[SRU][Focal][PATCH 3/3] net: sched: extract qstats update code into functions

[Yuxuan Luo]

From: Vlad Buslov <vladbu at mellanox.com>

Extract common code that increments cpu_qstats counters into standalone act
API functions. Change hardware offloaded actions that use percpu counter
allocation to use the new functions instead of accessing cpu_qstats
directly.

This commit doesn't change functionality.

Signed-off-by: Vlad Buslov <vladbu at mellanox.com>
Acked-by: Jiri Pirko <jiri at mellanox.com>
Signed-off-by: David S. Miller <davem at davemloft.net>
(cherry picked from commit 26b537a88ca5b7399c7ab0656e06dbd9da9513c1)
Signed-off-by: Yuxuan Luo <yuxuan.luo at canonical.com>
---
 include/net/act_api.h  | 15 +++++++++++++++
 net/sched/act_csum.c   |  2 +-
 net/sched/act_ct.c     |  2 +-
 net/sched/act_gact.c   |  2 +-
 net/sched/act_mirred.c |  2 +-
 net/sched/act_vlan.c   |  2 +-
 6 files changed, 20 insertions(+), 5 deletions(-)

diff --git a/include/net/act_api.h b/include/net/act_api.h
index 4dabe4730f00f..d9f9ae3803d58 100644
--- a/include/net/act_api.h
+++ b/include/net/act_api.h
@@ -186,6 +186,21 @@ int tcf_action_dump(struct sk_buff *skb, struct tc_action *actions[], int bind,
 		    int ref);
 int tcf_action_dump_old(struct sk_buff *skb, struct tc_action *a, int, int);
 int tcf_action_dump_1(struct sk_buff *skb, struct tc_action *a, int, int);
+static inline struct gnet_stats_queue *
+tcf_action_get_qstats(struct tc_action *a)
+{
+	return this_cpu_ptr(a->cpu_qstats);
+}
+
+static inline void tcf_action_inc_drop_qstats(struct tc_action *a)
+{
+	qstats_drop_inc(this_cpu_ptr(a->cpu_qstats));
+}
+
+static inline void tcf_action_inc_overlimit_qstats(struct tc_action *a)
+{
+	qstats_overlimit_inc(this_cpu_ptr(a->cpu_qstats));
+}
 int tcf_action_copy_stats(struct sk_buff *, struct tc_action *, int);
 
 int tcf_action_check_ctrlact(int action, struct tcf_proto *tp,
diff --git a/net/sched/act_csum.c b/net/sched/act_csum.c
index fa1b1fd10c441..a88f39c118194 100644
--- a/net/sched/act_csum.c
+++ b/net/sched/act_csum.c
@@ -621,7 +621,7 @@ static int tcf_csum_act(struct sk_buff *skb, const struct tc_action *a,
 	return action;
 
 drop:
-	qstats_drop_inc(this_cpu_ptr(p->common.cpu_qstats));
+	tcf_action_inc_drop_qstats(&p->common);
 	action = TC_ACT_SHOT;
 	goto out;
 }
diff --git a/net/sched/act_ct.c b/net/sched/act_ct.c
index 02d4491991b5e..2fbb7d08007dd 100644
--- a/net/sched/act_ct.c
+++ b/net/sched/act_ct.c
@@ -486,7 +486,7 @@ static int tcf_ct_act(struct sk_buff *skb, const struct tc_action *a,
 	return retval;
 
 drop:
-	qstats_drop_inc(this_cpu_ptr(a->cpu_qstats));
+	tcf_action_inc_drop_qstats(&c->common);
 	return TC_ACT_SHOT;
 }
 
diff --git a/net/sched/act_gact.c b/net/sched/act_gact.c
index faf68a44b8451..c80b8220845e5 100644
--- a/net/sched/act_gact.c
+++ b/net/sched/act_gact.c
@@ -161,7 +161,7 @@ static int tcf_gact_act(struct sk_buff *skb, const struct tc_action *a,
 #endif
 	bstats_cpu_update(this_cpu_ptr(gact->common.cpu_bstats), skb);
 	if (action == TC_ACT_SHOT)
-		qstats_drop_inc(this_cpu_ptr(gact->common.cpu_qstats));
+		tcf_action_inc_drop_qstats(&gact->common);
 
 	tcf_lastuse_update(&gact->tcf_tm);
 
diff --git a/net/sched/act_mirred.c b/net/sched/act_mirred.c
index bfed9b6ebe32d..88018b4ad57ba 100644
--- a/net/sched/act_mirred.c
+++ b/net/sched/act_mirred.c
@@ -324,7 +324,7 @@ static int tcf_mirred_act(struct sk_buff *skb, const struct tc_action *a,
 	err = tcf_mirred_forward(want_ingress, skb2);
 	if (err) {
 out:
-		qstats_overlimit_inc(this_cpu_ptr(m->common.cpu_qstats));
+		tcf_action_inc_overlimit_qstats(&m->common);
 		if (tcf_mirred_is_act_redirect(m_eaction))
 			retval = TC_ACT_SHOT;
 	}
diff --git a/net/sched/act_vlan.c b/net/sched/act_vlan.c
index 7dc76c68ec52d..65cbc1a2738e7 100644
--- a/net/sched/act_vlan.c
+++ b/net/sched/act_vlan.c
@@ -88,7 +88,7 @@ static int tcf_vlan_act(struct sk_buff *skb, const struct tc_action *a,
 	return action;
 
 drop:
-	qstats_drop_inc(this_cpu_ptr(v->common.cpu_qstats));
+	tcf_action_inc_drop_qstats(&v->common);
 	return TC_ACT_SHOT;
 }
 
-- 
2.34.1