[v5,3/9] iotests: add test-case to 165 to test reopening qcow2 bitmaps to RW

Reopening bitmaps to RW was broken prior to previous commit. Check that
it works now.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
---
 tests/qemu-iotests/165     | 57 ++++++++++++++++++++++++++++++++++++--
 tests/qemu-iotests/165.out |  4 +--
 2 files changed, 57 insertions(+), 4 deletions(-)

On 9/27/19 8:23 AM, Vladimir Sementsov-Ogievskiy wrote:
> Reopening bitmaps to RW was broken prior to previous commit. Check that
> it works now.
> 
> Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
> ---
>  tests/qemu-iotests/165     | 57 ++++++++++++++++++++++++++++++++++++--
>  tests/qemu-iotests/165.out |  4 +--
>  2 files changed, 57 insertions(+), 4 deletions(-)
> 
> diff --git a/tests/qemu-iotests/165 b/tests/qemu-iotests/165
> index 5650dc7c87..951ea011a2 100755
> --- a/tests/qemu-iotests/165
> +++ b/tests/qemu-iotests/165
> @@ -43,10 +43,10 @@ class TestPersistentDirtyBitmap(iotests.QMPTestCase):
>          os.remove(disk)
>  
>      def mkVm(self):
> -        return iotests.VM().add_drive(disk)
> +        return iotests.VM().add_drive(disk, opts='node-name=node0')
>  
>      def mkVmRo(self):
> -        return iotests.VM().add_drive(disk, opts='readonly=on')
> +        return iotests.VM().add_drive(disk, opts='readonly=on,node-name=node0')
>  
>      def getSha256(self):
>          result = self.vm.qmp('x-debug-block-dirty-bitmap-sha256',
> @@ -102,6 +102,59 @@ class TestPersistentDirtyBitmap(iotests.QMPTestCase):
>  
>          self.vm.shutdown()
>  
> +    def test_reopen_rw(self):
> +        self.vm = self.mkVm()
> +        self.vm.launch()
> +        self.qmpAddBitmap()
> +
> +        # Calculate hashes
> +
> +        self.writeRegions(regions1)
> +        sha256_1 = self.getSha256()
> +
> +        self.writeRegions(regions2)
> +        sha256_2 = self.getSha256()
> +        assert sha256_1 != sha256_2 # Otherwise, it's not very interesting.
> +
> +        result = self.vm.qmp('block-dirty-bitmap-clear', node='drive0',
> +                             name='bitmap0')
> +        self.assert_qmp(result, 'return', {})
> +
> +        # Start with regions1
> +
> +        self.writeRegions(regions1)
> +        assert sha256_1 == self.getSha256()
> +
> +        self.vm.shutdown()
> +
> +        self.vm = self.mkVmRo()
> +        self.vm.launch()
> +
> +        assert sha256_1 == self.getSha256()
> +
> +        # Check that we are in RO mode and can't modify bitmap.
> +        self.writeRegions(regions2)
> +        assert sha256_1 == self.getSha256()
> +
> +        # Reopen to RW
> +        result = self.vm.qmp('x-blockdev-reopen', **{
> +            'node-name': 'node0',
> +            'driver': iotests.imgfmt,
> +            'file': {
> +                'driver': 'file',
> +                'filename': disk
> +            },
> +            'read-only': False
> +        })
> +        self.assert_qmp(result, 'return', {})
> +
> +        # Check that bitmap is reopened to RW and we can write to it.
> +        self.writeRegions(regions2)
> +        assert sha256_2 == self.getSha256()
> +
> +        self.vm.shutdown()
> +
> +
>  if __name__ == '__main__':
>      iotests.main(supported_fmts=['qcow2'],
>                   supported_protocols=['file'])
> diff --git a/tests/qemu-iotests/165.out b/tests/qemu-iotests/165.out
> index ae1213e6f8..fbc63e62f8 100644
> --- a/tests/qemu-iotests/165.out
> +++ b/tests/qemu-iotests/165.out
> @@ -1,5 +1,5 @@
> -.
> +..
>  ----------------------------------------------------------------------
> -Ran 1 tests
> +Ran 2 tests
>  
>  OK
> 

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