From 6a5dc9e598fe90160fee7de098fa319665f5253e Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Mon, 29 Apr 2013 08:39:56 +0000 Subject: 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 Signed-off-by: David S. Miller --- net/ipv4/udp.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) (limited to 'net/ipv4/udp.c') diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c index 2722db024a0b..3159d16441d0 100644 --- a/net/ipv4/udp.c +++ b/net/ipv4/udp.c @@ -1131,6 +1131,8 @@ static unsigned int first_packet_length(struct sock *sk) spin_lock_bh(&rcvq->lock); while ((skb = skb_peek(rcvq)) != NULL && udp_lib_checksum_complete(skb)) { + UDP_INC_STATS_BH(sock_net(sk), UDP_MIB_CSUMERRORS, + IS_UDPLITE(sk)); UDP_INC_STATS_BH(sock_net(sk), UDP_MIB_INERRORS, IS_UDPLITE(sk)); atomic_inc(&sk->sk_drops); @@ -1286,8 +1288,10 @@ out: csum_copy_err: slow = lock_sock_fast(sk); - if (!skb_kill_datagram(sk, skb, flags)) + if (!skb_kill_datagram(sk, skb, flags)) { + UDP_INC_STATS_USER(sock_net(sk), UDP_MIB_CSUMERRORS, is_udplite); UDP_INC_STATS_USER(sock_net(sk), UDP_MIB_INERRORS, is_udplite); + } unlock_sock_fast(sk, slow); if (noblock) @@ -1513,7 +1517,7 @@ int udp_queue_rcv_skb(struct sock *sk, struct sk_buff *skb) if (rcu_access_pointer(sk->sk_filter) && udp_lib_checksum_complete(skb)) - goto drop; + goto csum_error; if (sk_rcvqueues_full(sk, skb, sk->sk_rcvbuf)) @@ -1533,6 +1537,8 @@ int udp_queue_rcv_skb(struct sock *sk, struct sk_buff *skb) return rc; +csum_error: + UDP_INC_STATS_BH(sock_net(sk), UDP_MIB_CSUMERRORS, is_udplite); drop: UDP_INC_STATS_BH(sock_net(sk), UDP_MIB_INERRORS, is_udplite); atomic_inc(&sk->sk_drops); @@ -1749,6 +1755,7 @@ csum_error: proto == IPPROTO_UDPLITE ? "Lite" : "", &saddr, ntohs(uh->source), &daddr, ntohs(uh->dest), ulen); + UDP_INC_STATS_BH(net, UDP_MIB_CSUMERRORS, proto == IPPROTO_UDPLITE); drop: UDP_INC_STATS_BH(net, UDP_MIB_INERRORS, proto == IPPROTO_UDPLITE); kfree_skb(skb); -- cgit v1.2.3