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);
42 int (*map_push_elem)(struct bpf_map *map, void *value, u64 flags);
43 int (*map_pop_elem)(struct bpf_map *map, void *value);
44 int (*map_peek_elem)(struct bpf_map *map, void *value);
46 /* funcs called by prog_array and perf_event_array map */
47 void *(*map_fd_get_ptr)(struct bpf_map *map, struct file *map_file,
49 void (*map_fd_put_ptr)(void *ptr);
50 u32 (*map_gen_lookup)(struct bpf_map *map, struct bpf_insn *insn_buf);
51 u32 (*map_fd_sys_lookup_elem)(void *ptr);
52 void (*map_seq_show_elem)(struct bpf_map *map, void *key,
54 int (*map_check_btf)(const struct bpf_map *map,
55 const struct btf_type *key_type,
56 const struct btf_type *value_type);
60 /* The first two cachelines with read-mostly members of which some
61 * are also accessed in fast-path (e.g. ops, max_entries).
63 const struct bpf_map_ops *ops ____cacheline_aligned;
64 struct bpf_map *inner_map_meta;
65 #ifdef CONFIG_SECURITY
68 enum bpf_map_type map_type;
77 u32 btf_value_type_id;
82 /* The 3rd and 4th cacheline with misc members to avoid false sharing
83 * particularly with refcounting.
85 struct user_struct *user ____cacheline_aligned;
88 struct work_struct work;
89 char name[BPF_OBJ_NAME_LEN];
92 struct bpf_offload_dev;
93 struct bpf_offloaded_map;
95 struct bpf_map_dev_ops {
96 int (*map_get_next_key)(struct bpf_offloaded_map *map,
97 void *key, void *next_key);
98 int (*map_lookup_elem)(struct bpf_offloaded_map *map,
99 void *key, void *value);
100 int (*map_update_elem)(struct bpf_offloaded_map *map,
101 void *key, void *value, u64 flags);
102 int (*map_delete_elem)(struct bpf_offloaded_map *map, void *key);
105 struct bpf_offloaded_map {
107 struct net_device *netdev;
108 const struct bpf_map_dev_ops *dev_ops;
110 struct list_head offloads;
113 static inline struct bpf_offloaded_map *map_to_offmap(struct bpf_map *map)
115 return container_of(map, struct bpf_offloaded_map, map);
118 static inline bool bpf_map_offload_neutral(const struct bpf_map *map)
120 return map->map_type == BPF_MAP_TYPE_PERF_EVENT_ARRAY;
123 static inline bool bpf_map_support_seq_show(const struct bpf_map *map)
125 return map->btf && map->ops->map_seq_show_elem;
128 int map_check_no_btf(const struct bpf_map *map,
129 const struct btf_type *key_type,
130 const struct btf_type *value_type);
132 extern const struct bpf_map_ops bpf_map_offload_ops;
134 /* function argument constraints */
136 ARG_DONTCARE = 0, /* unused argument in helper function */
138 /* the following constraints used to prototype
139 * bpf_map_lookup/update/delete_elem() functions
141 ARG_CONST_MAP_PTR, /* const argument used as pointer to bpf_map */
142 ARG_PTR_TO_MAP_KEY, /* pointer to stack used as map key */
143 ARG_PTR_TO_MAP_VALUE, /* pointer to stack used as map value */
144 ARG_PTR_TO_UNINIT_MAP_VALUE, /* pointer to valid memory used to store a map value */
146 /* the following constraints used to prototype bpf_memcmp() and other
147 * functions that access data on eBPF program stack
149 ARG_PTR_TO_MEM, /* pointer to valid memory (stack, packet, map value) */
150 ARG_PTR_TO_MEM_OR_NULL, /* pointer to valid memory or NULL */
151 ARG_PTR_TO_UNINIT_MEM, /* pointer to memory does not need to be initialized,
152 * helper function must fill all bytes or clear
153 * them in error case.
