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

#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include <linux/if_vlan.h>
#include <linux/netpoll.h>
#include "vlan.h"

bool vlan_hwaccel_do_receive(struct sk_buff **skbp)
{
	struct sk_buff *skb = *skbp;
	u16 vlan_id = skb->vlan_tci & VLAN_VID_MASK;
	struct net_device *vlan_dev;
	struct vlan_rx_stats *rx_stats;

	vlan_dev = vlan_find_dev(skb->dev, vlan_id);
	if (!vlan_dev) {
		if (vlan_id)
			skb->pkt_type = PACKET_OTHERHOST;
		return false;
	}

	skb = *skbp = skb_share_check(skb, GFP_ATOMIC);
	if (unlikely(!skb))
		return false;

	skb->dev = vlan_dev;
	skb->priority = vlan_get_ingress_priority(vlan_dev, skb->vlan_tci);
	skb->vlan_tci = 0;

	rx_stats = this_cpu_ptr(vlan_dev_info(vlan_dev)->vlan_rx_stats);

	u64_stats_update_begin(&rx_stats->syncp);
	rx_stats->rx_packets++;
	rx_stats->rx_bytes += skb->len;

	switch (skb->pkt_type) {
	case PACKET_BROADCAST:
		break;
	case PACKET_MULTICAST:
		rx_stats->rx_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,
					vlan_dev->dev_addr))
			skb->pkt_type = PACKET_HOST;
		break;
	}
	u64_stats_update_end(&rx_stats->syncp);

	return true;
}

struct net_device *vlan_dev_real_dev(const struct net_device *dev)
{
	return vlan_dev_info(dev)->real_dev;
}
EXPORT_SYMBOL(vlan_dev_real_dev);

u16 vlan_dev_vlan_id(const struct net_device *dev)
{
	return vlan_dev_info(dev)->vlan_id;
}
EXPORT_SYMBOL(vlan_dev_vlan_id);

/* 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)
{
	__vlan_hwaccel_put_tag(skb, vlan_tci);
	return polling ? netif_receive_skb(skb) : netif_rx(skb);
}
EXPORT_SYMBOL(__vlan_hwaccel_rx);

gro_result_t vlan_gro_receive(struct napi_struct *napi, struct vlan_group *grp,
			      unsigned int vlan_tci, struct sk_buff *skb)
{
	__vlan_hwaccel_put_tag(skb, vlan_tci);
	return napi_gro_receive(napi, skb);
}
EXPORT_SYMBOL(vlan_gro_receive);

