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 /* If need_defer is true, the implementation should guarantee that
86 * the to-be-put element is still alive before the bpf program, which
87 * may manipulate it, exists.
89 void (*map_fd_put_ptr)(struct bpf_map *map, void *ptr, bool need_defer);
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;
141 struct bpf_map_memory {
143 struct user_struct *user;
147 /* The first two cachelines with read-mostly members of which some
148 * are also accessed in fast-path (e.g. ops, max_entries).
150 const struct bpf_map_ops *ops ____cacheline_aligned;
151 struct bpf_map *inner_map_meta;
152 #ifdef CONFIG_SECURITY
155 enum bpf_map_type map_type;
160 int spin_lock_off; /* >=0 valid offset, <0 error */
164 u32 btf_value_type_id;
166 struct bpf_map_memory memory;
167 char name[BPF_OBJ_NAME_LEN];
168 u32 btf_vmlinux_value_type_id;
170 bool frozen; /* write-once; write-protected by freeze_mutex */
173 /* The 3rd and 4th cacheline with misc members to avoid false sharing
174 * particularly with refcounting.
176 atomic64_t refcnt ____cacheline_aligned;
178 /* rcu is used before freeing and work is only used during freeing */
180 struct work_struct work;
183 struct mutex freeze_mutex;
185 bool free_after_mult_rcu_gp;
188 static inline bool map_value_has_spin_lock(const struct bpf_map *map)
190 return map->spin_lock_off >= 0;
193 static inline void check_and_init_map_lock(struct bpf_map *map, void *dst)
195 if (likely(!map_value_has_spin_lock(map)))
197 *(struct bpf_spin_lock *)(dst + map->spin_lock_off) =
198 (struct bpf_spin_lock){};
201 /* copy everything but bpf_spin_lock */
202 static inline void copy_map_value(struct bpf_map *map, void *dst, void *src)
204 if (unlikely(map_value_has_spin_lock(map))) {
205 u32 off = map->spin_lock_off;
207 memcpy(dst, src, off);
208 memcpy(dst + off + sizeof(struct bpf_spin_lock),
209 src + off + sizeof(struct bpf_spin_lock),
210 map->value_size - off - sizeof(struct bpf_spin_lock));
212 memcpy(dst, src, map->value_size);
215 void copy_map_value_locked(struct bpf_map *map, void *dst, void *src,
217 int bpf_obj_name_cpy(char *dst, const char *src, unsigned int size);
219 struct bpf_offload_dev;
220 struct bpf_offloaded_map;
222 struct bpf_map_dev_ops {
223 int (*map_get_next_key)(struct bpf_offloaded_map *map,
224 void *key, void *next_key);
225 int (*map_lookup_elem)(struct bpf_offloaded_map *map,
226 void *key, void *value);
227 int (*map_update_elem)(struct bpf_offloaded_map *map,
228 void *key, void *value, u64 flags);
229 int (*map_delete_elem)(struct bpf_offloaded_map *map, void *key);
232 struct bpf_offloaded_map {
234 struct net_device *netdev;
235 const struct bpf_map_dev_ops *dev_ops;
237 struct list_head offloads;
240 static inline struct bpf_offloaded_map *map_to_offmap(struct bpf_map *map)
242 return container_of(map, struct bpf_offloaded_map, map);
245 static inline bool bpf_map_offload_neutral(const struct bpf_map *map)
247 return map->map_type == BPF_MAP_TYPE_PERF_EVENT_ARRAY;
250 static inline bool bpf_map_support_seq_show(const struct bpf_map *map)
252 return (map->btf_value_type_id || map->btf_vmlinux_value_type_id) &&
253 map->ops->map_seq_show_elem;
256 int map_check_no_btf(const struct bpf_map *map,
257 const struct btf *btf,
258 const struct btf_type *key_type,
259 const struct btf_type *value_type);
261 bool bpf_map_meta_equal(const struct bpf_map *meta0,
262 const struct bpf_map *meta1);
264 extern const struct bpf_map_ops bpf_map_offload_ops;
266 /* function argument constraints */
268 ARG_DONTCARE = 0, /* unused argument in helper function */
270 /* the following constraints used to prototype
271 * bpf_map_lookup/update/delete_elem() functions
273 ARG_CONST_MAP_PTR, /* const argument used as pointer to bpf_map */
274 ARG_PTR_TO_MAP_KEY, /* pointer to stack used as map key */
275 ARG_PTR_TO_MAP_VALUE, /* pointer to stack used as map value */
276 ARG_PTR_TO_UNINIT_MAP_VALUE, /* pointer to valid memory used to store a map value */
277 ARG_PTR_TO_MAP_VALUE_OR_NULL, /* pointer to stack used as map value or NULL */
279 /* the following constraints used to prototype bpf_memcmp() and other
280 * functions that access data on eBPF program stack
282 ARG_PTR_TO_MEM, /* pointer to valid memory (stack, packet, map value) */
283 ARG_PTR_TO_MEM_OR_NULL, /* pointer to valid memory or NULL */
284 ARG_PTR_TO_UNINIT_MEM, /* pointer to memory does not need to be initialized,
285 * helper function must fill all bytes or clear
286 * them in error case.
289 ARG_CONST_SIZE, /* number of bytes accessed from memory */
290 ARG_CONST_SIZE_OR_ZERO, /* number of bytes accessed from memory or 0 */
292 ARG_PTR_TO_CTX, /* pointer to context */
293 ARG_PTR_TO_CTX_OR_NULL, /* pointer to context or NULL */
294 ARG_ANYTHING, /* any (initialized) argument is ok */
295 ARG_PTR_TO_SPIN_LOCK, /* pointer to bpf_spin_lock */
296 ARG_PTR_TO_SOCK_COMMON, /* pointer to sock_common */
297 ARG_PTR_TO_INT, /* pointer to int */
298 ARG_PTR_TO_LONG, /* pointer to long */
299 ARG_PTR_TO_SOCKET, /* pointer to bpf_sock (fullsock) */
300 ARG_PTR_TO_SOCKET_OR_NULL, /* pointer to bpf_sock (fullsock) or NULL */
301 ARG_PTR_TO_BTF_ID, /* pointer to in-kernel struct */
302 ARG_PTR_TO_ALLOC_MEM, /* pointer to dynamically allocated memory */
303 ARG_PTR_TO_ALLOC_MEM_OR_NULL, /* pointer to dynamically allocated memory or NULL */
304 ARG_CONST_ALLOC_SIZE_OR_ZERO, /* number of allocated bytes requested */
305 ARG_PTR_TO_BTF_ID_SOCK_COMMON, /* pointer to in-kernel sock_common or bpf-mirrored bpf_sock */
306 ARG_PTR_TO_PERCPU_BTF_ID, /* pointer to in-kernel percpu type */
310 /* type of values returned from helper functions */
311 enum bpf_return_type {
312 RET_INTEGER, /* function returns integer */
313 RET_VOID, /* function doesn't return anything */
314 RET_PTR_TO_MAP_VALUE, /* returns a pointer to map elem value */
315 RET_PTR_TO_MAP_VALUE_OR_NULL, /* returns a pointer to map elem value or NULL */
316 RET_PTR_TO_SOCKET_OR_NULL, /* returns a pointer to a socket or NULL */
317 RET_PTR_TO_TCP_SOCK_OR_NULL, /* returns a pointer to a tcp_sock or NULL */
318 RET_PTR_TO_SOCK_COMMON_OR_NULL, /* returns a pointer to a sock_common or NULL */
319 RET_PTR_TO_ALLOC_MEM_OR_NULL, /* returns a pointer to dynamically allocated memory or NULL */
320 RET_PTR_TO_BTF_ID_OR_NULL, /* returns a pointer to a btf_id or NULL */
321 RET_PTR_TO_MEM_OR_BTF_ID_OR_NULL, /* returns a pointer to a valid memory or a btf_id or NULL */
322 RET_PTR_TO_MEM_OR_BTF_ID, /* returns a pointer to a valid memory or a btf_id */
325 /* eBPF function prototype used by verifier to allow BPF_CALLs from eBPF programs
326 * to in-kernel helper functions and for adjusting imm32 field in BPF_CALL
327 * instructions after verifying
329 struct bpf_func_proto {
330 u64 (*func)(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
333 enum bpf_return_type ret_type;
336 enum bpf_arg_type arg1_type;
337 enum bpf_arg_type arg2_type;
338 enum bpf_arg_type arg3_type;
339 enum bpf_arg_type arg4_type;
340 enum bpf_arg_type arg5_type;
342 enum bpf_arg_type arg_type[5];
354 int *ret_btf_id; /* return value btf_id */
355 bool (*allowed)(const struct bpf_prog *prog);
358 /* bpf_context is intentionally undefined structure. Pointer to bpf_context is
359 * the first argument to eBPF programs.
