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/refcount.h>
18 #include <linux/mutex.h>
19 #include <linux/module.h>
20 #include <linux/kallsyms.h>
21 #include <linux/capability.h>
22 #include <linux/sched/mm.h>
23 #include <linux/slab.h>
24 #include <linux/percpu-refcount.h>
26 struct bpf_verifier_env;
27 struct bpf_verifier_log;
36 struct exception_table_entry;
37 struct seq_operations;
38 struct bpf_iter_aux_info;
39 struct bpf_local_storage;
40 struct bpf_local_storage_map;
44 extern struct idr btf_idr;
45 extern spinlock_t btf_idr_lock;
46 extern struct kobject *btf_kobj;
48 typedef int (*bpf_iter_init_seq_priv_t)(void *private_data,
49 struct bpf_iter_aux_info *aux);
50 typedef void (*bpf_iter_fini_seq_priv_t)(void *private_data);
51 struct bpf_iter_seq_info {
52 const struct seq_operations *seq_ops;
53 bpf_iter_init_seq_priv_t init_seq_private;
54 bpf_iter_fini_seq_priv_t fini_seq_private;
58 /* map is generic key/value storage optionally accesible by eBPF programs */
60 /* funcs callable from userspace (via syscall) */
61 int (*map_alloc_check)(union bpf_attr *attr);
62 struct bpf_map *(*map_alloc)(union bpf_attr *attr);
63 void (*map_release)(struct bpf_map *map, struct file *map_file);
64 void (*map_free)(struct bpf_map *map);
65 int (*map_get_next_key)(struct bpf_map *map, void *key, void *next_key);
66 void (*map_release_uref)(struct bpf_map *map);
67 void *(*map_lookup_elem_sys_only)(struct bpf_map *map, void *key);
68 int (*map_lookup_batch)(struct bpf_map *map, const union bpf_attr *attr,
69 union bpf_attr __user *uattr);
70 int (*map_lookup_and_delete_batch)(struct bpf_map *map,
71 const union bpf_attr *attr,
72 union bpf_attr __user *uattr);
73 int (*map_update_batch)(struct bpf_map *map, const union bpf_attr *attr,
74 union bpf_attr __user *uattr);
75 int (*map_delete_batch)(struct bpf_map *map, const union bpf_attr *attr,
76 union bpf_attr __user *uattr);
78 /* funcs callable from userspace and from eBPF programs */
79 void *(*map_lookup_elem)(struct bpf_map *map, void *key);
80 int (*map_update_elem)(struct bpf_map *map, void *key, void *value, u64 flags);
81 int (*map_delete_elem)(struct bpf_map *map, void *key);
82 int (*map_push_elem)(struct bpf_map *map, void *value, u64 flags);
83 int (*map_pop_elem)(struct bpf_map *map, void *value);
84 int (*map_peek_elem)(struct bpf_map *map, void *value);
86 /* funcs called by prog_array and perf_event_array map */
87 void *(*map_fd_get_ptr)(struct bpf_map *map, struct file *map_file,
89 void (*map_fd_put_ptr)(void *ptr);
90 int (*map_gen_lookup)(struct bpf_map *map, struct bpf_insn *insn_buf);
91 u32 (*map_fd_sys_lookup_elem)(void *ptr);
92 void (*map_seq_show_elem)(struct bpf_map *map, void *key,
94 int (*map_check_btf)(const struct bpf_map *map,
95 const struct btf *btf,
96 const struct btf_type *key_type,
97 const struct btf_type *value_type);
99 /* Prog poke tracking helpers. */
100 int (*map_poke_track)(struct bpf_map *map, struct bpf_prog_aux *aux);
101 void (*map_poke_untrack)(struct bpf_map *map, struct bpf_prog_aux *aux);
102 void (*map_poke_run)(struct bpf_map *map, u32 key, struct bpf_prog *old,
103 struct bpf_prog *new);
105 /* Direct value access helpers. */
106 int (*map_direct_value_addr)(const struct bpf_map *map,
108 int (*map_direct_value_meta)(const struct bpf_map *map,
110 int (*map_mmap)(struct bpf_map *map, struct vm_area_struct *vma);
111 __poll_t (*map_poll)(struct bpf_map *map, struct file *filp,
112 struct poll_table_struct *pts);
114 /* Functions called by bpf_local_storage maps */
115 int (*map_local_storage_charge)(struct bpf_local_storage_map *smap,
116 void *owner, u32 size);
117 void (*map_local_storage_uncharge)(struct bpf_local_storage_map *smap,
118 void *owner, u32 size);
119 struct bpf_local_storage __rcu ** (*map_owner_storage_ptr)(void *owner);
121 /* map_meta_equal must be implemented for maps that can be
122 * used as an inner map. It is a runtime check to ensure
123 * an inner map can be inserted to an outer map.
125 * Some properties of the inner map has been used during the
126 * verification time. When inserting an inner map at the runtime,
127 * map_meta_equal has to ensure the inserting map has the same
128 * properties that the verifier has used earlier.
130 bool (*map_meta_equal)(const struct bpf_map *meta0,
131 const struct bpf_map *meta1);
133 /* BTF name and id of struct allocated by map_alloc */
134 const char * const map_btf_name;
137 /* bpf_iter info used to open a seq_file */
138 const struct bpf_iter_seq_info *iter_seq_info;
142 /* The first two cachelines with read-mostly members of which some
143 * are also accessed in fast-path (e.g. ops, max_entries).
145 const struct bpf_map_ops *ops ____cacheline_aligned;
146 struct bpf_map *inner_map_meta;
147 #ifdef CONFIG_SECURITY
150 enum bpf_map_type map_type;
155 int spin_lock_off; /* >=0 valid offset, <0 error */
159 u32 btf_value_type_id;
161 #ifdef CONFIG_MEMCG_KMEM
162 struct mem_cgroup *memcg;
164 char name[BPF_OBJ_NAME_LEN];
165 u32 btf_vmlinux_value_type_id;
167 bool frozen; /* write-once; write-protected by freeze_mutex */
170 /* The 3rd and 4th cacheline with misc members to avoid false sharing
171 * particularly with refcounting.
173 atomic64_t refcnt ____cacheline_aligned;
175 struct work_struct work;
176 struct mutex freeze_mutex;
177 u64 writecnt; /* writable mmap cnt; protected by freeze_mutex */
180 static inline bool map_value_has_spin_lock(const struct bpf_map *map)
182 return map->spin_lock_off >= 0;
185 static inline void check_and_init_map_lock(struct bpf_map *map, void *dst)
187 if (likely(!map_value_has_spin_lock(map)))
189 *(struct bpf_spin_lock *)(dst + map->spin_lock_off) =
190 (struct bpf_spin_lock){};
193 /* copy everything but bpf_spin_lock */
194 static inline void copy_map_value(struct bpf_map *map, void *dst, void *src)
196 if (unlikely(map_value_has_spin_lock(map))) {
197 u32 off = map->spin_lock_off;
199 memcpy(dst, src, off);
200 memcpy(dst + off + sizeof(struct bpf_spin_lock),
201 src + off + sizeof(struct bpf_spin_lock),
202 map->value_size - off - sizeof(struct bpf_spin_lock));
204 memcpy(dst, src, map->value_size);
207 void copy_map_value_locked(struct bpf_map *map, void *dst, void *src,
209 int bpf_obj_name_cpy(char *dst, const char *src, unsigned int size);
211 struct bpf_offload_dev;
212 struct bpf_offloaded_map;
214 struct bpf_map_dev_ops {
215 int (*map_get_next_key)(struct bpf_offloaded_map *map,
216 void *key, void *next_key);
217 int (*map_lookup_elem)(struct bpf_offloaded_map *map,
218 void *key, void *value);
219 int (*map_update_elem)(struct bpf_offloaded_map *map,
220 void *key, void *value, u64 flags);
221 int (*map_delete_elem)(struct bpf_offloaded_map *map, void *key);
224 struct bpf_offloaded_map {
226 struct net_device *netdev;
227 const struct bpf_map_dev_ops *dev_ops;
229 struct list_head offloads;
232 static inline struct bpf_offloaded_map *map_to_offmap(struct bpf_map *map)
234 return container_of(map, struct bpf_offloaded_map, map);
237 static inline bool bpf_map_offload_neutral(const struct bpf_map *map)
239 return map->map_type == BPF_MAP_TYPE_PERF_EVENT_ARRAY;
242 static inline bool bpf_map_support_seq_show(const struct bpf_map *map)
244 return (map->btf_value_type_id || map->btf_vmlinux_value_type_id) &&
245 map->ops->map_seq_show_elem;
248 int map_check_no_btf(const struct bpf_map *map,
249 const struct btf *btf,
250 const struct btf_type *key_type,
251 const struct btf_type *value_type);
253 bool bpf_map_meta_equal(const struct bpf_map *meta0,
254 const struct bpf_map *meta1);
256 extern const struct bpf_map_ops bpf_map_offload_ops;
258 /* function argument constraints */
260 ARG_DONTCARE = 0, /* unused argument in helper function */
262 /* the following constraints used to prototype
263 * bpf_map_lookup/update/delete_elem() functions
265 ARG_CONST_MAP_PTR, /* const argument used as pointer to bpf_map */
266 ARG_PTR_TO_MAP_KEY, /* pointer to stack used as map key */
267 ARG_PTR_TO_MAP_VALUE, /* pointer to stack used as map value */
268 ARG_PTR_TO_UNINIT_MAP_VALUE, /* pointer to valid memory used to store a map value */
269 ARG_PTR_TO_MAP_VALUE_OR_NULL, /* pointer to stack used as map value or NULL */
271 /* the following constraints used to prototype bpf_memcmp() and other
272 * functions that access data on eBPF program stack
274 ARG_PTR_TO_MEM, /* pointer to valid memory (stack, packet, map value) */
275 ARG_PTR_TO_MEM_OR_NULL, /* pointer to valid memory or NULL */
276 ARG_PTR_TO_UNINIT_MEM, /* pointer to memory does not need to be initialized,
277 * helper function must fill all bytes or clear
278 * them in error case.
