[Qemu-block] [PATCH 12/16] skip nbd_target when starting block replication

[Wen Congyang]

Signed-off-by: Wen Congyang <address@hidden>
Signed-off-by: zhanghailiang <address@hidden>
Signed-off-by: Gonglei <address@hidden>
---
 block.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/block.c b/block.c
index c7670d2..50f3532 100644
--- a/block.c
+++ b/block.c
@@ -4396,6 +4396,10 @@ 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) {
@@ -4410,6 +4414,10 @@ 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) {
@@ -4424,6 +4432,10 @@ void bdrv_stop_replication(BlockDriverState *bs, bool 
failover, 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, failover, errp);
     } else if (bs->file) {
-- 
2.4.3