Function mlx5_flow_item_acceptable

dpdk/drivers/net/mlx5/mlx5_flow.c:1558–1599

* Verify the @p item specifications (spec, last, mask) are compatible with the * NIC capabilities. * * @param[in] item * Item specification. * @param[in] mask * @p item->mask or flow default bit-masks. * @param[in] nic_mask * Bit-masks covering supported fields by the NIC to compare with user mask. * @param[in] size * Bit-masks size in bytes. * @param[in] range_accepted * Tru

 *   0 on success, a negative errno value otherwise and rte_errno is set.
 */
int
mlx5_flow_item_acceptable(const struct rte_flow_item *item,
			  const uint8_t *mask,
			  const uint8_t *nic_mask,
			  unsigned int size,
			  bool range_accepted,
			  struct rte_flow_error *error)
{
	unsigned int i;

	MLX5_ASSERT(nic_mask);
	for (i = 0; i < size; ++i)
		if ((nic_mask[i] | mask[i]) != nic_mask[i])
			return rte_flow_error_set(error, ENOTSUP,
						  RTE_FLOW_ERROR_TYPE_ITEM,
						  item,
						  "mask enables non supported"
						  " bits");
	if (!item->spec && (item->mask || item->last))
		return rte_flow_error_set(error, EINVAL,
					  RTE_FLOW_ERROR_TYPE_ITEM, item,
					  "mask/last without a spec is not"
					  " supported");
	if (item->spec && item->last && !range_accepted) {
		uint8_t spec[size];
		uint8_t last[size];
		unsigned int i;
		int ret;

		for (i = 0; i < size; ++i) {
			spec[i] = ((const uint8_t *)item->spec)[i] & mask[i];
			last[i] = ((const uint8_t *)item->last)[i] & mask[i];
		}
		ret = memcmp(spec, last, size);
		if (ret != 0)
			return rte_flow_error_set(error, EINVAL,
						  RTE_FLOW_ERROR_TYPE_ITEM,
						  item,
						  "range is not valid");
	}
	return 0;
}

/**
 * Adjust the hash fields according to the @p flow information.