Re: [Qemu-devel] [PATCH] iotests: fix 254 for qcow (1)

[Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>]

05.06.2019 18:33, Max Reitz wrote:
> On 05.06.19 17:26, Vladimir Sementsov-Ogievskiy wrote:
>> Qcow default cluster size is 4k, but default format of created overlay
>> image on snapshot operation is qcow2 with it's default cluster of 64k.
> 
> Then I wonder why we run this test even for anything but qcow2.
> 
> I forgot to mention that this test also fails for all image formats that
> do not support image creation.  So we need some form of
> iotests.verify_image_format() anyway.  If half of this test requires
> qcow2, and the other half does not really care about the image format,
> then why not just restrict it to qcow2 altogether.

Hmm, then better restrict to qcow2 ofcourse.

> 
> (Or restrict it to all formats that support backing files, and then
> explicitly specify the format when creating the snapshot?)
> 
> Max
> 
>> This leads to block-dirty-bitmap-merge fail when test run for qcow
>> format, as it can't merge bitmaps with different granularities.
>> Let's fix it by specifying strict granularity.
>>
>> Reported-by: Max Reitz <mreitz@redhat.com>
>> Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
>> ---
>>   tests/qemu-iotests/254     | 5 +++--
>>   tests/qemu-iotests/254.out | 3 ++-
>>   2 files changed, 5 insertions(+), 3 deletions(-)
>>
>> diff --git a/tests/qemu-iotests/254 b/tests/qemu-iotests/254
>> index 33cb80a512..a8ea5818ff 100755
>> --- a/tests/qemu-iotests/254
>> +++ b/tests/qemu-iotests/254
>> @@ -29,7 +29,8 @@ qemu_img_create('-f', iotests.imgfmt, disk, str(size))
>>   vm = iotests.VM().add_drive(disk, opts='node-name=base')
>>   vm.launch()
>>   
>> -vm.qmp_log('block-dirty-bitmap-add', node='drive0', name='bitmap0')
>> +vm.qmp_log('block-dirty-bitmap-add', node='drive0', name='bitmap0',
>> +           granularity=65536)
>>   
>>   vm.hmp_qemu_io('drive0', 'write 0 512K')
>>   
>> @@ -38,7 +39,7 @@ vm.qmp_log('transaction', indent=2, actions=[
>>        'data': {'device': 'drive0', 'snapshot-file': top,
>>                 'snapshot-node-name': 'snap'}},
>>       {'type': 'block-dirty-bitmap-add',
>> -     'data': {'node': 'snap', 'name': 'bitmap0'}},
>> +     'data': {'node': 'snap', 'name': 'bitmap0', 'granularity': 65536}},
>>       {'type': 'block-dirty-bitmap-merge',
>>        'data': {'node': 'snap', 'target': 'bitmap0',
>>                 'bitmaps': [{'node': 'base', 'name': 'bitmap0'}]}}
>> diff --git a/tests/qemu-iotests/254.out b/tests/qemu-iotests/254.out
>> index d7394cf002..dc899016da 100644
>> --- a/tests/qemu-iotests/254.out
>> +++ b/tests/qemu-iotests/254.out
>> @@ -1,4 +1,4 @@
>> -{"execute": "block-dirty-bitmap-add", "arguments": {"name": "bitmap0", "node": "drive0"}}
>> +{"execute": "block-dirty-bitmap-add", "arguments": {"granularity": 65536, "name": "bitmap0", "node": "drive0"}}
>>   {"return": {}}
>>   {
>>     "execute": "transaction",
>> @@ -14,6 +14,7 @@
>>         },
>>         {
>>           "data": {
>> +          "granularity": 65536,
>>             "name": "bitmap0",
>>             "node": "snap"
>>           },
>>
> 
> 


-- 
Best regards,
Vladimir