From patchwork Thu Aug 6 19:35:53 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrey Shinkevich X-Patchwork-Id: 11704481 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 063AA138A for ; Thu, 6 Aug 2020 20:25:56 +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 042B120748 for ; Thu, 6 Aug 2020 20:25:56 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 042B120748 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]:50622 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1k3mSZ-0006Az-5L for patchwork-qemu-devel@patchwork.kernel.org; Thu, 06 Aug 2020 16:25:55 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:47494) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1k3lgO-0002PT-8D; Thu, 06 Aug 2020 15:36:08 -0400 Received: from relay.sw.ru ([185.231.240.75]:56481 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 1k3lgK-0000Kr-5A; Thu, 06 Aug 2020 15:36:07 -0400 Received: from [172.16.25.136] (helo=localhost.sw.ru) by relay3.sw.ru with esmtp (Exim 4.93) (envelope-from ) id 1k3lgB-0003k9-VR; Thu, 06 Aug 2020 22:35:55 +0300 From: Andrey Shinkevich To: qemu-block@nongnu.org Subject: [PATCH v13 07/11] qcow2_format.py: Dump bitmap table serialized entries Date: Thu, 6 Aug 2020 22:35:53 +0300 Message-Id: <1596742557-320265-8-git-send-email-andrey.shinkevich@virtuozzo.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1596742557-320265-1-git-send-email-andrey.shinkevich@virtuozzo.com> References: <1596742557-320265-1-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 = 2020/08/06 15:35:59 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+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" Add bitmap table information to the QCOW2 metadata dump. Bitmap name bitmap-1 ... Bitmap table type size offset 0 serialized 65536 10092544 1 all-zeroes 0 0 2 all-zeroes 0 0 Signed-off-by: Andrey Shinkevich Reviewed-by: Vladimir Sementsov-Ogievskiy --- tests/qemu-iotests/303.out | 4 +++ tests/qemu-iotests/qcow2_format.py | 50 ++++++++++++++++++++++++++++++++++++++ 2 files changed, 54 insertions(+) diff --git a/tests/qemu-iotests/303.out b/tests/qemu-iotests/303.out index 038ba93..70828e0 100644 --- a/tests/qemu-iotests/303.out +++ b/tests/qemu-iotests/303.out @@ -66,6 +66,8 @@ type 1 granularity_bits 15 name_size 8 extra_data_size 0 +Bitmap table type size offset +0 serialized 65536 10092544 Bitmap name bitmap-2 bitmap_table_offset 0x9c0000 @@ -75,4 +77,6 @@ type 1 granularity_bits 16 name_size 8 extra_data_size 0 +Bitmap table type size offset +0 all-zeroes 0 0 diff --git a/tests/qemu-iotests/qcow2_format.py b/tests/qemu-iotests/qcow2_format.py index ca0d350..574249b 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 = self.bitmap_dir_entry_raw_size() padding = ((entry_raw_size + 7) & ~7) - entry_raw_size fd.seek(padding, 1) + self.bitmap_table = Qcow2BitmapTable(fd=fd, + offset=self.bitmap_table_offset, + nb_entries=self.bitmap_table_size, + cluster_size=self.cluster_size) def bitmap_dir_entry_raw_size(self): return struct.calcsize(self.fmt) + self.name_size + \ @@ -183,6 +187,52 @@ class Qcow2BitmapDirEntry(Qcow2Struct): def dump(self): print(f'{"Bitmap name":<25} {self.name}') super(Qcow2BitmapDirEntry, self).dump() + self.bitmap_table.dump() + + +class Qcow2BitmapTableEntry(Qcow2Struct): + + fields = ( + ('u64', '{}', 'entry'), + ) + + BME_TABLE_ENTRY_RESERVED_MASK = 0xff000000000001fe + BME_TABLE_ENTRY_OFFSET_MASK = 0x00fffffffffffe00 + BME_TABLE_ENTRY_FLAG_ALL_ONES = 1 + + def __init__(self, fd): + super().__init__(fd=fd) + self.reserved = self.entry & self.BME_TABLE_ENTRY_RESERVED_MASK + self.offset = self.entry & self.BME_TABLE_ENTRY_OFFSET_MASK + if self.offset: + if self.entry & self.BME_TABLE_ENTRY_FLAG_ALL_ONES: + self.type = 'invalid' + else: + self.type = 'serialized' + elif self.entry & self.BME_TABLE_ENTRY_FLAG_ALL_ONES: + self.type = 'all-ones' + else: + self.type = 'all-zeroes' + + +class Qcow2BitmapTable: + + def __init__(self, fd, offset, nb_entries, cluster_size): + self.cluster_size = cluster_size + position = fd.tell() + fd.seek(offset) + self.entries = [Qcow2BitmapTableEntry(fd) for _ in range(nb_entries)] + fd.seek(position) + + def dump(self): + bitmap_table = enumerate(self.entries) + print(f'{"Bitmap table":<14} {"type":<15} {"size":<12} {"offset"}') + for i, entry in bitmap_table: + if entry.type == 'serialized': + size = self.cluster_size + else: + size = 0 + print(f'{i:<14} {entry.type:<15} {size:<12} {entry.offset}') QCOW2_EXT_MAGIC_BITMAPS = 0x23852875