1#!/bin/bash 2# 3# Test case for qcow2 metadata cache size specification 4# 5# Copyright (C) 2014 Red Hat, Inc. 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=mreitz@redhat.com 23 24seq=$(basename $0) 25echo "QA output created by $seq" 26 27here=$PWD 28status=1 # failure is the default! 29 30_cleanup() 31{ 32 _cleanup_test_img 33} 34trap "_cleanup; exit \$status" 0 1 2 3 15 35 36# get standard environment, filters and checks 37. ./common.rc 38. ./common.filter 39 40_supported_fmt qcow2 41_supported_proto file nfs 42_supported_os Linux 43# Internal snapshots are (currently) impossible with refcount_bits=1 44_unsupported_imgopts 'refcount_bits=1[^0-9]' 45 46IMG_SIZE=64K 47 48_make_test_img $IMG_SIZE 49$QEMU_IO -c 'write -P 42 0 64k' "$TEST_IMG" | _filter_qemu_io 50 51echo 52echo '=== Testing invalid option combinations ===' 53echo 54 55# all sizes set at the same time 56$QEMU_IO -c "open -o cache-size=1.25M,l2-cache-size=1M,refcount-cache-size=0.25M $TEST_IMG" \ 57 2>&1 | _filter_testdir | _filter_imgfmt 58# l2-cache-size may not exceed cache-size 59$QEMU_IO -c "open -o cache-size=1M,l2-cache-size=2M $TEST_IMG" 2>&1 \ 60 | _filter_testdir | _filter_imgfmt 61# refcount-cache-size may not exceed cache-size 62$QEMU_IO -c "open -o cache-size=1M,refcount-cache-size=2M $TEST_IMG" 2>&1 \ 63 | _filter_testdir | _filter_imgfmt 64# 0 should be a valid size (e.g. for enforcing the minimum), so this should not 65# work 66$QEMU_IO -c "open -o cache-size=0,l2-cache-size=0,refcount-cache-size=0 $TEST_IMG" \ 67 2>&1 | _filter_testdir | _filter_imgfmt 68 69echo 70echo '=== Testing valid option combinations ===' 71echo 72 73# There should be a reasonable and working minimum 74$QEMU_IO -c "open -o cache-size=0 $TEST_IMG" -c 'read -P 42 0 64k' \ 75 | _filter_qemu_io 76$QEMU_IO -c "open -o l2-cache-size=0 $TEST_IMG" -c 'read -P 42 0 64k' \ 77 | _filter_qemu_io 78$QEMU_IO -c "open -o refcount-cache-size=0 $TEST_IMG" -c 'read -P 42 0 64k' \ 79 | _filter_qemu_io 80 81# Derive cache sizes from combined size (with a reasonable ratio, but we cannot 82# test that) 83$QEMU_IO -c "open -o cache-size=2M $TEST_IMG" -c 'read -P 42 0 64k' \ 84 | _filter_qemu_io 85# Fix one cache, derive the other 86$QEMU_IO -c "open -o cache-size=2M,l2-cache-size=1M $TEST_IMG" \ 87 -c 'read -P 42 0 64k' \ 88 | _filter_qemu_io 89$QEMU_IO -c "open -o cache-size=2M,refcount-cache-size=1M $TEST_IMG" \ 90 -c 'read -P 42 0 64k' \ 91 | _filter_qemu_io 92# Directly set both caches 93$QEMU_IO -c "open -o l2-cache-size=1M,refcount-cache-size=0.25M $TEST_IMG" \ 94 -c 'read -P 42 0 64k' \ 95 | _filter_qemu_io 96 97echo 98echo '=== Testing minimal L2 cache and COW ===' 99echo 100 101$QEMU_IMG snapshot -c foo "$TEST_IMG" 102# This requires a COW operation, which accesses two L2 tables simultaneously 103# (COW source and destination), so there must be enough space in the cache to 104# place both tables there (and qemu should not crash) 105$QEMU_IO -c "open -o cache-size=0 $TEST_IMG" -c 'write 0 64k' | _filter_qemu_io 106 107# success, all done 108echo '*** done' 109rm -f $seq.full 110status=0 111