Function crypto_unregister_all

freebsd/opencrypto/crypto.c:1159–1184

* Unregister all algorithms associated with a crypto driver. * If there are pending sessions using it, leave enough information * around so that subsequent calls using those sessions will * correctly detect the driver has been unregistered and reroute * requests. */

 * requests.
 */
int
crypto_unregister_all(uint32_t driverid)
{
	struct cryptocap *cap;

	CRYPTO_DRIVER_LOCK();
	cap = crypto_checkdriver(driverid);
	if (cap == NULL) {
		CRYPTO_DRIVER_UNLOCK();
		return (EINVAL);
	}

	cap->cc_flags |= CRYPTOCAP_F_CLEANUP;
	crypto_drivers[driverid] = NULL;

	/*
	 * XXX: This doesn't do anything to kick sessions that
	 * have no pending operations.
	 */
	while (cap->cc_sessions != 0 || cap->cc_koperations != 0)
		mtx_sleep(cap, &crypto_drivers_mtx, 0, "cryunreg", 0);
	CRYPTO_DRIVER_UNLOCK();
	cap_rele(cap);

	return (0);
}

/*
 * Clear blockage on a driver.  The what parameter indicates whether