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);
39 void *(*map_lookup_elem_sys_only)(struct bpf_map *map, void *key);
41 /* funcs callable from userspace and from eBPF programs */
42 void *(*map_lookup_elem)(struct bpf_map *map, void *key);
43 int (*map_update_elem)(struct bpf_map *map, void *key, void *value, u64 flags);
44 int (*map_delete_elem)(struct bpf_map *map, void *key);
45 int (*map_push_elem)(struct bpf_map *map, void *value, u64 flags);
46 int (*map_pop_elem)(struct bpf_map *map, void *value);
47 int (*map_peek_elem)(struct bpf_map *map, void *value);
49 /* funcs called by prog_array and perf_event_array map */
50 void *(*map_fd_get_ptr)(struct bpf_map *map, struct file *map_file,
52 void (*map_fd_put_ptr)(void *ptr);
53 u32 (*map_gen_lookup)(struct bpf_map *map, struct bpf_insn *insn_buf);
54 u32 (*map_fd_sys_lookup_elem)(void *ptr);
55 void (*map_seq_show_elem)(struct bpf_map *map, void *key,
57 int (*map_check_btf)(const struct bpf_map *map,
58 const struct btf *btf,
59 const struct btf_type *key_type,
60 const struct btf_type *value_type);
62 /* Direct value access helpers. */
63 int (*map_direct_value_addr)(const struct bpf_map *map,
65 int (*map_direct_value_meta)(const struct bpf_map *map,
70 /* The first two cachelines with read-mostly members of which some
71 * are also accessed in fast-path (e.g. ops, max_entries).
73 const struct bpf_map_ops *ops ____cacheline_aligned;
74 struct bpf_map *inner_map_meta;
75 #ifdef CONFIG_SECURITY
78 enum bpf_map_type map_type;
83 int spin_lock_off; /* >=0 valid offset, <0 error */
87 u32 btf_value_type_id;
91 bool frozen; /* write-once */
94 /* The 3rd and 4th cacheline with misc members to avoid false sharing
95 * particularly with refcounting.
97 struct user_struct *user ____cacheline_aligned;
100 struct work_struct work;
101 char name[BPF_OBJ_NAME_LEN];
104 static inline bool map_value_has_spin_lock(const struct bpf_map *map)
106 return map->spin_lock_off >= 0;
109 static inline void check_and_init_map_lock(struct bpf_map *map, void *dst)
111 if (likely(!map_value_has_spin_lock(map)))
113 *(struct bpf_spin_lock *)(dst + map->spin_lock_off) =
114 (struct bpf_spin_lock){};
117 /* copy everything but bpf_spin_lock */
118 static inline void copy_map_value(struct bpf_map *map, void *dst, void *src)
120 if (unlikely(map_value_has_spin_lock(map))) {
121 u32 off = map->spin_lock_off;
123 memcpy(dst, src, off);
124 memcpy(dst + off + sizeof(struct bpf_spin_lock),
125 src + off + sizeof(struct bpf_spin_lock),
126 map->value_size - off - sizeof(struct bpf_spin_lock));
128 memcpy(dst, src, map->value_size);
131 void copy_map_value_locked(struct bpf_map *map, void *dst, void *src,
134 struct bpf_offload_dev;
135 struct bpf_offloaded_map;
137 struct bpf_map_dev_ops {
138 int (*map_get_next_key)(struct bpf_offloaded_map *map,
139 void *key, void *next_key);
140 int (*map_lookup_elem)(struct bpf_offloaded_map *map,
141 void *key, void *value);
142 int (*map_update_elem)(struct bpf_offloaded_map *map,
143 void *key, void *value, u64 flags);
144 int (*map_delete_elem)(struct bpf_offloaded_map *map, void *key);
147 struct bpf_offloaded_map {
149 struct net_device *netdev;
150 const struct bpf_map_dev_ops *dev_ops;
152 struct list_head offloads;
155 static inline struct bpf_offloaded_map *map_to_offmap(struct bpf_map *map)
157 return container_of(map, struct bpf_offloaded_map, map);
160 static inline bool bpf_map_offload_neutral(const struct bpf_map *map)
162 return map->map_type == BPF_MAP_TYPE_PERF_EVENT_ARRAY;
165 static inline bool bpf_map_support_seq_show(const struct bpf_map *map)
167 return map->btf && map->ops->map_seq_show_elem;
170 int map_check_no_btf(const struct bpf_map *map,
171 const struct btf *btf,
172 const struct btf_type *key_type,
173 const struct btf_type *value_type);
175 extern const struct bpf_map_ops bpf_map_offload_ops;
177 /* function argument constraints */
179 ARG_DONTCARE = 0, /* unused argument in helper function */
181 /* the following constraints used to prototype
182 * bpf_map_lookup/update/delete_elem() functions
184 ARG_CONST_MAP_PTR, /* const argument used as pointer to bpf_map */
185 ARG_PTR_TO_MAP_KEY, /* pointer to stack used as map key */
186 ARG_PTR_TO_MAP_VALUE, /* pointer to stack used as map value */
187 ARG_PTR_TO_UNINIT_MAP_VALUE, /* pointer to valid memory used to store a map value */
188 ARG_PTR_TO_MAP_VALUE_OR_NULL, /* pointer to stack used as map value or NULL */
190 /* the following constraints used to prototype bpf_memcmp() and other
191 * functions that access data on eBPF program stack
193 ARG_PTR_TO_MEM, /* pointer to valid memory (stack, packet, map value) */
194 ARG_PTR_TO_MEM_OR_NULL, /* pointer to valid memory or NULL */
195 ARG_PTR_TO_UNINIT_MEM, /* pointer to memory does not need to be initialized,
196 * helper function must fill all bytes or clear
197 * them in error case.
