From nobody Mon Feb 9 19:06:10 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zohomail.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; dkim=fail; spf=pass (zohomail.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 Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1580836361596915.4909669437031; Tue, 4 Feb 2020 09:12:41 -0800 (PST) Received: from localhost ([::1]:34720 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iz1ke-0008Ag-Iz for importer@patchew.org; Tue, 04 Feb 2020 12:12:40 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:52837) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iz1hC-0002cO-CW for qemu-devel@nongnu.org; Tue, 04 Feb 2020 12:09:07 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iz1hB-0001nR-Fm for qemu-devel@nongnu.org; Tue, 04 Feb 2020 12:09:06 -0500 Received: from us-smtp-2.mimecast.com ([207.211.31.81]:56037 helo=us-smtp-delivery-1.mimecast.com) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1iz1hB-0001md-Cg for qemu-devel@nongnu.org; Tue, 04 Feb 2020 12:09:05 -0500 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-377-flwW7yBbNP-7xUXXlMn4Lw-1; Tue, 04 Feb 2020 12:09:01 -0500 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 mimecast-mx01.redhat.com (Postfix) with ESMTPS id 5419E1882CCC; Tue, 4 Feb 2020 17:09:00 +0000 (UTC) Received: from localhost (ovpn-117-98.ams2.redhat.com [10.36.117.98]) by smtp.corp.redhat.com (Postfix) with ESMTPS id DE80787B12; Tue, 4 Feb 2020 17:08:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1580836145; 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=wqIQyGKK1jBaGsPdtuKlUu2WkAmKUzmE4Za7JI6HE3k=; b=gNbYwqWaFf4Nd9PrcQT1bAltlXo+R7u6oJTCoBLEDCHpWxxFJuFmHP9wdPoPPeEO3yfY1N VfuMw4Rju/JuEkYD+EhC8bxuhpVDJjllwMsxaEikekE05PPG9hO+vhio4Lj6NBi/CVGKk9 Z3al38TzaegLN3vEZz/VVuqfjryghvs= From: Max Reitz To: qemu-block@nongnu.org Subject: [PATCH v2 03/33] block: Add BdrvChildRole Date: Tue, 4 Feb 2020 18:08:18 +0100 Message-Id: <20200204170848.614480-4-mreitz@redhat.com> In-Reply-To: <20200204170848.614480-1-mreitz@redhat.com> References: <20200204170848.614480-1-mreitz@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 X-MC-Unique: flwW7yBbNP-7xUXXlMn4Lw-1 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 207.211.31.81 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" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Type: text/plain; charset="utf-8" This enum will supplement BdrvChildClass when it comes to what role (or combination of roles) a child takes for its parent. Because empty enums are not allowed, let us just start with it filled. Signed-off-by: Max Reitz Reviewed-by: Eric Blake --- include/block/block.h | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) diff --git a/include/block/block.h b/include/block/block.h index 38963ef203..0f7e8caa5b 100644 --- a/include/block/block.h +++ b/include/block/block.h @@ -279,6 +279,33 @@ enum { DEFAULT_PERM_UNCHANGED =3D BLK_PERM_ALL & ~DEFAULT_PERM_PASSTHROU= GH, }; =20 +typedef enum BdrvChildRole { + /* Child stores data */ + BDRV_CHILD_DATA =3D (1 << 0), + + /* Child stores metadata */ + BDRV_CHILD_METADATA =3D (1 << 1), + + /* Filtered child */ + BDRV_CHILD_FILTERED =3D (1 << 2), + + /* Child to COW from (backing child) */ + BDRV_CHILD_COW =3D (1 << 3), + + /* + * The primary child. For most drivers, this is the child whose + * filename applies best to the parent node. + * Each parent must give this flag to no more than one child at a + * time. + */ + BDRV_CHILD_PRIMARY =3D (1 << 4), + + /* Useful combination of flags */ + BDRV_CHILD_IMAGE =3D BDRV_CHILD_DATA + | BDRV_CHILD_METADATA + | BDRV_CHILD_PRIMARY, +} BdrvChildRole; + char *bdrv_perm_names(uint64_t perm); uint64_t bdrv_qapi_perm_to_blk_perm(BlockPermission qapi_perm); =20 --=20 2.24.1