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authorYafang Shao <laoar.shao@gmail.com>2018-06-24 17:02:54 +0300
committerDavid S. Miller <davem@davemloft.net>2018-06-26 05:49:08 +0300
commitfb223502ec0889444965f602f57b1f45f9e9845e (patch)
tree08a4895a31a307722691a1f6abdb1e44c658dece /net/ipv4/proc.c
parent7e55052783fd3a9202e9f7c4c480629a7270645f (diff)
downloadlinux-fb223502ec0889444965f602f57b1f45f9e9845e.tar.xz
tcp: add SNMP counter for zero-window drops
It will be helpful if we could display the drops due to zero window or no enough window space. So a new SNMP MIB entry is added to track this behavior. This entry is named LINUX_MIB_TCPZEROWINDOWDROP and published in /proc/net/netstat in TcpExt line as TCPZeroWindowDrop. Signed-off-by: Yafang Shao <laoar.shao@gmail.com> Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/proc.c')
-rw-r--r--net/ipv4/proc.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/net/ipv4/proc.c b/net/ipv4/proc.c
index 77350c1256ce..225ef3433fe5 100644
--- a/net/ipv4/proc.c
+++ b/net/ipv4/proc.c
@@ -287,6 +287,7 @@ static const struct snmp_mib snmp4_net_list[] = {
SNMP_MIB_ITEM("TCPDelivered", LINUX_MIB_TCPDELIVERED),
SNMP_MIB_ITEM("TCPDeliveredCE", LINUX_MIB_TCPDELIVEREDCE),
SNMP_MIB_ITEM("TCPAckCompressed", LINUX_MIB_TCPACKCOMPRESSED),
+ SNMP_MIB_ITEM("TCPZeroWindowDrop", LINUX_MIB_TCPZEROWINDOWDROP),
SNMP_MIB_SENTINEL
};