| 1 |
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| 2 | #ifndef __NET_TC_WRAPPER_H
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| 3 | #define __NET_TC_WRAPPER_H
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| 4 |
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| 5 | #include <net/pkt_cls.h>
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| 6 |
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| 7 | #if IS_ENABLED(CONFIG_MITIGATION_RETPOLINE)
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| 8 |
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| 9 | #include <linux/cpufeature.h>
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| 10 | #include <linux/static_key.h>
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| 11 | #include <linux/indirect_call_wrapper.h>
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| 12 |
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| 13 | #define TC_INDIRECT_SCOPE
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| 14 |
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| 15 | extern struct static_key_false tc_skip_wrapper_act;
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| 16 | extern struct static_key_false tc_skip_wrapper_cls;
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| 17 |
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| 18 |
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| 19 | #ifdef CONFIG_NET_CLS_ACT
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| 20 |
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| 21 | #define TC_INDIRECT_ACTION_DECLARE(fname) \
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| 22 | INDIRECT_CALLABLE_DECLARE(int fname(struct sk_buff *skb, \
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| 23 | const struct tc_action *a, \
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| 24 | struct tcf_result *res))
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| 25 |
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| 26 | TC_INDIRECT_ACTION_DECLARE(tcf_bpf_act);
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| 27 | TC_INDIRECT_ACTION_DECLARE(tcf_connmark_act);
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| 28 | TC_INDIRECT_ACTION_DECLARE(tcf_csum_act);
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| 29 | TC_INDIRECT_ACTION_DECLARE(tcf_ct_act);
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| 30 | TC_INDIRECT_ACTION_DECLARE(tcf_ctinfo_act);
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| 31 | TC_INDIRECT_ACTION_DECLARE(tcf_gact_act);
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| 32 | TC_INDIRECT_ACTION_DECLARE(tcf_gate_act);
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| 33 | TC_INDIRECT_ACTION_DECLARE(tcf_ife_act);
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| 34 | TC_INDIRECT_ACTION_DECLARE(tcf_ipt_act);
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| 35 | TC_INDIRECT_ACTION_DECLARE(tcf_mirred_act);
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| 36 | TC_INDIRECT_ACTION_DECLARE(tcf_mpls_act);
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| 37 | TC_INDIRECT_ACTION_DECLARE(tcf_nat_act);
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| 38 | TC_INDIRECT_ACTION_DECLARE(tcf_pedit_act);
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| 39 | TC_INDIRECT_ACTION_DECLARE(tcf_police_act);
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| 40 | TC_INDIRECT_ACTION_DECLARE(tcf_sample_act);
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| 41 | TC_INDIRECT_ACTION_DECLARE(tcf_simp_act);
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| 42 | TC_INDIRECT_ACTION_DECLARE(tcf_skbedit_act);
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| 43 | TC_INDIRECT_ACTION_DECLARE(tcf_skbmod_act);
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| 44 | TC_INDIRECT_ACTION_DECLARE(tcf_vlan_act);
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| 45 | TC_INDIRECT_ACTION_DECLARE(tunnel_key_act);
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| 46 |
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| 47 | static inline int tc_act(struct sk_buff *skb, const struct tc_action *a,
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| 48 | struct tcf_result *res)
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| 49 | {
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| 50 | if (static_branch_likely(&tc_skip_wrapper_act))
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| 51 | goto skip;
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| 52 |
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| 53 | #if IS_BUILTIN(CONFIG_NET_ACT_GACT)
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| 54 | if (a->ops->act == tcf_gact_act)
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| 55 | return tcf_gact_act(skb, a, res);
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| 56 | #endif
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| 57 | #if IS_BUILTIN(CONFIG_NET_ACT_MIRRED)
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| 58 | if (a->ops->act == tcf_mirred_act)
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| 59 | return tcf_mirred_act(skb, a, res);
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| 60 | #endif
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| 61 | #if IS_BUILTIN(CONFIG_NET_ACT_PEDIT)
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| 62 | if (a->ops->act == tcf_pedit_act)
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| 63 | return tcf_pedit_act(skb, a, res);
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| 64 | #endif
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| 65 | #if IS_BUILTIN(CONFIG_NET_ACT_SKBEDIT)
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| 66 | if (a->ops->act == tcf_skbedit_act)
