iotests: Add VMDK backing file correlation test

#!/bin/bash

#

# Test vmdk backing file correlation

#

# Copyright (C) 2018 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=mreitz@redhat.com

seq=$(basename $0)

echo "QA output created by $seq"

here=$PWD

status=1	# failure is the default!

_cleanup()

{

    _cleanup_test_img

    rm -f "$TEST_IMG.not_base"

}

trap "_cleanup; exit \$status" 0 1 2 3 15

# get standard environment, filters and checks

. ./common.rc

. ./common.filter

. ./common.qemu

# This tests vmdk-specific low-level functionality

_supported_fmt vmdk

_supported_proto file

_supported_os Linux

_unsupported_imgopts "subformat=monolithicFlat" \

                     "subformat=twoGbMaxExtentFlat" \

                     "subformat=twoGbMaxExtentSparse"

TEST_IMG="$TEST_IMG.base" _make_test_img 1M

TEST_IMG="$TEST_IMG.not_base" _make_test_img 1M

_make_test_img -b "$TEST_IMG.base"

make_opts()

{

    node_name=$1

    filename=$2

    backing=$3

    if [ -z "$backing" ]; then

        backing="null"

    else

        backing="'$backing'"

    fi

    echo "{ 'node-name': '$node_name',

            'driver': 'vmdk',

            'file': {

                'driver': 'file',

                'filename': '$filename'

            },

            'backing': $backing }"

}

overlay_opts=$(make_opts overlay "$TEST_IMG" backing)

base_opts=$(make_opts backing "$TEST_IMG.base")

not_base_opts=$(make_opts backing "$TEST_IMG.not_base")

not_vmdk_opts="{ 'node-name': 'backing', 'driver': 'null-co' }"

echo

echo '=== Testing fitting VMDK backing image ==='

echo

qemu_comm_method=monitor \

    _launch_qemu -blockdev "$base_opts" -blockdev "$overlay_opts"

# Should not return an error

_send_qemu_cmd $QEMU_HANDLE 'qemu-io overlay "read 0 512"' 'ops'

_cleanup_qemu

echo

echo '=== Testing unrelated VMDK backing image ==='

echo

qemu_comm_method=monitor \

    _launch_qemu -blockdev "$not_base_opts" -blockdev "$overlay_opts"

# Should fail (gracefully)

_send_qemu_cmd $QEMU_HANDLE 'qemu-io overlay "read 0 512"' 'failed'

_cleanup_qemu

echo

echo '=== Testing non-VMDK backing image ==='

echo

# FIXME: This is the reason why we have to use two -blockdev

# invocations.  You can only fully override the backing file options

# if you either specify a node reference (as done here) or the new

# options contain file.filename (which in this case they do not).

# In other cases, file.filename will be set to whatever the image

# header of the overlay contains (which we do not want).  I consider

# this a FIXME because with -blockdev, you cannot specify "partial"

# options, so setting file.filename but leaving the rest as specified

# by the user does not make sense.

qemu_comm_method=monitor \

    _launch_qemu -blockdev "$not_vmdk_opts" -blockdev "$overlay_opts"

# Should fail (gracefully)

_send_qemu_cmd $QEMU_HANDLE 'qemu-io overlay "read 0 512"' 'failed'

_cleanup_qemu

# success, all done

echo "*** done"

rm -f $seq.full

status=0

QA output created by 225

Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=1048576

Formatting 'TEST_DIR/t.IMGFMT.not_base', fmt=IMGFMT size=1048576

Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1048576 backing_file=TEST_DIR/t.IMGFMT.base

=== Testing fitting VMDK backing image ===

QEMU X.Y.Z monitor - type 'help' for more information

(qemu) qemu-io overlay "read 0 512"

read 512/512 bytes at offset 0

512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)

=== Testing unrelated VMDK backing image ===

QEMU X.Y.Z monitor - type 'help' for more information

(qemu) qemu-io overlay "read 0 512"

read failed: Invalid argument

=== Testing non-VMDK backing image ===

QEMU X.Y.Z monitor - type 'help' for more information

(qemu) qemu-io overlay "read 0 512"

read failed: Invalid argument

*** done

221 rw auto quick

222 rw auto quick

223 rw auto quick

225 rw auto quick