TCP: avoid to send keepalive probes if receiving data

[deliverable/linux.git] / net / ipv4 / tcp_timer.c

diff --git a/net/ipv4/tcp_timer.c b/net/ipv4/tcp_timer.c
index b2e6bbccaee17eef52a3aca0466db51f89ea0d48..440a5c6004f6ac8d1b2d8404d641d0a174b241b4 100644 (file)
--- a/net/ipv4/tcp_timer.c
+++ b/net/ipv4/tcp_timer.c
@@ -19,6 +19,7 @@
  */
 
 #include <linux/module.h>
+#include <linux/gfp.h>
 #include <net/tcp.h>
 
 int sysctl_tcp_syn_retries __read_mostly = TCP_SYN_RETRIES;
@@ -171,14 +172,14 @@ static int tcp_write_timeout(struct sock *sk)
 
        if ((1 << sk->sk_state) & (TCPF_SYN_SENT | TCPF_SYN_RECV)) {
                if (icsk->icsk_retransmits)
-                       dst_negative_advice(&sk->sk_dst_cache, sk);
+                       dst_negative_advice(sk);
                retry_until = icsk->icsk_syn_retries ? : sysctl_tcp_syn_retries;
        } else {
                if (retransmits_timed_out(sk, sysctl_tcp_retries1)) {
                        /* Black hole detection */
                        tcp_mtu_probing(icsk, sk);
 
-                       dst_negative_advice(&sk->sk_dst_cache, sk);
+                       dst_negative_advice(sk);
                }
 
                retry_until = sysctl_tcp_retries2;
@@ -516,7 +517,7 @@ static void tcp_keepalive_timer (unsigned long data)
        struct sock *sk = (struct sock *) data;
        struct inet_connection_sock *icsk = inet_csk(sk);
        struct tcp_sock *tp = tcp_sk(sk);
-       __u32 elapsed;
+       u32 elapsed;
 
        /* Only process if socket is not in use. */
        bh_lock_sock(sk);
@@ -553,7 +554,7 @@ static void tcp_keepalive_timer (unsigned long data)
        if (tp->packets_out || tcp_send_head(sk))
                goto resched;
 
-       elapsed = tcp_time_stamp - tp->rcv_tstamp;
+       elapsed = keepalive_time_elapsed(tp);
 
        if (elapsed >= keepalive_time_when(tp)) {
                if (icsk->icsk_probes_out >= keepalive_probes(tp)) {