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34dc7c2f BB |
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 | /* | |
428870ff | 23 | * Copyright 2010 Sun Microsystems, Inc. All rights reserved. |
34dc7c2f BB |
24 | * Use is subject to license terms. |
25 | * | |
26 | * Portions Copyright 2007 Ramprakash Jelari | |
c15d36c6 | 27 | * Copyright (c) 2014, 2020 by Delphix. All rights reserved. |
23d70cde | 28 | * Copyright 2016 Igor Kozhukhov <ikozhukhov@gmail.com> |
0c6d0936 | 29 | * Copyright (c) 2018 Datto Inc. |
34dc7c2f BB |
30 | */ |
31 | ||
34dc7c2f BB |
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? */ | |
0c6d0936 | 72 | uu_avl_node_t cn_treenode; |
34dc7c2f BB |
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 */ | |
0c6d0936 AP |
79 | uu_avl_pool_t *cl_pool; |
80 | uu_avl_t *cl_tree; | |
34dc7c2f BB |
81 | boolean_t cl_waslegacy; |
82 | boolean_t cl_allchildren; | |
83 | boolean_t cl_alldependents; | |
b128c09f BB |
84 | int cl_mflags; /* Mount flags */ |
85 | int cl_gflags; /* Gather request flags */ | |
34dc7c2f | 86 | boolean_t cl_haszonedchild; |
34dc7c2f BB |
87 | }; |
88 | ||
89 | /* | |
90 | * If the property is 'mountpoint', go through and unmount filesystems as | |
91 | * necessary. We don't do the same for 'sharenfs', because we can just re-share | |
92 | * with different options without interrupting service. We do handle 'sharesmb' | |
93 | * since there may be old resource names that need to be removed. | |
94 | */ | |
95 | int | |
96 | changelist_prefix(prop_changelist_t *clp) | |
97 | { | |
98 | prop_changenode_t *cn; | |
0c6d0936 | 99 | uu_avl_walk_t *walk; |
34dc7c2f | 100 | int ret = 0; |
c15d36c6 | 101 | boolean_t commit_smb_shares = B_FALSE; |
34dc7c2f BB |
102 | |
103 | if (clp->cl_prop != ZFS_PROP_MOUNTPOINT && | |
104 | clp->cl_prop != ZFS_PROP_SHARESMB) | |
105 | return (0); | |
106 | ||
0c6d0936 AP |
107 | if ((walk = uu_avl_walk_start(clp->cl_tree, UU_WALK_ROBUST)) == NULL) |
108 | return (-1); | |
109 | ||
110 | while ((cn = uu_avl_walk_next(walk)) != NULL) { | |
34dc7c2f BB |
111 | |
112 | /* if a previous loop failed, set the remaining to false */ | |
113 | if (ret == -1) { | |
114 | cn->cn_needpost = B_FALSE; | |
115 | continue; | |
116 | } | |
117 | ||
118 | /* | |
119 | * If we are in the global zone, but this dataset is exported | |
120 | * to a local zone, do nothing. | |
121 | */ | |
122 | if (getzoneid() == GLOBAL_ZONEID && cn->cn_zoned) | |
123 | continue; | |
124 | ||
428870ff | 125 | if (!ZFS_IS_VOLUME(cn->cn_handle)) { |
34dc7c2f BB |
126 | /* |
127 | * Do the property specific processing. | |
128 | */ | |
129 | switch (clp->cl_prop) { | |
130 | case ZFS_PROP_MOUNTPOINT: | |
131 | if (zfs_unmount(cn->cn_handle, NULL, | |
b128c09f | 132 | clp->cl_mflags) != 0) { |
34dc7c2f BB |
133 | ret = -1; |
134 | cn->cn_needpost = B_FALSE; | |
135 | } | |
136 | break; | |
137 | case ZFS_PROP_SHARESMB: | |
138 | (void) zfs_unshare_smb(cn->cn_handle, NULL); | |
c15d36c6 | 139 | commit_smb_shares = B_TRUE; |
34dc7c2f | 140 | break; |
23d70cde | 141 | |
e75c13c3 BB |
142 | default: |
143 | break; | |
34dc7c2f BB |
144 | } |
145 | } | |
146 | } | |
147 | ||
c15d36c6 GW |
148 | if (commit_smb_shares) |
149 | zfs_commit_smb_shares(); | |
0c6d0936 AP |
150 | uu_avl_walk_end(walk); |
151 | ||
34dc7c2f BB |
152 | if (ret == -1) |
153 | (void) changelist_postfix(clp); | |
