pkg: types: Add a new field type

The Interface structure needs a new field 'type' so that we can
properly determine the type of interface being described.

This will be helpful for network hotplug, as it will be used to
create the appropriate connection between the VM and the interface.

Depends-on: github.com/kata-containers/runtime#858

Fixes #401

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>

Author: Sebastien Boeuf

pkg/types/types.pb.go

@@ -30,6 +30,12 @@ message Interface {
 	// Here, bridgeAddr is the address at which the bridge is attached on the root bus,
 	// while deviceAddr is the address at which the network device is attached on the bridge.
 	string pciAddr = 6;
+
+	// Type defines the type of interface described by this structure.
+	// The expected values are the one that are defined by the netlink
+	// library, regarding each type of link. Here is a non exhaustive
+	// list: "veth", "macvtap", "vlan", "macvlan", "tap", ...
+	string type = 7;
 }
 
 message Route {