linux-kernel - Re: [patch 7/8] fdmap v2

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Message-ID: <Pine.LNX.4.64.0706071645000.6445@alien.or.mcafeemobile.com>
Date:	Thu, 7 Jun 2007 17:04:28 -0700 (PDT)
From:	Davide Libenzi <davidel@...ilserver.org>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
cc:	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Ulrich Drepper <drepper@...hat.com>,
	Ingo Molnar <mingo@...e.hu>, Eric Dumazet <dada1@...mosbay.com>
Subject: Re: [patch 7/8] fdmap v2 - implement sys_socket2

On Thu, 7 Jun 2007, Linus Torvalds wrote:

> 
> 
> On Thu, 7 Jun 2007, Davide Libenzi wrote:
> > 
> > We'd still need sys_nonseqfd() though, to move/dup legacy fds into the 
> > non-sequential area.
> 
> Umm. No we don't. Because it's no more than 
> 
> 	indirect_syscall(dup, FD_NONSEQ)
> 
> isn't it?

Hmm, ok. It need some changes since sys_dup() and F_DUPFD uses common code 
at the moment, but it'd ok.
Basically, everything that calls get_unused_fd() can get the magic 
indirect_syscall() settings. I was just planning to localize the 
sequential/non-sequential behaviour just in there.
The sys_dup(), sys_dup2() and F_DUPFD have some custom code, although 
sys_dup() should really use get_unused_fd() in any way.

- Davide

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