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Message-ID: <20150128121150.GN13046@secunet.com> Date: Wed, 28 Jan 2015 13:11:51 +0100 From: Steffen Klassert <steffen.klassert@...unet.com> To: Yang Yingliang <yangyingliang@...wei.com> CC: netdev <netdev@...r.kernel.org>, "David S. Miller" <davem@...emloft.net> Subject: [PATCH RFC 1/2] ipv6: Fix after pmtu events dissapearing host routes 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@...unet.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 -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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