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,
52 const struct btf_type *key_type,
53 const struct btf_type *value_type);
57 /* The first two cachelines with read-mostly members of which some
58 * are also accessed in fast-path (e.g. ops, max_entries).
60 const struct bpf_map_ops *ops ____cacheline_aligned;
61 struct bpf_map *inner_map_meta;
62 #ifdef CONFIG_SECURITY
65 enum bpf_map_type map_type;
74 u32 btf_value_type_id;
79 /* The 3rd and 4th cacheline with misc members to avoid false sharing
80 * particularly with refcounting.
82 struct user_struct *user ____cacheline_aligned;
85 struct work_struct work;
86 char name[BPF_OBJ_NAME_LEN];
89 struct bpf_offload_dev;
90 struct bpf_offloaded_map;
92 struct bpf_map_dev_ops {
93 int (*map_get_next_key)(struct bpf_offloaded_map *map,
94 void *key, void *next_key);
95 int (*map_lookup_elem)(struct bpf_offloaded_map *map,
96 void *key, void *value);
97 int (*map_update_elem)(struct bpf_offloaded_map *map,
98 void *key, void *value, u64 flags);
99 int (*map_delete_elem)(struct bpf_offloaded_map *map, void *key);
102 struct bpf_offloaded_map {
104 struct net_device *netdev;
105 const struct bpf_map_dev_ops *dev_ops;
107 struct list_head offloads;
110 static inline struct bpf_offloaded_map *map_to_offmap(struct bpf_map *map)
112 return container_of(map, struct bpf_offloaded_map, map);
115 static inline bool bpf_map_offload_neutral(const struct bpf_map *map)
117 return map->map_type == BPF_MAP_TYPE_PERF_EVENT_ARRAY;
120 static inline bool bpf_map_support_seq_show(const struct bpf_map *map)
122 return map->btf && map->ops->map_seq_show_elem;
125 int map_check_no_btf(const struct bpf_map *map,
126 const struct btf_type *key_type,
127 const struct btf_type *value_type);
129 extern const struct bpf_map_ops bpf_map_offload_ops;
131 /* function argument constraints */
133 ARG_DONTCARE = 0, /* unused argument in helper function */
135 /* the following constraints used to prototype
136 * bpf_map_lookup/update/delete_elem() functions
138 ARG_CONST_MAP_PTR, /* const argument used as pointer to bpf_map */
139 ARG_PTR_TO_MAP_KEY, /* pointer to stack used as map key */
140 ARG_PTR_TO_MAP_VALUE, /* pointer to stack used as map value */
142 /* the following constraints used to prototype bpf_memcmp() and other
143 * functions that access data on eBPF program stack
145 ARG_PTR_TO_MEM, /* pointer to valid memory (stack, packet, map value) */
146 ARG_PTR_TO_MEM_OR_NULL, /* pointer to valid memory or NULL */
147 ARG_PTR_TO_UNINIT_MEM, /* pointer to memory does not need to be initialized,
148 * helper function must fill all bytes or clear
149 * them in error case.
152 ARG_CONST_SIZE, /* number of bytes accessed from memory */
153 ARG_CONST_SIZE_OR_ZERO, /* number of bytes accessed from memory or 0 */
155 ARG_PTR_TO_CTX, /* pointer to context */
156 ARG_ANYTHING, /* any (initialized) argument is ok */
157 ARG_PTR_TO_SOCKET, /* pointer to bpf_sock */
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 */
166 RET_PTR_TO_SOCKET_OR_NULL, /* returns a pointer to a socket or NULL */
169 /* eBPF function prototype used by verifier to allow BPF_CALLs from eBPF programs
170 * to in-kernel helper functions and for adjusting imm32 field in BPF_CALL
171 * instructions after verifying
173 struct bpf_func_proto {
174 u64 (*func)(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
177 enum bpf_return_type ret_type;
178 enum bpf_arg_type arg1_type;
179 enum bpf_arg_type arg2_type;
180 enum bpf_arg_type arg3_type;
181 enum bpf_arg_type arg4_type;
182 enum bpf_arg_type arg5_type;
185 /* bpf_context is intentionally undefined structure. Pointer to bpf_context is
186 * the first argument to eBPF programs.