281 ARG_CONST_SIZE, /* number of bytes accessed from memory */
282 ARG_CONST_SIZE_OR_ZERO, /* number of bytes accessed from memory or 0 */
284 ARG_PTR_TO_CTX, /* pointer to context */
285 ARG_PTR_TO_CTX_OR_NULL, /* pointer to context or NULL */
286 ARG_ANYTHING, /* any (initialized) argument is ok */
287 ARG_PTR_TO_SPIN_LOCK, /* pointer to bpf_spin_lock */
288 ARG_PTR_TO_SOCK_COMMON, /* pointer to sock_common */
289 ARG_PTR_TO_INT, /* pointer to int */
290 ARG_PTR_TO_LONG, /* pointer to long */
291 ARG_PTR_TO_SOCKET, /* pointer to bpf_sock (fullsock) */
292 ARG_PTR_TO_SOCKET_OR_NULL, /* pointer to bpf_sock (fullsock) or NULL */
293 ARG_PTR_TO_BTF_ID, /* pointer to in-kernel struct */
294 ARG_PTR_TO_ALLOC_MEM, /* pointer to dynamically allocated memory */
295 ARG_PTR_TO_ALLOC_MEM_OR_NULL, /* pointer to dynamically allocated memory or NULL */
296 ARG_CONST_ALLOC_SIZE_OR_ZERO, /* number of allocated bytes requested */
297 ARG_PTR_TO_BTF_ID_SOCK_COMMON, /* pointer to in-kernel sock_common or bpf-mirrored bpf_sock */
298 ARG_PTR_TO_PERCPU_BTF_ID, /* pointer to in-kernel percpu type */
302 /* type of values returned from helper functions */
303 enum bpf_return_type {
304 RET_INTEGER, /* function returns integer */
305 RET_VOID, /* function doesn't return anything */
306 RET_PTR_TO_MAP_VALUE, /* returns a pointer to map elem value */
307 RET_PTR_TO_MAP_VALUE_OR_NULL, /* returns a pointer to map elem value or NULL */
308 RET_PTR_TO_SOCKET_OR_NULL, /* returns a pointer to a socket or NULL */
309 RET_PTR_TO_TCP_SOCK_OR_NULL, /* returns a pointer to a tcp_sock or NULL */
310 RET_PTR_TO_SOCK_COMMON_OR_NULL, /* returns a pointer to a sock_common or NULL */
311 RET_PTR_TO_ALLOC_MEM_OR_NULL, /* returns a pointer to dynamically allocated memory or NULL */
312 RET_PTR_TO_BTF_ID_OR_NULL, /* returns a pointer to a btf_id or NULL */
313 RET_PTR_TO_MEM_OR_BTF_ID_OR_NULL, /* returns a pointer to a valid memory or a btf_id or NULL */
314 RET_PTR_TO_MEM_OR_BTF_ID, /* returns a pointer to a valid memory or a btf_id */
315 RET_PTR_TO_BTF_ID, /* returns a pointer to a btf_id */
318 /* eBPF function prototype used by verifier to allow BPF_CALLs from eBPF programs
319 * to in-kernel helper functions and for adjusting imm32 field in BPF_CALL
320 * instructions after verifying
322 struct bpf_func_proto {
323 u64 (*func)(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
326 enum bpf_return_type ret_type;
329 enum bpf_arg_type arg1_type;
330 enum bpf_arg_type arg2_type;
331 enum bpf_arg_type arg3_type;
332 enum bpf_arg_type arg4_type;
333 enum bpf_arg_type arg5_type;
335 enum bpf_arg_type arg_type[5];
347 int *ret_btf_id; /* return value btf_id */
348 bool (*allowed)(const struct bpf_prog *prog);
351 /* bpf_context is intentionally undefined structure. Pointer to bpf_context is
352 * the first argument to eBPF programs.
353 * For socket filters: 'struct bpf_context *' == 'struct sk_buff *'
357 enum bpf_access_type {
362 /* types of values stored in eBPF registers */
363 /* Pointer types represent:
366 * pointer + (u16) var
367 * pointer + (u16) var + imm
368 * if (range > 0) then [ptr, ptr + range - off) is safe to access
369 * if (id > 0) means that some 'var' was added
370 * if (off > 0) means that 'imm' was added
373 NOT_INIT = 0, /* nothing was written into register */
374 SCALAR_VALUE, /* reg doesn't contain a valid pointer */
375 PTR_TO_CTX, /* reg points to bpf_context */
376 CONST_PTR_TO_MAP, /* reg points to struct bpf_map */
377 PTR_TO_MAP_VALUE, /* reg points to map element value */
378 PTR_TO_MAP_VALUE_OR_NULL,/* points to map elem value or NULL */
379 PTR_TO_STACK, /* reg == frame_pointer + offset */
380 PTR_TO_PACKET_META, /* skb->data - meta_len */
381 PTR_TO_PACKET, /* reg points to skb->data */
382 PTR_TO_PACKET_END, /* skb->data + headlen */
383 PTR_TO_FLOW_KEYS, /* reg points to bpf_flow_keys */
384 PTR_TO_SOCKET, /* reg points to struct bpf_sock */
385 PTR_TO_SOCKET_OR_NULL, /* reg points to struct bpf_sock or NULL */
386 PTR_TO_SOCK_COMMON, /* reg points to sock_common */
387 PTR_TO_SOCK_COMMON_OR_NULL, /* reg points to sock_common or NULL */
388 PTR_TO_TCP_SOCK, /* reg points to struct tcp_sock */
389 PTR_TO_TCP_SOCK_OR_NULL, /* reg points to struct tcp_sock or NULL */
390 PTR_TO_TP_BUFFER, /* reg points to a writable raw tp's buffer */
391 PTR_TO_XDP_SOCK, /* reg points to struct xdp_sock */
392 /* PTR_TO_BTF_ID points to a kernel struct that does not need
393 * to be null checked by the BPF program. This does not imply the
394 * pointer is _not_ null and in practice this can easily be a null
395 * pointer when reading pointer chains. The assumption is program
396 * context will handle null pointer dereference typically via fault
397 * handling. The verifier must keep this in mind and can make no
398 * assumptions about null or non-null when doing branch analysis.
399 * Further, when passed into helpers the helpers can not, without
400 * additional context, assume the value is non-null.
403 /* PTR_TO_BTF_ID_OR_NULL points to a kernel struct that has not
404 * been checked for null. Used primarily to inform the verifier
405 * an explicit null check is required for this struct.
407 PTR_TO_BTF_ID_OR_NULL,
408 PTR_TO_MEM, /* reg points to valid memory region */
409 PTR_TO_MEM_OR_NULL, /* reg points to valid memory region or NULL */
410 PTR_TO_RDONLY_BUF, /* reg points to a readonly buffer */
411 PTR_TO_RDONLY_BUF_OR_NULL, /* reg points to a readonly buffer or NULL */
412 PTR_TO_RDWR_BUF, /* reg points to a read/write buffer */
413 PTR_TO_RDWR_BUF_OR_NULL, /* reg points to a read/write buffer or NULL */
414 PTR_TO_PERCPU_BTF_ID, /* reg points to a percpu kernel variable */
417 /* The information passed from prog-specific *_is_valid_access
418 * back to the verifier.
