From patchwork Mon Jul 13 21:36:43 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrey Shinkevich X-Patchwork-Id: 11661087 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id C48A760D for ; Mon, 13 Jul 2020 21:37:41 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id A51FD2082F for ; Mon, 13 Jul 2020 21:37:41 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A51FD2082F Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=virtuozzo.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Received: from localhost ([::1]:58754 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jv68q-0004MO-Ui for patchwork-qemu-devel@patchwork.kernel.org; Mon, 13 Jul 2020 17:37:40 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:40470) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jv683-0002vt-Qs; Mon, 13 Jul 2020 17:36:51 -0400 Received: from relay.sw.ru ([185.231.240.75]:52856 helo=relay3.sw.ru) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jv680-00052H-00; Mon, 13 Jul 2020 17:36:51 -0400 Received: from [172.16.25.136] (helo=localhost.sw.ru) by relay3.sw.ru with esmtp (Exim 4.93) (envelope-from ) id 1jv67m-0000E2-Sd; Tue, 14 Jul 2020 00:36:34 +0300 From: Andrey Shinkevich To: qemu-block@nongnu.org Subject: [PATCH v10 10/10] qcow2_format.py: support dumping metadata in JSON format Date: Tue, 14 Jul 2020 00:36:43 +0300 Message-Id: <1594676203-436999-11-git-send-email-andrey.shinkevich@virtuozzo.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1594676203-436999-1-git-send-email-andrey.shinkevich@virtuozzo.com> References: <1594676203-436999-1-git-send-email-andrey.shinkevich@virtuozzo.com> Received-SPF: pass client-ip=185.231.240.75; envelope-from=andrey.shinkevich@virtuozzo.com; helo=relay3.sw.ru X-detected-operating-system: by eggs.gnu.org: First seen = 2020/07/13 17:36:45 X-ACL-Warn: Detected OS = Linux 3.11 and newer X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kwolf@redhat.com, vsementsov@virtuozzo.com, qemu-devel@nongnu.org, mreitz@redhat.com, andrey.shinkevich@virtuozzo.com, den@openvz.org Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" Implementation of dumping QCOW2 image metadata. The sample output: { "Header_extensions": [ { "name": "Feature table", "magic": 1745090647, "length": 192, "data_str": "" }, { "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 Signed-off-by: Andrey Shinkevich --- tests/qemu-iotests/qcow2_format.py | 59 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 59 insertions(+) diff --git a/tests/qemu-iotests/qcow2_format.py b/tests/qemu-iotests/qcow2_format.py index 83c3482..a263858 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, 'get_fields_dict'): + return obj.get_fields_dict() + else: + return json.JSONEncoder.default(self, obj) class Qcow2Field: @@ -112,6 +121,11 @@ class Qcow2Struct(metaclass=Qcow2StructMeta): self.fields_dict = self.__dict__.copy() def dump(self, dump_json=None): + if dump_json: + print(json.dumps(self.get_fields_dict(), indent=4, + cls=ComplexEncoder)) + return + for f in self.fields: value = self.__dict__[f[2]] if isinstance(f[1], str): @@ -154,6 +168,9 @@ class Qcow2BitmapExt(Qcow2Struct): print() entry.dump() + def get_fields_dict(self): + return self.fields_dict + class Qcow2BitmapDirEntry(Qcow2Struct): @@ -199,6 +216,11 @@ class Qcow2BitmapDirEntry(Qcow2Struct): super(Qcow2BitmapDirEntry, self).dump() self.bitmap_table.dump() + def get_fields_dict(self): + bmp_name = dict(name=self.name) + bme_dict = {**bmp_name, **self.fields_dict} + return bme_dict + class Qcow2BitmapTableEntry: @@ -214,6 +236,9 @@ class Qcow2BitmapTableEntry: else: self.type = 'all-zeroes' + def get_fields_dict(self): + return dict(type=self.type, offset=self.offset) + class Qcow2BitmapTable: @@ -230,6 +255,18 @@ class Qcow2BitmapTable: for i, entry in bitmap_table: print(f'{i:<14} {entry.type:<15} {entry.offset:<24} {size}') + def get_fields_dict(self): + return dict(entries=self.entries) + + +class Qcow2HeaderExtensionsDoc: + + def __init__(self, extensions): + self.extensions = extensions + + def get_fields_dict(self): + return dict(Header_extensions=self.extensions) + QCOW2_EXT_MAGIC_BITMAPS = 0x23852875 @@ -245,6 +282,9 @@ class QcowHeaderExtension(Qcow2Struct): 0x44415441: 'Data file' } + def get_fields_dict(self): + return self.mapping.get(self.value, "") + fields = ( ('u32', Magic, 'magic'), ('u32', '{}', 'length') @@ -303,6 +343,16 @@ class QcowHeaderExtension(Qcow2Struct): else: self.obj.dump(dump_json) + def get_fields_dict(self): + ext_name = dict(name=self.Magic(self.magic)) + he_dict = {**ext_name, **self.fields_dict} + if self.obj is not None: + he_dict.update(data=self.obj) + else: + he_dict.update(data_str=self.data_str) + + return he_dict + @classmethod def create(cls, magic, data): return QcowHeaderExtension(magic, len(data), data) @@ -401,7 +451,16 @@ class QcowHeader(Qcow2Struct): fd.write(buf) def dump_extensions(self, dump_json=None): + if dump_json: + ext_doc = Qcow2HeaderExtensionsDoc(self.extensions) + print(json.dumps(ext_doc.get_fields_dict(), indent=4, + cls=ComplexEncoder)) + return + for ex in self.extensions: print('Header extension:') ex.dump(dump_json) print() + + def get_fields_dict(self): + return self.fields_dict