From nobody Tue Nov 11 22:48:08 2025 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.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; Authentication-Results: mx.zohomail.com; spf=pass (zoho.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=redhat.com ARC-Seal: i=1; a=rsa-sha256; t=1566241119; cv=none; d=zoho.com; s=zohoarc; b=c2fThs6nPjpIFTDObNf01LaHzBN4+5NQ0e7l5oVmRsNe+VwuL7HMebSeNJt3SDWxE2tYV5Y8NfD8OiLLFe0ViBiBj4EhiC2otdFrstHyL7jFRKo+YukFdAHkHCxRYVvvoya/26RkBUwZV5tGYo30/QVrHk29/xNIJAvDCc0NgVo= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zoho.com; s=zohoarc; t=1566241119; h=Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To:ARC-Authentication-Results; bh=Y9bSz70fUbOalXytX4NvXY1LI/itEzH7Q0yAbC9uiaE=; b=jgkBLREqxxWmp14w3bIMuA8/GjzRnvfKOpbcG7xNVrGPullQagIwS7pMME47pO4NlBcgPh6TGpw9xX+jdnkNhMTQew5B4a5mKphoNBemWyrLOE5/yyJO5cPIWlKIX1WYd1zcszwiaUU0Et2iu8o4EptWVgYijS6oxrRUt0kZW4c= ARC-Authentication-Results: i=1; mx.zoho.com; spf=pass (zoho.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 1566241119651516.3973208500581; Mon, 19 Aug 2019 11:58:39 -0700 (PDT) Received: from localhost ([::1]:56582 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1hzmrV-0004DI-Bj for importer@patchew.org; Mon, 19 Aug 2019 14:58:37 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:60893) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1hzmpN-0001qq-NT for qemu-devel@nongnu.org; Mon, 19 Aug 2019 14:56:26 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1hzmpM-00021F-9X for qemu-devel@nongnu.org; Mon, 19 Aug 2019 14:56:25 -0400 Received: from mx1.redhat.com ([209.132.183.28]:58424) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1hzmpJ-0001yv-KB; Mon, 19 Aug 2019 14:56:21 -0400 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id E9318106E96B; Mon, 19 Aug 2019 18:56:20 +0000 (UTC) Received: from localhost (ovpn-204-64.brq.redhat.com [10.40.204.64]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 8006110013A1; Mon, 19 Aug 2019 18:56:20 +0000 (UTC) From: Max Reitz To: qemu-block@nongnu.org Date: Mon, 19 Aug 2019 20:55:52 +0200 Message-Id: <20190819185602.4267-7-mreitz@redhat.com> In-Reply-To: <20190819185602.4267-1-mreitz@redhat.com> References: <20190819185602.4267-1-mreitz@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.6.2 (mx1.redhat.com [10.5.110.66]); Mon, 19 Aug 2019 18:56:20 +0000 (UTC) Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH v2 06/16] qcow2: Put qcow2_upgrade() into its own function 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 , qemu-devel@nongnu.org, Max Reitz Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Type: text/plain; charset="utf-8" This does not make sense right now, but it will make sense once we need to do more than to just update s->qcow_version. Signed-off-by: Max Reitz Reviewed-by: Eric Blake --- block/qcow2.c | 43 ++++++++++++++++++++++++++++++++++++++----- 1 file changed, 38 insertions(+), 5 deletions(-) diff --git a/block/qcow2.c b/block/qcow2.c index dbb50bc2f8..190a3874c1 100644 --- a/block/qcow2.c +++ b/block/qcow2.c @@ -4749,12 +4749,46 @@ static int qcow2_downgrade(BlockDriverState *bs, in= t target_version, return 0; } =20 +/* + * Upgrades an image's version. While newer versions encompass all + * features of older versions, some things may have to be presented + * differently. + */ +static int qcow2_upgrade(BlockDriverState *bs, int target_version, + BlockDriverAmendStatusCB *status_cb, void *cb_opa= que, + Error **errp) +{ + BDRVQcow2State *s =3D bs->opaque; + int current_version =3D s->qcow_version; + int ret; + + /* This is qcow2_upgrade(), not qcow2_downgrade() */ + assert(target_version > current_version); + + /* There are no other versions (yet) that you can upgrade to */ + assert(target_version =3D=3D 3); + + status_cb(bs, 0, 1, cb_opaque); + + s->qcow_version =3D target_version; + ret =3D qcow2_update_header(bs); + if (ret < 0) { + s->qcow_version =3D current_version; + error_setg_errno(errp, -ret, "Failed to update the image header"); + return ret; + } + status_cb(bs, 1, 1, cb_opaque); + + return 0; +} + typedef enum Qcow2AmendOperation { /* This is the value Qcow2AmendHelperCBInfo::last_operation will be * statically initialized to so that the helper CB can discern the fir= st * invocation from an operation change */ QCOW2_NO_OPERATION =3D 0, =20 + QCOW2_UPGRADING, QCOW2_CHANGING_REFCOUNT_ORDER, QCOW2_DOWNGRADING, } Qcow2AmendOperation; @@ -4937,17 +4971,16 @@ static int qcow2_amend_options(BlockDriverState *bs= , QemuOpts *opts, helper_cb_info =3D (Qcow2AmendHelperCBInfo){ .original_status_cb =3D status_cb, .original_cb_opaque =3D cb_opaque, - .total_operations =3D (new_version < old_version) + .total_operations =3D (new_version !=3D old_version) + (s->refcount_bits !=3D refcount_bits) }; =20 /* Upgrade first (some features may require compat=3D1.1) */ if (new_version > old_version) { - s->qcow_version =3D new_version; - ret =3D qcow2_update_header(bs); + helper_cb_info.current_operation =3D QCOW2_UPGRADING; + ret =3D qcow2_upgrade(bs, new_version, &qcow2_amend_helper_cb, + &helper_cb_info, errp); if (ret < 0) { - s->qcow_version =3D old_version; - error_setg_errno(errp, -ret, "Failed to update the image heade= r"); return ret; } } --=20 2.21.0