From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:37334) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZtZK9-0004NQ-H2 for qemu-devel@nongnu.org; Tue, 03 Nov 2015 06:00:22 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ZtZK5-0002i1-M2 for qemu-devel@nongnu.org; Tue, 03 Nov 2015 06:00:21 -0500 From: Wen Congyang Date: Tue, 3 Nov 2015 18:58:39 +0800 Message-ID: <1446548329-17475-3-git-send-email-wency@cn.fujitsu.com> In-Reply-To: <1446548329-17475-1-git-send-email-wency@cn.fujitsu.com> References: <1446548329-17475-1-git-send-email-wency@cn.fujitsu.com> MIME-Version: 1.0 Content-Type: text/plain Subject: [Qemu-devel] [PATCH v11 02/12] Store parent BDS in BdrvChild List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu devel , Fam Zheng , Max Reitz , Paolo Bonzini , Stefan Hajnoczi Cc: Kevin Wolf , qemu block , Jiang Yunhong , Dong Eddie , "Dr. David Alan Gilbert" , "Michael R. Hines" We need to access the parent BDS to get the root BDS. Signed-off-by: Wen Congyang --- block.c | 1 + include/block/block_int.h | 1 + 2 files changed, 2 insertions(+) diff --git a/block.c b/block.c index 1d6c115..52a91ad 100644 --- a/block.c +++ b/block.c @@ -1092,6 +1092,7 @@ BdrvChild *bdrv_attach_child(BlockDriverState *parent_bs, BdrvChild *child = g_new(BdrvChild, 1); *child = (BdrvChild) { .bs = child_bs, + .parent = parent_bs, .role = child_role, }; diff --git a/include/block/block_int.h b/include/block/block_int.h index 87af5ae..3285739 100644 --- a/include/block/block_int.h +++ b/include/block/block_int.h @@ -342,6 +342,7 @@ extern const BdrvChildRole child_format; struct BdrvChild { BlockDriverState *bs; + BlockDriverState *parent; const BdrvChildRole *role; QLIST_ENTRY(BdrvChild) next; QLIST_ENTRY(BdrvChild) next_parent; -- 2.4.3