1/* Copyright (c) 2011-2014 PLUMgrid, http://plumgrid.com
2 *
3 * This program is free software; you can redistribute it and/or
4 * modify it under the terms of version 2 of the GNU General Public
5 * License as published by the Free Software Foundation.
6 */
7#ifndef _LINUX_BPF_H
8#define _LINUX_BPF_H 1
9
10#include <uapi/linux/bpf.h>
11
12#include <linux/workqueue.h>
13#include <linux/file.h>
14#include <linux/percpu.h>
15#include <linux/err.h>
16#include <linux/rbtree_latch.h>
17#include <linux/numa.h>
18#include <linux/wait.h>
19
20struct bpf_verifier_env;
21struct perf_event;
22struct bpf_prog;
23struct bpf_map;
24struct sock;
25struct seq_file;
26struct btf_type;
27
28/* map is generic key/value storage optionally accesible by eBPF programs */
29struct bpf_map_ops {
30 /* funcs callable from userspace (via syscall) */
31 int (*map_alloc_check)(union bpf_attr *attr);
32 struct bpf_map *(*map_alloc)(union bpf_attr *attr);
33 void (*map_release)(struct bpf_map *map, struct file *map_file);
34 void (*map_free)(struct bpf_map *map);
35 int (*map_get_next_key)(struct bpf_map *map, void *key, void *next_key);
36 void (*map_release_uref)(struct bpf_map *map);
37
38 /* funcs callable from userspace and from eBPF programs */
39 void *(*map_lookup_elem)(struct bpf_map *map, void *key);
40 int (*map_update_elem)(struct bpf_map *map, void *key, void *value, u64 flags);
41 int (*map_delete_elem)(struct bpf_map *map, void *key);
42
43 /* funcs called by prog_array and perf_event_array map */
44 void *(*map_fd_get_ptr)(struct bpf_map *map, struct file *map_file,
45 int fd);
46 void (*map_fd_put_ptr)(void *ptr);
47 u32 (*map_gen_lookup)(struct bpf_map *map, struct bpf_insn *insn_buf);
48 u32 (*map_fd_sys_lookup_elem)(void *ptr);
49 void (*map_seq_show_elem)(struct bpf_map *map, void *key,
50 struct seq_file *m);
51 int (*map_check_btf)(const struct bpf_map *map,
52 const struct btf_type *key_type,
53 const struct btf_type *value_type);
54};
55
56struct bpf_map {
57 /* The first two cachelines with read-mostly members of which some
58 * are also accessed in fast-path (e.g. ops, max_entries).
59 */
60 const struct bpf_map_ops *ops ____cacheline_aligned;
61 struct bpf_map *inner_map_meta;
62#ifdef CONFIG_SECURITY
63 void *security;
64#endif
65 enum bpf_map_type map_type;
66 u32 key_size;
67 u32 value_size;
68 u32 max_entries;
69 u32 map_flags;
70 u32 pages;
71 u32 id;
72 int numa_node;
73 u32 btf_key_type_id;
74 u32 btf_value_type_id;
75 struct btf *btf;
76 bool unpriv_array;
77 /* 55 bytes hole */
78
79 /* The 3rd and 4th cacheline with misc members to avoid false sharing
80 * particularly with refcounting.
81 */
82 struct user_struct *user ____cacheline_aligned;
83 atomic_t refcnt;
84 atomic_t usercnt;
85 struct work_struct work;
86 char name[BPF_OBJ_NAME_LEN];
87};
88
89struct bpf_offload_dev;
90struct bpf_offloaded_map;
91
92struct bpf_map_dev_ops {
93 int (*map_get_next_key)(struct bpf_offloaded_map *map,
94 void *key, void *next_key);
95 int (*map_lookup_elem)(struct bpf_offloaded_map *map,
96 void *key, void *value);
97 int (*map_update_elem)(struct bpf_offloaded_map *map,
98 void *key, void *value, u64 flags);
99 int (*map_delete_elem)(struct bpf_offloaded_map *map, void *key);
100};
101
102struct bpf_offloaded_map {
103 struct bpf_map map;
104 struct net_device *netdev;
105 const struct bpf_map_dev_ops *dev_ops;
106 void *dev_priv;
107 struct list_head offloads;
108};
109
110static inline struct bpf_offloaded_map *map_to_offmap(struct bpf_map *map)
111{
112 return container_of(map, struct bpf_offloaded_map, map);
113}
114
115static inline bool bpf_map_offload_neutral(const struct bpf_map *map)
116{
117 return map->map_type == BPF_MAP_TYPE_PERF_EVENT_ARRAY;
118}
119
120static inline bool bpf_map_support_seq_show(const struct bpf_map *map)
121{
122 return map->btf && map->ops->map_seq_show_elem;
123}
124
125int map_check_no_btf(const struct bpf_map *map,
126 const struct btf_type *key_type,
127 const struct btf_type *value_type);
128
129extern const struct bpf_map_ops bpf_map_offload_ops;
130
131/* function argument constraints */
132enum bpf_arg_type {
133 ARG_DONTCARE = 0, /* unused argument in helper function */
134
135 /* the following constraints used to prototype
136 * bpf_map_lookup/update/delete_elem() functions
137 */
138 ARG_CONST_MAP_PTR, /* const argument used as pointer to bpf_map */
139 ARG_PTR_TO_MAP_KEY, /* pointer to stack used as map key */
140 ARG_PTR_TO_MAP_VALUE, /* pointer to stack used as map value */
141
142 /* the following constraints used to prototype bpf_memcmp() and other
143 * functions that access data on eBPF program stack
144 */
145 ARG_PTR_TO_MEM, /* pointer to valid memory (stack, packet, map value) */
146 ARG_PTR_TO_MEM_OR_NULL, /* pointer to valid memory or NULL */
147 ARG_PTR_TO_UNINIT_MEM, /* pointer to memory does not need to be initialized,
148 * helper function must fill all bytes or clear
149 * them in error case.
150 */
151
152 ARG_CONST_SIZE, /* number of bytes accessed from memory */
153 ARG_CONST_SIZE_OR_ZERO, /* number of bytes accessed from memory or 0 */
154
155 ARG_PTR_TO_CTX, /* pointer to context */
156 ARG_ANYTHING, /* any (initialized) argument is ok */
157};
158
159/* type of values returned from helper functions */
160enum bpf_return_type {
161 RET_INTEGER, /* function returns integer */
162 RET_VOID, /* function doesn't return anything */
163 RET_PTR_TO_MAP_VALUE, /* returns a pointer to map elem value */
164 RET_PTR_TO_MAP_VALUE_OR_NULL, /* returns a pointer to map elem value or NULL */
165};
166
167/* eBPF function prototype used by verifier to allow BPF_CALLs from eBPF programs
168 * to in-kernel helper functions and for adjusting imm32 field in BPF_CALL
169 * instructions after verifying
170 */
171struct bpf_func_proto {
172 u64 (*func)(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
173 bool gpl_only;
174 bool pkt_access;
175 enum bpf_return_type ret_type;
176 enum bpf_arg_type arg1_type;
177 enum bpf_arg_type arg2_type;
178 enum bpf_arg_type arg3_type;
179 enum bpf_arg_type arg4_type;
180 enum bpf_arg_type arg5_type;
181};
182
183/* bpf_context is intentionally undefined structure. Pointer to bpf_context is
184 * the first argument to eBPF programs.
185 * For socket filters: 'struct bpf_context *' == 'struct sk_buff *'
186 */
187struct bpf_context;
188
189enum bpf_access_type {
190 BPF_READ = 1,
191 BPF_WRITE = 2
192};
193
194/* types of values stored in eBPF registers */
195/* Pointer types represent:
196 * pointer
197 * pointer + imm
198 * pointer + (u16) var
199 * pointer + (u16) var + imm
200 * if (range > 0) then [ptr, ptr + range - off) is safe to access
201 * if (id > 0) means that some 'var' was added
202 * if (off > 0) means that 'imm' was added
203 */
204enum bpf_reg_type {
205 NOT_INIT = 0, /* nothing was written into register */
206 SCALAR_VALUE, /* reg doesn't contain a valid pointer */
207 PTR_TO_CTX, /* reg points to bpf_context */
208 CONST_PTR_TO_MAP, /* reg points to struct bpf_map */
209 PTR_TO_MAP_VALUE, /* reg points to map element value */
210 PTR_TO_MAP_VALUE_OR_NULL,/* points to map elem value or NULL */
211 PTR_TO_STACK, /* reg == frame_pointer + offset */
212 PTR_TO_PACKET_META, /* skb->data - meta_len */
213 PTR_TO_PACKET, /* reg points to skb->data */
214 PTR_TO_PACKET_END, /* skb->data + headlen */
215};
216
217/* The information passed from prog-specific *_is_valid_access
218 * back to the verifier.
219 */
220struct bpf_insn_access_aux {
221 enum bpf_reg_type reg_type;
222 int ctx_field_size;
223};
224
225static inline void
226bpf_ctx_record_field_size(struct bpf_insn_access_aux *aux, u32 size)
227{
228 aux->ctx_field_size = size;
229}
230
231struct bpf_prog_ops {
232 int (*test_run)(struct bpf_prog *prog, const union bpf_attr *kattr,
233 union bpf_attr __user *uattr);
234};
235
236struct bpf_verifier_ops {
237 /* return eBPF function prototype for verification */
238 const struct bpf_func_proto *
239 (*get_func_proto)(enum bpf_func_id func_id,
240 const struct bpf_prog *prog);
241
242 /* return true if 'size' wide access at offset 'off' within bpf_context
243 * with 'type' (read or write) is allowed
244 */
245 bool (*is_valid_access)(int off, int size, enum bpf_access_type type,
246 const struct bpf_prog *prog,
247 struct bpf_insn_access_aux *info);
248 int (*gen_prologue)(struct bpf_insn *insn, bool direct_write,
249 const struct bpf_prog *prog);
250 int (*gen_ld_abs)(const struct bpf_insn *orig,
251 struct bpf_insn *insn_buf);
252 u32 (*convert_ctx_access)(enum bpf_access_type type,
253 const struct bpf_insn *src,
254 struct bpf_insn *dst,
255 struct bpf_prog *prog, u32 *target_size);
256};
257
258struct bpf_prog_offload_ops {
259 int (*insn_hook)(struct bpf_verifier_env *env,
260 int insn_idx, int prev_insn_idx);
261};
262
263struct bpf_prog_offload {
264 struct bpf_prog *prog;
265 struct net_device *netdev;
266 void *dev_priv;
267 struct list_head offloads;
268 bool dev_state;
269 const struct bpf_prog_offload_ops *dev_ops;
270 void *jited_image;
271 u32 jited_len;
272};
273
274struct bpf_prog_aux {
275 atomic_t refcnt;
276 u32 used_map_cnt;
277 u32 max_ctx_offset;
278 u32 stack_depth;
279 u32 id;
280 u32 func_cnt;
281 bool offload_requested;
282 struct bpf_prog **func;
283 void *jit_data; /* JIT specific data. arch dependent */
284 struct latch_tree_node ksym_tnode;
285 struct list_head ksym_lnode;
286 const struct bpf_prog_ops *ops;
287 struct bpf_map **used_maps;
288 struct bpf_prog *prog;
289 struct user_struct *user;
290 u64 load_time; /* ns since boottime */
291 struct bpf_map *cgroup_storage;
292 char name[BPF_OBJ_NAME_LEN];
293#ifdef CONFIG_SECURITY
294 void *security;
295#endif
296 struct bpf_prog_offload *offload;
297 union {
298 struct work_struct work;
299 struct rcu_head rcu;
300 };
301};
302
303struct bpf_array {
304 struct bpf_map map;
305 u32 elem_size;
306 u32 index_mask;
307 /* 'ownership' of prog_array is claimed by the first program that
308 * is going to use this map or by the first program which FD is stored
309 * in the map to make sure that all callers and callees have the same
310 * prog_type and JITed flag
311 */
312 enum bpf_prog_type owner_prog_type;
313 bool owner_jited;
314 union {
315 char value[0] __aligned(8);
316 void *ptrs[0] __aligned(8);
317 void __percpu *pptrs[0] __aligned(8);
318 };
319};
320
321#define MAX_TAIL_CALL_CNT 32
322
323struct bpf_event_entry {
324 struct perf_event *event;
325 struct file *perf_file;
326 struct file *map_file;
327 struct rcu_head rcu;
328};
329
330bool bpf_prog_array_compatible(struct bpf_array *array, const struct bpf_prog *fp);
331int bpf_prog_calc_tag(struct bpf_prog *fp);
332
333const struct bpf_func_proto *bpf_get_trace_printk_proto(void);
334
335typedef unsigned long (*bpf_ctx_copy_t)(void *dst, const void *src,
336 unsigned long off, unsigned long len);
337
338u64 bpf_event_output(struct bpf_map *map, u64 flags, void *meta, u64 meta_size,
339 void *ctx, u64 ctx_size, bpf_ctx_copy_t ctx_copy);
340
341int bpf_prog_test_run_xdp(struct bpf_prog *prog, const union bpf_attr *kattr,
342 union bpf_attr __user *uattr);
343int bpf_prog_test_run_skb(struct bpf_prog *prog, const union bpf_attr *kattr,
344 union bpf_attr __user *uattr);
345
346/* an array of programs to be executed under rcu_lock.
