback '%s'"),
4018 zhp->zfs_name);
4019 return (err);
4020 } else if (err != 0) {
4021 (void) zfs_standard_error_fmt(zhp->zfs_hdl, errno,
4022 dgettext(TEXT_DOMAIN, "cannot rollback '%s'"),
4023 zhp->zfs_name);
4024 return (err);
4025 }
4026
4027 /*
4028 * For volumes, if the pre-rollback volsize matched the pre-
4029 * rollback reservation and the volsize has changed then set
4030 * the reservation property to the post-rollback volsize.
4031 * Make a new handle since the rollback closed the dataset.
4032 */
4033 if ((zhp->zfs_type == ZFS_TYPE_VOLUME) &&
4034 (zhp = make_dataset_handle(zhp->zfs_hdl, zhp->zfs_name))) {
4035 if (restore_resv) {
4036 new_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE);
4037 if (old_volsize != new_volsize)
4038 err = zfs_prop_set_int(zhp, resv_prop,
4039 new_volsize);
4040 }
4041 zfs_close(zhp);
4042 }
4043 return (err);
4044 }
4045
4046 /*
4047 * Renames the given dataset.
4048 */
4049 int
4050 zfs_rename(zfs_handle_t *zhp, const char *target, boolean_t recursive,
4051 boolean_t force_unmount)
4052 {
4053 int ret = 0;
4054 zfs_cmd_t zc = { 0 };
4055 char *delim;
4056 prop_changelist_t *cl = NULL;
4057 zfs_handle_t *zhrp = NULL;
4058 char *parentname = NULL;
4059 char parent[ZFS_MAX_DATASET_NAME_LEN];
4060 libzfs_handle_t *hdl = zhp->zfs_hdl;
4061 char errbuf[1024];
4062
4063 /* if we have the same exact name, just return success */
4064 if (strcmp(zhp->zfs_name, target) == 0)
4065 return (0);
4066
4067 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
4068 "cannot rename to '%s'"), target);
4069
4070 /*
4071 * Make sure the target name is valid
4072 */
4073 if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) {
4074 if ((strchr(target, '@') == NULL) ||
4075 *target == '@') {
4076 /*
4077 * Snapshot target name is abbreviated,
4078 * reconstruct full dataset name
4079 */
4080 (void) strlcpy(parent, zhp->zfs_name,
4081 sizeof (parent));
4082 delim = strchr(parent, '@');
4083 if (strchr(target, '@') == NULL)
4084 *(++delim) = '\0';
4085 else
4086 *delim = '\0';
4087 (void) strlcat(parent, target, sizeof (parent));
4088 target = parent;
4089 } else {
4090 /*
4091 * Make sure we're renaming within the same dataset.
4092 */
4093 delim = strchr(target, '@');
4094 if (strncmp(zhp->zfs_name, target, delim - target)
4095 != 0 || zhp->zfs_name[delim - target] != '@') {
4096 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4097 "snapshots must be part of same "
4098 "dataset"));
4099 return (zfs_error(hdl, EZFS_CROSSTARGET,
4100 errbuf));
4101 }
4102 }
4103 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE))
4104 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
4105 } else {
4106 if (recursive) {
4107 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4108 "recursive rename must be a snapshot"));
4109 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
4110 }
4111
4112 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE))
4113 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
4114
4115 /* validate parents */
4116 if (check_parents(hdl, target, NULL, B_FALSE, NULL) != 0)
4117 return (-1);
4118
4119 /* make sure we're in the same pool */
4120 verify((delim = strchr(target, '/')) != NULL);
4121 if (strncmp(zhp->zfs_name, target, delim - target) != 0 ||
4122 zhp->zfs_name[delim - target] != '/') {
4123 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4124 "datasets must be within same pool"));
4125 return (zfs_error(hdl, EZFS_CROSSTARGET, errbuf));
4126 }
4127
4128 /* new name cannot be a child of the current dataset name */
4129 if (is_descendant(zhp->zfs_name, target)) {
4130 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4131 "New dataset name cannot be a descendant of "
4132 "current dataset name"));
4133 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
4134 }
4135 }
4136
4137 (void) snprintf(errbuf, sizeof (errbuf),
4138 dgettext(TEXT_DOMAIN, "cannot rename '%s'"), zhp->zfs_name);
4139
4140 if (getzoneid() == GLOBAL_ZONEID &&
4141 zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) {
4142 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4143 "dataset is used in a non-global zone"));
4144 return (zfs_error(hdl, EZFS_ZONED, errbuf));
4145 }
4146
4147 if (recursive) {
4148 parentname = zfs_strdup(zhp->zfs_hdl, zhp->zfs_name);
4149 if (parentname == NULL) {
4150 ret = -1;
4151 goto error;
4152 }
4153 delim = strchr(parentname, '@');
4154 *delim = '\0';
4155 zhrp = zfs_open(zhp->zfs_hdl, parentname, ZFS_TYPE_DATASET);
4156 if (zhrp == NULL) {
4157 ret = -1;
4158 goto error;
4159 }
4160 } else if (zhp->zfs_type != ZFS_TYPE_SNAPSHOT) {
4161 if ((cl = changelist_gather(zhp, ZFS_PROP_NAME, 0,
4162 force_unmount ? MS_FORCE : 0)) == NULL)
4163 return (-1);
4164
4165 if (changelist_haszonedchild(cl)) {
4166 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4167 "child dataset with inherited mountpoint is used "
4168 "in a non-global zone"));
4169 (void) zfs_error(hdl, EZFS_ZONED, errbuf);
4170 ret = -1;
4171 goto error;
4172 }
4173
4174 if ((ret = changelist_prefix(cl)) != 0)
4175 goto error;
4176 }
4177
4178 if (ZFS_IS_VOLUME(zhp))
4179 zc.zc_objset_type = DMU_OST_ZVOL;
4180 else
4181 zc.zc_objset_type = DMU_OST_ZFS;
4182
4183 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
4184 (void) strlcpy(zc.zc_value, target, sizeof (zc.zc_value));
4185
4186 zc.zc_cookie = recursive;
4187
4188 if ((ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_RENAME, &zc)) != 0) {
4189 /*
4190 * if it was recursive, the one that actually failed will
4191 * be in zc.zc_name
4192 */
4193 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
4194 "cannot rename '%s'"), zc.zc_name);
4195
4196 if (recursive && errno == EEXIST) {
4197 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4198 "a child dataset already has a snapshot "
4199 "with the new name"));
4200 (void) zfs_error(hdl, EZFS_EXISTS, errbuf);
4201 } else {
4202 (void) zfs_standard_error(zhp->zfs_hdl, errno, errbuf);
4203 }
4204
4205 /*
4206 * On failure, we still want to remount any filesystems that
4207 * were previously mounted, so we don't alter the system state.
4208 */
4209 if (cl != NULL)
4210 (void) changelist_postfix(cl);
4211 } else {
4212 if (cl != NULL) {
4213 changelist_rename(cl, zfs_get_name(zhp), target);
4214 ret = changelist_postfix(cl);
4215 }
4216 }
4217
4218 error:
4219 if (parentname != NULL) {
4220 free(parentname);
4221 }
4222 if (zhrp != NULL) {
4223 zfs_close(zhrp);
4224 }
4225 if (cl != NULL) {
4226 changelist_free(cl);
4227 }
4228 return (ret);
4229 }
4230
4231 nvlist_t *
4232 zfs_get_user_props(zfs_handle_t *zhp)
4233 {
4234 return (zhp->zfs_user_props);
4235 }
4236
4237 nvlist_t *
4238 zfs_get_recvd_props(zfs_handle_t *zhp)
4239 {
4240 if (zhp->zfs_recvd_props == NULL)
4241 if (get_recvd_props_ioctl(zhp) != 0)
4242 return (NULL);
4243 return (zhp->zfs_recvd_props);
4244 }
4245
4246 /*
4247 * This function is used by 'zfs list' to determine the exact set of columns to
4248 * display, and their maximum widths. This does two main things:
4249 *
4250 * - If this is a list of all properties, then expand the list to include
4251 * all native properties, and set a flag so that for each dataset we look
4252 * for new unique user properties and add them to the list.
4253 *
4254 * - For non fixed-width properties, keep track of the maximum width seen
4255 * so that we can size the column appropriately. If the user has
4256 * requested received property values, we also need to compute the width
4257 * of the RECEIVED column.
