From nobody Tue Feb 10 11:56:16 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=virtuozzo.com ARC-Seal: i=1; a=rsa-sha256; t=1594973988; cv=none; d=zohomail.com; s=zohoarc; b=NnWzguF0AVGDwh3mII3hX/LxerSYfBzlCdjkcr+ku8lsA1zZqqEFvZ7D/DlNzES0/9xn+pOdOxKG3VbfmqOo7SJhGWTb50TAi+sPWtNzoCqwIMCMFv1vxibdSA4X1lRrFps47vOtOM2cMrpG9ecudrD1KhyLyikm0mt9TxrTpPs= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1594973988; h=Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:Message-ID:References:Sender:Subject:To; bh=UYQrDLXj7tFsDnJp2Pg2oca7DDprung3pQwg3tU8b8A=; b=VMrLVIBSKxz7J5EdENLv/DRdp6LhWc7m4ugHq9QOR3RFAP46dacnHmQusYIgDMUCO1nIguGsrVyBgsTZCEJF4waP681zgK5xSFQ/JQtD1sYN7/XtovYvzUEPjO1Vm5WT4Mr6G6/Nx5IrI57l6oHM0Kj87OxmvrU9E8XwrqPe1ws= ARC-Authentication-Results: i=1; mx.zohomail.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail header.from= (p=none dis=none) header.from= Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1594973988178560.0877363745551; Fri, 17 Jul 2020 01:19:48 -0700 (PDT) Received: from localhost ([::1]:58130 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jwLas-0001xs-Lc for importer@patchew.org; Fri, 17 Jul 2020 04:19:46 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:60452) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jwLWQ-0001rn-Mm; Fri, 17 Jul 2020 04:15:11 -0400 Received: from relay.sw.ru ([185.231.240.75]:49990 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 1jwLWK-0007JS-G1; Fri, 17 Jul 2020 04:15:10 -0400 Received: from [172.16.25.136] (helo=localhost.sw.ru) by relay3.sw.ru with esmtp (Exim 4.93) (envelope-from ) id 1jwLWC-0003cP-Nr; Fri, 17 Jul 2020 11:14:56 +0300 From: Andrey Shinkevich To: qemu-block@nongnu.org Subject: [PATCH v11 07/11] qcow2_format.py: Dump bitmap table serialized entries Date: Fri, 17 Jul 2020 11:14:55 +0300 Message-Id: <1594973699-781898-8-git-send-email-andrey.shinkevich@virtuozzo.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1594973699-781898-1-git-send-email-andrey.shinkevich@virtuozzo.com> References: <1594973699-781898-1-git-send-email-andrey.shinkevich@virtuozzo.com> Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; 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 = 2020/07/17 04:15:01 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, URIBL_BLOCKED=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+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Add bitmap table information to the QCOW2 metadata dump. Bitmap name bitmap-1 ... Bitmap table type offset size 0 serialized 4718592 65536 1 serialized 4294967296 65536 2 serialized 5348033147437056 65536 3 serialized 13792273858822144 65536 4 serialized 4718592 65536 5 serialized 4294967296 65536 6 serialized 4503608217305088 65536 7 serialized 14073748835532800 65536 Signed-off-by: Andrey Shinkevich --- tests/qemu-iotests/qcow2_format.py | 41 ++++++++++++++++++++++++++++++++++= ++++ 1 file changed, 41 insertions(+) diff --git a/tests/qemu-iotests/qcow2_format.py b/tests/qemu-iotests/qcow2_= format.py index ca0d350..ad1918c 100644 --- a/tests/qemu-iotests/qcow2_format.py +++ b/tests/qemu-iotests/qcow2_format.py @@ -175,6 +175,10 @@ class Qcow2BitmapDirEntry(Qcow2Struct): entry_raw_size =3D self.bitmap_dir_entry_raw_size() padding =3D ((entry_raw_size + 7) & ~7) - entry_raw_size fd.seek(padding, 1) + self.bitmap_table =3D Qcow2BitmapTable(fd=3Dfd, + offset=3Dself.bitmap_table_of= fset, + size=3Dself.bitmap_table_size, + cluster_size=3Dself.cluster_s= ize) =20 def bitmap_dir_entry_raw_size(self): return struct.calcsize(self.fmt) + self.name_size + \ @@ -183,6 +187,43 @@ class Qcow2BitmapDirEntry(Qcow2Struct): def dump(self): print(f'{"Bitmap name":<25} {self.name}') super(Qcow2BitmapDirEntry, self).dump() + self.bitmap_table.dump() + + +class Qcow2BitmapTableEntry: + + BME_TABLE_ENTRY_OFFSET_MASK =3D 0x00fffffffffffe00 + BME_TABLE_ENTRY_FLAG_ALL_ONES =3D 1 + + def __init__(self, entry): + self.offset =3D entry & self.BME_TABLE_ENTRY_OFFSET_MASK + if self.offset: + self.type =3D 'serialized' + elif entry & self.BME_TABLE_ENTRY_FLAG_ALL_ONES: + self.type =3D 'all-ones' + else: + self.type =3D 'all-zeroes' + + +class Qcow2BitmapTable: + + def __init__(self, fd, offset, size, cluster_size): + self.entries =3D [] + self.cluster_size =3D cluster_size + table_size =3D size * 8 + position =3D fd.tell() + fd.seek(offset) + table =3D [e[0] for e in struct.iter_unpack('>Q', fd.read(table_si= ze))] + fd.seek(position) + for entry in table: + self.entries.append(Qcow2BitmapTableEntry(entry)) + + def dump(self): + size =3D self.cluster_size + bitmap_table =3D enumerate(self.entries) + print(f'{"Bitmap table":<14} {"type":<15} {"offset":<24} {"size"}') + for i, entry in bitmap_table: + print(f'{i:<14} {entry.type:<15} {entry.offset:<24} {size}') =20 =20 QCOW2_EXT_MAGIC_BITMAPS =3D 0x23852875 --=20 1.8.3.1