1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /* Copyright (c) 2011-2014 PLUMgrid, http://plumgrid.com
7 #include <uapi/linux/bpf.h>
8 #include <uapi/linux/filter.h>
10 #include <linux/workqueue.h>
11 #include <linux/file.h>
12 #include <linux/percpu.h>
13 #include <linux/err.h>
14 #include <linux/rbtree_latch.h>
15 #include <linux/numa.h>
16 #include <linux/mm_types.h>
17 #include <linux/wait.h>
18 #include <linux/refcount.h>
19 #include <linux/mutex.h>
20 #include <linux/module.h>
21 #include <linux/kallsyms.h>
22 #include <linux/capability.h>
23 #include <linux/sched/mm.h>
24 #include <linux/slab.h>
25 #include <linux/percpu-refcount.h>
26 #include <linux/stddef.h>
27 #include <linux/bpfptr.h>
28 #include <linux/btf.h>
29 #include <linux/rcupdate_trace.h>
30 #include <linux/static_call.h>
32 struct bpf_verifier_env;
33 struct bpf_verifier_log;
42 struct exception_table_entry;
43 struct seq_operations;
44 struct bpf_iter_aux_info;
45 struct bpf_local_storage;
46 struct bpf_local_storage_map;
50 struct bpf_func_state;
53 extern struct idr btf_idr;
54 extern spinlock_t btf_idr_lock;
55 extern struct kobject *btf_kobj;
57 typedef u64 (*bpf_callback_t)(u64, u64, u64, u64, u64);
58 typedef int (*bpf_iter_init_seq_priv_t)(void *private_data,
59 struct bpf_iter_aux_info *aux);
60 typedef void (*bpf_iter_fini_seq_priv_t)(void *private_data);
61 typedef unsigned int (*bpf_func_t)(const void *,
62 const struct bpf_insn *);
63 struct bpf_iter_seq_info {
64 const struct seq_operations *seq_ops;
65 bpf_iter_init_seq_priv_t init_seq_private;
66 bpf_iter_fini_seq_priv_t fini_seq_private;
70 /* map is generic key/value storage optionally accessible by eBPF programs */
72 /* funcs callable from userspace (via syscall) */
73 int (*map_alloc_check)(union bpf_attr *attr);
74 struct bpf_map *(*map_alloc)(union bpf_attr *attr);
75 void (*map_release)(struct bpf_map *map, struct file *map_file);
76 void (*map_free)(struct bpf_map *map);
77 int (*map_get_next_key)(struct bpf_map *map, void *key, void *next_key);
78 void (*map_release_uref)(struct bpf_map *map);
79 void *(*map_lookup_elem_sys_only)(struct bpf_map *map, void *key);
80 int (*map_lookup_batch)(struct bpf_map *map, const union bpf_attr *attr,
81 union bpf_attr __user *uattr);
82 int (*map_lookup_and_delete_elem)(struct bpf_map *map, void *key,
83 void *value, u64 flags);
84 int (*map_lookup_and_delete_batch)(struct bpf_map *map,
85 const union bpf_attr *attr,
86 union bpf_attr __user *uattr);
87 int (*map_update_batch)(struct bpf_map *map, const union bpf_attr *attr,
88 union bpf_attr __user *uattr);
89 int (*map_delete_batch)(struct bpf_map *map, const union bpf_attr *attr,
90 union bpf_attr __user *uattr);
92 /* funcs callable from userspace and from eBPF programs */
93 void *(*map_lookup_elem)(struct bpf_map *map, void *key);
94 int (*map_update_elem)(struct bpf_map *map, void *key, void *value, u64 flags);
95 int (*map_delete_elem)(struct bpf_map *map, void *key);
96 int (*map_push_elem)(struct bpf_map *map, void *value, u64 flags);
97 int (*map_pop_elem)(struct bpf_map *map, void *value);
98 int (*map_peek_elem)(struct bpf_map *map, void *value);
99 void *(*map_lookup_percpu_elem)(struct bpf_map *map, void *key, u32 cpu);
101 /* funcs called by prog_array and perf_event_array map */
102 void *(*map_fd_get_ptr)(struct bpf_map *map, struct file *map_file,
104 void (*map_fd_put_ptr)(void *ptr);
105 int (*map_gen_lookup)(struct bpf_map *map, struct bpf_insn *insn_buf);
106 u32 (*map_fd_sys_lookup_elem)(void *ptr);
107 void (*map_seq_show_elem)(struct bpf_map *map, void *key,
109 int (*map_check_btf)(const struct bpf_map *map,
110 const struct btf *btf,
111 const struct btf_type *key_type,
112 const struct btf_type *value_type);
114 /* Prog poke tracking helpers. */
115 int (*map_poke_track)(struct bpf_map *map, struct bpf_prog_aux *aux);
116 void (*map_poke_untrack)(struct bpf_map *map, struct bpf_prog_aux *aux);
117 void (*map_poke_run)(struct bpf_map *map, u32 key, struct bpf_prog *old,
118 struct bpf_prog *new);
120 /* Direct value access helpers. */
121 int (*map_direct_value_addr)(const struct bpf_map *map,
123 int (*map_direct_value_meta)(const struct bpf_map *map,
125 int (*map_mmap)(struct bpf_map *map, struct vm_area_struct *vma);
126 __poll_t (*map_poll)(struct bpf_map *map, struct file *filp,
127 struct poll_table_struct *pts);
129 /* Functions called by bpf_local_storage maps */
130 int (*map_local_storage_charge)(struct bpf_local_storage_map *smap,
131 void *owner, u32 size);
132 void (*map_local_storage_uncharge)(struct bpf_local_storage_map *smap,
133 void *owner, u32 size);
134 struct bpf_local_storage __rcu ** (*map_owner_storage_ptr)(void *owner);
137 int (*map_redirect)(struct bpf_map *map, u32 ifindex, u64 flags);
139 /* map_meta_equal must be implemented for maps that can be
140 * used as an inner map. It is a runtime check to ensure
141 * an inner map can be inserted to an outer map.
143 * Some properties of the inner map has been used during the
144 * verification time. When inserting an inner map at the runtime,
145 * map_meta_equal has to ensure the inserting map has the same
146 * properties that the verifier has used earlier.
