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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 */
25
26 #include <ctype.h>
27 #include <errno.h>
28 #include <libintl.h>
29 #include <math.h>
30 #include <stdio.h>
31 #include <stdlib.h>
32 #include <strings.h>
33 #include <unistd.h>
34 #include <stddef.h>
35 #include <zone.h>
36 #include <fcntl.h>
37 #include <sys/mntent.h>
38 #include <sys/mount.h>
39 #include <priv.h>
40 #include <pwd.h>
41 #include <grp.h>
42 #include <stddef.h>
43 #include <ucred.h>
44 #ifdef HAVE_IDMAP
45 #include <idmap.h>
46 #include <aclutils.h>
47 #include <directory.h>
48 #endif /* HAVE_IDMAP */
49
50 #include <sys/dnode.h>
51 #include <sys/spa.h>
52 #include <sys/zap.h>
53 #include <libzfs.h>
54
55 #include "zfs_namecheck.h"
56 #include "zfs_prop.h"
57 #include "libzfs_impl.h"
58 #include "zfs_deleg.h"
59
60 static int zvol_create_link_common(libzfs_handle_t *, const char *, int);
61 static int userquota_propname_decode(const char *propname, boolean_t zoned,
62 zfs_userquota_prop_t *typep, char *domain, int domainlen, uint64_t *ridp);
63
64 /*
65 * Given a single type (not a mask of types), return the type in a human
66 * readable form.
67 */
68 const char *
69 zfs_type_to_name(zfs_type_t type)
70 {
71 switch (type) {
72 case ZFS_TYPE_FILESYSTEM:
73 return (dgettext(TEXT_DOMAIN, "filesystem"));
74 case ZFS_TYPE_SNAPSHOT:
75 return (dgettext(TEXT_DOMAIN, "snapshot"));
76 case ZFS_TYPE_VOLUME:
77 return (dgettext(TEXT_DOMAIN, "volume"));
78 default:
79 break;
80 }
81
82 return (NULL);
83 }
84
85 /*
86 * Validate a ZFS path. This is used even before trying to open the dataset, to
87 * provide a more meaningful error message. We call zfs_error_aux() to
88 * explain exactly why the name was not valid.
89 */
90 int
91 zfs_validate_name(libzfs_handle_t *hdl, const char *path, int type,
92 boolean_t modifying)
93 {
94 namecheck_err_t why;
95 char what;
96
97 if (dataset_namecheck(path, &why, &what) != 0) {
98 if (hdl != NULL) {
99 switch (why) {
100 case NAME_ERR_TOOLONG:
101 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
102 "name is too long"));
103 break;
104
105 case NAME_ERR_LEADING_SLASH:
106 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
107 "leading slash in name"));
108 break;
109
110 case NAME_ERR_EMPTY_COMPONENT:
111 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
112 "empty component in name"));
113 break;
114
115 case NAME_ERR_TRAILING_SLASH:
116 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
117 "trailing slash in name"));
118 break;
119
120 case NAME_ERR_INVALCHAR:
121 zfs_error_aux(hdl,
122 dgettext(TEXT_DOMAIN, "invalid character "
123 "'%c' in name"), what);
124 break;
125
126 case NAME_ERR_MULTIPLE_AT:
127 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
128 "multiple '@' delimiters in name"));
129 break;
130
131 case NAME_ERR_NOLETTER:
132 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
133 "pool doesn't begin with a letter"));
134 break;
135
136 case NAME_ERR_RESERVED:
137 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
138 "name is reserved"));
139 break;
140
141 case NAME_ERR_DISKLIKE:
142 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
143 "reserved disk name"));
144 break;
145 default:
146 break;
147 }
148 }
149
150 return (0);
151 }
152
153 if (!(type & ZFS_TYPE_SNAPSHOT) && strchr(path, '@') != NULL) {
154 if (hdl != NULL)
155 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
156 "snapshot delimiter '@' in filesystem name"));
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 "missing '@' delimiter in snapshot name"));
164 return (0);
165 }
166
167 if (modifying && strchr(path, '%') != NULL) {
168 if (hdl != NULL)
169 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
170 "invalid character %c in name"), '%');
171 return (0);
172 }
173
174 return (-1);
175 }
176
177 int
178 zfs_name_valid(const char *name, zfs_type_t type)
179 {
180 if (type == ZFS_TYPE_POOL)
181 return (zpool_name_valid(NULL, B_FALSE, name));
182 return (zfs_validate_name(NULL, name, type, B_FALSE));
183 }
184
185 /*
186 * This function takes the raw DSL properties, and filters out the user-defined
187 * properties into a separate nvlist.
188 */
189 static nvlist_t *
190 process_user_props(zfs_handle_t *zhp, nvlist_t *props)
191 {
192 libzfs_handle_t *hdl = zhp->zfs_hdl;
193 nvpair_t *elem;
194 nvlist_t *propval;
195 nvlist_t *nvl;
196
197 if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0) {
198 (void) no_memory(hdl);
199 return (NULL);
200 }
201
202 elem = NULL;
203 while ((elem = nvlist_next_nvpair(props, elem)) != NULL) {
204 if (!zfs_prop_user(nvpair_name(elem)))
205 continue;
206
207 verify(nvpair_value_nvlist(elem, &propval) == 0);
208 if (nvlist_add_nvlist(nvl, nvpair_name(elem), propval) != 0) {
209 nvlist_free(nvl);
210 (void) no_memory(hdl);
211 return (NULL);
212 }
213 }
214
215 return (nvl);
216 }
217
218 static zpool_handle_t *
219 zpool_add_handle(zfs_handle_t *zhp, const char *pool_name)
220 {
221 libzfs_handle_t *hdl = zhp->zfs_hdl;
222 zpool_handle_t *zph;
223
224 if ((zph = zpool_open_canfail(hdl, pool_name)) != NULL) {
225 if (hdl->libzfs_pool_handles != NULL)
226 zph->zpool_next = hdl->libzfs_pool_handles;
227 hdl->libzfs_pool_handles = zph;
228 }
229 return (zph);
230 }
231
232 static zpool_handle_t *
233 zpool_find_handle(zfs_handle_t *zhp, const char *pool_name, int len)
234 {
235 libzfs_handle_t *hdl = zhp->zfs_hdl;
236 zpool_handle_t *zph = hdl->libzfs_pool_handles;
237
238 while ((zph != NULL) &&
239 (strncmp(pool_name, zpool_get_name(zph), len) != 0))
240 zph = zph->zpool_next;
241 return (zph);
242 }
243
244 /*
245 * Returns a handle to the pool that contains the provided dataset.
246 * If a handle to that pool already exists then that handle is returned.
247 * Otherwise, a new handle is created and added to the list of handles.
248 */
249 static zpool_handle_t *
250 zpool_handle(zfs_handle_t *zhp)
251 {
252 char *pool_name;
253 int len;
254 zpool_handle_t *zph;
255
256 len = strcspn(zhp->zfs_name, "/@") + 1;
257 pool_name = zfs_alloc(zhp->zfs_hdl, len);
258 (void) strlcpy(pool_name, zhp->zfs_name, len);
259
260 zph = zpool_find_handle(zhp, pool_name, len);
261 if (zph == NULL)
262 zph = zpool_add_handle(zhp, pool_name);
263
264 free(pool_name);
265 return (zph);
266 }
267
268 void
269 zpool_free_handles(libzfs_handle_t *hdl)
270 {
271 zpool_handle_t *next, *zph = hdl->libzfs_pool_handles;
272
273 while (zph != NULL) {
274 next = zph->zpool_next;
275 zpool_close(zph);
276 zph = next;
277 }
278 hdl->libzfs_pool_handles = NULL;
279 }
280
281 /*
282 * Utility function to gather stats (objset and zpl) for the given object.
283 */
284 static int
285 get_stats_ioctl(zfs_handle_t *zhp, zfs_cmd_t *zc)
286 {
287 libzfs_handle_t *hdl = zhp->zfs_hdl;
288
289 (void) strlcpy(zc->zc_name, zhp->zfs_name, sizeof (zc->zc_name));
290
291 while (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_STATS, zc) != 0) {
292 if (errno == ENOMEM) {
293 if (zcmd_expand_dst_nvlist(hdl, zc) != 0) {
294 return (-1);
295 }
296 } else {
297 return (-1);
298 }
299 }
300 return (0);
301 }
302
303 /*
304 * Utility function to get the received properties of the given object.
305 */
306 static int
307 get_recvd_props_ioctl(zfs_handle_t *zhp)
308 {
309 libzfs_handle_t *hdl = zhp->zfs_hdl;
310 nvlist_t *recvdprops;
311 zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
312 int err;
313
314 if (zcmd_alloc_dst_nvlist(hdl, &zc, 0) != 0)
315 return (-1);
316
317 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
318
319 while (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_RECVD_PROPS, &zc) != 0) {
320 if (errno == ENOMEM) {
321 if (zcmd_expand_dst_nvlist(hdl, &zc) != 0) {
322 return (-1);
323 }
324 } else {
325 zcmd_free_nvlists(&zc);
326 return (-1);
327 }
328 }
329
330 err = zcmd_read_dst_nvlist(zhp->zfs_hdl, &zc, &recvdprops);
331 zcmd_free_nvlists(&zc);
332 if (err != 0)
333 return (-1);
334
335 nvlist_free(zhp->zfs_recvd_props);
336 zhp->zfs_recvd_props = recvdprops;
337
338 return (0);
339 }
340
341 static int
342 put_stats_zhdl(zfs_handle_t *zhp, zfs_cmd_t *zc)
343 {
344 nvlist_t *allprops, *userprops;
345
346 zhp->zfs_dmustats = zc->zc_objset_stats; /* structure assignment */
347
348 if (zcmd_read_dst_nvlist(zhp->zfs_hdl, zc, &allprops) != 0) {
349 return (-1);
350 }
351
352 /*
353 * XXX Why do we store the user props separately, in addition to
354 * storing them in zfs_props?
355 */
356 if ((userprops = process_user_props(zhp, allprops)) == NULL) {
357 nvlist_free(allprops);
358 return (-1);
359 }
360
361 nvlist_free(zhp->zfs_props);
362 nvlist_free(zhp->zfs_user_props);
363
364 zhp->zfs_props = allprops;
365 zhp->zfs_user_props = userprops;
366
367 return (0);
368 }
369
370 static int
371 get_stats(zfs_handle_t *zhp)
372 {
373 int rc = 0;
374 zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
375
376 if (zcmd_alloc_dst_nvlist(zhp->zfs_hdl, &zc, 0) != 0)
377 return (-1);
378 if (get_stats_ioctl(zhp, &zc) != 0)
379 rc = -1;
380 else if (put_stats_zhdl(zhp, &zc) != 0)
381 rc = -1;
382 zcmd_free_nvlists(&zc);
383 return (rc);
384 }
385
386 /*
387 * Refresh the properties currently stored in the handle.
388 */
389 void
390 zfs_refresh_properties(zfs_handle_t *zhp)
391 {
392 (void) get_stats(zhp);
393 }
394
395 /*
396 * Makes a handle from the given dataset name. Used by zfs_open() and
397 * zfs_iter_* to create child handles on the fly.
398 */
399 static int
400 make_dataset_handle_common(zfs_handle_t *zhp, zfs_cmd_t *zc)
401 {
402 if (put_stats_zhdl(zhp, zc) != 0)
403 return (-1);
404
405 /*
406 * We've managed to open the dataset and gather statistics. Determine
407 * the high-level type.
408 */
409 if (zhp->zfs_dmustats.dds_type == DMU_OST_ZVOL)
410 zhp->zfs_head_type = ZFS_TYPE_VOLUME;
411 else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZFS)
412 zhp->zfs_head_type = ZFS_TYPE_FILESYSTEM;
413 else
414 abort();
415
416 if (zhp->zfs_dmustats.dds_is_snapshot)
417 zhp->zfs_type = ZFS_TYPE_SNAPSHOT;
418 else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZVOL)
419 zhp->zfs_type = ZFS_TYPE_VOLUME;
420 else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZFS)
421 zhp->zfs_type = ZFS_TYPE_FILESYSTEM;
422 else
423 abort(); /* we should never see any other types */
424
425 if ((zhp->zpool_hdl = zpool_handle(zhp)) == NULL)
426 return (-1);
427
428 return (0);
429 }
430
431 zfs_handle_t *
432 make_dataset_handle(libzfs_handle_t *hdl, const char *path)
433 {
434 zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
435
436 zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1);
437
438 if (zhp == NULL)
439 return (NULL);
440
441 zhp->zfs_hdl = hdl;
442 (void) strlcpy(zhp->zfs_name, path, sizeof (zhp->zfs_name));
443 if (zcmd_alloc_dst_nvlist(hdl, &zc, 0) != 0) {
444 free(zhp);
445 return (NULL);
446 }
447 if (get_stats_ioctl(zhp, &zc) == -1) {
448 zcmd_free_nvlists(&zc);
449 free(zhp);
450 return (NULL);
451 }
452 if (make_dataset_handle_common(zhp, &zc) == -1) {
453 free(zhp);
454 zhp = NULL;
455 }
456 zcmd_free_nvlists(&zc);
457 return (zhp);
458 }
459
460 static zfs_handle_t *
461 make_dataset_handle_zc(libzfs_handle_t *hdl, zfs_cmd_t *zc)
462 {
463 zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1);
464
465 if (zhp == NULL)
466 return (NULL);
467
468 zhp->zfs_hdl = hdl;
469 (void) strlcpy(zhp->zfs_name, zc->zc_name, sizeof (zhp->zfs_name));
470 if (make_dataset_handle_common(zhp, zc) == -1) {
471 free(zhp);
472 return (NULL);
473 }
474 return (zhp);
475 }
476
477 /*
478 * Opens the given snapshot, filesystem, or volume. The 'types'
479 * argument is a mask of acceptable types. The function will print an
480 * appropriate error message and return NULL if it can't be opened.
481 */
482 zfs_handle_t *
483 zfs_open(libzfs_handle_t *hdl, const char *path, int types)
484 {
485 zfs_handle_t *zhp;
486 char errbuf[1024];
487
488 (void) snprintf(errbuf, sizeof (errbuf),
489 dgettext(TEXT_DOMAIN, "cannot open '%s'"), path);
490
491 /*
492 * Validate the name before we even try to open it.
493 */
494 if (!zfs_validate_name(hdl, path, ZFS_TYPE_DATASET, B_FALSE)) {
495 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
496 "invalid dataset name"));
497 (void) zfs_error(hdl, EZFS_INVALIDNAME, errbuf);
498 return (NULL);
499 }
500
501 /*
502 * Try to get stats for the dataset, which will tell us if it exists.
503 */
504 errno = 0;
505 if ((zhp = make_dataset_handle(hdl, path)) == NULL) {
506 (void) zfs_standard_error(hdl, errno, errbuf);
507 return (NULL);
508 }
509
510 if (!(types & zhp->zfs_type)) {
511 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
512 zfs_close(zhp);
513 return (NULL);
514 }
515
516 return (zhp);
517 }
518
519 /*
520 * Release a ZFS handle. Nothing to do but free the associated memory.
521 */
522 void
523 zfs_close(zfs_handle_t *zhp)
524 {
525 if (zhp->zfs_mntopts)
526 free(zhp->zfs_mntopts);
527 nvlist_free(zhp->zfs_props);
528 nvlist_free(zhp->zfs_user_props);
529 nvlist_free(zhp->zfs_recvd_props);
530 free(zhp);
531 }
532
533 typedef struct mnttab_node {
534 struct mnttab mtn_mt;
535 avl_node_t mtn_node;
536 } mnttab_node_t;
537
538 static int
539 libzfs_mnttab_cache_compare(const void *arg1, const void *arg2)
540 {
541 const mnttab_node_t *mtn1 = arg1;
542 const mnttab_node_t *mtn2 = arg2;
543 int rv;
544
545 rv = strcmp(mtn1->mtn_mt.mnt_special, mtn2->mtn_mt.mnt_special);
546
547 if (rv == 0)
548 return (0);
549 return (rv > 0 ? 1 : -1);
550 }
551
552 void
553 libzfs_mnttab_init(libzfs_handle_t *hdl)
554 {
555 assert(avl_numnodes(&hdl->libzfs_mnttab_cache) == 0);
556 avl_create(&hdl->libzfs_mnttab_cache, libzfs_mnttab_cache_compare,
557 sizeof (mnttab_node_t), offsetof(mnttab_node_t, mtn_node));
558 }
559
560 void
561 libzfs_mnttab_update(libzfs_handle_t *hdl)
562 {
563 struct mnttab entry;
564
565 rewind(hdl->libzfs_mnttab);
566 while (getmntent(hdl->libzfs_mnttab, &entry) == 0) {
567 mnttab_node_t *mtn;
568
569 if (strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0)
570 continue;
571 mtn = zfs_alloc(hdl, sizeof (mnttab_node_t));
572 mtn->mtn_mt.mnt_special = zfs_strdup(hdl, entry.mnt_special);
573 mtn->mtn_mt.mnt_mountp = zfs_strdup(hdl, entry.mnt_mountp);
574 mtn->mtn_mt.mnt_fstype = zfs_strdup(hdl, entry.mnt_fstype);
575 mtn->mtn_mt.mnt_mntopts = zfs_strdup(hdl, entry.mnt_mntopts);
576 avl_add(&hdl->libzfs_mnttab_cache, mtn);
577 }
578 }
579
580 void
581 libzfs_mnttab_fini(libzfs_handle_t *hdl)
582 {
583 void *cookie = NULL;
584 mnttab_node_t *mtn;
585
586 while ((mtn = avl_destroy_nodes(&hdl->libzfs_mnttab_cache, &cookie))) {
587 free(mtn->mtn_mt.mnt_special);
588 free(mtn->mtn_mt.mnt_mountp);
589 free(mtn->mtn_mt.mnt_fstype);
590 free(mtn->mtn_mt.mnt_mntopts);
591 free(mtn);
592 }
593 avl_destroy(&hdl->libzfs_mnttab_cache);
594 }
595
596 void
597 libzfs_mnttab_cache(libzfs_handle_t *hdl, boolean_t enable)
598 {
599 hdl->libzfs_mnttab_enable = enable;
600 }
601
602 int
603 libzfs_mnttab_find(libzfs_handle_t *hdl, const char *fsname,
604 struct mnttab *entry)
605 {
606 mnttab_node_t find;
607 mnttab_node_t *mtn;
608
609 if (!hdl->libzfs_mnttab_enable) {
610 struct mnttab srch = { 0 };
611
612 if (avl_numnodes(&hdl->libzfs_mnttab_cache))
613 libzfs_mnttab_fini(hdl);
614 rewind(hdl->libzfs_mnttab);
615 srch.mnt_special = (char *)fsname;
616 srch.mnt_fstype = MNTTYPE_ZFS;
617 if (getmntany(hdl->libzfs_mnttab, entry, &srch) == 0)
618 return (0);
619 else
620 return (ENOENT);
621 }
622
623 if (avl_numnodes(&hdl->libzfs_mnttab_cache) == 0)
624 libzfs_mnttab_update(hdl);
625
626 find.mtn_mt.mnt_special = (char *)fsname;
627 mtn = avl_find(&hdl->libzfs_mnttab_cache, &find, NULL);
628 if (mtn) {
629 *entry = mtn->mtn_mt;
630 return (0);
631 }
632 return (ENOENT);
633 }
634
635 void
636 libzfs_mnttab_add(libzfs_handle_t *hdl, const char *special,
637 const char *mountp, const char *mntopts)
638 {
639 mnttab_node_t *mtn;
640
641 if (avl_numnodes(&hdl->libzfs_mnttab_cache) == 0)
642 return;
643 mtn = zfs_alloc(hdl, sizeof (mnttab_node_t));
644 mtn->mtn_mt.mnt_special = zfs_strdup(hdl, special);
645 mtn->mtn_mt.mnt_mountp = zfs_strdup(hdl, mountp);
646 mtn->mtn_mt.mnt_fstype = zfs_strdup(hdl, MNTTYPE_ZFS);
647 mtn->mtn_mt.mnt_mntopts = zfs_strdup(hdl, mntopts);
648 avl_add(&hdl->libzfs_mnttab_cache, mtn);
649 }
650
651 void
652 libzfs_mnttab_remove(libzfs_handle_t *hdl, const char *fsname)
653 {
654 mnttab_node_t find;
655 mnttab_node_t *ret;
656
657 find.mtn_mt.mnt_special = (char *)fsname;
658 if ((ret = avl_find(&hdl->libzfs_mnttab_cache, (void *)&find, NULL))) {
659 avl_remove(&hdl->libzfs_mnttab_cache, ret);
660 free(ret->mtn_mt.mnt_special);
661 free(ret->mtn_mt.mnt_mountp);
662 free(ret->mtn_mt.mnt_fstype);
663 free(ret->mtn_mt.mnt_mntopts);
664 free(ret);
665 }
666 }
667
668 int
669 zfs_spa_version(zfs_handle_t *zhp, int *spa_version)
670 {
671 zpool_handle_t *zpool_handle = zhp->zpool_hdl;
672
673 if (zpool_handle == NULL)
674 return (-1);
675
676 *spa_version = zpool_get_prop_int(zpool_handle,
677 ZPOOL_PROP_VERSION, NULL);
678 return (0);
679 }
680
681 /*
682 * The choice of reservation property depends on the SPA version.
