diff --git a/src/xdevice/_core/constants.py b/src/xdevice/_core/constants.py
index e8908726706ea6d4e3b9f04a215cada047e22b6b..0d0ad4cb30d63ce7465eafb2f2ec8f81c0c82c46 100644
--- a/src/xdevice/_core/constants.py
+++ b/src/xdevice/_core/constants.py
@@ -283,3 +283,10 @@ class ConfigConst(object):
     module_kits = "module_kits"
     spt = "spt"
     version = "version"
+
+
+class FilePermission(object):
+    mode_777 = 0o777
+    mode_755 = 0o755
+    mode_644 = 0o644
+    
\ No newline at end of file