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 <crypto/sha2.h>
11	#include <linux/workqueue.h>
12	#include <linux/file.h>
13	#include <linux/percpu.h>
14	#include <linux/err.h>
15	#include <linux/rbtree_latch.h>
16	#include <linux/numa.h>
17	#include <linux/mm_types.h>
18	#include <linux/wait.h>
19	#include <linux/refcount.h>
20	#include <linux/mutex.h>
21	#include <linux/module.h>
22	#include <linux/kallsyms.h>
23	#include <linux/capability.h>
24	#include <linux/sched/mm.h>
25	#include <linux/slab.h>
26	#include <linux/percpu-refcount.h>
27	#include <linux/stddef.h>
28	#include <linux/bpfptr.h>
29	#include <linux/btf.h>
30	#include <linux/rcupdate_trace.h>
31	#include <linux/static_call.h>
32	#include <linux/memcontrol.h>
33	#include <linux/cfi.h>
34	#include <asm/rqspinlock.h>
35
36	struct bpf_verifier_env;
37	struct bpf_verifier_log;
38	struct perf_event;
39	struct bpf_prog;
40	struct bpf_prog_aux;
41	struct bpf_map;
42	struct bpf_arena;
43	struct sock;
44	struct seq_file;
45	struct btf;
46	struct btf_type;
47	struct exception_table_entry;
48	struct seq_operations;
49	struct bpf_iter_aux_info;
50	struct bpf_local_storage;
51	struct bpf_local_storage_map;
52	struct kobject;
53	struct mem_cgroup;
54	struct module;
55	struct bpf_func_state;
56	struct ftrace_ops;
57	struct cgroup;
58	struct bpf_token;
59	struct user_namespace;
60	struct super_block;
61	struct inode;
62
63	extern struct idr btf_idr;
64	extern spinlock_t btf_idr_lock;
65	extern struct kobject *btf_kobj;
66	extern struct bpf_mem_alloc bpf_global_ma, bpf_global_percpu_ma;
67	extern bool bpf_global_ma_set;
68
69	typedef u64 (*bpf_callback_t)(u64, u64, u64, u64, u64);
70	typedef int (*bpf_iter_init_seq_priv_t)(void *private_data,
71	struct bpf_iter_aux_info *aux);
72	typedef void (*bpf_iter_fini_seq_priv_t)(void *private_data);
73	typedef unsigned int (*bpf_func_t)(const void *,
74	const struct bpf_insn *);
75	struct bpf_iter_seq_info {
76	const struct seq_operations *seq_ops;
77	bpf_iter_init_seq_priv_t init_seq_private;
78	bpf_iter_fini_seq_priv_t fini_seq_private;
79	u32 seq_priv_size;
80	};
81
82	/* map is generic key/value storage optionally accessible by eBPF programs */
83	struct bpf_map_ops {
84	/* funcs callable from userspace (via syscall) */
85	int (*map_alloc_check)(union bpf_attr *attr);
86	struct bpf_map *(*map_alloc)(union bpf_attr *attr);
87	void (*map_release)(struct bpf_map *map, struct file *map_file);
88	void (*map_free)(struct bpf_map *map);
89	int (*map_get_next_key)(struct bpf_map *map, void *key, void *next_key);
90	void (*map_release_uref)(struct bpf_map *map);
91	void *(*map_lookup_elem_sys_only)(struct bpf_map *map, void *key);
92	int (*map_lookup_batch)(struct bpf_map *map, const union bpf_attr *attr,
93	union bpf_attr __user *uattr);
94	int (*map_lookup_and_delete_elem)(struct bpf_map *map, void *key,
95	void *value, u64 flags);
96	int (*map_lookup_and_delete_batch)(struct bpf_map *map,
97	const union bpf_attr *attr,
98	union bpf_attr __user *uattr);
99	int (*map_update_batch)(struct bpf_map *map, struct file *map_file,
100	const union bpf_attr *attr,
101	union bpf_attr __user *uattr);
102	int (*map_delete_batch)(struct bpf_map *map, const union bpf_attr *attr,
103	union bpf_attr __user *uattr);
104
105	/* funcs callable from userspace and from eBPF programs */
106	void *(*map_lookup_elem)(struct bpf_map *map, void *key);
107	long (*map_update_elem)(struct bpf_map *map, void *key, void *value, u64 flags);
108	long (*map_delete_elem)(struct bpf_map *map, void *key);
109	long (*map_push_elem)(struct bpf_map *map, void *value, u64 flags);
110	long (*map_pop_elem)(struct bpf_map *map, void *value);
111	long (*map_peek_elem)(struct bpf_map *map, void *value);
112	void *(*map_lookup_percpu_elem)(struct bpf_map *map, void *key, u32 cpu);
113	int (*map_get_hash)(struct bpf_map *map, u32 hash_buf_size, void *hash_buf);
114
115	/* funcs called by prog_array and perf_event_array map */
116	void *(*map_fd_get_ptr)(struct bpf_map *map, struct file *map_file,
117	int fd);
118	/* If need_defer is true, the implementation should guarantee that
119	* the to-be-put element is still alive before the bpf program, which
120	* may manipulate it, exists.
121	*/
122	void (*map_fd_put_ptr)(struct bpf_map *map, void *ptr, bool need_defer);
123	int (*map_gen_lookup)(struct bpf_map *map, struct bpf_insn *insn_buf);
124	u32 (*map_fd_sys_lookup_elem)(void *ptr);
125	void (*map_seq_show_elem)(struct bpf_map *map, void *key,
126	struct seq_file *m);
127	int (*map_check_btf)(const struct bpf_map *map,
128	const struct btf *btf,
129	const struct btf_type *key_type,
130	const struct btf_type *value_type);
131
132	/* Prog poke tracking helpers. */
133	int (*map_poke_track)(struct bpf_map *map, struct bpf_prog_aux *aux);
134	void (*map_poke_untrack)(struct bpf_map *map, struct bpf_prog_aux *aux);
135	void (*map_poke_run)(struct bpf_map *map, u32 key, struct bpf_prog *old,
136	struct bpf_prog *new);
137
138	/* Direct value access helpers. */
139	int (*map_direct_value_addr)(const struct bpf_map *map,
140	u64 *imm, u32 off);
141	int (*map_direct_value_meta)(const struct bpf_map *map,
142	u64 imm, u32 *off);
143	int (*map_mmap)(struct bpf_map *map, struct vm_area_struct *vma);
144	__poll_t (*map_poll)(struct bpf_map *map, struct file *filp,
145	struct poll_table_struct *pts);
146	unsigned long (*map_get_unmapped_area)(struct file *filep, unsigned long addr,
147	unsigned long len, unsigned long pgoff,
148	unsigned long flags);
149
150	/* Functions called by bpf_local_storage maps */
151	int (*map_local_storage_charge)(struct bpf_local_storage_map *smap,
152	void *owner, u32 size);
153	void (*map_local_storage_uncharge)(struct bpf_local_storage_map *smap,
154	void *owner, u32 size);
155	struct bpf_local_storage __rcu ** (*map_owner_storage_ptr)(void *owner);
156
157	/* Misc helpers.*/
158	long (*map_redirect)(struct bpf_map *map, u64 key, u64 flags);
159
160	/* map_meta_equal must be implemented for maps that can be
161	* used as an inner map. It is a runtime check to ensure
162	* an inner map can be inserted to an outer map.
163	*
164	* Some properties of the inner map has been used during the
165	* verification time. When inserting an inner map at the runtime,
166	* map_meta_equal has to ensure the inserting map has the same
167	* properties that the verifier has used earlier.
168	*/
169	bool (*map_meta_equal)(const struct bpf_map *meta0,
170	const struct bpf_map *meta1);
171
172
173	int (*map_set_for_each_callback_args)(struct bpf_verifier_env *env,
174	struct bpf_func_state *caller,
175	struct bpf_func_state *callee);
176	long (*map_for_each_callback)(struct bpf_map *map,
177	bpf_callback_t callback_fn,
178	void *callback_ctx, u64 flags);
179
180	u64 (*map_mem_usage)(const struct bpf_map *map);
181
182	/* BTF id of struct allocated by map_alloc */
183	int *map_btf_id;
184
185	/* bpf_iter info used to open a seq_file */
186	const struct bpf_iter_seq_info *iter_seq_info;
187	};
188
189	enum {
190	/* Support at most 11 fields in a BTF type */
191	BTF_FIELDS_MAX = 11,
192	};
193
194	enum btf_field_type {
195	BPF_SPIN_LOCK = (1 << 0),
196	BPF_TIMER = (1 << 1),
197	BPF_KPTR_UNREF = (1 << 2),
198	BPF_KPTR_REF = (1 << 3),
199	BPF_KPTR_PERCPU = (1 << 4),
200	BPF_KPTR = BPF_KPTR_UNREF | BPF_KPTR_REF | BPF_KPTR_PERCPU,
201	BPF_LIST_HEAD = (1 << 5),
202	BPF_LIST_NODE = (1 << 6),
203	BPF_RB_ROOT = (1 << 7),
204	BPF_RB_NODE = (1 << 8),
205	BPF_GRAPH_NODE = BPF_RB_NODE | BPF_LIST_NODE,
206	BPF_GRAPH_ROOT = BPF_RB_ROOT | BPF_LIST_HEAD,
207	BPF_REFCOUNT = (1 << 9),
208	BPF_WORKQUEUE = (1 << 10),
209	BPF_UPTR = (1 << 11),
210	BPF_RES_SPIN_LOCK = (1 << 12),
211	BPF_TASK_WORK = (1 << 13),
212	};
213
214	enum bpf_cgroup_storage_type {
215	BPF_CGROUP_STORAGE_SHARED,
216	BPF_CGROUP_STORAGE_PERCPU,
217	__BPF_CGROUP_STORAGE_MAX
218	#define MAX_BPF_CGROUP_STORAGE_TYPE __BPF_CGROUP_STORAGE_MAX
219	};
220
221	#ifdef CONFIG_CGROUP_BPF
222	# define for_each_cgroup_storage_type(stype) \
223	for (stype = 0; stype < MAX_BPF_CGROUP_STORAGE_TYPE; stype++)
224	#else
225	# define for_each_cgroup_storage_type(stype) for (; false; )
226	#endif /* CONFIG_CGROUP_BPF */
227
228	typedef void (*btf_dtor_kfunc_t)(void *);
229
230	struct btf_field_kptr {
231	struct btf *btf;
232	struct module *module;
233	/* dtor used if btf_is_kernel(btf), otherwise the type is
234	* program-allocated, dtor is NULL, and __bpf_obj_drop_impl is used
235	*/
236	btf_dtor_kfunc_t dtor;
237	u32 btf_id;
238	};
239
240	struct btf_field_graph_root {
241	struct btf *btf;
242	u32 value_btf_id;
243	u32 node_offset;
244	struct btf_record *value_rec;
245	};
246
247	struct btf_field {
248	u32 offset;
249	u32 size;
250	enum btf_field_type type;
251	union {
252	struct btf_field_kptr kptr;
253	struct btf_field_graph_root graph_root;
254	};
255	};
256
257	struct btf_record {
258	u32 cnt;
259	u32 field_mask;
260	int spin_lock_off;
261	int res_spin_lock_off;
262	int timer_off;
263	int wq_off;
264	int refcount_off;
265	int task_work_off;
266	struct btf_field fields[];
267	};
268
269	/* Non-opaque version of bpf_rb_node in uapi/linux/bpf.h */
270	struct bpf_rb_node_kern {
271	struct rb_node rb_node;
272	void *owner;
273	} __attribute__((aligned(8)));
274
275	/* Non-opaque version of bpf_list_node in uapi/linux/bpf.h */
276	struct bpf_list_node_kern {
277	struct list_head list_head;
278	void *owner;
279	} __attribute__((aligned(8)));
280
281	/* 'Ownership' of program-containing map is claimed by the first program
282	* that is going to use this map or by the first program which FD is
283	* stored in the map to make sure that all callers and callees have the
284	* same prog type, JITed flag and xdp_has_frags flag.
285	*/
286	struct bpf_map_owner {
287	enum bpf_prog_type type;
288	bool jited;
289	bool xdp_has_frags;
290	u64 storage_cookie[MAX_BPF_CGROUP_STORAGE_TYPE];
291	const struct btf_type *attach_func_proto;
292	enum bpf_attach_type expected_attach_type;
293	};
294
295	struct bpf_map {
296	u8 sha[SHA256_DIGEST_SIZE];
297	const struct bpf_map_ops *ops;
298	struct bpf_map *inner_map_meta;
299	#ifdef CONFIG_SECURITY
300	void *security;
301	#endif
302	enum bpf_map_type map_type;
303	u32 key_size;
304	u32 value_size;
305	u32 max_entries;
306	u64 map_extra; /* any per-map-type extra fields */
307	u32 map_flags;
308	u32 id;
309	struct btf_record *record;
310	int numa_node;
311	u32 btf_key_type_id;
312	u32 btf_value_type_id;
313	u32 btf_vmlinux_value_type_id;
314	struct btf *btf;
315	#ifdef CONFIG_MEMCG
316	struct obj_cgroup *objcg;
317	#endif
318	char name[BPF_OBJ_NAME_LEN];
319	struct mutex freeze_mutex;
320	atomic64_t refcnt;
321	atomic64_t usercnt;
322	/* rcu is used before freeing and work is only used during freeing */
323	union {
324	struct work_struct work;
325	struct rcu_head rcu;
326	};
327	atomic64_t writecnt;
328	spinlock_t owner_lock;
329	struct bpf_map_owner *owner;
330	bool bypass_spec_v1;
331	bool frozen; /* write-once; write-protected by freeze_mutex */
332	bool free_after_mult_rcu_gp;
333	bool free_after_rcu_gp;
334	atomic64_t sleepable_refcnt;
335	s64 __percpu *elem_count;
336	u64 cookie; /* write-once */
337	char *excl_prog_sha;
338	};
339
340	static inline const char *btf_field_type_name(enum btf_field_type type)
341	{
342	switch (type) {
343	case BPF_SPIN_LOCK:
344	return "bpf_spin_lock";
345	case BPF_RES_SPIN_LOCK:
346	return "bpf_res_spin_lock";
347	case BPF_TIMER:
348	return "bpf_timer";
349	case BPF_WORKQUEUE:
350	return "bpf_wq";
351	case BPF_KPTR_UNREF:
352	case BPF_KPTR_REF:
353	return "kptr";
354	case BPF_KPTR_PERCPU:
355	return "percpu_kptr";
356	case BPF_UPTR:
357	return "uptr";
358	case BPF_LIST_HEAD:
359	return "bpf_list_head";
360	case BPF_LIST_NODE:
361	return "bpf_list_node";
362	case BPF_RB_ROOT:
363	return "bpf_rb_root";
364	case BPF_RB_NODE:
365	return "bpf_rb_node";
366	case BPF_REFCOUNT:
367	return "bpf_refcount";
368	case BPF_TASK_WORK:
369	return "bpf_task_work";
370	default:
371	WARN_ON_ONCE(1);
372	return "unknown";
373	}
374	}
375
376	#if IS_ENABLED(CONFIG_DEBUG_KERNEL)
377	#define BPF_WARN_ONCE(cond, format...) WARN_ONCE(cond, format)
378	#else
379	#define BPF_WARN_ONCE(cond, format...) BUILD_BUG_ON_INVALID(cond)
380	#endif
381
382	static inline u32 btf_field_type_size(enum btf_field_type type)
383	{
384	switch (type) {
385	case BPF_SPIN_LOCK:
386	return sizeof(struct bpf_spin_lock);
387	case BPF_RES_SPIN_LOCK:
388	return sizeof(struct bpf_res_spin_lock);
389	case BPF_TIMER:
390	return sizeof(struct bpf_timer);
391	case BPF_WORKQUEUE:
392	return sizeof(struct bpf_wq);
393	case BPF_KPTR_UNREF:
394	case BPF_KPTR_REF:
395	case BPF_KPTR_PERCPU:
396	case BPF_UPTR:
397	return sizeof(u64);
398	case BPF_LIST_HEAD:
399	return sizeof(struct bpf_list_head);
400	case BPF_LIST_NODE:
401	return sizeof(struct bpf_list_node);
402	case BPF_RB_ROOT:
403	return sizeof(struct bpf_rb_root);
404	case BPF_RB_NODE:
405	return sizeof(struct bpf_rb_node);
406	case BPF_REFCOUNT:
407	return sizeof(struct bpf_refcount);
408	case BPF_TASK_WORK:
409	return sizeof(struct bpf_task_work);
410	default:
411	WARN_ON_ONCE(1);
412	return 0;
413	}
414	}
415
416	static inline u32 btf_field_type_align(enum btf_field_type type)
417	{
418	switch (type) {
419	case BPF_SPIN_LOCK:
420	return __alignof__(struct bpf_spin_lock);
421	case BPF_RES_SPIN_LOCK:
422	return __alignof__(struct bpf_res_spin_lock);
423	case BPF_TIMER:
424	return __alignof__(struct bpf_timer);
425	case BPF_WORKQUEUE:
426	return __alignof__(struct bpf_wq);
427	case BPF_KPTR_UNREF:
428	case BPF_KPTR_REF:
429	case BPF_KPTR_PERCPU:
430	case BPF_UPTR:
431	return __alignof__(u64);
432	case BPF_LIST_HEAD:
433	return __alignof__(struct bpf_list_head);
434	case BPF_LIST_NODE:
435	return __alignof__(struct bpf_list_node);
436	case BPF_RB_ROOT:
437	return __alignof__(struct bpf_rb_root);
438	case BPF_RB_NODE:
439	return __alignof__(struct bpf_rb_node);
440	case BPF_REFCOUNT:
441	return __alignof__(struct bpf_refcount);
442	case BPF_TASK_WORK:
443	return __alignof__(struct bpf_task_work);
444	default:
445	WARN_ON_ONCE(1);
446	return 0;
447	}
448	}
449
450	static inline void bpf_obj_init_field(const struct btf_field *field, void *addr)
451	{
452	memset(addr, 0, field->size);
453
454	switch (field->type) {
455	case BPF_REFCOUNT:
456	refcount_set(r: (refcount_t *)addr, n: 1);
457	break;
458	case BPF_RB_NODE:
459	RB_CLEAR_NODE((struct rb_node *)addr);
460	break;
461	case BPF_LIST_HEAD:
462	case BPF_LIST_NODE:
463	INIT_LIST_HEAD(list: (struct list_head *)addr);
464	break;
465	case BPF_RB_ROOT:
466	/* RB_ROOT_CACHED 0-inits, no need to do anything after memset */
467	case BPF_SPIN_LOCK:
468	case BPF_RES_SPIN_LOCK:
469	case BPF_TIMER:
470	case BPF_WORKQUEUE:
471	case BPF_KPTR_UNREF:
472	case BPF_KPTR_REF:
473	case BPF_KPTR_PERCPU:
474	case BPF_UPTR:
475	case BPF_TASK_WORK:
476	break;
477	default:
478	WARN_ON_ONCE(1);
479	return;
480	}
481	}
482
483	static inline bool btf_record_has_field(const struct btf_record *rec, enum btf_field_type type)
484	{
485	if (IS_ERR_OR_NULL(ptr: rec))
486	return false;
487	return rec->field_mask & type;
488	}
489
490	static inline void bpf_obj_init(const struct btf_record *rec, void *obj)
491	{
492	int i;
493
494	if (IS_ERR_OR_NULL(ptr: rec))
495	return;
496	for (i = 0; i < rec->cnt; i++)
497	bpf_obj_init_field(field: &rec->fields[i], addr: obj + rec->fields[i].offset);
498	}
499
500	/* 'dst' must be a temporary buffer and should not point to memory that is being
501	* used in parallel by a bpf program or bpf syscall, otherwise the access from
502	* the bpf program or bpf syscall may be corrupted by the reinitialization,
503	* leading to weird problems. Even 'dst' is newly-allocated from bpf memory
504	* allocator, it is still possible for 'dst' to be used in parallel by a bpf
505	* program or bpf syscall.
506	*/
507	static inline void check_and_init_map_value(struct bpf_map *map, void *dst)
508	{
509	bpf_obj_init(rec: map->record, obj: dst);
510	}
511
512	/* memcpy that is used with 8-byte aligned pointers, power-of-8 size and
513	* forced to use 'long' read/writes to try to atomically copy long counters.
514	* Best-effort only. No barriers here, since it _will_ race with concurrent
515	* updates from BPF programs. Called from bpf syscall and mostly used with
516	* size 8 or 16 bytes, so ask compiler to inline it.
