From mboxrd@z Thu Jan  1 00:00:00 1970
Received: from eggs.gnu.org ([2001:4830:134:3::10]:36271)
	by lists.gnu.org with esmtp (Exim 4.71)
	(envelope-from <wency@cn.fujitsu.com>) id 1YdyN9-0005gt-Th
	for qemu-devel@nongnu.org; Fri, 03 Apr 2015 05:58:48 -0400
Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)
	(envelope-from <wency@cn.fujitsu.com>) id 1YdyN6-0003dP-8M
	for qemu-devel@nongnu.org; Fri, 03 Apr 2015 05:58:43 -0400
From: Wen Congyang <wency@cn.fujitsu.com>
Date: Fri, 3 Apr 2015 18:01:19 +0800
Message-ID: <1428055280-12015-14-git-send-email-wency@cn.fujitsu.com>
In-Reply-To: <1428055280-12015-1-git-send-email-wency@cn.fujitsu.com>
References: <1428055280-12015-1-git-send-email-wency@cn.fujitsu.com>
MIME-Version: 1.0
Content-Type: text/plain
Subject: [Qemu-devel] [PATCH COLO v3 13/14] skip nbd_target when starting
	block replication
List-Id: <qemu-devel.nongnu.org>
List-Unsubscribe: <https://lists.nongnu.org/mailman/options/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>
List-Archive: <http://lists.nongnu.org/archive/html/qemu-devel>
List-Post: <mailto:qemu-devel@nongnu.org>
List-Help: <mailto:qemu-devel-request@nongnu.org?subject=help>
List-Subscribe: <https://lists.nongnu.org/mailman/listinfo/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=subscribe>
To: qemu devel <qemu-devel@nongnu.org>, Fam Zheng <famz@redhat.com>, Max Reitz <mreitz@redhat.com>, Paolo Bonzini <pbonzini@redhat.com>
Cc: Kevin Wolf <kwolf@redhat.com>, qemu block <qemu-block@nongnu.org>, Lai Jiangshan <laijs@cn.fujitsu.com>, Jiang Yunhong <yunhong.jiang@intel.com>, Dong Eddie <eddie.dong@intel.com>, "Dr. David Alan Gilbert" <dgilbert@redhat.com>, Gonglei <arei.gonglei@huawei.com>, Stefan Hajnoczi <stefanha@redhat.com>, Yang Hongyang <yanghy@cn.fujitsu.com>, zhanghailiang <zhang.zhanghailiang@huawei.com>

Signed-off-by: Wen Congyang <wency@cn.fujitsu.com>
Signed-off-by: zhanghailiang <zhang.zhanghailiang@huawei.com>
Signed-off-by: Gonglei <arei.gonglei@huawei.com>
---
 block.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/block.c b/block.c
index 2df950b..0bf097d 100644
--- a/block.c
+++ b/block.c
@@ -6412,6 +6412,10 @@ void bdrv_start_replication(BlockDriverState *bs, ReplicationMode mode,
 {
     BlockDriver *drv = bs->drv;
 
+    if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_BACKING_REFERENCE, NULL)) {
+        return;
+    }
+
     if (drv && drv->bdrv_start_replication) {
         drv->bdrv_start_replication(bs, mode, errp);
     } else if (bs->file) {
@@ -6425,6 +6429,10 @@ void bdrv_do_checkpoint(BlockDriverState *bs, Error **errp)
 {
     BlockDriver *drv = bs->drv;
 
+    if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_BACKING_REFERENCE, NULL)) {
+        return;
+    }
+
     if (drv && drv->bdrv_do_checkpoint) {
         drv->bdrv_do_checkpoint(bs, errp);
     } else if (bs->file) {
@@ -6438,6 +6446,10 @@ void bdrv_stop_replication(BlockDriverState *bs, Error **errp)
 {
     BlockDriver *drv = bs->drv;
 
+    if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_BACKING_REFERENCE, NULL)) {
+        return;
+    }
+
     if (drv && drv->bdrv_stop_replication) {
         drv->bdrv_stop_replication(bs, errp);
     } else if (bs->file) {
-- 
2.1.0