MINOR: mux-quic: add traces on sd attach

Add traces into qcs_attach_sc(). This function is called when a request
is received on a QCS stream and a streamdesc instance is attached. This
will be useful to facilitate debugging.

(cherry picked from commit 4a997e5a932ef35982f4df3ac3ba5871798be2ef)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>

diff --git a/src/mux_quic.c b/src/mux_quic.c
index c0b35e2..5d28381 100644 (file)
--- a/src/mux_quic.c
+++ b/src/mux_quic.c
@@ -894,17 +894,27 @@ void qcs_send_metadata(struct qcs *qcs)
        qc_stream_desc_sub_room(qcs->stream, NULL);
 }
 
+/* Instantiate a streamdesc instance for <qcs> stream. This is necessary to
+ * transfer data after a new request reception. <buf> can be used to forward
+ * the first received request data. <fin> must be set if the whole request is
+ * already received.
+ *
+ * Returns the newly allocated instance on success or NULL on error.
+ */
 struct stconn *qcs_attach_sc(struct qcs *qcs, struct buffer *buf, char fin)
 {
        struct qcc *qcc = qcs->qcc;
        struct session *sess = qcc->conn->owner;
 
+       TRACE_ENTER(QMUX_EV_STRM_RECV, qcc->conn, qcs);
 
        /* TODO duplicated from mux_h2 */
        sess->t_idle = ns_to_ms(now_ns - sess->accept_ts) - sess->t_handshake;
 
-       if (!sc_new_from_endp(qcs->sd, sess, buf))
+       if (!sc_new_from_endp(qcs->sd, sess, buf)) {
+               TRACE_DEVEL("leaving on error", QMUX_EV_STRM_RECV, qcc->conn, qcs);
                return NULL;
+       }
 
        /* QC_SF_HREQ_RECV must be set once for a stream. Else, nb_hreq counter
         * will be incorrect for the connection.
@@ -948,6 +958,7 @@ struct stconn *qcs_attach_sc(struct qcs *qcs, struct buffer *buf, char fin)
                se_fl_set_error(qcs->sd);
        }
 
+       TRACE_LEAVE(QMUX_EV_STRM_RECV, qcc->conn, qcs);
        return qcs->sd->sc;
 }