gro_result_t vlan_gro_frags(struct napi_struct *napi, struct vlan_group *grp,
			    unsigned int vlan_tci)
{
	__vlan_hwaccel_put_tag(napi->skb, vlan_tci);
	return napi_gro_frags(napi);
}
EXPORT_SYMBOL(vlan_gro_frags);
Commit	Line	Data
7750f403 PM	1	#include <linux/skbuff.h>
	2	#include <linux/netdevice.h>
	3	#include <linux/if_vlan.h>
4ead4431	4	#include <linux/netpoll.h>
7750f403 PM	5	#include "vlan.h"
7750f403 PM	6
3701e513	7	bool vlan_hwaccel_do_receive(struct sk_buff **skbp)
7750f403	8	{
3701e513 JG	9	struct sk_buff skb = skbp;
3701e513 JG	10	u16 vlan_id = skb->vlan_tci & VLAN_VID_MASK;
ad1afb00	11	struct net_device *vlan_dev;
3701e513	12	struct vlan_rx_stats *rx_stats;
7750f403	13
3701e513 JG	14	vlan_dev = vlan_find_dev(skb->dev, vlan_id);
	15	if (!vlan_dev) {
	16	if (vlan_id)
	17	skb->pkt_type = PACKET_OTHERHOST;
	18	return false;
173e79fb	19	}
9b22ea56	20
3701e513 JG	21	skb = *skbp = skb_share_check(skb, GFP_ATOMIC);
	22	if (unlikely(!skb))
	23	return false;
e1c096e2	24
3701e513 JG	25	skb->dev = vlan_dev;
3701e513 JG	26	skb->priority = vlan_get_ingress_priority(vlan_dev, skb->vlan_tci);
bc1d0411	27	skb->vlan_tci = 0;
7750f403	28
3701e513	29	rx_stats = this_cpu_ptr(vlan_dev_info(vlan_dev)->vlan_rx_stats);
9793241f	30
9618e2ff	31	u64_stats_update_begin(&rx_stats->syncp);
9793241f ED	32	rx_stats->rx_packets++;
9793241f ED	33	rx_stats->rx_bytes += skb->len;
7750f403	34
7750f403 PM	35	switch (skb->pkt_type) {
	36	case PACKET_BROADCAST:
	37	break;
	38	case PACKET_MULTICAST:
9618e2ff	39	rx_stats->rx_multicast++;
7750f403 PM	40	break;
	41	case PACKET_OTHERHOST:
	42	/* Our lower layer thinks this is not local, let's make sure.
	43	* This allows the VLAN to have a different MAC than the
	44	* underlying device, and still route correctly. */
	45	if (!compare_ether_addr(eth_hdr(skb)->h_dest,
3701e513	46	vlan_dev->dev_addr))
7750f403 PM	47	skb->pkt_type = PACKET_HOST;
7750f403 PM	48	break;
ccbd6a5a	49	}
9618e2ff	50	u64_stats_update_end(&rx_stats->syncp);
3701e513 JG	51
3701e513 JG	52	return true;
7750f403	53	}
22d1ba74 PM	54
	55	struct net_device vlan_dev_real_dev(const struct net_device dev)
	56	{
	57	return vlan_dev_info(dev)->real_dev;
	58	}
116cb428	59	EXPORT_SYMBOL(vlan_dev_real_dev);
22d1ba74 PM	60
	61	u16 vlan_dev_vlan_id(const struct net_device *dev)
	62	{
	63	return vlan_dev_info(dev)->vlan_id;
	64	}
116cb428	65	EXPORT_SYMBOL(vlan_dev_vlan_id);
e1c096e2	66
3701e513 JG	67	/* VLAN rx hw acceleration helper. This acts like netif_{rx,receive_skb}(). */
	68	int __vlan_hwaccel_rx(struct sk_buff skb, struct vlan_group grp,
	69	u16 vlan_tci, int polling)
e1c096e2	70	{
b93ab837	71	__vlan_hwaccel_put_tag(skb, vlan_tci);
3701e513	72	return polling ? netif_receive_skb(skb) : netif_rx(skb);
e1c096e2	73	}
3701e513	74	EXPORT_SYMBOL(__vlan_hwaccel_rx);
e1c096e2	75
c7c4b3b6 BH	76	gro_result_t vlan_gro_receive(struct napi_struct napi, struct vlan_group grp,
c7c4b3b6 BH	77	unsigned int vlan_tci, struct sk_buff *skb)
e1c096e2	78	{
3701e513 JG	79	__vlan_hwaccel_put_tag(skb, vlan_tci);
3701e513 JG	80	return napi_gro_receive(napi, skb);
e1c096e2 HX	81	}
	82	EXPORT_SYMBOL(vlan_gro_receive);
	83
c7c4b3b6 BH	84	gro_result_t vlan_gro_frags(struct napi_struct napi, struct vlan_group grp,
c7c4b3b6 BH	85	unsigned int vlan_tci)
e1c096e2	86	{
3701e513 JG	87	__vlan_hwaccel_put_tag(napi->skb, vlan_tci);
3701e513 JG	88	return napi_gro_frags(napi);
e1c096e2 HX	89	}
e1c096e2 HX	90	EXPORT_SYMBOL(vlan_gro_frags);