linux-kernel - Re: [PATCH 0/7] overlay filesystem v9

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Message-ID: <20110520081226.0787e2dd@notabene.brown>
Date:	Fri, 20 May 2011 08:12:26 +1000
From:	NeilBrown <neilb@...e.de>
To:	Andy Whitcroft <apw@...onical.com>
Cc:	Miklos Szeredi <miklos@...redi.hu>, viro@...IV.linux.org.uk,
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	akpm@...ux-foundation.org, nbd@...nwrt.org, hramrach@...trum.cz,
	jordipujolp@...il.com
Subject: Re: [PATCH 0/7] overlay filesystem v9

On Thu, 19 May 2011 19:05:58 +0100 Andy Whitcroft <apw@...onical.com> wrote:

> On Thu, May 19, 2011 at 07:44:54PM +0200, Miklos Szeredi wrote:
> 
> > Forgot to attach the patch?
> 
> Yep, should be in your inbox now.
> 
> > >
> > > With this in place I have been able to boot a Natty release live CD
> > > image, and upgrade it in place to the latest and greatest of everything.
> > > Very nice.  Thanks for your work continuing work on overlayfs.  It is
> > > starting to look good enough to merge.
> > >
> > > Comments?
> > 
> > I'd be happier if the LSM module were fixed not to peek inside the inode
> > structure.  Some filesystems (notably network ones) do not guarantee i_*
> > to be up-to-date, relying on these is not a good idea.
> 
> I wonder what what the official way to get ownership information for an
> inode is if we cannot rely on those.  I am happy to get the Yama LSM
> fixed up if they are doing something wrong.
> 
> -apw

inode->getattr(...., &kstat);
look at kstat.uid, kstat.gid.

??

NeilBrown
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