1	/* SPDX-License-Identifier: GPL-2.0-only */
2	/* Copyright (c) 2011-2014 PLUMgrid, http://plumgrid.com
3	*/
4	#ifndef _LINUX_BPF_H
5	#define _LINUX_BPF_H 1
6
7	#include <uapi/linux/bpf.h>
8	#include <uapi/linux/filter.h>
9
10	#include <linux/workqueue.h>
11	#include <linux/file.h>
12	#include <linux/percpu.h>
13	#include <linux/err.h>
14	#include <linux/rbtree_latch.h>
15	#include <linux/numa.h>
16	#include <linux/mm_types.h>
17	#include <linux/wait.h>
18	#include <linux/refcount.h>
19	#include <linux/mutex.h>
20	#include <linux/module.h>
21	#include <linux/kallsyms.h>
22	#include <linux/capability.h>
23	#include <linux/sched/mm.h>
24	#include <linux/slab.h>
25	#include <linux/percpu-refcount.h>
26	#include <linux/stddef.h>
27	#include <linux/bpfptr.h>
28	#include <linux/btf.h>
29	#include <linux/rcupdate_trace.h>
30
31	struct bpf_verifier_env;
32	struct bpf_verifier_log;
33	struct perf_event;
34	struct bpf_prog;
35	struct bpf_prog_aux;
36	struct bpf_map;
37	struct sock;
38	struct seq_file;
39	struct btf;
40	struct btf_type;
41	struct exception_table_entry;
42	struct seq_operations;
43	struct bpf_iter_aux_info;
44	struct bpf_local_storage;
45	struct bpf_local_storage_map;
46	struct kobject;
47	struct mem_cgroup;
48	struct module;
49	struct bpf_func_state;
50	struct ftrace_ops;
51
52	extern struct idr btf_idr;
53	extern spinlock_t btf_idr_lock;
54	extern struct kobject *btf_kobj;
55
56	typedef u64 (*bpf_callback_t)(u64, u64, u64, u64, u64);
57	typedef int (*bpf_iter_init_seq_priv_t)(void *private_data,
58	struct bpf_iter_aux_info *aux);
59	typedef void (*bpf_iter_fini_seq_priv_t)(void *private_data);
60	typedef unsigned int (*bpf_func_t)(const void *,
61	const struct bpf_insn *);
62	struct bpf_iter_seq_info {
63	const struct seq_operations *seq_ops;
64	bpf_iter_init_seq_priv_t init_seq_private;
65	bpf_iter_fini_seq_priv_t fini_seq_private;
66	u32 seq_priv_size;
67	};
68
69	/* map is generic key/value storage optionally accessible by eBPF programs */
70	struct bpf_map_ops {
71	/* funcs callable from userspace (via syscall) */
72	int (*map_alloc_check)(union bpf_attr *attr);
73	struct bpf_map *(*map_alloc)(union bpf_attr *attr);
74	void (*map_release)(struct bpf_map *map, struct file *map_file);
75	void (*map_free)(struct bpf_map *map);
76	int (*map_get_next_key)(struct bpf_map *map, void *key, void *next_key);
77	void (*map_release_uref)(struct bpf_map *map);
78	void *(*map_lookup_elem_sys_only)(struct bpf_map *map, void *key);
79	int (*map_lookup_batch)(struct bpf_map *map, const union bpf_attr *attr,
80	union bpf_attr __user *uattr);
81	int (*map_lookup_and_delete_elem)(struct bpf_map *map, void *key,
82	void *value, u64 flags);
83	int (*map_lookup_and_delete_batch)(struct bpf_map *map,
84	const union bpf_attr *attr,
85	union bpf_attr __user *uattr);
86	int (*map_update_batch)(struct bpf_map *map, const union bpf_attr *attr,
87	union bpf_attr __user *uattr);
88	int (*map_delete_batch)(struct bpf_map *map, const union bpf_attr *attr,
89	union bpf_attr __user *uattr);
90
91	/* funcs callable from userspace and from eBPF programs */
92	void *(*map_lookup_elem)(struct bpf_map *map, void *key);
93	int (*map_update_elem)(struct bpf_map *map, void *key, void *value, u64 flags);
94	int (*map_delete_elem)(struct bpf_map *map, void *key);
95	int (*map_push_elem)(struct bpf_map *map, void *value, u64 flags);
96	int (*map_pop_elem)(struct bpf_map *map, void *value);
97	int (*map_peek_elem)(struct bpf_map *map, void *value);
98	void *(*map_lookup_percpu_elem)(struct bpf_map *map, void *key, u32 cpu);
99
100	/* funcs called by prog_array and perf_event_array map */
101	void *(*map_fd_get_ptr)(struct bpf_map *map, struct file *map_file,
102	int fd);
103	void (*map_fd_put_ptr)(void *ptr);
104	int (*map_gen_lookup)(struct bpf_map *map, struct bpf_insn *insn_buf);
105	u32 (*map_fd_sys_lookup_elem)(void *ptr);
106	void (*map_seq_show_elem)(struct bpf_map *map, void *key,
107	struct seq_file *m);
108	int (*map_check_btf)(const struct bpf_map *map,
109	const struct btf *btf,
110	const struct btf_type *key_type,
111	const struct btf_type *value_type);
112
113	/* Prog poke tracking helpers. */
114	int (*map_poke_track)(struct bpf_map *map, struct bpf_prog_aux *aux);
115	void (*map_poke_untrack)(struct bpf_map *map, struct bpf_prog_aux *aux);
116	void (*map_poke_run)(struct bpf_map *map, u32 key, struct bpf_prog *old,
117	struct bpf_prog *new);
118
119	/* Direct value access helpers. */
120	int (*map_direct_value_addr)(const struct bpf_map *map,
121	u64 *imm, u32 off);
122	int (*map_direct_value_meta)(const struct bpf_map *map,
123	u64 imm, u32 *off);
124	int (*map_mmap)(struct bpf_map *map, struct vm_area_struct *vma);
125	__poll_t (*map_poll)(struct bpf_map *map, struct file *filp,
126	struct poll_table_struct *pts);
127
128	/* Functions called by bpf_local_storage maps */
129	int (*map_local_storage_charge)(struct bpf_local_storage_map *smap,
130	void *owner, u32 size);
131	void (*map_local_storage_uncharge)(struct bpf_local_storage_map *smap,
132	void *owner, u32 size);
133	struct bpf_local_storage __rcu ** (*map_owner_storage_ptr)(void *owner);
134
135	/* Misc helpers.*/
136	int (*map_redirect)(struct bpf_map *map, u32 ifindex, u64 flags);
137
138	/* map_meta_equal must be implemented for maps that can be
139	* used as an inner map. It is a runtime check to ensure
140	* an inner map can be inserted to an outer map.
141	*
142	* Some properties of the inner map has been used during the
143	* verification time. When inserting an inner map at the runtime,
144	* map_meta_equal has to ensure the inserting map has the same
145	* properties that the verifier has used earlier.
146	*/
147	bool (*map_meta_equal)(const struct bpf_map *meta0,
148	const struct bpf_map *meta1);
149
150
151	int (*map_set_for_each_callback_args)(struct bpf_verifier_env *env,
152	struct bpf_func_state *caller,
153	struct bpf_func_state *callee);
154	int (*map_for_each_callback)(struct bpf_map *map,
155	bpf_callback_t callback_fn,
156	void *callback_ctx, u64 flags);
157
158	/* BTF id of struct allocated by map_alloc */
159	int *map_btf_id;
160
161	/* bpf_iter info used to open a seq_file */
162	const struct bpf_iter_seq_info *iter_seq_info;
163	};
164
165	enum {
166	/* Support at most 8 pointers in a BPF map value */
167	BPF_MAP_VALUE_OFF_MAX = 8,
168	BPF_MAP_OFF_ARR_MAX = BPF_MAP_VALUE_OFF_MAX +
169	1 + /* for bpf_spin_lock */
170	1, /* for bpf_timer */
171	};
172
173	enum bpf_kptr_type {
174	BPF_KPTR_UNREF,
175	BPF_KPTR_REF,
176	};
177
178	struct bpf_map_value_off_desc {
179	u32 offset;
180	enum bpf_kptr_type type;
181	struct {
182	struct btf *btf;
183	struct module *module;
184	btf_dtor_kfunc_t dtor;
185	u32 btf_id;
186	} kptr;
187	};
188
189	struct bpf_map_value_off {
190	u32 nr_off;
191	struct bpf_map_value_off_desc off[];
192	};
193
194	struct bpf_map_off_arr {
195	u32 cnt;
196	u32 field_off[BPF_MAP_OFF_ARR_MAX];
197	u8 field_sz[BPF_MAP_OFF_ARR_MAX];
198	};
199
200	struct bpf_map {
201	/* The first two cachelines with read-mostly members of which some
202	* are also accessed in fast-path (e.g. ops, max_entries).
203	*/
204	const struct bpf_map_ops *ops ____cacheline_aligned;
205	struct bpf_map *inner_map_meta;
206	#ifdef CONFIG_SECURITY
207	void *security;
208	#endif
209	enum bpf_map_type map_type;
210	u32 key_size;
211	u32 value_size;
212	u32 max_entries;
213	u64 map_extra; /* any per-map-type extra fields */
214	u32 map_flags;
215	int spin_lock_off; /* >=0 valid offset, <0 error */
216	struct bpf_map_value_off *kptr_off_tab;
217	int timer_off; /* >=0 valid offset, <0 error */
218	u32 id;
219	int numa_node;
220	u32 btf_key_type_id;
221	u32 btf_value_type_id;
222	u32 btf_vmlinux_value_type_id;
223	struct btf *btf;
224	#ifdef CONFIG_MEMCG_KMEM
225	struct obj_cgroup *objcg;
226	#endif
227	char name[BPF_OBJ_NAME_LEN];
228	struct bpf_map_off_arr *off_arr;
229	/* The 3rd and 4th cacheline with misc members to avoid false sharing
230	* particularly with refcounting.
231	*/
232	atomic64_t refcnt ____cacheline_aligned;
233	atomic64_t usercnt;
234	struct work_struct work;
235	struct mutex freeze_mutex;
236	atomic64_t writecnt;
237	/* 'Ownership' of program-containing map is claimed by the first program
238	* that is going to use this map or by the first program which FD is
239	* stored in the map to make sure that all callers and callees have the
240	* same prog type, JITed flag and xdp_has_frags flag.
241	*/
242	struct {
243	spinlock_t lock;
244	enum bpf_prog_type type;
245	bool jited;
246	bool xdp_has_frags;
247	} owner;
248	bool bypass_spec_v1;
249	bool frozen; /* write-once; write-protected by freeze_mutex */
250	};
251
252	static inline bool map_value_has_spin_lock(const struct bpf_map *map)
253	{
254	return map->spin_lock_off >= 0;
255	}
256
257	static inline bool map_value_has_timer(const struct bpf_map *map)
258	{
259	return map->timer_off >= 0;
260	}
261
262	static inline bool map_value_has_kptrs(const struct bpf_map *map)
263	{
264	return !IS_ERR_OR_NULL(map->kptr_off_tab);
265	}
266
267	static inline void check_and_init_map_value(struct bpf_map *map, void *dst)
268	{
269	if (unlikely(map_value_has_spin_lock(map)))
270	memset(dst + map->spin_lock_off, 0, sizeof(struct bpf_spin_lock));
271	if (unlikely(map_value_has_timer(map)))
272	memset(dst + map->timer_off, 0, sizeof(struct bpf_timer));
273	if (unlikely(map_value_has_kptrs(map))) {
274	struct bpf_map_value_off *tab = map->kptr_off_tab;
275	int i;
276
277	for (i = 0; i < tab->nr_off; i++)
278	*(u64 *)(dst + tab->off[i].offset) = 0;
279	}
280	}
281
282	/* copy everything but bpf_spin_lock and bpf_timer. There could be one of each. */
283	static inline void copy_map_value(struct bpf_map *map, void *dst, void *src)
284	{
285	u32 curr_off = 0;
286	int i;
287
288	if (likely(!map->off_arr)) {
289	memcpy(dst, src, map->value_size);
290	return;
291	}
292
293	for (i = 0; i < map->off_arr->cnt; i++) {
294	u32 next_off = map->off_arr->field_off[i];
295
296	memcpy(dst + curr_off, src + curr_off, next_off - curr_off);
297	curr_off += map->off_arr->field_sz[i];
298	}
299	memcpy(dst + curr_off, src + curr_off, map->value_size - curr_off);
300	}
301	void copy_map_value_locked(struct bpf_map *map, void *dst, void *src,
302	bool lock_src);
303	void bpf_timer_cancel_and_free(void *timer);
304	int bpf_obj_name_cpy(char *dst, const char *src, unsigned int size);
305
306	struct bpf_offload_dev;
307	struct bpf_offloaded_map;
308
309	struct bpf_map_dev_ops {
310	int (*map_get_next_key)(struct bpf_offloaded_map *map,
311	void *key, void *next_key);
312	int (*map_lookup_elem)(struct bpf_offloaded_map *map,
313	void *key, void *value);
314	int (*map_update_elem)(struct bpf_offloaded_map *map,
315	void *key, void *value, u64 flags);
316	int (*map_delete_elem)(struct bpf_offloaded_map *map, void *key);
317	};
318
319	struct bpf_offloaded_map {
320	struct bpf_map map;
321	struct net_device *netdev;
322	const struct bpf_map_dev_ops *dev_ops;
323	void *dev_priv;
324	struct list_head offloads;
325	};
326
327	static inline struct bpf_offloaded_map *map_to_offmap(struct bpf_map *map)
328	{
329	return container_of(map, struct bpf_offloaded_map, map);
330	}
331
332	static inline bool bpf_map_offload_neutral(const struct bpf_map *map)
333	{
334	return map->map_type == BPF_MAP_TYPE_PERF_EVENT_ARRAY;
335	}
336
337	static inline bool bpf_map_support_seq_show(const struct bpf_map *map)
338	{
339	return (map->btf_value_type_id || map->btf_vmlinux_value_type_id) &&
340	map->ops->map_seq_show_elem;
341	}
342
343	int map_check_no_btf(const struct bpf_map *map,
344	const struct btf *btf,
345	const struct btf_type *key_type,
346	const struct btf_type *value_type);
347
348	bool bpf_map_meta_equal(const struct bpf_map *meta0,
349	const struct bpf_map *meta1);
350
351	extern const struct bpf_map_ops bpf_map_offload_ops;
352
353	/* bpf_type_flag contains a set of flags that are applicable to the values of
354	* arg_type, ret_type and reg_type. For example, a pointer value may be null,
355	* or a memory is read-only. We classify types into two categories: base types
356	* and extended types. Extended types are base types combined with a type flag.
