1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /* Copyright (c) 2011-2014 PLUMgrid, http://plumgrid.com
7 #include <uapi/linux/bpf.h>
9 #include <linux/workqueue.h>
10 #include <linux/file.h>
11 #include <linux/percpu.h>
12 #include <linux/err.h>
13 #include <linux/rbtree_latch.h>
14 #include <linux/numa.h>
15 #include <linux/wait.h>
16 #include <linux/u64_stats_sync.h>
18 struct bpf_verifier_env;
27 /* map is generic key/value storage optionally accesible by eBPF programs */
29 /* funcs callable from userspace (via syscall) */
30 int (*map_alloc_check)(union bpf_attr *attr);
31 struct bpf_map *(*map_alloc)(union bpf_attr *attr);
32 void (*map_release)(struct bpf_map *map, struct file *map_file);
33 void (*map_free)(struct bpf_map *map);
34 int (*map_get_next_key)(struct bpf_map *map, void *key, void *next_key);
35 void (*map_release_uref)(struct bpf_map *map);
36 void *(*map_lookup_elem_sys_only)(struct bpf_map *map, void *key);
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);
42 int (*map_push_elem)(struct bpf_map *map, void *value, u64 flags);
43 int (*map_pop_elem)(struct bpf_map *map, void *value);
44 int (*map_peek_elem)(struct bpf_map *map, void *value);
46 /* funcs called by prog_array and perf_event_array map */
47 void *(*map_fd_get_ptr)(struct bpf_map *map, struct file *map_file,
49 void (*map_fd_put_ptr)(void *ptr);
50 u32 (*map_gen_lookup)(struct bpf_map *map, struct bpf_insn *insn_buf);
51 u32 (*map_fd_sys_lookup_elem)(void *ptr);
52 void (*map_seq_show_elem)(struct bpf_map *map, void *key,
54 int (*map_check_btf)(const struct bpf_map *map,
55 const struct btf *btf,
56 const struct btf_type *key_type,
57 const struct btf_type *value_type);
59 /* Direct value access helpers. */
60 int (*map_direct_value_addr)(const struct bpf_map *map,
62 int (*map_direct_value_meta)(const struct bpf_map *map,
67 /* The first two cachelines with read-mostly members of which some
68 * are also accessed in fast-path (e.g. ops, max_entries).
70 const struct bpf_map_ops *ops ____cacheline_aligned;
71 struct bpf_map *inner_map_meta;
72 #ifdef CONFIG_SECURITY
75 enum bpf_map_type map_type;
80 int spin_lock_off; /* >=0 valid offset, <0 error */
84 u32 btf_value_type_id;
88 bool frozen; /* write-once */
91 /* The 3rd and 4th cacheline with misc members to avoid false sharing
92 * particularly with refcounting.
94 struct user_struct *user ____cacheline_aligned;
97 struct work_struct work;
98 char name[BPF_OBJ_NAME_LEN];
101 static inline bool map_value_has_spin_lock(const struct bpf_map *map)
103 return map->spin_lock_off >= 0;
106 static inline void check_and_init_map_lock(struct bpf_map *map, void *dst)
108 if (likely(!map_value_has_spin_lock(map)))
110 *(struct bpf_spin_lock *)(dst + map->spin_lock_off) =
111 (struct bpf_spin_lock){};
114 /* copy everything but bpf_spin_lock */
115 static inline void copy_map_value(struct bpf_map *map, void *dst, void *src)
117 if (unlikely(map_value_has_spin_lock(map))) {
118 u32 off = map->spin_lock_off;
120 memcpy(dst, src, off);
121 memcpy(dst + off + sizeof(struct bpf_spin_lock),
122 src + off + sizeof(struct bpf_spin_lock),
123 map->value_size - off - sizeof(struct bpf_spin_lock));
125 memcpy(dst, src, map->value_size);
128 void copy_map_value_locked(struct bpf_map *map, void *dst, void *src,
131 struct bpf_offload_dev;
132 struct bpf_offloaded_map;
134 struct bpf_map_dev_ops {
135 int (*map_get_next_key)(struct bpf_offloaded_map *map,
136 void *key, void *next_key);
137 int (*map_lookup_elem)(struct bpf_offloaded_map *map,
138 void *key, void *value);
139 int (*map_update_elem)(struct bpf_offloaded_map *map,
140 void *key, void *value, u64 flags);
141 int (*map_delete_elem)(struct bpf_offloaded_map *map, void *key);
144 struct bpf_offloaded_map {
146 struct net_device *netdev;
147 const struct bpf_map_dev_ops *dev_ops;
149 struct list_head offloads;
152 static inline struct bpf_offloaded_map *map_to_offmap(struct bpf_map *map)
154 return container_of(map, struct bpf_offloaded_map, map);
