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/percpu-refcount.h>
25 struct bpf_verifier_env;
26 struct bpf_verifier_log;
35 struct exception_table_entry;
36 struct seq_operations;
37 struct bpf_iter_aux_info;
38 struct bpf_local_storage;
39 struct bpf_local_storage_map;
41 extern struct idr btf_idr;
42 extern spinlock_t btf_idr_lock;
44 typedef int (*bpf_iter_init_seq_priv_t)(void *private_data,
45 struct bpf_iter_aux_info *aux);
46 typedef void (*bpf_iter_fini_seq_priv_t)(void *private_data);
47 struct bpf_iter_seq_info {
48 const struct seq_operations *seq_ops;
49 bpf_iter_init_seq_priv_t init_seq_private;
50 bpf_iter_fini_seq_priv_t fini_seq_private;
54 /* map is generic key/value storage optionally accesible by eBPF programs */
56 /* funcs callable from userspace (via syscall) */
57 int (*map_alloc_check)(union bpf_attr *attr);
58 struct bpf_map *(*map_alloc)(union bpf_attr *attr);
59 void (*map_release)(struct bpf_map *map, struct file *map_file);
60 void (*map_free)(struct bpf_map *map);
61 int (*map_get_next_key)(struct bpf_map *map, void *key, void *next_key);
62 void (*map_release_uref)(struct bpf_map *map);
63 void *(*map_lookup_elem_sys_only)(struct bpf_map *map, void *key);
64 int (*map_lookup_batch)(struct bpf_map *map, const union bpf_attr *attr,
65 union bpf_attr __user *uattr);
66 int (*map_lookup_and_delete_batch)(struct bpf_map *map,
67 const union bpf_attr *attr,
68 union bpf_attr __user *uattr);
69 int (*map_update_batch)(struct bpf_map *map, const union bpf_attr *attr,
70 union bpf_attr __user *uattr);
71 int (*map_delete_batch)(struct bpf_map *map, const union bpf_attr *attr,
72 union bpf_attr __user *uattr);
74 /* funcs callable from userspace and from eBPF programs */
75 void *(*map_lookup_elem)(struct bpf_map *map, void *key);
76 int (*map_update_elem)(struct bpf_map *map, void *key, void *value, u64 flags);
77 int (*map_delete_elem)(struct bpf_map *map, void *key);
78 int (*map_push_elem)(struct bpf_map *map, void *value, u64 flags);
79 int (*map_pop_elem)(struct bpf_map *map, void *value);
80 int (*map_peek_elem)(struct bpf_map *map, void *value);
82 /* funcs called by prog_array and perf_event_array map */
83 void *(*map_fd_get_ptr)(struct bpf_map *map, struct file *map_file,
85 void (*map_fd_put_ptr)(void *ptr);
86 int (*map_gen_lookup)(struct bpf_map *map, struct bpf_insn *insn_buf);
87 u32 (*map_fd_sys_lookup_elem)(void *ptr);
88 void (*map_seq_show_elem)(struct bpf_map *map, void *key,
90 int (*map_check_btf)(const struct bpf_map *map,
91 const struct btf *btf,
92 const struct btf_type *key_type,
93 const struct btf_type *value_type);
95 /* Prog poke tracking helpers. */
96 int (*map_poke_track)(struct bpf_map *map, struct bpf_prog_aux *aux);
97 void (*map_poke_untrack)(struct bpf_map *map, struct bpf_prog_aux *aux);
98 void (*map_poke_run)(struct bpf_map *map, u32 key, struct bpf_prog *old,
99 struct bpf_prog *new);
101 /* Direct value access helpers. */
102 int (*map_direct_value_addr)(const struct bpf_map *map,
104 int (*map_direct_value_meta)(const struct bpf_map *map,
106 int (*map_mmap)(struct bpf_map *map, struct vm_area_struct *vma);
107 __poll_t (*map_poll)(struct bpf_map *map, struct file *filp,
108 struct poll_table_struct *pts);
110 /* Functions called by bpf_local_storage maps */
111 int (*map_local_storage_charge)(struct bpf_local_storage_map *smap,
112 void *owner, u32 size);
113 void (*map_local_storage_uncharge)(struct bpf_local_storage_map *smap,
114 void *owner, u32 size);
115 struct bpf_local_storage __rcu ** (*map_owner_storage_ptr)(void *owner);
117 /* map_meta_equal must be implemented for maps that can be
118 * used as an inner map. It is a runtime check to ensure
119 * an inner map can be inserted to an outer map.
121 * Some properties of the inner map has been used during the
122 * verification time. When inserting an inner map at the runtime,
123 * map_meta_equal has to ensure the inserting map has the same
124 * properties that the verifier has used earlier.
126 bool (*map_meta_equal)(const struct bpf_map *meta0,
127 const struct bpf_map *meta1);
129 /* BTF name and id of struct allocated by map_alloc */
130 const char * const map_btf_name;
133 /* bpf_iter info used to open a seq_file */
134 const struct bpf_iter_seq_info *iter_seq_info;
137 struct bpf_map_memory {
139 struct user_struct *user;
143 /* The first two cachelines with read-mostly members of which some
144 * are also accessed in fast-path (e.g. ops, max_entries).
146 const struct bpf_map_ops *ops ____cacheline_aligned;
147 struct bpf_map *inner_map_meta;
148 #ifdef CONFIG_SECURITY
151 enum bpf_map_type map_type;
156 int spin_lock_off; /* >=0 valid offset, <0 error */
160 u32 btf_value_type_id;
162 struct bpf_map_memory memory;
163 char name[BPF_OBJ_NAME_LEN];
164 u32 btf_vmlinux_value_type_id;
166 bool frozen; /* write-once; write-protected by freeze_mutex */
169 /* The 3rd and 4th cacheline with misc members to avoid false sharing
170 * particularly with refcounting.
172 atomic64_t refcnt ____cacheline_aligned;
174 struct work_struct work;
175 struct mutex freeze_mutex;
176 u64 writecnt; /* writable mmap cnt; protected by freeze_mutex */
179 static inline bool map_value_has_spin_lock(const struct bpf_map *map)
181 return map->spin_lock_off >= 0;
184 static inline void check_and_init_map_lock(struct bpf_map *map, void *dst)
186 if (likely(!map_value_has_spin_lock(map)))
188 *(struct bpf_spin_lock *)(dst + map->spin_lock_off) =
189 (struct bpf_spin_lock){};
192 /* copy everything but bpf_spin_lock */
193 static inline void copy_map_value(struct bpf_map *map, void *dst, void *src)
195 if (unlikely(map_value_has_spin_lock(map))) {
196 u32 off = map->spin_lock_off;
198 memcpy(dst, src, off);
199 memcpy(dst + off + sizeof(struct bpf_spin_lock),
200 src + off + sizeof(struct bpf_spin_lock),
201 map->value_size - off - sizeof(struct bpf_spin_lock));
203 memcpy(dst, src, map->value_size);
206 void copy_map_value_locked(struct bpf_map *map, void *dst, void *src,
208 int bpf_obj_name_cpy(char *dst, const char *src, unsigned int size);
210 struct bpf_offload_dev;
211 struct bpf_offloaded_map;
213 struct bpf_map_dev_ops {
214 int (*map_get_next_key)(struct bpf_offloaded_map *map,
215 void *key, void *next_key);
216 int (*map_lookup_elem)(struct bpf_offloaded_map *map,
217 void *key, void *value);
218 int (*map_update_elem)(struct bpf_offloaded_map *map,
219 void *key, void *value, u64 flags);
220 int (*map_delete_elem)(struct bpf_offloaded_map *map, void *key);
223 struct bpf_offloaded_map {
225 struct net_device *netdev;
226 const struct bpf_map_dev_ops *dev_ops;
228 struct list_head offloads;
231 static inline struct bpf_offloaded_map *map_to_offmap(struct bpf_map *map)
233 return container_of(map, struct bpf_offloaded_map, map);
236 static inline bool bpf_map_offload_neutral(const struct bpf_map *map)
238 return map->map_type == BPF_MAP_TYPE_PERF_EVENT_ARRAY;
241 static inline bool bpf_map_support_seq_show(const struct bpf_map *map)
243 return (map->btf_value_type_id || map->btf_vmlinux_value_type_id) &&
244 map->ops->map_seq_show_elem;
247 int map_check_no_btf(const struct bpf_map *map,
248 const struct btf *btf,
249 const struct btf_type *key_type,
250 const struct btf_type *value_type);
252 bool bpf_map_meta_equal(const struct bpf_map *meta0,
253 const struct bpf_map *meta1);
255 extern const struct bpf_map_ops bpf_map_offload_ops;
257 /* function argument constraints */
259 ARG_DONTCARE = 0, /* unused argument in helper function */
261 /* the following constraints used to prototype
262 * bpf_map_lookup/update/delete_elem() functions
264 ARG_CONST_MAP_PTR, /* const argument used as pointer to bpf_map */
265 ARG_PTR_TO_MAP_KEY, /* pointer to stack used as map key */
266 ARG_PTR_TO_MAP_VALUE, /* pointer to stack used as map value */
267 ARG_PTR_TO_UNINIT_MAP_VALUE, /* pointer to valid memory used to store a map value */
268 ARG_PTR_TO_MAP_VALUE_OR_NULL, /* pointer to stack used as map value or NULL */
270 /* the following constraints used to prototype bpf_memcmp() and other
271 * functions that access data on eBPF program stack
273 ARG_PTR_TO_MEM, /* pointer to valid memory (stack, packet, map value) */
274 ARG_PTR_TO_MEM_OR_NULL, /* pointer to valid memory or NULL */
275 ARG_PTR_TO_UNINIT_MEM, /* pointer to memory does not need to be initialized,
276 * helper function must fill all bytes or clear
277 * them in error case.
