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8322 nl: misleading-indentation
[unleashed/tickless.git] / usr / src / lib / libzfs / common / libzfs_dataset.c
blob52552047885ef4f5be44ad561123478cf972d8e7
1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Copyright (c) 2013, Joyent, Inc. All rights reserved.
25 * Copyright (c) 2011, 2016 by Delphix. All rights reserved.
26 * Copyright (c) 2012 DEY Storage Systems, Inc. All rights reserved.
27 * Copyright (c) 2011-2012 Pawel Jakub Dawidek. All rights reserved.
28 * Copyright (c) 2013 Martin Matuska. All rights reserved.
29 * Copyright (c) 2013 Steven Hartland. All rights reserved.
30 * Copyright (c) 2014 Integros [integros.com]
31 * Copyright 2016 Nexenta Systems, Inc.
32 * Copyright 2016 Igor Kozhukhov <ikozhukhov@gmail.com>
33 * Copyright 2017 RackTop Systems.
34 */
35
36 #include <ctype.h>
37 #include <errno.h>
38 #include <libintl.h>
39 #include <math.h>
40 #include <stdio.h>
41 #include <stdlib.h>
42 #include <strings.h>
43 #include <unistd.h>
44 #include <stddef.h>
45 #include <zone.h>
46 #include <fcntl.h>
47 #include <sys/mntent.h>
48 #include <sys/mount.h>
49 #include <priv.h>
50 #include <pwd.h>
51 #include <grp.h>
52 #include <stddef.h>
53 #include <ucred.h>
54 #include <idmap.h>
55 #include <aclutils.h>
56 #include <directory.h>
57
58 #include <sys/dnode.h>
59 #include <sys/spa.h>
60 #include <sys/zap.h>
61 #include <libzfs.h>
62
63 #include "zfs_namecheck.h"
64 #include "zfs_prop.h"
65 #include "libzfs_impl.h"
66 #include "zfs_deleg.h"
67
68 static int userquota_propname_decode(const char *propname, boolean_t zoned,
69 zfs_userquota_prop_t *typep, char *domain, int domainlen, uint64_t *ridp);
70
71 /*
72 * Given a single type (not a mask of types), return the type in a human
73 * readable form.
74 */
75 const char *
76 zfs_type_to_name(zfs_type_t type)
77 {
78 switch (type) {
79 case ZFS_TYPE_FILESYSTEM:
80 return (dgettext(TEXT_DOMAIN, "filesystem"));
81 case ZFS_TYPE_SNAPSHOT:
82 return (dgettext(TEXT_DOMAIN, "snapshot"));
83 case ZFS_TYPE_VOLUME:
84 return (dgettext(TEXT_DOMAIN, "volume"));
85 case ZFS_TYPE_POOL:
86 return (dgettext(TEXT_DOMAIN, "pool"));
87 case ZFS_TYPE_BOOKMARK:
88 return (dgettext(TEXT_DOMAIN, "bookmark"));
89 default:
90 assert(!"unhandled zfs_type_t");
91 }
92
93 return (NULL);
94 }
95
96 /*
97 * Validate a ZFS path. This is used even before trying to open the dataset, to
98 * provide a more meaningful error message. We call zfs_error_aux() to
99 * explain exactly why the name was not valid.
100 */
101 int
102 zfs_validate_name(libzfs_handle_t *hdl, const char *path, int type,
103 boolean_t modifying)
104 {
105 namecheck_err_t why;
106 char what;
107
108 (void) zfs_prop_get_table();
109 if (entity_namecheck(path, &why, &what) != 0) {
110 if (hdl != NULL) {
111 switch (why) {
112 case NAME_ERR_TOOLONG:
113 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
114 "name is too long"));
115 break;
116
117 case NAME_ERR_LEADING_SLASH:
118 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
119 "leading slash in name"));
120 break;
121
122 case NAME_ERR_EMPTY_COMPONENT:
123 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
124 "empty component in name"));
125 break;
126
127 case NAME_ERR_TRAILING_SLASH:
128 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
129 "trailing slash in name"));
130 break;
131
132 case NAME_ERR_INVALCHAR:
133 zfs_error_aux(hdl,
134 dgettext(TEXT_DOMAIN, "invalid character "
135 "'%c' in name"), what);
136 break;
137
138 case NAME_ERR_MULTIPLE_DELIMITERS:
139 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
140 "multiple '@' and/or '#' delimiters in "
141 "name"));
142 break;
143
144 case NAME_ERR_NOLETTER:
145 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
146 "pool doesn't begin with a letter"));
147 break;
148
149 case NAME_ERR_RESERVED:
150 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
151 "name is reserved"));
152 break;
153
154 case NAME_ERR_DISKLIKE:
155 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
156 "reserved disk name"));
157 break;
158
159 default:
160 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
161 "(%d) not defined"), why);
162 break;
163 }
164 }
165
166 return (0);
167 }
168
169 if (!(type & ZFS_TYPE_SNAPSHOT) && strchr(path, '@') != NULL) {
170 if (hdl != NULL)
171 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
172 "snapshot delimiter '@' is not expected here"));
173 return (0);
174 }
175
176 if (type == ZFS_TYPE_SNAPSHOT && strchr(path, '@') == NULL) {
177 if (hdl != NULL)
178 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
179 "missing '@' delimiter in snapshot name"));
180 return (0);
181 }
182
183 if (!(type & ZFS_TYPE_BOOKMARK) && strchr(path, '#') != NULL) {
184 if (hdl != NULL)
185 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
186 "bookmark delimiter '#' is not expected here"));
187 return (0);
188 }
189
190 if (type == ZFS_TYPE_BOOKMARK && strchr(path, '#') == NULL) {
191 if (hdl != NULL)
192 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
193 "missing '#' delimiter in bookmark name"));
194 return (0);
195 }
196
197 if (modifying && strchr(path, '%') != NULL) {
198 if (hdl != NULL)
199 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
200 "invalid character %c in name"), '%');
201 return (0);
202 }
203
204 return (-1);
205 }
206
207 int
208 zfs_name_valid(const char *name, zfs_type_t type)
209 {
210 if (type == ZFS_TYPE_POOL)
211 return (zpool_name_valid(NULL, B_FALSE, name));
212 return (zfs_validate_name(NULL, name, type, B_FALSE));
213 }
214
215 /*
216 * This function takes the raw DSL properties, and filters out the user-defined
217 * properties into a separate nvlist.
218 */
219 static nvlist_t *
220 process_user_props(zfs_handle_t *zhp, nvlist_t *props)
221 {
222 libzfs_handle_t *hdl = zhp->zfs_hdl;
223 nvpair_t *elem;
224 nvlist_t *propval;
225 nvlist_t *nvl;
226
227 if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0) {
228 (void) no_memory(hdl);
229 return (NULL);
230 }
231
232 elem = NULL;
233 while ((elem = nvlist_next_nvpair(props, elem)) != NULL) {
234 if (!zfs_prop_user(nvpair_name(elem)))
235 continue;
236
237 verify(nvpair_value_nvlist(elem, &propval) == 0);
238 if (nvlist_add_nvlist(nvl, nvpair_name(elem), propval) != 0) {
239 nvlist_free(nvl);
240 (void) no_memory(hdl);
241 return (NULL);
242 }
243 }
244
245 return (nvl);
246 }
247
248 static zpool_handle_t *
249 zpool_add_handle(zfs_handle_t *zhp, const char *pool_name)
250 {
251 libzfs_handle_t *hdl = zhp->zfs_hdl;
252 zpool_handle_t *zph;
253
254 if ((zph = zpool_open_canfail(hdl, pool_name)) != NULL) {
255 if (hdl->libzfs_pool_handles != NULL)
256 zph->zpool_next = hdl->libzfs_pool_handles;
257 hdl->libzfs_pool_handles = zph;
258 }
259 return (zph);
260 }
261
262 static zpool_handle_t *
263 zpool_find_handle(zfs_handle_t *zhp, const char *pool_name, int len)
264 {
265 libzfs_handle_t *hdl = zhp->zfs_hdl;
266 zpool_handle_t *zph = hdl->libzfs_pool_handles;
267
268 while ((zph != NULL) &&
269 (strncmp(pool_name, zpool_get_name(zph), len) != 0))
270 zph = zph->zpool_next;
271 return (zph);
272 }
273
274 /*
275 * Returns a handle to the pool that contains the provided dataset.
276 * If a handle to that pool already exists then that handle is returned.
277 * Otherwise, a new handle is created and added to the list of handles.
278 */
279 static zpool_handle_t *
280 zpool_handle(zfs_handle_t *zhp)
281 {
282 char *pool_name;
283 int len;
284 zpool_handle_t *zph;
285
286 len = strcspn(zhp->zfs_name, "/@#") + 1;
287 pool_name = zfs_alloc(zhp->zfs_hdl, len);
288 (void) strlcpy(pool_name, zhp->zfs_name, len);
289
290 zph = zpool_find_handle(zhp, pool_name, len);
291 if (zph == NULL)
292 zph = zpool_add_handle(zhp, pool_name);
293
294 free(pool_name);
295 return (zph);
296 }
297
298 void
299 zpool_free_handles(libzfs_handle_t *hdl)
300 {
301 zpool_handle_t *next, *zph = hdl->libzfs_pool_handles;
302
303 while (zph != NULL) {
304 next = zph->zpool_next;
305 zpool_close(zph);
306 zph = next;
307 }
308 hdl->libzfs_pool_handles = NULL;
309 }
310
311 /*
312 * Utility function to gather stats (objset and zpl) for the given object.
313 */
314 static int
315 get_stats_ioctl(zfs_handle_t *zhp, zfs_cmd_t *zc)
316 {
317 libzfs_handle_t *hdl = zhp->zfs_hdl;
318
319 (void) strlcpy(zc->zc_name, zhp->zfs_name, sizeof (zc->zc_name));
320
321 while (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_STATS, zc) != 0) {
322 if (errno == ENOMEM) {
323 if (zcmd_expand_dst_nvlist(hdl, zc) != 0) {
324 return (-1);
325 }
326 } else {
327 return (-1);
328 }
329 }
330 return (0);
331 }
332
333 /*
334 * Utility function to get the received properties of the given object.
335 */
336 static int
337 get_recvd_props_ioctl(zfs_handle_t *zhp)
338 {
339 libzfs_handle_t *hdl = zhp->zfs_hdl;
340 nvlist_t *recvdprops;
341 zfs_cmd_t zc = { 0 };
342 int err;
343
344 if (zcmd_alloc_dst_nvlist(hdl, &zc, 0) != 0)
345 return (-1);
346
347 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
348
349 while (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_RECVD_PROPS, &zc) != 0) {
350 if (errno == ENOMEM) {
351 if (zcmd_expand_dst_nvlist(hdl, &zc) != 0) {
352 return (-1);
353 }
354 } else {
355 zcmd_free_nvlists(&zc);
356 return (-1);
357 }
358 }
359
360 err = zcmd_read_dst_nvlist(zhp->zfs_hdl, &zc, &recvdprops);
361 zcmd_free_nvlists(&zc);
362 if (err != 0)
363 return (-1);
364
365 nvlist_free(zhp->zfs_recvd_props);
366 zhp->zfs_recvd_props = recvdprops;
367
368 return (0);
369 }
370
371 static int
372 put_stats_zhdl(zfs_handle_t *zhp, zfs_cmd_t *zc)
373 {
374 nvlist_t *allprops, *userprops;
375
376 zhp->zfs_dmustats = zc->zc_objset_stats; /* structure assignment */
377
378 if (zcmd_read_dst_nvlist(zhp->zfs_hdl, zc, &allprops) != 0) {
379 return (-1);
380 }
381
382 /*
383 * XXX Why do we store the user props separately, in addition to
384 * storing them in zfs_props?
385 */
386 if ((userprops = process_user_props(zhp, allprops)) == NULL) {
387 nvlist_free(allprops);
388 return (-1);
389 }
390
391 nvlist_free(zhp->zfs_props);
392 nvlist_free(zhp->zfs_user_props);
393
394 zhp->zfs_props = allprops;
395 zhp->zfs_user_props = userprops;
396
397 return (0);
398 }
399
400 static int
401 get_stats(zfs_handle_t *zhp)
402 {
403 int rc = 0;
404 zfs_cmd_t zc = { 0 };
405
406 if (zcmd_alloc_dst_nvlist(zhp->zfs_hdl, &zc, 0) != 0)
407 return (-1);
408 if (get_stats_ioctl(zhp, &zc) != 0)
409 rc = -1;
410 else if (put_stats_zhdl(zhp, &zc) != 0)
411 rc = -1;
412 zcmd_free_nvlists(&zc);
413 return (rc);
414 }
415
416 /*
417 * Refresh the properties currently stored in the handle.
418 */
419 void
420 zfs_refresh_properties(zfs_handle_t *zhp)
421 {
422 (void) get_stats(zhp);
423 }
424
425 /*
426 * Makes a handle from the given dataset name. Used by zfs_open() and
427 * zfs_iter_* to create child handles on the fly.
428 */
429 static int
430 make_dataset_handle_common(zfs_handle_t *zhp, zfs_cmd_t *zc)
431 {
432 if (put_stats_zhdl(zhp, zc) != 0)
433 return (-1);
434
435 /*
436 * We've managed to open the dataset and gather statistics. Determine
437 * the high-level type.
438 */
439 if (zhp->zfs_dmustats.dds_type == DMU_OST_ZVOL)
440 zhp->zfs_head_type = ZFS_TYPE_VOLUME;
441 else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZFS)
442 zhp->zfs_head_type = ZFS_TYPE_FILESYSTEM;
443 else
444 abort();
445
446 if (zhp->zfs_dmustats.dds_is_snapshot)
447 zhp->zfs_type = ZFS_TYPE_SNAPSHOT;
448 else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZVOL)
449 zhp->zfs_type = ZFS_TYPE_VOLUME;
450 else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZFS)
451 zhp->zfs_type = ZFS_TYPE_FILESYSTEM;
452 else
453 abort(); /* we should never see any other types */
454
455 if ((zhp->zpool_hdl = zpool_handle(zhp)) == NULL)
456 return (-1);
457
458 return (0);
459 }
460
461 zfs_handle_t *
462 make_dataset_handle(libzfs_handle_t *hdl, const char *path)
463 {
464 zfs_cmd_t zc = { 0 };
465
466 zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1);
467
468 if (zhp == NULL)
469 return (NULL);
470
471 zhp->zfs_hdl = hdl;
472 (void) strlcpy(zhp->zfs_name, path, sizeof (zhp->zfs_name));
473 if (zcmd_alloc_dst_nvlist(hdl, &zc, 0) != 0) {
474 free(zhp);
475 return (NULL);
476 }
477 if (get_stats_ioctl(zhp, &zc) == -1) {
478 zcmd_free_nvlists(&zc);
479 free(zhp);
480 return (NULL);
481 }
482 if (make_dataset_handle_common(zhp, &zc) == -1) {
483 free(zhp);
484 zhp = NULL;
485 }
486 zcmd_free_nvlists(&zc);
487 return (zhp);
488 }
489
490 zfs_handle_t *
491 make_dataset_handle_zc(libzfs_handle_t *hdl, zfs_cmd_t *zc)
492 {
493 zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1);
494
495 if (zhp == NULL)
496 return (NULL);
497
498 zhp->zfs_hdl = hdl;
499 (void) strlcpy(zhp->zfs_name, zc->zc_name, sizeof (zhp->zfs_name));
500 if (make_dataset_handle_common(zhp, zc) == -1) {
501 free(zhp);
502 return (NULL);
503 }
504 return (zhp);
505 }
506
507 zfs_handle_t *
508 make_dataset_simple_handle_zc(zfs_handle_t *pzhp, zfs_cmd_t *zc)
509 {
510 zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1);
511
512 if (zhp == NULL)
513 return (NULL);
514
515 zhp->zfs_hdl = pzhp->zfs_hdl;
516 (void) strlcpy(zhp->zfs_name, zc->zc_name, sizeof (zhp->zfs_name));
517 zhp->zfs_head_type = pzhp->zfs_type;
518 zhp->zfs_type = ZFS_TYPE_SNAPSHOT;
519 zhp->zpool_hdl = zpool_handle(zhp);
520 return (zhp);
521 }
522
523 zfs_handle_t *
524 zfs_handle_dup(zfs_handle_t *zhp_orig)
525 {
526 zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1);
527
528 if (zhp == NULL)
529 return (NULL);
530
531 zhp->zfs_hdl = zhp_orig->zfs_hdl;
532 zhp->zpool_hdl = zhp_orig->zpool_hdl;
533 (void) strlcpy(zhp->zfs_name, zhp_orig->zfs_name,
534 sizeof (zhp->zfs_name));
535 zhp->zfs_type = zhp_orig->zfs_type;
536 zhp->zfs_head_type = zhp_orig->zfs_head_type;
537 zhp->zfs_dmustats = zhp_orig->zfs_dmustats;
538 if (zhp_orig->zfs_props != NULL) {
539 if (nvlist_dup(zhp_orig->zfs_props, &zhp->zfs_props, 0) != 0) {
540 (void) no_memory(zhp->zfs_hdl);
541 zfs_close(zhp);
542 return (NULL);
543 }
544 }
545 if (zhp_orig->zfs_user_props != NULL) {
546 if (nvlist_dup(zhp_orig->zfs_user_props,
547 &zhp->zfs_user_props, 0) != 0) {
548 (void) no_memory(zhp->zfs_hdl);
549 zfs_close(zhp);
550 return (NULL);
551 }
552 }
553 if (zhp_orig->zfs_recvd_props != NULL) {
554 if (nvlist_dup(zhp_orig->zfs_recvd_props,
555 &zhp->zfs_recvd_props, 0)) {
556 (void) no_memory(zhp->zfs_hdl);
557 zfs_close(zhp);
558 return (NULL);
559 }
560 }
561 zhp->zfs_mntcheck = zhp_orig->zfs_mntcheck;
562 if (zhp_orig->zfs_mntopts != NULL) {
563 zhp->zfs_mntopts = zfs_strdup(zhp_orig->zfs_hdl,
564 zhp_orig->zfs_mntopts);
565 }
566 zhp->zfs_props_table = zhp_orig->zfs_props_table;
567 return (zhp);
568 }
569
570 boolean_t
571 zfs_bookmark_exists(const char *path)
572 {
573 nvlist_t *bmarks;
574 nvlist_t *props;
575 char fsname[ZFS_MAX_DATASET_NAME_LEN];
576 char *bmark_name;
577 char *pound;
578 int err;
579 boolean_t rv;
580
581
582 (void) strlcpy(fsname, path, sizeof (fsname));
583 pound = strchr(fsname, '#');
584 if (pound == NULL)
585 return (B_FALSE);
586
587 *pound = '\0';
588 bmark_name = pound + 1;
589 props = fnvlist_alloc();
590 err = lzc_get_bookmarks(fsname, props, &bmarks);
591 nvlist_free(props);
592 if (err != 0) {
593 nvlist_free(bmarks);
594 return (B_FALSE);
595 }
596
597 rv = nvlist_exists(bmarks, bmark_name);
598 nvlist_free(bmarks);
599 return (rv);
600 }
601
602 zfs_handle_t *
603 make_bookmark_handle(zfs_handle_t *parent, const char *path,
604 nvlist_t *bmark_props)
605 {
606 zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1);
607
608 if (zhp == NULL)
609 return (NULL);
610
611 /* Fill in the name. */
612 zhp->zfs_hdl = parent->zfs_hdl;
613 (void) strlcpy(zhp->zfs_name, path, sizeof (zhp->zfs_name));
614
615 /* Set the property lists. */
616 if (nvlist_dup(bmark_props, &zhp->zfs_props, 0) != 0) {
617 free(zhp);
618 return (NULL);
619 }
620
621 /* Set the types. */
622 zhp->zfs_head_type = parent->zfs_head_type;
623 zhp->zfs_type = ZFS_TYPE_BOOKMARK;
624
625 if ((zhp->zpool_hdl = zpool_handle(zhp)) == NULL) {
626 nvlist_free(zhp->zfs_props);
627 free(zhp);
628 return (NULL);
629 }
630
631 return (zhp);
632 }
633
634 struct zfs_open_bookmarks_cb_data {
635 const char *path;
636 zfs_handle_t *zhp;
637 };
638
639 static int
640 zfs_open_bookmarks_cb(zfs_handle_t *zhp, void *data)
641 {
642 struct zfs_open_bookmarks_cb_data *dp = data;
643
644 /*
645 * Is it the one we are looking for?
646 */
647 if (strcmp(dp->path, zfs_get_name(zhp)) == 0) {
648 /*
649 * We found it. Save it and let the caller know we are done.
650 */
651 dp->zhp = zhp;
652 return (EEXIST);
653 }
654
655 /*
656 * Not found. Close the handle and ask for another one.
657 */
658 zfs_close(zhp);
659 return (0);
660 }
661
662 /*
663 * Opens the given snapshot, bookmark, filesystem, or volume. The 'types'
664 * argument is a mask of acceptable types. The function will print an
665 * appropriate error message and return NULL if it can't be opened.
