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;
90 bool frozen; /* write-once */
93 /* The 3rd and 4th cacheline with misc members to avoid false sharing
94 * particularly with refcounting.
96 struct user_struct *user ____cacheline_aligned;
99 struct work_struct work;
100 char name[BPF_OBJ_NAME_LEN];
103 static inline bool map_value_has_spin_lock(const struct bpf_map *map)
105 return map->spin_lock_off >= 0;
108 static inline void check_and_init_map_lock(struct bpf_map *map, void *dst)
110 if (likely(!map_value_has_spin_lock(map)))
112 *(struct bpf_spin_lock *)(dst + map->spin_lock_off) =
113 (struct bpf_spin_lock){};
116 /* copy everything but bpf_spin_lock */
117 static inline void copy_map_value(struct bpf_map *map, void *dst, void *src)
119 if (unlikely(map_value_has_spin_lock(map))) {
120 u32 off = map->spin_lock_off;
122 memcpy(dst, src, off);
123 memcpy(dst + off + sizeof(struct bpf_spin_lock),
124 src + off + sizeof(struct bpf_spin_lock),
125 map->value_size - off - sizeof(struct bpf_spin_lock));
127 memcpy(dst, src, map->value_size);
130 void copy_map_value_locked(struct bpf_map *map, void *dst, void *src,
133 struct bpf_offload_dev;
134 struct bpf_offloaded_map;
136 struct bpf_map_dev_ops {
137 int (*map_get_next_key)(struct bpf_offloaded_map *map,
138 void *key, void *next_key);
139 int (*map_lookup_elem)(struct bpf_offloaded_map *map,
140 void *key, void *value);
141 int (*map_update_elem)(struct bpf_offloaded_map *map,
142 void *key, void *value, u64 flags);
143 int (*map_delete_elem)(struct bpf_offloaded_map *map, void *key);
146 struct bpf_offloaded_map {
148 struct net_device *netdev;
149 const struct bpf_map_dev_ops *dev_ops;
151 struct list_head offloads;
154 static inline struct bpf_offloaded_map *map_to_offmap(struct bpf_map *map)
156 return container_of(map, struct bpf_offloaded_map, map);
159 static inline bool bpf_map_offload_neutral(const struct bpf_map *map)
161 return map->map_type == BPF_MAP_TYPE_PERF_EVENT_ARRAY;
164 static inline bool bpf_map_support_seq_show(const struct bpf_map *map)
166 return map->btf && map->ops->map_seq_show_elem;
169 int map_check_no_btf(const struct bpf_map *map,
170 const struct btf *btf,
171 const struct btf_type *key_type,
172 const struct btf_type *value_type);
174 extern const struct bpf_map_ops bpf_map_offload_ops;
176 /* function argument constraints */
178 ARG_DONTCARE = 0, /* unused argument in helper function */
180 /* the following constraints used to prototype
181 * bpf_map_lookup/update/delete_elem() functions
183 ARG_CONST_MAP_PTR, /* const argument used as pointer to bpf_map */
184 ARG_PTR_TO_MAP_KEY, /* pointer to stack used as map key */
185 ARG_PTR_TO_MAP_VALUE, /* pointer to stack used as map value */
186 ARG_PTR_TO_UNINIT_MAP_VALUE, /* pointer to valid memory used to store a map value */
187 ARG_PTR_TO_MAP_VALUE_OR_NULL, /* pointer to stack used as map value or NULL */
189 /* the following constraints used to prototype bpf_memcmp() and other
190 * functions that access data on eBPF program stack
192 ARG_PTR_TO_MEM, /* pointer to valid memory (stack, packet, map value) */
193 ARG_PTR_TO_MEM_OR_NULL, /* pointer to valid memory or NULL */
194 ARG_PTR_TO_UNINIT_MEM, /* pointer to memory does not need to be initialized,
195 * helper function must fill all bytes or clear
196 * them in error case.
