iotests: add test 260 to check bitmap life after snapshot + commit

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-id: 20190927122355.7344-8-vsementsov@virtuozzo.com
[Maintainer edit: removed 260 from auto group per Peter Maydell. --js]
Signed-off-by: John Snow <jsnow@redhat.com>

tests/qemu-iotests/260

@@ -0,0 +1,89 @@
+#!/usr/bin/env python
+#
+# Tests for temporary external snapshot when we have bitmaps.
+#
+# Copyright (c) 2019 Virtuozzo International GmbH. All rights reserved.
+#
+# 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 iotests
+from iotests import qemu_img_create, file_path, log, filter_qmp_event
+
+iotests.verify_image_format(supported_fmts=['qcow2'])
+
+base, top = file_path('base', 'top')
+size = 64 * 1024 * 3
+
+
+def print_bitmap(msg, vm):
+    result = vm.qmp('query-block')['return'][0]
+    if 'dirty-bitmaps' in result:
+        bitmap = result['dirty-bitmaps'][0]
+        log('{}: name={} dirty-clusters={}'.format(msg, bitmap['name'],
+            bitmap['count'] // 64 // 1024))
+    else:
+        log(msg + ': not found')
+
+
+def test(persistent, restart):
+    assert persistent or not restart
+    log("\nTestcase {}persistent {} restart\n".format(
+            '' if persistent else 'non-', 'with' if restart else 'without'))
+
+    qemu_img_create('-f', iotests.imgfmt, base, str(size))
+
+    vm = iotests.VM().add_drive(base)
+    vm.launch()
+
+    vm.qmp_log('block-dirty-bitmap-add', node='drive0', name='bitmap0',
+               persistent=persistent)
+    vm.hmp_qemu_io('drive0', 'write 0 64K')
+    print_bitmap('initial bitmap', vm)
+
+    vm.qmp_log('blockdev-snapshot-sync', device='drive0', snapshot_file=top,
+               format=iotests.imgfmt, filters=[iotests.filter_qmp_testfiles])
+    vm.hmp_qemu_io('drive0', 'write 64K 512')
+    print_bitmap('check that no bitmaps are in snapshot', vm)
+
+    if restart:
+        log("... Restart ...")
+        vm.shutdown()
+        vm = iotests.VM().add_drive(top)
+        vm.launch()
+
+    vm.qmp_log('block-commit', device='drive0', top=top,
+               filters=[iotests.filter_qmp_testfiles])
+    ev = vm.events_wait((('BLOCK_JOB_READY', None),
+                         ('BLOCK_JOB_COMPLETED', None)))
+    log(filter_qmp_event(ev))
+    if (ev['event'] == 'BLOCK_JOB_COMPLETED'):
+        vm.shutdown()
+        log(vm.get_log())
+        exit()
+
+    vm.qmp_log('block-job-complete', device='drive0')
+    ev = vm.event_wait('BLOCK_JOB_COMPLETED')
+    log(filter_qmp_event(ev))
+    print_bitmap('check bitmap after commit', vm)
+
+    vm.hmp_qemu_io('drive0', 'write 128K 64K')
+    print_bitmap('check updated bitmap', vm)
+
+    vm.shutdown()
+
+
+test(persistent=False, restart=False)
+test(persistent=True, restart=False)
+test(persistent=True, restart=True)

tests/qemu-iotests/260.out

@@ -0,0 +1,52 @@
+
+Testcase non-persistent without restart
+
+{"execute": "block-dirty-bitmap-add", "arguments": {"name": "bitmap0", "node": "drive0", "persistent": false}}
+{"return": {}}
+initial bitmap: name=bitmap0 dirty-clusters=1
+{"execute": "blockdev-snapshot-sync", "arguments": {"device": "drive0", "format": "qcow2", "snapshot-file": "TEST_DIR/PID-top"}}
+{"return": {}}
+check that no bitmaps are in snapshot: not found
+{"execute": "block-commit", "arguments": {"device": "drive0", "top": "TEST_DIR/PID-top"}}
+{"return": {}}
+{"data": {"device": "drive0", "len": 65536, "offset": 65536, "speed": 0, "type": "commit"}, "event": "BLOCK_JOB_READY", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"execute": "block-job-complete", "arguments": {"device": "drive0"}}
+{"return": {}}
+{"data": {"device": "drive0", "len": 65536, "offset": 65536, "speed": 0, "type": "commit"}, "event": "BLOCK_JOB_COMPLETED", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+check bitmap after commit: name=bitmap0 dirty-clusters=2
+check updated bitmap: name=bitmap0 dirty-clusters=3
+
+Testcase persistent without restart
+
+{"execute": "block-dirty-bitmap-add", "arguments": {"name": "bitmap0", "node": "drive0", "persistent": true}}
+{"return": {}}
+initial bitmap: name=bitmap0 dirty-clusters=1
+{"execute": "blockdev-snapshot-sync", "arguments": {"device": "drive0", "format": "qcow2", "snapshot-file": "TEST_DIR/PID-top"}}
+{"return": {}}
+check that no bitmaps are in snapshot: not found
+{"execute": "block-commit", "arguments": {"device": "drive0", "top": "TEST_DIR/PID-top"}}
+{"return": {}}
+{"data": {"device": "drive0", "len": 65536, "offset": 65536, "speed": 0, "type": "commit"}, "event": "BLOCK_JOB_READY", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"execute": "block-job-complete", "arguments": {"device": "drive0"}}
+{"return": {}}
+{"data": {"device": "drive0", "len": 65536, "offset": 65536, "speed": 0, "type": "commit"}, "event": "BLOCK_JOB_COMPLETED", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+check bitmap after commit: name=bitmap0 dirty-clusters=2
+check updated bitmap: name=bitmap0 dirty-clusters=3
+
+Testcase persistent with restart
+
+{"execute": "block-dirty-bitmap-add", "arguments": {"name": "bitmap0", "node": "drive0", "persistent": true}}
+{"return": {}}
+initial bitmap: name=bitmap0 dirty-clusters=1
+{"execute": "blockdev-snapshot-sync", "arguments": {"device": "drive0", "format": "qcow2", "snapshot-file": "TEST_DIR/PID-top"}}
+{"return": {}}
+check that no bitmaps are in snapshot: not found
+... Restart ...
+{"execute": "block-commit", "arguments": {"device": "drive0", "top": "TEST_DIR/PID-top"}}
+{"return": {}}
+{"data": {"device": "drive0", "len": 65536, "offset": 65536, "speed": 0, "type": "commit"}, "event": "BLOCK_JOB_READY", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+{"execute": "block-job-complete", "arguments": {"device": "drive0"}}
+{"return": {}}
+{"data": {"device": "drive0", "len": 65536, "offset": 65536, "speed": 0, "type": "commit"}, "event": "BLOCK_JOB_COMPLETED", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
+check bitmap after commit: name=bitmap0 dirty-clusters=2
+check updated bitmap: name=bitmap0 dirty-clusters=3

tests/qemu-iotests/group

@@ -273,6 +273,7 @@
 256 rw quick
 257 rw
 258 rw quick
+260 rw quick
 262 rw quick migration
 263 rw quick
 265 rw auto quick