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tcp: fix stretch ACK bugs in BIC

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Changes BIC to properly handle stretch ACKs in additive
increase mode by passing in the count of ACKed packets
to tcp_cong_avoid_ai().

Signed-off-by: Pengcheng Yang <yangpc@wangsu.com>
Acked-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Pengcheng Yang
2020-03-16 14:35:07 +08:00
committed by David S. Miller
parent 86e85bf698
commit be0d935ebf
1 changed files with 6 additions and 5 deletions
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11
net/ipv4/tcp_bic.c
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@@ -145,12 +145,13 @@ static void bictcp_cong_avoid(struct sock *sk, u32 ack, u32 acked)
if (!tcp_is_cwnd_limited(sk)) if (!tcp_is_cwnd_limited(sk))
return; return;
if (tcp_in_slow_start(tp)) if (tcp_in_slow_start(tp)) {
tcp_slow_start(tp, acked); acked = tcp_slow_start(tp, acked);
else { if (!acked)
bictcp_update(ca, tp->snd_cwnd); return;
tcp_cong_avoid_ai(tp, ca->cnt, 1);
} }
bictcp_update(ca, tp->snd_cwnd);
tcp_cong_avoid_ai(tp, ca->cnt, acked);
} }
/* /*