Function eth_dev_validate_offloads

dpdk/lib/ethdev/rte_ethdev.c:1201–1231

* Validate offloads that are requested through rte_eth_dev_configure against * the offloads successfully set by the Ethernet device. * * @param port_id * The port identifier of the Ethernet device. * @param req_offloads * The offloads that have been requested through `rte_eth_dev_configure`. * @param set_offloads * The offloads successfully set by the Ethernet device. * @param offlo

 *   - (-EINVAL) if requested offload has been silently disabled.
 */
static int
eth_dev_validate_offloads(uint16_t port_id, uint64_t req_offloads,
		  uint64_t set_offloads, const char *offload_type,
		  const char *(*offload_name)(uint64_t))
{
	uint64_t offloads_diff = req_offloads ^ set_offloads;
	uint64_t offload;
	int ret = 0;

	while (offloads_diff != 0) {
		/* Check if any offload is requested but not enabled. */
		offload = RTE_BIT64(rte_ctz64(offloads_diff));
		if (offload & req_offloads) {
			RTE_ETHDEV_LOG(ERR,
				"Port %u failed to enable %s offload %s\n",
				port_id, offload_type, offload_name(offload));
			ret = -EINVAL;
		}

		/* Check if offload couldn't be disabled. */
		if (offload & set_offloads) {
			RTE_ETHDEV_LOG(DEBUG,
				"Port %u %s offload %s is not requested but enabled\n",
				port_id, offload_type, offload_name(offload));
		}

		offloads_diff &= ~offload;
	}

	return ret;
}

static uint32_t
eth_dev_get_overhead_len(uint32_t max_rx_pktlen, uint16_t max_mtu)