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net: add DEV_STATS_READ() helper

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[ Upstream commit 0b068c714c ]

Companion of DEV_STATS_INC() & DEV_STATS_ADD().

This is going to be used in the series.

Use it in macsec_get_stats64().

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Stable-dep-of: ff672b9ffe ("ipvlan: properly track tx_errors")
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Eric Dumazet 2023-09-21 08:52:16 +00:00 committed by Greg Kroah-Hartman
parent 4482b250c8
commit 76304c749e
2 changed files with 4 additions and 3 deletions
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6
drivers/net/macsec.c
View File

@ -2995,9 +2995,9 @@ static void macsec_get_stats64(struct net_device *dev,
s->tx_bytes += tmp.tx_bytes;
}
s->rx_dropped = atomic_long_read(&dev->stats.__rx_dropped);
s->tx_dropped = atomic_long_read(&dev->stats.__tx_dropped);
s->rx_errors = atomic_long_read(&dev->stats.__rx_errors);
s->rx_dropped = DEV_STATS_READ(dev, rx_dropped);
s->tx_dropped = DEV_STATS_READ(dev, tx_dropped);
s->rx_errors = DEV_STATS_READ(dev, rx_errors);
}
static int macsec_get_iflink(const struct net_device *dev)

1
include/linux/netdevice.h
View File

@ -4966,5 +4966,6 @@ extern struct net_device *blackhole_netdev;
#define DEV_STATS_INC(DEV, FIELD) atomic_long_inc(&(DEV)->stats.__##FIELD)
#define DEV_STATS_ADD(DEV, FIELD, VAL) \
atomic_long_add((VAL), &(DEV)->stats.__##FIELD)
#define DEV_STATS_READ(DEV, FIELD) atomic_long_read(&(DEV)->stats.__##FIELD)
#endif /* _LINUX_NETDEVICE_H */