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 2010 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 *
26 * Portions Copyright 2007 Ramprakash Jelari
27 *
28 * Copyright (c) 2011 Pawel Jakub Dawidek <pawel@dawidek.net>.
29 * All rights reserved.
30 */
31
32 #include <libintl.h>
33 #include <libuutil.h>
34 #include <stddef.h>
35 #include <stdlib.h>
36 #include <string.h>
37 #include <unistd.h>
38 #include <zone.h>
39
40 #include <libzfs.h>
41
42 #include "libzfs_impl.h"
43
44 /*
45 * Structure to keep track of dataset state. Before changing the 'sharenfs' or
46 * 'mountpoint' property, we record whether the filesystem was previously
47 * mounted/shared. This prior state dictates whether we remount/reshare the
48 * dataset after the property has been changed.
49 *
50 * The interface consists of the following sequence of functions:
51 *
52 * changelist_gather()
53 * changelist_prefix()
54 * < change property >
55 * changelist_postfix()
56 * changelist_free()
57 *
58 * Other interfaces:
59 *
60 * changelist_remove() - remove a node from a gathered list
61 * changelist_rename() - renames all datasets appropriately when doing a rename
62 * changelist_unshare() - unshares all the nodes in a given changelist
63 * changelist_haszonedchild() - check if there is any child exported to
64 * a local zone
65 */
66 typedef struct prop_changenode {
67 zfs_handle_t *cn_handle;
68 int cn_shared;
69 int cn_mounted;
70 int cn_zoned;
71 boolean_t cn_needpost; /* is postfix() needed? */
72 uu_list_node_t cn_listnode;
73 } prop_changenode_t;
74
75 struct prop_changelist {
76 zfs_prop_t cl_prop;
77 zfs_prop_t cl_realprop;
78 zfs_prop_t cl_shareprop; /* used with sharenfs/sharesmb */
79 uu_list_pool_t *cl_pool;
80 uu_list_t *cl_list;
81 boolean_t cl_waslegacy;
82 boolean_t cl_allchildren;
83 boolean_t cl_alldependents;
84 int cl_mflags; /* Mount flags */
85 int cl_gflags; /* Gather request flags */
86 boolean_t cl_haszonedchild;
87 boolean_t cl_sorted;
88 };
89
90 /*
91 * If the property is 'mountpoint', go through and unmount filesystems as
92 * necessary. We don't do the same for 'sharenfs', because we can just re-share
93 * with different options without interrupting service. We do handle 'sharesmb'
94 * since there may be old resource names that need to be removed.
95 */
96 int
changelist_prefix(prop_changelist_t * clp)97 changelist_prefix(prop_changelist_t *clp)
98 {
99 prop_changenode_t *cn;
100 int ret = 0;
101
102 if (clp->cl_prop != ZFS_PROP_MOUNTPOINT &&
103 clp->cl_prop != ZFS_PROP_SHARESMB)
104 return (0);
105
106 for (cn = uu_list_first(clp->cl_list); cn != NULL;
107 cn = uu_list_next(clp->cl_list, cn)) {
108
109 /* if a previous loop failed, set the remaining to false */
110 if (ret == -1) {
111 cn->cn_needpost = B_FALSE;
112 continue;
113 }
114
115 /*
116 * If we are in the global zone, but this dataset is exported
117 * to a local zone, do nothing.
118 */
119 if (getzoneid() == GLOBAL_ZONEID && cn->cn_zoned)
120 continue;
121
122 if (!ZFS_IS_VOLUME(cn->cn_handle)) {
123 /*
124 * Do the property specific processing.
125 */
126 switch (clp->cl_prop) {
127 case ZFS_PROP_MOUNTPOINT:
128 if (clp->cl_gflags & CL_GATHER_DONT_UNMOUNT)
129 break;
130 if (zfs_unmount(cn->cn_handle, NULL,
131 clp->cl_mflags) != 0) {
132 ret = -1;
133 cn->cn_needpost = B_FALSE;
134 }
135 break;
136 case ZFS_PROP_SHARESMB:
137 (void) zfs_unshare_smb(cn->cn_handle, NULL);
138 break;
139 }
140 }
141 }
142
143 if (ret == -1)
144 (void) changelist_postfix(clp);
145
146 return (ret);
147 }
148
149 /*
150 * If the property is 'mountpoint' or 'sharenfs', go through and remount and/or
151 * reshare the filesystems as necessary. In changelist_gather() we recorded
152 * whether the filesystem was previously shared or mounted. The action we take
153 * depends on the previous state, and whether the value was previously 'legacy'.
