net: Introduce skb_tunnel_rx() helper

skb rxhash should be cleared when a skb is handled by a tunnel before
being delivered again, so that correct packet steering can take place.

There are other cleanups and accounting that we can factorize in a new
helper, skb_tunnel_rx()

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 5 deletions

diff --git a/net/ipv6/sit.c b/net/ipv6/sit.c
index 5abae10cd884..e51e650ea80b 100644
--- a/net/ipv6/sit.c
+++ b/net/ipv6/sit.c
@@ -566,11 +566,9 @@ static int ipip6_rcv(struct sk_buff *skb)
                         kfree_skb(skb);
                         return 0;
                 }
-                tunnel->dev->stats.rx_packets++;
-                tunnel->dev->stats.rx_bytes += skb->len;
-                skb->dev = tunnel->dev;
-                skb_dst_drop(skb);
-                nf_reset(skb);
+
+                skb_tunnel_rx(skb, tunnel->dev);
+
                 ipip6_ecn_decapsulate(iph, skb);
                 netif_rx(skb);
                 rcu_read_unlock();