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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 KKD |
100 | struct btf_id_set; |
101 | ||
102 | struct btf_kfunc_id_set { | |
103 | struct module *owner; | |
a4703e31 | 104 | struct btf_id_set8 *set; |
dee872e1 | 105 | }; |
eb3f595d | 106 | |
5ce937d6 KKD |
107 | struct btf_id_dtor_kfunc { |
108 | u32 btf_id; | |
109 | u32 kfunc_btf_id; | |
110 | }; | |
111 | ||
8ffa5cc1 KKD |
112 | struct btf_struct_meta { |
113 | u32 btf_id; | |
114 | struct btf_record *record; | |
8ffa5cc1 KKD |
115 | }; |
116 | ||
117 | struct btf_struct_metas { | |
118 | u32 cnt; | |
119 | struct btf_struct_meta types[]; | |
120 | }; | |
121 | ||
60197cfb MKL |
122 | extern const struct file_operations btf_fops; |
123 | ||
22dc4a0f | 124 | void btf_get(struct btf *btf); |
f56a653c | 125 | void btf_put(struct btf *btf); |
47a71c1f | 126 | int btf_new_fd(const union bpf_attr *attr, bpfptr_t uattr, u32 uattr_sz); |
f56a653c | 127 | struct btf *btf_get_by_fd(int fd); |
60197cfb MKL |
128 | int btf_get_info_by_fd(const struct btf *btf, |
129 | const union bpf_attr *attr, | |
130 | union bpf_attr __user *uattr); | |
eb3f595d MKL |
131 | /* Figure out the size of a type_id. If type_id is a modifier |
132 | * (e.g. const), it will be resolved to find out the type with size. | |
133 | * | |
134 | * For example: | |
135 | * In describing "const void *", type_id is "const" and "const" | |
136 | * refers to "void *". The return type will be "void *". | |
137 | * | |
138 | * If type_id is a simple "int", then return type will be "int". | |
139 | * | |
140 | * @btf: struct btf object | |
141 | * @type_id: Find out the size of type_id. The type_id of the return | |
142 | * type is set to *type_id. | |
143 | * @ret_size: It can be NULL. If not NULL, the size of the return | |
144 | * type is set to *ret_size. | |
145 | * Return: The btf_type (resolved to another type with size info if needed). | |
146 | * NULL is returned if type_id itself does not have size info | |
147 | * (e.g. void) or it cannot be resolved to another type that | |
148 | * has size info. | |
149 | * *type_id and *ret_size will not be changed in the | |
150 | * NULL return case. | |
151 | */ | |
152 | const struct btf_type *btf_type_id_size(const struct btf *btf, | |
153 | u32 *type_id, | |
154 | u32 *ret_size); | |
31d0bc81 AM |
155 | |
156 | /* | |
157 | * Options to control show behaviour. | |
158 | * - BTF_SHOW_COMPACT: no formatting around type information | |
159 | * - BTF_SHOW_NONAME: no struct/union member names/types | |
160 | * - BTF_SHOW_PTR_RAW: show raw (unobfuscated) pointer values; | |
161 | * equivalent to %px. | |
162 | * - BTF_SHOW_ZERO: show zero-valued struct/union members; they | |
163 | * are not displayed by default | |
164 | * - BTF_SHOW_UNSAFE: skip use of bpf_probe_read() to safely read | |
165 | * data before displaying it. | |
166 | */ | |
c4d0bfb4 AM |
167 | #define BTF_SHOW_COMPACT BTF_F_COMPACT |
168 | #define BTF_SHOW_NONAME BTF_F_NONAME | |
169 | #define BTF_SHOW_PTR_RAW BTF_F_PTR_RAW | |
170 | #define BTF_SHOW_ZERO BTF_F_ZERO | |
31d0bc81 AM |