357	*
358	* Currently there are no more than 32 base types in arg_type, ret_type and
359	* reg_types.
360	*/
361	#define BPF_BASE_TYPE_BITS 8
362
363	enum bpf_type_flag {
364	/* PTR may be NULL. */
365	PTR_MAYBE_NULL = BIT(0 + BPF_BASE_TYPE_BITS),
366
367	/* MEM is read-only. When applied on bpf_arg, it indicates the arg is
368	* compatible with both mutable and immutable memory.
369	*/
370	MEM_RDONLY = BIT(1 + BPF_BASE_TYPE_BITS),
371
372	/* MEM was "allocated" from a different helper, and cannot be mixed
373	* with regular non-MEM_ALLOC'ed MEM types.
374	*/
375	MEM_ALLOC = BIT(2 + BPF_BASE_TYPE_BITS),
376
377	/* MEM is in user address space. */
378	MEM_USER = BIT(3 + BPF_BASE_TYPE_BITS),
379
380	/* MEM is a percpu memory. MEM_PERCPU tags PTR_TO_BTF_ID. When tagged
381	* with MEM_PERCPU, PTR_TO_BTF_ID _cannot_ be directly accessed. In
382	* order to drop this tag, it must be passed into bpf_per_cpu_ptr()
383	* or bpf_this_cpu_ptr(), which will return the pointer corresponding
384	* to the specified cpu.
385	*/
386	MEM_PERCPU = BIT(4 + BPF_BASE_TYPE_BITS),
387
388	/* Indicates that the argument will be released. */
389	OBJ_RELEASE = BIT(5 + BPF_BASE_TYPE_BITS),
390
391	/* PTR is not trusted. This is only used with PTR_TO_BTF_ID, to mark
392	* unreferenced and referenced kptr loaded from map value using a load
393	* instruction, so that they can only be dereferenced but not escape the
394	* BPF program into the kernel (i.e. cannot be passed as arguments to
395	* kfunc or bpf helpers).
396	*/
397	PTR_UNTRUSTED = BIT(6 + BPF_BASE_TYPE_BITS),
398
399	MEM_UNINIT = BIT(7 + BPF_BASE_TYPE_BITS),
400
401	/* DYNPTR points to memory local to the bpf program. */
402	DYNPTR_TYPE_LOCAL = BIT(8 + BPF_BASE_TYPE_BITS),
403
404	/* DYNPTR points to a ringbuf record. */
405	DYNPTR_TYPE_RINGBUF = BIT(9 + BPF_BASE_TYPE_BITS),
406
407	/* Size is known at compile time. */
408	MEM_FIXED_SIZE = BIT(10 + BPF_BASE_TYPE_BITS),
409
410	__BPF_TYPE_FLAG_MAX,
411	__BPF_TYPE_LAST_FLAG = __BPF_TYPE_FLAG_MAX - 1,
412	};
413
414	#define DYNPTR_TYPE_FLAG_MASK (DYNPTR_TYPE_LOCAL | DYNPTR_TYPE_RINGBUF)
415
416	/* Max number of base types. */
417	#define BPF_BASE_TYPE_LIMIT (1UL << BPF_BASE_TYPE_BITS)
418
419	/* Max number of all types. */
420	#define BPF_TYPE_LIMIT (__BPF_TYPE_LAST_FLAG | (__BPF_TYPE_LAST_FLAG - 1))
421
422	/* function argument constraints */
423	enum bpf_arg_type {
424	ARG_DONTCARE = 0, /* unused argument in helper function */
425
426	/* the following constraints used to prototype
427	* bpf_map_lookup/update/delete_elem() functions
428	*/
429	ARG_CONST_MAP_PTR, /* const argument used as pointer to bpf_map */
430	ARG_PTR_TO_MAP_KEY, /* pointer to stack used as map key */
431	ARG_PTR_TO_MAP_VALUE, /* pointer to stack used as map value */
432
433	/* Used to prototype bpf_memcmp() and other functions that access data
434	* on eBPF program stack
435	*/
436	ARG_PTR_TO_MEM, /* pointer to valid memory (stack, packet, map value) */
437
438	ARG_CONST_SIZE, /* number of bytes accessed from memory */
439	ARG_CONST_SIZE_OR_ZERO, /* number of bytes accessed from memory or 0 */
440
441	ARG_PTR_TO_CTX, /* pointer to context */
442	ARG_ANYTHING, /* any (initialized) argument is ok */
443	ARG_PTR_TO_SPIN_LOCK, /* pointer to bpf_spin_lock */
444	ARG_PTR_TO_SOCK_COMMON, /* pointer to sock_common */
445	ARG_PTR_TO_INT, /* pointer to int */
446	ARG_PTR_TO_LONG, /* pointer to long */
447	ARG_PTR_TO_SOCKET, /* pointer to bpf_sock (fullsock) */
448	ARG_PTR_TO_BTF_ID, /* pointer to in-kernel struct */
449	ARG_PTR_TO_ALLOC_MEM, /* pointer to dynamically allocated memory */
450	ARG_CONST_ALLOC_SIZE_OR_ZERO, /* number of allocated bytes requested */
451	ARG_PTR_TO_BTF_ID_SOCK_COMMON, /* pointer to in-kernel sock_common or bpf-mirrored bpf_sock */
452	ARG_PTR_TO_PERCPU_BTF_ID, /* pointer to in-kernel percpu type */
453	ARG_PTR_TO_FUNC, /* pointer to a bpf program function */
454	ARG_PTR_TO_STACK, /* pointer to stack */
455	ARG_PTR_TO_CONST_STR, /* pointer to a null terminated read-only string */
456	ARG_PTR_TO_TIMER, /* pointer to bpf_timer */
457	ARG_PTR_TO_KPTR, /* pointer to referenced kptr */
458	ARG_PTR_TO_DYNPTR, /* pointer to bpf_dynptr. See bpf_type_flag for dynptr type */
459	__BPF_ARG_TYPE_MAX,
460
461	/* Extended arg_types. */
462	ARG_PTR_TO_MAP_VALUE_OR_NULL = PTR_MAYBE_NULL | ARG_PTR_TO_MAP_VALUE,
463	ARG_PTR_TO_MEM_OR_NULL = PTR_MAYBE_NULL | ARG_PTR_TO_MEM,
464	ARG_PTR_TO_CTX_OR_NULL = PTR_MAYBE_NULL | ARG_PTR_TO_CTX,
465	ARG_PTR_TO_SOCKET_OR_NULL = PTR_MAYBE_NULL | ARG_PTR_TO_SOCKET,
466	ARG_PTR_TO_ALLOC_MEM_OR_NULL = PTR_MAYBE_NULL | ARG_PTR_TO_ALLOC_MEM,
467	ARG_PTR_TO_STACK_OR_NULL = PTR_MAYBE_NULL | ARG_PTR_TO_STACK,
468	ARG_PTR_TO_BTF_ID_OR_NULL = PTR_MAYBE_NULL | ARG_PTR_TO_BTF_ID,
469	/* pointer to memory does not need to be initialized, helper function must fill
470	* all bytes or clear them in error case.
471	*/
472	ARG_PTR_TO_UNINIT_MEM = MEM_UNINIT | ARG_PTR_TO_MEM,
473	/* Pointer to valid memory of size known at compile time. */
474	ARG_PTR_TO_FIXED_SIZE_MEM = MEM_FIXED_SIZE | ARG_PTR_TO_MEM,
475
476	/* This must be the last entry. Its purpose is to ensure the enum is
477	* wide enough to hold the higher bits reserved for bpf_type_flag.
478	*/
479	__BPF_ARG_TYPE_LIMIT = BPF_TYPE_LIMIT,
480	};
481	static_assert(__BPF_ARG_TYPE_MAX <= BPF_BASE_TYPE_LIMIT);
482
483	/* type of values returned from helper functions */
484	enum bpf_return_type {
485	RET_INTEGER, /* function returns integer */
486	RET_VOID, /* function doesn't return anything */
487	RET_PTR_TO_MAP_VALUE, /* returns a pointer to map elem value */
488	RET_PTR_TO_SOCKET, /* returns a pointer to a socket */
489	RET_PTR_TO_TCP_SOCK, /* returns a pointer to a tcp_sock */
490	RET_PTR_TO_SOCK_COMMON, /* returns a pointer to a sock_common */
491	RET_PTR_TO_ALLOC_MEM, /* returns a pointer to dynamically allocated memory */
492	RET_PTR_TO_MEM_OR_BTF_ID, /* returns a pointer to a valid memory or a btf_id */
493	RET_PTR_TO_BTF_ID, /* returns a pointer to a btf_id */
494	__BPF_RET_TYPE_MAX,
495
496	/* Extended ret_types. */
497	RET_PTR_TO_MAP_VALUE_OR_NULL = PTR_MAYBE_NULL | RET_PTR_TO_MAP_VALUE,
498	RET_PTR_TO_SOCKET_OR_NULL = PTR_MAYBE_NULL | RET_PTR_TO_SOCKET,
499	RET_PTR_TO_TCP_SOCK_OR_NULL = PTR_MAYBE_NULL | RET_PTR_TO_TCP_SOCK,
500	RET_PTR_TO_SOCK_COMMON_OR_NULL = PTR_MAYBE_NULL | RET_PTR_TO_SOCK_COMMON,
501	RET_PTR_TO_ALLOC_MEM_OR_NULL = PTR_MAYBE_NULL | MEM_ALLOC | RET_PTR_TO_ALLOC_MEM,
502	RET_PTR_TO_DYNPTR_MEM_OR_NULL = PTR_MAYBE_NULL | RET_PTR_TO_ALLOC_MEM,
503	RET_PTR_TO_BTF_ID_OR_NULL = PTR_MAYBE_NULL | RET_PTR_TO_BTF_ID,
504
505	/* This must be the last entry. Its purpose is to ensure the enum is
506	* wide enough to hold the higher bits reserved for bpf_type_flag.
507	*/
508	__BPF_RET_TYPE_LIMIT = BPF_TYPE_LIMIT,
509	};
510	static_assert(__BPF_RET_TYPE_MAX <= BPF_BASE_TYPE_LIMIT);
511
512	/* eBPF function prototype used by verifier to allow BPF_CALLs from eBPF programs
513	* to in-kernel helper functions and for adjusting imm32 field in BPF_CALL
514	* instructions after verifying
515	*/
516	struct bpf_func_proto {
517	u64 (*func)(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
518	bool gpl_only;
519	bool pkt_access;
520	enum bpf_return_type ret_type;
521	union {
522	struct {
523	enum bpf_arg_type arg1_type;
524	enum bpf_arg_type arg2_type;
525	enum bpf_arg_type arg3_type;
526	enum bpf_arg_type arg4_type;
527	enum bpf_arg_type arg5_type;
528	};
529	enum bpf_arg_type arg_type[5];
530	};
531	union {
532	struct {
533	u32 *arg1_btf_id;
534	u32 *arg2_btf_id;
535	u32 *arg3_btf_id;
536	u32 *arg4_btf_id;
537	u32 *arg5_btf_id;
538	};
539	u32 *arg_btf_id[5];
540	struct {
541	size_t arg1_size;
542	size_t arg2_size;
543	size_t arg3_size;
544	size_t arg4_size;
545	size_t arg5_size;
546	};
547	size_t arg_size[5];
548	};
549	int *ret_btf_id; /* return value btf_id */
550	bool (*allowed)(const struct bpf_prog *prog);
551	};
552
553	/* bpf_context is intentionally undefined structure. Pointer to bpf_context is
554	* the first argument to eBPF programs.
555	* For socket filters: 'struct bpf_context *' == 'struct sk_buff *'
556	*/
557	struct bpf_context;
558
559	enum bpf_access_type {
560	BPF_READ = 1,
561	BPF_WRITE = 2
562	};
563
564	/* types of values stored in eBPF registers */
565	/* Pointer types represent:
566	* pointer
567	* pointer + imm
568	* pointer + (u16) var
569	* pointer + (u16) var + imm
570	* if (range > 0) then [ptr, ptr + range - off) is safe to access
571	* if (id > 0) means that some 'var' was added
572	* if (off > 0) means that 'imm' was added
573	*/
574	enum bpf_reg_type {
575	NOT_INIT = 0, /* nothing was written into register */
576	SCALAR_VALUE, /* reg doesn't contain a valid pointer */
577	PTR_TO_CTX, /* reg points to bpf_context */
578	CONST_PTR_TO_MAP, /* reg points to struct bpf_map */
579	PTR_TO_MAP_VALUE, /* reg points to map element value */
580	PTR_TO_MAP_KEY, /* reg points to a map element key */
581	PTR_TO_STACK, /* reg == frame_pointer + offset */
582	PTR_TO_PACKET_META, /* skb->data - meta_len */
583	PTR_TO_PACKET, /* reg points to skb->data */
584	PTR_TO_PACKET_END, /* skb->data + headlen */
585	PTR_TO_FLOW_KEYS, /* reg points to bpf_flow_keys */
586	PTR_TO_SOCKET, /* reg points to struct bpf_sock */
587	PTR_TO_SOCK_COMMON, /* reg points to sock_common */
588	PTR_TO_TCP_SOCK, /* reg points to struct tcp_sock */
589	PTR_TO_TP_BUFFER, /* reg points to a writable raw tp's buffer */
590	PTR_TO_XDP_SOCK, /* reg points to struct xdp_sock */
591	/* PTR_TO_BTF_ID points to a kernel struct that does not need
592	* to be null checked by the BPF program. This does not imply the
593	* pointer is _not_ null and in practice this can easily be a null
594	* pointer when reading pointer chains. The assumption is program
595	* context will handle null pointer dereference typically via fault
596	* handling. The verifier must keep this in mind and can make no
597	* assumptions about null or non-null when doing branch analysis.
598	* Further, when passed into helpers the helpers can not, without
599	* additional context, assume the value is non-null.
600	*/
601	PTR_TO_BTF_ID,
602	/* PTR_TO_BTF_ID_OR_NULL points to a kernel struct that has not
603	* been checked for null. Used primarily to inform the verifier
604	* an explicit null check is required for this struct.
