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;
29 /* map is generic key/value storage optionally accesible by eBPF programs */
31 /* funcs callable from userspace (via syscall) */
32 int (*map_alloc_check)(union bpf_attr *attr);
33 struct bpf_map *(*map_alloc)(union bpf_attr *attr);
34 void (*map_release)(struct bpf_map *map, struct file *map_file);
35 void (*map_free)(struct bpf_map *map);
36 int (*map_get_next_key)(struct bpf_map *map, void *key, void *next_key);
37 void (*map_release_uref)(struct bpf_map *map);
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);
43 int (*map_push_elem)(struct bpf_map *map, void *value, u64 flags);
44 int (*map_pop_elem)(struct bpf_map *map, void *value);
45 int (*map_peek_elem)(struct bpf_map *map, void *value);
47 /* funcs called by prog_array and perf_event_array map */
48 void *(*map_fd_get_ptr)(struct bpf_map *map, struct file *map_file,
50 void (*map_fd_put_ptr)(void *ptr);
51 u32 (*map_gen_lookup)(struct bpf_map *map, struct bpf_insn *insn_buf);
52 u32 (*map_fd_sys_lookup_elem)(void *ptr);
53 void (*map_seq_show_elem)(struct bpf_map *map, void *key,
55 int (*map_check_btf)(const struct bpf_map *map,
56 const struct btf *btf,
57 const struct btf_type *key_type,
58 const struct btf_type *value_type);
62 /* The first two cachelines with read-mostly members of which some
63 * are also accessed in fast-path (e.g. ops, max_entries).
65 const struct bpf_map_ops *ops ____cacheline_aligned;
66 struct bpf_map *inner_map_meta;
67 #ifdef CONFIG_SECURITY
70 enum bpf_map_type map_type;
79 u32 btf_value_type_id;
84 /* The 3rd and 4th cacheline with misc members to avoid false sharing
85 * particularly with refcounting.
87 struct user_struct *user ____cacheline_aligned;
90 struct work_struct work;
91 char name[BPF_OBJ_NAME_LEN];
94 struct bpf_offload_dev;
95 struct bpf_offloaded_map;
97 struct bpf_map_dev_ops {
98 int (*map_get_next_key)(struct bpf_offloaded_map *map,
99 void *key, void *next_key);
100 int (*map_lookup_elem)(struct bpf_offloaded_map *map,
101 void *key, void *value);
102 int (*map_update_elem)(struct bpf_offloaded_map *map,
103 void *key, void *value, u64 flags);
104 int (*map_delete_elem)(struct bpf_offloaded_map *map, void *key);
107 struct bpf_offloaded_map {
109 struct net_device *netdev;
110 const struct bpf_map_dev_ops *dev_ops;
112 struct list_head offloads;
115 static inline struct bpf_offloaded_map *map_to_offmap(struct bpf_map *map)
117 return container_of(map, struct bpf_offloaded_map, map);
120 static inline bool bpf_map_offload_neutral(const struct bpf_map *map)
122 return map->map_type == BPF_MAP_TYPE_PERF_EVENT_ARRAY;
125 static inline bool bpf_map_support_seq_show(const struct bpf_map *map)
127 return map->btf && map->ops->map_seq_show_elem;
130 int map_check_no_btf(const struct bpf_map *map,
131 const struct btf *btf,
132 const struct btf_type *key_type,
133 const struct btf_type *value_type);
135 extern const struct bpf_map_ops bpf_map_offload_ops;
137 /* function argument constraints */
139 ARG_DONTCARE = 0, /* unused argument in helper function */
141 /* the following constraints used to prototype
142 * bpf_map_lookup/update/delete_elem() functions
144 ARG_CONST_MAP_PTR, /* const argument used as pointer to bpf_map */
145 ARG_PTR_TO_MAP_KEY, /* pointer to stack used as map key */
146 ARG_PTR_TO_MAP_VALUE, /* pointer to stack used as map value */
147 ARG_PTR_TO_UNINIT_MAP_VALUE, /* pointer to valid memory used to store a map value */
149 /* the following constraints used to prototype bpf_memcmp() and other
150 * functions that access data on eBPF program stack
152 ARG_PTR_TO_MEM, /* pointer to valid memory (stack, packet, map value) */
153 ARG_PTR_TO_MEM_OR_NULL, /* pointer to valid memory or NULL */
154 ARG_PTR_TO_UNINIT_MEM, /* pointer to memory does not need to be initialized,
155 * helper function must fill all bytes or clear
156 * them in error case.
