net: add function dev_fetch_sw_netstats for fetching pcpu_sw_netstats

					struct rtnl_link_stats64 *storage);

void netdev_stats_to_stats64(struct rtnl_link_stats64 *stats64,

			     const struct net_device_stats *netdev_stats);

void dev_fetch_sw_netstats(struct rtnl_link_stats64 *s,

			   const struct pcpu_sw_netstats __percpu *netstats);

extern int		netdev_max_backlog;

extern int		netdev_tstamp_prequeue;

}

EXPORT_SYMBOL(dev_get_stats);

/**

 *	dev_fetch_sw_netstats - get per-cpu network device statistics

 *	@s: place to store stats

 *	@netstats: per-cpu network stats to read from

 *

 *	Read per-cpu network statistics and populate the related fields in @s.

 */

void dev_fetch_sw_netstats(struct rtnl_link_stats64 *s,

			   const struct pcpu_sw_netstats __percpu *netstats)

{

	int cpu;

	for_each_possible_cpu(cpu) {

		const struct pcpu_sw_netstats *stats;

		struct pcpu_sw_netstats tmp;

		unsigned int start;

		stats = per_cpu_ptr(netstats, cpu);

		do {

			start = u64_stats_fetch_begin_irq(&stats->syncp);

			tmp.rx_packets = stats->rx_packets;

			tmp.rx_bytes   = stats->rx_bytes;

			tmp.tx_packets = stats->tx_packets;

			tmp.tx_bytes   = stats->tx_bytes;

		} while (u64_stats_fetch_retry_irq(&stats->syncp, start));

		s->rx_packets += tmp.rx_packets;

		s->rx_bytes   += tmp.rx_bytes;

		s->tx_packets += tmp.tx_packets;

		s->tx_bytes   += tmp.tx_bytes;

	}

}

EXPORT_SYMBOL_GPL(dev_fetch_sw_netstats);

struct netdev_queue *dev_ingress_queue_create(struct net_device *dev)

{

	struct netdev_queue *queue = dev_ingress_queue(dev);