+#define KDBUS_MSG_MAX_PAYLOAD_VEC_SIZE 0x00800000 /* maximum size of message header and items */
+#define KDBUS_PART_HEADER_SIZE offsetof(struct kdbus_item, data)
+#define KDBUS_PART_SIZE(s) KDBUS_ALIGN8((s) + KDBUS_PART_HEADER_SIZE)
+
+//todo restore if DBus policy will be applied in kdbus somehow
+#define POLICY_TO_KDBUS