#!/bin/bash # # Test case for qcow2 metadata cache size specification # # Copyright (C) 2014 Red Hat, Inc. # # 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=mreitz@redhat.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 qcow2 _supported_proto file nfs _supported_os Linux IMG_SIZE=64K _make_test_img $IMG_SIZE $QEMU_IO -c 'write -P 42 0 64k' "$TEST_IMG" | _filter_qemu_io echo echo '=== Testing invalid option combinations ===' echo # all sizes set at the same time $QEMU_IO -c "open -o cache-size=1.25M,l2-cache-size=1M,refcount-cache-size=0.25M $TEST_IMG" \ 2>&1 | _filter_testdir | _filter_imgfmt # l2-cache-size may not exceed cache-size $QEMU_IO -c "open -o cache-size=1M,l2-cache-size=2M $TEST_IMG" 2>&1 \ | _filter_testdir | _filter_imgfmt # refcount-cache-size may not exceed cache-size $QEMU_IO -c "open -o cache-size=1M,refcount-cache-size=2M $TEST_IMG" 2>&1 \ | _filter_testdir | _filter_imgfmt # 0 should be a valid size (e.g. for enforcing the minimum), so this should not # work $QEMU_IO -c "open -o cache-size=0,l2-cache-size=0,refcount-cache-size=0 $TEST_IMG" \ 2>&1 | _filter_testdir | _filter_imgfmt echo echo '=== Testing valid option combinations ===' echo # There should be a reasonable and working minimum $QEMU_IO -c "open -o cache-size=0 $TEST_IMG" -c 'read -P 42 0 64k' \ | _filter_qemu_io $QEMU_IO -c "open -o l2-cache-size=0 $TEST_IMG" -c 'read -P 42 0 64k' \ | _filter_qemu_io $QEMU_IO -c "open -o refcount-cache-size=0 $TEST_IMG" -c 'read -P 42 0 64k' \ | _filter_qemu_io # Derive cache sizes from combined size (with a reasonable ratio, but we cannot # test that) $QEMU_IO -c "open -o cache-size=2M $TEST_IMG" -c 'read -P 42 0 64k' \ | _filter_qemu_io # Fix one cache, derive the other $QEMU_IO -c "open -o cache-size=2M,l2-cache-size=1M $TEST_IMG" \ -c 'read -P 42 0 64k' \ | _filter_qemu_io $QEMU_IO -c "open -o cache-size=2M,refcount-cache-size=1M $TEST_IMG" \ -c 'read -P 42 0 64k' \ | _filter_qemu_io # Directly set both caches $QEMU_IO -c "open -o l2-cache-size=1M,refcount-cache-size=0.25M $TEST_IMG" \ -c 'read -P 42 0 64k' \ | _filter_qemu_io echo echo '=== Testing minimal L2 cache and COW ===' echo $QEMU_IMG snapshot -c foo "$TEST_IMG" # This requires a COW operation, which accesses two L2 tables simultaneously # (COW source and destination), so there must be enough space in the cache to # place both tables there (and qemu should not crash) $QEMU_IO -c "open -o cache-size=0 $TEST_IMG" -c 'write 0 64k' | _filter_qemu_io # success, all done echo '*** done' rm -f $seq.full status=0