Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S964799AbaKMWAO (ORCPT ); Thu, 13 Nov 2014 17:00:14 -0500 Received: from mx1.redhat.com ([209.132.183.28]:48464 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933512AbaKMWAM (ORCPT ); Thu, 13 Nov 2014 17:00:12 -0500 From: Paul Moore To: Joe Perches Cc: Richard Guy Briggs , linux-audit@redhat.com, linux-kernel@vger.kernel.org, sgrubb@redhat.com, eparis@parisplace.org Subject: Re: [PATCH] audit: convert status version to a feature bitmap Date: Thu, 13 Nov 2014 17:00:07 -0500 Message-ID: <2576097.lHYG4OpOLo@sifl> Organization: Red Hat User-Agent: KMail/4.14.2 (Linux/3.16.7-gentoo; KDE/4.14.2; x86_64; ; ) In-Reply-To: <1415911097.4223.13.camel@perches.com> References: <1415911097.4223.13.camel@perches.com> MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thursday, November 13, 2014 12:38:17 PM Joe Perches wrote: > On Thu, 2014-11-13 at 15:29 -0500, Richard Guy Briggs wrote: > > The version field defined in the audit status structure was found to have > > limitations in terms of its expressibility of features supported. This is > > distict from the get/set features call to be able to command those > > features > > that are present. > > > > Converting this field from a version number to a feature bitmap will allow > > distributions to selectively backport and support certain features and > > will > > allow upstream to be able to deprecate features in the future. It will > > allow userspace clients to first query the kernel for which features are > > actually present and supported. Currently, EINVAL is returned rather > > than EOPNOTSUP, which isn't helpful in determining if there was an error > > in the command, or if it simply isn't supported yet. Past features are > > not represented by this bitmap, but their use may be converted to > > EOPNOTSUP if needed in the future. > > Maybe use DECLARE_BITMAP instead of u32 and test_bit/set_bit The audit_status struct is user visible and the version field is currently a u32 where DECLARE_BITMAP is an unsigned long. -- paul moore security and virtualization @ redhat -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/