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
);
63 /* The first two cachelines with read-mostly members of which some
64 * are also accessed in fast-path (e.g. ops, max_entries).
66 const struct bpf_map_ops
*ops ____cacheline_aligned
;
67 struct bpf_map
*inner_map_meta
;
68 #ifdef CONFIG_SECURITY
71 enum bpf_map_type map_type
;
76 int spin_lock_off
; /* >=0 valid offset, <0 error */
80 u32 btf_value_type_id
;
86 /* The 3rd and 4th cacheline with misc members to avoid false sharing
87 * particularly with refcounting.
89 struct user_struct
*user ____cacheline_aligned
;
92 struct work_struct work
;
93 char name
[BPF_OBJ_NAME_LEN
];
96 static inline bool map_value_has_spin_lock(const struct bpf_map
*map
)
98 return map
->spin_lock_off
>= 0;
101 static inline void check_and_init_map_lock(struct bpf_map
*map
, void *dst
)
103 if (likely(!map_value_has_spin_lock(map
)))
105 *(struct bpf_spin_lock
*)(dst
+ map
->spin_lock_off
) =
106 (struct bpf_spin_lock
){};
109 /* copy everything but bpf_spin_lock */
110 static inline void copy_map_value(struct bpf_map
*map
, void *dst
, void *src
)
112 if (unlikely(map_value_has_spin_lock(map
))) {
113 u32 off
= map
->spin_lock_off
;
115 memcpy(dst
, src
, off
);
116 memcpy(dst
+ off
+ sizeof(struct bpf_spin_lock
),
117 src
+ off
+ sizeof(struct bpf_spin_lock
),
118 map
->value_size
- off
- sizeof(struct bpf_spin_lock
));
120 memcpy(dst
, src
, map
->value_size
);
123 void copy_map_value_locked(struct bpf_map
*map
, void *dst
, void *src
,
126 struct bpf_offload_dev
;
127 struct bpf_offloaded_map
;
129 struct bpf_map_dev_ops
{
130 int (*map_get_next_key
)(struct bpf_offloaded_map
*map
,
131 void *key
, void *next_key
);
132 int (*map_lookup_elem
)(struct bpf_offloaded_map
*map
,
133 void *key
, void *value
);
134 int (*map_update_elem
)(struct bpf_offloaded_map
*map
,
135 void *key
, void *value
, u64 flags
);
136 int (*map_delete_elem
)(struct bpf_offloaded_map
*map
, void *key
);
139 struct bpf_offloaded_map
{
141 struct net_device
*netdev
;
142 const struct bpf_map_dev_ops
*dev_ops
;
144 struct list_head offloads
;
147 static inline struct bpf_offloaded_map
*map_to_offmap(struct bpf_map
*map
)
149 return container_of(map
, struct bpf_offloaded_map
, map
);
152 static inline bool bpf_map_offload_neutral(const struct bpf_map
*map
)
154 return map
->map_type
== BPF_MAP_TYPE_PERF_EVENT_ARRAY
;
157 static inline bool bpf_map_support_seq_show(const struct bpf_map
*map
)
159 return map
->btf
&& map
->ops
->map_seq_show_elem
;
162 int map_check_no_btf(const struct bpf_map
*map
,
163 const struct btf
*btf
,
164 const struct btf_type
*key_type
,
165 const struct btf_type
*value_type
);
167 extern const struct bpf_map_ops bpf_map_offload_ops
;
169 /* function argument constraints */
171 ARG_DONTCARE
= 0, /* unused argument in helper function */
173 /* the following constraints used to prototype
174 * bpf_map_lookup/update/delete_elem() functions
176 ARG_CONST_MAP_PTR
, /* const argument used as pointer to bpf_map */
177 ARG_PTR_TO_MAP_KEY
, /* pointer to stack used as map key */
178 ARG_PTR_TO_MAP_VALUE
, /* pointer to stack used as map value */
179 ARG_PTR_TO_UNINIT_MAP_VALUE
, /* pointer to valid memory used to store a map value */
181 /* the following constraints used to prototype bpf_memcmp() and other
182 * functions that access data on eBPF program stack
184 ARG_PTR_TO_MEM
, /* pointer to valid memory (stack, packet, map value) */
185 ARG_PTR_TO_MEM_OR_NULL
, /* pointer to valid memory or NULL */
186 ARG_PTR_TO_UNINIT_MEM
, /* pointer to memory does not need to be initialized,
187 * helper function must fill all bytes or clear
188 * them in error case.