666 */
667 zfs_handle_t *
668 zfs_open(libzfs_handle_t *hdl, const char *path, int types)
669 {
670 zfs_handle_t *zhp;
671 char errbuf[1024];
672 char *bookp;
673
674 (void) snprintf(errbuf, sizeof (errbuf),
675 dgettext(TEXT_DOMAIN, "cannot open '%s'"), path);
676
677 /*
678 * Validate the name before we even try to open it.
679 */
680 if (!zfs_validate_name(hdl, path, types, B_FALSE)) {
681 (void) zfs_error(hdl, EZFS_INVALIDNAME, errbuf);
682 return (NULL);
683 }
684
685 /*
686 * Bookmarks needs to be handled separately.
687 */
688 bookp = strchr(path, '#');
689 if (bookp == NULL) {
690 /*
691 * Try to get stats for the dataset, which will tell us if it
692 * exists.
693 */
694 errno = 0;
695 if ((zhp = make_dataset_handle(hdl, path)) == NULL) {
696 (void) zfs_standard_error(hdl, errno, errbuf);
697 return (NULL);
698 }
699 } else {
700 char dsname[ZFS_MAX_DATASET_NAME_LEN];
701 zfs_handle_t *pzhp;
702 struct zfs_open_bookmarks_cb_data cb_data = {path, NULL};
703
704 /*
705 * We need to cut out '#' and everything after '#'
706 * to get the parent dataset name only.
707 */
708 assert(bookp - path < sizeof (dsname));
709 (void) strncpy(dsname, path, bookp - path);
710 dsname[bookp - path] = '\0';
711
712 /*
713 * Create handle for the parent dataset.
714 */
715 errno = 0;
716 if ((pzhp = make_dataset_handle(hdl, dsname)) == NULL) {
717 (void) zfs_standard_error(hdl, errno, errbuf);
718 return (NULL);
719 }
720
721 /*
722 * Iterate bookmarks to find the right one.
723 */
724 errno = 0;
725 if ((zfs_iter_bookmarks(pzhp, zfs_open_bookmarks_cb,
726 &cb_data) == 0) && (cb_data.zhp == NULL)) {
727 (void) zfs_error(hdl, EZFS_NOENT, errbuf);
728 zfs_close(pzhp);
729 return (NULL);
730 }
731 if (cb_data.zhp == NULL) {
732 (void) zfs_standard_error(hdl, errno, errbuf);
733 zfs_close(pzhp);
734 return (NULL);
735 }
736 zhp = cb_data.zhp;
737
738 /*
739 * Cleanup.
740 */
741 zfs_close(pzhp);
742 }
743
744 if (!(types & zhp->zfs_type)) {
745 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
746 zfs_close(zhp);
747 return (NULL);
748 }
749
750 return (zhp);
751 }
752
753 /*
754 * Release a ZFS handle. Nothing to do but free the associated memory.
755 */
756 void
757 zfs_close(zfs_handle_t *zhp)
758 {
759 if (zhp->zfs_mntopts)
760 free(zhp->zfs_mntopts);
761 nvlist_free(zhp->zfs_props);
762 nvlist_free(zhp->zfs_user_props);
763 nvlist_free(zhp->zfs_recvd_props);
764 free(zhp);
765 }
766
767 typedef struct mnttab_node {
768 struct mnttab mtn_mt;
769 avl_node_t mtn_node;
770 } mnttab_node_t;
771
772 static int
773 libzfs_mnttab_cache_compare(const void *arg1, const void *arg2)
774 {
775 const mnttab_node_t *mtn1 = arg1;
776 const mnttab_node_t *mtn2 = arg2;
777 int rv;
778
779 rv = strcmp(mtn1->mtn_mt.mnt_special, mtn2->mtn_mt.mnt_special);
780
781 if (rv == 0)
782 return (0);
783 return (rv > 0 ? 1 : -1);
784 }
785
786 void
787 libzfs_mnttab_init(libzfs_handle_t *hdl)
788 {
789 assert(avl_numnodes(&hdl->libzfs_mnttab_cache) == 0);
790 avl_create(&hdl->libzfs_mnttab_cache, libzfs_mnttab_cache_compare,
791 sizeof (mnttab_node_t), offsetof(mnttab_node_t, mtn_node));
792 }
793
794 void
795 libzfs_mnttab_update(libzfs_handle_t *hdl)
796 {
797 struct mnttab entry;
798
799 rewind(hdl->libzfs_mnttab);
800 while (getmntent(hdl->libzfs_mnttab, &entry) == 0) {
801 mnttab_node_t *mtn;
802
803 if (strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0)
804 continue;
805 mtn = zfs_alloc(hdl, sizeof (mnttab_node_t));
806 mtn->mtn_mt.mnt_special = zfs_strdup(hdl, entry.mnt_special);
807 mtn->mtn_mt.mnt_mountp = zfs_strdup(hdl, entry.mnt_mountp);
808 mtn->mtn_mt.mnt_fstype = zfs_strdup(hdl, entry.mnt_fstype);
809 mtn->mtn_mt.mnt_mntopts = zfs_strdup(hdl, entry.mnt_mntopts);
810 avl_add(&hdl->libzfs_mnttab_cache, mtn);
811 }
812 }
813
814 void
815 libzfs_mnttab_fini(libzfs_handle_t *hdl)
816 {
817 void *cookie = NULL;
818 mnttab_node_t *mtn;
819
820 while ((mtn = avl_destroy_nodes(&hdl->libzfs_mnttab_cache, &cookie))
821 != NULL) {
822 free(mtn->mtn_mt.mnt_special);
823 free(mtn->mtn_mt.mnt_mountp);
824 free(mtn->mtn_mt.mnt_fstype);
825 free(mtn->mtn_mt.mnt_mntopts);
826 free(mtn);
827 }
828 avl_destroy(&hdl->libzfs_mnttab_cache);
829 }
830
831 void
832 libzfs_mnttab_cache(libzfs_handle_t *hdl, boolean_t enable)
833 {
834 hdl->libzfs_mnttab_enable = enable;
835 }
836
837 int
838 libzfs_mnttab_find(libzfs_handle_t *hdl, const char *fsname,
839 struct mnttab *entry)
840 {
841 mnttab_node_t find;
842 mnttab_node_t *mtn;
843
844 if (!hdl->libzfs_mnttab_enable) {
845 struct mnttab srch = { 0 };
846
847 if (avl_numnodes(&hdl->libzfs_mnttab_cache))
848 libzfs_mnttab_fini(hdl);
849 rewind(hdl->libzfs_mnttab);
850 srch.mnt_special = (char *)fsname;
851 srch.mnt_fstype = MNTTYPE_ZFS;
852 if (getmntany(hdl->libzfs_mnttab, entry, &srch) == 0)
853 return (0);
854 else
855 return (ENOENT);
856 }
857
858 if (avl_numnodes(&hdl->libzfs_mnttab_cache) == 0)
859 libzfs_mnttab_update(hdl);
860
861 find.mtn_mt.mnt_special = (char *)fsname;
862 mtn = avl_find(&hdl->libzfs_mnttab_cache, &find, NULL);
863 if (mtn) {
864 *entry = mtn->mtn_mt;
865 return (0);
866 }
867 return (ENOENT);
868 }
869
870 void
871 libzfs_mnttab_add(libzfs_handle_t *hdl, const char *special,
872 const char *mountp, const char *mntopts)
873 {
874 mnttab_node_t *mtn;
875
876 if (avl_numnodes(&hdl->libzfs_mnttab_cache) == 0)
877 return;
878 mtn = zfs_alloc(hdl, sizeof (mnttab_node_t));
879 mtn->mtn_mt.mnt_special = zfs_strdup(hdl, special);
880 mtn->mtn_mt.mnt_mountp = zfs_strdup(hdl, mountp);
881 mtn->mtn_mt.mnt_fstype = zfs_strdup(hdl, MNTTYPE_ZFS);
882 mtn->mtn_mt.mnt_mntopts = zfs_strdup(hdl, mntopts);
883 avl_add(&hdl->libzfs_mnttab_cache, mtn);
884 }
885
886 void
887 libzfs_mnttab_remove(libzfs_handle_t *hdl, const char *fsname)
888 {
889 mnttab_node_t find;
890 mnttab_node_t *ret;
891
892 find.mtn_mt.mnt_special = (char *)fsname;
893 if ((ret = avl_find(&hdl->libzfs_mnttab_cache, (void *)&find, NULL))
894 != NULL) {
895 avl_remove(&hdl->libzfs_mnttab_cache, ret);
896 free(ret->mtn_mt.mnt_special);
897 free(ret->mtn_mt.mnt_mountp);
898 free(ret->mtn_mt.mnt_fstype);
899 free(ret->mtn_mt.mnt_mntopts);
900 free(ret);
901 }
902 }
903
904 int
905 zfs_spa_version(zfs_handle_t *zhp, int *spa_version)
906 {
907 zpool_handle_t *zpool_handle = zhp->zpool_hdl;
908
909 if (zpool_handle == NULL)
910 return (-1);
911
912 *spa_version = zpool_get_prop_int(zpool_handle,
913 ZPOOL_PROP_VERSION, NULL);
914 return (0);
915 }
916
917 /*
918 * The choice of reservation property depends on the SPA version.
919 */
920 static int
921 zfs_which_resv_prop(zfs_handle_t *zhp, zfs_prop_t *resv_prop)
922 {
923 int spa_version;
924
925 if (zfs_spa_version(zhp, &spa_version) < 0)
926 return (-1);
927
928 if (spa_version >= SPA_VERSION_REFRESERVATION)
929 *resv_prop = ZFS_PROP_REFRESERVATION;
930 else
931 *resv_prop = ZFS_PROP_RESERVATION;
932
933 return (0);
934 }
935
936 /*
937 * Given an nvlist of properties to set, validates that they are correct, and
938 * parses any numeric properties (index, boolean, etc) if they are specified as
939 * strings.
940 */
941 nvlist_t *
942 zfs_valid_proplist(libzfs_handle_t *hdl, zfs_type_t type, nvlist_t *nvl,
943 uint64_t zoned, zfs_handle_t *zhp, zpool_handle_t *zpool_hdl,
944 const char *errbuf)
945 {
946 nvpair_t *elem;
947 uint64_t intval;
948 char *strval;
949 zfs_prop_t prop;
950 nvlist_t *ret;
951 int chosen_normal = -1;
952 int chosen_utf = -1;
953
954 if (nvlist_alloc(&ret, NV_UNIQUE_NAME, 0) != 0) {
955 (void) no_memory(hdl);
956 return (NULL);
957 }
958
959 /*
960 * Make sure this property is valid and applies to this type.
961 */
962
963 elem = NULL;
964 while ((elem = nvlist_next_nvpair(nvl, elem)) != NULL) {
965 const char *propname = nvpair_name(elem);
966
967 prop = zfs_name_to_prop(propname);
968 if (prop == ZPROP_INVAL && zfs_prop_user(propname)) {
969 /*
970 * This is a user property: make sure it's a
971 * string, and that it's less than ZAP_MAXNAMELEN.
972 */
973 if (nvpair_type(elem) != DATA_TYPE_STRING) {
974 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
975 "'%s' must be a string"), propname);
976 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
977 goto error;
978 }
979
980 if (strlen(nvpair_name(elem)) >= ZAP_MAXNAMELEN) {
981 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
982 "property name '%s' is too long"),
983 propname);
984 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
985 goto error;
986 }
987
988 (void) nvpair_value_string(elem, &strval);
989 if (nvlist_add_string(ret, propname, strval) != 0) {
990 (void) no_memory(hdl);
991 goto error;
992 }
993 continue;
994 }
995
996 /*
997 * Currently, only user properties can be modified on
998 * snapshots.
999 */
1000 if (type == ZFS_TYPE_SNAPSHOT) {
1001 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1002 "this property can not be modified for snapshots"));
1003 (void) zfs_error(hdl, EZFS_PROPTYPE, errbuf);
1004 goto error;
1005 }
1006
1007 if (prop == ZPROP_INVAL && zfs_prop_userquota(propname)) {
1008 zfs_userquota_prop_t uqtype;
1009 char newpropname[128];
1010 char domain[128];
1011 uint64_t rid;
1012 uint64_t valary[3];
1013
1014 if (userquota_propname_decode(propname, zoned,
1015 &uqtype, domain, sizeof (domain), &rid) != 0) {
1016 zfs_error_aux(hdl,
1017 dgettext(TEXT_DOMAIN,
1018 "'%s' has an invalid user/group name"),
1019 propname);
1020 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1021 goto error;
1022 }
1023
1024 if (uqtype != ZFS_PROP_USERQUOTA &&
1025 uqtype != ZFS_PROP_GROUPQUOTA) {
1026 zfs_error_aux(hdl,
1027 dgettext(TEXT_DOMAIN, "'%s' is readonly"),
1028 propname);
1029 (void) zfs_error(hdl, EZFS_PROPREADONLY,
1030 errbuf);
1031 goto error;
1032 }
1033
1034 if (nvpair_type(elem) == DATA_TYPE_STRING) {
1035 (void) nvpair_value_string(elem, &strval);
1036 if (strcmp(strval, "none") == 0) {
1037 intval = 0;
1038 } else if (zfs_nicestrtonum(hdl,
1039 strval, &intval) != 0) {
1040 (void) zfs_error(hdl,
1041 EZFS_BADPROP, errbuf);
1042 goto error;
1043 }
1044 } else if (nvpair_type(elem) ==
1045 DATA_TYPE_UINT64) {
1046 (void) nvpair_value_uint64(elem, &intval);
1047 if (intval == 0) {
1048 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1049 "use 'none' to disable "
1050 "userquota/groupquota"));
1051 goto error;
1052 }
1053 } else {
1054 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1055 "'%s' must be a number"), propname);
1056 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1057 goto error;
1058 }
1059
1060 /*
1061 * Encode the prop name as
1062 * userquota@<hex-rid>-domain, to make it easy
1063 * for the kernel to decode.
1064 */
1065 (void) snprintf(newpropname, sizeof (newpropname),
1066 "%s%llx-%s", zfs_userquota_prop_prefixes[uqtype],
1067 (longlong_t)rid, domain);
1068 valary[0] = uqtype;
1069 valary[1] = rid;
1070 valary[2] = intval;
1071 if (nvlist_add_uint64_array(ret, newpropname,
1072 valary, 3) != 0) {
1073 (void) no_memory(hdl);
1074 goto error;
1075 }
1076 continue;
1077 } else if (prop == ZPROP_INVAL && zfs_prop_written(propname)) {
1078 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1079 "'%s' is readonly"),
1080 propname);
1081 (void) zfs_error(hdl, EZFS_PROPREADONLY, errbuf);
1082 goto error;
1083 }
1084
1085 if (prop == ZPROP_INVAL) {
1086 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1087 "invalid property '%s'"), propname);
1088 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1089 goto error;
1090 }
1091
1092 if (!zfs_prop_valid_for_type(prop, type)) {
1093 zfs_error_aux(hdl,
1094 dgettext(TEXT_DOMAIN, "'%s' does not "
1095 "apply to datasets of this type"), propname);
1096 (void) zfs_error(hdl, EZFS_PROPTYPE, errbuf);
1097 goto error;
1098 }
1099
1100 if (zfs_prop_readonly(prop) &&
1101 (!zfs_prop_setonce(prop) || zhp != NULL)) {
1102 zfs_error_aux(hdl,
1103 dgettext(TEXT_DOMAIN, "'%s' is readonly"),
1104 propname);
1105 (void) zfs_error(hdl, EZFS_PROPREADONLY, errbuf);
1106 goto error;
1107 }
1108
1109 if (zprop_parse_value(hdl, elem, prop, type, ret,
1110 &strval, &intval, errbuf) != 0)
1111 goto error;
1112
1113 /*
1114 * Perform some additional checks for specific properties.
1115 */
1116 switch (prop) {
1117 case ZFS_PROP_VERSION:
1118 {
1119 int version;
1120
1121 if (zhp == NULL)
1122 break;
1123 version = zfs_prop_get_int(zhp, ZFS_PROP_VERSION);
1124 if (intval < version) {
1125 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1126 "Can not downgrade; already at version %u"),
1127 version);
1128 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1129 goto error;
1130 }
1131 break;
1132 }
1133
1134 case ZFS_PROP_VOLBLOCKSIZE:
1135 case ZFS_PROP_RECORDSIZE:
1136 {
1137 int maxbs = SPA_MAXBLOCKSIZE;
1138 if (zpool_hdl != NULL) {
1139 maxbs = zpool_get_prop_int(zpool_hdl,
1140 ZPOOL_PROP_MAXBLOCKSIZE, NULL);
1141 }
1142 /*
1143 * Volumes are limited to a volblocksize of 128KB,
1144 * because they typically service workloads with
1145 * small random writes, which incur a large performance
1146 * penalty with large blocks.
1147 */
1148 if (prop == ZFS_PROP_VOLBLOCKSIZE)
1149 maxbs = SPA_OLD_MAXBLOCKSIZE;
1150 /*
1151 * The value must be a power of two between
1152 * SPA_MINBLOCKSIZE and maxbs.
1153 */
1154 if (intval < SPA_MINBLOCKSIZE ||
1155 intval > maxbs || !ISP2(intval)) {
1156 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1157 "'%s' must be power of 2 from 512B "
1158 "to %uKB"), propname, maxbs >> 10);
1159 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1160 goto error;
1161 }
1162 break;
1163 }
1164 case ZFS_PROP_MLSLABEL:
1165 {
1166 /*
1167 * Verify the mlslabel string and convert to
1168 * internal hex label string.
1169 */
1170
1171 m_label_t *new_sl;
1172 char *hex = NULL; /* internal label string */
1173
1174 /* Default value is already OK. */
1175 if (strcasecmp(strval, ZFS_MLSLABEL_DEFAULT) == 0)
1176 break;
1177
1178 /* Verify the label can be converted to binary form */
1179 if (((new_sl = m_label_alloc(MAC_LABEL)) == NULL) ||
1180 (str_to_label(strval, &new_sl, MAC_LABEL,
1181 L_NO_CORRECTION, NULL) == -1)) {
1182 goto badlabel;
1183 }
1184
1185 /* Now translate to hex internal label string */
1186 if (label_to_str(new_sl, &hex, M_INTERNAL,
1187 DEF_NAMES) != 0) {
1188 if (hex)
1189 free(hex);
1190 goto badlabel;
1191 }
1192 m_label_free(new_sl);
1193
1194 /* If string is already in internal form, we're done. */
1195 if (strcmp(strval, hex) == 0) {
1196 free(hex);
1197 break;
1198 }
1199
1200 /* Replace the label string with the internal form. */
1201 (void) nvlist_remove(ret, zfs_prop_to_name(prop),
1202 DATA_TYPE_STRING);
1203 verify(nvlist_add_string(ret, zfs_prop_to_name(prop),
1204 hex) == 0);
1205 free(hex);
1206
1207 break;
1208
1209 badlabel:
1210 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1211 "invalid mlslabel '%s'"), strval);
1212 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1213 m_label_free(new_sl); /* OK if null */
1214 goto error;
1215
1216 }
1217
1218 case ZFS_PROP_MOUNTPOINT:
1219 {
1220 namecheck_err_t why;
1221
1222 if (strcmp(strval, ZFS_MOUNTPOINT_NONE) == 0 ||
1223 strcmp(strval, ZFS_MOUNTPOINT_LEGACY) == 0)
1224 break;
1225
1226 if (mountpoint_namecheck(strval, &why)) {
1227 switch (why) {
1228 case NAME_ERR_LEADING_SLASH:
1229 zfs_error_aux(hdl,
1230 dgettext(TEXT_DOMAIN,
1231 "'%s' must be an absolute path, "
1232 "'none', or 'legacy'"), propname);
1233 break;
1234 case NAME_ERR_TOOLONG:
1235 zfs_error_aux(hdl,
1236 dgettext(TEXT_DOMAIN,
1237 "component of '%s' is too long"),
1238 propname);
1239 break;
1240
1241 default:
1242 zfs_error_aux(hdl,
1243 dgettext(TEXT_DOMAIN,
1244 "(%d) not defined"),
1245 why);
1246 break;
1247 }
1248 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1249 goto error;
1250 }
1251 }
1252
1253 /*FALLTHRU*/
1254
1255 case ZFS_PROP_SHARESMB:
1256 case ZFS_PROP_SHARENFS:
1257 /*
1258 * For the mountpoint and sharenfs or sharesmb
1259 * properties, check if it can be set in a
1260 * global/non-global zone based on
1261 * the zoned property value:
1262 *
1263 * global zone non-global zone
1264 * --------------------------------------------------
1265 * zoned=on mountpoint (no) mountpoint (yes)
1266 * sharenfs (no) sharenfs (no)
1267 * sharesmb (no) sharesmb (no)
1268 *
1269 * zoned=off mountpoint (yes) N/A
1270 * sharenfs (yes)
1271 * sharesmb (yes)
1272 */
1273 if (zoned) {
1274 if (getzoneid() == GLOBAL_ZONEID) {
1275 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1276 "'%s' cannot be set on "
1277 "dataset in a non-global zone"),
1278 propname);
1279 (void) zfs_error(hdl, EZFS_ZONED,
1280 errbuf);
1281 goto error;
1282 } else if (prop == ZFS_PROP_SHARENFS ||
1283 prop == ZFS_PROP_SHARESMB) {
1284 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1285 "'%s' cannot be set in "
1286 "a non-global zone"), propname);
1287 (void) zfs_error(hdl, EZFS_ZONED,
1288 errbuf);
1289 goto error;
1290 }
1291 } else if (getzoneid() != GLOBAL_ZONEID) {
1292 /*
1293 * If zoned property is 'off', this must be in
1294 * a global zone. If not, something is wrong.
