path: root/include
diff options
authorIlpo Järvinen <ilpo.jarvinen@helsinki.fi>2007-02-27 10:09:49 -0800
committerDavid S. Miller <davem@sunset.davemloft.net>2007-04-25 22:23:23 -0700
commit3cfe3baaf07c9e40a75f9a70662de56df1c246a8 (patch)
tree989b2aff491b5df3aa0215f611a8c7f1360c67e9 /include
parent[TCP]: Correct reordering detection change (no FRTO case) (diff)
[TCP]: Add two new spurious RTO responses to FRTO
New sysctl tcp_frto_response is added to select amongst these responses: - Rate halving based; reuses CA_CWR state (default) - Very conservative; used to be the only one available (=1) - Undo cwr; undoes ssthresh and cwnd reductions (=2) The response with rate halving requires a new parameter to tcp_enter_cwr because FRTO has already reduced ssthresh and doing a second reduction there has to be prevented. In addition, to keep things nice on 80 cols screen, a local variable was added. Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
2 files changed, 3 insertions, 1 deletions
diff --git a/include/linux/sysctl.h b/include/linux/sysctl.h
index 98e0fd241a25..c9ccb550206f 100644
--- a/include/linux/sysctl.h
+++ b/include/linux/sysctl.h
@@ -439,6 +439,7 @@ enum
enum {
diff --git a/include/net/tcp.h b/include/net/tcp.h
index 6d09f5085f6a..f0c9e3400a09 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -220,6 +220,7 @@ extern int sysctl_tcp_app_win;
extern int sysctl_tcp_adv_win_scale;
extern int sysctl_tcp_tw_reuse;
extern int sysctl_tcp_frto;
+extern int sysctl_tcp_frto_response;
extern int sysctl_tcp_low_latency;
extern int sysctl_tcp_dma_copybreak;
extern int sysctl_tcp_nometrics_save;
@@ -738,7 +739,7 @@ static inline void tcp_sync_left_out(struct tcp_sock *tp)
tp->left_out = tp->sacked_out + tp->lost_out;
-extern void tcp_enter_cwr(struct sock *sk);
+extern void tcp_enter_cwr(struct sock *sk, const int set_ssthresh);
extern __u32 tcp_init_cwnd(struct tcp_sock *tp, struct dst_entry *dst);
/* Slow start with delack produces 3 packets of burst, so that