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authorDavid S. Miller <davem@sunset.davemloft.net>2006-08-01 07:32:09 +0200
committerDavid S. Miller <davem@sunset.davemloft.net>2006-08-02 22:38:24 +0200
commit52499afe40387524e9f46ef9ce4695efccdd2ed9 (patch)
treeeb097a1c4150ff00a66a692f378ea4fb6f1035f0 /net/ipv4/tcp.c
parent[SECURITY] secmark: nul-terminate secdata (diff)
downloadlinux-52499afe40387524e9f46ef9ce4695efccdd2ed9.tar.xz
linux-52499afe40387524e9f46ef9ce4695efccdd2ed9.zip
[TCP]: Process linger2 timeout consistently.
Based upon guidance from Alexey Kuznetsov. When linger2 is active, we check to see if the fin_wait2 timeout is longer than the timewait. If it is, we schedule the keepalive timer for the difference between the timewait timeout and the fin_wait2 timeout. When this orphan socket is seen by tcp_keepalive_timer() it will try to transform this fin_wait2 socket into a fin_wait2 mini-socket, again if linger2 is active. Not all paths were setting this initial keepalive timer correctly. The tcp input path was doing it correctly, but tcp_close() wasn't, potentially making the socket linger longer than it really needs to. Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/tcp.c')
-rw-r--r--net/ipv4/tcp.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index f6a2d9223d07..7b621e44b124 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -1659,7 +1659,8 @@ adjudge_to_death:
const int tmo = tcp_fin_time(sk);
if (tmo > TCP_TIMEWAIT_LEN) {
- inet_csk_reset_keepalive_timer(sk, tcp_fin_time(sk));
+ inet_csk_reset_keepalive_timer(sk,
+ tmo - TCP_TIMEWAIT_LEN);
} else {
tcp_time_wait(sk, TCP_FIN_WAIT2, tmo);
goto out;