From b00f70b0dacb3d2e009afce860ebc90219072f5c Mon Sep 17 00:00:00 2001
From: Jason Wang <jasowang@redhat.com>
Date: Fri, 23 Dec 2016 22:37:28 +0800
Subject: [PATCH] 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>
---
drivers/net/virtio_net.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index 470293e2b84d4c..0778dc88597e1e 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -440,7 +440,7 @@ static struct sk_buff *receive_big(struct net_device *dev,
struct virtio_net_hdr_mrg_rxbuf *hdr = buf;
u32 act;
- if (unlikely(hdr->hdr.gso_type || hdr->hdr.flags))
+ if (unlikely(hdr->hdr.gso_type))
goto err_xdp;
act = do_xdp_prog(vi, rq, xdp_prog, page, 0, len);
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
* 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;
act = do_xdp_prog(vi, rq, xdp_prog, xdp_page, offset, len);
--
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