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>
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;
43 extern struct idr btf_idr;
44 extern spinlock_t btf_idr_lock;
45 extern struct kobject *btf_kobj;
47 typedef int (*bpf_iter_init_seq_priv_t)(void *private_data,
48 struct bpf_iter_aux_info *aux);
49 typedef void (*bpf_iter_fini_seq_priv_t)(void *private_data);
50 struct bpf_iter_seq_info {
51 const struct seq_operations *seq_ops;
52 bpf_iter_init_seq_priv_t init_seq_private;
53 bpf_iter_fini_seq_priv_t fini_seq_private;
57 /* map is generic key/value storage optionally accesible by eBPF programs */
59 /* funcs callable from userspace (via syscall) */
60 int (*map_alloc_check)(union bpf_attr *attr);
61 struct bpf_map *(*map_alloc)(union bpf_attr *attr);
62 void (*map_release)(struct bpf_map *map, struct file *map_file);
63 void (*map_free)(struct bpf_map *map);
64 int (*map_get_next_key)(struct bpf_map *map, void *key, void *next_key);
65 void (*map_release_uref)(struct bpf_map *map);
66 void *(*map_lookup_elem_sys_only)(struct bpf_map *map, void *key);
67 int (*map_lookup_batch)(struct bpf_map *map, const union bpf_attr *attr,
68 union bpf_attr __user *uattr);
69 int (*map_lookup_and_delete_batch)(struct bpf_map *map,
70 const union bpf_attr *attr,
71 union bpf_attr __user *uattr);
72 int (*map_update_batch)(struct bpf_map *map, const union bpf_attr *attr,
73 union bpf_attr __user *uattr);
74 int (*map_delete_batch)(struct bpf_map *map, const union bpf_attr *attr,
75 union bpf_attr __user *uattr);
77 /* funcs callable from userspace and from eBPF programs */
78 void *(*map_lookup_elem)(struct bpf_map *map, void *key);
79 int (*map_update_elem)(struct bpf_map *map, void *key, void *value, u64 flags);
80 int (*map_delete_elem)(struct bpf_map *map, void *key);
81 int (*map_push_elem)(struct bpf_map *map, void *value, u64 flags);
82 int (*map_pop_elem)(struct bpf_map *map, void *value);
83 int (*map_peek_elem)(struct bpf_map *map, void *value);
85 /* funcs called by prog_array and perf_event_array map */
86 void *(*map_fd_get_ptr)(struct bpf_map *map, struct file *map_file,
88 void (*map_fd_put_ptr)(void *ptr);
89 int (*map_gen_lookup)(struct bpf_map *map, struct bpf_insn *insn_buf);
90 u32 (*map_fd_sys_lookup_elem)(void *ptr);
91 void (*map_seq_show_elem)(struct bpf_map *map, void *key,
93 int (*map_check_btf)(const struct bpf_map *map,
94 const struct btf *btf,
95 const struct btf_type *key_type,
96 const struct btf_type *value_type);
98 /* Prog poke tracking helpers. */
99 int (*map_poke_track)(struct bpf_map *map, struct bpf_prog_aux *aux);
100 void (*map_poke_untrack)(struct bpf_map *map, struct bpf_prog_aux *aux);
101 void (*map_poke_run)(struct bpf_map *map, u32 key, struct bpf_prog *old,
102 struct bpf_prog *new);
104 /* Direct value access helpers. */
105 int (*map_direct_value_addr)(const struct bpf_map *map,
107 int (*map_direct_value_meta)(const struct bpf_map *map,
109 int (*map_mmap)(struct bpf_map *map, struct vm_area_struct *vma);
110 __poll_t (*map_poll)(struct bpf_map *map, struct file *filp,
111 struct poll_table_struct *pts);
113 /* Functions called by bpf_local_storage maps */
114 int (*map_local_storage_charge)(struct bpf_local_storage_map *smap,
115 void *owner, u32 size);
116 void (*map_local_storage_uncharge)(struct bpf_local_storage_map *smap,
117 void *owner, u32 size);
118 struct bpf_local_storage __rcu ** (*map_owner_storage_ptr)(void *owner);
120 /* map_meta_equal must be implemented for maps that can be
121 * used as an inner map. It is a runtime check to ensure
122 * an inner map can be inserted to an outer map.
124 * Some properties of the inner map has been used during the
125 * verification time. When inserting an inner map at the runtime,
126 * map_meta_equal has to ensure the inserting map has the same
127 * properties that the verifier has used earlier.
129 bool (*map_meta_equal)(const struct bpf_map *meta0,
130 const struct bpf_map *meta1);
132 /* BTF name and id of struct allocated by map_alloc */
133 const char * const map_btf_name;
136 /* bpf_iter info used to open a seq_file */
137 const struct bpf_iter_seq_info *iter_seq_info;
141 /* The first two cachelines with read-mostly members of which some
142 * are also accessed in fast-path (e.g. ops, max_entries).
144 const struct bpf_map_ops *ops ____cacheline_aligned;
145 struct bpf_map *inner_map_meta;
146 #ifdef CONFIG_SECURITY
149 enum bpf_map_type map_type;
154 int spin_lock_off; /* >=0 valid offset, <0 error */
158 u32 btf_value_type_id;
160 #ifdef CONFIG_MEMCG_KMEM
161 struct mem_cgroup *memcg;
163 char name[BPF_OBJ_NAME_LEN];
164 u32 btf_vmlinux_value_type_id;
166 bool frozen; /* write-once; write-protected by freeze_mutex */
169 /* The 3rd and 4th cacheline with misc members to avoid false sharing
170 * particularly with refcounting.
172 atomic64_t refcnt ____cacheline_aligned;
174 struct work_struct work;
175 struct mutex freeze_mutex;
176 u64 writecnt; /* writable mmap cnt; protected by freeze_mutex */
179 static inline bool map_value_has_spin_lock(const struct bpf_map *map)
181 return map->spin_lock_off >= 0;
184 static inline void check_and_init_map_lock(struct bpf_map *map, void *dst)
186 if (likely(!map_value_has_spin_lock(map)))
188 *(struct bpf_spin_lock *)(dst + map->spin_lock_off) =
189 (struct bpf_spin_lock){};
192 /* copy everything but bpf_spin_lock */
193 static inline void copy_map_value(struct bpf_map *map, void *dst, void *src)
195 if (unlikely(map_value_has_spin_lock(map))) {
196 u32 off = map->spin_lock_off;
198 memcpy(dst, src, off);
199 memcpy(dst + off + sizeof(struct bpf_spin_lock),
200 src + off + sizeof(struct bpf_spin_lock),
201 map->value_size - off - sizeof(struct bpf_spin_lock));
203 memcpy(dst, src, map->value_size);
206 void copy_map_value_locked(struct bpf_map *map, void *dst, void *src,
208 int bpf_obj_name_cpy(char *dst, const char *src, unsigned int size);
210 struct bpf_offload_dev;
211 struct bpf_offloaded_map;
213 struct bpf_map_dev_ops {
214 int (*map_get_next_key)(struct bpf_offloaded_map *map,
215 void *key, void *next_key);
216 int (*map_lookup_elem)(struct bpf_offloaded_map *map,
217 void *key, void *value);
218 int (*map_update_elem)(struct bpf_offloaded_map *map,
219 void *key, void *value, u64 flags);
220 int (*map_delete_elem)(struct bpf_offloaded_map *map, void *key);
223 struct bpf_offloaded_map {
225 struct net_device *netdev;
226 const struct bpf_map_dev_ops *dev_ops;
228 struct list_head offloads;
231 static inline struct bpf_offloaded_map *map_to_offmap(struct bpf_map *map)
233 return container_of(map, struct bpf_offloaded_map, map);
236 static inline bool bpf_map_offload_neutral(const struct bpf_map *map)
238 return map->map_type == BPF_MAP_TYPE_PERF_EVENT_ARRAY;
241 static inline bool bpf_map_support_seq_show(const struct bpf_map *map)
243 return (map->btf_value_type_id || map->btf_vmlinux_value_type_id) &&
244 map->ops->map_seq_show_elem;
247 int map_check_no_btf(const struct bpf_map *map,
248 const struct btf *btf,
249 const struct btf_type *key_type,
250 const struct btf_type *value_type);
252 bool bpf_map_meta_equal(const struct bpf_map *meta0,
253 const struct bpf_map *meta1);
255 extern const struct bpf_map_ops bpf_map_offload_ops;
257 /* function argument constraints */
259 ARG_DONTCARE = 0, /* unused argument in helper function */
261 /* the following constraints used to prototype
262 * bpf_map_lookup/update/delete_elem() functions
264 ARG_CONST_MAP_PTR, /* const argument used as pointer to bpf_map */
265 ARG_PTR_TO_MAP_KEY, /* pointer to stack used as map key */
266 ARG_PTR_TO_MAP_VALUE, /* pointer to stack used as map value */
267 ARG_PTR_TO_UNINIT_MAP_VALUE, /* pointer to valid memory used to store a map value */
268 ARG_PTR_TO_MAP_VALUE_OR_NULL, /* pointer to stack used as map value or NULL */
270 /* the following constraints used to prototype bpf_memcmp() and other
271 * functions that access data on eBPF program stack
273 ARG_PTR_TO_MEM, /* pointer to valid memory (stack, packet, map value) */
274 ARG_PTR_TO_MEM_OR_NULL, /* pointer to valid memory or NULL */
275 ARG_PTR_TO_UNINIT_MEM, /* pointer to memory does not need to be initialized,
276 * helper function must fill all bytes or clear
277 * them in error case.