171 | #define BTF_SHOW_UNSAFE (1ULL << 4) |
172 | ||
b00b8dae MKL |
173 | void btf_type_seq_show(const struct btf *btf, u32 type_id, void *obj, |
174 | struct seq_file *m); | |
eb411377 AM |
175 | int btf_type_seq_show_flags(const struct btf *btf, u32 type_id, void *obj, |
176 | struct seq_file *m, u64 flags); | |
31d0bc81 AM |
177 | |
178 | /* | |
179 | * Copy len bytes of string representation of obj of BTF type_id into buf. | |
180 | * | |
181 | * @btf: struct btf object | |
182 | * @type_id: type id of type obj points to | |
183 | * @obj: pointer to typed data | |
184 | * @buf: buffer to write to | |
185 | * @len: maximum length to write to buf | |
186 | * @flags: show options (see above) | |
187 | * | |
188 | * Return: length that would have been/was copied as per snprintf, or | |
189 | * negative error. | |
190 | */ | |
191 | int btf_type_snprintf_show(const struct btf *btf, u32 type_id, void *obj, | |
192 | char *buf, int len, u64 flags); | |
193 | ||
78958fca | 194 | int btf_get_fd_by_id(u32 id); |
22dc4a0f | 195 | u32 btf_obj_id(const struct btf *btf); |
290248a5 | 196 | bool btf_is_kernel(const struct btf *btf); |
541c3bad AN |
197 | bool btf_is_module(const struct btf *btf); |
198 | struct module *btf_try_get_module(const struct btf *btf); | |
199 | u32 btf_nr_types(const struct btf *btf); | |
ffa0c1cf YS |
200 | bool btf_member_is_reg_int(const struct btf *btf, const struct btf_type *s, |
201 | const struct btf_member *m, | |
202 | u32 expected_offset, u32 expected_size); | |
d83525ca | 203 | int btf_find_spin_lock(const struct btf *btf, const struct btf_type *t); |
68134668 | 204 | int btf_find_timer(const struct btf *btf, const struct btf_type *t); |
db559117 KKD |
205 | struct btf_record *btf_parse_fields(const struct btf *btf, const struct btf_type *t, |
206 | u32 field_mask, u32 value_size); | |
865ce09a | 207 | int btf_check_and_fixup_fields(const struct btf *btf, struct btf_record *rec); |
2824ecb7 | 208 | bool btf_type_is_void(const struct btf_type *t); |
27ae7997 MKL |
209 | s32 btf_find_by_name_kind(const struct btf *btf, const char *name, u8 kind); |
210 | const struct btf_type *btf_type_skip_modifiers(const struct btf *btf, | |
211 | u32 id, u32 *res_id); | |
212 | const struct btf_type *btf_type_resolve_ptr(const struct btf *btf, | |
213 | u32 id, u32 *res_id); | |
214 | const struct btf_type *btf_type_resolve_func_ptr(const struct btf *btf, | |
215 | u32 id, u32 *res_id); | |
85d33df3 MKL |
216 | const struct btf_type * |
217 | btf_resolve_size(const struct btf *btf, const struct btf_type *type, | |
6298399b | 218 | u32 *type_size); |
e6ac2450 | 219 | const char *btf_type_str(const struct btf_type *t); |
27ae7997 MKL |
220 | |
221 | #define for_each_member(i, struct_type, member) \ | |
222 | for (i = 0, member = btf_type_member(struct_type); \ | |
223 | i < btf_type_vlen(struct_type); \ | |
224 | i++, member++) | |
f6161a8f | 225 | |
eaa6bcb7 HL |
226 | #define for_each_vsi(i, datasec_type, member) \ |
227 | for (i = 0, member = btf_type_var_secinfo(datasec_type); \ | |
228 | i < btf_type_vlen(datasec_type); \ | |
229 | i++, member++) | |
230 | ||
38207291 MKL |
