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> |
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); | |
d8eca5bb DB |
60 | |
61 | /* Direct value access helpers. */ | |
62 | int (*map_direct_value_addr)(const struct bpf_map *map, | |
63 | u64 *imm, u32 off); | |
64 | int (*map_direct_value_meta)(const struct bpf_map *map, | |
65 | u64 imm, u32 *off); | |
99c55f7d AS |
66 | }; |
67 | ||
68 | struct bpf_map { | |
a26ca7c9 | 69 | /* The first two cachelines with read-mostly members of which some |
be95a845 DB |
70 | * are also accessed in fast-path (e.g. ops, max_entries). |
71 | */ | |
72 | const struct bpf_map_ops *ops ____cacheline_aligned; | |
73 | struct bpf_map *inner_map_meta; | |
74 | #ifdef CONFIG_SECURITY | |
75 | void *security; | |
76 | #endif | |
99c55f7d AS |
77 | enum bpf_map_type map_type; |
78 | u32 key_size; | |
79 | u32 value_size; | |
80 | u32 max_entries; | |
6c905981 | 81 | u32 map_flags; |
d83525ca | 82 | int spin_lock_off; /* >=0 valid offset, <0 error */ |
f3f1c054 | 83 | u32 id; |
96eabe7a | 84 | int numa_node; |
9b2cf328 MKL |
85 | u32 btf_key_type_id; |
86 | u32 btf_value_type_id; | |
a26ca7c9 | 87 | struct btf *btf; |
d83525ca | 88 | u32 pages; |
b2157399 | 89 | bool unpriv_array; |
87df15de DB |
90 | bool frozen; /* write-once */ |
91 | /* 48 bytes hole */ | |
be95a845 | 92 | |
a26ca7c9 | 93 | /* The 3rd and 4th cacheline with misc members to avoid false sharing |
be95a845 DB |
94 | * particularly with refcounting. |
95 | */ | |
96 | struct user_struct *user ____cacheline_aligned; | |
97 | atomic_t refcnt; | |
c9da161c | 98 | atomic_t usercnt; |
be95a845 | 99 | struct work_struct work; |
067cae47 | 100 | char name[BPF_OBJ_NAME_LEN]; |
99c55f7d AS |
101 | }; |
102 | ||
d83525ca AS |
103 | static inline bool map_value_has_spin_lock(const struct bpf_map *map) |
104 | { | |
105 | return map->spin_lock_off >= 0; | |
106 | } | |
107 | ||
108 | static inline void check_and_init_map_lock(struct bpf_map *map, void *dst) | |
109 | { | |
110 | if (likely(!map_value_has_spin_lock(map))) | |
111 | return; | |
112 | *(struct bpf_spin_lock *)(dst + map->spin_lock_off) = | |
113 | (struct bpf_spin_lock){}; | |
114 | } | |
115 | ||
116 | /* copy everything but bpf_spin_lock */ | |
117 | static inline void copy_map_value(struct bpf_map *map, void *dst, void *src) | |
118 | { | |
119 | if (unlikely(map_value_has_spin_lock(map))) { | |
120 | u32 off = map->spin_lock_off; | |
121 | ||
122 | memcpy(dst, src, off); | |
123 | memcpy(dst + off + sizeof(struct bpf_spin_lock), | |
124 | src + off + sizeof(struct bpf_spin_lock), | |
125 | map->value_size - off - sizeof(struct bpf_spin_lock)); | |
126 | } else { | |
127 | memcpy(dst, src, map->value_size); | |
128 | } | |
129 | } | |
96049f3a AS |
130 | void copy_map_value_locked(struct bpf_map *map, void *dst, void *src, |
131 | bool lock_src); | |
d83525ca | 132 | |
602144c2 | 133 | struct bpf_offload_dev; |
a3884572 JK |
134 | struct bpf_offloaded_map; |
135 | ||
136 | struct bpf_map_dev_ops { | |
137 | int (*map_get_next_key)(struct bpf_offloaded_map *map, | |
138 | void *key, void *next_key); | |
139 | int (*map_lookup_elem)(struct bpf_offloaded_map *map, | |
140 | void *key, void *value); | |
141 | int (*map_update_elem)(struct bpf_offloaded_map *map, | |
142 | void *key, void *value, u64 flags); | |
143 | int (*map_delete_elem)(struct bpf_offloaded_map *map, void *key); | |
144 | }; | |
145 | ||
146 | struct bpf_offloaded_map { | |
147 | struct bpf_map map; | |
148 | struct net_device *netdev; | |
149 | const struct bpf_map_dev_ops *dev_ops; | |
150 | void *dev_priv; | |
151 | struct list_head offloads; | |
152 | }; | |
153 | ||
154 | static inline struct bpf_offloaded_map *map_to_offmap(struct bpf_map *map) | |
155 | { | |
156 | return container_of(map, struct bpf_offloaded_map, map); | |
157 | } | |
158 | ||
0cd3cbed JK |
159 | static inline bool bpf_map_offload_neutral(const struct bpf_map *map) |
160 | { | |
161 | return map->map_type == BPF_MAP_TYPE_PERF_EVENT_ARRAY; | |
162 | } | |
163 | ||
a26ca7c9 MKL |
164 | static inline bool bpf_map_support_seq_show(const struct bpf_map *map) |
165 | { | |
e8d2bec0 | 166 | return map->btf && map->ops->map_seq_show_elem; |
a26ca7c9 MKL |
167 | } |
168 | ||
e8d2bec0 | 169 | int map_check_no_btf(const struct bpf_map *map, |
1b2b234b | 170 | const struct btf *btf, |
e8d2bec0 DB |
171 | const struct btf_type *key_type, |
172 | const struct btf_type *value_type); | |
173 | ||
a3884572 JK |
174 | extern const struct bpf_map_ops bpf_map_offload_ops; |
175 | ||
17a52670 AS |
176 | /* function argument constraints */ |
177 | enum bpf_arg_type { | |
80f1d68c | 178 | ARG_DONTCARE = 0, /* unused argument in helper function */ |
17a52670 AS |
179 | |
180 | /* the following constraints used to prototype | |
181 | * bpf_map_lookup/update/delete_elem() functions | |
182 | */ | |
183 | ARG_CONST_MAP_PTR, /* const argument used as pointer to bpf_map */ | |
184 | ARG_PTR_TO_MAP_KEY, /* pointer to stack used as map key */ | |
185 | ARG_PTR_TO_MAP_VALUE, /* pointer to stack used as map value */ | |
2ea864c5 | 186 | ARG_PTR_TO_UNINIT_MAP_VALUE, /* pointer to valid memory used to store a map value */ |
17a52670 AS |
187 | |
188 | /* the following constraints used to prototype bpf_memcmp() and other | |
189 | * functions that access data on eBPF program stack | |
190 | */ | |
39f19ebb | 191 | ARG_PTR_TO_MEM, /* pointer to valid memory (stack, packet, map value) */ |
db1ac496 | 192 | ARG_PTR_TO_MEM_OR_NULL, /* pointer to valid memory or NULL */ |
