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authorSteffen Klassert2013-01-16 20:58:10 +0000
committerDavid S. Miller2013-01-17 03:39:36 -0500
commitfa1e492aa3cbafba9f8fc6d05e5b08a3091daf4a (patch)
tree74f0153ddfa82c4503be46bf03b80641c10a6c78 /net
parent38d523e2948162776903349c89d65f7b9370dadb (diff)
ipv4: Don't update the pmtu on mtu locked routes
Routes with locked mtu should not use learned pmtu informations, so do not update the pmtu on these routes. Reported-by: Julian Anastasov <ja@ssi.bg> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/ipv4/route.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index 6e4a89c5e27e..259cbeee9a8b 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -912,6 +912,9 @@ static void __ip_rt_update_pmtu(struct rtable *rt, struct flowi4 *fl4, u32 mtu)
struct dst_entry *dst = &rt->dst;
struct fib_result res;
+ if (dst_metric_locked(dst, RTAX_MTU))
+ return;
+
if (dst->dev->mtu < mtu)
return;