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-rw-r--r--include/linux/netdevice.h175
1 files changed, 139 insertions, 36 deletions
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index f53ea7038441..cd7a597c55b1 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -28,6 +28,7 @@
#include <linux/prefetch.h>
#include <asm/cache.h>
#include <asm/byteorder.h>
+#include <asm/local.h>
#include <linux/percpu.h>
#include <linux/rculist.h>
@@ -194,6 +195,14 @@ struct net_device_stats {
unsigned long tx_compressed;
};
+/* per-cpu stats, allocated on demand.
+ * Try to fit them in a single cache line, for dev_get_stats() sake.
+ */
+struct net_device_core_stats {
+ local_t rx_dropped;
+ local_t tx_dropped;
+ local_t rx_nohandler;
+} __aligned(4 * sizeof(local_t));
#include <linux/cache.h>
#include <linux/skbuff.h>
@@ -1735,12 +1744,8 @@ enum netdev_ml_priv_type {
* @stats: Statistics struct, which was left as a legacy, use
* rtnl_link_stats64 instead
*
- * @rx_dropped: Dropped packets by core network,
- * do not use this in drivers
- * @tx_dropped: Dropped packets by core network,
+ * @core_stats: core networking counters,
* do not use this in drivers
- * @rx_nohandler: nohandler dropped packets by core network on
- * inactive devices, do not use this in drivers
* @carrier_up_count: Number of times the carrier has been up
* @carrier_down_count: Number of times the carrier has been down
*
@@ -1894,6 +1899,8 @@ enum netdev_ml_priv_type {
* @garp_port: GARP
* @mrp_port: MRP
*
+ * @dm_private: Drop monitor private
+ *
* @dev: Class/net/name entry
* @sysfs_groups: Space for optional device, statistics and wireless
* sysfs groups
@@ -1948,6 +1955,9 @@ enum netdev_ml_priv_type {
* @dev_addr_shadow: Copy of @dev_addr to catch direct writes.
* @linkwatch_dev_tracker: refcount tracker used by linkwatch.
* @watchdog_dev_tracker: refcount tracker used by watchdog.
+ * @dev_registered_tracker: tracker for reference held while
+ * registered
+ * @offload_xstats_l3: L3 HW stats for this netdevice.
*
* FIXME: cleanup struct net_device such that network protocol info
* moves out.
@@ -2020,9 +2030,7 @@ struct net_device {
struct net_device_stats stats; /* not used by modern drivers */
- atomic_long_t rx_dropped;
- atomic_long_t tx_dropped;
- atomic_long_t rx_nohandler;
+ struct net_device_core_stats __percpu *core_stats;
/* Stats to monitor link on/off, flapping */
atomic_t carrier_up_count;
@@ -2234,7 +2242,9 @@ struct net_device {
#if IS_ENABLED(CONFIG_MRP)
struct mrp_port __rcu *mrp_port;
#endif
-
+#if IS_ENABLED(CONFIG_NET_DROP_MONITOR)
+ struct dm_hw_stat_delta __rcu *dm_private;
+#endif
struct device dev;
const struct attribute_group *sysfs_groups[4];
const struct attribute_group *sysfs_rx_queue_group;
@@ -2282,6 +2292,8 @@ struct net_device {
u8 dev_addr_shadow[MAX_ADDR_LEN];
netdevice_tracker linkwatch_dev_tracker;
netdevice_tracker watchdog_dev_tracker;
+ netdevice_tracker dev_registered_tracker;
+ struct rtnl_hw_stats64 *offload_xstats_l3;
};
#define to_net_dev(d) container_of(d, struct net_device, dev)
@@ -2722,6 +2734,10 @@ enum netdev_cmd {
NETDEV_CVLAN_FILTER_DROP_INFO,
NETDEV_SVLAN_FILTER_PUSH_INFO,
NETDEV_SVLAN_FILTER_DROP_INFO,
+ NETDEV_OFFLOAD_XSTATS_ENABLE,
+ NETDEV_OFFLOAD_XSTATS_DISABLE,
+ NETDEV_OFFLOAD_XSTATS_REPORT_USED,
+ NETDEV_OFFLOAD_XSTATS_REPORT_DELTA,
};
const char *netdev_cmd_to_name(enum netdev_cmd cmd);
@@ -2772,6 +2788,42 @@ struct netdev_notifier_pre_changeaddr_info {
const unsigned char *dev_addr;
};
+enum netdev_offload_xstats_type {
+ NETDEV_OFFLOAD_XSTATS_TYPE_L3 = 1,
+};
+
