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