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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
parent f233a976ad
commit 6a5dc9e598
12 changed files with 72 additions and 28 deletions
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4
net/ipv4/icmp.c
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@@ -881,7 +881,7 @@ int icmp_rcv(struct sk_buff *skb)
case CHECKSUM_NONE:
skb->csum = 0;
if (__skb_checksum_complete(skb))
goto error;
goto csum_error;
}
if (!pskb_pull(skb, sizeof(*icmph)))
@@ -929,6 +929,8 @@ int icmp_rcv(struct sk_buff *skb)
drop:
kfree_skb(skb);
return 0;
csum_error:
ICMP_INC_STATS_BH(net, ICMP_MIB_CSUMERRORS);
error:
ICMP_INC_STATS_BH(net, ICMP_MIB_INERRORS);
goto drop;