tmpfs_rename.c revision 1.2.4.2 1 /* $NetBSD: tmpfs_rename.c,v 1.2.4.2 2012/06/02 11:09:32 mrg Exp $ */
2
3 /*-
4 * Copyright (c) 2012 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Taylor R Campbell.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 /*
33 * tmpfs rename
34 */
35
36 #include <sys/cdefs.h>
37 __KERNEL_RCSID(0, "$NetBSD: tmpfs_rename.c,v 1.2.4.2 2012/06/02 11:09:32 mrg Exp $");
38
39 #include <sys/param.h>
40 #include <sys/errno.h>
41 #include <sys/kauth.h>
42 #include <sys/mount.h>
43 #include <sys/namei.h>
44 #include <sys/stat.h>
45 #include <sys/vnode.h>
46 #include <sys/vnode_if.h>
47
48 #include <miscfs/genfs/genfs.h>
49
50 #include <fs/tmpfs/tmpfs_vnops.h>
51 #include <fs/tmpfs/tmpfs.h>
52
53 /*
54 * Forward declarations
55 */
56
57 static int tmpfs_sane_rename(struct vnode *, struct componentname *,
58 struct vnode *, struct componentname *,
59 kauth_cred_t, bool);
60 static bool tmpfs_rmdired_p(struct vnode *);
61 static int tmpfs_gro_lock_directory(struct mount *, struct vnode *);
62
63 static const struct genfs_rename_ops tmpfs_genfs_rename_ops;
64
65 /*
66 * tmpfs_sane_rename: The hairiest vop, with the saner API.
67 *
68 * Arguments:
69 *
70 * . fdvp (from directory vnode),
71 * . fcnp (from component name),
72 * . tdvp (to directory vnode),
73 * . tcnp (to component name),
74 * . cred (credentials structure), and
75 * . posixly_correct (flag for behaviour if target & source link same file).
76 *
77 * fdvp and tdvp may be the same, and must be referenced and unlocked.
78 */
79 static int
80 tmpfs_sane_rename(
81 struct vnode *fdvp, struct componentname *fcnp,
82 struct vnode *tdvp, struct componentname *tcnp,
83 kauth_cred_t cred, bool posixly_correct)
84 {
85 struct tmpfs_dirent *fdirent, *tdirent;
86
87 return genfs_sane_rename(&tmpfs_genfs_rename_ops,
88 fdvp, fcnp, &fdirent, tdvp, tcnp, &tdirent,
89 cred, posixly_correct);
90 }
91
92 /*
93 * tmpfs_rename: The hairiest vop, with the insanest API. Defer to
94 * genfs_insane_rename immediately.
95 */
96 int
97 tmpfs_rename(void *v)
98 {
99
100 return genfs_insane_rename(v, &tmpfs_sane_rename);
101 }
102
103 /*
104 * tmpfs_gro_directory_empty_p: Return true if the directory vp is
105 * empty. dvp is its parent.
106 *
107 * vp and dvp must be locked and referenced.
108 */
109 static bool
110 tmpfs_gro_directory_empty_p(struct mount *mp, kauth_cred_t cred,
111 struct vnode *vp, struct vnode *dvp)
112 {
113
114 (void)mp;
115 (void)cred;
116 (void)dvp;
117 KASSERT(mp != NULL);
118 KASSERT(vp != NULL);
119 KASSERT(dvp != NULL);
120 KASSERT(vp != dvp);
121 KASSERT(vp->v_mount == mp);
122 KASSERT(dvp->v_mount == mp);
123 KASSERT(VOP_ISLOCKED(vp) == LK_EXCLUSIVE);
124 KASSERT(VOP_ISLOCKED(dvp) == LK_EXCLUSIVE);
125
126 return (VP_TO_TMPFS_NODE(vp)->tn_size == 0);
127 }
128
129 /*
130 * tmpfs_gro_rename_check_possible: Check whether a rename is possible
131 * independent of credentials.
132 */
133 static int
134 tmpfs_gro_rename_check_possible(struct mount *mp,
135 struct vnode *fdvp, struct vnode *fvp,
136 struct vnode *tdvp, struct vnode *tvp)
137 {
138
139 (void)mp;
140 KASSERT(mp != NULL);
141 KASSERT(fdvp != NULL);
142 KASSERT(fvp != NULL);
143 KASSERT(tdvp != NULL);
144 KASSERT(fdvp != fvp);
145 KASSERT(fdvp != tvp);
146 KASSERT(tdvp != fvp);
147 KASSERT(tdvp != tvp);
148 KASSERT(fvp != tvp);
149 KASSERT(fdvp->v_type == VDIR);
150 KASSERT(tdvp->v_type == VDIR);
151 KASSERT(fdvp->v_mount == mp);
152 KASSERT(fvp->v_mount == mp);
153 KASSERT(tdvp->v_mount == mp);
154 KASSERT((tvp == NULL) || (tvp->v_mount == mp));
155 KASSERT(VOP_ISLOCKED(fdvp) == LK_EXCLUSIVE);
156 KASSERT(VOP_ISLOCKED(fvp) == LK_EXCLUSIVE);
157 KASSERT(VOP_ISLOCKED(tdvp) == LK_EXCLUSIVE);
158 KASSERT((tvp == NULL) || (VOP_ISLOCKED(tvp) == LK_EXCLUSIVE));
159
160 return genfs_ufslike_rename_check_possible(
161 VP_TO_TMPFS_NODE(fdvp)->tn_flags, VP_TO_TMPFS_NODE(fvp)->tn_flags,
162 VP_TO_TMPFS_NODE(tdvp)->tn_flags,
163 (tvp? VP_TO_TMPFS_NODE(tvp)->tn_flags : 0), (tvp != NULL),
164 IMMUTABLE, APPEND);
165 }
166
167 /*
168 * tmpfs_gro_rename_check_permitted: Check whether a rename is
169 * permitted given our credentials.
170 */
171 static int
172 tmpfs_gro_rename_check_permitted(struct mount *mp, kauth_cred_t cred,
173 struct vnode *fdvp, struct vnode *fvp,
174 struct vnode *tdvp, struct vnode *tvp)
175 {
176
177 (void)mp;
178 KASSERT(mp != NULL);
179 KASSERT(fdvp != NULL);
180 KASSERT(fvp != NULL);
181 KASSERT(tdvp != NULL);
182 KASSERT(fdvp != fvp);
183 KASSERT(fdvp != tvp);
184 KASSERT(tdvp != fvp);
185 KASSERT(tdvp != tvp);
186 KASSERT(fvp != tvp);
187 KASSERT(fdvp->v_type == VDIR);
188 KASSERT(tdvp->v_type == VDIR);
189 KASSERT(fdvp->v_mount == mp);
190 KASSERT(fvp->v_mount == mp);
191 KASSERT(tdvp->v_mount == mp);
192 KASSERT((tvp == NULL) || (tvp->v_mount == mp));
193 KASSERT(VOP_ISLOCKED(fdvp) == LK_EXCLUSIVE);
194 KASSERT(VOP_ISLOCKED(fvp) == LK_EXCLUSIVE);
195 KASSERT(VOP_ISLOCKED(tdvp) == LK_EXCLUSIVE);
196 KASSERT((tvp == NULL) || (VOP_ISLOCKED(tvp) == LK_EXCLUSIVE));
197
198 return genfs_ufslike_rename_check_permitted(cred,
199 fdvp, VP_TO_TMPFS_NODE(fdvp)->tn_mode,
200 VP_TO_TMPFS_NODE(fdvp)->tn_uid,
201 fvp, VP_TO_TMPFS_NODE(fvp)->tn_uid,
202 tdvp, VP_TO_TMPFS_NODE(tdvp)->tn_mode,
203 VP_TO_TMPFS_NODE(tdvp)->tn_uid,
204 tvp, (tvp? VP_TO_TMPFS_NODE(tvp)->tn_uid : 0));
205 }
206
207 /*
208 * tmpfs_gro_remove_check_possible: Check whether a remove is possible
209 * independent of credentials.