+struct netdev_notifier_offload_xstats_info {
+ struct netdev_notifier_info info; /* must be first */
+ enum netdev_offload_xstats_type type;
+
+ union {
+ /* NETDEV_OFFLOAD_XSTATS_REPORT_DELTA */
+ struct netdev_notifier_offload_xstats_rd *report_delta;
+ /* NETDEV_OFFLOAD_XSTATS_REPORT_USED */
+ struct netdev_notifier_offload_xstats_ru *report_used;
+ };
+};
+
+int netdev_offload_xstats_enable(struct net_device *dev,
+ enum netdev_offload_xstats_type type,
+ struct netlink_ext_ack *extack);
+int netdev_offload_xstats_disable(struct net_device *dev,
+ enum netdev_offload_xstats_type type);
+bool netdev_offload_xstats_enabled(const struct net_device *dev,
+ enum netdev_offload_xstats_type type);
+int netdev_offload_xstats_get(struct net_device *dev,
+ enum netdev_offload_xstats_type type,
+ struct rtnl_hw_stats64 *stats, bool *used,
+ struct netlink_ext_ack *extack);
+void
+netdev_offload_xstats_report_delta(struct netdev_notifier_offload_xstats_rd *rd,
+ const struct rtnl_hw_stats64 *stats);
+void
+netdev_offload_xstats_report_used(struct netdev_notifier_offload_xstats_ru *ru);
+void netdev_offload_xstats_push_delta(struct net_device *dev,
+ enum netdev_offload_xstats_type type,
+ const struct rtnl_hw_stats64 *stats);
+
static inline void netdev_notifier_info_init(struct netdev_notifier_info *info,
struct net_device *dev)
{
@@ -3614,7 +3666,6 @@ static inline unsigned int get_netdev_rx_queue_index(
}
#endif
-#define DEFAULT_MAX_NUM_RSS_QUEUES (8)
int netif_get_num_default_rss_queues(void);
enum skb_free_reason {
@@ -3669,8 +3720,8 @@ u32 bpf_prog_run_generic_xdp(struct sk_buff *skb, struct xdp_buff *xdp,
void generic_xdp_tx(struct sk_buff *skb, struct bpf_prog *xdp_prog);
int do_xdp_generic(struct bpf_prog *xdp_prog, struct sk_buff *skb);
int netif_rx(struct sk_buff *skb);
-int netif_rx_ni(struct sk_buff *skb);
-int netif_rx_any_context(struct sk_buff *skb);
+int __netif_rx(struct sk_buff *skb);
+
int netif_receive_skb(struct sk_buff *skb);
int netif_receive_skb_core(struct sk_buff *skb);
void netif_receive_skb_list_internal(struct list_head *head);
@@ -3792,13 +3843,42 @@ static __always_inline bool __is_skb_forwardable(const struct net_device *dev,
return false;
}
+struct net_device_core_stats *netdev_core_stats_alloc(struct net_device *dev);
+
+static inline struct net_device_core_stats *dev_core_stats(struct net_device *dev)
+{
+ /* This READ_ONCE() pairs with the write in netdev_core_stats_alloc() */
+ struct net_device_core_stats __percpu *p = READ_ONCE(dev->core_stats);
+
+ if (likely(p))
+ return this_cpu_ptr(p);
+
+ return netdev_core_stats_alloc(dev);
+}
+
+#define DEV_CORE_STATS_INC(FIELD) \
+static inline void dev_core_stats_##FIELD##_inc(struct net_device *dev) \
+{ \
+ struct net_device_core_stats *p; \
+ \
+ preempt_disable(); \
+ p = dev_core_stats(dev); \
+ \
+ if (p) \
+ local_inc(&p->FIELD); \
+ preempt_enable(); \
+}
+DEV_CORE_STATS_INC(rx_dropped)
+DEV_CORE_STATS_INC(tx_dropped)
+DEV_CORE_STATS_INC(rx_nohandler)
+
static __always_inline int ____dev_forward_skb(struct net_device *dev,
struct sk_buff *skb,
const bool check_mtu)
{
if (skb_orphan_frags(skb, GFP_ATOMIC) ||
unlikely(!__is_skb_forwardable(dev, skb, check_mtu))) {
- atomic_long_inc(&dev->rx_dropped);
+ dev_core_stats_rx_dropped_inc(dev);
kfree_skb(skb);
return NET_RX_DROP;
}
@@ -3817,14 +3897,7 @@ extern unsigned int netdev_budget_usecs;
/* Called by rtnetlink.c:rtnl_unlock() */
void netdev_run_todo(void);
-/**
- * dev_put - release reference to device
- * @dev: network device
- *
- * Release reference to device to allow it to be freed.
