netdev - Re: [PATCH] net: ipv6: Remove addresses for failures with strict DAD

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Date:	Wed, 17 Aug 2016 17:40:31 +0200
From:	Hannes Frederic Sowa <hannes@...essinduktion.org>
To:	Mike Manning <mmanning@...cade.com>, netdev@...r.kernel.org
Subject: Re: [PATCH] net: ipv6: Remove addresses for failures with strict DAD

On 17.08.2016 12:28, Mike Manning wrote:
> +static void dev_disable_change(struct inet6_dev *idev);
>  
>  /*
>   *	Configured unicast address hash table
> @@ -1945,6 +1946,12 @@ lock_errdad:
>  
>  			pr_info("%s: IPv6 being disabled!\n",
>  				ifp->idev->dev->name);
> +			spin_unlock_bh(&ifp->lock);
> +			addrconf_dad_stop(ifp, 1);
> +			rtnl_lock();
> +			dev_disable_change(idev);
> +			rtnl_unlock();
> +			return;
>  		}
>  	}

You can't take rtnl_lock at that point but must postpone the actions and
do that in addrconf_dad_work.

Probably the whole ... else if (idev->cnf.accept_dad > 1 && ...) needs
to move there.

Bye,
Hannes