210 */
211 static int
212 tmpfs_gro_remove_check_possible(struct mount *mp,
213 struct vnode *dvp, struct vnode *vp)
214 {
215
216 (void)mp;
217 KASSERT(mp != NULL);
218 KASSERT(dvp != NULL);
219 KASSERT(vp != NULL);
220 KASSERT(dvp != vp);
221 KASSERT(dvp->v_type == VDIR);
222 KASSERT(vp->v_type != VDIR);
223 KASSERT(dvp->v_mount == mp);
224 KASSERT(vp->v_mount == mp);
225 KASSERT(VOP_ISLOCKED(dvp) == LK_EXCLUSIVE);
226 KASSERT(VOP_ISLOCKED(vp) == LK_EXCLUSIVE);
227
228 return genfs_ufslike_remove_check_possible(
229 VP_TO_TMPFS_NODE(dvp)->tn_flags, VP_TO_TMPFS_NODE(vp)->tn_flags,
230 IMMUTABLE, APPEND);
231 }
232
233 /*
234 * tmpfs_gro_remove_check_permitted: Check whether a remove is
235 * permitted given our credentials.
236 */
237 static int
238 tmpfs_gro_remove_check_permitted(struct mount *mp, kauth_cred_t cred,
239 struct vnode *dvp, struct vnode *vp)
240 {
241
242 (void)mp;
243 KASSERT(mp != NULL);
244 KASSERT(dvp != NULL);
245 KASSERT(vp != NULL);
246 KASSERT(dvp != vp);
247 KASSERT(dvp->v_type == VDIR);
248 KASSERT(vp->v_type != VDIR);
249 KASSERT(dvp->v_mount == mp);
250 KASSERT(vp->v_mount == mp);
251 KASSERT(VOP_ISLOCKED(dvp) == LK_EXCLUSIVE);
252 KASSERT(VOP_ISLOCKED(vp) == LK_EXCLUSIVE);
253
254 return genfs_ufslike_remove_check_permitted(cred,
255 dvp, VP_TO_TMPFS_NODE(dvp)->tn_mode, VP_TO_TMPFS_NODE(dvp)->tn_uid,
256 vp, VP_TO_TMPFS_NODE(vp)->tn_uid);
257 }
258
259 /*
260 * tmpfs_gro_rename: Actually perform the rename operation.
261 */
262 static int
263 tmpfs_gro_rename(struct mount *mp, kauth_cred_t cred,
264 struct vnode *fdvp, struct componentname *fcnp,
265 void *fde, struct vnode *fvp,
266 struct vnode *tdvp, struct componentname *tcnp,
267 void *tde, struct vnode *tvp)
268 {
269 struct tmpfs_dirent **fdep = fde;
270 struct tmpfs_dirent **tdep = tde;
271 char *newname;
272
273 (void)cred;
274 KASSERT(mp != NULL);
275 KASSERT(fdvp != NULL);
276 KASSERT(fcnp != NULL);
277 KASSERT(fdep != NULL);
278 KASSERT(fvp != NULL);
279 KASSERT(tdvp != NULL);
280 KASSERT(tcnp != NULL);
281 KASSERT(tdep != NULL);
282 KASSERT(fdep != tdep);
283 KASSERT((*fdep) != (*tdep));
284 KASSERT((*fdep) != NULL);
285 KASSERT((*fdep)->td_node == VP_TO_TMPFS_NODE(fvp));
286 KASSERT((tvp == NULL) || ((*tdep) != NULL));
287 KASSERT((tvp == NULL) || ((*tdep)->td_node == VP_TO_TMPFS_NODE(tvp)));
288 KASSERT(fdvp != fvp);
289 KASSERT(fdvp != tvp);
290 KASSERT(tdvp != fvp);
291 KASSERT(tdvp != tvp);
292 KASSERT(fvp != tvp);
293 KASSERT(fdvp->v_mount == mp);
294 KASSERT(fvp->v_mount == mp);
295 KASSERT(tdvp->v_mount == mp);
296 KASSERT((tvp == NULL) || (tvp->v_mount == mp));
297 KASSERT(VOP_ISLOCKED(fdvp) == LK_EXCLUSIVE);
298 KASSERT(VOP_ISLOCKED(fvp) == LK_EXCLUSIVE);
299 KASSERT(VOP_ISLOCKED(tdvp) == LK_EXCLUSIVE);
300 KASSERT((tvp == NULL) || (VOP_ISLOCKED(tvp) == LK_EXCLUSIVE));
301
302 if (tmpfs_strname_neqlen(fcnp, tcnp)) {
303 newname = tmpfs_strname_alloc(VFS_TO_TMPFS(mp),
304 tcnp->cn_namelen);
305 if (newname == NULL)
306 return ENOSPC;
307 } else {
308 newname = NULL;
309 }
310
311 /*
312 * If we are moving from one directory to another, detach the
313 * source entry and reattach it to the target directory.
