block: Mark bdrv_get_cumulative_perm() and callers GRAPH_RDLOCK
The function reads the parents list, so it needs to hold the graph lock. This happens to result in BlockDriver.bdrv_set_perm() to be called with the graph lock held. For consistency, make it the same for all of the BlockDriver callbacks for updating permissions and annotate the function pointers with GRAPH_RDLOCK_PTR. Signed-off-by:Kevin Wolf <kwolf@redhat.com> Reviewed-by:
Emanuele Giuseppe Esposito <eesposit@redhat.com> Reviewed-by:
Stefan Hajnoczi <stefanha@redhat.com> Message-ID: <20230911094620.45040-15-kwolf@redhat.com> Signed-off-by:
Kevin Wolf <kwolf@redhat.com>
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