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authorEric Dumazet <edumazet@google.com>2022-06-08 08:46:37 -0700
committerJakub Kicinski <kuba@kernel.org>2022-06-09 21:53:11 -0700
commit9962acefbcb92736c268aafe5f52200948f60f3e (patch)
treee9ebc87370b8817868a3fadbdfe1c1073709070c
parenteeb15885ca30669b354ac78eebb212743177ba4b (diff)
downloadlinux-9962acefbcb92736c268aafe5f52200948f60f3e.tar.bz2
net: adopt u64_stats_t in struct pcpu_sw_netstats
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. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
-rw-r--r--drivers/net/macsec.c8
-rw-r--r--drivers/net/usb/usbnet.c8
-rw-r--r--drivers/net/vxlan/vxlan_core.c8
-rw-r--r--include/linux/netdevice.h16
-rw-r--r--include/net/ip_tunnels.h4
-rw-r--r--net/bridge/br_netlink.c8
-rw-r--r--net/bridge/br_vlan.c36
-rw-r--r--net/core/dev.c18
-rw-r--r--net/dsa/slave.c8
9 files changed, 59 insertions, 55 deletions
diff --git a/drivers/net/macsec.c b/drivers/net/macsec.c
index 815738c0e067..c881e1bf6f6e 100644
--- a/drivers/net/macsec.c
+++ b/drivers/net/macsec.c
@@ -523,8 +523,8 @@ static void count_tx(struct net_device *dev, int ret, int len)
struct pcpu_sw_netstats *stats = this_cpu_ptr(dev->tstats);
u64_stats_update_begin(&stats->syncp);
- stats->tx_packets++;
- stats->tx_bytes += len;
+ u64_stats_inc(&stats->tx_packets);
+ u64_stats_add(&stats->tx_bytes, len);
u64_stats_update_end(&stats->syncp);
}
}
@@ -825,8 +825,8 @@ static void count_rx(struct net_device *dev, int len)
struct pcpu_sw_netstats *stats = this_cpu_ptr(dev->tstats);
u64_stats_update_begin(&stats->syncp);
- stats->rx_packets++;
- stats->rx_bytes += len;
+ u64_stats_inc(&stats->rx_packets);
+ u64_stats_add(&stats->rx_bytes, len);
u64_stats_update_end(&stats->syncp);
}
diff --git a/drivers/net/usb/usbnet.c b/drivers/net/usb/usbnet.c
index 1cb6dab3e2d0..dc79811535c2 100644
--- a/drivers/net/usb/usbnet.c
+++ b/drivers/net/usb/usbnet.c
@@ -337,8 +337,8 @@ void usbnet_skb_return (struct usbnet *dev, struct sk_buff *skb)
skb->protocol = eth_type_trans (skb, dev->net);
flags = u64_stats_update_begin_irqsave(&stats64->syncp);
- stats64->rx_packets++;
- stats64->rx_bytes += skb->len;
+ u64_stats_inc(&stats64->rx_packets);
+ u64_stats_add(&stats64->rx_bytes, skb->len);
u64_stats_update_end_irqrestore(&stats64->syncp, flags);
netif_dbg(dev, rx_status, dev->net, "< rx, len %zu, type 0x%x\n",
@@ -1258,8 +1258,8 @@ static void tx_complete (struct urb *urb)
unsigned long flags;
flags = u64_stats_update_begin_irqsave(&stats64->syncp);
- stats64->tx_packets += entry->packets;
- stats64->tx_bytes += entry->length;
+ u64_stats_add(&stats64->tx_packets, entry->packets);
+ u64_stats_add(&stats64->tx_bytes, entry->length);
