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net: core: add dev_get_tstats64 as a ndo_get_stats64 implementation

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It's a frequent pattern to use netdev->stats for the less frequently
accessed counters and per-cpu counters for the frequently accessed
counters (rx/tx bytes/packets). Add a default ndo_get_stats64()
implementation for this use case.

Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Heiner Kallweit 2020-11-07 21:49:07 +01:00 committed by Jakub Kicinski
parent ca4d632aef
commit a18394269f
2 changed files with 16 additions and 0 deletions
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1
include/linux/netdevice.h
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@ -4527,6 +4527,7 @@ 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);
void dev_get_tstats64(struct net_device *dev, struct rtnl_link_stats64 *s);
extern int netdev_max_backlog;
extern int netdev_tstamp_prequeue;

15
net/core/dev.c
View file

@ -10366,6 +10366,21 @@ void dev_fetch_sw_netstats(struct rtnl_link_stats64 *s,
}
EXPORT_SYMBOL_GPL(dev_fetch_sw_netstats);
/**
* dev_get_tstats64 - ndo_get_stats64 implementation
* @dev: device to get statistics from
* @s: place to store stats
*
* Populate @s from dev->stats and dev->tstats. Can be used as
* ndo_get_stats64() callback.
*/
void dev_get_tstats64(struct net_device *dev, struct rtnl_link_stats64 *s)
{
netdev_stats_to_stats64(s, &dev->stats);
dev_fetch_sw_netstats(s, dev->tstats);
}
EXPORT_SYMBOL_GPL(dev_get_tstats64);
struct netdev_queue *dev_ingress_queue_create(struct net_device *dev)
{
struct netdev_queue *queue = dev_ingress_queue(dev);