231 | static inline bool btf_type_is_ptr(const struct btf_type *t) |
232 | { | |
233 | return BTF_INFO_KIND(t->info) == BTF_KIND_PTR; | |
234 | } | |
235 | ||
236 | static inline bool btf_type_is_int(const struct btf_type *t) | |
237 | { | |
238 | return BTF_INFO_KIND(t->info) == BTF_KIND_INT; | |
239 | } | |
240 | ||
a9b59159 JF |
241 | static inline bool btf_type_is_small_int(const struct btf_type *t) |
242 | { | |
243 | return btf_type_is_int(t) && t->size <= sizeof(u64); | |
244 | } | |
245 | ||
49f67f39 IL |
246 | static inline u8 btf_int_encoding(const struct btf_type *t) |
247 | { | |
248 | return BTF_INT_ENCODING(*(u32 *)(t + 1)); | |
249 | } | |
250 | ||
251 | static inline bool btf_type_is_signed_int(const struct btf_type *t) | |
252 | { | |
253 | return btf_type_is_int(t) && (btf_int_encoding(t) & BTF_INT_SIGNED); | |
254 | } | |
255 | ||
38207291 MKL |
256 | static inline bool btf_type_is_enum(const struct btf_type *t) |
257 | { | |
258 | return BTF_INFO_KIND(t->info) == BTF_KIND_ENUM; | |
259 | } | |
260 | ||
6089fb32 YS |
261 | static inline bool btf_is_any_enum(const struct btf_type *t) |
262 | { | |
263 | return BTF_INFO_KIND(t->info) == BTF_KIND_ENUM || | |
264 | BTF_INFO_KIND(t->info) == BTF_KIND_ENUM64; | |
265 | } | |
266 | ||
267 | static inline bool btf_kind_core_compat(const struct btf_type *t1, | |
268 | const struct btf_type *t2) | |
269 | { | |
270 | return BTF_INFO_KIND(t1->info) == BTF_INFO_KIND(t2->info) || | |
271 | (btf_is_any_enum(t1) && btf_is_any_enum(t2)); | |
272 | } | |
273 | ||
29db4bea AS |
274 | static inline bool str_is_empty(const char *s) |
275 | { | |
276 | return !s || !s[0]; | |
277 | } | |
278 | ||
279 | static inline u16 btf_kind(const struct btf_type *t) | |
280 | { | |
281 | return BTF_INFO_KIND(t->info); | |
282 | } | |
283 | ||
284 | static inline bool btf_is_enum(const struct btf_type *t) | |
285 | { | |
286 | return btf_kind(t) == BTF_KIND_ENUM; | |
287 | } | |
288 | ||
6089fb32 YS |
289 | static inline bool btf_is_enum64(const struct btf_type *t) |
290 | { | |
291 | return btf_kind(t) == BTF_KIND_ENUM64; | |
292 | } | |
293 | ||
294 | static inline u64 btf_enum64_value(const struct btf_enum64 *e) | |
295 | { | |
296 | return ((u64)e->val_hi32 << 32) | e->val_lo32; | |
297 | } | |
298 | ||
29db4bea AS |
299 | static inline bool btf_is_composite(const struct btf_type *t) |
300 | { | |
301 | u16 kind = btf_kind(t); | |
302 | ||
303 | return kind == BTF_KIND_STRUCT || kind == BTF_KIND_UNION; | |
304 | } | |
305 | ||
306 | static inline bool btf_is_array(const struct btf_type *t) | |
307 | { | |
308 | return btf_kind(t) == BTF_KIND_ARRAY; | |
309 | } | |
310 | ||
311 | static inline bool btf_is_int(const struct btf_type *t) | |
312 | { | |
313 | return btf_kind(t) == BTF_KIND_INT; | |
314 | } | |
315 | ||
316 | static inline bool btf_is_ptr(const struct btf_type *t) | |
317 | { | |
318 | return btf_kind(t) == BTF_KIND_PTR; | |
319 | } | |
320 | ||
321 | static inline u8 btf_int_offset(const struct btf_type *t) | |
322 | { | |
323 | return BTF_INT_OFFSET(*(u32 *)(t + 1)); | |
324 | } | |
325 | ||
34747c41 MKL |
