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> |
60a3b225 DB |
12 | #include <asm/cacheflush.h> |
13 | ||
14 | struct sk_buff; | |
15 | struct sock; | |
16 | struct seccomp_data; | |
792d4b5c | 17 | |
bd4cf0ed AS |
18 | /* Internally used and optimized filter representation with extended |
19 | * instruction set based on top of classic BPF. | |
0c5fe1b4 | 20 | */ |
bd4cf0ed AS |
21 | |
22 | /* instruction classes */ | |
23 | #define BPF_ALU64 0x07 /* alu mode in double word width */ | |
24 | ||
25 | /* ld/ldx fields */ | |
26 | #define BPF_DW 0x18 /* double word */ | |
27 | #define BPF_XADD 0xc0 /* exclusive add */ | |
28 | ||
29 | /* alu/jmp fields */ | |
30 | #define BPF_MOV 0xb0 /* mov reg to reg */ | |
31 | #define BPF_ARSH 0xc0 /* sign extending arithmetic shift right */ | |
32 | ||
33 | /* change endianness of a register */ | |
34 | #define BPF_END 0xd0 /* flags for endianness conversion: */ | |
35 | #define BPF_TO_LE 0x00 /* convert to little-endian */ | |
36 | #define BPF_TO_BE 0x08 /* convert to big-endian */ | |
37 | #define BPF_FROM_LE BPF_TO_LE | |
38 | #define BPF_FROM_BE BPF_TO_BE | |
39 | ||
40 | #define BPF_JNE 0x50 /* jump != */ | |
41 | #define BPF_JSGT 0x60 /* SGT is signed '>', GT in x86 */ | |
42 | #define BPF_JSGE 0x70 /* SGE is signed '>=', GE in x86 */ | |
43 | #define BPF_CALL 0x80 /* function call */ | |
44 | #define BPF_EXIT 0x90 /* function return */ | |
45 | ||
30743837 DB |
46 | /* Register numbers */ |
47 | enum { | |
48 | BPF_REG_0 = 0, | |
49 | BPF_REG_1, | |
50 | BPF_REG_2, | |
51 | BPF_REG_3, | |
52 | BPF_REG_4, | |
53 | BPF_REG_5, | |
54 | BPF_REG_6, | |
55 | BPF_REG_7, | |
56 | BPF_REG_8, | |
57 | BPF_REG_9, | |
58 | BPF_REG_10, | |
59 | __MAX_BPF_REG, | |
60 | }; | |
61 | ||
bd4cf0ed | 62 | /* BPF has 10 general purpose 64-bit registers and stack frame. */ |
30743837 DB |
63 | #define MAX_BPF_REG __MAX_BPF_REG |
64 | ||
65 | /* ArgX, context and stack frame pointer register positions. Note, | |
66 | * Arg1, Arg2, Arg3, etc are used as argument mappings of function | |
67 | * calls in BPF_CALL instruction. | |
68 | */ | |
69 | #define BPF_REG_ARG1 BPF_REG_1 | |
70 | #define BPF_REG_ARG2 BPF_REG_2 | |
71 | #define BPF_REG_ARG3 BPF_REG_3 | |
72 | #define BPF_REG_ARG4 BPF_REG_4 | |
73 | #define BPF_REG_ARG5 BPF_REG_5 | |
74 | #define BPF_REG_CTX BPF_REG_6 | |
75 | #define BPF_REG_FP BPF_REG_10 | |
76 | ||
77 | /* Additional register mappings for converted user programs. */ | |
78 | #define BPF_REG_A BPF_REG_0 | |
79 | #define BPF_REG_X BPF_REG_7 | |
80 | #define BPF_REG_TMP BPF_REG_8 | |
bd4cf0ed AS |
81 | |
82 | /* BPF program can access up to 512 bytes of stack space. */ | |
