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
9 #include <linux/workqueue.h>
10 #include <linux/file.h>
11 #include <linux/percpu.h>
12 #include <linux/err.h>
13 #include <linux/rbtree_latch.h>
14 #include <linux/numa.h>
15 #include <linux/wait.h>
16 #include <linux/u64_stats_sync.h>
17
18 struct bpf_verifier_env;
19 struct perf_event;
20 struct bpf_prog;
21 struct bpf_map;
22 struct sock;
23 struct seq_file;
24 struct btf;
25 struct btf_type;
26
27 extern struct idr btf_idr;
28 extern spinlock_t btf_idr_lock;
29
30 /* map is generic key/value storage optionally accesible by eBPF programs */
31 struct bpf_map_ops {
32 /* funcs callable from userspace (via syscall) */
33 int (*map_alloc_check)(union bpf_attr *attr);
34 struct bpf_map *(*map_alloc)(union bpf_attr *attr);
35 void (*map_release)(struct bpf_map *map, struct file *map_file);
36 void (*map_free)(struct bpf_map *map);
37 int (*map_get_next_key)(struct bpf_map *map, void *key, void *next_key);
38 void (*map_release_uref)(struct bpf_map *map);
39 void *(*map_lookup_elem_sys_only)(struct bpf_map *map, void *key);
40
41 /* funcs callable from userspace and from eBPF programs */
42 void *(*map_lookup_elem)(struct bpf_map *map, void *key);
43 int (*map_update_elem)(struct bpf_map *map, void *key, void *value, u64 flags);
44 int (*map_delete_elem)(struct bpf_map *map, void *key);
45 int (*map_push_elem)(struct bpf_map *map, void *value, u64 flags);
46 int (*map_pop_elem)(struct bpf_map *map, void *value);
47 int (*map_peek_elem)(struct bpf_map *map, void *value);
48
49 /* funcs called by prog_array and perf_event_array map */
50 void *(*map_fd_get_ptr)(struct bpf_map *map, struct file *map_file,
51 int fd);
52 void (*map_fd_put_ptr)(void *ptr);
53 u32 (*map_gen_lookup)(struct bpf_map *map, struct bpf_insn *insn_buf);
54 u32 (*map_fd_sys_lookup_elem)(void *ptr);
55 void (*map_seq_show_elem)(struct bpf_map *map, void *key,
56 struct seq_file *m);
57 int (*map_check_btf)(const struct bpf_map *map,
58 const struct btf *btf,
59 const struct btf_type *key_type,
60 const struct btf_type *value_type);
61
62 /* Direct value access helpers. */
63 int (*map_direct_value_addr)(const struct bpf_map *map,
64 u64 *imm, u32 off);
65 int (*map_direct_value_meta)(const struct bpf_map *map,
66 u64 imm, u32 *off);
67 };
68
69 struct bpf_map_memory {
70 u32 pages;
71 struct user_struct *user;
72 };
73
74 struct bpf_map {
75 /* The first two cachelines with read-mostly members of which some
76 * are also accessed in fast-path (e.g. ops, max_entries).
77 */
78 const struct bpf_map_ops *ops ____cacheline_aligned;
79 struct bpf_map *inner_map_meta;
80 #ifdef CONFIG_SECURITY
81 void *security;
82 #endif
83 enum bpf_map_type map_type;
84 u32 key_size;
85 u32 value_size;
86 u32 max_entries;
87 u32 map_flags;
88 int spin_lock_off; /* >=0 valid offset, <0 error */
89 u32 id;
90 int numa_node;
91 u32 btf_key_type_id;
92 u32 btf_value_type_id;
93 struct btf *btf;
94 struct bpf_map_memory memory;
95 bool unpriv_array;
96 bool frozen; /* write-once */
97 /* 48 bytes hole */
98
99 /* The 3rd and 4th cacheline with misc members to avoid false sharing
100 * particularly with refcounting.
101 */
102 atomic_t refcnt ____cacheline_aligned;
103 atomic_t usercnt;
104 struct work_struct work;
105 char name[BPF_OBJ_NAME_LEN];
106 };
107
map_value_has_spin_lock(const struct bpf_map * map)108 static inline bool map_value_has_spin_lock(const struct bpf_map *map)
109 {
110 return map->spin_lock_off >= 0;
111 }
112
check_and_init_map_lock(struct bpf_map * map,void * dst)113 static inline void check_and_init_map_lock(struct bpf_map *map, void *dst)
114 {
115 if (likely(!map_value_has_spin_lock(map)))
116 return;
117 *(struct bpf_spin_lock *)(dst + map->spin_lock_off) =
118 (struct bpf_spin_lock){};
119 }
120
121 /* copy everything but bpf_spin_lock */
copy_map_value(struct bpf_map * map,void * dst,void * src)122 static inline void copy_map_value(struct bpf_map *map, void *dst, void *src)
123 {
124 if (unlikely(map_value_has_spin_lock(map))) {
125 u32 off = map->spin_lock_off;
126
127 memcpy(dst, src, off);
128 memcpy(dst + off + sizeof(struct bpf_spin_lock),
129 src + off + sizeof(struct bpf_spin_lock),
130 map->value_size - off - sizeof(struct bpf_spin_lock));
131 } else {
132 memcpy(dst, src, map->value_size);
133 }
134 }
135 void copy_map_value_locked(struct bpf_map *map, void *dst, void *src,
136 bool lock_src);
137
138 struct bpf_offload_dev;
139 struct bpf_offloaded_map;
140
141 struct bpf_map_dev_ops {
142 int (*map_get_next_key)(struct bpf_offloaded_map *map,
143 void *key, void *next_key);
144 int (*map_lookup_elem)(struct bpf_offloaded_map *map,
145 void *key, void *value);
146 int (*map_update_elem)(struct bpf_offloaded_map *map,
147 void *key, void *value, u64 flags);
148 int (*map_delete_elem)(struct bpf_offloaded_map *map, void *key);
149 };
150
151 struct bpf_offloaded_map {
152 struct bpf_map map;
153 struct net_device *netdev;
154 const struct bpf_map_dev_ops *dev_ops;
155 void *dev_priv;
156 struct list_head offloads;
157 };
158
map_to_offmap(struct bpf_map * map)159 static inline struct bpf_offloaded_map *map_to_offmap(struct bpf_map *map)
160 {
161 return container_of(map, struct bpf_offloaded_map, map);
162 }
163
bpf_map_offload_neutral(const struct bpf_map * map)164 static inline bool bpf_map_offload_neutral(const struct bpf_map *map)
165 {
166 return map->map_type == BPF_MAP_TYPE_PERF_EVENT_ARRAY;
167 }
168
bpf_map_support_seq_show(const struct bpf_map * map)169 static inline bool bpf_map_support_seq_show(const struct bpf_map *map)
170 {
171 return map->btf && map->ops->map_seq_show_elem;
172 }
173
174 int map_check_no_btf(const struct bpf_map *map,
175 const struct btf *btf,
176 const struct btf_type *key_type,
177 const struct btf_type *value_type);
178
179 extern const struct bpf_map_ops bpf_map_offload_ops;
180
181 /* function argument constraints */
182 enum bpf_arg_type {
183 ARG_DONTCARE = 0, /* unused argument in helper function */
184
185 /* the following constraints used to prototype
186 * bpf_map_lookup/update/delete_elem() functions
187 */
188 ARG_CONST_MAP_PTR, /* const argument used as pointer to bpf_map */
189 ARG_PTR_TO_MAP_KEY, /* pointer to stack used as map key */
190 ARG_PTR_TO_MAP_VALUE, /* pointer to stack used as map value */
191 ARG_PTR_TO_UNINIT_MAP_VALUE, /* pointer to valid memory used to store a map value */
192 ARG_PTR_TO_MAP_VALUE_OR_NULL, /* pointer to stack used as map value or NULL */
193
194 /* the following constraints used to prototype bpf_memcmp() and other
195 * functions that access data on eBPF program stack
196 */
197 ARG_PTR_TO_MEM, /* pointer to valid memory (stack, packet, map value) */
198 ARG_PTR_TO_MEM_OR_NULL, /* pointer to valid memory or NULL */
199 ARG_PTR_TO_UNINIT_MEM, /* pointer to memory does not need to be initialized,
200 * helper function must fill all bytes or clear
201 * them in error case.
202 */
203
204 ARG_CONST_SIZE, /* number of bytes accessed from memory */
205 ARG_CONST_SIZE_OR_ZERO, /* number of bytes accessed from memory or 0 */
206
207 ARG_PTR_TO_CTX, /* pointer to context */
208 ARG_ANYTHING, /* any (initialized) argument is ok */
209 ARG_PTR_TO_SPIN_LOCK, /* pointer to bpf_spin_lock */
210 ARG_PTR_TO_SOCK_COMMON, /* pointer to sock_common */
211 ARG_PTR_TO_INT, /* pointer to int */
212 ARG_PTR_TO_LONG, /* pointer to long */
213 ARG_PTR_TO_SOCKET, /* pointer to bpf_sock (fullsock) */
214 };
215
216 /* type of values returned from helper functions */
217 enum bpf_return_type {
218 RET_INTEGER, /* function returns integer */
219 RET_VOID, /* function doesn't return anything */
220 RET_PTR_TO_MAP_VALUE, /* returns a pointer to map elem value */
221 RET_PTR_TO_MAP_VALUE_OR_NULL, /* returns a pointer to map elem value or NULL */
222 RET_PTR_TO_SOCKET_OR_NULL, /* returns a pointer to a socket or NULL */
223 RET_PTR_TO_TCP_SOCK_OR_NULL, /* returns a pointer to a tcp_sock or NULL */
224 RET_PTR_TO_SOCK_COMMON_OR_NULL, /* returns a pointer to a sock_common or NULL */
225 };
226
227 /* eBPF function prototype used by verifier to allow BPF_CALLs from eBPF programs
228 * to in-kernel helper functions and for adjusting imm32 field in BPF_CALL
229 * instructions after verifying
230 */
231 struct bpf_func_proto {
232 u64 (*func)(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
233 bool gpl_only;
234 bool pkt_access;
235 enum bpf_return_type ret_type;
236 enum bpf_arg_type arg1_type;
237 enum bpf_arg_type arg2_type;
238 enum bpf_arg_type arg3_type;
239 enum bpf_arg_type arg4_type;
240 enum bpf_arg_type arg5_type;
241 };
242
243 /* bpf_context is intentionally undefined structure. Pointer to bpf_context is
244 * the first argument to eBPF programs.
245 * For socket filters: 'struct bpf_context *' == 'struct sk_buff *'
246 */
247 struct bpf_context;
248
249 enum bpf_access_type {
250 BPF_READ = 1,
251 BPF_WRITE = 2
252 };
253
254 /* types of values stored in eBPF registers */
255 /* Pointer types represent:
256 * pointer
257 * pointer + imm
258 * pointer + (u16) var
259 * pointer + (u16) var + imm
260 * if (range > 0) then [ptr, ptr + range - off) is safe to access
261 * if (id > 0) means that some 'var' was added
262 * if (off > 0) means that 'imm' was added
263 */
264 enum bpf_reg_type {
265 NOT_INIT = 0, /* nothing was written into register */
266 SCALAR_VALUE, /* reg doesn't contain a valid pointer */
267 PTR_TO_CTX, /* reg points to bpf_context */
268 CONST_PTR_TO_MAP, /* reg points to struct bpf_map */
269 PTR_TO_MAP_VALUE, /* reg points to map element value */
270 PTR_TO_MAP_VALUE_OR_NULL,/* points to map elem value or NULL */
271 PTR_TO_STACK, /* reg == frame_pointer + offset */
272 PTR_TO_PACKET_META, /* skb->data - meta_len */
273 PTR_TO_PACKET, /* reg points to skb->data */
274 PTR_TO_PACKET_END, /* skb->data + headlen */
275 PTR_TO_FLOW_KEYS, /* reg points to bpf_flow_keys */
276 PTR_TO_SOCKET, /* reg points to struct bpf_sock */
277 PTR_TO_SOCKET_OR_NULL, /* reg points to struct bpf_sock or NULL */
278 PTR_TO_SOCK_COMMON, /* reg points to sock_common */
279 PTR_TO_SOCK_COMMON_OR_NULL, /* reg points to sock_common or NULL */
280 PTR_TO_TCP_SOCK, /* reg points to struct tcp_sock */
281 PTR_TO_TCP_SOCK_OR_NULL, /* reg points to struct tcp_sock or NULL */
282 PTR_TO_TP_BUFFER, /* reg points to a writable raw tp's buffer */
283 PTR_TO_XDP_SOCK, /* reg points to struct xdp_sock */
284 };
285
286 /* The information passed from prog-specific *_is_valid_access
287 * back to the verifier.
