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 */
174 u32 btf_value_type_id;
176 #ifdef CONFIG_MEMCG_KMEM
177 struct mem_cgroup *memcg;
179 char name[BPF_OBJ_NAME_LEN];
180 u32 btf_vmlinux_value_type_id;
182 bool frozen; /* write-once; write-protected by freeze_mutex */
185 /* The 3rd and 4th cacheline with misc members to avoid false sharing
186 * particularly with refcounting.
188 atomic64_t refcnt ____cacheline_aligned;
190 struct work_struct work;
191 struct mutex freeze_mutex;
192 u64 writecnt; /* writable mmap cnt; protected by freeze_mutex */
195 static inline bool map_value_has_spin_lock(const struct bpf_map *map)
197 return map->spin_lock_off >= 0;
200 static inline void check_and_init_map_lock(struct bpf_map *map, void *dst)
202 if (likely(!map_value_has_spin_lock(map)))
204 *(struct bpf_spin_lock *)(dst + map->spin_lock_off) =
205 (struct bpf_spin_lock){};
208 /* copy everything but bpf_spin_lock */
209 static inline void copy_map_value(struct bpf_map *map, void *dst, void *src)
211 if (unlikely(map_value_has_spin_lock(map))) {
212 u32 off = map->spin_lock_off;
214 memcpy(dst, src, off);
215 memcpy(dst + off + sizeof(struct bpf_spin_lock),
216 src + off + sizeof(struct bpf_spin_lock),
217 map->value_size - off - sizeof(struct bpf_spin_lock));
219 memcpy(dst, src, map->value_size);
222 void copy_map_value_locked(struct bpf_map *map, void *dst, void *src,
224 int bpf_obj_name_cpy(char *dst, const char *src, unsigned int size);
226 struct bpf_offload_dev;
227 struct bpf_offloaded_map;
229 struct bpf_map_dev_ops {
230 int (*map_get_next_key)(struct bpf_offloaded_map *map,
231 void *key, void *next_key);
232 int (*map_lookup_elem)(struct bpf_offloaded_map *map,
233 void *key, void *value);
234 int (*map_update_elem)(struct bpf_offloaded_map *map,
235 void *key, void *value, u64 flags);
236 int (*map_delete_elem)(struct bpf_offloaded_map *map, void *key);
239 struct bpf_offloaded_map {
241 struct net_device *netdev;
242 const struct bpf_map_dev_ops *dev_ops;
244 struct list_head offloads;
247 static inline struct bpf_offloaded_map *map_to_offmap(struct bpf_map *map)
249 return container_of(map, struct bpf_offloaded_map, map);
252 static inline bool bpf_map_offload_neutral(const struct bpf_map *map)
254 return map->map_type == BPF_MAP_TYPE_PERF_EVENT_ARRAY;
257 static inline bool bpf_map_support_seq_show(const struct bpf_map *map)
259 return (map->btf_value_type_id || map->btf_vmlinux_value_type_id) &&
260 map->ops->map_seq_show_elem;
263 int map_check_no_btf(const struct bpf_map *map,
264 const struct btf *btf,
265 const struct btf_type *key_type,
266 const struct btf_type *value_type);
268 bool bpf_map_meta_equal(const struct bpf_map *meta0,
269 const struct bpf_map *meta1);
271 extern const struct bpf_map_ops bpf_map_offload_ops;
273 /* function argument constraints */
275 ARG_DONTCARE = 0, /* unused argument in helper function */
277 /* the following constraints used to prototype
278 * bpf_map_lookup/update/delete_elem() functions
280 ARG_CONST_MAP_PTR, /* const argument used as pointer to bpf_map */
281 ARG_PTR_TO_MAP_KEY, /* pointer to stack used as map key */
282 ARG_PTR_TO_MAP_VALUE, /* pointer to stack used as map value */
283 ARG_PTR_TO_UNINIT_MAP_VALUE, /* pointer to valid memory used to store a map value */
284 ARG_PTR_TO_MAP_VALUE_OR_NULL, /* pointer to stack used as map value or NULL */
286 /* the following constraints used to prototype bpf_memcmp() and other
287 * functions that access data on eBPF program stack
289 ARG_PTR_TO_MEM, /* pointer to valid memory (stack, packet, map value) */
290 ARG_PTR_TO_MEM_OR_NULL, /* pointer to valid memory or NULL */
291 ARG_PTR_TO_UNINIT_MEM, /* pointer to memory does not need to be initialized,
292 * helper function must fill all bytes or clear
293 * them in error case.
296 ARG_CONST_SIZE, /* number of bytes accessed from memory */
297 ARG_CONST_SIZE_OR_ZERO, /* number of bytes accessed from memory or 0 */
299 ARG_PTR_TO_CTX, /* pointer to context */
300 ARG_PTR_TO_CTX_OR_NULL, /* pointer to context or NULL */
301 ARG_ANYTHING, /* any (initialized) argument is ok */
302 ARG_PTR_TO_SPIN_LOCK, /* pointer to bpf_spin_lock */
303 ARG_PTR_TO_SOCK_COMMON, /* pointer to sock_common */
304 ARG_PTR_TO_INT, /* pointer to int */
305 ARG_PTR_TO_LONG, /* pointer to long */
306 ARG_PTR_TO_SOCKET, /* pointer to bpf_sock (fullsock) */
307 ARG_PTR_TO_SOCKET_OR_NULL, /* pointer to bpf_sock (fullsock) or NULL */
308 ARG_PTR_TO_BTF_ID, /* pointer to in-kernel struct */
309 ARG_PTR_TO_ALLOC_MEM, /* pointer to dynamically allocated memory */
310 ARG_PTR_TO_ALLOC_MEM_OR_NULL, /* pointer to dynamically allocated memory or NULL */
311 ARG_CONST_ALLOC_SIZE_OR_ZERO, /* number of allocated bytes requested */
312 ARG_PTR_TO_BTF_ID_SOCK_COMMON, /* pointer to in-kernel sock_common or bpf-mirrored bpf_sock */
313 ARG_PTR_TO_PERCPU_BTF_ID, /* pointer to in-kernel percpu type */
314 ARG_PTR_TO_FUNC, /* pointer to a bpf program function */
315 ARG_PTR_TO_STACK_OR_NULL, /* pointer to stack or NULL */
316 ARG_PTR_TO_CONST_STR, /* pointer to a null terminated read-only string */
320 /* type of values returned from helper functions */
321 enum bpf_return_type {
322 RET_INTEGER, /* function returns integer */
323 RET_VOID, /* function doesn't return anything */
324 RET_PTR_TO_MAP_VALUE, /* returns a pointer to map elem value */
325 RET_PTR_TO_MAP_VALUE_OR_NULL, /* returns a pointer to map elem value or NULL */
326 RET_PTR_TO_SOCKET_OR_NULL, /* returns a pointer to a socket or NULL */
327 RET_PTR_TO_TCP_SOCK_OR_NULL, /* returns a pointer to a tcp_sock or NULL */
328 RET_PTR_TO_SOCK_COMMON_OR_NULL, /* returns a pointer to a sock_common or NULL */
329 RET_PTR_TO_ALLOC_MEM_OR_NULL, /* returns a pointer to dynamically allocated memory or NULL */
330 RET_PTR_TO_BTF_ID_OR_NULL, /* returns a pointer to a btf_id or NULL */
331 RET_PTR_TO_MEM_OR_BTF_ID_OR_NULL, /* returns a pointer to a valid memory or a btf_id or NULL */
332 RET_PTR_TO_MEM_OR_BTF_ID, /* returns a pointer to a valid memory or a btf_id */
333 RET_PTR_TO_BTF_ID, /* returns a pointer to a btf_id */
336 /* eBPF function prototype used by verifier to allow BPF_CALLs from eBPF programs
337 * to in-kernel helper functions and for adjusting imm32 field in BPF_CALL
338 * instructions after verifying
340 struct bpf_func_proto {
341 u64 (*func)(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
344 enum bpf_return_type ret_type;
347 enum bpf_arg_type arg1_type;
348 enum bpf_arg_type arg2_type;
349 enum bpf_arg_type arg3_type;
350 enum bpf_arg_type arg4_type;
351 enum bpf_arg_type arg5_type;
353 enum bpf_arg_type arg_type[5];
365 int *ret_btf_id; /* return value btf_id */
366 bool (*allowed)(const struct bpf_prog *prog);
369 /* bpf_context is intentionally undefined structure. Pointer to bpf_context is
370 * the first argument to eBPF programs.