191 ARG_CONST_SIZE
, /* number of bytes accessed from memory */
192 ARG_CONST_SIZE_OR_ZERO
, /* number of bytes accessed from memory or 0 */
194 ARG_PTR_TO_CTX
, /* pointer to context */
195 ARG_ANYTHING
, /* any (initialized) argument is ok */
196 ARG_PTR_TO_SOCKET
, /* pointer to bpf_sock */
197 ARG_PTR_TO_SPIN_LOCK
, /* pointer to bpf_spin_lock */
198 ARG_PTR_TO_SOCK_COMMON
, /* pointer to sock_common */
201 /* type of values returned from helper functions */
202 enum bpf_return_type
{
203 RET_INTEGER
, /* function returns integer */
204 RET_VOID
, /* function doesn't return anything */
205 RET_PTR_TO_MAP_VALUE
, /* returns a pointer to map elem value */
206 RET_PTR_TO_MAP_VALUE_OR_NULL
, /* returns a pointer to map elem value or NULL */
207 RET_PTR_TO_SOCKET_OR_NULL
, /* returns a pointer to a socket or NULL */
208 RET_PTR_TO_TCP_SOCK_OR_NULL
, /* returns a pointer to a tcp_sock or NULL */
211 /* eBPF function prototype used by verifier to allow BPF_CALLs from eBPF programs
212 * to in-kernel helper functions and for adjusting imm32 field in BPF_CALL
213 * instructions after verifying
215 struct bpf_func_proto
{
216 u64 (*func
)(u64 r1
, u64 r2
, u64 r3
, u64 r4
, u64 r5
);
219 enum bpf_return_type ret_type
;
220 enum bpf_arg_type arg1_type
;
221 enum bpf_arg_type arg2_type
;
222 enum bpf_arg_type arg3_type
;
223 enum bpf_arg_type arg4_type
;
224 enum bpf_arg_type arg5_type
;
227 /* bpf_context is intentionally undefined structure. Pointer to bpf_context is
228 * the first argument to eBPF programs.
229 * For socket filters: 'struct bpf_context *' == 'struct sk_buff *'
233 enum bpf_access_type
{
238 /* types of values stored in eBPF registers */
239 /* Pointer types represent:
242 * pointer + (u16) var
243 * pointer + (u16) var + imm
244 * if (range > 0) then [ptr, ptr + range - off) is safe to access
245 * if (id > 0) means that some 'var' was added
246 * if (off > 0) means that 'imm' was added
249 NOT_INIT
= 0, /* nothing was written into register */
250 SCALAR_VALUE
, /* reg doesn't contain a valid pointer */
251 PTR_TO_CTX
, /* reg points to bpf_context */
252 CONST_PTR_TO_MAP
, /* reg points to struct bpf_map */
253 PTR_TO_MAP_VALUE
, /* reg points to map element value */
254 PTR_TO_MAP_VALUE_OR_NULL
,/* points to map elem value or NULL */
255 PTR_TO_STACK
, /* reg == frame_pointer + offset */
256 PTR_TO_PACKET_META
, /* skb->data - meta_len */
257 PTR_TO_PACKET
, /* reg points to skb->data */
258 PTR_TO_PACKET_END
, /* skb->data + headlen */
259 PTR_TO_FLOW_KEYS
, /* reg points to bpf_flow_keys */
260 PTR_TO_SOCKET
, /* reg points to struct bpf_sock */
261 PTR_TO_SOCKET_OR_NULL
, /* reg points to struct bpf_sock or NULL */
262 PTR_TO_SOCK_COMMON
, /* reg points to sock_common */
263 PTR_TO_SOCK_COMMON_OR_NULL
, /* reg points to sock_common or NULL */
264 PTR_TO_TCP_SOCK
, /* reg points to struct tcp_sock */
265 PTR_TO_TCP_SOCK_OR_NULL
, /* reg points to struct tcp_sock or NULL */
268 /* The information passed from prog-specific *_is_valid_access
269 * back to the verifier.
