kvm tools: Add MACRO for user and tap mode for virtio net

This patch prepares the user and tap mode for virtio net.

Signed-off-by: Asias He <asias.hejun@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>

include/kvm/virtio-net.h

@@ -8,8 +8,12 @@ struct virtio_net_parameters {
 	const char *host_ip;
 	char guest_mac[6];
 	const char *script;
+	int mode;
 };
 
 void virtio_net__init(const struct virtio_net_parameters *params);
 
+#define NET_MODE_USER	0
+#define NET_MODE_TAP	1
+
 #endif /* KVM__VIRTIO_NET_H */

virtio/net.c

@@ -63,6 +63,9 @@ struct net_device {
 
 	int				tap_fd;
 	char				tap_name[IFNAMSIZ];
+
+	int				mode;
+
 };
 
 static struct net_device ndev = {