156 ARG_CONST_SIZE, /* number of bytes accessed from memory */
157 ARG_CONST_SIZE_OR_ZERO, /* number of bytes accessed from memory or 0 */
159 ARG_PTR_TO_CTX, /* pointer to context */
160 ARG_ANYTHING, /* any (initialized) argument is ok */
161 ARG_PTR_TO_SOCKET, /* pointer to bpf_sock */
164 /* type of values returned from helper functions */
165 enum bpf_return_type {
166 RET_INTEGER, /* function returns integer */
167 RET_VOID, /* function doesn't return anything */
168 RET_PTR_TO_MAP_VALUE, /* returns a pointer to map elem value */
169 RET_PTR_TO_MAP_VALUE_OR_NULL, /* returns a pointer to map elem value or NULL */
170 RET_PTR_TO_SOCKET_OR_NULL, /* returns a pointer to a socket or NULL */
173 /* eBPF function prototype used by verifier to allow BPF_CALLs from eBPF programs
174 * to in-kernel helper functions and for adjusting imm32 field in BPF_CALL
175 * instructions after verifying
177 struct bpf_func_proto {
178 u64 (*func)(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
181 enum bpf_return_type ret_type;
182 enum bpf_arg_type arg1_type;
183 enum bpf_arg_type arg2_type;
184 enum bpf_arg_type arg3_type;
185 enum bpf_arg_type arg4_type;
186 enum bpf_arg_type arg5_type;
189 /* bpf_context is intentionally undefined structure. Pointer to bpf_context is
190 * the first argument to eBPF programs.
191 * For socket filters: 'struct bpf_context *' == 'struct sk_buff *'
195 enum bpf_access_type {
200 /* types of values stored in eBPF registers */
201 /* Pointer types represent:
204 * pointer + (u16) var
205 * pointer + (u16) var + imm
206 * if (range > 0) then [ptr, ptr + range - off) is safe to access
207 * if (id > 0) means that some 'var' was added
208 * if (off > 0) means that 'imm' was added
211 NOT_INIT = 0, /* nothing was written into register */
212 SCALAR_VALUE, /* reg doesn't contain a valid pointer */
213 PTR_TO_CTX, /* reg points to bpf_context */
214 CONST_PTR_TO_MAP, /* reg points to struct bpf_map */
215 PTR_TO_MAP_VALUE, /* reg points to map element value */
216 PTR_TO_MAP_VALUE_OR_NULL,/* points to map elem value or NULL */
217 PTR_TO_STACK, /* reg == frame_pointer + offset */
218 PTR_TO_PACKET_META, /* skb->data - meta_len */
219 PTR_TO_PACKET, /* reg points to skb->data */
220 PTR_TO_PACKET_END, /* skb->data + headlen */
221 PTR_TO_FLOW_KEYS, /* reg points to bpf_flow_keys */
222 PTR_TO_SOCKET, /* reg points to struct bpf_sock */
223 PTR_TO_SOCKET_OR_NULL, /* reg points to struct bpf_sock or NULL */
226 /* The information passed from prog-specific *_is_valid_access
227 * back to the verifier.
229 struct bpf_insn_access_aux {
230 enum bpf_reg_type reg_type;
235 bpf_ctx_record_field_size(struct bpf_insn_access_aux *aux, u32 size)
237 aux->ctx_field_size = size;
240 struct bpf_prog_ops {
241 int (*test_run)(struct bpf_prog *prog, const union bpf_attr *kattr,
242 union bpf_attr __user *uattr);
245 struct bpf_verifier_ops {
246 /* return eBPF function prototype for verification */
247 const struct bpf_func_proto *
248 (*get_func_proto)(enum bpf_func_id func_id,
249 const struct bpf_prog *prog);
251 /* return true if 'size' wide access at offset 'off' within bpf_context
252 * with 'type' (read or write) is allowed
254 bool (*is_valid_access)(int off, int size, enum bpf_access_type type,
255 const struct bpf_prog *prog,
256 struct bpf_insn_access_aux *info);
