[PATCH 27/33] virtio_net: virtnet_rq_free_unused_buf() check xsk buffer
From: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Date: 2023-02-02 11:02:10
Also in:
bpf, virtualization
Subsystem:
networking drivers, the rest · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
Since this will be called in other circumstances(freeze), we must check whether it is xsk's buffer in this function. It cannot be judged outside this function. Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com> --- drivers/net/virtio/main.c | 13 +++++++++++++ 1 file changed, 13 insertions(+)
diff --git a/drivers/net/virtio/main.c b/drivers/net/virtio/main.c
index ced9a37f706b..43249c78484a 100644
--- a/drivers/net/virtio/main.c
+++ b/drivers/net/virtio/main.c@@ -3296,8 +3296,21 @@ static void virtnet_sq_free_unused_buf(struct virtqueue *vq, void *buf) void virtnet_rq_free_unused_buf(struct virtqueue *vq, void *buf) { struct virtnet_info *vi = vq->vdev->priv; + struct xsk_buff_pool *pool; int i = vq2rxq(vq); + rcu_read_lock(); + pool = rcu_dereference(vi->rq[i].xsk.pool); + if (pool) { + struct xdp_buff *xdp; + + xdp = (struct xdp_buff *)buf; + xsk_buff_free(xdp); + rcu_read_unlock(); + return; + } + rcu_read_unlock(); + if (vi->mergeable_rx_bufs) put_page(virt_to_head_page(buf)); else if (vi->big_packets)
--
2.32.0.3.g01195cf9f