605	*/
606	PTR_TO_MEM, /* reg points to valid memory region */
607	PTR_TO_BUF, /* reg points to a read/write buffer */
608	PTR_TO_FUNC, /* reg points to a bpf program function */
609	__BPF_REG_TYPE_MAX,
610
611	/* Extended reg_types. */
612	PTR_TO_MAP_VALUE_OR_NULL = PTR_MAYBE_NULL | PTR_TO_MAP_VALUE,
613	PTR_TO_SOCKET_OR_NULL = PTR_MAYBE_NULL | PTR_TO_SOCKET,
614	PTR_TO_SOCK_COMMON_OR_NULL = PTR_MAYBE_NULL | PTR_TO_SOCK_COMMON,
615	PTR_TO_TCP_SOCK_OR_NULL = PTR_MAYBE_NULL | PTR_TO_TCP_SOCK,
616	PTR_TO_BTF_ID_OR_NULL = PTR_MAYBE_NULL | PTR_TO_BTF_ID,
617
618	/* This must be the last entry. Its purpose is to ensure the enum is
619	* wide enough to hold the higher bits reserved for bpf_type_flag.
620	*/
621	__BPF_REG_TYPE_LIMIT = BPF_TYPE_LIMIT,
622	};
623	static_assert(__BPF_REG_TYPE_MAX <= BPF_BASE_TYPE_LIMIT);
624
625	/* The information passed from prog-specific *_is_valid_access
626	* back to the verifier.
627	*/
628	struct bpf_insn_access_aux {
629	enum bpf_reg_type reg_type;
630	union {
631	int ctx_field_size;
632	struct {
633	struct btf *btf;
634	u32 btf_id;
635	};
636	};
637	struct bpf_verifier_log *log; /* for verbose logs */
638	};
639
640	static inline void
641	bpf_ctx_record_field_size(struct bpf_insn_access_aux *aux, u32 size)
642	{
643	aux->ctx_field_size = size;
644	}
645
646	static inline bool bpf_pseudo_func(const struct bpf_insn *insn)
647	{
648	return insn->code == (BPF_LD | BPF_IMM | BPF_DW) &&
649	insn->src_reg == BPF_PSEUDO_FUNC;
650	}
651
652	struct bpf_prog_ops {
653	int (*test_run)(struct bpf_prog *prog, const union bpf_attr *kattr,
654	union bpf_attr __user *uattr);
655	};
656
657	struct bpf_verifier_ops {
658	/* return eBPF function prototype for verification */
659	const struct bpf_func_proto *
660	(*get_func_proto)(enum bpf_func_id func_id,
661	const struct bpf_prog *prog);
662
663	/* return true if 'size' wide access at offset 'off' within bpf_context
664	* with 'type' (read or write) is allowed
665	*/
666	bool (*is_valid_access)(int off, int size, enum bpf_access_type type,
667	const struct bpf_prog *prog,
668	struct bpf_insn_access_aux *info);
669	int (*gen_prologue)(struct bpf_insn *insn, bool direct_write,
670	const struct bpf_prog *prog);
671	int (*gen_ld_abs)(const struct bpf_insn *orig,
672	struct bpf_insn *insn_buf);
673	u32 (*convert_ctx_access)(enum bpf_access_type type,
674	const struct bpf_insn *src,
675	struct bpf_insn *dst,
676	struct bpf_prog *prog, u32 *target_size);
677	int (*btf_struct_access)(struct bpf_verifier_log *log,
678	const struct btf *btf,
679	const struct btf_type *t, int off, int size,
680	enum bpf_access_type atype,
681	u32 *next_btf_id, enum bpf_type_flag *flag);
682	};
683
684	struct bpf_prog_offload_ops {
685	/* verifier basic callbacks */
686	int (*insn_hook)(struct bpf_verifier_env *env,
687	int insn_idx, int prev_insn_idx);
688	int (*finalize)(struct bpf_verifier_env *env);
689	/* verifier optimization callbacks (called after .finalize) */
690	int (*replace_insn)(struct bpf_verifier_env *env, u32 off,
691	struct bpf_insn *insn);
692	int (*remove_insns)(struct bpf_verifier_env *env, u32 off, u32 cnt);
693	/* program management callbacks */
694	int (*prepare)(struct bpf_prog *prog);
695	int (*translate)(struct bpf_prog *prog);
696	void (*destroy)(struct bpf_prog *prog);
697	};
698
699	struct bpf_prog_offload {
700	struct bpf_prog *prog;
701	struct net_device *netdev;
702	struct bpf_offload_dev *offdev;
703	void *dev_priv;
704	struct list_head offloads;
705	bool dev_state;
706	bool opt_failed;
707	void *jited_image;
708	u32 jited_len;
709	};
710
711	enum bpf_cgroup_storage_type {
712	BPF_CGROUP_STORAGE_SHARED,
713	BPF_CGROUP_STORAGE_PERCPU,
714	__BPF_CGROUP_STORAGE_MAX
715	};
716
717	#define MAX_BPF_CGROUP_STORAGE_TYPE __BPF_CGROUP_STORAGE_MAX
718
719	/* The longest tracepoint has 12 args.
720	* See include/trace/bpf_probe.h
721	*/
722	#define MAX_BPF_FUNC_ARGS 12
723
724	/* The maximum number of arguments passed through registers
725	* a single function may have.
726	*/
727	#define MAX_BPF_FUNC_REG_ARGS 5
728
729	struct btf_func_model {
730	u8 ret_size;
731	u8 nr_args;
732	u8 arg_size[MAX_BPF_FUNC_ARGS];
733	};
734
735	/* Restore arguments before returning from trampoline to let original function
736	* continue executing. This flag is used for fentry progs when there are no
737	* fexit progs.
738	*/
739	#define BPF_TRAMP_F_RESTORE_REGS BIT(0)
740	/* Call original function after fentry progs, but before fexit progs.
741	* Makes sense for fentry/fexit, normal calls and indirect calls.
742	*/
743	#define BPF_TRAMP_F_CALL_ORIG BIT(1)
744	/* Skip current frame and return to parent. Makes sense for fentry/fexit
745	* programs only. Should not be used with normal calls and indirect calls.
746	*/
747	#define BPF_TRAMP_F_SKIP_FRAME BIT(2)
748	/* Store IP address of the caller on the trampoline stack,
749	* so it's available for trampoline's programs.
750	*/
751	#define BPF_TRAMP_F_IP_ARG BIT(3)
752	/* Return the return value of fentry prog. Only used by bpf_struct_ops. */
753	#define BPF_TRAMP_F_RET_FENTRY_RET BIT(4)
754
755	/* Get original function from stack instead of from provided direct address.
756	* Makes sense for trampolines with fexit or fmod_ret programs.
757	*/
758	#define BPF_TRAMP_F_ORIG_STACK BIT(5)
759
760	/* This trampoline is on a function with another ftrace_ops with IPMODIFY,
761	* e.g., a live patch. This flag is set and cleared by ftrace call backs,
762	*/
763	#define BPF_TRAMP_F_SHARE_IPMODIFY BIT(6)
764
765	/* Each call __bpf_prog_enter + call bpf_func + call __bpf_prog_exit is ~50
766	* bytes on x86.
767	*/
768	#define BPF_MAX_TRAMP_LINKS 38
769
770	struct bpf_tramp_links {
771	struct bpf_tramp_link *links[BPF_MAX_TRAMP_LINKS];
772	int nr_links;
773	};
774
775	struct bpf_tramp_run_ctx;
776
777	/* Different use cases for BPF trampoline:
778	* 1. replace nop at the function entry (kprobe equivalent)
779	* flags = BPF_TRAMP_F_RESTORE_REGS
780	* fentry = a set of programs to run before returning from trampoline
781	*
782	* 2. replace nop at the function entry (kprobe + kretprobe equivalent)
783	* flags = BPF_TRAMP_F_CALL_ORIG | BPF_TRAMP_F_SKIP_FRAME
784	* orig_call = fentry_ip + MCOUNT_INSN_SIZE
785	* fentry = a set of program to run before calling original function
786	* fexit = a set of program to run after original function
787	*
788	* 3. replace direct call instruction anywhere in the function body
789	* or assign a function pointer for indirect call (like tcp_congestion_ops->cong_avoid)
790	* With flags = 0
791	* fentry = a set of programs to run before returning from trampoline
792	* With flags = BPF_TRAMP_F_CALL_ORIG
793	* orig_call = original callback addr or direct function addr
794	* fentry = a set of program to run before calling original function
795	* fexit = a set of program to run after original function
796	*/
797	struct bpf_tramp_image;
798	int arch_prepare_bpf_trampoline(struct bpf_tramp_image *tr, void *image, void *image_end,
799	const struct btf_func_model *m, u32 flags,
800	struct bpf_tramp_links *tlinks,
801	void *orig_call);
802	/* these two functions are called from generated trampoline */
803	u64 notrace __bpf_prog_enter(struct bpf_prog *prog, struct bpf_tramp_run_ctx *run_ctx);
804	void notrace __bpf_prog_exit(struct bpf_prog *prog, u64 start, struct bpf_tramp_run_ctx *run_ctx);
805	u64 notrace __bpf_prog_enter_sleepable(struct bpf_prog *prog, struct bpf_tramp_run_ctx *run_ctx);
806	void notrace __bpf_prog_exit_sleepable(struct bpf_prog *prog, u64 start,
807	struct bpf_tramp_run_ctx *run_ctx);
808	u64 notrace __bpf_prog_enter_lsm_cgroup(struct bpf_prog *prog,
809	struct bpf_tramp_run_ctx *run_ctx);
810	void notrace __bpf_prog_exit_lsm_cgroup(struct bpf_prog *prog, u64 start,
811	struct bpf_tramp_run_ctx *run_ctx);
812	void notrace __bpf_tramp_enter(struct bpf_tramp_image *tr);
813	void notrace __bpf_tramp_exit(struct bpf_tramp_image *tr);
814
815	struct bpf_ksym {
816	unsigned long start;
817	unsigned long end;
818	char name[KSYM_NAME_LEN];
819	struct list_head lnode;
820	struct latch_tree_node tnode;
821	bool prog;
822	};
823
824	enum bpf_tramp_prog_type {
825	BPF_TRAMP_FENTRY,
826	BPF_TRAMP_FEXIT,
827	BPF_TRAMP_MODIFY_RETURN,
828	BPF_TRAMP_MAX,
829	BPF_TRAMP_REPLACE, /* more than MAX */
830	};
831
832	struct bpf_tramp_image {
833	void *image;
834	struct bpf_ksym ksym;
835	struct percpu_ref pcref;
836	void *ip_after_call;
837	void *ip_epilogue;
838	union {
839	struct rcu_head rcu;
840	struct work_struct work;
841	};
842	};
843
844	struct bpf_trampoline {
845	/* hlist for trampoline_table */
846	struct hlist_node hlist;
847	struct ftrace_ops *fops;
848	/* serializes access to fields of this trampoline */
849	struct mutex mutex;
850	refcount_t refcnt;
851	u32 flags;
852	u64 key;
853	struct {
854	struct btf_func_model model;
855	void *addr;
856	bool ftrace_managed;
857	} func;
858	/* if !NULL this is BPF_PROG_TYPE_EXT program that extends another BPF
859	* program by replacing one of its functions. func.addr is the address
860	* of the function it replaced.
861	*/
862	struct bpf_prog *extension_prog;
863	/* list of BPF programs using this trampoline */
864	struct hlist_head progs_hlist[BPF_TRAMP_MAX];
865	/* Number of attached programs. A counter per kind. */
866	int progs_cnt[BPF_TRAMP_MAX];
867	/* Executable image of trampoline */
868	struct bpf_tramp_image *cur_image;
869	u64 selector;
870	struct module *mod;
871	};
872
873	struct bpf_attach_target_info {
874	struct btf_func_model fmodel;
875	long tgt_addr;
876	const char *tgt_name;
877	const struct btf_type *tgt_type;
878	};
879
880	#define BPF_DISPATCHER_MAX 48 /* Fits in 2048B */
881
882	struct bpf_dispatcher_prog {
883	struct bpf_prog *prog;
884	refcount_t users;
885	};
886
887	struct bpf_dispatcher {
888	/* dispatcher mutex */
889	struct mutex mutex;
890	void *func;
891	struct bpf_dispatcher_prog progs[BPF_DISPATCHER_MAX];
892	int num_progs;
893	void *image;
894	u32 image_off;
895	struct bpf_ksym ksym;
896	};
897
898	static __always_inline __nocfi unsigned int bpf_dispatcher_nop_func(
899	const void *ctx,
900	const struct bpf_insn *insnsi,
901	bpf_func_t bpf_func)
902	{
903	return bpf_func(ctx, insnsi);
904	}
905
906	#ifdef CONFIG_BPF_JIT
907	int bpf_trampoline_link_prog(struct bpf_tramp_link *link, struct bpf_trampoline *tr);
908	int bpf_trampoline_unlink_prog(struct bpf_tramp_link *link, struct bpf_trampoline *tr);
909	struct bpf_trampoline *bpf_trampoline_get(u64 key,
910	struct bpf_attach_target_info *tgt_info);
911	void bpf_trampoline_put(struct bpf_trampoline *tr);
912	int arch_prepare_bpf_dispatcher(void *image, s64 *funcs, int num_funcs);
913	#define BPF_DISPATCHER_INIT(_name) { \
914	.mutex = __MUTEX_INITIALIZER(_name.mutex), \
915	.func = &_name##_func, \
916	.progs = {}, \
917	.num_progs = 0, \
918	.image = NULL, \
919	.image_off = 0, \
920	.ksym = { \
921	.name = #_name, \
922	.lnode = LIST_HEAD_INIT(_name.ksym.lnode), \
923	}, \
924	}
925
926	#define DEFINE_BPF_DISPATCHER(name) \
927	noinline __nocfi unsigned int bpf_dispatcher_##name##_func( \
928	const void *ctx, \
929	const struct bpf_insn *insnsi, \
930	bpf_func_t bpf_func) \
931	{ \
932	return bpf_func(ctx, insnsi); \
933	} \
934	EXPORT_SYMBOL(bpf_dispatcher_##name##_func); \
935	struct bpf_dispatcher bpf_dispatcher_##name = \
936	BPF_DISPATCHER_INIT(bpf_dispatcher_##name);
937	#define DECLARE_BPF_DISPATCHER(name) \
938	unsigned int bpf_dispatcher_##name##_func( \
939	const void *ctx, \
940	const struct bpf_insn *insnsi, \
941	bpf_func_t bpf_func); \
942	extern struct bpf_dispatcher bpf_dispatcher_##name;
943	#define BPF_DISPATCHER_FUNC(name) bpf_dispatcher_##name##_func
944	#define BPF_DISPATCHER_PTR(name) (&bpf_dispatcher_##name)
945	void bpf_dispatcher_change_prog(struct bpf_dispatcher *d, struct bpf_prog *from,
946	struct bpf_prog *to);
947	/* Called only from JIT-enabled code, so there's no need for stubs. */
948	void *bpf_jit_alloc_exec_page(void);
949	void bpf_image_ksym_add(void *data, struct bpf_ksym *ksym);
950	void bpf_image_ksym_del(struct bpf_ksym *ksym);
951	void bpf_ksym_add(struct bpf_ksym *ksym);
952	void bpf_ksym_del(struct bpf_ksym *ksym);
953	int bpf_jit_charge_modmem(u32 size);
954	void bpf_jit_uncharge_modmem(u32 size);
955	bool bpf_prog_has_trampoline(const struct bpf_prog *prog);
956	#else
957	static inline int bpf_trampoline_link_prog(struct bpf_tramp_link *link,
958	struct bpf_trampoline *tr)
959	{
960	return -ENOTSUPP;
961	}
962	static inline int bpf_trampoline_unlink_prog(struct bpf_tramp_link *link,
963	struct bpf_trampoline *tr)
964	{
965	return -ENOTSUPP;
966	}
967	static inline struct bpf_trampoline *bpf_trampoline_get(u64 key,
968	struct bpf_attach_target_info *tgt_info)
969	{
970	return ERR_PTR(-EOPNOTSUPP);
971	}
972	static inline void bpf_trampoline_put(struct bpf_trampoline *tr) {}
973	#define DEFINE_BPF_DISPATCHER(name)
974	#define DECLARE_BPF_DISPATCHER(name)
975	#define BPF_DISPATCHER_FUNC(name) bpf_dispatcher_nop_func
976	#define BPF_DISPATCHER_PTR(name) NULL
977	static inline void bpf_dispatcher_change_prog(struct bpf_dispatcher *d,
978	struct bpf_prog *from,
979	struct bpf_prog *to) {}
980	static inline bool is_bpf_image_address(unsigned long address)
981	{
982	return false;
983	}
984	static inline bool bpf_prog_has_trampoline(const struct bpf_prog *prog)
985	{
986	return false;
987	}
988	#endif
989
990	struct bpf_func_info_aux {
991	u16 linkage;
992	bool unreliable;
993	};
994
995	enum bpf_jit_poke_reason {
996	BPF_POKE_REASON_TAIL_CALL,
997	};
998
999	/* Descriptor of pokes pointing /into/ the JITed image. */
1000	struct bpf_jit_poke_descriptor {
1001	void *tailcall_target;
1002	void *tailcall_bypass;
1003	void *bypass_addr;
1004	void *aux;
1005	union {
1006	struct {
1007	struct bpf_map *map;
1008	u32 key;
1009	} tail_call;
1010	};
1011	bool tailcall_target_stable;
1012	u8 adj_off;
1013	u16 reason;
1014	u32 insn_idx;
1015	};
1016
1017	/* reg_type info for ctx arguments */
1018	struct bpf_ctx_arg_aux {
1019	u32 offset;
1020	enum bpf_reg_type reg_type;
1021	u32 btf_id;
1022	};
1023
1024	struct btf_mod_pair {
1025	struct btf *btf;
1026	struct module *module;
1027	};
1028
1029	struct bpf_kfunc_desc_tab;
1030
1031	struct bpf_prog_aux {
1032	atomic64_t refcnt;
1033	u32 used_map_cnt;
1034	u32 used_btf_cnt;
1035	u32 max_ctx_offset;
1036	u32 max_pkt_offset;
1037	u32 max_tp_access;
1038	u32 stack_depth;
1039	u32 id;
1040	u32 func_cnt; /* used by non-func prog as the number of func progs */
1041	u32 func_idx; /* 0 for non-func prog, the index in func array for func prog */
1042	u32 attach_btf_id; /* in-kernel BTF type id to attach to */
1043	u32 ctx_arg_info_size;
1044	u32 max_rdonly_access;
1045	u32 max_rdwr_access;
1046	struct btf *attach_btf;
1047	const struct bpf_ctx_arg_aux *ctx_arg_info;
1048	struct mutex dst_mutex; /* protects dst_* pointers below, *after* prog becomes visible */
1049	struct bpf_prog *dst_prog;
1050	struct bpf_trampoline *dst_trampoline;
1051	enum bpf_prog_type saved_dst_prog_type;
1052	enum bpf_attach_type saved_dst_attach_type;
1053	bool verifier_zext; /* Zero extensions has been inserted by verifier. */
1054	bool offload_requested;
1055	bool attach_btf_trace; /* true if attaching to BTF-enabled raw tp */
1056	bool func_proto_unreliable;
1057	bool sleepable;
1058	bool tail_call_reachable;
1059	bool xdp_has_frags;
1060	/* BTF_KIND_FUNC_PROTO for valid attach_btf_id */
1061	const struct btf_type *attach_func_proto;
1062	/* function name for valid attach_btf_id */
1063	const char *attach_func_name;
1064	struct bpf_prog **func;
1065	void *jit_data; /* JIT specific data. arch dependent */
1066	struct bpf_jit_poke_descriptor *poke_tab;
1067	struct bpf_kfunc_desc_tab *kfunc_tab;
1068	struct bpf_kfunc_btf_tab *kfunc_btf_tab;
1069	u32 size_poke_tab;
1070	struct bpf_ksym ksym;
1071	const struct bpf_prog_ops *ops;
1072	struct bpf_map **used_maps;
1073	struct mutex used_maps_mutex; /* mutex for used_maps and used_map_cnt */
1074	struct btf_mod_pair *used_btfs;
1075	struct bpf_prog *prog;
1076	struct user_struct *user;
1077	u64 load_time; /* ns since boottime */
1078	u32 verified_insns;
1079	int cgroup_atype; /* enum cgroup_bpf_attach_type */
1080	struct bpf_map *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE];
1081	char name[BPF_OBJ_NAME_LEN];
1082	#ifdef CONFIG_SECURITY
1083	void *security;
1084	#endif
1085	struct bpf_prog_offload *offload;
1086	struct btf *btf;
1087	struct bpf_func_info *func_info;
1088	struct bpf_func_info_aux *func_info_aux;
1089	/* bpf_line_info loaded from userspace. linfo->insn_off
1090	* has the xlated insn offset.
1091	* Both the main and sub prog share the same linfo.
1092	* The subprog can access its first linfo by
1093	* using the linfo_idx.
1094	*/
1095	struct bpf_line_info *linfo;
1096	/* jited_linfo is the jited addr of the linfo. It has a
1097	* one to one mapping to linfo:
1098	* jited_linfo[i] is the jited addr for the linfo[i]->insn_off.
1099	* Both the main and sub prog share the same jited_linfo.
1100	* The subprog can access its first jited_linfo by
1101	* using the linfo_idx.
1102	*/
1103	void **jited_linfo;
1104	u32 func_info_cnt;
1105	u32 nr_linfo;
1106	/* subprog can use linfo_idx to access its first linfo and
1107	* jited_linfo.
1108	* main prog always has linfo_idx == 0
1109	*/
1110	u32 linfo_idx;
1111	u32 num_exentries;
1112	struct exception_table_entry *extable;
1113	union {
1114	struct work_struct work;
1115	struct rcu_head rcu;
1116	};
1117	};
1118
1119	struct bpf_prog {
1120	u16 pages; /* Number of allocated pages */
1121	u16 jited:1, /* Is our filter JIT'ed? */
1122	jit_requested:1,/* archs need to JIT the prog */
1123	gpl_compatible:1, /* Is filter GPL compatible? */
1124	cb_access:1, /* Is control block accessed? */
1125	dst_needed:1, /* Do we need dst entry? */
1126	blinding_requested:1, /* needs constant blinding */
1127	blinded:1, /* Was blinded */
1128	is_func:1, /* program is a bpf function */
1129	kprobe_override:1, /* Do we override a kprobe? */
1130	has_callchain_buf:1, /* callchain buffer allocated? */
1131	enforce_expected_attach_type:1, /* Enforce expected_attach_type checking at attach time */
1132	call_get_stack:1, /* Do we call bpf_get_stack() or bpf_get_stackid() */
1133	call_get_func_ip:1, /* Do we call get_func_ip() */
1134	tstamp_type_access:1; /* Accessed __sk_buff->tstamp_type */
1135	enum bpf_prog_type type; /* Type of BPF program */
1136	enum bpf_attach_type expected_attach_type; /* For some prog types */
1137	u32 len; /* Number of filter blocks */
1138	u32 jited_len; /* Size of jited insns in bytes */
1139	u8 tag[BPF_TAG_SIZE];
1140	struct bpf_prog_stats __percpu *stats;
1141	int __percpu *active;
1142	unsigned int (*bpf_func)(const void *ctx,
1143	const struct bpf_insn *insn);
1144	struct bpf_prog_aux *aux; /* Auxiliary fields */
1145	struct sock_fprog_kern *orig_prog; /* Original BPF program */
1146	/* Instructions for interpreter */
1147	union {
1148	DECLARE_FLEX_ARRAY(struct sock_filter, insns);
1149	DECLARE_FLEX_ARRAY(struct bpf_insn, insnsi);
1150	};
1151	};
1152
1153	struct bpf_array_aux {
1154	/* Programs with direct jumps into programs part of this array. */
1155	struct list_head poke_progs;
1156	struct bpf_map *map;
1157	struct mutex poke_mutex;
1158	struct work_struct work;
1159	};
1160
1161	struct bpf_link {
1162	atomic64_t refcnt;
1163	u32 id;
1164	enum bpf_link_type type;
1165	const struct bpf_link_ops *ops;
1166	struct bpf_prog *prog;
1167	struct work_struct work;
1168	};
1169
1170	struct bpf_link_ops {
1171	void (*release)(struct bpf_link *link);
1172	void (*dealloc)(struct bpf_link *link);
1173	int (*detach)(struct bpf_link *link);
1174	int (*update_prog)(struct bpf_link *link, struct bpf_prog *new_prog,
1175	struct bpf_prog *old_prog);
1176	void (*show_fdinfo)(const struct bpf_link *link, struct seq_file *seq);
1177	int (*fill_link_info)(const struct bpf_link *link,
1178	struct bpf_link_info *info);
1179	};
1180
1181	struct bpf_tramp_link {
1182	struct bpf_link link;
1183	struct hlist_node tramp_hlist;
1184	u64 cookie;
1185	};
1186
1187	struct bpf_shim_tramp_link {
1188	struct bpf_tramp_link link;
1189	struct bpf_trampoline *trampoline;
1190	};
1191
1192	struct bpf_tracing_link {
1193	struct bpf_tramp_link link;
1194	enum bpf_attach_type attach_type;
1195	struct bpf_trampoline *trampoline;
1196	struct bpf_prog *tgt_prog;
1197	};
1198
1199	struct bpf_link_primer {
1200	struct bpf_link *link;
1201	struct file *file;
1202	int fd;
1203	u32 id;
1204	};
1205
1206	struct bpf_struct_ops_value;
1207	struct btf_member;
1208
1209	#define BPF_STRUCT_OPS_MAX_NR_MEMBERS 64
1210	struct bpf_struct_ops {
1211	const struct bpf_verifier_ops *verifier_ops;
1212	int (*init)(struct btf *btf);
1213	int (*check_member)(const struct btf_type *t,
1214	const struct btf_member *member);
1215	int (*init_member)(const struct btf_type *t,
1216	const struct btf_member *member,
1217	void *kdata, const void *udata);
1218	int (*reg)(void *kdata);
1219	void (*unreg)(void *kdata);
1220	const struct btf_type *type;
1221	const struct btf_type *value_type;
1222	const char *name;
1223	struct btf_func_model func_models[BPF_STRUCT_OPS_MAX_NR_MEMBERS];
1224	u32 type_id;
1225	u32 value_id;
1226	};
1227
1228	#if defined(CONFIG_BPF_JIT) && defined(CONFIG_BPF_SYSCALL)
1229	#define BPF_MODULE_OWNER ((void *)((0xeB9FUL << 2) + POISON_POINTER_DELTA))
1230	const struct bpf_struct_ops *bpf_struct_ops_find(u32 type_id);
1231	void bpf_struct_ops_init(struct btf *btf, struct bpf_verifier_log *log);
1232	bool bpf_struct_ops_get(const void *kdata);
1233	void bpf_struct_ops_put(const void *kdata);
1234	int bpf_struct_ops_map_sys_lookup_elem(struct bpf_map *map, void *key,
1235	void *value);
1236	int bpf_struct_ops_prepare_trampoline(struct bpf_tramp_links *tlinks,
1237	struct bpf_tramp_link *link,
1238	const struct btf_func_model *model,
1239	void *image, void *image_end);
1240	static inline bool bpf_try_module_get(const void *data, struct module *owner)
1241	{
1242	if (owner == BPF_MODULE_OWNER)
1243	return bpf_struct_ops_get(data);
1244	else
1245	return try_module_get(owner);
1246	}
1247	static inline void bpf_module_put(const void *data, struct module *owner)
1248	{
1249	if (owner == BPF_MODULE_OWNER)
1250	bpf_struct_ops_put(data);
1251	else
1252	module_put(owner);
1253	}
1254
1255	#ifdef CONFIG_NET
1256	/* Define it here to avoid the use of forward declaration */
1257	struct bpf_dummy_ops_state {
1258	int val;
1259	};
1260
1261	struct bpf_dummy_ops {
1262	int (*test_1)(struct bpf_dummy_ops_state *cb);
1263	int (*test_2)(struct bpf_dummy_ops_state *cb, int a1, unsigned short a2,
1264	char a3, unsigned long a4);
1265	};
1266
1267	int bpf_struct_ops_test_run(struct bpf_prog *prog, const union bpf_attr *kattr,
1268	union bpf_attr __user *uattr);
1269	#endif
1270	#else
1271	static inline const struct bpf_struct_ops *bpf_struct_ops_find(u32 type_id)
1272	{
1273	return NULL;
1274	}
1275	static inline void bpf_struct_ops_init(struct btf *btf,
1276	struct bpf_verifier_log *log)
1277	{
1278	}
1279	static inline bool bpf_try_module_get(const void *data, struct module *owner)
1280	{
1281	return try_module_get(owner);
1282	}
1283	static inline void bpf_module_put(const void *data, struct module *owner)
1284	{
1285	module_put(owner);
1286	}
1287	static inline int bpf_struct_ops_map_sys_lookup_elem(struct bpf_map *map,
1288	void *key,
1289	void *value)
1290	{
1291	return -EINVAL;
1292	}
1293	#endif
1294
1295	#if defined(CONFIG_CGROUP_BPF) && defined(CONFIG_BPF_LSM)
1296	int bpf_trampoline_link_cgroup_shim(struct bpf_prog *prog,
1297	int cgroup_atype);
1298	void bpf_trampoline_unlink_cgroup_shim(struct bpf_prog *prog);
1299	#else
1300	static inline int bpf_trampoline_link_cgroup_shim(struct bpf_prog *prog,
1301	int cgroup_atype)
1302	{
1303	return -EOPNOTSUPP;
1304	}
1305	static inline void bpf_trampoline_unlink_cgroup_shim(struct bpf_prog *prog)
1306	{
1307	}
1308	#endif
1309
1310	struct bpf_array {
1311	struct bpf_map map;
1312	u32 elem_size;
1313	u32 index_mask;
1314	struct bpf_array_aux *aux;
1315	union {
1316	char value[0] __aligned(8);
1317	void *ptrs[0] __aligned(8);
1318	void __percpu *pptrs[0] __aligned(8);
1319	};
1320	};
1321
1322	#define BPF_COMPLEXITY_LIMIT_INSNS 1000000 /* yes. 1M insns */
1323	#define MAX_TAIL_CALL_CNT 33
1324
1325	/* Maximum number of loops for bpf_loop */
1326	#define BPF_MAX_LOOPS BIT(23)
1327
1328	#define BPF_F_ACCESS_MASK (BPF_F_RDONLY | \
1329	BPF_F_RDONLY_PROG | \
1330	BPF_F_WRONLY | \
1331	BPF_F_WRONLY_PROG)
1332
1333	#define BPF_MAP_CAN_READ BIT(0)
1334	#define BPF_MAP_CAN_WRITE BIT(1)
1335
1336	static inline u32 bpf_map_flags_to_cap(struct bpf_map *map)
1337	{
1338	u32 access_flags = map->map_flags & (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG);
1339
1340	/* Combination of BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG is
1341	* not possible.
1342	*/
1343	if (access_flags & BPF_F_RDONLY_PROG)
1344	return BPF_MAP_CAN_READ;
1345	else if (access_flags & BPF_F_WRONLY_PROG)
1346	return BPF_MAP_CAN_WRITE;
1347	else
1348	return BPF_MAP_CAN_READ | BPF_MAP_CAN_WRITE;
1349	}
1350
1351	static inline bool bpf_map_flags_access_ok(u32 access_flags)
1352	{
1353	return (access_flags & (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG)) !=
1354	(BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG);
1355	}
1356
1357	struct bpf_event_entry {
1358	struct perf_event *event;
1359	struct file *perf_file;
1360	struct file *map_file;
1361	struct rcu_head rcu;
1362	};
1363
1364	static inline bool map_type_contains_progs(struct bpf_map *map)
1365	{
1366	return map->map_type == BPF_MAP_TYPE_PROG_ARRAY ||
1367	map->map_type == BPF_MAP_TYPE_DEVMAP ||
1368	map->map_type == BPF_MAP_TYPE_CPUMAP;
1369	}
1370
1371	bool bpf_prog_map_compatible(struct bpf_map *map, const struct bpf_prog *fp);
1372	int bpf_prog_calc_tag(struct bpf_prog *fp);
1373
1374	const struct bpf_func_proto *bpf_get_trace_printk_proto(void);
1375	const struct bpf_func_proto *bpf_get_trace_vprintk_proto(void);
1376
1377	typedef unsigned long (*bpf_ctx_copy_t)(void *dst, const void *src,
1378	unsigned long off, unsigned long len);
1379	typedef u32 (*bpf_convert_ctx_access_t)(enum bpf_access_type type,
1380	const struct bpf_insn *src,
1381	struct bpf_insn *dst,
1382	struct bpf_prog *prog,
1383	u32 *target_size);
1384
1385	u64 bpf_event_output(struct bpf_map *map, u64 flags, void *meta, u64 meta_size,
1386	void *ctx, u64 ctx_size, bpf_ctx_copy_t ctx_copy);
1387
1388	/* an array of programs to be executed under rcu_lock.
1389	*
1390	* Typical usage:
1391	* ret = bpf_prog_run_array(rcu_dereference(&bpf_prog_array), ctx, bpf_prog_run);
1392	*
1393	* the structure returned by bpf_prog_array_alloc() should be populated
1394	* with program pointers and the last pointer must be NULL.
1395	* The user has to keep refcnt on the program and make sure the program
1396	* is removed from the array before bpf_prog_put().
1397	* The 'struct bpf_prog_array *' should only be replaced with xchg()
1398	* since other cpus are walking the array of pointers in parallel.
1399	*/
1400	struct bpf_prog_array_item {
1401	struct bpf_prog *prog;
1402	union {
1403	struct bpf_cgroup_storage *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE];
1404	u64 bpf_cookie;
1405	};
1406	};
1407
1408	struct bpf_prog_array {
1409	struct rcu_head rcu;
1410	struct bpf_prog_array_item items[];
1411	};
1412
1413	struct bpf_empty_prog_array {
1414	struct bpf_prog_array hdr;
1415	struct bpf_prog *null_prog;
1416	};
1417
1418	/* to avoid allocating empty bpf_prog_array for cgroups that
1419	* don't have bpf program attached use one global 'bpf_empty_prog_array'
1420	* It will not be modified the caller of bpf_prog_array_alloc()
1421	* (since caller requested prog_cnt == 0)
1422	* that pointer should be 'freed' by bpf_prog_array_free()
1423	*/
1424	extern struct bpf_empty_prog_array bpf_empty_prog_array;
1425
1426	struct bpf_prog_array *bpf_prog_array_alloc(u32 prog_cnt, gfp_t flags);
1427	void bpf_prog_array_free(struct bpf_prog_array *progs);
1428	/* Use when traversal over the bpf_prog_array uses tasks_trace rcu */
1429	void bpf_prog_array_free_sleepable(struct bpf_prog_array *progs);
1430	int bpf_prog_array_length(struct bpf_prog_array *progs);
1431	bool bpf_prog_array_is_empty(struct bpf_prog_array *array);
1432	int bpf_prog_array_copy_to_user(struct bpf_prog_array *progs,
1433	__u32 __user *prog_ids, u32 cnt);
1434
1435	void bpf_prog_array_delete_safe(struct bpf_prog_array *progs,
1436	struct bpf_prog *old_prog);
1437	int bpf_prog_array_delete_safe_at(struct bpf_prog_array *array, int index);
1438	int bpf_prog_array_update_at(struct bpf_prog_array *array, int index,
1439	struct bpf_prog *prog);
1440	int bpf_prog_array_copy_info(struct bpf_prog_array *array,
1441	u32 *prog_ids, u32 request_cnt,
1442	u32 *prog_cnt);
1443	int bpf_prog_array_copy(struct bpf_prog_array *old_array,
1444	struct bpf_prog *exclude_prog,
1445	struct bpf_prog *include_prog,
1446	u64 bpf_cookie,
1447	struct bpf_prog_array **new_array);
1448
1449	struct bpf_run_ctx {};
1450
1451	struct bpf_cg_run_ctx {
1452	struct bpf_run_ctx run_ctx;
1453	const struct bpf_prog_array_item *prog_item;
1454	int retval;
1455	};
1456
1457	struct bpf_trace_run_ctx {
1458	struct bpf_run_ctx run_ctx;
1459	u64 bpf_cookie;
1460	};
1461
1462	struct bpf_tramp_run_ctx {
1463	struct bpf_run_ctx run_ctx;
1464	u64 bpf_cookie;
1465	struct bpf_run_ctx *saved_run_ctx;
1466	};
1467
1468	static inline struct bpf_run_ctx *bpf_set_run_ctx(struct bpf_run_ctx *new_ctx)
1469	{
1470	struct bpf_run_ctx *old_ctx = NULL;
1471
1472	#ifdef CONFIG_BPF_SYSCALL
1473	old_ctx = current->bpf_ctx;
1474	current->bpf_ctx = new_ctx;
1475	#endif
1476	return old_ctx;
1477	}
1478
1479	static inline void bpf_reset_run_ctx(struct bpf_run_ctx *old_ctx)
1480	{
1481	#ifdef CONFIG_BPF_SYSCALL
1482	current->bpf_ctx = old_ctx;
1483	#endif
1484	}
1485
1486	/* BPF program asks to bypass CAP_NET_BIND_SERVICE in bind. */
1487	#define BPF_RET_BIND_NO_CAP_NET_BIND_SERVICE (1 << 0)
1488	/* BPF program asks to set CN on the packet. */
1489	#define BPF_RET_SET_CN (1 << 0)
1490
1491	typedef u32 (*bpf_prog_run_fn)(const struct bpf_prog *prog, const void *ctx);
1492
1493	static __always_inline u32
1494	bpf_prog_run_array(const struct bpf_prog_array *array,
1495	const void *ctx, bpf_prog_run_fn run_prog)
1496	{
1497	const struct bpf_prog_array_item *item;
1498	const struct bpf_prog *prog;
1499	struct bpf_run_ctx *old_run_ctx;
1500	struct bpf_trace_run_ctx run_ctx;
1501	u32 ret = 1;
1502
1503	RCU_LOCKDEP_WARN(!rcu_read_lock_held(), "no rcu lock held");
1504
1505	if (unlikely(!array))
1506	return ret;
1507
1508	migrate_disable();
1509	old_run_ctx = bpf_set_run_ctx(&run_ctx.run_ctx);
1510	item = &array->items[0];
1511	while ((prog = READ_ONCE(item->prog))) {
1512	run_ctx.bpf_cookie = item->bpf_cookie;
1513	ret &= run_prog(prog, ctx);
1514	item++;
1515	}
1516	bpf_reset_run_ctx(old_run_ctx);
1517	migrate_enable();
1518	return ret;
1519	}
1520
1521	/* Notes on RCU design for bpf_prog_arrays containing sleepable programs:
1522	*
1523	* We use the tasks_trace rcu flavor read section to protect the bpf_prog_array
1524	* overall. As a result, we must use the bpf_prog_array_free_sleepable
1525	* in order to use the tasks_trace rcu grace period.
1526	*
1527	* When a non-sleepable program is inside the array, we take the rcu read
1528	* section and disable preemption for that program alone, so it can access
1529	* rcu-protected dynamically sized maps.
1530	*/
1531	static __always_inline u32
1532	bpf_prog_run_array_sleepable(const struct bpf_prog_array __rcu *array_rcu,
1533	const void *ctx, bpf_prog_run_fn run_prog)
1534	{
1535	const struct bpf_prog_array_item *item;
1536	const struct bpf_prog *prog;
1537	const struct bpf_prog_array *array;
1538	struct bpf_run_ctx *old_run_ctx;
1539	struct bpf_trace_run_ctx run_ctx;
1540	u32 ret = 1;
1541
1542	might_fault();
1543
1544	rcu_read_lock_trace();
1545	migrate_disable();
1546
1547	array = rcu_dereference_check(array_rcu, rcu_read_lock_trace_held());
1548	if (unlikely(!array))
1549	goto out;
1550	old_run_ctx = bpf_set_run_ctx(&run_ctx.run_ctx);
1551	item = &array->items[0];
1552	while ((prog = READ_ONCE(item->prog))) {
1553	if (!prog->aux->sleepable)
1554	rcu_read_lock();
1555
1556	run_ctx.bpf_cookie = item->bpf_cookie;
1557	ret &= run_prog(prog, ctx);
1558	item++;
1559
1560	if (!prog->aux->sleepable)
1561	rcu_read_unlock();
1562	}
1563	bpf_reset_run_ctx(old_run_ctx);
1564	out:
1565	migrate_enable();
1566	rcu_read_unlock_trace();
1567	return ret;
1568	}
1569
1570	#ifdef CONFIG_BPF_SYSCALL
1571	DECLARE_PER_CPU(int, bpf_prog_active);
1572	extern struct mutex bpf_stats_enabled_mutex;
1573
1574	/*
1575	* Block execution of BPF programs attached to instrumentation (perf,
1576	* kprobes, tracepoints) to prevent deadlocks on map operations as any of
1577	* these events can happen inside a region which holds a map bucket lock
1578	* and can deadlock on it.
