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From 7655593e3a1486274382a9a1448ce61428d6d670 Mon Sep 17 00:00:00 2001
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat, 16 Oct 2021 10:49:03 +0200
Subject: [PATCH 039/158] gen_stats: Add gnet_stats_add_queue().
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/5.15/older/patches-5.15.10-rt24.tar.xz
This function will replace __gnet_stats_copy_queue(). It reads all
arguments and adds them into the passed gnet_stats_queue argument.
In contrast to __gnet_stats_copy_queue() it also copies the qlen member.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
include/net/gen_stats.h | 3 +++
net/core/gen_stats.c | 32 ++++++++++++++++++++++++++++++++
2 files changed, 35 insertions(+)
diff --git a/include/net/gen_stats.h b/include/net/gen_stats.h
index 25740d004bdb..148f0ba85f25 100644
--- a/include/net/gen_stats.h
+++ b/include/net/gen_stats.h
@@ -62,6 +62,9 @@ int gnet_stats_copy_queue(struct gnet_dump *d,
void __gnet_stats_copy_queue(struct gnet_stats_queue *qstats,
const struct gnet_stats_queue __percpu *cpu_q,
const struct gnet_stats_queue *q, __u32 qlen);
+void gnet_stats_add_queue(struct gnet_stats_queue *qstats,
+ const struct gnet_stats_queue __percpu *cpu_q,
+ const struct gnet_stats_queue *q);
int gnet_stats_copy_app(struct gnet_dump *d, void *st, int len);
int gnet_stats_finish_copy(struct gnet_dump *d);
diff --git a/net/core/gen_stats.c b/net/core/gen_stats.c
index 25d7c0989b83..26c020a7ead4 100644
--- a/net/core/gen_stats.c
+++ b/net/core/gen_stats.c
@@ -321,6 +321,38 @@ void __gnet_stats_copy_queue(struct gnet_stats_queue *qstats,
}
EXPORT_SYMBOL(__gnet_stats_copy_queue);
+static void gnet_stats_add_queue_cpu(struct gnet_stats_queue *qstats,
+ const struct gnet_stats_queue __percpu *q)
+{
+ int i;
+
+ for_each_possible_cpu(i) {
+ const struct gnet_stats_queue *qcpu = per_cpu_ptr(q, i);
+
+ qstats->qlen += qcpu->backlog;
+ qstats->backlog += qcpu->backlog;
+ qstats->drops += qcpu->drops;
+ qstats->requeues += qcpu->requeues;
+ qstats->overlimits += qcpu->overlimits;
+ }
+}
+
+void gnet_stats_add_queue(struct gnet_stats_queue *qstats,
+ const struct gnet_stats_queue __percpu *cpu,
+ const struct gnet_stats_queue *q)
+{
+ if (cpu) {
+ gnet_stats_add_queue_cpu(qstats, cpu);
+ } else {
+ qstats->qlen += q->qlen;
+ qstats->backlog += q->backlog;
+ qstats->drops += q->drops;
+ qstats->requeues += q->requeues;
+ qstats->overlimits += q->overlimits;
+ }
+}
+EXPORT_SYMBOL(gnet_stats_add_queue);
+
/**
* gnet_stats_copy_queue - copy queue statistics into statistics TLV
* @d: dumping handle
--
2.33.1
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