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eb3f595d MKL |
1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | /* Copyright (c) 2018 Facebook */ | |
3 | ||
4 | #ifndef _LINUX_BTF_H | |
5 | #define _LINUX_BTF_H 1 | |
6 | ||
7 | #include <linux/types.h> | |
14f267d9 | 8 | #include <linux/bpfptr.h> |
8ffa5cc1 KKD |
9 | #include <linux/bsearch.h> |
10 | #include <linux/btf_ids.h> | |
38207291 | 11 | #include <uapi/linux/btf.h> |
c4d0bfb4 | 12 | #include <uapi/linux/bpf.h> |
eb3f595d | 13 | |
85d33df3 | 14 | #define BTF_TYPE_EMIT(type) ((void)(type *)0) |
97a19caf | 15 | #define BTF_TYPE_EMIT_ENUM(enum_val) ((void)enum_val) |
85d33df3 | 16 | |
a4703e31 KKD |
17 | /* These need to be macros, as the expressions are used in assembler input */ |
18 | #define KF_ACQUIRE (1 << 0) /* kfunc is an acquire function */ | |
19 | #define KF_RELEASE (1 << 1) /* kfunc is a release function */ | |
20 | #define KF_RET_NULL (1 << 2) /* kfunc returns a pointer that may be NULL */ | |
3f00c523 DV |
21 | /* Trusted arguments are those which are guaranteed to be valid when passed to |
22 | * the kfunc. It is used to enforce that pointers obtained from either acquire | |
23 | * kfuncs, or from the main kernel on a tracepoint or struct_ops callback | |
24 | * invocation, remain unmodified when being passed to helpers taking trusted | |
25 | * args. | |
26 | * | |
27 | * Consider, for example, the following new task tracepoint: | |
28 | * | |
29 | * SEC("tp_btf/task_newtask") | |
30 | * int BPF_PROG(new_task_tp, struct task_struct *task, u64 clone_flags) | |
31 | * { | |
32 | * ... | |
33 | * } | |
34 | * | |
35 | * And the following kfunc: | |
36 | * | |
37 | * BTF_ID_FLAGS(func, bpf_task_acquire, KF_ACQUIRE | KF_TRUSTED_ARGS) | |
38 | * | |
39 | * All invocations to the kfunc must pass the unmodified, unwalked task: | |
40 | * | |
41 | * bpf_task_acquire(task); // Allowed | |
42 | * bpf_task_acquire(task->last_wakee); // Rejected, walked task | |
43 | * | |
44 | * Programs may also pass referenced tasks directly to the kfunc: | |
45 | * | |
46 | * struct task_struct *acquired; | |
47 | * | |
48 | * acquired = bpf_task_acquire(task); // Allowed, same as above | |
49 | * bpf_task_acquire(acquired); // Allowed | |
50 | * bpf_task_acquire(task); // Allowed | |
51 | * bpf_task_acquire(acquired->last_wakee); // Rejected, walked task | |
52 | * | |
53 | * Programs may _not_, however, pass a task from an arbitrary fentry/fexit, or | |
54 | * kprobe/kretprobe to the kfunc, as BPF cannot guarantee that all of these | |
55 | * pointers are guaranteed to be safe. For example, the following BPF program | |
56 | * would be rejected: | |
57 | * | |
58 | * SEC("kretprobe/free_task") | |
59 | * int BPF_PROG(free_task_probe, struct task_struct *tsk) | |
60 | * { | |
61 | * struct task_struct *acquired; | |
62 | * | |
63 | * acquired = bpf_task_acquire(acquired); // Rejected, not a trusted pointer | |
64 | * bpf_task_release(acquired); | |
65 | * | |
66 | * return 0; | |
67 | * } | |
56e948ff KKD |
68 | */ |
69 | #define KF_TRUSTED_ARGS (1 << 4) /* kfunc only takes trusted pointer arguments */ | |
4dd48c6f AS |
70 | #define KF_SLEEPABLE (1 << 5) /* kfunc may sleep */ |
71 | #define KF_DESTRUCTIVE (1 << 6) /* kfunc performs destructive actions */ | |
20c09d92 | 72 | #define KF_RCU (1 << 7) /* kfunc takes either rcu or trusted pointer arguments */ |