347 *
348 * Typical usage:
349 * ret = BPF_PROG_RUN_ARRAY(&bpf_prog_array, ctx, BPF_PROG_RUN);
350 *
351 * the structure returned by bpf_prog_array_alloc() should be populated
352 * with program pointers and the last pointer must be NULL.
353 * The user has to keep refcnt on the program and make sure the program
354 * is removed from the array before bpf_prog_put().
355 * The 'struct bpf_prog_array *' should only be replaced with xchg()
356 * since other cpus are walking the array of pointers in parallel.
357 */
358struct bpf_prog_array_item {
359 struct bpf_prog *prog;
360 struct bpf_cgroup_storage *cgroup_storage;
361};
362
363struct bpf_prog_array {
364 struct rcu_head rcu;
365 struct bpf_prog_array_item items[0];
366};
367
368struct bpf_prog_array *bpf_prog_array_alloc(u32 prog_cnt, gfp_t flags);
369void bpf_prog_array_free(struct bpf_prog_array __rcu *progs);
370int bpf_prog_array_length(struct bpf_prog_array __rcu *progs);
371int bpf_prog_array_copy_to_user(struct bpf_prog_array __rcu *progs,
372 __u32 __user *prog_ids, u32 cnt);
373
374void bpf_prog_array_delete_safe(struct bpf_prog_array __rcu *progs,
375 struct bpf_prog *old_prog);
376int bpf_prog_array_copy_info(struct bpf_prog_array __rcu *array,
377 u32 *prog_ids, u32 request_cnt,
378 u32 *prog_cnt);
379int bpf_prog_array_copy(struct bpf_prog_array __rcu *old_array,
380 struct bpf_prog *exclude_prog,
381 struct bpf_prog *include_prog,
382 struct bpf_prog_array **new_array);
383
384#define __BPF_PROG_RUN_ARRAY(array, ctx, func, check_non_null) \
385 ({ \
386 struct bpf_prog_array_item *_item; \
387 struct bpf_prog *_prog; \
388 struct bpf_prog_array *_array; \
389 u32 _ret = 1; \
390 preempt_disable(); \
391 rcu_read_lock(); \
392 _array = rcu_dereference(array); \
393 if (unlikely(check_non_null && !_array))\
394 goto _out; \
395 _item = &_array->items[0]; \
396 while ((_prog = READ_ONCE(_item->prog))) { \
397 bpf_cgroup_storage_set(_item->cgroup_storage); \
398 _ret &= func(_prog, ctx); \
399 _item++; \
400 } \
401_out: \
402 rcu_read_unlock(); \
403 preempt_enable_no_resched(); \
404 _ret; \
405 })
406
407#define BPF_PROG_RUN_ARRAY(array, ctx, func) \
408 __BPF_PROG_RUN_ARRAY(array, ctx, func, false)
409
410#define BPF_PROG_RUN_ARRAY_CHECK(array, ctx, func) \
411 __BPF_PROG_RUN_ARRAY(array, ctx, func, true)
412
413#ifdef CONFIG_BPF_SYSCALL
414DECLARE_PER_CPU(int, bpf_prog_active);
415
416extern const struct file_operations bpf_map_fops;
417extern const struct file_operations bpf_prog_fops;
418
419#define BPF_PROG_TYPE(_id, _name) \
420 extern const struct bpf_prog_ops _name ## _prog_ops; \
421 extern const struct bpf_verifier_ops _name ## _verifier_ops;
422#define BPF_MAP_TYPE(_id, _ops) \
423 extern const struct bpf_map_ops _ops;
424#include <linux/bpf_types.h>
425#undef BPF_PROG_TYPE
426#undef BPF_MAP_TYPE
427
428extern const struct bpf_prog_ops bpf_offload_prog_ops;