371 * For socket filters: 'struct bpf_context *' == 'struct sk_buff *'
375 enum bpf_access_type {
380 /* types of values stored in eBPF registers */
381 /* Pointer types represent:
384 * pointer + (u16) var
385 * pointer + (u16) var + imm
386 * if (range > 0) then [ptr, ptr + range - off) is safe to access
387 * if (id > 0) means that some 'var' was added
388 * if (off > 0) means that 'imm' was added
391 NOT_INIT = 0, /* nothing was written into register */
392 SCALAR_VALUE, /* reg doesn't contain a valid pointer */
393 PTR_TO_CTX, /* reg points to bpf_context */
394 CONST_PTR_TO_MAP, /* reg points to struct bpf_map */
395 PTR_TO_MAP_VALUE, /* reg points to map element value */
396 PTR_TO_MAP_VALUE_OR_NULL,/* points to map elem value or NULL */
397 PTR_TO_STACK, /* reg == frame_pointer + offset */
398 PTR_TO_PACKET_META, /* skb->data - meta_len */
399 PTR_TO_PACKET, /* reg points to skb->data */
400 PTR_TO_PACKET_END, /* skb->data + headlen */
401 PTR_TO_FLOW_KEYS, /* reg points to bpf_flow_keys */
402 PTR_TO_SOCKET, /* reg points to struct bpf_sock */
403 PTR_TO_SOCKET_OR_NULL, /* reg points to struct bpf_sock or NULL */
404 PTR_TO_SOCK_COMMON, /* reg points to sock_common */
405 PTR_TO_SOCK_COMMON_OR_NULL, /* reg points to sock_common or NULL */
406 PTR_TO_TCP_SOCK, /* reg points to struct tcp_sock */
407 PTR_TO_TCP_SOCK_OR_NULL, /* reg points to struct tcp_sock or NULL */
408 PTR_TO_TP_BUFFER, /* reg points to a writable raw tp's buffer */
409 PTR_TO_XDP_SOCK, /* reg points to struct xdp_sock */
410 /* PTR_TO_BTF_ID points to a kernel struct that does not need
411 * to be null checked by the BPF program. This does not imply the
412 * pointer is _not_ null and in practice this can easily be a null
413 * pointer when reading pointer chains. The assumption is program
414 * context will handle null pointer dereference typically via fault
415 * handling. The verifier must keep this in mind and can make no
416 * assumptions about null or non-null when doing branch analysis.
417 * Further, when passed into helpers the helpers can not, without
418 * additional context, assume the value is non-null.
421 /* PTR_TO_BTF_ID_OR_NULL points to a kernel struct that has not
422 * been checked for null. Used primarily to inform the verifier
423 * an explicit null check is required for this struct.
425 PTR_TO_BTF_ID_OR_NULL,
426 PTR_TO_MEM, /* reg points to valid memory region */
427 PTR_TO_MEM_OR_NULL, /* reg points to valid memory region or NULL */
428 PTR_TO_RDONLY_BUF, /* reg points to a readonly buffer */
429 PTR_TO_RDONLY_BUF_OR_NULL, /* reg points to a readonly buffer or NULL */
430 PTR_TO_RDWR_BUF, /* reg points to a read/write buffer */
431 PTR_TO_RDWR_BUF_OR_NULL, /* reg points to a read/write buffer or NULL */
432 PTR_TO_PERCPU_BTF_ID, /* reg points to a percpu kernel variable */
433 PTR_TO_FUNC, /* reg points to a bpf program function */
434 PTR_TO_MAP_KEY, /* reg points to a map element key */
438 /* The information passed from prog-specific *_is_valid_access
439 * back to the verifier.
441 struct bpf_insn_access_aux {
442 enum bpf_reg_type reg_type;
450 struct bpf_verifier_log *log; /* for verbose logs */
454 bpf_ctx_record_field_size(struct bpf_insn_access_aux *aux, u32 size)
456 aux->ctx_field_size = size;
459 struct bpf_prog_ops {
460 int (*test_run)(struct bpf_prog *prog, const union bpf_attr *kattr,
461 union bpf_attr __user *uattr);
464 struct bpf_verifier_ops {
465 /* return eBPF function prototype for verification */
466 const struct bpf_func_proto *
467 (*get_func_proto)(enum bpf_func_id func_id,
468 const struct bpf_prog *prog);
470 /* return true if 'size' wide access at offset 'off' within bpf_context
471 * with 'type' (read or write) is allowed
473 bool (*is_valid_access)(int off, int size, enum bpf_access_type type,
474 const struct bpf_prog *prog,
475 struct bpf_insn_access_aux *info);
476 int (*gen_prologue)(struct bpf_insn *insn, bool direct_write,
477 const struct bpf_prog *prog);
478 int (*gen_ld_abs)(const struct bpf_insn *orig,
479 struct bpf_insn *insn_buf);
480 u32 (*convert_ctx_access)(enum bpf_access_type type,
481 const struct bpf_insn *src,
482 struct bpf_insn *dst,
483 struct bpf_prog *prog, u32 *target_size);
484 int (*btf_struct_access)(struct bpf_verifier_log *log,
485 const struct btf *btf,
486 const struct btf_type *t, int off, int size,
487 enum bpf_access_type atype,
489 bool (*check_kfunc_call)(u32 kfunc_btf_id);
492 struct bpf_prog_offload_ops {
493 /* verifier basic callbacks */
494 int (*insn_hook)(struct bpf_verifier_env *env,
495 int insn_idx, int prev_insn_idx);
496 int (*finalize)(struct bpf_verifier_env *env);
497 /* verifier optimization callbacks (called after .finalize) */
498 int (*replace_insn)(struct bpf_verifier_env *env, u32 off,
499 struct bpf_insn *insn);
500 int (*remove_insns)(struct bpf_verifier_env *env, u32 off, u32 cnt);
501 /* program management callbacks */
502 int (*prepare)(struct bpf_prog *prog);
503 int (*translate)(struct bpf_prog *prog);
504 void (*destroy)(struct bpf_prog *prog);
507 struct bpf_prog_offload {
508 struct bpf_prog *prog;
509 struct net_device *netdev;
510 struct bpf_offload_dev *offdev;
512 struct list_head offloads;
519 enum bpf_cgroup_storage_type {
520 BPF_CGROUP_STORAGE_SHARED,
521 BPF_CGROUP_STORAGE_PERCPU,
522 __BPF_CGROUP_STORAGE_MAX
525 #define MAX_BPF_CGROUP_STORAGE_TYPE __BPF_CGROUP_STORAGE_MAX
527 /* The longest tracepoint has 12 args.
528 * See include/trace/bpf_probe.h
530 #define MAX_BPF_FUNC_ARGS 12
532 /* The maximum number of arguments passed through registers
533 * a single function may have.
535 #define MAX_BPF_FUNC_REG_ARGS 5
537 struct btf_func_model {
540 u8 arg_size[MAX_BPF_FUNC_ARGS];
543 /* Restore arguments before returning from trampoline to let original function
544 * continue executing. This flag is used for fentry progs when there are no
547 #define BPF_TRAMP_F_RESTORE_REGS BIT(0)
548 /* Call original function after fentry progs, but before fexit progs.
549 * Makes sense for fentry/fexit, normal calls and indirect calls.
551 #define BPF_TRAMP_F_CALL_ORIG BIT(1)
552 /* Skip current frame and return to parent. Makes sense for fentry/fexit
553 * programs only. Should not be used with normal calls and indirect calls.
555 #define BPF_TRAMP_F_SKIP_FRAME BIT(2)
557 /* Each call __bpf_prog_enter + call bpf_func + call __bpf_prog_exit is ~50
558 * bytes on x86. Pick a number to fit into BPF_IMAGE_SIZE / 2
560 #define BPF_MAX_TRAMP_PROGS 38
562 struct bpf_tramp_progs {
563 struct bpf_prog *progs[BPF_MAX_TRAMP_PROGS];
567 /* Different use cases for BPF trampoline:
568 * 1. replace nop at the function entry (kprobe equivalent)
569 * flags = BPF_TRAMP_F_RESTORE_REGS
570 * fentry = a set of programs to run before returning from trampoline
572 * 2. replace nop at the function entry (kprobe + kretprobe equivalent)
573 * flags = BPF_TRAMP_F_CALL_ORIG | BPF_TRAMP_F_SKIP_FRAME
574 * orig_call = fentry_ip + MCOUNT_INSN_SIZE
575 * fentry = a set of program to run before calling original function
576 * fexit = a set of program to run after original function
578 * 3. replace direct call instruction anywhere in the function body
579 * or assign a function pointer for indirect call (like tcp_congestion_ops->cong_avoid)
581 * fentry = a set of programs to run before returning from trampoline
582 * With flags = BPF_TRAMP_F_CALL_ORIG
583 * orig_call = original callback addr or direct function addr
584 * fentry = a set of program to run before calling original function
585 * fexit = a set of program to run after original function
587 struct bpf_tramp_image;
588 int arch_prepare_bpf_trampoline(struct bpf_tramp_image *tr, void *image, void *image_end,
589 const struct btf_func_model *m, u32 flags,
590 struct bpf_tramp_progs *tprogs,
592 /* these two functions are called from generated trampoline */
593 u64 notrace __bpf_prog_enter(struct bpf_prog *prog);
594 void notrace __bpf_prog_exit(struct bpf_prog *prog, u64 start);
595 u64 notrace __bpf_prog_enter_sleepable(struct bpf_prog *prog);
596 void notrace __bpf_prog_exit_sleepable(struct bpf_prog *prog, u64 start);
597 void notrace __bpf_tramp_enter(struct bpf_tramp_image *tr);
598 void notrace __bpf_tramp_exit(struct bpf_tramp_image *tr);
603 char name[KSYM_NAME_LEN];
604 struct list_head lnode;
605 struct latch_tree_node tnode;
609 enum bpf_tramp_prog_type {
612 BPF_TRAMP_MODIFY_RETURN,
614 BPF_TRAMP_REPLACE, /* more than MAX */
617 struct bpf_tramp_image {
619 struct bpf_ksym ksym;
620 struct percpu_ref pcref;
625 struct work_struct work;
629 struct bpf_trampoline {
630 /* hlist for trampoline_table */
631 struct hlist_node hlist;
632 /* serializes access to fields of this trampoline */
637 struct btf_func_model model;
641 /* if !NULL this is BPF_PROG_TYPE_EXT program that extends another BPF
642 * program by replacing one of its functions. func.addr is the address
643 * of the function it replaced.