420 struct bpf_insn_access_aux {
421 enum bpf_reg_type reg_type;
429 struct bpf_verifier_log *log; /* for verbose logs */
433 bpf_ctx_record_field_size(struct bpf_insn_access_aux *aux, u32 size)
435 aux->ctx_field_size = size;
438 struct bpf_prog_ops {
439 int (*test_run)(struct bpf_prog *prog, const union bpf_attr *kattr,
440 union bpf_attr __user *uattr);
443 struct bpf_verifier_ops {
444 /* return eBPF function prototype for verification */
445 const struct bpf_func_proto *
446 (*get_func_proto)(enum bpf_func_id func_id,
447 const struct bpf_prog *prog);
449 /* return true if 'size' wide access at offset 'off' within bpf_context
450 * with 'type' (read or write) is allowed
452 bool (*is_valid_access)(int off, int size, enum bpf_access_type type,
453 const struct bpf_prog *prog,
454 struct bpf_insn_access_aux *info);
455 int (*gen_prologue)(struct bpf_insn *insn, bool direct_write,
456 const struct bpf_prog *prog);
457 int (*gen_ld_abs)(const struct bpf_insn *orig,
458 struct bpf_insn *insn_buf);
459 u32 (*convert_ctx_access)(enum bpf_access_type type,
460 const struct bpf_insn *src,
461 struct bpf_insn *dst,
462 struct bpf_prog *prog, u32 *target_size);
463 int (*btf_struct_access)(struct bpf_verifier_log *log,
464 const struct btf *btf,
465 const struct btf_type *t, int off, int size,
466 enum bpf_access_type atype,
470 struct bpf_prog_offload_ops {
471 /* verifier basic callbacks */
472 int (*insn_hook)(struct bpf_verifier_env *env,
473 int insn_idx, int prev_insn_idx);
474 int (*finalize)(struct bpf_verifier_env *env);
475 /* verifier optimization callbacks (called after .finalize) */
476 int (*replace_insn)(struct bpf_verifier_env *env, u32 off,
477 struct bpf_insn *insn);
478 int (*remove_insns)(struct bpf_verifier_env *env, u32 off, u32 cnt);
479 /* program management callbacks */
480 int (*prepare)(struct bpf_prog *prog);
481 int (*translate)(struct bpf_prog *prog);
482 void (*destroy)(struct bpf_prog *prog);
485 struct bpf_prog_offload {
486 struct bpf_prog *prog;
487 struct net_device *netdev;
488 struct bpf_offload_dev *offdev;
490 struct list_head offloads;
497 enum bpf_cgroup_storage_type {
498 BPF_CGROUP_STORAGE_SHARED,
499 BPF_CGROUP_STORAGE_PERCPU,
500 __BPF_CGROUP_STORAGE_MAX
503 #define MAX_BPF_CGROUP_STORAGE_TYPE __BPF_CGROUP_STORAGE_MAX
505 /* The longest tracepoint has 12 args.
506 * See include/trace/bpf_probe.h
508 #define MAX_BPF_FUNC_ARGS 12
510 struct 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)
530 /* Each call __bpf_prog_enter + call bpf_func + call __bpf_prog_exit is ~50
531 * bytes on x86. Pick a number to fit into BPF_IMAGE_SIZE / 2
533 #define BPF_MAX_TRAMP_PROGS 38
535 struct bpf_tramp_progs {
536 struct bpf_prog *progs[BPF_MAX_TRAMP_PROGS];
540 /* Different use cases for BPF trampoline:
541 * 1. replace nop at the function entry (kprobe equivalent)
542 * flags = BPF_TRAMP_F_RESTORE_REGS
543 * fentry = a set of programs to run before returning from trampoline
545 * 2. replace nop at the function entry (kprobe + kretprobe equivalent)
546 * flags = BPF_TRAMP_F_CALL_ORIG | BPF_TRAMP_F_SKIP_FRAME
547 * orig_call = fentry_ip + MCOUNT_INSN_SIZE
548 * fentry = a set of program to run before calling original function
549 * fexit = a set of program to run after original function
551 * 3. replace direct call instruction anywhere in the function body
552 * or assign a function pointer for indirect call (like tcp_congestion_ops->cong_avoid)
554 * fentry = a set of programs to run before returning from trampoline
555 * With flags = BPF_TRAMP_F_CALL_ORIG
556 * orig_call = original callback addr or direct function addr
557 * fentry = a set of program to run before calling original function
558 * fexit = a set of program to run after original function
560 struct bpf_tramp_image;
561 int arch_prepare_bpf_trampoline(struct bpf_tramp_image *tr, void *image, void *image_end,
562 const struct btf_func_model *m, u32 flags,
563 struct bpf_tramp_progs *tprogs,
565 /* these two functions are called from generated trampoline */
566 u64 notrace __bpf_prog_enter(struct bpf_prog *prog);
567 void notrace __bpf_prog_exit(struct bpf_prog *prog, u64 start);
568 u64 notrace __bpf_prog_enter_sleepable(struct bpf_prog *prog);
569 void notrace __bpf_prog_exit_sleepable(struct bpf_prog *prog, u64 start);
570 void notrace __bpf_tramp_enter(struct bpf_tramp_image *tr);
571 void notrace __bpf_tramp_exit(struct bpf_tramp_image *tr);
576 char name[KSYM_NAME_LEN];
577 struct list_head lnode;
578 struct latch_tree_node tnode;
582 enum bpf_tramp_prog_type {
585 BPF_TRAMP_MODIFY_RETURN,
587 BPF_TRAMP_REPLACE, /* more than MAX */
590 struct bpf_tramp_image {
592 struct bpf_ksym ksym;
593 struct percpu_ref pcref;
598 struct work_struct work;
602 struct bpf_trampoline {
603 /* hlist for trampoline_table */
604 struct hlist_node hlist;
605 /* serializes access to fields of this trampoline */
610 struct btf_func_model model;
614 /* if !NULL this is BPF_PROG_TYPE_EXT program that extends another BPF
615 * program by replacing one of its functions. func.addr is the address
616 * of the function it replaced.
618 struct bpf_prog *extension_prog;
619 /* list of BPF programs using this trampoline */
620 struct hlist_head progs_hlist[BPF_TRAMP_MAX];
621 /* Number of attached programs. A counter per kind. */
622 int progs_cnt[BPF_TRAMP_MAX];
623 /* Executable image of trampoline */
624 struct bpf_tramp_image *cur_image;
628 struct bpf_attach_target_info {
629 struct btf_func_model fmodel;
631 const char *tgt_name;
632 const struct btf_type *tgt_type;
635 #define BPF_DISPATCHER_MAX 48 /* Fits in 2048B */
637 struct bpf_dispatcher_prog {
638 struct bpf_prog *prog;
642 struct bpf_dispatcher {
643 /* dispatcher mutex */
646 struct bpf_dispatcher_prog progs[BPF_DISPATCHER_MAX];
650 struct bpf_ksym ksym;
653 static __always_inline unsigned int bpf_dispatcher_nop_func(
655 const struct bpf_insn *insnsi,
656 unsigned int (*bpf_func)(const void *,
657 const struct bpf_insn *))
659 return bpf_func(ctx, insnsi);
661 #ifdef CONFIG_BPF_JIT
662 int bpf_trampoline_link_prog(struct bpf_prog *prog, struct bpf_trampoline *tr);
663 int bpf_trampoline_unlink_prog(struct bpf_prog *prog, struct bpf_trampoline *tr);
664 struct bpf_trampoline *bpf_trampoline_get(u64 key,
665 struct bpf_attach_target_info *tgt_info);
666 void bpf_trampoline_put(struct bpf_trampoline *tr);
667 #define BPF_DISPATCHER_INIT(_name) { \
668 .mutex = __MUTEX_INITIALIZER(_name.mutex), \
669 .func = &_name##_func, \
676 .lnode = LIST_HEAD_INIT(_name.ksym.lnode), \
680 #define DEFINE_BPF_DISPATCHER(name) \
681 noinline unsigned int bpf_dispatcher_##name##_func( \
683 const struct bpf_insn *insnsi, \
684 unsigned int (*bpf_func)(const void *, \
685 const struct bpf_insn *)) \
687 return bpf_func(ctx, insnsi); \
689 EXPORT_SYMBOL(bpf_dispatcher_##name##_func); \
690 struct bpf_dispatcher bpf_dispatcher_##name = \
691 BPF_DISPATCHER_INIT(bpf_dispatcher_##name);
692 #define DECLARE_BPF_DISPATCHER(name) \
693 unsigned int bpf_dispatcher_##name##_func( \
695 const struct bpf_insn *insnsi, \
696 unsigned int (*bpf_func)(const void *, \
697 const struct bpf_insn *)); \
698 extern struct bpf_dispatcher bpf_dispatcher_##name;
699 #define BPF_DISPATCHER_FUNC(name) bpf_dispatcher_##name##_func
700 #define BPF_DISPATCHER_PTR(name) (&bpf_dispatcher_##name)
701 void bpf_dispatcher_change_prog(struct bpf_dispatcher *d, struct bpf_prog *from,
702 struct bpf_prog *to);
703 /* Called only from JIT-enabled code, so there's no need for stubs. */
704 void *bpf_jit_alloc_exec_page(void);
705 void bpf_image_ksym_add(void *data, struct bpf_ksym *ksym);
706 void bpf_image_ksym_del(struct bpf_ksym *ksym);
707 void bpf_ksym_add(struct bpf_ksym *ksym);
708 void bpf_ksym_del(struct bpf_ksym *ksym);
709 int bpf_jit_charge_modmem(u32 pages);
710 void bpf_jit_uncharge_modmem(u32 pages);
712 static inline int bpf_trampoline_link_prog(struct bpf_prog *prog,
713 struct bpf_trampoline *tr)
717 static inline int bpf_trampoline_unlink_prog(struct bpf_prog *prog,
718 struct bpf_trampoline *tr)
722 static inline struct bpf_trampoline *bpf_trampoline_get(u64 key,
723 struct bpf_attach_target_info *tgt_info)
725 return ERR_PTR(-EOPNOTSUPP);
727 static inline void bpf_trampoline_put(struct bpf_trampoline *tr) {}
728 #define DEFINE_BPF_DISPATCHER(name)
729 #define DECLARE_BPF_DISPATCHER(name)
730 #define BPF_DISPATCHER_FUNC(name) bpf_dispatcher_nop_func
731 #define BPF_DISPATCHER_PTR(name) NULL
732 static inline void bpf_dispatcher_change_prog(struct bpf_dispatcher *d,
733 struct bpf_prog *from,
734 struct bpf_prog *to) {}
735 static inline bool is_bpf_image_address(unsigned long address)
