From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759763Ab2HJSQS (ORCPT ); Fri, 10 Aug 2012 14:16:18 -0400 Received: from terminus.zytor.com ([198.137.202.10]:52815 "EHLO mail.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759187Ab2HJSQQ (ORCPT ); Fri, 10 Aug 2012 14:16:16 -0400 Message-ID: <50254FA6.3060806@zytor.com> Date: Fri, 10 Aug 2012 11:15:02 -0700 From: "H. Peter Anvin" User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:13.0) Gecko/20120605 Thunderbird/13.0 MIME-Version: 1.0 To: Stanislav Kinsbursky CC: Trond.Myklebust@netapp.com, davem@davemloft.net, linux-nfs@vger.kernel.org, eric.dumazet@gmail.com, xemul@parallels.com, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, bfields@fieldses.org, viro@zeniv.linux.org.uk, tim.c.chen@linux.intel.com, devel@openvz.org Subject: Re: [RFC PATCH 0/2] net: connect to UNIX sockets from specified root References: <20120810125701.7115.71612.stgit@localhost.localdomain> In-Reply-To: <20120810125701.7115.71612.stgit@localhost.localdomain> X-Enigmail-Version: 1.4.3 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 08/10/2012 05:57 AM, Stanislav Kinsbursky wrote: > Today, there is a problem in connecting of local SUNRPC thansports. These > transports uses UNIX sockets and connection itself is done by rpciod > workqueue. > But UNIX sockets lookup is done in context of process file system root. I.e. > all local thunsports are connecting in rpciod context. > This works nice until we will try to mount NFS from process with other root - > for example in container. This container can have it's own (nested) root and > rcpbind process, listening on it's own unix sockets. But NFS mount attempt in > this container will register new service (Lockd for example) in global rpcbind > - not containers's one. > > This patch set introduces kernel connect helper for UNIX stream sockets and > modifies unix_find_other() to be able to search from specified root. > It also replaces generic socket connect call for local transports by new > helper in SUNRPC layer. > > The following series implements... On that whole subject... Do we need a Unix domain socket equivalent to openat()? -hpa