Return-Path: <linux-kernel-owner@vger.kernel.org>
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
        id S1761434AbcJ1Pwz (ORCPT <rfc822;w@1wt.eu>);
        Fri, 28 Oct 2016 11:52:55 -0400
Received: from smtp.citrix.com ([66.165.176.89]:12110 "EHLO SMTP.CITRIX.COM"
        rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP
        id S1761345AbcJ1Pwt (ORCPT <rfc822;linux-kernel@vger.kernel.org>);
        Fri, 28 Oct 2016 11:52:49 -0400
X-IronPort-AV: E=Sophos;i="5.31,410,1473120000"; 
   d="scan'208";a="386656934"
From: David Vrabel <david.vrabel@citrix.com>
To: Alexander Viro <viro@zeniv.linux.org.uk>
CC: David Vrabel <david.vrabel@citrix.com>,
        <linux-fsdevel@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
        <xen-devel@lists.xenproject.org>,
        "Boris Ostrovsky" <boris.ostrovsky@oracle.com>,
        Juergen Gross <jgross@suse.com>
Subject: [PATCH v4 0/3] libfs,xenfs: replace /proc/xen/xenbus with a symlink
Date: Fri, 28 Oct 2016 16:52:36 +0100
Message-ID: <1477669959-9486-1-git-send-email-david.vrabel@citrix.com>
X-Mailer: git-send-email 2.1.4
MIME-Version: 1.0
Content-Type: text/plain
X-DLP: MIA2
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org
Content-Length: 614
Lines: 21

Using /proc/xen/xenbus can cause deadlocks on the atomic file position
mutex since this file should behave like a character device and not a
regular file.  This is easiest to achive by making it a symlink to the
existing /dev/xen/xenbus device.

This requires extending simple_fill_super() to add symlinks as well as
regular files.

David

Changes in v4:
- Switch on file type in simple_fill_super()
- Make xen_xenus_fops and xen_privcmd_fops static
- Rebased on v4.9-rc2.
- Add patch from Seth for namespace support.

Changes in v3:
- Rebased on v4.7-rc5.

Changes in v2:
- Simplified simple_fill_super() change.