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#!/bin/bash
#
# When using a backing file for the output image in qemu-img convert,
# the backing file clusters must not copied. The data must still be
# read correctly.
#
# 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=kwolf@redhat.com
seq=`basename $0`
echo "QA output created by $seq"
here=`pwd`
tmp=/tmp/$$
status=1 # failure is the default!
_cleanup()
{
_cleanup_test_img
rm -f $TEST_IMG.base
rm -f $TEST_IMG.orig
}
trap "_cleanup; exit \$status" 0 1 2 3 15
# get standard environment, filters and checks
. ./common.rc
. ./common.filter
. ./common.pattern
# Any format supporting backing files
_supported_fmt qcow qcow2 vmdk
_supported_os Linux
TEST_OFFSETS="0 4294967296"
CLUSTER_SIZE=65536
_make_test_img 6G
echo "Filling base image"
echo
for offset in $TEST_OFFSETS; do
# Some clusters with alternating backing file/image file reads
io_pattern writev $(( offset )) 512 1024 64 42
# Complete backing clusters
io_pattern writev $(( offset + 1024 * 1024)) $CLUSTER_SIZE $CLUSTER_SIZE 1 42
done
_check_test_img
echo "Creating test image with backing file"
echo
mv $TEST_IMG $TEST_IMG.base
_make_test_img -b $TEST_IMG.base 6G
echo "Filling test image"
echo
for offset in $TEST_OFFSETS; do
# Some clusters with alternating backing file/image file reads
io_pattern writev $(( offset + 512 )) 512 1024 64 43
# Complete test image clusters
io_pattern writev $(( offset + 1024 * 1024 + $CLUSTER_SIZE)) $CLUSTER_SIZE $CLUSTER_SIZE 1 43
done
_check_test_img
mv $TEST_IMG $TEST_IMG.orig
# Test the conversion twice: One test with the old-style -B option and another
# one with -o backing_file
for backing_option in "-B $TEST_IMG.base" "-o backing_file=$TEST_IMG.base"; do
echo
echo Testing conversion with $backing_option
echo
$QEMU_IMG convert -O $IMGFMT $backing_option $TEST_IMG.orig $TEST_IMG
echo "Checking if backing clusters are allocated when they shouldn't"
echo
for offset in $TEST_OFFSETS; do
# Complete backing clusters
is_allocated $(( offset + 1024 * 1024)) $CLUSTER_SIZE $CLUSTER_SIZE 1
done
echo "Reading"
echo
for offset in $TEST_OFFSETS; do
# Some clusters with alternating backing file/image file reads
io_pattern readv $(( offset )) 512 1024 64 42
io_pattern readv $(( offset + 512 )) 512 1024 64 43
# Complete test image clusters
io_pattern readv $(( offset + 1024 * 1024)) $CLUSTER_SIZE $CLUSTER_SIZE 1 42
io_pattern readv $(( offset + 1024 * 1024 + $CLUSTER_SIZE)) $CLUSTER_SIZE $CLUSTER_SIZE 1 43
# Empty sectors
io_zero readv $(( offset + 1024 * 1024 + $CLUSTER_SIZE * 4 )) $CLUSTER_SIZE $CLUSTER_SIZE 1
done
_check_test_img
done
# success, all done
echo "*** done"
rm -f $seq.full
status=0
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