net/sched: add retpoline wrapper for tc
On kernels using retpoline as a spectrev2 mitigation,
optimize actions and filters that are compiled as built-ins into a direct call.
On subsequent patches we expose the classifiers and actions functions
and wire up the wrapper into tc.
Signed-off-by: Pedro Tammela <pctammela@mojatatu.com>
Reviewed-by: Jamal Hadi Salim <jhs@mojatatu.com>
Reviewed-by: Victor Nogueira <victor@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/sched/sch_api.c b/net/sched/sch_api.c
index 4a27dfb..2317db0 100644
--- a/net/sched/sch_api.c
+++ b/net/sched/sch_api.c
@@ -31,6 +31,7 @@
#include <net/netlink.h>
#include <net/pkt_sched.h>
#include <net/pkt_cls.h>
+#include <net/tc_wrapper.h>
#include <trace/events/qdisc.h>
@@ -2273,6 +2274,8 @@ static struct pernet_operations psched_net_ops = {
.exit = psched_net_exit,
};
+DEFINE_STATIC_KEY_FALSE(tc_skip_wrapper);
+
static int __init pktsched_init(void)
{
int err;
@@ -2300,6 +2303,8 @@ static int __init pktsched_init(void)
rtnl_register(PF_UNSPEC, RTM_GETTCLASS, tc_ctl_tclass, tc_dump_tclass,
0);
+ tc_wrapper_init();
+
return 0;
}
