Commit b37eeb02 authored by Stefano Stabellini's avatar Stefano Stabellini
Browse files

xen/9pfs: introduce Xen 9pfs backend 



Introduce the Xen 9pfs backend: add struct XenDevOps to register as a
Xen backend and add struct V9fsTransport to register as v9fs transport.

All functions are empty stubs for now.

Signed-off-by: default avatarStefano Stabellini <stefano@aporeto.com>
Reviewed-by: default avatarGreg Kurz <groug@kaod.org>
CC: anthony.perard@citrix.com
CC: jgross@suse.com
CC: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
CC: Greg Kurz <groug@kaod.org>
parent c9fb47e7

hw/9pfs/xen-9p-backend.c

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/*

 * Xen 9p backend

 *

 * Copyright Aporeto 2017

 *

 * Authors:

 *  Stefano Stabellini <stefano@aporeto.com>

 *

 */



#include "qemu/osdep.h"



#include "hw/hw.h"

#include "hw/9pfs/9p.h"

#include "hw/xen/xen_backend.h"

#include "hw/9pfs/xen-9pfs.h"

#include "qemu/config-file.h"

#include "fsdev/qemu-fsdev.h"



typedef struct Xen9pfsDev {

    struct XenDevice xendev;  /* must be first */

} Xen9pfsDev;



static ssize_t xen_9pfs_pdu_vmarshal(V9fsPDU *pdu,

                                     size_t offset,

                                     const char *fmt,

                                     va_list ap)

{

    return 0;

}



static ssize_t xen_9pfs_pdu_vunmarshal(V9fsPDU *pdu,

                                       size_t offset,

                                       const char *fmt,

                                       va_list ap)

{

    return 0;

}



static void xen_9pfs_init_out_iov_from_pdu(V9fsPDU *pdu,

                                           struct iovec **piov,

                                           unsigned int *pniov)

{

}



static void xen_9pfs_init_in_iov_from_pdu(V9fsPDU *pdu,

                                          struct iovec **piov,

                                          unsigned int *pniov,

                                          size_t size)

{

}



static void xen_9pfs_push_and_notify(V9fsPDU *pdu)

{

}



static const struct V9fsTransport xen_9p_transport = {

    .pdu_vmarshal = xen_9pfs_pdu_vmarshal,

    .pdu_vunmarshal = xen_9pfs_pdu_vunmarshal,

    .init_in_iov_from_pdu = xen_9pfs_init_in_iov_from_pdu,

    .init_out_iov_from_pdu = xen_9pfs_init_out_iov_from_pdu,

    .push_and_notify = xen_9pfs_push_and_notify,

};



static int xen_9pfs_init(struct XenDevice *xendev)

{

    return 0;

}



static int xen_9pfs_free(struct XenDevice *xendev)

{

    return -1;

}



static int xen_9pfs_connect(struct XenDevice *xendev)

{

    return 0;

}



static void xen_9pfs_alloc(struct XenDevice *xendev)

{

}



static void xen_9pfs_disconnect(struct XenDevice *xendev)

{

}



struct XenDevOps xen_9pfs_ops = {

    .size       = sizeof(Xen9pfsDev),

    .flags      = DEVOPS_FLAG_NEED_GNTDEV,

    .alloc      = xen_9pfs_alloc,

    .init       = xen_9pfs_init,

    .initialise = xen_9pfs_connect,

    .disconnect = xen_9pfs_disconnect,

    .free       = xen_9pfs_free,

};

hw/9pfs/xen-9pfs.h

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/*

 * Xen 9p backend

 *

 * Copyright Aporeto 2017

 *

 * Authors:

 *  Stefano Stabellini <stefano@aporeto.com>

 *

 * This work is licensed under the terms of the GNU GPL version 2 or

 * later. See the COPYING file in the top-level directory.

 *

 */



#include <xen/io/protocols.h>

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



/*

 * Do not merge into xen-9p-backend.c: clang doesn't allow unused static

 * inline functions in c files.

 */

DEFINE_XEN_FLEX_RING_AND_INTF(xen_9pfs);