187 * For socket filters: 'struct bpf_context *' == 'struct sk_buff *'
191 enum bpf_access_type {
196 /* types of values stored in eBPF registers */
197 /* Pointer types represent:
200 * pointer + (u16) var
201 * pointer + (u16) var + imm
202 * if (range > 0) then [ptr, ptr + range - off) is safe to access
203 * if (id > 0) means that some 'var' was added
204 * if (off > 0) means that 'imm' was added
207 NOT_INIT = 0, /* nothing was written into register */
208 SCALAR_VALUE, /* reg doesn't contain a valid pointer */
209 PTR_TO_CTX, /* reg points to bpf_context */
210 CONST_PTR_TO_MAP, /* reg points to struct bpf_map */
211 PTR_TO_MAP_VALUE, /* reg points to map element value */
212 PTR_TO_MAP_VALUE_OR_NULL,/* points to map elem value or NULL */
213 PTR_TO_STACK, /* reg == frame_pointer + offset */
214 PTR_TO_PACKET_META, /* skb->data - meta_len */
215 PTR_TO_PACKET, /* reg points to skb->data */
216 PTR_TO_PACKET_END, /* skb->data + headlen */
217 PTR_TO_FLOW_KEYS, /* reg points to bpf_flow_keys */
218 PTR_TO_SOCKET, /* reg points to struct bpf_sock */
219 PTR_TO_SOCKET_OR_NULL, /* reg points to struct bpf_sock or NULL */
222 /* The information passed from prog-specific *_is_valid_access
223 * back to the verifier.
225 struct bpf_insn_access_aux {
226 enum bpf_reg_type reg_type;
231 bpf_ctx_record_field_size(struct bpf_insn_access_aux *aux, u32 size)
233 aux->ctx_field_size = size;
236 struct bpf_prog_ops {
237 int (*test_run)(struct bpf_prog *prog, const union bpf_attr *kattr,
238 union bpf_attr __user *uattr);
241 struct bpf_verifier_ops {
242 /* return eBPF function prototype for verification */
243 const struct bpf_func_proto *
244 (*get_func_proto)(enum bpf_func_id func_id,
245 const struct bpf_prog *prog);
247 /* return true if 'size' wide access at offset 'off' within bpf_context
248 * with 'type' (read or write) is allowed
250 bool (*is_valid_access)(int off, int size, enum bpf_access_type type,
251 const struct bpf_prog *prog,
252 struct bpf_insn_access_aux *info);
253 int (*gen_prologue)(struct bpf_insn *insn, bool direct_write,
254 const struct bpf_prog *prog);
255 int (*gen_ld_abs)(const struct bpf_insn *orig,
256 struct bpf_insn *insn_buf);
257 u32 (*convert_ctx_access)(enum bpf_access_type type,
258 const struct bpf_insn *src,
259 struct bpf_insn *dst,
260 struct bpf_prog *prog, u32 *target_size);
263 struct bpf_prog_offload_ops {
264 int (*insn_hook)(struct bpf_verifier_env *env,
265 int insn_idx, int prev_insn_idx);
266 int (*finalize)(struct bpf_verifier_env *env);
269 struct bpf_prog_offload {
270 struct bpf_prog *prog;
271 struct net_device *netdev;
273 struct list_head offloads;
275 const struct bpf_prog_offload_ops *dev_ops;
280 enum bpf_cgroup_storage_type {
281 BPF_CGROUP_STORAGE_SHARED,
282 BPF_CGROUP_STORAGE_PERCPU,
283 __BPF_CGROUP_STORAGE_MAX
286 #define MAX_BPF_CGROUP_STORAGE_TYPE __BPF_CGROUP_STORAGE_MAX
288 struct bpf_prog_aux {
295 bool offload_requested;
296 struct bpf_prog **func;
297 void *jit_data; /* JIT specific data. arch dependent */
298 struct latch_tree_node ksym_tnode;
299 struct list_head ksym_lnode;
300 const struct bpf_prog_ops *ops;
301 struct bpf_map **used_maps;
302 struct bpf_prog *prog;
303 struct user_struct *user;
304 u64 load_time; /* ns since boottime */
305 struct bpf_map *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE];
306 char name[BPF_OBJ_NAME_LEN];
307 #ifdef CONFIG_SECURITY
310 struct bpf_prog_offload *offload;
