[PATCH net 2/3] tcp: fix SNMP under-estimation on failed retransmission

[Yuchung Cheng]

Previously the SNMP counter LINUX_MIB_TCPRETRANSFAIL is not counting
the TSO/GSO properly on failed retransmission. This patch fixes that.

Signed-off-by: Yuchung Cheng <ych...@google.com>
Signed-off-by: Eric Dumazet <eduma...@google.com>
Signed-off-by: Neal Cardwell <ncardw...@google.com>
---
 net/ipv4/tcp_output.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index c5dc4c4fdadd..87bd1c61f4bf 100644
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -2929,7 +2929,7 @@ int __tcp_retransmit_skb(struct sock *sk, struct sk_buff 
*skb, int segs)
                TCP_SKB_CB(skb)->sacked |= TCPCB_EVER_RETRANS;
                trace_tcp_retransmit_skb(sk, skb);
        } else if (err != -EBUSY) {
-               NET_INC_STATS(sock_net(sk), LINUX_MIB_TCPRETRANSFAIL);
+               NET_ADD_STATS(sock_net(sk), LINUX_MIB_TCPRETRANSFAIL, segs);
        }
        return err;
 }
-- 
2.20.0.rc0.387.gc7a69e6b6c-goog