usb-storage: clean up unusual_devs.h
[linux-2.6/mini2440.git] / net / 8021q / vlan_core.c
blobdd86a1dc4cd00f597ceb58cccefe2625bb1541fa
1 #include <linux/skbuff.h>
2 #include <linux/netdevice.h>
3 #include <linux/if_vlan.h>
4 #include "vlan.h"
6 struct vlan_hwaccel_cb {
7 struct net_device *dev;
8 };
10 static inline struct vlan_hwaccel_cb *vlan_hwaccel_cb(struct sk_buff *skb)
12 return (struct vlan_hwaccel_cb *)skb->cb;
15 /* VLAN rx hw acceleration helper. This acts like netif_{rx,receive_skb}(). */
16 int __vlan_hwaccel_rx(struct sk_buff *skb, struct vlan_group *grp,
17 u16 vlan_tci, int polling)
19 struct vlan_hwaccel_cb *cb = vlan_hwaccel_cb(skb);
21 if (skb_bond_should_drop(skb)) {
22 dev_kfree_skb_any(skb);
23 return NET_RX_DROP;
26 skb->vlan_tci = vlan_tci;
27 cb->dev = vlan_group_get_device(grp, vlan_tci & VLAN_VID_MASK);
29 return (polling ? netif_receive_skb(skb) : netif_rx(skb));
31 EXPORT_SYMBOL(__vlan_hwaccel_rx);
33 int vlan_hwaccel_do_receive(struct sk_buff *skb)
35 struct vlan_hwaccel_cb *cb = vlan_hwaccel_cb(skb);
36 struct net_device *dev = cb->dev;
37 struct net_device_stats *stats;
39 netif_nit_deliver(skb);
41 if (dev == NULL) {
42 kfree_skb(skb);
43 return -1;
46 skb->dev = dev;
47 skb->priority = vlan_get_ingress_priority(dev, skb->vlan_tci);
48 skb->vlan_tci = 0;
50 stats = &dev->stats;
51 stats->rx_packets++;
52 stats->rx_bytes += skb->len;
54 switch (skb->pkt_type) {
55 case PACKET_BROADCAST:
56 break;
57 case PACKET_MULTICAST:
58 stats->multicast++;
59 break;
60 case PACKET_OTHERHOST:
61 /* Our lower layer thinks this is not local, let's make sure.
62 * This allows the VLAN to have a different MAC than the
63 * underlying device, and still route correctly. */
64 if (!compare_ether_addr(eth_hdr(skb)->h_dest,
65 dev->dev_addr))
66 skb->pkt_type = PACKET_HOST;
67 break;
69 return 0;
72 struct net_device *vlan_dev_real_dev(const struct net_device *dev)
74 return vlan_dev_info(dev)->real_dev;
76 EXPORT_SYMBOL_GPL(vlan_dev_real_dev);
78 u16 vlan_dev_vlan_id(const struct net_device *dev)
80 return vlan_dev_info(dev)->vlan_id;
82 EXPORT_SYMBOL_GPL(vlan_dev_vlan_id);