Commit | Line | Data |
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99c55f7d AS |
1 | /* Copyright (c) 2011-2014 PLUMgrid, http://plumgrid.com |
2 | * | |
3 | * This program is free software; you can redistribute it and/or | |
4 | * modify it under the terms of version 2 of the GNU General Public | |
5 | * License as published by the Free Software Foundation. | |
6 | */ | |
7 | #ifndef _LINUX_BPF_H | |
8 | #define _LINUX_BPF_H 1 | |
9 | ||
10 | #include <uapi/linux/bpf.h> | |
74451e66 | 11 | |
99c55f7d | 12 | #include <linux/workqueue.h> |
db20fd2b | 13 | #include <linux/file.h> |
b121d1e7 | 14 | #include <linux/percpu.h> |
002245cc | 15 | #include <linux/err.h> |
74451e66 | 16 | #include <linux/rbtree_latch.h> |
d6e1e46f | 17 | #include <linux/numa.h> |
99c55f7d | 18 | |
3b1efb19 | 19 | struct perf_event; |
174a79ff | 20 | struct bpf_prog; |
99c55f7d AS |
21 | struct bpf_map; |
22 | ||
23 | /* map is generic key/value storage optionally accesible by eBPF programs */ | |
24 | struct bpf_map_ops { | |
25 | /* funcs callable from userspace (via syscall) */ | |
26 | struct bpf_map *(*map_alloc)(union bpf_attr *attr); | |
61d1b6a4 DB |
27 | void (*map_release)(struct bpf_map *map, struct file *map_file); |
28 | void (*map_free)(struct bpf_map *map); | |
db20fd2b AS |
29 | int (*map_get_next_key)(struct bpf_map *map, void *key, void *next_key); |
30 | ||
31 | /* funcs callable from userspace and from eBPF programs */ | |
32 | void *(*map_lookup_elem)(struct bpf_map *map, void *key); | |
3274f520 | 33 | int (*map_update_elem)(struct bpf_map *map, void *key, void *value, u64 flags); |
db20fd2b | 34 | int (*map_delete_elem)(struct bpf_map *map, void *key); |
2a36f0b9 WN |
35 | |
36 | /* funcs called by prog_array and perf_event_array map */ | |
d056a788 DB |
37 | void *(*map_fd_get_ptr)(struct bpf_map *map, struct file *map_file, |
38 | int fd); | |
39 | void (*map_fd_put_ptr)(void *ptr); | |
81ed18ab | 40 | u32 (*map_gen_lookup)(struct bpf_map *map, struct bpf_insn *insn_buf); |
14dc6f04 | 41 | u32 (*map_fd_sys_lookup_elem)(void *ptr); |
99c55f7d AS |
42 | }; |
43 | ||
44 | struct bpf_map { | |
45 | atomic_t refcnt; | |
46 | enum bpf_map_type map_type; | |
47 | u32 key_size; | |
48 | u32 value_size; | |
49 | u32 max_entries; | |
6c905981 | 50 | u32 map_flags; |
aaac3ba9 | 51 | u32 pages; |
f3f1c054 | 52 | u32 id; |
96eabe7a | 53 | int numa_node; |
aaac3ba9 | 54 | struct user_struct *user; |
a2c83fff | 55 | const struct bpf_map_ops *ops; |
99c55f7d | 56 | struct work_struct work; |
c9da161c | 57 | atomic_t usercnt; |
56f668df | 58 | struct bpf_map *inner_map_meta; |
067cae47 | 59 | char name[BPF_OBJ_NAME_LEN]; |
99c55f7d AS |
60 | }; |
61 | ||
17a52670 AS |
62 | /* function argument constraints */ |
63 | enum bpf_arg_type { | |
80f1d68c | 64 | ARG_DONTCARE = 0, /* unused argument in helper function */ |
17a52670 AS |
65 | |
66 | /* the following constraints used to prototype | |
67 | * bpf_map_lookup/update/delete_elem() functions | |
68 | */ | |
69 | ARG_CONST_MAP_PTR, /* const argument used as pointer to bpf_map */ | |
70 | ARG_PTR_TO_MAP_KEY, /* pointer to stack used as map key */ | |
71 | ARG_PTR_TO_MAP_VALUE, /* pointer to stack used as map value */ | |
72 | ||