645 struct bpf_prog *extension_prog;
646 /* list of BPF programs using this trampoline */
647 struct hlist_head progs_hlist[BPF_TRAMP_MAX];
648 /* Number of attached programs. A counter per kind. */
649 int progs_cnt[BPF_TRAMP_MAX];
650 /* Executable image of trampoline */
651 struct bpf_tramp_image *cur_image;
656 struct bpf_attach_target_info {
657 struct btf_func_model fmodel;
659 const char *tgt_name;
660 const struct btf_type *tgt_type;
663 #define BPF_DISPATCHER_MAX 48 /* Fits in 2048B */
665 struct bpf_dispatcher_prog {
666 struct bpf_prog *prog;
670 struct bpf_dispatcher {
671 /* dispatcher mutex */
674 struct bpf_dispatcher_prog progs[BPF_DISPATCHER_MAX];
678 struct bpf_ksym ksym;
681 static __always_inline __nocfi unsigned int bpf_dispatcher_nop_func(
683 const struct bpf_insn *insnsi,
684 unsigned int (*bpf_func)(const void *,
685 const struct bpf_insn *))
687 return bpf_func(ctx, insnsi);
689 #ifdef CONFIG_BPF_JIT
690 int bpf_trampoline_link_prog(struct bpf_prog *prog, struct bpf_trampoline *tr);
691 int bpf_trampoline_unlink_prog(struct bpf_prog *prog, struct bpf_trampoline *tr);
692 struct bpf_trampoline *bpf_trampoline_get(u64 key,
693 struct bpf_attach_target_info *tgt_info);
694 void bpf_trampoline_put(struct bpf_trampoline *tr);
695 #define BPF_DISPATCHER_INIT(_name) { \
696 .mutex = __MUTEX_INITIALIZER(_name.mutex), \
697 .func = &_name##_func, \
704 .lnode = LIST_HEAD_INIT(_name.ksym.lnode), \
708 #define DEFINE_BPF_DISPATCHER(name) \
709 noinline __nocfi unsigned int bpf_dispatcher_##name##_func( \
711 const struct bpf_insn *insnsi, \
712 unsigned int (*bpf_func)(const void *, \
713 const struct bpf_insn *)) \
715 return bpf_func(ctx, insnsi); \
717 EXPORT_SYMBOL(bpf_dispatcher_##name##_func); \
718 struct bpf_dispatcher bpf_dispatcher_##name = \
719 BPF_DISPATCHER_INIT(bpf_dispatcher_##name);
720 #define DECLARE_BPF_DISPATCHER(name) \
721 unsigned int bpf_dispatcher_##name##_func( \
723 const struct bpf_insn *insnsi, \
724 unsigned int (*bpf_func)(const void *, \
725 const struct bpf_insn *)); \
726 extern struct bpf_dispatcher bpf_dispatcher_##name;
727 #define BPF_DISPATCHER_FUNC(name) bpf_dispatcher_##name##_func
728 #define BPF_DISPATCHER_PTR(name) (&bpf_dispatcher_##name)
729 void bpf_dispatcher_change_prog(struct bpf_dispatcher *d, struct bpf_prog *from,
730 struct bpf_prog *to);
731 /* Called only from JIT-enabled code, so there's no need for stubs. */
732 void *bpf_jit_alloc_exec_page(void);
733 void bpf_image_ksym_add(void *data, struct bpf_ksym *ksym);
734 void bpf_image_ksym_del(struct bpf_ksym *ksym);
735 void bpf_ksym_add(struct bpf_ksym *ksym);
736 void bpf_ksym_del(struct bpf_ksym *ksym);
737 int bpf_jit_charge_modmem(u32 pages);
738 void bpf_jit_uncharge_modmem(u32 pages);
740 static inline int bpf_trampoline_link_prog(struct bpf_prog *prog,
741 struct bpf_trampoline *tr)
745 static inline int bpf_trampoline_unlink_prog(struct bpf_prog *prog,
746 struct bpf_trampoline *tr)
750 static inline struct bpf_trampoline *bpf_trampoline_get(u64 key,
751 struct bpf_attach_target_info *tgt_info)
753 return ERR_PTR(-EOPNOTSUPP);
755 static inline void bpf_trampoline_put(struct bpf_trampoline *tr) {}
756 #define DEFINE_BPF_DISPATCHER(name)
757 #define DECLARE_BPF_DISPATCHER(name)
758 #define BPF_DISPATCHER_FUNC(name) bpf_dispatcher_nop_func
759 #define BPF_DISPATCHER_PTR(name) NULL
760 static inline void bpf_dispatcher_change_prog(struct bpf_dispatcher *d,
761 struct bpf_prog *from,
762 struct bpf_prog *to) {}
763 static inline bool is_bpf_image_address(unsigned long address)
769 struct bpf_func_info_aux {
774 enum bpf_jit_poke_reason {
775 BPF_POKE_REASON_TAIL_CALL,
778 /* Descriptor of pokes pointing /into/ the JITed image. */
779 struct bpf_jit_poke_descriptor {
780 void *tailcall_target;
781 void *tailcall_bypass;
789 bool tailcall_target_stable;
795 /* reg_type info for ctx arguments */
796 struct bpf_ctx_arg_aux {
798 enum bpf_reg_type reg_type;
802 struct btf_mod_pair {
804 struct module *module;
807 struct bpf_kfunc_desc_tab;
809 struct bpf_prog_aux {
818 u32 func_cnt; /* used by non-func prog as the number of func progs */
819 u32 func_idx; /* 0 for non-func prog, the index in func array for func prog */
820 u32 attach_btf_id; /* in-kernel BTF type id to attach to */
821 u32 ctx_arg_info_size;
822 u32 max_rdonly_access;
824 struct btf *attach_btf;
825 const struct bpf_ctx_arg_aux *ctx_arg_info;
826 struct mutex dst_mutex; /* protects dst_* pointers below, *after* prog becomes visible */
827 struct bpf_prog *dst_prog;
828 struct bpf_trampoline *dst_trampoline;
829 enum bpf_prog_type saved_dst_prog_type;
830 enum bpf_attach_type saved_dst_attach_type;
831 bool verifier_zext; /* Zero extensions has been inserted by verifier. */
832 bool offload_requested;
833 bool attach_btf_trace; /* true if attaching to BTF-enabled raw tp */
834 bool func_proto_unreliable;
836 bool tail_call_reachable;
837 struct hlist_node tramp_hlist;
838 /* BTF_KIND_FUNC_PROTO for valid attach_btf_id */
839 const struct btf_type *attach_func_proto;
840 /* function name for valid attach_btf_id */
841 const char *attach_func_name;
842 struct bpf_prog **func;
843 void *jit_data; /* JIT specific data. arch dependent */
844 struct bpf_jit_poke_descriptor *poke_tab;
845 struct bpf_kfunc_desc_tab *kfunc_tab;
847 struct bpf_ksym ksym;
848 const struct bpf_prog_ops *ops;
849 struct bpf_map **used_maps;
850 struct mutex used_maps_mutex; /* mutex for used_maps and used_map_cnt */
851 struct btf_mod_pair *used_btfs;
852 struct bpf_prog *prog;
853 struct user_struct *user;
854 u64 load_time; /* ns since boottime */
855 struct bpf_map *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE];
856 char name[BPF_OBJ_NAME_LEN];
857 #ifdef CONFIG_SECURITY
860 struct bpf_prog_offload *offload;
862 struct bpf_func_info *func_info;
863 struct bpf_func_info_aux *func_info_aux;
864 /* bpf_line_info loaded from userspace. linfo->insn_off
865 * has the xlated insn offset.
866 * Both the main and sub prog share the same linfo.
867 * The subprog can access its first linfo by
868 * using the linfo_idx.
870 struct bpf_line_info *linfo;
871 /* jited_linfo is the jited addr of the linfo. It has a
872 * one to one mapping to linfo:
873 * jited_linfo[i] is the jited addr for the linfo[i]->insn_off.
874 * Both the main and sub prog share the same jited_linfo.
875 * The subprog can access its first jited_linfo by
876 * using the linfo_idx.
881 /* subprog can use linfo_idx to access its first linfo and
883 * main prog always has linfo_idx == 0
887 struct exception_table_entry *extable;
889 struct work_struct work;
894 struct bpf_array_aux {
895 /* 'Ownership' of prog array is claimed by the first program that
896 * is going to use this map or by the first program which FD is
897 * stored in the map to make sure that all callers and callees have
898 * the same prog type and JITed flag.
900 enum bpf_prog_type type;
902 /* Programs with direct jumps into programs part of this array. */
903 struct list_head poke_progs;
905 struct mutex poke_mutex;
906 struct work_struct work;
912 enum bpf_link_type type;
913 const struct bpf_link_ops *ops;
914 struct bpf_prog *prog;
915 struct work_struct work;
918 struct bpf_link_ops {
919 void (*release)(struct bpf_link *link);
920 void (*dealloc)(struct bpf_link *link);
921 int (*detach)(struct bpf_link *link);
922 int (*update_prog)(struct bpf_link *link, struct bpf_prog *new_prog,
923 struct bpf_prog *old_prog);
924 void (*show_fdinfo)(const struct bpf_link *link, struct seq_file *seq);
925 int (*fill_link_info)(const struct bpf_link *link,
926 struct bpf_link_info *info);
929 struct bpf_link_primer {
930 struct bpf_link *link;
936 struct bpf_struct_ops_value;
939 #define BPF_STRUCT_OPS_MAX_NR_MEMBERS 64
940 struct bpf_struct_ops {
941 const struct bpf_verifier_ops *verifier_ops;
942 int (*init)(struct btf *btf);
943 int (*check_member)(const struct btf_type *t,
944 const struct btf_member *member);
945 int (*init_member)(const struct btf_type *t,
946 const struct btf_member *member,
947 void *kdata, const void *udata);
948 int (*reg)(void *kdata);
949 void (*unreg)(void *kdata);
950 const struct btf_type *type;
951 const struct btf_type *value_type;
953 struct btf_func_model func_models[BPF_STRUCT_OPS_MAX_NR_MEMBERS];
958 #if defined(CONFIG_BPF_JIT) && defined(CONFIG_BPF_SYSCALL)
959 #define BPF_MODULE_OWNER ((void *)((0xeB9FUL << 2) + POISON_POINTER_DELTA))
960 const struct bpf_struct_ops *bpf_struct_ops_find(u32 type_id);
961 void bpf_struct_ops_init(struct btf *btf, struct bpf_verifier_log *log);
962 bool bpf_struct_ops_get(const void *kdata);
963 void bpf_struct_ops_put(const void *kdata);
964 int bpf_struct_ops_map_sys_lookup_elem(struct bpf_map *map, void *key,
966 static inline bool bpf_try_module_get(const void *data, struct module *owner)
968 if (owner == BPF_MODULE_OWNER)
969 return bpf_struct_ops_get(data);
971 return try_module_get(owner);
973 static inline void bpf_module_put(const void *data, struct module *owner)
975 if (owner == BPF_MODULE_OWNER)
976 bpf_struct_ops_put(data);
981 static inline const struct bpf_struct_ops *bpf_struct_ops_find(u32 type_id)
985 static inline void bpf_struct_ops_init(struct btf *btf,
986 struct bpf_verifier_log *log)
989 static inline bool bpf_try_module_get(const void *data, struct module *owner)
991 return try_module_get(owner);
993 static inline void bpf_module_put(const void *data, struct module *owner)
997 static inline int bpf_struct_ops_map_sys_lookup_elem(struct bpf_map *map,
1009 struct bpf_array_aux *aux;
1011 char value[0] __aligned(8);
1012 void *ptrs[0] __aligned(8);
1013 void __percpu *pptrs[0] __aligned(8);
1017 #define BPF_COMPLEXITY_LIMIT_INSNS 1000000 /* yes. 1M insns */
1018 #define MAX_TAIL_CALL_CNT 32
1020 #define BPF_F_ACCESS_MASK (BPF_F_RDONLY | \
1021 BPF_F_RDONLY_PROG | \
1025 #define BPF_MAP_CAN_READ BIT(0)
1026 #define BPF_MAP_CAN_WRITE BIT(1)
1028 static inline u32 bpf_map_flags_to_cap(struct bpf_map *map)
1030 u32 access_flags = map->map_flags & (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG);
1032 /* Combination of BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG is
1035 if (access_flags & BPF_F_RDONLY_PROG)
1036 return BPF_MAP_CAN_READ;
1037 else if (access_flags & BPF_F_WRONLY_PROG)
1038 return BPF_MAP_CAN_WRITE;
1040 return BPF_MAP_CAN_READ | BPF_MAP_CAN_WRITE;
1043 static inline bool bpf_map_flags_access_ok(u32 access_flags)
1045 return (access_flags & (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG)) !=
1046 (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG);
1049 struct bpf_event_entry {
1050 struct perf_event *event;
1051 struct file *perf_file;
1052 struct file *map_file;
1053 struct rcu_head rcu;
1056 bool bpf_prog_array_compatible(struct bpf_array *array, const struct bpf_prog *fp);
1057 int bpf_prog_calc_tag(struct bpf_prog *fp);
1059 const struct bpf_func_proto *bpf_get_trace_printk_proto(void);
1061 typedef unsigned long (*bpf_ctx_copy_t)(void *dst, const void *src,
1062 unsigned long off, unsigned long len);
1063 typedef u32 (*bpf_convert_ctx_access_t)(enum bpf_access_type type,
1064 const struct bpf_insn *src,
1065 struct bpf_insn *dst,
1066 struct bpf_prog *prog,
1069 u64 bpf_event_output(struct bpf_map *map, u64 flags, void *meta, u64 meta_size,
1070 void *ctx, u64 ctx_size, bpf_ctx_copy_t ctx_copy);
1072 /* an array of programs to be executed under rcu_lock.
1075 * ret = BPF_PROG_RUN_ARRAY(&bpf_prog_array, ctx, BPF_PROG_RUN);
1077 * the structure returned by bpf_prog_array_alloc() should be populated
1078 * with program pointers and the last pointer must be NULL.
1079 * The user has to keep refcnt on the program and make sure the program
1080 * is removed from the array before bpf_prog_put().
1081 * The 'struct bpf_prog_array *' should only be replaced with xchg()
1082 * since other cpus are walking the array of pointers in parallel.
1084 struct bpf_prog_array_item {
1085 struct bpf_prog *prog;
1086 struct bpf_cgroup_storage *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE];
1089 struct bpf_prog_array {
1090 struct rcu_head rcu;
1091 struct bpf_prog_array_item items[];
1094 struct bpf_prog_array *bpf_prog_array_alloc(u32 prog_cnt, gfp_t flags);
1095 void bpf_prog_array_free(struct bpf_prog_array *progs);
1096 int bpf_prog_array_length(struct bpf_prog_array *progs);
1097 bool bpf_prog_array_is_empty(struct bpf_prog_array *array);
1098 int bpf_prog_array_copy_to_user(struct bpf_prog_array *progs,
1099 __u32 __user *prog_ids, u32 cnt);
1101 void bpf_prog_array_delete_safe(struct bpf_prog_array *progs,
1102 struct bpf_prog *old_prog);
1103 int bpf_prog_array_delete_safe_at(struct bpf_prog_array *array, int index);
1104 int bpf_prog_array_update_at(struct bpf_prog_array *array, int index,
1105 struct bpf_prog *prog);
1106 int bpf_prog_array_copy_info(struct bpf_prog_array *array,
1107 u32 *prog_ids, u32 request_cnt,
1109 int bpf_prog_array_copy(struct bpf_prog_array *old_array,
1110 struct bpf_prog *exclude_prog,
1111 struct bpf_prog *include_prog,
1112 struct bpf_prog_array **new_array);
1114 /* BPF program asks to bypass CAP_NET_BIND_SERVICE in bind. */
1115 #define BPF_RET_BIND_NO_CAP_NET_BIND_SERVICE (1 << 0)
1116 /* BPF program asks to set CN on the packet. */
1117 #define BPF_RET_SET_CN (1 << 0)
1119 /* For BPF_PROG_RUN_ARRAY_FLAGS and __BPF_PROG_RUN_ARRAY,
1120 * if bpf_cgroup_storage_set() failed, the rest of programs
1121 * will not execute. This should be a really rare scenario
1122 * as it requires BPF_CGROUP_STORAGE_NEST_MAX number of
1123 * preemptions all between bpf_cgroup_storage_set() and
1124 * bpf_cgroup_storage_unset() on the same cpu.
1126 #define BPF_PROG_RUN_ARRAY_FLAGS(array, ctx, func, ret_flags) \
1128 struct bpf_prog_array_item *_item; \
1129 struct bpf_prog *_prog; \
1130 struct bpf_prog_array *_array; \
1133 migrate_disable(); \
1135 _array = rcu_dereference(array); \
1136 _item = &_array->items[0]; \
1137 while ((_prog = READ_ONCE(_item->prog))) { \
1138 if (unlikely(bpf_cgroup_storage_set(_item->cgroup_storage))) \
1140 func_ret = func(_prog, ctx); \
1141 _ret &= (func_ret & 1); \
1142 *(ret_flags) |= (func_ret >> 1); \
1143 bpf_cgroup_storage_unset(); \
1146 rcu_read_unlock(); \
1151 #define __BPF_PROG_RUN_ARRAY(array, ctx, func, check_non_null, set_cg_storage) \
1153 struct bpf_prog_array_item *_item; \
1154 struct bpf_prog *_prog; \
1155 struct bpf_prog_array *_array; \
1157 migrate_disable(); \
1159 _array = rcu_dereference(array); \
1160 if (unlikely(check_non_null && !_array))\
1162 _item = &_array->items[0]; \
1163 while ((_prog = READ_ONCE(_item->prog))) { \
1164 if (!set_cg_storage) { \
1165 _ret &= func(_prog, ctx); \
1167 if (unlikely(bpf_cgroup_storage_set(_item->cgroup_storage))) \
1169 _ret &= func(_prog, ctx); \
1170 bpf_cgroup_storage_unset(); \
1175 rcu_read_unlock(); \
1180 /* To be used by __cgroup_bpf_run_filter_skb for EGRESS BPF progs
1181 * so BPF programs can request cwr for TCP packets.
1183 * Current cgroup skb programs can only return 0 or 1 (0 to drop the
1184 * packet. This macro changes the behavior so the low order bit
1185 * indicates whether the packet should be dropped (0) or not (1)
1186 * and the next bit is a congestion notification bit. This could be
1187 * used by TCP to call tcp_enter_cwr()
1189 * Hence, new allowed return values of CGROUP EGRESS BPF programs are:
1192 * 2: drop packet and cn
1193 * 3: keep packet and cn
1195 * This macro then converts it to one of the NET_XMIT or an error
1196 * code that is then interpreted as drop packet (and no cn):
1197 * 0: NET_XMIT_SUCCESS skb should be transmitted
1198 * 1: NET_XMIT_DROP skb should be dropped and cn
1199 * 2: NET_XMIT_CN skb should be transmitted and cn
1200 * 3: -EPERM skb should be dropped
1202 #define BPF_PROG_CGROUP_INET_EGRESS_RUN_ARRAY(array, ctx, func) \
1207 _ret = BPF_PROG_RUN_ARRAY_FLAGS(array, ctx, func, &_flags); \
1208 _cn = _flags & BPF_RET_SET_CN; \
1210 _ret = (_cn ? NET_XMIT_CN : NET_XMIT_SUCCESS); \
1212 _ret = (_cn ? NET_XMIT_DROP : -EPERM); \
1216 #define BPF_PROG_RUN_ARRAY(array, ctx, func) \
1217 __BPF_PROG_RUN_ARRAY(array, ctx, func, false, true)
1219 #define BPF_PROG_RUN_ARRAY_CHECK(array, ctx, func) \
1220 __BPF_PROG_RUN_ARRAY(array, ctx, func, true, false)
1222 #ifdef CONFIG_BPF_SYSCALL
1223 DECLARE_PER_CPU(int, bpf_prog_active);
1224 extern struct mutex bpf_stats_enabled_mutex;
1227 * Block execution of BPF programs attached to instrumentation (perf,
1228 * kprobes, tracepoints) to prevent deadlocks on map operations as any of
1229 * these events can happen inside a region which holds a map bucket lock
1230 * and can deadlock on it.
1232 * Use the preemption safe inc/dec variants on RT because migrate disable
1233 * is preemptible on RT and preemption in the middle of the RMW operation
1234 * might lead to inconsistent state. Use the raw variants for non RT
1235 * kernels as migrate_disable() maps to preempt_disable() so the slightly
1236 * more expensive save operation can be avoided.
1238 static inline void bpf_disable_instrumentation(void)
1241 if (IS_ENABLED(CONFIG_PREEMPT_RT))
1242 this_cpu_inc(bpf_prog_active);
1244 __this_cpu_inc(bpf_prog_active);
1247 static inline void bpf_enable_instrumentation(void)
1249 if (IS_ENABLED(CONFIG_PREEMPT_RT))
1250 this_cpu_dec(bpf_prog_active);
1252 __this_cpu_dec(bpf_prog_active);
1256 extern const struct file_operations bpf_map_fops;
1257 extern const struct file_operations bpf_prog_fops;
1258 extern const struct file_operations bpf_iter_fops;
1260 #define BPF_PROG_TYPE(_id, _name, prog_ctx_type, kern_ctx_type) \
1261 extern const struct bpf_prog_ops _name ## _prog_ops; \
1262 extern const struct bpf_verifier_ops _name ## _verifier_ops;
1263 #define BPF_MAP_TYPE(_id, _ops) \
1264 extern const struct bpf_map_ops _ops;
1265 #define BPF_LINK_TYPE(_id, _name)
1266 #include <linux/bpf_types.h>
1267 #undef BPF_PROG_TYPE
1269 #undef BPF_LINK_TYPE
1271 extern const struct bpf_prog_ops bpf_offload_prog_ops;
1272 extern const struct bpf_verifier_ops tc_cls_act_analyzer_ops;
1273 extern const struct bpf_verifier_ops xdp_analyzer_ops;
1275 struct bpf_prog *bpf_prog_get(u32 ufd);
1276 struct bpf_prog *bpf_prog_get_type_dev(u32 ufd, enum bpf_prog_type type,
1278 void bpf_prog_add(struct bpf_prog *prog, int i);
1279 void bpf_prog_sub(struct bpf_prog *prog, int i);
1280 void bpf_prog_inc(struct bpf_prog *prog);
1281 struct bpf_prog * __must_check bpf_prog_inc_not_zero(struct bpf_prog *prog);
1282 void bpf_prog_put(struct bpf_prog *prog);
1284 void bpf_prog_free_id(struct bpf_prog *prog, bool do_idr_lock);
1285 void bpf_map_free_id(struct bpf_map *map, bool do_idr_lock);
1287 struct bpf_map *bpf_map_get(u32 ufd);
1288 struct bpf_map *bpf_map_get_with_uref(u32 ufd);
1289 struct bpf_map *__bpf_map_get(struct fd f);
1290 void bpf_map_inc(struct bpf_map *map);
1291 void bpf_map_inc_with_uref(struct bpf_map *map);
1292 struct bpf_map * __must_check bpf_map_inc_not_zero(struct bpf_map *map);
1293 void bpf_map_put_with_uref(struct bpf_map *map);
1294 void bpf_map_put(struct bpf_map *map);
1295 void *bpf_map_area_alloc(u64 size, int numa_node);
1296 void *bpf_map_area_mmapable_alloc(u64 size, int numa_node);
1297 void bpf_map_area_free(void *base);
1298 void bpf_map_init_from_attr(struct bpf_map *map, union bpf_attr *attr);
1299 int generic_map_lookup_batch(struct bpf_map *map,
1300 const union bpf_attr *attr,
1301 union bpf_attr __user *uattr);
1302 int generic_map_update_batch(struct bpf_map *map,
1303 const union bpf_attr *attr,
1304 union bpf_attr __user *uattr);
1305 int generic_map_delete_batch(struct bpf_map *map,
1306 const union bpf_attr *attr,
1307 union bpf_attr __user *uattr);
1308 struct bpf_map *bpf_map_get_curr_or_next(u32 *id);
1309 struct bpf_prog *bpf_prog_get_curr_or_next(u32 *id);
1311 #ifdef CONFIG_MEMCG_KMEM
1312 void *bpf_map_kmalloc_node(const struct bpf_map *map, size_t size, gfp_t flags,
1314 void *bpf_map_kzalloc(const struct bpf_map *map, size_t size, gfp_t flags);
1315 void __percpu *bpf_map_alloc_percpu(const struct bpf_map *map, size_t size,
1316 size_t align, gfp_t flags);
1318 static inline void *
1319 bpf_map_kmalloc_node(const struct bpf_map *map, size_t size, gfp_t flags,
1322 return kmalloc_node(size, flags, node);
1325 static inline void *
1326 bpf_map_kzalloc(const struct bpf_map *map, size_t size, gfp_t flags)
1328 return kzalloc(size, flags);
1331 static inline void __percpu *
1332 bpf_map_alloc_percpu(const struct bpf_map *map, size_t size, size_t align,
1335 return __alloc_percpu_gfp(size, align, flags);
1339 extern int sysctl_unprivileged_bpf_disabled;
1341 static inline bool bpf_allow_ptr_leaks(void)
1343 return perfmon_capable();
1346 static inline bool bpf_allow_uninit_stack(void)
1348 return perfmon_capable();
1351 static inline bool bpf_allow_ptr_to_map_access(void)
1353 return perfmon_capable();
1356 static inline bool bpf_bypass_spec_v1(void)
1358 return perfmon_capable();
1361 static inline bool bpf_bypass_spec_v4(void)
1363 return perfmon_capable();
1366 int bpf_map_new_fd(struct bpf_map *map, int flags);
1367 int bpf_prog_new_fd(struct bpf_prog *prog);
1369 void bpf_link_init(struct bpf_link *link, enum bpf_link_type type,
1370 const struct bpf_link_ops *ops, struct bpf_prog *prog);
1371 int bpf_link_prime(struct bpf_link *link, struct bpf_link_primer *primer);
1372 int bpf_link_settle(struct bpf_link_primer *primer);
1373 void bpf_link_cleanup(struct bpf_link_primer *primer);
1374 void bpf_link_inc(struct bpf_link *link);
1375 void bpf_link_put(struct bpf_link *link);
1376 int bpf_link_new_fd(struct bpf_link *link);
1377 struct file *bpf_link_new_file(struct bpf_link *link, int *reserved_fd);
1378 struct bpf_link *bpf_link_get_from_fd(u32 ufd);
1380 int bpf_obj_pin_user(u32 ufd, const char __user *pathname);
1381 int bpf_obj_get_user(const char __user *pathname, int flags);
1383 #define BPF_ITER_FUNC_PREFIX "bpf_iter_"
1384 #define DEFINE_BPF_ITER_FUNC(target, args...) \
1385 extern int bpf_iter_ ## target(args); \
1386 int __init bpf_iter_ ## target(args) { return 0; }
1388 struct bpf_iter_aux_info {
1389 struct bpf_map *map;
1392 typedef int (*bpf_iter_attach_target_t)(struct bpf_prog *prog,
1393 union bpf_iter_link_info *linfo,
1394 struct bpf_iter_aux_info *aux);
1395 typedef void (*bpf_iter_detach_target_t)(struct bpf_iter_aux_info *aux);
1396 typedef void (*bpf_iter_show_fdinfo_t) (const struct bpf_iter_aux_info *aux,
1397 struct seq_file *seq);
1398 typedef int (*bpf_iter_fill_link_info_t)(const struct bpf_iter_aux_info *aux,
1399 struct bpf_link_info *info);
1401 enum bpf_iter_feature {
1402 BPF_ITER_RESCHED = BIT(0),
1405 #define BPF_ITER_CTX_ARG_MAX 2
1406 struct bpf_iter_reg {
1408 bpf_iter_attach_target_t attach_target;
1409 bpf_iter_detach_target_t detach_target;
1410 bpf_iter_show_fdinfo_t show_fdinfo;
1411 bpf_iter_fill_link_info_t fill_link_info;
1412 u32 ctx_arg_info_size;
1414 struct bpf_ctx_arg_aux ctx_arg_info[BPF_ITER_CTX_ARG_MAX];
1415 const struct bpf_iter_seq_info *seq_info;
1418 struct bpf_iter_meta {
1419 __bpf_md_ptr(struct seq_file *, seq);
1424 struct bpf_iter__bpf_map_elem {
1425 __bpf_md_ptr(struct bpf_iter_meta *, meta);
1426 __bpf_md_ptr(struct bpf_map *, map);
1427 __bpf_md_ptr(void *, key);
1428 __bpf_md_ptr(void *, value);
1431 int bpf_iter_reg_target(const struct bpf_iter_reg *reg_info);
1432 void bpf_iter_unreg_target(const struct bpf_iter_reg *reg_info);
1433 bool bpf_iter_prog_supported(struct bpf_prog *prog);
1434 int bpf_iter_link_attach(const union bpf_attr *attr, bpfptr_t uattr, struct bpf_prog *prog);
1435 int bpf_iter_new_fd(struct bpf_link *link);
1436 bool bpf_link_is_iter(struct bpf_link *link);
1437 struct bpf_prog *bpf_iter_get_info(struct bpf_iter_meta *meta, bool in_stop);
1438 int bpf_iter_run_prog(struct bpf_prog *prog, void *ctx);
1439 void bpf_iter_map_show_fdinfo(const struct bpf_iter_aux_info *aux,
1440 struct seq_file *seq);
1441 int bpf_iter_map_fill_link_info(const struct bpf_iter_aux_info *aux,
1442 struct bpf_link_info *info);
1444 int map_set_for_each_callback_args(struct bpf_verifier_env *env,
1445 struct bpf_func_state *caller,
1446 struct bpf_func_state *callee);
1448 int bpf_percpu_hash_copy(struct bpf_map *map, void *key, void *value);
1449 int bpf_percpu_array_copy(struct bpf_map *map, void *key, void *value);
1450 int bpf_percpu_hash_update(struct bpf_map *map, void *key, void *value,
1452 int bpf_percpu_array_update(struct bpf_map *map, void *key, void *value,
1455 int bpf_stackmap_copy(struct bpf_map *map, void *key, void *value);
1457 int bpf_fd_array_map_update_elem(struct bpf_map *map, struct file *map_file,
1458 void *key, void *value, u64 map_flags);
1459 int bpf_fd_array_map_lookup_elem(struct bpf_map *map, void *key, u32 *value);
1460 int bpf_fd_htab_map_update_elem(struct bpf_map *map, struct file *map_file,
1461 void *key, void *value, u64 map_flags);
1462 int bpf_fd_htab_map_lookup_elem(struct bpf_map *map, void *key, u32 *value);
1464 int bpf_get_file_flag(int flags);
1465 int bpf_check_uarg_tail_zero(bpfptr_t uaddr, size_t expected_size,
1466 size_t actual_size);
1468 /* memcpy that is used with 8-byte aligned pointers, power-of-8 size and
1469 * forced to use 'long' read/writes to try to atomically copy long counters.
1470 * Best-effort only. No barriers here, since it _will_ race with concurrent
1471 * updates from BPF programs. Called from bpf syscall and mostly used with
1472 * size 8 or 16 bytes, so ask compiler to inline it.
1474 static inline void bpf_long_memcpy(void *dst, const void *src, u32 size)
1476 const long *lsrc = src;
1479 size /= sizeof(long);
1484 /* verify correctness of eBPF program */
1485 int bpf_check(struct bpf_prog **fp, union bpf_attr *attr, bpfptr_t uattr);
1487 #ifndef CONFIG_BPF_JIT_ALWAYS_ON
1488 void bpf_patch_call_args(struct bpf_insn *insn, u32 stack_depth);
1491 struct btf *bpf_get_btf_vmlinux(void);
1496 struct bpf_dtab_netdev;
1497 struct bpf_cpu_map_entry;
1499 void __dev_flush(void);
1500 int dev_xdp_enqueue(struct net_device *dev, struct xdp_buff *xdp,
1501 struct net_device *dev_rx);
1502 int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp,
1503 struct net_device *dev_rx);
1504 int dev_map_enqueue_multi(struct xdp_buff *xdp, struct net_device *dev_rx,
1505 struct bpf_map *map, bool exclude_ingress);
1506 int dev_map_generic_redirect(struct bpf_dtab_netdev *dst, struct sk_buff *skb,
1507 struct bpf_prog *xdp_prog);
1508 int dev_map_redirect_multi(struct net_device *dev, struct sk_buff *skb,
1509 struct bpf_prog *xdp_prog, struct bpf_map *map,
1510 bool exclude_ingress);
1511 bool dev_map_can_have_prog(struct bpf_map *map);
1513 void __cpu_map_flush(void);
1514 int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu, struct xdp_buff *xdp,
1515 struct net_device *dev_rx);
1516 bool cpu_map_prog_allowed(struct bpf_map *map);
1518 /* Return map's numa specified by userspace */
1519 static inline int bpf_map_attr_numa_node(const union bpf_attr *attr)
1521 return (attr->map_flags & BPF_F_NUMA_NODE) ?
1522 attr->numa_node : NUMA_NO_NODE;
1525 struct bpf_prog *bpf_prog_get_type_path(const char *name, enum bpf_prog_type type);
1526 int array_map_alloc_check(union bpf_attr *attr);
1528 int bpf_prog_test_run_xdp(struct bpf_prog *prog, const union bpf_attr *kattr,
1529 union bpf_attr __user *uattr);
1530 int bpf_prog_test_run_skb(struct bpf_prog *prog, const union bpf_attr *kattr,
1531 union bpf_attr __user *uattr);
1532 int bpf_prog_test_run_tracing(struct bpf_prog *prog,
1533 const union bpf_attr *kattr,
1534 union bpf_attr __user *uattr);
1535 int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog,
1536 const union bpf_attr *kattr,
1537 union bpf_attr __user *uattr);
1538 int bpf_prog_test_run_raw_tp(struct bpf_prog *prog,
1539 const union bpf_attr *kattr,
1540 union bpf_attr __user *uattr);
1541 int bpf_prog_test_run_sk_lookup(struct bpf_prog *prog,
1542 const union bpf_attr *kattr,
1543 union bpf_attr __user *uattr);
1544 bool bpf_prog_test_check_kfunc_call(u32 kfunc_id);
1545 bool btf_ctx_access(int off, int size, enum bpf_access_type type,
1546 const struct bpf_prog *prog,
1547 struct bpf_insn_access_aux *info);
1548 int btf_struct_access(struct bpf_verifier_log *log, const struct btf *btf,
1549 const struct btf_type *t, int off, int size,
1550 enum bpf_access_type atype,
1552 bool btf_struct_ids_match(struct bpf_verifier_log *log,
1553 const struct btf *btf, u32 id, int off,
1554 const struct btf *need_btf, u32 need_type_id);
1556 int btf_distill_func_proto(struct bpf_verifier_log *log,
1558 const struct btf_type *func_proto,
1559 const char *func_name,
1560 struct btf_func_model *m);
1562 struct bpf_reg_state;
1563 int btf_check_subprog_arg_match(struct bpf_verifier_env *env, int subprog,
1564 struct bpf_reg_state *regs);
1565 int btf_check_kfunc_arg_match(struct bpf_verifier_env *env,
1566 const struct btf *btf, u32 func_id,
1567 struct bpf_reg_state *regs);
1568 int btf_prepare_func_args(struct bpf_verifier_env *env, int subprog,
1569 struct bpf_reg_state *reg);
1570 int btf_check_type_match(struct bpf_verifier_log *log, const struct bpf_prog *prog,
1571 struct btf *btf, const struct btf_type *t);
1573 struct bpf_prog *bpf_prog_by_id(u32 id);
1574 struct bpf_link *bpf_link_by_id(u32 id);
1576 const struct bpf_func_proto *bpf_base_func_proto(enum bpf_func_id func_id);
1577 void bpf_task_storage_free(struct task_struct *task);
1578 bool bpf_prog_has_kfunc_call(const struct bpf_prog *prog);
1579 const struct btf_func_model *
1580 bpf_jit_find_kfunc_model(const struct bpf_prog *prog,
1581 const struct bpf_insn *insn);
1582 #else /* !CONFIG_BPF_SYSCALL */
1583 static inline struct bpf_prog *bpf_prog_get(u32 ufd)
1585 return ERR_PTR(-EOPNOTSUPP);
1588 static inline struct bpf_prog *bpf_prog_get_type_dev(u32 ufd,
1589 enum bpf_prog_type type,
1592 return ERR_PTR(-EOPNOTSUPP);
1595 static inline void bpf_prog_add(struct bpf_prog *prog, int i)
