Archipelago » qemu

#!/bin/bash

#

# Test qcow2 lazy refcounts

#

# Copyright (C) 2012 Red Hat, Inc.

# Copyright IBM, Corp. 2010

#

# Based on test 038.

#

# 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=stefanha@linux.vnet.ibm.com

seq=`basename $0`

echo "QA output created by $seq"

here=`pwd`

tmp=/tmp/$$

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

_supported_fmt qcow2

_supported_proto file

_supported_os Linux

_default_cache_mode "writethrough"

_supported_cache_modes "writethrough"

size=128M

echo

echo "== Checking that image is clean on shutdown =="

IMGOPTS="compat=1.1,lazy_refcounts=on"

_make_test_img $size

$QEMU_IO -c "write -P 0x5a 0 512" "$TEST_IMG" | _filter_qemu_io

# The dirty bit must not be set

./qcow2.py "$TEST_IMG" dump-header | grep incompatible_features

_check_test_img

echo

echo "== Creating a dirty image file =="

IMGOPTS="compat=1.1,lazy_refcounts=on"

_make_test_img $size

old_ulimit=$(ulimit -c)

ulimit -c 0 # do not produce a core dump on abort(3)

$QEMU_IO -c "write -P 0x5a 0 512" -c "abort" "$TEST_IMG" | _filter_qemu_io

ulimit -c "$old_ulimit"

# The dirty bit must be set

./qcow2.py "$TEST_IMG" dump-header | grep incompatible_features

_check_test_img

echo

echo "== Read-only access must still work =="

$QEMU_IO -r -c "read -P 0x5a 0 512" "$TEST_IMG" | _filter_qemu_io

# The dirty bit must be set

./qcow2.py "$TEST_IMG" dump-header | grep incompatible_features

echo

echo "== Repairing the image file must succeed =="

_check_test_img -r all

# The dirty bit must not be set

./qcow2.py "$TEST_IMG" dump-header | grep incompatible_features

echo

echo "== Data should still be accessible after repair =="

$QEMU_IO -c "read -P 0x5a 0 512" "$TEST_IMG" | _filter_qemu_io

echo

echo "== Opening a dirty image read/write should repair it =="

IMGOPTS="compat=1.1,lazy_refcounts=on"

_make_test_img $size

old_ulimit=$(ulimit -c)

ulimit -c 0 # do not produce a core dump on abort(3)

$QEMU_IO -c "write -P 0x5a 0 512" -c "abort" "$TEST_IMG" | _filter_qemu_io

ulimit -c "$old_ulimit"

# The dirty bit must be set

./qcow2.py "$TEST_IMG" dump-header | grep incompatible_features

$QEMU_IO -c "write 0 512" "$TEST_IMG" | _filter_qemu_io

# The dirty bit must not be set

./qcow2.py "$TEST_IMG" dump-header | grep incompatible_features

echo

echo "== Creating an image file with lazy_refcounts=off =="

IMGOPTS="compat=1.1,lazy_refcounts=off"

_make_test_img $size

old_ulimit=$(ulimit -c)

ulimit -c 0 # do not produce a core dump on abort(3)

$QEMU_IO -c "write -P 0x5a 0 512" -c "abort" "$TEST_IMG" | _filter_qemu_io

ulimit -c "$old_ulimit"

# The dirty bit must not be set since lazy_refcounts=off

./qcow2.py "$TEST_IMG" dump-header | grep incompatible_features

_check_test_img

# success, all done

echo "*** done"

rm -f $seq.full

status=0