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Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * Linux Socket Filter Data Structures | |
3 | */ | |
1da177e4 LT |
4 | #ifndef __LINUX_FILTER_H__ |
5 | #define __LINUX_FILTER_H__ | |
6 | ||
60063497 | 7 | #include <linux/atomic.h> |
0c5fe1b4 | 8 | #include <linux/compat.h> |
9f12fbe6 | 9 | #include <linux/skbuff.h> |
d45ed4a4 | 10 | #include <linux/workqueue.h> |
607ca46e | 11 | #include <uapi/linux/filter.h> |
792d4b5c | 12 | |
bd4cf0ed AS |
13 | /* Internally used and optimized filter representation with extended |
14 | * instruction set based on top of classic BPF. | |
0c5fe1b4 | 15 | */ |
bd4cf0ed AS |
16 | |
17 | /* instruction classes */ | |
18 | #define BPF_ALU64 0x07 /* alu mode in double word width */ | |
19 | ||
20 | /* ld/ldx fields */ | |
21 | #define BPF_DW 0x18 /* double word */ | |
22 | #define BPF_XADD 0xc0 /* exclusive add */ | |
23 | ||
24 | /* alu/jmp fields */ | |
25 | #define BPF_MOV 0xb0 /* mov reg to reg */ | |
26 | #define BPF_ARSH 0xc0 /* sign extending arithmetic shift right */ | |
27 | ||
28 | /* change endianness of a register */ | |
29 | #define BPF_END 0xd0 /* flags for endianness conversion: */ | |
30 | #define BPF_TO_LE 0x00 /* convert to little-endian */ | |
31 | #define BPF_TO_BE 0x08 /* convert to big-endian */ | |
32 | #define BPF_FROM_LE BPF_TO_LE | |
33 | #define BPF_FROM_BE BPF_TO_BE | |
34 | ||
35 | #define BPF_JNE 0x50 /* jump != */ | |
36 | #define BPF_JSGT 0x60 /* SGT is signed '>', GT in x86 */ | |
37 | #define BPF_JSGE 0x70 /* SGE is signed '>=', GE in x86 */ | |
38 | #define BPF_CALL 0x80 /* function call */ | |
39 | #define BPF_EXIT 0x90 /* function return */ | |
40 | ||
30743837 DB |
41 | /* Register numbers */ |
42 | enum { | |
43 | BPF_REG_0 = 0, | |
44 | BPF_REG_1, | |
45 | BPF_REG_2, | |
46 | BPF_REG_3, | |
47 | BPF_REG_4, | |
48 | BPF_REG_5, | |
49 | BPF_REG_6, | |
50 | BPF_REG_7, | |
51 | BPF_REG_8, | |
52 | BPF_REG_9, | |
53 | BPF_REG_10, | |
54 | __MAX_BPF_REG, | |
55 | }; | |
56 | ||
bd4cf0ed | 57 | /* BPF has 10 general purpose 64-bit registers and stack frame. */ |
30743837 DB |
58 | #define MAX_BPF_REG __MAX_BPF_REG |
59 | ||
60 | /* ArgX, context and stack frame pointer register positions. Note, | |
61 | * Arg1, Arg2, Arg3, etc are used as argument mappings of function | |
62 | * calls in BPF_CALL instruction. | |
63 | */ | |
64 | #define BPF_REG_ARG1 BPF_REG_1 | |
65 | #define BPF_REG_ARG2 BPF_REG_2 | |
66 | #define BPF_REG_ARG3 BPF_REG_3 | |
67 | #define BPF_REG_ARG4 BPF_REG_4 | |
68 | #define BPF_REG_ARG5 BPF_REG_5 | |
69 | #define BPF_REG_CTX BPF_REG_6 | |
70 | #define BPF_REG_FP BPF_REG_10 | |
71 | ||
72 | /* Additional register mappings for converted user programs. */ | |
73 | #define BPF_REG_A BPF_REG_0 | |
74 | #define BPF_REG_X BPF_REG_7 | |
75 | #define BPF_REG_TMP BPF_REG_8 | |
bd4cf0ed AS |
76 | |
