diff options
| -rw-r--r-- | include/net/tcp.h | 22 | ||||
| -rw-r--r-- | net/ipv4/tcp_cong.c | 21 |
2 files changed, 22 insertions, 21 deletions
diff --git a/include/net/tcp.h b/include/net/tcp.h index 306580ce1e5..7de4ea3a04d 100644 --- a/include/net/tcp.h +++ b/include/net/tcp.h @@ -786,27 +786,7 @@ static inline u32 tcp_wnd_end(const struct tcp_sock *tp) { return tp->snd_una + tp->snd_wnd; } - -/* RFC2861 Check whether we are limited by application or congestion window - * This is the inverse of cwnd check in tcp_tso_should_defer - */ -static inline int tcp_is_cwnd_limited(const struct sock *sk, u32 in_flight) -{ - const struct tcp_sock *tp = tcp_sk(sk); - u32 left; - - if (in_flight >= tp->snd_cwnd) - return 1; - - if (!sk_can_gso(sk)) - return 0; - - left = tp->snd_cwnd - in_flight; - if (sysctl_tcp_tso_win_divisor) - return left * sysctl_tcp_tso_win_divisor < tp->snd_cwnd; - else - return left <= tcp_max_burst(tp); -} +extern int tcp_is_cwnd_limited(const struct sock *sk, u32 in_flight); static inline void tcp_minshall_update(struct tcp_sock *tp, unsigned int mss, const struct sk_buff *skb) diff --git a/net/ipv4/tcp_cong.c b/net/ipv4/tcp_cong.c index 4451750b478..3a6be23d222 100644 --- a/net/ipv4/tcp_cong.c +++ b/net/ipv4/tcp_cong.c @@ -274,6 +274,27 @@ int tcp_set_congestion_control(struct sock *sk, const char *name) return err; } +/* RFC2861 Check whether we are limited by application or congestion window + * This is the inverse of cwnd check in tcp_tso_should_defer + */ +int tcp_is_cwnd_limited(const struct sock *sk, u32 in_flight) +{ + const struct tcp_sock *tp = tcp_sk(sk); + u32 left; + + if (in_flight >= tp->snd_cwnd) + return 1; + + if (!sk_can_gso(sk)) + return 0; + + left = tp->snd_cwnd - in_flight; + if (sysctl_tcp_tso_win_divisor) + return left * sysctl_tcp_tso_win_divisor < tp->snd_cwnd; + else + return left <= tcp_max_burst(tp); +} +EXPORT_SYMBOL_GPL(tcp_is_cwnd_limited); /* * Slow start is used when congestion window is less than slow start |