Because the skb build code is not shared between xdp and non-xdp, and
the xdp code in receive_small() is simpler, so "skip_xdp" is not needed.
We can remove it.
Signed-off-by: Xuan Zhuo <xuanzhuo@xxxxxxxxxxxxxxxxx>
Acked-by: Jason Wang <jasowang@xxxxxxxxxx>
---
drivers/net/virtio_net.c | 26 ++++++++++++--------------
1 file changed, 12 insertions(+), 14 deletions(-)
diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index b26d907b5ba5..a0a4f35b965b 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -1028,13 +1028,12 @@ static struct sk_buff *receive_small(struct net_device *dev,
unsigned int *xdp_xmit,
struct virtnet_rq_stats *stats)
{
- struct sk_buff *skb;
- struct bpf_prog *xdp_prog;
unsigned int xdp_headroom = (unsigned long)ctx;
struct page *page = virt_to_head_page(buf);
unsigned int header_offset;
unsigned int headroom;
unsigned int buflen;
+ struct sk_buff *skb;
len -= vi->hdr_len;
stats->bytes += len;
@@ -1046,22 +1045,21 @@ static struct sk_buff *receive_small(struct net_device *dev,
goto err;
}
- 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) {
- skb = receive_small_xdp(dev, vi, rq, xdp_prog, buf, xdp_headroom,
- len, xdp_xmit, stats);
+ rcu_read_lock();
+ xdp_prog = rcu_dereference(rq->xdp_prog);
+ if (xdp_prog) {
+ skb = receive_small_xdp(dev, vi, rq, xdp_prog, buf,
+ xdp_headroom, len, xdp_xmit,
+ stats);
+ rcu_read_unlock();
+ return skb;
+ }
rcu_read_unlock();
- return skb;
}
- rcu_read_unlock();
-skip_xdp:
header_offset = VIRTNET_RX_PAD + xdp_headroom;
headroom = vi->hdr_len + header_offset;
buflen = SKB_DATA_ALIGN(GOOD_PACKET_LEN + headroom) +
--
2.32.0.3.g01195cf9f
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