280 ARG_CONST_SIZE, /* number of bytes accessed from memory */
281 ARG_CONST_SIZE_OR_ZERO, /* number of bytes accessed from memory or 0 */
283 ARG_PTR_TO_CTX, /* pointer to context */
284 ARG_PTR_TO_CTX_OR_NULL, /* pointer to context or NULL */
285 ARG_ANYTHING, /* any (initialized) argument is ok */
286 ARG_PTR_TO_SPIN_LOCK, /* pointer to bpf_spin_lock */
287 ARG_PTR_TO_SOCK_COMMON, /* pointer to sock_common */
288 ARG_PTR_TO_INT, /* pointer to int */
289 ARG_PTR_TO_LONG, /* pointer to long */
290 ARG_PTR_TO_SOCKET, /* pointer to bpf_sock (fullsock) */
291 ARG_PTR_TO_SOCKET_OR_NULL, /* pointer to bpf_sock (fullsock) or NULL */
292 ARG_PTR_TO_BTF_ID, /* pointer to in-kernel struct */
293 ARG_PTR_TO_ALLOC_MEM, /* pointer to dynamically allocated memory */
294 ARG_PTR_TO_ALLOC_MEM_OR_NULL, /* pointer to dynamically allocated memory or NULL */
295 ARG_CONST_ALLOC_SIZE_OR_ZERO, /* number of allocated bytes requested */
296 ARG_PTR_TO_BTF_ID_SOCK_COMMON, /* pointer to in-kernel sock_common or bpf-mirrored bpf_sock */
297 ARG_PTR_TO_PERCPU_BTF_ID, /* pointer to in-kernel percpu type */
301 /* type of values returned from helper functions */
302 enum bpf_return_type {
303 RET_INTEGER, /* function returns integer */
304 RET_VOID, /* function doesn't return anything */
305 RET_PTR_TO_MAP_VALUE, /* returns a pointer to map elem value */
306 RET_PTR_TO_MAP_VALUE_OR_NULL, /* returns a pointer to map elem value or NULL */
307 RET_PTR_TO_SOCKET_OR_NULL, /* returns a pointer to a socket or NULL */
308 RET_PTR_TO_TCP_SOCK_OR_NULL, /* returns a pointer to a tcp_sock or NULL */
309 RET_PTR_TO_SOCK_COMMON_OR_NULL, /* returns a pointer to a sock_common or NULL */
310 RET_PTR_TO_ALLOC_MEM_OR_NULL, /* returns a pointer to dynamically allocated memory or NULL */
311 RET_PTR_TO_BTF_ID_OR_NULL, /* returns a pointer to a btf_id or NULL */
312 RET_PTR_TO_MEM_OR_BTF_ID_OR_NULL, /* returns a pointer to a valid memory or a btf_id or NULL */
313 RET_PTR_TO_MEM_OR_BTF_ID, /* returns a pointer to a valid memory or a btf_id */
316 /* eBPF function prototype used by verifier to allow BPF_CALLs from eBPF programs
317 * to in-kernel helper functions and for adjusting imm32 field in BPF_CALL
318 * instructions after verifying
320 struct bpf_func_proto {
321 u64 (*func)(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
324 enum bpf_return_type ret_type;
327 enum bpf_arg_type arg1_type;
328 enum bpf_arg_type arg2_type;
329 enum bpf_arg_type arg3_type;
330 enum bpf_arg_type arg4_type;
331 enum bpf_arg_type arg5_type;
333 enum bpf_arg_type arg_type[5];
345 int *ret_btf_id; /* return value btf_id */
346 bool (*allowed)(const struct bpf_prog *prog);
349 /* bpf_context is intentionally undefined structure. Pointer to bpf_context is
350 * the first argument to eBPF programs.
351 * For socket filters: 'struct bpf_context *' == 'struct sk_buff *'
355 enum bpf_access_type {
360 /* types of values stored in eBPF registers */
361 /* Pointer types represent:
364 * pointer + (u16) var
365 * pointer + (u16) var + imm
366 * if (range > 0) then [ptr, ptr + range - off) is safe to access
367 * if (id > 0) means that some 'var' was added
368 * if (off > 0) means that 'imm' was added
371 NOT_INIT = 0, /* nothing was written into register */
372 SCALAR_VALUE, /* reg doesn't contain a valid pointer */
373 PTR_TO_CTX, /* reg points to bpf_context */
374 CONST_PTR_TO_MAP, /* reg points to struct bpf_map */
375 PTR_TO_MAP_VALUE, /* reg points to map element value */
376 PTR_TO_MAP_VALUE_OR_NULL,/* points to map elem value or NULL */
377 PTR_TO_STACK, /* reg == frame_pointer + offset */
378 PTR_TO_PACKET_META, /* skb->data - meta_len */
379 PTR_TO_PACKET, /* reg points to skb->data */
380 PTR_TO_PACKET_END, /* skb->data + headlen */
381 PTR_TO_FLOW_KEYS, /* reg points to bpf_flow_keys */
382 PTR_TO_SOCKET, /* reg points to struct bpf_sock */
383 PTR_TO_SOCKET_OR_NULL, /* reg points to struct bpf_sock or NULL */
384 PTR_TO_SOCK_COMMON, /* reg points to sock_common */
385 PTR_TO_SOCK_COMMON_OR_NULL, /* reg points to sock_common or NULL */
386 PTR_TO_TCP_SOCK, /* reg points to struct tcp_sock */
387 PTR_TO_TCP_SOCK_OR_NULL, /* reg points to struct tcp_sock or NULL */
388 PTR_TO_TP_BUFFER, /* reg points to a writable raw tp's buffer */
389 PTR_TO_XDP_SOCK, /* reg points to struct xdp_sock */
390 /* PTR_TO_BTF_ID points to a kernel struct that does not need
391 * to be null checked by the BPF program. This does not imply the
392 * pointer is _not_ null and in practice this can easily be a null
393 * pointer when reading pointer chains. The assumption is program
394 * context will handle null pointer dereference typically via fault
395 * handling. The verifier must keep this in mind and can make no
396 * assumptions about null or non-null when doing branch analysis.
397 * Further, when passed into helpers the helpers can not, without
398 * additional context, assume the value is non-null.
401 /* PTR_TO_BTF_ID_OR_NULL points to a kernel struct that has not
402 * been checked for null. Used primarily to inform the verifier
403 * an explicit null check is required for this struct.
405 PTR_TO_BTF_ID_OR_NULL,
406 PTR_TO_MEM, /* reg points to valid memory region */
407 PTR_TO_MEM_OR_NULL, /* reg points to valid memory region or NULL */
408 PTR_TO_RDONLY_BUF, /* reg points to a readonly buffer */
409 PTR_TO_RDONLY_BUF_OR_NULL, /* reg points to a readonly buffer or NULL */
410 PTR_TO_RDWR_BUF, /* reg points to a read/write buffer */
411 PTR_TO_RDWR_BUF_OR_NULL, /* reg points to a read/write buffer or NULL */
412 PTR_TO_PERCPU_BTF_ID, /* reg points to a percpu kernel variable */
415 /* The information passed from prog-specific *_is_valid_access
416 * back to the verifier.
418 struct bpf_insn_access_aux {
419 enum bpf_reg_type reg_type;
424 struct bpf_verifier_log *log; /* for verbose logs */
428 bpf_ctx_record_field_size(struct bpf_insn_access_aux *aux, u32 size)
430 aux->ctx_field_size = size;
433 struct bpf_prog_ops {
434 int (*test_run)(struct bpf_prog *prog, const union bpf_attr *kattr,
435 union bpf_attr __user *uattr);
438 struct bpf_verifier_ops {
439 /* return eBPF function prototype for verification */
440 const struct bpf_func_proto *
441 (*get_func_proto)(enum bpf_func_id func_id,
442 const struct bpf_prog *prog);
444 /* return true if 'size' wide access at offset 'off' within bpf_context
445 * with 'type' (read or write) is allowed
447 bool (*is_valid_access)(int off, int size, enum bpf_access_type type,
448 const struct bpf_prog *prog,
449 struct bpf_insn_access_aux *info);
450 int (*gen_prologue)(struct bpf_insn *insn, bool direct_write,
451 const struct bpf_prog *prog);
452 int (*gen_ld_abs)(const struct bpf_insn *orig,
453 struct bpf_insn *insn_buf);
454 u32 (*convert_ctx_access)(enum bpf_access_type type,
455 const struct bpf_insn *src,
456 struct bpf_insn *dst,
457 struct bpf_prog *prog, u32 *target_size);
458 int (*btf_struct_access)(struct bpf_verifier_log *log,
459 const struct btf_type *t, int off, int size,
460 enum bpf_access_type atype,
464 struct bpf_prog_offload_ops {
465 /* verifier basic callbacks */
466 int (*insn_hook)(struct bpf_verifier_env *env,
467 int insn_idx, int prev_insn_idx);
468 int (*finalize)(struct bpf_verifier_env *env);
469 /* verifier optimization callbacks (called after .finalize) */
470 int (*replace_insn)(struct bpf_verifier_env *env, u32 off,
471 struct bpf_insn *insn);
472 int (*remove_insns)(struct bpf_verifier_env *env, u32 off, u32 cnt);
473 /* program management callbacks */
474 int (*prepare)(struct bpf_prog *prog);
475 int (*translate)(struct bpf_prog *prog);
476 void (*destroy)(struct bpf_prog *prog);
479 struct bpf_prog_offload {
480 struct bpf_prog *prog;
481 struct net_device *netdev;
482 struct bpf_offload_dev *offdev;
484 struct list_head offloads;
491 enum bpf_cgroup_storage_type {
492 BPF_CGROUP_STORAGE_SHARED,
493 BPF_CGROUP_STORAGE_PERCPU,
494 __BPF_CGROUP_STORAGE_MAX
497 #define MAX_BPF_CGROUP_STORAGE_TYPE __BPF_CGROUP_STORAGE_MAX
499 /* The longest tracepoint has 12 args.