741 struct bpf_func_info_aux {
746 enum bpf_jit_poke_reason {
747 BPF_POKE_REASON_TAIL_CALL,
750 /* Descriptor of pokes pointing /into/ the JITed image. */
751 struct bpf_jit_poke_descriptor {
752 void *tailcall_target;
753 void *tailcall_bypass;
761 bool tailcall_target_stable;
767 /* reg_type info for ctx arguments */
768 struct bpf_ctx_arg_aux {
770 enum bpf_reg_type reg_type;
774 struct btf_mod_pair {
776 struct module *module;
779 struct bpf_prog_aux {
788 u32 func_cnt; /* used by non-func prog as the number of func progs */
789 u32 func_idx; /* 0 for non-func prog, the index in func array for func prog */
790 u32 attach_btf_id; /* in-kernel BTF type id to attach to */
791 u32 ctx_arg_info_size;
792 u32 max_rdonly_access;
794 struct btf *attach_btf;
795 const struct bpf_ctx_arg_aux *ctx_arg_info;
796 struct mutex dst_mutex; /* protects dst_* pointers below, *after* prog becomes visible */
797 struct bpf_prog *dst_prog;
798 struct bpf_trampoline *dst_trampoline;
799 enum bpf_prog_type saved_dst_prog_type;
800 enum bpf_attach_type saved_dst_attach_type;
801 bool verifier_zext; /* Zero extensions has been inserted by verifier. */
802 bool offload_requested;
803 bool attach_btf_trace; /* true if attaching to BTF-enabled raw tp */
804 bool func_proto_unreliable;
806 bool tail_call_reachable;
807 struct hlist_node tramp_hlist;
808 /* BTF_KIND_FUNC_PROTO for valid attach_btf_id */
809 const struct btf_type *attach_func_proto;
810 /* function name for valid attach_btf_id */
811 const char *attach_func_name;
812 struct bpf_prog **func;
813 void *jit_data; /* JIT specific data. arch dependent */
814 struct bpf_jit_poke_descriptor *poke_tab;
816 struct bpf_ksym ksym;
817 const struct bpf_prog_ops *ops;
818 struct bpf_map **used_maps;
819 struct mutex used_maps_mutex; /* mutex for used_maps and used_map_cnt */
820 struct btf_mod_pair *used_btfs;
821 struct bpf_prog *prog;
822 struct user_struct *user;
823 u64 load_time; /* ns since boottime */
824 struct bpf_map *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE];
825 char name[BPF_OBJ_NAME_LEN];
826 #ifdef CONFIG_SECURITY
829 struct bpf_prog_offload *offload;
831 struct bpf_func_info *func_info;
832 struct bpf_func_info_aux *func_info_aux;
833 /* bpf_line_info loaded from userspace. linfo->insn_off
834 * has the xlated insn offset.
835 * Both the main and sub prog share the same linfo.
836 * The subprog can access its first linfo by
837 * using the linfo_idx.
839 struct bpf_line_info *linfo;
840 /* jited_linfo is the jited addr of the linfo. It has a
841 * one to one mapping to linfo:
842 * jited_linfo[i] is the jited addr for the linfo[i]->insn_off.
843 * Both the main and sub prog share the same jited_linfo.
844 * The subprog can access its first jited_linfo by
845 * using the linfo_idx.
850 /* subprog can use linfo_idx to access its first linfo and
852 * main prog always has linfo_idx == 0
856 struct exception_table_entry *extable;
858 struct work_struct work;
863 struct bpf_array_aux {
864 /* 'Ownership' of prog array is claimed by the first program that
865 * is going to use this map or by the first program which FD is
866 * stored in the map to make sure that all callers and callees have
867 * the same prog type and JITed flag.
869 enum bpf_prog_type type;
871 /* Programs with direct jumps into programs part of this array. */
872 struct list_head poke_progs;
874 struct mutex poke_mutex;
875 struct work_struct work;
881 enum bpf_link_type type;
882 const struct bpf_link_ops *ops;
883 struct bpf_prog *prog;
884 struct work_struct work;
887 struct bpf_link_ops {
888 void (*release)(struct bpf_link *link);
889 void (*dealloc)(struct bpf_link *link);
890 int (*detach)(struct bpf_link *link);
891 int (*update_prog)(struct bpf_link *link, struct bpf_prog *new_prog,
892 struct bpf_prog *old_prog);
893 void (*show_fdinfo)(const struct bpf_link *link, struct seq_file *seq);
894 int (*fill_link_info)(const struct bpf_link *link,
895 struct bpf_link_info *info);
898 struct bpf_link_primer {
899 struct bpf_link *link;
905 struct bpf_struct_ops_value;
909 #define BPF_STRUCT_OPS_MAX_NR_MEMBERS 64
910 struct bpf_struct_ops {
911 const struct bpf_verifier_ops *verifier_ops;
912 int (*init)(struct btf *btf);
913 int (*check_member)(const struct btf_type *t,
914 const struct btf_member *member);
915 int (*init_member)(const struct btf_type *t,
916 const struct btf_member *member,
917 void *kdata, const void *udata);
918 int (*reg)(void *kdata);
919 void (*unreg)(void *kdata);
920 const struct btf_type *type;
921 const struct btf_type *value_type;
923 struct btf_func_model func_models[BPF_STRUCT_OPS_MAX_NR_MEMBERS];
928 #if defined(CONFIG_BPF_JIT) && defined(CONFIG_BPF_SYSCALL)
929 #define BPF_MODULE_OWNER ((void *)((0xeB9FUL << 2) + POISON_POINTER_DELTA))
930 const struct bpf_struct_ops *bpf_struct_ops_find(u32 type_id);
931 void bpf_struct_ops_init(struct btf *btf, struct bpf_verifier_log *log);
932 bool bpf_struct_ops_get(const void *kdata);
933 void bpf_struct_ops_put(const void *kdata);
934 int bpf_struct_ops_map_sys_lookup_elem(struct bpf_map *map, void *key,
936 static inline bool bpf_try_module_get(const void *data, struct module *owner)
938 if (owner == BPF_MODULE_OWNER)
939 return bpf_struct_ops_get(data);
941 return try_module_get(owner);
943 static inline void bpf_module_put(const void *data, struct module *owner)
945 if (owner == BPF_MODULE_OWNER)
946 bpf_struct_ops_put(data);
951 static inline const struct bpf_struct_ops *bpf_struct_ops_find(u32 type_id)
955 static inline void bpf_struct_ops_init(struct btf *btf,
956 struct bpf_verifier_log *log)
959 static inline bool bpf_try_module_get(const void *data, struct module *owner)
961 return try_module_get(owner);
963 static inline void bpf_module_put(const void *data, struct module *owner)
967 static inline int bpf_struct_ops_map_sys_lookup_elem(struct bpf_map *map,
979 struct bpf_array_aux *aux;
981 char value[0] __aligned(8);
982 void *ptrs[0] __aligned(8);
983 void __percpu *pptrs[0] __aligned(8);
987 #define BPF_COMPLEXITY_LIMIT_INSNS 1000000 /* yes. 1M insns */
988 #define MAX_TAIL_CALL_CNT 32
990 #define BPF_F_ACCESS_MASK (BPF_F_RDONLY | \
991 BPF_F_RDONLY_PROG | \
995 #define BPF_MAP_CAN_READ BIT(0)
996 #define BPF_MAP_CAN_WRITE BIT(1)
998 static inline u32 bpf_map_flags_to_cap(struct bpf_map *map)
1000 u32 access_flags = map->map_flags & (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG);
1002 /* Combination of BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG is
1005 if (access_flags & BPF_F_RDONLY_PROG)
1006 return BPF_MAP_CAN_READ;
1007 else if (access_flags & BPF_F_WRONLY_PROG)
1008 return BPF_MAP_CAN_WRITE;
1010 return BPF_MAP_CAN_READ | BPF_MAP_CAN_WRITE;
1013 static inline bool bpf_map_flags_access_ok(u32 access_flags)
1015 return (access_flags & (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG)) !=
1016 (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG);
1019 struct bpf_event_entry {
1020 struct perf_event *event;
1021 struct file *perf_file;
1022 struct file *map_file;
1023 struct rcu_head rcu;
1026 bool bpf_prog_array_compatible(struct bpf_array *array, const struct bpf_prog *fp);
1027 int bpf_prog_calc_tag(struct bpf_prog *fp);
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 /* BPF program asks to bypass CAP_NET_BIND_SERVICE in bind. */
1085 #define BPF_RET_BIND_NO_CAP_NET_BIND_SERVICE (1 << 0)
1086 /* BPF program asks to set CN on the packet. */
1087 #define BPF_RET_SET_CN (1 << 0)
1089 #define BPF_PROG_RUN_ARRAY_FLAGS(array, ctx, func, ret_flags) \
1091 struct bpf_prog_array_item *_item; \
1092 struct bpf_prog *_prog; \
1093 struct bpf_prog_array *_array; \
1096 migrate_disable(); \
1098 _array = rcu_dereference(array); \
1099 _item = &_array->items[0]; \
1100 while ((_prog = READ_ONCE(_item->prog))) { \
1101 bpf_cgroup_storage_set(_item->cgroup_storage); \
1102 func_ret = func(_prog, ctx); \
1103 _ret &= (func_ret & 1); \
1104 *(ret_flags) |= (func_ret >> 1); \
1107 rcu_read_unlock(); \
1112 #define __BPF_PROG_RUN_ARRAY(array, ctx, func, check_non_null, set_cg_storage) \
1114 struct bpf_prog_array_item *_item; \
1115 struct bpf_prog *_prog; \
1116 struct bpf_prog_array *_array; \
1118 migrate_disable(); \
1120 _array = rcu_dereference(array); \
1121 if (unlikely(check_non_null && !_array))\
1123 _item = &_array->items[0]; \
1124 while ((_prog = READ_ONCE(_item->prog))) { \
1125 if (set_cg_storage) \
1126 bpf_cgroup_storage_set(_item->cgroup_storage); \
1127 _ret &= func(_prog, ctx); \
1131 rcu_read_unlock(); \
1136 /* To be used by __cgroup_bpf_run_filter_skb for EGRESS BPF progs
1137 * so BPF programs can request cwr for TCP packets.
