diff options
Diffstat (limited to 'include/net/ip6_route.h')
| -rw-r--r-- | include/net/ip6_route.h | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/include/net/ip6_route.h b/include/net/ip6_route.h index 8df4ff798b04..4cf1ef935ed9 100644 --- a/include/net/ip6_route.h +++ b/include/net/ip6_route.h @@ -279,6 +279,27 @@ static inline bool rt6_duplicate_nexthop(struct fib6_info *a, struct fib6_info * !lwtunnel_cmp_encap(a->fib6_nh.nh_lwtstate, b->fib6_nh.nh_lwtstate); } +static inline unsigned int ip6_dst_mtu_forward(const struct dst_entry *dst) +{ + struct inet6_dev *idev; + unsigned int mtu; + + if (dst_metric_locked(dst, RTAX_MTU)) { + mtu = dst_metric_raw(dst, RTAX_MTU); + if (mtu) + return mtu; + } + + mtu = IPV6_MIN_MTU; + rcu_read_lock(); + idev = __in6_dev_get(dst->dev); + if (idev) + mtu = idev->cnf.mtu6; + rcu_read_unlock(); + + return mtu; +} + struct neighbour *ip6_neigh_lookup(const struct in6_addr *gw, struct net_device *dev, struct sk_buff *skb, const void *daddr); |