From nobody Tue Nov 11 20:52:16 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=1565367523; cv=none; d=zoho.com; s=zohoarc; b=Xevsym0GoHFuG4ugDea91hA+DVwTl81wG0saCCgDOIe7q2IKJYKL2akD0JYV2XXbds6PK5MfjipkqV97Z4hTQxLPbGmtRGBi6+p8q8bB4AnAzHrYkWQs4s2D6x/SCHaUkvjmxt7MnkVAVNhiwpiNwuF/MSDrgvEiY9cGiFFnP7Q= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zoho.com; s=zohoarc; t=1565367523; 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=2PbbLtR2ytbi97U3yOvlr2Hpk8BxN7qMwVSCb+CBeCg=; b=NvQCgijd5rcBttNv3BzjXb6Y8pwZr+OoSx83kIfRiv9tqJf+M3Zs+TPNBLAkpasWm/zVP/u8NJIvTZmWJ1yitExd6QWo/HxWyTDbTPqMR4TA1UBMlSE5j8CGwpWMbPaUtO/uLarJtUOE1B0C+3jBlJpIPJbbebKYUA9yNKAwHAM= 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 (209.51.188.17 [209.51.188.17]) by mx.zohomail.com with SMTPS id 1565367523784365.41745623140025; Fri, 9 Aug 2019 09:18:43 -0700 (PDT) Received: from localhost ([::1]:60862 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hw7bB-0001vt-NC for importer@patchew.org; Fri, 09 Aug 2019 12:18:37 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:56819) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hw7XB-0000e9-D3 for qemu-devel@nongnu.org; Fri, 09 Aug 2019 12:14:31 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1hw7XA-0003zR-CS for qemu-devel@nongnu.org; Fri, 09 Aug 2019 12:14:29 -0400 Received: from mx1.redhat.com ([209.132.183.28]:53644) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1hw7X8-0003xz-7o; Fri, 09 Aug 2019 12:14:26 -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 87E2C30FB8F1; Fri, 9 Aug 2019 16:14:25 +0000 (UTC) Received: from localhost (unknown [10.40.205.179]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 2563A10013A1; Fri, 9 Aug 2019 16:14:24 +0000 (UTC) From: Max Reitz To: qemu-block@nongnu.org Date: Fri, 9 Aug 2019 18:13:32 +0200 Message-Id: <20190809161407.11920-8-mreitz@redhat.com> In-Reply-To: <20190809161407.11920-1-mreitz@redhat.com> References: <20190809161407.11920-1-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-4.5.16 (mx1.redhat.com [10.5.110.47]); Fri, 09 Aug 2019 16:14:25 +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 v6 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 bfa5e27850..486c75d847 100644 --- a/block.c +++ b/block.c @@ -5063,7 +5063,7 @@ 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) { @@ -5081,7 +5081,7 @@ 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