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	#include <uapi/linux/filter.h>
9
10	#include <linux/workqueue.h>
11	#include <linux/file.h>
12	#include <linux/percpu.h>
13	#include <linux/err.h>
14	#include <linux/rbtree_latch.h>
15	#include <linux/numa.h>
16	#include <linux/mm_types.h>
17	#include <linux/wait.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/sched/mm.h>
24	#include <linux/slab.h>
25	#include <linux/percpu-refcount.h>
26	#include <linux/stddef.h>
27	#include <linux/bpfptr.h>
28	#include <linux/btf.h>
29	#include <linux/rcupdate_trace.h>
30	#include <linux/static_call.h>
31	#include <linux/memcontrol.h>
32	#include <linux/cfi.h>
33
34	struct bpf_verifier_env;
35	struct bpf_verifier_log;
36	struct perf_event;
37	struct bpf_prog;
38	struct bpf_prog_aux;
39	struct bpf_map;
40	struct bpf_arena;
41	struct sock;
42	struct seq_file;
43	struct btf;
44	struct btf_type;
45	struct exception_table_entry;
46	struct seq_operations;
47	struct bpf_iter_aux_info;
48	struct bpf_local_storage;
49	struct bpf_local_storage_map;
50	struct kobject;
51	struct mem_cgroup;
52	struct module;
53	struct bpf_func_state;
54	struct ftrace_ops;
55	struct cgroup;
56	struct bpf_token;
57	struct user_namespace;
58	struct super_block;
59	struct inode;
60
61	extern struct idr btf_idr;
62	extern spinlock_t btf_idr_lock;
63	extern struct kobject *btf_kobj;
64	extern struct bpf_mem_alloc bpf_global_ma, bpf_global_percpu_ma;
65	extern bool bpf_global_ma_set;
66
67	typedef u64 (*bpf_callback_t)(u64, u64, u64, u64, u64);
68	typedef int (*bpf_iter_init_seq_priv_t)(void *private_data,
69	struct bpf_iter_aux_info *aux);
70	typedef void (*bpf_iter_fini_seq_priv_t)(void *private_data);
71	typedef unsigned int (*bpf_func_t)(const void *,
72	const struct bpf_insn *);
73	struct bpf_iter_seq_info {
74	const struct seq_operations *seq_ops;
75	bpf_iter_init_seq_priv_t init_seq_private;
76	bpf_iter_fini_seq_priv_t fini_seq_private;
77	u32 seq_priv_size;
78	};
79
80	/* map is generic key/value storage optionally accessible by eBPF programs */
81	struct bpf_map_ops {
82	/* funcs callable from userspace (via syscall) */
83	int (*map_alloc_check)(union bpf_attr *attr);
84	struct bpf_map *(*map_alloc)(union bpf_attr *attr);
85	void (*map_release)(struct bpf_map *map, struct file *map_file);
86	void (*map_free)(struct bpf_map *map);
87	int (*map_get_next_key)(struct bpf_map *map, void *key, void *next_key);
88	void (*map_release_uref)(struct bpf_map *map);
89	void *(*map_lookup_elem_sys_only)(struct bpf_map *map, void *key);
90	int (*map_lookup_batch)(struct bpf_map *map, const union bpf_attr *attr,
91	union bpf_attr __user *uattr);
92	int (*map_lookup_and_delete_elem)(struct bpf_map *map, void *key,
93	void *value, u64 flags);
94	int (*map_lookup_and_delete_batch)(struct bpf_map *map,
95	const union bpf_attr *attr,
96	union bpf_attr __user *uattr);
97	int (*map_update_batch)(struct bpf_map *map, struct file *map_file,
98	const union bpf_attr *attr,
99	union bpf_attr __user *uattr);
100	int (*map_delete_batch)(struct bpf_map *map, const union bpf_attr *attr,
101	union bpf_attr __user *uattr);
102
103	/* funcs callable from userspace and from eBPF programs */
104	void *(*map_lookup_elem)(struct bpf_map *map, void *key);
105	long (*map_update_elem)(struct bpf_map *map, void *key, void *value, u64 flags);
106	long (*map_delete_elem)(struct bpf_map *map, void *key);
107	long (*map_push_elem)(struct bpf_map *map, void *value, u64 flags);
108	long (*map_pop_elem)(struct bpf_map *map, void *value);
109	long (*map_peek_elem)(struct bpf_map *map, void *value);
110	void *(*map_lookup_percpu_elem)(struct bpf_map *map, void *key, u32 cpu);
111
112	/* funcs called by prog_array and perf_event_array map */
113	void *(*map_fd_get_ptr)(struct bpf_map *map, struct file *map_file,
114	int fd);
115	/* If need_defer is true, the implementation should guarantee that
116	* the to-be-put element is still alive before the bpf program, which
117	* may manipulate it, exists.
118	*/
119	void (*map_fd_put_ptr)(struct bpf_map *map, void *ptr, bool need_defer);
120	int (*map_gen_lookup)(struct bpf_map *map, struct bpf_insn *insn_buf);
121	u32 (*map_fd_sys_lookup_elem)(void *ptr);
122	void (*map_seq_show_elem)(struct bpf_map *map, void *key,
123	struct seq_file *m);
124	int (*map_check_btf)(const struct bpf_map *map,
125	const struct btf *btf,
126	const struct btf_type *key_type,
127	const struct btf_type *value_type);
128
129	/* Prog poke tracking helpers. */
130	int (*map_poke_track)(struct bpf_map *map, struct bpf_prog_aux *aux);
131	void (*map_poke_untrack)(struct bpf_map *map, struct bpf_prog_aux *aux);
132	void (*map_poke_run)(struct bpf_map *map, u32 key, struct bpf_prog *old,
133	struct bpf_prog *new);
134
135	/* Direct value access helpers. */
136	int (*map_direct_value_addr)(const struct bpf_map *map,
137	u64 *imm, u32 off);
138	int (*map_direct_value_meta)(const struct bpf_map *map,
139	u64 imm, u32 *off);
140	int (*map_mmap)(struct bpf_map *map, struct vm_area_struct *vma);
141	__poll_t (*map_poll)(struct bpf_map *map, struct file *filp,
142	struct poll_table_struct *pts);
143	unsigned long (*map_get_unmapped_area)(struct file *filep, unsigned long addr,
144	unsigned long len, unsigned long pgoff,
145	unsigned long flags);
146
147	/* Functions called by bpf_local_storage maps */
148	int (*map_local_storage_charge)(struct bpf_local_storage_map *smap,
149	void *owner, u32 size);
150	void (*map_local_storage_uncharge)(struct bpf_local_storage_map *smap,
151	void *owner, u32 size);
152	struct bpf_local_storage __rcu ** (*map_owner_storage_ptr)(void *owner);
153
154	/* Misc helpers.*/
155	long (*map_redirect)(struct bpf_map *map, u64 key, u64 flags);
156
157	/* map_meta_equal must be implemented for maps that can be
158	* used as an inner map. It is a runtime check to ensure
159	* an inner map can be inserted to an outer map.
160	*
161	* Some properties of the inner map has been used during the
162	* verification time. When inserting an inner map at the runtime,
163	* map_meta_equal has to ensure the inserting map has the same
164	* properties that the verifier has used earlier.
165	*/
166	bool (*map_meta_equal)(const struct bpf_map *meta0,
167	const struct bpf_map *meta1);
168
169
170	int (*map_set_for_each_callback_args)(struct bpf_verifier_env *env,
171	struct bpf_func_state *caller,
172	struct bpf_func_state *callee);
173	long (*map_for_each_callback)(struct bpf_map *map,
174	bpf_callback_t callback_fn,
175	void *callback_ctx, u64 flags);
176
177	u64 (*map_mem_usage)(const struct bpf_map *map);
178
179	/* BTF id of struct allocated by map_alloc */
180	int *map_btf_id;
181
182	/* bpf_iter info used to open a seq_file */
183	const struct bpf_iter_seq_info *iter_seq_info;
184	};
185
186	enum {
187	/* Support at most 10 fields in a BTF type */
188	BTF_FIELDS_MAX = 10,
189	};
190
191	enum btf_field_type {
192	BPF_SPIN_LOCK = (1 << 0),
193	BPF_TIMER = (1 << 1),
194	BPF_KPTR_UNREF = (1 << 2),
195	BPF_KPTR_REF = (1 << 3),
196	BPF_KPTR_PERCPU = (1 << 4),
197	BPF_KPTR = BPF_KPTR_UNREF | BPF_KPTR_REF | BPF_KPTR_PERCPU,
198	BPF_LIST_HEAD = (1 << 5),
199	BPF_LIST_NODE = (1 << 6),
200	BPF_RB_ROOT = (1 << 7),
201	BPF_RB_NODE = (1 << 8),
202	BPF_GRAPH_NODE = BPF_RB_NODE | BPF_LIST_NODE,
203	BPF_GRAPH_ROOT = BPF_RB_ROOT | BPF_LIST_HEAD,
204	BPF_REFCOUNT = (1 << 9),
205	};
206
207	typedef void (*btf_dtor_kfunc_t)(void *);
208
209	struct btf_field_kptr {
210	struct btf *btf;
211	struct module *module;
212	/* dtor used if btf_is_kernel(btf), otherwise the type is
213	* program-allocated, dtor is NULL, and __bpf_obj_drop_impl is used
214	*/
215	btf_dtor_kfunc_t dtor;
216	u32 btf_id;
217	};
218
219	struct btf_field_graph_root {
220	struct btf *btf;
221	u32 value_btf_id;
222	u32 node_offset;
223	struct btf_record *value_rec;
224	};
225
226	struct btf_field {
227	u32 offset;
228	u32 size;
229	enum btf_field_type type;
230	union {
231	struct btf_field_kptr kptr;
232	struct btf_field_graph_root graph_root;
233	};
234	};
235
236	struct btf_record {
237	u32 cnt;
238	u32 field_mask;
239	int spin_lock_off;
240	int timer_off;
241	int refcount_off;
242	struct btf_field fields[];
243	};
244
245	/* Non-opaque version of bpf_rb_node in uapi/linux/bpf.h */
246	struct bpf_rb_node_kern {
247	struct rb_node rb_node;
248	void *owner;
249	} __attribute__((aligned(8)));
250
251	/* Non-opaque version of bpf_list_node in uapi/linux/bpf.h */
252	struct bpf_list_node_kern {
253	struct list_head list_head;
254	void *owner;
255	} __attribute__((aligned(8)));
256
257	struct bpf_map {
258	const struct bpf_map_ops *ops;
259	struct bpf_map *inner_map_meta;
260	#ifdef CONFIG_SECURITY
261	void *security;
262	#endif
263	enum bpf_map_type map_type;
264	u32 key_size;
265	u32 value_size;
266	u32 max_entries;
267	u64 map_extra; /* any per-map-type extra fields */
268	u32 map_flags;
269	u32 id;
270	struct btf_record *record;
271	int numa_node;
272	u32 btf_key_type_id;
273	u32 btf_value_type_id;
274	u32 btf_vmlinux_value_type_id;
275	struct btf *btf;
276	#ifdef CONFIG_MEMCG_KMEM
277	struct obj_cgroup *objcg;
278	#endif
279	char name[BPF_OBJ_NAME_LEN];
280	struct mutex freeze_mutex;
281	atomic64_t refcnt;
282	atomic64_t usercnt;
283	/* rcu is used before freeing and work is only used during freeing */
284	union {
285	struct work_struct work;
286	struct rcu_head rcu;
287	};
288	atomic64_t writecnt;
289	/* 'Ownership' of program-containing map is claimed by the first program
290	* that is going to use this map or by the first program which FD is
291	* stored in the map to make sure that all callers and callees have the
292	* same prog type, JITed flag and xdp_has_frags flag.
293	*/
294	struct {
295	spinlock_t lock;
296	enum bpf_prog_type type;
297	bool jited;
298	bool xdp_has_frags;
299	} owner;
300	bool bypass_spec_v1;
301	bool frozen; /* write-once; write-protected by freeze_mutex */
302	bool free_after_mult_rcu_gp;
303	bool free_after_rcu_gp;
304	atomic64_t sleepable_refcnt;
305	s64 __percpu *elem_count;
306	};
307
308	static inline const char *btf_field_type_name(enum btf_field_type type)
309	{
310	switch (type) {
311	case BPF_SPIN_LOCK:
312	return "bpf_spin_lock";
313	case BPF_TIMER:
314	return "bpf_timer";
315	case BPF_KPTR_UNREF:
316	case BPF_KPTR_REF:
317	return "kptr";
318	case BPF_KPTR_PERCPU:
319	return "percpu_kptr";
320	case BPF_LIST_HEAD:
321	return "bpf_list_head";
322	case BPF_LIST_NODE:
323	return "bpf_list_node";
324	case BPF_RB_ROOT:
325	return "bpf_rb_root";
326	case BPF_RB_NODE:
327	return "bpf_rb_node";
328	case BPF_REFCOUNT:
329	return "bpf_refcount";
330	default:
331	WARN_ON_ONCE(1);
332	return "unknown";
333	}
334	}
335
336	static inline u32 btf_field_type_size(enum btf_field_type type)
337	{
338	switch (type) {
339	case BPF_SPIN_LOCK:
340	return sizeof(struct bpf_spin_lock);
341	case BPF_TIMER:
342	return sizeof(struct bpf_timer);
343	case BPF_KPTR_UNREF:
344	case BPF_KPTR_REF:
345	case BPF_KPTR_PERCPU:
346	return sizeof(u64);
347	case BPF_LIST_HEAD:
348	return sizeof(struct bpf_list_head);
349	case BPF_LIST_NODE:
350	return sizeof(struct bpf_list_node);
351	case BPF_RB_ROOT:
352	return sizeof(struct bpf_rb_root);
353	case BPF_RB_NODE:
354	return sizeof(struct bpf_rb_node);
355	case BPF_REFCOUNT:
356	return sizeof(struct bpf_refcount);
357	default:
358	WARN_ON_ONCE(1);
359	return 0;
360	}
361	}
362
363	static inline u32 btf_field_type_align(enum btf_field_type type)
364	{
365	switch (type) {
366	case BPF_SPIN_LOCK:
367	return __alignof__(struct bpf_spin_lock);
368	case BPF_TIMER:
369	return __alignof__(struct bpf_timer);
370	case BPF_KPTR_UNREF:
371	case BPF_KPTR_REF:
372	case BPF_KPTR_PERCPU:
373	return __alignof__(u64);
374	case BPF_LIST_HEAD:
375	return __alignof__(struct bpf_list_head);
376	case BPF_LIST_NODE:
377	return __alignof__(struct bpf_list_node);
378	case BPF_RB_ROOT:
379	return __alignof__(struct bpf_rb_root);
380	case BPF_RB_NODE:
381	return __alignof__(struct bpf_rb_node);
382	case BPF_REFCOUNT:
383	return __alignof__(struct bpf_refcount);
384	default:
385	WARN_ON_ONCE(1);
386	return 0;
387	}
388	}
389
390	static inline void bpf_obj_init_field(const struct btf_field *field, void *addr)
391	{
392	memset(addr, 0, field->size);
393
394	switch (field->type) {
395	case BPF_REFCOUNT:
396	refcount_set(r: (refcount_t *)addr, n: 1);
397	break;
398	case BPF_RB_NODE:
399	RB_CLEAR_NODE((struct rb_node *)addr);
400	break;
401	case BPF_LIST_HEAD:
402	case BPF_LIST_NODE:
403	INIT_LIST_HEAD(list: (struct list_head *)addr);
404	break;
405	case BPF_RB_ROOT:
406	/* RB_ROOT_CACHED 0-inits, no need to do anything after memset */
407	case BPF_SPIN_LOCK:
408	case BPF_TIMER:
409	case BPF_KPTR_UNREF:
410	case BPF_KPTR_REF:
411	case BPF_KPTR_PERCPU:
412	break;
413	default:
414	WARN_ON_ONCE(1);
415	return;
416	}
417	}
418
419	static inline bool btf_record_has_field(const struct btf_record *rec, enum btf_field_type type)
420	{
421	if (IS_ERR_OR_NULL(ptr: rec))
422	return false;
423	return rec->field_mask & type;
424	}
425
426	static inline void bpf_obj_init(const struct btf_record *rec, void *obj)
427	{
428	int i;
429
430	if (IS_ERR_OR_NULL(ptr: rec))
431	return;
432	for (i = 0; i < rec->cnt; i++)
433	bpf_obj_init_field(field: &rec->fields[i], addr: obj + rec->fields[i].offset);
434	}
435
436	/* 'dst' must be a temporary buffer and should not point to memory that is being
437	* used in parallel by a bpf program or bpf syscall, otherwise the access from
438	* the bpf program or bpf syscall may be corrupted by the reinitialization,
439	* leading to weird problems. Even 'dst' is newly-allocated from bpf memory
440	* allocator, it is still possible for 'dst' to be used in parallel by a bpf
441	* program or bpf syscall.
442	*/
443	static inline void check_and_init_map_value(struct bpf_map *map, void *dst)
444	{
445	bpf_obj_init(rec: map->record, obj: dst);
446	}
447
448	/* memcpy that is used with 8-byte aligned pointers, power-of-8 size and
449	* forced to use 'long' read/writes to try to atomically copy long counters.
450	* Best-effort only. No barriers here, since it _will_ race with concurrent
451	* updates from BPF programs. Called from bpf syscall and mostly used with
452	* size 8 or 16 bytes, so ask compiler to inline it.