148 bool (*map_meta_equal)(const struct bpf_map *meta0,
149 const struct bpf_map *meta1);
152 int (*map_set_for_each_callback_args)(struct bpf_verifier_env *env,
153 struct bpf_func_state *caller,
154 struct bpf_func_state *callee);
155 int (*map_for_each_callback)(struct bpf_map *map,
156 bpf_callback_t callback_fn,
157 void *callback_ctx, u64 flags);
159 /* BTF id of struct allocated by map_alloc */
162 /* bpf_iter info used to open a seq_file */
163 const struct bpf_iter_seq_info *iter_seq_info;
167 /* Support at most 8 pointers in a BPF map value */
168 BPF_MAP_VALUE_OFF_MAX = 8,
169 BPF_MAP_OFF_ARR_MAX = BPF_MAP_VALUE_OFF_MAX +
170 1 + /* for bpf_spin_lock */
171 1, /* for bpf_timer */
179 struct bpf_map_value_off_desc {
181 enum bpf_kptr_type type;
184 struct module *module;
185 btf_dtor_kfunc_t dtor;
190 struct bpf_map_value_off {
192 struct bpf_map_value_off_desc off[];
195 struct bpf_map_off_arr {
197 u32 field_off[BPF_MAP_OFF_ARR_MAX];
198 u8 field_sz[BPF_MAP_OFF_ARR_MAX];
202 /* The first two cachelines with read-mostly members of which some
203 * are also accessed in fast-path (e.g. ops, max_entries).
205 const struct bpf_map_ops *ops ____cacheline_aligned;
206 struct bpf_map *inner_map_meta;
207 #ifdef CONFIG_SECURITY
210 enum bpf_map_type map_type;
214 u64 map_extra; /* any per-map-type extra fields */
216 int spin_lock_off; /* >=0 valid offset, <0 error */
217 struct bpf_map_value_off *kptr_off_tab;
218 int timer_off; /* >=0 valid offset, <0 error */
222 u32 btf_value_type_id;
223 u32 btf_vmlinux_value_type_id;
225 #ifdef CONFIG_MEMCG_KMEM
226 struct obj_cgroup *objcg;
228 char name[BPF_OBJ_NAME_LEN];
229 struct bpf_map_off_arr *off_arr;
230 /* The 3rd and 4th cacheline with misc members to avoid false sharing
231 * particularly with refcounting.
233 atomic64_t refcnt ____cacheline_aligned;
235 struct work_struct work;
236 struct mutex freeze_mutex;
238 /* 'Ownership' of program-containing map is claimed by the first program
239 * that is going to use this map or by the first program which FD is
240 * stored in the map to make sure that all callers and callees have the
241 * same prog type, JITed flag and xdp_has_frags flag.
245 enum bpf_prog_type type;
250 bool frozen; /* write-once; write-protected by freeze_mutex */
253 static inline bool map_value_has_spin_lock(const struct bpf_map *map)
255 return map->spin_lock_off >= 0;
258 static inline bool map_value_has_timer(const struct bpf_map *map)
260 return map->timer_off >= 0;
263 static inline bool map_value_has_kptrs(const struct bpf_map *map)
265 return !IS_ERR_OR_NULL(map->kptr_off_tab);
268 static inline void check_and_init_map_value(struct bpf_map *map, void *dst)
270 if (unlikely(map_value_has_spin_lock(map)))
271 memset(dst + map->spin_lock_off, 0, sizeof(struct bpf_spin_lock));
272 if (unlikely(map_value_has_timer(map)))
273 memset(dst + map->timer_off, 0, sizeof(struct bpf_timer));
274 if (unlikely(map_value_has_kptrs(map))) {
275 struct bpf_map_value_off *tab = map->kptr_off_tab;
278 for (i = 0; i < tab->nr_off; i++)
279 *(u64 *)(dst + tab->off[i].offset) = 0;
283 /* copy everything but bpf_spin_lock and bpf_timer. There could be one of each. */
284 static inline void copy_map_value(struct bpf_map *map, void *dst, void *src)
289 if (likely(!map->off_arr)) {
290 memcpy(dst, src, map->value_size);
294 for (i = 0; i < map->off_arr->cnt; i++) {
295 u32 next_off = map->off_arr->field_off[i];
297 memcpy(dst + curr_off, src + curr_off, next_off - curr_off);
298 curr_off += map->off_arr->field_sz[i];
300 memcpy(dst + curr_off, src + curr_off, map->value_size - curr_off);
302 void copy_map_value_locked(struct bpf_map *map, void *dst, void *src,
304 void bpf_timer_cancel_and_free(void *timer);
305 int bpf_obj_name_cpy(char *dst, const char *src, unsigned int size);
307 struct bpf_offload_dev;
308 struct bpf_offloaded_map;
310 struct bpf_map_dev_ops {
311 int (*map_get_next_key)(struct bpf_offloaded_map *map,
312 void *key, void *next_key);
313 int (*map_lookup_elem)(struct bpf_offloaded_map *map,
314 void *key, void *value);
315 int (*map_update_elem)(struct bpf_offloaded_map *map,
316 void *key, void *value, u64 flags);
317 int (*map_delete_elem)(struct bpf_offloaded_map *map, void *key);
320 struct bpf_offloaded_map {
322 struct net_device *netdev;
323 const struct bpf_map_dev_ops *dev_ops;
325 struct list_head offloads;
328 static inline struct bpf_offloaded_map *map_to_offmap(struct bpf_map *map)
330 return container_of(map, struct bpf_offloaded_map, map);
333 static inline bool bpf_map_offload_neutral(const struct bpf_map *map)
335 return map->map_type == BPF_MAP_TYPE_PERF_EVENT_ARRAY;
338 static inline bool bpf_map_support_seq_show(const struct bpf_map *map)
340 return (map->btf_value_type_id || map->btf_vmlinux_value_type_id) &&
341 map->ops->map_seq_show_elem;
344 int map_check_no_btf(const struct bpf_map *map,
345 const struct btf *btf,
346 const struct btf_type *key_type,
347 const struct btf_type *value_type);
349 bool bpf_map_meta_equal(const struct bpf_map *meta0,
350 const struct bpf_map *meta1);
352 extern const struct bpf_map_ops bpf_map_offload_ops;
354 /* bpf_type_flag contains a set of flags that are applicable to the values of
355 * arg_type, ret_type and reg_type. For example, a pointer value may be null,
356 * or a memory is read-only. We classify types into two categories: base types
357 * and extended types. Extended types are base types combined with a type flag.
359 * Currently there are no more than 32 base types in arg_type, ret_type and
362 #define BPF_BASE_TYPE_BITS 8
365 /* PTR may be NULL. */
366 PTR_MAYBE_NULL = BIT(0 + BPF_BASE_TYPE_BITS),
368 /* MEM is read-only. When applied on bpf_arg, it indicates the arg is
369 * compatible with both mutable and immutable memory.
371 MEM_RDONLY = BIT(1 + BPF_BASE_TYPE_BITS),
373 /* MEM was "allocated" from a different helper, and cannot be mixed
374 * with regular non-MEM_ALLOC'ed MEM types.