200 ARG_CONST_SIZE, /* number of bytes accessed from memory */
201 ARG_CONST_SIZE_OR_ZERO, /* number of bytes accessed from memory or 0 */
203 ARG_PTR_TO_CTX, /* pointer to context */
204 ARG_ANYTHING, /* any (initialized) argument is ok */
205 ARG_PTR_TO_SPIN_LOCK, /* pointer to bpf_spin_lock */
206 ARG_PTR_TO_SOCK_COMMON, /* pointer to sock_common */
207 ARG_PTR_TO_INT, /* pointer to int */
208 ARG_PTR_TO_LONG, /* pointer to long */
209 ARG_PTR_TO_SOCKET, /* pointer to bpf_sock (fullsock) */
212 /* type of values returned from helper functions */
213 enum bpf_return_type {
214 RET_INTEGER, /* function returns integer */
215 RET_VOID, /* function doesn't return anything */
216 RET_PTR_TO_MAP_VALUE, /* returns a pointer to map elem value */
217 RET_PTR_TO_MAP_VALUE_OR_NULL, /* returns a pointer to map elem value or NULL */
218 RET_PTR_TO_SOCKET_OR_NULL, /* returns a pointer to a socket or NULL */
219 RET_PTR_TO_TCP_SOCK_OR_NULL, /* returns a pointer to a tcp_sock or NULL */
220 RET_PTR_TO_SOCK_COMMON_OR_NULL, /* returns a pointer to a sock_common or NULL */
223 /* eBPF function prototype used by verifier to allow BPF_CALLs from eBPF programs
224 * to in-kernel helper functions and for adjusting imm32 field in BPF_CALL
225 * instructions after verifying
227 struct bpf_func_proto {
228 u64 (*func)(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
231 enum bpf_return_type ret_type;
232 enum bpf_arg_type arg1_type;
233 enum bpf_arg_type arg2_type;
234 enum bpf_arg_type arg3_type;
235 enum bpf_arg_type arg4_type;
236 enum bpf_arg_type arg5_type;
239 /* bpf_context is intentionally undefined structure. Pointer to bpf_context is
240 * the first argument to eBPF programs.
241 * For socket filters: 'struct bpf_context *' == 'struct sk_buff *'
245 enum bpf_access_type {
250 /* types of values stored in eBPF registers */
251 /* Pointer types represent:
254 * pointer + (u16) var
255 * pointer + (u16) var + imm
256 * if (range > 0) then [ptr, ptr + range - off) is safe to access
257 * if (id > 0) means that some 'var' was added
258 * if (off > 0) means that 'imm' was added
261 NOT_INIT = 0, /* nothing was written into register */
262 SCALAR_VALUE, /* reg doesn't contain a valid pointer */
263 PTR_TO_CTX, /* reg points to bpf_context */
264 CONST_PTR_TO_MAP, /* reg points to struct bpf_map */
265 PTR_TO_MAP_VALUE, /* reg points to map element value */
266 PTR_TO_MAP_VALUE_OR_NULL,/* points to map elem value or NULL */
267 PTR_TO_STACK, /* reg == frame_pointer + offset */
268 PTR_TO_PACKET_META, /* skb->data - meta_len */
269 PTR_TO_PACKET, /* reg points to skb->data */
270 PTR_TO_PACKET_END, /* skb->data + headlen */
271 PTR_TO_FLOW_KEYS, /* reg points to bpf_flow_keys */
272 PTR_TO_SOCKET, /* reg points to struct bpf_sock */
273 PTR_TO_SOCKET_OR_NULL, /* reg points to struct bpf_sock or NULL */
274 PTR_TO_SOCK_COMMON, /* reg points to sock_common */
275 PTR_TO_SOCK_COMMON_OR_NULL, /* reg points to sock_common or NULL */
276 PTR_TO_TCP_SOCK, /* reg points to struct tcp_sock */
277 PTR_TO_TCP_SOCK_OR_NULL, /* reg points to struct tcp_sock or NULL */
278 PTR_TO_TP_BUFFER, /* reg points to a writable raw tp's buffer */
281 /* The information passed from prog-specific *_is_valid_access
282 * back to the verifier.
284 struct bpf_insn_access_aux {
285 enum bpf_reg_type reg_type;
290 bpf_ctx_record_field_size(struct bpf_insn_access_aux *aux, u32 size)
292 aux->ctx_field_size = size;
295 struct bpf_prog_ops {
296 int (*test_run)(struct bpf_prog *prog, const union bpf_attr *kattr,
297 union bpf_attr __user *uattr);
300 struct bpf_verifier_ops {
301 /* return eBPF function prototype for verification */
302 const struct bpf_func_proto *
303 (*get_func_proto)(enum bpf_func_id func_id,
304 const struct bpf_prog *prog);
306 /* return true if 'size' wide access at offset 'off' within bpf_context
307 * with 'type' (read or write) is allowed
309 bool (*is_valid_access)(int off, int size, enum bpf_access_type type,
310 const struct bpf_prog *prog,
311 struct bpf_insn_access_aux *info);
312 int (*gen_prologue)(struct bpf_insn *insn, bool direct_write,
313 const struct bpf_prog *prog);
314 int (*gen_ld_abs)(const struct bpf_insn *orig,
315 struct bpf_insn *insn_buf);
316 u32 (*convert_ctx_access)(enum bpf_access_type type,
317 const struct bpf_insn *src,
318 struct bpf_insn *dst,
319 struct bpf_prog *prog, u32 *target_size);
322 struct bpf_prog_offload_ops {
323 /* verifier basic callbacks */
324 int (*insn_hook)(struct bpf_verifier_env *env,
325 int insn_idx, int prev_insn_idx);
326 int (*finalize)(struct bpf_verifier_env *env);
327 /* verifier optimization callbacks (called after .finalize) */
328 int (*replace_insn)(struct bpf_verifier_env *env, u32 off,
329 struct bpf_insn *insn);
330 int (*remove_insns)(struct bpf_verifier_env *env, u32 off, u32 cnt);
331 /* program management callbacks */
332 int (*prepare)(struct bpf_prog *prog);
333 int (*translate)(struct bpf_prog *prog);
334 void (*destroy)(struct bpf_prog *prog);
337 struct bpf_prog_offload {
338 struct bpf_prog *prog;
339 struct net_device *netdev;
340 struct bpf_offload_dev *offdev;
342 struct list_head offloads;
349 enum bpf_cgroup_storage_type {
350 BPF_CGROUP_STORAGE_SHARED,
351 BPF_CGROUP_STORAGE_PERCPU,
352 __BPF_CGROUP_STORAGE_MAX
355 #define MAX_BPF_CGROUP_STORAGE_TYPE __BPF_CGROUP_STORAGE_MAX
357 struct bpf_prog_stats {
360 struct u64_stats_sync syncp;
363 struct bpf_prog_aux {
371 u32 func_cnt; /* used by non-func prog as the number of func progs */
372 u32 func_idx; /* 0 for non-func prog, the index in func array for func prog */
373 bool verifier_zext; /* Zero extensions has been inserted by verifier. */
374 bool offload_requested;
375 struct bpf_prog **func;
376 void *jit_data; /* JIT specific data. arch dependent */
377 struct latch_tree_node ksym_tnode;
378 struct list_head ksym_lnode;
379 const struct bpf_prog_ops *ops;
380 struct bpf_map **used_maps;
381 struct bpf_prog *prog;
382 struct user_struct *user;
383 u64 load_time; /* ns since boottime */
384 struct bpf_map *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE];
385 char name[BPF_OBJ_NAME_LEN];
386 #ifdef CONFIG_SECURITY
389 struct bpf_prog_offload *offload;
391 struct bpf_func_info *func_info;
392 /* bpf_line_info loaded from userspace. linfo->insn_off
393 * has the xlated insn offset.
394 * Both the main and sub prog share the same linfo.
395 * The subprog can access its first linfo by
396 * using the linfo_idx.
398 struct bpf_line_info *linfo;
399 /* jited_linfo is the jited addr of the linfo. It has a
400 * one to one mapping to linfo:
401 * jited_linfo[i] is the jited addr for the linfo[i]->insn_off.
402 * Both the main and sub prog share the same jited_linfo.