683 */
684 static int
685 zfs_which_resv_prop(zfs_handle_t *zhp, zfs_prop_t *resv_prop)
686 {
687 int spa_version;
688
689 if (zfs_spa_version(zhp, &spa_version) < 0)
690 return (-1);
691
692 if (spa_version >= SPA_VERSION_REFRESERVATION)
693 *resv_prop = ZFS_PROP_REFRESERVATION;
694 else
695 *resv_prop = ZFS_PROP_RESERVATION;
696
697 return (0);
698 }
699
700 /*
701 * Given an nvlist of properties to set, validates that they are correct, and
702 * parses any numeric properties (index, boolean, etc) if they are specified as
703 * strings.
704 */
705 nvlist_t *
706 zfs_valid_proplist(libzfs_handle_t *hdl, zfs_type_t type, nvlist_t *nvl,
707 uint64_t zoned, zfs_handle_t *zhp, const char *errbuf)
708 {
709 nvpair_t *elem;
710 uint64_t intval;
711 char *strval;
712 zfs_prop_t prop;
713 nvlist_t *ret;
714 int chosen_normal = -1;
715 int chosen_utf = -1;
716
717 if (nvlist_alloc(&ret, NV_UNIQUE_NAME, 0) != 0) {
718 (void) no_memory(hdl);
719 return (NULL);
720 }
721
722 /*
723 * Make sure this property is valid and applies to this type.
724 */
725
726 elem = NULL;
727 while ((elem = nvlist_next_nvpair(nvl, elem)) != NULL) {
728 const char *propname = nvpair_name(elem);
729
730 prop = zfs_name_to_prop(propname);
731 if (prop == ZPROP_INVAL && zfs_prop_user(propname)) {
732 /*
733 * This is a user property: make sure it's a
734 * string, and that it's less than ZAP_MAXNAMELEN.
735 */
736 if (nvpair_type(elem) != DATA_TYPE_STRING) {
737 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
738 "'%s' must be a string"), propname);
739 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
740 goto error;
741 }
742
743 if (strlen(nvpair_name(elem)) >= ZAP_MAXNAMELEN) {
744 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
745 "property name '%s' is too long"),
746 propname);
747 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
748 goto error;
749 }
750
751 (void) nvpair_value_string(elem, &strval);
752 if (nvlist_add_string(ret, propname, strval) != 0) {
753 (void) no_memory(hdl);
754 goto error;
755 }
756 continue;
757 }
758
759 /*
760 * Currently, only user properties can be modified on
761 * snapshots.
762 */
763 if (type == ZFS_TYPE_SNAPSHOT) {
764 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
765 "this property can not be modified for snapshots"));
766 (void) zfs_error(hdl, EZFS_PROPTYPE, errbuf);
767 goto error;
768 }
769
770 if (prop == ZPROP_INVAL && zfs_prop_userquota(propname)) {
771 zfs_userquota_prop_t uqtype;
772 char newpropname[128];
773 char domain[128];
774 uint64_t rid;
775 uint64_t valary[3];
776
777 if (userquota_propname_decode(propname, zoned,
778 &uqtype, domain, sizeof (domain), &rid) != 0) {
779 zfs_error_aux(hdl,
780 dgettext(TEXT_DOMAIN,
781 "'%s' has an invalid user/group name"),
782 propname);
783 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
784 goto error;
785 }
786
787 if (uqtype != ZFS_PROP_USERQUOTA &&
788 uqtype != ZFS_PROP_GROUPQUOTA) {
789 zfs_error_aux(hdl,
790 dgettext(TEXT_DOMAIN, "'%s' is readonly"),
791 propname);
792 (void) zfs_error(hdl, EZFS_PROPREADONLY,
793 errbuf);
794 goto error;
795 }
796
797 if (nvpair_type(elem) == DATA_TYPE_STRING) {
798 (void) nvpair_value_string(elem, &strval);
799 if (strcmp(strval, "none") == 0) {
800 intval = 0;
801 } else if (zfs_nicestrtonum(hdl,
802 strval, &intval) != 0) {
803 (void) zfs_error(hdl,
804 EZFS_BADPROP, errbuf);
805 goto error;
806 }
807 } else if (nvpair_type(elem) ==
808 DATA_TYPE_UINT64) {
809 (void) nvpair_value_uint64(elem, &intval);
810 if (intval == 0) {
811 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
812 "use 'none' to disable "
813 "userquota/groupquota"));
814 goto error;
815 }
816 } else {
817 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
818 "'%s' must be a number"), propname);
819 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
820 goto error;
821 }
822
823 /*
824 * Encode the prop name as
825 * userquota@<hex-rid>-domain, to make it easy
826 * for the kernel to decode.
827 */
828 (void) snprintf(newpropname, sizeof (newpropname),
829 "%s%llx-%s", zfs_userquota_prop_prefixes[uqtype],
830 (longlong_t)rid, domain);
831 valary[0] = uqtype;
832 valary[1] = rid;
833 valary[2] = intval;
834 if (nvlist_add_uint64_array(ret, newpropname,
835 valary, 3) != 0) {
836 (void) no_memory(hdl);
837 goto error;
838 }
839 continue;
840 }
841
842 if (prop == ZPROP_INVAL) {
843 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
844 "invalid property '%s'"), propname);
845 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
846 goto error;
847 }
848
849 if (!zfs_prop_valid_for_type(prop, type)) {
850 zfs_error_aux(hdl,
851 dgettext(TEXT_DOMAIN, "'%s' does not "
852 "apply to datasets of this type"), propname);
853 (void) zfs_error(hdl, EZFS_PROPTYPE, errbuf);
854 goto error;
855 }
856
857 if (zfs_prop_readonly(prop) &&
858 (!zfs_prop_setonce(prop) || zhp != NULL)) {
859 zfs_error_aux(hdl,
860 dgettext(TEXT_DOMAIN, "'%s' is readonly"),
861 propname);
862 (void) zfs_error(hdl, EZFS_PROPREADONLY, errbuf);
863 goto error;
864 }
865
866 if (zprop_parse_value(hdl, elem, prop, type, ret,
867 &strval, &intval, errbuf) != 0)
868 goto error;
869
870 /*
871 * Perform some additional checks for specific properties.
872 */
873 switch (prop) {
874 case ZFS_PROP_VERSION:
875 {
876 int version;
877
878 if (zhp == NULL)
879 break;
880 version = zfs_prop_get_int(zhp, ZFS_PROP_VERSION);
881 if (intval < version) {
882 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
883 "Can not downgrade; already at version %u"),
884 version);
885 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
886 goto error;
887 }
888 break;
889 }
890
891 case ZFS_PROP_RECORDSIZE:
892 case ZFS_PROP_VOLBLOCKSIZE:
893 /* must be power of two within SPA_{MIN,MAX}BLOCKSIZE */
894 if (intval < SPA_MINBLOCKSIZE ||
895 intval > SPA_MAXBLOCKSIZE || !ISP2(intval)) {
896 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
897 "'%s' must be power of 2 from %u "
898 "to %uk"), propname,
899 (uint_t)SPA_MINBLOCKSIZE,
900 (uint_t)SPA_MAXBLOCKSIZE >> 10);
901 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
902 goto error;
903 }
904 break;
905
906 case ZFS_PROP_MLSLABEL:
907 {
908 #ifdef HAVE_MLSLABEL
909 /*
910 * Verify the mlslabel string and convert to
911 * internal hex label string.
912 */
913
914 m_label_t *new_sl;
915 char *hex = NULL; /* internal label string */
916
917 /* Default value is already OK. */
918 if (strcasecmp(strval, ZFS_MLSLABEL_DEFAULT) == 0)
919 break;
920
921 /* Verify the label can be converted to binary form */
922 if (((new_sl = m_label_alloc(MAC_LABEL)) == NULL) ||
923 (str_to_label(strval, &new_sl, MAC_LABEL,
924 L_NO_CORRECTION, NULL) == -1)) {
925 goto badlabel;
926 }
927
928 /* Now translate to hex internal label string */
929 if (label_to_str(new_sl, &hex, M_INTERNAL,
930 DEF_NAMES) != 0) {
931 if (hex)
932 free(hex);
933 goto badlabel;
934 }
935 m_label_free(new_sl);
936
937 /* If string is already in internal form, we're done. */
938 if (strcmp(strval, hex) == 0) {
939 free(hex);
940 break;
941 }
942
943 /* Replace the label string with the internal form. */
944 (void) nvlist_remove(ret, zfs_prop_to_name(prop),
945 DATA_TYPE_STRING);
946 verify(nvlist_add_string(ret, zfs_prop_to_name(prop),
947 hex) == 0);
948 free(hex);
949
950 break;
951
952 badlabel:
953 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
954 "invalid mlslabel '%s'"), strval);
955 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
956 m_label_free(new_sl); /* OK if null */
957 goto error;
958 #else
959 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
960 "mlslabels are unsupported"));
961 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
962 goto error;
963 #endif /* HAVE_MLSLABEL */
964 }
965
966 case ZFS_PROP_MOUNTPOINT:
967 {
968 namecheck_err_t why;
969
970 if (strcmp(strval, ZFS_MOUNTPOINT_NONE) == 0 ||
971 strcmp(strval, ZFS_MOUNTPOINT_LEGACY) == 0)
972 break;
973
974 if (mountpoint_namecheck(strval, &why)) {
975 switch (why) {
976 case NAME_ERR_LEADING_SLASH:
977 zfs_error_aux(hdl,
978 dgettext(TEXT_DOMAIN,
979 "'%s' must be an absolute path, "
980 "'none', or 'legacy'"), propname);
981 break;
982 case NAME_ERR_TOOLONG:
983 zfs_error_aux(hdl,
984 dgettext(TEXT_DOMAIN,
985 "component of '%s' is too long"),
986 propname);
987 break;
988 default:
989 break;
990 }
991 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
992 goto error;
993 }
994 }
995
996 /*FALLTHRU*/
997
998 case ZFS_PROP_SHARESMB:
999 case ZFS_PROP_SHARENFS:
1000 /*
1001 * For the mountpoint and sharenfs or sharesmb
1002 * properties, check if it can be set in a
1003 * global/non-global zone based on
1004 * the zoned property value:
1005 *
1006 * global zone non-global zone
1007 * --------------------------------------------------
1008 * zoned=on mountpoint (no) mountpoint (yes)
1009 * sharenfs (no) sharenfs (no)
1010 * sharesmb (no) sharesmb (no)
1011 *
1012 * zoned=off mountpoint (yes) N/A
1013 * sharenfs (yes)
1014 * sharesmb (yes)
1015 */
1016 if (zoned) {
1017 if (getzoneid() == GLOBAL_ZONEID) {
1018 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1019 "'%s' cannot be set on "
1020 "dataset in a non-global zone"),
1021 propname);
1022 (void) zfs_error(hdl, EZFS_ZONED,
1023 errbuf);
1024 goto error;
1025 } else if (prop == ZFS_PROP_SHARENFS ||
1026 prop == ZFS_PROP_SHARESMB) {
1027 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1028 "'%s' cannot be set in "
1029 "a non-global zone"), propname);
1030 (void) zfs_error(hdl, EZFS_ZONED,
1031 errbuf);
1032 goto error;
1033 }
1034 } else if (getzoneid() != GLOBAL_ZONEID) {
1035 /*
1036 * If zoned property is 'off', this must be in
1037 * a global zone. If not, something is wrong.
1038 */
1039 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1040 "'%s' cannot be set while dataset "
1041 "'zoned' property is set"), propname);
1042 (void) zfs_error(hdl, EZFS_ZONED, errbuf);
1043 goto error;
1044 }
1045
1046 /*
1047 * At this point, it is legitimate to set the
1048 * property. Now we want to make sure that the
1049 * property value is valid if it is sharenfs.
1050 */
1051 if ((prop == ZFS_PROP_SHARENFS ||
1052 prop == ZFS_PROP_SHARESMB) &&
1053 strcmp(strval, "on") != 0 &&
1054 strcmp(strval, "off") != 0) {
1055 zfs_share_proto_t proto;
1056
1057 if (prop == ZFS_PROP_SHARESMB)
1058 proto = PROTO_SMB;
1059 else
1060 proto = PROTO_NFS;
1061
1062 /*
1063 * Must be an valid sharing protocol
1064 * option string so init the libshare
1065 * in order to enable the parser and
1066 * then parse the options. We use the
1067 * control API since we don't care about
1068 * the current configuration and don't
1069 * want the overhead of loading it
1070 * until we actually do something.
1071 */
1072
1073 if (zfs_init_libshare(hdl,
1074 SA_INIT_CONTROL_API) != SA_OK) {
1075 /*
1076 * An error occurred so we can't do
1077 * anything
1078 */
1079 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1080 "'%s' cannot be set: problem "
1081 "in share initialization"),
1082 propname);
1083 (void) zfs_error(hdl, EZFS_BADPROP,
1084 errbuf);
1085 goto error;
1086 }
1087
1088 if (zfs_parse_options(strval, proto) != SA_OK) {
1089 /*
1090 * There was an error in parsing so
1091 * deal with it by issuing an error
1092 * message and leaving after
1093 * uninitializing the the libshare
1094 * interface.
1095 */
1096 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1097 "'%s' cannot be set to invalid "
1098 "options"), propname);
1099 (void) zfs_error(hdl, EZFS_BADPROP,
1100 errbuf);
1101 zfs_uninit_libshare(hdl);
1102 goto error;
1103 }
1104 zfs_uninit_libshare(hdl);
1105 }
1106
1107 break;
1108 case ZFS_PROP_UTF8ONLY:
1109 chosen_utf = (int)intval;
1110 break;
1111 case ZFS_PROP_NORMALIZE:
1112 chosen_normal = (int)intval;
1113 break;
1114 default:
1115 break;
1116 }
1117
1118 /*
1119 * For changes to existing volumes, we have some additional
1120 * checks to enforce.
1121 */
1122 if (type == ZFS_TYPE_VOLUME && zhp != NULL) {
1123 uint64_t volsize = zfs_prop_get_int(zhp,
1124 ZFS_PROP_VOLSIZE);
1125 uint64_t blocksize = zfs_prop_get_int(zhp,
1126 ZFS_PROP_VOLBLOCKSIZE);
1127 char buf[64];
1128
1129 switch (prop) {
1130 case ZFS_PROP_RESERVATION:
1131 case ZFS_PROP_REFRESERVATION:
1132 if (intval > volsize) {
1133 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1134 "'%s' is greater than current "
1135 "volume size"), propname);
1136 (void) zfs_error(hdl, EZFS_BADPROP,
1137 errbuf);
1138 goto error;
1139 }
1140 break;
1141
1142 case ZFS_PROP_VOLSIZE:
1143 if (intval % blocksize != 0) {
1144 zfs_nicenum(blocksize, buf,
1145 sizeof (buf));
1146 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1147 "'%s' must be a multiple of "
1148 "volume block size (%s)"),
1149 propname, buf);
1150 (void) zfs_error(hdl, EZFS_BADPROP,
1151 errbuf);
1152 goto error;
1153 }
1154
1155 if (intval == 0) {
1156 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1157 "'%s' cannot be zero"),
1158 propname);
1159 (void) zfs_error(hdl, EZFS_BADPROP,
1160 errbuf);
1161 goto error;
1162 }
1163 break;
1164 default:
1165 break;
1166 }
1167 }
1168 }
1169
1170 /*
1171 * If normalization was chosen, but no UTF8 choice was made,
1172 * enforce rejection of non-UTF8 names.
1173 *
1174 * If normalization was chosen, but rejecting non-UTF8 names
1175 * was explicitly not chosen, it is an error.
