Function rte_eth_xstats_get

dpdk/lib/ethdev/rte_ethdev.c:3627–3675

}

int
rte_eth_xstats_get(uint16_t port_id, struct rte_eth_xstat *xstats,
	unsigned int n)
{
	struct rte_eth_dev *dev;
	unsigned int count, i;
	signed int xcount = 0;
	int ret;

	RTE_ETH_VALID_PORTID_OR_ERR_RET(port_id, -ENODEV);
	if (xstats == NULL && n > 0)
		return -EINVAL;
	dev = &rte_eth_devices[port_id];

	count = eth_dev_get_xstats_basic_count(dev);

	/* implemented by the driver */
	if (dev->dev_ops->xstats_get != NULL) {
		/* Retrieve the xstats from the driver at the end of the
		 * xstats struct.
		 */
		xcount = (*dev->dev_ops->xstats_get)(dev,
				     (n > count) ? xstats + count : NULL,
				     (n > count) ? n - count : 0);

		if (xcount < 0)
			return eth_err(port_id, xcount);
	}

	if (n < count + xcount || xstats == NULL)
		return count + xcount;

	/* now fill the xstats structure */
	ret = eth_basic_stats_get(port_id, xstats);
	if (ret < 0)
		return ret;
	count = ret;

	for (i = 0; i < count; i++)
		xstats[i].id = i;
	/* add an offset to driver-specific stats */
	for ( ; i < count + xcount; i++)
		xstats[i].id += count;

	for (i = 0; i < n; i++)
		rte_eth_trace_xstats_get(port_id, xstats[i]);

	return count + xcount;
}

/* reset ethdev extended statistics */
int