Commit 749ad5e8 authored by John Snow's avatar John Snow Committed by Kevin Wolf
Browse files

iotests: add transactional incremental backup test 



Test simple usage cases for using transactions to create
and synchronize incremental backups.

Signed-off-by: default avatarJohn Snow <jsnow@redhat.com>
Reviewed-by: default avatarMax Reitz <mreitz@redhat.com>
Reviewed-by: default avatarStefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: default avatarStefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: default avatarFam Zheng <famz@redhat.com>
Signed-off-by: default avatarFam Zheng <famz@redhat.com>
Message-id: 1446765200-3054-3-git-send-email-jsnow@redhat.com
Signed-off-by: default avatarStefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: default avatarKevin Wolf <kwolf@redhat.com>
parent df9a681d

tests/qemu-iotests/124

+54 −0
Original line number Diff line number Diff line
@@ -36,6 +36,23 @@ def try_remove(img): 
        pass





def transaction_action(action, **kwargs):

    return {

        'type': action,

        'data': kwargs

    }





def transaction_bitmap_clear(node, name, **kwargs):

    return transaction_action('block-dirty-bitmap-clear',

                              node=node, name=name, **kwargs)





def transaction_drive_backup(device, target, **kwargs):

    return transaction_action('drive-backup', device=device, target=target,

                              **kwargs)





class Bitmap:

    def __init__(self, name, drive):

        self.name = name
@@ -264,6 +281,43 @@ class TestIncrementalBackup(iotests.QMPTestCase): 
        return self.do_incremental_simple(granularity=131072)





    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()





    def test_incremental_failure(self):

        '''Test: Verify backups made after a failure are correct.

tests/qemu-iotests/124.out

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Ran 7 tests

Ran 8 tests



OK