This patch adds 2 new functions:
virtqueue_set_broken(): to be called when a virtqueue kick operation fails.
virtqueue_is_broken(): can be called to query the virtqueue state after a host
was kicked.
Signed-off-by: Heinz Graalfs <graalfs@xxxxxxxxxxxxxxxxxx>
---
drivers/virtio/virtio_ring.c | 16 ++++++++++++++++
include/linux/virtio.h | 4 ++++
2 files changed, 20 insertions(+)
diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c
index 5217baf..930ee39 100644
--- a/drivers/virtio/virtio_ring.c
+++ b/drivers/virtio/virtio_ring.c
@@ -836,4 +836,20 @@ unsigned int virtqueue_get_vring_size(struct virtqueue *_vq)
}
EXPORT_SYMBOL_GPL(virtqueue_get_vring_size);
+void virtqueue_set_broken(struct virtqueue *_vq)
+{
+ struct vring_virtqueue *vq = to_vvq(_vq);
+
+ vq->broken = true;
+}
+EXPORT_SYMBOL_GPL(virtqueue_set_broken);
+
+bool virtqueue_is_broken(struct virtqueue *_vq)
+{
+ struct vring_virtqueue *vq = to_vvq(_vq);
+
+ return vq->broken;
+}
+EXPORT_SYMBOL_GPL(virtqueue_is_broken);
+
MODULE_LICENSE("GPL");
diff --git a/include/linux/virtio.h b/include/linux/virtio.h
index 9ff8645..c09ae2b 100644
--- a/include/linux/virtio.h
+++ b/include/linux/virtio.h
@@ -76,6 +76,10 @@ void *virtqueue_detach_unused_buf(struct virtqueue *vq);
unsigned int virtqueue_get_vring_size(struct virtqueue *vq);
+void virtqueue_set_broken(struct virtqueue *vq);
+
+bool virtqueue_is_broken(struct virtqueue *vq);
+
/**
* virtio_device - representation of a device using virtio
* @index: unique position on the virtio bus
--
1.8.3.1
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