netdev - Re: [patch net-next RFC v2 1/2] ipv6 addrconf: extend ifa

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Date:	Wed, 20 Nov 2013 15:08:29 +0100
From:	Jiri Pirko <jiri@...nulli.us>
To:	David Miller <davem@...emloft.net>
Cc:	netdev@...r.kernel.org, kuznet@....inr.ac.ru, jmorris@...ei.org,
	yoshfuji@...ux-ipv6.org, kaber@...sh.net, thaller@...hat.com,
	stephen@...workplumber.org, hannes@...essinduktion.org,
	vyasevich@...il.com, dcbw@...hat.com, David.Laight@...LAB.COM
Subject: Re: [patch net-next RFC v2 1/2] ipv6 addrconf: extend ifa_flags to
 u32

Tue, Nov 19, 2013 at 10:16:53PM CET, davem@...emloft.net wrote:
>From: Jiri Pirko <jiri@...nulli.us>
>Date: Tue, 19 Nov 2013 11:43:28 +0100
>
>> There is no more space in u8 ifa_flags. So do what davem suffested and
>> add another netlink attr called IFA_FLAGS for carry more flags.
>> 
>> Signed-off-by: Jiri Pirko <jiri@...nulli.us>
>> Signed-off-by: Thomas Haller <thaller@...hat.com>
>> ---
>> v1->v2:
>> - reordered struct inet6_ifaddr as suggested by David Laight
>> - changed flags type to u32 on couple of places as suggested by Thomas Haller
>> - changed output of if6_seq_show as suggested by Thomas Haller
>
>This looks fine, but I would suggest to extend this to all addressing
>types using ifm->ifa_flags.  It is not such a big deal, there are only
>3 or 4.

Okay - I will do that.

>
>DecNET, ipv4, ipv6, and lastly phonet (which just reports "permanent"
>flag on get/dump).
>
>That way tools like iproute2 can just generically provide and
>interpret IFA_FLAGS attribute unconditionally.

Well the check and ->ifa_flags fallback needs to be in iproute2 anyway
in order to maintain compatibility with older kernels.

Thanks for review!

Jiri

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