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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 */ | |
21 | #define KF_KPTR_GET (1 << 3) /* kfunc returns reference to a kptr */ | |
3f00c523 DV |
22 | /* Trusted arguments are those which are guaranteed to be valid when passed to |
23 | * the kfunc. It is used to enforce that pointers obtained from either acquire | |
24 | * kfuncs, or from the main kernel on a tracepoint or struct_ops callback | |
25 | * invocation, remain unmodified when being passed to helpers taking trusted | |
26 | * args. | |
27 | * | |
28 | * Consider, for example, the following new task tracepoint: | |
29 | * | |
30 | * SEC("tp_btf/task_newtask") | |
31 | * int BPF_PROG(new_task_tp, struct task_struct *task, u64 clone_flags) | |
32 | * { | |
33 | * ... | |
34 | * } | |
35 | * | |
36 | * And the following kfunc: | |
37 | * | |
38 | * BTF_ID_FLAGS(func, bpf_task_acquire, KF_ACQUIRE | KF_TRUSTED_ARGS) | |
39 | * | |
40 | * All invocations to the kfunc must pass the unmodified, unwalked task: | |
41 | * | |
42 | * bpf_task_acquire(task); // Allowed | |
43 | * bpf_task_acquire(task->last_wakee); // Rejected, walked task | |
44 | * | |
45 | * Programs may also pass referenced tasks directly to the kfunc: | |
46 | * | |
47 | * struct task_struct *acquired; | |
48 | * | |
49 | * acquired = bpf_task_acquire(task); // Allowed, same as above | |
50 | * bpf_task_acquire(acquired); // Allowed | |
51 | * bpf_task_acquire(task); // Allowed | |
52 | * bpf_task_acquire(acquired->last_wakee); // Rejected, walked task | |
53 | * | |
54 | * Programs may _not_, however, pass a task from an arbitrary fentry/fexit, or | |
55 | * kprobe/kretprobe to the kfunc, as BPF cannot guarantee that all of these | |
56 | * pointers are guaranteed to be safe. For example, the following BPF program | |
57 | * would be rejected: | |
58 | * | |
59 | * SEC("kretprobe/free_task") | |
60 | * int BPF_PROG(free_task_probe, struct task_struct *tsk) | |
61 | * { | |
62 | * struct task_struct *acquired; | |
63 | * | |
64 | * acquired = bpf_task_acquire(acquired); // Rejected, not a trusted pointer | |
65 | * bpf_task_release(acquired); | |
66 | * | |
67 | * return 0; | |
68 | * } | |
56e948ff KKD |
69 | */ |
70 | #define KF_TRUSTED_ARGS (1 << 4) /* kfunc only takes trusted pointer arguments */ | |
4dd48c6f AS |
71 | #define KF_SLEEPABLE (1 << 5) /* kfunc may sleep */ |
72 | #define KF_DESTRUCTIVE (1 << 6) /* kfunc performs destructive actions */ | |
fca1aa75 | 73 | #define KF_RCU (1 << 7) /* kfunc only takes rcu pointer arguments */ |
dee872e1 | 74 | |
b8d31762 RS |
75 | /* |
76 | * Return the name of the passed struct, if exists, or halt the build if for | |
77 | * example the structure gets renamed. In this way, developers have to revisit | |
78 | * the code using that structure name, and update it accordingly. | |
79 | */ | |
80 | #define stringify_struct(x) \ | |
81 | ({ BUILD_BUG_ON(sizeof(struct x) < 0); \ | |
82 | __stringify(x); }) | |
83 | ||
eb3f595d | 84 | struct btf; |
ffa0c1cf | 85 | struct btf_member; |
eb3f595d | 86 | struct btf_type; |
f56a653c | 87 | union bpf_attr; |