314 */
315 if (fdvp != tdvp) {
316 tmpfs_dir_detach(fdvp, *fdep);
317 tmpfs_dir_attach(tdvp, *fdep, VP_TO_TMPFS_NODE(fvp));
318 } else if (tvp == NULL) {
319 /*
320 * We are changing the directory. tmpfs_dir_attach and
321 * tmpfs_dir_detach note the events for us, but for
322 * this case we don't call them, so we must note the
323 * event explicitly.
324 */
325 VN_KNOTE(fdvp, NOTE_WRITE);
326 }
327
328 /*
329 * If we are replacing an existing target entry, delete it.
330 *
331 * XXX What if the target is a directory with whiteout entries?
332 */
333 if (tvp != NULL) {
334 KASSERT((*tdep) != NULL);
335 KASSERT((*tdep)->td_node == VP_TO_TMPFS_NODE(tvp));
336 KASSERT((fvp->v_type == VDIR) == (tvp->v_type == VDIR));
337 if (tvp->v_type == VDIR) {
338 KASSERT(VP_TO_TMPFS_NODE(tvp)->tn_size == 0);
339 KASSERT(VP_TO_TMPFS_NODE(tvp)->tn_links == 2);
340
341 /*
342 * Decrement the extra link count for `.' so
343 * the vnode will be recycled when released.
344 *
345 * XXX Why not just release directory vnodes
346 * when their link count is 1 instead of 0 in
347 * tmpfs_inactive, since `.' is being treated
348 * specially anyway?
349 */
350 VP_TO_TMPFS_NODE(tvp)->tn_links--;
351 }
352 tmpfs_dir_detach(tdvp, *tdep);
353 tmpfs_free_dirent(VFS_TO_TMPFS(mp), *tdep);
354 }
355
356 /*
357 * Update the directory entry's name if necessary, and flag
358 * metadata updates. A memory allocation failure here is not
359 * OK because we've already committed some changes that we
360 * can't back out at this point, hence the early allocation
361 * above.
362 */
363 if (newname != NULL) {
364 KASSERT(tcnp->cn_namelen <= TMPFS_MAXNAMLEN);
365
366 tmpfs_strname_free(VFS_TO_TMPFS(mp), (*fdep)->td_name,
367 (*fdep)->td_namelen);
368 (*fdep)->td_namelen = (uint16_t)tcnp->cn_namelen;
369 (void)memcpy(newname, tcnp->cn_nameptr, tcnp->cn_namelen);
370 (*fdep)->td_name = newname;
371
372 VP_TO_TMPFS_NODE(fvp)->tn_status |= TMPFS_NODE_CHANGED;
373 VP_TO_TMPFS_NODE(tdvp)->tn_status |= TMPFS_NODE_MODIFIED;
374 }
375
376 VN_KNOTE(fvp, NOTE_RENAME);
377
378 #if 0 /* XXX */
379 genfs_rename_cache_purge(fdvp, fvp, tdvp, tvp);
380 #endif
381
382 return 0;
383 }
384
385 /*
386 * tmpfs_gro_remove: Rename an object over another link to itself,
387 * effectively removing just the original link.
