linux-kernel - Re: [RFC] O_NOACC: open without any access

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Message-ID: <20090623173340.66f71915@lxorguk.ukuu.org.uk>
Date:	Tue, 23 Jun 2009 17:33:40 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	David Howells <dhowells@...hat.com>
Cc:	dhowells@...hat.com, Miklos Szeredi <miklos@...redi.hu>,
	hch@...radead.org, linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org, torvalds@...ux-foundation.org,
	viro@...IV.linux.org.uk, adilger@....com, akpm@...ux-foundation.org
Subject: Re: [RFC] O_NOACC: open without any access

On Tue, 23 Jun 2009 17:10:52 +0100
David Howells <dhowells@...hat.com> wrote:

> Alan Cox <alan@...rguk.ukuu.org.uk> wrote:
> 
> > 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 ?
> 
> Reference count on which module?  This would not take a reference on the device
> driver as it would not refer to it, but would still have a file struct, an
> inode struct and a dentry struct on the underlying fs.

Which means the device could be unloaded, something else loaded and your
handle wouldn't be invalidated but would be stale ?

Perhaps it would make more sense to me if I knew why you needed to do
this ?
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