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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> |
99c55f7d | 19 | |
cae1927c | 20 | struct bpf_verifier_env; |
3b1efb19 | 21 | struct perf_event; |
174a79ff | 22 | struct bpf_prog; |
99c55f7d | 23 | struct bpf_map; |
4f738adb | 24 | struct sock; |
99c55f7d AS |
25 | |
26 | /* map is generic key/value storage optionally accesible by eBPF programs */ | |
27 | struct bpf_map_ops { | |
28 | /* funcs callable from userspace (via syscall) */ | |
1110f3a9 | 29 | int (*map_alloc_check)(union bpf_attr *attr); |
99c55f7d | 30 | struct bpf_map *(*map_alloc)(union bpf_attr *attr); |
61d1b6a4 DB |
31 | void (*map_release)(struct bpf_map *map, struct file *map_file); |
32 | void (*map_free)(struct bpf_map *map); | |
db20fd2b | 33 | int (*map_get_next_key)(struct bpf_map *map, void *key, void *next_key); |
ba6b8de4 | 34 | void (*map_release_uref)(struct bpf_map *map); |
db20fd2b AS |
35 | |
36 | /* funcs callable from userspace and from eBPF programs */ | |
37 | void *(*map_lookup_elem)(struct bpf_map *map, void *key); | |
3274f520 | 38 | int (*map_update_elem)(struct bpf_map *map, void *key, void *value, u64 flags); |
db20fd2b | 39 | int (*map_delete_elem)(struct bpf_map *map, void *key); |
2a36f0b9 WN |
40 | |
41 | /* funcs called by prog_array and perf_event_array map */ | |
d056a788 DB |
42 | void *(*map_fd_get_ptr)(struct bpf_map *map, struct file *map_file, |
43 | int fd); | |
44 | void (*map_fd_put_ptr)(void *ptr); | |
81ed18ab | 45 | u32 (*map_gen_lookup)(struct bpf_map *map, struct bpf_insn *insn_buf); |
14dc6f04 | 46 | u32 (*map_fd_sys_lookup_elem)(void *ptr); |
99c55f7d AS |
47 | }; |
48 | ||
49 | struct bpf_map { | |
be95a845 DB |
50 | /* 1st cacheline with read-mostly members of which some |
51 | * are also accessed in fast-path (e.g. ops, max_entries). | |
52 | */ | |
53 | const struct bpf_map_ops *ops ____cacheline_aligned; | |
54 | struct bpf_map *inner_map_meta; | |
55 | #ifdef CONFIG_SECURITY | |
56 | void *security; | |
57 | #endif | |
99c55f7d AS |
58 | enum bpf_map_type map_type; |
59 | u32 key_size; | |
60 | u32 value_size; | |
61 | u32 max_entries; | |
6c905981 | 62 | u32 map_flags; |
aaac3ba9 | 63 | u32 pages; |
f3f1c054 | 64 | u32 id; |
96eabe7a | 65 | int numa_node; |
b2157399 | 66 | bool unpriv_array; |
be95a845 DB |
67 | /* 7 bytes hole */ |
68 | ||
69 | /* 2nd cacheline with misc members to avoid false sharing | |
70 | * particularly with refcounting. | |
71 | */ | |
72 | struct user_struct *user ____cacheline_aligned; | |
73 | atomic_t refcnt; | |
c9da161c | 74 | atomic_t usercnt; |
be95a845 | 75 | struct work_struct work; |
067cae47 | 76 | char name[BPF_OBJ_NAME_LEN]; |
99c55f7d AS |
77 | }; |
78 | ||
a3884572 JK |
79 | struct bpf_offloaded_map; |
80 | ||
81 | struct bpf_map_dev_ops { | |
82 | int (*map_get_next_key)(struct bpf_offloaded_map *map, | |
83 | void *key, void *next_key); | |
84 | int (*map_lookup_elem)(struct bpf_offloaded_map *map, | |
85 | void *key, void *value); | |
86 | int (*map_update_elem)(struct bpf_offloaded_map *map, | |
87 | void *key, void *value, u64 flags); | |
88 | int (*map_delete_elem)(struct bpf_offloaded_map *map, void *key); | |
89 | }; | |
90 | ||
91 | struct bpf_offloaded_map { | |
92 | struct bpf_map map; | |
93 | struct net_device *netdev; | |
94 | const struct bpf_map_dev_ops *dev_ops; | |
95 | void *dev_priv; | |
96 | struct list_head offloads; | |
97 | }; | |
98 | ||
99 | static inline struct bpf_offloaded_map *map_to_offmap(struct bpf_map *map) | |
100 | { | |
101 | return container_of(map, struct bpf_offloaded_map, map); | |
102 | } | |
103 | ||
104 | extern const struct bpf_map_ops bpf_map_offload_ops; | |