403 * The subprog can access its first jited_linfo by
404 * using the linfo_idx.
409 /* subprog can use linfo_idx to access its first linfo and
411 * main prog always has linfo_idx == 0
414 struct bpf_prog_stats __percpu *stats;
416 struct work_struct work;
425 /* 'ownership' of prog_array is claimed by the first program that
426 * is going to use this map or by the first program which FD is stored
427 * in the map to make sure that all callers and callees have the same
428 * prog_type and JITed flag
430 enum bpf_prog_type owner_prog_type;
433 char value[0] __aligned(8);
434 void *ptrs[0] __aligned(8);
435 void __percpu *pptrs[0] __aligned(8);
439 #define BPF_COMPLEXITY_LIMIT_INSNS 1000000 /* yes. 1M insns */
440 #define MAX_TAIL_CALL_CNT 32
442 #define BPF_F_ACCESS_MASK (BPF_F_RDONLY | \
443 BPF_F_RDONLY_PROG | \
447 #define BPF_MAP_CAN_READ BIT(0)
448 #define BPF_MAP_CAN_WRITE BIT(1)
450 static inline u32 bpf_map_flags_to_cap(struct bpf_map *map)
452 u32 access_flags = map->map_flags & (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG);
454 /* Combination of BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG is
457 if (access_flags & BPF_F_RDONLY_PROG)
458 return BPF_MAP_CAN_READ;
459 else if (access_flags & BPF_F_WRONLY_PROG)
460 return BPF_MAP_CAN_WRITE;
462 return BPF_MAP_CAN_READ | BPF_MAP_CAN_WRITE;
465 static inline bool bpf_map_flags_access_ok(u32 access_flags)
467 return (access_flags & (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG)) !=
468 (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG);
471 struct bpf_event_entry {
472 struct perf_event *event;
473 struct file *perf_file;
474 struct file *map_file;
478 bool bpf_prog_array_compatible(struct bpf_array *array, const struct bpf_prog *fp);
479 int bpf_prog_calc_tag(struct bpf_prog *fp);
481 const struct bpf_func_proto *bpf_get_trace_printk_proto(void);
483 typedef unsigned long (*bpf_ctx_copy_t)(void *dst, const void *src,
484 unsigned long off, unsigned long len);
485 typedef u32 (*bpf_convert_ctx_access_t)(enum bpf_access_type type,
486 const struct bpf_insn *src,
487 struct bpf_insn *dst,
488 struct bpf_prog *prog,
491 u64 bpf_event_output(struct bpf_map *map, u64 flags, void *meta, u64 meta_size,
492 void *ctx, u64 ctx_size, bpf_ctx_copy_t ctx_copy);
494 /* an array of programs to be executed under rcu_lock.
497 * ret = BPF_PROG_RUN_ARRAY(&bpf_prog_array, ctx, BPF_PROG_RUN);
499 * the structure returned by bpf_prog_array_alloc() should be populated
500 * with program pointers and the last pointer must be NULL.
501 * The user has to keep refcnt on the program and make sure the program
502 * is removed from the array before bpf_prog_put().
503 * The 'struct bpf_prog_array *' should only be replaced with xchg()
504 * since other cpus are walking the array of pointers in parallel.
506 struct bpf_prog_array_item {
507 struct bpf_prog *prog;
508 struct bpf_cgroup_storage *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE];
511 struct bpf_prog_array {
513 struct bpf_prog_array_item items[0];
516 struct bpf_prog_array *bpf_prog_array_alloc(u32 prog_cnt, gfp_t flags);
517 void bpf_prog_array_free(struct bpf_prog_array *progs);
518 int bpf_prog_array_length(struct bpf_prog_array *progs);
519 int bpf_prog_array_copy_to_user(struct bpf_prog_array *progs,
520 __u32 __user *prog_ids, u32 cnt);
522 void bpf_prog_array_delete_safe(struct bpf_prog_array *progs,
523 struct bpf_prog *old_prog);
524 int bpf_prog_array_copy_info(struct bpf_prog_array *array,
525 u32 *prog_ids, u32 request_cnt,
527 int bpf_prog_array_copy(struct bpf_prog_array *old_array,
528 struct bpf_prog *exclude_prog,
529 struct bpf_prog *include_prog,
530 struct bpf_prog_array **new_array);
532 #define __BPF_PROG_RUN_ARRAY(array, ctx, func, check_non_null) \
534 struct bpf_prog_array_item *_item; \
535 struct bpf_prog *_prog; \
536 struct bpf_prog_array *_array; \
540 _array = rcu_dereference(array); \
541 if (unlikely(check_non_null && !_array))\
543 _item = &_array->items[0]; \
544 while ((_prog = READ_ONCE(_item->prog))) { \
545 bpf_cgroup_storage_set(_item->cgroup_storage); \
546 _ret &= func(_prog, ctx); \
555 #define BPF_PROG_RUN_ARRAY(array, ctx, func) \
556 __BPF_PROG_RUN_ARRAY(array, ctx, func, false)
558 #define BPF_PROG_RUN_ARRAY_CHECK(array, ctx, func) \
559 __BPF_PROG_RUN_ARRAY(array, ctx, func, true)
561 #ifdef CONFIG_BPF_SYSCALL
562 DECLARE_PER_CPU(int, bpf_prog_active);
564 extern const struct file_operations bpf_map_fops;
565 extern const struct file_operations bpf_prog_fops;
567 #define BPF_PROG_TYPE(_id, _name) \
568 extern const struct bpf_prog_ops _name ## _prog_ops; \
569 extern const struct bpf_verifier_ops _name ## _verifier_ops;
570 #define BPF_MAP_TYPE(_id, _ops) \
571 extern const struct bpf_map_ops _ops;
572 #include <linux/bpf_types.h>
576 extern const struct bpf_prog_ops bpf_offload_prog_ops;
577 extern const struct bpf_verifier_ops tc_cls_act_analyzer_ops;
578 extern const struct bpf_verifier_ops xdp_analyzer_ops;
580 struct bpf_prog *bpf_prog_get(u32 ufd);
581 struct bpf_prog *bpf_prog_get_type_dev(u32 ufd, enum bpf_prog_type type,
583 struct bpf_prog * __must_check bpf_prog_add(struct bpf_prog *prog, int i);
584 void bpf_prog_sub(struct bpf_prog *prog, int i);
585 struct bpf_prog * __must_check bpf_prog_inc(struct bpf_prog *prog);
586 struct bpf_prog * __must_check bpf_prog_inc_not_zero(struct bpf_prog *prog);
587 void bpf_prog_put(struct bpf_prog *prog);
588 int __bpf_prog_charge(struct user_struct *user, u32 pages);
589 void __bpf_prog_uncharge(struct user_struct *user, u32 pages);
591 void bpf_prog_free_id(struct bpf_prog *prog, bool do_idr_lock);
592 void bpf_map_free_id(struct bpf_map *map, bool do_idr_lock);
594 struct bpf_map *bpf_map_get_with_uref(u32 ufd);
595 struct bpf_map *__bpf_map_get(struct fd f);
596 struct bpf_map * __must_check bpf_map_inc(struct bpf_map *map, bool uref);
597 void bpf_map_put_with_uref(struct bpf_map *map);
598 void bpf_map_put(struct bpf_map *map);
599 int bpf_map_precharge_memlock(u32 pages);
600 int bpf_map_charge_memlock(struct bpf_map *map, u32 pages);
601 void bpf_map_uncharge_memlock(struct bpf_map *map, u32 pages);
602 void *bpf_map_area_alloc(size_t size, int numa_node);
603 void bpf_map_area_free(void *base);
604 void bpf_map_init_from_attr(struct bpf_map *map, union bpf_attr *attr);
606 extern int sysctl_unprivileged_bpf_disabled;
607 extern int sysctl_bpf_stats_enabled;
609 int bpf_map_new_fd(struct bpf_map *map, int flags);
610 int bpf_prog_new_fd(struct bpf_prog *prog);
612 int bpf_obj_pin_user(u32 ufd, const char __user *pathname);
613 int bpf_obj_get_user(const char __user *pathname, int flags);
615 int bpf_percpu_hash_copy(struct bpf_map *map, void *key, void *value);
616 int bpf_percpu_array_copy(struct bpf_map *map, void *key, void *value);
617 int bpf_percpu_hash_update(struct bpf_map *map, void *key, void *value,
619 int bpf_percpu_array_update(struct bpf_map *map, void *key, void *value,
622 int bpf_stackmap_copy(struct bpf_map *map, void *key, void *value);
624 int bpf_fd_array_map_update_elem(struct bpf_map *map, struct file *map_file,
625 void *key, void *value, u64 map_flags);
626 int bpf_fd_array_map_lookup_elem(struct bpf_map *map, void *key, u32 *value);
627 int bpf_fd_htab_map_update_elem(struct bpf_map *map, struct file *map_file,
628 void *key, void *value, u64 map_flags);
629 int bpf_fd_htab_map_lookup_elem(struct bpf_map *map, void *key, u32 *value);
631 int bpf_get_file_flag(int flags);
632 int bpf_check_uarg_tail_zero(void __user *uaddr, size_t expected_size,
635 /* memcpy that is used with 8-byte aligned pointers, power-of-8 size and
636 * forced to use 'long' read/writes to try to atomically copy long counters.
