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net/sched: act_csum: use per-core statistics 

use per-CPU counters, like other TC actions do, instead of maintaining one
set of stats across all cores. This allows updating act_csum stats without
the need of protecting them using spin_{,un}lock_bh() invocations.

Signed-off-by: Davide Caratti <dcaratti@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Davide Caratti 2018-01-22 18:14:31 +01:00 committed by David S. Miller
parent b76f4189df
commit f6052cf2fc
1 changed files with 4 additions and 6 deletions
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10
net/sched/act_csum.c
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@ -67,7 +67,7 @@ static int tcf_csum_init(struct net *net, struct nlattr *nla,
if (!tcf_idr_check(tn, parm->index, a, bind)) {
ret = tcf_idr_create(tn, parm->index, est, a,
&act_csum_ops, bind, false);
&act_csum_ops, bind, true);
if (ret)
return ret;
ret = ACT_P_CREATED;
@ -542,9 +542,9 @@ static int tcf_csum(struct sk_buff *skb, const struct tc_action *a,
int action;
u32 update_flags;
spin_lock(&p->tcf_lock);
tcf_lastuse_update(&p->tcf_tm);
bstats_update(&p->tcf_bstats, skb);
bstats_cpu_update(this_cpu_ptr(p->common.cpu_bstats), skb);
spin_lock(&p->tcf_lock);
action = p->tcf_action;
update_flags = p->update_flags;
spin_unlock(&p->tcf_lock);
@ -566,9 +566,7 @@ static int tcf_csum(struct sk_buff *skb, const struct tc_action *a,
return action;
drop:
spin_lock(&p->tcf_lock);
p->tcf_qstats.drops++;
spin_unlock(&p->tcf_lock);
qstats_drop_inc(this_cpu_ptr(p->common.cpu_qstats));
return TC_ACT_SHOT;
}