linux-kernel - Re: [take 3] Use pid in inotify events.

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Message-ID: <20081118131937.GC16944@lst.de>
Date:	Tue, 18 Nov 2008 14:19:37 +0100
From:	Christoph Hellwig <hch@....de>
To:	mtk.manpages@...il.com
Cc:	Evgeniy Polyakov <zbr@...emap.net>, Robert Love <rlove@...ve.org>,
	linux-api@...r.kernel.org, linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Christoph Hellwig <hch@....de>
Subject: Re: [take 3] Use pid in inotify events.

On Mon, Nov 17, 2008 at 11:59:11AM -0500, Michael Kerrisk wrote:
> NAK.  If we are going to do this -- and I leave the security
> discussions to others more knowlegeable on that score than me -- then
> the API design should be better than this.  The current design is a
> hack.  Why exclude rename events?  Why re-use the cookie field?  The
> only answers I can guess at are that the current patch is less work to
> write.  IMO, there are (much) better design possibilities, using
> inotify1(), as I suggested earlier in this thread.

Yes, this kind of thing should be enable using an flag to inotify1, and
be consistant even for rename.  Doing it as a flag to inotify1 also has
the advantage to be able to return an -EPERM when the feature is
requested but not allowed instead of letting applications that assume it
silently fail.

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