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| author | Eric Dumazet <edumazet@google.com> | 2013-04-29 08:39:56 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-04-29 15:14:03 -0400 |
| commit | 6a5dc9e598fe90160fee7de098fa319665f5253e (patch) | |
| tree | 7f2c2130e3dec81aea01e997cec7e87744f02694 /net/ipv6/tcp_ipv6.c | |
| parent | f233a976ad15c3b8c54c0157f3c41d23f7514279 (diff) | |
| download | op-kernel-dev-6a5dc9e598fe90160fee7de098fa319665f5253e.zip op-kernel-dev-6a5dc9e598fe90160fee7de098fa319665f5253e.tar.gz | |
net: Add MIB counters for checksum errors
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>
Diffstat (limited to 'net/ipv6/tcp_ipv6.c')
| -rw-r--r-- | net/ipv6/tcp_ipv6.c | 19 |
1 files changed, 10 insertions, 9 deletions
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c index e51bd1a..7116706 100644 --- a/net/ipv6/tcp_ipv6.c +++ b/net/ipv6/tcp_ipv6.c @@ -1405,6 +1405,7 @@ discard: kfree_skb(skb); return 0; csum_err: + TCP_INC_STATS_BH(sock_net(sk), TCP_MIB_CSUMERRORS); TCP_INC_STATS_BH(sock_net(sk), TCP_MIB_INERRS); goto discard; @@ -1466,7 +1467,7 @@ static int tcp_v6_rcv(struct sk_buff *skb) goto discard_it; if (!skb_csum_unnecessary(skb) && tcp_v6_checksum_init(skb)) - goto bad_packet; + goto csum_error; th = tcp_hdr(skb); hdr = ipv6_hdr(skb); @@ -1530,6 +1531,8 @@ no_tcp_socket: goto discard_it; if (skb->len < (th->doff<<2) || tcp_checksum_complete(skb)) { +csum_error: + TCP_INC_STATS_BH(net, TCP_MIB_CSUMERRORS); bad_packet: TCP_INC_STATS_BH(net, TCP_MIB_INERRS); } else { @@ -1537,11 +1540,6 @@ bad_packet: } discard_it: - - /* - * Discard frame - */ - kfree_skb(skb); return 0; @@ -1555,10 +1553,13 @@ do_time_wait: goto discard_it; } - if (skb->len < (th->doff<<2) || tcp_checksum_complete(skb)) { - TCP_INC_STATS_BH(net, TCP_MIB_INERRS); + if (skb->len < (th->doff<<2)) { inet_twsk_put(inet_twsk(sk)); - goto discard_it; + goto bad_packet; + } + if (tcp_checksum_complete(skb)) { + inet_twsk_put(inet_twsk(sk)); + goto csum_error; } switch (tcp_timewait_state_process(inet_twsk(sk), skb, th)) { |