105 | ||
17a52670 AS |
106 | /* function argument constraints */ |
107 | enum bpf_arg_type { | |
80f1d68c | 108 | ARG_DONTCARE = 0, /* unused argument in helper function */ |
17a52670 AS |
109 | |
110 | /* the following constraints used to prototype | |
111 | * bpf_map_lookup/update/delete_elem() functions | |
112 | */ | |
113 | ARG_CONST_MAP_PTR, /* const argument used as pointer to bpf_map */ | |
114 | ARG_PTR_TO_MAP_KEY, /* pointer to stack used as map key */ | |
115 | ARG_PTR_TO_MAP_VALUE, /* pointer to stack used as map value */ | |
116 | ||
117 | /* the following constraints used to prototype bpf_memcmp() and other | |
118 | * functions that access data on eBPF program stack | |
119 | */ | |
39f19ebb | 120 | ARG_PTR_TO_MEM, /* pointer to valid memory (stack, packet, map value) */ |
db1ac496 | 121 | ARG_PTR_TO_MEM_OR_NULL, /* pointer to valid memory or NULL */ |
39f19ebb AS |
122 | ARG_PTR_TO_UNINIT_MEM, /* pointer to memory does not need to be initialized, |
123 | * helper function must fill all bytes or clear | |
124 | * them in error case. | |
435faee1 DB |
125 | */ |
126 | ||
39f19ebb AS |
127 | ARG_CONST_SIZE, /* number of bytes accessed from memory */ |
128 | ARG_CONST_SIZE_OR_ZERO, /* number of bytes accessed from memory or 0 */ | |
80f1d68c | 129 | |
608cd71a | 130 | ARG_PTR_TO_CTX, /* pointer to context */ |
80f1d68c | 131 | ARG_ANYTHING, /* any (initialized) argument is ok */ |
17a52670 AS |
132 | }; |
133 | ||
134 | /* type of values returned from helper functions */ | |
135 | enum bpf_return_type { | |
136 | RET_INTEGER, /* function returns integer */ | |
137 | RET_VOID, /* function doesn't return anything */ | |
138 | RET_PTR_TO_MAP_VALUE_OR_NULL, /* returns a pointer to map elem value or NULL */ | |
139 | }; | |
140 | ||
09756af4 AS |
141 | /* eBPF function prototype used by verifier to allow BPF_CALLs from eBPF programs |
142 | * to in-kernel helper functions and for adjusting imm32 field in BPF_CALL | |
143 | * instructions after verifying | |
144 | */ | |
145 | struct bpf_func_proto { | |
146 | u64 (*func)(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5); | |
147 | bool gpl_only; | |
36bbef52 | 148 | bool pkt_access; |
17a52670 AS |
149 | enum bpf_return_type ret_type; |
150 | enum bpf_arg_type arg1_type; | |
151 | enum bpf_arg_type arg2_type; | |
152 | enum bpf_arg_type arg3_type; | |
153 | enum bpf_arg_type arg4_type; | |
154 | enum bpf_arg_type arg5_type; | |
155 | }; | |
156 | ||
157 | /* bpf_context is intentionally undefined structure. Pointer to bpf_context is | |
158 | * the first argument to eBPF programs. | |
159 | * For socket filters: 'struct bpf_context *' == 'struct sk_buff *' | |
160 | */ | |
161 | struct bpf_context; | |
162 | ||
163 | enum bpf_access_type { | |
164 | BPF_READ = 1, | |
165 | BPF_WRITE = 2 | |
09756af4 AS |
166 | }; |
167 | ||
19de99f7 | 168 | /* types of values stored in eBPF registers */ |
f1174f77 EC |
169 | /* Pointer types represent: |
170 | * pointer | |
171 | * pointer + imm | |
172 | * pointer + (u16) var | |
173 | * pointer + (u16) var + imm | |
174 | * if (range > 0) then [ptr, ptr + range - off) is safe to access | |
175 | * if (id > 0) means that some 'var' was added | |
176 | * if (off > 0) means that 'imm' was added | |
177 | */ | |
19de99f7 AS |
178 | enum bpf_reg_type { |
179 | NOT_INIT = 0, /* nothing was written into register */ | |
f1174f77 | 180 | SCALAR_VALUE, /* reg doesn't contain a valid pointer */ |
19de99f7 AS |
181 | PTR_TO_CTX, /* reg points to bpf_context */ |
182 | CONST_PTR_TO_MAP, /* reg points to struct bpf_map */ | |
183 | PTR_TO_MAP_VALUE, /* reg points to map element value */ | |
