linux-kernel - Re: [PATCH 7/8] cgroup: mount cgroupns-root when inside non-init cgroupns

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Message-ID: <20151125191041.GB14240@htj.duckdns.org>
Date:	Wed, 25 Nov 2015 14:10:41 -0500
From:	Tejun Heo <tj@...nel.org>
To:	"Serge E. Hallyn" <serge.hallyn@...ntu.com>
Cc:	serge@...lyn.com, linux-kernel@...r.kernel.org,
	adityakali@...gle.com, linux-api@...r.kernel.org,
	containers@...ts.linux-foundation.org, cgroups@...r.kernel.org,
	lxc-devel@...ts.linuxcontainers.org, akpm@...ux-foundation.org,
	ebiederm@...ssion.com
Subject: Re: [PATCH 7/8] cgroup: mount cgroupns-root when inside non-init
 cgroupns

Hello, Serge.

On Wed, Nov 25, 2015 at 12:01:56AM -0600, Serge E. Hallyn wrote:
> that was my goal with https://git.kernel.org/cgit/linux/kernel/git/sergeh/linux-security.git/commit/?h=cgroupns.v4&id=8eb75d2bb24df59e262f050dce567d2332adc5f3
> (which was sent inline earlier in this thread in response to Eric)  Does
> that look sufficient?

Hmmm... but that wouldn't work with non-root and user ns.  I think
what's necessary is ensuring that namespace scoped mount never creates
a new hierarchy but always reuses an existing one.

Thanks.

-- 
tejun
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