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-rw-r--r--include/net/tcp.h13
1 files changed, 13 insertions, 0 deletions
diff --git a/include/net/tcp.h b/include/net/tcp.h
index 364426a2be5a..309801f7eb82 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -1165,6 +1165,19 @@ static inline void tcp_sack_reset(struct tcp_options_received *rx_opt)
}
u32 tcp_default_init_rwnd(u32 mss);
+void tcp_cwnd_restart(struct sock *sk, s32 delta);
+
+static inline void tcp_slow_start_after_idle_check(struct sock *sk)
+{
+ struct tcp_sock *tp = tcp_sk(sk);
+ s32 delta;
+
+ if (!sysctl_tcp_slow_start_after_idle || tp->packets_out)
+ return;
+ delta = tcp_time_stamp - tp->lsndtime;
+ if (delta > inet_csk(sk)->icsk_rto)
+ tcp_cwnd_restart(sk, delta);
+}
/* Determine a window scaling and initial window to offer. */
void tcp_select_initial_window(int __space, __u32 mss, __u32 *rcv_wnd,