iscsiplugin:volume_size_info

return nothing for now, as we can't get volume used inside the volume, stats are empty.

Signed-off-by: Alexandre Derumier <aderumier@odiso.com>

PVE/Storage/ISCSIPlugin.pm

@@ -378,4 +378,10 @@ sub check_connection {
     return iscsi_test_portal($portal);
 }
 
+sub volume_size_info {
+    my ($class, $scfg, $storeid, $volname, $timeout) = @_;
+
+    return undef;
+}
+
 1;