u64_stats_update_end_irqrestore(&stats64->syncp, flags);
} else {
dev->net->stats.tx_errors++;
diff --git a/drivers/net/vxlan/vxlan_core.c b/drivers/net/vxlan/vxlan_core.c
index 265d4a0245e7..8b0710b576c2 100644
--- a/drivers/net/vxlan/vxlan_core.c
+++ b/drivers/net/vxlan/vxlan_core.c
@@ -2385,15 +2385,15 @@ static void vxlan_encap_bypass(struct sk_buff *skb, struct vxlan_dev *src_vxlan,
vxlan_snoop(dev, &loopback, eth_hdr(skb)->h_source, 0, vni);
u64_stats_update_begin(&tx_stats->syncp);
- tx_stats->tx_packets++;
- tx_stats->tx_bytes += len;
+ u64_stats_inc(&tx_stats->tx_packets);
+ u64_stats_add(&tx_stats->tx_bytes, len);
u64_stats_update_end(&tx_stats->syncp);
vxlan_vnifilter_count(src_vxlan, vni, NULL, VXLAN_VNI_STATS_TX, len);
if (__netif_rx(skb) == NET_RX_SUCCESS) {
u64_stats_update_begin(&rx_stats->syncp);
- rx_stats->rx_packets++;
- rx_stats->rx_bytes += len;
+ u64_stats_inc(&rx_stats->rx_packets);
+ u64_stats_add(&rx_stats->rx_bytes, len);
u64_stats_update_end(&rx_stats->syncp);
vxlan_vnifilter_count(dst_vxlan, vni, NULL, VXLAN_VNI_STATS_RX,
len);
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index e2e5088888b1..89afa4f7747d 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -2636,10 +2636,10 @@ struct packet_offload {
/* often modified stats are per-CPU, other are shared (netdev->stats) */
struct pcpu_sw_netstats {
- u64 rx_packets;
- u64 rx_bytes;
- u64 tx_packets;
- u64 tx_bytes;
+ u64_stats_t rx_packets;
+ u64_stats_t rx_bytes;
+ u64_stats_t tx_packets;
+ u64_stats_t tx_bytes;
struct u64_stats_sync syncp;
} __aligned(4 * sizeof(u64));
@@ -2656,8 +2656,8 @@ static inline void dev_sw_netstats_rx_add(struct net_device *dev, unsigned int l
struct pcpu_sw_netstats *tstats = this_cpu_ptr(dev->tstats);
u64_stats_update_begin(&tstats->syncp);
- tstats->rx_bytes += len;
- tstats->rx_packets++;
+ u64_stats_add(&tstats->rx_bytes, len);
+ u64_stats_inc(&tstats->rx_packets);
u64_stats_update_end(&tstats->syncp);
}
@@ -2668,8 +2668,8 @@ static inline void dev_sw_netstats_tx_add(struct net_device *dev,
struct pcpu_sw_netstats *tstats = this_cpu_ptr(dev->tstats);
u64_stats_update_begin(&tstats->syncp);
- tstats->tx_bytes += len;
- tstats->tx_packets += packets;
+ u64_stats_add(&tstats->tx_bytes, len);
+ u64_stats_add(&tstats->tx_packets, packets);
u64_stats_update_end(&tstats->syncp);
}
diff --git a/include/net/ip_tunnels.h b/include/net/ip_tunnels.h
index c24fa934221d..70cbc4a72669 100644
--- a/include/net/ip_tunnels.h
+++ b/include/net/ip_tunnels.h
@@ -456,8 +456,8 @@ static inline void iptunnel_xmit_stats(struct net_device *dev, int pkt_len)
struct pcpu_sw_netstats *tstats = get_cpu_ptr(dev->tstats);
u64_stats_update_begin(&tstats->syncp);
- tstats->tx_bytes += pkt_len;
- tstats->tx_packets++;
