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