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Diffstat (limited to 'qemu/tests/qemu-iotests/028')
-rwxr-xr-x | qemu/tests/qemu-iotests/028 | 135 |
1 files changed, 135 insertions, 0 deletions
diff --git a/qemu/tests/qemu-iotests/028 b/qemu/tests/qemu-iotests/028 new file mode 100755 index 000000000..a1f4423d4 --- /dev/null +++ b/qemu/tests/qemu-iotests/028 @@ -0,0 +1,135 @@ +#!/bin/bash +# +# Test that backing files can be smaller than the image +# +# Copyright (C) 2010 IBM, Corp. +# +# Based on 017: +# Copyright (C) 2009 Red Hat, Inc. +# +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 2 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program. If not, see <http://www.gnu.org/licenses/>. +# + +# creator +owner=stefanha@linux.vnet.ibm.com + +seq=`basename $0` +echo "QA output created by $seq" + +here=`pwd` +tmp=/tmp/$$ +status=1 # failure is the default! + +_cleanup() +{ + rm -f "${TEST_IMG}.copy" + _cleanup_test_img +} +trap "_cleanup; exit \$status" 0 1 2 3 15 + +# get standard environment, filters and checks +. ./common.rc +. ./common.filter +. ./common.pattern +. ./common.qemu + +# Any format supporting backing files except vmdk and qcow which do not support +# smaller backing files. +_supported_fmt qcow2 qed +_supported_proto file +_supported_os Linux + +# Choose a size that is not necessarily a cluster size multiple for image +# formats that use clusters. This will ensure that the base image doesn't end +# precisely on a cluster boundary (the easy case). +image_size=$(( 4 * 1024 * 1024 * 1024 + 3 * 512 )) + +# The base image is smaller than the image file +base_size=$(( image_size - 1024 * 1024 * 1024 )) + +offset=$(( base_size - 32 * 1024 )) + +_make_test_img $base_size + +echo "Filling base image" +echo + +# Fill end of base image with a pattern, skipping every other sector +io writev $offset 512 1024 32 + +_check_test_img + +echo "Creating test image with backing file" +echo + +mv "$TEST_IMG" "$TEST_IMG.base" +_make_test_img -b "$TEST_IMG.base" $image_size + +echo "Filling test image" +echo + +# Write every other sector around where the base image ends +io writev $(( offset + 512 )) 512 1024 64 + +_check_test_img + +echo "Reading" +echo + +# Base image sectors +io readv $(( offset )) 512 1024 32 + +# Image sectors +io readv $(( offset + 512 )) 512 1024 64 + +# Zero sectors beyond end of base image +io_zero readv $(( offset + 32 * 1024 )) 512 1024 32 + +_check_test_img + +# Rebase it on top of its base image +$QEMU_IMG rebase -b "$TEST_IMG.base" "$TEST_IMG" + +echo +echo block-backup +echo + +qemu_comm_method="monitor" +_launch_qemu -drive file="${TEST_IMG}",cache=${CACHEMODE},id=disk +h=$QEMU_HANDLE +QEMU_COMM_TIMEOUT=1 + +# Silence output since it contains the disk image path and QEMU's readline +# character echoing makes it very hard to filter the output +_send_qemu_cmd $h "drive_backup disk ${TEST_IMG}.copy" "(qemu)" >/dev/null +_send_qemu_cmd $h "" "Formatting" | _filter_img_create +qemu_cmd_repeat=20 _send_qemu_cmd $h "info block-jobs" "No active jobs" +_send_qemu_cmd $h 'quit' "" + +# Base image sectors +TEST_IMG="${TEST_IMG}.copy" io readv $(( offset )) 512 1024 32 + +# Image sectors +TEST_IMG="${TEST_IMG}.copy" io readv $(( offset + 512 )) 512 1024 64 + +# Zero sectors beyond end of base image +TEST_IMG="${TEST_IMG}.copy" io_zero readv $(( offset + 32 * 1024 )) 512 1024 32 + + +_check_test_img + +# success, all done +echo "*** done" +rm -f $seq.full +status=0 |