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>
25 #include <linux/bpfptr.h>
27 struct bpf_verifier_env;
28 struct bpf_verifier_log;
37 struct exception_table_entry;
38 struct seq_operations;
39 struct bpf_iter_aux_info;
40 struct bpf_local_storage;
41 struct bpf_local_storage_map;
45 struct bpf_func_state;
47 extern struct idr btf_idr;
48 extern spinlock_t btf_idr_lock;
49 extern struct kobject *btf_kobj;
51 typedef int (*bpf_iter_init_seq_priv_t)(void *private_data,
52 struct bpf_iter_aux_info *aux);
53 typedef void (*bpf_iter_fini_seq_priv_t)(void *private_data);
54 struct bpf_iter_seq_info {
55 const struct seq_operations *seq_ops;
56 bpf_iter_init_seq_priv_t init_seq_private;
57 bpf_iter_fini_seq_priv_t fini_seq_private;
61 /* map is generic key/value storage optionally accessible by eBPF programs */
63 /* funcs callable from userspace (via syscall) */
64 int (*map_alloc_check)(union bpf_attr *attr);
65 struct bpf_map *(*map_alloc)(union bpf_attr *attr);
66 void (*map_release)(struct bpf_map *map, struct file *map_file);
67 void (*map_free)(struct bpf_map *map);
68 int (*map_get_next_key)(struct bpf_map *map, void *key, void *next_key);
69 void (*map_release_uref)(struct bpf_map *map);
70 void *(*map_lookup_elem_sys_only)(struct bpf_map *map, void *key);
71 int (*map_lookup_batch)(struct bpf_map *map, const union bpf_attr *attr,
72 union bpf_attr __user *uattr);
73 int (*map_lookup_and_delete_elem)(struct bpf_map *map, void *key,
74 void *value, u64 flags);
75 int (*map_lookup_and_delete_batch)(struct bpf_map *map,
76 const union bpf_attr *attr,
77 union bpf_attr __user *uattr);
78 int (*map_update_batch)(struct bpf_map *map, const union bpf_attr *attr,
79 union bpf_attr __user *uattr);
80 int (*map_delete_batch)(struct bpf_map *map, const union bpf_attr *attr,
81 union bpf_attr __user *uattr);
83 /* funcs callable from userspace and from eBPF programs */
84 void *(*map_lookup_elem)(struct bpf_map *map, void *key);
85 int (*map_update_elem)(struct bpf_map *map, void *key, void *value, u64 flags);
86 int (*map_delete_elem)(struct bpf_map *map, void *key);
87 int (*map_push_elem)(struct bpf_map *map, void *value, u64 flags);
88 int (*map_pop_elem)(struct bpf_map *map, void *value);
89 int (*map_peek_elem)(struct bpf_map *map, void *value);
91 /* funcs called by prog_array and perf_event_array map */
92 void *(*map_fd_get_ptr)(struct bpf_map *map, struct file *map_file,
94 void (*map_fd_put_ptr)(void *ptr);
95 int (*map_gen_lookup)(struct bpf_map *map, struct bpf_insn *insn_buf);
96 u32 (*map_fd_sys_lookup_elem)(void *ptr);
97 void (*map_seq_show_elem)(struct bpf_map *map, void *key,
99 int (*map_check_btf)(const struct bpf_map *map,
100 const struct btf *btf,
101 const struct btf_type *key_type,
102 const struct btf_type *value_type);
104 /* Prog poke tracking helpers. */
105 int (*map_poke_track)(struct bpf_map *map, struct bpf_prog_aux *aux);
106 void (*map_poke_untrack)(struct bpf_map *map, struct bpf_prog_aux *aux);
107 void (*map_poke_run)(struct bpf_map *map, u32 key, struct bpf_prog *old,
108 struct bpf_prog *new);
110 /* Direct value access helpers. */
111 int (*map_direct_value_addr)(const struct bpf_map *map,
113 int (*map_direct_value_meta)(const struct bpf_map *map,
115 int (*map_mmap)(struct bpf_map *map, struct vm_area_struct *vma);
116 __poll_t (*map_poll)(struct bpf_map *map, struct file *filp,
117 struct poll_table_struct *pts);
119 /* Functions called by bpf_local_storage maps */
120 int (*map_local_storage_charge)(struct bpf_local_storage_map *smap,
121 void *owner, u32 size);
122 void (*map_local_storage_uncharge)(struct bpf_local_storage_map *smap,
123 void *owner, u32 size);
124 struct bpf_local_storage __rcu ** (*map_owner_storage_ptr)(void *owner);
127 int (*map_redirect)(struct bpf_map *map, u32 ifindex, u64 flags);
129 /* map_meta_equal must be implemented for maps that can be
130 * used as an inner map. It is a runtime check to ensure
131 * an inner map can be inserted to an outer map.
133 * Some properties of the inner map has been used during the
134 * verification time. When inserting an inner map at the runtime,
135 * map_meta_equal has to ensure the inserting map has the same
136 * properties that the verifier has used earlier.
138 bool (*map_meta_equal)(const struct bpf_map *meta0,
139 const struct bpf_map *meta1);
142 int (*map_set_for_each_callback_args)(struct bpf_verifier_env *env,
143 struct bpf_func_state *caller,
144 struct bpf_func_state *callee);
145 int (*map_for_each_callback)(struct bpf_map *map, void *callback_fn,
146 void *callback_ctx, u64 flags);
148 /* BTF name and id of struct allocated by map_alloc */
149 const char * const map_btf_name;
152 /* bpf_iter info used to open a seq_file */
153 const struct bpf_iter_seq_info *iter_seq_info;
157 /* The first two cachelines with read-mostly members of which some
158 * are also accessed in fast-path (e.g. ops, max_entries).
160 const struct bpf_map_ops *ops ____cacheline_aligned;
161 struct bpf_map *inner_map_meta;
162 #ifdef CONFIG_SECURITY
165 enum bpf_map_type map_type;
170 int spin_lock_off; /* >=0 valid offset, <0 error */
171 int timer_off; /* >=0 valid offset, <0 error */
175 u32 btf_value_type_id;
177 #ifdef CONFIG_MEMCG_KMEM
178 struct mem_cgroup *memcg;
180 char name[BPF_OBJ_NAME_LEN];
181 u32 btf_vmlinux_value_type_id;
183 bool frozen; /* write-once; write-protected by freeze_mutex */
186 /* The 3rd and 4th cacheline with misc members to avoid false sharing
187 * particularly with refcounting.
189 atomic64_t refcnt ____cacheline_aligned;
191 struct work_struct work;
192 struct mutex freeze_mutex;
193 u64 writecnt; /* writable mmap cnt; protected by freeze_mutex */
196 static inline bool map_value_has_spin_lock(const struct bpf_map *map)
198 return map->spin_lock_off >= 0;
201 static inline bool map_value_has_timer(const struct bpf_map *map)
203 return map->timer_off >= 0;
206 static inline void check_and_init_map_value(struct bpf_map *map, void *dst)
208 if (unlikely(map_value_has_spin_lock(map)))
209 *(struct bpf_spin_lock *)(dst + map->spin_lock_off) =
210 (struct bpf_spin_lock){};
211 if (unlikely(map_value_has_timer(map)))
212 *(struct bpf_timer *)(dst + map->timer_off) =
213 (struct bpf_timer){};
216 /* copy everything but bpf_spin_lock and bpf_timer. There could be one of each. */
217 static inline void copy_map_value(struct bpf_map *map, void *dst, void *src)
219 u32 s_off = 0, s_sz = 0, t_off = 0, t_sz = 0;
221 if (unlikely(map_value_has_spin_lock(map))) {
222 s_off = map->spin_lock_off;
223 s_sz = sizeof(struct bpf_spin_lock);
224 } else if (unlikely(map_value_has_timer(map))) {
225 t_off = map->timer_off;
226 t_sz = sizeof(struct bpf_timer);
229 if (unlikely(s_sz || t_sz)) {
230 if (s_off < t_off || !s_sz) {
234 memcpy(dst, src, t_off);
235 memcpy(dst + t_off + t_sz,
237 s_off - t_off - t_sz);
238 memcpy(dst + s_off + s_sz,
240 map->value_size - s_off - s_sz);
242 memcpy(dst, src, map->value_size);
245 void copy_map_value_locked(struct bpf_map *map, void *dst, void *src,
247 void bpf_timer_cancel_and_free(void *timer);
248 int bpf_obj_name_cpy(char *dst, const char *src, unsigned int size);
250 struct bpf_offload_dev;
251 struct bpf_offloaded_map;
253 struct bpf_map_dev_ops {
254 int (*map_get_next_key)(struct bpf_offloaded_map *map,
255 void *key, void *next_key);
256 int (*map_lookup_elem)(struct bpf_offloaded_map *map,
257 void *key, void *value);
258 int (*map_update_elem)(struct bpf_offloaded_map *map,
259 void *key, void *value, u64 flags);
260 int (*map_delete_elem)(struct bpf_offloaded_map *map, void *key);
263 struct bpf_offloaded_map {
265 struct net_device *netdev;
266 const struct bpf_map_dev_ops *dev_ops;
268 struct list_head offloads;
271 static inline struct bpf_offloaded_map *map_to_offmap(struct bpf_map *map)
273 return container_of(map, struct bpf_offloaded_map, map);
276 static inline bool bpf_map_offload_neutral(const struct bpf_map *map)
278 return map->map_type == BPF_MAP_TYPE_PERF_EVENT_ARRAY;
281 static inline bool bpf_map_support_seq_show(const struct bpf_map *map)
283 return (map->btf_value_type_id || map->btf_vmlinux_value_type_id) &&
284 map->ops->map_seq_show_elem;
287 int map_check_no_btf(const struct bpf_map *map,
288 const struct btf *btf,
289 const struct btf_type *key_type,
290 const struct btf_type *value_type);
292 bool bpf_map_meta_equal(const struct bpf_map *meta0,
293 const struct bpf_map *meta1);
295 extern const struct bpf_map_ops bpf_map_offload_ops;
297 /* function argument constraints */
299 ARG_DONTCARE = 0, /* unused argument in helper function */
301 /* the following constraints used to prototype
302 * bpf_map_lookup/update/delete_elem() functions
304 ARG_CONST_MAP_PTR, /* const argument used as pointer to bpf_map */
305 ARG_PTR_TO_MAP_KEY, /* pointer to stack used as map key */
306 ARG_PTR_TO_MAP_VALUE, /* pointer to stack used as map value */
307 ARG_PTR_TO_UNINIT_MAP_VALUE, /* pointer to valid memory used to store a map value */
308 ARG_PTR_TO_MAP_VALUE_OR_NULL, /* pointer to stack used as map value or NULL */
310 /* the following constraints used to prototype bpf_memcmp() and other
311 * functions that access data on eBPF program stack
313 ARG_PTR_TO_MEM, /* pointer to valid memory (stack, packet, map value) */
314 ARG_PTR_TO_MEM_OR_NULL, /* pointer to valid memory or NULL */
315 ARG_PTR_TO_UNINIT_MEM, /* pointer to memory does not need to be initialized,
316 * helper function must fill all bytes or clear
317 * them in error case.