1176 */
1177 if (chosen_normal > 0 && chosen_utf < 0) {
1178 if (nvlist_add_uint64(ret,
1179 zfs_prop_to_name(ZFS_PROP_UTF8ONLY), 1) != 0) {
1180 (void) no_memory(hdl);
1181 goto error;
1182 }
1183 } else if (chosen_normal > 0 && chosen_utf == 0) {
1184 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1185 "'%s' must be set 'on' if normalization chosen"),
1186 zfs_prop_to_name(ZFS_PROP_UTF8ONLY));
1187 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1188 goto error;
1189 }
1190 return (ret);
1191
1192 error:
1193 nvlist_free(ret);
1194 return (NULL);
1195 }
1196
1197 int
1198 zfs_add_synthetic_resv(zfs_handle_t *zhp, nvlist_t *nvl)
1199 {
1200 uint64_t old_volsize;
1201 uint64_t new_volsize;
1202 uint64_t old_reservation;
1203 uint64_t new_reservation;
1204 zfs_prop_t resv_prop;
1205
1206 /*
1207 * If this is an existing volume, and someone is setting the volsize,
1208 * make sure that it matches the reservation, or add it if necessary.
1209 */
1210 old_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE);
1211 if (zfs_which_resv_prop(zhp, &resv_prop) < 0)
1212 return (-1);
1213 old_reservation = zfs_prop_get_int(zhp, resv_prop);
1214 if ((zvol_volsize_to_reservation(old_volsize, zhp->zfs_props) !=
1215 old_reservation) || nvlist_lookup_uint64(nvl,
1216 zfs_prop_to_name(resv_prop), &new_reservation) != ENOENT) {
1217 return (0);
1218 }
1219 if (nvlist_lookup_uint64(nvl, zfs_prop_to_name(ZFS_PROP_VOLSIZE),
1220 &new_volsize) != 0)
1221 return (-1);
1222 new_reservation = zvol_volsize_to_reservation(new_volsize,
1223 zhp->zfs_props);
1224 if (nvlist_add_uint64(nvl, zfs_prop_to_name(resv_prop),
1225 new_reservation) != 0) {
1226 (void) no_memory(zhp->zfs_hdl);
1227 return (-1);
1228 }
1229 return (1);
1230 }
1231
1232 void
1233 zfs_setprop_error(libzfs_handle_t *hdl, zfs_prop_t prop, int err,
1234 char *errbuf)
1235 {
1236 switch (err) {
1237
1238 case ENOSPC:
1239 /*
1240 * For quotas and reservations, ENOSPC indicates
1241 * something different; setting a quota or reservation
1242 * doesn't use any disk space.
1243 */
1244 switch (prop) {
1245 case ZFS_PROP_QUOTA:
1246 case ZFS_PROP_REFQUOTA:
1247 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1248 "size is less than current used or "
1249 "reserved space"));
1250 (void) zfs_error(hdl, EZFS_PROPSPACE, errbuf);
1251 break;
1252
1253 case ZFS_PROP_RESERVATION:
1254 case ZFS_PROP_REFRESERVATION:
1255 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1256 "size is greater than available space"));
1257 (void) zfs_error(hdl, EZFS_PROPSPACE, errbuf);
1258 break;
1259
1260 default:
1261 (void) zfs_standard_error(hdl, err, errbuf);
1262 break;
1263 }
1264 break;
1265
1266 case EBUSY:
1267 (void) zfs_standard_error(hdl, EBUSY, errbuf);
1268 break;
1269
1270 case EROFS:
1271 (void) zfs_error(hdl, EZFS_DSREADONLY, errbuf);
1272 break;
1273
1274 case ENOTSUP:
1275 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1276 "pool and or dataset must be upgraded to set this "
1277 "property or value"));
1278 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf);
1279 break;
1280
1281 case ERANGE:
1282 if (prop == ZFS_PROP_COMPRESSION) {
1283 (void) zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1284 "property setting is not allowed on "
1285 "bootable datasets"));
1286 (void) zfs_error(hdl, EZFS_NOTSUP, errbuf);
1287 } else {
1288 (void) zfs_standard_error(hdl, err, errbuf);
1289 }
1290 break;
1291
1292 case EINVAL:
1293 if (prop == ZPROP_INVAL) {
1294 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1295 } else {
1296 (void) zfs_standard_error(hdl, err, errbuf);
1297 }
1298 break;
1299
1300 case EOVERFLOW:
1301 /*
1302 * This platform can't address a volume this big.
1303 */
1304 #ifdef _ILP32
1305 if (prop == ZFS_PROP_VOLSIZE) {
1306 (void) zfs_error(hdl, EZFS_VOLTOOBIG, errbuf);
1307 break;
1308 }
1309 #endif
1310 /* FALLTHROUGH */
1311 default:
1312 (void) zfs_standard_error(hdl, err, errbuf);
1313 }
1314 }
1315
1316 static boolean_t
1317 zfs_is_namespace_prop(zfs_prop_t prop)
1318 {
1319 switch (prop) {
1320
1321 case ZFS_PROP_ATIME:
1322 case ZFS_PROP_DEVICES:
1323 case ZFS_PROP_EXEC:
1324 case ZFS_PROP_SETUID:
1325 case ZFS_PROP_READONLY:
1326 case ZFS_PROP_XATTR:
1327 case ZFS_PROP_NBMAND:
1328 return (B_TRUE);
1329
1330 default:
1331 return (B_FALSE);
1332 }
1333 }
1334
1335 /*
1336 * Given a property name and value, set the property for the given dataset.
1337 */
1338 int
1339 zfs_prop_set(zfs_handle_t *zhp, const char *propname, const char *propval)
1340 {
1341 zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
1342 int ret = -1;
1343 prop_changelist_t *cl = NULL;
1344 char errbuf[1024];
1345 libzfs_handle_t *hdl = zhp->zfs_hdl;
1346 nvlist_t *nvl = NULL, *realprops;
1347 zfs_prop_t prop;
1348 boolean_t do_prefix;
1349 uint64_t idx;
1350 int added_resv = 0;
1351
1352 (void) snprintf(errbuf, sizeof (errbuf),
1353 dgettext(TEXT_DOMAIN, "cannot set property for '%s'"),
1354 zhp->zfs_name);
1355
1356 if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0 ||
1357 nvlist_add_string(nvl, propname, propval) != 0) {
1358 (void) no_memory(hdl);
1359 goto error;
1360 }
1361
1362 if ((realprops = zfs_valid_proplist(hdl, zhp->zfs_type, nvl,
1363 zfs_prop_get_int(zhp, ZFS_PROP_ZONED), zhp, errbuf)) == NULL)
1364 goto error;
1365
1366 nvlist_free(nvl);
1367 nvl = realprops;
1368
1369 prop = zfs_name_to_prop(propname);
1370
1371 if (prop == ZFS_PROP_VOLSIZE) {
1372 if ((added_resv = zfs_add_synthetic_resv(zhp, nvl)) == -1)
1373 goto error;
1374 }
1375
1376 if ((cl = changelist_gather(zhp, prop, 0, 0)) == NULL)
1377 goto error;
1378
1379 if (prop == ZFS_PROP_MOUNTPOINT && changelist_haszonedchild(cl)) {
1380 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1381 "child dataset with inherited mountpoint is used "
1382 "in a non-global zone"));
1383 ret = zfs_error(hdl, EZFS_ZONED, errbuf);
1384 goto error;
1385 }
1386
1387 /*
1388 * If the dataset's canmount property is being set to noauto,
1389 * then we want to prevent unmounting & remounting it.
1390 */
1391 do_prefix = !((prop == ZFS_PROP_CANMOUNT) &&
1392 (zprop_string_to_index(prop, propval, &idx,
1393 ZFS_TYPE_DATASET) == 0) && (idx == ZFS_CANMOUNT_NOAUTO));
1394
1395 if (do_prefix && (ret = changelist_prefix(cl)) != 0)
1396 goto error;
1397
1398 /*
1399 * Execute the corresponding ioctl() to set this property.
1400 */
1401 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
1402
1403 if (zcmd_write_src_nvlist(hdl, &zc, nvl) != 0)
1404 goto error;
1405
1406 ret = zfs_ioctl(hdl, ZFS_IOC_SET_PROP, &zc);
1407
1408 if (ret != 0) {
1409 zfs_setprop_error(hdl, prop, errno, errbuf);
1410 if (added_resv && errno == ENOSPC) {
1411 /* clean up the volsize property we tried to set */
1412 uint64_t old_volsize = zfs_prop_get_int(zhp,
1413 ZFS_PROP_VOLSIZE);
1414 nvlist_free(nvl);
1415 zcmd_free_nvlists(&zc);
1416 if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0)
1417 goto error;
1418 if (nvlist_add_uint64(nvl,
1419 zfs_prop_to_name(ZFS_PROP_VOLSIZE),
1420 old_volsize) != 0)
1421 goto error;
1422 if (zcmd_write_src_nvlist(hdl, &zc, nvl) != 0)
1423 goto error;
1424 (void) zfs_ioctl(hdl, ZFS_IOC_SET_PROP, &zc);
1425 }
1426 } else {
1427 if (do_prefix)
1428 ret = changelist_postfix(cl);
1429
1430 if (ret == 0) {
1431 /*
1432 * Refresh the statistics so the new property
1433 * value is reflected.
1434 */
1435 (void) get_stats(zhp);
1436
1437 /*
1438 * Remount the filesystem to propagate the change
1439 * if one of the options handled by the generic
1440 * Linux namespace layer has been modified.
1441 */
1442 if (zfs_is_namespace_prop(prop) &&
1443 zfs_is_mounted(zhp, NULL))
1444 ret = zfs_mount(zhp, MNTOPT_REMOUNT, 0);
1445 }
1446 }
1447
1448 error:
1449 nvlist_free(nvl);
1450 zcmd_free_nvlists(&zc);
1451 if (cl)
1452 changelist_free(cl);
1453 return (ret);
1454 }
1455
1456 /*
1457 * Given a property, inherit the value from the parent dataset, or if received
1458 * is TRUE, revert to the received value, if any.
1459 */
1460 int
1461 zfs_prop_inherit(zfs_handle_t *zhp, const char *propname, boolean_t received)
1462 {
1463 zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
1464 int ret;
1465 prop_changelist_t *cl;
1466 libzfs_handle_t *hdl = zhp->zfs_hdl;
1467 char errbuf[1024];
1468 zfs_prop_t prop;
1469
1470 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
1471 "cannot inherit %s for '%s'"), propname, zhp->zfs_name);
1472
1473 zc.zc_cookie = received;
1474 if ((prop = zfs_name_to_prop(propname)) == ZPROP_INVAL) {
1475 /*
1476 * For user properties, the amount of work we have to do is very
1477 * small, so just do it here.
1478 */
1479 if (!zfs_prop_user(propname)) {
1480 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1481 "invalid property"));
1482 return (zfs_error(hdl, EZFS_BADPROP, errbuf));
1483 }
1484
1485 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
1486 (void) strlcpy(zc.zc_value, propname, sizeof (zc.zc_value));
1487
1488 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_INHERIT_PROP, &zc) != 0)
1489 return (zfs_standard_error(hdl, errno, errbuf));
1490
1491 return (0);
1492 }
1493
1494 /*
1495 * Verify that this property is inheritable.
1496 */
1497 if (zfs_prop_readonly(prop))
1498 return (zfs_error(hdl, EZFS_PROPREADONLY, errbuf));
1499
1500 if (!zfs_prop_inheritable(prop) && !received)
1501 return (zfs_error(hdl, EZFS_PROPNONINHERIT, errbuf));
1502
1503 /*
1504 * Check to see if the value applies to this type
1505 */
1506 if (!zfs_prop_valid_for_type(prop, zhp->zfs_type))
1507 return (zfs_error(hdl, EZFS_PROPTYPE, errbuf));
1508
1509 /*
1510 * Normalize the name, to get rid of shorthand abbreviations.
1511 */
1512 propname = zfs_prop_to_name(prop);
1513 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
1514 (void) strlcpy(zc.zc_value, propname, sizeof (zc.zc_value));
1515
1516 if (prop == ZFS_PROP_MOUNTPOINT && getzoneid() == GLOBAL_ZONEID &&
1517 zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) {
1518 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1519 "dataset is used in a non-global zone"));
1520 return (zfs_error(hdl, EZFS_ZONED, errbuf));
1521 }
1522
1523 /*
1524 * Determine datasets which will be affected by this change, if any.
1525 */
1526 if ((cl = changelist_gather(zhp, prop, 0, 0)) == NULL)
1527 return (-1);
1528
1529 if (prop == ZFS_PROP_MOUNTPOINT && changelist_haszonedchild(cl)) {
1530 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1531 "child dataset with inherited mountpoint is used "
1532 "in a non-global zone"));
1533 ret = zfs_error(hdl, EZFS_ZONED, errbuf);
1534 goto error;
1535 }
1536
1537 if ((ret = changelist_prefix(cl)) != 0)
1538 goto error;
1539
1540 if ((ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_INHERIT_PROP, &zc)) != 0) {
1541 return (zfs_standard_error(hdl, errno, errbuf));
1542 } else {
1543
1544 if ((ret = changelist_postfix(cl)) != 0)
1545 goto error;
1546
1547 /*
1548 * Refresh the statistics so the new property is reflected.
1549 */
1550 (void) get_stats(zhp);
1551 }
1552
1553 error:
1554 changelist_free(cl);
1555 return (ret);
1556 }
1557
1558 /*
1559 * True DSL properties are stored in an nvlist. The following two functions
1560 * extract them appropriately.
1561 */
1562 uint64_t
1563 getprop_uint64(zfs_handle_t *zhp, zfs_prop_t prop, char **source)
1564 {
1565 nvlist_t *nv;
1566 uint64_t value;
1567
1568 *source = NULL;
1569 if (nvlist_lookup_nvlist(zhp->zfs_props,
1570 zfs_prop_to_name(prop), &nv) == 0) {
1571 verify(nvlist_lookup_uint64(nv, ZPROP_VALUE, &value) == 0);
1572 (void) nvlist_lookup_string(nv, ZPROP_SOURCE, source);
1573 } else {
1574 verify(!zhp->zfs_props_table ||
1575 zhp->zfs_props_table[prop] == B_TRUE);
1576 value = zfs_prop_default_numeric(prop);
1577 *source = "";
1578 }
1579
1580 return (value);
1581 }
1582
1583 static char *
1584 getprop_string(zfs_handle_t *zhp, zfs_prop_t prop, char **source)
1585 {
1586 nvlist_t *nv;
1587 char *value;
1588
1589 *source = NULL;
1590 if (nvlist_lookup_nvlist(zhp->zfs_props,
1591 zfs_prop_to_name(prop), &nv) == 0) {
1592 verify(nvlist_lookup_string(nv, ZPROP_VALUE, &value) == 0);
1593 (void) nvlist_lookup_string(nv, ZPROP_SOURCE, source);
1594 } else {
1595 verify(!zhp->zfs_props_table ||
1596 zhp->zfs_props_table[prop] == B_TRUE);
1597 if ((value = (char *)zfs_prop_default_string(prop)) == NULL)
1598 value = "";
1599 *source = "";
1600 }
1601
1602 return (value);
1603 }
1604
1605 static boolean_t
1606 zfs_is_recvd_props_mode(zfs_handle_t *zhp)
1607 {
1608 return (zhp->zfs_props == zhp->zfs_recvd_props);
1609 }
1610
1611 static void
1612 zfs_set_recvd_props_mode(zfs_handle_t *zhp, uint64_t *cookie)
1613 {
1614 *cookie = (uint64_t)(uintptr_t)zhp->zfs_props;
1615 zhp->zfs_props = zhp->zfs_recvd_props;
1616 }
1617
1618 static void
1619 zfs_unset_recvd_props_mode(zfs_handle_t *zhp, uint64_t *cookie)
1620 {
1621 zhp->zfs_props = (nvlist_t *)(uintptr_t)*cookie;
1622 *cookie = 0;
1623 }
1624
1625 /*
1626 * Internal function for getting a numeric property. Both zfs_prop_get() and
1627 * zfs_prop_get_int() are built using this interface.
1628 *
1629 * Certain properties can be overridden using 'mount -o'. In this case, scan
1630 * the contents of the /etc/mtab entry, searching for the appropriate options.
1631 * If they differ from the on-disk values, report the current values and mark
1632 * the source "temporary".
1633 */
1634 static int
1635 get_numeric_property(zfs_handle_t *zhp, zfs_prop_t prop, zprop_source_t *src,
1636 char **source, uint64_t *val)
1637 {
1638 zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
1639 nvlist_t *zplprops = NULL;
1640 struct mnttab mnt;
1641 char *mntopt_on = NULL;
1642 char *mntopt_off = NULL;
1643 boolean_t received = zfs_is_recvd_props_mode(zhp);
1644
1645 *source = NULL;
1646
1647 switch (prop) {
1648 case ZFS_PROP_ATIME:
1649 mntopt_on = MNTOPT_ATIME;
1650 mntopt_off = MNTOPT_NOATIME;
1651 break;
1652
1653 case ZFS_PROP_DEVICES:
1654 mntopt_on = MNTOPT_DEVICES;
1655 mntopt_off = MNTOPT_NODEVICES;
1656 break;
1657
1658 case ZFS_PROP_EXEC:
1659 mntopt_on = MNTOPT_EXEC;
1660 mntopt_off = MNTOPT_NOEXEC;
1661 break;
1662
1663 case ZFS_PROP_READONLY:
1664 mntopt_on = MNTOPT_RO;
1665 mntopt_off = MNTOPT_RW;
1666 break;
1667
1668 case ZFS_PROP_SETUID:
1669 mntopt_on = MNTOPT_SETUID;
1670 mntopt_off = MNTOPT_NOSETUID;
1671 break;
1672
1673 case ZFS_PROP_XATTR:
1674 mntopt_on = MNTOPT_XATTR;
1675 mntopt_off = MNTOPT_NOXATTR;
1676 break;
1677
1678 case ZFS_PROP_NBMAND:
1679 mntopt_on = MNTOPT_NBMAND;
1680 mntopt_off = MNTOPT_NONBMAND;
1681 break;
1682 default:
1683 break;
1684 }
1685
1686 /*
1687 * Because looking up the mount options is potentially expensive
1688 * (iterating over all of /etc/mtab), we defer its calculation until
1689 * we're looking up a property which requires its presence.