288 */
289 struct bpf_insn_access_aux {
290 enum bpf_reg_type reg_type;
291 int ctx_field_size;
292 };
293
294 static inline void
bpf_ctx_record_field_size(struct bpf_insn_access_aux * aux,u32 size)295 bpf_ctx_record_field_size(struct bpf_insn_access_aux *aux, u32 size)
296 {
297 aux->ctx_field_size = size;
298 }
299
300 struct bpf_prog_ops {
301 int (*test_run)(struct bpf_prog *prog, const union bpf_attr *kattr,
302 union bpf_attr __user *uattr);
303 };
304
305 struct bpf_verifier_ops {
306 /* return eBPF function prototype for verification */
307 const struct bpf_func_proto *
308 (*get_func_proto)(enum bpf_func_id func_id,
309 const struct bpf_prog *prog);
310
311 /* return true if 'size' wide access at offset 'off' within bpf_context
312 * with 'type' (read or write) is allowed
313 */
314 bool (*is_valid_access)(int off, int size, enum bpf_access_type type,
315 const struct bpf_prog *prog,
316 struct bpf_insn_access_aux *info);
317 int (*gen_prologue)(struct bpf_insn *insn, bool direct_write,
318 const struct bpf_prog *prog);
319 int (*gen_ld_abs)(const struct bpf_insn *orig,
320 struct bpf_insn *insn_buf);
321 u32 (*convert_ctx_access)(enum bpf_access_type type,
322 const struct bpf_insn *src,
323 struct bpf_insn *dst,
324 struct bpf_prog *prog, u32 *target_size);
325 };
326
327 struct bpf_prog_offload_ops {
328 /* verifier basic callbacks */
329 int (*insn_hook)(struct bpf_verifier_env *env,
330 int insn_idx, int prev_insn_idx);
331 int (*finalize)(struct bpf_verifier_env *env);
332 /* verifier optimization callbacks (called after .finalize) */
333 int (*replace_insn)(struct bpf_verifier_env *env, u32 off,
334 struct bpf_insn *insn);
335 int (*remove_insns)(struct bpf_verifier_env *env, u32 off, u32 cnt);
336 /* program management callbacks */
337 int (*prepare)(struct bpf_prog *prog);
338 int (*translate)(struct bpf_prog *prog);
339 void (*destroy)(struct bpf_prog *prog);
340 };
341
342 struct bpf_prog_offload {
343 struct bpf_prog *prog;
344 struct net_device *netdev;
345 struct bpf_offload_dev *offdev;
346 void *dev_priv;
347 struct list_head offloads;
348 bool dev_state;
349 bool opt_failed;
350 void *jited_image;
351 u32 jited_len;
352 };
353
354 enum bpf_cgroup_storage_type {
355 BPF_CGROUP_STORAGE_SHARED,
356 BPF_CGROUP_STORAGE_PERCPU,
357 __BPF_CGROUP_STORAGE_MAX
358 };
359
360 #define MAX_BPF_CGROUP_STORAGE_TYPE __BPF_CGROUP_STORAGE_MAX
361
362 struct bpf_prog_stats {
363 u64 cnt;
364 u64 nsecs;
365 struct u64_stats_sync syncp;
366 };
367
368 struct bpf_prog_aux {
369 atomic_t refcnt;
370 u32 used_map_cnt;
371 u32 max_ctx_offset;
372 u32 max_pkt_offset;
373 u32 max_tp_access;
374 u32 stack_depth;
375 u32 id;
376 u32 func_cnt; /* used by non-func prog as the number of func progs */
377 u32 func_idx; /* 0 for non-func prog, the index in func array for func prog */
378 bool verifier_zext; /* Zero extensions has been inserted by verifier. */
379 bool offload_requested;
380 struct bpf_prog **func;
381 void *jit_data; /* JIT specific data. arch dependent */
382 struct latch_tree_node ksym_tnode;
383 struct list_head ksym_lnode;
384 const struct bpf_prog_ops *ops;
385 struct bpf_map **used_maps;
386 struct bpf_prog *prog;
387 struct user_struct *user;
388 u64 load_time; /* ns since boottime */
389 struct bpf_map *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE];
390 char name[BPF_OBJ_NAME_LEN];
391 #ifdef CONFIG_SECURITY
392 void *security;
393 #endif
394 struct bpf_prog_offload *offload;
395 struct btf *btf;
396 struct bpf_func_info *func_info;
397 /* bpf_line_info loaded from userspace. linfo->insn_off
398 * has the xlated insn offset.
399 * Both the main and sub prog share the same linfo.
400 * The subprog can access its first linfo by
401 * using the linfo_idx.
402 */
403 struct bpf_line_info *linfo;
404 /* jited_linfo is the jited addr of the linfo. It has a
405 * one to one mapping to linfo:
406 * jited_linfo[i] is the jited addr for the linfo[i]->insn_off.
407 * Both the main and sub prog share the same jited_linfo.
408 * The subprog can access its first jited_linfo by
409 * using the linfo_idx.
410 */
411 void **jited_linfo;
412 u32 func_info_cnt;
413 u32 nr_linfo;
414 /* subprog can use linfo_idx to access its first linfo and
415 * jited_linfo.
416 * main prog always has linfo_idx == 0
417 */
418 u32 linfo_idx;
419 struct bpf_prog_stats __percpu *stats;
420 union {
421 struct work_struct work;
422 struct rcu_head rcu;
423 };
424 };
425
426 struct bpf_array {
427 struct bpf_map map;
428 u32 elem_size;
429 u32 index_mask;
430 /* 'ownership' of prog_array is claimed by the first program that
431 * is going to use this map or by the first program which FD is stored
432 * in the map to make sure that all callers and callees have the same
433 * prog_type and JITed flag
434 */
435 enum bpf_prog_type owner_prog_type;
436 bool owner_jited;
437 union {
438 char value[0] __aligned(8);
439 void *ptrs[0] __aligned(8);
440 void __percpu *pptrs[0] __aligned(8);
441 };
442 };
443
444 #define BPF_COMPLEXITY_LIMIT_INSNS 1000000 /* yes. 1M insns */
445 #define MAX_TAIL_CALL_CNT 32
446
447 #define BPF_F_ACCESS_MASK (BPF_F_RDONLY | \
448 BPF_F_RDONLY_PROG | \
449 BPF_F_WRONLY | \
450 BPF_F_WRONLY_PROG)
451
452 #define BPF_MAP_CAN_READ BIT(0)
453 #define BPF_MAP_CAN_WRITE BIT(1)
454
bpf_map_flags_to_cap(struct bpf_map * map)455 static inline u32 bpf_map_flags_to_cap(struct bpf_map *map)
456 {
457 u32 access_flags = map->map_flags & (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG);
458
459 /* Combination of BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG is
460 * not possible.
