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net: Add MIB counters for checksum errors

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Add MIB counters for checksum errors in IP layer,
and TCP/UDP/ICMP layers, to help diagnose problems.

$ nstat -a | grep  Csum
IcmpInCsumErrors                72                 0.0
TcpInCsumErrors                 382                0.0
UdpInCsumErrors                 463221             0.0
Icmp6InCsumErrors               75                 0.0
Udp6InCsumErrors                173442             0.0
IpExtInCsumErrors               10884              0.0

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2013-04-29 08:39:56 +00:00 • committed by David S. Miller
commit 6a5dc9e598
12 changed files with 72 additions and 28 deletions
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3
net/ipv4/tcp_output.c
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@ -80,8 +80,9 @@ static void tcp_event_new_data_sent(struct sock *sk, const struct sk_buff *skb)
tp->packets_out += tcp_skb_pcount(skb);
if (!prior_packets || icsk->icsk_pending == ICSK_TIME_EARLY_RETRANS ||
icsk->icsk_pending == ICSK_TIME_LOSS_PROBE)
icsk->icsk_pending == ICSK_TIME_LOSS_PROBE) {
tcp_rearm_rto(sk);
}
}
/* SND.NXT, if window was not shrunk.