517	*/
518	static inline void bpf_long_memcpy(void *dst, const void *src, u32 size)
519	{
520	const long *lsrc = src;
521	long *ldst = dst;
522
523	size /= sizeof(long);
524	while (size--)
525	data_race(*ldst++ = *lsrc++);
526	}
527
528	/* copy everything but bpf_spin_lock, bpf_timer, and kptrs. There could be one of each. */
529	static inline void bpf_obj_memcpy(struct btf_record *rec,
530	void *dst, void *src, u32 size,
531	bool long_memcpy)
532	{
533	u32 curr_off = 0;
534	int i;
535
536	if (IS_ERR_OR_NULL(ptr: rec)) {
537	if (long_memcpy)
538	bpf_long_memcpy(dst, src, round_up(size, 8));
539	else
540	memcpy(dst, src, size);
541	return;
542	}
543
544	for (i = 0; i < rec->cnt; i++) {
545	u32 next_off = rec->fields[i].offset;
546	u32 sz = next_off - curr_off;
547
548	memcpy(dst + curr_off, src + curr_off, sz);
549	curr_off += rec->fields[i].size + sz;
550	}
551	memcpy(dst + curr_off, src + curr_off, size - curr_off);
552	}
553
554	static inline void copy_map_value(struct bpf_map *map, void *dst, void *src)
555	{
556	bpf_obj_memcpy(rec: map->record, dst, src, size: map->value_size, long_memcpy: false);
557	}
558
559	static inline void copy_map_value_long(struct bpf_map *map, void *dst, void *src)
560	{
561	bpf_obj_memcpy(rec: map->record, dst, src, size: map->value_size, long_memcpy: true);
562	}
563
564	static inline void bpf_obj_swap_uptrs(const struct btf_record *rec, void *dst, void *src)
565	{
566	unsigned long *src_uptr, *dst_uptr;
567	const struct btf_field *field;
568	int i;
569
570	if (!btf_record_has_field(rec, type: BPF_UPTR))
571	return;
572
573	for (i = 0, field = rec->fields; i < rec->cnt; i++, field++) {
574	if (field->type != BPF_UPTR)
575	continue;
576
577	src_uptr = src + field->offset;
578	dst_uptr = dst + field->offset;
579	swap(*src_uptr, *dst_uptr);
580	}
581	}
582
583	static inline void bpf_obj_memzero(struct btf_record *rec, void *dst, u32 size)
584	{
585	u32 curr_off = 0;
586	int i;
587
588	if (IS_ERR_OR_NULL(ptr: rec)) {
589	memset(dst, 0, size);
590	return;
591	}
592
593	for (i = 0; i < rec->cnt; i++) {
594	u32 next_off = rec->fields[i].offset;
595	u32 sz = next_off - curr_off;
596
597	memset(dst + curr_off, 0, sz);
598	curr_off += rec->fields[i].size + sz;
599	}
600	memset(dst + curr_off, 0, size - curr_off);
601	}
602
603	static inline void zero_map_value(struct bpf_map *map, void *dst)
604	{
605	bpf_obj_memzero(rec: map->record, dst, size: map->value_size);
606	}
607
608	void copy_map_value_locked(struct bpf_map *map, void *dst, void *src,
609	bool lock_src);
610	void bpf_timer_cancel_and_free(void *timer);
611	void bpf_wq_cancel_and_free(void *timer);
612	void bpf_task_work_cancel_and_free(void *timer);
613	void bpf_list_head_free(const struct btf_field *field, void *list_head,
614	struct bpf_spin_lock *spin_lock);
615	void bpf_rb_root_free(const struct btf_field *field, void *rb_root,
616	struct bpf_spin_lock *spin_lock);
617	u64 bpf_arena_get_kern_vm_start(struct bpf_arena *arena);
618	u64 bpf_arena_get_user_vm_start(struct bpf_arena *arena);
619	int bpf_obj_name_cpy(char *dst, const char *src, unsigned int size);
620
621	struct bpf_offload_dev;
622	struct bpf_offloaded_map;
623
624	struct bpf_map_dev_ops {
625	int (*map_get_next_key)(struct bpf_offloaded_map *map,
626	void *key, void *next_key);
627	int (*map_lookup_elem)(struct bpf_offloaded_map *map,
628	void *key, void *value);
629	int (*map_update_elem)(struct bpf_offloaded_map *map,
630	void *key, void *value, u64 flags);
631	int (*map_delete_elem)(struct bpf_offloaded_map *map, void *key);
632	};
633
634	struct bpf_offloaded_map {
635	struct bpf_map map;
636	struct net_device *netdev;
637	const struct bpf_map_dev_ops *dev_ops;
638	void *dev_priv;
639	struct list_head offloads;
640	};
641
642	static inline struct bpf_offloaded_map *map_to_offmap(struct bpf_map *map)
643	{
644	return container_of(map, struct bpf_offloaded_map, map);
645	}
646
647	static inline bool bpf_map_offload_neutral(const struct bpf_map *map)
648	{
649	return map->map_type == BPF_MAP_TYPE_PERF_EVENT_ARRAY;
650	}
651
652	static inline bool bpf_map_support_seq_show(const struct bpf_map *map)
653	{
654	return (map->btf_value_type_id || map->btf_vmlinux_value_type_id) &&
655	map->ops->map_seq_show_elem;
656	}
657
658	int map_check_no_btf(const struct bpf_map *map,
659	const struct btf *btf,
660	const struct btf_type *key_type,
661	const struct btf_type *value_type);
662
663	bool bpf_map_meta_equal(const struct bpf_map *meta0,
664	const struct bpf_map *meta1);
665
666	static inline bool bpf_map_has_internal_structs(struct bpf_map *map)
667	{
668	return btf_record_has_field(rec: map->record, type: BPF_TIMER | BPF_WORKQUEUE | BPF_TASK_WORK);
669	}
670
671	void bpf_map_free_internal_structs(struct bpf_map *map, void *obj);
672
673	int bpf_dynptr_from_file_sleepable(struct file *file, u32 flags,
674	struct bpf_dynptr *ptr__uninit);
675
676	extern const struct bpf_map_ops bpf_map_offload_ops;
677
678	/* bpf_type_flag contains a set of flags that are applicable to the values of
679	* arg_type, ret_type and reg_type. For example, a pointer value may be null,
680	* or a memory is read-only. We classify types into two categories: base types
681	* and extended types. Extended types are base types combined with a type flag.
682	*
683	* Currently there are no more than 32 base types in arg_type, ret_type and
684	* reg_types.
685	*/
686	#define BPF_BASE_TYPE_BITS 8
687
688	enum bpf_type_flag {
689	/* PTR may be NULL. */
690	PTR_MAYBE_NULL = BIT(0 + BPF_BASE_TYPE_BITS),
691
692	/* MEM is read-only. When applied on bpf_arg, it indicates the arg is
693	* compatible with both mutable and immutable memory.
694	*/
695	MEM_RDONLY = BIT(1 + BPF_BASE_TYPE_BITS),
696
697	/* MEM points to BPF ring buffer reservation. */
698	MEM_RINGBUF = BIT(2 + BPF_BASE_TYPE_BITS),
699
700	/* MEM is in user address space. */
701	MEM_USER = BIT(3 + BPF_BASE_TYPE_BITS),
702
703	/* MEM is a percpu memory. MEM_PERCPU tags PTR_TO_BTF_ID. When tagged
704	* with MEM_PERCPU, PTR_TO_BTF_ID _cannot_ be directly accessed. In
705	* order to drop this tag, it must be passed into bpf_per_cpu_ptr()
706	* or bpf_this_cpu_ptr(), which will return the pointer corresponding
707	* to the specified cpu.
708	*/
709	MEM_PERCPU = BIT(4 + BPF_BASE_TYPE_BITS),
710
711	/* Indicates that the argument will be released. */
712	OBJ_RELEASE = BIT(5 + BPF_BASE_TYPE_BITS),
713
714	/* PTR is not trusted. This is only used with PTR_TO_BTF_ID, to mark
715	* unreferenced and referenced kptr loaded from map value using a load
716	* instruction, so that they can only be dereferenced but not escape the
717	* BPF program into the kernel (i.e. cannot be passed as arguments to
718	* kfunc or bpf helpers).
719	*/
720	PTR_UNTRUSTED = BIT(6 + BPF_BASE_TYPE_BITS),
721
722	/* MEM can be uninitialized. */
723	MEM_UNINIT = BIT(7 + BPF_BASE_TYPE_BITS),
724
725	/* DYNPTR points to memory local to the bpf program. */
726	DYNPTR_TYPE_LOCAL = BIT(8 + BPF_BASE_TYPE_BITS),
727
728	/* DYNPTR points to a kernel-produced ringbuf record. */
729	DYNPTR_TYPE_RINGBUF = BIT(9 + BPF_BASE_TYPE_BITS),
730
731	/* Size is known at compile time. */
732	MEM_FIXED_SIZE = BIT(10 + BPF_BASE_TYPE_BITS),
733
734	/* MEM is of an allocated object of type in program BTF. This is used to
735	* tag PTR_TO_BTF_ID allocated using bpf_obj_new.
736	*/
737	MEM_ALLOC = BIT(11 + BPF_BASE_TYPE_BITS),
738
739	/* PTR was passed from the kernel in a trusted context, and may be
740	* passed to KF_TRUSTED_ARGS kfuncs or BPF helper functions.
741	* Confusingly, this is _not_ the opposite of PTR_UNTRUSTED above.
742	* PTR_UNTRUSTED refers to a kptr that was read directly from a map
743	* without invoking bpf_kptr_xchg(). What we really need to know is
744	* whether a pointer is safe to pass to a kfunc or BPF helper function.
745	* While PTR_UNTRUSTED pointers are unsafe to pass to kfuncs and BPF
746	* helpers, they do not cover all possible instances of unsafe
747	* pointers. For example, a pointer that was obtained from walking a
748	* struct will _not_ get the PTR_UNTRUSTED type modifier, despite the
749	* fact that it may be NULL, invalid, etc. This is due to backwards
750	* compatibility requirements, as this was the behavior that was first
751	* introduced when kptrs were added. The behavior is now considered
752	* deprecated, and PTR_UNTRUSTED will eventually be removed.
753	*
754	* PTR_TRUSTED, on the other hand, is a pointer that the kernel
755	* guarantees to be valid and safe to pass to kfuncs and BPF helpers.
756	* For example, pointers passed to tracepoint arguments are considered
757	* PTR_TRUSTED, as are pointers that are passed to struct_ops
758	* callbacks. As alluded to above, pointers that are obtained from
759	* walking PTR_TRUSTED pointers are _not_ trusted. For example, if a
760	* struct task_struct *task is PTR_TRUSTED, then accessing
761	* task->last_wakee will lose the PTR_TRUSTED modifier when it's stored
762	* in a BPF register. Similarly, pointers passed to certain programs
763	* types such as kretprobes are not guaranteed to be valid, as they may
764	* for example contain an object that was recently freed.
765	*/
766	PTR_TRUSTED = BIT(12 + BPF_BASE_TYPE_BITS),
767
768	/* MEM is tagged with rcu and memory access needs rcu_read_lock protection. */
769	MEM_RCU = BIT(13 + BPF_BASE_TYPE_BITS),
770
771	/* Used to tag PTR_TO_BTF_ID | MEM_ALLOC references which are non-owning.
772	* Currently only valid for linked-list and rbtree nodes. If the nodes
773	* have a bpf_refcount_field, they must be tagged MEM_RCU as well.
774	*/
775	NON_OWN_REF = BIT(14 + BPF_BASE_TYPE_BITS),
776
777	/* DYNPTR points to sk_buff */
778	DYNPTR_TYPE_SKB = BIT(15 + BPF_BASE_TYPE_BITS),
779
780	/* DYNPTR points to xdp_buff */
781	DYNPTR_TYPE_XDP = BIT(16 + BPF_BASE_TYPE_BITS),
782
783	/* Memory must be aligned on some architectures, used in combination with
784	* MEM_FIXED_SIZE.
785	*/
786	MEM_ALIGNED = BIT(17 + BPF_BASE_TYPE_BITS),
787
788	/* MEM is being written to, often combined with MEM_UNINIT. Non-presence
789	* of MEM_WRITE means that MEM is only being read. MEM_WRITE without the
790	* MEM_UNINIT means that memory needs to be initialized since it is also
791	* read.
792	*/
793	MEM_WRITE = BIT(18 + BPF_BASE_TYPE_BITS),
794
795	/* DYNPTR points to skb_metadata_end()-skb_metadata_len() */
796	DYNPTR_TYPE_SKB_META = BIT(19 + BPF_BASE_TYPE_BITS),
797
798	/* DYNPTR points to file */
799	DYNPTR_TYPE_FILE = BIT(20 + BPF_BASE_TYPE_BITS),
800
801	__BPF_TYPE_FLAG_MAX,
802	__BPF_TYPE_LAST_FLAG = __BPF_TYPE_FLAG_MAX - 1,
803	};
804
805	#define DYNPTR_TYPE_FLAG_MASK (DYNPTR_TYPE_LOCAL | DYNPTR_TYPE_RINGBUF | DYNPTR_TYPE_SKB \
806	| DYNPTR_TYPE_XDP | DYNPTR_TYPE_SKB_META | DYNPTR_TYPE_FILE)
807
808	/* Max number of base types. */
809	#define BPF_BASE_TYPE_LIMIT (1UL << BPF_BASE_TYPE_BITS)
810
811	/* Max number of all types. */
812	#define BPF_TYPE_LIMIT (__BPF_TYPE_LAST_FLAG | (__BPF_TYPE_LAST_FLAG - 1))
813
814	/* function argument constraints */
815	enum bpf_arg_type {
816	ARG_DONTCARE = 0, /* unused argument in helper function */
817
818	/* the following constraints used to prototype
819	* bpf_map_lookup/update/delete_elem() functions
820	*/
821	ARG_CONST_MAP_PTR, /* const argument used as pointer to bpf_map */
822	ARG_PTR_TO_MAP_KEY, /* pointer to stack used as map key */
823	ARG_PTR_TO_MAP_VALUE, /* pointer to stack used as map value */
824
825	/* Used to prototype bpf_memcmp() and other functions that access data
826	* on eBPF program stack
827	*/
828	ARG_PTR_TO_MEM, /* pointer to valid memory (stack, packet, map value) */
829	ARG_PTR_TO_ARENA,
830
831	ARG_CONST_SIZE, /* number of bytes accessed from memory */
832	ARG_CONST_SIZE_OR_ZERO, /* number of bytes accessed from memory or 0 */
833
834	ARG_PTR_TO_CTX, /* pointer to context */
835	ARG_ANYTHING, /* any (initialized) argument is ok */
836	ARG_PTR_TO_SPIN_LOCK, /* pointer to bpf_spin_lock */
837	ARG_PTR_TO_SOCK_COMMON, /* pointer to sock_common */
838	ARG_PTR_TO_SOCKET, /* pointer to bpf_sock (fullsock) */
839	ARG_PTR_TO_BTF_ID, /* pointer to in-kernel struct */
840	ARG_PTR_TO_RINGBUF_MEM, /* pointer to dynamically reserved ringbuf memory */
841	ARG_CONST_ALLOC_SIZE_OR_ZERO, /* number of allocated bytes requested */
842	ARG_PTR_TO_BTF_ID_SOCK_COMMON, /* pointer to in-kernel sock_common or bpf-mirrored bpf_sock */
843	ARG_PTR_TO_PERCPU_BTF_ID, /* pointer to in-kernel percpu type */
844	ARG_PTR_TO_FUNC, /* pointer to a bpf program function */
845	ARG_PTR_TO_STACK, /* pointer to stack */
846	ARG_PTR_TO_CONST_STR, /* pointer to a null terminated read-only string */
847	ARG_PTR_TO_TIMER, /* pointer to bpf_timer */
848	ARG_KPTR_XCHG_DEST, /* pointer to destination that kptrs are bpf_kptr_xchg'd into */
849	ARG_PTR_TO_DYNPTR, /* pointer to bpf_dynptr. See bpf_type_flag for dynptr type */
850	__BPF_ARG_TYPE_MAX,
851
852	/* Extended arg_types. */
853	ARG_PTR_TO_MAP_VALUE_OR_NULL = PTR_MAYBE_NULL | ARG_PTR_TO_MAP_VALUE,
854	ARG_PTR_TO_MEM_OR_NULL = PTR_MAYBE_NULL | ARG_PTR_TO_MEM,
855	ARG_PTR_TO_CTX_OR_NULL = PTR_MAYBE_NULL | ARG_PTR_TO_CTX,
856	ARG_PTR_TO_SOCKET_OR_NULL = PTR_MAYBE_NULL | ARG_PTR_TO_SOCKET,
857	ARG_PTR_TO_STACK_OR_NULL = PTR_MAYBE_NULL | ARG_PTR_TO_STACK,
858	ARG_PTR_TO_BTF_ID_OR_NULL = PTR_MAYBE_NULL | ARG_PTR_TO_BTF_ID,
859	/* Pointer to memory does not need to be initialized, since helper function
860	* fills all bytes or clears them in error case.
861	*/
862	ARG_PTR_TO_UNINIT_MEM = MEM_UNINIT | MEM_WRITE | ARG_PTR_TO_MEM,
863	/* Pointer to valid memory of size known at compile time. */
864	ARG_PTR_TO_FIXED_SIZE_MEM = MEM_FIXED_SIZE | ARG_PTR_TO_MEM,
865
866	/* This must be the last entry. Its purpose is to ensure the enum is
867	* wide enough to hold the higher bits reserved for bpf_type_flag.
868	*/
869	__BPF_ARG_TYPE_LIMIT = BPF_TYPE_LIMIT,
870	};
871	static_assert(__BPF_ARG_TYPE_MAX <= BPF_BASE_TYPE_LIMIT);
872
873	/* type of values returned from helper functions */
874	enum bpf_return_type {
875	RET_INTEGER, /* function returns integer */
876	RET_VOID, /* function doesn't return anything */
877	RET_PTR_TO_MAP_VALUE, /* returns a pointer to map elem value */
878	RET_PTR_TO_SOCKET, /* returns a pointer to a socket */
879	RET_PTR_TO_TCP_SOCK, /* returns a pointer to a tcp_sock */
880	RET_PTR_TO_SOCK_COMMON, /* returns a pointer to a sock_common */
881	RET_PTR_TO_MEM, /* returns a pointer to memory */
882	RET_PTR_TO_MEM_OR_BTF_ID, /* returns a pointer to a valid memory or a btf_id */
883	RET_PTR_TO_BTF_ID, /* returns a pointer to a btf_id */
884	__BPF_RET_TYPE_MAX,
885
886	/* Extended ret_types. */
887	RET_PTR_TO_MAP_VALUE_OR_NULL = PTR_MAYBE_NULL | RET_PTR_TO_MAP_VALUE,
888	RET_PTR_TO_SOCKET_OR_NULL = PTR_MAYBE_NULL | RET_PTR_TO_SOCKET,
889	RET_PTR_TO_TCP_SOCK_OR_NULL = PTR_MAYBE_NULL | RET_PTR_TO_TCP_SOCK,
890	RET_PTR_TO_SOCK_COMMON_OR_NULL = PTR_MAYBE_NULL | RET_PTR_TO_SOCK_COMMON,
891	RET_PTR_TO_RINGBUF_MEM_OR_NULL = PTR_MAYBE_NULL | MEM_RINGBUF | RET_PTR_TO_MEM,
892	RET_PTR_TO_DYNPTR_MEM_OR_NULL = PTR_MAYBE_NULL | RET_PTR_TO_MEM,
893	RET_PTR_TO_BTF_ID_OR_NULL = PTR_MAYBE_NULL | RET_PTR_TO_BTF_ID,
894	RET_PTR_TO_BTF_ID_TRUSTED = PTR_TRUSTED | RET_PTR_TO_BTF_ID,
895
896	/* This must be the last entry. Its purpose is to ensure the enum is
897	* wide enough to hold the higher bits reserved for bpf_type_flag.
898	*/
899	__BPF_RET_TYPE_LIMIT = BPF_TYPE_LIMIT,
900	};
901	static_assert(__BPF_RET_TYPE_MAX <= BPF_BASE_TYPE_LIMIT);
902
903	/* eBPF function prototype used by verifier to allow BPF_CALLs from eBPF programs
904	* to in-kernel helper functions and for adjusting imm32 field in BPF_CALL
905	* instructions after verifying
906	*/
907	struct bpf_func_proto {
908	u64 (*func)(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
909	bool gpl_only;
910	bool pkt_access;
911	bool might_sleep;
912	/* set to true if helper follows contract for llvm
913	* attribute bpf_fastcall:
914	* - void functions do not scratch r0
915	* - functions taking N arguments scratch only registers r1-rN
916	*/
917	bool allow_fastcall;
918	enum bpf_return_type ret_type;
919	union {
920	struct {
921	enum bpf_arg_type arg1_type;
922	enum bpf_arg_type arg2_type;
923	enum bpf_arg_type arg3_type;
924	enum bpf_arg_type arg4_type;
925	enum bpf_arg_type arg5_type;
926	};
927	enum bpf_arg_type arg_type[5];
928	};
929	union {
930	struct {
931	u32 *arg1_btf_id;
932	u32 *arg2_btf_id;
933	u32 *arg3_btf_id;
934	u32 *arg4_btf_id;
935	u32 *arg5_btf_id;
936	};
937	u32 *arg_btf_id[5];
938	struct {
939	size_t arg1_size;
940	size_t arg2_size;
941	size_t arg3_size;
942	size_t arg4_size;
943	size_t arg5_size;
944	};
945	size_t arg_size[5];
946	};
947	int *ret_btf_id; /* return value btf_id */
948	bool (*allowed)(const struct bpf_prog *prog);
949	};
950
951	/* bpf_context is intentionally undefined structure. Pointer to bpf_context is
952	* the first argument to eBPF programs.