154 | ||
155 | return (ret); | |
156 | } | |
157 | ||
158 | /* | |
159 | * If the property is 'mountpoint' or 'sharenfs', go through and remount and/or | |
160 | * reshare the filesystems as necessary. In changelist_gather() we recorded | |
161 | * whether the filesystem was previously shared or mounted. The action we take | |
162 | * depends on the previous state, and whether the value was previously 'legacy'. | |
163 | * For non-legacy properties, we only remount/reshare the filesystem if it was | |
164 | * previously mounted/shared. Otherwise, we always remount/reshare the | |
165 | * filesystem. | |
166 | */ | |
167 | int | |
168 | changelist_postfix(prop_changelist_t *clp) | |
169 | { | |
170 | prop_changenode_t *cn; | |
0c6d0936 | 171 | uu_avl_walk_t *walk; |
34dc7c2f BB |
172 | char shareopts[ZFS_MAXPROPLEN]; |
173 | int errors = 0; | |
c15d36c6 GW |
174 | boolean_t commit_smb_shares = B_FALSE; |
175 | boolean_t commit_nfs_shares = B_FALSE; | |
34dc7c2f BB |
176 | |
177 | /* | |
178 | * If we're changing the mountpoint, attempt to destroy the underlying | |
179 | * mountpoint. All other datasets will have inherited from this dataset | |
180 | * (in which case their mountpoints exist in the filesystem in the new | |
181 | * location), or have explicit mountpoints set (in which case they won't | |
182 | * be in the changelist). | |
183 | */ | |
0c6d0936 | 184 | if ((cn = uu_avl_last(clp->cl_tree)) == NULL) |
34dc7c2f BB |
185 | return (0); |
186 | ||
187 | if (clp->cl_prop == ZFS_PROP_MOUNTPOINT) | |
188 | remove_mountpoint(cn->cn_handle); | |
189 | ||
34dc7c2f BB |
190 | /* |
191 | * We walk the datasets in reverse, because we want to mount any parent | |
192 | * datasets before mounting the children. We walk all datasets even if | |
193 | * there are errors. | |
194 | */ | |
0c6d0936 AP |
195 | if ((walk = uu_avl_walk_start(clp->cl_tree, |
196 | UU_WALK_REVERSE | UU_WALK_ROBUST)) == NULL) | |
197 | return (-1); | |
198 | ||
199 | while ((cn = uu_avl_walk_next(walk)) != NULL) { | |
34dc7c2f BB |
200 | |
201 | boolean_t sharenfs; | |
202 | boolean_t sharesmb; | |
9babb374 | 203 | boolean_t mounted; |
b5256303 | 204 | boolean_t needs_key; |
34dc7c2f BB |
205 | |
206 | /* | |
207 | * If we are in the global zone, but this dataset is exported | |
208 | * to a local zone, do nothing. | |
209 | */ | |
210 | if (getzoneid() == GLOBAL_ZONEID && cn->cn_zoned) | |
211 | continue; | |
212 | ||
213 | /* Only do post-processing if it's required */ | |
214 | if (!cn->cn_needpost) | |
215 | continue; | |
216 | cn->cn_needpost = B_FALSE; | |
217 | ||
218 | zfs_refresh_properties(cn->cn_handle); | |
219 | ||
428870ff | 220 | if (ZFS_IS_VOLUME(cn->cn_handle)) |
34dc7c2f | 221 | continue; |
34dc7c2f BB |
222 | |
223 | /* | |
224 | * Remount if previously mounted or mountpoint was legacy, | |
225 | * or sharenfs or sharesmb property is set. | |
226 | */ | |
227 | sharenfs = ((zfs_prop_get(cn->cn_handle, ZFS_PROP_SHARENFS, | |
228 | shareopts, sizeof (shareopts), NULL, NULL, 0, | |
229 | B_FALSE) == 0) && (strcmp(shareopts, "off") != 0)); | |
230 | ||
231 | sharesmb = ((zfs_prop_get(cn->cn_handle, ZFS_PROP_SHARESMB, | |
232 | shareopts, sizeof (shareopts), NULL, NULL, 0, | |
233 | B_FALSE) == 0) && (strcmp(shareopts, "off") != 0)); | |
234 | ||
b5256303 TC |
235 | needs_key = (zfs_prop_get_int(cn->cn_handle, |
236 | ZFS_PROP_KEYSTATUS) == ZFS_KEYSTATUS_UNAVAILABLE); | |
237 | ||
9babb374 BB |
238 | mounted = zfs_is_mounted(cn->cn_handle, NULL); |
239 | ||
b5256303 | 240 | if (!mounted && !needs_key && (cn->cn_mounted || |
9babb374 BB |
241 | ((sharenfs || sharesmb || clp->cl_waslegacy) && |
242 | (zfs_prop_get_int(cn->cn_handle, | |
243 | ZFS_PROP_CANMOUNT) == ZFS_CANMOUNT_ON)))) { | |
244 | ||
245 | if (zfs_mount(cn->cn_handle, NULL, 0) != 0) | |
246 | errors++; | |
247 | else | |
248 | mounted = TRUE; | |
249 | } | |
34dc7c2f BB |
250 | |
251 | /* | |
9babb374 BB |
252 | * If the file system is mounted we always re-share even |
253 | * if the filesystem is currently shared, so that we can | |
254 | * adopt any new options. | |
34dc7c2f | 255 | */ |
c15d36c6 | 256 | if (sharenfs && mounted) { |
34dc7c2f | 257 | errors += zfs_share_nfs(cn->cn_handle); |
c15d36c6 GW |
258 | commit_nfs_shares = B_TRUE; |
259 | } else if (cn->cn_shared || clp->cl_waslegacy) { | |
34dc7c2f | 260 | errors += zfs_unshare_nfs(cn->cn_handle, NULL); |
c15d36c6 GW |
261 | commit_nfs_shares = B_TRUE; |
262 | } | |
263 | if (sharesmb && mounted) { | |
34dc7c2f | 264 | errors += zfs_share_smb(cn->cn_handle); |
c15d36c6 GW |
265 | commit_smb_shares = B_TRUE; |
266 | } else if (cn->cn_shared || clp->cl_waslegacy) { | |
34dc7c2f | 267 | errors += zfs_unshare_smb(cn->cn_handle, NULL); |
c15d36c6 GW |
268 | commit_smb_shares = B_TRUE; |
269 | } | |
34dc7c2f | 270 | } |
c15d36c6 GW |
271 | if (commit_nfs_shares) |
272 | zfs_commit_nfs_shares(); | |
273 | if (commit_smb_shares) | |
274 | zfs_commit_smb_shares(); | |
0c6d0936 AP |
275 | uu_avl_walk_end(walk); |
276 | ||
34dc7c2f BB |
277 | return (errors ? -1 : 0); |
278 | } | |
279 | ||
280 | /* | |
281 | * Is this "dataset" a child of "parent"? | |
282 | */ | |
283 | boolean_t | |
284 | isa_child_of(const char *dataset, const char *parent) | |
285 | { | |
286 | int len; | |
287 | ||
288 | len = strlen(parent); | |
289 | ||
290 | if (strncmp(dataset, parent, len) == 0 && | |
291 | (dataset[len] == '@' || dataset[len] == '/' || | |
292 | dataset[len] == '\0')) | |
293 | return (B_TRUE); | |
294 | else | |
295 | return (B_FALSE); | |
296 | ||
297 | } | |
298 | ||
299 | /* | |
300 | * If we rename a filesystem, child filesystem handles are no longer valid | |
301 | * since we identify each dataset by its name in the ZFS namespace. As a | |
302 | * result, we have to go through and fix up all the names appropriately. We | |
303 | * could do this automatically if libzfs kept track of all open handles, but | |
304 | * this is a lot less work. | |
305 | */ | |
306 | void | |
307 | changelist_rename(prop_changelist_t *clp, const char *src, const char *dst) | |
308 | { | |
309 | prop_changenode_t *cn; | |
0c6d0936 | 310 | uu_avl_walk_t *walk; |
eca7b760 | 311 | char newname[ZFS_MAX_DATASET_NAME_LEN]; |
34dc7c2f | 312 | |
0c6d0936 AP |
313 | if ((walk = uu_avl_walk_start(clp->cl_tree, UU_WALK_ROBUST)) == NULL) |
314 | return; | |
315 | ||
316 | while ((cn = uu_avl_walk_next(walk)) != NULL) { | |
34dc7c2f BB |
317 | /* |
318 | * Do not rename a clone that's not in the source hierarchy. | |
319 | */ | |
ba6a2402 | 320 | if (!isa_child_of(cn->cn_handle->zfs_name, src)) |
34dc7c2f BB |
321 | continue; |
322 | ||
323 | /* | |
324 | * Destroy the previous mountpoint if needed. | |
325 | */ | |
ba6a2402 | 326 | remove_mountpoint(cn->cn_handle); |
34dc7c2f BB |