453	*/
454	static inline void bpf_long_memcpy(void *dst, const void *src, u32 size)
455	{
456	const long *lsrc = src;
457	long *ldst = dst;
458
459	size /= sizeof(long);
460	while (size--)
461	data_race(*ldst++ = *lsrc++);
462	}
463
464	/* copy everything but bpf_spin_lock, bpf_timer, and kptrs. There could be one of each. */
465	static inline void bpf_obj_memcpy(struct btf_record *rec,
466	void *dst, void *src, u32 size,
467	bool long_memcpy)
468	{
469	u32 curr_off = 0;
470	int i;
471
472	if (IS_ERR_OR_NULL(ptr: rec)) {
473	if (long_memcpy)
474	bpf_long_memcpy(dst, src, round_up(size, 8));
475	else
476	memcpy(dst, src, size);
477	return;
478	}
479
480	for (i = 0; i < rec->cnt; i++) {
481	u32 next_off = rec->fields[i].offset;
482	u32 sz = next_off - curr_off;
483
484	memcpy(dst + curr_off, src + curr_off, sz);
485	curr_off += rec->fields[i].size + sz;
486	}
487	memcpy(dst + curr_off, src + curr_off, size - curr_off);
488	}
489
490	static inline void copy_map_value(struct bpf_map *map, void *dst, void *src)
491	{
492	bpf_obj_memcpy(rec: map->record, dst, src, size: map->value_size, long_memcpy: false);
493	}
494
495	static inline void copy_map_value_long(struct bpf_map *map, void *dst, void *src)
496	{
497	bpf_obj_memcpy(rec: map->record, dst, src, size: map->value_size, long_memcpy: true);
498	}
499
500	static inline void bpf_obj_memzero(struct btf_record *rec, void *dst, u32 size)
501	{
502	u32 curr_off = 0;
503	int i;
504
505	if (IS_ERR_OR_NULL(ptr: rec)) {
506	memset(dst, 0, size);
507	return;
508	}
509
510	for (i = 0; i < rec->cnt; i++) {
511	u32 next_off = rec->fields[i].offset;
512	u32 sz = next_off - curr_off;
513
514	memset(dst + curr_off, 0, sz);
515	curr_off += rec->fields[i].size + sz;
516	}
517	memset(dst + curr_off, 0, size - curr_off);
518	}
519
520	static inline void zero_map_value(struct bpf_map *map, void *dst)
521	{
522	bpf_obj_memzero(rec: map->record, dst, size: map->value_size);
523	}
524
525	void copy_map_value_locked(struct bpf_map *map, void *dst, void *src,
526	bool lock_src);
527	void bpf_timer_cancel_and_free(void *timer);
528	void bpf_list_head_free(const struct btf_field *field, void *list_head,
529	struct bpf_spin_lock *spin_lock);
530	void bpf_rb_root_free(const struct btf_field *field, void *rb_root,
531	struct bpf_spin_lock *spin_lock);
532	u64 bpf_arena_get_kern_vm_start(struct bpf_arena *arena);
533	u64 bpf_arena_get_user_vm_start(struct bpf_arena *arena);
534	int bpf_obj_name_cpy(char *dst, const char *src, unsigned int size);
535
536	struct bpf_offload_dev;
537	struct bpf_offloaded_map;
538
539	struct bpf_map_dev_ops {
540	int (*map_get_next_key)(struct bpf_offloaded_map *map,
541	void *key, void *next_key);
542	int (*map_lookup_elem)(struct bpf_offloaded_map *map,
543	void *key, void *value);
544	int (*map_update_elem)(struct bpf_offloaded_map *map,
545	void *key, void *value, u64 flags);
546	int (*map_delete_elem)(struct bpf_offloaded_map *map, void *key);
547	};
548
549	struct bpf_offloaded_map {
550	struct bpf_map map;
551	struct net_device *netdev;
552	const struct bpf_map_dev_ops *dev_ops;
553	void *dev_priv;
554	struct list_head offloads;
555	};
556
557	static inline struct bpf_offloaded_map *map_to_offmap(struct bpf_map *map)
558	{
559	return container_of(map, struct bpf_offloaded_map, map);
560	}
561
562	static inline bool bpf_map_offload_neutral(const struct bpf_map *map)
563	{
564	return map->map_type == BPF_MAP_TYPE_PERF_EVENT_ARRAY;
565	}
566
567	static inline bool bpf_map_support_seq_show(const struct bpf_map *map)
568	{
569	return (map->btf_value_type_id || map->btf_vmlinux_value_type_id) &&
570	map->ops->map_seq_show_elem;
571	}
572
573	int map_check_no_btf(const struct bpf_map *map,
574	const struct btf *btf,
575	const struct btf_type *key_type,
576	const struct btf_type *value_type);
577
578	bool bpf_map_meta_equal(const struct bpf_map *meta0,
579	const struct bpf_map *meta1);
580
581	extern const struct bpf_map_ops bpf_map_offload_ops;
582
583	/* bpf_type_flag contains a set of flags that are applicable to the values of
584	* arg_type, ret_type and reg_type. For example, a pointer value may be null,
585	* or a memory is read-only. We classify types into two categories: base types
586	* and extended types. Extended types are base types combined with a type flag.
587	*
588	* Currently there are no more than 32 base types in arg_type, ret_type and
589	* reg_types.
590	*/
591	#define BPF_BASE_TYPE_BITS 8
592
593	enum bpf_type_flag {
594	/* PTR may be NULL. */
595	PTR_MAYBE_NULL = BIT(0 + BPF_BASE_TYPE_BITS),
596
597	/* MEM is read-only. When applied on bpf_arg, it indicates the arg is
598	* compatible with both mutable and immutable memory.
599	*/
600	MEM_RDONLY = BIT(1 + BPF_BASE_TYPE_BITS),
601
602	/* MEM points to BPF ring buffer reservation. */
603	MEM_RINGBUF = BIT(2 + BPF_BASE_TYPE_BITS),
604
605	/* MEM is in user address space. */
606	MEM_USER = BIT(3 + BPF_BASE_TYPE_BITS),
607
608	/* MEM is a percpu memory. MEM_PERCPU tags PTR_TO_BTF_ID. When tagged
609	* with MEM_PERCPU, PTR_TO_BTF_ID _cannot_ be directly accessed. In
610	* order to drop this tag, it must be passed into bpf_per_cpu_ptr()
611	* or bpf_this_cpu_ptr(), which will return the pointer corresponding
612	* to the specified cpu.
613	*/
614	MEM_PERCPU = BIT(4 + BPF_BASE_TYPE_BITS),
615
616	/* Indicates that the argument will be released. */
617	OBJ_RELEASE = BIT(5 + BPF_BASE_TYPE_BITS),
618
619	/* PTR is not trusted. This is only used with PTR_TO_BTF_ID, to mark
620	* unreferenced and referenced kptr loaded from map value using a load
621	* instruction, so that they can only be dereferenced but not escape the
622	* BPF program into the kernel (i.e. cannot be passed as arguments to
623	* kfunc or bpf helpers).
624	*/
625	PTR_UNTRUSTED = BIT(6 + BPF_BASE_TYPE_BITS),
626
627	MEM_UNINIT = BIT(7 + BPF_BASE_TYPE_BITS),
628
629	/* DYNPTR points to memory local to the bpf program. */
630	DYNPTR_TYPE_LOCAL = BIT(8 + BPF_BASE_TYPE_BITS),
631
632	/* DYNPTR points to a kernel-produced ringbuf record. */
633	DYNPTR_TYPE_RINGBUF = BIT(9 + BPF_BASE_TYPE_BITS),
634
635	/* Size is known at compile time. */
636	MEM_FIXED_SIZE = BIT(10 + BPF_BASE_TYPE_BITS),
637
638	/* MEM is of an allocated object of type in program BTF. This is used to
639	* tag PTR_TO_BTF_ID allocated using bpf_obj_new.
640	*/
641	MEM_ALLOC = BIT(11 + BPF_BASE_TYPE_BITS),
642
643	/* PTR was passed from the kernel in a trusted context, and may be
644	* passed to KF_TRUSTED_ARGS kfuncs or BPF helper functions.
645	* Confusingly, this is _not_ the opposite of PTR_UNTRUSTED above.
646	* PTR_UNTRUSTED refers to a kptr that was read directly from a map
647	* without invoking bpf_kptr_xchg(). What we really need to know is
648	* whether a pointer is safe to pass to a kfunc or BPF helper function.
649	* While PTR_UNTRUSTED pointers are unsafe to pass to kfuncs and BPF
650	* helpers, they do not cover all possible instances of unsafe
651	* pointers. For example, a pointer that was obtained from walking a
652	* struct will _not_ get the PTR_UNTRUSTED type modifier, despite the
653	* fact that it may be NULL, invalid, etc. This is due to backwards
654	* compatibility requirements, as this was the behavior that was first
655	* introduced when kptrs were added. The behavior is now considered
656	* deprecated, and PTR_UNTRUSTED will eventually be removed.
657	*
658	* PTR_TRUSTED, on the other hand, is a pointer that the kernel
659	* guarantees to be valid and safe to pass to kfuncs and BPF helpers.
660	* For example, pointers passed to tracepoint arguments are considered
661	* PTR_TRUSTED, as are pointers that are passed to struct_ops
662	* callbacks. As alluded to above, pointers that are obtained from
663	* walking PTR_TRUSTED pointers are _not_ trusted. For example, if a
664	* struct task_struct *task is PTR_TRUSTED, then accessing
665	* task->last_wakee will lose the PTR_TRUSTED modifier when it's stored
666	* in a BPF register. Similarly, pointers passed to certain programs
667	* types such as kretprobes are not guaranteed to be valid, as they may
668	* for example contain an object that was recently freed.
669	*/
670	PTR_TRUSTED = BIT(12 + BPF_BASE_TYPE_BITS),
671
672	/* MEM is tagged with rcu and memory access needs rcu_read_lock protection. */
673	MEM_RCU = BIT(13 + BPF_BASE_TYPE_BITS),
674
675	/* Used to tag PTR_TO_BTF_ID | MEM_ALLOC references which are non-owning.
676	* Currently only valid for linked-list and rbtree nodes. If the nodes
677	* have a bpf_refcount_field, they must be tagged MEM_RCU as well.
678	*/
679	NON_OWN_REF = BIT(14 + BPF_BASE_TYPE_BITS),
680
681	/* DYNPTR points to sk_buff */
682	DYNPTR_TYPE_SKB = BIT(15 + BPF_BASE_TYPE_BITS),
683
684	/* DYNPTR points to xdp_buff */
685	DYNPTR_TYPE_XDP = BIT(16 + BPF_BASE_TYPE_BITS),
686
687	__BPF_TYPE_FLAG_MAX,
688	__BPF_TYPE_LAST_FLAG = __BPF_TYPE_FLAG_MAX - 1,
689	};
690
691	#define DYNPTR_TYPE_FLAG_MASK (DYNPTR_TYPE_LOCAL | DYNPTR_TYPE_RINGBUF | DYNPTR_TYPE_SKB \
692	| DYNPTR_TYPE_XDP)
693
694	/* Max number of base types. */
695	#define BPF_BASE_TYPE_LIMIT (1UL << BPF_BASE_TYPE_BITS)
696
697	/* Max number of all types. */
698	#define BPF_TYPE_LIMIT (__BPF_TYPE_LAST_FLAG | (__BPF_TYPE_LAST_FLAG - 1))
699
700	/* function argument constraints */
701	enum bpf_arg_type {
702	ARG_DONTCARE = 0, /* unused argument in helper function */
703
704	/* the following constraints used to prototype
705	* bpf_map_lookup/update/delete_elem() functions
706	*/
707	ARG_CONST_MAP_PTR, /* const argument used as pointer to bpf_map */
708	ARG_PTR_TO_MAP_KEY, /* pointer to stack used as map key */
709	ARG_PTR_TO_MAP_VALUE, /* pointer to stack used as map value */
710
711	/* Used to prototype bpf_memcmp() and other functions that access data
712	* on eBPF program stack
713	*/
714	ARG_PTR_TO_MEM, /* pointer to valid memory (stack, packet, map value) */
715	ARG_PTR_TO_ARENA,
716
717	ARG_CONST_SIZE, /* number of bytes accessed from memory */
718	ARG_CONST_SIZE_OR_ZERO, /* number of bytes accessed from memory or 0 */
719
720	ARG_PTR_TO_CTX, /* pointer to context */
721	ARG_ANYTHING, /* any (initialized) argument is ok */
722	ARG_PTR_TO_SPIN_LOCK, /* pointer to bpf_spin_lock */
723	ARG_PTR_TO_SOCK_COMMON, /* pointer to sock_common */
724	ARG_PTR_TO_INT, /* pointer to int */
725	ARG_PTR_TO_LONG, /* pointer to long */
726	ARG_PTR_TO_SOCKET, /* pointer to bpf_sock (fullsock) */
727	ARG_PTR_TO_BTF_ID, /* pointer to in-kernel struct */
728	ARG_PTR_TO_RINGBUF_MEM, /* pointer to dynamically reserved ringbuf memory */
729	ARG_CONST_ALLOC_SIZE_OR_ZERO, /* number of allocated bytes requested */
730	ARG_PTR_TO_BTF_ID_SOCK_COMMON, /* pointer to in-kernel sock_common or bpf-mirrored bpf_sock */
731	ARG_PTR_TO_PERCPU_BTF_ID, /* pointer to in-kernel percpu type */
732	ARG_PTR_TO_FUNC, /* pointer to a bpf program function */
733	ARG_PTR_TO_STACK, /* pointer to stack */
734	ARG_PTR_TO_CONST_STR, /* pointer to a null terminated read-only string */
735	ARG_PTR_TO_TIMER, /* pointer to bpf_timer */
736	ARG_PTR_TO_KPTR, /* pointer to referenced kptr */
737	ARG_PTR_TO_DYNPTR, /* pointer to bpf_dynptr. See bpf_type_flag for dynptr type */
738	__BPF_ARG_TYPE_MAX,
739
740	/* Extended arg_types. */
741	ARG_PTR_TO_MAP_VALUE_OR_NULL = PTR_MAYBE_NULL | ARG_PTR_TO_MAP_VALUE,
742	ARG_PTR_TO_MEM_OR_NULL = PTR_MAYBE_NULL | ARG_PTR_TO_MEM,
743	ARG_PTR_TO_CTX_OR_NULL = PTR_MAYBE_NULL | ARG_PTR_TO_CTX,
744	ARG_PTR_TO_SOCKET_OR_NULL = PTR_MAYBE_NULL | ARG_PTR_TO_SOCKET,
745	ARG_PTR_TO_STACK_OR_NULL = PTR_MAYBE_NULL | ARG_PTR_TO_STACK,
746	ARG_PTR_TO_BTF_ID_OR_NULL = PTR_MAYBE_NULL | ARG_PTR_TO_BTF_ID,
747	/* pointer to memory does not need to be initialized, helper function must fill
748	* all bytes or clear them in error case.
749	*/
750	ARG_PTR_TO_UNINIT_MEM = MEM_UNINIT | ARG_PTR_TO_MEM,
751	/* Pointer to valid memory of size known at compile time. */
752	ARG_PTR_TO_FIXED_SIZE_MEM = MEM_FIXED_SIZE | ARG_PTR_TO_MEM,
753
754	/* This must be the last entry. Its purpose is to ensure the enum is
755	* wide enough to hold the higher bits reserved for bpf_type_flag.
756	*/
757	__BPF_ARG_TYPE_LIMIT = BPF_TYPE_LIMIT,
758	};
759	static_assert(__BPF_ARG_TYPE_MAX <= BPF_BASE_TYPE_LIMIT);
760
761	/* type of values returned from helper functions */
762	enum bpf_return_type {
763	RET_INTEGER, /* function returns integer */
764	RET_VOID, /* function doesn't return anything */
765	RET_PTR_TO_MAP_VALUE, /* returns a pointer to map elem value */
766	RET_PTR_TO_SOCKET, /* returns a pointer to a socket */
767	RET_PTR_TO_TCP_SOCK, /* returns a pointer to a tcp_sock */
768	RET_PTR_TO_SOCK_COMMON, /* returns a pointer to a sock_common */
769	RET_PTR_TO_MEM, /* returns a pointer to memory */
770	RET_PTR_TO_MEM_OR_BTF_ID, /* returns a pointer to a valid memory or a btf_id */
771	RET_PTR_TO_BTF_ID, /* returns a pointer to a btf_id */
772	__BPF_RET_TYPE_MAX,
773
774	/* Extended ret_types. */
775	RET_PTR_TO_MAP_VALUE_OR_NULL = PTR_MAYBE_NULL | RET_PTR_TO_MAP_VALUE,
776	RET_PTR_TO_SOCKET_OR_NULL = PTR_MAYBE_NULL | RET_PTR_TO_SOCKET,
777	RET_PTR_TO_TCP_SOCK_OR_NULL = PTR_MAYBE_NULL | RET_PTR_TO_TCP_SOCK,
778	RET_PTR_TO_SOCK_COMMON_OR_NULL = PTR_MAYBE_NULL | RET_PTR_TO_SOCK_COMMON,
779	RET_PTR_TO_RINGBUF_MEM_OR_NULL = PTR_MAYBE_NULL | MEM_RINGBUF | RET_PTR_TO_MEM,
780	RET_PTR_TO_DYNPTR_MEM_OR_NULL = PTR_MAYBE_NULL | RET_PTR_TO_MEM,
781	RET_PTR_TO_BTF_ID_OR_NULL = PTR_MAYBE_NULL | RET_PTR_TO_BTF_ID,
782	RET_PTR_TO_BTF_ID_TRUSTED = PTR_TRUSTED | RET_PTR_TO_BTF_ID,
783
784	/* This must be the last entry. Its purpose is to ensure the enum is
785	* wide enough to hold the higher bits reserved for bpf_type_flag.
786	*/
787	__BPF_RET_TYPE_LIMIT = BPF_TYPE_LIMIT,
788	};
789	static_assert(__BPF_RET_TYPE_MAX <= BPF_BASE_TYPE_LIMIT);
790
791	/* eBPF function prototype used by verifier to allow BPF_CALLs from eBPF programs
792	* to in-kernel helper functions and for adjusting imm32 field in BPF_CALL
793	* instructions after verifying
794	*/
795	struct bpf_func_proto {
796	u64 (*func)(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
797	bool gpl_only;
798	bool pkt_access;
799	bool might_sleep;
800	enum bpf_return_type ret_type;
801	union {
802	struct {
803	enum bpf_arg_type arg1_type;
804	enum bpf_arg_type arg2_type;
805	enum bpf_arg_type arg3_type;
806	enum bpf_arg_type arg4_type;
807	enum bpf_arg_type arg5_type;
808	};
809	enum bpf_arg_type arg_type[5];
810	};
811	union {
812	struct {
813	u32 *arg1_btf_id;
814	u32 *arg2_btf_id;
815	u32 *arg3_btf_id;
816	u32 *arg4_btf_id;
817	u32 *arg5_btf_id;
818	};
819	u32 *arg_btf_id[5];
820	struct {
821	size_t arg1_size;
822	size_t arg2_size;
823	size_t arg3_size;
824	size_t arg4_size;
825	size_t arg5_size;
826	};
827	size_t arg_size[5];
828	};
829	int *ret_btf_id; /* return value btf_id */
830	bool (*allowed)(const struct bpf_prog *prog);
831	};
832
833	/* bpf_context is intentionally undefined structure. Pointer to bpf_context is
834	* the first argument to eBPF programs.
