From ab92bb2f679d66c7e12a6b1c0cdd76fe308f6546 Mon Sep 17 00:00:00 2001
From: "David S. Miller" <davem@davemloft.net>
Date: Mon, 9 Jul 2012 16:19:30 -0700
Subject: tcp: Abstract back handling peer aliveness test into helper function.

Signed-off-by: David S. Miller <davem@davemloft.net>
---
 net/ipv4/tcp_metrics.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

(limited to 'net/ipv4/tcp_metrics.c')

diff --git a/net/ipv4/tcp_metrics.c b/net/ipv4/tcp_metrics.c
index 2793ecf928d3..9afe703c85cc 100644
--- a/net/ipv4/tcp_metrics.c
+++ b/net/ipv4/tcp_metrics.c
@@ -1,7 +1,9 @@
+#include <linux/module.h>
 #include <linux/cache.h>
 #include <linux/tcp.h>
 
 #include <net/inet_connection_sock.h>
+#include <net/request_sock.h>
 #include <net/sock.h>
 #include <net/dst.h>
 #include <net/tcp.h>
@@ -190,3 +192,11 @@ reset:
 		tp->snd_cwnd = tcp_init_cwnd(tp, dst);
 	tp->snd_cwnd_stamp = tcp_time_stamp;
 }
+
+bool tcp_peer_is_proven(struct request_sock *req, struct dst_entry *dst)
+{
+	if (!dst)
+		return false;
+	return dst_metric(dst, RTAX_RTT) ? true : false;
+}
+EXPORT_SYMBOL_GPL(tcp_peer_is_proven);
-- 
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