157 static inline bool bpf_map_offload_neutral(const struct bpf_map *map)
159 return map->map_type == BPF_MAP_TYPE_PERF_EVENT_ARRAY;
162 static inline bool bpf_map_support_seq_show(const struct bpf_map *map)
164 return map->btf && map->ops->map_seq_show_elem;
167 int map_check_no_btf(const struct bpf_map *map,
168 const struct btf *btf,
169 const struct btf_type *key_type,
170 const struct btf_type *value_type);
172 extern const struct bpf_map_ops bpf_map_offload_ops;
174 /* function argument constraints */
176 ARG_DONTCARE = 0, /* unused argument in helper function */
178 /* the following constraints used to prototype
179 * bpf_map_lookup/update/delete_elem() functions
181 ARG_CONST_MAP_PTR, /* const argument used as pointer to bpf_map */
182 ARG_PTR_TO_MAP_KEY, /* pointer to stack used as map key */
183 ARG_PTR_TO_MAP_VALUE, /* pointer to stack used as map value */
184 ARG_PTR_TO_UNINIT_MAP_VALUE, /* pointer to valid memory used to store a map value */
185 ARG_PTR_TO_MAP_VALUE_OR_NULL, /* pointer to stack used as map value or NULL */
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 */
204 ARG_PTR_TO_INT, /* pointer to int */
205 ARG_PTR_TO_LONG, /* pointer to long */
206 ARG_PTR_TO_SOCKET, /* pointer to bpf_sock (fullsock) */
209 /* type of values returned from helper functions */
210 enum bpf_return_type {
211 RET_INTEGER, /* function returns integer */
212 RET_VOID, /* function doesn't return anything */
213 RET_PTR_TO_MAP_VALUE, /* returns a pointer to map elem value */
214 RET_PTR_TO_MAP_VALUE_OR_NULL, /* returns a pointer to map elem value or NULL */
215 RET_PTR_TO_SOCKET_OR_NULL, /* returns a pointer to a socket or NULL */
216 RET_PTR_TO_TCP_SOCK_OR_NULL, /* returns a pointer to a tcp_sock or NULL */
217 RET_PTR_TO_SOCK_COMMON_OR_NULL, /* returns a pointer to a sock_common or NULL */
220 /* eBPF function prototype used by verifier to allow BPF_CALLs from eBPF programs
221 * to in-kernel helper functions and for adjusting imm32 field in BPF_CALL
222 * instructions after verifying
224 struct bpf_func_proto {
225 u64 (*func)(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
228 enum bpf_return_type ret_type;
229 enum bpf_arg_type arg1_type;
230 enum bpf_arg_type arg2_type;
231 enum bpf_arg_type arg3_type;
232 enum bpf_arg_type arg4_type;
233 enum bpf_arg_type arg5_type;
236 /* bpf_context is intentionally undefined structure. Pointer to bpf_context is
237 * the first argument to eBPF programs.
238 * For socket filters: 'struct bpf_context *' == 'struct sk_buff *'
242 enum bpf_access_type {
247 /* types of values stored in eBPF registers */
248 /* Pointer types represent:
251 * pointer + (u16) var
252 * pointer + (u16) var + imm
253 * if (range > 0) then [ptr, ptr + range - off) is safe to access
254 * if (id > 0) means that some 'var' was added
255 * if (off > 0) means that 'imm' was added
258 NOT_INIT = 0, /* nothing was written into register */
259 SCALAR_VALUE, /* reg doesn't contain a valid pointer */
260 PTR_TO_CTX, /* reg points to bpf_context */
261 CONST_PTR_TO_MAP, /* reg points to struct bpf_map */
262 PTR_TO_MAP_VALUE, /* reg points to map element value */
263 PTR_TO_MAP_VALUE_OR_NULL,/* points to map elem value or NULL */
264 PTR_TO_STACK, /* reg == frame_pointer + offset */
265 PTR_TO_PACKET_META, /* skb->data - meta_len */
266 PTR_TO_PACKET, /* reg points to skb->data */
267 PTR_TO_PACKET_END, /* skb->data + headlen */
268 PTR_TO_FLOW_KEYS, /* reg points to bpf_flow_keys */
269 PTR_TO_SOCKET, /* reg points to struct bpf_sock */
270 PTR_TO_SOCKET_OR_NULL, /* reg points to struct bpf_sock or NULL */
271 PTR_TO_SOCK_COMMON, /* reg points to sock_common */
272 PTR_TO_SOCK_COMMON_OR_NULL, /* reg points to sock_common or NULL */
273 PTR_TO_TCP_SOCK, /* reg points to struct tcp_sock */
274 PTR_TO_TCP_SOCK_OR_NULL, /* reg points to struct tcp_sock or NULL */
275 PTR_TO_TP_BUFFER, /* reg points to a writable raw tp's buffer */
278 /* The information passed from prog-specific *_is_valid_access
279 * back to the verifier.
