1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /* Copyright (c) 2011-2014 PLUMgrid, http://plumgrid.com
3 */
4 #ifndef _LINUX_BPF_H
5 #define _LINUX_BPF_H 1
6
7 #include <uapi/linux/bpf.h>
8
9 #include <linux/workqueue.h>
10 #include <linux/file.h>
11 #include <linux/percpu.h>
12 #include <linux/err.h>
13 #include <linux/rbtree_latch.h>
14 #include <linux/numa.h>
15 #include <linux/mm_types.h>
16 #include <linux/wait.h>
17 #include <linux/u64_stats_sync.h>
18 #include <linux/refcount.h>
19 #include <linux/mutex.h>
20 #include <linux/module.h>
21 #include <linux/kallsyms.h>
22 #include <linux/capability.h>
23 #include <linux/percpu-refcount.h>
24
25 struct bpf_verifier_env;
26 struct bpf_verifier_log;
27 struct perf_event;
28 struct bpf_prog;
29 struct bpf_prog_aux;
30 struct bpf_map;
31 struct sock;
32 struct seq_file;
33 struct btf;
34 struct btf_type;
35 struct exception_table_entry;
36 struct seq_operations;
37 struct bpf_iter_aux_info;
38 struct bpf_local_storage;
39 struct bpf_local_storage_map;
40
41 extern struct idr btf_idr;
42 extern spinlock_t btf_idr_lock;
43
44 typedef int (*bpf_iter_init_seq_priv_t)(void *private_data,
45 struct bpf_iter_aux_info *aux);
46 typedef void (*bpf_iter_fini_seq_priv_t)(void *private_data);
47 struct bpf_iter_seq_info {
48 const struct seq_operations *seq_ops;
49 bpf_iter_init_seq_priv_t init_seq_private;
50 bpf_iter_fini_seq_priv_t fini_seq_private;
51 u32 seq_priv_size;
52 };
53
54 /* map is generic key/value storage optionally accesible by eBPF programs */
55 struct bpf_map_ops {
56 /* funcs callable from userspace (via syscall) */
57 int (*map_alloc_check)(union bpf_attr *attr);
58 struct bpf_map *(*map_alloc)(union bpf_attr *attr);
59 void (*map_release)(struct bpf_map *map, struct file *map_file);
60 void (*map_free)(struct bpf_map *map);
61 int (*map_get_next_key)(struct bpf_map *map, void *key, void *next_key);
62 void (*map_release_uref)(struct bpf_map *map);
63 void *(*map_lookup_elem_sys_only)(struct bpf_map *map, void *key);
64 int (*map_lookup_batch)(struct bpf_map *map, const union bpf_attr *attr,
65 union bpf_attr __user *uattr);
66 int (*map_lookup_and_delete_batch)(struct bpf_map *map,
67 const union bpf_attr *attr,
68 union bpf_attr __user *uattr);
69 int (*map_update_batch)(struct bpf_map *map, const union bpf_attr *attr,
70 union bpf_attr __user *uattr);
71 int (*map_delete_batch)(struct bpf_map *map, const union bpf_attr *attr,
72 union bpf_attr __user *uattr);
73
74 /* funcs callable from userspace and from eBPF programs */
75 void *(*map_lookup_elem)(struct bpf_map *map, void *key);
76 int (*map_update_elem)(struct bpf_map *map, void *key, void *value, u64 flags);
77 int (*map_delete_elem)(struct bpf_map *map, void *key);
78 int (*map_push_elem)(struct bpf_map *map, void *value, u64 flags);
79 int (*map_pop_elem)(struct bpf_map *map, void *value);
80 int (*map_peek_elem)(struct bpf_map *map, void *value);
81
82 /* funcs called by prog_array and perf_event_array map */
83 void *(*map_fd_get_ptr)(struct bpf_map *map, struct file *map_file,
84 int fd);
85 void (*map_fd_put_ptr)(void *ptr);
86 int (*map_gen_lookup)(struct bpf_map *map, struct bpf_insn *insn_buf);
87 u32 (*map_fd_sys_lookup_elem)(void *ptr);
88 void (*map_seq_show_elem)(struct bpf_map *map, void *key,
89 struct seq_file *m);
90 int (*map_check_btf)(const struct bpf_map *map,
91 const struct btf *btf,
92 const struct btf_type *key_type,
93 const struct btf_type *value_type);
94
95 /* Prog poke tracking helpers. */
96 int (*map_poke_track)(struct bpf_map *map, struct bpf_prog_aux *aux);
97 void (*map_poke_untrack)(struct bpf_map *map, struct bpf_prog_aux *aux);
98 void (*map_poke_run)(struct bpf_map *map, u32 key, struct bpf_prog *old,
99 struct bpf_prog *new);
100
101 /* Direct value access helpers. */
102 int (*map_direct_value_addr)(const struct bpf_map *map,
103 u64 *imm, u32 off);
104 int (*map_direct_value_meta)(const struct bpf_map *map,
105 u64 imm, u32 *off);
106 int (*map_mmap)(struct bpf_map *map, struct vm_area_struct *vma);
107 __poll_t (*map_poll)(struct bpf_map *map, struct file *filp,
108 struct poll_table_struct *pts);
109
110 /* Functions called by bpf_local_storage maps */
111 int (*map_local_storage_charge)(struct bpf_local_storage_map *smap,
112 void *owner, u32 size);
113 void (*map_local_storage_uncharge)(struct bpf_local_storage_map *smap,
114 void *owner, u32 size);
115 struct bpf_local_storage __rcu ** (*map_owner_storage_ptr)(void *owner);
116
117 /* map_meta_equal must be implemented for maps that can be
118 * used as an inner map. It is a runtime check to ensure
119 * an inner map can be inserted to an outer map.
120 *
121 * Some properties of the inner map has been used during the
122 * verification time. When inserting an inner map at the runtime,
123 * map_meta_equal has to ensure the inserting map has the same
124 * properties that the verifier has used earlier.
125 */
126 bool (*map_meta_equal)(const struct bpf_map *meta0,
127 const struct bpf_map *meta1);
128
129 /* BTF name and id of struct allocated by map_alloc */
130 const char * const map_btf_name;
131 int *map_btf_id;
132
133 /* bpf_iter info used to open a seq_file */
134 const struct bpf_iter_seq_info *iter_seq_info;
135 };
136
137 struct bpf_map_memory {
138 u32 pages;
139 struct user_struct *user;
140 };
141
142 struct bpf_map {
143 /* The first two cachelines with read-mostly members of which some
144 * are also accessed in fast-path (e.g. ops, max_entries).
145 */
146 const struct bpf_map_ops *ops ____cacheline_aligned;
147 struct bpf_map *inner_map_meta;
148 #ifdef CONFIG_SECURITY
149 void *security;
150 #endif
151 enum bpf_map_type map_type;
152 u32 key_size;
153 u32 value_size;
154 u32 max_entries;
155 u32 map_flags;
156 int spin_lock_off; /* >=0 valid offset, <0 error */
157 u32 id;
158 int numa_node;
159 u32 btf_key_type_id;
160 u32 btf_value_type_id;
161 struct btf *btf;
162 struct bpf_map_memory memory;
163 char name[BPF_OBJ_NAME_LEN];
164 u32 btf_vmlinux_value_type_id;
165 bool bypass_spec_v1;
166 bool frozen; /* write-once; write-protected by freeze_mutex */
167 /* 22 bytes hole */
168
169 /* The 3rd and 4th cacheline with misc members to avoid false sharing
170 * particularly with refcounting.
171 */
172 atomic64_t refcnt ____cacheline_aligned;
173 atomic64_t usercnt;
174 struct work_struct work;
175 struct mutex freeze_mutex;
176 atomic64_t writecnt;
177 };
178
map_value_has_spin_lock(const struct bpf_map * map)179 static inline bool map_value_has_spin_lock(const struct bpf_map *map)
180 {
181 return map->spin_lock_off >= 0;
182 }
183
check_and_init_map_lock(struct bpf_map * map,void * dst)184 static inline void check_and_init_map_lock(struct bpf_map *map, void *dst)
185 {
186 if (likely(!map_value_has_spin_lock(map)))
187 return;
188 *(struct bpf_spin_lock *)(dst + map->spin_lock_off) =
189 (struct bpf_spin_lock){};
190 }
191
192 /* copy everything but bpf_spin_lock */
copy_map_value(struct bpf_map * map,void * dst,void * src)193 static inline void copy_map_value(struct bpf_map *map, void *dst, void *src)
194 {
195 if (unlikely(map_value_has_spin_lock(map))) {
196 u32 off = map->spin_lock_off;
197
198 memcpy(dst, src, off);
199 memcpy(dst + off + sizeof(struct bpf_spin_lock),
200 src + off + sizeof(struct bpf_spin_lock),
201 map->value_size - off - sizeof(struct bpf_spin_lock));
202 } else {
203 memcpy(dst, src, map->value_size);
204 }
205 }
206 void copy_map_value_locked(struct bpf_map *map, void *dst, void *src,
207 bool lock_src);
208 int bpf_obj_name_cpy(char *dst, const char *src, unsigned int size);
209
210 struct bpf_offload_dev;
211 struct bpf_offloaded_map;
212
213 struct bpf_map_dev_ops {
214 int (*map_get_next_key)(struct bpf_offloaded_map *map,
215 void *key, void *next_key);
216 int (*map_lookup_elem)(struct bpf_offloaded_map *map,
217 void *key, void *value);
218 int (*map_update_elem)(struct bpf_offloaded_map *map,
219 void *key, void *value, u64 flags);
220 int (*map_delete_elem)(struct bpf_offloaded_map *map, void *key);
221 };
222
223 struct bpf_offloaded_map {
224 struct bpf_map map;
225 struct net_device *netdev;
226 const struct bpf_map_dev_ops *dev_ops;
227 void *dev_priv;
228 struct list_head offloads;
229 };
230
map_to_offmap(struct bpf_map * map)231 static inline struct bpf_offloaded_map *map_to_offmap(struct bpf_map *map)
232 {
233 return container_of(map, struct bpf_offloaded_map, map);
234 }
235
bpf_map_offload_neutral(const struct bpf_map * map)236 static inline bool bpf_map_offload_neutral(const struct bpf_map *map)
237 {
238 return map->map_type == BPF_MAP_TYPE_PERF_EVENT_ARRAY;
239 }
240
bpf_map_support_seq_show(const struct bpf_map * map)241 static inline bool bpf_map_support_seq_show(const struct bpf_map *map)
242 {
243 return (map->btf_value_type_id || map->btf_vmlinux_value_type_id) &&
244 map->ops->map_seq_show_elem;
245 }
246
247 int map_check_no_btf(const struct bpf_map *map,
248 const struct btf *btf,
249 const struct btf_type *key_type,
250 const struct btf_type *value_type);
251
252 bool bpf_map_meta_equal(const struct bpf_map *meta0,
253 const struct bpf_map *meta1);
254
255 extern const struct bpf_map_ops bpf_map_offload_ops;
256
257 /* bpf_type_flag contains a set of flags that are applicable to the values of
258 * arg_type, ret_type and reg_type. For example, a pointer value may be null,
259 * or a memory is read-only. We classify types into two categories: base types
260 * and extended types. Extended types are base types combined with a type flag.
261 *
262 * Currently there are no more than 32 base types in arg_type, ret_type and
263 * reg_types.
264 */
265 #define BPF_BASE_TYPE_BITS 8
266
267 enum bpf_type_flag {
268 /* PTR may be NULL. */
269 PTR_MAYBE_NULL = BIT(0 + BPF_BASE_TYPE_BITS),
270
271 /* MEM is read-only. When applied on bpf_arg, it indicates the arg is
272 * compatible with both mutable and immutable memory.
273 */
274 MEM_RDONLY = BIT(1 + BPF_BASE_TYPE_BITS),
275
276 /* MEM was "allocated" from a different helper, and cannot be mixed
277 * with regular non-MEM_ALLOC'ed MEM types.
