| Message ID | 1594973699-781898-12-git-send-email-andrey.shinkevich@virtuozzo.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | iotests: Dump QCOW2 dirty bitmaps metadata | expand |
17.07.2020 11:14, Andrey Shinkevich wrote: > Implementation of dumping QCOW2 image metadata. > The sample output: > { > "Header_extensions": [ > { > "name": "Feature table", > "magic": 1745090647, > "length": 192, > "data_str": "<binary>" > }, > { > "name": "Bitmaps", > "magic": 595929205, > "length": 24, > "data": { > "nb_bitmaps": 2, > "reserved32": 0, > "bitmap_directory_size": 64, > "bitmap_directory_offset": 1048576, > "bitmap_directory": [ bitmap_directy is just a list of dicts.. > { > "name": "bitmap-1", > "bitmap_table_offset": 589824, > "bitmap_table_size": 1, > "flags": 2, > "type": 1, > "granularity_bits": 15, > "name_size": 8, > "extra_data_size": 0, > "bitmap_table": { .. can bitmap_table be just a list of dicts as well, not {entries: <list of dicts>} ? > "entries": [ > { > "type": "serialized", > "offset": 655360 > }, > ... > > Suggested-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> > Signed-off-by: Andrey Shinkevich <andrey.shinkevich@virtuozzo.com> > --- > tests/qemu-iotests/qcow2_format.py | 20 ++++++++++++++++++++ > 1 file changed, 20 insertions(+) > > diff --git a/tests/qemu-iotests/qcow2_format.py b/tests/qemu-iotests/qcow2_format.py > index d2a8659..d40eb49 100644 > --- a/tests/qemu-iotests/qcow2_format.py > +++ b/tests/qemu-iotests/qcow2_format.py > @@ -19,6 +19,15 @@ > > import struct > import string > +import json > + > + > +class ComplexEncoder(json.JSONEncoder): > + def default(self, obj): > + if hasattr(obj, 'to_dict'): > + return obj.to_dict() > + else: > + return json.JSONEncoder.default(self, obj) > > > class Qcow2Field: > @@ -110,6 +119,11 @@ class Qcow2Struct(metaclass=Qcow2StructMeta): > for i, field in enumerate(self.fields)) > > def dump(self, is_json=False): > + if is_json: > + print(json.dumps(self.to_dict(), indent=4, > + cls=ComplexEncoder)) > + return > + > for f in self.fields: > value = self.__dict__[f[2]] > if isinstance(f[1], str): > @@ -445,6 +459,12 @@ class QcowHeader(Qcow2Struct): > fd.write(buf) > > def dump_extensions(self, is_json=False): > + if is_json: > + ext_doc = Qcow2HeaderExtensionsDoc(self.extensions) > + print(json.dumps(ext_doc.to_dict(), indent=4, > + cls=ComplexEncoder)) > + return I'd prefer to get rid of Qcow2HeaderExtensionsDoc. Could we just do something like json.dumps(self.extensions, indent=4, cls=ComplexEncoder) ? > + > for ex in self.extensions: > print('Header extension:') > ex.dump() >
diff --git a/tests/qemu-iotests/qcow2_format.py b/tests/qemu-iotests/qcow2_format.py index d2a8659..d40eb49 100644 --- a/tests/qemu-iotests/qcow2_format.py +++ b/tests/qemu-iotests/qcow2_format.py @@ -19,6 +19,15 @@ import struct import string +import json + + +class ComplexEncoder(json.JSONEncoder): + def default(self, obj): + if hasattr(obj, 'to_dict'): + return obj.to_dict() + else: + return json.JSONEncoder.default(self, obj) class Qcow2Field: @@ -110,6 +119,11 @@ class Qcow2Struct(metaclass=Qcow2StructMeta): for i, field in enumerate(self.fields)) def dump(self, is_json=False): + if is_json: + print(json.dumps(self.to_dict(), indent=4, + cls=ComplexEncoder)) + return + for f in self.fields: value = self.__dict__[f[2]] if isinstance(f[1], str): @@ -445,6 +459,12 @@ class QcowHeader(Qcow2Struct): fd.write(buf) def dump_extensions(self, is_json=False): + if is_json: + ext_doc = Qcow2HeaderExtensionsDoc(self.extensions) + print(json.dumps(ext_doc.to_dict(), indent=4, + cls=ComplexEncoder)) + return + for ex in self.extensions: print('Header extension:') ex.dump()
Implementation of dumping QCOW2 image metadata. The sample output: { "Header_extensions": [ { "name": "Feature table", "magic": 1745090647, "length": 192, "data_str": "<binary>" }, { "name": "Bitmaps", "magic": 595929205, "length": 24, "data": { "nb_bitmaps": 2, "reserved32": 0, "bitmap_directory_size": 64, "bitmap_directory_offset": 1048576, "bitmap_directory": [ { "name": "bitmap-1", "bitmap_table_offset": 589824, "bitmap_table_size": 1, "flags": 2, "type": 1, "granularity_bits": 15, "name_size": 8, "extra_data_size": 0, "bitmap_table": { "entries": [ { "type": "serialized", "offset": 655360 }, ... Suggested-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Signed-off-by: Andrey Shinkevich <andrey.shinkevich@virtuozzo.com> --- tests/qemu-iotests/qcow2_format.py | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+)