376 MEM_ALLOC = BIT(2 + BPF_BASE_TYPE_BITS),
378 /* MEM is in user address space. */
379 MEM_USER = BIT(3 + BPF_BASE_TYPE_BITS),
381 /* MEM is a percpu memory. MEM_PERCPU tags PTR_TO_BTF_ID. When tagged
382 * with MEM_PERCPU, PTR_TO_BTF_ID _cannot_ be directly accessed. In
383 * order to drop this tag, it must be passed into bpf_per_cpu_ptr()
384 * or bpf_this_cpu_ptr(), which will return the pointer corresponding
385 * to the specified cpu.
387 MEM_PERCPU = BIT(4 + BPF_BASE_TYPE_BITS),
389 /* Indicates that the argument will be released. */
390 OBJ_RELEASE = BIT(5 + BPF_BASE_TYPE_BITS),
392 /* PTR is not trusted. This is only used with PTR_TO_BTF_ID, to mark
393 * unreferenced and referenced kptr loaded from map value using a load
394 * instruction, so that they can only be dereferenced but not escape the
395 * BPF program into the kernel (i.e. cannot be passed as arguments to
396 * kfunc or bpf helpers).
398 PTR_UNTRUSTED = BIT(6 + BPF_BASE_TYPE_BITS),
400 MEM_UNINIT = BIT(7 + BPF_BASE_TYPE_BITS),
402 /* DYNPTR points to memory local to the bpf program. */
403 DYNPTR_TYPE_LOCAL = BIT(8 + BPF_BASE_TYPE_BITS),
405 /* DYNPTR points to a ringbuf record. */
406 DYNPTR_TYPE_RINGBUF = BIT(9 + BPF_BASE_TYPE_BITS),
408 /* Size is known at compile time. */
409 MEM_FIXED_SIZE = BIT(10 + BPF_BASE_TYPE_BITS),
412 __BPF_TYPE_LAST_FLAG = __BPF_TYPE_FLAG_MAX - 1,
415 #define DYNPTR_TYPE_FLAG_MASK (DYNPTR_TYPE_LOCAL | DYNPTR_TYPE_RINGBUF)
417 /* Max number of base types. */
418 #define BPF_BASE_TYPE_LIMIT (1UL << BPF_BASE_TYPE_BITS)
420 /* Max number of all types. */
421 #define BPF_TYPE_LIMIT (__BPF_TYPE_LAST_FLAG | (__BPF_TYPE_LAST_FLAG - 1))
423 /* function argument constraints */
425 ARG_DONTCARE = 0, /* unused argument in helper function */
427 /* the following constraints used to prototype
428 * bpf_map_lookup/update/delete_elem() functions
430 ARG_CONST_MAP_PTR, /* const argument used as pointer to bpf_map */
431 ARG_PTR_TO_MAP_KEY, /* pointer to stack used as map key */
432 ARG_PTR_TO_MAP_VALUE, /* pointer to stack used as map value */
434 /* Used to prototype bpf_memcmp() and other functions that access data
435 * on eBPF program stack
437 ARG_PTR_TO_MEM, /* pointer to valid memory (stack, packet, map value) */
439 ARG_CONST_SIZE, /* number of bytes accessed from memory */
440 ARG_CONST_SIZE_OR_ZERO, /* number of bytes accessed from memory or 0 */
442 ARG_PTR_TO_CTX, /* pointer to context */
443 ARG_ANYTHING, /* any (initialized) argument is ok */
444 ARG_PTR_TO_SPIN_LOCK, /* pointer to bpf_spin_lock */
445 ARG_PTR_TO_SOCK_COMMON, /* pointer to sock_common */
446 ARG_PTR_TO_INT, /* pointer to int */
447 ARG_PTR_TO_LONG, /* pointer to long */
448 ARG_PTR_TO_SOCKET, /* pointer to bpf_sock (fullsock) */
449 ARG_PTR_TO_BTF_ID, /* pointer to in-kernel struct */
450 ARG_PTR_TO_ALLOC_MEM, /* pointer to dynamically allocated memory */
451 ARG_CONST_ALLOC_SIZE_OR_ZERO, /* number of allocated bytes requested */
452 ARG_PTR_TO_BTF_ID_SOCK_COMMON, /* pointer to in-kernel sock_common or bpf-mirrored bpf_sock */
453 ARG_PTR_TO_PERCPU_BTF_ID, /* pointer to in-kernel percpu type */
454 ARG_PTR_TO_FUNC, /* pointer to a bpf program function */
455 ARG_PTR_TO_STACK, /* pointer to stack */
456 ARG_PTR_TO_CONST_STR, /* pointer to a null terminated read-only string */
457 ARG_PTR_TO_TIMER, /* pointer to bpf_timer */
458 ARG_PTR_TO_KPTR, /* pointer to referenced kptr */
459 ARG_PTR_TO_DYNPTR, /* pointer to bpf_dynptr. See bpf_type_flag for dynptr type */
462 /* Extended arg_types. */
463 ARG_PTR_TO_MAP_VALUE_OR_NULL = PTR_MAYBE_NULL | ARG_PTR_TO_MAP_VALUE,
464 ARG_PTR_TO_MEM_OR_NULL = PTR_MAYBE_NULL | ARG_PTR_TO_MEM,
465 ARG_PTR_TO_CTX_OR_NULL = PTR_MAYBE_NULL | ARG_PTR_TO_CTX,
466 ARG_PTR_TO_SOCKET_OR_NULL = PTR_MAYBE_NULL | ARG_PTR_TO_SOCKET,
467 ARG_PTR_TO_ALLOC_MEM_OR_NULL = PTR_MAYBE_NULL | ARG_PTR_TO_ALLOC_MEM,
468 ARG_PTR_TO_STACK_OR_NULL = PTR_MAYBE_NULL | ARG_PTR_TO_STACK,
469 ARG_PTR_TO_BTF_ID_OR_NULL = PTR_MAYBE_NULL | ARG_PTR_TO_BTF_ID,
470 /* pointer to memory does not need to be initialized, helper function must fill
471 * all bytes or clear them in error case.
473 ARG_PTR_TO_UNINIT_MEM = MEM_UNINIT | ARG_PTR_TO_MEM,
474 /* Pointer to valid memory of size known at compile time. */
475 ARG_PTR_TO_FIXED_SIZE_MEM = MEM_FIXED_SIZE | ARG_PTR_TO_MEM,
477 /* This must be the last entry. Its purpose is to ensure the enum is
478 * wide enough to hold the higher bits reserved for bpf_type_flag.