215bf496 AN |
73 | /* only one of KF_ITER_{NEW,NEXT,DESTROY} could be specified per kfunc */ |
74 | #define KF_ITER_NEW (1 << 8) /* kfunc implements BPF iter constructor */ | |
75 | #define KF_ITER_NEXT (1 << 9) /* kfunc implements BPF iter next method */ | |
76 | #define KF_ITER_DESTROY (1 << 10) /* kfunc implements BPF iter destructor */ | |
dee872e1 | 77 | |
57e7c169 DV |
78 | /* |
79 | * Tag marking a kernel function as a kfunc. This is meant to minimize the | |
80 | * amount of copy-paste that kfunc authors have to include for correctness so | |
81 | * as to avoid issues such as the compiler inlining or eliding either a static | |
82 | * kfunc, or a global kfunc in an LTO build. | |
83 | */ | |
84 | #define __bpf_kfunc __used noinline | |
85 | ||
b8d31762 RS |
86 | /* |
87 | * Return the name of the passed struct, if exists, or halt the build if for | |
88 | * example the structure gets renamed. In this way, developers have to revisit | |
89 | * the code using that structure name, and update it accordingly. | |
90 | */ | |
91 | #define stringify_struct(x) \ | |
92 | ({ BUILD_BUG_ON(sizeof(struct x) < 0); \ | |
93 | __stringify(x); }) | |
94 | ||
eb3f595d | 95 | struct btf; |
ffa0c1cf | 96 | struct btf_member; |
eb3f595d | 97 | struct btf_type; |
f56a653c | 98 | union bpf_attr; |
31d0bc81 | 99 | struct btf_show; |
dee872e1 | 100 | struct btf_id_set; |
e924e80e AG |
101 | struct bpf_prog; |
102 | ||
103 | typedef int (*btf_kfunc_filter_t)(const struct bpf_prog *prog, u32 kfunc_id); | |
dee872e1 KKD |
104 | |
105 | struct btf_kfunc_id_set { | |
106 | struct module *owner; | |
a4703e31 | 107 | struct btf_id_set8 *set; |
e924e80e | 108 | btf_kfunc_filter_t filter; |
dee872e1 | 109 | }; |
eb3f595d | 110 | |
5ce937d6 KKD |
111 | struct btf_id_dtor_kfunc { |
112 | u32 btf_id; | |
113 | u32 kfunc_btf_id; | |
114 | }; | |
115 | ||
8ffa5cc1 KKD |
116 | struct btf_struct_meta { |
117 | u32 btf_id; | |
118 | struct btf_record *record; | |
8ffa5cc1 KKD |
119 | }; |
120 | ||
121 | struct btf_struct_metas { | |
122 | u32 cnt; | |
123 | struct btf_struct_meta types[]; | |
124 | }; | |
125 | ||
60197cfb MKL |
126 | extern const struct file_operations btf_fops; |
127 | ||
22dc4a0f | 128 | void btf_get(struct btf *btf); |
f56a653c | 129 | void btf_put(struct btf *btf); |
47a71c1f | 130 | int btf_new_fd(const union bpf_attr *attr, bpfptr_t uattr, u32 uattr_sz); |
f56a653c | 131 | struct btf *btf_get_by_fd(int fd); |
60197cfb MKL |
132 | int btf_get_info_by_fd(const struct btf *btf, |
133 | const union bpf_attr *attr, | |
134 | union bpf_attr __user *uattr); | |
eb3f595d MKL |
135 | /* Figure out the size of a type_id. If type_id is a modifier |
136 | * (e.g. const), it will be resolved to find out the type with size. | |
137 | * | |
138 | * For example: | |
139 | * In describing "const void *", type_id is "const" and "const" | |
140 | * refers to "void *". The return type will be "void *". | |
141 | * | |
142 | * If type_id is a simple "int", then return type will be "int". | |
143 | * | |
144 | * @btf: struct btf object | |
145 | * @type_id: Find out the size of type_id. The type_id of the return | |
146 | * type is set to *type_id. | |
147 | * @ret_size: It can be NULL. If not NULL, the size of the return | |
148 | * type is set to *ret_size. | |
149 | * Return: The btf_type (resolved to another type with size info if needed). | |
