[IPV4]: Fix "ipOutNoRoutes" counter error for TCP and UDP

Signed-off-by: Wei Dong <weidong@cn.fujitsu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/ipv4/datagram.c

diff --git a/net/ipv4/datagram.c b/net/ipv4/datagram.c
index dd02a45..0301dd4 100644
--- a/net/ipv4/datagram.c
+++ b/net/ipv4/datagram.c
@@ -50,8 +50,12 @@
 			       RT_CONN_FLAGS(sk), oif,
 			       sk->sk_protocol,
 			       inet->sport, usin->sin_port, sk, 1);
-	if (err)
+	if (err) {
+		if (err == -ENETUNREACH)
+			IP_INC_STATS_BH(IPSTATS_MIB_OUTNOROUTES);
 		return err;
+	}
+
 	if ((rt->rt_flags & RTCF_BROADCAST) && !sock_flag(sk, SOCK_BROADCAST)) {
 		ip_rt_put(rt);
 		return -EACCES;

net/ipv4/tcp_ipv4.c

diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index 5a3e7f8..47c6105 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -192,8 +192,11 @@
 			       RT_CONN_FLAGS(sk), sk->sk_bound_dev_if,
 			       IPPROTO_TCP,
 			       inet->sport, usin->sin_port, sk, 1);
-	if (tmp < 0)
+	if (tmp < 0) {
+		if (tmp == -ENETUNREACH)
+			IP_INC_STATS_BH(IPSTATS_MIB_OUTNOROUTES);
 		return tmp;
+	}
 
 	if (rt->rt_flags & (RTCF_MULTICAST | RTCF_BROADCAST)) {
 		ip_rt_put(rt);

net/ipv4/udp.c

diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index 4c7e95f..5da703e6 100644
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -722,8 +722,11 @@
 						 .dport = dport } } };
 		security_sk_classify_flow(sk, &fl);
 		err = ip_route_output_flow(&rt, &fl, sk, 1);
-		if (err)
+		if (err) {
+			if (err == -ENETUNREACH)
+				IP_INC_STATS_BH(IPSTATS_MIB_OUTNOROUTES);
 			goto out;
+		}
 
 		err = -EACCES;
 		if ((rt->rt_flags & RTCF_BROADCAST) &&