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-rw-r--r--block.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/block.c b/block.c
index a99e6d8509..34935015dd 100644
--- a/block.c
+++ b/block.c
@@ -1393,6 +1393,7 @@ static int bdrv_open_inherit(BlockDriverState **pbs, const char *filename,
BlockDriverState *bs;
BlockDriver *drv = NULL;
const char *drvname;
+ const char *backing;
Error *local_err = NULL;
int snapshot_flags = 0;
@@ -1460,6 +1461,12 @@ static int bdrv_open_inherit(BlockDriverState **pbs, const char *filename,
assert(drvname || !(flags & BDRV_O_PROTOCOL));
+ backing = qdict_get_try_str(options, "backing");
+ if (backing && *backing == '\0') {
+ flags |= BDRV_O_NO_BACKING;
+ qdict_del(options, "backing");
+ }
+
bs->open_flags = flags;
bs->options = options;
options = qdict_clone_shallow(options);