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;
75 int spin_lock_off; /* >=0 valid offset, <0 error */
79 u32 btf_value_type_id;
85 /* The 3rd and 4th cacheline with misc members to avoid false sharing
86 * particularly with refcounting.
88 struct user_struct *user ____cacheline_aligned;
91 struct work_struct work;
92 char name[BPF_OBJ_NAME_LEN];
95 static inline bool map_value_has_spin_lock(const struct bpf_map *map)
97 return map->spin_lock_off >= 0;
100 static inline void check_and_init_map_lock(struct bpf_map *map, void *dst)
102 if (likely(!map_value_has_spin_lock(map)))
104 *(struct bpf_spin_lock *)(dst + map->spin_lock_off) =
105 (struct bpf_spin_lock){};
108 /* copy everything but bpf_spin_lock */
109 static inline void copy_map_value(struct bpf_map *map, void *dst, void *src)
111 if (unlikely(map_value_has_spin_lock(map))) {
112 u32 off = map->spin_lock_off;
114 memcpy(dst, src, off);
115 memcpy(dst + off + sizeof(struct bpf_spin_lock),
116 src + off + sizeof(struct bpf_spin_lock),
117 map->value_size - off - sizeof(struct bpf_spin_lock));
119 memcpy(dst, src, map->value_size);
123 struct bpf_offload_dev;
124 struct bpf_offloaded_map;
126 struct bpf_map_dev_ops {
127 int (*map_get_next_key)(struct bpf_offloaded_map *map,
128 void *key, void *next_key);
129 int (*map_lookup_elem)(struct bpf_offloaded_map *map,
130 void *key, void *value);
131 int (*map_update_elem)(struct bpf_offloaded_map *map,
132 void *key, void *value, u64 flags);
133 int (*map_delete_elem)(struct bpf_offloaded_map *map, void *key);
136 struct bpf_offloaded_map {
138 struct net_device *netdev;
139 const struct bpf_map_dev_ops *dev_ops;
141 struct list_head offloads;
144 static inline struct bpf_offloaded_map *map_to_offmap(struct bpf_map *map)
146 return container_of(map, struct bpf_offloaded_map, map);
149 static inline bool bpf_map_offload_neutral(const struct bpf_map *map)
151 return map->map_type == BPF_MAP_TYPE_PERF_EVENT_ARRAY;
154 static inline bool bpf_map_support_seq_show(const struct bpf_map *map)
156 return map->btf && map->ops->map_seq_show_elem;
159 int map_check_no_btf(const struct bpf_map *map,
160 const struct btf *btf,
161 const struct btf_type *key_type,
162 const struct btf_type *value_type);
164 extern const struct bpf_map_ops bpf_map_offload_ops;
166 /* function argument constraints */
168 ARG_DONTCARE = 0, /* unused argument in helper function */
170 /* the following constraints used to prototype
171 * bpf_map_lookup/update/delete_elem() functions
173 ARG_CONST_MAP_PTR, /* const argument used as pointer to bpf_map */
174 ARG_PTR_TO_MAP_KEY, /* pointer to stack used as map key */
175 ARG_PTR_TO_MAP_VALUE, /* pointer to stack used as map value */
176 ARG_PTR_TO_UNINIT_MAP_VALUE, /* pointer to valid memory used to store a map value */
178 /* the following constraints used to prototype bpf_memcmp() and other
179 * functions that access data on eBPF program stack
181 ARG_PTR_TO_MEM, /* pointer to valid memory (stack, packet, map value) */
182 ARG_PTR_TO_MEM_OR_NULL, /* pointer to valid memory or NULL */
183 ARG_PTR_TO_UNINIT_MEM, /* pointer to memory does not need to be initialized,
184 * helper function must fill all bytes or clear
185 * them in error case.