77 | /* BPF program can access up to 512 bytes of stack space. */ | |
78 | #define MAX_BPF_STACK 512 | |
79 | ||
f8f6d679 DB |
80 | /* Helper macros for filter block array initializers. */ |
81 | ||
e430f34e | 82 | /* ALU ops on registers, bpf_add|sub|...: dst_reg += src_reg */ |
f8f6d679 | 83 | |
e430f34e | 84 | #define BPF_ALU64_REG(OP, DST, SRC) \ |
2695fb55 | 85 | ((struct bpf_insn) { \ |
f8f6d679 | 86 | .code = BPF_ALU64 | BPF_OP(OP) | BPF_X, \ |
e430f34e AS |
87 | .dst_reg = DST, \ |
88 | .src_reg = SRC, \ | |
f8f6d679 DB |
89 | .off = 0, \ |
90 | .imm = 0 }) | |
91 | ||
e430f34e | 92 | #define BPF_ALU32_REG(OP, DST, SRC) \ |
2695fb55 | 93 | ((struct bpf_insn) { \ |
f8f6d679 | 94 | .code = BPF_ALU | BPF_OP(OP) | BPF_X, \ |
e430f34e AS |
95 | .dst_reg = DST, \ |
96 | .src_reg = SRC, \ | |
f8f6d679 DB |
97 | .off = 0, \ |
98 | .imm = 0 }) | |
99 | ||
e430f34e | 100 | /* ALU ops on immediates, bpf_add|sub|...: dst_reg += imm32 */ |
f8f6d679 | 101 | |
e430f34e | 102 | #define BPF_ALU64_IMM(OP, DST, IMM) \ |
2695fb55 | 103 | ((struct bpf_insn) { \ |
f8f6d679 | 104 | .code = BPF_ALU64 | BPF_OP(OP) | BPF_K, \ |
e430f34e AS |
105 | .dst_reg = DST, \ |
106 | .src_reg = 0, \ | |
f8f6d679 DB |
107 | .off = 0, \ |
108 | .imm = IMM }) | |
109 | ||
e430f34e | 110 | #define BPF_ALU32_IMM(OP, DST, IMM) \ |
2695fb55 | 111 | ((struct bpf_insn) { \ |
f8f6d679 | 112 | .code = BPF_ALU | BPF_OP(OP) | BPF_K, \ |
e430f34e AS |
113 | .dst_reg = DST, \ |
114 | .src_reg = 0, \ | |
f8f6d679 DB |
115 | .off = 0, \ |
116 | .imm = IMM }) | |
117 | ||
118 | /* Endianess conversion, cpu_to_{l,b}e(), {l,b}e_to_cpu() */ | |
119 | ||
e430f34e | 120 | #define BPF_ENDIAN(TYPE, DST, LEN) \ |
2695fb55 | 121 | ((struct bpf_insn) { \ |
f8f6d679 | 122 | .code = BPF_ALU | BPF_END | BPF_SRC(TYPE), \ |
e430f34e AS |
123 | .dst_reg = DST, \ |
124 | .src_reg = 0, \ | |
f8f6d679 DB |
125 | .off = 0, \ |
126 | .imm = LEN }) | |
127 | ||
e430f34e | 128 | /* Short form of mov, dst_reg = src_reg */ |
f8f6d679 | 129 | |
e430f34e | 130 | #define BPF_MOV64_REG(DST, SRC) \ |
2695fb55 | 131 | ((struct bpf_insn) { \ |
f8f6d679 | 132 | .code = BPF_ALU64 | BPF_MOV | BPF_X, \ |
e430f34e AS |
133 | .dst_reg = DST, \ |
134 | .src_reg = SRC, \ | |
f8f6d679 DB |
135 | .off = 0, \ |
136 | .imm = 0 }) | |
137 | ||
e430f34e | 138 | #define BPF_MOV32_REG(DST, SRC) \ |
2695fb55 | 139 | ((struct bpf_insn) { \ |
f8f6d679 | 140 | .code = BPF_ALU | BPF_MOV | BPF_X, \ |
e430f34e AS |
141 | .dst_reg = DST, \ |
142 | .src_reg = SRC, \ | |
f8f6d679 DB |
143 | .off = 0, \ |
144 | .imm = 0 }) | |
145 | ||
e430f34e | 146 | /* Short form of mov, dst_reg = imm32 */ |
f8f6d679 | 147 | |
e430f34e | 148 | #define BPF_MOV64_IMM(DST, IMM) \ |
2695fb55 | 149 | ((struct bpf_insn) { \ |
f8f6d679 | 150 | .code = BPF_ALU64 | BPF_MOV | BPF_K, \ |
e430f34e AS |
151 | .dst_reg = DST, \ |
152 | .src_reg = 0, \ | |
f8f6d679 DB |
153 | .off = 0, \ |