500 * See include/trace/bpf_probe.h
502 #define MAX_BPF_FUNC_ARGS 12
504 struct bpf_prog_stats {
507 struct u64_stats_sync syncp;
508 } __aligned(2 * sizeof(u64));
510 struct btf_func_model {
513 u8 arg_size[MAX_BPF_FUNC_ARGS];
516 /* Restore arguments before returning from trampoline to let original function
517 * continue executing. This flag is used for fentry progs when there are no
520 #define BPF_TRAMP_F_RESTORE_REGS BIT(0)
521 /* Call original function after fentry progs, but before fexit progs.
522 * Makes sense for fentry/fexit, normal calls and indirect calls.
524 #define BPF_TRAMP_F_CALL_ORIG BIT(1)
525 /* Skip current frame and return to parent. Makes sense for fentry/fexit
526 * programs only. Should not be used with normal calls and indirect calls.
528 #define BPF_TRAMP_F_SKIP_FRAME BIT(2)
529 /* Return the return value of fentry prog. Only used by bpf_struct_ops. */
530 #define BPF_TRAMP_F_RET_FENTRY_RET BIT(4)
532 /* Each call __bpf_prog_enter + call bpf_func + call __bpf_prog_exit is ~50
533 * bytes on x86. Pick a number to fit into BPF_IMAGE_SIZE / 2
535 #define BPF_MAX_TRAMP_PROGS 40
537 struct bpf_tramp_progs {
538 struct bpf_prog *progs[BPF_MAX_TRAMP_PROGS];
542 /* Different use cases for BPF trampoline:
543 * 1. replace nop at the function entry (kprobe equivalent)
544 * flags = BPF_TRAMP_F_RESTORE_REGS
545 * fentry = a set of programs to run before returning from trampoline
547 * 2. replace nop at the function entry (kprobe + kretprobe equivalent)
548 * flags = BPF_TRAMP_F_CALL_ORIG | BPF_TRAMP_F_SKIP_FRAME
549 * orig_call = fentry_ip + MCOUNT_INSN_SIZE
550 * fentry = a set of program to run before calling original function
551 * fexit = a set of program to run after original function
553 * 3. replace direct call instruction anywhere in the function body
554 * or assign a function pointer for indirect call (like tcp_congestion_ops->cong_avoid)
556 * fentry = a set of programs to run before returning from trampoline
557 * With flags = BPF_TRAMP_F_CALL_ORIG
558 * orig_call = original callback addr or direct function addr
559 * fentry = a set of program to run before calling original function
560 * fexit = a set of program to run after original function
562 struct bpf_tramp_image;
563 int arch_prepare_bpf_trampoline(struct bpf_tramp_image *tr, void *image, void *image_end,
564 const struct btf_func_model *m, u32 flags,
565 struct bpf_tramp_progs *tprogs,
567 /* these two functions are called from generated trampoline */
568 u64 notrace __bpf_prog_enter(void);
569 void notrace __bpf_prog_exit(struct bpf_prog *prog, u64 start);
570 void notrace __bpf_prog_enter_sleepable(void);
571 void notrace __bpf_prog_exit_sleepable(void);
572 void notrace __bpf_tramp_enter(struct bpf_tramp_image *tr);
573 void notrace __bpf_tramp_exit(struct bpf_tramp_image *tr);
578 char name[KSYM_NAME_LEN];
579 struct list_head lnode;
580 struct latch_tree_node tnode;
584 enum bpf_tramp_prog_type {
587 BPF_TRAMP_MODIFY_RETURN,
589 BPF_TRAMP_REPLACE, /* more than MAX */
592 struct bpf_tramp_image {
594 struct bpf_ksym ksym;
595 struct percpu_ref pcref;
600 struct work_struct work;
604 struct bpf_trampoline {
605 /* hlist for trampoline_table */
606 struct hlist_node hlist;
607 /* serializes access to fields of this trampoline */
612 struct btf_func_model model;
616 /* if !NULL this is BPF_PROG_TYPE_EXT program that extends another BPF
617 * program by replacing one of its functions. func.addr is the address
618 * of the function it replaced.
620 struct bpf_prog *extension_prog;
621 /* list of BPF programs using this trampoline */
622 struct hlist_head progs_hlist[BPF_TRAMP_MAX];
623 /* Number of attached programs. A counter per kind. */
624 int progs_cnt[BPF_TRAMP_MAX];
625 /* Executable image of trampoline */
626 struct bpf_tramp_image *cur_image;
630 struct bpf_attach_target_info {
631 struct btf_func_model fmodel;
633 const char *tgt_name;
634 const struct btf_type *tgt_type;
637 #define BPF_DISPATCHER_MAX 48 /* Fits in 2048B */
639 struct bpf_dispatcher_prog {
640 struct bpf_prog *prog;
644 struct bpf_dispatcher {
645 /* dispatcher mutex */
648 struct bpf_dispatcher_prog progs[BPF_DISPATCHER_MAX];
652 struct bpf_ksym ksym;
655 static __always_inline unsigned int bpf_dispatcher_nop_func(
657 const struct bpf_insn *insnsi,
658 unsigned int (*bpf_func)(const void *,
659 const struct bpf_insn *))
661 return bpf_func(ctx, insnsi);
663 #ifdef CONFIG_BPF_JIT
664 int bpf_trampoline_link_prog(struct bpf_prog *prog, struct bpf_trampoline *tr);
665 int bpf_trampoline_unlink_prog(struct bpf_prog *prog, struct bpf_trampoline *tr);
666 struct bpf_trampoline *bpf_trampoline_get(u64 key,
667 struct bpf_attach_target_info *tgt_info);
668 void bpf_trampoline_put(struct bpf_trampoline *tr);
669 #define BPF_DISPATCHER_INIT(_name) { \
670 .mutex = __MUTEX_INITIALIZER(_name.mutex), \
671 .func = &_name##_func, \
678 .lnode = LIST_HEAD_INIT(_name.ksym.lnode), \
682 #define DEFINE_BPF_DISPATCHER(name) \
683 noinline unsigned int bpf_dispatcher_##name##_func( \
685 const struct bpf_insn *insnsi, \
686 unsigned int (*bpf_func)(const void *, \
687 const struct bpf_insn *)) \
689 return bpf_func(ctx, insnsi); \
691 EXPORT_SYMBOL(bpf_dispatcher_##name##_func); \
692 struct bpf_dispatcher bpf_dispatcher_##name = \
693 BPF_DISPATCHER_INIT(bpf_dispatcher_##name);
694 #define DECLARE_BPF_DISPATCHER(name) \
695 unsigned int bpf_dispatcher_##name##_func( \
697 const struct bpf_insn *insnsi, \
698 unsigned int (*bpf_func)(const void *, \
699 const struct bpf_insn *)); \
700 extern struct bpf_dispatcher bpf_dispatcher_##name;
701 #define BPF_DISPATCHER_FUNC(name) bpf_dispatcher_##name##_func
702 #define BPF_DISPATCHER_PTR(name) (&bpf_dispatcher_##name)
703 void bpf_dispatcher_change_prog(struct bpf_dispatcher *d, struct bpf_prog *from,
704 struct bpf_prog *to);
705 /* Called only from JIT-enabled code, so there's no need for stubs. */
706 void *bpf_jit_alloc_exec_page(void);
707 void bpf_image_ksym_add(void *data, struct bpf_ksym *ksym);
708 void bpf_image_ksym_del(struct bpf_ksym *ksym);
709 void bpf_ksym_add(struct bpf_ksym *ksym);
710 void bpf_ksym_del(struct bpf_ksym *ksym);
711 int bpf_jit_charge_modmem(u32 pages);
712 void bpf_jit_uncharge_modmem(u32 pages);
714 static inline int bpf_trampoline_link_prog(struct bpf_prog *prog,
715 struct bpf_trampoline *tr)
719 static inline int bpf_trampoline_unlink_prog(struct bpf_prog *prog,
720 struct bpf_trampoline *tr)
724 static inline struct bpf_trampoline *bpf_trampoline_get(u64 key,
725 struct bpf_attach_target_info *tgt_info)
727 return ERR_PTR(-EOPNOTSUPP);
729 static inline void bpf_trampoline_put(struct bpf_trampoline *tr) {}
730 #define DEFINE_BPF_DISPATCHER(name)
731 #define DECLARE_BPF_DISPATCHER(name)
732 #define BPF_DISPATCHER_FUNC(name) bpf_dispatcher_nop_func
733 #define BPF_DISPATCHER_PTR(name) NULL
734 static inline void bpf_dispatcher_change_prog(struct bpf_dispatcher *d,
735 struct bpf_prog *from,
736 struct bpf_prog *to) {}
737 static inline bool is_bpf_image_address(unsigned long address)
743 struct bpf_func_info_aux {
748 enum bpf_jit_poke_reason {
749 BPF_POKE_REASON_TAIL_CALL,
752 /* Descriptor of pokes pointing /into/ the JITed image. */
753 struct bpf_jit_poke_descriptor {
754 void *tailcall_target;
755 void *tailcall_bypass;
764 bool tailcall_target_stable;
770 /* reg_type info for ctx arguments */
771 struct bpf_ctx_arg_aux {