83 | #define MAX_BPF_STACK 512 | |
84 | ||
f8f6d679 DB |
85 | /* Helper macros for filter block array initializers. */ |
86 | ||
e430f34e | 87 | /* ALU ops on registers, bpf_add|sub|...: dst_reg += src_reg */ |
f8f6d679 | 88 | |
e430f34e | 89 | #define BPF_ALU64_REG(OP, DST, SRC) \ |
2695fb55 | 90 | ((struct bpf_insn) { \ |
f8f6d679 | 91 | .code = BPF_ALU64 | BPF_OP(OP) | BPF_X, \ |
e430f34e AS |
92 | .dst_reg = DST, \ |
93 | .src_reg = SRC, \ | |
f8f6d679 DB |
94 | .off = 0, \ |
95 | .imm = 0 }) | |
96 | ||
e430f34e | 97 | #define BPF_ALU32_REG(OP, DST, SRC) \ |
2695fb55 | 98 | ((struct bpf_insn) { \ |
f8f6d679 | 99 | .code = BPF_ALU | BPF_OP(OP) | BPF_X, \ |
e430f34e AS |
100 | .dst_reg = DST, \ |
101 | .src_reg = SRC, \ | |
f8f6d679 DB |
102 | .off = 0, \ |
103 | .imm = 0 }) | |
104 | ||
e430f34e | 105 | /* ALU ops on immediates, bpf_add|sub|...: dst_reg += imm32 */ |
f8f6d679 | 106 | |
e430f34e | 107 | #define BPF_ALU64_IMM(OP, DST, IMM) \ |
2695fb55 | 108 | ((struct bpf_insn) { \ |
f8f6d679 | 109 | .code = BPF_ALU64 | BPF_OP(OP) | BPF_K, \ |
e430f34e AS |
110 | .dst_reg = DST, \ |
111 | .src_reg = 0, \ | |
f8f6d679 DB |
112 | .off = 0, \ |
113 | .imm = IMM }) | |
114 | ||
e430f34e | 115 | #define BPF_ALU32_IMM(OP, DST, IMM) \ |
2695fb55 | 116 | ((struct bpf_insn) { \ |
f8f6d679 | 117 | .code = BPF_ALU | BPF_OP(OP) | BPF_K, \ |
e430f34e AS |
118 | .dst_reg = DST, \ |
119 | .src_reg = 0, \ | |
f8f6d679 DB |
120 | .off = 0, \ |
121 | .imm = IMM }) | |
122 | ||
123 | /* Endianess conversion, cpu_to_{l,b}e(), {l,b}e_to_cpu() */ | |
124 | ||
e430f34e | 125 | #define BPF_ENDIAN(TYPE, DST, LEN) \ |
2695fb55 | 126 | ((struct bpf_insn) { \ |
f8f6d679 | 127 | .code = BPF_ALU | BPF_END | BPF_SRC(TYPE), \ |
e430f34e AS |
128 | .dst_reg = DST, \ |
129 | .src_reg = 0, \ | |
f8f6d679 DB |
130 | .off = 0, \ |
131 | .imm = LEN }) | |
132 | ||
e430f34e | 133 | /* Short form of mov, dst_reg = src_reg */ |
f8f6d679 | 134 | |
e430f34e | 135 | #define BPF_MOV64_REG(DST, SRC) \ |
2695fb55 | 136 | ((struct bpf_insn) { \ |
f8f6d679 | 137 | .code = BPF_ALU64 | BPF_MOV | BPF_X, \ |
e430f34e AS |
138 | .dst_reg = DST, \ |
139 | .src_reg = SRC, \ | |
f8f6d679 DB |
140 | .off = 0, \ |
141 | .imm = 0 }) | |
142 | ||
e430f34e | 143 | #define BPF_MOV32_REG(DST, SRC) \ |
2695fb55 | 144 | ((struct bpf_insn) { \ |
f8f6d679 | 145 | .code = BPF_ALU | BPF_MOV | BPF_X, \ |
e430f34e AS |
146 | .dst_reg = DST, \ |
147 | .src_reg = SRC, \ | |
f8f6d679 DB |
148 | .off = 0, \ |
149 | .imm = 0 }) | |
150 | ||
e430f34e | 151 | /* Short form of mov, dst_reg = imm32 */ |
f8f6d679 | 152 | |
e430f34e | 153 | #define BPF_MOV64_IMM(DST, IMM) \ |
