From nobody Mon Feb 9 08:11:40 2026 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=1560379079; cv=none; d=zoho.com; s=zohoarc; b=C8ZEbGFXxcpp6yjV80zvQtsE9bD3eKhTzCuUDy9t5PyC5Y0fPeZpl71dF/TgYXgNZqnyqntgmCozT+6LjQw8S8FjIph0ND73yw79oeRWPTLVwC8rCJCLvjQYau0vjzEfcsjF7+HQFKAIVV9CtM/QIBa0XxV28do3yz+eNr/PJC0= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zoho.com; s=zohoarc; t=1560379079; 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=JdeiEocSbSxaXI1Zi1svlWbdQWmNH+lTLxW/rTJ+d4s=; b=lObz5viIxfEBzXMau5HS4kyaGZXVfUEcJuMCEeCJhEpnhZMYWklRXekLP6o21v+cgEZjVZrObahAfnfrtrVhaHR0qHW7VK5itTb0evFd3lrRzCF7pm+QcOQWKMEYQWTdobpezdcXvteI27zcKo+udiY6H1wnVWACIrFTPDWhlqY= 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 1560379079943307.7231020687972; Wed, 12 Jun 2019 15:37:59 -0700 (PDT) Received: from localhost ([::1]:35566 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hbBsU-000603-Qj for importer@patchew.org; Wed, 12 Jun 2019 18:37:58 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:45475) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hbBS4-0007Ss-6i for qemu-devel@nongnu.org; Wed, 12 Jun 2019 18:10:41 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1hbBS3-0007eQ-0b for qemu-devel@nongnu.org; Wed, 12 Jun 2019 18:10:40 -0400 Received: from mx1.redhat.com ([209.132.183.28]:32832) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1hbBS0-0007T7-65; Wed, 12 Jun 2019 18:10:36 -0400 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 156303082126; Wed, 12 Jun 2019 22:10:25 +0000 (UTC) Received: from localhost (unknown [10.40.205.72]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 9937E64036; Wed, 12 Jun 2019 22:10:24 +0000 (UTC) From: Max Reitz To: qemu-block@nongnu.org Date: Thu, 13 Jun 2019 00:09:29 +0200 Message-Id: <20190612221004.2317-8-mreitz@redhat.com> In-Reply-To: <20190612221004.2317-1-mreitz@redhat.com> References: <20190612221004.2317-1-mreitz@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.42]); Wed, 12 Jun 2019 22:10:25 +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 v5 07/42] block: *filtered_cow_child() for *has_zero_init() 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-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" bdrv_has_zero_init() and the related bdrv_unallocated_blocks_are_zero() should use bdrv_filtered_cow_child() if they want to check whether the given BDS has a COW backing file. Signed-off-by: Max Reitz Reviewed-by: Vladimir Sementsov-Ogievskiy --- block.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/block.c b/block.c index be18130944..64d6190984 100644 --- a/block.c +++ b/block.c @@ -4933,7 +4933,7 @@ int bdrv_has_zero_init(BlockDriverState *bs) =20 /* If BS is a copy on write image, it is initialized to the contents of the base image, which may not be zeroes. */ - if (bs->backing) { + if (bdrv_filtered_cow_child(bs)) { return 0; } if (bs->drv->bdrv_has_zero_init) { @@ -4951,7 +4951,7 @@ bool bdrv_unallocated_blocks_are_zero(BlockDriverStat= e *bs) { BlockDriverInfo bdi; =20 - if (bs->backing) { + if (bdrv_filtered_cow_child(bs)) { return false; } =20 --=20 2.21.0