327 | |
328 | (void) strlcpy(newname, dst, sizeof (newname)); | |
0b78aeae B |
329 | (void) strlcat(newname, cn->cn_handle->zfs_name + strlen(src), |
330 | sizeof (newname)); | |
34dc7c2f | 331 | |
ba6a2402 BB |
332 | (void) strlcpy(cn->cn_handle->zfs_name, newname, |
333 | sizeof (cn->cn_handle->zfs_name)); | |
34dc7c2f | 334 | } |
0c6d0936 AP |
335 | |
336 | uu_avl_walk_end(walk); | |
34dc7c2f BB |
337 | } |
338 | ||
339 | /* | |
340 | * Given a gathered changelist for the 'sharenfs' or 'sharesmb' property, | |
341 | * unshare all the datasets in the list. | |
342 | */ | |
343 | int | |
344 | changelist_unshare(prop_changelist_t *clp, zfs_share_proto_t *proto) | |
345 | { | |
346 | prop_changenode_t *cn; | |
0c6d0936 | 347 | uu_avl_walk_t *walk; |
34dc7c2f BB |
348 | int ret = 0; |
349 | ||
350 | if (clp->cl_prop != ZFS_PROP_SHARENFS && | |
351 | clp->cl_prop != ZFS_PROP_SHARESMB) | |
352 | return (0); | |
353 | ||
0c6d0936 AP |
354 | if ((walk = uu_avl_walk_start(clp->cl_tree, UU_WALK_ROBUST)) == NULL) |
355 | return (-1); | |
356 | ||
357 | while ((cn = uu_avl_walk_next(walk)) != NULL) { | |
34dc7c2f BB |
358 | if (zfs_unshare_proto(cn->cn_handle, NULL, proto) != 0) |
359 | ret = -1; | |
360 | } | |
361 | ||
c15d36c6 | 362 | zfs_commit_proto(proto); |
0c6d0936 AP |
363 | uu_avl_walk_end(walk); |
364 | ||
34dc7c2f BB |
365 | return (ret); |
366 | } | |
367 | ||
368 | /* | |
369 | * Check if there is any child exported to a local zone in a given changelist. | |
370 | * This information has already been recorded while gathering the changelist | |
371 | * via changelist_gather(). | |
372 | */ | |
373 | int | |
374 | changelist_haszonedchild(prop_changelist_t *clp) | |
375 | { | |
376 | return (clp->cl_haszonedchild); | |
377 | } | |
378 | ||
379 | /* | |
380 | * Remove a node from a gathered list. | |
381 | */ | |
382 | void | |
383 | changelist_remove(prop_changelist_t *clp, const char *name) | |
384 | { | |
385 | prop_changenode_t *cn; | |
0c6d0936 | 386 | uu_avl_walk_t *walk; |
34dc7c2f | 387 | |
0c6d0936 AP |
388 | if ((walk = uu_avl_walk_start(clp->cl_tree, UU_WALK_ROBUST)) == NULL) |
389 | return; | |
34dc7c2f | 390 | |
0c6d0936 | 391 | while ((cn = uu_avl_walk_next(walk)) != NULL) { |
34dc7c2f | 392 | if (strcmp(cn->cn_handle->zfs_name, name) == 0) { |
0c6d0936 | 393 | uu_avl_remove(clp->cl_tree, cn); |
34dc7c2f BB |
394 | zfs_close(cn->cn_handle); |
395 | free(cn); | |
0c6d0936 | 396 | uu_avl_walk_end(walk); |
34dc7c2f BB |
397 | return; |
398 | } | |
399 | } | |
0c6d0936 AP |
400 | |
401 | uu_avl_walk_end(walk); | |
34dc7c2f BB |
402 | } |
403 | ||
404 | /* | |
405 | * Release any memory associated with a changelist. | |
406 | */ | |
407 | void | |
408 | changelist_free(prop_changelist_t *clp) | |
409 | { | |
410 | prop_changenode_t *cn; | |
34dc7c2f | 411 | |
0c6d0936 AP |
412 | if (clp->cl_tree) { |
413 | uu_avl_walk_t *walk; | |
414 | ||
415 | if ((walk = uu_avl_walk_start(clp->cl_tree, | |
416 | UU_WALK_ROBUST)) == NULL) | |
417 | return; | |
418 | ||
419 | while ((cn = uu_avl_walk_next(walk)) != NULL) { | |
420 | uu_avl_remove(clp->cl_tree, cn); | |
34dc7c2f BB |
421 | zfs_close(cn->cn_handle); |
422 | free(cn); | |
423 | } | |
424 | ||
0c6d0936 AP |
425 | uu_avl_walk_end(walk); |
426 | uu_avl_destroy(clp->cl_tree); | |
34dc7c2f BB |
427 | } |
428 | if (clp->cl_pool) | |
0c6d0936 | 429 | uu_avl_pool_destroy(clp->cl_pool); |
