net: qos offload add flow status with dropped count

This patch adds a drop frames counter to tc flower offloading.
Reporting h/w dropped frames is necessary for some actions.
Some actions like police action and the coming introduced stream gate
action would produce dropped frames which is necessary for user. Status
update shows how many filtered packets increasing and how many dropped
in those packets.

v2: Changes
 - Update commit comments suggest by Jiri Pirko.

Signed-off-by: Po Liu <Po.Liu@nxp.com>
Reviewed-by: Simon Horman <simon.horman@netronome.com>
Reviewed-by: Vlad Buslov <vladbu@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/act_api.h b/include/net/act_api.h
index 8c39348..cb382a8 100644
--- a/include/net/act_api.h
+++ b/include/net/act_api.h
@@ -106,7 +106,7 @@ struct tc_action_ops {
 			struct netlink_callback *, int,
 			const struct tc_action_ops *,
 			struct netlink_ext_ack *);
-	void	(*stats_update)(struct tc_action *, u64, u32, u64, bool);
+	void	(*stats_update)(struct tc_action *, u64, u64, u64, u64, bool);
 	size_t  (*get_fill_size)(const struct tc_action *act);
 	struct net_device *(*get_dev)(const struct tc_action *a,
 				      tc_action_priv_destructor *destructor);
@@ -232,8 +232,8 @@ static inline void tcf_action_inc_overlimit_qstats(struct tc_action *a)
 	spin_unlock(&a->tcfa_lock);
 }
 
-void tcf_action_update_stats(struct tc_action *a, u64 bytes, u32 packets,
-			     bool drop, bool hw);
+void tcf_action_update_stats(struct tc_action *a, u64 bytes, u64 packets,
+			     u64 drops, bool hw);
 int tcf_action_copy_stats(struct sk_buff *, struct tc_action *, int);
 
 int tcf_action_check_ctrlact(int action, struct tcf_proto *tp,
@@ -244,13 +244,14 @@ struct tcf_chain *tcf_action_set_ctrlact(struct tc_action *a, int action,
 #endif /* CONFIG_NET_CLS_ACT */
 
 static inline void tcf_action_stats_update(struct tc_action *a, u64 bytes,
-					   u64 packets, u64 lastuse, bool hw)
+					   u64 packets, u64 drops,
+					   u64 lastuse, bool hw)
 {
 #ifdef CONFIG_NET_CLS_ACT
 	if (!a->ops->stats_update)
 		return;
 
-	a->ops->stats_update(a, bytes, packets, lastuse, hw);
+	a->ops->stats_update(a, bytes, packets, drops, lastuse, hw);
 #endif
 }