+ drive0 = self.drives[0]
+
+ # Create a cluster_size=128k full backup / "anchor" backup
+ self.img_create(drive0['backup'], cluster_size='128k')
+ self.assertTrue(self.do_qmp_backup(device=drive0['id'], sync='full',
+ format=drive0['fmt'],
+ target=drive0['backup'],
+ mode='existing'))
+
+ # Create bitmap and dirty it with some new writes.
+ # overwrite [32736, 32799] which will dirty bitmap clusters at
+ # 32M-64K and 32M. 32M+64K will be left undirtied.
+ bitmap0 = self.add_bitmap('bitmap0', drive0)
+ self.hmp_io_writes(drive0['id'],
+ (('0xab', 0, 512),
+ ('0xfe', '16M', '256k'),
+ ('0x64', '32736k', '64k')))
+
+
+ # Prepare a cluster_size=128k backup target without a backing file.
+ (target, _) = bitmap0.new_target()
+ self.img_create(target, bitmap0.drive['fmt'], cluster_size='128k')
+
+ # Perform Incremental Backup
+ self.assertTrue(self.do_qmp_backup(device=bitmap0.drive['id'],
+ sync='incremental',
+ bitmap=bitmap0.name,
+ format=bitmap0.drive['fmt'],
+ target=target,
+ mode='existing'))
+ self.make_reference_backup(bitmap0)
+
+ # Add the backing file, then compare and exit.
+ iotests.qemu_img('rebase', '-f', drive0['fmt'], '-u', '-b',
+ drive0['backup'], '-F', drive0['fmt'], target)
+ self.vm.shutdown()
+ self.check_backups()
+
+
+ def test_incremental_transaction(self):
+ '''Test: Verify backups made from transactionally created bitmaps.
+
+ Create a bitmap "before" VM execution begins, then create a second
+ bitmap AFTER writes have already occurred. Use transactions to create
+ a full backup and synchronize both bitmaps to this backup.
+ Create an incremental backup through both bitmaps and verify that
+ both backups match the current drive0 image.
+ '''
+
+ drive0 = self.drives[0]
+ bitmap0 = self.add_bitmap('bitmap0', drive0)
+ self.hmp_io_writes(drive0['id'], (('0xab', 0, 512),
+ ('0xfe', '16M', '256k'),
+ ('0x64', '32736k', '64k')))
+ bitmap1 = self.add_bitmap('bitmap1', drive0)
+
+ result = self.vm.qmp('transaction', actions=[
+ transaction_bitmap_clear(bitmap0.drive['id'], bitmap0.name),
+ transaction_bitmap_clear(bitmap1.drive['id'], bitmap1.name),
+ transaction_drive_backup(drive0['id'], drive0['backup'],
+ sync='full', format=drive0['fmt'])
+ ])
+ self.assert_qmp(result, 'return', {})
+ self.wait_until_completed(drive0['id'])
+ self.files.append(drive0['backup'])
+
+ self.hmp_io_writes(drive0['id'], (('0x9a', 0, 512),
+ ('0x55', '8M', '352k'),
+ ('0x78', '15872k', '1M')))
+ # Both bitmaps should be correctly in sync.
+ self.create_incremental(bitmap0)
+ self.create_incremental(bitmap1)
+ self.vm.shutdown()
+ self.check_backups()