From mboxrd@z Thu Jan  1 00:00:00 1970
From: Richard Weinberger <richard-/L3Ra7n9ekc@public.gmane.org>
Subject: Re: [RFC] lsm: namespace hooks
Date: Thu, 27 Nov 2014 16:01:59 +0100
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To: Lukasz Pawelczyk <l.pawelczyk-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>
Cc: Vladimir Davydov <vdavydov-bzQdu9zFT3WakBO8gow8eQ@public.gmane.org>, Miklos Szeredi <mszeredi-AlSwsSmVLrQ@public.gmane.org>, Lukasz Pawelczyk <havner-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>, LKML <linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>, David Howells <dhowells-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>, Mark Rustad <mark.d.rustad-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>, Matthew Dempsky <mdempsky-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>, Daeseok Youn <daeseok.youn-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>, Ingo Molnar <mingo-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>, Jeff Kirsher <jeffrey.t.kirsher-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>, David Rientjes <rientjes-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>, Alex Thorlton <athorlton-sJ/iWh9BUns@public.gmane.org>, Juri Lelli <juri.lelli-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>, Kees Cook <keescook-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>, Nikolay Aleksandrov <nikolay-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>, Dario Faggioli <raistlin-k2GhghHVRtY@public.gmane.org>, Al Viro <viro-RmSDqhL/yNMiFSDQTTA3OLVCufUGDwFn@public.gmane.org>, James Morris <james.l.morris-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>, ABI/API <linux-api-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>, Linux Containers <containers-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org>, Oleg Nesterov <oleg-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>, Paul Moore <pmoore-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>, linux-security-module-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
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Am 27.11.2014 um 15:44 schrieb Lukasz Pawelczyk:
> On czw, 2014-11-27 at 15:38 +0100, Richard Weinberger wrote:
>> Am 27.11.2014 um 15:35 schrieb Lukasz Pawelczyk:
>>> On czw, 2014-11-27 at 15:18 +0100, Richard Weinberger wrote:
>>>> On Thu, Nov 27, 2014 at 3:01 PM, Lukasz Pawelczyk
>>>> <l.pawelczyk-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org> wrote:
>>>>> -/* 0x02000000 was previously the unused CLONE_STOPPED (Start in stopped state)
>>>>> -   and is now available for re-use. */
>>>>> +#define CLONE_NEWLSM           0x02000000      /* New LSM namespace */
>>>>
>>>> FYI, CLONE_NEWCGROUP also claims last flag [1].
>>>
>>> Yes, I'm perfectly aware of that. I've seen those patches.
>>> This is RFC for now and CGROUP NS is not merged yet. I'll rebase when
>>> time comes.
>>
>> Just wanted to indicate that we run out of constants. :)
> 
> True, the last one is 0x80000000. I did not notice that. Thanks for
> pointing out.

Isn't this CLONE_IO?

> Any suggestion on what can be done here? New syscal with flags2?

I'm not sure. But a new syscall would be a candidate.

Thanks,
//richard