320 ARG_CONST_SIZE, /* number of bytes accessed from memory */
321 ARG_CONST_SIZE_OR_ZERO, /* number of bytes accessed from memory or 0 */
323 ARG_PTR_TO_CTX, /* pointer to context */
324 ARG_PTR_TO_CTX_OR_NULL, /* pointer to context or NULL */
325 ARG_ANYTHING, /* any (initialized) argument is ok */
326 ARG_PTR_TO_SPIN_LOCK, /* pointer to bpf_spin_lock */
327 ARG_PTR_TO_SOCK_COMMON, /* pointer to sock_common */
328 ARG_PTR_TO_INT, /* pointer to int */
329 ARG_PTR_TO_LONG, /* pointer to long */
330 ARG_PTR_TO_SOCKET, /* pointer to bpf_sock (fullsock) */
331 ARG_PTR_TO_SOCKET_OR_NULL, /* pointer to bpf_sock (fullsock) or NULL */
332 ARG_PTR_TO_BTF_ID, /* pointer to in-kernel struct */
333 ARG_PTR_TO_ALLOC_MEM, /* pointer to dynamically allocated memory */
334 ARG_PTR_TO_ALLOC_MEM_OR_NULL, /* pointer to dynamically allocated memory or NULL */
335 ARG_CONST_ALLOC_SIZE_OR_ZERO, /* number of allocated bytes requested */
336 ARG_PTR_TO_BTF_ID_SOCK_COMMON, /* pointer to in-kernel sock_common or bpf-mirrored bpf_sock */
337 ARG_PTR_TO_PERCPU_BTF_ID, /* pointer to in-kernel percpu type */
338 ARG_PTR_TO_FUNC, /* pointer to a bpf program function */
339 ARG_PTR_TO_STACK_OR_NULL, /* pointer to stack or NULL */
340 ARG_PTR_TO_CONST_STR, /* pointer to a null terminated read-only string */
341 ARG_PTR_TO_TIMER, /* pointer to bpf_timer */
345 /* type of values returned from helper functions */
346 enum bpf_return_type {
347 RET_INTEGER, /* function returns integer */
348 RET_VOID, /* function doesn't return anything */
349 RET_PTR_TO_MAP_VALUE, /* returns a pointer to map elem value */
350 RET_PTR_TO_MAP_VALUE_OR_NULL, /* returns a pointer to map elem value or NULL */
351 RET_PTR_TO_SOCKET_OR_NULL, /* returns a pointer to a socket or NULL */
352 RET_PTR_TO_TCP_SOCK_OR_NULL, /* returns a pointer to a tcp_sock or NULL */
353 RET_PTR_TO_SOCK_COMMON_OR_NULL, /* returns a pointer to a sock_common or NULL */
354 RET_PTR_TO_ALLOC_MEM_OR_NULL, /* returns a pointer to dynamically allocated memory or NULL */
355 RET_PTR_TO_BTF_ID_OR_NULL, /* returns a pointer to a btf_id or NULL */
356 RET_PTR_TO_MEM_OR_BTF_ID_OR_NULL, /* returns a pointer to a valid memory or a btf_id or NULL */
357 RET_PTR_TO_MEM_OR_BTF_ID, /* returns a pointer to a valid memory or a btf_id */
358 RET_PTR_TO_BTF_ID, /* returns a pointer to a btf_id */
361 /* eBPF function prototype used by verifier to allow BPF_CALLs from eBPF programs
362 * to in-kernel helper functions and for adjusting imm32 field in BPF_CALL
363 * instructions after verifying
365 struct bpf_func_proto {
366 u64 (*func)(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
369 enum bpf_return_type ret_type;
372 enum bpf_arg_type arg1_type;
373 enum bpf_arg_type arg2_type;
374 enum bpf_arg_type arg3_type;
375 enum bpf_arg_type arg4_type;
376 enum bpf_arg_type arg5_type;
378 enum bpf_arg_type arg_type[5];
390 int *ret_btf_id; /* return value btf_id */
391 bool (*allowed)(const struct bpf_prog *prog);
394 /* bpf_context is intentionally undefined structure. Pointer to bpf_context is
395 * the first argument to eBPF programs.
396 * For socket filters: 'struct bpf_context *' == 'struct sk_buff *'
400 enum bpf_access_type {
405 /* types of values stored in eBPF registers */
406 /* Pointer types represent:
409 * pointer + (u16) var
410 * pointer + (u16) var + imm
411 * if (range > 0) then [ptr, ptr + range - off) is safe to access
412 * if (id > 0) means that some 'var' was added
413 * if (off > 0) means that 'imm' was added
416 NOT_INIT = 0, /* nothing was written into register */
417 SCALAR_VALUE, /* reg doesn't contain a valid pointer */
418 PTR_TO_CTX, /* reg points to bpf_context */
419 CONST_PTR_TO_MAP, /* reg points to struct bpf_map */
420 PTR_TO_MAP_VALUE, /* reg points to map element value */
421 PTR_TO_MAP_VALUE_OR_NULL,/* points to map elem value or NULL */
422 PTR_TO_STACK, /* reg == frame_pointer + offset */
423 PTR_TO_PACKET_META, /* skb->data - meta_len */
424 PTR_TO_PACKET, /* reg points to skb->data */
425 PTR_TO_PACKET_END, /* skb->data + headlen */
426 PTR_TO_FLOW_KEYS, /* reg points to bpf_flow_keys */
427 PTR_TO_SOCKET, /* reg points to struct bpf_sock */
428 PTR_TO_SOCKET_OR_NULL, /* reg points to struct bpf_sock or NULL */
429 PTR_TO_SOCK_COMMON, /* reg points to sock_common */
430 PTR_TO_SOCK_COMMON_OR_NULL, /* reg points to sock_common or NULL */
431 PTR_TO_TCP_SOCK, /* reg points to struct tcp_sock */
432 PTR_TO_TCP_SOCK_OR_NULL, /* reg points to struct tcp_sock or NULL */
433 PTR_TO_TP_BUFFER, /* reg points to a writable raw tp's buffer */
434 PTR_TO_XDP_SOCK, /* reg points to struct xdp_sock */
435 /* PTR_TO_BTF_ID points to a kernel struct that does not need
436 * to be null checked by the BPF program. This does not imply the
437 * pointer is _not_ null and in practice this can easily be a null
438 * pointer when reading pointer chains. The assumption is program
439 * context will handle null pointer dereference typically via fault
440 * handling. The verifier must keep this in mind and can make no
441 * assumptions about null or non-null when doing branch analysis.
442 * Further, when passed into helpers the helpers can not, without
443 * additional context, assume the value is non-null.
446 /* PTR_TO_BTF_ID_OR_NULL points to a kernel struct that has not
447 * been checked for null. Used primarily to inform the verifier
448 * an explicit null check is required for this struct.
450 PTR_TO_BTF_ID_OR_NULL,
451 PTR_TO_MEM, /* reg points to valid memory region */
452 PTR_TO_MEM_OR_NULL, /* reg points to valid memory region or NULL */
453 PTR_TO_RDONLY_BUF, /* reg points to a readonly buffer */
454 PTR_TO_RDONLY_BUF_OR_NULL, /* reg points to a readonly buffer or NULL */
455 PTR_TO_RDWR_BUF, /* reg points to a read/write buffer */
456 PTR_TO_RDWR_BUF_OR_NULL, /* reg points to a read/write buffer or NULL */
457 PTR_TO_PERCPU_BTF_ID, /* reg points to a percpu kernel variable */
458 PTR_TO_FUNC, /* reg points to a bpf program function */
459 PTR_TO_MAP_KEY, /* reg points to a map element key */
463 /* The information passed from prog-specific *_is_valid_access
464 * back to the verifier.
466 struct bpf_insn_access_aux {
467 enum bpf_reg_type reg_type;
475 struct bpf_verifier_log *log; /* for verbose logs */
479 bpf_ctx_record_field_size(struct bpf_insn_access_aux *aux, u32 size)
481 aux->ctx_field_size = size;
484 struct bpf_prog_ops {
485 int (*test_run)(struct bpf_prog *prog, const union bpf_attr *kattr,
486 union bpf_attr __user *uattr);
489 struct bpf_verifier_ops {
490 /* return eBPF function prototype for verification */
491 const struct bpf_func_proto *
492 (*get_func_proto)(enum bpf_func_id func_id,
493 const struct bpf_prog *prog);
495 /* return true if 'size' wide access at offset 'off' within bpf_context
496 * with 'type' (read or write) is allowed
498 bool (*is_valid_access)(int off, int size, enum bpf_access_type type,
499 const struct bpf_prog *prog,
500 struct bpf_insn_access_aux *info);
501 int (*gen_prologue)(struct bpf_insn *insn, bool direct_write,
502 const struct bpf_prog *prog);
503 int (*gen_ld_abs)(const struct bpf_insn *orig,
504 struct bpf_insn *insn_buf);
505 u32 (*convert_ctx_access)(enum bpf_access_type type,
506 const struct bpf_insn *src,
507 struct bpf_insn *dst,
508 struct bpf_prog *prog, u32 *target_size);
509 int (*btf_struct_access)(struct bpf_verifier_log *log,
510 const struct btf *btf,
511 const struct btf_type *t, int off, int size,
512 enum bpf_access_type atype,
514 bool (*check_kfunc_call)(u32 kfunc_btf_id);
517 struct bpf_prog_offload_ops {
518 /* verifier basic callbacks */
519 int (*insn_hook)(struct bpf_verifier_env *env,
520 int insn_idx, int prev_insn_idx);
521 int (*finalize)(struct bpf_verifier_env *env);
522 /* verifier optimization callbacks (called after .finalize) */
523 int (*replace_insn)(struct bpf_verifier_env *env, u32 off,
524 struct bpf_insn *insn);
525 int (*remove_insns)(struct bpf_verifier_env *env, u32 off, u32 cnt);
526 /* program management callbacks */
527 int (*prepare)(struct bpf_prog *prog);
528 int (*translate)(struct bpf_prog *prog);
529 void (*destroy)(struct bpf_prog *prog);
532 struct bpf_prog_offload {
533 struct bpf_prog *prog;
534 struct net_device *netdev;
535 struct bpf_offload_dev *offdev;
537 struct list_head offloads;
544 enum bpf_cgroup_storage_type {
545 BPF_CGROUP_STORAGE_SHARED,
546 BPF_CGROUP_STORAGE_PERCPU,
547 __BPF_CGROUP_STORAGE_MAX
550 #define MAX_BPF_CGROUP_STORAGE_TYPE __BPF_CGROUP_STORAGE_MAX
552 /* The longest tracepoint has 12 args.
