UBI_CTRL_IOC_MAGIC  184 include/uapi/mtd/ubi-user.h #define UBI_IOCATT _IOW(UBI_CTRL_IOC_MAGIC, 64, struct ubi_attach_req)
UBI_CTRL_IOC_MAGIC  186 include/uapi/mtd/ubi-user.h #define UBI_IOCDET _IOW(UBI_CTRL_IOC_MAGIC, 65, __s32)