312 struct work_struct work;
321 /* 'ownership' of prog_array is claimed by the first program that
322 * is going to use this map or by the first program which FD is stored
323 * in the map to make sure that all callers and callees have the same
324 * prog_type and JITed flag
326 enum bpf_prog_type owner_prog_type;
329 char value[0] __aligned(8);
330 void *ptrs[0] __aligned(8);
331 void __percpu *pptrs[0] __aligned(8);
335 #define MAX_TAIL_CALL_CNT 32
337 struct bpf_event_entry {
338 struct perf_event *event;
339 struct file *perf_file;
340 struct file *map_file;
344 bool bpf_prog_array_compatible(struct bpf_array *array, const struct bpf_prog *fp);
345 int bpf_prog_calc_tag(struct bpf_prog *fp);
347 const struct bpf_func_proto *bpf_get_trace_printk_proto(void);
349 typedef unsigned long (*bpf_ctx_copy_t)(void *dst, const void *src,
350 unsigned long off, unsigned long len);
351 typedef u32 (*bpf_convert_ctx_access_t)(enum bpf_access_type type,
352 const struct bpf_insn *src,
353 struct bpf_insn *dst,
354 struct bpf_prog *prog,
357 u64 bpf_event_output(struct bpf_map *map, u64 flags, void *meta, u64 meta_size,
358 void *ctx, u64 ctx_size, bpf_ctx_copy_t ctx_copy);
360 int bpf_prog_test_run_xdp(struct bpf_prog *prog, const union bpf_attr *kattr,
361 union bpf_attr __user *uattr);
362 int bpf_prog_test_run_skb(struct bpf_prog *prog, const union bpf_attr *kattr,
363 union bpf_attr __user *uattr);
365 /* an array of programs to be executed under rcu_lock.
368 * ret = BPF_PROG_RUN_ARRAY(&bpf_prog_array, ctx, BPF_PROG_RUN);
370 * the structure returned by bpf_prog_array_alloc() should be populated
371 * with program pointers and the last pointer must be NULL.
372 * The user has to keep refcnt on the program and make sure the program
373 * is removed from the array before bpf_prog_put().
374 * The 'struct bpf_prog_array *' should only be replaced with xchg()
375 * since other cpus are walking the array of pointers in parallel.
377 struct bpf_prog_array_item {
378 struct bpf_prog *prog;
379 struct bpf_cgroup_storage *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE];
382 struct bpf_prog_array {
384 struct bpf_prog_array_item items[0];
387 struct bpf_prog_array *bpf_prog_array_alloc(u32 prog_cnt, gfp_t flags);
388 void bpf_prog_array_free(struct bpf_prog_array __rcu *progs);
389 int bpf_prog_array_length(struct bpf_prog_array __rcu *progs);
390 int bpf_prog_array_copy_to_user(struct bpf_prog_array __rcu *progs,
391 __u32 __user *prog_ids, u32 cnt);
393 void bpf_prog_array_delete_safe(struct bpf_prog_array __rcu *progs,
394 struct bpf_prog *old_prog);
395 int bpf_prog_array_copy_info(struct bpf_prog_array __rcu *array,
396 u32 *prog_ids, u32 request_cnt,
398 int bpf_prog_array_copy(struct bpf_prog_array __rcu *old_array,
399 struct bpf_prog *exclude_prog,
400 struct bpf_prog *include_prog,
401 struct bpf_prog_array **new_array);
403 #define __BPF_PROG_RUN_ARRAY(array, ctx, func, check_non_null) \
405 struct bpf_prog_array_item *_item; \
406 struct bpf_prog *_prog; \
407 struct bpf_prog_array *_array; \
411 _array = rcu_dereference(array); \
412 if (unlikely(check_non_null && !_array))\
414 _item = &_array->items[0]; \
415 while ((_prog = READ_ONCE(_item->prog))) { \
416 bpf_cgroup_storage_set(_item->cgroup_storage); \
417 _ret &= func(_prog, ctx); \
422 preempt_enable_no_resched(); \
426 #define BPF_PROG_RUN_ARRAY(array, ctx, func) \
427 __BPF_PROG_RUN_ARRAY(array, ctx, func, false)
429 #define BPF_PROG_RUN_ARRAY_CHECK(array, ctx, func) \
430 __BPF_PROG_RUN_ARRAY(array, ctx, func, true)
432 #ifdef CONFIG_BPF_SYSCALL
433 DECLARE_PER_CPU(int, bpf_prog_active);
435 extern const struct file_operations bpf_map_fops;
436 extern const struct file_operations bpf_prog_fops;
438 #define BPF_PROG_TYPE(_id, _name) \
439 extern const struct bpf_prog_ops _name ## _prog_ops; \
440 extern const struct bpf_verifier_ops _name ## _verifier_ops;
441 #define BPF_MAP_TYPE(_id, _ops) \
442 extern const struct bpf_map_ops _ops;
443 #include <linux/bpf_types.h>
447 extern const struct bpf_prog_ops bpf_offload_prog_ops;
448 extern const struct bpf_verifier_ops tc_cls_act_analyzer_ops;
449 extern const struct bpf_verifier_ops xdp_analyzer_ops;
451 struct bpf_prog *bpf_prog_get(u32 ufd);
452 struct bpf_prog *bpf_prog_get_type_dev(u32 ufd, enum bpf_prog_type type,
454 struct bpf_prog * __must_check bpf_prog_add(struct bpf_prog *prog, int i);
455 void bpf_prog_sub(struct bpf_prog *prog, int i);
456 struct bpf_prog * __must_check bpf_prog_inc(struct bpf_prog *prog);
457 struct bpf_prog * __must_check bpf_prog_inc_not_zero(struct bpf_prog *prog);
458 void bpf_prog_put(struct bpf_prog *prog);
459 int __bpf_prog_charge(struct user_struct *user, u32 pages);
460 void __bpf_prog_uncharge(struct user_struct *user, u32 pages);
462 void bpf_prog_free_id(struct bpf_prog *prog, bool do_idr_lock);
463 void bpf_map_free_id(struct bpf_map *map, bool do_idr_lock);
465 struct bpf_map *bpf_map_get_with_uref(u32 ufd);
466 struct bpf_map *__bpf_map_get(struct fd f);
467 struct bpf_map * __must_check bpf_map_inc(struct bpf_map *map, bool uref);
468 void bpf_map_put_with_uref(struct bpf_map *map);
469 void bpf_map_put(struct bpf_map *map);
470 int bpf_map_precharge_memlock(u32 pages);
471 int bpf_map_charge_memlock(struct bpf_map *map, u32 pages);
472 void bpf_map_uncharge_memlock(struct bpf_map *map, u32 pages);
473 void *bpf_map_area_alloc(size_t size, int numa_node);
474 void bpf_map_area_free(void *base);
475 void bpf_map_init_from_attr(struct bpf_map *map, union bpf_attr *attr);
477 extern int sysctl_unprivileged_bpf_disabled;
479 int bpf_map_new_fd(struct bpf_map *map, int flags);
480 int bpf_prog_new_fd(struct bpf_prog *prog);
482 int bpf_obj_pin_user(u32 ufd, const char __user *pathname);
483 int bpf_obj_get_user(const char __user *pathname, int flags);
485 int bpf_percpu_hash_copy(struct bpf_map *map, void *key, void *value);
486 int bpf_percpu_array_copy(struct bpf_map *map, void *key, void *value);
487 int bpf_percpu_hash_update(struct bpf_map *map, void *key, void *value,
489 int bpf_percpu_array_update(struct bpf_map *map, void *key, void *value,
492 int bpf_stackmap_copy(struct bpf_map *map, void *key, void *value);
494 int bpf_fd_array_map_update_elem(struct bpf_map *map, struct file *map_file,
495 void *key, void *value, u64 map_flags);
496 int bpf_fd_array_map_lookup_elem(struct bpf_map *map, void *key, u32 *value);
497 int bpf_fd_htab_map_update_elem(struct bpf_map *map, struct file *map_file,
498 void *key, void *value, u64 map_flags);
499 int bpf_fd_htab_map_lookup_elem(struct bpf_map *map, void *key, u32 *value);
501 int bpf_get_file_flag(int flags);
502 int bpf_check_uarg_tail_zero(void __user *uaddr, size_t expected_size,
505 /* memcpy that is used with 8-byte aligned pointers, power-of-8 size and
506 * forced to use 'long' read/writes to try to atomically copy long counters.
