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