net/tcp_fastopen: Add snmp counter for blackhole detection
authorWei Wang <weiwan@google.com>
Thu, 20 Apr 2017 21:45:47 +0000 (14:45 -0700)
committerDavid S. Miller <davem@davemloft.net>
Mon, 24 Apr 2017 18:27:17 +0000 (14:27 -0400)
commit46c2fa39877ed70415ee2b1acfb9129e956f6de4
treea10691f0b2436b49fb8c172ea4be7b16693aa934
parentcf1ef3f0719b4dcb74810ed507e2a2540f9811b4
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>
include/net/tcp.h
include/uapi/linux/snmp.h
net/ipv4/proc.c
net/ipv4/tcp_fastopen.c
net/ipv4/tcp_input.c