netdev - Re: [PATCH net-next v2 0/4] libnl: enhance API to ease 64bit alignment for attribute

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Date:	Fri, 22 Apr 2016 00:00:09 +0200
From:	Nicolas Dichtel <nicolas.dichtel@...nd.com>
To:	David Miller <davem@...emloft.net>
Cc:	netdev@...r.kernel.org, roopa@...ulusnetworks.com,
	eric.dumazet@...il.com, tgraf@...g.ch, jhs@...atatu.com
Subject: Re: [PATCH net-next v2 0/4] libnl: enhance API to ease 64bit
 alignment for attribute

Le 21/04/2016 20:28, David Miller a écrit :
> From: Nicolas Dichtel <nicolas.dichtel@...nd.com>
> Date: Thu, 21 Apr 2016 18:58:23 +0200
>
>> Here is a proposal to add more helpers in the libnetlink to manage 64-bit
>> alignment issues.
>> Note that this series was only tested on x86 by tweeking
>> CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS and adding some traces.
>>
>> The first patch adds helpers for 64bit alignment and other patches
>> use them.
>>
>> We could also add helpers for nla_put_u64() and its variants if needed.
>>
>> v1 -> v2:
>>   - remove patch #1
>>   - split patch #2 (now #1 and #2)
>>   - add nla_need_padding_for_64bit()
>
> I like it, nice work Nicolas.
Thank you.

>
> Applied to net-next.
>
> I did a quick scan and the following jumped out at me as cases we need
> to fix up as well:
Did you grep something or just catch this by code review?

>
> 1) xfrm_user
> 2) tcp_info
> 3) taskstats
> 4) pkt_{cls,sched}
> 5) openvswitch
> etc.
>
> Most of these are statistic cases just like all of the existing ones
> we have fixed so far.
Yes, I will follow on this topic. There are also a bunch of
nla_put_[u|be|le]64():
$ git grep -w "nla_put_.\{1,2\}64" net/ | wc -l
118
$ git grep -w "nla_put_.\{1,2\}64" | wc -l
172