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