net_sched: act_gact: use a separate packet counters for gact_determ()
Second step for gact RCU operation :
We want to get rid of the spinlock protecting gact operations.
Stats (packets/bytes) will soon be per cpu.
gact_determ() would not work without a central packet counter,
so lets add it for this mode.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Alexei Starovoitov <ast@plumgrid.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/sched/act_gact.c b/net/sched/act_gact.c
index 22a3a61..2f9bec5 100644
--- a/net/sched/act_gact.c
+++ b/net/sched/act_gact.c
@@ -36,8 +36,10 @@
static int gact_determ(struct tcf_gact *gact)
{
+ u32 pack = atomic_inc_return(&gact->packets);
+
smp_rmb(); /* coupled with smp_wmb() in tcf_gact_init() */
- if (gact->tcf_bstats.packets % gact->tcfg_pval)
+ if (pack % gact->tcfg_pval)
return gact->tcf_action;
return gact->tcfg_paction;
}