150 | * NULL is returned if type_id itself does not have size info | |
151 | * (e.g. void) or it cannot be resolved to another type that | |
152 | * has size info. | |
153 | * *type_id and *ret_size will not be changed in the | |
154 | * NULL return case. | |
155 | */ | |
156 | const struct btf_type *btf_type_id_size(const struct btf *btf, | |
157 | u32 *type_id, | |
158 | u32 *ret_size); | |
31d0bc81 AM |
159 | |
160 | /* | |
161 | * Options to control show behaviour. | |
162 | * - BTF_SHOW_COMPACT: no formatting around type information | |
163 | * - BTF_SHOW_NONAME: no struct/union member names/types | |
164 | * - BTF_SHOW_PTR_RAW: show raw (unobfuscated) pointer values; | |
165 | * equivalent to %px. | |
166 | * - BTF_SHOW_ZERO: show zero-valued struct/union members; they | |
167 | * are not displayed by default | |
168 | * - BTF_SHOW_UNSAFE: skip use of bpf_probe_read() to safely read | |
169 | * data before displaying it. | |
170 | */ | |
c4d0bfb4 AM |
171 | #define BTF_SHOW_COMPACT BTF_F_COMPACT |
172 | #define BTF_SHOW_NONAME BTF_F_NONAME | |
173 | #define BTF_SHOW_PTR_RAW BTF_F_PTR_RAW | |
174 | #define BTF_SHOW_ZERO BTF_F_ZERO | |
31d0bc81 AM |
175 | #define BTF_SHOW_UNSAFE (1ULL << 4) |
176 | ||
b00b8dae MKL |
177 | void btf_type_seq_show(const struct btf *btf, u32 type_id, void *obj, |
178 | struct seq_file *m); | |
eb411377 AM |
179 | int btf_type_seq_show_flags(const struct btf *btf, u32 type_id, void *obj, |
180 | struct seq_file *m, u64 flags); | |
31d0bc81 AM |
181 | |
182 | /* | |
183 | * Copy len bytes of string representation of obj of BTF type_id into buf. | |
184 | * | |
185 | * @btf: struct btf object | |
186 | * @type_id: type id of type obj points to | |
187 | * @obj: pointer to typed data | |
188 | * @buf: buffer to write to | |
189 | * @len: maximum length to write to buf | |
190 | * @flags: show options (see above) | |
191 | * | |
192 | * Return: length that would have been/was copied as per snprintf, or | |
193 | * negative error. | |
194 | */ | |
195 | int btf_type_snprintf_show(const struct btf *btf, u32 type_id, void *obj, | |
196 | char *buf, int len, u64 flags); | |
197 | ||
78958fca | 198 | int btf_get_fd_by_id(u32 id); |
22dc4a0f | 199 | u32 btf_obj_id(const struct btf *btf); |
290248a5 | 200 | bool btf_is_kernel(const struct btf *btf); |
541c3bad AN |
201 | bool btf_is_module(const struct btf *btf); |
202 | struct module *btf_try_get_module(const struct btf *btf); | |
203 | u32 btf_nr_types(const struct btf *btf); | |
ffa0c1cf YS |
204 | bool btf_member_is_reg_int(const struct btf *btf, const struct btf_type *s, |
205 | const struct btf_member *m, | |
206 | u32 expected_offset, u32 expected_size); | |
d83525ca | 207 | int btf_find_spin_lock(const struct btf *btf, const struct btf_type *t); |
68134668 | 208 | int btf_find_timer(const struct btf *btf, const struct btf_type *t); |
db559117 KKD |
209 | struct btf_record *btf_parse_fields(const struct btf *btf, const struct btf_type *t, |
210 | u32 field_mask, u32 value_size); | |
865ce09a | 211 | int btf_check_and_fixup_fields(const struct btf *btf, struct btf_record *rec); |
2824ecb7 | 212 | bool btf_type_is_void(const struct btf_type *t); |
27ae7997 MKL |
213 | s32 btf_find_by_name_kind(const struct btf *btf, const char *name, u8 kind); |
214 | const struct btf_type *btf_type_skip_modifiers(const struct btf *btf, | |