953	* For socket filters: 'struct bpf_context *' == 'struct sk_buff *'
954	*/
955	struct bpf_context;
956
957	enum bpf_access_type {
958	BPF_READ = 1,
959	BPF_WRITE = 2
960	};
961
962	/* types of values stored in eBPF registers */
963	/* Pointer types represent:
964	* pointer
965	* pointer + imm
966	* pointer + (u16) var
967	* pointer + (u16) var + imm
968	* if (range > 0) then [ptr, ptr + range - off) is safe to access
969	* if (id > 0) means that some 'var' was added
970	* if (off > 0) means that 'imm' was added
971	*/
972	enum bpf_reg_type {
973	NOT_INIT = 0, /* nothing was written into register */
974	SCALAR_VALUE, /* reg doesn't contain a valid pointer */
975	PTR_TO_CTX, /* reg points to bpf_context */
976	CONST_PTR_TO_MAP, /* reg points to struct bpf_map */
977	PTR_TO_MAP_VALUE, /* reg points to map element value */
978	PTR_TO_MAP_KEY, /* reg points to a map element key */
979	PTR_TO_STACK, /* reg == frame_pointer + offset */
980	PTR_TO_PACKET_META, /* skb->data - meta_len */
981	PTR_TO_PACKET, /* reg points to skb->data */
982	PTR_TO_PACKET_END, /* skb->data + headlen */
983	PTR_TO_FLOW_KEYS, /* reg points to bpf_flow_keys */
984	PTR_TO_SOCKET, /* reg points to struct bpf_sock */
985	PTR_TO_SOCK_COMMON, /* reg points to sock_common */
986	PTR_TO_TCP_SOCK, /* reg points to struct tcp_sock */
987	PTR_TO_TP_BUFFER, /* reg points to a writable raw tp's buffer */
988	PTR_TO_XDP_SOCK, /* reg points to struct xdp_sock */
989	/* PTR_TO_BTF_ID points to a kernel struct that does not need
990	* to be null checked by the BPF program. This does not imply the
991	* pointer is _not_ null and in practice this can easily be a null
992	* pointer when reading pointer chains. The assumption is program
993	* context will handle null pointer dereference typically via fault
994	* handling. The verifier must keep this in mind and can make no
995	* assumptions about null or non-null when doing branch analysis.
996	* Further, when passed into helpers the helpers can not, without
997	* additional context, assume the value is non-null.
998	*/
999	PTR_TO_BTF_ID,
1000	PTR_TO_MEM, /* reg points to valid memory region */
1001	PTR_TO_ARENA,
1002	PTR_TO_BUF, /* reg points to a read/write buffer */
1003	PTR_TO_FUNC, /* reg points to a bpf program function */
1004	PTR_TO_INSN, /* reg points to a bpf program instruction */
1005	CONST_PTR_TO_DYNPTR, /* reg points to a const struct bpf_dynptr */
1006	__BPF_REG_TYPE_MAX,
1007
1008	/* Extended reg_types. */
1009	PTR_TO_MAP_VALUE_OR_NULL = PTR_MAYBE_NULL | PTR_TO_MAP_VALUE,
1010	PTR_TO_SOCKET_OR_NULL = PTR_MAYBE_NULL | PTR_TO_SOCKET,
1011	PTR_TO_SOCK_COMMON_OR_NULL = PTR_MAYBE_NULL | PTR_TO_SOCK_COMMON,
1012	PTR_TO_TCP_SOCK_OR_NULL = PTR_MAYBE_NULL | PTR_TO_TCP_SOCK,
1013	/* PTR_TO_BTF_ID_OR_NULL points to a kernel struct that has not
1014	* been checked for null. Used primarily to inform the verifier
1015	* an explicit null check is required for this struct.
1016	*/
1017	PTR_TO_BTF_ID_OR_NULL = PTR_MAYBE_NULL | PTR_TO_BTF_ID,
1018
1019	/* This must be the last entry. Its purpose is to ensure the enum is
1020	* wide enough to hold the higher bits reserved for bpf_type_flag.
1021	*/
1022	__BPF_REG_TYPE_LIMIT = BPF_TYPE_LIMIT,
1023	};
1024	static_assert(__BPF_REG_TYPE_MAX <= BPF_BASE_TYPE_LIMIT);
1025
1026	/* The information passed from prog-specific *_is_valid_access
1027	* back to the verifier.
1028	*/
1029	struct bpf_insn_access_aux {
1030	enum bpf_reg_type reg_type;
1031	bool is_ldsx;
1032	union {
1033	int ctx_field_size;
1034	struct {
1035	struct btf *btf;
1036	u32 btf_id;
1037	u32 ref_obj_id;
1038	};
1039	};
1040	struct bpf_verifier_log *log; /* for verbose logs */
1041	bool is_retval; /* is accessing function return value ? */
1042	};
1043
1044	static inline void
1045	bpf_ctx_record_field_size(struct bpf_insn_access_aux *aux, u32 size)
1046	{
1047	aux->ctx_field_size = size;
1048	}
1049
1050	static bool bpf_is_ldimm64(const struct bpf_insn *insn)
1051	{
1052	return insn->code == (BPF_LD | BPF_IMM | BPF_DW);
1053	}
1054
1055	static inline bool bpf_pseudo_func(const struct bpf_insn *insn)
1056	{
1057	return bpf_is_ldimm64(insn) && insn->src_reg == BPF_PSEUDO_FUNC;
1058	}
1059
1060	/* Given a BPF_ATOMIC instruction @atomic_insn, return true if it is an
1061	* atomic load or store, and false if it is a read-modify-write instruction.
1062	*/
1063	static inline bool
1064	bpf_atomic_is_load_store(const struct bpf_insn *atomic_insn)
1065	{
1066	switch (atomic_insn->imm) {
1067	case BPF_LOAD_ACQ:
1068	case BPF_STORE_REL:
1069	return true;
1070	default:
1071	return false;
1072	}
1073	}
1074
1075	struct bpf_prog_ops {
1076	int (*test_run)(struct bpf_prog *prog, const union bpf_attr *kattr,
1077	union bpf_attr __user *uattr);
1078	};
1079
1080	struct bpf_reg_state;
1081	struct bpf_verifier_ops {
1082	/* return eBPF function prototype for verification */
1083	const struct bpf_func_proto *
1084	(*get_func_proto)(enum bpf_func_id func_id,
1085	const struct bpf_prog *prog);
1086
1087	/* return true if 'size' wide access at offset 'off' within bpf_context
1088	* with 'type' (read or write) is allowed
1089	*/
1090	bool (*is_valid_access)(int off, int size, enum bpf_access_type type,
1091	const struct bpf_prog *prog,
1092	struct bpf_insn_access_aux *info);
1093	int (*gen_prologue)(struct bpf_insn *insn, bool direct_write,
1094	const struct bpf_prog *prog);
1095	int (*gen_epilogue)(struct bpf_insn *insn, const struct bpf_prog *prog,
1096	s16 ctx_stack_off);
1097	int (*gen_ld_abs)(const struct bpf_insn *orig,
1098	struct bpf_insn *insn_buf);
1099	u32 (*convert_ctx_access)(enum bpf_access_type type,
1100	const struct bpf_insn *src,
1101	struct bpf_insn *dst,
1102	struct bpf_prog *prog, u32 *target_size);
1103	int (*btf_struct_access)(struct bpf_verifier_log *log,
1104	const struct bpf_reg_state *reg,
1105	int off, int size);
1106	};
1107
1108	struct bpf_prog_offload_ops {
1109	/* verifier basic callbacks */
1110	int (*insn_hook)(struct bpf_verifier_env *env,
1111	int insn_idx, int prev_insn_idx);
1112	int (*finalize)(struct bpf_verifier_env *env);
1113	/* verifier optimization callbacks (called after .finalize) */
1114	int (*replace_insn)(struct bpf_verifier_env *env, u32 off,
1115	struct bpf_insn *insn);
1116	int (*remove_insns)(struct bpf_verifier_env *env, u32 off, u32 cnt);
1117	/* program management callbacks */
1118	int (*prepare)(struct bpf_prog *prog);
1119	int (*translate)(struct bpf_prog *prog);
1120	void (*destroy)(struct bpf_prog *prog);
1121	};
1122
1123	struct bpf_prog_offload {
1124	struct bpf_prog *prog;
1125	struct net_device *netdev;
1126	struct bpf_offload_dev *offdev;
1127	void *dev_priv;
1128	struct list_head offloads;
1129	bool dev_state;
1130	bool opt_failed;
1131	void *jited_image;
1132	u32 jited_len;
1133	};
1134
1135	/* The longest tracepoint has 12 args.
1136	* See include/trace/bpf_probe.h
1137	*/
1138	#define MAX_BPF_FUNC_ARGS 12
1139
1140	/* The maximum number of arguments passed through registers
1141	* a single function may have.
1142	*/
1143	#define MAX_BPF_FUNC_REG_ARGS 5
1144
1145	/* The argument is a structure or a union. */
1146	#define BTF_FMODEL_STRUCT_ARG BIT(0)
1147
1148	/* The argument is signed. */
1149	#define BTF_FMODEL_SIGNED_ARG BIT(1)
1150
1151	struct btf_func_model {
1152	u8 ret_size;
1153	u8 ret_flags;
1154	u8 nr_args;
1155	u8 arg_size[MAX_BPF_FUNC_ARGS];
1156	u8 arg_flags[MAX_BPF_FUNC_ARGS];
1157	};
1158
1159	/* Restore arguments before returning from trampoline to let original function
1160	* continue executing. This flag is used for fentry progs when there are no
1161	* fexit progs.
1162	*/
1163	#define BPF_TRAMP_F_RESTORE_REGS BIT(0)
1164	/* Call original function after fentry progs, but before fexit progs.
1165	* Makes sense for fentry/fexit, normal calls and indirect calls.
1166	*/
1167	#define BPF_TRAMP_F_CALL_ORIG BIT(1)
1168	/* Skip current frame and return to parent. Makes sense for fentry/fexit
1169	* programs only. Should not be used with normal calls and indirect calls.
1170	*/
1171	#define BPF_TRAMP_F_SKIP_FRAME BIT(2)
1172	/* Store IP address of the caller on the trampoline stack,
1173	* so it's available for trampoline's programs.
1174	*/
1175	#define BPF_TRAMP_F_IP_ARG BIT(3)
1176	/* Return the return value of fentry prog. Only used by bpf_struct_ops. */
1177	#define BPF_TRAMP_F_RET_FENTRY_RET BIT(4)
1178
1179	/* Get original function from stack instead of from provided direct address.
1180	* Makes sense for trampolines with fexit or fmod_ret programs.
1181	*/
1182	#define BPF_TRAMP_F_ORIG_STACK BIT(5)
1183
1184	/* This trampoline is on a function with another ftrace_ops with IPMODIFY,
1185	* e.g., a live patch. This flag is set and cleared by ftrace call backs,
1186	*/
1187	#define BPF_TRAMP_F_SHARE_IPMODIFY BIT(6)
1188
1189	/* Indicate that current trampoline is in a tail call context. Then, it has to
1190	* cache and restore tail_call_cnt to avoid infinite tail call loop.
1191	*/
1192	#define BPF_TRAMP_F_TAIL_CALL_CTX BIT(7)
1193
1194	/*
1195	* Indicate the trampoline should be suitable to receive indirect calls;
1196	* without this indirectly calling the generated code can result in #UD/#CP,
1197	* depending on the CFI options.
1198	*
1199	* Used by bpf_struct_ops.
1200	*
1201	* Incompatible with FENTRY usage, overloads @func_addr argument.
1202	*/
1203	#define BPF_TRAMP_F_INDIRECT BIT(8)
1204
1205	/* Each call __bpf_prog_enter + call bpf_func + call __bpf_prog_exit is ~50
1206	* bytes on x86.
1207	*/
1208	enum {
1209	#if defined(__s390x__)
1210	BPF_MAX_TRAMP_LINKS = 27,
1211	#else
1212	BPF_MAX_TRAMP_LINKS = 38,
1213	#endif
1214	};
1215
1216	struct bpf_tramp_links {
1217	struct bpf_tramp_link *links[BPF_MAX_TRAMP_LINKS];
1218	int nr_links;
1219	};
1220
1221	struct bpf_tramp_run_ctx;
1222
1223	/* Different use cases for BPF trampoline:
1224	* 1. replace nop at the function entry (kprobe equivalent)
1225	* flags = BPF_TRAMP_F_RESTORE_REGS
1226	* fentry = a set of programs to run before returning from trampoline
1227	*
1228	* 2. replace nop at the function entry (kprobe + kretprobe equivalent)
1229	* flags = BPF_TRAMP_F_CALL_ORIG | BPF_TRAMP_F_SKIP_FRAME
1230	* orig_call = fentry_ip + MCOUNT_INSN_SIZE
1231	* fentry = a set of program to run before calling original function
1232	* fexit = a set of program to run after original function
1233	*
1234	* 3. replace direct call instruction anywhere in the function body
1235	* or assign a function pointer for indirect call (like tcp_congestion_ops->cong_avoid)
1236	* With flags = 0
1237	* fentry = a set of programs to run before returning from trampoline
1238	* With flags = BPF_TRAMP_F_CALL_ORIG
1239	* orig_call = original callback addr or direct function addr
1240	* fentry = a set of program to run before calling original function
1241	* fexit = a set of program to run after original function
1242	*/
1243	struct bpf_tramp_image;
1244	int arch_prepare_bpf_trampoline(struct bpf_tramp_image *im, void *image, void *image_end,
1245	const struct btf_func_model *m, u32 flags,
1246	struct bpf_tramp_links *tlinks,
1247	void *func_addr);
1248	void *arch_alloc_bpf_trampoline(unsigned int size);
1249	void arch_free_bpf_trampoline(void *image, unsigned int size);
1250	int __must_check arch_protect_bpf_trampoline(void *image, unsigned int size);
1251	int arch_bpf_trampoline_size(const struct btf_func_model *m, u32 flags,
1252	struct bpf_tramp_links *tlinks, void *func_addr);
1253
1254	u64 notrace __bpf_prog_enter_sleepable_recur(struct bpf_prog *prog,
1255	struct bpf_tramp_run_ctx *run_ctx);
1256	void notrace __bpf_prog_exit_sleepable_recur(struct bpf_prog *prog, u64 start,
1257	struct bpf_tramp_run_ctx *run_ctx);
1258	void notrace __bpf_tramp_enter(struct bpf_tramp_image *tr);
1259	void notrace __bpf_tramp_exit(struct bpf_tramp_image *tr);
1260	typedef u64 (*bpf_trampoline_enter_t)(struct bpf_prog *prog,
1261	struct bpf_tramp_run_ctx *run_ctx);
1262	typedef void (*bpf_trampoline_exit_t)(struct bpf_prog *prog, u64 start,
1263	struct bpf_tramp_run_ctx *run_ctx);
1264	bpf_trampoline_enter_t bpf_trampoline_enter(const struct bpf_prog *prog);
1265	bpf_trampoline_exit_t bpf_trampoline_exit(const struct bpf_prog *prog);
1266
1267	#ifdef CONFIG_DYNAMIC_FTRACE_WITH_JMP
1268	static inline bool bpf_trampoline_use_jmp(u64 flags)
1269	{
1270	return flags & BPF_TRAMP_F_CALL_ORIG && !(flags & BPF_TRAMP_F_SKIP_FRAME);
1271	}
1272	#else
1273	static inline bool bpf_trampoline_use_jmp(u64 flags)
1274	{
1275	return false;
1276	}
1277	#endif
1278
1279	struct bpf_ksym {
1280	unsigned long start;
1281	unsigned long end;
1282	char name[KSYM_NAME_LEN];
1283	struct list_head lnode;
1284	struct latch_tree_node tnode;
1285	bool prog;
1286	u32 fp_start;
1287	u32 fp_end;
1288	};
1289
1290	enum bpf_tramp_prog_type {
1291	BPF_TRAMP_FENTRY,
1292	BPF_TRAMP_FEXIT,
1293	BPF_TRAMP_MODIFY_RETURN,
1294	BPF_TRAMP_MAX,
1295	BPF_TRAMP_REPLACE, /* more than MAX */
1296	};
1297
1298	struct bpf_tramp_image {
1299	void *image;
1300	int size;
1301	struct bpf_ksym ksym;
1302	struct percpu_ref pcref;
1303	void *ip_after_call;
1304	void *ip_epilogue;
1305	union {
1306	struct rcu_head rcu;
1307	struct work_struct work;
1308	};
1309	};
1310
1311	struct bpf_trampoline {
1312	/* hlist for trampoline_table */
1313	struct hlist_node hlist;
1314	struct ftrace_ops *fops;
1315	/* serializes access to fields of this trampoline */
1316	struct mutex mutex;
1317	refcount_t refcnt;
1318	u32 flags;
1319	u64 key;
1320	struct {
1321	struct btf_func_model model;
1322	void *addr;
1323	bool ftrace_managed;
1324	} func;
1325	/* if !NULL this is BPF_PROG_TYPE_EXT program that extends another BPF
1326	* program by replacing one of its functions. func.addr is the address
1327	* of the function it replaced.
1328	*/
1329	struct bpf_prog *extension_prog;
1330	/* list of BPF programs using this trampoline */
1331	struct hlist_head progs_hlist[BPF_TRAMP_MAX];
1332	/* Number of attached programs. A counter per kind. */
1333	int progs_cnt[BPF_TRAMP_MAX];
1334	/* Executable image of trampoline */
1335	struct bpf_tramp_image *cur_image;
1336	};
1337
1338	struct bpf_attach_target_info {
1339	struct btf_func_model fmodel;
1340	long tgt_addr;
1341	struct module *tgt_mod;
1342	const char *tgt_name;
1343	const struct btf_type *tgt_type;
1344	};
1345
1346	#define BPF_DISPATCHER_MAX 48 /* Fits in 2048B */
1347
1348	struct bpf_dispatcher_prog {
1349	struct bpf_prog *prog;
1350	refcount_t users;
1351	};
1352
1353	struct bpf_dispatcher {
1354	/* dispatcher mutex */
1355	struct mutex mutex;
1356	void *func;
1357	struct bpf_dispatcher_prog progs[BPF_DISPATCHER_MAX];
1358	int num_progs;
1359	void *image;
1360	void *rw_image;
1361	u32 image_off;
1362	struct bpf_ksym ksym;
1363	#ifdef CONFIG_HAVE_STATIC_CALL
1364	struct static_call_key *sc_key;
1365	void *sc_tramp;
1366	#endif
1367	};
1368
1369	#ifndef __bpfcall
1370	#define __bpfcall __nocfi
1371	#endif
1372
1373	static __always_inline __bpfcall unsigned int bpf_dispatcher_nop_func(
1374	const void *ctx,
1375	const struct bpf_insn *insnsi,
1376	bpf_func_t bpf_func)
1377	{
1378	return bpf_func(ctx, insnsi);
1379	}
1380
1381	/* the implementation of the opaque uapi struct bpf_dynptr */
1382	struct bpf_dynptr_kern {
1383	void *data;
1384	/* Size represents the number of usable bytes of dynptr data.
1385	* If for example the offset is at 4 for a local dynptr whose data is
1386	* of type u64, the number of usable bytes is 4.
1387	*
1388	* The upper 8 bits are reserved. It is as follows:
1389	* Bits 0 - 23 = size
1390	* Bits 24 - 30 = dynptr type
1391	* Bit 31 = whether dynptr is read-only
1392	*/
1393	u32 size;
1394	u32 offset;
1395	} __aligned(8);
1396
1397	enum bpf_dynptr_type {
1398	BPF_DYNPTR_TYPE_INVALID,
1399	/* Points to memory that is local to the bpf program */
1400	BPF_DYNPTR_TYPE_LOCAL,
1401	/* Underlying data is a ringbuf record */
1402	BPF_DYNPTR_TYPE_RINGBUF,
1403	/* Underlying data is a sk_buff */
1404	BPF_DYNPTR_TYPE_SKB,
1405	/* Underlying data is a xdp_buff */
1406	BPF_DYNPTR_TYPE_XDP,
1407	/* Points to skb_metadata_end()-skb_metadata_len() */
1408	BPF_DYNPTR_TYPE_SKB_META,
1409	/* Underlying data is a file */
1410	BPF_DYNPTR_TYPE_FILE,
1411	};
1412
1413	int bpf_dynptr_check_size(u64 size);
1414	u64 __bpf_dynptr_size(const struct bpf_dynptr_kern *ptr);
1415	const void *__bpf_dynptr_data(const struct bpf_dynptr_kern *ptr, u64 len);
1416	void *__bpf_dynptr_data_rw(const struct bpf_dynptr_kern *ptr, u64 len);
1417	bool __bpf_dynptr_is_rdonly(const struct bpf_dynptr_kern *ptr);
1418	int __bpf_dynptr_write(const struct bpf_dynptr_kern *dst, u64 offset,
1419	void *src, u64 len, u64 flags);
1420	void *bpf_dynptr_slice_rdwr(const struct bpf_dynptr *p, u64 offset,
1421	void *buffer__opt, u64 buffer__szk);
1422
1423	static inline int bpf_dynptr_check_off_len(const struct bpf_dynptr_kern *ptr, u64 offset, u64 len)
1424	{
1425	u64 size = __bpf_dynptr_size(ptr);
1426
1427	if (len > size || offset > size - len)
1428	return -E2BIG;
1429
1430	return 0;
1431	}
1432
1433	#ifdef CONFIG_BPF_JIT
1434	int bpf_trampoline_link_prog(struct bpf_tramp_link *link,
1435	struct bpf_trampoline *tr,
1436	struct bpf_prog *tgt_prog);
1437	int bpf_trampoline_unlink_prog(struct bpf_tramp_link *link,
1438	struct bpf_trampoline *tr,
1439	struct bpf_prog *tgt_prog);
1440	struct bpf_trampoline *bpf_trampoline_get(u64 key,
1441	struct bpf_attach_target_info *tgt_info);
1442	void bpf_trampoline_put(struct bpf_trampoline *tr);
1443	int arch_prepare_bpf_dispatcher(void *image, void *buf, s64 *funcs, int num_funcs);
1444
1445	/*
1446	* When the architecture supports STATIC_CALL replace the bpf_dispatcher_fn
1447	* indirection with a direct call to the bpf program. If the architecture does
1448	* not have STATIC_CALL, avoid a double-indirection.