360 * For socket filters: 'struct bpf_context *' == 'struct sk_buff *'
364 enum bpf_access_type {
369 /* types of values stored in eBPF registers */
370 /* Pointer types represent:
373 * pointer + (u16) var
374 * pointer + (u16) var + imm
375 * if (range > 0) then [ptr, ptr + range - off) is safe to access
376 * if (id > 0) means that some 'var' was added
377 * if (off > 0) means that 'imm' was added
380 NOT_INIT = 0, /* nothing was written into register */
381 SCALAR_VALUE, /* reg doesn't contain a valid pointer */
382 PTR_TO_CTX, /* reg points to bpf_context */
383 CONST_PTR_TO_MAP, /* reg points to struct bpf_map */
384 PTR_TO_MAP_VALUE, /* reg points to map element value */
385 PTR_TO_MAP_VALUE_OR_NULL,/* points to map elem value or NULL */
386 PTR_TO_STACK, /* reg == frame_pointer + offset */
387 PTR_TO_PACKET_META, /* skb->data - meta_len */
388 PTR_TO_PACKET, /* reg points to skb->data */
389 PTR_TO_PACKET_END, /* skb->data + headlen */
390 PTR_TO_FLOW_KEYS, /* reg points to bpf_flow_keys */
391 PTR_TO_SOCKET, /* reg points to struct bpf_sock */
392 PTR_TO_SOCKET_OR_NULL, /* reg points to struct bpf_sock or NULL */
393 PTR_TO_SOCK_COMMON, /* reg points to sock_common */
394 PTR_TO_SOCK_COMMON_OR_NULL, /* reg points to sock_common or NULL */
395 PTR_TO_TCP_SOCK, /* reg points to struct tcp_sock */
396 PTR_TO_TCP_SOCK_OR_NULL, /* reg points to struct tcp_sock or NULL */
397 PTR_TO_TP_BUFFER, /* reg points to a writable raw tp's buffer */
398 PTR_TO_XDP_SOCK, /* reg points to struct xdp_sock */
399 /* PTR_TO_BTF_ID points to a kernel struct that does not need
400 * to be null checked by the BPF program. This does not imply the
401 * pointer is _not_ null and in practice this can easily be a null
402 * pointer when reading pointer chains. The assumption is program
403 * context will handle null pointer dereference typically via fault
404 * handling. The verifier must keep this in mind and can make no
405 * assumptions about null or non-null when doing branch analysis.
406 * Further, when passed into helpers the helpers can not, without
407 * additional context, assume the value is non-null.
410 /* PTR_TO_BTF_ID_OR_NULL points to a kernel struct that has not
411 * been checked for null. Used primarily to inform the verifier
412 * an explicit null check is required for this struct.
414 PTR_TO_BTF_ID_OR_NULL,
415 PTR_TO_MEM, /* reg points to valid memory region */
416 PTR_TO_MEM_OR_NULL, /* reg points to valid memory region or NULL */
417 PTR_TO_RDONLY_BUF, /* reg points to a readonly buffer */
418 PTR_TO_RDONLY_BUF_OR_NULL, /* reg points to a readonly buffer or NULL */
419 PTR_TO_RDWR_BUF, /* reg points to a read/write buffer */
420 PTR_TO_RDWR_BUF_OR_NULL, /* reg points to a read/write buffer or NULL */
421 PTR_TO_PERCPU_BTF_ID, /* reg points to a percpu kernel variable */
424 /* The information passed from prog-specific *_is_valid_access
425 * back to the verifier.
427 struct bpf_insn_access_aux {
428 enum bpf_reg_type reg_type;
433 struct bpf_verifier_log *log; /* for verbose logs */
437 bpf_ctx_record_field_size(struct bpf_insn_access_aux *aux, u32 size)
439 aux->ctx_field_size = size;
442 struct bpf_prog_ops {
443 int (*test_run)(struct bpf_prog *prog, const union bpf_attr *kattr,
444 union bpf_attr __user *uattr);
447 struct bpf_verifier_ops {
448 /* return eBPF function prototype for verification */
449 const struct bpf_func_proto *
450 (*get_func_proto)(enum bpf_func_id func_id,
451 const struct bpf_prog *prog);
453 /* return true if 'size' wide access at offset 'off' within bpf_context
454 * with 'type' (read or write) is allowed
456 bool (*is_valid_access)(int off, int size, enum bpf_access_type type,
457 const struct bpf_prog *prog,
458 struct bpf_insn_access_aux *info);
459 int (*gen_prologue)(struct bpf_insn *insn, bool direct_write,
460 const struct bpf_prog *prog);
461 int (*gen_ld_abs)(const struct bpf_insn *orig,
462 struct bpf_insn *insn_buf);
463 u32 (*convert_ctx_access)(enum bpf_access_type type,
464 const struct bpf_insn *src,
465 struct bpf_insn *dst,
466 struct bpf_prog *prog, u32 *target_size);
467 int (*btf_struct_access)(struct bpf_verifier_log *log,
468 const struct btf_type *t, int off, int size,
469 enum bpf_access_type atype,
473 struct bpf_prog_offload_ops {
474 /* verifier basic callbacks */
475 int (*insn_hook)(struct bpf_verifier_env *env,
476 int insn_idx, int prev_insn_idx);
477 int (*finalize)(struct bpf_verifier_env *env);
478 /* verifier optimization callbacks (called after .finalize) */
479 int (*replace_insn)(struct bpf_verifier_env *env, u32 off,
480 struct bpf_insn *insn);
481 int (*remove_insns)(struct bpf_verifier_env *env, u32 off, u32 cnt);
482 /* program management callbacks */
483 int (*prepare)(struct bpf_prog *prog);
484 int (*translate)(struct bpf_prog *prog);
485 void (*destroy)(struct bpf_prog *prog);
488 struct bpf_prog_offload {
489 struct bpf_prog *prog;
490 struct net_device *netdev;
491 struct bpf_offload_dev *offdev;
493 struct list_head offloads;
500 enum bpf_cgroup_storage_type {
501 BPF_CGROUP_STORAGE_SHARED,
502 BPF_CGROUP_STORAGE_PERCPU,
503 __BPF_CGROUP_STORAGE_MAX
506 #define MAX_BPF_CGROUP_STORAGE_TYPE __BPF_CGROUP_STORAGE_MAX
508 /* The longest tracepoint has 12 args.
509 * See include/trace/bpf_probe.h
511 #define MAX_BPF_FUNC_ARGS 12
513 struct bpf_prog_stats {
516 struct u64_stats_sync syncp;
517 } __aligned(2 * sizeof(u64));
519 struct btf_func_model {
522 u8 arg_size[MAX_BPF_FUNC_ARGS];
525 /* Restore arguments before returning from trampoline to let original function
526 * continue executing. This flag is used for fentry progs when there are no
529 #define BPF_TRAMP_F_RESTORE_REGS BIT(0)
530 /* Call original function after fentry progs, but before fexit progs.
531 * Makes sense for fentry/fexit, normal calls and indirect calls.
533 #define BPF_TRAMP_F_CALL_ORIG BIT(1)
534 /* Skip current frame and return to parent. Makes sense for fentry/fexit
535 * programs only. Should not be used with normal calls and indirect calls.
537 #define BPF_TRAMP_F_SKIP_FRAME BIT(2)
538 /* Return the return value of fentry prog. Only used by bpf_struct_ops. */
539 #define BPF_TRAMP_F_RET_FENTRY_RET BIT(4)
541 /* Each call __bpf_prog_enter + call bpf_func + call __bpf_prog_exit is ~50
542 * bytes on x86. Pick a number to fit into BPF_IMAGE_SIZE / 2
544 #define BPF_MAX_TRAMP_PROGS 40
546 struct bpf_tramp_progs {
547 struct bpf_prog *progs[BPF_MAX_TRAMP_PROGS];
551 /* Different use cases for BPF trampoline:
552 * 1. replace nop at the function entry (kprobe equivalent)
553 * flags = BPF_TRAMP_F_RESTORE_REGS
554 * fentry = a set of programs to run before returning from trampoline
556 * 2. replace nop at the function entry (kprobe + kretprobe equivalent)
557 * flags = BPF_TRAMP_F_CALL_ORIG | BPF_TRAMP_F_SKIP_FRAME
558 * orig_call = fentry_ip + MCOUNT_INSN_SIZE
559 * fentry = a set of program to run before calling original function
560 * fexit = a set of program to run after original function
562 * 3. replace direct call instruction anywhere in the function body
563 * or assign a function pointer for indirect call (like tcp_congestion_ops->cong_avoid)
565 * fentry = a set of programs to run before returning from trampoline
566 * With flags = BPF_TRAMP_F_CALL_ORIG
567 * orig_call = original callback addr or direct function addr
568 * fentry = a set of program to run before calling original function
569 * fexit = a set of program to run after original function
571 struct bpf_tramp_image;
572 int arch_prepare_bpf_trampoline(struct bpf_tramp_image *tr, void *image, void *image_end,
573 const struct btf_func_model *m, u32 flags,
574 struct bpf_tramp_progs *tprogs,
576 /* these two functions are called from generated trampoline */
577 u64 notrace __bpf_prog_enter(void);
578 void notrace __bpf_prog_exit(struct bpf_prog *prog, u64 start);
579 void notrace __bpf_prog_enter_sleepable(void);
580 void notrace __bpf_prog_exit_sleepable(void);
581 void notrace __bpf_tramp_enter(struct bpf_tramp_image *tr);
582 void notrace __bpf_tramp_exit(struct bpf_tramp_image *tr);
587 char name[KSYM_NAME_LEN];
588 struct list_head lnode;
589 struct latch_tree_node tnode;
593 enum bpf_tramp_prog_type {
596 BPF_TRAMP_MODIFY_RETURN,
598 BPF_TRAMP_REPLACE, /* more than MAX */
601 struct bpf_tramp_image {
603 struct bpf_ksym ksym;
604 struct percpu_ref pcref;
609 struct work_struct work;
613 struct bpf_trampoline {
614 /* hlist for trampoline_table */
615 struct hlist_node hlist;
616 /* serializes access to fields of this trampoline */
621 struct btf_func_model model;
625 /* if !NULL this is BPF_PROG_TYPE_EXT program that extends another BPF
626 * program by replacing one of its functions. func.addr is the address
627 * of the function it replaced.
629 struct bpf_prog *extension_prog;
630 /* list of BPF programs using this trampoline */
631 struct hlist_head progs_hlist[BPF_TRAMP_MAX];
632 /* Number of attached programs. A counter per kind. */
633 int progs_cnt[BPF_TRAMP_MAX];
634 /* Executable image of trampoline */
635 struct bpf_tramp_image *cur_image;
639 struct bpf_attach_target_info {
640 struct btf_func_model fmodel;
642 const char *tgt_name;
643 const struct btf_type *tgt_type;
646 #define BPF_DISPATCHER_MAX 48 /* Fits in 2048B */
648 struct bpf_dispatcher_prog {
649 struct bpf_prog *prog;
653 struct bpf_dispatcher {
654 /* dispatcher mutex */
657 struct bpf_dispatcher_prog progs[BPF_DISPATCHER_MAX];
661 struct bpf_ksym ksym;
664 static __always_inline unsigned int bpf_dispatcher_nop_func(
666 const struct bpf_insn *insnsi,
667 unsigned int (*bpf_func)(const void *,
668 const struct bpf_insn *))
670 return bpf_func(ctx, insnsi);
672 #ifdef CONFIG_BPF_JIT
673 int bpf_trampoline_link_prog(struct bpf_prog *prog, struct bpf_trampoline *tr);
674 int bpf_trampoline_unlink_prog(struct bpf_prog *prog, struct bpf_trampoline *tr);
675 struct bpf_trampoline *bpf_trampoline_get(u64 key,
676 struct bpf_attach_target_info *tgt_info);
677 void bpf_trampoline_put(struct bpf_trampoline *tr);
678 int arch_prepare_bpf_dispatcher(void *image, s64 *funcs, int num_funcs);
679 #define BPF_DISPATCHER_INIT(_name) { \
680 .mutex = __MUTEX_INITIALIZER(_name.mutex), \
681 .func = &_name##_func, \
688 .lnode = LIST_HEAD_INIT(_name.ksym.lnode), \
692 #define DEFINE_BPF_DISPATCHER(name) \
693 noinline unsigned int bpf_dispatcher_##name##_func( \
695 const struct bpf_insn *insnsi, \
696 unsigned int (*bpf_func)(const void *, \
697 const struct bpf_insn *)) \
699 return bpf_func(ctx, insnsi); \
701 EXPORT_SYMBOL(bpf_dispatcher_##name##_func); \
702 struct bpf_dispatcher bpf_dispatcher_##name = \
703 BPF_DISPATCHER_INIT(bpf_dispatcher_##name);
704 #define DECLARE_BPF_DISPATCHER(name) \
705 unsigned int bpf_dispatcher_##name##_func( \
707 const struct bpf_insn *insnsi, \
708 unsigned int (*bpf_func)(const void *, \
709 const struct bpf_insn *)); \
710 extern struct bpf_dispatcher bpf_dispatcher_##name;
711 #define BPF_DISPATCHER_FUNC(name) bpf_dispatcher_##name##_func
712 #define BPF_DISPATCHER_PTR(name) (&bpf_dispatcher_##name)
713 void bpf_dispatcher_change_prog(struct bpf_dispatcher *d, struct bpf_prog *from,
714 struct bpf_prog *to);
715 /* Called only from JIT-enabled code, so there's no need for stubs. */
716 void *bpf_jit_alloc_exec_page(void);
717 void bpf_image_ksym_add(void *data, struct bpf_ksym *ksym);
718 void bpf_image_ksym_del(struct bpf_ksym *ksym);
719 void bpf_ksym_add(struct bpf_ksym *ksym);
720 void bpf_ksym_del(struct bpf_ksym *ksym);
721 int bpf_jit_charge_modmem(u32 pages);
722 void bpf_jit_uncharge_modmem(u32 pages);
724 static inline int bpf_trampoline_link_prog(struct bpf_prog *prog,
725 struct bpf_trampoline *tr)
729 static inline int bpf_trampoline_unlink_prog(struct bpf_prog *prog,
730 struct bpf_trampoline *tr)
734 static inline struct bpf_trampoline *bpf_trampoline_get(u64 key,
735 struct bpf_attach_target_info *tgt_info)
739 static inline void bpf_trampoline_put(struct bpf_trampoline *tr) {}
740 #define DEFINE_BPF_DISPATCHER(name)
741 #define DECLARE_BPF_DISPATCHER(name)
742 #define BPF_DISPATCHER_FUNC(name) bpf_dispatcher_nop_func
743 #define BPF_DISPATCHER_PTR(name) NULL
744 static inline void bpf_dispatcher_change_prog(struct bpf_dispatcher *d,
745 struct bpf_prog *from,
746 struct bpf_prog *to) {}
747 static inline bool is_bpf_image_address(unsigned long address)
753 struct bpf_func_info_aux {
758 enum bpf_jit_poke_reason {
759 BPF_POKE_REASON_TAIL_CALL,
762 /* Descriptor of pokes pointing /into/ the JITed image. */
763 struct bpf_jit_poke_descriptor {
764 void *tailcall_target;
765 void *tailcall_bypass;
774 bool tailcall_target_stable;
780 /* reg_type info for ctx arguments */
781 struct bpf_ctx_arg_aux {
783 enum bpf_reg_type reg_type;
787 struct bpf_prog_aux {
795 u32 func_cnt; /* used by non-func prog as the number of func progs */
796 u32 func_idx; /* 0 for non-func prog, the index in func array for func prog */
797 u32 attach_btf_id; /* in-kernel BTF type id to attach to */
798 u32 ctx_arg_info_size;
799 u32 max_rdonly_access;
801 const struct bpf_ctx_arg_aux *ctx_arg_info;
802 struct mutex dst_mutex; /* protects dst_* pointers below, *after* prog becomes visible */
803 struct bpf_prog *dst_prog;
804 struct bpf_trampoline *dst_trampoline;
805 enum bpf_prog_type saved_dst_prog_type;
806 enum bpf_attach_type saved_dst_attach_type;
807 bool verifier_zext; /* Zero extensions has been inserted by verifier. */
808 bool offload_requested;
809 bool attach_btf_trace; /* true if attaching to BTF-enabled raw tp */
810 bool func_proto_unreliable;
812 bool tail_call_reachable;
813 struct hlist_node tramp_hlist;
814 /* BTF_KIND_FUNC_PROTO for valid attach_btf_id */
815 const struct btf_type *attach_func_proto;
816 /* function name for valid attach_btf_id */
817 const char *attach_func_name;
818 struct bpf_prog **func;
819 void *jit_data; /* JIT specific data. arch dependent */
820 struct bpf_jit_poke_descriptor *poke_tab;
822 struct bpf_ksym ksym;
823 const struct bpf_prog_ops *ops;
824 struct bpf_map **used_maps;
825 struct mutex used_maps_mutex; /* mutex for used_maps and used_map_cnt */
826 struct bpf_prog *prog;
827 struct user_struct *user;
828 u64 load_time; /* ns since boottime */
829 struct bpf_map *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE];
830 char name[BPF_OBJ_NAME_LEN];
831 #ifdef CONFIG_SECURITY
834 struct bpf_prog_offload *offload;
836 struct bpf_func_info *func_info;
837 struct bpf_func_info_aux *func_info_aux;
838 /* bpf_line_info loaded from userspace. linfo->insn_off
839 * has the xlated insn offset.