278 */
279 MEM_ALLOC = BIT(2 + BPF_BASE_TYPE_BITS),
280
281 __BPF_TYPE_LAST_FLAG = MEM_ALLOC,
282 };
283
284 /* Max number of base types. */
285 #define BPF_BASE_TYPE_LIMIT (1UL << BPF_BASE_TYPE_BITS)
286
287 /* Max number of all types. */
288 #define BPF_TYPE_LIMIT (__BPF_TYPE_LAST_FLAG | (__BPF_TYPE_LAST_FLAG - 1))
289
290 /* function argument constraints */
291 enum bpf_arg_type {
292 ARG_DONTCARE = 0, /* unused argument in helper function */
293
294 /* the following constraints used to prototype
295 * bpf_map_lookup/update/delete_elem() functions
296 */
297 ARG_CONST_MAP_PTR, /* const argument used as pointer to bpf_map */
298 ARG_PTR_TO_MAP_KEY, /* pointer to stack used as map key */
299 ARG_PTR_TO_MAP_VALUE, /* pointer to stack used as map value */
300 ARG_PTR_TO_UNINIT_MAP_VALUE, /* pointer to valid memory used to store a map value */
301
302 /* the following constraints used to prototype bpf_memcmp() and other
303 * functions that access data on eBPF program stack
304 */
305 ARG_PTR_TO_MEM, /* pointer to valid memory (stack, packet, map value) */
306 ARG_PTR_TO_UNINIT_MEM, /* pointer to memory does not need to be initialized,
307 * helper function must fill all bytes or clear
308 * them in error case.
309 */
310
311 ARG_CONST_SIZE, /* number of bytes accessed from memory */
312 ARG_CONST_SIZE_OR_ZERO, /* number of bytes accessed from memory or 0 */
313
314 ARG_PTR_TO_CTX, /* pointer to context */
315 ARG_ANYTHING, /* any (initialized) argument is ok */
316 ARG_PTR_TO_SPIN_LOCK, /* pointer to bpf_spin_lock */
317 ARG_PTR_TO_SOCK_COMMON, /* pointer to sock_common */
318 ARG_PTR_TO_INT, /* pointer to int */
319 ARG_PTR_TO_LONG, /* pointer to long */
320 ARG_PTR_TO_SOCKET, /* pointer to bpf_sock (fullsock) */
321 ARG_PTR_TO_BTF_ID, /* pointer to in-kernel struct */
322 ARG_PTR_TO_ALLOC_MEM, /* pointer to dynamically allocated memory */
323 ARG_CONST_ALLOC_SIZE_OR_ZERO, /* number of allocated bytes requested */
324 ARG_PTR_TO_BTF_ID_SOCK_COMMON, /* pointer to in-kernel sock_common or bpf-mirrored bpf_sock */
325 ARG_PTR_TO_PERCPU_BTF_ID, /* pointer to in-kernel percpu type */
326 __BPF_ARG_TYPE_MAX,
327
328 /* Extended arg_types. */
329 ARG_PTR_TO_MAP_VALUE_OR_NULL = PTR_MAYBE_NULL | ARG_PTR_TO_MAP_VALUE,
330 ARG_PTR_TO_MEM_OR_NULL = PTR_MAYBE_NULL | ARG_PTR_TO_MEM,
331 ARG_PTR_TO_CTX_OR_NULL = PTR_MAYBE_NULL | ARG_PTR_TO_CTX,
332 ARG_PTR_TO_SOCKET_OR_NULL = PTR_MAYBE_NULL | ARG_PTR_TO_SOCKET,
333 ARG_PTR_TO_ALLOC_MEM_OR_NULL = PTR_MAYBE_NULL | ARG_PTR_TO_ALLOC_MEM,
334
335 /* This must be the last entry. Its purpose is to ensure the enum is
336 * wide enough to hold the higher bits reserved for bpf_type_flag.
337 */
338 __BPF_ARG_TYPE_LIMIT = BPF_TYPE_LIMIT,
339 };
340 static_assert(__BPF_ARG_TYPE_MAX <= BPF_BASE_TYPE_LIMIT);
341
342 /* type of values returned from helper functions */
343 enum bpf_return_type {
344 RET_INTEGER, /* function returns integer */
345 RET_VOID, /* function doesn't return anything */
346 RET_PTR_TO_MAP_VALUE, /* returns a pointer to map elem value */
347 RET_PTR_TO_SOCKET, /* returns a pointer to a socket */
348 RET_PTR_TO_TCP_SOCK, /* returns a pointer to a tcp_sock */
349 RET_PTR_TO_SOCK_COMMON, /* returns a pointer to a sock_common */
350 RET_PTR_TO_ALLOC_MEM, /* returns a pointer to dynamically allocated memory */
351 RET_PTR_TO_MEM_OR_BTF_ID, /* returns a pointer to a valid memory or a btf_id */
352 RET_PTR_TO_BTF_ID, /* returns a pointer to a btf_id */
353 __BPF_RET_TYPE_MAX,
354
355 /* Extended ret_types. */
356 RET_PTR_TO_MAP_VALUE_OR_NULL = PTR_MAYBE_NULL | RET_PTR_TO_MAP_VALUE,
357 RET_PTR_TO_SOCKET_OR_NULL = PTR_MAYBE_NULL | RET_PTR_TO_SOCKET,
358 RET_PTR_TO_TCP_SOCK_OR_NULL = PTR_MAYBE_NULL | RET_PTR_TO_TCP_SOCK,
359 RET_PTR_TO_SOCK_COMMON_OR_NULL = PTR_MAYBE_NULL | RET_PTR_TO_SOCK_COMMON,
360 RET_PTR_TO_ALLOC_MEM_OR_NULL = PTR_MAYBE_NULL | MEM_ALLOC | RET_PTR_TO_ALLOC_MEM,
361 RET_PTR_TO_BTF_ID_OR_NULL = PTR_MAYBE_NULL | RET_PTR_TO_BTF_ID,
362
363 /* This must be the last entry. Its purpose is to ensure the enum is
364 * wide enough to hold the higher bits reserved for bpf_type_flag.
365 */
366 __BPF_RET_TYPE_LIMIT = BPF_TYPE_LIMIT,
367 };
368 static_assert(__BPF_RET_TYPE_MAX <= BPF_BASE_TYPE_LIMIT);
369
370 /* eBPF function prototype used by verifier to allow BPF_CALLs from eBPF programs
371 * to in-kernel helper functions and for adjusting imm32 field in BPF_CALL
372 * instructions after verifying
373 */
374 struct bpf_func_proto {
375 u64 (*func)(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
376 bool gpl_only;
377 bool pkt_access;
378 enum bpf_return_type ret_type;
379 union {
380 struct {
381 enum bpf_arg_type arg1_type;
382 enum bpf_arg_type arg2_type;
383 enum bpf_arg_type arg3_type;
384 enum bpf_arg_type arg4_type;
385 enum bpf_arg_type arg5_type;
386 };
387 enum bpf_arg_type arg_type[5];
388 };
389 union {
390 struct {
391 u32 *arg1_btf_id;
392 u32 *arg2_btf_id;
393 u32 *arg3_btf_id;
394 u32 *arg4_btf_id;
395 u32 *arg5_btf_id;
396 };
397 u32 *arg_btf_id[5];
398 };
399 int *ret_btf_id; /* return value btf_id */
400 bool (*allowed)(const struct bpf_prog *prog);
401 };
402
403 /* bpf_context is intentionally undefined structure. Pointer to bpf_context is
404 * the first argument to eBPF programs.
405 * For socket filters: 'struct bpf_context *' == 'struct sk_buff *'
406 */
407 struct bpf_context;
408
409 enum bpf_access_type {
410 BPF_READ = 1,
411 BPF_WRITE = 2
412 };
413
414 /* types of values stored in eBPF registers */
415 /* Pointer types represent:
416 * pointer
417 * pointer + imm
418 * pointer + (u16) var
419 * pointer + (u16) var + imm
420 * if (range > 0) then [ptr, ptr + range - off) is safe to access
421 * if (id > 0) means that some 'var' was added
422 * if (off > 0) means that 'imm' was added
423 */
424 enum bpf_reg_type {
425 NOT_INIT = 0, /* nothing was written into register */
426 SCALAR_VALUE, /* reg doesn't contain a valid pointer */
427 PTR_TO_CTX, /* reg points to bpf_context */
428 CONST_PTR_TO_MAP, /* reg points to struct bpf_map */
429 PTR_TO_MAP_VALUE, /* reg points to map element value */
430 PTR_TO_STACK, /* reg == frame_pointer + offset */
431 PTR_TO_PACKET_META, /* skb->data - meta_len */
432 PTR_TO_PACKET, /* reg points to skb->data */
433 PTR_TO_PACKET_END, /* skb->data + headlen */
434 PTR_TO_FLOW_KEYS, /* reg points to bpf_flow_keys */
435 PTR_TO_SOCKET, /* reg points to struct bpf_sock */
436 PTR_TO_SOCK_COMMON, /* reg points to sock_common */
437 PTR_TO_TCP_SOCK, /* reg points to struct tcp_sock */
438 PTR_TO_TP_BUFFER, /* reg points to a writable raw tp's buffer */
439 PTR_TO_XDP_SOCK, /* reg points to struct xdp_sock */
440 /* PTR_TO_BTF_ID points to a kernel struct that does not need
441 * to be null checked by the BPF program. This does not imply the
442 * pointer is _not_ null and in practice this can easily be a null
443 * pointer when reading pointer chains. The assumption is program
444 * context will handle null pointer dereference typically via fault
445 * handling. The verifier must keep this in mind and can make no
446 * assumptions about null or non-null when doing branch analysis.
447 * Further, when passed into helpers the helpers can not, without
448 * additional context, assume the value is non-null.
449 */
450 PTR_TO_BTF_ID,
451 /* PTR_TO_BTF_ID_OR_NULL points to a kernel struct that has not
452 * been checked for null. Used primarily to inform the verifier
453 * an explicit null check is required for this struct.
454 */
455 PTR_TO_MEM, /* reg points to valid memory region */
456 PTR_TO_BUF, /* reg points to a read/write buffer */
457 PTR_TO_PERCPU_BTF_ID, /* reg points to a percpu kernel variable */
458 __BPF_REG_TYPE_MAX,
459
460 /* Extended reg_types. */
461 PTR_TO_MAP_VALUE_OR_NULL = PTR_MAYBE_NULL | PTR_TO_MAP_VALUE,
462 PTR_TO_SOCKET_OR_NULL = PTR_MAYBE_NULL | PTR_TO_SOCKET,
463 PTR_TO_SOCK_COMMON_OR_NULL = PTR_MAYBE_NULL | PTR_TO_SOCK_COMMON,
464 PTR_TO_TCP_SOCK_OR_NULL = PTR_MAYBE_NULL | PTR_TO_TCP_SOCK,
465 PTR_TO_BTF_ID_OR_NULL = PTR_MAYBE_NULL | PTR_TO_BTF_ID,
466
467 /* This must be the last entry. Its purpose is to ensure the enum is
468 * wide enough to hold the higher bits reserved for bpf_type_flag.
469 */
470 __BPF_REG_TYPE_LIMIT = BPF_TYPE_LIMIT,
471 };
472 static_assert(__BPF_REG_TYPE_MAX <= BPF_BASE_TYPE_LIMIT);
473
474 /* The information passed from prog-specific *_is_valid_access
475 * back to the verifier.
