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

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Message-ID: <20081124073018.GC10119@ioremap.net>
Date:	Mon, 24 Nov 2008 10:30:19 +0300
From:	Evgeniy Polyakov <zbr@...emap.net>
To:	John McCutchan <john@...nmccutchan.com>
Cc:	Arnd Bergmann <arnd@...db.de>, mtk.manpages@...il.com,
	Christoph Hellwig <hch@....de>, Robert Love <rlove@...ve.org>,
	linux-api@...r.kernel.org, linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [take 3] Use pid in inotify events.

Hi John.

On Sun, Nov 23, 2008 at 09:08:05PM -0800, John McCutchan (john@...nmccutchan.com) wrote:
> At this point I don't really want to see changes made to inotify. But,
> for arguments sake, why not something like inotify_init1 that takes a
> flag EXTENDED_EVENT which causes a larger event structure to be used.
> Something like,
> 
> struct inotify_event_extended
> {
>   s32 wd;
>   u32 mask;
>   u32 cookie;
>   u32 data[4];
>   char path[0];
> }
> 
> The data array could be used to store arbitrary extra information,
> specified by flags.

What will happen when above array is not enough to store needed info?
Although I do not see any reason to send start/offset for the IO itself,
but if it will be decided to do so, above array already is not large
enough. I think I will cook up preliminary patch to add nested
attributes into event structure like I described previously in the
thread to get people involved with working example.

-- 
	Evgeniy Polyakov
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