840 * Both the main and sub prog share the same linfo.
841 * The subprog can access its first linfo by
842 * using the linfo_idx.
844 struct bpf_line_info *linfo;
845 /* jited_linfo is the jited addr of the linfo. It has a
846 * one to one mapping to linfo:
847 * jited_linfo[i] is the jited addr for the linfo[i]->insn_off.
848 * Both the main and sub prog share the same jited_linfo.
849 * The subprog can access its first jited_linfo by
850 * using the linfo_idx.
855 /* subprog can use linfo_idx to access its first linfo and
857 * main prog always has linfo_idx == 0
861 struct exception_table_entry *extable;
862 struct bpf_prog_stats __percpu *stats;
864 struct work_struct work;
869 struct bpf_array_aux {
870 /* 'Ownership' of prog array is claimed by the first program that
871 * is going to use this map or by the first program which FD is
872 * stored in the map to make sure that all callers and callees have
873 * the same prog type and JITed flag.
877 enum bpf_prog_type type;
880 /* Programs with direct jumps into programs part of this array. */
881 struct list_head poke_progs;
883 struct mutex poke_mutex;
884 struct work_struct work;
890 enum bpf_link_type type;
891 const struct bpf_link_ops *ops;
892 struct bpf_prog *prog;
893 struct work_struct work;
896 struct bpf_link_ops {
897 void (*release)(struct bpf_link *link);
898 void (*dealloc)(struct bpf_link *link);
899 int (*detach)(struct bpf_link *link);
900 int (*update_prog)(struct bpf_link *link, struct bpf_prog *new_prog,
901 struct bpf_prog *old_prog);
902 void (*show_fdinfo)(const struct bpf_link *link, struct seq_file *seq);
903 int (*fill_link_info)(const struct bpf_link *link,
904 struct bpf_link_info *info);
907 struct bpf_link_primer {
908 struct bpf_link *link;
914 struct bpf_struct_ops_value;
918 #define BPF_STRUCT_OPS_MAX_NR_MEMBERS 64
919 struct bpf_struct_ops {
920 const struct bpf_verifier_ops *verifier_ops;
921 int (*init)(struct btf *btf);
922 int (*check_member)(const struct btf_type *t,
923 const struct btf_member *member);
924 int (*init_member)(const struct btf_type *t,
925 const struct btf_member *member,
926 void *kdata, const void *udata);
927 int (*reg)(void *kdata);
928 void (*unreg)(void *kdata);
929 const struct btf_type *type;
930 const struct btf_type *value_type;
932 struct btf_func_model func_models[BPF_STRUCT_OPS_MAX_NR_MEMBERS];
937 #if defined(CONFIG_BPF_JIT) && defined(CONFIG_BPF_SYSCALL)
938 #define BPF_MODULE_OWNER ((void *)((0xeB9FUL << 2) + POISON_POINTER_DELTA))
939 const struct bpf_struct_ops *bpf_struct_ops_find(u32 type_id);
940 void bpf_struct_ops_init(struct btf *btf, struct bpf_verifier_log *log);
941 bool bpf_struct_ops_get(const void *kdata);
942 void bpf_struct_ops_put(const void *kdata);
943 int bpf_struct_ops_map_sys_lookup_elem(struct bpf_map *map, void *key,
945 static inline bool bpf_try_module_get(const void *data, struct module *owner)
947 if (owner == BPF_MODULE_OWNER)
948 return bpf_struct_ops_get(data);
950 return try_module_get(owner);
952 static inline void bpf_module_put(const void *data, struct module *owner)
954 if (owner == BPF_MODULE_OWNER)
955 bpf_struct_ops_put(data);
960 static inline const struct bpf_struct_ops *bpf_struct_ops_find(u32 type_id)
964 static inline void bpf_struct_ops_init(struct btf *btf,
965 struct bpf_verifier_log *log)
968 static inline bool bpf_try_module_get(const void *data, struct module *owner)
970 return try_module_get(owner);
972 static inline void bpf_module_put(const void *data, struct module *owner)
976 static inline int bpf_struct_ops_map_sys_lookup_elem(struct bpf_map *map,
988 struct bpf_array_aux *aux;
990 char value[0] __aligned(8);
991 void *ptrs[0] __aligned(8);
992 void __percpu *pptrs[0] __aligned(8);
996 #define BPF_COMPLEXITY_LIMIT_INSNS 1000000 /* yes. 1M insns */
997 #define MAX_TAIL_CALL_CNT 32
999 #define BPF_F_ACCESS_MASK (BPF_F_RDONLY | \
1000 BPF_F_RDONLY_PROG | \
1004 #define BPF_MAP_CAN_READ BIT(0)
1005 #define BPF_MAP_CAN_WRITE BIT(1)
1007 static inline u32 bpf_map_flags_to_cap(struct bpf_map *map)
1009 u32 access_flags = map->map_flags & (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG);
1011 /* Combination of BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG is
1014 if (access_flags & BPF_F_RDONLY_PROG)
1015 return BPF_MAP_CAN_READ;
1016 else if (access_flags & BPF_F_WRONLY_PROG)
1017 return BPF_MAP_CAN_WRITE;
1019 return BPF_MAP_CAN_READ | BPF_MAP_CAN_WRITE;
1022 static inline bool bpf_map_flags_access_ok(u32 access_flags)
1024 return (access_flags & (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG)) !=
1025 (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG);
1028 struct bpf_event_entry {
1029 struct perf_event *event;
1030 struct file *perf_file;
1031 struct file *map_file;
1032 struct rcu_head rcu;
1035 bool bpf_prog_array_compatible(struct bpf_array *array, const struct bpf_prog *fp);
1036 int bpf_prog_calc_tag(struct bpf_prog *fp);
1037 const char *kernel_type_name(u32 btf_type_id);
1039 const struct bpf_func_proto *bpf_get_trace_printk_proto(void);
1041 typedef unsigned long (*bpf_ctx_copy_t)(void *dst, const void *src,
1042 unsigned long off, unsigned long len);
1043 typedef u32 (*bpf_convert_ctx_access_t)(enum bpf_access_type type,
1044 const struct bpf_insn *src,
1045 struct bpf_insn *dst,
1046 struct bpf_prog *prog,
1049 u64 bpf_event_output(struct bpf_map *map, u64 flags, void *meta, u64 meta_size,
1050 void *ctx, u64 ctx_size, bpf_ctx_copy_t ctx_copy);
1052 /* an array of programs to be executed under rcu_lock.
1055 * ret = BPF_PROG_RUN_ARRAY(&bpf_prog_array, ctx, BPF_PROG_RUN);
1057 * the structure returned by bpf_prog_array_alloc() should be populated
1058 * with program pointers and the last pointer must be NULL.
1059 * The user has to keep refcnt on the program and make sure the program
1060 * is removed from the array before bpf_prog_put().
1061 * The 'struct bpf_prog_array *' should only be replaced with xchg()
1062 * since other cpus are walking the array of pointers in parallel.
1064 struct bpf_prog_array_item {
1065 struct bpf_prog *prog;
1066 struct bpf_cgroup_storage *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE];
1069 struct bpf_prog_array {
1070 struct rcu_head rcu;
1071 struct bpf_prog_array_item items[];
1074 struct bpf_prog_array *bpf_prog_array_alloc(u32 prog_cnt, gfp_t flags);
1075 void bpf_prog_array_free(struct bpf_prog_array *progs);
1076 int bpf_prog_array_length(struct bpf_prog_array *progs);
1077 bool bpf_prog_array_is_empty(struct bpf_prog_array *array);
1078 int bpf_prog_array_copy_to_user(struct bpf_prog_array *progs,
1079 __u32 __user *prog_ids, u32 cnt);
1081 void bpf_prog_array_delete_safe(struct bpf_prog_array *progs,
1082 struct bpf_prog *old_prog);
1083 int bpf_prog_array_delete_safe_at(struct bpf_prog_array *array, int index);
1084 int bpf_prog_array_update_at(struct bpf_prog_array *array, int index,
1085 struct bpf_prog *prog);
1086 int bpf_prog_array_copy_info(struct bpf_prog_array *array,
1087 u32 *prog_ids, u32 request_cnt,
1089 int bpf_prog_array_copy(struct bpf_prog_array *old_array,
1090 struct bpf_prog *exclude_prog,
1091 struct bpf_prog *include_prog,
1092 struct bpf_prog_array **new_array);
1094 #define __BPF_PROG_RUN_ARRAY(array, ctx, func, check_non_null, set_cg_storage) \
1096 struct bpf_prog_array_item *_item; \
1097 struct bpf_prog *_prog; \
1098 struct bpf_prog_array *_array; \
1100 migrate_disable(); \
1102 _array = rcu_dereference(array); \
1103 if (unlikely(check_non_null && !_array))\
1105 _item = &_array->items[0]; \
1106 while ((_prog = READ_ONCE(_item->prog))) { \
1107 if (!set_cg_storage) { \
1108 _ret &= func(_prog, ctx); \
1110 if (unlikely(bpf_cgroup_storage_set(_item->cgroup_storage))) \
1112 _ret &= func(_prog, ctx); \
1113 bpf_cgroup_storage_unset(); \
1118 rcu_read_unlock(); \
1123 /* To be used by __cgroup_bpf_run_filter_skb for EGRESS BPF progs
1124 * so BPF programs can request cwr for TCP packets.
