2 * linux/fs/nfs/nfs3proc.c
4 * Client-side NFSv3 procedures stubs.
6 * Copyright (C) 1997, Olaf Kirch
10 #include <linux/utsname.h>
11 #include <linux/errno.h>
12 #include <linux/string.h>
13 #include <linux/sunrpc/clnt.h>
14 #include <linux/nfs.h>
15 #include <linux/nfs3.h>
16 #include <linux/nfs_fs.h>
17 #include <linux/nfs_page.h>
18 #include <linux/lockd/bind.h>
19 #include <linux/nfs_mount.h>
24 #define NFSDBG_FACILITY NFSDBG_PROC
26 /* A wrapper to handle the EJUKEBOX error message */
28 nfs3_rpc_wrapper(struct rpc_clnt *clnt, struct rpc_message *msg, int flags)
32 rpc_clnt_sigmask(clnt, &oldset);
34 res = rpc_call_sync(clnt, msg, flags);
37 schedule_timeout_interruptible(NFS_JUKEBOX_RETRY_TIME);
39 } while (!signalled());
40 rpc_clnt_sigunmask(clnt, &oldset);
44 #define rpc_call_sync(clnt, msg, flags) nfs3_rpc_wrapper(clnt, msg, flags)
47 nfs3_async_handle_jukebox(struct rpc_task *task, struct inode *inode)
49 if (task->tk_status != -EJUKEBOX)
51 nfs_inc_stats(inode, NFSIOS_DELAY);
53 rpc_restart_call(task);
54 rpc_delay(task, NFS_JUKEBOX_RETRY_TIME);
59 do_proc_get_root(struct rpc_clnt *client, struct nfs_fh *fhandle,
60 struct nfs_fsinfo *info)
62 struct rpc_message msg = {
63 .rpc_proc = &nfs3_procedures[NFS3PROC_FSINFO],
69 dprintk("%s: call fsinfo\n", __FUNCTION__);
70 nfs_fattr_init(info->fattr);
71 status = rpc_call_sync(client, &msg, 0);
72 dprintk("%s: reply fsinfo: %d\n", __FUNCTION__, status);
73 if (!(info->fattr->valid & NFS_ATTR_FATTR)) {
74 msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR];
75 msg.rpc_resp = info->fattr;
76 status = rpc_call_sync(client, &msg, 0);
77 dprintk("%s: reply getattr: %d\n", __FUNCTION__, status);
83 * Bare-bones access to getattr: this is for nfs_get_root/nfs_get_sb
86 nfs3_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
87 struct nfs_fsinfo *info)
91 status = do_proc_get_root(server->client, fhandle, info);
92 if (status && server->nfs_client->cl_rpcclient != server->client)
93 status = do_proc_get_root(server->nfs_client->cl_rpcclient, fhandle, info);
98 * One function for each procedure in the NFS protocol.
101 nfs3_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
102 struct nfs_fattr *fattr)
104 struct rpc_message msg = {
105 .rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR],
111 dprintk("NFS call getattr\n");
112 nfs_fattr_init(fattr);
113 status = rpc_call_sync(server->client, &msg, 0);
114 dprintk("NFS reply getattr: %d\n", status);
119 nfs3_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
122 struct inode *inode = dentry->d_inode;
123 struct nfs3_sattrargs arg = {
127 struct rpc_message msg = {
128 .rpc_proc = &nfs3_procedures[NFS3PROC_SETATTR],
134 dprintk("NFS call setattr\n");
135 nfs_fattr_init(fattr);
136 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
138 nfs_setattr_update_inode(inode, sattr);
139 dprintk("NFS reply setattr: %d\n", status);
144 nfs3_proc_lookup(struct inode *dir, struct qstr *name,
145 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
147 struct nfs_fattr dir_attr;
148 struct nfs3_diropargs arg = {
153 struct nfs3_diropres res = {
154 .dir_attr = &dir_attr,
158 struct rpc_message msg = {
159 .rpc_proc = &nfs3_procedures[NFS3PROC_LOOKUP],
165 dprintk("NFS call lookup %s\n", name->name);
166 nfs_fattr_init(&dir_attr);
167 nfs_fattr_init(fattr);
168 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
169 if (status >= 0 && !(fattr->valid & NFS_ATTR_FATTR)) {
170 msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR];
171 msg.rpc_argp = fhandle;
172 msg.rpc_resp = fattr;
173 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
175 dprintk("NFS reply lookup: %d\n", status);
177 status = nfs_refresh_inode(dir, &dir_attr);
181 static int nfs3_proc_access(struct inode *inode, struct nfs_access_entry *entry)
183 struct nfs_fattr fattr;
184 struct nfs3_accessargs arg = {
187 struct nfs3_accessres res = {
190 struct rpc_message msg = {
191 .rpc_proc = &nfs3_procedures[NFS3PROC_ACCESS],
194 .rpc_cred = entry->cred,
196 int mode = entry->mask;
199 dprintk("NFS call access\n");
202 arg.access |= NFS3_ACCESS_READ;
