tcp: move tcp_enter_cwr()

To prepare replacing rate halving with PRR algorithm in CWR state.

Signed-off-by: Yuchung Cheng <ycheng@google.com>
Acked-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 23 insertions, 23 deletions

diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index 8c304a40079..3ab0c7573a0 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -743,29 +743,6 @@ __u32 tcp_init_cwnd(const struct tcp_sock *tp, const struct dst_entry *dst)
         return min_t(__u32, cwnd, tp->snd_cwnd_clamp);
 }
 
-/* Set slow start threshold and cwnd not falling to slow start */
-void tcp_enter_cwr(struct sock *sk, const int set_ssthresh)
-{
-        struct tcp_sock *tp = tcp_sk(sk);
-        const struct inet_connection_sock *icsk = inet_csk(sk);
-
-        tp->prior_ssthresh = 0;
-        tp->bytes_acked = 0;
-        if (icsk->icsk_ca_state < TCP_CA_CWR) {
-                tp->undo_marker = 0;
-                if (set_ssthresh)
-                        tp->snd_ssthresh = icsk->icsk_ca_ops->ssthresh(sk);
-                tp->snd_cwnd = min(tp->snd_cwnd,
-                                   tcp_packets_in_flight(tp) + 1U);
-                tp->snd_cwnd_cnt = 0;
-                tp->high_seq = tp->snd_nxt;
-                tp->snd_cwnd_stamp = tcp_time_stamp;
-                TCP_ECN_queue_cwr(tp);
-
-                tcp_set_ca_state(sk, TCP_CA_CWR);
-        }
-}
-
 /*
  * Packet counting of FACK is based on in-order assumptions, therefore TCP
  * disables it when reordering is detected
@@ -2741,6 +2718,29 @@ static inline void tcp_complete_cwr(struct sock *sk)
         tcp_ca_event(sk, CA_EVENT_COMPLETE_CWR);
 }
 
+/* Set slow start threshold and cwnd not falling to slow start */
+void tcp_enter_cwr(struct sock *sk, const int set_ssthresh)
+{
+        struct tcp_sock *tp = tcp_sk(sk);
+        const struct inet_connection_sock *icsk = inet_csk(sk);
+
+        tp->prior_ssthresh = 0;
+        tp->bytes_acked = 0;
+        if (icsk->icsk_ca_state < TCP_CA_CWR) {
+                tp->undo_marker = 0;
+                if (set_ssthresh)
+                        tp->snd_ssthresh = icsk->icsk_ca_ops->ssthresh(sk);
+                tp->snd_cwnd = min(tp->snd_cwnd,
+                                   tcp_packets_in_flight(tp) + 1U);
+                tp->snd_cwnd_cnt = 0;
+                tp->high_seq = tp->snd_nxt;
+                tp->snd_cwnd_stamp = tcp_time_stamp;
+                TCP_ECN_queue_cwr(tp);
+
+                tcp_set_ca_state(sk, TCP_CA_CWR);
+        }
+}
+
 static void tcp_try_keep_open(struct sock *sk)
 {
         struct tcp_sock *tp = tcp_sk(sk);