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
;
604 int bpf_map_new_fd(struct bpf_map
*map
, int flags
);
605 int bpf_prog_new_fd(struct bpf_prog
*prog
);
607 int bpf_obj_pin_user(u32 ufd
, const char __user
*pathname
);
608 int bpf_obj_get_user(const char __user
*pathname
, int flags
);
610 int bpf_percpu_hash_copy(struct bpf_map
*map
, void *key
, void *value
);
611 int bpf_percpu_array_copy(struct bpf_map
*map
, void *key
, void *value
);
612 int bpf_percpu_hash_update(struct bpf_map
*map
, void *key
, void *value
,
614 int bpf_percpu_array_update(struct bpf_map
*map
, void *key
, void *value
,
617 int bpf_stackmap_copy(struct bpf_map
*map
, void *key
, void *value
);
619 int bpf_fd_array_map_update_elem(struct bpf_map
*map
, struct file
*map_file
,
620 void *key
, void *value
, u64 map_flags
);
621 int bpf_fd_array_map_lookup_elem(struct bpf_map
*map
, void *key
, u32
*value
);
622 int bpf_fd_htab_map_update_elem(struct bpf_map
*map
, struct file
*map_file
,
623 void *key
, void *value
, u64 map_flags
);
624 int bpf_fd_htab_map_lookup_elem(struct bpf_map
*map
, void *key
, u32
*value
);
626 int bpf_get_file_flag(int flags
);
627 int bpf_check_uarg_tail_zero(void __user
*uaddr
, size_t expected_size
,
630 /* memcpy that is used with 8-byte aligned pointers, power-of-8 size and
631 * forced to use 'long' read/writes to try to atomically copy long counters.
632 * Best-effort only. No barriers here, since it _will_ race with concurrent
633 * updates from BPF programs. Called from bpf syscall and mostly used with
634 * size 8 or 16 bytes, so ask compiler to inline it.
636 static inline void bpf_long_memcpy(void *dst
, const void *src
, u32 size
)
638 const long *lsrc
= src
;
641 size
/= sizeof(long);
646 /* verify correctness of eBPF program */
647 int bpf_check(struct bpf_prog
**fp
, union bpf_attr
*attr
,
648 union bpf_attr __user
*uattr
);
649 void bpf_patch_call_args(struct bpf_insn
*insn
, u32 stack_depth
);
655 struct bpf_dtab_netdev
*__dev_map_lookup_elem(struct bpf_map
*map
, u32 key
);
656 void __dev_map_insert_ctx(struct bpf_map
*map
, u32 index
);
657 void __dev_map_flush(struct bpf_map
*map
);
658 int dev_map_enqueue(struct bpf_dtab_netdev
*dst
, struct xdp_buff
*xdp
,
659 struct net_device
*dev_rx
);
660 int dev_map_generic_redirect(struct bpf_dtab_netdev
*dst
, struct sk_buff
*skb
,
661 struct bpf_prog
*xdp_prog
);
663 struct bpf_cpu_map_entry
*__cpu_map_lookup_elem(struct bpf_map
*map
, u32 key
);
664 void __cpu_map_insert_ctx(struct bpf_map
*map
, u32 index
);
665 void __cpu_map_flush(struct bpf_map
*map
);
666 int cpu_map_enqueue(struct bpf_cpu_map_entry
*rcpu
, struct xdp_buff
*xdp
,
667 struct net_device
*dev_rx
);
669 /* Return map's numa specified by userspace */
670 static inline int bpf_map_attr_numa_node(const union bpf_attr
*attr
)
672 return (attr
->map_flags
& BPF_F_NUMA_NODE
) ?
673 attr
->numa_node
: NUMA_NO_NODE
;
676 struct bpf_prog
*bpf_prog_get_type_path(const char *name
, enum bpf_prog_type type
);
677 int array_map_alloc_check(union bpf_attr
*attr
);
679 int bpf_prog_test_run_xdp(struct bpf_prog
*prog
, const union bpf_attr
*kattr
,
680 union bpf_attr __user
*uattr
);
681 int bpf_prog_test_run_skb(struct bpf_prog
*prog
, const union bpf_attr
*kattr
,
682 union bpf_attr __user
*uattr
);
683 int bpf_prog_test_run_flow_dissector(struct bpf_prog
*prog
,
684 const union bpf_attr
*kattr
,
685 union bpf_attr __user
*uattr
);
686 #else /* !CONFIG_BPF_SYSCALL */
687 static inline struct bpf_prog
*bpf_prog_get(u32 ufd
)
689 return ERR_PTR(-EOPNOTSUPP
);
692 static inline struct bpf_prog
*bpf_prog_get_type_dev(u32 ufd
,
693 enum bpf_prog_type type
,
696 return ERR_PTR(-EOPNOTSUPP
);
699 static inline struct bpf_prog
* __must_check
bpf_prog_add(struct bpf_prog
*prog
,
702 return ERR_PTR(-EOPNOTSUPP
);
705 static inline void bpf_prog_sub(struct bpf_prog
*prog
, int i
)
709 static inline void bpf_prog_put(struct bpf_prog
*prog
)
713 static inline struct bpf_prog
* __must_check
bpf_prog_inc(struct bpf_prog
*prog
)
715 return ERR_PTR(-EOPNOTSUPP
);
718 static inline struct bpf_prog
*__must_check
719 bpf_prog_inc_not_zero(struct bpf_prog
*prog
)
721 return ERR_PTR(-EOPNOTSUPP
);
724 static inline int __bpf_prog_charge(struct user_struct
*user
, u32 pages
)
729 static inline void __bpf_prog_uncharge(struct user_struct
*user
, u32 pages
)
733 static inline int bpf_obj_get_user(const char __user
*pathname
, int flags
)
738 static inline struct net_device
*__dev_map_lookup_elem(struct bpf_map
*map
,
744 static inline void __dev_map_insert_ctx(struct bpf_map
*map
, u32 index
)
748 static inline void __dev_map_flush(struct bpf_map
*map
)
753 struct bpf_dtab_netdev
;
756 int dev_map_enqueue(struct bpf_dtab_netdev
*dst
, struct xdp_buff
*xdp
,
757 struct net_device
*dev_rx
)
764 static inline int dev_map_generic_redirect(struct bpf_dtab_netdev
*dst
,
766 struct bpf_prog
*xdp_prog
)
772 struct bpf_cpu_map_entry
*__cpu_map_lookup_elem(struct bpf_map
*map
, u32 key
)
777 static inline void __cpu_map_insert_ctx(struct bpf_map
*map
, u32 index
)
781 static inline void __cpu_map_flush(struct bpf_map
*map
)
785 static inline int cpu_map_enqueue(struct bpf_cpu_map_entry
*rcpu
,
786 struct xdp_buff
*xdp
,
787 struct net_device
*dev_rx
)
792 static inline struct bpf_prog
*bpf_prog_get_type_path(const char *name
,
793 enum bpf_prog_type type
)
795 return ERR_PTR(-EOPNOTSUPP
);
798 static inline int bpf_prog_test_run_xdp(struct bpf_prog
*prog
,
799 const union bpf_attr
*kattr
,
800 union bpf_attr __user
*uattr
)
805 static inline int bpf_prog_test_run_skb(struct bpf_prog
*prog
,
806 const union bpf_attr
*kattr
,
807 union bpf_attr __user
*uattr
)
812 static inline int bpf_prog_test_run_flow_dissector(struct bpf_prog
*prog
,
813 const union bpf_attr
*kattr
,
814 union bpf_attr __user
*uattr
)
818 #endif /* CONFIG_BPF_SYSCALL */
820 static inline struct bpf_prog
*bpf_prog_get_type(u32 ufd
,
821 enum bpf_prog_type type
)
823 return bpf_prog_get_type_dev(ufd
, type
, false);
826 bool bpf_prog_get_ok(struct bpf_prog
*, enum bpf_prog_type
*, bool);
828 int bpf_prog_offload_compile(struct bpf_prog
*prog
);
829 void bpf_prog_offload_destroy(struct bpf_prog
*prog
);
830 int bpf_prog_offload_info_fill(struct bpf_prog_info
*info
,
831 struct bpf_prog
*prog
);
833 int bpf_map_offload_info_fill(struct bpf_map_info
*info
, struct bpf_map
*map
);
835 int bpf_map_offload_lookup_elem(struct bpf_map
*map
, void *key
, void *value
);
