MINOR: mux-h2: provide a "show_sd" helper to output stream debugging info

With this, it now becomes possible to see the state of each H2 stream from
"show sess all". Lines are still too long and need to be split, but that's
for another patch.

diff --git a/src/mux_h2.c b/src/mux_h2.c
index 4d2a5a9bc6e78f43e6e821275774fd524061cc68..f67d69c7c679fac244e400c586bef025709f8fb2 100644 (file)
--- a/src/mux_h2.c
+++ b/src/mux_h2.c
@@ -6849,6 +6849,28 @@ static int h2_show_fd(struct buffer *msg, struct connection *conn)
        return ret;
 }
 
+/* for debugging with CLI's "show sess" command. May emit multiple lines, each
+ * new one being prefixed with <pfx>, if <pfx> is not NULL, otherwise a single
+ * line is used. Each field starts with a space so it's safe to print it after
+ * existing fields.
+ */
+static int h2_show_sd(struct buffer *msg, struct sedesc *sd, const char *pfx)
+{
+       struct h2s *h2s = sd->se;
+       int ret = 0;
+
+       if (!h2s)
+               return ret;
+
+       chunk_appendf(msg, " h2s=%p", h2s);
+       ret |= h2_dump_h2s_info(msg, h2s);
+       if (pfx)
+               chunk_appendf(msg, "\n%s", pfx);
+       chunk_appendf(msg, " h2c=%p", h2s->h2c);
+       ret |= h2_dump_h2c_info(msg, h2s->h2c);
+       return ret;
+}
+
 /* Migrate the the connection to the current thread.
  * Return 0 if successful, non-zero otherwise.
  * Expected to be called with the old thread lock held.
@@ -7000,6 +7022,7 @@ static const struct mux_ops h2_ops = {
        .shutw = h2_shutw,
        .ctl = h2_ctl,
        .show_fd = h2_show_fd,
+       .show_sd = h2_show_sd,
        .takeover = h2_takeover,
        .flags = MX_FL_HTX|MX_FL_HOL_RISK|MX_FL_NO_UPG,
        .name = "H2",