1 #include <linux/skbuff.h>
2 #include <linux/netdevice.h>
3 #include <linux/if_vlan.h>
4 #include <linux/netpoll.h>
7 /* VLAN rx hw acceleration helper. This acts like netif_{rx,receive_skb}(). */
8 int __vlan_hwaccel_rx(struct sk_buff *skb, struct vlan_group *grp,
9 u16 vlan_tci, int polling)
11 struct net_device *vlan_dev;
17 if (skb_bond_should_drop(skb, ACCESS_ONCE(skb->dev->master)))
18 skb->deliver_no_wcard = 1;
20 skb->skb_iif = skb->dev->ifindex;
21 __vlan_hwaccel_put_tag(skb, vlan_tci);
22 vlan_id = vlan_tci & VLAN_VID_MASK;
23 vlan_dev = vlan_group_get_device(grp, vlan_id);
30 return polling ? netif_receive_skb(skb) : netif_rx(skb);
33 dev_kfree_skb_any(skb);
36 EXPORT_SYMBOL(__vlan_hwaccel_rx);
38 void vlan_hwaccel_do_receive(struct sk_buff *skb)
40 struct net_device *dev = skb->dev;
41 struct vlan_rx_stats *rx_stats;
43 skb->dev = vlan_dev_real_dev(dev);
44 netif_nit_deliver(skb);
47 skb->priority = vlan_get_ingress_priority(dev, skb->vlan_tci);
50 rx_stats = this_cpu_ptr(vlan_dev_info(dev)->vlan_rx_stats);
52 u64_stats_update_begin(&rx_stats->syncp);
53 rx_stats->rx_packets++;
54 rx_stats->rx_bytes += skb->len;
56 switch (skb->pkt_type) {
57 case PACKET_BROADCAST:
59 case PACKET_MULTICAST:
60 rx_stats->rx_multicast++;
62 case PACKET_OTHERHOST:
63 /* Our lower layer thinks this is not local, let's make sure.
64 * This allows the VLAN to have a different MAC than the
65 * underlying device, and still route correctly. */
66 if (!compare_ether_addr(eth_hdr(skb)->h_dest,
68 skb->pkt_type = PACKET_HOST;
71 u64_stats_update_end(&rx_stats->syncp);
74 struct net_device *vlan_dev_real_dev(const struct net_device *dev)
76 return vlan_dev_info(dev)->real_dev;
78 EXPORT_SYMBOL(vlan_dev_real_dev);
80 u16 vlan_dev_vlan_id(const struct net_device *dev)
82 return vlan_dev_info(dev)->vlan_id;
84 EXPORT_SYMBOL(vlan_dev_vlan_id);
87 vlan_gro_common(struct napi_struct *napi, struct vlan_group *grp,
88 unsigned int vlan_tci, struct sk_buff *skb)
91 struct net_device *vlan_dev;
94 if (skb_bond_should_drop(skb, ACCESS_ONCE(skb->dev->master)))
95 skb->deliver_no_wcard = 1;
97 skb->skb_iif = skb->dev->ifindex;
98 __vlan_hwaccel_put_tag(skb, vlan_tci);
99 vlan_id = vlan_tci & VLAN_VID_MASK;
100 vlan_dev = vlan_group_get_device(grp, vlan_id);
107 for (p = napi->gro_list; p; p = p->next) {
110 diffs = (unsigned long)p->dev ^ (unsigned long)skb->dev;
111 diffs |= compare_ether_header(skb_mac_header(p),
112 skb_gro_mac_header(skb));
113 NAPI_GRO_CB(p)->same_flow = !diffs;
114 NAPI_GRO_CB(p)->flush = 0;
117 return dev_gro_receive(napi, skb);
123 gro_result_t vlan_gro_receive(struct napi_struct *napi, struct vlan_group *grp,
124 unsigned int vlan_tci, struct sk_buff *skb)
126 if (netpoll_rx_on(skb))
127 return vlan_hwaccel_receive_skb(skb, grp, vlan_tci)
128 ? GRO_DROP : GRO_NORMAL;
130 skb_gro_reset_offset(skb);
132 return napi_skb_finish(vlan_gro_common(napi, grp, vlan_tci, skb), skb);
134 EXPORT_SYMBOL(vlan_gro_receive);
136 gro_result_t vlan_gro_frags(struct napi_struct *napi, struct vlan_group *grp,
137 unsigned int vlan_tci)
139 struct sk_buff *skb = napi_frags_skb(napi);
144 if (netpoll_rx_on(skb)) {
145 skb->protocol = eth_type_trans(skb, skb->dev);
146 return vlan_hwaccel_receive_skb(skb, grp, vlan_tci)
147 ? GRO_DROP : GRO_NORMAL;
150 return napi_frags_finish(napi, skb,
151 vlan_gro_common(napi, grp, vlan_tci, skb));
153 EXPORT_SYMBOL(vlan_gro_frags);