From: Steffen Klassert Date: Wed, 23 Nov 2011 02:12:13 +0000 (+0000) Subject: route: Use the device mtu as the default for blackhole routes X-Git-Tag: upstream/snapshot3+hdmi~8634^2~32 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=6b600b26c0215bf9ed04062ecfacf0bc20e2588c;p=platform%2Fadaptation%2Frenesas_rcar%2Frenesas_kernel.git route: Use the device mtu as the default for blackhole routes As it is, we return null as the default mtu of blackhole routes. This may lead to a propagation of a bogus pmtu if the default_mtu method of a blackhole route is invoked. So return dst->dev->mtu as the default mtu instead. Signed-off-by: Steffen Klassert Signed-off-by: David S. Miller --- diff --git a/net/ipv4/route.c b/net/ipv4/route.c index 0c74da8..5b17bf1 100644 --- a/net/ipv4/route.c +++ b/net/ipv4/route.c @@ -2757,7 +2757,7 @@ static struct dst_entry *ipv4_blackhole_dst_check(struct dst_entry *dst, u32 coo static unsigned int ipv4_blackhole_default_mtu(const struct dst_entry *dst) { - return 0; + return dst->dev->mtu; } static void ipv4_rt_blackhole_update_pmtu(struct dst_entry *dst, u32 mtu) diff --git a/net/ipv6/route.c b/net/ipv6/route.c index 8473016..d8fbd18 100644 --- a/net/ipv6/route.c +++ b/net/ipv6/route.c @@ -157,7 +157,7 @@ static struct dst_ops ip6_dst_ops_template = { static unsigned int ip6_blackhole_default_mtu(const struct dst_entry *dst) { - return 0; + return dst->dev->mtu; } static void ip6_rt_blackhole_update_pmtu(struct dst_entry *dst, u32 mtu)