34dc7c2f BB |
430 | |
431 | free(clp); | |
432 | } | |
433 | ||
0c6d0936 AP |
434 | /* |
435 | * Add one dataset to changelist | |
436 | */ | |
437 | static int | |
438 | changelist_add_mounted(zfs_handle_t *zhp, void *data) | |
439 | { | |
440 | prop_changelist_t *clp = data; | |
441 | prop_changenode_t *cn; | |
442 | uu_avl_index_t idx; | |
443 | ||
444 | ASSERT3U(clp->cl_prop, ==, ZFS_PROP_MOUNTPOINT); | |
445 | ||
446 | if ((cn = zfs_alloc(zfs_get_handle(zhp), | |
447 | sizeof (prop_changenode_t))) == NULL) { | |
448 | zfs_close(zhp); | |
449 | return (ENOMEM); | |
450 | } | |
451 | ||
452 | cn->cn_handle = zhp; | |
453 | cn->cn_mounted = zfs_is_mounted(zhp, NULL); | |
454 | ASSERT3U(cn->cn_mounted, ==, B_TRUE); | |
455 | cn->cn_shared = zfs_is_shared(zhp); | |
456 | cn->cn_zoned = zfs_prop_get_int(zhp, ZFS_PROP_ZONED); | |
457 | cn->cn_needpost = B_TRUE; | |
458 | ||
459 | /* Indicate if any child is exported to a local zone. */ | |
460 | if (getzoneid() == GLOBAL_ZONEID && cn->cn_zoned) | |
461 | clp->cl_haszonedchild = B_TRUE; | |
462 | ||
463 | uu_avl_node_init(cn, &cn->cn_treenode, clp->cl_pool); | |
464 | ||
465 | if (uu_avl_find(clp->cl_tree, cn, NULL, &idx) == NULL) { | |
466 | uu_avl_insert(clp->cl_tree, cn, idx); | |
467 | } else { | |
468 | free(cn); | |
469 | zfs_close(zhp); | |
470 | } | |
471 | ||
472 | return (0); | |
473 | } | |
474 | ||
34dc7c2f BB |
475 | static int |
476 | change_one(zfs_handle_t *zhp, void *data) | |
477 | { | |
478 | prop_changelist_t *clp = data; | |
479 | char property[ZFS_MAXPROPLEN]; | |
480 | char where[64]; | |
e6cebbf8 | 481 | prop_changenode_t *cn = NULL; |
45cb520b G |
482 | zprop_source_t sourcetype = ZPROP_SRC_NONE; |
483 | zprop_source_t share_sourcetype = ZPROP_SRC_NONE; | |
e6cebbf8 | 484 | int ret = 0; |
34dc7c2f BB |
485 | |
486 | /* | |
487 | * We only want to unmount/unshare those filesystems that may inherit | |
488 | * from the target filesystem. If we find any filesystem with a | |
489 | * locally set mountpoint, we ignore any children since changing the | |
490 | * property will not affect them. If this is a rename, we iterate | |
491 | * over all children regardless, since we need them unmounted in | |
492 | * order to do the rename. Also, if this is a volume and we're doing | |
493 | * a rename, then always add it to the changelist. | |
494 | */ | |
495 | ||
496 | if (!(ZFS_IS_VOLUME(zhp) && clp->cl_realprop == ZFS_PROP_NAME) && | |
497 | zfs_prop_get(zhp, clp->cl_prop, property, | |
498 | sizeof (property), &sourcetype, where, sizeof (where), | |
499 | B_FALSE) != 0) { | |
e6cebbf8 | 500 | goto out; |
34dc7c2f BB |
501 | } |
502 | ||
503 | /* | |
504 | * If we are "watching" sharenfs or sharesmb | |
505 | * then check out the companion property which is tracked | |
506 | * in cl_shareprop | |
507 | */ | |
508 | if (clp->cl_shareprop != ZPROP_INVAL && | |
509 | zfs_prop_get(zhp, clp->cl_shareprop, property, | |
510 | sizeof (property), &share_sourcetype, where, sizeof (where), | |
511 | B_FALSE) != 0) { | |
e6cebbf8 | 512 | goto out; |
34dc7c2f BB |
513 | } |
514 | ||
515 | if (clp->cl_alldependents || clp->cl_allchildren || | |
516 | sourcetype == ZPROP_SRC_DEFAULT || | |
517 | sourcetype == ZPROP_SRC_INHERITED || | |
518 | (clp->cl_shareprop != ZPROP_INVAL && | |
519 | (share_sourcetype == ZPROP_SRC_DEFAULT || | |