73 | /* the following constraints used to prototype bpf_memcmp() and other | |
74 | * functions that access data on eBPF program stack | |
75 | */ | |
39f19ebb AS |
76 | ARG_PTR_TO_MEM, /* pointer to valid memory (stack, packet, map value) */ |
77 | ARG_PTR_TO_UNINIT_MEM, /* pointer to memory does not need to be initialized, | |
78 | * helper function must fill all bytes or clear | |
79 | * them in error case. | |
435faee1 DB |
80 | */ |
81 | ||
39f19ebb AS |
82 | ARG_CONST_SIZE, /* number of bytes accessed from memory */ |
83 | ARG_CONST_SIZE_OR_ZERO, /* number of bytes accessed from memory or 0 */ | |
80f1d68c | 84 | |
608cd71a | 85 | ARG_PTR_TO_CTX, /* pointer to context */ |
80f1d68c | 86 | ARG_ANYTHING, /* any (initialized) argument is ok */ |
17a52670 AS |
87 | }; |
88 | ||
89 | /* type of values returned from helper functions */ | |
90 | enum bpf_return_type { | |
91 | RET_INTEGER, /* function returns integer */ | |
92 | RET_VOID, /* function doesn't return anything */ | |
93 | RET_PTR_TO_MAP_VALUE_OR_NULL, /* returns a pointer to map elem value or NULL */ | |
94 | }; | |
95 | ||
09756af4 AS |
96 | /* eBPF function prototype used by verifier to allow BPF_CALLs from eBPF programs |
97 | * to in-kernel helper functions and for adjusting imm32 field in BPF_CALL | |
98 | * instructions after verifying | |
99 | */ | |
100 | struct bpf_func_proto { | |
101 | u64 (*func)(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5); | |
102 | bool gpl_only; | |
36bbef52 | 103 | bool pkt_access; |
17a52670 AS |
104 | enum bpf_return_type ret_type; |
105 | enum bpf_arg_type arg1_type; | |
106 | enum bpf_arg_type arg2_type; | |
107 | enum bpf_arg_type arg3_type; | |
108 | enum bpf_arg_type arg4_type; | |
109 | enum bpf_arg_type arg5_type; | |
110 | }; | |
111 | ||
112 | /* bpf_context is intentionally undefined structure. Pointer to bpf_context is | |
113 | * the first argument to eBPF programs. | |
114 | * For socket filters: 'struct bpf_context *' == 'struct sk_buff *' | |
115 | */ | |
116 | struct bpf_context; | |
117 | ||
118 | enum bpf_access_type { | |
119 | BPF_READ = 1, | |
120 | BPF_WRITE = 2 | |
09756af4 AS |
121 | }; |
122 | ||
19de99f7 | 123 | /* types of values stored in eBPF registers */ |
f1174f77 EC |
124 | /* Pointer types represent: |
125 | * pointer | |
126 | * pointer + imm | |
127 | * pointer + (u16) var | |
128 | * pointer + (u16) var + imm | |
129 | * if (range > 0) then [ptr, ptr + range - off) is safe to access | |
130 | * if (id > 0) means that some 'var' was added | |
131 | * if (off > 0) means that 'imm' was added | |
132 | */ | |
19de99f7 AS |
133 | enum bpf_reg_type { |
134 | NOT_INIT = 0, /* nothing was written into register */ | |
f1174f77 | 135 | SCALAR_VALUE, /* reg doesn't contain a valid pointer */ |
19de99f7 AS |
136 | PTR_TO_CTX, /* reg points to bpf_context */ |
137 | CONST_PTR_TO_MAP, /* reg points to struct bpf_map */ | |
138 | PTR_TO_MAP_VALUE, /* reg points to map element value */ | |
139 | PTR_TO_MAP_VALUE_OR_NULL,/* points to map elem value or NULL */ | |
f1174f77 | 140 | PTR_TO_STACK, /* reg == frame_pointer + offset */ |
de8f3a83 | 141 | PTR_TO_PACKET_META, /* skb->data - meta_len */ |
f1174f77 | 142 | PTR_TO_PACKET, /* reg points to skb->data */ |