773 enum bpf_reg_type reg_type;
777 struct bpf_prog_aux {
785 u32 func_cnt; /* used by non-func prog as the number of func progs */
786 u32 func_idx; /* 0 for non-func prog, the index in func array for func prog */
787 u32 attach_btf_id; /* in-kernel BTF type id to attach to */
788 u32 ctx_arg_info_size;
789 u32 max_rdonly_access;
791 const struct bpf_ctx_arg_aux *ctx_arg_info;
792 struct mutex dst_mutex; /* protects dst_* pointers below, *after* prog becomes visible */
793 struct bpf_prog *dst_prog;
794 struct bpf_trampoline *dst_trampoline;
795 enum bpf_prog_type saved_dst_prog_type;
796 enum bpf_attach_type saved_dst_attach_type;
797 bool verifier_zext; /* Zero extensions has been inserted by verifier. */
798 bool offload_requested;
799 bool attach_btf_trace; /* true if attaching to BTF-enabled raw tp */
800 bool func_proto_unreliable;
802 bool tail_call_reachable;
803 struct hlist_node tramp_hlist;
804 /* BTF_KIND_FUNC_PROTO for valid attach_btf_id */
805 const struct btf_type *attach_func_proto;
806 /* function name for valid attach_btf_id */
807 const char *attach_func_name;
808 struct bpf_prog **func;
809 void *jit_data; /* JIT specific data. arch dependent */
810 struct bpf_jit_poke_descriptor *poke_tab;
812 struct bpf_ksym ksym;
813 const struct bpf_prog_ops *ops;
814 struct bpf_map **used_maps;
815 struct mutex used_maps_mutex; /* mutex for used_maps and used_map_cnt */
816 struct bpf_prog *prog;
817 struct user_struct *user;
818 u64 load_time; /* ns since boottime */
819 struct bpf_map *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE];
820 char name[BPF_OBJ_NAME_LEN];
821 #ifdef CONFIG_SECURITY
824 struct bpf_prog_offload *offload;
826 struct bpf_func_info *func_info;
827 struct bpf_func_info_aux *func_info_aux;
828 /* bpf_line_info loaded from userspace. linfo->insn_off
829 * has the xlated insn offset.
830 * Both the main and sub prog share the same linfo.
831 * The subprog can access its first linfo by
832 * using the linfo_idx.
834 struct bpf_line_info *linfo;
835 /* jited_linfo is the jited addr of the linfo. It has a
836 * one to one mapping to linfo:
837 * jited_linfo[i] is the jited addr for the linfo[i]->insn_off.
838 * Both the main and sub prog share the same jited_linfo.
839 * The subprog can access its first jited_linfo by
840 * using the linfo_idx.
845 /* subprog can use linfo_idx to access its first linfo and
847 * main prog always has linfo_idx == 0
851 struct exception_table_entry *extable;
852 struct bpf_prog_stats __percpu *stats;
854 struct work_struct work;
859 struct bpf_array_aux {
860 /* 'Ownership' of prog array is claimed by the first program that
861 * is going to use this map or by the first program which FD is
862 * stored in the map to make sure that all callers and callees have
863 * the same prog type and JITed flag.
867 enum bpf_prog_type type;
870 /* Programs with direct jumps into programs part of this array. */
871 struct list_head poke_progs;
873 struct mutex poke_mutex;
874 struct work_struct work;
880 enum bpf_link_type type;
881 const struct bpf_link_ops *ops;
882 struct bpf_prog *prog;
883 struct work_struct work;
886 struct bpf_link_ops {
887 void (*release)(struct bpf_link *link);
888 void (*dealloc)(struct bpf_link *link);
889 int (*detach)(struct bpf_link *link);
890 int (*update_prog)(struct bpf_link *link, struct bpf_prog *new_prog,
891 struct bpf_prog *old_prog);
892 void (*show_fdinfo)(const struct bpf_link *link, struct seq_file *seq);
893 int (*fill_link_info)(const struct bpf_link *link,
894 struct bpf_link_info *info);
897 struct bpf_link_primer {
898 struct bpf_link *link;
904 struct bpf_struct_ops_value;
908 #define BPF_STRUCT_OPS_MAX_NR_MEMBERS 64
909 struct bpf_struct_ops {
910 const struct bpf_verifier_ops *verifier_ops;
911 int (*init)(struct btf *btf);
912 int (*check_member)(const struct btf_type *t,
913 const struct btf_member *member);
914 int (*init_member)(const struct btf_type *t,
915 const struct btf_member *member,
916 void *kdata, const void *udata);
917 int (*reg)(void *kdata);
918 void (*unreg)(void *kdata);
919 const struct btf_type *type;
920 const struct btf_type *value_type;
922 struct btf_func_model func_models[BPF_STRUCT_OPS_MAX_NR_MEMBERS];
927 #if defined(CONFIG_BPF_JIT) && defined(CONFIG_BPF_SYSCALL)
928 #define BPF_MODULE_OWNER ((void *)((0xeB9FUL << 2) + POISON_POINTER_DELTA))
929 const struct bpf_struct_ops *bpf_struct_ops_find(u32 type_id);
930 void bpf_struct_ops_init(struct btf *btf, struct bpf_verifier_log *log);
931 bool bpf_struct_ops_get(const void *kdata);
932 void bpf_struct_ops_put(const void *kdata);
933 int bpf_struct_ops_map_sys_lookup_elem(struct bpf_map *map, void *key,
935 static inline bool bpf_try_module_get(const void *data, struct module *owner)
937 if (owner == BPF_MODULE_OWNER)
938 return bpf_struct_ops_get(data);
940 return try_module_get(owner);
942 static inline void bpf_module_put(const void *data, struct module *owner)
944 if (owner == BPF_MODULE_OWNER)
945 bpf_struct_ops_put(data);
950 static inline const struct bpf_struct_ops *bpf_struct_ops_find(u32 type_id)
954 static inline void bpf_struct_ops_init(struct btf *btf,
955 struct bpf_verifier_log *log)
958 static inline bool bpf_try_module_get(const void *data, struct module *owner)
960 return try_module_get(owner);
962 static inline void bpf_module_put(const void *data, struct module *owner)
966 static inline int bpf_struct_ops_map_sys_lookup_elem(struct bpf_map *map,
978 struct bpf_array_aux *aux;
980 char value[0] __aligned(8);
981 void *ptrs[0] __aligned(8);
982 void __percpu *pptrs[0] __aligned(8);
986 #define BPF_COMPLEXITY_LIMIT_INSNS 1000000 /* yes. 1M insns */
987 #define MAX_TAIL_CALL_CNT 32
989 #define BPF_F_ACCESS_MASK (BPF_F_RDONLY | \
990 BPF_F_RDONLY_PROG | \
994 #define BPF_MAP_CAN_READ BIT(0)
995 #define BPF_MAP_CAN_WRITE BIT(1)
997 static inline u32 bpf_map_flags_to_cap(struct bpf_map *map)
999 u32 access_flags = map->map_flags & (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG);
1001 /* Combination of BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG is
1004 if (access_flags & BPF_F_RDONLY_PROG)
1005 return BPF_MAP_CAN_READ;
1006 else if (access_flags & BPF_F_WRONLY_PROG)
1007 return BPF_MAP_CAN_WRITE;
1009 return BPF_MAP_CAN_READ | BPF_MAP_CAN_WRITE;
1012 static inline bool bpf_map_flags_access_ok(u32 access_flags)
1014 return (access_flags & (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG)) !=
1015 (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG);
1018 struct bpf_event_entry {
1019 struct perf_event *event;
1020 struct file *perf_file;
1021 struct file *map_file;
1022 struct rcu_head rcu;
1025 bool bpf_prog_array_compatible(struct bpf_array *array, const struct bpf_prog *fp);
1026 int bpf_prog_calc_tag(struct bpf_prog *fp);
1027 const char *kernel_type_name(u32 btf_type_id);
1029 const struct bpf_func_proto *bpf_get_trace_printk_proto(void);
1031 typedef unsigned long (*bpf_ctx_copy_t)(void *dst, const void *src,
1032 unsigned long off, unsigned long len);
1033 typedef u32 (*bpf_convert_ctx_access_t)(enum bpf_access_type type,
1034 const struct bpf_insn *src,
1035 struct bpf_insn *dst,
1036 struct bpf_prog *prog,
1039 u64 bpf_event_output(struct bpf_map *map, u64 flags, void *meta, u64 meta_size,
1040 void *ctx, u64 ctx_size, bpf_ctx_copy_t ctx_copy);
1042 /* an array of programs to be executed under rcu_lock.