1295 */
1296 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1297 "'%s' cannot be set while dataset "
1298 "'zoned' property is set"), propname);
1299 (void) zfs_error(hdl, EZFS_ZONED, errbuf);
1300 goto error;
1301 }
1302
1303 /*
1304 * At this point, it is legitimate to set the
1305 * property. Now we want to make sure that the
1306 * property value is valid if it is sharenfs.
1307 */
1308 if ((prop == ZFS_PROP_SHARENFS ||
1309 prop == ZFS_PROP_SHARESMB) &&
1310 strcmp(strval, "on") != 0 &&
1311 strcmp(strval, "off") != 0) {
1312 zfs_share_proto_t proto;
1313
1314 if (prop == ZFS_PROP_SHARESMB)
1315 proto = PROTO_SMB;
1316 else
1317 proto = PROTO_NFS;
1318
1319 /*
1320 * Must be an valid sharing protocol
1321 * option string so init the libshare
1322 * in order to enable the parser and
1323 * then parse the options. We use the
1324 * control API since we don't care about
1325 * the current configuration and don't
1326 * want the overhead of loading it
1327 * until we actually do something.
1328 */
1329
1330 if (zfs_init_libshare(hdl,
1331 SA_INIT_CONTROL_API) != SA_OK) {
1332 /*
1333 * An error occurred so we can't do
1334 * anything
1335 */
1336 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1337 "'%s' cannot be set: problem "
1338 "in share initialization"),
1339 propname);
1340 (void) zfs_error(hdl, EZFS_BADPROP,
1341 errbuf);
1342 goto error;
1343 }
1344
1345 if (zfs_parse_options(strval, proto) != SA_OK) {
1346 /*
1347 * There was an error in parsing so
1348 * deal with it by issuing an error
1349 * message and leaving after
1350 * uninitializing the the libshare
1351 * interface.
1352 */
1353 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1354 "'%s' cannot be set to invalid "
1355 "options"), propname);
1356 (void) zfs_error(hdl, EZFS_BADPROP,
1357 errbuf);
1358 zfs_uninit_libshare(hdl);
1359 goto error;
1360 }
1361 zfs_uninit_libshare(hdl);
1362 }
1363
1364 break;
1365
1366 case ZFS_PROP_UTF8ONLY:
1367 chosen_utf = (int)intval;
1368 break;
1369
1370 case ZFS_PROP_NORMALIZE:
1371 chosen_normal = (int)intval;
1372 break;
1373
1374 default:
1375 break;
1376 }
1377
1378 /*
1379 * For changes to existing volumes, we have some additional
1380 * checks to enforce.
1381 */
1382 if (type == ZFS_TYPE_VOLUME && zhp != NULL) {
1383 uint64_t volsize = zfs_prop_get_int(zhp,
1384 ZFS_PROP_VOLSIZE);
1385 uint64_t blocksize = zfs_prop_get_int(zhp,
1386 ZFS_PROP_VOLBLOCKSIZE);
1387 char buf[64];
1388
1389 switch (prop) {
1390 case ZFS_PROP_RESERVATION:
1391 case ZFS_PROP_REFRESERVATION:
1392 if (intval > volsize) {
1393 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1394 "'%s' is greater than current "
1395 "volume size"), propname);
1396 (void) zfs_error(hdl, EZFS_BADPROP,
1397 errbuf);
1398 goto error;
1399 }
1400 break;
1401
1402 case ZFS_PROP_VOLSIZE:
1403 if (intval % blocksize != 0) {
1404 zfs_nicenum(blocksize, buf,
1405 sizeof (buf));
1406 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1407 "'%s' must be a multiple of "
1408 "volume block size (%s)"),
1409 propname, buf);
1410 (void) zfs_error(hdl, EZFS_BADPROP,
1411 errbuf);
1412 goto error;
1413 }
1414
1415 if (intval == 0) {
1416 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1417 "'%s' cannot be zero"),
1418 propname);
1419 (void) zfs_error(hdl, EZFS_BADPROP,
1420 errbuf);
1421 goto error;
1422 }
1423 break;
1424
1425 default:
1426 break;
1427 }
1428 }
1429 }
1430
1431 /*
1432 * If normalization was chosen, but no UTF8 choice was made,
1433 * enforce rejection of non-UTF8 names.
1434 *
1435 * If normalization was chosen, but rejecting non-UTF8 names
1436 * was explicitly not chosen, it is an error.
1437 */
1438 if (chosen_normal > 0 && chosen_utf < 0) {
1439 if (nvlist_add_uint64(ret,
1440 zfs_prop_to_name(ZFS_PROP_UTF8ONLY), 1) != 0) {
1441 (void) no_memory(hdl);
1442 goto error;
1443 }
1444 } else if (chosen_normal > 0 && chosen_utf == 0) {
1445 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1446 "'%s' must be set 'on' if normalization chosen"),
1447 zfs_prop_to_name(ZFS_PROP_UTF8ONLY));
1448 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1449 goto error;
1450 }
1451 return (ret);
1452
1453 error:
1454 nvlist_free(ret);
1455 return (NULL);
1456 }
1457
1458 int
1459 zfs_add_synthetic_resv(zfs_handle_t *zhp, nvlist_t *nvl)
1460 {
1461 uint64_t old_volsize;
1462 uint64_t new_volsize;
1463 uint64_t old_reservation;
1464 uint64_t new_reservation;
1465 zfs_prop_t resv_prop;
1466 nvlist_t *props;
1467
1468 /*
1469 * If this is an existing volume, and someone is setting the volsize,
1470 * make sure that it matches the reservation, or add it if necessary.
1471 */
1472 old_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE);
1473 if (zfs_which_resv_prop(zhp, &resv_prop) < 0)
1474 return (-1);
1475 old_reservation = zfs_prop_get_int(zhp, resv_prop);
1476
1477 props = fnvlist_alloc();
1478 fnvlist_add_uint64(props, zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
1479 zfs_prop_get_int(zhp, ZFS_PROP_VOLBLOCKSIZE));
1480
1481 if ((zvol_volsize_to_reservation(old_volsize, props) !=
1482 old_reservation) || nvlist_exists(nvl,
1483 zfs_prop_to_name(resv_prop))) {
1484 fnvlist_free(props);
1485 return (0);
1486 }
1487 if (nvlist_lookup_uint64(nvl, zfs_prop_to_name(ZFS_PROP_VOLSIZE),
1488 &new_volsize) != 0) {
1489 fnvlist_free(props);
1490 return (-1);
1491 }
1492 new_reservation = zvol_volsize_to_reservation(new_volsize, props);
1493 fnvlist_free(props);
1494
1495 if (nvlist_add_uint64(nvl, zfs_prop_to_name(resv_prop),
1496 new_reservation) != 0) {
1497 (void) no_memory(zhp->zfs_hdl);
1498 return (-1);
1499 }
1500 return (1);
1501 }
1502
1503 void
1504 zfs_setprop_error(libzfs_handle_t *hdl, zfs_prop_t prop, int err,
1505 char *errbuf)
1506 {
1507 switch (err) {
1508
1509 case ENOSPC:
1510 /*
1511 * For quotas and reservations, ENOSPC indicates
1512 * something different; setting a quota or reservation
1513 * doesn't use any disk space.
1514 */
1515 switch (prop) {
1516 case ZFS_PROP_QUOTA:
1517 case ZFS_PROP_REFQUOTA:
1518 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1519 "size is less than current used or "
1520 "reserved space"));
1521 (void) zfs_error(hdl, EZFS_PROPSPACE, errbuf);
1522 break;
1523
1524 case ZFS_PROP_RESERVATION:
1525 case ZFS_PROP_REFRESERVATION:
1526 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1527 "size is greater than available space"));
1528 (void) zfs_error(hdl, EZFS_PROPSPACE, errbuf);
1529 break;
1530
1531 default:
1532 (void) zfs_standard_error(hdl, err, errbuf);
1533 break;
1534 }
1535 break;
1536
1537 case EBUSY:
1538 (void) zfs_standard_error(hdl, EBUSY, errbuf);
1539 break;
1540
1541 case EROFS:
1542 (void) zfs_error(hdl, EZFS_DSREADONLY, errbuf);
1543 break;
1544
1545 case E2BIG:
1546 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1547 "property value too long"));
1548 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1549 break;
1550
1551 case ENOTSUP:
1552 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1553 "pool and or dataset must be upgraded to set this "
1554 "property or value"));
1555 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf);
1556 break;
1557
1558 case ERANGE:
1559 if (prop == ZFS_PROP_COMPRESSION ||
1560 prop == ZFS_PROP_RECORDSIZE) {
1561 (void) zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1562 "property setting is not allowed on "
1563 "bootable datasets"));
1564 (void) zfs_error(hdl, EZFS_NOTSUP, errbuf);
1565 } else if (prop == ZFS_PROP_CHECKSUM ||
1566 prop == ZFS_PROP_DEDUP) {
1567 (void) zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1568 "property setting is not allowed on "
1569 "root pools"));
1570 (void) zfs_error(hdl, EZFS_NOTSUP, errbuf);
1571 } else {
1572 (void) zfs_standard_error(hdl, err, errbuf);
1573 }
1574 break;
1575
1576 case EINVAL:
1577 if (prop == ZPROP_INVAL) {
1578 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1579 } else {
1580 (void) zfs_standard_error(hdl, err, errbuf);
1581 }
1582 break;
1583
1584 case EOVERFLOW:
1585 /*
1586 * This platform can't address a volume this big.
1587 */
1588 #ifdef _ILP32
1589 if (prop == ZFS_PROP_VOLSIZE) {
1590 (void) zfs_error(hdl, EZFS_VOLTOOBIG, errbuf);
1591 break;
1592 }
1593 #endif
1594 /* FALLTHROUGH */
1595 default:
1596 (void) zfs_standard_error(hdl, err, errbuf);
1597 }
1598 }
1599
1600 /*
1601 * Given a property name and value, set the property for the given dataset.
1602 */
1603 int
1604 zfs_prop_set(zfs_handle_t *zhp, const char *propname, const char *propval)
1605 {
1606 int ret = -1;
1607 char errbuf[1024];
1608 libzfs_handle_t *hdl = zhp->zfs_hdl;
1609 nvlist_t *nvl = NULL;
1610
1611 (void) snprintf(errbuf, sizeof (errbuf),
1612 dgettext(TEXT_DOMAIN, "cannot set property for '%s'"),
1613 zhp->zfs_name);
1614
1615 if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0 ||
1616 nvlist_add_string(nvl, propname, propval) != 0) {
1617 (void) no_memory(hdl);
1618 goto error;
1619 }
1620
1621 ret = zfs_prop_set_list(zhp, nvl);
1622
1623 error:
1624 nvlist_free(nvl);
1625 return (ret);
1626 }
1627
1628
1629
1630 /*
1631 * Given an nvlist of property names and values, set the properties for the
1632 * given dataset.
1633 */
1634 int
1635 zfs_prop_set_list(zfs_handle_t *zhp, nvlist_t *props)
1636 {
1637 zfs_cmd_t zc = { 0 };
1638 int ret = -1;
1639 prop_changelist_t **cls = NULL;
1640 int cl_idx;
1641 char errbuf[1024];
1642 libzfs_handle_t *hdl = zhp->zfs_hdl;
1643 nvlist_t *nvl;
1644 int nvl_len;
1645 int added_resv = 0;
1646
1647 (void) snprintf(errbuf, sizeof (errbuf),
1648 dgettext(TEXT_DOMAIN, "cannot set property for '%s'"),
1649 zhp->zfs_name);
1650
1651 if ((nvl = zfs_valid_proplist(hdl, zhp->zfs_type, props,
1652 zfs_prop_get_int(zhp, ZFS_PROP_ZONED), zhp, zhp->zpool_hdl,
1653 errbuf)) == NULL)
1654 goto error;
1655
1656 /*
1657 * We have to check for any extra properties which need to be added
1658 * before computing the length of the nvlist.
1659 */
1660 for (nvpair_t *elem = nvlist_next_nvpair(nvl, NULL);
1661 elem != NULL;
1662 elem = nvlist_next_nvpair(nvl, elem)) {
1663 if (zfs_name_to_prop(nvpair_name(elem)) == ZFS_PROP_VOLSIZE &&
1664 (added_resv = zfs_add_synthetic_resv(zhp, nvl)) == -1) {
1665 goto error;
1666 }
1667 }
1668 /*
1669 * Check how many properties we're setting and allocate an array to
1670 * store changelist pointers for postfix().
1671 */
1672 nvl_len = 0;
1673 for (nvpair_t *elem = nvlist_next_nvpair(nvl, NULL);
1674 elem != NULL;
1675 elem = nvlist_next_nvpair(nvl, elem))
1676 nvl_len++;
1677 if ((cls = calloc(nvl_len, sizeof (prop_changelist_t *))) == NULL)
1678 goto error;
1679
1680 cl_idx = 0;
1681 for (nvpair_t *elem = nvlist_next_nvpair(nvl, NULL);
1682 elem != NULL;
1683 elem = nvlist_next_nvpair(nvl, elem)) {
1684
1685 zfs_prop_t prop = zfs_name_to_prop(nvpair_name(elem));
1686
1687 assert(cl_idx < nvl_len);
1688 /*
1689 * We don't want to unmount & remount the dataset when changing
1690 * its canmount property to 'on' or 'noauto'. We only use
1691 * the changelist logic to unmount when setting canmount=off.
1692 */
1693 if (prop != ZFS_PROP_CANMOUNT ||
1694 (fnvpair_value_uint64(elem) == ZFS_CANMOUNT_OFF &&
1695 zfs_is_mounted(zhp, NULL))) {
1696 cls[cl_idx] = changelist_gather(zhp, prop, 0, 0);
1697 if (cls[cl_idx] == NULL)
1698 goto error;
1699 }
1700
1701 if (prop == ZFS_PROP_MOUNTPOINT &&
1702 changelist_haszonedchild(cls[cl_idx])) {
1703 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1704 "child dataset with inherited mountpoint is used "
1705 "in a non-global zone"));
1706 ret = zfs_error(hdl, EZFS_ZONED, errbuf);
1707 goto error;
1708 }
1709
1710 if (cls[cl_idx] != NULL &&
1711 (ret = changelist_prefix(cls[cl_idx])) != 0)
1712 goto error;
1713
1714 cl_idx++;
1715 }
1716 assert(cl_idx == nvl_len);
1717
1718 /*
1719 * Execute the corresponding ioctl() to set this list of properties.
1720 */
1721 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
1722
1723 if ((ret = zcmd_write_src_nvlist(hdl, &zc, nvl)) != 0 ||
1724 (ret = zcmd_alloc_dst_nvlist(hdl, &zc, 0)) != 0)
1725 goto error;
1726
1727 ret = zfs_ioctl(hdl, ZFS_IOC_SET_PROP, &zc);
1728
1729 if (ret != 0) {
1730 /* Get the list of unset properties back and report them. */
1731 nvlist_t *errorprops = NULL;
1732 if (zcmd_read_dst_nvlist(hdl, &zc, &errorprops) != 0)
1733 goto error;
1734 for (nvpair_t *elem = nvlist_next_nvpair(nvl, NULL);
1735 elem != NULL;
1736 elem = nvlist_next_nvpair(nvl, elem)) {
1737 zfs_prop_t prop = zfs_name_to_prop(nvpair_name(elem));
1738 zfs_setprop_error(hdl, prop, errno, errbuf);
1739 }
1740 nvlist_free(errorprops);
1741
1742 if (added_resv && errno == ENOSPC) {
1743 /* clean up the volsize property we tried to set */
1744 uint64_t old_volsize = zfs_prop_get_int(zhp,
1745 ZFS_PROP_VOLSIZE);
1746 nvlist_free(nvl);
1747 nvl = NULL;
1748 zcmd_free_nvlists(&zc);
1749
1750 if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0)
1751 goto error;
1752 if (nvlist_add_uint64(nvl,
1753 zfs_prop_to_name(ZFS_PROP_VOLSIZE),
1754 old_volsize) != 0)
1755 goto error;
1756 if (zcmd_write_src_nvlist(hdl, &zc, nvl) != 0)
1757 goto error;
1758 (void) zfs_ioctl(hdl, ZFS_IOC_SET_PROP, &zc);
1759 }
1760 } else {
1761 for (cl_idx = 0; cl_idx < nvl_len; cl_idx++) {
1762 if (cls[cl_idx] != NULL) {
1763 int clp_err = changelist_postfix(cls[cl_idx]);
1764 if (clp_err != 0)
1765 ret = clp_err;
1766 }
1767 }
1768
1769 /*
1770 * Refresh the statistics so the new property value
1771 * is reflected.
1772 */
1773 if (ret == 0)
1774 (void) get_stats(zhp);
1775 }
1776
1777 error:
1778 nvlist_free(nvl);
1779 zcmd_free_nvlists(&zc);
1780 if (cls != NULL) {
1781 for (cl_idx = 0; cl_idx < nvl_len; cl_idx++) {
1782 if (cls[cl_idx] != NULL)
1783 changelist_free(cls[cl_idx]);
1784 }
1785 free(cls);
1786 }
1787 return (ret);
1788 }
1789
1790 /*
1791 * Given a property, inherit the value from the parent dataset, or if received
1792 * is TRUE, revert to the received value, if any.
1793 */
1794 int
1795 zfs_prop_inherit(zfs_handle_t *zhp, const char *propname, boolean_t received)
1796 {
1797 zfs_cmd_t zc = { 0 };
1798 int ret;
1799 prop_changelist_t *cl;
1800 libzfs_handle_t *hdl = zhp->zfs_hdl;
1801 char errbuf[1024];
1802 zfs_prop_t prop;
1803
1804 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
1805 "cannot inherit %s for '%s'"), propname, zhp->zfs_name);
1806
1807 zc.zc_cookie = received;
1808 if ((prop = zfs_name_to_prop(propname)) == ZPROP_INVAL) {
1809 /*
1810 * For user properties, the amount of work we have to do is very
1811 * small, so just do it here.
1812 */
1813 if (!zfs_prop_user(propname)) {
1814 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1815 "invalid property"));
1816 return (zfs_error(hdl, EZFS_BADPROP, errbuf));
1817 }
1818
1819 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
1820 (void) strlcpy(zc.zc_value, propname, sizeof (zc.zc_value));
1821
1822 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_INHERIT_PROP, &zc) != 0)
1823 return (zfs_standard_error(hdl, errno, errbuf));
1824
1825 return (0);
1826 }
1827
1828 /*
1829 * Verify that this property is inheritable.
1830 */
1831 if (zfs_prop_readonly(prop))
1832 return (zfs_error(hdl, EZFS_PROPREADONLY, errbuf));
1833
1834 if (!zfs_prop_inheritable(prop) && !received)
1835 return (zfs_error(hdl, EZFS_PROPNONINHERIT, errbuf));
1836
1837 /*
1838 * Check to see if the value applies to this type
1839 */
1840 if (!zfs_prop_valid_for_type(prop, zhp->zfs_type))
1841 return (zfs_error(hdl, EZFS_PROPTYPE, errbuf));
1842
1843 /*
1844 * Normalize the name, to get rid of shorthand abbreviations.
1845 */
1846 propname = zfs_prop_to_name(prop);
1847 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
1848 (void) strlcpy(zc.zc_value, propname, sizeof (zc.zc_value));
1849
1850 if (prop == ZFS_PROP_MOUNTPOINT && getzoneid() == GLOBAL_ZONEID &&
1851 zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) {
1852 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1853 "dataset is used in a non-global zone"));
1854 return (zfs_error(hdl, EZFS_ZONED, errbuf));
1855 }
1856
1857 /*
1858 * Determine datasets which will be affected by this change, if any.
1859 */
1860 if ((cl = changelist_gather(zhp, prop, 0, 0)) == NULL)
1861 return (-1);
1862
1863 if (prop == ZFS_PROP_MOUNTPOINT && changelist_haszonedchild(cl)) {
1864 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1865 "child dataset with inherited mountpoint is used "
1866 "in a non-global zone"));
1867 ret = zfs_error(hdl, EZFS_ZONED, errbuf);
1868 goto error;
1869 }
1870
1871 if ((ret = changelist_prefix(cl)) != 0)
1872 goto error;
1873
1874 if ((ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_INHERIT_PROP, &zc)) != 0) {
1875 return (zfs_standard_error(hdl, errno, errbuf));
1876 } else {
1877
1878 if ((ret = changelist_postfix(cl)) != 0)
1879 goto error;
1880
1881 /*
1882 * Refresh the statistics so the new property is reflected.
1883 */
1884 (void) get_stats(zhp);
1885 }
1886
1887 error:
1888 changelist_free(cl);
1889 return (ret);
1890 }
1891
1892 /*
1893 * True DSL properties are stored in an nvlist. The following two functions
1894 * extract them appropriately.