507 * Best-effort only. No barriers here, since it _will_ race with concurrent
508 * updates from BPF programs. Called from bpf syscall and mostly used with
509 * size 8 or 16 bytes, so ask compiler to inline it.
511 static inline void bpf_long_memcpy(void *dst, const void *src, u32 size)
513 const long *lsrc = src;
516 size /= sizeof(long);
521 /* verify correctness of eBPF program */
522 int bpf_check(struct bpf_prog **fp, union bpf_attr *attr);
523 void bpf_patch_call_args(struct bpf_insn *insn, u32 stack_depth);
529 struct bpf_dtab_netdev *__dev_map_lookup_elem(struct bpf_map *map, u32 key);
530 void __dev_map_insert_ctx(struct bpf_map *map, u32 index);
531 void __dev_map_flush(struct bpf_map *map);
532 int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp,
533 struct net_device *dev_rx);
534 int dev_map_generic_redirect(struct bpf_dtab_netdev *dst, struct sk_buff *skb,
535 struct bpf_prog *xdp_prog);
537 struct bpf_cpu_map_entry *__cpu_map_lookup_elem(struct bpf_map *map, u32 key);
538 void __cpu_map_insert_ctx(struct bpf_map *map, u32 index);
539 void __cpu_map_flush(struct bpf_map *map);
540 int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu, struct xdp_buff *xdp,
541 struct net_device *dev_rx);
543 /* Return map's numa specified by userspace */
544 static inline int bpf_map_attr_numa_node(const union bpf_attr *attr)
546 return (attr->map_flags & BPF_F_NUMA_NODE) ?
547 attr->numa_node : NUMA_NO_NODE;
550 struct bpf_prog *bpf_prog_get_type_path(const char *name, enum bpf_prog_type type);
551 int array_map_alloc_check(union bpf_attr *attr);
553 #else /* !CONFIG_BPF_SYSCALL */
554 static inline struct bpf_prog *bpf_prog_get(u32 ufd)
556 return ERR_PTR(-EOPNOTSUPP);
559 static inline struct bpf_prog *bpf_prog_get_type_dev(u32 ufd,
560 enum bpf_prog_type type,
563 return ERR_PTR(-EOPNOTSUPP);
566 static inline struct bpf_prog * __must_check bpf_prog_add(struct bpf_prog *prog,
569 return ERR_PTR(-EOPNOTSUPP);
572 static inline void bpf_prog_sub(struct bpf_prog *prog, int i)
576 static inline void bpf_prog_put(struct bpf_prog *prog)
580 static inline struct bpf_prog * __must_check bpf_prog_inc(struct bpf_prog *prog)
582 return ERR_PTR(-EOPNOTSUPP);
585 static inline struct bpf_prog *__must_check
586 bpf_prog_inc_not_zero(struct bpf_prog *prog)
588 return ERR_PTR(-EOPNOTSUPP);
591 static inline int __bpf_prog_charge(struct user_struct *user, u32 pages)
596 static inline void __bpf_prog_uncharge(struct user_struct *user, u32 pages)
600 static inline int bpf_obj_get_user(const char __user *pathname, int flags)
605 static inline struct net_device *__dev_map_lookup_elem(struct bpf_map *map,
611 static inline void __dev_map_insert_ctx(struct bpf_map *map, u32 index)
615 static inline void __dev_map_flush(struct bpf_map *map)
620 struct bpf_dtab_netdev;
623 int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp,
624 struct net_device *dev_rx)
631 static inline int dev_map_generic_redirect(struct bpf_dtab_netdev *dst,
633 struct bpf_prog *xdp_prog)
639 struct bpf_cpu_map_entry *__cpu_map_lookup_elem(struct bpf_map *map, u32 key)
644 static inline void __cpu_map_insert_ctx(struct bpf_map *map, u32 index)
648 static inline void __cpu_map_flush(struct bpf_map *map)
