linux-kernel - Re: [RFC PATCH 0/5] Second attempt at contained helper execution

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Message-ID: <20150114221011.GC7071@fieldses.org>
Date:	Wed, 14 Jan 2015 17:10:11 -0500
From:	"J. Bruce Fields" <bfields@...ldses.org>
To:	Ian Kent <ikent@...hat.com>
Cc:	Kernel Mailing List <linux-kernel@...r.kernel.org>,
	David Howells <dhowells@...hat.com>,
	Oleg Nesterov <onestero@...hat.com>,
	Trond Myklebust <trond.myklebust@...marydata.com>,
	Benjamin Coddington <bcodding@...hat.com>,
	Al Viro <viro@...IV.linux.org.uk>,
	Jeff Layton <jeff.layton@...marydata.com>,
	"Eric W. Biederman" <ebiederm@...ssion.com>
Subject: Re: [RFC PATCH 0/5] Second attempt at contained helper execution

> On Wed, Jan 14, 2015 at 05:32:22PM +0800, Ian Kent wrote:
> > There are other difficulties to tackle as well, such as how to decide
> > if contained helper execution is needed. For example, if a mount has
> > been propagated to a container or bound into the container tree (such
> > as with the --volume option of "docker run") the root init namespace
> > may need to be used and not the container namespace.

I think you have to go through each of the existing upcall examples and
decide what's needed for each.

At least for the nfsv4 idmapper I would've thought the namespace the
mount was done in would be the right choice, hence my previous question.

--b.
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