Make it possible to limit the total transfer time.

Set the default total transfer time to 600s.

bin/varnishd/cache_acceptor.c

@@ -318,9 +318,9 @@ vca_acct(void *arg)
 	while (1) {
 		(void)sleep(1);
 #ifdef SO_SNDTIMEO_WORKS
-		if (params->send_timeout != send_timeout) {
+		if (params->idle_send_timeout != send_timeout) {
 			need_test = 1;
-			send_timeout = params->send_timeout;
+			send_timeout = params->idle_send_timeout;
 			tv_sndtimeo = VTIM_timeval(send_timeout);
 			VTAILQ_FOREACH(ls, &heritage.socks, list) {
 				if (ls->sock < 0)

bin/varnishd/cache_wrw.c

@@ -51,6 +51,7 @@
 #include <stdio.h>
 
 #include "cache.h"
+#include "vtim.h"
 
 /*--------------------------------------------------------------------
  */
@@ -133,6 +134,14 @@ WRW_Flush(struct worker *w)
 			*/
 			size_t used = 0;
 
+			if (VTIM_real() - w->sp->t_resp > params->send_timeout) {
+				WSL(w, SLT_Debug, *wrw->wfd,
+				    "Hit total send timeout, wrote = %ld/%ld; not retrying",
+				    i, wrw->liov);
+				i = -1;
+				break;
+			}
+
 			WSL(w, SLT_Debug, *wrw->wfd,
 			    "Hit send timeout, wrote = %ld/%ld; retrying",
 			    i, wrw->liov);

bin/varnishd/heritage.h

@@ -112,6 +112,7 @@ struct params {
 	unsigned		sess_timeout;
 	unsigned		pipe_timeout;
 	unsigned		send_timeout;
+	unsigned		idle_send_timeout;
 
 	/* Management hints */
 	unsigned		auto_restart;

bin/varnishd/mgt/mgt_param.c

@@ -613,6 +613,13 @@ static const struct parspec input_parspec[] = {
                 "seconds the session is closed. \n"
 		"See setsockopt(2) under SO_SNDTIMEO for more information.",
 		DELAYED_EFFECT,
+		"600", "seconds" },
+	{ "idle_send_timeout", tweak_timeout, &master.idle_send_timeout, 0, 0,
+		"Time to wait with no data sent. "
+		"If no data has been transmitted in this many\n"
+                "seconds the session is closed. \n"
+		"See setsockopt(2) under SO_SNDTIMEO for more information.",
+		DELAYED_EFFECT,
 		"60", "seconds" },
 	{ "auto_restart", tweak_bool, &master.auto_restart, 0, 0,
 		"Restart child process automatically if it dies.\n",