280 ARG_CONST_SIZE, /* number of bytes accessed from memory */
281 ARG_CONST_SIZE_OR_ZERO, /* number of bytes accessed from memory or 0 */
283 ARG_PTR_TO_CTX, /* pointer to context */
284 ARG_PTR_TO_CTX_OR_NULL, /* pointer to context or NULL */
285 ARG_ANYTHING, /* any (initialized) argument is ok */
286 ARG_PTR_TO_SPIN_LOCK, /* pointer to bpf_spin_lock */
287 ARG_PTR_TO_SOCK_COMMON, /* pointer to sock_common */
288 ARG_PTR_TO_INT, /* pointer to int */
289 ARG_PTR_TO_LONG, /* pointer to long */
290 ARG_PTR_TO_SOCKET, /* pointer to bpf_sock (fullsock) */
291 ARG_PTR_TO_SOCKET_OR_NULL, /* pointer to bpf_sock (fullsock) or NULL */
292 ARG_PTR_TO_BTF_ID, /* pointer to in-kernel struct */
293 ARG_PTR_TO_ALLOC_MEM, /* pointer to dynamically allocated memory */
294 ARG_PTR_TO_ALLOC_MEM_OR_NULL, /* pointer to dynamically allocated memory or NULL */
295 ARG_CONST_ALLOC_SIZE_OR_ZERO, /* number of allocated bytes requested */
296 ARG_PTR_TO_BTF_ID_SOCK_COMMON, /* pointer to in-kernel sock_common or bpf-mirrored bpf_sock */
297 ARG_PTR_TO_PERCPU_BTF_ID, /* pointer to in-kernel percpu type */
301 /* type of values returned from helper functions */
302 enum bpf_return_type {
303 RET_INTEGER, /* function returns integer */
304 RET_VOID, /* function doesn't return anything */
305 RET_PTR_TO_MAP_VALUE, /* returns a pointer to map elem value */
306 RET_PTR_TO_MAP_VALUE_OR_NULL, /* returns a pointer to map elem value or NULL */
307 RET_PTR_TO_SOCKET_OR_NULL, /* returns a pointer to a socket or NULL */
308 RET_PTR_TO_TCP_SOCK_OR_NULL, /* returns a pointer to a tcp_sock or NULL */
309 RET_PTR_TO_SOCK_COMMON_OR_NULL, /* returns a pointer to a sock_common or NULL */
310 RET_PTR_TO_ALLOC_MEM_OR_NULL, /* returns a pointer to dynamically allocated memory or NULL */
311 RET_PTR_TO_BTF_ID_OR_NULL, /* returns a pointer to a btf_id or NULL */
312 RET_PTR_TO_MEM_OR_BTF_ID_OR_NULL, /* returns a pointer to a valid memory or a btf_id or NULL */
313 RET_PTR_TO_MEM_OR_BTF_ID, /* returns a pointer to a valid memory or a btf_id */
314 RET_PTR_TO_BTF_ID, /* returns a pointer to a btf_id */
317 /* eBPF function prototype used by verifier to allow BPF_CALLs from eBPF programs
318 * to in-kernel helper functions and for adjusting imm32 field in BPF_CALL
319 * instructions after verifying
321 struct bpf_func_proto {
322 u64 (*func)(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
325 enum bpf_return_type ret_type;
328 enum bpf_arg_type arg1_type;
329 enum bpf_arg_type arg2_type;
330 enum bpf_arg_type arg3_type;
331 enum bpf_arg_type arg4_type;
332 enum bpf_arg_type arg5_type;
334 enum bpf_arg_type arg_type[5];
346 int *ret_btf_id; /* return value btf_id */
347 bool (*allowed)(const struct bpf_prog *prog);
350 /* bpf_context is intentionally undefined structure. Pointer to bpf_context is
351 * the first argument to eBPF programs.
352 * For socket filters: 'struct bpf_context *' == 'struct sk_buff *'
356 enum bpf_access_type {
361 /* types of values stored in eBPF registers */
362 /* Pointer types represent:
365 * pointer + (u16) var
366 * pointer + (u16) var + imm
367 * if (range > 0) then [ptr, ptr + range - off) is safe to access
368 * if (id > 0) means that some 'var' was added
369 * if (off > 0) means that 'imm' was added
372 NOT_INIT = 0, /* nothing was written into register */
373 SCALAR_VALUE, /* reg doesn't contain a valid pointer */
374 PTR_TO_CTX, /* reg points to bpf_context */
375 CONST_PTR_TO_MAP, /* reg points to struct bpf_map */
376 PTR_TO_MAP_VALUE, /* reg points to map element value */
377 PTR_TO_MAP_VALUE_OR_NULL,/* points to map elem value or NULL */
378 PTR_TO_STACK, /* reg == frame_pointer + offset */
379 PTR_TO_PACKET_META, /* skb->data - meta_len */
380 PTR_TO_PACKET, /* reg points to skb->data */
381 PTR_TO_PACKET_END, /* skb->data + headlen */
382 PTR_TO_FLOW_KEYS, /* reg points to bpf_flow_keys */
383 PTR_TO_SOCKET, /* reg points to struct bpf_sock */
384 PTR_TO_SOCKET_OR_NULL, /* reg points to struct bpf_sock or NULL */
385 PTR_TO_SOCK_COMMON, /* reg points to sock_common */
386 PTR_TO_SOCK_COMMON_OR_NULL, /* reg points to sock_common or NULL */
387 PTR_TO_TCP_SOCK, /* reg points to struct tcp_sock */
388 PTR_TO_TCP_SOCK_OR_NULL, /* reg points to struct tcp_sock or NULL */
389 PTR_TO_TP_BUFFER, /* reg points to a writable raw tp's buffer */
390 PTR_TO_XDP_SOCK, /* reg points to struct xdp_sock */
391 /* PTR_TO_BTF_ID points to a kernel struct that does not need
392 * to be null checked by the BPF program. This does not imply the
393 * pointer is _not_ null and in practice this can easily be a null
394 * pointer when reading pointer chains. The assumption is program
395 * context will handle null pointer dereference typically via fault
396 * handling. The verifier must keep this in mind and can make no
397 * assumptions about null or non-null when doing branch analysis.
398 * Further, when passed into helpers the helpers can not, without
399 * additional context, assume the value is non-null.
402 /* PTR_TO_BTF_ID_OR_NULL points to a kernel struct that has not
403 * been checked for null. Used primarily to inform the verifier
404 * an explicit null check is required for this struct.
406 PTR_TO_BTF_ID_OR_NULL,
407 PTR_TO_MEM, /* reg points to valid memory region */
408 PTR_TO_MEM_OR_NULL, /* reg points to valid memory region or NULL */
409 PTR_TO_RDONLY_BUF, /* reg points to a readonly buffer */
410 PTR_TO_RDONLY_BUF_OR_NULL, /* reg points to a readonly buffer or NULL */
411 PTR_TO_RDWR_BUF, /* reg points to a read/write buffer */
412 PTR_TO_RDWR_BUF_OR_NULL, /* reg points to a read/write buffer or NULL */
413 PTR_TO_PERCPU_BTF_ID, /* reg points to a percpu kernel variable */
416 /* The information passed from prog-specific *_is_valid_access
417 * back to the verifier.
419 struct bpf_insn_access_aux {
420 enum bpf_reg_type reg_type;
428 struct bpf_verifier_log *log; /* for verbose logs */
432 bpf_ctx_record_field_size(struct bpf_insn_access_aux *aux, u32 size)
434 aux->ctx_field_size = size;
437 struct bpf_prog_ops {
438 int (*test_run)(struct bpf_prog *prog, const union bpf_attr *kattr,
439 union bpf_attr __user *uattr);
442 struct bpf_verifier_ops {
443 /* return eBPF function prototype for verification */
444 const struct bpf_func_proto *
445 (*get_func_proto)(enum bpf_func_id func_id,
446 const struct bpf_prog *prog);
448 /* return true if 'size' wide access at offset 'off' within bpf_context
449 * with 'type' (read or write) is allowed
451 bool (*is_valid_access)(int off, int size, enum bpf_access_type type,
452 const struct bpf_prog *prog,
453 struct bpf_insn_access_aux *info);
454 int (*gen_prologue)(struct bpf_insn *insn, bool direct_write,
455 const struct bpf_prog *prog);
456 int (*gen_ld_abs)(const struct bpf_insn *orig,
457 struct bpf_insn *insn_buf);
458 u32 (*convert_ctx_access)(enum bpf_access_type type,
459 const struct bpf_insn *src,
460 struct bpf_insn *dst,
461 struct bpf_prog *prog, u32 *target_size);
462 int (*btf_struct_access)(struct bpf_verifier_log *log,
463 const struct btf *btf,
464 const struct btf_type *t, int off, int size,
465 enum bpf_access_type atype,
469 struct bpf_prog_offload_ops {
470 /* verifier basic callbacks */
471 int (*insn_hook)(struct bpf_verifier_env *env,
472 int insn_idx, int prev_insn_idx);
473 int (*finalize)(struct bpf_verifier_env *env);
474 /* verifier optimization callbacks (called after .finalize) */
475 int (*replace_insn)(struct bpf_verifier_env *env, u32 off,
476 struct bpf_insn *insn);
477 int (*remove_insns)(struct bpf_verifier_env *env, u32 off, u32 cnt);
478 /* program management callbacks */
479 int (*prepare)(struct bpf_prog *prog);
480 int (*translate)(struct bpf_prog *prog);
481 void (*destroy)(struct bpf_prog *prog);
484 struct bpf_prog_offload {
485 struct bpf_prog *prog;
486 struct net_device *netdev;
487 struct bpf_offload_dev *offdev;
489 struct list_head offloads;
496 enum bpf_cgroup_storage_type {
497 BPF_CGROUP_STORAGE_SHARED,
498 BPF_CGROUP_STORAGE_PERCPU,
499 __BPF_CGROUP_STORAGE_MAX
502 #define MAX_BPF_CGROUP_STORAGE_TYPE __BPF_CGROUP_STORAGE_MAX
504 /* The longest tracepoint has 12 args.