2695fb55 | 154 | ((struct bpf_insn) { \ |
f8f6d679 | 155 | .code = BPF_ALU64 | BPF_MOV | BPF_K, \ |
e430f34e AS |
156 | .dst_reg = DST, \ |
157 | .src_reg = 0, \ | |
f8f6d679 DB |
158 | .off = 0, \ |
159 | .imm = IMM }) | |
160 | ||
e430f34e | 161 | #define BPF_MOV32_IMM(DST, IMM) \ |
2695fb55 | 162 | ((struct bpf_insn) { \ |
f8f6d679 | 163 | .code = BPF_ALU | BPF_MOV | BPF_K, \ |
e430f34e AS |
164 | .dst_reg = DST, \ |
165 | .src_reg = 0, \ | |
f8f6d679 DB |
166 | .off = 0, \ |
167 | .imm = IMM }) | |
168 | ||
e430f34e | 169 | /* Short form of mov based on type, BPF_X: dst_reg = src_reg, BPF_K: dst_reg = imm32 */ |
f8f6d679 | 170 | |
e430f34e | 171 | #define BPF_MOV64_RAW(TYPE, DST, SRC, IMM) \ |
2695fb55 | 172 | ((struct bpf_insn) { \ |
f8f6d679 | 173 | .code = BPF_ALU64 | BPF_MOV | BPF_SRC(TYPE), \ |
e430f34e AS |
174 | .dst_reg = DST, \ |
175 | .src_reg = SRC, \ | |
f8f6d679 DB |
176 | .off = 0, \ |
177 | .imm = IMM }) | |
178 | ||
e430f34e | 179 | #define BPF_MOV32_RAW(TYPE, DST, SRC, IMM) \ |
2695fb55 | 180 | ((struct bpf_insn) { \ |
f8f6d679 | 181 | .code = BPF_ALU | BPF_MOV | BPF_SRC(TYPE), \ |
e430f34e AS |
182 | .dst_reg = DST, \ |
183 | .src_reg = SRC, \ | |
f8f6d679 DB |
184 | .off = 0, \ |
185 | .imm = IMM }) | |
186 | ||
e430f34e | 187 | /* Direct packet access, R0 = *(uint *) (skb->data + imm32) */ |
f8f6d679 | 188 | |
e430f34e | 189 | #define BPF_LD_ABS(SIZE, IMM) \ |
2695fb55 | 190 | ((struct bpf_insn) { \ |
f8f6d679 | 191 | .code = BPF_LD | BPF_SIZE(SIZE) | BPF_ABS, \ |
e430f34e AS |
192 | .dst_reg = 0, \ |
193 | .src_reg = 0, \ | |
f8f6d679 | 194 | .off = 0, \ |
e430f34e | 195 | .imm = IMM }) |
f8f6d679 | 196 | |
e430f34e | 197 | /* Indirect packet access, R0 = *(uint *) (skb->data + src_reg + imm32) */ |
f8f6d679 | 198 | |
e430f34e | 199 | #define BPF_LD_IND(SIZE, SRC, IMM) \ |
2695fb55 | 200 | ((struct bpf_insn) { \ |
f8f6d679 | 201 | .code = BPF_LD | BPF_SIZE(SIZE) | BPF_IND, \ |
e430f34e AS |
202 | .dst_reg = 0, \ |
203 | .src_reg = SRC, \ | |
f8f6d679 | 204 | .off = 0, \ |
e430f34e | 205 | .imm = IMM }) |
f8f6d679 | 206 | |
e430f34e | 207 | /* Memory load, dst_reg = *(uint *) (src_reg + off16) */ |
f8f6d679 | 208 | |
e430f34e | 209 | #define BPF_LDX_MEM(SIZE, DST, SRC, OFF) \ |
2695fb55 | 210 | ((struct bpf_insn) { \ |
f8f6d679 | 211 | .code = BPF_LDX | BPF_SIZE(SIZE) | BPF_MEM, \ |
e430f34e AS |
212 | .dst_reg = DST, \ |
213 | .src_reg = SRC, \ | |
f8f6d679 DB |
214 | .off = OFF, \ |
215 | .imm = 0 }) | |
216 | ||
e430f34e AS |
217 | /* Memory store, *(uint *) (dst_reg + off16) = src_reg */ |
218 | ||
219 | #define BPF_STX_MEM(SIZE, DST, SRC, OFF) \ | |