203 if (S_ISDIR(inode->i_mode)) {
204 if (mode & MAY_WRITE)
205 arg.access |= NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND | NFS3_ACCESS_DELETE;
207 arg.access |= NFS3_ACCESS_LOOKUP;
209 if (mode & MAY_WRITE)
210 arg.access |= NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND;
212 arg.access |= NFS3_ACCESS_EXECUTE;
214 nfs_fattr_init(&fattr);
215 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
216 nfs_refresh_inode(inode, &fattr);
219 if (res.access & NFS3_ACCESS_READ)
220 entry->mask |= MAY_READ;
221 if (res.access & (NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND | NFS3_ACCESS_DELETE))
222 entry->mask |= MAY_WRITE;
223 if (res.access & (NFS3_ACCESS_LOOKUP|NFS3_ACCESS_EXECUTE))
224 entry->mask |= MAY_EXEC;
226 dprintk("NFS reply access: %d\n", status);
230 static int nfs3_proc_readlink(struct inode *inode, struct page *page,
231 unsigned int pgbase, unsigned int pglen)
233 struct nfs_fattr fattr;
234 struct nfs3_readlinkargs args = {
240 struct rpc_message msg = {
241 .rpc_proc = &nfs3_procedures[NFS3PROC_READLINK],
247 dprintk("NFS call readlink\n");
248 nfs_fattr_init(&fattr);
249 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
250 nfs_refresh_inode(inode, &fattr);
251 dprintk("NFS reply readlink: %d\n", status);
256 * Create a regular file.
257 * For now, we don't implement O_EXCL.
260 nfs3_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
261 int flags, struct nameidata *nd)
263 struct nfs_fh fhandle;
264 struct nfs_fattr fattr;
265 struct nfs_fattr dir_attr;
266 struct nfs3_createargs arg = {
268 .name = dentry->d_name.name,
269 .len = dentry->d_name.len,
272 struct nfs3_diropres res = {
273 .dir_attr = &dir_attr,
277 struct rpc_message msg = {
278 .rpc_proc = &nfs3_procedures[NFS3PROC_CREATE],
282 mode_t mode = sattr->ia_mode;
285 dprintk("NFS call create %s\n", dentry->d_name.name);
286 arg.createmode = NFS3_CREATE_UNCHECKED;
287 if (flags & O_EXCL) {
288 arg.createmode = NFS3_CREATE_EXCLUSIVE;
289 arg.verifier[0] = jiffies;
290 arg.verifier[1] = current->pid;
293 sattr->ia_mode &= ~current->fs->umask;
296 nfs_fattr_init(&dir_attr);
297 nfs_fattr_init(&fattr);
298 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
299 nfs_refresh_inode(dir, &dir_attr);
301 /* If the server doesn't support the exclusive creation semantics,
302 * try again with simple 'guarded' mode. */
303 if (status == -ENOTSUPP) {
304 switch (arg.createmode) {
305 case NFS3_CREATE_EXCLUSIVE:
306 arg.createmode = NFS3_CREATE_GUARDED;
309 case NFS3_CREATE_GUARDED:
310 arg.createmode = NFS3_CREATE_UNCHECKED;
313 case NFS3_CREATE_UNCHECKED:
320 status = nfs_instantiate(dentry, &fhandle, &fattr);
324 /* When we created the file with exclusive semantics, make
325 * sure we set the attributes afterwards. */
326 if (arg.createmode == NFS3_CREATE_EXCLUSIVE) {
327 dprintk("NFS call setattr (post-create)\n");
329 if (!(sattr->ia_valid & ATTR_ATIME_SET))
330 sattr->ia_valid |= ATTR_ATIME;
331 if (!(sattr->ia_valid & ATTR_MTIME_SET))
332 sattr->ia_valid |= ATTR_MTIME;
334 /* Note: we could use a guarded setattr here, but I'm
335 * not sure this buys us anything (and I'd have
336 * to revamp the NFSv3 XDR code) */
337 status = nfs3_proc_setattr(dentry, &fattr, sattr);
338 nfs_post_op_update_inode(dentry->d_inode, &fattr);
339 dprintk("NFS reply setattr (post-create): %d\n", status);
343 status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode);
345 dprintk("NFS reply create: %d\n", status);
350 nfs3_proc_remove(struct inode *dir, struct qstr *name)
352 struct nfs_removeargs arg = {
354 .name.len = name->len,
355 .name.name = name->name,
357 struct nfs_removeres res;
358 struct rpc_message msg = {
359 .rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE],
365 dprintk("NFS call remove %s\n", name->name);
366 nfs_fattr_init(&res.dir_attr);
367 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
368 nfs_post_op_update_inode(dir, &res.dir_attr);
369 dprintk("NFS reply remove: %d\n", status);
374 nfs3_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