154 * For non-legacy properties, we only remount/reshare the filesystem if it was
155 * previously mounted/shared. Otherwise, we always remount/reshare the
156 * filesystem.
157 */
158 int
changelist_postfix(prop_changelist_t * clp)159 changelist_postfix(prop_changelist_t *clp)
160 {
161 prop_changenode_t *cn;
162 char shareopts[ZFS_MAXPROPLEN];
163 int errors = 0;
164 libzfs_handle_t *hdl;
165
166 /*
167 * If we're changing the mountpoint, attempt to destroy the underlying
168 * mountpoint. All other datasets will have inherited from this dataset
169 * (in which case their mountpoints exist in the filesystem in the new
170 * location), or have explicit mountpoints set (in which case they won't
171 * be in the changelist).
172 */
173 if ((cn = uu_list_last(clp->cl_list)) == NULL)
174 return (0);
175
176 if (clp->cl_prop == ZFS_PROP_MOUNTPOINT &&
177 !(clp->cl_gflags & CL_GATHER_DONT_UNMOUNT)) {
178 remove_mountpoint(cn->cn_handle);
179 }
180
181 /*
182 * It is possible that the changelist_prefix() used libshare
183 * to unshare some entries. Since libshare caches data, an
184 * attempt to reshare during postfix can fail unless libshare
185 * is uninitialized here so that it will reinitialize later.
186 */
187 if (cn->cn_handle != NULL) {
188 hdl = cn->cn_handle->zfs_hdl;
189 assert(hdl != NULL);
190 zfs_uninit_libshare(hdl);
191 }
192
193 /*
194 * We walk the datasets in reverse, because we want to mount any parent
195 * datasets before mounting the children. We walk all datasets even if
196 * there are errors.
197 */
198 for (cn = uu_list_last(clp->cl_list); cn != NULL;
199 cn = uu_list_prev(clp->cl_list, cn)) {
200
201 boolean_t sharenfs;
202 boolean_t sharesmb;
203 boolean_t mounted;
204
205 /*
206 * If we are in the global zone, but this dataset is exported
207 * to a local zone, do nothing.
208 */
209 if (getzoneid() == GLOBAL_ZONEID && cn->cn_zoned)
210 continue;
211
212 /* Only do post-processing if it's required */
213 if (!cn->cn_needpost)
214 continue;
215 cn->cn_needpost = B_FALSE;
216
217 zfs_refresh_properties(cn->cn_handle);
218
219 if (ZFS_IS_VOLUME(cn->cn_handle))
220 continue;
221
222 /*
223 * Remount if previously mounted or mountpoint was legacy,
224 * or sharenfs or sharesmb property is set.
225 */
226 sharenfs = ((zfs_prop_get(cn->cn_handle, ZFS_PROP_SHARENFS,
227 shareopts, sizeof (shareopts), NULL, NULL, 0,
228 B_FALSE) == 0) && (strcmp(shareopts, "off") != 0));
229
230 sharesmb = ((zfs_prop_get(cn->cn_handle, ZFS_PROP_SHARESMB,
231 shareopts, sizeof (shareopts), NULL, NULL, 0,
232 B_FALSE) == 0) && (strcmp(shareopts, "off") != 0));
233
234 mounted = (clp->cl_gflags & CL_GATHER_DONT_UNMOUNT) ||
235 zfs_is_mounted(cn->cn_handle, NULL);
236
237 if (!mounted && (cn->cn_mounted ||
238 ((sharenfs || sharesmb || clp->cl_waslegacy) &&
239 (zfs_prop_get_int(cn->cn_handle,
240 ZFS_PROP_CANMOUNT) == ZFS_CANMOUNT_ON)))) {
241
242 if (zfs_mount(cn->cn_handle, NULL, 0) != 0)
243 errors++;
244 else
245 mounted = TRUE;
246 }
247
248 /*
249 * If the file system is mounted we always re-share even
250 * if the filesystem is currently shared, so that we can
251 * adopt any new options.
252 */
253 if (sharenfs && mounted)
254 errors += zfs_share_nfs(cn->cn_handle);
255 else if (cn->cn_shared || clp->cl_waslegacy)
256 errors += zfs_unshare_nfs(cn->cn_handle, NULL);
257 if (sharesmb && mounted)
258 errors += zfs_share_smb(cn->cn_handle);
259 else if (cn->cn_shared || clp->cl_waslegacy)
260 errors += zfs_unshare_smb(cn->cn_handle, NULL);
261 }
262
263 return (errors ? -1 : 0);
264 }
265
266 /*
267 * Is this "dataset" a child of "parent"?
268 */
269 boolean_t
isa_child_of(const char * dataset,const char * parent)270 isa_child_of(const char *dataset, const char *parent)
271 {
272 int len;
273
274 len = strlen(parent);
275
276 if (strncmp(dataset, parent, len) == 0 &&
277 (dataset[len] == '@' || dataset[len] == '/' ||
278 dataset[len] == '\0'))
279 return (B_TRUE);
280 else
281 return (B_FALSE);
282
283 }
284
285 /*
286 * If we rename a filesystem, child filesystem handles are no longer valid
287 * since we identify each dataset by its name in the ZFS namespace. As a
288 * result, we have to go through and fix up all the names appropriately. We
289 * could do this automatically if libzfs kept track of all open handles, but
290 * this is a lot less work.
291 */
292 void
changelist_rename(prop_changelist_t * clp,const char * src,const char * dst)293 changelist_rename(prop_changelist_t *clp, const char *src, const char *dst)
294 {
295 prop_changenode_t *cn;
296 char newname[ZFS_MAXNAMELEN];
297
298 for (cn = uu_list_first(clp->cl_list); cn != NULL;
299 cn = uu_list_next(clp->cl_list, cn)) {
300 /*
301 * Do not rename a clone that's not in the source hierarchy.
302 */
303 if (!isa_child_of(cn->cn_handle->zfs_name, src))
304 continue;
305
306 /*
307 * Destroy the previous mountpoint if needed.
308 */
309 remove_mountpoint(cn->cn_handle);
310
311 (void) strlcpy(newname, dst, sizeof (newname));
312 (void) strcat(newname, cn->cn_handle->zfs_name + strlen(src));
313
314 (void) strlcpy(cn->cn_handle->zfs_name, newname,
315 sizeof (cn->cn_handle->zfs_name));
316 }
317 }
318
319 /*
320 * Given a gathered changelist for the 'sharenfs' or 'sharesmb' property,
321 * unshare all the datasets in the list.
322 */
323 int
changelist_unshare(prop_changelist_t * clp,zfs_share_proto_t * proto)324 changelist_unshare(prop_changelist_t *clp, zfs_share_proto_t *proto)
325 {
326 prop_changenode_t *cn;
327 int ret = 0;
328
329 if (clp->cl_prop != ZFS_PROP_SHARENFS &&
330 clp->cl_prop != ZFS_PROP_SHARESMB)
331 return (0);
332
333 for (cn = uu_list_first(clp->cl_list); cn != NULL;
334 cn = uu_list_next(clp->cl_list, cn)) {
335 if (zfs_unshare_proto(cn->cn_handle, NULL, proto) != 0)
336 ret = -1;
337 }
338
339 return (ret);
340 }
341
342 /*
343 * Check if there is any child exported to a local zone in a given changelist.
344 * This information has already been recorded while gathering the changelist
345 * via changelist_gather().
346 */
347 int
changelist_haszonedchild(prop_changelist_t * clp)348 changelist_haszonedchild(prop_changelist_t *clp)
349 {
350 return (clp->cl_haszonedchild);
351 }
352
353 /*
354 * Remove a node from a gathered list.
355 */
356 void
changelist_remove(prop_changelist_t * clp,const char * name)357 changelist_remove(prop_changelist_t *clp, const char *name)
358 {
359 prop_changenode_t *cn;
360
361 for (cn = uu_list_first(clp->cl_list); cn != NULL;
362 cn = uu_list_next(clp->cl_list, cn)) {
363
364 if (strcmp(cn->cn_handle->zfs_name, name) == 0) {
365 uu_list_remove(clp->cl_list, cn);
366 zfs_close(cn->cn_handle);
367 free(cn);
368 return;
369 }
370 }
371 }
372
373 /*
374 * Release any memory associated with a changelist.