1895 */
1896 static uint64_t
1897 getprop_uint64(zfs_handle_t *zhp, zfs_prop_t prop, char **source)
1898 {
1899 nvlist_t *nv;
1900 uint64_t value;
1901
1902 *source = NULL;
1903 if (nvlist_lookup_nvlist(zhp->zfs_props,
1904 zfs_prop_to_name(prop), &nv) == 0) {
1905 verify(nvlist_lookup_uint64(nv, ZPROP_VALUE, &value) == 0);
1906 (void) nvlist_lookup_string(nv, ZPROP_SOURCE, source);
1907 } else {
1908 verify(!zhp->zfs_props_table ||
1909 zhp->zfs_props_table[prop] == B_TRUE);
1910 value = zfs_prop_default_numeric(prop);
1911 *source = "";
1912 }
1913
1914 return (value);
1915 }
1916
1917 static const char *
1918 getprop_string(zfs_handle_t *zhp, zfs_prop_t prop, char **source)
1919 {
1920 nvlist_t *nv;
1921 const char *value;
1922
1923 *source = NULL;
1924 if (nvlist_lookup_nvlist(zhp->zfs_props,
1925 zfs_prop_to_name(prop), &nv) == 0) {
1926 value = fnvlist_lookup_string(nv, ZPROP_VALUE);
1927 (void) nvlist_lookup_string(nv, ZPROP_SOURCE, source);
1928 } else {
1929 verify(!zhp->zfs_props_table ||
1930 zhp->zfs_props_table[prop] == B_TRUE);
1931 value = zfs_prop_default_string(prop);
1932 *source = "";
1933 }
1934
1935 return (value);
1936 }
1937
1938 static boolean_t
1939 zfs_is_recvd_props_mode(zfs_handle_t *zhp)
1940 {
1941 return (zhp->zfs_props == zhp->zfs_recvd_props);
1942 }
1943
1944 static void
1945 zfs_set_recvd_props_mode(zfs_handle_t *zhp, uint64_t *cookie)
1946 {
1947 *cookie = (uint64_t)(uintptr_t)zhp->zfs_props;
1948 zhp->zfs_props = zhp->zfs_recvd_props;
1949 }
1950
1951 static void
1952 zfs_unset_recvd_props_mode(zfs_handle_t *zhp, uint64_t *cookie)
1953 {
1954 zhp->zfs_props = (nvlist_t *)(uintptr_t)*cookie;
1955 *cookie = 0;
1956 }
1957
1958 /*
1959 * Internal function for getting a numeric property. Both zfs_prop_get() and
1960 * zfs_prop_get_int() are built using this interface.
1961 *
1962 * Certain properties can be overridden using 'mount -o'. In this case, scan
1963 * the contents of the /etc/mnttab entry, searching for the appropriate options.
1964 * If they differ from the on-disk values, report the current values and mark
1965 * the source "temporary".
1966 */
1967 static int
1968 get_numeric_property(zfs_handle_t *zhp, zfs_prop_t prop, zprop_source_t *src,
1969 char **source, uint64_t *val)
1970 {
1971 zfs_cmd_t zc = { 0 };
1972 nvlist_t *zplprops = NULL;
1973 struct mnttab mnt;
1974 char *mntopt_on = NULL;
1975 char *mntopt_off = NULL;
1976 boolean_t received = zfs_is_recvd_props_mode(zhp);
1977
1978 *source = NULL;
1979
1980 switch (prop) {
1981 case ZFS_PROP_ATIME:
1982 mntopt_on = MNTOPT_ATIME;
1983 mntopt_off = MNTOPT_NOATIME;
1984 break;
1985
1986 case ZFS_PROP_DEVICES:
1987 mntopt_on = MNTOPT_DEVICES;
1988 mntopt_off = MNTOPT_NODEVICES;
1989 break;
1990
1991 case ZFS_PROP_EXEC:
1992 mntopt_on = MNTOPT_EXEC;
1993 mntopt_off = MNTOPT_NOEXEC;
1994 break;
1995
1996 case ZFS_PROP_READONLY:
1997 mntopt_on = MNTOPT_RO;
1998 mntopt_off = MNTOPT_RW;
1999 break;
2000
2001 case ZFS_PROP_SETUID:
2002 mntopt_on = MNTOPT_SETUID;
2003 mntopt_off = MNTOPT_NOSETUID;
2004 break;
2005
2006 case ZFS_PROP_XATTR:
2007 mntopt_on = MNTOPT_XATTR;
2008 mntopt_off = MNTOPT_NOXATTR;
2009 break;
2010
2011 case ZFS_PROP_NBMAND:
2012 mntopt_on = MNTOPT_NBMAND;
2013 mntopt_off = MNTOPT_NONBMAND;
2014 break;
2015
2016 default:
2017 break;
2018 }
2019
2020 /*
2021 * Because looking up the mount options is potentially expensive
2022 * (iterating over all of /etc/mnttab), we defer its calculation until
2023 * we're looking up a property which requires its presence.
2024 */
2025 if (!zhp->zfs_mntcheck &&
2026 (mntopt_on != NULL || prop == ZFS_PROP_MOUNTED)) {
2027 libzfs_handle_t *hdl = zhp->zfs_hdl;
2028 struct mnttab entry;
2029
2030 if (libzfs_mnttab_find(hdl, zhp->zfs_name, &entry) == 0) {
2031 zhp->zfs_mntopts = zfs_strdup(hdl,
2032 entry.mnt_mntopts);
2033 if (zhp->zfs_mntopts == NULL)
2034 return (-1);
2035 }
2036
2037 zhp->zfs_mntcheck = B_TRUE;
2038 }
2039
2040 if (zhp->zfs_mntopts == NULL)
2041 mnt.mnt_mntopts = "";
2042 else
2043 mnt.mnt_mntopts = zhp->zfs_mntopts;
2044
2045 switch (prop) {
2046 case ZFS_PROP_ATIME:
2047 case ZFS_PROP_DEVICES:
2048 case ZFS_PROP_EXEC:
2049 case ZFS_PROP_READONLY:
2050 case ZFS_PROP_SETUID:
2051 case ZFS_PROP_XATTR:
2052 case ZFS_PROP_NBMAND:
2053 *val = getprop_uint64(zhp, prop, source);
2054
2055 if (received)
2056 break;
2057
2058 if (hasmntopt(&mnt, mntopt_on) && !*val) {
2059 *val = B_TRUE;
2060 if (src)
2061 *src = ZPROP_SRC_TEMPORARY;
2062 } else if (hasmntopt(&mnt, mntopt_off) && *val) {
2063 *val = B_FALSE;
2064 if (src)
2065 *src = ZPROP_SRC_TEMPORARY;
2066 }
2067 break;
2068
2069 case ZFS_PROP_CANMOUNT:
2070 case ZFS_PROP_VOLSIZE:
2071 case ZFS_PROP_QUOTA:
2072 case ZFS_PROP_REFQUOTA:
2073 case ZFS_PROP_RESERVATION:
2074 case ZFS_PROP_REFRESERVATION:
2075 case ZFS_PROP_FILESYSTEM_LIMIT:
2076 case ZFS_PROP_SNAPSHOT_LIMIT:
2077 case ZFS_PROP_FILESYSTEM_COUNT:
2078 case ZFS_PROP_SNAPSHOT_COUNT:
2079 *val = getprop_uint64(zhp, prop, source);
2080
2081 if (*source == NULL) {
2082 /* not default, must be local */
2083 *source = zhp->zfs_name;
2084 }
2085 break;
2086
2087 case ZFS_PROP_MOUNTED:
2088 *val = (zhp->zfs_mntopts != NULL);
2089 break;
2090
2091 case ZFS_PROP_NUMCLONES:
2092 *val = zhp->zfs_dmustats.dds_num_clones;
2093 break;
2094
2095 case ZFS_PROP_VERSION:
2096 case ZFS_PROP_NORMALIZE:
2097 case ZFS_PROP_UTF8ONLY:
2098 case ZFS_PROP_CASE:
2099 if (!zfs_prop_valid_for_type(prop, zhp->zfs_head_type) ||
2100 zcmd_alloc_dst_nvlist(zhp->zfs_hdl, &zc, 0) != 0)
2101 return (-1);
2102 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
2103 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_OBJSET_ZPLPROPS, &zc)) {
2104 zcmd_free_nvlists(&zc);
2105 return (-1);
2106 }
2107 if (zcmd_read_dst_nvlist(zhp->zfs_hdl, &zc, &zplprops) != 0 ||
2108 nvlist_lookup_uint64(zplprops, zfs_prop_to_name(prop),
2109 val) != 0) {
2110 zcmd_free_nvlists(&zc);
2111 return (-1);
2112 }
2113 nvlist_free(zplprops);
2114 zcmd_free_nvlists(&zc);
2115 break;
2116
2117 case ZFS_PROP_INCONSISTENT:
2118 *val = zhp->zfs_dmustats.dds_inconsistent;
2119 break;
2120
2121 default:
2122 switch (zfs_prop_get_type(prop)) {
2123 case PROP_TYPE_NUMBER:
2124 case PROP_TYPE_INDEX:
2125 *val = getprop_uint64(zhp, prop, source);
2126 /*
2127 * If we tried to use a default value for a
2128 * readonly property, it means that it was not
2129 * present. Note this only applies to "truly"
2130 * readonly properties, not set-once properties
2131 * like volblocksize.
2132 */
2133 if (zfs_prop_readonly(prop) &&
2134 !zfs_prop_setonce(prop) &&
2135 *source != NULL && (*source)[0] == '\0') {
2136 *source = NULL;
2137 return (-1);
2138 }
2139 break;
2140
2141 case PROP_TYPE_STRING:
2142 default:
2143 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
2144 "cannot get non-numeric property"));
2145 return (zfs_error(zhp->zfs_hdl, EZFS_BADPROP,
2146 dgettext(TEXT_DOMAIN, "internal error")));
2147 }
2148 }
2149
2150 return (0);
2151 }
2152
2153 /*
2154 * Calculate the source type, given the raw source string.
2155 */
2156 static void
2157 get_source(zfs_handle_t *zhp, zprop_source_t *srctype, char *source,
2158 char *statbuf, size_t statlen)
2159 {
2160 if (statbuf == NULL || *srctype == ZPROP_SRC_TEMPORARY)
2161 return;
2162
2163 if (source == NULL) {
2164 *srctype = ZPROP_SRC_NONE;
2165 } else if (source[0] == '\0') {
2166 *srctype = ZPROP_SRC_DEFAULT;
2167 } else if (strstr(source, ZPROP_SOURCE_VAL_RECVD) != NULL) {
2168 *srctype = ZPROP_SRC_RECEIVED;
2169 } else {
2170 if (strcmp(source, zhp->zfs_name) == 0) {
2171 *srctype = ZPROP_SRC_LOCAL;
2172 } else {
2173 (void) strlcpy(statbuf, source, statlen);
2174 *srctype = ZPROP_SRC_INHERITED;
2175 }
2176 }
2177
2178 }
2179
2180 int
2181 zfs_prop_get_recvd(zfs_handle_t *zhp, const char *propname, char *propbuf,
2182 size_t proplen, boolean_t literal)
2183 {
2184 zfs_prop_t prop;
2185 int err = 0;
2186
2187 if (zhp->zfs_recvd_props == NULL)
2188 if (get_recvd_props_ioctl(zhp) != 0)
2189 return (-1);
2190
2191 prop = zfs_name_to_prop(propname);
2192
2193 if (prop != ZPROP_INVAL) {
2194 uint64_t cookie;
2195 if (!nvlist_exists(zhp->zfs_recvd_props, propname))
2196 return (-1);
2197 zfs_set_recvd_props_mode(zhp, &cookie);
2198 err = zfs_prop_get(zhp, prop, propbuf, proplen,
2199 NULL, NULL, 0, literal);
2200 zfs_unset_recvd_props_mode(zhp, &cookie);
2201 } else {
2202 nvlist_t *propval;
2203 char *recvdval;
2204 if (nvlist_lookup_nvlist(zhp->zfs_recvd_props,
2205 propname, &propval) != 0)
2206 return (-1);
2207 verify(nvlist_lookup_string(propval, ZPROP_VALUE,
2208 &recvdval) == 0);
2209 (void) strlcpy(propbuf, recvdval, proplen);
2210 }
2211
2212 return (err == 0 ? 0 : -1);
2213 }
2214
2215 static int
2216 get_clones_string(zfs_handle_t *zhp, char *propbuf, size_t proplen)
2217 {
2218 nvlist_t *value;
2219 nvpair_t *pair;
2220
2221 value = zfs_get_clones_nvl(zhp);
2222 if (value == NULL)
2223 return (-1);
2224
2225 propbuf[0] = '\0';
2226 for (pair = nvlist_next_nvpair(value, NULL); pair != NULL;
2227 pair = nvlist_next_nvpair(value, pair)) {
2228 if (propbuf[0] != '\0')
2229 (void) strlcat(propbuf, ",", proplen);
2230 (void) strlcat(propbuf, nvpair_name(pair), proplen);
2231 }
2232
2233 return (0);
2234 }
2235
2236 struct get_clones_arg {
2237 uint64_t numclones;
2238 nvlist_t *value;
2239 const char *origin;
2240 char buf[ZFS_MAX_DATASET_NAME_LEN];
2241 };
2242
2243 int
2244 get_clones_cb(zfs_handle_t *zhp, void *arg)
2245 {
2246 struct get_clones_arg *gca = arg;
2247
2248 if (gca->numclones == 0) {
2249 zfs_close(zhp);
2250 return (0);
2251 }
2252
2253 if (zfs_prop_get(zhp, ZFS_PROP_ORIGIN, gca->buf, sizeof (gca->buf),
2254 NULL, NULL, 0, B_TRUE) != 0)
2255 goto out;
2256 if (strcmp(gca->buf, gca->origin) == 0) {
2257 fnvlist_add_boolean(gca->value, zfs_get_name(zhp));
2258 gca->numclones--;
2259 }
2260
2261 out:
2262 (void) zfs_iter_children(zhp, get_clones_cb, gca);
2263 zfs_close(zhp);
2264 return (0);
2265 }
2266
2267 nvlist_t *
2268 zfs_get_clones_nvl(zfs_handle_t *zhp)
2269 {
2270 nvlist_t *nv, *value;
2271
2272 if (nvlist_lookup_nvlist(zhp->zfs_props,
2273 zfs_prop_to_name(ZFS_PROP_CLONES), &nv) != 0) {
2274 struct get_clones_arg gca;
2275
2276 /*
2277 * if this is a snapshot, then the kernel wasn't able
2278 * to get the clones. Do it by slowly iterating.
2279 */
2280 if (zhp->zfs_type != ZFS_TYPE_SNAPSHOT)
2281 return (NULL);
2282 if (nvlist_alloc(&nv, NV_UNIQUE_NAME, 0) != 0)
2283 return (NULL);
2284 if (nvlist_alloc(&value, NV_UNIQUE_NAME, 0) != 0) {
2285 nvlist_free(nv);
2286 return (NULL);
2287 }
2288
2289 gca.numclones = zfs_prop_get_int(zhp, ZFS_PROP_NUMCLONES);
2290 gca.value = value;
2291 gca.origin = zhp->zfs_name;
2292
2293 if (gca.numclones != 0) {
2294 zfs_handle_t *root;
2295 char pool[ZFS_MAX_DATASET_NAME_LEN];
2296 char *cp = pool;
2297
2298 /* get the pool name */
2299 (void) strlcpy(pool, zhp->zfs_name, sizeof (pool));
2300 (void) strsep(&cp, "/@");
2301 root = zfs_open(zhp->zfs_hdl, pool,
2302 ZFS_TYPE_FILESYSTEM);
2303
2304 (void) get_clones_cb(root, &gca);
2305 }
2306
2307 if (gca.numclones != 0 ||
2308 nvlist_add_nvlist(nv, ZPROP_VALUE, value) != 0 ||
2309 nvlist_add_nvlist(zhp->zfs_props,
2310 zfs_prop_to_name(ZFS_PROP_CLONES), nv) != 0) {
2311 nvlist_free(nv);
2312 nvlist_free(value);
2313 return (NULL);
2314 }
2315 nvlist_free(nv);
2316 nvlist_free(value);
2317 verify(0 == nvlist_lookup_nvlist(zhp->zfs_props,
2318 zfs_prop_to_name(ZFS_PROP_CLONES), &nv));
2319 }
2320
2321 verify(nvlist_lookup_nvlist(nv, ZPROP_VALUE, &value) == 0);
2322
2323 return (value);
2324 }
2325
2326 /*
2327 * Retrieve a property from the given object. If 'literal' is specified, then
2328 * numbers are left as exact values. Otherwise, numbers are converted to a
2329 * human-readable form.
2330 *
2331 * Returns 0 on success, or -1 on error.
2332 */
2333 int
2334 zfs_prop_get(zfs_handle_t *zhp, zfs_prop_t prop, char *propbuf, size_t proplen,
2335 zprop_source_t *src, char *statbuf, size_t statlen, boolean_t literal)
2336 {
2337 char *source = NULL;
2338 uint64_t val;
2339 const char *str;
2340 const char *strval;
2341 boolean_t received = zfs_is_recvd_props_mode(zhp);
2342
2343 /*
2344 * Check to see if this property applies to our object
2345 */
2346 if (!zfs_prop_valid_for_type(prop, zhp->zfs_type))
2347 return (-1);
2348
2349 if (received && zfs_prop_readonly(prop))
2350 return (-1);
2351
2352 if (src)
2353 *src = ZPROP_SRC_NONE;
2354
2355 switch (prop) {
2356 case ZFS_PROP_CREATION:
2357 /*
2358 * 'creation' is a time_t stored in the statistics. We convert
2359 * this into a string unless 'literal' is specified.
2360 */
2361 {
2362 val = getprop_uint64(zhp, prop, &source);
2363 time_t time = (time_t)val;
2364 struct tm t;
2365
2366 if (literal ||
2367 localtime_r(&time, &t) == NULL ||
2368 strftime(propbuf, proplen, "%a %b %e %k:%M %Y",
2369 &t) == 0)
2370 (void) snprintf(propbuf, proplen, "%llu", val);
2371 }
2372 break;
2373
2374 case ZFS_PROP_MOUNTPOINT:
2375 /*
2376 * Getting the precise mountpoint can be tricky.
2377 *
2378 * - for 'none' or 'legacy', return those values.
2379 * - for inherited mountpoints, we want to take everything
2380 * after our ancestor and append it to the inherited value.
2381 *
2382 * If the pool has an alternate root, we want to prepend that
2383 * root to any values we return.
2384 */
2385
2386 str = getprop_string(zhp, prop, &source);
2387
2388 if (str[0] == '/') {
2389 char buf[MAXPATHLEN];
2390 char *root = buf;
2391 const char *relpath;
2392
2393 /*
2394 * If we inherit the mountpoint, even from a dataset
2395 * with a received value, the source will be the path of
2396 * the dataset we inherit from. If source is
2397 * ZPROP_SOURCE_VAL_RECVD, the received value is not
2398 * inherited.
2399 */
2400 if (strcmp(source, ZPROP_SOURCE_VAL_RECVD) == 0) {
2401 relpath = "";
2402 } else {
2403 relpath = zhp->zfs_name + strlen(source);
2404 if (relpath[0] == '/')
2405 relpath++;
2406 }
2407
2408 if ((zpool_get_prop(zhp->zpool_hdl,
2409 ZPOOL_PROP_ALTROOT, buf, MAXPATHLEN, NULL,
2410 B_FALSE)) || (strcmp(root, "-") == 0))
2411 root[0] = '\0';
2412 /*
2413 * Special case an alternate root of '/'. This will
2414 * avoid having multiple leading slashes in the
2415 * mountpoint path.
2416 */
2417 if (strcmp(root, "/") == 0)
2418 root++;
2419
2420 /*
2421 * If the mountpoint is '/' then skip over this
2422 * if we are obtaining either an alternate root or
2423 * an inherited mountpoint.
2424 */
2425 if (str[1] == '\0' && (root[0] != '\0' ||
2426 relpath[0] != '\0'))
2427 str++;
2428
2429 if (relpath[0] == '\0')
2430 (void) snprintf(propbuf, proplen, "%s%s",
2431 root, str);
2432 else
2433 (void) snprintf(propbuf, proplen, "%s%s%s%s",
2434 root, str, relpath[0] == '@' ? "" : "/",
2435 relpath);
2436 } else {
2437 /* 'legacy' or 'none' */
2438 (void) strlcpy(propbuf, str, proplen);
2439 }
2440
2441 break;
2442
2443 case ZFS_PROP_ORIGIN:
2444 str = getprop_string(zhp, prop, &source);
2445 if (str == NULL)
2446 return (-1);
2447 (void) strlcpy(propbuf, str, proplen);
2448 break;
2449
2450 case ZFS_PROP_CLONES:
2451 if (get_clones_string(zhp, propbuf, proplen) != 0)
2452 return (-1);
2453 break;
2454
2455 case ZFS_PROP_QUOTA:
2456 case ZFS_PROP_REFQUOTA:
2457 case ZFS_PROP_RESERVATION:
2458 case ZFS_PROP_REFRESERVATION:
2459
2460 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2461 return (-1);
2462
2463 /*
2464 * If quota or reservation is 0, we translate this into 'none'
2465 * (unless literal is set), and indicate that it's the default
2466 * value. Otherwise, we print the number nicely and indicate
2467 * that its set locally.
