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