linux-kernel - Re: [RFC] dealing with proc_ns_follow

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Message-ID: <20141124105536.GG7996@ZenIV.linux.org.uk>
Date:	Mon, 24 Nov 2014 10:55:36 +0000
From:	Al Viro <viro@...IV.linux.org.uk>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [RFC] dealing with proc_ns_follow_link() and "namespace" dentries

On Sat, Nov 01, 2014 at 06:30:37PM +0000, Al Viro wrote:
> On Sat, Nov 01, 2014 at 03:06:20PM +0000, Al Viro wrote:
> > On Sat, Nov 01, 2014 at 08:38:04AM +0000, Al Viro wrote:
> > > OK, interim branch (_completely_ untested, and there's quite a bit of
> > > work remaining) is in vfs.git#nsfs.
> > 
> > ... except that what got pushed was completely buggered - the last changes
> > not committed *and* include/linux/ns_common.h not git-add'ed at the very
> > beginning.  Oh, well - it wasn't hard to reconstruct its history...
> > 
> > Anyway, that much got fixed and pushed; sorry about the noise - shouldn't
> > have posted before grabbing some sleep...
> 
> And now it even seems to work.  Poking in /proc/*/ns/*, mount --bind of those
> suckers to regular files, unshare and nsenter (both by PID and by file,
> including the ones we'd bound somewhere).  Eric, could you hit it with
> whatever testsuite you are using and see if it survives?
> 
> It's vfs.git#nsfs (head should be at 2e64120), branched at -rc2.  The meat
> of that sucker is in the next-to-last commit; the rest is preparation and
> a minor cleanup.

ping?
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