From patchwork Fri Dec 27 11:43:58 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrey Shinkevich X-Patchwork-Id: 1215675 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=virtuozzo.com 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 ozlabs.org (Postfix) with ESMTPS id 47klP53sQKz9sPK for ; Fri, 27 Dec 2019 22:44:55 +1100 (AEDT) Received: from localhost ([::1]:34154 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iko33-0007gx-5Q for incoming@patchwork.ozlabs.org; Fri, 27 Dec 2019 06:44:53 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:37109) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iko2U-0007Yp-RZ for qemu-devel@nongnu.org; Fri, 27 Dec 2019 06:44:20 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iko2S-0007Pf-H7 for qemu-devel@nongnu.org; Fri, 27 Dec 2019 06:44:18 -0500 Received: from relay.sw.ru ([185.231.240.75]:58014) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1iko2P-0007JA-4K; Fri, 27 Dec 2019 06:44:13 -0500 Received: from dhcp-172-16-25-136.sw.ru ([172.16.25.136] helo=localhost.sw.ru) by relay.sw.ru with esmtp (Exim 4.92.3) (envelope-from ) id 1iko2C-0001wk-FX; Fri, 27 Dec 2019 14:44:00 +0300 From: Andrey Shinkevich To: qemu-block@nongnu.org Subject: [PATCH 1/2] qcow2: introduce Qcow2Metadata structure Date: Fri, 27 Dec 2019 14:43:58 +0300 Message-Id: <1577447039-400109-2-git-send-email-andrey.shinkevich@virtuozzo.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1577447039-400109-1-git-send-email-andrey.shinkevich@virtuozzo.com> References: <1577447039-400109-1-git-send-email-andrey.shinkevich@virtuozzo.com> X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [fuzzy] X-Received-From: 185.231.240.75 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, armbru@redhat.com, qemu-devel@nongnu.org, andrey.shinkevich@virtuozzo.com, den@openvz.org, mreitz@redhat.com Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" The preliminary patch to provide an extendable structure for dumping QCOW2 metadata allocations in image. Suggested-by: Vladimir Sementsov-Ogievskiy Signed-off-by: Andrey Shinkevich --- qapi/block-core.json | 208 ++++++++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 207 insertions(+), 1 deletion(-) diff --git a/qapi/block-core.json b/qapi/block-core.json index 0cf68fe..3eaac13 100644 --- a/qapi/block-core.json +++ b/qapi/block-core.json @@ -176,6 +176,209 @@ '*backing-image': 'ImageInfo', '*format-specific': 'ImageInfoSpecific' } } + +## +# @Qcow2Metadata: +# +# Encapsulates QCOW2 metadata information +# +# @qcow2-header: QCOW2 header info +# +# @active-l1: L1 active table info +# +# @refcount-table: refcount table info +# +# @crypt-header: encryption header info +# +# @bitmaps: bitmap tables info +# +# @snapshot-table: snapshot tables info +# +# Since: 5.0 +## +{ 'struct': 'Qcow2Metadata', + 'data': { 'qcow2-header': 'Qcow2Header', + 'refcount-table': 'Qcow2RefcountTable', + 'active-l1': 'Qcow2L1Table', + '*crypt-header': 'Qcow2EncryptionHeader', + '*bitmaps': 'Qcow2Bitmaps', + '*snapshot-table': 'Qcow2SnapshotsTable' } } + +## +# @Qcow2Header: +# +# QCOW2 header information +# +# @version: version number +# +# @location: header offset and size in image +# +# Since: 5.0 +## +{ 'struct': 'Qcow2Header', + 'data': {'version': 'int', + 'location': 'Qcow2Allocation' } } + +## +# @Qcow2EncryptionHeader: +# +# QCOW2 encryption header information +# +# @location: header offset and size in image +# +# Since: 5.0 +## +{ 'struct': 'Qcow2EncryptionHeader', + 'data': {'location': 