188 ARG_CONST_SIZE, /* number of bytes accessed from memory */
189 ARG_CONST_SIZE_OR_ZERO, /* number of bytes accessed from memory or 0 */
191 ARG_PTR_TO_CTX, /* pointer to context */
192 ARG_ANYTHING, /* any (initialized) argument is ok */
193 ARG_PTR_TO_SOCKET, /* pointer to bpf_sock */
194 ARG_PTR_TO_SPIN_LOCK, /* pointer to bpf_spin_lock */
197 /* type of values returned from helper functions */
198 enum bpf_return_type {
199 RET_INTEGER, /* function returns integer */
200 RET_VOID, /* function doesn't return anything */
201 RET_PTR_TO_MAP_VALUE, /* returns a pointer to map elem value */
202 RET_PTR_TO_MAP_VALUE_OR_NULL, /* returns a pointer to map elem value or NULL */
203 RET_PTR_TO_SOCKET_OR_NULL, /* returns a pointer to a socket or NULL */
206 /* eBPF function prototype used by verifier to allow BPF_CALLs from eBPF programs
207 * to in-kernel helper functions and for adjusting imm32 field in BPF_CALL
208 * instructions after verifying
210 struct bpf_func_proto {
211 u64 (*func)(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
214 enum bpf_return_type ret_type;
215 enum bpf_arg_type arg1_type;
216 enum bpf_arg_type arg2_type;
217 enum bpf_arg_type arg3_type;
218 enum bpf_arg_type arg4_type;
219 enum bpf_arg_type arg5_type;
222 /* bpf_context is intentionally undefined structure. Pointer to bpf_context is
223 * the first argument to eBPF programs.
224 * For socket filters: 'struct bpf_context *' == 'struct sk_buff *'
228 enum bpf_access_type {
233 /* types of values stored in eBPF registers */
234 /* Pointer types represent:
237 * pointer + (u16) var
238 * pointer + (u16) var + imm
239 * if (range > 0) then [ptr, ptr + range - off) is safe to access
240 * if (id > 0) means that some 'var' was added
241 * if (off > 0) means that 'imm' was added
244 NOT_INIT = 0, /* nothing was written into register */
245 SCALAR_VALUE, /* reg doesn't contain a valid pointer */
246 PTR_TO_CTX, /* reg points to bpf_context */
247 CONST_PTR_TO_MAP, /* reg points to struct bpf_map */
248 PTR_TO_MAP_VALUE, /* reg points to map element value */
249 PTR_TO_MAP_VALUE_OR_NULL,/* points to map elem value or NULL */
250 PTR_TO_STACK, /* reg == frame_pointer + offset */
251 PTR_TO_PACKET_META, /* skb->data - meta_len */
252 PTR_TO_PACKET, /* reg points to skb->data */
253 PTR_TO_PACKET_END, /* skb->data + headlen */
254 PTR_TO_FLOW_KEYS, /* reg points to bpf_flow_keys */
255 PTR_TO_SOCKET, /* reg points to struct bpf_sock */
256 PTR_TO_SOCKET_OR_NULL, /* reg points to struct bpf_sock or NULL */
259 /* The information passed from prog-specific *_is_valid_access
260 * back to the verifier.
