On Wed, Dec 07, 2016 at 06:00:20PM +0800, Peng Tao wrote:
> Signed-off-by: Peng Tao <bergwolf@xxxxxxxxx>
> ---
> net/vmw_vsock/virtio_transport.c | 36 ++++++++++++++++++++++++++++++++++++
> 1 file changed, 36 insertions(+)
>
> diff --git a/net/vmw_vsock/virtio_transport.c b/net/vmw_vsock/virtio_transport.c
> index 936d7ee..f88b6ed 100644
> --- a/net/vmw_vsock/virtio_transport.c
> +++ b/net/vmw_vsock/virtio_transport.c
> @@ -170,6 +170,41 @@ virtio_transport_send_pkt(struct virtio_vsock_pkt *pkt)
> return len;
> }
>
> +static int
> +virtio_transport_cancel_pkt(struct vsock_sock *vsk)
> +{
> + struct virtio_vsock *vsock;
> + struct virtio_vsock_pkt *pkt, *n;
> + int cnt = 0;
> + LIST_HEAD(freeme);
> +
> + vsock = virtio_vsock_get();
> + if (!vsock) {
> + return -ENODEV;
> + }
> +
> + if (pkt->reply)
pkt is uninitialized. I guess this if statement should be deleted, you
already take care of counting reply packets below.
> + cnt++;
> +
> + spin_lock_bh(&vsock->send_pkt_list_lock);
> + list_for_each_entry_safe(pkt, n, &vsock->send_pkt_list, list) {
> + if (pkt->vsk != vsk)
> + continue;
> + list_move(&pkt->list, &freeme);
> + }
> + spin_unlock_bh(&vsock->send_pkt_list_lock);
> +
> + list_for_each_entry_safe(pkt, n, &freeme, list) {
> + if (pkt->reply)
> + cnt++;
> + list_del(&pkt->list);
> + virtio_transport_free_pkt(pkt);
> + }
> + atomic_sub(cnt, &vsock->queued_replies);
If we stopped rx because there were too many replies in flight then we
might be able to resume rx now:
/* Do we now have resources to resume rx processing? */
if (old_val >= virtqueue_get_vring_size(rx_vq) &&
new_val < virtqueue_get_vring_size(rx_vq))
queue_work(virtio_vsock_workqueue, &vsock->rx_work);
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