652 static inline int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu,
653 struct xdp_buff *xdp,
654 struct net_device *dev_rx)
659 static inline struct bpf_prog *bpf_prog_get_type_path(const char *name,
660 enum bpf_prog_type type)
662 return ERR_PTR(-EOPNOTSUPP);
664 #endif /* CONFIG_BPF_SYSCALL */
666 static inline struct bpf_prog *bpf_prog_get_type(u32 ufd,
667 enum bpf_prog_type type)
669 return bpf_prog_get_type_dev(ufd, type, false);
672 bool bpf_prog_get_ok(struct bpf_prog *, enum bpf_prog_type *, bool);
674 int bpf_prog_offload_compile(struct bpf_prog *prog);
675 void bpf_prog_offload_destroy(struct bpf_prog *prog);
676 int bpf_prog_offload_info_fill(struct bpf_prog_info *info,
677 struct bpf_prog *prog);
679 int bpf_map_offload_info_fill(struct bpf_map_info *info, struct bpf_map *map);
681 int bpf_map_offload_lookup_elem(struct bpf_map *map, void *key, void *value);
682 int bpf_map_offload_update_elem(struct bpf_map *map,
683 void *key, void *value, u64 flags);
684 int bpf_map_offload_delete_elem(struct bpf_map *map, void *key);
685 int bpf_map_offload_get_next_key(struct bpf_map *map,
686 void *key, void *next_key);
688 bool bpf_offload_prog_map_match(struct bpf_prog *prog, struct bpf_map *map);
690 struct bpf_offload_dev *bpf_offload_dev_create(void);
691 void bpf_offload_dev_destroy(struct bpf_offload_dev *offdev);
692 int bpf_offload_dev_netdev_register(struct bpf_offload_dev *offdev,
693 struct net_device *netdev);
694 void bpf_offload_dev_netdev_unregister(struct bpf_offload_dev *offdev,
695 struct net_device *netdev);
696 bool bpf_offload_dev_match(struct bpf_prog *prog, struct net_device *netdev);
698 #if defined(CONFIG_NET) && defined(CONFIG_BPF_SYSCALL)
699 int bpf_prog_offload_init(struct bpf_prog *prog, union bpf_attr *attr);
701 static inline bool bpf_prog_is_dev_bound(const struct bpf_prog_aux *aux)
703 return aux->offload_requested;
706 static inline bool bpf_map_is_dev_bound(struct bpf_map *map)
708 return unlikely(map->ops == &bpf_map_offload_ops);
711 struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr);
712 void bpf_map_offload_map_free(struct bpf_map *map);
714 static inline int bpf_prog_offload_init(struct bpf_prog *prog,
715 union bpf_attr *attr)
720 static inline bool bpf_prog_is_dev_bound(struct bpf_prog_aux *aux)
725 static inline bool bpf_map_is_dev_bound(struct bpf_map *map)
730 static inline struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr)
732 return ERR_PTR(-EOPNOTSUPP);
735 static inline void bpf_map_offload_map_free(struct bpf_map *map)
738 #endif /* CONFIG_NET && CONFIG_BPF_SYSCALL */
740 #if defined(CONFIG_BPF_STREAM_PARSER)
741 int sock_map_prog_update(struct bpf_map *map, struct bpf_prog *prog, u32 which);
742 int sock_map_get_from_fd(const union bpf_attr *attr, struct bpf_prog *prog);
744 static inline int sock_map_prog_update(struct bpf_map *map,
745 struct bpf_prog *prog, u32 which)
750 static inline int sock_map_get_from_fd(const union bpf_attr *attr,
751 struct bpf_prog *prog)
757 #if defined(CONFIG_XDP_SOCKETS)
759 struct xdp_sock *__xsk_map_lookup_elem(struct bpf_map *map, u32 key);
760 int __xsk_map_redirect(struct bpf_map *map, struct xdp_buff *xdp,
761 struct xdp_sock *xs);
762 void __xsk_map_flush(struct bpf_map *map);
