virtio: add names to virtqueue struct, mapping from devices to queues.

Add a linked list of all virtqueues for a virtio device: this helps for
debugging and is also needed for upcoming interface change.

Also, add a "name" field for clearer debug messages.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

1 files changed, 3 insertions, 2 deletions

diff --git a/drivers/lguest/lguest_device.c b/drivers/lguest/lguest_device.c
index df44d962626..4babed899d5 100644
--- a/drivers/lguest/lguest_device.c
+++ b/drivers/lguest/lguest_device.c
@@ -228,7 +228,8 @@ extern void lguest_setup_irq(unsigned int irq);
  * function. */
 static struct virtqueue *lg_find_vq(struct virtio_device *vdev,
                                     unsigned index,
-                                    void (*callback)(struct virtqueue *vq))
+                                    void (*callback)(struct virtqueue *vq),
+                                    const char *name)
 {
         struct lguest_device *ldev = to_lgdev(vdev);
         struct lguest_vq_info *lvq;
@@ -263,7 +264,7 @@ static struct virtqueue *lg_find_vq(struct virtio_device *vdev,
         /* OK, tell virtio_ring.c to set up a virtqueue now we know its size
          * and we've got a pointer to its pages. */
         vq = vring_new_virtqueue(lvq->config.num, LGUEST_VRING_ALIGN,
-                                 vdev, lvq->pages, lg_notify, callback);
+                                 vdev, lvq->pages, lg_notify, callback, name);
         if (!vq) {
                 err = -ENOMEM;
                 goto unmap;