19de99f7 AS |
143 | PTR_TO_PACKET_END, /* skb->data + headlen */ |
144 | }; | |
145 | ||
23994631 YS |
146 | /* The information passed from prog-specific *_is_valid_access |
147 | * back to the verifier. | |
148 | */ | |
149 | struct bpf_insn_access_aux { | |
150 | enum bpf_reg_type reg_type; | |
151 | int ctx_field_size; | |
23994631 YS |
152 | }; |
153 | ||
f96da094 DB |
154 | static inline void |
155 | bpf_ctx_record_field_size(struct bpf_insn_access_aux *aux, u32 size) | |
156 | { | |
157 | aux->ctx_field_size = size; | |
158 | } | |
159 | ||
7de16e3a JK |
160 | struct bpf_prog_ops { |
161 | int (*test_run)(struct bpf_prog *prog, const union bpf_attr *kattr, | |
162 | union bpf_attr __user *uattr); | |
163 | }; | |
164 | ||
09756af4 AS |
165 | struct bpf_verifier_ops { |
166 | /* return eBPF function prototype for verification */ | |
167 | const struct bpf_func_proto *(*get_func_proto)(enum bpf_func_id func_id); | |
17a52670 AS |
168 | |
169 | /* return true if 'size' wide access at offset 'off' within bpf_context | |
170 | * with 'type' (read or write) is allowed | |
171 | */ | |
19de99f7 | 172 | bool (*is_valid_access)(int off, int size, enum bpf_access_type type, |
23994631 | 173 | struct bpf_insn_access_aux *info); |
36bbef52 DB |
174 | int (*gen_prologue)(struct bpf_insn *insn, bool direct_write, |
175 | const struct bpf_prog *prog); | |
6b8cc1d1 DB |
176 | u32 (*convert_ctx_access)(enum bpf_access_type type, |
177 | const struct bpf_insn *src, | |
178 | struct bpf_insn *dst, | |
f96da094 | 179 | struct bpf_prog *prog, u32 *target_size); |
09756af4 AS |
180 | }; |
181 | ||
09756af4 AS |
182 | struct bpf_prog_aux { |
183 | atomic_t refcnt; | |
24701ece | 184 | u32 used_map_cnt; |
32bbe007 | 185 | u32 max_ctx_offset; |
8726679a | 186 | u32 stack_depth; |
dc4bb0e2 | 187 | u32 id; |
74451e66 DB |
188 | struct latch_tree_node ksym_tnode; |
189 | struct list_head ksym_lnode; | |
7de16e3a | 190 | const struct bpf_prog_ops *ops; |
09756af4 | 191 | struct bpf_map **used_maps; |
09756af4 | 192 | struct bpf_prog *prog; |
aaac3ba9 | 193 | struct user_struct *user; |
cb4d2b3f | 194 | u64 load_time; /* ns since boottime */ |
067cae47 | 195 | char name[BPF_OBJ_NAME_LEN]; |
abf2e7d6 AS |
196 | union { |
197 | struct work_struct work; | |
198 | struct rcu_head rcu; | |
199 | }; | |
09756af4 AS |
200 | }; |
201 | ||
04fd61ab AS |
202 | struct bpf_array { |
203 | struct bpf_map map; | |
204 | u32 elem_size; | |
205 | /* 'ownership' of prog_array is claimed by the first program that | |
206 | * is going to use this map or by the first program which FD is stored | |
207 | * in the map to make sure that all callers and callees have the same | |
208 | * prog_type and JITed flag | |
209 | */ | |
210 | enum bpf_prog_type owner_prog_type; | |
211 | bool owner_jited; | |
212 | union { | |
213 | char value[0] __aligned(8); | |
2a36f0b9 | 214 | void *ptrs[0] __aligned(8); |
a10423b8 | 215 | void __percpu *pptrs[0] __aligned(8); |
04fd61ab AS |
216 | }; |
217 | }; | |
3b1efb19 | 218 | |
04fd61ab AS |
219 | #define MAX_TAIL_CALL_CNT 32 |
220 | ||
3b1efb19 DB |
221 | struct bpf_event_entry { |
222 | struct perf_event *event; | |
223 | struct file *perf_file; | |
224 | struct file *map_file; | |