271 struct bpf_insn_access_aux
{
272 enum bpf_reg_type reg_type
;
277 bpf_ctx_record_field_size(struct bpf_insn_access_aux
*aux
, u32 size
)
279 aux
->ctx_field_size
= size
;
282 struct bpf_prog_ops
{
283 int (*test_run
)(struct bpf_prog
*prog
, const union bpf_attr
*kattr
,
284 union bpf_attr __user
*uattr
);
287 struct bpf_verifier_ops
{
288 /* return eBPF function prototype for verification */
289 const struct bpf_func_proto
*
290 (*get_func_proto
)(enum bpf_func_id func_id
,
291 const struct bpf_prog
*prog
);
293 /* return true if 'size' wide access at offset 'off' within bpf_context
294 * with 'type' (read or write) is allowed
296 bool (*is_valid_access
)(int off
, int size
, enum bpf_access_type type
,
297 const struct bpf_prog
*prog
,
298 struct bpf_insn_access_aux
*info
);
299 int (*gen_prologue
)(struct bpf_insn
*insn
, bool direct_write
,
300 const struct bpf_prog
*prog
);
301 int (*gen_ld_abs
)(const struct bpf_insn
*orig
,
302 struct bpf_insn
*insn_buf
);
303 u32 (*convert_ctx_access
)(enum bpf_access_type type
,
304 const struct bpf_insn
*src
,
305 struct bpf_insn
*dst
,
306 struct bpf_prog
*prog
, u32
*target_size
);
309 struct bpf_prog_offload_ops
{
310 /* verifier basic callbacks */
311 int (*insn_hook
)(struct bpf_verifier_env
*env
,
312 int insn_idx
, int prev_insn_idx
);
313 int (*finalize
)(struct bpf_verifier_env
*env
);
314 /* verifier optimization callbacks (called after .finalize) */
315 int (*replace_insn
)(struct bpf_verifier_env
*env
, u32 off
,
316 struct bpf_insn
*insn
);
317 int (*remove_insns
)(struct bpf_verifier_env
*env
, u32 off
, u32 cnt
);
318 /* program management callbacks */
319 int (*prepare
)(struct bpf_prog
*prog
);
320 int (*translate
)(struct bpf_prog
*prog
);
321 void (*destroy
)(struct bpf_prog
*prog
);
324 struct bpf_prog_offload
{
325 struct bpf_prog
*prog
;
326 struct net_device
*netdev
;
327 struct bpf_offload_dev
*offdev
;
329 struct list_head offloads
;
336 enum bpf_cgroup_storage_type
{
337 BPF_CGROUP_STORAGE_SHARED
,
338 BPF_CGROUP_STORAGE_PERCPU
,
339 __BPF_CGROUP_STORAGE_MAX
342 #define MAX_BPF_CGROUP_STORAGE_TYPE __BPF_CGROUP_STORAGE_MAX
344 struct bpf_prog_stats
{
347 struct u64_stats_sync syncp
;
350 struct bpf_prog_aux
{
357 u32 func_cnt
; /* used by non-func prog as the number of func progs */
358 u32 func_idx
; /* 0 for non-func prog, the index in func array for func prog */
359 bool offload_requested
;
360 struct bpf_prog
**func
;
361 void *jit_data
; /* JIT specific data. arch dependent */
362 struct latch_tree_node ksym_tnode
;
363 struct list_head ksym_lnode
;
364 const struct bpf_prog_ops
*ops
;
365 struct bpf_map
**used_maps
;
366 struct bpf_prog
*prog
;
367 struct user_struct
*user
;
368 u64 load_time
; /* ns since boottime */
369 struct bpf_map
*cgroup_storage
[MAX_BPF_CGROUP_STORAGE_TYPE
];
370 char name
[BPF_OBJ_NAME_LEN
];
371 #ifdef CONFIG_SECURITY
374 struct bpf_prog_offload
*offload
;
376 struct bpf_func_info
*func_info
;
377 /* bpf_line_info loaded from userspace. linfo->insn_off
378 * has the xlated insn offset.
379 * Both the main and sub prog share the same linfo.
380 * The subprog can access its first linfo by
381 * using the linfo_idx.
383 struct bpf_line_info
*linfo
;
384 /* jited_linfo is the jited addr of the linfo. It has a
385 * one to one mapping to linfo:
386 * jited_linfo[i] is the jited addr for the linfo[i]->insn_off.
387 * Both the main and sub prog share the same jited_linfo.
388 * The subprog can access its first jited_linfo by
389 * using the linfo_idx.
