MINOR: mux-h2/trace: add a state trace on stream creation/destruction

Logging below the developer level doesn't always yield very convenient
traces as we don't know well where streams are allocated nor released.
Let's just make that more explicit by using state-level traces for these
important steps.

diff --git a/src/mux_h2.c b/src/mux_h2.c
index d8e185038826f29793bca25accf5dc5ff92fa185..c8d588f50f3bc7d69a0a8ed3d7f8bae0dd197f62 100644 (file)
--- a/src/mux_h2.c
+++ b/src/mux_h2.c
@@ -1556,6 +1556,7 @@ static inline void h2s_close(struct h2s *h2s)
 {
        if (h2s->st != H2_SS_CLOSED) {
                TRACE_ENTER(H2_EV_H2S_END, h2s->h2c->conn, h2s);
+               TRACE_STATE("releasing H2 stream", H2_EV_H2S_NEW, h2s->h2c->conn, h2s);
                h2s->h2c->nb_streams--;
                if (!h2s->id)
                        h2s->h2c->nb_reserved--;
@@ -1757,6 +1758,8 @@ static struct h2s *h2c_frt_stream_new(struct h2c *h2c, int id, struct buffer *in
        /* OK done, the stream lives its own life now */
        if (h2_frt_has_too_many_sc(h2c))
                h2c->flags |= H2_CF_DEM_TOOMANY;
+
+       TRACE_STATE("created new H2 front stream", H2_EV_H2S_NEW, h2c->conn, h2s);
        TRACE_LEAVE(H2_EV_H2S_NEW, h2c->conn);
        return h2s;
 
@@ -1814,6 +1817,7 @@ static struct h2s *h2c_bck_stream_new(struct h2c *h2c, struct stconn *sc, struct
                se_fl_set(h2s->sd, SE_FL_MAY_FASTFWD_CONS);
        /* on the backend we can afford to only count total streams upon success */
        h2c->stream_cnt++;
+       TRACE_STATE("created new H2 back stream", H2_EV_H2S_NEW, h2c->conn, h2s);
 
  out:
        if (likely(h2s))