461 */
462 if (access_flags & BPF_F_RDONLY_PROG)
463 return BPF_MAP_CAN_READ;
464 else if (access_flags & BPF_F_WRONLY_PROG)
465 return BPF_MAP_CAN_WRITE;
466 else
467 return BPF_MAP_CAN_READ | BPF_MAP_CAN_WRITE;
468 }
469
bpf_map_flags_access_ok(u32 access_flags)470 static inline bool bpf_map_flags_access_ok(u32 access_flags)
471 {
472 return (access_flags & (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG)) !=
473 (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG);
474 }
475
476 struct bpf_event_entry {
477 struct perf_event *event;
478 struct file *perf_file;
479 struct file *map_file;
480 struct rcu_head rcu;
481 };
482
483 bool bpf_prog_array_compatible(struct bpf_array *array, const struct bpf_prog *fp);
484 int bpf_prog_calc_tag(struct bpf_prog *fp);
485
486 const struct bpf_func_proto *bpf_get_trace_printk_proto(void);
487
488 typedef unsigned long (*bpf_ctx_copy_t)(void *dst, const void *src,
489 unsigned long off, unsigned long len);
490 typedef u32 (*bpf_convert_ctx_access_t)(enum bpf_access_type type,
491 const struct bpf_insn *src,
492 struct bpf_insn *dst,
493 struct bpf_prog *prog,
494 u32 *target_size);
495
496 u64 bpf_event_output(struct bpf_map *map, u64 flags, void *meta, u64 meta_size,
497 void *ctx, u64 ctx_size, bpf_ctx_copy_t ctx_copy);
498
499 /* an array of programs to be executed under rcu_lock.
500 *
501 * Typical usage:
502 * ret = BPF_PROG_RUN_ARRAY(&bpf_prog_array, ctx, BPF_PROG_RUN);
503 *
504 * the structure returned by bpf_prog_array_alloc() should be populated
505 * with program pointers and the last pointer must be NULL.
506 * The user has to keep refcnt on the program and make sure the program
507 * is removed from the array before bpf_prog_put().
508 * The 'struct bpf_prog_array *' should only be replaced with xchg()
509 * since other cpus are walking the array of pointers in parallel.
510 */
511 struct bpf_prog_array_item {
512 struct bpf_prog *prog;
513 struct bpf_cgroup_storage *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE];
514 };
515
516 struct bpf_prog_array {
517 struct rcu_head rcu;
518 struct bpf_prog_array_item items[0];
519 };
520
521 struct bpf_prog_array *bpf_prog_array_alloc(u32 prog_cnt, gfp_t flags);
522 void bpf_prog_array_free(struct bpf_prog_array *progs);
523 int bpf_prog_array_length(struct bpf_prog_array *progs);
524 bool bpf_prog_array_is_empty(struct bpf_prog_array *array);
525 int bpf_prog_array_copy_to_user(struct bpf_prog_array *progs,
526 __u32 __user *prog_ids, u32 cnt);
527
528 void bpf_prog_array_delete_safe(struct bpf_prog_array *progs,
529 struct bpf_prog *old_prog);
530 int bpf_prog_array_copy_info(struct bpf_prog_array *array,
531 u32 *prog_ids, u32 request_cnt,
532 u32 *prog_cnt);
533 int bpf_prog_array_copy(struct bpf_prog_array *old_array,
534 struct bpf_prog *exclude_prog,
535 struct bpf_prog *include_prog,
536 struct bpf_prog_array **new_array);
537
538 #define __BPF_PROG_RUN_ARRAY(array, ctx, func, check_non_null, set_cg_storage) \
539 ({ \
540 struct bpf_prog_array_item *_item; \
541 struct bpf_prog *_prog; \
542 struct bpf_prog_array *_array; \
543 u32 _ret = 1; \
544 preempt_disable(); \
545 rcu_read_lock(); \
546 _array = rcu_dereference(array); \
547 if (unlikely(check_non_null && !_array))\
548 goto _out; \
549 _item = &_array->items[0]; \
550 while ((_prog = READ_ONCE(_item->prog))) { \
551 if (set_cg_storage) \
552 bpf_cgroup_storage_set(_item->cgroup_storage); \
553 _ret &= func(_prog, ctx); \
554 _item++; \
555 } \
556 _out: \
557 rcu_read_unlock(); \
558 preempt_enable(); \
559 _ret; \
560 })
561
562 /* To be used by __cgroup_bpf_run_filter_skb for EGRESS BPF progs
563 * so BPF programs can request cwr for TCP packets.
564 *
565 * Current cgroup skb programs can only return 0 or 1 (0 to drop the
566 * packet. This macro changes the behavior so the low order bit
567 * indicates whether the packet should be dropped (0) or not (1)
568 * and the next bit is a congestion notification bit. This could be
569 * used by TCP to call tcp_enter_cwr()
570 *
571 * Hence, new allowed return values of CGROUP EGRESS BPF programs are:
572 * 0: drop packet
573 * 1: keep packet
574 * 2: drop packet and cn
575 * 3: keep packet and cn
576 *
577 * This macro then converts it to one of the NET_XMIT or an error
578 * code that is then interpreted as drop packet (and no cn):
579 * 0: NET_XMIT_SUCCESS skb should be transmitted
580 * 1: NET_XMIT_DROP skb should be dropped and cn
581 * 2: NET_XMIT_CN skb should be transmitted and cn
582 * 3: -EPERM skb should be dropped
583 */
584 #define BPF_PROG_CGROUP_INET_EGRESS_RUN_ARRAY(array, ctx, func) \
585 ({ \
586 struct bpf_prog_array_item *_item; \
587 struct bpf_prog *_prog; \
588 struct bpf_prog_array *_array; \
589 u32 ret; \
590 u32 _ret = 1; \
591 u32 _cn = 0; \
592 preempt_disable(); \
593 rcu_read_lock(); \
594 _array = rcu_dereference(array); \
595 _item = &_array->items[0]; \
596 while ((_prog = READ_ONCE(_item->prog))) { \
597 bpf_cgroup_storage_set(_item->cgroup_storage); \
598 ret = func(_prog, ctx); \
599 _ret &= (ret & 1); \
600 _cn |= (ret & 2); \
601 _item++; \
602 } \
603 rcu_read_unlock(); \
604 preempt_enable(); \
605 if (_ret) \
606 _ret = (_cn ? NET_XMIT_CN : NET_XMIT_SUCCESS); \
607 else \
608 _ret = (_cn ? NET_XMIT_DROP : -EPERM); \
609 _ret; \
610 })
611
612 #define BPF_PROG_RUN_ARRAY(array, ctx, func) \
613 __BPF_PROG_RUN_ARRAY(array, ctx, func, false, true)
614
615 #define BPF_PROG_RUN_ARRAY_CHECK(array, ctx, func) \
616 __BPF_PROG_RUN_ARRAY(array, ctx, func, true, false)
617
618 #ifdef CONFIG_BPF_SYSCALL
619 DECLARE_PER_CPU(int, bpf_prog_active);
620
621 extern const struct file_operations bpf_map_fops;
622 extern const struct file_operations bpf_prog_fops;
623
624 #define BPF_PROG_TYPE(_id, _name) \
625 extern const struct bpf_prog_ops _name ## _prog_ops; \
626 extern const struct bpf_verifier_ops _name ## _verifier_ops;
627 #define BPF_MAP_TYPE(_id, _ops) \
628 extern const struct bpf_map_ops _ops;
629 #include <linux/bpf_types.h>
630 #undef BPF_PROG_TYPE
631 #undef BPF_MAP_TYPE
632
633 extern const struct bpf_prog_ops bpf_offload_prog_ops;
634 extern const struct bpf_verifier_ops tc_cls_act_analyzer_ops;
635 extern const struct bpf_verifier_ops xdp_analyzer_ops;
636
637 struct bpf_prog *bpf_prog_get(u32 ufd);
638 struct bpf_prog *bpf_prog_get_type_dev(u32 ufd, enum bpf_prog_type type,
639 bool attach_drv);
640 struct bpf_prog * __must_check bpf_prog_add(struct bpf_prog *prog, int i);
641 void bpf_prog_sub(struct bpf_prog *prog, int i);
642 struct bpf_prog * __must_check bpf_prog_inc(struct bpf_prog *prog);
643 struct bpf_prog * __must_check bpf_prog_inc_not_zero(struct bpf_prog *prog);
644 void bpf_prog_put(struct bpf_prog *prog);
645 int __bpf_prog_charge(struct user_struct *user, u32 pages);
646 void __bpf_prog_uncharge(struct user_struct *user, u32 pages);
647
648 void bpf_prog_free_id(struct bpf_prog *prog, bool do_idr_lock);
649 void bpf_map_free_id(struct bpf_map *map, bool do_idr_lock);
650
651 struct bpf_map *bpf_map_get_with_uref(u32 ufd);
652 struct bpf_map *__bpf_map_get(struct fd f);
653 struct bpf_map * __must_check bpf_map_inc(struct bpf_map *map, bool uref);
654 struct bpf_map * __must_check bpf_map_inc_not_zero(struct bpf_map *map,
655 bool uref);
656 void bpf_map_put_with_uref(struct bpf_map *map);
657 void bpf_map_put(struct bpf_map *map);
658 int bpf_map_charge_memlock(struct bpf_map *map, u32 pages);
659 void bpf_map_uncharge_memlock(struct bpf_map *map, u32 pages);
660 int bpf_map_charge_init(struct bpf_map_memory *mem, u64 size);
661 void bpf_map_charge_finish(struct bpf_map_memory *mem);
662 void bpf_map_charge_move(struct bpf_map_memory *dst,
663 struct bpf_map_memory *src);
664 void *bpf_map_area_alloc(u64 size, int numa_node);
665 void bpf_map_area_free(void *base);
666 void bpf_map_init_from_attr(struct bpf_map *map, union bpf_attr *attr);
667
668 extern int sysctl_unprivileged_bpf_disabled;
669
670 int bpf_map_new_fd(struct bpf_map *map, int flags);
671 int bpf_prog_new_fd(struct bpf_prog *prog);
672
673 int bpf_obj_pin_user(u32 ufd, const char __user *pathname);
674 int bpf_obj_get_user(const char __user *pathname, int flags);
675
676 int bpf_percpu_hash_copy(struct bpf_map *map, void *key, void *value);
677 int bpf_percpu_array_copy(struct bpf_map *map, void *key, void *value);
678 int bpf_percpu_hash_update(struct bpf_map *map, void *key, void *value,
679 u64 flags);
680 int bpf_percpu_array_update(struct bpf_map *map, void *key, void *value,
681 u64 flags);
682
683 int bpf_stackmap_copy(struct bpf_map *map, void *key, void *value);
684
685 int bpf_fd_array_map_update_elem(struct bpf_map *map, struct file *map_file,
686 void *key, void *value, u64 map_flags);
687 int bpf_fd_array_map_lookup_elem(struct bpf_map *map, void *key, u32 *value);
688 int bpf_fd_htab_map_update_elem(struct bpf_map *map, struct file *map_file,
689 void *key, void *value, u64 map_flags);
690 int bpf_fd_htab_map_lookup_elem(struct bpf_map *map, void *key, u32 *value);
691
692 int bpf_get_file_flag(int flags);
693 int bpf_check_uarg_tail_zero(void __user *uaddr, size_t expected_size,
694 size_t actual_size);
695
696 /* memcpy that is used with 8-byte aligned pointers, power-of-8 size and
697 * forced to use 'long' read/writes to try to atomically copy long counters.
698 * Best-effort only. No barriers here, since it _will_ race with concurrent
699 * updates from BPF programs. Called from bpf syscall and mostly used with
700 * size 8 or 16 bytes, so ask compiler to inline it.
701 */
bpf_long_memcpy(void * dst,const void * src,u32 size)702 static inline void bpf_long_memcpy(void *dst, const void *src, u32 size)
703 {
704 const long *lsrc = src;
705 long *ldst = dst;
706
707 size /= sizeof(long);
708 while (size--)
709 *ldst++ = *lsrc++;
710 }
711
712 /* verify correctness of eBPF program */
713 int bpf_check(struct bpf_prog **fp, union bpf_attr *attr,
714 union bpf_attr __user *uattr);
715
716 #ifndef CONFIG_BPF_JIT_ALWAYS_ON
717 void bpf_patch_call_args(struct bpf_insn *insn, u32 stack_depth);
718 #endif
719
720 /* Map specifics */
721 struct xdp_buff;
722 struct sk_buff;
723
724 struct bpf_dtab_netdev *__dev_map_lookup_elem(struct bpf_map *map, u32 key);
725 struct bpf_dtab_netdev *__dev_map_hash_lookup_elem(struct bpf_map *map, u32 key);
726 void __dev_map_flush(struct bpf_map *map);
727 int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp,
728 struct net_device *dev_rx);
729 int dev_map_generic_redirect(struct bpf_dtab_netdev *dst, struct sk_buff *skb,
730 struct bpf_prog *xdp_prog);
731
732 struct bpf_cpu_map_entry *__cpu_map_lookup_elem(struct bpf_map *map, u32 key);
733 void __cpu_map_flush(struct bpf_map *map);
734 int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu, struct xdp_buff *xdp,
735 struct net_device *dev_rx);
736
737 /* Return map's numa specified by userspace */
bpf_map_attr_numa_node(const union bpf_attr * attr)738 static inline int bpf_map_attr_numa_node(const union bpf_attr *attr)
739 {
740 return (attr->map_flags & BPF_F_NUMA_NODE) ?
741 attr->numa_node : NUMA_NO_NODE;
742 }
743
744 struct bpf_prog *bpf_prog_get_type_path(const char *name, enum bpf_prog_type type);
745 int array_map_alloc_check(union bpf_attr *attr);
746
747 int bpf_prog_test_run_xdp(struct bpf_prog *prog, const union bpf_attr *kattr,
748 union bpf_attr __user *uattr);
749 int bpf_prog_test_run_skb(struct bpf_prog *prog, const union bpf_attr *kattr,
750 union bpf_attr __user *uattr);
751 int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog,
752 const union bpf_attr *kattr,
753 union bpf_attr __user *uattr);
754
unprivileged_ebpf_enabled(void)755 static inline bool unprivileged_ebpf_enabled(void)
756 {
757 return !sysctl_unprivileged_bpf_disabled;
758 }
759
760 #else /* !CONFIG_BPF_SYSCALL */
bpf_prog_get(u32 ufd)761 static inline struct bpf_prog *bpf_prog_get(u32 ufd)
762 {
763 return ERR_PTR(-EOPNOTSUPP);
764 }
765
bpf_prog_get_type_dev(u32 ufd,enum bpf_prog_type type,bool attach_drv)766 static inline struct bpf_prog *bpf_prog_get_type_dev(u32 ufd,
767 enum bpf_prog_type type,
768 bool attach_drv)
769 {
770 return ERR_PTR(-EOPNOTSUPP);
771 }
772
bpf_prog_add(struct bpf_prog * prog,int i)773 static inline struct bpf_prog * __must_check bpf_prog_add(struct bpf_prog *prog,
774 int i)
775 {
776 return ERR_PTR(-EOPNOTSUPP);
777 }
778
bpf_prog_sub(struct bpf_prog * prog,int i)779 static inline void bpf_prog_sub(struct bpf_prog *prog, int i)
780 {
781 }
782
bpf_prog_put(struct bpf_prog * prog)783 static inline void bpf_prog_put(struct bpf_prog *prog)
784 {
785 }
786
bpf_prog_inc(struct bpf_prog * prog)787 static inline struct bpf_prog * __must_check bpf_prog_inc(struct bpf_prog *prog)
788 {
789 return ERR_PTR(-EOPNOTSUPP);
790 }
791
792 static inline struct bpf_prog *__must_check
bpf_prog_inc_not_zero(struct bpf_prog * prog)793 bpf_prog_inc_not_zero(struct bpf_prog *prog)
794 {
795 return ERR_PTR(-EOPNOTSUPP);
796 }
797
__bpf_prog_charge(struct user_struct * user,u32 pages)798 static inline int __bpf_prog_charge(struct user_struct *user, u32 pages)
799 {
800 return 0;
801 }
802
__bpf_prog_uncharge(struct user_struct * user,u32 pages)803 static inline void __bpf_prog_uncharge(struct user_struct *user, u32 pages)
804 {
805 }
806
bpf_obj_get_user(const char __user * pathname,int flags)807 static inline int bpf_obj_get_user(const char __user *pathname, int flags)
808 {
809 return -EOPNOTSUPP;
810 }
811
__dev_map_lookup_elem(struct bpf_map * map,u32 key)812 static inline struct net_device *__dev_map_lookup_elem(struct bpf_map *map,
813 u32 key)
814 {
815 return NULL;
816 }
817
__dev_map_hash_lookup_elem(struct bpf_map * map,u32 key)818 static inline struct net_device *__dev_map_hash_lookup_elem(struct bpf_map *map,
819 u32 key)
820 {
821 return NULL;
822 }
823
__dev_map_flush(struct bpf_map * map)824 static inline void __dev_map_flush(struct bpf_map *map)
825 {
826 }
827
828 struct xdp_buff;
829 struct bpf_dtab_netdev;
830
831 static inline
dev_map_enqueue(struct bpf_dtab_netdev * dst,struct xdp_buff * xdp,struct net_device * dev_rx)832 int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp,
833 struct net_device *dev_rx)
834 {
835 return 0;
836 }
837
838 struct sk_buff;
839
dev_map_generic_redirect(struct bpf_dtab_netdev * dst,struct sk_buff * skb,struct bpf_prog * xdp_prog)840 static inline int dev_map_generic_redirect(struct bpf_dtab_netdev *dst,
841 struct sk_buff *skb,
842 struct bpf_prog *xdp_prog)
843 {
844 return 0;
845 }
846
847 static inline
__cpu_map_lookup_elem(struct bpf_map * map,u32 key)848 struct bpf_cpu_map_entry *__cpu_map_lookup_elem(struct bpf_map *map, u32 key)
849 {
850 return NULL;
851 }
852
__cpu_map_flush(struct bpf_map * map)853 static inline void __cpu_map_flush(struct bpf_map *map)
854 {
855 }
856
cpu_map_enqueue(struct bpf_cpu_map_entry * rcpu,struct xdp_buff * xdp,struct net_device * dev_rx)857 static inline int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu,
858 struct xdp_buff *xdp,
859 struct net_device *dev_rx)
860 {
861 return 0;
862 }
863
bpf_prog_get_type_path(const char * name,enum bpf_prog_type type)864 static inline struct bpf_prog *bpf_prog_get_type_path(const char *name,
865 enum bpf_prog_type type)
866 {
867 return ERR_PTR(-EOPNOTSUPP);
868 }
869
bpf_prog_test_run_xdp(struct bpf_prog * prog,const union bpf_attr * kattr,union bpf_attr __user * uattr)870 static inline int bpf_prog_test_run_xdp(struct bpf_prog *prog,
871 const union bpf_attr *kattr,
872 union bpf_attr __user *uattr)
873 {
874 return -ENOTSUPP;
875 }
876
bpf_prog_test_run_skb(struct bpf_prog * prog,const union bpf_attr * kattr,union bpf_attr __user * uattr)877 static inline int bpf_prog_test_run_skb(struct bpf_prog *prog,
878 const union bpf_attr *kattr,
879 union bpf_attr __user *uattr)
880 {
881 return -ENOTSUPP;
882 }
883
bpf_prog_test_run_flow_dissector(struct bpf_prog * prog,const union bpf_attr * kattr,union bpf_attr __user * uattr)884 static inline int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog,
885 const union bpf_attr *kattr,
886 union bpf_attr __user *uattr)
887 {
888 return -ENOTSUPP;
889 }
890
unprivileged_ebpf_enabled(void)891 static inline bool unprivileged_ebpf_enabled(void)
892 {
893 return false;
894 }
895
896 #endif /* CONFIG_BPF_SYSCALL */
897
bpf_prog_get_type(u32 ufd,enum bpf_prog_type type)898 static inline struct bpf_prog *bpf_prog_get_type(u32 ufd,
899 enum bpf_prog_type type)
900 {
901 return bpf_prog_get_type_dev(ufd, type, false);
902 }
903
904 bool bpf_prog_get_ok(struct bpf_prog *, enum bpf_prog_type *, bool);
905
906 int bpf_prog_offload_compile(struct bpf_prog *prog);
907 void bpf_prog_offload_destroy(struct bpf_prog *prog);
908 int bpf_prog_offload_info_fill(struct bpf_prog_info *info,