375 */
376 void
changelist_free(prop_changelist_t * clp)377 changelist_free(prop_changelist_t *clp)
378 {
379 prop_changenode_t *cn;
380 void *cookie;
381
382 if (clp->cl_list) {
383 cookie = NULL;
384 while ((cn = uu_list_teardown(clp->cl_list, &cookie)) != NULL) {
385 zfs_close(cn->cn_handle);
386 free(cn);
387 }
388
389 uu_list_destroy(clp->cl_list);
390 }
391 if (clp->cl_pool)
392 uu_list_pool_destroy(clp->cl_pool);
393
394 free(clp);
395 }
396
397 static int
change_one(zfs_handle_t * zhp,void * data)398 change_one(zfs_handle_t *zhp, void *data)
399 {
400 prop_changelist_t *clp = data;
401 char property[ZFS_MAXPROPLEN];
402 char where[64];
403 prop_changenode_t *cn;
404 zprop_source_t sourcetype;
405 zprop_source_t share_sourcetype;
406
407 /*
408 * We only want to unmount/unshare those filesystems that may inherit
409 * from the target filesystem. If we find any filesystem with a
410 * locally set mountpoint, we ignore any children since changing the
411 * property will not affect them. If this is a rename, we iterate
412 * over all children regardless, since we need them unmounted in
413 * order to do the rename. Also, if this is a volume and we're doing
414 * a rename, then always add it to the changelist.
415 */
416
417 if (!(ZFS_IS_VOLUME(zhp) && clp->cl_realprop == ZFS_PROP_NAME) &&
418 zfs_prop_get(zhp, clp->cl_prop, property,
419 sizeof (property), &sourcetype, where, sizeof (where),
420 B_FALSE) != 0) {
421 zfs_close(zhp);
422 return (0);
423 }
424
425 /*
426 * If we are "watching" sharenfs or sharesmb
427 * then check out the companion property which is tracked
428 * in cl_shareprop
429 */
430 if (clp->cl_shareprop != ZPROP_INVAL &&
431 zfs_prop_get(zhp, clp->cl_shareprop, property,
432 sizeof (property), &share_sourcetype, where, sizeof (where),
433 B_FALSE) != 0) {
434 zfs_close(zhp);
435 return (0);
436 }
437
438 if (clp->cl_alldependents || clp->cl_allchildren ||
439 sourcetype == ZPROP_SRC_DEFAULT ||
440 sourcetype == ZPROP_SRC_INHERITED ||
441 (clp->cl_shareprop != ZPROP_INVAL &&
442 (share_sourcetype == ZPROP_SRC_DEFAULT ||
443 share_sourcetype == ZPROP_SRC_INHERITED))) {
444 if ((cn = zfs_alloc(zfs_get_handle(zhp),
445 sizeof (prop_changenode_t))) == NULL) {
446 zfs_close(zhp);
447 return (-1);
448 }
449
450 cn->cn_handle = zhp;
451 cn->cn_mounted = (clp->cl_gflags & CL_GATHER_MOUNT_ALWAYS) ||
452 zfs_is_mounted(zhp, NULL);
453 cn->cn_shared = zfs_is_shared(zhp);
454 cn->cn_zoned = zfs_prop_get_int(zhp, ZFS_PROP_ZONED);
455 cn->cn_needpost = B_TRUE;
456
457 /* Indicate if any child is exported to a local zone. */
458 if (getzoneid() == GLOBAL_ZONEID && cn->cn_zoned)
459 clp->cl_haszonedchild = B_TRUE;
460
461 uu_list_node_init(cn, &cn->cn_listnode, clp->cl_pool);
462
463 if (clp->cl_sorted) {
464 uu_list_index_t idx;
465
466 (void) uu_list_find(clp->cl_list, cn, NULL,
467 &idx);
468 uu_list_insert(clp->cl_list, cn, idx);
469 } else {
470 /*
471 * Add this child to beginning of the list. Children
472 * below this one in the hierarchy will get added above
473 * this one in the list. This produces a list in
474 * reverse dataset name order.
475 * This is necessary when the original mountpoint
476 * is legacy or none.
477 */
478 verify(uu_list_insert_before(clp->cl_list,
479 uu_list_first(clp->cl_list), cn) == 0);
480 }
481
482 if (!clp->cl_alldependents)
483 return (zfs_iter_children(zhp, change_one, data));
484 } else {
485 zfs_close(zhp);
486 }
487
488 return (0);
489 }
490
491 /*ARGSUSED*/
492 static int
compare_mountpoints(const void * a,const void * b,void * unused)493 compare_mountpoints(const void *a, const void *b, void *unused)
494 {
495 const prop_changenode_t *ca = a;
496 const prop_changenode_t *cb = b;
497
498 char mounta[MAXPATHLEN];
499 char mountb[MAXPATHLEN];
500
501 boolean_t hasmounta, hasmountb;
502
503 /*
504 * When unsharing or unmounting filesystems, we need to do it in
505 * mountpoint order. This allows the user to have a mountpoint
506 * hierarchy that is different from the dataset hierarchy, and still
507 * allow it to be changed. However, if either dataset doesn't have a
508 * mountpoint (because it is a volume or a snapshot), we place it at the
509 * end of the list, because it doesn't affect our change at all.
