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authorJason Wang <jasowang@redhat.com>2016-12-23 22:37:31 +0800
committerDavid S. Miller <davem@davemloft.net>2016-12-23 13:48:55 -0500
commitc47a43d3004ad6ff2a94a670cb3274cd6338d41e (patch)
tree5c0eb7b398598e3b5d1684c9f3648e00c9924155 /drivers/net
parent92502fe86c7c9b3f8543f29641a3c71805e82757 (diff)
downloadlinux-c47a43d3004ad6ff2a94a670cb3274cd6338d41e.tar.bz2
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>
Diffstat (limited to 'drivers/net')
-rw-r--r--drivers/net/virtio_net.c44
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;
}