linux-kernel - Re: [RFC] lsm: namespace hooks

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Message-id: <1417098928.1805.15.camel@samsung.com>
Date:	Thu, 27 Nov 2014 15:35:28 +0100
From:	Lukasz Pawelczyk <l.pawelczyk@...sung.com>
To:	Richard Weinberger <richard.weinberger@...il.com>
Cc:	Ingo Molnar <mingo@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>,
	James Morris <james.l.morris@...cle.com>,
	"Serge E. Hallyn" <serge@...lyn.com>,
	Serge Hallyn <serge.hallyn@...onical.com>,
	Al Viro <viro@...iv.linux.org.uk>,
	Paul Moore <pmoore@...hat.com>,
	Kees Cook <keescook@...omium.org>,
	Miklos Szeredi <mszeredi@...e.cz>,
	Jeff Kirsher <jeffrey.t.kirsher@...el.com>,
	Nikolay Aleksandrov <nikolay@...hat.com>,
	Mark Rustad <mark.d.rustad@...el.com>,
	David Howells <dhowells@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Oleg Nesterov <oleg@...hat.com>,
	Juri Lelli <juri.lelli@...il.com>,
	Daeseok Youn <daeseok.youn@...il.com>,
	David Rientjes <rientjes@...gle.com>,
	Dario Faggioli <raistlin@...ux.it>,
	Alex Thorlton <athorlton@....com>,
	Matthew Dempsky <mdempsky@...omium.org>,
	Davidlohr Bueso <davidlohr@...com>,
	Vladimir Davydov <vdavydov@...allels.com>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Casey Schaufler <casey@...aufler-ca.com>,
	LKML <linux-kernel@...r.kernel.org>,
	"open list:ABI/API" <linux-api@...r.kernel.org>,
	linux-security-module@...r.kernel.org,
	Linux Containers <containers@...ts.linux-foundation.org>,
	Lukasz Pawelczyk <havner@...il.com>
Subject: Re: [RFC] lsm: namespace hooks

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@...sung.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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