505 * See include/trace/bpf_probe.h
507 #define MAX_BPF_FUNC_ARGS 12
509 struct btf_func_model {
512 u8 arg_size[MAX_BPF_FUNC_ARGS];
515 /* Restore arguments before returning from trampoline to let original function
516 * continue executing. This flag is used for fentry progs when there are no
519 #define BPF_TRAMP_F_RESTORE_REGS BIT(0)
520 /* Call original function after fentry progs, but before fexit progs.
521 * Makes sense for fentry/fexit, normal calls and indirect calls.
523 #define BPF_TRAMP_F_CALL_ORIG BIT(1)
524 /* Skip current frame and return to parent. Makes sense for fentry/fexit
525 * programs only. Should not be used with normal calls and indirect calls.
527 #define BPF_TRAMP_F_SKIP_FRAME BIT(2)
529 /* Each call __bpf_prog_enter + call bpf_func + call __bpf_prog_exit is ~50
530 * bytes on x86. Pick a number to fit into BPF_IMAGE_SIZE / 2
532 #define BPF_MAX_TRAMP_PROGS 38
534 struct bpf_tramp_progs {
535 struct bpf_prog *progs[BPF_MAX_TRAMP_PROGS];
539 /* Different use cases for BPF trampoline:
540 * 1. replace nop at the function entry (kprobe equivalent)
541 * flags = BPF_TRAMP_F_RESTORE_REGS
542 * fentry = a set of programs to run before returning from trampoline
544 * 2. replace nop at the function entry (kprobe + kretprobe equivalent)
545 * flags = BPF_TRAMP_F_CALL_ORIG | BPF_TRAMP_F_SKIP_FRAME
546 * orig_call = fentry_ip + MCOUNT_INSN_SIZE
547 * fentry = a set of program to run before calling original function
548 * fexit = a set of program to run after original function
550 * 3. replace direct call instruction anywhere in the function body
551 * or assign a function pointer for indirect call (like tcp_congestion_ops->cong_avoid)
553 * fentry = a set of programs to run before returning from trampoline
554 * With flags = BPF_TRAMP_F_CALL_ORIG
555 * orig_call = original callback addr or direct function addr
556 * fentry = a set of program to run before calling original function
557 * fexit = a set of program to run after original function
559 int arch_prepare_bpf_trampoline(void *image, void *image_end,
560 const struct btf_func_model *m, u32 flags,
561 struct bpf_tramp_progs *tprogs,
563 /* these two functions are called from generated trampoline */
564 u64 notrace __bpf_prog_enter(struct bpf_prog *prog);
565 void notrace __bpf_prog_exit(struct bpf_prog *prog, u64 start);
566 u64 notrace __bpf_prog_enter_sleepable(struct bpf_prog *prog);
567 void notrace __bpf_prog_exit_sleepable(struct bpf_prog *prog, u64 start);
572 char name[KSYM_NAME_LEN];
573 struct list_head lnode;
574 struct latch_tree_node tnode;
578 enum bpf_tramp_prog_type {
581 BPF_TRAMP_MODIFY_RETURN,
583 BPF_TRAMP_REPLACE, /* more than MAX */
586 struct bpf_trampoline {
587 /* hlist for trampoline_table */
588 struct hlist_node hlist;
589 /* serializes access to fields of this trampoline */
594 struct btf_func_model model;
598 /* if !NULL this is BPF_PROG_TYPE_EXT program that extends another BPF
599 * program by replacing one of its functions. func.addr is the address
600 * of the function it replaced.
602 struct bpf_prog *extension_prog;
603 /* list of BPF programs using this trampoline */
604 struct hlist_head progs_hlist[BPF_TRAMP_MAX];
605 /* Number of attached programs. A counter per kind. */
606 int progs_cnt[BPF_TRAMP_MAX];
607 /* Executable image of trampoline */
610 struct bpf_ksym ksym;
613 struct bpf_attach_target_info {
614 struct btf_func_model fmodel;
616 const char *tgt_name;
617 const struct btf_type *tgt_type;
620 #define BPF_DISPATCHER_MAX 48 /* Fits in 2048B */
622 struct bpf_dispatcher_prog {
623 struct bpf_prog *prog;
627 struct bpf_dispatcher {
628 /* dispatcher mutex */
631 struct bpf_dispatcher_prog progs[BPF_DISPATCHER_MAX];
635 struct bpf_ksym ksym;
638 static __always_inline unsigned int bpf_dispatcher_nop_func(
640 const struct bpf_insn *insnsi,
641 unsigned int (*bpf_func)(const void *,
642 const struct bpf_insn *))
644 return bpf_func(ctx, insnsi);
646 #ifdef CONFIG_BPF_JIT
647 int bpf_trampoline_link_prog(struct bpf_prog *prog, struct bpf_trampoline *tr);
648 int bpf_trampoline_unlink_prog(struct bpf_prog *prog, struct bpf_trampoline *tr);
649 struct bpf_trampoline *bpf_trampoline_get(u64 key,
650 struct bpf_attach_target_info *tgt_info);
651 void bpf_trampoline_put(struct bpf_trampoline *tr);
652 #define BPF_DISPATCHER_INIT(_name) { \
653 .mutex = __MUTEX_INITIALIZER(_name.mutex), \
654 .func = &_name##_func, \
661 .lnode = LIST_HEAD_INIT(_name.ksym.lnode), \
665 #define DEFINE_BPF_DISPATCHER(name) \
666 noinline unsigned int bpf_dispatcher_##name##_func( \
668 const struct bpf_insn *insnsi, \
669 unsigned int (*bpf_func)(const void *, \
670 const struct bpf_insn *)) \
672 return bpf_func(ctx, insnsi); \
674 EXPORT_SYMBOL(bpf_dispatcher_##name##_func); \
675 struct bpf_dispatcher bpf_dispatcher_##name = \
676 BPF_DISPATCHER_INIT(bpf_dispatcher_##name);
677 #define DECLARE_BPF_DISPATCHER(name) \
678 unsigned int bpf_dispatcher_##name##_func( \
680 const struct bpf_insn *insnsi, \
681 unsigned int (*bpf_func)(const void *, \
682 const struct bpf_insn *)); \
683 extern struct bpf_dispatcher bpf_dispatcher_##name;
684 #define BPF_DISPATCHER_FUNC(name) bpf_dispatcher_##name##_func
685 #define BPF_DISPATCHER_PTR(name) (&bpf_dispatcher_##name)
686 void bpf_dispatcher_change_prog(struct bpf_dispatcher *d, struct bpf_prog *from,
687 struct bpf_prog *to);
688 /* Called only from JIT-enabled code, so there's no need for stubs. */
689 void *bpf_jit_alloc_exec_page(void);
690 void bpf_image_ksym_add(void *data, struct bpf_ksym *ksym);
691 void bpf_image_ksym_del(struct bpf_ksym *ksym);
692 void bpf_ksym_add(struct bpf_ksym *ksym);
693 void bpf_ksym_del(struct bpf_ksym *ksym);
695 static inline int bpf_trampoline_link_prog(struct bpf_prog *prog,
696 struct bpf_trampoline *tr)
700 static inline int bpf_trampoline_unlink_prog(struct bpf_prog *prog,
701 struct bpf_trampoline *tr)
705 static inline struct bpf_trampoline *bpf_trampoline_get(u64 key,
706 struct bpf_attach_target_info *tgt_info)
708 return ERR_PTR(-EOPNOTSUPP);
710 static inline void bpf_trampoline_put(struct bpf_trampoline *tr) {}
711 #define DEFINE_BPF_DISPATCHER(name)
712 #define DECLARE_BPF_DISPATCHER(name)
713 #define BPF_DISPATCHER_FUNC(name) bpf_dispatcher_nop_func
714 #define BPF_DISPATCHER_PTR(name) NULL
715 static inline void bpf_dispatcher_change_prog(struct bpf_dispatcher *d,
716 struct bpf_prog *from,
717 struct bpf_prog *to) {}
718 static inline bool is_bpf_image_address(unsigned long address)
724 struct bpf_func_info_aux {
729 enum bpf_jit_poke_reason {
730 BPF_POKE_REASON_TAIL_CALL,
733 /* Descriptor of pokes pointing /into/ the JITed image. */
734 struct bpf_jit_poke_descriptor {
735 void *tailcall_target;
736 void *tailcall_bypass;
744 bool tailcall_target_stable;
750 /* reg_type info for ctx arguments */
751 struct bpf_ctx_arg_aux {
753 enum bpf_reg_type reg_type;
757 struct btf_mod_pair {
759 struct module *module;
762 struct bpf_prog_aux {
771 u32 func_cnt; /* used by non-func prog as the number of func progs */
772 u32 func_idx; /* 0 for non-func prog, the index in func array for func prog */
773 u32 attach_btf_id; /* in-kernel BTF type id to attach to */
774 u32 ctx_arg_info_size;
775 u32 max_rdonly_access;
777 struct btf *attach_btf;
778 const struct bpf_ctx_arg_aux *ctx_arg_info;
779 struct mutex dst_mutex; /* protects dst_* pointers below, *after* prog becomes visible */
780 struct bpf_prog *dst_prog;
781 struct bpf_trampoline *dst_trampoline;
782 enum bpf_prog_type saved_dst_prog_type;
783 enum bpf_attach_type saved_dst_attach_type;
784 bool verifier_zext; /* Zero extensions has been inserted by verifier. */
785 bool offload_requested;
786 bool attach_btf_trace; /* true if attaching to BTF-enabled raw tp */
787 bool func_proto_unreliable;
789 bool tail_call_reachable;
790 enum bpf_tramp_prog_type trampoline_prog_type;
791 struct hlist_node tramp_hlist;
792 /* BTF_KIND_FUNC_PROTO for valid attach_btf_id */
793 const struct btf_type *attach_func_proto;
794 /* function name for valid attach_btf_id */
795 const char *attach_func_name;
796 struct bpf_prog **func;
797 void *jit_data; /* JIT specific data. arch dependent */
798 struct bpf_jit_poke_descriptor *poke_tab;
800 struct bpf_ksym ksym;
801 const struct bpf_prog_ops *ops;
802 struct bpf_map **used_maps;
803 struct mutex used_maps_mutex; /* mutex for used_maps and used_map_cnt */
804 struct btf_mod_pair *used_btfs;
805 struct bpf_prog *prog;
806 struct user_struct *user;
807 u64 load_time; /* ns since boottime */
808 struct bpf_map *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE];
809 char name[BPF_OBJ_NAME_LEN];
810 #ifdef CONFIG_SECURITY
813 struct bpf_prog_offload *offload;
815 struct bpf_func_info *func_info;
816 struct bpf_func_info_aux *func_info_aux;
817 /* bpf_line_info loaded from userspace. linfo->insn_off
818 * has the xlated insn offset.