510 */
511 hasmounta = (zfs_prop_get(ca->cn_handle, ZFS_PROP_MOUNTPOINT, mounta,
512 sizeof (mounta), NULL, NULL, 0, B_FALSE) == 0);
513 hasmountb = (zfs_prop_get(cb->cn_handle, ZFS_PROP_MOUNTPOINT, mountb,
514 sizeof (mountb), NULL, NULL, 0, B_FALSE) == 0);
515
516 if (!hasmounta && hasmountb)
517 return (-1);
518 else if (hasmounta && !hasmountb)
519 return (1);
520 else if (!hasmounta && !hasmountb)
521 return (0);
522 else
523 return (strcmp(mountb, mounta));
524 }
525
526 /*
527 * Given a ZFS handle and a property, construct a complete list of datasets
528 * that need to be modified as part of this process. For anything but the
529 * 'mountpoint' and 'sharenfs' properties, this just returns an empty list.
530 * Otherwise, we iterate over all children and look for any datasets that
531 * inherit the property. For each such dataset, we add it to the list and
532 * mark whether it was shared beforehand.
533 */
534 prop_changelist_t *
changelist_gather(zfs_handle_t * zhp,zfs_prop_t prop,int gather_flags,int mnt_flags)535 changelist_gather(zfs_handle_t *zhp, zfs_prop_t prop, int gather_flags,
536 int mnt_flags)
537 {
538 prop_changelist_t *clp;
539 prop_changenode_t *cn;
540 zfs_handle_t *temp;
541 char property[ZFS_MAXPROPLEN];
542 uu_compare_fn_t *compare = NULL;
543 boolean_t legacy = B_FALSE;
544
545 if ((clp = zfs_alloc(zhp->zfs_hdl, sizeof (prop_changelist_t))) == NULL)
546 return (NULL);
547
548 /*
549 * For mountpoint-related tasks, we want to sort everything by
550 * mountpoint, so that we mount and unmount them in the appropriate
551 * order, regardless of their position in the hierarchy.
552 */
553 if (prop == ZFS_PROP_NAME || prop == ZFS_PROP_ZONED ||
554 prop == ZFS_PROP_MOUNTPOINT || prop == ZFS_PROP_SHARENFS ||
555 prop == ZFS_PROP_SHARESMB) {
556
557 if (zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT,
558 property, sizeof (property),
559 NULL, NULL, 0, B_FALSE) == 0 &&
560 (strcmp(property, "legacy") == 0 ||
561 strcmp(property, "none") == 0)) {
562
563 legacy = B_TRUE;
564 }
565 if (!legacy) {
566 compare = compare_mountpoints;
567 clp->cl_sorted = B_TRUE;
568 }
569 }
570
571 clp->cl_pool = uu_list_pool_create("changelist_pool",
572 sizeof (prop_changenode_t),
573 offsetof(prop_changenode_t, cn_listnode),
574 compare, 0);
575 if (clp->cl_pool == NULL) {
576 assert(uu_error() == UU_ERROR_NO_MEMORY);
577 (void) zfs_error(zhp->zfs_hdl, EZFS_NOMEM, "internal error");
578 changelist_free(clp);
579 return (NULL);
580 }
581
582 clp->cl_list = uu_list_create(clp->cl_pool, NULL,
583 clp->cl_sorted ? UU_LIST_SORTED : 0);
584 clp->cl_gflags = gather_flags;
585 clp->cl_mflags = mnt_flags;
586
587 if (clp->cl_list == NULL) {
588 assert(uu_error() == UU_ERROR_NO_MEMORY);
589 (void) zfs_error(zhp->zfs_hdl, EZFS_NOMEM, "internal error");
590 changelist_free(clp);
591 return (NULL);
592 }
593
594 /*
595 * If this is a rename or the 'zoned' property, we pretend we're
596 * changing the mountpoint and flag it so we can catch all children in
597 * change_one().
598 *
599 * Flag cl_alldependents to catch all children plus the dependents
600 * (clones) that are not in the hierarchy.
601 */
602 if (prop == ZFS_PROP_NAME) {
603 clp->cl_prop = ZFS_PROP_MOUNTPOINT;
604 clp->cl_alldependents = B_TRUE;
605 } else if (prop == ZFS_PROP_ZONED) {
606 clp->cl_prop = ZFS_PROP_MOUNTPOINT;
607 clp->cl_allchildren = B_TRUE;
608 } else if (prop == ZFS_PROP_CANMOUNT) {
609 clp->cl_prop = ZFS_PROP_MOUNTPOINT;
610 } else if (prop == ZFS_PROP_VOLSIZE) {
611 clp->cl_prop = ZFS_PROP_MOUNTPOINT;
612 } else {
613 clp->cl_prop = prop;
614 }
615 clp->cl_realprop = prop;
616
617 if (clp->cl_prop != ZFS_PROP_MOUNTPOINT &&
618 clp->cl_prop != ZFS_PROP_SHARENFS &&
619 clp->cl_prop != ZFS_PROP_SHARESMB)
620 return (clp);
621
622 /*
623 * If watching SHARENFS or SHARESMB then
624 * also watch its companion property.
625 */
626 if (clp->cl_prop == ZFS_PROP_SHARENFS)
627 clp->cl_shareprop = ZFS_PROP_SHARESMB;
628 else if (clp->cl_prop == ZFS_PROP_SHARESMB)
629 clp->cl_shareprop = ZFS_PROP_SHARENFS;
630
631 if (clp->cl_alldependents) {
632 if (zfs_iter_dependents(zhp, B_TRUE, change_one, clp) != 0) {
633 changelist_free(clp);
634 return (NULL);
635 }
636 } else if (zfs_iter_children(zhp, change_one, clp) != 0) {
637 changelist_free(clp);
638 return (NULL);
639 }
640
641 /*
642 * We have to re-open ourselves because we auto-close all the handles
643 * and can't tell the difference.
644 */
645 if ((temp = zfs_open(zhp->zfs_hdl, zfs_get_name(zhp),
646 ZFS_TYPE_DATASET)) == NULL) {
647 changelist_free(clp);
648 return (NULL);
649 }
650
651 /*
652 * Always add ourself to the list. We add ourselves to the end so that
653 * we're the last to be unmounted.
654 */
655 if ((cn = zfs_alloc(zhp->zfs_hdl,
656 sizeof (prop_changenode_t))) == NULL) {
657 zfs_close(temp);
658 changelist_free(clp);
659 return (NULL);
660 }
661
662 cn->cn_handle = temp;
663 cn->cn_mounted = (clp->cl_gflags & CL_GATHER_MOUNT_ALWAYS) ||
664 zfs_is_mounted(temp, NULL);
665 cn->cn_shared = zfs_is_shared(temp);
666 cn->cn_zoned = zfs_prop_get_int(zhp, ZFS_PROP_ZONED);
667 cn->cn_needpost = B_TRUE;
668
669 uu_list_node_init(cn, &cn->cn_listnode, clp->cl_pool);
670 if (clp->cl_sorted) {
671 uu_list_index_t idx;
672 (void) uu_list_find(clp->cl_list, cn, NULL, &idx);
673 uu_list_insert(clp->cl_list, cn, idx);
674 } else {
675 /*
676 * Add the target dataset to the end of the list.
677 * The list is not really unsorted. The list will be
678 * in reverse dataset name order. This is necessary
679 * when the original mountpoint is legacy or none.
680 */
681 verify(uu_list_insert_after(clp->cl_list,
682 uu_list_last(clp->cl_list), cn) == 0);
683 }
684
685 /*
686 * If the mountpoint property was previously 'legacy', or 'none',
687 * record it as the behavior of changelist_postfix() will be different.
688 */
689 if ((clp->cl_prop == ZFS_PROP_MOUNTPOINT) && legacy) {
690 /*
691 * do not automatically mount ex-legacy datasets if
692 * we specifically set canmount to noauto
693 */
694 if (zfs_prop_get_int(zhp, ZFS_PROP_CANMOUNT) !=
695 ZFS_CANMOUNT_NOAUTO)
696 clp->cl_waslegacy = B_TRUE;
697 }
698
699 return (clp);
700 }
701