Commit 0a9f2a46 authored by Ilpo Järvinen's avatar Ilpo Järvinen Committed by David S. Miller
Browse files

[TCP]: Verify the presence of RETRANS bit when leaving FRTO 



For yet unknown reason, something cleared SACKED_RETRANS bit
underneath FRTO.

Signed-off-by: default avatarIlpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 063ed369

net/ipv4/tcp_input.c

+3 −1
Original line number Diff line number Diff line
@@ -1398,6 +1398,8 @@ static void tcp_enter_frto_loss(struct sock *sk, int allowed_segments, int flag) 
		 * waiting for the first ACK and did not get it)...

		 */

		if ((tp->frto_counter == 1) && !(flag&FLAG_DATA_ACKED)) {

			/* For some reason this R-bit might get cleared? */

			if (TCP_SKB_CB(skb)->sacked & TCPCB_SACKED_RETRANS)

				tp->retrans_out += tcp_skb_pcount(skb);

			/* ...enter this if branch just for the first segment */

			flag |= FLAG_DATA_ACKED;