154 | .imm = IMM }) | |
155 | ||
e430f34e | 156 | #define BPF_MOV32_IMM(DST, IMM) \ |
2695fb55 | 157 | ((struct bpf_insn) { \ |
f8f6d679 | 158 | .code = BPF_ALU | BPF_MOV | BPF_K, \ |
e430f34e AS |
159 | .dst_reg = DST, \ |
160 | .src_reg = 0, \ | |
f8f6d679 DB |
161 | .off = 0, \ |
162 | .imm = IMM }) | |
163 | ||
e430f34e | 164 | /* Short form of mov based on type, BPF_X: dst_reg = src_reg, BPF_K: dst_reg = imm32 */ |
f8f6d679 | 165 | |
e430f34e | 166 | #define BPF_MOV64_RAW(TYPE, DST, SRC, IMM) \ |
2695fb55 | 167 | ((struct bpf_insn) { \ |
f8f6d679 | 168 | .code = BPF_ALU64 | BPF_MOV | BPF_SRC(TYPE), \ |
e430f34e AS |
169 | .dst_reg = DST, \ |
170 | .src_reg = SRC, \ | |
f8f6d679 DB |
171 | .off = 0, \ |
172 | .imm = IMM }) | |
173 | ||
e430f34e | 174 | #define BPF_MOV32_RAW(TYPE, DST, SRC, IMM) \ |
2695fb55 | 175 | ((struct bpf_insn) { \ |
f8f6d679 | 176 | .code = BPF_ALU | BPF_MOV | BPF_SRC(TYPE), \ |
e430f34e AS |
177 | .dst_reg = DST, \ |
178 | .src_reg = SRC, \ | |
f8f6d679 DB |
179 | .off = 0, \ |
180 | .imm = IMM }) | |
181 | ||
e430f34e | 182 | /* Direct packet access, R0 = *(uint *) (skb->data + imm32) */ |
f8f6d679 | 183 | |
e430f34e | 184 | #define BPF_LD_ABS(SIZE, IMM) \ |
2695fb55 | 185 | ((struct bpf_insn) { \ |
f8f6d679 | 186 | .code = BPF_LD | BPF_SIZE(SIZE) | BPF_ABS, \ |
e430f34e AS |
187 | .dst_reg = 0, \ |
188 | .src_reg = 0, \ | |
f8f6d679 | 189 | .off = 0, \ |
e430f34e | 190 | .imm = IMM }) |
f8f6d679 | 191 | |
e430f34e | 192 | /* Indirect packet access, R0 = *(uint *) (skb->data + src_reg + imm32) */ |
f8f6d679 | 193 | |
e430f34e | 194 | #define BPF_LD_IND(SIZE, SRC, IMM) \ |
2695fb55 | 195 | ((struct bpf_insn) { \ |
f8f6d679 | 196 | .code = BPF_LD | BPF_SIZE(SIZE) | BPF_IND, \ |
e430f34e AS |
197 | .dst_reg = 0, \ |
198 | .src_reg = SRC, \ | |
f8f6d679 | 199 | .off = 0, \ |
e430f34e | 200 | .imm = IMM }) |
f8f6d679 | 201 | |
e430f34e | 202 | /* Memory load, dst_reg = *(uint *) (src_reg + off16) */ |
f8f6d679 | 203 | |
e430f34e | 204 | #define BPF_LDX_MEM(SIZE, DST, SRC, OFF) \ |
2695fb55 | 205 | ((struct bpf_insn) { \ |
f8f6d679 | 206 | .code = BPF_LDX | BPF_SIZE(SIZE) | BPF_MEM, \ |
e430f34e AS |
207 | .dst_reg = DST, \ |
208 | .src_reg = SRC, \ | |
f8f6d679 DB |
209 | .off = OFF, \ |
210 | .imm = 0 }) | |
211 | ||
e430f34e AS |
212 | /* Memory store, *(uint *) (dst_reg + off16) = src_reg */ |
213 | ||
214 | #define BPF_STX_MEM(SIZE, DST, SRC, OFF) \ | |
2695fb55 | 215 | ((struct bpf_insn) { \ |
f8f6d679 | 216 | .code = BPF_STX | BPF_SIZE(SIZE) | BPF_MEM, \ |
e430f34e AS |
217 | .dst_reg = DST, \ |
218 | .src_reg = SRC, \ | |
f8f6d679 DB |
219 | .off = OFF, \ |
220 | .imm = 0 }) | |
221 | ||
e430f34e AS |
222 | /* Memory store, *(uint *) (dst_reg + off16) = imm32 */ |
223 | ||
224 | #define BPF_ST_MEM(SIZE, DST, OFF, IMM) \ | |
2695fb55 | 225 | ((struct bpf_insn) { \ |
e430f34e AS |
226 | .code = BPF_ST | BPF_SIZE(SIZE) | BPF_MEM, \ |
227 | .dst_reg = DST, \ | |
228 | .src_reg = 0, \ | |
229 | .off = OFF, \ | |
230 | .imm = IMM }) | |
231 | ||
232 | /* Conditional jumps against registers, if (dst_reg 'op' src_reg) goto pc + off16 */ | |
f8f6d679 | 233 | |
e430f34e | 234 | #define BPF_JMP_REG(OP, DST, SRC, OFF) \ |
2695fb55 | 235 | ((struct bpf_insn) { \ |
f8f6d679 | 236 | .code = BPF_JMP | BPF_OP(OP) | BPF_X, \ |
e430f34e AS |
237 | .dst_reg = DST, \ |
238 | .src_reg = SRC, \ | |
f8f6d679 DB |
239 | .off = OFF, \ |
240 | .imm = 0 }) | |
241 | ||
e430f34e | 242 | /* Conditional jumps against immediates, if (dst_reg 'op' imm32) goto pc + off16 */ |
f8f6d679 | 243 | |
e430f34e | 244 | #define BPF_JMP_IMM(OP, DST, IMM, OFF) \ |
2695fb55 | 245 | ((struct bpf_insn) { \ |
f8f6d679 | 246 | .code = BPF_JMP | BPF_OP(OP) | BPF_K, \ |
e430f34e AS |
247 | .dst_reg = DST, \ |
248 | .src_reg = 0, \ | |
f8f6d679 DB |
249 | .off = OFF, \ |
250 | .imm = IMM }) | |
251 | ||
252 | /* Function call */ | |
253 | ||
254 | #define BPF_EMIT_CALL(FUNC) \ | |
2695fb55 | 255 | ((struct bpf_insn) { \ |
f8f6d679 | 256 | .code = BPF_JMP | BPF_CALL, \ |
e430f34e AS |
257 | .dst_reg = 0, \ |
258 | .src_reg = 0, \ | |
f8f6d679 DB |
259 | .off = 0, \ |
260 | .imm = ((FUNC) - __bpf_call_base) }) | |
261 | ||
262 | /* Raw code statement block */ | |
263 | ||
e430f34e | 264 | #define BPF_RAW_INSN(CODE, DST, SRC, OFF, IMM) \ |
2695fb55 | 265 | ((struct bpf_insn) { \ |
f8f6d679 | 266 | .code = CODE, \ |
e430f34e AS |
267 | .dst_reg = DST, \ |
268 | .src_reg = SRC, \ | |
f8f6d679 DB |
269 | .off = OFF, \ |
270 | .imm = IMM }) | |
271 | ||
272 | /* Program exit */ | |
273 | ||
274 | #define BPF_EXIT_INSN() \ | |
2695fb55 | 275 | ((struct bpf_insn) { \ |
f8f6d679 | 276 | .code = BPF_JMP | BPF_EXIT, \ |
e430f34e AS |
277 | .dst_reg = 0, \ |
278 | .src_reg = 0, \ | |
f8f6d679 DB |
279 | .off = 0, \ |
280 | .imm = 0 }) | |
281 | ||
282 | #define bytes_to_bpf_size(bytes) \ | |
283 | ({ \ | |
284 | int bpf_size = -EINVAL; \ | |
285 | \ | |
286 | if (bytes == sizeof(u8)) \ | |
287 | bpf_size = BPF_B; \ | |
288 | else if (bytes == sizeof(u16)) \ | |
289 | bpf_size = BPF_H; \ | |
290 | else if (bytes == sizeof(u32)) \ | |
291 | bpf_size = BPF_W; \ | |
292 | else if (bytes == sizeof(u64)) \ | |
293 | bpf_size = BPF_DW; \ | |
294 | \ | |
295 | bpf_size; \ | |
296 | }) | |
9739eef1 | 297 | |
30743837 DB |
298 | /* Macro to invoke filter function. */ |
299 | #define SK_RUN_FILTER(filter, ctx) (*filter->bpf_func)(ctx, filter->insnsi) | |
bd4cf0ed | 300 | |
2695fb55 | 301 | struct bpf_insn { |
bd4cf0ed | 302 | __u8 code; /* opcode */ |
e430f34e AS |
303 | __u8 dst_reg:4; /* dest register */ |
304 | __u8 src_reg:4; /* source register */ | |
bd4cf0ed AS |
305 | __s16 off; /* signed offset */ |
306 | __s32 imm; /* signed immediate constant */ | |
307 | }; | |
308 | ||
309 | #ifdef CONFIG_COMPAT | |
