#!/usr/bin/env bash
#
# qcow2 pattern test, empty and compressed image - 4k cluster patterns
#
# 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"

status=1	# failure is the default!

_cleanup()
{
	_cleanup_test_img
}
trap "_cleanup; exit \$status" 0 1 2 3 15

# get standard environment, filters and checks
. ./common.rc
. ./common.filter
. ./common.pattern

# much of this could be generic for any format supporting compression.
_supported_fmt qcow qcow2
_supported_proto file
_supported_os Linux

TEST_OFFSETS="0 4294967296"
TEST_OPS="writev read write readv"
CLUSTER_SIZE=4096

_make_test_img 6G

echo "Testing empty image"
echo

for offset in $TEST_OFFSETS; do
    echo "At offset $offset:"
    for op in $TEST_OPS; do
        io_test $op $offset $CLUSTER_SIZE 8
    done
    _check_test_img
done


echo "Compressing image"
echo

mv "$TEST_IMG" "$TEST_IMG.orig"
$QEMU_IMG convert -f $IMGFMT -O $IMGFMT -c "$TEST_IMG.orig" "$TEST_IMG"

echo "Testing compressed image"
echo

for offset in $TEST_OFFSETS; do
    echo "With offset $offset:"
    for op in read readv; do
        io_test $op $offset $CLUSTER_SIZE 8
    done
    _check_test_img
done

echo "Testing compressed image with odd offsets"
echo
for offset in $TEST_OFFSETS; do
    # Some odd offset (1 sector), so tests will write to areas occupied partly
    # by old (compressed) data and empty clusters
    offset=$((offset + 512))
    echo "With offset $offset:"
    for op in $TEST_OPS; do
        io_test $op $offset $CLUSTER_SIZE 8
    done
    _check_test_img
done

# success, all done
echo "*** done"
rm -f $seq.full
status=0