215 | u32 id, u32 *res_id); | |
216 | const struct btf_type *btf_type_resolve_ptr(const struct btf *btf, | |
217 | u32 id, u32 *res_id); | |
218 | const struct btf_type *btf_type_resolve_func_ptr(const struct btf *btf, | |
219 | u32 id, u32 *res_id); | |
85d33df3 MKL |
220 | const struct btf_type * |
221 | btf_resolve_size(const struct btf *btf, const struct btf_type *type, | |
6298399b | 222 | u32 *type_size); |
e6ac2450 | 223 | const char *btf_type_str(const struct btf_type *t); |
27ae7997 MKL |
224 | |
225 | #define for_each_member(i, struct_type, member) \ | |
226 | for (i = 0, member = btf_type_member(struct_type); \ | |
227 | i < btf_type_vlen(struct_type); \ | |
228 | i++, member++) | |
f6161a8f | 229 | |
eaa6bcb7 HL |
230 | #define for_each_vsi(i, datasec_type, member) \ |
231 | for (i = 0, member = btf_type_var_secinfo(datasec_type); \ | |
232 | i < btf_type_vlen(datasec_type); \ | |
233 | i++, member++) | |
234 | ||
38207291 MKL |
235 | static inline bool btf_type_is_ptr(const struct btf_type *t) |
236 | { | |
237 | return BTF_INFO_KIND(t->info) == BTF_KIND_PTR; | |
238 | } | |
239 | ||
240 | static inline bool btf_type_is_int(const struct btf_type *t) | |
241 | { | |
242 | return BTF_INFO_KIND(t->info) == BTF_KIND_INT; | |
243 | } | |
244 | ||
a9b59159 JF |
245 | static inline bool btf_type_is_small_int(const struct btf_type *t) |
246 | { | |
247 | return btf_type_is_int(t) && t->size <= sizeof(u64); | |
248 | } | |
249 | ||
49f67f39 IL |
250 | static inline u8 btf_int_encoding(const struct btf_type *t) |
251 | { | |
252 | return BTF_INT_ENCODING(*(u32 *)(t + 1)); | |
253 | } | |
254 | ||
255 | static inline bool btf_type_is_signed_int(const struct btf_type *t) | |
256 | { | |
257 | return btf_type_is_int(t) && (btf_int_encoding(t) & BTF_INT_SIGNED); | |
258 | } | |
259 | ||
38207291 MKL |
260 | static inline bool btf_type_is_enum(const struct btf_type *t) |
261 | { | |
262 | return BTF_INFO_KIND(t->info) == BTF_KIND_ENUM; | |
263 | } | |
264 | ||
6089fb32 YS |
265 | static inline bool btf_is_any_enum(const struct btf_type *t) |
266 | { | |
267 | return BTF_INFO_KIND(t->info) == BTF_KIND_ENUM || | |
268 | BTF_INFO_KIND(t->info) == BTF_KIND_ENUM64; | |
269 | } | |
270 | ||
271 | static inline bool btf_kind_core_compat(const struct btf_type *t1, | |
272 | const struct btf_type *t2) | |
273 | { | |
274 | return BTF_INFO_KIND(t1->info) == BTF_INFO_KIND(t2->info) || | |
275 | (btf_is_any_enum(t1) && btf_is_any_enum(t2)); | |
276 | } | |
277 | ||
29db4bea AS |
278 | static inline bool str_is_empty(const char *s) |
279 | { | |
280 | return !s || !s[0]; | |
281 | } | |
282 | ||
283 | static inline u16 btf_kind(const struct btf_type *t) | |
284 | { | |
285 | return BTF_INFO_KIND(t->info); | |
286 | } | |
287 | ||
288 | static inline bool btf_is_enum(const struct btf_type *t) | |
289 | { | |
290 | return btf_kind(t) == BTF_KIND_ENUM; | |
291 | } | |
292 | ||
6089fb32 YS |
293 | static inline bool btf_is_enum64(const struct btf_type *t) |
294 | { | |
295 | return btf_kind(t) == BTF_KIND_ENUM64; | |
296 | } | |
297 | ||
298 | static inline u64 btf_enum64_value(const struct btf_enum64 *e) | |
299 | { | |
300 | return ((u64)e->val_hi32 << 32) | e->val_lo32; | |
301 | } | |
302 | ||
29db4bea AS |
303 | static inline bool btf_is_composite(const struct btf_type *t) |
304 | { | |
305 | u16 kind = btf_kind(t); | |
306 | ||
