Arnd Bergmann wrote:
> diff --git a/drivers/net/macvtap.c b/drivers/net/macvtap.c
> new file mode 100644
> index 0000000..d99bfc0
> --- /dev/null
> +++ b/drivers/net/macvtap.c
> +static int macvtap_open(struct inode *inode, struct file *file)
> +{
> + struct net *net = current->nsproxy->net_ns;
> + int ifindex = iminor(inode);
> + struct net_device *dev = dev_get_by_index(net, ifindex);
> + int err;
> +
> + err = -ENODEV;
> + if (!dev)
> + goto out1;
> +
> + file->private_data = netdev_priv(dev);
> + err = 0;
> +out1:
> + return err;
> +}
macvlan will remove all macvlan/vtap devices when the underlying
device in unregistered, at which time you need to release the
device references you're holding. I'd suggest to change the
macvlan_device_event() handler to use
vlan->dev->rtnl_link_ops->dellink(vlan->dev)
instead of macvlan_dellink() so the macvtap_dellink callback
is invoked.
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