225 | struct rcu_head rcu; | |
226 | }; | |
227 | ||
04fd61ab | 228 | u64 bpf_tail_call(u64 ctx, u64 r2, u64 index, u64 r4, u64 r5); |
9940d67c | 229 | u64 bpf_get_stackid(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5); |
d056a788 | 230 | |
04fd61ab | 231 | bool bpf_prog_array_compatible(struct bpf_array *array, const struct bpf_prog *fp); |
f1f7714e | 232 | int bpf_prog_calc_tag(struct bpf_prog *fp); |
bd570ff9 | 233 | |
0756ea3e | 234 | const struct bpf_func_proto *bpf_get_trace_printk_proto(void); |
555c8a86 DB |
235 | |
236 | typedef unsigned long (*bpf_ctx_copy_t)(void *dst, const void *src, | |
aa7145c1 | 237 | unsigned long off, unsigned long len); |
555c8a86 DB |
238 | |
239 | u64 bpf_event_output(struct bpf_map *map, u64 flags, void *meta, u64 meta_size, | |
240 | void *ctx, u64 ctx_size, bpf_ctx_copy_t ctx_copy); | |
04fd61ab | 241 | |
1cf1cae9 AS |
242 | int bpf_prog_test_run_xdp(struct bpf_prog *prog, const union bpf_attr *kattr, |
243 | union bpf_attr __user *uattr); | |
244 | int bpf_prog_test_run_skb(struct bpf_prog *prog, const union bpf_attr *kattr, | |
245 | union bpf_attr __user *uattr); | |
246 | ||
324bda9e AS |
247 | /* an array of programs to be executed under rcu_lock. |
248 | * | |
249 | * Typical usage: | |
250 | * ret = BPF_PROG_RUN_ARRAY(&bpf_prog_array, ctx, BPF_PROG_RUN); | |
251 | * | |
252 | * the structure returned by bpf_prog_array_alloc() should be populated | |
253 | * with program pointers and the last pointer must be NULL. | |
254 | * The user has to keep refcnt on the program and make sure the program | |
255 | * is removed from the array before bpf_prog_put(). | |
256 | * The 'struct bpf_prog_array *' should only be replaced with xchg() | |
257 | * since other cpus are walking the array of pointers in parallel. | |
258 | */ | |
259 | struct bpf_prog_array { | |
260 | struct rcu_head rcu; | |
261 | struct bpf_prog *progs[0]; | |
262 | }; | |
263 | ||
264 | struct bpf_prog_array __rcu *bpf_prog_array_alloc(u32 prog_cnt, gfp_t flags); | |
265 | void bpf_prog_array_free(struct bpf_prog_array __rcu *progs); | |
468e2f64 AS |
266 | int bpf_prog_array_length(struct bpf_prog_array __rcu *progs); |
267 | int bpf_prog_array_copy_to_user(struct bpf_prog_array __rcu *progs, | |
268 | __u32 __user *prog_ids, u32 cnt); | |
324bda9e AS |
269 | |
270 | #define BPF_PROG_RUN_ARRAY(array, ctx, func) \ | |
271 | ({ \ | |
272 | struct bpf_prog **_prog; \ | |
273 | u32 _ret = 1; \ | |
274 | rcu_read_lock(); \ | |
275 | _prog = rcu_dereference(array)->progs; \ | |
276 | for (; *_prog; _prog++) \ | |
277 | _ret &= func(*_prog, ctx); \ | |
278 | rcu_read_unlock(); \ | |
279 | _ret; \ | |
280 | }) | |
281 | ||
89aa0758 | 282 | #ifdef CONFIG_BPF_SYSCALL |
b121d1e7 AS |
283 | DECLARE_PER_CPU(int, bpf_prog_active); |
284 | ||
7de16e3a JK |
285 | #define BPF_PROG_TYPE(_id, _name) \ |
286 | extern const struct bpf_prog_ops _name ## _prog_ops; \ | |
287 | extern const struct bpf_verifier_ops _name ## _verifier_ops; | |
40077e0c JB |
288 | #define BPF_MAP_TYPE(_id, _ops) \ |
289 | extern const struct bpf_map_ops _ops; | |
be9370a7 JB |
290 | #include <linux/bpf_types.h> |
291 | #undef BPF_PROG_TYPE | |
40077e0c | 292 | #undef BPF_MAP_TYPE |
0fc174de | 293 | |
4f9218aa JK |