257 int (*gen_prologue)(struct bpf_insn *insn, bool direct_write,
258 const struct bpf_prog *prog);
259 int (*gen_ld_abs)(const struct bpf_insn *orig,
260 struct bpf_insn *insn_buf);
261 u32 (*convert_ctx_access)(enum bpf_access_type type,
262 const struct bpf_insn *src,
263 struct bpf_insn *dst,
264 struct bpf_prog *prog, u32 *target_size);
267 struct bpf_prog_offload_ops {
268 int (*insn_hook)(struct bpf_verifier_env *env,
269 int insn_idx, int prev_insn_idx);
270 int (*finalize)(struct bpf_verifier_env *env);
273 struct bpf_prog_offload {
274 struct bpf_prog *prog;
275 struct net_device *netdev;
277 struct list_head offloads;
279 const struct bpf_prog_offload_ops *dev_ops;
284 enum bpf_cgroup_storage_type {
285 BPF_CGROUP_STORAGE_SHARED,
286 BPF_CGROUP_STORAGE_PERCPU,
287 __BPF_CGROUP_STORAGE_MAX
290 #define MAX_BPF_CGROUP_STORAGE_TYPE __BPF_CGROUP_STORAGE_MAX
292 struct bpf_prog_aux {
299 bool offload_requested;
300 struct bpf_prog **func;
301 void *jit_data; /* JIT specific data. arch dependent */
302 struct latch_tree_node ksym_tnode;
303 struct list_head ksym_lnode;
304 const struct bpf_prog_ops *ops;
305 struct bpf_map **used_maps;
306 struct bpf_prog *prog;
307 struct user_struct *user;
308 u64 load_time; /* ns since boottime */
309 struct bpf_map *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE];
310 char name[BPF_OBJ_NAME_LEN];
311 #ifdef CONFIG_SECURITY
314 struct bpf_prog_offload *offload;
316 struct work_struct work;
325 /* 'ownership' of prog_array is claimed by the first program that
326 * is going to use this map or by the first program which FD is stored
327 * in the map to make sure that all callers and callees have the same
328 * prog_type and JITed flag
330 enum bpf_prog_type owner_prog_type;
333 char value[0] __aligned(8);
334 void *ptrs[0] __aligned(8);
335 void __percpu *pptrs[0] __aligned(8);
339 #define MAX_TAIL_CALL_CNT 32
341 struct bpf_event_entry {
342 struct perf_event *event;
343 struct file *perf_file;
344 struct file *map_file;
348 bool bpf_prog_array_compatible(struct bpf_array *array, const struct bpf_prog *fp);
349 int bpf_prog_calc_tag(struct bpf_prog *fp);
351 const struct bpf_func_proto *bpf_get_trace_printk_proto(void);
353 typedef unsigned long (*bpf_ctx_copy_t)(void *dst, const void *src,
354 unsigned long off, unsigned long len);
355 typedef u32 (*bpf_convert_ctx_access_t)(enum bpf_access_type type,
356 const struct bpf_insn *src,
357 struct bpf_insn *dst,
358 struct bpf_prog *prog,
361 u64 bpf_event_output(struct bpf_map *map, u64 flags, void *meta, u64 meta_size,
362 void *ctx, u64 ctx_size, bpf_ctx_copy_t ctx_copy);
364 int bpf_prog_test_run_xdp(struct bpf_prog *prog, const union bpf_attr *kattr,
365 union bpf_attr __user *uattr);
366 int bpf_prog_test_run_skb(struct bpf_prog *prog, const union bpf_attr *kattr,
367 union bpf_attr __user *uattr);
369 /* an array of programs to be executed under rcu_lock.
372 * ret = BPF_PROG_RUN_ARRAY(&bpf_prog_array, ctx, BPF_PROG_RUN);
374 * the structure returned by bpf_prog_array_alloc() should be populated
375 * with program pointers and the last pointer must be NULL.
376 * The user has to keep refcnt on the program and make sure the program
377 * is removed from the array before bpf_prog_put().
378 * The 'struct bpf_prog_array *' should only be replaced with xchg()
379 * since other cpus are walking the array of pointers in parallel.