553 * See include/trace/bpf_probe.h
555 #define MAX_BPF_FUNC_ARGS 12
557 /* The maximum number of arguments passed through registers
558 * a single function may have.
560 #define MAX_BPF_FUNC_REG_ARGS 5
562 struct btf_func_model {
565 u8 arg_size[MAX_BPF_FUNC_ARGS];
568 /* Restore arguments before returning from trampoline to let original function
569 * continue executing. This flag is used for fentry progs when there are no
572 #define BPF_TRAMP_F_RESTORE_REGS BIT(0)
573 /* Call original function after fentry progs, but before fexit progs.
574 * Makes sense for fentry/fexit, normal calls and indirect calls.
576 #define BPF_TRAMP_F_CALL_ORIG BIT(1)
577 /* Skip current frame and return to parent. Makes sense for fentry/fexit
578 * programs only. Should not be used with normal calls and indirect calls.
580 #define BPF_TRAMP_F_SKIP_FRAME BIT(2)
581 /* Store IP address of the caller on the trampoline stack,
582 * so it's available for trampoline's programs.
584 #define BPF_TRAMP_F_IP_ARG BIT(3)
585 /* Return the return value of fentry prog. Only used by bpf_struct_ops. */
586 #define BPF_TRAMP_F_RET_FENTRY_RET BIT(4)
588 /* Each call __bpf_prog_enter + call bpf_func + call __bpf_prog_exit is ~50
589 * bytes on x86. Pick a number to fit into BPF_IMAGE_SIZE / 2
591 #define BPF_MAX_TRAMP_PROGS 38
593 struct bpf_tramp_progs {
594 struct bpf_prog *progs[BPF_MAX_TRAMP_PROGS];
598 /* Different use cases for BPF trampoline:
599 * 1. replace nop at the function entry (kprobe equivalent)
600 * flags = BPF_TRAMP_F_RESTORE_REGS
601 * fentry = a set of programs to run before returning from trampoline
603 * 2. replace nop at the function entry (kprobe + kretprobe equivalent)
604 * flags = BPF_TRAMP_F_CALL_ORIG | BPF_TRAMP_F_SKIP_FRAME
605 * orig_call = fentry_ip + MCOUNT_INSN_SIZE
606 * fentry = a set of program to run before calling original function
607 * fexit = a set of program to run after original function
609 * 3. replace direct call instruction anywhere in the function body
610 * or assign a function pointer for indirect call (like tcp_congestion_ops->cong_avoid)
612 * fentry = a set of programs to run before returning from trampoline
613 * With flags = BPF_TRAMP_F_CALL_ORIG
614 * orig_call = original callback addr or direct function addr
615 * fentry = a set of program to run before calling original function
616 * fexit = a set of program to run after original function
618 struct bpf_tramp_image;
619 int arch_prepare_bpf_trampoline(struct bpf_tramp_image *tr, void *image, void *image_end,
620 const struct btf_func_model *m, u32 flags,
621 struct bpf_tramp_progs *tprogs,
623 /* these two functions are called from generated trampoline */
624 u64 notrace __bpf_prog_enter(struct bpf_prog *prog);
625 void notrace __bpf_prog_exit(struct bpf_prog *prog, u64 start);
626 u64 notrace __bpf_prog_enter_sleepable(struct bpf_prog *prog);
627 void notrace __bpf_prog_exit_sleepable(struct bpf_prog *prog, u64 start);
628 void notrace __bpf_tramp_enter(struct bpf_tramp_image *tr);
629 void notrace __bpf_tramp_exit(struct bpf_tramp_image *tr);
634 char name[KSYM_NAME_LEN];
635 struct list_head lnode;
636 struct latch_tree_node tnode;
640 enum bpf_tramp_prog_type {
643 BPF_TRAMP_MODIFY_RETURN,
645 BPF_TRAMP_REPLACE, /* more than MAX */
648 struct bpf_tramp_image {
650 struct bpf_ksym ksym;
651 struct percpu_ref pcref;
656 struct work_struct work;
660 struct bpf_trampoline {
661 /* hlist for trampoline_table */
662 struct hlist_node hlist;
663 /* serializes access to fields of this trampoline */
668 struct btf_func_model model;
672 /* if !NULL this is BPF_PROG_TYPE_EXT program that extends another BPF
673 * program by replacing one of its functions. func.addr is the address
674 * of the function it replaced.
676 struct bpf_prog *extension_prog;
677 /* list of BPF programs using this trampoline */
678 struct hlist_head progs_hlist[BPF_TRAMP_MAX];
679 /* Number of attached programs. A counter per kind. */
680 int progs_cnt[BPF_TRAMP_MAX];
681 /* Executable image of trampoline */
682 struct bpf_tramp_image *cur_image;
687 struct bpf_attach_target_info {
688 struct btf_func_model fmodel;
690 const char *tgt_name;
691 const struct btf_type *tgt_type;
694 #define BPF_DISPATCHER_MAX 48 /* Fits in 2048B */
696 struct bpf_dispatcher_prog {
697 struct bpf_prog *prog;
701 struct bpf_dispatcher {
702 /* dispatcher mutex */
705 struct bpf_dispatcher_prog progs[BPF_DISPATCHER_MAX];
709 struct bpf_ksym ksym;
712 static __always_inline __nocfi unsigned int bpf_dispatcher_nop_func(
714 const struct bpf_insn *insnsi,
715 unsigned int (*bpf_func)(const void *,
716 const struct bpf_insn *))
718 return bpf_func(ctx, insnsi);
720 #ifdef CONFIG_BPF_JIT
721 int bpf_trampoline_link_prog(struct bpf_prog *prog, struct bpf_trampoline *tr);
722 int bpf_trampoline_unlink_prog(struct bpf_prog *prog, struct bpf_trampoline *tr);
723 struct bpf_trampoline *bpf_trampoline_get(u64 key,
724 struct bpf_attach_target_info *tgt_info);
725 void bpf_trampoline_put(struct bpf_trampoline *tr);
726 #define BPF_DISPATCHER_INIT(_name) { \
727 .mutex = __MUTEX_INITIALIZER(_name.mutex), \
728 .func = &_name##_func, \
735 .lnode = LIST_HEAD_INIT(_name.ksym.lnode), \
739 #define DEFINE_BPF_DISPATCHER(name) \
740 noinline __nocfi unsigned int bpf_dispatcher_##name##_func( \
742 const struct bpf_insn *insnsi, \
743 unsigned int (*bpf_func)(const void *, \
744 const struct bpf_insn *)) \
746 return bpf_func(ctx, insnsi); \
748 EXPORT_SYMBOL(bpf_dispatcher_##name##_func); \
749 struct bpf_dispatcher bpf_dispatcher_##name = \
750 BPF_DISPATCHER_INIT(bpf_dispatcher_##name);
751 #define DECLARE_BPF_DISPATCHER(name) \
752 unsigned int bpf_dispatcher_##name##_func( \
754 const struct bpf_insn *insnsi, \
755 unsigned int (*bpf_func)(const void *, \
756 const struct bpf_insn *)); \
757 extern struct bpf_dispatcher bpf_dispatcher_##name;
758 #define BPF_DISPATCHER_FUNC(name) bpf_dispatcher_##name##_func
759 #define BPF_DISPATCHER_PTR(name) (&bpf_dispatcher_##name)
760 void bpf_dispatcher_change_prog(struct bpf_dispatcher *d, struct bpf_prog *from,
761 struct bpf_prog *to);
762 /* Called only from JIT-enabled code, so there's no need for stubs. */
763 void *bpf_jit_alloc_exec_page(void);
764 void bpf_image_ksym_add(void *data, struct bpf_ksym *ksym);
765 void bpf_image_ksym_del(struct bpf_ksym *ksym);
766 void bpf_ksym_add(struct bpf_ksym *ksym);
767 void bpf_ksym_del(struct bpf_ksym *ksym);
768 int bpf_jit_charge_modmem(u32 pages);
769 void bpf_jit_uncharge_modmem(u32 pages);
771 static inline int bpf_trampoline_link_prog(struct bpf_prog *prog,
772 struct bpf_trampoline *tr)
776 static inline int bpf_trampoline_unlink_prog(struct bpf_prog *prog,
777 struct bpf_trampoline *tr)
781 static inline struct bpf_trampoline *bpf_trampoline_get(u64 key,
782 struct bpf_attach_target_info *tgt_info)
784 return ERR_PTR(-EOPNOTSUPP);
786 static inline void bpf_trampoline_put(struct bpf_trampoline *tr) {}
787 #define DEFINE_BPF_DISPATCHER(name)
788 #define DECLARE_BPF_DISPATCHER(name)
789 #define BPF_DISPATCHER_FUNC(name) bpf_dispatcher_nop_func
790 #define BPF_DISPATCHER_PTR(name) NULL
791 static inline void bpf_dispatcher_change_prog(struct bpf_dispatcher *d,
792 struct bpf_prog *from,
793 struct bpf_prog *to) {}
794 static inline bool is_bpf_image_address(unsigned long address)
800 struct bpf_func_info_aux {
805 enum bpf_jit_poke_reason {
806 BPF_POKE_REASON_TAIL_CALL,
809 /* Descriptor of pokes pointing /into/ the JITed image. */
810 struct bpf_jit_poke_descriptor {
811 void *tailcall_target;
812 void *tailcall_bypass;
821 bool tailcall_target_stable;
827 /* reg_type info for ctx arguments */
828 struct bpf_ctx_arg_aux {
830 enum bpf_reg_type reg_type;
834 struct btf_mod_pair {
836 struct module *module;
839 struct bpf_kfunc_desc_tab;
841 struct bpf_prog_aux {
850 u32 func_cnt; /* used by non-func prog as the number of func progs */
851 u32 func_idx; /* 0 for non-func prog, the index in func array for func prog */
852 u32 attach_btf_id; /* in-kernel BTF type id to attach to */
853 u32 ctx_arg_info_size;
854 u32 max_rdonly_access;
856 struct btf *attach_btf;
857 const struct bpf_ctx_arg_aux *ctx_arg_info;
858 struct mutex dst_mutex; /* protects dst_* pointers below, *after* prog becomes visible */
859 struct bpf_prog *dst_prog;
860 struct bpf_trampoline *dst_trampoline;
861 enum bpf_prog_type saved_dst_prog_type;
862 enum bpf_attach_type saved_dst_attach_type;
863 bool verifier_zext; /* Zero extensions has been inserted by verifier. */
864 bool offload_requested;
865 bool attach_btf_trace; /* true if attaching to BTF-enabled raw tp */
866 bool func_proto_unreliable;
868 bool tail_call_reachable;
869 struct hlist_node tramp_hlist;
870 /* BTF_KIND_FUNC_PROTO for valid attach_btf_id */
871 const struct btf_type *attach_func_proto;
872 /* function name for valid attach_btf_id */
873 const char *attach_func_name;
874 struct bpf_prog **func;
875 void *jit_data; /* JIT specific data. arch dependent */
876 struct bpf_jit_poke_descriptor *poke_tab;
877 struct bpf_kfunc_desc_tab *kfunc_tab;
879 struct bpf_ksym ksym;
880 const struct bpf_prog_ops *ops;
881 struct bpf_map **used_maps;
882 struct mutex used_maps_mutex; /* mutex for used_maps and used_map_cnt */
883 struct btf_mod_pair *used_btfs;
884 struct bpf_prog *prog;
885 struct user_struct *user;
886 u64 load_time; /* ns since boottime */
887 struct bpf_map *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE];
888 char name[BPF_OBJ_NAME_LEN];
889 #ifdef CONFIG_SECURITY
892 struct bpf_prog_offload *offload;
894 struct bpf_func_info *func_info;
895 struct bpf_func_info_aux *func_info_aux;
896 /* bpf_line_info loaded from userspace. linfo->insn_off
897 * has the xlated insn offset.