31d0bc81 | 88 | struct btf_show; |
dee872e1 KKD |
89 | struct btf_id_set; |
90 | ||
91 | struct btf_kfunc_id_set { | |
92 | struct module *owner; | |
a4703e31 | 93 | struct btf_id_set8 *set; |
dee872e1 | 94 | }; |
eb3f595d | 95 | |
5ce937d6 KKD |
96 | struct btf_id_dtor_kfunc { |
97 | u32 btf_id; | |
98 | u32 kfunc_btf_id; | |
99 | }; | |
100 | ||
8ffa5cc1 KKD |
101 | struct btf_struct_meta { |
102 | u32 btf_id; | |
103 | struct btf_record *record; | |
104 | struct btf_field_offs *field_offs; | |
105 | }; | |
106 | ||
107 | struct btf_struct_metas { | |
108 | u32 cnt; | |
109 | struct btf_struct_meta types[]; | |
110 | }; | |
111 | ||
14a324f6 KKD |
112 | typedef void (*btf_dtor_kfunc_t)(void *); |
113 | ||
60197cfb MKL |
114 | extern const struct file_operations btf_fops; |
115 | ||
22dc4a0f | 116 | void btf_get(struct btf *btf); |
f56a653c | 117 | void btf_put(struct btf *btf); |
c571bd75 | 118 | int btf_new_fd(const union bpf_attr *attr, bpfptr_t uattr); |
f56a653c | 119 | struct btf *btf_get_by_fd(int fd); |
60197cfb MKL |
120 | int btf_get_info_by_fd(const struct btf *btf, |
121 | const union bpf_attr *attr, | |
122 | union bpf_attr __user *uattr); | |
eb3f595d MKL |
123 | /* Figure out the size of a type_id. If type_id is a modifier |
124 | * (e.g. const), it will be resolved to find out the type with size. | |
125 | * | |
126 | * For example: | |
127 | * In describing "const void *", type_id is "const" and "const" | |
128 | * refers to "void *". The return type will be "void *". | |
129 | * | |
130 | * If type_id is a simple "int", then return type will be "int". | |
131 | * | |
132 | * @btf: struct btf object | |
133 | * @type_id: Find out the size of type_id. The type_id of the return | |
134 | * type is set to *type_id. | |
135 | * @ret_size: It can be NULL. If not NULL, the size of the return | |
136 | * type is set to *ret_size. | |
137 | * Return: The btf_type (resolved to another type with size info if needed). | |
138 | * NULL is returned if type_id itself does not have size info | |
139 | * (e.g. void) or it cannot be resolved to another type that | |
140 | * has size info. | |
141 | * *type_id and *ret_size will not be changed in the | |
142 | * NULL return case. | |
143 | */ | |
144 | const struct btf_type *btf_type_id_size(const struct btf *btf, | |
145 | u32 *type_id, | |
146 | u32 *ret_size); | |
31d0bc81 AM |
147 | |
148 | /* | |
149 | * Options to control show behaviour. | |
150 | * - BTF_SHOW_COMPACT: no formatting around type information | |
151 | * - BTF_SHOW_NONAME: no struct/union member names/types | |
152 | * - BTF_SHOW_PTR_RAW: show raw (unobfuscated) pointer values; | |
153 | * equivalent to %px. | |
154 | * - BTF_SHOW_ZERO: show zero-valued struct/union members; they | |
155 | * are not displayed by default | |
156 | * - BTF_SHOW_UNSAFE: skip use of bpf_probe_read() to safely read | |
157 | * data before displaying it. | |
158 | */ | |
c4d0bfb4 AM |
159 | #define BTF_SHOW_COMPACT BTF_F_COMPACT |
160 | #define BTF_SHOW_NONAME BTF_F_NONAME | |
161 | #define BTF_SHOW_PTR_RAW BTF_F_PTR_RAW | |
162 | #define BTF_SHOW_ZERO BTF_F_ZERO | |
31d0bc81 AM |