1449	*/
1450	#ifdef CONFIG_HAVE_STATIC_CALL
1451
1452	#define __BPF_DISPATCHER_SC_INIT(_name) \
1453	.sc_key = &STATIC_CALL_KEY(_name), \
1454	.sc_tramp = STATIC_CALL_TRAMP_ADDR(_name),
1455
1456	#define __BPF_DISPATCHER_SC(name) \
1457	DEFINE_STATIC_CALL(bpf_dispatcher_##name##_call, bpf_dispatcher_nop_func)
1458
1459	#define __BPF_DISPATCHER_CALL(name) \
1460	static_call(bpf_dispatcher_##name##_call)(ctx, insnsi, bpf_func)
1461
1462	#define __BPF_DISPATCHER_UPDATE(_d, _new) \
1463	__static_call_update((_d)->sc_key, (_d)->sc_tramp, (_new))
1464
1465	#else
1466	#define __BPF_DISPATCHER_SC_INIT(name)
1467	#define __BPF_DISPATCHER_SC(name)
1468	#define __BPF_DISPATCHER_CALL(name) bpf_func(ctx, insnsi)
1469	#define __BPF_DISPATCHER_UPDATE(_d, _new)
1470	#endif
1471
1472	#define BPF_DISPATCHER_INIT(_name) { \
1473	.mutex = __MUTEX_INITIALIZER(_name.mutex), \
1474	.func = &_name##_func, \
1475	.progs = {}, \
1476	.num_progs = 0, \
1477	.image = NULL, \
1478	.image_off = 0, \
1479	.ksym = { \
1480	.name = #_name, \
1481	.lnode = LIST_HEAD_INIT(_name.ksym.lnode), \
1482	}, \
1483	__BPF_DISPATCHER_SC_INIT(_name##_call) \
1484	}
1485
1486	#define DEFINE_BPF_DISPATCHER(name) \
1487	__BPF_DISPATCHER_SC(name); \
1488	noinline __bpfcall unsigned int bpf_dispatcher_##name##_func( \
1489	const void *ctx, \
1490	const struct bpf_insn *insnsi, \
1491	bpf_func_t bpf_func) \
1492	{ \
1493	return __BPF_DISPATCHER_CALL(name); \
1494	} \
1495	EXPORT_SYMBOL(bpf_dispatcher_##name##_func); \
1496	struct bpf_dispatcher bpf_dispatcher_##name = \
1497	BPF_DISPATCHER_INIT(bpf_dispatcher_##name);
1498
1499	#define DECLARE_BPF_DISPATCHER(name) \
1500	unsigned int bpf_dispatcher_##name##_func( \
1501	const void *ctx, \
1502	const struct bpf_insn *insnsi, \
1503	bpf_func_t bpf_func); \
1504	extern struct bpf_dispatcher bpf_dispatcher_##name;
1505
1506	#define BPF_DISPATCHER_FUNC(name) bpf_dispatcher_##name##_func
1507	#define BPF_DISPATCHER_PTR(name) (&bpf_dispatcher_##name)
1508	void bpf_dispatcher_change_prog(struct bpf_dispatcher *d, struct bpf_prog *from,
1509	struct bpf_prog *to);
1510	/* Called only from JIT-enabled code, so there's no need for stubs. */
1511	void bpf_image_ksym_init(void *data, unsigned int size, struct bpf_ksym *ksym);
1512	void bpf_image_ksym_add(struct bpf_ksym *ksym);
1513	void bpf_image_ksym_del(struct bpf_ksym *ksym);
1514	void bpf_ksym_add(struct bpf_ksym *ksym);
1515	void bpf_ksym_del(struct bpf_ksym *ksym);
1516	bool bpf_has_frame_pointer(unsigned long ip);
1517	int bpf_jit_charge_modmem(u32 size);
1518	void bpf_jit_uncharge_modmem(u32 size);
1519	bool bpf_prog_has_trampoline(const struct bpf_prog *prog);
1520	#else
1521	static inline int bpf_trampoline_link_prog(struct bpf_tramp_link *link,
1522	struct bpf_trampoline *tr,
1523	struct bpf_prog *tgt_prog)
1524	{
1525	return -ENOTSUPP;
1526	}
1527	static inline int bpf_trampoline_unlink_prog(struct bpf_tramp_link *link,
1528	struct bpf_trampoline *tr,
1529	struct bpf_prog *tgt_prog)
1530	{
1531	return -ENOTSUPP;
1532	}
1533	static inline struct bpf_trampoline *bpf_trampoline_get(u64 key,
1534	struct bpf_attach_target_info *tgt_info)
1535	{
1536	return NULL;
1537	}
1538	static inline void bpf_trampoline_put(struct bpf_trampoline *tr) {}
1539	#define DEFINE_BPF_DISPATCHER(name)
1540	#define DECLARE_BPF_DISPATCHER(name)
1541	#define BPF_DISPATCHER_FUNC(name) bpf_dispatcher_nop_func
1542	#define BPF_DISPATCHER_PTR(name) NULL
1543	static inline void bpf_dispatcher_change_prog(struct bpf_dispatcher *d,
1544	struct bpf_prog *from,
1545	struct bpf_prog *to) {}
1546	static inline bool is_bpf_image_address(unsigned long address)
1547	{
1548	return false;
1549	}
1550	static inline bool bpf_prog_has_trampoline(const struct bpf_prog *prog)
1551	{
1552	return false;
1553	}
1554	#endif
1555
1556	struct bpf_func_info_aux {
1557	u16 linkage;
1558	bool unreliable;
1559	bool called : 1;
1560	bool verified : 1;
1561	};
1562
1563	enum bpf_jit_poke_reason {
1564	BPF_POKE_REASON_TAIL_CALL,
1565	};
1566
1567	/* Descriptor of pokes pointing /into/ the JITed image. */
1568	struct bpf_jit_poke_descriptor {
1569	void *tailcall_target;
1570	void *tailcall_bypass;
1571	void *bypass_addr;
1572	void *aux;
1573	union {
1574	struct {
1575	struct bpf_map *map;
1576	u32 key;
1577	} tail_call;
1578	};
1579	bool tailcall_target_stable;
1580	u8 adj_off;
1581	u16 reason;
1582	u32 insn_idx;
1583	};
1584
1585	/* reg_type info for ctx arguments */
1586	struct bpf_ctx_arg_aux {
1587	u32 offset;
1588	enum bpf_reg_type reg_type;
1589	struct btf *btf;
1590	u32 btf_id;
1591	u32 ref_obj_id;
1592	bool refcounted;
1593	};
1594
1595	struct btf_mod_pair {
1596	struct btf *btf;
1597	struct module *module;
1598	};
1599
1600	struct bpf_kfunc_desc_tab;
1601
1602	enum bpf_stream_id {
1603	BPF_STDOUT = 1,
1604	BPF_STDERR = 2,
1605	};
1606
1607	struct bpf_stream_elem {
1608	struct llist_node node;
1609	int total_len;
1610	int consumed_len;
1611	char str[];
1612	};
1613
1614	enum {
1615	/* 100k bytes */
1616	BPF_STREAM_MAX_CAPACITY = 100000ULL,
1617	};
1618
1619	struct bpf_stream {
1620	atomic_t capacity;
1621	struct llist_head log; /* list of in-flight stream elements in LIFO order */
1622
1623	struct mutex lock; /* lock protecting backlog_{head,tail} */
1624	struct llist_node *backlog_head; /* list of in-flight stream elements in FIFO order */
1625	struct llist_node *backlog_tail; /* tail of the list above */
1626	};
1627
1628	struct bpf_stream_stage {
1629	struct llist_head log;
1630	int len;
1631	};
1632
1633	struct bpf_prog_aux {
1634	atomic64_t refcnt;
1635	u32 used_map_cnt;
1636	u32 used_btf_cnt;
1637	u32 max_ctx_offset;
1638	u32 max_pkt_offset;
1639	u32 max_tp_access;
1640	u32 stack_depth;
1641	u32 id;
1642	u32 func_cnt; /* used by non-func prog as the number of func progs */
1643	u32 real_func_cnt; /* includes hidden progs, only used for JIT and freeing progs */
1644	u32 func_idx; /* 0 for non-func prog, the index in func array for func prog */
1645	u32 attach_btf_id; /* in-kernel BTF type id to attach to */
1646	u32 attach_st_ops_member_off;
1647	u32 ctx_arg_info_size;
1648	u32 max_rdonly_access;
1649	u32 max_rdwr_access;
1650	u32 subprog_start;
1651	struct btf *attach_btf;
1652	struct bpf_ctx_arg_aux *ctx_arg_info;
1653	void __percpu *priv_stack_ptr;
1654	struct mutex dst_mutex; /* protects dst_* pointers below, *after* prog becomes visible */
1655	struct bpf_prog *dst_prog;
1656	struct bpf_trampoline *dst_trampoline;
1657	enum bpf_prog_type saved_dst_prog_type;
1658	enum bpf_attach_type saved_dst_attach_type;
1659	bool verifier_zext; /* Zero extensions has been inserted by verifier. */
1660	bool dev_bound; /* Program is bound to the netdev. */
1661	bool offload_requested; /* Program is bound and offloaded to the netdev. */
1662	bool attach_btf_trace; /* true if attaching to BTF-enabled raw tp */
1663	bool attach_tracing_prog; /* true if tracing another tracing program */
1664	bool func_proto_unreliable;
1665	bool tail_call_reachable;
1666	bool xdp_has_frags;
1667	bool exception_cb;
1668	bool exception_boundary;
1669	bool is_extended; /* true if extended by freplace program */
1670	bool jits_use_priv_stack;
1671	bool priv_stack_requested;
1672	bool changes_pkt_data;
1673	bool might_sleep;
1674	bool kprobe_write_ctx;
1675	u64 prog_array_member_cnt; /* counts how many times as member of prog_array */
1676	struct mutex ext_mutex; /* mutex for is_extended and prog_array_member_cnt */
1677	struct bpf_arena *arena;
1678	void (*recursion_detected)(struct bpf_prog *prog); /* callback if recursion is detected */
1679	/* BTF_KIND_FUNC_PROTO for valid attach_btf_id */
1680	const struct btf_type *attach_func_proto;
1681	/* function name for valid attach_btf_id */
1682	const char *attach_func_name;
1683	struct bpf_prog **func;
1684	struct bpf_prog_aux *main_prog_aux;
1685	void *jit_data; /* JIT specific data. arch dependent */
1686	struct bpf_jit_poke_descriptor *poke_tab;
1687	struct bpf_kfunc_desc_tab *kfunc_tab;
1688	struct bpf_kfunc_btf_tab *kfunc_btf_tab;
1689	u32 size_poke_tab;
1690	#ifdef CONFIG_FINEIBT
1691	struct bpf_ksym ksym_prefix;
1692	#endif
1693	struct bpf_ksym ksym;
1694	const struct bpf_prog_ops *ops;
1695	const struct bpf_struct_ops *st_ops;
1696	struct bpf_map **used_maps;
1697	struct mutex used_maps_mutex; /* mutex for used_maps and used_map_cnt */
1698	struct btf_mod_pair *used_btfs;
1699	struct bpf_prog *prog;
1700	struct user_struct *user;
1701	u64 load_time; /* ns since boottime */
1702	u32 verified_insns;
1703	int cgroup_atype; /* enum cgroup_bpf_attach_type */
1704	struct bpf_map *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE];
1705	char name[BPF_OBJ_NAME_LEN];
1706	u64 (*bpf_exception_cb)(u64 cookie, u64 sp, u64 bp, u64, u64);
1707	#ifdef CONFIG_SECURITY
1708	void *security;
1709	#endif
1710	struct bpf_token *token;
1711	struct bpf_prog_offload *offload;
1712	struct btf *btf;
1713	struct bpf_func_info *func_info;
1714	struct bpf_func_info_aux *func_info_aux;
1715	/* bpf_line_info loaded from userspace. linfo->insn_off
1716	* has the xlated insn offset.
1717	* Both the main and sub prog share the same linfo.
1718	* The subprog can access its first linfo by
1719	* using the linfo_idx.
1720	*/
1721	struct bpf_line_info *linfo;
1722	/* jited_linfo is the jited addr of the linfo. It has a
1723	* one to one mapping to linfo:
1724	* jited_linfo[i] is the jited addr for the linfo[i]->insn_off.
1725	* Both the main and sub prog share the same jited_linfo.
1726	* The subprog can access its first jited_linfo by
1727	* using the linfo_idx.
1728	*/
1729	void **jited_linfo;
1730	u32 func_info_cnt;
1731	u32 nr_linfo;
1732	/* subprog can use linfo_idx to access its first linfo and
1733	* jited_linfo.
1734	* main prog always has linfo_idx == 0
1735	*/
1736	u32 linfo_idx;
1737	struct module *mod;
1738	u32 num_exentries;
1739	struct exception_table_entry *extable;
1740	union {
1741	struct work_struct work;
1742	struct rcu_head rcu;
1743	};
1744	struct bpf_stream stream[2];
1745	};
1746
1747	struct bpf_prog {
1748	u16 pages; /* Number of allocated pages */
1749	u16 jited:1, /* Is our filter JIT'ed? */
1750	jit_requested:1,/* archs need to JIT the prog */
1751	gpl_compatible:1, /* Is filter GPL compatible? */
1752	cb_access:1, /* Is control block accessed? */
1753	dst_needed:1, /* Do we need dst entry? */
1754	blinding_requested:1, /* needs constant blinding */
1755	blinded:1, /* Was blinded */
1756	is_func:1, /* program is a bpf function */
1757	kprobe_override:1, /* Do we override a kprobe? */
1758	has_callchain_buf:1, /* callchain buffer allocated? */
1759	enforce_expected_attach_type:1, /* Enforce expected_attach_type checking at attach time */
1760	call_get_stack:1, /* Do we call bpf_get_stack() or bpf_get_stackid() */
1761	call_get_func_ip:1, /* Do we call get_func_ip() */
1762	tstamp_type_access:1, /* Accessed __sk_buff->tstamp_type */
1763	sleepable:1; /* BPF program is sleepable */
1764	enum bpf_prog_type type; /* Type of BPF program */
1765	enum bpf_attach_type expected_attach_type; /* For some prog types */
1766	u32 len; /* Number of filter blocks */
1767	u32 jited_len; /* Size of jited insns in bytes */
1768	union {
1769	u8 digest[SHA256_DIGEST_SIZE];
1770	u8 tag[BPF_TAG_SIZE];
1771	};
1772	struct bpf_prog_stats __percpu *stats;
1773	int __percpu *active;
1774	unsigned int (*bpf_func)(const void *ctx,
1775	const struct bpf_insn *insn);
1776	struct bpf_prog_aux *aux; /* Auxiliary fields */
1777	struct sock_fprog_kern *orig_prog; /* Original BPF program */
1778	/* Instructions for interpreter */
1779	union {
1780	DECLARE_FLEX_ARRAY(struct sock_filter, insns);
1781	DECLARE_FLEX_ARRAY(struct bpf_insn, insnsi);
1782	};
1783	};
1784
1785	struct bpf_array_aux {
1786	/* Programs with direct jumps into programs part of this array. */
1787	struct list_head poke_progs;
1788	struct bpf_map *map;
1789	struct mutex poke_mutex;
1790	struct work_struct work;
1791	};
1792
1793	struct bpf_link {
1794	atomic64_t refcnt;
1795	u32 id;
1796	enum bpf_link_type type;
1797	const struct bpf_link_ops *ops;
1798	struct bpf_prog *prog;
1799
1800	u32 flags;
1801	enum bpf_attach_type attach_type;
1802
1803	/* rcu is used before freeing, work can be used to schedule that
1804	* RCU-based freeing before that, so they never overlap
1805	*/
1806	union {
1807	struct rcu_head rcu;
1808	struct work_struct work;
1809	};
1810	/* whether BPF link itself has "sleepable" semantics, which can differ
1811	* from underlying BPF program having a "sleepable" semantics, as BPF
1812	* link's semantics is determined by target attach hook
1813	*/
1814	bool sleepable;
1815	};
1816
1817	struct bpf_link_ops {
1818	void (*release)(struct bpf_link *link);
1819	/* deallocate link resources callback, called without RCU grace period
1820	* waiting
1821	*/
1822	void (*dealloc)(struct bpf_link *link);
1823	/* deallocate link resources callback, called after RCU grace period;
1824	* if either the underlying BPF program is sleepable or BPF link's
1825	* target hook is sleepable, we'll go through tasks trace RCU GP and
1826	* then "classic" RCU GP; this need for chaining tasks trace and
1827	* classic RCU GPs is designated by setting bpf_link->sleepable flag
1828	*/
1829	void (*dealloc_deferred)(struct bpf_link *link);
1830	int (*detach)(struct bpf_link *link);
1831	int (*update_prog)(struct bpf_link *link, struct bpf_prog *new_prog,
1832	struct bpf_prog *old_prog);
1833	void (*show_fdinfo)(const struct bpf_link *link, struct seq_file *seq);
1834	int (*fill_link_info)(const struct bpf_link *link,
1835	struct bpf_link_info *info);
1836	int (*update_map)(struct bpf_link *link, struct bpf_map *new_map,
1837	struct bpf_map *old_map);
1838	__poll_t (*poll)(struct file *file, struct poll_table_struct *pts);
1839	};
1840
1841	struct bpf_tramp_link {
1842	struct bpf_link link;
1843	struct hlist_node tramp_hlist;
1844	u64 cookie;
1845	};
1846
1847	struct bpf_shim_tramp_link {
1848	struct bpf_tramp_link link;
1849	struct bpf_trampoline *trampoline;
1850	};
1851
1852	struct bpf_tracing_link {
1853	struct bpf_tramp_link link;
1854	struct bpf_trampoline *trampoline;
1855	struct bpf_prog *tgt_prog;
1856	};
1857
1858	struct bpf_raw_tp_link {
1859	struct bpf_link link;
1860	struct bpf_raw_event_map *btp;
1861	u64 cookie;
1862	};
1863
1864	struct bpf_link_primer {
1865	struct bpf_link *link;
1866	struct file *file;
1867	int fd;
1868	u32 id;
1869	};
1870
1871	struct bpf_mount_opts {
1872	kuid_t uid;
1873	kgid_t gid;
1874	umode_t mode;
1875
1876	/* BPF token-related delegation options */
1877	u64 delegate_cmds;
1878	u64 delegate_maps;
1879	u64 delegate_progs;
1880	u64 delegate_attachs;
1881	};
1882
1883	struct bpf_token {
1884	struct work_struct work;
1885	atomic64_t refcnt;
1886	struct user_namespace *userns;
1887	u64 allowed_cmds;
1888	u64 allowed_maps;
1889	u64 allowed_progs;
1890	u64 allowed_attachs;
1891	#ifdef CONFIG_SECURITY
1892	void *security;
1893	#endif
1894	};
1895
1896	struct bpf_struct_ops_value;
1897	struct btf_member;
1898
1899	#define BPF_STRUCT_OPS_MAX_NR_MEMBERS 64
1900	/**
1901	* struct bpf_struct_ops - A structure of callbacks allowing a subsystem to
1902	* define a BPF_MAP_TYPE_STRUCT_OPS map type composed
1903	* of BPF_PROG_TYPE_STRUCT_OPS progs.
1904	* @verifier_ops: A structure of callbacks that are invoked by the verifier
1905	* when determining whether the struct_ops progs in the
1906	* struct_ops map are valid.
1907	* @init: A callback that is invoked a single time, and before any other
1908	* callback, to initialize the structure. A nonzero return value means
1909	* the subsystem could not be initialized.
1910	* @check_member: When defined, a callback invoked by the verifier to allow
1911	* the subsystem to determine if an entry in the struct_ops map
1912	* is valid. A nonzero return value means that the map is
1913	* invalid and should be rejected by the verifier.
1914	* @init_member: A callback that is invoked for each member of the struct_ops
1915	* map to allow the subsystem to initialize the member. A nonzero
1916	* value means the member could not be initialized. This callback
1917	* is exclusive with the @type, @type_id, @value_type, and
1918	* @value_id fields.
1919	* @reg: A callback that is invoked when the struct_ops map has been
1920	* initialized and is being attached to. Zero means the struct_ops map
1921	* has been successfully registered and is live. A nonzero return value
1922	* means the struct_ops map could not be registered.
1923	* @unreg: A callback that is invoked when the struct_ops map should be
1924	* unregistered.
1925	* @update: A callback that is invoked when the live struct_ops map is being
1926	* updated to contain new values. This callback is only invoked when
1927	* the struct_ops map is loaded with BPF_F_LINK. If not defined, the
1928	* it is assumed that the struct_ops map cannot be updated.
1929	* @validate: A callback that is invoked after all of the members have been
1930	* initialized. This callback should perform static checks on the
1931	* map, meaning that it should either fail or succeed
1932	* deterministically. A struct_ops map that has been validated may
1933	* not necessarily succeed in being registered if the call to @reg
1934	* fails. For example, a valid struct_ops map may be loaded, but
1935	* then fail to be registered due to there being another active
1936	* struct_ops map on the system in the subsystem already. For this
1937	* reason, if this callback is not defined, the check is skipped as
1938	* the struct_ops map will have final verification performed in
1939	* @reg.
1940	* @cfi_stubs: Pointer to a structure of stub functions for CFI. These stubs
1941	* provide the correct Control Flow Integrity hashes for the
1942	* trampolines generated by BPF struct_ops.
1943	* @owner: The module that owns this struct_ops. Used for module reference
1944	* counting to ensure the module providing the struct_ops cannot be
1945	* unloaded while in use.
1946	* @name: The name of the struct bpf_struct_ops object.
1947	* @func_models: Func models
1948	*/
1949	struct bpf_struct_ops {
1950	const struct bpf_verifier_ops *verifier_ops;
1951	int (*init)(struct btf *btf);
1952	int (*check_member)(const struct btf_type *t,
1953	const struct btf_member *member,
1954	const struct bpf_prog *prog);
1955	int (*init_member)(const struct btf_type *t,
1956	const struct btf_member *member,
1957	void *kdata, const void *udata);
1958	int (*reg)(void *kdata, struct bpf_link *link);
1959	void (*unreg)(void *kdata, struct bpf_link *link);
1960	int (*update)(void *kdata, void *old_kdata, struct bpf_link *link);
1961	int (*validate)(void *kdata);
1962	void *cfi_stubs;
1963	struct module *owner;
1964	const char *name;
1965	struct btf_func_model func_models[BPF_STRUCT_OPS_MAX_NR_MEMBERS];
1966	};
1967
1968	/* Every member of a struct_ops type has an instance even a member is not
1969	* an operator (function pointer). The "info" field will be assigned to
1970	* prog->aux->ctx_arg_info of BPF struct_ops programs to provide the
1971	* argument information required by the verifier to verify the program.
1972	*
1973	* btf_ctx_access() will lookup prog->aux->ctx_arg_info to find the
1974	* corresponding entry for an given argument.
1975	*/
1976	struct bpf_struct_ops_arg_info {
1977	struct bpf_ctx_arg_aux *info;
1978	u32 cnt;
1979	};
1980
1981	struct bpf_struct_ops_desc {
1982	struct bpf_struct_ops *st_ops;
1983
1984	const struct btf_type *type;
1985	const struct btf_type *value_type;
1986	u32 type_id;
1987	u32 value_id;
1988
1989	/* Collection of argument information for each member */
1990	struct bpf_struct_ops_arg_info *arg_info;
1991	};
1992
1993	enum bpf_struct_ops_state {
1994	BPF_STRUCT_OPS_STATE_INIT,
1995	BPF_STRUCT_OPS_STATE_INUSE,
1996	BPF_STRUCT_OPS_STATE_TOBEFREE,
1997	BPF_STRUCT_OPS_STATE_READY,
1998	};
1999
2000	struct bpf_struct_ops_common_value {
2001	refcount_t refcnt;
2002	enum bpf_struct_ops_state state;
2003	};
2004
2005	#if defined(CONFIG_BPF_JIT) && defined(CONFIG_BPF_SYSCALL)
2006	/* This macro helps developer to register a struct_ops type and generate
2007	* type information correctly. Developers should use this macro to register
2008	* a struct_ops type instead of calling __register_bpf_struct_ops() directly.
2009	*/
2010	#define register_bpf_struct_ops(st_ops, type) \
2011	({ \
2012	struct bpf_struct_ops_##type { \
2013	struct bpf_struct_ops_common_value common; \
2014	struct type data ____cacheline_aligned_in_smp; \
2015	}; \
2016	BTF_TYPE_EMIT(struct bpf_struct_ops_##type); \
2017	__register_bpf_struct_ops(st_ops); \
2018	})
2019	#define BPF_MODULE_OWNER ((void *)((0xeB9FUL << 2) + POISON_POINTER_DELTA))
2020	bool bpf_struct_ops_get(const void *kdata);
2021	void bpf_struct_ops_put(const void *kdata);
2022	int bpf_struct_ops_supported(const struct bpf_struct_ops *st_ops, u32 moff);
2023	int bpf_struct_ops_map_sys_lookup_elem(struct bpf_map *map, void *key,
2024	void *value);
2025	int bpf_struct_ops_prepare_trampoline(struct bpf_tramp_links *tlinks,
2026	struct bpf_tramp_link *link,
2027	const struct btf_func_model *model,
2028	void *stub_func,
2029	void **image, u32 *image_off,
2030	bool allow_alloc);
2031	void bpf_struct_ops_image_free(void *image);
2032	static inline bool bpf_try_module_get(const void *data, struct module *owner)
2033	{
2034	if (owner == BPF_MODULE_OWNER)
2035	return bpf_struct_ops_get(kdata: data);
2036	else
2037	return try_module_get(module: owner);
2038	}
2039	static inline void bpf_module_put(const void *data, struct module *owner)
2040	{
2041	if (owner == BPF_MODULE_OWNER)
2042	bpf_struct_ops_put(kdata: data);
2043	else
2044	module_put(module: owner);
2045	}
2046	int bpf_struct_ops_link_create(union bpf_attr *attr);
2047	u32 bpf_struct_ops_id(const void *kdata);
2048
2049	#ifdef CONFIG_NET
2050	/* Define it here to avoid the use of forward declaration */
2051	struct bpf_dummy_ops_state {
2052	int val;
2053	};
2054
2055	struct bpf_dummy_ops {
2056	int (*test_1)(struct bpf_dummy_ops_state *cb);
2057	int (*test_2)(struct bpf_dummy_ops_state *cb, int a1, unsigned short a2,
2058	char a3, unsigned long a4);
2059	int (*test_sleepable)(struct bpf_dummy_ops_state *cb);
2060	};
2061
2062	int bpf_struct_ops_test_run(struct bpf_prog *prog, const union bpf_attr *kattr,
2063	union bpf_attr __user *uattr);
2064	#endif
2065	int bpf_struct_ops_desc_init(struct bpf_struct_ops_desc *st_ops_desc,
2066	struct btf *btf,
2067	struct bpf_verifier_log *log);
2068	void bpf_map_struct_ops_info_fill(struct bpf_map_info *info, struct bpf_map *map);
2069	void bpf_struct_ops_desc_release(struct bpf_struct_ops_desc *st_ops_desc);
2070	#else
2071	#define register_bpf_struct_ops(st_ops, type) ({ (void *)(st_ops); 0; })
2072	static inline bool bpf_try_module_get(const void *data, struct module *owner)
2073	{
2074	return try_module_get(owner);
2075	}
2076	static inline void bpf_module_put(const void *data, struct module *owner)
2077	{
2078	module_put(owner);
2079	}
2080	static inline int bpf_struct_ops_supported(const struct bpf_struct_ops *st_ops, u32 moff)
2081	{
2082	return -ENOTSUPP;
2083	}
2084	static inline int bpf_struct_ops_map_sys_lookup_elem(struct bpf_map *map,
2085	void *key,
2086	void *value)
2087	{
2088	return -EINVAL;
2089	}
2090	static inline int bpf_struct_ops_link_create(union bpf_attr *attr)
2091	{
2092	return -EOPNOTSUPP;
2093	}
2094	static inline void bpf_map_struct_ops_info_fill(struct bpf_map_info *info, struct bpf_map *map)
2095	{
2096	}
2097
2098	static inline void bpf_struct_ops_desc_release(struct bpf_struct_ops_desc *st_ops_desc)
2099	{
2100	}
2101
2102	#endif
2103
2104	int bpf_prog_ctx_arg_info_init(struct bpf_prog *prog,
2105	const struct bpf_ctx_arg_aux *info, u32 cnt);
2106
2107	#if defined(CONFIG_CGROUP_BPF) && defined(CONFIG_BPF_LSM)
2108	int bpf_trampoline_link_cgroup_shim(struct bpf_prog *prog,
2109	int cgroup_atype,
2110	enum bpf_attach_type attach_type);
2111	void bpf_trampoline_unlink_cgroup_shim(struct bpf_prog *prog);
2112	#else
2113	static inline int bpf_trampoline_link_cgroup_shim(struct bpf_prog *prog,
2114	int cgroup_atype,
2115	enum bpf_attach_type attach_type)
2116	{
2117	return -EOPNOTSUPP;
2118	}
2119	static inline void bpf_trampoline_unlink_cgroup_shim(struct bpf_prog *prog)
2120	{
2121	}
2122	#endif
2123
2124	struct bpf_array {
2125	struct bpf_map map;
2126	u32 elem_size;
2127	u32 index_mask;
2128	struct bpf_array_aux *aux;
2129	union {
2130	DECLARE_FLEX_ARRAY(char, value) __aligned(8);
2131	DECLARE_FLEX_ARRAY(void *, ptrs) __aligned(8);
2132	DECLARE_FLEX_ARRAY(void __percpu *, pptrs) __aligned(8);
2133	};
2134	};
2135
2136	/*
2137	* The bpf_array_get_next_key() function may be used for all array-like
2138	* maps, i.e., maps with u32 keys with range [0 ,..., max_entries)
2139	*/
2140	int bpf_array_get_next_key(struct bpf_map *map, void *key, void *next_key);
2141
2142	#define BPF_COMPLEXITY_LIMIT_INSNS 1000000 /* yes. 1M insns */
2143	#define MAX_TAIL_CALL_CNT 33
2144
2145	/* Maximum number of loops for bpf_loop and bpf_iter_num.
2146	* It's enum to expose it (and thus make it discoverable) through BTF.
2147	*/
2148	enum {
2149	BPF_MAX_LOOPS = 8 * 1024 * 1024,
2150	BPF_MAX_TIMED_LOOPS = 0xffff,
2151	};
2152
2153	#define BPF_F_ACCESS_MASK (BPF_F_RDONLY | \
2154	BPF_F_RDONLY_PROG | \
2155	BPF_F_WRONLY | \
2156	BPF_F_WRONLY_PROG)
2157
2158	#define BPF_MAP_CAN_READ BIT(0)
2159	#define BPF_MAP_CAN_WRITE BIT(1)
2160
2161	/* Maximum number of user-producer ring buffer samples that can be drained in
2162	* a call to bpf_user_ringbuf_drain().
2163	*/
2164	#define BPF_MAX_USER_RINGBUF_SAMPLES (128 * 1024)
2165
2166	static inline u32 bpf_map_flags_to_cap(struct bpf_map *map)
2167	{
2168	u32 access_flags = map->map_flags & (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG);
2169
2170	/* Combination of BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG is
2171	* not possible.
2172	*/
2173	if (access_flags & BPF_F_RDONLY_PROG)
2174	return BPF_MAP_CAN_READ;
2175	else if (access_flags & BPF_F_WRONLY_PROG)
2176	return BPF_MAP_CAN_WRITE;
2177	else
2178	return BPF_MAP_CAN_READ | BPF_MAP_CAN_WRITE;
2179	}
2180
2181	static inline bool bpf_map_flags_access_ok(u32 access_flags)
2182	{
2183	return (access_flags & (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG)) !=
2184	(BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG);
2185	}
2186
2187	static inline struct bpf_map_owner *bpf_map_owner_alloc(struct bpf_map *map)
2188	{
2189	return kzalloc(sizeof(*map->owner), GFP_ATOMIC);
2190	}
2191
2192	static inline void bpf_map_owner_free(struct bpf_map *map)
2193	{
2194	kfree(objp: map->owner);
2195	}
2196
2197	struct bpf_event_entry {
2198	struct perf_event *event;
2199	struct file *perf_file;
2200	struct file *map_file;
2201	struct rcu_head rcu;
2202	};
2203
2204	static inline bool map_type_contains_progs(struct bpf_map *map)
2205	{
2206	return map->map_type == BPF_MAP_TYPE_PROG_ARRAY ||
2207	map->map_type == BPF_MAP_TYPE_DEVMAP ||
2208	map->map_type == BPF_MAP_TYPE_CPUMAP;
2209	}
2210
2211	bool bpf_prog_map_compatible(struct bpf_map *map, const struct bpf_prog *fp);
2212	int bpf_prog_calc_tag(struct bpf_prog *fp);
2213
2214	const struct bpf_func_proto *bpf_get_trace_printk_proto(void);
2215	const struct bpf_func_proto *bpf_get_trace_vprintk_proto(void);
2216
2217	const struct bpf_func_proto *bpf_get_perf_event_read_value_proto(void);
2218
2219	typedef unsigned long (*bpf_ctx_copy_t)(void *dst, const void *src,
2220	unsigned long off, unsigned long len);
2221	typedef u32 (*bpf_convert_ctx_access_t)(enum bpf_access_type type,
2222	const struct bpf_insn *src,
2223	struct bpf_insn *dst,
2224	struct bpf_prog *prog,
2225	u32 *target_size);
2226
2227	u64 bpf_event_output(struct bpf_map *map, u64 flags, void *meta, u64 meta_size,
2228	void *ctx, u64 ctx_size, bpf_ctx_copy_t ctx_copy);
2229
2230	/* an array of programs to be executed under rcu_lock.
2231	*
2232	* Typical usage:
2233	* ret = bpf_prog_run_array(rcu_dereference(&bpf_prog_array), ctx, bpf_prog_run);
2234	*
2235	* the structure returned by bpf_prog_array_alloc() should be populated
2236	* with program pointers and the last pointer must be NULL.
2237	* The user has to keep refcnt on the program and make sure the program
2238	* is removed from the array before bpf_prog_put().
2239	* The 'struct bpf_prog_array *' should only be replaced with xchg()
2240	* since other cpus are walking the array of pointers in parallel.
2241	*/
2242	struct bpf_prog_array_item {
2243	struct bpf_prog *prog;
2244	union {
2245	struct bpf_cgroup_storage *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE];
2246	u64 bpf_cookie;
2247	};
2248	};
2249
2250	struct bpf_prog_array {
2251	struct rcu_head rcu;
2252	struct bpf_prog_array_item items[];
2253	};
2254
2255	struct bpf_empty_prog_array {
2256	struct bpf_prog_array hdr;
2257	struct bpf_prog *null_prog;
2258	};
2259
2260	/* to avoid allocating empty bpf_prog_array for cgroups that
2261	* don't have bpf program attached use one global 'bpf_empty_prog_array'
2262	* It will not be modified the caller of bpf_prog_array_alloc()
2263	* (since caller requested prog_cnt == 0)
2264	* that pointer should be 'freed' by bpf_prog_array_free()
2265	*/
2266	extern struct bpf_empty_prog_array bpf_empty_prog_array;
2267
2268	struct bpf_prog_array *bpf_prog_array_alloc(u32 prog_cnt, gfp_t flags);
2269	void bpf_prog_array_free(struct bpf_prog_array *progs);
2270	/* Use when traversal over the bpf_prog_array uses tasks_trace rcu */
2271	void bpf_prog_array_free_sleepable(struct bpf_prog_array *progs);
2272	int bpf_prog_array_length(struct bpf_prog_array *progs);
2273	bool bpf_prog_array_is_empty(struct bpf_prog_array *array);
2274	int bpf_prog_array_copy_to_user(struct bpf_prog_array *progs,
2275	__u32 __user *prog_ids, u32 cnt);
2276
2277	void bpf_prog_array_delete_safe(struct bpf_prog_array *progs,
2278	struct bpf_prog *old_prog);
2279	int bpf_prog_array_delete_safe_at(struct bpf_prog_array *array, int index);
2280	int bpf_prog_array_update_at(struct bpf_prog_array *array, int index,
2281	struct bpf_prog *prog);
2282	int bpf_prog_array_copy_info(struct bpf_prog_array *array,
2283	u32 *prog_ids, u32 request_cnt,
2284	u32 *prog_cnt);
2285	int bpf_prog_array_copy(struct bpf_prog_array *old_array,
2286	struct bpf_prog *exclude_prog,
2287	struct bpf_prog *include_prog,
2288	u64 bpf_cookie,
2289	struct bpf_prog_array **new_array);
2290
2291	struct bpf_run_ctx {};
2292
2293	struct bpf_cg_run_ctx {
2294	struct bpf_run_ctx run_ctx;
2295	const struct bpf_prog_array_item *prog_item;
2296	int retval;
2297	};
2298
2299	struct bpf_trace_run_ctx {
2300	struct bpf_run_ctx run_ctx;
2301	u64 bpf_cookie;
2302	bool is_uprobe;
2303	};
2304
2305	struct bpf_tramp_run_ctx {
2306	struct bpf_run_ctx run_ctx;
2307	u64 bpf_cookie;
2308	struct bpf_run_ctx *saved_run_ctx;
2309	};
2310
2311	static inline struct bpf_run_ctx *bpf_set_run_ctx(struct bpf_run_ctx *new_ctx)
2312	{
2313	struct bpf_run_ctx *old_ctx = NULL;
2314
2315	#ifdef CONFIG_BPF_SYSCALL
2316	old_ctx = current->bpf_ctx;
2317	current->bpf_ctx = new_ctx;
2318	#endif
2319	return old_ctx;
2320	}
2321
2322	static inline void bpf_reset_run_ctx(struct bpf_run_ctx *old_ctx)
2323	{
2324	#ifdef CONFIG_BPF_SYSCALL
2325	current->bpf_ctx = old_ctx;
2326	#endif
2327	}
2328
2329	/* BPF program asks to bypass CAP_NET_BIND_SERVICE in bind. */
2330	#define BPF_RET_BIND_NO_CAP_NET_BIND_SERVICE (1 << 0)
2331	/* BPF program asks to set CN on the packet. */
2332	#define BPF_RET_SET_CN (1 << 0)
2333
2334	typedef u32 (*bpf_prog_run_fn)(const struct bpf_prog *prog, const void *ctx);
2335
2336	static __always_inline u32
2337	bpf_prog_run_array(const struct bpf_prog_array *array,
2338	const void *ctx, bpf_prog_run_fn run_prog)
2339	{
2340	const struct bpf_prog_array_item *item;
2341	const struct bpf_prog *prog;
2342	struct bpf_run_ctx *old_run_ctx;
2343	struct bpf_trace_run_ctx run_ctx;
2344	u32 ret = 1;
2345
2346	RCU_LOCKDEP_WARN(!rcu_read_lock_held(), "no rcu lock held");
2347
2348	if (unlikely(!array))
2349	return ret;
2350
2351	run_ctx.is_uprobe = false;
2352
2353	migrate_disable();
2354	old_run_ctx = bpf_set_run_ctx(new_ctx: &run_ctx.run_ctx);
2355	item = &array->items[0];
2356	while ((prog = READ_ONCE(item->prog))) {
2357	run_ctx.bpf_cookie = item->bpf_cookie;
2358	ret &= run_prog(prog, ctx);
2359	item++;
2360	}
2361	bpf_reset_run_ctx(old_ctx: old_run_ctx);
2362	migrate_enable();
2363	return ret;
2364	}
2365
2366	/* Notes on RCU design for bpf_prog_arrays containing sleepable programs:
2367	*
2368	* We use the tasks_trace rcu flavor read section to protect the bpf_prog_array
2369	* overall. As a result, we must use the bpf_prog_array_free_sleepable
2370	* in order to use the tasks_trace rcu grace period.
2371	*
2372	* When a non-sleepable program is inside the array, we take the rcu read
2373	* section and disable preemption for that program alone, so it can access
2374	* rcu-protected dynamically sized maps.
2375	*/
2376	static __always_inline u32
2377	bpf_prog_run_array_uprobe(const struct bpf_prog_array *array,
2378	const void *ctx, bpf_prog_run_fn run_prog)
2379	{
2380	const struct bpf_prog_array_item *item;
2381	const struct bpf_prog *prog;
2382	struct bpf_run_ctx *old_run_ctx;
2383	struct bpf_trace_run_ctx run_ctx;
2384	u32 ret = 1;
2385
2386	might_fault();
2387	RCU_LOCKDEP_WARN(!rcu_read_lock_trace_held(), "no rcu lock held");
2388
2389	if (unlikely(!array))
2390	return ret;
2391
2392	migrate_disable();
2393
2394	run_ctx.is_uprobe = true;
2395
2396	old_run_ctx = bpf_set_run_ctx(new_ctx: &run_ctx.run_ctx);
2397	item = &array->items[0];
2398	while ((prog = READ_ONCE(item->prog))) {
2399	if (!prog->sleepable)
2400	rcu_read_lock();
2401
2402	run_ctx.bpf_cookie = item->bpf_cookie;
2403	ret &= run_prog(prog, ctx);
2404	item++;
2405
2406	if (!prog->sleepable)
2407	rcu_read_unlock();
2408	}
2409	bpf_reset_run_ctx(old_ctx: old_run_ctx);
2410	migrate_enable();
2411	return ret;
2412	}
2413
2414	bool bpf_jit_bypass_spec_v1(void);
2415	bool bpf_jit_bypass_spec_v4(void);
2416
2417	#define bpf_rcu_lock_held() \
2418	(rcu_read_lock_held() || rcu_read_lock_trace_held() || rcu_read_lock_bh_held())
2419
2420	#ifdef CONFIG_BPF_SYSCALL
2421	DECLARE_PER_CPU(int, bpf_prog_active);
2422	extern struct mutex bpf_stats_enabled_mutex;
2423
2424	/*
2425	* Block execution of BPF programs attached to instrumentation (perf,
2426	* kprobes, tracepoints) to prevent deadlocks on map operations as any of
2427	* these events can happen inside a region which holds a map bucket lock
2428	* and can deadlock on it.