429extern const struct bpf_verifier_ops tc_cls_act_analyzer_ops;
430extern const struct bpf_verifier_ops xdp_analyzer_ops;
431
432struct bpf_prog *bpf_prog_get(u32 ufd);
433struct bpf_prog *bpf_prog_get_type_dev(u32 ufd, enum bpf_prog_type type,
434 bool attach_drv);
435struct bpf_prog * __must_check bpf_prog_add(struct bpf_prog *prog, int i);
436void bpf_prog_sub(struct bpf_prog *prog, int i);
437struct bpf_prog * __must_check bpf_prog_inc(struct bpf_prog *prog);
438struct bpf_prog * __must_check bpf_prog_inc_not_zero(struct bpf_prog *prog);
439void bpf_prog_put(struct bpf_prog *prog);
440int __bpf_prog_charge(struct user_struct *user, u32 pages);
441void __bpf_prog_uncharge(struct user_struct *user, u32 pages);
442
443void bpf_prog_free_id(struct bpf_prog *prog, bool do_idr_lock);
444void bpf_map_free_id(struct bpf_map *map, bool do_idr_lock);
445
446struct bpf_map *bpf_map_get_with_uref(u32 ufd);
447struct bpf_map *__bpf_map_get(struct fd f);
448struct bpf_map * __must_check bpf_map_inc(struct bpf_map *map, bool uref);
449void bpf_map_put_with_uref(struct bpf_map *map);
450void bpf_map_put(struct bpf_map *map);
451int bpf_map_precharge_memlock(u32 pages);
452int bpf_map_charge_memlock(struct bpf_map *map, u32 pages);
453void bpf_map_uncharge_memlock(struct bpf_map *map, u32 pages);
454void *bpf_map_area_alloc(size_t size, int numa_node);
455void bpf_map_area_free(void *base);
456void bpf_map_init_from_attr(struct bpf_map *map, union bpf_attr *attr);
457
458extern int sysctl_unprivileged_bpf_disabled;
459
460int bpf_map_new_fd(struct bpf_map *map, int flags);
461int bpf_prog_new_fd(struct bpf_prog *prog);
462
463int bpf_obj_pin_user(u32 ufd, const char __user *pathname);
464int bpf_obj_get_user(const char __user *pathname, int flags);
465
466int bpf_percpu_hash_copy(struct bpf_map *map, void *key, void *value);
467int bpf_percpu_array_copy(struct bpf_map *map, void *key, void *value);
468int bpf_percpu_hash_update(struct bpf_map *map, void *key, void *value,
469 u64 flags);
470int bpf_percpu_array_update(struct bpf_map *map, void *key, void *value,
471 u64 flags);
472
473int bpf_stackmap_copy(struct bpf_map *map, void *key, void *value);
474
475int bpf_fd_array_map_update_elem(struct bpf_map *map, struct file *map_file,
476 void *key, void *value, u64 map_flags);
477int bpf_fd_array_map_lookup_elem(struct bpf_map *map, void *key, u32 *value);
478int bpf_fd_htab_map_update_elem(struct bpf_map *map, struct file *map_file,
479 void *key, void *value, u64 map_flags);
480int bpf_fd_htab_map_lookup_elem(struct bpf_map *map, void *key, u32 *value);
481
482int bpf_get_file_flag(int flags);
483int bpf_check_uarg_tail_zero(void __user *uaddr, size_t expected_size,
484 size_t actual_size);
485
486/* memcpy that is used with 8-byte aligned pointers, power-of-8 size and
487 * forced to use 'long' read/writes to try to atomically copy long counters.
