-#define KERNEL_IO_CREATE_CHANNEL _IOW(0xF6, 0x43, struct lttng_channel)
-#define KERNEL_IO_CREATE_STREAM _IO(0xF6, 0x44)
-#define KERNEL_IO_CREATE_EVENT _IOW(0xF6, 0x45, struct lttng_event)
+#define KERNEL_CREATE_CHANNEL _IOW(0xF6, 0x43, struct lttng_channel)
+#define KERNEL_CREATE_STREAM _IO(0xF6, 0x44)
+#define KERNEL_CREATE_EVENT _IOW(0xF6, 0x45, struct lttng_event)
+
+#define KERNEL_OPEN_METADATA _IOW(0xF6, 0x46, struct lttng_channel)