[deliverable/linux.git] / net / 8021q / vlan_core.c

#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)
{
	if (skb_bond_should_drop(skb))
		goto drop;

	skb->vlan_tci = vlan_tci;
	skb->dev = vlan_group_get_device(grp, vlan_tci & VLAN_VID_MASK);

	if (!skb->dev)
		goto drop;

	return (polling ? netif_receive_skb(skb) : netif_rx(skb));

drop:
	dev_kfree_skb_any(skb);
	return NET_RX_DROP;
}
EXPORT_SYMBOL(__vlan_hwaccel_rx);

int vlan_hwaccel_do_receive(struct sk_buff *skb)
{
	struct net_device *dev = skb->dev;
	struct net_device_stats *stats;

	skb->dev = vlan_dev_info(dev)->real_dev;
	netif_nit_deliver(skb);

	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(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);

static int vlan_gro_common(struct napi_struct *napi, struct vlan_group *grp,
			   unsigned int vlan_tci, struct sk_buff *skb)
{
	struct sk_buff *p;

	if (skb_bond_should_drop(skb))
		goto drop;

	skb->vlan_tci = vlan_tci;
	skb->dev = vlan_group_get_device(grp, vlan_tci & VLAN_VID_MASK);

	if (!skb->dev)
		goto drop;

	for (p = napi->gro_list; p; p = p->next) {
		NAPI_GRO_CB(p)->same_flow = p->dev == skb->dev;
		NAPI_GRO_CB(p)->flush = 0;
	}

	return dev_gro_receive(napi, skb);

drop:
	return 2;
}

int vlan_gro_receive(struct napi_struct *napi, struct vlan_group *grp,
		     unsigned int vlan_tci, struct sk_buff *skb)
{
	int err = NET_RX_SUCCESS;

	switch (vlan_gro_common(napi, grp, vlan_tci, skb)) {
	case -1:
		return netif_receive_skb(skb);

	case 2:
		err = NET_RX_DROP;
		/* fall through */

	case 1:
		kfree_skb(skb);
		break;
	}

	return err;
}
EXPORT_SYMBOL(vlan_gro_receive);

int vlan_gro_frags(struct napi_struct *napi, struct vlan_group *grp,
		   unsigned int vlan_tci, struct napi_gro_fraginfo *info)
{
	struct sk_buff *skb = napi_fraginfo_skb(napi, info);
	int err = NET_RX_DROP;

	if (!skb)
		goto out;

	err = NET_RX_SUCCESS;

	switch (vlan_gro_common(napi, grp, vlan_tci, skb)) {
	case -1:
		return netif_receive_skb(skb);