480 __BPF_ARG_TYPE_LIMIT = BPF_TYPE_LIMIT,
482 static_assert(__BPF_ARG_TYPE_MAX <= BPF_BASE_TYPE_LIMIT);
484 /* type of values returned from helper functions */
485 enum bpf_return_type {
486 RET_INTEGER, /* function returns integer */
487 RET_VOID, /* function doesn't return anything */
488 RET_PTR_TO_MAP_VALUE, /* returns a pointer to map elem value */
489 RET_PTR_TO_SOCKET, /* returns a pointer to a socket */
490 RET_PTR_TO_TCP_SOCK, /* returns a pointer to a tcp_sock */
491 RET_PTR_TO_SOCK_COMMON, /* returns a pointer to a sock_common */
492 RET_PTR_TO_ALLOC_MEM, /* returns a pointer to dynamically allocated memory */
493 RET_PTR_TO_MEM_OR_BTF_ID, /* returns a pointer to a valid memory or a btf_id */
494 RET_PTR_TO_BTF_ID, /* returns a pointer to a btf_id */
497 /* Extended ret_types. */
498 RET_PTR_TO_MAP_VALUE_OR_NULL = PTR_MAYBE_NULL | RET_PTR_TO_MAP_VALUE,
499 RET_PTR_TO_SOCKET_OR_NULL = PTR_MAYBE_NULL | RET_PTR_TO_SOCKET,
500 RET_PTR_TO_TCP_SOCK_OR_NULL = PTR_MAYBE_NULL | RET_PTR_TO_TCP_SOCK,
501 RET_PTR_TO_SOCK_COMMON_OR_NULL = PTR_MAYBE_NULL | RET_PTR_TO_SOCK_COMMON,
502 RET_PTR_TO_ALLOC_MEM_OR_NULL = PTR_MAYBE_NULL | MEM_ALLOC | RET_PTR_TO_ALLOC_MEM,
503 RET_PTR_TO_DYNPTR_MEM_OR_NULL = PTR_MAYBE_NULL | RET_PTR_TO_ALLOC_MEM,
504 RET_PTR_TO_BTF_ID_OR_NULL = PTR_MAYBE_NULL | RET_PTR_TO_BTF_ID,
506 /* This must be the last entry. Its purpose is to ensure the enum is
507 * wide enough to hold the higher bits reserved for bpf_type_flag.
509 __BPF_RET_TYPE_LIMIT = BPF_TYPE_LIMIT,
511 static_assert(__BPF_RET_TYPE_MAX <= BPF_BASE_TYPE_LIMIT);
513 /* eBPF function prototype used by verifier to allow BPF_CALLs from eBPF programs
514 * to in-kernel helper functions and for adjusting imm32 field in BPF_CALL
515 * instructions after verifying
517 struct bpf_func_proto {
518 u64 (*func)(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
521 enum bpf_return_type ret_type;
524 enum bpf_arg_type arg1_type;
525 enum bpf_arg_type arg2_type;
526 enum bpf_arg_type arg3_type;
527 enum bpf_arg_type arg4_type;
528 enum bpf_arg_type arg5_type;
530 enum bpf_arg_type arg_type[5];
550 int *ret_btf_id; /* return value btf_id */
551 bool (*allowed)(const struct bpf_prog *prog);
554 /* bpf_context is intentionally undefined structure. Pointer to bpf_context is
555 * the first argument to eBPF programs.
556 * For socket filters: 'struct bpf_context *' == 'struct sk_buff *'
560 enum bpf_access_type {
565 /* types of values stored in eBPF registers */
566 /* Pointer types represent:
569 * pointer + (u16) var
570 * pointer + (u16) var + imm
571 * if (range > 0) then [ptr, ptr + range - off) is safe to access
572 * if (id > 0) means that some 'var' was added
573 * if (off > 0) means that 'imm' was added
576 NOT_INIT = 0, /* nothing was written into register */
577 SCALAR_VALUE, /* reg doesn't contain a valid pointer */
578 PTR_TO_CTX, /* reg points to bpf_context */
579 CONST_PTR_TO_MAP, /* reg points to struct bpf_map */
580 PTR_TO_MAP_VALUE, /* reg points to map element value */
581 PTR_TO_MAP_KEY, /* reg points to a map element key */
582 PTR_TO_STACK, /* reg == frame_pointer + offset */
583 PTR_TO_PACKET_META, /* skb->data - meta_len */
584 PTR_TO_PACKET, /* reg points to skb->data */
585 PTR_TO_PACKET_END, /* skb->data + headlen */
586 PTR_TO_FLOW_KEYS, /* reg points to bpf_flow_keys */
587 PTR_TO_SOCKET, /* reg points to struct bpf_sock */
588 PTR_TO_SOCK_COMMON, /* reg points to sock_common */
589 PTR_TO_TCP_SOCK, /* reg points to struct tcp_sock */
590 PTR_TO_TP_BUFFER, /* reg points to a writable raw tp's buffer */
591 PTR_TO_XDP_SOCK, /* reg points to struct xdp_sock */
592 /* PTR_TO_BTF_ID points to a kernel struct that does not need
593 * to be null checked by the BPF program. This does not imply the
594 * pointer is _not_ null and in practice this can easily be a null
595 * pointer when reading pointer chains. The assumption is program
596 * context will handle null pointer dereference typically via fault
597 * handling. The verifier must keep this in mind and can make no
598 * assumptions about null or non-null when doing branch analysis.
599 * Further, when passed into helpers the helpers can not, without
600 * additional context, assume the value is non-null.
603 /* PTR_TO_BTF_ID_OR_NULL points to a kernel struct that has not
604 * been checked for null. Used primarily to inform the verifier
605 * an explicit null check is required for this struct.
607 PTR_TO_MEM, /* reg points to valid memory region */
608 PTR_TO_BUF, /* reg points to a read/write buffer */
609 PTR_TO_FUNC, /* reg points to a bpf program function */
612 /* Extended reg_types. */
613 PTR_TO_MAP_VALUE_OR_NULL = PTR_MAYBE_NULL | PTR_TO_MAP_VALUE,
614 PTR_TO_SOCKET_OR_NULL = PTR_MAYBE_NULL | PTR_TO_SOCKET,
615 PTR_TO_SOCK_COMMON_OR_NULL = PTR_MAYBE_NULL | PTR_TO_SOCK_COMMON,
616 PTR_TO_TCP_SOCK_OR_NULL = PTR_MAYBE_NULL | PTR_TO_TCP_SOCK,
617 PTR_TO_BTF_ID_OR_NULL = PTR_MAYBE_NULL | PTR_TO_BTF_ID,
619 /* This must be the last entry. Its purpose is to ensure the enum is
620 * wide enough to hold the higher bits reserved for bpf_type_flag.
622 __BPF_REG_TYPE_LIMIT = BPF_TYPE_LIMIT,
624 static_assert(__BPF_REG_TYPE_MAX <= BPF_BASE_TYPE_LIMIT);
626 /* The information passed from prog-specific *_is_valid_access
627 * back to the verifier.
