We share the same set of QAPI options with file-posix, but locking is
not supported here. So error out if it is specified as 'on' for now.

Signed-off-by: Fam Zheng <famz@redhat.com>
---
 block/file-win32.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/block/file-win32.c b/block/file-win32.c
index 7872e00..534021b 100644
--- a/block/file-win32.c
+++ b/block/file-win32.c
@@ -344,6 +344,11 @@ static int raw_open(BlockDriverState *bs, QDict *options, int flags,
         goto fail;
     }
 
+    if (qdict_get_try_bool(options, "locking", false)) {
+        error_setg(errp, "locking=on is not supported on Windows");
+        goto fail;
+    }
+
     filename = qemu_opt_get(opts, "filename");
 
     use_aio = get_aio_option(opts, flags, &local_err);
-- 
2.9.3