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/ipv4/ipmr.c b/net/ipv4/ipmr.c
index 7a7ee1cc3b5a..217ebe035b34 100644
--- a/net/ipv4/ipmr.c
+++ b/net/ipv4/ipmr.c
@@ -1831,14 +1831,12 @@ static int __pim_rcv(struct mr_table *mrt, struct sk_buff *skb,
         skb->mac_header = skb->network_header;
         skb_pull(skb, (u8*)encap - skb->data);
         skb_reset_network_header(skb);
-        skb->dev = reg_dev;
         skb->protocol = htons(ETH_P_IP);
         skb->ip_summed = 0;
         skb->pkt_type = PACKET_HOST;
-        skb_dst_drop(skb);
-        reg_dev->stats.rx_bytes += skb->len;
-        reg_dev->stats.rx_packets++;
-        nf_reset(skb);
+
+        skb_tunnel_rx(skb, reg_dev);
+
         netif_rx(skb);
         dev_put(reg_dev);