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Steve French1ae1bc42007-02-27 05:16:30 +00001/*
2 * fs/cifs/export.c
3 *
4 * Copyright (C) International Business Machines Corp., 2007
5 * Author(s): Steve French (sfrench@us.ibm.com)
6 *
7 * Common Internet FileSystem (CIFS) client
Steve Frenchfb8c4b12007-07-10 01:16:18 +00008 *
Steve French1ae1bc42007-02-27 05:16:30 +00009 * Operations related to support for exporting files via NFSD
10 *
11 * This library is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU Lesser General Public License as published
13 * by the Free Software Foundation; either version 2.1 of the License, or
14 * (at your option) any later version.
15 *
16 * This library is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
19 * the GNU Lesser General Public License for more details.
20 *
21 * You should have received a copy of the GNU Lesser General Public License
22 * along with this library; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 */
Steve French50c2f752007-07-13 00:33:32 +000025
Steve Frenchfb8c4b12007-07-10 01:16:18 +000026 /*
J. Bruce Fieldsdc7a0812009-10-27 14:41:35 -040027 * See Documentation/filesystems/nfs/Exporting
Steve French1ae1bc42007-02-27 05:16:30 +000028 * and examples in fs/exportfs
Steve French7521a3c2007-07-11 18:30:34 +000029 *
30 * Since cifs is a network file system, an "fsid" must be included for
31 * any nfs exports file entries which refer to cifs paths. In addition
32 * the cifs mount must be mounted with the "serverino" option (ie use stable
33 * server inode numbers instead of locally generated temporary ones).
34 * Although cifs inodes do not use generation numbers (have generation number
35 * of zero) - the inode number alone should be good enough for simple cases
36 * in which users want to export cifs shares with NFS. The decode and encode
37 * could be improved by using a new routine which expects 64 bit inode numbers
38 * instead of the default 32 bit routines in fs/exportfs
39 *
Steve French1ae1bc42007-02-27 05:16:30 +000040 */
41
42#include <linux/fs.h>
Steve French70b315b2007-07-19 00:32:25 +000043#include <linux/exportfs.h>
Steve French7521a3c2007-07-11 18:30:34 +000044#include "cifsglob.h"
45#include "cifs_debug.h"
Steve French297647c2007-10-12 04:11:59 +000046#include "cifsfs.h"
Steve French7521a3c2007-07-11 18:30:34 +000047
Paul Bollef3a6a602011-10-12 14:14:04 +020048#ifdef CONFIG_CIFS_NFSD_EXPORT
Steve French1ae1bc42007-02-27 05:16:30 +000049static struct dentry *cifs_get_parent(struct dentry *dentry)
50{
Steve Frenchfb8c4b12007-07-10 01:16:18 +000051 /* BB need to add code here eventually to enable export via NFSD */
Joe Perchesb6b38f72010-04-21 03:50:45 +000052 cFYI(1, "get parent for %p", dentry);
Steve Frenchfb8c4b12007-07-10 01:16:18 +000053 return ERR_PTR(-EACCES);
Steve French1ae1bc42007-02-27 05:16:30 +000054}
Steve French50c2f752007-07-13 00:33:32 +000055
Christoph Hellwig39655162007-10-21 16:42:17 -070056const struct export_operations cifs_export_ops = {
Steve Frenchfb8c4b12007-07-10 01:16:18 +000057 .get_parent = cifs_get_parent,
58/* Following five export operations are unneeded so far and can default:
59 .get_dentry =
60 .get_name =
61 .find_exported_dentry =
62 .decode_fh =
63 .encode_fs = */
64};
Steve French50c2f752007-07-13 00:33:32 +000065
Paul Bollef3a6a602011-10-12 14:14:04 +020066#endif /* CONFIG_CIFS_NFSD_EXPORT */
Steve French50c2f752007-07-13 00:33:32 +000067