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From: Shaya Potter <spotter@cs.columbia.edu>
To: bharata@linux.vnet.ibm.com
Cc: Jan Engelhardt <jengelh@linux01.gwdg.de>,
	linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org,
	Jan Blunck <j.blunck@tu-harburg.de>
Subject: Re: [RFC][PATCH 10/14] In-kernel file copy between union mounted filesystems
Date: Fri, 18 May 2007 09:47:31 -0400	[thread overview]
Message-ID: <464DAE73.7000302@cs.columbia.edu> (raw)
In-Reply-To: <20070518111042.GC4869@in.ibm.com>

Bharata B Rao wrote:

> 
> Not really. This is called during copyup of a file residing in a lower
> layer. And that is done only for regular files.

That is broken.

You should be able to change the permissions on a device node on a layer 
that is RO.

so it would copy it up (1. mknod, 2. copy attributes) and then the 
appropriate attribute notification change would be called.

  reply	other threads:[~2007-05-18 14:31 UTC|newest]

Thread overview: 63+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-05-14  9:37 [RFC][PATCH 0/14] VFS based Union Mount(v1) Bharata B Rao
2007-05-14  9:38 ` [RFC][PATCH 1/14] Add union mount documentation Bharata B Rao
2007-05-14  9:39 ` [RFC][PATCH 2/14] Add a new mount flag (MNT_UNION) for union mount Bharata B Rao
2007-05-14 20:38   ` Jan Engelhardt
2007-05-15  8:16     ` Bharata B Rao
2007-05-15 12:06       ` Eric Van Hensbergen
2007-05-15 12:53         ` Jan Blunck
2007-05-14  9:39 ` [RFC][PATCH 3/14] Add the whiteout file type Bharata B Rao
2007-05-14 20:39   ` Jan Engelhardt
2007-05-15  6:00     ` Jan Blunck
2007-05-14  9:40 ` [RFC][PATCH 4/14] Add config options for union mount Bharata B Rao
2007-05-14  9:40 ` [RFC][PATCH 5/14] Introduce union stack Bharata B Rao
2007-05-14  9:40   ` Bharata B Rao
2007-05-14 20:23   ` Badari Pulavarty
2007-05-14 20:51     ` Jan Engelhardt
2007-05-19 10:18     ` Paul Dickson
2007-05-22 16:35       ` Jan Engelhardt
2007-05-23 13:25       ` Serge E. Hallyn
2007-05-14 20:48   ` Jan Engelhardt
2007-05-15  7:19     ` Jan Blunck
2007-05-14 22:40   ` Badari Pulavarty
2007-05-14 22:40     ` Badari Pulavarty
2007-05-15  6:28     ` Bharata B Rao
2007-05-14  9:41 ` [RFC][PATCH 6/14] Union-mount dentry reference counting Bharata B Rao
2007-05-14 20:57   ` Jan Engelhardt
2007-05-14  9:41 ` [RFC][PATCH 7/14] Union-mount mounting Bharata B Rao
2007-05-14  9:41   ` Bharata B Rao
2007-05-15  7:29   ` Jan Engelhardt
2007-05-16  5:04     ` Bharata B Rao
2007-05-14  9:42 ` [RFC][PATCH 8/14] Union-mount lookup Bharata B Rao
2007-05-15  7:57   ` Jan Engelhardt
2007-05-16  5:08     ` Bharata B Rao
2007-05-16 19:28       ` Jan Engelhardt
2007-05-16 20:06         ` Serge E. Hallyn
2007-05-15 14:00   ` Trond Myklebust
2007-05-18 11:05     ` Bharata B Rao
2007-05-14  9:42 ` [RFC][PATCH 9/14] Union-mount readdir Bharata B Rao
2007-05-14 10:43   ` Carsten Otte
2007-05-14 11:15     ` Bharata B Rao
2007-05-14  9:43 ` [RFC][PATCH 10/14] In-kernel file copy between union mounted filesystems Bharata B Rao
2007-05-16  7:57   ` Jan Engelhardt
2007-05-18 11:10     ` Bharata B Rao
2007-05-18 13:47       ` Shaya Potter [this message]
2007-05-22  3:13         ` Bharata B Rao
2007-05-22  6:25           ` Jan Engelhardt
2007-05-22  8:38             ` Bharata B Rao
2007-05-22 12:35               ` Shaya Potter
2007-05-23 10:41                 ` Bharata B Rao
2007-05-14  9:43 ` [RFC][PATCH 11/14] VFS whiteout handling Bharata B Rao
2007-05-16  8:06   ` Jan Engelhardt
2007-05-14  9:44 ` [RFC][PATCH 12/14] ext2 whiteout support Bharata B Rao
2007-05-16  8:07   ` Jan Engelhardt
2007-05-14  9:44 ` [RFC][PATCH 13/14] ext3 " Bharata B Rao
2007-05-14 20:16   ` Badari Pulavarty
2007-05-15  6:26     ` Bharata B Rao
2007-05-15  8:31       ` Jan Blunck
2007-05-14 20:17   ` Andreas Dilger
2007-05-14 20:35     ` Jan Blunck
2007-05-15 14:28       ` Theodore Tso
2007-05-14  9:45 ` [RFC][PATCH 14/14] tmpfs " Bharata B Rao
2007-05-14 16:13   ` Hugh Dickins
2007-05-14 19:20     ` Jan Blunck
2007-05-14 19:35       ` Hugh Dickins

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