2468 */
2469 if (val == 0) {
2470 if (literal)
2471 (void) strlcpy(propbuf, "0", proplen);
2472 else
2473 (void) strlcpy(propbuf, "none", proplen);
2474 } else {
2475 if (literal)
2476 (void) snprintf(propbuf, proplen, "%llu",
2477 (u_longlong_t)val);
2478 else
2479 zfs_nicenum(val, propbuf, proplen);
2480 }
2481 break;
2482
2483 case ZFS_PROP_FILESYSTEM_LIMIT:
2484 case ZFS_PROP_SNAPSHOT_LIMIT:
2485 case ZFS_PROP_FILESYSTEM_COUNT:
2486 case ZFS_PROP_SNAPSHOT_COUNT:
2487
2488 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2489 return (-1);
2490
2491 /*
2492 * If limit is UINT64_MAX, we translate this into 'none' (unless
2493 * literal is set), and indicate that it's the default value.
2494 * Otherwise, we print the number nicely and indicate that it's
2495 * set locally.
2496 */
2497 if (literal) {
2498 (void) snprintf(propbuf, proplen, "%llu",
2499 (u_longlong_t)val);
2500 } else if (val == UINT64_MAX) {
2501 (void) strlcpy(propbuf, "none", proplen);
2502 } else {
2503 zfs_nicenum(val, propbuf, proplen);
2504 }
2505 break;
2506
2507 case ZFS_PROP_REFRATIO:
2508 case ZFS_PROP_COMPRESSRATIO:
2509 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2510 return (-1);
2511 (void) snprintf(propbuf, proplen, "%llu.%02llux",
2512 (u_longlong_t)(val / 100),
2513 (u_longlong_t)(val % 100));
2514 break;
2515
2516 case ZFS_PROP_TYPE:
2517 switch (zhp->zfs_type) {
2518 case ZFS_TYPE_FILESYSTEM:
2519 str = "filesystem";
2520 break;
2521 case ZFS_TYPE_VOLUME:
2522 str = "volume";
2523 break;
2524 case ZFS_TYPE_SNAPSHOT:
2525 str = "snapshot";
2526 break;
2527 case ZFS_TYPE_BOOKMARK:
2528 str = "bookmark";
2529 break;
2530 default:
2531 abort();
2532 }
2533 (void) snprintf(propbuf, proplen, "%s", str);
2534 break;
2535
2536 case ZFS_PROP_MOUNTED:
2537 /*
2538 * The 'mounted' property is a pseudo-property that described
2539 * whether the filesystem is currently mounted. Even though
2540 * it's a boolean value, the typical values of "on" and "off"
2541 * don't make sense, so we translate to "yes" and "no".
2542 */
2543 if (get_numeric_property(zhp, ZFS_PROP_MOUNTED,
2544 src, &source, &val) != 0)
2545 return (-1);
2546 if (val)
2547 (void) strlcpy(propbuf, "yes", proplen);
2548 else
2549 (void) strlcpy(propbuf, "no", proplen);
2550 break;
2551
2552 case ZFS_PROP_NAME:
2553 /*
2554 * The 'name' property is a pseudo-property derived from the
2555 * dataset name. It is presented as a real property to simplify
2556 * consumers.
2557 */
2558 (void) strlcpy(propbuf, zhp->zfs_name, proplen);
2559 break;
2560
2561 case ZFS_PROP_MLSLABEL:
2562 {
2563 m_label_t *new_sl = NULL;
2564 char *ascii = NULL; /* human readable label */
2565
2566 (void) strlcpy(propbuf,
2567 getprop_string(zhp, prop, &source), proplen);
2568
2569 if (literal || (strcasecmp(propbuf,
2570 ZFS_MLSLABEL_DEFAULT) == 0))
2571 break;
2572
2573 /*
2574 * Try to translate the internal hex string to
2575 * human-readable output. If there are any
2576 * problems just use the hex string.
2577 */
2578
2579 if (str_to_label(propbuf, &new_sl, MAC_LABEL,
2580 L_NO_CORRECTION, NULL) == -1) {
2581 m_label_free(new_sl);
2582 break;
2583 }
2584
2585 if (label_to_str(new_sl, &ascii, M_LABEL,
2586 DEF_NAMES) != 0) {
2587 if (ascii)
2588 free(ascii);
2589 m_label_free(new_sl);
2590 break;
2591 }
2592 m_label_free(new_sl);
2593
2594 (void) strlcpy(propbuf, ascii, proplen);
2595 free(ascii);
2596 }
2597 break;
2598
2599 case ZFS_PROP_GUID:
2600 /*
2601 * GUIDs are stored as numbers, but they are identifiers.
2602 * We don't want them to be pretty printed, because pretty
2603 * printing mangles the ID into a truncated and useless value.
2604 */
2605 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2606 return (-1);
2607 (void) snprintf(propbuf, proplen, "%llu", (u_longlong_t)val);
2608 break;
2609
2610 default:
2611 switch (zfs_prop_get_type(prop)) {
2612 case PROP_TYPE_NUMBER:
2613 if (get_numeric_property(zhp, prop, src,
2614 &source, &val) != 0)
2615 return (-1);
2616 if (literal)
2617 (void) snprintf(propbuf, proplen, "%llu",
2618 (u_longlong_t)val);
2619 else
2620 zfs_nicenum(val, propbuf, proplen);
2621 break;
2622
2623 case PROP_TYPE_STRING:
2624 str = getprop_string(zhp, prop, &source);
2625 if (str == NULL)
2626 return (-1);
2627 (void) strlcpy(propbuf, str, proplen);
2628 break;
2629
2630 case PROP_TYPE_INDEX:
2631 if (get_numeric_property(zhp, prop, src,
2632 &source, &val) != 0)
2633 return (-1);
2634 if (zfs_prop_index_to_string(prop, val, &strval) != 0)
2635 return (-1);
2636 (void) strlcpy(propbuf, strval, proplen);
2637 break;
2638
2639 default:
2640 abort();
2641 }
2642 }
2643
2644 get_source(zhp, src, source, statbuf, statlen);
2645
2646 return (0);
2647 }
2648
2649 /*
2650 * Utility function to get the given numeric property. Does no validation that
2651 * the given property is the appropriate type; should only be used with
2652 * hard-coded property types.
2653 */
2654 uint64_t
2655 zfs_prop_get_int(zfs_handle_t *zhp, zfs_prop_t prop)
2656 {
2657 char *source;
2658 uint64_t val;
2659
2660 (void) get_numeric_property(zhp, prop, NULL, &source, &val);
2661
2662 return (val);
2663 }
2664
2665 int
2666 zfs_prop_set_int(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t val)
2667 {
2668 char buf[64];
2669
2670 (void) snprintf(buf, sizeof (buf), "%llu", (longlong_t)val);
2671 return (zfs_prop_set(zhp, zfs_prop_to_name(prop), buf));
2672 }
2673
2674 /*
2675 * Similar to zfs_prop_get(), but returns the value as an integer.
2676 */
2677 int
2678 zfs_prop_get_numeric(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t *value,
2679 zprop_source_t *src, char *statbuf, size_t statlen)
2680 {
2681 char *source;
2682
2683 /*
2684 * Check to see if this property applies to our object
2685 */
2686 if (!zfs_prop_valid_for_type(prop, zhp->zfs_type)) {
2687 return (zfs_error_fmt(zhp->zfs_hdl, EZFS_PROPTYPE,
2688 dgettext(TEXT_DOMAIN, "cannot get property '%s'"),
2689 zfs_prop_to_name(prop)));
2690 }
2691
2692 if (src)
2693 *src = ZPROP_SRC_NONE;
2694
2695 if (get_numeric_property(zhp, prop, src, &source, value) != 0)
2696 return (-1);
2697
2698 get_source(zhp, src, source, statbuf, statlen);
2699
2700 return (0);
2701 }
2702
2703 static int
2704 idmap_id_to_numeric_domain_rid(uid_t id, boolean_t isuser,
2705 char **domainp, idmap_rid_t *ridp)
2706 {
2707 idmap_get_handle_t *get_hdl = NULL;
2708 idmap_stat status;
2709 int err = EINVAL;
2710
2711 if (idmap_get_create(&get_hdl) != IDMAP_SUCCESS)
2712 goto out;
2713
2714 if (isuser) {
2715 err = idmap_get_sidbyuid(get_hdl, id,
2716 IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status);
2717 } else {
2718 err = idmap_get_sidbygid(get_hdl, id,
2719 IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status);
2720 }
2721 if (err == IDMAP_SUCCESS &&
2722 idmap_get_mappings(get_hdl) == IDMAP_SUCCESS &&
2723 status == IDMAP_SUCCESS)
2724 err = 0;
2725 else
2726 err = EINVAL;
2727 out:
2728 if (get_hdl)
2729 idmap_get_destroy(get_hdl);
2730 return (err);
2731 }
2732
2733 /*
2734 * convert the propname into parameters needed by kernel
2735 * Eg: userquota@ahrens -> ZFS_PROP_USERQUOTA, "", 126829
2736 * Eg: userused@matt@domain -> ZFS_PROP_USERUSED, "S-1-123-456", 789
2737 */
2738 static int
2739 userquota_propname_decode(const char *propname, boolean_t zoned,
2740 zfs_userquota_prop_t *typep, char *domain, int domainlen, uint64_t *ridp)
2741 {
2742 zfs_userquota_prop_t type;
2743 char *cp, *end;
2744 char *numericsid = NULL;
2745 boolean_t isuser;
2746
2747 domain[0] = '\0';
2748 *ridp = 0;
2749 /* Figure out the property type ({user|group}{quota|space}) */
2750 for (type = 0; type < ZFS_NUM_USERQUOTA_PROPS; type++) {
2751 if (strncmp(propname, zfs_userquota_prop_prefixes[type],
2752 strlen(zfs_userquota_prop_prefixes[type])) == 0)
2753 break;
2754 }
2755 if (type == ZFS_NUM_USERQUOTA_PROPS)
2756 return (EINVAL);
2757 *typep = type;
2758
2759 isuser = (type == ZFS_PROP_USERQUOTA ||
2760 type == ZFS_PROP_USERUSED);
2761
2762 cp = strchr(propname, '@') + 1;
2763
2764 if (strchr(cp, '@')) {
2765 /*
2766 * It's a SID name (eg "user@domain") that needs to be
2767 * turned into S-1-domainID-RID.
2768 */
2769 int flag = 0;
2770 idmap_stat stat, map_stat;
2771 uid_t pid;
2772 idmap_rid_t rid;
2773 idmap_get_handle_t *gh = NULL;
2774
2775 stat = idmap_get_create(&gh);
2776 if (stat != IDMAP_SUCCESS) {
2777 idmap_get_destroy(gh);
2778 return (ENOMEM);
2779 }
2780 if (zoned && getzoneid() == GLOBAL_ZONEID)
2781 return (ENOENT);
2782 if (isuser) {
2783 stat = idmap_getuidbywinname(cp, NULL, flag, &pid);
2784 if (stat < 0)
2785 return (ENOENT);
2786 stat = idmap_get_sidbyuid(gh, pid, flag, &numericsid,
2787 &rid, &map_stat);
2788 } else {
2789 stat = idmap_getgidbywinname(cp, NULL, flag, &pid);
2790 if (stat < 0)
2791 return (ENOENT);
2792 stat = idmap_get_sidbygid(gh, pid, flag, &numericsid,
2793 &rid, &map_stat);
2794 }
2795 if (stat < 0) {
2796 idmap_get_destroy(gh);
2797 return (ENOENT);
2798 }
2799 stat = idmap_get_mappings(gh);
2800 idmap_get_destroy(gh);
2801
2802 if (stat < 0) {
2803 return (ENOENT);
2804 }
2805 if (numericsid == NULL)
2806 return (ENOENT);
2807 cp = numericsid;
2808 *ridp = rid;
2809 /* will be further decoded below */
2810 }
2811
2812 if (strncmp(cp, "S-1-", 4) == 0) {
2813 /* It's a numeric SID (eg "S-1-234-567-89") */
2814 (void) strlcpy(domain, cp, domainlen);
2815 errno = 0;
2816 if (*ridp == 0) {
2817 cp = strrchr(domain, '-');
2818 *cp = '\0';
2819 cp++;
2820 *ridp = strtoull(cp, &end, 10);
2821 } else {
2822 end = "";
2823 }
2824 if (numericsid) {
2825 free(numericsid);
2826 numericsid = NULL;
2827 }
2828 if (errno != 0 || *end != '\0')
2829 return (EINVAL);
2830 } else if (!isdigit(*cp)) {
2831 /*
2832 * It's a user/group name (eg "user") that needs to be
2833 * turned into a uid/gid
2834 */
2835 if (zoned && getzoneid() == GLOBAL_ZONEID)
2836 return (ENOENT);
2837 if (isuser) {
2838 struct passwd *pw;
2839 pw = getpwnam(cp);
2840 if (pw == NULL)
2841 return (ENOENT);
2842 *ridp = pw->pw_uid;
2843 } else {
2844 struct group *gr;
2845 gr = getgrnam(cp);
2846 if (gr == NULL)
2847 return (ENOENT);
2848 *ridp = gr->gr_gid;
2849 }
2850 } else {
2851 /* It's a user/group ID (eg "12345"). */
2852 uid_t id = strtoul(cp, &end, 10);
2853 idmap_rid_t rid;
2854 char *mapdomain;
2855
2856 if (*end != '\0')
2857 return (EINVAL);
2858 if (id > MAXUID) {
2859 /* It's an ephemeral ID. */
2860 if (idmap_id_to_numeric_domain_rid(id, isuser,
2861 &mapdomain, &rid) != 0)
2862 return (ENOENT);
2863 (void) strlcpy(domain, mapdomain, domainlen);
2864 *ridp = rid;
2865 } else {
2866 *ridp = id;
2867 }
2868 }
2869
2870 ASSERT3P(numericsid, ==, NULL);
2871 return (0);
2872 }
2873
2874 static int
2875 zfs_prop_get_userquota_common(zfs_handle_t *zhp, const char *propname,
2876 uint64_t *propvalue, zfs_userquota_prop_t *typep)
2877 {
2878 int err;
2879 zfs_cmd_t zc = { 0 };
2880
2881 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
2882
2883 err = userquota_propname_decode(propname,
2884 zfs_prop_get_int(zhp, ZFS_PROP_ZONED),
2885 typep, zc.zc_value, sizeof (zc.zc_value), &zc.zc_guid);
2886 zc.zc_objset_type = *typep;
2887 if (err)
2888 return (err);
2889
2890 err = ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_USERSPACE_ONE, &zc);
2891 if (err)
2892 return (err);
2893
2894 *propvalue = zc.zc_cookie;
2895 return (0);
2896 }
2897
2898 int
2899 zfs_prop_get_userquota_int(zfs_handle_t *zhp, const char *propname,
2900 uint64_t *propvalue)
2901 {
2902 zfs_userquota_prop_t type;
2903
2904 return (zfs_prop_get_userquota_common(zhp, propname, propvalue,
2905 &type));
2906 }
2907
2908 int
2909 zfs_prop_get_userquota(zfs_handle_t *zhp, const char *propname,
2910 char *propbuf, int proplen, boolean_t literal)
2911 {
2912 int err;
2913 uint64_t propvalue;
2914 zfs_userquota_prop_t type;
2915
2916 err = zfs_prop_get_userquota_common(zhp, propname, &propvalue,
2917 &type);
2918
2919 if (err)
2920 return (err);
2921
2922 if (literal) {
2923 (void) snprintf(propbuf, proplen, "%llu", propvalue);
2924 } else if (propvalue == 0 &&
2925 (type == ZFS_PROP_USERQUOTA || type == ZFS_PROP_GROUPQUOTA)) {
2926 (void) strlcpy(propbuf, "none", proplen);
2927 } else {
2928 zfs_nicenum(propvalue, propbuf, proplen);
2929 }
2930 return (0);
2931 }
2932
2933 int
2934 zfs_prop_get_written_int(zfs_handle_t *zhp, const char *propname,
2935 uint64_t *propvalue)
2936 {
2937 int err;
2938 zfs_cmd_t zc = { 0 };
2939 const char *snapname;
2940
2941 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
2942
2943 snapname = strchr(propname, '@') + 1;
2944 if (strchr(snapname, '@')) {
2945 (void) strlcpy(zc.zc_value, snapname, sizeof (zc.zc_value));
2946 } else {
2947 /* snapname is the short name, append it to zhp's fsname */
2948 char *cp;
2949
2950 (void) strlcpy(zc.zc_value, zhp->zfs_name,
2951 sizeof (zc.zc_value));
2952 cp = strchr(zc.zc_value, '@');
2953 if (cp != NULL)
2954 *cp = '\0';
2955 (void) strlcat(zc.zc_value, "@", sizeof (zc.zc_value));
2956 (void) strlcat(zc.zc_value, snapname, sizeof (zc.zc_value));
2957 }
2958
2959 err = ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_SPACE_WRITTEN, &zc);
2960 if (err)
2961 return (err);
2962
2963 *propvalue = zc.zc_cookie;
2964 return (0);
2965 }
2966
2967 int
2968 zfs_prop_get_written(zfs_handle_t *zhp, const char *propname,
2969 char *propbuf, int proplen, boolean_t literal)
2970 {
2971 int err;
2972 uint64_t propvalue;
2973
2974 err = zfs_prop_get_written_int(zhp, propname, &propvalue);
2975
2976 if (err)
2977 return (err);
2978
2979 if (literal) {
2980 (void) snprintf(propbuf, proplen, "%llu", propvalue);
2981 } else {
2982 zfs_nicenum(propvalue, propbuf, proplen);
2983 }
2984 return (0);
2985 }
2986
2987 /*
2988 * Returns the name of the given zfs handle.
2989 */
2990 const char *
2991 zfs_get_name(const zfs_handle_t *zhp)
2992 {
2993 return (zhp->zfs_name);
2994 }
2995
2996 /*
2997 * Returns the name of the parent pool for the given zfs handle.
2998 */
2999 const char *
3000 zfs_get_pool_name(const zfs_handle_t *zhp)
3001 {
3002 return (zhp->zpool_hdl->zpool_name);
3003 }
3004
3005 /*
3006 * Returns the type of the given zfs handle.
3007 */
3008 zfs_type_t
3009 zfs_get_type(const zfs_handle_t *zhp)
3010 {
3011 return (zhp->zfs_type);
3012 }
3013
3014 /*
3015 * Is one dataset name a child dataset of another?
3016 *
3017 * Needs to handle these cases:
3018 * Dataset 1 "a/foo" "a/foo" "a/foo" "a/foo"
3019 * Dataset 2 "a/fo" "a/foobar" "a/bar/baz" "a/foo/bar"
3020 * Descendant? No. No. No. Yes.
3021 */
3022 static boolean_t
3023 is_descendant(const char *ds1, const char *ds2)
3024 {
3025 size_t d1len = strlen(ds1);
3026
3027 /* ds2 can't be a descendant if it's smaller */
3028 if (strlen(ds2) < d1len)
3029 return (B_FALSE);
3030
3031 /* otherwise, compare strings and verify that there's a '/' char */
3032 return (ds2[d1len] == '/' && (strncmp(ds1, ds2, d1len) == 0));
3033 }
3034
3035 /*
3036 * Given a complete name, return just the portion that refers to the parent.
3037 * Will return -1 if there is no parent (path is just the name of the
3038 * pool).
3039 */
3040 static int
3041 parent_name(const char *path, char *buf, size_t buflen)
3042 {
3043 char *slashp;
3044
3045 (void) strlcpy(buf, path, buflen);
3046
3047 if ((slashp = strrchr(buf, '/')) == NULL)
3048 return (-1);
3049 *slashp = '\0';
3050
3051 return (0);
3052 }
3053
3054 /*
3055 * If accept_ancestor is false, then check to make sure that the given path has
3056 * a parent, and that it exists. If accept_ancestor is true, then find the
3057 * closest existing ancestor for the given path. In prefixlen return the
3058 * length of already existing prefix of the given path. We also fetch the
3059 * 'zoned' property, which is used to validate property settings when creating
3060 * new datasets.
3061 */
3062 static int
3063 check_parents(libzfs_handle_t *hdl, const char *path, uint64_t *zoned,
3064 boolean_t accept_ancestor, int *prefixlen)
3065 {
3066 zfs_cmd_t zc = { 0 };
3067 char parent[ZFS_MAX_DATASET_NAME_LEN];
3068 char *slash;
3069 zfs_handle_t *zhp;
3070 char errbuf[1024];
3071 uint64_t is_zoned;
3072
3073 (void) snprintf(errbuf, sizeof (errbuf),
3074 dgettext(TEXT_DOMAIN, "cannot create '%s'"), path);
3075
3076 /* get parent, and check to see if this is just a pool */
3077 if (parent_name(path, parent, sizeof (parent)) != 0) {
3078 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3079 "missing dataset name"));
3080 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3081 }
3082
3083 /* check to see if the pool exists */
3084 if ((slash = strchr(parent, '/')) == NULL)
3085 slash = parent + strlen(parent);
3086 (void) strncpy(zc.zc_name, parent, slash - parent);
3087 zc.zc_name[slash - parent] = '\0';
3088 if (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_STATS, &zc) != 0 &&
3089 errno == ENOENT) {
3090 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3091 "no such pool '%s'"), zc.zc_name);
3092 return (zfs_error(hdl, EZFS_NOENT, errbuf));
3093 }
3094
3095 /* check to see if the parent dataset exists */
3096 while ((zhp = make_dataset_handle(hdl, parent)) == NULL) {
3097 if (errno == ENOENT && accept_ancestor) {
3098 /*
3099 * Go deeper to find an ancestor, give up on top level.
