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

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Message-ID: <20090805020534.GB1354@ucw.cz>
Date:	Wed, 5 Aug 2009 04:05:34 +0200
From:	Pavel Machek <pavel@....cz>
To:	Eric Paris <eparis@...hat.com>
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, hch@...radead.org,
	alan@...rguk.ukuu.org.uk, mmorley@....in
Subject: Re: fanotify - overall design before I start sending patches

BTW my -@...e.cz address no longer works. pavel@....cz should be ok.


> If a FAN_ACCESS_PERM or FAN_OPEN_PERM event is received the listener
> must send a response before the 5 second timeout.  If no response is
> sent before the 5 second timeout the original operation is allowed.  If
> this happens too many times (10 in a row) the fanotify group is evicted
> from the kernel and will not get any new events.  Sending a response is
> done using the setsockopt() call with the socket options set to
> FANOTIFY_ACCESS_RESPONSE.  The buffer should contain a structure like:

The timeout part of interface is very ugly. Will fanotify users have
to be realtime/mlocked?
								Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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