394 /* subprog can use linfo_idx to access its first linfo and
396 * main prog always has linfo_idx == 0
399 struct bpf_prog_stats __percpu
*stats
;
401 struct work_struct work
;
410 /* 'ownership' of prog_array is claimed by the first program that
411 * is going to use this map or by the first program which FD is stored
412 * in the map to make sure that all callers and callees have the same
413 * prog_type and JITed flag
415 enum bpf_prog_type owner_prog_type
;
418 char value
[0] __aligned(8);
419 void *ptrs
[0] __aligned(8);
420 void __percpu
*pptrs
[0] __aligned(8);
424 #define MAX_TAIL_CALL_CNT 32
426 struct bpf_event_entry
{
427 struct perf_event
*event
;
428 struct file
*perf_file
;
429 struct file
*map_file
;
433 bool bpf_prog_array_compatible(struct bpf_array
*array
, const struct bpf_prog
*fp
);
434 int bpf_prog_calc_tag(struct bpf_prog
*fp
);
436 const struct bpf_func_proto
*bpf_get_trace_printk_proto(void);
438 typedef unsigned long (*bpf_ctx_copy_t
)(void *dst
, const void *src
,
439 unsigned long off
, unsigned long len
);
440 typedef u32 (*bpf_convert_ctx_access_t
)(enum bpf_access_type type
,
441 const struct bpf_insn
*src
,
442 struct bpf_insn
*dst
,
443 struct bpf_prog
*prog
,
446 u64
bpf_event_output(struct bpf_map
*map
, u64 flags
, void *meta
, u64 meta_size
,
447 void *ctx
, u64 ctx_size
, bpf_ctx_copy_t ctx_copy
);
449 int bpf_prog_test_run_xdp(struct bpf_prog
*prog
, const union bpf_attr
*kattr
,
450 union bpf_attr __user
*uattr
);
451 int bpf_prog_test_run_skb(struct bpf_prog
*prog
, const union bpf_attr
*kattr
,
452 union bpf_attr __user
*uattr
);
453 int bpf_prog_test_run_flow_dissector(struct bpf_prog
*prog
,
454 const union bpf_attr
*kattr
,
455 union bpf_attr __user
*uattr
);
457 /* an array of programs to be executed under rcu_lock.
460 * ret = BPF_PROG_RUN_ARRAY(&bpf_prog_array, ctx, BPF_PROG_RUN);
462 * the structure returned by bpf_prog_array_alloc() should be populated
463 * with program pointers and the last pointer must be NULL.
464 * The user has to keep refcnt on the program and make sure the program
465 * is removed from the array before bpf_prog_put().
466 * The 'struct bpf_prog_array *' should only be replaced with xchg()
467 * since other cpus are walking the array of pointers in parallel.
469 struct bpf_prog_array_item
{
470 struct bpf_prog
*prog
;
471 struct bpf_cgroup_storage
*cgroup_storage
[MAX_BPF_CGROUP_STORAGE_TYPE
];
474 struct bpf_prog_array
{
476 struct bpf_prog_array_item items
[0];
479 struct bpf_prog_array
*bpf_prog_array_alloc(u32 prog_cnt
, gfp_t flags
);
480 void bpf_prog_array_free(struct bpf_prog_array __rcu
*progs
);
481 int bpf_prog_array_length(struct bpf_prog_array __rcu
*progs
);
482 int bpf_prog_array_copy_to_user(struct bpf_prog_array __rcu
*progs
,
483 __u32 __user
*prog_ids
, u32 cnt
);
485 void bpf_prog_array_delete_safe(struct bpf_prog_array __rcu
*progs
,
486 struct bpf_prog
*old_prog
);
487 int bpf_prog_array_copy_info(struct bpf_prog_array __rcu
*array
,
488 u32
*prog_ids
, u32 request_cnt
,
490 int bpf_prog_array_copy(struct bpf_prog_array __rcu
*old_array
,
491 struct bpf_prog
*exclude_prog
,
492 struct bpf_prog
*include_prog
,
493 struct bpf_prog_array
**new_array
);
495 #define __BPF_PROG_RUN_ARRAY(array, ctx, func, check_non_null) \
497 struct bpf_prog_array_item *_item; \
498 struct bpf_prog *_prog; \
499 struct bpf_prog_array *_array; \
503 _array = rcu_dereference(array); \
504 if (unlikely(check_non_null && !_array))\
506 _item = &_array->items[0]; \
507 while ((_prog = READ_ONCE(_item->prog))) { \
508 bpf_cgroup_storage_set(_item->cgroup_storage); \
509 _ret &= func(_prog, ctx); \
514 preempt_enable_no_resched(); \
518 #define BPF_PROG_RUN_ARRAY(array, ctx, func) \
519 __BPF_PROG_RUN_ARRAY(array, ctx, func, false)
