linux-kernel - Re: [PATCH v3 0/7] User namespace mount updates

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Message-ID: <alpine.LRH.2.20.1511191845510.10804@namei.org>
Date:	Thu, 19 Nov 2015 18:47:00 +1100 (AEDT)
From:	James Morris <jmorris@...ei.org>
To:	Richard Weinberger <richard.weinberger@...il.com>
cc:	Al Viro <viro@...iv.linux.org.uk>,
	Seth Forshee <seth.forshee@...onical.com>,
	Austin S Hemmelgarn <ahferroin7@...il.com>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	linux-bcache@...r.kernel.org,
	device-mapper development <dm-devel@...hat.com>,
	"linux-raid@...r.kernel.org" <linux-raid@...r.kernel.org>,
	"linux-mtd@...ts.infradead.org" <linux-mtd@...ts.infradead.org>,
	linux-fsdevel <linux-fsdevel@...r.kernel.org>,
	LSM <linux-security-module@...r.kernel.org>,
	selinux@...ho.nsa.gov, Serge Hallyn <serge.hallyn@...onical.com>,
	Andy Lutomirski <luto@...capital.net>,
	LKML <linux-kernel@...r.kernel.org>,
	"Theodore Ts'o" <tytso@....edu>
Subject: Re: [PATCH v3 0/7] User namespace mount updates

On Wed, 18 Nov 2015, Richard Weinberger wrote:

> On Wed, Nov 18, 2015 at 4:13 PM, Al Viro <viro@...iv.linux.org.uk> wrote:
> > On Wed, Nov 18, 2015 at 09:05:12AM -0600, Seth Forshee wrote:
> >
> >> Yes, the host admin. I'm not talking about trusting the admin inside the
> >> container at all.
> >
> > Then why not have the same host admin just plain mount it when setting the
> > container up and be done with that?  From the host namespace, before spawning
> > the docker instance or whatever framework you are using.  IDGI...
> 
> Because hosting companies sell containers as "full virtual machines"
> and customers expect to be able mount stuff like disk images they upload.

I don't think this is a valid reason for merging functionality into the 
kernel.


-- 
James Morris
<jmorris@...ei.org>

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