835	* For socket filters: 'struct bpf_context *' == 'struct sk_buff *'
836	*/
837	struct bpf_context;
838
839	enum bpf_access_type {
840	BPF_READ = 1,
841	BPF_WRITE = 2
842	};
843
844	/* types of values stored in eBPF registers */
845	/* Pointer types represent:
846	* pointer
847	* pointer + imm
848	* pointer + (u16) var
849	* pointer + (u16) var + imm
850	* if (range > 0) then [ptr, ptr + range - off) is safe to access
851	* if (id > 0) means that some 'var' was added
852	* if (off > 0) means that 'imm' was added
853	*/
854	enum bpf_reg_type {
855	NOT_INIT = 0, /* nothing was written into register */
856	SCALAR_VALUE, /* reg doesn't contain a valid pointer */
857	PTR_TO_CTX, /* reg points to bpf_context */
858	CONST_PTR_TO_MAP, /* reg points to struct bpf_map */
859	PTR_TO_MAP_VALUE, /* reg points to map element value */
860	PTR_TO_MAP_KEY, /* reg points to a map element key */
861	PTR_TO_STACK, /* reg == frame_pointer + offset */
862	PTR_TO_PACKET_META, /* skb->data - meta_len */
863	PTR_TO_PACKET, /* reg points to skb->data */
864	PTR_TO_PACKET_END, /* skb->data + headlen */
865	PTR_TO_FLOW_KEYS, /* reg points to bpf_flow_keys */
866	PTR_TO_SOCKET, /* reg points to struct bpf_sock */
867	PTR_TO_SOCK_COMMON, /* reg points to sock_common */
868	PTR_TO_TCP_SOCK, /* reg points to struct tcp_sock */
869	PTR_TO_TP_BUFFER, /* reg points to a writable raw tp's buffer */
870	PTR_TO_XDP_SOCK, /* reg points to struct xdp_sock */
871	/* PTR_TO_BTF_ID points to a kernel struct that does not need
872	* to be null checked by the BPF program. This does not imply the
873	* pointer is _not_ null and in practice this can easily be a null
874	* pointer when reading pointer chains. The assumption is program
875	* context will handle null pointer dereference typically via fault
876	* handling. The verifier must keep this in mind and can make no
877	* assumptions about null or non-null when doing branch analysis.
878	* Further, when passed into helpers the helpers can not, without
879	* additional context, assume the value is non-null.
880	*/
881	PTR_TO_BTF_ID,
882	/* PTR_TO_BTF_ID_OR_NULL points to a kernel struct that has not
883	* been checked for null. Used primarily to inform the verifier
884	* an explicit null check is required for this struct.
885	*/
886	PTR_TO_MEM, /* reg points to valid memory region */
887	PTR_TO_ARENA,
888	PTR_TO_BUF, /* reg points to a read/write buffer */
889	PTR_TO_FUNC, /* reg points to a bpf program function */
890	CONST_PTR_TO_DYNPTR, /* reg points to a const struct bpf_dynptr */
891	__BPF_REG_TYPE_MAX,
892
893	/* Extended reg_types. */
894	PTR_TO_MAP_VALUE_OR_NULL = PTR_MAYBE_NULL | PTR_TO_MAP_VALUE,
895	PTR_TO_SOCKET_OR_NULL = PTR_MAYBE_NULL | PTR_TO_SOCKET,
896	PTR_TO_SOCK_COMMON_OR_NULL = PTR_MAYBE_NULL | PTR_TO_SOCK_COMMON,
897	PTR_TO_TCP_SOCK_OR_NULL = PTR_MAYBE_NULL | PTR_TO_TCP_SOCK,
898	PTR_TO_BTF_ID_OR_NULL = PTR_MAYBE_NULL | PTR_TO_BTF_ID,
899
900	/* This must be the last entry. Its purpose is to ensure the enum is
901	* wide enough to hold the higher bits reserved for bpf_type_flag.
902	*/
903	__BPF_REG_TYPE_LIMIT = BPF_TYPE_LIMIT,
904	};
905	static_assert(__BPF_REG_TYPE_MAX <= BPF_BASE_TYPE_LIMIT);
906
907	/* The information passed from prog-specific *_is_valid_access
908	* back to the verifier.
909	*/
910	struct bpf_insn_access_aux {
911	enum bpf_reg_type reg_type;
912	union {
913	int ctx_field_size;
914	struct {
915	struct btf *btf;
916	u32 btf_id;
917	};
918	};
919	struct bpf_verifier_log *log; /* for verbose logs */
920	};
921
922	static inline void
923	bpf_ctx_record_field_size(struct bpf_insn_access_aux *aux, u32 size)
924	{
925	aux->ctx_field_size = size;
926	}
927
928	static bool bpf_is_ldimm64(const struct bpf_insn *insn)
929	{
930	return insn->code == (BPF_LD | BPF_IMM | BPF_DW);
931	}
932
933	static inline bool bpf_pseudo_func(const struct bpf_insn *insn)
934	{
935	return bpf_is_ldimm64(insn) && insn->src_reg == BPF_PSEUDO_FUNC;
936	}
937
938	struct bpf_prog_ops {
939	int (*test_run)(struct bpf_prog *prog, const union bpf_attr *kattr,
940	union bpf_attr __user *uattr);
941	};
942
943	struct bpf_reg_state;
944	struct bpf_verifier_ops {
945	/* return eBPF function prototype for verification */
946	const struct bpf_func_proto *
947	(*get_func_proto)(enum bpf_func_id func_id,
948	const struct bpf_prog *prog);
949
950	/* return true if 'size' wide access at offset 'off' within bpf_context
951	* with 'type' (read or write) is allowed
952	*/
953	bool (*is_valid_access)(int off, int size, enum bpf_access_type type,
954	const struct bpf_prog *prog,
955	struct bpf_insn_access_aux *info);
956	int (*gen_prologue)(struct bpf_insn *insn, bool direct_write,
957	const struct bpf_prog *prog);
958	int (*gen_ld_abs)(const struct bpf_insn *orig,
959	struct bpf_insn *insn_buf);
960	u32 (*convert_ctx_access)(enum bpf_access_type type,
961	const struct bpf_insn *src,
962	struct bpf_insn *dst,
963	struct bpf_prog *prog, u32 *target_size);
964	int (*btf_struct_access)(struct bpf_verifier_log *log,
965	const struct bpf_reg_state *reg,
966	int off, int size);
967	};
968
969	struct bpf_prog_offload_ops {
970	/* verifier basic callbacks */
971	int (*insn_hook)(struct bpf_verifier_env *env,
972	int insn_idx, int prev_insn_idx);
973	int (*finalize)(struct bpf_verifier_env *env);
974	/* verifier optimization callbacks (called after .finalize) */
975	int (*replace_insn)(struct bpf_verifier_env *env, u32 off,
976	struct bpf_insn *insn);
977	int (*remove_insns)(struct bpf_verifier_env *env, u32 off, u32 cnt);
978	/* program management callbacks */
979	int (*prepare)(struct bpf_prog *prog);
980	int (*translate)(struct bpf_prog *prog);
981	void (*destroy)(struct bpf_prog *prog);
982	};
983
984	struct bpf_prog_offload {
985	struct bpf_prog *prog;
986	struct net_device *netdev;
987	struct bpf_offload_dev *offdev;
988	void *dev_priv;
989	struct list_head offloads;
990	bool dev_state;
991	bool opt_failed;
992	void *jited_image;
993	u32 jited_len;
994	};
995
996	enum bpf_cgroup_storage_type {
997	BPF_CGROUP_STORAGE_SHARED,
998	BPF_CGROUP_STORAGE_PERCPU,
999	__BPF_CGROUP_STORAGE_MAX
1000	};
1001
1002	#define MAX_BPF_CGROUP_STORAGE_TYPE __BPF_CGROUP_STORAGE_MAX
1003
1004	/* The longest tracepoint has 12 args.
1005	* See include/trace/bpf_probe.h
1006	*/
1007	#define MAX_BPF_FUNC_ARGS 12
1008
1009	/* The maximum number of arguments passed through registers
1010	* a single function may have.
1011	*/
1012	#define MAX_BPF_FUNC_REG_ARGS 5
1013
1014	/* The argument is a structure. */
1015	#define BTF_FMODEL_STRUCT_ARG BIT(0)
1016
1017	/* The argument is signed. */
1018	#define BTF_FMODEL_SIGNED_ARG BIT(1)
1019
1020	struct btf_func_model {
1021	u8 ret_size;
1022	u8 ret_flags;
1023	u8 nr_args;
1024	u8 arg_size[MAX_BPF_FUNC_ARGS];
1025	u8 arg_flags[MAX_BPF_FUNC_ARGS];
1026	};
1027
1028	/* Restore arguments before returning from trampoline to let original function
1029	* continue executing. This flag is used for fentry progs when there are no
1030	* fexit progs.
1031	*/
1032	#define BPF_TRAMP_F_RESTORE_REGS BIT(0)
1033	/* Call original function after fentry progs, but before fexit progs.
1034	* Makes sense for fentry/fexit, normal calls and indirect calls.
1035	*/
1036	#define BPF_TRAMP_F_CALL_ORIG BIT(1)
1037	/* Skip current frame and return to parent. Makes sense for fentry/fexit
1038	* programs only. Should not be used with normal calls and indirect calls.
1039	*/
1040	#define BPF_TRAMP_F_SKIP_FRAME BIT(2)
1041	/* Store IP address of the caller on the trampoline stack,
1042	* so it's available for trampoline's programs.
1043	*/
1044	#define BPF_TRAMP_F_IP_ARG BIT(3)
1045	/* Return the return value of fentry prog. Only used by bpf_struct_ops. */
1046	#define BPF_TRAMP_F_RET_FENTRY_RET BIT(4)
1047
1048	/* Get original function from stack instead of from provided direct address.
1049	* Makes sense for trampolines with fexit or fmod_ret programs.
1050	*/
1051	#define BPF_TRAMP_F_ORIG_STACK BIT(5)
1052
1053	/* This trampoline is on a function with another ftrace_ops with IPMODIFY,
1054	* e.g., a live patch. This flag is set and cleared by ftrace call backs,
1055	*/
1056	#define BPF_TRAMP_F_SHARE_IPMODIFY BIT(6)
1057
1058	/* Indicate that current trampoline is in a tail call context. Then, it has to
1059	* cache and restore tail_call_cnt to avoid infinite tail call loop.
1060	*/
1061	#define BPF_TRAMP_F_TAIL_CALL_CTX BIT(7)
1062
1063	/*
1064	* Indicate the trampoline should be suitable to receive indirect calls;
1065	* without this indirectly calling the generated code can result in #UD/#CP,
1066	* depending on the CFI options.
1067	*
1068	* Used by bpf_struct_ops.
1069	*
1070	* Incompatible with FENTRY usage, overloads @func_addr argument.
1071	*/
1072	#define BPF_TRAMP_F_INDIRECT BIT(8)
1073
1074	/* Each call __bpf_prog_enter + call bpf_func + call __bpf_prog_exit is ~50
1075	* bytes on x86.
1076	*/
1077	enum {
1078	#if defined(__s390x__)
1079	BPF_MAX_TRAMP_LINKS = 27,
1080	#else
1081	BPF_MAX_TRAMP_LINKS = 38,
1082	#endif
1083	};
1084
1085	struct bpf_tramp_links {
1086	struct bpf_tramp_link *links[BPF_MAX_TRAMP_LINKS];
1087	int nr_links;
1088	};
1089
1090	struct bpf_tramp_run_ctx;
1091
1092	/* Different use cases for BPF trampoline:
1093	* 1. replace nop at the function entry (kprobe equivalent)
1094	* flags = BPF_TRAMP_F_RESTORE_REGS
1095	* fentry = a set of programs to run before returning from trampoline
1096	*
1097	* 2. replace nop at the function entry (kprobe + kretprobe equivalent)
1098	* flags = BPF_TRAMP_F_CALL_ORIG | BPF_TRAMP_F_SKIP_FRAME
1099	* orig_call = fentry_ip + MCOUNT_INSN_SIZE
1100	* fentry = a set of program to run before calling original function
1101	* fexit = a set of program to run after original function
1102	*
1103	* 3. replace direct call instruction anywhere in the function body
1104	* or assign a function pointer for indirect call (like tcp_congestion_ops->cong_avoid)
1105	* With flags = 0
1106	* fentry = a set of programs to run before returning from trampoline
1107	* With flags = BPF_TRAMP_F_CALL_ORIG
1108	* orig_call = original callback addr or direct function addr
1109	* fentry = a set of program to run before calling original function
1110	* fexit = a set of program to run after original function
1111	*/
1112	struct bpf_tramp_image;
1113	int arch_prepare_bpf_trampoline(struct bpf_tramp_image *im, void *image, void *image_end,
1114	const struct btf_func_model *m, u32 flags,
1115	struct bpf_tramp_links *tlinks,
1116	void *func_addr);
1117	void *arch_alloc_bpf_trampoline(unsigned int size);
1118	void arch_free_bpf_trampoline(void *image, unsigned int size);
1119	void arch_protect_bpf_trampoline(void *image, unsigned int size);
1120	void arch_unprotect_bpf_trampoline(void *image, unsigned int size);
1121	int arch_bpf_trampoline_size(const struct btf_func_model *m, u32 flags,
1122	struct bpf_tramp_links *tlinks, void *func_addr);
1123
1124	u64 notrace __bpf_prog_enter_sleepable_recur(struct bpf_prog *prog,
1125	struct bpf_tramp_run_ctx *run_ctx);
1126	void notrace __bpf_prog_exit_sleepable_recur(struct bpf_prog *prog, u64 start,
1127	struct bpf_tramp_run_ctx *run_ctx);
1128	void notrace __bpf_tramp_enter(struct bpf_tramp_image *tr);
1129	void notrace __bpf_tramp_exit(struct bpf_tramp_image *tr);
1130	typedef u64 (*bpf_trampoline_enter_t)(struct bpf_prog *prog,
1131	struct bpf_tramp_run_ctx *run_ctx);
1132	typedef void (*bpf_trampoline_exit_t)(struct bpf_prog *prog, u64 start,
1133	struct bpf_tramp_run_ctx *run_ctx);
1134	bpf_trampoline_enter_t bpf_trampoline_enter(const struct bpf_prog *prog);
1135	bpf_trampoline_exit_t bpf_trampoline_exit(const struct bpf_prog *prog);
1136
1137	struct bpf_ksym {
1138	unsigned long start;
1139	unsigned long end;
1140	char name[KSYM_NAME_LEN];
1141	struct list_head lnode;
1142	struct latch_tree_node tnode;
1143	bool prog;
1144	};
1145
1146	enum bpf_tramp_prog_type {
1147	BPF_TRAMP_FENTRY,
1148	BPF_TRAMP_FEXIT,
1149	BPF_TRAMP_MODIFY_RETURN,
1150	BPF_TRAMP_MAX,
1151	BPF_TRAMP_REPLACE, /* more than MAX */
1152	};
1153
1154	struct bpf_tramp_image {
1155	void *image;
1156	int size;
1157	struct bpf_ksym ksym;
1158	struct percpu_ref pcref;
1159	void *ip_after_call;
1160	void *ip_epilogue;
1161	union {
1162	struct rcu_head rcu;
1163	struct work_struct work;
1164	};
1165	};
1166
1167	struct bpf_trampoline {
1168	/* hlist for trampoline_table */
1169	struct hlist_node hlist;
1170	struct ftrace_ops *fops;
1171	/* serializes access to fields of this trampoline */
1172	struct mutex mutex;
1173	refcount_t refcnt;
1174	u32 flags;
1175	u64 key;
1176	struct {
1177	struct btf_func_model model;
1178	void *addr;
1179	bool ftrace_managed;
1180	} func;
1181	/* if !NULL this is BPF_PROG_TYPE_EXT program that extends another BPF
1182	* program by replacing one of its functions. func.addr is the address
1183	* of the function it replaced.
1184	*/
1185	struct bpf_prog *extension_prog;
1186	/* list of BPF programs using this trampoline */
1187	struct hlist_head progs_hlist[BPF_TRAMP_MAX];
1188	/* Number of attached programs. A counter per kind. */
1189	int progs_cnt[BPF_TRAMP_MAX];
1190	/* Executable image of trampoline */
1191	struct bpf_tramp_image *cur_image;
1192	};
1193
1194	struct bpf_attach_target_info {
1195	struct btf_func_model fmodel;
1196	long tgt_addr;
1197	struct module *tgt_mod;
1198	const char *tgt_name;
1199	const struct btf_type *tgt_type;
1200	};
1201
1202	#define BPF_DISPATCHER_MAX 48 /* Fits in 2048B */
1203
1204	struct bpf_dispatcher_prog {
1205	struct bpf_prog *prog;
1206	refcount_t users;
1207	};
1208
1209	struct bpf_dispatcher {
1210	/* dispatcher mutex */
1211	struct mutex mutex;
1212	void *func;
1213	struct bpf_dispatcher_prog progs[BPF_DISPATCHER_MAX];
1214	int num_progs;
1215	void *image;
1216	void *rw_image;
1217	u32 image_off;
1218	struct bpf_ksym ksym;
1219	#ifdef CONFIG_HAVE_STATIC_CALL
1220	struct static_call_key *sc_key;
1221	void *sc_tramp;
1222	#endif
1223	};
1224
1225	#ifndef __bpfcall
1226	#define __bpfcall __nocfi
1227	#endif
1228
1229	static __always_inline __bpfcall unsigned int bpf_dispatcher_nop_func(
1230	const void *ctx,
1231	const struct bpf_insn *insnsi,
1232	bpf_func_t bpf_func)
1233	{
1234	return bpf_func(ctx, insnsi);
1235	}
1236
1237	/* the implementation of the opaque uapi struct bpf_dynptr */
1238	struct bpf_dynptr_kern {
1239	void *data;
1240	/* Size represents the number of usable bytes of dynptr data.
1241	* If for example the offset is at 4 for a local dynptr whose data is
1242	* of type u64, the number of usable bytes is 4.
1243	*
1244	* The upper 8 bits are reserved. It is as follows:
1245	* Bits 0 - 23 = size
1246	* Bits 24 - 30 = dynptr type
1247	* Bit 31 = whether dynptr is read-only
1248	*/
1249	u32 size;
1250	u32 offset;
1251	} __aligned(8);
1252
1253	enum bpf_dynptr_type {
1254	BPF_DYNPTR_TYPE_INVALID,
1255	/* Points to memory that is local to the bpf program */
1256	BPF_DYNPTR_TYPE_LOCAL,
1257	/* Underlying data is a ringbuf record */
1258	BPF_DYNPTR_TYPE_RINGBUF,
1259	/* Underlying data is a sk_buff */
1260	BPF_DYNPTR_TYPE_SKB,
1261	/* Underlying data is a xdp_buff */
1262	BPF_DYNPTR_TYPE_XDP,
1263	};
1264
1265	int bpf_dynptr_check_size(u32 size);
1266	u32 __bpf_dynptr_size(const struct bpf_dynptr_kern *ptr);
1267	const void *__bpf_dynptr_data(const struct bpf_dynptr_kern *ptr, u32 len);
1268	void *__bpf_dynptr_data_rw(const struct bpf_dynptr_kern *ptr, u32 len);
1269
1270	#ifdef CONFIG_BPF_JIT
1271	int bpf_trampoline_link_prog(struct bpf_tramp_link *link, struct bpf_trampoline *tr);
1272	int bpf_trampoline_unlink_prog(struct bpf_tramp_link *link, struct bpf_trampoline *tr);
1273	struct bpf_trampoline *bpf_trampoline_get(u64 key,
1274	struct bpf_attach_target_info *tgt_info);
1275	void bpf_trampoline_put(struct bpf_trampoline *tr);
1276	int arch_prepare_bpf_dispatcher(void *image, void *buf, s64 *funcs, int num_funcs);
1277
1278	/*
1279	* When the architecture supports STATIC_CALL replace the bpf_dispatcher_fn
1280	* indirection with a direct call to the bpf program. If the architecture does
1281	* not have STATIC_CALL, avoid a double-indirection.