1579	*/
1580	static inline void bpf_disable_instrumentation(void)
1581	{
1582	migrate_disable();
1583	this_cpu_inc(bpf_prog_active);
1584	}
1585
1586	static inline void bpf_enable_instrumentation(void)
1587	{
1588	this_cpu_dec(bpf_prog_active);
1589	migrate_enable();
1590	}
1591
1592	extern const struct file_operations bpf_map_fops;
1593	extern const struct file_operations bpf_prog_fops;
1594	extern const struct file_operations bpf_iter_fops;
1595
1596	#define BPF_PROG_TYPE(_id, _name, prog_ctx_type, kern_ctx_type) \
1597	extern const struct bpf_prog_ops _name ## _prog_ops; \
1598	extern const struct bpf_verifier_ops _name ## _verifier_ops;
1599	#define BPF_MAP_TYPE(_id, _ops) \
1600	extern const struct bpf_map_ops _ops;
1601	#define BPF_LINK_TYPE(_id, _name)
1602	#include <linux/bpf_types.h>
1603	#undef BPF_PROG_TYPE
1604	#undef BPF_MAP_TYPE
1605	#undef BPF_LINK_TYPE
1606
1607	extern const struct bpf_prog_ops bpf_offload_prog_ops;
1608	extern const struct bpf_verifier_ops tc_cls_act_analyzer_ops;
1609	extern const struct bpf_verifier_ops xdp_analyzer_ops;
1610
1611	struct bpf_prog *bpf_prog_get(u32 ufd);
1612	struct bpf_prog *bpf_prog_get_type_dev(u32 ufd, enum bpf_prog_type type,
1613	bool attach_drv);
1614	void bpf_prog_add(struct bpf_prog *prog, int i);
1615	void bpf_prog_sub(struct bpf_prog *prog, int i);
1616	void bpf_prog_inc(struct bpf_prog *prog);
1617	struct bpf_prog * __must_check bpf_prog_inc_not_zero(struct bpf_prog *prog);
1618	void bpf_prog_put(struct bpf_prog *prog);
1619
1620	void bpf_prog_free_id(struct bpf_prog *prog, bool do_idr_lock);
1621	void bpf_map_free_id(struct bpf_map *map, bool do_idr_lock);
1622
1623	struct bpf_map_value_off_desc *bpf_map_kptr_off_contains(struct bpf_map *map, u32 offset);
1624	void bpf_map_free_kptr_off_tab(struct bpf_map *map);
1625	struct bpf_map_value_off *bpf_map_copy_kptr_off_tab(const struct bpf_map *map);
1626	bool bpf_map_equal_kptr_off_tab(const struct bpf_map *map_a, const struct bpf_map *map_b);
1627	void bpf_map_free_kptrs(struct bpf_map *map, void *map_value);
1628
1629	struct bpf_map *bpf_map_get(u32 ufd);
1630	struct bpf_map *bpf_map_get_with_uref(u32 ufd);
1631	struct bpf_map *__bpf_map_get(struct fd f);
1632	void bpf_map_inc(struct bpf_map *map);
1633	void bpf_map_inc_with_uref(struct bpf_map *map);
1634	struct bpf_map * __must_check bpf_map_inc_not_zero(struct bpf_map *map);
1635	void bpf_map_put_with_uref(struct bpf_map *map);
1636	void bpf_map_put(struct bpf_map *map);
1637	void *bpf_map_area_alloc(u64 size, int numa_node);
1638	void *bpf_map_area_mmapable_alloc(u64 size, int numa_node);
1639	void bpf_map_area_free(void *base);
1640	bool bpf_map_write_active(const struct bpf_map *map);
1641	void bpf_map_init_from_attr(struct bpf_map *map, union bpf_attr *attr);
1642	int generic_map_lookup_batch(struct bpf_map *map,
1643	const union bpf_attr *attr,
1644	union bpf_attr __user *uattr);
1645	int generic_map_update_batch(struct bpf_map *map,
1646	const union bpf_attr *attr,
1647	union bpf_attr __user *uattr);
1648	int generic_map_delete_batch(struct bpf_map *map,
1649	const union bpf_attr *attr,
1650	union bpf_attr __user *uattr);
1651	struct bpf_map *bpf_map_get_curr_or_next(u32 *id);
1652	struct bpf_prog *bpf_prog_get_curr_or_next(u32 *id);
1653
1654	#ifdef CONFIG_MEMCG_KMEM
1655	void *bpf_map_kmalloc_node(const struct bpf_map *map, size_t size, gfp_t flags,
1656	int node);
1657	void *bpf_map_kzalloc(const struct bpf_map *map, size_t size, gfp_t flags);
1658	void __percpu *bpf_map_alloc_percpu(const struct bpf_map *map, size_t size,
1659	size_t align, gfp_t flags);
1660	#else
1661	static inline void *
1662	bpf_map_kmalloc_node(const struct bpf_map *map, size_t size, gfp_t flags,
1663	int node)
1664	{
1665	return kmalloc_node(size, flags, node);
1666	}
1667
1668	static inline void *
1669	bpf_map_kzalloc(const struct bpf_map *map, size_t size, gfp_t flags)
1670	{
1671	return kzalloc(size, flags);
1672	}
1673
1674	static inline void __percpu *
1675	bpf_map_alloc_percpu(const struct bpf_map *map, size_t size, size_t align,
1676	gfp_t flags)
1677	{
1678	return __alloc_percpu_gfp(size, align, flags);
1679	}
1680	#endif
1681
1682	extern int sysctl_unprivileged_bpf_disabled;
1683
1684	static inline bool bpf_allow_ptr_leaks(void)
1685	{
1686	return perfmon_capable();
1687	}
1688
1689	static inline bool bpf_allow_uninit_stack(void)
1690	{
1691	return perfmon_capable();
1692	}
1693
1694	static inline bool bpf_allow_ptr_to_map_access(void)
1695	{
1696	return perfmon_capable();
1697	}
1698
1699	static inline bool bpf_bypass_spec_v1(void)
1700	{
1701	return perfmon_capable();
1702	}
1703
1704	static inline bool bpf_bypass_spec_v4(void)
1705	{
1706	return perfmon_capable();
1707	}
1708
1709	int bpf_map_new_fd(struct bpf_map *map, int flags);
1710	int bpf_prog_new_fd(struct bpf_prog *prog);
1711
1712	void bpf_link_init(struct bpf_link *link, enum bpf_link_type type,
1713	const struct bpf_link_ops *ops, struct bpf_prog *prog);
1714	int bpf_link_prime(struct bpf_link *link, struct bpf_link_primer *primer);
1715	int bpf_link_settle(struct bpf_link_primer *primer);
1716	void bpf_link_cleanup(struct bpf_link_primer *primer);
1717	void bpf_link_inc(struct bpf_link *link);
1718	void bpf_link_put(struct bpf_link *link);
1719	int bpf_link_new_fd(struct bpf_link *link);
1720	struct file *bpf_link_new_file(struct bpf_link *link, int *reserved_fd);
1721	struct bpf_link *bpf_link_get_from_fd(u32 ufd);
1722	struct bpf_link *bpf_link_get_curr_or_next(u32 *id);
1723
1724	int bpf_obj_pin_user(u32 ufd, const char __user *pathname);
1725	int bpf_obj_get_user(const char __user *pathname, int flags);
1726
1727	#define BPF_ITER_FUNC_PREFIX "bpf_iter_"
1728	#define DEFINE_BPF_ITER_FUNC(target, args...) \
1729	extern int bpf_iter_ ## target(args); \
1730	int __init bpf_iter_ ## target(args) { return 0; }
1731
1732	struct bpf_iter_aux_info {
1733	struct bpf_map *map;
1734	};
1735
1736	typedef int (*bpf_iter_attach_target_t)(struct bpf_prog *prog,
1737	union bpf_iter_link_info *linfo,
1738	struct bpf_iter_aux_info *aux);
1739	typedef void (*bpf_iter_detach_target_t)(struct bpf_iter_aux_info *aux);
1740	typedef void (*bpf_iter_show_fdinfo_t) (const struct bpf_iter_aux_info *aux,
1741	struct seq_file *seq);
1742	typedef int (*bpf_iter_fill_link_info_t)(const struct bpf_iter_aux_info *aux,
1743	struct bpf_link_info *info);
1744	typedef const struct bpf_func_proto *
1745	(*bpf_iter_get_func_proto_t)(enum bpf_func_id func_id,
1746	const struct bpf_prog *prog);
1747
1748	enum bpf_iter_feature {
1749	BPF_ITER_RESCHED = BIT(0),
1750	};
1751
1752	#define BPF_ITER_CTX_ARG_MAX 2
1753	struct bpf_iter_reg {
1754	const char *target;
1755	bpf_iter_attach_target_t attach_target;
1756	bpf_iter_detach_target_t detach_target;
1757	bpf_iter_show_fdinfo_t show_fdinfo;
1758	bpf_iter_fill_link_info_t fill_link_info;
1759	bpf_iter_get_func_proto_t get_func_proto;
1760	u32 ctx_arg_info_size;
1761	u32 feature;
1762	struct bpf_ctx_arg_aux ctx_arg_info[BPF_ITER_CTX_ARG_MAX];
1763	const struct bpf_iter_seq_info *seq_info;
1764	};
1765
1766	struct bpf_iter_meta {
1767	__bpf_md_ptr(struct seq_file *, seq);
1768	u64 session_id;
1769	u64 seq_num;
1770	};
1771
1772	struct bpf_iter__bpf_map_elem {
1773	__bpf_md_ptr(struct bpf_iter_meta *, meta);
1774	__bpf_md_ptr(struct bpf_map *, map);
1775	__bpf_md_ptr(void *, key);
1776	__bpf_md_ptr(void *, value);
1777	};
1778
1779	int bpf_iter_reg_target(const struct bpf_iter_reg *reg_info);
1780	void bpf_iter_unreg_target(const struct bpf_iter_reg *reg_info);
1781	bool bpf_iter_prog_supported(struct bpf_prog *prog);
1782	const struct bpf_func_proto *
1783	bpf_iter_get_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog);
1784	int bpf_iter_link_attach(const union bpf_attr *attr, bpfptr_t uattr, struct bpf_prog *prog);
1785	int bpf_iter_new_fd(struct bpf_link *link);
1786	bool bpf_link_is_iter(struct bpf_link *link);
1787	struct bpf_prog *bpf_iter_get_info(struct bpf_iter_meta *meta, bool in_stop);
1788	int bpf_iter_run_prog(struct bpf_prog *prog, void *ctx);
1789	void bpf_iter_map_show_fdinfo(const struct bpf_iter_aux_info *aux,
1790	struct seq_file *seq);
1791	int bpf_iter_map_fill_link_info(const struct bpf_iter_aux_info *aux,
1792	struct bpf_link_info *info);
1793
1794	int map_set_for_each_callback_args(struct bpf_verifier_env *env,
1795	struct bpf_func_state *caller,
1796	struct bpf_func_state *callee);
1797
1798	int bpf_percpu_hash_copy(struct bpf_map *map, void *key, void *value);
1799	int bpf_percpu_array_copy(struct bpf_map *map, void *key, void *value);
1800	int bpf_percpu_hash_update(struct bpf_map *map, void *key, void *value,
1801	u64 flags);
1802	int bpf_percpu_array_update(struct bpf_map *map, void *key, void *value,
1803	u64 flags);
1804
1805	int bpf_stackmap_copy(struct bpf_map *map, void *key, void *value);
1806
1807	int bpf_fd_array_map_update_elem(struct bpf_map *map, struct file *map_file,
1808	void *key, void *value, u64 map_flags);
1809	int bpf_fd_array_map_lookup_elem(struct bpf_map *map, void *key, u32 *value);
1810	int bpf_fd_htab_map_update_elem(struct bpf_map *map, struct file *map_file,
1811	void *key, void *value, u64 map_flags);
1812	int bpf_fd_htab_map_lookup_elem(struct bpf_map *map, void *key, u32 *value);
1813
1814	int bpf_get_file_flag(int flags);
1815	int bpf_check_uarg_tail_zero(bpfptr_t uaddr, size_t expected_size,
1816	size_t actual_size);
1817
1818	/* memcpy that is used with 8-byte aligned pointers, power-of-8 size and
1819	* forced to use 'long' read/writes to try to atomically copy long counters.
1820	* Best-effort only. No barriers here, since it _will_ race with concurrent
1821	* updates from BPF programs. Called from bpf syscall and mostly used with
1822	* size 8 or 16 bytes, so ask compiler to inline it.
1823	*/
1824	static inline void bpf_long_memcpy(void *dst, const void *src, u32 size)
1825	{
1826	const long *lsrc = src;
1827	long *ldst = dst;
1828
1829	size /= sizeof(long);
1830	while (size--)
1831	*ldst++ = *lsrc++;
1832	}
1833
1834	/* verify correctness of eBPF program */
1835	int bpf_check(struct bpf_prog **fp, union bpf_attr *attr, bpfptr_t uattr);
1836
1837	#ifndef CONFIG_BPF_JIT_ALWAYS_ON
1838	void bpf_patch_call_args(struct bpf_insn *insn, u32 stack_depth);
1839	#endif
1840
1841	struct btf *bpf_get_btf_vmlinux(void);
1842
1843	/* Map specifics */
1844	struct xdp_frame;
1845	struct sk_buff;
1846	struct bpf_dtab_netdev;
1847	struct bpf_cpu_map_entry;
1848
1849	void __dev_flush(void);
1850	int dev_xdp_enqueue(struct net_device *dev, struct xdp_frame *xdpf,
1851	struct net_device *dev_rx);
1852	int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_frame *xdpf,
1853	struct net_device *dev_rx);
1854	int dev_map_enqueue_multi(struct xdp_frame *xdpf, struct net_device *dev_rx,
1855	struct bpf_map *map, bool exclude_ingress);
1856	int dev_map_generic_redirect(struct bpf_dtab_netdev *dst, struct sk_buff *skb,
1857	struct bpf_prog *xdp_prog);
1858	int dev_map_redirect_multi(struct net_device *dev, struct sk_buff *skb,
1859	struct bpf_prog *xdp_prog, struct bpf_map *map,
1860	bool exclude_ingress);
1861
1862	void __cpu_map_flush(void);
1863	int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu, struct xdp_frame *xdpf,
1864	struct net_device *dev_rx);
1865	int cpu_map_generic_redirect(struct bpf_cpu_map_entry *rcpu,
1866	struct sk_buff *skb);
1867
1868	/* Return map's numa specified by userspace */
1869	static inline int bpf_map_attr_numa_node(const union bpf_attr *attr)
1870	{
1871	return (attr->map_flags & BPF_F_NUMA_NODE) ?
