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/mm_types.h>
16 #include <linux/wait.h>
17 #include <linux/u64_stats_sync.h>
18 #include <linux/refcount.h>
19 #include <linux/mutex.h>
20 #include <linux/module.h>
21 #include <linux/kallsyms.h>
22 #include <linux/capability.h>
23 #include <linux/sched/mm.h>
24 #include <linux/slab.h>
26 struct bpf_verifier_env
;
27 struct bpf_verifier_log
;
36 struct exception_table_entry
;
37 struct seq_operations
;
38 struct bpf_iter_aux_info
;
39 struct bpf_local_storage
;
40 struct bpf_local_storage_map
;
44 extern struct idr btf_idr
;
45 extern spinlock_t btf_idr_lock
;
46 extern struct kobject
*btf_kobj
;
48 typedef int (*bpf_iter_init_seq_priv_t
)(void *private_data
,
49 struct bpf_iter_aux_info
*aux
);
50 typedef void (*bpf_iter_fini_seq_priv_t
)(void *private_data
);
51 struct bpf_iter_seq_info
{
52 const struct seq_operations
*seq_ops
;
53 bpf_iter_init_seq_priv_t init_seq_private
;
54 bpf_iter_fini_seq_priv_t fini_seq_private
;
58 /* map is generic key/value storage optionally accesible by eBPF programs */
60 /* funcs callable from userspace (via syscall) */
61 int (*map_alloc_check
)(union bpf_attr
*attr
);
62 struct bpf_map
*(*map_alloc
)(union bpf_attr
*attr
);
63 void (*map_release
)(struct bpf_map
*map
, struct file
*map_file
);
64 void (*map_free
)(struct bpf_map
*map
);
65 int (*map_get_next_key
)(struct bpf_map
*map
, void *key
, void *next_key
);
66 void (*map_release_uref
)(struct bpf_map
*map
);
67 void *(*map_lookup_elem_sys_only
)(struct bpf_map
*map
, void *key
);
68 int (*map_lookup_batch
)(struct bpf_map
*map
, const union bpf_attr
*attr
,
69 union bpf_attr __user
*uattr
);
70 int (*map_lookup_and_delete_batch
)(struct bpf_map
*map
,
71 const union bpf_attr
*attr
,
72 union bpf_attr __user
*uattr
);
73 int (*map_update_batch
)(struct bpf_map
*map
, const union bpf_attr
*attr
,
74 union bpf_attr __user
*uattr
);
75 int (*map_delete_batch
)(struct bpf_map
*map
, const union bpf_attr
*attr
,
76 union bpf_attr __user
*uattr
);
78 /* funcs callable from userspace and from eBPF programs */
79 void *(*map_lookup_elem
)(struct bpf_map
*map
, void *key
);
80 int (*map_update_elem
)(struct bpf_map
*map
, void *key
, void *value
, u64 flags
);
81 int (*map_delete_elem
)(struct bpf_map
*map
, void *key
);
82 int (*map_push_elem
)(struct bpf_map
*map
, void *value
, u64 flags
);
83 int (*map_pop_elem
)(struct bpf_map
*map
, void *value
);
84 int (*map_peek_elem
)(struct bpf_map
*map
, void *value
);
86 /* funcs called by prog_array and perf_event_array map */
87 void *(*map_fd_get_ptr
)(struct bpf_map
*map
, struct file
*map_file
,
89 void (*map_fd_put_ptr
)(void *ptr
);
90 int (*map_gen_lookup
)(struct bpf_map
*map
, struct bpf_insn
*insn_buf
);
91 u32 (*map_fd_sys_lookup_elem
)(void *ptr
);
92 void (*map_seq_show_elem
)(struct bpf_map
*map
, void *key
,
94 int (*map_check_btf
)(const struct bpf_map
*map
,
95 const struct btf
*btf
,
96 const struct btf_type
*key_type
,
97 const struct btf_type
*value_type
);
99 /* Prog poke tracking helpers. */
100 int (*map_poke_track
)(struct bpf_map
*map
, struct bpf_prog_aux
*aux
);
101 void (*map_poke_untrack
)(struct bpf_map
*map
, struct bpf_prog_aux
*aux
);
102 void (*map_poke_run
)(struct bpf_map
*map
, u32 key
, struct bpf_prog
*old
,
103 struct bpf_prog
*new);
105 /* Direct value access helpers. */
106 int (*map_direct_value_addr
)(const struct bpf_map
*map
,
108 int (*map_direct_value_meta
)(const struct bpf_map
*map
,
110 int (*map_mmap
)(struct bpf_map
*map
, struct vm_area_struct
*vma
);
111 __poll_t (*map_poll
)(struct bpf_map
*map
, struct file
*filp
,
112 struct poll_table_struct
*pts
);
114 /* Functions called by bpf_local_storage maps */
115 int (*map_local_storage_charge
)(struct bpf_local_storage_map
*smap
,
116 void *owner
, u32 size
);
117 void (*map_local_storage_uncharge
)(struct bpf_local_storage_map
*smap
,
118 void *owner
, u32 size
);
119 struct bpf_local_storage __rcu
** (*map_owner_storage_ptr
)(void *owner
);
121 /* map_meta_equal must be implemented for maps that can be
122 * used as an inner map. It is a runtime check to ensure
123 * an inner map can be inserted to an outer map.
125 * Some properties of the inner map has been used during the
126 * verification time. When inserting an inner map at the runtime,
127 * map_meta_equal has to ensure the inserting map has the same
128 * properties that the verifier has used earlier.
130 bool (*map_meta_equal
)(const struct bpf_map
*meta0
,
131 const struct bpf_map
*meta1
);
133 /* BTF name and id of struct allocated by map_alloc */
134 const char * const map_btf_name
;
137 /* bpf_iter info used to open a seq_file */
138 const struct bpf_iter_seq_info
*iter_seq_info
;
142 /* The first two cachelines with read-mostly members of which some
143 * are also accessed in fast-path (e.g. ops, max_entries).
145 const struct bpf_map_ops
*ops ____cacheline_aligned
;
146 struct bpf_map
*inner_map_meta
;
147 #ifdef CONFIG_SECURITY
150 enum bpf_map_type map_type
;
155 int spin_lock_off
; /* >=0 valid offset, <0 error */
159 u32 btf_value_type_id
;
161 #ifdef CONFIG_MEMCG_KMEM
162 struct mem_cgroup
*memcg
;
164 char name
[BPF_OBJ_NAME_LEN
];
165 u32 btf_vmlinux_value_type_id
;
167 bool frozen
; /* write-once; write-protected by freeze_mutex */
170 /* The 3rd and 4th cacheline with misc members to avoid false sharing
171 * particularly with refcounting.
173 atomic64_t refcnt ____cacheline_aligned
;
175 struct work_struct work
;
176 struct mutex freeze_mutex
;
177 u64 writecnt
; /* writable mmap cnt; protected by freeze_mutex */
180 static inline bool map_value_has_spin_lock(const struct bpf_map
*map
)
182 return map
->spin_lock_off
>= 0;
185 static inline void check_and_init_map_lock(struct bpf_map
*map
, void *dst
)
187 if (likely(!map_value_has_spin_lock(map
)))
189 *(struct bpf_spin_lock
*)(dst
+ map
->spin_lock_off
) =
190 (struct bpf_spin_lock
){};
193 /* copy everything but bpf_spin_lock */
194 static inline void copy_map_value(struct bpf_map
*map
, void *dst
, void *src
)
196 if (unlikely(map_value_has_spin_lock(map
))) {
197 u32 off
= map
->spin_lock_off
;
199 memcpy(dst
, src
, off
);
200 memcpy(dst
+ off
+ sizeof(struct bpf_spin_lock
),
201 src
+ off
+ sizeof(struct bpf_spin_lock
),
202 map
->value_size
- off
- sizeof(struct bpf_spin_lock
));
204 memcpy(dst
, src
, map
->value_size
);
207 void copy_map_value_locked(struct bpf_map
*map
, void *dst
, void *src
,
209 int bpf_obj_name_cpy(char *dst
, const char *src
, unsigned int size
);
211 struct bpf_offload_dev
;
212 struct bpf_offloaded_map
;
214 struct bpf_map_dev_ops
{
215 int (*map_get_next_key
)(struct bpf_offloaded_map
*map
,
216 void *key
, void *next_key
);
217 int (*map_lookup_elem
)(struct bpf_offloaded_map
*map
,
218 void *key
, void *value
);
219 int (*map_update_elem
)(struct bpf_offloaded_map
*map
,
220 void *key
, void *value
, u64 flags
);
221 int (*map_delete_elem
)(struct bpf_offloaded_map
*map
, void *key
);
224 struct bpf_offloaded_map
{
226 struct net_device
*netdev
;
227 const struct bpf_map_dev_ops
*dev_ops
;
229 struct list_head offloads
;
232 static inline struct bpf_offloaded_map
*map_to_offmap(struct bpf_map
*map
)
234 return container_of(map
, struct bpf_offloaded_map
, map
);
237 static inline bool bpf_map_offload_neutral(const struct bpf_map
*map
)
239 return map
->map_type
== BPF_MAP_TYPE_PERF_EVENT_ARRAY
;
242 static inline bool bpf_map_support_seq_show(const struct bpf_map
*map
)
244 return (map
->btf_value_type_id
|| map
->btf_vmlinux_value_type_id
) &&
245 map
->ops
->map_seq_show_elem
;
248 int map_check_no_btf(const struct bpf_map
*map
,
249 const struct btf
*btf
,
250 const struct btf_type
*key_type
,
251 const struct btf_type
*value_type
);
253 bool bpf_map_meta_equal(const struct bpf_map
*meta0
,
254 const struct bpf_map
*meta1
);
256 extern const struct bpf_map_ops bpf_map_offload_ops
;
258 /* function argument constraints */
260 ARG_DONTCARE
= 0, /* unused argument in helper function */
262 /* the following constraints used to prototype
263 * bpf_map_lookup/update/delete_elem() functions
265 ARG_CONST_MAP_PTR
, /* const argument used as pointer to bpf_map */
266 ARG_PTR_TO_MAP_KEY
, /* pointer to stack used as map key */
267 ARG_PTR_TO_MAP_VALUE
, /* pointer to stack used as map value */
268 ARG_PTR_TO_UNINIT_MAP_VALUE
, /* pointer to valid memory used to store a map value */
269 ARG_PTR_TO_MAP_VALUE_OR_NULL
, /* pointer to stack used as map value or NULL */
271 /* the following constraints used to prototype bpf_memcmp() and other
272 * functions that access data on eBPF program stack
274 ARG_PTR_TO_MEM
, /* pointer to valid memory (stack, packet, map value) */
275 ARG_PTR_TO_MEM_OR_NULL
, /* pointer to valid memory or NULL */
276 ARG_PTR_TO_UNINIT_MEM
, /* pointer to memory does not need to be initialized,
277 * helper function must fill all bytes or clear
278 * them in error case.