3100 */
3101 if (parent_name(parent, parent, sizeof (parent)) != 0) {
3102 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3103 "no such pool '%s'"), zc.zc_name);
3104 return (zfs_error(hdl, EZFS_NOENT, errbuf));
3105 }
3106 } else if (errno == ENOENT) {
3107 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3108 "parent does not exist"));
3109 return (zfs_error(hdl, EZFS_NOENT, errbuf));
3110 } else
3111 return (zfs_standard_error(hdl, errno, errbuf));
3112 }
3113
3114 is_zoned = zfs_prop_get_int(zhp, ZFS_PROP_ZONED);
3115 if (zoned != NULL)
3116 *zoned = is_zoned;
3117
3118 /* we are in a non-global zone, but parent is in the global zone */
3119 if (getzoneid() != GLOBAL_ZONEID && !is_zoned) {
3120 (void) zfs_standard_error(hdl, EPERM, errbuf);
3121 zfs_close(zhp);
3122 return (-1);
3123 }
3124
3125 /* make sure parent is a filesystem */
3126 if (zfs_get_type(zhp) != ZFS_TYPE_FILESYSTEM) {
3127 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3128 "parent is not a filesystem"));
3129 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
3130 zfs_close(zhp);
3131 return (-1);
3132 }
3133
3134 zfs_close(zhp);
3135 if (prefixlen != NULL)
3136 *prefixlen = strlen(parent);
3137 return (0);
3138 }
3139
3140 /*
3141 * Finds whether the dataset of the given type(s) exists.
3142 */
3143 boolean_t
3144 zfs_dataset_exists(libzfs_handle_t *hdl, const char *path, zfs_type_t types)
3145 {
3146 zfs_handle_t *zhp;
3147
3148 if (!zfs_validate_name(hdl, path, types, B_FALSE))
3149 return (B_FALSE);
3150
3151 /*
3152 * Try to get stats for the dataset, which will tell us if it exists.
3153 */
3154 if ((zhp = make_dataset_handle(hdl, path)) != NULL) {
3155 int ds_type = zhp->zfs_type;
3156
3157 zfs_close(zhp);
3158 if (types & ds_type)
3159 return (B_TRUE);
3160 }
3161 return (B_FALSE);
3162 }
3163
3164 /*
3165 * Given a path to 'target', create all the ancestors between
3166 * the prefixlen portion of the path, and the target itself.
3167 * Fail if the initial prefixlen-ancestor does not already exist.
3168 */
3169 int
3170 create_parents(libzfs_handle_t *hdl, char *target, int prefixlen)
3171 {
3172 zfs_handle_t *h;
3173 char *cp;
3174 const char *opname;
3175
3176 /* make sure prefix exists */
3177 cp = target + prefixlen;
3178 if (*cp != '/') {
3179 assert(strchr(cp, '/') == NULL);
3180 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM);
3181 } else {
3182 *cp = '\0';
3183 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM);
3184 *cp = '/';
3185 }
3186 if (h == NULL)
3187 return (-1);
3188 zfs_close(h);
3189
3190 /*
3191 * Attempt to create, mount, and share any ancestor filesystems,
3192 * up to the prefixlen-long one.
3193 */
3194 for (cp = target + prefixlen + 1;
3195 (cp = strchr(cp, '/')) != NULL; *cp = '/', cp++) {
3196
3197 *cp = '\0';
3198
3199 h = make_dataset_handle(hdl, target);
3200 if (h) {
3201 /* it already exists, nothing to do here */
3202 zfs_close(h);
3203 continue;
3204 }
3205
3206 if (zfs_create(hdl, target, ZFS_TYPE_FILESYSTEM,
3207 NULL) != 0) {
3208 opname = dgettext(TEXT_DOMAIN, "create");
3209 goto ancestorerr;
3210 }
3211
3212 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM);
3213 if (h == NULL) {
3214 opname = dgettext(TEXT_DOMAIN, "open");
3215 goto ancestorerr;
3216 }
3217
3218 if (zfs_mount(h, NULL, 0) != 0) {
3219 opname = dgettext(TEXT_DOMAIN, "mount");
3220 goto ancestorerr;
3221 }
3222
3223 if (zfs_share(h) != 0) {
3224 opname = dgettext(TEXT_DOMAIN, "share");
3225 goto ancestorerr;
3226 }
3227
3228 zfs_close(h);
3229 }
3230
3231 return (0);
3232
3233 ancestorerr:
3234 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3235 "failed to %s ancestor '%s'"), opname, target);
3236 return (-1);
3237 }
3238
3239 /*
3240 * Creates non-existing ancestors of the given path.
3241 */
3242 int
3243 zfs_create_ancestors(libzfs_handle_t *hdl, const char *path)
3244 {
3245 int prefix;
3246 char *path_copy;
3247 int rc = 0;
3248
3249 if (check_parents(hdl, path, NULL, B_TRUE, &prefix) != 0)
3250 return (-1);
3251
3252 if ((path_copy = strdup(path)) != NULL) {
3253 rc = create_parents(hdl, path_copy, prefix);
3254 free(path_copy);
3255 }
3256 if (path_copy == NULL || rc != 0)
3257 return (-1);
3258
3259 return (0);
3260 }
3261
3262 /*
3263 * Create a new filesystem or volume.
3264 */
3265 int
3266 zfs_create(libzfs_handle_t *hdl, const char *path, zfs_type_t type,
3267 nvlist_t *props)
3268 {
3269 int ret;
3270 uint64_t size = 0;
3271 uint64_t blocksize = zfs_prop_default_numeric(ZFS_PROP_VOLBLOCKSIZE);
3272 char errbuf[1024];
3273 uint64_t zoned;
3274 enum lzc_dataset_type ost;
3275 zpool_handle_t *zpool_handle;
3276
3277 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3278 "cannot create '%s'"), path);
3279
3280 /* validate the path, taking care to note the extended error message */
3281 if (!zfs_validate_name(hdl, path, type, B_TRUE))
3282 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3283
3284 /* validate parents exist */
3285 if (check_parents(hdl, path, &zoned, B_FALSE, NULL) != 0)
3286 return (-1);
3287
3288 /*
3289 * The failure modes when creating a dataset of a different type over
3290 * one that already exists is a little strange. In particular, if you
3291 * try to create a dataset on top of an existing dataset, the ioctl()
3292 * will return ENOENT, not EEXIST. To prevent this from happening, we
3293 * first try to see if the dataset exists.
3294 */
3295 if (zfs_dataset_exists(hdl, path, ZFS_TYPE_DATASET)) {
3296 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3297 "dataset already exists"));
3298 return (zfs_error(hdl, EZFS_EXISTS, errbuf));
3299 }
3300
3301 if (type == ZFS_TYPE_VOLUME)
3302 ost = LZC_DATSET_TYPE_ZVOL;
3303 else
3304 ost = LZC_DATSET_TYPE_ZFS;
3305
3306 /* open zpool handle for prop validation */
3307 char pool_path[ZFS_MAX_DATASET_NAME_LEN];
3308 (void) strlcpy(pool_path, path, sizeof (pool_path));
3309
3310 /* truncate pool_path at first slash */
3311 char *p = strchr(pool_path, '/');
3312 if (p != NULL)
3313 *p = '\0';
3314
3315 if ((zpool_handle = zpool_open(hdl, pool_path)) == NULL)
3316 return (-1);
3317
3318 if (props && (props = zfs_valid_proplist(hdl, type, props,
3319 zoned, NULL, zpool_handle, errbuf)) == 0) {
3320 zpool_close(zpool_handle);
3321 return (-1);
3322 }
3323 zpool_close(zpool_handle);
3324
3325 if (type == ZFS_TYPE_VOLUME) {
3326 /*
3327 * If we are creating a volume, the size and block size must
3328 * satisfy a few restraints. First, the blocksize must be a
3329 * valid block size between SPA_{MIN,MAX}BLOCKSIZE. Second, the
3330 * volsize must be a multiple of the block size, and cannot be
3331 * zero.
3332 */
3333 if (props == NULL || nvlist_lookup_uint64(props,
3334 zfs_prop_to_name(ZFS_PROP_VOLSIZE), &size) != 0) {
3335 nvlist_free(props);
3336 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3337 "missing volume size"));
3338 return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3339 }
3340
3341 if ((ret = nvlist_lookup_uint64(props,
3342 zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
3343 &blocksize)) != 0) {
3344 if (ret == ENOENT) {
3345 blocksize = zfs_prop_default_numeric(
3346 ZFS_PROP_VOLBLOCKSIZE);
3347 } else {
3348 nvlist_free(props);
3349 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3350 "missing volume block size"));
3351 return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3352 }
3353 }
3354
3355 if (size == 0) {
3356 nvlist_free(props);
3357 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3358 "volume size cannot be zero"));
3359 return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3360 }
3361
3362 if (size % blocksize != 0) {
3363 nvlist_free(props);
3364 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3365 "volume size must be a multiple of volume block "
3366 "size"));
3367 return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3368 }
3369 }
3370
3371 /* create the dataset */
3372 ret = lzc_create(path, ost, props);
3373 nvlist_free(props);
3374
3375 /* check for failure */
3376 if (ret != 0) {
3377 char parent[ZFS_MAX_DATASET_NAME_LEN];
3378 (void) parent_name(path, parent, sizeof (parent));
3379
3380 switch (errno) {
3381 case ENOENT:
3382 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3383 "no such parent '%s'"), parent);
3384 return (zfs_error(hdl, EZFS_NOENT, errbuf));
3385
3386 case EINVAL:
3387 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3388 "parent '%s' is not a filesystem"), parent);
3389 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
3390
3391 case ENOTSUP:
3392 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3393 "pool must be upgraded to set this "
3394 "property or value"));
3395 return (zfs_error(hdl, EZFS_BADVERSION, errbuf));
3396 #ifdef _ILP32
3397 case EOVERFLOW:
3398 /*
3399 * This platform can't address a volume this big.
3400 */
3401 if (type == ZFS_TYPE_VOLUME)
3402 return (zfs_error(hdl, EZFS_VOLTOOBIG,
3403 errbuf));
3404 #endif
3405 /* FALLTHROUGH */
3406 default:
3407 return (zfs_standard_error(hdl, errno, errbuf));
3408 }
3409 }
3410
3411 return (0);
3412 }
3413
3414 /*
3415 * Destroys the given dataset. The caller must make sure that the filesystem
3416 * isn't mounted, and that there are no active dependents. If the file system
3417 * does not exist this function does nothing.
3418 */
3419 int
3420 zfs_destroy(zfs_handle_t *zhp, boolean_t defer)
3421 {
3422 zfs_cmd_t zc = { 0 };
3423
3424 if (zhp->zfs_type == ZFS_TYPE_BOOKMARK) {
3425 nvlist_t *nv = fnvlist_alloc();
3426 fnvlist_add_boolean(nv, zhp->zfs_name);
3427 int error = lzc_destroy_bookmarks(nv, NULL);
3428 fnvlist_free(nv);
3429 if (error != 0) {
3430 return (zfs_standard_error_fmt(zhp->zfs_hdl, errno,
3431 dgettext(TEXT_DOMAIN, "cannot destroy '%s'"),
3432 zhp->zfs_name));
3433 }
3434 return (0);
3435 }
3436
3437 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
3438
3439 if (ZFS_IS_VOLUME(zhp)) {
3440 zc.zc_objset_type = DMU_OST_ZVOL;
3441 } else {
3442 zc.zc_objset_type = DMU_OST_ZFS;
3443 }
3444
3445 zc.zc_defer_destroy = defer;
3446 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_DESTROY, &zc) != 0 &&
3447 errno != ENOENT) {
3448 return (zfs_standard_error_fmt(zhp->zfs_hdl, errno,
3449 dgettext(TEXT_DOMAIN, "cannot destroy '%s'"),
3450 zhp->zfs_name));
3451 }
3452
3453 remove_mountpoint(zhp);
3454
3455 return (0);
3456 }
3457
3458 struct destroydata {
3459 nvlist_t *nvl;
3460 const char *snapname;
3461 };
3462
3463 static int
3464 zfs_check_snap_cb(zfs_handle_t *zhp, void *arg)
3465 {
3466 struct destroydata *dd = arg;
3467 char name[ZFS_MAX_DATASET_NAME_LEN];
3468 int rv = 0;
3469
3470 (void) snprintf(name, sizeof (name),
3471 "%s@%s", zhp->zfs_name, dd->snapname);
3472
3473 if (lzc_exists(name))
3474 verify(nvlist_add_boolean(dd->nvl, name) == 0);
3475
3476 rv = zfs_iter_filesystems(zhp, zfs_check_snap_cb, dd);
3477 zfs_close(zhp);
3478 return (rv);
3479 }
3480
3481 /*
3482 * Destroys all snapshots with the given name in zhp & descendants.
3483 */
3484 int
3485 zfs_destroy_snaps(zfs_handle_t *zhp, char *snapname, boolean_t defer)
3486 {
3487 int ret;
3488 struct destroydata dd = { 0 };
3489
3490 dd.snapname = snapname;
3491 verify(nvlist_alloc(&dd.nvl, NV_UNIQUE_NAME, 0) == 0);
3492 (void) zfs_check_snap_cb(zfs_handle_dup(zhp), &dd);
3493
3494 if (nvlist_empty(dd.nvl)) {
3495 ret = zfs_standard_error_fmt(zhp->zfs_hdl, ENOENT,
3496 dgettext(TEXT_DOMAIN, "cannot destroy '%s@%s'"),
3497 zhp->zfs_name, snapname);
3498 } else {
3499 ret = zfs_destroy_snaps_nvl(zhp->zfs_hdl, dd.nvl, defer);
3500 }
3501 nvlist_free(dd.nvl);
3502 return (ret);
3503 }
3504
3505 /*
3506 * Destroys all the snapshots named in the nvlist.
3507 */
3508 int
3509 zfs_destroy_snaps_nvl(libzfs_handle_t *hdl, nvlist_t *snaps, boolean_t defer)
3510 {
3511 int ret;
3512 nvlist_t *errlist = NULL;
3513
3514 ret = lzc_destroy_snaps(snaps, defer, &errlist);
3515
3516 if (ret == 0) {
3517 nvlist_free(errlist);
3518 return (0);
3519 }
3520
3521 if (nvlist_empty(errlist)) {
3522 char errbuf[1024];
3523 (void) snprintf(errbuf, sizeof (errbuf),
3524 dgettext(TEXT_DOMAIN, "cannot destroy snapshots"));
3525
3526 ret = zfs_standard_error(hdl, ret, errbuf);
3527 }
3528 for (nvpair_t *pair = nvlist_next_nvpair(errlist, NULL);
3529 pair != NULL; pair = nvlist_next_nvpair(errlist, pair)) {
3530 char errbuf[1024];
3531 (void) snprintf(errbuf, sizeof (errbuf),
3532 dgettext(TEXT_DOMAIN, "cannot destroy snapshot %s"),
3533 nvpair_name(pair));
3534
3535 switch (fnvpair_value_int32(pair)) {
3536 case EEXIST:
3537 zfs_error_aux(hdl,
3538 dgettext(TEXT_DOMAIN, "snapshot is cloned"));
3539 ret = zfs_error(hdl, EZFS_EXISTS, errbuf);
3540 break;
3541 default:
3542 ret = zfs_standard_error(hdl, errno, errbuf);
3543 break;
3544 }
3545 }
3546
3547 nvlist_free(errlist);
3548 return (ret);
3549 }
3550
3551 /*
3552 * Clones the given dataset. The target must be of the same type as the source.
3553 */
3554 int
3555 zfs_clone(zfs_handle_t *zhp, const char *target, nvlist_t *props)
3556 {
3557 char parent[ZFS_MAX_DATASET_NAME_LEN];
3558 int ret;
3559 char errbuf[1024];
3560 libzfs_handle_t *hdl = zhp->zfs_hdl;
3561 uint64_t zoned;
3562
3563 assert(zhp->zfs_type == ZFS_TYPE_SNAPSHOT);
3564
3565 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3566 "cannot create '%s'"), target);
3567
3568 /* validate the target/clone name */
3569 if (!zfs_validate_name(hdl, target, ZFS_TYPE_FILESYSTEM, B_TRUE))
3570 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3571
3572 /* validate parents exist */
3573 if (check_parents(hdl, target, &zoned, B_FALSE, NULL) != 0)
3574 return (-1);
3575
3576 (void) parent_name(target, parent, sizeof (parent));
3577
3578 /* do the clone */
3579
3580 if (props) {
3581 zfs_type_t type;
3582 if (ZFS_IS_VOLUME(zhp)) {
3583 type = ZFS_TYPE_VOLUME;
3584 } else {
3585 type = ZFS_TYPE_FILESYSTEM;
3586 }
3587 if ((props = zfs_valid_proplist(hdl, type, props, zoned,
3588 zhp, zhp->zpool_hdl, errbuf)) == NULL)
3589 return (-1);
3590 }
3591
3592 ret = lzc_clone(target, zhp->zfs_name, props);
3593 nvlist_free(props);
3594
3595 if (ret != 0) {
3596 switch (errno) {
3597
3598 case ENOENT:
3599 /*
3600 * The parent doesn't exist. We should have caught this
3601 * above, but there may a race condition that has since
3602 * destroyed the parent.
3603 *
3604 * At this point, we don't know whether it's the source
3605 * that doesn't exist anymore, or whether the target
3606 * dataset doesn't exist.
3607 */
3608 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
3609 "no such parent '%s'"), parent);
3610 return (zfs_error(zhp->zfs_hdl, EZFS_NOENT, errbuf));
3611
3612 case EXDEV:
3613 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
3614 "source and target pools differ"));
3615 return (zfs_error(zhp->zfs_hdl, EZFS_CROSSTARGET,
3616 errbuf));
3617
3618 default:
3619 return (zfs_standard_error(zhp->zfs_hdl, errno,
3620 errbuf));
3621 }
3622 }
3623
3624 return (ret);
3625 }
3626
3627 /*
3628 * Promotes the given clone fs to be the clone parent.
3629 */
3630 int
3631 zfs_promote(zfs_handle_t *zhp)
3632 {
3633 libzfs_handle_t *hdl = zhp->zfs_hdl;
3634 char snapname[ZFS_MAX_DATASET_NAME_LEN];
3635 int ret;
3636 char errbuf[1024];
3637
3638 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3639 "cannot promote '%s'"), zhp->zfs_name);
3640
3641 if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) {
3642 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3643 "snapshots can not be promoted"));
3644 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
3645 }
3646
3647 if (zhp->zfs_dmustats.dds_origin[0] == '\0') {
3648 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3649 "not a cloned filesystem"));
3650 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
3651 }
3652
3653 ret = lzc_promote(zhp->zfs_name, snapname, sizeof (snapname));
3654
3655 if (ret != 0) {
3656 switch (ret) {
3657 case EEXIST:
3658 /* There is a conflicting snapshot name. */
3659 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3660 "conflicting snapshot '%s' from parent '%s'"),
3661 snapname, zhp->zfs_dmustats.dds_origin);
3662 return (zfs_error(hdl, EZFS_EXISTS, errbuf));
3663
3664 default:
3665 return (zfs_standard_error(hdl, ret, errbuf));
3666 }
3667 }
3668 return (ret);
3669 }
3670
3671 typedef struct snapdata {
3672 nvlist_t *sd_nvl;
3673 const char *sd_snapname;
3674 } snapdata_t;
3675
3676 static int
3677 zfs_snapshot_cb(zfs_handle_t *zhp, void *arg)
3678 {
3679 snapdata_t *sd = arg;
3680 char name[ZFS_MAX_DATASET_NAME_LEN];
3681 int rv = 0;
3682
3683 if (zfs_prop_get_int(zhp, ZFS_PROP_INCONSISTENT) == 0) {
3684 (void) snprintf(name, sizeof (name),
3685 "%s@%s", zfs_get_name(zhp), sd->sd_snapname);
3686
3687 fnvlist_add_boolean(sd->sd_nvl, name);
3688
3689 rv = zfs_iter_filesystems(zhp, zfs_snapshot_cb, sd);
3690 }
3691 zfs_close(zhp);
3692
3693 return (rv);
3694 }
3695
3696 /*
3697 * Creates snapshots. The keys in the snaps nvlist are the snapshots to be
3698 * created.
