From: Fan Du <fan.du@windriver.com>
To: David Miller <davem@davemloft.net>
Cc: steffen.klassert@secunet.com, stephen@networkplumber.org,
dev@lists.strongswan.org, netdev@vger.kernel.org
Subject: Re: [PATCH net-next 0/2] Pack struct xfrm_usersa_info and struct xfrm_userpolicy_info
Date: Thu, 9 Jan 2014 16:24:22 +0800 [thread overview]
Message-ID: <52CE5CB6.3030409@windriver.com> (raw)
In-Reply-To: <20140107.130749.215535043457683103.davem@davemloft.net>
On 2014年01月08日 02:07, David Miller wrote:
> From: Fan Du<fan.du@windriver.com>
> 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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prev parent reply other threads:[~2014-01-09 8:24 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
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 [this message]
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