netmon: Rely on new interface field LinkType

In order to provide the right information about the interface that
needs to be added, kata-netmon provisions the new field LinkType of
the Interface structure.

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

netmon/netmon.go

@@ -259,7 +259,7 @@ func (n *netmon) listenNetlinkEvents() error {
 // convertInterface converts a link and its IP addresses as defined by netlink
 // package, into the Interface structure format expected by kata-runtime to
 // describe an interface and its associated IP addresses.
-func convertInterface(linkAttrs *netlink.LinkAttrs, addrs []netlink.Addr) types.Interface {
+func convertInterface(linkAttrs *netlink.LinkAttrs, linkType string, addrs []netlink.Addr) types.Interface {
 	if linkAttrs == nil {
 		netmonLog.Warn("Link attributes are nil")
 		return types.Interface{}
@@ -289,6 +289,7 @@ func convertInterface(linkAttrs *netlink.LinkAttrs, addrs []netlink.Addr) types.
 		IPAddresses: ipAddrs,
 		Mtu:         uint64(linkAttrs.MTU),
 		HwAddr:      linkAttrs.HardwareAddr.String(),
+		LinkType:    linkType,
 	}
 
 	netmonLog.WithField("interface", iface).Debug("Interface converted")
@@ -369,7 +370,7 @@ func (n *netmon) scanNetwork() error {
 			continue
 		}
 
-		iface := convertInterface(linkAttrs, addrs)
+		iface := convertInterface(linkAttrs, link.Type(), addrs)
 		n.netIfaces[linkAttrs.Index] = iface
 	}
 
@@ -497,7 +498,7 @@ func (n *netmon) handleRTMNewLink(ev netlink.LinkUpdate) error {
 	}
 
 	// Convert the interfaces in the appropriate structure format.
-	iface := convertInterface(linkAttrs, addrs)
+	iface := convertInterface(linkAttrs, ev.Link.Type(), addrs)
 
 	// Add the interface through the Kata CLI.
 	if err := n.addInterfaceCLI(iface); err != nil {

netmon/netmon_test.go

@@ -174,6 +174,8 @@ func TestConvertInterface(t *testing.T) {
 		HardwareAddr: hwAddr,
 	}
 
+	linkType := "link_type_test"
+
 	expected := types.Interface{
 		Device: testIfaceName,
 		Name:   testIfaceName,
@@ -186,9 +188,10 @@ func TestConvertInterface(t *testing.T) {
 				Mask:    "0",
 			},
 		},
+		LinkType: linkType,
 	}
 
-	got := convertInterface(linkAttrs, addrs)
+	got := convertInterface(linkAttrs, linkType, addrs)
 	assert.True(t, reflect.DeepEqual(expected, got),
 		"Got %+v\nExpected %+v", got, expected)
 }
@@ -264,10 +267,11 @@ func testCreateDummyNetwork(t *testing.T, handler *netlink.Handle) (int, types.I
 	assert.NotNil(t, attrs)
 
 	iface := types.Interface{
-		Device: testIfaceName,
-		Name:   testIfaceName,
-		Mtu:    uint64(testMTU),
-		HwAddr: testHwAddr,
+		Device:   testIfaceName,
+		Name:     testIfaceName,
+		Mtu:      uint64(testMTU),
+		HwAddr:   testHwAddr,
+		LinkType: link.Type(),
 	}
 
 	return attrs.Index, iface