388 */
389 static int
390 tmpfs_gro_remove(struct mount *mp, kauth_cred_t cred,
391 struct vnode *dvp, struct componentname *cnp, void *de, struct vnode *vp)
392 {
393 struct tmpfs_dirent **dep = de;
394
395 (void)vp;
396 KASSERT(mp != NULL);
397 KASSERT(dvp != NULL);
398 KASSERT(cnp != NULL);
399 KASSERT(dep != NULL);
400 KASSERT(vp != NULL);
401 KASSERT(dvp != vp);
402 KASSERT(dvp->v_mount == mp);
403 KASSERT(vp->v_mount == mp);
404 KASSERT(dvp->v_type == VDIR);
405 KASSERT(vp->v_type != VDIR);
406 KASSERT(VOP_ISLOCKED(dvp) == LK_EXCLUSIVE);
407 KASSERT(VOP_ISLOCKED(vp) == LK_EXCLUSIVE);
408
409 tmpfs_dir_detach(dvp, *dep);
410 tmpfs_free_dirent(VFS_TO_TMPFS(mp), *dep);
411
412 return 0;
413 }
414
415 /*
416 * tmpfs_gro_lookup: Look up and save the lookup results.
417 */
418 static int
419 tmpfs_gro_lookup(struct mount *mp, struct vnode *dvp,
420 struct componentname *cnp, void *de_ret, struct vnode **vp_ret)
421 {
422 struct tmpfs_dirent *dirent, **dep_ret = de_ret;
423 struct vnode *vp;
424 int error;
425
426 (void)mp;
427 KASSERT(mp != NULL);
428 KASSERT(dvp != NULL);
429 KASSERT(cnp != NULL);
430 KASSERT(dep_ret != NULL);
431 KASSERT(vp_ret != NULL);
432 KASSERT(VOP_ISLOCKED(dvp) == LK_EXCLUSIVE);
433
434 dirent = tmpfs_dir_lookup(VP_TO_TMPFS_NODE(dvp), cnp);
435 if (dirent == NULL)
436 return ENOENT;
437
438 mutex_enter(&dirent->td_node->tn_vlock);
439 error = tmpfs_vnode_get(mp, dirent->td_node, &vp);
440 /* Note: tmpfs_vnode_get always releases dirent->td_node->tn_vlock. */
441 if (error)
442 return error;
443
444 KASSERT(vp != NULL);
445 KASSERT(VOP_ISLOCKED(vp) == LK_EXCLUSIVE);
446
447 /*
448 * tmpfs_vnode_get returns this locked for us, which would be
449 * convenient but for lossage in other file systems. So, for
450 * hysterical raisins, we have to unlock it here. The caller
451 * will lock it again, and we don't rely on any interesting
452 * invariants in the interim, beyond that it won't vanish from
453 * under us, which it won't because it's referenced.
454 *
455 * XXX Once namei is fixed, we can change the genfs_rename
456 * protocol so that this unlock is not necessary.
457 */
458 VOP_UNLOCK(vp);
459
460 *dep_ret = dirent;
461 *vp_ret = vp;
462 return 0;
463 }
464
465 /*
466 * tmpfs_rmdired_p: Check whether the directory vp has been rmdired.
467 *
468 * vp must be locked and referenced.
469 */
470 static bool
471 tmpfs_rmdired_p(struct vnode *vp)
472 {
473
474 KASSERT(vp != NULL);
475 KASSERT(VOP_ISLOCKED(vp) == LK_EXCLUSIVE);
476 KASSERT(vp->v_type == VDIR);
477
478 return (VP_TO_TMPFS_NODE(vp)->tn_spec.tn_dir.tn_parent == NULL);
479 }
480
481 /*
482 * tmpfs_gro_genealogy: Analyze the genealogy of the source and target
483 * directories.