1139 * Current cgroup skb programs can only return 0 or 1 (0 to drop the
1140 * packet. This macro changes the behavior so the low order bit
1141 * indicates whether the packet should be dropped (0) or not (1)
1142 * and the next bit is a congestion notification bit. This could be
1143 * used by TCP to call tcp_enter_cwr()
1145 * Hence, new allowed return values of CGROUP EGRESS BPF programs are:
1148 * 2: drop packet and cn
1149 * 3: keep packet and cn
1151 * This macro then converts it to one of the NET_XMIT or an error
1152 * code that is then interpreted as drop packet (and no cn):
1153 * 0: NET_XMIT_SUCCESS skb should be transmitted
1154 * 1: NET_XMIT_DROP skb should be dropped and cn
1155 * 2: NET_XMIT_CN skb should be transmitted and cn
1156 * 3: -EPERM skb should be dropped
1158 #define BPF_PROG_CGROUP_INET_EGRESS_RUN_ARRAY(array, ctx, func) \
1163 _ret = BPF_PROG_RUN_ARRAY_FLAGS(array, ctx, func, &_flags); \
1164 _cn = _flags & BPF_RET_SET_CN; \
1166 _ret = (_cn ? NET_XMIT_CN : NET_XMIT_SUCCESS); \
1168 _ret = (_cn ? NET_XMIT_DROP : -EPERM); \
1172 #define BPF_PROG_RUN_ARRAY(array, ctx, func) \
1173 __BPF_PROG_RUN_ARRAY(array, ctx, func, false, true)
1175 #define BPF_PROG_RUN_ARRAY_CHECK(array, ctx, func) \
1176 __BPF_PROG_RUN_ARRAY(array, ctx, func, true, false)
1178 #ifdef CONFIG_BPF_SYSCALL
1179 DECLARE_PER_CPU(int, bpf_prog_active);
1180 extern struct mutex bpf_stats_enabled_mutex;
1183 * Block execution of BPF programs attached to instrumentation (perf,
1184 * kprobes, tracepoints) to prevent deadlocks on map operations as any of
1185 * these events can happen inside a region which holds a map bucket lock
1186 * and can deadlock on it.
1188 * Use the preemption safe inc/dec variants on RT because migrate disable
1189 * is preemptible on RT and preemption in the middle of the RMW operation
1190 * might lead to inconsistent state. Use the raw variants for non RT
1191 * kernels as migrate_disable() maps to preempt_disable() so the slightly
1192 * more expensive save operation can be avoided.
1194 static inline void bpf_disable_instrumentation(void)
1197 if (IS_ENABLED(CONFIG_PREEMPT_RT))
1198 this_cpu_inc(bpf_prog_active);
1200 __this_cpu_inc(bpf_prog_active);
1203 static inline void bpf_enable_instrumentation(void)
1205 if (IS_ENABLED(CONFIG_PREEMPT_RT))
1206 this_cpu_dec(bpf_prog_active);
1208 __this_cpu_dec(bpf_prog_active);
1212 extern const struct file_operations bpf_map_fops;
1213 extern const struct file_operations bpf_prog_fops;
1214 extern const struct file_operations bpf_iter_fops;
1216 #define BPF_PROG_TYPE(_id, _name, prog_ctx_type, kern_ctx_type) \
1217 extern const struct bpf_prog_ops _name ## _prog_ops; \
1218 extern const struct bpf_verifier_ops _name ## _verifier_ops;
1219 #define BPF_MAP_TYPE(_id, _ops) \
1220 extern const struct bpf_map_ops _ops;
1221 #define BPF_LINK_TYPE(_id, _name)
1222 #include <linux/bpf_types.h>
1223 #undef BPF_PROG_TYPE
1225 #undef BPF_LINK_TYPE
1227 extern const struct bpf_prog_ops bpf_offload_prog_ops;
1228 extern const struct bpf_verifier_ops tc_cls_act_analyzer_ops;
1229 extern const struct bpf_verifier_ops xdp_analyzer_ops;
1231 struct bpf_prog *bpf_prog_get(u32 ufd);
1232 struct bpf_prog *bpf_prog_get_type_dev(u32 ufd, enum bpf_prog_type type,
1234 void bpf_prog_add(struct bpf_prog *prog, int i);
1235 void bpf_prog_sub(struct bpf_prog *prog, int i);
1236 void bpf_prog_inc(struct bpf_prog *prog);
1237 struct bpf_prog * __must_check bpf_prog_inc_not_zero(struct bpf_prog *prog);
1238 void bpf_prog_put(struct bpf_prog *prog);
1240 void bpf_prog_free_id(struct bpf_prog *prog, bool do_idr_lock);
1241 void bpf_map_free_id(struct bpf_map *map, bool do_idr_lock);
1243 struct bpf_map *bpf_map_get(u32 ufd);
1244 struct bpf_map *bpf_map_get_with_uref(u32 ufd);
1245 struct bpf_map *__bpf_map_get(struct fd f);
1246 void bpf_map_inc(struct bpf_map *map);
1247 void bpf_map_inc_with_uref(struct bpf_map *map);
1248 struct bpf_map * __must_check bpf_map_inc_not_zero(struct bpf_map *map);
1249 void bpf_map_put_with_uref(struct bpf_map *map);
1250 void bpf_map_put(struct bpf_map *map);
1251 void *bpf_map_area_alloc(u64 size, int numa_node);
1252 void *bpf_map_area_mmapable_alloc(u64 size, int numa_node);
1253 void bpf_map_area_free(void *base);
1254 void bpf_map_init_from_attr(struct bpf_map *map, union bpf_attr *attr);
1255 int generic_map_lookup_batch(struct bpf_map *map,
1256 const union bpf_attr *attr,
1257 union bpf_attr __user *uattr);
1258 int generic_map_update_batch(struct bpf_map *map,
1259 const union bpf_attr *attr,
1260 union bpf_attr __user *uattr);
1261 int generic_map_delete_batch(struct bpf_map *map,
1262 const union bpf_attr *attr,
1263 union bpf_attr __user *uattr);
1264 struct bpf_map *bpf_map_get_curr_or_next(u32 *id);
1265 struct bpf_prog *bpf_prog_get_curr_or_next(u32 *id);
1267 #ifdef CONFIG_MEMCG_KMEM
1268 void *bpf_map_kmalloc_node(const struct bpf_map *map, size_t size, gfp_t flags,
1270 void *bpf_map_kzalloc(const struct bpf_map *map, size_t size, gfp_t flags);
1271 void __percpu *bpf_map_alloc_percpu(const struct bpf_map *map, size_t size,
1272 size_t align, gfp_t flags);
1274 static inline void *
1275 bpf_map_kmalloc_node(const struct bpf_map *map, size_t size, gfp_t flags,
1278 return kmalloc_node(size, flags, node);
1281 static inline void *
1282 bpf_map_kzalloc(const struct bpf_map *map, size_t size, gfp_t flags)
1284 return kzalloc(size, flags);
1287 static inline void __percpu *
1288 bpf_map_alloc_percpu(const struct bpf_map *map, size_t size, size_t align,
1291 return __alloc_percpu_gfp(size, align, flags);
1295 extern int sysctl_unprivileged_bpf_disabled;
1297 static inline bool bpf_allow_ptr_leaks(void)
1299 return perfmon_capable();
1302 static inline bool bpf_allow_uninit_stack(void)
1304 return perfmon_capable();
1307 static inline bool bpf_allow_ptr_to_map_access(void)
1309 return perfmon_capable();