381 struct bpf_prog_array_item {
382 struct bpf_prog *prog;
383 struct bpf_cgroup_storage *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE];
386 struct bpf_prog_array {
388 struct bpf_prog_array_item items[0];
391 struct bpf_prog_array *bpf_prog_array_alloc(u32 prog_cnt, gfp_t flags);
392 void bpf_prog_array_free(struct bpf_prog_array __rcu *progs);
393 int bpf_prog_array_length(struct bpf_prog_array __rcu *progs);
394 int bpf_prog_array_copy_to_user(struct bpf_prog_array __rcu *progs,
395 __u32 __user *prog_ids, u32 cnt);
397 void bpf_prog_array_delete_safe(struct bpf_prog_array __rcu *progs,
398 struct bpf_prog *old_prog);
399 int bpf_prog_array_copy_info(struct bpf_prog_array __rcu *array,
400 u32 *prog_ids, u32 request_cnt,
402 int bpf_prog_array_copy(struct bpf_prog_array __rcu *old_array,
403 struct bpf_prog *exclude_prog,
404 struct bpf_prog *include_prog,
405 struct bpf_prog_array **new_array);
407 #define __BPF_PROG_RUN_ARRAY(array, ctx, func, check_non_null) \
409 struct bpf_prog_array_item *_item; \
410 struct bpf_prog *_prog; \
411 struct bpf_prog_array *_array; \
415 _array = rcu_dereference(array); \
416 if (unlikely(check_non_null && !_array))\
418 _item = &_array->items[0]; \
419 while ((_prog = READ_ONCE(_item->prog))) { \
420 bpf_cgroup_storage_set(_item->cgroup_storage); \
421 _ret &= func(_prog, ctx); \
426 preempt_enable_no_resched(); \
430 #define BPF_PROG_RUN_ARRAY(array, ctx, func) \
431 __BPF_PROG_RUN_ARRAY(array, ctx, func, false)
433 #define BPF_PROG_RUN_ARRAY_CHECK(array, ctx, func) \
434 __BPF_PROG_RUN_ARRAY(array, ctx, func, true)
436 #ifdef CONFIG_BPF_SYSCALL
437 DECLARE_PER_CPU(int, bpf_prog_active);
439 extern const struct file_operations bpf_map_fops;
440 extern const struct file_operations bpf_prog_fops;
442 #define BPF_PROG_TYPE(_id, _name) \
443 extern const struct bpf_prog_ops _name ## _prog_ops; \
444 extern const struct bpf_verifier_ops _name ## _verifier_ops;
445 #define BPF_MAP_TYPE(_id, _ops) \
446 extern const struct bpf_map_ops _ops;
447 #include <linux/bpf_types.h>
451 extern const struct bpf_prog_ops bpf_offload_prog_ops;
452 extern const struct bpf_verifier_ops tc_cls_act_analyzer_ops;
453 extern const struct bpf_verifier_ops xdp_analyzer_ops;
455 struct bpf_prog *bpf_prog_get(u32 ufd);
456 struct bpf_prog *bpf_prog_get_type_dev(u32 ufd, enum bpf_prog_type type,
458 struct bpf_prog * __must_check bpf_prog_add(struct bpf_prog *prog, int i);
459 void bpf_prog_sub(struct bpf_prog *prog, int i);
460 struct bpf_prog * __must_check bpf_prog_inc(struct bpf_prog *prog);
461 struct bpf_prog * __must_check bpf_prog_inc_not_zero(struct bpf_prog *prog);
462 void bpf_prog_put(struct bpf_prog *prog);
463 int __bpf_prog_charge(struct user_struct *user, u32 pages);
464 void __bpf_prog_uncharge(struct user_struct *user, u32 pages);
466 void bpf_prog_free_id(struct bpf_prog *prog, bool do_idr_lock);
467 void bpf_map_free_id(struct bpf_map *map, bool do_idr_lock);
469 struct bpf_map *bpf_map_get_with_uref(u32 ufd);
470 struct bpf_map *__bpf_map_get(struct fd f);
471 struct bpf_map * __must_check bpf_map_inc(struct bpf_map *map, bool uref);
472 void bpf_map_put_with_uref(struct bpf_map *map);
473 void bpf_map_put(struct bpf_map *map);
474 int bpf_map_precharge_memlock(u32 pages);
475 int bpf_map_charge_memlock(struct bpf_map *map, u32 pages);
476 void bpf_map_uncharge_memlock(struct bpf_map *map, u32 pages);
477 void *bpf_map_area_alloc(size_t size, int numa_node);
478 void bpf_map_area_free(void *base);
479 void bpf_map_init_from_attr(struct bpf_map *map, union bpf_attr *attr);
481 extern int sysctl_unprivileged_bpf_disabled;
483 int bpf_map_new_fd(struct bpf_map *map, int flags);
484 int bpf_prog_new_fd(struct bpf_prog *prog);
486 int bpf_obj_pin_user(u32 ufd, const char __user *pathname);
487 int bpf_obj_get_user(const char __user *pathname, int flags);
489 int bpf_percpu_hash_copy(struct bpf_map *map, void *key, void *value);
490 int bpf_percpu_array_copy(struct bpf_map *map, void *key, void *value);
491 int bpf_percpu_hash_update(struct bpf_map *map, void *key, void *value,
493 int bpf_percpu_array_update(struct bpf_map *map, void *key, void *value,
496 int bpf_stackmap_copy(struct bpf_map *map, void *key, void *value);
498 int bpf_fd_array_map_update_elem(struct bpf_map *map, struct file *map_file,
499 void *key, void *value, u64 map_flags);
500 int bpf_fd_array_map_lookup_elem(struct bpf_map *map, void *key, u32 *value);
501 int bpf_fd_htab_map_update_elem(struct bpf_map *map, struct file *map_file,
502 void *key, void *value, u64 map_flags);
503 int bpf_fd_htab_map_lookup_elem(struct bpf_map *map, void *key, u32 *value);
505 int bpf_get_file_flag(int flags);
506 int bpf_check_uarg_tail_zero(void __user *uaddr, size_t expected_size,
509 /* memcpy that is used with 8-byte aligned pointers, power-of-8 size and
510 * forced to use 'long' read/writes to try to atomically copy long counters.
