On 2014年01月08日 02:07, David Miller wrote:
> From: Fan Du<[email protected]>
> Date: Tue, 7 Jan 2014 14:48:57 +0800
>
>> > 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.
> You can't make this change without breaking userspace.
>
> We'll have to translate the data structures somehow with a compat
> layer like we have for 32/64 bit compatability for system calls.
Do you mean below code snippet?
compat_sys_sendmsg
-> __sys_sendmsg
-> ___sys_sendmsg
-> get_compat_msghdr <- translate the structure here
It's a bit of late in the code flow to do the translation in
xfrm_user code, or I missed what you actually mean.
--
浮沉随浪只记今朝笑
--fan
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