637 * Best-effort only. No barriers here, since it _will_ race with concurrent
638 * updates from BPF programs. Called from bpf syscall and mostly used with
639 * size 8 or 16 bytes, so ask compiler to inline it.
641 static inline void bpf_long_memcpy(void *dst, const void *src, u32 size)
643 const long *lsrc = src;
646 size /= sizeof(long);
651 /* verify correctness of eBPF program */
652 int bpf_check(struct bpf_prog **fp, union bpf_attr *attr,
653 union bpf_attr __user *uattr);
654 void bpf_patch_call_args(struct bpf_insn *insn, u32 stack_depth);
660 struct bpf_dtab_netdev *__dev_map_lookup_elem(struct bpf_map *map, u32 key);
661 void __dev_map_insert_ctx(struct bpf_map *map, u32 index);
662 void __dev_map_flush(struct bpf_map *map);
663 int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp,
664 struct net_device *dev_rx);
665 int dev_map_generic_redirect(struct bpf_dtab_netdev *dst, struct sk_buff *skb,
666 struct bpf_prog *xdp_prog);
668 struct bpf_cpu_map_entry *__cpu_map_lookup_elem(struct bpf_map *map, u32 key);
669 void __cpu_map_insert_ctx(struct bpf_map *map, u32 index);
670 void __cpu_map_flush(struct bpf_map *map);
671 int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu, struct xdp_buff *xdp,
672 struct net_device *dev_rx);
674 /* Return map's numa specified by userspace */
675 static inline int bpf_map_attr_numa_node(const union bpf_attr *attr)
677 return (attr->map_flags & BPF_F_NUMA_NODE) ?
678 attr->numa_node : NUMA_NO_NODE;
681 struct bpf_prog *bpf_prog_get_type_path(const char *name, enum bpf_prog_type type);
682 int array_map_alloc_check(union bpf_attr *attr);
684 int bpf_prog_test_run_xdp(struct bpf_prog *prog, const union bpf_attr *kattr,
685 union bpf_attr __user *uattr);
686 int bpf_prog_test_run_skb(struct bpf_prog *prog, const union bpf_attr *kattr,
687 union bpf_attr __user *uattr);
688 int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog,
689 const union bpf_attr *kattr,
690 union bpf_attr __user *uattr);
691 #else /* !CONFIG_BPF_SYSCALL */
692 static inline struct bpf_prog *bpf_prog_get(u32 ufd)
694 return ERR_PTR(-EOPNOTSUPP);
697 static inline struct bpf_prog *bpf_prog_get_type_dev(u32 ufd,
698 enum bpf_prog_type type,
701 return ERR_PTR(-EOPNOTSUPP);
704 static inline struct bpf_prog * __must_check bpf_prog_add(struct bpf_prog *prog,
707 return ERR_PTR(-EOPNOTSUPP);
710 static inline void bpf_prog_sub(struct bpf_prog *prog, int i)
714 static inline void bpf_prog_put(struct bpf_prog *prog)
718 static inline struct bpf_prog * __must_check bpf_prog_inc(struct bpf_prog *prog)
720 return ERR_PTR(-EOPNOTSUPP);
723 static inline struct bpf_prog *__must_check
724 bpf_prog_inc_not_zero(struct bpf_prog *prog)
726 return ERR_PTR(-EOPNOTSUPP);
729 static inline int __bpf_prog_charge(struct user_struct *user, u32 pages)
734 static inline void __bpf_prog_uncharge(struct user_struct *user, u32 pages)
738 static inline int bpf_obj_get_user(const char __user *pathname, int flags)
743 static inline struct net_device *__dev_map_lookup_elem(struct bpf_map *map,
749 static inline void __dev_map_insert_ctx(struct bpf_map *map, u32 index)
753 static inline void __dev_map_flush(struct bpf_map *map)
758 struct bpf_dtab_netdev;
761 int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp,
762 struct net_device *dev_rx)
769 static inline int dev_map_generic_redirect(struct bpf_dtab_netdev *dst,
771 struct bpf_prog *xdp_prog)
777 struct bpf_cpu_map_entry *__cpu_map_lookup_elem(struct bpf_map *map, u32 key)
782 static inline void __cpu_map_insert_ctx(struct bpf_map *map, u32 index)
786 static inline void __cpu_map_flush(struct bpf_map *map)
790 static inline int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu,
791 struct xdp_buff *xdp,
792 struct net_device *dev_rx)
797 static inline struct bpf_prog *bpf_prog_get_type_path(const char *name,
798 enum bpf_prog_type type)
800 return ERR_PTR(-EOPNOTSUPP);
803 static inline int bpf_prog_test_run_xdp(struct bpf_prog *prog,
804 const union bpf_attr *kattr,
