1 /* Copyright (c) 2011-2014 PLUMgrid, http://plumgrid.com
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.
10 #include <uapi/linux/bpf.h>
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>
20 struct bpf_verifier_env;
28 /* map is generic key/value storage optionally accesible by eBPF programs */
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);
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);
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,
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,
51 int (*map_check_btf)(const struct bpf_map *map, const struct btf *btf,
52 u32 key_type_id, u32 value_type_id);
56 /* The first two cachelines with read-mostly members of which some
57 * are also accessed in fast-path (e.g. ops, max_entries).
59 const struct bpf_map_ops *ops ____cacheline_aligned;
60 struct bpf_map *inner_map_meta;
61 #ifdef CONFIG_SECURITY
64 enum bpf_map_type map_type;
73 u32 btf_value_type_id;
78 /* The 3rd and 4th cacheline with misc members to avoid false sharing
79 * particularly with refcounting.
81 struct user_struct *user ____cacheline_aligned;
84 struct work_struct work;
85 char name[BPF_OBJ_NAME_LEN];
88 struct bpf_offload_dev;
89 struct bpf_offloaded_map;
91 struct bpf_map_dev_ops {
92 int (*map_get_next_key)(struct bpf_offloaded_map *map,
93 void *key, void *next_key);
94 int (*map_lookup_elem)(struct bpf_offloaded_map *map,
95 void *key, void *value);
96 int (*map_update_elem)(struct bpf_offloaded_map *map,
97 void *key, void *value, u64 flags);
98 int (*map_delete_elem)(struct bpf_offloaded_map *map, void *key);
101 struct bpf_offloaded_map {
103 struct net_device *netdev;
104 const struct bpf_map_dev_ops *dev_ops;
106 struct list_head offloads;
109 static inline struct bpf_offloaded_map *map_to_offmap(struct bpf_map *map)
111 return container_of(map, struct bpf_offloaded_map, map);
114 static inline bool bpf_map_offload_neutral(const struct bpf_map *map)
116 return map->map_type == BPF_MAP_TYPE_PERF_EVENT_ARRAY;
119 static inline bool bpf_map_support_seq_show(const struct bpf_map *map)
121 return map->ops->map_seq_show_elem && map->ops->map_check_btf;
124 extern const struct bpf_map_ops bpf_map_offload_ops;
126 /* function argument constraints */
128 ARG_DONTCARE = 0, /* unused argument in helper function */
130 /* the following constraints used to prototype
131 * bpf_map_lookup/update/delete_elem() functions
133 ARG_CONST_MAP_PTR, /* const argument used as pointer to bpf_map */
134 ARG_PTR_TO_MAP_KEY, /* pointer to stack used as map key */
135 ARG_PTR_TO_MAP_VALUE, /* pointer to stack used as map value */
137 /* the following constraints used to prototype bpf_memcmp() and other
138 * functions that access data on eBPF program stack
140 ARG_PTR_TO_MEM, /* pointer to valid memory (stack, packet, map value) */
141 ARG_PTR_TO_MEM_OR_NULL, /* pointer to valid memory or NULL */
142 ARG_PTR_TO_UNINIT_MEM, /* pointer to memory does not need to be initialized,
143 * helper function must fill all bytes or clear
144 * them in error case.
147 ARG_CONST_SIZE, /* number of bytes accessed from memory */
148 ARG_CONST_SIZE_OR_ZERO, /* number of bytes accessed from memory or 0 */
150 ARG_PTR_TO_CTX, /* pointer to context */
151 ARG_ANYTHING, /* any (initialized) argument is ok */
154 /* type of values returned from helper functions */
155 enum bpf_return_type {
156 RET_INTEGER, /* function returns integer */
157 RET_VOID, /* function doesn't return anything */
158 RET_PTR_TO_MAP_VALUE, /* returns a pointer to map elem value */
159 RET_PTR_TO_MAP_VALUE_OR_NULL, /* returns a pointer to map elem value or NULL */
162 /* eBPF function prototype used by verifier to allow BPF_CALLs from eBPF programs
163 * to in-kernel helper functions and for adjusting imm32 field in BPF_CALL
164 * instructions after verifying
166 struct bpf_func_proto {
167 u64 (*func)(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
170 enum bpf_return_type ret_type;
171 enum bpf_arg_type arg1_type;
172 enum bpf_arg_type arg2_type;
173 enum bpf_arg_type arg3_type;
174 enum bpf_arg_type arg4_type;
175 enum bpf_arg_type arg5_type;
178 /* bpf_context is intentionally undefined structure. Pointer to bpf_context is
179 * the first argument to eBPF programs.
180 * For socket filters: 'struct bpf_context *' == 'struct sk_buff *'
184 enum bpf_access_type {
189 /* types of values stored in eBPF registers */
190 /* Pointer types represent:
193 * pointer + (u16) var
194 * pointer + (u16) var + imm
195 * if (range > 0) then [ptr, ptr + range - off) is safe to access
196 * if (id > 0) means that some 'var' was added
197 * if (off > 0) means that 'imm' was added
200 NOT_INIT = 0, /* nothing was written into register */
201 SCALAR_VALUE, /* reg doesn't contain a valid pointer */
202 PTR_TO_CTX, /* reg points to bpf_context */
203 CONST_PTR_TO_MAP, /* reg points to struct bpf_map */
204 PTR_TO_MAP_VALUE, /* reg points to map element value */
205 PTR_TO_MAP_VALUE_OR_NULL,/* points to map elem value or NULL */
206 PTR_TO_STACK, /* reg == frame_pointer + offset */
207 PTR_TO_PACKET_META, /* skb->data - meta_len */
208 PTR_TO_PACKET, /* reg points to skb->data */
209 PTR_TO_PACKET_END, /* skb->data + headlen */
212 /* The information passed from prog-specific *_is_valid_access
213 * back to the verifier.
215 struct bpf_insn_access_aux {
216 enum bpf_reg_type reg_type;
221 bpf_ctx_record_field_size(struct bpf_insn_access_aux *aux, u32 size)
223 aux->ctx_field_size = size;
226 struct bpf_prog_ops {
227 int (*test_run)(struct bpf_prog *prog, const union bpf_attr *kattr,
228 union bpf_attr __user *uattr);
231 struct bpf_verifier_ops {
232 /* return eBPF function prototype for verification */
233 const struct bpf_func_proto *
234 (*get_func_proto)(enum bpf_func_id func_id,
235 const struct bpf_prog *prog);
237 /* return true if 'size' wide access at offset 'off' within bpf_context
238 * with 'type' (read or write) is allowed
240 bool (*is_valid_access)(int off, int size, enum bpf_access_type type,
241 const struct bpf_prog *prog,
242 struct bpf_insn_access_aux *info);
243 int (*gen_prologue)(struct bpf_insn *insn, bool direct_write,
244 const struct bpf_prog *prog);
245 int (*gen_ld_abs)(const struct bpf_insn *orig,
246 struct bpf_insn *insn_buf);
247 u32 (*convert_ctx_access)(enum bpf_access_type type,
248 const struct bpf_insn *src,
249 struct bpf_insn *dst,
250 struct bpf_prog *prog, u32 *target_size);
253 struct bpf_prog_offload_ops {
254 int (*insn_hook)(struct bpf_verifier_env *env,
255 int insn_idx, int prev_insn_idx);
258 struct bpf_prog_offload {
259 struct bpf_prog *prog;
260 struct net_device *netdev;
262 struct list_head offloads;
264 const struct bpf_prog_offload_ops *dev_ops;
269 struct bpf_prog_aux {
276 bool offload_requested;
277 struct bpf_prog **func;
278 void *jit_data; /* JIT specific data. arch dependent */
279 struct latch_tree_node ksym_tnode;
280 struct list_head ksym_lnode;
281 const struct bpf_prog_ops *ops;
282 struct bpf_map **used_maps;
283 struct bpf_prog *prog;
284 struct user_struct *user;
285 u64 load_time; /* ns since boottime */
286 struct bpf_map *cgroup_storage;
287 char name[BPF_OBJ_NAME_LEN];
288 #ifdef CONFIG_SECURITY
291 struct bpf_prog_offload *offload;
293 struct work_struct work;
302 /* 'ownership' of prog_array is claimed by the first program that
303 * is going to use this map or by the first program which FD is stored
304 * in the map to make sure that all callers and callees have the same
305 * prog_type and JITed flag
307 enum bpf_prog_type owner_prog_type;
310 char value[0] __aligned(8);
311 void *ptrs[0] __aligned(8);
312 void __percpu *pptrs[0] __aligned(8);
316 #define MAX_TAIL_CALL_CNT 32
318 struct bpf_event_entry {
319 struct perf_event *event;
320 struct file *perf_file;
321 struct file *map_file;
325 bool bpf_prog_array_compatible(struct bpf_array *array, const struct bpf_prog *fp);
326 int bpf_prog_calc_tag(struct bpf_prog *fp);
328 const struct bpf_func_proto *bpf_get_trace_printk_proto(void);
330 typedef unsigned long (*bpf_ctx_copy_t)(void *dst, const void *src,
331 unsigned long off, unsigned long len);
333 u64 bpf_event_output(struct bpf_map *map, u64 flags, void *meta, u64 meta_size,
334 void *ctx, u64 ctx_size, bpf_ctx_copy_t ctx_copy);
336 int bpf_prog_test_run_xdp(struct bpf_prog *prog, const union bpf_attr *kattr,
337 union bpf_attr __user *uattr);
338 int bpf_prog_test_run_skb(struct bpf_prog *prog, const union bpf_attr *kattr,
339 union bpf_attr __user *uattr);
341 /* an array of programs to be executed under rcu_lock.
344 * ret = BPF_PROG_RUN_ARRAY(&bpf_prog_array, ctx, BPF_PROG_RUN);
346 * the structure returned by bpf_prog_array_alloc() should be populated
347 * with program pointers and the last pointer must be NULL.
348 * The user has to keep refcnt on the program and make sure the program
349 * is removed from the array before bpf_prog_put().
350 * The 'struct bpf_prog_array *' should only be replaced with xchg()
351 * since other cpus are walking the array of pointers in parallel.
353 struct bpf_prog_array_item {
354 struct bpf_prog *prog;
355 struct bpf_cgroup_storage *cgroup_storage;
358 struct bpf_prog_array {
360 struct bpf_prog_array_item items[0];
363 struct bpf_prog_array *bpf_prog_array_alloc(u32 prog_cnt, gfp_t flags);
364 void bpf_prog_array_free(struct bpf_prog_array __rcu *progs);
365 int bpf_prog_array_length(struct bpf_prog_array __rcu *progs);
366 int bpf_prog_array_copy_to_user(struct bpf_prog_array __rcu *progs,
367 __u32 __user *prog_ids, u32 cnt);
369 void bpf_prog_array_delete_safe(struct bpf_prog_array __rcu *progs,
370 struct bpf_prog *old_prog);
371 int bpf_prog_array_copy_info(struct bpf_prog_array __rcu *array,
372 u32 *prog_ids, u32 request_cnt,
374 int bpf_prog_array_copy(struct bpf_prog_array __rcu *old_array,
375 struct bpf_prog *exclude_prog,
376 struct bpf_prog *include_prog,
377 struct bpf_prog_array **new_array);
379 #define __BPF_PROG_RUN_ARRAY(array, ctx, func, check_non_null) \
381 struct bpf_prog_array_item *_item; \
382 struct bpf_prog *_prog; \
383 struct bpf_prog_array *_array; \
387 _array = rcu_dereference(array); \
388 if (unlikely(check_non_null && !_array))\
390 _item = &_array->items[0]; \
391 while ((_prog = READ_ONCE(_item->prog))) { \
392 bpf_cgroup_storage_set(_item->cgroup_storage); \
393 _ret &= func(_prog, ctx); \
398 preempt_enable_no_resched(); \
402 #define BPF_PROG_RUN_ARRAY(array, ctx, func) \
403 __BPF_PROG_RUN_ARRAY(array, ctx, func, false)
405 #define BPF_PROG_RUN_ARRAY_CHECK(array, ctx, func) \
406 __BPF_PROG_RUN_ARRAY(array, ctx, func, true)
408 #ifdef CONFIG_BPF_SYSCALL
409 DECLARE_PER_CPU(int, bpf_prog_active);
411 extern const struct file_operations bpf_map_fops;
412 extern const struct file_operations bpf_prog_fops;
414 #define BPF_PROG_TYPE(_id, _name) \
415 extern const struct bpf_prog_ops _name ## _prog_ops; \
416 extern const struct bpf_verifier_ops _name ## _verifier_ops;
417 #define BPF_MAP_TYPE(_id, _ops) \
418 extern const struct bpf_map_ops _ops;
419 #include <linux/bpf_types.h>
423 extern const struct bpf_prog_ops bpf_offload_prog_ops;
424 extern const struct bpf_verifier_ops tc_cls_act_analyzer_ops;
425 extern const struct bpf_verifier_ops xdp_analyzer_ops;
427 struct bpf_prog *bpf_prog_get(u32 ufd);
428 struct bpf_prog *bpf_prog_get_type_dev(u32 ufd, enum bpf_prog_type type,
430 struct bpf_prog * __must_check bpf_prog_add(struct bpf_prog *prog, int i);
431 void bpf_prog_sub(struct bpf_prog *prog, int i);
432 struct bpf_prog * __must_check bpf_prog_inc(struct bpf_prog *prog);
433 struct bpf_prog * __must_check bpf_prog_inc_not_zero(struct bpf_prog *prog);
434 void bpf_prog_put(struct bpf_prog *prog);
435 int __bpf_prog_charge(struct user_struct *user, u32 pages);
436 void __bpf_prog_uncharge(struct user_struct *user, u32 pages);
438 void bpf_prog_free_id(struct bpf_prog *prog, bool do_idr_lock);
439 void bpf_map_free_id(struct bpf_map *map, bool do_idr_lock);
441 struct bpf_map *bpf_map_get_with_uref(u32 ufd);
442 struct bpf_map *__bpf_map_get(struct fd f);
443 struct bpf_map * __must_check bpf_map_inc(struct bpf_map *map, bool uref);
444 void bpf_map_put_with_uref(struct bpf_map *map);
445 void bpf_map_put(struct bpf_map *map);
446 int bpf_map_precharge_memlock(u32 pages);
447 int bpf_map_charge_memlock(struct bpf_map *map, u32 pages);
448 void bpf_map_uncharge_memlock(struct bpf_map *map, u32 pages);
449 void *bpf_map_area_alloc(size_t size, int numa_node);
450 void bpf_map_area_free(void *base);
451 void bpf_map_init_from_attr(struct bpf_map *map, union bpf_attr *attr);
453 extern int sysctl_unprivileged_bpf_disabled;
455 int bpf_map_new_fd(struct bpf_map *map, int flags);
456 int bpf_prog_new_fd(struct bpf_prog *prog);
458 int bpf_obj_pin_user(u32 ufd, const char __user *pathname);
459 int bpf_obj_get_user(const char __user *pathname, int flags);
461 int bpf_percpu_hash_copy(struct bpf_map *map, void *key, void *value);
462 int bpf_percpu_array_copy(struct bpf_map *map, void *key, void *value);
463 int bpf_percpu_hash_update(struct bpf_map *map, void *key, void *value,
465 int bpf_percpu_array_update(struct bpf_map *map, void *key, void *value,
468 int bpf_stackmap_copy(struct bpf_map *map, void *key, void *value);
470 int bpf_fd_array_map_update_elem(struct bpf_map *map, struct file *map_file,
471 void *key, void *value, u64 map_flags);
472 int bpf_fd_array_map_lookup_elem(struct bpf_map *map, void *key, u32 *value);
473 int bpf_fd_htab_map_update_elem(struct bpf_map *map, struct file *map_file,
474 void *key, void *value, u64 map_flags);
475 int bpf_fd_htab_map_lookup_elem(struct bpf_map *map, void *key, u32 *value);
477 int bpf_get_file_flag(int flags);
478 int bpf_check_uarg_tail_zero(void __user *uaddr, size_t expected_size,
481 /* memcpy that is used with 8-byte aligned pointers, power-of-8 size and
482 * forced to use 'long' read/writes to try to atomically copy long counters.
483 * Best-effort only. No barriers here, since it _will_ race with concurrent
484 * updates from BPF programs. Called from bpf syscall and mostly used with
485 * size 8 or 16 bytes, so ask compiler to inline it.
487 static inline void bpf_long_memcpy(void *dst, const void *src, u32 size)
489 const long *lsrc = src;
492 size /= sizeof(long);
497 /* verify correctness of eBPF program */
498 int bpf_check(struct bpf_prog **fp, union bpf_attr *attr);
499 void bpf_patch_call_args(struct bpf_insn *insn, u32 stack_depth);
505 struct bpf_dtab_netdev *__dev_map_lookup_elem(struct bpf_map *map, u32 key);
506 void __dev_map_insert_ctx(struct bpf_map *map, u32 index);
507 void __dev_map_flush(struct bpf_map *map);
508 int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp,
509 struct net_device *dev_rx);
510 int dev_map_generic_redirect(struct bpf_dtab_netdev *dst, struct sk_buff *skb,
511 struct bpf_prog *xdp_prog);
513 struct bpf_cpu_map_entry *__cpu_map_lookup_elem(struct bpf_map *map, u32 key);
514 void __cpu_map_insert_ctx(struct bpf_map *map, u32 index);
515 void __cpu_map_flush(struct bpf_map *map);
516 int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu, struct xdp_buff *xdp,
517 struct net_device *dev_rx);
519 /* Return map's numa specified by userspace */
520 static inline int bpf_map_attr_numa_node(const union bpf_attr *attr)
522 return (attr->map_flags & BPF_F_NUMA_NODE) ?
523 attr->numa_node : NUMA_NO_NODE;
526 struct bpf_prog *bpf_prog_get_type_path(const char *name, enum bpf_prog_type type);
528 #else /* !CONFIG_BPF_SYSCALL */
529 static inline struct bpf_prog *bpf_prog_get(u32 ufd)
531 return ERR_PTR(-EOPNOTSUPP);
534 static inline struct bpf_prog *bpf_prog_get_type_dev(u32 ufd,
535 enum bpf_prog_type type,
538 return ERR_PTR(-EOPNOTSUPP);
541 static inline struct bpf_prog * __must_check bpf_prog_add(struct bpf_prog *prog,
544 return ERR_PTR(-EOPNOTSUPP);
547 static inline void bpf_prog_sub(struct bpf_prog *prog, int i)
551 static inline void bpf_prog_put(struct bpf_prog *prog)
555 static inline struct bpf_prog * __must_check bpf_prog_inc(struct bpf_prog *prog)
557 return ERR_PTR(-EOPNOTSUPP);
560 static inline struct bpf_prog *__must_check
561 bpf_prog_inc_not_zero(struct bpf_prog *prog)
563 return ERR_PTR(-EOPNOTSUPP);
566 static inline int __bpf_prog_charge(struct user_struct *user, u32 pages)
571 static inline void __bpf_prog_uncharge(struct user_struct *user, u32 pages)
575 static inline int bpf_obj_get_user(const char __user *pathname, int flags)
580 static inline struct net_device *__dev_map_lookup_elem(struct bpf_map *map,
586 static inline void __dev_map_insert_ctx(struct bpf_map *map, u32 index)
590 static inline void __dev_map_flush(struct bpf_map *map)
595 struct bpf_dtab_netdev;
598 int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp,
599 struct net_device *dev_rx)
606 static inline int dev_map_generic_redirect(struct bpf_dtab_netdev *dst,
608 struct bpf_prog *xdp_prog)
614 struct bpf_cpu_map_entry *__cpu_map_lookup_elem(struct bpf_map *map, u32 key)
619 static inline void __cpu_map_insert_ctx(struct bpf_map *map, u32 index)
623 static inline void __cpu_map_flush(struct bpf_map *map)
627 static inline int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu,
628 struct xdp_buff *xdp,
629 struct net_device *dev_rx)
634 static inline struct bpf_prog *bpf_prog_get_type_path(const char *name,
635 enum bpf_prog_type type)
637 return ERR_PTR(-EOPNOTSUPP);
639 #endif /* CONFIG_BPF_SYSCALL */
641 static inline struct bpf_prog *bpf_prog_get_type(u32 ufd,
642 enum bpf_prog_type type)
644 return bpf_prog_get_type_dev(ufd, type, false);
647 bool bpf_prog_get_ok(struct bpf_prog *, enum bpf_prog_type *, bool);
649 int bpf_prog_offload_compile(struct bpf_prog *prog);
650 void bpf_prog_offload_destroy(struct bpf_prog *prog);
651 int bpf_prog_offload_info_fill(struct bpf_prog_info *info,
652 struct bpf_prog *prog);
654 int bpf_map_offload_info_fill(struct bpf_map_info *info, struct bpf_map *map);
656 int bpf_map_offload_lookup_elem(struct bpf_map *map, void *key, void *value);
657 int bpf_map_offload_update_elem(struct bpf_map *map,
658 void *key, void *value, u64 flags);
659 int bpf_map_offload_delete_elem(struct bpf_map *map, void *key);
660 int bpf_map_offload_get_next_key(struct bpf_map *map,
661 void *key, void *next_key);
663 bool bpf_offload_prog_map_match(struct bpf_prog *prog, struct bpf_map *map);
665 struct bpf_offload_dev *bpf_offload_dev_create(void);
666 void bpf_offload_dev_destroy(struct bpf_offload_dev *offdev);
667 int bpf_offload_dev_netdev_register(struct bpf_offload_dev *offdev,
668 struct net_device *netdev);
669 void bpf_offload_dev_netdev_unregister(struct bpf_offload_dev *offdev,
670 struct net_device *netdev);
671 bool bpf_offload_dev_match(struct bpf_prog *prog, struct net_device *netdev);
673 #if defined(CONFIG_NET) && defined(CONFIG_BPF_SYSCALL)