1126 * Current cgroup skb programs can only return 0 or 1 (0 to drop the
1127 * packet. This macro changes the behavior so the low order bit
1128 * indicates whether the packet should be dropped (0) or not (1)
1129 * and the next bit is a congestion notification bit. This could be
1130 * used by TCP to call tcp_enter_cwr()
1132 * Hence, new allowed return values of CGROUP EGRESS BPF programs are:
1135 * 2: drop packet and cn
1136 * 3: keep packet and cn
1138 * This macro then converts it to one of the NET_XMIT or an error
1139 * code that is then interpreted as drop packet (and no cn):
1140 * 0: NET_XMIT_SUCCESS skb should be transmitted
1141 * 1: NET_XMIT_DROP skb should be dropped and cn
1142 * 2: NET_XMIT_CN skb should be transmitted and cn
1143 * 3: -EPERM skb should be dropped
1145 #define BPF_PROG_CGROUP_INET_EGRESS_RUN_ARRAY(array, ctx, func) \
1147 struct bpf_prog_array_item *_item; \
1148 struct bpf_prog *_prog; \
1149 struct bpf_prog_array *_array; \
1153 migrate_disable(); \
1155 _array = rcu_dereference(array); \
1156 _item = &_array->items[0]; \
1157 while ((_prog = READ_ONCE(_item->prog))) { \
1158 if (unlikely(bpf_cgroup_storage_set(_item->cgroup_storage))) \
1160 ret = func(_prog, ctx); \
1161 bpf_cgroup_storage_unset(); \
1162 _ret &= (ret & 1); \
1166 rcu_read_unlock(); \
1169 _ret = (_cn ? NET_XMIT_CN : NET_XMIT_SUCCESS); \
1171 _ret = (_cn ? NET_XMIT_DROP : -EPERM); \
1175 #define BPF_PROG_RUN_ARRAY(array, ctx, func) \
1176 __BPF_PROG_RUN_ARRAY(array, ctx, func, false, true)
1178 #define BPF_PROG_RUN_ARRAY_CHECK(array, ctx, func) \
1179 __BPF_PROG_RUN_ARRAY(array, ctx, func, true, false)
1181 #ifdef CONFIG_BPF_SYSCALL
1182 DECLARE_PER_CPU(int, bpf_prog_active);
1183 extern struct mutex bpf_stats_enabled_mutex;
1186 * Block execution of BPF programs attached to instrumentation (perf,
1187 * kprobes, tracepoints) to prevent deadlocks on map operations as any of
1188 * these events can happen inside a region which holds a map bucket lock
1189 * and can deadlock on it.
1191 * Use the preemption safe inc/dec variants on RT because migrate disable
1192 * is preemptible on RT and preemption in the middle of the RMW operation
1193 * might lead to inconsistent state. Use the raw variants for non RT
1194 * kernels as migrate_disable() maps to preempt_disable() so the slightly
1195 * more expensive save operation can be avoided.
1197 static inline void bpf_disable_instrumentation(void)
1200 if (IS_ENABLED(CONFIG_PREEMPT_RT))
1201 this_cpu_inc(bpf_prog_active);
1203 __this_cpu_inc(bpf_prog_active);
1206 static inline void bpf_enable_instrumentation(void)
1208 if (IS_ENABLED(CONFIG_PREEMPT_RT))
1209 this_cpu_dec(bpf_prog_active);
1211 __this_cpu_dec(bpf_prog_active);
1215 extern const struct file_operations bpf_map_fops;
1216 extern const struct file_operations bpf_prog_fops;
1217 extern const struct file_operations bpf_iter_fops;
1219 #define BPF_PROG_TYPE(_id, _name, prog_ctx_type, kern_ctx_type) \
1220 extern const struct bpf_prog_ops _name ## _prog_ops; \
1221 extern const struct bpf_verifier_ops _name ## _verifier_ops;
1222 #define BPF_MAP_TYPE(_id, _ops) \
1223 extern const struct bpf_map_ops _ops;
1224 #define BPF_LINK_TYPE(_id, _name)
1225 #include <linux/bpf_types.h>
1226 #undef BPF_PROG_TYPE
1228 #undef BPF_LINK_TYPE
1230 extern const struct bpf_prog_ops bpf_offload_prog_ops;
1231 extern const struct bpf_verifier_ops tc_cls_act_analyzer_ops;
1232 extern const struct bpf_verifier_ops xdp_analyzer_ops;
1234 struct bpf_prog *bpf_prog_get(u32 ufd);
1235 struct bpf_prog *bpf_prog_get_type_dev(u32 ufd, enum bpf_prog_type type,
1237 void bpf_prog_add(struct bpf_prog *prog, int i);
1238 void bpf_prog_sub(struct bpf_prog *prog, int i);
1239 void bpf_prog_inc(struct bpf_prog *prog);
1240 struct bpf_prog * __must_check bpf_prog_inc_not_zero(struct bpf_prog *prog);
1241 void bpf_prog_put(struct bpf_prog *prog);
1242 int __bpf_prog_charge(struct user_struct *user, u32 pages);
1243 void __bpf_prog_uncharge(struct user_struct *user, u32 pages);
1245 void bpf_prog_free_id(struct bpf_prog *prog, bool do_idr_lock);
1246 void bpf_map_free_id(struct bpf_map *map, bool do_idr_lock);
1248 struct bpf_map *bpf_map_get(u32 ufd);
1249 struct bpf_map *bpf_map_get_with_uref(u32 ufd);
1250 struct bpf_map *__bpf_map_get(struct fd f);
1251 void bpf_map_inc(struct bpf_map *map);
1252 void bpf_map_inc_with_uref(struct bpf_map *map);
1253 struct bpf_map * __must_check bpf_map_inc_not_zero(struct bpf_map *map);
1254 void bpf_map_put_with_uref(struct bpf_map *map);
1255 void bpf_map_put(struct bpf_map *map);
1256 int bpf_map_charge_memlock(struct bpf_map *map, u32 pages);
1257 void bpf_map_uncharge_memlock(struct bpf_map *map, u32 pages);
1258 int bpf_map_charge_init(struct bpf_map_memory *mem, u64 size);
1259 void bpf_map_charge_finish(struct bpf_map_memory *mem);
1260 void bpf_map_charge_move(struct bpf_map_memory *dst,
1261 struct bpf_map_memory *src);
1262 void *bpf_map_area_alloc(u64 size, int numa_node);
1263 void *bpf_map_area_mmapable_alloc(u64 size, int numa_node);
1264 void bpf_map_area_free(void *base);
1265 bool bpf_map_write_active(const struct bpf_map *map);
1266 void bpf_map_init_from_attr(struct bpf_map *map, union bpf_attr *attr);
1267 int generic_map_lookup_batch(struct bpf_map *map,
1268 const union bpf_attr *attr,
1269 union bpf_attr __user *uattr);
1270 int generic_map_update_batch(struct bpf_map *map,
1271 const union bpf_attr *attr,
1272 union bpf_attr __user *uattr);
1273 int generic_map_delete_batch(struct bpf_map *map,
1274 const union bpf_attr *attr,
1275 union bpf_attr __user *uattr);
1276 struct bpf_map *bpf_map_get_curr_or_next(u32 *id);
1277 struct bpf_prog *bpf_prog_get_curr_or_next(u32 *id);
1279 extern int sysctl_unprivileged_bpf_disabled;
1281 static inline bool bpf_allow_ptr_leaks(void)
1283 return perfmon_capable();
1286 static inline bool bpf_allow_uninit_stack(void)
1288 return perfmon_capable();
