1#!/bin/bash 2# 3# Test COW from backing files 4# 5# Copyright (C) 2012 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=kwolf@redhat.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 qcow qcow2 vmdk qed 42_supported_proto generic 43_supported_os Linux 44 45CLUSTER_SIZE=4k 46size=128M 47 48echo 49echo "== creating backing file for COW tests ==" 50 51_make_test_img $size 52 53function backing_io() 54{ 55 local offset=$1 56 local sectors=$2 57 local op=$3 58 local pattern=0 59 local cur_sec=0 60 61 for i in $(seq 0 $((sectors - 1))); do 62 cur_sec=$((offset / 512 + i)) 63 pattern=$(( ( (cur_sec % 256) + (cur_sec / 256)) % 256 )) 64 65 echo "$op -P $pattern $((cur_sec * 512)) 512" 66 done 67} 68 69backing_io 0 256 write | $QEMU_IO $TEST_IMG | _filter_qemu_io 70 71mv $TEST_IMG $TEST_IMG.base 72 73_make_test_img -b $TEST_IMG.base 6G 74 75echo 76echo "== COW in a single cluster ==" 77$QEMU_IO -c "write -P 0x77 0 2k" $TEST_IMG | _filter_qemu_io 78$QEMU_IO -c "write -P 0x88 6k 2k" $TEST_IMG | _filter_qemu_io 79$QEMU_IO -c "write -P 0x99 9k 2k" $TEST_IMG | _filter_qemu_io 80 81$QEMU_IO -c "read -P 0x77 0 2k" $TEST_IMG | _filter_qemu_io 82backing_io $((2 * 1024)) 8 read | $QEMU_IO $TEST_IMG | _filter_qemu_io 83$QEMU_IO -c "read -P 0x88 6k 2k" $TEST_IMG | _filter_qemu_io 84backing_io $((8 * 1024)) 2 read | $QEMU_IO $TEST_IMG | _filter_qemu_io 85$QEMU_IO -c "read -P 0x99 9k 2k" $TEST_IMG | _filter_qemu_io 86backing_io $((11 * 1024)) 2 read | $QEMU_IO $TEST_IMG | _filter_qemu_io 87 88echo 89echo "== COW in two-cluster allocations ==" 90$QEMU_IO -c "write -P 0x77 16k 6k" $TEST_IMG | _filter_qemu_io 91$QEMU_IO -c "write -P 0x88 26k 6k" $TEST_IMG | _filter_qemu_io 92$QEMU_IO -c "write -P 0x99 33k 5k" $TEST_IMG | _filter_qemu_io 93 94$QEMU_IO -c "read -P 0x77 16k 6k" $TEST_IMG | _filter_qemu_io 95backing_io $((22 * 1024)) 8 read | $QEMU_IO $TEST_IMG | _filter_qemu_io 96$QEMU_IO -c "read -P 0x88 26k 6k" $TEST_IMG | _filter_qemu_io 97backing_io $((32 * 1024)) 2 read | $QEMU_IO $TEST_IMG | _filter_qemu_io 98$QEMU_IO -c "read -P 0x99 33k 5k" $TEST_IMG | _filter_qemu_io 99backing_io $((38 * 1024)) 4 read | $QEMU_IO $TEST_IMG | _filter_qemu_io 100 101echo 102echo "== COW in multi-cluster allocations ==" 103$QEMU_IO -c "write -P 0x77 48k 15k" $TEST_IMG | _filter_qemu_io 104$QEMU_IO -c "write -P 0x88 66k 14k" $TEST_IMG | _filter_qemu_io 105$QEMU_IO -c "write -P 0x99 83k 15k" $TEST_IMG | _filter_qemu_io 106 107$QEMU_IO -c "read -P 0x77 48k 15k" $TEST_IMG | _filter_qemu_io 108backing_io $((63 * 1024)) 6 read | $QEMU_IO $TEST_IMG | _filter_qemu_io 109$QEMU_IO -c "read -P 0x88 66k 14k" $TEST_IMG | _filter_qemu_io 110backing_io $((80 * 1024)) 6 read | $QEMU_IO $TEST_IMG | _filter_qemu_io 111$QEMU_IO -c "read -P 0x99 83k 15k" $TEST_IMG | _filter_qemu_io 112backing_io $((98 * 1024)) 4 read | $QEMU_IO $TEST_IMG | _filter_qemu_io 113 114_check_test_img 115 116# success, all done 117echo "*** done" 118rm -f $seq.full 119status=0 120