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 fuse 41# Internal snapshots are (currently) impossible with refcount_bits=1, 42# and generally impossible with external data files 43_unsupported_imgopts 'refcount_bits=1[^0-9]' data_file 44 45IMG_SIZE=64K 46 47_make_test_img $IMG_SIZE 48$QEMU_IO -c 'write -P 42 0 64k' "$TEST_IMG" | _filter_qemu_io 49 50echo 51echo '=== Testing invalid option combinations ===' 52echo 53 54# all sizes set at the same time 55$QEMU_IO -c "open -o cache-size=1.25M,l2-cache-size=1M,refcount-cache-size=0.25M $TEST_IMG" \ 56 2>&1 | _filter_testdir | _filter_imgfmt 57# l2-cache-size may not exceed cache-size 58$QEMU_IO -c "open -o cache-size=1M,l2-cache-size=2M $TEST_IMG" 2>&1 \ 59 | _filter_testdir | _filter_imgfmt 60# refcount-cache-size may not exceed cache-size 61$QEMU_IO -c "open -o cache-size=1M,refcount-cache-size=2M $TEST_IMG" 2>&1 \ 62 | _filter_testdir | _filter_imgfmt 63# 0 should be a valid size (e.g. for enforcing the minimum), so this should not 64# work 65$QEMU_IO -c "open -o cache-size=0,l2-cache-size=0,refcount-cache-size=0 $TEST_IMG" \ 66 2>&1 | _filter_testdir | _filter_imgfmt 67 68# Invalid cache entry sizes 69$QEMU_IO -c "open -o l2-cache-entry-size=256 $TEST_IMG" \ 70 2>&1 | _filter_testdir | _filter_imgfmt 71$QEMU_IO -c "open -o l2-cache-entry-size=4242 $TEST_IMG" \ 72 2>&1 | _filter_testdir | _filter_imgfmt 73$QEMU_IO -c "open -o l2-cache-entry-size=128k $TEST_IMG" \ 74 2>&1 | _filter_testdir | _filter_imgfmt 75 76echo 77echo '=== Testing valid option combinations ===' 78echo 79 80# There should be a reasonable and working minimum 81$QEMU_IO -c "open -o cache-size=0 $TEST_IMG" -c 'read -P 42 0 64k' \ 82 | _filter_qemu_io 83$QEMU_IO -c "open -o l2-cache-size=0 $TEST_IMG" -c 'read -P 42 0 64k' \ 84 | _filter_qemu_io 85$QEMU_IO -c "open -o refcount-cache-size=0 $TEST_IMG" -c 'read -P 42 0 64k' \ 86 | _filter_qemu_io 87 88# Derive cache sizes from combined size (with a reasonable ratio, but we cannot 89# test that) 90$QEMU_IO -c "open -o cache-size=2M $TEST_IMG" -c 'read -P 42 0 64k' \ 91 | _filter_qemu_io 92# Fix one cache, derive the other 93$QEMU_IO -c "open -o cache-size=2M,l2-cache-size=1M $TEST_IMG" \ 94 -c 'read -P 42 0 64k' \ 95 | _filter_qemu_io 96$QEMU_IO -c "open -o cache-size=2M,refcount-cache-size=1M $TEST_IMG" \ 97 -c 'read -P 42 0 64k' \ 98 | _filter_qemu_io 99# Directly set both caches 100$QEMU_IO -c "open -o l2-cache-size=1M,refcount-cache-size=0.25M $TEST_IMG" \ 101 -c 'read -P 42 0 64k' \ 102 | _filter_qemu_io 103 104# Valid cache entry sizes 105$QEMU_IO -c "open -o l2-cache-entry-size=512 $TEST_IMG" \ 106 2>&1 | _filter_testdir | _filter_imgfmt 107$QEMU_IO -c "open -o l2-cache-entry-size=16k $TEST_IMG" \ 108 2>&1 | _filter_testdir | _filter_imgfmt 109$QEMU_IO -c "open -o l2-cache-entry-size=64k $TEST_IMG" \ 110 2>&1 | _filter_testdir | _filter_imgfmt 111 112 113echo 114echo '=== Testing minimal L2 cache and COW ===' 115echo 116 117$QEMU_IMG snapshot -c foo "$TEST_IMG" 118# This requires a COW operation, which accesses two L2 tables simultaneously 119# (COW source and destination), so there must be enough space in the cache to 120# place both tables there (and qemu should not crash) 121$QEMU_IO -c "open -o cache-size=0 $TEST_IMG" -c 'write 0 64k' | _filter_qemu_io 122 123# success, all done 124echo '*** done' 125rm -f $seq.full 126status=0 127