2429	*/
2430	static inline void bpf_disable_instrumentation(void)
2431	{
2432	migrate_disable();
2433	this_cpu_inc(bpf_prog_active);
2434	}
2435
2436	static inline void bpf_enable_instrumentation(void)
2437	{
2438	this_cpu_dec(bpf_prog_active);
2439	migrate_enable();
2440	}
2441
2442	extern const struct super_operations bpf_super_ops;
2443	extern const struct file_operations bpf_map_fops;
2444	extern const struct file_operations bpf_prog_fops;
2445	extern const struct file_operations bpf_iter_fops;
2446	extern const struct file_operations bpf_token_fops;
2447
2448	#define BPF_PROG_TYPE(_id, _name, prog_ctx_type, kern_ctx_type) \
2449	extern const struct bpf_prog_ops _name ## _prog_ops; \
2450	extern const struct bpf_verifier_ops _name ## _verifier_ops;
2451	#define BPF_MAP_TYPE(_id, _ops) \
2452	extern const struct bpf_map_ops _ops;
2453	#define BPF_LINK_TYPE(_id, _name)
2454	#include <linux/bpf_types.h>
2455	#undef BPF_PROG_TYPE
2456	#undef BPF_MAP_TYPE
2457	#undef BPF_LINK_TYPE
2458
2459	extern const struct bpf_prog_ops bpf_offload_prog_ops;
2460	extern const struct bpf_verifier_ops tc_cls_act_analyzer_ops;
2461	extern const struct bpf_verifier_ops xdp_analyzer_ops;
2462
2463	struct bpf_prog *bpf_prog_get(u32 ufd);
2464	struct bpf_prog *bpf_prog_get_type_dev(u32 ufd, enum bpf_prog_type type,
2465	bool attach_drv);
2466	void bpf_prog_add(struct bpf_prog *prog, int i);
2467	void bpf_prog_sub(struct bpf_prog *prog, int i);
2468	void bpf_prog_inc(struct bpf_prog *prog);
2469	struct bpf_prog * __must_check bpf_prog_inc_not_zero(struct bpf_prog *prog);
2470	void bpf_prog_put(struct bpf_prog *prog);
2471
2472	void bpf_prog_free_id(struct bpf_prog *prog);
2473	void bpf_map_free_id(struct bpf_map *map);
2474
2475	struct btf_field *btf_record_find(const struct btf_record *rec,
2476	u32 offset, u32 field_mask);
2477	void btf_record_free(struct btf_record *rec);
2478	void bpf_map_free_record(struct bpf_map *map);
2479	struct btf_record *btf_record_dup(const struct btf_record *rec);
2480	bool btf_record_equal(const struct btf_record *rec_a, const struct btf_record *rec_b);
2481	void bpf_obj_free_timer(const struct btf_record *rec, void *obj);
2482	void bpf_obj_free_workqueue(const struct btf_record *rec, void *obj);
2483	void bpf_obj_free_task_work(const struct btf_record *rec, void *obj);
2484	void bpf_obj_free_fields(const struct btf_record *rec, void *obj);
2485	void __bpf_obj_drop_impl(void *p, const struct btf_record *rec, bool percpu);
2486
2487	struct bpf_map *bpf_map_get(u32 ufd);
2488	struct bpf_map *bpf_map_get_with_uref(u32 ufd);
2489
2490	/*
2491	* The __bpf_map_get() and __btf_get_by_fd() functions parse a file
2492	* descriptor and return a corresponding map or btf object.
2493	* Their names are double underscored to emphasize the fact that they
2494	* do not increase refcnt. To also increase refcnt use corresponding
2495	* bpf_map_get() and btf_get_by_fd() functions.
2496	*/
2497
2498	static inline struct bpf_map *__bpf_map_get(struct fd f)
2499	{
2500	if (fd_empty(f))
2501	return ERR_PTR(error: -EBADF);
2502	if (unlikely(fd_file(f)->f_op != &bpf_map_fops))
2503	return ERR_PTR(error: -EINVAL);
2504	return fd_file(f)->private_data;
2505	}
2506
2507	static inline struct btf *__btf_get_by_fd(struct fd f)
2508	{
2509	if (fd_empty(f))
2510	return ERR_PTR(error: -EBADF);
2511	if (unlikely(fd_file(f)->f_op != &btf_fops))
2512	return ERR_PTR(error: -EINVAL);
2513	return fd_file(f)->private_data;
2514	}
2515
2516	void bpf_map_inc(struct bpf_map *map);
2517	void bpf_map_inc_with_uref(struct bpf_map *map);
2518	struct bpf_map *__bpf_map_inc_not_zero(struct bpf_map *map, bool uref);
2519	struct bpf_map * __must_check bpf_map_inc_not_zero(struct bpf_map *map);
2520	void bpf_map_put_with_uref(struct bpf_map *map);
2521	void bpf_map_put(struct bpf_map *map);
2522	void *bpf_map_area_alloc(u64 size, int numa_node);
2523	void *bpf_map_area_mmapable_alloc(u64 size, int numa_node);
2524	void bpf_map_area_free(void *base);
2525	bool bpf_map_write_active(const struct bpf_map *map);
2526	void bpf_map_init_from_attr(struct bpf_map *map, union bpf_attr *attr);
2527	int generic_map_lookup_batch(struct bpf_map *map,
2528	const union bpf_attr *attr,
2529	union bpf_attr __user *uattr);
2530	int generic_map_update_batch(struct bpf_map *map, struct file *map_file,
2531	const union bpf_attr *attr,
2532	union bpf_attr __user *uattr);
2533	int generic_map_delete_batch(struct bpf_map *map,
2534	const union bpf_attr *attr,
2535	union bpf_attr __user *uattr);
2536	struct bpf_map *bpf_map_get_curr_or_next(u32 *id);
2537	struct bpf_prog *bpf_prog_get_curr_or_next(u32 *id);
2538
2539
2540	int bpf_map_alloc_pages(const struct bpf_map *map, int nid,
2541	unsigned long nr_pages, struct page **page_array);
2542	#ifdef CONFIG_MEMCG
2543	void *bpf_map_kmalloc_node(const struct bpf_map *map, size_t size, gfp_t flags,
2544	int node);
2545	void *bpf_map_kmalloc_nolock(const struct bpf_map *map, size_t size, gfp_t flags,
2546	int node);
2547	void *bpf_map_kzalloc(const struct bpf_map *map, size_t size, gfp_t flags);
2548	void *bpf_map_kvcalloc(struct bpf_map *map, size_t n, size_t size,
2549	gfp_t flags);
2550	void __percpu *bpf_map_alloc_percpu(const struct bpf_map *map, size_t size,
2551	size_t align, gfp_t flags);
2552	#else
2553	/*
2554	* These specialized allocators have to be macros for their allocations to be
2555	* accounted separately (to have separate alloc_tag).
2556	*/
2557	#define bpf_map_kmalloc_node(_map, _size, _flags, _node) \
2558	kmalloc_node(_size, _flags, _node)
2559	#define bpf_map_kmalloc_nolock(_map, _size, _flags, _node) \
2560	kmalloc_nolock(_size, _flags, _node)
2561	#define bpf_map_kzalloc(_map, _size, _flags) \
2562	kzalloc(_size, _flags)
2563	#define bpf_map_kvcalloc(_map, _n, _size, _flags) \
2564	kvcalloc(_n, _size, _flags)
2565	#define bpf_map_alloc_percpu(_map, _size, _align, _flags) \
2566	__alloc_percpu_gfp(_size, _align, _flags)
2567	#endif
2568
2569	static inline int
2570	bpf_map_init_elem_count(struct bpf_map *map)
2571	{
2572	size_t size = sizeof(*map->elem_count), align = size;
2573	gfp_t flags = GFP_USER | __GFP_NOWARN;
2574
2575	map->elem_count = bpf_map_alloc_percpu(map, size, align, flags);
2576	if (!map->elem_count)
2577	return -ENOMEM;
2578
2579	return 0;
2580	}
2581
2582	static inline void
2583	bpf_map_free_elem_count(struct bpf_map *map)
2584	{
2585	free_percpu(pdata: map->elem_count);
2586	}
2587
2588	static inline void bpf_map_inc_elem_count(struct bpf_map *map)
2589	{
2590	this_cpu_inc(*map->elem_count);
2591	}
2592
2593	static inline void bpf_map_dec_elem_count(struct bpf_map *map)
2594	{
2595	this_cpu_dec(*map->elem_count);
2596	}
2597
2598	extern int sysctl_unprivileged_bpf_disabled;
2599
2600	bool bpf_token_capable(const struct bpf_token *token, int cap);
2601
2602	static inline bool bpf_allow_ptr_leaks(const struct bpf_token *token)
2603	{
2604	return bpf_token_capable(token, CAP_PERFMON);
2605	}
2606
2607	static inline bool bpf_allow_uninit_stack(const struct bpf_token *token)
2608	{
2609	return bpf_token_capable(token, CAP_PERFMON);
2610	}
2611
2612	static inline bool bpf_bypass_spec_v1(const struct bpf_token *token)
2613	{
2614	return bpf_jit_bypass_spec_v1() ||
2615	cpu_mitigations_off() ||
2616	bpf_token_capable(token, CAP_PERFMON);
2617	}
2618
2619	static inline bool bpf_bypass_spec_v4(const struct bpf_token *token)
2620	{
2621	return bpf_jit_bypass_spec_v4() ||
2622	cpu_mitigations_off() ||
2623	bpf_token_capable(token, CAP_PERFMON);
2624	}
2625
2626	int bpf_map_new_fd(struct bpf_map *map, int flags);
2627	int bpf_prog_new_fd(struct bpf_prog *prog);
2628
2629	void bpf_link_init(struct bpf_link *link, enum bpf_link_type type,
2630	const struct bpf_link_ops *ops, struct bpf_prog *prog,
2631	enum bpf_attach_type attach_type);
2632	void bpf_link_init_sleepable(struct bpf_link *link, enum bpf_link_type type,
2633	const struct bpf_link_ops *ops, struct bpf_prog *prog,
2634	enum bpf_attach_type attach_type, bool sleepable);
2635	int bpf_link_prime(struct bpf_link *link, struct bpf_link_primer *primer);
2636	int bpf_link_settle(struct bpf_link_primer *primer);
2637	void bpf_link_cleanup(struct bpf_link_primer *primer);
2638	void bpf_link_inc(struct bpf_link *link);
2639	struct bpf_link *bpf_link_inc_not_zero(struct bpf_link *link);
2640	void bpf_link_put(struct bpf_link *link);
2641	int bpf_link_new_fd(struct bpf_link *link);
2642	struct bpf_link *bpf_link_get_from_fd(u32 ufd);
2643	struct bpf_link *bpf_link_get_curr_or_next(u32 *id);
2644
2645	void bpf_token_inc(struct bpf_token *token);
2646	void bpf_token_put(struct bpf_token *token);
2647	int bpf_token_create(union bpf_attr *attr);
2648	struct bpf_token *bpf_token_get_from_fd(u32 ufd);
2649	int bpf_token_get_info_by_fd(struct bpf_token *token,
2650	const union bpf_attr *attr,
2651	union bpf_attr __user *uattr);
2652
2653	bool bpf_token_allow_cmd(const struct bpf_token *token, enum bpf_cmd cmd);
2654	bool bpf_token_allow_map_type(const struct bpf_token *token, enum bpf_map_type type);
2655	bool bpf_token_allow_prog_type(const struct bpf_token *token,
2656	enum bpf_prog_type prog_type,
2657	enum bpf_attach_type attach_type);
2658
2659	int bpf_obj_pin_user(u32 ufd, int path_fd, const char __user *pathname);
2660	int bpf_obj_get_user(int path_fd, const char __user *pathname, int flags);
2661	struct inode *bpf_get_inode(struct super_block *sb, const struct inode *dir,
2662	umode_t mode);
2663
2664	#define BPF_ITER_FUNC_PREFIX "bpf_iter_"
2665	#define DEFINE_BPF_ITER_FUNC(target, args...) \
2666	extern int bpf_iter_ ## target(args); \
2667	int __init bpf_iter_ ## target(args) { return 0; }
2668
2669	/*
2670	* The task type of iterators.
2671	*
2672	* For BPF task iterators, they can be parameterized with various
2673	* parameters to visit only some of tasks.
2674	*
2675	* BPF_TASK_ITER_ALL (default)
2676	* Iterate over resources of every task.
2677	*
2678	* BPF_TASK_ITER_TID
2679	* Iterate over resources of a task/tid.
2680	*
2681	* BPF_TASK_ITER_TGID
2682	* Iterate over resources of every task of a process / task group.
2683	*/
2684	enum bpf_iter_task_type {
2685	BPF_TASK_ITER_ALL = 0,
2686	BPF_TASK_ITER_TID,
2687	BPF_TASK_ITER_TGID,
2688	};
2689
2690	struct bpf_iter_aux_info {
2691	/* for map_elem iter */
2692	struct bpf_map *map;
2693
2694	/* for cgroup iter */
2695	struct {
2696	struct cgroup *start; /* starting cgroup */
2697	enum bpf_cgroup_iter_order order;
2698	} cgroup;
2699	struct {
2700	enum bpf_iter_task_type type;
2701	u32 pid;
2702	} task;
2703	};
2704
2705	typedef int (*bpf_iter_attach_target_t)(struct bpf_prog *prog,
2706	union bpf_iter_link_info *linfo,
2707	struct bpf_iter_aux_info *aux);
2708	typedef void (*bpf_iter_detach_target_t)(struct bpf_iter_aux_info *aux);
2709	typedef void (*bpf_iter_show_fdinfo_t) (const struct bpf_iter_aux_info *aux,
2710	struct seq_file *seq);
2711	typedef int (*bpf_iter_fill_link_info_t)(const struct bpf_iter_aux_info *aux,
2712	struct bpf_link_info *info);
2713	typedef const struct bpf_func_proto *
2714	(*bpf_iter_get_func_proto_t)(enum bpf_func_id func_id,
2715	const struct bpf_prog *prog);
2716
2717	enum bpf_iter_feature {
2718	BPF_ITER_RESCHED = BIT(0),
2719	};
2720
2721	#define BPF_ITER_CTX_ARG_MAX 2
2722	struct bpf_iter_reg {
2723	const char *target;
2724	bpf_iter_attach_target_t attach_target;
2725	bpf_iter_detach_target_t detach_target;
2726	bpf_iter_show_fdinfo_t show_fdinfo;
2727	bpf_iter_fill_link_info_t fill_link_info;
2728	bpf_iter_get_func_proto_t get_func_proto;
2729	u32 ctx_arg_info_size;
2730	u32 feature;
2731	struct bpf_ctx_arg_aux ctx_arg_info[BPF_ITER_CTX_ARG_MAX];
2732	const struct bpf_iter_seq_info *seq_info;
2733	};
2734
2735	struct bpf_iter_meta {
2736	__bpf_md_ptr(struct seq_file *, seq);
2737	u64 session_id;
2738	u64 seq_num;
2739	};
2740
2741	struct bpf_iter__bpf_map_elem {
2742	__bpf_md_ptr(struct bpf_iter_meta *, meta);
2743	__bpf_md_ptr(struct bpf_map *, map);
2744	__bpf_md_ptr(void *, key);
2745	__bpf_md_ptr(void *, value);
2746	};
2747
2748	int bpf_iter_reg_target(const struct bpf_iter_reg *reg_info);
2749	void bpf_iter_unreg_target(const struct bpf_iter_reg *reg_info);
2750	int bpf_iter_prog_supported(struct bpf_prog *prog);
2751	const struct bpf_func_proto *
2752	bpf_iter_get_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog);
2753	int bpf_iter_link_attach(const union bpf_attr *attr, bpfptr_t uattr, struct bpf_prog *prog);
2754	int bpf_iter_new_fd(struct bpf_link *link);
2755	bool bpf_link_is_iter(struct bpf_link *link);
2756	struct bpf_prog *bpf_iter_get_info(struct bpf_iter_meta *meta, bool in_stop);
2757	int bpf_iter_run_prog(struct bpf_prog *prog, void *ctx);
2758	void bpf_iter_map_show_fdinfo(const struct bpf_iter_aux_info *aux,
2759	struct seq_file *seq);
2760	int bpf_iter_map_fill_link_info(const struct bpf_iter_aux_info *aux,
2761	struct bpf_link_info *info);
2762
2763	int map_set_for_each_callback_args(struct bpf_verifier_env *env,
2764	struct bpf_func_state *caller,
2765	struct bpf_func_state *callee);
2766
2767	int bpf_percpu_hash_copy(struct bpf_map *map, void *key, void *value);
2768	int bpf_percpu_array_copy(struct bpf_map *map, void *key, void *value);
2769	int bpf_percpu_hash_update(struct bpf_map *map, void *key, void *value,
2770	u64 flags);
2771	int bpf_percpu_array_update(struct bpf_map *map, void *key, void *value,
2772	u64 flags);
2773
2774	int bpf_stackmap_extract(struct bpf_map *map, void *key, void *value, bool delete);
2775
2776	int bpf_fd_array_map_update_elem(struct bpf_map *map, struct file *map_file,
2777	void *key, void *value, u64 map_flags);
2778	int bpf_fd_array_map_lookup_elem(struct bpf_map *map, void *key, u32 *value);
2779	int bpf_fd_htab_map_update_elem(struct bpf_map *map, struct file *map_file,
2780	void *key, void *value, u64 map_flags);
2781	int bpf_fd_htab_map_lookup_elem(struct bpf_map *map, void *key, u32 *value);
2782
2783	int bpf_get_file_flag(int flags);
2784	int bpf_check_uarg_tail_zero(bpfptr_t uaddr, size_t expected_size,
2785	size_t actual_size);
2786
2787	/* verify correctness of eBPF program */
2788	int bpf_check(struct bpf_prog **fp, union bpf_attr *attr, bpfptr_t uattr, u32 uattr_size);
2789
2790	#ifndef CONFIG_BPF_JIT_ALWAYS_ON
2791	void bpf_patch_call_args(struct bpf_insn *insn, u32 stack_depth);
2792	#endif
2793
2794	struct btf *bpf_get_btf_vmlinux(void);
2795
2796	/* Map specifics */
2797	struct xdp_frame;
2798	struct sk_buff;
2799	struct bpf_dtab_netdev;
2800	struct bpf_cpu_map_entry;
2801
2802	void __dev_flush(struct list_head *flush_list);
2803	int dev_xdp_enqueue(struct net_device *dev, struct xdp_frame *xdpf,
2804	struct net_device *dev_rx);
2805	int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_frame *xdpf,
2806	struct net_device *dev_rx);
2807	int dev_map_enqueue_multi(struct xdp_frame *xdpf, struct net_device *dev_rx,
2808	struct bpf_map *map, bool exclude_ingress);
2809	int dev_map_generic_redirect(struct bpf_dtab_netdev *dst, struct sk_buff *skb,
2810	const struct bpf_prog *xdp_prog);
2811	int dev_map_redirect_multi(struct net_device *dev, struct sk_buff *skb,
2812	const struct bpf_prog *xdp_prog,
2813	struct bpf_map *map, bool exclude_ingress);
2814
2815	void __cpu_map_flush(struct list_head *flush_list);
2816	int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu, struct xdp_frame *xdpf,
2817	struct net_device *dev_rx);
2818	int cpu_map_generic_redirect(struct bpf_cpu_map_entry *rcpu,
2819	struct sk_buff *skb);
2820
2821	/* Return map's numa specified by userspace */
2822	static inline int bpf_map_attr_numa_node(const union bpf_attr *attr)
2823	{
2824	return (attr->map_flags & BPF_F_NUMA_NODE) ?