1690 */
1691 if (!zhp->zfs_mntcheck &&
1692 (mntopt_on != NULL || prop == ZFS_PROP_MOUNTED)) {
1693 libzfs_handle_t *hdl = zhp->zfs_hdl;
1694 struct mnttab entry;
1695
1696 if (libzfs_mnttab_find(hdl, zhp->zfs_name, &entry) == 0) {
1697 zhp->zfs_mntopts = zfs_strdup(hdl,
1698 entry.mnt_mntopts);
1699 if (zhp->zfs_mntopts == NULL)
1700 return (-1);
1701 }
1702
1703 zhp->zfs_mntcheck = B_TRUE;
1704 }
1705
1706 if (zhp->zfs_mntopts == NULL)
1707 mnt.mnt_mntopts = "";
1708 else
1709 mnt.mnt_mntopts = zhp->zfs_mntopts;
1710
1711 switch (prop) {
1712 case ZFS_PROP_ATIME:
1713 case ZFS_PROP_DEVICES:
1714 case ZFS_PROP_EXEC:
1715 case ZFS_PROP_READONLY:
1716 case ZFS_PROP_SETUID:
1717 case ZFS_PROP_XATTR:
1718 case ZFS_PROP_NBMAND:
1719 *val = getprop_uint64(zhp, prop, source);
1720
1721 if (received)
1722 break;
1723
1724 if (hasmntopt(&mnt, mntopt_on) && !*val) {
1725 *val = B_TRUE;
1726 if (src)
1727 *src = ZPROP_SRC_TEMPORARY;
1728 } else if (hasmntopt(&mnt, mntopt_off) && *val) {
1729 *val = B_FALSE;
1730 if (src)
1731 *src = ZPROP_SRC_TEMPORARY;
1732 }
1733 break;
1734
1735 case ZFS_PROP_CANMOUNT:
1736 case ZFS_PROP_VOLSIZE:
1737 case ZFS_PROP_QUOTA:
1738 case ZFS_PROP_REFQUOTA:
1739 case ZFS_PROP_RESERVATION:
1740 case ZFS_PROP_REFRESERVATION:
1741 *val = getprop_uint64(zhp, prop, source);
1742
1743 if (*source == NULL) {
1744 /* not default, must be local */
1745 *source = zhp->zfs_name;
1746 }
1747 break;
1748
1749 case ZFS_PROP_MOUNTED:
1750 *val = (zhp->zfs_mntopts != NULL);
1751 break;
1752
1753 case ZFS_PROP_NUMCLONES:
1754 *val = zhp->zfs_dmustats.dds_num_clones;
1755 break;
1756
1757 case ZFS_PROP_VERSION:
1758 case ZFS_PROP_NORMALIZE:
1759 case ZFS_PROP_UTF8ONLY:
1760 case ZFS_PROP_CASE:
1761 if (!zfs_prop_valid_for_type(prop, zhp->zfs_head_type) ||
1762 zcmd_alloc_dst_nvlist(zhp->zfs_hdl, &zc, 0) != 0)
1763 return (-1);
1764 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
1765 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_OBJSET_ZPLPROPS, &zc)) {
1766 zcmd_free_nvlists(&zc);
1767 return (-1);
1768 }
1769 if (zcmd_read_dst_nvlist(zhp->zfs_hdl, &zc, &zplprops) != 0 ||
1770 nvlist_lookup_uint64(zplprops, zfs_prop_to_name(prop),
1771 val) != 0) {
1772 zcmd_free_nvlists(&zc);
1773 return (-1);
1774 }
1775 if (zplprops)
1776 nvlist_free(zplprops);
1777 zcmd_free_nvlists(&zc);
1778 break;
1779
1780 default:
1781 switch (zfs_prop_get_type(prop)) {
1782 case PROP_TYPE_NUMBER:
1783 case PROP_TYPE_INDEX:
1784 *val = getprop_uint64(zhp, prop, source);
1785 /*
1786 * If we tried to use a default value for a
1787 * readonly property, it means that it was not
1788 * present.
1789 */
1790 if (zfs_prop_readonly(prop) &&
1791 *source != NULL && (*source)[0] == '\0') {
1792 *source = NULL;
1793 }
1794 break;
1795
1796 case PROP_TYPE_STRING:
1797 default:
1798 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
1799 "cannot get non-numeric property"));
1800 return (zfs_error(zhp->zfs_hdl, EZFS_BADPROP,
1801 dgettext(TEXT_DOMAIN, "internal error")));
1802 }
1803 }
1804
1805 return (0);
1806 }
1807
1808 /*
1809 * Calculate the source type, given the raw source string.
1810 */
1811 static void
1812 get_source(zfs_handle_t *zhp, zprop_source_t *srctype, char *source,
1813 char *statbuf, size_t statlen)
1814 {
1815 if (statbuf == NULL || *srctype == ZPROP_SRC_TEMPORARY)
1816 return;
1817
1818 if (source == NULL) {
1819 *srctype = ZPROP_SRC_NONE;
1820 } else if (source[0] == '\0') {
1821 *srctype = ZPROP_SRC_DEFAULT;
1822 } else if (strstr(source, ZPROP_SOURCE_VAL_RECVD) != NULL) {
1823 *srctype = ZPROP_SRC_RECEIVED;
1824 } else {
1825 if (strcmp(source, zhp->zfs_name) == 0) {
1826 *srctype = ZPROP_SRC_LOCAL;
1827 } else {
1828 (void) strlcpy(statbuf, source, statlen);
1829 *srctype = ZPROP_SRC_INHERITED;
1830 }
1831 }
1832
1833 }
1834
1835 int
1836 zfs_prop_get_recvd(zfs_handle_t *zhp, const char *propname, char *propbuf,
1837 size_t proplen, boolean_t literal)
1838 {
1839 zfs_prop_t prop;
1840 int err = 0;
1841
1842 if (zhp->zfs_recvd_props == NULL)
1843 if (get_recvd_props_ioctl(zhp) != 0)
1844 return (-1);
1845
1846 prop = zfs_name_to_prop(propname);
1847
1848 if (prop != ZPROP_INVAL) {
1849 uint64_t cookie;
1850 if (!nvlist_exists(zhp->zfs_recvd_props, propname))
1851 return (-1);
1852 zfs_set_recvd_props_mode(zhp, &cookie);
1853 err = zfs_prop_get(zhp, prop, propbuf, proplen,
1854 NULL, NULL, 0, literal);
1855 zfs_unset_recvd_props_mode(zhp, &cookie);
1856 } else if (zfs_prop_userquota(propname)) {
1857 return (-1);
1858 } else {
1859 nvlist_t *propval;
1860 char *recvdval;
1861 if (nvlist_lookup_nvlist(zhp->zfs_recvd_props,
1862 propname, &propval) != 0)
1863 return (-1);
1864 verify(nvlist_lookup_string(propval, ZPROP_VALUE,
1865 &recvdval) == 0);
1866 (void) strlcpy(propbuf, recvdval, proplen);
1867 }
1868
1869 return (err == 0 ? 0 : -1);
1870 }
1871
1872 /*
1873 * Retrieve a property from the given object. If 'literal' is specified, then
1874 * numbers are left as exact values. Otherwise, numbers are converted to a
1875 * human-readable form.
1876 *
1877 * Returns 0 on success, or -1 on error.
1878 */
1879 int
1880 zfs_prop_get(zfs_handle_t *zhp, zfs_prop_t prop, char *propbuf, size_t proplen,
1881 zprop_source_t *src, char *statbuf, size_t statlen, boolean_t literal)
1882 {
1883 char *source = NULL;
1884 uint64_t val;
1885 char *str;
1886 const char *strval;
1887 boolean_t received = zfs_is_recvd_props_mode(zhp);
1888
1889 /*
1890 * Check to see if this property applies to our object
1891 */
1892 if (!zfs_prop_valid_for_type(prop, zhp->zfs_type))
1893 return (-1);
1894
1895 if (received && zfs_prop_readonly(prop))
1896 return (-1);
1897
1898 if (src)
1899 *src = ZPROP_SRC_NONE;
1900
1901 switch (prop) {
1902 case ZFS_PROP_CREATION:
1903 /*
1904 * 'creation' is a time_t stored in the statistics. We convert
1905 * this into a string unless 'literal' is specified.
1906 */
1907 {
1908 val = getprop_uint64(zhp, prop, &source);
1909 time_t time = (time_t)val;
1910 struct tm t;
1911
1912 if (literal ||
1913 localtime_r(&time, &t) == NULL ||
1914 strftime(propbuf, proplen, "%a %b %e %k:%M %Y",
1915 &t) == 0)
1916 (void) snprintf(propbuf, proplen, "%llu", (u_longlong_t) val);
1917 }
1918 break;
1919
1920 case ZFS_PROP_MOUNTPOINT:
1921 /*
1922 * Getting the precise mountpoint can be tricky.
1923 *
1924 * - for 'none' or 'legacy', return those values.
1925 * - for inherited mountpoints, we want to take everything
1926 * after our ancestor and append it to the inherited value.
1927 *
1928 * If the pool has an alternate root, we want to prepend that
1929 * root to any values we return.
1930 */
1931
1932 str = getprop_string(zhp, prop, &source);
1933
1934 if (str[0] == '/') {
1935 char buf[MAXPATHLEN];
1936 char *root = buf;
1937 const char *relpath;
1938
1939 /*
1940 * If we inherit the mountpoint, even from a dataset
1941 * with a received value, the source will be the path of
1942 * the dataset we inherit from. If source is
1943 * ZPROP_SOURCE_VAL_RECVD, the received value is not
1944 * inherited.
1945 */
1946 if (strcmp(source, ZPROP_SOURCE_VAL_RECVD) == 0) {
1947 relpath = "";
1948 } else {
1949 relpath = zhp->zfs_name + strlen(source);
1950 if (relpath[0] == '/')
1951 relpath++;
1952 }
1953
1954 if ((zpool_get_prop(zhp->zpool_hdl,
1955 ZPOOL_PROP_ALTROOT, buf, MAXPATHLEN, NULL)) ||
1956 (strcmp(root, "-") == 0))
1957 root[0] = '\0';
1958 /*
1959 * Special case an alternate root of '/'. This will
1960 * avoid having multiple leading slashes in the
1961 * mountpoint path.
1962 */
1963 if (strcmp(root, "/") == 0)
1964 root++;
1965
1966 /*
1967 * If the mountpoint is '/' then skip over this
1968 * if we are obtaining either an alternate root or
1969 * an inherited mountpoint.
1970 */
1971 if (str[1] == '\0' && (root[0] != '\0' ||
1972 relpath[0] != '\0'))
1973 str++;
1974
1975 if (relpath[0] == '\0')
1976 (void) snprintf(propbuf, proplen, "%s%s",
1977 root, str);
1978 else
1979 (void) snprintf(propbuf, proplen, "%s%s%s%s",
1980 root, str, relpath[0] == '@' ? "" : "/",
1981 relpath);
1982 } else {
1983 /* 'legacy' or 'none' */
1984 (void) strlcpy(propbuf, str, proplen);
1985 }
1986
1987 break;
1988
1989 case ZFS_PROP_ORIGIN:
1990 (void) strlcpy(propbuf, getprop_string(zhp, prop, &source),
1991 proplen);
1992 /*
1993 * If there is no parent at all, return failure to indicate that
1994 * it doesn't apply to this dataset.
1995 */
1996 if (propbuf[0] == '\0')
1997 return (-1);
1998 break;
1999
2000 case ZFS_PROP_QUOTA:
2001 case ZFS_PROP_REFQUOTA:
2002 case ZFS_PROP_RESERVATION:
2003 case ZFS_PROP_REFRESERVATION:
2004
2005 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2006 return (-1);
2007
2008 /*
2009 * If quota or reservation is 0, we translate this into 'none'
2010 * (unless literal is set), and indicate that it's the default
2011 * value. Otherwise, we print the number nicely and indicate
2012 * that its set locally.
2013 */
2014 if (val == 0) {
2015 if (literal)
2016 (void) strlcpy(propbuf, "0", proplen);
2017 else
2018 (void) strlcpy(propbuf, "none", proplen);
2019 } else {
2020 if (literal)
2021 (void) snprintf(propbuf, proplen, "%llu",
2022 (u_longlong_t)val);
2023 else
2024 zfs_nicenum(val, propbuf, proplen);
2025 }
2026 break;
2027
2028 case ZFS_PROP_COMPRESSRATIO:
2029 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2030 return (-1);
2031 (void) snprintf(propbuf, proplen, "%llu.%02llux",
2032 (u_longlong_t)(val / 100),
2033 (u_longlong_t)(val % 100));
2034 break;
2035
2036 case ZFS_PROP_TYPE:
2037 switch (zhp->zfs_type) {
2038 case ZFS_TYPE_FILESYSTEM:
2039 str = "filesystem";
2040 break;
2041 case ZFS_TYPE_VOLUME:
2042 str = "volume";
2043 break;
2044 case ZFS_TYPE_SNAPSHOT:
2045 str = "snapshot";
2046 break;
2047 default:
2048 abort();
2049 }
2050 (void) snprintf(propbuf, proplen, "%s", str);
2051 break;
2052
2053 case ZFS_PROP_MOUNTED:
2054 /*
2055 * The 'mounted' property is a pseudo-property that described
2056 * whether the filesystem is currently mounted. Even though
2057 * it's a boolean value, the typical values of "on" and "off"
2058 * don't make sense, so we translate to "yes" and "no".
2059 */
2060 if (get_numeric_property(zhp, ZFS_PROP_MOUNTED,
2061 src, &source, &val) != 0)
2062 return (-1);
2063 if (val)
2064 (void) strlcpy(propbuf, "yes", proplen);
2065 else
2066 (void) strlcpy(propbuf, "no", proplen);
2067 break;
2068
2069 case ZFS_PROP_NAME:
2070 /*
2071 * The 'name' property is a pseudo-property derived from the
2072 * dataset name. It is presented as a real property to simplify
2073 * consumers.
2074 */
2075 (void) strlcpy(propbuf, zhp->zfs_name, proplen);
2076 break;
2077
2078 case ZFS_PROP_MLSLABEL:
2079 {
2080 #ifdef HAVE_MLSLABEL
2081 m_label_t *new_sl = NULL;
2082 char *ascii = NULL; /* human readable label */
2083
2084 (void) strlcpy(propbuf,
2085 getprop_string(zhp, prop, &source), proplen);
2086
2087 if (literal || (strcasecmp(propbuf,
2088 ZFS_MLSLABEL_DEFAULT) == 0))
2089 break;
2090
2091 /*
2092 * Try to translate the internal hex string to
2093 * human-readable output. If there are any
2094 * problems just use the hex string.
2095 */
2096
2097 if (str_to_label(propbuf, &new_sl, MAC_LABEL,
2098 L_NO_CORRECTION, NULL) == -1) {
2099 m_label_free(new_sl);
2100 break;
2101 }
2102
2103 if (label_to_str(new_sl, &ascii, M_LABEL,
2104 DEF_NAMES) != 0) {
2105 if (ascii)
2106 free(ascii);
2107 m_label_free(new_sl);
2108 break;
2109 }
2110 m_label_free(new_sl);
2111
2112 (void) strlcpy(propbuf, ascii, proplen);
2113 free(ascii);
2114 #else
2115 (void) strlcpy(propbuf,
2116 getprop_string(zhp, prop, &source), proplen);
2117 #endif /* HAVE_MLSLABEL */
2118 }
2119 break;
2120
2121 default:
2122 switch (zfs_prop_get_type(prop)) {
2123 case PROP_TYPE_NUMBER:
2124 if (get_numeric_property(zhp, prop, src,
2125 &source, &val) != 0)
2126 return (-1);
2127 if (literal)
2128 (void) snprintf(propbuf, proplen, "%llu",
2129 (u_longlong_t)val);
2130 else
2131 zfs_nicenum(val, propbuf, proplen);
2132 break;
2133
2134 case PROP_TYPE_STRING:
2135 (void) strlcpy(propbuf,
2136 getprop_string(zhp, prop, &source), proplen);
2137 break;
2138
2139 case PROP_TYPE_INDEX:
2140 if (get_numeric_property(zhp, prop, src,
2141 &source, &val) != 0)
2142 return (-1);
2143 if (zfs_prop_index_to_string(prop, val, &strval) != 0)
2144 return (-1);
2145 (void) strlcpy(propbuf, strval, proplen);
2146 break;
2147
2148 default:
2149 abort();
2150 }
2151 }
2152
2153 get_source(zhp, src, source, statbuf, statlen);
2154
2155 return (0);
2156 }
2157
2158 /*
2159 * Utility function to get the given numeric property. Does no validation that
2160 * the given property is the appropriate type; should only be used with
2161 * hard-coded property types.
2162 */
2163 uint64_t
2164 zfs_prop_get_int(zfs_handle_t *zhp, zfs_prop_t prop)
2165 {
2166 char *source;
2167 uint64_t val;
2168
2169 (void) get_numeric_property(zhp, prop, NULL, &source, &val);
2170
2171 return (val);
2172 }
2173
2174 int
2175 zfs_prop_set_int(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t val)
2176 {
2177 char buf[64];
2178
2179 (void) snprintf(buf, sizeof (buf), "%llu", (longlong_t)val);
2180 return (zfs_prop_set(zhp, zfs_prop_to_name(prop), buf));
2181 }
2182
2183 /*
2184 * Similar to zfs_prop_get(), but returns the value as an integer.
