+/* Clear ring buffer content. */
+#define RING_BUFFER_CLEAR _IO(0xF6, 0x11)
+/*
+ * Get next metadata subbuffer, returning a flag indicating whether the
+ * metadata is guaranteed to be in a consistent state at the end of this
+ * sub-buffer (can be parsed).
+ */
+#define RING_BUFFER_GET_NEXT_SUBBUF_METADATA_CHECK _IOR(0xF6, 0x12, uint32_t)