310 | /* A struct sock_filter is architecture independent. */ | |
0c5fe1b4 WD |
311 | struct compat_sock_fprog { |
312 | u16 len; | |
bd4cf0ed | 313 | compat_uptr_t filter; /* struct sock_filter * */ |
0c5fe1b4 WD |
314 | }; |
315 | #endif | |
316 | ||
a3ea269b DB |
317 | struct sock_fprog_kern { |
318 | u16 len; | |
319 | struct sock_filter *filter; | |
320 | }; | |
321 | ||
792d4b5c HC |
322 | struct sk_buff; |
323 | struct sock; | |
bd4cf0ed | 324 | struct seccomp_data; |
792d4b5c | 325 | |
a3ea269b | 326 | struct sk_filter { |
b715631f | 327 | atomic_t refcnt; |
f8bbbfc3 DB |
328 | u32 jited:1, /* Is our filter JIT'ed? */ |
329 | len:31; /* Number of filter blocks */ | |
a3ea269b | 330 | struct sock_fprog_kern *orig_prog; /* Original BPF program */ |
d45ed4a4 | 331 | struct rcu_head rcu; |
0a14842f | 332 | unsigned int (*bpf_func)(const struct sk_buff *skb, |
2695fb55 | 333 | const struct bpf_insn *filter); |
d45ed4a4 | 334 | union { |
bd4cf0ed | 335 | struct sock_filter insns[0]; |
2695fb55 | 336 | struct bpf_insn insnsi[0]; |
d45ed4a4 AS |
337 | struct work_struct work; |
338 | }; | |
b715631f SH |
339 | }; |
340 | ||
d45ed4a4 | 341 | static inline unsigned int sk_filter_size(unsigned int proglen) |
b715631f | 342 | { |
d45ed4a4 AS |
343 | return max(sizeof(struct sk_filter), |
344 | offsetof(struct sk_filter, insns[proglen])); | |
b715631f SH |
345 | } |
346 | ||
a3ea269b DB |
347 | #define sk_filter_proglen(fprog) \ |
348 | (fprog->len * sizeof(fprog->filter[0])) | |
349 | ||
fbc907f0 | 350 | int sk_filter(struct sock *sk, struct sk_buff *skb); |
bd4cf0ed | 351 | |
5fe821a9 AS |
352 | void sk_filter_select_runtime(struct sk_filter *fp); |
353 | void sk_filter_free(struct sk_filter *fp); | |
bd4cf0ed AS |
354 | |
355 | int sk_convert_filter(struct sock_filter *prog, int len, | |
2695fb55 | 356 | struct bpf_insn *new_prog, int *new_len); |
a3ea269b | 357 | |
fbc907f0 | 358 | int sk_unattached_filter_create(struct sk_filter **pfp, |
b1fcd35c | 359 | struct sock_fprog_kern *fprog); |
fbc907f0 | 360 | void sk_unattached_filter_destroy(struct sk_filter *fp); |
a3ea269b | 361 | |
fbc907f0 DB |
362 | int sk_attach_filter(struct sock_fprog *fprog, struct sock *sk); |
363 | int sk_detach_filter(struct sock *sk); | |
a3ea269b | 364 | |
ec31a05c | 365 | int sk_chk_filter(const struct sock_filter *filter, unsigned int flen); |
fbc907f0 DB |
366 | int sk_get_filter(struct sock *sk, struct sock_filter __user *filter, |
367 | unsigned int len); | |
fbc907f0 | 368 | |
278571ba | 369 | bool sk_filter_charge(struct sock *sk, struct sk_filter *fp); |
fbc907f0 | 370 | void sk_filter_uncharge(struct sock *sk, struct sk_filter *fp); |
0a14842f | 371 | |
62258278 AS |
372 | u64 __bpf_call_base(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5); |
373 | void bpf_int_jit_compile(struct sk_filter *fp); | |
374 | ||
34805931 DB |
375 | #define BPF_ANC BIT(15) |