511 * Best-effort only. No barriers here, since it _will_ race with concurrent
512 * updates from BPF programs. Called from bpf syscall and mostly used with
513 * size 8 or 16 bytes, so ask compiler to inline it.
515 static inline void bpf_long_memcpy(void *dst, const void *src, u32 size)
517 const long *lsrc = src;
520 size /= sizeof(long);
525 /* verify correctness of eBPF program */
526 int bpf_check(struct bpf_prog **fp, union bpf_attr *attr);
527 void bpf_patch_call_args(struct bpf_insn *insn, u32 stack_depth);
533 struct bpf_dtab_netdev *__dev_map_lookup_elem(struct bpf_map *map, u32 key);
534 void __dev_map_insert_ctx(struct bpf_map *map, u32 index);
535 void __dev_map_flush(struct bpf_map *map);
536 int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp,
537 struct net_device *dev_rx);
538 int dev_map_generic_redirect(struct bpf_dtab_netdev *dst, struct sk_buff *skb,
539 struct bpf_prog *xdp_prog);
541 struct bpf_cpu_map_entry *__cpu_map_lookup_elem(struct bpf_map *map, u32 key);
542 void __cpu_map_insert_ctx(struct bpf_map *map, u32 index);
543 void __cpu_map_flush(struct bpf_map *map);
544 int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu, struct xdp_buff *xdp,
545 struct net_device *dev_rx);
547 /* Return map's numa specified by userspace */
548 static inline int bpf_map_attr_numa_node(const union bpf_attr *attr)
550 return (attr->map_flags & BPF_F_NUMA_NODE) ?
551 attr->numa_node : NUMA_NO_NODE;
554 struct bpf_prog *bpf_prog_get_type_path(const char *name, enum bpf_prog_type type);
555 int array_map_alloc_check(union bpf_attr *attr);
557 #else /* !CONFIG_BPF_SYSCALL */
558 static inline struct bpf_prog *bpf_prog_get(u32 ufd)
560 return ERR_PTR(-EOPNOTSUPP);
563 static inline struct bpf_prog *bpf_prog_get_type_dev(u32 ufd,
564 enum bpf_prog_type type,
567 return ERR_PTR(-EOPNOTSUPP);
570 static inline struct bpf_prog * __must_check bpf_prog_add(struct bpf_prog *prog,
573 return ERR_PTR(-EOPNOTSUPP);
576 static inline void bpf_prog_sub(struct bpf_prog *prog, int i)
580 static inline void bpf_prog_put(struct bpf_prog *prog)
584 static inline struct bpf_prog * __must_check bpf_prog_inc(struct bpf_prog *prog)
586 return ERR_PTR(-EOPNOTSUPP);
589 static inline struct bpf_prog *__must_check
590 bpf_prog_inc_not_zero(struct bpf_prog *prog)
592 return ERR_PTR(-EOPNOTSUPP);
595 static inline int __bpf_prog_charge(struct user_struct *user, u32 pages)
600 static inline void __bpf_prog_uncharge(struct user_struct *user, u32 pages)
604 static inline int bpf_obj_get_user(const char __user *pathname, int flags)
609 static inline struct net_device *__dev_map_lookup_elem(struct bpf_map *map,
615 static inline void __dev_map_insert_ctx(struct bpf_map *map, u32 index)
619 static inline void __dev_map_flush(struct bpf_map *map)
624 struct bpf_dtab_netdev;
627 int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp,
628 struct net_device *dev_rx)
635 static inline int dev_map_generic_redirect(struct bpf_dtab_netdev *dst,
637 struct bpf_prog *xdp_prog)
643 struct bpf_cpu_map_entry *__cpu_map_lookup_elem(struct bpf_map *map, u32 key)
648 static inline void __cpu_map_insert_ctx(struct bpf_map *map, u32 index)
652 static inline void __cpu_map_flush(struct bpf_map *map)
656 static inline int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu,