326 | static inline bool btf_type_is_scalar(const struct btf_type *t) |
327 | { | |
328 | return btf_type_is_int(t) || btf_type_is_enum(t); | |
329 | } | |
330 | ||
38207291 MKL |
331 | static inline bool btf_type_is_typedef(const struct btf_type *t) |
332 | { | |
333 | return BTF_INFO_KIND(t->info) == BTF_KIND_TYPEDEF; | |
334 | } | |
335 | ||
23da464d KKD |
336 | static inline bool btf_type_is_volatile(const struct btf_type *t) |
337 | { | |
338 | return BTF_INFO_KIND(t->info) == BTF_KIND_VOLATILE; | |
339 | } | |
340 | ||
38207291 MKL |
341 | static inline bool btf_type_is_func(const struct btf_type *t) |
342 | { | |
343 | return BTF_INFO_KIND(t->info) == BTF_KIND_FUNC; | |
344 | } | |
345 | ||
346 | static inline bool btf_type_is_func_proto(const struct btf_type *t) | |
347 | { | |
348 | return BTF_INFO_KIND(t->info) == BTF_KIND_FUNC_PROTO; | |
349 | } | |
350 | ||
4976b718 HL |
351 | static inline bool btf_type_is_var(const struct btf_type *t) |
352 | { | |
353 | return BTF_INFO_KIND(t->info) == BTF_KIND_VAR; | |
354 | } | |
355 | ||
c6f1bfe8 YS |
356 | static inline bool btf_type_is_type_tag(const struct btf_type *t) |
357 | { | |
358 | return BTF_INFO_KIND(t->info) == BTF_KIND_TYPE_TAG; | |
359 | } | |
360 | ||
4976b718 HL |
361 | /* union is only a special case of struct: |
362 | * all its offsetof(member) == 0 | |
363 | */ | |
364 | static inline bool btf_type_is_struct(const struct btf_type *t) | |
365 | { | |
366 | u8 kind = BTF_INFO_KIND(t->info); | |
367 | ||
368 | return kind == BTF_KIND_STRUCT || kind == BTF_KIND_UNION; | |
369 | } | |
370 | ||
00b85860 KKD |
371 | static inline bool __btf_type_is_struct(const struct btf_type *t) |
372 | { | |
373 | return BTF_INFO_KIND(t->info) == BTF_KIND_STRUCT; | |
374 | } | |
375 | ||
376 | static inline bool btf_type_is_array(const struct btf_type *t) | |
377 | { | |
378 | return BTF_INFO_KIND(t->info) == BTF_KIND_ARRAY; | |
379 | } | |
380 | ||
27ae7997 MKL |
381 | static inline u16 btf_type_vlen(const struct btf_type *t) |
382 | { | |
383 | return BTF_INFO_VLEN(t->info); | |
384 | } | |
385 | ||
29db4bea AS |
386 | static inline u16 btf_vlen(const struct btf_type *t) |
387 | { | |
388 | return btf_type_vlen(t); | |
389 | } | |
390 | ||
be8704ff AS |
391 | static inline u16 btf_func_linkage(const struct btf_type *t) |
392 | { | |
393 | return BTF_INFO_VLEN(t->info); | |
394 | } | |
395 | ||
27ae7997 MKL |
396 | static inline bool btf_type_kflag(const struct btf_type *t) |
397 | { | |
398 | return BTF_INFO_KFLAG(t->info); | |
399 | } | |
400 | ||
8293eb99 AS |
401 | static inline u32 __btf_member_bit_offset(const struct btf_type *struct_type, |
402 | const struct btf_member *member) | |
85d33df3 MKL |
403 | { |
404 | return btf_type_kflag(struct_type) ? BTF_MEMBER_BIT_OFFSET(member->offset) | |
405 | : member->offset; | |
406 | } | |
407 | ||
8293eb99 AS |
408 | static inline u32 __btf_member_bitfield_size(const struct btf_type *struct_type, |
409 | const struct btf_member *member) | |
27ae7997 MKL |
410 | { |
411 | return btf_type_kflag(struct_type) ? BTF_MEMBER_BITFIELD_SIZE(member->offset) | |
412 | : 0; | |
413 | } | |
414 | ||
29db4bea AS |