199 ARG_CONST_SIZE, /* number of bytes accessed from memory */
200 ARG_CONST_SIZE_OR_ZERO, /* number of bytes accessed from memory or 0 */
202 ARG_PTR_TO_CTX, /* pointer to context */
203 ARG_ANYTHING, /* any (initialized) argument is ok */
204 ARG_PTR_TO_SPIN_LOCK, /* pointer to bpf_spin_lock */
205 ARG_PTR_TO_SOCK_COMMON, /* pointer to sock_common */
206 ARG_PTR_TO_INT, /* pointer to int */
207 ARG_PTR_TO_LONG, /* pointer to long */
208 ARG_PTR_TO_SOCKET, /* pointer to bpf_sock (fullsock) */
211 /* type of values returned from helper functions */
212 enum bpf_return_type {
213 RET_INTEGER, /* function returns integer */
214 RET_VOID, /* function doesn't return anything */
215 RET_PTR_TO_MAP_VALUE, /* returns a pointer to map elem value */
216 RET_PTR_TO_MAP_VALUE_OR_NULL, /* returns a pointer to map elem value or NULL */
217 RET_PTR_TO_SOCKET_OR_NULL, /* returns a pointer to a socket or NULL */
218 RET_PTR_TO_TCP_SOCK_OR_NULL, /* returns a pointer to a tcp_sock or NULL */
219 RET_PTR_TO_SOCK_COMMON_OR_NULL, /* returns a pointer to a sock_common or NULL */
222 /* eBPF function prototype used by verifier to allow BPF_CALLs from eBPF programs
223 * to in-kernel helper functions and for adjusting imm32 field in BPF_CALL
224 * instructions after verifying
226 struct bpf_func_proto {
227 u64 (*func)(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
230 enum bpf_return_type ret_type;
231 enum bpf_arg_type arg1_type;
232 enum bpf_arg_type arg2_type;
233 enum bpf_arg_type arg3_type;
234 enum bpf_arg_type arg4_type;
235 enum bpf_arg_type arg5_type;
238 /* bpf_context is intentionally undefined structure. Pointer to bpf_context is
239 * the first argument to eBPF programs.
240 * For socket filters: 'struct bpf_context *' == 'struct sk_buff *'
244 enum bpf_access_type {
249 /* types of values stored in eBPF registers */
250 /* Pointer types represent:
253 * pointer + (u16) var
254 * pointer + (u16) var + imm
255 * if (range > 0) then [ptr, ptr + range - off) is safe to access
256 * if (id > 0) means that some 'var' was added
257 * if (off > 0) means that 'imm' was added
260 NOT_INIT = 0, /* nothing was written into register */
261 SCALAR_VALUE, /* reg doesn't contain a valid pointer */
262 PTR_TO_CTX, /* reg points to bpf_context */
263 CONST_PTR_TO_MAP, /* reg points to struct bpf_map */
264 PTR_TO_MAP_VALUE, /* reg points to map element value */
265 PTR_TO_MAP_VALUE_OR_NULL,/* points to map elem value or NULL */
266 PTR_TO_STACK, /* reg == frame_pointer + offset */
267 PTR_TO_PACKET_META, /* skb->data - meta_len */
268 PTR_TO_PACKET, /* reg points to skb->data */
269 PTR_TO_PACKET_END, /* skb->data + headlen */
270 PTR_TO_FLOW_KEYS, /* reg points to bpf_flow_keys */
271 PTR_TO_SOCKET, /* reg points to struct bpf_sock */
272 PTR_TO_SOCKET_OR_NULL, /* reg points to struct bpf_sock or NULL */
273 PTR_TO_SOCK_COMMON, /* reg points to sock_common */
274 PTR_TO_SOCK_COMMON_OR_NULL, /* reg points to sock_common or NULL */
275 PTR_TO_TCP_SOCK, /* reg points to struct tcp_sock */
276 PTR_TO_TCP_SOCK_OR_NULL, /* reg points to struct tcp_sock or NULL */
277 PTR_TO_TP_BUFFER, /* reg points to a writable raw tp's buffer */
280 /* The information passed from prog-specific *_is_valid_access
281 * back to the verifier.
