* Return the size of the received data on success or else a negative lttng
* error code. If buf is NULL, 0 is returned on success.
*/
-int lttng_ctl_ask_sessiond_varlen(struct lttcomm_session_msg *lsm,
- const void *vardata, size_t varlen, void **buf);
+int lttng_ctl_ask_sessiond_fds_varlen(struct lttcomm_session_msg *lsm,
+ const int *fds, size_t nb_fd,
+ const void *vardata, size_t vardata_len,
+ void **user_payload_buf, void **user_cmd_header_buf,
+ size_t *user_cmd_header_len);
+/*
+ * Calls lttng_ctl_ask_sessiond_fds_varlen() with no expected command header.
+ */
+static inline
+int lttng_ctl_ask_sessiond_varlen_no_cmd_header(struct lttcomm_session_msg *lsm,
+ void *vardata, size_t vardata_len, void **user_payload_buf)
+{
+ return lttng_ctl_ask_sessiond_fds_varlen(lsm, NULL, 0, vardata,
+ vardata_len, user_payload_buf, NULL, NULL);
+}
+
+/*
+ * Calls lttng_ctl_ask_sessiond_fds_varlen() with fds and no expected command header.
+ */
+static inline
+int lttng_ctl_ask_sessiond_fds_no_cmd_header(struct lttcomm_session_msg *lsm,
+ const int *fds, size_t nb_fd, void **buf)
+{
+ return lttng_ctl_ask_sessiond_fds_varlen(lsm, fds, nb_fd, NULL,
+ 0, NULL, NULL, NULL);
+}
/*
* Use this if no variable length data needs to be sent.
*/
static inline
int lttng_ctl_ask_sessiond(struct lttcomm_session_msg *lsm, void **buf)
{
- return lttng_ctl_ask_sessiond_varlen(lsm, NULL, 0, buf);
+ return lttng_ctl_ask_sessiond_varlen_no_cmd_header(lsm, NULL, 0, buf);
}
int lttng_check_tracing_group(void);