#!/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` 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