Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec...

[cascardo/linux.git] / net / core / lwtunnel.c

diff --git a/net/core/lwtunnel.c b/net/core/lwtunnel.c
index 669ecc9..e5f84c2 100644 (file)
--- a/net/core/lwtunnel.c
+++ b/net/core/lwtunnel.c
@@ -251,6 +251,41 @@ drop:
 }
 EXPORT_SYMBOL(lwtunnel_output);
 
+int lwtunnel_xmit(struct sk_buff *skb)
+{
+       struct dst_entry *dst = skb_dst(skb);
+       const struct lwtunnel_encap_ops *ops;
+       struct lwtunnel_state *lwtstate;
+       int ret = -EINVAL;
+
+       if (!dst)
+               goto drop;
+
+       lwtstate = dst->lwtstate;
+
+       if (lwtstate->type == LWTUNNEL_ENCAP_NONE ||
+           lwtstate->type > LWTUNNEL_ENCAP_MAX)
+               return 0;
+
+       ret = -EOPNOTSUPP;
+       rcu_read_lock();
+       ops = rcu_dereference(lwtun_encaps[lwtstate->type]);
+       if (likely(ops && ops->xmit))
+               ret = ops->xmit(skb);
+       rcu_read_unlock();
+
+       if (ret == -EOPNOTSUPP)
+               goto drop;
+
+       return ret;
+
+drop:
+       kfree_skb(skb);
+
+       return ret;
+}
+EXPORT_SYMBOL(lwtunnel_xmit);
+
 int lwtunnel_input(struct sk_buff *skb)
 {
        struct dst_entry *dst = skb_dst(skb);