From mboxrd@z Thu Jan 1 00:00:00 1970 From: James Morris Subject: Re: [AppArmor 39/45] AppArmor: Profile loading and manipulation, pathname matching Date: Fri, 15 Jun 2007 21:21:57 -0400 (EDT) Message-ID: References: <20070514110607.549397248@suse.de> <200706090003.57722.agruen@suse.de> <20070609001703.GA17644@kroah.com> <466C303E.5010304@novell.com> <20070615165054.GA11345@kroah.com> <20070615200623.GA2616@elf.ucw.cz> <20070615211157.GB7337@kroah.com> <20070615235041.GC15056@kroah.com> Mime-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Cc: Pavel Machek , Crispin Cowan , Andreas Gruenbacher , Stephen Smalley , jjohansen@suse.de, linux-kernel@vger.kernel.org, linux-security-module@vger.kernel.org, linux-fsdevel@vger.kernel.org To: Greg KH Return-path: In-Reply-To: <20070615235041.GC15056@kroah.com> Sender: linux-security-module-owner@vger.kernel.org List-Id: linux-fsdevel.vger.kernel.org On Fri, 15 Jun 2007, Greg KH wrote: > Oh great, then things like source code control systems would have no > problems with new files being created under them, or renaming whole > trees. It depends -- I think we may be talking about different things. If you're using inotify to watch for new files and kick something in userspace to relabel them, it could take a while to relabel a lot of files, although there are likely some gains to be had from parallel relabeling which we've not explored. What I was saying is that you can use traditional SELinux labeling policy underneath that to ensure that there is always a safe label on each file before it is relabeled from userspace. > So, so much for the "it's going to be too slow re-labeling everything" > issue, as it's not even required for almost all situations :) You could probably get an idea of the cost by running something like: $ time find /usr/src/linux | xargs setfattr -n user.foo -v bar On my system, it takes about 1.2 seconds to label a fully checked out kernel source tree with ~23,000 files in this manner, on a stock standard ext3 filesystem with a SATA drive. - James -- James Morris