From: Frank van Maarseveen <frankvm@frankvm.com>
To: Miklos Szeredi <miklos@szeredi.hu>
Cc: frankvm@frankvm.com, akpm@osdl.org, aia21@cam.ac.uk,
arjan@infradead.org, linux-kernel@vger.kernel.org
Subject: Re: FUSE merging?
Date: Fri, 1 Jul 2005 17:20:03 +0200 [thread overview]
Message-ID: <20050701152003.GA7073@janus> (raw)
In-Reply-To: <E1DoLSx-0002sR-00@dorka.pomaz.szeredi.hu>
On Fri, Jul 01, 2005 at 03:21:59PM +0200, Miklos Szeredi wrote:
>
> > To require an empty stub to mount FUSE upon makes the whole picture
> > cleaner: users are only able to extend the namespace _leaf_ nodes for
> > themselves and processes they can send signals to: setuid programs
> > which do not fully become root. The existing namespace [nodes] remains
> > unchanged for everyone.
>
> It's not as simple. A filesystem can be mounted many times (either
> with mount --bind, or just by mounting the same device on multiple
> mountpoints). In this case you can't ensure, that a mountpoint will
> remain a leaf node after being mounted on.
I have bind-mounted / on /net/blabla
I tried two experiments:
mounting something under / and looking for it under /net/blabla
mounting something under /net/blabla and looking for it under /
The experiment was done with bind mounts and by mounting a USB stick
(/dev/sdb1) and there was no auto propagation of mounts.
(2.6.12-rc6)
How can a leaf dir suddenly become non-leaf by a mount without an explicit
mount command?
--
Frank
next prev parent reply other threads:[~2005-07-01 15:21 UTC|newest]
Thread overview: 85+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-06-30 9:19 FUSE merging? Miklos Szeredi
2005-06-30 9:27 ` Andrew Morton
2005-06-30 9:51 ` Miklos Szeredi
2005-06-30 10:00 ` Arjan van de Ven
2005-06-30 10:12 ` Miklos Szeredi
2005-06-30 10:20 ` Arjan van de Ven
2005-06-30 10:24 ` Miklos Szeredi
2005-06-30 19:39 ` Avuton Olrich
2005-07-01 6:23 ` Miklos Szeredi
2005-06-30 11:13 ` Anton Altaparmakov
2005-06-30 19:46 ` Andrew Morton
2005-06-30 20:00 ` Andrew Morton
2005-07-01 6:40 ` Miklos Szeredi
2005-06-30 22:28 ` Frank van Maarseveen
2005-07-01 6:58 ` Miklos Szeredi
2005-07-01 9:24 ` Frank van Maarseveen
2005-07-01 10:27 ` Miklos Szeredi
2005-07-01 12:00 ` Frank van Maarseveen
2005-07-01 12:36 ` Miklos Szeredi
2005-07-01 13:05 ` Frank van Maarseveen
2005-07-01 13:21 ` Miklos Szeredi
2005-07-01 15:20 ` Frank van Maarseveen [this message]
2005-07-01 17:04 ` Miklos Szeredi
2005-07-01 18:04 ` Frank van Maarseveen
2005-07-01 19:35 ` Jeremy Maitin-Shepard
2005-07-02 14:49 ` Miklos Szeredi
2005-07-02 16:00 ` Frank van Maarseveen
2005-07-03 6:16 ` Miklos Szeredi
2005-07-03 11:25 ` Frank van Maarseveen
2005-07-03 13:24 ` Miklos Szeredi
2005-07-03 13:50 ` Frank van Maarseveen
2005-07-03 14:03 ` Miklos Szeredi
2005-07-03 14:10 ` FUSE merging? (2) Frank van Maarseveen
2005-07-03 15:47 ` Miklos Szeredi
2005-07-03 19:36 ` Frank van Maarseveen
2005-07-04 8:56 ` Miklos Szeredi
2005-07-04 9:59 ` Frank van Maarseveen
2005-07-04 10:27 ` Miklos Szeredi
2005-07-04 11:26 ` Frank van Maarseveen
2005-07-01 6:36 ` FUSE merging? Miklos Szeredi
2005-07-01 6:50 ` Andrew Morton
2005-07-01 7:07 ` Miklos Szeredi
2005-07-01 7:14 ` Andrew Morton
2005-07-01 7:27 ` Miles Bader
2005-07-01 7:38 ` Miklos Szeredi
2005-07-01 8:02 ` Andrew Morton
2005-07-01 10:11 ` Miklos Szeredi
2005-07-01 11:29 ` Andrew Morton
2005-07-01 12:00 ` Miklos Szeredi
2005-07-01 12:53 ` Anton Altaparmakov
2005-07-01 13:07 ` Anton Altaparmakov
2005-07-01 13:51 ` Frank van Maarseveen
2005-07-01 13:29 ` Eric Van Hensbergen
2005-07-01 16:45 ` Matthias Urlichs
2005-07-01 12:08 ` Frank van Maarseveen
2005-07-01 13:21 ` Eric Van Hensbergen
2005-07-01 13:53 ` Miklos Szeredi
2005-07-01 14:18 ` Eric Van Hensbergen
2005-07-01 14:31 ` Miklos Szeredi
2005-07-02 10:01 ` Eric W. Biederman
2005-07-02 14:58 ` Miklos Szeredi
2005-07-02 16:43 ` Eric Van Hensbergen
2005-07-02 17:33 ` Eric W. Biederman
2005-07-03 19:39 ` Pavel Machek
2005-07-04 8:38 ` Miklos Szeredi
[not found] ` <20050704084900.GG15370@elf.ucw.cz>
2005-07-04 9:02 ` Miklos Szeredi
2005-07-04 10:46 ` Pekka Enberg
2005-07-01 12:37 ` bert hubert
2005-07-01 7:46 ` Frederik Deweerdt
2005-07-01 9:47 ` Miklos Szeredi
2005-07-01 9:36 ` Frank van Maarseveen
2005-07-01 10:45 ` Miklos Szeredi
2005-07-01 11:34 ` Frank van Maarseveen
2005-06-30 10:16 ` Miklos Szeredi
2005-06-30 16:30 ` Pavel Machek
-- strict thread matches above, loose matches on Subject: below --
2005-09-02 22:02 Miklos Szeredi
2005-09-02 22:34 ` Andrew Morton
2005-09-03 0:34 ` Kasper Sandberg
2005-09-03 5:31 ` Miklos Szeredi
2005-09-03 6:40 ` Andrew Morton
2005-09-03 7:23 ` Miklos Szeredi
2005-09-03 13:29 ` Eric Van Hensbergen
2005-09-03 14:20 ` Miklos Szeredi
2005-09-03 15:01 ` Eric Van Hensbergen
2005-09-03 15:38 ` Miklos Szeredi
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