281 struct bpf_insn_access_aux {
282 enum bpf_reg_type reg_type;
287 bpf_ctx_record_field_size(struct bpf_insn_access_aux *aux, u32 size)
289 aux->ctx_field_size = size;
292 struct bpf_prog_ops {
293 int (*test_run)(struct bpf_prog *prog, const union bpf_attr *kattr,
294 union bpf_attr __user *uattr);
297 struct bpf_verifier_ops {
298 /* return eBPF function prototype for verification */
299 const struct bpf_func_proto *
300 (*get_func_proto)(enum bpf_func_id func_id,
301 const struct bpf_prog *prog);
303 /* return true if 'size' wide access at offset 'off' within bpf_context
304 * with 'type' (read or write) is allowed
306 bool (*is_valid_access)(int off, int size, enum bpf_access_type type,
307 const struct bpf_prog *prog,
308 struct bpf_insn_access_aux *info);
309 int (*gen_prologue)(struct bpf_insn *insn, bool direct_write,
310 const struct bpf_prog *prog);
311 int (*gen_ld_abs)(const struct bpf_insn *orig,
312 struct bpf_insn *insn_buf);
313 u32 (*convert_ctx_access)(enum bpf_access_type type,
314 const struct bpf_insn *src,
315 struct bpf_insn *dst,
316 struct bpf_prog *prog, u32 *target_size);
319 struct bpf_prog_offload_ops {
320 /* verifier basic callbacks */
321 int (*insn_hook)(struct bpf_verifier_env *env,
322 int insn_idx, int prev_insn_idx);
323 int (*finalize)(struct bpf_verifier_env *env);
324 /* verifier optimization callbacks (called after .finalize) */
325 int (*replace_insn)(struct bpf_verifier_env *env, u32 off,
326 struct bpf_insn *insn);
327 int (*remove_insns)(struct bpf_verifier_env *env, u32 off, u32 cnt);
328 /* program management callbacks */
329 int (*prepare)(struct bpf_prog *prog);
330 int (*translate)(struct bpf_prog *prog);
331 void (*destroy)(struct bpf_prog *prog);
334 struct bpf_prog_offload {
335 struct bpf_prog *prog;
336 struct net_device *netdev;
337 struct bpf_offload_dev *offdev;
339 struct list_head offloads;
346 enum bpf_cgroup_storage_type {
347 BPF_CGROUP_STORAGE_SHARED,
348 BPF_CGROUP_STORAGE_PERCPU,
349 __BPF_CGROUP_STORAGE_MAX
352 #define MAX_BPF_CGROUP_STORAGE_TYPE __BPF_CGROUP_STORAGE_MAX
354 struct bpf_prog_stats {
357 struct u64_stats_sync syncp;
360 struct bpf_prog_aux {
368 u32 func_cnt; /* used by non-func prog as the number of func progs */
369 u32 func_idx; /* 0 for non-func prog, the index in func array for func prog */
370 bool offload_requested;
371 struct bpf_prog **func;
372 void *jit_data; /* JIT specific data. arch dependent */
373 struct latch_tree_node ksym_tnode;
374 struct list_head ksym_lnode;
375 const struct bpf_prog_ops *ops;
376 struct bpf_map **used_maps;
377 struct bpf_prog *prog;
378 struct user_struct *user;
379 u64 load_time; /* ns since boottime */
380 struct bpf_map *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE];
381 char name[BPF_OBJ_NAME_LEN];
382 #ifdef CONFIG_SECURITY
385 struct bpf_prog_offload *offload;
387 struct bpf_func_info *func_info;
388 /* bpf_line_info loaded from userspace. linfo->insn_off
389 * has the xlated insn offset.
390 * Both the main and sub prog share the same linfo.
391 * The subprog can access its first linfo by
392 * using the linfo_idx.
394 struct bpf_line_info *linfo;
395 /* jited_linfo is the jited addr of the linfo. It has a
396 * one to one mapping to linfo:
397 * jited_linfo[i] is the jited addr for the linfo[i]->insn_off.
398 * Both the main and sub prog share the same jited_linfo.
399 * The subprog can access its first jited_linfo by
400 * using the linfo_idx.
405 /* subprog can use linfo_idx to access its first linfo and
407 * main prog always has linfo_idx == 0
410 struct bpf_prog_stats __percpu *stats;
412 struct work_struct work;
421 /* 'ownership' of prog_array is claimed by the first program that
422 * is going to use this map or by the first program which FD is stored
423 * in the map to make sure that all callers and callees have the same
424 * prog_type and JITed flag
426 enum bpf_prog_type owner_prog_type;
429 char value[0] __aligned(8);
430 void *ptrs[0] __aligned(8);
431 void __percpu *pptrs[0] __aligned(8);
435 #define BPF_COMPLEXITY_LIMIT_INSNS 1000000 /* yes. 1M insns */
436 #define MAX_TAIL_CALL_CNT 32
438 #define BPF_F_ACCESS_MASK (BPF_F_RDONLY | \
439 BPF_F_RDONLY_PROG | \
443 #define BPF_MAP_CAN_READ BIT(0)
444 #define BPF_MAP_CAN_WRITE BIT(1)
446 static inline u32 bpf_map_flags_to_cap(struct bpf_map *map)
448 u32 access_flags = map->map_flags & (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG);
450 /* Combination of BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG is
453 if (access_flags & BPF_F_RDONLY_PROG)
454 return BPF_MAP_CAN_READ;
455 else if (access_flags & BPF_F_WRONLY_PROG)
456 return BPF_MAP_CAN_WRITE;
458 return BPF_MAP_CAN_READ | BPF_MAP_CAN_WRITE;
461 static inline bool bpf_map_flags_access_ok(u32 access_flags)
463 return (access_flags & (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG)) !=
464 (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG);
467 struct bpf_event_entry {
468 struct perf_event *event;
469 struct file *perf_file;
470 struct file *map_file;
474 bool bpf_prog_array_compatible(struct bpf_array *array, const struct bpf_prog *fp);
475 int bpf_prog_calc_tag(struct bpf_prog *fp);
477 const struct bpf_func_proto *bpf_get_trace_printk_proto(void);
479 typedef unsigned long (*bpf_ctx_copy_t)(void *dst, const void *src,
480 unsigned long off, unsigned long len);
481 typedef u32 (*bpf_convert_ctx_access_t)(enum bpf_access_type type,
482 const struct bpf_insn *src,
483 struct bpf_insn *dst,
484 struct bpf_prog *prog,
487 u64 bpf_event_output(struct bpf_map *map, u64 flags, void *meta, u64 meta_size,
488 void *ctx, u64 ctx_size, bpf_ctx_copy_t ctx_copy);
490 /* an array of programs to be executed under rcu_lock.
493 * ret = BPF_PROG_RUN_ARRAY(&bpf_prog_array, ctx, BPF_PROG_RUN);
495 * the structure returned by bpf_prog_array_alloc() should be populated
496 * with program pointers and the last pointer must be NULL.
497 * The user has to keep refcnt on the program and make sure the program
498 * is removed from the array before bpf_prog_put().
499 * The 'struct bpf_prog_array *' should only be replaced with xchg()
500 * since other cpus are walking the array of pointers in parallel.
502 struct bpf_prog_array_item {
503 struct bpf_prog *prog;
504 struct bpf_cgroup_storage *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE];
507 struct bpf_prog_array {
509 struct bpf_prog_array_item items[0];
512 struct bpf_prog_array *bpf_prog_array_alloc(u32 prog_cnt, gfp_t flags);
513 void bpf_prog_array_free(struct bpf_prog_array __rcu *progs);
514 int bpf_prog_array_length(struct bpf_prog_array __rcu *progs);
515 int bpf_prog_array_copy_to_user(struct bpf_prog_array __rcu *progs,
516 __u32 __user *prog_ids, u32 cnt);
518 void bpf_prog_array_delete_safe(struct bpf_prog_array __rcu *progs,
519 struct bpf_prog *old_prog);
520 int bpf_prog_array_copy_info(struct bpf_prog_array __rcu *array,
521 u32 *prog_ids, u32 request_cnt,
523 int bpf_prog_array_copy(struct bpf_prog_array __rcu *old_array,
524 struct bpf_prog *exclude_prog,
525 struct bpf_prog *include_prog,
526 struct bpf_prog_array **new_array);
528 #define __BPF_PROG_RUN_ARRAY(array, ctx, func, check_non_null) \
530 struct bpf_prog_array_item *_item; \
531 struct bpf_prog *_prog; \
532 struct bpf_prog_array *_array; \
536 _array = rcu_dereference(array); \
537 if (unlikely(check_non_null && !_array))\
539 _item = &_array->items[0]; \
540 while ((_prog = READ_ONCE(_item->prog))) { \
541 bpf_cgroup_storage_set(_item->cgroup_storage); \
542 _ret &= func(_prog, ctx); \
551 #define BPF_PROG_RUN_ARRAY(array, ctx, func) \
552 __BPF_PROG_RUN_ARRAY(array, ctx, func, false)
554 #define BPF_PROG_RUN_ARRAY_CHECK(array, ctx, func) \
555 __BPF_PROG_RUN_ARRAY(array, ctx, func, true)
557 #ifdef CONFIG_BPF_SYSCALL
558 DECLARE_PER_CPU(int, bpf_prog_active);
560 extern const struct file_operations bpf_map_fops;
561 extern const struct file_operations bpf_prog_fops;
563 #define BPF_PROG_TYPE(_id, _name) \
564 extern const struct bpf_prog_ops _name ## _prog_ops; \
565 extern const struct bpf_verifier_ops _name ## _verifier_ops;
566 #define BPF_MAP_TYPE(_id, _ops) \
567 extern const struct bpf_map_ops _ops;
568 #include <linux/bpf_types.h>
572 extern const struct bpf_prog_ops bpf_offload_prog_ops;
573 extern const struct bpf_verifier_ops tc_cls_act_analyzer_ops;
574 extern const struct bpf_verifier_ops xdp_analyzer_ops;
576 struct bpf_prog *bpf_prog_get(u32 ufd);
577 struct bpf_prog *bpf_prog_get_type_dev(u32 ufd, enum bpf_prog_type type,
579 struct bpf_prog * __must_check bpf_prog_add(struct bpf_prog *prog, int i);
580 void bpf_prog_sub(struct bpf_prog *prog, int i);
581 struct bpf_prog * __must_check bpf_prog_inc(struct bpf_prog *prog);
582 struct bpf_prog * __must_check bpf_prog_inc_not_zero(struct bpf_prog *prog);
583 void bpf_prog_put(struct bpf_prog *prog);
584 int __bpf_prog_charge(struct user_struct *user, u32 pages);
585 void __bpf_prog_uncharge(struct user_struct *user, u32 pages);
587 void bpf_prog_free_id(struct bpf_prog *prog, bool do_idr_lock);
588 void bpf_map_free_id(struct bpf_map *map, bool do_idr_lock);
590 struct bpf_map *bpf_map_get_with_uref(u32 ufd);
591 struct bpf_map *__bpf_map_get(struct fd f);
592 struct bpf_map * __must_check bpf_map_inc(struct bpf_map *map, bool uref);
593 void bpf_map_put_with_uref(struct bpf_map *map);
594 void bpf_map_put(struct bpf_map *map);
595 int bpf_map_precharge_memlock(u32 pages);
596 int bpf_map_charge_memlock(struct bpf_map *map, u32 pages);
597 void bpf_map_uncharge_memlock(struct bpf_map *map, u32 pages);
598 void *bpf_map_area_alloc(size_t size, int numa_node);
599 void bpf_map_area_free(void *base);
600 void bpf_map_init_from_attr(struct bpf_map *map, union bpf_attr *attr);
602 extern int sysctl_unprivileged_bpf_disabled;
603 extern int sysctl_bpf_stats_enabled;
605 int bpf_map_new_fd(struct bpf_map *map, int flags);
606 int bpf_prog_new_fd(struct bpf_prog *prog);
608 int bpf_obj_pin_user(u32 ufd, const char __user *pathname);
609 int bpf_obj_get_user(const char __user *pathname, int flags);
611 int bpf_percpu_hash_copy(struct bpf_map *map, void *key, void *value);
612 int bpf_percpu_array_copy(struct bpf_map *map, void *key, void *value);
613 int bpf_percpu_hash_update(struct bpf_map *map, void *key, void *value,
615 int bpf_percpu_array_update(struct bpf_map *map, void *key, void *value,
618 int bpf_stackmap_copy(struct bpf_map *map, void *key, void *value);
620 int bpf_fd_array_map_update_elem(struct bpf_map *map, struct file *map_file,
621 void *key, void *value, u64 map_flags);
622 int bpf_fd_array_map_lookup_elem(struct bpf_map *map, void *key, u32 *value);
623 int bpf_fd_htab_map_update_elem(struct bpf_map *map, struct file *map_file,
624 void *key, void *value, u64 map_flags);
625 int bpf_fd_htab_map_lookup_elem(struct bpf_map *map, void *key, u32 *value);
627 int bpf_get_file_flag(int flags);
628 int bpf_check_uarg_tail_zero(void __user *uaddr, size_t expected_size,
631 /* memcpy that is used with 8-byte aligned pointers, power-of-8 size and
632 * forced to use 'long' read/writes to try to atomically copy long counters.