281 ARG_CONST_SIZE
, /* number of bytes accessed from memory */
282 ARG_CONST_SIZE_OR_ZERO
, /* number of bytes accessed from memory or 0 */
284 ARG_PTR_TO_CTX
, /* pointer to context */
285 ARG_PTR_TO_CTX_OR_NULL
, /* pointer to context or NULL */
286 ARG_ANYTHING
, /* any (initialized) argument is ok */
287 ARG_PTR_TO_SPIN_LOCK
, /* pointer to bpf_spin_lock */
288 ARG_PTR_TO_SOCK_COMMON
, /* pointer to sock_common */
289 ARG_PTR_TO_INT
, /* pointer to int */
290 ARG_PTR_TO_LONG
, /* pointer to long */
291 ARG_PTR_TO_SOCKET
, /* pointer to bpf_sock (fullsock) */
292 ARG_PTR_TO_SOCKET_OR_NULL
, /* pointer to bpf_sock (fullsock) or NULL */
293 ARG_PTR_TO_BTF_ID
, /* pointer to in-kernel struct */
294 ARG_PTR_TO_ALLOC_MEM
, /* pointer to dynamically allocated memory */
295 ARG_PTR_TO_ALLOC_MEM_OR_NULL
, /* pointer to dynamically allocated memory or NULL */
296 ARG_CONST_ALLOC_SIZE_OR_ZERO
, /* number of allocated bytes requested */
297 ARG_PTR_TO_BTF_ID_SOCK_COMMON
, /* pointer to in-kernel sock_common or bpf-mirrored bpf_sock */
298 ARG_PTR_TO_PERCPU_BTF_ID
, /* pointer to in-kernel percpu type */
302 /* type of values returned from helper functions */
303 enum bpf_return_type
{
304 RET_INTEGER
, /* function returns integer */
305 RET_VOID
, /* function doesn't return anything */
306 RET_PTR_TO_MAP_VALUE
, /* returns a pointer to map elem value */
307 RET_PTR_TO_MAP_VALUE_OR_NULL
, /* returns a pointer to map elem value or NULL */
308 RET_PTR_TO_SOCKET_OR_NULL
, /* returns a pointer to a socket or NULL */
309 RET_PTR_TO_TCP_SOCK_OR_NULL
, /* returns a pointer to a tcp_sock or NULL */
310 RET_PTR_TO_SOCK_COMMON_OR_NULL
, /* returns a pointer to a sock_common or NULL */
311 RET_PTR_TO_ALLOC_MEM_OR_NULL
, /* returns a pointer to dynamically allocated memory or NULL */
312 RET_PTR_TO_BTF_ID_OR_NULL
, /* returns a pointer to a btf_id or NULL */
313 RET_PTR_TO_MEM_OR_BTF_ID_OR_NULL
, /* returns a pointer to a valid memory or a btf_id or NULL */
314 RET_PTR_TO_MEM_OR_BTF_ID
, /* returns a pointer to a valid memory or a btf_id */
315 RET_PTR_TO_BTF_ID
, /* returns a pointer to a btf_id */
318 /* eBPF function prototype used by verifier to allow BPF_CALLs from eBPF programs
319 * to in-kernel helper functions and for adjusting imm32 field in BPF_CALL
320 * instructions after verifying
322 struct bpf_func_proto
{
323 u64 (*func
)(u64 r1
, u64 r2
, u64 r3
, u64 r4
, u64 r5
);
326 enum bpf_return_type ret_type
;
329 enum bpf_arg_type arg1_type
;
330 enum bpf_arg_type arg2_type
;
331 enum bpf_arg_type arg3_type
;
332 enum bpf_arg_type arg4_type
;
333 enum bpf_arg_type arg5_type
;
335 enum bpf_arg_type arg_type
[5];
347 int *ret_btf_id
; /* return value btf_id */
348 bool (*allowed
)(const struct bpf_prog
*prog
);
351 /* bpf_context is intentionally undefined structure. Pointer to bpf_context is
352 * the first argument to eBPF programs.
353 * For socket filters: 'struct bpf_context *' == 'struct sk_buff *'
357 enum bpf_access_type
{
362 /* types of values stored in eBPF registers */
363 /* Pointer types represent:
366 * pointer + (u16) var
367 * pointer + (u16) var + imm
368 * if (range > 0) then [ptr, ptr + range - off) is safe to access
369 * if (id > 0) means that some 'var' was added
370 * if (off > 0) means that 'imm' was added
373 NOT_INIT
= 0, /* nothing was written into register */
374 SCALAR_VALUE
, /* reg doesn't contain a valid pointer */
375 PTR_TO_CTX
, /* reg points to bpf_context */
376 CONST_PTR_TO_MAP
, /* reg points to struct bpf_map */
377 PTR_TO_MAP_VALUE
, /* reg points to map element value */
378 PTR_TO_MAP_VALUE_OR_NULL
,/* points to map elem value or NULL */
379 PTR_TO_STACK
, /* reg == frame_pointer + offset */
380 PTR_TO_PACKET_META
, /* skb->data - meta_len */
381 PTR_TO_PACKET
, /* reg points to skb->data */
382 PTR_TO_PACKET_END
, /* skb->data + headlen */
383 PTR_TO_FLOW_KEYS
, /* reg points to bpf_flow_keys */
384 PTR_TO_SOCKET
, /* reg points to struct bpf_sock */
385 PTR_TO_SOCKET_OR_NULL
, /* reg points to struct bpf_sock or NULL */
386 PTR_TO_SOCK_COMMON
, /* reg points to sock_common */
387 PTR_TO_SOCK_COMMON_OR_NULL
, /* reg points to sock_common or NULL */
388 PTR_TO_TCP_SOCK
, /* reg points to struct tcp_sock */
389 PTR_TO_TCP_SOCK_OR_NULL
, /* reg points to struct tcp_sock or NULL */
390 PTR_TO_TP_BUFFER
, /* reg points to a writable raw tp's buffer */
391 PTR_TO_XDP_SOCK
, /* reg points to struct xdp_sock */
392 /* PTR_TO_BTF_ID points to a kernel struct that does not need
393 * to be null checked by the BPF program. This does not imply the
394 * pointer is _not_ null and in practice this can easily be a null
395 * pointer when reading pointer chains. The assumption is program
396 * context will handle null pointer dereference typically via fault
397 * handling. The verifier must keep this in mind and can make no
398 * assumptions about null or non-null when doing branch analysis.
399 * Further, when passed into helpers the helpers can not, without
400 * additional context, assume the value is non-null.
403 /* PTR_TO_BTF_ID_OR_NULL points to a kernel struct that has not
404 * been checked for null. Used primarily to inform the verifier
405 * an explicit null check is required for this struct.
407 PTR_TO_BTF_ID_OR_NULL
,
408 PTR_TO_MEM
, /* reg points to valid memory region */
409 PTR_TO_MEM_OR_NULL
, /* reg points to valid memory region or NULL */
410 PTR_TO_RDONLY_BUF
, /* reg points to a readonly buffer */
411 PTR_TO_RDONLY_BUF_OR_NULL
, /* reg points to a readonly buffer or NULL */
412 PTR_TO_RDWR_BUF
, /* reg points to a read/write buffer */
413 PTR_TO_RDWR_BUF_OR_NULL
, /* reg points to a read/write buffer or NULL */
414 PTR_TO_PERCPU_BTF_ID
, /* reg points to a percpu kernel variable */
417 /* The information passed from prog-specific *_is_valid_access
418 * back to the verifier.
