On Tue, Apr 18, 2023 at 2:53 PM Xuan Zhuo <xuanzhuo@xxxxxxxxxxxxxxxxx> wrote:
>
> Now, the logic of merge xdp process is simple, we can remove the
> skip_xdp.
>
> Signed-off-by: Xuan Zhuo <xuanzhuo@xxxxxxxxxxxxxxxxx>
Acked-by: Jason Wang <jasowang@xxxxxxxxxx>
Thanks
> ---
> drivers/net/virtio_net.c | 23 ++++++++++-------------
> 1 file changed, 10 insertions(+), 13 deletions(-)
>
> diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
> index 42e9927e316b..a4bb25f39f12 100644
> --- a/drivers/net/virtio_net.c
> +++ b/drivers/net/virtio_net.c
> @@ -1390,7 +1390,6 @@ static struct sk_buff *receive_mergeable(struct net_device *dev,
> struct page *page = virt_to_head_page(buf);
> int offset = buf - page_address(page);
> struct sk_buff *head_skb, *curr_skb;
> - struct bpf_prog *xdp_prog;
> unsigned int truesize = mergeable_ctx_to_truesize(ctx);
> unsigned int headroom = mergeable_ctx_to_headroom(ctx);
> unsigned int tailroom = headroom ? sizeof(struct skb_shared_info) : 0;
> @@ -1406,22 +1405,20 @@ static struct sk_buff *receive_mergeable(struct net_device *dev,
> goto err_skb;
> }
>
> - if (likely(!vi->xdp_enabled)) {
> - xdp_prog = NULL;
> - goto skip_xdp;
> - }
> + if (unlikely(vi->xdp_enabled)) {
> + struct bpf_prog *xdp_prog;
>
> - rcu_read_lock();
> - xdp_prog = rcu_dereference(rq->xdp_prog);
> - if (xdp_prog) {
> - head_skb = receive_mergeable_xdp(dev, vi, rq, xdp_prog, buf, ctx,
> - len, xdp_xmit, stats);
> + rcu_read_lock();
> + xdp_prog = rcu_dereference(rq->xdp_prog);
> + if (xdp_prog) {
> + head_skb = receive_mergeable_xdp(dev, vi, rq, xdp_prog, buf, ctx,
> + len, xdp_xmit, stats);
> + rcu_read_unlock();
> + return head_skb;
> + }
> rcu_read_unlock();
> - return head_skb;
> }
> - rcu_read_unlock();
>
> -skip_xdp:
> head_skb = page_to_skb(vi, rq, page, offset, len, truesize, headroom);
> curr_skb = head_skb;
>
> --
> 2.32.0.3.g01195cf9f
>
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