909 struct bpf_prog *prog);
910
911 int bpf_map_offload_info_fill(struct bpf_map_info *info, struct bpf_map *map);
912
913 int bpf_map_offload_lookup_elem(struct bpf_map *map, void *key, void *value);
914 int bpf_map_offload_update_elem(struct bpf_map *map,
915 void *key, void *value, u64 flags);
916 int bpf_map_offload_delete_elem(struct bpf_map *map, void *key);
917 int bpf_map_offload_get_next_key(struct bpf_map *map,
918 void *key, void *next_key);
919
920 bool bpf_offload_prog_map_match(struct bpf_prog *prog, struct bpf_map *map);
921
922 struct bpf_offload_dev *
923 bpf_offload_dev_create(const struct bpf_prog_offload_ops *ops, void *priv);
924 void bpf_offload_dev_destroy(struct bpf_offload_dev *offdev);
925 void *bpf_offload_dev_priv(struct bpf_offload_dev *offdev);
926 int bpf_offload_dev_netdev_register(struct bpf_offload_dev *offdev,
927 struct net_device *netdev);
928 void bpf_offload_dev_netdev_unregister(struct bpf_offload_dev *offdev,
929 struct net_device *netdev);
930 bool bpf_offload_dev_match(struct bpf_prog *prog, struct net_device *netdev);
931
932 void unpriv_ebpf_notify(int new_state);
933
934 #if defined(CONFIG_NET) && defined(CONFIG_BPF_SYSCALL)
935 int bpf_prog_offload_init(struct bpf_prog *prog, union bpf_attr *attr);
936
bpf_prog_is_dev_bound(const struct bpf_prog_aux * aux)937 static inline bool bpf_prog_is_dev_bound(const struct bpf_prog_aux *aux)
938 {
939 return aux->offload_requested;
940 }
941
bpf_map_is_dev_bound(struct bpf_map * map)942 static inline bool bpf_map_is_dev_bound(struct bpf_map *map)
943 {
944 return unlikely(map->ops == &bpf_map_offload_ops);
945 }
946
947 struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr);
948 void bpf_map_offload_map_free(struct bpf_map *map);
949 #else
bpf_prog_offload_init(struct bpf_prog * prog,union bpf_attr * attr)950 static inline int bpf_prog_offload_init(struct bpf_prog *prog,
951 union bpf_attr *attr)
952 {
953 return -EOPNOTSUPP;
954 }
955
bpf_prog_is_dev_bound(struct bpf_prog_aux * aux)956 static inline bool bpf_prog_is_dev_bound(struct bpf_prog_aux *aux)
957 {
958 return false;
959 }
960
bpf_map_is_dev_bound(struct bpf_map * map)961 static inline bool bpf_map_is_dev_bound(struct bpf_map *map)
962 {
963 return false;
964 }
965
bpf_map_offload_map_alloc(union bpf_attr * attr)966 static inline struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr)
967 {
968 return ERR_PTR(-EOPNOTSUPP);
969 }
970
bpf_map_offload_map_free(struct bpf_map * map)971 static inline void bpf_map_offload_map_free(struct bpf_map *map)
972 {
973 }
974 #endif /* CONFIG_NET && CONFIG_BPF_SYSCALL */
975
976 #if defined(CONFIG_BPF_STREAM_PARSER)
977 int sock_map_prog_update(struct bpf_map *map, struct bpf_prog *prog,
978 struct bpf_prog *old, u32 which);
979 int sock_map_get_from_fd(const union bpf_attr *attr, struct bpf_prog *prog);
980 int sock_map_prog_detach(const union bpf_attr *attr, enum bpf_prog_type ptype);
981 #else
sock_map_prog_update(struct bpf_map * map,struct bpf_prog * prog,struct bpf_prog * old,u32 which)982 static inline int sock_map_prog_update(struct bpf_map *map,
983 struct bpf_prog *prog,
984 struct bpf_prog *old, u32 which)
985 {
986 return -EOPNOTSUPP;
987 }
988
sock_map_get_from_fd(const union bpf_attr * attr,struct bpf_prog * prog)989 static inline int sock_map_get_from_fd(const union bpf_attr *attr,
990 struct bpf_prog *prog)
991 {
992 return -EINVAL;
993 }
994
sock_map_prog_detach(const union bpf_attr * attr,enum bpf_prog_type ptype)995 static inline int sock_map_prog_detach(const union bpf_attr *attr,
996 enum bpf_prog_type ptype)
997 {
998 return -EOPNOTSUPP;
999 }
1000 #endif
1001
1002 #if defined(CONFIG_XDP_SOCKETS)
1003 struct xdp_sock;
1004 struct xdp_sock *__xsk_map_lookup_elem(struct bpf_map *map, u32 key);
1005 int __xsk_map_redirect(struct bpf_map *map, struct xdp_buff *xdp,
1006 struct xdp_sock *xs);
1007 void __xsk_map_flush(struct bpf_map *map);
1008 #else
1009 struct xdp_sock;
__xsk_map_lookup_elem(struct bpf_map * map,u32 key)1010 static inline struct xdp_sock *__xsk_map_lookup_elem(struct bpf_map *map,
1011 u32 key)
1012 {
1013 return NULL;
1014 }
1015
__xsk_map_redirect(struct bpf_map * map,struct xdp_buff * xdp,struct xdp_sock * xs)1016 static inline int __xsk_map_redirect(struct bpf_map *map, struct xdp_buff *xdp,
1017 struct xdp_sock *xs)
1018 {
1019 return -EOPNOTSUPP;
1020 }
1021
__xsk_map_flush(struct bpf_map * map)1022 static inline void __xsk_map_flush(struct bpf_map *map)
1023 {
1024 }
1025 #endif
1026
1027 #if defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL)
1028 void bpf_sk_reuseport_detach(struct sock *sk);
1029 int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map, void *key,
1030 void *value);
1031 int bpf_fd_reuseport_array_update_elem(struct bpf_map *map, void *key,
1032 void *value, u64 map_flags);
1033 #else
bpf_sk_reuseport_detach(struct sock * sk)1034 static inline void bpf_sk_reuseport_detach(struct sock *sk)
1035 {
1036 }
1037
1038 #ifdef CONFIG_BPF_SYSCALL
bpf_fd_reuseport_array_lookup_elem(struct bpf_map * map,void * key,void * value)1039 static inline int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map,
1040 void *key, void *value)
1041 {
1042 return -EOPNOTSUPP;
1043 }
1044
bpf_fd_reuseport_array_update_elem(struct bpf_map * map,void * key,void * value,u64 map_flags)1045 static inline int bpf_fd_reuseport_array_update_elem(struct bpf_map *map,
1046 void *key, void *value,
1047 u64 map_flags)
1048 {
1049 return -EOPNOTSUPP;
1050 }
1051 #endif /* CONFIG_BPF_SYSCALL */
1052 #endif /* defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL) */
1053
1054 /* verifier prototypes for helper functions called from eBPF programs */
