| | 1 | #include <linux/skbuff.h> |
| | 2 | #include <linux/netdevice.h> |
| | 3 | #include <linux/if_vlan.h> |
| | 4 | #include <linux/netpoll.h> |
| | 5 | #include "vlan.h" |
| | 6 | |
| | 7 | bool vlan_hwaccel_do_receive(struct sk_buff **skbp) |
| | 8 | { |
| | 9 | struct sk_buff *skb = *skbp; |
| | 10 | u16 vlan_id = skb->vlan_tci & VLAN_VID_MASK; |
| | 11 | struct net_device *vlan_dev; |
| | 12 | struct vlan_pcpu_stats *rx_stats; |
| | 13 | |
| | 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; |
| | 19 | } |
| | 20 | |
| | 21 | skb = *skbp = skb_share_check(skb, GFP_ATOMIC); |
| | 22 | if (unlikely(!skb)) |
| | 23 | return false; |
| | 24 | |
| | 25 | skb->dev = vlan_dev; |
| | 26 | skb->priority = vlan_get_ingress_priority(vlan_dev, skb->vlan_tci); |
| | 27 | skb->vlan_tci = 0; |
| | 28 | |
| | 29 | rx_stats = this_cpu_ptr(vlan_dev_info(vlan_dev)->vlan_pcpu_stats); |
| | 30 | |
| | 31 | u64_stats_update_begin(&rx_stats->syncp); |
| | 32 | rx_stats->rx_packets++; |
| | 33 | rx_stats->rx_bytes += skb->len; |
| | 34 | |
| | 35 | switch (skb->pkt_type) { |
| | 36 | case PACKET_BROADCAST: |
| | 37 | break; |
| | 38 | case PACKET_MULTICAST: |
| | 39 | rx_stats->rx_multicast++; |
| | 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, |
| | 46 | vlan_dev->dev_addr)) |
| | 47 | skb->pkt_type = PACKET_HOST; |
| | 48 | break; |
| | 49 | } |
| | 50 | u64_stats_update_end(&rx_stats->syncp); |
| | 51 | |
| | 52 | return true; |
| | 53 | } |
| | 54 | |
| | 55 | struct net_device *vlan_dev_real_dev(const struct net_device *dev) |
| | 56 | { |
| | 57 | return vlan_dev_info(dev)->real_dev; |
| | 58 | } |
| | 59 | EXPORT_SYMBOL(vlan_dev_real_dev); |
| | 60 | |
| | 61 | u16 vlan_dev_vlan_id(const struct net_device *dev) |
| | 62 | { |
| | 63 | return vlan_dev_info(dev)->vlan_id; |
| | 64 | } |
| | 65 | EXPORT_SYMBOL(vlan_dev_vlan_id); |
| | 66 | |
| | 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) |
| | 70 | { |
| | 71 | __vlan_hwaccel_put_tag(skb, vlan_tci); |
| | 72 | return polling ? netif_receive_skb(skb) : netif_rx(skb); |
| | 73 | } |
| | 74 | EXPORT_SYMBOL(__vlan_hwaccel_rx); |
| | 75 | |
| | 76 | gro_result_t vlan_gro_receive(struct napi_struct *napi, struct vlan_group *grp, |
| | 77 | unsigned int vlan_tci, struct sk_buff *skb) |
| | 78 | { |
| | 79 | __vlan_hwaccel_put_tag(skb, vlan_tci); |
| | 80 | return napi_gro_receive(napi, skb); |
| | 81 | } |
| | 82 | EXPORT_SYMBOL(vlan_gro_receive); |
| | 83 | |
| | 84 | gro_result_t vlan_gro_frags(struct napi_struct *napi, struct vlan_group *grp, |
| | 85 | unsigned int vlan_tci) |
| | 86 | { |
| | 87 | __vlan_hwaccel_put_tag(napi->skb, vlan_tci); |
| | 88 | return napi_gro_frags(napi); |
| | 89 | } |
| | 90 | EXPORT_SYMBOL(vlan_gro_frags); |
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