int ustctl_open_metadata(int sock, int session_handle,
struct lttng_ust_channel_attr *chops,
struct lttng_ust_object_data **metadata_data);
int ustctl_open_metadata(int sock, int session_handle,
struct lttng_ust_channel_attr *chops,
struct lttng_ust_object_data **metadata_data);