163 | #define BTF_SHOW_UNSAFE (1ULL << 4) |
164 | ||
b00b8dae MKL |
165 | void btf_type_seq_show(const struct btf *btf, u32 type_id, void *obj, |
166 | struct seq_file *m); | |
eb411377 AM |
167 | int btf_type_seq_show_flags(const struct btf *btf, u32 type_id, void *obj, |
168 | struct seq_file *m, u64 flags); | |
31d0bc81 AM |
169 | |
170 | /* | |
171 | * Copy len bytes of string representation of obj of BTF type_id into buf. | |
172 | * | |
173 | * @btf: struct btf object | |
174 | * @type_id: type id of type obj points to | |
175 | * @obj: pointer to typed data | |
176 | * @buf: buffer to write to | |
177 | * @len: maximum length to write to buf | |
178 | * @flags: show options (see above) | |
179 | * | |
180 | * Return: length that would have been/was copied as per snprintf, or | |
181 | * negative error. | |
182 | */ | |
183 | int btf_type_snprintf_show(const struct btf *btf, u32 type_id, void *obj, | |
184 | char *buf, int len, u64 flags); | |
185 | ||
78958fca | 186 | int btf_get_fd_by_id(u32 id); |
22dc4a0f | 187 | u32 btf_obj_id(const struct btf *btf); |
290248a5 | 188 | bool btf_is_kernel(const struct btf *btf); |
541c3bad AN |
189 | bool btf_is_module(const struct btf *btf); |
190 | struct module *btf_try_get_module(const struct btf *btf); | |
191 | u32 btf_nr_types(const struct btf *btf); | |
ffa0c1cf YS |
192 | bool btf_member_is_reg_int(const struct btf *btf, const struct btf_type *s, |
193 | const struct btf_member *m, | |
194 | u32 expected_offset, u32 expected_size); | |
d83525ca | 195 | int btf_find_spin_lock(const struct btf *btf, const struct btf_type *t); |
68134668 | 196 | int btf_find_timer(const struct btf *btf, const struct btf_type *t); |
db559117 KKD |
197 | struct btf_record *btf_parse_fields(const struct btf *btf, const struct btf_type *t, |
198 | u32 field_mask, u32 value_size); | |
865ce09a | 199 | int btf_check_and_fixup_fields(const struct btf *btf, struct btf_record *rec); |
f71b2f64 | 200 | struct btf_field_offs *btf_parse_field_offs(struct btf_record *rec); |
2824ecb7 | 201 | bool btf_type_is_void(const struct btf_type *t); |
27ae7997 MKL |
202 | s32 btf_find_by_name_kind(const struct btf *btf, const char *name, u8 kind); |
203 | const struct btf_type *btf_type_skip_modifiers(const struct btf *btf, | |
204 | u32 id, u32 *res_id); | |
205 | const struct btf_type *btf_type_resolve_ptr(const struct btf *btf, | |
206 | u32 id, u32 *res_id); | |
207 | const struct btf_type *btf_type_resolve_func_ptr(const struct btf *btf, | |
208 | u32 id, u32 *res_id); | |
85d33df3 MKL |
209 | const struct btf_type * |
210 | btf_resolve_size(const struct btf *btf, const struct btf_type *type, | |
6298399b | 211 | u32 *type_size); |
e6ac2450 | 212 | const char *btf_type_str(const struct btf_type *t); |
27ae7997 MKL |
213 | |
214 | #define for_each_member(i, struct_type, member) \ | |
215 | for (i = 0, member = btf_type_member(struct_type); \ | |
216 | i < btf_type_vlen(struct_type); \ | |
217 | i++, member++) | |
f6161a8f | 218 | |
eaa6bcb7 HL |
219 | #define for_each_vsi(i, datasec_type, member) \ |
220 | for (i = 0, member = btf_type_var_secinfo(datasec_type); \ | |
