diff options
| author | Eric Dumazet <edumazet@google.com> | 2015-05-06 23:26:25 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-05-09 22:42:32 +0200 |
| commit | e520af48c7e5acae5f17f82a79ba7ab7cf156f3b (patch) | |
| tree | 45729a77a2017ec24e8185e7279b97a2019f87fe /net/ipv4/tcp_timer.c | |
| parent | tcp: adjust window probe timers to safer values (diff) | |
| download | linux-e520af48c7e5acae5f17f82a79ba7ab7cf156f3b.tar.xz linux-e520af48c7e5acae5f17f82a79ba7ab7cf156f3b.zip | |
tcp: add TCPWinProbe and TCPKeepAlive SNMP counters
Diagnosing problems related to Window Probes has been hard because
we lack a counter.
TCPWinProbe counts the number of ACK packets a sender has to send
at regular intervals to make sure a reverse ACK packet opening back
a window had not been lost.
TCPKeepAlive counts the number of ACK packets sent to keep TCP
flows alive (SO_KEEPALIVE)
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Yuchung Cheng <ycheng@google.com>
Acked-by: Neal Cardwell <ncardwell@google.com>
Acked-by: Nandita Dukkipati <nanditad@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/tcp_timer.c')
| -rw-r--r-- | net/ipv4/tcp_timer.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv4/tcp_timer.c b/net/ipv4/tcp_timer.c index 8c65dc147d8b..65bf670e8714 100644 --- a/net/ipv4/tcp_timer.c +++ b/net/ipv4/tcp_timer.c @@ -616,7 +616,7 @@ static void tcp_keepalive_timer (unsigned long data) tcp_write_err(sk); goto out; } - if (tcp_write_wakeup(sk) <= 0) { + if (tcp_write_wakeup(sk, LINUX_MIB_TCPKEEPALIVE) <= 0) { icsk->icsk_probes_out++; elapsed = keepalive_intvl_when(tp); } else { |