2695fb55 | 220 | ((struct bpf_insn) { \ |
f8f6d679 | 221 | .code = BPF_STX | BPF_SIZE(SIZE) | BPF_MEM, \ |
e430f34e AS |
222 | .dst_reg = DST, \ |
223 | .src_reg = SRC, \ | |
f8f6d679 DB |
224 | .off = OFF, \ |
225 | .imm = 0 }) | |
226 | ||
e430f34e AS |
227 | /* Memory store, *(uint *) (dst_reg + off16) = imm32 */ |
228 | ||
229 | #define BPF_ST_MEM(SIZE, DST, OFF, IMM) \ | |
2695fb55 | 230 | ((struct bpf_insn) { \ |
e430f34e AS |
231 | .code = BPF_ST | BPF_SIZE(SIZE) | BPF_MEM, \ |
232 | .dst_reg = DST, \ | |
233 | .src_reg = 0, \ | |
234 | .off = OFF, \ | |
235 | .imm = IMM }) | |
236 | ||
237 | /* Conditional jumps against registers, if (dst_reg 'op' src_reg) goto pc + off16 */ | |
f8f6d679 | 238 | |
e430f34e | 239 | #define BPF_JMP_REG(OP, DST, SRC, OFF) \ |
2695fb55 | 240 | ((struct bpf_insn) { \ |
f8f6d679 | 241 | .code = BPF_JMP | BPF_OP(OP) | BPF_X, \ |
e430f34e AS |
242 | .dst_reg = DST, \ |
243 | .src_reg = SRC, \ | |
f8f6d679 DB |
244 | .off = OFF, \ |
245 | .imm = 0 }) | |
246 | ||
e430f34e | 247 | /* Conditional jumps against immediates, if (dst_reg 'op' imm32) goto pc + off16 */ |
f8f6d679 | 248 | |
e430f34e | 249 | #define BPF_JMP_IMM(OP, DST, IMM, OFF) \ |
2695fb55 | 250 | ((struct bpf_insn) { \ |
f8f6d679 | 251 | .code = BPF_JMP | BPF_OP(OP) | BPF_K, \ |
e430f34e AS |
252 | .dst_reg = DST, \ |
253 | .src_reg = 0, \ | |
f8f6d679 DB |
254 | .off = OFF, \ |
255 | .imm = IMM }) | |
256 | ||
257 | /* Function call */ | |
258 | ||
259 | #define BPF_EMIT_CALL(FUNC) \ | |
2695fb55 | 260 | ((struct bpf_insn) { \ |
f8f6d679 | 261 | .code = BPF_JMP | BPF_CALL, \ |
e430f34e AS |
262 | .dst_reg = 0, \ |
263 | .src_reg = 0, \ | |
f8f6d679 DB |
264 | .off = 0, \ |
265 | .imm = ((FUNC) - __bpf_call_base) }) | |
266 | ||
267 | /* Raw code statement block */ | |
268 | ||
e430f34e | 269 | #define BPF_RAW_INSN(CODE, DST, SRC, OFF, IMM) \ |
2695fb55 | 270 | ((struct bpf_insn) { \ |
f8f6d679 | 271 | .code = CODE, \ |
e430f34e AS |
272 | .dst_reg = DST, \ |
273 | .src_reg = SRC, \ | |
f8f6d679 DB |
274 | .off = OFF, \ |
275 | .imm = IMM }) | |
276 | ||
277 | /* Program exit */ | |
278 | ||
279 | #define BPF_EXIT_INSN() \ | |
2695fb55 | 280 | ((struct bpf_insn) { \ |
f8f6d679 | 281 | .code = BPF_JMP | BPF_EXIT, \ |
e430f34e AS |
282 | .dst_reg = 0, \ |
283 | .src_reg = 0, \ | |
f8f6d679 DB |
284 | .off = 0, \ |
285 | .imm = 0 }) | |
286 | ||
287 | #define bytes_to_bpf_size(bytes) \ | |
288 | ({ \ | |
289 | int bpf_size = -EINVAL; \ | |
290 | \ | |
291 | if (bytes == sizeof(u8)) \ | |
292 | bpf_size = BPF_B; \ | |
293 | else if (bytes == sizeof(u16)) \ | |
294 | bpf_size = BPF_H; \ | |
