Use an app for macvlan

luci-app-macvlan/files/luci/model/cbi/macvlan/macvlan.lua

@@ -0,0 +1,22 @@
+-- Copyright (C) 2019 X-WRT <dev@x-wrt.com>
+
+local net = require "luci.model.network".init()
+local ifaces = net:get_interfaces() or { net:get_interface() }
+
+m = Map("macvlan", translate("Macvlan"))
+
+s = m:section(TypedSection, "macvlan", translate("Macvlan Settings"))
+s.addremove = true
+s.anonymous = false
+s.template = "cbi/tblsection"
+
+hn = s:option(ListValue, "ifname", translate("Interface"))
+hn.rmempty  = false
+
+for _, iface in ipairs(ifaces) do
+	if iface:type() ~= "macvlan" then
+		hn:value(iface:name(),"%s" % iface:name())
+	end
+end
+
+return m