898 * Both the main and sub prog share the same linfo.
899 * The subprog can access its first linfo by
900 * using the linfo_idx.
902 struct bpf_line_info *linfo;
903 /* jited_linfo is the jited addr of the linfo. It has a
904 * one to one mapping to linfo:
905 * jited_linfo[i] is the jited addr for the linfo[i]->insn_off.
906 * Both the main and sub prog share the same jited_linfo.
907 * The subprog can access its first jited_linfo by
908 * using the linfo_idx.
913 /* subprog can use linfo_idx to access its first linfo and
915 * main prog always has linfo_idx == 0
919 struct exception_table_entry *extable;
921 struct work_struct work;
926 struct bpf_array_aux {
927 /* 'Ownership' of prog array is claimed by the first program that
928 * is going to use this map or by the first program which FD is
929 * stored in the map to make sure that all callers and callees have
930 * the same prog type and JITed flag.
932 enum bpf_prog_type type;
934 /* Programs with direct jumps into programs part of this array. */
935 struct list_head poke_progs;
937 struct mutex poke_mutex;
938 struct work_struct work;
944 enum bpf_link_type type;
945 const struct bpf_link_ops *ops;
946 struct bpf_prog *prog;
947 struct work_struct work;
950 struct bpf_link_ops {
951 void (*release)(struct bpf_link *link);
952 void (*dealloc)(struct bpf_link *link);
953 int (*detach)(struct bpf_link *link);
954 int (*update_prog)(struct bpf_link *link, struct bpf_prog *new_prog,
955 struct bpf_prog *old_prog);
956 void (*show_fdinfo)(const struct bpf_link *link, struct seq_file *seq);
957 int (*fill_link_info)(const struct bpf_link *link,
958 struct bpf_link_info *info);
961 struct bpf_link_primer {
962 struct bpf_link *link;
968 struct bpf_struct_ops_value;
971 #define BPF_STRUCT_OPS_MAX_NR_MEMBERS 64
972 struct bpf_struct_ops {
973 const struct bpf_verifier_ops *verifier_ops;
974 int (*init)(struct btf *btf);
975 int (*check_member)(const struct btf_type *t,
976 const struct btf_member *member);
977 int (*init_member)(const struct btf_type *t,
978 const struct btf_member *member,
979 void *kdata, const void *udata);
980 int (*reg)(void *kdata);
981 void (*unreg)(void *kdata);
982 const struct btf_type *type;
983 const struct btf_type *value_type;
985 struct btf_func_model func_models[BPF_STRUCT_OPS_MAX_NR_MEMBERS];
990 #if defined(CONFIG_BPF_JIT) && defined(CONFIG_BPF_SYSCALL)
991 #define BPF_MODULE_OWNER ((void *)((0xeB9FUL << 2) + POISON_POINTER_DELTA))
992 const struct bpf_struct_ops *bpf_struct_ops_find(u32 type_id);
993 void bpf_struct_ops_init(struct btf *btf, struct bpf_verifier_log *log);
994 bool bpf_struct_ops_get(const void *kdata);
995 void bpf_struct_ops_put(const void *kdata);
996 int bpf_struct_ops_map_sys_lookup_elem(struct bpf_map *map, void *key,
998 static inline bool bpf_try_module_get(const void *data, struct module *owner)
1000 if (owner == BPF_MODULE_OWNER)
1001 return bpf_struct_ops_get(data);
1003 return try_module_get(owner);
1005 static inline void bpf_module_put(const void *data, struct module *owner)
1007 if (owner == BPF_MODULE_OWNER)
1008 bpf_struct_ops_put(data);
1013 static inline const struct bpf_struct_ops *bpf_struct_ops_find(u32 type_id)
1017 static inline void bpf_struct_ops_init(struct btf *btf,
1018 struct bpf_verifier_log *log)
1021 static inline bool bpf_try_module_get(const void *data, struct module *owner)
1023 return try_module_get(owner);
1025 static inline void bpf_module_put(const void *data, struct module *owner)
1029 static inline int bpf_struct_ops_map_sys_lookup_elem(struct bpf_map *map,
1041 struct bpf_array_aux *aux;
1043 char value[0] __aligned(8);
1044 void *ptrs[0] __aligned(8);
1045 void __percpu *pptrs[0] __aligned(8);
1049 #define BPF_COMPLEXITY_LIMIT_INSNS 1000000 /* yes. 1M insns */
1050 #define MAX_TAIL_CALL_CNT 32
1052 #define BPF_F_ACCESS_MASK (BPF_F_RDONLY | \
1053 BPF_F_RDONLY_PROG | \
1057 #define BPF_MAP_CAN_READ BIT(0)
1058 #define BPF_MAP_CAN_WRITE BIT(1)
1060 static inline u32 bpf_map_flags_to_cap(struct bpf_map *map)
1062 u32 access_flags = map->map_flags & (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG);
1064 /* Combination of BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG is
1067 if (access_flags & BPF_F_RDONLY_PROG)
1068 return BPF_MAP_CAN_READ;
1069 else if (access_flags & BPF_F_WRONLY_PROG)
1070 return BPF_MAP_CAN_WRITE;
1072 return BPF_MAP_CAN_READ | BPF_MAP_CAN_WRITE;
1075 static inline bool bpf_map_flags_access_ok(u32 access_flags)
1077 return (access_flags & (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG)) !=
1078 (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG);
1081 struct bpf_event_entry {
1082 struct perf_event *event;
1083 struct file *perf_file;
1084 struct file *map_file;
1085 struct rcu_head rcu;
1088 bool bpf_prog_array_compatible(struct bpf_array *array, const struct bpf_prog *fp);
1089 int bpf_prog_calc_tag(struct bpf_prog *fp);
1091 const struct bpf_func_proto *bpf_get_trace_printk_proto(void);
1093 typedef unsigned long (*bpf_ctx_copy_t)(void *dst, const void *src,
1094 unsigned long off, unsigned long len);
1095 typedef u32 (*bpf_convert_ctx_access_t)(enum bpf_access_type type,
1096 const struct bpf_insn *src,
1097 struct bpf_insn *dst,
1098 struct bpf_prog *prog,
1101 u64 bpf_event_output(struct bpf_map *map, u64 flags, void *meta, u64 meta_size,
1102 void *ctx, u64 ctx_size, bpf_ctx_copy_t ctx_copy);
1104 /* an array of programs to be executed under rcu_lock.
1107 * ret = BPF_PROG_RUN_ARRAY(&bpf_prog_array, ctx, bpf_prog_run);
1109 * the structure returned by bpf_prog_array_alloc() should be populated
1110 * with program pointers and the last pointer must be NULL.
1111 * The user has to keep refcnt on the program and make sure the program
1112 * is removed from the array before bpf_prog_put().
1113 * The 'struct bpf_prog_array *' should only be replaced with xchg()
1114 * since other cpus are walking the array of pointers in parallel.