520 | share_sourcetype == ZPROP_SRC_INHERITED))) { | |
521 | if ((cn = zfs_alloc(zfs_get_handle(zhp), | |
522 | sizeof (prop_changenode_t))) == NULL) { | |
e6cebbf8 PZ |
523 | ret = -1; |
524 | goto out; | |
34dc7c2f BB |
525 | } |
526 | ||
527 | cn->cn_handle = zhp; | |
b128c09f BB |
528 | cn->cn_mounted = (clp->cl_gflags & CL_GATHER_MOUNT_ALWAYS) || |
529 | zfs_is_mounted(zhp, NULL); | |
34dc7c2f BB |
530 | cn->cn_shared = zfs_is_shared(zhp); |
531 | cn->cn_zoned = zfs_prop_get_int(zhp, ZFS_PROP_ZONED); | |
532 | cn->cn_needpost = B_TRUE; | |
533 | ||
534 | /* Indicate if any child is exported to a local zone. */ | |
535 | if (getzoneid() == GLOBAL_ZONEID && cn->cn_zoned) | |
536 | clp->cl_haszonedchild = B_TRUE; | |
537 | ||
0c6d0936 | 538 | uu_avl_node_init(cn, &cn->cn_treenode, clp->cl_pool); |
34dc7c2f | 539 | |
0c6d0936 | 540 | uu_avl_index_t idx; |
34dc7c2f | 541 | |
0c6d0936 AP |
542 | if (uu_avl_find(clp->cl_tree, cn, NULL, &idx) == NULL) { |
543 | uu_avl_insert(clp->cl_tree, cn, idx); | |
34dc7c2f | 544 | } else { |
0c6d0936 | 545 | free(cn); |
e6cebbf8 | 546 | cn = NULL; |
34dc7c2f BB |
547 | } |
548 | ||
549 | if (!clp->cl_alldependents) | |
e6cebbf8 PZ |
550 | ret = zfs_iter_children(zhp, change_one, data); |
551 | ||
552 | /* | |
553 | * If we added the handle to the changelist, we will re-use it | |
554 | * later so return without closing it. | |
555 | */ | |
556 | if (cn != NULL) | |
557 | return (ret); | |
34dc7c2f BB |
558 | } |
559 | ||
e6cebbf8 PZ |
560 | out: |
561 | zfs_close(zhp); | |
562 | return (ret); | |
34dc7c2f BB |
563 | } |
564 | ||
34dc7c2f | 565 | static int |
50a343d8 | 566 | compare_props(const void *a, const void *b, zfs_prop_t prop) |
34dc7c2f BB |
567 | { |
568 | const prop_changenode_t *ca = a; | |
569 | const prop_changenode_t *cb = b; | |
570 | ||
50a343d8 AP |
571 | char propa[MAXPATHLEN]; |
572 | char propb[MAXPATHLEN]; | |
573 | ||
574 | boolean_t haspropa, haspropb; | |
34dc7c2f | 575 | |
50a343d8 AP |
576 | haspropa = (zfs_prop_get(ca->cn_handle, prop, propa, sizeof (propa), |
577 | NULL, NULL, 0, B_FALSE) == 0); | |
578 | haspropb = (zfs_prop_get(cb->cn_handle, prop, propb, sizeof (propb), | |
579 | NULL, NULL, 0, B_FALSE) == 0); | |
34dc7c2f | 580 | |
50a343d8 AP |
581 | if (!haspropa && haspropb) |
582 | return (-1); | |
583 | else if (haspropa && !haspropb) | |
584 | return (1); | |
585 | else if (!haspropa && !haspropb) | |
586 | return (0); | |
587 | else | |
588 | return (strcmp(propb, propa)); | |
589 | } | |
590 | ||
591 | /*ARGSUSED*/ | |
592 | static int | |
593 | compare_mountpoints(const void *a, const void *b, void *unused) | |
594 | { | |
34dc7c2f BB |
595 | /* |
596 | * When unsharing or unmounting filesystems, we need to do it in | |
597 | * mountpoint order. This allows the user to have a mountpoint | |
598 | * hierarchy that is different from the dataset hierarchy, and still | |
50a343d8 | 599 | * allow it to be changed. |
34dc7c2f | 600 | */ |
50a343d8 AP |
601 | return (compare_props(a, b, ZFS_PROP_MOUNTPOINT)); |
602 | } | |
34dc7c2f | 603 | |
50a343d8 AP |
604 | /*ARGSUSED*/ |
605 | static int | |
606 | compare_dataset_names(const void *a, const void *b, void *unused) | |
607 | { | |
608 | return (compare_props(a, b, ZFS_PROP_NAME)); | |
34dc7c2f BB |
609 | } |
610 | ||
611 | /* | |
612 | * Given a ZFS handle and a property, construct a complete list of datasets | |
