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Diffstat (limited to 'net/ipv4/tcp_highspeed.c')
-rw-r--r--net/ipv4/tcp_highspeed.c11
1 files changed, 10 insertions, 1 deletions
diff --git a/net/ipv4/tcp_highspeed.c b/net/ipv4/tcp_highspeed.c
index db78424..6d9879e 100644
--- a/net/ipv4/tcp_highspeed.c
+++ b/net/ipv4/tcp_highspeed.c
@@ -94,6 +94,7 @@ static const struct hstcp_aimd_val {
struct hstcp {
u32 ai;
+ u32 loss_cwnd;
};
static void hstcp_init(struct sock *sk)
@@ -150,16 +151,24 @@ static void hstcp_cong_avoid(struct sock *sk, u32 ack, u32 acked)
static u32 hstcp_ssthresh(struct sock *sk)
{
const struct tcp_sock *tp = tcp_sk(sk);
- const struct hstcp *ca = inet_csk_ca(sk);
+ struct hstcp *ca = inet_csk_ca(sk);
+ ca->loss_cwnd = tp->snd_cwnd;
/* Do multiplicative decrease */
return max(tp->snd_cwnd - ((tp->snd_cwnd * hstcp_aimd_vals[ca->ai].md) >> 8), 2U);
}
+static u32 hstcp_cwnd_undo(struct sock *sk)
+{
+ const struct hstcp *ca = inet_csk_ca(sk);
+
+ return max(tcp_sk(sk)->snd_cwnd, ca->loss_cwnd);
+}
static struct tcp_congestion_ops tcp_highspeed __read_mostly = {
.init = hstcp_init,
.ssthresh = hstcp_ssthresh,
+ .undo_cwnd = hstcp_cwnd_undo,
.cong_avoid = hstcp_cong_avoid,
.owner = THIS_MODULE,
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