819 * Both the main and sub prog share the same linfo.
820 * The subprog can access its first linfo by
821 * using the linfo_idx.
823 struct bpf_line_info *linfo;
824 /* jited_linfo is the jited addr of the linfo. It has a
825 * one to one mapping to linfo:
826 * jited_linfo[i] is the jited addr for the linfo[i]->insn_off.
827 * Both the main and sub prog share the same jited_linfo.
828 * The subprog can access its first jited_linfo by
829 * using the linfo_idx.
834 /* subprog can use linfo_idx to access its first linfo and
836 * main prog always has linfo_idx == 0
840 struct exception_table_entry *extable;
842 struct work_struct work;
847 struct bpf_array_aux {
848 /* 'Ownership' of prog array is claimed by the first program that
849 * is going to use this map or by the first program which FD is
850 * stored in the map to make sure that all callers and callees have
851 * the same prog type and JITed flag.
853 enum bpf_prog_type type;
855 /* Programs with direct jumps into programs part of this array. */
856 struct list_head poke_progs;
858 struct mutex poke_mutex;
859 struct work_struct work;
865 enum bpf_link_type type;
866 const struct bpf_link_ops *ops;
867 struct bpf_prog *prog;
868 struct work_struct work;
871 struct bpf_link_ops {
872 void (*release)(struct bpf_link *link);
873 void (*dealloc)(struct bpf_link *link);
874 int (*detach)(struct bpf_link *link);
875 int (*update_prog)(struct bpf_link *link, struct bpf_prog *new_prog,
876 struct bpf_prog *old_prog);
877 void (*show_fdinfo)(const struct bpf_link *link, struct seq_file *seq);
878 int (*fill_link_info)(const struct bpf_link *link,
879 struct bpf_link_info *info);
882 struct bpf_link_primer {
883 struct bpf_link *link;
889 struct bpf_struct_ops_value;
893 #define BPF_STRUCT_OPS_MAX_NR_MEMBERS 64
894 struct bpf_struct_ops {
895 const struct bpf_verifier_ops *verifier_ops;
896 int (*init)(struct btf *btf);
897 int (*check_member)(const struct btf_type *t,
898 const struct btf_member *member);
899 int (*init_member)(const struct btf_type *t,
900 const struct btf_member *member,
901 void *kdata, const void *udata);
902 int (*reg)(void *kdata);
903 void (*unreg)(void *kdata);
904 const struct btf_type *type;
905 const struct btf_type *value_type;
907 struct btf_func_model func_models[BPF_STRUCT_OPS_MAX_NR_MEMBERS];
912 #if defined(CONFIG_BPF_JIT) && defined(CONFIG_BPF_SYSCALL)
913 #define BPF_MODULE_OWNER ((void *)((0xeB9FUL << 2) + POISON_POINTER_DELTA))
914 const struct bpf_struct_ops *bpf_struct_ops_find(u32 type_id);
915 void bpf_struct_ops_init(struct btf *btf, struct bpf_verifier_log *log);
916 bool bpf_struct_ops_get(const void *kdata);
917 void bpf_struct_ops_put(const void *kdata);
918 int bpf_struct_ops_map_sys_lookup_elem(struct bpf_map *map, void *key,
920 static inline bool bpf_try_module_get(const void *data, struct module *owner)
922 if (owner == BPF_MODULE_OWNER)
923 return bpf_struct_ops_get(data);
925 return try_module_get(owner);
927 static inline void bpf_module_put(const void *data, struct module *owner)
929 if (owner == BPF_MODULE_OWNER)
930 bpf_struct_ops_put(data);
935 static inline const struct bpf_struct_ops *bpf_struct_ops_find(u32 type_id)
939 static inline void bpf_struct_ops_init(struct btf *btf,
940 struct bpf_verifier_log *log)
943 static inline bool bpf_try_module_get(const void *data, struct module *owner)
945 return try_module_get(owner);
947 static inline void bpf_module_put(const void *data, struct module *owner)
951 static inline int bpf_struct_ops_map_sys_lookup_elem(struct bpf_map *map,
963 struct bpf_array_aux *aux;
965 char value[0] __aligned(8);
966 void *ptrs[0] __aligned(8);
967 void __percpu *pptrs[0] __aligned(8);
971 #define BPF_COMPLEXITY_LIMIT_INSNS 1000000 /* yes. 1M insns */
972 #define MAX_TAIL_CALL_CNT 32
974 #define BPF_F_ACCESS_MASK (BPF_F_RDONLY | \
975 BPF_F_RDONLY_PROG | \
979 #define BPF_MAP_CAN_READ BIT(0)
980 #define BPF_MAP_CAN_WRITE BIT(1)
982 static inline u32 bpf_map_flags_to_cap(struct bpf_map *map)
984 u32 access_flags = map->map_flags & (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG);
986 /* Combination of BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG is
989 if (access_flags & BPF_F_RDONLY_PROG)
990 return BPF_MAP_CAN_READ;
991 else if (access_flags & BPF_F_WRONLY_PROG)
992 return BPF_MAP_CAN_WRITE;
994 return BPF_MAP_CAN_READ | BPF_MAP_CAN_WRITE;
997 static inline bool bpf_map_flags_access_ok(u32 access_flags)
999 return (access_flags & (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG)) !=
1000 (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG);
1003 struct bpf_event_entry {
1004 struct perf_event *event;
1005 struct file *perf_file;
1006 struct file *map_file;
1007 struct rcu_head rcu;
1010 bool bpf_prog_array_compatible(struct bpf_array *array, const struct bpf_prog *fp);
1011 int bpf_prog_calc_tag(struct bpf_prog *fp);
1013 const struct bpf_func_proto *bpf_get_trace_printk_proto(void);
1015 typedef unsigned long (*bpf_ctx_copy_t)(void *dst, const void *src,
1016 unsigned long off, unsigned long len);
1017 typedef u32 (*bpf_convert_ctx_access_t)(enum bpf_access_type type,
1018 const struct bpf_insn *src,
1019 struct bpf_insn *dst,
1020 struct bpf_prog *prog,
1023 u64 bpf_event_output(struct bpf_map *map, u64 flags, void *meta, u64 meta_size,
1024 void *ctx, u64 ctx_size, bpf_ctx_copy_t ctx_copy);
1026 /* an array of programs to be executed under rcu_lock.
1029 * ret = BPF_PROG_RUN_ARRAY(&bpf_prog_array, ctx, BPF_PROG_RUN);
1031 * the structure returned by bpf_prog_array_alloc() should be populated
1032 * with program pointers and the last pointer must be NULL.
1033 * The user has to keep refcnt on the program and make sure the program
1034 * is removed from the array before bpf_prog_put().
1035 * The 'struct bpf_prog_array *' should only be replaced with xchg()
1036 * since other cpus are walking the array of pointers in parallel.
