Commit fa1e492a authored by Steffen Klassert's avatar Steffen Klassert Committed by David S. Miller

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: default avatarJulian Anastasov <ja@ssi.bg>
Signed-off-by: default avatarSteffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 38d523e2
...@@ -912,6 +912,9 @@ static void __ip_rt_update_pmtu(struct rtable *rt, struct flowi4 *fl4, u32 mtu) ...@@ -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 dst_entry *dst = &rt->dst;
struct fib_result res; struct fib_result res;
if (dst_metric_locked(dst, RTAX_MTU))
return;
if (dst->dev->mtu < mtu) if (dst->dev->mtu < mtu)
return; return;
......
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