262 struct bpf_insn_access_aux {
263 enum bpf_reg_type reg_type;
268 bpf_ctx_record_field_size(struct bpf_insn_access_aux *aux, u32 size)
270 aux->ctx_field_size = size;
273 struct bpf_prog_ops {
274 int (*test_run)(struct bpf_prog *prog, const union bpf_attr *kattr,
275 union bpf_attr __user *uattr);
278 struct bpf_verifier_ops {
279 /* return eBPF function prototype for verification */
280 const struct bpf_func_proto *
281 (*get_func_proto)(enum bpf_func_id func_id,
282 const struct bpf_prog *prog);
284 /* return true if 'size' wide access at offset 'off' within bpf_context
285 * with 'type' (read or write) is allowed
287 bool (*is_valid_access)(int off, int size, enum bpf_access_type type,
288 const struct bpf_prog *prog,
289 struct bpf_insn_access_aux *info);
290 int (*gen_prologue)(struct bpf_insn *insn, bool direct_write,
291 const struct bpf_prog *prog);
292 int (*gen_ld_abs)(const struct bpf_insn *orig,
293 struct bpf_insn *insn_buf);
294 u32 (*convert_ctx_access)(enum bpf_access_type type,
295 const struct bpf_insn *src,
296 struct bpf_insn *dst,
297 struct bpf_prog *prog, u32 *target_size);
300 struct bpf_prog_offload_ops {
301 /* verifier basic callbacks */
302 int (*insn_hook)(struct bpf_verifier_env *env,
303 int insn_idx, int prev_insn_idx);
304 int (*finalize)(struct bpf_verifier_env *env);
305 /* verifier optimization callbacks (called after .finalize) */
306 int (*replace_insn)(struct bpf_verifier_env *env, u32 off,
307 struct bpf_insn *insn);
308 int (*remove_insns)(struct bpf_verifier_env *env, u32 off, u32 cnt);
309 /* program management callbacks */
310 int (*prepare)(struct bpf_prog *prog);
311 int (*translate)(struct bpf_prog *prog);
312 void (*destroy)(struct bpf_prog *prog);
315 struct bpf_prog_offload {
316 struct bpf_prog *prog;
317 struct net_device *netdev;
318 struct bpf_offload_dev *offdev;
320 struct list_head offloads;
327 enum bpf_cgroup_storage_type {
328 BPF_CGROUP_STORAGE_SHARED,
329 BPF_CGROUP_STORAGE_PERCPU,
330 __BPF_CGROUP_STORAGE_MAX
333 #define MAX_BPF_CGROUP_STORAGE_TYPE __BPF_CGROUP_STORAGE_MAX
335 struct bpf_prog_aux {
342 u32 func_cnt; /* used by non-func prog as the number of func progs */
343 u32 func_idx; /* 0 for non-func prog, the index in func array for func prog */
344 bool offload_requested;
345 struct bpf_prog **func;
346 void *jit_data; /* JIT specific data. arch dependent */
347 struct latch_tree_node ksym_tnode;
348 struct list_head ksym_lnode;
349 const struct bpf_prog_ops *ops;
350 struct bpf_map **used_maps;
351 struct bpf_prog *prog;
352 struct user_struct *user;
353 u64 load_time; /* ns since boottime */
354 struct bpf_map *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE];
355 char name[BPF_OBJ_NAME_LEN];
356 #ifdef CONFIG_SECURITY
359 struct bpf_prog_offload *offload;
361 struct bpf_func_info *func_info;
362 /* bpf_line_info loaded from userspace. linfo->insn_off
363 * has the xlated insn offset.
364 * Both the main and sub prog share the same linfo.
365 * The subprog can access its first linfo by
366 * using the linfo_idx.
368 struct bpf_line_info *linfo;
369 /* jited_linfo is the jited addr of the linfo. It has a
370 * one to one mapping to linfo:
371 * jited_linfo[i] is the jited addr for the linfo[i]->insn_off.
372 * Both the main and sub prog share the same jited_linfo.
373 * The subprog can access its first jited_linfo by
374 * using the linfo_idx.
379 /* subprog can use linfo_idx to access its first linfo and
381 * main prog always has linfo_idx == 0
385 struct work_struct work;
394 /* 'ownership' of prog_array is claimed by the first program that
395 * is going to use this map or by the first program which FD is stored
396 * in the map to make sure that all callers and callees have the same
397 * prog_type and JITed flag
399 enum bpf_prog_type owner_prog_type;
402 char value[0] __aligned(8);
403 void *ptrs[0] __aligned(8);
404 void __percpu *pptrs[0] __aligned(8);
408 #define MAX_TAIL_CALL_CNT 32
410 struct bpf_event_entry {
411 struct perf_event *event;
412 struct file *perf_file;
413 struct file *map_file;
417 bool bpf_prog_array_compatible(struct bpf_array *array, const struct bpf_prog *fp);
418 int bpf_prog_calc_tag(struct bpf_prog *fp);
420 const struct bpf_func_proto *bpf_get_trace_printk_proto(void);
422 typedef unsigned long (*bpf_ctx_copy_t)(void *dst, const void *src,
423 unsigned long off, unsigned long len);
424 typedef u32 (*bpf_convert_ctx_access_t)(enum bpf_access_type type,
425 const struct bpf_insn *src,
426 struct bpf_insn *dst,
427 struct bpf_prog *prog,
430 u64 bpf_event_output(struct bpf_map *map, u64 flags, void *meta, u64 meta_size,
431 void *ctx, u64 ctx_size, bpf_ctx_copy_t ctx_copy);
433 int bpf_prog_test_run_xdp(struct bpf_prog *prog, const union bpf_attr *kattr,
434 union bpf_attr __user *uattr);
435 int bpf_prog_test_run_skb(struct bpf_prog *prog, const union bpf_attr *kattr,
436 union bpf_attr __user *uattr);
437 int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog,
438 const union bpf_attr *kattr,
439 union bpf_attr __user *uattr);
441 /* an array of programs to be executed under rcu_lock.
444 * ret = BPF_PROG_RUN_ARRAY(&bpf_prog_array, ctx, BPF_PROG_RUN);
446 * the structure returned by bpf_prog_array_alloc() should be populated
447 * with program pointers and the last pointer must be NULL.
448 * The user has to keep refcnt on the program and make sure the program
449 * is removed from the array before bpf_prog_put().
450 * The 'struct bpf_prog_array *' should only be replaced with xchg()
451 * since other cpus are walking the array of pointers in parallel.
453 struct bpf_prog_array_item {
454 struct bpf_prog *prog;
455 struct bpf_cgroup_storage *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE];
458 struct bpf_prog_array {
460 struct bpf_prog_array_item items[0];
463 struct bpf_prog_array *bpf_prog_array_alloc(u32 prog_cnt, gfp_t flags);
464 void bpf_prog_array_free(struct bpf_prog_array __rcu *progs);
465 int bpf_prog_array_length(struct bpf_prog_array __rcu *progs);
466 int bpf_prog_array_copy_to_user(struct bpf_prog_array __rcu *progs,
467 __u32 __user *prog_ids, u32 cnt);
469 void bpf_prog_array_delete_safe(struct bpf_prog_array __rcu *progs,
470 struct bpf_prog *old_prog);
471 int bpf_prog_array_copy_info(struct bpf_prog_array __rcu *array,
472 u32 *prog_ids, u32 request_cnt,
474 int bpf_prog_array_copy(struct bpf_prog_array __rcu *old_array,
475 struct bpf_prog *exclude_prog,
476 struct bpf_prog *include_prog,
477 struct bpf_prog_array **new_array);
479 #define __BPF_PROG_RUN_ARRAY(array, ctx, func, check_non_null) \
481 struct bpf_prog_array_item *_item; \
482 struct bpf_prog *_prog; \
483 struct bpf_prog_array *_array; \
487 _array = rcu_dereference(array); \
488 if (unlikely(check_non_null && !_array))\
490 _item = &_array->items[0]; \
491 while ((_prog = READ_ONCE(_item->prog))) { \
492 bpf_cgroup_storage_set(_item->cgroup_storage); \
493 _ret &= func(_prog, ctx); \
498 preempt_enable_no_resched(); \
502 #define BPF_PROG_RUN_ARRAY(array, ctx, func) \
503 __BPF_PROG_RUN_ARRAY(array, ctx, func, false)
505 #define BPF_PROG_RUN_ARRAY_CHECK(array, ctx, func) \
506 __BPF_PROG_RUN_ARRAY(array, ctx, func, true)
508 #ifdef CONFIG_BPF_SYSCALL
509 DECLARE_PER_CPU(int, bpf_prog_active);
511 extern const struct file_operations bpf_map_fops;
512 extern const struct file_operations bpf_prog_fops;
514 #define BPF_PROG_TYPE(_id, _name) \
515 extern const struct bpf_prog_ops _name ## _prog_ops; \
516 extern const struct bpf_verifier_ops _name ## _verifier_ops;
517 #define BPF_MAP_TYPE(_id, _ops) \
518 extern const struct bpf_map_ops _ops;
519 #include <linux/bpf_types.h>
523 extern const struct bpf_prog_ops bpf_offload_prog_ops;
524 extern const struct bpf_verifier_ops tc_cls_act_analyzer_ops;
525 extern const struct bpf_verifier_ops xdp_analyzer_ops;
527 struct bpf_prog *bpf_prog_get(u32 ufd);
528 struct bpf_prog *bpf_prog_get_type_dev(u32 ufd, enum bpf_prog_type type,
530 struct bpf_prog * __must_check bpf_prog_add(struct bpf_prog *prog, int i);
531 void bpf_prog_sub(struct bpf_prog *prog, int i);
532 struct bpf_prog * __must_check bpf_prog_inc(struct bpf_prog *prog);
533 struct bpf_prog * __must_check bpf_prog_inc_not_zero(struct bpf_prog *prog);
534 void bpf_prog_put(struct bpf_prog *prog);
535 int __bpf_prog_charge(struct user_struct *user, u32 pages);
536 void __bpf_prog_uncharge(struct user_struct *user, u32 pages);
538 void bpf_prog_free_id(struct bpf_prog *prog, bool do_idr_lock);
539 void bpf_map_free_id(struct bpf_map *map, bool do_idr_lock);
541 struct bpf_map *bpf_map_get_with_uref(u32 ufd);
542 struct bpf_map *__bpf_map_get(struct fd f);
543 struct bpf_map * __must_check bpf_map_inc(struct bpf_map *map, bool uref);
544 void bpf_map_put_with_uref(struct bpf_map *map);
545 void bpf_map_put(struct bpf_map *map);
546 int bpf_map_precharge_memlock(u32 pages);
547 int bpf_map_charge_memlock(struct bpf_map *map, u32 pages);
548 void bpf_map_uncharge_memlock(struct bpf_map *map, u32 pages);
549 void *bpf_map_area_alloc(size_t size, int numa_node);
550 void bpf_map_area_free(void *base);
551 void bpf_map_init_from_attr(struct bpf_map *map, union bpf_attr *attr);
553 extern int sysctl_unprivileged_bpf_disabled;
555 int bpf_map_new_fd(struct bpf_map *map, int flags);
556 int bpf_prog_new_fd(struct bpf_prog *prog);
558 int bpf_obj_pin_user(u32 ufd, const char __user *pathname);
559 int bpf_obj_get_user(const char __user *pathname, int flags);
561 int bpf_percpu_hash_copy(struct bpf_map *map, void *key, void *value);
562 int bpf_percpu_array_copy(struct bpf_map *map, void *key, void *value);
563 int bpf_percpu_hash_update(struct bpf_map *map, void *key, void *value,
565 int bpf_percpu_array_update(struct bpf_map *map, void *key, void *value,
568 int bpf_stackmap_copy(struct bpf_map *map, void *key, void *value);
570 int bpf_fd_array_map_update_elem(struct bpf_map *map, struct file *map_file,
571 void *key, void *value, u64 map_flags);
572 int bpf_fd_array_map_lookup_elem(struct bpf_map *map, void *key, u32 *value);
573 int bpf_fd_htab_map_update_elem(struct bpf_map *map, struct file *map_file,
574 void *key, void *value, u64 map_flags);
575 int bpf_fd_htab_map_lookup_elem(struct bpf_map *map, void *key, u32 *value);
577 int bpf_get_file_flag(int flags);
578 int bpf_check_uarg_tail_zero(void __user *uaddr, size_t expected_size,
581 /* memcpy that is used with 8-byte aligned pointers, power-of-8 size and
582 * forced to use 'long' read/writes to try to atomically copy long counters.
583 * Best-effort only. No barriers here, since it _will_ race with concurrent
584 * updates from BPF programs. Called from bpf syscall and mostly used with
585 * size 8 or 16 bytes, so ask compiler to inline it.
587 static inline void bpf_long_memcpy(void *dst, const void *src, u32 size)
589 const long *lsrc = src;
592 size /= sizeof(long);
597 /* verify correctness of eBPF program */
598 int bpf_check(struct bpf_prog **fp, union bpf_attr *attr,
599 union bpf_attr __user *uattr);
600 void bpf_patch_call_args(struct bpf_insn *insn, u32 stack_depth);
606 struct bpf_dtab_netdev *__dev_map_lookup_elem(struct bpf_map *map, u32 key);
607 void __dev_map_insert_ctx(struct bpf_map *map, u32 index);
608 void __dev_map_flush(struct bpf_map *map);
609 int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp,
610 struct net_device *dev_rx);
611 int dev_map_generic_redirect(struct bpf_dtab_netdev *dst, struct sk_buff *skb,
612 struct bpf_prog *xdp_prog);
614 struct bpf_cpu_map_entry *__cpu_map_lookup_elem(struct bpf_map *map, u32 key);
615 void __cpu_map_insert_ctx(struct bpf_map *map, u32 index);
616 void __cpu_map_flush(struct bpf_map *map);
617 int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu, struct xdp_buff *xdp,
618 struct net_device *dev_rx);
620 /* Return map's numa specified by userspace */
621 static inline int bpf_map_attr_numa_node(const union bpf_attr *attr)
623 return (attr->map_flags & BPF_F_NUMA_NODE) ?
624 attr->numa_node : NUMA_NO_NODE;
627 struct bpf_prog *bpf_prog_get_type_path(const char *name, enum bpf_prog_type type);
628 int array_map_alloc_check(union bpf_attr *attr);
630 #else /* !CONFIG_BPF_SYSCALL */
631 static inline struct bpf_prog *bpf_prog_get(u32 ufd)
633 return ERR_PTR(-EOPNOTSUPP);
636 static inline struct bpf_prog *bpf_prog_get_type_dev(u32 ufd,
637 enum bpf_prog_type type,
640 return ERR_PTR(-EOPNOTSUPP);
643 static inline struct bpf_prog * __must_check bpf_prog_add(struct bpf_prog *prog,
646 return ERR_PTR(-EOPNOTSUPP);
649 static inline void bpf_prog_sub(struct bpf_prog *prog, int i)
653 static inline void bpf_prog_put(struct bpf_prog *prog)
657 static inline struct bpf_prog * __must_check bpf_prog_inc(struct bpf_prog *prog)
659 return ERR_PTR(-EOPNOTSUPP);
662 static inline struct bpf_prog *__must_check
663 bpf_prog_inc_not_zero(struct bpf_prog *prog)
665 return ERR_PTR(-EOPNOTSUPP);
668 static inline int __bpf_prog_charge(struct user_struct *user, u32 pages)
673 static inline void __bpf_prog_uncharge(struct user_struct *user, u32 pages)
677 static inline int bpf_obj_get_user(const char __user *pathname, int flags)
682 static inline struct net_device *__dev_map_lookup_elem(struct bpf_map *map,
688 static inline void __dev_map_insert_ctx(struct bpf_map *map, u32 index)
692 static inline void __dev_map_flush(struct bpf_map *map)
697 struct bpf_dtab_netdev;
700 int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp,
701 struct net_device *dev_rx)
708 static inline int dev_map_generic_redirect(struct bpf_dtab_netdev *dst,
710 struct bpf_prog *xdp_prog)
716 struct bpf_cpu_map_entry *__cpu_map_lookup_elem(struct bpf_map *map, u32 key)
721 static inline void __cpu_map_insert_ctx(struct bpf_map *map, u32 index)
725 static inline void __cpu_map_flush(struct bpf_map *map)
729 static inline int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu,
730 struct xdp_buff *xdp,