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| 67 | return tcf_skbedit_act(skb, a, res);
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| 68 | #endif
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| 69 | #if IS_BUILTIN(CONFIG_NET_ACT_SKBMOD)
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| 70 | if (a->ops->act == tcf_skbmod_act)
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| 71 | return tcf_skbmod_act(skb, a, res);
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| 72 | #endif
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| 73 | #if IS_BUILTIN(CONFIG_NET_ACT_POLICE)
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| 74 | if (a->ops->act == tcf_police_act)
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| 75 | return tcf_police_act(skb, a, res);
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| 76 | #endif
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| 77 | #if IS_BUILTIN(CONFIG_NET_ACT_BPF)
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| 78 | if (a->ops->act == tcf_bpf_act)
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| 79 | return tcf_bpf_act(skb, a, res);
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| 80 | #endif
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| 81 | #if IS_BUILTIN(CONFIG_NET_ACT_CONNMARK)
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| 82 | if (a->ops->act == tcf_connmark_act)
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| 83 | return tcf_connmark_act(skb, a, res);
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| 84 | #endif
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| 85 | #if IS_BUILTIN(CONFIG_NET_ACT_CSUM)
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| 86 | if (a->ops->act == tcf_csum_act)
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| 87 | return tcf_csum_act(skb, a, res);
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| 88 | #endif
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| 89 | #if IS_BUILTIN(CONFIG_NET_ACT_CT)
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| 90 | if (a->ops->act == tcf_ct_act)
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| 91 | return tcf_ct_act(skb, a, res);
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| 92 | #endif
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| 93 | #if IS_BUILTIN(CONFIG_NET_ACT_CTINFO)
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| 94 | if (a->ops->act == tcf_ctinfo_act)
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| 95 | return tcf_ctinfo_act(skb, a, res);
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| 96 | #endif
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| 97 | #if IS_BUILTIN(CONFIG_NET_ACT_GATE)
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| 98 | if (a->ops->act == tcf_gate_act)
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| 99 | return tcf_gate_act(skb, a, res);
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| 100 | #endif
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| 101 | #if IS_BUILTIN(CONFIG_NET_ACT_MPLS)
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| 102 | if (a->ops->act == tcf_mpls_act)
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| 103 | return tcf_mpls_act(skb, a, res);
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| 104 | #endif
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| 105 | #if IS_BUILTIN(CONFIG_NET_ACT_NAT)
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| 106 | if (a->ops->act == tcf_nat_act)
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| 107 | return tcf_nat_act(skb, a, res);
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| 108 | #endif
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| 109 | #if IS_BUILTIN(CONFIG_NET_ACT_TUNNEL_KEY)
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| 110 | if (a->ops->act == tunnel_key_act)
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| 111 | return tunnel_key_act(skb, a, res);
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| 112 | #endif
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| 113 | #if IS_BUILTIN(CONFIG_NET_ACT_VLAN)
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| 114 | if (a->ops->act == tcf_vlan_act)
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| 115 | return tcf_vlan_act(skb, a, res);
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| 116 | #endif
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| 117 | #if IS_BUILTIN(CONFIG_NET_ACT_IFE)
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| 118 | if (a->ops->act == tcf_ife_act)
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| 119 | return tcf_ife_act(skb, a, res);
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| 120 | #endif
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| 121 | #if IS_BUILTIN(CONFIG_NET_ACT_SIMP)
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| 122 | if (a->ops->act == tcf_simp_act)
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| 123 | return tcf_simp_act(skb, a, res);
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| 124 | #endif
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| 125 | #if IS_BUILTIN(CONFIG_NET_ACT_SAMPLE)
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| 126 | if (a->ops->act == tcf_sample_act)
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| 127 | return tcf_sample_act(skb, a, res);
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| 128 | #endif
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| 129 |
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| 130 | skip:
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| 131 | return a->ops->act(skb, a, res);
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| 132 | }
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| 133 |
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| 134 | #endif