184 | PTR_TO_MAP_VALUE_OR_NULL,/* points to map elem value or NULL */ | |
f1174f77 | 185 | PTR_TO_STACK, /* reg == frame_pointer + offset */ |
de8f3a83 | 186 | PTR_TO_PACKET_META, /* skb->data - meta_len */ |
f1174f77 | 187 | PTR_TO_PACKET, /* reg points to skb->data */ |
19de99f7 AS |
188 | PTR_TO_PACKET_END, /* skb->data + headlen */ |
189 | }; | |
190 | ||
23994631 YS |
191 | /* The information passed from prog-specific *_is_valid_access |
192 | * back to the verifier. | |
193 | */ | |
194 | struct bpf_insn_access_aux { | |
195 | enum bpf_reg_type reg_type; | |
196 | int ctx_field_size; | |
23994631 YS |
197 | }; |
198 | ||
f96da094 DB |
199 | static inline void |
200 | bpf_ctx_record_field_size(struct bpf_insn_access_aux *aux, u32 size) | |
201 | { | |
202 | aux->ctx_field_size = size; | |
203 | } | |
204 | ||
7de16e3a JK |
205 | struct bpf_prog_ops { |
206 | int (*test_run)(struct bpf_prog *prog, const union bpf_attr *kattr, | |
207 | union bpf_attr __user *uattr); | |
208 | }; | |
209 | ||
09756af4 AS |
210 | struct bpf_verifier_ops { |
211 | /* return eBPF function prototype for verification */ | |
5e43f899 AI |
212 | const struct bpf_func_proto * |
213 | (*get_func_proto)(enum bpf_func_id func_id, | |
214 | const struct bpf_prog *prog); | |
17a52670 AS |
215 | |
216 | /* return true if 'size' wide access at offset 'off' within bpf_context | |
217 | * with 'type' (read or write) is allowed | |
218 | */ | |
19de99f7 | 219 | bool (*is_valid_access)(int off, int size, enum bpf_access_type type, |
5e43f899 | 220 | const struct bpf_prog *prog, |
23994631 | 221 | struct bpf_insn_access_aux *info); |
36bbef52 DB |
222 | int (*gen_prologue)(struct bpf_insn *insn, bool direct_write, |
223 | const struct bpf_prog *prog); | |
6b8cc1d1 DB |
224 | u32 (*convert_ctx_access)(enum bpf_access_type type, |
225 | const struct bpf_insn *src, | |
226 | struct bpf_insn *dst, | |
f96da094 | 227 | struct bpf_prog *prog, u32 *target_size); |
09756af4 AS |
228 | }; |
229 | ||
cae1927c JK |
230 | struct bpf_prog_offload_ops { |
231 | int (*insn_hook)(struct bpf_verifier_env *env, | |
232 | int insn_idx, int prev_insn_idx); | |
233 | }; | |
234 | ||
0a9c1991 | 235 | struct bpf_prog_offload { |
ab3f0063 JK |
236 | struct bpf_prog *prog; |
237 | struct net_device *netdev; | |
238 | void *dev_priv; | |
239 | struct list_head offloads; | |
240 | bool dev_state; | |
cae1927c | 241 | const struct bpf_prog_offload_ops *dev_ops; |
fcfb126d JW |
242 | void *jited_image; |
243 | u32 jited_len; | |
ab3f0063 JK |
244 | }; |
245 | ||
09756af4 AS |
246 | struct bpf_prog_aux { |
247 | atomic_t refcnt; | |
24701ece | 248 | u32 used_map_cnt; |
32bbe007 | 249 | u32 max_ctx_offset; |
8726679a | 250 | u32 stack_depth; |
dc4bb0e2 | 251 | u32 id; |
1c2a088a | 252 | u32 func_cnt; |
9a18eedb | 253 | bool offload_requested; |
1c2a088a AS |
254 | struct bpf_prog **func; |
255 | void *jit_data; /* JIT specific data. arch dependent */ | |
74451e66 DB |
256 | struct latch_tree_node ksym_tnode; |
257 | struct list_head ksym_lnode; | |
7de16e3a | 258 | const struct bpf_prog_ops *ops; |
09756af4 | 259 | struct bpf_map **used_maps; |
09756af4 | 260 | struct bpf_prog *prog; |
aaac3ba9 | 261 | struct user_struct *user; |
cb4d2b3f | 262 | u64 load_time; /* ns since boottime */ |
067cae47 | 263 | char name[BPF_OBJ_NAME_LEN]; |
afdb09c7 CF |
264 | #ifdef CONFIG_SECURITY |
265 | void *security; | |
266 | #endif | |
0a9c1991 | 267 | struct bpf_prog_offload *offload; |
abf2e7d6 AS |
268 | union { |
269 | struct work_struct work; | |
270 | struct rcu_head rcu; | |
271 | }; | |
09756af4 AS |
272 | }; |
273 | ||
04fd61ab AS |
274 | struct bpf_array { |
275 | struct bpf_map map; | |
276 | u32 elem_size; | |
b2157399 | 277 | u32 index_mask; |
04fd61ab AS |
278 | /* 'ownership' of prog_array is claimed by the first program that |
279 | * is going to use this map or by the first program which FD is stored | |
280 | * in the map to make sure that all callers and callees have the same | |
281 | * prog_type and JITed flag | |
282 | */ | |
283 | enum bpf_prog_type owner_prog_type; | |
284 | bool owner_jited; | |
285 | union { | |
286 | char value[0] __aligned(8); | |
2a36f0b9 | 287 | void *ptrs[0] __aligned(8); |
a10423b8 | 288 | void __percpu *pptrs[0] __aligned(8); |
04fd61ab AS |
289 | }; |
290 | }; | |
3b1efb19 | 291 | |
04fd61ab AS |
292 | #define MAX_TAIL_CALL_CNT 32 |
293 | ||
3b1efb19 DB |
294 | struct bpf_event_entry { |
295 | struct perf_event *event; | |
296 | struct file *perf_file; | |
297 | struct file *map_file; | |
298 | struct rcu_head rcu; | |
299 | }; | |
300 | ||
04fd61ab | 301 | bool bpf_prog_array_compatible(struct bpf_array *array, const struct bpf_prog *fp); |
f1f7714e | 302 | int bpf_prog_calc_tag(struct bpf_prog *fp); |
bd570ff9 | 303 | |
0756ea3e | 304 | const struct bpf_func_proto *bpf_get_trace_printk_proto(void); |
555c8a86 DB |
305 | |
306 | typedef unsigned long (*bpf_ctx_copy_t)(void *dst, const void *src, | |
aa7145c1 | 307 | unsigned long off, unsigned long len); |
555c8a86 DB |
308 | |
309 | u64 bpf_event_output(struct bpf_map *map, u64 flags, void *meta, u64 meta_size, | |
310 | void *ctx, u64 ctx_size, bpf_ctx_copy_t ctx_copy); | |
04fd61ab | 311 | |
1cf1cae9 AS |
312 | int bpf_prog_test_run_xdp(struct bpf_prog *prog, const union bpf_attr *kattr, |
313 | union bpf_attr __user *uattr); | |
314 | int bpf_prog_test_run_skb(struct bpf_prog *prog, const union bpf_attr *kattr, | |
315 | union bpf_attr __user *uattr); | |
316 | ||
324bda9e AS |
317 | /* an array of programs to be executed under rcu_lock. |
318 | * | |
319 | * Typical usage: | |
320 | * ret = BPF_PROG_RUN_ARRAY(&bpf_prog_array, ctx, BPF_PROG_RUN); | |
321 | * | |
322 | * the structure returned by bpf_prog_array_alloc() should be populated | |
323 | * with program pointers and the last pointer must be NULL. | |
324 | * The user has to keep refcnt on the program and make sure the program | |
325 | * is removed from the array before bpf_prog_put(). | |
326 | * The 'struct bpf_prog_array *' should only be replaced with xchg() | |
327 | * since other cpus are walking the array of pointers in parallel. | |
328 | */ | |
329 | struct bpf_prog_array { | |
330 | struct rcu_head rcu; | |
331 | struct bpf_prog *progs[0]; | |
332 | }; | |
333 | ||
334 | struct bpf_prog_array __rcu *bpf_prog_array_alloc(u32 prog_cnt, gfp_t flags); | |
335 | void bpf_prog_array_free(struct bpf_prog_array __rcu *progs); | |
468e2f64 AS |
336 | int bpf_prog_array_length(struct bpf_prog_array __rcu *progs); |
337 | int bpf_prog_array_copy_to_user(struct bpf_prog_array __rcu *progs, | |
338 | __u32 __user *prog_ids, u32 cnt); | |
324bda9e | 339 | |
e87c6bc3 YS |
340 | void bpf_prog_array_delete_safe(struct bpf_prog_array __rcu *progs, |
341 | struct bpf_prog *old_prog); | |
f371b304 | 342 | int bpf_prog_array_copy_info(struct bpf_prog_array __rcu *array, |
3a38bb98 YS |
343 | u32 *prog_ids, u32 request_cnt, |
344 | u32 *prog_cnt); | |
e87c6bc3 YS |
345 | int bpf_prog_array_copy(struct bpf_prog_array __rcu *old_array, |
346 | struct bpf_prog *exclude_prog, | |
347 | struct bpf_prog *include_prog, | |
348 | struct bpf_prog_array **new_array); | |
349 | ||
350 | #define __BPF_PROG_RUN_ARRAY(array, ctx, func, check_non_null) \ | |
324bda9e | 351 | ({ \ |
e87c6bc3 YS |
352 | struct bpf_prog **_prog, *__prog; \ |
353 | struct bpf_prog_array *_array; \ | |
