From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from relay.sgi.com (relay3.corp.sgi.com [198.149.34.15]) by oss.sgi.com (Postfix) with ESMTP id 898A67F4E for ; Wed, 7 Aug 2013 10:01:41 -0500 (CDT) Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by relay3.corp.sgi.com (Postfix) with ESMTP id 089DEAC009 for ; Wed, 7 Aug 2013 08:01:37 -0700 (PDT) Received: from hallynmail2 (static.92.5.9.176.clients.your-server.de [176.9.5.92]) by cuda.sgi.com with ESMTP id VVunGoKOE8qzQcUa for ; Wed, 07 Aug 2013 08:01:19 -0700 (PDT) Date: Wed, 7 Aug 2013 15:01:19 +0000 From: "Serge E. Hallyn" Subject: Re: [PATCH v7 7/7] enable building user namespace with xfs Message-ID: <20130807150119.GA28730@mail.hallyn.com> References: <20130729230709.11033b2d@oracle.com> <20130730234021.GR3111@sgi.com> <20130731002119.GR13468@dastard> <20130731132523.GS3111@sgi.com> <20130731232852.GE7118@dastard> <20130807145930.GA28565@mail.hallyn.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20130807145930.GA28565@mail.hallyn.com> List-Id: XFS Filesystem from SGI List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: xfs-bounces@oss.sgi.com Sender: xfs-bounces@oss.sgi.com To: "Serge E. Hallyn" Cc: Dwight Engen , Ben Myers , "Michael Kerrisk (man-pages)" , xfs@oss.sgi.com Gah, forgot to actually add Michael to the cc:, sorry. Quoting Serge E. Hallyn (serge@hallyn.com): > Quoting Dave Chinner (david@fromorbit.com): > > On Wed, Jul 31, 2013 at 08:25:23AM -0500, Ben Myers wrote: > > > Hey, > > > > > > On Wed, Jul 31, 2013 at 10:21:19AM +1000, Dave Chinner wrote: > > > > On Tue, Jul 30, 2013 at 06:40:21PM -0500, Ben Myers wrote: > > > > > On Mon, Jul 29, 2013 at 11:07:09PM -0400, Dwight Engen wrote: > > > > > > >From e6a9ee0cfa0ed40484f66bc1726dc19de36038b8 Mon Sep 17 00:00:00 2001 > > > > > > From: Dwight Engen > > > > > > Date: Tue, 2 Jul 2013 09:52:54 -0400 > > > > > > Subject: [PATCH 7/7] enable building user namespace with xfs > > > > > > > > > > > > Signed-off-by: Dwight Engen > > > > > > > > > > Was there a patch running around to limit bulkstat to init_user_ns? Any other > > > > > items that needed to be addressed before applying this patch? > > > > > > > > Bulkstat has a capable(CAP_SYS_ADMIN) check and therefore can only be > > > > executed in the init name space. Similarly, all the open-by-handle > > > > interfaces have the same capable() checks so they can only be > > > > executed int he init name space, too. > > > > > > Gah. I was under the impression that you could have a process with > > > CAP_SYS_ADMIN in a namespace other than init_user_ns. > > > > Ben, until about a week and a half ago I was also working under that > > same understanding as you. So don't feel bad about not knowing > > about this basic, fundamental rule because it is completely > > undocumented and it's not obvious to anyone reading the code until > > someone points it out.... > > It's actually all documented in new manpages like namespaces(7) and > user_namespaces(7). Unfortunately those don't seem to have been released yet. > > Michael, I don't see any git development/experimental git branch at > kernel.org/pub/scm/docs/man-pages - do you have those pages up > somewhere? > > thanks, > -serge > > _______________________________________________ > xfs mailing list > xfs@oss.sgi.com > http://oss.sgi.com/mailman/listinfo/xfs _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs