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CommitLineData
99c55f7d
AS
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>
74451e66 11
99c55f7d 12#include <linux/workqueue.h>
db20fd2b 13#include <linux/file.h>
b121d1e7 14#include <linux/percpu.h>
002245cc 15#include <linux/err.h>
74451e66 16#include <linux/rbtree_latch.h>
d6e1e46f 17#include <linux/numa.h>
ab3f0063 18#include <linux/wait.h>
99c55f7d 19
3b1efb19 20struct perf_event;
174a79ff 21struct bpf_prog;
99c55f7d
AS
22struct bpf_map;
23
24/* map is generic key/value storage optionally accesible by eBPF programs */
25struct bpf_map_ops {
26 /* funcs callable from userspace (via syscall) */
144bc489 27 int (*map_alloc_check)(union bpf_attr *attr);
99c55f7d 28 struct bpf_map *(*map_alloc)(union bpf_attr *attr);
61d1b6a4
DB
29 void (*map_release)(struct bpf_map *map, struct file *map_file);
30 void (*map_free)(struct bpf_map *map);
db20fd2b
AS
31 int (*map_get_next_key)(struct bpf_map *map, void *key, void *next_key);
32
33 /* funcs callable from userspace and from eBPF programs */
34 void *(*map_lookup_elem)(struct bpf_map *map, void *key);
3274f520 35 int (*map_update_elem)(struct bpf_map *map, void *key, void *value, u64 flags);
db20fd2b 36 int (*map_delete_elem)(struct bpf_map *map, void *key);
2a36f0b9
WN
37
38 /* funcs called by prog_array and perf_event_array map */
d056a788
DB
39 void *(*map_fd_get_ptr)(struct bpf_map *map, struct file *map_file,
40 int fd);
41 void (*map_fd_put_ptr)(void *ptr);
81ed18ab 42 u32 (*map_gen_lookup)(struct bpf_map *map, struct bpf_insn *insn_buf);
14dc6f04 43 u32 (*map_fd_sys_lookup_elem)(void *ptr);
99c55f7d
AS
44};
45
46struct bpf_map {
be95a845
DB
47 /* 1st cacheline with read-mostly members of which some
48 * are also accessed in fast-path (e.g. ops, max_entries).
49 */
50 const struct bpf_map_ops *ops ____cacheline_aligned;
51 struct bpf_map *inner_map_meta;
52#ifdef CONFIG_SECURITY
53 void *security;
54#endif
99c55f7d
AS
55 enum bpf_map_type map_type;
56 u32 key_size;
57 u32 value_size;
58 u32 max_entries;
6c905981 59 u32 map_flags;
aaac3ba9 60 u32 pages;
f3f1c054 61 u32 id;
96eabe7a 62 int numa_node;
b2157399 63 bool unpriv_array;
be95a845
DB
64 /* 7 bytes hole */
65
66 /* 2nd cacheline with misc members to avoid false sharing
67 * particularly with refcounting.
68 */
69 struct user_struct *user ____cacheline_aligned;
70 atomic_t refcnt;
c9da161c 71 atomic_t usercnt;
be95a845 72 struct work_struct work;
067cae47 73 char name[BPF_OBJ_NAME_LEN];
99c55f7d
AS
74};
75
17a52670
AS
76/* function argument constraints */
77enum bpf_arg_type {
80f1d68c 78 ARG_DONTCARE = 0, /* unused argument in helper function */
17a52670
AS
79
80 /* the following constraints used to prototype
81 * bpf_map_lookup/update/delete_elem() functions
82 */
83 ARG_CONST_MAP_PTR, /* const argument used as pointer to bpf_map */
84 ARG_PTR_TO_MAP_KEY, /* pointer to stack used as map key */
85 ARG_PTR_TO_MAP_VALUE, /* pointer to stack used as map value */
86
87 /* the following constraints used to prototype bpf_memcmp() and other
88 * functions that access data on eBPF program stack
89 */
39f19ebb 90 ARG_PTR_TO_MEM, /* pointer to valid memory (stack, packet, map value) */
db1ac496 91 ARG_PTR_TO_MEM_OR_NULL, /* pointer to valid memory or NULL */
39f19ebb
AS
92 ARG_PTR_TO_UNINIT_MEM, /* pointer to memory does not need to be initialized,
93 * helper function must fill all bytes or clear
94 * them in error case.
435faee1
DB
95 */
96
39f19ebb
AS
97 ARG_CONST_SIZE, /* number of bytes accessed from memory */
98 ARG_CONST_SIZE_OR_ZERO, /* number of bytes accessed from memory or 0 */
80f1d68c 99
608cd71a 100 ARG_PTR_TO_CTX, /* pointer to context */
80f1d68c 101 ARG_ANYTHING, /* any (initialized) argument is ok */
17a52670
AS
102};
103
104/* type of values returned from helper functions */
105enum bpf_return_type {
106 RET_INTEGER, /* function returns integer */
107 RET_VOID, /* function doesn't return anything */
108 RET_PTR_TO_MAP_VALUE_OR_NULL, /* returns a pointer to map elem value or NULL */
109};
110
09756af4
AS
111/* eBPF function prototype used by verifier to allow BPF_CALLs from eBPF programs
112 * to in-kernel helper functions and for adjusting imm32 field in BPF_CALL
113 * instructions after verifying
114 */
115struct bpf_func_proto {
116 u64 (*func)(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
117 bool gpl_only;
36bbef52 118 bool pkt_access;
17a52670
AS
119 enum bpf_return_type ret_type;
120 enum bpf_arg_type arg1_type;
121 enum bpf_arg_type arg2_type;
122 enum bpf_arg_type arg3_type;
123 enum bpf_arg_type arg4_type;
124 enum bpf_arg_type arg5_type;
125};
126
127/* bpf_context is intentionally undefined structure. Pointer to bpf_context is
128 * the first argument to eBPF programs.
129 * For socket filters: 'struct bpf_context *' == 'struct sk_buff *'
130 */
131struct bpf_context;
132
133enum bpf_access_type {
134 BPF_READ = 1,
135 BPF_WRITE = 2
09756af4
AS
136};
137
19de99f7 138/* types of values stored in eBPF registers */
f1174f77
EC
139/* Pointer types represent:
140 * pointer
141 * pointer + imm
142 * pointer + (u16) var
143 * pointer + (u16) var + imm
144 * if (range > 0) then [ptr, ptr + range - off) is safe to access
145 * if (id > 0) means that some 'var' was added
146 * if (off > 0) means that 'imm' was added
147 */
19de99f7
AS
148enum bpf_reg_type {
149 NOT_INIT = 0, /* nothing was written into register */
f1174f77 150 SCALAR_VALUE, /* reg doesn't contain a valid pointer */
19de99f7
AS
151 PTR_TO_CTX, /* reg points to bpf_context */
152 CONST_PTR_TO_MAP, /* reg points to struct bpf_map */
153 PTR_TO_MAP_VALUE, /* reg points to map element value */
154 PTR_TO_MAP_VALUE_OR_NULL,/* points to map elem value or NULL */
f1174f77 155 PTR_TO_STACK, /* reg == frame_pointer + offset */
de8f3a83 156 PTR_TO_PACKET_META, /* skb->data - meta_len */
f1174f77 157 PTR_TO_PACKET, /* reg points to skb->data */
19de99f7
AS
158 PTR_TO_PACKET_END, /* skb->data + headlen */
159};
160
23994631
YS
161/* The information passed from prog-specific *_is_valid_access
162 * back to the verifier.
163 */
164struct bpf_insn_access_aux {
165 enum bpf_reg_type reg_type;
166 int ctx_field_size;
23994631
YS
167};
168
f96da094
DB
169static inline void
170bpf_ctx_record_field_size(struct bpf_insn_access_aux *aux, u32 size)
171{
172 aux->ctx_field_size = size;
173}
174
7de16e3a
JK
175struct bpf_prog_ops {
176 int (*test_run)(struct bpf_prog *prog, const union bpf_attr *kattr,
177 union bpf_attr __user *uattr);
178};
179
09756af4
AS
180struct bpf_verifier_ops {
181 /* return eBPF function prototype for verification */
182 const struct bpf_func_proto *(*get_func_proto)(enum bpf_func_id func_id);
17a52670
AS
183
184 /* return true if 'size' wide access at offset 'off' within bpf_context
185 * with 'type' (read or write) is allowed
186 */
19de99f7 187 bool (*is_valid_access)(int off, int size, enum bpf_access_type type,
23994631 188 struct bpf_insn_access_aux *info);
36bbef52
DB
189 int (*gen_prologue)(struct bpf_insn *insn, bool direct_write,
190 const struct bpf_prog *prog);
6b8cc1d1
DB
191 u32 (*convert_ctx_access)(enum bpf_access_type type,
192 const struct bpf_insn *src,
193 struct bpf_insn *dst,
f96da094 194 struct bpf_prog *prog, u32 *target_size);
09756af4
AS
195};
196
ab3f0063
JK
197struct bpf_dev_offload {
198 struct bpf_prog *prog;
199 struct net_device *netdev;
200 void *dev_priv;
201 struct list_head offloads;
202 bool dev_state;
203 bool verifier_running;
204 wait_queue_head_t verifier_done;
205};
206
09756af4
AS
207struct bpf_prog_aux {
208 atomic_t refcnt;
24701ece 209 u32 used_map_cnt;
32bbe007 210 u32 max_ctx_offset;
8726679a 211 u32 stack_depth;
dc4bb0e2 212 u32 id;
74451e66
DB
213 struct latch_tree_node ksym_tnode;
214 struct list_head ksym_lnode;
7de16e3a 215 const struct bpf_prog_ops *ops;
09756af4 216 struct bpf_map **used_maps;
09756af4 217 struct bpf_prog *prog;
aaac3ba9 218 struct user_struct *user;
cb4d2b3f 219 u64 load_time; /* ns since boottime */
067cae47 220 char name[BPF_OBJ_NAME_LEN];
afdb09c7
CF
221#ifdef CONFIG_SECURITY
222 void *security;
223#endif
ab3f0063 224 struct bpf_dev_offload *offload;
abf2e7d6
AS
225 union {
226 struct work_struct work;
227 struct rcu_head rcu;
228 };
09756af4
AS
229};
230
04fd61ab
AS
231struct bpf_array {
232 struct bpf_map map;
233 u32 elem_size;
b2157399 234 u32 index_mask;
04fd61ab
AS
235 /* 'ownership' of prog_array is claimed by the first program that
236 * is going to use this map or by the first program which FD is stored
237 * in the map to make sure that all callers and callees have the same
238 * prog_type and JITed flag
239 */
240 enum bpf_prog_type owner_prog_type;
241 bool owner_jited;
242 union {
243 char value[0] __aligned(8);
2a36f0b9 244 void *ptrs[0] __aligned(8);
a10423b8 245 void __percpu *pptrs[0] __aligned(8);
04fd61ab
AS
246 };
247};
3b1efb19 248
04fd61ab
AS
249#define MAX_TAIL_CALL_CNT 32
250
3b1efb19
DB
251struct bpf_event_entry {
252 struct perf_event *event;
253 struct file *perf_file;
254 struct file *map_file;
255 struct rcu_head rcu;
256};
257
04fd61ab 258bool bpf_prog_array_compatible(struct bpf_array *array, const struct bpf_prog *fp);
f1f7714e 259int bpf_prog_calc_tag(struct bpf_prog *fp);
bd570ff9 260
0756ea3e 261const struct bpf_func_proto *bpf_get_trace_printk_proto(void);
555c8a86
DB
262
263typedef unsigned long (*bpf_ctx_copy_t)(void *dst, const void *src,
aa7145c1 264 unsigned long off, unsigned long len);
555c8a86
DB
265
266u64 bpf_event_output(struct bpf_map *map, u64 flags, void *meta, u64 meta_size,
267 void *ctx, u64 ctx_size, bpf_ctx_copy_t ctx_copy);
04fd61ab 268
1cf1cae9
AS
269int bpf_prog_test_run_xdp(struct bpf_prog *prog, const union bpf_attr *kattr,
270 union bpf_attr __user *uattr);
271int bpf_prog_test_run_skb(struct bpf_prog *prog, const union bpf_attr *kattr,
272 union bpf_attr __user *uattr);
273
324bda9e
AS
274/* an array of programs to be executed under rcu_lock.
275 *
276 * Typical usage:
277 * ret = BPF_PROG_RUN_ARRAY(&bpf_prog_array, ctx, BPF_PROG_RUN);
278 *
279 * the structure returned by bpf_prog_array_alloc() should be populated
280 * with program pointers and the last pointer must be NULL.
281 * The user has to keep refcnt on the program and make sure the program
282 * is removed from the array before bpf_prog_put().
283 * The 'struct bpf_prog_array *' should only be replaced with xchg()
284 * since other cpus are walking the array of pointers in parallel.
285 */
286struct bpf_prog_array {
287 struct rcu_head rcu;
288 struct bpf_prog *progs[0];
289};
290
291struct bpf_prog_array __rcu *bpf_prog_array_alloc(u32 prog_cnt, gfp_t flags);
292void bpf_prog_array_free(struct bpf_prog_array __rcu *progs);
468e2f64
AS
293int bpf_prog_array_length(struct bpf_prog_array __rcu *progs);
294int bpf_prog_array_copy_to_user(struct bpf_prog_array __rcu *progs,
295 __u32 __user *prog_ids, u32 cnt);
324bda9e 296
e87c6bc3
YS
297void bpf_prog_array_delete_safe(struct bpf_prog_array __rcu *progs,
298 struct bpf_prog *old_prog);
299int bpf_prog_array_copy(struct bpf_prog_array __rcu *old_array,
300 struct bpf_prog *exclude_prog,
301 struct bpf_prog *include_prog,
302 struct bpf_prog_array **new_array);
303
304#define __BPF_PROG_RUN_ARRAY(array, ctx, func, check_non_null) \
324bda9e 305 ({ \
e87c6bc3
YS
306 struct bpf_prog **_prog, *__prog; \
307 struct bpf_prog_array *_array; \
324bda9e
AS
308 u32 _ret = 1; \
309 rcu_read_lock(); \
e87c6bc3
YS
310 _array = rcu_dereference(array); \
311 if (unlikely(check_non_null && !_array))\
312 goto _out; \
313 _prog = _array->progs; \
314 while ((__prog = READ_ONCE(*_prog))) { \
315 _ret &= func(__prog, ctx); \
316 _prog++; \
317 } \
318_out: \
324bda9e
AS
319 rcu_read_unlock(); \
320 _ret; \
321 })
322
e87c6bc3
YS
323#define BPF_PROG_RUN_ARRAY(array, ctx, func) \
324 __BPF_PROG_RUN_ARRAY(array, ctx, func, false)
325
326#define BPF_PROG_RUN_ARRAY_CHECK(array, ctx, func) \
327 __BPF_PROG_RUN_ARRAY(array, ctx, func, true)
328
89aa0758 329#ifdef CONFIG_BPF_SYSCALL
b121d1e7
AS
330DECLARE_PER_CPU(int, bpf_prog_active);
331
f66e448c
CF
332extern const struct file_operations bpf_map_fops;
333extern const struct file_operations bpf_prog_fops;
334
7de16e3a
JK
335#define BPF_PROG_TYPE(_id, _name) \
336 extern const struct bpf_prog_ops _name ## _prog_ops; \
337 extern const struct bpf_verifier_ops _name ## _verifier_ops;
40077e0c
JB
338#define BPF_MAP_TYPE(_id, _ops) \
339 extern const struct bpf_map_ops _ops;
be9370a7
JB
340#include <linux/bpf_types.h>
341#undef BPF_PROG_TYPE
40077e0c 342#undef BPF_MAP_TYPE
0fc174de 343
ab3f0063 344extern const struct bpf_prog_ops bpf_offload_prog_ops;
4f9218aa
JK
345extern const struct bpf_verifier_ops tc_cls_act_analyzer_ops;
346extern const struct bpf_verifier_ops xdp_analyzer_ops;
347
0fc174de 348struct bpf_prog *bpf_prog_get(u32 ufd);
248f346f 349struct bpf_prog *bpf_prog_get_type_dev(u32 ufd, enum bpf_prog_type type,
288b3de5 350 bool attach_drv);
6d67942d 351struct bpf_prog * __must_check bpf_prog_add(struct bpf_prog *prog, int i);
c540594f 352void bpf_prog_sub(struct bpf_prog *prog, int i);
6d67942d 353struct bpf_prog * __must_check bpf_prog_inc(struct bpf_prog *prog);
a6f6df69 354struct bpf_prog * __must_check bpf_prog_inc_not_zero(struct bpf_prog *prog);
61e021f3 355void bpf_prog_put(struct bpf_prog *prog);
5ccb071e
DB
356int __bpf_prog_charge(struct user_struct *user, u32 pages);
357void __bpf_prog_uncharge(struct user_struct *user, u32 pages);
61e021f3 358
c9da161c 359struct bpf_map *bpf_map_get_with_uref(u32 ufd);
c2101297 360struct bpf_map *__bpf_map_get(struct fd f);
6d67942d 361struct bpf_map * __must_check bpf_map_inc(struct bpf_map *map, bool uref);
c9da161c 362void bpf_map_put_with_uref(struct bpf_map *map);
61e021f3 363void bpf_map_put(struct bpf_map *map);
6c905981 364int bpf_map_precharge_memlock(u32 pages);
96eabe7a 365void *bpf_map_area_alloc(size_t size, int numa_node);
d407bd25 366void bpf_map_area_free(void *base);
61e021f3 367
1be7f75d
AS
368extern int sysctl_unprivileged_bpf_disabled;
369
6e71b04a 370int bpf_map_new_fd(struct bpf_map *map, int flags);
b2197755
DB
371int bpf_prog_new_fd(struct bpf_prog *prog);
372
373int bpf_obj_pin_user(u32 ufd, const char __user *pathname);
6e71b04a 374int bpf_obj_get_user(const char __user *pathname, int flags);
b2197755 375
15a07b33
AS
376int bpf_percpu_hash_copy(struct bpf_map *map, void *key, void *value);
377int bpf_percpu_array_copy(struct bpf_map *map, void *key, void *value);
378int bpf_percpu_hash_update(struct bpf_map *map, void *key, void *value,
379 u64 flags);
380int bpf_percpu_array_update(struct bpf_map *map, void *key, void *value,
381 u64 flags);
d056a788 382
557c0c6e 383int bpf_stackmap_copy(struct bpf_map *map, void *key, void *value);
15a07b33 384
d056a788
DB
385int bpf_fd_array_map_update_elem(struct bpf_map *map, struct file *map_file,
386 void *key, void *value, u64 map_flags);
14dc6f04 387int bpf_fd_array_map_lookup_elem(struct bpf_map *map, void *key, u32 *value);
d056a788 388void bpf_fd_array_map_clear(struct bpf_map *map);
bcc6b1b7
MKL
389int bpf_fd_htab_map_update_elem(struct bpf_map *map, struct file *map_file,
390 void *key, void *value, u64 map_flags);
14dc6f04 391int bpf_fd_htab_map_lookup_elem(struct bpf_map *map, void *key, u32 *value);
d056a788 392
6e71b04a
CF
393int bpf_get_file_flag(int flags);
394
15a07b33
AS
395/* memcpy that is used with 8-byte aligned pointers, power-of-8 size and
396 * forced to use 'long' read/writes to try to atomically copy long counters.
397 * Best-effort only. No barriers here, since it _will_ race with concurrent
398 * updates from BPF programs. Called from bpf syscall and mostly used with
399 * size 8 or 16 bytes, so ask compiler to inline it.
400 */
401static inline void bpf_long_memcpy(void *dst, const void *src, u32 size)
402{
403 const long *lsrc = src;
404 long *ldst = dst;
405
406 size /= sizeof(long);
407 while (size--)
408 *ldst++ = *lsrc++;
409}
410
61e021f3 411/* verify correctness of eBPF program */
9bac3d6d 412int bpf_check(struct bpf_prog **fp, union bpf_attr *attr);
46f55cff
JF
413
414/* Map specifics */
415struct net_device *__dev_map_lookup_elem(struct bpf_map *map, u32 key);
416void __dev_map_insert_ctx(struct bpf_map *map, u32 index);
417void __dev_map_flush(struct bpf_map *map);
418
9c270af3
JDB
419struct bpf_cpu_map_entry *__cpu_map_lookup_elem(struct bpf_map *map, u32 key);
420void __cpu_map_insert_ctx(struct bpf_map *map, u32 index);
421void __cpu_map_flush(struct bpf_map *map);
422struct xdp_buff;
423int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu, struct xdp_buff *xdp,
424 struct net_device *dev_rx);
425
96eabe7a
MKL
426/* Return map's numa specified by userspace */
427static inline int bpf_map_attr_numa_node(const union bpf_attr *attr)
428{
429 return (attr->map_flags & BPF_F_NUMA_NODE) ?
430 attr->numa_node : NUMA_NO_NODE;
431}
432
040ee692
AV
433struct bpf_prog *bpf_prog_get_type_path(const char *name, enum bpf_prog_type type);
434
9c270af3 435#else /* !CONFIG_BPF_SYSCALL */
0fc174de
DB
436static inline struct bpf_prog *bpf_prog_get(u32 ufd)
437{
438 return ERR_PTR(-EOPNOTSUPP);
439}
440
248f346f
JK
441static inline struct bpf_prog *bpf_prog_get_type_dev(u32 ufd,
442 enum bpf_prog_type type,
288b3de5 443 bool attach_drv)
248f346f
JK
444{
445 return ERR_PTR(-EOPNOTSUPP);
446}
447
6d67942d
DB
448static inline struct bpf_prog * __must_check bpf_prog_add(struct bpf_prog *prog,
449 int i)
cc2e0b3f
BB
450{
451 return ERR_PTR(-EOPNOTSUPP);
452}
113214be 453
c540594f
DB
454static inline void bpf_prog_sub(struct bpf_prog *prog, int i)
455{
456}
457
0fc174de
DB
458static inline void bpf_prog_put(struct bpf_prog *prog)
459{
460}
6d67942d
DB
461
462static inline struct bpf_prog * __must_check bpf_prog_inc(struct bpf_prog *prog)
aa6a5f3c
AS
463{
464 return ERR_PTR(-EOPNOTSUPP);
465}
5ccb071e 466
a6f6df69
JF
467static inline struct bpf_prog *__must_check
468bpf_prog_inc_not_zero(struct bpf_prog *prog)
469{
470 return ERR_PTR(-EOPNOTSUPP);
471}
472
5ccb071e
DB
473static inline int __bpf_prog_charge(struct user_struct *user, u32 pages)
474{
475 return 0;
476}
477
478static inline void __bpf_prog_uncharge(struct user_struct *user, u32 pages)
479{
480}
46f55cff 481
6e71b04a 482static inline int bpf_obj_get_user(const char __user *pathname, int flags)
98589a09
SL
483{
484 return -EOPNOTSUPP;
485}
486
46f55cff
JF
487static inline struct net_device *__dev_map_lookup_elem(struct bpf_map *map,
488 u32 key)
489{
490 return NULL;
491}
492
493static inline void __dev_map_insert_ctx(struct bpf_map *map, u32 index)
494{
495}
496
497static inline void __dev_map_flush(struct bpf_map *map)
498{
499}
9c270af3
JDB
500
501static inline
502struct bpf_cpu_map_entry *__cpu_map_lookup_elem(struct bpf_map *map, u32 key)
503{
504 return NULL;
505}
506
507static inline void __cpu_map_insert_ctx(struct bpf_map *map, u32 index)
508{
509}
510
511static inline void __cpu_map_flush(struct bpf_map *map)
512{
513}
514
515struct xdp_buff;
