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Date: Tue, 27 Aug 2002 14:27:50 +0100
From: Christoph Hellwig <hch@infradead.org>
To: "Adam J. Richter" <adam@yggdrasil.com>
Cc: aia21@cantab.net, kernel@bonin.ca, linux-kernel@vger.kernel.org
Subject: Re: Loop devices under NTFS
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On Tue, Aug 27, 2002 at 06:23:48AM -0700, Adam J. Richter wrote:
> 	Are you complaining about something in loop.c,

Yes.  Anything but the filesystem itself and the generic read/write path
is not supposed to use address space operations directly.

> >Note that there is a more severe bug in loop.c:  it's abuse of
> >do_generic_file_read.  
> 
> 	Could you please elaborate on this and give an example where
> it return incorrect data, deadlock, generate a kernel oops, etc.?

Depending on the filesystem implementation _anything_ may happen.
With current intree filesystems the only real life problem is that
it doesn't work on certain filesystems.  I think at least the network
filesystems might be oopsable with some preparation.

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