1/* SPDX-License-Identifier: GPL-2.0 */ 2#ifndef __NET_TC_WRAPPER_H 3#define __NET_TC_WRAPPER_H 4 5#include <net/pkt_cls.h> 6 7#if IS_ENABLED(CONFIG_MITIGATION_RETPOLINE) 8 9#include <linux/cpufeature.h> 10#include <linux/static_key.h> 11#include <linux/indirect_call_wrapper.h> 12 13#define TC_INDIRECT_SCOPE 14 15extern struct static_key_false tc_skip_wrapper; 16 17/* TC Actions */ 18#ifdef CONFIG_NET_CLS_ACT 19 20#define TC_INDIRECT_ACTION_DECLARE(fname) \ 21 INDIRECT_CALLABLE_DECLARE(int fname(struct sk_buff *skb, \ 22 const struct tc_action *a, \ 23 struct tcf_result *res)) 24 25TC_INDIRECT_ACTION_DECLARE(tcf_bpf_act); 26TC_INDIRECT_ACTION_DECLARE(tcf_connmark_act); 27TC_INDIRECT_ACTION_DECLARE(tcf_csum_act); 28TC_INDIRECT_ACTION_DECLARE(tcf_ct_act); 29TC_INDIRECT_ACTION_DECLARE(tcf_ctinfo_act); 30TC_INDIRECT_ACTION_DECLARE(tcf_gact_act); 31TC_INDIRECT_ACTION_DECLARE(tcf_gate_act); 32TC_INDIRECT_ACTION_DECLARE(tcf_ife_act); 33TC_INDIRECT_ACTION_DECLARE(tcf_ipt_act); 34TC_INDIRECT_ACTION_DECLARE(tcf_mirred_act); 35TC_INDIRECT_ACTION_DECLARE(tcf_mpls_act); 36TC_INDIRECT_ACTION_DECLARE(tcf_nat_act); 37TC_INDIRECT_ACTION_DECLARE(tcf_pedit_act); 38TC_INDIRECT_ACTION_DECLARE(tcf_police_act); 39TC_INDIRECT_ACTION_DECLARE(tcf_sample_act); 40TC_INDIRECT_ACTION_DECLARE(tcf_simp_act); 41TC_INDIRECT_ACTION_DECLARE(tcf_skbedit_act); 42TC_INDIRECT_ACTION_DECLARE(tcf_skbmod_act); 43TC_INDIRECT_ACTION_DECLARE(tcf_vlan_act); 44TC_INDIRECT_ACTION_DECLARE(tunnel_key_act); 45 46static inline int tc_act(struct sk_buff *skb, const struct tc_action *a, 47 struct tcf_result *res) 48{ 49 if (static_branch_likely(&tc_skip_wrapper)) 50 goto skip; 51 52#if IS_BUILTIN(CONFIG_NET_ACT_GACT) 53 if (a->ops->act == tcf_gact_act) 54 return tcf_gact_act(skb, a, res); 55#endif 56#if IS_BUILTIN(CONFIG_NET_ACT_MIRRED) 57 if (a->ops->act == tcf_mirred_act) 58 return tcf_mirred_act(skb, a, res); 59#endif 60#if IS_BUILTIN(CONFIG_NET_ACT_PEDIT) 61 if (a->ops->act == tcf_pedit_act) 62 return tcf_pedit_act(skb, a, res); 63#endif 64#if IS_BUILTIN(CONFIG_NET_ACT_SKBEDIT) 65 if (a->ops->act == tcf_skbedit_act) 66 return tcf_skbedit_act(skb, a, res); 67#endif 68#if IS_BUILTIN(CONFIG_NET_ACT_SKBMOD) 69 if (a->ops->act == tcf_skbmod_act) 70 return tcf_skbmod_act(skb, a, res); 71#endif 72#if IS_BUILTIN(CONFIG_NET_ACT_POLICE) 73 if (a->ops->act == tcf_police_act) 74 return tcf_police_act(skb, a, res); 75#endif 76#if IS_BUILTIN(CONFIG_NET_ACT_BPF) 77 if (a->ops->act == tcf_bpf_act) 78 return tcf_bpf_act(skb, a, res); 79#endif 80#if IS_BUILTIN(CONFIG_NET_ACT_CONNMARK) 81 if (a->ops->act == tcf_connmark_act) 82 return tcf_connmark_act(skb, a, res); 83#endif 84#if IS_BUILTIN(CONFIG_NET_ACT_CSUM) 85 if (a->ops->act == tcf_csum_act) 86 return tcf_csum_act(skb, a, res); 87#endif 88#if IS_BUILTIN(CONFIG_NET_ACT_CT) 89 if (a->ops->act == tcf_ct_act) 90 return tcf_ct_act(skb, a, res); 91#endif 92#if IS_BUILTIN(CONFIG_NET_ACT_CTINFO) 93 if (a->ops->act == tcf_ctinfo_act) 94 return tcf_ctinfo_act(skb, a, res); 95#endif 96#if IS_BUILTIN(CONFIG_NET_ACT_GATE) 97 if (a->ops->act == tcf_gate_act) 98 return tcf_gate_act(skb, a, res); 99#endif 100#if IS_BUILTIN(CONFIG_NET_ACT_MPLS) 101 if (a->ops->act == tcf_mpls_act) 102 return tcf_mpls_act(skb, a, res); 103#endif 104#if IS_BUILTIN(CONFIG_NET_ACT_NAT) 105 if (a->ops->act == tcf_nat_act) 106 return tcf_nat_act(skb, a, res); 107#endif 108#if IS_BUILTIN(CONFIG_NET_ACT_TUNNEL_KEY) 109 if (a->ops->act == tunnel_key_act) 110 return tunnel_key_act(skb, a, res); 111#endif 112#if IS_BUILTIN(CONFIG_NET_ACT_VLAN) 113 if (a->ops->act == tcf_vlan_act) 114 return tcf_vlan_act(skb, a, res); 115#endif 116#if IS_BUILTIN(CONFIG_NET_ACT_IFE) 117 if (a->ops->act == tcf_ife_act) 118 return tcf_ife_act(skb, a, res); 119#endif 120#if IS_BUILTIN(CONFIG_NET_ACT_SIMP) 121 if (a->ops->act == tcf_simp_act) 122 return tcf_simp_act(skb, a, res); 123#endif 124#if IS_BUILTIN(CONFIG_NET_ACT_SAMPLE) 125 if (a->ops->act == tcf_sample_act) 126 return tcf_sample_act(skb, a, res); 127#endif 128 129skip: 130 return a->ops->act(skb, a, res); 131} 132 133#endif /* CONFIG_NET_CLS_ACT */ 134 135/* TC Filters */ 136#ifdef CONFIG_NET_CLS 137 138#define TC_INDIRECT_FILTER_DECLARE(fname) \ 139 INDIRECT_CALLABLE_DECLARE(int fname(struct sk_buff *skb, \ 140 const struct tcf_proto *tp, \ 141 struct tcf_result *res)) 142 143TC_INDIRECT_FILTER_DECLARE(basic_classify); 144TC_INDIRECT_FILTER_DECLARE(cls_bpf_classify); 145TC_INDIRECT_FILTER_DECLARE(cls_cgroup_classify); 146TC_INDIRECT_FILTER_DECLARE(fl_classify); 147TC_INDIRECT_FILTER_DECLARE(flow_classify); 148TC_INDIRECT_FILTER_DECLARE(fw_classify); 149TC_INDIRECT_FILTER_DECLARE(mall_classify); 150TC_INDIRECT_FILTER_DECLARE(route4_classify); 151TC_INDIRECT_FILTER_DECLARE(u32_classify); 152 153static inline int tc_classify(struct sk_buff *skb, const struct tcf_proto *tp, 154 struct tcf_result *res) 155{ 156 if (static_branch_likely(&tc_skip_wrapper)) 157 goto skip; 158 159#if IS_BUILTIN(CONFIG_NET_CLS_BPF) 160 if (tp->classify == cls_bpf_classify) 161 return cls_bpf_classify(skb, tp, res); 162#endif 163#if IS_BUILTIN(CONFIG_NET_CLS_U32) 164 if (tp->classify == u32_classify) 165 return u32_classify(skb, tp, res); 166#endif 167#if IS_BUILTIN(CONFIG_NET_CLS_FLOWER) 168 if (tp->classify == fl_classify) 169 return fl_classify(skb, tp, res); 170#endif 171#if IS_BUILTIN(CONFIG_NET_CLS_FW) 172 if (tp->classify == fw_classify) 173 return fw_classify(skb, tp, res); 174#endif 175#if IS_BUILTIN(CONFIG_NET_CLS_MATCHALL) 176 if (tp->classify == mall_classify) 177 return mall_classify(skb, tp, res); 178#endif 179#if IS_BUILTIN(CONFIG_NET_CLS_BASIC) 180 if (tp->classify == basic_classify) 181 return basic_classify(skb, tp, res); 182#endif 183#if IS_BUILTIN(CONFIG_NET_CLS_CGROUP) 184 if (tp->classify == cls_cgroup_classify) 185 return cls_cgroup_classify(skb, tp, res); 186#endif 187#if IS_BUILTIN(CONFIG_NET_CLS_FLOW) 188 if (tp->classify == flow_classify) 189 return flow_classify(skb, tp, res); 190#endif 191#if IS_BUILTIN(CONFIG_NET_CLS_ROUTE4) 192 if (tp->classify == route4_classify) 193 return route4_classify(skb, tp, res); 194#endif 195 196skip: 197 return tp->classify(skb, tp, res); 198} 199 200#endif /* CONFIG_NET_CLS */ 201 202static inline void tc_wrapper_init(void) 203{ 204#ifdef CONFIG_X86 205 if (!cpu_feature_enabled(X86_FEATURE_RETPOLINE)) 206 static_branch_enable(&tc_skip_wrapper); 207#endif 208} 209 210#else 211 212#define TC_INDIRECT_SCOPE static 213 214static inline int tc_act(struct sk_buff *skb, const struct tc_action *a, 215 struct tcf_result *res) 216{ 217 return a->ops->act(skb, a, res); 218} 219 220static inline int tc_classify(struct sk_buff *skb, const struct tcf_proto *tp, 221 struct tcf_result *res) 222{ 223 return tp->classify(skb, tp, res); 224} 225 226static inline void tc_wrapper_init(void) 227{ 228} 229 230#endif 231 232#endif /* __NET_TC_WRAPPER_H */ 233