1872	attr->numa_node : NUMA_NO_NODE;
1873	}
1874
1875	struct bpf_prog *bpf_prog_get_type_path(const char *name, enum bpf_prog_type type);
1876	int array_map_alloc_check(union bpf_attr *attr);
1877
1878	int bpf_prog_test_run_xdp(struct bpf_prog *prog, const union bpf_attr *kattr,
1879	union bpf_attr __user *uattr);
1880	int bpf_prog_test_run_skb(struct bpf_prog *prog, const union bpf_attr *kattr,
1881	union bpf_attr __user *uattr);
1882	int bpf_prog_test_run_tracing(struct bpf_prog *prog,
1883	const union bpf_attr *kattr,
1884	union bpf_attr __user *uattr);
1885	int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog,
1886	const union bpf_attr *kattr,
1887	union bpf_attr __user *uattr);
1888	int bpf_prog_test_run_raw_tp(struct bpf_prog *prog,
1889	const union bpf_attr *kattr,
1890	union bpf_attr __user *uattr);
1891	int bpf_prog_test_run_sk_lookup(struct bpf_prog *prog,
1892	const union bpf_attr *kattr,
1893	union bpf_attr __user *uattr);
1894	bool btf_ctx_access(int off, int size, enum bpf_access_type type,
1895	const struct bpf_prog *prog,
1896	struct bpf_insn_access_aux *info);
1897
1898	static inline bool bpf_tracing_ctx_access(int off, int size,
1899	enum bpf_access_type type)
1900	{
1901	if (off < 0 || off >= sizeof(__u64) * MAX_BPF_FUNC_ARGS)
1902	return false;
1903	if (type != BPF_READ)
1904	return false;
1905	if (off % size != 0)
1906	return false;
1907	return true;
1908	}
1909
1910	static inline bool bpf_tracing_btf_ctx_access(int off, int size,
1911	enum bpf_access_type type,
1912	const struct bpf_prog *prog,
1913	struct bpf_insn_access_aux *info)
1914	{
1915	if (!bpf_tracing_ctx_access(off, size, type))
1916	return false;
1917	return btf_ctx_access(off, size, type, prog, info);
1918	}
1919
1920	int btf_struct_access(struct bpf_verifier_log *log, const struct btf *btf,
1921	const struct btf_type *t, int off, int size,
1922	enum bpf_access_type atype,
1923	u32 *next_btf_id, enum bpf_type_flag *flag);
1924	bool btf_struct_ids_match(struct bpf_verifier_log *log,
1925	const struct btf *btf, u32 id, int off,
1926	const struct btf *need_btf, u32 need_type_id,
1927	bool strict);
1928
1929	int btf_distill_func_proto(struct bpf_verifier_log *log,
1930	struct btf *btf,
1931	const struct btf_type *func_proto,
1932	const char *func_name,
1933	struct btf_func_model *m);
1934
1935	struct bpf_reg_state;
1936	int btf_check_subprog_arg_match(struct bpf_verifier_env *env, int subprog,
1937	struct bpf_reg_state *regs);
1938	int btf_check_kfunc_arg_match(struct bpf_verifier_env *env,
1939	const struct btf *btf, u32 func_id,
1940	struct bpf_reg_state *regs,
1941	u32 kfunc_flags);
1942	int btf_prepare_func_args(struct bpf_verifier_env *env, int subprog,
1943	struct bpf_reg_state *reg);
1944	int btf_check_type_match(struct bpf_verifier_log *log, const struct bpf_prog *prog,
1945	struct btf *btf, const struct btf_type *t);
1946
1947	struct bpf_prog *bpf_prog_by_id(u32 id);
1948	struct bpf_link *bpf_link_by_id(u32 id);
1949
1950	const struct bpf_func_proto *bpf_base_func_proto(enum bpf_func_id func_id);
1951	void bpf_task_storage_free(struct task_struct *task);
1952	bool bpf_prog_has_kfunc_call(const struct bpf_prog *prog);
1953	const struct btf_func_model *
1954	bpf_jit_find_kfunc_model(const struct bpf_prog *prog,
1955	const struct bpf_insn *insn);
1956	struct bpf_core_ctx {
1957	struct bpf_verifier_log *log;
1958	const struct btf *btf;
1959	};
1960
1961	int bpf_core_apply(struct bpf_core_ctx *ctx, const struct bpf_core_relo *relo,
1962	int relo_idx, void *insn);
1963
1964	static inline bool unprivileged_ebpf_enabled(void)
1965	{
1966	return !sysctl_unprivileged_bpf_disabled;
1967	}
1968
1969	#else /* !CONFIG_BPF_SYSCALL */
1970	static inline struct bpf_prog *bpf_prog_get(u32 ufd)
1971	{
1972	return ERR_PTR(-EOPNOTSUPP);
1973	}
1974
1975	static inline struct bpf_prog *bpf_prog_get_type_dev(u32 ufd,
1976	enum bpf_prog_type type,
1977	bool attach_drv)
1978	{
1979	return ERR_PTR(-EOPNOTSUPP);
1980	}
1981
1982	static inline void bpf_prog_add(struct bpf_prog *prog, int i)
1983	{
1984	}
1985
1986	static inline void bpf_prog_sub(struct bpf_prog *prog, int i)
1987	{
1988	}
1989
1990	static inline void bpf_prog_put(struct bpf_prog *prog)
1991	{
1992	}
1993
1994	static inline void bpf_prog_inc(struct bpf_prog *prog)
1995	{
1996	}
1997
1998	static inline struct bpf_prog *__must_check
1999	bpf_prog_inc_not_zero(struct bpf_prog *prog)
2000	{
2001	return ERR_PTR(-EOPNOTSUPP);
2002	}
2003
2004	static inline void bpf_link_init(struct bpf_link *link, enum bpf_link_type type,
2005	const struct bpf_link_ops *ops,
2006	struct bpf_prog *prog)
2007	{
2008	}
2009
2010	static inline int bpf_link_prime(struct bpf_link *link,
2011	struct bpf_link_primer *primer)
2012	{
2013	return -EOPNOTSUPP;
2014	}
2015
2016	static inline int bpf_link_settle(struct bpf_link_primer *primer)
2017	{
2018	return -EOPNOTSUPP;
2019	}
2020
2021	static inline void bpf_link_cleanup(struct bpf_link_primer *primer)
2022	{
2023	}
2024
2025	static inline void bpf_link_inc(struct bpf_link *link)
2026	{
2027	}
2028
2029	static inline void bpf_link_put(struct bpf_link *link)
2030	{
2031	}
2032
2033	static inline int bpf_obj_get_user(const char __user *pathname, int flags)
2034	{
2035	return -EOPNOTSUPP;
2036	}
2037
2038	static inline void __dev_flush(void)
2039	{
2040	}
2041
2042	struct xdp_frame;
2043	struct bpf_dtab_netdev;
2044	struct bpf_cpu_map_entry;
2045
2046	static inline
2047	int dev_xdp_enqueue(struct net_device *dev, struct xdp_frame *xdpf,
2048	struct net_device *dev_rx)
2049	{
2050	return 0;
2051	}
2052
2053	static inline
2054	int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_frame *xdpf,
2055	struct net_device *dev_rx)
2056	{
2057	return 0;
2058	}
2059
2060	static inline
2061	int dev_map_enqueue_multi(struct xdp_frame *xdpf, struct net_device *dev_rx,
2062	struct bpf_map *map, bool exclude_ingress)
2063	{
2064	return 0;
2065	}
2066
2067	struct sk_buff;
2068
2069	static inline int dev_map_generic_redirect(struct bpf_dtab_netdev *dst,
2070	struct sk_buff *skb,
2071	struct bpf_prog *xdp_prog)
2072	{
2073	return 0;
2074	}
2075
2076	static inline
2077	int dev_map_redirect_multi(struct net_device *dev, struct sk_buff *skb,
2078	struct bpf_prog *xdp_prog, struct bpf_map *map,
2079	bool exclude_ingress)
2080	{
2081	return 0;
2082	}
2083
2084	static inline void __cpu_map_flush(void)
2085	{
2086	}
2087
2088	static inline int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu,
2089	struct xdp_frame *xdpf,
2090	struct net_device *dev_rx)
2091	{
2092	return 0;
2093	}
2094
2095	static inline int cpu_map_generic_redirect(struct bpf_cpu_map_entry *rcpu,
2096	struct sk_buff *skb)
2097	{
2098	return -EOPNOTSUPP;
2099	}
2100
2101	static inline struct bpf_prog *bpf_prog_get_type_path(const char *name,
2102	enum bpf_prog_type type)
2103	{
2104	return ERR_PTR(-EOPNOTSUPP);
2105	}
2106
2107	static inline int bpf_prog_test_run_xdp(struct bpf_prog *prog,
2108	const union bpf_attr *kattr,
2109	union bpf_attr __user *uattr)
2110	{
2111	return -ENOTSUPP;
2112	}
2113
2114	static inline int bpf_prog_test_run_skb(struct bpf_prog *prog,
2115	const union bpf_attr *kattr,
2116	union bpf_attr __user *uattr)
2117	{
2118	return -ENOTSUPP;
2119	}
2120
2121	static inline int bpf_prog_test_run_tracing(struct bpf_prog *prog,
2122	const union bpf_attr *kattr,
2123	union bpf_attr __user *uattr)
2124	{
2125	return -ENOTSUPP;
2126	}
2127
2128	static inline int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog,
2129	const union bpf_attr *kattr,
2130	union bpf_attr __user *uattr)
2131	{
2132	return -ENOTSUPP;
2133	}
2134
2135	static inline int bpf_prog_test_run_sk_lookup(struct bpf_prog *prog,
2136	const union bpf_attr *kattr,
2137	union bpf_attr __user *uattr)
2138	{
2139	return -ENOTSUPP;
2140	}
2141
2142	static inline void bpf_map_put(struct bpf_map *map)
2143	{
2144	}
2145
2146	static inline struct bpf_prog *bpf_prog_by_id(u32 id)
2147	{
2148	return ERR_PTR(-ENOTSUPP);
2149	}
2150
2151	static inline const struct bpf_func_proto *
2152	bpf_base_func_proto(enum bpf_func_id func_id)
2153	{
2154	return NULL;
2155	}
2156
2157	static inline void bpf_task_storage_free(struct task_struct *task)
2158	{
2159	}
2160
2161	static inline bool bpf_prog_has_kfunc_call(const struct bpf_prog *prog)
2162	{
2163	return false;
2164	}
2165
2166	static inline const struct btf_func_model *
2167	bpf_jit_find_kfunc_model(const struct bpf_prog *prog,
2168	const struct bpf_insn *insn)
2169	{
2170	return NULL;
2171	}
2172
2173	static inline bool unprivileged_ebpf_enabled(void)
2174	{
2175	return false;
2176	}
2177
2178	#endif /* CONFIG_BPF_SYSCALL */
2179
2180	void __bpf_free_used_btfs(struct bpf_prog_aux *aux,
2181	struct btf_mod_pair *used_btfs, u32 len);
2182
2183	static inline struct bpf_prog *bpf_prog_get_type(u32 ufd,
2184	enum bpf_prog_type type)
2185	{
2186	return bpf_prog_get_type_dev(ufd, type, false);
2187	}
2188
2189	void __bpf_free_used_maps(struct bpf_prog_aux *aux,
2190	struct bpf_map **used_maps, u32 len);
2191
2192	bool bpf_prog_get_ok(struct bpf_prog *, enum bpf_prog_type *, bool);
2193
2194	int bpf_prog_offload_compile(struct bpf_prog *prog);
2195	void bpf_prog_offload_destroy(struct bpf_prog *prog);
2196	int bpf_prog_offload_info_fill(struct bpf_prog_info *info,
2197	struct bpf_prog *prog);
2198
2199	int bpf_map_offload_info_fill(struct bpf_map_info *info, struct bpf_map *map);
2200
2201	int bpf_map_offload_lookup_elem(struct bpf_map *map, void *key, void *value);
2202	int bpf_map_offload_update_elem(struct bpf_map *map,
2203	void *key, void *value, u64 flags);
2204	int bpf_map_offload_delete_elem(struct bpf_map *map, void *key);
2205	int bpf_map_offload_get_next_key(struct bpf_map *map,
2206	void *key, void *next_key);
2207
2208	bool bpf_offload_prog_map_match(struct bpf_prog *prog, struct bpf_map *map);
2209
2210	struct bpf_offload_dev *
2211	bpf_offload_dev_create(const struct bpf_prog_offload_ops *ops, void *priv);
2212	void bpf_offload_dev_destroy(struct bpf_offload_dev *offdev);
2213	void *bpf_offload_dev_priv(struct bpf_offload_dev *offdev);
2214	int bpf_offload_dev_netdev_register(struct bpf_offload_dev *offdev,
2215	struct net_device *netdev);
2216	void bpf_offload_dev_netdev_unregister(struct bpf_offload_dev *offdev,
2217	struct net_device *netdev);
2218	bool bpf_offload_dev_match(struct bpf_prog *prog, struct net_device *netdev);
2219
2220	void unpriv_ebpf_notify(int new_state);
2221
2222	#if defined(CONFIG_NET) && defined(CONFIG_BPF_SYSCALL)
2223	int bpf_prog_offload_init(struct bpf_prog *prog, union bpf_attr *attr);
2224
2225	static inline bool bpf_prog_is_dev_bound(const struct bpf_prog_aux *aux)
2226	{
2227	return aux->offload_requested;
2228	}
2229
2230	static inline bool bpf_map_is_dev_bound(struct bpf_map *map)
2231	{
2232	return unlikely(map->ops == &bpf_map_offload_ops);
2233	}
2234
2235	struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr);
2236	void bpf_map_offload_map_free(struct bpf_map *map);
2237	int bpf_prog_test_run_syscall(struct bpf_prog *prog,
2238	const union bpf_attr *kattr,
2239	union bpf_attr __user *uattr);
2240
2241	int sock_map_get_from_fd(const union bpf_attr *attr, struct bpf_prog *prog);
2242	int sock_map_prog_detach(const union bpf_attr *attr, enum bpf_prog_type ptype);
2243	int sock_map_update_elem_sys(struct bpf_map *map, void *key, void *value, u64 flags);
2244	int sock_map_bpf_prog_query(const union bpf_attr *attr,
2245	union bpf_attr __user *uattr);
2246
2247	void sock_map_unhash(struct sock *sk);
2248	void sock_map_destroy(struct sock *sk);
2249	void sock_map_close(struct sock *sk, long timeout);
2250	#else
2251	static inline int bpf_prog_offload_init(struct bpf_prog *prog,
2252	union bpf_attr *attr)
2253	{
2254	return -EOPNOTSUPP;
2255	}
2256
2257	static inline bool bpf_prog_is_dev_bound(struct bpf_prog_aux *aux)
2258	{
2259	return false;
2260	}
2261
2262	static inline bool bpf_map_is_dev_bound(struct bpf_map *map)
2263	{
2264	return false;
2265	}
2266
2267	static inline struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr)
2268	{
2269	return ERR_PTR(-EOPNOTSUPP);
2270	}
2271