3699 */
3700 int
3701 zfs_snapshot_nvl(libzfs_handle_t *hdl, nvlist_t *snaps, nvlist_t *props)
3702 {
3703 int ret;
3704 char errbuf[1024];
3705 nvpair_t *elem;
3706 nvlist_t *errors;
3707
3708 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3709 "cannot create snapshots "));
3710
3711 elem = NULL;
3712 while ((elem = nvlist_next_nvpair(snaps, elem)) != NULL) {
3713 const char *snapname = nvpair_name(elem);
3714
3715 /* validate the target name */
3716 if (!zfs_validate_name(hdl, snapname, ZFS_TYPE_SNAPSHOT,
3717 B_TRUE)) {
3718 (void) snprintf(errbuf, sizeof (errbuf),
3719 dgettext(TEXT_DOMAIN,
3720 "cannot create snapshot '%s'"), snapname);
3721 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3722 }
3723 }
3724
3725 /*
3726 * get pool handle for prop validation. assumes all snaps are in the
3727 * same pool, as does lzc_snapshot (below).
3728 */
3729 char pool[ZFS_MAX_DATASET_NAME_LEN];
3730 elem = nvlist_next_nvpair(snaps, NULL);
3731 (void) strlcpy(pool, nvpair_name(elem), sizeof (pool));
3732 pool[strcspn(pool, "/@")] = '\0';
3733 zpool_handle_t *zpool_hdl = zpool_open(hdl, pool);
3734
3735 if (props != NULL &&
3736 (props = zfs_valid_proplist(hdl, ZFS_TYPE_SNAPSHOT,
3737 props, B_FALSE, NULL, zpool_hdl, errbuf)) == NULL) {
3738 zpool_close(zpool_hdl);
3739 return (-1);
3740 }
3741 zpool_close(zpool_hdl);
3742
3743 ret = lzc_snapshot(snaps, props, &errors);
3744
3745 if (ret != 0) {
3746 boolean_t printed = B_FALSE;
3747 for (elem = nvlist_next_nvpair(errors, NULL);
3748 elem != NULL;
3749 elem = nvlist_next_nvpair(errors, elem)) {
3750 (void) snprintf(errbuf, sizeof (errbuf),
3751 dgettext(TEXT_DOMAIN,
3752 "cannot create snapshot '%s'"), nvpair_name(elem));
3753 (void) zfs_standard_error(hdl,
3754 fnvpair_value_int32(elem), errbuf);
3755 printed = B_TRUE;
3756 }
3757 if (!printed) {
3758 switch (ret) {
3759 case EXDEV:
3760 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3761 "multiple snapshots of same "
3762 "fs not allowed"));
3763 (void) zfs_error(hdl, EZFS_EXISTS, errbuf);
3764
3765 break;
3766 default:
3767 (void) zfs_standard_error(hdl, ret, errbuf);
3768 }
3769 }
3770 }
3771
3772 nvlist_free(props);
3773 nvlist_free(errors);
3774 return (ret);
3775 }
3776
3777 int
3778 zfs_snapshot(libzfs_handle_t *hdl, const char *path, boolean_t recursive,
3779 nvlist_t *props)
3780 {
3781 int ret;
3782 snapdata_t sd = { 0 };
3783 char fsname[ZFS_MAX_DATASET_NAME_LEN];
3784 char *cp;
3785 zfs_handle_t *zhp;
3786 char errbuf[1024];
3787
3788 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3789 "cannot snapshot %s"), path);
3790
3791 if (!zfs_validate_name(hdl, path, ZFS_TYPE_SNAPSHOT, B_TRUE))
3792 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3793
3794 (void) strlcpy(fsname, path, sizeof (fsname));
3795 cp = strchr(fsname, '@');
3796 *cp = '\0';
3797 sd.sd_snapname = cp + 1;
3798
3799 if ((zhp = zfs_open(hdl, fsname, ZFS_TYPE_FILESYSTEM |
3800 ZFS_TYPE_VOLUME)) == NULL) {
3801 return (-1);
3802 }
3803
3804 verify(nvlist_alloc(&sd.sd_nvl, NV_UNIQUE_NAME, 0) == 0);
3805 if (recursive) {
3806 (void) zfs_snapshot_cb(zfs_handle_dup(zhp), &sd);
3807 } else {
3808 fnvlist_add_boolean(sd.sd_nvl, path);
3809 }
3810
3811 ret = zfs_snapshot_nvl(hdl, sd.sd_nvl, props);
3812 nvlist_free(sd.sd_nvl);
3813 zfs_close(zhp);
3814 return (ret);
3815 }
3816
3817 /*
3818 * Destroy any more recent snapshots. We invoke this callback on any dependents
3819 * of the snapshot first. If the 'cb_dependent' member is non-zero, then this
3820 * is a dependent and we should just destroy it without checking the transaction
3821 * group.
3822 */
3823 typedef struct rollback_data {
3824 const char *cb_target; /* the snapshot */
3825 uint64_t cb_create; /* creation time reference */
3826 boolean_t cb_error;
3827 boolean_t cb_force;
3828 } rollback_data_t;
3829
3830 static int
3831 rollback_destroy_dependent(zfs_handle_t *zhp, void *data)
3832 {
3833 rollback_data_t *cbp = data;
3834 prop_changelist_t *clp;
3835
3836 /* We must destroy this clone; first unmount it */
3837 clp = changelist_gather(zhp, ZFS_PROP_NAME, 0,
3838 cbp->cb_force ? MS_FORCE: 0);
3839 if (clp == NULL || changelist_prefix(clp) != 0) {
3840 cbp->cb_error = B_TRUE;
3841 zfs_close(zhp);
3842 return (0);
3843 }
3844 if (zfs_destroy(zhp, B_FALSE) != 0)
3845 cbp->cb_error = B_TRUE;
3846 else
3847 changelist_remove(clp, zhp->zfs_name);
3848 (void) changelist_postfix(clp);
3849 changelist_free(clp);
3850
3851 zfs_close(zhp);
3852 return (0);
3853 }
3854
3855 static int
3856 rollback_destroy(zfs_handle_t *zhp, void *data)
3857 {
3858 rollback_data_t *cbp = data;
3859
3860 if (zfs_prop_get_int(zhp, ZFS_PROP_CREATETXG) > cbp->cb_create) {
3861 cbp->cb_error |= zfs_iter_dependents(zhp, B_FALSE,
3862 rollback_destroy_dependent, cbp);
3863
3864 cbp->cb_error |= zfs_destroy(zhp, B_FALSE);
3865 }
3866
3867 zfs_close(zhp);
3868 return (0);
3869 }
3870
3871 /*
3872 * Given a dataset, rollback to a specific snapshot, discarding any
3873 * data changes since then and making it the active dataset.
3874 *
3875 * Any snapshots and bookmarks more recent than the target are
3876 * destroyed, along with their dependents (i.e. clones).
3877 */
3878 int
3879 zfs_rollback(zfs_handle_t *zhp, zfs_handle_t *snap, boolean_t force)
3880 {
3881 rollback_data_t cb = { 0 };
3882 int err;
3883 boolean_t restore_resv = 0;
3884 uint64_t old_volsize = 0, new_volsize;
3885 zfs_prop_t resv_prop;
3886
3887 assert(zhp->zfs_type == ZFS_TYPE_FILESYSTEM ||
3888 zhp->zfs_type == ZFS_TYPE_VOLUME);
3889
3890 /*
3891 * Destroy all recent snapshots and their dependents.
3892 */
3893 cb.cb_force = force;
3894 cb.cb_target = snap->zfs_name;
3895 cb.cb_create = zfs_prop_get_int(snap, ZFS_PROP_CREATETXG);
3896 (void) zfs_iter_snapshots(zhp, B_FALSE, rollback_destroy, &cb);
3897 (void) zfs_iter_bookmarks(zhp, rollback_destroy, &cb);
3898
3899 if (cb.cb_error)
3900 return (-1);
3901
3902 /*
3903 * Now that we have verified that the snapshot is the latest,
3904 * rollback to the given snapshot.
3905 */
3906
3907 if (zhp->zfs_type == ZFS_TYPE_VOLUME) {
3908 if (zfs_which_resv_prop(zhp, &resv_prop) < 0)
3909 return (-1);
3910 old_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE);
3911 restore_resv =
3912 (old_volsize == zfs_prop_get_int(zhp, resv_prop));
3913 }
3914
3915 /*
3916 * We rely on zfs_iter_children() to verify that there are no
3917 * newer snapshots for the given dataset. Therefore, we can
3918 * simply pass the name on to the ioctl() call. There is still
3919 * an unlikely race condition where the user has taken a
3920 * snapshot since we verified that this was the most recent.
3921 */
3922 err = lzc_rollback(zhp->zfs_name, NULL, 0);
3923 if (err != 0) {
3924 (void) zfs_standard_error_fmt(zhp->zfs_hdl, errno,
3925 dgettext(TEXT_DOMAIN, "cannot rollback '%s'"),
3926 zhp->zfs_name);
3927 return (err);
3928 }
3929
3930 /*
3931 * For volumes, if the pre-rollback volsize matched the pre-
3932 * rollback reservation and the volsize has changed then set
3933 * the reservation property to the post-rollback volsize.
3934 * Make a new handle since the rollback closed the dataset.
3935 */
3936 if ((zhp->zfs_type == ZFS_TYPE_VOLUME) &&
3937 (zhp = make_dataset_handle(zhp->zfs_hdl, zhp->zfs_name))) {
3938 if (restore_resv) {
3939 new_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE);
3940 if (old_volsize != new_volsize)
3941 err = zfs_prop_set_int(zhp, resv_prop,
3942 new_volsize);
3943 }
3944 zfs_close(zhp);
3945 }
3946 return (err);
3947 }
3948
3949 /*
3950 * Renames the given dataset.
3951 */
3952 int
3953 zfs_rename(zfs_handle_t *zhp, const char *target, boolean_t recursive,
3954 boolean_t force_unmount)
3955 {
3956 int ret = 0;
3957 zfs_cmd_t zc = { 0 };
3958 char *delim;
3959 prop_changelist_t *cl = NULL;
3960 zfs_handle_t *zhrp = NULL;
3961 char *parentname = NULL;
3962 char parent[ZFS_MAX_DATASET_NAME_LEN];
3963 libzfs_handle_t *hdl = zhp->zfs_hdl;
3964 char errbuf[1024];
3965
3966 /* if we have the same exact name, just return success */
3967 if (strcmp(zhp->zfs_name, target) == 0)
3968 return (0);
3969
3970 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3971 "cannot rename to '%s'"), target);
3972
3973 /*
3974 * Make sure the target name is valid
3975 */
3976 if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) {
3977 if ((strchr(target, '@') == NULL) ||
3978 *target == '@') {
3979 /*
3980 * Snapshot target name is abbreviated,
3981 * reconstruct full dataset name
3982 */
3983 (void) strlcpy(parent, zhp->zfs_name,
3984 sizeof (parent));
3985 delim = strchr(parent, '@');
3986 if (strchr(target, '@') == NULL)
3987 *(++delim) = '\0';
3988 else
3989 *delim = '\0';
3990 (void) strlcat(parent, target, sizeof (parent));
3991 target = parent;
3992 } else {
3993 /*
3994 * Make sure we're renaming within the same dataset.
3995 */
3996 delim = strchr(target, '@');
3997 if (strncmp(zhp->zfs_name, target, delim - target)
3998 != 0 || zhp->zfs_name[delim - target] != '@') {
3999 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4000 "snapshots must be part of same "
4001 "dataset"));
4002 return (zfs_error(hdl, EZFS_CROSSTARGET,
4003 errbuf));
4004 }
4005 }
4006 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE))
4007 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
4008 } else {
4009 if (recursive) {
4010 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4011 "recursive rename must be a snapshot"));
4012 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
4013 }
4014
4015 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE))
4016 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
4017
4018 /* validate parents */
4019 if (check_parents(hdl, target, NULL, B_FALSE, NULL) != 0)
4020 return (-1);
4021
4022 /* make sure we're in the same pool */
4023 verify((delim = strchr(target, '/')) != NULL);
4024 if (strncmp(zhp->zfs_name, target, delim - target) != 0 ||
4025 zhp->zfs_name[delim - target] != '/') {
4026 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4027 "datasets must be within same pool"));
4028 return (zfs_error(hdl, EZFS_CROSSTARGET, errbuf));
4029 }
4030
4031 /* new name cannot be a child of the current dataset name */
4032 if (is_descendant(zhp->zfs_name, target)) {
4033 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4034 "New dataset name cannot be a descendant of "
4035 "current dataset name"));
4036 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
4037 }
4038 }
4039
4040 (void) snprintf(errbuf, sizeof (errbuf),
4041 dgettext(TEXT_DOMAIN, "cannot rename '%s'"), zhp->zfs_name);
4042
4043 if (getzoneid() == GLOBAL_ZONEID &&
4044 zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) {
4045 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4046 "dataset is used in a non-global zone"));
4047 return (zfs_error(hdl, EZFS_ZONED, errbuf));
4048 }
4049
4050 if (recursive) {
4051 parentname = zfs_strdup(zhp->zfs_hdl, zhp->zfs_name);
4052 if (parentname == NULL) {
4053 ret = -1;
4054 goto error;
4055 }
4056 delim = strchr(parentname, '@');
4057 *delim = '\0';
4058 zhrp = zfs_open(zhp->zfs_hdl, parentname, ZFS_TYPE_DATASET);
4059 if (zhrp == NULL) {
4060 ret = -1;
4061 goto error;
4062 }
4063 } else if (zhp->zfs_type != ZFS_TYPE_SNAPSHOT) {
4064 if ((cl = changelist_gather(zhp, ZFS_PROP_NAME, 0,
4065 force_unmount ? MS_FORCE : 0)) == NULL)
4066 return (-1);
4067
4068 if (changelist_haszonedchild(cl)) {
4069 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4070 "child dataset with inherited mountpoint is used "
4071 "in a non-global zone"));
4072 (void) zfs_error(hdl, EZFS_ZONED, errbuf);
4073 ret = -1;
4074 goto error;
4075 }
4076
4077 if ((ret = changelist_prefix(cl)) != 0)
4078 goto error;
4079 }
4080
4081 if (ZFS_IS_VOLUME(zhp))
4082 zc.zc_objset_type = DMU_OST_ZVOL;
4083 else
4084 zc.zc_objset_type = DMU_OST_ZFS;
4085
4086 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
4087 (void) strlcpy(zc.zc_value, target, sizeof (zc.zc_value));
4088
4089 zc.zc_cookie = recursive;
4090
4091 if ((ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_RENAME, &zc)) != 0) {
4092 /*
4093 * if it was recursive, the one that actually failed will
4094 * be in zc.zc_name
4095 */
4096 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
4097 "cannot rename '%s'"), zc.zc_name);
4098
4099 if (recursive && errno == EEXIST) {
4100 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4101 "a child dataset already has a snapshot "
4102 "with the new name"));
4103 (void) zfs_error(hdl, EZFS_EXISTS, errbuf);
4104 } else {
4105 (void) zfs_standard_error(zhp->zfs_hdl, errno, errbuf);
4106 }
4107
4108 /*
4109 * On failure, we still want to remount any filesystems that
4110 * were previously mounted, so we don't alter the system state.
4111 */
4112 if (cl != NULL)
4113 (void) changelist_postfix(cl);
4114 } else {
4115 if (cl != NULL) {
4116 changelist_rename(cl, zfs_get_name(zhp), target);
4117 ret = changelist_postfix(cl);
4118 }
4119 }
4120
4121 error:
4122 if (parentname != NULL) {
4123 free(parentname);
4124 }
4125 if (zhrp != NULL) {
4126 zfs_close(zhrp);
4127 }
4128 if (cl != NULL) {
4129 changelist_free(cl);
4130 }
4131 return (ret);
4132 }
4133
4134 nvlist_t *
4135 zfs_get_user_props(zfs_handle_t *zhp)
4136 {
4137 return (zhp->zfs_user_props);
4138 }
4139
4140 nvlist_t *
4141 zfs_get_recvd_props(zfs_handle_t *zhp)
4142 {
4143 if (zhp->zfs_recvd_props == NULL)
4144 if (get_recvd_props_ioctl(zhp) != 0)
4145 return (NULL);
4146 return (zhp->zfs_recvd_props);
4147 }
4148
4149 /*
4150 * This function is used by 'zfs list' to determine the exact set of columns to
4151 * display, and their maximum widths. This does two main things:
4152 *
4153 * - If this is a list of all properties, then expand the list to include
4154 * all native properties, and set a flag so that for each dataset we look
4155 * for new unique user properties and add them to the list.
4156 *
4157 * - For non fixed-width properties, keep track of the maximum width seen
4158 * so that we can size the column appropriately. If the user has
4159 * requested received property values, we also need to compute the width
4160 * of the RECEIVED column.
4161 */
4162 int
4163 zfs_expand_proplist(zfs_handle_t *zhp, zprop_list_t **plp, boolean_t received,
4164 boolean_t literal)
4165 {
4166 libzfs_handle_t *hdl = zhp->zfs_hdl;
4167 zprop_list_t *entry;
4168 zprop_list_t **last, **start;
4169 nvlist_t *userprops, *propval;
4170 nvpair_t *elem;
4171 char *strval;
4172 char buf[ZFS_MAXPROPLEN];
4173
4174 if (zprop_expand_list(hdl, plp, ZFS_TYPE_DATASET) != 0)
4175 return (-1);
4176
4177 userprops = zfs_get_user_props(zhp);
4178
4179 entry = *plp;
4180 if (entry->pl_all && nvlist_next_nvpair(userprops, NULL) != NULL) {
4181 /*
4182 * Go through and add any user properties as necessary. We
4183 * start by incrementing our list pointer to the first
4184 * non-native property.
4185 */
4186 start = plp;
4187 while (*start != NULL) {
4188 if ((*start)->pl_prop == ZPROP_INVAL)
4189 break;
4190 start = &(*start)->pl_next;
4191 }
4192
4193 elem = NULL;
4194 while ((elem = nvlist_next_nvpair(userprops, elem)) != NULL) {
4195 /*
4196 * See if we've already found this property in our list.
4197 */
4198 for (last = start; *last != NULL;
4199 last = &(*last)->pl_next) {
4200 if (strcmp((*last)->pl_user_prop,
4201 nvpair_name(elem)) == 0)
4202 break;
4203 }
4204
4205 if (*last == NULL) {
4206 if ((entry = zfs_alloc(hdl,
4207 sizeof (zprop_list_t))) == NULL ||
4208 ((entry->pl_user_prop = zfs_strdup(hdl,
4209 nvpair_name(elem)))) == NULL) {
4210 free(entry);
4211 return (-1);
4212 }
4213
4214 entry->pl_prop = ZPROP_INVAL;
4215 entry->pl_width = strlen(nvpair_name(elem));
4216 entry->pl_all = B_TRUE;
4217 *last = entry;
4218 }
4219 }
4220 }
4221
4222 /*
4223 * Now go through and check the width of any non-fixed columns
4224 */
4225 for (entry = *plp; entry != NULL; entry = entry->pl_next) {
4226 if (entry->pl_fixed && !literal)
4227 continue;
4228
4229 if (entry->pl_prop != ZPROP_INVAL) {
4230 if (zfs_prop_get(zhp, entry->pl_prop,
4231 buf, sizeof (buf), NULL, NULL, 0, literal) == 0) {
4232 if (strlen(buf) > entry->pl_width)
4233 entry->pl_width = strlen(buf);
4234 }
4235 if (received && zfs_prop_get_recvd(zhp,
4236 zfs_prop_to_name(entry->pl_prop),
4237 buf, sizeof (buf), literal) == 0)
4238 if (strlen(buf) > entry->pl_recvd_width)
4239 entry->pl_recvd_width = strlen(buf);
4240 } else {
4241 if (nvlist_lookup_nvlist(userprops, entry->pl_user_prop,
4242 &propval) == 0) {
4243 verify(nvlist_lookup_string(propval,
4244 ZPROP_VALUE, &strval) == 0);
4245 if (strlen(strval) > entry->pl_width)
4246 entry->pl_width = strlen(strval);
4247 }
4248 if (received && zfs_prop_get_recvd(zhp,
4249 entry->pl_user_prop,
4250 buf, sizeof (buf), literal) == 0)
4251 if (strlen(buf) > entry->pl_recvd_width)
4252 entry->pl_recvd_width = strlen(buf);
4253 }
4254 }
4255
4256 return (0);
4257 }
4258
4259 int
4260 zfs_deleg_share_nfs(libzfs_handle_t *hdl, char *dataset, char *path,
4261 char *resource, void *export, void *sharetab,
4262 int sharemax, zfs_share_op_t operation)
4263 {
4264 zfs_cmd_t zc = { 0 };
4265 int error;
4266
4267 (void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name));
4268 (void) strlcpy(zc.zc_value, path, sizeof (zc.zc_value));
4269 if (resource)
4270 (void) strlcpy(zc.zc_string, resource, sizeof (zc.zc_string));
4271 zc.zc_share.z_sharedata = (uint64_t)(uintptr_t)sharetab;
4272 zc.zc_share.z_exportdata = (uint64_t)(uintptr_t)export;
4273 zc.zc_share.z_sharetype = operation;
4274 zc.zc_share.z_sharemax = sharemax;
4275 error = ioctl(hdl->libzfs_fd, ZFS_IOC_SHARE, &zc);
4276 return (error);
4277 }
4278
4279 void
4280 zfs_prune_proplist(zfs_handle_t *zhp, uint8_t *props)
4281 {
4282 nvpair_t *curr;
4283
4284 /*
4285 * Keep a reference to the props-table against which we prune the
4286 * properties.
