Update netlink dependency.

vendor/github.com/vishvananda/netlink/netlink_test.go

@@ -0,0 +1,58 @@
+package netlink
+
+import (
+	"log"
+	"os"
+	"runtime"
+	"testing"
+
+	"github.com/vishvananda/netns"
+)
+
+type tearDownNetlinkTest func()
+
+func skipUnlessRoot(t *testing.T) {
+	if os.Getuid() != 0 {
+		msg := "Skipped test because it requires root privileges."
+		log.Printf(msg)
+		t.Skip(msg)
+	}
+}
+
+func setUpNetlinkTest(t *testing.T) tearDownNetlinkTest {
+	skipUnlessRoot(t)
+
+	// new temporary namespace so we don't pollute the host
+	// lock thread since the namespace is thread local
+	runtime.LockOSThread()
+	var err error
+	ns, err := netns.New()
+	if err != nil {
+		t.Fatal("Failed to create newns", ns)
+	}
+
+	return func() {
+		ns.Close()
+		runtime.UnlockOSThread()
+	}
+}
+
+func setUpMPLSNetlinkTest(t *testing.T) tearDownNetlinkTest {
+	if _, err := os.Stat("/proc/sys/net/mpls/platform_labels"); err != nil {
+		msg := "Skipped test because it requires MPLS support."
+		log.Printf(msg)
+		t.Skip(msg)
+	}
+	f := setUpNetlinkTest(t)
+	setUpF := func(path, value string) {
+		file, err := os.Create(path)
+		defer file.Close()
+		if err != nil {
+			t.Fatalf("Failed to open %s: %s", path, err)
+		}
+		file.WriteString(value)
+	}
+	setUpF("/proc/sys/net/mpls/platform_labels", "1024")
+	setUpF("/proc/sys/net/mpls/conf/lo/input", "1")
+	return f
+}