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From: Christoph Hellwig <hch@infradead.org>
To: James Bottomley <James.Bottomley@HansenPartnership.com>
Cc: Christoph Hellwig <hch@infradead.org>,
	Amir Goldstein <amir73il@gmail.com>,
	Djalal Harouni <tixxdz@gmail.com>, Chris Mason <clm@fb.com>,
	Theodore Tso <tytso@mit.edu>,
	Josh Triplett <josh@joshtriplett.org>,
	"Eric W. Biederman" <ebiederm@xmission.com>,
	Andy Lutomirski <luto@kernel.org>,
	Seth Forshee <seth.forshee@canonical.com>,
	linux-fsdevel <linux-fsdevel@vger.kernel.org>,
	linux-kernel <linux-kernel@vger.kernel.org>,
	LSM List <linux-security-module@vger.kernel.org>,
	Dongsu Park <dongsu@endocode.com>,
	David Herrmann <dh.herrmann@googlemail.com>,
	Miklos Szeredi <mszeredi@redhat.com>,
	Alban Crequy <alban.crequy@gmail.com>,
	Al Viro <viro@zeniv.linux.org.uk>,
	"Serge E. Hallyn" <serge@hallyn.com>,
	Phil Estes <estesp@gmail.com>
Subject: Re: [RFC 1/1] shiftfs: uid/gid shifting bind mount
Date: Tue, 7 Feb 2017 11:49:33 -0800	[thread overview]
Message-ID: <20170207194933.GB4393@infradead.org> (raw)
In-Reply-To: <1486494123.2488.56.camel@HansenPartnership.com>

On Tue, Feb 07, 2017 at 11:02:03AM -0800, James Bottomley wrote:
> >   Another option would be to require something like a project as used 
> > for project quotas as the root.  This would also be conveniant as it 
> > could storge the used remapping tables.
> 
> So this would be like the current project quota except set on a
> subtree?  I could see it being done that way but I don't see what
> advantage it has over using flags in the subtree itself (the mapping is
> known based on the mount namespace, so there's really only a single bit
> of information to store).

projects (which are the underling concept for project quotas) are
per-subtree in practice - the flag is set on an inode and then
all directories and files underneath inherit the project ID,
hardlinking outside a project is prohinited.

  reply	other threads:[~2017-02-07 19:50 UTC|newest]

Thread overview: 82+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-02-04 19:18 [RFC 0/1] shiftfs: uid/gid shifting filesystem (s_user_ns version) James Bottomley
2017-02-04 19:19 ` [RFC 1/1] shiftfs: uid/gid shifting bind mount James Bottomley
2017-02-05  7:51   ` Amir Goldstein
2017-02-06  1:18     ` James Bottomley
2017-02-06  6:59       ` Amir Goldstein
2017-02-06 14:41         ` James Bottomley
2017-02-14 23:03       ` Vivek Goyal
2017-02-14 23:45         ` James Bottomley
2017-02-15 14:17           ` Vivek Goyal
2017-02-16 15:51             ` James Bottomley
2017-02-16 16:42               ` Vivek Goyal
2017-02-16 16:58                 ` James Bottomley
2017-02-17  1:57                   ` Eric W. Biederman
2017-02-17  8:39                     ` Djalal Harouni
2017-02-17 17:19                     ` James Bottomley
2017-02-20  4:24                       ` Eric W. Biederman
2017-02-22 12:01                         ` James Bottomley
2017-02-06  3:25   ` J. R. Okajima
2017-02-06  6:38     ` Amir Goldstein
2017-02-06 16:29       ` James Bottomley
2017-02-06  6:46     ` James Bottomley
2017-02-06 14:50       ` Theodore Ts'o
2017-02-06 15:18         ` James Bottomley
2017-02-06 15:38           ` lkml
2017-02-06 17:32             ` James Bottomley
2017-02-06 21:52           ` J. Bruce Fields
2017-02-07  0:10             ` James Bottomley
2017-02-07  1:35               ` J. Bruce Fields
2017-02-07 19:01                 ` James Bottomley
2017-02-07 19:47                   ` Christoph Hellwig
2017-02-06 16:24       ` J. R. Okajima
2017-02-21  0:48         ` James Bottomley
2017-02-21  2:57           ` J. R. Okajima
2017-02-21  4:07             ` James Bottomley
2017-02-21  4:34               ` J. R. Okajima
2017-02-07  9:19   ` Christoph Hellwig
2017-02-07  9:39     ` Djalal Harouni
2017-02-07  9:53       ` Christoph Hellwig
2017-02-07 16:37     ` James Bottomley
2017-02-07 17:59       ` Amir Goldstein
2017-02-07 18:10         ` Christoph Hellwig
2017-02-07 19:02           ` James Bottomley
2017-02-07 19:49             ` Christoph Hellwig [this message]
2017-02-07 20:05               ` James Bottomley
2017-02-07 21:01                 ` Amir Goldstein
2017-02-07 22:25                   ` Christoph Hellwig
2017-02-07 23:42                     ` James Bottomley
2017-02-08  6:44                       ` Amir Goldstein
2017-02-08 11:45                         ` Konstantin Khlebnikov
2017-02-08 14:57                         ` James Bottomley
2017-02-08 15:15                         ` James Bottomley
2017-02-08  1:54               ` Josh Triplett
2017-02-08 15:22                 ` James Bottomley
2017-02-09 10:36                   ` Josh Triplett
2017-02-09 15:34                     ` James Bottomley
2017-02-13 10:15                       ` Eric W. Biederman
2017-02-15  9:33                         ` Djalal Harouni
2017-02-15  9:37                           ` Eric W. Biederman
2017-02-15 10:04                             ` Djalal Harouni
2017-02-07 18:20         ` James Bottomley
2017-02-07 19:48           ` Djalal Harouni
2017-02-15 20:34   ` Vivek Goyal
2017-02-16 15:56     ` James Bottomley
2017-02-17  2:55       ` Al Viro
2017-02-17 17:34         ` James Bottomley
2017-02-17 20:35           ` Vivek Goyal
2017-02-19  3:24             ` James Bottomley
2017-02-20 19:26               ` Vivek Goyal
2017-02-21  0:38                 ` James Bottomley
2017-02-17  2:29   ` Al Viro
2017-02-17 17:24     ` James Bottomley
2017-02-17 17:51       ` Al Viro
2017-02-17 20:27         ` Vivek Goyal
2017-02-17 20:50         ` James Bottomley
  -- strict thread matches above, loose matches on Subject: below --
2016-05-12 19:06 [RFC 0/1] shiftfs: uid/gid shifting filesystem James Bottomley
2016-05-12 19:07 ` [RFC 1/1] shiftfs: uid/gid shifting bind mount James Bottomley
2016-05-16 19:41   ` Serge Hallyn
2016-05-17  2:28     ` James Bottomley
2016-05-17  3:47       ` Serge E. Hallyn
2016-05-17 10:23         ` James Bottomley
2016-05-17 20:59           ` James Bottomley
2016-05-19  2:28             ` Serge E. Hallyn
2016-05-19 10:53               ` James Bottomley

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