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Commit | Line | Data |
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3c731eba AS |
1 | /* eBPF mini library */ |
2 | #ifndef __LIBBPF_H | |
3 | #define __LIBBPF_H | |
4 | ||
5 | struct bpf_insn; | |
6 | ||
7 | int bpf_create_map(enum bpf_map_type map_type, int key_size, int value_size, | |
8 | int max_entries); | |
ffb65f27 | 9 | int bpf_update_elem(int fd, void *key, void *value, unsigned long long flags); |
3c731eba AS |
10 | int bpf_lookup_elem(int fd, void *key, void *value); |
11 | int bpf_delete_elem(int fd, void *key); | |
12 | int bpf_get_next_key(int fd, void *key, void *next_key); | |
13 | ||
14 | int bpf_prog_load(enum bpf_prog_type prog_type, | |
15 | const struct bpf_insn *insns, int insn_len, | |
b896c4f9 | 16 | const char *license, int kern_version); |
3c731eba | 17 | |
42984d7c DB |
18 | int bpf_obj_pin(int fd, const char *pathname); |
19 | int bpf_obj_get(const char *pathname); | |
20 | ||
a8085782 | 21 | #define LOG_BUF_SIZE 65536 |
3c731eba AS |
22 | extern char bpf_log_buf[LOG_BUF_SIZE]; |
23 | ||
24 | /* ALU ops on registers, bpf_add|sub|...: dst_reg += src_reg */ | |
25 | ||
26 | #define BPF_ALU64_REG(OP, DST, SRC) \ | |
27 | ((struct bpf_insn) { \ | |
28 | .code = BPF_ALU64 | BPF_OP(OP) | BPF_X, \ | |
29 | .dst_reg = DST, \ | |
30 | .src_reg = SRC, \ | |
31 | .off = 0, \ | |
32 | .imm = 0 }) | |
33 | ||
34 | #define BPF_ALU32_REG(OP, DST, SRC) \ | |
35 | ((struct bpf_insn) { \ | |
36 | .code = BPF_ALU | BPF_OP(OP) | BPF_X, \ | |
37 | .dst_reg = DST, \ | |
38 | .src_reg = SRC, \ | |
39 | .off = 0, \ | |
40 | .imm = 0 }) | |
41 | ||
42 | /* ALU ops on immediates, bpf_add|sub|...: dst_reg += imm32 */ | |
43 | ||
44 | #define BPF_ALU64_IMM(OP, DST, IMM) \ | |
45 | ((struct bpf_insn) { \ | |
46 | .code = BPF_ALU64 | BPF_OP(OP) | BPF_K, \ | |
47 | .dst_reg = DST, \ | |
48 | .src_reg = 0, \ | |
49 | .off = 0, \ | |
50 | .imm = IMM }) | |
51 | ||
52 | #define BPF_ALU32_IMM(OP, DST, IMM) \ | |
53 | ((struct bpf_insn) { \ | |
54 | .code = BPF_ALU | BPF_OP(OP) | BPF_K, \ | |
55 | .dst_reg = DST, \ | |
56 | .src_reg = 0, \ | |
57 | .off = 0, \ | |
58 | .imm = IMM }) | |
59 | ||
60 | /* Short form of mov, dst_reg = src_reg */ | |
61 | ||
62 | #define BPF_MOV64_REG(DST, SRC) \ | |
63 | ((struct bpf_insn) { \ | |
64 | .code = BPF_ALU64 | BPF_MOV | BPF_X, \ | |
65 | .dst_reg = DST, \ | |
66 | .src_reg = SRC, \ | |
67 | .off = 0, \ | |
68 | .imm = 0 }) | |
69 | ||
bf508877 AS |
70 | #define BPF_MOV32_REG(DST, SRC) \ |
71 | ((struct bpf_insn) { \ | |
72 | .code = BPF_ALU | BPF_MOV | BPF_X, \ | |
73 | .dst_reg = DST, \ | |
74 | .src_reg = SRC, \ | |
75 | .off = 0, \ | |
76 | .imm = 0 }) | |
77 | ||
3c731eba AS |
78 | /* Short form of mov, dst_reg = imm32 */ |
79 | ||
80 | #define BPF_MOV64_IMM(DST, IMM) \ | |
81 | ((struct bpf_insn) { \ | |
82 | .code = BPF_ALU64 | BPF_MOV | BPF_K, \ | |
83 | .dst_reg = DST, \ | |
84 | .src_reg = 0, \ | |
85 | .off = 0, \ | |
86 | .imm = IMM }) | |
87 | ||
88 | /* BPF_LD_IMM64 macro encodes single 'load 64-bit immediate' insn */ | |
89 | #define BPF_LD_IMM64(DST, IMM) \ | |
90 | BPF_LD_IMM64_RAW(DST, 0, IMM) | |
91 | ||
92 | #define BPF_LD_IMM64_RAW(DST, SRC, IMM) \ | |
93 | ((struct bpf_insn) { \ | |
94 | .code = BPF_LD | BPF_DW | BPF_IMM, \ | |
95 | .dst_reg = DST, \ | |
96 | .src_reg = SRC, \ | |
97 | .off = 0, \ | |
98 | .imm = (__u32) (IMM) }), \ | |
