From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Denis V. Lunev" Subject: Re: [PATCH net-next] [RFC] netns: enable cross-ve Unix sockets Date: Wed, 01 Oct 2008 15:32:56 +0400 Message-ID: <1222860776.23573.49.camel@iris.sw.ru> References: <1222858454-7843-1-git-send-email-den@openvz.org> <48E35B4C.1040303@fr.ibm.com> Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit Cc: containers@lists.linux-foundation.org, xemul@openvz.org, netdev@vger.kernel.org, benjamin.thery@bull.net, ebiederm@xmission.com To: Daniel Lezcano Return-path: Received: from mailhub.sw.ru ([195.214.232.25]:6778 "EHLO relay.sw.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752315AbYJALey (ORCPT ); Wed, 1 Oct 2008 07:34:54 -0400 In-Reply-To: <48E35B4C.1040303@fr.ibm.com> Sender: netdev-owner@vger.kernel.org List-ID: On Wed, 2008-10-01 at 13:13 +0200, Daniel Lezcano wrote: > Denis V. Lunev wrote: > > This patch opens a way to connect via Unix socket from one namespace > > to another if these sockets are opened via conventional filesystem > > interface. Such approach allows to share important services between > > namespaces in efficient way. > > > > This breach is controlled by the means of shared filesystem, i.e. if > > somebody really wants to isolate containers, he should start from > > filesystem separation. > > > > Signed-off-by: Denis V. Lunev > > --- > > net/unix/af_unix.c | 3 --- > > 1 files changed, 0 insertions(+), 3 deletions(-) > > > > diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c > > index 39d2173..0e1eccd 100644 > > --- a/net/unix/af_unix.c > > +++ b/net/unix/af_unix.c > > @@ -297,9 +297,6 @@ static struct sock *unix_find_socket_byinode(struct net *net, struct inode *i) > > &unix_socket_table[i->i_ino & (UNIX_HASH_SIZE - 1)]) { > > struct dentry *dentry = unix_sk(s)->dentry; > > > > - if (!net_eq(sock_net(s), net)) > > - continue; > > - > > if(dentry && dentry->d_inode == i) > > { > > sock_hold(s); > > Hi Denis, > > Do you have a list of the important services this isolation forbids ? (I > suppose there is syslog). we have asked from our customers for a shared MySQL server The full story is here :) http://bugzilla.openvz.org/show_bug.cgi?id=985