476 */
477 struct bpf_insn_access_aux {
478 enum bpf_reg_type reg_type;
479 union {
480 int ctx_field_size;
481 u32 btf_id;
482 };
483 struct bpf_verifier_log *log; /* for verbose logs */
484 };
485
486 static inline void
bpf_ctx_record_field_size(struct bpf_insn_access_aux * aux,u32 size)487 bpf_ctx_record_field_size(struct bpf_insn_access_aux *aux, u32 size)
488 {
489 aux->ctx_field_size = size;
490 }
491
492 struct bpf_prog_ops {
493 int (*test_run)(struct bpf_prog *prog, const union bpf_attr *kattr,
494 union bpf_attr __user *uattr);
495 };
496
497 struct bpf_verifier_ops {
498 /* return eBPF function prototype for verification */
499 const struct bpf_func_proto *
500 (*get_func_proto)(enum bpf_func_id func_id,
501 const struct bpf_prog *prog);
502
503 /* return true if 'size' wide access at offset 'off' within bpf_context
504 * with 'type' (read or write) is allowed
505 */
506 bool (*is_valid_access)(int off, int size, enum bpf_access_type type,
507 const struct bpf_prog *prog,
508 struct bpf_insn_access_aux *info);
509 int (*gen_prologue)(struct bpf_insn *insn, bool direct_write,
510 const struct bpf_prog *prog);
511 int (*gen_ld_abs)(const struct bpf_insn *orig,
512 struct bpf_insn *insn_buf);
513 u32 (*convert_ctx_access)(enum bpf_access_type type,
514 const struct bpf_insn *src,
515 struct bpf_insn *dst,
516 struct bpf_prog *prog, u32 *target_size);
517 int (*btf_struct_access)(struct bpf_verifier_log *log,
518 const struct btf_type *t, int off, int size,
519 enum bpf_access_type atype,
520 u32 *next_btf_id);
521 };
522
523 struct bpf_prog_offload_ops {
524 /* verifier basic callbacks */
525 int (*insn_hook)(struct bpf_verifier_env *env,
526 int insn_idx, int prev_insn_idx);
527 int (*finalize)(struct bpf_verifier_env *env);
528 /* verifier optimization callbacks (called after .finalize) */
529 int (*replace_insn)(struct bpf_verifier_env *env, u32 off,
530 struct bpf_insn *insn);
531 int (*remove_insns)(struct bpf_verifier_env *env, u32 off, u32 cnt);
532 /* program management callbacks */
533 int (*prepare)(struct bpf_prog *prog);
534 int (*translate)(struct bpf_prog *prog);
535 void (*destroy)(struct bpf_prog *prog);
536 };
537
538 struct bpf_prog_offload {
539 struct bpf_prog *prog;
540 struct net_device *netdev;
541 struct bpf_offload_dev *offdev;
542 void *dev_priv;
543 struct list_head offloads;
544 bool dev_state;
545 bool opt_failed;
546 void *jited_image;
547 u32 jited_len;
548 };
549
550 enum bpf_cgroup_storage_type {
551 BPF_CGROUP_STORAGE_SHARED,
552 BPF_CGROUP_STORAGE_PERCPU,
553 __BPF_CGROUP_STORAGE_MAX
554 };
555
556 #define MAX_BPF_CGROUP_STORAGE_TYPE __BPF_CGROUP_STORAGE_MAX
557
558 /* The longest tracepoint has 12 args.
559 * See include/trace/bpf_probe.h
560 */
561 #define MAX_BPF_FUNC_ARGS 12
562
563 struct bpf_prog_stats {
564 u64 cnt;
565 u64 nsecs;
566 struct u64_stats_sync syncp;
567 } __aligned(2 * sizeof(u64));
568
569 struct btf_func_model {
570 u8 ret_size;
571 u8 nr_args;
572 u8 arg_size[MAX_BPF_FUNC_ARGS];
573 };
574
575 /* Restore arguments before returning from trampoline to let original function
576 * continue executing. This flag is used for fentry progs when there are no
577 * fexit progs.
578 */
579 #define BPF_TRAMP_F_RESTORE_REGS BIT(0)
580 /* Call original function after fentry progs, but before fexit progs.
581 * Makes sense for fentry/fexit, normal calls and indirect calls.
582 */
583 #define BPF_TRAMP_F_CALL_ORIG BIT(1)
584 /* Skip current frame and return to parent. Makes sense for fentry/fexit
585 * programs only. Should not be used with normal calls and indirect calls.
586 */
587 #define BPF_TRAMP_F_SKIP_FRAME BIT(2)
588 /* Return the return value of fentry prog. Only used by bpf_struct_ops. */
589 #define BPF_TRAMP_F_RET_FENTRY_RET BIT(4)
590
591 /* Each call __bpf_prog_enter + call bpf_func + call __bpf_prog_exit is ~50
592 * bytes on x86. Pick a number to fit into BPF_IMAGE_SIZE / 2
593 */
594 #define BPF_MAX_TRAMP_PROGS 40
595
596 struct bpf_tramp_progs {
597 struct bpf_prog *progs[BPF_MAX_TRAMP_PROGS];
598 int nr_progs;
599 };
600
601 /* Different use cases for BPF trampoline:
602 * 1. replace nop at the function entry (kprobe equivalent)
603 * flags = BPF_TRAMP_F_RESTORE_REGS
604 * fentry = a set of programs to run before returning from trampoline
605 *
606 * 2. replace nop at the function entry (kprobe + kretprobe equivalent)
607 * flags = BPF_TRAMP_F_CALL_ORIG | BPF_TRAMP_F_SKIP_FRAME
608 * orig_call = fentry_ip + MCOUNT_INSN_SIZE
609 * fentry = a set of program to run before calling original function
610 * fexit = a set of program to run after original function
611 *
612 * 3. replace direct call instruction anywhere in the function body
613 * or assign a function pointer for indirect call (like tcp_congestion_ops->cong_avoid)
614 * With flags = 0
615 * fentry = a set of programs to run before returning from trampoline
616 * With flags = BPF_TRAMP_F_CALL_ORIG
617 * orig_call = original callback addr or direct function addr
618 * fentry = a set of program to run before calling original function
619 * fexit = a set of program to run after original function
620 */
621 struct bpf_tramp_image;
622 int arch_prepare_bpf_trampoline(struct bpf_tramp_image *tr, void *image, void *image_end,
623 const struct btf_func_model *m, u32 flags,
624 struct bpf_tramp_progs *tprogs,
625 void *orig_call);
626 /* these two functions are called from generated trampoline */
627 u64 notrace __bpf_prog_enter(void);
628 void notrace __bpf_prog_exit(struct bpf_prog *prog, u64 start);
629 void notrace __bpf_prog_enter_sleepable(void);
630 void notrace __bpf_prog_exit_sleepable(void);
631 void notrace __bpf_tramp_enter(struct bpf_tramp_image *tr);
632 void notrace __bpf_tramp_exit(struct bpf_tramp_image *tr);
633
634 struct bpf_ksym {
635 unsigned long start;
636 unsigned long end;
637 char name[KSYM_NAME_LEN];
638 struct list_head lnode;
639 struct latch_tree_node tnode;
640 bool prog;
641 };
642
643 enum bpf_tramp_prog_type {
644 BPF_TRAMP_FENTRY,
645 BPF_TRAMP_FEXIT,
646 BPF_TRAMP_MODIFY_RETURN,
647 BPF_TRAMP_MAX,
648 BPF_TRAMP_REPLACE, /* more than MAX */
649 };
650
651 struct bpf_tramp_image {
652 void *image;
653 struct bpf_ksym ksym;
654 struct percpu_ref pcref;
655 void *ip_after_call;
656 void *ip_epilogue;
657 union {
658 struct rcu_head rcu;
659 struct work_struct work;
660 };
661 };
662
663 struct bpf_trampoline {
664 /* hlist for trampoline_table */
665 struct hlist_node hlist;
666 /* serializes access to fields of this trampoline */
667 struct mutex mutex;
668 refcount_t refcnt;
669 u64 key;
670 struct {
671 struct btf_func_model model;
672 void *addr;
673 bool ftrace_managed;
674 } func;
675 /* if !NULL this is BPF_PROG_TYPE_EXT program that extends another BPF
676 * program by replacing one of its functions. func.addr is the address
677 * of the function it replaced.
678 */
679 struct bpf_prog *extension_prog;
680 /* list of BPF programs using this trampoline */
681 struct hlist_head progs_hlist[BPF_TRAMP_MAX];
682 /* Number of attached programs. A counter per kind. */
683 int progs_cnt[BPF_TRAMP_MAX];
684 /* Executable image of trampoline */
685 struct bpf_tramp_image *cur_image;
686 u64 selector;
687 };
688
689 struct bpf_attach_target_info {
690 struct btf_func_model fmodel;
691 long tgt_addr;
692 const char *tgt_name;
693 const struct btf_type *tgt_type;
694 };
695
696 #define BPF_DISPATCHER_MAX 48 /* Fits in 2048B */
697
698 struct bpf_dispatcher_prog {
699 struct bpf_prog *prog;
700 refcount_t users;
701 };
702
703 struct bpf_dispatcher {
704 /* dispatcher mutex */
705 struct mutex mutex;
706 void *func;
707 struct bpf_dispatcher_prog progs[BPF_DISPATCHER_MAX];
708 int num_progs;
709 void *image;
710 u32 image_off;
711 struct bpf_ksym ksym;
712 };
713
bpf_dispatcher_nop_func(const void * ctx,const struct bpf_insn * insnsi,unsigned int (* bpf_func)(const void *,const struct bpf_insn *))714 static __always_inline __nocfi unsigned int bpf_dispatcher_nop_func(
715 const void *ctx,
716 const struct bpf_insn *insnsi,
717 unsigned int (*bpf_func)(const void *,
718 const struct bpf_insn *))
719 {
720 return bpf_func(ctx, insnsi);
721 }
722 #ifdef CONFIG_BPF_JIT
723 int bpf_trampoline_link_prog(struct bpf_prog *prog, struct bpf_trampoline *tr);
724 int bpf_trampoline_unlink_prog(struct bpf_prog *prog, struct bpf_trampoline *tr);
725 struct bpf_trampoline *bpf_trampoline_get(u64 key,
726 struct bpf_attach_target_info *tgt_info);
727 void bpf_trampoline_put(struct bpf_trampoline *tr);
728 int arch_prepare_bpf_dispatcher(void *image, s64 *funcs, int num_funcs);
729 #define BPF_DISPATCHER_INIT(_name) { \
730 .mutex = __MUTEX_INITIALIZER(_name.mutex), \
731 .func = &_name##_func, \
732 .progs = {}, \
733 .num_progs = 0, \
734 .image = NULL, \
735 .image_off = 0, \
736 .ksym = { \
737 .name = #_name, \
738 .lnode = LIST_HEAD_INIT(_name.ksym.lnode), \
739 }, \
740 }
741
742 #define DEFINE_BPF_DISPATCHER(name) \
743 noinline __nocfi unsigned int bpf_dispatcher_##name##_func( \
744 const void *ctx, \
745 const struct bpf_insn *insnsi, \
746 unsigned int (*bpf_func)(const void *, \
747 const struct bpf_insn *)) \
748 { \
749 return bpf_func(ctx, insnsi); \
750 } \
751 EXPORT_SYMBOL(bpf_dispatcher_##name##_func); \
752 struct bpf_dispatcher bpf_dispatcher_##name = \
753 BPF_DISPATCHER_INIT(bpf_dispatcher_##name);
754 #define DECLARE_BPF_DISPATCHER(name) \
755 unsigned int bpf_dispatcher_##name##_func( \
756 const void *ctx, \
757 const struct bpf_insn *insnsi, \
758 unsigned int (*bpf_func)(const void *, \
759 const struct bpf_insn *)); \
760 extern struct bpf_dispatcher bpf_dispatcher_##name;
761 #define BPF_DISPATCHER_FUNC(name) bpf_dispatcher_##name##_func
762 #define BPF_DISPATCHER_PTR(name) (&bpf_dispatcher_##name)
763 void bpf_dispatcher_change_prog(struct bpf_dispatcher *d, struct bpf_prog *from,
764 struct bpf_prog *to);
765 /* Called only from JIT-enabled code, so there's no need for stubs. */
766 void *bpf_jit_alloc_exec_page(void);
767 void bpf_image_ksym_add(void *data, struct bpf_ksym *ksym);
768 void bpf_image_ksym_del(struct bpf_ksym *ksym);
769 void bpf_ksym_add(struct bpf_ksym *ksym);
770 void bpf_ksym_del(struct bpf_ksym *ksym);
771 int bpf_jit_charge_modmem(u32 pages);
772 void bpf_jit_uncharge_modmem(u32 pages);
773 #else
bpf_trampoline_link_prog(struct bpf_prog * prog,struct bpf_trampoline * tr)774 static inline int bpf_trampoline_link_prog(struct bpf_prog *prog,
775 struct bpf_trampoline *tr)
776 {
777 return -ENOTSUPP;
778 }
bpf_trampoline_unlink_prog(struct bpf_prog * prog,struct bpf_trampoline * tr)779 static inline int bpf_trampoline_unlink_prog(struct bpf_prog *prog,
780 struct bpf_trampoline *tr)
781 {
782 return -ENOTSUPP;
783 }
bpf_trampoline_get(u64 key,struct bpf_attach_target_info * tgt_info)784 static inline struct bpf_trampoline *bpf_trampoline_get(u64 key,
