Re: [Qemu-devel] [PATCH 19/25] iotests: test qcow2 persistent dirty bitmap

[John Snow <jsnow@redhat.com>]

On 02/14/2017 11:59 AM, Vladimir Sementsov-Ogievskiy wrote:
> Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
> Reviewed-by: Max Reitz <mreitz@redhat.com>
> ---
>  tests/qemu-iotests/165     | 89 ++++++++++++++++++++++++++++++++++++++++++++++
>  tests/qemu-iotests/165.out |  5 +++
>  tests/qemu-iotests/group   |  1 +
>  3 files changed, 95 insertions(+)
>  create mode 100755 tests/qemu-iotests/165
>  create mode 100644 tests/qemu-iotests/165.out
> 
> diff --git a/tests/qemu-iotests/165 b/tests/qemu-iotests/165
> new file mode 100755
> index 0000000..d583b33
> --- /dev/null
> +++ b/tests/qemu-iotests/165
> @@ -0,0 +1,89 @@
> +#!/usr/bin/env python
> +#
> +# Tests for persistent dirty bitmaps.
> +#
> +# Copyright: Vladimir Sementsov-Ogievskiy 2015-2017
> +#
> +# 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/>.
> +#
> +
> +import os
> +import iotests
> +from iotests import qemu_img
> +
> +disk = os.path.join(iotests.test_dir, 'disk')
> +disk_size = 0x40000000 # 1G
> +
> +# regions for qemu_io: (start, count) in bytes
> +regions1 = ((0,        0x100000),
> +            (0x200000, 0x100000))
> +
> +regions2 = ((0x10000000, 0x20000),
> +            (0x3fff0000, 0x10000))
> +
> +class TestPersistentDirtyBitmap(iotests.QMPTestCase):
> +
> +    def setUp(self):
> +        qemu_img('create', '-f', iotests.imgfmt, disk, str(disk_size))
> +
> +    def tearDown(self):
> +        os.remove(disk)
> +
> +    def mkVm(self):
> +        return iotests.VM().add_drive(disk)
> +
> +    def getSha256(self):
> +        result = self.vm.qmp('x-debug-block-dirty-bitmap-sha256',
> +                             node='drive0', name='bitmap0')
> +        return result['return']['sha256']
> +
> +    def checkBitmap(self, sha256):
> +        result = self.vm.qmp('x-debug-block-dirty-bitmap-sha256',
> +                             node='drive0', name='bitmap0')
> +        self.assert_qmp(result, 'return/sha256', sha256);
> +
> +    def writeRegions(self, regions):
> +        for r in regions:
> +            self.vm.hmp_qemu_io('drive0',
> +                                'write %d %d' % r)
> +
> +    def qmpAddBitmap(self):
> +        self.vm.qmp('block-dirty-bitmap-add', node='drive0',
> +                    name='bitmap0', persistent=True, autoload=True)
> +
> +    def test_persistent(self):
> +        self.vm = self.mkVm()
> +        self.vm.launch()
> +        self.qmpAddBitmap()
> +
> +        self.writeRegions(regions1)
> +        sha256 = self.getSha256()
> +
> +        self.vm.shutdown()
> +        self.vm = self.mkVm()
> +        self.vm.launch()
> +
> +        self.checkBitmap(sha256)
> +        self.writeRegions(regions2)
> +        sha256 = self.getSha256()
> +
> +        self.vm.shutdown()
> +        self.vm.launch()
> +
> +        self.checkBitmap(sha256)
> +
> +        self.vm.shutdown()
> +
> +if __name__ == '__main__':
> +    iotests.main(supported_fmts=['qcow2'])
> diff --git a/tests/qemu-iotests/165.out b/tests/qemu-iotests/165.out
> new file mode 100644
> index 0000000..ae1213e
> --- /dev/null
> +++ b/tests/qemu-iotests/165.out
> @@ -0,0 +1,5 @@
> +.
> +----------------------------------------------------------------------
> +Ran 1 tests
> +
> +OK
> diff --git a/tests/qemu-iotests/group b/tests/qemu-iotests/group
> index 866c1a0..8bd7a84 100644
> --- a/tests/qemu-iotests/group
> +++ b/tests/qemu-iotests/group
> @@ -162,6 +162,7 @@
>  159 rw auto quick
>  160 rw auto quick
>  162 auto quick
> +165 rw auto quick
>  170 rw auto quick
>  171 rw auto quick
>  172 auto
> 

Good enough for a basic test for now.

We'll want to test the error cases of the persistence and autoload flags
eventually.

Reviewed-by: John Snow <jsnow@redhat.com>