731 struct net_device *dev_rx)
736 static inline struct bpf_prog *bpf_prog_get_type_path(const char *name,
737 enum bpf_prog_type type)
739 return ERR_PTR(-EOPNOTSUPP);
741 #endif /* CONFIG_BPF_SYSCALL */
743 static inline struct bpf_prog *bpf_prog_get_type(u32 ufd,
744 enum bpf_prog_type type)
746 return bpf_prog_get_type_dev(ufd, type, false);
749 bool bpf_prog_get_ok(struct bpf_prog *, enum bpf_prog_type *, bool);
751 int bpf_prog_offload_compile(struct bpf_prog *prog);
752 void bpf_prog_offload_destroy(struct bpf_prog *prog);
753 int bpf_prog_offload_info_fill(struct bpf_prog_info *info,
754 struct bpf_prog *prog);
756 int bpf_map_offload_info_fill(struct bpf_map_info *info, struct bpf_map *map);
758 int bpf_map_offload_lookup_elem(struct bpf_map *map, void *key, void *value);
759 int bpf_map_offload_update_elem(struct bpf_map *map,
760 void *key, void *value, u64 flags);
761 int bpf_map_offload_delete_elem(struct bpf_map *map, void *key);
762 int bpf_map_offload_get_next_key(struct bpf_map *map,
763 void *key, void *next_key);
765 bool bpf_offload_prog_map_match(struct bpf_prog *prog, struct bpf_map *map);
767 struct bpf_offload_dev *
768 bpf_offload_dev_create(const struct bpf_prog_offload_ops *ops);
769 void bpf_offload_dev_destroy(struct bpf_offload_dev *offdev);
770 int bpf_offload_dev_netdev_register(struct bpf_offload_dev *offdev,
771 struct net_device *netdev);
772 void bpf_offload_dev_netdev_unregister(struct bpf_offload_dev *offdev,
773 struct net_device *netdev);
774 bool bpf_offload_dev_match(struct bpf_prog *prog, struct net_device *netdev);
776 #if defined(CONFIG_NET) && defined(CONFIG_BPF_SYSCALL)
777 int bpf_prog_offload_init(struct bpf_prog *prog, union bpf_attr *attr);
779 static inline bool bpf_prog_is_dev_bound(const struct bpf_prog_aux *aux)
781 return aux->offload_requested;
784 static inline bool bpf_map_is_dev_bound(struct bpf_map *map)
786 return unlikely(map->ops == &bpf_map_offload_ops);
789 struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr);
790 void bpf_map_offload_map_free(struct bpf_map *map);
792 static inline int bpf_prog_offload_init(struct bpf_prog *prog,
793 union bpf_attr *attr)
798 static inline bool bpf_prog_is_dev_bound(struct bpf_prog_aux *aux)
803 static inline bool bpf_map_is_dev_bound(struct bpf_map *map)
808 static inline struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr)
810 return ERR_PTR(-EOPNOTSUPP);
813 static inline void bpf_map_offload_map_free(struct bpf_map *map)
816 #endif /* CONFIG_NET && CONFIG_BPF_SYSCALL */
818 #if defined(CONFIG_BPF_STREAM_PARSER)
819 int sock_map_prog_update(struct bpf_map *map, struct bpf_prog *prog, u32 which);
820 int sock_map_get_from_fd(const union bpf_attr *attr, struct bpf_prog *prog);
822 static inline int sock_map_prog_update(struct bpf_map *map,
823 struct bpf_prog *prog, u32 which)
828 static inline int sock_map_get_from_fd(const union bpf_attr *attr,
829 struct bpf_prog *prog)
835 #if defined(CONFIG_XDP_SOCKETS)
837 struct xdp_sock *__xsk_map_lookup_elem(struct bpf_map *map, u32 key);
838 int __xsk_map_redirect(struct bpf_map *map, struct xdp_buff *xdp,
839 struct xdp_sock *xs);
840 void __xsk_map_flush(struct bpf_map *map);
843 static inline struct xdp_sock *__xsk_map_lookup_elem(struct bpf_map *map,
849 static inline int __xsk_map_redirect(struct bpf_map *map, struct xdp_buff *xdp,
