From: Shaya Potter <spotter@cs.columbia.edu>
To: bharata@linux.vnet.ibm.com
Cc: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org,
Jan Blunck <j.blunck@tu-harburg.de>
Subject: Re: [RFC][PATCH 0/15] VFS based Union Mount
Date: Tue, 17 Apr 2007 10:35:50 -0400 [thread overview]
Message-ID: <4624DB46.6040400@cs.columbia.edu> (raw)
In-Reply-To: <20070417131459.GA4001@in.ibm.com>
Bharata B Rao wrote:
> Hi,
>
> Here is an attempt towards vfs based union mount implementation.
> Union mount provides the filesytem namespace unification feature.
> Unlike the traditional mounts which hide the contents of the mount point,
> the union mount presents the merged view of the mount point and the
> mounted filesytem.
does this approach allow one to add directories to the union and have it
behave normally. namely when imagine one has the situation
dir-b
dir-a/ (contains file foo)
if one unions this and deletes foo, that will create a whiteout entry in
dir-a
now, what happens if one does
dir-c
dir-b (now contains whiteout, from previous union).
dir-a (contains file foo)
will one see foo or not. i.e. are whiteouts only looked for in the
topmost dir, or in every dir?
next prev parent reply other threads:[~2007-04-17 14:37 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-04-17 13:14 [RFC][PATCH 0/15] VFS based Union Mount Bharata B Rao
2007-04-17 13:16 ` [RFC][PATCH 1/15] Add union mount documentation Bharata B Rao
2007-04-17 13:17 ` [RFC][PATCH 2/15] Add a new mount flag (MNT_UNION) for union mount Bharata B Rao
2007-04-17 13:17 ` [RFC][PATCH 3/15] Add the whiteout file type Bharata B Rao
2007-04-17 13:18 ` [RFC][PATCH 4/15] Add config options for union mount Bharata B Rao
2007-04-17 13:19 ` [RFC][PATCH 5/15] Introduce union stack Bharata B Rao
2007-04-17 22:08 ` Serge E. Hallyn
2007-04-18 3:27 ` Bharata B Rao
2007-04-17 13:20 ` [RFC][PATCH 6/15] Union-mount dentry reference counting Bharata B Rao
2007-04-17 13:20 ` [RFC][PATCH 7/15] Union-mount mounting Bharata B Rao
2007-04-17 13:21 ` [RFC][PATCH 8/15] Union-mount lookup Bharata B Rao
2007-04-17 13:22 ` [RFC][PATCH 9/15] Simple union-mount readdir Bharata B Rao
2007-04-17 13:22 ` [RFC][PATCH 10/15] In-kernel file copy between union mounted filesystems Bharata B Rao
2007-04-17 13:23 ` [RFC][PATCH 11/15] VFS whiteout handling Bharata B Rao
2007-04-17 13:23 ` [RFC][PATCH 12/15] ext2 whiteout support Bharata B Rao
2007-04-17 13:24 ` [RFC][PATCH 13/15] ext3 " Bharata B Rao
2007-04-17 13:24 ` [RFC][PATCH 14/15] tmpfs " Bharata B Rao
2007-04-17 13:25 ` [RFC][PATCH 15/15] Union-mount changes for NFS Bharata B Rao
2007-04-17 14:35 ` Shaya Potter [this message]
2007-04-17 16:30 ` [RFC][PATCH 0/15] VFS based Union Mount Bharata B Rao
2007-04-17 16:56 ` Shaya Potter
2007-04-18 7:19 ` Bharata B Rao
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