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-rw-r--r--include/block/block_int-common.h4
1 files changed, 3 insertions, 1 deletions
diff --git a/include/block/block_int-common.h b/include/block/block_int-common.h
index 151279d481..761276127e 100644
--- a/include/block/block_int-common.h
+++ b/include/block/block_int-common.h
@@ -985,7 +985,9 @@ struct BdrvChildClass {
* can update its reference.
*/
int (*update_filename)(BdrvChild *child, BlockDriverState *new_base,
- const char *filename, Error **errp);
+ const char *filename,
+ bool backing_mask_protocol,
+ Error **errp);
bool (*change_aio_ctx)(BdrvChild *child, AioContext *ctx,
GHashTable *visited, Transaction *tran,