785 struct bpf_attach_target_info *tgt_info)
786 {
787 return ERR_PTR(-EOPNOTSUPP);
788 }
bpf_trampoline_put(struct bpf_trampoline * tr)789 static inline void bpf_trampoline_put(struct bpf_trampoline *tr) {}
790 #define DEFINE_BPF_DISPATCHER(name)
791 #define DECLARE_BPF_DISPATCHER(name)
792 #define BPF_DISPATCHER_FUNC(name) bpf_dispatcher_nop_func
793 #define BPF_DISPATCHER_PTR(name) NULL
bpf_dispatcher_change_prog(struct bpf_dispatcher * d,struct bpf_prog * from,struct bpf_prog * to)794 static inline void bpf_dispatcher_change_prog(struct bpf_dispatcher *d,
795 struct bpf_prog *from,
796 struct bpf_prog *to) {}
is_bpf_image_address(unsigned long address)797 static inline bool is_bpf_image_address(unsigned long address)
798 {
799 return false;
800 }
801 #endif
802
803 struct bpf_func_info_aux {
804 u16 linkage;
805 bool unreliable;
806 };
807
808 enum bpf_jit_poke_reason {
809 BPF_POKE_REASON_TAIL_CALL,
810 };
811
812 /* Descriptor of pokes pointing /into/ the JITed image. */
813 struct bpf_jit_poke_descriptor {
814 void *tailcall_target;
815 void *tailcall_bypass;
816 void *bypass_addr;
817 void *aux;
818 union {
819 struct {
820 struct bpf_map *map;
821 u32 key;
822 } tail_call;
823 };
824 bool tailcall_target_stable;
825 u8 adj_off;
826 u16 reason;
827 u32 insn_idx;
828 };
829
830 /* reg_type info for ctx arguments */
831 struct bpf_ctx_arg_aux {
832 u32 offset;
833 enum bpf_reg_type reg_type;
834 u32 btf_id;
835 };
836
837 struct bpf_prog_aux {
838 atomic64_t refcnt;
839 u32 used_map_cnt;
840 u32 max_ctx_offset;
841 u32 max_pkt_offset;
842 u32 max_tp_access;
843 u32 stack_depth;
844 u32 id;
845 u32 func_cnt; /* used by non-func prog as the number of func progs */
846 u32 func_idx; /* 0 for non-func prog, the index in func array for func prog */
847 u32 attach_btf_id; /* in-kernel BTF type id to attach to */
848 u32 ctx_arg_info_size;
849 u32 max_rdonly_access;
850 u32 max_rdwr_access;
851 const struct bpf_ctx_arg_aux *ctx_arg_info;
852 struct mutex dst_mutex; /* protects dst_* pointers below, *after* prog becomes visible */
853 struct bpf_prog *dst_prog;
854 struct bpf_trampoline *dst_trampoline;
855 enum bpf_prog_type saved_dst_prog_type;
856 enum bpf_attach_type saved_dst_attach_type;
857 bool verifier_zext; /* Zero extensions has been inserted by verifier. */
858 bool offload_requested;
859 bool attach_btf_trace; /* true if attaching to BTF-enabled raw tp */
860 bool func_proto_unreliable;
861 bool sleepable;
862 bool tail_call_reachable;
863 struct hlist_node tramp_hlist;
864 /* BTF_KIND_FUNC_PROTO for valid attach_btf_id */
865 const struct btf_type *attach_func_proto;
866 /* function name for valid attach_btf_id */
867 const char *attach_func_name;
868 struct bpf_prog **func;
869 void *jit_data; /* JIT specific data. arch dependent */
870 struct bpf_jit_poke_descriptor *poke_tab;
871 u32 size_poke_tab;
872 struct bpf_ksym ksym;
873 const struct bpf_prog_ops *ops;
874 struct bpf_map **used_maps;
875 struct mutex used_maps_mutex; /* mutex for used_maps and used_map_cnt */
876 struct bpf_prog *prog;
877 struct user_struct *user;
878 u64 load_time; /* ns since boottime */
879 struct bpf_map *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE];
880 char name[BPF_OBJ_NAME_LEN];
881 #ifdef CONFIG_SECURITY
882 void *security;
883 #endif
884 struct bpf_prog_offload *offload;
885 struct btf *btf;
886 struct bpf_func_info *func_info;
887 struct bpf_func_info_aux *func_info_aux;
888 /* bpf_line_info loaded from userspace. linfo->insn_off
889 * has the xlated insn offset.
890 * Both the main and sub prog share the same linfo.
891 * The subprog can access its first linfo by
892 * using the linfo_idx.
893 */
894 struct bpf_line_info *linfo;
895 /* jited_linfo is the jited addr of the linfo. It has a
896 * one to one mapping to linfo:
897 * jited_linfo[i] is the jited addr for the linfo[i]->insn_off.
898 * Both the main and sub prog share the same jited_linfo.
899 * The subprog can access its first jited_linfo by
900 * using the linfo_idx.
901 */
902 void **jited_linfo;
903 u32 func_info_cnt;
904 u32 nr_linfo;
905 /* subprog can use linfo_idx to access its first linfo and
906 * jited_linfo.
907 * main prog always has linfo_idx == 0
908 */
909 u32 linfo_idx;
910 u32 num_exentries;
911 struct exception_table_entry *extable;
912 struct bpf_prog_stats __percpu *stats;
913 union {
914 struct work_struct work;
915 struct rcu_head rcu;
916 };
917 };
918
919 struct bpf_array_aux {
920 /* 'Ownership' of prog array is claimed by the first program that
921 * is going to use this map or by the first program which FD is
922 * stored in the map to make sure that all callers and callees have
923 * the same prog type and JITed flag.
924 */
925 struct {
926 spinlock_t lock;
927 enum bpf_prog_type type;
928 bool jited;
929 } owner;
930 /* Programs with direct jumps into programs part of this array. */
931 struct list_head poke_progs;
932 struct bpf_map *map;
933 struct mutex poke_mutex;
934 struct work_struct work;
935 };
936
937 struct bpf_link {
938 atomic64_t refcnt;
939 u32 id;
940 enum bpf_link_type type;
941 const struct bpf_link_ops *ops;
942 struct bpf_prog *prog;
943 struct work_struct work;
944 };
945
946 struct bpf_link_ops {
947 void (*release)(struct bpf_link *link);
948 void (*dealloc)(struct bpf_link *link);
949 int (*detach)(struct bpf_link *link);
950 int (*update_prog)(struct bpf_link *link, struct bpf_prog *new_prog,
951 struct bpf_prog *old_prog);
952 void (*show_fdinfo)(const struct bpf_link *link, struct seq_file *seq);
953 int (*fill_link_info)(const struct bpf_link *link,
954 struct bpf_link_info *info);
955 };
956
957 struct bpf_link_primer {
958 struct bpf_link *link;
959 struct file *file;
960 int fd;
961 u32 id;
962 };
963
964 struct bpf_struct_ops_value;
965 struct btf_type;
966 struct btf_member;
967
968 #define BPF_STRUCT_OPS_MAX_NR_MEMBERS 64
969 struct bpf_struct_ops {
970 const struct bpf_verifier_ops *verifier_ops;
971 int (*init)(struct btf *btf);
972 int (*check_member)(const struct btf_type *t,
973 const struct btf_member *member);
974 int (*init_member)(const struct btf_type *t,
975 const struct btf_member *member,
976 void *kdata, const void *udata);
977 int (*reg)(void *kdata);
978 void (*unreg)(void *kdata);
979 const struct btf_type *type;
980 const struct btf_type *value_type;
981 const char *name;
982 struct btf_func_model func_models[BPF_STRUCT_OPS_MAX_NR_MEMBERS];
983 u32 type_id;
984 u32 value_id;
985 };
986
987 #if defined(CONFIG_BPF_JIT) && defined(CONFIG_BPF_SYSCALL)
988 #define BPF_MODULE_OWNER ((void *)((0xeB9FUL << 2) + POISON_POINTER_DELTA))
989 const struct bpf_struct_ops *bpf_struct_ops_find(u32 type_id);
990 void bpf_struct_ops_init(struct btf *btf, struct bpf_verifier_log *log);
991 bool bpf_struct_ops_get(const void *kdata);
992 void bpf_struct_ops_put(const void *kdata);
993 int bpf_struct_ops_map_sys_lookup_elem(struct bpf_map *map, void *key,
994 void *value);
bpf_try_module_get(const void * data,struct module * owner)995 static inline bool bpf_try_module_get(const void *data, struct module *owner)
996 {
997 if (owner == BPF_MODULE_OWNER)
998 return bpf_struct_ops_get(data);
999 else
1000 return try_module_get(owner);
1001 }
bpf_module_put(const void * data,struct module * owner)1002 static inline void bpf_module_put(const void *data, struct module *owner)
1003 {
1004 if (owner == BPF_MODULE_OWNER)
1005 bpf_struct_ops_put(data);
1006 else
1007 module_put(owner);
1008 }
1009 #else
bpf_struct_ops_find(u32 type_id)1010 static inline const struct bpf_struct_ops *bpf_struct_ops_find(u32 type_id)
1011 {
1012 return NULL;
1013 }
bpf_struct_ops_init(struct btf * btf,struct bpf_verifier_log * log)1014 static inline void bpf_struct_ops_init(struct btf *btf,
1015 struct bpf_verifier_log *log)
1016 {
1017 }
bpf_try_module_get(const void * data,struct module * owner)1018 static inline bool bpf_try_module_get(const void *data, struct module *owner)
1019 {
1020 return try_module_get(owner);
1021 }
bpf_module_put(const void * data,struct module * owner)1022 static inline void bpf_module_put(const void *data, struct module *owner)
1023 {
1024 module_put(owner);
1025 }
bpf_struct_ops_map_sys_lookup_elem(struct bpf_map * map,void * key,void * value)1026 static inline int bpf_struct_ops_map_sys_lookup_elem(struct bpf_map *map,
1027 void *key,
1028 void *value)
1029 {
1030 return -EINVAL;
1031 }
1032 #endif
1033
1034 struct bpf_array {
1035 struct bpf_map map;
1036 u32 elem_size;
1037 u32 index_mask;
1038 struct bpf_array_aux *aux;
1039 union {
1040 char value[0] __aligned(8);
1041 void *ptrs[0] __aligned(8);
1042 void __percpu *pptrs[0] __aligned(8);
1043 };
1044 };
1045
1046 #define BPF_COMPLEXITY_LIMIT_INSNS 1000000 /* yes. 1M insns */
1047 #define MAX_TAIL_CALL_CNT 32
1048
1049 #define BPF_F_ACCESS_MASK (BPF_F_RDONLY | \
1050 BPF_F_RDONLY_PROG | \
1051 BPF_F_WRONLY | \
1052 BPF_F_WRONLY_PROG)
1053
1054 #define BPF_MAP_CAN_READ BIT(0)
1055 #define BPF_MAP_CAN_WRITE BIT(1)
1056
bpf_map_flags_to_cap(struct bpf_map * map)1057 static inline u32 bpf_map_flags_to_cap(struct bpf_map *map)
1058 {
1059 u32 access_flags = map->map_flags & (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG);
1060
1061 /* Combination of BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG is
1062 * not possible.
1063 */
1064 if (access_flags & BPF_F_RDONLY_PROG)
1065 return BPF_MAP_CAN_READ;
1066 else if (access_flags & BPF_F_WRONLY_PROG)
1067 return BPF_MAP_CAN_WRITE;
1068 else
1069 return BPF_MAP_CAN_READ | BPF_MAP_CAN_WRITE;
1070 }
1071
bpf_map_flags_access_ok(u32 access_flags)1072 static inline bool bpf_map_flags_access_ok(u32 access_flags)
1073 {
1074 return (access_flags & (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG)) !=
1075 (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG);
1076 }
1077
1078 struct bpf_event_entry {
1079 struct perf_event *event;
1080 struct file *perf_file;
1081 struct file *map_file;
1082 struct rcu_head rcu;
1083 };
1084
1085 bool bpf_prog_array_compatible(struct bpf_array *array, const struct bpf_prog *fp);
1086 int bpf_prog_calc_tag(struct bpf_prog *fp);
1087 const char *kernel_type_name(u32 btf_type_id);
1088
1089 const struct bpf_func_proto *bpf_get_trace_printk_proto(void);
1090
1091 typedef unsigned long (*bpf_ctx_copy_t)(void *dst, const void *src,
1092 unsigned long off, unsigned long len);
1093 typedef u32 (*bpf_convert_ctx_access_t)(enum bpf_access_type type,
1094 const struct bpf_insn *src,
1095 struct bpf_insn *dst,
1096 struct bpf_prog *prog,
1097 u32 *target_size);
1098
1099 u64 bpf_event_output(struct bpf_map *map, u64 flags, void *meta, u64 meta_size,
1100 void *ctx, u64 ctx_size, bpf_ctx_copy_t ctx_copy);
1101
1102 /* an array of programs to be executed under rcu_lock.