4287 */
4288 zhp->zfs_props_table = props;
4289
4290 curr = nvlist_next_nvpair(zhp->zfs_props, NULL);
4291
4292 while (curr) {
4293 zfs_prop_t zfs_prop = zfs_name_to_prop(nvpair_name(curr));
4294 nvpair_t *next = nvlist_next_nvpair(zhp->zfs_props, curr);
4295
4296 /*
4297 * User properties will result in ZPROP_INVAL, and since we
4298 * only know how to prune standard ZFS properties, we always
4299 * leave these in the list. This can also happen if we
4300 * encounter an unknown DSL property (when running older
4301 * software, for example).
4302 */
4303 if (zfs_prop != ZPROP_INVAL && props[zfs_prop] == B_FALSE)
4304 (void) nvlist_remove(zhp->zfs_props,
4305 nvpair_name(curr), nvpair_type(curr));
4306 curr = next;
4307 }
4308 }
4309
4310 static int
4311 zfs_smb_acl_mgmt(libzfs_handle_t *hdl, char *dataset, char *path,
4312 zfs_smb_acl_op_t cmd, char *resource1, char *resource2)
4313 {
4314 zfs_cmd_t zc = { 0 };
4315 nvlist_t *nvlist = NULL;
4316 int error;
4317
4318 (void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name));
4319 (void) strlcpy(zc.zc_value, path, sizeof (zc.zc_value));
4320 zc.zc_cookie = (uint64_t)cmd;
4321
4322 if (cmd == ZFS_SMB_ACL_RENAME) {
4323 if (nvlist_alloc(&nvlist, NV_UNIQUE_NAME, 0) != 0) {
4324 (void) no_memory(hdl);
4325 return (0);
4326 }
4327 }
4328
4329 switch (cmd) {
4330 case ZFS_SMB_ACL_ADD:
4331 case ZFS_SMB_ACL_REMOVE:
4332 (void) strlcpy(zc.zc_string, resource1, sizeof (zc.zc_string));
4333 break;
4334 case ZFS_SMB_ACL_RENAME:
4335 if (nvlist_add_string(nvlist, ZFS_SMB_ACL_SRC,
4336 resource1) != 0) {
4337 (void) no_memory(hdl);
4338 return (-1);
4339 }
4340 if (nvlist_add_string(nvlist, ZFS_SMB_ACL_TARGET,
4341 resource2) != 0) {
4342 (void) no_memory(hdl);
4343 return (-1);
4344 }
4345 if (zcmd_write_src_nvlist(hdl, &zc, nvlist) != 0) {
4346 nvlist_free(nvlist);
4347 return (-1);
4348 }
4349 break;
4350 case ZFS_SMB_ACL_PURGE:
4351 break;
4352 default:
4353 return (-1);
4354 }
4355 error = ioctl(hdl->libzfs_fd, ZFS_IOC_SMB_ACL, &zc);
4356 nvlist_free(nvlist);
4357 return (error);
4358 }
4359
4360 int
4361 zfs_smb_acl_add(libzfs_handle_t *hdl, char *dataset,
4362 char *path, char *resource)
4363 {
4364 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_ADD,
4365 resource, NULL));
4366 }
4367
4368 int
4369 zfs_smb_acl_remove(libzfs_handle_t *hdl, char *dataset,
4370 char *path, char *resource)
4371 {
4372 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_REMOVE,
4373 resource, NULL));
4374 }
4375
4376 int
4377 zfs_smb_acl_purge(libzfs_handle_t *hdl, char *dataset, char *path)
4378 {
4379 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_PURGE,
4380 NULL, NULL));
4381 }
4382
4383 int
4384 zfs_smb_acl_rename(libzfs_handle_t *hdl, char *dataset, char *path,
4385 char *oldname, char *newname)
4386 {
4387 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_RENAME,
4388 oldname, newname));
4389 }
4390
4391 int
4392 zfs_userspace(zfs_handle_t *zhp, zfs_userquota_prop_t type,
4393 zfs_userspace_cb_t func, void *arg)
4394 {
4395 zfs_cmd_t zc = { 0 };
4396 zfs_useracct_t buf[100];
4397 libzfs_handle_t *hdl = zhp->zfs_hdl;
4398 int ret;
4399
4400 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
4401
4402 zc.zc_objset_type = type;
4403 zc.zc_nvlist_dst = (uintptr_t)buf;
4404
4405 for (;;) {
4406 zfs_useracct_t *zua = buf;
4407
4408 zc.zc_nvlist_dst_size = sizeof (buf);
4409 if (zfs_ioctl(hdl, ZFS_IOC_USERSPACE_MANY, &zc) != 0) {
4410 char errbuf[1024];
4411
4412 (void) snprintf(errbuf, sizeof (errbuf),
4413 dgettext(TEXT_DOMAIN,
4414 "cannot get used/quota for %s"), zc.zc_name);
4415 return (zfs_standard_error_fmt(hdl, errno, errbuf));
4416 }
4417 if (zc.zc_nvlist_dst_size == 0)
4418 break;
4419
4420 while (zc.zc_nvlist_dst_size > 0) {
4421 if ((ret = func(arg, zua->zu_domain, zua->zu_rid,
4422 zua->zu_space)) != 0)
4423 return (ret);
4424 zua++;
4425 zc.zc_nvlist_dst_size -= sizeof (zfs_useracct_t);
4426 }
4427 }
4428
4429 return (0);
4430 }
4431
4432 struct holdarg {
4433 nvlist_t *nvl;
4434 const char *snapname;
4435 const char *tag;
4436 boolean_t recursive;
4437 int error;
4438 };
4439
4440 static int
4441 zfs_hold_one(zfs_handle_t *zhp, void *arg)
4442 {
4443 struct holdarg *ha = arg;
4444 char name[ZFS_MAX_DATASET_NAME_LEN];
4445 int rv = 0;
4446
4447 (void) snprintf(name, sizeof (name),
4448 "%s@%s", zhp->zfs_name, ha->snapname);
4449
4450 if (lzc_exists(name))
4451 fnvlist_add_string(ha->nvl, name, ha->tag);
4452
4453 if (ha->recursive)
4454 rv = zfs_iter_filesystems(zhp, zfs_hold_one, ha);
4455 zfs_close(zhp);
4456 return (rv);
4457 }
4458
4459 int
4460 zfs_hold(zfs_handle_t *zhp, const char *snapname, const char *tag,
4461 boolean_t recursive, int cleanup_fd)
4462 {
4463 int ret;
4464 struct holdarg ha;
4465
4466 ha.nvl = fnvlist_alloc();
4467 ha.snapname = snapname;
4468 ha.tag = tag;
4469 ha.recursive = recursive;
4470 (void) zfs_hold_one(zfs_handle_dup(zhp), &ha);
4471
4472 if (nvlist_empty(ha.nvl)) {
4473 char errbuf[1024];
4474
4475 fnvlist_free(ha.nvl);
4476 ret = ENOENT;
4477 (void) snprintf(errbuf, sizeof (errbuf),
4478 dgettext(TEXT_DOMAIN,
4479 "cannot hold snapshot '%s@%s'"),
4480 zhp->zfs_name, snapname);
4481 (void) zfs_standard_error(zhp->zfs_hdl, ret, errbuf);
4482 return (ret);
4483 }
4484
4485 ret = zfs_hold_nvl(zhp, cleanup_fd, ha.nvl);
4486 fnvlist_free(ha.nvl);
4487
4488 return (ret);
4489 }
4490
4491 int
4492 zfs_hold_nvl(zfs_handle_t *zhp, int cleanup_fd, nvlist_t *holds)
4493 {
4494 int ret;
4495 nvlist_t *errors;
4496 libzfs_handle_t *hdl = zhp->zfs_hdl;
4497 char errbuf[1024];
4498 nvpair_t *elem;
4499
4500 errors = NULL;
4501 ret = lzc_hold(holds, cleanup_fd, &errors);
4502
4503 if (ret == 0) {
4504 /* There may be errors even in the success case. */
4505 fnvlist_free(errors);
4506 return (0);
4507 }
4508
4509 if (nvlist_empty(errors)) {
4510 /* no hold-specific errors */
4511 (void) snprintf(errbuf, sizeof (errbuf),
4512 dgettext(TEXT_DOMAIN, "cannot hold"));
4513 switch (ret) {
4514 case ENOTSUP:
4515 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4516 "pool must be upgraded"));
4517 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf);
4518 break;
4519 case EINVAL:
4520 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
4521 break;
4522 default:
4523 (void) zfs_standard_error(hdl, ret, errbuf);
4524 }
4525 }
4526
4527 for (elem = nvlist_next_nvpair(errors, NULL);
4528 elem != NULL;
4529 elem = nvlist_next_nvpair(errors, elem)) {
4530 (void) snprintf(errbuf, sizeof (errbuf),
4531 dgettext(TEXT_DOMAIN,
4532 "cannot hold snapshot '%s'"), nvpair_name(elem));
4533 switch (fnvpair_value_int32(elem)) {
4534 case E2BIG:
4535 /*
4536 * Temporary tags wind up having the ds object id
4537 * prepended. So even if we passed the length check
4538 * above, it's still possible for the tag to wind
4539 * up being slightly too long.
4540 */
4541 (void) zfs_error(hdl, EZFS_TAGTOOLONG, errbuf);
4542 break;
4543 case EINVAL:
4544 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
4545 break;
4546 case EEXIST:
4547 (void) zfs_error(hdl, EZFS_REFTAG_HOLD, errbuf);
4548 break;
4549 default:
4550 (void) zfs_standard_error(hdl,
4551 fnvpair_value_int32(elem), errbuf);
4552 }
4553 }
4554
4555 fnvlist_free(errors);
4556 return (ret);
4557 }
4558
4559 static int
4560 zfs_release_one(zfs_handle_t *zhp, void *arg)
4561 {
4562 struct holdarg *ha = arg;
4563 char name[ZFS_MAX_DATASET_NAME_LEN];
4564 int rv = 0;
4565 nvlist_t *existing_holds;
4566
4567 (void) snprintf(name, sizeof (name),
4568 "%s@%s", zhp->zfs_name, ha->snapname);
4569
4570 if (lzc_get_holds(name, &existing_holds) != 0) {
4571 ha->error = ENOENT;
4572 } else if (!nvlist_exists(existing_holds, ha->tag)) {
4573 ha->error = ESRCH;
4574 } else {
4575 nvlist_t *torelease = fnvlist_alloc();
4576 fnvlist_add_boolean(torelease, ha->tag);
4577 fnvlist_add_nvlist(ha->nvl, name, torelease);
4578 fnvlist_free(torelease);
4579 }
4580
4581 if (ha->recursive)
4582 rv = zfs_iter_filesystems(zhp, zfs_release_one, ha);
4583 zfs_close(zhp);
4584 return (rv);
4585 }
4586
4587 int
4588 zfs_release(zfs_handle_t *zhp, const char *snapname, const char *tag,
4589 boolean_t recursive)
4590 {
4591 int ret;
4592 struct holdarg ha;
4593 nvlist_t *errors = NULL;
4594 nvpair_t *elem;
4595 libzfs_handle_t *hdl = zhp->zfs_hdl;
4596 char errbuf[1024];
4597
4598 ha.nvl = fnvlist_alloc();
4599 ha.snapname = snapname;
4600 ha.tag = tag;
4601 ha.recursive = recursive;
4602 ha.error = 0;
4603 (void) zfs_release_one(zfs_handle_dup(zhp), &ha);
4604
4605 if (nvlist_empty(ha.nvl)) {
4606 fnvlist_free(ha.nvl);
4607 ret = ha.error;
4608 (void) snprintf(errbuf, sizeof (errbuf),
4609 dgettext(TEXT_DOMAIN,
4610 "cannot release hold from snapshot '%s@%s'"),
4611 zhp->zfs_name, snapname);
4612 if (ret == ESRCH) {
4613 (void) zfs_error(hdl, EZFS_REFTAG_RELE, errbuf);
4614 } else {
4615 (void) zfs_standard_error(hdl, ret, errbuf);
4616 }
4617 return (ret);
4618 }
4619
4620 ret = lzc_release(ha.nvl, &errors);
4621 fnvlist_free(ha.nvl);
4622
4623 if (ret == 0) {
4624 /* There may be errors even in the success case. */
4625 fnvlist_free(errors);
4626 return (0);
4627 }
4628
4629 if (nvlist_empty(errors)) {
4630 /* no hold-specific errors */
4631 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
4632 "cannot release"));
4633 switch (errno) {
4634 case ENOTSUP:
4635 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4636 "pool must be upgraded"));
4637 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf);
4638 break;
4639 default:
4640 (void) zfs_standard_error_fmt(hdl, errno, errbuf);
4641 }
4642 }
4643
4644 for (elem = nvlist_next_nvpair(errors, NULL);
4645 elem != NULL;
4646 elem = nvlist_next_nvpair(errors, elem)) {
4647 (void) snprintf(errbuf, sizeof (errbuf),
4648 dgettext(TEXT_DOMAIN,
4649 "cannot release hold from snapshot '%s'"),
4650 nvpair_name(elem));
4651 switch (fnvpair_value_int32(elem)) {
4652 case ESRCH:
4653 (void) zfs_error(hdl, EZFS_REFTAG_RELE, errbuf);
4654 break;
4655 case EINVAL:
4656 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
4657 break;
4658 default:
4659 (void) zfs_standard_error_fmt(hdl,
4660 fnvpair_value_int32(elem), errbuf);
4661 }
4662 }
4663
4664 fnvlist_free(errors);
4665 return (ret);
4666 }
4667
4668 int
4669 zfs_get_fsacl(zfs_handle_t *zhp, nvlist_t **nvl)
4670 {
4671 zfs_cmd_t zc = { 0 };
4672 libzfs_handle_t *hdl = zhp->zfs_hdl;
4673 int nvsz = 2048;
4674 void *nvbuf;
4675 int err = 0;
4676 char errbuf[1024];
4677
4678 assert(zhp->zfs_type == ZFS_TYPE_VOLUME ||
4679 zhp->zfs_type == ZFS_TYPE_FILESYSTEM);
4680
4681 tryagain:
4682
4683 nvbuf = malloc(nvsz);
4684 if (nvbuf == NULL) {
4685 err = (zfs_error(hdl, EZFS_NOMEM, strerror(errno)));
4686 goto out;
4687 }
4688
4689 zc.zc_nvlist_dst_size = nvsz;
4690 zc.zc_nvlist_dst = (uintptr_t)nvbuf;
4691
4692 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
4693
4694 if (ioctl(hdl->libzfs_fd, ZFS_IOC_GET_FSACL, &zc) != 0) {
4695 (void) snprintf(errbuf, sizeof (errbuf),
4696 dgettext(TEXT_DOMAIN, "cannot get permissions on '%s'"),
4697 zc.zc_name);
4698 switch (errno) {
4699 case ENOMEM:
4700 free(nvbuf);
4701 nvsz = zc.zc_nvlist_dst_size;
4702 goto tryagain;
4703
4704 case ENOTSUP:
4705 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4706 "pool must be upgraded"));
4707 err = zfs_error(hdl, EZFS_BADVERSION, errbuf);
4708 break;
4709 case EINVAL:
4710 err = zfs_error(hdl, EZFS_BADTYPE, errbuf);
4711 break;
4712 case ENOENT:
4713 err = zfs_error(hdl, EZFS_NOENT, errbuf);
4714 break;
4715 default:
4716 err = zfs_standard_error_fmt(hdl, errno, errbuf);
4717 break;
4718 }
4719 } else {
4720 /* success */
4721 int rc = nvlist_unpack(nvbuf, zc.zc_nvlist_dst_size, nvl, 0);
4722 if (rc) {
4723 (void) snprintf(errbuf, sizeof (errbuf), dgettext(
4724 TEXT_DOMAIN, "cannot get permissions on '%s'"),
4725 zc.zc_name);
4726 err = zfs_standard_error_fmt(hdl, rc, errbuf);
4727 }
4728 }
4729
4730 free(nvbuf);
4731 out:
4732 return (err);
4733 }
4734
4735 int
4736 zfs_set_fsacl(zfs_handle_t *zhp, boolean_t un, nvlist_t *nvl)
4737 {
4738 zfs_cmd_t zc = { 0 };
4739 libzfs_handle_t *hdl = zhp->zfs_hdl;
4740 char *nvbuf;
4741 char errbuf[1024];
4742 size_t nvsz;
4743 int err;
4744
4745 assert(zhp->zfs_type == ZFS_TYPE_VOLUME ||
4746 zhp->zfs_type == ZFS_TYPE_FILESYSTEM);
4747
4748 err = nvlist_size(nvl, &nvsz, NV_ENCODE_NATIVE);
4749 assert(err == 0);
4750
4751 nvbuf = malloc(nvsz);
4752
4753 err = nvlist_pack(nvl, &nvbuf, &nvsz, NV_ENCODE_NATIVE, 0);
4754 assert(err == 0);
4755
4756 zc.zc_nvlist_src_size = nvsz;
4757 zc.zc_nvlist_src = (uintptr_t)nvbuf;
4758 zc.zc_perm_action = un;
4759
4760 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
4761
4762 if (zfs_ioctl(hdl, ZFS_IOC_SET_FSACL, &zc) != 0) {
4763 (void) snprintf(errbuf, sizeof (errbuf),
4764 dgettext(TEXT_DOMAIN, "cannot set permissions on '%s'"),
4765 zc.zc_name);
4766 switch (errno) {
4767 case ENOTSUP:
4768 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4769 "pool must be upgraded"));
4770 err = zfs_error(hdl, EZFS_BADVERSION, errbuf);
4771 break;
4772 case EINVAL:
4773 err = zfs_error(hdl, EZFS_BADTYPE, errbuf);
4774 break;
4775 case ENOENT:
4776 err = zfs_error(hdl, EZFS_NOENT, errbuf);
4777 break;
4778 default:
4779 err = zfs_standard_error_fmt(hdl, errno, errbuf);
4780 break;
4781 }
4782 }
4783
4784 free(nvbuf);
4785
4786 return (err);
4787 }
4788
4789 int
4790 zfs_get_holds(zfs_handle_t *zhp, nvlist_t **nvl)
4791 {
4792 int err;
4793 char errbuf[1024];
4794
4795 err = lzc_get_holds(zhp->zfs_name, nvl);
4796
4797 if (err != 0) {
4798 libzfs_handle_t *hdl = zhp->zfs_hdl;
4799
4800 (void) snprintf(errbuf, sizeof (errbuf),
4801 dgettext(TEXT_DOMAIN, "cannot get holds for '%s'"),
4802 zhp->zfs_name);
4803 switch (err) {
4804 case ENOTSUP:
4805 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4806 "pool must be upgraded"));
4807 err = zfs_error(hdl, EZFS_BADVERSION, errbuf);
4808 break;
4809 case EINVAL:
4810 err = zfs_error(hdl, EZFS_BADTYPE, errbuf);
4811 break;
4812 case ENOENT:
4813 err = zfs_error(hdl, EZFS_NOENT, errbuf);
4814 break;
4815 default:
4816 err = zfs_standard_error_fmt(hdl, errno, errbuf);
4817 break;
4818 }
4819 }
4820
4821 return (err);
4822 }
4823
4824 /*
4825 * Convert the zvol's volume size to an appropriate reservation.
4826 * Note: If this routine is updated, it is necessary to update the ZFS test
4827 * suite's shell version in reservation.kshlib.
4828 */
4829 uint64_t
4830 zvol_volsize_to_reservation(uint64_t volsize, nvlist_t *props)
4831 {
4832 uint64_t numdb;
4833 uint64_t nblocks, volblocksize;
4834 int ncopies;
4835 char *strval;
4836
4837 if (nvlist_lookup_string(props,
4838 zfs_prop_to_name(ZFS_PROP_COPIES), &strval) == 0)
4839 ncopies = atoi(strval);
4840 else
4841 ncopies = 1;
4842 if (nvlist_lookup_uint64(props,
4843 zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
4844 &volblocksize) != 0)
4845 volblocksize = ZVOL_DEFAULT_BLOCKSIZE;
4846 nblocks = volsize/volblocksize;
4847 /* start with metadnode L0-L6 */
4848 numdb = 7;
4849 /* calculate number of indirects */
4850 while (nblocks > 1) {
4851 nblocks += DNODES_PER_LEVEL - 1;
4852 nblocks /= DNODES_PER_LEVEL;
4853 numdb += nblocks;
4854 }
4855 numdb *= MIN(SPA_DVAS_PER_BP, ncopies + 1);
4856 volsize *= ncopies;
4857 /*
4858 * this is exactly DN_MAX_INDBLKSHIFT when metadata isn't
4859 * compressed, but in practice they compress down to about
4860 * 1100 bytes
4861 */
4862 numdb *= 1ULL << DN_MAX_INDBLKSHIFT;
4863 volsize += numdb;
4864 return (volsize);
4865 }
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