Message-id: <1417098928.1805.15.camel@samsung.com>
Subject: Re: [RFC] lsm: namespace hooks
From: Lukasz Pawelczyk <l.pawelczyk@samsung.com>
To: Richard Weinberger <richard.weinberger@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>, Peter Zijlstra <peterz@infradead.org>,
        James Morris <james.l.morris@oracle.com>,
        "Serge E. Hallyn" <serge@hallyn.com>,
        Serge Hallyn <serge.hallyn@canonical.com>,
        Al Viro <viro@zeniv.linux.org.uk>, Paul Moore <pmoore@redhat.com>,
        Kees Cook <keescook@chromium.org>, Miklos Szeredi <mszeredi@suse.cz>,
        Jeff Kirsher <jeffrey.t.kirsher@intel.com>,
        Nikolay Aleksandrov <nikolay@redhat.com>,
        Mark Rustad <mark.d.rustad@intel.com>,
        David Howells <dhowells@redhat.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        Oleg Nesterov <oleg@redhat.com>, Juri Lelli <juri.lelli@gmail.com>,
        Daeseok Youn <daeseok.youn@gmail.com>,
        David Rientjes <rientjes@google.com>,
        Dario Faggioli <raistlin@linux.it>, Alex Thorlton <athorlton@sgi.com>,
        Matthew Dempsky <mdempsky@chromium.org>,
        Davidlohr Bueso <davidlohr@hp.com>,
        Vladimir Davydov <vdavydov@parallels.com>,
        "Eric W. Biederman" <ebiederm@xmission.com>,
        Casey Schaufler <casey@schaufler-ca.com>,
        LKML <linux-kernel@vger.kernel.org>,
        "open list:ABI/API" <linux-api@vger.kernel.org>,
        linux-security-module@vger.kernel.org,
        Linux Containers <containers@lists.linux-foundation.org>,
        Lukasz Pawelczyk <havner@gmail.com>
Date: Thu, 27 Nov 2014 15:35:28 +0100
In-reply-to: <CAFLxGvzw4N4QFv5Vg1dDf9pdRe+Szbevmqn5QNwjLHN4xrokCg@mail.gmail.com>
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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@samsung.com> 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.

> As it looks we will get more and more namespaces, more than clone() can handle.
> 
> [1] https://lkml.org/lkml/2014/7/17/588
> 

-- 
Lukasz Pawelczyk
Samsung R&D Institute Poland
Samsung Electronics


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