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
 8 *
 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 */
25
26 /*
27  * See Documentation/filesystems/nfs/Exporting
28  * and examples in fs/exportfs
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  *
40  */
41
42#include <linux/fs.h>
43#include <linux/exportfs.h>
44#include "cifsglob.h"
45#include "cifs_debug.h"
46#include "cifsfs.h"
47
48#ifdef CONFIG_CIFS_NFSD_EXPORT
49static struct dentry *cifs_get_parent(struct dentry *dentry)
50{
51	/* BB need to add code here eventually to enable export via NFSD */
52	cifs_dbg(FYI, "get parent for %p\n", dentry);
53	return ERR_PTR(-EACCES);
54}
55
56const struct export_operations cifs_export_ops = {
57	.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};
65
66#endif /* CONFIG_CIFS_NFSD_EXPORT */
67

 1// SPDX-License-Identifier: LGPL-2.1
 2/*
 3 *   fs/cifs/export.c
 4 *
 5 *   Copyright (C) International Business Machines  Corp., 2007
 6 *   Author(s): Steve French (sfrench@us.ibm.com)
 7 *
 8 *   Common Internet FileSystem (CIFS) client
 9 *
10 *   Operations related to support for exporting files via NFSD
11 *
 
 
 
 
 
 
 
 
 
 
 
 
 
12 */
13
14 /*
15  * See Documentation/filesystems/nfs/exporting.rst
16  * and examples in fs/exportfs
17  *
18  * Since cifs is a network file system, an "fsid" must be included for
19  * any nfs exports file entries which refer to cifs paths.  In addition
20  * the cifs mount must be mounted with the "serverino" option (ie use stable
21  * server inode numbers instead of locally generated temporary ones).
22  * Although cifs inodes do not use generation numbers (have generation number
23  * of zero) - the inode number alone should be good enough for simple cases
24  * in which users want to export cifs shares with NFS. The decode and encode
25  * could be improved by using a new routine which expects 64 bit inode numbers
26  * instead of the default 32 bit routines in fs/exportfs
27  *
28  */
29
30#include <linux/fs.h>
31#include <linux/exportfs.h>
32#include "cifsglob.h"
33#include "cifs_debug.h"
34#include "cifsfs.h"
35
36#ifdef CONFIG_CIFS_NFSD_EXPORT
37static struct dentry *cifs_get_parent(struct dentry *dentry)
38{
39	/* BB need to add code here eventually to enable export via NFSD */
40	cifs_dbg(FYI, "get parent for %p\n", dentry);
41	return ERR_PTR(-EACCES);
42}
43
44const struct export_operations cifs_export_ops = {
45	.get_parent = cifs_get_parent,
46/*	Following five export operations are unneeded so far and can default:
47	.get_dentry =
48	.get_name =
49	.find_exported_dentry =
50	.decode_fh =
51	.encode_fs =  */
52};
53
54#endif /* CONFIG_CIFS_NFSD_EXPORT */
55