488 * Best-effort only. No barriers here, since it _will_ race with concurrent
489 * updates from BPF programs. Called from bpf syscall and mostly used with
490 * size 8 or 16 bytes, so ask compiler to inline it.
491 */
492static inline void bpf_long_memcpy(void *dst, const void *src, u32 size)
493{
494 const long *lsrc = src;
495 long *ldst = dst;
496
497 size /= sizeof(long);
498 while (size--)
499 *ldst++ = *lsrc++;
500}
501
502/* verify correctness of eBPF program */
503int bpf_check(struct bpf_prog **fp, union bpf_attr *attr);
504void bpf_patch_call_args(struct bpf_insn *insn, u32 stack_depth);
505
506/* Map specifics */
507struct xdp_buff;
508struct sk_buff;
509
510struct bpf_dtab_netdev *__dev_map_lookup_elem(struct bpf_map *map, u32 key);
511void __dev_map_insert_ctx(struct bpf_map *map, u32 index);
512void __dev_map_flush(struct bpf_map *map);
513int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp,
514 struct net_device *dev_rx);
515int dev_map_generic_redirect(struct bpf_dtab_netdev *dst, struct sk_buff *skb,
516 struct bpf_prog *xdp_prog);
517
518struct bpf_cpu_map_entry *__cpu_map_lookup_elem(struct bpf_map *map, u32 key);
519void __cpu_map_insert_ctx(struct bpf_map *map, u32 index);
520void __cpu_map_flush(struct bpf_map *map);
521int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu, struct xdp_buff *xdp,
522 struct net_device *dev_rx);
523
524/* Return map's numa specified by userspace */
525static inline int bpf_map_attr_numa_node(const union bpf_attr *attr)
526{
527 return (attr->map_flags & BPF_F_NUMA_NODE) ?
528 attr->numa_node : NUMA_NO_NODE;
529}
530
531struct bpf_prog *bpf_prog_get_type_path(const char *name, enum bpf_prog_type type);
532int array_map_alloc_check(union bpf_attr *attr);
533
534#else /* !CONFIG_BPF_SYSCALL */
535static inline struct bpf_prog *bpf_prog_get(u32 ufd)
536{
537 return ERR_PTR(-EOPNOTSUPP);
538}
539
540static inline struct bpf_prog *bpf_prog_get_type_dev(u32 ufd,
541 enum bpf_prog_type type,
542 bool attach_drv)
543{
544 return ERR_PTR(-EOPNOTSUPP);
545}
546
547static inline struct bpf_prog * __must_check bpf_prog_add(struct bpf_prog *prog,
548 int i)
549{
550 return ERR_PTR(-EOPNOTSUPP);
551}
552
553static inline void bpf_prog_sub(struct bpf_prog *prog, int i)
554{
555}
556
557static inline void bpf_prog_put(struct bpf_prog *prog)
558{
559}
560
561static inline struct bpf_prog * __must_check bpf_prog_inc(struct bpf_prog *prog)
562{
563 return ERR_PTR(-EOPNOTSUPP);
564}
565
566static inline struct bpf_prog *__must_check
567bpf_prog_inc_not_zero(struct bpf_prog *prog)
568{
569 return ERR_PTR(-EOPNOTSUPP);
570}
571
572static inline int __bpf_prog_charge(struct user_struct *user, u32 pages)
573{
574 return 0;
575}
576
577static inline void __bpf_prog_uncharge(struct user_struct *user, u32 pages)
578{
579}
580
581static inline int bpf_obj_get_user(const char __user *pathname, int flags)
582{
583 return -EOPNOTSUPP;
584}
585
586static inline struct net_device *__dev_map_lookup_elem(struct bpf_map *map,
587 u32 key)
588{
589 return NULL;
590}
591
592static inline void __dev_map_insert_ctx(struct bpf_map *map, u32 index)
593{
594}
595
596static inline void __dev_map_flush(struct bpf_map *map)
597{
598}
599
600struct xdp_buff;
601struct bpf_dtab_netdev;
602
603static inline
604int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp,
605 struct net_device *dev_rx)
606{
607 return 0;
608}
609
610struct sk_buff;
611
612static inline int dev_map_generic_redirect(struct bpf_dtab_netdev *dst,