1103 *
1104 * Typical usage:
1105 * ret = BPF_PROG_RUN_ARRAY(&bpf_prog_array, ctx, BPF_PROG_RUN);
1106 *
1107 * the structure returned by bpf_prog_array_alloc() should be populated
1108 * with program pointers and the last pointer must be NULL.
1109 * The user has to keep refcnt on the program and make sure the program
1110 * is removed from the array before bpf_prog_put().
1111 * The 'struct bpf_prog_array *' should only be replaced with xchg()
1112 * since other cpus are walking the array of pointers in parallel.
1113 */
1114 struct bpf_prog_array_item {
1115 struct bpf_prog *prog;
1116 struct bpf_cgroup_storage *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE];
1117 };
1118
1119 struct bpf_prog_array {
1120 struct rcu_head rcu;
1121 struct bpf_prog_array_item items[];
1122 };
1123
1124 struct bpf_prog_array *bpf_prog_array_alloc(u32 prog_cnt, gfp_t flags);
1125 void bpf_prog_array_free(struct bpf_prog_array *progs);
1126 int bpf_prog_array_length(struct bpf_prog_array *progs);
1127 bool bpf_prog_array_is_empty(struct bpf_prog_array *array);
1128 int bpf_prog_array_copy_to_user(struct bpf_prog_array *progs,
1129 __u32 __user *prog_ids, u32 cnt);
1130
1131 void bpf_prog_array_delete_safe(struct bpf_prog_array *progs,
1132 struct bpf_prog *old_prog);
1133 int bpf_prog_array_delete_safe_at(struct bpf_prog_array *array, int index);
1134 int bpf_prog_array_update_at(struct bpf_prog_array *array, int index,
1135 struct bpf_prog *prog);
1136 int bpf_prog_array_copy_info(struct bpf_prog_array *array,
1137 u32 *prog_ids, u32 request_cnt,
1138 u32 *prog_cnt);
1139 int bpf_prog_array_copy(struct bpf_prog_array *old_array,
1140 struct bpf_prog *exclude_prog,
1141 struct bpf_prog *include_prog,
1142 struct bpf_prog_array **new_array);
1143
1144 struct bpf_run_ctx {};
1145
1146 struct bpf_cg_run_ctx {
1147 struct bpf_run_ctx run_ctx;
1148 struct bpf_prog_array_item *prog_item;
1149 };
1150
1151 #define __BPF_PROG_RUN_ARRAY(array, ctx, func, check_non_null, set_cg_storage) \
1152 ({ \
1153 struct bpf_prog_array_item *_item; \
1154 struct bpf_prog *_prog; \
1155 struct bpf_prog_array *_array; \
1156 struct bpf_run_ctx *old_run_ctx; \
1157 struct bpf_cg_run_ctx run_ctx; \
1158 u32 _ret = 1; \
1159 migrate_disable(); \
1160 rcu_read_lock(); \
1161 _array = rcu_dereference(array); \
1162 if (unlikely(check_non_null && !_array))\
1163 goto _out; \
1164 _item = &_array->items[0]; \
1165 old_run_ctx = bpf_set_run_ctx(&run_ctx.run_ctx);\
1166 while ((_prog = READ_ONCE(_item->prog))) { \
1167 run_ctx.prog_item = _item; \
1168 _ret &= func(_prog, ctx); \
1169 _item++; \
1170 } \
1171 bpf_reset_run_ctx(old_run_ctx); \
1172 _out: \
1173 rcu_read_unlock(); \
1174 migrate_enable(); \
1175 _ret; \
1176 })
1177
1178 /* To be used by __cgroup_bpf_run_filter_skb for EGRESS BPF progs
1179 * so BPF programs can request cwr for TCP packets.
1180 *
1181 * Current cgroup skb programs can only return 0 or 1 (0 to drop the
1182 * packet. This macro changes the behavior so the low order bit
1183 * indicates whether the packet should be dropped (0) or not (1)
1184 * and the next bit is a congestion notification bit. This could be
1185 * used by TCP to call tcp_enter_cwr()
1186 *
1187 * Hence, new allowed return values of CGROUP EGRESS BPF programs are:
1188 * 0: drop packet
1189 * 1: keep packet
1190 * 2: drop packet and cn
1191 * 3: keep packet and cn
1192 *
1193 * This macro then converts it to one of the NET_XMIT or an error
1194 * code that is then interpreted as drop packet (and no cn):
1195 * 0: NET_XMIT_SUCCESS skb should be transmitted
1196 * 1: NET_XMIT_DROP skb should be dropped and cn
1197 * 2: NET_XMIT_CN skb should be transmitted and cn
1198 * 3: -EPERM skb should be dropped
1199 */
1200 #define BPF_PROG_CGROUP_INET_EGRESS_RUN_ARRAY(array, ctx, func) \
1201 ({ \
1202 struct bpf_prog_array_item *_item; \
1203 struct bpf_prog *_prog; \
1204 struct bpf_prog_array *_array; \
1205 struct bpf_run_ctx *old_run_ctx; \
1206 struct bpf_cg_run_ctx run_ctx; \
1207 u32 ret; \
1208 u32 _ret = 1; \
1209 u32 _cn = 0; \
1210 migrate_disable(); \
1211 rcu_read_lock(); \
1212 _array = rcu_dereference(array); \
1213 _item = &_array->items[0]; \
1214 old_run_ctx = bpf_set_run_ctx(&run_ctx.run_ctx); \
1215 while ((_prog = READ_ONCE(_item->prog))) { \
1216 run_ctx.prog_item = _item; \
1217 ret = func(_prog, ctx); \
1218 _ret &= (ret & 1); \
1219 _cn |= (ret & 2); \
1220 _item++; \
1221 } \
1222 bpf_reset_run_ctx(old_run_ctx); \
1223 rcu_read_unlock(); \
1224 migrate_enable(); \
1225 if (_ret) \
1226 _ret = (_cn ? NET_XMIT_CN : NET_XMIT_SUCCESS); \
1227 else \
1228 _ret = (_cn ? NET_XMIT_DROP : -EPERM); \
1229 _ret; \
1230 })
1231
1232 #define BPF_PROG_RUN_ARRAY(array, ctx, func) \
1233 __BPF_PROG_RUN_ARRAY(array, ctx, func, false, true)
1234
1235 #define BPF_PROG_RUN_ARRAY_CHECK(array, ctx, func) \
1236 __BPF_PROG_RUN_ARRAY(array, ctx, func, true, false)
1237
1238 #ifdef CONFIG_BPF_SYSCALL
1239 DECLARE_PER_CPU(int, bpf_prog_active);
1240 extern struct mutex bpf_stats_enabled_mutex;
1241
1242 /*
1243 * Block execution of BPF programs attached to instrumentation (perf,
1244 * kprobes, tracepoints) to prevent deadlocks on map operations as any of
1245 * these events can happen inside a region which holds a map bucket lock
1246 * and can deadlock on it.
1247 *
1248 * Use the preemption safe inc/dec variants on RT because migrate disable
1249 * is preemptible on RT and preemption in the middle of the RMW operation
1250 * might lead to inconsistent state. Use the raw variants for non RT
1251 * kernels as migrate_disable() maps to preempt_disable() so the slightly
1252 * more expensive save operation can be avoided.
1253 */
bpf_disable_instrumentation(void)1254 static inline void bpf_disable_instrumentation(void)
1255 {
1256 migrate_disable();
1257 if (IS_ENABLED(CONFIG_PREEMPT_RT))
1258 this_cpu_inc(bpf_prog_active);
1259 else
1260 __this_cpu_inc(bpf_prog_active);
1261 }
1262
bpf_enable_instrumentation(void)1263 static inline void bpf_enable_instrumentation(void)
1264 {
1265 if (IS_ENABLED(CONFIG_PREEMPT_RT))
1266 this_cpu_dec(bpf_prog_active);
1267 else
1268 __this_cpu_dec(bpf_prog_active);
1269 migrate_enable();
1270 }
1271
bpf_set_run_ctx(struct bpf_run_ctx * new_ctx)1272 static inline struct bpf_run_ctx *bpf_set_run_ctx(struct bpf_run_ctx *new_ctx)
1273 {
1274 struct bpf_run_ctx *old_ctx;
1275
1276 old_ctx = current->bpf_ctx;
1277 current->bpf_ctx = new_ctx;
1278 return old_ctx;
1279 }
1280
bpf_reset_run_ctx(struct bpf_run_ctx * old_ctx)1281 static inline void bpf_reset_run_ctx(struct bpf_run_ctx *old_ctx)
1282 {
1283 current->bpf_ctx = old_ctx;
1284 }
1285
1286 extern const struct file_operations bpf_map_fops;
1287 extern const struct file_operations bpf_prog_fops;
1288 extern const struct file_operations bpf_iter_fops;
1289
1290 #define BPF_PROG_TYPE(_id, _name, prog_ctx_type, kern_ctx_type) \
1291 extern const struct bpf_prog_ops _name ## _prog_ops; \
1292 extern const struct bpf_verifier_ops _name ## _verifier_ops;
1293 #define BPF_MAP_TYPE(_id, _ops) \
1294 extern const struct bpf_map_ops _ops;
1295 #define BPF_LINK_TYPE(_id, _name)
1296 #include <linux/bpf_types.h>
1297 #undef BPF_PROG_TYPE
1298 #undef BPF_MAP_TYPE
1299 #undef BPF_LINK_TYPE
1300
1301 extern const struct bpf_prog_ops bpf_offload_prog_ops;
1302 extern const struct bpf_verifier_ops tc_cls_act_analyzer_ops;
1303 extern const struct bpf_verifier_ops xdp_analyzer_ops;
1304
1305 struct bpf_prog *bpf_prog_get(u32 ufd);
1306 struct bpf_prog *bpf_prog_get_type_dev(u32 ufd, enum bpf_prog_type type,
1307 bool attach_drv);
1308 void bpf_prog_add(struct bpf_prog *prog, int i);
1309 void bpf_prog_sub(struct bpf_prog *prog, int i);
1310 void bpf_prog_inc(struct bpf_prog *prog);
1311 struct bpf_prog * __must_check bpf_prog_inc_not_zero(struct bpf_prog *prog);
1312 void bpf_prog_put(struct bpf_prog *prog);
1313 int __bpf_prog_charge(struct user_struct *user, u32 pages);
1314 void __bpf_prog_uncharge(struct user_struct *user, u32 pages);
1315
1316 void bpf_prog_free_id(struct bpf_prog *prog, bool do_idr_lock);
1317 void bpf_map_free_id(struct bpf_map *map, bool do_idr_lock);
1318
1319 struct bpf_map *bpf_map_get(u32 ufd);
1320 struct bpf_map *bpf_map_get_with_uref(u32 ufd);
1321 struct bpf_map *__bpf_map_get(struct fd f);
1322 void bpf_map_inc(struct bpf_map *map);
