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Commit | Line | Data |
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7750f403 PM |
1 | #include <linux/skbuff.h> |
2 | #include <linux/netdevice.h> | |
3 | #include <linux/if_vlan.h> | |
4ead4431 | 4 | #include <linux/netpoll.h> |
7750f403 PM |
5 | #include "vlan.h" |
6 | ||
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, | |
9bb8582e | 9 | u16 vlan_tci, int polling) |
7750f403 | 10 | { |
4ead4431 HX |
11 | if (netpoll_rx(skb)) |
12 | return NET_RX_DROP; | |
13 | ||
e1c096e2 HX |
14 | if (skb_bond_should_drop(skb)) |
15 | goto drop; | |
7750f403 | 16 | |
bc1d0411 | 17 | skb->vlan_tci = vlan_tci; |
e1c096e2 HX |
18 | skb->dev = vlan_group_get_device(grp, vlan_tci & VLAN_VID_MASK); |
19 | ||
20 | if (!skb->dev) | |
21 | goto drop; | |
9b22ea56 PM |
22 | |
23 | return (polling ? netif_receive_skb(skb) : netif_rx(skb)); | |
e1c096e2 HX |
24 | |
25 | drop: | |
26 | dev_kfree_skb_any(skb); | |
27 | return NET_RX_DROP; | |
9b22ea56 PM |
28 | } |
29 | EXPORT_SYMBOL(__vlan_hwaccel_rx); | |
30 | ||
31 | int vlan_hwaccel_do_receive(struct sk_buff *skb) | |
32 | { | |
e1c096e2 | 33 | struct net_device *dev = skb->dev; |
9b22ea56 PM |
34 | struct net_device_stats *stats; |
35 | ||
e1c096e2 | 36 | skb->dev = vlan_dev_info(dev)->real_dev; |
bc1d0411 PM |
37 | netif_nit_deliver(skb); |
38 | ||
9b22ea56 PM |
39 | skb->dev = dev; |
40 | skb->priority = vlan_get_ingress_priority(dev, skb->vlan_tci); | |
bc1d0411 | 41 | skb->vlan_tci = 0; |
7750f403 | 42 | |
9b22ea56 | 43 | stats = &dev->stats; |
7750f403 PM |
44 | stats->rx_packets++; |
45 | stats->rx_bytes += skb->len; | |
46 | ||
7750f403 PM |
47 | switch (skb->pkt_type) { |
48 | case PACKET_BROADCAST: | |
49 | break; | |
50 | case PACKET_MULTICAST: | |
51 | stats->multicast++; | |
52 | break; | |
53 | case PACKET_OTHERHOST: | |
54 | /* Our lower layer thinks this is not local, let's make sure. | |
55 | * This allows the VLAN to have a different MAC than the | |
56 | * underlying device, and still route correctly. */ | |
57 | if (!compare_ether_addr(eth_hdr(skb)->h_dest, | |
9b22ea56 | 58 | dev->dev_addr)) |
7750f403 PM |
59 | skb->pkt_type = PACKET_HOST; |
60 | break; | |
61 | }; | |
9b22ea56 | 62 | return 0; |
7750f403 | 63 | } |
22d1ba74 PM |
64 | |
65 | struct net_device *vlan_dev_real_dev(const struct net_device *dev) | |
66 | { | |
67 | return vlan_dev_info(dev)->real_dev; | |
68 | } | |
116cb428 | 69 | EXPORT_SYMBOL(vlan_dev_real_dev); |
22d1ba74 PM |
70 | |
71 | u16 vlan_dev_vlan_id(const struct net_device *dev) | |
72 | { | |
73 | return vlan_dev_info(dev)->vlan_id; | |
74 | } | |
116cb428 | 75 | EXPORT_SYMBOL(vlan_dev_vlan_id); |
e1c096e2 | 76 | |
5b252f0c BH |
77 | static gro_result_t |
78 | vlan_gro_common(struct napi_struct *napi, struct vlan_group *grp, | |
79 | unsigned int vlan_tci, struct sk_buff *skb) | |
e1c096e2 HX |
80 | { |
81 | struct sk_buff *p; | |
82 | ||
83 | if (skb_bond_should_drop(skb)) | |
84 | goto drop; | |
85 | ||
86 | skb->vlan_tci = vlan_tci; | |
87 | skb->dev = vlan_group_get_device(grp, vlan_tci & VLAN_VID_MASK); | |
88 | ||
89 | if (!skb->dev) | |
90 | goto drop; | |
91 | ||
92 | for (p = napi->gro_list; p; p = p->next) { | |
aa4b9f53 HX |
93 | NAPI_GRO_CB(p)->same_flow = |
94 | p->dev == skb->dev && !compare_ether_header( | |
95 | skb_mac_header(p), skb_gro_mac_header(skb)); | |
e1c096e2 HX |
96 | NAPI_GRO_CB(p)->flush = 0; |
97 | } | |
98 | ||
99 | return dev_gro_receive(napi, skb); | |
100 | ||
101 | drop: | |
d1c76af9 | 102 | return GRO_DROP; |
e1c096e2 HX |
103 | } |
104 | ||
c7c4b3b6 BH |
105 | gro_result_t vlan_gro_receive(struct napi_struct *napi, struct vlan_group *grp, |
106 | unsigned int vlan_tci, struct sk_buff *skb) | |
e1c096e2 | 107 | { |
2ffb4558 | 108 | if (netpoll_rx_on(skb)) |
c7c4b3b6 BH |
109 | return vlan_hwaccel_receive_skb(skb, grp, vlan_tci) |
110 | ? GRO_DROP : GRO_NORMAL; | |
2ffb4558 | 111 | |
86911732 HX |
112 | skb_gro_reset_offset(skb); |
113 | ||
5d0d9be8 | 114 | return napi_skb_finish(vlan_gro_common(napi, grp, vlan_tci, skb), skb); |
e1c096e2 HX |
115 | } |
116 | EXPORT_SYMBOL(vlan_gro_receive); | |
117 | ||
c7c4b3b6 BH |
118 | gro_result_t vlan_gro_frags(struct napi_struct *napi, struct vlan_group *grp, |
119 | unsigned int vlan_tci) | |
e1c096e2 | 120 | { |
76620aaf | 121 | struct sk_buff *skb = napi_frags_skb(napi); |
e1c096e2 HX |
122 | |
123 | if (!skb) | |
c7c4b3b6 | 124 | return GRO_DROP; |
e1c096e2 | 125 | |
1db9e29b HX |
126 | if (netpoll_rx_on(skb)) { |
127 | skb->protocol = eth_type_trans(skb, skb->dev); | |
c7c4b3b6 BH |
128 | return vlan_hwaccel_receive_skb(skb, grp, vlan_tci) |
129 | ? GRO_DROP : GRO_NORMAL; | |
1db9e29b | 130 | } |
2ffb4558 | 131 | |
5d0d9be8 HX |
132 | return napi_frags_finish(napi, skb, |
133 | vlan_gro_common(napi, grp, vlan_tci, skb)); | |
e1c096e2 HX |
134 | } |
135 | EXPORT_SYMBOL(vlan_gro_frags); |