2185 */
2186 int
2187 zfs_prop_get_numeric(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t *value,
2188 zprop_source_t *src, char *statbuf, size_t statlen)
2189 {
2190 char *source;
2191
2192 /*
2193 * Check to see if this property applies to our object
2194 */
2195 if (!zfs_prop_valid_for_type(prop, zhp->zfs_type)) {
2196 return (zfs_error_fmt(zhp->zfs_hdl, EZFS_PROPTYPE,
2197 dgettext(TEXT_DOMAIN, "cannot get property '%s'"),
2198 zfs_prop_to_name(prop)));
2199 }
2200
2201 if (src)
2202 *src = ZPROP_SRC_NONE;
2203
2204 if (get_numeric_property(zhp, prop, src, &source, value) != 0)
2205 return (-1);
2206
2207 get_source(zhp, src, source, statbuf, statlen);
2208
2209 return (0);
2210 }
2211
2212 #ifdef HAVE_IDMAP
2213 static int
2214 idmap_id_to_numeric_domain_rid(uid_t id, boolean_t isuser,
2215 char **domainp, idmap_rid_t *ridp)
2216 {
2217 idmap_get_handle_t *get_hdl = NULL;
2218 idmap_stat status;
2219 int err = EINVAL;
2220
2221 if (idmap_get_create(&get_hdl) != IDMAP_SUCCESS)
2222 goto out;
2223
2224 if (isuser) {
2225 err = idmap_get_sidbyuid(get_hdl, id,
2226 IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status);
2227 } else {
2228 err = idmap_get_sidbygid(get_hdl, id,
2229 IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status);
2230 }
2231 if (err == IDMAP_SUCCESS &&
2232 idmap_get_mappings(get_hdl) == IDMAP_SUCCESS &&
2233 status == IDMAP_SUCCESS)
2234 err = 0;
2235 else
2236 err = EINVAL;
2237 out:
2238 if (get_hdl)
2239 idmap_get_destroy(get_hdl);
2240 return (err);
2241 }
2242 #endif /* HAVE_IDMAP */
2243
2244 /*
2245 * convert the propname into parameters needed by kernel
2246 * Eg: userquota@ahrens -> ZFS_PROP_USERQUOTA, "", 126829
2247 * Eg: userused@matt@domain -> ZFS_PROP_USERUSED, "S-1-123-456", 789
2248 */
2249 static int
2250 userquota_propname_decode(const char *propname, boolean_t zoned,
2251 zfs_userquota_prop_t *typep, char *domain, int domainlen, uint64_t *ridp)
2252 {
2253 zfs_userquota_prop_t type;
2254 char *cp, *end;
2255 char *numericsid = NULL;
2256 boolean_t isuser;
2257
2258 domain[0] = '\0';
2259
2260 /* Figure out the property type ({user|group}{quota|space}) */
2261 for (type = 0; type < ZFS_NUM_USERQUOTA_PROPS; type++) {
2262 if (strncmp(propname, zfs_userquota_prop_prefixes[type],
2263 strlen(zfs_userquota_prop_prefixes[type])) == 0)
2264 break;
2265 }
2266 if (type == ZFS_NUM_USERQUOTA_PROPS)
2267 return (EINVAL);
2268 *typep = type;
2269
2270 isuser = (type == ZFS_PROP_USERQUOTA ||
2271 type == ZFS_PROP_USERUSED);
2272
2273 cp = strchr(propname, '@') + 1;
2274
2275 if (strchr(cp, '@')) {
2276 #ifdef HAVE_IDMAP
2277 /*
2278 * It's a SID name (eg "user@domain") that needs to be
2279 * turned into S-1-domainID-RID.
2280 */
2281 directory_error_t e;
2282 if (zoned && getzoneid() == GLOBAL_ZONEID)
2283 return (ENOENT);
2284 if (isuser) {
2285 e = directory_sid_from_user_name(NULL,
2286 cp, &numericsid);
2287 } else {
2288 e = directory_sid_from_group_name(NULL,
2289 cp, &numericsid);
2290 }
2291 if (e != NULL) {
2292 directory_error_free(e);
2293 return (ENOENT);
2294 }
2295 if (numericsid == NULL)
2296 return (ENOENT);
2297 cp = numericsid;
2298 /* will be further decoded below */
2299 #else
2300 return (ENOSYS);
2301 #endif /* HAVE_IDMAP */
2302 }
2303
2304 if (strncmp(cp, "S-1-", 4) == 0) {
2305 /* It's a numeric SID (eg "S-1-234-567-89") */
2306 (void) strlcpy(domain, cp, domainlen);
2307 cp = strrchr(domain, '-');
2308 *cp = '\0';
2309 cp++;
2310
2311 errno = 0;
2312 *ridp = strtoull(cp, &end, 10);
2313 if (numericsid) {
2314 free(numericsid);
2315 numericsid = NULL;
2316 }
2317 if (errno != 0 || *end != '\0')
2318 return (EINVAL);
2319 } else if (!isdigit(*cp)) {
2320 /*
2321 * It's a user/group name (eg "user") that needs to be
2322 * turned into a uid/gid
2323 */
2324 if (zoned && getzoneid() == GLOBAL_ZONEID)
2325 return (ENOENT);
2326 if (isuser) {
2327 struct passwd *pw;
2328 pw = getpwnam(cp);
2329 if (pw == NULL)
2330 return (ENOENT);
2331 *ridp = pw->pw_uid;
2332 } else {
2333 struct group *gr;
2334 gr = getgrnam(cp);
2335 if (gr == NULL)
2336 return (ENOENT);
2337 *ridp = gr->gr_gid;
2338 }
2339 } else {
2340 #ifdef HAVE_IDMAP
2341 /* It's a user/group ID (eg "12345"). */
2342 uid_t id = strtoul(cp, &end, 10);
2343 idmap_rid_t rid;
2344 char *mapdomain;
2345
2346 if (*end != '\0')
2347 return (EINVAL);
2348 if (id > MAXUID) {
2349 /* It's an ephemeral ID. */
2350 if (idmap_id_to_numeric_domain_rid(id, isuser,
2351 &mapdomain, &rid) != 0)
2352 return (ENOENT);
2353 (void) strlcpy(domain, mapdomain, domainlen);
2354 *ridp = rid;
2355 } else {
2356 *ridp = id;
2357 }
2358 #else
2359 return (ENOSYS);
2360 #endif /* HAVE_IDMAP */
2361 }
2362
2363 ASSERT3P(numericsid, ==, NULL);
2364 return (0);
2365 }
2366
2367 static int
2368 zfs_prop_get_userquota_common(zfs_handle_t *zhp, const char *propname,
2369 uint64_t *propvalue, zfs_userquota_prop_t *typep)
2370 {
2371 int err;
2372 zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
2373
2374 (void) strncpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
2375
2376 err = userquota_propname_decode(propname,
2377 zfs_prop_get_int(zhp, ZFS_PROP_ZONED),
2378 typep, zc.zc_value, sizeof (zc.zc_value), &zc.zc_guid);
2379 zc.zc_objset_type = *typep;
2380 if (err)
2381 return (err);
2382
2383 err = ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_USERSPACE_ONE, &zc);
2384 if (err)
2385 return (err);
2386
2387 *propvalue = zc.zc_cookie;
2388 return (0);
2389 }
2390
2391 int
2392 zfs_prop_get_userquota_int(zfs_handle_t *zhp, const char *propname,
2393 uint64_t *propvalue)
2394 {
2395 zfs_userquota_prop_t type;
2396
2397 return (zfs_prop_get_userquota_common(zhp, propname, propvalue,
2398 &type));
2399 }
2400
2401 int
2402 zfs_prop_get_userquota(zfs_handle_t *zhp, const char *propname,
2403 char *propbuf, int proplen, boolean_t literal)
2404 {
2405 int err;
2406 uint64_t propvalue;
2407 zfs_userquota_prop_t type;
2408
2409 err = zfs_prop_get_userquota_common(zhp, propname, &propvalue,
2410 &type);
2411
2412 if (err)
2413 return (err);
2414
2415 if (literal) {
2416 (void) snprintf(propbuf, proplen, "%llu",
2417 (u_longlong_t)propvalue);
2418 } else if (propvalue == 0 &&
2419 (type == ZFS_PROP_USERQUOTA || type == ZFS_PROP_GROUPQUOTA)) {
2420 (void) strlcpy(propbuf, "none", proplen);
2421 } else {
2422 zfs_nicenum(propvalue, propbuf, proplen);
2423 }
2424 return (0);
2425 }
2426
2427 /*
2428 * Returns the name of the given zfs handle.
2429 */
2430 const char *
2431 zfs_get_name(const zfs_handle_t *zhp)
2432 {
2433 return (zhp->zfs_name);
2434 }
2435
2436 /*
2437 * Returns the type of the given zfs handle.
2438 */
2439 zfs_type_t
2440 zfs_get_type(const zfs_handle_t *zhp)
2441 {
2442 return (zhp->zfs_type);
2443 }
2444
2445 static int
2446 zfs_do_list_ioctl(zfs_handle_t *zhp, int arg, zfs_cmd_t *zc)
2447 {
2448 int rc;
2449 uint64_t orig_cookie;
2450
2451 orig_cookie = zc->zc_cookie;
2452 top:
2453 (void) strlcpy(zc->zc_name, zhp->zfs_name, sizeof (zc->zc_name));
2454 rc = ioctl(zhp->zfs_hdl->libzfs_fd, arg, zc);
2455
2456 if (rc == -1) {
2457 switch (errno) {
2458 case ENOMEM:
2459 /* expand nvlist memory and try again */
2460 if (zcmd_expand_dst_nvlist(zhp->zfs_hdl, zc) != 0) {
2461 zcmd_free_nvlists(zc);
2462 return (-1);
2463 }
2464 zc->zc_cookie = orig_cookie;
2465 goto top;
2466 /*
2467 * An errno value of ESRCH indicates normal completion.
2468 * If ENOENT is returned, then the underlying dataset
2469 * has been removed since we obtained the handle.
2470 */
2471 case ESRCH:
2472 case ENOENT:
2473 rc = 1;
2474 break;
2475 default:
2476 rc = zfs_standard_error(zhp->zfs_hdl, errno,
2477 dgettext(TEXT_DOMAIN,
2478 "cannot iterate filesystems"));
2479 break;
2480 }
2481 }
2482 return (rc);
2483 }
2484
2485 /*
2486 * Iterate over all child filesystems
2487 */
2488 int
2489 zfs_iter_filesystems(zfs_handle_t *zhp, zfs_iter_f func, void *data)
2490 {
2491 zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
2492 zfs_handle_t *nzhp;
2493 int ret;
2494
2495 if (zhp->zfs_type != ZFS_TYPE_FILESYSTEM)
2496 return (0);
2497
2498 if (zcmd_alloc_dst_nvlist(zhp->zfs_hdl, &zc, 0) != 0)
2499 return (-1);
2500
2501 while ((ret = zfs_do_list_ioctl(zhp, ZFS_IOC_DATASET_LIST_NEXT,
2502 &zc)) == 0) {
2503 /*
2504 * Silently ignore errors, as the only plausible explanation is
2505 * that the pool has since been removed.
2506 */
2507 if ((nzhp = make_dataset_handle_zc(zhp->zfs_hdl,
2508 &zc)) == NULL) {
2509 continue;
2510 }
2511
2512 if ((ret = func(nzhp, data)) != 0) {
2513 zcmd_free_nvlists(&zc);
2514 return (ret);
2515 }
2516 }
2517 zcmd_free_nvlists(&zc);
2518 return ((ret < 0) ? ret : 0);
2519 }
2520
2521 /*
2522 * Iterate over all snapshots
2523 */
2524 int
2525 zfs_iter_snapshots(zfs_handle_t *zhp, zfs_iter_f func, void *data)
2526 {
2527 zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
2528 zfs_handle_t *nzhp;
2529 int ret;
2530
2531 if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT)
2532 return (0);
2533
2534 if (zcmd_alloc_dst_nvlist(zhp->zfs_hdl, &zc, 0) != 0)
2535 return (-1);
2536 while ((ret = zfs_do_list_ioctl(zhp, ZFS_IOC_SNAPSHOT_LIST_NEXT,
2537 &zc)) == 0) {
2538
2539 if ((nzhp = make_dataset_handle_zc(zhp->zfs_hdl,
2540 &zc)) == NULL) {
2541 continue;
2542 }
2543
2544 if ((ret = func(nzhp, data)) != 0) {
2545 zcmd_free_nvlists(&zc);
2546 return (ret);
2547 }
2548 }
2549 zcmd_free_nvlists(&zc);
2550 return ((ret < 0) ? ret : 0);
2551 }
2552
2553 /*
2554 * Iterate over all children, snapshots and filesystems
2555 */
2556 int
2557 zfs_iter_children(zfs_handle_t *zhp, zfs_iter_f func, void *data)
2558 {
2559 int ret;
2560
2561 if ((ret = zfs_iter_filesystems(zhp, func, data)) != 0)
2562 return (ret);
2563
2564 return (zfs_iter_snapshots(zhp, func, data));
2565 }
2566
2567 /*
2568 * Is one dataset name a child dataset of another?
2569 *
2570 * Needs to handle these cases:
2571 * Dataset 1 "a/foo" "a/foo" "a/foo" "a/foo"
2572 * Dataset 2 "a/fo" "a/foobar" "a/bar/baz" "a/foo/bar"
2573 * Descendant? No. No. No. Yes.
2574 */
2575 static boolean_t
2576 is_descendant(const char *ds1, const char *ds2)
2577 {
2578 size_t d1len = strlen(ds1);
2579
2580 /* ds2 can't be a descendant if it's smaller */
2581 if (strlen(ds2) < d1len)
2582 return (B_FALSE);
2583
2584 /* otherwise, compare strings and verify that there's a '/' char */
2585 return (ds2[d1len] == '/' && (strncmp(ds1, ds2, d1len) == 0));
2586 }
2587
2588 /*
2589 * Given a complete name, return just the portion that refers to the parent.
2590 * Can return NULL if this is a pool.
2591 */
2592 static int
2593 parent_name(const char *path, char *buf, size_t buflen)
2594 {
2595 char *loc;
2596
2597 if ((loc = strrchr(path, '/')) == NULL)
2598 return (-1);
2599
2600 (void) strncpy(buf, path, MIN(buflen, loc - path));
2601 buf[loc - path] = '\0';
2602
2603 return (0);
2604 }
2605
2606 /*
2607 * If accept_ancestor is false, then check to make sure that the given path has
2608 * a parent, and that it exists. If accept_ancestor is true, then find the
2609 * closest existing ancestor for the given path. In prefixlen return the
2610 * length of already existing prefix of the given path. We also fetch the
2611 * 'zoned' property, which is used to validate property settings when creating
2612 * new datasets.
2613 */
2614 static int
2615 check_parents(libzfs_handle_t *hdl, const char *path, uint64_t *zoned,
2616 boolean_t accept_ancestor, int *prefixlen)
2617 {
2618 zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
2619 char parent[ZFS_MAXNAMELEN];
2620 char *slash;
2621 zfs_handle_t *zhp;
2622 char errbuf[1024];
2623 uint64_t is_zoned;
2624
2625 (void) snprintf(errbuf, sizeof (errbuf),
2626 dgettext(TEXT_DOMAIN, "cannot create '%s'"), path);
2627
2628 /* get parent, and check to see if this is just a pool */
2629 if (parent_name(path, parent, sizeof (parent)) != 0) {
2630 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2631 "missing dataset name"));
2632 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
2633 }
2634
2635 /* check to see if the pool exists */
2636 if ((slash = strchr(parent, '/')) == NULL)
2637 slash = parent + strlen(parent);
2638 (void) strncpy(zc.zc_name, parent, slash - parent);
2639 zc.zc_name[slash - parent] = '\0';
2640 if (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_STATS, &zc) != 0 &&
2641 errno == ENOENT) {
2642 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2643 "no such pool '%s'"), zc.zc_name);
2644 return (zfs_error(hdl, EZFS_NOENT, errbuf));
2645 }
2646
2647 /* check to see if the parent dataset exists */
2648 while ((zhp = make_dataset_handle(hdl, parent)) == NULL) {
2649 if (errno == ENOENT && accept_ancestor) {
2650 /*
2651 * Go deeper to find an ancestor, give up on top level.
2652 */
2653 if (parent_name(parent, parent, sizeof (parent)) != 0) {
2654 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2655 "no such pool '%s'"), zc.zc_name);
2656 return (zfs_error(hdl, EZFS_NOENT, errbuf));
2657 }
2658 } else if (errno == ENOENT) {
2659 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2660 "parent does not exist"));
2661 return (zfs_error(hdl, EZFS_NOENT, errbuf));
2662 } else
2663 return (zfs_standard_error(hdl, errno, errbuf));
2664 }
2665
2666 is_zoned = zfs_prop_get_int(zhp, ZFS_PROP_ZONED);
2667 if (zoned != NULL)
2668 *zoned = is_zoned;
2669
2670 /* we are in a non-global zone, but parent is in the global zone */
2671 if (getzoneid() != GLOBAL_ZONEID && !is_zoned) {
2672 (void) zfs_standard_error(hdl, EPERM, errbuf);
2673 zfs_close(zhp);
2674 return (-1);
2675 }
2676
2677 /* make sure parent is a filesystem */
2678 if (zfs_get_type(zhp) != ZFS_TYPE_FILESYSTEM) {
2679 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2680 "parent is not a filesystem"));
2681 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
2682 zfs_close(zhp);
2683 return (-1);
2684 }
2685
2686 zfs_close(zhp);
2687 if (prefixlen != NULL)
2688 *prefixlen = strlen(parent);
2689 return (0);
2690 }
2691
2692 /*
2693 * Finds whether the dataset of the given type(s) exists.
2694 */
2695 boolean_t
2696 zfs_dataset_exists(libzfs_handle_t *hdl, const char *path, zfs_type_t types)
2697 {
2698 zfs_handle_t *zhp;
2699
2700 if (!zfs_validate_name(hdl, path, types, B_FALSE))
2701 return (B_FALSE);
2702
2703 /*
2704 * Try to get stats for the dataset, which will tell us if it exists.
2705 */
2706 if ((zhp = make_dataset_handle(hdl, path)) != NULL) {
2707 int ds_type = zhp->zfs_type;
2708
2709 zfs_close(zhp);
2710 if (types & ds_type)
2711 return (B_TRUE);
2712 }
2713 return (B_FALSE);
2714 }
2715
2716 /*
2717 * Given a path to 'target', create all the ancestors between
2718 * the prefixlen portion of the path, and the target itself.
2719 * Fail if the initial prefixlen-ancestor does not already exist.
2720 */
2721 int
2722 create_parents(libzfs_handle_t *hdl, char *target, int prefixlen)
2723 {
2724 zfs_handle_t *h;
2725 char *cp;
2726 const char *opname;
2727
2728 /* make sure prefix exists */
2729 cp = target + prefixlen;
2730 if (*cp != '/') {
2731 assert(strchr(cp, '/') == NULL);
2732 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM);
2733 } else {
2734 *cp = '\0';
2735 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM);
2736 *cp = '/';
2737 }
2738 if (h == NULL)
2739 return (-1);
2740 zfs_close(h);
2741
2742 /*
2743 * Attempt to create, mount, and share any ancestor filesystems,
2744 * up to the prefixlen-long one.
2745 */
2746 for (cp = target + prefixlen + 1;
2747 (cp = strchr(cp, '/')); *cp = '/', cp++) {
2748 char *logstr;
2749
2750 *cp = '\0';
2751
2752 h = make_dataset_handle(hdl, target);
2753 if (h) {
2754 /* it already exists, nothing to do here */
2755 zfs_close(h);
2756 continue;
2757 }
2758
2759 logstr = hdl->libzfs_log_str;
2760 hdl->libzfs_log_str = NULL;
2761 if (zfs_create(hdl, target, ZFS_TYPE_FILESYSTEM,
2762 NULL) != 0) {
2763 hdl->libzfs_log_str = logstr;
2764 opname = dgettext(TEXT_DOMAIN, "create");
2765 goto ancestorerr;
2766 }
2767
2768 hdl->libzfs_log_str = logstr;
2769 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM);
2770 if (h == NULL) {
2771 opname = dgettext(TEXT_DOMAIN, "open");
2772 goto ancestorerr;
2773 }
2774
2775 if (zfs_mount(h, NULL, 0) != 0) {
2776 opname = dgettext(TEXT_DOMAIN, "mount");
2777 goto ancestorerr;
2778 }
2779
2780 if (zfs_share(h) != 0) {
2781 opname = dgettext(TEXT_DOMAIN, "share");
2782 goto ancestorerr;
2783 }
2784
2785 zfs_close(h);
2786 }
2787
2788 return (0);
2789
2790 ancestorerr:
2791 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2792 "failed to %s ancestor '%s'"), opname, target);
2793 return (-1);
2794 }
2795
2796 /*
2797 * Creates non-existing ancestors of the given path.