221 | i < btf_type_vlen(datasec_type); \ | |
222 | i++, member++) | |
223 | ||
38207291 MKL |
224 | static inline bool btf_type_is_ptr(const struct btf_type *t) |
225 | { | |
226 | return BTF_INFO_KIND(t->info) == BTF_KIND_PTR; | |
227 | } | |
228 | ||
229 | static inline bool btf_type_is_int(const struct btf_type *t) | |
230 | { | |
231 | return BTF_INFO_KIND(t->info) == BTF_KIND_INT; | |
232 | } | |
233 | ||
a9b59159 JF |
234 | static inline bool btf_type_is_small_int(const struct btf_type *t) |
235 | { | |
236 | return btf_type_is_int(t) && t->size <= sizeof(u64); | |
237 | } | |
238 | ||
49f67f39 IL |
239 | static inline u8 btf_int_encoding(const struct btf_type *t) |
240 | { | |
241 | return BTF_INT_ENCODING(*(u32 *)(t + 1)); | |
242 | } | |
243 | ||
244 | static inline bool btf_type_is_signed_int(const struct btf_type *t) | |
245 | { | |
246 | return btf_type_is_int(t) && (btf_int_encoding(t) & BTF_INT_SIGNED); | |
247 | } | |
248 | ||
38207291 MKL |
249 | static inline bool btf_type_is_enum(const struct btf_type *t) |
250 | { | |
251 | return BTF_INFO_KIND(t->info) == BTF_KIND_ENUM; | |
252 | } | |
253 | ||
6089fb32 YS |
254 | static inline bool btf_is_any_enum(const struct btf_type *t) |
255 | { | |
256 | return BTF_INFO_KIND(t->info) == BTF_KIND_ENUM || | |
257 | BTF_INFO_KIND(t->info) == BTF_KIND_ENUM64; | |
258 | } | |
259 | ||
260 | static inline bool btf_kind_core_compat(const struct btf_type *t1, | |
261 | const struct btf_type *t2) | |
262 | { | |
263 | return BTF_INFO_KIND(t1->info) == BTF_INFO_KIND(t2->info) || | |
264 | (btf_is_any_enum(t1) && btf_is_any_enum(t2)); | |
265 | } | |
266 | ||
29db4bea AS |
267 | static inline bool str_is_empty(const char *s) |
268 | { | |
269 | return !s || !s[0]; | |
270 | } | |
271 | ||
272 | static inline u16 btf_kind(const struct btf_type *t) | |
273 | { | |
274 | return BTF_INFO_KIND(t->info); | |
275 | } | |
276 | ||
277 | static inline bool btf_is_enum(const struct btf_type *t) | |
278 | { | |
279 | return btf_kind(t) == BTF_KIND_ENUM; | |
280 | } | |
281 | ||
6089fb32 YS |
282 | static inline bool btf_is_enum64(const struct btf_type *t) |
283 | { | |
284 | return btf_kind(t) == BTF_KIND_ENUM64; | |
285 | } | |
286 | ||
287 | static inline u64 btf_enum64_value(const struct btf_enum64 *e) | |
288 | { | |
289 | return ((u64)e->val_hi32 << 32) | e->val_lo32; | |
290 | } | |
291 | ||
29db4bea AS |
292 | static inline bool btf_is_composite(const struct btf_type *t) |
293 | { | |
294 | u16 kind = btf_kind(t); | |
295 | ||
296 | return kind == BTF_KIND_STRUCT || kind == BTF_KIND_UNION; | |
297 | } | |
298 | ||
299 | static inline bool btf_is_array(const struct btf_type *t) | |
300 | { | |
301 | return btf_kind(t) == BTF_KIND_ARRAY; | |
302 | } | |
303 | ||
304 | static inline bool btf_is_int(const struct btf_type *t) | |
305 | { | |
306 | return btf_kind(t) == BTF_KIND_INT; | |
307 | } | |
308 | ||
309 | static inline bool btf_is_ptr(const struct btf_type *t) | |
310 | { | |
311 | return btf_kind(t) == BTF_KIND_PTR; | |
312 | } | |
313 | ||
314 | static inline u8 btf_int_offset(const struct btf_type *t) | |
315 | { | |