1323 void bpf_map_inc_with_uref(struct bpf_map *map);
1324 struct bpf_map * __must_check bpf_map_inc_not_zero(struct bpf_map *map);
1325 void bpf_map_put_with_uref(struct bpf_map *map);
1326 void bpf_map_put(struct bpf_map *map);
1327 int bpf_map_charge_memlock(struct bpf_map *map, u32 pages);
1328 void bpf_map_uncharge_memlock(struct bpf_map *map, u32 pages);
1329 int bpf_map_charge_init(struct bpf_map_memory *mem, u64 size);
1330 void bpf_map_charge_finish(struct bpf_map_memory *mem);
1331 void bpf_map_charge_move(struct bpf_map_memory *dst,
1332 struct bpf_map_memory *src);
1333 void *bpf_map_area_alloc(u64 size, int numa_node);
1334 void *bpf_map_area_mmapable_alloc(u64 size, int numa_node);
1335 void bpf_map_area_free(void *base);
1336 bool bpf_map_write_active(const struct bpf_map *map);
1337 void bpf_map_init_from_attr(struct bpf_map *map, union bpf_attr *attr);
1338 int generic_map_lookup_batch(struct bpf_map *map,
1339 const union bpf_attr *attr,
1340 union bpf_attr __user *uattr);
1341 int generic_map_update_batch(struct bpf_map *map,
1342 const union bpf_attr *attr,
1343 union bpf_attr __user *uattr);
1344 int generic_map_delete_batch(struct bpf_map *map,
1345 const union bpf_attr *attr,
1346 union bpf_attr __user *uattr);
1347 struct bpf_map *bpf_map_get_curr_or_next(u32 *id);
1348 struct bpf_prog *bpf_prog_get_curr_or_next(u32 *id);
1349
1350 extern int sysctl_unprivileged_bpf_disabled;
1351
bpf_allow_ptr_leaks(void)1352 static inline bool bpf_allow_ptr_leaks(void)
1353 {
1354 return perfmon_capable();
1355 }
1356
bpf_allow_uninit_stack(void)1357 static inline bool bpf_allow_uninit_stack(void)
1358 {
1359 return perfmon_capable();
1360 }
1361
bpf_allow_ptr_to_map_access(void)1362 static inline bool bpf_allow_ptr_to_map_access(void)
1363 {
1364 return perfmon_capable();
1365 }
1366
bpf_bypass_spec_v1(void)1367 static inline bool bpf_bypass_spec_v1(void)
1368 {
1369 return perfmon_capable();
1370 }
1371
bpf_bypass_spec_v4(void)1372 static inline bool bpf_bypass_spec_v4(void)
1373 {
1374 return perfmon_capable();
1375 }
1376
1377 int bpf_map_new_fd(struct bpf_map *map, int flags);
1378 int bpf_prog_new_fd(struct bpf_prog *prog);
1379
1380 void bpf_link_init(struct bpf_link *link, enum bpf_link_type type,
1381 const struct bpf_link_ops *ops, struct bpf_prog *prog);
1382 int bpf_link_prime(struct bpf_link *link, struct bpf_link_primer *primer);
1383 int bpf_link_settle(struct bpf_link_primer *primer);
1384 void bpf_link_cleanup(struct bpf_link_primer *primer);
1385 void bpf_link_inc(struct bpf_link *link);
1386 void bpf_link_put(struct bpf_link *link);
1387 int bpf_link_new_fd(struct bpf_link *link);
1388 struct file *bpf_link_new_file(struct bpf_link *link, int *reserved_fd);
1389 struct bpf_link *bpf_link_get_from_fd(u32 ufd);
1390
1391 int bpf_obj_pin_user(u32 ufd, const char __user *pathname);
1392 int bpf_obj_get_user(const char __user *pathname, int flags);
1393
1394 #define BPF_ITER_FUNC_PREFIX "bpf_iter_"
1395 #define DEFINE_BPF_ITER_FUNC(target, args...) \
1396 extern int bpf_iter_ ## target(args); \
1397 int __init bpf_iter_ ## target(args) { return 0; }
1398
1399 struct bpf_iter_aux_info {
1400 struct bpf_map *map;
1401 };
1402
1403 typedef int (*bpf_iter_attach_target_t)(struct bpf_prog *prog,
1404 union bpf_iter_link_info *linfo,
1405 struct bpf_iter_aux_info *aux);
1406 typedef void (*bpf_iter_detach_target_t)(struct bpf_iter_aux_info *aux);
1407 typedef void (*bpf_iter_show_fdinfo_t) (const struct bpf_iter_aux_info *aux,
1408 struct seq_file *seq);
1409 typedef int (*bpf_iter_fill_link_info_t)(const struct bpf_iter_aux_info *aux,
1410 struct bpf_link_info *info);
1411
1412 #define BPF_ITER_CTX_ARG_MAX 2
1413 struct bpf_iter_reg {
1414 const char *target;
1415 bpf_iter_attach_target_t attach_target;
1416 bpf_iter_detach_target_t detach_target;
1417 bpf_iter_show_fdinfo_t show_fdinfo;
1418 bpf_iter_fill_link_info_t fill_link_info;
1419 u32 ctx_arg_info_size;
1420 struct bpf_ctx_arg_aux ctx_arg_info[BPF_ITER_CTX_ARG_MAX];
1421 const struct bpf_iter_seq_info *seq_info;
1422 };
1423
1424 struct bpf_iter_meta {
1425 __bpf_md_ptr(struct seq_file *, seq);
1426 u64 session_id;
1427 u64 seq_num;
1428 };
1429
1430 struct bpf_iter__bpf_map_elem {
1431 __bpf_md_ptr(struct bpf_iter_meta *, meta);
1432 __bpf_md_ptr(struct bpf_map *, map);
1433 __bpf_md_ptr(void *, key);
1434 __bpf_md_ptr(void *, value);
1435 };
1436
1437 int bpf_iter_reg_target(const struct bpf_iter_reg *reg_info);
1438 void bpf_iter_unreg_target(const struct bpf_iter_reg *reg_info);
1439 bool bpf_iter_prog_supported(struct bpf_prog *prog);
1440 int bpf_iter_link_attach(const union bpf_attr *attr, struct bpf_prog *prog);
1441 int bpf_iter_new_fd(struct bpf_link *link);
1442 bool bpf_link_is_iter(struct bpf_link *link);
1443 struct bpf_prog *bpf_iter_get_info(struct bpf_iter_meta *meta, bool in_stop);
1444 int bpf_iter_run_prog(struct bpf_prog *prog, void *ctx);
1445 void bpf_iter_map_show_fdinfo(const struct bpf_iter_aux_info *aux,
1446 struct seq_file *seq);
1447 int bpf_iter_map_fill_link_info(const struct bpf_iter_aux_info *aux,
1448 struct bpf_link_info *info);
1449
1450 int bpf_percpu_hash_copy(struct bpf_map *map, void *key, void *value);
1451 int bpf_percpu_array_copy(struct bpf_map *map, void *key, void *value);
1452 int bpf_percpu_hash_update(struct bpf_map *map, void *key, void *value,
1453 u64 flags);
1454 int bpf_percpu_array_update(struct bpf_map *map, void *key, void *value,
1455 u64 flags);
1456
1457 int bpf_stackmap_copy(struct bpf_map *map, void *key, void *value);
1458
1459 int bpf_fd_array_map_update_elem(struct bpf_map *map, struct file *map_file,
1460 void *key, void *value, u64 map_flags);
1461 int bpf_fd_array_map_lookup_elem(struct bpf_map *map, void *key, u32 *value);
1462 int bpf_fd_htab_map_update_elem(struct bpf_map *map, struct file *map_file,
1463 void *key, void *value, u64 map_flags);
1464 int bpf_fd_htab_map_lookup_elem(struct bpf_map *map, void *key, u32 *value);
1465
1466 int bpf_get_file_flag(int flags);
1467 int bpf_check_uarg_tail_zero(void __user *uaddr, size_t expected_size,
1468 size_t actual_size);
1469
1470 /* memcpy that is used with 8-byte aligned pointers, power-of-8 size and
1471 * forced to use 'long' read/writes to try to atomically copy long counters.
1472 * Best-effort only. No barriers here, since it _will_ race with concurrent
1473 * updates from BPF programs. Called from bpf syscall and mostly used with
1474 * size 8 or 16 bytes, so ask compiler to inline it.
1475 */
bpf_long_memcpy(void * dst,const void * src,u32 size)1476 static inline void bpf_long_memcpy(void *dst, const void *src, u32 size)
1477 {
1478 const long *lsrc = src;
1479 long *ldst = dst;
1480
1481 size /= sizeof(long);
1482 while (size--)
1483 data_race(*ldst++ = *lsrc++);
1484 }
1485
1486 /* verify correctness of eBPF program */
1487 int bpf_check(struct bpf_prog **fp, union bpf_attr *attr,
1488 union bpf_attr __user *uattr);
1489
1490 #ifndef CONFIG_BPF_JIT_ALWAYS_ON
1491 void bpf_patch_call_args(struct bpf_insn *insn, u32 stack_depth);
1492 #endif
1493
1494 struct btf *bpf_get_btf_vmlinux(void);
1495
1496 /* Map specifics */
1497 struct xdp_buff;
1498 struct sk_buff;
1499
1500 struct bpf_dtab_netdev *__dev_map_lookup_elem(struct bpf_map *map, u32 key);
1501 struct bpf_dtab_netdev *__dev_map_hash_lookup_elem(struct bpf_map *map, u32 key);
1502 void __dev_flush(void);
1503 int dev_xdp_enqueue(struct net_device *dev, struct xdp_buff *xdp,
1504 struct net_device *dev_rx);
1505 int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp,
1506 struct net_device *dev_rx);
1507 int dev_map_generic_redirect(struct bpf_dtab_netdev *dst, struct sk_buff *skb,
1508 struct bpf_prog *xdp_prog);
1509 bool dev_map_can_have_prog(struct bpf_map *map);
1510
1511 struct bpf_cpu_map_entry *__cpu_map_lookup_elem(struct bpf_map *map, u32 key);
1512 void __cpu_map_flush(void);
1513 int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu, struct xdp_buff *xdp,
1514 struct net_device *dev_rx);
1515 bool cpu_map_prog_allowed(struct bpf_map *map);
1516
1517 /* Return map's numa specified by userspace */
bpf_map_attr_numa_node(const union bpf_attr * attr)1518 static inline int bpf_map_attr_numa_node(const union bpf_attr *attr)
1519 {
1520 return (attr->map_flags & BPF_F_NUMA_NODE) ?
