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authorMichał Mirosław <mirq-linux@rere.qmqm.pl>2010-12-14 12:35:13 +0000
committerDavid S. Miller <davem@davemloft.net>2010-12-16 14:41:35 -0800
commit0b7967503dc97864f283a3a06fbe23e041876138 (patch)
tree66029b76d2d8f5fc74a3e8be0637b3814a0fd34a /drivers/net/veth.c
parent76d661586c8131453ba75a2e027c1f21511a893a (diff)
net/veth: Fix packet checksumming
We can't change ip_summed from CHECKSUM_PARTIAL to CHECKSUM_NONE or CHECKSUM_UNNECESSARY because checksum in packet's headers is not valid and will cause invalid checksum when frame is forwarded. Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/veth.c')
-rw-r--r--drivers/net/veth.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/net/veth.c b/drivers/net/veth.c
index 0bbc0c323135..cc83fa71c3ff 100644
--- a/drivers/net/veth.c
+++ b/drivers/net/veth.c
@@ -166,7 +166,9 @@ static netdev_tx_t veth_xmit(struct sk_buff *skb, struct net_device *dev)
if (!(rcv->flags & IFF_UP))
goto tx_drop;
- if (dev->features & NETIF_F_NO_CSUM)
+ /* don't change ip_summed == CHECKSUM_PARTIAL, as that
+ will cause bad checksum on forwarded packets */
+ if (skb->ip_summed == CHECKSUM_NONE)
skb->ip_summed = rcv_priv->ip_summed;
length = skb->len + ETH_HLEN;