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>
19 #include <linux/u64_stats_sync.h>
21 struct bpf_verifier_env;
30 /* map is generic key/value storage optionally accesible by eBPF programs */
32 /* funcs callable from userspace (via syscall) */
33 int (*map_alloc_check)(union bpf_attr *attr);
34 struct bpf_map *(*map_alloc)(union bpf_attr *attr);
35 void (*map_release)(struct bpf_map *map, struct file *map_file);
36 void (*map_free)(struct bpf_map *map);
37 int (*map_get_next_key)(struct bpf_map *map, void *key, void *next_key);
38 void (*map_release_uref)(struct bpf_map *map);
40 /* funcs callable from userspace and from eBPF programs */
41 void *(*map_lookup_elem)(struct bpf_map *map, void *key);
42 int (*map_update_elem)(struct bpf_map *map, void *key, void *value, u64 flags);
43 int (*map_delete_elem)(struct bpf_map *map, void *key);
44 int (*map_push_elem)(struct bpf_map *map, void *value, u64 flags);
45 int (*map_pop_elem)(struct bpf_map *map, void *value);
46 int (*map_peek_elem)(struct bpf_map *map, void *value);
48 /* funcs called by prog_array and perf_event_array map */
49 void *(*map_fd_get_ptr)(struct bpf_map *map, struct file *map_file,
51 void (*map_fd_put_ptr)(void *ptr);
52 u32 (*map_gen_lookup)(struct bpf_map *map, struct bpf_insn *insn_buf);
53 u32 (*map_fd_sys_lookup_elem)(void *ptr);
54 void (*map_seq_show_elem)(struct bpf_map *map, void *key,
56 int (*map_check_btf)(const struct bpf_map *map,
57 const struct btf *btf,
58 const struct btf_type *key_type,
59 const struct btf_type *value_type);
61 /* Direct value access helpers. */
62 int (*map_direct_value_addr)(const struct bpf_map *map,
64 int (*map_direct_value_meta)(const struct bpf_map *map,
69 /* The first two cachelines with read-mostly members of which some
70 * are also accessed in fast-path (e.g. ops, max_entries).
72 const struct bpf_map_ops *ops ____cacheline_aligned;
73 struct bpf_map *inner_map_meta;
74 #ifdef CONFIG_SECURITY
77 enum bpf_map_type map_type;
82 int spin_lock_off; /* >=0 valid offset, <0 error */
86 u32 btf_value_type_id;
92 /* The 3rd and 4th cacheline with misc members to avoid false sharing
93 * particularly with refcounting.
95 struct user_struct *user ____cacheline_aligned;
98 struct work_struct work;
99 char name[BPF_OBJ_NAME_LEN];
102 static inline bool map_value_has_spin_lock(const struct bpf_map *map)
104 return map->spin_lock_off >= 0;
107 static inline void check_and_init_map_lock(struct bpf_map *map, void *dst)
109 if (likely(!map_value_has_spin_lock(map)))
111 *(struct bpf_spin_lock *)(dst + map->spin_lock_off) =
112 (struct bpf_spin_lock){};
115 /* copy everything but bpf_spin_lock */
116 static inline void copy_map_value(struct bpf_map *map, void *dst, void *src)
118 if (unlikely(map_value_has_spin_lock(map))) {
119 u32 off = map->spin_lock_off;
121 memcpy(dst, src, off);
122 memcpy(dst + off + sizeof(struct bpf_spin_lock),
123 src + off + sizeof(struct bpf_spin_lock),
124 map->value_size - off - sizeof(struct bpf_spin_lock));
126 memcpy(dst, src, map->value_size);
129 void copy_map_value_locked(struct bpf_map *map, void *dst, void *src,
132 struct bpf_offload_dev;
133 struct bpf_offloaded_map;
135 struct bpf_map_dev_ops {
136 int (*map_get_next_key)(struct bpf_offloaded_map *map,
137 void *key, void *next_key);
138 int (*map_lookup_elem)(struct bpf_offloaded_map *map,
139 void *key, void *value);
140 int (*map_update_elem)(struct bpf_offloaded_map *map,
141 void *key, void *value, u64 flags);
142 int (*map_delete_elem)(struct bpf_offloaded_map *map, void *key);
145 struct bpf_offloaded_map {
147 struct net_device *netdev;
148 const struct bpf_map_dev_ops *dev_ops;
150 struct list_head offloads;
153 static inline struct bpf_offloaded_map *map_to_offmap(struct bpf_map *map)
155 return container_of(map, struct bpf_offloaded_map, map);
158 static inline bool bpf_map_offload_neutral(const struct bpf_map *map)
160 return map->map_type == BPF_MAP_TYPE_PERF_EVENT_ARRAY;
163 static inline bool bpf_map_support_seq_show(const struct bpf_map *map)
165 return map->btf && map->ops->map_seq_show_elem;
168 int map_check_no_btf(const struct bpf_map *map,