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| 135 |
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| 136 |
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| 137 | #ifdef CONFIG_NET_CLS
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| 138 |
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| 139 | #define TC_INDIRECT_FILTER_DECLARE(fname) \
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| 140 | INDIRECT_CALLABLE_DECLARE(int fname(struct sk_buff *skb, \
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| 141 | const struct tcf_proto *tp, \
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| 142 | struct tcf_result *res))
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| 143 |
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| 144 | TC_INDIRECT_FILTER_DECLARE(basic_classify);
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| 145 | TC_INDIRECT_FILTER_DECLARE(cls_bpf_classify);
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| 146 | TC_INDIRECT_FILTER_DECLARE(cls_cgroup_classify);
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| 147 | TC_INDIRECT_FILTER_DECLARE(fl_classify);
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| 148 | TC_INDIRECT_FILTER_DECLARE(flow_classify);
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| 149 | TC_INDIRECT_FILTER_DECLARE(fw_classify);
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| 150 | TC_INDIRECT_FILTER_DECLARE(mall_classify);
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| 151 | TC_INDIRECT_FILTER_DECLARE(route4_classify);
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| 152 | TC_INDIRECT_FILTER_DECLARE(u32_classify);
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| 153 |
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| 154 | static inline int tc_classify(struct sk_buff *skb, const struct tcf_proto *tp,
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| 155 | struct tcf_result *res)
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| 156 | {
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| 157 | if (static_branch_likely(&tc_skip_wrapper_cls))
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| 158 | goto skip;
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| 159 |
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| 160 | #if IS_BUILTIN(CONFIG_NET_CLS_BPF)
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| 161 | if (tp->classify == cls_bpf_classify)
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| 162 | return cls_bpf_classify(skb, tp, res);
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| 163 | #endif
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| 164 | #if IS_BUILTIN(CONFIG_NET_CLS_U32)
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| 165 | if (tp->classify == u32_classify)
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| 166 | return u32_classify(skb, tp, res);
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| 167 | #endif
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| 168 | #if IS_BUILTIN(CONFIG_NET_CLS_FLOWER)
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| 169 | if (tp->classify == fl_classify)
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| 170 | return fl_classify(skb, tp, res);
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| 171 | #endif
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| 172 | #if IS_BUILTIN(CONFIG_NET_CLS_FW)
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| 173 | if (tp->classify == fw_classify)
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| 174 | return fw_classify(skb, tp, res);
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| 175 | #endif
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| 176 | #if IS_BUILTIN(CONFIG_NET_CLS_MATCHALL)
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| 177 | if (tp->classify == mall_classify)
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| 178 | return mall_classify(skb, tp, res);
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| 179 | #endif
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| 180 | #if IS_BUILTIN(CONFIG_NET_CLS_BASIC)
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| 181 | if (tp->classify == basic_classify)
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| 182 | return basic_classify(skb, tp, res);
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| 183 | #endif
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| 184 | #if IS_BUILTIN(CONFIG_NET_CLS_CGROUP)
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| 185 | if (tp->classify == cls_cgroup_classify)
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| 186 | return cls_cgroup_classify(skb, tp, res);
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| 187 | #endif
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| 188 | #if IS_BUILTIN(CONFIG_NET_CLS_FLOW)
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| 189 | if (tp->classify == flow_classify)
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| 190 | return flow_classify(skb, tp, res);
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| 191 | #endif
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| 192 | #if IS_BUILTIN(CONFIG_NET_CLS_ROUTE4)
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| 193 | if (tp->classify == route4_classify)
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| 194 | return route4_classify(skb, tp, res);
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| 195 | #endif
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| 196 |
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| 197 | skip:
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| 198 | return tp->classify(skb, tp, res);
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| 199 | }
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| 200 |
