From: Amaury Denoyelle <adenoyelle@haproxy.com>
Date: Wed, 13 May 2026 06:08:11 +0000 (+0200)
Subject: MINOR: mux_quic: implement basic committed_extra_streams accounting
X-Git-Tag: v3.4-dev13~21
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=e4adba6e6410dcfce72c9fbdb20ed32c45e663ef;p=thirdparty%2Fhaproxy.git

MINOR: mux_quic: implement basic committed_extra_streams accounting

Account QUIC frontend connections into committed_extra_streams when
stream elasticity setting is active. This is performed in QCC init and
release functions.

This patch has no impact on QUIC subsystem for now. Connections will
still allow a static number of concurrent streams based on
tune.quic.fe.stream.max-concurrent. However, this has a direct
repercussion on H2 subsystem, as a higher count of QUIC connections will
reduce the concurrent streams allowed there.
---

diff --git a/src/mux_quic.c b/src/mux_quic.c
index f9766509a..50a478bd0 100644
--- a/src/mux_quic.c
+++ b/src/mux_quic.c
@@ -3586,6 +3586,12 @@ static void qcc_release(struct qcc *qcc)
 	}
 	TRACE_PROTO("application layer released", QMUX_EV_QCC_END, conn);
 
+	if (!(qcc->flags & QC_CF_IS_BACK) && global.tune.streams_elasticity &&
+	    qcc->lfctl.ms_bidi_init > 1) {
+		_HA_ATOMIC_SUB(&tg_ctx->committed_extra_streams,
+		               qcc->lfctl.ms_bidi_init - 1);
+	}
+
 	if (conn && !conn_is_quic(conn)) {
 		b_free(&qcc->rx.qmux_buf);
 		b_free(&qcc->tx.qmux_buf);
@@ -3928,6 +3934,11 @@ static int qcm_init(struct connection *conn, struct proxy *prx,
 		qcc->next_bidi_l    = 0x01;
 		qcc->largest_uni_r  = 0x02;
 		qcc->next_uni_l     = 0x03;
+
+		if (global.tune.streams_elasticity && qcc->lfctl.ms_bidi_init > 1) {
+			_HA_ATOMIC_ADD(&tg_ctx->committed_extra_streams,
+			               qcc->lfctl.ms_bidi_init - 1);
+		}
 	}
 
 	qcc->wait_event.tasklet = tasklet_new();