[Qemu-block] [PATCH v3 3/5] block: Add check on mirror target

[Fam Zheng]

Signed-off-by: Fam Zheng <address@hidden>
Reviewed-by: Max Reitz <address@hidden>
---
 blockdev.c            | 3 +++
 include/block/block.h | 1 +
 2 files changed, 4 insertions(+)

diff --git a/blockdev.c b/blockdev.c
index 22e06ba..f42e171 100644
--- a/blockdev.c
+++ b/blockdev.c
@@ -3342,6 +3342,9 @@ static void blockdev_mirror_common(BlockDriverState *bs,
     if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_MIRROR_SOURCE, errp)) {
         return;
     }
+    if (bdrv_op_is_blocked(target, BLOCK_OP_TYPE_MIRROR_TARGET, errp)) {
+        return;
+    }
 
     if (!bs->backing && sync == MIRROR_SYNC_MODE_TOP) {
         sync = MIRROR_SYNC_MODE_FULL;
diff --git a/include/block/block.h b/include/block/block.h
index 8ea12fa..c96923d 100644
--- a/include/block/block.h
+++ b/include/block/block.h
@@ -170,6 +170,7 @@ typedef enum BlockOpType {
     BLOCK_OP_TYPE_INTERNAL_SNAPSHOT,
     BLOCK_OP_TYPE_INTERNAL_SNAPSHOT_DELETE,
     BLOCK_OP_TYPE_MIRROR_SOURCE,
+    BLOCK_OP_TYPE_MIRROR_TARGET,
     BLOCK_OP_TYPE_RESIZE,
     BLOCK_OP_TYPE_STREAM,
     BLOCK_OP_TYPE_REPLACE,
-- 
2.4.3