1038 struct bpf_prog_array_item {
1039 struct bpf_prog *prog;
1040 struct bpf_cgroup_storage *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE];
1043 struct bpf_prog_array {
1044 struct rcu_head rcu;
1045 struct bpf_prog_array_item items[];
1048 struct bpf_prog_array *bpf_prog_array_alloc(u32 prog_cnt, gfp_t flags);
1049 void bpf_prog_array_free(struct bpf_prog_array *progs);
1050 int bpf_prog_array_length(struct bpf_prog_array *progs);
1051 bool bpf_prog_array_is_empty(struct bpf_prog_array *array);
1052 int bpf_prog_array_copy_to_user(struct bpf_prog_array *progs,
1053 __u32 __user *prog_ids, u32 cnt);
1055 void bpf_prog_array_delete_safe(struct bpf_prog_array *progs,
1056 struct bpf_prog *old_prog);
1057 int bpf_prog_array_delete_safe_at(struct bpf_prog_array *array, int index);
1058 int bpf_prog_array_update_at(struct bpf_prog_array *array, int index,
1059 struct bpf_prog *prog);
1060 int bpf_prog_array_copy_info(struct bpf_prog_array *array,
1061 u32 *prog_ids, u32 request_cnt,
1063 int bpf_prog_array_copy(struct bpf_prog_array *old_array,
1064 struct bpf_prog *exclude_prog,
1065 struct bpf_prog *include_prog,
1066 struct bpf_prog_array **new_array);
1068 /* BPF program asks to bypass CAP_NET_BIND_SERVICE in bind. */
1069 #define BPF_RET_BIND_NO_CAP_NET_BIND_SERVICE (1 << 0)
1070 /* BPF program asks to set CN on the packet. */
1071 #define BPF_RET_SET_CN (1 << 0)
1073 #define BPF_PROG_RUN_ARRAY_FLAGS(array, ctx, func, ret_flags) \
1075 struct bpf_prog_array_item *_item; \
1076 struct bpf_prog *_prog; \
1077 struct bpf_prog_array *_array; \
1080 migrate_disable(); \
1082 _array = rcu_dereference(array); \
1083 _item = &_array->items[0]; \
1084 while ((_prog = READ_ONCE(_item->prog))) { \
1085 bpf_cgroup_storage_set(_item->cgroup_storage); \
1086 func_ret = func(_prog, ctx); \
1087 _ret &= (func_ret & 1); \
1088 *(ret_flags) |= (func_ret >> 1); \
1091 rcu_read_unlock(); \
1096 #define __BPF_PROG_RUN_ARRAY(array, ctx, func, check_non_null) \
1098 struct bpf_prog_array_item *_item; \
1099 struct bpf_prog *_prog; \
1100 struct bpf_prog_array *_array; \
1102 migrate_disable(); \
1104 _array = rcu_dereference(array); \
1105 if (unlikely(check_non_null && !_array))\
1107 _item = &_array->items[0]; \
1108 while ((_prog = READ_ONCE(_item->prog))) { \
1109 bpf_cgroup_storage_set(_item->cgroup_storage); \
1110 _ret &= func(_prog, ctx); \
1114 rcu_read_unlock(); \
1119 /* To be used by __cgroup_bpf_run_filter_skb for EGRESS BPF progs
1120 * so BPF programs can request cwr for TCP packets.
1122 * Current cgroup skb programs can only return 0 or 1 (0 to drop the
1123 * packet. This macro changes the behavior so the low order bit
1124 * indicates whether the packet should be dropped (0) or not (1)
1125 * and the next bit is a congestion notification bit. This could be
1126 * used by TCP to call tcp_enter_cwr()
1128 * Hence, new allowed return values of CGROUP EGRESS BPF programs are:
1131 * 2: drop packet and cn
1132 * 3: keep packet and cn
1134 * This macro then converts it to one of the NET_XMIT or an error
1135 * code that is then interpreted as drop packet (and no cn):
1136 * 0: NET_XMIT_SUCCESS skb should be transmitted
1137 * 1: NET_XMIT_DROP skb should be dropped and cn
1138 * 2: NET_XMIT_CN skb should be transmitted and cn
1139 * 3: -EPERM skb should be dropped
1141 #define BPF_PROG_CGROUP_INET_EGRESS_RUN_ARRAY(array, ctx, func) \
1146 _ret = BPF_PROG_RUN_ARRAY_FLAGS(array, ctx, func, &_flags); \
1147 _cn = _flags & BPF_RET_SET_CN; \
1149 _ret = (_cn ? NET_XMIT_CN : NET_XMIT_SUCCESS); \
1151 _ret = (_cn ? NET_XMIT_DROP : -EPERM); \
1155 #define BPF_PROG_RUN_ARRAY(array, ctx, func) \
1156 __BPF_PROG_RUN_ARRAY(array, ctx, func, false)
1158 #define BPF_PROG_RUN_ARRAY_CHECK(array, ctx, func) \
1159 __BPF_PROG_RUN_ARRAY(array, ctx, func, true)
1161 #ifdef CONFIG_BPF_SYSCALL
1162 DECLARE_PER_CPU(int, bpf_prog_active);
1163 extern struct mutex bpf_stats_enabled_mutex;
1166 * Block execution of BPF programs attached to instrumentation (perf,
1167 * kprobes, tracepoints) to prevent deadlocks on map operations as any of
1168 * these events can happen inside a region which holds a map bucket lock
1169 * and can deadlock on it.
1171 * Use the preemption safe inc/dec variants on RT because migrate disable
1172 * is preemptible on RT and preemption in the middle of the RMW operation
1173 * might lead to inconsistent state. Use the raw variants for non RT
1174 * kernels as migrate_disable() maps to preempt_disable() so the slightly
1175 * more expensive save operation can be avoided.
1177 static inline void bpf_disable_instrumentation(void)
1180 if (IS_ENABLED(CONFIG_PREEMPT_RT))
1181 this_cpu_inc(bpf_prog_active);
1183 __this_cpu_inc(bpf_prog_active);
1186 static inline void bpf_enable_instrumentation(void)
1188 if (IS_ENABLED(CONFIG_PREEMPT_RT))
1189 this_cpu_dec(bpf_prog_active);
1191 __this_cpu_dec(bpf_prog_active);
1195 extern const struct file_operations bpf_map_fops;
1196 extern const struct file_operations bpf_prog_fops;
1197 extern const struct file_operations bpf_iter_fops;
1199 #define BPF_PROG_TYPE(_id, _name, prog_ctx_type, kern_ctx_type) \
1200 extern const struct bpf_prog_ops _name ## _prog_ops; \
1201 extern const struct bpf_verifier_ops _name ## _verifier_ops;
1202 #define BPF_MAP_TYPE(_id, _ops) \
1203 extern const struct bpf_map_ops _ops;
1204 #define BPF_LINK_TYPE(_id, _name)
1205 #include <linux/bpf_types.h>
1206 #undef BPF_PROG_TYPE
1208 #undef BPF_LINK_TYPE
1210 extern const struct bpf_prog_ops bpf_offload_prog_ops;
1211 extern const struct bpf_verifier_ops tc_cls_act_analyzer_ops;
1212 extern const struct bpf_verifier_ops xdp_analyzer_ops;
1214 struct bpf_prog *bpf_prog_get(u32 ufd);
1215 struct bpf_prog *bpf_prog_get_type_dev(u32 ufd, enum bpf_prog_type type,
1217 void bpf_prog_add(struct bpf_prog *prog, int i);
1218 void bpf_prog_sub(struct bpf_prog *prog, int i);
1219 void bpf_prog_inc(struct bpf_prog *prog);
1220 struct bpf_prog * __must_check bpf_prog_inc_not_zero(struct bpf_prog *prog);
1221 void bpf_prog_put(struct bpf_prog *prog);
1223 void bpf_prog_free_id(struct bpf_prog *prog, bool do_idr_lock);
1224 void bpf_map_free_id(struct bpf_map *map, bool do_idr_lock);
1226 struct bpf_map *bpf_map_get(u32 ufd);
1227 struct bpf_map *bpf_map_get_with_uref(u32 ufd);
1228 struct bpf_map *__bpf_map_get(struct fd f);
1229 void bpf_map_inc(struct bpf_map *map);
1230 void bpf_map_inc_with_uref(struct bpf_map *map);
1231 struct bpf_map * __must_check bpf_map_inc_not_zero(struct bpf_map *map);
1232 void bpf_map_put_with_uref(struct bpf_map *map);
1233 void bpf_map_put(struct bpf_map *map);
1234 void *bpf_map_area_alloc(u64 size, int numa_node);
1235 void *bpf_map_area_mmapable_alloc(u64 size, int numa_node);
1236 void bpf_map_area_free(void *base);
1237 void bpf_map_init_from_attr(struct bpf_map *map, union bpf_attr *attr);
1238 int generic_map_lookup_batch(struct bpf_map *map,
1239 const union bpf_attr *attr,
1240 union bpf_attr __user *uattr);
1241 int generic_map_update_batch(struct bpf_map *map,
1242 const union bpf_attr *attr,
1243 union bpf_attr __user *uattr);
1244 int generic_map_delete_batch(struct bpf_map *map,
