91 lines
2.3 KiB
C
91 lines
2.3 KiB
C
#include <linux/skbuff.h>
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#include <linux/netdevice.h>
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#include <linux/if_vlan.h>
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#include <linux/netpoll.h>
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#include "vlan.h"
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bool vlan_hwaccel_do_receive(struct sk_buff **skbp)
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{
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struct sk_buff *skb = *skbp;
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u16 vlan_id = skb->vlan_tci & VLAN_VID_MASK;
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struct net_device *vlan_dev;
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struct vlan_pcpu_stats *rx_stats;
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vlan_dev = vlan_find_dev(skb->dev, vlan_id);
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if (!vlan_dev) {
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if (vlan_id)
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skb->pkt_type = PACKET_OTHERHOST;
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return false;
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}
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skb = *skbp = skb_share_check(skb, GFP_ATOMIC);
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if (unlikely(!skb))
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return false;
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skb->dev = vlan_dev;
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skb->priority = vlan_get_ingress_priority(vlan_dev, skb->vlan_tci);
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skb->vlan_tci = 0;
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rx_stats = this_cpu_ptr(vlan_dev_info(vlan_dev)->vlan_pcpu_stats);
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u64_stats_update_begin(&rx_stats->syncp);
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rx_stats->rx_packets++;
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rx_stats->rx_bytes += skb->len;
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switch (skb->pkt_type) {
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case PACKET_BROADCAST:
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break;
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case PACKET_MULTICAST:
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rx_stats->rx_multicast++;
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break;
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case PACKET_OTHERHOST:
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/* Our lower layer thinks this is not local, let's make sure.
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* This allows the VLAN to have a different MAC than the
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* underlying device, and still route correctly. */
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if (!compare_ether_addr(eth_hdr(skb)->h_dest,
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vlan_dev->dev_addr))
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skb->pkt_type = PACKET_HOST;
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break;
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}
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u64_stats_update_end(&rx_stats->syncp);
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return true;
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}
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struct net_device *vlan_dev_real_dev(const struct net_device *dev)
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{
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return vlan_dev_info(dev)->real_dev;
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}
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EXPORT_SYMBOL(vlan_dev_real_dev);
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u16 vlan_dev_vlan_id(const struct net_device *dev)
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{
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return vlan_dev_info(dev)->vlan_id;
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}
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EXPORT_SYMBOL(vlan_dev_vlan_id);
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/* VLAN rx hw acceleration helper. This acts like netif_{rx,receive_skb}(). */
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int __vlan_hwaccel_rx(struct sk_buff *skb, struct vlan_group *grp,
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u16 vlan_tci, int polling)
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{
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__vlan_hwaccel_put_tag(skb, vlan_tci);
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return polling ? netif_receive_skb(skb) : netif_rx(skb);
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}
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EXPORT_SYMBOL(__vlan_hwaccel_rx);
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gro_result_t vlan_gro_receive(struct napi_struct *napi, struct vlan_group *grp,
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unsigned int vlan_tci, struct sk_buff *skb)
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{
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__vlan_hwaccel_put_tag(skb, vlan_tci);
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return napi_gro_receive(napi, skb);
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}
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EXPORT_SYMBOL(vlan_gro_receive);
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gro_result_t vlan_gro_frags(struct napi_struct *napi, struct vlan_group *grp,
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unsigned int vlan_tci)
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{
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__vlan_hwaccel_put_tag(napi->skb, vlan_tci);
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return napi_gro_frags(napi);
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}
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EXPORT_SYMBOL(vlan_gro_frags);
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