| // SPDX-License-Identifier: LGPL-2.1 | |
| /* | |
| * | |
| * Copyright (C) International Business Machines Corp., 2007 | |
| * Author(s): Steve French (sfrench@us.ibm.com) | |
| * | |
| * Common Internet FileSystem (CIFS) client | |
| * | |
| * Operations related to support for exporting files via NFSD | |
| * | |
| */ | |
| /* | |
| * See Documentation/filesystems/nfs/exporting.rst | |
| * and examples in fs/exportfs | |
| * | |
| * Since cifs is a network file system, an "fsid" must be included for | |
| * any nfs exports file entries which refer to cifs paths. In addition | |
| * the cifs mount must be mounted with the "serverino" option (ie use stable | |
| * server inode numbers instead of locally generated temporary ones). | |
| * Although cifs inodes do not use generation numbers (have generation number | |
| * of zero) - the inode number alone should be good enough for simple cases | |
| * in which users want to export cifs shares with NFS. The decode and encode | |
| * could be improved by using a new routine which expects 64 bit inode numbers | |
| * instead of the default 32 bit routines in fs/exportfs | |
| * | |
| */ | |
| #include <linux/fs.h> | |
| #include <linux/exportfs.h> | |
| #include "cifsglob.h" | |
| #include "cifs_debug.h" | |
| #include "cifsfs.h" | |
| #ifdef CONFIG_CIFS_NFSD_EXPORT | |
| static struct dentry *cifs_get_parent(struct dentry *dentry) | |
| { | |
| /* BB need to add code here eventually to enable export via NFSD */ | |
| cifs_dbg(FYI, "get parent for %p\n", dentry); | |
| return ERR_PTR(-EACCES); | |
| } | |
| const struct export_operations cifs_export_ops = { | |
| .encode_fh = generic_encode_ino32_fh, | |
| .get_parent = cifs_get_parent, | |
| /* | |
| * Following export operations are mandatory for NFS export support: | |
| * .fh_to_dentry = | |
| */ | |
| }; | |
| #endif /* CONFIG_CIFS_NFSD_EXPORT */ | |