2798 */
2799 int
2800 zfs_create_ancestors(libzfs_handle_t *hdl, const char *path)
2801 {
2802 int prefix;
2803 char *path_copy;
2804 int rc = 0;
2805
2806 if (check_parents(hdl, path, NULL, B_TRUE, &prefix) != 0)
2807 return (-1);
2808
2809 if ((path_copy = strdup(path)) != NULL) {
2810 rc = create_parents(hdl, path_copy, prefix);
2811 free(path_copy);
2812 }
2813 if (path_copy == NULL || rc != 0)
2814 return (-1);
2815
2816 return (0);
2817 }
2818
2819 /*
2820 * Create a new filesystem or volume.
2821 */
2822 int
2823 zfs_create(libzfs_handle_t *hdl, const char *path, zfs_type_t type,
2824 nvlist_t *props)
2825 {
2826 zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
2827 int ret;
2828 uint64_t size = 0;
2829 uint64_t blocksize = zfs_prop_default_numeric(ZFS_PROP_VOLBLOCKSIZE);
2830 char errbuf[1024];
2831 uint64_t zoned;
2832
2833 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
2834 "cannot create '%s'"), path);
2835
2836 /* validate the path, taking care to note the extended error message */
2837 if (!zfs_validate_name(hdl, path, type, B_TRUE))
2838 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
2839
2840 /* validate parents exist */
2841 if (check_parents(hdl, path, &zoned, B_FALSE, NULL) != 0)
2842 return (-1);
2843
2844 /*
2845 * The failure modes when creating a dataset of a different type over
2846 * one that already exists is a little strange. In particular, if you
2847 * try to create a dataset on top of an existing dataset, the ioctl()
2848 * will return ENOENT, not EEXIST. To prevent this from happening, we
2849 * first try to see if the dataset exists.
2850 */
2851 (void) strlcpy(zc.zc_name, path, sizeof (zc.zc_name));
2852 if (zfs_dataset_exists(hdl, zc.zc_name, ZFS_TYPE_DATASET)) {
2853 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2854 "dataset already exists"));
2855 return (zfs_error(hdl, EZFS_EXISTS, errbuf));
2856 }
2857
2858 if (type == ZFS_TYPE_VOLUME)
2859 zc.zc_objset_type = DMU_OST_ZVOL;
2860 else
2861 zc.zc_objset_type = DMU_OST_ZFS;
2862
2863 if (props && (props = zfs_valid_proplist(hdl, type, props,
2864 zoned, NULL, errbuf)) == 0)
2865 return (-1);
2866
2867 if (type == ZFS_TYPE_VOLUME) {
2868 /*
2869 * If we are creating a volume, the size and block size must
2870 * satisfy a few restraints. First, the blocksize must be a
2871 * valid block size between SPA_{MIN,MAX}BLOCKSIZE. Second, the
2872 * volsize must be a multiple of the block size, and cannot be
2873 * zero.
2874 */
2875 if (props == NULL || nvlist_lookup_uint64(props,
2876 zfs_prop_to_name(ZFS_PROP_VOLSIZE), &size) != 0) {
2877 nvlist_free(props);
2878 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2879 "missing volume size"));
2880 return (zfs_error(hdl, EZFS_BADPROP, errbuf));
2881 }
2882
2883 if ((ret = nvlist_lookup_uint64(props,
2884 zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
2885 &blocksize)) != 0) {
2886 if (ret == ENOENT) {
2887 blocksize = zfs_prop_default_numeric(
2888 ZFS_PROP_VOLBLOCKSIZE);
2889 } else {
2890 nvlist_free(props);
2891 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2892 "missing volume block size"));
2893 return (zfs_error(hdl, EZFS_BADPROP, errbuf));
2894 }
2895 }
2896
2897 if (size == 0) {
2898 nvlist_free(props);
2899 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2900 "volume size cannot be zero"));
2901 return (zfs_error(hdl, EZFS_BADPROP, errbuf));
2902 }
2903
2904 if (size % blocksize != 0) {
2905 nvlist_free(props);
2906 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2907 "volume size must be a multiple of volume block "
2908 "size"));
2909 return (zfs_error(hdl, EZFS_BADPROP, errbuf));
2910 }
2911 }
2912
2913 if (props && zcmd_write_src_nvlist(hdl, &zc, props) != 0)
2914 return (-1);
2915 nvlist_free(props);
2916
2917 /* create the dataset */
2918 ret = zfs_ioctl(hdl, ZFS_IOC_CREATE, &zc);
2919
2920 if (ret == 0 && type == ZFS_TYPE_VOLUME) {
2921 ret = zvol_create_link(hdl, path);
2922 if (ret) {
2923 (void) zfs_standard_error(hdl, errno,
2924 dgettext(TEXT_DOMAIN,
2925 "Volume successfully created, but device links "
2926 "were not created"));
2927 zcmd_free_nvlists(&zc);
2928 return (-1);
2929 }
2930 }
2931
2932 zcmd_free_nvlists(&zc);
2933
2934 /* check for failure */
2935 if (ret != 0) {
2936 char parent[ZFS_MAXNAMELEN];
2937 (void) parent_name(path, parent, sizeof (parent));
2938
2939 switch (errno) {
2940 case ENOENT:
2941 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2942 "no such parent '%s'"), parent);
2943 return (zfs_error(hdl, EZFS_NOENT, errbuf));
2944
2945 case EINVAL:
2946 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2947 "parent '%s' is not a filesystem"), parent);
2948 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
2949
2950 case EDOM:
2951 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2952 "volume block size must be power of 2 from "
2953 "%u to %uk"),
2954 (uint_t)SPA_MINBLOCKSIZE,
2955 (uint_t)SPA_MAXBLOCKSIZE >> 10);
2956
2957 return (zfs_error(hdl, EZFS_BADPROP, errbuf));
2958
2959 case ENOTSUP:
2960 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2961 "pool must be upgraded to set this "
2962 "property or value"));
2963 return (zfs_error(hdl, EZFS_BADVERSION, errbuf));
2964 #ifdef _ILP32
2965 case EOVERFLOW:
2966 /*
2967 * This platform can't address a volume this big.
2968 */
2969 if (type == ZFS_TYPE_VOLUME)
2970 return (zfs_error(hdl, EZFS_VOLTOOBIG,
2971 errbuf));
2972 #endif
2973 /* FALLTHROUGH */
2974 default:
2975 return (zfs_standard_error(hdl, errno, errbuf));
2976 }
2977 }
2978
2979 return (0);
2980 }
2981
2982 /*
2983 * Destroys the given dataset. The caller must make sure that the filesystem
2984 * isn't mounted, and that there are no active dependents.
2985 */
2986 int
2987 zfs_destroy(zfs_handle_t *zhp, boolean_t defer)
2988 {
2989 zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
2990
2991 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
2992
2993 if (ZFS_IS_VOLUME(zhp)) {
2994 if (zvol_remove_link(zhp->zfs_hdl, zhp->zfs_name) != 0)
2995 return (-1);
2996
2997 zc.zc_objset_type = DMU_OST_ZVOL;
2998 } else {
2999 zc.zc_objset_type = DMU_OST_ZFS;
3000 }
3001
3002 zc.zc_defer_destroy = defer;
3003 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_DESTROY, &zc) != 0) {
3004 return (zfs_standard_error_fmt(zhp->zfs_hdl, errno,
3005 dgettext(TEXT_DOMAIN, "cannot destroy '%s'"),
3006 zhp->zfs_name));
3007 }
3008
3009 remove_mountpoint(zhp);
3010
3011 return (0);
3012 }
3013
3014 struct destroydata {
3015 char *snapname;
3016 boolean_t gotone;
3017 boolean_t closezhp;
3018 };
3019
3020 static int
3021 zfs_check_snap_cb(zfs_handle_t *zhp, void *arg)
3022 {
3023 struct destroydata *dd = arg;
3024 zfs_handle_t *szhp;
3025 char name[ZFS_MAXNAMELEN];
3026 boolean_t closezhp = dd->closezhp;
3027 int rv = 0;
3028
3029 (void) strlcpy(name, zhp->zfs_name, sizeof (name));
3030 (void) strlcat(name, "@", sizeof (name));
3031 (void) strlcat(name, dd->snapname, sizeof (name));
3032
3033 szhp = make_dataset_handle(zhp->zfs_hdl, name);
3034 if (szhp) {
3035 dd->gotone = B_TRUE;
3036 zfs_close(szhp);
3037 }
3038
3039 if (zhp->zfs_type == ZFS_TYPE_VOLUME) {
3040 (void) zvol_remove_link(zhp->zfs_hdl, name);
3041 /*
3042 * NB: this is simply a best-effort. We don't want to
3043 * return an error, because then we wouldn't visit all
3044 * the volumes.
3045 */
3046 }
3047
3048 dd->closezhp = B_TRUE;
3049 rv = zfs_iter_filesystems(zhp, zfs_check_snap_cb, arg);
3050 if (closezhp)
3051 zfs_close(zhp);
3052 return (rv);
3053 }
3054
3055 /*
3056 * Destroys all snapshots with the given name in zhp & descendants.
3057 */
3058 int
3059 zfs_destroy_snaps(zfs_handle_t *zhp, char *snapname, boolean_t defer)
3060 {
3061 zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
3062 int ret;
3063 struct destroydata dd = { 0 };
3064
3065 dd.snapname = snapname;
3066 (void) zfs_check_snap_cb(zhp, &dd);
3067
3068 if (!dd.gotone) {
3069 return (zfs_standard_error_fmt(zhp->zfs_hdl, ENOENT,
3070 dgettext(TEXT_DOMAIN, "cannot destroy '%s@%s'"),
3071 zhp->zfs_name, snapname));
3072 }
3073
3074 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
3075 (void) strlcpy(zc.zc_value, snapname, sizeof (zc.zc_value));
3076 zc.zc_defer_destroy = defer;
3077
3078 ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_DESTROY_SNAPS, &zc);
3079 if (ret != 0) {
3080 char errbuf[1024];
3081
3082 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3083 "cannot destroy '%s@%s'"), zc.zc_name, snapname);
3084
3085 switch (errno) {
3086 case EEXIST:
3087 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
3088 "snapshot is cloned"));
3089 return (zfs_error(zhp->zfs_hdl, EZFS_EXISTS, errbuf));
3090
3091 default:
3092 return (zfs_standard_error(zhp->zfs_hdl, errno,
3093 errbuf));
3094 }
3095 }
3096
3097 return (0);
3098 }
3099
3100 /*
3101 * Clones the given dataset. The target must be of the same type as the source.
3102 */
3103 int
3104 zfs_clone(zfs_handle_t *zhp, const char *target, nvlist_t *props)
3105 {
3106 zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
3107 char parent[ZFS_MAXNAMELEN];
3108 int ret;
3109 char errbuf[1024];
3110 libzfs_handle_t *hdl = zhp->zfs_hdl;
3111 zfs_type_t type;
3112 uint64_t zoned;
3113
3114 assert(zhp->zfs_type == ZFS_TYPE_SNAPSHOT);
3115
3116 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3117 "cannot create '%s'"), target);
3118
3119 /* validate the target name */
3120 if (!zfs_validate_name(hdl, target, ZFS_TYPE_FILESYSTEM, B_TRUE))
3121 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3122
3123 /* validate parents exist */
3124 if (check_parents(hdl, target, &zoned, B_FALSE, NULL) != 0)
3125 return (-1);
3126
3127 (void) parent_name(target, parent, sizeof (parent));
3128
3129 /* do the clone */
3130 if (ZFS_IS_VOLUME(zhp)) {
3131 zc.zc_objset_type = DMU_OST_ZVOL;
3132 type = ZFS_TYPE_VOLUME;
3133 } else {
3134 zc.zc_objset_type = DMU_OST_ZFS;
3135 type = ZFS_TYPE_FILESYSTEM;
3136 }
3137
3138 if (props) {
3139 if ((props = zfs_valid_proplist(hdl, type, props, zoned,
3140 zhp, errbuf)) == NULL)
3141 return (-1);
3142
3143 if (zcmd_write_src_nvlist(hdl, &zc, props) != 0) {
3144 nvlist_free(props);
3145 return (-1);
3146 }
3147
3148 nvlist_free(props);
3149 }
3150
3151 (void) strlcpy(zc.zc_name, target, sizeof (zc.zc_name));
3152 (void) strlcpy(zc.zc_value, zhp->zfs_name, sizeof (zc.zc_value));
3153 ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_CREATE, &zc);
3154
3155 zcmd_free_nvlists(&zc);
3156
3157 if (ret != 0) {
3158 switch (errno) {
3159
3160 case ENOENT:
3161 /*
3162 * The parent doesn't exist. We should have caught this
3163 * above, but there may a race condition that has since
3164 * destroyed the parent.
3165 *
3166 * At this point, we don't know whether it's the source
3167 * that doesn't exist anymore, or whether the target
3168 * dataset doesn't exist.
3169 */
3170 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
3171 "no such parent '%s'"), parent);
3172 return (zfs_error(zhp->zfs_hdl, EZFS_NOENT, errbuf));
3173
3174 case EXDEV:
3175 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
3176 "source and target pools differ"));
3177 return (zfs_error(zhp->zfs_hdl, EZFS_CROSSTARGET,
3178 errbuf));
3179
3180 default:
3181 return (zfs_standard_error(zhp->zfs_hdl, errno,
3182 errbuf));
3183 }
3184 } else if (ZFS_IS_VOLUME(zhp)) {
3185 ret = zvol_create_link(zhp->zfs_hdl, target);
3186 }
3187
3188 return (ret);
3189 }
3190
3191 typedef struct promote_data {
3192 char cb_mountpoint[MAXPATHLEN];
3193 const char *cb_target;
3194 const char *cb_errbuf;
3195 uint64_t cb_pivot_txg;
3196 } promote_data_t;
3197
3198 static int
3199 promote_snap_cb(zfs_handle_t *zhp, void *data)
3200 {
3201 promote_data_t *pd = data;
3202 zfs_handle_t *szhp;
3203 char snapname[MAXPATHLEN];
3204 int rv = 0;
3205
3206 /* We don't care about snapshots after the pivot point */
3207 if (zfs_prop_get_int(zhp, ZFS_PROP_CREATETXG) > pd->cb_pivot_txg) {
3208 zfs_close(zhp);
3209 return (0);
3210 }
3211
3212 /* Remove the device link if it's a zvol. */
3213 if (ZFS_IS_VOLUME(zhp))
3214 (void) zvol_remove_link(zhp->zfs_hdl, zhp->zfs_name);
3215
3216 /* Check for conflicting names */
3217 (void) strlcpy(snapname, pd->cb_target, sizeof (snapname));
3218 (void) strlcat(snapname, strchr(zhp->zfs_name, '@'), sizeof (snapname));
3219 szhp = make_dataset_handle(zhp->zfs_hdl, snapname);
3220 if (szhp != NULL) {
3221 zfs_close(szhp);
3222 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
3223 "snapshot name '%s' from origin \n"
3224 "conflicts with '%s' from target"),
3225 zhp->zfs_name, snapname);
3226 rv = zfs_error(zhp->zfs_hdl, EZFS_EXISTS, pd->cb_errbuf);
3227 }
3228 zfs_close(zhp);
3229 return (rv);
3230 }
3231
3232 static int
3233 promote_snap_done_cb(zfs_handle_t *zhp, void *data)
3234 {
3235 promote_data_t *pd = data;
3236
3237 /* We don't care about snapshots after the pivot point */
3238 if (zfs_prop_get_int(zhp, ZFS_PROP_CREATETXG) <= pd->cb_pivot_txg) {
3239 /* Create the device link if it's a zvol. */
3240 if (ZFS_IS_VOLUME(zhp))
3241 (void) zvol_create_link(zhp->zfs_hdl, zhp->zfs_name);
3242 }
3243
3244 zfs_close(zhp);
3245 return (0);
3246 }
3247
3248 /*
3249 * Promotes the given clone fs to be the clone parent.
3250 */
3251 int
3252 zfs_promote(zfs_handle_t *zhp)
3253 {
3254 libzfs_handle_t *hdl = zhp->zfs_hdl;
3255 zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
3256 char parent[MAXPATHLEN];
3257 char *cp;
3258 int ret;
3259 zfs_handle_t *pzhp;
3260 promote_data_t pd;
3261 char errbuf[1024];
3262
3263 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3264 "cannot promote '%s'"), zhp->zfs_name);
3265
3266 if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) {
3267 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3268 "snapshots can not be promoted"));
3269 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
3270 }
3271
3272 (void) strlcpy(parent, zhp->zfs_dmustats.dds_origin, sizeof (parent));
3273 if (parent[0] == '\0') {
3274 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3275 "not a cloned filesystem"));
3276 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
3277 }
3278 cp = strchr(parent, '@');
3279 *cp = '\0';
3280
3281 /* Walk the snapshots we will be moving */
3282 pzhp = zfs_open(hdl, zhp->zfs_dmustats.dds_origin, ZFS_TYPE_SNAPSHOT);
3283 if (pzhp == NULL)
3284 return (-1);
3285 pd.cb_pivot_txg = zfs_prop_get_int(pzhp, ZFS_PROP_CREATETXG);
3286 zfs_close(pzhp);
3287 pd.cb_target = zhp->zfs_name;
3288 pd.cb_errbuf = errbuf;
3289 pzhp = zfs_open(hdl, parent, ZFS_TYPE_DATASET);
3290 if (pzhp == NULL)
3291 return (-1);
3292 (void) zfs_prop_get(pzhp, ZFS_PROP_MOUNTPOINT, pd.cb_mountpoint,
3293 sizeof (pd.cb_mountpoint), NULL, NULL, 0, FALSE);
3294 ret = zfs_iter_snapshots(pzhp, promote_snap_cb, &pd);
3295 if (ret != 0) {
3296 zfs_close(pzhp);
3297 return (-1);
3298 }
3299
3300 /* issue the ioctl */
3301 (void) strlcpy(zc.zc_value, zhp->zfs_dmustats.dds_origin,
3302 sizeof (zc.zc_value));
3303 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
3304 ret = zfs_ioctl(hdl, ZFS_IOC_PROMOTE, &zc);
3305
3306 if (ret != 0) {
3307 int save_errno = errno;
3308
3309 (void) zfs_iter_snapshots(pzhp, promote_snap_done_cb, &pd);
3310 zfs_close(pzhp);
3311
3312 switch (save_errno) {
3313 case EEXIST:
3314 /*
3315 * There is a conflicting snapshot name. We
3316 * should have caught this above, but they could
3317 * have renamed something in the mean time.
