block: Mark bdrv_co_ioctl() and callers GRAPH_RDLOCK

This adds GRAPH_RDLOCK annotations to declare that callers of
bdrv_co_ioctl() need to hold a reader lock for the graph.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20230203152202.49054-6-kwolf@redhat.com>
Reviewed-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/block/io.c b/block/io.c
index a0f8efc..c03233a 100644
--- a/block/io.c
+++ b/block/io.c
@@ -3083,6 +3083,7 @@ int coroutine_fn bdrv_co_ioctl(BlockDriverState *bs, int req, void *buf)
     };
     BlockAIOCB *acb;
     IO_CODE();
+    assert_bdrv_graph_readable();
 
     bdrv_inc_in_flight(bs);
     if (!drv || (!drv->bdrv_aio_ioctl && !drv->bdrv_co_ioctl)) {