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tcp: replace cnt & rtt with struct in pkts_acked()

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Replace 2 arguments (cnt and rtt) in the congestion control modules'
pkts_acked() function with a struct. This will allow adding more
information without having to modify existing congestion control
modules (tcp_nv in particular needs bytes in flight when packet
was sent).

As proposed by Neal Cardwell in his comments to the tcp_nv patch.

Signed-off-by: Lawrence Brakmo <brakmo@fb.com>
Acked-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Lawrence Brakmo
2016-05-11 10:02:13 -07:00
committed by David S. Miller
parent cf88585b1d
commit 756ee1729b
13 changed files with 60 additions and 47 deletions
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6
net/ipv4/tcp_vegas.c
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@@ -107,16 +107,16 @@ EXPORT_SYMBOL_GPL(tcp_vegas_init);
* o min-filter RTT samples from a much longer window (forever for now)
* to find the propagation delay (baseRTT)
*/
void tcp_vegas_pkts_acked(struct sock *sk, u32 cnt, s32 rtt_us)
void tcp_vegas_pkts_acked(struct sock *sk, const struct ack_sample *sample)
{
struct vegas *vegas = inet_csk_ca(sk);
u32 vrtt;
if (rtt_us < 0)
if (sample->rtt_us < 0)
return;
/* Never allow zero rtt or baseRTT */
vrtt = rtt_us + 1;
vrtt = sample->rtt_us + 1;
/* Filter to find propagation delay: */
if (vrtt < vegas->baseRTT)