#define RING_BUFFER_FLUSH _IO(0xF6, 0x0C)
/* Get the current version of the metadata cache (after a get_next). */
#define RING_BUFFER_GET_METADATA_VERSION _IOR(0xF6, 0x0D, uint64_t)
#define RING_BUFFER_FLUSH _IO(0xF6, 0x0C)
/* Get the current version of the metadata cache (after a get_next). */
#define RING_BUFFER_GET_METADATA_VERSION _IOR(0xF6, 0x0D, uint64_t)