1116 struct bpf_prog_array_item {
1117 struct bpf_prog *prog;
1119 struct bpf_cgroup_storage *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE];
1124 struct bpf_prog_array {
1125 struct rcu_head rcu;
1126 struct bpf_prog_array_item items[];
1129 struct bpf_prog_array *bpf_prog_array_alloc(u32 prog_cnt, gfp_t flags);
1130 void bpf_prog_array_free(struct bpf_prog_array *progs);
1131 int bpf_prog_array_length(struct bpf_prog_array *progs);
1132 bool bpf_prog_array_is_empty(struct bpf_prog_array *array);
1133 int bpf_prog_array_copy_to_user(struct bpf_prog_array *progs,
1134 __u32 __user *prog_ids, u32 cnt);
1136 void bpf_prog_array_delete_safe(struct bpf_prog_array *progs,
1137 struct bpf_prog *old_prog);
1138 int bpf_prog_array_delete_safe_at(struct bpf_prog_array *array, int index);
1139 int bpf_prog_array_update_at(struct bpf_prog_array *array, int index,
1140 struct bpf_prog *prog);
1141 int bpf_prog_array_copy_info(struct bpf_prog_array *array,
1142 u32 *prog_ids, u32 request_cnt,
1144 int bpf_prog_array_copy(struct bpf_prog_array *old_array,
1145 struct bpf_prog *exclude_prog,
1146 struct bpf_prog *include_prog,
1148 struct bpf_prog_array **new_array);
1150 struct bpf_run_ctx {};
1152 struct bpf_cg_run_ctx {
1153 struct bpf_run_ctx run_ctx;
1154 const struct bpf_prog_array_item *prog_item;
1157 struct bpf_trace_run_ctx {
1158 struct bpf_run_ctx run_ctx;
1162 static inline struct bpf_run_ctx *bpf_set_run_ctx(struct bpf_run_ctx *new_ctx)
1164 struct bpf_run_ctx *old_ctx = NULL;
1166 #ifdef CONFIG_BPF_SYSCALL
1167 old_ctx = current->bpf_ctx;
1168 current->bpf_ctx = new_ctx;
1173 static inline void bpf_reset_run_ctx(struct bpf_run_ctx *old_ctx)
1175 #ifdef CONFIG_BPF_SYSCALL
1176 current->bpf_ctx = old_ctx;
1180 /* BPF program asks to bypass CAP_NET_BIND_SERVICE in bind. */
1181 #define BPF_RET_BIND_NO_CAP_NET_BIND_SERVICE (1 << 0)
1182 /* BPF program asks to set CN on the packet. */
1183 #define BPF_RET_SET_CN (1 << 0)
1185 typedef u32 (*bpf_prog_run_fn)(const struct bpf_prog *prog, const void *ctx);
1187 static __always_inline u32
1188 BPF_PROG_RUN_ARRAY_CG_FLAGS(const struct bpf_prog_array __rcu *array_rcu,
1189 const void *ctx, bpf_prog_run_fn run_prog,
1192 const struct bpf_prog_array_item *item;
1193 const struct bpf_prog *prog;
1194 const struct bpf_prog_array *array;
1195 struct bpf_run_ctx *old_run_ctx;
1196 struct bpf_cg_run_ctx run_ctx;
1202 array = rcu_dereference(array_rcu);
1203 item = &array->items[0];
1204 old_run_ctx = bpf_set_run_ctx(&run_ctx.run_ctx);
1205 while ((prog = READ_ONCE(item->prog))) {
1206 run_ctx.prog_item = item;
1207 func_ret = run_prog(prog, ctx);
1208 ret &= (func_ret & 1);
1209 *(ret_flags) |= (func_ret >> 1);
1212 bpf_reset_run_ctx(old_run_ctx);
1218 static __always_inline u32
1219 BPF_PROG_RUN_ARRAY_CG(const struct bpf_prog_array __rcu *array_rcu,
1220 const void *ctx, bpf_prog_run_fn run_prog)
1222 const struct bpf_prog_array_item *item;
1223 const struct bpf_prog *prog;
1224 const struct bpf_prog_array *array;
1225 struct bpf_run_ctx *old_run_ctx;
1226 struct bpf_cg_run_ctx run_ctx;
1231 array = rcu_dereference(array_rcu);
1232 item = &array->items[0];
1233 old_run_ctx = bpf_set_run_ctx(&run_ctx.run_ctx);
1234 while ((prog = READ_ONCE(item->prog))) {
1235 run_ctx.prog_item = item;
1236 ret &= run_prog(prog, ctx);
1239 bpf_reset_run_ctx(old_run_ctx);
1245 static __always_inline u32
1246 BPF_PROG_RUN_ARRAY(const struct bpf_prog_array __rcu *array_rcu,
1247 const void *ctx, bpf_prog_run_fn run_prog)
1249 const struct bpf_prog_array_item *item;
1250 const struct bpf_prog *prog;
1251 const struct bpf_prog_array *array;
1252 struct bpf_run_ctx *old_run_ctx;
1253 struct bpf_trace_run_ctx run_ctx;
1258 array = rcu_dereference(array_rcu);
1259 if (unlikely(!array))
1261 old_run_ctx = bpf_set_run_ctx(&run_ctx.run_ctx);
1262 item = &array->items[0];
1263 while ((prog = READ_ONCE(item->prog))) {
1264 run_ctx.bpf_cookie = item->bpf_cookie;
1265 ret &= run_prog(prog, ctx);
1268 bpf_reset_run_ctx(old_run_ctx);
1275 /* To be used by __cgroup_bpf_run_filter_skb for EGRESS BPF progs
1276 * so BPF programs can request cwr for TCP packets.
1278 * Current cgroup skb programs can only return 0 or 1 (0 to drop the
1279 * packet. This macro changes the behavior so the low order bit
1280 * indicates whether the packet should be dropped (0) or not (1)
1281 * and the next bit is a congestion notification bit. This could be
1282 * used by TCP to call tcp_enter_cwr()
1284 * Hence, new allowed return values of CGROUP EGRESS BPF programs are:
1287 * 2: drop packet and cn
1288 * 3: keep packet and cn
1290 * This macro then converts it to one of the NET_XMIT or an error
1291 * code that is then interpreted as drop packet (and no cn):
1292 * 0: NET_XMIT_SUCCESS skb should be transmitted
1293 * 1: NET_XMIT_DROP skb should be dropped and cn
1294 * 2: NET_XMIT_CN skb should be transmitted and cn
1295 * 3: -EPERM skb should be dropped
1297 #define BPF_PROG_CGROUP_INET_EGRESS_RUN_ARRAY(array, ctx, func) \
1302 _ret = BPF_PROG_RUN_ARRAY_CG_FLAGS(array, ctx, func, &_flags); \
1303 _cn = _flags & BPF_RET_SET_CN; \
1305 _ret = (_cn ? NET_XMIT_CN : NET_XMIT_SUCCESS); \
1307 _ret = (_cn ? NET_XMIT_DROP : -EPERM); \
1311 #ifdef CONFIG_BPF_SYSCALL
1312 DECLARE_PER_CPU(int, bpf_prog_active);
1313 extern struct mutex bpf_stats_enabled_mutex;
1316 * Block execution of BPF programs attached to instrumentation (perf,
1317 * kprobes, tracepoints) to prevent deadlocks on map operations as any of
1318 * these events can happen inside a region which holds a map bucket lock
1319 * and can deadlock on it.
1321 * Use the preemption safe inc/dec variants on RT because migrate disable
1322 * is preemptible on RT and preemption in the middle of the RMW operation
1323 * might lead to inconsistent state. Use the raw variants for non RT
1324 * kernels as migrate_disable() maps to preempt_disable() so the slightly
1325 * more expensive save operation can be avoided.
1327 static inline void bpf_disable_instrumentation(void)
1330 if (IS_ENABLED(CONFIG_PREEMPT_RT))
1331 this_cpu_inc(bpf_prog_active);
1333 __this_cpu_inc(bpf_prog_active);
1336 static inline void bpf_enable_instrumentation(void)
1338 if (IS_ENABLED(CONFIG_PREEMPT_RT))
1339 this_cpu_dec(bpf_prog_active);
1341 __this_cpu_dec(bpf_prog_active);
1345 extern const struct file_operations bpf_map_fops;
1346 extern const struct file_operations bpf_prog_fops;
1347 extern const struct file_operations bpf_iter_fops;
1349 #define BPF_PROG_TYPE(_id, _name, prog_ctx_type, kern_ctx_type) \
1350 extern const struct bpf_prog_ops _name ## _prog_ops; \
1351 extern const struct bpf_verifier_ops _name ## _verifier_ops;
1352 #define BPF_MAP_TYPE(_id, _ops) \
1353 extern const struct bpf_map_ops _ops;
1354 #define BPF_LINK_TYPE(_id, _name)
1355 #include <linux/bpf_types.h>
1356 #undef BPF_PROG_TYPE
1358 #undef BPF_LINK_TYPE
1360 extern const struct bpf_prog_ops bpf_offload_prog_ops;
1361 extern const struct bpf_verifier_ops tc_cls_act_analyzer_ops;
1362 extern const struct bpf_verifier_ops xdp_analyzer_ops;
1364 struct bpf_prog *bpf_prog_get(u32 ufd);
1365 struct bpf_prog *bpf_prog_get_type_dev(u32 ufd, enum bpf_prog_type type,
1367 void bpf_prog_add(struct bpf_prog *prog, int i);
1368 void bpf_prog_sub(struct bpf_prog *prog, int i);
1369 void bpf_prog_inc(struct bpf_prog *prog);
1370 struct bpf_prog * __must_check bpf_prog_inc_not_zero(struct bpf_prog *prog);
1371 void bpf_prog_put(struct bpf_prog *prog);
1373 void bpf_prog_free_id(struct bpf_prog *prog, bool do_idr_lock);
1374 void bpf_map_free_id(struct bpf_map *map, bool do_idr_lock);
1376 struct bpf_map *bpf_map_get(u32 ufd);
1377 struct bpf_map *bpf_map_get_with_uref(u32 ufd);
1378 struct bpf_map *__bpf_map_get(struct fd f);
1379 void bpf_map_inc(struct bpf_map *map);
1380 void bpf_map_inc_with_uref(struct bpf_map *map);
1381 struct bpf_map * __must_check bpf_map_inc_not_zero(struct bpf_map *map);
1382 void bpf_map_put_with_uref(struct bpf_map *map);
1383 void bpf_map_put(struct bpf_map *map);
1384 void *bpf_map_area_alloc(u64 size, int numa_node);
1385 void *bpf_map_area_mmapable_alloc(u64 size, int numa_node);