521 #define BPF_PROG_RUN_ARRAY_CHECK(array, ctx, func) \
522 __BPF_PROG_RUN_ARRAY(array, ctx, func, true)
524 #ifdef CONFIG_BPF_SYSCALL
525 DECLARE_PER_CPU(int, bpf_prog_active
);
527 extern const struct file_operations bpf_map_fops
;
528 extern const struct file_operations bpf_prog_fops
;
530 #define BPF_PROG_TYPE(_id, _name) \
531 extern const struct bpf_prog_ops _name ## _prog_ops; \
532 extern const struct bpf_verifier_ops _name ## _verifier_ops;
533 #define BPF_MAP_TYPE(_id, _ops) \
534 extern const struct bpf_map_ops _ops;
535 #include <linux/bpf_types.h>
539 extern const struct bpf_prog_ops bpf_offload_prog_ops
;
540 extern const struct bpf_verifier_ops tc_cls_act_analyzer_ops
;
541 extern const struct bpf_verifier_ops xdp_analyzer_ops
;
543 struct bpf_prog
*bpf_prog_get(u32 ufd
);
544 struct bpf_prog
*bpf_prog_get_type_dev(u32 ufd
, enum bpf_prog_type type
,
546 struct bpf_prog
* __must_check
bpf_prog_add(struct bpf_prog
*prog
, int i
);
547 void bpf_prog_sub(struct bpf_prog
*prog
, int i
);
548 struct bpf_prog
* __must_check
bpf_prog_inc(struct bpf_prog
*prog
);
549 struct bpf_prog
* __must_check
bpf_prog_inc_not_zero(struct bpf_prog
*prog
);
550 void bpf_prog_put(struct bpf_prog
*prog
);
551 int __bpf_prog_charge(struct user_struct
*user
, u32 pages
);
552 void __bpf_prog_uncharge(struct user_struct
*user
, u32 pages
);
554 void bpf_prog_free_id(struct bpf_prog
*prog
, bool do_idr_lock
);
555 void bpf_map_free_id(struct bpf_map
*map
, bool do_idr_lock
);
557 struct bpf_map
*bpf_map_get_with_uref(u32 ufd
);
558 struct bpf_map
*__bpf_map_get(struct fd f
);
559 struct bpf_map
* __must_check
bpf_map_inc(struct bpf_map
*map
, bool uref
);
560 void bpf_map_put_with_uref(struct bpf_map
*map
);
561 void bpf_map_put(struct bpf_map
*map
);
562 int bpf_map_precharge_memlock(u32 pages
);
563 int bpf_map_charge_memlock(struct bpf_map
*map
, u32 pages
);
564 void bpf_map_uncharge_memlock(struct bpf_map
*map
, u32 pages
);
565 void *bpf_map_area_alloc(size_t size
, int numa_node
);
566 void bpf_map_area_free(void *base
);
567 void bpf_map_init_from_attr(struct bpf_map
*map
, union bpf_attr
*attr
);
569 extern int sysctl_unprivileged_bpf_disabled
;
570 extern int sysctl_bpf_stats_enabled
;
572 int bpf_map_new_fd(struct bpf_map
*map
, int flags
);
573 int bpf_prog_new_fd(struct bpf_prog
*prog
);
575 int bpf_obj_pin_user(u32 ufd
, const char __user
*pathname
);
576 int bpf_obj_get_user(const char __user
*pathname
, int flags
);
578 int bpf_percpu_hash_copy(struct bpf_map
*map
, void *key
, void *value
);
579 int bpf_percpu_array_copy(struct bpf_map
*map
, void *key
, void *value
);
580 int bpf_percpu_hash_update(struct bpf_map
*map
, void *key
, void *value
,
582 int bpf_percpu_array_update(struct bpf_map
*map
, void *key
, void *value
,
585 int bpf_stackmap_copy(struct bpf_map
*map
, void *key
, void *value
);
587 int bpf_fd_array_map_update_elem(struct bpf_map
*map
, struct file
*map_file
,
588 void *key
, void *value
, u64 map_flags
);
589 int bpf_fd_array_map_lookup_elem(struct bpf_map
*map
, void *key
, u32
*value
);
590 int bpf_fd_htab_map_update_elem(struct bpf_map
*map
, struct file
*map_file
,
591 void *key
, void *value
, u64 map_flags
);
592 int bpf_fd_htab_map_lookup_elem(struct bpf_map
*map
, void *key
, u32
*value
);
594 int bpf_get_file_flag(int flags
);
595 int bpf_check_uarg_tail_zero(void __user
*uaddr
, size_t expected_size
,
598 /* memcpy that is used with 8-byte aligned pointers, power-of-8 size and
599 * forced to use 'long' read/writes to try to atomically copy long counters.
600 * Best-effort only. No barriers here, since it _will_ race with concurrent
601 * updates from BPF programs. Called from bpf syscall and mostly used with
602 * size 8 or 16 bytes, so ask compiler to inline it.