283 struct bpf_insn_access_aux {
284 enum bpf_reg_type reg_type;
289 bpf_ctx_record_field_size(struct bpf_insn_access_aux *aux, u32 size)
291 aux->ctx_field_size = size;
294 struct bpf_prog_ops {
295 int (*test_run)(struct bpf_prog *prog, const union bpf_attr *kattr,
296 union bpf_attr __user *uattr);
299 struct bpf_verifier_ops {
300 /* return eBPF function prototype for verification */
301 const struct bpf_func_proto *
302 (*get_func_proto)(enum bpf_func_id func_id,
303 const struct bpf_prog *prog);
305 /* return true if 'size' wide access at offset 'off' within bpf_context
306 * with 'type' (read or write) is allowed
308 bool (*is_valid_access)(int off, int size, enum bpf_access_type type,
309 const struct bpf_prog *prog,
310 struct bpf_insn_access_aux *info);
311 int (*gen_prologue)(struct bpf_insn *insn, bool direct_write,
312 const struct bpf_prog *prog);
313 int (*gen_ld_abs)(const struct bpf_insn *orig,
314 struct bpf_insn *insn_buf);
315 u32 (*convert_ctx_access)(enum bpf_access_type type,
316 const struct bpf_insn *src,
317 struct bpf_insn *dst,
318 struct bpf_prog *prog, u32 *target_size);
321 struct bpf_prog_offload_ops {
322 /* verifier basic callbacks */
323 int (*insn_hook)(struct bpf_verifier_env *env,
324 int insn_idx, int prev_insn_idx);
325 int (*finalize)(struct bpf_verifier_env *env);
326 /* verifier optimization callbacks (called after .finalize) */
327 int (*replace_insn)(struct bpf_verifier_env *env, u32 off,
328 struct bpf_insn *insn);
329 int (*remove_insns)(struct bpf_verifier_env *env, u32 off, u32 cnt);
330 /* program management callbacks */
331 int (*prepare)(struct bpf_prog *prog);
332 int (*translate)(struct bpf_prog *prog);
333 void (*destroy)(struct bpf_prog *prog);
336 struct bpf_prog_offload {
337 struct bpf_prog *prog;
338 struct net_device *netdev;
339 struct bpf_offload_dev *offdev;
341 struct list_head offloads;
348 enum bpf_cgroup_storage_type {
349 BPF_CGROUP_STORAGE_SHARED,
350 BPF_CGROUP_STORAGE_PERCPU,
351 __BPF_CGROUP_STORAGE_MAX
354 #define MAX_BPF_CGROUP_STORAGE_TYPE __BPF_CGROUP_STORAGE_MAX
356 struct bpf_prog_stats {
359 struct u64_stats_sync syncp;
362 struct bpf_prog_aux {
370 u32 func_cnt; /* used by non-func prog as the number of func progs */
371 u32 func_idx; /* 0 for non-func prog, the index in func array for func prog */
372 bool offload_requested;
373 struct bpf_prog **func;
374 void *jit_data; /* JIT specific data. arch dependent */
375 struct latch_tree_node ksym_tnode;
376 struct list_head ksym_lnode;
377 const struct bpf_prog_ops *ops;
378 struct bpf_map **used_maps;
379 struct bpf_prog *prog;
380 struct user_struct *user;
381 u64 load_time; /* ns since boottime */
382 struct bpf_map *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE];
383 char name[BPF_OBJ_NAME_LEN];
384 #ifdef CONFIG_SECURITY
387 struct bpf_prog_offload *offload;
389 struct bpf_func_info *func_info;
390 /* bpf_line_info loaded from userspace. linfo->insn_off
391 * has the xlated insn offset.
392 * Both the main and sub prog share the same linfo.
393 * The subprog can access its first linfo by
394 * using the linfo_idx.
396 struct bpf_line_info *linfo;
397 /* jited_linfo is the jited addr of the linfo. It has a
398 * one to one mapping to linfo:
399 * jited_linfo[i] is the jited addr for the linfo[i]->insn_off.
400 * Both the main and sub prog share the same jited_linfo.
401 * The subprog can access its first jited_linfo by
402 * using the linfo_idx.
407 /* subprog can use linfo_idx to access its first linfo and
409 * main prog always has linfo_idx == 0
412 struct bpf_prog_stats __percpu *stats;
414 struct work_struct work;
423 /* 'ownership' of prog_array is claimed by the first program that
424 * is going to use this map or by the first program which FD is stored
425 * in the map to make sure that all callers and callees have the same
426 * prog_type and JITed flag
428 enum bpf_prog_type owner_prog_type;
431 char value[0] __aligned(8);
432 void *ptrs[0] __aligned(8);
433 void __percpu *pptrs[0] __aligned(8);
437 #define BPF_COMPLEXITY_LIMIT_INSNS 1000000 /* yes. 1M insns */
438 #define MAX_TAIL_CALL_CNT 32
440 #define BPF_F_ACCESS_MASK (BPF_F_RDONLY | \
441 BPF_F_RDONLY_PROG | \
445 #define BPF_MAP_CAN_READ BIT(0)
446 #define BPF_MAP_CAN_WRITE BIT(1)
448 static inline u32 bpf_map_flags_to_cap(struct bpf_map *map)
450 u32 access_flags = map->map_flags & (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG);
452 /* Combination of BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG is
455 if (access_flags & BPF_F_RDONLY_PROG)
456 return BPF_MAP_CAN_READ;
457 else if (access_flags & BPF_F_WRONLY_PROG)
458 return BPF_MAP_CAN_WRITE;
460 return BPF_MAP_CAN_READ | BPF_MAP_CAN_WRITE;
463 static inline bool bpf_map_flags_access_ok(u32 access_flags)
465 return (access_flags & (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG)) !=
466 (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG);
469 struct bpf_event_entry {
470 struct perf_event *event;
471 struct file *perf_file;
472 struct file *map_file;
476 bool bpf_prog_array_compatible(struct bpf_array *array, const struct bpf_prog *fp);
477 int bpf_prog_calc_tag(struct bpf_prog *fp);
479 const struct bpf_func_proto *bpf_get_trace_printk_proto(void);
481 typedef unsigned long (*bpf_ctx_copy_t)(void *dst, const void *src,
482 unsigned long off, unsigned long len);
483 typedef u32 (*bpf_convert_ctx_access_t)(enum bpf_access_type type,
484 const struct bpf_insn *src,
485 struct bpf_insn *dst,
486 struct bpf_prog *prog,
489 u64 bpf_event_output(struct bpf_map *map, u64 flags, void *meta, u64 meta_size,
490 void *ctx, u64 ctx_size, bpf_ctx_copy_t ctx_copy);
492 /* an array of programs to be executed under rcu_lock.
495 * ret = BPF_PROG_RUN_ARRAY(&bpf_prog_array, ctx, BPF_PROG_RUN);
497 * the structure returned by bpf_prog_array_alloc() should be populated
498 * with program pointers and the last pointer must be NULL.
499 * The user has to keep refcnt on the program and make sure the program
500 * is removed from the array before bpf_prog_put().
501 * The 'struct bpf_prog_array *' should only be replaced with xchg()
502 * since other cpus are walking the array of pointers in parallel.
504 struct bpf_prog_array_item {
505 struct bpf_prog *prog;
506 struct bpf_cgroup_storage *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE];
509 struct bpf_prog_array {
511 struct bpf_prog_array_item items[0];
514 struct bpf_prog_array *bpf_prog_array_alloc(u32 prog_cnt, gfp_t flags);
515 void bpf_prog_array_free(struct bpf_prog_array __rcu *progs);
516 int bpf_prog_array_length(struct bpf_prog_array __rcu *progs);
517 int bpf_prog_array_copy_to_user(struct bpf_prog_array __rcu *progs,
518 __u32 __user *prog_ids, u32 cnt);
520 void bpf_prog_array_delete_safe(struct bpf_prog_array __rcu *progs,
521 struct bpf_prog *old_prog);
522 int bpf_prog_array_copy_info(struct bpf_prog_array __rcu *array,
523 u32 *prog_ids, u32 request_cnt,
525 int bpf_prog_array_copy(struct bpf_prog_array __rcu *old_array,
526 struct bpf_prog *exclude_prog,
527 struct bpf_prog *include_prog,
528 struct bpf_prog_array **new_array);
530 #define __BPF_PROG_RUN_ARRAY(array, ctx, func, check_non_null) \
532 struct bpf_prog_array_item *_item; \
533 struct bpf_prog *_prog; \
534 struct bpf_prog_array *_array; \
538 _array = rcu_dereference(array); \
539 if (unlikely(check_non_null && !_array))\