376 msg->rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE];
380 nfs3_proc_unlink_done(struct rpc_task *task, struct inode *dir)
382 struct nfs_removeres *res;
383 if (nfs3_async_handle_jukebox(task, dir))
385 res = task->tk_msg.rpc_resp;
386 nfs_post_op_update_inode(dir, &res->dir_attr);
391 nfs3_proc_rename(struct inode *old_dir, struct qstr *old_name,
392 struct inode *new_dir, struct qstr *new_name)
394 struct nfs_fattr old_dir_attr, new_dir_attr;
395 struct nfs3_renameargs arg = {
396 .fromfh = NFS_FH(old_dir),
397 .fromname = old_name->name,
398 .fromlen = old_name->len,
399 .tofh = NFS_FH(new_dir),
400 .toname = new_name->name,
401 .tolen = new_name->len
403 struct nfs3_renameres res = {
404 .fromattr = &old_dir_attr,
405 .toattr = &new_dir_attr
407 struct rpc_message msg = {
408 .rpc_proc = &nfs3_procedures[NFS3PROC_RENAME],
414 dprintk("NFS call rename %s -> %s\n", old_name->name, new_name->name);
415 nfs_fattr_init(&old_dir_attr);
416 nfs_fattr_init(&new_dir_attr);
417 status = rpc_call_sync(NFS_CLIENT(old_dir), &msg, 0);
418 nfs_post_op_update_inode(old_dir, &old_dir_attr);
419 nfs_post_op_update_inode(new_dir, &new_dir_attr);
420 dprintk("NFS reply rename: %d\n", status);
425 nfs3_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
427 struct nfs_fattr dir_attr, fattr;
428 struct nfs3_linkargs arg = {
429 .fromfh = NFS_FH(inode),
431 .toname = name->name,
434 struct nfs3_linkres res = {
435 .dir_attr = &dir_attr,
438 struct rpc_message msg = {
439 .rpc_proc = &nfs3_procedures[NFS3PROC_LINK],
445 dprintk("NFS call link %s\n", name->name);
446 nfs_fattr_init(&dir_attr);
447 nfs_fattr_init(&fattr);
448 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
449 nfs_post_op_update_inode(dir, &dir_attr);
450 nfs_post_op_update_inode(inode, &fattr);
451 dprintk("NFS reply link: %d\n", status);
456 nfs3_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page,
457 unsigned int len, struct iattr *sattr)
459 struct nfs_fh fhandle;
460 struct nfs_fattr fattr, dir_attr;
461 struct nfs3_symlinkargs arg = {
462 .fromfh = NFS_FH(dir),
463 .fromname = dentry->d_name.name,
464 .fromlen = dentry->d_name.len,
469 struct nfs3_diropres res = {
470 .dir_attr = &dir_attr,
474 struct rpc_message msg = {
475 .rpc_proc = &nfs3_procedures[NFS3PROC_SYMLINK],
481 if (len > NFS3_MAXPATHLEN)
482 return -ENAMETOOLONG;
484 dprintk("NFS call symlink %s\n", dentry->d_name.name);
486 nfs_fattr_init(&dir_attr);
487 nfs_fattr_init(&fattr);
488 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
489 nfs_post_op_update_inode(dir, &dir_attr);
492 status = nfs_instantiate(dentry, &fhandle, &fattr);
494 dprintk("NFS reply symlink: %d\n", status);
499 nfs3_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr)
501 struct nfs_fh fhandle;
502 struct nfs_fattr fattr, dir_attr;
503 struct nfs3_mkdirargs arg = {
505 .name = dentry->d_name.name,
506 .len = dentry->d_name.len,
509 struct nfs3_diropres res = {
510 .dir_attr = &dir_attr,
514 struct rpc_message msg = {
515 .rpc_proc = &nfs3_procedures[NFS3PROC_MKDIR],
519 int mode = sattr->ia_mode;
522 dprintk("NFS call mkdir %s\n", dentry->d_name.name);
524 sattr->ia_mode &= ~current->fs->umask;
526 nfs_fattr_init(&dir_attr);
527 nfs_fattr_init(&fattr);
528 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
529 nfs_post_op_update_inode(dir, &dir_attr);
532 status = nfs_instantiate(dentry, &fhandle, &fattr);
535 status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode);
537 dprintk("NFS reply mkdir: %d\n", status);
542 nfs3_proc_rmdir(struct inode *dir, struct qstr *name)
544 struct nfs_fattr dir_attr;
545 struct nfs3_diropargs arg = {
550 struct rpc_message msg = {
551 .rpc_proc = &nfs3_procedures[NFS3PROC_RMDIR],
553 .rpc_resp = &dir_attr,
557 dprintk("NFS call rmdir %s\n", name->name);
558 nfs_fattr_init(&dir_attr);
559 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
560 nfs_post_op_update_inode(dir, &dir_attr);
561 dprintk("NFS reply rmdir: %d\n", status);
566 * The READDIR implementation is somewhat hackish - we pass the user buffer
567 * to the encode function, which installs it in the receive iovec.