316 | return BTF_INT_OFFSET(*(u32 *)(t + 1)); | |
317 | } | |
318 | ||
34747c41 MKL |
319 | static inline bool btf_type_is_scalar(const struct btf_type *t) |
320 | { | |
321 | return btf_type_is_int(t) || btf_type_is_enum(t); | |
322 | } | |
323 | ||
38207291 MKL |
324 | static inline bool btf_type_is_typedef(const struct btf_type *t) |
325 | { | |
326 | return BTF_INFO_KIND(t->info) == BTF_KIND_TYPEDEF; | |
327 | } | |
328 | ||
23da464d KKD |
329 | static inline bool btf_type_is_volatile(const struct btf_type *t) |
330 | { | |
331 | return BTF_INFO_KIND(t->info) == BTF_KIND_VOLATILE; | |
332 | } | |
333 | ||
38207291 MKL |
334 | static inline bool btf_type_is_func(const struct btf_type *t) |
335 | { | |
336 | return BTF_INFO_KIND(t->info) == BTF_KIND_FUNC; | |
337 | } | |
338 | ||
339 | static inline bool btf_type_is_func_proto(const struct btf_type *t) | |
340 | { | |
341 | return BTF_INFO_KIND(t->info) == BTF_KIND_FUNC_PROTO; | |
342 | } | |
343 | ||
4976b718 HL |
344 | static inline bool btf_type_is_var(const struct btf_type *t) |
345 | { | |
346 | return BTF_INFO_KIND(t->info) == BTF_KIND_VAR; | |
347 | } | |
348 | ||
c6f1bfe8 YS |
349 | static inline bool btf_type_is_type_tag(const struct btf_type *t) |
350 | { | |
351 | return BTF_INFO_KIND(t->info) == BTF_KIND_TYPE_TAG; | |
352 | } | |
353 | ||
4976b718 HL |
354 | /* union is only a special case of struct: |
355 | * all its offsetof(member) == 0 | |
356 | */ | |
357 | static inline bool btf_type_is_struct(const struct btf_type *t) | |
358 | { | |
359 | u8 kind = BTF_INFO_KIND(t->info); | |
360 | ||
361 | return kind == BTF_KIND_STRUCT || kind == BTF_KIND_UNION; | |
362 | } | |
363 | ||
00b85860 KKD |
364 | static inline bool __btf_type_is_struct(const struct btf_type *t) |
365 | { | |
366 | return BTF_INFO_KIND(t->info) == BTF_KIND_STRUCT; | |
367 | } | |
368 | ||
369 | static inline bool btf_type_is_array(const struct btf_type *t) | |
370 | { | |
371 | return BTF_INFO_KIND(t->info) == BTF_KIND_ARRAY; | |
372 | } | |
373 | ||
27ae7997 MKL |
374 | static inline u16 btf_type_vlen(const struct btf_type *t) |
375 | { | |
376 | return BTF_INFO_VLEN(t->info); | |
377 | } | |
378 | ||
29db4bea AS |
379 | static inline u16 btf_vlen(const struct btf_type *t) |
380 | { | |
381 | return btf_type_vlen(t); | |
382 | } | |
383 | ||
be8704ff AS |
384 | static inline u16 btf_func_linkage(const struct btf_type *t) |
385 | { | |
386 | return BTF_INFO_VLEN(t->info); | |
387 | } | |
388 | ||
27ae7997 MKL |
389 | static inline bool btf_type_kflag(const struct btf_type *t) |
390 | { | |
391 | return BTF_INFO_KFLAG(t->info); | |
392 | } | |
393 | ||
8293eb99 AS |
394 | static inline u32 __btf_member_bit_offset(const struct btf_type *struct_type, |
395 | const struct btf_member *member) | |
85d33df3 MKL |
396 | { |
397 | return btf_type_kflag(struct_type) ? BTF_MEMBER_BIT_OFFSET(member->offset) | |
398 | : member->offset; | |
399 | } | |
400 | ||
8293eb99 AS |
401 | static inline u32 __btf_member_bitfield_size(const struct btf_type *struct_type, |
402 | const struct btf_member *member) | |
27ae7997 MKL |
403 | { |
404 | return btf_type_kflag(struct_type) ? BTF_MEMBER_BITFIELD_SIZE(member->offset) | |