3318 */
3319 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3320 "conflicting snapshot '%s' from parent '%s'"),
3321 zc.zc_string, parent);
3322 return (zfs_error(hdl, EZFS_EXISTS, errbuf));
3323
3324 default:
3325 return (zfs_standard_error(hdl, save_errno, errbuf));
3326 }
3327 } else {
3328 (void) zfs_iter_snapshots(zhp, promote_snap_done_cb, &pd);
3329 }
3330
3331 zfs_close(pzhp);
3332 return (ret);
3333 }
3334
3335 struct createdata {
3336 const char *cd_snapname;
3337 int cd_ifexists;
3338 };
3339
3340 static int
3341 zfs_create_link_cb(zfs_handle_t *zhp, void *arg)
3342 {
3343 struct createdata *cd = arg;
3344 int ret;
3345
3346 if (zhp->zfs_type == ZFS_TYPE_VOLUME) {
3347 char name[MAXPATHLEN];
3348
3349 (void) strlcpy(name, zhp->zfs_name, sizeof (name));
3350 (void) strlcat(name, "@", sizeof (name));
3351 (void) strlcat(name, cd->cd_snapname, sizeof (name));
3352 (void) zvol_create_link_common(zhp->zfs_hdl, name,
3353 cd->cd_ifexists);
3354 /*
3355 * NB: this is simply a best-effort. We don't want to
3356 * return an error, because then we wouldn't visit all
3357 * the volumes.
3358 */
3359 }
3360
3361 ret = zfs_iter_filesystems(zhp, zfs_create_link_cb, cd);
3362
3363 zfs_close(zhp);
3364
3365 return (ret);
3366 }
3367
3368 /*
3369 * Takes a snapshot of the given dataset.
3370 */
3371 int
3372 zfs_snapshot(libzfs_handle_t *hdl, const char *path, boolean_t recursive,
3373 nvlist_t *props)
3374 {
3375 const char *delim;
3376 char parent[ZFS_MAXNAMELEN];
3377 zfs_handle_t *zhp;
3378 zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
3379 int ret;
3380 char errbuf[1024];
3381
3382 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3383 "cannot snapshot '%s'"), path);
3384
3385 /* validate the target name */
3386 if (!zfs_validate_name(hdl, path, ZFS_TYPE_SNAPSHOT, B_TRUE))
3387 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3388
3389 if (props) {
3390 if ((props = zfs_valid_proplist(hdl, ZFS_TYPE_SNAPSHOT,
3391 props, B_FALSE, NULL, errbuf)) == NULL)
3392 return (-1);
3393
3394 if (zcmd_write_src_nvlist(hdl, &zc, props) != 0) {
3395 nvlist_free(props);
3396 return (-1);
3397 }
3398
3399 nvlist_free(props);
3400 }
3401
3402 /* make sure the parent exists and is of the appropriate type */
3403 delim = strchr(path, '@');
3404 (void) strncpy(parent, path, delim - path);
3405 parent[delim - path] = '\0';
3406
3407 if ((zhp = zfs_open(hdl, parent, ZFS_TYPE_FILESYSTEM |
3408 ZFS_TYPE_VOLUME)) == NULL) {
3409 zcmd_free_nvlists(&zc);
3410 return (-1);
3411 }
3412
3413 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
3414 (void) strlcpy(zc.zc_value, delim+1, sizeof (zc.zc_value));
3415 if (ZFS_IS_VOLUME(zhp))
3416 zc.zc_objset_type = DMU_OST_ZVOL;
3417 else
3418 zc.zc_objset_type = DMU_OST_ZFS;
3419 zc.zc_cookie = recursive;
3420 ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_SNAPSHOT, &zc);
3421
3422 zcmd_free_nvlists(&zc);
3423
3424 /*
3425 * if it was recursive, the one that actually failed will be in
3426 * zc.zc_name.
3427 */
3428 if (ret != 0)
3429 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3430 "cannot create snapshot '%s@%s'"), zc.zc_name, zc.zc_value);
3431
3432 if (ret == 0 && recursive) {
3433 struct createdata cd;
3434
3435 cd.cd_snapname = delim + 1;
3436 cd.cd_ifexists = B_FALSE;
3437 (void) zfs_iter_filesystems(zhp, zfs_create_link_cb, &cd);
3438 }
3439 if (ret == 0 && zhp->zfs_type == ZFS_TYPE_VOLUME) {
3440 ret = zvol_create_link(zhp->zfs_hdl, path);
3441 if (ret != 0) {
3442 (void) zfs_standard_error(hdl, errno,
3443 dgettext(TEXT_DOMAIN,
3444 "Volume successfully snapshotted, but device links "
3445 "were not created"));
3446 zfs_close(zhp);
3447 return (-1);
3448 }
3449 }
3450
3451 if (ret != 0)
3452 (void) zfs_standard_error(hdl, errno, errbuf);
3453
3454 zfs_close(zhp);
3455
3456 return (ret);
3457 }
3458
3459 /*
3460 * Destroy any more recent snapshots. We invoke this callback on any dependents
3461 * of the snapshot first. If the 'cb_dependent' member is non-zero, then this
3462 * is a dependent and we should just destroy it without checking the transaction
3463 * group.
3464 */
3465 typedef struct rollback_data {
3466 const char *cb_target; /* the snapshot */
3467 uint64_t cb_create; /* creation time reference */
3468 boolean_t cb_error;
3469 boolean_t cb_dependent;
3470 boolean_t cb_force;
3471 } rollback_data_t;
3472
3473 static int
3474 rollback_destroy(zfs_handle_t *zhp, void *data)
3475 {
3476 rollback_data_t *cbp = data;
3477
3478 if (!cbp->cb_dependent) {
3479 if (strcmp(zhp->zfs_name, cbp->cb_target) != 0 &&
3480 zfs_get_type(zhp) == ZFS_TYPE_SNAPSHOT &&
3481 zfs_prop_get_int(zhp, ZFS_PROP_CREATETXG) >
3482 cbp->cb_create) {
3483 char *logstr;
3484
3485 cbp->cb_dependent = B_TRUE;
3486 cbp->cb_error |= zfs_iter_dependents(zhp, B_FALSE,
3487 rollback_destroy, cbp);
3488 cbp->cb_dependent = B_FALSE;
3489
3490 logstr = zhp->zfs_hdl->libzfs_log_str;
3491 zhp->zfs_hdl->libzfs_log_str = NULL;
3492 cbp->cb_error |= zfs_destroy(zhp, B_FALSE);
3493 zhp->zfs_hdl->libzfs_log_str = logstr;
3494 }
3495 } else {
3496 /* We must destroy this clone; first unmount it */
3497 prop_changelist_t *clp;
3498
3499 clp = changelist_gather(zhp, ZFS_PROP_NAME, 0,
3500 cbp->cb_force ? MS_FORCE: 0);
3501 if (clp == NULL || changelist_prefix(clp) != 0) {
3502 cbp->cb_error = B_TRUE;
3503 zfs_close(zhp);
3504 return (0);
3505 }
3506 if (zfs_destroy(zhp, B_FALSE) != 0)
3507 cbp->cb_error = B_TRUE;
3508 else
3509 changelist_remove(clp, zhp->zfs_name);
3510 (void) changelist_postfix(clp);
3511 changelist_free(clp);
3512 }
3513
3514 zfs_close(zhp);
3515 return (0);
3516 }
3517
3518 /*
3519 * Given a dataset, rollback to a specific snapshot, discarding any
3520 * data changes since then and making it the active dataset.
3521 *
3522 * Any snapshots more recent than the target are destroyed, along with
3523 * their dependents.
3524 */
3525 int
3526 zfs_rollback(zfs_handle_t *zhp, zfs_handle_t *snap, boolean_t force)
3527 {
3528 rollback_data_t cb = { 0 };
3529 int err;
3530 zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
3531 boolean_t restore_resv = 0;
3532 uint64_t old_volsize = 0, new_volsize;
3533 zfs_prop_t resv_prop = { 0 };
3534
3535 assert(zhp->zfs_type == ZFS_TYPE_FILESYSTEM ||
3536 zhp->zfs_type == ZFS_TYPE_VOLUME);
3537
3538 /*
3539 * Destroy all recent snapshots and its dependends.
3540 */
3541 cb.cb_force = force;
3542 cb.cb_target = snap->zfs_name;
3543 cb.cb_create = zfs_prop_get_int(snap, ZFS_PROP_CREATETXG);
3544 (void) zfs_iter_children(zhp, rollback_destroy, &cb);
3545
3546 if (cb.cb_error)
3547 return (-1);
3548
3549 /*
3550 * Now that we have verified that the snapshot is the latest,
3551 * rollback to the given snapshot.
3552 */
3553
3554 if (zhp->zfs_type == ZFS_TYPE_VOLUME) {
3555 if (zvol_remove_link(zhp->zfs_hdl, zhp->zfs_name) != 0)
3556 return (-1);
3557 if (zfs_which_resv_prop(zhp, &resv_prop) < 0)
3558 return (-1);
3559 old_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE);
3560 restore_resv =
3561 (old_volsize == zfs_prop_get_int(zhp, resv_prop));
3562 }
3563
3564 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
3565
3566 if (ZFS_IS_VOLUME(zhp))
3567 zc.zc_objset_type = DMU_OST_ZVOL;
3568 else
3569 zc.zc_objset_type = DMU_OST_ZFS;
3570
3571 /*
3572 * We rely on zfs_iter_children() to verify that there are no
3573 * newer snapshots for the given dataset. Therefore, we can
3574 * simply pass the name on to the ioctl() call. There is still
3575 * an unlikely race condition where the user has taken a
3576 * snapshot since we verified that this was the most recent.
3577 *
3578 */
3579 if ((err = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_ROLLBACK, &zc)) != 0) {
3580 (void) zfs_standard_error_fmt(zhp->zfs_hdl, errno,
3581 dgettext(TEXT_DOMAIN, "cannot rollback '%s'"),
3582 zhp->zfs_name);
3583 return (err);
3584 }
3585
3586 /*
3587 * For volumes, if the pre-rollback volsize matched the pre-
3588 * rollback reservation and the volsize has changed then set
3589 * the reservation property to the post-rollback volsize.
3590 * Make a new handle since the rollback closed the dataset.
3591 */
3592 if ((zhp->zfs_type == ZFS_TYPE_VOLUME) &&
3593 (zhp = make_dataset_handle(zhp->zfs_hdl, zhp->zfs_name))) {
3594 if ((err = zvol_create_link(zhp->zfs_hdl, zhp->zfs_name))) {
3595 zfs_close(zhp);
3596 return (err);
3597 }
3598 if (restore_resv) {
3599 new_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE);
3600 if (old_volsize != new_volsize)
3601 err = zfs_prop_set_int(zhp, resv_prop,
3602 new_volsize);
3603 }
3604 zfs_close(zhp);
3605 }
3606 return (err);
3607 }
3608
3609 /*
3610 * Iterate over all dependents for a given dataset. This includes both
3611 * hierarchical dependents (children) and data dependents (snapshots and
3612 * clones). The bulk of the processing occurs in get_dependents() in
3613 * libzfs_graph.c.
3614 */
3615 int
3616 zfs_iter_dependents(zfs_handle_t *zhp, boolean_t allowrecursion,
3617 zfs_iter_f func, void *data)
3618 {
3619 char **dependents;
3620 size_t count;
3621 int i;
3622 zfs_handle_t *child;
3623 int ret = 0;
3624
3625 if (get_dependents(zhp->zfs_hdl, allowrecursion, zhp->zfs_name,
3626 &dependents, &count) != 0)
3627 return (-1);
3628
3629 for (i = 0; i < count; i++) {
3630 if ((child = make_dataset_handle(zhp->zfs_hdl,
3631 dependents[i])) == NULL)
3632 continue;
3633
3634 if ((ret = func(child, data)) != 0)
3635 break;
3636 }
3637
3638 for (i = 0; i < count; i++)
3639 free(dependents[i]);
3640 free(dependents);
3641
3642 return (ret);
3643 }
3644
3645 /*
3646 * Renames the given dataset.
3647 */
3648 int
3649 zfs_rename(zfs_handle_t *zhp, const char *target, boolean_t recursive)
3650 {
3651 int ret;
3652 zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
3653 char *delim;
3654 prop_changelist_t *cl = NULL;
3655 zfs_handle_t *zhrp = NULL;
3656 char *parentname = NULL;
3657 char parent[ZFS_MAXNAMELEN];
3658 libzfs_handle_t *hdl = zhp->zfs_hdl;
3659 char errbuf[1024];
3660
3661 /* if we have the same exact name, just return success */
3662 if (strcmp(zhp->zfs_name, target) == 0)
3663 return (0);
3664
3665 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3666 "cannot rename to '%s'"), target);
3667
3668 /*
3669 * Make sure the target name is valid
3670 */
3671 if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) {
3672 if ((strchr(target, '@') == NULL) ||
3673 *target == '@') {
3674 /*
3675 * Snapshot target name is abbreviated,
3676 * reconstruct full dataset name
3677 */
3678 (void) strlcpy(parent, zhp->zfs_name,
3679 sizeof (parent));
3680 delim = strchr(parent, '@');
3681 if (strchr(target, '@') == NULL)
3682 *(++delim) = '\0';
3683 else
3684 *delim = '\0';
3685 (void) strlcat(parent, target, sizeof (parent));
3686 target = parent;
3687 } else {
3688 /*
3689 * Make sure we're renaming within the same dataset.
3690 */
3691 delim = strchr(target, '@');
3692 if (strncmp(zhp->zfs_name, target, delim - target)
3693 != 0 || zhp->zfs_name[delim - target] != '@') {
3694 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3695 "snapshots must be part of same "
3696 "dataset"));
3697 return (zfs_error(hdl, EZFS_CROSSTARGET,
3698 errbuf));
3699 }
3700 }
3701 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE))
3702 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3703 } else {
3704 if (recursive) {
3705 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3706 "recursive rename must be a snapshot"));
3707 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
3708 }
3709
3710 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE))
3711 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3712
3713 /* validate parents */
3714 if (check_parents(hdl, target, NULL, B_FALSE, NULL) != 0)
3715 return (-1);
3716
3717 /* make sure we're in the same pool */
3718 verify((delim = strchr(target, '/')) != NULL);
3719 if (strncmp(zhp->zfs_name, target, delim - target) != 0 ||
3720 zhp->zfs_name[delim - target] != '/') {
3721 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3722 "datasets must be within same pool"));
3723 return (zfs_error(hdl, EZFS_CROSSTARGET, errbuf));
3724 }
3725
3726 /* new name cannot be a child of the current dataset name */
3727 if (is_descendant(zhp->zfs_name, target)) {
3728 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3729 "New dataset name cannot be a descendant of "
3730 "current dataset name"));
3731 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3732 }
3733 }
3734
3735 (void) snprintf(errbuf, sizeof (errbuf),
3736 dgettext(TEXT_DOMAIN, "cannot rename '%s'"), zhp->zfs_name);
3737
3738 if (getzoneid() == GLOBAL_ZONEID &&
3739 zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) {
3740 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3741 "dataset is used in a non-global zone"));
3742 return (zfs_error(hdl, EZFS_ZONED, errbuf));
3743 }
3744
3745 if (recursive) {
3746 struct destroydata dd;
3747
3748 parentname = zfs_strdup(zhp->zfs_hdl, zhp->zfs_name);
3749 if (parentname == NULL) {
3750 ret = -1;
3751 goto error;
3752 }
3753 delim = strchr(parentname, '@');
3754 *delim = '\0';
3755 zhrp = zfs_open(zhp->zfs_hdl, parentname, ZFS_TYPE_DATASET);
3756 if (zhrp == NULL) {
3757 ret = -1;
3758 goto error;
3759 }
3760
3761 dd.snapname = delim + 1;
3762 dd.gotone = B_FALSE;
3763 dd.closezhp = B_TRUE;
3764
3765 /* We remove any zvol links prior to renaming them */
3766 ret = zfs_iter_filesystems(zhrp, zfs_check_snap_cb, &dd);
3767 if (ret) {
3768 goto error;
3769 }
3770 } else {
3771 if ((cl = changelist_gather(zhp, ZFS_PROP_NAME, 0, 0)) == NULL)
3772 return (-1);
3773
3774 if (changelist_haszonedchild(cl)) {
3775 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3776 "child dataset with inherited mountpoint is used "
3777 "in a non-global zone"));
3778 (void) zfs_error(hdl, EZFS_ZONED, errbuf);
3779 ret = -1;
3780 goto error;
3781 }
3782
3783 if ((ret = changelist_prefix(cl)) != 0)
3784 goto error;
3785 }
3786
3787 if (ZFS_IS_VOLUME(zhp))
3788 zc.zc_objset_type = DMU_OST_ZVOL;
3789 else
3790 zc.zc_objset_type = DMU_OST_ZFS;
3791
3792 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
3793 (void) strlcpy(zc.zc_value, target, sizeof (zc.zc_value));
3794
3795 zc.zc_cookie = recursive;
3796
3797 if ((ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_RENAME, &zc)) != 0) {
3798 /*
3799 * if it was recursive, the one that actually failed will
3800 * be in zc.zc_name
3801 */
3802 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3803 "cannot rename '%s'"), zc.zc_name);
3804
3805 if (recursive && errno == EEXIST) {
3806 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3807 "a child dataset already has a snapshot "
3808 "with the new name"));
3809 (void) zfs_error(hdl, EZFS_EXISTS, errbuf);
3810 } else {
3811 (void) zfs_standard_error(zhp->zfs_hdl, errno, errbuf);
3812 }
3813
3814 /*
3815 * On failure, we still want to remount any filesystems that
3816 * were previously mounted, so we don't alter the system state.