613 struct sk_buff *skb,
614 struct bpf_prog *xdp_prog)
615{
616 return 0;
617}
618
619static inline
620struct bpf_cpu_map_entry *__cpu_map_lookup_elem(struct bpf_map *map, u32 key)
621{
622 return NULL;
623}
624
625static inline void __cpu_map_insert_ctx(struct bpf_map *map, u32 index)
626{
627}
628
629static inline void __cpu_map_flush(struct bpf_map *map)
630{
631}
632
633static inline int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu,
634 struct xdp_buff *xdp,
635 struct net_device *dev_rx)
636{
637 return 0;
638}
639
640static inline struct bpf_prog *bpf_prog_get_type_path(const char *name,
641 enum bpf_prog_type type)
642{
643 return ERR_PTR(-EOPNOTSUPP);
644}
645#endif /* CONFIG_BPF_SYSCALL */
646
647static inline struct bpf_prog *bpf_prog_get_type(u32 ufd,
648 enum bpf_prog_type type)
649{
650 return bpf_prog_get_type_dev(ufd, type, false);
651}
652
653bool bpf_prog_get_ok(struct bpf_prog *, enum bpf_prog_type *, bool);
654
655int bpf_prog_offload_compile(struct bpf_prog *prog);
656void bpf_prog_offload_destroy(struct bpf_prog *prog);
657int bpf_prog_offload_info_fill(struct bpf_prog_info *info,
658 struct bpf_prog *prog);
659
660int bpf_map_offload_info_fill(struct bpf_map_info *info, struct bpf_map *map);
661
662int bpf_map_offload_lookup_elem(struct bpf_map *map, void *key, void *value);
663int bpf_map_offload_update_elem(struct bpf_map *map,
664 void *key, void *value, u64 flags);
665int bpf_map_offload_delete_elem(struct bpf_map *map, void *key);
666int bpf_map_offload_get_next_key(struct bpf_map *map,
667 void *key, void *next_key);
668
669bool bpf_offload_prog_map_match(struct bpf_prog *prog, struct bpf_map *map);
670
671struct bpf_offload_dev *bpf_offload_dev_create(void);
672void bpf_offload_dev_destroy(struct bpf_offload_dev *offdev);
673int bpf_offload_dev_netdev_register(struct bpf_offload_dev *offdev,
674 struct net_device *netdev);
675void bpf_offload_dev_netdev_unregister(struct bpf_offload_dev *offdev,
676 struct net_device *netdev);
677bool bpf_offload_dev_match(struct bpf_prog *prog, struct net_device *netdev);
678
679#if defined(CONFIG_NET) && defined(CONFIG_BPF_SYSCALL)
680int bpf_prog_offload_init(struct bpf_prog *prog, union bpf_attr *attr);
681
682static inline bool bpf_prog_is_dev_bound(const struct bpf_prog_aux *aux)
683{
684 return aux->offload_requested;
685}
686
687static inline bool bpf_map_is_dev_bound(struct bpf_map *map)
688{
689 return unlikely(map->ops == &bpf_map_offload_ops);
690}
691
692struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr);
693void bpf_map_offload_map_free(struct bpf_map *map);
694#else
695static inline int bpf_prog_offload_init(struct bpf_prog *prog,
696 union bpf_attr *attr)
697{
698 return -EOPNOTSUPP;
699}
700
701static inline bool bpf_prog_is_dev_bound(struct bpf_prog_aux *aux)
702{
703 return false;
704}
705
706static inline bool bpf_map_is_dev_bound(struct bpf_map *map)
707{
708 return false;
709}
710
711static inline struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr)
712{
713 return ERR_PTR(-EOPNOTSUPP);
714}
715
716static inline void bpf_map_offload_map_free(struct bpf_map *map)
717{
718}
719#endif /* CONFIG_NET && CONFIG_BPF_SYSCALL */
720
721#if defined(CONFIG_STREAM_PARSER) && defined(CONFIG_BPF_SYSCALL) && defined(CONFIG_INET)
722struct sock *__sock_map_lookup_elem(struct bpf_map *map, u32 key);
723struct sock *__sock_hash_lookup_elem(struct bpf_map *map, void *key);
724int sock_map_prog(struct bpf_map *map, struct bpf_prog *prog, u32 type);