99 | ((struct bpf_insn) { \ | |
100 | .code = 0, /* zero is reserved opcode */ \ | |
101 | .dst_reg = 0, \ | |
102 | .src_reg = 0, \ | |
103 | .off = 0, \ | |
104 | .imm = ((__u64) (IMM)) >> 32 }) | |
105 | ||
f1a66f85 DB |
106 | #ifndef BPF_PSEUDO_MAP_FD |
107 | # define BPF_PSEUDO_MAP_FD 1 | |
108 | #endif | |
3c731eba AS |
109 | |
110 | /* pseudo BPF_LD_IMM64 insn used to refer to process-local map_fd */ | |
111 | #define BPF_LD_MAP_FD(DST, MAP_FD) \ | |
112 | BPF_LD_IMM64_RAW(DST, BPF_PSEUDO_MAP_FD, MAP_FD) | |
113 | ||
114 | ||
03f4723e AS |
115 | /* Direct packet access, R0 = *(uint *) (skb->data + imm32) */ |
116 | ||
117 | #define BPF_LD_ABS(SIZE, IMM) \ | |
118 | ((struct bpf_insn) { \ | |
119 | .code = BPF_LD | BPF_SIZE(SIZE) | BPF_ABS, \ | |
120 | .dst_reg = 0, \ | |
121 | .src_reg = 0, \ | |
122 | .off = 0, \ | |
123 | .imm = IMM }) | |
124 | ||
3c731eba AS |
125 | /* Memory load, dst_reg = *(uint *) (src_reg + off16) */ |
126 | ||
127 | #define BPF_LDX_MEM(SIZE, DST, SRC, OFF) \ | |
128 | ((struct bpf_insn) { \ | |
129 | .code = BPF_LDX | BPF_SIZE(SIZE) | BPF_MEM, \ | |
130 | .dst_reg = DST, \ | |
131 | .src_reg = SRC, \ | |
132 | .off = OFF, \ | |
133 | .imm = 0 }) | |
134 | ||
135 | /* Memory store, *(uint *) (dst_reg + off16) = src_reg */ | |
136 | ||
137 | #define BPF_STX_MEM(SIZE, DST, SRC, OFF) \ | |
138 | ((struct bpf_insn) { \ | |
139 | .code = BPF_STX | BPF_SIZE(SIZE) | BPF_MEM, \ | |
140 | .dst_reg = DST, \ | |
141 | .src_reg = SRC, \ | |
142 | .off = OFF, \ | |
143 | .imm = 0 }) | |
144 | ||
145 | /* Memory store, *(uint *) (dst_reg + off16) = imm32 */ | |
146 | ||
147 | #define BPF_ST_MEM(SIZE, DST, OFF, IMM) \ | |
148 | ((struct bpf_insn) { \ | |
149 | .code = BPF_ST | BPF_SIZE(SIZE) | BPF_MEM, \ | |
150 | .dst_reg = DST, \ | |
151 | .src_reg = 0, \ | |
152 | .off = OFF, \ | |
153 | .imm = IMM }) | |
154 | ||
155 | /* Conditional jumps against registers, if (dst_reg 'op' src_reg) goto pc + off16 */ | |
156 | ||
157 | #define BPF_JMP_REG(OP, DST, SRC, OFF) \ | |
158 | ((struct bpf_insn) { \ | |
159 | .code = BPF_JMP | BPF_OP(OP) | BPF_X, \ | |
160 | .dst_reg = DST, \ | |
161 | .src_reg = SRC, \ | |
162 | .off = OFF, \ | |
163 | .imm = 0 }) | |
164 | ||
165 | /* Conditional jumps against immediates, if (dst_reg 'op' imm32) goto pc + off16 */ | |
166 | ||
167 | #define BPF_JMP_IMM(OP, DST, IMM, OFF) \ | |
168 | ((struct bpf_insn) { \ | |
169 | .code = BPF_JMP | BPF_OP(OP) | BPF_K, \ | |
170 | .dst_reg = DST, \ | |
171 | .src_reg = 0, \ | |
172 | .off = OFF, \ | |
173 | .imm = IMM }) | |
174 | ||
175 | /* Raw code statement block */ | |
176 | ||
177 | #define BPF_RAW_INSN(CODE, DST, SRC, OFF, IMM) \ | |
178 | ((struct bpf_insn) { \ | |
179 | .code = CODE, \ | |
180 | .dst_reg = DST, \ | |
181 | .src_reg = SRC, \ | |
182 | .off = OFF, \ | |
183 | .imm = IMM }) | |
184 | ||
185 | /* Program exit */ | |
186 | ||
187 | #define BPF_EXIT_INSN() \ | |
188 | ((struct bpf_insn) { \ | |
189 | .code = BPF_JMP | BPF_EXIT, \ | |
190 | .dst_reg = 0, \ | |
191 | .src_reg = 0, \ | |
192 | .off = 0, \ | |
193 | .imm = 0 }) | |
194 | ||
03f4723e AS |
195 | /* create RAW socket and bind to interface 'name' */ |
196 | int open_raw_sock(const char *name); | |
197 | ||
b896c4f9 AS |
198 | struct perf_event_attr; |
199 | int perf_event_open(struct perf_event_attr *attr, int pid, int cpu, | |
200 | int group_fd, unsigned long flags); | |
3c731eba | 201 | #endif |