From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.0 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 53334C28CBC for ; Wed, 6 May 2020 18:13:12 +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 1D62D20735 for ; Wed, 6 May 2020 18:13:11 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="M16bWsto" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1D62D20735 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:60010 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jWOXf-0004Wn-5M for qemu-devel@archiver.kernel.org; Wed, 06 May 2020 14:13:11 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:56298) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jWOWO-00040v-OH for qemu-devel@nongnu.org; Wed, 06 May 2020 14:11:52 -0400 Received: from us-smtp-1.mimecast.com ([205.139.110.61]:52545 helo=us-smtp-delivery-1.mimecast.com) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1jWOWO-0000A0-34 for qemu-devel@nongnu.org; Wed, 06 May 2020 14:11:52 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1588788711; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=1GItoqWGMgAlUvSgr9EIgF/U2dcag+tFnpsip8SswFc=; b=M16bWstoRCBlVWOB1yqyBMpOo+R9eHNeup0Clzxmf6efGqGPyf+rTsbwUqTNjCnH8Va1Iz XPo2C4V1BwpwBVNxEjfhazwDLQkqyDfQfqys9EkfFblKISiVm8OCyriHOAU8W2LgzddPGr 2ydSD5G7fX68DWh8o05yzWobC0T72bI= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-470-I4H5QNbhMuaUO40NNh2nag-1; Wed, 06 May 2020 14:11:47 -0400 X-MC-Unique: I4H5QNbhMuaUO40NNh2nag-1 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 9D9FA1005510; Wed, 6 May 2020 18:11:45 +0000 (UTC) Received: from [10.3.114.73] (ovpn-114-73.phx2.redhat.com [10.3.114.73]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 1425962952; Wed, 6 May 2020 18:11:44 +0000 (UTC) Subject: Re: [PATCH v5 29/31] qcow2: Assert that expand_zero_clusters_in_l1() does not support subclusters To: Alberto Garcia , qemu-devel@nongnu.org References: <7254228f69935c1802b2a16b2e77121fa6a46d5a.1588699789.git.berto@igalia.com> From: Eric Blake Organization: Red Hat, Inc. Message-ID: <69094e7a-0f9b-940a-a818-8deae2d3c596@redhat.com> Date: Wed, 6 May 2020 13:11:44 -0500 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.7.0 MIME-Version: 1.0 In-Reply-To: <7254228f69935c1802b2a16b2e77121fa6a46d5a.1588699789.git.berto@igalia.com> Content-Language: en-US X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Received-SPF: pass client-ip=205.139.110.61; envelope-from=eblake@redhat.com; helo=us-smtp-delivery-1.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/05/06 05:50:09 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001 autolearn=_AUTOLEARN 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: Kevin Wolf , Vladimir Sementsov-Ogievskiy , qemu-block@nongnu.org, Max Reitz Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On 5/5/20 12:38 PM, Alberto Garcia wrote: > This function is only used by qcow2_expand_zero_clusters() to > downgrade a qcow2 image to a previous version. It is however not > possible to downgrade an image with extended L2 entries because older > versions of qcow2 do not have this feature. > > Signed-off-by: Alberto Garcia > --- > block/qcow2-cluster.c | 8 +++++++- > tests/qemu-iotests/061 | 6 ++++++ > tests/qemu-iotests/061.out | 5 +++++ > 3 files changed, 18 insertions(+), 1 deletion(-) Reviewed-by: Eric Blake -- Eric Blake, Principal Software Engineer Red Hat, Inc. +1-919-301-3226 Virtualization: qemu.org | libvirt.org