From 5665f48ef309d0189e97353a294b54af5d4a726c Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Wed, 8 Jun 2022 08:46:33 -0700 Subject: ipvlan: adopt u64_stats_t As explained in commit 316580b69d0a ("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 Signed-off-by: Jakub Kicinski --- drivers/net/ipvlan/ipvlan.h | 10 +++++----- drivers/net/ipvlan/ipvlan_core.c | 6 +++--- drivers/net/ipvlan/ipvlan_main.c | 18 +++++++++--------- 3 files changed, 17 insertions(+), 17 deletions(-) (limited to 'drivers/net/ipvlan') diff --git a/drivers/net/ipvlan/ipvlan.h b/drivers/net/ipvlan/ipvlan.h index 3837c897832e..de94921cbef9 100644 --- a/drivers/net/ipvlan/ipvlan.h +++ b/drivers/net/ipvlan/ipvlan.h @@ -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; diff --git a/drivers/net/ipvlan/ipvlan_core.c b/drivers/net/ipvlan/ipvlan_core.c index 6ffb27419e64..dfeb5b392e64 100644 --- a/drivers/net/ipvlan/ipvlan_core.c +++ b/drivers/net/ipvlan/ipvlan_core.c @@ -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); diff --git a/drivers/net/ipvlan/ipvlan_main.c b/drivers/net/ipvlan/ipvlan_main.c index aa28a29e228c..49ba8a50dfb1 100644 --- a/drivers/net/ipvlan/ipvlan_main.c +++ b/drivers/net/ipvlan/ipvlan_main.c @@ -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; -- cgit v1.2.3