1312 static inline bool bpf_bypass_spec_v1(void)
1314 return perfmon_capable();
1317 static inline bool bpf_bypass_spec_v4(void)
1319 return perfmon_capable();
1322 int bpf_map_new_fd(struct bpf_map *map, int flags);
1323 int bpf_prog_new_fd(struct bpf_prog *prog);
1325 void bpf_link_init(struct bpf_link *link, enum bpf_link_type type,
1326 const struct bpf_link_ops *ops, struct bpf_prog *prog);
1327 int bpf_link_prime(struct bpf_link *link, struct bpf_link_primer *primer);
1328 int bpf_link_settle(struct bpf_link_primer *primer);
1329 void bpf_link_cleanup(struct bpf_link_primer *primer);
1330 void bpf_link_inc(struct bpf_link *link);
1331 void bpf_link_put(struct bpf_link *link);
1332 int bpf_link_new_fd(struct bpf_link *link);
1333 struct file *bpf_link_new_file(struct bpf_link *link, int *reserved_fd);
1334 struct bpf_link *bpf_link_get_from_fd(u32 ufd);
1336 int bpf_obj_pin_user(u32 ufd, const char __user *pathname);
1337 int bpf_obj_get_user(const char __user *pathname, int flags);
1339 #define BPF_ITER_FUNC_PREFIX "bpf_iter_"
1340 #define DEFINE_BPF_ITER_FUNC(target, args...) \
1341 extern int bpf_iter_ ## target(args); \
1342 int __init bpf_iter_ ## target(args) { return 0; }
1344 struct bpf_iter_aux_info {
1345 struct bpf_map *map;
1348 typedef int (*bpf_iter_attach_target_t)(struct bpf_prog *prog,
1349 union bpf_iter_link_info *linfo,
1350 struct bpf_iter_aux_info *aux);
1351 typedef void (*bpf_iter_detach_target_t)(struct bpf_iter_aux_info *aux);
1352 typedef void (*bpf_iter_show_fdinfo_t) (const struct bpf_iter_aux_info *aux,
1353 struct seq_file *seq);
1354 typedef int (*bpf_iter_fill_link_info_t)(const struct bpf_iter_aux_info *aux,
1355 struct bpf_link_info *info);
1357 enum bpf_iter_feature {
1358 BPF_ITER_RESCHED = BIT(0),
1361 #define BPF_ITER_CTX_ARG_MAX 2
1362 struct bpf_iter_reg {
1364 bpf_iter_attach_target_t attach_target;
1365 bpf_iter_detach_target_t detach_target;
1366 bpf_iter_show_fdinfo_t show_fdinfo;
1367 bpf_iter_fill_link_info_t fill_link_info;
1368 u32 ctx_arg_info_size;
1370 struct bpf_ctx_arg_aux ctx_arg_info[BPF_ITER_CTX_ARG_MAX];
1371 const struct bpf_iter_seq_info *seq_info;
1374 struct bpf_iter_meta {
1375 __bpf_md_ptr(struct seq_file *, seq);
1380 struct bpf_iter__bpf_map_elem {
1381 __bpf_md_ptr(struct bpf_iter_meta *, meta);
1382 __bpf_md_ptr(struct bpf_map *, map);
1383 __bpf_md_ptr(void *, key);
1384 __bpf_md_ptr(void *, value);
1387 int bpf_iter_reg_target(const struct bpf_iter_reg *reg_info);
1388 void bpf_iter_unreg_target(const struct bpf_iter_reg *reg_info);
1389 bool bpf_iter_prog_supported(struct bpf_prog *prog);
1390 int bpf_iter_link_attach(const union bpf_attr *attr, struct bpf_prog *prog);
1391 int bpf_iter_new_fd(struct bpf_link *link);
1392 bool bpf_link_is_iter(struct bpf_link *link);
1393 struct bpf_prog *bpf_iter_get_info(struct bpf_iter_meta *meta, bool in_stop);
1394 int bpf_iter_run_prog(struct bpf_prog *prog, void *ctx);
1395 void bpf_iter_map_show_fdinfo(const struct bpf_iter_aux_info *aux,
1396 struct seq_file *seq);
1397 int bpf_iter_map_fill_link_info(const struct bpf_iter_aux_info *aux,
1398 struct bpf_link_info *info);
1400 int bpf_percpu_hash_copy(struct bpf_map *map, void *key, void *value);
1401 int bpf_percpu_array_copy(struct bpf_map *map, void *key, void *value);
1402 int bpf_percpu_hash_update(struct bpf_map *map, void *key, void *value,
1404 int bpf_percpu_array_update(struct bpf_map *map, void *key, void *value,
1407 int bpf_stackmap_copy(struct bpf_map *map, void *key, void *value);
1409 int bpf_fd_array_map_update_elem(struct bpf_map *map, struct file *map_file,
1410 void *key, void *value, u64 map_flags);
1411 int bpf_fd_array_map_lookup_elem(struct bpf_map *map, void *key, u32 *value);
1412 int bpf_fd_htab_map_update_elem(struct bpf_map *map, struct file *map_file,
1413 void *key, void *value, u64 map_flags);
1414 int bpf_fd_htab_map_lookup_elem(struct bpf_map *map, void *key, u32 *value);
1416 int bpf_get_file_flag(int flags);
1417 int bpf_check_uarg_tail_zero(void __user *uaddr, size_t expected_size,
1418 size_t actual_size);
1420 /* memcpy that is used with 8-byte aligned pointers, power-of-8 size and
1421 * forced to use 'long' read/writes to try to atomically copy long counters.
1422 * Best-effort only. No barriers here, since it _will_ race with concurrent
1423 * updates from BPF programs. Called from bpf syscall and mostly used with
1424 * size 8 or 16 bytes, so ask compiler to inline it.
1426 static inline void bpf_long_memcpy(void *dst, const void *src, u32 size)
1428 const long *lsrc = src;
1431 size /= sizeof(long);
1436 /* verify correctness of eBPF program */
1437 int bpf_check(struct bpf_prog **fp, union bpf_attr *attr,
1438 union bpf_attr __user *uattr);
1440 #ifndef CONFIG_BPF_JIT_ALWAYS_ON
1441 void bpf_patch_call_args(struct bpf_insn *insn, u32 stack_depth);
1444 struct btf *bpf_get_btf_vmlinux(void);
1450 struct bpf_dtab_netdev *__dev_map_lookup_elem(struct bpf_map *map, u32 key);
1451 struct bpf_dtab_netdev *__dev_map_hash_lookup_elem(struct bpf_map *map, u32 key);
1452 void __dev_flush(void);
1453 int dev_xdp_enqueue(struct net_device *dev, struct xdp_buff *xdp,
1454 struct net_device *dev_rx);
1455 int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp,
1456 struct net_device *dev_rx);
1457 int dev_map_generic_redirect(struct bpf_dtab_netdev *dst, struct sk_buff *skb,
1458 struct bpf_prog *xdp_prog);
1459 bool dev_map_can_have_prog(struct bpf_map *map);
1461 struct bpf_cpu_map_entry *__cpu_map_lookup_elem(struct bpf_map *map, u32 key);
1462 void __cpu_map_flush(void);
1463 int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu, struct xdp_buff *xdp,
1464 struct net_device *dev_rx);
1465 bool cpu_map_prog_allowed(struct bpf_map *map);
1467 /* Return map's numa specified by userspace */
1468 static inline int bpf_map_attr_numa_node(const union bpf_attr *attr)
1470 return (attr->map_flags & BPF_F_NUMA_NODE) ?