324bda9e | 354 | u32 _ret = 1; \ |
6899b32b | 355 | preempt_disable(); \ |
324bda9e | 356 | rcu_read_lock(); \ |
e87c6bc3 YS |
357 | _array = rcu_dereference(array); \ |
358 | if (unlikely(check_non_null && !_array))\ | |
359 | goto _out; \ | |
360 | _prog = _array->progs; \ | |
361 | while ((__prog = READ_ONCE(*_prog))) { \ | |
362 | _ret &= func(__prog, ctx); \ | |
363 | _prog++; \ | |
364 | } \ | |
365 | _out: \ | |
324bda9e | 366 | rcu_read_unlock(); \ |
6899b32b | 367 | preempt_enable_no_resched(); \ |
324bda9e AS |
368 | _ret; \ |
369 | }) | |
370 | ||
e87c6bc3 YS |
371 | #define BPF_PROG_RUN_ARRAY(array, ctx, func) \ |
372 | __BPF_PROG_RUN_ARRAY(array, ctx, func, false) | |
373 | ||
374 | #define BPF_PROG_RUN_ARRAY_CHECK(array, ctx, func) \ | |
375 | __BPF_PROG_RUN_ARRAY(array, ctx, func, true) | |
376 | ||
89aa0758 | 377 | #ifdef CONFIG_BPF_SYSCALL |
b121d1e7 AS |
378 | DECLARE_PER_CPU(int, bpf_prog_active); |
379 | ||
f66e448c CF |
380 | extern const struct file_operations bpf_map_fops; |
381 | extern const struct file_operations bpf_prog_fops; | |
382 | ||
7de16e3a JK |
383 | #define BPF_PROG_TYPE(_id, _name) \ |
384 | extern const struct bpf_prog_ops _name ## _prog_ops; \ | |
385 | extern const struct bpf_verifier_ops _name ## _verifier_ops; | |
40077e0c JB |
386 | #define BPF_MAP_TYPE(_id, _ops) \ |
387 | extern const struct bpf_map_ops _ops; | |
be9370a7 JB |
388 | #include <linux/bpf_types.h> |
389 | #undef BPF_PROG_TYPE | |
40077e0c | 390 | #undef BPF_MAP_TYPE |
0fc174de | 391 | |
ab3f0063 | 392 | extern const struct bpf_prog_ops bpf_offload_prog_ops; |
4f9218aa JK |
393 | extern const struct bpf_verifier_ops tc_cls_act_analyzer_ops; |
394 | extern const struct bpf_verifier_ops xdp_analyzer_ops; | |
395 | ||
0fc174de | 396 | struct bpf_prog *bpf_prog_get(u32 ufd); |
248f346f | 397 | struct bpf_prog *bpf_prog_get_type_dev(u32 ufd, enum bpf_prog_type type, |
288b3de5 | 398 | bool attach_drv); |
6d67942d | 399 | struct bpf_prog * __must_check bpf_prog_add(struct bpf_prog *prog, int i); |
c540594f | 400 | void bpf_prog_sub(struct bpf_prog *prog, int i); |
6d67942d | 401 | struct bpf_prog * __must_check bpf_prog_inc(struct bpf_prog *prog); |
a6f6df69 | 402 | struct bpf_prog * __must_check bpf_prog_inc_not_zero(struct bpf_prog *prog); |
61e021f3 | 403 | void bpf_prog_put(struct bpf_prog *prog); |
5ccb071e DB |
404 | int __bpf_prog_charge(struct user_struct *user, u32 pages); |
405 | void __bpf_prog_uncharge(struct user_struct *user, u32 pages); | |
61e021f3 | 406 | |
ad8ad79f | 407 | void bpf_prog_free_id(struct bpf_prog *prog, bool do_idr_lock); |
a3884572 | 408 | void bpf_map_free_id(struct bpf_map *map, bool do_idr_lock); |
ad8ad79f | 409 | |
c9da161c | 410 | struct bpf_map *bpf_map_get_with_uref(u32 ufd); |
c2101297 | 411 | struct bpf_map *__bpf_map_get(struct fd f); |
6d67942d | 412 | struct bpf_map * __must_check bpf_map_inc(struct bpf_map *map, bool uref); |
c9da161c | 413 | void bpf_map_put_with_uref(struct bpf_map *map); |
61e021f3 | 414 | void bpf_map_put(struct bpf_map *map); |
6c905981 | 415 | int bpf_map_precharge_memlock(u32 pages); |
96eabe7a | 416 | void *bpf_map_area_alloc(size_t size, int numa_node); |
d407bd25 | 417 | void bpf_map_area_free(void *base); |
bd475643 | 418 | void bpf_map_init_from_attr(struct bpf_map *map, union bpf_attr *attr); |
61e021f3 | 419 | |
1be7f75d AS |
420 | extern int sysctl_unprivileged_bpf_disabled; |
421 | ||
6e71b04a | 422 | int bpf_map_new_fd(struct bpf_map *map, int flags); |
b2197755 DB |
423 | int bpf_prog_new_fd(struct bpf_prog *prog); |
424 | ||
425 | int bpf_obj_pin_user(u32 ufd, const char __user *pathname); | |
