SMBMount: return error when getRootMappingPath fails

pkg/mounter/safe_mounter_windows.go

@@ -105,14 +105,11 @@ func (mounter *csiProxyMounter) SMBMount(source, target, fsType string, mountOpt
 		source = strings.TrimSuffix(source, "\\")
 	}
 
-	// Try to lock `mappingPath`. We avoid throwing any exception to backward compatibility.
-	unlock := func() {}
 	mappingPath, err := getRootMappingPath(source)
 	if err != nil {
-		klog.Warningf("getRootMappingPath(%s) failed with %v", source, err)
-	} else {
-		unlock = lock(mappingPath)
+		return fmt.Errorf("getRootMappingPath(%s) failed with %v", source, err)
 	}
+	unlock := lock(mappingPath)
 	defer unlock()
 
 	normalizedTarget := normalizeWindowsPath(target)
@@ -128,12 +125,8 @@ func (mounter *csiProxyMounter) SMBMount(source, target, fsType string, mountOpt
 	}
 	klog.V(2).Infof("mount %s on %s successfully", source, normalizedTarget)
 
-	if mappingPath != "" {
-		// When mount successful tries to increment mapping reference count.
-		err = incementRemotePathReferencesCount(mappingPath, source)
-		if err != nil {
-			klog.Warningf("incementMappingPathCount(%s, %s) failed with %v", mappingPath, source, err)
-		}
+	if err = incementRemotePathReferencesCount(mappingPath, source); err != nil {
+		klog.Warningf("incementMappingPathCount(%s, %s) failed with %v", mappingPath, source, err)
 	}
 
 	return nil