1471 attr->numa_node : NUMA_NO_NODE;
1474 struct bpf_prog *bpf_prog_get_type_path(const char *name, enum bpf_prog_type type);
1475 int array_map_alloc_check(union bpf_attr *attr);
1477 int bpf_prog_test_run_xdp(struct bpf_prog *prog, const union bpf_attr *kattr,
1478 union bpf_attr __user *uattr);
1479 int bpf_prog_test_run_skb(struct bpf_prog *prog, const union bpf_attr *kattr,
1480 union bpf_attr __user *uattr);
1481 int bpf_prog_test_run_tracing(struct bpf_prog *prog,
1482 const union bpf_attr *kattr,
1483 union bpf_attr __user *uattr);
1484 int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog,
1485 const union bpf_attr *kattr,
1486 union bpf_attr __user *uattr);
1487 int bpf_prog_test_run_raw_tp(struct bpf_prog *prog,
1488 const union bpf_attr *kattr,
1489 union bpf_attr __user *uattr);
1490 bool btf_ctx_access(int off, int size, enum bpf_access_type type,
1491 const struct bpf_prog *prog,
1492 struct bpf_insn_access_aux *info);
1493 int btf_struct_access(struct bpf_verifier_log *log, const struct btf *btf,
1494 const struct btf_type *t, int off, int size,
1495 enum bpf_access_type atype,
1497 bool btf_struct_ids_match(struct bpf_verifier_log *log,
1498 const struct btf *btf, u32 id, int off,
1499 const struct btf *need_btf, u32 need_type_id);
1501 int btf_distill_func_proto(struct bpf_verifier_log *log,
1503 const struct btf_type *func_proto,
1504 const char *func_name,
1505 struct btf_func_model *m);
1507 struct bpf_reg_state;
1508 int btf_check_func_arg_match(struct bpf_verifier_env *env, int subprog,
1509 struct bpf_reg_state *regs);
1510 int btf_prepare_func_args(struct bpf_verifier_env *env, int subprog,
1511 struct bpf_reg_state *reg);
1512 int btf_check_type_match(struct bpf_verifier_log *log, const struct bpf_prog *prog,
1513 struct btf *btf, const struct btf_type *t);
1515 struct bpf_prog *bpf_prog_by_id(u32 id);
1516 struct bpf_link *bpf_link_by_id(u32 id);
1518 const struct bpf_func_proto *bpf_base_func_proto(enum bpf_func_id func_id);
1519 #else /* !CONFIG_BPF_SYSCALL */
1520 static inline struct bpf_prog *bpf_prog_get(u32 ufd)
1522 return ERR_PTR(-EOPNOTSUPP);
1525 static inline struct bpf_prog *bpf_prog_get_type_dev(u32 ufd,
1526 enum bpf_prog_type type,
1529 return ERR_PTR(-EOPNOTSUPP);
1532 static inline void bpf_prog_add(struct bpf_prog *prog, int i)
1536 static inline void bpf_prog_sub(struct bpf_prog *prog, int i)
1540 static inline void bpf_prog_put(struct bpf_prog *prog)
1544 static inline void bpf_prog_inc(struct bpf_prog *prog)
1548 static inline struct bpf_prog *__must_check
1549 bpf_prog_inc_not_zero(struct bpf_prog *prog)
1551 return ERR_PTR(-EOPNOTSUPP);
1554 static inline void bpf_link_init(struct bpf_link *link, enum bpf_link_type type,
1555 const struct bpf_link_ops *ops,
1556 struct bpf_prog *prog)
1560 static inline int bpf_link_prime(struct bpf_link *link,
1561 struct bpf_link_primer *primer)
1566 static inline int bpf_link_settle(struct bpf_link_primer *primer)
1571 static inline void bpf_link_cleanup(struct bpf_link_primer *primer)
1575 static inline void bpf_link_inc(struct bpf_link *link)
1579 static inline void bpf_link_put(struct bpf_link *link)
1583 static inline int bpf_obj_get_user(const char __user *pathname, int flags)
1588 static inline struct net_device *__dev_map_lookup_elem(struct bpf_map *map,
1594 static inline struct net_device *__dev_map_hash_lookup_elem(struct bpf_map *map,
1599 static inline bool dev_map_can_have_prog(struct bpf_map *map)
1604 static inline void __dev_flush(void)
1609 struct bpf_dtab_netdev;
1612 int dev_xdp_enqueue(struct net_device *dev, struct xdp_buff *xdp,
1613 struct net_device *dev_rx)
1619 int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp,
1620 struct net_device *dev_rx)
1627 static inline int dev_map_generic_redirect(struct bpf_dtab_netdev *dst,
1628 struct sk_buff *skb,
1629 struct bpf_prog *xdp_prog)
1635 struct bpf_cpu_map_entry *__cpu_map_lookup_elem(struct bpf_map *map, u32 key)
1640 static inline void __cpu_map_flush(void)
1644 static inline int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu,
1645 struct xdp_buff *xdp,
1646 struct net_device *dev_rx)
1651 static inline bool cpu_map_prog_allowed(struct bpf_map *map)
1656 static inline struct bpf_prog *bpf_prog_get_type_path(const char *name,
1657 enum bpf_prog_type type)
1659 return ERR_PTR(-EOPNOTSUPP);
1662 static inline int bpf_prog_test_run_xdp(struct bpf_prog *prog,
1663 const union bpf_attr *kattr,
1664 union bpf_attr __user *uattr)
1669 static inline int bpf_prog_test_run_skb(struct bpf_prog *prog,
1670 const union bpf_attr *kattr,
1671 union bpf_attr __user *uattr)
1676 static inline int bpf_prog_test_run_tracing(struct bpf_prog *prog,
1677 const union bpf_attr *kattr,
1678 union bpf_attr __user *uattr)
1683 static inline int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog,
1684 const union bpf_attr *kattr,
1685 union bpf_attr __user *uattr)
1690 static inline void bpf_map_put(struct bpf_map *map)
1694 static inline struct bpf_prog *bpf_prog_by_id(u32 id)
1696 return ERR_PTR(-ENOTSUPP);
1699 static inline const struct bpf_func_proto *
1700 bpf_base_func_proto(enum bpf_func_id func_id)
1704 #endif /* CONFIG_BPF_SYSCALL */
1706 void __bpf_free_used_btfs(struct bpf_prog_aux *aux,
1707 struct btf_mod_pair *used_btfs, u32 len);
1709 static inline struct bpf_prog *bpf_prog_get_type(u32 ufd,
1710 enum bpf_prog_type type)
1712 return bpf_prog_get_type_dev(ufd, type, false);
1715 void __bpf_free_used_maps(struct bpf_prog_aux *aux,
1716 struct bpf_map **used_maps, u32 len);
1718 bool bpf_prog_get_ok(struct bpf_prog *, enum bpf_prog_type *, bool);
1720 int bpf_prog_offload_compile(struct bpf_prog *prog);
1721 void bpf_prog_offload_destroy(struct bpf_prog *prog);
1722 int bpf_prog_offload_info_fill(struct bpf_prog_info *info,
1723 struct bpf_prog *prog);
1725 int bpf_map_offload_info_fill(struct bpf_map_info *info, struct bpf_map *map);
1727 int bpf_map_offload_lookup_elem(struct bpf_map *map, void *key, void *value);
1728 int bpf_map_offload_update_elem(struct bpf_map *map,
1729 void *key, void *value, u64 flags);
1730 int bpf_map_offload_delete_elem(struct bpf_map *map, void *key);
1731 int bpf_map_offload_get_next_key(struct bpf_map *map,
1732 void *key, void *next_key);
1734 bool bpf_offload_prog_map_match(struct bpf_prog *prog, struct bpf_map *map);
1736 struct bpf_offload_dev *
1737 bpf_offload_dev_create(const struct bpf_prog_offload_ops *ops, void *priv);
1738 void bpf_offload_dev_destroy(struct bpf_offload_dev *offdev);
1739 void *bpf_offload_dev_priv(struct bpf_offload_dev *offdev);
1740 int bpf_offload_dev_netdev_register(struct bpf_offload_dev *offdev,
1741 struct net_device *netdev);
1742 void bpf_offload_dev_netdev_unregister(struct bpf_offload_dev *offdev,
1743 struct net_device *netdev);
1744 bool bpf_offload_dev_match(struct bpf_prog *prog, struct net_device *netdev);
1746 #if defined(CONFIG_NET) && defined(CONFIG_BPF_SYSCALL)
1747 int bpf_prog_offload_init(struct bpf_prog *prog, union bpf_attr *attr);
1749 static inline bool bpf_prog_is_dev_bound(const struct bpf_prog_aux *aux)
1751 return aux->offload_requested;
1754 static inline bool bpf_map_is_dev_bound(struct bpf_map *map)
1756 return unlikely(map->ops == &bpf_map_offload_ops);
1759 struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr);
1760 void bpf_map_offload_map_free(struct bpf_map *map);
1762 static inline int bpf_prog_offload_init(struct bpf_prog *prog,
1763 union bpf_attr *attr)
1768 static inline bool bpf_prog_is_dev_bound(struct bpf_prog_aux *aux)
1773 static inline bool bpf_map_is_dev_bound(struct bpf_map *map)
1778 static inline struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr)
1780 return ERR_PTR(-EOPNOTSUPP);
1783 static inline void bpf_map_offload_map_free(struct bpf_map *map)
1786 #endif /* CONFIG_NET && CONFIG_BPF_SYSCALL */
1788 #if defined(CONFIG_BPF_STREAM_PARSER)
1789 int sock_map_prog_update(struct bpf_map *map, struct bpf_prog *prog,
1790 struct bpf_prog *old, u32 which);
1791 int sock_map_get_from_fd(const union bpf_attr *attr, struct bpf_prog *prog);