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| 201 | #endif
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| 202 |
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| 203 | static inline void tc_wrapper_init(void)
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| 204 | {
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| 205 | #ifdef CONFIG_X86
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| 206 | int cnt_cls = IS_BUILTIN(CONFIG_NET_CLS_BPF) +
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| 207 | IS_BUILTIN(CONFIG_NET_CLS_U32) +
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| 208 | IS_BUILTIN(CONFIG_NET_CLS_FLOWER) +
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| 209 | IS_BUILTIN(CONFIG_NET_CLS_FW) +
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| 210 | IS_BUILTIN(CONFIG_NET_CLS_MATCHALL) +
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| 211 | IS_BUILTIN(CONFIG_NET_CLS_BASIC) +
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| 212 | IS_BUILTIN(CONFIG_NET_CLS_CGROUP) +
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| 213 | IS_BUILTIN(CONFIG_NET_CLS_FLOW) +
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| 214 | IS_BUILTIN(CONFIG_NET_CLS_ROUTE4);
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| 215 |
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| 216 | int cnt_act = IS_BUILTIN(CONFIG_NET_ACT_GACT) +
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| 217 | IS_BUILTIN(CONFIG_NET_ACT_MIRRED) +
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| 218 | IS_BUILTIN(CONFIG_NET_ACT_PEDIT) +
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| 219 | IS_BUILTIN(CONFIG_NET_ACT_SKBEDIT) +
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| 220 | IS_BUILTIN(CONFIG_NET_ACT_SKBMOD) +
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| 221 | IS_BUILTIN(CONFIG_NET_ACT_POLICE) +
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| 222 | IS_BUILTIN(CONFIG_NET_ACT_BPF) +
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| 223 | IS_BUILTIN(CONFIG_NET_ACT_CONNMARK) +
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| 224 | IS_BUILTIN(CONFIG_NET_ACT_CSUM) +
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| 225 | IS_BUILTIN(CONFIG_NET_ACT_CT) +
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| 226 | IS_BUILTIN(CONFIG_NET_ACT_CTINFO) +
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| 227 | IS_BUILTIN(CONFIG_NET_ACT_GATE) +
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| 228 | IS_BUILTIN(CONFIG_NET_ACT_MPLS) +
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| 229 | IS_BUILTIN(CONFIG_NET_ACT_NAT) +
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| 230 | IS_BUILTIN(CONFIG_NET_ACT_TUNNEL_KEY) +
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| 231 | IS_BUILTIN(CONFIG_NET_ACT_VLAN) +
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| 232 | IS_BUILTIN(CONFIG_NET_ACT_IFE) +
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| 233 | IS_BUILTIN(CONFIG_NET_ACT_SIMP) +
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| 234 | IS_BUILTIN(CONFIG_NET_ACT_SAMPLE);
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| 235 |
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| 236 | if (cpu_feature_enabled(X86_FEATURE_RETPOLINE))
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| 237 | return;
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| 238 |
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| 239 | if (cnt_cls > 1)
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| 240 | static_branch_enable(&tc_skip_wrapper_cls);
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| 241 |
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| 242 | if (cnt_act > 1)
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| 243 | static_branch_enable(&tc_skip_wrapper_act);
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| 244 | #endif
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| 245 | }
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| 246 |
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| 247 | #else
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| 248 |
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| 249 | #define TC_INDIRECT_SCOPE static
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| 250 |
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| 251 | static inline int tc_act(struct sk_buff *skb, const struct tc_action *a,
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| 252 | struct tcf_result *res)
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| 253 | {
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| 254 | return a->ops->act(skb, a, res);
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| 255 | }
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| 256 |
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| 257 | static inline int tc_classify(struct sk_buff *skb, const struct tcf_proto *tp,
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| 258 | struct tcf_result *res)
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| 259 | {
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| 260 | return tp->classify(skb, tp, res);
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| 261 | }
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| 262 |
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| 263 | static inline void tc_wrapper_init(void)
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| 264 | {
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| 265 | }
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| 266 |
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| 267 | #endif
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| 268 |
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| 269 | #endif
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