1#!/bin/bash 2# 3# Test that backing files can be smaller than the image 4# 5# Copyright (C) 2010 IBM, Corp. 6# 7# Based on 017: 8# Copyright (C) 2009 Red Hat, Inc. 9# 10# This program is free software; you can redistribute it and/or modify 11# it under the terms of the GNU General Public License as published by 12# the Free Software Foundation; either version 2 of the License, or 13# (at your option) any later version. 14# 15# This program is distributed in the hope that it will be useful, 16# but WITHOUT ANY WARRANTY; without even the implied warranty of 17# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18# GNU General Public License for more details. 19# 20# You should have received a copy of the GNU General Public License 21# along with this program. If not, see <http://www.gnu.org/licenses/>. 22# 23 24# creator 25owner=stefanha@linux.vnet.ibm.com 26 27seq=`basename $0` 28echo "QA output created by $seq" 29 30here=`pwd` 31status=1 # failure is the default! 32 33_cleanup() 34{ 35 _cleanup_qemu 36 rm -f "${TEST_IMG}.copy" 37 _cleanup_test_img 38} 39trap "_cleanup; exit \$status" 0 1 2 3 15 40 41# get standard environment, filters and checks 42. ./common.rc 43. ./common.filter 44. ./common.pattern 45. ./common.qemu 46 47# Any format supporting backing files except vmdk and qcow which do not support 48# smaller backing files. 49_supported_fmt qcow2 qed 50_supported_proto file 51_supported_os Linux 52 53# Choose a size that is not necessarily a cluster size multiple for image 54# formats that use clusters. This will ensure that the base image doesn't end 55# precisely on a cluster boundary (the easy case). 56image_size=$(( 4 * 1024 * 1024 * 1024 + 3 * 512 )) 57 58# The base image is smaller than the image file 59base_size=$(( image_size - 1024 * 1024 * 1024 )) 60 61offset=$(( base_size - 32 * 1024 )) 62 63TEST_IMG_SAVE="$TEST_IMG" 64TEST_IMG="$TEST_IMG.base" 65 66_make_test_img $base_size 67 68echo "Filling base image" 69echo 70 71# Fill end of base image with a pattern, skipping every other sector 72io writev $offset 512 1024 32 73 74_check_test_img 75 76echo "Creating test image with backing file" 77echo 78 79TEST_IMG="$TEST_IMG_SAVE" 80_make_test_img -b "$TEST_IMG.base" $image_size 81 82echo "Filling test image" 83echo 84 85# Write every other sector around where the base image ends 86io writev $(( offset + 512 )) 512 1024 64 87 88_check_test_img 89 90echo "Reading" 91echo 92 93# Base image sectors 94io readv $(( offset )) 512 1024 32 95 96# Image sectors 97io readv $(( offset + 512 )) 512 1024 64 98 99# Zero sectors beyond end of base image 100io_zero readv $(( offset + 32 * 1024 )) 512 1024 32 101 102_check_test_img 103 104# Rebase it on top of its base image 105$QEMU_IMG rebase -b "$TEST_IMG.base" "$TEST_IMG" 106 107echo 108echo block-backup 109echo 110 111qemu_comm_method="monitor" 112_launch_qemu -drive file="${TEST_IMG}",cache=${CACHEMODE},id=disk 113h=$QEMU_HANDLE 114QEMU_COMM_TIMEOUT=1 115 116# Silence output since it contains the disk image path and QEMU's readline 117# character echoing makes it very hard to filter the output. Plus, there 118# is no telling how many times the command will repeat before succeeding. 119_send_qemu_cmd $h "drive_backup disk ${TEST_IMG}.copy" "(qemu)" >/dev/null 120_send_qemu_cmd $h "" "Formatting" | _filter_img_create 121qemu_cmd_repeat=20 _send_qemu_cmd $h "info block-jobs" "No active jobs" >/dev/null 122_send_qemu_cmd $h "info block-jobs" "No active jobs" 123_send_qemu_cmd $h 'quit' "" 124 125# Base image sectors 126TEST_IMG="${TEST_IMG}.copy" io readv $(( offset )) 512 1024 32 127 128# Image sectors 129TEST_IMG="${TEST_IMG}.copy" io readv $(( offset + 512 )) 512 1024 64 130 131# Zero sectors beyond end of base image 132TEST_IMG="${TEST_IMG}.copy" io_zero readv $(( offset + 32 * 1024 )) 512 1024 32 133 134 135_check_test_img 136 137# success, all done 138echo "*** done" 139rm -f $seq.full 140status=0 141