[v10,08/14] iotests: prepare 124 and 257 bitmap querying for backup-top filter
diff mbox series

Message ID 20190830161228.54238-9-vsementsov@virtuozzo.com
State New
Headers show
Series
  • backup-top filter driver for backup
Related show

Commit Message

Vladimir Sementsov-Ogievskiy Aug. 30, 2019, 4:12 p.m. UTC
After backup-top filter appearing it's not possible to see dirty
bitmaps in top node, so use node-name instead.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
---
 tests/qemu-iotests/124        |  83 ++++----
 tests/qemu-iotests/257        |  49 ++---
 tests/qemu-iotests/257.out    | 364 +++++++++++++---------------------
 tests/qemu-iotests/iotests.py |  27 +++
 4 files changed, 219 insertions(+), 304 deletions(-)

Comments

Max Reitz Sept. 9, 2019, 1:25 p.m. UTC | #1
On 30.08.19 18:12, Vladimir Sementsov-Ogievskiy wrote:
> After backup-top filter appearing it's not possible to see dirty
> bitmaps in top node, so use node-name instead.
> 
> Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
> ---
>  tests/qemu-iotests/124        |  83 ++++----
>  tests/qemu-iotests/257        |  49 ++---
>  tests/qemu-iotests/257.out    | 364 +++++++++++++---------------------
>  tests/qemu-iotests/iotests.py |  27 +++
>  4 files changed, 219 insertions(+), 304 deletions(-)

[...]

> diff --git a/tests/qemu-iotests/iotests.py b/tests/qemu-iotests/iotests.py
> index 84438e837c..1906eb72f3 100644
> --- a/tests/qemu-iotests/iotests.py
> +++ b/tests/qemu-iotests/iotests.py
> @@ -643,6 +643,33 @@ class VM(qtest.QEMUQtestMachine):

[...]

> +    def check_bitmap_status(self, node_name, bitmap_name, fields):
> +        ret = self.get_bitmap(node_name, bitmap_name)
> +
> +        return fields.items() <= ret.items()

Why the <=?  AFAIU, it will compare each of the arrays’ elements one by
one and return true if all of the ones in @fields are less than or equal
to the ones in @ret.

But that would mean that the values given in @fields no longer need to
be equal to the ones in @ret.  On top of that, I suppose if
@fields.items() at some index contains a key that is not equal to the
key in @ret.items() at the same index, luck will determine whether the
comparison passes or not.

Why not just loop through all keys of @fields and check that @fields and
@ret contain the same value for all of them?

Max
Vladimir Sementsov-Ogievskiy Sept. 9, 2019, 1:49 p.m. UTC | #2
09.09.2019 16:25, Max Reitz wrote:
> On 30.08.19 18:12, Vladimir Sementsov-Ogievskiy wrote:
>> After backup-top filter appearing it's not possible to see dirty
>> bitmaps in top node, so use node-name instead.
>>
>> Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
>> ---
>>   tests/qemu-iotests/124        |  83 ++++----
>>   tests/qemu-iotests/257        |  49 ++---
>>   tests/qemu-iotests/257.out    | 364 +++++++++++++---------------------
>>   tests/qemu-iotests/iotests.py |  27 +++
>>   4 files changed, 219 insertions(+), 304 deletions(-)
> 
> [...]
> 
>> diff --git a/tests/qemu-iotests/iotests.py b/tests/qemu-iotests/iotests.py
>> index 84438e837c..1906eb72f3 100644
>> --- a/tests/qemu-iotests/iotests.py
>> +++ b/tests/qemu-iotests/iotests.py
>> @@ -643,6 +643,33 @@ class VM(qtest.QEMUQtestMachine):
> 
> [...]
> 
>> +    def check_bitmap_status(self, node_name, bitmap_name, fields):
>> +        ret = self.get_bitmap(node_name, bitmap_name)
>> +
>> +        return fields.items() <= ret.items()
> 
> Why the <=?  AFAIU, it will compare each of the arrays’ elements one by
> one and return true if all of the ones in @fields are less than or equal
> to the ones in @ret.

No, it's a valid way to check that one dict is subdict of another,
as dict_view works like Set class:

$ python3
Python 3.5.2 (default, Nov 23 2017, 16:37:01)
[GCC 5.4.0 20160609] on linux
Type "help", "copyright", "credits" or "license" for more information.
 >>> {1,2,3} <= {4,5,6}
False
 >>> {1,2,3} <= {0,3,2,1}
True
 >>> {'c':1, 'b':2}.items() <= {'a':4, 'b':2, 'c':1}.items()
True
 >>> {'c':1, 'b':2}.items() <= {'a':4, 'b':2, 'c':2}.items()
False
 >>> {'c':1, 'b':2}.items() <= {'a':4, 'b':2, 'c':0}.items()
False
 >>> {'c':1, 'b':2}.items() <= {'d':4, 'b':2}.items()
False
 >>> {'c':1, 'b':2}.items() <= {'c':1, 'b':3}.items()
False

Bad thing is that it's not so for python2, in which we need to use .viewitems() instead..

$ python2
Python 2.7.12 (default, Dec  4 2017, 14:50:18)
[GCC 5.4.0 20160609] on linux2
Type "help", "copyright", "credits" or "license" for more information.
 >>> {1,2,3} <= {0,3,2,1}
True
 >>> {'c':1, 'b':2}.items() <= {'a':4, 'b':2, 'c':1}.items()
False
 >>> {'c':1, 'b':2}.items() <= {'d':4, 'b':2}.items()
False
 >>>
 >>> {'c':1, 'b':2}.items() <= {'c':1, 'b':2}.items()
True
 >>> {'c':1, 'b':2}.items() <= {'c':1, 'b':3}.items()
True
 >>> {'c':1, 'b':2}.items() <= {'c':1, 'b':3}.items()
True

Should I care about python2 now, or we already dropped its support in iotests?

[and, honestly, I learned it all mostly from here https://stackoverflow.com/questions/30818694/test-if-dict-contained-in-dict]