1386 void bpf_map_area_free(void *base);
1387 void bpf_map_init_from_attr(struct bpf_map *map, union bpf_attr *attr);
1388 int generic_map_lookup_batch(struct bpf_map *map,
1389 const union bpf_attr *attr,
1390 union bpf_attr __user *uattr);
1391 int generic_map_update_batch(struct bpf_map *map,
1392 const union bpf_attr *attr,
1393 union bpf_attr __user *uattr);
1394 int generic_map_delete_batch(struct bpf_map *map,
1395 const union bpf_attr *attr,
1396 union bpf_attr __user *uattr);
1397 struct bpf_map *bpf_map_get_curr_or_next(u32 *id);
1398 struct bpf_prog *bpf_prog_get_curr_or_next(u32 *id);
1400 #ifdef CONFIG_MEMCG_KMEM
1401 void *bpf_map_kmalloc_node(const struct bpf_map *map, size_t size, gfp_t flags,
1403 void *bpf_map_kzalloc(const struct bpf_map *map, size_t size, gfp_t flags);
1404 void __percpu *bpf_map_alloc_percpu(const struct bpf_map *map, size_t size,
1405 size_t align, gfp_t flags);
1407 static inline void *
1408 bpf_map_kmalloc_node(const struct bpf_map *map, size_t size, gfp_t flags,
1411 return kmalloc_node(size, flags, node);
1414 static inline void *
1415 bpf_map_kzalloc(const struct bpf_map *map, size_t size, gfp_t flags)
1417 return kzalloc(size, flags);
1420 static inline void __percpu *
1421 bpf_map_alloc_percpu(const struct bpf_map *map, size_t size, size_t align,
1424 return __alloc_percpu_gfp(size, align, flags);
1428 extern int sysctl_unprivileged_bpf_disabled;
1430 static inline bool bpf_allow_ptr_leaks(void)
1432 return perfmon_capable();
1435 static inline bool bpf_allow_uninit_stack(void)
1437 return perfmon_capable();
1440 static inline bool bpf_allow_ptr_to_map_access(void)
1442 return perfmon_capable();
1445 static inline bool bpf_bypass_spec_v1(void)
1447 return perfmon_capable();
1450 static inline bool bpf_bypass_spec_v4(void)
1452 return perfmon_capable();
1455 int bpf_map_new_fd(struct bpf_map *map, int flags);
1456 int bpf_prog_new_fd(struct bpf_prog *prog);
1458 void bpf_link_init(struct bpf_link *link, enum bpf_link_type type,
1459 const struct bpf_link_ops *ops, struct bpf_prog *prog);
1460 int bpf_link_prime(struct bpf_link *link, struct bpf_link_primer *primer);
1461 int bpf_link_settle(struct bpf_link_primer *primer);
1462 void bpf_link_cleanup(struct bpf_link_primer *primer);
1463 void bpf_link_inc(struct bpf_link *link);
1464 void bpf_link_put(struct bpf_link *link);
1465 int bpf_link_new_fd(struct bpf_link *link);
1466 struct file *bpf_link_new_file(struct bpf_link *link, int *reserved_fd);
1467 struct bpf_link *bpf_link_get_from_fd(u32 ufd);
1469 int bpf_obj_pin_user(u32 ufd, const char __user *pathname);
1470 int bpf_obj_get_user(const char __user *pathname, int flags);
1472 #define BPF_ITER_FUNC_PREFIX "bpf_iter_"
1473 #define DEFINE_BPF_ITER_FUNC(target, args...) \
1474 extern int bpf_iter_ ## target(args); \
1475 int __init bpf_iter_ ## target(args) { return 0; }
1477 struct bpf_iter_aux_info {
1478 struct bpf_map *map;
1481 typedef int (*bpf_iter_attach_target_t)(struct bpf_prog *prog,
1482 union bpf_iter_link_info *linfo,
1483 struct bpf_iter_aux_info *aux);
1484 typedef void (*bpf_iter_detach_target_t)(struct bpf_iter_aux_info *aux);
1485 typedef void (*bpf_iter_show_fdinfo_t) (const struct bpf_iter_aux_info *aux,
1486 struct seq_file *seq);
1487 typedef int (*bpf_iter_fill_link_info_t)(const struct bpf_iter_aux_info *aux,
1488 struct bpf_link_info *info);
1489 typedef const struct bpf_func_proto *
1490 (*bpf_iter_get_func_proto_t)(enum bpf_func_id func_id,
1491 const struct bpf_prog *prog);
1493 enum bpf_iter_feature {
1494 BPF_ITER_RESCHED = BIT(0),
1497 #define BPF_ITER_CTX_ARG_MAX 2
1498 struct bpf_iter_reg {
1500 bpf_iter_attach_target_t attach_target;
1501 bpf_iter_detach_target_t detach_target;
1502 bpf_iter_show_fdinfo_t show_fdinfo;
1503 bpf_iter_fill_link_info_t fill_link_info;
1504 bpf_iter_get_func_proto_t get_func_proto;
1505 u32 ctx_arg_info_size;
1507 struct bpf_ctx_arg_aux ctx_arg_info[BPF_ITER_CTX_ARG_MAX];
1508 const struct bpf_iter_seq_info *seq_info;
1511 struct bpf_iter_meta {
1512 __bpf_md_ptr(struct seq_file *, seq);
1517 struct bpf_iter__bpf_map_elem {
1518 __bpf_md_ptr(struct bpf_iter_meta *, meta);
1519 __bpf_md_ptr(struct bpf_map *, map);
1520 __bpf_md_ptr(void *, key);
1521 __bpf_md_ptr(void *, value);
1524 int bpf_iter_reg_target(const struct bpf_iter_reg *reg_info);
1525 void bpf_iter_unreg_target(const struct bpf_iter_reg *reg_info);
1526 bool bpf_iter_prog_supported(struct bpf_prog *prog);
1527 const struct bpf_func_proto *
1528 bpf_iter_get_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog);
1529 int bpf_iter_link_attach(const union bpf_attr *attr, bpfptr_t uattr, struct bpf_prog *prog);
1530 int bpf_iter_new_fd(struct bpf_link *link);
1531 bool bpf_link_is_iter(struct bpf_link *link);
1532 struct bpf_prog *bpf_iter_get_info(struct bpf_iter_meta *meta, bool in_stop);
1533 int bpf_iter_run_prog(struct bpf_prog *prog, void *ctx);
1534 void bpf_iter_map_show_fdinfo(const struct bpf_iter_aux_info *aux,
1535 struct seq_file *seq);
1536 int bpf_iter_map_fill_link_info(const struct bpf_iter_aux_info *aux,
1537 struct bpf_link_info *info);
1539 int map_set_for_each_callback_args(struct bpf_verifier_env *env,
1540 struct bpf_func_state *caller,
1541 struct bpf_func_state *callee);
1543 int bpf_percpu_hash_copy(struct bpf_map *map, void *key, void *value);
1544 int bpf_percpu_array_copy(struct bpf_map *map, void *key, void *value);
1545 int bpf_percpu_hash_update(struct bpf_map *map, void *key, void *value,
1547 int bpf_percpu_array_update(struct bpf_map *map, void *key, void *value,
1550 int bpf_stackmap_copy(struct bpf_map *map, void *key, void *value);
1552 int bpf_fd_array_map_update_elem(struct bpf_map *map, struct file *map_file,
1553 void *key, void *value, u64 map_flags);
1554 int bpf_fd_array_map_lookup_elem(struct bpf_map *map, void *key, u32 *value);
1555 int bpf_fd_htab_map_update_elem(struct bpf_map *map, struct file *map_file,
1556 void *key, void *value, u64 map_flags);
1557 int bpf_fd_htab_map_lookup_elem(struct bpf_map *map, void *key, u32 *value);
1559 int bpf_get_file_flag(int flags);
1560 int bpf_check_uarg_tail_zero(bpfptr_t uaddr, size_t expected_size,
1561 size_t actual_size);
1563 /* memcpy that is used with 8-byte aligned pointers, power-of-8 size and
1564 * forced to use 'long' read/writes to try to atomically copy long counters.
1565 * Best-effort only. No barriers here, since it _will_ race with concurrent
1566 * updates from BPF programs. Called from bpf syscall and mostly used with
1567 * size 8 or 16 bytes, so ask compiler to inline it.
1569 static inline void bpf_long_memcpy(void *dst, const void *src, u32 size)
1571 const long *lsrc = src;
1574 size /= sizeof(long);
1579 /* verify correctness of eBPF program */
1580 int bpf_check(struct bpf_prog **fp, union bpf_attr *attr, bpfptr_t uattr);
1582 #ifndef CONFIG_BPF_JIT_ALWAYS_ON
1583 void bpf_patch_call_args(struct bpf_insn *insn, u32 stack_depth);
1586 struct btf *bpf_get_btf_vmlinux(void);
1591 struct bpf_dtab_netdev;
1592 struct bpf_cpu_map_entry;
1594 void __dev_flush(void);
1595 int dev_xdp_enqueue(struct net_device *dev, struct xdp_buff *xdp,
1596 struct net_device *dev_rx);
1597 int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp,
1598 struct net_device *dev_rx);
1599 int dev_map_enqueue_multi(struct xdp_buff *xdp, struct net_device *dev_rx,
1600 struct bpf_map *map, bool exclude_ingress);
1601 int dev_map_generic_redirect(struct bpf_dtab_netdev *dst, struct sk_buff *skb,
1602 struct bpf_prog *xdp_prog);
1603 int dev_map_redirect_multi(struct net_device *dev, struct sk_buff *skb,
1604 struct bpf_prog *xdp_prog, struct bpf_map *map,
1605 bool exclude_ingress);
1607 void __cpu_map_flush(void);
1608 int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu, struct xdp_buff *xdp,
1609 struct net_device *dev_rx);
1610 int cpu_map_generic_redirect(struct bpf_cpu_map_entry *rcpu,
1611 struct sk_buff *skb);
1613 /* Return map's numa specified by userspace */
1614 static inline int bpf_map_attr_numa_node(const union bpf_attr *attr)
1616 return (attr->map_flags & BPF_F_NUMA_NODE) ?