420 struct bpf_insn_access_aux
{
421 enum bpf_reg_type reg_type
;
429 struct bpf_verifier_log
*log
; /* for verbose logs */
433 bpf_ctx_record_field_size(struct bpf_insn_access_aux
*aux
, u32 size
)
435 aux
->ctx_field_size
= size
;
438 struct bpf_prog_ops
{
439 int (*test_run
)(struct bpf_prog
*prog
, const union bpf_attr
*kattr
,
440 union bpf_attr __user
*uattr
);
443 struct bpf_verifier_ops
{
444 /* return eBPF function prototype for verification */
445 const struct bpf_func_proto
*
446 (*get_func_proto
)(enum bpf_func_id func_id
,
447 const struct bpf_prog
*prog
);
449 /* return true if 'size' wide access at offset 'off' within bpf_context
450 * with 'type' (read or write) is allowed
452 bool (*is_valid_access
)(int off
, int size
, enum bpf_access_type type
,
453 const struct bpf_prog
*prog
,
454 struct bpf_insn_access_aux
*info
);
455 int (*gen_prologue
)(struct bpf_insn
*insn
, bool direct_write
,
456 const struct bpf_prog
*prog
);
457 int (*gen_ld_abs
)(const struct bpf_insn
*orig
,
458 struct bpf_insn
*insn_buf
);
459 u32 (*convert_ctx_access
)(enum bpf_access_type type
,
460 const struct bpf_insn
*src
,
461 struct bpf_insn
*dst
,
462 struct bpf_prog
*prog
, u32
*target_size
);
463 int (*btf_struct_access
)(struct bpf_verifier_log
*log
,
464 const struct btf
*btf
,
465 const struct btf_type
*t
, int off
, int size
,
466 enum bpf_access_type atype
,
470 struct bpf_prog_offload_ops
{
471 /* verifier basic callbacks */
472 int (*insn_hook
)(struct bpf_verifier_env
*env
,
473 int insn_idx
, int prev_insn_idx
);
474 int (*finalize
)(struct bpf_verifier_env
*env
);
475 /* verifier optimization callbacks (called after .finalize) */
476 int (*replace_insn
)(struct bpf_verifier_env
*env
, u32 off
,
477 struct bpf_insn
*insn
);
478 int (*remove_insns
)(struct bpf_verifier_env
*env
, u32 off
, u32 cnt
);
479 /* program management callbacks */
480 int (*prepare
)(struct bpf_prog
*prog
);
481 int (*translate
)(struct bpf_prog
*prog
);
482 void (*destroy
)(struct bpf_prog
*prog
);
485 struct bpf_prog_offload
{
486 struct bpf_prog
*prog
;
487 struct net_device
*netdev
;
488 struct bpf_offload_dev
*offdev
;
490 struct list_head offloads
;
497 enum bpf_cgroup_storage_type
{
498 BPF_CGROUP_STORAGE_SHARED
,
499 BPF_CGROUP_STORAGE_PERCPU
,
500 __BPF_CGROUP_STORAGE_MAX
503 #define MAX_BPF_CGROUP_STORAGE_TYPE __BPF_CGROUP_STORAGE_MAX
505 /* The longest tracepoint has 12 args.
506 * See include/trace/bpf_probe.h
508 #define MAX_BPF_FUNC_ARGS 12
510 struct bpf_prog_stats
{
513 struct u64_stats_sync syncp
;
514 } __aligned(2 * sizeof(u64
));
516 struct btf_func_model
{
519 u8 arg_size
[MAX_BPF_FUNC_ARGS
];
522 /* Restore arguments before returning from trampoline to let original function
523 * continue executing. This flag is used for fentry progs when there are no
526 #define BPF_TRAMP_F_RESTORE_REGS BIT(0)
527 /* Call original function after fentry progs, but before fexit progs.
528 * Makes sense for fentry/fexit, normal calls and indirect calls.
530 #define BPF_TRAMP_F_CALL_ORIG BIT(1)
531 /* Skip current frame and return to parent. Makes sense for fentry/fexit
532 * programs only. Should not be used with normal calls and indirect calls.
534 #define BPF_TRAMP_F_SKIP_FRAME BIT(2)
536 /* Each call __bpf_prog_enter + call bpf_func + call __bpf_prog_exit is ~50
537 * bytes on x86. Pick a number to fit into BPF_IMAGE_SIZE / 2
539 #define BPF_MAX_TRAMP_PROGS 40
541 struct bpf_tramp_progs
{
542 struct bpf_prog
*progs
[BPF_MAX_TRAMP_PROGS
];
546 /* Different use cases for BPF trampoline:
547 * 1. replace nop at the function entry (kprobe equivalent)
548 * flags = BPF_TRAMP_F_RESTORE_REGS
549 * fentry = a set of programs to run before returning from trampoline
551 * 2. replace nop at the function entry (kprobe + kretprobe equivalent)
552 * flags = BPF_TRAMP_F_CALL_ORIG | BPF_TRAMP_F_SKIP_FRAME
553 * orig_call = fentry_ip + MCOUNT_INSN_SIZE
554 * fentry = a set of program to run before calling original function
555 * fexit = a set of program to run after original function
557 * 3. replace direct call instruction anywhere in the function body
558 * or assign a function pointer for indirect call (like tcp_congestion_ops->cong_avoid)
560 * fentry = a set of programs to run before returning from trampoline
561 * With flags = BPF_TRAMP_F_CALL_ORIG
562 * orig_call = original callback addr or direct function addr
563 * fentry = a set of program to run before calling original function
564 * fexit = a set of program to run after original function
566 int arch_prepare_bpf_trampoline(void *image
, void *image_end
,
567 const struct btf_func_model
*m
, u32 flags
,
568 struct bpf_tramp_progs
*tprogs
,
570 /* these two functions are called from generated trampoline */
571 u64 notrace
__bpf_prog_enter(void);
572 void notrace
__bpf_prog_exit(struct bpf_prog
*prog
, u64 start
);
573 void notrace
__bpf_prog_enter_sleepable(void);
574 void notrace
__bpf_prog_exit_sleepable(void);
579 char name
[KSYM_NAME_LEN
];
580 struct list_head lnode
;
581 struct latch_tree_node tnode
;
585 enum bpf_tramp_prog_type
{
588 BPF_TRAMP_MODIFY_RETURN
,
590 BPF_TRAMP_REPLACE
, /* more than MAX */
593 struct bpf_trampoline
{
594 /* hlist for trampoline_table */
595 struct hlist_node hlist
;
596 /* serializes access to fields of this trampoline */
601 struct btf_func_model model
;
605 /* if !NULL this is BPF_PROG_TYPE_EXT program that extends another BPF
606 * program by replacing one of its functions. func.addr is the address
607 * of the function it replaced.
609 struct bpf_prog
*extension_prog
;
610 /* list of BPF programs using this trampoline */
611 struct hlist_head progs_hlist
[BPF_TRAMP_MAX
];
612 /* Number of attached programs. A counter per kind. */
613 int progs_cnt
[BPF_TRAMP_MAX
];
614 /* Executable image of trampoline */
617 struct bpf_ksym ksym
;
620 struct bpf_attach_target_info
{
621 struct btf_func_model fmodel
;
623 const char *tgt_name
;
624 const struct btf_type
*tgt_type
;
627 #define BPF_DISPATCHER_MAX 48 /* Fits in 2048B */
629 struct bpf_dispatcher_prog
{
630 struct bpf_prog
*prog
;
634 struct bpf_dispatcher
{
635 /* dispatcher mutex */
638 struct bpf_dispatcher_prog progs
[BPF_DISPATCHER_MAX
];
642 struct bpf_ksym ksym
;
645 static __always_inline
unsigned int bpf_dispatcher_nop_func(
647 const struct bpf_insn
*insnsi
,
648 unsigned int (*bpf_func
)(const void *,
649 const struct bpf_insn
*))
651 return bpf_func(ctx
, insnsi
);
653 #ifdef CONFIG_BPF_JIT
654 int bpf_trampoline_link_prog(struct bpf_prog
*prog
, struct bpf_trampoline
*tr
);
655 int bpf_trampoline_unlink_prog(struct bpf_prog
*prog
, struct bpf_trampoline
*tr
);
656 struct bpf_trampoline
*bpf_trampoline_get(u64 key
,
657 struct bpf_attach_target_info
*tgt_info
);
658 void bpf_trampoline_put(struct bpf_trampoline
*tr
);
659 #define BPF_DISPATCHER_INIT(_name) { \
660 .mutex = __MUTEX_INITIALIZER(_name.mutex), \
661 .func = &_name##_func, \
668 .lnode = LIST_HEAD_INIT(_name.ksym.lnode), \
672 #define DEFINE_BPF_DISPATCHER(name) \
673 noinline unsigned int bpf_dispatcher_##name##_func( \
675 const struct bpf_insn *insnsi, \
676 unsigned int (*bpf_func)(const void *, \
677 const struct bpf_insn *)) \
679 return bpf_func(ctx, insnsi); \
681 EXPORT_SYMBOL(bpf_dispatcher_##name##_func); \
682 struct bpf_dispatcher bpf_dispatcher_##name = \
683 BPF_DISPATCHER_INIT(bpf_dispatcher_##name);
684 #define DECLARE_BPF_DISPATCHER(name) \
685 unsigned int bpf_dispatcher_##name##_func( \
687 const struct bpf_insn *insnsi, \
688 unsigned int (*bpf_func)(const void *, \
689 const struct bpf_insn *)); \
690 extern struct bpf_dispatcher bpf_dispatcher_##name;
691 #define BPF_DISPATCHER_FUNC(name) bpf_dispatcher_##name##_func
692 #define BPF_DISPATCHER_PTR(name) (&bpf_dispatcher_##name)
693 void bpf_dispatcher_change_prog(struct bpf_dispatcher
*d
, struct bpf_prog
*from
,
694 struct bpf_prog
*to
);
695 /* Called only from JIT-enabled code, so there's no need for stubs. */
696 void *bpf_jit_alloc_exec_page(void);
697 void bpf_image_ksym_add(void *data
, struct bpf_ksym
*ksym
);
698 void bpf_image_ksym_del(struct bpf_ksym
*ksym
);
699 void bpf_ksym_add(struct bpf_ksym
*ksym
);
700 void bpf_ksym_del(struct bpf_ksym
*ksym
);
702 static inline int bpf_trampoline_link_prog(struct bpf_prog
*prog
,
703 struct bpf_trampoline
*tr
)
707 static inline int bpf_trampoline_unlink_prog(struct bpf_prog
*prog
,
708 struct bpf_trampoline
*tr
)
712 static inline struct bpf_trampoline
*bpf_trampoline_get(u64 key
,
713 struct bpf_attach_target_info
*tgt_info
)
715 return ERR_PTR(-EOPNOTSUPP
);
717 static inline void bpf_trampoline_put(struct bpf_trampoline
*tr
) {}
718 #define DEFINE_BPF_DISPATCHER(name)
719 #define DECLARE_BPF_DISPATCHER(name)
720 #define BPF_DISPATCHER_FUNC(name) bpf_dispatcher_nop_func
721 #define BPF_DISPATCHER_PTR(name) NULL
722 static inline void bpf_dispatcher_change_prog(struct bpf_dispatcher
*d
,
723 struct bpf_prog
*from
,
724 struct bpf_prog
*to
) {}
725 static inline bool is_bpf_image_address(unsigned long address
)
731 struct bpf_func_info_aux
{
736 enum bpf_jit_poke_reason
{
737 BPF_POKE_REASON_TAIL_CALL
,
740 /* Descriptor of pokes pointing /into/ the JITed image. */
741 struct bpf_jit_poke_descriptor
{
742 void *tailcall_target
;
743 void *tailcall_bypass
;
751 bool tailcall_target_stable
;
757 /* reg_type info for ctx arguments */
758 struct bpf_ctx_arg_aux
{
760 enum bpf_reg_type reg_type
;
764 struct bpf_prog_aux
{
772 u32 func_cnt
; /* used by non-func prog as the number of func progs */
773 u32 func_idx
; /* 0 for non-func prog, the index in func array for func prog */
774 u32 attach_btf_id
; /* in-kernel BTF type id to attach to */
775 u32 ctx_arg_info_size
;
776 u32 max_rdonly_access
;
778 struct btf
*attach_btf
;
779 const struct bpf_ctx_arg_aux
*ctx_arg_info
;
780 struct mutex dst_mutex
; /* protects dst_* pointers below, *after* prog becomes visible */
781 struct bpf_prog
*dst_prog
;
782 struct bpf_trampoline
*dst_trampoline
;
783 enum bpf_prog_type saved_dst_prog_type
;
784 enum bpf_attach_type saved_dst_attach_type
;
785 bool verifier_zext
; /* Zero extensions has been inserted by verifier. */
786 bool offload_requested
;
787 bool attach_btf_trace
; /* true if attaching to BTF-enabled raw tp */
788 bool func_proto_unreliable
;
790 bool tail_call_reachable
;
791 enum bpf_tramp_prog_type trampoline_prog_type
;
792 struct hlist_node tramp_hlist
;
793 /* BTF_KIND_FUNC_PROTO for valid attach_btf_id */
794 const struct btf_type
*attach_func_proto
;
795 /* function name for valid attach_btf_id */
796 const char *attach_func_name
;
797 struct bpf_prog
**func
;
798 void *jit_data
; /* JIT specific data. arch dependent */
799 struct bpf_jit_poke_descriptor
*poke_tab
;
801 struct bpf_ksym ksym
;
802 const struct bpf_prog_ops
*ops
;
803 struct bpf_map
**used_maps
;
804 struct mutex used_maps_mutex
; /* mutex for used_maps and used_map_cnt */
805 struct bpf_prog
*prog
;
806 struct user_struct
*user
;
807 u64 load_time
; /* ns since boottime */
808 struct bpf_map
*cgroup_storage
[MAX_BPF_CGROUP_STORAGE_TYPE
];
809 char name
[BPF_OBJ_NAME_LEN
];
810 #ifdef CONFIG_SECURITY
813 struct bpf_prog_offload
*offload
;
815 struct bpf_func_info
*func_info
;
816 struct bpf_func_info_aux
*func_info_aux
;
817 /* bpf_line_info loaded from userspace. linfo->insn_off
818 * has the xlated insn offset.
