From patchwork Fri Feb 5 04:18:01 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Changlong Xie X-Patchwork-Id: 8231181 Return-Path: X-Original-To: patchwork-qemu-devel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id C1B6CBEEE5 for ; Fri, 5 Feb 2016 04:17:31 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 30CC920397 for ; Fri, 5 Feb 2016 04:17:31 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 43BB62027D for ; Fri, 5 Feb 2016 04:17:30 +0000 (UTC) Received: from localhost ([::1]:45828 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aRXpp-0004T2-2S for patchwork-qemu-devel@patchwork.kernel.org; Thu, 04 Feb 2016 23:17:29 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:40641) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aRXpd-0004RK-Qh for qemu-devel@nongnu.org; Thu, 04 Feb 2016 23:17:18 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1aRXpc-0006VR-Sj for qemu-devel@nongnu.org; Thu, 04 Feb 2016 23:17:17 -0500 Received: from [59.151.112.132] (port=36511 helo=heian.cn.fujitsu.com) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aRXpZ-0006TG-UY; Thu, 04 Feb 2016 23:17:14 -0500 X-IronPort-AV: E=Sophos;i="5.20,346,1444665600"; d="scan'208";a="3343051" Received: from unknown (HELO cn.fujitsu.com) ([10.167.33.5]) by heian.cn.fujitsu.com with ESMTP; 05 Feb 2016 12:16:57 +0800 Received: from G08CNEXCHPEKD01.g08.fujitsu.local (unknown [10.167.33.80]) by cn.fujitsu.com (Postfix) with ESMTP id 4CEDD41B7213; Fri, 5 Feb 2016 12:15:55 +0800 (CST) Received: from changlox.g08.fujitsu.local (10.167.225.55) by G08CNEXCHPEKD01.g08.fujitsu.local (10.167.33.89) with Microsoft SMTP Server (TLS) id 14.3.181.6; Fri, 5 Feb 2016 12:16:52 +0800 From: Changlong Xie To: qemu devel , Fam Zheng , Max Reitz , Paolo Bonzini , Kevin Wolf , Stefan Hajnoczi Date: Fri, 5 Feb 2016 12:18:01 +0800 Message-ID: <1454645888-28826-3-git-send-email-xiecl.fnst@cn.fujitsu.com> X-Mailer: git-send-email 1.9.3 In-Reply-To: <1454645888-28826-1-git-send-email-xiecl.fnst@cn.fujitsu.com> References: <1454645888-28826-1-git-send-email-xiecl.fnst@cn.fujitsu.com> MIME-Version: 1.0 X-Originating-IP: [10.167.225.55] X-yoursite-MailScanner-ID: 4CEDD41B7213.A1AE1 X-yoursite-MailScanner: Found to be clean X-yoursite-MailScanner-From: xiecl.fnst@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 v15 2/9] 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+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Wen Congyang We need to access the parent BDS to get the root BDS. Signed-off-by: Wen Congyang Signed-off-by: Changlong Xie --- block.c | 1 + include/block/block_int.h | 1 + 2 files changed, 2 insertions(+) diff --git a/block.c b/block.c index 70ab625..c18b462 100644 --- a/block.c +++ b/block.c @@ -1208,6 +1208,7 @@ 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 89ec138..9204d1e 100644 --- a/include/block/block_int.h +++ b/include/block/block_int.h @@ -363,6 +363,7 @@ extern const BdrvChildRole child_format; struct BdrvChild { BlockDriverState *bs; + BlockDriverState *parent; char *name; const BdrvChildRole *role; QLIST_ENTRY(BdrvChild) next;