.open = r_heartbeat_file_open,
.release = r_heartbeat_file_close,
.read = r_heartbeat_file_read,
.write = r_heartbeat_file_write,
};
.open = r_heartbeat_file_open,
.release = r_heartbeat_file_close,
.read = r_heartbeat_file_read,
.write = r_heartbeat_file_write,
};