629 struct bpf_insn_access_aux {
630 enum bpf_reg_type reg_type;
638 struct bpf_verifier_log *log; /* for verbose logs */
642 bpf_ctx_record_field_size(struct bpf_insn_access_aux *aux, u32 size)
644 aux->ctx_field_size = size;
647 static inline bool bpf_pseudo_func(const struct bpf_insn *insn)
649 return insn->code == (BPF_LD | BPF_IMM | BPF_DW) &&
650 insn->src_reg == BPF_PSEUDO_FUNC;
653 struct bpf_prog_ops {
654 int (*test_run)(struct bpf_prog *prog, const union bpf_attr *kattr,
655 union bpf_attr __user *uattr);
658 struct bpf_verifier_ops {
659 /* return eBPF function prototype for verification */
660 const struct bpf_func_proto *
661 (*get_func_proto)(enum bpf_func_id func_id,
662 const struct bpf_prog *prog);
664 /* return true if 'size' wide access at offset 'off' within bpf_context
665 * with 'type' (read or write) is allowed
667 bool (*is_valid_access)(int off, int size, enum bpf_access_type type,
668 const struct bpf_prog *prog,
669 struct bpf_insn_access_aux *info);
670 int (*gen_prologue)(struct bpf_insn *insn, bool direct_write,
671 const struct bpf_prog *prog);
672 int (*gen_ld_abs)(const struct bpf_insn *orig,
673 struct bpf_insn *insn_buf);
674 u32 (*convert_ctx_access)(enum bpf_access_type type,
675 const struct bpf_insn *src,
676 struct bpf_insn *dst,
677 struct bpf_prog *prog, u32 *target_size);
678 int (*btf_struct_access)(struct bpf_verifier_log *log,
679 const struct btf *btf,
680 const struct btf_type *t, int off, int size,
681 enum bpf_access_type atype,
682 u32 *next_btf_id, enum bpf_type_flag *flag);
685 struct bpf_prog_offload_ops {
686 /* verifier basic callbacks */
687 int (*insn_hook)(struct bpf_verifier_env *env,
688 int insn_idx, int prev_insn_idx);
689 int (*finalize)(struct bpf_verifier_env *env);
690 /* verifier optimization callbacks (called after .finalize) */
691 int (*replace_insn)(struct bpf_verifier_env *env, u32 off,
692 struct bpf_insn *insn);
693 int (*remove_insns)(struct bpf_verifier_env *env, u32 off, u32 cnt);
694 /* program management callbacks */
695 int (*prepare)(struct bpf_prog *prog);
696 int (*translate)(struct bpf_prog *prog);
697 void (*destroy)(struct bpf_prog *prog);
700 struct bpf_prog_offload {
701 struct bpf_prog *prog;
702 struct net_device *netdev;
703 struct bpf_offload_dev *offdev;
705 struct list_head offloads;
712 enum bpf_cgroup_storage_type {
713 BPF_CGROUP_STORAGE_SHARED,
714 BPF_CGROUP_STORAGE_PERCPU,
715 __BPF_CGROUP_STORAGE_MAX
718 #define MAX_BPF_CGROUP_STORAGE_TYPE __BPF_CGROUP_STORAGE_MAX
720 /* The longest tracepoint has 12 args.
721 * See include/trace/bpf_probe.h
723 #define MAX_BPF_FUNC_ARGS 12
725 /* The maximum number of arguments passed through registers
726 * a single function may have.
728 #define MAX_BPF_FUNC_REG_ARGS 5
730 struct btf_func_model {
733 u8 arg_size[MAX_BPF_FUNC_ARGS];
736 /* Restore arguments before returning from trampoline to let original function
737 * continue executing. This flag is used for fentry progs when there are no
740 #define BPF_TRAMP_F_RESTORE_REGS BIT(0)
741 /* Call original function after fentry progs, but before fexit progs.
742 * Makes sense for fentry/fexit, normal calls and indirect calls.
744 #define BPF_TRAMP_F_CALL_ORIG BIT(1)
745 /* Skip current frame and return to parent. Makes sense for fentry/fexit
746 * programs only. Should not be used with normal calls and indirect calls.
748 #define BPF_TRAMP_F_SKIP_FRAME BIT(2)
749 /* Store IP address of the caller on the trampoline stack,
750 * so it's available for trampoline's programs.
752 #define BPF_TRAMP_F_IP_ARG BIT(3)
753 /* Return the return value of fentry prog. Only used by bpf_struct_ops. */
754 #define BPF_TRAMP_F_RET_FENTRY_RET BIT(4)
756 /* Get original function from stack instead of from provided direct address.
757 * Makes sense for trampolines with fexit or fmod_ret programs.
759 #define BPF_TRAMP_F_ORIG_STACK BIT(5)
761 /* This trampoline is on a function with another ftrace_ops with IPMODIFY,
762 * e.g., a live patch. This flag is set and cleared by ftrace call backs,
764 #define BPF_TRAMP_F_SHARE_IPMODIFY BIT(6)
766 /* Each call __bpf_prog_enter + call bpf_func + call __bpf_prog_exit is ~50
769 #define BPF_MAX_TRAMP_LINKS 38
771 struct bpf_tramp_links {
772 struct bpf_tramp_link *links[BPF_MAX_TRAMP_LINKS];
776 struct bpf_tramp_run_ctx;
778 /* Different use cases for BPF trampoline:
779 * 1. replace nop at the function entry (kprobe equivalent)
780 * flags = BPF_TRAMP_F_RESTORE_REGS
781 * fentry = a set of programs to run before returning from trampoline
783 * 2. replace nop at the function entry (kprobe + kretprobe equivalent)
784 * flags = BPF_TRAMP_F_CALL_ORIG | BPF_TRAMP_F_SKIP_FRAME
785 * orig_call = fentry_ip + MCOUNT_INSN_SIZE
786 * fentry = a set of program to run before calling original function
787 * fexit = a set of program to run after original function
789 * 3. replace direct call instruction anywhere in the function body
790 * or assign a function pointer for indirect call (like tcp_congestion_ops->cong_avoid)
792 * fentry = a set of programs to run before returning from trampoline
793 * With flags = BPF_TRAMP_F_CALL_ORIG
794 * orig_call = original callback addr or direct function addr
795 * fentry = a set of program to run before calling original function
796 * fexit = a set of program to run after original function
798 struct bpf_tramp_image;
799 int arch_prepare_bpf_trampoline(struct bpf_tramp_image *tr, void *image, void *image_end,
800 const struct btf_func_model *m, u32 flags,
801 struct bpf_tramp_links *tlinks,
803 /* these two functions are called from generated trampoline */
804 u64 notrace __bpf_prog_enter(struct bpf_prog *prog, struct bpf_tramp_run_ctx *run_ctx);
805 void notrace __bpf_prog_exit(struct bpf_prog *prog, u64 start, struct bpf_tramp_run_ctx *run_ctx);
806 u64 notrace __bpf_prog_enter_sleepable(struct bpf_prog *prog, struct bpf_tramp_run_ctx *run_ctx);
807 void notrace __bpf_prog_exit_sleepable(struct bpf_prog *prog, u64 start,
808 struct bpf_tramp_run_ctx *run_ctx);
809 u64 notrace __bpf_prog_enter_lsm_cgroup(struct bpf_prog *prog,
810 struct bpf_tramp_run_ctx *run_ctx);
811 void notrace __bpf_prog_exit_lsm_cgroup(struct bpf_prog *prog, u64 start,
812 struct bpf_tramp_run_ctx *run_ctx);
813 void notrace __bpf_tramp_enter(struct bpf_tramp_image *tr);
814 void notrace __bpf_tramp_exit(struct bpf_tramp_image *tr);
819 char name[KSYM_NAME_LEN];
820 struct list_head lnode;
821 struct latch_tree_node tnode;
825 enum bpf_tramp_prog_type {
828 BPF_TRAMP_MODIFY_RETURN,
830 BPF_TRAMP_REPLACE, /* more than MAX */
833 struct bpf_tramp_image {
835 struct bpf_ksym ksym;
836 struct percpu_ref pcref;
841 struct work_struct work;
845 struct bpf_trampoline {
846 /* hlist for trampoline_table */
847 struct hlist_node hlist;
848 struct ftrace_ops *fops;
849 /* serializes access to fields of this trampoline */
855 struct btf_func_model model;
859 /* if !NULL this is BPF_PROG_TYPE_EXT program that extends another BPF
860 * program by replacing one of its functions. func.addr is the address
861 * of the function it replaced.
863 struct bpf_prog *extension_prog;
864 /* list of BPF programs using this trampoline */
865 struct hlist_head progs_hlist[BPF_TRAMP_MAX];
866 /* Number of attached programs. A counter per kind. */
867 int progs_cnt[BPF_TRAMP_MAX];
868 /* Executable image of trampoline */
869 struct bpf_tramp_image *cur_image;
874 struct bpf_attach_target_info {
875 struct btf_func_model fmodel;
877 const char *tgt_name;
878 const struct btf_type *tgt_type;
881 #define BPF_DISPATCHER_MAX 48 /* Fits in 2048B */
883 struct bpf_dispatcher_prog {
884 struct bpf_prog *prog;
888 struct bpf_dispatcher {
889 /* dispatcher mutex */
892 struct bpf_dispatcher_prog progs[BPF_DISPATCHER_MAX];
897 struct bpf_ksym ksym;
898 #ifdef CONFIG_HAVE_STATIC_CALL
899 struct static_call_key *sc_key;
904 static __always_inline __nocfi unsigned int bpf_dispatcher_nop_func(
906 const struct bpf_insn *insnsi,
909 return bpf_func(ctx, insnsi);
912 #ifdef CONFIG_BPF_JIT
913 int bpf_trampoline_link_prog(struct bpf_tramp_link *link, struct bpf_trampoline *tr);
914 int bpf_trampoline_unlink_prog(struct bpf_tramp_link *link, struct bpf_trampoline *tr);
915 struct bpf_trampoline *bpf_trampoline_get(u64 key,
916 struct bpf_attach_target_info *tgt_info);
917 void bpf_trampoline_put(struct bpf_trampoline *tr);
918 int arch_prepare_bpf_dispatcher(void *image, void *buf, s64 *funcs, int num_funcs);
921 * When the architecture supports STATIC_CALL replace the bpf_dispatcher_fn
922 * indirection with a direct call to the bpf program. If the architecture does
923 * not have STATIC_CALL, avoid a double-indirection.
925 #ifdef CONFIG_HAVE_STATIC_CALL
927 #define __BPF_DISPATCHER_SC_INIT(_name) \
928 .sc_key = &STATIC_CALL_KEY(_name), \
929 .sc_tramp = STATIC_CALL_TRAMP_ADDR(_name),
931 #define __BPF_DISPATCHER_SC(name) \
932 DEFINE_STATIC_CALL(bpf_dispatcher_##name##_call, bpf_dispatcher_nop_func)
934 #define __BPF_DISPATCHER_CALL(name) \
935 static_call(bpf_dispatcher_##name##_call)(ctx, insnsi, bpf_func)
937 #define __BPF_DISPATCHER_UPDATE(_d, _new) \
938 __static_call_update((_d)->sc_key, (_d)->sc_tramp, (_new))
941 #define __BPF_DISPATCHER_SC_INIT(name)
942 #define __BPF_DISPATCHER_SC(name)
943 #define __BPF_DISPATCHER_CALL(name) bpf_func(ctx, insnsi)
944 #define __BPF_DISPATCHER_UPDATE(_d, _new)
947 #define BPF_DISPATCHER_INIT(_name) { \
948 .mutex = __MUTEX_INITIALIZER(_name.mutex), \
949 .func = &_name##_func, \
956 .lnode = LIST_HEAD_INIT(_name.ksym.lnode), \
958 __BPF_DISPATCHER_SC_INIT(_name##_call) \
961 #define DEFINE_BPF_DISPATCHER(name) \
962 __BPF_DISPATCHER_SC(name); \
963 noinline __nocfi unsigned int bpf_dispatcher_##name##_func( \
965 const struct bpf_insn *insnsi, \
966 bpf_func_t bpf_func) \
968 return __BPF_DISPATCHER_CALL(name); \
970 EXPORT_SYMBOL(bpf_dispatcher_##name##_func); \
971 struct bpf_dispatcher bpf_dispatcher_##name = \
972 BPF_DISPATCHER_INIT(bpf_dispatcher_##name);
974 #define DECLARE_BPF_DISPATCHER(name) \
975 unsigned int bpf_dispatcher_##name##_func( \
977 const struct bpf_insn *insnsi, \
978 bpf_func_t bpf_func); \
979 extern struct bpf_dispatcher bpf_dispatcher_##name;
981 #define BPF_DISPATCHER_FUNC(name) bpf_dispatcher_##name##_func
982 #define BPF_DISPATCHER_PTR(name) (&bpf_dispatcher_##name)
983 void bpf_dispatcher_change_prog(struct bpf_dispatcher *d, struct bpf_prog *from,
984 struct bpf_prog *to);
985 /* Called only from JIT-enabled code, so there's no need for stubs. */
986 void *bpf_jit_alloc_exec_page(void);
987 void bpf_image_ksym_add(void *data, struct bpf_ksym *ksym);
988 void bpf_image_ksym_del(struct bpf_ksym *ksym);
989 void bpf_ksym_add(struct bpf_ksym *ksym);
990 void bpf_ksym_del(struct bpf_ksym *ksym);
991 int bpf_jit_charge_modmem(u32 size);
992 void bpf_jit_uncharge_modmem(u32 size);
993 bool bpf_prog_has_trampoline(const struct bpf_prog *prog);
995 static inline int bpf_trampoline_link_prog(struct bpf_tramp_link *link,
996 struct bpf_trampoline *tr)
1000 static inline int bpf_trampoline_unlink_prog(struct bpf_tramp_link *link,
1001 struct bpf_trampoline *tr)
1005 static inline struct bpf_trampoline *bpf_trampoline_get(u64 key,
1006 struct bpf_attach_target_info *tgt_info)
1008 return ERR_PTR(-EOPNOTSUPP);
1010 static inline void bpf_trampoline_put(struct bpf_trampoline *tr) {}
1011 #define DEFINE_BPF_DISPATCHER(name)
1012 #define DECLARE_BPF_DISPATCHER(name)
1013 #define BPF_DISPATCHER_FUNC(name) bpf_dispatcher_nop_func
1014 #define BPF_DISPATCHER_PTR(name) NULL
1015 static inline void bpf_dispatcher_change_prog(struct bpf_dispatcher *d,
1016 struct bpf_prog *from,
1017 struct bpf_prog *to) {}
1018 static inline bool is_bpf_image_address(unsigned long address)
1022 static inline bool bpf_prog_has_trampoline(const struct bpf_prog *prog)
1028 struct bpf_func_info_aux {
1033 enum bpf_jit_poke_reason {
1034 BPF_POKE_REASON_TAIL_CALL,
1037 /* Descriptor of pokes pointing /into/ the JITed image. */
1038 struct bpf_jit_poke_descriptor {
1039 void *tailcall_target;
1040 void *tailcall_bypass;
1045 struct bpf_map *map;
1049 bool tailcall_target_stable;
1055 /* reg_type info for ctx arguments */
1056 struct bpf_ctx_arg_aux {
1058 enum bpf_reg_type reg_type;
1062 struct btf_mod_pair {
1064 struct module *module;
1067 struct bpf_kfunc_desc_tab;
1069 struct bpf_prog_aux {
1078 u32 func_cnt; /* used by non-func prog as the number of func progs */
1079 u32 func_idx; /* 0 for non-func prog, the index in func array for func prog */
1080 u32 attach_btf_id; /* in-kernel BTF type id to attach to */
1081 u32 ctx_arg_info_size;
1082 u32 max_rdonly_access;
1083 u32 max_rdwr_access;
1084 struct btf *attach_btf;
1085 const struct bpf_ctx_arg_aux *ctx_arg_info;
1086 struct mutex dst_mutex; /* protects dst_* pointers below, *after* prog becomes visible */
1087 struct bpf_prog *dst_prog;
1088 struct bpf_trampoline *dst_trampoline;
1089 enum bpf_prog_type saved_dst_prog_type;
1090 enum bpf_attach_type saved_dst_attach_type;
1091 bool verifier_zext; /* Zero extensions has been inserted by verifier. */
1092 bool offload_requested;
1093 bool attach_btf_trace; /* true if attaching to BTF-enabled raw tp */
1094 bool func_proto_unreliable;
1096 bool tail_call_reachable;
1098 /* BTF_KIND_FUNC_PROTO for valid attach_btf_id */
1099 const struct btf_type *attach_func_proto;
1100 /* function name for valid attach_btf_id */
1101 const char *attach_func_name;
1102 struct bpf_prog **func;
1103 void *jit_data; /* JIT specific data. arch dependent */
1104 struct bpf_jit_poke_descriptor *poke_tab;
1105 struct bpf_kfunc_desc_tab *kfunc_tab;
1106 struct bpf_kfunc_btf_tab *kfunc_btf_tab;
1108 struct bpf_ksym ksym;
1109 const struct bpf_prog_ops *ops;
1110 struct bpf_map **used_maps;
1111 struct mutex used_maps_mutex; /* mutex for used_maps and used_map_cnt */
1112 struct btf_mod_pair *used_btfs;
1113 struct bpf_prog *prog;
1114 struct user_struct *user;
1115 u64 load_time; /* ns since boottime */
1117 int cgroup_atype; /* enum cgroup_bpf_attach_type */
1118 struct bpf_map *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE];
1119 char name[BPF_OBJ_NAME_LEN];
1120 #ifdef CONFIG_SECURITY
1123 struct bpf_prog_offload *offload;
1125 struct bpf_func_info *func_info;
1126 struct bpf_func_info_aux *func_info_aux;
1127 /* bpf_line_info loaded from userspace. linfo->insn_off
1128 * has the xlated insn offset.
1129 * Both the main and sub prog share the same linfo.
1130 * The subprog can access its first linfo by
1131 * using the linfo_idx.
1133 struct bpf_line_info *linfo;
1134 /* jited_linfo is the jited addr of the linfo. It has a
1135 * one to one mapping to linfo:
1136 * jited_linfo[i] is the jited addr for the linfo[i]->insn_off.
1137 * Both the main and sub prog share the same jited_linfo.
1138 * The subprog can access its first jited_linfo by
1139 * using the linfo_idx.
