netdev - Re: [strongSwan-dev] [PATCH net-next 0/2] Pack struct xfrm_usersa_info and struct xfrm_userpolicy

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Date:	Tue, 7 Jan 2014 14:55:21 +0800
From:	Fan Du <fan.du@...driver.com>
To:	<steffen.klassert@...unet.com>
CC:	<stephen@...workplumber.org>, <netdev@...r.kernel.org>,
	<davem@...emloft.net>, <dev@...ts.strongswan.org>
Subject: Re: [strongSwan-dev] [PATCH net-next 0/2] Pack struct xfrm_usersa_info
 and struct xfrm_userpolicy_info

Oh, I don't know why '[strongSwan-dev]' is tagged in front of subject for only part of whole patch set.
In fact, I didn't mean to add '[strongSwan-dev]' into subject line. Sorry for the inconvenience.

On 2014年01月07日 14:48, Fan Du wrote:
> When trying to setup IPsec configuration on a 64bits host with
> iproute2(32bits compiled), the intened xfrm policy and sa is
> either deficit or wrong when kernel trying to parse user land
> information.
>
> Further investigatino shows that:
> L: kernel
> R: iproute2
>
>            sizeof       userpolicy      usersa
> 64bits(unpacked)        168/168        224/224
> 32bits(unpacked)        164/164        220/220
>                           ^   ^
>                           L   R
>
> To keep kernel and user land see a consistent structure, after
> add packing attribute, now it looks like this:
>
> 64bits(  packed)        164/164        217/217
> 32bits(  packed)        164/164        217/217
>                           ^   ^
>                           L   R
>
> Then different kernel/iproute2 build configuration will not impact IPsec setup.
>
> Fan Du (2):
>    include/uapi/linux/xfrm.h: Pack struct xfrm_userpolicy_info
>    include/uapi/linux/xfrm.h: Pack struct xfrm_usersa_info
>
>   include/uapi/linux/xfrm.h |    4 ++--
>   1 file changed, 2 insertions(+), 2 deletions(-)
>

-- 
浮沉随浪只记今朝笑

--fan
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