1792 int sock_map_prog_detach(const union bpf_attr *attr, enum bpf_prog_type ptype);
1793 int sock_map_update_elem_sys(struct bpf_map *map, void *key, void *value, u64 flags);
1794 void sock_map_unhash(struct sock *sk);
1795 void sock_map_close(struct sock *sk, long timeout);
1797 static inline int sock_map_prog_update(struct bpf_map *map,
1798 struct bpf_prog *prog,
1799 struct bpf_prog *old, u32 which)
1804 static inline int sock_map_get_from_fd(const union bpf_attr *attr,
1805 struct bpf_prog *prog)
1810 static inline int sock_map_prog_detach(const union bpf_attr *attr,
1811 enum bpf_prog_type ptype)
1816 static inline int sock_map_update_elem_sys(struct bpf_map *map, void *key, void *value,
1821 #endif /* CONFIG_BPF_STREAM_PARSER */
1823 #if defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL)
1824 void bpf_sk_reuseport_detach(struct sock *sk);
1825 int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map, void *key,
1827 int bpf_fd_reuseport_array_update_elem(struct bpf_map *map, void *key,
1828 void *value, u64 map_flags);
1830 static inline void bpf_sk_reuseport_detach(struct sock *sk)
1834 #ifdef CONFIG_BPF_SYSCALL
1835 static inline int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map,
1836 void *key, void *value)
1841 static inline int bpf_fd_reuseport_array_update_elem(struct bpf_map *map,
1842 void *key, void *value,
1847 #endif /* CONFIG_BPF_SYSCALL */
1848 #endif /* defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL) */
1850 /* verifier prototypes for helper functions called from eBPF programs */
1851 extern const struct bpf_func_proto bpf_map_lookup_elem_proto;
1852 extern const struct bpf_func_proto bpf_map_update_elem_proto;
1853 extern const struct bpf_func_proto bpf_map_delete_elem_proto;
1854 extern const struct bpf_func_proto bpf_map_push_elem_proto;
1855 extern const struct bpf_func_proto bpf_map_pop_elem_proto;
1856 extern const struct bpf_func_proto bpf_map_peek_elem_proto;
1858 extern const struct bpf_func_proto bpf_get_prandom_u32_proto;
1859 extern const struct bpf_func_proto bpf_get_smp_processor_id_proto;
1860 extern const struct bpf_func_proto bpf_get_numa_node_id_proto;
1861 extern const struct bpf_func_proto bpf_tail_call_proto;
1862 extern const struct bpf_func_proto bpf_ktime_get_ns_proto;
1863 extern const struct bpf_func_proto bpf_ktime_get_boot_ns_proto;
1864 extern const struct bpf_func_proto bpf_get_current_pid_tgid_proto;
1865 extern const struct bpf_func_proto bpf_get_current_uid_gid_proto;
1866 extern const struct bpf_func_proto bpf_get_current_comm_proto;
1867 extern const struct bpf_func_proto bpf_get_stackid_proto;
1868 extern const struct bpf_func_proto bpf_get_stack_proto;
1869 extern const struct bpf_func_proto bpf_get_task_stack_proto;
1870 extern const struct bpf_func_proto bpf_get_stackid_proto_pe;
1871 extern const struct bpf_func_proto bpf_get_stack_proto_pe;
1872 extern const struct bpf_func_proto bpf_sock_map_update_proto;
1873 extern const struct bpf_func_proto bpf_sock_hash_update_proto;
1874 extern const struct bpf_func_proto bpf_get_current_cgroup_id_proto;
1875 extern const struct bpf_func_proto bpf_get_current_ancestor_cgroup_id_proto;
1876 extern const struct bpf_func_proto bpf_msg_redirect_hash_proto;
1877 extern const struct bpf_func_proto bpf_msg_redirect_map_proto;
1878 extern const struct bpf_func_proto bpf_sk_redirect_hash_proto;
1879 extern const struct bpf_func_proto bpf_sk_redirect_map_proto;
1880 extern const struct bpf_func_proto bpf_spin_lock_proto;
1881 extern const struct bpf_func_proto bpf_spin_unlock_proto;
1882 extern const struct bpf_func_proto bpf_get_local_storage_proto;
1883 extern const struct bpf_func_proto bpf_strtol_proto;
1884 extern const struct bpf_func_proto bpf_strtoul_proto;
1885 extern const struct bpf_func_proto bpf_tcp_sock_proto;
1886 extern const struct bpf_func_proto bpf_jiffies64_proto;
1887 extern const struct bpf_func_proto bpf_get_ns_current_pid_tgid_proto;
1888 extern const struct bpf_func_proto bpf_event_output_data_proto;
1889 extern const struct bpf_func_proto bpf_ringbuf_output_proto;
1890 extern const struct bpf_func_proto bpf_ringbuf_reserve_proto;
1891 extern const struct bpf_func_proto bpf_ringbuf_submit_proto;
1892 extern const struct bpf_func_proto bpf_ringbuf_discard_proto;
1893 extern const struct bpf_func_proto bpf_ringbuf_query_proto;
1894 extern const struct bpf_func_proto bpf_skc_to_tcp6_sock_proto;
1895 extern const struct bpf_func_proto bpf_skc_to_tcp_sock_proto;
1896 extern const struct bpf_func_proto bpf_skc_to_tcp_timewait_sock_proto;
1897 extern const struct bpf_func_proto bpf_skc_to_tcp_request_sock_proto;
1898 extern const struct bpf_func_proto bpf_skc_to_udp6_sock_proto;
1899 extern const struct bpf_func_proto bpf_copy_from_user_proto;
1900 extern const struct bpf_func_proto bpf_snprintf_btf_proto;
1901 extern const struct bpf_func_proto bpf_per_cpu_ptr_proto;
1902 extern const struct bpf_func_proto bpf_this_cpu_ptr_proto;
1903 extern const struct bpf_func_proto bpf_ktime_get_coarse_ns_proto;
1904 extern const struct bpf_func_proto bpf_sock_from_file_proto;
1905 extern const struct bpf_func_proto bpf_get_socket_ptr_cookie_proto;
1907 const struct bpf_func_proto *bpf_tracing_func_proto(
1908 enum bpf_func_id func_id, const struct bpf_prog *prog);
1910 const struct bpf_func_proto *tracing_prog_func_proto(
1911 enum bpf_func_id func_id, const struct bpf_prog *prog);
1913 /* Shared helpers among cBPF and eBPF. */
1914 void bpf_user_rnd_init_once(void);
1915 u64 bpf_user_rnd_u32(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
1916 u64 bpf_get_raw_cpu_id(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
1918 #if defined(CONFIG_NET)
1919 bool bpf_sock_common_is_valid_access(int off, int size,
1920 enum bpf_access_type type,
1921 struct bpf_insn_access_aux *info);
1922 bool bpf_sock_is_valid_access(int off, int size, enum bpf_access_type type,
1923 struct bpf_insn_access_aux *info);
1924 u32 bpf_sock_convert_ctx_access(enum bpf_access_type type,
1925 const struct bpf_insn *si,
1926 struct bpf_insn *insn_buf,
1927 struct bpf_prog *prog,
1930 static inline bool bpf_sock_common_is_valid_access(int off, int size,
1931 enum bpf_access_type type,
1932 struct bpf_insn_access_aux *info)
1936 static inline bool bpf_sock_is_valid_access(int off, int size,
1937 enum bpf_access_type type,
1938 struct bpf_insn_access_aux *info)
1942 static inline u32 bpf_sock_convert_ctx_access(enum bpf_access_type type,
1943 const struct bpf_insn *si,
1944 struct bpf_insn *insn_buf,
1945 struct bpf_prog *prog,
1953 struct sk_reuseport_kern {
1954 struct sk_buff *skb;
1956 struct sock *selected_sk;
1962 bool bpf_tcp_sock_is_valid_access(int off, int size, enum bpf_access_type type,
1963 struct bpf_insn_access_aux *info);
1965 u32 bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type,
1966 const struct bpf_insn *si,
1967 struct bpf_insn *insn_buf,
1968 struct bpf_prog *prog,
1971 bool bpf_xdp_sock_is_valid_access(int off, int size, enum bpf_access_type type,
1972 struct bpf_insn_access_aux *info);
1974 u32 bpf_xdp_sock_convert_ctx_access(enum bpf_access_type type,
1975 const struct bpf_insn *si,
1976 struct bpf_insn *insn_buf,
1977 struct bpf_prog *prog,
1980 static inline bool bpf_tcp_sock_is_valid_access(int off, int size,
1981 enum bpf_access_type type,
1982 struct bpf_insn_access_aux *info)
1987 static inline u32 bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type,
1988 const struct bpf_insn *si,
1989 struct bpf_insn *insn_buf,
1990 struct bpf_prog *prog,
1995 static inline bool bpf_xdp_sock_is_valid_access(int off, int size,
1996 enum bpf_access_type type,
1997 struct bpf_insn_access_aux *info)
2002 static inline u32 bpf_xdp_sock_convert_ctx_access(enum bpf_access_type type,
2003 const struct bpf_insn *si,
2004 struct bpf_insn *insn_buf,
2005 struct bpf_prog *prog,
2010 #endif /* CONFIG_INET */
2012 enum bpf_text_poke_type {
2017 int bpf_arch_text_poke(void *ip, enum bpf_text_poke_type t,
2018 void *addr1, void *addr2);
2021 bool btf_id_set_contains(const struct btf_id_set *set, u32 id);
2023 #endif /* _LINUX_BPF_H */