541 _item = &_array->items[0]; \
542 while ((_prog = READ_ONCE(_item->prog))) { \
543 bpf_cgroup_storage_set(_item->cgroup_storage); \
544 _ret &= func(_prog, ctx); \
553 #define BPF_PROG_RUN_ARRAY(array, ctx, func) \
554 __BPF_PROG_RUN_ARRAY(array, ctx, func, false)
556 #define BPF_PROG_RUN_ARRAY_CHECK(array, ctx, func) \
557 __BPF_PROG_RUN_ARRAY(array, ctx, func, true)
559 #ifdef CONFIG_BPF_SYSCALL
560 DECLARE_PER_CPU(int, bpf_prog_active);
562 extern const struct file_operations bpf_map_fops;
563 extern const struct file_operations bpf_prog_fops;
565 #define BPF_PROG_TYPE(_id, _name) \
566 extern const struct bpf_prog_ops _name ## _prog_ops; \
567 extern const struct bpf_verifier_ops _name ## _verifier_ops;
568 #define BPF_MAP_TYPE(_id, _ops) \
569 extern const struct bpf_map_ops _ops;
570 #include <linux/bpf_types.h>
574 extern const struct bpf_prog_ops bpf_offload_prog_ops;
575 extern const struct bpf_verifier_ops tc_cls_act_analyzer_ops;
576 extern const struct bpf_verifier_ops xdp_analyzer_ops;
578 struct bpf_prog *bpf_prog_get(u32 ufd);
579 struct bpf_prog *bpf_prog_get_type_dev(u32 ufd, enum bpf_prog_type type,
581 struct bpf_prog * __must_check bpf_prog_add(struct bpf_prog *prog, int i);
582 void bpf_prog_sub(struct bpf_prog *prog, int i);
583 struct bpf_prog * __must_check bpf_prog_inc(struct bpf_prog *prog);
584 struct bpf_prog * __must_check bpf_prog_inc_not_zero(struct bpf_prog *prog);
585 void bpf_prog_put(struct bpf_prog *prog);
586 int __bpf_prog_charge(struct user_struct *user, u32 pages);
587 void __bpf_prog_uncharge(struct user_struct *user, u32 pages);
589 void bpf_prog_free_id(struct bpf_prog *prog, bool do_idr_lock);
590 void bpf_map_free_id(struct bpf_map *map, bool do_idr_lock);
592 struct bpf_map *bpf_map_get_with_uref(u32 ufd);
593 struct bpf_map *__bpf_map_get(struct fd f);
594 struct bpf_map * __must_check bpf_map_inc(struct bpf_map *map, bool uref);
595 void bpf_map_put_with_uref(struct bpf_map *map);
596 void bpf_map_put(struct bpf_map *map);
597 int bpf_map_precharge_memlock(u32 pages);
598 int bpf_map_charge_memlock(struct bpf_map *map, u32 pages);
599 void bpf_map_uncharge_memlock(struct bpf_map *map, u32 pages);
600 void *bpf_map_area_alloc(size_t size, int numa_node);
601 void bpf_map_area_free(void *base);
602 void bpf_map_init_from_attr(struct bpf_map *map, union bpf_attr *attr);
604 extern int sysctl_unprivileged_bpf_disabled;
605 extern int sysctl_bpf_stats_enabled;
607 int bpf_map_new_fd(struct bpf_map *map, int flags);
608 int bpf_prog_new_fd(struct bpf_prog *prog);
610 int bpf_obj_pin_user(u32 ufd, const char __user *pathname);
611 int bpf_obj_get_user(const char __user *pathname, int flags);
613 int bpf_percpu_hash_copy(struct bpf_map *map, void *key, void *value);
614 int bpf_percpu_array_copy(struct bpf_map *map, void *key, void *value);
615 int bpf_percpu_hash_update(struct bpf_map *map, void *key, void *value,
617 int bpf_percpu_array_update(struct bpf_map *map, void *key, void *value,
620 int bpf_stackmap_copy(struct bpf_map *map, void *key, void *value);
622 int bpf_fd_array_map_update_elem(struct bpf_map *map, struct file *map_file,
623 void *key, void *value, u64 map_flags);
624 int bpf_fd_array_map_lookup_elem(struct bpf_map *map, void *key, u32 *value);
625 int bpf_fd_htab_map_update_elem(struct bpf_map *map, struct file *map_file,
626 void *key, void *value, u64 map_flags);
627 int bpf_fd_htab_map_lookup_elem(struct bpf_map *map, void *key, u32 *value);
629 int bpf_get_file_flag(int flags);
630 int bpf_check_uarg_tail_zero(void __user *uaddr, size_t expected_size,
633 /* memcpy that is used with 8-byte aligned pointers, power-of-8 size and
634 * forced to use 'long' read/writes to try to atomically copy long counters.
635 * Best-effort only. No barriers here, since it _will_ race with concurrent
636 * updates from BPF programs. Called from bpf syscall and mostly used with
637 * size 8 or 16 bytes, so ask compiler to inline it.