633 * Best-effort only. No barriers here, since it _will_ race with concurrent
634 * updates from BPF programs. Called from bpf syscall and mostly used with
635 * size 8 or 16 bytes, so ask compiler to inline it.
637 static inline void bpf_long_memcpy(void *dst, const void *src, u32 size)
639 const long *lsrc = src;
642 size /= sizeof(long);
647 /* verify correctness of eBPF program */
648 int bpf_check(struct bpf_prog **fp, union bpf_attr *attr,
649 union bpf_attr __user *uattr);
650 void bpf_patch_call_args(struct bpf_insn *insn, u32 stack_depth);
656 struct bpf_dtab_netdev *__dev_map_lookup_elem(struct bpf_map *map, u32 key);
657 void __dev_map_insert_ctx(struct bpf_map *map, u32 index);
658 void __dev_map_flush(struct bpf_map *map);
659 int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp,
660 struct net_device *dev_rx);
661 int dev_map_generic_redirect(struct bpf_dtab_netdev *dst, struct sk_buff *skb,
662 struct bpf_prog *xdp_prog);
664 struct bpf_cpu_map_entry *__cpu_map_lookup_elem(struct bpf_map *map, u32 key);
665 void __cpu_map_insert_ctx(struct bpf_map *map, u32 index);
666 void __cpu_map_flush(struct bpf_map *map);
667 int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu, struct xdp_buff *xdp,
668 struct net_device *dev_rx);
670 /* Return map's numa specified by userspace */
671 static inline int bpf_map_attr_numa_node(const union bpf_attr *attr)
673 return (attr->map_flags & BPF_F_NUMA_NODE) ?
674 attr->numa_node : NUMA_NO_NODE;
677 struct bpf_prog *bpf_prog_get_type_path(const char *name, enum bpf_prog_type type);
678 int array_map_alloc_check(union bpf_attr *attr);
680 int bpf_prog_test_run_xdp(struct bpf_prog *prog, const union bpf_attr *kattr,
681 union bpf_attr __user *uattr);
682 int bpf_prog_test_run_skb(struct bpf_prog *prog, const union bpf_attr *kattr,
683 union bpf_attr __user *uattr);
684 int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog,
685 const union bpf_attr *kattr,
686 union bpf_attr __user *uattr);
687 #else /* !CONFIG_BPF_SYSCALL */
688 static inline struct bpf_prog *bpf_prog_get(u32 ufd)
690 return ERR_PTR(-EOPNOTSUPP);
693 static inline struct bpf_prog *bpf_prog_get_type_dev(u32 ufd,
694 enum bpf_prog_type type,
697 return ERR_PTR(-EOPNOTSUPP);
700 static inline struct bpf_prog * __must_check bpf_prog_add(struct bpf_prog *prog,
703 return ERR_PTR(-EOPNOTSUPP);
706 static inline void bpf_prog_sub(struct bpf_prog *prog, int i)
710 static inline void bpf_prog_put(struct bpf_prog *prog)
714 static inline struct bpf_prog * __must_check bpf_prog_inc(struct bpf_prog *prog)
716 return ERR_PTR(-EOPNOTSUPP);
719 static inline struct bpf_prog *__must_check
720 bpf_prog_inc_not_zero(struct bpf_prog *prog)
722 return ERR_PTR(-EOPNOTSUPP);
725 static inline int __bpf_prog_charge(struct user_struct *user, u32 pages)
730 static inline void __bpf_prog_uncharge(struct user_struct *user, u32 pages)
734 static inline int bpf_obj_get_user(const char __user *pathname, int flags)
739 static inline struct net_device *__dev_map_lookup_elem(struct bpf_map *map,
745 static inline void __dev_map_insert_ctx(struct bpf_map *map, u32 index)
749 static inline void __dev_map_flush(struct bpf_map *map)
754 struct bpf_dtab_netdev;
757 int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp,
758 struct net_device *dev_rx)
765 static inline int dev_map_generic_redirect(struct bpf_dtab_netdev *dst,
767 struct bpf_prog *xdp_prog)
773 struct bpf_cpu_map_entry *__cpu_map_lookup_elem(struct bpf_map *map, u32 key)
778 static inline void __cpu_map_insert_ctx(struct bpf_map *map, u32 index)
782 static inline void __cpu_map_flush(struct bpf_map *map)
786 static inline int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu,
787 struct xdp_buff *xdp,
788 struct net_device *dev_rx)
793 static inline struct bpf_prog *bpf_prog_get_type_path(const char *name,
794 enum bpf_prog_type type)
796 return ERR_PTR(-EOPNOTSUPP);
799 static inline int bpf_prog_test_run_xdp(struct bpf_prog *prog,