674 int bpf_prog_offload_init(struct bpf_prog *prog, union bpf_attr *attr);
676 static inline bool bpf_prog_is_dev_bound(const struct bpf_prog_aux *aux)
678 return aux->offload_requested;
681 static inline bool bpf_map_is_dev_bound(struct bpf_map *map)
683 return unlikely(map->ops == &bpf_map_offload_ops);
686 struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr);
687 void bpf_map_offload_map_free(struct bpf_map *map);
689 static inline int bpf_prog_offload_init(struct bpf_prog *prog,
690 union bpf_attr *attr)
695 static inline bool bpf_prog_is_dev_bound(struct bpf_prog_aux *aux)
700 static inline bool bpf_map_is_dev_bound(struct bpf_map *map)
705 static inline struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr)
707 return ERR_PTR(-EOPNOTSUPP);
710 static inline void bpf_map_offload_map_free(struct bpf_map *map)
713 #endif /* CONFIG_NET && CONFIG_BPF_SYSCALL */
715 #if defined(CONFIG_STREAM_PARSER) && defined(CONFIG_BPF_SYSCALL) && defined(CONFIG_INET)
716 struct sock *__sock_map_lookup_elem(struct bpf_map *map, u32 key);
717 struct sock *__sock_hash_lookup_elem(struct bpf_map *map, void *key);
718 int sock_map_prog(struct bpf_map *map, struct bpf_prog *prog, u32 type);
719 int sockmap_get_from_fd(const union bpf_attr *attr, int type,
720 struct bpf_prog *prog);
722 static inline struct sock *__sock_map_lookup_elem(struct bpf_map *map, u32 key)
727 static inline struct sock *__sock_hash_lookup_elem(struct bpf_map *map,
733 static inline int sock_map_prog(struct bpf_map *map,
734 struct bpf_prog *prog,
740 static inline int sockmap_get_from_fd(const union bpf_attr *attr, int type,
741 struct bpf_prog *prog)
747 #if defined(CONFIG_XDP_SOCKETS)
749 struct xdp_sock *__xsk_map_lookup_elem(struct bpf_map *map, u32 key);
750 int __xsk_map_redirect(struct bpf_map *map, struct xdp_buff *xdp,
751 struct xdp_sock *xs);
752 void __xsk_map_flush(struct bpf_map *map);
755 static inline struct xdp_sock *__xsk_map_lookup_elem(struct bpf_map *map,
761 static inline int __xsk_map_redirect(struct bpf_map *map, struct xdp_buff *xdp,
767 static inline void __xsk_map_flush(struct bpf_map *map)
772 /* verifier prototypes for helper functions called from eBPF programs */
773 extern const struct bpf_func_proto bpf_map_lookup_elem_proto;
774 extern const struct bpf_func_proto bpf_map_update_elem_proto;
775 extern const struct bpf_func_proto bpf_map_delete_elem_proto;
777 extern const struct bpf_func_proto bpf_get_prandom_u32_proto;
778 extern const struct bpf_func_proto bpf_get_smp_processor_id_proto;
779 extern const struct bpf_func_proto bpf_get_numa_node_id_proto;
780 extern const struct bpf_func_proto bpf_tail_call_proto;
781 extern const struct bpf_func_proto bpf_ktime_get_ns_proto;
782 extern const struct bpf_func_proto bpf_get_current_pid_tgid_proto;
783 extern const struct bpf_func_proto bpf_get_current_uid_gid_proto;
784 extern const struct bpf_func_proto bpf_get_current_comm_proto;
785 extern const struct bpf_func_proto bpf_get_stackid_proto;
786 extern const struct bpf_func_proto bpf_get_stack_proto;
787 extern const struct bpf_func_proto bpf_sock_map_update_proto;
788 extern const struct bpf_func_proto bpf_sock_hash_update_proto;
789 extern const struct bpf_func_proto bpf_get_current_cgroup_id_proto;
791 extern const struct bpf_func_proto bpf_get_local_storage_proto;
793 /* Shared helpers among cBPF and eBPF. */
794 void bpf_user_rnd_init_once(void);
795 u64 bpf_user_rnd_u32(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
797 #endif /* _LINUX_BPF_H */