639 static inline void bpf_long_memcpy(void *dst, const void *src, u32 size)
641 const long *lsrc = src;
644 size /= sizeof(long);
649 /* verify correctness of eBPF program */
650 int bpf_check(struct bpf_prog **fp, union bpf_attr *attr,
651 union bpf_attr __user *uattr);
652 void bpf_patch_call_args(struct bpf_insn *insn, u32 stack_depth);
658 struct bpf_dtab_netdev *__dev_map_lookup_elem(struct bpf_map *map, u32 key);
659 void __dev_map_insert_ctx(struct bpf_map *map, u32 index);
660 void __dev_map_flush(struct bpf_map *map);
661 int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp,
662 struct net_device *dev_rx);
663 int dev_map_generic_redirect(struct bpf_dtab_netdev *dst, struct sk_buff *skb,
664 struct bpf_prog *xdp_prog);
666 struct bpf_cpu_map_entry *__cpu_map_lookup_elem(struct bpf_map *map, u32 key);
667 void __cpu_map_insert_ctx(struct bpf_map *map, u32 index);
668 void __cpu_map_flush(struct bpf_map *map);
669 int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu, struct xdp_buff *xdp,
670 struct net_device *dev_rx);
672 /* Return map's numa specified by userspace */
673 static inline int bpf_map_attr_numa_node(const union bpf_attr *attr)
675 return (attr->map_flags & BPF_F_NUMA_NODE) ?
676 attr->numa_node : NUMA_NO_NODE;
679 struct bpf_prog *bpf_prog_get_type_path(const char *name, enum bpf_prog_type type);
680 int array_map_alloc_check(union bpf_attr *attr);
682 int bpf_prog_test_run_xdp(struct bpf_prog *prog, const union bpf_attr *kattr,
683 union bpf_attr __user *uattr);
684 int bpf_prog_test_run_skb(struct bpf_prog *prog, const union bpf_attr *kattr,
685 union bpf_attr __user *uattr);
686 int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog,
687 const union bpf_attr *kattr,
688 union bpf_attr __user *uattr);
689 #else /* !CONFIG_BPF_SYSCALL */
690 static inline struct bpf_prog *bpf_prog_get(u32 ufd)
692 return ERR_PTR(-EOPNOTSUPP);
695 static inline struct bpf_prog *bpf_prog_get_type_dev(u32 ufd,
696 enum bpf_prog_type type,
699 return ERR_PTR(-EOPNOTSUPP);
702 static inline struct bpf_prog * __must_check bpf_prog_add(struct bpf_prog *prog,
705 return ERR_PTR(-EOPNOTSUPP);
708 static inline void bpf_prog_sub(struct bpf_prog *prog, int i)
712 static inline void bpf_prog_put(struct bpf_prog *prog)
716 static inline struct bpf_prog * __must_check bpf_prog_inc(struct bpf_prog *prog)
718 return ERR_PTR(-EOPNOTSUPP);
721 static inline struct bpf_prog *__must_check
722 bpf_prog_inc_not_zero(struct bpf_prog *prog)
724 return ERR_PTR(-EOPNOTSUPP);
727 static inline int __bpf_prog_charge(struct user_struct *user, u32 pages)
732 static inline void __bpf_prog_uncharge(struct user_struct *user, u32 pages)
736 static inline int bpf_obj_get_user(const char __user *pathname, int flags)
741 static inline struct net_device *__dev_map_lookup_elem(struct bpf_map *map,
747 static inline void __dev_map_insert_ctx(struct bpf_map *map, u32 index)
751 static inline void __dev_map_flush(struct bpf_map *map)
756 struct bpf_dtab_netdev;
759 int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp,
760 struct net_device *dev_rx)
767 static inline int dev_map_generic_redirect(struct bpf_dtab_netdev *dst,
769 struct bpf_prog *xdp_prog)
775 struct bpf_cpu_map_entry *__cpu_map_lookup_elem(struct bpf_map *map, u32 key)
780 static inline void __cpu_map_insert_ctx(struct bpf_map *map, u32 index)
784 static inline void __cpu_map_flush(struct bpf_map *map)
788 static inline int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu,
789 struct xdp_buff *xdp,
790 struct net_device *dev_rx)
795 static inline struct bpf_prog *bpf_prog_get_type_path(const char *name,
796 enum bpf_prog_type type)
798 return ERR_PTR(-EOPNOTSUPP);
801 static inline int bpf_prog_test_run_xdp(struct bpf_prog *prog,
802 const union bpf_attr *kattr,
803 union bpf_attr __user *uattr)
808 static inline int bpf_prog_test_run_skb(struct bpf_prog *prog,
809 const union bpf_attr *kattr,