800 const union bpf_attr *kattr,
801 union bpf_attr __user *uattr)
806 static inline int bpf_prog_test_run_skb(struct bpf_prog *prog,
807 const union bpf_attr *kattr,
808 union bpf_attr __user *uattr)
813 static inline int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog,
814 const union bpf_attr *kattr,
815 union bpf_attr __user *uattr)
819 #endif /* CONFIG_BPF_SYSCALL */
821 static inline struct bpf_prog *bpf_prog_get_type(u32 ufd,
822 enum bpf_prog_type type)
824 return bpf_prog_get_type_dev(ufd, type, false);
827 bool bpf_prog_get_ok(struct bpf_prog *, enum bpf_prog_type *, bool);
829 int bpf_prog_offload_compile(struct bpf_prog *prog);
830 void bpf_prog_offload_destroy(struct bpf_prog *prog);
831 int bpf_prog_offload_info_fill(struct bpf_prog_info *info,
832 struct bpf_prog *prog);
834 int bpf_map_offload_info_fill(struct bpf_map_info *info, struct bpf_map *map);
836 int bpf_map_offload_lookup_elem(struct bpf_map *map, void *key, void *value);
837 int bpf_map_offload_update_elem(struct bpf_map *map,
838 void *key, void *value, u64 flags);
839 int bpf_map_offload_delete_elem(struct bpf_map *map, void *key);
840 int bpf_map_offload_get_next_key(struct bpf_map *map,
841 void *key, void *next_key);
843 bool bpf_offload_prog_map_match(struct bpf_prog *prog, struct bpf_map *map);
845 struct bpf_offload_dev *
846 bpf_offload_dev_create(const struct bpf_prog_offload_ops *ops, void *priv);
847 void bpf_offload_dev_destroy(struct bpf_offload_dev *offdev);
848 void *bpf_offload_dev_priv(struct bpf_offload_dev *offdev);
849 int bpf_offload_dev_netdev_register(struct bpf_offload_dev *offdev,
850 struct net_device *netdev);
851 void bpf_offload_dev_netdev_unregister(struct bpf_offload_dev *offdev,
852 struct net_device *netdev);
853 bool bpf_offload_dev_match(struct bpf_prog *prog, struct net_device *netdev);
855 #if defined(CONFIG_NET) && defined(CONFIG_BPF_SYSCALL)
856 int bpf_prog_offload_init(struct bpf_prog *prog, union bpf_attr *attr);
858 static inline bool bpf_prog_is_dev_bound(const struct bpf_prog_aux *aux)
860 return aux->offload_requested;
863 static inline bool bpf_map_is_dev_bound(struct bpf_map *map)
865 return unlikely(map->ops == &bpf_map_offload_ops);
868 struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr);
869 void bpf_map_offload_map_free(struct bpf_map *map);
871 static inline int bpf_prog_offload_init(struct bpf_prog *prog,
872 union bpf_attr *attr)
877 static inline bool bpf_prog_is_dev_bound(struct bpf_prog_aux *aux)
882 static inline bool bpf_map_is_dev_bound(struct bpf_map *map)
887 static inline struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr)
889 return ERR_PTR(-EOPNOTSUPP);
892 static inline void bpf_map_offload_map_free(struct bpf_map *map)
895 #endif /* CONFIG_NET && CONFIG_BPF_SYSCALL */
897 #if defined(CONFIG_BPF_STREAM_PARSER)
898 int sock_map_prog_update(struct bpf_map *map, struct bpf_prog *prog, u32 which);
899 int sock_map_get_from_fd(const union bpf_attr *attr, struct bpf_prog *prog);
901 static inline int sock_map_prog_update(struct bpf_map *map,
902 struct bpf_prog *prog, u32 which)
907 static inline int sock_map_get_from_fd(const union bpf_attr *attr,
908 struct bpf_prog *prog)
914 #if defined(CONFIG_XDP_SOCKETS)
916 struct xdp_sock *__xsk_map_lookup_elem(struct bpf_map *map, u32 key);
917 int __xsk_map_redirect(struct bpf_map *map, struct xdp_buff *xdp,
918 struct xdp_sock *xs);
919 void __xsk_map_flush(struct bpf_map *map);
922 static inline struct xdp_sock *__xsk_map_lookup_elem(struct bpf_map *map,
928 static inline int __xsk_map_redirect(struct bpf_map *map, struct xdp_buff *xdp,
934 static inline void __xsk_map_flush(struct bpf_map *map)
939 #if defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL)
940 void bpf_sk_reuseport_detach(struct sock *sk);
941 int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map, void *key,
943 int bpf_fd_reuseport_array_update_elem(struct bpf_map *map, void *key,
944 void *value, u64 map_flags);
