From: Steffen Klassert <steffen.klassert@secunet•com>
To: Yang Yingliang <yangyingliang@huawei•com>
Cc: netdev <netdev@vger•kernel.org>, "David S. Miller" <davem@davemloft•net>
Subject: [PATCH RFC 1/2] ipv6: Fix after pmtu events dissapearing host routes
Date: Wed, 28 Jan 2015 13:11:51 +0100 [thread overview]
Message-ID: <20150128121150.GN13046@secunet.com> (raw)
In-Reply-To: <20150128121026.GM13046@secunet.com>
We currently don't clone host routes before we use them.
If a pmtu event is received on such a route, it gets
an expires value. As soon as the expiration time is
elapsed, the route is deleted. As a result, the host
is not reachable any more.
We fix this by cloning host routes if they are gatewayed,
i.e. if pmtu events can happen.
Signed-off-by: Steffen Klassert <steffen.klassert@secunet•com>
---
net/ipv6/route.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index c910831..3e864e7 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -961,7 +961,7 @@ redo_rt6_select:
if (!(rt->rt6i_flags & (RTF_NONEXTHOP | RTF_GATEWAY)))
nrt = rt6_alloc_cow(rt, &fl6->daddr, &fl6->saddr);
- else if (!(rt->dst.flags & DST_HOST))
+ else if (!(rt->dst.flags & DST_HOST) || (rt->rt6i_flags & RTF_GATEWAY))
nrt = rt6_alloc_clone(rt, &fl6->daddr);
else
goto out2;
--
1.9.1
next prev parent reply other threads:[~2015-01-28 20:41 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-01-27 12:58 A problem about ICMP packet-too-big message handler Yang Yingliang
2015-01-28 5:19 ` Martin Lau
2015-01-28 6:46 ` Yang Yingliang
2015-01-28 12:45 ` Eric Dumazet
2015-01-29 1:04 ` Yang Yingliang
2015-01-28 8:42 ` Hannes Frederic Sowa
2015-01-28 10:07 ` Yang Yingliang
2015-01-28 12:10 ` Steffen Klassert
2015-01-28 12:11 ` Steffen Klassert [this message]
2015-01-29 10:26 ` [PATCH RFC 1/2] ipv6: Fix after pmtu events dissapearing host routes Hannes Frederic Sowa
2015-01-29 10:44 ` Steffen Klassert
2015-02-05 23:56 ` Martin Lau
2015-02-09 10:26 ` Steffen Klassert
2015-03-09 9:00 ` Steffen Klassert
2015-01-28 12:12 ` [PATCH RFC 2/2] ipv6: Extend the route lookups to low priority metrics Steffen Klassert
2015-01-29 3:16 ` A problem about ICMP packet-too-big message handler Yang Yingliang
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