6e71b04a | 426 | int bpf_obj_get_user(const char __user *pathname, int flags); |
b2197755 | 427 | |
15a07b33 AS |
428 | int bpf_percpu_hash_copy(struct bpf_map *map, void *key, void *value); |
429 | int bpf_percpu_array_copy(struct bpf_map *map, void *key, void *value); | |
430 | int bpf_percpu_hash_update(struct bpf_map *map, void *key, void *value, | |
431 | u64 flags); | |
432 | int bpf_percpu_array_update(struct bpf_map *map, void *key, void *value, | |
433 | u64 flags); | |
d056a788 | 434 | |
557c0c6e | 435 | int bpf_stackmap_copy(struct bpf_map *map, void *key, void *value); |
15a07b33 | 436 | |
d056a788 DB |
437 | int bpf_fd_array_map_update_elem(struct bpf_map *map, struct file *map_file, |
438 | void *key, void *value, u64 map_flags); | |
14dc6f04 | 439 | int bpf_fd_array_map_lookup_elem(struct bpf_map *map, void *key, u32 *value); |
bcc6b1b7 MKL |
440 | int bpf_fd_htab_map_update_elem(struct bpf_map *map, struct file *map_file, |
441 | void *key, void *value, u64 map_flags); | |
14dc6f04 | 442 | int bpf_fd_htab_map_lookup_elem(struct bpf_map *map, void *key, u32 *value); |
d056a788 | 443 | |
6e71b04a CF |
444 | int bpf_get_file_flag(int flags); |
445 | ||
15a07b33 AS |
446 | /* memcpy that is used with 8-byte aligned pointers, power-of-8 size and |
447 | * forced to use 'long' read/writes to try to atomically copy long counters. | |
448 | * Best-effort only. No barriers here, since it _will_ race with concurrent | |
449 | * updates from BPF programs. Called from bpf syscall and mostly used with | |
450 | * size 8 or 16 bytes, so ask compiler to inline it. | |
451 | */ | |
452 | static inline void bpf_long_memcpy(void *dst, const void *src, u32 size) | |
453 | { | |
454 | const long *lsrc = src; | |
455 | long *ldst = dst; | |
456 | ||
457 | size /= sizeof(long); | |
458 | while (size--) | |
459 | *ldst++ = *lsrc++; | |
460 | } | |
461 | ||
61e021f3 | 462 | /* verify correctness of eBPF program */ |
9bac3d6d | 463 | int bpf_check(struct bpf_prog **fp, union bpf_attr *attr); |
1ea47e01 | 464 | void bpf_patch_call_args(struct bpf_insn *insn, u32 stack_depth); |
46f55cff JF |
465 | |
466 | /* Map specifics */ | |
467 | struct net_device *__dev_map_lookup_elem(struct bpf_map *map, u32 key); | |
468 | void __dev_map_insert_ctx(struct bpf_map *map, u32 index); | |
469 | void __dev_map_flush(struct bpf_map *map); | |
470 | ||
9c270af3 JDB |
471 | struct bpf_cpu_map_entry *__cpu_map_lookup_elem(struct bpf_map *map, u32 key); |
472 | void __cpu_map_insert_ctx(struct bpf_map *map, u32 index); | |
473 | void __cpu_map_flush(struct bpf_map *map); | |
474 | struct xdp_buff; | |
475 | int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu, struct xdp_buff *xdp, | |
476 | struct net_device *dev_rx); | |
477 | ||
96eabe7a MKL |
478 | /* Return map's numa specified by userspace */ |
479 | static inline int bpf_map_attr_numa_node(const union bpf_attr *attr) | |
480 | { | |
481 | return (attr->map_flags & BPF_F_NUMA_NODE) ? | |
482 | attr->numa_node : NUMA_NO_NODE; | |
483 | } | |
484 | ||
040ee692 AV |
485 | struct bpf_prog *bpf_prog_get_type_path(const char *name, enum bpf_prog_type type); |
486 | ||
9c270af3 | 487 | #else /* !CONFIG_BPF_SYSCALL */ |
0fc174de DB |
488 | static inline struct bpf_prog *bpf_prog_get(u32 ufd) |
489 | { | |
490 | return ERR_PTR(-EOPNOTSUPP); | |
491 | } | |
492 | ||
248f346f JK |
493 | static inline struct bpf_prog *bpf_prog_get_type_dev(u32 ufd, |
494 | enum bpf_prog_type type, | |
288b3de5 | 495 | bool attach_drv) |
248f346f JK |
496 | { |
497 | return ERR_PTR(-EOPNOTSUPP); | |
498 | } | |
499 | ||
6d67942d DB |
500 | static inline struct bpf_prog * __must_check bpf_prog_add(struct bpf_prog *prog, |