657 struct xdp_buff *xdp,
658 struct net_device *dev_rx)
663 static inline struct bpf_prog *bpf_prog_get_type_path(const char *name,
664 enum bpf_prog_type type)
666 return ERR_PTR(-EOPNOTSUPP);
668 #endif /* CONFIG_BPF_SYSCALL */
670 static inline struct bpf_prog *bpf_prog_get_type(u32 ufd,
671 enum bpf_prog_type type)
673 return bpf_prog_get_type_dev(ufd, type, false);
676 bool bpf_prog_get_ok(struct bpf_prog *, enum bpf_prog_type *, bool);
678 int bpf_prog_offload_compile(struct bpf_prog *prog);
679 void bpf_prog_offload_destroy(struct bpf_prog *prog);
680 int bpf_prog_offload_info_fill(struct bpf_prog_info *info,
681 struct bpf_prog *prog);
683 int bpf_map_offload_info_fill(struct bpf_map_info *info, struct bpf_map *map);
685 int bpf_map_offload_lookup_elem(struct bpf_map *map, void *key, void *value);
686 int bpf_map_offload_update_elem(struct bpf_map *map,
687 void *key, void *value, u64 flags);
688 int bpf_map_offload_delete_elem(struct bpf_map *map, void *key);
689 int bpf_map_offload_get_next_key(struct bpf_map *map,
690 void *key, void *next_key);
692 bool bpf_offload_prog_map_match(struct bpf_prog *prog, struct bpf_map *map);
694 struct bpf_offload_dev *bpf_offload_dev_create(void);
695 void bpf_offload_dev_destroy(struct bpf_offload_dev *offdev);
696 int bpf_offload_dev_netdev_register(struct bpf_offload_dev *offdev,
697 struct net_device *netdev);
698 void bpf_offload_dev_netdev_unregister(struct bpf_offload_dev *offdev,
699 struct net_device *netdev);
700 bool bpf_offload_dev_match(struct bpf_prog *prog, struct net_device *netdev);
702 #if defined(CONFIG_NET) && defined(CONFIG_BPF_SYSCALL)
703 int bpf_prog_offload_init(struct bpf_prog *prog, union bpf_attr *attr);
705 static inline bool bpf_prog_is_dev_bound(const struct bpf_prog_aux *aux)
707 return aux->offload_requested;
710 static inline bool bpf_map_is_dev_bound(struct bpf_map *map)
712 return unlikely(map->ops == &bpf_map_offload_ops);
715 struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr);
716 void bpf_map_offload_map_free(struct bpf_map *map);
718 static inline int bpf_prog_offload_init(struct bpf_prog *prog,
719 union bpf_attr *attr)
724 static inline bool bpf_prog_is_dev_bound(struct bpf_prog_aux *aux)
729 static inline bool bpf_map_is_dev_bound(struct bpf_map *map)
734 static inline struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr)
736 return ERR_PTR(-EOPNOTSUPP);
739 static inline void bpf_map_offload_map_free(struct bpf_map *map)
742 #endif /* CONFIG_NET && CONFIG_BPF_SYSCALL */
744 #if defined(CONFIG_BPF_STREAM_PARSER)
745 int sock_map_prog_update(struct bpf_map *map, struct bpf_prog *prog, u32 which);
746 int sock_map_get_from_fd(const union bpf_attr *attr, struct bpf_prog *prog);
748 static inline int sock_map_prog_update(struct bpf_map *map,
749 struct bpf_prog *prog, u32 which)
754 static inline int sock_map_get_from_fd(const union bpf_attr *attr,
755 struct bpf_prog *prog)
761 #if defined(CONFIG_XDP_SOCKETS)
763 struct xdp_sock *__xsk_map_lookup_elem(struct bpf_map *map, u32 key);
764 int __xsk_map_redirect(struct bpf_map *map, struct xdp_buff *xdp,
765 struct xdp_sock *xs);
766 void __xsk_map_flush(struct bpf_map *map);
769 static inline struct xdp_sock *__xsk_map_lookup_elem(struct bpf_map *map,
