svn commit: r250979 - user/pho/stress2/misc

[Peter Holm]

Author: pho
Date: Sat May 25 11:42:25 2013
New Revision: 250979
URL: http://svnweb.freebsd.org/changeset/base/250979

Log:
  Added a regression test for MD corruption, fixed by r250966.

Added:
  user/pho/stress2/misc/md4.sh   (contents, props changed)

Added: user/pho/stress2/misc/md4.sh
==============================================================================
--- /dev/null	00:00:00 1970	(empty, because file is newly added)
+++ user/pho/stress2/misc/md4.sh	Sat May 25 11:42:25 2013	(r250979)
@@ -0,0 +1,46 @@
+#!/bin/sh
+
+#
+# Copyright (c) 2013 Peter Holm <pho at FreeBSD.org>
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in the
+#    documentation and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+# SUCH DAMAGE.
+#
+# $FreeBSD$
+#
+
+# Demonstrate data corruption on the swap-backed md.
+# Test scenario by Nigel Williams <njwilliams swin edu au>.
+# Fixed in r250966.
+
+[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1
+
+status=0
+MD_DEV=`mdconfig -an -t swap -s 1m -x 63 -y 16`
+fdisk -I md$MD_DEV > /dev/null 2>&1
+bsdlabel -w -B md${MD_DEV}s1 || exit 1
+dd if=/dev/md$MD_DEV of=/dev/null bs=64k 2>&1 |
+	egrep -v "records|transferred"
+bsdlabel md${MD_DEV}s1 > /dev/null || 
+	{ echo FAIL; status=1; }
+mdconfig -d -u $MD_DEV
+exit $status