294 | extern const struct bpf_verifier_ops tc_cls_act_analyzer_ops; |
295 | extern const struct bpf_verifier_ops xdp_analyzer_ops; | |
296 | ||
0fc174de | 297 | struct bpf_prog *bpf_prog_get(u32 ufd); |
113214be | 298 | struct bpf_prog *bpf_prog_get_type(u32 ufd, enum bpf_prog_type type); |
6d67942d | 299 | struct bpf_prog * __must_check bpf_prog_add(struct bpf_prog *prog, int i); |
c540594f | 300 | void bpf_prog_sub(struct bpf_prog *prog, int i); |
6d67942d | 301 | struct bpf_prog * __must_check bpf_prog_inc(struct bpf_prog *prog); |
a6f6df69 | 302 | struct bpf_prog * __must_check bpf_prog_inc_not_zero(struct bpf_prog *prog); |
61e021f3 | 303 | void bpf_prog_put(struct bpf_prog *prog); |
5ccb071e DB |
304 | int __bpf_prog_charge(struct user_struct *user, u32 pages); |
305 | void __bpf_prog_uncharge(struct user_struct *user, u32 pages); | |
61e021f3 | 306 | |
c9da161c | 307 | struct bpf_map *bpf_map_get_with_uref(u32 ufd); |
c2101297 | 308 | struct bpf_map *__bpf_map_get(struct fd f); |
6d67942d | 309 | struct bpf_map * __must_check bpf_map_inc(struct bpf_map *map, bool uref); |
c9da161c | 310 | void bpf_map_put_with_uref(struct bpf_map *map); |
61e021f3 | 311 | void bpf_map_put(struct bpf_map *map); |
6c905981 | 312 | int bpf_map_precharge_memlock(u32 pages); |
96eabe7a | 313 | void *bpf_map_area_alloc(size_t size, int numa_node); |
d407bd25 | 314 | void bpf_map_area_free(void *base); |
61e021f3 | 315 | |
1be7f75d AS |
316 | extern int sysctl_unprivileged_bpf_disabled; |
317 | ||
6e71b04a | 318 | int bpf_map_new_fd(struct bpf_map *map, int flags); |
b2197755 DB |
319 | int bpf_prog_new_fd(struct bpf_prog *prog); |
320 | ||
321 | int bpf_obj_pin_user(u32 ufd, const char __user *pathname); | |
6e71b04a | 322 | int bpf_obj_get_user(const char __user *pathname, int flags); |
b2197755 | 323 | |
15a07b33 AS |
324 | int bpf_percpu_hash_copy(struct bpf_map *map, void *key, void *value); |
325 | int bpf_percpu_array_copy(struct bpf_map *map, void *key, void *value); | |
326 | int bpf_percpu_hash_update(struct bpf_map *map, void *key, void *value, | |
327 | u64 flags); | |
328 | int bpf_percpu_array_update(struct bpf_map *map, void *key, void *value, | |
329 | u64 flags); | |
d056a788 | 330 | |
557c0c6e | 331 | int bpf_stackmap_copy(struct bpf_map *map, void *key, void *value); |
15a07b33 | 332 | |
d056a788 DB |
333 | int bpf_fd_array_map_update_elem(struct bpf_map *map, struct file *map_file, |
334 | void *key, void *value, u64 map_flags); | |
14dc6f04 | 335 | int bpf_fd_array_map_lookup_elem(struct bpf_map *map, void *key, u32 *value); |
d056a788 | 336 | void bpf_fd_array_map_clear(struct bpf_map *map); |
bcc6b1b7 MKL |
337 | int bpf_fd_htab_map_update_elem(struct bpf_map *map, struct file *map_file, |
338 | void *key, void *value, u64 map_flags); | |
14dc6f04 | 339 | int bpf_fd_htab_map_lookup_elem(struct bpf_map *map, void *key, u32 *value); |
d056a788 | 340 | |
6e71b04a CF |
341 | int bpf_get_file_flag(int flags); |
342 | ||
15a07b33 AS |
343 | /* memcpy that is used with 8-byte aligned pointers, power-of-8 size and |
344 | * forced to use 'long' read/writes to try to atomically copy long counters. | |
345 | * Best-effort only. No barriers here, since it _will_ race with concurrent | |
