Re: [PATCH net-next v6 09/10] virtio_net: xsk: rx: support recv merge mode
From: Paolo Abeni <pabeni@redhat.com>
Date: 2024-06-20 10:37:51
Also in:
bpf, virtualization
On Tue, 2024-06-18 at 15:56 +0800, Xuan Zhuo wrote:
quoted hunk ↗ jump to hunk
Support AF-XDP for merge mode. Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com> --- drivers/net/virtio_net.c | 139 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 139 insertions(+)diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c index 06608d696e2e..cfa106aa8039 100644 --- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c@@ -504,6 +504,10 @@ static int virtnet_xdp_handler(struct bpf_prog *xdp_prog, struct xdp_buff *xdp, struct net_device *dev, unsigned int *xdp_xmit, struct virtnet_rq_stats *stats); +static struct sk_buff *virtnet_skb_append_frag(struct sk_buff *head_skb, + struct sk_buff *curr_skb, + struct page *page, void *buf, + int len, int truesize); static bool is_xdp_frame(void *ptr) {@@ -1128,6 +1132,139 @@ static struct sk_buff *virtnet_receive_xsk_small(struct net_device *dev, struct } } +static void xsk_drop_follow_bufs(struct net_device *dev, + struct receive_queue *rq, + u32 num_buf, + struct virtnet_rq_stats *stats) +{ + struct xdp_buff *xdp; + u32 len; + + while (num_buf-- > 1) {
Why do you skip the last buffer? I thought it should be dropped, too?!? Thanks! Paolo