169 const struct btf *btf,
170 const struct btf_type *key_type,
171 const struct btf_type *value_type);
173 extern const struct bpf_map_ops bpf_map_offload_ops;
175 /* function argument constraints */
177 ARG_DONTCARE = 0, /* unused argument in helper function */
179 /* the following constraints used to prototype
180 * bpf_map_lookup/update/delete_elem() functions
182 ARG_CONST_MAP_PTR, /* const argument used as pointer to bpf_map */
183 ARG_PTR_TO_MAP_KEY, /* pointer to stack used as map key */
184 ARG_PTR_TO_MAP_VALUE, /* pointer to stack used as map value */
185 ARG_PTR_TO_UNINIT_MAP_VALUE, /* pointer to valid memory used to store a map value */
187 /* the following constraints used to prototype bpf_memcmp() and other
188 * functions that access data on eBPF program stack
190 ARG_PTR_TO_MEM, /* pointer to valid memory (stack, packet, map value) */
191 ARG_PTR_TO_MEM_OR_NULL, /* pointer to valid memory or NULL */
192 ARG_PTR_TO_UNINIT_MEM, /* pointer to memory does not need to be initialized,
193 * helper function must fill all bytes or clear
194 * them in error case.
197 ARG_CONST_SIZE, /* number of bytes accessed from memory */
198 ARG_CONST_SIZE_OR_ZERO, /* number of bytes accessed from memory or 0 */
200 ARG_PTR_TO_CTX, /* pointer to context */
201 ARG_ANYTHING, /* any (initialized) argument is ok */
202 ARG_PTR_TO_SPIN_LOCK, /* pointer to bpf_spin_lock */
203 ARG_PTR_TO_SOCK_COMMON, /* pointer to sock_common */
206 /* type of values returned from helper functions */
207 enum bpf_return_type {
208 RET_INTEGER, /* function returns integer */
209 RET_VOID, /* function doesn't return anything */
210 RET_PTR_TO_MAP_VALUE, /* returns a pointer to map elem value */
211 RET_PTR_TO_MAP_VALUE_OR_NULL, /* returns a pointer to map elem value or NULL */
212 RET_PTR_TO_SOCKET_OR_NULL, /* returns a pointer to a socket or NULL */
213 RET_PTR_TO_TCP_SOCK_OR_NULL, /* returns a pointer to a tcp_sock or NULL */
214 RET_PTR_TO_SOCK_COMMON_OR_NULL, /* returns a pointer to a sock_common or NULL */
217 /* eBPF function prototype used by verifier to allow BPF_CALLs from eBPF programs
218 * to in-kernel helper functions and for adjusting imm32 field in BPF_CALL
219 * instructions after verifying
221 struct bpf_func_proto {
222 u64 (*func)(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
225 enum bpf_return_type ret_type;
226 enum bpf_arg_type arg1_type;
227 enum bpf_arg_type arg2_type;
228 enum bpf_arg_type arg3_type;
229 enum bpf_arg_type arg4_type;
230 enum bpf_arg_type arg5_type;
233 /* bpf_context is intentionally undefined structure. Pointer to bpf_context is
234 * the first argument to eBPF programs.
235 * For socket filters: 'struct bpf_context *' == 'struct sk_buff *'
239 enum bpf_access_type {
244 /* types of values stored in eBPF registers */
245 /* Pointer types represent:
248 * pointer + (u16) var
249 * pointer + (u16) var + imm
250 * if (range > 0) then [ptr, ptr + range - off) is safe to access
251 * if (id > 0) means that some 'var' was added
252 * if (off > 0) means that 'imm' was added
255 NOT_INIT = 0, /* nothing was written into register */
256 SCALAR_VALUE, /* reg doesn't contain a valid pointer */
257 PTR_TO_CTX, /* reg points to bpf_context */
258 CONST_PTR_TO_MAP, /* reg points to struct bpf_map */
259 PTR_TO_MAP_VALUE, /* reg points to map element value */
260 PTR_TO_MAP_VALUE_OR_NULL,/* points to map elem value or NULL */
261 PTR_TO_STACK, /* reg == frame_pointer + offset */
262 PTR_TO_PACKET_META, /* skb->data - meta_len */
263 PTR_TO_PACKET, /* reg points to skb->data */
264 PTR_TO_PACKET_END, /* skb->data + headlen */
265 PTR_TO_FLOW_KEYS, /* reg points to bpf_flow_keys */
266 PTR_TO_SOCKET, /* reg points to struct bpf_sock */
267 PTR_TO_SOCKET_OR_NULL, /* reg points to struct bpf_sock or NULL */
268 PTR_TO_SOCK_COMMON, /* reg points to sock_common */
269 PTR_TO_SOCK_COMMON_OR_NULL, /* reg points to sock_common or NULL */
270 PTR_TO_TCP_SOCK, /* reg points to struct tcp_sock */
271 PTR_TO_TCP_SOCK_OR_NULL, /* reg points to struct tcp_sock or NULL */
274 /* The information passed from prog-specific *_is_valid_access
275 * back to the verifier.
277 struct bpf_insn_access_aux {
278 enum bpf_reg_type reg_type;
283 bpf_ctx_record_field_size(struct bpf_insn_access_aux *aux, u32 size)
285 aux->ctx_field_size = size;
288 struct bpf_prog_ops {
289 int (*test_run)(struct bpf_prog *prog, const union bpf_attr *kattr,
290 union bpf_attr __user *uattr);
293 struct bpf_verifier_ops {
294 /* return eBPF function prototype for verification */
295 const struct bpf_func_proto *
296 (*get_func_proto)(enum bpf_func_id func_id,
297 const struct bpf_prog *prog);
299 /* return true if 'size' wide access at offset 'off' within bpf_context
300 * with 'type' (read or write) is allowed
302 bool (*is_valid_access)(int off, int size, enum bpf_access_type type,
303 const struct bpf_prog *prog,
304 struct bpf_insn_access_aux *info);
305 int (*gen_prologue)(struct bpf_insn *insn, bool direct_write,
306 const struct bpf_prog *prog);
307 int (*gen_ld_abs)(const struct bpf_insn *orig,
308 struct bpf_insn *insn_buf);
309 u32 (*convert_ctx_access)(enum bpf_access_type type,
310 const struct bpf_insn *src,
311 struct bpf_insn *dst,
312 struct bpf_prog *prog, u32 *target_size);
315 struct bpf_prog_offload_ops {
316 /* verifier basic callbacks */
317 int (*insn_hook)(struct bpf_verifier_env *env,
318 int insn_idx, int prev_insn_idx);
319 int (*finalize)(struct bpf_verifier_env *env);
320 /* verifier optimization callbacks (called after .finalize) */
321 int (*replace_insn)(struct bpf_verifier_env *env, u32 off,
322 struct bpf_insn *insn);
323 int (*remove_insns)(struct bpf_verifier_env *env, u32 off, u32 cnt);
324 /* program management callbacks */
325 int (*prepare)(struct bpf_prog *prog);
326 int (*translate)(struct bpf_prog *prog);
327 void (*destroy)(struct bpf_prog *prog);
330 struct bpf_prog_offload {
331 struct bpf_prog *prog;
332 struct net_device *netdev;
333 struct bpf_offload_dev *offdev;
335 struct list_head offloads;
342 enum bpf_cgroup_storage_type {
343 BPF_CGROUP_STORAGE_SHARED,
344 BPF_CGROUP_STORAGE_PERCPU,
345 __BPF_CGROUP_STORAGE_MAX
348 #define MAX_BPF_CGROUP_STORAGE_TYPE __BPF_CGROUP_STORAGE_MAX
350 struct bpf_prog_stats {
353 struct u64_stats_sync syncp;
356 struct bpf_prog_aux {
363 u32 func_cnt; /* used by non-func prog as the number of func progs */
364 u32 func_idx; /* 0 for non-func prog, the index in func array for func prog */
365 bool offload_requested;
366 struct bpf_prog **func;
367 void *jit_data; /* JIT specific data. arch dependent */
368 struct latch_tree_node ksym_tnode;
369 struct list_head ksym_lnode;
370 const struct bpf_prog_ops *ops;
371 struct bpf_map **used_maps;
372 struct bpf_prog *prog;
373 struct user_struct *user;
374 u64 load_time; /* ns since boottime */
375 struct bpf_map *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE];
376 char name[BPF_OBJ_NAME_LEN];
377 #ifdef CONFIG_SECURITY
380 struct bpf_prog_offload *offload;
382 struct bpf_func_info *func_info;
383 /* bpf_line_info loaded from userspace. linfo->insn_off
384 * has the xlated insn offset.
385 * Both the main and sub prog share the same linfo.
386 * The subprog can access its first linfo by
387 * using the linfo_idx.
389 struct bpf_line_info *linfo;
390 /* jited_linfo is the jited addr of the linfo. It has a
391 * one to one mapping to linfo:
392 * jited_linfo[i] is the jited addr for the linfo[i]->insn_off.
393 * Both the main and sub prog share the same jited_linfo.
394 * The subprog can access its first jited_linfo by
395 * using the linfo_idx.
400 /* subprog can use linfo_idx to access its first linfo and
402 * main prog always has linfo_idx == 0
405 struct bpf_prog_stats __percpu *stats;
407 struct work_struct work;
416 /* 'ownership' of prog_array is claimed by the first program that
417 * is going to use this map or by the first program which FD is stored
418 * in the map to make sure that all callers and callees have the same
419 * prog_type and JITed flag
421 enum bpf_prog_type owner_prog_type;
424 char value[0] __aligned(8);
425 void *ptrs[0] __aligned(8);
426 void __percpu *pptrs[0] __aligned(8);
430 #define BPF_COMPLEXITY_LIMIT_INSNS 1000000 /* yes. 1M insns */
431 #define MAX_TAIL_CALL_CNT 32
433 #define BPF_F_ACCESS_MASK (BPF_F_RDONLY | \
434 BPF_F_RDONLY_PROG | \
438 #define BPF_MAP_CAN_READ BIT(0)
439 #define BPF_MAP_CAN_WRITE BIT(1)
441 static inline u32 bpf_map_flags_to_cap(struct bpf_map *map)
443 u32 access_flags = map->map_flags & (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG);
445 /* Combination of BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG is
448 if (access_flags & BPF_F_RDONLY_PROG)
449 return BPF_MAP_CAN_READ;
450 else if (access_flags & BPF_F_WRONLY_PROG)
451 return BPF_MAP_CAN_WRITE;
453 return BPF_MAP_CAN_READ | BPF_MAP_CAN_WRITE;
456 static inline bool bpf_map_flags_access_ok(u32 access_flags)
458 return (access_flags & (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG)) !=
459 (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG);
462 struct bpf_event_entry {
463 struct perf_event *event;
464 struct file *perf_file;
465 struct file *map_file;
469 bool bpf_prog_array_compatible(struct bpf_array *array, const struct bpf_prog *fp);
470 int bpf_prog_calc_tag(struct bpf_prog *fp);
472 const struct bpf_func_proto *bpf_get_trace_printk_proto(void);
474 typedef unsigned long (*bpf_ctx_copy_t)(void *dst, const void *src,
475 unsigned long off, unsigned long len);
476 typedef u32 (*bpf_convert_ctx_access_t)(enum bpf_access_type type,
477 const struct bpf_insn *src,
478 struct bpf_insn *dst,
479 struct bpf_prog *prog,
482 u64 bpf_event_output(struct bpf_map *map, u64 flags, void *meta, u64 meta_size,
483 void *ctx, u64 ctx_size, bpf_ctx_copy_t ctx_copy);
485 int bpf_prog_test_run_xdp(struct bpf_prog *prog, const union bpf_attr *kattr,
486 union bpf_attr __user *uattr);
487 int bpf_prog_test_run_skb(struct bpf_prog *prog, const union bpf_attr *kattr,
488 union bpf_attr __user *uattr);
489 int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog,
490 const union bpf_attr *kattr,
491 union bpf_attr __user *uattr);
493 /* an array of programs to be executed under rcu_lock.
496 * ret = BPF_PROG_RUN_ARRAY(&bpf_prog_array, ctx, BPF_PROG_RUN);
498 * the structure returned by bpf_prog_array_alloc() should be populated
499 * with program pointers and the last pointer must be NULL.
500 * The user has to keep refcnt on the program and make sure the program
501 * is removed from the array before bpf_prog_put().
502 * The 'struct bpf_prog_array *' should only be replaced with xchg()
503 * since other cpus are walking the array of pointers in parallel.
505 struct bpf_prog_array_item {
506 struct bpf_prog *prog;
507 struct bpf_cgroup_storage *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE];
510 struct bpf_prog_array {
512 struct bpf_prog_array_item items[0];
515 struct bpf_prog_array *bpf_prog_array_alloc(u32 prog_cnt, gfp_t flags);
516 void bpf_prog_array_free(struct bpf_prog_array __rcu *progs);
517 int bpf_prog_array_length(struct bpf_prog_array __rcu *progs);
518 int bpf_prog_array_copy_to_user(struct bpf_prog_array __rcu *progs,
519 __u32 __user *prog_ids, u32 cnt);
521 void bpf_prog_array_delete_safe(struct bpf_prog_array __rcu *progs,
522 struct bpf_prog *old_prog);
523 int bpf_prog_array_copy_info(struct bpf_prog_array __rcu *array,
524 u32 *prog_ids, u32 request_cnt,
526 int bpf_prog_array_copy(struct bpf_prog_array __rcu *old_array,
527 struct bpf_prog *exclude_prog,
528 struct bpf_prog *include_prog,
529 struct bpf_prog_array **new_array);
531 #define __BPF_PROG_RUN_ARRAY(array, ctx, func, check_non_null) \
533 struct bpf_prog_array_item *_item; \
534 struct bpf_prog *_prog; \
535 struct bpf_prog_array *_array; \
539 _array = rcu_dereference(array); \
540 if (unlikely(check_non_null && !_array))\
542 _item = &_array->items[0]; \
543 while ((_prog = READ_ONCE(_item->prog))) { \
544 bpf_cgroup_storage_set(_item->cgroup_storage); \
545 _ret &= func(_prog, ctx); \
550 preempt_enable_no_resched(); \
554 #define BPF_PROG_RUN_ARRAY(array, ctx, func) \
555 __BPF_PROG_RUN_ARRAY(array, ctx, func, false)
557 #define BPF_PROG_RUN_ARRAY_CHECK(array, ctx, func) \
558 __BPF_PROG_RUN_ARRAY(array, ctx, func, true)
560 #ifdef CONFIG_BPF_SYSCALL
561 DECLARE_PER_CPU(int, bpf_prog_active);
563 extern const struct file_operations bpf_map_fops;
564 extern const struct file_operations bpf_prog_fops;
566 #define BPF_PROG_TYPE(_id, _name) \
567 extern const struct bpf_prog_ops _name ## _prog_ops; \
568 extern const struct bpf_verifier_ops _name ## _verifier_ops;
569 #define BPF_MAP_TYPE(_id, _ops) \
570 extern const struct bpf_map_ops _ops;
571 #include <linux/bpf_types.h>
575 extern const struct bpf_prog_ops bpf_offload_prog_ops;
576 extern const struct bpf_verifier_ops tc_cls_act_analyzer_ops;
577 extern const struct bpf_verifier_ops xdp_analyzer_ops;
579 struct bpf_prog *bpf_prog_get(u32 ufd);
580 struct bpf_prog *bpf_prog_get_type_dev(u32 ufd, enum bpf_prog_type type,
582 struct bpf_prog * __must_check bpf_prog_add(struct bpf_prog *prog, int i);
583 void bpf_prog_sub(struct bpf_prog *prog, int i);
584 struct bpf_prog * __must_check bpf_prog_inc(struct bpf_prog *prog);
585 struct bpf_prog * __must_check bpf_prog_inc_not_zero(struct bpf_prog *prog);
586 void bpf_prog_put(struct bpf_prog *prog);
587 int __bpf_prog_charge(struct user_struct *user, u32 pages);
588 void __bpf_prog_uncharge(struct user_struct *user, u32 pages);
590 void bpf_prog_free_id(struct bpf_prog *prog, bool do_idr_lock);
591 void bpf_map_free_id(struct bpf_map *map, bool do_idr_lock);
593 struct bpf_map *bpf_map_get_with_uref(u32 ufd);
594 struct bpf_map *__bpf_map_get(struct fd f);
595 struct bpf_map * __must_check bpf_map_inc(struct bpf_map *map, bool uref);
596 void bpf_map_put_with_uref(struct bpf_map *map);
597 void bpf_map_put(struct bpf_map *map);
598 int bpf_map_precharge_memlock(u32 pages);
599 int bpf_map_charge_memlock(struct bpf_map *map, u32 pages);
600 void bpf_map_uncharge_memlock(struct bpf_map *map, u32 pages);
601 void *bpf_map_area_alloc(size_t size, int numa_node);
602 void bpf_map_area_free(void *base);
603 void bpf_map_init_from_attr(struct bpf_map *map, union bpf_attr *attr);
605 extern int sysctl_unprivileged_bpf_disabled;
606 extern int sysctl_bpf_stats_enabled;
608 int bpf_map_new_fd(struct bpf_map *map, int flags);
609 int bpf_prog_new_fd(struct bpf_prog *prog);
611 int bpf_obj_pin_user(u32 ufd, const char __user *pathname);
612 int bpf_obj_get_user(const char __user *pathname, int flags);
614 int bpf_percpu_hash_copy(struct bpf_map *map, void *key, void *value);
615 int bpf_percpu_array_copy(struct bpf_map *map, void *key, void *value);
616 int bpf_percpu_hash_update(struct bpf_map *map, void *key, void *value,
618 int bpf_percpu_array_update(struct bpf_map *map, void *key, void *value,
621 int bpf_stackmap_copy(struct bpf_map *map, void *key, void *value);
623 int bpf_fd_array_map_update_elem(struct bpf_map *map, struct file *map_file,
624 void *key, void *value, u64 map_flags);
625 int bpf_fd_array_map_lookup_elem(struct bpf_map *map, void *key, u32 *value);
626 int bpf_fd_htab_map_update_elem(struct bpf_map *map, struct file *map_file,
627 void *key, void *value, u64 map_flags);
628 int bpf_fd_htab_map_lookup_elem(struct bpf_map *map, void *key, u32 *value);
630 int bpf_get_file_flag(int flags);
631 int bpf_check_uarg_tail_zero(void __user *uaddr, size_t expected_size,
634 /* memcpy that is used with 8-byte aligned pointers, power-of-8 size and
635 * forced to use 'long' read/writes to try to atomically copy long counters.
636 * Best-effort only. No barriers here, since it _will_ race with concurrent
637 * updates from BPF programs. Called from bpf syscall and mostly used with
638 * size 8 or 16 bytes, so ask compiler to inline it.
640 static inline void bpf_long_memcpy(void *dst, const void *src, u32 size)
642 const long *lsrc = src;
645 size /= sizeof(long);
650 /* verify correctness of eBPF program */
651 int bpf_check(struct bpf_prog **fp, union bpf_attr *attr,
652 union bpf_attr __user *uattr);
653 void bpf_patch_call_args(struct bpf_insn *insn, u32 stack_depth);
659 struct bpf_dtab_netdev *__dev_map_lookup_elem(struct bpf_map *map, u32 key);
660 void __dev_map_insert_ctx(struct bpf_map *map, u32 index);
661 void __dev_map_flush(struct bpf_map *map);
662 int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp,
663 struct net_device *dev_rx);
664 int dev_map_generic_redirect(struct bpf_dtab_netdev *dst, struct sk_buff *skb,
665 struct bpf_prog *xdp_prog);
667 struct bpf_cpu_map_entry *__cpu_map_lookup_elem(struct bpf_map *map, u32 key);
668 void __cpu_map_insert_ctx(struct bpf_map *map, u32 index);
669 void __cpu_map_flush(struct bpf_map *map);
670 int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu, struct xdp_buff *xdp,
671 struct net_device *dev_rx);
673 /* Return map's numa specified by userspace */
674 static inline int bpf_map_attr_numa_node(const union bpf_attr *attr)
676 return (attr->map_flags & BPF_F_NUMA_NODE) ?
677 attr->numa_node : NUMA_NO_NODE;
680 struct bpf_prog *bpf_prog_get_type_path(const char *name, enum bpf_prog_type type);
681 int array_map_alloc_check(union bpf_attr *attr);
683 #else /* !CONFIG_BPF_SYSCALL */
684 static inline struct bpf_prog *bpf_prog_get(u32 ufd)
686 return ERR_PTR(-EOPNOTSUPP);
689 static inline struct bpf_prog *bpf_prog_get_type_dev(u32 ufd,
690 enum bpf_prog_type type,
693 return ERR_PTR(-EOPNOTSUPP);
696 static inline struct bpf_prog * __must_check bpf_prog_add(struct bpf_prog *prog,
699 return ERR_PTR(-EOPNOTSUPP);
702 static inline void bpf_prog_sub(struct bpf_prog *prog, int i)
706 static inline void bpf_prog_put(struct bpf_prog *prog)
710 static inline struct bpf_prog * __must_check bpf_prog_inc(struct bpf_prog *prog)
712 return ERR_PTR(-EOPNOTSUPP);
715 static inline struct bpf_prog *__must_check
716 bpf_prog_inc_not_zero(struct bpf_prog *prog)
718 return ERR_PTR(-EOPNOTSUPP);
721 static inline int __bpf_prog_charge(struct user_struct *user, u32 pages)
726 static inline void __bpf_prog_uncharge(struct user_struct *user, u32 pages)
730 static inline int bpf_obj_get_user(const char __user *pathname, int flags)
735 static inline struct net_device *__dev_map_lookup_elem(struct bpf_map *map,
741 static inline void __dev_map_insert_ctx(struct bpf_map *map, u32 index)
745 static inline void __dev_map_flush(struct bpf_map *map)
750 struct bpf_dtab_netdev;
753 int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp,
754 struct net_device *dev_rx)
761 static inline int dev_map_generic_redirect(struct bpf_dtab_netdev *dst,
763 struct bpf_prog *xdp_prog)
769 struct bpf_cpu_map_entry *__cpu_map_lookup_elem(struct bpf_map *map, u32 key)
774 static inline void __cpu_map_insert_ctx(struct bpf_map *map, u32 index)
778 static inline void __cpu_map_flush(struct bpf_map *map)
782 static inline int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu,
783 struct xdp_buff *xdp,
784 struct net_device *dev_rx)
789 static inline struct bpf_prog *bpf_prog_get_type_path(const char *name,
790 enum bpf_prog_type type)
792 return ERR_PTR(-EOPNOTSUPP);
794 #endif /* CONFIG_BPF_SYSCALL */
796 static inline struct bpf_prog *bpf_prog_get_type(u32 ufd,
797 enum bpf_prog_type type)
799 return bpf_prog_get_type_dev(ufd, type, false);
802 bool bpf_prog_get_ok(struct bpf_prog *, enum bpf_prog_type *, bool);
804 int bpf_prog_offload_compile(struct bpf_prog *prog);
805 void bpf_prog_offload_destroy(struct bpf_prog *prog);
806 int bpf_prog_offload_info_fill(struct bpf_prog_info *info,
807 struct bpf_prog *prog);
809 int bpf_map_offload_info_fill(struct bpf_map_info *info, struct bpf_map *map);
811 int bpf_map_offload_lookup_elem(struct bpf_map *map, void *key, void *value);
812 int bpf_map_offload_update_elem(struct bpf_map *map,
813 void *key, void *value, u64 flags);
814 int bpf_map_offload_delete_elem(struct bpf_map *map, void *key);
815 int bpf_map_offload_get_next_key(struct bpf_map *map,
816 void *key, void *next_key);
818 bool bpf_offload_prog_map_match(struct bpf_prog *prog, struct bpf_map *map);
820 struct bpf_offload_dev *
821 bpf_offload_dev_create(const struct bpf_prog_offload_ops *ops, void *priv);
822 void bpf_offload_dev_destroy(struct bpf_offload_dev *offdev);
823 void *bpf_offload_dev_priv(struct bpf_offload_dev *offdev);
824 int bpf_offload_dev_netdev_register(struct bpf_offload_dev *offdev,
825 struct net_device *netdev);
826 void bpf_offload_dev_netdev_unregister(struct bpf_offload_dev *offdev,
827 struct net_device *netdev);
828 bool bpf_offload_dev_match(struct bpf_prog *prog, struct net_device *netdev);
830 #if defined(CONFIG_NET) && defined(CONFIG_BPF_SYSCALL)
831 int bpf_prog_offload_init(struct bpf_prog *prog, union bpf_attr *attr);
833 static inline bool bpf_prog_is_dev_bound(const struct bpf_prog_aux *aux)
835 return aux->offload_requested;
838 static inline bool bpf_map_is_dev_bound(struct bpf_map *map)
840 return unlikely(map->ops == &bpf_map_offload_ops);
843 struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr);
844 void bpf_map_offload_map_free(struct bpf_map *map);
846 static inline int bpf_prog_offload_init(struct bpf_prog *prog,
847 union bpf_attr *attr)
852 static inline bool bpf_prog_is_dev_bound(struct bpf_prog_aux *aux)
857 static inline bool bpf_map_is_dev_bound(struct bpf_map *map)
862 static inline struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr)
864 return ERR_PTR(-EOPNOTSUPP);
867 static inline void bpf_map_offload_map_free(struct bpf_map *map)
870 #endif /* CONFIG_NET && CONFIG_BPF_SYSCALL */
872 #if defined(CONFIG_BPF_STREAM_PARSER)
873 int sock_map_prog_update(struct bpf_map *map, struct bpf_prog *prog, u32 which);
874 int sock_map_get_from_fd(const union bpf_attr *attr, struct bpf_prog *prog);
876 static inline int sock_map_prog_update(struct bpf_map *map,
877 struct bpf_prog *prog, u32 which)
882 static inline int sock_map_get_from_fd(const union bpf_attr *attr,
883 struct bpf_prog *prog)
889 #if defined(CONFIG_XDP_SOCKETS)
891 struct xdp_sock *__xsk_map_lookup_elem(struct bpf_map *map, u32 key);
892 int __xsk_map_redirect(struct bpf_map *map, struct xdp_buff *xdp,
893 struct xdp_sock *xs);
894 void __xsk_map_flush(struct bpf_map *map);
897 static inline struct xdp_sock *__xsk_map_lookup_elem(struct bpf_map *map,
903 static inline int __xsk_map_redirect(struct bpf_map *map, struct xdp_buff *xdp,
909 static inline void __xsk_map_flush(struct bpf_map *map)
914 #if defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL)
915 void bpf_sk_reuseport_detach(struct sock *sk);
916 int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map, void *key,
918 int bpf_fd_reuseport_array_update_elem(struct bpf_map *map, void *key,
919 void *value, u64 map_flags);
921 static inline void bpf_sk_reuseport_detach(struct sock *sk)
925 #ifdef CONFIG_BPF_SYSCALL
926 static inline int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map,
927 void *key, void *value)
932 static inline int bpf_fd_reuseport_array_update_elem(struct bpf_map *map,
933 void *key, void *value,
938 #endif /* CONFIG_BPF_SYSCALL */
939 #endif /* defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL) */
941 /* verifier prototypes for helper functions called from eBPF programs */
942 extern const struct bpf_func_proto bpf_map_lookup_elem_proto;
943 extern const struct bpf_func_proto bpf_map_update_elem_proto;
944 extern const struct bpf_func_proto bpf_map_delete_elem_proto;
945 extern const struct bpf_func_proto bpf_map_push_elem_proto;
946 extern const struct bpf_func_proto bpf_map_pop_elem_proto;
947 extern const struct bpf_func_proto bpf_map_peek_elem_proto;
949 extern const struct bpf_func_proto bpf_get_prandom_u32_proto;
950 extern const struct bpf_func_proto bpf_get_smp_processor_id_proto;
951 extern const struct bpf_func_proto bpf_get_numa_node_id_proto;
952 extern const struct bpf_func_proto bpf_tail_call_proto;
953 extern const struct bpf_func_proto bpf_ktime_get_ns_proto;
954 extern const struct bpf_func_proto bpf_get_current_pid_tgid_proto;
955 extern const struct bpf_func_proto bpf_get_current_uid_gid_proto;
956 extern const struct bpf_func_proto bpf_get_current_comm_proto;
957 extern const struct bpf_func_proto bpf_get_stackid_proto;
958 extern const struct bpf_func_proto bpf_get_stack_proto;
959 extern const struct bpf_func_proto bpf_sock_map_update_proto;
960 extern const struct bpf_func_proto bpf_sock_hash_update_proto;
961 extern const struct bpf_func_proto bpf_get_current_cgroup_id_proto;
962 extern const struct bpf_func_proto bpf_msg_redirect_hash_proto;
963 extern const struct bpf_func_proto bpf_msg_redirect_map_proto;
964 extern const struct bpf_func_proto bpf_sk_redirect_hash_proto;
965 extern const struct bpf_func_proto bpf_sk_redirect_map_proto;
966 extern const struct bpf_func_proto bpf_spin_lock_proto;
967 extern const struct bpf_func_proto bpf_spin_unlock_proto;
968 extern const struct bpf_func_proto bpf_get_local_storage_proto;
970 /* Shared helpers among cBPF and eBPF. */
971 void bpf_user_rnd_init_once(void);
972 u64 bpf_user_rnd_u32(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
974 #if defined(CONFIG_NET)
975 bool bpf_sock_common_is_valid_access(int off, int size,
976 enum bpf_access_type type,
977 struct bpf_insn_access_aux *info);
978 bool bpf_sock_is_valid_access(int off, int size, enum bpf_access_type type,
979 struct bpf_insn_access_aux *info);
980 u32 bpf_sock_convert_ctx_access(enum bpf_access_type type,
981 const struct bpf_insn *si,
982 struct bpf_insn *insn_buf,
983 struct bpf_prog *prog,
986 static inline bool bpf_sock_common_is_valid_access(int off, int size,
987 enum bpf_access_type type,
988 struct bpf_insn_access_aux *info)
992 static inline bool bpf_sock_is_valid_access(int off, int size,
993 enum bpf_access_type type,
994 struct bpf_insn_access_aux *info)
998 static inline u32 bpf_sock_convert_ctx_access(enum bpf_access_type type,
999 const struct bpf_insn *si,
1000 struct bpf_insn *insn_buf,
1001 struct bpf_prog *prog,
1009 bool bpf_tcp_sock_is_valid_access(int off, int size, enum bpf_access_type type,
1010 struct bpf_insn_access_aux *info);
1012 u32 bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type,
1013 const struct bpf_insn *si,
1014 struct bpf_insn *insn_buf,
1015 struct bpf_prog *prog,
1018 static inline bool bpf_tcp_sock_is_valid_access(int off, int size,
1019 enum bpf_access_type type,
1020 struct bpf_insn_access_aux *info)
1025 static inline u32 bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type,
1026 const struct bpf_insn *si,
1027 struct bpf_insn *insn_buf,
1028 struct bpf_prog *prog,
1033 #endif /* CONFIG_INET */
1035 #endif /* _LINUX_BPF_H */