> 
> But that would mean that the values given in @fields no longer need to
> be equal to the ones in @ret.  On top of that, I suppose if
> @fields.items() at some index contains a key that is not equal to the
> key in @ret.items() at the same index, luck will determine whether the
> comparison passes or not.
> 
> Why not just loop through all keys of @fields and check that @fields and
> @ret contain the same value for all of them?
> 
> Max
>
Max Reitz Sept. 9, 2019, 2:14 p.m. UTC | #3
On 09.09.19 15:49, Vladimir Sementsov-Ogievskiy wrote:
> 09.09.2019 16:25, Max Reitz wrote:
>> On 30.08.19 18:12, Vladimir Sementsov-Ogievskiy wrote:
>>> After backup-top filter appearing it's not possible to see dirty
>>> bitmaps in top node, so use node-name instead.
>>>
>>> Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
>>> ---
>>>   tests/qemu-iotests/124        |  83 ++++----
>>>   tests/qemu-iotests/257        |  49 ++---
>>>   tests/qemu-iotests/257.out    | 364 +++++++++++++---------------------
>>>   tests/qemu-iotests/iotests.py |  27 +++
>>>   4 files changed, 219 insertions(+), 304 deletions(-)
>>
>> [...]
>>
>>> diff --git a/tests/qemu-iotests/iotests.py b/tests/qemu-iotests/iotests.py
>>> index 84438e837c..1906eb72f3 100644
>>> --- a/tests/qemu-iotests/iotests.py
>>> +++ b/tests/qemu-iotests/iotests.py
>>> @@ -643,6 +643,33 @@ class VM(qtest.QEMUQtestMachine):
>>
>> [...]
>>
>>> +    def check_bitmap_status(self, node_name, bitmap_name, fields):
>>> +        ret = self.get_bitmap(node_name, bitmap_name)
>>> +
>>> +        return fields.items() <= ret.items()
>>
>> Why the <=?  AFAIU, it will compare each of the arrays’ elements one by
>> one and return true if all of the ones in @fields are less than or equal
>> to the ones in @ret.
> 
> No, it's a valid way to check that one dict is subdict of another,
> as dict_view works like Set class:

OK.  It looked to me like .items() just returned an array.  (When I
googled for how <= behaves here.)

[...]

> Should I care about python2 now, or we already dropped its support in iotests?

We haven’t officially.  OTOH, 4.2 is set to release on December 3, which
is less than one month before Python 2’s EOL.  So it would be close to
wrong to care at this point, I guess?

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

Patch
diff mbox series

diff --git a/tests/qemu-iotests/124 b/tests/qemu-iotests/124
index 3440f54781..5f5ed3070d 100755
--- a/tests/qemu-iotests/124
+++ b/tests/qemu-iotests/124
@@ -105,7 +105,7 @@  class TestIncrementalBackupBase(iotests.QMPTestCase):
         # Create a base image with a distinctive patterning
         drive0 = self.add_node('drive0')
         self.img_create(drive0['file'], drive0['fmt'])
-        self.vm.add_drive(drive0['file'])
+        self.vm.add_drive(drive0['file'], opts='node-name=node0')
         self.write_default_pattern(drive0['file'])
         self.vm.launch()
 
@@ -348,12 +348,14 @@  class TestIncrementalBackup(TestIncrementalBackupBase):
                             ('0xfe', '16M', '256k'),
                             ('0x64', '32736k', '64k')))
         # Check the dirty bitmap stats
-        result = self.vm.qmp('query-block')
-        self.assert_qmp(result, 'return[0]/dirty-bitmaps[0]/name', 'bitmap0')
-        self.assert_qmp(result, 'return[0]/dirty-bitmaps[0]/count', 458752)
-        self.assert_qmp(result, 'return[0]/dirty-bitmaps[0]/granularity', 65536)
-        self.assert_qmp(result, 'return[0]/dirty-bitmaps[0]/status', 'active')
-        self.assert_qmp(result, 'return[0]/dirty-bitmaps[0]/persistent', False)
+        self.assertTrue(self.vm.check_bitmap_status(
+            'node0', bitmap0.name, {
+                'name': 'bitmap0',
+                'count': 458752,
+                'granularity': 65536,
+                'status': 'active',
+                'persistent': False
+            }))
 
         # Prepare a cluster_size=128k backup target without a backing file.
         (target, _) = bitmap0.new_target()
@@ -670,9 +672,8 @@  class TestIncrementalBackupBlkdebug(TestIncrementalBackupBase):
         """
 
         drive0 = self.drives[0]
-        # NB: The blkdebug script here looks for a "flush, read, read" pattern.
-        # The flush occurs in hmp_io_writes, the first read in device_add, and
-        # the last read during the block job.
+        # NB: The blkdebug script here looks for a "flush, read" pattern.
+        # The flush occurs in hmp_io_writes, and the read during the block job.
         result = self.vm.qmp('blockdev-add',
                              node_name=drive0['id'],
                              driver=drive0['fmt'],
@@ -686,15 +687,11 @@  class TestIncrementalBackupBlkdebug(TestIncrementalBackupBase):
                                      'event': 'flush_to_disk',
                                      'state': 1,
                                      'new_state': 2
-                                 },{
-                                     'event': 'read_aio',
-                                     'state': 2,
-                                     'new_state': 3
                                  }],
                                  'inject-error': [{
                                      'event': 'read_aio',
                                      'errno': 5,
-                                     'state': 3,
+                                     'state': 2,
                                      'immediately': False,
                                      'once': True
                                  }],
@@ -708,23 +705,15 @@  class TestIncrementalBackupBlkdebug(TestIncrementalBackupBase):
                                           ('0xfe', '16M', '256k'),
                                           ('0x64', '32736k', '64k')))
 
-        # For the purposes of query-block visibility of bitmaps, add a drive
-        # frontend after we've written data; otherwise we can't use hmp-io
-        result = self.vm.qmp("device_add",
-                             id="device0",
-                             drive=drive0['id'],
-                             driver="virtio-blk")
-        self.assert_qmp(result, 'return', {})
-
         # Bitmap Status Check
-        query = self.vm.qmp('query-block')
-        ret = [bmap for bmap in query['return'][0]['dirty-bitmaps']
-               if bmap.get('name') == bitmap.name][0]
-        self.assert_qmp(ret, 'count', 458752)
-        self.assert_qmp(ret, 'granularity', 65536)
-        self.assert_qmp(ret, 'status', 'active')
-        self.assert_qmp(ret, 'busy', False)
-        self.assert_qmp(ret, 'recording', True)
+        self.assertTrue(self.vm.check_bitmap_status(
+            drive0['id'], bitmap.name, {
+                'count': 458752,
+                'granularity': 65536,
+                'status': 'active',
+                'busy': False,
+                'recording': True
+            }))
 
         # Start backup
         parent, _ = bitmap.last_target()
@@ -748,14 +737,14 @@  class TestIncrementalBackupBlkdebug(TestIncrementalBackupBase):
                                         'operation': 'read'})
 
         # Bitmap Status Check
-        query = self.vm.qmp('query-block')
-        ret = [bmap for bmap in query['return'][0]['dirty-bitmaps']
-               if bmap.get('name') == bitmap.name][0]
-        self.assert_qmp(ret, 'count', 458752)
-        self.assert_qmp(ret, 'granularity', 65536)
-        self.assert_qmp(ret, 'status', 'frozen')
-        self.assert_qmp(ret, 'busy', True)
-        self.assert_qmp(ret, 'recording', True)
+        self.assertTrue(self.vm.check_bitmap_status(
+            drive0['id'], bitmap.name, {
+                'count': 458752,
+                'granularity': 65536,
+                'status': 'frozen',
+                'busy': True,
+                'recording': True
+            }))
 
         # Resume and check incremental backup for consistency
         res = self.vm.qmp('block-job-resume', device=bitmap.drive['id'])
@@ -763,14 +752,14 @@  class TestIncrementalBackupBlkdebug(TestIncrementalBackupBase):
         self.wait_qmp_backup(bitmap.drive['id'])
 
         # Bitmap Status Check
-        query = self.vm.qmp('query-block')
-        ret = [bmap for bmap in query['return'][0]['dirty-bitmaps']
-               if bmap.get('name') == bitmap.name][0]
-        self.assert_qmp(ret, 'count', 0)
-        self.assert_qmp(ret, 'granularity', 65536)
-        self.assert_qmp(ret, 'status', 'active')
-        self.assert_qmp(ret, 'busy', False)
-        self.assert_qmp(ret, 'recording', True)
+        self.assertTrue(self.vm.check_bitmap_status(
+            drive0['id'], bitmap.name, {
+                'count': 0,
+                'granularity': 65536,
+                'status': 'active',
+                'busy': False,
+                'recording': True
+            }))
 
         # Finalize / Cleanup
         self.make_reference_backup(bitmap)
diff --git a/tests/qemu-iotests/257 b/tests/qemu-iotests/257
index c2a72c577a..6218ff20cf 100755
--- a/tests/qemu-iotests/257
+++ b/tests/qemu-iotests/257
@@ -188,25 +188,6 @@  class Drive:
         self.size = size
         self.node = name
 
-def query_bitmaps(vm):
-    res = vm.qmp("query-block")
-    return {"bitmaps": {device['device'] or device['qdev']:
-                        device.get('dirty-bitmaps', []) for
-                        device in res['return']}}
-
-def get_bitmap(bitmaps, drivename, name, recording=None):
-    """
-    get a specific bitmap from the object returned by query_bitmaps.
-    :param recording: If specified, filter results by the specified value.
-    """
-    for bitmap in bitmaps['bitmaps'][drivename]:
-        if bitmap.get('name', '') == name:
-            if recording is None:
-                return bitmap
-            elif bitmap.get('recording') == recording:
-                return bitmap
-    return None
-
 def blockdev_backup(vm, device, target, sync, **kwargs):
     # Strip any arguments explicitly nulled by the caller:
     kwargs = {key: val for key, val in kwargs.items() if val is not None}
@@ -249,8 +230,8 @@  def perform_writes(drive, n):
             pattern.size)
         log(cmd)
         log(drive.vm.hmp_qemu_io(drive.name, cmd))
-    bitmaps = query_bitmaps(drive.vm)
-    log(bitmaps, indent=2)
+    bitmaps = drive.vm.query_bitmaps()
+    log({'bitmaps': bitmaps}, indent=2)
     log('')
     return bitmaps
 
@@ -370,7 +351,7 @@  def test_bitmap_sync(bsync_mode, msync_mode='bitmap', failure=None):
         # 1 - Writes and Reference Backup
         bitmaps = perform_writes(drive0, 1)
         ebitmap.dirty_group(1)
-        bitmap = get_bitmap(bitmaps, drive0.device, 'bitmap0')
+        bitmap = vm.get_bitmap(drive0.node, 'bitmap0', bitmaps=bitmaps)
         ebitmap.compare(bitmap)
         reference_backup(drive0, 1, fbackup1)
 
@@ -388,12 +369,13 @@  def test_bitmap_sync(bsync_mode, msync_mode='bitmap', failure=None):
             log('')
             bitmaps = perform_writes(drive0, 2)
             # Named bitmap (static, should be unchanged)
-            ebitmap.compare(get_bitmap(bitmaps, drive0.device, 'bitmap0'))
+            ebitmap.compare(vm.get_bitmap(drive0.node, 'bitmap0',
+                                          bitmaps=bitmaps))
             # Anonymous bitmap (dynamic, shows new writes)
             anonymous = EmulatedBitmap()
             anonymous.dirty_group(2)
-            anonymous.compare(get_bitmap(bitmaps, drive0.device, '',
-                                         recording=True))
+            anonymous.compare(vm.get_bitmap(drive0.node, '', recording=True,
+                                            bitmaps=bitmaps))
 
             # Simulate the order in which this will happen:
             # group 1 gets cleared first, then group two gets written.
@@ -405,8 +387,8 @@  def test_bitmap_sync(bsync_mode, msync_mode='bitmap', failure=None):
         vm.run_job(job, auto_dismiss=True, auto_finalize=False,
                    pre_finalize=_callback,
                    cancel=(failure == 'simulated'))
-        bitmaps = query_bitmaps(vm)
-        log(bitmaps, indent=2)
+        bitmaps = vm.query_bitmaps()
+        log({'bitmaps': bitmaps}, indent=2)
         log('')
 
         if bsync_mode == 'always' and failure == 'intermediate':
@@ -423,29 +405,30 @@  def test_bitmap_sync(bsync_mode, msync_mode='bitmap', failure=None):
                 ebitmap.clear()
                 ebitmap.dirty_bits(range(fail_bit, SIZE // GRANULARITY))
 
-        ebitmap.compare(get_bitmap(bitmaps, drive0.device, 'bitmap0'))
+        ebitmap.compare(vm.get_bitmap(drive0.node, 'bitmap0', bitmaps=bitmaps))
 
         # 2 - Writes and Reference Backup
         bitmaps = perform_writes(drive0, 3)
         ebitmap.dirty_group(3)
-        ebitmap.compare(get_bitmap(bitmaps, drive0.device, 'bitmap0'))
+        ebitmap.compare(vm.get_bitmap(drive0.node, 'bitmap0', bitmaps=bitmaps))
         reference_backup(drive0, 2, fbackup2)
 
         # 2 - Bitmap Backup (In failure modes, this is a recovery.)
         job = backup(drive0, 2, bsync2, "bitmap",
                      bitmap="bitmap0", bitmap_mode=bsync_mode)
         vm.run_job(job, auto_dismiss=True, auto_finalize=False)
-        bitmaps = query_bitmaps(vm)
-        log(bitmaps, indent=2)
+        bitmaps = vm.query_bitmaps()
+        log({'bitmaps': bitmaps}, indent=2)
         log('')
         if bsync_mode != 'never':
             ebitmap.clear()
-        ebitmap.compare(get_bitmap(bitmaps, drive0.device, 'bitmap0'))
+        ebitmap.compare(vm.get_bitmap(drive0.node, 'bitmap0', bitmaps=bitmaps))
 
         log('--- Cleanup ---\n')
         vm.qmp_log("block-dirty-bitmap-remove",
                    node=drive0.name, name="bitmap0")
-        log(query_bitmaps(vm), indent=2)
+        bitmaps = vm.query_bitmaps()
+        log({'bitmaps': bitmaps}, indent=2)
         vm.shutdown()
         log('')
 
diff --git a/tests/qemu-iotests/257.out b/tests/qemu-iotests/257.out
index 84b79d7bfe..c9b4b68232 100644
--- a/tests/qemu-iotests/257.out
+++ b/tests/qemu-iotests/257.out
@@ -19,9 +19,7 @@  write -P0x6f 0x2000000 0x10000
 write -P0x76 0x3ff0000 0x10000
 {"return": ""}
 {
-  "bitmaps": {
-    "device0": []
-  }
+  "bitmaps": {}
 }
 
