xfrm: provide correct dst in xfrm_neigh_lookup
Fix xfrm_neigh_lookup to provide dst->path to the
neigh_lookup dst_ops method.
When skb is provided, the IP address in packet should already
match the dst->path address family. But for the non-skb case,
we should consider the last tunnel address as nexthop address.
Fixes: f894cbf847c9 ("net: Add optional SKB arg to dst_ops->neigh_lookup().")
Signed-off-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c
index 5f3e878..0806dcc 100644
--- a/net/xfrm/xfrm_policy.c
+++ b/net/xfrm/xfrm_policy.c
@@ -2836,14 +2836,8 @@ static unsigned int xfrm_mtu(const struct dst_entry *dst)
return mtu ? : dst_mtu(dst->path);
}
-static struct neighbour *xfrm_neigh_lookup(const struct dst_entry *dst,
- struct sk_buff *skb,
- const void *daddr)
-{
- return dst->path->ops->neigh_lookup(dst, skb, daddr);
-}
-
-static void xfrm_confirm_neigh(const struct dst_entry *dst, const void *daddr)
+static const void *xfrm_get_dst_nexthop(const struct dst_entry *dst,
+ const void *daddr)
{
const struct dst_entry *path = dst->path;
@@ -2857,6 +2851,25 @@ static void xfrm_confirm_neigh(const struct dst_entry *dst, const void *daddr)
else if (!(xfrm->type->flags & XFRM_TYPE_LOCAL_COADDR))
daddr = &xfrm->id.daddr;
}
+ return daddr;
+}
+
+static struct neighbour *xfrm_neigh_lookup(const struct dst_entry *dst,
+ struct sk_buff *skb,
+ const void *daddr)
+{
+ const struct dst_entry *path = dst->path;
+
+ if (!skb)
+ daddr = xfrm_get_dst_nexthop(dst, daddr);
+ return path->ops->neigh_lookup(path, skb, daddr);
+}
+
+static void xfrm_confirm_neigh(const struct dst_entry *dst, const void *daddr)
+{
+ const struct dst_entry *path = dst->path;
+
+ daddr = xfrm_get_dst_nexthop(dst, daddr);
path->ops->confirm_neigh(path, daddr);
}