On Wed, Dec 07, 2016 at 11:14:09PM +0800, Peng Tao wrote:
> So that we can cancel a queued pkt later if necessary.
> 
> Signed-off-by: Peng Tao <bergw...@gmail.com>
> ---
>  include/linux/virtio_vsock.h            | 2 ++
>  net/vmw_vsock/virtio_transport_common.c | 7 +++++++
>  2 files changed, 9 insertions(+)
> 
> diff --git a/include/linux/virtio_vsock.h b/include/linux/virtio_vsock.h
> index 9638bfe..6dd3242 100644
> --- a/include/linux/virtio_vsock.h
> +++ b/include/linux/virtio_vsock.h
> @@ -48,6 +48,7 @@ struct virtio_vsock_pkt {
>       struct virtio_vsock_hdr hdr;
>       struct work_struct work;
>       struct list_head list;
> +     struct vsock_sock *vsk;

To prevent future bugs, please add a comment here:
/* socket refcnt not held, only use for cancellation */

This field is just an opaque token used for cancellation rather than a
struct vsock_sock pointer that we are allowed to dereference.  You could
change this field to void *cancel_token to make the code harder to
misuse.

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