[linux-2.6-block.git] / net / 8021q / vlan_core.c

#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;

	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);
Commit	Line	Data
7750f403 PM	1	#include <linux/skbuff.h>
	2	#include <linux/netdevice.h>
	3	#include <linux/if_vlan.h>
	4	#include "vlan.h"
	5
9b22ea56 PM	6	struct vlan_hwaccel_cb {
	7	struct net_device *dev;
	8	};
	9
	10	static inline struct vlan_hwaccel_cb vlan_hwaccel_cb(struct sk_buff skb)
	11	{
	12	return (struct vlan_hwaccel_cb *)skb->cb;
	13	}
	14
7750f403 PM	15	/* VLAN rx hw acceleration helper. This acts like netif_{rx,receive_skb}(). */
7750f403 PM	16	int __vlan_hwaccel_rx(struct sk_buff skb, struct vlan_group grp,
9bb8582e	17	u16 vlan_tci, int polling)
7750f403	18	{
9b22ea56	19	struct vlan_hwaccel_cb *cb = vlan_hwaccel_cb(skb);
7750f403 PM	20
	21	if (skb_bond_should_drop(skb)) {
	22	dev_kfree_skb_any(skb);
	23	return NET_RX_DROP;
	24	}
	25
bc1d0411	26	skb->vlan_tci = vlan_tci;
9b22ea56 PM	27	cb->dev = vlan_group_get_device(grp, vlan_tci & VLAN_VID_MASK);
	28
	29	return (polling ? netif_receive_skb(skb) : netif_rx(skb));
	30	}
	31	EXPORT_SYMBOL(__vlan_hwaccel_rx);
	32
	33	int vlan_hwaccel_do_receive(struct sk_buff *skb)
	34	{
	35	struct vlan_hwaccel_cb *cb = vlan_hwaccel_cb(skb);
	36	struct net_device *dev = cb->dev;
	37	struct net_device_stats *stats;
	38
bc1d0411 PM	39	netif_nit_deliver(skb);
bc1d0411 PM	40
9b22ea56 PM	41	if (dev == NULL) {
	42	kfree_skb(skb);
	43	return -1;
7750f403	44	}
9b22ea56 PM	45
	46	skb->dev = dev;
	47	skb->priority = vlan_get_ingress_priority(dev, skb->vlan_tci);
bc1d0411	48	skb->vlan_tci = 0;
7750f403	49
9b22ea56	50	stats = &dev->stats;
7750f403 PM	51	stats->rx_packets++;
	52	stats->rx_bytes += skb->len;
	53
7750f403 PM	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,
9b22ea56	65	dev->dev_addr))
7750f403 PM	66	skb->pkt_type = PACKET_HOST;
	67	break;
	68	};
9b22ea56	69	return 0;
7750f403	70	}
22d1ba74 PM	71
	72	struct net_device vlan_dev_real_dev(const struct net_device dev)
	73	{
	74	return vlan_dev_info(dev)->real_dev;
	75	}
	76	EXPORT_SYMBOL_GPL(vlan_dev_real_dev);
	77
	78	u16 vlan_dev_vlan_id(const struct net_device *dev)
	79	{
	80	return vlan_dev_info(dev)->vlan_id;
	81	}
	82	EXPORT_SYMBOL_GPL(vlan_dev_vlan_id);