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macvtap: Ignore tap features when VNET_HDR is off

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When the user turns off VNET_HDR support on the
macvtap device, there is no way to provide any
offload information to the user.  So, it's safer
to ignore offload setting then depend on the user
setting them correctly.

Signed-off-by: Vlad Yasevich <vyasevic@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vlad Yasevich 2013-08-16 15:25:02 -04:00 committed by David S. Miller
parent e558b0188b
commit e5733321d5
1 changed files with 4 additions and 2 deletions
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6
drivers/net/macvtap.c
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@ -290,9 +290,11 @@ static int macvtap_forward(struct net_device *dev, struct sk_buff *skb)
skb->dev = dev;
/* Apply the forward feature mask so that we perform segmentation
* according to users wishes.
* according to users wishes. This only works if VNET_HDR is
* enabled.
*/
features |= vlan->tap_features;
if (q->flags & IFF_VNET_HDR)
features |= vlan->tap_features;
if (netif_needs_gso(skb, features)) {
struct sk_buff *segs = __skb_gso_segment(skb, features, false);