2825	attr->numa_node : NUMA_NO_NODE;
2826	}
2827
2828	struct bpf_prog *bpf_prog_get_type_path(const char *name, enum bpf_prog_type type);
2829	int array_map_alloc_check(union bpf_attr *attr);
2830
2831	int bpf_prog_test_run_xdp(struct bpf_prog *prog, const union bpf_attr *kattr,
2832	union bpf_attr __user *uattr);
2833	int bpf_prog_test_run_skb(struct bpf_prog *prog, const union bpf_attr *kattr,
2834	union bpf_attr __user *uattr);
2835	int bpf_prog_test_run_tracing(struct bpf_prog *prog,
2836	const union bpf_attr *kattr,
2837	union bpf_attr __user *uattr);
2838	int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog,
2839	const union bpf_attr *kattr,
2840	union bpf_attr __user *uattr);
2841	int bpf_prog_test_run_raw_tp(struct bpf_prog *prog,
2842	const union bpf_attr *kattr,
2843	union bpf_attr __user *uattr);
2844	int bpf_prog_test_run_sk_lookup(struct bpf_prog *prog,
2845	const union bpf_attr *kattr,
2846	union bpf_attr __user *uattr);
2847	int bpf_prog_test_run_nf(struct bpf_prog *prog,
2848	const union bpf_attr *kattr,
2849	union bpf_attr __user *uattr);
2850	bool btf_ctx_access(int off, int size, enum bpf_access_type type,
2851	const struct bpf_prog *prog,
2852	struct bpf_insn_access_aux *info);
2853
2854	static inline bool bpf_tracing_ctx_access(int off, int size,
2855	enum bpf_access_type type)
2856	{
2857	if (off < 0 || off >= sizeof(__u64) * MAX_BPF_FUNC_ARGS)
2858	return false;
2859	if (type != BPF_READ)
2860	return false;
2861	if (off % size != 0)
2862	return false;
2863	return true;
2864	}
2865
2866	static inline bool bpf_tracing_btf_ctx_access(int off, int size,
2867	enum bpf_access_type type,
2868	const struct bpf_prog *prog,
2869	struct bpf_insn_access_aux *info)
2870	{
2871	if (!bpf_tracing_ctx_access(off, size, type))
2872	return false;
2873	return btf_ctx_access(off, size, type, prog, info);
2874	}
2875
2876	int btf_struct_access(struct bpf_verifier_log *log,
2877	const struct bpf_reg_state *reg,
2878	int off, int size, enum bpf_access_type atype,
2879	u32 *next_btf_id, enum bpf_type_flag *flag, const char **field_name);
2880	bool btf_struct_ids_match(struct bpf_verifier_log *log,
2881	const struct btf *btf, u32 id, int off,
2882	const struct btf *need_btf, u32 need_type_id,
2883	bool strict);
2884
2885	int btf_distill_func_proto(struct bpf_verifier_log *log,
2886	struct btf *btf,
2887	const struct btf_type *func_proto,
2888	const char *func_name,
2889	struct btf_func_model *m);
2890
2891	struct bpf_reg_state;
2892	int btf_prepare_func_args(struct bpf_verifier_env *env, int subprog);
2893	int btf_check_type_match(struct bpf_verifier_log *log, const struct bpf_prog *prog,
2894	struct btf *btf, const struct btf_type *t);
2895	const char *btf_find_decl_tag_value(const struct btf *btf, const struct btf_type *pt,
2896	int comp_idx, const char *tag_key);
2897	int btf_find_next_decl_tag(const struct btf *btf, const struct btf_type *pt,
2898	int comp_idx, const char *tag_key, int last_id);
2899
2900	struct bpf_prog *bpf_prog_by_id(u32 id);
2901	struct bpf_link *bpf_link_by_id(u32 id);
2902
2903	const struct bpf_func_proto *bpf_base_func_proto(enum bpf_func_id func_id,
2904	const struct bpf_prog *prog);
2905	void bpf_task_storage_free(struct task_struct *task);
2906	void bpf_cgrp_storage_free(struct cgroup *cgroup);
2907	bool bpf_prog_has_kfunc_call(const struct bpf_prog *prog);
2908	const struct btf_func_model *
2909	bpf_jit_find_kfunc_model(const struct bpf_prog *prog,
2910	const struct bpf_insn *insn);
2911	int bpf_get_kfunc_addr(const struct bpf_prog *prog, u32 func_id,
2912	u16 btf_fd_idx, u8 **func_addr);
2913
2914	struct bpf_core_ctx {
2915	struct bpf_verifier_log *log;
2916	const struct btf *btf;
2917	};
2918
2919	bool btf_nested_type_is_trusted(struct bpf_verifier_log *log,
2920	const struct bpf_reg_state *reg,
2921	const char *field_name, u32 btf_id, const char *suffix);
2922
2923	bool btf_type_ids_nocast_alias(struct bpf_verifier_log *log,
2924	const struct btf *reg_btf, u32 reg_id,
2925	const struct btf *arg_btf, u32 arg_id);
2926
2927	int bpf_core_apply(struct bpf_core_ctx *ctx, const struct bpf_core_relo *relo,
2928	int relo_idx, void *insn);
2929
2930	static inline bool unprivileged_ebpf_enabled(void)
2931	{
2932	return !sysctl_unprivileged_bpf_disabled;
2933	}
2934
2935	/* Not all bpf prog type has the bpf_ctx.
2936	* For the bpf prog type that has initialized the bpf_ctx,
2937	* this function can be used to decide if a kernel function
2938	* is called by a bpf program.
2939	*/
2940	static inline bool has_current_bpf_ctx(void)
2941	{
2942	return !!current->bpf_ctx;
2943	}
2944
2945	void notrace bpf_prog_inc_misses_counter(struct bpf_prog *prog);
2946
2947	void bpf_dynptr_init(struct bpf_dynptr_kern *ptr, void *data,
2948	enum bpf_dynptr_type type, u32 offset, u32 size);
2949	void bpf_dynptr_set_null(struct bpf_dynptr_kern *ptr);
2950	void bpf_dynptr_set_rdonly(struct bpf_dynptr_kern *ptr);
2951	void bpf_prog_report_arena_violation(bool write, unsigned long addr, unsigned long fault_ip);
2952
2953	#else /* !CONFIG_BPF_SYSCALL */
2954	static inline struct bpf_prog *bpf_prog_get(u32 ufd)
2955	{
2956	return ERR_PTR(-EOPNOTSUPP);
2957	}
2958
2959	static inline struct bpf_prog *bpf_prog_get_type_dev(u32 ufd,
2960	enum bpf_prog_type type,
2961	bool attach_drv)
2962	{
2963	return ERR_PTR(-EOPNOTSUPP);
2964	}
2965
2966	static inline void bpf_prog_add(struct bpf_prog *prog, int i)
2967	{
2968	}
2969
2970	static inline void bpf_prog_sub(struct bpf_prog *prog, int i)
2971	{
2972	}
2973
2974	static inline void bpf_prog_put(struct bpf_prog *prog)
2975	{
2976	}
2977
2978	static inline void bpf_prog_inc(struct bpf_prog *prog)
2979	{
2980	}
2981
2982	static inline struct bpf_prog *__must_check
2983	bpf_prog_inc_not_zero(struct bpf_prog *prog)
2984	{
2985	return ERR_PTR(-EOPNOTSUPP);
2986	}
2987
2988	static inline void bpf_link_init(struct bpf_link *link, enum bpf_link_type type,
2989	const struct bpf_link_ops *ops,
2990	struct bpf_prog *prog, enum bpf_attach_type attach_type)
2991	{
2992	}
2993
2994	static inline void bpf_link_init_sleepable(struct bpf_link *link, enum bpf_link_type type,
2995	const struct bpf_link_ops *ops, struct bpf_prog *prog,
2996	enum bpf_attach_type attach_type, bool sleepable)
2997	{
2998	}
2999
3000	static inline int bpf_link_prime(struct bpf_link *link,
3001	struct bpf_link_primer *primer)
3002	{
3003	return -EOPNOTSUPP;
3004	}
3005
3006	static inline int bpf_link_settle(struct bpf_link_primer *primer)
3007	{
3008	return -EOPNOTSUPP;
3009	}
3010
3011	static inline void bpf_link_cleanup(struct bpf_link_primer *primer)
3012	{
3013	}
3014
3015	static inline void bpf_link_inc(struct bpf_link *link)
3016	{
3017	}
3018
3019	static inline struct bpf_link *bpf_link_inc_not_zero(struct bpf_link *link)
3020	{
3021	return NULL;
3022	}
3023
3024	static inline void bpf_link_put(struct bpf_link *link)
3025	{
3026	}
3027
3028	static inline int bpf_obj_get_user(const char __user *pathname, int flags)
3029	{
3030	return -EOPNOTSUPP;
3031	}
3032
3033	static inline bool bpf_token_capable(const struct bpf_token *token, int cap)
3034	{
3035	return capable(cap) || (cap != CAP_SYS_ADMIN && capable(CAP_SYS_ADMIN));
3036	}
3037
3038	static inline void bpf_token_inc(struct bpf_token *token)
3039	{
3040	}
3041
3042	static inline void bpf_token_put(struct bpf_token *token)
3043	{
3044	}
3045
3046	static inline struct bpf_token *bpf_token_get_from_fd(u32 ufd)
3047	{
3048	return ERR_PTR(-EOPNOTSUPP);
3049	}
3050
3051	static inline int bpf_token_get_info_by_fd(struct bpf_token *token,
3052	const union bpf_attr *attr,
3053	union bpf_attr __user *uattr)
3054	{
3055	return -EOPNOTSUPP;
3056	}
3057
3058	static inline void __dev_flush(struct list_head *flush_list)
3059	{
3060	}
3061
3062	struct xdp_frame;
3063	struct bpf_dtab_netdev;
3064	struct bpf_cpu_map_entry;
3065
3066	static inline
3067	int dev_xdp_enqueue(struct net_device *dev, struct xdp_frame *xdpf,
3068	struct net_device *dev_rx)
3069	{
3070	return 0;
3071	}
3072
3073	static inline
3074	int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_frame *xdpf,
3075	struct net_device *dev_rx)
3076	{
3077	return 0;
3078	}
3079
3080	static inline
3081	int dev_map_enqueue_multi(struct xdp_frame *xdpf, struct net_device *dev_rx,
3082	struct bpf_map *map, bool exclude_ingress)
3083	{
3084	return 0;
3085	}
3086
3087	struct sk_buff;
3088
3089	static inline int dev_map_generic_redirect(struct bpf_dtab_netdev *dst,
3090	struct sk_buff *skb,
3091	const struct bpf_prog *xdp_prog)
3092	{
3093	return 0;
3094	}
3095
3096	static inline
3097	int dev_map_redirect_multi(struct net_device *dev, struct sk_buff *skb,
3098	const struct bpf_prog *xdp_prog,
3099	struct bpf_map *map, bool exclude_ingress)
3100	{
3101	return 0;
3102	}
3103
3104	static inline void __cpu_map_flush(struct list_head *flush_list)
3105	{
3106	}
3107
3108	static inline int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu,
3109	struct xdp_frame *xdpf,
3110	struct net_device *dev_rx)
3111	{
3112	return 0;
3113	}
3114
3115	static inline int cpu_map_generic_redirect(struct bpf_cpu_map_entry *rcpu,
3116	struct sk_buff *skb)
3117	{
3118	return -EOPNOTSUPP;
3119	}
3120
3121	static inline struct bpf_prog *bpf_prog_get_type_path(const char *name,
3122	enum bpf_prog_type type)
3123	{
3124	return ERR_PTR(-EOPNOTSUPP);
3125	}
3126
3127	static inline int bpf_prog_test_run_xdp(struct bpf_prog *prog,
3128	const union bpf_attr *kattr,
3129	union bpf_attr __user *uattr)
3130	{
3131	return -ENOTSUPP;
3132	}
3133
3134	static inline int bpf_prog_test_run_skb(struct bpf_prog *prog,
3135	const union bpf_attr *kattr,
3136	union bpf_attr __user *uattr)
3137	{
3138	return -ENOTSUPP;
3139	}
3140
3141	static inline int bpf_prog_test_run_tracing(struct bpf_prog *prog,
3142	const union bpf_attr *kattr,
3143	union bpf_attr __user *uattr)
3144	{
3145	return -ENOTSUPP;
3146	}
3147
3148	static inline int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog,
3149	const union bpf_attr *kattr,
3150	union bpf_attr __user *uattr)
3151	{
3152	return -ENOTSUPP;
3153	}
3154
3155	static inline int bpf_prog_test_run_sk_lookup(struct bpf_prog *prog,
3156	const union bpf_attr *kattr,
3157	union bpf_attr __user *uattr)
3158	{
3159	return -ENOTSUPP;
3160	}
3161
3162	static inline void bpf_map_put(struct bpf_map *map)
3163	{
3164	}
3165
3166	static inline struct bpf_prog *bpf_prog_by_id(u32 id)
3167	{
3168	return ERR_PTR(-ENOTSUPP);
3169	}
3170
3171	static inline int btf_struct_access(struct bpf_verifier_log *log,
3172	const struct bpf_reg_state *reg,
3173	int off, int size, enum bpf_access_type atype,
3174	u32 *next_btf_id, enum bpf_type_flag *flag,
3175	const char **field_name)
3176	{
3177	return -EACCES;
3178	}
3179
3180	static inline const struct bpf_func_proto *
3181	bpf_base_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog)
3182	{
3183	return NULL;
3184	}
3185
3186	static inline void bpf_task_storage_free(struct task_struct *task)
3187	{
3188	}
3189
3190	static inline bool bpf_prog_has_kfunc_call(const struct bpf_prog *prog)
3191	{
3192	return false;
3193	}
3194
3195	static inline const struct btf_func_model *
3196	bpf_jit_find_kfunc_model(const struct bpf_prog *prog,
3197	const struct bpf_insn *insn)
3198	{
3199	return NULL;
3200	}
3201
3202	static inline int
3203	bpf_get_kfunc_addr(const struct bpf_prog *prog, u32 func_id,
3204	u16 btf_fd_idx, u8 **func_addr)
3205	{
3206	return -ENOTSUPP;
3207	}
3208
3209	static inline bool unprivileged_ebpf_enabled(void)
3210	{
3211	return false;
3212	}
3213
3214	static inline bool has_current_bpf_ctx(void)
3215	{
3216	return false;
3217	}
3218
3219	static inline void bpf_prog_inc_misses_counter(struct bpf_prog *prog)
3220	{
3221	}
3222
3223	static inline void bpf_cgrp_storage_free(struct cgroup *cgroup)
3224	{
3225	}
3226
3227	static inline void bpf_dynptr_init(struct bpf_dynptr_kern *ptr, void *data,
3228	enum bpf_dynptr_type type, u32 offset, u32 size)
3229	{
3230	}
3231
3232	static inline void bpf_dynptr_set_null(struct bpf_dynptr_kern *ptr)
3233	{
3234	}
3235
3236	static inline void bpf_dynptr_set_rdonly(struct bpf_dynptr_kern *ptr)
3237	{
3238	}
3239
3240	static inline void bpf_prog_report_arena_violation(bool write, unsigned long addr,
3241	unsigned long fault_ip)
3242	{
3243	}
3244	#endif /* CONFIG_BPF_SYSCALL */
3245
3246	static __always_inline int
3247	bpf_probe_read_kernel_common(void *dst, u32 size, const void *unsafe_ptr)
3248	{
3249	int ret = -EFAULT;
3250
3251	if (IS_ENABLED(CONFIG_BPF_EVENTS))
3252	ret = copy_from_kernel_nofault(dst, src: unsafe_ptr, size);
3253	if (unlikely(ret < 0))
3254	memset(dst, 0, size);
3255	return ret;
3256	}
3257
3258	void __bpf_free_used_btfs(struct btf_mod_pair *used_btfs, u32 len);
3259
3260	static inline struct bpf_prog *bpf_prog_get_type(u32 ufd,
3261	enum bpf_prog_type type)
3262	{
3263	return bpf_prog_get_type_dev(ufd, type, attach_drv: false);
3264	}
3265
3266	void __bpf_free_used_maps(struct bpf_prog_aux *aux,
3267	struct bpf_map **used_maps, u32 len);
3268
3269	bool bpf_prog_get_ok(struct bpf_prog *, enum bpf_prog_type *, bool);
3270
3271	int bpf_prog_offload_compile(struct bpf_prog *prog);
3272	void bpf_prog_dev_bound_destroy(struct bpf_prog *prog);
3273	int bpf_prog_offload_info_fill(struct bpf_prog_info *info,
3274	struct bpf_prog *prog);
3275
3276	int bpf_map_offload_info_fill(struct bpf_map_info *info, struct bpf_map *map);
3277
3278	int bpf_map_offload_lookup_elem(struct bpf_map *map, void *key, void *value);
3279	int bpf_map_offload_update_elem(struct bpf_map *map,
3280	void *key, void *value, u64 flags);
3281	int bpf_map_offload_delete_elem(struct bpf_map *map, void *key);
3282	int bpf_map_offload_get_next_key(struct bpf_map *map,
3283	void *key, void *next_key);
3284
3285	bool bpf_offload_prog_map_match(struct bpf_prog *prog, struct bpf_map *map);
3286
3287	struct bpf_offload_dev *
3288	bpf_offload_dev_create(const struct bpf_prog_offload_ops *ops, void *priv);
3289	void bpf_offload_dev_destroy(struct bpf_offload_dev *offdev);
3290	void *bpf_offload_dev_priv(struct bpf_offload_dev *offdev);
3291	int bpf_offload_dev_netdev_register(struct bpf_offload_dev *offdev,
3292	struct net_device *netdev);
3293	void bpf_offload_dev_netdev_unregister(struct bpf_offload_dev *offdev,
3294	struct net_device *netdev);
3295	bool bpf_offload_dev_match(struct bpf_prog *prog, struct net_device *netdev);
3296
3297	void unpriv_ebpf_notify(int new_state);
3298
3299	#if defined(CONFIG_NET) && defined(CONFIG_BPF_SYSCALL)
3300	int bpf_dev_bound_kfunc_check(struct bpf_verifier_log *log,
3301	struct bpf_prog_aux *prog_aux);
3302	void *bpf_dev_bound_resolve_kfunc(struct bpf_prog *prog, u32 func_id);
3303	int bpf_prog_dev_bound_init(struct bpf_prog *prog, union bpf_attr *attr);
3304	int bpf_prog_dev_bound_inherit(struct bpf_prog *new_prog, struct bpf_prog *old_prog);
3305	void bpf_dev_bound_netdev_unregister(struct net_device *dev);
3306
3307	static inline bool bpf_prog_is_dev_bound(const struct bpf_prog_aux *aux)
3308	{
3309	return aux->dev_bound;
3310	}
3311
3312	static inline bool bpf_prog_is_offloaded(const struct bpf_prog_aux *aux)
3313	{
3314	return aux->offload_requested;
3315	}
3316
3317	bool bpf_prog_dev_bound_match(const struct bpf_prog *lhs, const struct bpf_prog *rhs);
3318
3319	static inline bool bpf_map_is_offloaded(struct bpf_map *map)
3320	{
3321	return unlikely(map->ops == &bpf_map_offload_ops);
3322	}
3323
3324	struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr);
3325	void bpf_map_offload_map_free(struct bpf_map *map);
3326	u64 bpf_map_offload_map_mem_usage(const struct bpf_map *map);
3327	int bpf_prog_test_run_syscall(struct bpf_prog *prog,
3328	const union bpf_attr *kattr,
3329	union bpf_attr __user *uattr);
3330
3331	int sock_map_get_from_fd(const union bpf_attr *attr, struct bpf_prog *prog);
3332	int sock_map_prog_detach(const union bpf_attr *attr, enum bpf_prog_type ptype);
3333	int sock_map_update_elem_sys(struct bpf_map *map, void *key, void *value, u64 flags);
3334	int sock_map_bpf_prog_query(const union bpf_attr *attr,
3335	union bpf_attr __user *uattr);
3336	int sock_map_link_create(const union bpf_attr *attr, struct bpf_prog *prog);
3337
3338	void sock_map_unhash(struct sock *sk);
3339	void sock_map_destroy(struct sock *sk);
3340	void sock_map_close(struct sock *sk, long timeout);
3341	#else
3342	static inline int bpf_dev_bound_kfunc_check(struct bpf_verifier_log *log,
3343	struct bpf_prog_aux *prog_aux)
3344	{
3345	return -EOPNOTSUPP;
3346	}
3347
3348	static inline void *bpf_dev_bound_resolve_kfunc(struct bpf_prog *prog,
3349	u32 func_id)
3350	{
3351	return NULL;
3352	}
3353
3354	static inline int bpf_prog_dev_bound_init(struct bpf_prog *prog,
3355	union bpf_attr *attr)
3356	{
3357	return -EOPNOTSUPP;
3358	}
3359
3360	static inline int bpf_prog_dev_bound_inherit(struct bpf_prog *new_prog,
3361	struct bpf_prog *old_prog)
3362	{
3363	return -EOPNOTSUPP;
3364	}
3365
3366	static inline void bpf_dev_bound_netdev_unregister(struct net_device *dev)
3367	{
3368	}
3369
3370	static inline bool bpf_prog_is_dev_bound(const struct bpf_prog_aux *aux)
3371	{
3372	return false;
3373	}
3374
3375	static inline bool bpf_prog_is_offloaded(struct bpf_prog_aux *aux)
3376	{
3377	return false;
3378	}
3379
3380	static inline bool bpf_prog_dev_bound_match(const struct bpf_prog *lhs, const struct bpf_prog *rhs)
3381	{
3382	return false;
3383	}
3384
