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#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include <linux/if_vlan.h>
#include "vlan.h"
struct vlan_hwaccel_cb {
struct net_device *dev;
};
static inline struct vlan_hwaccel_cb *vlan_hwaccel_cb(struct sk_buff *skb)
{
return (struct vlan_hwaccel_cb *)skb->cb;
}
/* VLAN rx hw acceleration helper. This acts like netif_{rx,receive_skb}(). */
int __vlan_hwaccel_rx(struct sk_buff *skb, struct vlan_group *grp,
u16 vlan_tci, int polling)
{
struct vlan_hwaccel_cb *cb = vlan_hwaccel_cb(skb);
if (skb_bond_should_drop(skb)) {
dev_kfree_skb_any(skb);
return NET_RX_DROP;
}
skb->vlan_tci = vlan_tci;
cb->dev = vlan_group_get_device(grp, vlan_tci & VLAN_VID_MASK);
return (polling ? netif_receive_skb(skb) : netif_rx(skb));
}
EXPORT_SYMBOL(__vlan_hwaccel_rx);
int vlan_hwaccel_do_receive(struct sk_buff *skb)
{
struct vlan_hwaccel_cb *cb = vlan_hwaccel_cb(skb);
struct net_device *dev = cb->dev;
struct net_device_stats *stats;
netif_nit_deliver(skb);
if (dev == NULL) {
kfree_skb(skb);
return -1;
}
skb->dev = dev;
skb->priority = vlan_get_ingress_priority(dev, skb->vlan_tci);
skb->vlan_tci = 0;
dev->last_rx = jiffies;
stats = &dev->stats;
stats->rx_packets++;
stats->rx_bytes += skb->len;
switch (skb->pkt_type) {
case PACKET_BROADCAST:
break;
case PACKET_MULTICAST:
stats->multicast++;
break;
case PACKET_OTHERHOST:
/* Our lower layer thinks this is not local, let's make sure.
* This allows the VLAN to have a different MAC than the
* underlying device, and still route correctly. */
if (!compare_ether_addr(eth_hdr(skb)->h_dest,
dev->dev_addr))
skb->pkt_type = PACKET_HOST;
break;
};
return 0;
}
struct net_device *vlan_dev_real_dev(const struct net_device *dev)
{
return vlan_dev_info(dev)->real_dev;
}
EXPORT_SYMBOL_GPL(vlan_dev_real_dev);
u16 vlan_dev_vlan_id(const struct net_device *dev)
{
return vlan_dev_info(dev)->vlan_id;
}
EXPORT_SYMBOL_GPL(vlan_dev_vlan_id);
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