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virtio-net: unbreak csumed packets for XDP_PASS 

We drop csumed packet when do XDP for packets. This breaks
XDP_PASS when GUEST_CSUM is supported. Fix this by allowing csum flag
to be set. With this patch, simple TCP works for XDP_PASS.

Cc: John Fastabend <john.r.fastabend@intel.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Acked-by: John Fastabend <john.r.fastabend@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jason Wang 2016-12-23 22:37:28 +08:00 committed by David S. Miller
parent 1830f8935f
commit b00f70b0da
1 changed files with 2 additions and 2 deletions
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4
drivers/net/virtio_net.c
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@ -440,7 +440,7 @@ static struct sk_buff *receive_big(struct net_device *dev,
struct virtio_net_hdr_mrg_rxbuf *hdr = buf; struct virtio_net_hdr_mrg_rxbuf *hdr = buf;
u32 act; u32 act;
if (unlikely(hdr->hdr.gso_type || hdr->hdr.flags)) if (unlikely(hdr->hdr.gso_type))
goto err_xdp; goto err_xdp;
act = do_xdp_prog(vi, rq, xdp_prog, page, 0, len); act = do_xdp_prog(vi, rq, xdp_prog, page, 0, len);
switch (act) { switch (act) {
@ -572,7 +572,7 @@ static struct sk_buff *receive_mergeable(struct net_device *dev,
* the receive path after XDP is loaded. In practice I * the receive path after XDP is loaded. In practice I
* was not able to create this condition. * was not able to create this condition.
*/ */
if (unlikely(hdr->hdr.gso_type || hdr->hdr.flags)) if (unlikely(hdr->hdr.gso_type))
goto err_xdp; goto err_xdp;
act = do_xdp_prog(vi, rq, xdp_prog, xdp_page, offset, len); act = do_xdp_prog(vi, rq, xdp_prog, xdp_page, offset, len);