3385	static inline bool bpf_map_is_offloaded(struct bpf_map *map)
3386	{
3387	return false;
3388	}
3389
3390	static inline struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr)
3391	{
3392	return ERR_PTR(-EOPNOTSUPP);
3393	}
3394
3395	static inline void bpf_map_offload_map_free(struct bpf_map *map)
3396	{
3397	}
3398
3399	static inline u64 bpf_map_offload_map_mem_usage(const struct bpf_map *map)
3400	{
3401	return 0;
3402	}
3403
3404	static inline int bpf_prog_test_run_syscall(struct bpf_prog *prog,
3405	const union bpf_attr *kattr,
3406	union bpf_attr __user *uattr)
3407	{
3408	return -ENOTSUPP;
3409	}
3410
3411	#ifdef CONFIG_BPF_SYSCALL
3412	static inline int sock_map_get_from_fd(const union bpf_attr *attr,
3413	struct bpf_prog *prog)
3414	{
3415	return -EINVAL;
3416	}
3417
3418	static inline int sock_map_prog_detach(const union bpf_attr *attr,
3419	enum bpf_prog_type ptype)
3420	{
3421	return -EOPNOTSUPP;
3422	}
3423
3424	static inline int sock_map_update_elem_sys(struct bpf_map *map, void *key, void *value,
3425	u64 flags)
3426	{
3427	return -EOPNOTSUPP;
3428	}
3429
3430	static inline int sock_map_bpf_prog_query(const union bpf_attr *attr,
3431	union bpf_attr __user *uattr)
3432	{
3433	return -EINVAL;
3434	}
3435
3436	static inline int sock_map_link_create(const union bpf_attr *attr, struct bpf_prog *prog)
3437	{
3438	return -EOPNOTSUPP;
3439	}
3440	#endif /* CONFIG_BPF_SYSCALL */
3441	#endif /* CONFIG_NET && CONFIG_BPF_SYSCALL */
3442
3443	static __always_inline void
3444	bpf_prog_inc_misses_counters(const struct bpf_prog_array *array)
3445	{
3446	const struct bpf_prog_array_item *item;
3447	struct bpf_prog *prog;
3448
3449	if (unlikely(!array))
3450	return;
3451
3452	item = &array->items[0];
3453	while ((prog = READ_ONCE(item->prog))) {
3454	bpf_prog_inc_misses_counter(prog);
3455	item++;
3456	}
3457	}
3458
3459	#if defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL)
3460	void bpf_sk_reuseport_detach(struct sock *sk);
3461	int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map, void *key,
3462	void *value);
3463	int bpf_fd_reuseport_array_update_elem(struct bpf_map *map, void *key,
3464	void *value, u64 map_flags);
3465	#else
3466	static inline void bpf_sk_reuseport_detach(struct sock *sk)
3467	{
3468	}
3469
3470	#ifdef CONFIG_BPF_SYSCALL
3471	static inline int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map,
3472	void *key, void *value)
3473	{
3474	return -EOPNOTSUPP;
3475	}
3476
3477	static inline int bpf_fd_reuseport_array_update_elem(struct bpf_map *map,
3478	void *key, void *value,
3479	u64 map_flags)
3480	{
3481	return -EOPNOTSUPP;
3482	}
3483	#endif /* CONFIG_BPF_SYSCALL */
3484	#endif /* defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL) */
3485
3486	#if defined(CONFIG_KEYS) && defined(CONFIG_BPF_SYSCALL)
3487
3488	struct bpf_key *bpf_lookup_user_key(s32 serial, u64 flags);
3489	struct bpf_key *bpf_lookup_system_key(u64 id);
3490	void bpf_key_put(struct bpf_key *bkey);
3491	int bpf_verify_pkcs7_signature(struct bpf_dynptr *data_p,
3492	struct bpf_dynptr *sig_p,
3493	struct bpf_key *trusted_keyring);
3494
3495	#else
3496	static inline struct bpf_key *bpf_lookup_user_key(u32 serial, u64 flags)
3497	{
3498	return NULL;
3499	}
3500
3501	static inline struct bpf_key *bpf_lookup_system_key(u64 id)
3502	{
3503	return NULL;
3504	}
3505
3506	static inline void bpf_key_put(struct bpf_key *bkey)
3507	{
3508	}
3509
3510	static inline int bpf_verify_pkcs7_signature(struct bpf_dynptr *data_p,
3511	struct bpf_dynptr *sig_p,
3512	struct bpf_key *trusted_keyring)
3513	{
3514	return -EOPNOTSUPP;
3515	}
3516	#endif /* defined(CONFIG_KEYS) && defined(CONFIG_BPF_SYSCALL) */
3517
3518	/* verifier prototypes for helper functions called from eBPF programs */
3519	extern const struct bpf_func_proto bpf_map_lookup_elem_proto;
3520	extern const struct bpf_func_proto bpf_map_update_elem_proto;
3521	extern const struct bpf_func_proto bpf_map_delete_elem_proto;
3522	extern const struct bpf_func_proto bpf_map_push_elem_proto;
3523	extern const struct bpf_func_proto bpf_map_pop_elem_proto;
3524	extern const struct bpf_func_proto bpf_map_peek_elem_proto;
3525	extern const struct bpf_func_proto bpf_map_lookup_percpu_elem_proto;
3526
3527	extern const struct bpf_func_proto bpf_get_prandom_u32_proto;
3528	extern const struct bpf_func_proto bpf_get_smp_processor_id_proto;
3529	extern const struct bpf_func_proto bpf_get_numa_node_id_proto;
3530	extern const struct bpf_func_proto bpf_tail_call_proto;
3531	extern const struct bpf_func_proto bpf_ktime_get_ns_proto;
3532	extern const struct bpf_func_proto bpf_ktime_get_boot_ns_proto;
3533	extern const struct bpf_func_proto bpf_ktime_get_tai_ns_proto;
3534	extern const struct bpf_func_proto bpf_get_current_pid_tgid_proto;
3535	extern const struct bpf_func_proto bpf_get_current_uid_gid_proto;
3536	extern const struct bpf_func_proto bpf_get_current_comm_proto;
3537	extern const struct bpf_func_proto bpf_get_stackid_proto;
3538	extern const struct bpf_func_proto bpf_get_stack_proto;
3539	extern const struct bpf_func_proto bpf_get_stack_sleepable_proto;
3540	extern const struct bpf_func_proto bpf_get_task_stack_proto;
3541	extern const struct bpf_func_proto bpf_get_task_stack_sleepable_proto;
3542	extern const struct bpf_func_proto bpf_get_stackid_proto_pe;
3543	extern const struct bpf_func_proto bpf_get_stack_proto_pe;
3544	extern const struct bpf_func_proto bpf_sock_map_update_proto;
3545	extern const struct bpf_func_proto bpf_sock_hash_update_proto;
3546	extern const struct bpf_func_proto bpf_get_current_cgroup_id_proto;
3547	extern const struct bpf_func_proto bpf_get_current_ancestor_cgroup_id_proto;
3548	extern const struct bpf_func_proto bpf_get_cgroup_classid_curr_proto;
3549	extern const struct bpf_func_proto bpf_current_task_under_cgroup_proto;
3550	extern const struct bpf_func_proto bpf_msg_redirect_hash_proto;
3551	extern const struct bpf_func_proto bpf_msg_redirect_map_proto;
3552	extern const struct bpf_func_proto bpf_sk_redirect_hash_proto;
3553	extern const struct bpf_func_proto bpf_sk_redirect_map_proto;
3554	extern const struct bpf_func_proto bpf_spin_lock_proto;
3555	extern const struct bpf_func_proto bpf_spin_unlock_proto;
3556	extern const struct bpf_func_proto bpf_get_local_storage_proto;
3557	extern const struct bpf_func_proto bpf_strtol_proto;
3558	extern const struct bpf_func_proto bpf_strtoul_proto;
3559	extern const struct bpf_func_proto bpf_tcp_sock_proto;
3560	extern const struct bpf_func_proto bpf_jiffies64_proto;
3561	extern const struct bpf_func_proto bpf_get_ns_current_pid_tgid_proto;
3562	extern const struct bpf_func_proto bpf_event_output_data_proto;
3563	extern const struct bpf_func_proto bpf_ringbuf_output_proto;
3564	extern const struct bpf_func_proto bpf_ringbuf_reserve_proto;
3565	extern const struct bpf_func_proto bpf_ringbuf_submit_proto;
3566	extern const struct bpf_func_proto bpf_ringbuf_discard_proto;
3567	extern const struct bpf_func_proto bpf_ringbuf_query_proto;
3568	extern const struct bpf_func_proto bpf_ringbuf_reserve_dynptr_proto;
3569	extern const struct bpf_func_proto bpf_ringbuf_submit_dynptr_proto;
3570	extern const struct bpf_func_proto bpf_ringbuf_discard_dynptr_proto;
3571	extern const struct bpf_func_proto bpf_skc_to_tcp6_sock_proto;
3572	extern const struct bpf_func_proto bpf_skc_to_tcp_sock_proto;
3573	extern const struct bpf_func_proto bpf_skc_to_tcp_timewait_sock_proto;
3574	extern const struct bpf_func_proto bpf_skc_to_tcp_request_sock_proto;
3575	extern const struct bpf_func_proto bpf_skc_to_udp6_sock_proto;
3576	extern const struct bpf_func_proto bpf_skc_to_unix_sock_proto;
3577	extern const struct bpf_func_proto bpf_skc_to_mptcp_sock_proto;
3578	extern const struct bpf_func_proto bpf_copy_from_user_proto;
3579	extern const struct bpf_func_proto bpf_snprintf_btf_proto;
3580	extern const struct bpf_func_proto bpf_snprintf_proto;
3581	extern const struct bpf_func_proto bpf_per_cpu_ptr_proto;
3582	extern const struct bpf_func_proto bpf_this_cpu_ptr_proto;
3583	extern const struct bpf_func_proto bpf_ktime_get_coarse_ns_proto;
3584	extern const struct bpf_func_proto bpf_sock_from_file_proto;
3585	extern const struct bpf_func_proto bpf_get_socket_ptr_cookie_proto;
3586	extern const struct bpf_func_proto bpf_task_storage_get_recur_proto;
3587	extern const struct bpf_func_proto bpf_task_storage_get_proto;
3588	extern const struct bpf_func_proto bpf_task_storage_delete_recur_proto;
3589	extern const struct bpf_func_proto bpf_task_storage_delete_proto;
3590	extern const struct bpf_func_proto bpf_for_each_map_elem_proto;
3591	extern const struct bpf_func_proto bpf_btf_find_by_name_kind_proto;
3592	extern const struct bpf_func_proto bpf_sk_setsockopt_proto;
3593	extern const struct bpf_func_proto bpf_sk_getsockopt_proto;
3594	extern const struct bpf_func_proto bpf_unlocked_sk_setsockopt_proto;
3595	extern const struct bpf_func_proto bpf_unlocked_sk_getsockopt_proto;
3596	extern const struct bpf_func_proto bpf_find_vma_proto;
3597	extern const struct bpf_func_proto bpf_loop_proto;
3598	extern const struct bpf_func_proto bpf_copy_from_user_task_proto;
3599	extern const struct bpf_func_proto bpf_set_retval_proto;
3600	extern const struct bpf_func_proto bpf_get_retval_proto;
3601	extern const struct bpf_func_proto bpf_user_ringbuf_drain_proto;
3602	extern const struct bpf_func_proto bpf_cgrp_storage_get_proto;
3603	extern const struct bpf_func_proto bpf_cgrp_storage_delete_proto;
3604
3605	const struct bpf_func_proto *tracing_prog_func_proto(
3606	enum bpf_func_id func_id, const struct bpf_prog *prog);
3607
3608	/* Shared helpers among cBPF and eBPF. */
3609	void bpf_user_rnd_init_once(void);
3610	u64 bpf_user_rnd_u32(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
3611	u64 bpf_get_raw_cpu_id(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
3612
3613	#if defined(CONFIG_NET)
3614	bool bpf_sock_common_is_valid_access(int off, int size,
3615	enum bpf_access_type type,
3616	struct bpf_insn_access_aux *info);
3617	bool bpf_sock_is_valid_access(int off, int size, enum bpf_access_type type,
3618	struct bpf_insn_access_aux *info);
3619	u32 bpf_sock_convert_ctx_access(enum bpf_access_type type,
3620	const struct bpf_insn *si,
3621	struct bpf_insn *insn_buf,
3622	struct bpf_prog *prog,
3623	u32 *target_size);
3624	int bpf_dynptr_from_skb_rdonly(struct __sk_buff *skb, u64 flags,
3625	struct bpf_dynptr *ptr);
3626	#else
3627	static inline bool bpf_sock_common_is_valid_access(int off, int size,
3628	enum bpf_access_type type,
3629	struct bpf_insn_access_aux *info)
3630	{
3631	return false;
3632	}
3633	static inline bool bpf_sock_is_valid_access(int off, int size,
3634	enum bpf_access_type type,
3635	struct bpf_insn_access_aux *info)
3636	{
3637	return false;
3638	}
3639	static inline u32 bpf_sock_convert_ctx_access(enum bpf_access_type type,
3640	const struct bpf_insn *si,
3641	struct bpf_insn *insn_buf,
3642	struct bpf_prog *prog,
3643	u32 *target_size)
3644	{
3645	return 0;
3646	}
3647	static inline int bpf_dynptr_from_skb_rdonly(struct __sk_buff *skb, u64 flags,
3648	struct bpf_dynptr *ptr)
3649	{
3650	return -EOPNOTSUPP;
3651	}
3652	#endif
3653
3654	#ifdef CONFIG_INET
3655	struct sk_reuseport_kern {
3656	struct sk_buff *skb;
3657	struct sock *sk;
3658	struct sock *selected_sk;
3659	struct sock *migrating_sk;
3660	void *data_end;
3661	u32 hash;
3662	u32 reuseport_id;
3663	bool bind_inany;
3664	};
3665	bool bpf_tcp_sock_is_valid_access(int off, int size, enum bpf_access_type type,
3666	struct bpf_insn_access_aux *info);
3667
3668	u32 bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type,
3669	const struct bpf_insn *si,
3670	struct bpf_insn *insn_buf,
3671	struct bpf_prog *prog,
3672	u32 *target_size);
3673
3674	bool bpf_xdp_sock_is_valid_access(int off, int size, enum bpf_access_type type,
3675	struct bpf_insn_access_aux *info);
3676
3677	u32 bpf_xdp_sock_convert_ctx_access(enum bpf_access_type type,
3678	const struct bpf_insn *si,
3679	struct bpf_insn *insn_buf,
3680	struct bpf_prog *prog,
3681	u32 *target_size);
3682	#else
3683	static inline bool bpf_tcp_sock_is_valid_access(int off, int size,
3684	enum bpf_access_type type,
3685	struct bpf_insn_access_aux *info)
3686	{
3687	return false;
3688	}
3689
3690	static inline u32 bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type,
3691	const struct bpf_insn *si,
3692	struct bpf_insn *insn_buf,
3693	struct bpf_prog *prog,
3694	u32 *target_size)
3695	{
3696	return 0;
3697	}
3698	static inline bool bpf_xdp_sock_is_valid_access(int off, int size,
3699	enum bpf_access_type type,
3700	struct bpf_insn_access_aux *info)
3701	{
3702	return false;
3703	}
3704
3705	static inline u32 bpf_xdp_sock_convert_ctx_access(enum bpf_access_type type,
3706	const struct bpf_insn *si,
3707	struct bpf_insn *insn_buf,
3708	struct bpf_prog *prog,
3709	u32 *target_size)
3710	{
3711	return 0;
3712	}
3713	#endif /* CONFIG_INET */
3714
3715	enum bpf_text_poke_type {
3716	BPF_MOD_NOP,
3717	BPF_MOD_CALL,
3718	BPF_MOD_JUMP,
3719	};
3720
3721	int bpf_arch_text_poke(void *ip, enum bpf_text_poke_type old_t,
3722	enum bpf_text_poke_type new_t, void *old_addr,
3723	void *new_addr);
3724
3725	void bpf_arch_poke_desc_update(struct bpf_jit_poke_descriptor *poke,
3726	struct bpf_prog *new, struct bpf_prog *old);
3727
3728	void *bpf_arch_text_copy(void *dst, void *src, size_t len);
3729	int bpf_arch_text_invalidate(void *dst, size_t len);
3730
3731	struct btf_id_set;
3732	bool btf_id_set_contains(const struct btf_id_set *set, u32 id);
3733
3734	#define MAX_BPRINTF_VARARGS 12
3735	#define MAX_BPRINTF_BUF 1024
3736
3737	/* Per-cpu temp buffers used by printf-like helpers to store the bprintf binary
3738	* arguments representation.
3739	*/
3740	#define MAX_BPRINTF_BIN_ARGS 512
3741
3742	struct bpf_bprintf_buffers {
3743	char bin_args[MAX_BPRINTF_BIN_ARGS];
3744	char buf[MAX_BPRINTF_BUF];
3745	};
3746
3747	struct bpf_bprintf_data {
3748	u32 *bin_args;
3749	char *buf;
3750	bool get_bin_args;
3751	bool get_buf;
3752	};
3753
3754	int bpf_bprintf_prepare(const char *fmt, u32 fmt_size, const u64 *raw_args,
3755	u32 num_args, struct bpf_bprintf_data *data);
3756	void bpf_bprintf_cleanup(struct bpf_bprintf_data *data);
3757	int bpf_try_get_buffers(struct bpf_bprintf_buffers **bufs);
3758	void bpf_put_buffers(void);
3759
3760	void bpf_prog_stream_init(struct bpf_prog *prog);
3761	void bpf_prog_stream_free(struct bpf_prog *prog);
3762	int bpf_prog_stream_read(struct bpf_prog *prog, enum bpf_stream_id stream_id, void __user *buf, int len);
3763	void bpf_stream_stage_init(struct bpf_stream_stage *ss);
3764	void bpf_stream_stage_free(struct bpf_stream_stage *ss);
3765	__printf(2, 3)
3766	int bpf_stream_stage_printk(struct bpf_stream_stage *ss, const char *fmt, ...);
3767	int bpf_stream_stage_commit(struct bpf_stream_stage *ss, struct bpf_prog *prog,
3768	enum bpf_stream_id stream_id);
3769	int bpf_stream_stage_dump_stack(struct bpf_stream_stage *ss);
3770
3771	#define bpf_stream_printk(ss, ...) bpf_stream_stage_printk(&ss, __VA_ARGS__)
3772	#define bpf_stream_dump_stack(ss) bpf_stream_stage_dump_stack(&ss)
3773
3774	#define bpf_stream_stage(ss, prog, stream_id, expr) \
3775	({ \
3776	bpf_stream_stage_init(&ss); \
3777	(expr); \
3778	bpf_stream_stage_commit(&ss, prog, stream_id); \
3779	bpf_stream_stage_free(&ss); \
3780	})
3781
3782	#ifdef CONFIG_BPF_LSM
3783	void bpf_cgroup_atype_get(u32 attach_btf_id, int cgroup_atype);
3784	void bpf_cgroup_atype_put(int cgroup_atype);
3785	#else
3786	static inline void bpf_cgroup_atype_get(u32 attach_btf_id, int cgroup_atype) {}
3787	static inline void bpf_cgroup_atype_put(int cgroup_atype) {}
3788	#endif /* CONFIG_BPF_LSM */
3789
3790	struct key;
3791
3792	#ifdef CONFIG_KEYS
3793	struct bpf_key {
3794	struct key *key;
3795	bool has_ref;
3796	};
3797	#endif /* CONFIG_KEYS */
3798
3799	static inline bool type_is_alloc(u32 type)
3800	{
3801	return type & MEM_ALLOC;
3802	}
3803
3804	static inline gfp_t bpf_memcg_flags(gfp_t flags)
3805	{
3806	if (memcg_bpf_enabled())
3807	return flags | __GFP_ACCOUNT;
3808	return flags;
3809	}
3810
3811	static inline bool bpf_is_subprog(const struct bpf_prog *prog)
3812	{
3813	return prog->aux->func_idx != 0;
3814	}
3815
3816	int bpf_prog_get_file_line(struct bpf_prog *prog, unsigned long ip, const char **filep,
3817	const char **linep, int *nump);
3818	struct bpf_prog *bpf_prog_find_from_stack(void);
3819
3820	int bpf_insn_array_init(struct bpf_map *map, const struct bpf_prog *prog);
3821	int bpf_insn_array_ready(struct bpf_map *map);
3822	void bpf_insn_array_release(struct bpf_map *map);
3823	void bpf_insn_array_adjust(struct bpf_map *map, u32 off, u32 len);
3824	void bpf_insn_array_adjust_after_remove(struct bpf_map *map, u32 off, u32 len);
3825
3826	#ifdef CONFIG_BPF_SYSCALL
3827	void bpf_prog_update_insn_ptrs(struct bpf_prog *prog, u32 *offsets, void *image);
3828	#else
3829	static inline void
3830	bpf_prog_update_insn_ptrs(struct bpf_prog *prog, u32 *offsets, void *image)
3831	{
3832	}
3833	#endif
3834
3835	static inline int bpf_map_check_op_flags(struct bpf_map *map, u64 flags, u64 allowed_flags)
3836	{
3837	if (flags & ~allowed_flags)
3838	return -EINVAL;
3839
3840	if ((flags & BPF_F_LOCK) && !btf_record_has_field(rec: map->record, type: BPF_SPIN_LOCK))
3841	return -EINVAL;
3842
3843	return 0;
3844	}
3845
3846	#endif /* _LINUX_BPF_H */
3847