From: Christopher Faulet <cfaulet@haproxy.com>
Date: Fri, 5 May 2023 09:40:30 +0000 (+0200)
Subject: MEDIUM: stconn: Check room needed to unblock opposite SC when data was sent
X-Git-Tag: v2.8-dev10~35
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e7405d412484806aab0300bbf5b7bebf33263942;p=thirdparty%2Fhaproxy.git

MEDIUM: stconn: Check room needed to unblock opposite SC when data was sent

After a sending attempt, we check the opposite SC to see if it is waiting
for a minimum free space to receive more data. If the condition is
respected, it is unblocked. 0 is special case where the SC is
unconditionally unblocked.
---

diff --git a/src/stconn.c b/src/stconn.c
index 4290961d1f..39dcbb5f0c 100644
--- a/src/stconn.c
+++ b/src/stconn.c
@@ -1664,9 +1664,11 @@ static int sc_conn_send(struct stconn *sc)
 		oc->flags |= CF_WRITE_EVENT | CF_WROTE_DATA;
 		if (sc->state == SC_ST_CON)
 			sc->state = SC_ST_RDY;
-		sc_have_room(sc_opposite(sc));
 	}
 
+	if (!sco->room_needed || (did_send && (sco->room_needed < 0 || channel_recv_max(sc_oc(sc)) >= sco->room_needed)))
+		sc_have_room(sco);
+
 	if (sc_ep_test(sc, SE_FL_ERROR | SE_FL_ERR_PENDING)) {
 		oc->flags |= CF_WRITE_EVENT;
 		BUG_ON(sc_ep_test(sc, SE_FL_EOS|SE_FL_ERROR|SE_FL_ERR_PENDING) == (SE_FL_EOS|SE_FL_ERR_PENDING));