+ u64_stats_add(&tstats->tx_bytes, pkt_len);
+ u64_stats_inc(&tstats->tx_packets);
u64_stats_update_end(&tstats->syncp);
put_cpu_ptr(tstats);
} else {
diff --git a/net/bridge/br_netlink.c b/net/bridge/br_netlink.c
index bb01776d2d88..1ef14a099c6b 100644
--- a/net/bridge/br_netlink.c
+++ b/net/bridge/br_netlink.c
@@ -1770,10 +1770,10 @@ static int br_fill_linkxstats(struct sk_buff *skb,
if (v->vid == pvid)
vxi.flags |= BRIDGE_VLAN_INFO_PVID;
br_vlan_get_stats(v, &stats);
- vxi.rx_bytes = stats.rx_bytes;
- vxi.rx_packets = stats.rx_packets;
- vxi.tx_bytes = stats.tx_bytes;
- vxi.tx_packets = stats.tx_packets;
+ vxi.rx_bytes = u64_stats_read(&stats.rx_bytes);
+ vxi.rx_packets = u64_stats_read(&stats.rx_packets);
+ vxi.tx_bytes = u64_stats_read(&stats.tx_bytes);
+ vxi.tx_packets = u64_stats_read(&stats.tx_packets);
if (nla_put(skb, BRIDGE_XSTATS_VLAN, sizeof(vxi), &vxi))
goto nla_put_failure;
diff --git a/net/bridge/br_vlan.c b/net/bridge/br_vlan.c
index 0f5e75ccac79..6e53dc991409 100644
--- a/net/bridge/br_vlan.c
+++ b/net/bridge/br_vlan.c
@@ -505,8 +505,8 @@ struct sk_buff *br_handle_vlan(struct net_bridge *br,
if (br_opt_get(br, BROPT_VLAN_STATS_ENABLED)) {
stats = this_cpu_ptr(v->stats);
u64_stats_update_begin(&stats->syncp);
- stats->tx_bytes += skb->len;
- stats->tx_packets++;
+ u64_stats_add(&stats->tx_bytes, skb->len);
+ u64_stats_inc(&stats->tx_packets);
u64_stats_update_end(&stats->syncp);
}
@@ -624,8 +624,8 @@ static bool __allowed_ingress(const struct net_bridge *br,
if (br_opt_get(br, BROPT_VLAN_STATS_ENABLED)) {
stats = this_cpu_ptr(v->stats);
u64_stats_update_begin(&stats->syncp);
- stats->rx_bytes += skb->len;
- stats->rx_packets++;
+ u64_stats_add(&stats->rx_bytes, skb->len);
+ u64_stats_inc(&stats->rx_packets);
u64_stats_update_end(&stats->syncp);
}
@@ -1379,16 +1379,16 @@ void br_vlan_get_stats(const struct net_bridge_vlan *v,
cpu_stats = per_cpu_ptr(v->stats, i);
do {
start = u64_stats_fetch_begin_irq(&cpu_stats->syncp);
- rxpackets = cpu_stats->rx_packets;
- rxbytes = cpu_stats->rx_bytes;
- txbytes = cpu_stats->tx_bytes;
- txpackets = cpu_stats->tx_packets;
+ rxpackets = u64_stats_read(&cpu_stats->rx_packets);
+ rxbytes = u64_stats_read(&cpu_stats->rx_bytes);
+ txbytes = u64_stats_read(&cpu_stats->tx_bytes);
+ txpackets = u64_stats_read(&cpu_stats->tx_packets);
} while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, start));
- stats->rx_packets += rxpackets;
- stats->rx_bytes += rxbytes;
- stats->tx_bytes += txbytes;
- stats->tx_packets += txpackets;
+ u64_stats_add(&stats->rx_packets, rxpackets);
+ u64_stats_add(&stats->rx_bytes, rxbytes);
+ u64_stats_add(&stats->tx_bytes, txbytes);
+ u64_stats_add(&stats->tx_packets, txpackets);
}
}
