From 30cfd0baf0a0c4329fff1ef4b622919297969ec8 Mon Sep 17 00:00:00 2001 From: Stephen Hemminger Date: Wed, 25 Jul 2007 23:49:34 -0700 Subject: [TCP]: congestion control API pass RTT in microseconds This patch changes the API for the callback that is done after an ACK is received. It solves a couple of issues: * Some congestion controls want higher resolution value of RTT (controlled by TCP_CONG_RTT_SAMPLE flag). These don't really want a ktime, but all compute a RTT in microseconds. * Other congestion control could use RTT at jiffies resolution. To keep API consistent the units should be the same for both cases, just the resolution should change. Signed-off-by: Stephen Hemminger Signed-off-by: David S. Miller --- include/net/tcp.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include/net/tcp.h') diff --git a/include/net/tcp.h b/include/net/tcp.h index 8b404b1ef7c..c209361ab74 100644 --- a/include/net/tcp.h +++ b/include/net/tcp.h @@ -660,7 +660,7 @@ struct tcp_congestion_ops { /* new value of cwnd after loss (optional) */ u32 (*undo_cwnd)(struct sock *sk); /* hook for packet ack accounting (optional) */ - void (*pkts_acked)(struct sock *sk, u32 num_acked, ktime_t last); + void (*pkts_acked)(struct sock *sk, u32 num_acked, s32 rtt_us); /* get info for inet_diag (optional) */ void (*get_info)(struct sock *sk, u32 ext, struct sk_buff *skb); -- cgit v1.2.3