819 * Both the main and sub prog share the same linfo.
820 * The subprog can access its first linfo by
821 * using the linfo_idx.
823 struct bpf_line_info
*linfo
;
824 /* jited_linfo is the jited addr of the linfo. It has a
825 * one to one mapping to linfo:
826 * jited_linfo[i] is the jited addr for the linfo[i]->insn_off.
827 * Both the main and sub prog share the same jited_linfo.
828 * The subprog can access its first jited_linfo by
829 * using the linfo_idx.
834 /* subprog can use linfo_idx to access its first linfo and
836 * main prog always has linfo_idx == 0
840 struct exception_table_entry
*extable
;
841 struct bpf_prog_stats __percpu
*stats
;
843 struct work_struct work
;
848 struct bpf_array_aux
{
849 /* 'Ownership' of prog array is claimed by the first program that
850 * is going to use this map or by the first program which FD is
851 * stored in the map to make sure that all callers and callees have
852 * the same prog type and JITed flag.
854 enum bpf_prog_type type
;
856 /* Programs with direct jumps into programs part of this array. */
857 struct list_head poke_progs
;
859 struct mutex poke_mutex
;
860 struct work_struct work
;
866 enum bpf_link_type type
;
867 const struct bpf_link_ops
*ops
;
868 struct bpf_prog
*prog
;
869 struct work_struct work
;
872 struct bpf_link_ops
{
873 void (*release
)(struct bpf_link
*link
);
874 void (*dealloc
)(struct bpf_link
*link
);
875 int (*detach
)(struct bpf_link
*link
);
876 int (*update_prog
)(struct bpf_link
*link
, struct bpf_prog
*new_prog
,
877 struct bpf_prog
*old_prog
);
878 void (*show_fdinfo
)(const struct bpf_link
*link
, struct seq_file
*seq
);
879 int (*fill_link_info
)(const struct bpf_link
*link
,
880 struct bpf_link_info
*info
);
883 struct bpf_link_primer
{
884 struct bpf_link
*link
;
890 struct bpf_struct_ops_value
;
894 #define BPF_STRUCT_OPS_MAX_NR_MEMBERS 64
895 struct bpf_struct_ops
{
896 const struct bpf_verifier_ops
*verifier_ops
;
897 int (*init
)(struct btf
*btf
);
898 int (*check_member
)(const struct btf_type
*t
,
899 const struct btf_member
*member
);
900 int (*init_member
)(const struct btf_type
*t
,
901 const struct btf_member
*member
,
902 void *kdata
, const void *udata
);
903 int (*reg
)(void *kdata
);
904 void (*unreg
)(void *kdata
);
905 const struct btf_type
*type
;
906 const struct btf_type
*value_type
;
908 struct btf_func_model func_models
[BPF_STRUCT_OPS_MAX_NR_MEMBERS
];
913 #if defined(CONFIG_BPF_JIT) && defined(CONFIG_BPF_SYSCALL)
914 #define BPF_MODULE_OWNER ((void *)((0xeB9FUL << 2) + POISON_POINTER_DELTA))
915 const struct bpf_struct_ops
*bpf_struct_ops_find(u32 type_id
);
916 void bpf_struct_ops_init(struct btf
*btf
, struct bpf_verifier_log
*log
);
917 bool bpf_struct_ops_get(const void *kdata
);
918 void bpf_struct_ops_put(const void *kdata
);
919 int bpf_struct_ops_map_sys_lookup_elem(struct bpf_map
*map
, void *key
,
921 static inline bool bpf_try_module_get(const void *data
, struct module
*owner
)
923 if (owner
== BPF_MODULE_OWNER
)
924 return bpf_struct_ops_get(data
);
926 return try_module_get(owner
);
928 static inline void bpf_module_put(const void *data
, struct module
*owner
)
930 if (owner
== BPF_MODULE_OWNER
)
931 bpf_struct_ops_put(data
);
936 static inline const struct bpf_struct_ops
*bpf_struct_ops_find(u32 type_id
)
940 static inline void bpf_struct_ops_init(struct btf
*btf
,
941 struct bpf_verifier_log
*log
)
944 static inline bool bpf_try_module_get(const void *data
, struct module
*owner
)
946 return try_module_get(owner
);
948 static inline void bpf_module_put(const void *data
, struct module
*owner
)
952 static inline int bpf_struct_ops_map_sys_lookup_elem(struct bpf_map
*map
,
964 struct bpf_array_aux
*aux
;
966 char value
[0] __aligned(8);
967 void *ptrs
[0] __aligned(8);
968 void __percpu
*pptrs
[0] __aligned(8);
972 #define BPF_COMPLEXITY_LIMIT_INSNS 1000000 /* yes. 1M insns */
973 #define MAX_TAIL_CALL_CNT 32
975 #define BPF_F_ACCESS_MASK (BPF_F_RDONLY | \
976 BPF_F_RDONLY_PROG | \
980 #define BPF_MAP_CAN_READ BIT(0)
981 #define BPF_MAP_CAN_WRITE BIT(1)
983 static inline u32
bpf_map_flags_to_cap(struct bpf_map
*map
)
985 u32 access_flags
= map
->map_flags
& (BPF_F_RDONLY_PROG
| BPF_F_WRONLY_PROG
);
987 /* Combination of BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG is
990 if (access_flags
& BPF_F_RDONLY_PROG
)
991 return BPF_MAP_CAN_READ
;
992 else if (access_flags
& BPF_F_WRONLY_PROG
)
993 return BPF_MAP_CAN_WRITE
;
995 return BPF_MAP_CAN_READ
| BPF_MAP_CAN_WRITE
;
998 static inline bool bpf_map_flags_access_ok(u32 access_flags
)
1000 return (access_flags
& (BPF_F_RDONLY_PROG
| BPF_F_WRONLY_PROG
)) !=
1001 (BPF_F_RDONLY_PROG
| BPF_F_WRONLY_PROG
);
1004 struct bpf_event_entry
{
1005 struct perf_event
*event
;
1006 struct file
*perf_file
;
1007 struct file
*map_file
;
1008 struct rcu_head rcu
;
1011 bool bpf_prog_array_compatible(struct bpf_array
*array
, const struct bpf_prog
*fp
);
1012 int bpf_prog_calc_tag(struct bpf_prog
*fp
);
1014 const struct bpf_func_proto
*bpf_get_trace_printk_proto(void);
1016 typedef unsigned long (*bpf_ctx_copy_t
)(void *dst
, const void *src
,
1017 unsigned long off
, unsigned long len
);
1018 typedef u32 (*bpf_convert_ctx_access_t
)(enum bpf_access_type type
,
1019 const struct bpf_insn
*src
,
1020 struct bpf_insn
*dst
,
1021 struct bpf_prog
*prog
,
1024 u64
bpf_event_output(struct bpf_map
*map
, u64 flags
, void *meta
, u64 meta_size
,
1025 void *ctx
, u64 ctx_size
, bpf_ctx_copy_t ctx_copy
);
1027 /* an array of programs to be executed under rcu_lock.
1030 * ret = BPF_PROG_RUN_ARRAY(&bpf_prog_array, ctx, BPF_PROG_RUN);
1032 * the structure returned by bpf_prog_array_alloc() should be populated
1033 * with program pointers and the last pointer must be NULL.
