Address review feedback

- Use ResolveNamespaceList() instead of GetIncludes() for more accurate
  namespace resolution when building the PVC-to-Pod cache
- Refactor NewVolumeHelperImpl to call NewVolumeHelperImplWithCache with
  nil cache parameter to avoid code duplication

Signed-off-by: Shubham Pampattiwar <spampatt@redhat.com>

internal/volumehelper/volume_policy_helper.go

@@ -46,15 +46,15 @@ func NewVolumeHelperImpl(
 	defaultVolumesToFSBackup bool,
 	backupExcludePVC bool,
 ) VolumeHelper {
-	return &volumeHelperImpl{
-		volumePolicy:             volumePolicy,
-		snapshotVolumes:          snapshotVolumes,
-		logger:                   logger,
-		client:                   client,
-		defaultVolumesToFSBackup: defaultVolumesToFSBackup,
-		backupExcludePVC:         backupExcludePVC,
-		pvcPodCache:              nil, // Cache will be nil by default for backward compatibility
-	}
+	return NewVolumeHelperImplWithCache(
+		volumePolicy,
+		snapshotVolumes,
+		logger,
+		client,
+		defaultVolumesToFSBackup,
+		backupExcludePVC,
+		nil,
+	)
 }
 
 // NewVolumeHelperImplWithCache creates a VolumeHelper with a PVC-to-Pod cache for improved performance.

pkg/backup/backup.go

@@ -413,8 +413,11 @@ func (kb *kubernetesBackupper) BackupWithResolvers(
 	// This avoids O(N*M) complexity when there are many PVCs and pods.
 	// See issue #9179 for details.
 	pvcPodCache := podvolumeutil.NewPVCPodCache()
-	namespaces := backupRequest.NamespaceIncludesExcludes.GetIncludes()
-	if len(namespaces) > 0 {
+	namespaces, err := backupRequest.NamespaceIncludesExcludes.ResolveNamespaceList()
+	if err != nil {
+		log.WithError(err).Warn("Failed to resolve namespace list for PVC-to-Pod cache, falling back to direct lookups")
+		pvcPodCache = nil
+	} else if len(namespaces) > 0 {
 		if err := pvcPodCache.BuildCacheForNamespaces(context.Background(), namespaces, kb.kbClient); err != nil {
 			// Log warning but continue - the cache will fall back to direct lookups
 			log.WithError(err).Warn("Failed to build PVC-to-Pod cache, falling back to direct lookups")