diff options
Diffstat (limited to 'net/ipv4/tcp_highspeed.c')
| -rw-r--r-- | net/ipv4/tcp_highspeed.c | 36 |
1 files changed, 8 insertions, 28 deletions
diff --git a/net/ipv4/tcp_highspeed.c b/net/ipv4/tcp_highspeed.c index c4fc811bf37..1c4908280d9 100644 --- a/net/ipv4/tcp_highspeed.c +++ b/net/ipv4/tcp_highspeed.c @@ -14,8 +14,8 @@ * with fixed-point MD scaled <<8. */ static const struct hstcp_aimd_val { - unsigned int cwnd; - unsigned int md; + unsigned int cwnd; + unsigned int md; } hstcp_aimd_vals[] = { { 38, 128, /* 0.50 */ }, { 118, 112, /* 0.44 */ }, @@ -97,10 +97,6 @@ struct hstcp { u32 ai; }; -static int max_ssthresh = 100; -module_param(max_ssthresh, int, 0644); -MODULE_PARM_DESC(max_ssthresh, "limited slow start threshold (RFC3742)"); - static void hstcp_init(struct sock *sk) { struct tcp_sock *tp = tcp_sk(sk); @@ -113,32 +109,17 @@ static void hstcp_init(struct sock *sk) tp->snd_cwnd_clamp = min_t(u32, tp->snd_cwnd_clamp, 0xffffffff/128); } -static void hstcp_cong_avoid(struct sock *sk, u32 adk, u32 rtt, - u32 in_flight, int data_acked) +static void hstcp_cong_avoid(struct sock *sk, u32 ack, u32 acked) { struct tcp_sock *tp = tcp_sk(sk); struct hstcp *ca = inet_csk_ca(sk); - if (!tcp_is_cwnd_limited(sk, in_flight)) + if (!tcp_is_cwnd_limited(sk)) return; - if (tp->snd_cwnd <= tp->snd_ssthresh) { - /* RFC3742: limited slow start - * the window is increased by 1/K MSS for each arriving ACK, - * for K = int(cwnd/(0.5 max_ssthresh)) - */ - if (max_ssthresh > 0 && tp->snd_cwnd > max_ssthresh) { - u32 k = max(tp->snd_cwnd / (max_ssthresh >> 1), 1U); - if (++tp->snd_cwnd_cnt >= k) { - if (tp->snd_cwnd < tp->snd_cwnd_clamp) - tp->snd_cwnd++; - tp->snd_cwnd_cnt = 0; - } - } else { - if (tp->snd_cwnd < tp->snd_cwnd_clamp) - tp->snd_cwnd++; - } - } else { + if (tp->snd_cwnd <= tp->snd_ssthresh) + tcp_slow_start(tp, acked); + else { /* Update AIMD parameters. * * We want to guarantee that: @@ -177,11 +158,10 @@ static u32 hstcp_ssthresh(struct sock *sk) } -static struct tcp_congestion_ops tcp_highspeed = { +static struct tcp_congestion_ops tcp_highspeed __read_mostly = { .init = hstcp_init, .ssthresh = hstcp_ssthresh, .cong_avoid = hstcp_cong_avoid, - .min_cwnd = tcp_reno_min_cwnd, .owner = THIS_MODULE, .name = "highspeed" |