netdev - Re: [patch net-next v3 1/3] net: devlink: allow to change namespaces

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Date:   Tue, 13 Aug 2019 08:13:55 +0200
From:   Jiri Pirko <jiri@...nulli.us>
To:     Jakub Kicinski <jakub.kicinski@...ronome.com>
Cc:     netdev@...r.kernel.org, davem@...emloft.net,
        stephen@...workplumber.org, dsahern@...il.com, mlxsw@...lanox.com
Subject: Re: [patch net-next v3 1/3] net: devlink: allow to change namespaces

Tue, Aug 13, 2019 at 03:21:22AM CEST, jakub.kicinski@...ronome.com wrote:
>On Mon, 12 Aug 2019 15:47:49 +0200, Jiri Pirko wrote:
>> @@ -6953,9 +7089,33 @@ int devlink_compat_switch_id_get(struct net_device *dev,
>>  	return 0;
>>  }
>>  
>> +static void __net_exit devlink_pernet_exit(struct net *net)
>> +{
>> +	struct devlink *devlink;
>> +
>> +	mutex_lock(&devlink_mutex);
>> +	list_for_each_entry(devlink, &devlink_list, list)
>> +		if (net_eq(devlink_net(devlink), net))
>> +			devlink_netns_change(devlink, &init_net);
>> +	mutex_unlock(&devlink_mutex);
>> +}
>
>Just to be sure - this will not cause any locking issues?
>Usually the locking order goes devlink -> rtnl

rtnl is not taken. Do I miss something?