1#!/usr/bin/env 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 27status=1 # failure is the default! 28 29_cleanup() 30{ 31 _cleanup_test_img 32} 33trap "_cleanup; exit \$status" 0 1 2 3 15 34 35# get standard environment, filters and checks 36. ./common.rc 37. ./common.filter 38 39_supported_fmt qcow2 40_supported_proto file nfs 41# Internal snapshots are (currently) impossible with refcount_bits=1 42_unsupported_imgopts 'refcount_bits=1[^0-9]' 43 44IMG_SIZE=64K 45 46_make_test_img $IMG_SIZE 47$QEMU_IO -c 'write -P 42 0 64k' "$TEST_IMG" | _filter_qemu_io 48 49echo 50echo '=== Testing invalid option combinations ===' 51echo 52 53# all sizes set at the same time 54$QEMU_IO -c "open -o cache-size=1.25M,l2-cache-size=1M,refcount-cache-size=0.25M $TEST_IMG" \ 55 2>&1 | _filter_testdir | _filter_imgfmt 56# l2-cache-size may not exceed cache-size 57$QEMU_IO -c "open -o cache-size=1M,l2-cache-size=2M $TEST_IMG" 2>&1 \ 58 | _filter_testdir | _filter_imgfmt 59# refcount-cache-size may not exceed cache-size 60$QEMU_IO -c "open -o cache-size=1M,refcount-cache-size=2M $TEST_IMG" 2>&1 \ 61 | _filter_testdir | _filter_imgfmt 62# 0 should be a valid size (e.g. for enforcing the minimum), so this should not 63# work 64$QEMU_IO -c "open -o cache-size=0,l2-cache-size=0,refcount-cache-size=0 $TEST_IMG" \ 65 2>&1 | _filter_testdir | _filter_imgfmt 66 67# Invalid cache entry sizes 68$QEMU_IO -c "open -o l2-cache-entry-size=256 $TEST_IMG" \ 69 2>&1 | _filter_testdir | _filter_imgfmt 70$QEMU_IO -c "open -o l2-cache-entry-size=4242 $TEST_IMG" \ 71 2>&1 | _filter_testdir | _filter_imgfmt 72$QEMU_IO -c "open -o l2-cache-entry-size=128k $TEST_IMG" \ 73 2>&1 | _filter_testdir | _filter_imgfmt 74 75echo 76echo '=== Testing valid option combinations ===' 77echo 78 79# There should be a reasonable and working minimum 80$QEMU_IO -c "open -o cache-size=0 $TEST_IMG" -c 'read -P 42 0 64k' \ 81 | _filter_qemu_io 82$QEMU_IO -c "open -o l2-cache-size=0 $TEST_IMG" -c 'read -P 42 0 64k' \ 83 | _filter_qemu_io 84$QEMU_IO -c "open -o refcount-cache-size=0 $TEST_IMG" -c 'read -P 42 0 64k' \ 85 | _filter_qemu_io 86 87# Derive cache sizes from combined size (with a reasonable ratio, but we cannot 88# test that) 89$QEMU_IO -c "open -o cache-size=2M $TEST_IMG" -c 'read -P 42 0 64k' \ 90 | _filter_qemu_io 91# Fix one cache, derive the other 92$QEMU_IO -c "open -o cache-size=2M,l2-cache-size=1M $TEST_IMG" \ 93 -c 'read -P 42 0 64k' \ 94 | _filter_qemu_io 95$QEMU_IO -c "open -o cache-size=2M,refcount-cache-size=1M $TEST_IMG" \ 96 -c 'read -P 42 0 64k' \ 97 | _filter_qemu_io 98# Directly set both caches 99$QEMU_IO -c "open -o l2-cache-size=1M,refcount-cache-size=0.25M $TEST_IMG" \ 100 -c 'read -P 42 0 64k' \ 101 | _filter_qemu_io 102 103# Valid cache entry sizes 104$QEMU_IO -c "open -o l2-cache-entry-size=512 $TEST_IMG" \ 105 2>&1 | _filter_testdir | _filter_imgfmt 106$QEMU_IO -c "open -o l2-cache-entry-size=16k $TEST_IMG" \ 107 2>&1 | _filter_testdir | _filter_imgfmt 108$QEMU_IO -c "open -o l2-cache-entry-size=64k $TEST_IMG" \ 109 2>&1 | _filter_testdir | _filter_imgfmt 110 111 112echo 113echo '=== Testing minimal L2 cache and COW ===' 114echo 115 116$QEMU_IMG snapshot -c foo "$TEST_IMG" 117# This requires a COW operation, which accesses two L2 tables simultaneously 118# (COW source and destination), so there must be enough space in the cache to 119# place both tables there (and qemu should not crash) 120$QEMU_IO -c "open -o cache-size=0 $TEST_IMG" -c 'write 0 64k' | _filter_qemu_io 121 122# success, all done 123echo '*** done' 124rm -f $seq.full 125status=0 126