3817 */
3818 if (recursive) {
3819 struct createdata cd;
3820
3821 /* only create links for datasets that had existed */
3822 cd.cd_snapname = delim + 1;
3823 cd.cd_ifexists = B_TRUE;
3824 (void) zfs_iter_filesystems(zhrp, zfs_create_link_cb,
3825 &cd);
3826 } else {
3827 (void) changelist_postfix(cl);
3828 }
3829 } else {
3830 if (recursive) {
3831 struct createdata cd;
3832
3833 /* only create links for datasets that had existed */
3834 cd.cd_snapname = strchr(target, '@') + 1;
3835 cd.cd_ifexists = B_TRUE;
3836 ret = zfs_iter_filesystems(zhrp, zfs_create_link_cb,
3837 &cd);
3838 } else {
3839 changelist_rename(cl, zfs_get_name(zhp), target);
3840 ret = changelist_postfix(cl);
3841 }
3842 }
3843
3844 error:
3845 if (parentname) {
3846 free(parentname);
3847 }
3848 if (zhrp) {
3849 zfs_close(zhrp);
3850 }
3851 if (cl) {
3852 changelist_free(cl);
3853 }
3854 return (ret);
3855 }
3856
3857 /*
3858 * Given a zvol dataset, issue the ioctl to create the appropriate minor node,
3859 * and wait briefly for udev to create the /dev link.
3860 */
3861 int
3862 zvol_create_link(libzfs_handle_t *hdl, const char *dataset)
3863 {
3864 return (zvol_create_link_common(hdl, dataset, B_FALSE));
3865 }
3866
3867 static int
3868 zvol_create_link_common(libzfs_handle_t *hdl, const char *dataset, int ifexists)
3869 {
3870 zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
3871 char path[MAXPATHLEN];
3872 int error;
3873
3874 (void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name));
3875
3876 /*
3877 * Issue the appropriate ioctl.
3878 */
3879 if (ioctl(hdl->libzfs_fd, ZFS_IOC_CREATE_MINOR, &zc) != 0) {
3880 switch (errno) {
3881 case EEXIST:
3882 /*
3883 * Silently ignore the case where the link already
3884 * exists. This allows 'zfs volinit' to be run multiple
3885 * times without errors.
3886 */
3887 return (0);
3888
3889 case ENOENT:
3890 /*
3891 * Dataset does not exist in the kernel. If we
3892 * don't care (see zfs_rename), then ignore the
3893 * error quietly.
3894 */
3895 if (ifexists) {
3896 return (0);
3897 }
3898
3899 /* FALLTHROUGH */
3900
3901 default:
3902 return (zfs_standard_error_fmt(hdl, errno,
3903 dgettext(TEXT_DOMAIN, "cannot create device links "
3904 "for '%s'"), dataset));
3905 }
3906 }
3907
3908 /*
3909 * Wait up to 10 seconds for udev to create the device.
3910 */
3911 (void) snprintf(path, sizeof (path), "%s/%s", ZVOL_DIR, dataset);
3912 error = zpool_label_disk_wait(path, 10000);
3913 if (error)
3914 (void) printf(gettext("%s may not be immediately "
3915 "available\n"), path);
3916
3917 return (0);
3918 }
3919
3920 /*
3921 * Remove a minor node for the given zvol and the associated /dev links.
3922 */
3923 int
3924 zvol_remove_link(libzfs_handle_t *hdl, const char *dataset)
3925 {
3926 zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
3927
3928 (void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name));
3929
3930 if (ioctl(hdl->libzfs_fd, ZFS_IOC_REMOVE_MINOR, &zc) != 0) {
3931 switch (errno) {
3932 case ENXIO:
3933 /*
3934 * Silently ignore the case where the link no longer
3935 * exists, so that 'zfs volfini' can be run multiple
3936 * times without errors.
3937 */
3938 return (0);
3939
3940 default:
3941 return (zfs_standard_error_fmt(hdl, errno,
3942 dgettext(TEXT_DOMAIN, "cannot remove device "
3943 "links for '%s'"), dataset));
3944 }
3945 }
3946
3947 return (0);
3948 }
3949
3950 nvlist_t *
3951 zfs_get_user_props(zfs_handle_t *zhp)
3952 {
3953 return (zhp->zfs_user_props);
3954 }
3955
3956 /*
3957 * This function is used by 'zfs list' to determine the exact set of columns to
3958 * display, and their maximum widths. This does two main things:
3959 *
3960 * - If this is a list of all properties, then expand the list to include
3961 * all native properties, and set a flag so that for each dataset we look
3962 * for new unique user properties and add them to the list.
3963 *
3964 * - For non fixed-width properties, keep track of the maximum width seen
3965 * so that we can size the column appropriately. If the user has
3966 * requested received property values, we also need to compute the width
3967 * of the RECEIVED column.
3968 */
3969 int
3970 zfs_expand_proplist(zfs_handle_t *zhp, zprop_list_t **plp, boolean_t received)
3971 {
3972 libzfs_handle_t *hdl = zhp->zfs_hdl;
3973 zprop_list_t *entry;
3974 zprop_list_t **last, **start;
3975 nvlist_t *userprops, *propval;
3976 nvpair_t *elem;
3977 char *strval;
3978 char buf[ZFS_MAXPROPLEN];
3979
3980 if (zprop_expand_list(hdl, plp, ZFS_TYPE_DATASET) != 0)
3981 return (-1);
3982
3983 userprops = zfs_get_user_props(zhp);
3984
3985 entry = *plp;
3986 if (entry->pl_all && nvlist_next_nvpair(userprops, NULL) != NULL) {
3987 /*
3988 * Go through and add any user properties as necessary. We
3989 * start by incrementing our list pointer to the first
3990 * non-native property.
3991 */
3992 start = plp;
3993 while (*start != NULL) {
3994 if ((*start)->pl_prop == ZPROP_INVAL)
3995 break;
3996 start = &(*start)->pl_next;
3997 }
3998
3999 elem = NULL;
4000 while ((elem = nvlist_next_nvpair(userprops, elem)) != NULL) {
4001 /*
4002 * See if we've already found this property in our list.
4003 */
4004 for (last = start; *last != NULL;
4005 last = &(*last)->pl_next) {
4006 if (strcmp((*last)->pl_user_prop,
4007 nvpair_name(elem)) == 0)
4008 break;
4009 }
4010
4011 if (*last == NULL) {
4012 if ((entry = zfs_alloc(hdl,
4013 sizeof (zprop_list_t))) == NULL ||
4014 ((entry->pl_user_prop = zfs_strdup(hdl,
4015 nvpair_name(elem)))) == NULL) {
4016 free(entry);
4017 return (-1);
4018 }
4019
4020 entry->pl_prop = ZPROP_INVAL;
4021 entry->pl_width = strlen(nvpair_name(elem));
4022 entry->pl_all = B_TRUE;
4023 *last = entry;
4024 }
4025 }
4026 }
4027
4028 /*
4029 * Now go through and check the width of any non-fixed columns
4030 */
4031 for (entry = *plp; entry != NULL; entry = entry->pl_next) {
4032 if (entry->pl_fixed)
4033 continue;
4034
4035 if (entry->pl_prop != ZPROP_INVAL) {
4036 if (zfs_prop_get(zhp, entry->pl_prop,
4037 buf, sizeof (buf), NULL, NULL, 0, B_FALSE) == 0) {
4038 if (strlen(buf) > entry->pl_width)
4039 entry->pl_width = strlen(buf);
4040 }
4041 if (received && zfs_prop_get_recvd(zhp,
4042 zfs_prop_to_name(entry->pl_prop),
4043 buf, sizeof (buf), B_FALSE) == 0)
4044 if (strlen(buf) > entry->pl_recvd_width)
4045 entry->pl_recvd_width = strlen(buf);
4046 } else {
4047 if (nvlist_lookup_nvlist(userprops, entry->pl_user_prop,
4048 &propval) == 0) {
4049 verify(nvlist_lookup_string(propval,
4050 ZPROP_VALUE, &strval) == 0);
4051 if (strlen(strval) > entry->pl_width)
4052 entry->pl_width = strlen(strval);
4053 }
4054 if (received && zfs_prop_get_recvd(zhp,
4055 entry->pl_user_prop,
4056 buf, sizeof (buf), B_FALSE) == 0)
4057 if (strlen(buf) > entry->pl_recvd_width)
4058 entry->pl_recvd_width = strlen(buf);
4059 }
4060 }
4061
4062 return (0);
4063 }
4064
4065 void
4066 zfs_prune_proplist(zfs_handle_t *zhp, uint8_t *props)
4067 {
4068 nvpair_t *curr;
4069
4070 /*
4071 * Keep a reference to the props-table against which we prune the
4072 * properties.
4073 */
4074 zhp->zfs_props_table = props;
4075
4076 curr = nvlist_next_nvpair(zhp->zfs_props, NULL);
4077
4078 while (curr) {
4079 zfs_prop_t zfs_prop = zfs_name_to_prop(nvpair_name(curr));
4080 nvpair_t *next = nvlist_next_nvpair(zhp->zfs_props, curr);
4081
4082 /*
4083 * User properties will result in ZPROP_INVAL, and since we
4084 * only know how to prune standard ZFS properties, we always
4085 * leave these in the list. This can also happen if we
4086 * encounter an unknown DSL property (when running older
4087 * software, for example).
4088 */
4089 if (zfs_prop != ZPROP_INVAL && props[zfs_prop] == B_FALSE)
4090 (void) nvlist_remove(zhp->zfs_props,
4091 nvpair_name(curr), nvpair_type(curr));
4092 curr = next;
4093 }
4094 }
4095
4096 static int
4097 zfs_smb_acl_mgmt(libzfs_handle_t *hdl, char *dataset, char *path,
4098 zfs_smb_acl_op_t cmd, char *resource1, char *resource2)
4099 {
4100 zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
4101 nvlist_t *nvlist = NULL;
4102 int error;
4103
4104 (void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name));
4105 (void) strlcpy(zc.zc_value, path, sizeof (zc.zc_value));
4106 zc.zc_cookie = (uint64_t)cmd;
4107
4108 if (cmd == ZFS_SMB_ACL_RENAME) {
4109 if (nvlist_alloc(&nvlist, NV_UNIQUE_NAME, 0) != 0) {
4110 (void) no_memory(hdl);
4111 return (-1);
4112 }
4113 }
4114
4115 switch (cmd) {
4116 case ZFS_SMB_ACL_ADD:
4117 case ZFS_SMB_ACL_REMOVE:
4118 (void) strlcpy(zc.zc_string, resource1, sizeof (zc.zc_string));
4119 break;
4120 case ZFS_SMB_ACL_RENAME:
4121 if (nvlist_add_string(nvlist, ZFS_SMB_ACL_SRC,
4122 resource1) != 0) {
4123 (void) no_memory(hdl);
4124 return (-1);
4125 }
4126 if (nvlist_add_string(nvlist, ZFS_SMB_ACL_TARGET,
4127 resource2) != 0) {
4128 (void) no_memory(hdl);
4129 return (-1);
4130 }
4131 if (zcmd_write_src_nvlist(hdl, &zc, nvlist) != 0) {
4132 nvlist_free(nvlist);
4133 return (-1);
4134 }
4135 break;
4136 case ZFS_SMB_ACL_PURGE:
4137 break;
4138 default:
4139 return (-1);
4140 }
4141 error = ioctl(hdl->libzfs_fd, ZFS_IOC_SMB_ACL, &zc);
4142 if (nvlist)
4143 nvlist_free(nvlist);
4144 return (error);
4145 }
4146
4147 int
4148 zfs_smb_acl_add(libzfs_handle_t *hdl, char *dataset,
4149 char *path, char *resource)
4150 {
4151 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_ADD,
4152 resource, NULL));
4153 }
4154
4155 int
4156 zfs_smb_acl_remove(libzfs_handle_t *hdl, char *dataset,
4157 char *path, char *resource)
4158 {
4159 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_REMOVE,
4160 resource, NULL));
4161 }
4162
4163 int
4164 zfs_smb_acl_purge(libzfs_handle_t *hdl, char *dataset, char *path)
4165 {
4166 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_PURGE,
4167 NULL, NULL));
4168 }
4169
4170 int
4171 zfs_smb_acl_rename(libzfs_handle_t *hdl, char *dataset, char *path,
4172 char *oldname, char *newname)
4173 {
4174 return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_RENAME,
4175 oldname, newname));
4176 }
4177
4178 int
4179 zfs_userspace(zfs_handle_t *zhp, zfs_userquota_prop_t type,
4180 zfs_userspace_cb_t func, void *arg)
4181 {
4182 zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
4183 int error;
4184 zfs_useracct_t buf[100];
4185
4186 (void) strncpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
4187
4188 zc.zc_objset_type = type;
4189 zc.zc_nvlist_dst = (uintptr_t)buf;
4190
4191 /* CONSTCOND */
4192 while (1) {
4193 zfs_useracct_t *zua = buf;
4194
4195 zc.zc_nvlist_dst_size = sizeof (buf);
4196 error = ioctl(zhp->zfs_hdl->libzfs_fd,
4197 ZFS_IOC_USERSPACE_MANY, &zc);
4198 if (error || zc.zc_nvlist_dst_size == 0)
4199 break;
4200
4201 while (zc.zc_nvlist_dst_size > 0) {
4202 error = func(arg, zua->zu_domain, zua->zu_rid,
4203 zua->zu_space);
4204 if (error != 0)
4205 return (error);
4206 zua++;
4207 zc.zc_nvlist_dst_size -= sizeof (zfs_useracct_t);
4208 }
4209 }
4210
4211 return (error);
4212 }
4213
4214 int
4215 zfs_hold(zfs_handle_t *zhp, const char *snapname, const char *tag,
4216 boolean_t recursive, boolean_t temphold, boolean_t enoent_ok,
4217 int cleanup_fd, uint64_t dsobj, uint64_t createtxg)
4218 {
4219 zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
4220 libzfs_handle_t *hdl = zhp->zfs_hdl;
4221
4222 ASSERT(!recursive || dsobj == 0);
4223
4224 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
4225 (void) strlcpy(zc.zc_value, snapname, sizeof (zc.zc_value));
4226 if (strlcpy(zc.zc_string, tag, sizeof (zc.zc_string))
4227 >= sizeof (zc.zc_string))
4228 return (zfs_error(hdl, EZFS_TAGTOOLONG, tag));
4229 zc.zc_cookie = recursive;
4230 zc.zc_temphold = temphold;
4231 zc.zc_cleanup_fd = cleanup_fd;
4232 zc.zc_sendobj = dsobj;
4233 zc.zc_createtxg = createtxg;
4234
4235 if (zfs_ioctl(hdl, ZFS_IOC_HOLD, &zc) != 0) {
4236 char errbuf[ZFS_MAXNAMELEN+32];
4237
4238 /*
4239 * if it was recursive, the one that actually failed will be in
4240 * zc.zc_name.
4241 */
4242 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
4243 "cannot hold '%s@%s'"), zc.zc_name, snapname);
4244 switch (errno) {
4245 case E2BIG:
4246 /*
4247 * Temporary tags wind up having the ds object id
4248 * prepended. So even if we passed the length check
4249 * above, it's still possible for the tag to wind
4250 * up being slightly too long.
4251 */
4252 return (zfs_error(hdl, EZFS_TAGTOOLONG, errbuf));
4253 case ENOTSUP:
4254 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4255 "pool must be upgraded"));
4256 return (zfs_error(hdl, EZFS_BADVERSION, errbuf));
4257 case EINVAL:
4258 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
4259 case EEXIST:
4260 return (zfs_error(hdl, EZFS_REFTAG_HOLD, errbuf));
4261 case ENOENT:
4262 if (enoent_ok)
4263 return (ENOENT);
4264 /* FALLTHROUGH */
4265 default:
4266 return (zfs_standard_error_fmt(hdl, errno, errbuf));
4267 }
4268 }
4269
4270 return (0);
4271 }
4272
4273 int
4274 zfs_release(zfs_handle_t *zhp, const char *snapname, const char *tag,
4275 boolean_t recursive)
4276 {
4277 zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
4278 libzfs_handle_t *hdl = zhp->zfs_hdl;
4279
4280 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
4281 (void) strlcpy(zc.zc_value, snapname, sizeof (zc.zc_value));
4282 if (strlcpy(zc.zc_string, tag, sizeof (zc.zc_string))
4283 >= sizeof (zc.zc_string))
4284 return (zfs_error(hdl, EZFS_TAGTOOLONG, tag));
4285 zc.zc_cookie = recursive;
4286
4287 if (zfs_ioctl(hdl, ZFS_IOC_RELEASE, &zc) != 0) {
4288 char errbuf[ZFS_MAXNAMELEN+32];
4289
4290 /*
4291 * if it was recursive, the one that actually failed will be in
4292 * zc.zc_name.
4293 */
4294 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
4295 "cannot release '%s' from '%s@%s'"), tag, zc.zc_name,
4296 snapname);
4297 switch (errno) {
4298 case ESRCH:
4299 return (zfs_error(hdl, EZFS_REFTAG_RELE, errbuf));
4300 case ENOTSUP:
4301 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4302 "pool must be upgraded"));
4303 return (zfs_error(hdl, EZFS_BADVERSION, errbuf));
4304 case EINVAL:
4305 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
4306 default:
4307 return (zfs_standard_error_fmt(hdl, errno, errbuf));
4308 }
4309 }
4310
4311 return (0);
4312 }
4313
4314 uint64_t
4315 zvol_volsize_to_reservation(uint64_t volsize, nvlist_t *props)
4316 {
4317 uint64_t numdb;
4318 uint64_t nblocks, volblocksize;
4319 int ncopies;
4320 char *strval;
4321
4322 if (nvlist_lookup_string(props,
4323 zfs_prop_to_name(ZFS_PROP_COPIES), &strval) == 0)
4324 ncopies = atoi(strval);
4325 else
4326 ncopies = 1;
4327 if (nvlist_lookup_uint64(props,
4328 zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
4329 &volblocksize) != 0)
4330 volblocksize = ZVOL_DEFAULT_BLOCKSIZE;
4331 nblocks = volsize/volblocksize;
4332 /* start with metadnode L0-L6 */
4333 numdb = 7;
4334 /* calculate number of indirects */
4335 while (nblocks > 1) {
4336 nblocks += DNODES_PER_LEVEL - 1;
4337 nblocks /= DNODES_PER_LEVEL;
4338 numdb += nblocks;
4339 }
4340 numdb *= MIN(SPA_DVAS_PER_BP, ncopies + 1);
4341 volsize *= ncopies;
4342 /*
4343 * this is exactly DN_MAX_INDBLKSHIFT when metadata isn't
4344 * compressed, but in practice they compress down to about
4345 * 1100 bytes
4346 */
4347 numdb *= 1ULL << DN_MAX_INDBLKSHIFT;
4348 volsize += numdb;
4349 return (volsize);
4350 }
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