1521 attr->numa_node : NUMA_NO_NODE;
1522 }
1523
1524 struct bpf_prog *bpf_prog_get_type_path(const char *name, enum bpf_prog_type type);
1525 int array_map_alloc_check(union bpf_attr *attr);
1526
1527 int bpf_prog_test_run_xdp(struct bpf_prog *prog, const union bpf_attr *kattr,
1528 union bpf_attr __user *uattr);
1529 int bpf_prog_test_run_skb(struct bpf_prog *prog, const union bpf_attr *kattr,
1530 union bpf_attr __user *uattr);
1531 int bpf_prog_test_run_tracing(struct bpf_prog *prog,
1532 const union bpf_attr *kattr,
1533 union bpf_attr __user *uattr);
1534 int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog,
1535 const union bpf_attr *kattr,
1536 union bpf_attr __user *uattr);
1537 int bpf_prog_test_run_raw_tp(struct bpf_prog *prog,
1538 const union bpf_attr *kattr,
1539 union bpf_attr __user *uattr);
1540 bool btf_ctx_access(int off, int size, enum bpf_access_type type,
1541 const struct bpf_prog *prog,
1542 struct bpf_insn_access_aux *info);
1543 int btf_struct_access(struct bpf_verifier_log *log,
1544 const struct btf_type *t, int off, int size,
1545 enum bpf_access_type atype,
1546 u32 *next_btf_id);
1547 bool btf_struct_ids_match(struct bpf_verifier_log *log,
1548 int off, u32 id, u32 need_type_id);
1549
1550 int btf_distill_func_proto(struct bpf_verifier_log *log,
1551 struct btf *btf,
1552 const struct btf_type *func_proto,
1553 const char *func_name,
1554 struct btf_func_model *m);
1555
1556 struct bpf_reg_state;
1557 int btf_check_func_arg_match(struct bpf_verifier_env *env, int subprog,
1558 struct bpf_reg_state *regs);
1559 int btf_prepare_func_args(struct bpf_verifier_env *env, int subprog,
1560 struct bpf_reg_state *reg);
1561 int btf_check_type_match(struct bpf_verifier_log *log, const struct bpf_prog *prog,
1562 struct btf *btf, const struct btf_type *t);
1563
1564 struct bpf_prog *bpf_prog_by_id(u32 id);
1565 struct bpf_link *bpf_link_by_id(u32 id);
1566
1567 const struct bpf_func_proto *bpf_base_func_proto(enum bpf_func_id func_id);
1568
unprivileged_ebpf_enabled(void)1569 static inline bool unprivileged_ebpf_enabled(void)
1570 {
1571 return !sysctl_unprivileged_bpf_disabled;
1572 }
1573
1574 #else /* !CONFIG_BPF_SYSCALL */
bpf_prog_get(u32 ufd)1575 static inline struct bpf_prog *bpf_prog_get(u32 ufd)
1576 {
1577 return ERR_PTR(-EOPNOTSUPP);
1578 }
1579
bpf_prog_get_type_dev(u32 ufd,enum bpf_prog_type type,bool attach_drv)1580 static inline struct bpf_prog *bpf_prog_get_type_dev(u32 ufd,
1581 enum bpf_prog_type type,
1582 bool attach_drv)
1583 {
1584 return ERR_PTR(-EOPNOTSUPP);
1585 }
1586
bpf_prog_add(struct bpf_prog * prog,int i)1587 static inline void bpf_prog_add(struct bpf_prog *prog, int i)
1588 {
1589 }
1590
bpf_prog_sub(struct bpf_prog * prog,int i)1591 static inline void bpf_prog_sub(struct bpf_prog *prog, int i)
1592 {
1593 }
1594
bpf_prog_put(struct bpf_prog * prog)1595 static inline void bpf_prog_put(struct bpf_prog *prog)
1596 {
1597 }
1598
bpf_prog_inc(struct bpf_prog * prog)1599 static inline void bpf_prog_inc(struct bpf_prog *prog)
1600 {
1601 }
1602
1603 static inline struct bpf_prog *__must_check
bpf_prog_inc_not_zero(struct bpf_prog * prog)1604 bpf_prog_inc_not_zero(struct bpf_prog *prog)
1605 {
1606 return ERR_PTR(-EOPNOTSUPP);
1607 }
1608
__bpf_prog_charge(struct user_struct * user,u32 pages)1609 static inline int __bpf_prog_charge(struct user_struct *user, u32 pages)
1610 {
1611 return 0;
1612 }
1613
__bpf_prog_uncharge(struct user_struct * user,u32 pages)1614 static inline void __bpf_prog_uncharge(struct user_struct *user, u32 pages)
1615 {
1616 }
1617
bpf_link_init(struct bpf_link * link,enum bpf_link_type type,const struct bpf_link_ops * ops,struct bpf_prog * prog)1618 static inline void bpf_link_init(struct bpf_link *link, enum bpf_link_type type,
1619 const struct bpf_link_ops *ops,
1620 struct bpf_prog *prog)
1621 {
1622 }
1623
bpf_link_prime(struct bpf_link * link,struct bpf_link_primer * primer)1624 static inline int bpf_link_prime(struct bpf_link *link,
1625 struct bpf_link_primer *primer)
1626 {
1627 return -EOPNOTSUPP;
1628 }
1629
bpf_link_settle(struct bpf_link_primer * primer)1630 static inline int bpf_link_settle(struct bpf_link_primer *primer)
1631 {
1632 return -EOPNOTSUPP;
1633 }
1634
bpf_link_cleanup(struct bpf_link_primer * primer)1635 static inline void bpf_link_cleanup(struct bpf_link_primer *primer)
1636 {
1637 }
1638
bpf_link_inc(struct bpf_link * link)1639 static inline void bpf_link_inc(struct bpf_link *link)
1640 {
1641 }
1642
bpf_link_put(struct bpf_link * link)1643 static inline void bpf_link_put(struct bpf_link *link)
1644 {
1645 }
1646
bpf_obj_get_user(const char __user * pathname,int flags)1647 static inline int bpf_obj_get_user(const char __user *pathname, int flags)
1648 {
1649 return -EOPNOTSUPP;
1650 }
1651
__dev_map_lookup_elem(struct bpf_map * map,u32 key)1652 static inline struct net_device *__dev_map_lookup_elem(struct bpf_map *map,
1653 u32 key)
1654 {
1655 return NULL;
1656 }
1657
__dev_map_hash_lookup_elem(struct bpf_map * map,u32 key)1658 static inline struct net_device *__dev_map_hash_lookup_elem(struct bpf_map *map,
1659 u32 key)
1660 {
1661 return NULL;
1662 }
dev_map_can_have_prog(struct bpf_map * map)1663 static inline bool dev_map_can_have_prog(struct bpf_map *map)
1664 {
1665 return false;
1666 }
1667
__dev_flush(void)1668 static inline void __dev_flush(void)
1669 {
1670 }
1671
1672 struct xdp_buff;
1673 struct bpf_dtab_netdev;
1674
1675 static inline
dev_xdp_enqueue(struct net_device * dev,struct xdp_buff * xdp,struct net_device * dev_rx)1676 int dev_xdp_enqueue(struct net_device *dev, struct xdp_buff *xdp,
1677 struct net_device *dev_rx)
1678 {
1679 return 0;
1680 }
1681
1682 static inline
dev_map_enqueue(struct bpf_dtab_netdev * dst,struct xdp_buff * xdp,struct net_device * dev_rx)1683 int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp,
1684 struct net_device *dev_rx)
1685 {
1686 return 0;
1687 }
1688
1689 struct sk_buff;
1690
dev_map_generic_redirect(struct bpf_dtab_netdev * dst,struct sk_buff * skb,struct bpf_prog * xdp_prog)1691 static inline int dev_map_generic_redirect(struct bpf_dtab_netdev *dst,
1692 struct sk_buff *skb,
1693 struct bpf_prog *xdp_prog)
1694 {
1695 return 0;
1696 }
1697
1698 static inline
__cpu_map_lookup_elem(struct bpf_map * map,u32 key)1699 struct bpf_cpu_map_entry *__cpu_map_lookup_elem(struct bpf_map *map, u32 key)
1700 {
1701 return NULL;
1702 }
1703
__cpu_map_flush(void)1704 static inline void __cpu_map_flush(void)
1705 {
1706 }
1707
cpu_map_enqueue(struct bpf_cpu_map_entry * rcpu,struct xdp_buff * xdp,struct net_device * dev_rx)1708 static inline int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu,
1709 struct xdp_buff *xdp,
1710 struct net_device *dev_rx)
1711 {
1712 return 0;
1713 }
1714
cpu_map_prog_allowed(struct bpf_map * map)1715 static inline bool cpu_map_prog_allowed(struct bpf_map *map)
1716 {
1717 return false;
1718 }
1719
bpf_prog_get_type_path(const char * name,enum bpf_prog_type type)1720 static inline struct bpf_prog *bpf_prog_get_type_path(const char *name,
1721 enum bpf_prog_type type)
1722 {
1723 return ERR_PTR(-EOPNOTSUPP);
1724 }
1725
bpf_prog_test_run_xdp(struct bpf_prog * prog,const union bpf_attr * kattr,union bpf_attr __user * uattr)1726 static inline int bpf_prog_test_run_xdp(struct bpf_prog *prog,
1727 const union bpf_attr *kattr,
1728 union bpf_attr __user *uattr)
1729 {
1730 return -ENOTSUPP;
1731 }
1732
bpf_prog_test_run_skb(struct bpf_prog * prog,const union bpf_attr * kattr,union bpf_attr __user * uattr)1733 static inline int bpf_prog_test_run_skb(struct bpf_prog *prog,
1734 const union bpf_attr *kattr,
1735 union bpf_attr __user *uattr)
1736 {
1737 return -ENOTSUPP;
1738 }
1739
bpf_prog_test_run_tracing(struct bpf_prog * prog,const union bpf_attr * kattr,union bpf_attr __user * uattr)1740 static inline int bpf_prog_test_run_tracing(struct bpf_prog *prog,
1741 const union bpf_attr *kattr,
1742 union bpf_attr __user *uattr)
1743 {
1744 return -ENOTSUPP;
1745 }
1746
bpf_prog_test_run_flow_dissector(struct bpf_prog * prog,const union bpf_attr * kattr,union bpf_attr __user * uattr)1747 static inline int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog,
1748 const union bpf_attr *kattr,
1749 union bpf_attr __user *uattr)
1750 {
1751 return -ENOTSUPP;
1752 }
1753
bpf_map_put(struct bpf_map * map)1754 static inline void bpf_map_put(struct bpf_map *map)
1755 {
1756 }
1757
bpf_prog_by_id(u32 id)1758 static inline struct bpf_prog *bpf_prog_by_id(u32 id)
1759 {
1760 return ERR_PTR(-ENOTSUPP);
1761 }
1762
1763 static inline const struct bpf_func_proto *
bpf_base_func_proto(enum bpf_func_id func_id)1764 bpf_base_func_proto(enum bpf_func_id func_id)
1765 {
1766 return NULL;
1767 }
1768
unprivileged_ebpf_enabled(void)1769 static inline bool unprivileged_ebpf_enabled(void)
1770 {
1771 return false;
1772 }
1773
1774 #endif /* CONFIG_BPF_SYSCALL */
1775
bpf_prog_get_type(u32 ufd,enum bpf_prog_type type)1776 static inline struct bpf_prog *bpf_prog_get_type(u32 ufd,
1777 enum bpf_prog_type type)
1778 {
1779 return bpf_prog_get_type_dev(ufd, type, false);
1780 }
1781
1782 void __bpf_free_used_maps(struct bpf_prog_aux *aux,
1783 struct bpf_map **used_maps, u32 len);
1784
1785 bool bpf_prog_get_ok(struct bpf_prog *, enum bpf_prog_type *, bool);
1786
1787 int bpf_prog_offload_compile(struct bpf_prog *prog);
1788 void bpf_prog_offload_destroy(struct bpf_prog *prog);
1789 int bpf_prog_offload_info_fill(struct bpf_prog_info *info,
1790 struct bpf_prog *prog);
1791
1792 int bpf_map_offload_info_fill(struct bpf_map_info *info, struct bpf_map *map);
1793
1794 int bpf_map_offload_lookup_elem(struct bpf_map *map, void *key, void *value);
1795 int bpf_map_offload_update_elem(struct bpf_map *map,
1796 void *key, void *value, u64 flags);
1797 int bpf_map_offload_delete_elem(struct bpf_map *map, void *key);
1798 int bpf_map_offload_get_next_key(struct bpf_map *map,
1799 void *key, void *next_key);
1800
1801 bool bpf_offload_prog_map_match(struct bpf_prog *prog, struct bpf_map *map);
1802
1803 struct bpf_offload_dev *
1804 bpf_offload_dev_create(const struct bpf_prog_offload_ops *ops, void *priv);
1805 void bpf_offload_dev_destroy(struct bpf_offload_dev *offdev);
1806 void *bpf_offload_dev_priv(struct bpf_offload_dev *offdev);
1807 int bpf_offload_dev_netdev_register(struct bpf_offload_dev *offdev,
1808 struct net_device *netdev);
1809 void bpf_offload_dev_netdev_unregister(struct bpf_offload_dev *offdev,
1810 struct net_device *netdev);
1811 bool bpf_offload_dev_match(struct bpf_prog *prog, struct net_device *netdev);
1812
1813 void unpriv_ebpf_notify(int new_state);
1814
1815 #if defined(CONFIG_NET) && defined(CONFIG_BPF_SYSCALL)
1816 int bpf_prog_offload_init(struct bpf_prog *prog, union bpf_attr *attr);
1817
bpf_prog_is_dev_bound(const struct bpf_prog_aux * aux)1818 static inline bool bpf_prog_is_dev_bound(const struct bpf_prog_aux *aux)
1819 {
1820 return aux->offload_requested;
1821 }
1822
bpf_map_is_dev_bound(struct bpf_map * map)1823 static inline bool bpf_map_is_dev_bound(struct bpf_map *map)
1824 {
1825 return unlikely(map->ops == &bpf_map_offload_ops);
1826 }
1827
1828 struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr);
1829 void bpf_map_offload_map_free(struct bpf_map *map);
1830 #else
bpf_prog_offload_init(struct bpf_prog * prog,union bpf_attr * attr)1831 static inline int bpf_prog_offload_init(struct bpf_prog *prog,