307 | return kind == BTF_KIND_STRUCT || kind == BTF_KIND_UNION; | |
308 | } | |
309 | ||
310 | static inline bool btf_is_array(const struct btf_type *t) | |
311 | { | |
312 | return btf_kind(t) == BTF_KIND_ARRAY; | |
313 | } | |
314 | ||
315 | static inline bool btf_is_int(const struct btf_type *t) | |
316 | { | |
317 | return btf_kind(t) == BTF_KIND_INT; | |
318 | } | |
319 | ||
320 | static inline bool btf_is_ptr(const struct btf_type *t) | |
321 | { | |
322 | return btf_kind(t) == BTF_KIND_PTR; | |
323 | } | |
324 | ||
325 | static inline u8 btf_int_offset(const struct btf_type *t) | |
326 | { | |
327 | return BTF_INT_OFFSET(*(u32 *)(t + 1)); | |
328 | } | |
329 | ||
34747c41 MKL |
330 | static inline bool btf_type_is_scalar(const struct btf_type *t) |
331 | { | |
332 | return btf_type_is_int(t) || btf_type_is_enum(t); | |
333 | } | |
334 | ||
38207291 MKL |
335 | static inline bool btf_type_is_typedef(const struct btf_type *t) |
336 | { | |
337 | return BTF_INFO_KIND(t->info) == BTF_KIND_TYPEDEF; | |
338 | } | |
339 | ||
23da464d KKD |
340 | static inline bool btf_type_is_volatile(const struct btf_type *t) |
341 | { | |
342 | return BTF_INFO_KIND(t->info) == BTF_KIND_VOLATILE; | |
343 | } | |
344 | ||
38207291 MKL |
345 | static inline bool btf_type_is_func(const struct btf_type *t) |
346 | { | |
347 | return BTF_INFO_KIND(t->info) == BTF_KIND_FUNC; | |
348 | } | |
349 | ||
350 | static inline bool btf_type_is_func_proto(const struct btf_type *t) | |
351 | { | |
352 | return BTF_INFO_KIND(t->info) == BTF_KIND_FUNC_PROTO; | |
353 | } | |
354 | ||
4976b718 HL |
355 | static inline bool btf_type_is_var(const struct btf_type *t) |
356 | { | |
357 | return BTF_INFO_KIND(t->info) == BTF_KIND_VAR; | |
358 | } | |
359 | ||
c6f1bfe8 YS |
360 | static inline bool btf_type_is_type_tag(const struct btf_type *t) |
361 | { | |
362 | return BTF_INFO_KIND(t->info) == BTF_KIND_TYPE_TAG; | |
363 | } | |
364 | ||
4976b718 HL |
365 | /* union is only a special case of struct: |
366 | * all its offsetof(member) == 0 | |
367 | */ | |
368 | static inline bool btf_type_is_struct(const struct btf_type *t) | |
369 | { | |
370 | u8 kind = BTF_INFO_KIND(t->info); | |
371 | ||
372 | return kind == BTF_KIND_STRUCT || kind == BTF_KIND_UNION; | |
373 | } | |
374 | ||
00b85860 KKD |
375 | static inline bool __btf_type_is_struct(const struct btf_type *t) |
376 | { | |
377 | return BTF_INFO_KIND(t->info) == BTF_KIND_STRUCT; | |
378 | } | |
379 | ||
380 | static inline bool btf_type_is_array(const struct btf_type *t) | |
381 | { | |
382 | return BTF_INFO_KIND(t->info) == BTF_KIND_ARRAY; | |
383 | } | |
384 | ||
27ae7997 MKL |
385 | static inline u16 btf_type_vlen(const struct btf_type *t) |
386 | { | |
387 | return BTF_INFO_VLEN(t->info); | |
388 | } | |
389 | ||
29db4bea AS |
390 | static inline u16 btf_vlen(const struct btf_type *t) |
391 | { | |
392 | return btf_type_vlen(t); | |
393 | } | |
394 | ||
be8704ff AS |
395 | static inline u16 btf_func_linkage(const struct btf_type *t) |
396 | { | |
397 | return BTF_INFO_VLEN(t->info); | |
398 | } | |
399 | ||
27ae7997 MKL |
400 | static inline bool btf_type_kflag(const struct btf_type *t) |
401 | { | |
402 | return BTF_INFO_KFLAG(t->info); | |
403 | } | |
404 | ||
8293eb99 AS |
405 | static inline u32 __btf_member_bit_offset(const struct btf_type *struct_type, |
406 | const struct btf_member *member) | |