415 | static inline struct btf_member *btf_members(const struct btf_type *t) |
416 | { | |
417 | return (struct btf_member *)(t + 1); | |
418 | } | |
419 | ||
420 | static inline u32 btf_member_bit_offset(const struct btf_type *t, u32 member_idx) | |
421 | { | |
422 | const struct btf_member *m = btf_members(t) + member_idx; | |
423 | ||
424 | return __btf_member_bit_offset(t, m); | |
425 | } | |
426 | ||
427 | static inline u32 btf_member_bitfield_size(const struct btf_type *t, u32 member_idx) | |
428 | { | |
429 | const struct btf_member *m = btf_members(t) + member_idx; | |
430 | ||
431 | return __btf_member_bitfield_size(t, m); | |
432 | } | |
433 | ||
27ae7997 MKL |
434 | static inline const struct btf_member *btf_type_member(const struct btf_type *t) |
435 | { | |
436 | return (const struct btf_member *)(t + 1); | |
437 | } | |
438 | ||
29db4bea AS |
439 | static inline struct btf_array *btf_array(const struct btf_type *t) |
440 | { | |
441 | return (struct btf_array *)(t + 1); | |
442 | } | |
443 | ||
444 | static inline struct btf_enum *btf_enum(const struct btf_type *t) | |
445 | { | |
446 | return (struct btf_enum *)(t + 1); | |
447 | } | |
448 | ||
6089fb32 YS |
449 | static inline struct btf_enum64 *btf_enum64(const struct btf_type *t) |
450 | { | |
451 | return (struct btf_enum64 *)(t + 1); | |
452 | } | |
453 | ||
eaa6bcb7 HL |
454 | static inline const struct btf_var_secinfo *btf_type_var_secinfo( |
455 | const struct btf_type *t) | |
456 | { | |
457 | return (const struct btf_var_secinfo *)(t + 1); | |
458 | } | |
459 | ||
e70e13e7 MC |
460 | static inline struct btf_param *btf_params(const struct btf_type *t) |
461 | { | |
462 | return (struct btf_param *)(t + 1); | |
463 | } | |
464 | ||
8ffa5cc1 KKD |
465 | static inline int btf_id_cmp_func(const void *a, const void *b) |
466 | { | |
467 | const int *pa = a, *pb = b; | |
468 | ||
469 | return *pa - *pb; | |
470 | } | |
471 | ||
472 | static inline bool btf_id_set_contains(const struct btf_id_set *set, u32 id) | |
473 | { | |
474 | return bsearch(&id, set->ids, set->cnt, sizeof(u32), btf_id_cmp_func) != NULL; | |
475 | } | |
476 | ||
477 | static inline void *btf_id_set8_contains(const struct btf_id_set8 *set, u32 id) | |
478 | { | |
479 | return bsearch(&id, set->pairs, set->cnt, sizeof(set->pairs[0]), btf_id_cmp_func); | |
480 | } | |
481 | ||
22dc4a0f | 482 | struct bpf_prog; |
00b85860 | 483 | struct bpf_verifier_log; |
22dc4a0f | 484 | |
00b85860 | 485 | #ifdef CONFIG_BPF_SYSCALL |
838e9690 YS |
486 | const struct btf_type *btf_type_by_id(const struct btf *btf, u32 type_id); |
487 | const char *btf_name_by_offset(const struct btf *btf, u32 offset); | |
8580ac94 | 488 | struct btf *btf_parse_vmlinux(void); |
5b92a28a | 489 | struct btf *bpf_prog_get_target_btf(const struct bpf_prog *prog); |
a4703e31 | 490 | u32 *btf_kfunc_id_set_contains(const struct btf *btf, |
dee872e1 | 491 | enum bpf_prog_type prog_type, |
a4703e31 | 492 | u32 kfunc_btf_id); |
5b481aca | 493 | u32 *btf_kfunc_is_modify_return(const struct btf *btf, u32 kfunc_btf_id); |
dee872e1 KKD |
494 | int register_btf_kfunc_id_set(enum bpf_prog_type prog_type, |
