diff options
| author | Wei Wang <weiwan@google.com> | 2017-04-20 14:45:47 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-04-24 14:27:17 -0400 |
| commit | 46c2fa39877ed70415ee2b1acfb9129e956f6de4 (patch) | |
| tree | a10691f0b2436b49fb8c172ea4be7b16693aa934 /net/ipv4/tcp_fastopen.c | |
| parent | cf1ef3f0719b4dcb74810ed507e2a2540f9811b4 (diff) | |
| download | linux-46c2fa39877ed70415ee2b1acfb9129e956f6de4.tar.gz linux-46c2fa39877ed70415ee2b1acfb9129e956f6de4.tar.bz2 linux-46c2fa39877ed70415ee2b1acfb9129e956f6de4.zip | |
net/tcp_fastopen: Add snmp counter for blackhole detection
This counter records the number of times the firewall blackhole issue is
detected and active TFO is disabled.
Signed-off-by: Wei Wang <weiwan@google.com>
Acked-by: Yuchung Cheng <ycheng@google.com>
Acked-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/tcp_fastopen.c')
| -rw-r--r-- | net/ipv4/tcp_fastopen.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/net/ipv4/tcp_fastopen.c b/net/ipv4/tcp_fastopen.c index ff2d30ffc6f3..4af82b914dd4 100644 --- a/net/ipv4/tcp_fastopen.c +++ b/net/ipv4/tcp_fastopen.c @@ -410,10 +410,11 @@ static unsigned long tfo_active_disable_stamp __read_mostly; /* Disable active TFO and record current jiffies and * tfo_active_disable_times */ -void tcp_fastopen_active_disable(void) +void tcp_fastopen_active_disable(struct sock *sk) { atomic_inc(&tfo_active_disable_times); tfo_active_disable_stamp = jiffies; + NET_INC_STATS(sock_net(sk), LINUX_MIB_TCPFASTOPENBLACKHOLE); } /* Reset tfo_active_disable_times to 0 */ @@ -469,7 +470,7 @@ void tcp_fastopen_active_disable_ofo_check(struct sock *sk) if (p && !rb_next(p)) { skb = rb_entry(p, struct sk_buff, rbnode); if (TCP_SKB_CB(skb)->tcp_flags & TCPHDR_FIN) { - tcp_fastopen_active_disable(); + tcp_fastopen_active_disable(sk); return; } } |