1034 * The user has to keep refcnt on the program and make sure the program
1035 * is removed from the array before bpf_prog_put().
1036 * The 'struct bpf_prog_array *' should only be replaced with xchg()
1037 * since other cpus are walking the array of pointers in parallel.
1039 struct bpf_prog_array_item
{
1040 struct bpf_prog
*prog
;
1041 struct bpf_cgroup_storage
*cgroup_storage
[MAX_BPF_CGROUP_STORAGE_TYPE
];
1044 struct bpf_prog_array
{
1045 struct rcu_head rcu
;
1046 struct bpf_prog_array_item items
[];
1049 struct bpf_prog_array
*bpf_prog_array_alloc(u32 prog_cnt
, gfp_t flags
);
1050 void bpf_prog_array_free(struct bpf_prog_array
*progs
);
1051 int bpf_prog_array_length(struct bpf_prog_array
*progs
);
1052 bool bpf_prog_array_is_empty(struct bpf_prog_array
*array
);
1053 int bpf_prog_array_copy_to_user(struct bpf_prog_array
*progs
,
1054 __u32 __user
*prog_ids
, u32 cnt
);
1056 void bpf_prog_array_delete_safe(struct bpf_prog_array
*progs
,
1057 struct bpf_prog
*old_prog
);
1058 int bpf_prog_array_delete_safe_at(struct bpf_prog_array
*array
, int index
);
1059 int bpf_prog_array_update_at(struct bpf_prog_array
*array
, int index
,
1060 struct bpf_prog
*prog
);
1061 int bpf_prog_array_copy_info(struct bpf_prog_array
*array
,
1062 u32
*prog_ids
, u32 request_cnt
,
1064 int bpf_prog_array_copy(struct bpf_prog_array
*old_array
,
1065 struct bpf_prog
*exclude_prog
,
1066 struct bpf_prog
*include_prog
,
1067 struct bpf_prog_array
**new_array
);
1069 #define __BPF_PROG_RUN_ARRAY(array, ctx, func, check_non_null) \
1071 struct bpf_prog_array_item *_item; \
1072 struct bpf_prog *_prog; \
1073 struct bpf_prog_array *_array; \
1075 migrate_disable(); \
1077 _array = rcu_dereference(array); \
1078 if (unlikely(check_non_null && !_array))\
1080 _item = &_array->items[0]; \
1081 while ((_prog = READ_ONCE(_item->prog))) { \
1082 bpf_cgroup_storage_set(_item->cgroup_storage); \
1083 _ret &= func(_prog, ctx); \
1087 rcu_read_unlock(); \
1092 /* To be used by __cgroup_bpf_run_filter_skb for EGRESS BPF progs
1093 * so BPF programs can request cwr for TCP packets.
1095 * Current cgroup skb programs can only return 0 or 1 (0 to drop the
1096 * packet. This macro changes the behavior so the low order bit
1097 * indicates whether the packet should be dropped (0) or not (1)
1098 * and the next bit is a congestion notification bit. This could be
1099 * used by TCP to call tcp_enter_cwr()
1101 * Hence, new allowed return values of CGROUP EGRESS BPF programs are:
1104 * 2: drop packet and cn
1105 * 3: keep packet and cn
1107 * This macro then converts it to one of the NET_XMIT or an error
1108 * code that is then interpreted as drop packet (and no cn):
1109 * 0: NET_XMIT_SUCCESS skb should be transmitted
1110 * 1: NET_XMIT_DROP skb should be dropped and cn
1111 * 2: NET_XMIT_CN skb should be transmitted and cn
1112 * 3: -EPERM skb should be dropped
1114 #define BPF_PROG_CGROUP_INET_EGRESS_RUN_ARRAY(array, ctx, func) \
1116 struct bpf_prog_array_item *_item; \
1117 struct bpf_prog *_prog; \
1118 struct bpf_prog_array *_array; \
1122 migrate_disable(); \
1124 _array = rcu_dereference(array); \
1125 _item = &_array->items[0]; \
1126 while ((_prog = READ_ONCE(_item->prog))) { \
1127 bpf_cgroup_storage_set(_item->cgroup_storage); \
1128 ret = func(_prog, ctx); \
1129 _ret &= (ret & 1); \
1133 rcu_read_unlock(); \
1136 _ret = (_cn ? NET_XMIT_CN : NET_XMIT_SUCCESS); \
1138 _ret = (_cn ? NET_XMIT_DROP : -EPERM); \
1142 #define BPF_PROG_RUN_ARRAY(array, ctx, func) \
1143 __BPF_PROG_RUN_ARRAY(array, ctx, func, false)
1145 #define BPF_PROG_RUN_ARRAY_CHECK(array, ctx, func) \
1146 __BPF_PROG_RUN_ARRAY(array, ctx, func, true)
1148 #ifdef CONFIG_BPF_SYSCALL
1149 DECLARE_PER_CPU(int, bpf_prog_active
);
1150 extern struct mutex bpf_stats_enabled_mutex
;
1153 * Block execution of BPF programs attached to instrumentation (perf,
1154 * kprobes, tracepoints) to prevent deadlocks on map operations as any of
1155 * these events can happen inside a region which holds a map bucket lock
1156 * and can deadlock on it.
1158 * Use the preemption safe inc/dec variants on RT because migrate disable
1159 * is preemptible on RT and preemption in the middle of the RMW operation
1160 * might lead to inconsistent state. Use the raw variants for non RT
1161 * kernels as migrate_disable() maps to preempt_disable() so the slightly
1162 * more expensive save operation can be avoided.
1164 static inline void bpf_disable_instrumentation(void)
1167 if (IS_ENABLED(CONFIG_PREEMPT_RT
))
1168 this_cpu_inc(bpf_prog_active
);
1170 __this_cpu_inc(bpf_prog_active
);
1173 static inline void bpf_enable_instrumentation(void)
1175 if (IS_ENABLED(CONFIG_PREEMPT_RT
))
1176 this_cpu_dec(bpf_prog_active
);
1178 __this_cpu_dec(bpf_prog_active
);
1182 extern const struct file_operations bpf_map_fops
;
1183 extern const struct file_operations bpf_prog_fops
;
1184 extern const struct file_operations bpf_iter_fops
;
1186 #define BPF_PROG_TYPE(_id, _name, prog_ctx_type, kern_ctx_type) \
1187 extern const struct bpf_prog_ops _name ## _prog_ops; \
1188 extern const struct bpf_verifier_ops _name ## _verifier_ops;
1189 #define BPF_MAP_TYPE(_id, _ops) \
1190 extern const struct bpf_map_ops _ops;
1191 #define BPF_LINK_TYPE(_id, _name)
1192 #include <linux/bpf_types.h>
1193 #undef BPF_PROG_TYPE
1195 #undef BPF_LINK_TYPE
1197 extern const struct bpf_prog_ops bpf_offload_prog_ops
;
1198 extern const struct bpf_verifier_ops tc_cls_act_analyzer_ops
;
1199 extern const struct bpf_verifier_ops xdp_analyzer_ops
;
1201 struct bpf_prog
*bpf_prog_get(u32 ufd
);
1202 struct bpf_prog
*bpf_prog_get_type_dev(u32 ufd
, enum bpf_prog_type type
,
1204 void bpf_prog_add(struct bpf_prog
*prog
, int i
);
1205 void bpf_prog_sub(struct bpf_prog
*prog
, int i
);
1206 void bpf_prog_inc(struct bpf_prog
*prog
);
1207 struct bpf_prog
* __must_check
bpf_prog_inc_not_zero(struct bpf_prog
*prog
);
1208 void bpf_prog_put(struct bpf_prog
*prog
);
1209 void __bpf_free_used_maps(struct bpf_prog_aux
*aux
,
1210 struct bpf_map
**used_maps
, u32 len
);
1212 void bpf_prog_free_id(struct bpf_prog
*prog
, bool do_idr_lock
);
1213 void bpf_map_free_id(struct bpf_map
*map
, bool do_idr_lock
);
1215 struct bpf_map
*bpf_map_get(u32 ufd
);
1216 struct bpf_map
*bpf_map_get_with_uref(u32 ufd
);
1217 struct bpf_map
*__bpf_map_get(struct fd f
);
1218 void bpf_map_inc(struct bpf_map
*map
);
1219 void bpf_map_inc_with_uref(struct bpf_map
*map
);
1220 struct bpf_map
* __must_check
bpf_map_inc_not_zero(struct bpf_map
*map
);
1221 void bpf_map_put_with_uref(struct bpf_map
*map
);
1222 void bpf_map_put(struct bpf_map
*map
);
1223 void *bpf_map_area_alloc(u64 size
, int numa_node
);
1224 void *bpf_map_area_mmapable_alloc(u64 size
, int numa_node
);
1225 void bpf_map_area_free(void *base
);
1226 void bpf_map_init_from_attr(struct bpf_map
*map
, union bpf_attr
*attr
);
1227 int generic_map_lookup_batch(struct bpf_map
*map
,
1228 const union bpf_attr
*attr
,
1229 union bpf_attr __user
*uattr
);
1230 int generic_map_update_batch(struct bpf_map
*map
,
1231 const union bpf_attr
*attr
,
1232 union bpf_attr __user
*uattr
);
1233 int generic_map_delete_batch(struct bpf_map
*map
,
1234 const union bpf_attr
