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gro: Check for GSO packets and packets with frag_list 

As GRO cannot be applied to packets with frag_list we need to
make sure that we reject such packets if they are fed to us,
e.g., through a tunnel device.

Also there is no point in applying GRO on GSO packets so they
too should be rejected.  This allows GRO to be used in virtio-net
which may produce GSO packets directly but may still benefit
from GRO if the other end of it doesn't support GSO.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Herbert Xu 2009-01-14 14:36:12 -08:00 committed by David S. Miller
parent 483a2b3a31
commit f17f5c91ae
1 changed files with 3 additions and 0 deletions
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3
net/core/dev.c
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@ -2392,6 +2392,9 @@ int dev_gro_receive(struct napi_struct *napi, struct sk_buff *skb)
if (!(skb->dev->features & NETIF_F_GRO))
goto normal;
if (skb_is_gso(skb) || skb_shinfo(skb)->frag_list)
goto normal;
rcu_read_lock();
list_for_each_entry_rcu(ptype, head, list) {
struct sk_buff *p;