1282	*/
1283	#ifdef CONFIG_HAVE_STATIC_CALL
1284
1285	#define __BPF_DISPATCHER_SC_INIT(_name) \
1286	.sc_key = &STATIC_CALL_KEY(_name), \
1287	.sc_tramp = STATIC_CALL_TRAMP_ADDR(_name),
1288
1289	#define __BPF_DISPATCHER_SC(name) \
1290	DEFINE_STATIC_CALL(bpf_dispatcher_##name##_call, bpf_dispatcher_nop_func)
1291
1292	#define __BPF_DISPATCHER_CALL(name) \
1293	static_call(bpf_dispatcher_##name##_call)(ctx, insnsi, bpf_func)
1294
1295	#define __BPF_DISPATCHER_UPDATE(_d, _new) \
1296	__static_call_update((_d)->sc_key, (_d)->sc_tramp, (_new))
1297
1298	#else
1299	#define __BPF_DISPATCHER_SC_INIT(name)
1300	#define __BPF_DISPATCHER_SC(name)
1301	#define __BPF_DISPATCHER_CALL(name) bpf_func(ctx, insnsi)
1302	#define __BPF_DISPATCHER_UPDATE(_d, _new)
1303	#endif
1304
1305	#define BPF_DISPATCHER_INIT(_name) { \
1306	.mutex = __MUTEX_INITIALIZER(_name.mutex), \
1307	.func = &_name##_func, \
1308	.progs = {}, \
1309	.num_progs = 0, \
1310	.image = NULL, \
1311	.image_off = 0, \
1312	.ksym = { \
1313	.name = #_name, \
1314	.lnode = LIST_HEAD_INIT(_name.ksym.lnode), \
1315	}, \
1316	__BPF_DISPATCHER_SC_INIT(_name##_call) \
1317	}
1318
1319	#define DEFINE_BPF_DISPATCHER(name) \
1320	__BPF_DISPATCHER_SC(name); \
1321	noinline __bpfcall unsigned int bpf_dispatcher_##name##_func( \
1322	const void *ctx, \
1323	const struct bpf_insn *insnsi, \
1324	bpf_func_t bpf_func) \
1325	{ \
1326	return __BPF_DISPATCHER_CALL(name); \
1327	} \
1328	EXPORT_SYMBOL(bpf_dispatcher_##name##_func); \
1329	struct bpf_dispatcher bpf_dispatcher_##name = \
1330	BPF_DISPATCHER_INIT(bpf_dispatcher_##name);
1331
1332	#define DECLARE_BPF_DISPATCHER(name) \
1333	unsigned int bpf_dispatcher_##name##_func( \
1334	const void *ctx, \
1335	const struct bpf_insn *insnsi, \
1336	bpf_func_t bpf_func); \
1337	extern struct bpf_dispatcher bpf_dispatcher_##name;
1338
1339	#define BPF_DISPATCHER_FUNC(name) bpf_dispatcher_##name##_func
1340	#define BPF_DISPATCHER_PTR(name) (&bpf_dispatcher_##name)
1341	void bpf_dispatcher_change_prog(struct bpf_dispatcher *d, struct bpf_prog *from,
1342	struct bpf_prog *to);
1343	/* Called only from JIT-enabled code, so there's no need for stubs. */
1344	void bpf_image_ksym_add(void *data, unsigned int size, struct bpf_ksym *ksym);
1345	void bpf_image_ksym_del(struct bpf_ksym *ksym);
1346	void bpf_ksym_add(struct bpf_ksym *ksym);
1347	void bpf_ksym_del(struct bpf_ksym *ksym);
1348	int bpf_jit_charge_modmem(u32 size);
1349	void bpf_jit_uncharge_modmem(u32 size);
1350	bool bpf_prog_has_trampoline(const struct bpf_prog *prog);
1351	#else
1352	static inline int bpf_trampoline_link_prog(struct bpf_tramp_link *link,
1353	struct bpf_trampoline *tr)
1354	{
1355	return -ENOTSUPP;
1356	}
1357	static inline int bpf_trampoline_unlink_prog(struct bpf_tramp_link *link,
1358	struct bpf_trampoline *tr)
1359	{
1360	return -ENOTSUPP;
1361	}
1362	static inline struct bpf_trampoline *bpf_trampoline_get(u64 key,
1363	struct bpf_attach_target_info *tgt_info)
1364	{
1365	return NULL;
1366	}
1367	static inline void bpf_trampoline_put(struct bpf_trampoline *tr) {}
1368	#define DEFINE_BPF_DISPATCHER(name)
1369	#define DECLARE_BPF_DISPATCHER(name)
1370	#define BPF_DISPATCHER_FUNC(name) bpf_dispatcher_nop_func
1371	#define BPF_DISPATCHER_PTR(name) NULL
1372	static inline void bpf_dispatcher_change_prog(struct bpf_dispatcher *d,
1373	struct bpf_prog *from,
1374	struct bpf_prog *to) {}
1375	static inline bool is_bpf_image_address(unsigned long address)
1376	{
1377	return false;
1378	}
1379	static inline bool bpf_prog_has_trampoline(const struct bpf_prog *prog)
1380	{
1381	return false;
1382	}
1383	#endif
1384
1385	struct bpf_func_info_aux {
1386	u16 linkage;
1387	bool unreliable;
1388	bool called : 1;
1389	bool verified : 1;
1390	};
1391
1392	enum bpf_jit_poke_reason {
1393	BPF_POKE_REASON_TAIL_CALL,
1394	};
1395
1396	/* Descriptor of pokes pointing /into/ the JITed image. */
1397	struct bpf_jit_poke_descriptor {
1398	void *tailcall_target;
1399	void *tailcall_bypass;
1400	void *bypass_addr;
1401	void *aux;
1402	union {
1403	struct {
1404	struct bpf_map *map;
1405	u32 key;
1406	} tail_call;
1407	};
1408	bool tailcall_target_stable;
1409	u8 adj_off;
1410	u16 reason;
1411	u32 insn_idx;
1412	};
1413
1414	/* reg_type info for ctx arguments */
1415	struct bpf_ctx_arg_aux {
1416	u32 offset;
1417	enum bpf_reg_type reg_type;
1418	struct btf *btf;
1419	u32 btf_id;
1420	};
1421
1422	struct btf_mod_pair {
1423	struct btf *btf;
1424	struct module *module;
1425	};
1426
1427	struct bpf_kfunc_desc_tab;
1428
1429	struct bpf_prog_aux {
1430	atomic64_t refcnt;
1431	u32 used_map_cnt;
1432	u32 used_btf_cnt;
1433	u32 max_ctx_offset;
1434	u32 max_pkt_offset;
1435	u32 max_tp_access;
1436	u32 stack_depth;
1437	u32 id;
1438	u32 func_cnt; /* used by non-func prog as the number of func progs */
1439	u32 real_func_cnt; /* includes hidden progs, only used for JIT and freeing progs */
1440	u32 func_idx; /* 0 for non-func prog, the index in func array for func prog */
1441	u32 attach_btf_id; /* in-kernel BTF type id to attach to */
1442	u32 ctx_arg_info_size;
1443	u32 max_rdonly_access;
1444	u32 max_rdwr_access;
1445	struct btf *attach_btf;
1446	const struct bpf_ctx_arg_aux *ctx_arg_info;
1447	struct mutex dst_mutex; /* protects dst_* pointers below, *after* prog becomes visible */
1448	struct bpf_prog *dst_prog;
1449	struct bpf_trampoline *dst_trampoline;
1450	enum bpf_prog_type saved_dst_prog_type;
1451	enum bpf_attach_type saved_dst_attach_type;
1452	bool verifier_zext; /* Zero extensions has been inserted by verifier. */
1453	bool dev_bound; /* Program is bound to the netdev. */
1454	bool offload_requested; /* Program is bound and offloaded to the netdev. */
1455	bool attach_btf_trace; /* true if attaching to BTF-enabled raw tp */
1456	bool attach_tracing_prog; /* true if tracing another tracing program */
1457	bool func_proto_unreliable;
1458	bool tail_call_reachable;
1459	bool xdp_has_frags;
1460	bool exception_cb;
1461	bool exception_boundary;
1462	struct bpf_arena *arena;
1463	/* BTF_KIND_FUNC_PROTO for valid attach_btf_id */
1464	const struct btf_type *attach_func_proto;
1465	/* function name for valid attach_btf_id */
1466	const char *attach_func_name;
1467	struct bpf_prog **func;
1468	void *jit_data; /* JIT specific data. arch dependent */
1469	struct bpf_jit_poke_descriptor *poke_tab;
1470	struct bpf_kfunc_desc_tab *kfunc_tab;
1471	struct bpf_kfunc_btf_tab *kfunc_btf_tab;
1472	u32 size_poke_tab;
1473	#ifdef CONFIG_FINEIBT
1474	struct bpf_ksym ksym_prefix;
1475	#endif
1476	struct bpf_ksym ksym;
1477	const struct bpf_prog_ops *ops;
1478	struct bpf_map **used_maps;
1479	struct mutex used_maps_mutex; /* mutex for used_maps and used_map_cnt */
1480	struct btf_mod_pair *used_btfs;
1481	struct bpf_prog *prog;
1482	struct user_struct *user;
1483	u64 load_time; /* ns since boottime */
1484	u32 verified_insns;
1485	int cgroup_atype; /* enum cgroup_bpf_attach_type */
1486	struct bpf_map *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE];
1487	char name[BPF_OBJ_NAME_LEN];
1488	u64 (*bpf_exception_cb)(u64 cookie, u64 sp, u64 bp, u64, u64);
1489	#ifdef CONFIG_SECURITY
1490	void *security;
1491	#endif
1492	struct bpf_token *token;
1493	struct bpf_prog_offload *offload;
1494	struct btf *btf;
1495	struct bpf_func_info *func_info;
1496	struct bpf_func_info_aux *func_info_aux;
1497	/* bpf_line_info loaded from userspace. linfo->insn_off
1498	* has the xlated insn offset.
1499	* Both the main and sub prog share the same linfo.
1500	* The subprog can access its first linfo by
1501	* using the linfo_idx.
1502	*/
1503	struct bpf_line_info *linfo;
1504	/* jited_linfo is the jited addr of the linfo. It has a
1505	* one to one mapping to linfo:
1506	* jited_linfo[i] is the jited addr for the linfo[i]->insn_off.
1507	* Both the main and sub prog share the same jited_linfo.
1508	* The subprog can access its first jited_linfo by
1509	* using the linfo_idx.
1510	*/
1511	void **jited_linfo;
1512	u32 func_info_cnt;
1513	u32 nr_linfo;
1514	/* subprog can use linfo_idx to access its first linfo and
1515	* jited_linfo.
1516	* main prog always has linfo_idx == 0
1517	*/
1518	u32 linfo_idx;
1519	struct module *mod;
1520	u32 num_exentries;
1521	struct exception_table_entry *extable;
1522	union {
1523	struct work_struct work;
1524	struct rcu_head rcu;
1525	};
1526	};
1527
1528	struct bpf_prog {
1529	u16 pages; /* Number of allocated pages */
1530	u16 jited:1, /* Is our filter JIT'ed? */
1531	jit_requested:1,/* archs need to JIT the prog */
1532	gpl_compatible:1, /* Is filter GPL compatible? */
1533	cb_access:1, /* Is control block accessed? */
1534	dst_needed:1, /* Do we need dst entry? */
1535	blinding_requested:1, /* needs constant blinding */
1536	blinded:1, /* Was blinded */
1537	is_func:1, /* program is a bpf function */
1538	kprobe_override:1, /* Do we override a kprobe? */
1539	has_callchain_buf:1, /* callchain buffer allocated? */
1540	enforce_expected_attach_type:1, /* Enforce expected_attach_type checking at attach time */
1541	call_get_stack:1, /* Do we call bpf_get_stack() or bpf_get_stackid() */
1542	call_get_func_ip:1, /* Do we call get_func_ip() */
1543	tstamp_type_access:1, /* Accessed __sk_buff->tstamp_type */
1544	sleepable:1; /* BPF program is sleepable */
1545	enum bpf_prog_type type; /* Type of BPF program */
1546	enum bpf_attach_type expected_attach_type; /* For some prog types */
1547	u32 len; /* Number of filter blocks */
1548	u32 jited_len; /* Size of jited insns in bytes */
1549	u8 tag[BPF_TAG_SIZE];
1550	struct bpf_prog_stats __percpu *stats;
1551	int __percpu *active;
1552	unsigned int (*bpf_func)(const void *ctx,
1553	const struct bpf_insn *insn);
1554	struct bpf_prog_aux *aux; /* Auxiliary fields */
1555	struct sock_fprog_kern *orig_prog; /* Original BPF program */
1556	/* Instructions for interpreter */
1557	union {
1558	DECLARE_FLEX_ARRAY(struct sock_filter, insns);
1559	DECLARE_FLEX_ARRAY(struct bpf_insn, insnsi);
1560	};
1561	};
1562
1563	struct bpf_array_aux {
1564	/* Programs with direct jumps into programs part of this array. */
1565	struct list_head poke_progs;
1566	struct bpf_map *map;
1567	struct mutex poke_mutex;
1568	struct work_struct work;
1569	};
1570
1571	struct bpf_link {
1572	atomic64_t refcnt;
1573	u32 id;
1574	enum bpf_link_type type;
1575	const struct bpf_link_ops *ops;
1576	struct bpf_prog *prog;
1577	/* rcu is used before freeing, work can be used to schedule that
1578	* RCU-based freeing before that, so they never overlap
1579	*/
1580	union {
1581	struct rcu_head rcu;
1582	struct work_struct work;
1583	};
1584	};
1585
1586	struct bpf_link_ops {
1587	void (*release)(struct bpf_link *link);
1588	/* deallocate link resources callback, called without RCU grace period
1589	* waiting
1590	*/
1591	void (*dealloc)(struct bpf_link *link);
1592	/* deallocate link resources callback, called after RCU grace period;
1593	* if underlying BPF program is sleepable we go through tasks trace
1594	* RCU GP and then "classic" RCU GP
1595	*/
1596	void (*dealloc_deferred)(struct bpf_link *link);
1597	int (*detach)(struct bpf_link *link);
1598	int (*update_prog)(struct bpf_link *link, struct bpf_prog *new_prog,
1599	struct bpf_prog *old_prog);
1600	void (*show_fdinfo)(const struct bpf_link *link, struct seq_file *seq);
1601	int (*fill_link_info)(const struct bpf_link *link,
1602	struct bpf_link_info *info);
1603	int (*update_map)(struct bpf_link *link, struct bpf_map *new_map,
1604	struct bpf_map *old_map);
1605	};
1606
1607	struct bpf_tramp_link {
1608	struct bpf_link link;
1609	struct hlist_node tramp_hlist;
1610	u64 cookie;
1611	};
1612
1613	struct bpf_shim_tramp_link {
1614	struct bpf_tramp_link link;
1615	struct bpf_trampoline *trampoline;
1616	};
1617
1618	struct bpf_tracing_link {
1619	struct bpf_tramp_link link;
1620	enum bpf_attach_type attach_type;
1621	struct bpf_trampoline *trampoline;
1622	struct bpf_prog *tgt_prog;
1623	};
1624
1625	struct bpf_link_primer {
1626	struct bpf_link *link;
1627	struct file *file;
1628	int fd;
1629	u32 id;
1630	};
1631
1632	struct bpf_mount_opts {
1633	kuid_t uid;
1634	kgid_t gid;
1635	umode_t mode;
1636
1637	/* BPF token-related delegation options */
1638	u64 delegate_cmds;
1639	u64 delegate_maps;
1640	u64 delegate_progs;
1641	u64 delegate_attachs;
1642	};
1643
1644	struct bpf_token {
1645	struct work_struct work;
1646	atomic64_t refcnt;
1647	struct user_namespace *userns;
1648	u64 allowed_cmds;
1649	u64 allowed_maps;
1650	u64 allowed_progs;
1651	u64 allowed_attachs;
1652	#ifdef CONFIG_SECURITY
1653	void *security;
1654	#endif
1655	};
1656
1657	struct bpf_struct_ops_value;
1658	struct btf_member;
1659
1660	#define BPF_STRUCT_OPS_MAX_NR_MEMBERS 64
1661	/**
1662	* struct bpf_struct_ops - A structure of callbacks allowing a subsystem to
1663	* define a BPF_MAP_TYPE_STRUCT_OPS map type composed
1664	* of BPF_PROG_TYPE_STRUCT_OPS progs.
1665	* @verifier_ops: A structure of callbacks that are invoked by the verifier
1666	* when determining whether the struct_ops progs in the
1667	* struct_ops map are valid.
1668	* @init: A callback that is invoked a single time, and before any other
1669	* callback, to initialize the structure. A nonzero return value means
1670	* the subsystem could not be initialized.
1671	* @check_member: When defined, a callback invoked by the verifier to allow
1672	* the subsystem to determine if an entry in the struct_ops map
1673	* is valid. A nonzero return value means that the map is
1674	* invalid and should be rejected by the verifier.
1675	* @init_member: A callback that is invoked for each member of the struct_ops
1676	* map to allow the subsystem to initialize the member. A nonzero
1677	* value means the member could not be initialized. This callback
1678	* is exclusive with the @type, @type_id, @value_type, and
1679	* @value_id fields.
1680	* @reg: A callback that is invoked when the struct_ops map has been
1681	* initialized and is being attached to. Zero means the struct_ops map
1682	* has been successfully registered and is live. A nonzero return value
1683	* means the struct_ops map could not be registered.
1684	* @unreg: A callback that is invoked when the struct_ops map should be
1685	* unregistered.
1686	* @update: A callback that is invoked when the live struct_ops map is being
1687	* updated to contain new values. This callback is only invoked when
1688	* the struct_ops map is loaded with BPF_F_LINK. If not defined, the
1689	* it is assumed that the struct_ops map cannot be updated.
