From patchwork Wed Dec 2 05:31:43 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wen Congyang X-Patchwork-Id: 551174 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 6190514029E for ; Wed, 2 Dec 2015 16:34:41 +1100 (AEDT) Received: from localhost ([::1]:56295 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1a403r-0003Hy-9J for incoming@patchwork.ozlabs.org; Wed, 02 Dec 2015 00:34:39 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:56969) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1a402G-0000Bk-96 for qemu-devel@nongnu.org; Wed, 02 Dec 2015 00:33:01 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1a402F-0002S1-Aw for qemu-devel@nongnu.org; Wed, 02 Dec 2015 00:33:00 -0500 Received: from [59.151.112.132] (port=56165 helo=heian.cn.fujitsu.com) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1a402D-0002Oi-Ag; Wed, 02 Dec 2015 00:32:57 -0500 X-IronPort-AV: E=Sophos;i="5.20,346,1444665600"; d="scan'208";a="1071942" Received: from unknown (HELO cn.fujitsu.com) ([10.167.33.5]) by heian.cn.fujitsu.com with ESMTP; 02 Dec 2015 13:32:37 +0800 Received: from G08CNEXCHPEKD01.g08.fujitsu.local (unknown [10.167.33.80]) by cn.fujitsu.com (Postfix) with ESMTP id 6CE0E41890E1; Wed, 2 Dec 2015 13:32:39 +0800 (CST) Received: from G08FNSTD140052.g08.fujitsu.local (10.167.226.52) by G08CNEXCHPEKD01.g08.fujitsu.local (10.167.33.89) with Microsoft SMTP Server (TLS) id 14.3.181.6; Wed, 2 Dec 2015 13:32:38 +0800 From: Wen Congyang To: qemu devel , Fam Zheng , Max Reitz , Paolo Bonzini , Kevin Wolf , Stefan Hajnoczi Date: Wed, 2 Dec 2015 13:31:43 +0800 Message-ID: <1449034311-4094-3-git-send-email-wency@cn.fujitsu.com> X-Mailer: git-send-email 2.5.0 In-Reply-To: <1449034311-4094-1-git-send-email-wency@cn.fujitsu.com> References: <1449034311-4094-1-git-send-email-wency@cn.fujitsu.com> MIME-Version: 1.0 X-Originating-IP: [10.167.226.52] X-yoursite-MailScanner-Information: Please contact the ISP for more information X-yoursite-MailScanner-ID: 6CE0E41890E1.A9130 X-yoursite-MailScanner: Found to be clean X-yoursite-MailScanner-From: wency@cn.fujitsu.com X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 59.151.112.132 Cc: qemu block , Jiang Yunhong , Dong Eddie , "Dr. David Alan Gilbert" , "Michael R. Hines" , Gonglei , zhanghailiang Subject: [Qemu-devel] [Patch v12 resend 02/10] Store parent BDS in BdrvChild X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org We need to access the parent BDS to get the root BDS. Signed-off-by: Wen Congyang Signed-off-by: zhanghailiang Signed-off-by: Gonglei --- block.c | 1 + include/block/block_int.h | 1 + 2 files changed, 2 insertions(+) diff --git a/block.c b/block.c index eaf479a..0a0468f 100644 --- a/block.c +++ b/block.c @@ -1204,6 +1204,7 @@ BdrvChild *bdrv_attach_child(BlockDriverState *parent_bs, BdrvChild *child = g_new(BdrvChild, 1); *child = (BdrvChild) { .bs = child_bs, + .parent = parent_bs, .name = g_strdup(child_name), .role = child_role, }; diff --git a/include/block/block_int.h b/include/block/block_int.h index ea20d12..1f56046 100644 --- a/include/block/block_int.h +++ b/include/block/block_int.h @@ -357,6 +357,7 @@ extern const BdrvChildRole child_format; struct BdrvChild { BlockDriverState *bs; + BlockDriverState *parent; char *name; const BdrvChildRole *role; QLIST_ENTRY(BdrvChild) next;