1291 static inline bool bpf_allow_ptr_to_map_access(void)
1293 return perfmon_capable();
1296 static inline bool bpf_bypass_spec_v1(void)
1298 return perfmon_capable();
1301 static inline bool bpf_bypass_spec_v4(void)
1303 return perfmon_capable();
1306 int bpf_map_new_fd(struct bpf_map *map, int flags);
1307 int bpf_prog_new_fd(struct bpf_prog *prog);
1309 void bpf_link_init(struct bpf_link *link, enum bpf_link_type type,
1310 const struct bpf_link_ops *ops, struct bpf_prog *prog);
1311 int bpf_link_prime(struct bpf_link *link, struct bpf_link_primer *primer);
1312 int bpf_link_settle(struct bpf_link_primer *primer);
1313 void bpf_link_cleanup(struct bpf_link_primer *primer);
1314 void bpf_link_inc(struct bpf_link *link);
1315 void bpf_link_put(struct bpf_link *link);
1316 int bpf_link_new_fd(struct bpf_link *link);
1317 struct file *bpf_link_new_file(struct bpf_link *link, int *reserved_fd);
1318 struct bpf_link *bpf_link_get_from_fd(u32 ufd);
1320 int bpf_obj_pin_user(u32 ufd, const char __user *pathname);
1321 int bpf_obj_get_user(const char __user *pathname, int flags);
1323 #define BPF_ITER_FUNC_PREFIX "bpf_iter_"
1324 #define DEFINE_BPF_ITER_FUNC(target, args...) \
1325 extern int bpf_iter_ ## target(args); \
1326 int __init bpf_iter_ ## target(args) { return 0; }
1328 struct bpf_iter_aux_info {
1329 struct bpf_map *map;
1332 typedef int (*bpf_iter_attach_target_t)(struct bpf_prog *prog,
1333 union bpf_iter_link_info *linfo,
1334 struct bpf_iter_aux_info *aux);
1335 typedef void (*bpf_iter_detach_target_t)(struct bpf_iter_aux_info *aux);
1336 typedef void (*bpf_iter_show_fdinfo_t) (const struct bpf_iter_aux_info *aux,
1337 struct seq_file *seq);
1338 typedef int (*bpf_iter_fill_link_info_t)(const struct bpf_iter_aux_info *aux,
1339 struct bpf_link_info *info);
1341 #define BPF_ITER_CTX_ARG_MAX 2
1342 struct bpf_iter_reg {
1344 bpf_iter_attach_target_t attach_target;
1345 bpf_iter_detach_target_t detach_target;
1346 bpf_iter_show_fdinfo_t show_fdinfo;
1347 bpf_iter_fill_link_info_t fill_link_info;
1348 u32 ctx_arg_info_size;
1349 struct bpf_ctx_arg_aux ctx_arg_info[BPF_ITER_CTX_ARG_MAX];
1350 const struct bpf_iter_seq_info *seq_info;
1353 struct bpf_iter_meta {
1354 __bpf_md_ptr(struct seq_file *, seq);
1359 struct bpf_iter__bpf_map_elem {
1360 __bpf_md_ptr(struct bpf_iter_meta *, meta);
1361 __bpf_md_ptr(struct bpf_map *, map);
1362 __bpf_md_ptr(void *, key);
1363 __bpf_md_ptr(void *, value);
1366 int bpf_iter_reg_target(const struct bpf_iter_reg *reg_info);
1367 void bpf_iter_unreg_target(const struct bpf_iter_reg *reg_info);
1368 bool bpf_iter_prog_supported(struct bpf_prog *prog);
1369 int bpf_iter_link_attach(const union bpf_attr *attr, struct bpf_prog *prog);
1370 int bpf_iter_new_fd(struct bpf_link *link);
1371 bool bpf_link_is_iter(struct bpf_link *link);
1372 struct bpf_prog *bpf_iter_get_info(struct bpf_iter_meta *meta, bool in_stop);
1373 int bpf_iter_run_prog(struct bpf_prog *prog, void *ctx);
1374 void bpf_iter_map_show_fdinfo(const struct bpf_iter_aux_info *aux,
1375 struct seq_file *seq);
1376 int bpf_iter_map_fill_link_info(const struct bpf_iter_aux_info *aux,
1377 struct bpf_link_info *info);
1379 int bpf_percpu_hash_copy(struct bpf_map *map, void *key, void *value);
1380 int bpf_percpu_array_copy(struct bpf_map *map, void *key, void *value);
1381 int bpf_percpu_hash_update(struct bpf_map *map, void *key, void *value,
1383 int bpf_percpu_array_update(struct bpf_map *map, void *key, void *value,
1386 int bpf_stackmap_copy(struct bpf_map *map, void *key, void *value);
1388 int bpf_fd_array_map_update_elem(struct bpf_map *map, struct file *map_file,
1389 void *key, void *value, u64 map_flags);
1390 int bpf_fd_array_map_lookup_elem(struct bpf_map *map, void *key, u32 *value);
1391 int bpf_fd_htab_map_update_elem(struct bpf_map *map, struct file *map_file,
1392 void *key, void *value, u64 map_flags);
1393 int bpf_fd_htab_map_lookup_elem(struct bpf_map *map, void *key, u32 *value);
1395 int bpf_get_file_flag(int flags);
1396 int bpf_check_uarg_tail_zero(void __user *uaddr, size_t expected_size,
1397 size_t actual_size);
1399 /* memcpy that is used with 8-byte aligned pointers, power-of-8 size and
1400 * forced to use 'long' read/writes to try to atomically copy long counters.
1401 * Best-effort only. No barriers here, since it _will_ race with concurrent
1402 * updates from BPF programs. Called from bpf syscall and mostly used with
1403 * size 8 or 16 bytes, so ask compiler to inline it.
1405 static inline void bpf_long_memcpy(void *dst, const void *src, u32 size)
1407 const long *lsrc = src;
1410 size /= sizeof(long);
1415 /* verify correctness of eBPF program */
1416 int bpf_check(struct bpf_prog **fp, union bpf_attr *attr,
1417 union bpf_attr __user *uattr);
1419 #ifndef CONFIG_BPF_JIT_ALWAYS_ON
1420 void bpf_patch_call_args(struct bpf_insn *insn, u32 stack_depth);
1423 struct btf *bpf_get_btf_vmlinux(void);
1429 struct bpf_dtab_netdev *__dev_map_lookup_elem(struct bpf_map *map, u32 key);
1430 struct bpf_dtab_netdev *__dev_map_hash_lookup_elem(struct bpf_map *map, u32 key);
1431 void __dev_flush(void);
1432 int dev_xdp_enqueue(struct net_device *dev, struct xdp_buff *xdp,
1433 struct net_device *dev_rx);
1434 int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp,
1435 struct net_device *dev_rx);
1436 int dev_map_generic_redirect(struct bpf_dtab_netdev *dst, struct sk_buff *skb,
1437 struct bpf_prog *xdp_prog);
1438 bool dev_map_can_have_prog(struct bpf_map *map);
1440 struct bpf_cpu_map_entry *__cpu_map_lookup_elem(struct bpf_map *map, u32 key);
1441 void __cpu_map_flush(void);
1442 int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu, struct xdp_buff *xdp,
1443 struct net_device *dev_rx);
1444 bool cpu_map_prog_allowed(struct bpf_map *map);
1446 /* Return map's numa specified by userspace */
1447 static inline int bpf_map_attr_numa_node(const union bpf_attr *attr)
1449 return (attr->map_flags & BPF_F_NUMA_NODE) ?
