1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
|
#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include <linux/if_vlan.h>
#include <linux/netpoll.h>
#include "vlan.h"
/* VLAN rx hw acceleration helper. This acts like netif_{rx,receive_skb}(). */
int __vlan_hwaccel_rx(struct sk_buff *skb, struct vlan_group *grp,
u16 vlan_tci, int polling)
{
struct net_device *vlan_dev;
u16 vlan_id;
if (netpoll_rx(skb))
return NET_RX_DROP;
if (skb_bond_should_drop(skb, ACCESS_ONCE(skb->dev->master)))
skb->deliver_no_wcard = 1;
skb->skb_iif = skb->dev->ifindex;
__vlan_hwaccel_put_tag(skb, vlan_tci);
vlan_id = vlan_tci & VLAN_VID_MASK;
vlan_dev = vlan_group_get_device(grp, vlan_id);
if (vlan_dev)
skb->dev = vlan_dev;
else if (vlan_id)
goto drop;
return (polling ? netif_receive_skb(skb) : netif_rx(skb));
drop:
dev_kfree_skb_any(skb);
return NET_RX_DROP;
}
EXPORT_SYMBOL(__vlan_hwaccel_rx);
void vlan_hwaccel_do_receive(struct sk_buff *skb)
{
struct net_device *dev = skb->dev;
struct vlan_rx_stats *rx_stats;
skb->dev = vlan_dev_real_dev(dev);
netif_nit_deliver(skb);
skb->dev = dev;
skb->priority = vlan_get_ingress_priority(dev, skb->vlan_tci);
skb->vlan_tci = 0;
rx_stats = this_cpu_ptr(vlan_dev_info(dev)->vlan_rx_stats);
u64_stats_update_begin(&rx_stats->syncp);
rx_stats->rx_packets++;
rx_stats->rx_bytes += skb->len;
switch (skb->pkt_type) {
case PACKET_BROADCAST:
break;
case PACKET_MULTICAST:
rx_stats->rx_multicast++;
break;
case PACKET_OTHERHOST:
/* Our lower layer thinks this is not local, let's make sure.
* This allows the VLAN to have a different MAC than the
* underlying device, and still route correctly. */
if (!compare_ether_addr(eth_hdr(skb)->h_dest,
dev->dev_addr))
skb->pkt_type = PACKET_HOST;
break;
}
u64_stats_update_end(&rx_stats->syncp);
}
struct net_device *vlan_dev_real_dev(const struct net_device *dev)
{
return vlan_dev_info(dev)->real_dev;
}
EXPORT_SYMBOL(vlan_dev_real_dev);
u16 vlan_dev_vlan_id(const struct net_device *dev)
{
return vlan_dev_info(dev)->vlan_id;
}
EXPORT_SYMBOL(vlan_dev_vlan_id);
static gro_result_t
vlan_gro_common(struct napi_struct *napi, struct vlan_group *grp,
unsigned int vlan_tci, struct sk_buff *skb)
{
struct sk_buff *p;
struct net_device *vlan_dev;
u16 vlan_id;
if (skb_bond_should_drop(skb, ACCESS_ONCE(skb->dev->master)))
skb->deliver_no_wcard = 1;
skb->skb_iif = skb->dev->ifindex;
__vlan_hwaccel_put_tag(skb, vlan_tci);
vlan_id = vlan_tci & VLAN_VID_MASK;
vlan_dev = vlan_group_get_device(grp, vlan_id);
if (vlan_dev)
skb->dev = vlan_dev;
else if (vlan_id)
goto drop;
for (p = napi->gro_list; p; p = p->next) {
unsigned long diffs;
diffs = (unsigned long)p->dev ^ (unsigned long)skb->dev;
diffs |= compare_ether_header(skb_mac_header(p),
skb_gro_mac_header(skb));
NAPI_GRO_CB(p)->same_flow = !diffs;
NAPI_GRO_CB(p)->flush = 0;
}
return dev_gro_receive(napi, skb);
drop:
return GRO_DROP;
}
gro_result_t vlan_gro_receive(struct napi_struct *napi, struct vlan_group *grp,
unsigned int vlan_tci, struct sk_buff *skb)
{
if (netpoll_rx_on(skb))
return vlan_hwaccel_receive_skb(skb, grp, vlan_tci)
? GRO_DROP : GRO_NORMAL;
skb_gro_reset_offset(skb);
return napi_skb_finish(vlan_gro_common(napi, grp, vlan_tci, skb), skb);
}
EXPORT_SYMBOL(vlan_gro_receive);
gro_result_t vlan_gro_frags(struct napi_struct *napi, struct vlan_group *grp,
unsigned int vlan_tci)
{
struct sk_buff *skb = napi_frags_skb(napi);
if (!skb)
return GRO_DROP;
if (netpoll_rx_on(skb)) {
skb->protocol = eth_type_trans(skb, skb->dev);
return vlan_hwaccel_receive_skb(skb, grp, vlan_tci)
? GRO_DROP : GRO_NORMAL;
}
return napi_frags_finish(napi, skb,
vlan_gro_common(napi, grp, vlan_tci, skb));
}
EXPORT_SYMBOL(vlan_gro_frags);
|
