aboutsummaryrefslogtreecommitdiffstats
path: root/include
diff options
context:
space:
mode:
Diffstat (limited to 'include')
-rw-r--r--include/net/tcp.h21
1 files changed, 21 insertions, 0 deletions
diff --git a/include/net/tcp.h b/include/net/tcp.h
index 96cc3b434e40..15bdbc6bd571 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -810,6 +810,27 @@ static __inline__ __u32 tcp_max_burst(const struct tcp_sock *tp)
810 return 3; 810 return 3;
811} 811}
812 812
813/* RFC2861 Check whether we are limited by application or congestion window
814 * This is the inverse of cwnd check in tcp_tso_should_defer
815 */
816static inline int tcp_is_cwnd_limited(const struct sock *sk, u32 in_flight)
817{
818 const struct tcp_sock *tp = tcp_sk(sk);
819 u32 left;
820
821 if (in_flight >= tp->snd_cwnd)
822 return 1;
823
824 if (!(sk->sk_route_caps & NETIF_F_TSO))
825 return 0;
826
827 left = tp->snd_cwnd - in_flight;
828 if (sysctl_tcp_tso_win_divisor)
829 return left * sysctl_tcp_tso_win_divisor < tp->snd_cwnd;
830 else
831 return left <= tcp_max_burst(tp);
832}
833
813static __inline__ void tcp_minshall_update(struct tcp_sock *tp, int mss, 834static __inline__ void tcp_minshall_update(struct tcp_sock *tp, int mss,
814 const struct sk_buff *skb) 835 const struct sk_buff *skb)
815{ 836{