add diagnostic for data mover exposer

Signed-off-by: Lyndon-Li <lyonghui@vmware.com>

pkg/controller/data_download_controller.go

@@ -677,6 +677,8 @@ func (r *DataDownloadReconciler) onPrepareTimeout(ctx context.Context, dd *veler
 		return
 	}
 
+	log.Warn(r.restoreExposer.DiagnoseExpose(ctx, getDataDownloadOwnerObject(dd)))
+
 	r.restoreExposer.CleanUp(ctx, getDataDownloadOwnerObject(dd))
 
 	log.Info("Dataupload has been cleaned up")

pkg/controller/data_download_controller_test.go

@@ -971,6 +971,10 @@ func (dt *ddResumeTestHelper) PeekExposed(context.Context, corev1.ObjectReferenc
 	return nil
 }
 
+func (dt *ddResumeTestHelper) DiagnoseExpose(context.Context, corev1.ObjectReference) string {
+	return ""
+}
+
 func (dt *ddResumeTestHelper) RebindVolume(context.Context, corev1.ObjectReference, string, string, time.Duration) error {
 	return nil
 }

pkg/controller/data_upload_controller.go

@@ -755,6 +755,8 @@ func (r *DataUploadReconciler) onPrepareTimeout(ctx context.Context, du *velerov
 			volumeSnapshotName = du.Spec.CSISnapshot.VolumeSnapshot
 		}
 
+		log.Warn(ep.DiagnoseExpose(ctx, getOwnerObject(du)))
+
 		ep.CleanUp(ctx, getOwnerObject(du), volumeSnapshotName, du.Spec.SourceNamespace)
 
 		log.Info("Dataupload has been cleaned up")

pkg/controller/data_upload_controller_test.go

@@ -300,6 +300,10 @@ func (f *fakeSnapshotExposer) PeekExposed(ctx context.Context, ownerObject corev
 	return f.peekErr
 }
 
+func (f *fakeSnapshotExposer) DiagnoseExpose(context.Context, corev1.ObjectReference) string {
+	return ""
+}
+
 func (f *fakeSnapshotExposer) CleanUp(context.Context, corev1.ObjectReference, string, string) {
 }
 
@@ -1043,6 +1047,10 @@ func (dt *duResumeTestHelper) PeekExposed(context.Context, corev1.ObjectReferenc
 	return nil
 }
 
+func (dt *duResumeTestHelper) DiagnoseExpose(context.Context, corev1.ObjectReference) string {
+	return ""
+}
+
 func (dt *duResumeTestHelper) CleanUp(context.Context, corev1.ObjectReference, string, string) {}
 
 func (dt *duResumeTestHelper) newMicroServiceBRWatcher(kbclient.Client, kubernetes.Interface, manager.Manager, string, string, string, string, string, string,