 --- Reference Backup #0 ---
@@ -55,7 +53,7 @@  write -P0x69 0x3fe0000 0x10000
 {"return": ""}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 393216,
@@ -111,7 +109,7 @@  write -P0x67 0x3fe0000 0x20000
 {"return": ""}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 0,
@@ -153,7 +151,7 @@  expecting 7 dirty sectors; have 7. OK!
 {"data": {"device": "backup_1", "len": 393216, "offset": 393216, "speed": 0, "type": "backup"}, "event": "BLOCK_JOB_CANCELLED", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 655360,
@@ -182,7 +180,7 @@  write -P0xdd 0x3fc0000 0x10000
 {"return": ""}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 983040,
@@ -231,7 +229,7 @@  expecting 15 dirty sectors; have 15. OK!
 {"data": {"device": "backup_2", "len": 983040, "offset": 983040, "speed": 0, "type": "backup"}, "event": "BLOCK_JOB_COMPLETED", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 983040,
@@ -253,9 +251,7 @@  expecting 15 dirty sectors; have 15. OK!
 {"execute": "block-dirty-bitmap-remove", "arguments": {"name": "bitmap0", "node": "drive0"}}
 {"return": {}}
 {
-  "bitmaps": {
-    "device0": []
-  }
+  "bitmaps": {}
 }
 
 --- Verification ---
@@ -285,9 +281,7 @@  write -P0x6f 0x2000000 0x10000
 write -P0x76 0x3ff0000 0x10000
 {"return": ""}
 {
-  "bitmaps": {
-    "device0": []
-  }
+  "bitmaps": {}
 }
 
 --- Reference Backup #0 ---
@@ -321,7 +315,7 @@  write -P0x69 0x3fe0000 0x10000
 {"return": ""}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 393216,
@@ -370,7 +364,7 @@  expecting 6 dirty sectors; have 6. OK!
 {"data": {"device": "backup_1", "error": "Input/output error", "len": 393216, "offset": 65536, "speed": 0, "type": "backup"}, "event": "BLOCK_JOB_COMPLETED", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 393216,
@@ -399,7 +393,7 @@  write -P0xdd 0x3fc0000 0x10000
 {"return": ""}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 917504,
@@ -448,7 +442,7 @@  expecting 14 dirty sectors; have 14. OK!
 {"data": {"device": "backup_2", "len": 917504, "offset": 917504, "speed": 0, "type": "backup"}, "event": "BLOCK_JOB_COMPLETED", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 917504,
@@ -470,9 +464,7 @@  expecting 14 dirty sectors; have 14. OK!
 {"execute": "block-dirty-bitmap-remove", "arguments": {"name": "bitmap0", "node": "drive0"}}
 {"return": {}}
 {
-  "bitmaps": {
-    "device0": []
-  }
+  "bitmaps": {}
 }
 
 --- Verification ---
@@ -502,9 +494,7 @@  write -P0x6f 0x2000000 0x10000
 write -P0x76 0x3ff0000 0x10000
 {"return": ""}
 {
-  "bitmaps": {
-    "device0": []
-  }
+  "bitmaps": {}
 }
 
 --- Reference Backup #0 ---
@@ -538,7 +528,7 @@  write -P0x69 0x3fe0000 0x10000
 {"return": ""}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 393216,
@@ -594,7 +584,7 @@  write -P0x67 0x3fe0000 0x20000
 {"return": ""}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 0,
@@ -636,7 +626,7 @@  expecting 7 dirty sectors; have 7. OK!
 {"data": {"device": "backup_1", "len": 393216, "offset": 393216, "speed": 0, "type": "backup"}, "event": "BLOCK_JOB_COMPLETED", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 655360,
@@ -665,7 +655,7 @@  write -P0xdd 0x3fc0000 0x10000
 {"return": ""}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 983040,
@@ -714,7 +704,7 @@  expecting 15 dirty sectors; have 15. OK!
 {"data": {"device": "backup_2", "len": 983040, "offset": 983040, "speed": 0, "type": "backup"}, "event": "BLOCK_JOB_COMPLETED", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 983040,
@@ -736,9 +726,7 @@  expecting 15 dirty sectors; have 15. OK!
 {"execute": "block-dirty-bitmap-remove", "arguments": {"name": "bitmap0", "node": "drive0"}}
 {"return": {}}
 {
-  "bitmaps": {
-    "device0": []
-  }
+  "bitmaps": {}
 }
 
 --- Verification ---
@@ -768,9 +756,7 @@  write -P0x6f 0x2000000 0x10000
 write -P0x76 0x3ff0000 0x10000
 {"return": ""}
 {
-  "bitmaps": {
-    "device0": []
-  }
+  "bitmaps": {}
 }
 
 --- Reference Backup #0 ---
@@ -804,7 +790,7 @@  write -P0x69 0x3fe0000 0x10000
 {"return": ""}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 393216,
@@ -860,7 +846,7 @@  write -P0x67 0x3fe0000 0x20000
 {"return": ""}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 0,
@@ -902,7 +888,7 @@  expecting 7 dirty sectors; have 7. OK!
 {"data": {"device": "backup_1", "len": 393216, "offset": 393216, "speed": 0, "type": "backup"}, "event": "BLOCK_JOB_CANCELLED", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 655360,
@@ -931,7 +917,7 @@  write -P0xdd 0x3fc0000 0x10000
 {"return": ""}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 983040,
@@ -980,7 +966,7 @@  expecting 15 dirty sectors; have 15. OK!
 {"data": {"device": "backup_2", "len": 983040, "offset": 983040, "speed": 0, "type": "backup"}, "event": "BLOCK_JOB_COMPLETED", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 0,
@@ -1002,9 +988,7 @@  expecting 0 dirty sectors; have 0. OK!
 {"execute": "block-dirty-bitmap-remove", "arguments": {"name": "bitmap0", "node": "drive0"}}
 {"return": {}}
 {
-  "bitmaps": {
-    "device0": []
-  }
+  "bitmaps": {}
 }
 
 --- Verification ---
@@ -1034,9 +1018,7 @@  write -P0x6f 0x2000000 0x10000
 write -P0x76 0x3ff0000 0x10000
 {"return": ""}
 {
-  "bitmaps": {
-    "device0": []
-  }
+  "bitmaps": {}
 }
 
