mirror of https://gitee.com/openkylin/linux.git
net: provide dev_lstats_add() helper
Many network drivers need it and hand-coded the same function. In order to ease u64_stats_t adoption, it is time to factorize. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -68,7 +68,6 @@ EXPORT_SYMBOL(blackhole_netdev);
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static netdev_tx_t loopback_xmit(struct sk_buff *skb,
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struct net_device *dev)
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{
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struct pcpu_lstats *lb_stats;
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int len;
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skb_tx_timestamp(skb);
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@ -85,16 +84,9 @@ static netdev_tx_t loopback_xmit(struct sk_buff *skb,
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skb->protocol = eth_type_trans(skb, dev);
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/* it's OK to use per_cpu_ptr() because BHs are off */
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lb_stats = this_cpu_ptr(dev->lstats);
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len = skb->len;
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if (likely(netif_rx(skb) == NET_RX_SUCCESS)) {
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u64_stats_update_begin(&lb_stats->syncp);
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lb_stats->bytes += len;
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lb_stats->packets++;
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u64_stats_update_end(&lb_stats->syncp);
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}
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if (likely(netif_rx(skb) == NET_RX_SUCCESS))
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dev_lstats_add(dev, len);
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return NETDEV_TX_OK;
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}
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@ -2403,6 +2403,16 @@ struct pcpu_lstats {
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void dev_lstats_read(struct net_device *dev, u64 *packets, u64 *bytes);
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static inline void dev_lstats_add(struct net_device *dev, unsigned int len)
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{
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struct pcpu_lstats *lstats = this_cpu_ptr(dev->lstats);
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u64_stats_update_begin(&lstats->syncp);
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lstats->bytes += len;
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lstats->packets++;
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u64_stats_update_end(&lstats->syncp);
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}
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#define __netdev_alloc_pcpu_stats(type, gfp) \
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({ \
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typeof(type) __percpu *pcpu_stats = alloc_percpu_gfp(type, gfp);\
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