1832 union bpf_attr *attr)
1833 {
1834 return -EOPNOTSUPP;
1835 }
1836
bpf_prog_is_dev_bound(struct bpf_prog_aux * aux)1837 static inline bool bpf_prog_is_dev_bound(struct bpf_prog_aux *aux)
1838 {
1839 return false;
1840 }
1841
bpf_map_is_dev_bound(struct bpf_map * map)1842 static inline bool bpf_map_is_dev_bound(struct bpf_map *map)
1843 {
1844 return false;
1845 }
1846
bpf_map_offload_map_alloc(union bpf_attr * attr)1847 static inline struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr)
1848 {
1849 return ERR_PTR(-EOPNOTSUPP);
1850 }
1851
bpf_map_offload_map_free(struct bpf_map * map)1852 static inline void bpf_map_offload_map_free(struct bpf_map *map)
1853 {
1854 }
1855 #endif /* CONFIG_NET && CONFIG_BPF_SYSCALL */
1856
1857 #if defined(CONFIG_BPF_STREAM_PARSER)
1858 int sock_map_prog_update(struct bpf_map *map, struct bpf_prog *prog,
1859 struct bpf_prog *old, u32 which);
1860 int sock_map_get_from_fd(const union bpf_attr *attr, struct bpf_prog *prog);
1861 int sock_map_prog_detach(const union bpf_attr *attr, enum bpf_prog_type ptype);
1862 int sock_map_update_elem_sys(struct bpf_map *map, void *key, void *value, u64 flags);
1863 void sock_map_unhash(struct sock *sk);
1864 void sock_map_close(struct sock *sk, long timeout);
1865 #else
sock_map_prog_update(struct bpf_map * map,struct bpf_prog * prog,struct bpf_prog * old,u32 which)1866 static inline int sock_map_prog_update(struct bpf_map *map,
1867 struct bpf_prog *prog,
1868 struct bpf_prog *old, u32 which)
1869 {
1870 return -EOPNOTSUPP;
1871 }
1872
sock_map_get_from_fd(const union bpf_attr * attr,struct bpf_prog * prog)1873 static inline int sock_map_get_from_fd(const union bpf_attr *attr,
1874 struct bpf_prog *prog)
1875 {
1876 return -EINVAL;
1877 }
1878
sock_map_prog_detach(const union bpf_attr * attr,enum bpf_prog_type ptype)1879 static inline int sock_map_prog_detach(const union bpf_attr *attr,
1880 enum bpf_prog_type ptype)
1881 {
1882 return -EOPNOTSUPP;
1883 }
1884
sock_map_update_elem_sys(struct bpf_map * map,void * key,void * value,u64 flags)1885 static inline int sock_map_update_elem_sys(struct bpf_map *map, void *key, void *value,
1886 u64 flags)
1887 {
1888 return -EOPNOTSUPP;
1889 }
1890 #endif /* CONFIG_BPF_STREAM_PARSER */
1891
1892 #if defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL)
1893 void bpf_sk_reuseport_detach(struct sock *sk);
1894 int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map, void *key,
1895 void *value);
1896 int bpf_fd_reuseport_array_update_elem(struct bpf_map *map, void *key,
1897 void *value, u64 map_flags);
1898 #else
bpf_sk_reuseport_detach(struct sock * sk)1899 static inline void bpf_sk_reuseport_detach(struct sock *sk)
1900 {
1901 }
1902
1903 #ifdef CONFIG_BPF_SYSCALL
bpf_fd_reuseport_array_lookup_elem(struct bpf_map * map,void * key,void * value)1904 static inline int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map,
1905 void *key, void *value)
1906 {
1907 return -EOPNOTSUPP;
1908 }
1909
bpf_fd_reuseport_array_update_elem(struct bpf_map * map,void * key,void * value,u64 map_flags)1910 static inline int bpf_fd_reuseport_array_update_elem(struct bpf_map *map,
1911 void *key, void *value,
1912 u64 map_flags)
1913 {
1914 return -EOPNOTSUPP;
1915 }
1916 #endif /* CONFIG_BPF_SYSCALL */
1917 #endif /* defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL) */
1918
1919 /* verifier prototypes for helper functions called from eBPF programs */
1920 extern const struct bpf_func_proto bpf_map_lookup_elem_proto;
1921 extern const struct bpf_func_proto bpf_map_update_elem_proto;
1922 extern const struct bpf_func_proto bpf_map_delete_elem_proto;
1923 extern const struct bpf_func_proto bpf_map_push_elem_proto;
1924 extern const struct bpf_func_proto bpf_map_pop_elem_proto;
1925 extern const struct bpf_func_proto bpf_map_peek_elem_proto;
1926
1927 extern const struct bpf_func_proto bpf_get_prandom_u32_proto;
1928 extern const struct bpf_func_proto bpf_get_smp_processor_id_proto;
1929 extern const struct bpf_func_proto bpf_get_numa_node_id_proto;
1930 extern const struct bpf_func_proto bpf_tail_call_proto;
1931 extern const struct bpf_func_proto bpf_ktime_get_ns_proto;
1932 extern const struct bpf_func_proto bpf_ktime_get_boot_ns_proto;
1933 extern const struct bpf_func_proto bpf_get_current_pid_tgid_proto;
1934 extern const struct bpf_func_proto bpf_get_current_uid_gid_proto;
1935 extern const struct bpf_func_proto bpf_get_current_comm_proto;
1936 extern const struct bpf_func_proto bpf_get_stackid_proto;
1937 extern const struct bpf_func_proto bpf_get_stack_proto;
1938 extern const struct bpf_func_proto bpf_get_task_stack_proto;
1939 extern const struct bpf_func_proto bpf_get_stackid_proto_pe;
1940 extern const struct bpf_func_proto bpf_get_stack_proto_pe;
1941 extern const struct bpf_func_proto bpf_sock_map_update_proto;
1942 extern const struct bpf_func_proto bpf_sock_hash_update_proto;
1943 extern const struct bpf_func_proto bpf_get_current_cgroup_id_proto;
1944 extern const struct bpf_func_proto bpf_get_current_ancestor_cgroup_id_proto;
1945 extern const struct bpf_func_proto bpf_msg_redirect_hash_proto;
1946 extern const struct bpf_func_proto bpf_msg_redirect_map_proto;
1947 extern const struct bpf_func_proto bpf_sk_redirect_hash_proto;
1948 extern const struct bpf_func_proto bpf_sk_redirect_map_proto;
1949 extern const struct bpf_func_proto bpf_spin_lock_proto;
1950 extern const struct bpf_func_proto bpf_spin_unlock_proto;
1951 extern const struct bpf_func_proto bpf_get_local_storage_proto;
1952 extern const struct bpf_func_proto bpf_strtol_proto;
1953 extern const struct bpf_func_proto bpf_strtoul_proto;
1954 extern const struct bpf_func_proto bpf_tcp_sock_proto;
1955 extern const struct bpf_func_proto bpf_jiffies64_proto;
1956 extern const struct bpf_func_proto bpf_get_ns_current_pid_tgid_proto;
1957 extern const struct bpf_func_proto bpf_event_output_data_proto;
1958 extern const struct bpf_func_proto bpf_ringbuf_output_proto;
1959 extern const struct bpf_func_proto bpf_ringbuf_reserve_proto;
1960 extern const struct bpf_func_proto bpf_ringbuf_submit_proto;
1961 extern const struct bpf_func_proto bpf_ringbuf_discard_proto;
1962 extern const struct bpf_func_proto bpf_ringbuf_query_proto;
1963 extern const struct bpf_func_proto bpf_skc_to_tcp6_sock_proto;
1964 extern const struct bpf_func_proto bpf_skc_to_tcp_sock_proto;
1965 extern const struct bpf_func_proto bpf_skc_to_tcp_timewait_sock_proto;
1966 extern const struct bpf_func_proto bpf_skc_to_tcp_request_sock_proto;
1967 extern const struct bpf_func_proto bpf_skc_to_udp6_sock_proto;
1968 extern const struct bpf_func_proto bpf_copy_from_user_proto;
1969 extern const struct bpf_func_proto bpf_snprintf_btf_proto;
1970 extern const struct bpf_func_proto bpf_per_cpu_ptr_proto;
1971 extern const struct bpf_func_proto bpf_this_cpu_ptr_proto;
1972
1973 const struct bpf_func_proto *bpf_tracing_func_proto(
1974 enum bpf_func_id func_id, const struct bpf_prog *prog);
1975
1976 const struct bpf_func_proto *tracing_prog_func_proto(
1977 enum bpf_func_id func_id, const struct bpf_prog *prog);
1978
1979 /* Shared helpers among cBPF and eBPF. */
1980 void bpf_user_rnd_init_once(void);
1981 u64 bpf_user_rnd_u32(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
1982 u64 bpf_get_raw_cpu_id(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
1983
1984 #if defined(CONFIG_NET)
1985 bool bpf_sock_common_is_valid_access(int off, int size,
1986 enum bpf_access_type type,
1987 struct bpf_insn_access_aux *info);
1988 bool bpf_sock_is_valid_access(int off, int size, enum bpf_access_type type,
1989 struct bpf_insn_access_aux *info);
1990 u32 bpf_sock_convert_ctx_access(enum bpf_access_type type,
1991 const struct bpf_insn *si,
1992 struct bpf_insn *insn_buf,
1993 struct bpf_prog *prog,
1994 u32 *target_size);
1995 #else
bpf_sock_common_is_valid_access(int off,int size,enum bpf_access_type type,struct bpf_insn_access_aux * info)1996 static inline bool bpf_sock_common_is_valid_access(int off, int size,
1997 enum bpf_access_type type,
1998 struct bpf_insn_access_aux *info)
1999 {
2000 return false;
2001 }
bpf_sock_is_valid_access(int off,int size,enum bpf_access_type type,struct bpf_insn_access_aux * info)2002 static inline bool bpf_sock_is_valid_access(int off, int size,
2003 enum bpf_access_type type,
2004 struct bpf_insn_access_aux *info)
2005 {
2006 return false;
2007 }
bpf_sock_convert_ctx_access(enum bpf_access_type type,const struct bpf_insn * si,struct bpf_insn * insn_buf,struct bpf_prog * prog,u32 * target_size)2008 static inline u32 bpf_sock_convert_ctx_access(enum bpf_access_type type,
2009 const struct bpf_insn *si,
2010 struct bpf_insn *insn_buf,
2011 struct bpf_prog *prog,
2012 u32 *target_size)
2013 {
2014 return 0;
2015 }
2016 #endif
2017
2018 #ifdef CONFIG_INET
2019 struct sk_reuseport_kern {
2020 struct sk_buff *skb;
2021 struct sock *sk;
2022 struct sock *selected_sk;
2023 void *data_end;
2024 u32 hash;
2025 u32 reuseport_id;
2026 bool bind_inany;
2027 };
2028 bool bpf_tcp_sock_is_valid_access(int off, int size, enum bpf_access_type type,
2029 struct bpf_insn_access_aux *info);
2030
2031 u32 bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type,
2032 const struct bpf_insn *si,
2033 struct bpf_insn *insn_buf,
2034 struct bpf_prog *prog,
2035 u32 *target_size);
2036
2037 bool bpf_xdp_sock_is_valid_access(int off, int size, enum bpf_access_type type,
2038 struct bpf_insn_access_aux *info);
2039
2040 u32 bpf_xdp_sock_convert_ctx_access(enum bpf_access_type type,
2041 const struct bpf_insn *si,
2042 struct bpf_insn *insn_buf,
2043 struct bpf_prog *prog,
2044 u32 *target_size);
2045 #else
bpf_tcp_sock_is_valid_access(int off,int size,enum bpf_access_type type,struct bpf_insn_access_aux * info)2046 static inline bool bpf_tcp_sock_is_valid_access(int off, int size,
2047 enum bpf_access_type type,
2048 struct bpf_insn_access_aux *info)
2049 {
2050 return false;
2051 }
2052
bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type,const struct bpf_insn * si,struct bpf_insn * insn_buf,struct bpf_prog * prog,u32 * target_size)2053 static inline u32 bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type,
2054 const struct bpf_insn *si,
2055 struct bpf_insn *insn_buf,
2056 struct bpf_prog *prog,
2057 u32 *target_size)
2058 {
2059 return 0;
2060 }
bpf_xdp_sock_is_valid_access(int off,int size,enum bpf_access_type type,struct bpf_insn_access_aux * info)2061 static inline bool bpf_xdp_sock_is_valid_access(int off, int size,
2062 enum bpf_access_type type,
2063 struct bpf_insn_access_aux *info)
2064 {
2065 return false;
2066 }
2067
bpf_xdp_sock_convert_ctx_access(enum bpf_access_type type,const struct bpf_insn * si,struct bpf_insn * insn_buf,struct bpf_prog * prog,u32 * target_size)2068 static inline u32 bpf_xdp_sock_convert_ctx_access(enum bpf_access_type type,
2069 const struct bpf_insn *si,
2070 struct bpf_insn *insn_buf,
2071 struct bpf_prog *prog,
2072 u32 *target_size)
2073 {
2074 return 0;
2075 }
2076 #endif /* CONFIG_INET */
2077
2078 enum bpf_text_poke_type {
2079 BPF_MOD_CALL,
2080 BPF_MOD_JUMP,
2081 };
2082
2083 int bpf_arch_text_poke(void *ip, enum bpf_text_poke_type t,
2084 void *addr1, void *addr2);
2085
2086 struct btf_id_set;
2087 bool btf_id_set_contains(const struct btf_id_set *set, u32 id);
2088
2089 #endif /* _LINUX_BPF_H */
2090