tcp: add SACK compression

[linux-block.git] / net / ipv4 / tcp_output.c

diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index 0d8f950a9006598c70dbf51e281a3fe32dfaa234..7ee98aad82b758674ca7f3e90bd3fc165e8fcd45 100644 (file)
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -162,6 +162,13 @@ static void tcp_event_data_sent(struct tcp_sock *tp,
 /* Account for an ACK we sent. */
 static inline void tcp_event_ack_sent(struct sock *sk, unsigned int pkts)
 {
+       struct tcp_sock *tp = tcp_sk(sk);
+
+       if (unlikely(tp->compressed_ack)) {
+               tp->compressed_ack = 0;
+               if (hrtimer_try_to_cancel(&tp->compressed_ack_timer) == 1)
+                       __sock_put(sk);
+       }
        tcp_dec_quickack_mode(sk, pkts);
        inet_csk_clear_xmit_timer(sk, ICSK_TIME_DACK);
 }