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