495 | const struct btf_kfunc_id_set *s); | |
5b481aca | 496 | int register_btf_fmodret_id_set(const struct btf_kfunc_id_set *kset); |
5ce937d6 KKD |
497 | s32 btf_find_dtor_kfunc(struct btf *btf, u32 btf_id); |
498 | int register_btf_id_dtor_kfuncs(const struct btf_id_dtor_kfunc *dtors, u32 add_cnt, | |
499 | struct module *owner); | |
8ffa5cc1 | 500 | struct btf_struct_meta *btf_find_struct_meta(const struct btf *btf, u32 btf_id); |
00b85860 KKD |
501 | const struct btf_member * |
502 | btf_get_prog_ctx_type(struct bpf_verifier_log *log, const struct btf *btf, | |
503 | const struct btf_type *t, enum bpf_prog_type prog_type, | |
504 | int arg); | |
fd264ca0 | 505 | int get_kern_ctx_btf_id(struct bpf_verifier_log *log, enum bpf_prog_type prog_type); |
00b85860 KKD |
506 | bool btf_types_are_same(const struct btf *btf1, u32 id1, |
507 | const struct btf *btf2, u32 id2); | |
f6161a8f YS |
508 | #else |
509 | static inline const struct btf_type *btf_type_by_id(const struct btf *btf, | |
510 | u32 type_id) | |
511 | { | |
512 | return NULL; | |
513 | } | |
514 | static inline const char *btf_name_by_offset(const struct btf *btf, | |
515 | u32 offset) | |
516 | { | |
517 | return NULL; | |
518 | } | |
a4703e31 | 519 | static inline u32 *btf_kfunc_id_set_contains(const struct btf *btf, |
dee872e1 | 520 | enum bpf_prog_type prog_type, |
dee872e1 KKD |
521 | u32 kfunc_btf_id) |
522 | { | |
a4703e31 | 523 | return NULL; |
dee872e1 KKD |
524 | } |
525 | static inline int register_btf_kfunc_id_set(enum bpf_prog_type prog_type, | |
526 | const struct btf_kfunc_id_set *s) | |
527 | { | |
528 | return 0; | |
529 | } | |
5ce937d6 KKD |
530 | static inline s32 btf_find_dtor_kfunc(struct btf *btf, u32 btf_id) |
531 | { | |
532 | return -ENOENT; | |
533 | } | |
534 | static inline int register_btf_id_dtor_kfuncs(const struct btf_id_dtor_kfunc *dtors, | |
535 | u32 add_cnt, struct module *owner) | |
536 | { | |
537 | return 0; | |
538 | } | |
8ffa5cc1 KKD |
539 | static inline struct btf_struct_meta *btf_find_struct_meta(const struct btf *btf, u32 btf_id) |
540 | { | |
541 | return NULL; | |
542 | } | |
00b85860 KKD |
543 | static inline const struct btf_member * |
544 | btf_get_prog_ctx_type(struct bpf_verifier_log *log, const struct btf *btf, | |
545 | const struct btf_type *t, enum bpf_prog_type prog_type, | |
546 | int arg) | |
547 | { | |
548 | return NULL; | |
549 | } | |
fd264ca0 YS |
550 | static inline int get_kern_ctx_btf_id(struct bpf_verifier_log *log, |
551 | enum bpf_prog_type prog_type) { | |
552 | return -EINVAL; | |
553 | } | |
00b85860 KKD |
554 | static inline bool btf_types_are_same(const struct btf *btf1, u32 id1, |
555 | const struct btf *btf2, u32 id2) | |
556 | { | |
557 | return false; | |
558 | } | |
f6161a8f | 559 | #endif |
eb3f595d | 560 | |
eb1f7f71 BT |
561 | static inline bool btf_type_is_struct_ptr(struct btf *btf, const struct btf_type *t) |
562 | { | |
563 | if (!btf_type_is_ptr(t)) | |
564 | return false; | |
565 | ||
566 | t = btf_type_skip_modifiers(btf, t->type, NULL); | |
567 | ||
568 | return btf_type_is_struct(t); | |
569 | } | |
570 | ||
eb3f595d | 571 | #endif |