From mboxrd@z Thu Jan  1 00:00:00 1970
From: Christoph Hellwig <hch@lst.de>
Subject: [PATCH] fix FREEZE/THAW compat_ioctl regression
Date: Mon, 16 Feb 2009 13:57:25 +0100
Message-ID: <20090216125725.GA3420@lst.de>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Cc: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org
To: Takashi Sato <t-sato@yk.jp.nec.com>
Return-path: <linux-kernel-owner+glk-linux-kernel-3=40m.gmane.org-S1757710AbZBPM5l@vger.kernel.org>
Content-Disposition: inline
Sender: linux-kernel-owner@vger.kernel.org
List-Id: linux-fsdevel.vger.kernel.org

Commit 8e961870bb9804110d5c8211d5d9d500451c4518 removed the FREEZE/THAW
handling in xfs_compat_ioctl but never added any compat handler back, so
now any freeze/thaw request from a 32-bit binary ond 64-bit userspace
will fail.

As these ioctls are 32/64-bit compatible two simple COMPATIBLE_IOCTL
entries in fs/compat_ioctl.c will do the job.


Signed-off-by: Christoph Hellwig <hch@lst.de>

Index: xfs/fs/compat_ioctl.c
===================================================================
--- xfs.orig/fs/compat_ioctl.c	2009-02-16 12:48:23.000000000 +0000
+++ xfs/fs/compat_ioctl.c	2009-02-16 12:49:34.000000000 +0000
@@ -1913,6 +1913,9 @@
 /* 0x00 */
 COMPATIBLE_IOCTL(FIBMAP)
 COMPATIBLE_IOCTL(FIGETBSZ)
+/* 'X' - originally XFS but some now in the VFS */
+COMPATIBLE_IOCTL(FIFREEZE)
+COMPATIBLE_IOCTL(FITHAW)
 /* RAID */
 COMPATIBLE_IOCTL(RAID_VERSION)
 COMPATIBLE_IOCTL(GET_ARRAY_INFO)