virtio-net: remove big packet XDP codes

Now we in fact don't allow XDP for big packets, remove its codes.

Cc: John Fastabend <john.r.fastabend@intel.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 41 deletions

diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index c1f66d8bfb7b..e53365a86ca3 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -344,11 +344,7 @@ static void virtnet_xdp_xmit(struct virtnet_info *vi,
         /* Free up any pending old buffers before queueing new ones. */
         while ((xdp_sent = virtqueue_get_buf(sq->vq, &len)) != NULL) {
                 struct page *sent_page = virt_to_head_page(xdp_sent);
-
-                if (vi->mergeable_rx_bufs)
-                        put_page(sent_page);
-                else
-                        give_pages(rq, sent_page);
+                put_page(sent_page);
         }
 
         /* Zero header and leave csum up to XDP layers */
@@ -360,15 +356,8 @@ static void virtnet_xdp_xmit(struct virtnet_info *vi,
         err = virtqueue_add_outbuf(sq->vq, sq->sg, num_sg,
                                    xdp->data, GFP_ATOMIC);
         if (unlikely(err)) {
-                if (vi->mergeable_rx_bufs)
-                        put_page(page);
-                else
-                        give_pages(rq, page);
+                put_page(page);
                 return; // On error abort to avoid unnecessary kick
-        } else if (!vi->mergeable_rx_bufs) {
-                /* If not mergeable bufs must be big packets so cleanup pages */
-                give_pages(rq, (struct page *)page->private);
-                page->private = 0;
         }
 
         virtqueue_kick(sq->vq);
@@ -430,44 +419,17 @@ static struct sk_buff *receive_big(struct net_device *dev,
                                    void *buf,
                                    unsigned int len)
 {
-        struct bpf_prog *xdp_prog;
         struct page *page = buf;
-        struct sk_buff *skb;
-
-        rcu_read_lock();
-        xdp_prog = rcu_dereference(rq->xdp_prog);
-        if (xdp_prog) {
-                struct virtio_net_hdr_mrg_rxbuf *hdr = buf;
-                u32 act;
-
-                if (unlikely(hdr->hdr.gso_type))
-                        goto err_xdp;
-                act = do_xdp_prog(vi, rq, xdp_prog, page, 0, len);
-                switch (act) {
-                case XDP_PASS:
-                        break;
-                case XDP_TX:
-                        rcu_read_unlock();
-                        goto xdp_xmit;
-                case XDP_DROP:
-                default:
-                        goto err_xdp;
-                }
-        }
-        rcu_read_unlock();
+        struct sk_buff *skb = page_to_skb(vi, rq, page, 0, len, PAGE_SIZE);
 
-        skb = page_to_skb(vi, rq, page, 0, len, PAGE_SIZE);
         if (unlikely(!skb))
                 goto err;
 
         return skb;
 
-err_xdp:
-        rcu_read_unlock();
 err:
         dev->stats.rx_dropped++;
         give_pages(rq, page);
-xdp_xmit:
         return NULL;
 }