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/*
 * api-ni.c will be modified to handle adding a UDSP 
 * All UDSP operations are done under mutex and exclusive spin
 * lock to avoid constructs changing during application of the
 * policies.
 */
int
LNetCtl(unsigned int cmd, void *arg)
{
...
	case IOC_LIBCFS_ADD_UDSP: {
		struct lnet_ioctl_config_udsp *config_udsp = arg;
		mutex_lock(&the_lnet.ln_api_mutex);
		/*
		 * add and do initial flattening of the UDSP into
		 * internal structures.
		 */
		rc = lnet_add_and_flatten_udsp(config_udsp);
		mutex_unlock(&the_lnet.ln_api_mutex);
		return rc;
	}

	case IOC_LIBCFS_DEL_UDSP: {
		struct lnet_ioctl_config_udsp *del_udsp = arg;
		mutex_lock(&the_lnet.ln_api_mutex);
		/*
		 * delete the rule identified by index
		 */
		rc = lnet_del_udsp(del_udsp->udsp_idx);
		mutex_unlock(&the_lnet.ln_api_mutex);
		return rc;
	}

	case IOC_LIBCFS_GET_UDSP_SIZE: {
		struct lnet_ioctl_config_udsp *get_udsp = arg;
		mutex_lock(&the_lnet.ln_api_mutex);
		/*
		 * get the UDSP size specified by idx
		 */
		rc = lnet_get_udsp_num(get_udsp);
		mutex_unlock(&the_lnet.ln_api_mutex);
		return rc
	}

	case IOC_LIBCFS_GET_UDSP: {
		struct lnet_ioctl_config_udsp *get_udsp = arg;
		mutex_lock(&the_lnet.ln_api_mutex);
		/*
		 * get the udsp at index provided. Return -ENOENT if
		 * no more UDSPs to get
		 */
		rc = lnet_add_udsp(get_udsp, get_udsp->udsp_idx);
		mutex_unlock(&the_lnet.ln_api_mutex);
		return rc
	}
...
}