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vlan: Enable software emulation for vlan accleration.

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Currently users of hardware vlan accleration need to know whether
the device supports it before generating packets.  However, vlan
acceleration will soon be available in a more flexible manner so
knowing ahead of time becomes much more difficult.  This adds
a software fallback path for vlan packets on devices without the
necessary offloading support, similar to other types of hardware
accleration.

Signed-off-by: Jesse Gross <jesse@nicira.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jesse Gross 2010-10-20 13:56:04 +00:00 • committed by David S. Miller
parent eab6d18d20
commit 7b9c609037
2 changed files with 44 additions and 6 deletions
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14
include/linux/netdevice.h
View file

@ -2248,9 +2248,17 @@ static inline int skb_gso_ok(struct sk_buff *skb, int features)
static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb)
{
return skb_is_gso(skb) &&
(!skb_gso_ok(skb, dev->features) ||
unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
if (skb_is_gso(skb)) {
int features = dev->features;
if (skb->protocol == htons(ETH_P_8021Q) || skb->vlan_tci)
features &= dev->vlan_features;
return (!skb_gso_ok(skb, features) ||
unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
}
return 0;
}
static inline void netif_set_gso_max_size(struct net_device *dev,