1450 attr->numa_node : NUMA_NO_NODE;
1453 struct bpf_prog *bpf_prog_get_type_path(const char *name, enum bpf_prog_type type);
1454 int array_map_alloc_check(union bpf_attr *attr);
1456 int bpf_prog_test_run_xdp(struct bpf_prog *prog, const union bpf_attr *kattr,
1457 union bpf_attr __user *uattr);
1458 int bpf_prog_test_run_skb(struct bpf_prog *prog, const union bpf_attr *kattr,
1459 union bpf_attr __user *uattr);
1460 int bpf_prog_test_run_tracing(struct bpf_prog *prog,
1461 const union bpf_attr *kattr,
1462 union bpf_attr __user *uattr);
1463 int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog,
1464 const union bpf_attr *kattr,
1465 union bpf_attr __user *uattr);
1466 int bpf_prog_test_run_raw_tp(struct bpf_prog *prog,
1467 const union bpf_attr *kattr,
1468 union bpf_attr __user *uattr);
1469 int bpf_prog_test_run_sk_lookup(struct bpf_prog *prog,
1470 const union bpf_attr *kattr,
1471 union bpf_attr __user *uattr);
1472 bool btf_ctx_access(int off, int size, enum bpf_access_type type,
1473 const struct bpf_prog *prog,
1474 struct bpf_insn_access_aux *info);
1475 int btf_struct_access(struct bpf_verifier_log *log,
1476 const struct btf_type *t, int off, int size,
1477 enum bpf_access_type atype,
1479 bool btf_struct_ids_match(struct bpf_verifier_log *log,
1480 int off, u32 id, u32 need_type_id);
1482 int btf_distill_func_proto(struct bpf_verifier_log *log,
1484 const struct btf_type *func_proto,
1485 const char *func_name,
1486 struct btf_func_model *m);
1488 struct bpf_reg_state;
1489 int btf_check_func_arg_match(struct bpf_verifier_env *env, int subprog,
1490 struct bpf_reg_state *regs);
1491 int btf_prepare_func_args(struct bpf_verifier_env *env, int subprog,
1492 struct bpf_reg_state *reg);
1493 int btf_check_type_match(struct bpf_verifier_log *log, const struct bpf_prog *prog,
1494 struct btf *btf, const struct btf_type *t);
1496 struct bpf_prog *bpf_prog_by_id(u32 id);
1497 struct bpf_link *bpf_link_by_id(u32 id);
1499 const struct bpf_func_proto *bpf_base_func_proto(enum bpf_func_id func_id);
1501 static inline bool unprivileged_ebpf_enabled(void)
1503 return !sysctl_unprivileged_bpf_disabled;
1506 #else /* !CONFIG_BPF_SYSCALL */
1507 static inline struct bpf_prog *bpf_prog_get(u32 ufd)
1509 return ERR_PTR(-EOPNOTSUPP);
1512 static inline struct bpf_prog *bpf_prog_get_type_dev(u32 ufd,
1513 enum bpf_prog_type type,
1516 return ERR_PTR(-EOPNOTSUPP);
1519 static inline void bpf_prog_add(struct bpf_prog *prog, int i)
1523 static inline void bpf_prog_sub(struct bpf_prog *prog, int i)
1527 static inline void bpf_prog_put(struct bpf_prog *prog)
1531 static inline void bpf_prog_inc(struct bpf_prog *prog)
1535 static inline struct bpf_prog *__must_check
1536 bpf_prog_inc_not_zero(struct bpf_prog *prog)
1538 return ERR_PTR(-EOPNOTSUPP);
1541 static inline int __bpf_prog_charge(struct user_struct *user, u32 pages)
1546 static inline void __bpf_prog_uncharge(struct user_struct *user, u32 pages)
1550 static inline void bpf_link_init(struct bpf_link *link, enum bpf_link_type type,
1551 const struct bpf_link_ops *ops,
1552 struct bpf_prog *prog)
1556 static inline int bpf_link_prime(struct bpf_link *link,
1557 struct bpf_link_primer *primer)
1562 static inline int bpf_link_settle(struct bpf_link_primer *primer)
1567 static inline void bpf_link_cleanup(struct bpf_link_primer *primer)
1571 static inline void bpf_link_inc(struct bpf_link *link)
1575 static inline void bpf_link_put(struct bpf_link *link)
1579 static inline int bpf_obj_get_user(const char __user *pathname, int flags)
1584 static inline struct net_device *__dev_map_lookup_elem(struct bpf_map *map,
1590 static inline struct net_device *__dev_map_hash_lookup_elem(struct bpf_map *map,
1595 static inline bool dev_map_can_have_prog(struct bpf_map *map)
1600 static inline void __dev_flush(void)
1605 struct bpf_dtab_netdev;
1608 int dev_xdp_enqueue(struct net_device *dev, struct xdp_buff *xdp,
1609 struct net_device *dev_rx)
1615 int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp,
1616 struct net_device *dev_rx)
1623 static inline int dev_map_generic_redirect(struct bpf_dtab_netdev *dst,
1624 struct sk_buff *skb,
1625 struct bpf_prog *xdp_prog)
1631 struct bpf_cpu_map_entry *__cpu_map_lookup_elem(struct bpf_map *map, u32 key)
1636 static inline void __cpu_map_flush(void)
1640 static inline int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu,
1641 struct xdp_buff *xdp,
1642 struct net_device *dev_rx)
1647 static inline bool cpu_map_prog_allowed(struct bpf_map *map)
1652 static inline struct bpf_prog *bpf_prog_get_type_path(const char *name,
1653 enum bpf_prog_type type)
1655 return ERR_PTR(-EOPNOTSUPP);
1658 static inline int bpf_prog_test_run_xdp(struct bpf_prog *prog,
1659 const union bpf_attr *kattr,
1660 union bpf_attr __user *uattr)
1665 static inline int bpf_prog_test_run_skb(struct bpf_prog *prog,
1666 const union bpf_attr *kattr,
1667 union bpf_attr __user *uattr)
1672 static inline int bpf_prog_test_run_tracing(struct bpf_prog *prog,
1673 const union bpf_attr *kattr,
1674 union bpf_attr __user *uattr)
1679 static inline int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog,
1680 const union bpf_attr *kattr,
1681 union bpf_attr __user *uattr)
1686 static inline int bpf_prog_test_run_sk_lookup(struct bpf_prog *prog,
1687 const union bpf_attr *kattr,
1688 union bpf_attr __user *uattr)
1693 static inline void bpf_map_put(struct bpf_map *map)
1697 static inline struct bpf_prog *bpf_prog_by_id(u32 id)
1699 return ERR_PTR(-ENOTSUPP);
1702 static inline const struct bpf_func_proto *
1703 bpf_base_func_proto(enum bpf_func_id func_id)
1708 static inline bool unprivileged_ebpf_enabled(void)
1713 #endif /* CONFIG_BPF_SYSCALL */
1715 static inline struct bpf_prog *bpf_prog_get_type(u32 ufd,
1716 enum bpf_prog_type type)
1718 return bpf_prog_get_type_dev(ufd, type, false);
1721 void __bpf_free_used_maps(struct bpf_prog_aux *aux,
1722 struct bpf_map **used_maps, u32 len);
1724 bool bpf_prog_get_ok(struct bpf_prog *, enum bpf_prog_type *, bool);
1726 int bpf_prog_offload_compile(struct bpf_prog *prog);
1727 void bpf_prog_offload_destroy(struct bpf_prog *prog);
1728 int bpf_prog_offload_info_fill(struct bpf_prog_info *info,
1729 struct bpf_prog *prog);
1731 int bpf_map_offload_info_fill(struct bpf_map_info *info, struct bpf_map *map);
1733 int bpf_map_offload_lookup_elem(struct bpf_map *map, void *key, void *value);
1734 int bpf_map_offload_update_elem(struct bpf_map *map,
1735 void *key, void *value, u64 flags);
1736 int bpf_map_offload_delete_elem(struct bpf_map *map, void *key);
1737 int bpf_map_offload_get_next_key(struct bpf_map *map,
1738 void *key, void *next_key);
1740 bool bpf_offload_prog_map_match(struct bpf_prog *prog, struct bpf_map *map);
1742 struct bpf_offload_dev *
1743 bpf_offload_dev_create(const struct bpf_prog_offload_ops *ops, void *priv);
1744 void bpf_offload_dev_destroy(struct bpf_offload_dev *offdev);
1745 void *bpf_offload_dev_priv(struct bpf_offload_dev *offdev);
1746 int bpf_offload_dev_netdev_register(struct bpf_offload_dev *offdev,
1747 struct net_device *netdev);
1748 void bpf_offload_dev_netdev_unregister(struct bpf_offload_dev *offdev,
1749 struct net_device *netdev);
1750 bool bpf_offload_dev_match(struct bpf_prog *prog, struct net_device *netdev);
1752 void unpriv_ebpf_notify(int new_state);
1754 #if defined(CONFIG_NET) && defined(CONFIG_BPF_SYSCALL)
1755 int bpf_prog_offload_init(struct bpf_prog *prog, union bpf_attr *attr);
1757 static inline bool bpf_prog_is_dev_bound(const struct bpf_prog_aux *aux)
1759 return aux->offload_requested;
1762 static inline bool bpf_map_is_dev_bound(struct bpf_map *map)
1764 return unlikely(map->ops == &bpf_map_offload_ops);
1767 struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr);
1768 void bpf_map_offload_map_free(struct bpf_map *map);
1770 static inline int bpf_prog_offload_init(struct bpf_prog *prog,
1771 union bpf_attr *attr)
1776 static inline bool bpf_prog_is_dev_bound(struct bpf_prog_aux *aux)
1781 static inline bool bpf_map_is_dev_bound(struct bpf_map *map)
1786 static inline struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr)
1788 return ERR_PTR(-EOPNOTSUPP);
1791 static inline void bpf_map_offload_map_free(struct bpf_map *map)
