[TCP] FRTO: Moved tcp_use_frto from tcp.h to tcp_input.c
In addition, removed inline.
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index c5be3d0..fe96e17 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -1236,6 +1236,19 @@
return flag;
}
+int tcp_use_frto(const struct sock *sk)
+{
+ const struct tcp_sock *tp = tcp_sk(sk);
+
+ /* F-RTO must be activated in sysctl and there must be some
+ * unsent new data, and the advertised window should allow
+ * sending it.
+ */
+ return (sysctl_tcp_frto && sk->sk_send_head &&
+ !after(TCP_SKB_CB(sk->sk_send_head)->end_seq,
+ tp->snd_una + tp->snd_wnd));
+}
+
/* RTO occurred, but do not yet enter loss state. Instead, transmit two new
* segments to see from the next ACKs whether any data was really missing.
* If the RTO was spurious, new ACKs should arrive.