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Message-Id: <20240124085721.54442-3-liangchen.linux@gmail.com> Date: Wed, 24 Jan 2024 16:57:20 +0800 From: Liang Chen <liangchen.linux@...il.com> To: mst@...hat.com, jasowang@...hat.com, hengqi@...ux.alibaba.com, xuanzhuo@...ux.alibaba.com Cc: virtualization@...ts.linux-foundation.org, linux-kernel@...r.kernel.org, liangchen.linux@...il.com Subject: [PATCH v2 2/3] virtio_net: Add missing virtio header in skb for XDP_PASS For the XDP_PASS scenario of the XDP path, the skb constructed with xdp_buff does not include the virtio header. Adding the virtio header information back when creating the skb. Signed-off-by: Liang Chen <liangchen.linux@...il.com> --- drivers/net/virtio_net.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c index b56828804e5f..2de46eb4c661 100644 --- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c @@ -1270,6 +1270,9 @@ static struct sk_buff *receive_small_xdp(struct net_device *dev, if (unlikely(!skb)) goto err; + /* Store the original virtio header for subsequent use by the driver. */ + memcpy(skb_vnet_common_hdr(skb), &virtnet_xdp.hdr, vi->hdr_len); + if (metasize) skb_metadata_set(skb, metasize); @@ -1635,6 +1638,9 @@ static struct sk_buff *receive_mergeable_xdp(struct net_device *dev, head_skb = build_skb_from_xdp_buff(dev, vi, xdp, xdp_frags_truesz); if (unlikely(!head_skb)) break; + /* Store the original virtio header for subsequent use by the driver. */ + memcpy(skb_vnet_common_hdr(head_skb), &virtnet_xdp.hdr, vi->hdr_len); + return head_skb; case XDP_TX: -- 2.40.1
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