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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> |
ab3f0063 | 18 | #include <linux/wait.h> |
492ecee8 | 19 | #include <linux/u64_stats_sync.h> |
99c55f7d | 20 | |
cae1927c | 21 | struct bpf_verifier_env; |
3b1efb19 | 22 | struct perf_event; |
174a79ff | 23 | struct bpf_prog; |
99c55f7d | 24 | struct bpf_map; |
4f738adb | 25 | struct sock; |
a26ca7c9 | 26 | struct seq_file; |
1b2b234b | 27 | struct btf; |
e8d2bec0 | 28 | struct btf_type; |
99c55f7d AS |
29 | |
30 | /* map is generic key/value storage optionally accesible by eBPF programs */ | |
31 | struct bpf_map_ops { | |
32 | /* funcs callable from userspace (via syscall) */ | |
1110f3a9 | 33 | int (*map_alloc_check)(union bpf_attr *attr); |
99c55f7d | 34 | struct bpf_map *(*map_alloc)(union bpf_attr *attr); |
61d1b6a4 DB |
35 | void (*map_release)(struct bpf_map *map, struct file *map_file); |
36 | void (*map_free)(struct bpf_map *map); | |
db20fd2b | 37 | int (*map_get_next_key)(struct bpf_map *map, void *key, void *next_key); |
ba6b8de4 | 38 | void (*map_release_uref)(struct bpf_map *map); |
db20fd2b AS |
39 | |
40 | /* funcs callable from userspace and from eBPF programs */ | |
41 | void *(*map_lookup_elem)(struct bpf_map *map, void *key); | |
3274f520 | 42 | int (*map_update_elem)(struct bpf_map *map, void *key, void *value, u64 flags); |
db20fd2b | 43 | int (*map_delete_elem)(struct bpf_map *map, void *key); |
f1a2e44a MV |
44 | int (*map_push_elem)(struct bpf_map *map, void *value, u64 flags); |
45 | int (*map_pop_elem)(struct bpf_map *map, void *value); | |
46 | int (*map_peek_elem)(struct bpf_map *map, void *value); | |
2a36f0b9 WN |
47 | |
48 | /* funcs called by prog_array and perf_event_array map */ | |
d056a788 DB |
49 | void *(*map_fd_get_ptr)(struct bpf_map *map, struct file *map_file, |
50 | int fd); | |
51 | void (*map_fd_put_ptr)(void *ptr); | |
81ed18ab | 52 | u32 (*map_gen_lookup)(struct bpf_map *map, struct bpf_insn *insn_buf); |
14dc6f04 | 53 | u32 (*map_fd_sys_lookup_elem)(void *ptr); |
a26ca7c9 MKL |
54 | void (*map_seq_show_elem)(struct bpf_map *map, void *key, |
55 | struct seq_file *m); | |
e8d2bec0 | 56 | int (*map_check_btf)(const struct bpf_map *map, |
1b2b234b | 57 | const struct btf *btf, |
e8d2bec0 DB |
58 | const struct btf_type *key_type, |
59 | const struct btf_type *value_type); | |
99c55f7d AS |
60 | }; |
61 | ||
62 | struct bpf_map { | |
a26ca7c9 | 63 | /* The first two cachelines with read-mostly members of which some |
be95a845 DB |
64 | * are also accessed in fast-path (e.g. ops, max_entries). |
65 | */ | |
66 | const struct bpf_map_ops *ops ____cacheline_aligned; | |
67 | struct bpf_map *inner_map_meta; | |
68 | #ifdef CONFIG_SECURITY | |
69 | void *security; | |
70 | #endif | |
99c55f7d AS |
71 | enum bpf_map_type map_type; |
72 | u32 key_size; | |
73 | u32 value_size; | |
74 | u32 max_entries; | |
6c905981 | 75 | u32 map_flags; |
d83525ca | 76 | int spin_lock_off; /* >=0 valid offset, <0 error */ |
f3f1c054 | 77 | u32 id; |
96eabe7a | 78 | int numa_node; |
9b2cf328 MKL |
79 | u32 btf_key_type_id; |
80 | u32 btf_value_type_id; | |
a26ca7c9 | 81 | struct btf *btf; |
d83525ca | 82 | u32 pages; |
b2157399 | 83 | bool unpriv_array; |
d83525ca | 84 | /* 51 bytes hole */ |
be95a845 | 85 | |
a26ca7c9 | 86 | /* The 3rd and 4th cacheline with misc members to avoid false sharing |
be95a845 DB |
87 | * particularly with refcounting. |
88 | */ | |
89 | struct user_struct *user ____cacheline_aligned; | |
90 | atomic_t refcnt; | |
c9da161c | 91 | atomic_t usercnt; |
be95a845 | 92 | struct work_struct work; |
067cae47 | 93 | char name[BPF_OBJ_NAME_LEN]; |
99c55f7d AS |
94 | }; |
95 | ||
d83525ca AS |
96 | static inline bool map_value_has_spin_lock(const struct bpf_map *map) |
97 | { | |
98 | return map->spin_lock_off >= 0; | |
99 | } | |
100 | ||
101 | static inline void check_and_init_map_lock(struct bpf_map *map, void *dst) | |
102 | { | |
103 | if (likely(!map_value_has_spin_lock(map))) | |
104 | return; | |
105 | *(struct bpf_spin_lock *)(dst + map->spin_lock_off) = | |
106 | (struct bpf_spin_lock){}; | |
107 | } | |
108 | ||
109 | /* copy everything but bpf_spin_lock */ | |
110 | static inline void copy_map_value(struct bpf_map *map, void *dst, void *src) | |
111 | { | |
112 | if (unlikely(map_value_has_spin_lock(map))) { | |
113 | u32 off = map->spin_lock_off; | |
114 | ||
115 | memcpy(dst, src, off); | |
116 | memcpy(dst + off + sizeof(struct bpf_spin_lock), | |
117 | src + off + sizeof(struct bpf_spin_lock), | |
118 | map->value_size - off - sizeof(struct bpf_spin_lock)); | |
119 | } else { | |
120 | memcpy(dst, src, map->value_size); | |
121 | } | |
122 | } | |
96049f3a AS |
123 | void copy_map_value_locked(struct bpf_map *map, void *dst, void *src, |
124 | bool lock_src); | |
d83525ca | 125 | |
602144c2 | 126 | struct bpf_offload_dev; |
a3884572 JK |
127 | struct bpf_offloaded_map; |
128 | ||
129 | struct bpf_map_dev_ops { | |
130 | int (*map_get_next_key)(struct bpf_offloaded_map *map, | |
131 | void *key, void *next_key); | |
132 | int (*map_lookup_elem)(struct bpf_offloaded_map *map, | |
133 | void *key, void *value); | |
134 | int (*map_update_elem)(struct bpf_offloaded_map *map, | |
135 | void *key, void *value, u64 flags); | |
136 | int (*map_delete_elem)(struct bpf_offloaded_map *map, void *key); | |
137 | }; | |
138 | ||
139 | struct bpf_offloaded_map { | |
140 | struct bpf_map map; | |
141 | struct net_device *netdev; | |
142 | const struct bpf_map_dev_ops *dev_ops; | |
143 | void *dev_priv; | |
144 | struct list_head offloads; | |
145 | }; | |
146 | ||
147 | static inline struct bpf_offloaded_map *map_to_offmap(struct bpf_map *map) | |
148 | { | |
149 | return container_of(map, struct bpf_offloaded_map, map); | |
150 | } | |
151 | ||
0cd3cbed JK |
152 | static inline bool bpf_map_offload_neutral(const struct bpf_map *map) |
153 | { | |
154 | return map->map_type == BPF_MAP_TYPE_PERF_EVENT_ARRAY; | |
155 | } | |
156 | ||
a26ca7c9 MKL |
157 | static inline bool bpf_map_support_seq_show(const struct bpf_map *map) |
158 | { | |
e8d2bec0 | 159 | return map->btf && map->ops->map_seq_show_elem; |
a26ca7c9 MKL |
160 | } |
161 | ||
e8d2bec0 | 162 | int map_check_no_btf(const struct bpf_map *map, |
1b2b234b | 163 | const struct btf *btf, |
e8d2bec0 DB |
164 | const struct btf_type *key_type, |
165 | const struct btf_type *value_type); | |
166 | ||
a3884572 JK |
167 | extern const struct bpf_map_ops bpf_map_offload_ops; |
168 | ||
17a52670 AS |
169 | /* function argument constraints */ |
170 | enum bpf_arg_type { | |
80f1d68c | 171 | ARG_DONTCARE = 0, /* unused argument in helper function */ |
17a52670 AS |
172 | |
173 | /* the following constraints used to prototype | |
174 | * bpf_map_lookup/update/delete_elem() functions | |
175 | */ | |
176 | ARG_CONST_MAP_PTR, /* const argument used as pointer to bpf_map */ | |
177 | ARG_PTR_TO_MAP_KEY, /* pointer to stack used as map key */ | |
178 | ARG_PTR_TO_MAP_VALUE, /* pointer to stack used as map value */ | |
2ea864c5 | 179 | ARG_PTR_TO_UNINIT_MAP_VALUE, /* pointer to valid memory used to store a map value */ |
17a52670 AS |
180 | |
181 | /* the following constraints used to prototype bpf_memcmp() and other | |
182 | * functions that access data on eBPF program stack | |
183 | */ | |
39f19ebb | 184 | ARG_PTR_TO_MEM, /* pointer to valid memory (stack, packet, map value) */ |
db1ac496 | 185 | ARG_PTR_TO_MEM_OR_NULL, /* pointer to valid memory or NULL */ |
39f19ebb AS |
186 | ARG_PTR_TO_UNINIT_MEM, /* pointer to memory does not need to be initialized, |
187 | * helper function must fill all bytes or clear | |
188 | * them in error case. | |
435faee1 DB |
189 | */ |
190 | ||
39f19ebb AS |
191 | ARG_CONST_SIZE, /* number of bytes accessed from memory */ |
192 | ARG_CONST_SIZE_OR_ZERO, /* number of bytes accessed from memory or 0 */ | |
80f1d68c | 193 | |
608cd71a | 194 | ARG_PTR_TO_CTX, /* pointer to context */ |
80f1d68c | 195 | ARG_ANYTHING, /* any (initialized) argument is ok */ |
d83525ca | 196 | ARG_PTR_TO_SPIN_LOCK, /* pointer to bpf_spin_lock */ |
46f8bc92 | 197 | ARG_PTR_TO_SOCK_COMMON, /* pointer to sock_common */ |
17a52670 AS |
198 | }; |
199 | ||
200 | /* type of values returned from helper functions */ | |
201 | enum bpf_return_type { | |
202 | RET_INTEGER, /* function returns integer */ | |
203 | RET_VOID, /* function doesn't return anything */ | |
3e6a4b3e | 204 | RET_PTR_TO_MAP_VALUE, /* returns a pointer to map elem value */ |
17a52670 | 205 | RET_PTR_TO_MAP_VALUE_OR_NULL, /* returns a pointer to map elem value or NULL */ |
c64b7983 | 206 | RET_PTR_TO_SOCKET_OR_NULL, /* returns a pointer to a socket or NULL */ |
655a51e5 | 207 | RET_PTR_TO_TCP_SOCK_OR_NULL, /* returns a pointer to a tcp_sock or NULL */ |
17a52670 AS |
208 | }; |
209 | ||
09756af4 AS |
210 | /* eBPF function prototype used by verifier to allow BPF_CALLs from eBPF programs |
211 | * to in-kernel helper functions and for adjusting imm32 field in BPF_CALL | |
212 | * instructions after verifying | |
213 | */ | |
214 | struct bpf_func_proto { | |
215 | u64 (*func)(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5); | |
216 | bool gpl_only; | |
36bbef52 | 217 | bool pkt_access; |
17a52670 AS |
218 | enum bpf_return_type ret_type; |
219 | enum bpf_arg_type arg1_type; | |
220 | enum bpf_arg_type arg2_type; | |
221 | enum bpf_arg_type arg3_type; | |
222 | enum bpf_arg_type arg4_type; | |
223 | enum bpf_arg_type arg5_type; | |
224 | }; | |
225 | ||
226 | /* bpf_context is intentionally undefined structure. Pointer to bpf_context is | |
227 | * the first argument to eBPF programs. | |
228 | * For socket filters: 'struct bpf_context *' == 'struct sk_buff *' | |
229 | */ | |
230 | struct bpf_context; | |
231 | ||
232 | enum bpf_access_type { | |
233 | BPF_READ = 1, | |
234 | BPF_WRITE = 2 | |
09756af4 AS |
235 | }; |
236 | ||
19de99f7 | 237 | /* types of values stored in eBPF registers */ |
f1174f77 EC |
238 | /* Pointer types represent: |
239 | * pointer | |
240 | * pointer + imm | |
241 | * pointer + (u16) var | |
242 | * pointer + (u16) var + imm | |
243 | * if (range > 0) then [ptr, ptr + range - off) is safe to access | |
244 | * if (id > 0) means that some 'var' was added | |
245 | * if (off > 0) means that 'imm' was added | |
246 | */ | |
19de99f7 AS |
247 | enum bpf_reg_type { |
248 | NOT_INIT = 0, /* nothing was written into register */ | |
f1174f77 | 249 | SCALAR_VALUE, /* reg doesn't contain a valid pointer */ |
19de99f7 AS |
250 | PTR_TO_CTX, /* reg points to bpf_context */ |
251 | CONST_PTR_TO_MAP, /* reg points to struct bpf_map */ | |
252 | PTR_TO_MAP_VALUE, /* reg points to map element value */ | |
253 | PTR_TO_MAP_VALUE_OR_NULL,/* points to map elem value or NULL */ | |
f1174f77 | 254 | PTR_TO_STACK, /* reg == frame_pointer + offset */ |
de8f3a83 | 255 | PTR_TO_PACKET_META, /* skb->data - meta_len */ |
f1174f77 | 256 | PTR_TO_PACKET, /* reg points to skb->data */ |
19de99f7 | 257 | PTR_TO_PACKET_END, /* skb->data + headlen */ |
d58e468b | 258 | PTR_TO_FLOW_KEYS, /* reg points to bpf_flow_keys */ |
c64b7983 JS |
259 | PTR_TO_SOCKET, /* reg points to struct bpf_sock */ |
260 | PTR_TO_SOCKET_OR_NULL, /* reg points to struct bpf_sock or NULL */ | |
46f8bc92 MKL |
261 | PTR_TO_SOCK_COMMON, /* reg points to sock_common */ |
262 | PTR_TO_SOCK_COMMON_OR_NULL, /* reg points to sock_common or NULL */ | |
655a51e5 MKL |
263 | PTR_TO_TCP_SOCK, /* reg points to struct tcp_sock */ |
264 | PTR_TO_TCP_SOCK_OR_NULL, /* reg points to struct tcp_sock or NULL */ | |
19de99f7 AS |
265 | }; |
266 | ||
23994631 YS |
267 | /* The information passed from prog-specific *_is_valid_access |
268 | * back to the verifier. | |
269 | */ | |
270 | struct bpf_insn_access_aux { | |
271 | enum bpf_reg_type reg_type; | |
272 | int ctx_field_size; | |
23994631 YS |
273 | }; |
274 | ||
f96da094 DB |
275 | static inline void |
276 | bpf_ctx_record_field_size(struct bpf_insn_access_aux *aux, u32 size) | |
277 | { | |
278 | aux->ctx_field_size = size; | |
279 | } | |
280 | ||
7de16e3a JK |
281 | struct bpf_prog_ops { |
282 | int (*test_run)(struct bpf_prog *prog, const union bpf_attr *kattr, | |
283 | union bpf_attr __user *uattr); | |
284 | }; | |
285 | ||
09756af4 AS |
286 | struct bpf_verifier_ops { |
287 | /* return eBPF function prototype for verification */ | |
5e43f899 AI |
288 | const struct bpf_func_proto * |
289 | (*get_func_proto)(enum bpf_func_id func_id, | |
290 | const struct bpf_prog *prog); | |
17a52670 AS |
291 | |
292 | /* return true if 'size' wide access at offset 'off' within bpf_context | |
293 | * with 'type' (read or write) is allowed | |
294 | */ | |
19de99f7 | 295 | bool (*is_valid_access)(int off, int size, enum bpf_access_type type, |
5e43f899 | 296 | const struct bpf_prog *prog, |
23994631 | 297 | struct bpf_insn_access_aux *info); |
36bbef52 DB |
298 | int (*gen_prologue)(struct bpf_insn *insn, bool direct_write, |
299 | const struct bpf_prog *prog); | |
e0cea7ce DB |
300 | int (*gen_ld_abs)(const struct bpf_insn *orig, |
301 | struct bpf_insn *insn_buf); | |
6b8cc1d1 DB |
302 | u32 (*convert_ctx_access)(enum bpf_access_type type, |
303 | const struct bpf_insn *src, | |
304 | struct bpf_insn *dst, | |
f96da094 | 305 | struct bpf_prog *prog, u32 *target_size); |
09756af4 AS |
306 | }; |
307 | ||
cae1927c | 308 | struct bpf_prog_offload_ops { |
08ca90af | 309 | /* verifier basic callbacks */ |
cae1927c JK |
310 | int (*insn_hook)(struct bpf_verifier_env *env, |
311 | int insn_idx, int prev_insn_idx); | |
c941ce9c | 312 | int (*finalize)(struct bpf_verifier_env *env); |
08ca90af JK |
313 | /* verifier optimization callbacks (called after .finalize) */ |
314 | int (*replace_insn)(struct bpf_verifier_env *env, u32 off, | |
315 | struct bpf_insn *insn); | |
316 | int (*remove_insns)(struct bpf_verifier_env *env, u32 off, u32 cnt); | |
317 | /* program management callbacks */ | |
16a8cb5c QM |
318 | int (*prepare)(struct bpf_prog *prog); |
319 | int (*translate)(struct bpf_prog *prog); | |
eb911947 | 320 | void (*destroy)(struct bpf_prog *prog); |
cae1927c JK |
321 | }; |
322 | ||
0a9c1991 | 323 | struct bpf_prog_offload { |
ab3f0063 JK |
324 | struct bpf_prog *prog; |
325 | struct net_device *netdev; | |
341b3e7b | 326 | struct bpf_offload_dev *offdev; |
ab3f0063 JK |
327 | void *dev_priv; |
328 | struct list_head offloads; | |
329 | bool dev_state; | |
08ca90af | 330 | bool opt_failed; |
fcfb126d JW |
331 | void *jited_image; |
332 | u32 jited_len; | |
ab3f0063 JK |
333 | }; |
334 | ||
8bad74f9 RG |
335 | enum bpf_cgroup_storage_type { |
336 | BPF_CGROUP_STORAGE_SHARED, | |
b741f163 | 337 | BPF_CGROUP_STORAGE_PERCPU, |
8bad74f9 RG |
338 | __BPF_CGROUP_STORAGE_MAX |
339 | }; | |
340 | ||
341 | #define MAX_BPF_CGROUP_STORAGE_TYPE __BPF_CGROUP_STORAGE_MAX | |
342 | ||
492ecee8 AS |
343 | struct bpf_prog_stats { |
344 | u64 cnt; | |
345 | u64 nsecs; | |
346 | struct u64_stats_sync syncp; | |
347 | }; | |
348 | ||
09756af4 AS |
349 | struct bpf_prog_aux { |
350 | atomic_t refcnt; | |
24701ece | 351 | u32 used_map_cnt; |
32bbe007 | 352 | u32 max_ctx_offset; |
e647815a | 353 | u32 max_pkt_offset; |
8726679a | 354 | u32 stack_depth; |
dc4bb0e2 | 355 | u32 id; |
ba64e7d8 YS |
356 | u32 func_cnt; /* used by non-func prog as the number of func progs */ |
357 | u32 func_idx; /* 0 for non-func prog, the index in func array for func prog */ | |
9a18eedb | 358 | bool offload_requested; |
1c2a088a AS |
359 | struct bpf_prog **func; |
360 | void *jit_data; /* JIT specific data. arch dependent */ | |
74451e66 DB |
361 | struct latch_tree_node ksym_tnode; |
362 | struct list_head ksym_lnode; | |
7de16e3a | 363 | const struct bpf_prog_ops *ops; |
09756af4 | 364 | struct bpf_map **used_maps; |
09756af4 | 365 | struct bpf_prog *prog; |
aaac3ba9 | 366 | struct user_struct *user; |
cb4d2b3f | 367 | u64 load_time; /* ns since boottime */ |
8bad74f9 | 368 | struct bpf_map *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE]; |
067cae47 | 369 | char name[BPF_OBJ_NAME_LEN]; |
afdb09c7 CF |
370 | #ifdef CONFIG_SECURITY |
371 | void *security; | |
372 | #endif | |
0a9c1991 | 373 | struct bpf_prog_offload *offload; |
838e9690 | 374 | struct btf *btf; |
ba64e7d8 | 375 | struct bpf_func_info *func_info; |
c454a46b MKL |
376 | /* bpf_line_info loaded from userspace. linfo->insn_off |
377 | * has the xlated insn offset. | |
378 | * Both the main and sub prog share the same linfo. | |
379 | * The subprog can access its first linfo by | |
380 | * using the linfo_idx. | |
381 | */ | |
382 | struct bpf_line_info *linfo; | |
383 | /* jited_linfo is the jited addr of the linfo. It has a | |
384 | * one to one mapping to linfo: | |
385 | * jited_linfo[i] is the jited addr for the linfo[i]->insn_off. | |
386 | * Both the main and sub prog share the same jited_linfo. | |
387 | * The subprog can access its first jited_linfo by | |
388 | * using the linfo_idx. | |
389 | */ | |
390 | void **jited_linfo; | |
ba64e7d8 | 391 | u32 func_info_cnt; |
c454a46b MKL |
392 | u32 nr_linfo; |
393 | /* subprog can use linfo_idx to access its first linfo and | |
394 | * jited_linfo. | |
395 | * main prog always has linfo_idx == 0 | |
396 | */ | |
397 | u32 linfo_idx; | |
492ecee8 | 398 | struct bpf_prog_stats __percpu *stats; |
abf2e7d6 AS |
399 | union { |
400 | struct work_struct work; | |
401 | struct rcu_head rcu; | |
402 | }; | |
09756af4 AS |
403 | }; |
404 | ||
04fd61ab AS |
405 | struct bpf_array { |
406 | struct bpf_map map; | |
407 | u32 elem_size; | |
b2157399 | 408 | u32 index_mask; |
04fd61ab AS |
409 | /* 'ownership' of prog_array is claimed by the first program that |
410 | * is going to use this map or by the first program which FD is stored | |
411 | * in the map to make sure that all callers and callees have the same | |
412 | * prog_type and JITed flag | |
413 | */ | |
414 | enum bpf_prog_type owner_prog_type; | |
415 | bool owner_jited; | |
416 | union { | |
417 | char value[0] __aligned(8); | |
2a36f0b9 | 418 | void *ptrs[0] __aligned(8); |
a10423b8 | 419 | void __percpu *pptrs[0] __aligned(8); |
04fd61ab AS |
420 | }; |
421 | }; | |
3b1efb19 | 422 | |
04fd61ab AS |
423 | #define MAX_TAIL_CALL_CNT 32 |
424 | ||
3b1efb19 DB |
425 | struct bpf_event_entry { |
426 | struct perf_event *event; | |
427 | struct file *perf_file; | |
428 | struct file *map_file; | |
429 | struct rcu_head rcu; | |
430 | }; | |
431 | ||
04fd61ab | 432 | bool bpf_prog_array_compatible(struct bpf_array *array, const struct bpf_prog *fp); |
f1f7714e | 433 | int bpf_prog_calc_tag(struct bpf_prog *fp); |
bd570ff9 | 434 | |
0756ea3e | 435 | const struct bpf_func_proto *bpf_get_trace_printk_proto(void); |
555c8a86 DB |
436 | |
437 | typedef unsigned long (*bpf_ctx_copy_t)(void *dst, const void *src, | |
aa7145c1 | 438 | unsigned long off, unsigned long len); |
c64b7983 JS |
439 | typedef u32 (*bpf_convert_ctx_access_t)(enum bpf_access_type type, |
440 | const struct bpf_insn *src, | |
441 | struct bpf_insn *dst, | |
442 | struct bpf_prog *prog, | |
443 | u32 *target_size); | |
555c8a86 DB |
444 | |
445 | u64 bpf_event_output(struct bpf_map *map, u64 flags, void *meta, u64 meta_size, | |
446 | void *ctx, u64 ctx_size, bpf_ctx_copy_t ctx_copy); | |
04fd61ab | 447 | |
1cf1cae9 AS |
448 | int bpf_prog_test_run_xdp(struct bpf_prog *prog, const union bpf_attr *kattr, |
449 | union bpf_attr __user *uattr); | |
450 | int bpf_prog_test_run_skb(struct bpf_prog *prog, const union bpf_attr *kattr, | |
451 | union bpf_attr __user *uattr); | |
b7a1848e SF |
452 | int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog, |
453 | const union bpf_attr *kattr, | |
454 | union bpf_attr __user *uattr); | |
1cf1cae9 | 455 | |
324bda9e AS |
456 | /* an array of programs to be executed under rcu_lock. |
457 | * | |
458 | * Typical usage: | |
459 | * ret = BPF_PROG_RUN_ARRAY(&bpf_prog_array, ctx, BPF_PROG_RUN); | |
460 | * | |
461 | * the structure returned by bpf_prog_array_alloc() should be populated | |
462 | * with program pointers and the last pointer must be NULL. | |
463 | * The user has to keep refcnt on the program and make sure the program | |
464 | * is removed from the array before bpf_prog_put(). | |
465 | * The 'struct bpf_prog_array *' should only be replaced with xchg() | |
466 | * since other cpus are walking the array of pointers in parallel. | |
467 | */ | |
394e40a2 RG |
468 | struct bpf_prog_array_item { |
469 | struct bpf_prog *prog; | |
8bad74f9 | 470 | struct bpf_cgroup_storage *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE]; |
394e40a2 RG |
471 | }; |
472 | ||
324bda9e AS |
473 | struct bpf_prog_array { |
474 | struct rcu_head rcu; | |
394e40a2 | 475 | struct bpf_prog_array_item items[0]; |
324bda9e AS |
476 | }; |
477 | ||
d29ab6e1 | 478 | struct bpf_prog_array *bpf_prog_array_alloc(u32 prog_cnt, gfp_t flags); |
324bda9e | 479 | void bpf_prog_array_free(struct bpf_prog_array __rcu *progs); |
468e2f64 AS |
480 | int bpf_prog_array_length(struct bpf_prog_array __rcu *progs); |
481 | int bpf_prog_array_copy_to_user(struct bpf_prog_array __rcu *progs, | |
482 | __u32 __user *prog_ids, u32 cnt); | |
324bda9e | 483 | |
e87c6bc3 YS |
484 | void bpf_prog_array_delete_safe(struct bpf_prog_array __rcu *progs, |
485 | struct bpf_prog *old_prog); | |
f371b304 | 486 | int bpf_prog_array_copy_info(struct bpf_prog_array __rcu *array, |
3a38bb98 YS |
487 | u32 *prog_ids, u32 request_cnt, |
488 | u32 *prog_cnt); | |
e87c6bc3 YS |
489 | int bpf_prog_array_copy(struct bpf_prog_array __rcu *old_array, |
490 | struct bpf_prog *exclude_prog, | |
491 | struct bpf_prog *include_prog, | |
492 | struct bpf_prog_array **new_array); | |
493 | ||
494 | #define __BPF_PROG_RUN_ARRAY(array, ctx, func, check_non_null) \ | |
324bda9e | 495 | ({ \ |
394e40a2 RG |
496 | struct bpf_prog_array_item *_item; \ |
497 | struct bpf_prog *_prog; \ | |
e87c6bc3 | 498 | struct bpf_prog_array *_array; \ |
324bda9e | 499 | u32 _ret = 1; \ |
6899b32b | 500 | preempt_disable(); \ |
324bda9e | 501 | rcu_read_lock(); \ |
e87c6bc3 YS |
502 | _array = rcu_dereference(array); \ |
503 | if (unlikely(check_non_null && !_array))\ | |
504 | goto _out; \ | |
394e40a2 RG |
505 | _item = &_array->items[0]; \ |
506 | while ((_prog = READ_ONCE(_item->prog))) { \ | |
507 | bpf_cgroup_storage_set(_item->cgroup_storage); \ | |
508 | _ret &= func(_prog, ctx); \ | |
509 | _item++; \ | |
e87c6bc3 YS |
510 | } \ |
511 | _out: \ | |
324bda9e | 512 | rcu_read_unlock(); \ |
6899b32b | 513 | preempt_enable_no_resched(); \ |
324bda9e AS |
514 | _ret; \ |
515 | }) | |
516 | ||
e87c6bc3 YS |
517 | #define BPF_PROG_RUN_ARRAY(array, ctx, func) \ |
518 | __BPF_PROG_RUN_ARRAY(array, ctx, func, false) | |
519 | ||
520 | #define BPF_PROG_RUN_ARRAY_CHECK(array, ctx, func) \ | |
521 | __BPF_PROG_RUN_ARRAY(array, ctx, func, true) | |
522 | ||
89aa0758 | 523 | #ifdef CONFIG_BPF_SYSCALL |
b121d1e7 AS |
524 | DECLARE_PER_CPU(int, bpf_prog_active); |
525 | ||
f66e448c CF |
526 | extern const struct file_operations bpf_map_fops; |
527 | extern const struct file_operations bpf_prog_fops; | |
528 | ||
7de16e3a JK |
529 | #define BPF_PROG_TYPE(_id, _name) \ |
530 | extern const struct bpf_prog_ops _name ## _prog_ops; \ | |
531 | extern const struct bpf_verifier_ops _name ## _verifier_ops; | |
40077e0c JB |
532 | #define BPF_MAP_TYPE(_id, _ops) \ |
533 | extern const struct bpf_map_ops _ops; | |
be9370a7 JB |
534 | #include <linux/bpf_types.h> |
535 | #undef BPF_PROG_TYPE | |
40077e0c | 536 | #undef BPF_MAP_TYPE |
0fc174de | 537 | |
ab3f0063 | 538 | extern const struct bpf_prog_ops bpf_offload_prog_ops; |
4f9218aa JK |
539 | extern const struct bpf_verifier_ops tc_cls_act_analyzer_ops; |
540 | extern const struct bpf_verifier_ops xdp_analyzer_ops; | |
541 | ||
0fc174de | 542 | struct bpf_prog *bpf_prog_get(u32 ufd); |
248f346f | 543 | struct bpf_prog *bpf_prog_get_type_dev(u32 ufd, enum bpf_prog_type type, |
288b3de5 | 544 | bool attach_drv); |
6d67942d | 545 | struct bpf_prog * __must_check bpf_prog_add(struct bpf_prog *prog, int i); |
c540594f | 546 | void bpf_prog_sub(struct bpf_prog *prog, int i); |
6d67942d | 547 | struct bpf_prog * __must_check bpf_prog_inc(struct bpf_prog *prog); |
a6f6df69 | 548 | struct bpf_prog * __must_check bpf_prog_inc_not_zero(struct bpf_prog *prog); |
61e021f3 | 549 | void bpf_prog_put(struct bpf_prog *prog); |
5ccb071e DB |
550 | int __bpf_prog_charge(struct user_struct *user, u32 pages); |
551 | void __bpf_prog_uncharge(struct user_struct *user, u32 pages); | |
61e021f3 | 552 | |
ad8ad79f | 553 | void bpf_prog_free_id(struct bpf_prog *prog, bool do_idr_lock); |
a3884572 | 554 | void bpf_map_free_id(struct bpf_map *map, bool do_idr_lock); |
ad8ad79f | 555 | |
c9da161c | 556 | struct bpf_map *bpf_map_get_with_uref(u32 ufd); |
c2101297 | 557 | struct bpf_map *__bpf_map_get(struct fd f); |
6d67942d | 558 | struct bpf_map * __must_check bpf_map_inc(struct bpf_map *map, bool uref); |
c9da161c | 559 | void bpf_map_put_with_uref(struct bpf_map *map); |
61e021f3 | 560 | void bpf_map_put(struct bpf_map *map); |
6c905981 | 561 | int bpf_map_precharge_memlock(u32 pages); |
0a4c58f5 RG |
562 | int bpf_map_charge_memlock(struct bpf_map *map, u32 pages); |
563 | void bpf_map_uncharge_memlock(struct bpf_map *map, u32 pages); | |
96eabe7a | 564 | void *bpf_map_area_alloc(size_t size, int numa_node); |
d407bd25 | 565 | void bpf_map_area_free(void *base); |
bd475643 | 566 | void bpf_map_init_from_attr(struct bpf_map *map, union bpf_attr *attr); |
61e021f3 | 567 | |
1be7f75d | 568 | extern int sysctl_unprivileged_bpf_disabled; |
492ecee8 | 569 | extern int sysctl_bpf_stats_enabled; |
1be7f75d | 570 | |
6e71b04a | 571 | int bpf_map_new_fd(struct bpf_map *map, int flags); |
b2197755 DB |
572 | int bpf_prog_new_fd(struct bpf_prog *prog); |
573 | ||
574 | int bpf_obj_pin_user(u32 ufd, const char __user *pathname); | |
6e71b04a | 575 | int bpf_obj_get_user(const char __user *pathname, int flags); |
b2197755 | 576 | |
15a07b33 AS |
577 | int bpf_percpu_hash_copy(struct bpf_map *map, void *key, void *value); |
578 | int bpf_percpu_array_copy(struct bpf_map *map, void *key, void *value); | |
579 | int bpf_percpu_hash_update(struct bpf_map *map, void *key, void *value, | |
580 | u64 flags); | |
581 | int bpf_percpu_array_update(struct bpf_map *map, void *key, void *value, | |
582 | u64 flags); | |
d056a788 | 583 | |
557c0c6e | 584 | int bpf_stackmap_copy(struct bpf_map *map, void *key, void *value); |
15a07b33 | 585 | |
d056a788 DB |
586 | int bpf_fd_array_map_update_elem(struct bpf_map *map, struct file *map_file, |
587 | void *key, void *value, u64 map_flags); | |
14dc6f04 | 588 | int bpf_fd_array_map_lookup_elem(struct bpf_map *map, void *key, u32 *value); |
bcc6b1b7 MKL |
589 | int bpf_fd_htab_map_update_elem(struct bpf_map *map, struct file *map_file, |
590 | void *key, void *value, u64 map_flags); | |
14dc6f04 | 591 | int bpf_fd_htab_map_lookup_elem(struct bpf_map *map, void *key, u32 *value); |
d056a788 | 592 | |
6e71b04a | 593 | int bpf_get_file_flag(int flags); |
dcab51f1 MKL |
594 | int bpf_check_uarg_tail_zero(void __user *uaddr, size_t expected_size, |
595 | size_t actual_size); | |
6e71b04a | 596 | |
15a07b33 AS |
597 | /* memcpy that is used with 8-byte aligned pointers, power-of-8 size and |
598 | * forced to use 'long' read/writes to try to atomically copy long counters. | |
599 | * Best-effort only. No barriers here, since it _will_ race with concurrent | |
600 | * updates from BPF programs. Called from bpf syscall and mostly used with | |
601 | * size 8 or 16 bytes, so ask compiler to inline it. | |
602 | */ | |
603 | static inline void bpf_long_memcpy(void *dst, const void *src, u32 size) | |
604 | { | |
605 | const long *lsrc = src; | |
606 | long *ldst = dst; | |
607 | ||
608 | size /= sizeof(long); | |
609 | while (size--) | |
610 | *ldst++ = *lsrc++; | |
611 | } | |
612 | ||
61e021f3 | 613 | /* verify correctness of eBPF program */ |
838e9690 YS |
614 | int bpf_check(struct bpf_prog **fp, union bpf_attr *attr, |
615 | union bpf_attr __user *uattr); | |
1ea47e01 | 616 | void bpf_patch_call_args(struct bpf_insn *insn, u32 stack_depth); |
46f55cff JF |
617 | |
618 | /* Map specifics */ | |
67f29e07 | 619 | struct xdp_buff; |
6d5fc195 | 620 | struct sk_buff; |
67f29e07 JDB |
621 | |
622 | struct bpf_dtab_netdev *__dev_map_lookup_elem(struct bpf_map *map, u32 key); | |
46f55cff JF |
623 | void __dev_map_insert_ctx(struct bpf_map *map, u32 index); |
624 | void __dev_map_flush(struct bpf_map *map); | |
38edddb8 JDB |
625 | int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp, |
626 | struct net_device *dev_rx); | |
6d5fc195 TM |
627 | int dev_map_generic_redirect(struct bpf_dtab_netdev *dst, struct sk_buff *skb, |
628 | struct bpf_prog *xdp_prog); | |
46f55cff | 629 | |
9c270af3 JDB |
630 | struct bpf_cpu_map_entry *__cpu_map_lookup_elem(struct bpf_map *map, u32 key); |
631 | void __cpu_map_insert_ctx(struct bpf_map *map, u32 index); | |
632 | void __cpu_map_flush(struct bpf_map *map); | |
9c270af3 JDB |
633 | int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu, struct xdp_buff *xdp, |
634 | struct net_device *dev_rx); | |
635 | ||
96eabe7a MKL |
636 | /* Return map's numa specified by userspace */ |
637 | static inline int bpf_map_attr_numa_node(const union bpf_attr *attr) | |
638 | { | |
639 | return (attr->map_flags & BPF_F_NUMA_NODE) ? | |
640 | attr->numa_node : NUMA_NO_NODE; | |
641 | } | |
642 | ||
040ee692 | 643 | struct bpf_prog *bpf_prog_get_type_path(const char *name, enum bpf_prog_type type); |
5dc4c4b7 | 644 | int array_map_alloc_check(union bpf_attr *attr); |
040ee692 | 645 | |
9c270af3 | 646 | #else /* !CONFIG_BPF_SYSCALL */ |
0fc174de DB |
647 | static inline struct bpf_prog *bpf_prog_get(u32 ufd) |
648 | { | |
649 | return ERR_PTR(-EOPNOTSUPP); | |
650 | } | |
651 | ||
248f346f JK |
652 | static inline struct bpf_prog *bpf_prog_get_type_dev(u32 ufd, |
653 | enum bpf_prog_type type, | |
288b3de5 | 654 | bool attach_drv) |
248f346f JK |
655 | { |
656 | return ERR_PTR(-EOPNOTSUPP); | |
657 | } | |
658 | ||
6d67942d DB |
659 | static inline struct bpf_prog * __must_check bpf_prog_add(struct bpf_prog *prog, |
660 | int i) | |
cc2e0b3f BB |
661 | { |
662 | return ERR_PTR(-EOPNOTSUPP); | |
663 | } | |
113214be | 664 | |
c540594f DB |
665 | static inline void bpf_prog_sub(struct bpf_prog *prog, int i) |
666 | { | |
667 | } | |
668 | ||
0fc174de DB |
669 | static inline void bpf_prog_put(struct bpf_prog *prog) |
670 | { | |
671 | } | |
6d67942d DB |
672 | |
673 | static inline struct bpf_prog * __must_check bpf_prog_inc(struct bpf_prog *prog) | |
aa6a5f3c AS |
674 | { |
675 | return ERR_PTR(-EOPNOTSUPP); | |
676 | } | |
5ccb071e | 677 | |
a6f6df69 JF |
678 | static inline struct bpf_prog *__must_check |
679 | bpf_prog_inc_not_zero(struct bpf_prog *prog) | |
680 | { | |
681 | return ERR_PTR(-EOPNOTSUPP); | |
682 | } | |
683 | ||
5ccb071e DB |
684 | static inline int __bpf_prog_charge(struct user_struct *user, u32 pages) |
685 | { | |
686 | return 0; | |
687 | } | |
688 | ||
689 | static inline void __bpf_prog_uncharge(struct user_struct *user, u32 pages) | |
690 | { | |
691 | } | |
46f55cff | 692 | |
6e71b04a | 693 | static inline int bpf_obj_get_user(const char __user *pathname, int flags) |
98589a09 SL |
694 | { |
695 | return -EOPNOTSUPP; | |
696 | } | |
697 | ||
46f55cff JF |
698 | static inline struct net_device *__dev_map_lookup_elem(struct bpf_map *map, |
699 | u32 key) | |
700 | { | |
701 | return NULL; | |
702 | } | |
703 | ||
704 | static inline void __dev_map_insert_ctx(struct bpf_map *map, u32 index) | |
705 | { | |
706 | } | |
707 | ||
708 | static inline void __dev_map_flush(struct bpf_map *map) | |
709 | { | |
710 | } | |
9c270af3 | 711 | |
67f29e07 JDB |
712 | struct xdp_buff; |
713 | struct bpf_dtab_netdev; | |
714 | ||
715 | static inline | |
38edddb8 JDB |
716 | int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp, |
717 | struct net_device *dev_rx) | |
67f29e07 JDB |
718 | { |
719 | return 0; | |
720 | } | |
721 | ||
6d5fc195 TM |
722 | struct sk_buff; |
723 | ||
724 | static inline int dev_map_generic_redirect(struct bpf_dtab_netdev *dst, | |
725 | struct sk_buff *skb, | |
726 | struct bpf_prog *xdp_prog) | |
727 | { | |
728 | return 0; | |
729 | } | |
730 | ||
9c270af3 JDB |
731 | static inline |
732 | struct bpf_cpu_map_entry *__cpu_map_lookup_elem(struct bpf_map *map, u32 key) | |
733 | { | |
734 | return NULL; | |
735 | } | |
736 | ||
737 | static inline void __cpu_map_insert_ctx(struct bpf_map *map, u32 index) | |
738 | { | |
739 | } | |
740 | ||
741 | static inline void __cpu_map_flush(struct bpf_map *map) | |
742 | { | |
743 | } | |
744 | ||
9c270af3 JDB |
745 | static inline int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu, |