85d33df3 MKL |
407 | { |
408 | return btf_type_kflag(struct_type) ? BTF_MEMBER_BIT_OFFSET(member->offset) | |
409 | : member->offset; | |
410 | } | |
411 | ||
8293eb99 AS |
412 | static inline u32 __btf_member_bitfield_size(const struct btf_type *struct_type, |
413 | const struct btf_member *member) | |
27ae7997 MKL |
414 | { |
415 | return btf_type_kflag(struct_type) ? BTF_MEMBER_BITFIELD_SIZE(member->offset) | |
416 | : 0; | |
417 | } | |
418 | ||
29db4bea AS |
419 | static inline struct btf_member *btf_members(const struct btf_type *t) |
420 | { | |
421 | return (struct btf_member *)(t + 1); | |
422 | } | |
423 | ||
424 | static inline u32 btf_member_bit_offset(const struct btf_type *t, u32 member_idx) | |
425 | { | |
426 | const struct btf_member *m = btf_members(t) + member_idx; | |
427 | ||
428 | return __btf_member_bit_offset(t, m); | |
429 | } | |
430 | ||
431 | static inline u32 btf_member_bitfield_size(const struct btf_type *t, u32 member_idx) | |
432 | { | |
433 | const struct btf_member *m = btf_members(t) + member_idx; | |
434 | ||
435 | return __btf_member_bitfield_size(t, m); | |
436 | } | |
437 | ||
27ae7997 MKL |
438 | static inline const struct btf_member *btf_type_member(const struct btf_type *t) |
439 | { | |
440 | return (const struct btf_member *)(t + 1); | |
441 | } | |
442 | ||
29db4bea AS |
443 | static inline struct btf_array *btf_array(const struct btf_type *t) |
444 | { | |
445 | return (struct btf_array *)(t + 1); | |
446 | } | |
447 | ||
448 | static inline struct btf_enum *btf_enum(const struct btf_type *t) | |
449 | { | |
450 | return (struct btf_enum *)(t + 1); | |
451 | } | |
452 | ||
6089fb32 YS |
453 | static inline struct btf_enum64 *btf_enum64(const struct btf_type *t) |
454 | { | |
455 | return (struct btf_enum64 *)(t + 1); | |
456 | } | |
457 | ||
eaa6bcb7 HL |
458 | static inline const struct btf_var_secinfo *btf_type_var_secinfo( |
459 | const struct btf_type *t) | |
460 | { | |
461 | return (const struct btf_var_secinfo *)(t + 1); | |
462 | } | |
463 | ||
e70e13e7 MC |
464 | static inline struct btf_param *btf_params(const struct btf_type *t) |
465 | { | |
466 | return (struct btf_param *)(t + 1); | |
467 | } | |
468 | ||
8ffa5cc1 KKD |
469 | static inline int btf_id_cmp_func(const void *a, const void *b) |
470 | { | |
471 | const int *pa = a, *pb = b; | |
472 | ||
473 | return *pa - *pb; | |
474 | } | |
475 | ||
476 | static inline bool btf_id_set_contains(const struct btf_id_set *set, u32 id) | |
477 | { | |
478 | return bsearch(&id, set->ids, set->cnt, sizeof(u32), btf_id_cmp_func) != NULL; | |
479 | } | |
480 | ||
481 | static inline void *btf_id_set8_contains(const struct btf_id_set8 *set, u32 id) | |
482 | { | |
483 | return bsearch(&id, set->pairs, set->cnt, sizeof(set->pairs[0]), btf_id_cmp_func); | |
484 | } | |
485 | ||
00b85860 | 486 | struct bpf_verifier_log; |
22dc4a0f | 487 | |
00b85860 | 488 | #ifdef CONFIG_BPF_SYSCALL |
838e9690 YS |
489 | const struct btf_type *btf_type_by_id(const struct btf *btf, u32 type_id); |
490 | const char *btf_name_by_offset(const struct btf *btf, u32 offset); | |
8580ac94 | 491 | struct btf *btf_parse_vmlinux(void); |
5b92a28a | 492 | struct btf *bpf_prog_get_target_btf(const struct bpf_prog *prog); |
e924e80e AG |
493 | u32 *btf_kfunc_id_set_contains(const struct btf *btf, u32 kfunc_btf_id, |
494 | const struct bpf_prog *prog); | |
495 | u32 *btf_kfunc_is_modify_return(const struct btf *btf, u32 kfunc_btf_id, | |
496 | const struct bpf_prog *prog); | |
dee872e1 KKD |
497 | int register_btf_kfunc_id_set(enum bpf_prog_type prog_type, |
498 | const struct btf_kfunc_id_set *s); | |
5b481aca | 499 | int register_btf_fmodret_id_set(const struct btf_kfunc_id_set *kset); |
5ce937d6 KKD |
500 | s32 btf_find_dtor_kfunc(struct btf *btf, u32 btf_id); |
501 | int register_btf_id_dtor_kfuncs(const struct btf_id_dtor_kfunc *dtors, u32 add_cnt, | |
502 | struct module *owner); | |
8ffa5cc1 | 503 | struct btf_struct_meta *btf_find_struct_meta(const struct btf *btf, u32 btf_id); |
00b85860 KKD |
504 | const struct btf_member * |
505 | btf_get_prog_ctx_type(struct bpf_verifier_log *log, const struct btf *btf, | |
506 | const struct btf_type *t, enum bpf_prog_type prog_type, | |
507 | int arg); | |
fd264ca0 | 508 | int get_kern_ctx_btf_id(struct bpf_verifier_log *log, enum bpf_prog_type prog_type); |
00b85860 KKD |
509 | bool btf_types_are_same(const struct btf *btf1, u32 id1, |
510 | const struct btf *btf2, u32 id2); | |
f6161a8f YS |
511 | #else |
512 | static inline const struct btf_type *btf_type_by_id(const struct btf *btf, | |
513 | u32 type_id) | |
514 | { | |
515 | return NULL; | |
516 | } | |
517 | static inline const char *btf_name_by_offset(const struct btf *btf, | |
518 | u32 offset) | |
519 | { | |
520 | return NULL; | |
521 | } | |
a4703e31 | 522 | static inline u32 *btf_kfunc_id_set_contains(const struct btf *btf, |
e924e80e AG |
523 | u32 kfunc_btf_id, |
524 | struct bpf_prog *prog) | |
525 | ||
dee872e1 | 526 | { |
a4703e31 | 527 | return NULL; |
dee872e1 KKD |
528 | } |
529 | static inline int register_btf_kfunc_id_set(enum bpf_prog_type prog_type, | |
530 | const struct btf_kfunc_id_set *s) | |
531 | { | |
532 | return 0; | |
533 | } | |
5ce937d6 KKD |
534 | static inline s32 btf_find_dtor_kfunc(struct btf *btf, u32 btf_id) |
535 | { | |
536 | return -ENOENT; | |
537 | } | |
538 | static inline int register_btf_id_dtor_kfuncs(const struct btf_id_dtor_kfunc *dtors, | |
539 | u32 add_cnt, struct module *owner) | |
540 | { | |
541 | return 0; | |
542 | } | |
8ffa5cc1 KKD |
543 | static inline struct btf_struct_meta *btf_find_struct_meta(const struct btf *btf, u32 btf_id) |
544 | { | |
545 | return NULL; | |
546 | } | |
00b85860 KKD |
547 | static inline const struct btf_member * |
548 | btf_get_prog_ctx_type(struct bpf_verifier_log *log, const struct btf *btf, | |
549 | const struct btf_type *t, enum bpf_prog_type prog_type, | |
550 | int arg) | |
551 | { | |
552 | return NULL; | |
553 | } | |
fd264ca0 YS |
554 | static inline int get_kern_ctx_btf_id(struct bpf_verifier_log *log, |
555 | enum bpf_prog_type prog_type) { | |
556 | return -EINVAL; | |
557 | } | |
00b85860 KKD |
558 | static inline bool btf_types_are_same(const struct btf *btf1, u32 id1, |
559 | const struct btf *btf2, u32 id2) | |
560 | { | |
561 | return false; | |
562 | } | |
f6161a8f | 563 | #endif |
eb3f595d | 564 | |
eb1f7f71 BT |
565 | static inline bool btf_type_is_struct_ptr(struct btf *btf, const struct btf_type *t) |
566 | { | |
567 | if (!btf_type_is_ptr(t)) | |
568 | return false; | |
569 | ||
570 | t = btf_type_skip_modifiers(btf, t->type, NULL); | |
571 | ||
572 | return btf_type_is_struct(t); | |
573 | } | |
574 | ||
eb3f595d | 575 | #endif |