Commit 2bc8ca40 authored Oct 11, 2011 by Steffen Klassert Committed by David S. Miller Nov 08, 2011

ipv4: Fix inetpeer expire time information



As we update the learned pmtu informations on demand, we might
report a nagative expiration time value to userspace if the
pmtu informations are already expired and we have not send a
packet to that inetpeer after expiration. With this patch we
send a expire time of null to userspace after expiration
until the next packet is send to that inetpeer.

Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent 20db93c3

net/ipv4/route.c

+7 −3

Original line number	Diff line number	Diff line
		@@ -2845,7 +2845,7 @@ static int rt_fill_info(struct net *net,
		struct rtable *rt = skb_rtable(skb);
		struct rtmsg *r;
		struct nlmsghdr *nlh;
		long expires = 0;
		unsigned long expires = 0;
		const struct inet_peer *peer = rt->peer;
		u32 id = 0, ts = 0, tsage = 0, error;

		@@ -2902,8 +2902,12 @@ static int rt_fill_info(struct net *net,
		tsage = get_seconds() - peer->tcp_ts_stamp;
		}
		expires = ACCESS_ONCE(peer->pmtu_expires);
		if (expires)
		if (expires) {
		if (time_before(jiffies, expires))
		expires -= jiffies;
		else
		expires = 0;
		}
		}

		if (rt_is_input_route(rt)) {