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authorJulian Anastasov <ja@ssi.bg>2017-02-06 23:14:15 +0200
committerDavid S. Miller <davem@davemloft.net>2017-02-07 13:07:46 -0500
commit63fca65d08632fbec9d9b655f671cf08aa1aeeb8 (patch)
tree103ac18cddcdf911a8589f52fbcefb7140411a51 /net/ipv6
parentc3a2e8370534f810cac6050169db0ed3e0f94f0b (diff)
downloadlinux-63fca65d08632fbec9d9b655f671cf08aa1aeeb8.tar.bz2
net: add confirm_neigh method to dst_ops
Add confirm_neigh method to dst_ops and use it from IPv4 and IPv6 to lookup and confirm the neighbour. Its usage via the new helper dst_confirm_neigh() should be restricted to MSG_PROBE users for performance reasons. For XFRM prefer the last tunnel address, if present. With help from Steffen Klassert. Signed-off-by: Julian Anastasov <ja@ssi.bg> Acked-by: Steffen Klassert <steffen.klassert@secunet.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6')
-rw-r--r--net/ipv6/route.c16
1 files changed, 16 insertions, 0 deletions
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index 8ffa24cc8899..98b183f1bc8b 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -223,6 +223,21 @@ static struct neighbour *ip6_neigh_lookup(const struct dst_entry *dst,
return neigh_create(&nd_tbl, daddr, dst->dev);
}
+static void ip6_confirm_neigh(const struct dst_entry *dst, const void *daddr)
+{
+ struct net_device *dev = dst->dev;
+ struct rt6_info *rt = (struct rt6_info *)dst;
+
+ daddr = choose_neigh_daddr(rt, NULL, daddr);
+ if (!daddr)
+ return;
+ if (dev->flags & (IFF_NOARP | IFF_LOOPBACK))
+ return;
+ if (ipv6_addr_is_multicast((const struct in6_addr *)daddr))
+ return;
+ __ipv6_confirm_neigh(dev, daddr);
+}
+
static struct dst_ops ip6_dst_ops_template = {
.family = AF_INET6,
.gc = ip6_dst_gc,
@@ -239,6 +254,7 @@ static struct dst_ops ip6_dst_ops_template = {
.redirect = rt6_do_redirect,
.local_out = __ip6_local_out,
.neigh_lookup = ip6_neigh_lookup,
+ .confirm_neigh = ip6_confirm_neigh,
};
static unsigned int ip6_blackhole_mtu(const struct dst_entry *dst)