fs: deduplicate placeholders for generic and xattrs

internal/fs/node_unix.go

@@ -5,8 +5,20 @@ package fs
 
 import (
 	"os"
+
+	"github.com/restic/restic/internal/restic"
 )
 
 func lchown(name string, uid, gid int) error {
 	return os.Lchown(name, uid, gid)
 }
+
+// nodeRestoreGenericAttributes is no-op.
+func nodeRestoreGenericAttributes(node *restic.Node, _ string, warn func(msg string)) error {
+	return restic.HandleAllUnknownGenericAttributesFound(node.GenericAttributes, warn)
+}
+
+// nodeFillGenericAttributes is a no-op.
+func nodeFillGenericAttributes(_ *restic.Node, _ string, _ *ExtendedFileInfo) error {
+	return nil
+}