1617 attr->numa_node : NUMA_NO_NODE;
1620 struct bpf_prog *bpf_prog_get_type_path(const char *name, enum bpf_prog_type type);
1621 int array_map_alloc_check(union bpf_attr *attr);
1623 int bpf_prog_test_run_xdp(struct bpf_prog *prog, const union bpf_attr *kattr,
1624 union bpf_attr __user *uattr);
1625 int bpf_prog_test_run_skb(struct bpf_prog *prog, const union bpf_attr *kattr,
1626 union bpf_attr __user *uattr);
1627 int bpf_prog_test_run_tracing(struct bpf_prog *prog,
1628 const union bpf_attr *kattr,
1629 union bpf_attr __user *uattr);
1630 int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog,
1631 const union bpf_attr *kattr,
1632 union bpf_attr __user *uattr);
1633 int bpf_prog_test_run_raw_tp(struct bpf_prog *prog,
1634 const union bpf_attr *kattr,
1635 union bpf_attr __user *uattr);
1636 int bpf_prog_test_run_sk_lookup(struct bpf_prog *prog,
1637 const union bpf_attr *kattr,
1638 union bpf_attr __user *uattr);
1639 bool bpf_prog_test_check_kfunc_call(u32 kfunc_id);
1640 bool btf_ctx_access(int off, int size, enum bpf_access_type type,
1641 const struct bpf_prog *prog,
1642 struct bpf_insn_access_aux *info);
1643 int btf_struct_access(struct bpf_verifier_log *log, const struct btf *btf,
1644 const struct btf_type *t, int off, int size,
1645 enum bpf_access_type atype,
1647 bool btf_struct_ids_match(struct bpf_verifier_log *log,
1648 const struct btf *btf, u32 id, int off,
1649 const struct btf *need_btf, u32 need_type_id);
1651 int btf_distill_func_proto(struct bpf_verifier_log *log,
1653 const struct btf_type *func_proto,
1654 const char *func_name,
1655 struct btf_func_model *m);
1657 struct bpf_reg_state;
1658 int btf_check_subprog_arg_match(struct bpf_verifier_env *env, int subprog,
1659 struct bpf_reg_state *regs);
1660 int btf_check_kfunc_arg_match(struct bpf_verifier_env *env,
1661 const struct btf *btf, u32 func_id,
1662 struct bpf_reg_state *regs);
1663 int btf_prepare_func_args(struct bpf_verifier_env *env, int subprog,
1664 struct bpf_reg_state *reg);
1665 int btf_check_type_match(struct bpf_verifier_log *log, const struct bpf_prog *prog,
1666 struct btf *btf, const struct btf_type *t);
1668 struct bpf_prog *bpf_prog_by_id(u32 id);
1669 struct bpf_link *bpf_link_by_id(u32 id);
1671 const struct bpf_func_proto *bpf_base_func_proto(enum bpf_func_id func_id);
1672 void bpf_task_storage_free(struct task_struct *task);
1673 bool bpf_prog_has_kfunc_call(const struct bpf_prog *prog);
1674 const struct btf_func_model *
1675 bpf_jit_find_kfunc_model(const struct bpf_prog *prog,
1676 const struct bpf_insn *insn);
1677 #else /* !CONFIG_BPF_SYSCALL */
1678 static inline struct bpf_prog *bpf_prog_get(u32 ufd)
1680 return ERR_PTR(-EOPNOTSUPP);
1683 static inline struct bpf_prog *bpf_prog_get_type_dev(u32 ufd,
1684 enum bpf_prog_type type,
1687 return ERR_PTR(-EOPNOTSUPP);
1690 static inline void bpf_prog_add(struct bpf_prog *prog, int i)
1694 static inline void bpf_prog_sub(struct bpf_prog *prog, int i)
1698 static inline void bpf_prog_put(struct bpf_prog *prog)
1702 static inline void bpf_prog_inc(struct bpf_prog *prog)
1706 static inline struct bpf_prog *__must_check
1707 bpf_prog_inc_not_zero(struct bpf_prog *prog)
1709 return ERR_PTR(-EOPNOTSUPP);
1712 static inline void bpf_link_init(struct bpf_link *link, enum bpf_link_type type,
1713 const struct bpf_link_ops *ops,
1714 struct bpf_prog *prog)
1718 static inline int bpf_link_prime(struct bpf_link *link,
1719 struct bpf_link_primer *primer)
1724 static inline int bpf_link_settle(struct bpf_link_primer *primer)
1729 static inline void bpf_link_cleanup(struct bpf_link_primer *primer)
1733 static inline void bpf_link_inc(struct bpf_link *link)
1737 static inline void bpf_link_put(struct bpf_link *link)
1741 static inline int bpf_obj_get_user(const char __user *pathname, int flags)
1746 static inline bool dev_map_can_have_prog(struct bpf_map *map)
1751 static inline void __dev_flush(void)
1756 struct bpf_dtab_netdev;
1757 struct bpf_cpu_map_entry;
1760 int dev_xdp_enqueue(struct net_device *dev, struct xdp_buff *xdp,
1761 struct net_device *dev_rx)
1767 int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp,
1768 struct net_device *dev_rx)
1774 int dev_map_enqueue_multi(struct xdp_buff *xdp, struct net_device *dev_rx,
1775 struct bpf_map *map, bool exclude_ingress)
1782 static inline int dev_map_generic_redirect(struct bpf_dtab_netdev *dst,
1783 struct sk_buff *skb,
1784 struct bpf_prog *xdp_prog)
1790 int dev_map_redirect_multi(struct net_device *dev, struct sk_buff *skb,
1791 struct bpf_prog *xdp_prog, struct bpf_map *map,
1792 bool exclude_ingress)
1797 static inline void __cpu_map_flush(void)
1801 static inline int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu,
1802 struct xdp_buff *xdp,
1803 struct net_device *dev_rx)
1808 static inline int cpu_map_generic_redirect(struct bpf_cpu_map_entry *rcpu,
1809 struct sk_buff *skb)
1814 static inline bool cpu_map_prog_allowed(struct bpf_map *map)
1819 static inline struct bpf_prog *bpf_prog_get_type_path(const char *name,
1820 enum bpf_prog_type type)
1822 return ERR_PTR(-EOPNOTSUPP);
1825 static inline int bpf_prog_test_run_xdp(struct bpf_prog *prog,
1826 const union bpf_attr *kattr,
1827 union bpf_attr __user *uattr)
1832 static inline int bpf_prog_test_run_skb(struct bpf_prog *prog,
1833 const union bpf_attr *kattr,
1834 union bpf_attr __user *uattr)
1839 static inline int bpf_prog_test_run_tracing(struct bpf_prog *prog,
1840 const union bpf_attr *kattr,
1841 union bpf_attr __user *uattr)
1846 static inline int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog,
1847 const union bpf_attr *kattr,
1848 union bpf_attr __user *uattr)
1853 static inline int bpf_prog_test_run_sk_lookup(struct bpf_prog *prog,
1854 const union bpf_attr *kattr,
1855 union bpf_attr __user *uattr)
1860 static inline bool bpf_prog_test_check_kfunc_call(u32 kfunc_id)
1865 static inline void bpf_map_put(struct bpf_map *map)
1869 static inline struct bpf_prog *bpf_prog_by_id(u32 id)
1871 return ERR_PTR(-ENOTSUPP);
1874 static inline const struct bpf_func_proto *
1875 bpf_base_func_proto(enum bpf_func_id func_id)
1880 static inline void bpf_task_storage_free(struct task_struct *task)
1884 static inline bool bpf_prog_has_kfunc_call(const struct bpf_prog *prog)
1889 static inline const struct btf_func_model *
1890 bpf_jit_find_kfunc_model(const struct bpf_prog *prog,
1891 const struct bpf_insn *insn)
1895 #endif /* CONFIG_BPF_SYSCALL */
1897 void __bpf_free_used_btfs(struct bpf_prog_aux *aux,
1898 struct btf_mod_pair *used_btfs, u32 len);
1900 static inline struct bpf_prog *bpf_prog_get_type(u32 ufd,
1901 enum bpf_prog_type type)
1903 return bpf_prog_get_type_dev(ufd, type, false);
1906 void __bpf_free_used_maps(struct bpf_prog_aux *aux,
1907 struct bpf_map **used_maps, u32 len);
1909 bool bpf_prog_get_ok(struct bpf_prog *, enum bpf_prog_type *, bool);
1911 int bpf_prog_offload_compile(struct bpf_prog *prog);
1912 void bpf_prog_offload_destroy(struct bpf_prog *prog);
1913 int bpf_prog_offload_info_fill(struct bpf_prog_info *info,
1914 struct bpf_prog *prog);
1916 int bpf_map_offload_info_fill(struct bpf_map_info *info, struct bpf_map *map);
1918 int bpf_map_offload_lookup_elem(struct bpf_map *map, void *key, void *value);
1919 int bpf_map_offload_update_elem(struct bpf_map *map,
1920 void *key, void *value, u64 flags);
1921 int bpf_map_offload_delete_elem(struct bpf_map *map, void *key);
1922 int bpf_map_offload_get_next_key(struct bpf_map *map,
1923 void *key, void *next_key);
1925 bool bpf_offload_prog_map_match(struct bpf_prog *prog, struct bpf_map *map);
1927 struct bpf_offload_dev *
1928 bpf_offload_dev_create(const struct bpf_prog_offload_ops *ops, void *priv);
1929 void bpf_offload_dev_destroy(struct bpf_offload_dev *offdev);
1930 void *bpf_offload_dev_priv(struct bpf_offload_dev *offdev);
1931 int bpf_offload_dev_netdev_register(struct bpf_offload_dev *offdev,
1932 struct net_device *netdev);
1933 void bpf_offload_dev_netdev_unregister(struct bpf_offload_dev *offdev,
1934 struct net_device *netdev);
1935 bool bpf_offload_dev_match(struct bpf_prog *prog, struct net_device *netdev);
1937 #if defined(CONFIG_NET) && defined(CONFIG_BPF_SYSCALL)
1938 int bpf_prog_offload_init(struct bpf_prog *prog, union bpf_attr *attr);
1940 static inline bool bpf_prog_is_dev_bound(const struct bpf_prog_aux *aux)
1942 return aux->offload_requested;
1945 static inline bool bpf_map_is_dev_bound(struct bpf_map *map)
1947 return unlikely(map->ops == &bpf_map_offload_ops);
1950 struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr);
1951 void bpf_map_offload_map_free(struct bpf_map *map);
1952 int bpf_prog_test_run_syscall(struct bpf_prog *prog,
1953 const union bpf_attr *kattr,
1954 union bpf_attr __user *uattr);
1956 int sock_map_get_from_fd(const union bpf_attr *attr, struct bpf_prog *prog);
1957 int sock_map_prog_detach(const union bpf_attr *attr, enum bpf_prog_type ptype);
1958 int sock_map_update_elem_sys(struct bpf_map *map, void *key, void *value, u64 flags);
