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 file 43_supported_os Linux 44_unsupported_imgopts "subformat=monolithicFlat" \ 45 "subformat=twoGbMaxExtentFlat" \ 46 "subformat=twoGbMaxExtentSparse" 47 48CLUSTER_SIZE=4k 49size=128M 50 51echo 52echo "== creating backing file for COW tests ==" 53 54TEST_IMG_SAVE="$TEST_IMG" 55TEST_IMG="$TEST_IMG.base" 56 57_make_test_img $size 58 59function backing_io() 60{ 61 local offset=$1 62 local sectors=$2 63 local op=$3 64 local pattern=0 65 local cur_sec=0 66 67 for i in $(seq 0 $((sectors - 1))); do 68 cur_sec=$((offset / 512 + i)) 69 pattern=$(( ( (cur_sec % 256) + (cur_sec / 256)) % 256 )) 70 71 echo "$op -P $pattern $((cur_sec * 512)) 512" 72 done 73} 74 75backing_io 0 256 write | $QEMU_IO "$TEST_IMG" | _filter_qemu_io 76 77TEST_IMG="$TEST_IMG_SAVE" 78 79_make_test_img -b "$TEST_IMG.base" 6G 80 81echo 82echo "== COW in a single cluster ==" 83$QEMU_IO -c "write -P 0x77 0 2k" "$TEST_IMG" | _filter_qemu_io 84$QEMU_IO -c "write -P 0x88 6k 2k" "$TEST_IMG" | _filter_qemu_io 85$QEMU_IO -c "write -P 0x99 9k 2k" "$TEST_IMG" | _filter_qemu_io 86 87$QEMU_IO -c "read -P 0x77 0 2k" "$TEST_IMG" | _filter_qemu_io 88backing_io $((2 * 1024)) 8 read | $QEMU_IO "$TEST_IMG" | _filter_qemu_io 89$QEMU_IO -c "read -P 0x88 6k 2k" "$TEST_IMG" | _filter_qemu_io 90backing_io $((8 * 1024)) 2 read | $QEMU_IO "$TEST_IMG" | _filter_qemu_io 91$QEMU_IO -c "read -P 0x99 9k 2k" "$TEST_IMG" | _filter_qemu_io 92backing_io $((11 * 1024)) 2 read | $QEMU_IO "$TEST_IMG" | _filter_qemu_io 93 94echo 95echo "== COW in two-cluster allocations ==" 96$QEMU_IO -c "write -P 0x77 16k 6k" "$TEST_IMG" | _filter_qemu_io 97$QEMU_IO -c "write -P 0x88 26k 6k" "$TEST_IMG" | _filter_qemu_io 98$QEMU_IO -c "write -P 0x99 33k 5k" "$TEST_IMG" | _filter_qemu_io 99 100$QEMU_IO -c "read -P 0x77 16k 6k" "$TEST_IMG" | _filter_qemu_io 101backing_io $((22 * 1024)) 8 read | $QEMU_IO "$TEST_IMG" | _filter_qemu_io 102$QEMU_IO -c "read -P 0x88 26k 6k" "$TEST_IMG" | _filter_qemu_io 103backing_io $((32 * 1024)) 2 read | $QEMU_IO "$TEST_IMG" | _filter_qemu_io 104$QEMU_IO -c "read -P 0x99 33k 5k" "$TEST_IMG" | _filter_qemu_io 105backing_io $((38 * 1024)) 4 read | $QEMU_IO "$TEST_IMG" | _filter_qemu_io 106 107echo 108echo "== COW in multi-cluster allocations ==" 109$QEMU_IO -c "write -P 0x77 48k 15k" "$TEST_IMG" | _filter_qemu_io 110$QEMU_IO -c "write -P 0x88 66k 14k" "$TEST_IMG" | _filter_qemu_io 111$QEMU_IO -c "write -P 0x99 83k 15k" "$TEST_IMG" | _filter_qemu_io 112 113$QEMU_IO -c "read -P 0x77 48k 15k" "$TEST_IMG" | _filter_qemu_io 114backing_io $((63 * 1024)) 6 read | $QEMU_IO "$TEST_IMG" | _filter_qemu_io 115$QEMU_IO -c "read -P 0x88 66k 14k" "$TEST_IMG" | _filter_qemu_io 116backing_io $((80 * 1024)) 6 read | $QEMU_IO "$TEST_IMG" | _filter_qemu_io 117$QEMU_IO -c "read -P 0x99 83k 15k" "$TEST_IMG" | _filter_qemu_io 118backing_io $((98 * 1024)) 4 read | $QEMU_IO "$TEST_IMG" | _filter_qemu_io 119 120_check_test_img 121 122# success, all done 123echo "*** done" 124rm -f $seq.full 125status=0 126