From: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>

Test clearing unknown autoclear_features by qcow2 on incoming
migration.

[ kwolf: Fixed wait for destination VM startup ]

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
---
 tests/qemu-iotests/196     | 66 ++++++++++++++++++++++++++++++++++++++++++++++
 tests/qemu-iotests/196.out |  5 ++++
 tests/qemu-iotests/group   |  1 +
 3 files changed, 72 insertions(+)
 create mode 100755 tests/qemu-iotests/196
 create mode 100644 tests/qemu-iotests/196.out

diff --git a/tests/qemu-iotests/196 b/tests/qemu-iotests/196
new file mode 100755
index 0000000000..4116ebc92b
--- /dev/null
+++ b/tests/qemu-iotests/196
@@ -0,0 +1,66 @@
+#!/usr/bin/env python
+#
+# Test clearing unknown autoclear_features flag by qcow2 after
+# migration. This test mimics migration to older qemu.
+#
+# Copyright (c) 2017 Parallels International GmbH
+#
+# 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')
+migfile = os.path.join(iotests.test_dir, 'migfile')
+
+class TestInvalidateAutoclear(iotests.QMPTestCase):
+
+    def tearDown(self):
+        self.vm_a.shutdown()
+        self.vm_b.shutdown()
+        os.remove(disk)
+        os.remove(migfile)
+
+    def setUp(self):
+        qemu_img('create', '-f', iotests.imgfmt, disk, '1M')
+
+        self.vm_a = iotests.VM(path_suffix='a').add_drive(disk)
+        self.vm_a.launch()
+
+        self.vm_b = iotests.VM(path_suffix='b').add_drive(disk)
+        self.vm_b.add_incoming("exec: cat '" + migfile + "'")
+
+    def test_migration(self):
+        result = self.vm_a.qmp('migrate', uri='exec:cat>' + migfile)
+        self.assert_qmp(result, 'return', {});
+        self.assertNotEqual(self.vm_a.event_wait("STOP"), None)
+
+        with open(disk, 'r+b') as f:
+            f.seek(88) # first byte of autoclear_features field
+            f.write(b'\xff')
+
+        self.vm_b.launch()
+        while True:
+            result = self.vm_b.qmp('query-status')
+            if result['return']['status'] == 'running':
+                break
+
+        with open(disk, 'rb') as f:
+            f.seek(88)
+            self.assertEqual(f.read(1), b'\x00')
+
+if __name__ == '__main__':
+    iotests.main(supported_fmts=['qcow2'])
diff --git a/tests/qemu-iotests/196.out b/tests/qemu-iotests/196.out
new file mode 100644
index 0000000000..ae1213e6f8
--- /dev/null
+++ b/tests/qemu-iotests/196.out
@@ -0,0 +1,5 @@
+.
+----------------------------------------------------------------------
+Ran 1 tests
+
+OK
diff --git a/tests/qemu-iotests/group b/tests/qemu-iotests/group
index 83b839bbe3..1fad602152 100644
--- a/tests/qemu-iotests/group
+++ b/tests/qemu-iotests/group
@@ -193,5 +193,6 @@
 192 rw auto quick
 194 rw auto migration quick
 195 rw auto quick
+196 rw auto quick
 197 rw auto quick
 198 rw auto
-- 
2.13.6

On 2017-11-17 16:47, Kevin Wolf wrote:
> From: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
> 
> Test clearing unknown autoclear_features by qcow2 on incoming
> migration.
> 
> [ kwolf: Fixed wait for destination VM startup ]
> 
> Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
> ---
>  tests/qemu-iotests/196     | 66 ++++++++++++++++++++++++++++++++++++++++++++++
>  tests/qemu-iotests/196.out |  5 ++++
>  tests/qemu-iotests/group   |  1 +
>  3 files changed, 72 insertions(+)
>  create mode 100755 tests/qemu-iotests/196
>  create mode 100644 tests/qemu-iotests/196.out
> 
> diff --git a/tests/qemu-iotests/196 b/tests/qemu-iotests/196
> new file mode 100755
> index 0000000000..4116ebc92b
> --- /dev/null
> +++ b/tests/qemu-iotests/196
> @@ -0,0 +1,66 @@
> +#!/usr/bin/env python
> +#
> +# Test clearing unknown autoclear_features flag by qcow2 after
> +# migration. This test mimics migration to older qemu.
> +#
> +# Copyright (c) 2017 Parallels International GmbH
> +#
> +# 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')
> +migfile = os.path.join(iotests.test_dir, 'migfile')
> +
> +class TestInvalidateAutoclear(iotests.QMPTestCase):
> +
> +    def tearDown(self):
> +        self.vm_a.shutdown()
> +        self.vm_b.shutdown()
> +        os.remove(disk)
> +        os.remove(migfile)
> +
> +    def setUp(self):
> +        qemu_img('create', '-f', iotests.imgfmt, disk, '1M')
> +
> +        self.vm_a = iotests.VM(path_suffix='a').add_drive(disk)
> +        self.vm_a.launch()
> +
> +        self.vm_b = iotests.VM(path_suffix='b').add_drive(disk)
> +        self.vm_b.add_incoming("exec: cat '" + migfile + "'")
> +
> +    def test_migration(self):
> +        result = self.vm_a.qmp('migrate', uri='exec:cat>' + migfile)
> +        self.assert_qmp(result, 'return', {});
> +        self.assertNotEqual(self.vm_a.event_wait("STOP"), None)
> +
> +        with open(disk, 'r+b') as f:
> +            f.seek(88) # first byte of autoclear_features field
> +            f.write(b'\xff')
> +
> +        self.vm_b.launch()
> +        while True:
> +            result = self.vm_b.qmp('query-status')
> +            if result['return']['status'] == 'running':
> +                break
> +
> +        with open(disk, 'rb') as f:
> +            f.seek(88)
> +            self.assertEqual(f.read(1), b'\x00')

I guess I'd rather shutdown the VM first and do the check then, but
since the header is updated on-disk when opening the qcow2 file...

Reviewed-by: Max Reitz <mreitz@redhat.com>

> +
> +if __name__ == '__main__':
> +    iotests.main(supported_fmts=['qcow2'])
> diff --git a/tests/qemu-iotests/196.out b/tests/qemu-iotests/196.out
> new file mode 100644
> index 0000000000..ae1213e6f8
> --- /dev/null
> +++ b/tests/qemu-iotests/196.out
> @@ -0,0 +1,5 @@
> +.
> +----------------------------------------------------------------------
> +Ran 1 tests
> +
> +OK
> diff --git a/tests/qemu-iotests/group b/tests/qemu-iotests/group
> index 83b839bbe3..1fad602152 100644
> --- a/tests/qemu-iotests/group
> +++ b/tests/qemu-iotests/group
> @@ -193,5 +193,6 @@
>  192 rw auto quick
>  194 rw auto migration quick
>  195 rw auto quick
> +196 rw auto quick
>  197 rw auto quick
>  198 rw auto
>