810 union bpf_attr __user *uattr)
815 static inline int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog,
816 const union bpf_attr *kattr,
817 union bpf_attr __user *uattr)
821 #endif /* CONFIG_BPF_SYSCALL */
823 static inline struct bpf_prog *bpf_prog_get_type(u32 ufd,
824 enum bpf_prog_type type)
826 return bpf_prog_get_type_dev(ufd, type, false);
829 bool bpf_prog_get_ok(struct bpf_prog *, enum bpf_prog_type *, bool);
831 int bpf_prog_offload_compile(struct bpf_prog *prog);
832 void bpf_prog_offload_destroy(struct bpf_prog *prog);
833 int bpf_prog_offload_info_fill(struct bpf_prog_info *info,
834 struct bpf_prog *prog);
836 int bpf_map_offload_info_fill(struct bpf_map_info *info, struct bpf_map *map);
838 int bpf_map_offload_lookup_elem(struct bpf_map *map, void *key, void *value);
839 int bpf_map_offload_update_elem(struct bpf_map *map,
840 void *key, void *value, u64 flags);
841 int bpf_map_offload_delete_elem(struct bpf_map *map, void *key);
842 int bpf_map_offload_get_next_key(struct bpf_map *map,
843 void *key, void *next_key);
845 bool bpf_offload_prog_map_match(struct bpf_prog *prog, struct bpf_map *map);
847 struct bpf_offload_dev *
848 bpf_offload_dev_create(const struct bpf_prog_offload_ops *ops, void *priv);
849 void bpf_offload_dev_destroy(struct bpf_offload_dev *offdev);
850 void *bpf_offload_dev_priv(struct bpf_offload_dev *offdev);
851 int bpf_offload_dev_netdev_register(struct bpf_offload_dev *offdev,
852 struct net_device *netdev);
853 void bpf_offload_dev_netdev_unregister(struct bpf_offload_dev *offdev,
854 struct net_device *netdev);
855 bool bpf_offload_dev_match(struct bpf_prog *prog, struct net_device *netdev);
857 #if defined(CONFIG_NET) && defined(CONFIG_BPF_SYSCALL)
858 int bpf_prog_offload_init(struct bpf_prog *prog, union bpf_attr *attr);
860 static inline bool bpf_prog_is_dev_bound(const struct bpf_prog_aux *aux)
862 return aux->offload_requested;
865 static inline bool bpf_map_is_dev_bound(struct bpf_map *map)
867 return unlikely(map->ops == &bpf_map_offload_ops);
870 struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr);
871 void bpf_map_offload_map_free(struct bpf_map *map);
873 static inline int bpf_prog_offload_init(struct bpf_prog *prog,
874 union bpf_attr *attr)
879 static inline bool bpf_prog_is_dev_bound(struct bpf_prog_aux *aux)
884 static inline bool bpf_map_is_dev_bound(struct bpf_map *map)
889 static inline struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr)
891 return ERR_PTR(-EOPNOTSUPP);
894 static inline void bpf_map_offload_map_free(struct bpf_map *map)
897 #endif /* CONFIG_NET && CONFIG_BPF_SYSCALL */
899 #if defined(CONFIG_BPF_STREAM_PARSER)
900 int sock_map_prog_update(struct bpf_map *map, struct bpf_prog *prog, u32 which);
901 int sock_map_get_from_fd(const union bpf_attr *attr, struct bpf_prog *prog);
903 static inline int sock_map_prog_update(struct bpf_map *map,
904 struct bpf_prog *prog, u32 which)
909 static inline int sock_map_get_from_fd(const union bpf_attr *attr,
910 struct bpf_prog *prog)
916 #if defined(CONFIG_XDP_SOCKETS)
918 struct xdp_sock *__xsk_map_lookup_elem(struct bpf_map *map, u32 key);
919 int __xsk_map_redirect(struct bpf_map *map, struct xdp_buff *xdp,
920 struct xdp_sock *xs);
921 void __xsk_map_flush(struct bpf_map *map);
924 static inline struct xdp_sock *__xsk_map_lookup_elem(struct bpf_map *map,
930 static inline int __xsk_map_redirect(struct bpf_map *map, struct xdp_buff *xdp,
936 static inline void __xsk_map_flush(struct bpf_map *map)
941 #if defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL)
942 void bpf_sk_reuseport_detach(struct sock *sk);
943 int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map, void *key,
945 int bpf_fd_reuseport_array_update_elem(struct bpf_map *map, void *key,
946 void *value, u64 map_flags);
948 static inline void bpf_sk_reuseport_detach(struct sock *sk)
952 #ifdef CONFIG_BPF_SYSCALL
