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 $seq" 26 27here=`pwd` 28status=1 # failure is the default! 29 30_cleanup() 31{ 32 _cleanup_test_img 33} 34trap "_cleanup; exit \$status" 0 1 2 3 15 35 36# get standard environment, filters and checks 37. ./common.rc 38. ./common.filter 39 40_supported_fmt qcow qcow2 vmdk qed 41_supported_proto file 42_supported_os Linux 43_unsupported_imgopts "subformat=monolithicFlat" \ 44 "subformat=twoGbMaxExtentFlat" \ 45 "subformat=twoGbMaxExtentSparse" 46 47CLUSTER_SIZE=4k 48size=128M 49 50echo 51echo "== creating backing file for COW tests ==" 52 53TEST_IMG_SAVE="$TEST_IMG" 54TEST_IMG="$TEST_IMG.base" 55 56_make_test_img $size 57 58function backing_io() 59{ 60 local offset=$1 61 local sectors=$2 62 local op=$3 63 local pattern=0 64 local cur_sec=0 65 66 for i in $(seq 0 $((sectors - 1))); do 67 cur_sec=$((offset / 512 + i)) 68 pattern=$(( ( (cur_sec % 256) + (cur_sec / 256)) % 256 )) 69 70 echo "$op -P $pattern $((cur_sec * 512)) 512" 71 done 72} 73 74backing_io 0 256 write | $QEMU_IO "$TEST_IMG" | _filter_qemu_io 75 76TEST_IMG="$TEST_IMG_SAVE" 77 78_make_test_img -b "$TEST_IMG.base" 6G 79 80echo 81echo "== COW in a single cluster ==" 82$QEMU_IO -c "write -P 0x77 0 2k" "$TEST_IMG" | _filter_qemu_io 83$QEMU_IO -c "write -P 0x88 6k 2k" "$TEST_IMG" | _filter_qemu_io 84$QEMU_IO -c "write -P 0x99 9k 2k" "$TEST_IMG" | _filter_qemu_io 85 86$QEMU_IO -c "read -P 0x77 0 2k" "$TEST_IMG" | _filter_qemu_io 87backing_io $((2 * 1024)) 8 read | $QEMU_IO "$TEST_IMG" | _filter_qemu_io 88$QEMU_IO -c "read -P 0x88 6k 2k" "$TEST_IMG" | _filter_qemu_io 89backing_io $((8 * 1024)) 2 read | $QEMU_IO "$TEST_IMG" | _filter_qemu_io 90$QEMU_IO -c "read -P 0x99 9k 2k" "$TEST_IMG" | _filter_qemu_io 91backing_io $((11 * 1024)) 2 read | $QEMU_IO "$TEST_IMG" | _filter_qemu_io 92 93echo 94echo "== COW in two-cluster allocations ==" 95$QEMU_IO -c "write -P 0x77 16k 6k" "$TEST_IMG" | _filter_qemu_io 96$QEMU_IO -c "write -P 0x88 26k 6k" "$TEST_IMG" | _filter_qemu_io 97$QEMU_IO -c "write -P 0x99 33k 5k" "$TEST_IMG" | _filter_qemu_io 98 99$QEMU_IO -c "read -P 0x77 16k 6k" "$TEST_IMG" | _filter_qemu_io 100backing_io $((22 * 1024)) 8 read | $QEMU_IO "$TEST_IMG" | _filter_qemu_io 101$QEMU_IO -c "read -P 0x88 26k 6k" "$TEST_IMG" | _filter_qemu_io 102backing_io $((32 * 1024)) 2 read | $QEMU_IO "$TEST_IMG" | _filter_qemu_io 103$QEMU_IO -c "read -P 0x99 33k 5k" "$TEST_IMG" | _filter_qemu_io 104backing_io $((38 * 1024)) 4 read | $QEMU_IO "$TEST_IMG" | _filter_qemu_io 105 106echo 107echo "== COW in multi-cluster allocations ==" 108$QEMU_IO -c "write -P 0x77 48k 15k" "$TEST_IMG" | _filter_qemu_io 109$QEMU_IO -c "write -P 0x88 66k 14k" "$TEST_IMG" | _filter_qemu_io 110$QEMU_IO -c "write -P 0x99 83k 15k" "$TEST_IMG" | _filter_qemu_io 111 112$QEMU_IO -c "read -P 0x77 48k 15k" "$TEST_IMG" | _filter_qemu_io 113backing_io $((63 * 1024)) 6 read | $QEMU_IO "$TEST_IMG" | _filter_qemu_io 114$QEMU_IO -c "read -P 0x88 66k 14k" "$TEST_IMG" | _filter_qemu_io 115backing_io $((80 * 1024)) 6 read | $QEMU_IO "$TEST_IMG" | _filter_qemu_io 116$QEMU_IO -c "read -P 0x99 83k 15k" "$TEST_IMG" | _filter_qemu_io 117backing_io $((98 * 1024)) 4 read | $QEMU_IO "$TEST_IMG" | _filter_qemu_io 118 119_check_test_img 120 121# success, all done 122echo "*** done" 123rm -f $seq.full 124status=0 125