1690	* @validate: A callback that is invoked after all of the members have been
1691	* initialized. This callback should perform static checks on the
1692	* map, meaning that it should either fail or succeed
1693	* deterministically. A struct_ops map that has been validated may
1694	* not necessarily succeed in being registered if the call to @reg
1695	* fails. For example, a valid struct_ops map may be loaded, but
1696	* then fail to be registered due to there being another active
1697	* struct_ops map on the system in the subsystem already. For this
1698	* reason, if this callback is not defined, the check is skipped as
1699	* the struct_ops map will have final verification performed in
1700	* @reg.
1701	* @type: BTF type.
1702	* @value_type: Value type.
1703	* @name: The name of the struct bpf_struct_ops object.
1704	* @func_models: Func models
1705	* @type_id: BTF type id.
1706	* @value_id: BTF value id.
1707	*/
1708	struct bpf_struct_ops {
1709	const struct bpf_verifier_ops *verifier_ops;
1710	int (*init)(struct btf *btf);
1711	int (*check_member)(const struct btf_type *t,
1712	const struct btf_member *member,
1713	const struct bpf_prog *prog);
1714	int (*init_member)(const struct btf_type *t,
1715	const struct btf_member *member,
1716	void *kdata, const void *udata);
1717	int (*reg)(void *kdata);
1718	void (*unreg)(void *kdata);
1719	int (*update)(void *kdata, void *old_kdata);
1720	int (*validate)(void *kdata);
1721	void *cfi_stubs;
1722	struct module *owner;
1723	const char *name;
1724	struct btf_func_model func_models[BPF_STRUCT_OPS_MAX_NR_MEMBERS];
1725	};
1726
1727	/* Every member of a struct_ops type has an instance even a member is not
1728	* an operator (function pointer). The "info" field will be assigned to
1729	* prog->aux->ctx_arg_info of BPF struct_ops programs to provide the
1730	* argument information required by the verifier to verify the program.
1731	*
1732	* btf_ctx_access() will lookup prog->aux->ctx_arg_info to find the
1733	* corresponding entry for an given argument.
1734	*/
1735	struct bpf_struct_ops_arg_info {
1736	struct bpf_ctx_arg_aux *info;
1737	u32 cnt;
1738	};
1739
1740	struct bpf_struct_ops_desc {
1741	struct bpf_struct_ops *st_ops;
1742
1743	const struct btf_type *type;
1744	const struct btf_type *value_type;
1745	u32 type_id;
1746	u32 value_id;
1747
1748	/* Collection of argument information for each member */
1749	struct bpf_struct_ops_arg_info *arg_info;
1750	};
1751
1752	enum bpf_struct_ops_state {
1753	BPF_STRUCT_OPS_STATE_INIT,
1754	BPF_STRUCT_OPS_STATE_INUSE,
1755	BPF_STRUCT_OPS_STATE_TOBEFREE,
1756	BPF_STRUCT_OPS_STATE_READY,
1757	};
1758
1759	struct bpf_struct_ops_common_value {
1760	refcount_t refcnt;
1761	enum bpf_struct_ops_state state;
1762	};
1763
1764	#if defined(CONFIG_BPF_JIT) && defined(CONFIG_BPF_SYSCALL)
1765	/* This macro helps developer to register a struct_ops type and generate
1766	* type information correctly. Developers should use this macro to register
1767	* a struct_ops type instead of calling __register_bpf_struct_ops() directly.
1768	*/
1769	#define register_bpf_struct_ops(st_ops, type) \
1770	({ \
1771	struct bpf_struct_ops_##type { \
1772	struct bpf_struct_ops_common_value common; \
1773	struct type data ____cacheline_aligned_in_smp; \
1774	}; \
1775	BTF_TYPE_EMIT(struct bpf_struct_ops_##type); \
1776	__register_bpf_struct_ops(st_ops); \
1777	})
1778	#define BPF_MODULE_OWNER ((void *)((0xeB9FUL << 2) + POISON_POINTER_DELTA))
1779	bool bpf_struct_ops_get(const void *kdata);
1780	void bpf_struct_ops_put(const void *kdata);
1781	int bpf_struct_ops_map_sys_lookup_elem(struct bpf_map *map, void *key,
1782	void *value);
1783	int bpf_struct_ops_prepare_trampoline(struct bpf_tramp_links *tlinks,
1784	struct bpf_tramp_link *link,
1785	const struct btf_func_model *model,
1786	void *stub_func,
1787	void **image, u32 *image_off,
1788	bool allow_alloc);
1789	void bpf_struct_ops_image_free(void *image);
1790	static inline bool bpf_try_module_get(const void *data, struct module *owner)
1791	{
1792	if (owner == BPF_MODULE_OWNER)
1793	return bpf_struct_ops_get(kdata: data);
1794	else
1795	return try_module_get(module: owner);
1796	}
1797	static inline void bpf_module_put(const void *data, struct module *owner)
1798	{
1799	if (owner == BPF_MODULE_OWNER)
1800	bpf_struct_ops_put(kdata: data);
1801	else
1802	module_put(module: owner);
1803	}
1804	int bpf_struct_ops_link_create(union bpf_attr *attr);
1805
1806	#ifdef CONFIG_NET
1807	/* Define it here to avoid the use of forward declaration */
1808	struct bpf_dummy_ops_state {
1809	int val;
1810	};
1811
1812	struct bpf_dummy_ops {
1813	int (*test_1)(struct bpf_dummy_ops_state *cb);
1814	int (*test_2)(struct bpf_dummy_ops_state *cb, int a1, unsigned short a2,
1815	char a3, unsigned long a4);
1816	int (*test_sleepable)(struct bpf_dummy_ops_state *cb);
1817	};
1818
1819	int bpf_struct_ops_test_run(struct bpf_prog *prog, const union bpf_attr *kattr,
1820	union bpf_attr __user *uattr);
1821	#endif
1822	int bpf_struct_ops_desc_init(struct bpf_struct_ops_desc *st_ops_desc,
1823	struct btf *btf,
1824	struct bpf_verifier_log *log);
1825	void bpf_map_struct_ops_info_fill(struct bpf_map_info *info, struct bpf_map *map);
1826	void bpf_struct_ops_desc_release(struct bpf_struct_ops_desc *st_ops_desc);
1827	#else
1828	#define register_bpf_struct_ops(st_ops, type) ({ (void *)(st_ops); 0; })
1829	static inline bool bpf_try_module_get(const void *data, struct module *owner)
1830	{
1831	return try_module_get(owner);
1832	}
1833	static inline void bpf_module_put(const void *data, struct module *owner)
1834	{
1835	module_put(owner);
1836	}
1837	static inline int bpf_struct_ops_map_sys_lookup_elem(struct bpf_map *map,
1838	void *key,
1839	void *value)
1840	{
1841	return -EINVAL;
1842	}
1843	static inline int bpf_struct_ops_link_create(union bpf_attr *attr)
1844	{
1845	return -EOPNOTSUPP;
1846	}
1847	static inline void bpf_map_struct_ops_info_fill(struct bpf_map_info *info, struct bpf_map *map)
1848	{
1849	}
1850
1851	static inline void bpf_struct_ops_desc_release(struct bpf_struct_ops_desc *st_ops_desc)
1852	{
1853	}
1854
1855	#endif
1856
1857	#if defined(CONFIG_CGROUP_BPF) && defined(CONFIG_BPF_LSM)
1858	int bpf_trampoline_link_cgroup_shim(struct bpf_prog *prog,
1859	int cgroup_atype);
1860	void bpf_trampoline_unlink_cgroup_shim(struct bpf_prog *prog);
1861	#else
1862	static inline int bpf_trampoline_link_cgroup_shim(struct bpf_prog *prog,
1863	int cgroup_atype)
1864	{
1865	return -EOPNOTSUPP;
1866	}
1867	static inline void bpf_trampoline_unlink_cgroup_shim(struct bpf_prog *prog)
1868	{
1869	}
1870	#endif
1871
1872	struct bpf_array {
1873	struct bpf_map map;
1874	u32 elem_size;
1875	u32 index_mask;
1876	struct bpf_array_aux *aux;
1877	union {
1878	DECLARE_FLEX_ARRAY(char, value) __aligned(8);
1879	DECLARE_FLEX_ARRAY(void *, ptrs) __aligned(8);
1880	DECLARE_FLEX_ARRAY(void __percpu *, pptrs) __aligned(8);
1881	};
1882	};
1883
1884	#define BPF_COMPLEXITY_LIMIT_INSNS 1000000 /* yes. 1M insns */
1885	#define MAX_TAIL_CALL_CNT 33
1886
1887	/* Maximum number of loops for bpf_loop and bpf_iter_num.
1888	* It's enum to expose it (and thus make it discoverable) through BTF.
1889	*/
1890	enum {
1891	BPF_MAX_LOOPS = 8 * 1024 * 1024,
1892	};
1893
1894	#define BPF_F_ACCESS_MASK (BPF_F_RDONLY | \
1895	BPF_F_RDONLY_PROG | \
1896	BPF_F_WRONLY | \
1897	BPF_F_WRONLY_PROG)
1898
1899	#define BPF_MAP_CAN_READ BIT(0)
1900	#define BPF_MAP_CAN_WRITE BIT(1)
1901
1902	/* Maximum number of user-producer ring buffer samples that can be drained in
1903	* a call to bpf_user_ringbuf_drain().
1904	*/
1905	#define BPF_MAX_USER_RINGBUF_SAMPLES (128 * 1024)
1906
1907	static inline u32 bpf_map_flags_to_cap(struct bpf_map *map)
1908	{
1909	u32 access_flags = map->map_flags & (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG);
1910
1911	/* Combination of BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG is
1912	* not possible.
1913	*/
1914	if (access_flags & BPF_F_RDONLY_PROG)
1915	return BPF_MAP_CAN_READ;
1916	else if (access_flags & BPF_F_WRONLY_PROG)
1917	return BPF_MAP_CAN_WRITE;
1918	else
1919	return BPF_MAP_CAN_READ | BPF_MAP_CAN_WRITE;
1920	}
1921
1922	static inline bool bpf_map_flags_access_ok(u32 access_flags)
1923	{
1924	return (access_flags & (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG)) !=
1925	(BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG);
1926	}
1927
1928	struct bpf_event_entry {
1929	struct perf_event *event;
1930	struct file *perf_file;
1931	struct file *map_file;
1932	struct rcu_head rcu;
1933	};
1934
1935	static inline bool map_type_contains_progs(struct bpf_map *map)
1936	{
1937	return map->map_type == BPF_MAP_TYPE_PROG_ARRAY ||
1938	map->map_type == BPF_MAP_TYPE_DEVMAP ||
1939	map->map_type == BPF_MAP_TYPE_CPUMAP;
1940	}
1941
1942	bool bpf_prog_map_compatible(struct bpf_map *map, const struct bpf_prog *fp);
1943	int bpf_prog_calc_tag(struct bpf_prog *fp);
1944
1945	const struct bpf_func_proto *bpf_get_trace_printk_proto(void);
1946	const struct bpf_func_proto *bpf_get_trace_vprintk_proto(void);
1947
1948	typedef unsigned long (*bpf_ctx_copy_t)(void *dst, const void *src,
1949	unsigned long off, unsigned long len);
1950	typedef u32 (*bpf_convert_ctx_access_t)(enum bpf_access_type type,
1951	const struct bpf_insn *src,
1952	struct bpf_insn *dst,
1953	struct bpf_prog *prog,
1954	u32 *target_size);
1955
1956	u64 bpf_event_output(struct bpf_map *map, u64 flags, void *meta, u64 meta_size,
1957	void *ctx, u64 ctx_size, bpf_ctx_copy_t ctx_copy);
1958
1959	/* an array of programs to be executed under rcu_lock.
1960	*
1961	* Typical usage:
1962	* ret = bpf_prog_run_array(rcu_dereference(&bpf_prog_array), ctx, bpf_prog_run);
1963	*
1964	* the structure returned by bpf_prog_array_alloc() should be populated
1965	* with program pointers and the last pointer must be NULL.
1966	* The user has to keep refcnt on the program and make sure the program
1967	* is removed from the array before bpf_prog_put().
1968	* The 'struct bpf_prog_array *' should only be replaced with xchg()
1969	* since other cpus are walking the array of pointers in parallel.
1970	*/
1971	struct bpf_prog_array_item {
1972	struct bpf_prog *prog;
1973	union {
1974	struct bpf_cgroup_storage *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE];
1975	u64 bpf_cookie;
1976	};
1977	};
1978
1979	struct bpf_prog_array {
1980	struct rcu_head rcu;
1981	struct bpf_prog_array_item items[];
1982	};
1983
1984	struct bpf_empty_prog_array {
1985	struct bpf_prog_array hdr;
1986	struct bpf_prog *null_prog;
1987	};
1988
1989	/* to avoid allocating empty bpf_prog_array for cgroups that
1990	* don't have bpf program attached use one global 'bpf_empty_prog_array'
1991	* It will not be modified the caller of bpf_prog_array_alloc()
1992	* (since caller requested prog_cnt == 0)
1993	* that pointer should be 'freed' by bpf_prog_array_free()
1994	*/
1995	extern struct bpf_empty_prog_array bpf_empty_prog_array;
1996
1997	struct bpf_prog_array *bpf_prog_array_alloc(u32 prog_cnt, gfp_t flags);
1998	void bpf_prog_array_free(struct bpf_prog_array *progs);
1999	/* Use when traversal over the bpf_prog_array uses tasks_trace rcu */
2000	void bpf_prog_array_free_sleepable(struct bpf_prog_array *progs);
2001	int bpf_prog_array_length(struct bpf_prog_array *progs);
2002	bool bpf_prog_array_is_empty(struct bpf_prog_array *array);
2003	int bpf_prog_array_copy_to_user(struct bpf_prog_array *progs,
2004	__u32 __user *prog_ids, u32 cnt);
2005
2006	void bpf_prog_array_delete_safe(struct bpf_prog_array *progs,
2007	struct bpf_prog *old_prog);
2008	int bpf_prog_array_delete_safe_at(struct bpf_prog_array *array, int index);
2009	int bpf_prog_array_update_at(struct bpf_prog_array *array, int index,
2010	struct bpf_prog *prog);
2011	int bpf_prog_array_copy_info(struct bpf_prog_array *array,
2012	u32 *prog_ids, u32 request_cnt,
2013	u32 *prog_cnt);
2014	int bpf_prog_array_copy(struct bpf_prog_array *old_array,
2015	struct bpf_prog *exclude_prog,
2016	struct bpf_prog *include_prog,
2017	u64 bpf_cookie,
2018	struct bpf_prog_array **new_array);
2019
2020	struct bpf_run_ctx {};
2021
2022	struct bpf_cg_run_ctx {
2023	struct bpf_run_ctx run_ctx;
2024	const struct bpf_prog_array_item *prog_item;
2025	int retval;
2026	};
2027
2028	struct bpf_trace_run_ctx {
2029	struct bpf_run_ctx run_ctx;
2030	u64 bpf_cookie;
2031	bool is_uprobe;
2032	};
2033
2034	struct bpf_tramp_run_ctx {
2035	struct bpf_run_ctx run_ctx;
2036	u64 bpf_cookie;
2037	struct bpf_run_ctx *saved_run_ctx;
2038	};
2039
2040	static inline struct bpf_run_ctx *bpf_set_run_ctx(struct bpf_run_ctx *new_ctx)
2041	{
2042	struct bpf_run_ctx *old_ctx = NULL;
2043
2044	#ifdef CONFIG_BPF_SYSCALL
2045	old_ctx = current->bpf_ctx;
2046	current->bpf_ctx = new_ctx;
2047	#endif
2048	return old_ctx;
2049	}
2050
2051	static inline void bpf_reset_run_ctx(struct bpf_run_ctx *old_ctx)
2052	{
2053	#ifdef CONFIG_BPF_SYSCALL
2054	current->bpf_ctx = old_ctx;
2055	#endif
2056	}
2057
2058	/* BPF program asks to bypass CAP_NET_BIND_SERVICE in bind. */
2059	#define BPF_RET_BIND_NO_CAP_NET_BIND_SERVICE (1 << 0)
2060	/* BPF program asks to set CN on the packet. */
2061	#define BPF_RET_SET_CN (1 << 0)
2062
2063	typedef u32 (*bpf_prog_run_fn)(const struct bpf_prog *prog, const void *ctx);
2064
2065	static __always_inline u32
2066	bpf_prog_run_array(const struct bpf_prog_array *array,
2067	const void *ctx, bpf_prog_run_fn run_prog)
2068	{
2069	const struct bpf_prog_array_item *item;
2070	const struct bpf_prog *prog;
2071	struct bpf_run_ctx *old_run_ctx;
2072	struct bpf_trace_run_ctx run_ctx;
2073	u32 ret = 1;
2074
2075	RCU_LOCKDEP_WARN(!rcu_read_lock_held(), "no rcu lock held");
2076
2077	if (unlikely(!array))
2078	return ret;
2079
2080	run_ctx.is_uprobe = false;
2081
2082	migrate_disable();
2083	old_run_ctx = bpf_set_run_ctx(new_ctx: &run_ctx.run_ctx);
2084	item = &array->items[0];
2085	while ((prog = READ_ONCE(item->prog))) {
2086	run_ctx.bpf_cookie = item->bpf_cookie;
2087	ret &= run_prog(prog, ctx);
2088	item++;
2089	}
2090	bpf_reset_run_ctx(old_ctx: old_run_ctx);
2091	migrate_enable();
2092	return ret;
2093	}
2094
2095	/* Notes on RCU design for bpf_prog_arrays containing sleepable programs:
2096	*
2097	* We use the tasks_trace rcu flavor read section to protect the bpf_prog_array
2098	* overall. As a result, we must use the bpf_prog_array_free_sleepable
2099	* in order to use the tasks_trace rcu grace period.
2100	*
2101	* When a non-sleepable program is inside the array, we take the rcu read
2102	* section and disable preemption for that program alone, so it can access
2103	* rcu-protected dynamically sized maps.