295 | else if (bytes == sizeof(u32)) \ | |
296 | bpf_size = BPF_W; \ | |
297 | else if (bytes == sizeof(u64)) \ | |
298 | bpf_size = BPF_DW; \ | |
299 | \ | |
300 | bpf_size; \ | |
301 | }) | |
9739eef1 | 302 | |
30743837 | 303 | /* Macro to invoke filter function. */ |
7ae457c1 AS |
304 | #define SK_RUN_FILTER(filter, ctx) \ |
305 | (*filter->prog->bpf_func)(ctx, filter->prog->insnsi) | |
bd4cf0ed | 306 | |
2695fb55 | 307 | struct bpf_insn { |
bd4cf0ed | 308 | __u8 code; /* opcode */ |
e430f34e AS |
309 | __u8 dst_reg:4; /* dest register */ |
310 | __u8 src_reg:4; /* source register */ | |
bd4cf0ed AS |
311 | __s16 off; /* signed offset */ |
312 | __s32 imm; /* signed immediate constant */ | |
313 | }; | |
314 | ||
315 | #ifdef CONFIG_COMPAT | |
316 | /* A struct sock_filter is architecture independent. */ | |
0c5fe1b4 WD |
317 | struct compat_sock_fprog { |
318 | u16 len; | |
bd4cf0ed | 319 | compat_uptr_t filter; /* struct sock_filter * */ |
0c5fe1b4 WD |
320 | }; |
321 | #endif | |
322 | ||
a3ea269b DB |
323 | struct sock_fprog_kern { |
324 | u16 len; | |
325 | struct sock_filter *filter; | |
326 | }; | |
327 | ||
60a3b225 DB |
328 | struct bpf_work_struct { |
329 | struct bpf_prog *prog; | |
330 | struct work_struct work; | |
331 | }; | |
792d4b5c | 332 | |
7ae457c1 | 333 | struct bpf_prog { |
60a3b225 | 334 | u32 pages; /* Number of allocated pages */ |
f8bbbfc3 DB |
335 | u32 jited:1, /* Is our filter JIT'ed? */ |
336 | len:31; /* Number of filter blocks */ | |
a3ea269b | 337 | struct sock_fprog_kern *orig_prog; /* Original BPF program */ |
60a3b225 | 338 | struct bpf_work_struct *work; /* Deferred free work struct */ |
0a14842f | 339 | unsigned int (*bpf_func)(const struct sk_buff *skb, |
2695fb55 | 340 | const struct bpf_insn *filter); |
60a3b225 | 341 | /* Instructions for interpreter */ |
d45ed4a4 | 342 | union { |
bd4cf0ed | 343 | struct sock_filter insns[0]; |
2695fb55 | 344 | struct bpf_insn insnsi[0]; |
d45ed4a4 | 345 | }; |
b715631f SH |
346 | }; |
347 | ||
7ae457c1 AS |
348 | struct sk_filter { |
349 | atomic_t refcnt; | |
350 | struct rcu_head rcu; | |
351 | struct bpf_prog *prog; | |
352 | }; | |
353 | ||
354 | #define BPF_PROG_RUN(filter, ctx) (*filter->bpf_func)(ctx, filter->insnsi) | |
355 | ||
356 | static inline unsigned int bpf_prog_size(unsigned int proglen) | |
b715631f | 357 | { |
7ae457c1 AS |
358 | return max(sizeof(struct bpf_prog), |
359 | offsetof(struct bpf_prog, insns[proglen])); | |
b715631f SH |
360 | } |
361 | ||
009937e7 | 362 | #define bpf_classic_proglen(fprog) (fprog->len * sizeof(fprog->filter[0])) |
a3ea269b | 363 | |
60a3b225 DB |
364 | #ifdef CONFIG_DEBUG_SET_MODULE_RONX |