376 | ||
377 | static inline u16 bpf_anc_helper(const struct sock_filter *ftest) | |
378 | { | |
379 | BUG_ON(ftest->code & BPF_ANC); | |
380 | ||
381 | switch (ftest->code) { | |
382 | case BPF_LD | BPF_W | BPF_ABS: | |
383 | case BPF_LD | BPF_H | BPF_ABS: | |
384 | case BPF_LD | BPF_B | BPF_ABS: | |
385 | #define BPF_ANCILLARY(CODE) case SKF_AD_OFF + SKF_AD_##CODE: \ | |
386 | return BPF_ANC | SKF_AD_##CODE | |
387 | switch (ftest->k) { | |
388 | BPF_ANCILLARY(PROTOCOL); | |
389 | BPF_ANCILLARY(PKTTYPE); | |
390 | BPF_ANCILLARY(IFINDEX); | |
391 | BPF_ANCILLARY(NLATTR); | |
392 | BPF_ANCILLARY(NLATTR_NEST); | |
393 | BPF_ANCILLARY(MARK); | |
394 | BPF_ANCILLARY(QUEUE); | |
395 | BPF_ANCILLARY(HATYPE); | |
396 | BPF_ANCILLARY(RXHASH); | |
397 | BPF_ANCILLARY(CPU); | |
398 | BPF_ANCILLARY(ALU_XOR_X); | |
399 | BPF_ANCILLARY(VLAN_TAG); | |
400 | BPF_ANCILLARY(VLAN_TAG_PRESENT); | |
401 | BPF_ANCILLARY(PAY_OFFSET); | |
402 | BPF_ANCILLARY(RANDOM); | |
403 | } | |
404 | /* Fallthrough. */ | |
405 | default: | |
406 | return ftest->code; | |
407 | } | |
408 | } | |
409 | ||
9f12fbe6 ZSL |
410 | void *bpf_internal_load_pointer_neg_helper(const struct sk_buff *skb, |
411 | int k, unsigned int size); | |
412 | ||
413 | static inline void *bpf_load_pointer(const struct sk_buff *skb, int k, | |
414 | unsigned int size, void *buffer) | |
415 | { | |
416 | if (k >= 0) | |
417 | return skb_header_pointer(skb, k, size, buffer); | |
418 | ||
419 | return bpf_internal_load_pointer_neg_helper(skb, k, size); | |
420 | } | |
421 | ||
0a14842f | 422 | #ifdef CONFIG_BPF_JIT |
20074f35 | 423 | #include <stdarg.h> |
a691ce7f CG |
424 | #include <linux/linkage.h> |
425 | #include <linux/printk.h> | |
426 | ||
fbc907f0 DB |
427 | void bpf_jit_compile(struct sk_filter *fp); |
428 | void bpf_jit_free(struct sk_filter *fp); | |
79617801 DB |
429 | |
430 | static inline void bpf_jit_dump(unsigned int flen, unsigned int proglen, | |
431 | u32 pass, void *image) | |
432 | { | |
16495445 | 433 | pr_err("flen=%u proglen=%u pass=%u image=%pK\n", |
79617801 DB |
434 | flen, proglen, pass, image); |
435 | if (image) | |
16495445 | 436 | print_hex_dump(KERN_ERR, "JIT code: ", DUMP_PREFIX_OFFSET, |
79617801 DB |
437 | 16, 1, image, proglen, false); |
438 | } | |
0a14842f | 439 | #else |
d45ed4a4 | 440 | #include <linux/slab.h> |
34805931 | 441 | |
0a14842f ED |
442 | static inline void bpf_jit_compile(struct sk_filter *fp) |
443 | { | |
444 | } | |
34805931 | 445 | |
0a14842f ED |
446 | static inline void bpf_jit_free(struct sk_filter *fp) |
447 | { | |
d45ed4a4 | 448 | kfree(fp); |
0a14842f | 449 | } |
34805931 | 450 | #endif /* CONFIG_BPF_JIT */ |
0a14842f | 451 | |
ea02f941 MS |
452 | static inline int bpf_tell_extensions(void) |
453 | { | |
37692299 | 454 | return SKF_AD_MAX; |
ea02f941 MS |
455 | } |
456 | ||
1da177e4 | 457 | #endif /* __LINUX_FILTER_H__ */ |