 --- Reference Backup #0 ---
@@ -1070,7 +1052,7 @@  write -P0x69 0x3fe0000 0x10000
 {"return": ""}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 393216,
@@ -1119,7 +1101,7 @@  expecting 6 dirty sectors; have 6. OK!
 {"data": {"device": "backup_1", "error": "Input/output error", "len": 393216, "offset": 65536, "speed": 0, "type": "backup"}, "event": "BLOCK_JOB_COMPLETED", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 393216,
@@ -1148,7 +1130,7 @@  write -P0xdd 0x3fc0000 0x10000
 {"return": ""}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 917504,
@@ -1197,7 +1179,7 @@  expecting 14 dirty sectors; have 14. OK!
 {"data": {"device": "backup_2", "len": 917504, "offset": 917504, "speed": 0, "type": "backup"}, "event": "BLOCK_JOB_COMPLETED", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 0,
@@ -1219,9 +1201,7 @@  expecting 0 dirty sectors; have 0. OK!
 {"execute": "block-dirty-bitmap-remove", "arguments": {"name": "bitmap0", "node": "drive0"}}
 {"return": {}}
 {
-  "bitmaps": {
-    "device0": []
-  }
+  "bitmaps": {}
 }
 
 --- Verification ---
@@ -1251,9 +1231,7 @@  write -P0x6f 0x2000000 0x10000
 write -P0x76 0x3ff0000 0x10000
 {"return": ""}
 {
-  "bitmaps": {
-    "device0": []
-  }
+  "bitmaps": {}
 }
 
 --- Reference Backup #0 ---
@@ -1287,7 +1265,7 @@  write -P0x69 0x3fe0000 0x10000
 {"return": ""}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 393216,
@@ -1343,7 +1321,7 @@  write -P0x67 0x3fe0000 0x20000
 {"return": ""}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 0,
@@ -1385,7 +1363,7 @@  expecting 7 dirty sectors; have 7. OK!
 {"data": {"device": "backup_1", "len": 393216, "offset": 393216, "speed": 0, "type": "backup"}, "event": "BLOCK_JOB_COMPLETED", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 458752,
@@ -1414,7 +1392,7 @@  write -P0xdd 0x3fc0000 0x10000
 {"return": ""}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 786432,
@@ -1463,7 +1441,7 @@  expecting 12 dirty sectors; have 12. OK!
 {"data": {"device": "backup_2", "len": 786432, "offset": 786432, "speed": 0, "type": "backup"}, "event": "BLOCK_JOB_COMPLETED", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 0,
@@ -1485,9 +1463,7 @@  expecting 0 dirty sectors; have 0. OK!
 {"execute": "block-dirty-bitmap-remove", "arguments": {"name": "bitmap0", "node": "drive0"}}
 {"return": {}}
 {
-  "bitmaps": {
-    "device0": []
-  }
+  "bitmaps": {}
 }
 
 --- Verification ---
@@ -1517,9 +1493,7 @@  write -P0x6f 0x2000000 0x10000
 write -P0x76 0x3ff0000 0x10000
 {"return": ""}
 {
-  "bitmaps": {
-    "device0": []
-  }
+  "bitmaps": {}
 }
 
 --- Reference Backup #0 ---
@@ -1553,7 +1527,7 @@  write -P0x69 0x3fe0000 0x10000
 {"return": ""}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 393216,
@@ -1609,7 +1583,7 @@  write -P0x67 0x3fe0000 0x20000
 {"return": ""}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 0,
@@ -1651,7 +1625,7 @@  expecting 7 dirty sectors; have 7. OK!
 {"data": {"device": "backup_1", "len": 393216, "offset": 393216, "speed": 0, "type": "backup"}, "event": "BLOCK_JOB_CANCELLED", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 458752,
@@ -1680,7 +1654,7 @@  write -P0xdd 0x3fc0000 0x10000
 {"return": ""}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 786432,
@@ -1729,7 +1703,7 @@  expecting 12 dirty sectors; have 12. OK!
 {"data": {"device": "backup_2", "len": 786432, "offset": 786432, "speed": 0, "type": "backup"}, "event": "BLOCK_JOB_COMPLETED", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 0,
@@ -1751,9 +1725,7 @@  expecting 0 dirty sectors; have 0. OK!
 {"execute": "block-dirty-bitmap-remove", "arguments": {"name": "bitmap0", "node": "drive0"}}
 {"return": {}}
 {
-  "bitmaps": {
-    "device0": []
-  }
+  "bitmaps": {}
 }
 
 --- Verification ---
@@ -1783,9 +1755,7 @@  write -P0x6f 0x2000000 0x10000
 write -P0x76 0x3ff0000 0x10000
 {"return": ""}
 {
-  "bitmaps": {
-    "device0": []
-  }
+  "bitmaps": {}
 }
 
 --- Reference Backup #0 ---
@@ -1819,7 +1789,7 @@  write -P0x69 0x3fe0000 0x10000
 {"return": ""}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 393216,
@@ -1868,7 +1838,7 @@  expecting 6 dirty sectors; have 6. OK!
 {"data": {"device": "backup_1", "error": "Input/output error", "len": 393216, "offset": 65536, "speed": 0, "type": "backup"}, "event": "BLOCK_JOB_COMPLETED", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 327680,
@@ -1897,7 +1867,7 @@  write -P0xdd 0x3fc0000 0x10000
 {"return": ""}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 851968,
@@ -1946,7 +1916,7 @@  expecting 13 dirty sectors; have 13. OK!
 {"data": {"device": "backup_2", "len": 851968, "offset": 851968, "speed": 0, "type": "backup"}, "event": "BLOCK_JOB_COMPLETED", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 0,
@@ -1968,9 +1938,7 @@  expecting 0 dirty sectors; have 0. OK!
 {"execute": "block-dirty-bitmap-remove", "arguments": {"name": "bitmap0", "node": "drive0"}}
 {"return": {}}
 {
-  "bitmaps": {
-    "device0": []
-  }
+  "bitmaps": {}
 }
 
 --- Verification ---
@@ -2000,9 +1968,7 @@  write -P0x6f 0x2000000 0x10000
 write -P0x76 0x3ff0000 0x10000
 {"return": ""}
 {
-  "bitmaps": {
-    "device0": []
-  }
+  "bitmaps": {}
 }
 
 --- Reference Backup #0 ---
@@ -2036,7 +2002,7 @@  write -P0x69 0x3fe0000 0x10000
 {"return": ""}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 393216,
@@ -2092,7 +2058,7 @@  write -P0x67 0x3fe0000 0x20000
 {"return": ""}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 0,
@@ -2134,7 +2100,7 @@  expecting 7 dirty sectors; have 7. OK!
 {"data": {"device": "backup_1", "len": 393216, "offset": 393216, "speed": 0, "type": "backup"}, "event": "BLOCK_JOB_COMPLETED", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 458752,
@@ -2163,7 +2129,7 @@  write -P0xdd 0x3fc0000 0x10000
 {"return": ""}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 786432,
@@ -2212,7 +2178,7 @@  expecting 12 dirty sectors; have 12. OK!
 {"data": {"device": "backup_2", "len": 786432, "offset": 786432, "speed": 0, "type": "backup"}, "event": "BLOCK_JOB_COMPLETED", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 0,
@@ -2234,9 +2200,7 @@  expecting 0 dirty sectors; have 0. OK!
 {"execute": "block-dirty-bitmap-remove", "arguments": {"name": "bitmap0", "node": "drive0"}}
 {"return": {}}
 {
-  "bitmaps": {
-    "device0": []
-  }
+  "bitmaps": {}
 }
 