	case 2:
		err = NET_RX_DROP;
		/* fall through */

	case 1:
		napi_reuse_skb(napi, skb);
		break;
	}

out:
	return err;
}
EXPORT_SYMBOL(vlan_gro_frags);
Commit	Line	Data
	1	#include <linux/skbuff.h>
	2	#include <linux/netdevice.h>
	3	#include <linux/if_vlan.h>
	4	#include "vlan.h"
	5
	6	/* VLAN rx hw acceleration helper. This acts like netif_{rx,receive_skb}(). */
	7	int __vlan_hwaccel_rx(struct sk_buff skb, struct vlan_group grp,
	8	u16 vlan_tci, int polling)
	9	{
	10	if (skb_bond_should_drop(skb))
	11	goto drop;
	12
	13	skb->vlan_tci = vlan_tci;
	14	skb->dev = vlan_group_get_device(grp, vlan_tci & VLAN_VID_MASK);
	15
	16	if (!skb->dev)
	17	goto drop;
	18
	19	return (polling ? netif_receive_skb(skb) : netif_rx(skb));
	20
	21	drop:
	22	dev_kfree_skb_any(skb);
	23	return NET_RX_DROP;
	24	}
	25	EXPORT_SYMBOL(__vlan_hwaccel_rx);
	26
	27	int vlan_hwaccel_do_receive(struct sk_buff *skb)
	28	{
	29	struct net_device *dev = skb->dev;
	30	struct net_device_stats *stats;
	31
	32	skb->dev = vlan_dev_info(dev)->real_dev;
	33	netif_nit_deliver(skb);
	34
	35	skb->dev = dev;
	36	skb->priority = vlan_get_ingress_priority(dev, skb->vlan_tci);
	37	skb->vlan_tci = 0;
	38
	39	stats = &dev->stats;
	40	stats->rx_packets++;
	41	stats->rx_bytes += skb->len;
	42
	43	switch (skb->pkt_type) {
	44	case PACKET_BROADCAST:
	45	break;
	46	case PACKET_MULTICAST:
	47	stats->multicast++;
	48	break;
	49	case PACKET_OTHERHOST:
	50	/* Our lower layer thinks this is not local, let's make sure.
	51	* This allows the VLAN to have a different MAC than the
	52	* underlying device, and still route correctly. */
	53	if (!compare_ether_addr(eth_hdr(skb)->h_dest,
	54	dev->dev_addr))
	55	skb->pkt_type = PACKET_HOST;
	56	break;
	57	};
	58	return 0;
	59	}
	60
	61	struct net_device vlan_dev_real_dev(const struct net_device dev)
	62	{
	63	return vlan_dev_info(dev)->real_dev;
	64	}
	65	EXPORT_SYMBOL(vlan_dev_real_dev);
	66
	67	u16 vlan_dev_vlan_id(const struct net_device *dev)
	68	{
	69	return vlan_dev_info(dev)->vlan_id;
	70	}
	71	EXPORT_SYMBOL(vlan_dev_vlan_id);
	72
	73	static int vlan_gro_common(struct napi_struct napi, struct vlan_group grp,
	74	unsigned int vlan_tci, struct sk_buff *skb)
	75	{
	76	struct sk_buff *p;
	77
	78	if (skb_bond_should_drop(skb))
	79	goto drop;
	80
	81	skb->vlan_tci = vlan_tci;
	82	skb->dev = vlan_group_get_device(grp, vlan_tci & VLAN_VID_MASK);
	83
	84	if (!skb->dev)
	85	goto drop;
	86
	87	for (p = napi->gro_list; p; p = p->next) {
	88	NAPI_GRO_CB(p)->same_flow = p->dev == skb->dev;
	89	NAPI_GRO_CB(p)->flush = 0;
	90	}
	91
	92	return dev_gro_receive(napi, skb);
	93
	94	drop:
	95	return 2;
	96	}
	97
	98	int vlan_gro_receive(struct napi_struct napi, struct vlan_group grp,
	99	unsigned int vlan_tci, struct sk_buff *skb)
	100	{
	101	int err = NET_RX_SUCCESS;
	102
	103	switch (vlan_gro_common(napi, grp, vlan_tci, skb)) {
	104	case -1:
	105	return netif_receive_skb(skb);
	106
	107	case 2:
	108	err = NET_RX_DROP;
	109	/* fall through */
	110
	111	case 1:
	112	kfree_skb(skb);
	113	break;
	114	}
	115
	116	return err;
	117	}
	118	EXPORT_SYMBOL(vlan_gro_receive);
	119
	120	int vlan_gro_frags(struct napi_struct napi, struct vlan_group grp,
	121	unsigned int vlan_tci, struct napi_gro_fraginfo *info)
	122	{
	123	struct sk_buff *skb = napi_fraginfo_skb(napi, info);
	124	int err = NET_RX_DROP;
	125
	126	if (!skb)
	127	goto out;
	128
	129	err = NET_RX_SUCCESS;
	130
	131	switch (vlan_gro_common(napi, grp, vlan_tci, skb)) {
	132	case -1:
	133	return netif_receive_skb(skb);
	134
	135	case 2:
	136	err = NET_RX_DROP;
	137	/* fall through */
	138
	139	case 1:
	140	napi_reuse_skb(napi, skb);
	141	break;
	142	}
	143
	144	out:
	145	return err;
	146	}
	147	EXPORT_SYMBOL(vlan_gro_frags);