Merge branch 'master' into next

1 files changed, 13 insertions, 16 deletions

diff --git a/include/net/tcp.h b/include/net/tcp.h
index e54c76d75495..646dbe3962ea 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -41,6 +41,7 @@
 #include <net/ip.h>
 #include <net/tcp_states.h>
 #include <net/inet_ecn.h>
+#include <net/dst.h>
 
 #include <linux/seq_file.h>
 
@@ -530,6 +531,17 @@ static inline void tcp_fast_path_check(struct sock *sk)
 		tcp_fast_path_on(tp);
 }
 
+/* Compute the actual rto_min value */
+static inline u32 tcp_rto_min(struct sock *sk)
+{
+	struct dst_entry *dst = __sk_dst_get(sk);
+	u32 rto_min = TCP_RTO_MIN;
+
+	if (dst && dst_metric_locked(dst, RTAX_RTO_MIN))
+		rto_min = dst_metric_rtt(dst, RTAX_RTO_MIN);
+	return rto_min;
+}
+
 /* Compute the actual receive window we are currently advertising.
  * Rcv_nxt can be after the window if our peer push more data
  * than the offered window.
@@ -616,21 +628,6 @@ static inline int tcp_skb_mss(const struct sk_buff *skb)
 	return skb_shinfo(skb)->gso_size;
 }
 
-static inline void tcp_dec_pcount_approx_int(__u32 *count, const int decr)
-{
-	if (*count) {
-		*count -= decr;
-		if ((int)*count < 0)
-			*count = 0;
-	}
-}
-
-static inline void tcp_dec_pcount_approx(__u32 *count,
-					 const struct sk_buff *skb)
-{
-	tcp_dec_pcount_approx_int(count, tcp_skb_pcount(skb));
-}
-
 /* Events passed to congestion control interface */
 enum tcp_ca_event {
 	CA_EVENT_TX_START,	/* first transmit when no packets in flight */
@@ -910,7 +907,7 @@ static inline int tcp_prequeue(struct sock *sk, struct sk_buff *skb)
 			wake_up_interruptible(sk->sk_sleep);
 			if (!inet_csk_ack_scheduled(sk))
 				inet_csk_reset_xmit_timer(sk, ICSK_TIME_DACK,
-						          (3 * TCP_RTO_MIN) / 4,
+						          (3 * tcp_rto_min(sk)) / 4,
 							  TCP_RTO_MAX);
 		}
 		return 1;