4258 */
4259 int
4260 zfs_expand_proplist(zfs_handle_t *zhp, zprop_list_t **plp, boolean_t received,
4261 boolean_t literal)
4262 {
4263 libzfs_handle_t *hdl = zhp->zfs_hdl;
4264 zprop_list_t *entry;
4265 zprop_list_t **last, **start;
4266 nvlist_t *userprops, *propval;
4267 nvpair_t *elem;
4268 char *strval;
4269 char buf[ZFS_MAXPROPLEN];
4270
4271 if (zprop_expand_list(hdl, plp, ZFS_TYPE_DATASET) != 0)
4272 return (-1);
4273
4274 userprops = zfs_get_user_props(zhp);
4275
4276 entry = *plp;
4277 if (entry->pl_all && nvlist_next_nvpair(userprops, NULL) != NULL) {
4278 /*
4279 * Go through and add any user properties as necessary. We
4280 * start by incrementing our list pointer to the first
4281 * non-native property.
4282 */
4283 start = plp;
4284 while (*start != NULL) {
4285 if ((*start)->pl_prop == ZPROP_INVAL)
4286 break;
4287 start = &(*start)->pl_next;
4288 }
4289
4290 elem = NULL;
4291 while ((elem = nvlist_next_nvpair(userprops, elem)) != NULL) {
4292 /*
4293 * See if we've already found this property in our list.
4294 */
4295 for (last = start; *last != NULL;
4296 last = &(*last)->pl_next) {
4297 if (strcmp((*last)->pl_user_prop,
4298 nvpair_name(elem)) == 0)
4299 break;
4300 }
4301
4302 if (*last == NULL) {
4303 if ((entry = zfs_alloc(hdl,
4304 sizeof (zprop_list_t))) == NULL ||
4305 ((entry->pl_user_prop = zfs_strdup(hdl,
4306 nvpair_name(elem)))) == NULL) {
4307 free(entry);
4308 return (-1);
4309 }
4310
4311 entry->pl_prop = ZPROP_INVAL;
4312 entry->pl_width = strlen(nvpair_name(elem));
4313 entry->pl_all = B_TRUE;
4314 *last = entry;
4315 }
4316 }
4317 }
4318
4319 /*
4320 * Now go through and check the width of any non-fixed columns
4321 */
4322 for (entry = *plp; entry != NULL; entry = entry->pl_next) {
4323 if (entry->pl_fixed && !literal)
4324 continue;
4325
4326 if (entry->pl_prop != ZPROP_INVAL) {
4327 if (zfs_prop_get(zhp, entry->pl_prop,
4328 buf, sizeof (buf), NULL, NULL, 0, literal) == 0) {
4329 if (strlen(buf) > entry->pl_width)
4330 entry->pl_width = strlen(buf);
4331 }
4332 if (received && zfs_prop_get_recvd(zhp,
4333 zfs_prop_to_name(entry->pl_prop),
4334 buf, sizeof (buf), literal) == 0)
4335 if (strlen(buf) > entry->pl_recvd_width)
4336 entry->pl_recvd_width = strlen(buf);
4337 } else {
4338 if (nvlist_lookup_nvlist(userprops, entry->pl_user_prop,
4339 &propval) == 0) {
4340 verify(nvlist_lookup_string(propval,
4341 ZPROP_VALUE, &strval) == 0);
4342 if (strlen(strval) > entry->pl_width)
4343 entry->pl_width = strlen(strval);
4344 }
4345 if (received && zfs_prop_get_recvd(zhp,
4346 entry->pl_user_prop,
4347 buf, sizeof (buf), literal) == 0)
4348 if (strlen(buf) > entry->pl_recvd_width)
4349 entry->pl_recvd_width = strlen(buf);
4350 }
4351 }
4352
4353 return (0);
4354 }
4355
4356 int
4357 zfs_deleg_share_nfs(libzfs_handle_t *hdl, char *dataset, char *path,
4358 char *resource, void *export, void *sharetab,
4359 int sharemax, zfs_share_op_t operation)
4360 {
4361 zfs_cmd_t zc = { 0 };
4362 int error;
4363
4364 (void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name));
4365 (void) strlcpy(zc.zc_value, path, sizeof (zc.zc_value));
4366 if (resource)
4367 (void) strlcpy(zc.zc_string, resource, sizeof (zc.zc_string));
4368 zc.zc_share.z_sharedata = (uint64_t)(uintptr_t)sharetab;
4369 zc.zc_share.z_exportdata = (uint64_t)(uintptr_t)export;
4370 zc.zc_share.z_sharetype = operation;
4371 zc.zc_share.z_sharemax = sharemax;
4372 error = ioctl(hdl->libzfs_fd, ZFS_IOC_SHARE, &zc);
4373 return (error);
4374 }
4375
4376 void
4377 zfs_prune_proplist(zfs_handle_t *zhp, uint8_t *props)
4378 {
4379 nvpair_t *curr;
4380
4381 /*
4382 * Keep a reference to the props-table against which we prune the
4383 * properties.
