linux-kernel - Re: [PATCH] nextfd(2)

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Date:	Mon, 2 Apr 2012 13:26:27 +0400
From:	Cyrill Gorcunov <gorcunov@...nvz.org>
To:	Konstantin Khlebnikov <khlebnikov@...nvz.org>
Cc:	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Alexey Dobriyan <adobriyan@...il.com>,
	"akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
	"viro@...iv.linux.org.uk" <viro@...iv.linux.org.uk>,
	"torvalds@...ux-foundation.org" <torvalds@...ux-foundation.org>,
	"drepper@...il.com" <drepper@...il.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-fsdevel@...r.kernel.org" <linux-fsdevel@...r.kernel.org>
Subject: Re: [PATCH] nextfd(2)

On Mon, Apr 02, 2012 at 12:38:25PM +0400, Konstantin Khlebnikov wrote:
> Alan Cox wrote:
> >>Can we add "pid" argument to be able to search next fd in other task?
> >>Together with sys_kcmp() this will be very useful for checkpoint/restore.
> >
> >That would raise all sorts of security questions unless protected, plus
> >its got races. If you want to do that and you have the rights you can do
> >it via procfs anyway.
> 
> Don't worry, I just asked. =) Seems like crtools dumps fd in the target-task context,
> so the current version is suitable.

Kind of ;) At moment we drain fds from dumpee task context to
our tool context and then dump them.

	Cyrill
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