1959 void sock_map_unhash(struct sock *sk);
1960 void sock_map_close(struct sock *sk, long timeout);
1962 static inline int bpf_prog_offload_init(struct bpf_prog *prog,
1963 union bpf_attr *attr)
1968 static inline bool bpf_prog_is_dev_bound(struct bpf_prog_aux *aux)
1973 static inline bool bpf_map_is_dev_bound(struct bpf_map *map)
1978 static inline struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr)
1980 return ERR_PTR(-EOPNOTSUPP);
1983 static inline void bpf_map_offload_map_free(struct bpf_map *map)
1987 static inline int bpf_prog_test_run_syscall(struct bpf_prog *prog,
1988 const union bpf_attr *kattr,
1989 union bpf_attr __user *uattr)
1994 #ifdef CONFIG_BPF_SYSCALL
1995 static inline int sock_map_get_from_fd(const union bpf_attr *attr,
1996 struct bpf_prog *prog)
2001 static inline int sock_map_prog_detach(const union bpf_attr *attr,
2002 enum bpf_prog_type ptype)
2007 static inline int sock_map_update_elem_sys(struct bpf_map *map, void *key, void *value,
2012 #endif /* CONFIG_BPF_SYSCALL */
2013 #endif /* CONFIG_NET && CONFIG_BPF_SYSCALL */
2015 #if defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL)
2016 void bpf_sk_reuseport_detach(struct sock *sk);
2017 int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map, void *key,
2019 int bpf_fd_reuseport_array_update_elem(struct bpf_map *map, void *key,
2020 void *value, u64 map_flags);
2022 static inline void bpf_sk_reuseport_detach(struct sock *sk)
2026 #ifdef CONFIG_BPF_SYSCALL
2027 static inline int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map,
2028 void *key, void *value)
2033 static inline int bpf_fd_reuseport_array_update_elem(struct bpf_map *map,
2034 void *key, void *value,
2039 #endif /* CONFIG_BPF_SYSCALL */
2040 #endif /* defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL) */
2042 /* verifier prototypes for helper functions called from eBPF programs */
2043 extern const struct bpf_func_proto bpf_map_lookup_elem_proto;
2044 extern const struct bpf_func_proto bpf_map_update_elem_proto;
2045 extern const struct bpf_func_proto bpf_map_delete_elem_proto;
2046 extern const struct bpf_func_proto bpf_map_push_elem_proto;
2047 extern const struct bpf_func_proto bpf_map_pop_elem_proto;
2048 extern const struct bpf_func_proto bpf_map_peek_elem_proto;
2050 extern const struct bpf_func_proto bpf_get_prandom_u32_proto;
2051 extern const struct bpf_func_proto bpf_get_smp_processor_id_proto;
2052 extern const struct bpf_func_proto bpf_get_numa_node_id_proto;
2053 extern const struct bpf_func_proto bpf_tail_call_proto;
2054 extern const struct bpf_func_proto bpf_ktime_get_ns_proto;
2055 extern const struct bpf_func_proto bpf_ktime_get_boot_ns_proto;
2056 extern const struct bpf_func_proto bpf_get_current_pid_tgid_proto;
2057 extern const struct bpf_func_proto bpf_get_current_uid_gid_proto;
2058 extern const struct bpf_func_proto bpf_get_current_comm_proto;
2059 extern const struct bpf_func_proto bpf_get_stackid_proto;
2060 extern const struct bpf_func_proto bpf_get_stack_proto;
2061 extern const struct bpf_func_proto bpf_get_task_stack_proto;
2062 extern const struct bpf_func_proto bpf_get_stackid_proto_pe;
2063 extern const struct bpf_func_proto bpf_get_stack_proto_pe;
2064 extern const struct bpf_func_proto bpf_sock_map_update_proto;
2065 extern const struct bpf_func_proto bpf_sock_hash_update_proto;
2066 extern const struct bpf_func_proto bpf_get_current_cgroup_id_proto;
2067 extern const struct bpf_func_proto bpf_get_current_ancestor_cgroup_id_proto;
2068 extern const struct bpf_func_proto bpf_msg_redirect_hash_proto;
2069 extern const struct bpf_func_proto bpf_msg_redirect_map_proto;
2070 extern const struct bpf_func_proto bpf_sk_redirect_hash_proto;
2071 extern const struct bpf_func_proto bpf_sk_redirect_map_proto;
2072 extern const struct bpf_func_proto bpf_spin_lock_proto;
2073 extern const struct bpf_func_proto bpf_spin_unlock_proto;
2074 extern const struct bpf_func_proto bpf_get_local_storage_proto;
2075 extern const struct bpf_func_proto bpf_strtol_proto;
2076 extern const struct bpf_func_proto bpf_strtoul_proto;
2077 extern const struct bpf_func_proto bpf_tcp_sock_proto;
2078 extern const struct bpf_func_proto bpf_jiffies64_proto;
2079 extern const struct bpf_func_proto bpf_get_ns_current_pid_tgid_proto;
2080 extern const struct bpf_func_proto bpf_event_output_data_proto;
2081 extern const struct bpf_func_proto bpf_ringbuf_output_proto;
2082 extern const struct bpf_func_proto bpf_ringbuf_reserve_proto;
2083 extern const struct bpf_func_proto bpf_ringbuf_submit_proto;
2084 extern const struct bpf_func_proto bpf_ringbuf_discard_proto;
2085 extern const struct bpf_func_proto bpf_ringbuf_query_proto;
2086 extern const struct bpf_func_proto bpf_skc_to_tcp6_sock_proto;
2087 extern const struct bpf_func_proto bpf_skc_to_tcp_sock_proto;
2088 extern const struct bpf_func_proto bpf_skc_to_tcp_timewait_sock_proto;
2089 extern const struct bpf_func_proto bpf_skc_to_tcp_request_sock_proto;
2090 extern const struct bpf_func_proto bpf_skc_to_udp6_sock_proto;
2091 extern const struct bpf_func_proto bpf_copy_from_user_proto;
2092 extern const struct bpf_func_proto bpf_snprintf_btf_proto;
2093 extern const struct bpf_func_proto bpf_snprintf_proto;
2094 extern const struct bpf_func_proto bpf_per_cpu_ptr_proto;
2095 extern const struct bpf_func_proto bpf_this_cpu_ptr_proto;
2096 extern const struct bpf_func_proto bpf_ktime_get_coarse_ns_proto;
2097 extern const struct bpf_func_proto bpf_sock_from_file_proto;
2098 extern const struct bpf_func_proto bpf_get_socket_ptr_cookie_proto;
2099 extern const struct bpf_func_proto bpf_task_storage_get_proto;
2100 extern const struct bpf_func_proto bpf_task_storage_delete_proto;
2101 extern const struct bpf_func_proto bpf_for_each_map_elem_proto;
2102 extern const struct bpf_func_proto bpf_btf_find_by_name_kind_proto;
2103 extern const struct bpf_func_proto bpf_sk_setsockopt_proto;
2104 extern const struct bpf_func_proto bpf_sk_getsockopt_proto;
2106 const struct bpf_func_proto *tracing_prog_func_proto(
2107 enum bpf_func_id func_id, const struct bpf_prog *prog);
2109 /* Shared helpers among cBPF and eBPF. */
2110 void bpf_user_rnd_init_once(void);
2111 u64 bpf_user_rnd_u32(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
2112 u64 bpf_get_raw_cpu_id(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
2114 #if defined(CONFIG_NET)
2115 bool bpf_sock_common_is_valid_access(int off, int size,
2116 enum bpf_access_type type,
2117 struct bpf_insn_access_aux *info);
2118 bool bpf_sock_is_valid_access(int off, int size, enum bpf_access_type type,
2119 struct bpf_insn_access_aux *info);
2120 u32 bpf_sock_convert_ctx_access(enum bpf_access_type type,
2121 const struct bpf_insn *si,
2122 struct bpf_insn *insn_buf,
2123 struct bpf_prog *prog,
2126 static inline bool bpf_sock_common_is_valid_access(int off, int size,
2127 enum bpf_access_type type,
2128 struct bpf_insn_access_aux *info)
2132 static inline bool bpf_sock_is_valid_access(int off, int size,
2133 enum bpf_access_type type,
2134 struct bpf_insn_access_aux *info)
2138 static inline u32 bpf_sock_convert_ctx_access(enum bpf_access_type type,
2139 const struct bpf_insn *si,
2140 struct bpf_insn *insn_buf,
2141 struct bpf_prog *prog,
2149 struct sk_reuseport_kern {
2150 struct sk_buff *skb;
2152 struct sock *selected_sk;
2153 struct sock *migrating_sk;
2159 bool bpf_tcp_sock_is_valid_access(int off, int size, enum bpf_access_type type,
2160 struct bpf_insn_access_aux *info);
2162 u32 bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type,
2163 const struct bpf_insn *si,
2164 struct bpf_insn *insn_buf,
2165 struct bpf_prog *prog,
2168 bool bpf_xdp_sock_is_valid_access(int off, int size, enum bpf_access_type type,
2169 struct bpf_insn_access_aux *info);
2171 u32 bpf_xdp_sock_convert_ctx_access(enum bpf_access_type type,
2172 const struct bpf_insn *si,
2173 struct bpf_insn *insn_buf,
2174 struct bpf_prog *prog,
2177 static inline bool bpf_tcp_sock_is_valid_access(int off, int size,
2178 enum bpf_access_type type,
2179 struct bpf_insn_access_aux *info)
2184 static inline u32 bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type,
2185 const struct bpf_insn *si,
2186 struct bpf_insn *insn_buf,
2187 struct bpf_prog *prog,
2192 static inline bool bpf_xdp_sock_is_valid_access(int off, int size,
2193 enum bpf_access_type type,
2194 struct bpf_insn_access_aux *info)
2199 static inline u32 bpf_xdp_sock_convert_ctx_access(enum bpf_access_type type,
2200 const struct bpf_insn *si,
2201 struct bpf_insn *insn_buf,
2202 struct bpf_prog *prog,
2207 #endif /* CONFIG_INET */
2209 enum bpf_text_poke_type {
2214 int bpf_arch_text_poke(void *ip, enum bpf_text_poke_type t,
2215 void *addr1, void *addr2);
2218 bool btf_id_set_contains(const struct btf_id_set *set, u32 id);
2220 int bpf_bprintf_prepare(char *fmt, u32 fmt_size, const u64 *raw_args,
2221 u32 **bin_buf, u32 num_args);
2222 void bpf_bprintf_cleanup(void);
2224 #endif /* _LINUX_BPF_H */