diff options
| author | Xin Long <lucien.xin@gmail.com> | 2016-10-28 18:18:01 +0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-10-31 14:24:24 -0400 |
| commit | 19bda36c4299ce3d7e5bce10bebe01764a655a6d (patch) | |
| tree | 813a1c2297d879c1cefad077e231aa6a380f4ae7 | |
| parent | f89c56ce710afa65e1b2ead555b52c4807f34ff7 (diff) | |
ipv6: add mtu lock check in __ip6_rt_update_pmtu
Prior to this patch, ipv6 didn't do mtu lock check in ip6_update_pmtu.
It leaded to that mtu lock doesn't really work when receiving the pkt
of ICMPV6_PKT_TOOBIG.
This patch is to add mtu lock check in __ip6_rt_update_pmtu just as ipv4
did in __ip_rt_update_pmtu.
Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | net/ipv6/route.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/net/ipv6/route.c b/net/ipv6/route.c index 947ed1ded026..7403d90dcb38 100644 --- a/net/ipv6/route.c +++ b/net/ipv6/route.c @@ -1364,6 +1364,9 @@ static void __ip6_rt_update_pmtu(struct dst_entry *dst, const struct sock *sk, if (rt6->rt6i_flags & RTF_LOCAL) return; + if (dst_metric_locked(dst, RTAX_MTU)) + return; + dst_confirm(dst); mtu = max_t(u32, mtu, IPV6_MIN_MTU); if (mtu >= dst_mtu(dst)) |