*attr
,
1235 union bpf_attr __user
*uattr
);
1236 struct bpf_map
*bpf_map_get_curr_or_next(u32
*id
);
1237 struct bpf_prog
*bpf_prog_get_curr_or_next(u32
*id
);
1239 #ifdef CONFIG_MEMCG_KMEM
1240 void *bpf_map_kmalloc_node(const struct bpf_map
*map
, size_t size
, gfp_t flags
,
1242 void *bpf_map_kzalloc(const struct bpf_map
*map
, size_t size
, gfp_t flags
);
1243 void __percpu
*bpf_map_alloc_percpu(const struct bpf_map
*map
, size_t size
,
1244 size_t align
, gfp_t flags
);
1246 static inline void *
1247 bpf_map_kmalloc_node(const struct bpf_map
*map
, size_t size
, gfp_t flags
,
1250 return kmalloc_node(size
, flags
, node
);
1253 static inline void *
1254 bpf_map_kzalloc(const struct bpf_map
*map
, size_t size
, gfp_t flags
)
1256 return kzalloc(size
, flags
);
1259 static inline void __percpu
*
1260 bpf_map_alloc_percpu(const struct bpf_map
*map
, size_t size
, size_t align
,
1263 return __alloc_percpu_gfp(size
, align
, flags
);
1267 extern int sysctl_unprivileged_bpf_disabled
;
1269 static inline bool bpf_allow_ptr_leaks(void)
1271 return perfmon_capable();
1274 static inline bool bpf_allow_ptr_to_map_access(void)
1276 return perfmon_capable();
1279 static inline bool bpf_bypass_spec_v1(void)
1281 return perfmon_capable();
1284 static inline bool bpf_bypass_spec_v4(void)
1286 return perfmon_capable();
1289 int bpf_map_new_fd(struct bpf_map
*map
, int flags
);
1290 int bpf_prog_new_fd(struct bpf_prog
*prog
);
1292 void bpf_link_init(struct bpf_link
*link
, enum bpf_link_type type
,
1293 const struct bpf_link_ops
*ops
, struct bpf_prog
*prog
);
1294 int bpf_link_prime(struct bpf_link
*link
, struct bpf_link_primer
*primer
);
1295 int bpf_link_settle(struct bpf_link_primer
*primer
);
1296 void bpf_link_cleanup(struct bpf_link_primer
*primer
);
1297 void bpf_link_inc(struct bpf_link
*link
);
1298 void bpf_link_put(struct bpf_link
*link
);
1299 int bpf_link_new_fd(struct bpf_link
*link
);
1300 struct file
*bpf_link_new_file(struct bpf_link
*link
, int *reserved_fd
);
1301 struct bpf_link
*bpf_link_get_from_fd(u32 ufd
);
1303 int bpf_obj_pin_user(u32 ufd
, const char __user
*pathname
);
1304 int bpf_obj_get_user(const char __user
*pathname
, int flags
);
1306 #define BPF_ITER_FUNC_PREFIX "bpf_iter_"
1307 #define DEFINE_BPF_ITER_FUNC(target, args...) \
1308 extern int bpf_iter_ ## target(args); \
1309 int __init bpf_iter_ ## target(args) { return 0; }
1311 struct bpf_iter_aux_info
{
1312 struct bpf_map
*map
;
1315 typedef int (*bpf_iter_attach_target_t
)(struct bpf_prog
*prog
,
1316 union bpf_iter_link_info
*linfo
,
1317 struct bpf_iter_aux_info
*aux
);
1318 typedef void (*bpf_iter_detach_target_t
)(struct bpf_iter_aux_info
*aux
);
1319 typedef void (*bpf_iter_show_fdinfo_t
) (const struct bpf_iter_aux_info
*aux
,
1320 struct seq_file
*seq
);
1321 typedef int (*bpf_iter_fill_link_info_t
)(const struct bpf_iter_aux_info
*aux
,
1322 struct bpf_link_info
*info
);
1324 enum bpf_iter_feature
{
1325 BPF_ITER_RESCHED
= BIT(0),
1328 #define BPF_ITER_CTX_ARG_MAX 2
1329 struct bpf_iter_reg
{
1331 bpf_iter_attach_target_t attach_target
;
1332 bpf_iter_detach_target_t detach_target
;
1333 bpf_iter_show_fdinfo_t show_fdinfo
;
1334 bpf_iter_fill_link_info_t fill_link_info
;
1335 u32 ctx_arg_info_size
;
1337 struct bpf_ctx_arg_aux ctx_arg_info
[BPF_ITER_CTX_ARG_MAX
];
1338 const struct bpf_iter_seq_info
*seq_info
;
1341 struct bpf_iter_meta
{
1342 __bpf_md_ptr(struct seq_file
*, seq
);
1347 struct bpf_iter__bpf_map_elem
{
1348 __bpf_md_ptr(struct bpf_iter_meta
*, meta
);
1349 __bpf_md_ptr(struct bpf_map
*, map
);
1350 __bpf_md_ptr(void *, key
);
1351 __bpf_md_ptr(void *, value
);
1354 int bpf_iter_reg_target(const struct bpf_iter_reg
*reg_info
);
1355 void bpf_iter_unreg_target(const struct bpf_iter_reg
*reg_info
);
1356 bool bpf_iter_prog_supported(struct bpf_prog
*prog
);
1357 int bpf_iter_link_attach(const union bpf_attr
*attr
, struct bpf_prog
*prog
);
1358 int bpf_iter_new_fd(struct bpf_link
*link
);
1359 bool bpf_link_is_iter(struct bpf_link
*link
);
1360 struct bpf_prog
*bpf_iter_get_info(struct bpf_iter_meta
*meta
, bool in_stop
);
1361 int bpf_iter_run_prog(struct bpf_prog
*prog
, void *ctx
);
1362 void bpf_iter_map_show_fdinfo(const struct bpf_iter_aux_info
*aux
,
1363 struct seq_file
*seq
);
1364 int bpf_iter_map_fill_link_info(const struct bpf_iter_aux_info
*aux
,
1365 struct bpf_link_info
*info
);
1367 int bpf_percpu_hash_copy(struct bpf_map
*map
, void *key
, void *value
);
1368 int bpf_percpu_array_copy(struct bpf_map
*map
, void *key
, void *value
);
1369 int bpf_percpu_hash_update(struct bpf_map
*map
, void *key
, void *value
,
1371 int bpf_percpu_array_update(struct bpf_map
*map
, void *key
, void *value
,
1374 int bpf_stackmap_copy(struct bpf_map
*map
, void *key
, void *value
);
1376 int bpf_fd_array_map_update_elem(struct bpf_map
*map
, struct file
*map_file
,
1377 void *key
, void *value
, u64 map_flags
);
1378 int bpf_fd_array_map_lookup_elem(struct bpf_map
*map
, void *key
, u32
*value
);
1379 int bpf_fd_htab_map_update_elem(struct bpf_map
*map
, struct file
*map_file
,
1380 void *key
, void *value
, u64 map_flags
);
1381 int bpf_fd_htab_map_lookup_elem(struct bpf_map
*map
, void *key
, u32
*value
);
1383 int bpf_get_file_flag(int flags
);
1384 int bpf_check_uarg_tail_zero(void __user
*uaddr
, size_t expected_size
,
1385 size_t actual_size
);
1387 /* memcpy that is used with 8-byte aligned pointers, power-of-8 size and
1388 * forced to use 'long' read/writes to try to atomically copy long counters.
1389 * Best-effort only. No barriers here, since it _will_ race with concurrent
1390 * updates from BPF programs. Called from bpf syscall and mostly used with
1391 * size 8 or 16 bytes, so ask compiler to inline it.
1393 static inline void bpf_long_memcpy(void *dst
, const void *src
, u32 size
)
1395 const long *lsrc
= src
;
1398 size
/= sizeof(long);
1403 /* verify correctness of eBPF program */
1404 int bpf_check(struct bpf_prog
**fp
, union bpf_attr
*attr
,
1405 union bpf_attr __user
*uattr
);
1406 void bpf_patch_call_args(struct bpf_insn
*insn
, u32 stack_depth
);
1408 struct btf
*bpf_get_btf_vmlinux(void);
1414 struct bpf_dtab_netdev
*__dev_map_lookup_elem(struct bpf_map
*map
, u32 key
);
1415 struct bpf_dtab_netdev
*__dev_map_hash_lookup_elem(struct bpf_map
*map
, u32 key
);
1416 void __dev_flush(void);
1417 int dev_xdp_enqueue(struct net_device
*dev
, struct xdp_buff
*xdp
,
1418 struct net_device
*dev_rx
);
1419 int dev_map_enqueue(struct bpf_dtab_netdev
*dst
, struct xdp_buff
*xdp
,
1420 struct net_device
*dev_rx
);
1421 int dev_map_generic_redirect(struct bpf_dtab_netdev
*dst
, struct sk_buff
*skb
,
1422 struct bpf_prog
*xdp_prog
);
1423 bool dev_map_can_have_prog(struct bpf_map
*map
);
1425 struct bpf_cpu_map_entry
*__cpu_map_lookup_elem(struct bpf_map
*map
, u32 key
);
1426 void __cpu_map_flush(void);
1427 int cpu_map_enqueue(struct bpf_cpu_map_entry
*rcpu
, struct xdp_buff
*xdp
,
1428 struct net_device
*dev_rx
);
1429 bool cpu_map_prog_allowed(struct bpf_map
*map
);
1431 /* Return map's numa specified by userspace */
1432 static inline int bpf_map_attr_numa_node(const union bpf_attr
*attr
)
1434 return (attr
->map_flags
& BPF_F_NUMA_NODE
) ?