4384 */
4385 zhp->zfs_props_table = props;
4386
4387 curr = nvlist_next_nvpair(zhp->zfs_props, NULL);
4388
4389 while (curr) {
4390 zfs_prop_t zfs_prop = zfs_name_to_prop(nvpair_name(curr));
4391 nvpair_t *next = nvlist_next_nvpair(zhp->zfs_props, curr);
4392
4393 /*
4394 * User properties will result in ZPROP_INVAL, and since we
4395 * only know how to prune standard ZFS properties, we always
4396 * leave these in the list. This can also happen if we
4397 * encounter an unknown DSL property (when running older
4398 * software, for example).
4399 */
4400 if (zfs_prop != ZPROP_INVAL && props[zfs_prop] == B_FALSE)
4401 (void) nvlist_remove(zhp->zfs_props,
4402 nvpair_name(curr), nvpair_type(curr));
4403 curr = next;
4404 }
4405 }
4406
4407 static int
4408 zfs_smb_acl_mgmt(libzfs_handle_t *hdl, char *dataset, char *path,
4409 zfs_smb_acl_op_t cmd, char *resource1, char *resource2)
4410 {
4411 zfs_cmd_t zc = { 0 };
4412 nvlist_t *nvlist = NULL;
4413 int error;
4414
4415 (void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name));
4416 (void) strlcpy(zc.zc_value, path, sizeof (zc.zc_value));
4417 zc.zc_cookie = (uint64_t)cmd;
4418
4419 if (cmd == ZFS_SMB_ACL_RENAME) {
4420 if (nvlist_alloc(&nvlist, NV_UNIQUE_NAME, 0) != 0) {
4421 (void) no_memory(hdl);
4422 return (0);
4423 }
4424 }
4425
4426 switch (cmd) {
4427 case ZFS_SMB_ACL_ADD:
4428 case ZFS_SMB_ACL_REMOVE:
4429 (void) strlcpy(zc.zc_string, resource1, sizeof (zc.zc_string));
4430 break;
4431 case ZFS_SMB_ACL_RENAME:
4432 if (nvlist_add_string(nvlist, ZFS_SMB_ACL_SRC,
4433 resource1) != 0) {
4434 (void) no_memory(hdl);
4435 return (-1);
4436 }
4437 if (nvlist_add_string(nvlist, ZFS_SMB_ACL_TARGET,
4438 resource2) != 0) {
4439 (void) no_memory(hdl);
4440 return (-1);
4441 }
4442 if (zcmd_write_src_nvlist(hdl, &zc, nvlist) != 0) {
4443 nvlist_free(nvlist);
4444 return (-1);
4445 }
4446 break;
4447 case ZFS_SMB_ACL_PURGE:
4448 break;
4449 default:
4450 return (-1);
4451 }
4452 error = ioctl(hdl->libzfs_fd, ZFS_IOC_SMB_ACL, &zc);
4453 nvlist_free(nvlist);
4454 return (error);
4455 }
4456
4457 int
4458 zfs_smb_acl_add(libzfs_handle_t *hdl, char *dataset,
4459 char *path, char *resource)
4460 {
4461 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_ADD,
4462 resource, NULL));
4463 }
4464
4465 int
4466 zfs_smb_acl_remove(libzfs_handle_t *hdl, char *dataset,
4467 char *path, char *resource)
4468 {
4469 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_REMOVE,
4470 resource, NULL));
4471 }
4472
4473 int
4474 zfs_smb_acl_purge(libzfs_handle_t *hdl, char *dataset, char *path)
4475 {
4476 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_PURGE,
4477 NULL, NULL));
4478 }
4479
4480 int
4481 zfs_smb_acl_rename(libzfs_handle_t *hdl, char *dataset, char *path,
4482 char *oldname, char *newname)
4483 {
4484 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_RENAME,
4485 oldname, newname));
4486 }
4487
4488 int
4489 zfs_userspace(zfs_handle_t *zhp, zfs_userquota_prop_t type,
4490 zfs_userspace_cb_t func, void *arg)
4491 {
4492 zfs_cmd_t zc = { 0 };
4493 zfs_useracct_t buf[100];
4494 libzfs_handle_t *hdl = zhp->zfs_hdl;
4495 int ret;
4496
4497 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
4498
4499 zc.zc_objset_type = type;
4500 zc.zc_nvlist_dst = (uintptr_t)buf;
4501
4502 for (;;) {
4503 zfs_useracct_t *zua = buf;
4504
4505 zc.zc_nvlist_dst_size = sizeof (buf);
4506 if (zfs_ioctl(hdl, ZFS_IOC_USERSPACE_MANY, &zc) != 0) {
