1 // SPDX-License-Identifier: LGPL-2.1
4 * Copyright (C) International Business Machines Corp., 2007
5 * Author(s): Steve French (sfrench@us.ibm.com)
7 * Common Internet FileSystem (CIFS) client
9 * Operations related to support for exporting files via NFSD
14 * See Documentation/filesystems/nfs/exporting.rst
15 * and examples in fs/exportfs
17 * Since cifs is a network file system, an "fsid" must be included for
18 * any nfs exports file entries which refer to cifs paths. In addition
19 * the cifs mount must be mounted with the "serverino" option (ie use stable
20 * server inode numbers instead of locally generated temporary ones).
21 * Although cifs inodes do not use generation numbers (have generation number
22 * of zero) - the inode number alone should be good enough for simple cases
23 * in which users want to export cifs shares with NFS. The decode and encode
24 * could be improved by using a new routine which expects 64 bit inode numbers
25 * instead of the default 32 bit routines in fs/exportfs
30 #include <linux/exportfs.h>
32 #include "cifs_debug.h"
35 #ifdef CONFIG_CIFS_NFSD_EXPORT
36 static struct dentry *cifs_get_parent(struct dentry *dentry)
38 /* BB need to add code here eventually to enable export via NFSD */
39 cifs_dbg(FYI, "get parent for %p\n", dentry);
40 return ERR_PTR(-EACCES);
43 const struct export_operations cifs_export_ops = {
44 .get_parent = cifs_get_parent,
45 /* Following five export operations are unneeded so far and can default:
48 .find_exported_dentry =
53 #endif /* CONFIG_CIFS_NFSD_EXPORT */