746 | struct xdp_buff *xdp, | |
747 | struct net_device *dev_rx) | |
748 | { | |
749 | return 0; | |
750 | } | |
040ee692 AV |
751 | |
752 | static inline struct bpf_prog *bpf_prog_get_type_path(const char *name, | |
753 | enum bpf_prog_type type) | |
754 | { | |
755 | return ERR_PTR(-EOPNOTSUPP); | |
756 | } | |
61e021f3 | 757 | #endif /* CONFIG_BPF_SYSCALL */ |
09756af4 | 758 | |
479321e9 JK |
759 | static inline struct bpf_prog *bpf_prog_get_type(u32 ufd, |
760 | enum bpf_prog_type type) | |
761 | { | |
762 | return bpf_prog_get_type_dev(ufd, type, false); | |
763 | } | |
764 | ||
040ee692 AV |
765 | bool bpf_prog_get_ok(struct bpf_prog *, enum bpf_prog_type *, bool); |
766 | ||
ab3f0063 JK |
767 | int bpf_prog_offload_compile(struct bpf_prog *prog); |
768 | void bpf_prog_offload_destroy(struct bpf_prog *prog); | |
675fc275 JK |
769 | int bpf_prog_offload_info_fill(struct bpf_prog_info *info, |
770 | struct bpf_prog *prog); | |
ab3f0063 | 771 | |
52775b33 JK |
772 | int bpf_map_offload_info_fill(struct bpf_map_info *info, struct bpf_map *map); |
773 | ||
a3884572 JK |
774 | int bpf_map_offload_lookup_elem(struct bpf_map *map, void *key, void *value); |
775 | int bpf_map_offload_update_elem(struct bpf_map *map, | |
776 | void *key, void *value, u64 flags); | |
777 | int bpf_map_offload_delete_elem(struct bpf_map *map, void *key); | |
778 | int bpf_map_offload_get_next_key(struct bpf_map *map, | |
779 | void *key, void *next_key); | |
780 | ||
09728266 | 781 | bool bpf_offload_prog_map_match(struct bpf_prog *prog, struct bpf_map *map); |
a3884572 | 782 | |
1385d755 | 783 | struct bpf_offload_dev * |
dd27c2e3 | 784 | bpf_offload_dev_create(const struct bpf_prog_offload_ops *ops, void *priv); |
602144c2 | 785 | void bpf_offload_dev_destroy(struct bpf_offload_dev *offdev); |
dd27c2e3 | 786 | void *bpf_offload_dev_priv(struct bpf_offload_dev *offdev); |
602144c2 JK |
787 | int bpf_offload_dev_netdev_register(struct bpf_offload_dev *offdev, |
788 | struct net_device *netdev); | |
789 | void bpf_offload_dev_netdev_unregister(struct bpf_offload_dev *offdev, | |
790 | struct net_device *netdev); | |
fd4f227d | 791 | bool bpf_offload_dev_match(struct bpf_prog *prog, struct net_device *netdev); |
9fd7c555 | 792 | |
ab3f0063 JK |
793 | #if defined(CONFIG_NET) && defined(CONFIG_BPF_SYSCALL) |
794 | int bpf_prog_offload_init(struct bpf_prog *prog, union bpf_attr *attr); | |
795 | ||
0d830032 | 796 | static inline bool bpf_prog_is_dev_bound(const struct bpf_prog_aux *aux) |
ab3f0063 | 797 | { |
9a18eedb | 798 | return aux->offload_requested; |
ab3f0063 | 799 | } |
a3884572 JK |
800 | |
801 | static inline bool bpf_map_is_dev_bound(struct bpf_map *map) | |
802 | { | |
803 | return unlikely(map->ops == &bpf_map_offload_ops); | |
804 | } | |
805 | ||
806 | struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr); | |
807 | void bpf_map_offload_map_free(struct bpf_map *map); | |
ab3f0063 JK |
808 | #else |
809 | static inline int bpf_prog_offload_init(struct bpf_prog *prog, | |
810 | union bpf_attr *attr) | |
811 | { | |
812 | return -EOPNOTSUPP; | |
813 | } | |
814 | ||
815 | static inline bool bpf_prog_is_dev_bound(struct bpf_prog_aux *aux) | |
816 | { | |
817 | return false; | |
818 | } | |
a3884572 JK |
819 | |
820 | static inline bool bpf_map_is_dev_bound(struct bpf_map *map) | |
821 | { | |
822 | return false; | |
823 | } | |
824 | ||
825 | static inline struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr) | |
826 | { | |
827 | return ERR_PTR(-EOPNOTSUPP); | |
828 | } | |
829 | ||
830 | static inline void bpf_map_offload_map_free(struct bpf_map *map) | |
831 | { | |
832 | } | |
ab3f0063 JK |
833 | #endif /* CONFIG_NET && CONFIG_BPF_SYSCALL */ |
834 | ||
604326b4 DB |
835 | #if defined(CONFIG_BPF_STREAM_PARSER) |
836 | int sock_map_prog_update(struct bpf_map *map, struct bpf_prog *prog, u32 which); | |
837 | int sock_map_get_from_fd(const union bpf_attr *attr, struct bpf_prog *prog); | |
6bdc9c4c | 838 | #else |
604326b4 DB |
839 | static inline int sock_map_prog_update(struct bpf_map *map, |
840 | struct bpf_prog *prog, u32 which) | |
464bc0fd JF |
841 | { |
842 | return -EOPNOTSUPP; | |
843 | } | |
fdb5c453 | 844 | |
604326b4 DB |
845 | static inline int sock_map_get_from_fd(const union bpf_attr *attr, |
846 | struct bpf_prog *prog) | |
fdb5c453 SY |
847 | { |
848 | return -EINVAL; | |
849 | } | |
6bdc9c4c JF |
850 | #endif |
851 | ||
fbfc504a BT |
852 | #if defined(CONFIG_XDP_SOCKETS) |
853 | struct xdp_sock; | |
854 | struct xdp_sock *__xsk_map_lookup_elem(struct bpf_map *map, u32 key); | |
855 | int __xsk_map_redirect(struct bpf_map *map, struct xdp_buff *xdp, | |
856 | struct xdp_sock *xs); | |
857 | void __xsk_map_flush(struct bpf_map *map); | |
858 | #else | |
859 | struct xdp_sock; | |
860 | static inline struct xdp_sock *__xsk_map_lookup_elem(struct bpf_map *map, | |
861 | u32 key) | |
862 | { | |
863 | return NULL; | |
864 | } | |
865 | ||
866 | static inline int __xsk_map_redirect(struct bpf_map *map, struct xdp_buff *xdp, | |
867 | struct xdp_sock *xs) | |
868 | { | |
869 | return -EOPNOTSUPP; | |
870 | } | |
871 | ||
872 | static inline void __xsk_map_flush(struct bpf_map *map) | |
873 | { | |
874 | } | |
875 | #endif | |
876 | ||
5dc4c4b7 MKL |
877 | #if defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL) |
878 | void bpf_sk_reuseport_detach(struct sock *sk); | |
879 | int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map, void *key, | |
