[RFC PATCH 04/17] net: sched: provide per cpu qstat helpers

[John Fastabend]

The per cpu qstats support was added with per cpu bstat support which
is currently used by the ingress qdisc. This patch adds a set of
helpers needed to make other qdiscs that use qstats per cpu as well.

Signed-off-by: John Fastabend <john.r.fastab...@intel.com>
---
 include/net/sch_generic.h |   35 +++++++++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)

diff --git a/include/net/sch_generic.h b/include/net/sch_generic.h
index f5c8613..9531b81 100644
--- a/include/net/sch_generic.h
+++ b/include/net/sch_generic.h
@@ -590,12 +590,39 @@ static inline void qdisc_qstats_backlog_dec(struct Qdisc 
*sch,
        sch->qstats.backlog -= qdisc_pkt_len(skb);
 }
 
+static inline void qdisc_qstats_cpu_backlog_dec(struct Qdisc *sch,
+                                               const struct sk_buff *skb)
+{
+       this_cpu_sub(sch->cpu_qstats->backlog, qdisc_pkt_len(skb));
+}
+
 static inline void qdisc_qstats_backlog_inc(struct Qdisc *sch,
                                            const struct sk_buff *skb)
 {
        sch->qstats.backlog += qdisc_pkt_len(skb);
 }
 
+static inline void qdisc_qstats_cpu_backlog_inc(struct Qdisc *sch,
+                                               const struct sk_buff *skb)
+{
+       this_cpu_add(sch->cpu_qstats->backlog, qdisc_pkt_len(skb));
+}
+
+static inline void qdisc_qstats_cpu_qlen_inc(struct Qdisc *sch)
+{
+       this_cpu_inc(sch->cpu_qstats->qlen);
+}
+
+static inline void qdisc_qstats_cpu_qlen_dec(struct Qdisc *sch)
+{
+       this_cpu_dec(sch->cpu_qstats->qlen);
+}
+
+static inline void qdisc_qstats_cpu_requeues_inc(struct Qdisc *sch)
+{
+       this_cpu_inc(sch->cpu_qstats->requeues);
+}
+
 static inline void __qdisc_qstats_drop(struct Qdisc *sch, int count)
 {
        sch->qstats.drops += count;
@@ -800,6 +827,14 @@ static inline void rtnl_qdisc_drop(struct sk_buff *skb, 
struct Qdisc *sch)
        qdisc_qstats_drop(sch);
 }
 
+static inline int qdisc_drop_cpu(struct sk_buff *skb, struct Qdisc *sch,
+                                struct sk_buff **to_free)
+{
+       __qdisc_drop(skb, to_free);
+       qdisc_qstats_cpu_drop(sch);
+
+       return NET_XMIT_DROP;
+}
 
 static inline int qdisc_drop(struct sk_buff *skb, struct Qdisc *sch,
                             struct sk_buff **to_free)