725int sockmap_get_from_fd(const union bpf_attr *attr, int type,
726 struct bpf_prog *prog);
727#else
728static inline struct sock *__sock_map_lookup_elem(struct bpf_map *map, u32 key)
729{
730 return NULL;
731}
732
733static inline struct sock *__sock_hash_lookup_elem(struct bpf_map *map,
734 void *key)
735{
736 return NULL;
737}
738
739static inline int sock_map_prog(struct bpf_map *map,
740 struct bpf_prog *prog,
741 u32 type)
742{
743 return -EOPNOTSUPP;
744}
745
746static inline int sockmap_get_from_fd(const union bpf_attr *attr, int type,
747 struct bpf_prog *prog)
748{
749 return -EINVAL;
750}
751#endif
752
753#if defined(CONFIG_XDP_SOCKETS)
754struct xdp_sock;
755struct xdp_sock *__xsk_map_lookup_elem(struct bpf_map *map, u32 key);
756int __xsk_map_redirect(struct bpf_map *map, struct xdp_buff *xdp,
757 struct xdp_sock *xs);
758void __xsk_map_flush(struct bpf_map *map);
759#else
760struct xdp_sock;
761static inline struct xdp_sock *__xsk_map_lookup_elem(struct bpf_map *map,
762 u32 key)
763{
764 return NULL;
765}
766
767static inline int __xsk_map_redirect(struct bpf_map *map, struct xdp_buff *xdp,
768 struct xdp_sock *xs)
769{
770 return -EOPNOTSUPP;
771}
772
773static inline void __xsk_map_flush(struct bpf_map *map)
774{
775}
776#endif
777
778#if defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL)
779void bpf_sk_reuseport_detach(struct sock *sk);
780int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map, void *key,
781 void *value);
782int bpf_fd_reuseport_array_update_elem(struct bpf_map *map, void *key,
783 void *value, u64 map_flags);
784#else
785static inline void bpf_sk_reuseport_detach(struct sock *sk)
786{
787}
788
789#ifdef CONFIG_BPF_SYSCALL
790static inline int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map,
791 void *key, void *value)
792{
793 return -EOPNOTSUPP;
794}
795
796static inline int bpf_fd_reuseport_array_update_elem(struct bpf_map *map,
797 void *key, void *value,
798 u64 map_flags)
799{
800 return -EOPNOTSUPP;
801}
802#endif /* CONFIG_BPF_SYSCALL */
803#endif /* defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL) */
804
805/* verifier prototypes for helper functions called from eBPF programs */
806extern const struct bpf_func_proto bpf_map_lookup_elem_proto;
807extern const struct bpf_func_proto bpf_map_update_elem_proto;
808extern const struct bpf_func_proto bpf_map_delete_elem_proto;
809
810extern const struct bpf_func_proto bpf_get_prandom_u32_proto;
811extern const struct bpf_func_proto bpf_get_smp_processor_id_proto;
812extern const struct bpf_func_proto bpf_get_numa_node_id_proto;
813extern const struct bpf_func_proto bpf_tail_call_proto;
814extern const struct bpf_func_proto bpf_ktime_get_ns_proto;
815extern const struct bpf_func_proto bpf_get_current_pid_tgid_proto;
816extern const struct bpf_func_proto bpf_get_current_uid_gid_proto;
817extern const struct bpf_func_proto bpf_get_current_comm_proto;
818extern const struct bpf_func_proto bpf_get_stackid_proto;
819extern const struct bpf_func_proto bpf_get_stack_proto;
820extern const struct bpf_func_proto bpf_sock_map_update_proto;
821extern const struct bpf_func_proto bpf_sock_hash_update_proto;
822extern const struct bpf_func_proto bpf_get_current_cgroup_id_proto;
823
824extern const struct bpf_func_proto bpf_get_local_storage_proto;
825
826/* Shared helpers among cBPF and eBPF. */
827void bpf_user_rnd_init_once(void);
828u64 bpf_user_rnd_u32(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
829
830#endif /* _LINUX_BPF_H */
831