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tcp: make tcp_cwnd_application_limited() static

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Make tcp_cwnd_application_limited() static and move it from tcp_input.c to
tcp_output.c

Signed-off-by: Weiping Pan <wpan@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Weiping Pan
2014-04-18 12:27:46 +08:00
committed by David S. Miller
parent 17d8ecb8ff
commit 86fd14ad1e
3 changed files with 22 additions and 23 deletions
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22
net/ipv4/tcp_output.c
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@@ -1387,6 +1387,28 @@ unsigned int tcp_current_mss(struct sock *sk)
return mss_now;
}
/* RFC2861, slow part. Adjust cwnd, after it was not full during one rto.
* As additional protections, we do not touch cwnd in retransmission phases,
* and if application hit its sndbuf limit recently.
*/
static void tcp_cwnd_application_limited(struct sock *sk)
{
struct tcp_sock *tp = tcp_sk(sk);
if (inet_csk(sk)->icsk_ca_state == TCP_CA_Open &&
sk->sk_socket && !test_bit(SOCK_NOSPACE, &sk->sk_socket->flags)) {
/* Limited by application or receiver window. */
u32 init_win = tcp_init_cwnd(tp, __sk_dst_get(sk));
u32 win_used = max(tp->snd_cwnd_used, init_win);
if (win_used < tp->snd_cwnd) {
tp->snd_ssthresh = tcp_current_ssthresh(sk);
tp->snd_cwnd = (tp->snd_cwnd + win_used) >> 1;
}
tp->snd_cwnd_used = 0;
}
tp->snd_cwnd_stamp = tcp_time_stamp;
}
/* Congestion window validation. (RFC2861) */
static void tcp_cwnd_validate(struct sock *sk)
{