4507 char errbuf[1024];
4508
4509 (void) snprintf(errbuf, sizeof (errbuf),
4510 dgettext(TEXT_DOMAIN,
4511 "cannot get used/quota for %s"), zc.zc_name);
4512 return (zfs_standard_error_fmt(hdl, errno, errbuf));
4513 }
4514 if (zc.zc_nvlist_dst_size == 0)
4515 break;
4516
4517 while (zc.zc_nvlist_dst_size > 0) {
4518 if ((ret = func(arg, zua->zu_domain, zua->zu_rid,
4519 zua->zu_space)) != 0)
4520 return (ret);
4521 zua++;
4522 zc.zc_nvlist_dst_size -= sizeof (zfs_useracct_t);
4523 }
4524 }
4525
4526 return (0);
4527 }
4528
4529 struct holdarg {
4530 nvlist_t *nvl;
4531 const char *snapname;
4532 const char *tag;
4533 boolean_t recursive;
4534 int error;
4535 };
4536
4537 static int
4538 zfs_hold_one(zfs_handle_t *zhp, void *arg)
4539 {
4540 struct holdarg *ha = arg;
4541 char name[ZFS_MAX_DATASET_NAME_LEN];
4542 int rv = 0;
4543
4544 (void) snprintf(name, sizeof (name),
4545 "%s@%s", zhp->zfs_name, ha->snapname);
4546
4547 if (lzc_exists(name))
4548 fnvlist_add_string(ha->nvl, name, ha->tag);
4549
4550 if (ha->recursive)
4551 rv = zfs_iter_filesystems(zhp, zfs_hold_one, ha);
4552 zfs_close(zhp);
4553 return (rv);
4554 }
4555
4556 int
4557 zfs_hold(zfs_handle_t *zhp, const char *snapname, const char *tag,
4558 boolean_t recursive, int cleanup_fd)
4559 {
4560 int ret;
4561 struct holdarg ha;
4562
4563 ha.nvl = fnvlist_alloc();
4564 ha.snapname = snapname;
4565 ha.tag = tag;
4566 ha.recursive = recursive;
4567 (void) zfs_hold_one(zfs_handle_dup(zhp), &ha);
4568
4569 if (nvlist_empty(ha.nvl)) {
4570 char errbuf[1024];
4571
4572 fnvlist_free(ha.nvl);
4573 ret = ENOENT;
4574 (void) snprintf(errbuf, sizeof (errbuf),
4575 dgettext(TEXT_DOMAIN,
4576 "cannot hold snapshot '%s@%s'"),
4577 zhp->zfs_name, snapname);
4578 (void) zfs_standard_error(zhp->zfs_hdl, ret, errbuf);
4579 return (ret);
4580 }
4581
4582 ret = zfs_hold_nvl(zhp, cleanup_fd, ha.nvl);
4583 fnvlist_free(ha.nvl);
4584
4585 return (ret);
4586 }
4587
4588 int
4589 zfs_hold_nvl(zfs_handle_t *zhp, int cleanup_fd, nvlist_t *holds)
4590 {
4591 int ret;
4592 nvlist_t *errors;
4593 libzfs_handle_t *hdl = zhp->zfs_hdl;
4594 char errbuf[1024];
4595 nvpair_t *elem;
4596
4597 errors = NULL;
4598 ret = lzc_hold(holds, cleanup_fd, &errors);
4599
4600 if (ret == 0) {
4601 /* There may be errors even in the success case. */
4602 fnvlist_free(errors);
4603 return (0);
4604 }
4605
4606 if (nvlist_empty(errors)) {
4607 /* no hold-specific errors */
4608 (void) snprintf(errbuf, sizeof (errbuf),
4609 dgettext(TEXT_DOMAIN, "cannot hold"));
4610 switch (ret) {
4611 case ENOTSUP:
4612 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4613 "pool must be upgraded"));
4614 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf);
4615 break;
4616 case EINVAL:
4617 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
4618 break;
4619 default:
4620 (void) zfs_standard_error(hdl, ret, errbuf);
4621 }
4622 }
4623
4624 for (elem = nvlist_next_nvpair(errors, NULL);
4625 elem != NULL;
4626 elem = nvlist_next_nvpair(errors, elem)) {
4627 (void) snprintf(errbuf, sizeof (errbuf),
4628 dgettext(TEXT_DOMAIN,
4629 "cannot hold snapshot '%s'"), nvpair_name(elem));
4630 switch (fnvpair_value_int32(elem)) {
4631 case E2BIG:
4632 /*
4633 * Temporary tags wind up having the ds object id
4634 * prepended. So even if we passed the length check
4635 * above, it's still possible for the tag to wind
4636 * up being slightly too long.
