From: Pavel Machek <pavel@ucw.cz>
To: Theodore Tso <tytso@mit.edu>, Jan Blunck <jblunck@suse.de>,
linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
Bharata B Rao <bharata@linux.vnet.ibm.com>
Subject: Re: [RFC 12/26] ext2 white-out support
Date: Thu, 2 Aug 2007 21:31:59 +0200 [thread overview]
Message-ID: <20070802193159.GA23149@elf.ucw.cz> (raw)
In-Reply-To: <20070731105309.GA6980@thunk.org>
Hi!
> > > I wouldn't bother with setting the directory type field to be DT_WHT,
> > > given that they will never be returned to userspace anyway.
> >
> > At the moment I still rely on this for the current readdir implementation.
> > Viro already said that he doesn't want to see this (the readdir changes) in
> > the kernel but in userspace.
>
> Life gets very messy if you have to do this in userspace. Example:
> statically linked programs that were compiled with a version of glibc
> that didn't know about whiteout records. Unfortunately, the memory
WEll, also if root deletes something, it should be _gone_, and user
should not be able to work around that just by bringing statically
linked ls..
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
next prev parent reply other threads:[~2007-08-02 19:32 UTC|newest]
Thread overview: 64+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-07-30 16:13 [RFC 00/26] VFS based Union Mount (V2) Jan Blunck
2007-07-30 16:13 ` [RFC 01/26] [PATCH 14/18] shmem: convert to using splice instead of sendfile() Jan Blunck
2007-07-30 16:13 ` [RFC 02/26] VFS: Export dput_path() and path_to_nameidata() Jan Blunck
2007-07-30 16:13 ` [RFC 03/26] VFS: Make lookup_hash() return a struct path Jan Blunck
2007-07-30 16:13 ` [RFC 04/26] VFS: Make lookup_create() " Jan Blunck
2007-07-30 16:13 ` [RFC 05/26] VFS: cache_lookup() cleanup Jan Blunck
2007-07-30 16:13 ` [RFC 06/26] VFS: Make real_lookup() return a struct path Jan Blunck
2007-07-30 16:13 ` [RFC 07/26] VFS: Introduce dput() variante that maintains a kill-list Jan Blunck
2007-07-30 16:13 ` [RFC 08/26] VFS: Export lives_below_in_same_fs() Jan Blunck
2007-07-30 16:13 ` [RFC 09/26] linux/stat.h: Add the filetype white-out Jan Blunck
2007-07-30 16:13 ` [RFC 10/26] VFS white-out handling Jan Blunck
2007-07-30 16:13 ` [RFC 11/26] tmpfs white-out support Jan Blunck
2007-08-01 15:13 ` Hugh Dickins
2007-08-02 2:48 ` Matt Mackall
2007-07-30 16:13 ` [RFC 12/26] ext2 " Jan Blunck
2007-07-31 3:45 ` Theodore Tso
2007-07-31 7:44 ` Jan Blunck
2007-07-31 8:32 ` Andreas Dilger
2007-07-31 9:08 ` Jan Blunck
2007-07-31 10:53 ` Theodore Tso
2007-08-02 19:31 ` Pavel Machek [this message]
2007-07-31 16:36 ` Josef Sipek
2007-07-31 17:00 ` Jan Blunck
2007-07-31 17:11 ` Josef Sipek
2007-08-01 15:23 ` Dave Kleikamp
2007-08-01 18:44 ` Josef Sipek
2007-08-01 19:10 ` Dave Kleikamp
2007-08-01 19:33 ` Josef Sipek
2007-08-01 19:52 ` Dave Kleikamp
2007-08-01 22:06 ` Erez Zadok
2007-08-02 12:05 ` Jan Blunck
2007-08-02 11:55 ` Jan Blunck
2007-08-02 17:50 ` Jörn Engel
2007-08-02 5:24 ` Ph. Marek
2007-08-02 12:12 ` Jan Blunck
2007-08-02 10:26 ` Jan Blunck
2007-08-01 10:00 ` Hans-Peter Jansen
2007-08-01 11:43 ` Josef Sipek
2007-08-01 18:01 ` Jan Engelhardt
2007-07-31 17:03 ` Mark Williamson
2007-07-31 17:16 ` Josef Sipek
2007-08-01 17:58 ` Jan Engelhardt
2007-08-01 18:03 ` Josef Sipek
2007-07-30 16:13 ` [RFC 13/26] ext3 whiteout support Jan Blunck
2007-07-30 16:13 ` [RFC 14/26] union-mount: Documentation Jan Blunck
2007-07-30 16:13 ` [RFC 15/26] union-mount: Add union-mount mount flag Jan Blunck
2007-07-30 16:13 ` [RFC 16/26] union-mount: Introduce union_mount structure Jan Blunck
2007-08-06 5:57 ` Bharata B Rao
2007-07-30 16:13 ` [RFC 17/26] union-mount: Drive the union cache via dcache Jan Blunck
2007-07-30 16:13 ` [RFC 18/26] union-mount: Changes to the namespace handling Jan Blunck
2007-08-08 10:10 ` Bharata B Rao
2007-07-30 16:13 ` [RFC 19/26] union-mount: Make lookup work for union-mounted file systems Jan Blunck
2007-08-09 5:42 ` Bharata B Rao
2007-07-30 16:13 ` [RFC 20/26] union-mount: Simple union-mount readdir implementation Jan Blunck
2007-08-06 11:08 ` Bharata B Rao
2007-07-30 16:13 ` [RFC 21/26] union-mount: in-kernel file copy between union mounted filesystems Jan Blunck
2007-07-30 16:13 ` [RFC 22/26] union-mount: white-out changes for copy-on-open Jan Blunck
2007-07-30 16:13 ` [RFC 23/26] union-mount: copyup on rename Jan Blunck
2007-07-30 16:13 ` [RFC 24/26] union-mount: dont report EROFS for union mounts Jan Blunck
2007-07-30 16:13 ` [RFC 25/26] union-mount: Debug Infrastructure Jan Blunck
2007-07-30 16:13 ` [RFC 26/26] union-mount: Debug code Jan Blunck
2007-07-30 18:23 ` [RFC 00/26] VFS based Union Mount (V2) Al Boldi
2007-08-02 6:49 ` Bharata B Rao
2007-08-02 10:17 ` Jan Blunck
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