xen: introduce the header file for the Xen 9pfs transport protocol

/*

 * 9pfs.h -- Xen 9PFS transport

 *

 * Permission is hereby granted, free of charge, to any person obtaining a copy

 * of this software and associated documentation files (the "Software"), to

 * deal in the Software without restriction, including without limitation the

 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or

 * sell copies of the Software, and to permit persons to whom the Software is

 * furnished to do so, subject to the following conditions:

 *

 * The above copyright notice and this permission notice shall be included in

 * all copies or substantial portions of the Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING

 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER

 * DEALINGS IN THE SOFTWARE.

 *

 * Copyright (C) 2017 Stefano Stabellini <stefano@aporeto.com>

 */

#ifndef __XEN_PUBLIC_IO_9PFS_H__

#define __XEN_PUBLIC_IO_9PFS_H__

#include "xen/interface/io/ring.h"

/*

 * See docs/misc/9pfs.markdown in xen.git for the full specification:

 * https://xenbits.xen.org/docs/unstable/misc/9pfs.html

 */

DEFINE_XEN_FLEX_RING_AND_INTF(xen_9pfs);

#endif