export.c

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/*
 *   fs/cifs/export.c
 *
 *   Copyright (C) International Business Machines  Corp., 2007
 *   Author(s): Steve French ([email protected])
 *
 *   Common Internet FileSystem (CIFS) client
 *
 *   Operations related to support for exporting files via NFSD
 *
 *   This library is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU Lesser General Public License as published
 *   by the Free Software Foundation; either version 2.1 of the License, or
 *   (at your option) any later version.
 *
 *   This library is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
 *   the GNU Lesser General Public License for more details.
 *
 *   You should have received a copy of the GNU Lesser General Public License
 *   along with this library; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */

 /*
  * See Documentation/filesystems/nfs/Exporting
  * 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 */
    cFYI(1, "get parent for %p", dentry);
    return ERR_PTR(-EACCES);
}

const struct export_operations cifs_export_ops = {
    .get_parent = cifs_get_parent,
/*  Following five export operations are unneeded so far and can default:
    .get_dentry =
    .get_name =
    .find_exported_dentry =
    .decode_fh =
    .encode_fs =  */
};

#endif /* CONFIG_CIFS_NFSD_EXPORT */