880 | void *value); | |
881 | int bpf_fd_reuseport_array_update_elem(struct bpf_map *map, void *key, | |
882 | void *value, u64 map_flags); | |
883 | #else | |
884 | static inline void bpf_sk_reuseport_detach(struct sock *sk) | |
885 | { | |
886 | } | |
887 | ||
888 | #ifdef CONFIG_BPF_SYSCALL | |
889 | static inline int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map, | |
890 | void *key, void *value) | |
891 | { | |
892 | return -EOPNOTSUPP; | |
893 | } | |
894 | ||
895 | static inline int bpf_fd_reuseport_array_update_elem(struct bpf_map *map, | |
896 | void *key, void *value, | |
897 | u64 map_flags) | |
898 | { | |
899 | return -EOPNOTSUPP; | |
900 | } | |
901 | #endif /* CONFIG_BPF_SYSCALL */ | |
902 | #endif /* defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL) */ | |
903 | ||
d0003ec0 | 904 | /* verifier prototypes for helper functions called from eBPF programs */ |
a2c83fff DB |
905 | extern const struct bpf_func_proto bpf_map_lookup_elem_proto; |
906 | extern const struct bpf_func_proto bpf_map_update_elem_proto; | |
907 | extern const struct bpf_func_proto bpf_map_delete_elem_proto; | |
f1a2e44a MV |
908 | extern const struct bpf_func_proto bpf_map_push_elem_proto; |
909 | extern const struct bpf_func_proto bpf_map_pop_elem_proto; | |
910 | extern const struct bpf_func_proto bpf_map_peek_elem_proto; | |
d0003ec0 | 911 | |
03e69b50 | 912 | extern const struct bpf_func_proto bpf_get_prandom_u32_proto; |
c04167ce | 913 | extern const struct bpf_func_proto bpf_get_smp_processor_id_proto; |
2d0e30c3 | 914 | extern const struct bpf_func_proto bpf_get_numa_node_id_proto; |
04fd61ab | 915 | extern const struct bpf_func_proto bpf_tail_call_proto; |
17ca8cbf | 916 | extern const struct bpf_func_proto bpf_ktime_get_ns_proto; |
ffeedafb AS |
917 | extern const struct bpf_func_proto bpf_get_current_pid_tgid_proto; |
918 | extern const struct bpf_func_proto bpf_get_current_uid_gid_proto; | |
919 | extern const struct bpf_func_proto bpf_get_current_comm_proto; | |
d5a3b1f6 | 920 | extern const struct bpf_func_proto bpf_get_stackid_proto; |
c195651e | 921 | extern const struct bpf_func_proto bpf_get_stack_proto; |
174a79ff | 922 | extern const struct bpf_func_proto bpf_sock_map_update_proto; |
81110384 | 923 | extern const struct bpf_func_proto bpf_sock_hash_update_proto; |
bf6fa2c8 | 924 | extern const struct bpf_func_proto bpf_get_current_cgroup_id_proto; |
604326b4 DB |
925 | extern const struct bpf_func_proto bpf_msg_redirect_hash_proto; |
926 | extern const struct bpf_func_proto bpf_msg_redirect_map_proto; | |
927 | extern const struct bpf_func_proto bpf_sk_redirect_hash_proto; | |
928 | extern const struct bpf_func_proto bpf_sk_redirect_map_proto; | |
d83525ca AS |
929 | extern const struct bpf_func_proto bpf_spin_lock_proto; |
930 | extern const struct bpf_func_proto bpf_spin_unlock_proto; | |
cd339431 RG |
931 | extern const struct bpf_func_proto bpf_get_local_storage_proto; |
932 | ||
3ad00405 DB |
933 | /* Shared helpers among cBPF and eBPF. */ |
934 | void bpf_user_rnd_init_once(void); | |
935 | u64 bpf_user_rnd_u32(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5); | |
936 | ||
c64b7983 | 937 | #if defined(CONFIG_NET) |
46f8bc92 MKL |
938 | bool bpf_sock_common_is_valid_access(int off, int size, |
939 | enum bpf_access_type type, | |
940 | struct bpf_insn_access_aux *info); | |
c64b7983 JS |
941 | bool bpf_sock_is_valid_access(int off, int size, enum bpf_access_type type, |
942 | struct bpf_insn_access_aux *info); | |
943 | u32 bpf_sock_convert_ctx_access(enum bpf_access_type type, | |
944 | const struct bpf_insn *si, | |
945 | struct bpf_insn *insn_buf, | |
946 | struct bpf_prog *prog, | |
947 | u32 *target_size); | |
948 | #else | |
46f8bc92 MKL |
949 | static inline bool bpf_sock_common_is_valid_access(int off, int size, |
950 | enum bpf_access_type type, | |
951 | struct bpf_insn_access_aux *info) | |
952 | { | |
953 | return false; | |
954 | } | |
c64b7983 JS |
955 | static inline bool bpf_sock_is_valid_access(int off, int size, |
956 | enum bpf_access_type type, | |
957 | struct bpf_insn_access_aux *info) | |
958 | { | |
959 | return false; | |
960 | } | |
961 | static inline u32 bpf_sock_convert_ctx_access(enum bpf_access_type type, | |
962 | const struct bpf_insn *si, | |
963 | struct bpf_insn *insn_buf, | |
964 | struct bpf_prog *prog, | |
965 | u32 *target_size) | |
966 | { | |
967 | return 0; | |
968 | } | |
969 | #endif | |
970 | ||
655a51e5 MKL |
971 | #ifdef CONFIG_INET |
972 | bool bpf_tcp_sock_is_valid_access(int off, int size, enum bpf_access_type type, | |
973 | struct bpf_insn_access_aux *info); | |
974 | ||
975 | u32 bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type, | |
976 | const struct bpf_insn *si, | |
977 | struct bpf_insn *insn_buf, | |
978 | struct bpf_prog *prog, | |
979 | u32 *target_size); | |
980 | #else | |
981 | static inline bool bpf_tcp_sock_is_valid_access(int off, int size, | |
982 | enum bpf_access_type type, | |
983 | struct bpf_insn_access_aux *info) | |
984 | { | |
985 | return false; | |
986 | } | |
987 | ||
988 | static inline u32 bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type, | |
989 | const struct bpf_insn *si, | |
990 | struct bpf_insn *insn_buf, | |
991 | struct bpf_prog *prog, | |
992 | u32 *target_size) | |
993 | { | |
994 | return 0; | |
995 | } | |
996 | #endif /* CONFIG_INET */ | |
997 | ||
99c55f7d | 998 | #endif /* _LINUX_BPF_H */ |