805 union bpf_attr __user *uattr)
810 static inline int bpf_prog_test_run_skb(struct bpf_prog *prog,
811 const union bpf_attr *kattr,
812 union bpf_attr __user *uattr)
817 static inline int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog,
818 const union bpf_attr *kattr,
819 union bpf_attr __user *uattr)
823 #endif /* CONFIG_BPF_SYSCALL */
825 static inline struct bpf_prog *bpf_prog_get_type(u32 ufd,
826 enum bpf_prog_type type)
828 return bpf_prog_get_type_dev(ufd, type, false);
831 bool bpf_prog_get_ok(struct bpf_prog *, enum bpf_prog_type *, bool);
833 int bpf_prog_offload_compile(struct bpf_prog *prog);
834 void bpf_prog_offload_destroy(struct bpf_prog *prog);
835 int bpf_prog_offload_info_fill(struct bpf_prog_info *info,
836 struct bpf_prog *prog);
838 int bpf_map_offload_info_fill(struct bpf_map_info *info, struct bpf_map *map);
840 int bpf_map_offload_lookup_elem(struct bpf_map *map, void *key, void *value);
841 int bpf_map_offload_update_elem(struct bpf_map *map,
842 void *key, void *value, u64 flags);
843 int bpf_map_offload_delete_elem(struct bpf_map *map, void *key);
844 int bpf_map_offload_get_next_key(struct bpf_map *map,
845 void *key, void *next_key);
847 bool bpf_offload_prog_map_match(struct bpf_prog *prog, struct bpf_map *map);
849 struct bpf_offload_dev *
850 bpf_offload_dev_create(const struct bpf_prog_offload_ops *ops, void *priv);
851 void bpf_offload_dev_destroy(struct bpf_offload_dev *offdev);
852 void *bpf_offload_dev_priv(struct bpf_offload_dev *offdev);
853 int bpf_offload_dev_netdev_register(struct bpf_offload_dev *offdev,
854 struct net_device *netdev);
855 void bpf_offload_dev_netdev_unregister(struct bpf_offload_dev *offdev,
856 struct net_device *netdev);
857 bool bpf_offload_dev_match(struct bpf_prog *prog, struct net_device *netdev);
859 #if defined(CONFIG_NET) && defined(CONFIG_BPF_SYSCALL)
860 int bpf_prog_offload_init(struct bpf_prog *prog, union bpf_attr *attr);
862 static inline bool bpf_prog_is_dev_bound(const struct bpf_prog_aux *aux)
864 return aux->offload_requested;
867 static inline bool bpf_map_is_dev_bound(struct bpf_map *map)
869 return unlikely(map->ops == &bpf_map_offload_ops);
872 struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr);
873 void bpf_map_offload_map_free(struct bpf_map *map);
875 static inline int bpf_prog_offload_init(struct bpf_prog *prog,
876 union bpf_attr *attr)
881 static inline bool bpf_prog_is_dev_bound(struct bpf_prog_aux *aux)
886 static inline bool bpf_map_is_dev_bound(struct bpf_map *map)
891 static inline struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr)
893 return ERR_PTR(-EOPNOTSUPP);
896 static inline void bpf_map_offload_map_free(struct bpf_map *map)
899 #endif /* CONFIG_NET && CONFIG_BPF_SYSCALL */
901 #if defined(CONFIG_BPF_STREAM_PARSER)
902 int sock_map_prog_update(struct bpf_map *map, struct bpf_prog *prog, u32 which);
903 int sock_map_get_from_fd(const union bpf_attr *attr, struct bpf_prog *prog);
905 static inline int sock_map_prog_update(struct bpf_map *map,
906 struct bpf_prog *prog, u32 which)
911 static inline int sock_map_get_from_fd(const union bpf_attr *attr,
912 struct bpf_prog *prog)
918 #if defined(CONFIG_XDP_SOCKETS)
920 struct xdp_sock *__xsk_map_lookup_elem(struct bpf_map *map, u32 key);
921 int __xsk_map_redirect(struct bpf_map *map, struct xdp_buff *xdp,
922 struct xdp_sock *xs);
923 void __xsk_map_flush(struct bpf_map *map);
926 static inline struct xdp_sock *__xsk_map_lookup_elem(struct bpf_map *map,
932 static inline int __xsk_map_redirect(struct bpf_map *map, struct xdp_buff *xdp,
938 static inline void __xsk_map_flush(struct bpf_map *map)
943 #if defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL)
944 void bpf_sk_reuseport_detach(struct sock *sk);
945 int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map, void *key,
947 int bpf_fd_reuseport_array_update_elem(struct bpf_map *map, void *key,
948 void *value, u64 map_flags);
950 static inline void bpf_sk_reuseport_detach(struct sock *sk)