 --- Verification ---
@@ -2266,9 +2230,7 @@  write -P0x6f 0x2000000 0x10000
 write -P0x76 0x3ff0000 0x10000
 {"return": ""}
 {
-  "bitmaps": {
-    "device0": []
-  }
+  "bitmaps": {}
 }
 
 --- Reference Backup #0 ---
@@ -2302,7 +2264,7 @@  write -P0x69 0x3fe0000 0x10000
 {"return": ""}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 393216,
@@ -2358,7 +2320,7 @@  write -P0x67 0x3fe0000 0x20000
 {"return": ""}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 0,
@@ -2400,7 +2362,7 @@  expecting 7 dirty sectors; have 7. OK!
 {"data": {"device": "backup_1", "len": 67108864, "offset": 67108864, "speed": 0, "type": "backup"}, "event": "BLOCK_JOB_CANCELLED", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 655360,
@@ -2429,7 +2391,7 @@  write -P0xdd 0x3fc0000 0x10000
 {"return": ""}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 983040,
@@ -2478,7 +2440,7 @@  expecting 15 dirty sectors; have 15. OK!
 {"data": {"device": "backup_2", "len": 983040, "offset": 983040, "speed": 0, "type": "backup"}, "event": "BLOCK_JOB_COMPLETED", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 0,
@@ -2500,9 +2462,7 @@  expecting 0 dirty sectors; have 0. OK!
 {"execute": "block-dirty-bitmap-remove", "arguments": {"name": "bitmap0", "node": "drive0"}}
 {"return": {}}
 {
-  "bitmaps": {
-    "device0": []
-  }
+  "bitmaps": {}
 }
 
 --- Verification ---
@@ -2532,9 +2492,7 @@  write -P0x6f 0x2000000 0x10000
 write -P0x76 0x3ff0000 0x10000
 {"return": ""}
 {
-  "bitmaps": {
-    "device0": []
-  }
+  "bitmaps": {}
 }
 
 --- Reference Backup #0 ---
@@ -2568,7 +2526,7 @@  write -P0x69 0x3fe0000 0x10000
 {"return": ""}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 393216,
@@ -2617,7 +2575,7 @@  expecting 6 dirty sectors; have 6. OK!
 {"data": {"device": "backup_1", "error": "Input/output error", "len": 67108864, "offset": 983040, "speed": 0, "type": "backup"}, "event": "BLOCK_JOB_COMPLETED", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 393216,
@@ -2646,7 +2604,7 @@  write -P0xdd 0x3fc0000 0x10000
 {"return": ""}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 917504,
@@ -2695,7 +2653,7 @@  expecting 14 dirty sectors; have 14. OK!
 {"data": {"device": "backup_2", "len": 917504, "offset": 917504, "speed": 0, "type": "backup"}, "event": "BLOCK_JOB_COMPLETED", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 0,
@@ -2717,9 +2675,7 @@  expecting 0 dirty sectors; have 0. OK!
 {"execute": "block-dirty-bitmap-remove", "arguments": {"name": "bitmap0", "node": "drive0"}}
 {"return": {}}
 {
-  "bitmaps": {
-    "device0": []
-  }
+  "bitmaps": {}
 }
 
 --- Verification ---
@@ -2749,9 +2705,7 @@  write -P0x6f 0x2000000 0x10000
 write -P0x76 0x3ff0000 0x10000
 {"return": ""}
 {
-  "bitmaps": {
-    "device0": []
-  }
+  "bitmaps": {}
 }
 
 --- Reference Backup #0 ---
@@ -2785,7 +2739,7 @@  write -P0x69 0x3fe0000 0x10000
 {"return": ""}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 393216,
@@ -2841,7 +2795,7 @@  write -P0x67 0x3fe0000 0x20000
 {"return": ""}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 0,
@@ -2883,7 +2837,7 @@  expecting 7 dirty sectors; have 7. OK!
 {"data": {"device": "backup_1", "len": 67108864, "offset": 67108864, "speed": 0, "type": "backup"}, "event": "BLOCK_JOB_COMPLETED", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 458752,
@@ -2912,7 +2866,7 @@  write -P0xdd 0x3fc0000 0x10000
 {"return": ""}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 786432,
@@ -2961,7 +2915,7 @@  expecting 12 dirty sectors; have 12. OK!
 {"data": {"device": "backup_2", "len": 786432, "offset": 786432, "speed": 0, "type": "backup"}, "event": "BLOCK_JOB_COMPLETED", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 0,
@@ -2983,9 +2937,7 @@  expecting 0 dirty sectors; have 0. OK!
 {"execute": "block-dirty-bitmap-remove", "arguments": {"name": "bitmap0", "node": "drive0"}}
 {"return": {}}
 {
-  "bitmaps": {
-    "device0": []
-  }
+  "bitmaps": {}
 }
 
 --- Verification ---
@@ -3015,9 +2967,7 @@  write -P0x6f 0x2000000 0x10000
 write -P0x76 0x3ff0000 0x10000
 {"return": ""}
 {
-  "bitmaps": {
-    "device0": []
-  }
+  "bitmaps": {}
 }
 
 --- Reference Backup #0 ---
@@ -3051,7 +3001,7 @@  write -P0x69 0x3fe0000 0x10000
 {"return": ""}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 393216,
@@ -3107,7 +3057,7 @@  write -P0x67 0x3fe0000 0x20000
 {"return": ""}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 0,
@@ -3149,7 +3099,7 @@  expecting 7 dirty sectors; have 7. OK!
 {"data": {"device": "backup_1", "len": 67108864, "offset": 67108864, "speed": 0, "type": "backup"}, "event": "BLOCK_JOB_CANCELLED", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 458752,
@@ -3178,7 +3128,7 @@  write -P0xdd 0x3fc0000 0x10000
 {"return": ""}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 786432,
@@ -3227,7 +3177,7 @@  expecting 12 dirty sectors; have 12. OK!
 {"data": {"device": "backup_2", "len": 786432, "offset": 786432, "speed": 0, "type": "backup"}, "event": "BLOCK_JOB_COMPLETED", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 0,
@@ -3249,9 +3199,7 @@  expecting 0 dirty sectors; have 0. OK!
 {"execute": "block-dirty-bitmap-remove", "arguments": {"name": "bitmap0", "node": "drive0"}}
 {"return": {}}
 {
-  "bitmaps": {
-    "device0": []
-  }
+  "bitmaps": {}
 }
 
 --- Verification ---
@@ -3281,9 +3229,7 @@  write -P0x6f 0x2000000 0x10000
 write -P0x76 0x3ff0000 0x10000
 {"return": ""}
 {
-  "bitmaps": {
-    "device0": []
-  }
+  "bitmaps": {}
 }
 