346 | * updates from BPF programs. Called from bpf syscall and mostly used with | |
347 | * size 8 or 16 bytes, so ask compiler to inline it. | |
348 | */ | |
349 | static inline void bpf_long_memcpy(void *dst, const void *src, u32 size) | |
350 | { | |
351 | const long *lsrc = src; | |
352 | long *ldst = dst; | |
353 | ||
354 | size /= sizeof(long); | |
355 | while (size--) | |
356 | *ldst++ = *lsrc++; | |
357 | } | |
358 | ||
61e021f3 | 359 | /* verify correctness of eBPF program */ |
9bac3d6d | 360 | int bpf_check(struct bpf_prog **fp, union bpf_attr *attr); |
46f55cff JF |
361 | |
362 | /* Map specifics */ | |
363 | struct net_device *__dev_map_lookup_elem(struct bpf_map *map, u32 key); | |
364 | void __dev_map_insert_ctx(struct bpf_map *map, u32 index); | |
365 | void __dev_map_flush(struct bpf_map *map); | |
366 | ||
9c270af3 JDB |
367 | struct bpf_cpu_map_entry *__cpu_map_lookup_elem(struct bpf_map *map, u32 key); |
368 | void __cpu_map_insert_ctx(struct bpf_map *map, u32 index); | |
369 | void __cpu_map_flush(struct bpf_map *map); | |
370 | struct xdp_buff; | |
371 | int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu, struct xdp_buff *xdp, | |
372 | struct net_device *dev_rx); | |
373 | ||
96eabe7a MKL |
374 | /* Return map's numa specified by userspace */ |
375 | static inline int bpf_map_attr_numa_node(const union bpf_attr *attr) | |
376 | { | |
377 | return (attr->map_flags & BPF_F_NUMA_NODE) ? | |
378 | attr->numa_node : NUMA_NO_NODE; | |
379 | } | |
380 | ||
9c270af3 | 381 | #else /* !CONFIG_BPF_SYSCALL */ |
0fc174de DB |
382 | static inline struct bpf_prog *bpf_prog_get(u32 ufd) |
383 | { | |
384 | return ERR_PTR(-EOPNOTSUPP); | |
385 | } | |
386 | ||
113214be DB |
387 | static inline struct bpf_prog *bpf_prog_get_type(u32 ufd, |
388 | enum bpf_prog_type type) | |
389 | { | |
390 | return ERR_PTR(-EOPNOTSUPP); | |
391 | } | |
6d67942d DB |
392 | static inline struct bpf_prog * __must_check bpf_prog_add(struct bpf_prog *prog, |
393 | int i) | |
cc2e0b3f BB |
394 | { |
395 | return ERR_PTR(-EOPNOTSUPP); | |
396 | } | |
113214be | 397 | |
c540594f DB |
398 | static inline void bpf_prog_sub(struct bpf_prog *prog, int i) |
399 | { | |
400 | } | |
401 | ||
0fc174de DB |
402 | static inline void bpf_prog_put(struct bpf_prog *prog) |
403 | { | |
404 | } | |
6d67942d DB |
405 | |
406 | static inline struct bpf_prog * __must_check bpf_prog_inc(struct bpf_prog *prog) | |
aa6a5f3c AS |
407 | { |
408 | return ERR_PTR(-EOPNOTSUPP); | |
409 | } | |
5ccb071e | 410 | |
a6f6df69 JF |
411 | static inline struct bpf_prog *__must_check |
412 | bpf_prog_inc_not_zero(struct bpf_prog *prog) | |
413 | { | |
414 | return ERR_PTR(-EOPNOTSUPP); | |
415 | } | |
416 | ||
5ccb071e DB |
417 | static inline int __bpf_prog_charge(struct user_struct *user, u32 pages) |
418 | { | |
419 | return 0; | |
420 | } | |
421 | ||
422 | static inline void __bpf_prog_uncharge(struct user_struct *user, u32 pages) | |
423 | { | |
424 | } | |
46f55cff | 425 | |
6e71b04a | 426 | static inline int bpf_obj_get_user(const char __user *pathname, int flags) |
98589a09 SL |
427 | { |
428 | return -EOPNOTSUPP; | |
429 | } | |
430 | ||
46f55cff JF |
431 | static inline struct net_device *__dev_map_lookup_elem(struct bpf_map *map, |
432 | u32 key) | |
433 | { | |
434 | return NULL; | |
435 | } | |
436 | ||
437 | static inline void __dev_map_insert_ctx(struct bpf_map *map, u32 index) | |
438 | { | |
439 | } | |
440 | ||
441 | static inline void __dev_map_flush(struct bpf_map *map) | |
442 | { | |
443 | } | |
9c270af3 JDB |
444 | |
445 | static inline | |
446 | struct bpf_cpu_map_entry *__cpu_map_lookup_elem(struct bpf_map *map, u32 key) | |
447 | { | |
448 | return NULL; | |
449 | } | |
450 | ||
451 | static inline void __cpu_map_insert_ctx(struct bpf_map *map, u32 index) | |
452 | { | |
453 | } | |
454 | ||
455 | static inline void __cpu_map_flush(struct bpf_map *map) | |
456 | { | |
457 | } | |
458 | ||
459 | struct xdp_buff; | |
460 | static inline int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu, | |
461 | struct xdp_buff *xdp, | |
462 | struct net_device *dev_rx) | |
463 | { | |
464 | return 0; | |
465 | } | |
61e021f3 | 466 | #endif /* CONFIG_BPF_SYSCALL */ |
09756af4 | 467 | |
6bdc9c4c JF |
468 | #if defined(CONFIG_STREAM_PARSER) && defined(CONFIG_BPF_SYSCALL) |
469 | struct sock *__sock_map_lookup_elem(struct bpf_map *map, u32 key); | |
5a67da2a | 470 | int sock_map_prog(struct bpf_map *map, struct bpf_prog *prog, u32 type); |
6bdc9c4c JF |
471 | #else |
472 | static inline struct sock *__sock_map_lookup_elem(struct bpf_map *map, u32 key) | |
473 | { | |
474 | return NULL; | |
475 | } | |
464bc0fd | 476 | |
5a67da2a JF |
477 | static inline int sock_map_prog(struct bpf_map *map, |
478 | struct bpf_prog *prog, | |
479 | u32 type) | |
464bc0fd JF |
480 | { |
481 | return -EOPNOTSUPP; | |
482 | } | |
6bdc9c4c JF |
483 | #endif |
484 | ||
d0003ec0 | 485 | /* verifier prototypes for helper functions called from eBPF programs */ |
a2c83fff DB |
486 | extern const struct bpf_func_proto bpf_map_lookup_elem_proto; |
487 | extern const struct bpf_func_proto bpf_map_update_elem_proto; | |
488 | extern const struct bpf_func_proto bpf_map_delete_elem_proto; | |
d0003ec0 | 489 | |
03e69b50 | 490 | extern const struct bpf_func_proto bpf_get_prandom_u32_proto; |
c04167ce | 491 | extern const struct bpf_func_proto bpf_get_smp_processor_id_proto; |
2d0e30c3 | 492 | extern const struct bpf_func_proto bpf_get_numa_node_id_proto; |
04fd61ab | 493 | extern const struct bpf_func_proto bpf_tail_call_proto; |
17ca8cbf | 494 | extern const struct bpf_func_proto bpf_ktime_get_ns_proto; |
ffeedafb AS |
495 | extern const struct bpf_func_proto bpf_get_current_pid_tgid_proto; |
496 | extern const struct bpf_func_proto bpf_get_current_uid_gid_proto; | |
497 | extern const struct bpf_func_proto bpf_get_current_comm_proto; | |
4e10df9a AS |
498 | extern const struct bpf_func_proto bpf_skb_vlan_push_proto; |
499 | extern const struct bpf_func_proto bpf_skb_vlan_pop_proto; | |
d5a3b1f6 | 500 | extern const struct bpf_func_proto bpf_get_stackid_proto; |
174a79ff | 501 | extern const struct bpf_func_proto bpf_sock_map_update_proto; |
03e69b50 | 502 | |
3ad00405 DB |
503 | /* Shared helpers among cBPF and eBPF. */ |
504 | void bpf_user_rnd_init_once(void); | |
505 | u64 bpf_user_rnd_u32(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5); | |
506 | ||
99c55f7d | 507 | #endif /* _LINUX_BPF_H */ |