954 #ifdef CONFIG_BPF_SYSCALL
955 static inline int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map,
956 void *key, void *value)
961 static inline int bpf_fd_reuseport_array_update_elem(struct bpf_map *map,
962 void *key, void *value,
967 #endif /* CONFIG_BPF_SYSCALL */
968 #endif /* defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL) */
970 /* verifier prototypes for helper functions called from eBPF programs */
971 extern const struct bpf_func_proto bpf_map_lookup_elem_proto;
972 extern const struct bpf_func_proto bpf_map_update_elem_proto;
973 extern const struct bpf_func_proto bpf_map_delete_elem_proto;
974 extern const struct bpf_func_proto bpf_map_push_elem_proto;
975 extern const struct bpf_func_proto bpf_map_pop_elem_proto;
976 extern const struct bpf_func_proto bpf_map_peek_elem_proto;
978 extern const struct bpf_func_proto bpf_get_prandom_u32_proto;
979 extern const struct bpf_func_proto bpf_get_smp_processor_id_proto;
980 extern const struct bpf_func_proto bpf_get_numa_node_id_proto;
981 extern const struct bpf_func_proto bpf_tail_call_proto;
982 extern const struct bpf_func_proto bpf_ktime_get_ns_proto;
983 extern const struct bpf_func_proto bpf_get_current_pid_tgid_proto;
984 extern const struct bpf_func_proto bpf_get_current_uid_gid_proto;
985 extern const struct bpf_func_proto bpf_get_current_comm_proto;
986 extern const struct bpf_func_proto bpf_get_stackid_proto;
987 extern const struct bpf_func_proto bpf_get_stack_proto;
988 extern const struct bpf_func_proto bpf_sock_map_update_proto;
989 extern const struct bpf_func_proto bpf_sock_hash_update_proto;
990 extern const struct bpf_func_proto bpf_get_current_cgroup_id_proto;
991 extern const struct bpf_func_proto bpf_msg_redirect_hash_proto;
992 extern const struct bpf_func_proto bpf_msg_redirect_map_proto;
993 extern const struct bpf_func_proto bpf_sk_redirect_hash_proto;
994 extern const struct bpf_func_proto bpf_sk_redirect_map_proto;
995 extern const struct bpf_func_proto bpf_spin_lock_proto;
996 extern const struct bpf_func_proto bpf_spin_unlock_proto;
997 extern const struct bpf_func_proto bpf_get_local_storage_proto;
998 extern const struct bpf_func_proto bpf_strtol_proto;
999 extern const struct bpf_func_proto bpf_strtoul_proto;
1001 /* Shared helpers among cBPF and eBPF. */
1002 void bpf_user_rnd_init_once(void);
1003 u64 bpf_user_rnd_u32(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
1005 #if defined(CONFIG_NET)
1006 bool bpf_sock_common_is_valid_access(int off, int size,
1007 enum bpf_access_type type,
1008 struct bpf_insn_access_aux *info);
1009 bool bpf_sock_is_valid_access(int off, int size, enum bpf_access_type type,
1010 struct bpf_insn_access_aux *info);
1011 u32 bpf_sock_convert_ctx_access(enum bpf_access_type type,
1012 const struct bpf_insn *si,
1013 struct bpf_insn *insn_buf,
1014 struct bpf_prog *prog,
1017 static inline bool bpf_sock_common_is_valid_access(int off, int size,
1018 enum bpf_access_type type,
1019 struct bpf_insn_access_aux *info)
1023 static inline bool bpf_sock_is_valid_access(int off, int size,
1024 enum bpf_access_type type,
1025 struct bpf_insn_access_aux *info)
1029 static inline u32 bpf_sock_convert_ctx_access(enum bpf_access_type type,
1030 const struct bpf_insn *si,
1031 struct bpf_insn *insn_buf,
1032 struct bpf_prog *prog,
1040 bool bpf_tcp_sock_is_valid_access(int off, int size, enum bpf_access_type type,
1041 struct bpf_insn_access_aux *info);
1043 u32 bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type,
1044 const struct bpf_insn *si,
1045 struct bpf_insn *insn_buf,
1046 struct bpf_prog *prog,
1049 static inline bool bpf_tcp_sock_is_valid_access(int off, int size,
1050 enum bpf_access_type type,
1051 struct bpf_insn_access_aux *info)
1056 static inline u32 bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type,
1057 const struct bpf_insn *si,
1058 struct bpf_insn *insn_buf,
1059 struct bpf_prog *prog,
1064 #endif /* CONFIG_INET */
1066 #endif /* _LINUX_BPF_H */