4637 */
4638 (void) zfs_error(hdl, EZFS_TAGTOOLONG, errbuf);
4639 break;
4640 case EINVAL:
4641 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
4642 break;
4643 case EEXIST:
4644 (void) zfs_error(hdl, EZFS_REFTAG_HOLD, errbuf);
4645 break;
4646 default:
4647 (void) zfs_standard_error(hdl,
4648 fnvpair_value_int32(elem), errbuf);
4649 }
4650 }
4651
4652 fnvlist_free(errors);
4653 return (ret);
4654 }
4655
4656 static int
4657 zfs_release_one(zfs_handle_t *zhp, void *arg)
4658 {
4659 struct holdarg *ha = arg;
4660 char name[ZFS_MAX_DATASET_NAME_LEN];
4661 int rv = 0;
4662 nvlist_t *existing_holds;
4663
4664 (void) snprintf(name, sizeof (name),
4665 "%s@%s", zhp->zfs_name, ha->snapname);
4666
4667 if (lzc_get_holds(name, &existing_holds) != 0) {
4668 ha->error = ENOENT;
4669 } else if (!nvlist_exists(existing_holds, ha->tag)) {
4670 ha->error = ESRCH;
4671 } else {
4672 nvlist_t *torelease = fnvlist_alloc();
4673 fnvlist_add_boolean(torelease, ha->tag);
4674 fnvlist_add_nvlist(ha->nvl, name, torelease);
4675 fnvlist_free(torelease);
4676 }
4677
4678 if (ha->recursive)
4679 rv = zfs_iter_filesystems(zhp, zfs_release_one, ha);
4680 zfs_close(zhp);
4681 return (rv);
4682 }
4683
4684 int
4685 zfs_release(zfs_handle_t *zhp, const char *snapname, const char *tag,
4686 boolean_t recursive)
4687 {
4688 int ret;
4689 struct holdarg ha;
4690 nvlist_t *errors = NULL;
4691 nvpair_t *elem;
4692 libzfs_handle_t *hdl = zhp->zfs_hdl;
4693 char errbuf[1024];
4694
4695 ha.nvl = fnvlist_alloc();
4696 ha.snapname = snapname;
4697 ha.tag = tag;
4698 ha.recursive = recursive;
4699 ha.error = 0;
4700 (void) zfs_release_one(zfs_handle_dup(zhp), &ha);
4701
4702 if (nvlist_empty(ha.nvl)) {
4703 fnvlist_free(ha.nvl);
4704 ret = ha.error;
4705 (void) snprintf(errbuf, sizeof (errbuf),
4706 dgettext(TEXT_DOMAIN,
4707 "cannot release hold from snapshot '%s@%s'"),
4708 zhp->zfs_name, snapname);
4709 if (ret == ESRCH) {
4710 (void) zfs_error(hdl, EZFS_REFTAG_RELE, errbuf);
4711 } else {
4712 (void) zfs_standard_error(hdl, ret, errbuf);
4713 }
4714 return (ret);
4715 }
4716
4717 ret = lzc_release(ha.nvl, &errors);
4718 fnvlist_free(ha.nvl);
4719
4720 if (ret == 0) {
4721 /* There may be errors even in the success case. */
4722 fnvlist_free(errors);
4723 return (0);
4724 }
4725
4726 if (nvlist_empty(errors)) {
4727 /* no hold-specific errors */
4728 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
4729 "cannot release"));
4730 switch (errno) {
4731 case ENOTSUP:
4732 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4733 "pool must be upgraded"));
4734 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf);
4735 break;
4736 default:
4737 (void) zfs_standard_error_fmt(hdl, errno, errbuf);
4738 }
4739 }
4740
4741 for (elem = nvlist_next_nvpair(errors, NULL);
4742 elem != NULL;
4743 elem = nvlist_next_nvpair(errors, elem)) {
4744 (void) snprintf(errbuf, sizeof (errbuf),
4745 dgettext(TEXT_DOMAIN,
4746 "cannot release hold from snapshot '%s'"),
4747 nvpair_name(elem));
4748 switch (fnvpair_value_int32(elem)) {
4749 case ESRCH:
4750 (void) zfs_error(hdl, EZFS_REFTAG_RELE, errbuf);
4751 break;
4752 case EINVAL:
4753 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
4754 break;
4755 default:
4756 (void) zfs_standard_error_fmt(hdl,
4757 fnvpair_value_int32(elem), errbuf);
4758 }
4759 }
4760
4761 fnvlist_free(errors);
4762 return (ret);
4763 }
4764
4765 int
4766 zfs_get_fsacl(zfs_handle_t *zhp, nvlist_t **nvl)
4767 {
4768 zfs_cmd_t zc = { 0 };
4769 libzfs_handle_t *hdl = zhp->zfs_hdl;
4770 int nvsz = 2048;
4771 void *nvbuf;
4772 int err = 0;
4773 char errbuf[1024];
4774
4775 assert(zhp->zfs_type == ZFS_TYPE_VOLUME ||
4776 zhp->zfs_type == ZFS_TYPE_FILESYSTEM);
4777
4778 tryagain:
4779
4780 nvbuf = malloc(nvsz);
4781 if (nvbuf == NULL) {
4782 err = (zfs_error(hdl, EZFS_NOMEM, strerror(errno)));
4783 goto out;
4784 }
4785
4786 zc.zc_nvlist_dst_size = nvsz;
4787 zc.zc_nvlist_dst = (uintptr_t)nvbuf;
4788
4789 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
4790
4791 if (ioctl(hdl->libzfs_fd, ZFS_IOC_GET_FSACL, &zc) != 0) {
4792 (void) snprintf(errbuf, sizeof (errbuf),
4793 dgettext(TEXT_DOMAIN, "cannot get permissions on '%s'"),
4794 zc.zc_name);
4795 switch (errno) {
4796 case ENOMEM:
4797 free(nvbuf);
4798 nvsz = zc.zc_nvlist_dst_size;
4799 goto tryagain;
4800
4801 case ENOTSUP:
4802 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4803 "pool must be upgraded"));
4804 err = zfs_error(hdl, EZFS_BADVERSION, errbuf);
4805 break;
4806 case EINVAL:
4807 err = zfs_error(hdl, EZFS_BADTYPE, errbuf);
4808 break;
4809 case ENOENT:
4810 err = zfs_error(hdl, EZFS_NOENT, errbuf);
4811 break;
4812 default:
4813 err = zfs_standard_error_fmt(hdl, errno, errbuf);
4814 break;
4815 }
4816 } else {
4817 /* success */
4818 int rc = nvlist_unpack(nvbuf, zc.zc_nvlist_dst_size, nvl, 0);
4819 if (rc) {
4820 (void) snprintf(errbuf, sizeof (errbuf), dgettext(
4821 TEXT_DOMAIN, "cannot get permissions on '%s'"),
4822 zc.zc_name);
4823 err = zfs_standard_error_fmt(hdl, rc, errbuf);
4824 }
4825 }
4826
4827 free(nvbuf);
4828 out:
4829 return (err);
4830 }
4831
4832 int
4833 zfs_set_fsacl(zfs_handle_t *zhp, boolean_t un, nvlist_t *nvl)
4834 {
4835 zfs_cmd_t zc = { 0 };
4836 libzfs_handle_t *hdl = zhp->zfs_hdl;
4837 char *nvbuf;
4838 char errbuf[1024];
4839 size_t nvsz;
4840 int err;
4841
4842 assert(zhp->zfs_type == ZFS_TYPE_VOLUME ||
4843 zhp->zfs_type == ZFS_TYPE_FILESYSTEM);
4844
4845 err = nvlist_size(nvl, &nvsz, NV_ENCODE_NATIVE);
4846 assert(err == 0);
4847
4848 nvbuf = malloc(nvsz);
4849
4850 err = nvlist_pack(nvl, &nvbuf, &nvsz, NV_ENCODE_NATIVE, 0);
4851 assert(err == 0);
4852
4853 zc.zc_nvlist_src_size = nvsz;
4854 zc.zc_nvlist_src = (uintptr_t)nvbuf;
4855 zc.zc_perm_action = un;
4856
