linux-kernel - [PATCH v4 0/3] libfs,xenfs: replace /proc/xen/xenbus with a symlink

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Date:   Fri, 28 Oct 2016 16:52:36 +0100
From:   David Vrabel <david.vrabel@...rix.com>
To:     Alexander Viro <viro@...iv.linux.org.uk>
CC:     David Vrabel <david.vrabel@...rix.com>,
        <linux-fsdevel@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <xen-devel@...ts.xenproject.org>,
        "Boris Ostrovsky" <boris.ostrovsky@...cle.com>,
        Juergen Gross <jgross@...e.com>
Subject: [PATCH v4 0/3] libfs,xenfs: replace /proc/xen/xenbus with a symlink

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.