linux-kernel - Re: [RFC 1/1] shiftfs: uid/gid shifting bind mount

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Date:   Tue, 7 Feb 2017 01:53:49 -0800
From:   Christoph Hellwig <hch@...radead.org>
To:     Djalal Harouni <tixxdz@...il.com>
Cc:     Christoph Hellwig <hch@...radead.org>,
        James Bottomley <James.Bottomley@...senpartnership.com>,
        Chris Mason <clm@...com>, Theodore Tso <tytso@....edu>,
        Josh Triplett <josh@...htriplett.org>,
        "Eric W. Biederman" <ebiederm@...ssion.com>,
        Andy Lutomirski <luto@...nel.org>,
        Seth Forshee <seth.forshee@...onical.com>,
        Linux FS Devel <linux-fsdevel@...r.kernel.org>,
        linux-kernel@...r.kernel.org,
        LSM List <linux-security-module@...r.kernel.org>,
        Dongsu Park <dongsu@...ocode.com>,
        David Herrmann <dh.herrmann@...glemail.com>,
        Miklos Szeredi <mszeredi@...hat.com>,
        Alban Crequy <alban.crequy@...il.com>,
        Al Viro <viro@...iv.linux.org.uk>,
        "Serge E. Hallyn" <serge@...lyn.com>, Phil Estes <estesp@...il.com>
Subject: Re: [RFC 1/1] shiftfs: uid/gid shifting bind mount

On Tue, Feb 07, 2017 at 10:39:48AM +0100, Djalal Harouni wrote:
> I proposed an RFC months ago which implements all of this at the VFS
> layer [1], I received some feedback especially from Dave Chinner,
> however I failed to fix my bugs and improve it not enough resources...

And none of the issues goes away by hiding them in a stackable fs,
in fact many of them are getting worse.