On 2017年06月28日 10:02, Michael S. Tsirkin wrote:
On Wed, Jun 28, 2017 at 09:54:03AM +0800, Jason Wang wrote:
We should allow csumed packet for small buffer, otherwise XDP_PASS
won't work correctly.
Fixes commit bb91accf2733 ("virtio-net: XDP support for small buffers")
Signed-off-by: Jason Wang <jasowang@xxxxxxxxxx>
The issue would be VIRTIO_NET_HDR_F_DATA_VALID might be set.
What do you think?
I think it's safe. For XDP_PASS, it work like in the past. For XDP_TX,
we zero the vnet header. For adjusting header, XDP prog should deal with
csum.
Thanks
---
The patch is needed for -stable.
---
drivers/net/virtio_net.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index 143d8a9..499fcc9 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -413,7 +413,7 @@ static struct sk_buff *receive_small(struct net_device *dev,
void *orig_data;
u32 act;
- if (unlikely(hdr->hdr.gso_type || hdr->hdr.flags))
+ if (unlikely(hdr->hdr.gso_type))
goto err_xdp;
xdp.data_hard_start = buf + VIRTNET_RX_PAD + vi->hdr_len;
--
2.7.4
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