2104	*/
2105	static __always_inline u32
2106	bpf_prog_run_array_uprobe(const struct bpf_prog_array __rcu *array_rcu,
2107	const void *ctx, bpf_prog_run_fn run_prog)
2108	{
2109	const struct bpf_prog_array_item *item;
2110	const struct bpf_prog *prog;
2111	const struct bpf_prog_array *array;
2112	struct bpf_run_ctx *old_run_ctx;
2113	struct bpf_trace_run_ctx run_ctx;
2114	u32 ret = 1;
2115
2116	might_fault();
2117
2118	rcu_read_lock_trace();
2119	migrate_disable();
2120
2121	run_ctx.is_uprobe = true;
2122
2123	array = rcu_dereference_check(array_rcu, rcu_read_lock_trace_held());
2124	if (unlikely(!array))
2125	goto out;
2126	old_run_ctx = bpf_set_run_ctx(new_ctx: &run_ctx.run_ctx);
2127	item = &array->items[0];
2128	while ((prog = READ_ONCE(item->prog))) {
2129	if (!prog->sleepable)
2130	rcu_read_lock();
2131
2132	run_ctx.bpf_cookie = item->bpf_cookie;
2133	ret &= run_prog(prog, ctx);
2134	item++;
2135
2136	if (!prog->sleepable)
2137	rcu_read_unlock();
2138	}
2139	bpf_reset_run_ctx(old_ctx: old_run_ctx);
2140	out:
2141	migrate_enable();
2142	rcu_read_unlock_trace();
2143	return ret;
2144	}
2145
2146	#ifdef CONFIG_BPF_SYSCALL
2147	DECLARE_PER_CPU(int, bpf_prog_active);
2148	extern struct mutex bpf_stats_enabled_mutex;
2149
2150	/*
2151	* Block execution of BPF programs attached to instrumentation (perf,
2152	* kprobes, tracepoints) to prevent deadlocks on map operations as any of
2153	* these events can happen inside a region which holds a map bucket lock
2154	* and can deadlock on it.
2155	*/
2156	static inline void bpf_disable_instrumentation(void)
2157	{
2158	migrate_disable();
2159	this_cpu_inc(bpf_prog_active);
2160	}
2161
2162	static inline void bpf_enable_instrumentation(void)
2163	{
2164	this_cpu_dec(bpf_prog_active);
2165	migrate_enable();
2166	}
2167
2168	extern const struct super_operations bpf_super_ops;
2169	extern const struct file_operations bpf_map_fops;
2170	extern const struct file_operations bpf_prog_fops;
2171	extern const struct file_operations bpf_iter_fops;
2172
2173	#define BPF_PROG_TYPE(_id, _name, prog_ctx_type, kern_ctx_type) \
2174	extern const struct bpf_prog_ops _name ## _prog_ops; \
2175	extern const struct bpf_verifier_ops _name ## _verifier_ops;
2176	#define BPF_MAP_TYPE(_id, _ops) \
2177	extern const struct bpf_map_ops _ops;
2178	#define BPF_LINK_TYPE(_id, _name)
2179	#include <linux/bpf_types.h>
2180	#undef BPF_PROG_TYPE
2181	#undef BPF_MAP_TYPE
2182	#undef BPF_LINK_TYPE
2183
2184	extern const struct bpf_prog_ops bpf_offload_prog_ops;
2185	extern const struct bpf_verifier_ops tc_cls_act_analyzer_ops;
2186	extern const struct bpf_verifier_ops xdp_analyzer_ops;
2187
2188	struct bpf_prog *bpf_prog_get(u32 ufd);
2189	struct bpf_prog *bpf_prog_get_type_dev(u32 ufd, enum bpf_prog_type type,
2190	bool attach_drv);
2191	void bpf_prog_add(struct bpf_prog *prog, int i);
2192	void bpf_prog_sub(struct bpf_prog *prog, int i);
2193	void bpf_prog_inc(struct bpf_prog *prog);
2194	struct bpf_prog * __must_check bpf_prog_inc_not_zero(struct bpf_prog *prog);
2195	void bpf_prog_put(struct bpf_prog *prog);
2196
2197	void bpf_prog_free_id(struct bpf_prog *prog);
2198	void bpf_map_free_id(struct bpf_map *map);
2199
2200	struct btf_field *btf_record_find(const struct btf_record *rec,
2201	u32 offset, u32 field_mask);
2202	void btf_record_free(struct btf_record *rec);
2203	void bpf_map_free_record(struct bpf_map *map);
2204	struct btf_record *btf_record_dup(const struct btf_record *rec);
2205	bool btf_record_equal(const struct btf_record *rec_a, const struct btf_record *rec_b);
2206	void bpf_obj_free_timer(const struct btf_record *rec, void *obj);
2207	void bpf_obj_free_fields(const struct btf_record *rec, void *obj);
2208	void __bpf_obj_drop_impl(void *p, const struct btf_record *rec, bool percpu);
2209
2210	struct bpf_map *bpf_map_get(u32 ufd);
2211	struct bpf_map *bpf_map_get_with_uref(u32 ufd);
2212	struct bpf_map *__bpf_map_get(struct fd f);
2213	void bpf_map_inc(struct bpf_map *map);
2214	void bpf_map_inc_with_uref(struct bpf_map *map);
2215	struct bpf_map *__bpf_map_inc_not_zero(struct bpf_map *map, bool uref);
2216	struct bpf_map * __must_check bpf_map_inc_not_zero(struct bpf_map *map);
2217	void bpf_map_put_with_uref(struct bpf_map *map);
2218	void bpf_map_put(struct bpf_map *map);
2219	void *bpf_map_area_alloc(u64 size, int numa_node);
2220	void *bpf_map_area_mmapable_alloc(u64 size, int numa_node);
2221	void bpf_map_area_free(void *base);
2222	bool bpf_map_write_active(const struct bpf_map *map);
2223	void bpf_map_init_from_attr(struct bpf_map *map, union bpf_attr *attr);
2224	int generic_map_lookup_batch(struct bpf_map *map,
2225	const union bpf_attr *attr,
2226	union bpf_attr __user *uattr);
2227	int generic_map_update_batch(struct bpf_map *map, struct file *map_file,
2228	const union bpf_attr *attr,
2229	union bpf_attr __user *uattr);
2230	int generic_map_delete_batch(struct bpf_map *map,
2231	const union bpf_attr *attr,
2232	union bpf_attr __user *uattr);
2233	struct bpf_map *bpf_map_get_curr_or_next(u32 *id);
2234	struct bpf_prog *bpf_prog_get_curr_or_next(u32 *id);
2235
2236	int bpf_map_alloc_pages(const struct bpf_map *map, gfp_t gfp, int nid,
2237	unsigned long nr_pages, struct page **page_array);
2238	#ifdef CONFIG_MEMCG_KMEM
2239	void *bpf_map_kmalloc_node(const struct bpf_map *map, size_t size, gfp_t flags,
2240	int node);
2241	void *bpf_map_kzalloc(const struct bpf_map *map, size_t size, gfp_t flags);
2242	void *bpf_map_kvcalloc(struct bpf_map *map, size_t n, size_t size,
2243	gfp_t flags);
2244	void __percpu *bpf_map_alloc_percpu(const struct bpf_map *map, size_t size,
2245	size_t align, gfp_t flags);
2246	#else
2247	static inline void *
2248	bpf_map_kmalloc_node(const struct bpf_map *map, size_t size, gfp_t flags,
2249	int node)
2250	{
2251	return kmalloc_node(size, flags, node);
2252	}
2253
2254	static inline void *
2255	bpf_map_kzalloc(const struct bpf_map *map, size_t size, gfp_t flags)
2256	{
2257	return kzalloc(size, flags);
2258	}
2259
2260	static inline void *
2261	bpf_map_kvcalloc(struct bpf_map *map, size_t n, size_t size, gfp_t flags)
2262	{
2263	return kvcalloc(n, size, flags);
2264	}
2265
2266	static inline void __percpu *
2267	bpf_map_alloc_percpu(const struct bpf_map *map, size_t size, size_t align,
2268	gfp_t flags)
2269	{
2270	return __alloc_percpu_gfp(size, align, flags);
2271	}
2272	#endif
2273
2274	static inline int
2275	bpf_map_init_elem_count(struct bpf_map *map)
2276	{
2277	size_t size = sizeof(*map->elem_count), align = size;
2278	gfp_t flags = GFP_USER | __GFP_NOWARN;
2279
2280	map->elem_count = bpf_map_alloc_percpu(map, size, align, flags);
2281	if (!map->elem_count)
2282	return -ENOMEM;
2283
2284	return 0;
2285	}
2286
2287	static inline void
2288	bpf_map_free_elem_count(struct bpf_map *map)
2289	{
2290	free_percpu(pdata: map->elem_count);
2291	}
2292
2293	static inline void bpf_map_inc_elem_count(struct bpf_map *map)
2294	{
2295	this_cpu_inc(*map->elem_count);
2296	}
2297
2298	static inline void bpf_map_dec_elem_count(struct bpf_map *map)
2299	{
2300	this_cpu_dec(*map->elem_count);
2301	}
2302
2303	extern int sysctl_unprivileged_bpf_disabled;
2304
2305	bool bpf_token_capable(const struct bpf_token *token, int cap);
2306
2307	static inline bool bpf_allow_ptr_leaks(const struct bpf_token *token)
2308	{
2309	return bpf_token_capable(token, CAP_PERFMON);
2310	}
2311
2312	static inline bool bpf_allow_uninit_stack(const struct bpf_token *token)
2313	{
2314	return bpf_token_capable(token, CAP_PERFMON);
2315	}
2316
2317	static inline bool bpf_bypass_spec_v1(const struct bpf_token *token)
2318	{
2319	return cpu_mitigations_off() || bpf_token_capable(token, CAP_PERFMON);
2320	}
2321
2322	static inline bool bpf_bypass_spec_v4(const struct bpf_token *token)
2323	{
2324	return cpu_mitigations_off() || bpf_token_capable(token, CAP_PERFMON);
2325	}
2326
2327	int bpf_map_new_fd(struct bpf_map *map, int flags);
2328	int bpf_prog_new_fd(struct bpf_prog *prog);
2329
2330	void bpf_link_init(struct bpf_link *link, enum bpf_link_type type,
2331	const struct bpf_link_ops *ops, struct bpf_prog *prog);
2332	int bpf_link_prime(struct bpf_link *link, struct bpf_link_primer *primer);
2333	int bpf_link_settle(struct bpf_link_primer *primer);
2334	void bpf_link_cleanup(struct bpf_link_primer *primer);
2335	void bpf_link_inc(struct bpf_link *link);
2336	void bpf_link_put(struct bpf_link *link);
2337	int bpf_link_new_fd(struct bpf_link *link);
2338	struct bpf_link *bpf_link_get_from_fd(u32 ufd);
2339	struct bpf_link *bpf_link_get_curr_or_next(u32 *id);
2340
2341	void bpf_token_inc(struct bpf_token *token);
2342	void bpf_token_put(struct bpf_token *token);
2343	int bpf_token_create(union bpf_attr *attr);
2344	struct bpf_token *bpf_token_get_from_fd(u32 ufd);
2345
2346	bool bpf_token_allow_cmd(const struct bpf_token *token, enum bpf_cmd cmd);
2347	bool bpf_token_allow_map_type(const struct bpf_token *token, enum bpf_map_type type);
2348	bool bpf_token_allow_prog_type(const struct bpf_token *token,
2349	enum bpf_prog_type prog_type,
2350	enum bpf_attach_type attach_type);
2351
2352	int bpf_obj_pin_user(u32 ufd, int path_fd, const char __user *pathname);
2353	int bpf_obj_get_user(int path_fd, const char __user *pathname, int flags);
2354	struct inode *bpf_get_inode(struct super_block *sb, const struct inode *dir,
2355	umode_t mode);
2356
2357	#define BPF_ITER_FUNC_PREFIX "bpf_iter_"
2358	#define DEFINE_BPF_ITER_FUNC(target, args...) \
2359	extern int bpf_iter_ ## target(args); \
2360	int __init bpf_iter_ ## target(args) { return 0; }
2361
2362	/*
2363	* The task type of iterators.
2364	*
2365	* For BPF task iterators, they can be parameterized with various
2366	* parameters to visit only some of tasks.
2367	*
2368	* BPF_TASK_ITER_ALL (default)
2369	* Iterate over resources of every task.
2370	*
2371	* BPF_TASK_ITER_TID
2372	* Iterate over resources of a task/tid.
2373	*
2374	* BPF_TASK_ITER_TGID
2375	* Iterate over resources of every task of a process / task group.
2376	*/
2377	enum bpf_iter_task_type {
2378	BPF_TASK_ITER_ALL = 0,
2379	BPF_TASK_ITER_TID,
2380	BPF_TASK_ITER_TGID,
2381	};
2382
2383	struct bpf_iter_aux_info {
2384	/* for map_elem iter */
2385	struct bpf_map *map;
2386
2387	/* for cgroup iter */
2388	struct {
2389	struct cgroup *start; /* starting cgroup */
2390	enum bpf_cgroup_iter_order order;
2391	} cgroup;
2392	struct {
2393	enum bpf_iter_task_type type;
2394	u32 pid;
2395	} task;
2396	};
2397
2398	typedef int (*bpf_iter_attach_target_t)(struct bpf_prog *prog,
2399	union bpf_iter_link_info *linfo,
2400	struct bpf_iter_aux_info *aux);
2401	typedef void (*bpf_iter_detach_target_t)(struct bpf_iter_aux_info *aux);
2402	typedef void (*bpf_iter_show_fdinfo_t) (const struct bpf_iter_aux_info *aux,
2403	struct seq_file *seq);
2404	typedef int (*bpf_iter_fill_link_info_t)(const struct bpf_iter_aux_info *aux,
2405	struct bpf_link_info *info);
2406	typedef const struct bpf_func_proto *
2407	(*bpf_iter_get_func_proto_t)(enum bpf_func_id func_id,
2408	const struct bpf_prog *prog);
2409
2410	enum bpf_iter_feature {
2411	BPF_ITER_RESCHED = BIT(0),
2412	};
2413
2414	#define BPF_ITER_CTX_ARG_MAX 2
2415	struct bpf_iter_reg {
2416	const char *target;
2417	bpf_iter_attach_target_t attach_target;
2418	bpf_iter_detach_target_t detach_target;
2419	bpf_iter_show_fdinfo_t show_fdinfo;
2420	bpf_iter_fill_link_info_t fill_link_info;
2421	bpf_iter_get_func_proto_t get_func_proto;
2422	u32 ctx_arg_info_size;
2423	u32 feature;
2424	struct bpf_ctx_arg_aux ctx_arg_info[BPF_ITER_CTX_ARG_MAX];
2425	const struct bpf_iter_seq_info *seq_info;
2426	};
2427
2428	struct bpf_iter_meta {
2429	__bpf_md_ptr(struct seq_file *, seq);
2430	u64 session_id;
2431	u64 seq_num;
2432	};
2433
2434	struct bpf_iter__bpf_map_elem {
2435	__bpf_md_ptr(struct bpf_iter_meta *, meta);
2436	__bpf_md_ptr(struct bpf_map *, map);
2437	__bpf_md_ptr(void *, key);
2438	__bpf_md_ptr(void *, value);
2439	};
2440
2441	int bpf_iter_reg_target(const struct bpf_iter_reg *reg_info);
2442	void bpf_iter_unreg_target(const struct bpf_iter_reg *reg_info);
2443	bool bpf_iter_prog_supported(struct bpf_prog *prog);
2444	const struct bpf_func_proto *
2445	bpf_iter_get_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog);
2446	int bpf_iter_link_attach(const union bpf_attr *attr, bpfptr_t uattr, struct bpf_prog *prog);
2447	int bpf_iter_new_fd(struct bpf_link *link);
2448	bool bpf_link_is_iter(struct bpf_link *link);
2449	struct bpf_prog *bpf_iter_get_info(struct bpf_iter_meta *meta, bool in_stop);
2450	int bpf_iter_run_prog(struct bpf_prog *prog, void *ctx);
2451	void bpf_iter_map_show_fdinfo(const struct bpf_iter_aux_info *aux,
2452	struct seq_file *seq);
2453	int bpf_iter_map_fill_link_info(const struct bpf_iter_aux_info *aux,
2454	struct bpf_link_info *info);
2455
2456	int map_set_for_each_callback_args(struct bpf_verifier_env *env,
2457	struct bpf_func_state *caller,
2458	struct bpf_func_state *callee);
2459
2460	int bpf_percpu_hash_copy(struct bpf_map *map, void *key, void *value);
2461	int bpf_percpu_array_copy(struct bpf_map *map, void *key, void *value);
2462	int bpf_percpu_hash_update(struct bpf_map *map, void *key, void *value,
2463	u64 flags);
2464	int bpf_percpu_array_update(struct bpf_map *map, void *key, void *value,
2465	u64 flags);
2466
2467	int bpf_stackmap_copy(struct bpf_map *map, void *key, void *value);
2468
2469	int bpf_fd_array_map_update_elem(struct bpf_map *map, struct file *map_file,
2470	void *key, void *value, u64 map_flags);
2471	int bpf_fd_array_map_lookup_elem(struct bpf_map *map, void *key, u32 *value);
2472	int bpf_fd_htab_map_update_elem(struct bpf_map *map, struct file *map_file,
2473	void *key, void *value, u64 map_flags);
2474	int bpf_fd_htab_map_lookup_elem(struct bpf_map *map, void *key, u32 *value);
2475
2476	int bpf_get_file_flag(int flags);
2477	int bpf_check_uarg_tail_zero(bpfptr_t uaddr, size_t expected_size,
2478	size_t actual_size);
2479
2480	/* verify correctness of eBPF program */
2481	int bpf_check(struct bpf_prog **fp, union bpf_attr *attr, bpfptr_t uattr, u32 uattr_size);
2482
2483	#ifndef CONFIG_BPF_JIT_ALWAYS_ON
2484	void bpf_patch_call_args(struct bpf_insn *insn, u32 stack_depth);
2485	#endif
2486
2487	struct btf *bpf_get_btf_vmlinux(void);
2488
2489	/* Map specifics */
2490	struct xdp_frame;
2491	struct sk_buff;
2492	struct bpf_dtab_netdev;
2493	struct bpf_cpu_map_entry;
2494
2495	void __dev_flush(void);
2496	int dev_xdp_enqueue(struct net_device *dev, struct xdp_frame *xdpf,
2497	struct net_device *dev_rx);
2498	int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_frame *xdpf,
2499	struct net_device *dev_rx);
2500	int dev_map_enqueue_multi(struct xdp_frame *xdpf, struct net_device *dev_rx,
2501	struct bpf_map *map, bool exclude_ingress);
2502	int dev_map_generic_redirect(struct bpf_dtab_netdev *dst, struct sk_buff *skb,
2503	struct bpf_prog *xdp_prog);
2504	int dev_map_redirect_multi(struct net_device *dev, struct sk_buff *skb,
2505	struct bpf_prog *xdp_prog, struct bpf_map *map,
2506	bool exclude_ingress);
2507
2508	void __cpu_map_flush(void);
2509	int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu, struct xdp_frame *xdpf,
2510	struct net_device *dev_rx);
2511	int cpu_map_generic_redirect(struct bpf_cpu_map_entry *rcpu,
2512	struct sk_buff *skb);
2513
2514	/* Return map's numa specified by userspace */
2515	static inline int bpf_map_attr_numa_node(const union bpf_attr *attr)
2516	{
2517	return (attr->map_flags & BPF_F_NUMA_NODE) ?
