[Linux-kernel-mentees] [PATCHv2 net-next] dropwatch: Support monitoring of dropped frames

[David Miller]

From: izabela.bakollari at gmail.com
Date: Tue,  4 Aug 2020 18:09:08 +0200

> @@ -1315,6 +1334,53 @@ static int net_dm_cmd_trace(struct sk_buff *skb,
>  	return -EOPNOTSUPP;
>  }
>  
> +static int net_dm_interface_start(struct net *net, const char *ifname)
> +{
> +	struct net_device *nd = dev_get_by_name(net, ifname);
> +
> +	if (nd)
> +		interface = nd;
> +	else
> +		return -ENODEV;
> +
> +	return 0;
> +}
> +
> +static int net_dm_interface_stop(struct net *net, const char *ifname)
> +{
> +	dev_put(interface);
> +	interface = NULL;
> +
> +	return 0;
> +}

Where is the netdev notifier that will drop this reference if the network
device is unregistered?