1245 const union bpf_attr *attr,
1246 union bpf_attr __user *uattr);
1247 struct bpf_map *bpf_map_get_curr_or_next(u32 *id);
1248 struct bpf_prog *bpf_prog_get_curr_or_next(u32 *id);
1250 #ifdef CONFIG_MEMCG_KMEM
1251 void *bpf_map_kmalloc_node(const struct bpf_map *map, size_t size, gfp_t flags,
1253 void *bpf_map_kzalloc(const struct bpf_map *map, size_t size, gfp_t flags);
1254 void __percpu *bpf_map_alloc_percpu(const struct bpf_map *map, size_t size,
1255 size_t align, gfp_t flags);
1257 static inline void *
1258 bpf_map_kmalloc_node(const struct bpf_map *map, size_t size, gfp_t flags,
1261 return kmalloc_node(size, flags, node);
1264 static inline void *
1265 bpf_map_kzalloc(const struct bpf_map *map, size_t size, gfp_t flags)
1267 return kzalloc(size, flags);
1270 static inline void __percpu *
1271 bpf_map_alloc_percpu(const struct bpf_map *map, size_t size, size_t align,
1274 return __alloc_percpu_gfp(size, align, flags);
1278 extern int sysctl_unprivileged_bpf_disabled;
1280 static inline bool bpf_allow_ptr_leaks(void)
1282 return perfmon_capable();
1285 static inline bool bpf_allow_uninit_stack(void)
1287 return perfmon_capable();
1290 static inline bool bpf_allow_ptr_to_map_access(void)
1292 return perfmon_capable();
1295 static inline bool bpf_bypass_spec_v1(void)
1297 return perfmon_capable();
1300 static inline bool bpf_bypass_spec_v4(void)
1302 return perfmon_capable();
1305 int bpf_map_new_fd(struct bpf_map *map, int flags);
1306 int bpf_prog_new_fd(struct bpf_prog *prog);
1308 void bpf_link_init(struct bpf_link *link, enum bpf_link_type type,
1309 const struct bpf_link_ops *ops, struct bpf_prog *prog);
1310 int bpf_link_prime(struct bpf_link *link, struct bpf_link_primer *primer);
1311 int bpf_link_settle(struct bpf_link_primer *primer);
1312 void bpf_link_cleanup(struct bpf_link_primer *primer);
1313 void bpf_link_inc(struct bpf_link *link);
1314 void bpf_link_put(struct bpf_link *link);
1315 int bpf_link_new_fd(struct bpf_link *link);
1316 struct file *bpf_link_new_file(struct bpf_link *link, int *reserved_fd);
1317 struct bpf_link *bpf_link_get_from_fd(u32 ufd);
1319 int bpf_obj_pin_user(u32 ufd, const char __user *pathname);
1320 int bpf_obj_get_user(const char __user *pathname, int flags);
1322 #define BPF_ITER_FUNC_PREFIX "bpf_iter_"
1323 #define DEFINE_BPF_ITER_FUNC(target, args...) \
1324 extern int bpf_iter_ ## target(args); \
1325 int __init bpf_iter_ ## target(args) { return 0; }
1327 struct bpf_iter_aux_info {
1328 struct bpf_map *map;
1331 typedef int (*bpf_iter_attach_target_t)(struct bpf_prog *prog,
1332 union bpf_iter_link_info *linfo,
1333 struct bpf_iter_aux_info *aux);
1334 typedef void (*bpf_iter_detach_target_t)(struct bpf_iter_aux_info *aux);
1335 typedef void (*bpf_iter_show_fdinfo_t) (const struct bpf_iter_aux_info *aux,
1336 struct seq_file *seq);
1337 typedef int (*bpf_iter_fill_link_info_t)(const struct bpf_iter_aux_info *aux,
1338 struct bpf_link_info *info);
1340 enum bpf_iter_feature {
1341 BPF_ITER_RESCHED = BIT(0),
1344 #define BPF_ITER_CTX_ARG_MAX 2
1345 struct bpf_iter_reg {
1347 bpf_iter_attach_target_t attach_target;
1348 bpf_iter_detach_target_t detach_target;
1349 bpf_iter_show_fdinfo_t show_fdinfo;
1350 bpf_iter_fill_link_info_t fill_link_info;
1351 u32 ctx_arg_info_size;
1353 struct bpf_ctx_arg_aux ctx_arg_info[BPF_ITER_CTX_ARG_MAX];
1354 const struct bpf_iter_seq_info *seq_info;
1357 struct bpf_iter_meta {
1358 __bpf_md_ptr(struct seq_file *, seq);
1363 struct bpf_iter__bpf_map_elem {
1364 __bpf_md_ptr(struct bpf_iter_meta *, meta);
1365 __bpf_md_ptr(struct bpf_map *, map);
1366 __bpf_md_ptr(void *, key);
1367 __bpf_md_ptr(void *, value);
1370 int bpf_iter_reg_target(const struct bpf_iter_reg *reg_info);
1371 void bpf_iter_unreg_target(const struct bpf_iter_reg *reg_info);
1372 bool bpf_iter_prog_supported(struct bpf_prog *prog);
1373 int bpf_iter_link_attach(const union bpf_attr *attr, struct bpf_prog *prog);
1374 int bpf_iter_new_fd(struct bpf_link *link);
1375 bool bpf_link_is_iter(struct bpf_link *link);
1376 struct bpf_prog *bpf_iter_get_info(struct bpf_iter_meta *meta, bool in_stop);
1377 int bpf_iter_run_prog(struct bpf_prog *prog, void *ctx);
1378 void bpf_iter_map_show_fdinfo(const struct bpf_iter_aux_info *aux,
1379 struct seq_file *seq);
1380 int bpf_iter_map_fill_link_info(const struct bpf_iter_aux_info *aux,
1381 struct bpf_link_info *info);
1383 int bpf_percpu_hash_copy(struct bpf_map *map, void *key, void *value);
1384 int bpf_percpu_array_copy(struct bpf_map *map, void *key, void *value);
1385 int bpf_percpu_hash_update(struct bpf_map *map, void *key, void *value,
1387 int bpf_percpu_array_update(struct bpf_map *map, void *key, void *value,
1390 int bpf_stackmap_copy(struct bpf_map *map, void *key, void *value);
1392 int bpf_fd_array_map_update_elem(struct bpf_map *map, struct file *map_file,
1393 void *key, void *value, u64 map_flags);
1394 int bpf_fd_array_map_lookup_elem(struct bpf_map *map, void *key, u32 *value);
1395 int bpf_fd_htab_map_update_elem(struct bpf_map *map, struct file *map_file,
1396 void *key, void *value, u64 map_flags);
1397 int bpf_fd_htab_map_lookup_elem(struct bpf_map *map, void *key, u32 *value);
1399 int bpf_get_file_flag(int flags);
1400 int bpf_check_uarg_tail_zero(void __user *uaddr, size_t expected_size,
1401 size_t actual_size);
1403 /* memcpy that is used with 8-byte aligned pointers, power-of-8 size and
1404 * forced to use 'long' read/writes to try to atomically copy long counters.
1405 * Best-effort only. No barriers here, since it _will_ race with concurrent
1406 * updates from BPF programs. Called from bpf syscall and mostly used with
1407 * size 8 or 16 bytes, so ask compiler to inline it.
1409 static inline void bpf_long_memcpy(void *dst, const void *src, u32 size)
1411 const long *lsrc = src;
1414 size /= sizeof(long);
1419 /* verify correctness of eBPF program */
1420 int bpf_check(struct bpf_prog **fp, union bpf_attr *attr,
1421 union bpf_attr __user *uattr);
1423 #ifndef CONFIG_BPF_JIT_ALWAYS_ON
1424 void bpf_patch_call_args(struct bpf_insn *insn, u32 stack_depth);
1427 struct btf *bpf_get_btf_vmlinux(void);
1433 struct bpf_dtab_netdev *__dev_map_lookup_elem(struct bpf_map *map, u32 key);
1434 struct bpf_dtab_netdev *__dev_map_hash_lookup_elem(struct bpf_map *map, u32 key);
1435 void __dev_flush(void);
1436 int dev_xdp_enqueue(struct net_device *dev, struct xdp_buff *xdp,
1437 struct net_device *dev_rx);
1438 int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp,
1439 struct net_device *dev_rx);
1440 int dev_map_generic_redirect(struct bpf_dtab_netdev *dst, struct sk_buff *skb,
1441 struct bpf_prog *xdp_prog);
1442 bool dev_map_can_have_prog(struct bpf_map *map);
1444 struct bpf_cpu_map_entry *__cpu_map_lookup_elem(struct bpf_map *map, u32 key);
1445 void __cpu_map_flush(void);
1446 int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu, struct xdp_buff *xdp,
1447 struct net_device *dev_rx);
1448 bool cpu_map_prog_allowed(struct bpf_map *map);
1450 /* Return map's numa specified by userspace */
1451 static inline int bpf_map_attr_numa_node(const union bpf_attr *attr)
1453 return (attr->map_flags & BPF_F_NUMA_NODE) ?
