linux-kernel - Re: [rfc] fcntl: Add F_GETOWNER

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Message-ID: <20120328194613.GA3678@redhat.com>
Date:	Wed, 28 Mar 2012 21:46:14 +0200
From:	Oleg Nesterov <oleg@...hat.com>
To:	"Serge E. Hallyn" <serge@...lyn.com>
Cc:	Cyrill Gorcunov <gorcunov@...nvz.org>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Pavel Emelyanov <xemul@...allels.com>,
	"Serge E. Hallyn" <serge.hallyn@...onical.com>
Subject: Re: [rfc] fcntl: Add F_GETOWNER_UIDS option

On 03/28, Serge E. Hallyn wrote:
>
> If you want to
> just add the struct cred to the f_owner and do proper uid conversion,
> I'll support that too.  (Just grab a ref to the cred in
> fs/fcntl.c:f_modown(), and drop the ref in fs/file_table.c:__fput() ).

In this case f_owner.*uid should go away, I guess. And sigio_perm()
should be unified with kill_ok_by_cred() somehow (modulo
security_file_send_sigiotask).

Right?

Oleg.

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