501 | int i) | |
cc2e0b3f BB |
502 | { |
503 | return ERR_PTR(-EOPNOTSUPP); | |
504 | } | |
113214be | 505 | |
c540594f DB |
506 | static inline void bpf_prog_sub(struct bpf_prog *prog, int i) |
507 | { | |
508 | } | |
509 | ||
0fc174de DB |
510 | static inline void bpf_prog_put(struct bpf_prog *prog) |
511 | { | |
512 | } | |
6d67942d DB |
513 | |
514 | static inline struct bpf_prog * __must_check bpf_prog_inc(struct bpf_prog *prog) | |
aa6a5f3c AS |
515 | { |
516 | return ERR_PTR(-EOPNOTSUPP); | |
517 | } | |
5ccb071e | 518 | |
a6f6df69 JF |
519 | static inline struct bpf_prog *__must_check |
520 | bpf_prog_inc_not_zero(struct bpf_prog *prog) | |
521 | { | |
522 | return ERR_PTR(-EOPNOTSUPP); | |
523 | } | |
524 | ||
5ccb071e DB |
525 | static inline int __bpf_prog_charge(struct user_struct *user, u32 pages) |
526 | { | |
527 | return 0; | |
528 | } | |
529 | ||
530 | static inline void __bpf_prog_uncharge(struct user_struct *user, u32 pages) | |
531 | { | |
532 | } | |
46f55cff | 533 | |
6e71b04a | 534 | static inline int bpf_obj_get_user(const char __user *pathname, int flags) |
98589a09 SL |
535 | { |
536 | return -EOPNOTSUPP; | |
537 | } | |
538 | ||
46f55cff JF |
539 | static inline struct net_device *__dev_map_lookup_elem(struct bpf_map *map, |
540 | u32 key) | |
541 | { | |
542 | return NULL; | |
543 | } | |
544 | ||
545 | static inline void __dev_map_insert_ctx(struct bpf_map *map, u32 index) | |
546 | { | |
547 | } | |
548 | ||
549 | static inline void __dev_map_flush(struct bpf_map *map) | |
550 | { | |
551 | } | |
9c270af3 JDB |
552 | |
553 | static inline | |
554 | struct bpf_cpu_map_entry *__cpu_map_lookup_elem(struct bpf_map *map, u32 key) | |
555 | { | |
556 | return NULL; | |
557 | } | |
558 | ||
559 | static inline void __cpu_map_insert_ctx(struct bpf_map *map, u32 index) | |
560 | { | |
561 | } | |
562 | ||
563 | static inline void __cpu_map_flush(struct bpf_map *map) | |
564 | { | |
565 | } | |
566 | ||
567 | struct xdp_buff; | |
568 | static inline int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu, | |
569 | struct xdp_buff *xdp, | |
570 | struct net_device *dev_rx) | |
571 | { | |
572 | return 0; | |
573 | } | |
040ee692 AV |
574 | |
575 | static inline struct bpf_prog *bpf_prog_get_type_path(const char *name, | |
576 | enum bpf_prog_type type) | |
577 | { | |
578 | return ERR_PTR(-EOPNOTSUPP); | |
579 | } | |
61e021f3 | 580 | #endif /* CONFIG_BPF_SYSCALL */ |
09756af4 | 581 | |
479321e9 JK |
582 | static inline struct bpf_prog *bpf_prog_get_type(u32 ufd, |
583 | enum bpf_prog_type type) | |
584 | { | |
585 | return bpf_prog_get_type_dev(ufd, type, false); | |
586 | } | |
587 | ||
040ee692 AV |
588 | bool bpf_prog_get_ok(struct bpf_prog *, enum bpf_prog_type *, bool); |
589 | ||
ab3f0063 JK |
590 | int bpf_prog_offload_compile(struct bpf_prog *prog); |
591 | void bpf_prog_offload_destroy(struct bpf_prog *prog); | |
675fc275 JK |
592 | int bpf_prog_offload_info_fill(struct bpf_prog_info *info, |
593 | struct bpf_prog *prog); | |
ab3f0063 | 594 | |
52775b33 JK |
595 | int bpf_map_offload_info_fill(struct bpf_map_info *info, struct bpf_map *map); |
596 | ||
a3884572 JK |
597 | int bpf_map_offload_lookup_elem(struct bpf_map *map, void *key, void *value); |
598 | int bpf_map_offload_update_elem(struct bpf_map *map, | |
599 | void *key, void *value, u64 flags); | |
600 | int bpf_map_offload_delete_elem(struct bpf_map *map, void *key); | |
601 | int bpf_map_offload_get_next_key(struct bpf_map *map, | |
602 | void *key, void *next_key); | |
603 | ||
604 | bool bpf_offload_dev_match(struct bpf_prog *prog, struct bpf_map *map); | |
605 | ||
ab3f0063 JK |
