report incremental fallback message

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

pkg/controller/data_download_controller.go

@@ -617,8 +617,10 @@ func (r *DataDownloadReconciler) OnDataDownloadProgress(ctx context.Context, nam
 		}
 
 		if progress.Message != "" {
-			dd.Status.Message += progress.Message
-			dd.Status.Message += ";"
+			message := progress.Message + ";"
+			if !strings.HasSuffix(dd.Status.Message, message) {
+				dd.Status.Message += message
+			}
 		}
 
 		return true

pkg/controller/data_upload_controller.go

@@ -642,8 +642,10 @@ func (r *DataUploadReconciler) OnDataUploadProgress(ctx context.Context, namespa
 		}
 
 		if progress.Message != "" {
-			du.Status.Message += progress.Message
-			du.Status.Message += ";"
+			message := progress.Message + ";"
+			if !strings.HasSuffix(du.Status.Message, message) {
+				du.Status.Message += message
+			}
 		}
 
 		return true

pkg/controller/pod_volume_backup_controller.go

@@ -636,8 +636,10 @@ func (r *PodVolumeBackupReconciler) OnDataPathProgress(ctx context.Context, name
 		}
 
 		if progress.Message != "" {
-			pvb.Status.Message += progress.Message
-			pvb.Status.Message += ";"
+			message := progress.Message + ";"
+			if !strings.HasSuffix(pvb.Status.Message, message) {
+				pvb.Status.Message += message
+			}
 		}
 
 		return true

pkg/controller/pod_volume_restore_controller.go

@@ -913,8 +913,10 @@ func (r *PodVolumeRestoreReconciler) OnDataPathProgress(ctx context.Context, nam
 		}
 
 		if progress.Message != "" {
-			pvr.Status.Message += progress.Message
-			pvr.Status.Message += ";"
+			message := progress.Message + ";"
+			if !strings.HasSuffix(pvr.Status.Message, message) {
+				pvr.Status.Message += message
+			}
 		}
 
 		return true