604 static inline void bpf_long_memcpy(void *dst
, const void *src
, u32 size
)
606 const long *lsrc
= src
;
609 size
/= sizeof(long);
614 /* verify correctness of eBPF program */
615 int bpf_check(struct bpf_prog
**fp
, union bpf_attr
*attr
,
616 union bpf_attr __user
*uattr
);
617 void bpf_patch_call_args(struct bpf_insn
*insn
, u32 stack_depth
);
623 struct bpf_dtab_netdev
*__dev_map_lookup_elem(struct bpf_map
*map
, u32 key
);
624 void __dev_map_insert_ctx(struct bpf_map
*map
, u32 index
);
625 void __dev_map_flush(struct bpf_map
*map
);
626 int dev_map_enqueue(struct bpf_dtab_netdev
*dst
, struct xdp_buff
*xdp
,
627 struct net_device
*dev_rx
);
628 int dev_map_generic_redirect(struct bpf_dtab_netdev
*dst
, struct sk_buff
*skb
,
629 struct bpf_prog
*xdp_prog
);
631 struct bpf_cpu_map_entry
*__cpu_map_lookup_elem(struct bpf_map
*map
, u32 key
);
632 void __cpu_map_insert_ctx(struct bpf_map
*map
, u32 index
);
633 void __cpu_map_flush(struct bpf_map
*map
);
634 int cpu_map_enqueue(struct bpf_cpu_map_entry
*rcpu
, struct xdp_buff
*xdp
,
635 struct net_device
*dev_rx
);
637 /* Return map's numa specified by userspace */
638 static inline int bpf_map_attr_numa_node(const union bpf_attr
*attr
)
640 return (attr
->map_flags
& BPF_F_NUMA_NODE
) ?
641 attr
->numa_node
: NUMA_NO_NODE
;
644 struct bpf_prog
*bpf_prog_get_type_path(const char *name
, enum bpf_prog_type type
);
645 int array_map_alloc_check(union bpf_attr
*attr
);
647 #else /* !CONFIG_BPF_SYSCALL */
648 static inline struct bpf_prog
*bpf_prog_get(u32 ufd
)
650 return ERR_PTR(-EOPNOTSUPP
);
653 static inline struct bpf_prog
*bpf_prog_get_type_dev(u32 ufd
,
654 enum bpf_prog_type type
,
657 return ERR_PTR(-EOPNOTSUPP
);
660 static inline struct bpf_prog
* __must_check
bpf_prog_add(struct bpf_prog
*prog
,
663 return ERR_PTR(-EOPNOTSUPP
);
666 static inline void bpf_prog_sub(struct bpf_prog
*prog
, int i
)
670 static inline void bpf_prog_put(struct bpf_prog
*prog
)
674 static inline struct bpf_prog
* __must_check
bpf_prog_inc(struct bpf_prog
*prog
)
676 return ERR_PTR(-EOPNOTSUPP
);
679 static inline struct bpf_prog
*__must_check
680 bpf_prog_inc_not_zero(struct bpf_prog
*prog
)
682 return ERR_PTR(-EOPNOTSUPP
);
685 static inline int __bpf_prog_charge(struct user_struct
*user
, u32 pages
)
690 static inline void __bpf_prog_uncharge(struct user_struct
*user
, u32 pages
)
694 static inline int bpf_obj_get_user(const char __user
*pathname
, int flags
)
699 static inline struct net_device
*__dev_map_lookup_elem(struct bpf_map
*map
,
705 static inline void __dev_map_insert_ctx(struct bpf_map
*map
, u32 index
)
709 static inline void __dev_map_flush(struct bpf_map
*map
)
714 struct bpf_dtab_netdev
;
717 int dev_map_enqueue(struct bpf_dtab_netdev
*dst
, struct xdp_buff
*xdp
,
718 struct net_device
*dev_rx
)
725 static inline int dev_map_generic_redirect(struct bpf_dtab_netdev
*dst
,
727 struct bpf_prog
*xdp_prog
)
733 struct bpf_cpu_map_entry
*__cpu_map_lookup_elem(struct bpf_map
*map
, u32 key
)
738 static inline void __cpu_map_insert_ctx(struct bpf_map
*map
, u32 index
)
742 static inline void __cpu_map_flush(struct bpf_map
*map
)
746 static inline int cpu_map_enqueue(struct bpf_cpu_map_entry
*rcpu
,
747 struct xdp_buff
*xdp
,
748 struct net_device
*dev_rx
)
753 static inline struct bpf_prog
*bpf_prog_get_type_path(const char *name
,
754 enum bpf_prog_type type
)
756 return ERR_PTR(-EOPNOTSUPP
);
758 #endif /* CONFIG_BPF_SYSCALL */
760 static inline struct bpf_prog
*bpf_prog_get_type(u32 ufd
,
761 enum bpf_prog_type type
)
763 return bpf_prog_get_type_dev(ufd
, type
, false);
766 bool bpf_prog_get_ok(struct bpf_prog
*, enum bpf_prog_type
*, bool);
768 int bpf_prog_offload_compile(struct bpf_prog
