From: Fan Du <fan.du@windriver.com>
To: Steffen Klassert <steffen.klassert@secunet.com>
Cc: stephen@networkplumber.org, netdev@vger.kernel.org,
davem@davemloft.net, dev@lists.strongswan.org
Subject: Re: [PATCH net-next 0/2] Pack struct xfrm_usersa_info and struct xfrm_userpolicy_info
Date: Tue, 7 Jan 2014 15:59:56 +0800 [thread overview]
Message-ID: <52CBB3FC.9050207@windriver.com> (raw)
In-Reply-To: <20140107074724.GV31491@secunet.com>
On 2014年01月07日 15:47, Steffen Klassert wrote:
> On Tue, Jan 07, 2014 at 02:48:57PM +0800, 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
>>
>
> We don't change userspace exported structures. This breaks
> existing userspace tools.
>
Then user with 32bits iproute2 or StrongSwan has to rebuild as 64bits?
--
浮沉随浪只记今朝笑
--fan
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next prev parent reply other threads:[~2014-01-07 7:59 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-01-07 6:48 [PATCH net-next 0/2] Pack struct xfrm_usersa_info and struct xfrm_userpolicy_info Fan Du
2014-01-07 6:48 ` [PATCH net-next 1/2] include/uapi/linux/xfrm.h: Pack " Fan Du
2014-01-07 22:52 ` Sergei Shtylyov
2014-01-09 8:39 ` Fan Du
2014-01-09 22:58 ` Sergei Shtylyov
2014-01-09 23:07 ` Sergei Shtylyov
2014-01-07 6:48 ` [PATCH net-next 2/2] include/uapi/linux/xfrm.h: Pack struct xfrm_usersa_info Fan Du
2014-01-08 20:33 ` Ben Hutchings
2014-01-09 8:24 ` Fan Du
2014-01-09 18:58 ` Ben Hutchings
2014-01-07 6:55 ` [PATCH net-next 0/2] Pack struct xfrm_usersa_info and struct xfrm_userpolicy_info Fan Du
2014-01-07 7:47 ` Steffen Klassert
2014-01-07 7:59 ` Fan Du [this message]
2014-01-07 10:00 ` David Laight
2014-01-09 8:34 ` Fan Du
2014-01-09 9:07 ` David Laight
2014-01-07 18:07 ` David Miller
2014-01-09 8:24 ` Fan Du
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