1045 * ret = BPF_PROG_RUN_ARRAY(&bpf_prog_array, ctx, BPF_PROG_RUN);
1047 * the structure returned by bpf_prog_array_alloc() should be populated
1048 * with program pointers and the last pointer must be NULL.
1049 * The user has to keep refcnt on the program and make sure the program
1050 * is removed from the array before bpf_prog_put().
1051 * The 'struct bpf_prog_array *' should only be replaced with xchg()
1052 * since other cpus are walking the array of pointers in parallel.
1054 struct bpf_prog_array_item {
1055 struct bpf_prog *prog;
1056 struct bpf_cgroup_storage *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE];
1059 struct bpf_prog_array {
1060 struct rcu_head rcu;
1061 struct bpf_prog_array_item items[];
1064 struct bpf_prog_array *bpf_prog_array_alloc(u32 prog_cnt, gfp_t flags);
1065 void bpf_prog_array_free(struct bpf_prog_array *progs);
1066 int bpf_prog_array_length(struct bpf_prog_array *progs);
1067 bool bpf_prog_array_is_empty(struct bpf_prog_array *array);
1068 int bpf_prog_array_copy_to_user(struct bpf_prog_array *progs,
1069 __u32 __user *prog_ids, u32 cnt);
1071 void bpf_prog_array_delete_safe(struct bpf_prog_array *progs,
1072 struct bpf_prog *old_prog);
1073 int bpf_prog_array_delete_safe_at(struct bpf_prog_array *array, int index);
1074 int bpf_prog_array_update_at(struct bpf_prog_array *array, int index,
1075 struct bpf_prog *prog);
1076 int bpf_prog_array_copy_info(struct bpf_prog_array *array,
1077 u32 *prog_ids, u32 request_cnt,
1079 int bpf_prog_array_copy(struct bpf_prog_array *old_array,
1080 struct bpf_prog *exclude_prog,
1081 struct bpf_prog *include_prog,
1082 struct bpf_prog_array **new_array);
1084 #define __BPF_PROG_RUN_ARRAY(array, ctx, func, check_non_null, set_cg_storage) \
1086 struct bpf_prog_array_item *_item; \
1087 struct bpf_prog *_prog; \
1088 struct bpf_prog_array *_array; \
1090 migrate_disable(); \
1092 _array = rcu_dereference(array); \
1093 if (unlikely(check_non_null && !_array))\
1095 _item = &_array->items[0]; \
1096 while ((_prog = READ_ONCE(_item->prog))) { \
1097 if (!set_cg_storage) { \
1098 _ret &= func(_prog, ctx); \
1100 if (unlikely(bpf_cgroup_storage_set(_item->cgroup_storage))) \
1102 _ret &= func(_prog, ctx); \
1103 bpf_cgroup_storage_unset(); \
1108 rcu_read_unlock(); \
1113 /* To be used by __cgroup_bpf_run_filter_skb for EGRESS BPF progs
1114 * so BPF programs can request cwr for TCP packets.
1116 * Current cgroup skb programs can only return 0 or 1 (0 to drop the
1117 * packet. This macro changes the behavior so the low order bit
1118 * indicates whether the packet should be dropped (0) or not (1)
1119 * and the next bit is a congestion notification bit. This could be
1120 * used by TCP to call tcp_enter_cwr()
1122 * Hence, new allowed return values of CGROUP EGRESS BPF programs are:
1125 * 2: drop packet and cn
1126 * 3: keep packet and cn
1128 * This macro then converts it to one of the NET_XMIT or an error
1129 * code that is then interpreted as drop packet (and no cn):
1130 * 0: NET_XMIT_SUCCESS skb should be transmitted
1131 * 1: NET_XMIT_DROP skb should be dropped and cn
1132 * 2: NET_XMIT_CN skb should be transmitted and cn
1133 * 3: -EPERM skb should be dropped
1135 #define BPF_PROG_CGROUP_INET_EGRESS_RUN_ARRAY(array, ctx, func) \
1137 struct bpf_prog_array_item *_item; \
1138 struct bpf_prog *_prog; \
1139 struct bpf_prog_array *_array; \
1143 migrate_disable(); \
1145 _array = rcu_dereference(array); \
1146 _item = &_array->items[0]; \
1147 while ((_prog = READ_ONCE(_item->prog))) { \
1148 if (unlikely(bpf_cgroup_storage_set(_item->cgroup_storage))) \
1150 ret = func(_prog, ctx); \
1151 bpf_cgroup_storage_unset(); \
1152 _ret &= (ret & 1); \
1156 rcu_read_unlock(); \
1159 _ret = (_cn ? NET_XMIT_CN : NET_XMIT_SUCCESS); \
1161 _ret = (_cn ? NET_XMIT_DROP : -EPERM); \
1165 #define BPF_PROG_RUN_ARRAY(array, ctx, func) \
1166 __BPF_PROG_RUN_ARRAY(array, ctx, func, false, true)
1168 #define BPF_PROG_RUN_ARRAY_CHECK(array, ctx, func) \
1169 __BPF_PROG_RUN_ARRAY(array, ctx, func, true, false)
1171 #ifdef CONFIG_BPF_SYSCALL
1172 DECLARE_PER_CPU(int, bpf_prog_active);
1173 extern struct mutex bpf_stats_enabled_mutex;
1176 * Block execution of BPF programs attached to instrumentation (perf,
1177 * kprobes, tracepoints) to prevent deadlocks on map operations as any of
1178 * these events can happen inside a region which holds a map bucket lock
1179 * and can deadlock on it.
1181 * Use the preemption safe inc/dec variants on RT because migrate disable
1182 * is preemptible on RT and preemption in the middle of the RMW operation
1183 * might lead to inconsistent state. Use the raw variants for non RT
1184 * kernels as migrate_disable() maps to preempt_disable() so the slightly
1185 * more expensive save operation can be avoided.
1187 static inline void bpf_disable_instrumentation(void)
1190 if (IS_ENABLED(CONFIG_PREEMPT_RT))
1191 this_cpu_inc(bpf_prog_active);
1193 __this_cpu_inc(bpf_prog_active);
1196 static inline void bpf_enable_instrumentation(void)
1198 if (IS_ENABLED(CONFIG_PREEMPT_RT))
1199 this_cpu_dec(bpf_prog_active);
1201 __this_cpu_dec(bpf_prog_active);
1205 extern const struct file_operations bpf_map_fops;
1206 extern const struct file_operations bpf_prog_fops;
1207 extern const struct file_operations bpf_iter_fops;
1209 #define BPF_PROG_TYPE(_id, _name, prog_ctx_type, kern_ctx_type) \
1210 extern const struct bpf_prog_ops _name ## _prog_ops; \
1211 extern const struct bpf_verifier_ops _name ## _verifier_ops;
1212 #define BPF_MAP_TYPE(_id, _ops) \
1213 extern const struct bpf_map_ops _ops;
1214 #define BPF_LINK_TYPE(_id, _name)
1215 #include <linux/bpf_types.h>
1216 #undef BPF_PROG_TYPE
1218 #undef BPF_LINK_TYPE
1220 extern const struct bpf_prog_ops bpf_offload_prog_ops;
1221 extern const struct bpf_verifier_ops tc_cls_act_analyzer_ops;
1222 extern const struct bpf_verifier_ops xdp_analyzer_ops;
1224 struct bpf_prog *bpf_prog_get(u32 ufd);
1225 struct bpf_prog *bpf_prog_get_type_dev(u32 ufd, enum bpf_prog_type type,
1227 void bpf_prog_add(struct bpf_prog *prog, int i);
1228 void bpf_prog_sub(struct bpf_prog *prog, int i);
1229 void bpf_prog_inc(struct bpf_prog *prog);
1230 struct bpf_prog * __must_check bpf_prog_inc_not_zero(struct bpf_prog *prog);
1231 void bpf_prog_put(struct bpf_prog *prog);
1232 int __bpf_prog_charge(struct user_struct *user, u32 pages);
1233 void __bpf_prog_uncharge(struct user_struct *user, u32 pages);
1235 void bpf_prog_free_id(struct bpf_prog *prog, bool do_idr_lock);
1236 void bpf_map_free_id(struct bpf_map *map, bool do_idr_lock);
1238 struct bpf_map *bpf_map_get(u32 ufd);
1239 struct bpf_map *bpf_map_get_with_uref(u32 ufd);
1240 struct bpf_map *__bpf_map_get(struct fd f);
1241 void bpf_map_inc(struct bpf_map *map);
1242 void bpf_map_inc_with_uref(struct bpf_map *map);
1243 struct bpf_map * __must_check bpf_map_inc_not_zero(struct bpf_map *map);
1244 void bpf_map_put_with_uref(struct bpf_map *map);
1245 void bpf_map_put(struct bpf_map *map);
1246 int bpf_map_charge_memlock(struct bpf_map *map, u32 pages);
1247 void bpf_map_uncharge_memlock(struct bpf_map *map, u32 pages);