*prog
);
769 void bpf_prog_offload_destroy(struct bpf_prog
*prog
);
770 int bpf_prog_offload_info_fill(struct bpf_prog_info
*info
,
771 struct bpf_prog
*prog
);
773 int bpf_map_offload_info_fill(struct bpf_map_info
*info
, struct bpf_map
*map
);
775 int bpf_map_offload_lookup_elem(struct bpf_map
*map
, void *key
, void *value
);
776 int bpf_map_offload_update_elem(struct bpf_map
*map
,
777 void *key
, void *value
, u64 flags
);
778 int bpf_map_offload_delete_elem(struct bpf_map
*map
, void *key
);
779 int bpf_map_offload_get_next_key(struct bpf_map
*map
,
780 void *key
, void *next_key
);
782 bool bpf_offload_prog_map_match(struct bpf_prog
*prog
, struct bpf_map
*map
);
784 struct bpf_offload_dev
*
785 bpf_offload_dev_create(const struct bpf_prog_offload_ops
*ops
, void *priv
);
786 void bpf_offload_dev_destroy(struct bpf_offload_dev
*offdev
);
787 void *bpf_offload_dev_priv(struct bpf_offload_dev
*offdev
);
788 int bpf_offload_dev_netdev_register(struct bpf_offload_dev
*offdev
,
789 struct net_device
*netdev
);
790 void bpf_offload_dev_netdev_unregister(struct bpf_offload_dev
*offdev
,
791 struct net_device
*netdev
);
792 bool bpf_offload_dev_match(struct bpf_prog
*prog
, struct net_device
*netdev
);
794 #if defined(CONFIG_NET) && defined(CONFIG_BPF_SYSCALL)
795 int bpf_prog_offload_init(struct bpf_prog
*prog
, union bpf_attr
*attr
);
797 static inline bool bpf_prog_is_dev_bound(const struct bpf_prog_aux
*aux
)
799 return aux
->offload_requested
;
802 static inline bool bpf_map_is_dev_bound(struct bpf_map
*map
)
804 return unlikely(map
->ops
== &bpf_map_offload_ops
);
807 struct bpf_map
*bpf_map_offload_map_alloc(union bpf_attr
*attr
);
808 void bpf_map_offload_map_free(struct bpf_map
*map
);
810 static inline int bpf_prog_offload_init(struct bpf_prog
*prog
,
811 union bpf_attr
*attr
)
816 static inline bool bpf_prog_is_dev_bound(struct bpf_prog_aux
*aux
)
821 static inline bool bpf_map_is_dev_bound(struct bpf_map
*map
)
826 static inline struct bpf_map
*bpf_map_offload_map_alloc(union bpf_attr
*attr
)
828 return ERR_PTR(-EOPNOTSUPP
);
831 static inline void bpf_map_offload_map_free(struct bpf_map
*map
)
834 #endif /* CONFIG_NET && CONFIG_BPF_SYSCALL */
836 #if defined(CONFIG_BPF_STREAM_PARSER)
837 int sock_map_prog_update(struct bpf_map
*map
, struct bpf_prog
*prog
, u32 which
);
838 int sock_map_get_from_fd(const union bpf_attr
*attr
, struct bpf_prog
*prog
);
840 static inline int sock_map_prog_update(struct bpf_map
*map
,
841 struct bpf_prog
*prog
, u32 which
)
846 static inline int sock_map_get_from_fd(const union bpf_attr
*attr
,
847 struct bpf_prog
*prog
)
853 #if defined(CONFIG_XDP_SOCKETS)
855 struct xdp_sock
*__xsk_map_lookup_elem(struct bpf_map
*map
, u32 key
);
856 int __xsk_map_redirect(struct bpf_map
*map
, struct xdp_buff
*xdp
,
857 struct xdp_sock
*xs
);
858 void __xsk_map_flush(struct bpf_map
*map
);
861 static inline struct xdp_sock
*__xsk_map_lookup_elem(struct bpf_map
*map
,
867 static inline int __xsk_map_redirect(struct bpf_map
*map
, struct xdp_buff
*xdp
,
873 static inline void __xsk_map_flush(struct bpf_map
*map
)
878 #if defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL)
879 void bpf_sk_reuseport_detach(struct sock
*sk
);
880 int bpf_fd_reuseport_array_lookup_elem(struct bpf_map
*map
, void *key
,
882 int bpf_fd_reuseport_array_update_elem(struct bpf_map
*map
, void *key
,
883 void *value
, u64 map_flags
);
885 static inline void bpf_sk_reuseport_detach(struct sock
*sk
)
889 #ifdef CONFIG_BPF_SYSCALL
890 static inline int bpf_fd_reuseport_array_lookup_elem(struct bpf_map
*map
,
891 void *key
, void *value
)
896 static inline int bpf_fd_reuseport_array_update_elem(struct bpf_map
