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);
37 void *(*map_lookup_elem_sys_only)(struct bpf_map *map, void *key);
39 /* funcs callable from userspace and from eBPF programs */
40 void *(*map_lookup_elem)(struct bpf_map *map, void *key);
41 int (*map_update_elem)(struct bpf_map *map, void *key, void *value, u64 flags);
42 int (*map_delete_elem)(struct bpf_map *map, void *key);
44 /* funcs called by prog_array and perf_event_array map */
45 void *(*map_fd_get_ptr)(struct bpf_map *map, struct file *map_file,
47 void (*map_fd_put_ptr)(void *ptr);
48 u32 (*map_gen_lookup)(struct bpf_map *map, struct bpf_insn *insn_buf);
49 u32 (*map_fd_sys_lookup_elem)(void *ptr);
50 void (*map_seq_show_elem)(struct bpf_map *map, void *key,
52 int (*map_check_btf)(const struct bpf_map *map,
53 const struct btf_type *key_type,
54 const struct btf_type *value_type);
58 /* The first two cachelines with read-mostly members of which some
59 * are also accessed in fast-path (e.g. ops, max_entries).
61 const struct bpf_map_ops *ops ____cacheline_aligned;
62 struct bpf_map *inner_map_meta;
63 #ifdef CONFIG_SECURITY
66 enum bpf_map_type map_type;
75 u32 btf_value_type_id;
80 /* The 3rd and 4th cacheline with misc members to avoid false sharing
81 * particularly with refcounting.
83 struct user_struct *user ____cacheline_aligned;
86 struct work_struct work;
87 char name[BPF_OBJ_NAME_LEN];
90 struct bpf_offload_dev;
91 struct bpf_offloaded_map;
93 struct bpf_map_dev_ops {
94 int (*map_get_next_key)(struct bpf_offloaded_map *map,
95 void *key, void *next_key);
96 int (*map_lookup_elem)(struct bpf_offloaded_map *map,
97 void *key, void *value);
98 int (*map_update_elem)(struct bpf_offloaded_map *map,
99 void *key, void *value, u64 flags);
100 int (*map_delete_elem)(struct bpf_offloaded_map *map, void *key);
103 struct bpf_offloaded_map {
105 struct net_device *netdev;
106 const struct bpf_map_dev_ops *dev_ops;
108 struct list_head offloads;
111 static inline struct bpf_offloaded_map *map_to_offmap(struct bpf_map *map)
113 return container_of(map, struct bpf_offloaded_map, map);
116 static inline bool bpf_map_offload_neutral(const struct bpf_map *map)
118 return map->map_type == BPF_MAP_TYPE_PERF_EVENT_ARRAY;
121 static inline bool bpf_map_support_seq_show(const struct bpf_map *map)
123 return map->btf && map->ops->map_seq_show_elem;
126 int map_check_no_btf(const struct bpf_map *map,
127 const struct btf_type *key_type,
128 const struct btf_type *value_type);
130 extern const struct bpf_map_ops bpf_map_offload_ops;
132 /* function argument constraints */
134 ARG_DONTCARE = 0, /* unused argument in helper function */
136 /* the following constraints used to prototype
137 * bpf_map_lookup/update/delete_elem() functions
139 ARG_CONST_MAP_PTR, /* const argument used as pointer to bpf_map */
140 ARG_PTR_TO_MAP_KEY, /* pointer to stack used as map key */
141 ARG_PTR_TO_MAP_VALUE, /* pointer to stack used as map value */
143 /* the following constraints used to prototype bpf_memcmp() and other
144 * functions that access data on eBPF program stack
146 ARG_PTR_TO_MEM, /* pointer to valid memory (stack, packet, map value) */
147 ARG_PTR_TO_MEM_OR_NULL, /* pointer to valid memory or NULL */
148 ARG_PTR_TO_UNINIT_MEM, /* pointer to memory does not need to be initialized,
149 * helper function must fill all bytes or clear
150 * them in error case.
153 ARG_CONST_SIZE, /* number of bytes accessed from memory */
154 ARG_CONST_SIZE_OR_ZERO, /* number of bytes accessed from memory or 0 */
156 ARG_PTR_TO_CTX, /* pointer to context */
157 ARG_ANYTHING, /* any (initialized) argument is ok */
160 /* type of values returned from helper functions */
161 enum bpf_return_type {
162 RET_INTEGER, /* function returns integer */
163 RET_VOID, /* function doesn't return anything */
164 RET_PTR_TO_MAP_VALUE, /* returns a pointer to map elem value */
165 RET_PTR_TO_MAP_VALUE_OR_NULL, /* returns a pointer to map elem value or NULL */
168 /* eBPF function prototype used by verifier to allow BPF_CALLs from eBPF programs
169 * to in-kernel helper functions and for adjusting imm32 field in BPF_CALL
170 * instructions after verifying
172 struct bpf_func_proto {
173 u64 (*func)(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
176 enum bpf_return_type ret_type;
177 enum bpf_arg_type arg1_type;
178 enum bpf_arg_type arg2_type;
179 enum bpf_arg_type arg3_type;
180 enum bpf_arg_type arg4_type;
181 enum bpf_arg_type arg5_type;
184 /* bpf_context is intentionally undefined structure. Pointer to bpf_context is
185 * the first argument to eBPF programs.
186 * For socket filters: 'struct bpf_context *' == 'struct sk_buff *'
190 enum bpf_access_type {
195 /* types of values stored in eBPF registers */
196 /* Pointer types represent:
199 * pointer + (u16) var
200 * pointer + (u16) var + imm
201 * if (range > 0) then [ptr, ptr + range - off) is safe to access
202 * if (id > 0) means that some 'var' was added
203 * if (off > 0) means that 'imm' was added
206 NOT_INIT = 0, /* nothing was written into register */
207 SCALAR_VALUE, /* reg doesn't contain a valid pointer */
208 PTR_TO_CTX, /* reg points to bpf_context */
209 CONST_PTR_TO_MAP, /* reg points to struct bpf_map */
210 PTR_TO_MAP_VALUE, /* reg points to map element value */
211 PTR_TO_MAP_VALUE_OR_NULL,/* points to map elem value or NULL */
212 PTR_TO_STACK, /* reg == frame_pointer + offset */
213 PTR_TO_PACKET_META, /* skb->data - meta_len */
214 PTR_TO_PACKET, /* reg points to skb->data */
215 PTR_TO_PACKET_END, /* skb->data + headlen */
218 /* The information passed from prog-specific *_is_valid_access
219 * back to the verifier.
221 struct bpf_insn_access_aux {
222 enum bpf_reg_type reg_type;
227 bpf_ctx_record_field_size(struct bpf_insn_access_aux *aux, u32 size)
229 aux->ctx_field_size = size;
232 struct bpf_prog_ops {
233 int (*test_run)(struct bpf_prog *prog, const union bpf_attr *kattr,
234 union bpf_attr __user *uattr);
237 struct bpf_verifier_ops {
238 /* return eBPF function prototype for verification */
239 const struct bpf_func_proto *
240 (*get_func_proto)(enum bpf_func_id func_id,
241 const struct bpf_prog *prog);
243 /* return true if 'size' wide access at offset 'off' within bpf_context
244 * with 'type' (read or write) is allowed
246 bool (*is_valid_access)(int off, int size, enum bpf_access_type type,
247 const struct bpf_prog *prog,