1248 int bpf_map_charge_init(struct bpf_map_memory *mem, u64 size);
1249 void bpf_map_charge_finish(struct bpf_map_memory *mem);
1250 void bpf_map_charge_move(struct bpf_map_memory *dst,
1251 struct bpf_map_memory *src);
1252 void *bpf_map_area_alloc(u64 size, int numa_node);
1253 void *bpf_map_area_mmapable_alloc(u64 size, int numa_node);
1254 void bpf_map_area_free(void *base);
1255 void bpf_map_init_from_attr(struct bpf_map *map, union bpf_attr *attr);
1256 int generic_map_lookup_batch(struct bpf_map *map,
1257 const union bpf_attr *attr,
1258 union bpf_attr __user *uattr);
1259 int generic_map_update_batch(struct bpf_map *map,
1260 const union bpf_attr *attr,
1261 union bpf_attr __user *uattr);
1262 int generic_map_delete_batch(struct bpf_map *map,
1263 const union bpf_attr *attr,
1264 union bpf_attr __user *uattr);
1265 struct bpf_map *bpf_map_get_curr_or_next(u32 *id);
1266 struct bpf_prog *bpf_prog_get_curr_or_next(u32 *id);
1268 extern int sysctl_unprivileged_bpf_disabled;
1270 static inline bool bpf_allow_ptr_leaks(void)
1272 return perfmon_capable();
1275 static inline bool bpf_allow_uninit_stack(void)
1277 return perfmon_capable();
1280 static inline bool bpf_allow_ptr_to_map_access(void)
1282 return perfmon_capable();
1285 static inline bool bpf_bypass_spec_v1(void)
1287 return perfmon_capable();
1290 static inline bool bpf_bypass_spec_v4(void)
1292 return perfmon_capable();
1295 int bpf_map_new_fd(struct bpf_map *map, int flags);
1296 int bpf_prog_new_fd(struct bpf_prog *prog);
1298 void bpf_link_init(struct bpf_link *link, enum bpf_link_type type,
1299 const struct bpf_link_ops *ops, struct bpf_prog *prog);
1300 int bpf_link_prime(struct bpf_link *link, struct bpf_link_primer *primer);
1301 int bpf_link_settle(struct bpf_link_primer *primer);
1302 void bpf_link_cleanup(struct bpf_link_primer *primer);
1303 void bpf_link_inc(struct bpf_link *link);
1304 void bpf_link_put(struct bpf_link *link);
1305 int bpf_link_new_fd(struct bpf_link *link);
1306 struct file *bpf_link_new_file(struct bpf_link *link, int *reserved_fd);
1307 struct bpf_link *bpf_link_get_from_fd(u32 ufd);
1309 int bpf_obj_pin_user(u32 ufd, const char __user *pathname);
1310 int bpf_obj_get_user(const char __user *pathname, int flags);
1312 #define BPF_ITER_FUNC_PREFIX "bpf_iter_"
1313 #define DEFINE_BPF_ITER_FUNC(target, args...) \
1314 extern int bpf_iter_ ## target(args); \
1315 int __init bpf_iter_ ## target(args) { return 0; }
1317 struct bpf_iter_aux_info {
1318 struct bpf_map *map;
1321 typedef int (*bpf_iter_attach_target_t)(struct bpf_prog *prog,
1322 union bpf_iter_link_info *linfo,
1323 struct bpf_iter_aux_info *aux);
1324 typedef void (*bpf_iter_detach_target_t)(struct bpf_iter_aux_info *aux);
1325 typedef void (*bpf_iter_show_fdinfo_t) (const struct bpf_iter_aux_info *aux,
1326 struct seq_file *seq);
1327 typedef int (*bpf_iter_fill_link_info_t)(const struct bpf_iter_aux_info *aux,
1328 struct bpf_link_info *info);
1330 #define BPF_ITER_CTX_ARG_MAX 2
1331 struct bpf_iter_reg {
1333 bpf_iter_attach_target_t attach_target;
1334 bpf_iter_detach_target_t detach_target;
1335 bpf_iter_show_fdinfo_t show_fdinfo;
1336 bpf_iter_fill_link_info_t fill_link_info;
1337 u32 ctx_arg_info_size;
1338 struct bpf_ctx_arg_aux ctx_arg_info[BPF_ITER_CTX_ARG_MAX];
1339 const struct bpf_iter_seq_info *seq_info;
1342 struct bpf_iter_meta {
1343 __bpf_md_ptr(struct seq_file *, seq);
1348 struct bpf_iter__bpf_map_elem {
1349 __bpf_md_ptr(struct bpf_iter_meta *, meta);
1350 __bpf_md_ptr(struct bpf_map *, map);
1351 __bpf_md_ptr(void *, key);
1352 __bpf_md_ptr(void *, value);
1355 int bpf_iter_reg_target(const struct bpf_iter_reg *reg_info);
1356 void bpf_iter_unreg_target(const struct bpf_iter_reg *reg_info);
1357 bool bpf_iter_prog_supported(struct bpf_prog *prog);
1358 int bpf_iter_link_attach(const union bpf_attr *attr, struct bpf_prog *prog);
1359 int bpf_iter_new_fd(struct bpf_link *link);
1360 bool bpf_link_is_iter(struct bpf_link *link);
1361 struct bpf_prog *bpf_iter_get_info(struct bpf_iter_meta *meta, bool in_stop);
1362 int bpf_iter_run_prog(struct bpf_prog *prog, void *ctx);
1363 void bpf_iter_map_show_fdinfo(const struct bpf_iter_aux_info *aux,
1364 struct seq_file *seq);
1365 int bpf_iter_map_fill_link_info(const struct bpf_iter_aux_info *aux,
1366 struct bpf_link_info *info);
1368 int bpf_percpu_hash_copy(struct bpf_map *map, void *key, void *value);
1369 int bpf_percpu_array_copy(struct bpf_map *map, void *key, void *value);
1370 int bpf_percpu_hash_update(struct bpf_map *map, void *key, void *value,
1372 int bpf_percpu_array_update(struct bpf_map *map, void *key, void *value,
1375 int bpf_stackmap_copy(struct bpf_map *map, void *key, void *value);
1377 int bpf_fd_array_map_update_elem(struct bpf_map *map, struct file *map_file,
1378 void *key, void *value, u64 map_flags);
1379 int bpf_fd_array_map_lookup_elem(struct bpf_map *map, void *key, u32 *value);
1380 int bpf_fd_htab_map_update_elem(struct bpf_map *map, struct file *map_file,
1381 void *key, void *value, u64 map_flags);
1382 int bpf_fd_htab_map_lookup_elem(struct bpf_map *map, void *key, u32 *value);
1384 int bpf_get_file_flag(int flags);
1385 int bpf_check_uarg_tail_zero(void __user *uaddr, size_t expected_size,
1386 size_t actual_size);
1388 /* memcpy that is used with 8-byte aligned pointers, power-of-8 size and
1389 * forced to use 'long' read/writes to try to atomically copy long counters.
1390 * Best-effort only. No barriers here, since it _will_ race with concurrent
1391 * updates from BPF programs. Called from bpf syscall and mostly used with
1392 * size 8 or 16 bytes, so ask compiler to inline it.
1394 static inline void bpf_long_memcpy(void *dst, const void *src, u32 size)
1396 const long *lsrc = src;
1399 size /= sizeof(long);
1404 /* verify correctness of eBPF program */
1405 int bpf_check(struct bpf_prog **fp, union bpf_attr *attr,
1406 union bpf_attr __user *uattr);
1408 #ifndef CONFIG_BPF_JIT_ALWAYS_ON
1409 void bpf_patch_call_args(struct bpf_insn *insn, u32 stack_depth);
1412 struct btf *bpf_get_btf_vmlinux(void);
1418 struct bpf_dtab_netdev *__dev_map_lookup_elem(struct bpf_map *map, u32 key);
1419 struct bpf_dtab_netdev *__dev_map_hash_lookup_elem(struct bpf_map *map, u32 key);
1420 void __dev_flush(void);
1421 int dev_xdp_enqueue(struct net_device *dev, struct xdp_buff *xdp,
1422 struct net_device *dev_rx);
1423 int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp,
1424 struct net_device *dev_rx);
1425 int dev_map_generic_redirect(struct bpf_dtab_netdev *dst, struct sk_buff *skb,
1426 struct bpf_prog *xdp_prog);
1427 bool dev_map_can_have_prog(struct bpf_map *map);
1429 struct bpf_cpu_map_entry *__cpu_map_lookup_elem(struct bpf_map *map, u32 key);
1430 void __cpu_map_flush(void);
1431 int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu, struct xdp_buff *xdp,
1432 struct net_device *dev_rx);
1433 bool cpu_map_prog_allowed(struct bpf_map *map);
1435 /* Return map's numa specified by userspace */
1436 static inline int bpf_map_attr_numa_node(const union bpf_attr *attr)
1438 return (attr->map_flags & BPF_F_NUMA_NODE) ?