484 */
485 static int
486 tmpfs_gro_genealogy(struct mount *mp, kauth_cred_t cred,
487 struct vnode *fdvp, struct vnode *tdvp,
488 struct vnode **intermediate_node_ret)
489 {
490 struct vnode *vp;
491 struct tmpfs_node *dnode;
492 int error;
493
494 (void)cred;
495 KASSERT(mp != NULL);
496 KASSERT(fdvp != NULL);
497 KASSERT(tdvp != NULL);
498 KASSERT(fdvp != tdvp);
499 KASSERT(intermediate_node_ret != NULL);
500 KASSERT(fdvp->v_mount == mp);
501 KASSERT(tdvp->v_mount == mp);
502 KASSERT(fdvp->v_type == VDIR);
503 KASSERT(tdvp->v_type == VDIR);
504
505 /*
506 * We need to provisionally lock tdvp to keep rmdir from
507 * deleting it -- or any ancestor -- at an inopportune moment.
508 */
509 error = tmpfs_gro_lock_directory(mp, tdvp);
510 if (error)
511 return error;
512
513 vp = tdvp;
514 vref(vp);
515
516 for (;;) {
517 KASSERT(vp != NULL);
518 KASSERT(VOP_ISLOCKED(vp) == LK_EXCLUSIVE);
519 KASSERT(vp->v_mount == mp);
520 KASSERT(vp->v_type == VDIR);
521 KASSERT(!tmpfs_rmdired_p(vp));
522
523 dnode = VP_TO_TMPFS_NODE(vp)->tn_spec.tn_dir.tn_parent;
524
525 /*
526 * If dnode is null then vp has been rmdir'd, which is
527 * not supposed to happen because we have it locked.
528 */
529 KASSERT(dnode != NULL);
530
531 /* Did we hit the root without finding fdvp? */
532 if (dnode == VP_TO_TMPFS_NODE(vp)) {
533 vput(vp);
534 *intermediate_node_ret = NULL;
535 return 0;
536 }
537
538 /* Did we find that fdvp is an ancestor of tdvp? */
539 if (dnode == VP_TO_TMPFS_NODE(fdvp)) {
540 KASSERT(dnode->tn_vnode == fdvp);
541 /* Unlock vp, but keep it referenced. */
542 VOP_UNLOCK(vp);
543 *intermediate_node_ret = vp;
544 return 0;
545 }
546
547 /* Neither -- keep ascending the family tree. */
548 mutex_enter(&dnode->tn_vlock);
549 vput(vp);
550 vp = NULL; /* Just in case, for the kassert above... */
551 error = tmpfs_vnode_get(mp, dnode, &vp);
552 if (error)
553 return error;
554 }
555 }
556
557 /*
558 * tmpfs_gro_lock_directory: Lock the directory vp, but fail if it has
559 * been rmdir'd.
560 */
561 static int
562 tmpfs_gro_lock_directory(struct mount *mp, struct vnode *vp)
563 {
564
565 (void)mp;
566 KASSERT(mp != NULL);
567 KASSERT(vp != NULL);
568 KASSERT(vp->v_mount == mp);
569
570 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
571
572 if (tmpfs_rmdired_p(vp)) {
573 VOP_UNLOCK(vp);
574 return ENOENT;
575 }
576
577 return 0;
578 }
579
580 static const struct genfs_rename_ops tmpfs_genfs_rename_ops = {
581 .gro_directory_empty_p = tmpfs_gro_directory_empty_p,
582 .gro_rename_check_possible = tmpfs_gro_rename_check_possible,
583 .gro_rename_check_permitted = tmpfs_gro_rename_check_permitted,
584 .gro_remove_check_possible = tmpfs_gro_remove_check_possible,
585 .gro_remove_check_permitted = tmpfs_gro_remove_check_permitted,
586 .gro_rename = tmpfs_gro_rename,
587 .gro_remove = tmpfs_gro_remove,
588 .gro_lookup = tmpfs_gro_lookup,
589 .gro_genealogy = tmpfs_gro_genealogy,
590 .gro_lock_directory = tmpfs_gro_lock_directory,
591 };
592