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gerrit-public.fairphone.software / kernel / msm-4.9 / 70b315b0dd3879cb3ab8aadffb14f10b2d19b9c3 / . / fs / cifs / export.c
blob: c21d3d09d0afea5a056cb7c420eb85b8d226b458 [file] [log] [blame]
Steve French1ae1bc42007-02-27 05:16:30 +0000[diff] [blame]1/*
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 +0000[diff] [blame]8 *
Steve French1ae1bc42007-02-27 05:16:30 +0000[diff] [blame]9 * 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 +0000[diff] [blame]25
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000[diff] [blame]26 /*
Steve French1ae1bc42007-02-27 05:16:30 +0000[diff] [blame]27 * See Documentation/filesystems/Exporting
28 * and examples in fs/exportfs
Steve French7521a3c2007-07-11 18:30:34 +0000[diff] [blame]29 *
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 +0000[diff] [blame]40 */
41
42#include <linux/fs.h>
Steve French70b315b2007-07-19 00:32:25 +0000[diff] [blame^]43#include <linux/exportfs.h>
Steve French7521a3c2007-07-11 18:30:34 +0000[diff] [blame]44#include "cifsglob.h"
45#include "cifs_debug.h"
46
Steve French50c2f752007-07-13 00:33:32 +0000[diff] [blame]47
Steve French1ae1bc42007-02-27 05:16:30 +0000[diff] [blame]48#ifdef CONFIG_CIFS_EXPERIMENTAL
Steve French50c2f752007-07-13 00:33:32 +0000[diff] [blame]49
Steve French1ae1bc42007-02-27 05:16:30 +0000[diff] [blame]50static struct dentry *cifs_get_parent(struct dentry *dentry)
51{
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000[diff] [blame]52 /* BB need to add code here eventually to enable export via NFSD */
Steve French7521a3c2007-07-11 18:30:34 +0000[diff] [blame]53 cFYI(1, ("get parent for %p", dentry));
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000[diff] [blame]54 return ERR_PTR(-EACCES);
Steve French1ae1bc42007-02-27 05:16:30 +0000[diff] [blame]55}
Steve French50c2f752007-07-13 00:33:32 +0000[diff] [blame]56
Steve French1ae1bc42007-02-27 05:16:30 +0000[diff] [blame]57struct export_operations cifs_export_ops = {
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000[diff] [blame]58 .get_parent = cifs_get_parent,
59/* Following five export operations are unneeded so far and can default:
60 .get_dentry =
61 .get_name =
62 .find_exported_dentry =
63 .decode_fh =
64 .encode_fs = */
65};
Steve French50c2f752007-07-13 00:33:32 +0000[diff] [blame]66
Steve French1ae1bc42007-02-27 05:16:30 +0000[diff] [blame]67#endif /* EXPERIMENTAL */
Steve French50c2f752007-07-13 00:33:32 +0000[diff] [blame]68