#define IOC_LIBCFS_ADD_INTERFACE _IOWR('e', 78, long)
#define IOC_LIBCFS_DEL_INTERFACE _IOWR('e', 79, long)
#define IOC_LIBCFS_GET_INTERFACE _IOWR('e', 80, long)
#define IOC_LIBCFS_ADD_INTERFACE _IOWR('e', 78, long)
#define IOC_LIBCFS_DEL_INTERFACE _IOWR('e', 79, long)
#define IOC_LIBCFS_GET_INTERFACE _IOWR('e', 80, long)