*map
,
897 void *key
, void *value
,
902 #endif /* CONFIG_BPF_SYSCALL */
903 #endif /* defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL) */
905 /* verifier prototypes for helper functions called from eBPF programs */
906 extern const struct bpf_func_proto bpf_map_lookup_elem_proto
;
907 extern const struct bpf_func_proto bpf_map_update_elem_proto
;
908 extern const struct bpf_func_proto bpf_map_delete_elem_proto
;
909 extern const struct bpf_func_proto bpf_map_push_elem_proto
;
910 extern const struct bpf_func_proto bpf_map_pop_elem_proto
;
911 extern const struct bpf_func_proto bpf_map_peek_elem_proto
;
913 extern const struct bpf_func_proto bpf_get_prandom_u32_proto
;
914 extern const struct bpf_func_proto bpf_get_smp_processor_id_proto
;
915 extern const struct bpf_func_proto bpf_get_numa_node_id_proto
;
916 extern const struct bpf_func_proto bpf_tail_call_proto
;
917 extern const struct bpf_func_proto bpf_ktime_get_ns_proto
;
918 extern const struct bpf_func_proto bpf_get_current_pid_tgid_proto
;
919 extern const struct bpf_func_proto bpf_get_current_uid_gid_proto
;
920 extern const struct bpf_func_proto bpf_get_current_comm_proto
;
921 extern const struct bpf_func_proto bpf_get_stackid_proto
;
922 extern const struct bpf_func_proto bpf_get_stack_proto
;
923 extern const struct bpf_func_proto bpf_sock_map_update_proto
;
924 extern const struct bpf_func_proto bpf_sock_hash_update_proto
;
925 extern const struct bpf_func_proto bpf_get_current_cgroup_id_proto
;
926 extern const struct bpf_func_proto bpf_msg_redirect_hash_proto
;
927 extern const struct bpf_func_proto bpf_msg_redirect_map_proto
;
928 extern const struct bpf_func_proto bpf_sk_redirect_hash_proto
;
929 extern const struct bpf_func_proto bpf_sk_redirect_map_proto
;
930 extern const struct bpf_func_proto bpf_spin_lock_proto
;
931 extern const struct bpf_func_proto bpf_spin_unlock_proto
;
932 extern const struct bpf_func_proto bpf_get_local_storage_proto
;
934 /* Shared helpers among cBPF and eBPF. */
935 void bpf_user_rnd_init_once(void);
936 u64
bpf_user_rnd_u32(u64 r1
, u64 r2
, u64 r3
, u64 r4
, u64 r5
);
938 #if defined(CONFIG_NET)
939 bool bpf_sock_common_is_valid_access(int off
, int size
,
940 enum bpf_access_type type
,
941 struct bpf_insn_access_aux
*info
);
942 bool bpf_sock_is_valid_access(int off
, int size
, enum bpf_access_type type
,
943 struct bpf_insn_access_aux
*info
);
944 u32
bpf_sock_convert_ctx_access(enum bpf_access_type type
,
945 const struct bpf_insn
*si
,
946 struct bpf_insn
*insn_buf
,
947 struct bpf_prog
*prog
,
950 static inline bool bpf_sock_common_is_valid_access(int off
, int size
,
951 enum bpf_access_type type
,
952 struct bpf_insn_access_aux
*info
)
956 static inline bool bpf_sock_is_valid_access(int off
, int size
,
957 enum bpf_access_type type
,
958 struct bpf_insn_access_aux
*info
)
962 static inline u32
bpf_sock_convert_ctx_access(enum bpf_access_type type
,
963 const struct bpf_insn
*si
,
964 struct bpf_insn
*insn_buf
,
965 struct bpf_prog
*prog
,
973 bool bpf_tcp_sock_is_valid_access(int off
, int size
, enum bpf_access_type type
,
974 struct bpf_insn_access_aux
*info
);
976 u32
bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type
,
977 const struct bpf_insn
*si
,
978 struct bpf_insn
*insn_buf
,
979 struct bpf_prog
*prog
,
982 static inline bool bpf_tcp_sock_is_valid_access(int off
, int size
,
983 enum bpf_access_type type
,
984 struct bpf_insn_access_aux
*info
)
989 static inline u32
bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type
,
990 const struct bpf_insn
*si
,
991 struct bpf_insn
*insn_buf
,
992 struct bpf_prog
*prog
,
997 #endif /* CONFIG_INET */
999 #endif /* _LINUX_BPF_H */