From: Ilpo Järvinen Date: Thu, 22 Feb 2007 07:14:42 +0000 (-0800) Subject: [TCP]: Prevent reordering adjustments during FRTO X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=288035f915686a9a9e85e0358c5392bb5d7ae58d;p=openwrt%2Fstaging%2Fblogic.git [TCP]: Prevent reordering adjustments during FRTO To be honest, I'm not too sure how the reord stuff works in the first place but this seems necessary. When FRTO has been active, the one and only retransmission could be unnecessary but the state and sending order might not be what the sacktag code expects it to be (to work correctly). Signed-off-by: Ilpo Järvinen Signed-off-by: David S. Miller --- diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c index 055721d8495e..df516d4eca96 100644 --- a/net/ipv4/tcp_input.c +++ b/net/ipv4/tcp_input.c @@ -1224,7 +1224,8 @@ tcp_sacktag_write_queue(struct sock *sk, struct sk_buff *ack_skb, u32 prior_snd_ tp->left_out = tp->sacked_out + tp->lost_out; - if ((reord < tp->fackets_out) && icsk->icsk_ca_state != TCP_CA_Loss) + if ((reord < tp->fackets_out) && icsk->icsk_ca_state != TCP_CA_Loss && + (tp->frto_highmark && after(tp->snd_una, tp->frto_highmark))) tcp_update_reordering(sk, ((tp->fackets_out + 1) - reord), 0); #if FASTRETRANS_DEBUG > 0