1439 attr->numa_node : NUMA_NO_NODE;
1442 struct bpf_prog *bpf_prog_get_type_path(const char *name, enum bpf_prog_type type);
1443 int array_map_alloc_check(union bpf_attr *attr);
1445 int bpf_prog_test_run_xdp(struct bpf_prog *prog, const union bpf_attr *kattr,
1446 union bpf_attr __user *uattr);
1447 int bpf_prog_test_run_skb(struct bpf_prog *prog, const union bpf_attr *kattr,
1448 union bpf_attr __user *uattr);
1449 int bpf_prog_test_run_tracing(struct bpf_prog *prog,
1450 const union bpf_attr *kattr,
1451 union bpf_attr __user *uattr);
1452 int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog,
1453 const union bpf_attr *kattr,
1454 union bpf_attr __user *uattr);
1455 int bpf_prog_test_run_raw_tp(struct bpf_prog *prog,
1456 const union bpf_attr *kattr,
1457 union bpf_attr __user *uattr);
1458 bool btf_ctx_access(int off, int size, enum bpf_access_type type,
1459 const struct bpf_prog *prog,
1460 struct bpf_insn_access_aux *info);
1461 int btf_struct_access(struct bpf_verifier_log *log,
1462 const struct btf_type *t, int off, int size,
1463 enum bpf_access_type atype,
1465 bool btf_struct_ids_match(struct bpf_verifier_log *log,
1466 int off, u32 id, u32 need_type_id);
1468 int btf_distill_func_proto(struct bpf_verifier_log *log,
1470 const struct btf_type *func_proto,
1471 const char *func_name,
1472 struct btf_func_model *m);
1474 struct bpf_reg_state;
1475 int btf_check_func_arg_match(struct bpf_verifier_env *env, int subprog,
1476 struct bpf_reg_state *regs);
1477 int btf_prepare_func_args(struct bpf_verifier_env *env, int subprog,
1478 struct bpf_reg_state *reg);
1479 int btf_check_type_match(struct bpf_verifier_log *log, const struct bpf_prog *prog,
1480 struct btf *btf, const struct btf_type *t);
1482 struct bpf_prog *bpf_prog_by_id(u32 id);
1483 struct bpf_link *bpf_link_by_id(u32 id);
1485 const struct bpf_func_proto *bpf_base_func_proto(enum bpf_func_id func_id);
1486 #else /* !CONFIG_BPF_SYSCALL */
1487 static inline struct bpf_prog *bpf_prog_get(u32 ufd)
1489 return ERR_PTR(-EOPNOTSUPP);
1492 static inline struct bpf_prog *bpf_prog_get_type_dev(u32 ufd,
1493 enum bpf_prog_type type,
1496 return ERR_PTR(-EOPNOTSUPP);
1499 static inline void bpf_prog_add(struct bpf_prog *prog, int i)
1503 static inline void bpf_prog_sub(struct bpf_prog *prog, int i)
1507 static inline void bpf_prog_put(struct bpf_prog *prog)
1511 static inline void bpf_prog_inc(struct bpf_prog *prog)
1515 static inline struct bpf_prog *__must_check
1516 bpf_prog_inc_not_zero(struct bpf_prog *prog)
1518 return ERR_PTR(-EOPNOTSUPP);
1521 static inline int __bpf_prog_charge(struct user_struct *user, u32 pages)
1526 static inline void __bpf_prog_uncharge(struct user_struct *user, u32 pages)
1530 static inline void bpf_link_init(struct bpf_link *link, enum bpf_link_type type,
1531 const struct bpf_link_ops *ops,
1532 struct bpf_prog *prog)
1536 static inline int bpf_link_prime(struct bpf_link *link,
1537 struct bpf_link_primer *primer)
1542 static inline int bpf_link_settle(struct bpf_link_primer *primer)
1547 static inline void bpf_link_cleanup(struct bpf_link_primer *primer)
1551 static inline void bpf_link_inc(struct bpf_link *link)
1555 static inline void bpf_link_put(struct bpf_link *link)
1559 static inline int bpf_obj_get_user(const char __user *pathname, int flags)
1564 static inline struct net_device *__dev_map_lookup_elem(struct bpf_map *map,
1570 static inline struct net_device *__dev_map_hash_lookup_elem(struct bpf_map *map,
1575 static inline bool dev_map_can_have_prog(struct bpf_map *map)
1580 static inline void __dev_flush(void)
1585 struct bpf_dtab_netdev;
1588 int dev_xdp_enqueue(struct net_device *dev, struct xdp_buff *xdp,
1589 struct net_device *dev_rx)
1595 int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp,
1596 struct net_device *dev_rx)
1603 static inline int dev_map_generic_redirect(struct bpf_dtab_netdev *dst,
1604 struct sk_buff *skb,
1605 struct bpf_prog *xdp_prog)
1611 struct bpf_cpu_map_entry *__cpu_map_lookup_elem(struct bpf_map *map, u32 key)
1616 static inline void __cpu_map_flush(void)
1620 static inline int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu,
1621 struct xdp_buff *xdp,
1622 struct net_device *dev_rx)
1627 static inline bool cpu_map_prog_allowed(struct bpf_map *map)
1632 static inline struct bpf_prog *bpf_prog_get_type_path(const char *name,
1633 enum bpf_prog_type type)
1635 return ERR_PTR(-EOPNOTSUPP);
1638 static inline int bpf_prog_test_run_xdp(struct bpf_prog *prog,
1639 const union bpf_attr *kattr,
1640 union bpf_attr __user *uattr)
1645 static inline int bpf_prog_test_run_skb(struct bpf_prog *prog,
1646 const union bpf_attr *kattr,
1647 union bpf_attr __user *uattr)
1652 static inline int bpf_prog_test_run_tracing(struct bpf_prog *prog,
1653 const union bpf_attr *kattr,
1654 union bpf_attr __user *uattr)
1659 static inline int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog,
1660 const union bpf_attr *kattr,
1661 union bpf_attr __user *uattr)
1666 static inline void bpf_map_put(struct bpf_map *map)
1670 static inline struct bpf_prog *bpf_prog_by_id(u32 id)
1672 return ERR_PTR(-ENOTSUPP);
1675 static inline const struct bpf_func_proto *
1676 bpf_base_func_proto(enum bpf_func_id func_id)
1680 #endif /* CONFIG_BPF_SYSCALL */
1682 static inline struct bpf_prog *bpf_prog_get_type(u32 ufd,
1683 enum bpf_prog_type type)
1685 return bpf_prog_get_type_dev(ufd, type, false);
1688 void __bpf_free_used_maps(struct bpf_prog_aux *aux,
1689 struct bpf_map **used_maps, u32 len);
1691 bool bpf_prog_get_ok(struct bpf_prog *, enum bpf_prog_type *, bool);
1693 int bpf_prog_offload_compile(struct bpf_prog *prog);
1694 void bpf_prog_offload_destroy(struct bpf_prog *prog);
1695 int bpf_prog_offload_info_fill(struct bpf_prog_info *info,
1696 struct bpf_prog *prog);
1698 int bpf_map_offload_info_fill(struct bpf_map_info *info, struct bpf_map *map);
1700 int bpf_map_offload_lookup_elem(struct bpf_map *map, void *key, void *value);
1701 int bpf_map_offload_update_elem(struct bpf_map *map,
1702 void *key, void *value, u64 flags);
1703 int bpf_map_offload_delete_elem(struct bpf_map *map, void *key);
1704 int bpf_map_offload_get_next_key(struct bpf_map *map,
1705 void *key, void *next_key);
1707 bool bpf_offload_prog_map_match(struct bpf_prog *prog, struct bpf_map *map);
1709 struct bpf_offload_dev *
1710 bpf_offload_dev_create(const struct bpf_prog_offload_ops *ops, void *priv);
1711 void bpf_offload_dev_destroy(struct bpf_offload_dev *offdev);
1712 void *bpf_offload_dev_priv(struct bpf_offload_dev *offdev);
1713 int bpf_offload_dev_netdev_register(struct bpf_offload_dev *offdev,
1714 struct net_device *netdev);
1715 void bpf_offload_dev_netdev_unregister(struct bpf_offload_dev *offdev,
1716 struct net_device *netdev);
1717 bool bpf_offload_dev_match(struct bpf_prog *prog, struct net_device *netdev);
1719 #if defined(CONFIG_NET) && defined(CONFIG_BPF_SYSCALL)
1720 int bpf_prog_offload_init(struct bpf_prog *prog, union bpf_attr *attr);
1722 static inline bool bpf_prog_is_dev_bound(const struct bpf_prog_aux *aux)
1724 return aux->offload_requested;
1727 static inline bool bpf_map_is_dev_bound(struct bpf_map *map)
1729 return unlikely(map->ops == &bpf_map_offload_ops);
1732 struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr);
1733 void bpf_map_offload_map_free(struct bpf_map *map);
1735 static inline int bpf_prog_offload_init(struct bpf_prog *prog,
1736 union bpf_attr *attr)
1741 static inline bool bpf_prog_is_dev_bound(struct bpf_prog_aux *aux)
1746 static inline bool bpf_map_is_dev_bound(struct bpf_map *map)
1751 static inline struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr)
1753 return ERR_PTR(-EOPNOTSUPP);
1756 static inline void bpf_map_offload_map_free(struct bpf_map *map)
1759 #endif /* CONFIG_NET && CONFIG_BPF_SYSCALL */
1761 #if defined(CONFIG_BPF_STREAM_PARSER)
1762 int sock_map_prog_update(struct bpf_map *map, struct bpf_prog *prog,
