Archipelago » qemu

#!/bin/bash

#

# Test that sub-cluster allocating writes zero the rest of the cluster

#

# Copyright (C) 2010 IBM, Corp.

#

# This program is free software; you can redistribute it and/or modify

# it under the terms of the GNU General Public License as published by

# the Free Software Foundation; either version 2 of the License, or

# (at your option) any later version.

#

# This program is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

# GNU General Public License for more details.

#

# You should have received a copy of the GNU General Public License

# along with this program.  If not, see <http://www.gnu.org/licenses/>.

#

# creator

owner=stefanha@linux.vnet.ibm.com

seq=`basename $0`

echo "QA output created by $seq"

here=`pwd`

tmp=/tmp/$$

status=1	# failure is the default!

_cleanup()

{

	_cleanup_test_img

}

trap "_cleanup; exit \$status" 0 1 2 3 15

# get standard environment, filters and checks

. ./common.rc

. ./common.filter

_supported_fmt vmdk qcow qcow2 qed

_supported_proto generic

_supported_os Linux

size=128M

cluster_size=65536

subcluster_offset=1024

subcluster_size=2048

_make_test_img $size

# This first write causes an L2 table to be allocated so that the next write

# doesn't need to allocate one and is therefore at the end of the image file.

# Otherwise an L2 table could get in the way after the data cluster.

echo

echo "== writing first cluster to populate metadata =="

$QEMU_IO -c "write -pP 0xde $cluster_size $cluster_size" "$TEST_IMG" | _filter_qemu_io

echo

echo "== writing at sub-cluster granularity =="

$QEMU_IO -c "write -pP 0xa $subcluster_offset $subcluster_size" "$TEST_IMG" | _filter_qemu_io

echo

echo "== verify pattern =="

$QEMU_IO -c "read -pP 0xa $subcluster_offset $subcluster_size" "$TEST_IMG" | _filter_qemu_io

echo

echo "== verify zeroes before sub-cluster pattern =="

$QEMU_IO -c "read -pP 0 -l $subcluster_offset 0 $subcluster_size" "$TEST_IMG" | _filter_qemu_io

echo

echo "== verify zeroes after sub-cluster pattern =="

$QEMU_IO -c "read -pP 0 -l 512 -s $subcluster_size $subcluster_offset $(( subcluster_size + 512 ))" "$TEST_IMG" | _filter_qemu_io

# success, all done

echo "*** done"

rm -f $seq.full

status=0