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| author | Eric Dumazet <eric.dumazet@gmail.com> | 2010-03-08 02:21:57 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-03-08 21:45:27 +0300 |
| commit | 6cce09f87a04797fae5b947ef2626c14a78f0b49 (patch) | |
| tree | a1d7638f9571a29db9bc5c5d8e0baee19597d59e /net/ipv6/tcp_ipv6.c | |
| parent | 4045635318538d3ddd2007720412fdc4b08f6a62 (diff) | |
| download | linux-6cce09f87a04797fae5b947ef2626c14a78f0b49.tar.xz | |
tcp: Add SNMP counters for backlog and min_ttl drops
Commit 6b03a53a (tcp: use limited socket backlog) added the possibility
of dropping frames when backlog queue is full.
Commit d218d111 (tcp: Generalized TTL Security Mechanism) added the
possibility of dropping frames when TTL is under a given limit.
This patch adds new SNMP MIB entries, named TCPBacklogDrop and
TCPMinTTLDrop, published in /proc/net/netstat in TcpExt: line
netstat -s | egrep "TCPBacklogDrop|TCPMinTTLDrop"
TCPBacklogDrop: 0
TCPMinTTLDrop: 0
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.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 | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c index 2c378b1bd5cf..9b6dbba80d31 100644 --- a/net/ipv6/tcp_ipv6.c +++ b/net/ipv6/tcp_ipv6.c @@ -1740,8 +1740,9 @@ process: if (!tcp_prequeue(sk, skb)) ret = tcp_v6_do_rcv(sk, skb); } - } else if (sk_add_backlog(sk, skb)) { + } else if (unlikely(sk_add_backlog(sk, skb))) { bh_unlock_sock(sk); + NET_INC_STATS_BH(net, LINUX_MIB_TCPBACKLOGDROP); goto discard_and_relse; } bh_unlock_sock(sk); |