248 struct bpf_insn_access_aux *info);
249 int (*gen_prologue)(struct bpf_insn *insn, bool direct_write,
250 const struct bpf_prog *prog);
251 int (*gen_ld_abs)(const struct bpf_insn *orig,
252 struct bpf_insn *insn_buf);
253 u32 (*convert_ctx_access)(enum bpf_access_type type,
254 const struct bpf_insn *src,
255 struct bpf_insn *dst,
256 struct bpf_prog *prog, u32 *target_size);
259 struct bpf_prog_offload_ops {
260 int (*insn_hook)(struct bpf_verifier_env *env,
261 int insn_idx, int prev_insn_idx);
264 struct bpf_prog_offload {
265 struct bpf_prog *prog;
266 struct net_device *netdev;
268 struct list_head offloads;
270 const struct bpf_prog_offload_ops *dev_ops;
275 struct bpf_prog_aux {
282 bool offload_requested;
283 struct bpf_prog **func;
284 void *jit_data; /* JIT specific data. arch dependent */
285 struct latch_tree_node ksym_tnode;
286 struct list_head ksym_lnode;
287 const struct bpf_prog_ops *ops;
288 struct bpf_map **used_maps;
289 struct bpf_prog *prog;
290 struct user_struct *user;
291 u64 load_time; /* ns since boottime */
292 struct bpf_map *cgroup_storage;
293 char name[BPF_OBJ_NAME_LEN];
294 #ifdef CONFIG_SECURITY
297 struct bpf_prog_offload *offload;
299 struct work_struct work;
308 /* 'ownership' of prog_array is claimed by the first program that
309 * is going to use this map or by the first program which FD is stored
310 * in the map to make sure that all callers and callees have the same
311 * prog_type and JITed flag
313 enum bpf_prog_type owner_prog_type;
316 char value[0] __aligned(8);
317 void *ptrs[0] __aligned(8);
318 void __percpu *pptrs[0] __aligned(8);
322 #define MAX_TAIL_CALL_CNT 32
324 struct bpf_event_entry {
325 struct perf_event *event;
326 struct file *perf_file;
327 struct file *map_file;
331 bool bpf_prog_array_compatible(struct bpf_array *array, const struct bpf_prog *fp);
332 int bpf_prog_calc_tag(struct bpf_prog *fp);
334 const struct bpf_func_proto *bpf_get_trace_printk_proto(void);
336 typedef unsigned long (*bpf_ctx_copy_t)(void *dst, const void *src,
337 unsigned long off, unsigned long len);
339 u64 bpf_event_output(struct bpf_map *map, u64 flags, void *meta, u64 meta_size,
340 void *ctx, u64 ctx_size, bpf_ctx_copy_t ctx_copy);
342 int bpf_prog_test_run_xdp(struct bpf_prog *prog, const union bpf_attr *kattr,
343 union bpf_attr __user *uattr);
344 int bpf_prog_test_run_skb(struct bpf_prog *prog, const union bpf_attr *kattr,
345 union bpf_attr __user *uattr);
347 /* an array of programs to be executed under rcu_lock.
350 * ret = BPF_PROG_RUN_ARRAY(&bpf_prog_array, ctx, BPF_PROG_RUN);
352 * the structure returned by bpf_prog_array_alloc() should be populated
353 * with program pointers and the last pointer must be NULL.
354 * The user has to keep refcnt on the program and make sure the program
355 * is removed from the array before bpf_prog_put().
356 * The 'struct bpf_prog_array *' should only be replaced with xchg()
357 * since other cpus are walking the array of pointers in parallel.
359 struct bpf_prog_array_item {
360 struct bpf_prog *prog;
361 struct bpf_cgroup_storage *cgroup_storage;
364 struct bpf_prog_array {
366 struct bpf_prog_array_item items[0];
369 struct bpf_prog_array *bpf_prog_array_alloc(u32 prog_cnt, gfp_t flags);
370 void bpf_prog_array_free(struct bpf_prog_array __rcu *progs);
371 int bpf_prog_array_length(struct bpf_prog_array __rcu *progs);
372 int bpf_prog_array_copy_to_user(struct bpf_prog_array __rcu *progs,
373 __u32 __user *prog_ids, u32 cnt);
375 void bpf_prog_array_delete_safe(struct bpf_prog_array __rcu *progs,
376 struct bpf_prog *old_prog);
377 int bpf_prog_array_copy_info(struct bpf_prog_array __rcu *array,
378 u32 *prog_ids, u32 request_cnt,
380 int bpf_prog_array_copy(struct bpf_prog_array __rcu *old_array,
381 struct bpf_prog *exclude_prog,
382 struct bpf_prog *include_prog,
383 struct bpf_prog_array **new_array);
385 #define __BPF_PROG_RUN_ARRAY(array, ctx, func, check_non_null, set_cg_storage) \
387 struct bpf_prog_array_item *_item; \
388 struct bpf_prog *_prog; \
389 struct bpf_prog_array *_array; \
393 _array = rcu_dereference(array); \
394 if (unlikely(check_non_null && !_array))\
396 _item = &_array->items[0]; \
397 while ((_prog = READ_ONCE(_item->prog))) { \
398 if (set_cg_storage) \
399 bpf_cgroup_storage_set(_item->cgroup_storage); \
400 _ret &= func(_prog, ctx); \
409 #define BPF_PROG_RUN_ARRAY(array, ctx, func) \
410 __BPF_PROG_RUN_ARRAY(array, ctx, func, false, true)
412 #define BPF_PROG_RUN_ARRAY_CHECK(array, ctx, func) \
413 __BPF_PROG_RUN_ARRAY(array, ctx, func, true, false)
415 #ifdef CONFIG_BPF_SYSCALL
416 DECLARE_PER_CPU(int, bpf_prog_active);
418 extern const struct file_operations bpf_map_fops;
419 extern const struct file_operations bpf_prog_fops;
421 #define BPF_PROG_TYPE(_id, _name) \
422 extern const struct bpf_prog_ops _name ## _prog_ops; \
423 extern const struct bpf_verifier_ops _name ## _verifier_ops;
424 #define BPF_MAP_TYPE(_id, _ops) \
425 extern const struct bpf_map_ops _ops;
426 #include <linux/bpf_types.h>
430 extern const struct bpf_prog_ops bpf_offload_prog_ops;
431 extern const struct bpf_verifier_ops tc_cls_act_analyzer_ops;
432 extern const struct bpf_verifier_ops xdp_analyzer_ops;
434 struct bpf_prog *bpf_prog_get(u32 ufd);
435 struct bpf_prog *bpf_prog_get_type_dev(u32 ufd, enum bpf_prog_type type,
437 struct bpf_prog * __must_check bpf_prog_add(struct bpf_prog *prog, int i);
438 void bpf_prog_sub(struct bpf_prog *prog, int i);
439 struct bpf_prog * __must_check bpf_prog_inc(struct bpf_prog *prog);
440 struct bpf_prog * __must_check bpf_prog_inc_not_zero(struct bpf_prog *prog);
441 void bpf_prog_put(struct bpf_prog *prog);
442 int __bpf_prog_charge(struct user_struct *user, u32 pages);
443 void __bpf_prog_uncharge(struct user_struct *user, u32 pages);
445 void bpf_prog_free_id(struct bpf_prog *prog, bool do_idr_lock);
446 void bpf_map_free_id(struct bpf_map *map, bool do_idr_lock);
448 struct bpf_map *bpf_map_get_with_uref(u32 ufd);
449 struct bpf_map *__bpf_map_get(struct fd f);
450 struct bpf_map * __must_check bpf_map_inc(struct bpf_map *map, bool uref);
451 void bpf_map_put_with_uref(struct bpf_map *map);
452 void bpf_map_put(struct bpf_map *map);
453 int bpf_map_precharge_memlock(u32 pages);
454 int bpf_map_charge_memlock(struct bpf_map *map, u32 pages);
455 void bpf_map_uncharge_memlock(struct bpf_map *map, u32 pages);
456 void *bpf_map_area_alloc(size_t size, int numa_node);
457 void bpf_map_area_free(void *base);
458 void bpf_map_init_from_attr(struct bpf_map *map, union bpf_attr *attr);
460 extern int sysctl_unprivileged_bpf_disabled;
462 int bpf_map_new_fd(struct bpf_map *map, int flags);
463 int bpf_prog_new_fd(struct bpf_prog *prog);
465 int bpf_obj_pin_user(u32 ufd, const char __user *pathname);
466 int bpf_obj_get_user(const char __user *pathname, int flags);
468 int bpf_percpu_hash_copy(struct bpf_map *map, void *key, void *value);
469 int bpf_percpu_array_copy(struct bpf_map *map, void *key, void *value);
470 int bpf_percpu_hash_update(struct bpf_map *map, void *key, void *value,
472 int bpf_percpu_array_update(struct bpf_map *map, void *key, void *value,
475 int bpf_stackmap_copy(struct bpf_map *map, void *key, void *value);
477 int bpf_fd_array_map_update_elem(struct bpf_map *map, struct file *map_file,
478 void *key, void *value, u64 map_flags);
479 int bpf_fd_array_map_lookup_elem(struct bpf_map *map, void *key, u32 *value);
480 int bpf_fd_htab_map_update_elem(struct bpf_map *map, struct file *map_file,
481 void *key, void *value, u64 map_flags);
482 int bpf_fd_htab_map_lookup_elem(struct bpf_map *map, void *key, u32 *value);
484 int bpf_get_file_flag(int flags);
485 int bpf_check_uarg_tail_zero(void __user *uaddr, size_t expected_size,
488 /* memcpy that is used with 8-byte aligned pointers, power-of-8 size and
489 * forced to use 'long' read/writes to try to atomically copy long counters.
490 * Best-effort only. No barriers here, since it _will_ race with concurrent
491 * updates from BPF programs. Called from bpf syscall and mostly used with
492 * size 8 or 16 bytes, so ask compiler to inline it.
494 static inline void bpf_long_memcpy(void *dst, const void *src, u32 size)
496 const long *lsrc = src;
499 size /= sizeof(long);
504 /* verify correctness of eBPF program */
505 int bpf_check(struct bpf_prog **fp, union bpf_attr *attr);
506 void bpf_patch_call_args(struct bpf_insn *insn, u32 stack_depth);
512 struct bpf_dtab_netdev *__dev_map_lookup_elem(struct bpf_map *map, u32 key);
513 void __dev_map_insert_ctx(struct bpf_map *map, u32 index);
514 void __dev_map_flush(struct bpf_map *map);
515 int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp,
516 struct net_device *dev_rx);
517 int dev_map_generic_redirect(struct bpf_dtab_netdev *dst, struct sk_buff *skb,
518 struct bpf_prog *xdp_prog);
520 struct bpf_cpu_map_entry *__cpu_map_lookup_elem(struct bpf_map *map, u32 key);
521 void __cpu_map_insert_ctx(struct bpf_map *map, u32 index);
522 void __cpu_map_flush(struct bpf_map *map);
523 int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu, struct xdp_buff *xdp,
524 struct net_device *dev_rx);
526 /* Return map's numa specified by userspace */
527 static inline int bpf_map_attr_numa_node(const union bpf_attr *attr)
529 return (attr->map_flags & BPF_F_NUMA_NODE) ?
530 attr->numa_node : NUMA_NO_NODE;
533 struct bpf_prog *bpf_prog_get_type_path(const char *name, enum bpf_prog_type type);
534 int array_map_alloc_check(union bpf_attr *attr);
536 static inline bool unprivileged_ebpf_enabled(void)
538 return !sysctl_unprivileged_bpf_disabled;
541 #else /* !CONFIG_BPF_SYSCALL */
542 static inline struct bpf_prog *bpf_prog_get(u32 ufd)
544 return ERR_PTR(-EOPNOTSUPP);
547 static inline struct bpf_prog *bpf_prog_get_type_dev(u32 ufd,
548 enum bpf_prog_type type,
551 return ERR_PTR(-EOPNOTSUPP);
554 static inline struct bpf_prog * __must_check bpf_prog_add(struct bpf_prog *prog,
557 return ERR_PTR(-EOPNOTSUPP);
560 static inline void bpf_prog_sub(struct bpf_prog *prog, int i)
564 static inline void bpf_prog_put(struct bpf_prog *prog)
568 static inline struct bpf_prog * __must_check bpf_prog_inc(struct bpf_prog *prog)
570 return ERR_PTR(-EOPNOTSUPP);
573 static inline struct bpf_prog *__must_check
574 bpf_prog_inc_not_zero(struct bpf_prog *prog)
576 return ERR_PTR(-EOPNOTSUPP);
579 static inline int __bpf_prog_charge(struct user_struct *user, u32 pages)
584 static inline void __bpf_prog_uncharge(struct user_struct *user, u32 pages)
588 static inline int bpf_obj_get_user(const char __user *pathname, int flags)
593 static inline struct net_device *__dev_map_lookup_elem(struct bpf_map *map,
599 static inline void __dev_map_insert_ctx(struct bpf_map *map, u32 index)
603 static inline void __dev_map_flush(struct bpf_map *map)
608 struct bpf_dtab_netdev;
611 int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp,
612 struct net_device *dev_rx)
619 static inline int dev_map_generic_redirect(struct bpf_dtab_netdev *dst,
621 struct bpf_prog *xdp_prog)
627 struct bpf_cpu_map_entry *__cpu_map_lookup_elem(struct bpf_map *map, u32 key)
632 static inline void __cpu_map_insert_ctx(struct bpf_map *map, u32 index)
636 static inline void __cpu_map_flush(struct bpf_map *map)
640 static inline int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu,
641 struct xdp_buff *xdp,
642 struct net_device *dev_rx)
647 static inline struct bpf_prog *bpf_prog_get_type_path(const char *name,
648 enum bpf_prog_type type)
650 return ERR_PTR(-EOPNOTSUPP);
653 static inline bool unprivileged_ebpf_enabled(void)
658 #endif /* CONFIG_BPF_SYSCALL */
660 static inline struct bpf_prog *bpf_prog_get_type(u32 ufd,
661 enum bpf_prog_type type)
663 return bpf_prog_get_type_dev(ufd, type, false);
666 bool bpf_prog_get_ok(struct bpf_prog *, enum bpf_prog_type *, bool);
668 int bpf_prog_offload_compile(struct bpf_prog *prog);
669 void bpf_prog_offload_destroy(struct bpf_prog *prog);
670 int bpf_prog_offload_info_fill(struct bpf_prog_info *info,
671 struct bpf_prog *prog);
673 int bpf_map_offload_info_fill(struct bpf_map_info *info, struct bpf_map *map);
675 int bpf_map_offload_lookup_elem(struct bpf_map *map, void *key, void *value);
676 int bpf_map_offload_update_elem(struct bpf_map *map,
677 void *key, void *value, u64 flags);
678 int bpf_map_offload_delete_elem(struct bpf_map *map, void *key);
679 int bpf_map_offload_get_next_key(struct bpf_map *map,
680 void *key, void *next_key);
682 bool bpf_offload_prog_map_match(struct bpf_prog *prog, struct bpf_map *map);
684 struct bpf_offload_dev *bpf_offload_dev_create(void);
685 void bpf_offload_dev_destroy(struct bpf_offload_dev *offdev);
686 int bpf_offload_dev_netdev_register(struct bpf_offload_dev *offdev,
687 struct net_device *netdev);
688 void bpf_offload_dev_netdev_unregister(struct bpf_offload_dev *offdev,
689 struct net_device *netdev);
690 bool bpf_offload_dev_match(struct bpf_prog *prog, struct net_device *netdev);
692 #if defined(CONFIG_NET) && defined(CONFIG_BPF_SYSCALL)
693 int bpf_prog_offload_init(struct bpf_prog *prog, union bpf_attr *attr);
695 static inline bool bpf_prog_is_dev_bound(const struct bpf_prog_aux *aux)
697 return aux->offload_requested;
700 static inline bool bpf_map_is_dev_bound(struct bpf_map *map)
702 return unlikely(map->ops == &bpf_map_offload_ops);
705 struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr);
706 void bpf_map_offload_map_free(struct bpf_map *map);
708 static inline int bpf_prog_offload_init(struct bpf_prog *prog,
709 union bpf_attr *attr)
714 static inline bool bpf_prog_is_dev_bound(struct bpf_prog_aux *aux)
719 static inline bool bpf_map_is_dev_bound(struct bpf_map *map)
724 static inline struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr)
726 return ERR_PTR(-EOPNOTSUPP);
729 static inline void bpf_map_offload_map_free(struct bpf_map *map)
732 #endif /* CONFIG_NET && CONFIG_BPF_SYSCALL */
734 #if defined(CONFIG_STREAM_PARSER) && defined(CONFIG_BPF_SYSCALL) && defined(CONFIG_INET)
735 struct sock *__sock_map_lookup_elem(struct bpf_map *map, u32 key);
736 struct sock *__sock_hash_lookup_elem(struct bpf_map *map, void *key);
737 int sock_map_prog(struct bpf_map *map, struct bpf_prog *prog, u32 type);
738 int sockmap_get_from_fd(const union bpf_attr *attr, int type,
739 struct bpf_prog *prog);
741 static inline struct sock *__sock_map_lookup_elem(struct bpf_map *map, u32 key)
746 static inline struct sock *__sock_hash_lookup_elem(struct bpf_map *map,
752 static inline int sock_map_prog(struct bpf_map *map,
753 struct bpf_prog *prog,
759 static inline int sockmap_get_from_fd(const union bpf_attr *attr, int type,
760 struct bpf_prog *prog)
766 #if defined(CONFIG_XDP_SOCKETS)
768 struct xdp_sock *__xsk_map_lookup_elem(struct bpf_map *map, u32 key);
769 int __xsk_map_redirect(struct bpf_map *map, struct xdp_buff *xdp,
770 struct xdp_sock *xs);
771 void __xsk_map_flush(struct bpf_map *map);
774 static inline struct xdp_sock *__xsk_map_lookup_elem(struct bpf_map *map,
780 static inline int __xsk_map_redirect(struct bpf_map *map, struct xdp_buff *xdp,
786 static inline void __xsk_map_flush(struct bpf_map *map)
791 #if defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL)
792 void bpf_sk_reuseport_detach(struct sock *sk);
793 int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map, void *key,
795 int bpf_fd_reuseport_array_update_elem(struct bpf_map *map, void *key,
796 void *value, u64 map_flags);
798 static inline void bpf_sk_reuseport_detach(struct sock *sk)
802 #ifdef CONFIG_BPF_SYSCALL
803 static inline int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map,
804 void *key, void *value)
809 static inline int bpf_fd_reuseport_array_update_elem(struct bpf_map *map,
810 void *key, void *value,
815 #endif /* CONFIG_BPF_SYSCALL */
816 #endif /* defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL) */
818 /* verifier prototypes for helper functions called from eBPF programs */
819 extern const struct bpf_func_proto bpf_map_lookup_elem_proto;
820 extern const struct bpf_func_proto bpf_map_update_elem_proto;
821 extern const struct bpf_func_proto bpf_map_delete_elem_proto;
823 extern const struct bpf_func_proto bpf_get_prandom_u32_proto;
824 extern const struct bpf_func_proto bpf_get_smp_processor_id_proto;
825 extern const struct bpf_func_proto bpf_get_numa_node_id_proto;
826 extern const struct bpf_func_proto bpf_tail_call_proto;
827 extern const struct bpf_func_proto bpf_ktime_get_ns_proto;
828 extern const struct bpf_func_proto bpf_get_current_pid_tgid_proto;
829 extern const struct bpf_func_proto bpf_get_current_uid_gid_proto;
830 extern const struct bpf_func_proto bpf_get_current_comm_proto;
831 extern const struct bpf_func_proto bpf_get_stackid_proto;
832 extern const struct bpf_func_proto bpf_get_stack_proto;
833 extern const struct bpf_func_proto bpf_sock_map_update_proto;
834 extern const struct bpf_func_proto bpf_sock_hash_update_proto;
835 extern const struct bpf_func_proto bpf_get_current_cgroup_id_proto;
837 extern const struct bpf_func_proto bpf_get_local_storage_proto;
839 /* Shared helpers among cBPF and eBPF. */
840 void bpf_user_rnd_init_once(void);
841 u64 bpf_user_rnd_u32(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
843 #endif /* _LINUX_BPF_H */