#define IRP_DEFER_IO_COMPLETION 0x00000800
#define IRP_OB_QUERY_NAME 0x00001000
#define IRP_HOLD_DEVICE_QUEUE 0x00002000
+/* The following 2 are missing in latest WDK */
+#define IRP_RETRY_IO_COMPLETION 0x00004000
+#define IRP_CLASS_CACHE_OPERATION 0x00008000
#define IRP_QUOTA_CHARGED 0x01
#define IRP_ALLOCATED_MUST_SUCCEED 0x02