405 | : 0; | |
406 | } | |
407 | ||
29db4bea AS |
408 | static inline struct btf_member *btf_members(const struct btf_type *t) |
409 | { | |
410 | return (struct btf_member *)(t + 1); | |
411 | } | |
412 | ||
413 | static inline u32 btf_member_bit_offset(const struct btf_type *t, u32 member_idx) | |
414 | { | |
415 | const struct btf_member *m = btf_members(t) + member_idx; | |
416 | ||
417 | return __btf_member_bit_offset(t, m); | |
418 | } | |
419 | ||
420 | static inline u32 btf_member_bitfield_size(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_bitfield_size(t, m); | |
425 | } | |
426 | ||
27ae7997 MKL |
427 | static inline const struct btf_member *btf_type_member(const struct btf_type *t) |
428 | { | |
429 | return (const struct btf_member *)(t + 1); | |
430 | } | |
431 | ||
29db4bea AS |
432 | static inline struct btf_array *btf_array(const struct btf_type *t) |
433 | { | |
434 | return (struct btf_array *)(t + 1); | |
435 | } | |
436 | ||
437 | static inline struct btf_enum *btf_enum(const struct btf_type *t) | |
438 | { | |
439 | return (struct btf_enum *)(t + 1); | |
440 | } | |
441 | ||
6089fb32 YS |
442 | static inline struct btf_enum64 *btf_enum64(const struct btf_type *t) |
443 | { | |
444 | return (struct btf_enum64 *)(t + 1); | |
445 | } | |
446 | ||
eaa6bcb7 HL |
447 | static inline const struct btf_var_secinfo *btf_type_var_secinfo( |
448 | const struct btf_type *t) | |
449 | { | |
450 | return (const struct btf_var_secinfo *)(t + 1); | |
451 | } | |
452 | ||
e70e13e7 MC |
453 | static inline struct btf_param *btf_params(const struct btf_type *t) |
454 | { | |
455 | return (struct btf_param *)(t + 1); | |
456 | } | |
457 | ||
8ffa5cc1 KKD |
458 | static inline int btf_id_cmp_func(const void *a, const void *b) |
459 | { | |
460 | const int *pa = a, *pb = b; | |
461 | ||
462 | return *pa - *pb; | |
463 | } | |
464 | ||
465 | static inline bool btf_id_set_contains(const struct btf_id_set *set, u32 id) | |
466 | { | |
467 | return bsearch(&id, set->ids, set->cnt, sizeof(u32), btf_id_cmp_func) != NULL; | |
468 | } | |
469 | ||
470 | static inline void *btf_id_set8_contains(const struct btf_id_set8 *set, u32 id) | |
471 | { | |
472 | return bsearch(&id, set->pairs, set->cnt, sizeof(set->pairs[0]), btf_id_cmp_func); | |
473 | } | |
474 | ||
22dc4a0f | 475 | struct bpf_prog; |
00b85860 | 476 | struct bpf_verifier_log; |
22dc4a0f | 477 | |
00b85860 | 478 | #ifdef CONFIG_BPF_SYSCALL |
838e9690 YS |
479 | const struct btf_type *btf_type_by_id(const struct btf *btf, u32 type_id); |
480 | const char *btf_name_by_offset(const struct btf *btf, u32 offset); | |
8580ac94 | 481 | struct btf *btf_parse_vmlinux(void); |
5b92a28a | 482 | struct btf *bpf_prog_get_target_btf(const struct bpf_prog *prog); |
a4703e31 | 483 | u32 *btf_kfunc_id_set_contains(const struct btf *btf, |
dee872e1 | 484 | enum bpf_prog_type prog_type, |
a4703e31 | 485 | u32 kfunc_btf_id); |
5b481aca | 486 | u32 *btf_kfunc_is_modify_return(const struct btf *btf, u32 kfunc_btf_id); |
dee872e1 KKD |
487 | int register_btf_kfunc_id_set(enum bpf_prog_type prog_type, |