365 | static inline void bpf_prog_lock_ro(struct bpf_prog *fp) | |
366 | { | |
367 | set_memory_ro((unsigned long)fp, fp->pages); | |
368 | } | |
369 | ||
370 | static inline void bpf_prog_unlock_ro(struct bpf_prog *fp) | |
371 | { | |
372 | set_memory_rw((unsigned long)fp, fp->pages); | |
373 | } | |
374 | #else | |
375 | static inline void bpf_prog_lock_ro(struct bpf_prog *fp) | |
376 | { | |
377 | } | |
378 | ||
379 | static inline void bpf_prog_unlock_ro(struct bpf_prog *fp) | |
380 | { | |
381 | } | |
382 | #endif /* CONFIG_DEBUG_SET_MODULE_RONX */ | |
383 | ||
fbc907f0 | 384 | int sk_filter(struct sock *sk, struct sk_buff *skb); |
bd4cf0ed | 385 | |
7ae457c1 AS |
386 | void bpf_prog_select_runtime(struct bpf_prog *fp); |
387 | void bpf_prog_free(struct bpf_prog *fp); | |
bd4cf0ed | 388 | |
8fb575ca AS |
389 | int bpf_convert_filter(struct sock_filter *prog, int len, |
390 | struct bpf_insn *new_prog, int *new_len); | |
a3ea269b | 391 | |
60a3b225 DB |
392 | struct bpf_prog *bpf_prog_alloc(unsigned int size, gfp_t gfp_extra_flags); |
393 | struct bpf_prog *bpf_prog_realloc(struct bpf_prog *fp_old, unsigned int size, | |
394 | gfp_t gfp_extra_flags); | |
395 | void __bpf_prog_free(struct bpf_prog *fp); | |
396 | ||
397 | static inline void bpf_prog_unlock_free(struct bpf_prog *fp) | |
398 | { | |
399 | bpf_prog_unlock_ro(fp); | |
400 | __bpf_prog_free(fp); | |
401 | } | |
402 | ||
7ae457c1 AS |
403 | int bpf_prog_create(struct bpf_prog **pfp, struct sock_fprog_kern *fprog); |
404 | void bpf_prog_destroy(struct bpf_prog *fp); | |
a3ea269b | 405 | |
fbc907f0 DB |
406 | int sk_attach_filter(struct sock_fprog *fprog, struct sock *sk); |
407 | int sk_detach_filter(struct sock *sk); | |
a3ea269b | 408 | |
4df95ff4 | 409 | int bpf_check_classic(const struct sock_filter *filter, unsigned int flen); |
fbc907f0 DB |
410 | int sk_get_filter(struct sock *sk, struct sock_filter __user *filter, |
411 | unsigned int len); | |
fbc907f0 | 412 | |
278571ba | 413 | bool sk_filter_charge(struct sock *sk, struct sk_filter *fp); |
fbc907f0 | 414 | void sk_filter_uncharge(struct sock *sk, struct sk_filter *fp); |
0a14842f | 415 | |
62258278 | 416 | u64 __bpf_call_base(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5); |
7ae457c1 | 417 | void bpf_int_jit_compile(struct bpf_prog *fp); |
62258278 | 418 | |
34805931 DB |
419 | #define BPF_ANC BIT(15) |
420 | ||
421 | static inline u16 bpf_anc_helper(const struct sock_filter *ftest) | |
422 | { | |
423 | BUG_ON(ftest->code & BPF_ANC); | |
424 | ||
425 | switch (ftest->code) { | |
426 | case BPF_LD | BPF_W | BPF_ABS: | |
427 | case BPF_LD | BPF_H | BPF_ABS: | |