606 | #if defined(CONFIG_NET) && defined(CONFIG_BPF_SYSCALL) |
607 | int bpf_prog_offload_init(struct bpf_prog *prog, union bpf_attr *attr); | |
608 | ||
609 | static inline bool bpf_prog_is_dev_bound(struct bpf_prog_aux *aux) | |
610 | { | |
9a18eedb | 611 | return aux->offload_requested; |
ab3f0063 | 612 | } |
a3884572 JK |
613 | |
614 | static inline bool bpf_map_is_dev_bound(struct bpf_map *map) | |
615 | { | |
616 | return unlikely(map->ops == &bpf_map_offload_ops); | |
617 | } | |
618 | ||
619 | struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr); | |
620 | void bpf_map_offload_map_free(struct bpf_map *map); | |
ab3f0063 JK |
621 | #else |
622 | static inline int bpf_prog_offload_init(struct bpf_prog *prog, | |
623 | union bpf_attr *attr) | |
624 | { | |
625 | return -EOPNOTSUPP; | |
626 | } | |
627 | ||
628 | static inline bool bpf_prog_is_dev_bound(struct bpf_prog_aux *aux) | |
629 | { | |
630 | return false; | |
631 | } | |
a3884572 JK |
632 | |
633 | static inline bool bpf_map_is_dev_bound(struct bpf_map *map) | |
634 | { | |
635 | return false; | |
636 | } | |
637 | ||
638 | static inline struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr) | |
639 | { | |
640 | return ERR_PTR(-EOPNOTSUPP); | |
641 | } | |
642 | ||
643 | static inline void bpf_map_offload_map_free(struct bpf_map *map) | |
644 | { | |
645 | } | |
ab3f0063 JK |
646 | #endif /* CONFIG_NET && CONFIG_BPF_SYSCALL */ |
647 | ||
5f103c5d | 648 | #if defined(CONFIG_STREAM_PARSER) && defined(CONFIG_BPF_SYSCALL) && defined(CONFIG_INET) |
6bdc9c4c | 649 | struct sock *__sock_map_lookup_elem(struct bpf_map *map, u32 key); |
5a67da2a | 650 | int sock_map_prog(struct bpf_map *map, struct bpf_prog *prog, u32 type); |
6bdc9c4c JF |
651 | #else |
652 | static inline struct sock *__sock_map_lookup_elem(struct bpf_map *map, u32 key) | |
653 | { | |
654 | return NULL; | |
655 | } | |
464bc0fd | 656 | |
5a67da2a JF |
657 | static inline int sock_map_prog(struct bpf_map *map, |
658 | struct bpf_prog *prog, | |
659 | u32 type) | |
464bc0fd JF |
660 | { |
661 | return -EOPNOTSUPP; | |
662 | } | |
6bdc9c4c JF |
663 | #endif |
664 | ||
d0003ec0 | 665 | /* verifier prototypes for helper functions called from eBPF programs */ |
a2c83fff DB |
666 | extern const struct bpf_func_proto bpf_map_lookup_elem_proto; |
667 | extern const struct bpf_func_proto bpf_map_update_elem_proto; | |
668 | extern const struct bpf_func_proto bpf_map_delete_elem_proto; | |
d0003ec0 | 669 | |
03e69b50 | 670 | extern const struct bpf_func_proto bpf_get_prandom_u32_proto; |
c04167ce | 671 | extern const struct bpf_func_proto bpf_get_smp_processor_id_proto; |
2d0e30c3 | 672 | extern const struct bpf_func_proto bpf_get_numa_node_id_proto; |
04fd61ab | 673 | extern const struct bpf_func_proto bpf_tail_call_proto; |
17ca8cbf | 674 | extern const struct bpf_func_proto bpf_ktime_get_ns_proto; |
ffeedafb AS |
675 | extern const struct bpf_func_proto bpf_get_current_pid_tgid_proto; |
676 | extern const struct bpf_func_proto bpf_get_current_uid_gid_proto; | |
677 | extern const struct bpf_func_proto bpf_get_current_comm_proto; | |
4e10df9a AS |
678 | extern const struct bpf_func_proto bpf_skb_vlan_push_proto; |
679 | extern const struct bpf_func_proto bpf_skb_vlan_pop_proto; | |
d5a3b1f6 | 680 | extern const struct bpf_func_proto bpf_get_stackid_proto; |
174a79ff | 681 | extern const struct bpf_func_proto bpf_sock_map_update_proto; |
03e69b50 | 682 | |
3ad00405 DB |
683 | /* Shared helpers among cBPF and eBPF. */ |
684 | void bpf_user_rnd_init_once(void); | |
685 | u64 bpf_user_rnd_u32(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5); | |
686 | ||
99c55f7d | 687 | #endif /* _LINUX_BPF_H */ |