'Qcow2Allocation' } } + +## +# @Qcow2RefcountTable: +# +# QCOW2 refcount table information +# +# @location: refcount table offset and size in image +# +# Since: 5.0 +## +{ 'struct': 'Qcow2RefcountTable', + 'data': {'location': 'Qcow2Allocation' } } + +## +# @Qcow2L1Table: +# +# L1 table information +# +# @l2-list: list of L2 table locations +# +# @location: L1 table offset and size in image +# +# @name: entity name the table relates to +# +# Since: 5.0 +## +{ 'struct': 'Qcow2L1Table', + 'data': {'l2-list': ['Qcow2Allocation'], + 'location': 'Qcow2Allocation', + 'name': 'str'} } + +## +# @Qcow2Allocation: +# +# QCOW2 data location in image +# +# @offset: data offset +# +# @size: data size +# +# Since: 5.0 +## +{ 'struct': 'Qcow2Allocation', + 'data': {'offset': 'uint64', 'size': 'uint64' } } + +## +# @Qcow2Bitmaps: +# +# QCOW2 bitmaps information +# +# @nb-bitmaps: the number of bitmaps contained in the image +# +# @bitmap-dir: bitmap directory information +# +# Since: 5.0 +## +{ 'struct': 'Qcow2Bitmaps', + 'data': {'nb-bitmaps': 'int', + 'bitmap-dir': 'Qcow2BitmapDir' } } + +## +# @Qcow2BitmapDir: +# +# QCOW2 bitmap directory information +# +# @dir-entries: list of bitmap directory entries +# +# @location: bitmap directory offset and size in image +# +# Since: 5.0 +## +{ 'struct': 'Qcow2BitmapDir', + 'data': {'dir-entries': ['Qcow2BitmapDirectoryEntry'], + 'location': 'Qcow2Allocation' } } + +## +# @Qcow2BitmapDirectoryEntry: +# +# QCOW2 bitmap directory entry information +# +# @bitmap-table: bitmap table offset and size in image +# +# Since: 5.0 +## +{ 'struct': 'Qcow2BitmapDirectoryEntry', + 'data': {'bitmap-table': 'Qcow2BitmapTbl', + 'bitmap-name': 'str' } } + +## +# @Qcow2BitmapTbl: +# +# QCOW2 bitmap table information +# +# @table-entries: list of bitmap table entries +# +# @location: bitmap table offset and size in image +# +# Since: 5.0 +## +{ 'struct': 'Qcow2BitmapTbl', + 'data': {'table-entries': ['Qcow2BitmapTblEntry'], + 'location': 'Qcow2Allocation' } } + +## +# @Qcow2BitmapTblEntry: +# +# QCOW2 bitmap table entry information +# +# @type: bitmap table entry type +# +# @cluster: bitmap table entry offset and size in image +# +# Since: 5.0 +## +{ 'struct': 'Qcow2BitmapTblEntry', + 'data': {'type': 'Qcow2BitmapTblEntryType', + '*cluster': 'Qcow2Allocation' } } + +## +# @Qcow2BitmapTblEntryType: +# +# An enumeration of cluster types in bitmap table +# +# @all-zeros: cluster should be read as all zeros +# +# @all-ones: cluster should be read as all ones +# +# @serialized: cluster data are written on disk +# +# Since: 5.0 +## +{ 'enum': 'Qcow2BitmapTblEntryType', + 'data': ['all-zeros', 'all-ones', 'serialized'] } + +## +# @Qcow2SnapshotsTable: +# +# Snapshots table location in image file. +# +# @location: offset and size of snapshot table +# +# @l1-list: list of snapshots L1 tables +# +# Since: 5.0 +## +{ 'struct': 'Qcow2SnapshotsTable', + 'data': {'location': 'Qcow2Allocation', + 'l1-list': ['Qcow2L1Table'] } } + ## # @ImageCheck: # @@ -215,6 +418,8 @@ # field is present if the driver for the image format # supports it # +# @viscera: encapsulates QCOW2 tables allocation information +# # Since: 1.4 # ## @@ -223,7 +428,8 @@ '*image-end-offset': 'int', '*corruptions': 'int', '*leaks': 'int', '*corruptions-fixed': 'int', '*leaks-fixed': 'int', '*total-clusters': 'int', '*allocated-clusters': 'int', - '*fragmented-clusters': 'int', '*compressed-clusters': 'int' } } + '*fragmented-clusters': 'int', '*compressed-clusters': 'int', + '*viscera': 'Qcow2Metadata' } } ## # @MapEntry: