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

[Maxime Coquelin <maxime.coquelin@redhat.com>]

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addresses to be sure outdated addresses won't be used later.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@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;
 } __rte_cache_aligned;
 
 
@@ -362,7 +363,8 @@ void cleanup_device(struct virtio_net *dev, int destroy);
 void reset_device(struct virtio_net *dev);
 void vhost_destroy_device(int);
 
-void cleanup_vq(struct vhost_virtqueue *vq, int destroy);
+void cleanup_vq(struct virtio_net *dev, struct vhost_virtqueue *vq,
+				int destroy);
 void free_vq(struct vhost_virtqueue *vq);
 
 int alloc_vring_queue(struct virtio_net *dev, uint32_t vring_idx);
diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c
index 5c5361066..c256ebb06 100644
--- a/lib/librte_vhost/vhost_user.c
+++ b/lib/librte_vhost/vhost_user.c
@@ -219,7 +219,7 @@ vhost_user_set_features(struct virtio_net *dev, uint64_t features)
 				continue;
 
 			dev->virtqueue[dev->nr_vring] = NULL;
-			cleanup_vq(vq, 1);
+			cleanup_vq(dev, vq, 1);
 			free_vq(vq);
 		}
 	}
-- 
2.14.3