568 * The decode function itself doesn't perform any decoding, it just makes
569 * sure the reply is syntactically correct.
571 * Also note that this implementation handles both plain readdir and
575 nfs3_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
576 u64 cookie, struct page *page, unsigned int count, int plus)
578 struct inode *dir = dentry->d_inode;
579 struct nfs_fattr dir_attr;
580 __be32 *verf = NFS_COOKIEVERF(dir);
581 struct nfs3_readdirargs arg = {
584 .verf = {verf[0], verf[1]},
589 struct nfs3_readdirres res = {
590 .dir_attr = &dir_attr,
594 struct rpc_message msg = {
595 .rpc_proc = &nfs3_procedures[NFS3PROC_READDIR],
603 msg.rpc_proc = &nfs3_procedures[NFS3PROC_READDIRPLUS];
605 dprintk("NFS call readdir%s %d\n",
606 plus? "plus" : "", (unsigned int) cookie);
608 nfs_fattr_init(&dir_attr);
609 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
611 nfs_invalidate_atime(dir);
613 nfs_refresh_inode(dir, &dir_attr);
614 dprintk("NFS reply readdir: %d\n", status);
619 nfs3_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
623 struct nfs_fattr fattr, dir_attr;
624 struct nfs3_mknodargs arg = {
626 .name = dentry->d_name.name,
627 .len = dentry->d_name.len,
631 struct nfs3_diropres res = {
632 .dir_attr = &dir_attr,
636 struct rpc_message msg = {
637 .rpc_proc = &nfs3_procedures[NFS3PROC_MKNOD],
641 mode_t mode = sattr->ia_mode;
644 switch (sattr->ia_mode & S_IFMT) {
645 case S_IFBLK: arg.type = NF3BLK; break;
646 case S_IFCHR: arg.type = NF3CHR; break;
647 case S_IFIFO: arg.type = NF3FIFO; break;
648 case S_IFSOCK: arg.type = NF3SOCK; break;
649 default: return -EINVAL;
652 dprintk("NFS call mknod %s %u:%u\n", dentry->d_name.name,
653 MAJOR(rdev), MINOR(rdev));
655 sattr->ia_mode &= ~current->fs->umask;
657 nfs_fattr_init(&dir_attr);
658 nfs_fattr_init(&fattr);
659 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
660 nfs_post_op_update_inode(dir, &dir_attr);
663 status = nfs_instantiate(dentry, &fh, &fattr);
666 status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode);
668 dprintk("NFS reply mknod: %d\n", status);
673 nfs3_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
674 struct nfs_fsstat *stat)
676 struct rpc_message msg = {
677 .rpc_proc = &nfs3_procedures[NFS3PROC_FSSTAT],
683 dprintk("NFS call fsstat\n");
684 nfs_fattr_init(stat->fattr);
685 status = rpc_call_sync(server->client, &msg, 0);
686 dprintk("NFS reply statfs: %d\n", status);
691 nfs3_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
692 struct nfs_fsinfo *info)
694 struct rpc_message msg = {
695 .rpc_proc = &nfs3_procedures[NFS3PROC_FSINFO],
701 dprintk("NFS call fsinfo\n");
702 nfs_fattr_init(info->fattr);
703 status = rpc_call_sync(server->nfs_client->cl_rpcclient, &msg, 0);
704 dprintk("NFS reply fsinfo: %d\n", status);
709 nfs3_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
710 struct nfs_pathconf *info)
712 struct rpc_message msg = {
713 .rpc_proc = &nfs3_procedures[NFS3PROC_PATHCONF],
719 dprintk("NFS call pathconf\n");
720 nfs_fattr_init(info->fattr);
721 status = rpc_call_sync(server->client, &msg, 0);
722 dprintk("NFS reply pathconf: %d\n", status);
