linux-kernel - Re: fanotify - overall design before I start sending patches

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Message-Id: <1249318535.2447.26.camel@dhcp231-106.rdu.redhat.com>
Date:	Mon, 03 Aug 2009 12:55:35 -0400
From:	Eric Paris <eparis@...hat.com>
To:	Christoph Hellwig <hch@...radead.org>
Cc:	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	malware-list@...sg.printk.net, Valdis.Kletnieks@...edu,
	greg@...ah.com, jcm@...hat.com, douglas.leeder@...hos.com,
	tytso@....edu, arjan@...radead.org, david@...g.hm,
	jengelh@...ozas.de, aviro@...hat.com, mrkafk@...il.com,
	alexl@...hat.com, jack@...e.cz, tvrtko.ursulin@...hos.com,
	a.p.zijlstra@...llo.nl, alan@...rguk.ukuu.org.uk, mmorley@....in,
	pavel@...e.cz
Subject: Re: fanotify - overall design before I start sending patches

On Mon, 2009-08-03 at 12:23 -0400, Christoph Hellwig wrote:
> Before we get started:  You promised yo get rid of the dnotify and
> inotify fields in the inode when moving over those two to fsnotify.
> While the dnotify fields are gone the inotify_watches and inotify_mutex
> fields are still around.  I'd really like to see this done before we
> move on.

In linux-next you will find that those fields are completely unused and
the kernel can be compiled without them with 0 lose of functionality
(they are still used in linus's kernel by the audit system)

The only reason I didn't remove them entirely is because the inotify
kernel interface is EXPORT_SYMBOL.  I plan to leave it around for a
little bit until I'm sure out of tree users don't exist or at least had
enough time to realize they need to use fsnotify.

For all situations I know of at least, those 2 fields can be safely
compiled out.  (aka !CONFIG_INOTIFY)

-Eric

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