836 int bpf_map_offload_update_elem(struct bpf_map
*map
,
837 void *key
, void *value
, u64 flags
);
838 int bpf_map_offload_delete_elem(struct bpf_map
*map
, void *key
);
839 int bpf_map_offload_get_next_key(struct bpf_map
*map
,
840 void *key
, void *next_key
);
842 bool bpf_offload_prog_map_match(struct bpf_prog
*prog
, struct bpf_map
*map
);
844 struct bpf_offload_dev
*
845 bpf_offload_dev_create(const struct bpf_prog_offload_ops
*ops
, void *priv
);
846 void bpf_offload_dev_destroy(struct bpf_offload_dev
*offdev
);
847 void *bpf_offload_dev_priv(struct bpf_offload_dev
*offdev
);
848 int bpf_offload_dev_netdev_register(struct bpf_offload_dev
*offdev
,
849 struct net_device
*netdev
);
850 void bpf_offload_dev_netdev_unregister(struct bpf_offload_dev
*offdev
,
851 struct net_device
*netdev
);
852 bool bpf_offload_dev_match(struct bpf_prog
*prog
, struct net_device
*netdev
);
854 #if defined(CONFIG_NET) && defined(CONFIG_BPF_SYSCALL)
855 int bpf_prog_offload_init(struct bpf_prog
*prog
, union bpf_attr
*attr
);
857 static inline bool bpf_prog_is_dev_bound(const struct bpf_prog_aux
*aux
)
859 return aux
->offload_requested
;
862 static inline bool bpf_map_is_dev_bound(struct bpf_map
*map
)
864 return unlikely(map
->ops
== &bpf_map_offload_ops
);
867 struct bpf_map
*bpf_map_offload_map_alloc(union bpf_attr
*attr
);
868 void bpf_map_offload_map_free(struct bpf_map
*map
);
870 static inline int bpf_prog_offload_init(struct bpf_prog
*prog
,
871 union bpf_attr
*attr
)
876 static inline bool bpf_prog_is_dev_bound(struct bpf_prog_aux
*aux
)
881 static inline bool bpf_map_is_dev_bound(struct bpf_map
*map
)
886 static inline struct bpf_map
*bpf_map_offload_map_alloc(union bpf_attr
*attr
)
888 return ERR_PTR(-EOPNOTSUPP
);
891 static inline void bpf_map_offload_map_free(struct bpf_map
*map
)
894 #endif /* CONFIG_NET && CONFIG_BPF_SYSCALL */
896 #if defined(CONFIG_BPF_STREAM_PARSER)
897 int sock_map_prog_update(struct bpf_map
*map
, struct bpf_prog
*prog
, u32 which
);
898 int sock_map_get_from_fd(const union bpf_attr
*attr
, struct bpf_prog
*prog
);
900 static inline int sock_map_prog_update(struct bpf_map
*map
,
901 struct bpf_prog
*prog
, u32 which
)
906 static inline int sock_map_get_from_fd(const union bpf_attr
*attr
,
907 struct bpf_prog
*prog
)
913 #if defined(CONFIG_XDP_SOCKETS)
915 struct xdp_sock
*__xsk_map_lookup_elem(struct bpf_map
*map
, u32 key
);
916 int __xsk_map_redirect(struct bpf_map
*map
, struct xdp_buff
*xdp
,
917 struct xdp_sock
*xs
);
918 void __xsk_map_flush(struct bpf_map
*map
);
921 static inline struct xdp_sock
*__xsk_map_lookup_elem(struct bpf_map
*map
,
927 static inline int __xsk_map_redirect(struct bpf_map
*map
, struct xdp_buff
*xdp
,
933 static inline void __xsk_map_flush(struct bpf_map
*map
)
938 #if defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL)
939 void bpf_sk_reuseport_detach(struct sock
*sk
);
940 int bpf_fd_reuseport_array_lookup_elem(struct bpf_map
*map
, void *key
,
942 int bpf_fd_reuseport_array_update_elem(struct bpf_map
*map
, void *key
,
943 void *value
, u64 map_flags
);
945 static inline void bpf_sk_reuseport_detach(struct sock
*sk
)
949 #ifdef CONFIG_BPF_SYSCALL
950 static inline int bpf_fd_reuseport_array_lookup_elem(struct bpf_map
*map
,
951 void *key
, void *value
)
956 static inline int bpf_fd_reuseport_array_update_elem(struct bpf_map
*map
,
957 void *key
, void *value
,
962 #endif /* CONFIG_BPF_SYSCALL */
963 #endif /* defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL) */
965 /* verifier prototypes for helper functions called from eBPF programs */
