Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1762111AbYCWNCZ (ORCPT ); Sun, 23 Mar 2008 09:02:25 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755684AbYCWNCL (ORCPT ); Sun, 23 Mar 2008 09:02:11 -0400 Received: from fg-out-1718.google.com ([72.14.220.156]:36356 "EHLO fg-out-1718.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1761944AbYCWNCJ (ORCPT ); Sun, 23 Mar 2008 09:02:09 -0400 From: Denys Vlasenko To: Pavel Emelyanov Subject: Re: [PATCH] Make /proc/net a symlink on /proc/self/net Date: Sun, 23 Mar 2008 14:00:41 +0100 User-Agent: KMail/1.8.2 Cc: Andrew Morton , David Miller , Linux Netdev List , Linux Kernel Mailing List , "Eric W. Biederman" , Alexey Dobriyan References: <47CE8FF7.7000701@openvz.org> In-Reply-To: <47CE8FF7.7000701@openvz.org> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200803231400.41397.vda.linux@googlemail.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1192 Lines: 27 On Wednesday 05 March 2008 13:20, Pavel Emelyanov wrote: > Current /proc/net is done with so called "shadows", but current > implementation is broken and has little chances to get fixed. > > The problem is that dentries subtree of /proc/net directory has > fancy revalidation rules to make processes living in different > net namespaces see different entries in /proc/net subtree, but > currently, tasks see in the /proc/net subdir the contents of any > other namespace, depending on who opened the file first. > > The proposed fix is to turn /proc/net into a symlink, which points > to /proc/self/net, which in turn shows what previously was in > /proc/net - the network-related info, from the net namespace the > appropriate task lives in. > > # ls -l /proc/net > lrwxrwxrwx 1 root root 8 Mar 5 15:17 /proc/net -> self/net This broke tools which read /proc/net/dev. Under non-root, they are no longer working. This is a regression. -- vda -- 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/