Date: Tue, 23 Jun 2009 17:06:10 +0100
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: David Howells <dhowells@redhat.com>
Cc: Miklos Szeredi <miklos@szeredi.hu>, dhowells@redhat.com, hch@infradead.org,
       linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
       torvalds@linux-foundation.org, viro@ZenIV.linux.org.uk, adilger@sun.com,
       akpm@linux-foundation.org
Subject: Re: [RFC] O_NOACC: open without any access
Message-ID: <20090623170610.7fd8a3f8@lxorguk.ukuu.org.uk>
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On Tue, 23 Jun 2009 16:52:17 +0100
David Howells <dhowells@redhat.com> wrote:

> Miklos Szeredi <miklos@szeredi.hu> wrote:
> 
> > Right, but that makes it useless for things which want to open it
> > despite having no permission on the file.
> 
> For my purposes, if I'm going to emulate pioctl() in userspace, I also need to
> be able to open device files that don't have drivers available, and when you
> do open a dev file in this manner, it must _not_ call the ->open() routine of
> the device driver

So how are you going to make that work in conjunction with the in
progress work on doing stuff like revoke(), and with module reference
counting ?
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