 --- Reference Backup #0 ---
@@ -3317,7 +3263,7 @@  write -P0x69 0x3fe0000 0x10000
 {"return": ""}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 393216,
@@ -3366,7 +3312,7 @@  expecting 6 dirty sectors; have 6. OK!
 {"data": {"device": "backup_1", "error": "Input/output error", "len": 67108864, "offset": 983040, "speed": 0, "type": "backup"}, "event": "BLOCK_JOB_COMPLETED", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 66125824,
@@ -3395,7 +3341,7 @@  write -P0xdd 0x3fc0000 0x10000
 {"return": ""}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 66453504,
@@ -3444,7 +3390,7 @@  expecting 1014 dirty sectors; have 1014. OK!
 {"data": {"device": "backup_2", "len": 66453504, "offset": 66453504, "speed": 0, "type": "backup"}, "event": "BLOCK_JOB_COMPLETED", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 0,
@@ -3466,9 +3412,7 @@  expecting 0 dirty sectors; have 0. OK!
 {"execute": "block-dirty-bitmap-remove", "arguments": {"name": "bitmap0", "node": "drive0"}}
 {"return": {}}
 {
-  "bitmaps": {
-    "device0": []
-  }
+  "bitmaps": {}
 }
 
 --- Verification ---
@@ -3498,9 +3442,7 @@  write -P0x6f 0x2000000 0x10000
 write -P0x76 0x3ff0000 0x10000
 {"return": ""}
 {
-  "bitmaps": {
-    "device0": []
-  }
+  "bitmaps": {}
 }
 
 --- Reference Backup #0 ---
@@ -3534,7 +3476,7 @@  write -P0x69 0x3fe0000 0x10000
 {"return": ""}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 393216,
@@ -3590,7 +3532,7 @@  write -P0x67 0x3fe0000 0x20000
 {"return": ""}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 0,
@@ -3632,7 +3574,7 @@  expecting 7 dirty sectors; have 7. OK!
 {"data": {"device": "backup_1", "len": 67108864, "offset": 67108864, "speed": 0, "type": "backup"}, "event": "BLOCK_JOB_COMPLETED", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 458752,
@@ -3661,7 +3603,7 @@  write -P0xdd 0x3fc0000 0x10000
 {"return": ""}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 786432,
@@ -3710,7 +3652,7 @@  expecting 12 dirty sectors; have 12. OK!
 {"data": {"device": "backup_2", "len": 786432, "offset": 786432, "speed": 0, "type": "backup"}, "event": "BLOCK_JOB_COMPLETED", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 0,
@@ -3732,9 +3674,7 @@  expecting 0 dirty sectors; have 0. OK!
 {"execute": "block-dirty-bitmap-remove", "arguments": {"name": "bitmap0", "node": "drive0"}}
 {"return": {}}
 {
-  "bitmaps": {
-    "device0": []
-  }
+  "bitmaps": {}
 }
 
 --- Verification ---
@@ -3764,9 +3704,7 @@  write -P0x6f 0x2000000 0x10000
 write -P0x76 0x3ff0000 0x10000
 {"return": ""}
 {
-  "bitmaps": {
-    "device0": []
-  }
+  "bitmaps": {}
 }
 
 --- Reference Backup #0 ---
@@ -3800,7 +3738,7 @@  write -P0x69 0x3fe0000 0x10000
 {"return": ""}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 393216,
@@ -3856,7 +3794,7 @@  write -P0x67 0x3fe0000 0x20000
 {"return": ""}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 0,
@@ -3898,7 +3836,7 @@  expecting 7 dirty sectors; have 7. OK!
 {"data": {"device": "backup_1", "len": 458752, "offset": 458752, "speed": 0, "type": "backup"}, "event": "BLOCK_JOB_CANCELLED", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 655360,
@@ -3927,7 +3865,7 @@  write -P0xdd 0x3fc0000 0x10000
 {"return": ""}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 983040,
@@ -3976,7 +3914,7 @@  expecting 15 dirty sectors; have 15. OK!
 {"data": {"device": "backup_2", "len": 983040, "offset": 983040, "speed": 0, "type": "backup"}, "event": "BLOCK_JOB_COMPLETED", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 0,
@@ -3998,9 +3936,7 @@  expecting 0 dirty sectors; have 0. OK!
 {"execute": "block-dirty-bitmap-remove", "arguments": {"name": "bitmap0", "node": "drive0"}}
 {"return": {}}
 {
-  "bitmaps": {
-    "device0": []
-  }
+  "bitmaps": {}
 }
 
 --- Verification ---
@@ -4030,9 +3966,7 @@  write -P0x6f 0x2000000 0x10000
 write -P0x76 0x3ff0000 0x10000
 {"return": ""}
 {
-  "bitmaps": {
-    "device0": []
-  }
+  "bitmaps": {}
 }
 
 --- Reference Backup #0 ---
@@ -4066,7 +4000,7 @@  write -P0x69 0x3fe0000 0x10000
 {"return": ""}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 393216,
@@ -4115,7 +4049,7 @@  expecting 6 dirty sectors; have 6. OK!
 {"data": {"device": "backup_1", "error": "Input/output error", "len": 458752, "offset": 65536, "speed": 0, "type": "backup"}, "event": "BLOCK_JOB_COMPLETED", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 393216,
@@ -4144,7 +4078,7 @@  write -P0xdd 0x3fc0000 0x10000
 {"return": ""}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 917504,
@@ -4193,7 +4127,7 @@  expecting 14 dirty sectors; have 14. OK!
 {"data": {"device": "backup_2", "len": 917504, "offset": 917504, "speed": 0, "type": "backup"}, "event": "BLOCK_JOB_COMPLETED", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 0,
@@ -4215,9 +4149,7 @@  expecting 0 dirty sectors; have 0. OK!
 {"execute": "block-dirty-bitmap-remove", "arguments": {"name": "bitmap0", "node": "drive0"}}
 {"return": {}}
 {
-  "bitmaps": {
-    "device0": []
-  }
+  "bitmaps": {}
 }
 
 --- Verification ---
@@ -4247,9 +4179,7 @@  write -P0x6f 0x2000000 0x10000
 write -P0x76 0x3ff0000 0x10000
 {"return": ""}
 {
-  "bitmaps": {
-    "device0": []
-  }
+  "bitmaps": {}
 }
 
 --- Reference Backup #0 ---
@@ -4283,7 +4213,7 @@  write -P0x69 0x3fe0000 0x10000
 {"return": ""}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 393216,
@@ -4339,7 +4269,7 @@  write -P0x67 0x3fe0000 0x20000
 {"return": ""}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 0,
@@ -4381,7 +4311,7 @@  expecting 7 dirty sectors; have 7. OK!
 {"data": {"device": "backup_1", "len": 458752, "offset": 458752, "speed": 0, "type": "backup"}, "event": "BLOCK_JOB_COMPLETED", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 458752,
@@ -4410,7 +4340,7 @@  write -P0xdd 0x3fc0000 0x10000
 {"return": ""}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 786432,
@@ -4459,7 +4389,7 @@  expecting 12 dirty sectors; have 12. OK!
 {"data": {"device": "backup_2", "len": 786432, "offset": 786432, "speed": 0, "type": "backup"}, "event": "BLOCK_JOB_COMPLETED", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 0,
@@ -4481,9 +4411,7 @@  expecting 0 dirty sectors; have 0. OK!
 {"execute": "block-dirty-bitmap-remove", "arguments": {"name": "bitmap0", "node": "drive0"}}
 {"return": {}}
 {
-  "bitmaps": {
-    "device0": []
-  }
+  "bitmaps": {}
 }
 
