diff options
Diffstat (limited to 'net/8021q/vlan_core.c')
| -rw-r--r-- | net/8021q/vlan_core.c | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/net/8021q/vlan_core.c b/net/8021q/vlan_core.c new file mode 100644 index 00000000000..916061f681b --- /dev/null +++ b/net/8021q/vlan_core.c @@ -0,0 +1,64 @@ +#include <linux/skbuff.h> +#include <linux/netdevice.h> +#include <linux/if_vlan.h> +#include "vlan.h" + +/* 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 net_device_stats *stats; + + if (skb_bond_should_drop(skb)) { + dev_kfree_skb_any(skb); + return NET_RX_DROP; + } + + skb->vlan_tci = vlan_tci; + netif_nit_deliver(skb); + + skb->dev = vlan_group_get_device(grp, vlan_tci & VLAN_VID_MASK); + if (skb->dev == NULL) { + dev_kfree_skb_any(skb); + /* Not NET_RX_DROP, this is not being dropped + * due to congestion. */ + return NET_RX_SUCCESS; + } + skb->dev->last_rx = jiffies; + skb->vlan_tci = 0; + + stats = &skb->dev->stats; + stats->rx_packets++; + stats->rx_bytes += skb->len; + + skb->priority = vlan_get_ingress_priority(skb->dev, vlan_tci); + 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, + skb->dev->dev_addr)) + skb->pkt_type = PACKET_HOST; + break; + }; + return (polling ? netif_receive_skb(skb) : netif_rx(skb)); +} +EXPORT_SYMBOL(__vlan_hwaccel_rx); + +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); |