613 | * that need to be modified as part of this process. For anything but the | |
614 | * 'mountpoint' and 'sharenfs' properties, this just returns an empty list. | |
615 | * Otherwise, we iterate over all children and look for any datasets that | |
616 | * inherit the property. For each such dataset, we add it to the list and | |
617 | * mark whether it was shared beforehand. | |
618 | */ | |
619 | prop_changelist_t * | |
b128c09f BB |
620 | changelist_gather(zfs_handle_t *zhp, zfs_prop_t prop, int gather_flags, |
621 | int mnt_flags) | |
34dc7c2f BB |
622 | { |
623 | prop_changelist_t *clp; | |
624 | prop_changenode_t *cn; | |
625 | zfs_handle_t *temp; | |
626 | char property[ZFS_MAXPROPLEN]; | |
45d1cae3 | 627 | boolean_t legacy = B_FALSE; |
34dc7c2f BB |
628 | |
629 | if ((clp = zfs_alloc(zhp->zfs_hdl, sizeof (prop_changelist_t))) == NULL) | |
630 | return (NULL); | |
631 | ||
632 | /* | |
633 | * For mountpoint-related tasks, we want to sort everything by | |
634 | * mountpoint, so that we mount and unmount them in the appropriate | |
635 | * order, regardless of their position in the hierarchy. | |
636 | */ | |
637 | if (prop == ZFS_PROP_NAME || prop == ZFS_PROP_ZONED || | |
638 | prop == ZFS_PROP_MOUNTPOINT || prop == ZFS_PROP_SHARENFS || | |
639 | prop == ZFS_PROP_SHARESMB) { | |
45d1cae3 BB |
640 | |
641 | if (zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, | |
642 | property, sizeof (property), | |
643 | NULL, NULL, 0, B_FALSE) == 0 && | |
644 | (strcmp(property, "legacy") == 0 || | |
645 | strcmp(property, "none") == 0)) { | |
45d1cae3 BB |
646 | legacy = B_TRUE; |
647 | } | |
34dc7c2f BB |
648 | } |
649 | ||
0c6d0936 | 650 | clp->cl_pool = uu_avl_pool_create("changelist_pool", |
34dc7c2f | 651 | sizeof (prop_changenode_t), |
0c6d0936 | 652 | offsetof(prop_changenode_t, cn_treenode), |
50a343d8 | 653 | legacy ? compare_dataset_names : compare_mountpoints, 0); |
34dc7c2f BB |
654 | if (clp->cl_pool == NULL) { |
655 | assert(uu_error() == UU_ERROR_NO_MEMORY); | |
656 | (void) zfs_error(zhp->zfs_hdl, EZFS_NOMEM, "internal error"); | |
657 | changelist_free(clp); | |
658 | return (NULL); | |
659 | } | |
660 | ||
0c6d0936 | 661 | clp->cl_tree = uu_avl_create(clp->cl_pool, NULL, UU_DEFAULT); |
b128c09f BB |
662 | clp->cl_gflags = gather_flags; |
663 | clp->cl_mflags = mnt_flags; | |
34dc7c2f | 664 | |
0c6d0936 | 665 | if (clp->cl_tree == NULL) { |
34dc7c2f BB |
666 | assert(uu_error() == UU_ERROR_NO_MEMORY); |
667 | (void) zfs_error(zhp->zfs_hdl, EZFS_NOMEM, "internal error"); | |
668 | changelist_free(clp); | |
669 | return (NULL); | |
670 | } | |
671 | ||
672 | /* | |
673 | * If this is a rename or the 'zoned' property, we pretend we're | |
674 | * changing the mountpoint and flag it so we can catch all children in | |
675 | * change_one(). | |
676 | * | |
677 | * Flag cl_alldependents to catch all children plus the dependents | |
678 | * (clones) that are not in the hierarchy. | |
679 | */ | |
680 | if (prop == ZFS_PROP_NAME) { | |
681 | clp->cl_prop = ZFS_PROP_MOUNTPOINT; | |
682 | clp->cl_alldependents = B_TRUE; | |
683 | } else if (prop == ZFS_PROP_ZONED) { | |
684 | clp->cl_prop = ZFS_PROP_MOUNTPOINT; | |
685 | clp->cl_allchildren = B_TRUE; | |
686 | } else if (prop == ZFS_PROP_CANMOUNT) { | |
687 | clp->cl_prop = ZFS_PROP_MOUNTPOINT; | |
688 | } else if (prop == ZFS_PROP_VOLSIZE) { | |
