diff options
| -rw-r--r-- | include/net/tcp.h | 21 | ||||
| -rw-r--r-- | net/ipv4/tcp_bic.c | 2 | ||||
| -rw-r--r-- | net/ipv4/tcp_cong.c | 2 | ||||
| -rw-r--r-- | net/ipv4/tcp_highspeed.c | 4 | ||||
| -rw-r--r-- | net/ipv4/tcp_htcp.c | 2 | ||||
| -rw-r--r-- | net/ipv4/tcp_hybla.c | 6 | ||||
| -rw-r--r-- | net/ipv4/tcp_output.c | 1 | ||||
| -rw-r--r-- | net/ipv4/tcp_scalable.c | 3 |
8 files changed, 32 insertions, 9 deletions
diff --git a/include/net/tcp.h b/include/net/tcp.h index 96cc3b434e4..15bdbc6bd57 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) return 3; } +/* 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->sk_route_caps & NETIF_F_TSO)) + 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); +} + static __inline__ void tcp_minshall_update(struct tcp_sock *tp, int mss, const struct sk_buff *skb) { diff --git a/net/ipv4/tcp_bic.c b/net/ipv4/tcp_bic.c index ae35e060904..5af99b3ef5d 100644 --- a/net/ipv4/tcp_bic.c +++ b/net/ipv4/tcp_bic.c @@ -217,7 +217,7 @@ static void bictcp_cong_avoid(struct sock *sk, u32 ack, bictcp_low_utilization(sk, data_acked); - if (in_flight < tp->snd_cwnd) + if (!tcp_is_cwnd_limited(sk, in_flight)) return; if (tp->snd_cwnd <= tp->snd_ssthresh) { diff --git a/net/ipv4/tcp_cong.c b/net/ipv4/tcp_cong.c index bbf2d6624e8..0705b496c6b 100644 --- a/net/ipv4/tcp_cong.c +++ b/net/ipv4/tcp_cong.c @@ -186,7 +186,7 @@ void tcp_reno_cong_avoid(struct sock *sk, u32 ack, u32 rtt, u32 in_flight, { struct tcp_sock *tp = tcp_sk(sk); - if (in_flight < tp->snd_cwnd) + if (!tcp_is_cwnd_limited(sk, in_flight)) return; if (tp->snd_cwnd <= tp->snd_ssthresh) { diff --git a/net/ipv4/tcp_highspeed.c b/net/ipv4/tcp_highspeed.c index 6acc04bde08..5e56ad368dd 100644 --- a/net/ipv4/tcp_highspeed.c +++ b/net/ipv4/tcp_highspeed.c @@ -111,12 +111,12 @@ static void hstcp_init(struct sock *sk) } static void hstcp_cong_avoid(struct sock *sk, u32 adk, u32 rtt, - u32 in_flight, int good) + u32 in_flight, u32 pkts_acked) { struct tcp_sock *tp = tcp_sk(sk); struct hstcp *ca = inet_csk_ca(sk); - if (in_flight < tp->snd_cwnd) + if (!tcp_is_cwnd_limited(sk, in_flight)) return; if (tp->snd_cwnd <= tp->snd_ssthresh) { diff --git a/net/ipv4/tcp_htcp.c b/net/ipv4/tcp_htcp.c index e47b37984e9..404a326ba34 100644 --- a/net/ipv4/tcp_htcp.c +++ b/net/ipv4/tcp_htcp.c @@ -207,7 +207,7 @@ static void htcp_cong_avoid(struct sock *sk, u32 ack, u32 rtt, struct tcp_sock *tp = tcp_sk(sk); struct htcp *ca = inet_csk_ca(sk); - if (in_flight < tp->snd_cwnd) + if (!tcp_is_cwnd_limited(sk, in_flight)) return; if (tp->snd_cwnd <= tp->snd_ssthresh) { diff --git a/net/ipv4/tcp_hybla.c b/net/ipv4/tcp_hybla.c index 77add63623d..40dbb387751 100644 --- a/net/ipv4/tcp_hybla.c +++ b/net/ipv4/tcp_hybla.c @@ -100,12 +100,12 @@ static void hybla_cong_avoid(struct sock *sk, u32 ack, u32 rtt, ca->minrtt = tp->srtt; } + if (!tcp_is_cwnd_limited(sk, in_flight)) + return; + if (!ca->hybla_en) return tcp_reno_cong_avoid(sk, ack, rtt, in_flight, flag); - if (in_flight < tp->snd_cwnd) - return; - if (ca->rho == 0) hybla_recalc_param(sk); diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c index b907456a79f..998f6416ef8 100644 --- a/net/ipv4/tcp_output.c +++ b/net/ipv4/tcp_output.c @@ -2058,3 +2058,4 @@ EXPORT_SYMBOL(tcp_connect); EXPORT_SYMBOL(tcp_make_synack); EXPORT_SYMBOL(tcp_simple_retransmit); EXPORT_SYMBOL(tcp_sync_mss); +EXPORT_SYMBOL(sysctl_tcp_tso_win_divisor); diff --git a/net/ipv4/tcp_scalable.c b/net/ipv4/tcp_scalable.c index 327770bf552..a2fd25617d2 100644 --- a/net/ipv4/tcp_scalable.c +++ b/net/ipv4/tcp_scalable.c @@ -20,7 +20,8 @@ static void tcp_scalable_cong_avoid(struct sock *sk, u32 ack, u32 rtt, u32 in_flight, int flag) { struct tcp_sock *tp = tcp_sk(sk); - if (in_flight < tp->snd_cwnd) + + if (!tcp_is_cwnd_limited(sk, in_flight)) return; if (tp->snd_cwnd <= tp->snd_ssthresh) { |