1454 attr->numa_node : NUMA_NO_NODE;
1457 struct bpf_prog *bpf_prog_get_type_path(const char *name, enum bpf_prog_type type);
1458 int array_map_alloc_check(union bpf_attr *attr);
1460 int bpf_prog_test_run_xdp(struct bpf_prog *prog, const union bpf_attr *kattr,
1461 union bpf_attr __user *uattr);
1462 int bpf_prog_test_run_skb(struct bpf_prog *prog, const union bpf_attr *kattr,
1463 union bpf_attr __user *uattr);
1464 int bpf_prog_test_run_tracing(struct bpf_prog *prog,
1465 const union bpf_attr *kattr,
1466 union bpf_attr __user *uattr);
1467 int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog,
1468 const union bpf_attr *kattr,
1469 union bpf_attr __user *uattr);
1470 int bpf_prog_test_run_raw_tp(struct bpf_prog *prog,
1471 const union bpf_attr *kattr,
1472 union bpf_attr __user *uattr);
1473 bool btf_ctx_access(int off, int size, enum bpf_access_type type,
1474 const struct bpf_prog *prog,
1475 struct bpf_insn_access_aux *info);
1476 int btf_struct_access(struct bpf_verifier_log *log, const struct btf *btf,
1477 const struct btf_type *t, int off, int size,
1478 enum bpf_access_type atype,
1480 bool btf_struct_ids_match(struct bpf_verifier_log *log,
1481 const struct btf *btf, u32 id, int off,
1482 const struct btf *need_btf, u32 need_type_id);
1484 int btf_distill_func_proto(struct bpf_verifier_log *log,
1486 const struct btf_type *func_proto,
1487 const char *func_name,
1488 struct btf_func_model *m);
1490 struct bpf_reg_state;
1491 int btf_check_func_arg_match(struct bpf_verifier_env *env, int subprog,
1492 struct bpf_reg_state *regs);
1493 int btf_prepare_func_args(struct bpf_verifier_env *env, int subprog,
1494 struct bpf_reg_state *reg);
1495 int btf_check_type_match(struct bpf_verifier_log *log, const struct bpf_prog *prog,
1496 struct btf *btf, const struct btf_type *t);
1498 struct bpf_prog *bpf_prog_by_id(u32 id);
1499 struct bpf_link *bpf_link_by_id(u32 id);
1501 const struct bpf_func_proto *bpf_base_func_proto(enum bpf_func_id func_id);
1502 #else /* !CONFIG_BPF_SYSCALL */
1503 static inline struct bpf_prog *bpf_prog_get(u32 ufd)
1505 return ERR_PTR(-EOPNOTSUPP);
1508 static inline struct bpf_prog *bpf_prog_get_type_dev(u32 ufd,
1509 enum bpf_prog_type type,
1512 return ERR_PTR(-EOPNOTSUPP);
1515 static inline void bpf_prog_add(struct bpf_prog *prog, int i)
1519 static inline void bpf_prog_sub(struct bpf_prog *prog, int i)
1523 static inline void bpf_prog_put(struct bpf_prog *prog)
1527 static inline void bpf_prog_inc(struct bpf_prog *prog)
1531 static inline struct bpf_prog *__must_check
1532 bpf_prog_inc_not_zero(struct bpf_prog *prog)
1534 return ERR_PTR(-EOPNOTSUPP);
1537 static inline void bpf_link_init(struct bpf_link *link, enum bpf_link_type type,
1538 const struct bpf_link_ops *ops,
1539 struct bpf_prog *prog)
1543 static inline int bpf_link_prime(struct bpf_link *link,
1544 struct bpf_link_primer *primer)
1549 static inline int bpf_link_settle(struct bpf_link_primer *primer)
1554 static inline void bpf_link_cleanup(struct bpf_link_primer *primer)
1558 static inline void bpf_link_inc(struct bpf_link *link)
1562 static inline void bpf_link_put(struct bpf_link *link)
1566 static inline int bpf_obj_get_user(const char __user *pathname, int flags)
1571 static inline struct net_device *__dev_map_lookup_elem(struct bpf_map *map,
1577 static inline struct net_device *__dev_map_hash_lookup_elem(struct bpf_map *map,
1582 static inline bool dev_map_can_have_prog(struct bpf_map *map)
1587 static inline void __dev_flush(void)
1592 struct bpf_dtab_netdev;
1595 int dev_xdp_enqueue(struct net_device *dev, struct xdp_buff *xdp,
1596 struct net_device *dev_rx)
1602 int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp,
1603 struct net_device *dev_rx)
1610 static inline int dev_map_generic_redirect(struct bpf_dtab_netdev *dst,
1611 struct sk_buff *skb,
1612 struct bpf_prog *xdp_prog)
1618 struct bpf_cpu_map_entry *__cpu_map_lookup_elem(struct bpf_map *map, u32 key)
1623 static inline void __cpu_map_flush(void)
1627 static inline int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu,
1628 struct xdp_buff *xdp,
1629 struct net_device *dev_rx)
1634 static inline bool cpu_map_prog_allowed(struct bpf_map *map)
1639 static inline struct bpf_prog *bpf_prog_get_type_path(const char *name,
1640 enum bpf_prog_type type)
1642 return ERR_PTR(-EOPNOTSUPP);
1645 static inline int bpf_prog_test_run_xdp(struct bpf_prog *prog,
1646 const union bpf_attr *kattr,
1647 union bpf_attr __user *uattr)
1652 static inline int bpf_prog_test_run_skb(struct bpf_prog *prog,
1653 const union bpf_attr *kattr,
1654 union bpf_attr __user *uattr)
1659 static inline int bpf_prog_test_run_tracing(struct bpf_prog *prog,
1660 const union bpf_attr *kattr,
1661 union bpf_attr __user *uattr)
1666 static inline int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog,
1667 const union bpf_attr *kattr,
1668 union bpf_attr __user *uattr)
1673 static inline void bpf_map_put(struct bpf_map *map)
1677 static inline struct bpf_prog *bpf_prog_by_id(u32 id)
1679 return ERR_PTR(-ENOTSUPP);
1682 static inline const struct bpf_func_proto *
1683 bpf_base_func_proto(enum bpf_func_id func_id)
1687 #endif /* CONFIG_BPF_SYSCALL */
1689 void __bpf_free_used_btfs(struct bpf_prog_aux *aux,
1690 struct btf_mod_pair *used_btfs, u32 len);
1692 static inline struct bpf_prog *bpf_prog_get_type(u32 ufd,
1693 enum bpf_prog_type type)
1695 return bpf_prog_get_type_dev(ufd, type, false);
1698 void __bpf_free_used_maps(struct bpf_prog_aux *aux,
1699 struct bpf_map **used_maps, u32 len);
1701 bool bpf_prog_get_ok(struct bpf_prog *, enum bpf_prog_type *, bool);
1703 int bpf_prog_offload_compile(struct bpf_prog *prog);
1704 void bpf_prog_offload_destroy(struct bpf_prog *prog);
1705 int bpf_prog_offload_info_fill(struct bpf_prog_info *info,
1706 struct bpf_prog *prog);
1708 int bpf_map_offload_info_fill(struct bpf_map_info *info, struct bpf_map *map);
1710 int bpf_map_offload_lookup_elem(struct bpf_map *map, void *key, void *value);
1711 int bpf_map_offload_update_elem(struct bpf_map *map,
1712 void *key, void *value, u64 flags);
1713 int bpf_map_offload_delete_elem(struct bpf_map *map, void *key);
1714 int bpf_map_offload_get_next_key(struct bpf_map *map,
1715 void *key, void *next_key);
1717 bool bpf_offload_prog_map_match(struct bpf_prog *prog, struct bpf_map *map);
1719 struct bpf_offload_dev *
1720 bpf_offload_dev_create(const struct bpf_prog_offload_ops *ops, void *priv);
1721 void bpf_offload_dev_destroy(struct bpf_offload_dev *offdev);
1722 void *bpf_offload_dev_priv(struct bpf_offload_dev *offdev);
1723 int bpf_offload_dev_netdev_register(struct bpf_offload_dev *offdev,
1724 struct net_device *netdev);
1725 void bpf_offload_dev_netdev_unregister(struct bpf_offload_dev *offdev,
1726 struct net_device *netdev);
1727 bool bpf_offload_dev_match(struct bpf_prog *prog, struct net_device *netdev);
1729 #if defined(CONFIG_NET) && defined(CONFIG_BPF_SYSCALL)
1730 int bpf_prog_offload_init(struct bpf_prog *prog, union bpf_attr *attr);
1732 static inline bool bpf_prog_is_dev_bound(const struct bpf_prog_aux *aux)
1734 return aux->offload_requested;
1737 static inline bool bpf_map_is_dev_bound(struct bpf_map *map)
1739 return unlikely(map->ops == &bpf_map_offload_ops);
1742 struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr);
1743 void bpf_map_offload_map_free(struct bpf_map *map);
1745 static inline int bpf_prog_offload_init(struct bpf_prog *prog,
1746 union bpf_attr *attr)
1751 static inline bool bpf_prog_is_dev_bound(struct bpf_prog_aux *aux)
1756 static inline bool bpf_map_is_dev_bound(struct bpf_map *map)
1761 static inline struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr)
1763 return ERR_PTR(-EOPNOTSUPP);
1766 static inline void bpf_map_offload_map_free(struct bpf_map *map)
1769 #endif /* CONFIG_NET && CONFIG_BPF_SYSCALL */
1771 #if defined(CONFIG_BPF_STREAM_PARSER)
1772 int sock_map_prog_update(struct bpf_map *map, struct bpf_prog *prog,
1773 struct bpf_prog *old, u32 which);
1774 int sock_map_get_from_fd(const union bpf_attr *attr, struct bpf_prog *prog);
