netdev - Re: [PATCH net v4] ipv6: fix multipath route replace error recovery

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Date:	Wed, 09 Sep 2015 22:08:03 -0700
From:	roopa <roopa@...ulusnetworks.com>
To:	David Miller <davem@...emloft.net>
CC:	nicolas.dichtel@...nd.com, mkubecek@...e.cz,
	Mazziesaccount@...il.com, hannes@...essinduktion.org,
	kuznet@....inr.ac.ru, jmorris@...ei.org, yoshfuji@...ux-ipv6.org,
	netdev@...r.kernel.org
Subject: Re: [PATCH net v4] ipv6: fix multipath route replace error recovery

On 9/9/15, 2:10 PM, David Miller wrote:
> From: Roopa Prabhu <roopa@...ulusnetworks.com>
> Date: Tue,  8 Sep 2015 10:53:04 -0700
>
>> This patch reduces the possibility of this by doing the following:
>> a) Changes the existing multipath route add code to a two stage process:
>>    build rt6_infos + insert them
>> 	ip6_route_add rt6_info creation code is moved into
>> 	ip6_route_info_create.
>> b) This ensures that most errors are caught during building rt6_infos
>>    and we fail early
>> c) Separates multipath add and del code. Because add needs the special
>>    two stage mode in a) and delete essentially does not care.
>> d) In any event if the code fails during inserting a route again, a
>>    warning is printed (This should be unlikely)
> Looks good, follows the usual "prepare/commit" paradigm.
>
> Applied, thanks.
>
> For net-next, it might be nice to make ip6_route_info_create() return
> error pointers instead of returning the rt pointer by reference.
ok, sounds good. Will post a patch with the error pointer to next-next 
when it opens. thanks.
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