855 static inline void __xsk_map_flush(struct bpf_map *map)
860 #if defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL)
861 void bpf_sk_reuseport_detach(struct sock *sk);
862 int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map, void *key,
864 int bpf_fd_reuseport_array_update_elem(struct bpf_map *map, void *key,
865 void *value, u64 map_flags);
867 static inline void bpf_sk_reuseport_detach(struct sock *sk)
871 #ifdef CONFIG_BPF_SYSCALL
872 static inline int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map,
873 void *key, void *value)
878 static inline int bpf_fd_reuseport_array_update_elem(struct bpf_map *map,
879 void *key, void *value,
884 #endif /* CONFIG_BPF_SYSCALL */
885 #endif /* defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL) */
887 /* verifier prototypes for helper functions called from eBPF programs */
888 extern const struct bpf_func_proto bpf_map_lookup_elem_proto;
889 extern const struct bpf_func_proto bpf_map_update_elem_proto;
890 extern const struct bpf_func_proto bpf_map_delete_elem_proto;
891 extern const struct bpf_func_proto bpf_map_push_elem_proto;
892 extern const struct bpf_func_proto bpf_map_pop_elem_proto;
893 extern const struct bpf_func_proto bpf_map_peek_elem_proto;
895 extern const struct bpf_func_proto bpf_get_prandom_u32_proto;
896 extern const struct bpf_func_proto bpf_get_smp_processor_id_proto;
897 extern const struct bpf_func_proto bpf_get_numa_node_id_proto;
898 extern const struct bpf_func_proto bpf_tail_call_proto;
899 extern const struct bpf_func_proto bpf_ktime_get_ns_proto;
900 extern const struct bpf_func_proto bpf_get_current_pid_tgid_proto;
901 extern const struct bpf_func_proto bpf_get_current_uid_gid_proto;
902 extern const struct bpf_func_proto bpf_get_current_comm_proto;
903 extern const struct bpf_func_proto bpf_get_stackid_proto;
904 extern const struct bpf_func_proto bpf_get_stack_proto;
905 extern const struct bpf_func_proto bpf_sock_map_update_proto;
906 extern const struct bpf_func_proto bpf_sock_hash_update_proto;
907 extern const struct bpf_func_proto bpf_get_current_cgroup_id_proto;
908 extern const struct bpf_func_proto bpf_msg_redirect_hash_proto;
909 extern const struct bpf_func_proto bpf_msg_redirect_map_proto;
910 extern const struct bpf_func_proto bpf_sk_redirect_hash_proto;
911 extern const struct bpf_func_proto bpf_sk_redirect_map_proto;
912 extern const struct bpf_func_proto bpf_spin_lock_proto;
913 extern const struct bpf_func_proto bpf_spin_unlock_proto;
914 extern const struct bpf_func_proto bpf_get_local_storage_proto;
916 /* Shared helpers among cBPF and eBPF. */
917 void bpf_user_rnd_init_once(void);
918 u64 bpf_user_rnd_u32(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
920 #if defined(CONFIG_NET)
921 bool bpf_sock_is_valid_access(int off, int size, enum bpf_access_type type,
922 struct bpf_insn_access_aux *info);
923 u32 bpf_sock_convert_ctx_access(enum bpf_access_type type,
924 const struct bpf_insn *si,
925 struct bpf_insn *insn_buf,
926 struct bpf_prog *prog,
929 static inline bool bpf_sock_is_valid_access(int off, int size,
930 enum bpf_access_type type,
931 struct bpf_insn_access_aux *info)
935 static inline u32 bpf_sock_convert_ctx_access(enum bpf_access_type type,
936 const struct bpf_insn *si,
937 struct bpf_insn *insn_buf,
938 struct bpf_prog *prog,
945 #endif /* _LINUX_BPF_H */