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vhost: add vhost_net_set_backend()

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Not all vhost-user backends support ops->vhost_net_set_backend(). It is
a nicer to provide an assert/error than to crash trying to
call. Furthermore, it improves a bit the code by hiding vhost_ops
details.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Marc-André Lureau 2016-07-27 01:15:25 +04:00 • committed by Michael S. Tsirkin
parent f6b8571041
commit 950d94ba06
3 changed files with 17 additions and 6 deletions
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10
hw/virtio/vhost.c
View file

@ -1369,3 +1369,13 @@ void vhost_dev_stop(struct vhost_dev *hdev, VirtIODevice *vdev)
vhost_log_put(hdev, true);
hdev->started = false;
}
int vhost_net_set_backend(struct vhost_dev *hdev,
struct vhost_vring_file *file)
{
if (hdev->vhost_ops->vhost_net_set_backend) {
return hdev->vhost_ops->vhost_net_set_backend(hdev, file);
}
return -1;
}