2518	attr->numa_node : NUMA_NO_NODE;
2519	}
2520
2521	struct bpf_prog *bpf_prog_get_type_path(const char *name, enum bpf_prog_type type);
2522	int array_map_alloc_check(union bpf_attr *attr);
2523
2524	int bpf_prog_test_run_xdp(struct bpf_prog *prog, const union bpf_attr *kattr,
2525	union bpf_attr __user *uattr);
2526	int bpf_prog_test_run_skb(struct bpf_prog *prog, const union bpf_attr *kattr,
2527	union bpf_attr __user *uattr);
2528	int bpf_prog_test_run_tracing(struct bpf_prog *prog,
2529	const union bpf_attr *kattr,
2530	union bpf_attr __user *uattr);
2531	int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog,
2532	const union bpf_attr *kattr,
2533	union bpf_attr __user *uattr);
2534	int bpf_prog_test_run_raw_tp(struct bpf_prog *prog,
2535	const union bpf_attr *kattr,
2536	union bpf_attr __user *uattr);
2537	int bpf_prog_test_run_sk_lookup(struct bpf_prog *prog,
2538	const union bpf_attr *kattr,
2539	union bpf_attr __user *uattr);
2540	int bpf_prog_test_run_nf(struct bpf_prog *prog,
2541	const union bpf_attr *kattr,
2542	union bpf_attr __user *uattr);
2543	bool btf_ctx_access(int off, int size, enum bpf_access_type type,
2544	const struct bpf_prog *prog,
2545	struct bpf_insn_access_aux *info);
2546
2547	static inline bool bpf_tracing_ctx_access(int off, int size,
2548	enum bpf_access_type type)
2549	{
2550	if (off < 0 || off >= sizeof(__u64) * MAX_BPF_FUNC_ARGS)
2551	return false;
2552	if (type != BPF_READ)
2553	return false;
2554	if (off % size != 0)
2555	return false;
2556	return true;
2557	}
2558
2559	static inline bool bpf_tracing_btf_ctx_access(int off, int size,
2560	enum bpf_access_type type,
2561	const struct bpf_prog *prog,
2562	struct bpf_insn_access_aux *info)
2563	{
2564	if (!bpf_tracing_ctx_access(off, size, type))
2565	return false;
2566	return btf_ctx_access(off, size, type, prog, info);
2567	}
2568
2569	int btf_struct_access(struct bpf_verifier_log *log,
2570	const struct bpf_reg_state *reg,
2571	int off, int size, enum bpf_access_type atype,
2572	u32 *next_btf_id, enum bpf_type_flag *flag, const char **field_name);
2573	bool btf_struct_ids_match(struct bpf_verifier_log *log,
2574	const struct btf *btf, u32 id, int off,
2575	const struct btf *need_btf, u32 need_type_id,
2576	bool strict);
2577
2578	int btf_distill_func_proto(struct bpf_verifier_log *log,
2579	struct btf *btf,
2580	const struct btf_type *func_proto,
2581	const char *func_name,
2582	struct btf_func_model *m);
2583
2584	struct bpf_reg_state;
2585	int btf_prepare_func_args(struct bpf_verifier_env *env, int subprog);
2586	int btf_check_type_match(struct bpf_verifier_log *log, const struct bpf_prog *prog,
2587	struct btf *btf, const struct btf_type *t);
2588	const char *btf_find_decl_tag_value(const struct btf *btf, const struct btf_type *pt,
2589	int comp_idx, const char *tag_key);
2590	int btf_find_next_decl_tag(const struct btf *btf, const struct btf_type *pt,
2591	int comp_idx, const char *tag_key, int last_id);
2592
2593	struct bpf_prog *bpf_prog_by_id(u32 id);
2594	struct bpf_link *bpf_link_by_id(u32 id);
2595
2596	const struct bpf_func_proto *bpf_base_func_proto(enum bpf_func_id func_id,
2597	const struct bpf_prog *prog);
2598	void bpf_task_storage_free(struct task_struct *task);
2599	void bpf_cgrp_storage_free(struct cgroup *cgroup);
2600	bool bpf_prog_has_kfunc_call(const struct bpf_prog *prog);
2601	const struct btf_func_model *
2602	bpf_jit_find_kfunc_model(const struct bpf_prog *prog,
2603	const struct bpf_insn *insn);
2604	int bpf_get_kfunc_addr(const struct bpf_prog *prog, u32 func_id,
2605	u16 btf_fd_idx, u8 **func_addr);
2606
2607	struct bpf_core_ctx {
2608	struct bpf_verifier_log *log;
2609	const struct btf *btf;
2610	};
2611
2612	bool btf_nested_type_is_trusted(struct bpf_verifier_log *log,
2613	const struct bpf_reg_state *reg,
2614	const char *field_name, u32 btf_id, const char *suffix);
2615
2616	bool btf_type_ids_nocast_alias(struct bpf_verifier_log *log,
2617	const struct btf *reg_btf, u32 reg_id,
2618	const struct btf *arg_btf, u32 arg_id);
2619
2620	int bpf_core_apply(struct bpf_core_ctx *ctx, const struct bpf_core_relo *relo,
2621	int relo_idx, void *insn);
2622
2623	static inline bool unprivileged_ebpf_enabled(void)
2624	{
2625	return !sysctl_unprivileged_bpf_disabled;
2626	}
2627
2628	/* Not all bpf prog type has the bpf_ctx.
2629	* For the bpf prog type that has initialized the bpf_ctx,
2630	* this function can be used to decide if a kernel function
2631	* is called by a bpf program.
2632	*/
2633	static inline bool has_current_bpf_ctx(void)
2634	{
2635	return !!current->bpf_ctx;
2636	}
2637
2638	void notrace bpf_prog_inc_misses_counter(struct bpf_prog *prog);
2639
2640	void bpf_dynptr_init(struct bpf_dynptr_kern *ptr, void *data,
2641	enum bpf_dynptr_type type, u32 offset, u32 size);
2642	void bpf_dynptr_set_null(struct bpf_dynptr_kern *ptr);
2643	void bpf_dynptr_set_rdonly(struct bpf_dynptr_kern *ptr);
2644
2645	bool dev_check_flush(void);
2646	bool cpu_map_check_flush(void);
2647	#else /* !CONFIG_BPF_SYSCALL */
2648	static inline struct bpf_prog *bpf_prog_get(u32 ufd)
2649	{
2650	return ERR_PTR(-EOPNOTSUPP);
2651	}
2652
2653	static inline struct bpf_prog *bpf_prog_get_type_dev(u32 ufd,
2654	enum bpf_prog_type type,
2655	bool attach_drv)
2656	{
2657	return ERR_PTR(-EOPNOTSUPP);
2658	}
2659
2660	static inline void bpf_prog_add(struct bpf_prog *prog, int i)
2661	{
2662	}
2663
2664	static inline void bpf_prog_sub(struct bpf_prog *prog, int i)
2665	{
2666	}
2667
2668	static inline void bpf_prog_put(struct bpf_prog *prog)
2669	{
2670	}
2671
2672	static inline void bpf_prog_inc(struct bpf_prog *prog)
2673	{
2674	}
2675
2676	static inline struct bpf_prog *__must_check
2677	bpf_prog_inc_not_zero(struct bpf_prog *prog)
2678	{
2679	return ERR_PTR(-EOPNOTSUPP);
2680	}
2681
2682	static inline void bpf_link_init(struct bpf_link *link, enum bpf_link_type type,
2683	const struct bpf_link_ops *ops,
2684	struct bpf_prog *prog)
2685	{
2686	}
2687
2688	static inline int bpf_link_prime(struct bpf_link *link,
2689	struct bpf_link_primer *primer)
2690	{
2691	return -EOPNOTSUPP;
2692	}
2693
2694	static inline int bpf_link_settle(struct bpf_link_primer *primer)
2695	{
2696	return -EOPNOTSUPP;
2697	}
2698
2699	static inline void bpf_link_cleanup(struct bpf_link_primer *primer)
2700	{
2701	}
2702
2703	static inline void bpf_link_inc(struct bpf_link *link)
2704	{
2705	}
2706
2707	static inline void bpf_link_put(struct bpf_link *link)
2708	{
2709	}
2710
2711	static inline int bpf_obj_get_user(const char __user *pathname, int flags)
2712	{
2713	return -EOPNOTSUPP;
2714	}
2715
2716	static inline bool bpf_token_capable(const struct bpf_token *token, int cap)
2717	{
2718	return capable(cap) || (cap != CAP_SYS_ADMIN && capable(CAP_SYS_ADMIN));
2719	}
2720
2721	static inline void bpf_token_inc(struct bpf_token *token)
2722	{
2723	}
2724
2725	static inline void bpf_token_put(struct bpf_token *token)
2726	{
2727	}
2728
2729	static inline struct bpf_token *bpf_token_get_from_fd(u32 ufd)
2730	{
2731	return ERR_PTR(-EOPNOTSUPP);
2732	}
2733
2734	static inline void __dev_flush(void)
2735	{
2736	}
2737
2738	struct xdp_frame;
2739	struct bpf_dtab_netdev;
2740	struct bpf_cpu_map_entry;
2741
2742	static inline
2743	int dev_xdp_enqueue(struct net_device *dev, struct xdp_frame *xdpf,
2744	struct net_device *dev_rx)
2745	{
2746	return 0;
2747	}
2748
2749	static inline
2750	int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_frame *xdpf,
2751	struct net_device *dev_rx)
2752	{
2753	return 0;
2754	}
2755
2756	static inline
2757	int dev_map_enqueue_multi(struct xdp_frame *xdpf, struct net_device *dev_rx,
2758	struct bpf_map *map, bool exclude_ingress)
2759	{
2760	return 0;
2761	}
2762
2763	struct sk_buff;
2764
2765	static inline int dev_map_generic_redirect(struct bpf_dtab_netdev *dst,
2766	struct sk_buff *skb,
2767	struct bpf_prog *xdp_prog)
2768	{
2769	return 0;
2770	}
2771
2772	static inline
2773	int dev_map_redirect_multi(struct net_device *dev, struct sk_buff *skb,
2774	struct bpf_prog *xdp_prog, struct bpf_map *map,
2775	bool exclude_ingress)
2776	{
2777	return 0;
2778	}
2779
2780	static inline void __cpu_map_flush(void)
2781	{
2782	}
2783
2784	static inline int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu,
2785	struct xdp_frame *xdpf,
2786	struct net_device *dev_rx)
2787	{
2788	return 0;
2789	}
2790
2791	static inline int cpu_map_generic_redirect(struct bpf_cpu_map_entry *rcpu,
2792	struct sk_buff *skb)
2793	{
2794	return -EOPNOTSUPP;
2795	}
2796
2797	static inline struct bpf_prog *bpf_prog_get_type_path(const char *name,
2798	enum bpf_prog_type type)
2799	{
2800	return ERR_PTR(-EOPNOTSUPP);
2801	}
2802
2803	static inline int bpf_prog_test_run_xdp(struct bpf_prog *prog,
2804	const union bpf_attr *kattr,
2805	union bpf_attr __user *uattr)
2806	{
2807	return -ENOTSUPP;
2808	}
2809
2810	static inline int bpf_prog_test_run_skb(struct bpf_prog *prog,
2811	const union bpf_attr *kattr,
2812	union bpf_attr __user *uattr)
2813	{
2814	return -ENOTSUPP;
2815	}
2816
2817	static inline int bpf_prog_test_run_tracing(struct bpf_prog *prog,
2818	const union bpf_attr *kattr,
2819	union bpf_attr __user *uattr)
2820	{
2821	return -ENOTSUPP;
2822	}
2823
2824	static inline int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog,
2825	const union bpf_attr *kattr,
2826	union bpf_attr __user *uattr)
2827	{
2828	return -ENOTSUPP;
2829	}
2830
2831	static inline int bpf_prog_test_run_sk_lookup(struct bpf_prog *prog,
2832	const union bpf_attr *kattr,
2833	union bpf_attr __user *uattr)
2834	{
2835	return -ENOTSUPP;
2836	}
2837
2838	static inline void bpf_map_put(struct bpf_map *map)
2839	{
2840	}
2841
2842	static inline struct bpf_prog *bpf_prog_by_id(u32 id)
2843	{
2844	return ERR_PTR(-ENOTSUPP);
2845	}
2846
2847	static inline int btf_struct_access(struct bpf_verifier_log *log,
2848	const struct bpf_reg_state *reg,
2849	int off, int size, enum bpf_access_type atype,
2850	u32 *next_btf_id, enum bpf_type_flag *flag,
2851	const char **field_name)
2852	{
2853	return -EACCES;
2854	}
2855
2856	static inline const struct bpf_func_proto *
2857	bpf_base_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog)
2858	{
2859	return NULL;
2860	}
2861
2862	static inline void bpf_task_storage_free(struct task_struct *task)
2863	{
2864	}
2865
2866	static inline bool bpf_prog_has_kfunc_call(const struct bpf_prog *prog)
2867	{
2868	return false;
2869	}
2870
2871	static inline const struct btf_func_model *
2872	bpf_jit_find_kfunc_model(const struct bpf_prog *prog,
2873	const struct bpf_insn *insn)
2874	{
2875	return NULL;
2876	}
2877
2878	static inline int
2879	bpf_get_kfunc_addr(const struct bpf_prog *prog, u32 func_id,
2880	u16 btf_fd_idx, u8 **func_addr)
2881	{
2882	return -ENOTSUPP;
2883	}
2884
2885	static inline bool unprivileged_ebpf_enabled(void)
2886	{
2887	return false;
2888	}
2889
2890	static inline bool has_current_bpf_ctx(void)
2891	{
2892	return false;
2893	}
2894
2895	static inline void bpf_prog_inc_misses_counter(struct bpf_prog *prog)
2896	{
2897	}
2898
2899	static inline void bpf_cgrp_storage_free(struct cgroup *cgroup)
2900	{
2901	}
2902
2903	static inline void bpf_dynptr_init(struct bpf_dynptr_kern *ptr, void *data,
2904	enum bpf_dynptr_type type, u32 offset, u32 size)
2905	{
2906	}
2907
2908	static inline void bpf_dynptr_set_null(struct bpf_dynptr_kern *ptr)
2909	{
2910	}
2911
2912	static inline void bpf_dynptr_set_rdonly(struct bpf_dynptr_kern *ptr)
2913	{
2914	}
2915	#endif /* CONFIG_BPF_SYSCALL */
2916
2917	static __always_inline int
2918	bpf_probe_read_kernel_common(void *dst, u32 size, const void *unsafe_ptr)
2919	{
2920	int ret = -EFAULT;
2921
2922	if (IS_ENABLED(CONFIG_BPF_EVENTS))
2923	ret = copy_from_kernel_nofault(dst, src: unsafe_ptr, size);
2924	if (unlikely(ret < 0))
2925	memset(dst, 0, size);
2926	return ret;
2927	}
2928
2929	void __bpf_free_used_btfs(struct bpf_prog_aux *aux,
2930	struct btf_mod_pair *used_btfs, u32 len);
2931
2932	static inline struct bpf_prog *bpf_prog_get_type(u32 ufd,
2933	enum bpf_prog_type type)
2934	{
2935	return bpf_prog_get_type_dev(ufd, type, attach_drv: false);
2936	}
2937
2938	void __bpf_free_used_maps(struct bpf_prog_aux *aux,
2939	struct bpf_map **used_maps, u32 len);
2940
2941	bool bpf_prog_get_ok(struct bpf_prog *, enum bpf_prog_type *, bool);
2942
2943	int bpf_prog_offload_compile(struct bpf_prog *prog);
2944	void bpf_prog_dev_bound_destroy(struct bpf_prog *prog);
2945	int bpf_prog_offload_info_fill(struct bpf_prog_info *info,
2946	struct bpf_prog *prog);
2947
2948	int bpf_map_offload_info_fill(struct bpf_map_info *info, struct bpf_map *map);
2949
2950	int bpf_map_offload_lookup_elem(struct bpf_map *map, void *key, void *value);
2951	int bpf_map_offload_update_elem(struct bpf_map *map,
2952	void *key, void *value, u64 flags);
2953	int bpf_map_offload_delete_elem(struct bpf_map *map, void *key);
2954	int bpf_map_offload_get_next_key(struct bpf_map *map,
2955	void *key, void *next_key);
2956
2957	bool bpf_offload_prog_map_match(struct bpf_prog *prog, struct bpf_map *map);
2958
2959	struct bpf_offload_dev *
2960	bpf_offload_dev_create(const struct bpf_prog_offload_ops *ops, void *priv);
2961	void bpf_offload_dev_destroy(struct bpf_offload_dev *offdev);
2962	void *bpf_offload_dev_priv(struct bpf_offload_dev *offdev);
2963	int bpf_offload_dev_netdev_register(struct bpf_offload_dev *offdev,
2964	struct net_device *netdev);
2965	void bpf_offload_dev_netdev_unregister(struct bpf_offload_dev *offdev,
2966	struct net_device *netdev);
2967	bool bpf_offload_dev_match(struct bpf_prog *prog, struct net_device *netdev);
2968
2969	void unpriv_ebpf_notify(int new_state);
2970
2971	#if defined(CONFIG_NET) && defined(CONFIG_BPF_SYSCALL)
2972	int bpf_dev_bound_kfunc_check(struct bpf_verifier_log *log,
2973	struct bpf_prog_aux *prog_aux);
2974	void *bpf_dev_bound_resolve_kfunc(struct bpf_prog *prog, u32 func_id);
2975	int bpf_prog_dev_bound_init(struct bpf_prog *prog, union bpf_attr *attr);
2976	int bpf_prog_dev_bound_inherit(struct bpf_prog *new_prog, struct bpf_prog *old_prog);
2977	void bpf_dev_bound_netdev_unregister(struct net_device *dev);
2978
2979	static inline bool bpf_prog_is_dev_bound(const struct bpf_prog_aux *aux)
2980	{
2981	return aux->dev_bound;
2982	}
2983
2984	static inline bool bpf_prog_is_offloaded(const struct bpf_prog_aux *aux)
2985	{
2986	return aux->offload_requested;
2987	}
2988
2989	bool bpf_prog_dev_bound_match(const struct bpf_prog *lhs, const struct bpf_prog *rhs);
2990
2991	static inline bool bpf_map_is_offloaded(struct bpf_map *map)
2992	{
2993	return unlikely(map->ops == &bpf_map_offload_ops);
2994	}
2995
2996	struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr);
2997	void bpf_map_offload_map_free(struct bpf_map *map);
2998	u64 bpf_map_offload_map_mem_usage(const struct bpf_map *map);
2999	int bpf_prog_test_run_syscall(struct bpf_prog *prog,
3000	const union bpf_attr *kattr,
3001	union bpf_attr __user *uattr);
3002
3003	int sock_map_get_from_fd(const union bpf_attr *attr, struct bpf_prog *prog);