1435 attr
->numa_node
: NUMA_NO_NODE
;
1438 struct bpf_prog
*bpf_prog_get_type_path(const char *name
, enum bpf_prog_type type
);
1439 int array_map_alloc_check(union bpf_attr
*attr
);
1441 int bpf_prog_test_run_xdp(struct bpf_prog
*prog
, const union bpf_attr
*kattr
,
1442 union bpf_attr __user
*uattr
);
1443 int bpf_prog_test_run_skb(struct bpf_prog
*prog
, const union bpf_attr
*kattr
,
1444 union bpf_attr __user
*uattr
);
1445 int bpf_prog_test_run_tracing(struct bpf_prog
*prog
,
1446 const union bpf_attr
*kattr
,
1447 union bpf_attr __user
*uattr
);
1448 int bpf_prog_test_run_flow_dissector(struct bpf_prog
*prog
,
1449 const union bpf_attr
*kattr
,
1450 union bpf_attr __user
*uattr
);
1451 int bpf_prog_test_run_raw_tp(struct bpf_prog
*prog
,
1452 const union bpf_attr
*kattr
,
1453 union bpf_attr __user
*uattr
);
1454 bool btf_ctx_access(int off
, int size
, enum bpf_access_type type
,
1455 const struct bpf_prog
*prog
,
1456 struct bpf_insn_access_aux
*info
);
1457 int btf_struct_access(struct bpf_verifier_log
*log
, const struct btf
*btf
,
1458 const struct btf_type
*t
, int off
, int size
,
1459 enum bpf_access_type atype
,
1461 bool btf_struct_ids_match(struct bpf_verifier_log
*log
,
1462 const struct btf
*btf
, u32 id
, int off
,
1463 const struct btf
*need_btf
, u32 need_type_id
);
1465 int btf_distill_func_proto(struct bpf_verifier_log
*log
,
1467 const struct btf_type
*func_proto
,
1468 const char *func_name
,
1469 struct btf_func_model
*m
);
1471 struct bpf_reg_state
;
1472 int btf_check_func_arg_match(struct bpf_verifier_env
*env
, int subprog
,
1473 struct bpf_reg_state
*regs
);
1474 int btf_prepare_func_args(struct bpf_verifier_env
*env
, int subprog
,
1475 struct bpf_reg_state
*reg
);
1476 int btf_check_type_match(struct bpf_verifier_log
*log
, const struct bpf_prog
*prog
,
1477 struct btf
*btf
, const struct btf_type
*t
);
1479 struct bpf_prog
*bpf_prog_by_id(u32 id
);
1480 struct bpf_link
*bpf_link_by_id(u32 id
);
1482 const struct bpf_func_proto
*bpf_base_func_proto(enum bpf_func_id func_id
);
1483 #else /* !CONFIG_BPF_SYSCALL */
1484 static inline struct bpf_prog
*bpf_prog_get(u32 ufd
)
1486 return ERR_PTR(-EOPNOTSUPP
);
1489 static inline struct bpf_prog
*bpf_prog_get_type_dev(u32 ufd
,
1490 enum bpf_prog_type type
,
1493 return ERR_PTR(-EOPNOTSUPP
);
1496 static inline void bpf_prog_add(struct bpf_prog
*prog
, int i
)
1500 static inline void bpf_prog_sub(struct bpf_prog
*prog
, int i
)
1504 static inline void bpf_prog_put(struct bpf_prog
*prog
)
1508 static inline void bpf_prog_inc(struct bpf_prog
*prog
)
1512 static inline struct bpf_prog
*__must_check
1513 bpf_prog_inc_not_zero(struct bpf_prog
*prog
)
1515 return ERR_PTR(-EOPNOTSUPP
);
1518 static inline void bpf_link_init(struct bpf_link
*link
, enum bpf_link_type type
,
1519 const struct bpf_link_ops
*ops
,
1520 struct bpf_prog
*prog
)
1524 static inline int bpf_link_prime(struct bpf_link
*link
,
1525 struct bpf_link_primer
*primer
)
1530 static inline int bpf_link_settle(struct bpf_link_primer
*primer
)
1535 static inline void bpf_link_cleanup(struct bpf_link_primer
*primer
)
1539 static inline void bpf_link_inc(struct bpf_link
*link
)
1543 static inline void bpf_link_put(struct bpf_link
*link
)
1547 static inline int bpf_obj_get_user(const char __user
*pathname
, int flags
)
1552 static inline struct net_device
*__dev_map_lookup_elem(struct bpf_map
*map
,
1558 static inline struct net_device
*__dev_map_hash_lookup_elem(struct bpf_map
*map
,
1563 static inline bool dev_map_can_have_prog(struct bpf_map
*map
)
1568 static inline void __dev_flush(void)
1573 struct bpf_dtab_netdev
;
1576 int dev_xdp_enqueue(struct net_device
*dev
, struct xdp_buff
*xdp
,
1577 struct net_device
*dev_rx
)
1583 int dev_map_enqueue(struct bpf_dtab_netdev
*dst
, struct xdp_buff
*xdp
,
1584 struct net_device
*dev_rx
)
1591 static inline int dev_map_generic_redirect(struct bpf_dtab_netdev
*dst
,
1592 struct sk_buff
*skb
,
1593 struct bpf_prog
*xdp_prog
)
1599 struct bpf_cpu_map_entry
*__cpu_map_lookup_elem(struct bpf_map
*map
, u32 key
)
1604 static inline void __cpu_map_flush(void)
1608 static inline int cpu_map_enqueue(struct bpf_cpu_map_entry
*rcpu
,
1609 struct xdp_buff
*xdp
,
1610 struct net_device
*dev_rx
)
1615 static inline bool cpu_map_prog_allowed(struct bpf_map
*map
)
1620 static inline struct bpf_prog
*bpf_prog_get_type_path(const char *name
,
1621 enum bpf_prog_type type
)
1623 return ERR_PTR(-EOPNOTSUPP
);
1626 static inline int bpf_prog_test_run_xdp(struct bpf_prog
*prog
,
1627 const union bpf_attr
*kattr
,
1628 union bpf_attr __user
*uattr
)
1633 static inline int bpf_prog_test_run_skb(struct bpf_prog
*prog
,
1634 const union bpf_attr
*kattr
,
1635 union bpf_attr __user
*uattr
)
1640 static inline int bpf_prog_test_run_tracing(struct bpf_prog
*prog
,
1641 const union bpf_attr
*kattr
,
1642 union bpf_attr __user
*uattr
)
1647 static inline int bpf_prog_test_run_flow_dissector(struct bpf_prog
*prog
,
1648 const union bpf_attr
*kattr
,
1649 union bpf_attr __user
*uattr
)
1654 static inline void bpf_map_put(struct bpf_map
*map
)
1658 static inline struct bpf_prog
*bpf_prog_by_id(u32 id
)
1660 return ERR_PTR(-ENOTSUPP
);
1663 static inline const struct bpf_func_proto
*
1664 bpf_base_func_proto(enum bpf_func_id func_id
)
1668 #endif /* CONFIG_BPF_SYSCALL */
1670 static inline struct bpf_prog
*bpf_prog_get_type(u32 ufd
,
1671 enum bpf_prog_type type
)
1673 return bpf_prog_get_type_dev(ufd
, type
, false);
1676 bool bpf_prog_get_ok(struct bpf_prog
*, enum bpf_prog_type
*, bool);
1678 int bpf_prog_offload_compile(struct bpf_prog
*prog
);
1679 void bpf_prog_offload_destroy(struct bpf_prog
*prog
);
1680 int bpf_prog_offload_info_fill(struct bpf_prog_info
*info
,
1681 struct bpf_prog
*prog
);
1683 int bpf_map_offload_info_fill(struct bpf_map_info
*info
, struct bpf_map
*map
);
1685 int bpf_map_offload_lookup_elem(struct bpf_map
*map
, void *key
, void *value
);
1686 int bpf_map_offload_update_elem(struct bpf_map
*map
,
1687 void *key
, void *value
, u64 flags
);
1688 int bpf_map_offload_delete_elem(struct bpf_map
*map
, void *key
);
1689 int bpf_map_offload_get_next_key(struct bpf_map
*map
,
1690 void *key
, void *next_key
);
1692 bool bpf_offload_prog_map_match(struct bpf_prog
*prog
, struct bpf_map
*map
);
1694 struct bpf_offload_dev
*
1695 bpf_offload_dev_create(const struct bpf_prog_offload_ops
*ops
, void *priv
);
1696 void bpf_offload_dev_destroy(struct bpf_offload_dev
*offdev
);
1697 void *bpf_offload_dev_priv(struct bpf_offload_dev
*offdev
);
1698 int bpf_offload_dev_netdev_register(struct bpf_offload_dev
*offdev
,
1699 struct net_device
*netdev
);
1700 void bpf_offload_dev_netdev_unregister(struct bpf_offload_dev
*offdev
,
1701 struct net_device
*netdev
);
1702 bool bpf_offload_dev_match(struct bpf_prog
*prog
, struct net_device
*netdev
);
1704 #if defined(CONFIG_NET) && defined(CONFIG_BPF_SYSCALL)
1705 int bpf_prog_offload_init(struct bpf_prog
*prog
, union bpf_attr
*attr
);
1707 static inline bool bpf_prog_is_dev_bound(const struct bpf_prog_aux
*aux
)
1709 return aux
->offload_requested
;
1712 static inline bool bpf_map_is_dev_bound(struct bpf_map
*map
)
1714 return unlikely(map
->ops
== &bpf_map_offload_ops
);
1717 struct bpf_map
*bpf_map_offload_map_alloc(union bpf_attr
*attr
);
1718 void bpf_map_offload_map_free(struct bpf_map
*map
);
1720 static inline int bpf_prog_offload_init(struct bpf_prog
*prog
,
1721 union bpf_attr
*attr
)
1726 static inline bool bpf_prog_is_dev_bound(struct bpf_prog_aux
*aux
)
1731 static inline bool bpf_map_is_dev_bound(struct bpf_map
*map
)
1736 static inline struct bpf_map
*bpf_map_offload_map_alloc(union bpf_attr
*attr
)
1738 return ERR_PTR(-EOPNOTSUPP
);
1741 static inline void bpf_map_offload_map_free(struct bpf_map
*map
)
1744 #endif /* CONFIG_NET && CONFIG_BPF_SYSCALL */
1746 #if defined(CONFIG_BPF_STREAM_PARSER)
1747 int sock_map_prog_update(struct bpf_map
*map
, struct bpf_prog
*prog
,
1748 struct bpf_prog
*old
, u32 which
);
1749 int sock_map_get_from_fd(const union bpf_attr
*attr
, struct bpf_prog
*prog
);
1750 int sock_map_prog_detach(const union bpf_attr
*attr