1055 extern const struct bpf_func_proto bpf_map_lookup_elem_proto;
1056 extern const struct bpf_func_proto bpf_map_update_elem_proto;
1057 extern const struct bpf_func_proto bpf_map_delete_elem_proto;
1058 extern const struct bpf_func_proto bpf_map_push_elem_proto;
1059 extern const struct bpf_func_proto bpf_map_pop_elem_proto;
1060 extern const struct bpf_func_proto bpf_map_peek_elem_proto;
1061
1062 extern const struct bpf_func_proto bpf_get_prandom_u32_proto;
1063 extern const struct bpf_func_proto bpf_get_smp_processor_id_proto;
1064 extern const struct bpf_func_proto bpf_get_numa_node_id_proto;
1065 extern const struct bpf_func_proto bpf_tail_call_proto;
1066 extern const struct bpf_func_proto bpf_ktime_get_ns_proto;
1067 extern const struct bpf_func_proto bpf_ktime_get_boot_ns_proto;
1068 extern const struct bpf_func_proto bpf_get_current_pid_tgid_proto;
1069 extern const struct bpf_func_proto bpf_get_current_uid_gid_proto;
1070 extern const struct bpf_func_proto bpf_get_current_comm_proto;
1071 extern const struct bpf_func_proto bpf_get_stackid_proto;
1072 extern const struct bpf_func_proto bpf_get_stack_proto;
1073 extern const struct bpf_func_proto bpf_sock_map_update_proto;
1074 extern const struct bpf_func_proto bpf_sock_hash_update_proto;
1075 extern const struct bpf_func_proto bpf_get_current_cgroup_id_proto;
1076 extern const struct bpf_func_proto bpf_msg_redirect_hash_proto;
1077 extern const struct bpf_func_proto bpf_msg_redirect_map_proto;
1078 extern const struct bpf_func_proto bpf_sk_redirect_hash_proto;
1079 extern const struct bpf_func_proto bpf_sk_redirect_map_proto;
1080 extern const struct bpf_func_proto bpf_spin_lock_proto;
1081 extern const struct bpf_func_proto bpf_spin_unlock_proto;
1082 extern const struct bpf_func_proto bpf_get_local_storage_proto;
1083 extern const struct bpf_func_proto bpf_strtol_proto;
1084 extern const struct bpf_func_proto bpf_strtoul_proto;
1085 extern const struct bpf_func_proto bpf_tcp_sock_proto;
1086
1087 /* Shared helpers among cBPF and eBPF. */
1088 void bpf_user_rnd_init_once(void);
1089 u64 bpf_user_rnd_u32(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
1090
1091 #if defined(CONFIG_NET)
1092 bool bpf_sock_common_is_valid_access(int off, int size,
1093 enum bpf_access_type type,
1094 struct bpf_insn_access_aux *info);
1095 bool bpf_sock_is_valid_access(int off, int size, enum bpf_access_type type,
1096 struct bpf_insn_access_aux *info);
1097 u32 bpf_sock_convert_ctx_access(enum bpf_access_type type,
1098 const struct bpf_insn *si,
1099 struct bpf_insn *insn_buf,
1100 struct bpf_prog *prog,
1101 u32 *target_size);
1102 #else
bpf_sock_common_is_valid_access(int off,int size,enum bpf_access_type type,struct bpf_insn_access_aux * info)1103 static inline bool bpf_sock_common_is_valid_access(int off, int size,
1104 enum bpf_access_type type,
1105 struct bpf_insn_access_aux *info)
1106 {
1107 return false;
1108 }
bpf_sock_is_valid_access(int off,int size,enum bpf_access_type type,struct bpf_insn_access_aux * info)1109 static inline bool bpf_sock_is_valid_access(int off, int size,
1110 enum bpf_access_type type,
1111 struct bpf_insn_access_aux *info)
1112 {
1113 return false;
1114 }
bpf_sock_convert_ctx_access(enum bpf_access_type type,const struct bpf_insn * si,struct bpf_insn * insn_buf,struct bpf_prog * prog,u32 * target_size)1115 static inline u32 bpf_sock_convert_ctx_access(enum bpf_access_type type,
1116 const struct bpf_insn *si,
1117 struct bpf_insn *insn_buf,
1118 struct bpf_prog *prog,
1119 u32 *target_size)
1120 {
1121 return 0;
1122 }
1123 #endif
1124
1125 #ifdef CONFIG_INET
1126 bool bpf_tcp_sock_is_valid_access(int off, int size, enum bpf_access_type type,
1127 struct bpf_insn_access_aux *info);
1128
1129 u32 bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type,
1130 const struct bpf_insn *si,
1131 struct bpf_insn *insn_buf,
1132 struct bpf_prog *prog,
1133 u32 *target_size);
1134
1135 bool bpf_xdp_sock_is_valid_access(int off, int size, enum bpf_access_type type,
1136 struct bpf_insn_access_aux *info);
1137
1138 u32 bpf_xdp_sock_convert_ctx_access(enum bpf_access_type type,
1139 const struct bpf_insn *si,
1140 struct bpf_insn *insn_buf,
1141 struct bpf_prog *prog,
1142 u32 *target_size);
1143 #else
bpf_tcp_sock_is_valid_access(int off,int size,enum bpf_access_type type,struct bpf_insn_access_aux * info)1144 static inline bool bpf_tcp_sock_is_valid_access(int off, int size,
1145 enum bpf_access_type type,
1146 struct bpf_insn_access_aux *info)
1147 {
1148 return false;
1149 }
1150
bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type,const struct bpf_insn * si,struct bpf_insn * insn_buf,struct bpf_prog * prog,u32 * target_size)1151 static inline u32 bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type,
1152 const struct bpf_insn *si,
1153 struct bpf_insn *insn_buf,
1154 struct bpf_prog *prog,
1155 u32 *target_size)
1156 {
1157 return 0;
1158 }
bpf_xdp_sock_is_valid_access(int off,int size,enum bpf_access_type type,struct bpf_insn_access_aux * info)1159 static inline bool bpf_xdp_sock_is_valid_access(int off, int size,
1160 enum bpf_access_type type,
1161 struct bpf_insn_access_aux *info)
1162 {
1163 return false;
1164 }
1165
bpf_xdp_sock_convert_ctx_access(enum bpf_access_type type,const struct bpf_insn * si,struct bpf_insn * insn_buf,struct bpf_prog * prog,u32 * target_size)1166 static inline u32 bpf_xdp_sock_convert_ctx_access(enum bpf_access_type type,
1167 const struct bpf_insn *si,
1168 struct bpf_insn *insn_buf,
1169 struct bpf_prog *prog,
1170 u32 *target_size)
1171 {
1172 return 0;
1173 }
1174 #endif /* CONFIG_INET */
1175
1176 #endif /* _LINUX_BPF_H */
1177