linux/include/net/tc_wrapper.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __NET_TC_WRAPPER_H
#define __NET_TC_WRAPPER_H

#include <net/pkt_cls.h>

#if IS_ENABLED(CONFIG_MITIGATION_RETPOLINE)

#include <linux/cpufeature.h>
#include <linux/static_key.h>
#include <linux/indirect_call_wrapper.h>

#define TC_INDIRECT_SCOPE

extern struct static_key_false tc_skip_wrapper;

/* TC Actions */
#ifdef CONFIG_NET_CLS_ACT

#define TC_INDIRECT_ACTION_DECLARE(fname) …

TC_INDIRECT_ACTION_DECLARE(tcf_bpf_act);
TC_INDIRECT_ACTION_DECLARE(tcf_connmark_act);
TC_INDIRECT_ACTION_DECLARE(tcf_csum_act);
TC_INDIRECT_ACTION_DECLARE(tcf_ct_act);
TC_INDIRECT_ACTION_DECLARE(tcf_ctinfo_act);
TC_INDIRECT_ACTION_DECLARE(tcf_gact_act);
TC_INDIRECT_ACTION_DECLARE(tcf_gate_act);
TC_INDIRECT_ACTION_DECLARE(tcf_ife_act);
TC_INDIRECT_ACTION_DECLARE(tcf_ipt_act);
TC_INDIRECT_ACTION_DECLARE(tcf_mirred_act);
TC_INDIRECT_ACTION_DECLARE(tcf_mpls_act);
TC_INDIRECT_ACTION_DECLARE(tcf_nat_act);
TC_INDIRECT_ACTION_DECLARE(tcf_pedit_act);
TC_INDIRECT_ACTION_DECLARE(tcf_police_act);
TC_INDIRECT_ACTION_DECLARE(tcf_sample_act);
TC_INDIRECT_ACTION_DECLARE(tcf_simp_act);
TC_INDIRECT_ACTION_DECLARE(tcf_skbedit_act);
TC_INDIRECT_ACTION_DECLARE(tcf_skbmod_act);
TC_INDIRECT_ACTION_DECLARE(tcf_vlan_act);
TC_INDIRECT_ACTION_DECLARE(tunnel_key_act);

static inline int tc_act(struct sk_buff *skb, const struct tc_action *a,
			   struct tcf_result *res)
{ … }

#endif /* CONFIG_NET_CLS_ACT */

/* TC Filters */
#ifdef CONFIG_NET_CLS

#define TC_INDIRECT_FILTER_DECLARE(fname) …

TC_INDIRECT_FILTER_DECLARE(basic_classify);
TC_INDIRECT_FILTER_DECLARE(cls_bpf_classify);
TC_INDIRECT_FILTER_DECLARE(cls_cgroup_classify);
TC_INDIRECT_FILTER_DECLARE(fl_classify);
TC_INDIRECT_FILTER_DECLARE(flow_classify);
TC_INDIRECT_FILTER_DECLARE(fw_classify);
TC_INDIRECT_FILTER_DECLARE(mall_classify);
TC_INDIRECT_FILTER_DECLARE(route4_classify);
TC_INDIRECT_FILTER_DECLARE(u32_classify);

static inline int tc_classify(struct sk_buff *skb, const struct tcf_proto *tp,
				struct tcf_result *res)
{ … }

#endif /* CONFIG_NET_CLS */

static inline void tc_wrapper_init(void)
{ … }

#else

#define TC_INDIRECT_SCOPE …

static inline int tc_act(struct sk_buff *skb, const struct tc_action *a,
			   struct tcf_result *res)
{
	return a->ops->act(skb, a, res);
}

static inline int tc_classify(struct sk_buff *skb, const struct tcf_proto *tp,
				struct tcf_result *res)
{
	return tp->classify(skb, tp, res);
}

static inline void tc_wrapper_init(void)
{
}

#endif

#endif /* __NET_TC_WRAPPER_H */