488 | const struct btf_kfunc_id_set *s); | |
5b481aca | 489 | int register_btf_fmodret_id_set(const struct btf_kfunc_id_set *kset); |
5ce937d6 KKD |
490 | s32 btf_find_dtor_kfunc(struct btf *btf, u32 btf_id); |
491 | int register_btf_id_dtor_kfuncs(const struct btf_id_dtor_kfunc *dtors, u32 add_cnt, | |
492 | struct module *owner); | |
8ffa5cc1 | 493 | struct btf_struct_meta *btf_find_struct_meta(const struct btf *btf, u32 btf_id); |
00b85860 KKD |
494 | const struct btf_member * |
495 | btf_get_prog_ctx_type(struct bpf_verifier_log *log, const struct btf *btf, | |
496 | const struct btf_type *t, enum bpf_prog_type prog_type, | |
497 | int arg); | |
fd264ca0 | 498 | int get_kern_ctx_btf_id(struct bpf_verifier_log *log, enum bpf_prog_type prog_type); |
00b85860 KKD |
499 | bool btf_types_are_same(const struct btf *btf1, u32 id1, |
500 | const struct btf *btf2, u32 id2); | |
f6161a8f YS |
501 | #else |
502 | static inline const struct btf_type *btf_type_by_id(const struct btf *btf, | |
503 | u32 type_id) | |
504 | { | |
505 | return NULL; | |
506 | } | |
507 | static inline const char *btf_name_by_offset(const struct btf *btf, | |
508 | u32 offset) | |
509 | { | |
510 | return NULL; | |
511 | } | |
a4703e31 | 512 | static inline u32 *btf_kfunc_id_set_contains(const struct btf *btf, |
dee872e1 | 513 | enum bpf_prog_type prog_type, |
dee872e1 KKD |
514 | u32 kfunc_btf_id) |
515 | { | |
a4703e31 | 516 | return NULL; |
dee872e1 KKD |
517 | } |
518 | static inline int register_btf_kfunc_id_set(enum bpf_prog_type prog_type, | |
519 | const struct btf_kfunc_id_set *s) | |
520 | { | |
521 | return 0; | |
522 | } | |
5ce937d6 KKD |
523 | static inline s32 btf_find_dtor_kfunc(struct btf *btf, u32 btf_id) |
524 | { | |
525 | return -ENOENT; | |
526 | } | |
527 | static inline int register_btf_id_dtor_kfuncs(const struct btf_id_dtor_kfunc *dtors, | |
528 | u32 add_cnt, struct module *owner) | |
529 | { | |
530 | return 0; | |
531 | } | |
8ffa5cc1 KKD |
532 | static inline struct btf_struct_meta *btf_find_struct_meta(const struct btf *btf, u32 btf_id) |
533 | { | |
534 | return NULL; | |
535 | } | |
00b85860 KKD |
536 | static inline const struct btf_member * |
537 | btf_get_prog_ctx_type(struct bpf_verifier_log *log, const struct btf *btf, | |
538 | const struct btf_type *t, enum bpf_prog_type prog_type, | |
539 | int arg) | |
540 | { | |
541 | return NULL; | |
542 | } | |
fd264ca0 YS |
543 | static inline int get_kern_ctx_btf_id(struct bpf_verifier_log *log, |
544 | enum bpf_prog_type prog_type) { | |
545 | return -EINVAL; | |
546 | } | |
00b85860 KKD |
547 | static inline bool btf_types_are_same(const struct btf *btf1, u32 id1, |
548 | const struct btf *btf2, u32 id2) | |
549 | { | |
550 | return false; | |
551 | } | |
f6161a8f | 552 | #endif |
eb3f595d | 553 | |
eb1f7f71 BT |
554 | static inline bool btf_type_is_struct_ptr(struct btf *btf, const struct btf_type *t) |
555 | { | |
556 | if (!btf_type_is_ptr(t)) | |
557 | return false; | |
558 | ||
559 | t = btf_type_skip_modifiers(btf, t->type, NULL); | |
560 | ||
561 | return btf_type_is_struct(t); | |
562 | } | |
563 | ||
eb3f595d | 564 | #endif |