iotests: Add preallocated resize test for raw

#!/bin/bash

#

# Test preallocated resize of raw images

#

# Copyright (C) 2017 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

}

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

# get standard environment and filters

. ./common.rc

. ./common.filter

_supported_fmt raw

_supported_proto file

_supported_os Linux

# in kB

CREATION_SIZE=128

GROWTH_SIZE=256

echo '=== Testing image growth ==='

for create_mode in off falloc full; do

    for growth_mode in off falloc full; do

        echo

        echo "--- create_mode=$create_mode growth_mode=$growth_mode ---"

        IMGOPTS="preallocation=$create_mode" _make_test_img ${CREATION_SIZE}K

        $QEMU_IMG resize -f "$IMGFMT" --preallocation=$growth_mode "$TEST_IMG" +${GROWTH_SIZE}K

        expected_size=0

        if [ $create_mode != off ]; then

            expected_size=$CREATION_SIZE

        fi

        if [ $growth_mode != off ]; then

            expected_size=$((expected_size + $GROWTH_SIZE))

        fi

        actual_size=$($QEMU_IMG info -f "$IMGFMT" "$TEST_IMG" | grep 'disk size')

        actual_size=$(echo "$actual_size" | sed -e 's/^[^0-9]*\([0-9]\+\).*$/\1/')

        # The actual size may exceed the expected size, depending on the file

        # system. Therefore we just test that the actual size is at least what

        # we expect.

        if [ $actual_size -lt $expected_size ]; then

            echo "ERROR: Image should have at least ${expected_size}K, but has ${actual_size}K"

        fi

    done

done

echo

echo '=== Testing image shrinking ==='

# None of this should work except for "off", because other modes cannot be used

# for shrinking

for growth_mode in falloc full off; do

    echo

    echo "--- growth_mode=$growth_mode ---"

    $QEMU_IMG resize -f "$IMGFMT" --preallocation=$growth_mode "$TEST_IMG" -${GROWTH_SIZE}K

done

# success, all done

echo '*** done'

rm -f $seq.full

status=0

QA output created by 106

=== Testing image growth ===

--- create_mode=off growth_mode=off ---

Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=131072 preallocation=off

Image resized.

--- create_mode=off growth_mode=falloc ---

Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=131072 preallocation=off

Image resized.

--- create_mode=off growth_mode=full ---

Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=131072 preallocation=off

Image resized.

--- create_mode=falloc growth_mode=off ---

Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=131072 preallocation=falloc

Image resized.

--- create_mode=falloc growth_mode=falloc ---

Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=131072 preallocation=falloc

Image resized.

--- create_mode=falloc growth_mode=full ---

Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=131072 preallocation=falloc

Image resized.

--- create_mode=full growth_mode=off ---

Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=131072 preallocation=full

Image resized.

--- create_mode=full growth_mode=falloc ---

Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=131072 preallocation=full

Image resized.

--- create_mode=full growth_mode=full ---

Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=131072 preallocation=full

Image resized.

=== Testing image shrinking ===

--- growth_mode=falloc ---

qemu-img: Preallocation can only be used for growing images

--- growth_mode=full ---

qemu-img: Preallocation can only be used for growing images

--- growth_mode=off ---

Image resized.

*** done

103 rw auto quick

104 rw auto

105 rw auto quick

106 rw auto quick

107 rw auto quick

108 rw auto quick

109 rw auto