516static inline int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu,
517 struct xdp_buff *xdp,
518 struct net_device *dev_rx)
519{
520 return 0;
521}
040ee692
AV
522
523static inline struct bpf_prog *bpf_prog_get_type_path(const char *name,
524 enum bpf_prog_type type)
525{
526 return ERR_PTR(-EOPNOTSUPP);
527}
61e021f3 528#endif /* CONFIG_BPF_SYSCALL */
09756af4 529
479321e9
JK
530static inline struct bpf_prog *bpf_prog_get_type(u32 ufd,
531 enum bpf_prog_type type)
532{
533 return bpf_prog_get_type_dev(ufd, type, false);
534}
535
040ee692
AV
536bool bpf_prog_get_ok(struct bpf_prog *, enum bpf_prog_type *, bool);
537
ab3f0063
JK
538int bpf_prog_offload_compile(struct bpf_prog *prog);
539void bpf_prog_offload_destroy(struct bpf_prog *prog);
540
541#if defined(CONFIG_NET) && defined(CONFIG_BPF_SYSCALL)
542int bpf_prog_offload_init(struct bpf_prog *prog, union bpf_attr *attr);
543
544static inline bool bpf_prog_is_dev_bound(struct bpf_prog_aux *aux)
545{
546 return aux->offload;
547}
548#else
549static inline int bpf_prog_offload_init(struct bpf_prog *prog,
550 union bpf_attr *attr)
551{
552 return -EOPNOTSUPP;
553}
554
555static inline bool bpf_prog_is_dev_bound(struct bpf_prog_aux *aux)
556{
557 return false;
558}
559#endif /* CONFIG_NET && CONFIG_BPF_SYSCALL */
560
6bdc9c4c
JF
561#if defined(CONFIG_STREAM_PARSER) && defined(CONFIG_BPF_SYSCALL)
562struct sock *__sock_map_lookup_elem(struct bpf_map *map, u32 key);
5a67da2a 563int sock_map_prog(struct bpf_map *map, struct bpf_prog *prog, u32 type);
6bdc9c4c
JF
564#else
565static inline struct sock *__sock_map_lookup_elem(struct bpf_map *map, u32 key)
566{
567 return NULL;
568}
464bc0fd 569
5a67da2a
JF
570static inline int sock_map_prog(struct bpf_map *map,
571 struct bpf_prog *prog,
572 u32 type)
464bc0fd
JF
573{
574 return -EOPNOTSUPP;
575}
6bdc9c4c
JF
576#endif
577
d0003ec0 578/* verifier prototypes for helper functions called from eBPF programs */
a2c83fff
DB
579extern const struct bpf_func_proto bpf_map_lookup_elem_proto;
580extern const struct bpf_func_proto bpf_map_update_elem_proto;
581extern const struct bpf_func_proto bpf_map_delete_elem_proto;
d0003ec0 582
03e69b50 583extern const struct bpf_func_proto bpf_get_prandom_u32_proto;
c04167ce 584extern const struct bpf_func_proto bpf_get_smp_processor_id_proto;
2d0e30c3 585extern const struct bpf_func_proto bpf_get_numa_node_id_proto;
04fd61ab 586extern const struct bpf_func_proto bpf_tail_call_proto;
17ca8cbf 587extern const struct bpf_func_proto bpf_ktime_get_ns_proto;
ffeedafb
AS
588extern const struct bpf_func_proto bpf_get_current_pid_tgid_proto;
589extern const struct bpf_func_proto bpf_get_current_uid_gid_proto;
590extern const struct bpf_func_proto bpf_get_current_comm_proto;
4e10df9a
AS
591extern const struct bpf_func_proto bpf_skb_vlan_push_proto;
592extern const struct bpf_func_proto bpf_skb_vlan_pop_proto;
d5a3b1f6 593extern const struct bpf_func_proto bpf_get_stackid_proto;
174a79ff 594extern const struct bpf_func_proto bpf_sock_map_update_proto;
03e69b50 595
3ad00405
DB
596/* Shared helpers among cBPF and eBPF. */
597void bpf_user_rnd_init_once(void);
598u64 bpf_user_rnd_u32(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
599
99c55f7d 600#endif /* _LINUX_BPF_H */