NBD_RT_DISCONNECT_REQUESTED
set_bit(NBD_RT_DISCONNECT_REQUESTED, &config->runtime_flags);
if (test_bit(NBD_RT_DISCONNECT_REQUESTED, &config->runtime_flags))
test_bit(NBD_RT_DISCONNECT_REQUESTED, &config->runtime_flags);
if (test_and_clear_bit(NBD_RT_DISCONNECT_REQUESTED,