39f19ebb AS |
193 | ARG_PTR_TO_UNINIT_MEM, /* pointer to memory does not need to be initialized, |
194 | * helper function must fill all bytes or clear | |
195 | * them in error case. | |
435faee1 DB |
196 | */ |
197 | ||
39f19ebb AS |
198 | ARG_CONST_SIZE, /* number of bytes accessed from memory */ |
199 | ARG_CONST_SIZE_OR_ZERO, /* number of bytes accessed from memory or 0 */ | |
80f1d68c | 200 | |
608cd71a | 201 | ARG_PTR_TO_CTX, /* pointer to context */ |
80f1d68c | 202 | ARG_ANYTHING, /* any (initialized) argument is ok */ |
d83525ca | 203 | ARG_PTR_TO_SPIN_LOCK, /* pointer to bpf_spin_lock */ |
46f8bc92 | 204 | ARG_PTR_TO_SOCK_COMMON, /* pointer to sock_common */ |
57c3bb72 AI |
205 | ARG_PTR_TO_INT, /* pointer to int */ |
206 | ARG_PTR_TO_LONG, /* pointer to long */ | |
17a52670 AS |
207 | }; |
208 | ||
209 | /* type of values returned from helper functions */ | |
210 | enum bpf_return_type { | |
211 | RET_INTEGER, /* function returns integer */ | |
212 | RET_VOID, /* function doesn't return anything */ | |
3e6a4b3e | 213 | RET_PTR_TO_MAP_VALUE, /* returns a pointer to map elem value */ |
17a52670 | 214 | RET_PTR_TO_MAP_VALUE_OR_NULL, /* returns a pointer to map elem value or NULL */ |
c64b7983 | 215 | RET_PTR_TO_SOCKET_OR_NULL, /* returns a pointer to a socket or NULL */ |
655a51e5 | 216 | RET_PTR_TO_TCP_SOCK_OR_NULL, /* returns a pointer to a tcp_sock or NULL */ |
85a51f8c | 217 | RET_PTR_TO_SOCK_COMMON_OR_NULL, /* returns a pointer to a sock_common or NULL */ |
17a52670 AS |
218 | }; |
219 | ||
09756af4 AS |
220 | /* eBPF function prototype used by verifier to allow BPF_CALLs from eBPF programs |
221 | * to in-kernel helper functions and for adjusting imm32 field in BPF_CALL | |
222 | * instructions after verifying | |
223 | */ | |
224 | struct bpf_func_proto { | |
225 | u64 (*func)(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5); | |
226 | bool gpl_only; | |
36bbef52 | 227 | bool pkt_access; |
17a52670 AS |
228 | enum bpf_return_type ret_type; |
229 | enum bpf_arg_type arg1_type; | |
230 | enum bpf_arg_type arg2_type; | |
231 | enum bpf_arg_type arg3_type; | |
232 | enum bpf_arg_type arg4_type; | |
233 | enum bpf_arg_type arg5_type; | |
234 | }; | |
235 | ||
236 | /* bpf_context is intentionally undefined structure. Pointer to bpf_context is | |
237 | * the first argument to eBPF programs. | |
238 | * For socket filters: 'struct bpf_context *' == 'struct sk_buff *' | |
239 | */ | |
240 | struct bpf_context; | |
241 | ||
242 | enum bpf_access_type { | |
243 | BPF_READ = 1, | |
244 | BPF_WRITE = 2 | |
09756af4 AS |
245 | }; |
246 | ||
19de99f7 | 247 | /* types of values stored in eBPF registers */ |
f1174f77 EC |
248 | /* Pointer types represent: |
249 | * pointer | |
250 | * pointer + imm | |
251 | * pointer + (u16) var | |
252 | * pointer + (u16) var + imm | |
253 | * if (range > 0) then [ptr, ptr + range - off) is safe to access | |
254 | * if (id > 0) means that some 'var' was added | |
255 | * if (off > 0) means that 'imm' was added | |
256 | */ | |
19de99f7 AS |
257 | enum bpf_reg_type { |
258 | NOT_INIT = 0, /* nothing was written into register */ | |
f1174f77 | 259 | SCALAR_VALUE, /* reg doesn't contain a valid pointer */ |
19de99f7 AS |
260 | PTR_TO_CTX, /* reg points to bpf_context */ |
261 | CONST_PTR_TO_MAP, /* reg points to struct bpf_map */ | |
262 | PTR_TO_MAP_VALUE, /* reg points to map element value */ | |
263 | PTR_TO_MAP_VALUE_OR_NULL,/* points to map elem value or NULL */ | |
f1174f77 | 264 | PTR_TO_STACK, /* reg == frame_pointer + offset */ |
de8f3a83 | 265 | PTR_TO_PACKET_META, /* skb->data - meta_len */ |
f1174f77 | 266 | PTR_TO_PACKET, /* reg points to skb->data */ |
19de99f7 | 267 | PTR_TO_PACKET_END, /* skb->data + headlen */ |
d58e468b | 268 | PTR_TO_FLOW_KEYS, /* reg points to bpf_flow_keys */ |
c64b7983 JS |
269 | PTR_TO_SOCKET, /* reg points to struct bpf_sock */ |
270 | PTR_TO_SOCKET_OR_NULL, /* reg points to struct bpf_sock or NULL */ | |
46f8bc92 MKL |
271 | PTR_TO_SOCK_COMMON, /* reg points to sock_common */ |
272 | PTR_TO_SOCK_COMMON_OR_NULL, /* reg points to sock_common or NULL */ | |
655a51e5 MKL |
273 | PTR_TO_TCP_SOCK, /* reg points to struct tcp_sock */ |
274 | PTR_TO_TCP_SOCK_OR_NULL, /* reg points to struct tcp_sock or NULL */ | |
9df1c28b | 275 | PTR_TO_TP_BUFFER, /* reg points to a writable raw tp's buffer */ |
19de99f7 AS |
276 | }; |
277 | ||
23994631 YS |
278 | /* The information passed from prog-specific *_is_valid_access |
279 | * back to the verifier. | |
280 | */ | |
281 | struct bpf_insn_access_aux { | |
282 | enum bpf_reg_type reg_type; | |
283 | int ctx_field_size; | |
23994631 YS |
284 | }; |
285 | ||
f96da094 DB |
286 | static inline void |
287 | bpf_ctx_record_field_size(struct bpf_insn_access_aux *aux, u32 size) | |
288 | { | |
289 | aux->ctx_field_size = size; | |
290 | } | |
291 | ||
7de16e3a JK |
292 | struct bpf_prog_ops { |
293 | int (*test_run)(struct bpf_prog *prog, const union bpf_attr *kattr, | |
294 | union bpf_attr __user *uattr); | |
295 | }; | |
296 | ||
09756af4 AS |
297 | struct bpf_verifier_ops { |
298 | /* return eBPF function prototype for verification */ | |
5e43f899 AI |
299 | const struct bpf_func_proto * |
300 | (*get_func_proto)(enum bpf_func_id func_id, | |
301 | const struct bpf_prog *prog); | |
17a52670 AS |
302 | |
303 | /* return true if 'size' wide access at offset 'off' within bpf_context | |
304 | * with 'type' (read or write) is allowed | |
305 | */ | |
19de99f7 | 306 | bool (*is_valid_access)(int off, int size, enum bpf_access_type type, |
5e43f899 | 307 | const struct bpf_prog *prog, |
23994631 | 308 | struct bpf_insn_access_aux *info); |
36bbef52 DB |
309 | int (*gen_prologue)(struct bpf_insn *insn, bool direct_write, |
310 | const struct bpf_prog *prog); | |
e0cea7ce DB |
311 | int (*gen_ld_abs)(const struct bpf_insn *orig, |
312 | struct bpf_insn *insn_buf); | |
6b8cc1d1 DB |
313 | u32 (*convert_ctx_access)(enum bpf_access_type type, |
314 | const struct bpf_insn *src, | |
315 | struct bpf_insn *dst, | |
f96da094 | 316 | struct bpf_prog *prog, u32 *target_size); |
09756af4 AS |
317 | }; |
318 | ||
cae1927c | 319 | struct bpf_prog_offload_ops { |
08ca90af | 320 | /* verifier basic callbacks */ |
cae1927c JK |
321 | int (*insn_hook)(struct bpf_verifier_env *env, |
322 | int insn_idx, int prev_insn_idx); | |
c941ce9c | 323 | int (*finalize)(struct bpf_verifier_env *env); |
08ca90af JK |
324 | /* verifier optimization callbacks (called after .finalize) */ |
325 | int (*replace_insn)(struct bpf_verifier_env *env, u32 off, | |
326 | struct bpf_insn *insn); | |
327 | int (*remove_insns)(struct bpf_verifier_env *env, u32 off, u32 cnt); | |
328 | /* program management callbacks */ | |
16a8cb5c QM |
329 | int (*prepare)(struct bpf_prog *prog); |
330 | int (*translate)(struct bpf_prog *prog); | |
eb911947 | 331 | void (*destroy)(struct bpf_prog *prog); |
cae1927c JK |
332 | }; |
333 | ||
0a9c1991 | 334 | struct bpf_prog_offload { |
ab3f0063 JK |
335 | struct bpf_prog *prog; |
336 | struct net_device *netdev; | |
341b3e7b | 337 | struct bpf_offload_dev *offdev; |
ab3f0063 JK |
338 | void *dev_priv; |
339 | struct list_head offloads; | |
340 | bool dev_state; | |
08ca90af | 341 | bool opt_failed; |
fcfb126d JW |
342 | void *jited_image; |
343 | u32 jited_len; | |
ab3f0063 JK |
344 | }; |
345 | ||
8bad74f9 RG |
346 | enum bpf_cgroup_storage_type { |
347 | BPF_CGROUP_STORAGE_SHARED, | |
b741f163 | 348 | BPF_CGROUP_STORAGE_PERCPU, |
8bad74f9 RG |
349 | __BPF_CGROUP_STORAGE_MAX |
350 | }; | |
351 | ||
352 | #define MAX_BPF_CGROUP_STORAGE_TYPE __BPF_CGROUP_STORAGE_MAX | |
353 | ||
492ecee8 AS |
354 | struct bpf_prog_stats { |
355 | u64 cnt; | |
356 | u64 nsecs; | |
357 | struct u64_stats_sync syncp; | |
358 | }; | |
359 | ||
09756af4 AS |
360 | struct bpf_prog_aux { |
361 | atomic_t refcnt; | |
24701ece | 362 | u32 used_map_cnt; |
32bbe007 | 363 | u32 max_ctx_offset; |
e647815a | 364 | u32 max_pkt_offset; |
9df1c28b | 365 | u32 max_tp_access; |
8726679a | 366 | u32 stack_depth; |
dc4bb0e2 | 367 | u32 id; |
ba64e7d8 YS |
368 | u32 func_cnt; /* used by non-func prog as the number of func progs */ |
369 | u32 func_idx; /* 0 for non-func prog, the index in func array for func prog */ | |
9a18eedb | 370 | bool offload_requested; |
1c2a088a AS |
371 | struct bpf_prog **func; |
372 | void *jit_data; /* JIT specific data. arch dependent */ | |
74451e66 DB |
373 | struct latch_tree_node ksym_tnode; |
374 | struct list_head ksym_lnode; | |
7de16e3a | 375 | const struct bpf_prog_ops *ops; |
09756af4 | 376 | struct bpf_map **used_maps; |
09756af4 | 377 | struct bpf_prog *prog; |
aaac3ba9 | 378 | struct user_struct *user; |
cb4d2b3f | 379 | u64 load_time; /* ns since boottime */ |
8bad74f9 | 380 | struct bpf_map *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE]; |
067cae47 | 381 | char name[BPF_OBJ_NAME_LEN]; |
afdb09c7 CF |
382 | #ifdef CONFIG_SECURITY |
383 | void *security; | |
384 | #endif | |
0a9c1991 | 385 | struct bpf_prog_offload *offload; |
838e9690 | 386 | struct btf *btf; |
ba64e7d8 | 387 | struct bpf_func_info *func_info; |
c454a46b MKL |
388 | /* bpf_line_info loaded from userspace. linfo->insn_off |
389 | * has the xlated insn offset. | |
390 | * Both the main and sub prog share the same linfo. | |
391 | * The subprog can access its first linfo by | |
392 | * using the linfo_idx. | |
393 | */ | |
394 | struct bpf_line_info *linfo; | |
395 | /* jited_linfo is the jited addr of the linfo. It has a | |
396 | * one to one mapping to linfo: | |
397 | * jited_linfo[i] is the jited addr for the linfo[i]->insn_off. | |
398 | * Both the main and sub prog share the same jited_linfo. | |
399 | * The subprog can access its first jited_linfo by | |
400 | * using the linfo_idx. | |
401 | */ | |
402 | void **jited_linfo; | |
ba64e7d8 | 403 | u32 func_info_cnt; |
c454a46b MKL |
404 | u32 nr_linfo; |
405 | /* subprog can use linfo_idx to access its first linfo and | |
406 | * jited_linfo. | |
407 | * main prog always has linfo_idx == 0 | |
408 | */ | |
409 | u32 linfo_idx; | |
492ecee8 | 410 | struct bpf_prog_stats __percpu *stats; |
abf2e7d6 AS |
411 | union { |
412 | struct work_struct work; | |
413 | struct rcu_head rcu; | |
414 | }; | |
09756af4 AS |
415 | }; |
416 | ||
04fd61ab AS |
417 | struct bpf_array { |
418 | struct bpf_map map; | |
419 | u32 elem_size; | |
b2157399 | 420 | u32 index_mask; |
04fd61ab AS |
421 | /* 'ownership' of prog_array is claimed by the first program that |
422 | * is going to use this map or by the first program which FD is stored | |
423 | * in the map to make sure that all callers and callees have the same | |
424 | * prog_type and JITed flag | |
425 | */ | |
426 | enum bpf_prog_type owner_prog_type; | |
427 | bool owner_jited; | |
428 | union { | |
429 | char value[0] __aligned(8); | |
2a36f0b9 | 430 | void *ptrs[0] __aligned(8); |
a10423b8 | 431 | void __percpu *pptrs[0] __aligned(8); |
04fd61ab AS |
432 | }; |
433 | }; | |
3b1efb19 | 434 | |
c04c0d2b | 435 | #define BPF_COMPLEXITY_LIMIT_INSNS 1000000 /* yes. 1M insns */ |
04fd61ab AS |
436 | #define MAX_TAIL_CALL_CNT 32 |
437 | ||
591fe988 DB |
438 | #define BPF_F_ACCESS_MASK (BPF_F_RDONLY | \ |
439 | BPF_F_RDONLY_PROG | \ | |
440 | BPF_F_WRONLY | \ | |
441 | BPF_F_WRONLY_PROG) | |
442 | ||
443 | #define BPF_MAP_CAN_READ BIT(0) | |
444 | #define BPF_MAP_CAN_WRITE BIT(1) | |
445 | ||
446 | static inline u32 bpf_map_flags_to_cap(struct bpf_map *map) | |
447 | { | |
448 | u32 access_flags = map->map_flags & (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG); | |
449 | ||
450 | /* Combination of BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG is | |
451 | * not possible. | |
452 | */ | |
453 | if (access_flags & BPF_F_RDONLY_PROG) | |
454 | return BPF_MAP_CAN_READ; | |
455 | else if (access_flags & BPF_F_WRONLY_PROG) | |
456 | return BPF_MAP_CAN_WRITE; | |
457 | else | |
458 | return BPF_MAP_CAN_READ | BPF_MAP_CAN_WRITE; | |
459 | } | |
460 | ||
461 | static inline bool bpf_map_flags_access_ok(u32 access_flags) | |
462 | { | |
463 | return (access_flags & (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG)) != | |
464 | (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG); | |
465 | } | |
466 | ||
3b1efb19 DB |
467 | struct bpf_event_entry { |
468 | struct perf_event *event; | |
469 | struct file *perf_file; | |
470 | struct file *map_file; | |
471 | struct rcu_head rcu; | |
472 | }; | |
473 | ||
04fd61ab | 474 | bool bpf_prog_array_compatible(struct bpf_array *array, const struct bpf_prog *fp); |
f1f7714e | 475 | int bpf_prog_calc_tag(struct bpf_prog *fp); |
bd570ff9 | 476 | |
0756ea3e | 477 | const struct bpf_func_proto *bpf_get_trace_printk_proto(void); |
555c8a86 DB |
478 | |
479 | typedef unsigned long (*bpf_ctx_copy_t)(void *dst, const void *src, | |
aa7145c1 | 480 | unsigned long off, unsigned long len); |
c64b7983 JS |
481 | typedef u32 (*bpf_convert_ctx_access_t)(enum bpf_access_type type, |
482 | const struct bpf_insn *src, | |
483 | struct bpf_insn *dst, | |
484 | struct bpf_prog *prog, | |
485 | u32 *target_size); | |
555c8a86 DB |
486 | |
487 | u64 bpf_event_output(struct bpf_map *map, u64 flags, void *meta, u64 meta_size, | |
488 | void *ctx, u64 ctx_size, bpf_ctx_copy_t ctx_copy); | |
04fd61ab | 489 | |
324bda9e AS |
490 | /* an array of programs to be executed under rcu_lock. |
491 | * | |
492 | * Typical usage: | |
493 | * ret = BPF_PROG_RUN_ARRAY(&bpf_prog_array, ctx, BPF_PROG_RUN); | |
494 | * | |
495 | * the structure returned by bpf_prog_array_alloc() should be populated | |
496 | * with program pointers and the last pointer must be NULL. | |
497 | * The user has to keep refcnt on the program and make sure the program | |
498 | * is removed from the array before bpf_prog_put(). | |
499 | * The 'struct bpf_prog_array *' should only be replaced with xchg() | |
500 | * since other cpus are walking the array of pointers in parallel. | |
501 | */ | |
394e40a2 RG |
502 | struct bpf_prog_array_item { |
503 | struct bpf_prog *prog; | |
8bad74f9 | 504 | struct bpf_cgroup_storage *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE]; |
394e40a2 RG |
505 | }; |
506 | ||
324bda9e AS |
507 | struct bpf_prog_array { |
508 | struct rcu_head rcu; | |
394e40a2 | 509 | struct bpf_prog_array_item items[0]; |
324bda9e AS |
510 | }; |
511 | ||
d29ab6e1 | 512 | struct bpf_prog_array *bpf_prog_array_alloc(u32 prog_cnt, gfp_t flags); |
324bda9e | 513 | void bpf_prog_array_free(struct bpf_prog_array __rcu *progs); |
468e2f64 AS |
514 | int bpf_prog_array_length(struct bpf_prog_array __rcu *progs); |
515 | int bpf_prog_array_copy_to_user(struct bpf_prog_array __rcu *progs, | |
516 | __u32 __user *prog_ids, u32 cnt); | |
324bda9e | 517 | |
e87c6bc3 YS |
518 | void bpf_prog_array_delete_safe(struct bpf_prog_array __rcu *progs, |
519 | struct bpf_prog *old_prog); | |
f371b304 | 520 | int bpf_prog_array_copy_info(struct bpf_prog_array __rcu *array, |
3a38bb98 YS |
521 | u32 *prog_ids, u32 request_cnt, |
522 | u32 *prog_cnt); | |
e87c6bc3 YS |
523 | int bpf_prog_array_copy(struct bpf_prog_array __rcu *old_array, |
524 | struct bpf_prog *exclude_prog, | |
525 | struct bpf_prog *include_prog, | |
526 | struct bpf_prog_array **new_array); | |
527 | ||
528 | #define __BPF_PROG_RUN_ARRAY(array, ctx, func, check_non_null) \ | |
324bda9e | 529 | ({ \ |
394e40a2 RG |
530 | struct bpf_prog_array_item *_item; \ |
531 | struct bpf_prog *_prog; \ | |
e87c6bc3 | 532 | struct bpf_prog_array *_array; \ |
324bda9e | 533 | u32 _ret = 1; \ |
6899b32b | 534 | preempt_disable(); \ |
324bda9e | 535 | rcu_read_lock(); \ |
e87c6bc3 YS |
536 | _array = rcu_dereference(array); \ |
537 | if (unlikely(check_non_null && !_array))\ | |
538 | goto _out; \ | |
394e40a2 RG |
539 | _item = &_array->items[0]; \ |
540 | while ((_prog = READ_ONCE(_item->prog))) { \ | |
541 | bpf_cgroup_storage_set(_item->cgroup_storage); \ | |
542 | _ret &= func(_prog, ctx); \ | |
543 | _item++; \ | |
e87c6bc3 YS |
544 | } \ |
545 | _out: \ | |
324bda9e | 546 | rcu_read_unlock(); \ |
6899b32b | 547 | preempt_enable_no_resched(); \ |
324bda9e AS |
548 | _ret; \ |
549 | }) | |
550 | ||
e87c6bc3 YS |
551 | #define BPF_PROG_RUN_ARRAY(array, ctx, func) \ |
552 | __BPF_PROG_RUN_ARRAY(array, ctx, func, false) | |
553 | ||
554 | #define BPF_PROG_RUN_ARRAY_CHECK(array, ctx, func) \ | |
555 | __BPF_PROG_RUN_ARRAY(array, ctx, func, true) | |
556 | ||
89aa0758 | 557 | #ifdef CONFIG_BPF_SYSCALL |
b121d1e7 AS |
558 | DECLARE_PER_CPU(int, bpf_prog_active); |
559 | ||
f66e448c CF |
560 | extern const struct file_operations bpf_map_fops; |
561 | extern const struct file_operations bpf_prog_fops; | |
562 | ||
7de16e3a JK |
563 | #define BPF_PROG_TYPE(_id, _name) \ |
564 | extern const struct bpf_prog_ops _name ## _prog_ops; \ | |
565 | extern const struct bpf_verifier_ops _name ## _verifier_ops; | |
40077e0c JB |
566 | #define BPF_MAP_TYPE(_id, _ops) \ |
567 | extern const struct bpf_map_ops _ops; | |
be9370a7 JB |
568 | #include <linux/bpf_types.h> |
569 | #undef BPF_PROG_TYPE | |
40077e0c | 570 | #undef BPF_MAP_TYPE |
0fc174de | 571 | |
ab3f0063 | 572 | extern const struct bpf_prog_ops bpf_offload_prog_ops; |
4f9218aa JK |
573 | extern const struct bpf_verifier_ops tc_cls_act_analyzer_ops; |
574 | extern const struct bpf_verifier_ops xdp_analyzer_ops; | |
575 | ||
0fc174de | 576 | struct bpf_prog *bpf_prog_get(u32 ufd); |
248f346f | 577 | struct bpf_prog *bpf_prog_get_type_dev(u32 ufd, enum bpf_prog_type type, |
288b3de5 | 578 | bool attach_drv); |
6d67942d | 579 | struct bpf_prog * __must_check bpf_prog_add(struct bpf_prog *prog, int i); |
c540594f | 580 | void bpf_prog_sub(struct bpf_prog *prog, int i); |
6d67942d | 581 | struct bpf_prog * __must_check bpf_prog_inc(struct bpf_prog *prog); |
a6f6df69 | 582 | struct bpf_prog * __must_check bpf_prog_inc_not_zero(struct bpf_prog *prog); |
61e021f3 | 583 | void bpf_prog_put(struct bpf_prog *prog); |
5ccb071e DB |
584 | int __bpf_prog_charge(struct user_struct *user, u32 pages); |
585 | void __bpf_prog_uncharge(struct user_struct *user, u32 pages); | |
61e021f3 | 586 | |
ad8ad79f | 587 | void bpf_prog_free_id(struct bpf_prog *prog, bool do_idr_lock); |
a3884572 | 588 | void bpf_map_free_id(struct bpf_map *map, bool do_idr_lock); |
ad8ad79f | 589 | |
c9da161c | 590 | struct bpf_map *bpf_map_get_with_uref(u32 ufd); |
c2101297 | 591 | struct bpf_map *__bpf_map_get(struct fd f); |
6d67942d | 592 | struct bpf_map * __must_check bpf_map_inc(struct bpf_map *map, bool uref); |
c9da161c | 593 | void bpf_map_put_with_uref(struct bpf_map *map); |
61e021f3 | 594 | void bpf_map_put(struct bpf_map *map); |
6c905981 | 595 | int bpf_map_precharge_memlock(u32 pages); |
0a4c58f5 RG |
596 | int bpf_map_charge_memlock(struct bpf_map *map, u32 pages); |
597 | void bpf_map_uncharge_memlock(struct bpf_map *map, u32 pages); | |
96eabe7a | 598 | void *bpf_map_area_alloc(size_t size, int numa_node); |
d407bd25 | 599 | void bpf_map_area_free(void *base); |
bd475643 | 600 | void bpf_map_init_from_attr(struct bpf_map *map, union bpf_attr *attr); |
61e021f3 | 601 | |
1be7f75d | 602 | extern int sysctl_unprivileged_bpf_disabled; |
492ecee8 | 603 | extern int sysctl_bpf_stats_enabled; |
1be7f75d | 604 | |
6e71b04a | 605 | int bpf_map_new_fd(struct bpf_map *map, int flags); |
b2197755 DB |
606 | int bpf_prog_new_fd(struct bpf_prog *prog); |
607 | ||
608 | int bpf_obj_pin_user(u32 ufd, const char __user *pathname); | |
6e71b04a | 609 | int bpf_obj_get_user(const char __user *pathname, int flags); |
b2197755 | 610 | |
15a07b33 AS |
611 | int bpf_percpu_hash_copy(struct bpf_map *map, void *key, void *value); |
612 | int bpf_percpu_array_copy(struct bpf_map *map, void *key, void *value); | |
613 | int bpf_percpu_hash_update(struct bpf_map *map, void *key, void *value, | |
614 | u64 flags); | |
615 | int bpf_percpu_array_update(struct bpf_map *map, void *key, void *value, | |
616 | u64 flags); | |
d056a788 | 617 | |
557c0c6e | 618 | int bpf_stackmap_copy(struct bpf_map *map, void *key, void *value); |
15a07b33 | 619 | |
d056a788 DB |
620 | int bpf_fd_array_map_update_elem(struct bpf_map *map, struct file *map_file, |
621 | void *key, void *value, u64 map_flags); | |
14dc6f04 | 622 | int bpf_fd_array_map_lookup_elem(struct bpf_map *map, void *key, u32 *value); |
bcc6b1b7 MKL |
623 | int bpf_fd_htab_map_update_elem(struct bpf_map *map, struct file *map_file, |
624 | void *key, void *value, u64 map_flags); | |
14dc6f04 | 625 | int bpf_fd_htab_map_lookup_elem(struct bpf_map *map, void *key, u32 *value); |
d056a788 | 626 | |
6e71b04a | 627 | int bpf_get_file_flag(int flags); |
dcab51f1 MKL |
628 | int bpf_check_uarg_tail_zero(void __user *uaddr, size_t expected_size, |
629 | size_t actual_size); | |
6e71b04a | 630 | |
15a07b33 AS |
631 | /* memcpy that is used with 8-byte aligned pointers, power-of-8 size and |
632 | * forced to use 'long' read/writes to try to atomically copy long counters. | |
633 | * Best-effort only. No barriers here, since it _will_ race with concurrent | |
634 | * updates from BPF programs. Called from bpf syscall and mostly used with | |
635 | * size 8 or 16 bytes, so ask compiler to inline it. | |
636 | */ | |
637 | static inline void bpf_long_memcpy(void *dst, const void *src, u32 size) | |
638 | { | |
639 | const long *lsrc = src; | |
640 | long *ldst = dst; | |
641 | ||
642 | size /= sizeof(long); | |
643 | while (size--) | |
644 | *ldst++ = *lsrc++; | |
645 | } | |
646 | ||
61e021f3 | 647 | /* verify correctness of eBPF program */ |
838e9690 YS |
648 | int bpf_check(struct bpf_prog **fp, union bpf_attr *attr, |
649 | union bpf_attr __user *uattr); | |
1ea47e01 | 650 | void bpf_patch_call_args(struct bpf_insn *insn, u32 stack_depth); |
46f55cff JF |
651 | |
652 | /* Map specifics */ | |
67f29e07 | 653 | struct xdp_buff; |
6d5fc195 | 654 | struct sk_buff; |
67f29e07 JDB |
655 | |
656 | struct bpf_dtab_netdev *__dev_map_lookup_elem(struct bpf_map *map, u32 key); | |
46f55cff JF |
657 | void __dev_map_insert_ctx(struct bpf_map *map, u32 index); |
658 | void __dev_map_flush(struct bpf_map *map); | |
38edddb8 JDB |
659 | int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp, |
660 | struct net_device *dev_rx); | |
6d5fc195 TM |
661 | int dev_map_generic_redirect(struct bpf_dtab_netdev *dst, struct sk_buff *skb, |
662 | struct bpf_prog *xdp_prog); | |
46f55cff | 663 | |
9c270af3 JDB |
664 | struct bpf_cpu_map_entry *__cpu_map_lookup_elem(struct bpf_map *map, u32 key); |
665 | void __cpu_map_insert_ctx(struct bpf_map *map, u32 index); | |
666 | void __cpu_map_flush(struct bpf_map *map); | |
9c270af3 JDB |
667 | int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu, struct xdp_buff *xdp, |
668 | struct net_device *dev_rx); | |
669 | ||
96eabe7a MKL |
670 | /* Return map's numa specified by userspace */ |
671 | static inline int bpf_map_attr_numa_node(const union bpf_attr *attr) | |
672 | { | |
673 | return (attr->map_flags & BPF_F_NUMA_NODE) ? | |
674 | attr->numa_node : NUMA_NO_NODE; | |
675 | } | |
676 | ||
040ee692 | 677 | struct bpf_prog *bpf_prog_get_type_path(const char *name, enum bpf_prog_type type); |
5dc4c4b7 | 678 | int array_map_alloc_check(union bpf_attr *attr); |
040ee692 | 679 | |
c695865c SF |
680 | int bpf_prog_test_run_xdp(struct bpf_prog *prog, const union bpf_attr *kattr, |
681 | union bpf_attr __user *uattr); | |
682 | int bpf_prog_test_run_skb(struct bpf_prog *prog, const union bpf_attr *kattr, | |
683 | union bpf_attr __user *uattr); | |
684 | int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog, | |
685 | const union bpf_attr *kattr, | |
686 | union bpf_attr __user *uattr); | |
9c270af3 | 687 | #else /* !CONFIG_BPF_SYSCALL */ |
0fc174de DB |
688 | static inline struct bpf_prog *bpf_prog_get(u32 ufd) |
689 | { | |
690 | return ERR_PTR(-EOPNOTSUPP); | |
691 | } | |
692 | ||
248f346f JK |
693 | static inline struct bpf_prog *bpf_prog_get_type_dev(u32 ufd, |
694 | enum bpf_prog_type type, | |
288b3de5 | 695 | bool attach_drv) |
248f346f JK |
696 | { |
697 | return ERR_PTR(-EOPNOTSUPP); | |
698 | } | |
699 | ||
6d67942d DB |
700 | static inline struct bpf_prog * __must_check bpf_prog_add(struct bpf_prog *prog, |
701 | int i) | |
cc2e0b3f BB |
702 | { |
703 | return ERR_PTR(-EOPNOTSUPP); | |
704 | } | |
113214be | 705 | |
c540594f DB |
706 | static inline void bpf_prog_sub(struct bpf_prog *prog, int i) |
707 | { | |
708 | } | |
709 | ||
0fc174de DB |
710 | static inline void bpf_prog_put(struct bpf_prog *prog) |
711 | { | |
712 | } | |
6d67942d DB |
713 | |
714 | static inline struct bpf_prog * __must_check bpf_prog_inc(struct bpf_prog *prog) | |
aa6a5f3c AS |
715 | { |
716 | return ERR_PTR(-EOPNOTSUPP); | |
717 | } | |
5ccb071e | 718 | |
a6f6df69 JF |
719 | static inline struct bpf_prog *__must_check |
720 | bpf_prog_inc_not_zero(struct bpf_prog *prog) | |
721 | { | |
722 | return ERR_PTR(-EOPNOTSUPP); | |
723 | } | |
724 | ||
5ccb071e DB |
725 | static inline int __bpf_prog_charge(struct user_struct *user, u32 pages) |
726 | { | |
727 | return 0; | |
728 | } | |
729 | ||
730 | static inline void __bpf_prog_uncharge(struct user_struct *user, u32 pages) | |
731 | { | |
732 | } | |
46f55cff | 733 | |
6e71b04a | 734 | static inline int bpf_obj_get_user(const char __user *pathname, int flags) |
98589a09 SL |
735 | { |
736 | return -EOPNOTSUPP; | |
737 | } | |
738 | ||
46f55cff JF |
739 | static inline struct net_device *__dev_map_lookup_elem(struct bpf_map *map, |
740 | u32 key) | |
741 | { | |
742 | return NULL; | |
743 | } | |
744 | ||
745 | static inline void __dev_map_insert_ctx(struct bpf_map *map, u32 index) | |
746 | { | |
747 | } | |
748 | ||
749 | static inline void __dev_map_flush(struct bpf_map *map) | |
750 | { | |
751 | } | |
9c270af3 | 752 | |
67f29e07 JDB |
753 | struct xdp_buff; |
754 | struct bpf_dtab_netdev; | |
755 | ||
756 | static inline | |
38edddb8 JDB |
757 | int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp, |
758 | struct net_device *dev_rx) | |
67f29e07 JDB |
759 | { |
760 | return 0; | |
761 | } | |
762 | ||
6d5fc195 TM |
763 | struct sk_buff; |
764 | ||
765 | static inline int dev_map_generic_redirect(struct bpf_dtab_netdev *dst, | |
766 | struct sk_buff *skb, | |
767 | struct bpf_prog *xdp_prog) | |
768 | { | |
769 | return 0; | |
770 | } | |
771 | ||
9c270af3 JDB |
772 | static inline |
773 | struct bpf_cpu_map_entry *__cpu_map_lookup_elem(struct bpf_map *map, u32 key) | |
774 | { | |
775 | return NULL; | |
776 | } | |
777 | ||
778 | static inline void __cpu_map_insert_ctx(struct bpf_map *map, u32 index) | |
779 | { | |
780 | } | |
781 | ||
782 | static inline void __cpu_map_flush(struct bpf_map *map) | |
783 | { | |
784 | } | |
785 | ||
9c270af3 JDB |
786 | static inline int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu, |
787 | struct xdp_buff *xdp, | |
788 | struct net_device *dev_rx) | |
789 | { | |
790 | return 0; | |
791 | } | |
040ee692 AV |
792 | |
793 | static inline struct bpf_prog *bpf_prog_get_type_path(const char *name, | |
794 | enum bpf_prog_type type) | |
795 | { | |
796 | return ERR_PTR(-EOPNOTSUPP); | |
797 | } | |
c695865c SF |
798 | |
799 | static inline int bpf_prog_test_run_xdp(struct bpf_prog *prog, | |
800 | const union bpf_attr *kattr, | |
801 | union bpf_attr __user *uattr) | |
802 | { | |
803 | return -ENOTSUPP; | |
804 | } | |
805 | ||
806 | static inline int bpf_prog_test_run_skb(struct bpf_prog *prog, | |
807 | const union bpf_attr *kattr, | |
808 | union bpf_attr __user *uattr) | |
809 | { | |
810 | return -ENOTSUPP; | |
811 | } | |
812 | ||
813 | static inline int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog, | |
814 | const union bpf_attr *kattr, | |
815 | union bpf_attr __user *uattr) | |
816 | { | |
817 | return -ENOTSUPP; | |
818 | } | |
61e021f3 | 819 | #endif /* CONFIG_BPF_SYSCALL */ |
09756af4 | 820 | |
479321e9 JK |
821 | static inline struct bpf_prog *bpf_prog_get_type(u32 ufd, |
822 | enum bpf_prog_type type) | |
823 | { | |
824 | return bpf_prog_get_type_dev(ufd, type, false); | |
825 | } | |
826 | ||
040ee692 AV |
827 | bool bpf_prog_get_ok(struct bpf_prog *, enum bpf_prog_type *, bool); |
828 | ||
ab3f0063 JK |
829 | int bpf_prog_offload_compile(struct bpf_prog *prog); |
830 | void bpf_prog_offload_destroy(struct bpf_prog *prog); | |
675fc275 JK |
831 | int bpf_prog_offload_info_fill(struct bpf_prog_info *info, |
832 | struct bpf_prog *prog); | |
ab3f0063 | 833 | |
52775b33 JK |
834 | int bpf_map_offload_info_fill(struct bpf_map_info *info, struct bpf_map *map); |
835 | ||
a3884572 JK |
836 | int bpf_map_offload_lookup_elem(struct bpf_map *map, void *key, void *value); |
837 | int bpf_map_offload_update_elem(struct bpf_map *map, | |
838 | void *key, void *value, u64 flags); | |
839 | int bpf_map_offload_delete_elem(struct bpf_map *map, void *key); | |
840 | int bpf_map_offload_get_next_key(struct bpf_map *map, | |
841 | void *key, void *next_key); | |
842 | ||
09728266 | 843 | bool bpf_offload_prog_map_match(struct bpf_prog *prog, struct bpf_map *map); |
a3884572 | 844 | |
1385d755 | 845 | struct bpf_offload_dev * |
dd27c2e3 | 846 | bpf_offload_dev_create(const struct bpf_prog_offload_ops *ops, void *priv); |
602144c2 | 847 | void bpf_offload_dev_destroy(struct bpf_offload_dev *offdev); |
dd27c2e3 | 848 | void *bpf_offload_dev_priv(struct bpf_offload_dev *offdev); |
602144c2 JK |
849 | int bpf_offload_dev_netdev_register(struct bpf_offload_dev *offdev, |
850 | struct net_device *netdev); | |
851 | void bpf_offload_dev_netdev_unregister(struct bpf_offload_dev *offdev, | |
852 | struct net_device *netdev); | |
fd4f227d | 853 | bool bpf_offload_dev_match(struct bpf_prog *prog, struct net_device *netdev); |
9fd7c555 | 854 | |
ab3f0063 JK |
855 | #if defined(CONFIG_NET) && defined(CONFIG_BPF_SYSCALL) |
856 | int bpf_prog_offload_init(struct bpf_prog *prog, union bpf_attr *attr); | |
857 | ||
0d830032 | 858 | static inline bool bpf_prog_is_dev_bound(const struct bpf_prog_aux *aux) |
ab3f0063 | 859 | { |
9a18eedb | 860 | return aux->offload_requested; |
ab3f0063 | 861 | } |
a3884572 JK |
862 | |
863 | static inline bool bpf_map_is_dev_bound(struct bpf_map *map) | |
864 | { | |
865 | return unlikely(map->ops == &bpf_map_offload_ops); | |
866 | } | |
867 | ||
868 | struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr); | |
869 | void bpf_map_offload_map_free(struct bpf_map *map); | |
ab3f0063 JK |
870 | #else |
871 | static inline int bpf_prog_offload_init(struct bpf_prog *prog, | |
872 | union bpf_attr *attr) | |
873 | { | |
874 | return -EOPNOTSUPP; | |
875 | } | |
876 | ||
877 | static inline bool bpf_prog_is_dev_bound(struct bpf_prog_aux *aux) | |
878 | { | |
879 | return false; | |
880 | } | |
a3884572 JK |
881 | |
882 | static inline bool bpf_map_is_dev_bound(struct bpf_map *map) | |
883 | { | |
884 | return false; | |
885 | } | |
886 | ||
887 | static inline struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr) | |
888 | { | |
889 | return ERR_PTR(-EOPNOTSUPP); | |
890 | } | |
891 | ||
892 | static inline void bpf_map_offload_map_free(struct bpf_map *map) | |
893 | { | |
894 | } | |
ab3f0063 JK |
895 | #endif /* CONFIG_NET && CONFIG_BPF_SYSCALL */ |
896 | ||
604326b4 DB |
897 | #if defined(CONFIG_BPF_STREAM_PARSER) |
898 | int sock_map_prog_update(struct bpf_map *map, struct bpf_prog *prog, u32 which); | |
899 | int sock_map_get_from_fd(const union bpf_attr *attr, struct bpf_prog *prog); | |
6bdc9c4c | 900 | #else |
604326b4 DB |
901 | static inline int sock_map_prog_update(struct bpf_map *map, |
902 | struct bpf_prog *prog, u32 which) | |
464bc0fd JF |
903 | { |
904 | return -EOPNOTSUPP; | |
905 | } | |
fdb5c453 | 906 | |
604326b4 DB |
907 | static inline int sock_map_get_from_fd(const union bpf_attr *attr, |
908 | struct bpf_prog *prog) | |
fdb5c453 SY |
909 | { |
910 | return -EINVAL; | |
911 | } | |
6bdc9c4c JF |
912 | #endif |
913 | ||
fbfc504a BT |
914 | #if defined(CONFIG_XDP_SOCKETS) |
915 | struct xdp_sock; | |
916 | struct xdp_sock *__xsk_map_lookup_elem(struct bpf_map *map, u32 key); | |
917 | int __xsk_map_redirect(struct bpf_map *map, struct xdp_buff *xdp, | |
918 | struct xdp_sock *xs); | |
919 | void __xsk_map_flush(struct bpf_map *map); | |
920 | #else | |
921 | struct xdp_sock; | |
922 | static inline struct xdp_sock *__xsk_map_lookup_elem(struct bpf_map *map, | |
923 | u32 key) | |
924 | { | |
925 | return NULL; | |
926 | } | |
927 | ||
928 | static inline int __xsk_map_redirect(struct bpf_map *map, struct xdp_buff *xdp, | |
929 | struct xdp_sock *xs) | |
930 | { | |
931 | return -EOPNOTSUPP; | |
932 | } | |
933 | ||
934 | static inline void __xsk_map_flush(struct bpf_map *map) | |
935 | { | |
936 | } | |
937 | #endif | |
938 | ||
5dc4c4b7 MKL |
939 | #if defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL) |
940 | void bpf_sk_reuseport_detach(struct sock *sk); | |
941 | int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map, void *key, | |
942 | void *value); | |
943 | int bpf_fd_reuseport_array_update_elem(struct bpf_map *map, void *key, | |
944 | void *value, u64 map_flags); | |
