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ipvlan: adopt u64_stats_t

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As explained in commit 316580b69d ("u64_stats: provide u64_stats_t type")
we should use u64_stats_t and related accessors to avoid load/store tearing.

Add READ_ONCE() when reading rx_errs & tx_drps.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Eric Dumazet 2022-06-08 08:46:33 -07:00 committed by Jakub Kicinski
parent 09cca53c16
commit 5665f48ef3
3 changed files with 17 additions and 17 deletions
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10
drivers/net/ipvlan/ipvlan.h
View File

@ -47,11 +47,11 @@ typedef enum {
} ipvl_hdr_type;
struct ipvl_pcpu_stats {
u64 rx_pkts;
u64 rx_bytes;
u64 rx_mcast;
u64 tx_pkts;
u64 tx_bytes;
u64_stats_t rx_pkts;
u64_stats_t rx_bytes;
u64_stats_t rx_mcast;
u64_stats_t tx_pkts;
u64_stats_t tx_bytes;
struct u64_stats_sync syncp;
u32 rx_errs;
u32 tx_drps;

6
drivers/net/ipvlan/ipvlan_core.c
View File

@ -19,10 +19,10 @@ void ipvlan_count_rx(const struct ipvl_dev *ipvlan,
pcptr = this_cpu_ptr(ipvlan->pcpu_stats);
u64_stats_update_begin(&pcptr->syncp);
pcptr->rx_pkts++;
pcptr->rx_bytes += len;
u64_stats_inc(&pcptr->rx_pkts);
u64_stats_add(&pcptr->rx_bytes, len);
if (mcast)
pcptr->rx_mcast++;
u64_stats_inc(&pcptr->rx_mcast);
u64_stats_update_end(&pcptr->syncp);
} else {
this_cpu_inc(ipvlan->pcpu_stats->rx_errs);

18
drivers/net/ipvlan/ipvlan_main.c
View File

@ -224,8 +224,8 @@ static netdev_tx_t ipvlan_start_xmit(struct sk_buff *skb,
pcptr = this_cpu_ptr(ipvlan->pcpu_stats);
u64_stats_update_begin(&pcptr->syncp);
pcptr->tx_pkts++;
pcptr->tx_bytes += skblen;
u64_stats_inc(&pcptr->tx_pkts);
u64_stats_add(&pcptr->tx_bytes, skblen);
u64_stats_update_end(&pcptr->syncp);
} else {
this_cpu_inc(ipvlan->pcpu_stats->tx_drps);
@ -300,11 +300,11 @@ static void ipvlan_get_stats64(struct net_device *dev,
pcptr = per_cpu_ptr(ipvlan->pcpu_stats, idx);
do {
strt= u64_stats_fetch_begin_irq(&pcptr->syncp);
rx_pkts = pcptr->rx_pkts;
rx_bytes = pcptr->rx_bytes;
rx_mcast = pcptr->rx_mcast;
tx_pkts = pcptr->tx_pkts;
tx_bytes = pcptr->tx_bytes;
rx_pkts = u64_stats_read(&pcptr->rx_pkts);
rx_bytes = u64_stats_read(&pcptr->rx_bytes);
rx_mcast = u64_stats_read(&pcptr->rx_mcast);
tx_pkts = u64_stats_read(&pcptr->tx_pkts);
tx_bytes = u64_stats_read(&pcptr->tx_bytes);
} while (u64_stats_fetch_retry_irq(&pcptr->syncp,
strt));
@ -315,8 +315,8 @@ static void ipvlan_get_stats64(struct net_device *dev,
s->tx_bytes += tx_bytes;
/* u32 values are updated without syncp protection. */
rx_errs += pcptr->rx_errs;
tx_drps += pcptr->tx_drps;
rx_errs += READ_ONCE(pcptr->rx_errs);
tx_drps += READ_ONCE(pcptr->tx_drps);
}
s->rx_errors = rx_errs;
s->rx_dropped = rx_errs;