new file mode 100644
index 000000000000..28ac810da6e9
--- /dev/null
+++ b/net/mpls/vpls.c
@@ -0,0 +1,469 @@
+/*
+ * net/mpls/vpls.c
+ *
+ * Copyright (C) 2016 David Lamparter
+ *
+ */
+
+#include <linux/netdevice.h>
+#include <linux/slab.h>
+#include <linux/ethtool.h>
+#include <linux/etherdevice.h>
+#include <linux/u64_stats_sync.h>
+#include <linux/mpls.h>
+
+#include <net/rtnetlink.h>
+#include <net/dst.h>
+#include <net/xfrm.h>
+#include <net/mpls.h>
+#include <linux/module.h>
+#include <net/dst_metadata.h>
+#include <net/ip_tunnels.h>
some headers are not needed.
+
+static netdev_tx_t vpls_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+ int err = -EINVAL, ok_count = 0;
+ struct vpls_priv *priv = netdev_priv(dev);
+ struct vpls_info *vi;
+ struct pcpu_sw_netstats *stats;
+ size_t len = skb->len;
+
+ rcu_read_lock();
+ vi = skb_vpls_info(skb);
+
+ skb_orphan(skb);
+ skb_forward_csum(skb);
+
+ if (vi) {
+ err = vpls_xmit_wire(skb, dev, priv, vi->pw_label);
+ if (err)
+ goto out_err;
+ } else {
the rcu_read_lock() is just needed for the else statement right ?
+ struct sk_buff *cloned;
+ struct vpls_wirelist *wl;
+ size_t i;
+
+ wl = rcu_dereference(priv->wires);
+ if (wl->count == 0) {
+ dev->stats.tx_carrier_errors++;
+ goto out_err;
+ }
+
+ for (i = 0; i < wl->count; i++) {
+ cloned = skb_clone(skb, GFP_KERNEL);
+ if (vpls_xmit_wire(cloned, dev, priv, wl->wires[i]))
+ consume_skb(cloned);
+ else
+ ok_count++;
+ }
+ if (!ok_count)
+ goto out_err;
+
+ consume_skb(skb);
+ }
+
+ stats = this_cpu_ptr(dev->tstats);
+ u64_stats_update_begin(&stats->syncp);
+ stats->tx_packets++;
+ stats->tx_bytes += len;
+ u64_stats_update_end(&stats->syncp);
+
+ rcu_read_unlock();
+ return 0;
+}
+int vpls_rcv(struct sk_buff *skb, struct net_device *in_dev,
+ struct packet_type *pt, struct mpls_route *rt,
+ struct mpls_shim_hdr *hdr, struct net_device *orig_dev)
+{
+ struct net_device *dev = rt->rt_vpls_dev;
+ struct mpls_entry_decoded dec;
+ struct metadata_dst *md_dst;
+ struct pcpu_sw_netstats *stats;
+
+ if (!dev)
+ goto drop_nodev;
+
we can get dec.bos from mpls stack as a function param, no need to
decode the mpls header again.
+ dec = mpls_entry_decode(hdr);
+ if (!dec.bos) {
+ dev->stats.rx_frame_errors++;
+ goto drop;
+ }
+
+ skb_pull(skb, sizeof(*hdr));
+
+ if (unlikely(!pskb_may_pull(skb, ETH_HLEN))) {
+ dev->stats.rx_length_errors++;
+ goto drop;
+ }
+static const struct net_device_ops vpls_netdev_ops = {
+ .ndo_init = vpls_dev_init,
+ .ndo_open = vpls_open,
+ .ndo_stop = vpls_close,
+ .ndo_start_xmit = vpls_xmit,
+ .ndo_change_mtu = vpls_change_mtu,
+ .ndo_get_stats64 = ip_tunnel_get_stats64,
+ .ndo_set_rx_mode = vpls_set_multicast_list,
+ .ndo_set_mac_address = eth_mac_addr,
+ .ndo_features_check = passthru_features_check,
+};
can you add .ndo_get_stats64 function ?