159 ARG_CONST_SIZE, /* number of bytes accessed from memory */
160 ARG_CONST_SIZE_OR_ZERO, /* number of bytes accessed from memory or 0 */
162 ARG_PTR_TO_CTX, /* pointer to context */
163 ARG_ANYTHING, /* any (initialized) argument is ok */
164 ARG_PTR_TO_SOCKET, /* pointer to bpf_sock */
167 /* type of values returned from helper functions */
168 enum bpf_return_type {
169 RET_INTEGER, /* function returns integer */
170 RET_VOID, /* function doesn't return anything */
171 RET_PTR_TO_MAP_VALUE, /* returns a pointer to map elem value */
172 RET_PTR_TO_MAP_VALUE_OR_NULL, /* returns a pointer to map elem value or NULL */
173 RET_PTR_TO_SOCKET_OR_NULL, /* returns a pointer to a socket or NULL */
176 /* eBPF function prototype used by verifier to allow BPF_CALLs from eBPF programs
177 * to in-kernel helper functions and for adjusting imm32 field in BPF_CALL
178 * instructions after verifying
180 struct bpf_func_proto {
181 u64 (*func)(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
184 enum bpf_return_type ret_type;
185 enum bpf_arg_type arg1_type;
186 enum bpf_arg_type arg2_type;
187 enum bpf_arg_type arg3_type;
188 enum bpf_arg_type arg4_type;
189 enum bpf_arg_type arg5_type;
192 /* bpf_context is intentionally undefined structure. Pointer to bpf_context is
193 * the first argument to eBPF programs.
194 * For socket filters: 'struct bpf_context *' == 'struct sk_buff *'
198 enum bpf_access_type {
203 /* types of values stored in eBPF registers */
204 /* Pointer types represent:
207 * pointer + (u16) var
208 * pointer + (u16) var + imm
209 * if (range > 0) then [ptr, ptr + range - off) is safe to access
210 * if (id > 0) means that some 'var' was added
211 * if (off > 0) means that 'imm' was added
214 NOT_INIT = 0, /* nothing was written into register */
215 SCALAR_VALUE, /* reg doesn't contain a valid pointer */
216 PTR_TO_CTX, /* reg points to bpf_context */
217 CONST_PTR_TO_MAP, /* reg points to struct bpf_map */
218 PTR_TO_MAP_VALUE, /* reg points to map element value */
219 PTR_TO_MAP_VALUE_OR_NULL,/* points to map elem value or NULL */
220 PTR_TO_STACK, /* reg == frame_pointer + offset */
221 PTR_TO_PACKET_META, /* skb->data - meta_len */
222 PTR_TO_PACKET, /* reg points to skb->data */
223 PTR_TO_PACKET_END, /* skb->data + headlen */
224 PTR_TO_FLOW_KEYS, /* reg points to bpf_flow_keys */
225 PTR_TO_SOCKET, /* reg points to struct bpf_sock */
226 PTR_TO_SOCKET_OR_NULL, /* reg points to struct bpf_sock or NULL */
229 /* The information passed from prog-specific *_is_valid_access
230 * back to the verifier.
232 struct bpf_insn_access_aux {
233 enum bpf_reg_type reg_type;
238 bpf_ctx_record_field_size(struct bpf_insn_access_aux *aux, u32 size)
240 aux->ctx_field_size = size;
243 struct bpf_prog_ops {
244 int (*test_run)(struct bpf_prog *prog, const union bpf_attr *kattr,
245 union bpf_attr __user *uattr);
248 struct bpf_verifier_ops {
249 /* return eBPF function prototype for verification */
250 const struct bpf_func_proto *
251 (*get_func_proto)(enum bpf_func_id func_id,
252 const struct bpf_prog *prog);
254 /* return true if 'size' wide access at offset 'off' within bpf_context
255 * with 'type' (read or write) is allowed
257 bool (*is_valid_access)(int off, int size, enum bpf_access_type type,
258 const struct bpf_prog *prog,
259 struct bpf_insn_access_aux *info);
260 int (*gen_prologue)(struct bpf_insn *insn, bool direct_write,
261 const struct bpf_prog *prog);
262 int (*gen_ld_abs)(const struct bpf_insn *orig,
263 struct bpf_insn *insn_buf);
264 u32 (*convert_ctx_access)(enum bpf_access_type type,
265 const struct bpf_insn *src,
266 struct bpf_insn *dst,
267 struct bpf_prog *prog, u32 *target_size);
270 struct bpf_prog_offload_ops {
271 int (*insn_hook)(struct bpf_verifier_env *env,
272 int insn_idx, int prev_insn_idx);
273 int (*finalize)(struct bpf_verifier_env *env);
274 int (*prepare)(struct bpf_prog *prog);
275 int (*translate)(struct bpf_prog *prog);
276 void (*destroy)(struct bpf_prog *prog);
279 struct bpf_prog_offload {
280 struct bpf_prog *prog;
281 struct net_device *netdev;
282 struct bpf_offload_dev *offdev;
284 struct list_head offloads;
290 enum bpf_cgroup_storage_type {
291 BPF_CGROUP_STORAGE_SHARED,
292 BPF_CGROUP_STORAGE_PERCPU,
293 __BPF_CGROUP_STORAGE_MAX
296 #define MAX_BPF_CGROUP_STORAGE_TYPE __BPF_CGROUP_STORAGE_MAX
298 struct bpf_prog_aux {
305 u32 func_cnt; /* used by non-func prog as the number of func progs */
306 u32 func_idx; /* 0 for non-func prog, the index in func array for func prog */
307 bool offload_requested;
308 struct bpf_prog **func;
309 void *jit_data; /* JIT specific data. arch dependent */
310 struct latch_tree_node ksym_tnode;
311 struct list_head ksym_lnode;
312 const struct bpf_prog_ops *ops;
313 struct bpf_map **used_maps;
314 struct bpf_prog *prog;
315 struct user_struct *user;
316 u64 load_time; /* ns since boottime */
317 struct bpf_map *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE];
318 char name[BPF_OBJ_NAME_LEN];
319 #ifdef CONFIG_SECURITY
322 struct bpf_prog_offload *offload;
324 struct bpf_func_info *func_info;
325 /* bpf_line_info loaded from userspace. linfo->insn_off
326 * has the xlated insn offset.
327 * Both the main and sub prog share the same linfo.
328 * The subprog can access its first linfo by
329 * using the linfo_idx.
331 struct bpf_line_info *linfo;
332 /* jited_linfo is the jited addr of the linfo. It has a
333 * one to one mapping to linfo:
334 * jited_linfo[i] is the jited addr for the linfo[i]->insn_off.
335 * Both the main and sub prog share the same jited_linfo.
336 * The subprog can access its first jited_linfo by
337 * using the linfo_idx.
342 /* subprog can use linfo_idx to access its first linfo and
344 * main prog always has linfo_idx == 0
348 struct work_struct work;
357 /* 'ownership' of prog_array is claimed by the first program that
358 * is going to use this map or by the first program which FD is stored
359 * in the map to make sure that all callers and callees have the same
360 * prog_type and JITed flag
362 enum bpf_prog_type owner_prog_type;
365 char value[0] __aligned(8);
366 void *ptrs[0] __aligned(8);
367 void __percpu *pptrs[0] __aligned(8);
371 #define MAX_TAIL_CALL_CNT 32
373 struct bpf_event_entry {
374 struct perf_event *event;
375 struct file *perf_file;
376 struct file *map_file;
380 bool bpf_prog_array_compatible(struct bpf_array *array, const struct bpf_prog *fp);
381 int bpf_prog_calc_tag(struct bpf_prog *fp);
383 const struct bpf_func_proto *bpf_get_trace_printk_proto(void);
385 typedef unsigned long (*bpf_ctx_copy_t)(void *dst, const void *src,
386 unsigned long off, unsigned long len);
387 typedef u32 (*bpf_convert_ctx_access_t)(enum bpf_access_type type,
388 const struct bpf_insn *src,
389 struct bpf_insn *dst,
390 struct bpf_prog *prog,
393 u64 bpf_event_output(struct bpf_map *map, u64 flags, void *meta, u64 meta_size,
394 void *ctx, u64 ctx_size, bpf_ctx_copy_t ctx_copy);
396 int bpf_prog_test_run_xdp(struct bpf_prog *prog, const union bpf_attr *kattr,
397 union bpf_attr __user *uattr);
398 int bpf_prog_test_run_skb(struct bpf_prog *prog, const union bpf_attr *kattr,
399 union bpf_attr __user *uattr);
401 /* an array of programs to be executed under rcu_lock.
404 * ret = BPF_PROG_RUN_ARRAY(&bpf_prog_array, ctx, BPF_PROG_RUN);
406 * the structure returned by bpf_prog_array_alloc() should be populated
407 * with program pointers and the last pointer must be NULL.
408 * The user has to keep refcnt on the program and make sure the program
409 * is removed from the array before bpf_prog_put().
410 * The 'struct bpf_prog_array *' should only be replaced with xchg()
411 * since other cpus are walking the array of pointers in parallel.
413 struct bpf_prog_array_item {
414 struct bpf_prog *prog;
415 struct bpf_cgroup_storage *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE];
418 struct bpf_prog_array {
420 struct bpf_prog_array_item items[0];
423 struct bpf_prog_array *bpf_prog_array_alloc(u32 prog_cnt, gfp_t flags);
424 void bpf_prog_array_free(struct bpf_prog_array __rcu *progs);
425 int bpf_prog_array_length(struct bpf_prog_array __rcu *progs);
426 int bpf_prog_array_copy_to_user(struct bpf_prog_array __rcu *progs,
427 __u32 __user *prog_ids, u32 cnt);
429 void bpf_prog_array_delete_safe(struct bpf_prog_array __rcu *progs,
430 struct bpf_prog *old_prog);
431 int bpf_prog_array_copy_info(struct bpf_prog_array __rcu *array,
432 u32 *prog_ids, u32 request_cnt,
434 int bpf_prog_array_copy(struct bpf_prog_array __rcu *old_array,
435 struct bpf_prog *exclude_prog,
436 struct bpf_prog *include_prog,
437 struct bpf_prog_array **new_array);
439 #define __BPF_PROG_RUN_ARRAY(array, ctx, func, check_non_null) \
441 struct bpf_prog_array_item *_item; \
442 struct bpf_prog *_prog; \
443 struct bpf_prog_array *_array; \
447 _array = rcu_dereference(array); \
448 if (unlikely(check_non_null && !_array))\
450 _item = &_array->items[0]; \
451 while ((_prog = READ_ONCE(_item->prog))) { \
452 bpf_cgroup_storage_set(_item->cgroup_storage); \
453 _ret &= func(_prog, ctx); \
458 preempt_enable_no_resched(); \
462 #define BPF_PROG_RUN_ARRAY(array, ctx, func) \
463 __BPF_PROG_RUN_ARRAY(array, ctx, func, false)
465 #define BPF_PROG_RUN_ARRAY_CHECK(array, ctx, func) \
466 __BPF_PROG_RUN_ARRAY(array, ctx, func, true)
468 #ifdef CONFIG_BPF_SYSCALL
469 DECLARE_PER_CPU(int, bpf_prog_active);
471 extern const struct file_operations bpf_map_fops;
472 extern const struct file_operations bpf_prog_fops;
474 #define BPF_PROG_TYPE(_id, _name) \
475 extern const struct bpf_prog_ops _name ## _prog_ops; \
476 extern const struct bpf_verifier_ops _name ## _verifier_ops;
477 #define BPF_MAP_TYPE(_id, _ops) \
478 extern const struct bpf_map_ops _ops;
479 #include <linux/bpf_types.h>
483 extern const struct bpf_prog_ops bpf_offload_prog_ops;
484 extern const struct bpf_verifier_ops tc_cls_act_analyzer_ops;
485 extern const struct bpf_verifier_ops xdp_analyzer_ops;
487 struct bpf_prog *bpf_prog_get(u32 ufd);
488 struct bpf_prog *bpf_prog_get_type_dev(u32 ufd, enum bpf_prog_type type,
490 struct bpf_prog * __must_check bpf_prog_add(struct bpf_prog *prog, int i);
491 void bpf_prog_sub(struct bpf_prog *prog, int i);
492 struct bpf_prog * __must_check bpf_prog_inc(struct bpf_prog *prog);
493 struct bpf_prog * __must_check bpf_prog_inc_not_zero(struct bpf_prog *prog);
494 void bpf_prog_put(struct bpf_prog *prog);
495 int __bpf_prog_charge(struct user_struct *user, u32 pages);
496 void __bpf_prog_uncharge(struct user_struct *user, u32 pages);
498 void bpf_prog_free_id(struct bpf_prog *prog, bool do_idr_lock);
499 void bpf_map_free_id(struct bpf_map *map, bool do_idr_lock);
501 struct bpf_map *bpf_map_get_with_uref(u32 ufd);
502 struct bpf_map *__bpf_map_get(struct fd f);
503 struct bpf_map * __must_check bpf_map_inc(struct bpf_map *map, bool uref);
504 void bpf_map_put_with_uref(struct bpf_map *map);
505 void bpf_map_put(struct bpf_map *map);
506 int bpf_map_precharge_memlock(u32 pages);
507 int bpf_map_charge_memlock(struct bpf_map *map, u32 pages);
508 void bpf_map_uncharge_memlock(struct bpf_map *map, u32 pages);
509 void *bpf_map_area_alloc(size_t size, int numa_node);
510 void bpf_map_area_free(void *base);
511 void bpf_map_init_from_attr(struct bpf_map *map, union bpf_attr *attr);
513 extern int sysctl_unprivileged_bpf_disabled;
515 int bpf_map_new_fd(struct bpf_map *map, int flags);
516 int bpf_prog_new_fd(struct bpf_prog *prog);
518 int bpf_obj_pin_user(u32 ufd, const char __user *pathname);
519 int bpf_obj_get_user(const char __user *pathname, int flags);
521 int bpf_percpu_hash_copy(struct bpf_map *map, void *key, void *value);
522 int bpf_percpu_array_copy(struct bpf_map *map, void *key, void *value);
523 int bpf_percpu_hash_update(struct bpf_map *map, void *key, void *value,
525 int bpf_percpu_array_update(struct bpf_map *map, void *key, void *value,
528 int bpf_stackmap_copy(struct bpf_map *map, void *key, void *value);
530 int bpf_fd_array_map_update_elem(struct bpf_map *map, struct file *map_file,
531 void *key, void *value, u64 map_flags);
532 int bpf_fd_array_map_lookup_elem(struct bpf_map *map, void *key, u32 *value);
533 int bpf_fd_htab_map_update_elem(struct bpf_map *map, struct file *map_file,
534 void *key, void *value, u64 map_flags);
535 int bpf_fd_htab_map_lookup_elem(struct bpf_map *map, void *key, u32 *value);
537 int bpf_get_file_flag(int flags);
538 int bpf_check_uarg_tail_zero(void __user *uaddr, size_t expected_size,
541 /* memcpy that is used with 8-byte aligned pointers, power-of-8 size and
542 * forced to use 'long' read/writes to try to atomically copy long counters.
543 * Best-effort only. No barriers here, since it _will_ race with concurrent
544 * updates from BPF programs. Called from bpf syscall and mostly used with
545 * size 8 or 16 bytes, so ask compiler to inline it.
547 static inline void bpf_long_memcpy(void *dst, const void *src, u32 size)
549 const long *lsrc = src;
552 size /= sizeof(long);
557 /* verify correctness of eBPF program */
558 int bpf_check(struct bpf_prog **fp, union bpf_attr *attr,
559 union bpf_attr __user *uattr);
560 void bpf_patch_call_args(struct bpf_insn *insn, u32 stack_depth);
566 struct bpf_dtab_netdev *__dev_map_lookup_elem(struct bpf_map *map, u32 key);
567 void __dev_map_insert_ctx(struct bpf_map *map, u32 index);
568 void __dev_map_flush(struct bpf_map *map);
569 int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp,
570 struct net_device *dev_rx);
571 int dev_map_generic_redirect(struct bpf_dtab_netdev *dst, struct sk_buff *skb,
572 struct bpf_prog *xdp_prog);
574 struct bpf_cpu_map_entry *__cpu_map_lookup_elem(struct bpf_map *map, u32 key);
575 void __cpu_map_insert_ctx(struct bpf_map *map, u32 index);
576 void __cpu_map_flush(struct bpf_map *map);
577 int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu, struct xdp_buff *xdp,
578 struct net_device *dev_rx);
580 /* Return map's numa specified by userspace */
581 static inline int bpf_map_attr_numa_node(const union bpf_attr *attr)
583 return (attr->map_flags & BPF_F_NUMA_NODE) ?
584 attr->numa_node : NUMA_NO_NODE;
587 struct bpf_prog *bpf_prog_get_type_path(const char *name, enum bpf_prog_type type);
588 int array_map_alloc_check(union bpf_attr *attr);
590 #else /* !CONFIG_BPF_SYSCALL */
591 static inline struct bpf_prog *bpf_prog_get(u32 ufd)
593 return ERR_PTR(-EOPNOTSUPP);
596 static inline struct bpf_prog *bpf_prog_get_type_dev(u32 ufd,
597 enum bpf_prog_type type,
600 return ERR_PTR(-EOPNOTSUPP);
603 static inline struct bpf_prog * __must_check bpf_prog_add(struct bpf_prog *prog,
606 return ERR_PTR(-EOPNOTSUPP);
609 static inline void bpf_prog_sub(struct bpf_prog *prog, int i)
613 static inline void bpf_prog_put(struct bpf_prog *prog)
617 static inline struct bpf_prog * __must_check bpf_prog_inc(struct bpf_prog *prog)
619 return ERR_PTR(-EOPNOTSUPP);
622 static inline struct bpf_prog *__must_check
623 bpf_prog_inc_not_zero(struct bpf_prog *prog)
625 return ERR_PTR(-EOPNOTSUPP);
628 static inline int __bpf_prog_charge(struct user_struct *user, u32 pages)
633 static inline void __bpf_prog_uncharge(struct user_struct *user, u32 pages)
637 static inline int bpf_obj_get_user(const char __user *pathname, int flags)
642 static inline struct net_device *__dev_map_lookup_elem(struct bpf_map *map,
648 static inline void __dev_map_insert_ctx(struct bpf_map *map, u32 index)
652 static inline void __dev_map_flush(struct bpf_map *map)
657 struct bpf_dtab_netdev;
660 int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp,
661 struct net_device *dev_rx)
668 static inline int dev_map_generic_redirect(struct bpf_dtab_netdev *dst,
670 struct bpf_prog *xdp_prog)
676 struct bpf_cpu_map_entry *__cpu_map_lookup_elem(struct bpf_map *map, u32 key)
681 static inline void __cpu_map_insert_ctx(struct bpf_map *map, u32 index)
685 static inline void __cpu_map_flush(struct bpf_map *map)
689 static inline int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu,
