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

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Message-ID: <564D7FF6.50408@nod.at>
Date:	Thu, 19 Nov 2015 08:53:26 +0100
From:	Richard Weinberger <richard@....at>
To:	James Morris <jmorris@...ei.org>
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

Am 19.11.2015 um 08:47 schrieb James Morris:
> 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.

Erm, I don't want this in the kernel. That's why I've proposed the lklfuse approach.

Thanks,
//richard
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