1599 static inline void bpf_prog_sub(struct bpf_prog *prog, int i)
1603 static inline void bpf_prog_put(struct bpf_prog *prog)
1607 static inline void bpf_prog_inc(struct bpf_prog *prog)
1611 static inline struct bpf_prog *__must_check
1612 bpf_prog_inc_not_zero(struct bpf_prog *prog)
1614 return ERR_PTR(-EOPNOTSUPP);
1617 static inline void bpf_link_init(struct bpf_link *link, enum bpf_link_type type,
1618 const struct bpf_link_ops *ops,
1619 struct bpf_prog *prog)
1623 static inline int bpf_link_prime(struct bpf_link *link,
1624 struct bpf_link_primer *primer)
1629 static inline int bpf_link_settle(struct bpf_link_primer *primer)
1634 static inline void bpf_link_cleanup(struct bpf_link_primer *primer)
1638 static inline void bpf_link_inc(struct bpf_link *link)
1642 static inline void bpf_link_put(struct bpf_link *link)
1646 static inline int bpf_obj_get_user(const char __user *pathname, int flags)
1651 static inline bool dev_map_can_have_prog(struct bpf_map *map)
1656 static inline void __dev_flush(void)
1661 struct bpf_dtab_netdev;
1662 struct bpf_cpu_map_entry;
1665 int dev_xdp_enqueue(struct net_device *dev, struct xdp_buff *xdp,
1666 struct net_device *dev_rx)
1672 int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp,
1673 struct net_device *dev_rx)
1679 int dev_map_enqueue_multi(struct xdp_buff *xdp, struct net_device *dev_rx,
1680 struct bpf_map *map, bool exclude_ingress)
1687 static inline int dev_map_generic_redirect(struct bpf_dtab_netdev *dst,
1688 struct sk_buff *skb,
1689 struct bpf_prog *xdp_prog)
1695 int dev_map_redirect_multi(struct net_device *dev, struct sk_buff *skb,
1696 struct bpf_prog *xdp_prog, struct bpf_map *map,
1697 bool exclude_ingress)
1702 static inline void __cpu_map_flush(void)
1706 static inline int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu,
1707 struct xdp_buff *xdp,
1708 struct net_device *dev_rx)
1713 static inline bool cpu_map_prog_allowed(struct bpf_map *map)
1718 static inline struct bpf_prog *bpf_prog_get_type_path(const char *name,
1719 enum bpf_prog_type type)
1721 return ERR_PTR(-EOPNOTSUPP);
1724 static inline int bpf_prog_test_run_xdp(struct bpf_prog *prog,
1725 const union bpf_attr *kattr,
1726 union bpf_attr __user *uattr)
1731 static inline int bpf_prog_test_run_skb(struct bpf_prog *prog,
1732 const union bpf_attr *kattr,
1733 union bpf_attr __user *uattr)
1738 static inline int bpf_prog_test_run_tracing(struct bpf_prog *prog,
1739 const union bpf_attr *kattr,
1740 union bpf_attr __user *uattr)
1745 static inline int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog,
1746 const union bpf_attr *kattr,
1747 union bpf_attr __user *uattr)
1752 static inline int bpf_prog_test_run_sk_lookup(struct bpf_prog *prog,
1753 const union bpf_attr *kattr,
1754 union bpf_attr __user *uattr)
1759 static inline bool bpf_prog_test_check_kfunc_call(u32 kfunc_id)
1764 static inline void bpf_map_put(struct bpf_map *map)
1768 static inline struct bpf_prog *bpf_prog_by_id(u32 id)
1770 return ERR_PTR(-ENOTSUPP);
1773 static inline const struct bpf_func_proto *
1774 bpf_base_func_proto(enum bpf_func_id func_id)
1779 static inline void bpf_task_storage_free(struct task_struct *task)
1783 static inline bool bpf_prog_has_kfunc_call(const struct bpf_prog *prog)
1788 static inline const struct btf_func_model *
1789 bpf_jit_find_kfunc_model(const struct bpf_prog *prog,
1790 const struct bpf_insn *insn)
1794 #endif /* CONFIG_BPF_SYSCALL */
1796 void __bpf_free_used_btfs(struct bpf_prog_aux *aux,
1797 struct btf_mod_pair *used_btfs, u32 len);
1799 static inline struct bpf_prog *bpf_prog_get_type(u32 ufd,
1800 enum bpf_prog_type type)
1802 return bpf_prog_get_type_dev(ufd, type, false);
1805 void __bpf_free_used_maps(struct bpf_prog_aux *aux,
1806 struct bpf_map **used_maps, u32 len);
1808 bool bpf_prog_get_ok(struct bpf_prog *, enum bpf_prog_type *, bool);
1810 int bpf_prog_offload_compile(struct bpf_prog *prog);
1811 void bpf_prog_offload_destroy(struct bpf_prog *prog);
1812 int bpf_prog_offload_info_fill(struct bpf_prog_info *info,
1813 struct bpf_prog *prog);
1815 int bpf_map_offload_info_fill(struct bpf_map_info *info, struct bpf_map *map);
1817 int bpf_map_offload_lookup_elem(struct bpf_map *map, void *key, void *value);
1818 int bpf_map_offload_update_elem(struct bpf_map *map,
1819 void *key, void *value, u64 flags);
1820 int bpf_map_offload_delete_elem(struct bpf_map *map, void *key);
1821 int bpf_map_offload_get_next_key(struct bpf_map *map,
1822 void *key, void *next_key);
1824 bool bpf_offload_prog_map_match(struct bpf_prog *prog, struct bpf_map *map);
1826 struct bpf_offload_dev *
1827 bpf_offload_dev_create(const struct bpf_prog_offload_ops *ops, void *priv);
1828 void bpf_offload_dev_destroy(struct bpf_offload_dev *offdev);
1829 void *bpf_offload_dev_priv(struct bpf_offload_dev *offdev);
1830 int bpf_offload_dev_netdev_register(struct bpf_offload_dev *offdev,
1831 struct net_device *netdev);
1832 void bpf_offload_dev_netdev_unregister(struct bpf_offload_dev *offdev,
1833 struct net_device *netdev);
1834 bool bpf_offload_dev_match(struct bpf_prog *prog, struct net_device *netdev);
1836 #if defined(CONFIG_NET) && defined(CONFIG_BPF_SYSCALL)
1837 int bpf_prog_offload_init(struct bpf_prog *prog, union bpf_attr *attr);
1839 static inline bool bpf_prog_is_dev_bound(const struct bpf_prog_aux *aux)
1841 return aux->offload_requested;
1844 static inline bool bpf_map_is_dev_bound(struct bpf_map *map)
1846 return unlikely(map->ops == &bpf_map_offload_ops);
1849 struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr);
1850 void bpf_map_offload_map_free(struct bpf_map *map);
1851 int bpf_prog_test_run_syscall(struct bpf_prog *prog,
1852 const union bpf_attr *kattr,
1853 union bpf_attr __user *uattr);
1855 static inline int bpf_prog_offload_init(struct bpf_prog *prog,
1856 union bpf_attr *attr)
1861 static inline bool bpf_prog_is_dev_bound(struct bpf_prog_aux *aux)
1866 static inline bool bpf_map_is_dev_bound(struct bpf_map *map)
1871 static inline struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr)
1873 return ERR_PTR(-EOPNOTSUPP);
1876 static inline void bpf_map_offload_map_free(struct bpf_map *map)
1880 static inline int bpf_prog_test_run_syscall(struct bpf_prog *prog,
1881 const union bpf_attr *kattr,
1882 union bpf_attr __user *uattr)
1886 #endif /* CONFIG_NET && CONFIG_BPF_SYSCALL */
1888 #if defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL)
1889 int sock_map_get_from_fd(const union bpf_attr *attr, struct bpf_prog *prog);
1890 int sock_map_prog_detach(const union bpf_attr *attr, enum bpf_prog_type ptype);
1891 int sock_map_update_elem_sys(struct bpf_map *map, void *key, void *value, u64 flags);
1892 void sock_map_unhash(struct sock *sk);
1893 void sock_map_close(struct sock *sk, long timeout);
1895 void bpf_sk_reuseport_detach(struct sock *sk);
1896 int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map, void *key,
1898 int bpf_fd_reuseport_array_update_elem(struct bpf_map *map, void *key,
1899 void *value, u64 map_flags);
1901 static inline void bpf_sk_reuseport_detach(struct sock *sk)
1905 #ifdef CONFIG_BPF_SYSCALL
1906 static inline int sock_map_get_from_fd(const union bpf_attr *attr,
1907 struct bpf_prog *prog)
1912 static inline int sock_map_prog_detach(const union bpf_attr *attr,
1913 enum bpf_prog_type ptype)
1918 static inline int sock_map_update_elem_sys(struct bpf_map *map, void *key, void *value,