726 static int nfs3_read_done(struct rpc_task *task, struct nfs_read_data *data)
728 if (nfs3_async_handle_jukebox(task, data->inode))
731 nfs_invalidate_atime(data->inode);
732 nfs_refresh_inode(data->inode, &data->fattr);
736 static void nfs3_proc_read_setup(struct nfs_read_data *data)
738 struct rpc_message msg = {
739 .rpc_proc = &nfs3_procedures[NFS3PROC_READ],
740 .rpc_argp = &data->args,
741 .rpc_resp = &data->res,
742 .rpc_cred = data->cred,
745 rpc_call_setup(&data->task, &msg, 0);
748 static int nfs3_write_done(struct rpc_task *task, struct nfs_write_data *data)
750 if (nfs3_async_handle_jukebox(task, data->inode))
752 if (task->tk_status >= 0)
753 nfs_post_op_update_inode(data->inode, data->res.fattr);
757 static void nfs3_proc_write_setup(struct nfs_write_data *data, int how)
759 struct rpc_message msg = {
760 .rpc_proc = &nfs3_procedures[NFS3PROC_WRITE],
761 .rpc_argp = &data->args,
762 .rpc_resp = &data->res,
763 .rpc_cred = data->cred,
766 data->args.stable = NFS_UNSTABLE;
767 if (how & FLUSH_STABLE) {
768 data->args.stable = NFS_FILE_SYNC;
769 if (NFS_I(data->inode)->ncommit)
770 data->args.stable = NFS_DATA_SYNC;
773 /* Finalize the task. */
774 rpc_call_setup(&data->task, &msg, 0);
777 static int nfs3_commit_done(struct rpc_task *task, struct nfs_write_data *data)
779 if (nfs3_async_handle_jukebox(task, data->inode))
781 if (task->tk_status >= 0)
782 nfs_post_op_update_inode(data->inode, data->res.fattr);
786 static void nfs3_proc_commit_setup(struct nfs_write_data *data, int how)
788 struct rpc_message msg = {
789 .rpc_proc = &nfs3_procedures[NFS3PROC_COMMIT],
790 .rpc_argp = &data->args,
791 .rpc_resp = &data->res,
792 .rpc_cred = data->cred,
795 rpc_call_setup(&data->task, &msg, 0);
799 nfs3_proc_lock(struct file *filp, int cmd, struct file_lock *fl)
801 return nlmclnt_proc(filp->f_path.dentry->d_inode, cmd, fl);
804 const struct nfs_rpc_ops nfs_v3_clientops = {
805 .version = 3, /* protocol version */
806 .dentry_ops = &nfs_dentry_operations,
807 .dir_inode_ops = &nfs3_dir_inode_operations,
808 .file_inode_ops = &nfs3_file_inode_operations,
809 .getroot = nfs3_proc_get_root,
810 .getattr = nfs3_proc_getattr,
811 .setattr = nfs3_proc_setattr,
812 .lookup = nfs3_proc_lookup,
813 .access = nfs3_proc_access,
814 .readlink = nfs3_proc_readlink,
815 .create = nfs3_proc_create,
816 .remove = nfs3_proc_remove,
817 .unlink_setup = nfs3_proc_unlink_setup,
818 .unlink_done = nfs3_proc_unlink_done,
819 .rename = nfs3_proc_rename,
820 .link = nfs3_proc_link,
821 .symlink = nfs3_proc_symlink,
822 .mkdir = nfs3_proc_mkdir,
823 .rmdir = nfs3_proc_rmdir,
824 .readdir = nfs3_proc_readdir,
825 .mknod = nfs3_proc_mknod,
826 .statfs = nfs3_proc_statfs,
827 .fsinfo = nfs3_proc_fsinfo,
828 .pathconf = nfs3_proc_pathconf,
829 .decode_dirent = nfs3_decode_dirent,
830 .read_setup = nfs3_proc_read_setup,
831 .read_done = nfs3_read_done,
832 .write_setup = nfs3_proc_write_setup,
833 .write_done = nfs3_write_done,
834 .commit_setup = nfs3_proc_commit_setup,
835 .commit_done = nfs3_commit_done,
836 .file_open = nfs_open,
837 .file_release = nfs_release,
838 .lock = nfs3_proc_lock,
839 .clear_acl_cache = nfs3_forget_cached_acls,