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7750f403 PM |
1 | #include <linux/skbuff.h> |
2 | #include <linux/netdevice.h> | |
3 | #include <linux/if_vlan.h> | |
4 | #include "vlan.h" | |
5 | ||
9b22ea56 PM |
6 | struct vlan_hwaccel_cb { |
7 | struct net_device *dev; | |
8 | }; | |
9 | ||
10 | static inline struct vlan_hwaccel_cb *vlan_hwaccel_cb(struct sk_buff *skb) | |
11 | { | |
12 | return (struct vlan_hwaccel_cb *)skb->cb; | |
13 | } | |
14 | ||
7750f403 PM |
15 | /* VLAN rx hw acceleration helper. This acts like netif_{rx,receive_skb}(). */ |
16 | int __vlan_hwaccel_rx(struct sk_buff *skb, struct vlan_group *grp, | |
9bb8582e | 17 | u16 vlan_tci, int polling) |
7750f403 | 18 | { |
9b22ea56 | 19 | struct vlan_hwaccel_cb *cb = vlan_hwaccel_cb(skb); |
7750f403 PM |
20 | |
21 | if (skb_bond_should_drop(skb)) { | |
22 | dev_kfree_skb_any(skb); | |
23 | return NET_RX_DROP; | |
24 | } | |
25 | ||
bc1d0411 | 26 | skb->vlan_tci = vlan_tci; |
9b22ea56 PM |
27 | cb->dev = vlan_group_get_device(grp, vlan_tci & VLAN_VID_MASK); |
28 | ||
29 | return (polling ? netif_receive_skb(skb) : netif_rx(skb)); | |
30 | } | |
31 | EXPORT_SYMBOL(__vlan_hwaccel_rx); | |
32 | ||
33 | int vlan_hwaccel_do_receive(struct sk_buff *skb) | |
34 | { | |
35 | struct vlan_hwaccel_cb *cb = vlan_hwaccel_cb(skb); | |
36 | struct net_device *dev = cb->dev; | |
37 | struct net_device_stats *stats; | |
38 | ||
bc1d0411 PM |
39 | netif_nit_deliver(skb); |
40 | ||
9b22ea56 PM |
41 | if (dev == NULL) { |
42 | kfree_skb(skb); | |
43 | return -1; | |
7750f403 | 44 | } |
9b22ea56 PM |
45 | |
46 | skb->dev = dev; | |
47 | skb->priority = vlan_get_ingress_priority(dev, skb->vlan_tci); | |
bc1d0411 | 48 | skb->vlan_tci = 0; |
7750f403 | 49 | |
9b22ea56 | 50 | stats = &dev->stats; |
7750f403 PM |
51 | stats->rx_packets++; |
52 | stats->rx_bytes += skb->len; | |
53 | ||
7750f403 PM |
54 | switch (skb->pkt_type) { |
55 | case PACKET_BROADCAST: | |
56 | break; | |
57 | case PACKET_MULTICAST: | |
58 | stats->multicast++; | |
59 | break; | |
60 | case PACKET_OTHERHOST: | |
61 | /* Our lower layer thinks this is not local, let's make sure. | |
62 | * This allows the VLAN to have a different MAC than the | |
63 | * underlying device, and still route correctly. */ | |
64 | if (!compare_ether_addr(eth_hdr(skb)->h_dest, | |
9b22ea56 | 65 | dev->dev_addr)) |
7750f403 PM |
66 | skb->pkt_type = PACKET_HOST; |
67 | break; | |
68 | }; | |
9b22ea56 | 69 | return 0; |
7750f403 | 70 | } |
22d1ba74 PM |
71 | |
72 | struct net_device *vlan_dev_real_dev(const struct net_device *dev) | |
73 | { | |
74 | return vlan_dev_info(dev)->real_dev; | |
75 | } | |
76 | EXPORT_SYMBOL_GPL(vlan_dev_real_dev); | |
77 | ||
78 | u16 vlan_dev_vlan_id(const struct net_device *dev) | |
79 | { | |
80 | return vlan_dev_info(dev)->vlan_id; | |
81 | } | |
82 | EXPORT_SYMBOL_GPL(vlan_dev_vlan_id); |