1794 #endif /* CONFIG_NET && CONFIG_BPF_SYSCALL */
1796 #if defined(CONFIG_BPF_STREAM_PARSER)
1797 int sock_map_prog_update(struct bpf_map *map, struct bpf_prog *prog,
1798 struct bpf_prog *old, u32 which);
1799 int sock_map_get_from_fd(const union bpf_attr *attr, struct bpf_prog *prog);
1800 int sock_map_prog_detach(const union bpf_attr *attr, enum bpf_prog_type ptype);
1801 int sock_map_update_elem_sys(struct bpf_map *map, void *key, void *value, u64 flags);
1802 void sock_map_unhash(struct sock *sk);
1803 void sock_map_close(struct sock *sk, long timeout);
1805 static inline int sock_map_prog_update(struct bpf_map *map,
1806 struct bpf_prog *prog,
1807 struct bpf_prog *old, u32 which)
1812 static inline int sock_map_get_from_fd(const union bpf_attr *attr,
1813 struct bpf_prog *prog)
1818 static inline int sock_map_prog_detach(const union bpf_attr *attr,
1819 enum bpf_prog_type ptype)
1824 static inline int sock_map_update_elem_sys(struct bpf_map *map, void *key, void *value,
1829 #endif /* CONFIG_BPF_STREAM_PARSER */
1831 #if defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL)
1832 void bpf_sk_reuseport_detach(struct sock *sk);
1833 int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map, void *key,
1835 int bpf_fd_reuseport_array_update_elem(struct bpf_map *map, void *key,
1836 void *value, u64 map_flags);
1838 static inline void bpf_sk_reuseport_detach(struct sock *sk)
1842 #ifdef CONFIG_BPF_SYSCALL
1843 static inline int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map,
1844 void *key, void *value)
1849 static inline int bpf_fd_reuseport_array_update_elem(struct bpf_map *map,
1850 void *key, void *value,
1855 #endif /* CONFIG_BPF_SYSCALL */
1856 #endif /* defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL) */
1858 /* verifier prototypes for helper functions called from eBPF programs */
1859 extern const struct bpf_func_proto bpf_map_lookup_elem_proto;
1860 extern const struct bpf_func_proto bpf_map_update_elem_proto;
1861 extern const struct bpf_func_proto bpf_map_delete_elem_proto;
1862 extern const struct bpf_func_proto bpf_map_push_elem_proto;
1863 extern const struct bpf_func_proto bpf_map_pop_elem_proto;
1864 extern const struct bpf_func_proto bpf_map_peek_elem_proto;
1866 extern const struct bpf_func_proto bpf_get_prandom_u32_proto;
1867 extern const struct bpf_func_proto bpf_get_smp_processor_id_proto;
1868 extern const struct bpf_func_proto bpf_get_numa_node_id_proto;
1869 extern const struct bpf_func_proto bpf_tail_call_proto;
1870 extern const struct bpf_func_proto bpf_ktime_get_ns_proto;
1871 extern const struct bpf_func_proto bpf_ktime_get_boot_ns_proto;
1872 extern const struct bpf_func_proto bpf_get_current_pid_tgid_proto;
1873 extern const struct bpf_func_proto bpf_get_current_uid_gid_proto;
1874 extern const struct bpf_func_proto bpf_get_current_comm_proto;
1875 extern const struct bpf_func_proto bpf_get_stackid_proto;
1876 extern const struct bpf_func_proto bpf_get_stack_proto;
1877 extern const struct bpf_func_proto bpf_get_task_stack_proto;
1878 extern const struct bpf_func_proto bpf_get_stackid_proto_pe;
1879 extern const struct bpf_func_proto bpf_get_stack_proto_pe;
1880 extern const struct bpf_func_proto bpf_sock_map_update_proto;
1881 extern const struct bpf_func_proto bpf_sock_hash_update_proto;
1882 extern const struct bpf_func_proto bpf_get_current_cgroup_id_proto;
1883 extern const struct bpf_func_proto bpf_get_current_ancestor_cgroup_id_proto;
1884 extern const struct bpf_func_proto bpf_msg_redirect_hash_proto;
1885 extern const struct bpf_func_proto bpf_msg_redirect_map_proto;
1886 extern const struct bpf_func_proto bpf_sk_redirect_hash_proto;
1887 extern const struct bpf_func_proto bpf_sk_redirect_map_proto;
1888 extern const struct bpf_func_proto bpf_spin_lock_proto;
1889 extern const struct bpf_func_proto bpf_spin_unlock_proto;
1890 extern const struct bpf_func_proto bpf_get_local_storage_proto;
1891 extern const struct bpf_func_proto bpf_strtol_proto;
1892 extern const struct bpf_func_proto bpf_strtoul_proto;
1893 extern const struct bpf_func_proto bpf_tcp_sock_proto;
1894 extern const struct bpf_func_proto bpf_jiffies64_proto;
1895 extern const struct bpf_func_proto bpf_get_ns_current_pid_tgid_proto;
1896 extern const struct bpf_func_proto bpf_event_output_data_proto;
1897 extern const struct bpf_func_proto bpf_ringbuf_output_proto;
1898 extern const struct bpf_func_proto bpf_ringbuf_reserve_proto;
1899 extern const struct bpf_func_proto bpf_ringbuf_submit_proto;
1900 extern const struct bpf_func_proto bpf_ringbuf_discard_proto;
1901 extern const struct bpf_func_proto bpf_ringbuf_query_proto;
1902 extern const struct bpf_func_proto bpf_skc_to_tcp6_sock_proto;
1903 extern const struct bpf_func_proto bpf_skc_to_tcp_sock_proto;
1904 extern const struct bpf_func_proto bpf_skc_to_tcp_timewait_sock_proto;
1905 extern const struct bpf_func_proto bpf_skc_to_tcp_request_sock_proto;
1906 extern const struct bpf_func_proto bpf_skc_to_udp6_sock_proto;
1907 extern const struct bpf_func_proto bpf_copy_from_user_proto;
1908 extern const struct bpf_func_proto bpf_snprintf_btf_proto;
1909 extern const struct bpf_func_proto bpf_per_cpu_ptr_proto;
1910 extern const struct bpf_func_proto bpf_this_cpu_ptr_proto;
1912 const struct bpf_func_proto *bpf_tracing_func_proto(
1913 enum bpf_func_id func_id, const struct bpf_prog *prog);
1915 const struct bpf_func_proto *tracing_prog_func_proto(
1916 enum bpf_func_id func_id, const struct bpf_prog *prog);
1918 /* Shared helpers among cBPF and eBPF. */
1919 void bpf_user_rnd_init_once(void);
1920 u64 bpf_user_rnd_u32(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
1921 u64 bpf_get_raw_cpu_id(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
1923 #if defined(CONFIG_NET)
1924 bool bpf_sock_common_is_valid_access(int off, int size,
1925 enum bpf_access_type type,
1926 struct bpf_insn_access_aux *info);
1927 bool bpf_sock_is_valid_access(int off, int size, enum bpf_access_type type,
1928 struct bpf_insn_access_aux *info);
1929 u32 bpf_sock_convert_ctx_access(enum bpf_access_type type,
1930 const struct bpf_insn *si,
1931 struct bpf_insn *insn_buf,
1932 struct bpf_prog *prog,
1935 static inline bool bpf_sock_common_is_valid_access(int off, int size,
1936 enum bpf_access_type type,
1937 struct bpf_insn_access_aux *info)
1941 static inline bool bpf_sock_is_valid_access(int off, int size,
1942 enum bpf_access_type type,
1943 struct bpf_insn_access_aux *info)
1947 static inline u32 bpf_sock_convert_ctx_access(enum bpf_access_type type,
1948 const struct bpf_insn *si,
1949 struct bpf_insn *insn_buf,
1950 struct bpf_prog *prog,
1958 struct sk_reuseport_kern {
1959 struct sk_buff *skb;
1961 struct sock *selected_sk;
1967 bool bpf_tcp_sock_is_valid_access(int off, int size, enum bpf_access_type type,
1968 struct bpf_insn_access_aux *info);
1970 u32 bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type,
1971 const struct bpf_insn *si,
1972 struct bpf_insn *insn_buf,
1973 struct bpf_prog *prog,
1976 bool bpf_xdp_sock_is_valid_access(int off, int size, enum bpf_access_type type,
1977 struct bpf_insn_access_aux *info);
1979 u32 bpf_xdp_sock_convert_ctx_access(enum bpf_access_type type,
1980 const struct bpf_insn *si,
1981 struct bpf_insn *insn_buf,
1982 struct bpf_prog *prog,
1985 static inline bool bpf_tcp_sock_is_valid_access(int off, int size,
1986 enum bpf_access_type type,
1987 struct bpf_insn_access_aux *info)
1992 static inline u32 bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type,
1993 const struct bpf_insn *si,
1994 struct bpf_insn *insn_buf,
1995 struct bpf_prog *prog,
2000 static inline bool bpf_xdp_sock_is_valid_access(int off, int size,
2001 enum bpf_access_type type,
2002 struct bpf_insn_access_aux *info)
2007 static inline u32 bpf_xdp_sock_convert_ctx_access(enum bpf_access_type type,
2008 const struct bpf_insn *si,
2009 struct bpf_insn *insn_buf,
2010 struct bpf_prog *prog,
2015 #endif /* CONFIG_INET */
2017 enum bpf_text_poke_type {
2022 int bpf_arch_text_poke(void *ip, enum bpf_text_poke_type t,
2023 void *addr1, void *addr2);
2026 bool btf_id_set_contains(const struct btf_id_set *set, u32 id);
2028 #endif /* _LINUX_BPF_H */