690 struct xdp_buff *xdp,
691 struct net_device *dev_rx)
696 static inline struct bpf_prog *bpf_prog_get_type_path(const char *name,
697 enum bpf_prog_type type)
699 return ERR_PTR(-EOPNOTSUPP);
701 #endif /* CONFIG_BPF_SYSCALL */
703 static inline struct bpf_prog *bpf_prog_get_type(u32 ufd,
704 enum bpf_prog_type type)
706 return bpf_prog_get_type_dev(ufd, type, false);
709 bool bpf_prog_get_ok(struct bpf_prog *, enum bpf_prog_type *, bool);
711 int bpf_prog_offload_compile(struct bpf_prog *prog);
712 void bpf_prog_offload_destroy(struct bpf_prog *prog);
713 int bpf_prog_offload_info_fill(struct bpf_prog_info *info,
714 struct bpf_prog *prog);
716 int bpf_map_offload_info_fill(struct bpf_map_info *info, struct bpf_map *map);
718 int bpf_map_offload_lookup_elem(struct bpf_map *map, void *key, void *value);
719 int bpf_map_offload_update_elem(struct bpf_map *map,
720 void *key, void *value, u64 flags);
721 int bpf_map_offload_delete_elem(struct bpf_map *map, void *key);
722 int bpf_map_offload_get_next_key(struct bpf_map *map,
723 void *key, void *next_key);
725 bool bpf_offload_prog_map_match(struct bpf_prog *prog, struct bpf_map *map);
727 struct bpf_offload_dev *
728 bpf_offload_dev_create(const struct bpf_prog_offload_ops *ops);
729 void bpf_offload_dev_destroy(struct bpf_offload_dev *offdev);
730 int bpf_offload_dev_netdev_register(struct bpf_offload_dev *offdev,
731 struct net_device *netdev);
732 void bpf_offload_dev_netdev_unregister(struct bpf_offload_dev *offdev,
733 struct net_device *netdev);
734 bool bpf_offload_dev_match(struct bpf_prog *prog, struct net_device *netdev);
736 #if defined(CONFIG_NET) && defined(CONFIG_BPF_SYSCALL)
737 int bpf_prog_offload_init(struct bpf_prog *prog, union bpf_attr *attr);
739 static inline bool bpf_prog_is_dev_bound(const struct bpf_prog_aux *aux)
741 return aux->offload_requested;
744 static inline bool bpf_map_is_dev_bound(struct bpf_map *map)
746 return unlikely(map->ops == &bpf_map_offload_ops);
749 struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr);
750 void bpf_map_offload_map_free(struct bpf_map *map);
752 static inline int bpf_prog_offload_init(struct bpf_prog *prog,
753 union bpf_attr *attr)
758 static inline bool bpf_prog_is_dev_bound(struct bpf_prog_aux *aux)
763 static inline bool bpf_map_is_dev_bound(struct bpf_map *map)
768 static inline struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr)
770 return ERR_PTR(-EOPNOTSUPP);
773 static inline void bpf_map_offload_map_free(struct bpf_map *map)
776 #endif /* CONFIG_NET && CONFIG_BPF_SYSCALL */
778 #if defined(CONFIG_BPF_STREAM_PARSER)
779 int sock_map_prog_update(struct bpf_map *map, struct bpf_prog *prog, u32 which);
780 int sock_map_get_from_fd(const union bpf_attr *attr, struct bpf_prog *prog);
782 static inline int sock_map_prog_update(struct bpf_map *map,
783 struct bpf_prog *prog, u32 which)
788 static inline int sock_map_get_from_fd(const union bpf_attr *attr,
789 struct bpf_prog *prog)
795 #if defined(CONFIG_XDP_SOCKETS)
797 struct xdp_sock *__xsk_map_lookup_elem(struct bpf_map *map, u32 key);
798 int __xsk_map_redirect(struct bpf_map *map, struct xdp_buff *xdp,
799 struct xdp_sock *xs);
800 void __xsk_map_flush(struct bpf_map *map);
803 static inline struct xdp_sock *__xsk_map_lookup_elem(struct bpf_map *map,
809 static inline int __xsk_map_redirect(struct bpf_map *map, struct xdp_buff *xdp,
815 static inline void __xsk_map_flush(struct bpf_map *map)
820 #if defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL)
821 void bpf_sk_reuseport_detach(struct sock *sk);
822 int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map, void *key,
824 int bpf_fd_reuseport_array_update_elem(struct bpf_map *map, void *key,
825 void *value, u64 map_flags);
827 static inline void bpf_sk_reuseport_detach(struct sock *sk)
831 #ifdef CONFIG_BPF_SYSCALL
832 static inline int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map,
833 void *key, void *value)
838 static inline int bpf_fd_reuseport_array_update_elem(struct bpf_map *map,
839 void *key, void *value,
844 #endif /* CONFIG_BPF_SYSCALL */
845 #endif /* defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL) */
847 /* verifier prototypes for helper functions called from eBPF programs */
848 extern const struct bpf_func_proto bpf_map_lookup_elem_proto;
849 extern const struct bpf_func_proto bpf_map_update_elem_proto;
850 extern const struct bpf_func_proto bpf_map_delete_elem_proto;
851 extern const struct bpf_func_proto bpf_map_push_elem_proto;
852 extern const struct bpf_func_proto bpf_map_pop_elem_proto;
853 extern const struct bpf_func_proto bpf_map_peek_elem_proto;
855 extern const struct bpf_func_proto bpf_get_prandom_u32_proto;
856 extern const struct bpf_func_proto bpf_get_smp_processor_id_proto;
857 extern const struct bpf_func_proto bpf_get_numa_node_id_proto;
858 extern const struct bpf_func_proto bpf_tail_call_proto;
859 extern const struct bpf_func_proto bpf_ktime_get_ns_proto;
860 extern const struct bpf_func_proto bpf_get_current_pid_tgid_proto;
861 extern const struct bpf_func_proto bpf_get_current_uid_gid_proto;
862 extern const struct bpf_func_proto bpf_get_current_comm_proto;
863 extern const struct bpf_func_proto bpf_get_stackid_proto;
864 extern const struct bpf_func_proto bpf_get_stack_proto;
865 extern const struct bpf_func_proto bpf_sock_map_update_proto;
866 extern const struct bpf_func_proto bpf_sock_hash_update_proto;
867 extern const struct bpf_func_proto bpf_get_current_cgroup_id_proto;
868 extern const struct bpf_func_proto bpf_msg_redirect_hash_proto;
869 extern const struct bpf_func_proto bpf_msg_redirect_map_proto;
870 extern const struct bpf_func_proto bpf_sk_redirect_hash_proto;
871 extern const struct bpf_func_proto bpf_sk_redirect_map_proto;
873 extern const struct bpf_func_proto bpf_get_local_storage_proto;
875 /* Shared helpers among cBPF and eBPF. */
876 void bpf_user_rnd_init_once(void);
877 u64 bpf_user_rnd_u32(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
879 #if defined(CONFIG_NET)
880 bool bpf_sock_is_valid_access(int off, int size, enum bpf_access_type type,
881 struct bpf_insn_access_aux *info);
882 u32 bpf_sock_convert_ctx_access(enum bpf_access_type type,
883 const struct bpf_insn *si,
884 struct bpf_insn *insn_buf,
885 struct bpf_prog *prog,
888 static inline bool bpf_sock_is_valid_access(int off, int size,
889 enum bpf_access_type type,
890 struct bpf_insn_access_aux *info)
894 static inline u32 bpf_sock_convert_ctx_access(enum bpf_access_type type,
895 const struct bpf_insn *si,
896 struct bpf_insn *insn_buf,
897 struct bpf_prog *prog,
904 #endif /* _LINUX_BPF_H */