1#!/bin/bash 2# 3# Test that sub-cluster allocating writes zero the rest of the cluster 4# 5# Copyright (C) 2010 IBM, Corp. 6# 7# This program is free software; you can redistribute it and/or modify 8# it under the terms of the GNU General Public License as published by 9# the Free Software Foundation; either version 2 of the License, or 10# (at your option) any later version. 11# 12# This program is distributed in the hope that it will be useful, 13# but WITHOUT ANY WARRANTY; without even the implied warranty of 14# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15# GNU General Public License for more details. 16# 17# You should have received a copy of the GNU General Public License 18# along with this program. If not, see <http://www.gnu.org/licenses/>. 19# 20 21# creator 22owner=stefanha@linux.vnet.ibm.com 23 24seq=`basename $0` 25echo "QA output created by $seq" 26 27here=`pwd` 28tmp=/tmp/$$ 29status=1 # failure is the default! 30 31_cleanup() 32{ 33 _cleanup_test_img 34} 35trap "_cleanup; exit \$status" 0 1 2 3 15 36 37# get standard environment, filters and checks 38. ./common.rc 39. ./common.filter 40 41_supported_fmt vmdk qcow qcow2 qed 42_supported_proto generic 43_supported_os Linux 44 45 46size=128M 47cluster_size=65536 48subcluster_offset=1024 49subcluster_size=2048 50_make_test_img $size 51 52# This first write causes an L2 table to be allocated so that the next write 53# doesn't need to allocate one and is therefore at the end of the image file. 54# Otherwise an L2 table could get in the way after the data cluster. 55echo 56echo "== writing first cluster to populate metadata ==" 57$QEMU_IO -c "write -pP 0xde $cluster_size $cluster_size" "$TEST_IMG" | _filter_qemu_io 58 59echo 60echo "== writing at sub-cluster granularity ==" 61$QEMU_IO -c "write -pP 0xa $subcluster_offset $subcluster_size" "$TEST_IMG" | _filter_qemu_io 62 63echo 64echo "== verify pattern ==" 65$QEMU_IO -c "read -pP 0xa $subcluster_offset $subcluster_size" "$TEST_IMG" | _filter_qemu_io 66 67echo 68echo "== verify zeroes before sub-cluster pattern ==" 69$QEMU_IO -c "read -pP 0 -l $subcluster_offset 0 $subcluster_size" "$TEST_IMG" | _filter_qemu_io 70 71echo 72echo "== verify zeroes after sub-cluster pattern ==" 73$QEMU_IO -c "read -pP 0 -l 512 -s $subcluster_size $subcluster_offset $(( subcluster_size + 512 ))" "$TEST_IMG" | _filter_qemu_io 74 75# success, all done 76echo "*** done" 77rm -f $seq.full 78status=0 79