428 | case BPF_LD | BPF_B | BPF_ABS: | |
429 | #define BPF_ANCILLARY(CODE) case SKF_AD_OFF + SKF_AD_##CODE: \ | |
430 | return BPF_ANC | SKF_AD_##CODE | |
431 | switch (ftest->k) { | |
432 | BPF_ANCILLARY(PROTOCOL); | |
433 | BPF_ANCILLARY(PKTTYPE); | |
434 | BPF_ANCILLARY(IFINDEX); | |
435 | BPF_ANCILLARY(NLATTR); | |
436 | BPF_ANCILLARY(NLATTR_NEST); | |
437 | BPF_ANCILLARY(MARK); | |
438 | BPF_ANCILLARY(QUEUE); | |
439 | BPF_ANCILLARY(HATYPE); | |
440 | BPF_ANCILLARY(RXHASH); | |
441 | BPF_ANCILLARY(CPU); | |
442 | BPF_ANCILLARY(ALU_XOR_X); | |
443 | BPF_ANCILLARY(VLAN_TAG); | |
444 | BPF_ANCILLARY(VLAN_TAG_PRESENT); | |
445 | BPF_ANCILLARY(PAY_OFFSET); | |
446 | BPF_ANCILLARY(RANDOM); | |
447 | } | |
448 | /* Fallthrough. */ | |
449 | default: | |
450 | return ftest->code; | |
451 | } | |
452 | } | |
453 | ||
9f12fbe6 ZSL |
454 | void *bpf_internal_load_pointer_neg_helper(const struct sk_buff *skb, |
455 | int k, unsigned int size); | |
456 | ||
457 | static inline void *bpf_load_pointer(const struct sk_buff *skb, int k, | |
458 | unsigned int size, void *buffer) | |
459 | { | |
460 | if (k >= 0) | |
461 | return skb_header_pointer(skb, k, size, buffer); | |
462 | ||
463 | return bpf_internal_load_pointer_neg_helper(skb, k, size); | |
464 | } | |
465 | ||
0a14842f | 466 | #ifdef CONFIG_BPF_JIT |
20074f35 | 467 | #include <stdarg.h> |
a691ce7f CG |
468 | #include <linux/linkage.h> |
469 | #include <linux/printk.h> | |
470 | ||
7ae457c1 AS |
471 | void bpf_jit_compile(struct bpf_prog *fp); |
472 | void bpf_jit_free(struct bpf_prog *fp); | |
79617801 DB |
473 | |
474 | static inline void bpf_jit_dump(unsigned int flen, unsigned int proglen, | |
475 | u32 pass, void *image) | |
476 | { | |
16495445 | 477 | pr_err("flen=%u proglen=%u pass=%u image=%pK\n", |
79617801 DB |
478 | flen, proglen, pass, image); |
479 | if (image) | |
16495445 | 480 | print_hex_dump(KERN_ERR, "JIT code: ", DUMP_PREFIX_OFFSET, |
79617801 DB |
481 | 16, 1, image, proglen, false); |
482 | } | |
0a14842f | 483 | #else |
d45ed4a4 | 484 | #include <linux/slab.h> |
34805931 | 485 | |
7ae457c1 | 486 | static inline void bpf_jit_compile(struct bpf_prog *fp) |
0a14842f ED |
487 | { |
488 | } | |
34805931 | 489 | |
7ae457c1 | 490 | static inline void bpf_jit_free(struct bpf_prog *fp) |
0a14842f | 491 | { |
60a3b225 | 492 | bpf_prog_unlock_free(fp); |
0a14842f | 493 | } |
34805931 | 494 | #endif /* CONFIG_BPF_JIT */ |
0a14842f | 495 | |
ea02f941 MS |
496 | static inline int bpf_tell_extensions(void) |
497 | { | |
37692299 | 498 | return SKF_AD_MAX; |
ea02f941 MS |
499 | } |
500 | ||
1da177e4 | 501 | #endif /* __LINUX_FILTER_H__ */ |