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_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 15 extern 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 25 TC_INDIRECT_ACTION_DECLARE(tcf_bpf_act); 26 TC_INDIRECT_ACTION_DECLARE(tcf_connmark_act); 27 TC_INDIRECT_ACTION_DECLARE(tcf_csum_act); 28 TC_INDIRECT_ACTION_DECLARE(tcf_ct_act); 29 TC_INDIRECT_ACTION_DECLARE(tcf_ctinfo_act); 30 TC_INDIRECT_ACTION_DECLARE(tcf_gact_act); 31 TC_INDIRECT_ACTION_DECLARE(tcf_gate_act); 32 TC_INDIRECT_ACTION_DECLARE(tcf_ife_act); 33 TC_INDIRECT_ACTION_DECLARE(tcf_ipt_act); 34 TC_INDIRECT_ACTION_DECLARE(tcf_mirred_act); 35 TC_INDIRECT_ACTION_DECLARE(tcf_mpls_act); 36 TC_INDIRECT_ACTION_DECLARE(tcf_nat_act); 37 TC_INDIRECT_ACTION_DECLARE(tcf_pedit_act); 38 TC_INDIRECT_ACTION_DECLARE(tcf_police_act); 39 TC_INDIRECT_ACTION_DECLARE(tcf_sample_act); 40 TC_INDIRECT_ACTION_DECLARE(tcf_simp_act); 41 TC_INDIRECT_ACTION_DECLARE(tcf_skbedit_act); 42 TC_INDIRECT_ACTION_DECLARE(tcf_skbmod_act); 43 TC_INDIRECT_ACTION_DECLARE(tcf_vlan_act); 44 TC_INDIRECT_ACTION_DECLARE(tunnel_key_act); 45 46 static 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_IPT) 121 if (a->ops->act == tcf_ipt_act) 122 return tcf_ipt_act(skb, a, res); 123 #endif 124 #if IS_BUILTIN(CONFIG_NET_ACT_SIMP) 125 if (a->ops->act == tcf_simp_act) 126 return tcf_simp_act(skb, a, res); 127 #endif 128 #if IS_BUILTIN(CONFIG_NET_ACT_SAMPLE) 129 if (a->ops->act == tcf_sample_act) 130 return tcf_sample_act(skb, a, res); 131 #endif 132 133 skip: 134 return a->ops->act(skb, a, res); 135 } 136 137 #endif /* CONFIG_NET_CLS_ACT */ 138 139 /* TC Filters */ 140 #ifdef CONFIG_NET_CLS 141 142 #define TC_INDIRECT_FILTER_DECLARE(fname) \ 143 INDIRECT_CALLABLE_DECLARE(int fname(struct sk_buff *skb, \ 144 const struct tcf_proto *tp, \ 145 struct tcf_result *res)) 146 147 TC_INDIRECT_FILTER_DECLARE(basic_classify); 148 TC_INDIRECT_FILTER_DECLARE(cls_bpf_classify); 149 TC_INDIRECT_FILTER_DECLARE(cls_cgroup_classify); 150 TC_INDIRECT_FILTER_DECLARE(fl_classify); 151 TC_INDIRECT_FILTER_DECLARE(flow_classify); 152 TC_INDIRECT_FILTER_DECLARE(fw_classify); 153 TC_INDIRECT_FILTER_DECLARE(mall_classify); 154 TC_INDIRECT_FILTER_DECLARE(route4_classify); 155 TC_INDIRECT_FILTER_DECLARE(u32_classify); 156 157 static inline int tc_classify(struct sk_buff *skb, const struct tcf_proto *tp, 158 struct tcf_result *res) 159 { 160 if (static_branch_likely(&tc_skip_wrapper)) 161 goto skip; 162 163 #if IS_BUILTIN(CONFIG_NET_CLS_BPF) 164 if (tp->classify == cls_bpf_classify) 165 return cls_bpf_classify(skb, tp, res); 166 #endif 167 #if IS_BUILTIN(CONFIG_NET_CLS_U32) 168 if (tp->classify == u32_classify) 169 return u32_classify(skb, tp, res); 170 #endif 171 #if IS_BUILTIN(CONFIG_NET_CLS_FLOWER) 172 if (tp->classify == fl_classify) 173 return fl_classify(skb, tp, res); 174 #endif 175 #if IS_BUILTIN(CONFIG_NET_CLS_FW) 176 if (tp->classify == fw_classify) 177 return fw_classify(skb, tp, res); 178 #endif 179 #if IS_BUILTIN(CONFIG_NET_CLS_MATCHALL) 180 if (tp->classify == mall_classify) 181 return mall_classify(skb, tp, res); 182 #endif 183 #if IS_BUILTIN(CONFIG_NET_CLS_BASIC) 184 if (tp->classify == basic_classify) 185 return basic_classify(skb, tp, res); 186 #endif 187 #if IS_BUILTIN(CONFIG_NET_CLS_CGROUP) 188 if (tp->classify == cls_cgroup_classify) 189 return cls_cgroup_classify(skb, tp, res); 190 #endif 191 #if IS_BUILTIN(CONFIG_NET_CLS_FLOW) 192 if (tp->classify == flow_classify) 193 return flow_classify(skb, tp, res); 194 #endif 195 #if IS_BUILTIN(CONFIG_NET_CLS_ROUTE4) 196 if (tp->classify == route4_classify) 197 return route4_classify(skb, tp, res); 198 #endif 199 200 skip: 201 return tp->classify(skb, tp, res); 202 } 203 204 #endif /* CONFIG_NET_CLS */ 205 206 static inline void tc_wrapper_init(void) 207 { 208 #ifdef CONFIG_X86 209 if (!cpu_feature_enabled(X86_FEATURE_RETPOLINE)) 210 static_branch_enable(&tc_skip_wrapper); 211 #endif 212 } 213 214 #else 215 216 #define TC_INDIRECT_SCOPE static 217 218 static inline int tc_act(struct sk_buff *skb, const struct tc_action *a, 219 struct tcf_result *res) 220 { 221 return a->ops->act(skb, a, res); 222 } 223 224 static inline int tc_classify(struct sk_buff *skb, const struct tcf_proto *tp, 225 struct tcf_result *res) 226 { 227 return tp->classify(skb, tp, res); 228 } 229 230 static inline void tc_wrapper_init(void) 231 { 232 } 233 234 #endif 235 236 #endif /* __NET_TC_WRAPPER_H */ 237