966 extern const struct bpf_func_proto bpf_map_lookup_elem_proto
;
967 extern const struct bpf_func_proto bpf_map_update_elem_proto
;
968 extern const struct bpf_func_proto bpf_map_delete_elem_proto
;
969 extern const struct bpf_func_proto bpf_map_push_elem_proto
;
970 extern const struct bpf_func_proto bpf_map_pop_elem_proto
;
971 extern const struct bpf_func_proto bpf_map_peek_elem_proto
;
973 extern const struct bpf_func_proto bpf_get_prandom_u32_proto
;
974 extern const struct bpf_func_proto bpf_get_smp_processor_id_proto
;
975 extern const struct bpf_func_proto bpf_get_numa_node_id_proto
;
976 extern const struct bpf_func_proto bpf_tail_call_proto
;
977 extern const struct bpf_func_proto bpf_ktime_get_ns_proto
;
978 extern const struct bpf_func_proto bpf_get_current_pid_tgid_proto
;
979 extern const struct bpf_func_proto bpf_get_current_uid_gid_proto
;
980 extern const struct bpf_func_proto bpf_get_current_comm_proto
;
981 extern const struct bpf_func_proto bpf_get_stackid_proto
;
982 extern const struct bpf_func_proto bpf_get_stack_proto
;
983 extern const struct bpf_func_proto bpf_sock_map_update_proto
;
984 extern const struct bpf_func_proto bpf_sock_hash_update_proto
;
985 extern const struct bpf_func_proto bpf_get_current_cgroup_id_proto
;
986 extern const struct bpf_func_proto bpf_msg_redirect_hash_proto
;
987 extern const struct bpf_func_proto bpf_msg_redirect_map_proto
;
988 extern const struct bpf_func_proto bpf_sk_redirect_hash_proto
;
989 extern const struct bpf_func_proto bpf_sk_redirect_map_proto
;
990 extern const struct bpf_func_proto bpf_spin_lock_proto
;
991 extern const struct bpf_func_proto bpf_spin_unlock_proto
;
992 extern const struct bpf_func_proto bpf_get_local_storage_proto
;
993 extern const struct bpf_func_proto bpf_strtol_proto
;
994 extern const struct bpf_func_proto bpf_strtoul_proto
;
996 /* Shared helpers among cBPF and eBPF. */
997 void bpf_user_rnd_init_once(void);
998 u64
bpf_user_rnd_u32(u64 r1
, u64 r2
, u64 r3
, u64 r4
, u64 r5
);
1000 #if defined(CONFIG_NET)
1001 bool bpf_sock_common_is_valid_access(int off
, int size
,
1002 enum bpf_access_type type
,
1003 struct bpf_insn_access_aux
*info
);
1004 bool bpf_sock_is_valid_access(int off
, int size
, enum bpf_access_type type
,
1005 struct bpf_insn_access_aux
*info
);
1006 u32
bpf_sock_convert_ctx_access(enum bpf_access_type type
,
1007 const struct bpf_insn
*si
,
1008 struct bpf_insn
*insn_buf
,
1009 struct bpf_prog
*prog
,
1012 static inline bool bpf_sock_common_is_valid_access(int off
, int size
,
1013 enum bpf_access_type type
,
1014 struct bpf_insn_access_aux
*info
)
1018 static inline bool bpf_sock_is_valid_access(int off
, int size
,
1019 enum bpf_access_type type
,
1020 struct bpf_insn_access_aux
*info
)
1024 static inline u32
bpf_sock_convert_ctx_access(enum bpf_access_type type
,
1025 const struct bpf_insn
*si
,
1026 struct bpf_insn
*insn_buf
,
1027 struct bpf_prog
*prog
,
1035 bool bpf_tcp_sock_is_valid_access(int off
, int size
, enum bpf_access_type type
,
1036 struct bpf_insn_access_aux
*info
);
1038 u32
bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type
,
1039 const struct bpf_insn
*si
,
1040 struct bpf_insn
*insn_buf
,
1041 struct bpf_prog
*prog
,
1044 static inline bool bpf_tcp_sock_is_valid_access(int off
, int size
,
1045 enum bpf_access_type type
,
1046 struct bpf_insn_access_aux
*info
)
1051 static inline u32
bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type
,
1052 const struct bpf_insn
*si
,
1053 struct bpf_insn
*insn_buf
,
1054 struct bpf_prog
*prog
,
1059 #endif /* CONFIG_INET */
1061 #endif /* _LINUX_BPF_H */