drbd_change_state
rv2 = drbd_change_state(device, CS_VERBOSE, NS(role, R_SECONDARY));
rv2 = drbd_change_state(device, CS_VERBOSE, NS(role, R_SECONDARY));
rv = drbd_change_state(device, CS_VERBOSE, mask, val);
drbd_change_state(device, CS_HARD, mask, val);
extern enum drbd_state_rv drbd_change_state(struct drbd_device *device,