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OpenCloudOS-Kernel
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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>
This commit is contained in:
Eric Dumazet 2019-11-07 16:27:15 -08:00 committed by David S. Miller
parent de7d5084d8
commit dd5382a081
2 changed files with 12 additions and 10 deletions
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12
drivers/net/loopback.c
View File

@ -68,7 +68,6 @@ EXPORT_SYMBOL(blackhole_netdev);
static netdev_tx_t loopback_xmit(struct sk_buff *skb,
struct net_device *dev)
{
struct pcpu_lstats *lb_stats;
int len;
skb_tx_timestamp(skb);
@ -85,16 +84,9 @@ static netdev_tx_t loopback_xmit(struct sk_buff *skb,
skb->protocol = eth_type_trans(skb, dev);
/* it's OK to use per_cpu_ptr() because BHs are off */
lb_stats = this_cpu_ptr(dev->lstats);
len = skb->len;
if (likely(netif_rx(skb) == NET_RX_SUCCESS)) {
u64_stats_update_begin(&lb_stats->syncp);
lb_stats->bytes += len;
lb_stats->packets++;
u64_stats_update_end(&lb_stats->syncp);
}
if (likely(netif_rx(skb) == NET_RX_SUCCESS))
dev_lstats_add(dev, len);
return NETDEV_TX_OK;
}

10
include/linux/netdevice.h
View File

@ -2403,6 +2403,16 @@ struct pcpu_lstats {
void dev_lstats_read(struct net_device *dev, u64 *packets, u64 *bytes);
static inline void dev_lstats_add(struct net_device *dev, unsigned int len)
{
struct pcpu_lstats *lstats = this_cpu_ptr(dev->lstats);
u64_stats_update_begin(&lstats->syncp);
lstats->bytes += len;
lstats->packets++;
u64_stats_update_end(&lstats->syncp);
}
#define __netdev_alloc_pcpu_stats(type, gfp) \
({ \
typeof(type) __percpu *pcpu_stats = alloc_percpu_gfp(type, gfp);\