765 static inline struct xdp_sock *__xsk_map_lookup_elem(struct bpf_map *map,
771 static inline int __xsk_map_redirect(struct bpf_map *map, struct xdp_buff *xdp,
777 static inline void __xsk_map_flush(struct bpf_map *map)
782 #if defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL)
783 void bpf_sk_reuseport_detach(struct sock *sk);
784 int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map, void *key,
786 int bpf_fd_reuseport_array_update_elem(struct bpf_map *map, void *key,
787 void *value, u64 map_flags);
789 static inline void bpf_sk_reuseport_detach(struct sock *sk)
793 #ifdef CONFIG_BPF_SYSCALL
794 static inline int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map,
795 void *key, void *value)
800 static inline int bpf_fd_reuseport_array_update_elem(struct bpf_map *map,
801 void *key, void *value,
806 #endif /* CONFIG_BPF_SYSCALL */
807 #endif /* defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL) */
809 /* verifier prototypes for helper functions called from eBPF programs */
810 extern const struct bpf_func_proto bpf_map_lookup_elem_proto;
811 extern const struct bpf_func_proto bpf_map_update_elem_proto;
812 extern const struct bpf_func_proto bpf_map_delete_elem_proto;
814 extern const struct bpf_func_proto bpf_get_prandom_u32_proto;
815 extern const struct bpf_func_proto bpf_get_smp_processor_id_proto;
816 extern const struct bpf_func_proto bpf_get_numa_node_id_proto;
817 extern const struct bpf_func_proto bpf_tail_call_proto;
818 extern const struct bpf_func_proto bpf_ktime_get_ns_proto;
819 extern const struct bpf_func_proto bpf_get_current_pid_tgid_proto;
820 extern const struct bpf_func_proto bpf_get_current_uid_gid_proto;
821 extern const struct bpf_func_proto bpf_get_current_comm_proto;
822 extern const struct bpf_func_proto bpf_get_stackid_proto;
823 extern const struct bpf_func_proto bpf_get_stack_proto;
824 extern const struct bpf_func_proto bpf_sock_map_update_proto;
825 extern const struct bpf_func_proto bpf_sock_hash_update_proto;
826 extern const struct bpf_func_proto bpf_get_current_cgroup_id_proto;
827 extern const struct bpf_func_proto bpf_msg_redirect_hash_proto;
828 extern const struct bpf_func_proto bpf_msg_redirect_map_proto;
829 extern const struct bpf_func_proto bpf_sk_redirect_hash_proto;
830 extern const struct bpf_func_proto bpf_sk_redirect_map_proto;
832 extern const struct bpf_func_proto bpf_get_local_storage_proto;
834 /* Shared helpers among cBPF and eBPF. */
835 void bpf_user_rnd_init_once(void);
836 u64 bpf_user_rnd_u32(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
838 #if defined(CONFIG_NET)
839 bool bpf_sock_is_valid_access(int off, int size, enum bpf_access_type type,
840 struct bpf_insn_access_aux *info);
841 u32 bpf_sock_convert_ctx_access(enum bpf_access_type type,
842 const struct bpf_insn *si,
843 struct bpf_insn *insn_buf,
844 struct bpf_prog *prog,
847 static inline bool bpf_sock_is_valid_access(int off, int size,
848 enum bpf_access_type type,
849 struct bpf_insn_access_aux *info)
853 static inline u32 bpf_sock_convert_ctx_access(enum bpf_access_type type,
854 const struct bpf_insn *si,
855 struct bpf_insn *insn_buf,
856 struct bpf_prog *prog,
863 #endif /* _LINUX_BPF_H */