@@ -1779,14 +1779,18 @@ static bool br_vlan_stats_fill(struct sk_buff *skb,
return false;
br_vlan_get_stats(v, &stats);
- if (nla_put_u64_64bit(skb, BRIDGE_VLANDB_STATS_RX_BYTES, stats.rx_bytes,
+ if (nla_put_u64_64bit(skb, BRIDGE_VLANDB_STATS_RX_BYTES,
+ u64_stats_read(&stats.rx_bytes),
BRIDGE_VLANDB_STATS_PAD) ||
nla_put_u64_64bit(skb, BRIDGE_VLANDB_STATS_RX_PACKETS,
- stats.rx_packets, BRIDGE_VLANDB_STATS_PAD) ||
- nla_put_u64_64bit(skb, BRIDGE_VLANDB_STATS_TX_BYTES, stats.tx_bytes,
+ u64_stats_read(&stats.rx_packets),
+ BRIDGE_VLANDB_STATS_PAD) ||
+ nla_put_u64_64bit(skb, BRIDGE_VLANDB_STATS_TX_BYTES,
+ u64_stats_read(&stats.tx_bytes),
BRIDGE_VLANDB_STATS_PAD) ||
nla_put_u64_64bit(skb, BRIDGE_VLANDB_STATS_TX_PACKETS,
- stats.tx_packets, BRIDGE_VLANDB_STATS_PAD))
+ u64_stats_read(&stats.tx_packets),
+ BRIDGE_VLANDB_STATS_PAD))
goto out_err;
nla_nest_end(skb, nest);
diff --git a/net/core/dev.c b/net/core/dev.c
index c9d96b85a825..511cf5d3aade 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -10459,23 +10459,23 @@ void dev_fetch_sw_netstats(struct rtnl_link_stats64 *s,
int cpu;
for_each_possible_cpu(cpu) {
+ u64 rx_packets, rx_bytes, tx_packets, tx_bytes;
const struct pcpu_sw_netstats *stats;
- struct pcpu_sw_netstats tmp;
unsigned int start;
stats = per_cpu_ptr(netstats, cpu);
do {
start = u64_stats_fetch_begin_irq(&stats->syncp);
- tmp.rx_packets = stats->rx_packets;
- tmp.rx_bytes = stats->rx_bytes;
- tmp.tx_packets = stats->tx_packets;
- tmp.tx_bytes = stats->tx_bytes;
+ rx_packets = u64_stats_read(&stats->rx_packets);
+ rx_bytes = u64_stats_read(&stats->rx_bytes);
+ tx_packets = u64_stats_read(&stats->tx_packets);
+ tx_bytes = u64_stats_read(&stats->tx_bytes);
} while (u64_stats_fetch_retry_irq(&stats->syncp, start));
- s->rx_packets += tmp.rx_packets;
- s->rx_bytes += tmp.rx_bytes;
- s->tx_packets += tmp.tx_packets;
- s->tx_bytes += tmp.tx_bytes;
+ s->rx_packets += rx_packets;
+ s->rx_bytes += rx_bytes;
+ s->tx_packets += tx_packets;
+ s->tx_bytes += tx_bytes;
}
}
EXPORT_SYMBOL_GPL(dev_fetch_sw_netstats);
diff --git a/net/dsa/slave.c b/net/dsa/slave.c
index 801a5d445833..2e1ac638d135 100644
--- a/net/dsa/slave.c
+++ b/net/dsa/slave.c
@@ -935,10 +935,10 @@ static void dsa_slave_get_ethtool_stats(struct net_device *dev,
s = per_cpu_ptr(dev->tstats, i);
do {
start = u64_stats_fetch_begin_irq(&s->syncp);
- tx_packets = s->tx_packets;
- tx_bytes = s->tx_bytes;
- rx_packets = s->rx_packets;
- rx_bytes = s->rx_bytes;
+ tx_packets = u64_stats_read(&s->tx_packets);
+ tx_bytes = u64_stats_read(&s->tx_bytes);
+ rx_packets = u64_stats_read(&s->rx_packets);
+ rx_bytes = u64_stats_read(&s->rx_bytes);
} while (u64_stats_fetch_retry_irq(&s->syncp, start));
data[0] += tx_packets;
data[1] += tx_bytes;