- * Try using dev_put_track() instead.
- */
-static inline void dev_put(struct net_device *dev)
+static inline void __dev_put(struct net_device *dev)
{
if (dev) {
#ifdef CONFIG_PCPU_DEV_REFCNT
@@ -3835,14 +3908,7 @@ static inline void dev_put(struct net_device *dev)
}
}
-/**
- * dev_hold - get reference to device
- * @dev: network device
- *
- * Hold reference to device to keep it from being freed.
- * Try using dev_hold_track() instead.
- */
-static inline void dev_hold(struct net_device *dev)
+static inline void __dev_hold(struct net_device *dev)
{
if (dev) {
#ifdef CONFIG_PCPU_DEV_REFCNT
@@ -3853,11 +3919,24 @@ static inline void dev_hold(struct net_device *dev)
}
}
+static inline void __netdev_tracker_alloc(struct net_device *dev,
+ netdevice_tracker *tracker,
+ gfp_t gfp)
+{
+#ifdef CONFIG_NET_DEV_REFCNT_TRACKER
+ ref_tracker_alloc(&dev->refcnt_tracker, tracker, gfp);
+#endif
+}
+
+/* netdev_tracker_alloc() can upgrade a prior untracked reference
+ * taken by dev_get_by_name()/dev_get_by_index() to a tracked one.
+ */
static inline void netdev_tracker_alloc(struct net_device *dev,
netdevice_tracker *tracker, gfp_t gfp)
{
#ifdef CONFIG_NET_DEV_REFCNT_TRACKER
- ref_tracker_alloc(&dev->refcnt_tracker, tracker, gfp);
+ refcount_dec(&dev->refcnt_tracker.no_tracker);
+ __netdev_tracker_alloc(dev, tracker, gfp);
#endif
}
@@ -3873,8 +3952,8 @@ static inline void dev_hold_track(struct net_device *dev,
netdevice_tracker *tracker, gfp_t gfp)
{
if (dev) {
- dev_hold(dev);
- netdev_tracker_alloc(dev, tracker, gfp);
+ __dev_hold(dev);
+ __netdev_tracker_alloc(dev, tracker, gfp);
}
}
@@ -3883,10 +3962,34 @@ static inline void dev_put_track(struct net_device *dev,
{
if (dev) {
netdev_tracker_free(dev, tracker);
- dev_put(dev);
+ __dev_put(dev);
}
}
+/**
+ * dev_hold - get reference to device
+ * @dev: network device
+ *
+ * Hold reference to device to keep it from being freed.
+ * Try using dev_hold_track() instead.
+ */
+static inline void dev_hold(struct net_device *dev)
+{
+ dev_hold_track(dev, NULL, GFP_ATOMIC);
+}
+
+/**
+ * dev_put - release reference to device
+ * @dev: network device
+ *
+ * Release reference to device to allow it to be freed.
+ * Try using dev_put_track() instead.
+ */
+static inline void dev_put(struct net_device *dev)
+{
+ dev_put_track(dev, NULL);
+}
+
static inline void dev_replace_track(struct net_device *odev,
struct net_device *ndev,
netdevice_tracker *tracker,
@@ -3895,11 +3998,11 @@ static inline void dev_replace_track(struct net_device *odev,
if (odev)
netdev_tracker_free(odev, tracker);
- dev_hold(ndev);
- dev_put(odev);
+ __dev_hold(ndev);
+ __dev_put(odev);
if (ndev)
- netdev_tracker_alloc(ndev, tracker, gfp);
+ __netdev_tracker_alloc(ndev, tracker, gfp);
}
/* Carrier loss detection, dial on demand. The functions netif_carrier_on