1775 int sock_map_prog_detach(const union bpf_attr *attr, enum bpf_prog_type ptype);
1776 int sock_map_update_elem_sys(struct bpf_map *map, void *key, void *value, u64 flags);
1777 void sock_map_unhash(struct sock *sk);
1778 void sock_map_close(struct sock *sk, long timeout);
1780 static inline int sock_map_prog_update(struct bpf_map *map,
1781 struct bpf_prog *prog,
1782 struct bpf_prog *old, u32 which)
1787 static inline int sock_map_get_from_fd(const union bpf_attr *attr,
1788 struct bpf_prog *prog)
1793 static inline int sock_map_prog_detach(const union bpf_attr *attr,
1794 enum bpf_prog_type ptype)
1799 static inline int sock_map_update_elem_sys(struct bpf_map *map, void *key, void *value,
1804 #endif /* CONFIG_BPF_STREAM_PARSER */
1806 #if defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL)
1807 void bpf_sk_reuseport_detach(struct sock *sk);
1808 int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map, void *key,
1810 int bpf_fd_reuseport_array_update_elem(struct bpf_map *map, void *key,
1811 void *value, u64 map_flags);
1813 static inline void bpf_sk_reuseport_detach(struct sock *sk)
1817 #ifdef CONFIG_BPF_SYSCALL
1818 static inline int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map,
1819 void *key, void *value)
1824 static inline int bpf_fd_reuseport_array_update_elem(struct bpf_map *map,
1825 void *key, void *value,
1830 #endif /* CONFIG_BPF_SYSCALL */
1831 #endif /* defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL) */
1833 /* verifier prototypes for helper functions called from eBPF programs */
1834 extern const struct bpf_func_proto bpf_map_lookup_elem_proto;
1835 extern const struct bpf_func_proto bpf_map_update_elem_proto;
1836 extern const struct bpf_func_proto bpf_map_delete_elem_proto;
1837 extern const struct bpf_func_proto bpf_map_push_elem_proto;
1838 extern const struct bpf_func_proto bpf_map_pop_elem_proto;
1839 extern const struct bpf_func_proto bpf_map_peek_elem_proto;
1841 extern const struct bpf_func_proto bpf_get_prandom_u32_proto;
1842 extern const struct bpf_func_proto bpf_get_smp_processor_id_proto;
1843 extern const struct bpf_func_proto bpf_get_numa_node_id_proto;
1844 extern const struct bpf_func_proto bpf_tail_call_proto;
1845 extern const struct bpf_func_proto bpf_ktime_get_ns_proto;
1846 extern const struct bpf_func_proto bpf_ktime_get_boot_ns_proto;
1847 extern const struct bpf_func_proto bpf_get_current_pid_tgid_proto;
1848 extern const struct bpf_func_proto bpf_get_current_uid_gid_proto;
1849 extern const struct bpf_func_proto bpf_get_current_comm_proto;
1850 extern const struct bpf_func_proto bpf_get_stackid_proto;
1851 extern const struct bpf_func_proto bpf_get_stack_proto;
1852 extern const struct bpf_func_proto bpf_get_task_stack_proto;
1853 extern const struct bpf_func_proto bpf_get_stackid_proto_pe;
1854 extern const struct bpf_func_proto bpf_get_stack_proto_pe;
1855 extern const struct bpf_func_proto bpf_sock_map_update_proto;
1856 extern const struct bpf_func_proto bpf_sock_hash_update_proto;
1857 extern const struct bpf_func_proto bpf_get_current_cgroup_id_proto;
1858 extern const struct bpf_func_proto bpf_get_current_ancestor_cgroup_id_proto;
1859 extern const struct bpf_func_proto bpf_msg_redirect_hash_proto;
1860 extern const struct bpf_func_proto bpf_msg_redirect_map_proto;
1861 extern const struct bpf_func_proto bpf_sk_redirect_hash_proto;
1862 extern const struct bpf_func_proto bpf_sk_redirect_map_proto;
1863 extern const struct bpf_func_proto bpf_spin_lock_proto;
1864 extern const struct bpf_func_proto bpf_spin_unlock_proto;
1865 extern const struct bpf_func_proto bpf_get_local_storage_proto;
1866 extern const struct bpf_func_proto bpf_strtol_proto;
1867 extern const struct bpf_func_proto bpf_strtoul_proto;
1868 extern const struct bpf_func_proto bpf_tcp_sock_proto;
1869 extern const struct bpf_func_proto bpf_jiffies64_proto;
1870 extern const struct bpf_func_proto bpf_get_ns_current_pid_tgid_proto;
1871 extern const struct bpf_func_proto bpf_event_output_data_proto;
1872 extern const struct bpf_func_proto bpf_ringbuf_output_proto;
1873 extern const struct bpf_func_proto bpf_ringbuf_reserve_proto;
1874 extern const struct bpf_func_proto bpf_ringbuf_submit_proto;
1875 extern const struct bpf_func_proto bpf_ringbuf_discard_proto;
1876 extern const struct bpf_func_proto bpf_ringbuf_query_proto;
1877 extern const struct bpf_func_proto bpf_skc_to_tcp6_sock_proto;
1878 extern const struct bpf_func_proto bpf_skc_to_tcp_sock_proto;
1879 extern const struct bpf_func_proto bpf_skc_to_tcp_timewait_sock_proto;
1880 extern const struct bpf_func_proto bpf_skc_to_tcp_request_sock_proto;
1881 extern const struct bpf_func_proto bpf_skc_to_udp6_sock_proto;
1882 extern const struct bpf_func_proto bpf_copy_from_user_proto;
1883 extern const struct bpf_func_proto bpf_snprintf_btf_proto;
1884 extern const struct bpf_func_proto bpf_per_cpu_ptr_proto;
1885 extern const struct bpf_func_proto bpf_this_cpu_ptr_proto;
1886 extern const struct bpf_func_proto bpf_ktime_get_coarse_ns_proto;
1887 extern const struct bpf_func_proto bpf_sock_from_file_proto;
1888 extern const struct bpf_func_proto bpf_get_socket_ptr_cookie_proto;
1890 const struct bpf_func_proto *bpf_tracing_func_proto(
1891 enum bpf_func_id func_id, const struct bpf_prog *prog);
1893 const struct bpf_func_proto *tracing_prog_func_proto(
1894 enum bpf_func_id func_id, const struct bpf_prog *prog);
1896 /* Shared helpers among cBPF and eBPF. */
1897 void bpf_user_rnd_init_once(void);
1898 u64 bpf_user_rnd_u32(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
1899 u64 bpf_get_raw_cpu_id(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
1901 #if defined(CONFIG_NET)
1902 bool bpf_sock_common_is_valid_access(int off, int size,
1903 enum bpf_access_type type,
1904 struct bpf_insn_access_aux *info);
1905 bool bpf_sock_is_valid_access(int off, int size, enum bpf_access_type type,
1906 struct bpf_insn_access_aux *info);
1907 u32 bpf_sock_convert_ctx_access(enum bpf_access_type type,
1908 const struct bpf_insn *si,
1909 struct bpf_insn *insn_buf,
1910 struct bpf_prog *prog,
1913 static inline bool bpf_sock_common_is_valid_access(int off, int size,
1914 enum bpf_access_type type,
1915 struct bpf_insn_access_aux *info)
1919 static inline bool bpf_sock_is_valid_access(int off, int size,
1920 enum bpf_access_type type,
1921 struct bpf_insn_access_aux *info)
1925 static inline u32 bpf_sock_convert_ctx_access(enum bpf_access_type type,
1926 const struct bpf_insn *si,
1927 struct bpf_insn *insn_buf,
1928 struct bpf_prog *prog,
1936 struct sk_reuseport_kern {
1937 struct sk_buff *skb;
1939 struct sock *selected_sk;
1945 bool bpf_tcp_sock_is_valid_access(int off, int size, enum bpf_access_type type,
1946 struct bpf_insn_access_aux *info);
1948 u32 bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type,
1949 const struct bpf_insn *si,
1950 struct bpf_insn *insn_buf,
1951 struct bpf_prog *prog,
1954 bool bpf_xdp_sock_is_valid_access(int off, int size, enum bpf_access_type type,
1955 struct bpf_insn_access_aux *info);
1957 u32 bpf_xdp_sock_convert_ctx_access(enum bpf_access_type type,
1958 const struct bpf_insn *si,
1959 struct bpf_insn *insn_buf,
1960 struct bpf_prog *prog,
1963 static inline bool bpf_tcp_sock_is_valid_access(int off, int size,
1964 enum bpf_access_type type,
1965 struct bpf_insn_access_aux *info)
1970 static inline 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,
1978 static inline bool bpf_xdp_sock_is_valid_access(int off, int size,
1979 enum bpf_access_type type,
1980 struct bpf_insn_access_aux *info)
1985 static inline u32 bpf_xdp_sock_convert_ctx_access(enum bpf_access_type type,
1986 const struct bpf_insn *si,
1987 struct bpf_insn *insn_buf,
1988 struct bpf_prog *prog,
1993 #endif /* CONFIG_INET */
1995 enum bpf_text_poke_type {
2000 int bpf_arch_text_poke(void *ip, enum bpf_text_poke_type t,
2001 void *addr1, void *addr2);
2004 bool btf_id_set_contains(const struct btf_id_set *set, u32 id);
2006 #endif /* _LINUX_BPF_H */