689 | clp->cl_prop = ZFS_PROP_MOUNTPOINT; | |
34dc7c2f BB |
690 | } else { |
691 | clp->cl_prop = prop; | |
692 | } | |
693 | clp->cl_realprop = prop; | |
694 | ||
695 | if (clp->cl_prop != ZFS_PROP_MOUNTPOINT && | |
696 | clp->cl_prop != ZFS_PROP_SHARENFS && | |
428870ff | 697 | clp->cl_prop != ZFS_PROP_SHARESMB) |
34dc7c2f BB |
698 | return (clp); |
699 | ||
700 | /* | |
701 | * If watching SHARENFS or SHARESMB then | |
702 | * also watch its companion property. | |
703 | */ | |
704 | if (clp->cl_prop == ZFS_PROP_SHARENFS) | |
705 | clp->cl_shareprop = ZFS_PROP_SHARESMB; | |
706 | else if (clp->cl_prop == ZFS_PROP_SHARESMB) | |
707 | clp->cl_shareprop = ZFS_PROP_SHARENFS; | |
708 | ||
0c6d0936 | 709 | if (clp->cl_prop == ZFS_PROP_MOUNTPOINT && |
50a343d8 | 710 | (clp->cl_gflags & CL_GATHER_ITER_MOUNTED)) { |
0c6d0936 AP |
711 | /* |
712 | * Instead of iterating through all of the dataset children we | |
713 | * gather mounted dataset children from MNTTAB | |
714 | */ | |
715 | if (zfs_iter_mounted(zhp, changelist_add_mounted, clp) != 0) { | |
716 | changelist_free(clp); | |
717 | return (NULL); | |
718 | } | |
719 | } else if (clp->cl_alldependents) { | |
34dc7c2f BB |
720 | if (zfs_iter_dependents(zhp, B_TRUE, change_one, clp) != 0) { |
721 | changelist_free(clp); | |
722 | return (NULL); | |
723 | } | |
724 | } else if (zfs_iter_children(zhp, change_one, clp) != 0) { | |
725 | changelist_free(clp); | |
726 | return (NULL); | |
727 | } | |
728 | ||
729 | /* | |
730 | * We have to re-open ourselves because we auto-close all the handles | |
731 | * and can't tell the difference. | |
732 | */ | |
733 | if ((temp = zfs_open(zhp->zfs_hdl, zfs_get_name(zhp), | |
734 | ZFS_TYPE_DATASET)) == NULL) { | |
735 | changelist_free(clp); | |
736 | return (NULL); | |
737 | } | |
738 | ||
739 | /* | |
740 | * Always add ourself to the list. We add ourselves to the end so that | |
741 | * we're the last to be unmounted. | |
742 | */ | |
743 | if ((cn = zfs_alloc(zhp->zfs_hdl, | |
744 | sizeof (prop_changenode_t))) == NULL) { | |
745 | zfs_close(temp); | |
746 | changelist_free(clp); | |
747 | return (NULL); | |
748 | } | |
749 | ||
750 | cn->cn_handle = temp; | |
b128c09f BB |
751 | cn->cn_mounted = (clp->cl_gflags & CL_GATHER_MOUNT_ALWAYS) || |
752 | zfs_is_mounted(temp, NULL); | |
34dc7c2f BB |
753 | cn->cn_shared = zfs_is_shared(temp); |
754 | cn->cn_zoned = zfs_prop_get_int(zhp, ZFS_PROP_ZONED); | |
755 | cn->cn_needpost = B_TRUE; | |
756 | ||
0c6d0936 AP |
757 | uu_avl_node_init(cn, &cn->cn_treenode, clp->cl_pool); |
758 | uu_avl_index_t idx; | |
759 | if (uu_avl_find(clp->cl_tree, cn, NULL, &idx) == NULL) { | |
760 | uu_avl_insert(clp->cl_tree, cn, idx); | |
34dc7c2f | 761 | } else { |
0c6d0936 AP |
762 | free(cn); |
763 | zfs_close(temp); | |
34dc7c2f BB |
764 | } |
765 | ||
766 | /* | |
767 | * If the mountpoint property was previously 'legacy', or 'none', | |
768 | * record it as the behavior of changelist_postfix() will be different. | |
769 | */ | |
45d1cae3 | 770 | if ((clp->cl_prop == ZFS_PROP_MOUNTPOINT) && legacy) { |
34dc7c2f BB |
771 | /* |
772 | * do not automatically mount ex-legacy datasets if | |
773 | * we specifically set canmount to noauto | |
774 | */ | |
775 | if (zfs_prop_get_int(zhp, ZFS_PROP_CANMOUNT) != | |
776 | ZFS_CANMOUNT_NOAUTO) | |
777 | clp->cl_waslegacy = B_TRUE; | |
778 | } | |
779 | ||
780 | return (clp); | |
781 | } |