4857 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
4858
4859 if (zfs_ioctl(hdl, ZFS_IOC_SET_FSACL, &zc) != 0) {
4860 (void) snprintf(errbuf, sizeof (errbuf),
4861 dgettext(TEXT_DOMAIN, "cannot set permissions on '%s'"),
4862 zc.zc_name);
4863 switch (errno) {
4864 case ENOTSUP:
4865 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4866 "pool must be upgraded"));
4867 err = zfs_error(hdl, EZFS_BADVERSION, errbuf);
4868 break;
4869 case EINVAL:
4870 err = zfs_error(hdl, EZFS_BADTYPE, errbuf);
4871 break;
4872 case ENOENT:
4873 err = zfs_error(hdl, EZFS_NOENT, errbuf);
4874 break;
4875 default:
4876 err = zfs_standard_error_fmt(hdl, errno, errbuf);
4877 break;
4878 }
4879 }
4880
4881 free(nvbuf);
4882
4883 return (err);
4884 }
4885
4886 int
4887 zfs_get_holds(zfs_handle_t *zhp, nvlist_t **nvl)
4888 {
4889 int err;
4890 char errbuf[1024];
4891
4892 err = lzc_get_holds(zhp->zfs_name, nvl);
4893
4894 if (err != 0) {
4895 libzfs_handle_t *hdl = zhp->zfs_hdl;
4896
4897 (void) snprintf(errbuf, sizeof (errbuf),
4898 dgettext(TEXT_DOMAIN, "cannot get holds for '%s'"),
4899 zhp->zfs_name);
4900 switch (err) {
4901 case ENOTSUP:
4902 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4903 "pool must be upgraded"));
4904 err = zfs_error(hdl, EZFS_BADVERSION, errbuf);
4905 break;
4906 case EINVAL:
4907 err = zfs_error(hdl, EZFS_BADTYPE, errbuf);
4908 break;
4909 case ENOENT:
4910 err = zfs_error(hdl, EZFS_NOENT, errbuf);
4911 break;
4912 default:
4913 err = zfs_standard_error_fmt(hdl, errno, errbuf);
4914 break;
4915 }
4916 }
4917
4918 return (err);
4919 }
4920
4921 /*
4922 * Convert the zvol's volume size to an appropriate reservation.
4923 * Note: If this routine is updated, it is necessary to update the ZFS test
4924 * suite's shell version in reservation.kshlib.
4925 */
4926 uint64_t
4927 zvol_volsize_to_reservation(uint64_t volsize, nvlist_t *props)
4928 {
4929 uint64_t numdb;
4930 uint64_t nblocks, volblocksize;
4931 int ncopies;
4932 char *strval;
4933
4934 if (nvlist_lookup_string(props,
4935 zfs_prop_to_name(ZFS_PROP_COPIES), &strval) == 0)
4936 ncopies = atoi(strval);
4937 else
4938 ncopies = 1;
4939 if (nvlist_lookup_uint64(props,
4940 zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
4941 &volblocksize) != 0)
4942 volblocksize = ZVOL_DEFAULT_BLOCKSIZE;
4943 nblocks = volsize/volblocksize;
4944 /* start with metadnode L0-L6 */
4945 numdb = 7;
4946 /* calculate number of indirects */
4947 while (nblocks > 1) {
4948 nblocks += DNODES_PER_LEVEL - 1;
4949 nblocks /= DNODES_PER_LEVEL;
4950 numdb += nblocks;
4951 }
4952 numdb *= MIN(SPA_DVAS_PER_BP, ncopies + 1);
4953 volsize *= ncopies;
4954 /*
4955 * this is exactly DN_MAX_INDBLKSHIFT when metadata isn't
4956 * compressed, but in practice they compress down to about
4957 * 1100 bytes
4958 */
4959 numdb *= 1ULL << DN_MAX_INDBLKSHIFT;
4960 volsize += numdb;
4961 return (volsize);
4962 }