1924 static inline int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map,
1925 void *key, void *value)
1930 static inline int bpf_fd_reuseport_array_update_elem(struct bpf_map *map,
1931 void *key, void *value,
1936 #endif /* CONFIG_BPF_SYSCALL */
1937 #endif /* defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL) */
1939 /* verifier prototypes for helper functions called from eBPF programs */
1940 extern const struct bpf_func_proto bpf_map_lookup_elem_proto;
1941 extern const struct bpf_func_proto bpf_map_update_elem_proto;
1942 extern const struct bpf_func_proto bpf_map_delete_elem_proto;
1943 extern const struct bpf_func_proto bpf_map_push_elem_proto;
1944 extern const struct bpf_func_proto bpf_map_pop_elem_proto;
1945 extern const struct bpf_func_proto bpf_map_peek_elem_proto;
1947 extern const struct bpf_func_proto bpf_get_prandom_u32_proto;
1948 extern const struct bpf_func_proto bpf_get_smp_processor_id_proto;
1949 extern const struct bpf_func_proto bpf_get_numa_node_id_proto;
1950 extern const struct bpf_func_proto bpf_tail_call_proto;
1951 extern const struct bpf_func_proto bpf_ktime_get_ns_proto;
1952 extern const struct bpf_func_proto bpf_ktime_get_boot_ns_proto;
1953 extern const struct bpf_func_proto bpf_get_current_pid_tgid_proto;
1954 extern const struct bpf_func_proto bpf_get_current_uid_gid_proto;
1955 extern const struct bpf_func_proto bpf_get_current_comm_proto;
1956 extern const struct bpf_func_proto bpf_get_stackid_proto;
1957 extern const struct bpf_func_proto bpf_get_stack_proto;
1958 extern const struct bpf_func_proto bpf_get_task_stack_proto;
1959 extern const struct bpf_func_proto bpf_get_stackid_proto_pe;
1960 extern const struct bpf_func_proto bpf_get_stack_proto_pe;
1961 extern const struct bpf_func_proto bpf_sock_map_update_proto;
1962 extern const struct bpf_func_proto bpf_sock_hash_update_proto;
1963 extern const struct bpf_func_proto bpf_get_current_cgroup_id_proto;
1964 extern const struct bpf_func_proto bpf_get_current_ancestor_cgroup_id_proto;
1965 extern const struct bpf_func_proto bpf_msg_redirect_hash_proto;
1966 extern const struct bpf_func_proto bpf_msg_redirect_map_proto;
1967 extern const struct bpf_func_proto bpf_sk_redirect_hash_proto;
1968 extern const struct bpf_func_proto bpf_sk_redirect_map_proto;
1969 extern const struct bpf_func_proto bpf_spin_lock_proto;
1970 extern const struct bpf_func_proto bpf_spin_unlock_proto;
1971 extern const struct bpf_func_proto bpf_get_local_storage_proto;
1972 extern const struct bpf_func_proto bpf_strtol_proto;
1973 extern const struct bpf_func_proto bpf_strtoul_proto;
1974 extern const struct bpf_func_proto bpf_tcp_sock_proto;
1975 extern const struct bpf_func_proto bpf_jiffies64_proto;
1976 extern const struct bpf_func_proto bpf_get_ns_current_pid_tgid_proto;
1977 extern const struct bpf_func_proto bpf_event_output_data_proto;
1978 extern const struct bpf_func_proto bpf_ringbuf_output_proto;
1979 extern const struct bpf_func_proto bpf_ringbuf_reserve_proto;
1980 extern const struct bpf_func_proto bpf_ringbuf_submit_proto;
1981 extern const struct bpf_func_proto bpf_ringbuf_discard_proto;
1982 extern const struct bpf_func_proto bpf_ringbuf_query_proto;
1983 extern const struct bpf_func_proto bpf_skc_to_tcp6_sock_proto;
1984 extern const struct bpf_func_proto bpf_skc_to_tcp_sock_proto;
1985 extern const struct bpf_func_proto bpf_skc_to_tcp_timewait_sock_proto;
1986 extern const struct bpf_func_proto bpf_skc_to_tcp_request_sock_proto;
1987 extern const struct bpf_func_proto bpf_skc_to_udp6_sock_proto;
1988 extern const struct bpf_func_proto bpf_copy_from_user_proto;
1989 extern const struct bpf_func_proto bpf_snprintf_btf_proto;
1990 extern const struct bpf_func_proto bpf_snprintf_proto;
1991 extern const struct bpf_func_proto bpf_per_cpu_ptr_proto;
1992 extern const struct bpf_func_proto bpf_this_cpu_ptr_proto;
1993 extern const struct bpf_func_proto bpf_ktime_get_coarse_ns_proto;
1994 extern const struct bpf_func_proto bpf_sock_from_file_proto;
1995 extern const struct bpf_func_proto bpf_get_socket_ptr_cookie_proto;
1996 extern const struct bpf_func_proto bpf_task_storage_get_proto;
1997 extern const struct bpf_func_proto bpf_task_storage_delete_proto;
1998 extern const struct bpf_func_proto bpf_for_each_map_elem_proto;
1999 extern const struct bpf_func_proto bpf_btf_find_by_name_kind_proto;
2001 const struct bpf_func_proto *bpf_tracing_func_proto(
2002 enum bpf_func_id func_id, const struct bpf_prog *prog);
2004 const struct bpf_func_proto *tracing_prog_func_proto(
2005 enum bpf_func_id func_id, const struct bpf_prog *prog);
2007 /* Shared helpers among cBPF and eBPF. */
2008 void bpf_user_rnd_init_once(void);
2009 u64 bpf_user_rnd_u32(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
2010 u64 bpf_get_raw_cpu_id(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
2012 #if defined(CONFIG_NET)
2013 bool bpf_sock_common_is_valid_access(int off, int size,
2014 enum bpf_access_type type,
2015 struct bpf_insn_access_aux *info);
2016 bool bpf_sock_is_valid_access(int off, int size, enum bpf_access_type type,
2017 struct bpf_insn_access_aux *info);
2018 u32 bpf_sock_convert_ctx_access(enum bpf_access_type type,
2019 const struct bpf_insn *si,
2020 struct bpf_insn *insn_buf,
2021 struct bpf_prog *prog,
2024 static inline bool bpf_sock_common_is_valid_access(int off, int size,
2025 enum bpf_access_type type,
2026 struct bpf_insn_access_aux *info)
2030 static inline bool bpf_sock_is_valid_access(int off, int size,
2031 enum bpf_access_type type,
2032 struct bpf_insn_access_aux *info)
2036 static inline u32 bpf_sock_convert_ctx_access(enum bpf_access_type type,
2037 const struct bpf_insn *si,
2038 struct bpf_insn *insn_buf,
2039 struct bpf_prog *prog,
2047 struct sk_reuseport_kern {
2048 struct sk_buff *skb;
2050 struct sock *selected_sk;
2051 struct sock *migrating_sk;
2057 bool bpf_tcp_sock_is_valid_access(int off, int size, enum bpf_access_type type,
2058 struct bpf_insn_access_aux *info);
2060 u32 bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type,
2061 const struct bpf_insn *si,
2062 struct bpf_insn *insn_buf,
2063 struct bpf_prog *prog,
2066 bool bpf_xdp_sock_is_valid_access(int off, int size, enum bpf_access_type type,
2067 struct bpf_insn_access_aux *info);
2069 u32 bpf_xdp_sock_convert_ctx_access(enum bpf_access_type type,
2070 const struct bpf_insn *si,
2071 struct bpf_insn *insn_buf,
2072 struct bpf_prog *prog,
2075 static inline bool bpf_tcp_sock_is_valid_access(int off, int size,
2076 enum bpf_access_type type,
2077 struct bpf_insn_access_aux *info)
2082 static inline u32 bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type,
2083 const struct bpf_insn *si,
2084 struct bpf_insn *insn_buf,
2085 struct bpf_prog *prog,
2090 static inline bool bpf_xdp_sock_is_valid_access(int off, int size,
2091 enum bpf_access_type type,
2092 struct bpf_insn_access_aux *info)
2097 static inline u32 bpf_xdp_sock_convert_ctx_access(enum bpf_access_type type,
2098 const struct bpf_insn *si,
2099 struct bpf_insn *insn_buf,
2100 struct bpf_prog *prog,
2105 #endif /* CONFIG_INET */
2107 enum bpf_text_poke_type {
2112 int bpf_arch_text_poke(void *ip, enum bpf_text_poke_type t,
2113 void *addr1, void *addr2);
2116 bool btf_id_set_contains(const struct btf_id_set *set, u32 id);
2118 int bpf_bprintf_prepare(char *fmt, u32 fmt_size, const u64 *raw_args,
2119 u32 **bin_buf, u32 num_args);
2120 void bpf_bprintf_cleanup(void);
2122 #endif /* _LINUX_BPF_H */