Adding delete timestamp check

Author: shreyashastantram

cns/middlewares/k8sSwiftV2.go

@@ -28,6 +28,7 @@ var (
 	errGetMTPNC                 = errors.New(NetworkNotReadyErrorMsg + " - failed to get MTPNC")
 	errInvalidSWIFTv2NICType    = errors.New("invalid NIC type for SWIFT v2 scenario")
 	errInvalidMTPNCPrefixLength = errors.New("invalid prefix length for MTPNC primaryIP, must be 32")
+	errDeleteTimestampSet       = errors.New("MTPNC deletion timestamp is set")
 )
 
 type K8sSWIFTv2Middleware struct {
@@ -193,6 +194,9 @@ func (k *K8sSWIFTv2Middleware) getMTPNC(ctx context.Context, podInfo cns.PodInfo
 	if err := k.Cli.Get(ctx, mtpncNamespacedName, &mtpnc); err != nil {
 		return v1alpha1.MultitenantPodNetworkConfig{}, types.UnexpectedError, errors.Wrap(err, errGetMTPNC.Error()).Error()
 	}
+	if mtpnc.DeletionTimestamp != nil {
+		return v1alpha1.MultitenantPodNetworkConfig{}, types.UnexpectedError, errDeleteTimestampSet.Error()
+	}
 	// Check if the MTPNC CRD is ready. If one of the fields is empty, return error
 	if !mtpnc.IsReady() {
 		return v1alpha1.MultitenantPodNetworkConfig{}, types.UnexpectedError, errMTPNCNotReady.Error()