945 | #else | |
946 | static inline void bpf_sk_reuseport_detach(struct sock *sk) | |
947 | { | |
948 | } | |
949 | ||
950 | #ifdef CONFIG_BPF_SYSCALL | |
951 | static inline int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map, | |
952 | void *key, void *value) | |
953 | { | |
954 | return -EOPNOTSUPP; | |
955 | } | |
956 | ||
957 | static inline int bpf_fd_reuseport_array_update_elem(struct bpf_map *map, | |
958 | void *key, void *value, | |
959 | u64 map_flags) | |
960 | { | |
961 | return -EOPNOTSUPP; | |
962 | } | |
963 | #endif /* CONFIG_BPF_SYSCALL */ | |
964 | #endif /* defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL) */ | |
965 | ||
d0003ec0 | 966 | /* verifier prototypes for helper functions called from eBPF programs */ |
a2c83fff DB |
967 | extern const struct bpf_func_proto bpf_map_lookup_elem_proto; |
968 | extern const struct bpf_func_proto bpf_map_update_elem_proto; | |
969 | extern const struct bpf_func_proto bpf_map_delete_elem_proto; | |
f1a2e44a MV |
970 | extern const struct bpf_func_proto bpf_map_push_elem_proto; |
971 | extern const struct bpf_func_proto bpf_map_pop_elem_proto; | |
972 | extern const struct bpf_func_proto bpf_map_peek_elem_proto; | |
d0003ec0 | 973 | |
03e69b50 | 974 | extern const struct bpf_func_proto bpf_get_prandom_u32_proto; |
c04167ce | 975 | extern const struct bpf_func_proto bpf_get_smp_processor_id_proto; |
2d0e30c3 | 976 | extern const struct bpf_func_proto bpf_get_numa_node_id_proto; |
04fd61ab | 977 | extern const struct bpf_func_proto bpf_tail_call_proto; |
17ca8cbf | 978 | extern const struct bpf_func_proto bpf_ktime_get_ns_proto; |
ffeedafb AS |
979 | extern const struct bpf_func_proto bpf_get_current_pid_tgid_proto; |
980 | extern const struct bpf_func_proto bpf_get_current_uid_gid_proto; | |
981 | extern const struct bpf_func_proto bpf_get_current_comm_proto; | |
d5a3b1f6 | 982 | extern const struct bpf_func_proto bpf_get_stackid_proto; |
c195651e | 983 | extern const struct bpf_func_proto bpf_get_stack_proto; |
174a79ff | 984 | extern const struct bpf_func_proto bpf_sock_map_update_proto; |
81110384 | 985 | extern const struct bpf_func_proto bpf_sock_hash_update_proto; |
bf6fa2c8 | 986 | extern const struct bpf_func_proto bpf_get_current_cgroup_id_proto; |
604326b4 DB |
987 | extern const struct bpf_func_proto bpf_msg_redirect_hash_proto; |
988 | extern const struct bpf_func_proto bpf_msg_redirect_map_proto; | |
989 | extern const struct bpf_func_proto bpf_sk_redirect_hash_proto; | |
990 | extern const struct bpf_func_proto bpf_sk_redirect_map_proto; | |
d83525ca AS |
991 | extern const struct bpf_func_proto bpf_spin_lock_proto; |
992 | extern const struct bpf_func_proto bpf_spin_unlock_proto; | |
cd339431 | 993 | extern const struct bpf_func_proto bpf_get_local_storage_proto; |
d7a4cb9b AI |
994 | extern const struct bpf_func_proto bpf_strtol_proto; |
995 | extern const struct bpf_func_proto bpf_strtoul_proto; | |
cd339431 | 996 | |
3ad00405 DB |
997 | /* Shared helpers among cBPF and eBPF. */ |
998 | void bpf_user_rnd_init_once(void); | |
999 | u64 bpf_user_rnd_u32(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5); | |
1000 | ||
c64b7983 | 1001 | #if defined(CONFIG_NET) |
46f8bc92 MKL |
1002 | bool bpf_sock_common_is_valid_access(int off, int size, |
1003 | enum bpf_access_type type, | |
1004 | struct bpf_insn_access_aux *info); | |
c64b7983 JS |
1005 | bool bpf_sock_is_valid_access(int off, int size, enum bpf_access_type type, |
1006 | struct bpf_insn_access_aux *info); | |
1007 | u32 bpf_sock_convert_ctx_access(enum bpf_access_type type, | |
1008 | const struct bpf_insn *si, | |
1009 | struct bpf_insn *insn_buf, | |
1010 | struct bpf_prog *prog, | |
1011 | u32 *target_size); | |
1012 | #else | |
46f8bc92 MKL |
1013 | static inline bool bpf_sock_common_is_valid_access(int off, int size, |
1014 | enum bpf_access_type type, | |
1015 | struct bpf_insn_access_aux *info) | |
1016 | { | |
1017 | return false; | |
1018 | } | |
c64b7983 JS |
1019 | static inline bool bpf_sock_is_valid_access(int off, int size, |
1020 | enum bpf_access_type type, | |
1021 | struct bpf_insn_access_aux *info) | |
1022 | { | |
1023 | return false; | |
1024 | } | |
1025 | static inline u32 bpf_sock_convert_ctx_access(enum bpf_access_type type, | |
1026 | const struct bpf_insn *si, | |
1027 | struct bpf_insn *insn_buf, | |
1028 | struct bpf_prog *prog, | |
1029 | u32 *target_size) | |
1030 | { | |
1031 | return 0; | |
1032 | } | |
1033 | #endif | |
1034 | ||
655a51e5 MKL |
1035 | #ifdef CONFIG_INET |
1036 | bool bpf_tcp_sock_is_valid_access(int off, int size, enum bpf_access_type type, | |
1037 | struct bpf_insn_access_aux *info); | |
1038 | ||
1039 | u32 bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type, | |
1040 | const struct bpf_insn *si, | |
1041 | struct bpf_insn *insn_buf, | |
1042 | struct bpf_prog *prog, | |
1043 | u32 *target_size); | |
1044 | #else | |
1045 | static inline bool bpf_tcp_sock_is_valid_access(int off, int size, | |
1046 | enum bpf_access_type type, | |
1047 | struct bpf_insn_access_aux *info) | |
1048 | { | |
1049 | return false; | |
1050 | } | |
1051 | ||
1052 | static inline u32 bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type, | |
1053 | const struct bpf_insn *si, | |
1054 | struct bpf_insn *insn_buf, | |
1055 | struct bpf_prog *prog, | |
1056 | u32 *target_size) | |
1057 | { | |
1058 | return 0; | |
1059 | } | |
1060 | #endif /* CONFIG_INET */ | |
1061 | ||
99c55f7d | 1062 | #endif /* _LINUX_BPF_H */ |