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

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Date:	Tue, 19 Nov 2013 16:16:53 -0500 (EST)
From:	David Miller <davem@...emloft.net>
To:	jiri@...nulli.us
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

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.

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.
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