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-rw-r--r--block/block-backend.c11
-rw-r--r--include/sysemu/block-backend.h1
2 files changed, 12 insertions, 0 deletions
diff --git a/block/block-backend.c b/block/block-backend.c
index a5c58c5fd8..19fdaaec1a 100644
--- a/block/block-backend.c
+++ b/block/block-backend.c
@@ -334,6 +334,17 @@ void blk_hide_on_behalf_of_hmp_drive_del(BlockBackend *blk)
}
/*
+ * Associates a new BlockDriverState with @blk.
+ */
+void blk_insert_bs(BlockBackend *blk, BlockDriverState *bs)
+{
+ assert(!blk->bs && !bs->blk);
+ bdrv_ref(bs);
+ blk->bs = bs;
+ bs->blk = blk;
+}
+
+/*
* Attach device model @dev to @blk.
* Return 0 on success, -EBUSY when a device model is attached already.
*/
diff --git a/include/sysemu/block-backend.h b/include/sysemu/block-backend.h
index 52e35a1491..9306a527bb 100644
--- a/include/sysemu/block-backend.h
+++ b/include/sysemu/block-backend.h
@@ -72,6 +72,7 @@ BlockBackend *blk_by_name(const char *name);
BlockBackend *blk_next(BlockBackend *blk);
BlockDriverState *blk_bs(BlockBackend *blk);
+void blk_insert_bs(BlockBackend *blk, BlockDriverState *bs);
void blk_hide_on_behalf_of_hmp_drive_del(BlockBackend *blk);