netdev - Re: ipv6: Should inet6_addr_del consider IFA_F

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Date:	Tue, 08 Apr 2014 21:08:09 +0200
From:	Heiner Kallweit <heiner.kallweit@....de>
To:	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Re: ipv6: Should inet6_addr_del consider IFA_F_MANAGETEMPADDR?

Am 08.04.2014 20:26, schrieb Heiner Kallweit:
> I stumbled accross the fact that inet6_addr_add as well as inet6_addr_modify
> consider IFA_F_TEMPORARY whilst inet6_addr_del does not.
>
> My understanding of IFA_F_MANAGETEMPADDR is that it allows userspace applications
> to deal with temporary addresses w/o having to create / track (and possibly delete)
> each and every temporary address.
>
> This works fine when creating / modifying a global address. However when a
> global address is deleted the orphaned temporary addresses remain.
> Shouldn't the userspace be able to set IFA_F_MANAGETEMPADDR also for RTM_DELADDR
> to signalize that the kernel should delete all related temporary addresses as well?
>
> It would be a rather small extension to manage_tempaddrs to add a "delete" parameter
> and set valid_lft=prefered_lft=0 for each temporary address if set.
>
> Sorry if this was discussed before and I miss something.
>
> Rgds,
> Heiner
>
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Sorry, there is a typo. Of course IFA_F_MANAGETEMPADDR is meant in the first sentence too.

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