qemu/include/hw/virtio/vhost-backend.h

   1 /*
   2  * vhost-backend
   3  *
   4  * Copyright (c) 2013 Virtual Open Systems Sarl.
   5  *
   6  * This work is licensed under the terms of the GNU GPL, version 2 or later.
   7  * See the COPYING file in the top-level directory.
   8  *
   9  */
  10
  11 #ifndef VHOST_BACKEND_H_
  12 #define VHOST_BACKEND_H_
  13
  14 typedef enum VhostBackendType {
  15     VHOST_BACKEND_TYPE_NONE = 0,
  16     VHOST_BACKEND_TYPE_KERNEL = 1,
  17     VHOST_BACKEND_TYPE_USER = 2,
  18     VHOST_BACKEND_TYPE_MAX = 3,
  19 } VhostBackendType;
  20
  21 struct vhost_dev;
  22
  23 typedef int (*vhost_call)(struct vhost_dev *dev, unsigned long int request,
  24              void *arg);
  25 typedef int (*vhost_backend_init)(struct vhost_dev *dev, void *opaque);
  26 typedef int (*vhost_backend_cleanup)(struct vhost_dev *dev);
  27
  28 typedef struct VhostOps {
  29     VhostBackendType backend_type;
  30     vhost_call vhost_call;
  31     vhost_backend_init vhost_backend_init;
  32     vhost_backend_cleanup vhost_backend_cleanup;
  33 } VhostOps;
  34
  35 extern const VhostOps user_ops;
  36
  37 int vhost_set_backend_type(struct vhost_dev *dev,
  38                            VhostBackendType backend_type);
  39
  40 #endif /* VHOST_BACKEND_H_ */