, enum bpf_prog_type ptype
);
1751 int sock_map_update_elem_sys(struct bpf_map
*map
, void *key
, void *value
, u64 flags
);
1752 void sock_map_unhash(struct sock
*sk
);
1753 void sock_map_close(struct sock
*sk
, long timeout
);
1755 static inline int sock_map_prog_update(struct bpf_map
*map
,
1756 struct bpf_prog
*prog
,
1757 struct bpf_prog
*old
, u32 which
)
1762 static inline int sock_map_get_from_fd(const union bpf_attr
*attr
,
1763 struct bpf_prog
*prog
)
1768 static inline int sock_map_prog_detach(const union bpf_attr
*attr
,
1769 enum bpf_prog_type ptype
)
1774 static inline int sock_map_update_elem_sys(struct bpf_map
*map
, void *key
, void *value
,
1779 #endif /* CONFIG_BPF_STREAM_PARSER */
1781 #if defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL)
1782 void bpf_sk_reuseport_detach(struct sock
*sk
);
1783 int bpf_fd_reuseport_array_lookup_elem(struct bpf_map
*map
, void *key
,
1785 int bpf_fd_reuseport_array_update_elem(struct bpf_map
*map
, void *key
,
1786 void *value
, u64 map_flags
);
1788 static inline void bpf_sk_reuseport_detach(struct sock
*sk
)
1792 #ifdef CONFIG_BPF_SYSCALL
1793 static inline int bpf_fd_reuseport_array_lookup_elem(struct bpf_map
*map
,
1794 void *key
, void *value
)
1799 static inline int bpf_fd_reuseport_array_update_elem(struct bpf_map
*map
,
1800 void *key
, void *value
,
1805 #endif /* CONFIG_BPF_SYSCALL */
1806 #endif /* defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL) */
1808 /* verifier prototypes for helper functions called from eBPF programs */
1809 extern const struct bpf_func_proto bpf_map_lookup_elem_proto
;
1810 extern const struct bpf_func_proto bpf_map_update_elem_proto
;
1811 extern const struct bpf_func_proto bpf_map_delete_elem_proto
;
1812 extern const struct bpf_func_proto bpf_map_push_elem_proto
;
1813 extern const struct bpf_func_proto bpf_map_pop_elem_proto
;
1814 extern const struct bpf_func_proto bpf_map_peek_elem_proto
;
1816 extern const struct bpf_func_proto bpf_get_prandom_u32_proto
;
1817 extern const struct bpf_func_proto bpf_get_smp_processor_id_proto
;
1818 extern const struct bpf_func_proto bpf_get_numa_node_id_proto
;
1819 extern const struct bpf_func_proto bpf_tail_call_proto
;
1820 extern const struct bpf_func_proto bpf_ktime_get_ns_proto
;
1821 extern const struct bpf_func_proto bpf_ktime_get_boot_ns_proto
;
1822 extern const struct bpf_func_proto bpf_get_current_pid_tgid_proto
;
1823 extern const struct bpf_func_proto bpf_get_current_uid_gid_proto
;
1824 extern const struct bpf_func_proto bpf_get_current_comm_proto
;
1825 extern const struct bpf_func_proto bpf_get_stackid_proto
;
1826 extern const struct bpf_func_proto bpf_get_stack_proto
;
1827 extern const struct bpf_func_proto bpf_get_task_stack_proto
;
1828 extern const struct bpf_func_proto bpf_get_stackid_proto_pe
;
1829 extern const struct bpf_func_proto bpf_get_stack_proto_pe
;
1830 extern const struct bpf_func_proto bpf_sock_map_update_proto
;
1831 extern const struct bpf_func_proto bpf_sock_hash_update_proto
;
1832 extern const struct bpf_func_proto bpf_get_current_cgroup_id_proto
;
1833 extern const struct bpf_func_proto bpf_get_current_ancestor_cgroup_id_proto
;
1834 extern const struct bpf_func_proto bpf_msg_redirect_hash_proto
;
1835 extern const struct bpf_func_proto bpf_msg_redirect_map_proto
;
1836 extern const struct bpf_func_proto bpf_sk_redirect_hash_proto
;
1837 extern const struct bpf_func_proto bpf_sk_redirect_map_proto
;
1838 extern const struct bpf_func_proto bpf_spin_lock_proto
;
1839 extern const struct bpf_func_proto bpf_spin_unlock_proto
;
1840 extern const struct bpf_func_proto bpf_get_local_storage_proto
;
1841 extern const struct bpf_func_proto bpf_strtol_proto
;
1842 extern const struct bpf_func_proto bpf_strtoul_proto
;
1843 extern const struct bpf_func_proto bpf_tcp_sock_proto
;
1844 extern const struct bpf_func_proto bpf_jiffies64_proto
;
1845 extern const struct bpf_func_proto bpf_get_ns_current_pid_tgid_proto
;
1846 extern const struct bpf_func_proto bpf_event_output_data_proto
;
1847 extern const struct bpf_func_proto bpf_ringbuf_output_proto
;
1848 extern const struct bpf_func_proto bpf_ringbuf_reserve_proto
;
1849 extern const struct bpf_func_proto bpf_ringbuf_submit_proto
;
1850 extern const struct bpf_func_proto bpf_ringbuf_discard_proto
;
1851 extern const struct bpf_func_proto bpf_ringbuf_query_proto
;
1852 extern const struct bpf_func_proto bpf_skc_to_tcp6_sock_proto
;
1853 extern const struct bpf_func_proto bpf_skc_to_tcp_sock_proto
;
1854 extern const struct bpf_func_proto bpf_skc_to_tcp_timewait_sock_proto
;
1855 extern const struct bpf_func_proto bpf_skc_to_tcp_request_sock_proto
;
1856 extern const struct bpf_func_proto bpf_skc_to_udp6_sock_proto
;
1857 extern const struct bpf_func_proto bpf_copy_from_user_proto
;
1858 extern const struct bpf_func_proto bpf_snprintf_btf_proto
;
1859 extern const struct bpf_func_proto bpf_per_cpu_ptr_proto
;
1860 extern const struct bpf_func_proto bpf_this_cpu_ptr_proto
;
1861 extern const struct bpf_func_proto bpf_ktime_get_coarse_ns_proto
;
1862 extern const struct bpf_func_proto bpf_sock_from_file_proto
;
1864 const struct bpf_func_proto
*bpf_tracing_func_proto(
1865 enum bpf_func_id func_id
, const struct bpf_prog
*prog
);
1867 const struct bpf_func_proto
*tracing_prog_func_proto(
1868 enum bpf_func_id func_id
, const struct bpf_prog
*prog
);
1870 /* Shared helpers among cBPF and eBPF. */
1871 void bpf_user_rnd_init_once(void);
1872 u64
bpf_user_rnd_u32(u64 r1
, u64 r2
, u64 r3
, u64 r4
, u64 r5
);
1873 u64
bpf_get_raw_cpu_id(u64 r1
, u64 r2
, u64 r3
, u64 r4
, u64 r5
);
1875 #if defined(CONFIG_NET)
1876 bool bpf_sock_common_is_valid_access(int off
, int size
,
1877 enum bpf_access_type type
,
1878 struct bpf_insn_access_aux
*info
);
1879 bool bpf_sock_is_valid_access(int off
, int size
, enum bpf_access_type type
,
1880 struct bpf_insn_access_aux
*info
);
1881 u32
bpf_sock_convert_ctx_access(enum bpf_access_type type
,
1882 const struct bpf_insn
*si
,
1883 struct bpf_insn
*insn_buf
,
1884 struct bpf_prog
*prog
,
1887 static inline bool bpf_sock_common_is_valid_access(int off
, int size
,
1888 enum bpf_access_type type
,
1889 struct bpf_insn_access_aux
*info
)
1893 static inline bool bpf_sock_is_valid_access(int off
, int size
,
1894 enum bpf_access_type type
,
1895 struct bpf_insn_access_aux
*info
)
1899 static inline u32
bpf_sock_convert_ctx_access(enum bpf_access_type type
,
1900 const struct bpf_insn
*si
,
1901 struct bpf_insn
*insn_buf
,
1902 struct bpf_prog
*prog
,
1910 struct sk_reuseport_kern
{
1911 struct sk_buff
*skb
;
1913 struct sock
*selected_sk
;
1919 bool bpf_tcp_sock_is_valid_access(int off
, int size
, enum bpf_access_type type
,
1920 struct bpf_insn_access_aux
*info
);
1922 u32
bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type
,
1923 const struct bpf_insn
*si
,
1924 struct bpf_insn
*insn_buf
,
1925 struct bpf_prog
*prog
,
1928 bool bpf_xdp_sock_is_valid_access(int off
, int size
, enum bpf_access_type type
,
1929 struct bpf_insn_access_aux
*info
);
1931 u32
bpf_xdp_sock_convert_ctx_access(enum bpf_access_type type
,
1932 const struct bpf_insn
*si
,
1933 struct bpf_insn
*insn_buf
,
1934 struct bpf_prog
*prog
,
1937 static inline bool bpf_tcp_sock_is_valid_access(int off
, int size
,
1938 enum bpf_access_type type
,
1939 struct bpf_insn_access_aux
*info
)
1944 static inline u32
bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type
,
1945 const struct bpf_insn
*si
,
1946 struct bpf_insn
*insn_buf
,
1947 struct bpf_prog
*prog
,
1952 static inline bool bpf_xdp_sock_is_valid_access(int off
, int size
,
1953 enum bpf_access_type type
,
1954 struct bpf_insn_access_aux
*info
)
1959 static inline u32
bpf_xdp_sock_convert_ctx_access(enum bpf_access_type type
,
1960 const struct bpf_insn
*si
,
1961 struct bpf_insn
*insn_buf
,
1962 struct bpf_prog
*prog
,
1967 #endif /* CONFIG_INET */
1969 enum bpf_text_poke_type
{
1974 int bpf_arch_text_poke(void *ip
, enum bpf_text_poke_type t
,
1975 void *addr1
, void *addr2
);
1978 bool btf_id_set_contains(const struct btf_id_set
*set
, u32 id
);
1980 #endif /* _LINUX_BPF_H */