 --- Verification ---
@@ -4513,9 +4441,7 @@  write -P0x6f 0x2000000 0x10000
 write -P0x76 0x3ff0000 0x10000
 {"return": ""}
 {
-  "bitmaps": {
-    "device0": []
-  }
+  "bitmaps": {}
 }
 
 --- Reference Backup #0 ---
@@ -4549,7 +4475,7 @@  write -P0x69 0x3fe0000 0x10000
 {"return": ""}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 393216,
@@ -4605,7 +4531,7 @@  write -P0x67 0x3fe0000 0x20000
 {"return": ""}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 0,
@@ -4647,7 +4573,7 @@  expecting 7 dirty sectors; have 7. OK!
 {"data": {"device": "backup_1", "len": 458752, "offset": 458752, "speed": 0, "type": "backup"}, "event": "BLOCK_JOB_CANCELLED", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 458752,
@@ -4676,7 +4602,7 @@  write -P0xdd 0x3fc0000 0x10000
 {"return": ""}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 786432,
@@ -4725,7 +4651,7 @@  expecting 12 dirty sectors; have 12. OK!
 {"data": {"device": "backup_2", "len": 786432, "offset": 786432, "speed": 0, "type": "backup"}, "event": "BLOCK_JOB_COMPLETED", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 0,
@@ -4747,9 +4673,7 @@  expecting 0 dirty sectors; have 0. OK!
 {"execute": "block-dirty-bitmap-remove", "arguments": {"name": "bitmap0", "node": "drive0"}}
 {"return": {}}
 {
-  "bitmaps": {
-    "device0": []
-  }
+  "bitmaps": {}
 }
 
 --- Verification ---
@@ -4779,9 +4703,7 @@  write -P0x6f 0x2000000 0x10000
 write -P0x76 0x3ff0000 0x10000
 {"return": ""}
 {
-  "bitmaps": {
-    "device0": []
-  }
+  "bitmaps": {}
 }
 
 --- Reference Backup #0 ---
@@ -4815,7 +4737,7 @@  write -P0x69 0x3fe0000 0x10000
 {"return": ""}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 393216,
@@ -4864,7 +4786,7 @@  expecting 6 dirty sectors; have 6. OK!
 {"data": {"device": "backup_1", "error": "Input/output error", "len": 458752, "offset": 65536, "speed": 0, "type": "backup"}, "event": "BLOCK_JOB_COMPLETED", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 393216,
@@ -4893,7 +4815,7 @@  write -P0xdd 0x3fc0000 0x10000
 {"return": ""}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 917504,
@@ -4942,7 +4864,7 @@  expecting 14 dirty sectors; have 14. OK!
 {"data": {"device": "backup_2", "len": 917504, "offset": 917504, "speed": 0, "type": "backup"}, "event": "BLOCK_JOB_COMPLETED", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 0,
@@ -4964,9 +4886,7 @@  expecting 0 dirty sectors; have 0. OK!
 {"execute": "block-dirty-bitmap-remove", "arguments": {"name": "bitmap0", "node": "drive0"}}
 {"return": {}}
 {
-  "bitmaps": {
-    "device0": []
-  }
+  "bitmaps": {}
 }
 
 --- Verification ---
@@ -4996,9 +4916,7 @@  write -P0x6f 0x2000000 0x10000
 write -P0x76 0x3ff0000 0x10000
 {"return": ""}
 {
-  "bitmaps": {
-    "device0": []
-  }
+  "bitmaps": {}
 }
 
 --- Reference Backup #0 ---
@@ -5032,7 +4950,7 @@  write -P0x69 0x3fe0000 0x10000
 {"return": ""}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 393216,
@@ -5088,7 +5006,7 @@  write -P0x67 0x3fe0000 0x20000
 {"return": ""}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 0,
@@ -5130,7 +5048,7 @@  expecting 7 dirty sectors; have 7. OK!
 {"data": {"device": "backup_1", "len": 458752, "offset": 458752, "speed": 0, "type": "backup"}, "event": "BLOCK_JOB_COMPLETED", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 458752,
@@ -5159,7 +5077,7 @@  write -P0xdd 0x3fc0000 0x10000
 {"return": ""}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 786432,
@@ -5208,7 +5126,7 @@  expecting 12 dirty sectors; have 12. OK!
 {"data": {"device": "backup_2", "len": 786432, "offset": 786432, "speed": 0, "type": "backup"}, "event": "BLOCK_JOB_COMPLETED", "timestamp": {"microseconds": "USECS", "seconds": "SECS"}}
 {
   "bitmaps": {
-    "device0": [
+    "drive0": [
       {
         "busy": false,
         "count": 0,
@@ -5230,9 +5148,7 @@  expecting 0 dirty sectors; have 0. OK!
 {"execute": "block-dirty-bitmap-remove", "arguments": {"name": "bitmap0", "node": "drive0"}}
 {"return": {}}
 {
-  "bitmaps": {
-    "device0": []
-  }
+  "bitmaps": {}
 }
 
 --- Verification ---
diff --git a/tests/qemu-iotests/iotests.py b/tests/qemu-iotests/iotests.py
index 84438e837c..1906eb72f3 100644
--- a/tests/qemu-iotests/iotests.py
+++ b/tests/qemu-iotests/iotests.py
@@ -643,6 +643,33 @@  class VM(qtest.QEMUQtestMachine):
                 return x
         return None
 
+    def query_bitmaps(self):
+        res = self.qmp("query-named-block-nodes")
+        return {device['node-name']: device['dirty-bitmaps']
+                for device in res['return'] if 'dirty-bitmaps' in device}
+
+    def get_bitmap(self, node_name, bitmap_name, recording=None, bitmaps=None):
+        """
+        get a specific bitmap from the object returned by query_bitmaps.
+        :param recording: If specified, filter results by the specified value.
+        :param bitmaps: If specified, use it instead of call query_bitmaps()
+        """
+        if bitmaps is None:
+            bitmaps = self.query_bitmaps()
+
+        for bitmap in bitmaps[node_name]:
+            if bitmap.get('name', '') == bitmap_name:
+                if recording is None:
+                    return bitmap
+                elif bitmap.get('recording') == recording:
+                    return bitmap
+        return None
+
+    def check_bitmap_status(self, node_name, bitmap_name, fields):
+        ret = self.get_bitmap(node_name, bitmap_name)
+
+        return fields.items() <= ret.items()
+
 
 index_re = re.compile(r'([^\[]+)\[([^\]]+)\]')