Subject: [PATCH net-next v3 1/9] net/sched: optimize action stats api calls

From: Oz Shlomo <[email-masked]>
Date: Mon, 6 Feb 2023 15:54:34 +0200

Currently the hw action stats update is called from tcf_exts_hw_stats_update,
when a tc filter is dumped, and from tcf_action_copy_stats, when a hw
action is dumped.
However, the tcf_action_copy_stats is also called from tcf_action_dump.
As such, the hw action stats update cb is called 3 times for every
tc flower filter dump.

Move the tc action hw stats update from tcf_action_copy_stats to
tcf_dump_walker to update the hw action stats when tc action is dumped.

Signed-off-by: Oz Shlomo <[email-masked]>
Reviewed-by: Simon Horman <[email-masked]>
---
 net/sched/act_api.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/net/sched/act_api.c b/net/sched/act_api.c
index cd09ef49df22..f4fa6d7340f8 100644
--- a/net/sched/act_api.c
+++ b/net/sched/act_api.c
@@ -539,6 +539,8 @@ static int tcf_dump_walker(struct tcf_idrinfo *idrinfo, struct sk_buff *skb,
 			       (unsigned long)p->tcfa_tm.lastuse))
 			continue;
 
+		tcf_action_update_hw_stats(p);
+
 		nest = nla_nest_start_noflag(skb, n_i);
 		if (!nest) {
 			index--;
@@ -1539,9 +1541,6 @@ int tcf_action_copy_stats(struct sk_buff *skb, struct tc_action *p,
 	if (p == NULL)
 		goto errout;
 
-	/* update hw stats for this action */
-	tcf_action_update_hw_stats(p);
-
 	/* compat_mode being true specifies a call that is supposed
 	 * to add additional backward compatibility statistic TLVs.
 	 */
-- 
1.8.3.1