775 static inline int __xsk_map_redirect(struct bpf_map *map, struct xdp_buff *xdp,
781 static inline void __xsk_map_flush(struct bpf_map *map)
786 #if defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL)
787 void bpf_sk_reuseport_detach(struct sock *sk);
788 int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map, void *key,
790 int bpf_fd_reuseport_array_update_elem(struct bpf_map *map, void *key,
791 void *value, u64 map_flags);
793 static inline void bpf_sk_reuseport_detach(struct sock *sk)
797 #ifdef CONFIG_BPF_SYSCALL
798 static inline int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map,
799 void *key, void *value)
804 static inline int bpf_fd_reuseport_array_update_elem(struct bpf_map *map,
805 void *key, void *value,
810 #endif /* CONFIG_BPF_SYSCALL */
811 #endif /* defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL) */
813 /* verifier prototypes for helper functions called from eBPF programs */
814 extern const struct bpf_func_proto bpf_map_lookup_elem_proto;
815 extern const struct bpf_func_proto bpf_map_update_elem_proto;
816 extern const struct bpf_func_proto bpf_map_delete_elem_proto;
817 extern const struct bpf_func_proto bpf_map_push_elem_proto;
818 extern const struct bpf_func_proto bpf_map_pop_elem_proto;
819 extern const struct bpf_func_proto bpf_map_peek_elem_proto;
821 extern const struct bpf_func_proto bpf_get_prandom_u32_proto;
822 extern const struct bpf_func_proto bpf_get_smp_processor_id_proto;
823 extern const struct bpf_func_proto bpf_get_numa_node_id_proto;
824 extern const struct bpf_func_proto bpf_tail_call_proto;
825 extern const struct bpf_func_proto bpf_ktime_get_ns_proto;
826 extern const struct bpf_func_proto bpf_get_current_pid_tgid_proto;
827 extern const struct bpf_func_proto bpf_get_current_uid_gid_proto;
828 extern const struct bpf_func_proto bpf_get_current_comm_proto;
829 extern const struct bpf_func_proto bpf_get_stackid_proto;
830 extern const struct bpf_func_proto bpf_get_stack_proto;
831 extern const struct bpf_func_proto bpf_sock_map_update_proto;
832 extern const struct bpf_func_proto bpf_sock_hash_update_proto;
833 extern const struct bpf_func_proto bpf_get_current_cgroup_id_proto;
834 extern const struct bpf_func_proto bpf_msg_redirect_hash_proto;
835 extern const struct bpf_func_proto bpf_msg_redirect_map_proto;
836 extern const struct bpf_func_proto bpf_sk_redirect_hash_proto;
837 extern const struct bpf_func_proto bpf_sk_redirect_map_proto;
839 extern const struct bpf_func_proto bpf_get_local_storage_proto;
841 /* Shared helpers among cBPF and eBPF. */
842 void bpf_user_rnd_init_once(void);
843 u64 bpf_user_rnd_u32(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
845 #if defined(CONFIG_NET)
846 bool bpf_sock_is_valid_access(int off, int size, enum bpf_access_type type,
847 struct bpf_insn_access_aux *info);
848 u32 bpf_sock_convert_ctx_access(enum bpf_access_type type,
849 const struct bpf_insn *si,
850 struct bpf_insn *insn_buf,
851 struct bpf_prog *prog,
854 static inline bool bpf_sock_is_valid_access(int off, int size,
855 enum bpf_access_type type,
856 struct bpf_insn_access_aux *info)
860 static inline u32 bpf_sock_convert_ctx_access(enum bpf_access_type type,
861 const struct bpf_insn *si,
862 struct bpf_insn *insn_buf,
863 struct bpf_prog *prog,
870 #endif /* _LINUX_BPF_H */