1763 struct bpf_prog *old, u32 which);
1764 int sock_map_get_from_fd(const union bpf_attr *attr, struct bpf_prog *prog);
1765 int sock_map_prog_detach(const union bpf_attr *attr, enum bpf_prog_type ptype);
1766 int sock_map_update_elem_sys(struct bpf_map *map, void *key, void *value, u64 flags);
1767 void sock_map_unhash(struct sock *sk);
1768 void sock_map_close(struct sock *sk, long timeout);
1770 static inline int sock_map_prog_update(struct bpf_map *map,
1771 struct bpf_prog *prog,
1772 struct bpf_prog *old, u32 which)
1777 static inline int sock_map_get_from_fd(const union bpf_attr *attr,
1778 struct bpf_prog *prog)
1783 static inline int sock_map_prog_detach(const union bpf_attr *attr,
1784 enum bpf_prog_type ptype)
1789 static inline int sock_map_update_elem_sys(struct bpf_map *map, void *key, void *value,
1794 #endif /* CONFIG_BPF_STREAM_PARSER */
1796 #if defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL)
1797 void bpf_sk_reuseport_detach(struct sock *sk);
1798 int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map, void *key,
1800 int bpf_fd_reuseport_array_update_elem(struct bpf_map *map, void *key,
1801 void *value, u64 map_flags);
1803 static inline void bpf_sk_reuseport_detach(struct sock *sk)
1807 #ifdef CONFIG_BPF_SYSCALL
1808 static inline int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map,
1809 void *key, void *value)
1814 static inline int bpf_fd_reuseport_array_update_elem(struct bpf_map *map,
1815 void *key, void *value,
1820 #endif /* CONFIG_BPF_SYSCALL */
1821 #endif /* defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL) */
1823 /* verifier prototypes for helper functions called from eBPF programs */
1824 extern const struct bpf_func_proto bpf_map_lookup_elem_proto;
1825 extern const struct bpf_func_proto bpf_map_update_elem_proto;
1826 extern const struct bpf_func_proto bpf_map_delete_elem_proto;
1827 extern const struct bpf_func_proto bpf_map_push_elem_proto;
1828 extern const struct bpf_func_proto bpf_map_pop_elem_proto;
1829 extern const struct bpf_func_proto bpf_map_peek_elem_proto;
1831 extern const struct bpf_func_proto bpf_get_prandom_u32_proto;
1832 extern const struct bpf_func_proto bpf_get_smp_processor_id_proto;
1833 extern const struct bpf_func_proto bpf_get_numa_node_id_proto;
1834 extern const struct bpf_func_proto bpf_tail_call_proto;
1835 extern const struct bpf_func_proto bpf_ktime_get_ns_proto;
1836 extern const struct bpf_func_proto bpf_ktime_get_boot_ns_proto;
1837 extern const struct bpf_func_proto bpf_get_current_pid_tgid_proto;
1838 extern const struct bpf_func_proto bpf_get_current_uid_gid_proto;
1839 extern const struct bpf_func_proto bpf_get_current_comm_proto;
1840 extern const struct bpf_func_proto bpf_get_stackid_proto;
1841 extern const struct bpf_func_proto bpf_get_stack_proto;
1842 extern const struct bpf_func_proto bpf_get_task_stack_proto;
1843 extern const struct bpf_func_proto bpf_get_stackid_proto_pe;
1844 extern const struct bpf_func_proto bpf_get_stack_proto_pe;
1845 extern const struct bpf_func_proto bpf_sock_map_update_proto;
1846 extern const struct bpf_func_proto bpf_sock_hash_update_proto;
1847 extern const struct bpf_func_proto bpf_get_current_cgroup_id_proto;
1848 extern const struct bpf_func_proto bpf_get_current_ancestor_cgroup_id_proto;
1849 extern const struct bpf_func_proto bpf_msg_redirect_hash_proto;
1850 extern const struct bpf_func_proto bpf_msg_redirect_map_proto;
1851 extern const struct bpf_func_proto bpf_sk_redirect_hash_proto;
1852 extern const struct bpf_func_proto bpf_sk_redirect_map_proto;
1853 extern const struct bpf_func_proto bpf_spin_lock_proto;
1854 extern const struct bpf_func_proto bpf_spin_unlock_proto;
1855 extern const struct bpf_func_proto bpf_get_local_storage_proto;
1856 extern const struct bpf_func_proto bpf_strtol_proto;
1857 extern const struct bpf_func_proto bpf_strtoul_proto;
1858 extern const struct bpf_func_proto bpf_tcp_sock_proto;
1859 extern const struct bpf_func_proto bpf_jiffies64_proto;
1860 extern const struct bpf_func_proto bpf_get_ns_current_pid_tgid_proto;
1861 extern const struct bpf_func_proto bpf_event_output_data_proto;
1862 extern const struct bpf_func_proto bpf_ringbuf_output_proto;
1863 extern const struct bpf_func_proto bpf_ringbuf_reserve_proto;
1864 extern const struct bpf_func_proto bpf_ringbuf_submit_proto;
1865 extern const struct bpf_func_proto bpf_ringbuf_discard_proto;
1866 extern const struct bpf_func_proto bpf_ringbuf_query_proto;
1867 extern const struct bpf_func_proto bpf_skc_to_tcp6_sock_proto;
1868 extern const struct bpf_func_proto bpf_skc_to_tcp_sock_proto;
1869 extern const struct bpf_func_proto bpf_skc_to_tcp_timewait_sock_proto;
1870 extern const struct bpf_func_proto bpf_skc_to_tcp_request_sock_proto;
1871 extern const struct bpf_func_proto bpf_skc_to_udp6_sock_proto;
1872 extern const struct bpf_func_proto bpf_copy_from_user_proto;
1873 extern const struct bpf_func_proto bpf_snprintf_btf_proto;
1874 extern const struct bpf_func_proto bpf_per_cpu_ptr_proto;
1875 extern const struct bpf_func_proto bpf_this_cpu_ptr_proto;
1877 const struct bpf_func_proto *bpf_tracing_func_proto(
1878 enum bpf_func_id func_id, const struct bpf_prog *prog);
1880 const struct bpf_func_proto *tracing_prog_func_proto(
1881 enum bpf_func_id func_id, const struct bpf_prog *prog);
1883 /* Shared helpers among cBPF and eBPF. */
1884 void bpf_user_rnd_init_once(void);
1885 u64 bpf_user_rnd_u32(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
1886 u64 bpf_get_raw_cpu_id(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
1888 #if defined(CONFIG_NET)
1889 bool bpf_sock_common_is_valid_access(int off, int size,
1890 enum bpf_access_type type,
1891 struct bpf_insn_access_aux *info);
1892 bool bpf_sock_is_valid_access(int off, int size, enum bpf_access_type type,
1893 struct bpf_insn_access_aux *info);
1894 u32 bpf_sock_convert_ctx_access(enum bpf_access_type type,
1895 const struct bpf_insn *si,
1896 struct bpf_insn *insn_buf,
1897 struct bpf_prog *prog,
1900 static inline bool bpf_sock_common_is_valid_access(int off, int size,
1901 enum bpf_access_type type,
1902 struct bpf_insn_access_aux *info)
1906 static inline bool bpf_sock_is_valid_access(int off, int size,
1907 enum bpf_access_type type,
1908 struct bpf_insn_access_aux *info)
1912 static inline u32 bpf_sock_convert_ctx_access(enum bpf_access_type type,
1913 const struct bpf_insn *si,
1914 struct bpf_insn *insn_buf,
1915 struct bpf_prog *prog,
1923 struct sk_reuseport_kern {
1924 struct sk_buff *skb;
1926 struct sock *selected_sk;
1932 bool bpf_tcp_sock_is_valid_access(int off, int size, enum bpf_access_type type,
1933 struct bpf_insn_access_aux *info);
1935 u32 bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type,
1936 const struct bpf_insn *si,
1937 struct bpf_insn *insn_buf,
1938 struct bpf_prog *prog,
1941 bool bpf_xdp_sock_is_valid_access(int off, int size, enum bpf_access_type type,
1942 struct bpf_insn_access_aux *info);
1944 u32 bpf_xdp_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,
1950 static inline bool bpf_tcp_sock_is_valid_access(int off, int size,
1951 enum bpf_access_type type,
1952 struct bpf_insn_access_aux *info)
1957 static inline u32 bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type,
1958 const struct bpf_insn *si,
1959 struct bpf_insn *insn_buf,
1960 struct bpf_prog *prog,
1965 static inline bool bpf_xdp_sock_is_valid_access(int off, int size,
1966 enum bpf_access_type type,
1967 struct bpf_insn_access_aux *info)
1972 static inline u32 bpf_xdp_sock_convert_ctx_access(enum bpf_access_type type,
1973 const struct bpf_insn *si,
1974 struct bpf_insn *insn_buf,
1975 struct bpf_prog *prog,
1980 #endif /* CONFIG_INET */
1982 enum bpf_text_poke_type {
1987 int bpf_arch_text_poke(void *ip, enum bpf_text_poke_type t,
1988 void *addr1, void *addr2);
1991 bool btf_id_set_contains(const struct btf_id_set *set, u32 id);
1993 #endif /* _LINUX_BPF_H */