From 9060fc02b50db59ea97abedc2fce81cbf4eebcfe Mon Sep 17 00:00:00 2001
From: Christopher Faulet <cfaulet@haproxy.com>
Date: Wed, 3 Jul 2019 11:39:30 +0200
Subject: [PATCH] BUG/MINOR: hlua/htx: Respect the reserve when HTX data are
 sent

The previous commit 7e145b3e2 ("BUG/MINOR: hlua: Don't use
channel_htx_recv_max()") is buggy. The buffer's reserve must be respected.

This patch must be backported to 2.0 and 1.9.
---
 src/hlua.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/hlua.c b/src/hlua.c
index 592a0ab91..af2400400 100644
--- a/src/hlua.c
+++ b/src/hlua.c
@@ -4555,7 +4555,7 @@ __LJMP static int hlua_applet_htx_send_yield(lua_State *L, int status, lua_KCont
 	int l = MAY_LJMP(luaL_checkinteger(L, 3));
 	int max;
 
-	max = htx_free_data_space(htx);
+	max = htx_get_max_blksz(htx, channel_htx_recv_max(res, htx));
 	if (!max)
 		goto snd_yield;