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

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Message-ID: <20090727175225.GA27999@ioremap.net>
Date:	Mon, 27 Jul 2009 21:52:25 +0400
From:	Evgeniy Polyakov <zbr@...emap.net>
To:	Jamie Lokier <jamie@...reable.org>
Cc:	Eric Paris <eparis@...hat.com>, david@...g.hm,
	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, 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

Hi.

On Fri, Jul 24, 2009 at 10:44:01PM +0100, Jamie Lokier (jamie@...reable.org) wrote:
> > No, I will NOT EVER pass a pathname.  Period.  End of story.  I stated
> > the if userspace wants to deal with pathnames (and they understand the
> > system setup well enough to know if pathnames even make sense to them)
> > they can use readlink(2) on /proc/self/fd
> 
> That makes sense.
> 
> In most cases where events trigger userspace cache or index updates,
> userspace already has enough information to calculate the path (and
> any derived data) from the inode number (in the case of non-hard-link
> files) or from the inode number of the parent directory and the name
> (not full path).

Except that rlimits may forbid to open new file descriptor while queue
length is enough to put another event with the full or partial path
name.

I will read initial mail next, but if it is not described there, how
rlimit problem is handled?

-- 
	Evgeniy Polyakov
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