3004	int sock_map_prog_detach(const union bpf_attr *attr, enum bpf_prog_type ptype);
3005	int sock_map_update_elem_sys(struct bpf_map *map, void *key, void *value, u64 flags);
3006	int sock_map_bpf_prog_query(const union bpf_attr *attr,
3007	union bpf_attr __user *uattr);
3008
3009	void sock_map_unhash(struct sock *sk);
3010	void sock_map_destroy(struct sock *sk);
3011	void sock_map_close(struct sock *sk, long timeout);
3012	#else
3013	static inline int bpf_dev_bound_kfunc_check(struct bpf_verifier_log *log,
3014	struct bpf_prog_aux *prog_aux)
3015	{
3016	return -EOPNOTSUPP;
3017	}
3018
3019	static inline void *bpf_dev_bound_resolve_kfunc(struct bpf_prog *prog,
3020	u32 func_id)
3021	{
3022	return NULL;
3023	}
3024
3025	static inline int bpf_prog_dev_bound_init(struct bpf_prog *prog,
3026	union bpf_attr *attr)
3027	{
3028	return -EOPNOTSUPP;
3029	}
3030
3031	static inline int bpf_prog_dev_bound_inherit(struct bpf_prog *new_prog,
3032	struct bpf_prog *old_prog)
3033	{
3034	return -EOPNOTSUPP;
3035	}
3036
3037	static inline void bpf_dev_bound_netdev_unregister(struct net_device *dev)
3038	{
3039	}
3040
3041	static inline bool bpf_prog_is_dev_bound(const struct bpf_prog_aux *aux)
3042	{
3043	return false;
3044	}
3045
3046	static inline bool bpf_prog_is_offloaded(struct bpf_prog_aux *aux)
3047	{
3048	return false;
3049	}
3050
3051	static inline bool bpf_prog_dev_bound_match(const struct bpf_prog *lhs, const struct bpf_prog *rhs)
3052	{
3053	return false;
3054	}
3055
3056	static inline bool bpf_map_is_offloaded(struct bpf_map *map)
3057	{
3058	return false;
3059	}
3060
3061	static inline struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr)
3062	{
3063	return ERR_PTR(-EOPNOTSUPP);
3064	}
3065
3066	static inline void bpf_map_offload_map_free(struct bpf_map *map)
3067	{
3068	}
3069
3070	static inline u64 bpf_map_offload_map_mem_usage(const struct bpf_map *map)
3071	{
3072	return 0;
3073	}
3074
3075	static inline int bpf_prog_test_run_syscall(struct bpf_prog *prog,
3076	const union bpf_attr *kattr,
3077	union bpf_attr __user *uattr)
3078	{
3079	return -ENOTSUPP;
3080	}
3081
3082	#ifdef CONFIG_BPF_SYSCALL
3083	static inline int sock_map_get_from_fd(const union bpf_attr *attr,
3084	struct bpf_prog *prog)
3085	{
3086	return -EINVAL;
3087	}
3088
3089	static inline int sock_map_prog_detach(const union bpf_attr *attr,
3090	enum bpf_prog_type ptype)
3091	{
3092	return -EOPNOTSUPP;
3093	}
3094
3095	static inline int sock_map_update_elem_sys(struct bpf_map *map, void *key, void *value,
3096	u64 flags)
3097	{
3098	return -EOPNOTSUPP;
3099	}
3100
3101	static inline int sock_map_bpf_prog_query(const union bpf_attr *attr,
3102	union bpf_attr __user *uattr)
3103	{
3104	return -EINVAL;
3105	}
3106	#endif /* CONFIG_BPF_SYSCALL */
3107	#endif /* CONFIG_NET && CONFIG_BPF_SYSCALL */
3108
3109	static __always_inline void
3110	bpf_prog_inc_misses_counters(const struct bpf_prog_array *array)
3111	{
3112	const struct bpf_prog_array_item *item;
3113	struct bpf_prog *prog;
3114
3115	if (unlikely(!array))
3116	return;
3117
3118	item = &array->items[0];
3119	while ((prog = READ_ONCE(item->prog))) {
3120	bpf_prog_inc_misses_counter(prog);
3121	item++;
3122	}
3123	}
3124
3125	#if defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL)
3126	void bpf_sk_reuseport_detach(struct sock *sk);
3127	int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map, void *key,
3128	void *value);
3129	int bpf_fd_reuseport_array_update_elem(struct bpf_map *map, void *key,
3130	void *value, u64 map_flags);
3131	#else
3132	static inline void bpf_sk_reuseport_detach(struct sock *sk)
3133	{
3134	}
3135
3136	#ifdef CONFIG_BPF_SYSCALL
3137	static inline int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map,
3138	void *key, void *value)
3139	{
3140	return -EOPNOTSUPP;
3141	}
3142
3143	static inline int bpf_fd_reuseport_array_update_elem(struct bpf_map *map,
3144	void *key, void *value,
3145	u64 map_flags)
3146	{
3147	return -EOPNOTSUPP;
3148	}
3149	#endif /* CONFIG_BPF_SYSCALL */
3150	#endif /* defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL) */
3151
3152	/* verifier prototypes for helper functions called from eBPF programs */
3153	extern const struct bpf_func_proto bpf_map_lookup_elem_proto;
3154	extern const struct bpf_func_proto bpf_map_update_elem_proto;
3155	extern const struct bpf_func_proto bpf_map_delete_elem_proto;
3156	extern const struct bpf_func_proto bpf_map_push_elem_proto;
3157	extern const struct bpf_func_proto bpf_map_pop_elem_proto;
3158	extern const struct bpf_func_proto bpf_map_peek_elem_proto;
3159	extern const struct bpf_func_proto bpf_map_lookup_percpu_elem_proto;
3160
3161	extern const struct bpf_func_proto bpf_get_prandom_u32_proto;
3162	extern const struct bpf_func_proto bpf_get_smp_processor_id_proto;
3163	extern const struct bpf_func_proto bpf_get_numa_node_id_proto;
3164	extern const struct bpf_func_proto bpf_tail_call_proto;
3165	extern const struct bpf_func_proto bpf_ktime_get_ns_proto;
3166	extern const struct bpf_func_proto bpf_ktime_get_boot_ns_proto;
3167	extern const struct bpf_func_proto bpf_ktime_get_tai_ns_proto;
3168	extern const struct bpf_func_proto bpf_get_current_pid_tgid_proto;
3169	extern const struct bpf_func_proto bpf_get_current_uid_gid_proto;
3170	extern const struct bpf_func_proto bpf_get_current_comm_proto;
3171	extern const struct bpf_func_proto bpf_get_stackid_proto;
3172	extern const struct bpf_func_proto bpf_get_stack_proto;
3173	extern const struct bpf_func_proto bpf_get_task_stack_proto;
3174	extern const struct bpf_func_proto bpf_get_stackid_proto_pe;
3175	extern const struct bpf_func_proto bpf_get_stack_proto_pe;
3176	extern const struct bpf_func_proto bpf_sock_map_update_proto;
3177	extern const struct bpf_func_proto bpf_sock_hash_update_proto;
3178	extern const struct bpf_func_proto bpf_get_current_cgroup_id_proto;
3179	extern const struct bpf_func_proto bpf_get_current_ancestor_cgroup_id_proto;
3180	extern const struct bpf_func_proto bpf_get_cgroup_classid_curr_proto;
3181	extern const struct bpf_func_proto bpf_msg_redirect_hash_proto;
3182	extern const struct bpf_func_proto bpf_msg_redirect_map_proto;
3183	extern const struct bpf_func_proto bpf_sk_redirect_hash_proto;
3184	extern const struct bpf_func_proto bpf_sk_redirect_map_proto;
3185	extern const struct bpf_func_proto bpf_spin_lock_proto;
3186	extern const struct bpf_func_proto bpf_spin_unlock_proto;
3187	extern const struct bpf_func_proto bpf_get_local_storage_proto;
3188	extern const struct bpf_func_proto bpf_strtol_proto;
3189	extern const struct bpf_func_proto bpf_strtoul_proto;
3190	extern const struct bpf_func_proto bpf_tcp_sock_proto;
3191	extern const struct bpf_func_proto bpf_jiffies64_proto;
3192	extern const struct bpf_func_proto bpf_get_ns_current_pid_tgid_proto;
3193	extern const struct bpf_func_proto bpf_event_output_data_proto;
3194	extern const struct bpf_func_proto bpf_ringbuf_output_proto;
3195	extern const struct bpf_func_proto bpf_ringbuf_reserve_proto;
3196	extern const struct bpf_func_proto bpf_ringbuf_submit_proto;
3197	extern const struct bpf_func_proto bpf_ringbuf_discard_proto;
3198	extern const struct bpf_func_proto bpf_ringbuf_query_proto;
3199	extern const struct bpf_func_proto bpf_ringbuf_reserve_dynptr_proto;
3200	extern const struct bpf_func_proto bpf_ringbuf_submit_dynptr_proto;
3201	extern const struct bpf_func_proto bpf_ringbuf_discard_dynptr_proto;
3202	extern const struct bpf_func_proto bpf_skc_to_tcp6_sock_proto;
3203	extern const struct bpf_func_proto bpf_skc_to_tcp_sock_proto;
3204	extern const struct bpf_func_proto bpf_skc_to_tcp_timewait_sock_proto;
3205	extern const struct bpf_func_proto bpf_skc_to_tcp_request_sock_proto;
3206	extern const struct bpf_func_proto bpf_skc_to_udp6_sock_proto;
3207	extern const struct bpf_func_proto bpf_skc_to_unix_sock_proto;
3208	extern const struct bpf_func_proto bpf_skc_to_mptcp_sock_proto;
3209	extern const struct bpf_func_proto bpf_copy_from_user_proto;
3210	extern const struct bpf_func_proto bpf_snprintf_btf_proto;
3211	extern const struct bpf_func_proto bpf_snprintf_proto;
3212	extern const struct bpf_func_proto bpf_per_cpu_ptr_proto;
3213	extern const struct bpf_func_proto bpf_this_cpu_ptr_proto;
3214	extern const struct bpf_func_proto bpf_ktime_get_coarse_ns_proto;
3215	extern const struct bpf_func_proto bpf_sock_from_file_proto;
3216	extern const struct bpf_func_proto bpf_get_socket_ptr_cookie_proto;
3217	extern const struct bpf_func_proto bpf_task_storage_get_recur_proto;
3218	extern const struct bpf_func_proto bpf_task_storage_get_proto;
3219	extern const struct bpf_func_proto bpf_task_storage_delete_recur_proto;
3220	extern const struct bpf_func_proto bpf_task_storage_delete_proto;
3221	extern const struct bpf_func_proto bpf_for_each_map_elem_proto;
3222	extern const struct bpf_func_proto bpf_btf_find_by_name_kind_proto;
3223	extern const struct bpf_func_proto bpf_sk_setsockopt_proto;
3224	extern const struct bpf_func_proto bpf_sk_getsockopt_proto;
3225	extern const struct bpf_func_proto bpf_unlocked_sk_setsockopt_proto;
3226	extern const struct bpf_func_proto bpf_unlocked_sk_getsockopt_proto;
3227	extern const struct bpf_func_proto bpf_find_vma_proto;
3228	extern const struct bpf_func_proto bpf_loop_proto;
3229	extern const struct bpf_func_proto bpf_copy_from_user_task_proto;
3230	extern const struct bpf_func_proto bpf_set_retval_proto;
3231	extern const struct bpf_func_proto bpf_get_retval_proto;
3232	extern const struct bpf_func_proto bpf_user_ringbuf_drain_proto;
3233	extern const struct bpf_func_proto bpf_cgrp_storage_get_proto;
3234	extern const struct bpf_func_proto bpf_cgrp_storage_delete_proto;
3235
3236	const struct bpf_func_proto *tracing_prog_func_proto(
3237	enum bpf_func_id func_id, const struct bpf_prog *prog);
3238
3239	/* Shared helpers among cBPF and eBPF. */
3240	void bpf_user_rnd_init_once(void);
3241	u64 bpf_user_rnd_u32(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
3242	u64 bpf_get_raw_cpu_id(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
3243
3244	#if defined(CONFIG_NET)
3245	bool bpf_sock_common_is_valid_access(int off, int size,
3246	enum bpf_access_type type,
3247	struct bpf_insn_access_aux *info);
3248	bool bpf_sock_is_valid_access(int off, int size, enum bpf_access_type type,
3249	struct bpf_insn_access_aux *info);
3250	u32 bpf_sock_convert_ctx_access(enum bpf_access_type type,
3251	const struct bpf_insn *si,
3252	struct bpf_insn *insn_buf,
3253	struct bpf_prog *prog,
3254	u32 *target_size);
3255	int bpf_dynptr_from_skb_rdonly(struct sk_buff *skb, u64 flags,
3256	struct bpf_dynptr_kern *ptr);
3257	#else
3258	static inline bool bpf_sock_common_is_valid_access(int off, int size,
3259	enum bpf_access_type type,
3260	struct bpf_insn_access_aux *info)
3261	{
3262	return false;
3263	}
3264	static inline bool bpf_sock_is_valid_access(int off, int size,
3265	enum bpf_access_type type,
3266	struct bpf_insn_access_aux *info)
3267	{
3268	return false;
3269	}
3270	static inline u32 bpf_sock_convert_ctx_access(enum bpf_access_type type,
3271	const struct bpf_insn *si,
3272	struct bpf_insn *insn_buf,
3273	struct bpf_prog *prog,
3274	u32 *target_size)
3275	{
3276	return 0;
3277	}
3278	static inline int bpf_dynptr_from_skb_rdonly(struct sk_buff *skb, u64 flags,
3279	struct bpf_dynptr_kern *ptr)
3280	{
3281	return -EOPNOTSUPP;
3282	}
3283	#endif
3284
3285	#ifdef CONFIG_INET
3286	struct sk_reuseport_kern {
3287	struct sk_buff *skb;
3288	struct sock *sk;
3289	struct sock *selected_sk;
3290	struct sock *migrating_sk;
3291	void *data_end;
3292	u32 hash;
3293	u32 reuseport_id;
3294	bool bind_inany;
3295	};
3296	bool bpf_tcp_sock_is_valid_access(int off, int size, enum bpf_access_type type,
3297	struct bpf_insn_access_aux *info);
3298
3299	u32 bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type,
3300	const struct bpf_insn *si,
3301	struct bpf_insn *insn_buf,
3302	struct bpf_prog *prog,
3303	u32 *target_size);
3304
3305	bool bpf_xdp_sock_is_valid_access(int off, int size, enum bpf_access_type type,
3306	struct bpf_insn_access_aux *info);
3307
3308	u32 bpf_xdp_sock_convert_ctx_access(enum bpf_access_type type,
3309	const struct bpf_insn *si,
3310	struct bpf_insn *insn_buf,
3311	struct bpf_prog *prog,
3312	u32 *target_size);
3313	#else
3314	static inline bool bpf_tcp_sock_is_valid_access(int off, int size,
3315	enum bpf_access_type type,
3316	struct bpf_insn_access_aux *info)
3317	{
3318	return false;
3319	}
3320
3321	static inline u32 bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type,
3322	const struct bpf_insn *si,
3323	struct bpf_insn *insn_buf,
3324	struct bpf_prog *prog,
3325	u32 *target_size)
3326	{
3327	return 0;
3328	}
3329	static inline bool bpf_xdp_sock_is_valid_access(int off, int size,
3330	enum bpf_access_type type,
3331	struct bpf_insn_access_aux *info)
3332	{
3333	return false;
3334	}
3335
3336	static inline u32 bpf_xdp_sock_convert_ctx_access(enum bpf_access_type type,
3337	const struct bpf_insn *si,
3338	struct bpf_insn *insn_buf,
3339	struct bpf_prog *prog,
3340	u32 *target_size)
3341	{
3342	return 0;
3343	}
3344	#endif /* CONFIG_INET */
3345
3346	enum bpf_text_poke_type {
3347	BPF_MOD_CALL,
3348	BPF_MOD_JUMP,
3349	};
3350
3351	int bpf_arch_text_poke(void *ip, enum bpf_text_poke_type t,
3352	void *addr1, void *addr2);
3353
3354	void bpf_arch_poke_desc_update(struct bpf_jit_poke_descriptor *poke,
3355	struct bpf_prog *new, struct bpf_prog *old);
3356
3357	void *bpf_arch_text_copy(void *dst, void *src, size_t len);
3358	int bpf_arch_text_invalidate(void *dst, size_t len);
3359
3360	struct btf_id_set;
3361	bool btf_id_set_contains(const struct btf_id_set *set, u32 id);
3362
3363	#define MAX_BPRINTF_VARARGS 12
3364	#define MAX_BPRINTF_BUF 1024
3365
3366	struct bpf_bprintf_data {
3367	u32 *bin_args;
3368	char *buf;
3369	bool get_bin_args;
3370	bool get_buf;
3371	};
3372
3373	int bpf_bprintf_prepare(char *fmt, u32 fmt_size, const u64 *raw_args,
3374	u32 num_args, struct bpf_bprintf_data *data);
3375	void bpf_bprintf_cleanup(struct bpf_bprintf_data *data);
3376
3377	#ifdef CONFIG_BPF_LSM
3378	void bpf_cgroup_atype_get(u32 attach_btf_id, int cgroup_atype);
3379	void bpf_cgroup_atype_put(int cgroup_atype);
3380	#else
3381	static inline void bpf_cgroup_atype_get(u32 attach_btf_id, int cgroup_atype) {}
3382	static inline void bpf_cgroup_atype_put(int cgroup_atype) {}
3383	#endif /* CONFIG_BPF_LSM */
3384
3385	struct key;
3386
3387	#ifdef CONFIG_KEYS
3388	struct bpf_key {
3389	struct key *key;
3390	bool has_ref;
3391	};
3392	#endif /* CONFIG_KEYS */
3393
3394	static inline bool type_is_alloc(u32 type)
3395	{
3396	return type & MEM_ALLOC;
3397	}
3398
3399	static inline gfp_t bpf_memcg_flags(gfp_t flags)
3400	{
3401	if (memcg_bpf_enabled())
3402	return flags | __GFP_ACCOUNT;
3403	return flags;
3404	}
3405
3406	static inline bool bpf_is_subprog(const struct bpf_prog *prog)
3407	{
3408	return prog->aux->func_idx != 0;
3409	}
3410
3411	#endif /* _LINUX_BPF_H */
3412