946 static inline void bpf_sk_reuseport_detach(struct sock *sk)
950 #ifdef CONFIG_BPF_SYSCALL
951 static inline int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map,
952 void *key, void *value)
957 static inline int bpf_fd_reuseport_array_update_elem(struct bpf_map *map,
958 void *key, void *value,
963 #endif /* CONFIG_BPF_SYSCALL */
964 #endif /* defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL) */
966 /* verifier prototypes for helper functions called from eBPF programs */
967 extern const struct bpf_func_proto bpf_map_lookup_elem_proto;
968 extern const struct bpf_func_proto bpf_map_update_elem_proto;
969 extern const struct bpf_func_proto bpf_map_delete_elem_proto;
970 extern const struct bpf_func_proto bpf_map_push_elem_proto;
971 extern const struct bpf_func_proto bpf_map_pop_elem_proto;
972 extern const struct bpf_func_proto bpf_map_peek_elem_proto;
974 extern const struct bpf_func_proto bpf_get_prandom_u32_proto;
975 extern const struct bpf_func_proto bpf_get_smp_processor_id_proto;
976 extern const struct bpf_func_proto bpf_get_numa_node_id_proto;
977 extern const struct bpf_func_proto bpf_tail_call_proto;
978 extern const struct bpf_func_proto bpf_ktime_get_ns_proto;
979 extern const struct bpf_func_proto bpf_get_current_pid_tgid_proto;
980 extern const struct bpf_func_proto bpf_get_current_uid_gid_proto;
981 extern const struct bpf_func_proto bpf_get_current_comm_proto;
982 extern const struct bpf_func_proto bpf_get_stackid_proto;
983 extern const struct bpf_func_proto bpf_get_stack_proto;
984 extern const struct bpf_func_proto bpf_sock_map_update_proto;
985 extern const struct bpf_func_proto bpf_sock_hash_update_proto;
986 extern const struct bpf_func_proto bpf_get_current_cgroup_id_proto;
987 extern const struct bpf_func_proto bpf_msg_redirect_hash_proto;
988 extern const struct bpf_func_proto bpf_msg_redirect_map_proto;
989 extern const struct bpf_func_proto bpf_sk_redirect_hash_proto;
990 extern const struct bpf_func_proto bpf_sk_redirect_map_proto;
991 extern const struct bpf_func_proto bpf_spin_lock_proto;
992 extern const struct bpf_func_proto bpf_spin_unlock_proto;
993 extern const struct bpf_func_proto bpf_get_local_storage_proto;
994 extern const struct bpf_func_proto bpf_strtol_proto;
995 extern const struct bpf_func_proto bpf_strtoul_proto;
997 /* Shared helpers among cBPF and eBPF. */
998 void bpf_user_rnd_init_once(void);
999 u64 bpf_user_rnd_u32(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
1001 #if defined(CONFIG_NET)
1002 bool bpf_sock_common_is_valid_access(int off, int size,
1003 enum bpf_access_type type,
1004 struct bpf_insn_access_aux *info);
1005 bool bpf_sock_is_valid_access(int off, int size, enum bpf_access_type type,
1006 struct bpf_insn_access_aux *info);
1007 u32 bpf_sock_convert_ctx_access(enum bpf_access_type type,
1008 const struct bpf_insn *si,
1009 struct bpf_insn *insn_buf,
1010 struct bpf_prog *prog,
1013 static inline bool bpf_sock_common_is_valid_access(int off, int size,
1014 enum bpf_access_type type,
1015 struct bpf_insn_access_aux *info)
1019 static inline bool bpf_sock_is_valid_access(int off, int size,
1020 enum bpf_access_type type,
1021 struct bpf_insn_access_aux *info)
1025 static inline u32 bpf_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,
1036 bool bpf_tcp_sock_is_valid_access(int off, int size, enum bpf_access_type type,
1037 struct bpf_insn_access_aux *info);
1039 u32 bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type,
1040 const struct bpf_insn *si,
1041 struct bpf_insn *insn_buf,
1042 struct bpf_prog *prog,
1045 static inline bool bpf_tcp_sock_is_valid_access(int off, int size,
1046 enum bpf_access_type type,
1047 struct bpf_insn_access_aux *info)
1052 static inline u32 bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type,
1053 const struct bpf_insn *si,
1054 struct bpf_insn *insn_buf,
1055 struct bpf_prog *prog,
1060 #endif /* CONFIG_INET */
1062 #endif /* _LINUX_BPF_H */