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tcp: account all retransmit failures

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Change snmp RETRANSFAILS stat to include timeout retransmit failures
in addition to other loss recoveries.

Signed-off-by: Yuchung Cheng <ycheng@google.com>
Acked-by: Neal Cardwell <ncardwell@google.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Yuchung Cheng 2013-07-12 11:33:04 -07:00 committed by David S. Miller
parent e76385240e
commit 24ab6bec80
1 changed files with 4 additions and 3 deletions
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7
net/ipv4/tcp_output.c
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@ -2407,6 +2407,8 @@ int tcp_retransmit_skb(struct sock *sk, struct sk_buff *skb)
* see tcp_input.c tcp_sacktag_write_queue(). * see tcp_input.c tcp_sacktag_write_queue().
*/ */
TCP_SKB_CB(skb)->ack_seq = tp->snd_nxt; TCP_SKB_CB(skb)->ack_seq = tp->snd_nxt;
} else {
NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_TCPRETRANSFAIL);
} }
return err; return err;
} }
@ -2528,10 +2530,9 @@ void tcp_xmit_retransmit_queue(struct sock *sk)
if (sacked & (TCPCB_SACKED_ACKED|TCPCB_SACKED_RETRANS)) if (sacked & (TCPCB_SACKED_ACKED|TCPCB_SACKED_RETRANS))
continue; continue;
if (tcp_retransmit_skb(sk, skb)) { if (tcp_retransmit_skb(sk, skb))
NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_TCPRETRANSFAIL);
return; return;
}
NET_INC_STATS_BH(sock_net(sk), mib_idx); NET_INC_STATS_BH(sock_net(sk), mib_idx);
if (tcp_in_cwnd_reduction(sk)) if (tcp_in_cwnd_reduction(sk))