2272	static inline void bpf_map_offload_map_free(struct bpf_map *map)
2273	{
2274	}
2275
2276	static inline int bpf_prog_test_run_syscall(struct bpf_prog *prog,
2277	const union bpf_attr *kattr,
2278	union bpf_attr __user *uattr)
2279	{
2280	return -ENOTSUPP;
2281	}
2282
2283	#ifdef CONFIG_BPF_SYSCALL
2284	static inline int sock_map_get_from_fd(const union bpf_attr *attr,
2285	struct bpf_prog *prog)
2286	{
2287	return -EINVAL;
2288	}
2289
2290	static inline int sock_map_prog_detach(const union bpf_attr *attr,
2291	enum bpf_prog_type ptype)
2292	{
2293	return -EOPNOTSUPP;
2294	}
2295
2296	static inline int sock_map_update_elem_sys(struct bpf_map *map, void *key, void *value,
2297	u64 flags)
2298	{
2299	return -EOPNOTSUPP;
2300	}
2301
2302	static inline int sock_map_bpf_prog_query(const union bpf_attr *attr,
2303	union bpf_attr __user *uattr)
2304	{
2305	return -EINVAL;
2306	}
2307	#endif /* CONFIG_BPF_SYSCALL */
2308	#endif /* CONFIG_NET && CONFIG_BPF_SYSCALL */
2309
2310	#if defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL)
2311	void bpf_sk_reuseport_detach(struct sock *sk);
2312	int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map, void *key,
2313	void *value);
2314	int bpf_fd_reuseport_array_update_elem(struct bpf_map *map, void *key,
2315	void *value, u64 map_flags);
2316	#else
2317	static inline void bpf_sk_reuseport_detach(struct sock *sk)
2318	{
2319	}
2320
2321	#ifdef CONFIG_BPF_SYSCALL
2322	static inline int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map,
2323	void *key, void *value)
2324	{
2325	return -EOPNOTSUPP;
2326	}
2327
2328	static inline int bpf_fd_reuseport_array_update_elem(struct bpf_map *map,
2329	void *key, void *value,
2330	u64 map_flags)
2331	{
2332	return -EOPNOTSUPP;
2333	}
2334	#endif /* CONFIG_BPF_SYSCALL */
2335	#endif /* defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL) */
2336
2337	/* verifier prototypes for helper functions called from eBPF programs */
2338	extern const struct bpf_func_proto bpf_map_lookup_elem_proto;
2339	extern const struct bpf_func_proto bpf_map_update_elem_proto;
2340	extern const struct bpf_func_proto bpf_map_delete_elem_proto;
2341	extern const struct bpf_func_proto bpf_map_push_elem_proto;
2342	extern const struct bpf_func_proto bpf_map_pop_elem_proto;
2343	extern const struct bpf_func_proto bpf_map_peek_elem_proto;
2344	extern const struct bpf_func_proto bpf_map_lookup_percpu_elem_proto;
2345
2346	extern const struct bpf_func_proto bpf_get_prandom_u32_proto;
2347	extern const struct bpf_func_proto bpf_get_smp_processor_id_proto;
2348	extern const struct bpf_func_proto bpf_get_numa_node_id_proto;
2349	extern const struct bpf_func_proto bpf_tail_call_proto;
2350	extern const struct bpf_func_proto bpf_ktime_get_ns_proto;
2351	extern const struct bpf_func_proto bpf_ktime_get_boot_ns_proto;
2352	extern const struct bpf_func_proto bpf_get_current_pid_tgid_proto;
2353	extern const struct bpf_func_proto bpf_get_current_uid_gid_proto;
2354	extern const struct bpf_func_proto bpf_get_current_comm_proto;
2355	extern const struct bpf_func_proto bpf_get_stackid_proto;
2356	extern const struct bpf_func_proto bpf_get_stack_proto;
2357	extern const struct bpf_func_proto bpf_get_task_stack_proto;
2358	extern const struct bpf_func_proto bpf_get_stackid_proto_pe;
2359	extern const struct bpf_func_proto bpf_get_stack_proto_pe;
2360	extern const struct bpf_func_proto bpf_sock_map_update_proto;
2361	extern const struct bpf_func_proto bpf_sock_hash_update_proto;
2362	extern const struct bpf_func_proto bpf_get_current_cgroup_id_proto;
2363	extern const struct bpf_func_proto bpf_get_current_ancestor_cgroup_id_proto;
2364	extern const struct bpf_func_proto bpf_msg_redirect_hash_proto;
2365	extern const struct bpf_func_proto bpf_msg_redirect_map_proto;
2366	extern const struct bpf_func_proto bpf_sk_redirect_hash_proto;
2367	extern const struct bpf_func_proto bpf_sk_redirect_map_proto;
2368	extern const struct bpf_func_proto bpf_spin_lock_proto;
2369	extern const struct bpf_func_proto bpf_spin_unlock_proto;
2370	extern const struct bpf_func_proto bpf_get_local_storage_proto;
2371	extern const struct bpf_func_proto bpf_strtol_proto;
2372	extern const struct bpf_func_proto bpf_strtoul_proto;
2373	extern const struct bpf_func_proto bpf_tcp_sock_proto;
2374	extern const struct bpf_func_proto bpf_jiffies64_proto;
2375	extern const struct bpf_func_proto bpf_get_ns_current_pid_tgid_proto;
2376	extern const struct bpf_func_proto bpf_event_output_data_proto;
2377	extern const struct bpf_func_proto bpf_ringbuf_output_proto;
2378	extern const struct bpf_func_proto bpf_ringbuf_reserve_proto;
2379	extern const struct bpf_func_proto bpf_ringbuf_submit_proto;
2380	extern const struct bpf_func_proto bpf_ringbuf_discard_proto;
2381	extern const struct bpf_func_proto bpf_ringbuf_query_proto;
2382	extern const struct bpf_func_proto bpf_ringbuf_reserve_dynptr_proto;
2383	extern const struct bpf_func_proto bpf_ringbuf_submit_dynptr_proto;
2384	extern const struct bpf_func_proto bpf_ringbuf_discard_dynptr_proto;
2385	extern const struct bpf_func_proto bpf_skc_to_tcp6_sock_proto;
2386	extern const struct bpf_func_proto bpf_skc_to_tcp_sock_proto;
2387	extern const struct bpf_func_proto bpf_skc_to_tcp_timewait_sock_proto;
2388	extern const struct bpf_func_proto bpf_skc_to_tcp_request_sock_proto;
2389	extern const struct bpf_func_proto bpf_skc_to_udp6_sock_proto;
2390	extern const struct bpf_func_proto bpf_skc_to_unix_sock_proto;
2391	extern const struct bpf_func_proto bpf_skc_to_mptcp_sock_proto;
2392	extern const struct bpf_func_proto bpf_copy_from_user_proto;
2393	extern const struct bpf_func_proto bpf_snprintf_btf_proto;
2394	extern const struct bpf_func_proto bpf_snprintf_proto;
2395	extern const struct bpf_func_proto bpf_per_cpu_ptr_proto;
2396	extern const struct bpf_func_proto bpf_this_cpu_ptr_proto;
2397	extern const struct bpf_func_proto bpf_ktime_get_coarse_ns_proto;
2398	extern const struct bpf_func_proto bpf_sock_from_file_proto;
2399	extern const struct bpf_func_proto bpf_get_socket_ptr_cookie_proto;
2400	extern const struct bpf_func_proto bpf_task_storage_get_proto;
2401	extern const struct bpf_func_proto bpf_task_storage_delete_proto;
2402	extern const struct bpf_func_proto bpf_for_each_map_elem_proto;
2403	extern const struct bpf_func_proto bpf_btf_find_by_name_kind_proto;
2404	extern const struct bpf_func_proto bpf_sk_setsockopt_proto;
2405	extern const struct bpf_func_proto bpf_sk_getsockopt_proto;
2406	extern const struct bpf_func_proto bpf_unlocked_sk_setsockopt_proto;
2407	extern const struct bpf_func_proto bpf_unlocked_sk_getsockopt_proto;
2408	extern const struct bpf_func_proto bpf_find_vma_proto;
2409	extern const struct bpf_func_proto bpf_loop_proto;
2410	extern const struct bpf_func_proto bpf_copy_from_user_task_proto;
2411	extern const struct bpf_func_proto bpf_set_retval_proto;
2412	extern const struct bpf_func_proto bpf_get_retval_proto;
2413
2414	const struct bpf_func_proto *tracing_prog_func_proto(
2415	enum bpf_func_id func_id, const struct bpf_prog *prog);
2416
2417	/* Shared helpers among cBPF and eBPF. */
2418	void bpf_user_rnd_init_once(void);
2419	u64 bpf_user_rnd_u32(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
2420	u64 bpf_get_raw_cpu_id(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
2421
2422	#if defined(CONFIG_NET)
2423	bool bpf_sock_common_is_valid_access(int off, int size,
2424	enum bpf_access_type type,
2425	struct bpf_insn_access_aux *info);
2426	bool bpf_sock_is_valid_access(int off, int size, enum bpf_access_type type,
2427	struct bpf_insn_access_aux *info);
2428	u32 bpf_sock_convert_ctx_access(enum bpf_access_type type,
2429	const struct bpf_insn *si,
2430	struct bpf_insn *insn_buf,
2431	struct bpf_prog *prog,
2432	u32 *target_size);
2433	#else
2434	static inline bool bpf_sock_common_is_valid_access(int off, int size,
2435	enum bpf_access_type type,
2436	struct bpf_insn_access_aux *info)
2437	{
2438	return false;
2439	}
2440	static inline bool bpf_sock_is_valid_access(int off, int size,
2441	enum bpf_access_type type,
2442	struct bpf_insn_access_aux *info)
2443	{
2444	return false;
2445	}
2446	static inline u32 bpf_sock_convert_ctx_access(enum bpf_access_type type,
2447	const struct bpf_insn *si,
2448	struct bpf_insn *insn_buf,
2449	struct bpf_prog *prog,
2450	u32 *target_size)
2451	{
2452	return 0;
2453	}
2454	#endif
2455
2456	#ifdef CONFIG_INET
2457	struct sk_reuseport_kern {
2458	struct sk_buff *skb;
2459	struct sock *sk;
2460	struct sock *selected_sk;
2461	struct sock *migrating_sk;
2462	void *data_end;
2463	u32 hash;
2464	u32 reuseport_id;
2465	bool bind_inany;
2466	};
2467	bool bpf_tcp_sock_is_valid_access(int off, int size, enum bpf_access_type type,
2468	struct bpf_insn_access_aux *info);
2469
2470	u32 bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type,
2471	const struct bpf_insn *si,
2472	struct bpf_insn *insn_buf,
2473	struct bpf_prog *prog,
2474	u32 *target_size);
2475
2476	bool bpf_xdp_sock_is_valid_access(int off, int size, enum bpf_access_type type,
2477	struct bpf_insn_access_aux *info);
2478
2479	u32 bpf_xdp_sock_convert_ctx_access(enum bpf_access_type type,
2480	const struct bpf_insn *si,
2481	struct bpf_insn *insn_buf,
2482	struct bpf_prog *prog,
2483	u32 *target_size);
2484	#else
2485	static inline bool bpf_tcp_sock_is_valid_access(int off, int size,
2486	enum bpf_access_type type,
2487	struct bpf_insn_access_aux *info)
2488	{
2489	return false;
2490	}
2491
2492	static inline u32 bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type,
2493	const struct bpf_insn *si,
2494	struct bpf_insn *insn_buf,
2495	struct bpf_prog *prog,
2496	u32 *target_size)
2497	{
2498	return 0;
2499	}
2500	static inline bool bpf_xdp_sock_is_valid_access(int off, int size,
2501	enum bpf_access_type type,
2502	struct bpf_insn_access_aux *info)
2503	{
2504	return false;
2505	}
2506
2507	static inline u32 bpf_xdp_sock_convert_ctx_access(enum bpf_access_type type,
2508	const struct bpf_insn *si,
2509	struct bpf_insn *insn_buf,
2510	struct bpf_prog *prog,
2511	u32 *target_size)
2512	{
2513	return 0;
2514	}
2515	#endif /* CONFIG_INET */
2516
2517	enum bpf_text_poke_type {
2518	BPF_MOD_CALL,
2519	BPF_MOD_JUMP,
2520	};
2521
2522	int bpf_arch_text_poke(void *ip, enum bpf_text_poke_type t,
2523	void *addr1, void *addr2);
2524
2525	void *bpf_arch_text_copy(void *dst, void *src, size_t len);
2526	int bpf_arch_text_invalidate(void *dst, size_t len);
2527
2528	struct btf_id_set;
2529	bool btf_id_set_contains(const struct btf_id_set *set, u32 id);
2530
2531	#define MAX_BPRINTF_VARARGS 12
2532
2533	int bpf_bprintf_prepare(char *fmt, u32 fmt_size, const u64 *raw_args,
2534	u32 **bin_buf, u32 num_args);
2535	void bpf_bprintf_cleanup(void);
2536
2537	/* the implementation of the opaque uapi struct bpf_dynptr */
2538	struct bpf_dynptr_kern {
2539	void *data;
2540	/* Size represents the number of usable bytes of dynptr data.
2541	* If for example the offset is at 4 for a local dynptr whose data is
2542	* of type u64, the number of usable bytes is 4.
2543	*
2544	* The upper 8 bits are reserved. It is as follows:
2545	* Bits 0 - 23 = size
2546	* Bits 24 - 30 = dynptr type
2547	* Bit 31 = whether dynptr is read-only
2548	*/
2549	u32 size;
2550	u32 offset;
2551	} __aligned(8);
2552
2553	enum bpf_dynptr_type {
2554	BPF_DYNPTR_TYPE_INVALID,
2555	/* Points to memory that is local to the bpf program */
2556	BPF_DYNPTR_TYPE_LOCAL,
2557	/* Underlying data is a ringbuf record */
2558	BPF_DYNPTR_TYPE_RINGBUF,
2559	};
2560
2561	void bpf_dynptr_init(struct bpf_dynptr_kern *ptr, void *data,
2562	enum bpf_dynptr_type type, u32 offset, u32 size);
2563	void bpf_dynptr_set_null(struct bpf_dynptr_kern *ptr);
2564	int bpf_dynptr_check_size(u32 size);
2565
2566	#ifdef CONFIG_BPF_LSM
2567	void bpf_cgroup_atype_get(u32 attach_btf_id, int cgroup_atype);
2568	void bpf_cgroup_atype_put(int cgroup_atype);
2569	#else
2570	static inline void bpf_cgroup_atype_get(u32 attach_btf_id, int cgroup_atype) {}
2571	static inline void bpf_cgroup_atype_put(int cgroup_atype) {}
2572	#endif /* CONFIG_BPF_LSM */
2573
2574	#endif /* _LINUX_BPF_H */
2575