Archipelago » qemu

#!/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 qed

_supported_proto file

_supported_os Linux

_unsupported_imgopts "subformat=monolithicFlat" \

                     "subformat=twoGbMaxExtentFlat" \

                     "subformat=twoGbMaxExtentSparse"

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 " "-o backing_file="; do

    echo

    echo Testing conversion with $backing_option$TEST_IMG.base | _filter_testdir | _filter_imgfmt

    echo

    $QEMU_IMG convert -O $IMGFMT $backing_option"$TEST_IMG.base" "$TEST_IMG.orig" "$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