953 static inline int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map,
954 void *key, void *value)
959 static inline int bpf_fd_reuseport_array_update_elem(struct bpf_map *map,
960 void *key, void *value,
965 #endif /* CONFIG_BPF_SYSCALL */
966 #endif /* defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL) */
968 /* verifier prototypes for helper functions called from eBPF programs */
969 extern const struct bpf_func_proto bpf_map_lookup_elem_proto;
970 extern const struct bpf_func_proto bpf_map_update_elem_proto;
971 extern const struct bpf_func_proto bpf_map_delete_elem_proto;
972 extern const struct bpf_func_proto bpf_map_push_elem_proto;
973 extern const struct bpf_func_proto bpf_map_pop_elem_proto;
974 extern const struct bpf_func_proto bpf_map_peek_elem_proto;
976 extern const struct bpf_func_proto bpf_get_prandom_u32_proto;
977 extern const struct bpf_func_proto bpf_get_smp_processor_id_proto;
978 extern const struct bpf_func_proto bpf_get_numa_node_id_proto;
979 extern const struct bpf_func_proto bpf_tail_call_proto;
980 extern const struct bpf_func_proto bpf_ktime_get_ns_proto;
981 extern const struct bpf_func_proto bpf_get_current_pid_tgid_proto;
982 extern const struct bpf_func_proto bpf_get_current_uid_gid_proto;
983 extern const struct bpf_func_proto bpf_get_current_comm_proto;
984 extern const struct bpf_func_proto bpf_get_stackid_proto;
985 extern const struct bpf_func_proto bpf_get_stack_proto;
986 extern const struct bpf_func_proto bpf_sock_map_update_proto;
987 extern const struct bpf_func_proto bpf_sock_hash_update_proto;
988 extern const struct bpf_func_proto bpf_get_current_cgroup_id_proto;
989 extern const struct bpf_func_proto bpf_msg_redirect_hash_proto;
990 extern const struct bpf_func_proto bpf_msg_redirect_map_proto;
991 extern const struct bpf_func_proto bpf_sk_redirect_hash_proto;
992 extern const struct bpf_func_proto bpf_sk_redirect_map_proto;
993 extern const struct bpf_func_proto bpf_spin_lock_proto;
994 extern const struct bpf_func_proto bpf_spin_unlock_proto;
995 extern const struct bpf_func_proto bpf_get_local_storage_proto;
996 extern const struct bpf_func_proto bpf_strtol_proto;
997 extern const struct bpf_func_proto bpf_strtoul_proto;
999 /* Shared helpers among cBPF and eBPF. */
1000 void bpf_user_rnd_init_once(void);
1001 u64 bpf_user_rnd_u32(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
1003 #if defined(CONFIG_NET)
1004 bool bpf_sock_common_is_valid_access(int off, int size,
1005 enum bpf_access_type type,
1006 struct bpf_insn_access_aux *info);
1007 bool bpf_sock_is_valid_access(int off, int size, enum bpf_access_type type,
1008 struct bpf_insn_access_aux *info);
1009 u32 bpf_sock_convert_ctx_access(enum bpf_access_type type,
1010 const struct bpf_insn *si,
1011 struct bpf_insn *insn_buf,
1012 struct bpf_prog *prog,
1015 static inline bool bpf_sock_common_is_valid_access(int off, int size,
1016 enum bpf_access_type type,
1017 struct bpf_insn_access_aux *info)
1021 static inline bool bpf_sock_is_valid_access(int off, int size,
1022 enum bpf_access_type type,
1023 struct bpf_insn_access_aux *info)
1027 static inline u32 bpf_sock_convert_ctx_access(enum bpf_access_type type,
1028 const struct bpf_insn *si,
1029 struct bpf_insn *insn_buf,
1030 struct bpf_prog *prog,
1038 bool bpf_tcp_sock_is_valid_access(int off, int size, enum bpf_access_type type,
1039 struct bpf_insn_access_aux *info);
1041 u32 bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type,
1042 const struct bpf_insn *si,
1043 struct bpf_insn *insn_buf,
1044 struct bpf_prog *prog,
1047 static inline bool bpf_tcp_sock_is_valid_access(int off, int size,
1048 enum bpf_access_type type,
1049 struct bpf_insn_access_aux *info)
1054 static inline u32 bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type,
1055 const struct bpf_insn *si,
1056 struct bpf_insn *insn_buf,
1057 struct bpf_prog *prog,
1062 #endif /* CONFIG_INET */
1064 #endif /* _LINUX_BPF_H */