[dpdk-dev] [RFC 1/3] vhost: invalidate vring addresses in cleanup_vq()

[Jens Freimann]

On Thu, Feb 22, 2018 at 07:19:08PM +0100, Maxime Coquelin wrote:
>When cleaning-up the virtqueue, we also need to invalidate its
>addresses to be sure outdated addresses won't be used later.
>
>Signed-off-by: Maxime Coquelin <maxime.coquelin at redhat.com>
>---
> lib/librte_vhost/vhost.c      | 6 ++++--
> lib/librte_vhost/vhost.h      | 4 +++-
> lib/librte_vhost/vhost_user.c | 2 +-
> 3 files changed, 8 insertions(+), 4 deletions(-)
>
>diff --git a/lib/librte_vhost/vhost.c b/lib/librte_vhost/vhost.c
>index f6f12a03b..e4281cf67 100644
>--- a/lib/librte_vhost/vhost.c
>+++ b/lib/librte_vhost/vhost.c
>@@ -69,12 +69,14 @@ __vhost_iova_to_vva(struct virtio_net *dev, struct vhost_virtqueue *vq,
> }
>
> void
>-cleanup_vq(struct vhost_virtqueue *vq, int destroy)
>+cleanup_vq(struct virtio_net *dev, struct vhost_virtqueue *vq, int destroy)
> {
> 	if ((vq->callfd >= 0) && (destroy != 0))
> 		close(vq->callfd);
> 	if (vq->kickfd >= 0)
> 		close(vq->kickfd);
>+
>+	vring_invalidate(dev, vq);
> }
>
> /*
>@@ -89,7 +91,7 @@ cleanup_device(struct virtio_net *dev, int destroy)
> 	vhost_backend_cleanup(dev);
>
> 	for (i = 0; i < dev->nr_vring; i++)
>-		cleanup_vq(dev->virtqueue[i], destroy);
>+		cleanup_vq(dev, dev->virtqueue[i], destroy);
> }
>
> void
>diff --git a/lib/librte_vhost/vhost.h b/lib/librte_vhost/vhost.h
>index 58aec2e0d..4ebf84bec 100644
>--- a/lib/librte_vhost/vhost.h
>+++ b/lib/librte_vhost/vhost.h
>@@ -241,6 +241,7 @@ struct virtio_net {
> 	struct guest_page       *guest_pages;
>
> 	int			slave_req_fd;
>+	uint8_t		virtio_status;

Belongs into other patch?

Apart from that 
Reviewed-by: Jens Freimann <jfreimann at redhat.com> 

regards,
Jens