From ecde8f36f8a05a023b9d026e9094571aab421d36 Mon Sep 17 00:00:00 2001 From: Yuchung Cheng Date: Tue, 4 Apr 2017 14:15:39 -0700 Subject: [PATCH] tcp: fix lost retransmit SNMP under-counting The lost retransmit SNMP stat is under-counting retransmission that uses segment offloading. This patch fixes that so all retransmission related SNMP counters are consistent. Fixes: 10d3be569243 ("tcp-tso: do not split TSO packets at retransmit time") Signed-off-by: Yuchung Cheng Signed-off-by: Eric Dumazet Signed-off-by: Neal Cardwell Signed-off-by: Soheil Hassas Yeganeh Signed-off-by: David S. Miller --- net/ipv4/tcp_recovery.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/net/ipv4/tcp_recovery.c b/net/ipv4/tcp_recovery.c index 4ecb38a..d8acbd9 100644 --- a/net/ipv4/tcp_recovery.c +++ b/net/ipv4/tcp_recovery.c @@ -12,7 +12,8 @@ static void tcp_rack_mark_skb_lost(struct sock *sk, struct sk_buff *skb) /* Account for retransmits that are lost again */ TCP_SKB_CB(skb)->sacked &= ~TCPCB_SACKED_RETRANS; tp->retrans_out -= tcp_skb_pcount(skb); - NET_INC_STATS(sock_net(sk), LINUX_MIB_TCPLOSTRETRANSMIT); + NET_ADD_STATS(sock_net(sk), LINUX_MIB_TCPLOSTRETRANSMIT, + tcp_skb_pcount(skb)); } } -- 2.7.4