Re: [RFC 05/10] vhost: Add vhost_dev_from_virtio

Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
---
  include/hw/virtio/vhost.h |  1 +
  hw/virtio/vhost.c         | 17 +++++++++++++++++
  2 files changed, 18 insertions(+)

diff --git a/include/hw/virtio/vhost.h b/include/hw/virtio/vhost.h
index 4a8bc75415..fca076e3f0 100644
--- a/include/hw/virtio/vhost.h
+++ b/include/hw/virtio/vhost.h

@@ -123,6 +123,7 @@ uint64_t vhost_get_features(struct vhost_dev *hdev, const int *feature_bits,
  void vhost_ack_features(struct vhost_dev *hdev, const int *feature_bits,
                          uint64_t features);
  bool vhost_has_free_slot(void);
+struct vhost_dev *vhost_dev_from_virtio(const VirtIODevice *vdev);
  
  int vhost_net_set_backend(struct vhost_dev *hdev,
                            struct vhost_vring_file *file);

diff --git a/hw/virtio/vhost.c b/hw/virtio/vhost.c
index 28c7d78172..8683d507f5 100644
--- a/hw/virtio/vhost.c
+++ b/hw/virtio/vhost.c

@@ -61,6 +61,23 @@ bool vhost_has_free_slot(void)
      return slots_limit > used_memslots;
  }
  
+/*
+ * Get the vhost device associated to a VirtIO device.
+ */
+struct vhost_dev *vhost_dev_from_virtio(const VirtIODevice *vdev)
+{
+    struct vhost_dev *hdev;
+
+    QLIST_FOREACH(hdev, &vhost_devices, entry) {
+        if (hdev->vdev == vdev) {
+            return hdev;
+        }
+    }
+
+    assert(hdev);
+    return NULL;
+}