1144 /* subprog can use linfo_idx to access its first linfo and
1146 * main prog always has linfo_idx == 0
1150 struct exception_table_entry *extable;
1152 struct work_struct work;
1153 struct rcu_head rcu;
1158 u16 pages; /* Number of allocated pages */
1159 u16 jited:1, /* Is our filter JIT'ed? */
1160 jit_requested:1,/* archs need to JIT the prog */
1161 gpl_compatible:1, /* Is filter GPL compatible? */
1162 cb_access:1, /* Is control block accessed? */
1163 dst_needed:1, /* Do we need dst entry? */
1164 blinding_requested:1, /* needs constant blinding */
1165 blinded:1, /* Was blinded */
1166 is_func:1, /* program is a bpf function */
1167 kprobe_override:1, /* Do we override a kprobe? */
1168 has_callchain_buf:1, /* callchain buffer allocated? */
1169 enforce_expected_attach_type:1, /* Enforce expected_attach_type checking at attach time */
1170 call_get_stack:1, /* Do we call bpf_get_stack() or bpf_get_stackid() */
1171 call_get_func_ip:1, /* Do we call get_func_ip() */
1172 tstamp_type_access:1; /* Accessed __sk_buff->tstamp_type */
1173 enum bpf_prog_type type; /* Type of BPF program */
1174 enum bpf_attach_type expected_attach_type; /* For some prog types */
1175 u32 len; /* Number of filter blocks */
1176 u32 jited_len; /* Size of jited insns in bytes */
1177 u8 tag[BPF_TAG_SIZE];
1178 struct bpf_prog_stats __percpu *stats;
1179 int __percpu *active;
1180 unsigned int (*bpf_func)(const void *ctx,
1181 const struct bpf_insn *insn);
1182 struct bpf_prog_aux *aux; /* Auxiliary fields */
1183 struct sock_fprog_kern *orig_prog; /* Original BPF program */
1184 /* Instructions for interpreter */
1186 DECLARE_FLEX_ARRAY(struct sock_filter, insns);
1187 DECLARE_FLEX_ARRAY(struct bpf_insn, insnsi);
1191 struct bpf_array_aux {
1192 /* Programs with direct jumps into programs part of this array. */
1193 struct list_head poke_progs;
1194 struct bpf_map *map;
1195 struct mutex poke_mutex;
1196 struct work_struct work;
1202 enum bpf_link_type type;
1203 const struct bpf_link_ops *ops;
1204 struct bpf_prog *prog;
1205 struct work_struct work;
1208 struct bpf_link_ops {
1209 void (*release)(struct bpf_link *link);
1210 void (*dealloc)(struct bpf_link *link);
1211 int (*detach)(struct bpf_link *link);
1212 int (*update_prog)(struct bpf_link *link, struct bpf_prog *new_prog,
1213 struct bpf_prog *old_prog);
1214 void (*show_fdinfo)(const struct bpf_link *link, struct seq_file *seq);
1215 int (*fill_link_info)(const struct bpf_link *link,
1216 struct bpf_link_info *info);
1219 struct bpf_tramp_link {
1220 struct bpf_link link;
1221 struct hlist_node tramp_hlist;
1225 struct bpf_shim_tramp_link {
1226 struct bpf_tramp_link link;
1227 struct bpf_trampoline *trampoline;
1230 struct bpf_tracing_link {
1231 struct bpf_tramp_link link;
1232 enum bpf_attach_type attach_type;
1233 struct bpf_trampoline *trampoline;
1234 struct bpf_prog *tgt_prog;
1237 struct bpf_link_primer {
1238 struct bpf_link *link;
1244 struct bpf_struct_ops_value;
1247 #define BPF_STRUCT_OPS_MAX_NR_MEMBERS 64
1248 struct bpf_struct_ops {
1249 const struct bpf_verifier_ops *verifier_ops;
1250 int (*init)(struct btf *btf);
1251 int (*check_member)(const struct btf_type *t,
1252 const struct btf_member *member);
1253 int (*init_member)(const struct btf_type *t,
1254 const struct btf_member *member,
1255 void *kdata, const void *udata);
1256 int (*reg)(void *kdata);
1257 void (*unreg)(void *kdata);
1258 const struct btf_type *type;
1259 const struct btf_type *value_type;
1261 struct btf_func_model func_models[BPF_STRUCT_OPS_MAX_NR_MEMBERS];
1266 #if defined(CONFIG_BPF_JIT) && defined(CONFIG_BPF_SYSCALL)
1267 #define BPF_MODULE_OWNER ((void *)((0xeB9FUL << 2) + POISON_POINTER_DELTA))
1268 const struct bpf_struct_ops *bpf_struct_ops_find(u32 type_id);
1269 void bpf_struct_ops_init(struct btf *btf, struct bpf_verifier_log *log);
1270 bool bpf_struct_ops_get(const void *kdata);
1271 void bpf_struct_ops_put(const void *kdata);
1272 int bpf_struct_ops_map_sys_lookup_elem(struct bpf_map *map, void *key,
1274 int bpf_struct_ops_prepare_trampoline(struct bpf_tramp_links *tlinks,
1275 struct bpf_tramp_link *link,
1276 const struct btf_func_model *model,
1277 void *image, void *image_end);
1278 static inline bool bpf_try_module_get(const void *data, struct module *owner)
1280 if (owner == BPF_MODULE_OWNER)
1281 return bpf_struct_ops_get(data);
1283 return try_module_get(owner);
1285 static inline void bpf_module_put(const void *data, struct module *owner)
1287 if (owner == BPF_MODULE_OWNER)
1288 bpf_struct_ops_put(data);
1294 /* Define it here to avoid the use of forward declaration */
1295 struct bpf_dummy_ops_state {
1299 struct bpf_dummy_ops {
1300 int (*test_1)(struct bpf_dummy_ops_state *cb);
1301 int (*test_2)(struct bpf_dummy_ops_state *cb, int a1, unsigned short a2,
1302 char a3, unsigned long a4);
1305 int bpf_struct_ops_test_run(struct bpf_prog *prog, const union bpf_attr *kattr,
1306 union bpf_attr __user *uattr);
1309 static inline const struct bpf_struct_ops *bpf_struct_ops_find(u32 type_id)
1313 static inline void bpf_struct_ops_init(struct btf *btf,
1314 struct bpf_verifier_log *log)
1317 static inline bool bpf_try_module_get(const void *data, struct module *owner)
1319 return try_module_get(owner);
1321 static inline void bpf_module_put(const void *data, struct module *owner)
1325 static inline int bpf_struct_ops_map_sys_lookup_elem(struct bpf_map *map,
1333 #if defined(CONFIG_CGROUP_BPF) && defined(CONFIG_BPF_LSM)
1334 int bpf_trampoline_link_cgroup_shim(struct bpf_prog *prog,
1336 void bpf_trampoline_unlink_cgroup_shim(struct bpf_prog *prog);
1338 static inline int bpf_trampoline_link_cgroup_shim(struct bpf_prog *prog,
1343 static inline void bpf_trampoline_unlink_cgroup_shim(struct bpf_prog *prog)
1352 struct bpf_array_aux *aux;
1354 char value[0] __aligned(8);
1355 void *ptrs[0] __aligned(8);
1356 void __percpu *pptrs[0] __aligned(8);
1360 #define BPF_COMPLEXITY_LIMIT_INSNS 1000000 /* yes. 1M insns */
1361 #define MAX_TAIL_CALL_CNT 33
1363 /* Maximum number of loops for bpf_loop */
1364 #define BPF_MAX_LOOPS BIT(23)
1366 #define BPF_F_ACCESS_MASK (BPF_F_RDONLY | \
1367 BPF_F_RDONLY_PROG | \
1371 #define BPF_MAP_CAN_READ BIT(0)
1372 #define BPF_MAP_CAN_WRITE BIT(1)
1374 static inline u32 bpf_map_flags_to_cap(struct bpf_map *map)
1376 u32 access_flags = map->map_flags & (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG);
1378 /* Combination of BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG is
1381 if (access_flags & BPF_F_RDONLY_PROG)
1382 return BPF_MAP_CAN_READ;
1383 else if (access_flags & BPF_F_WRONLY_PROG)
1384 return BPF_MAP_CAN_WRITE;
1386 return BPF_MAP_CAN_READ | BPF_MAP_CAN_WRITE;
1389 static inline bool bpf_map_flags_access_ok(u32 access_flags)
1391 return (access_flags & (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG)) !=
1392 (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG);
1395 struct bpf_event_entry {
1396 struct perf_event *event;
1397 struct file *perf_file;
1398 struct file *map_file;
1399 struct rcu_head rcu;
1402 static inline bool map_type_contains_progs(struct bpf_map *map)
1404 return map->map_type == BPF_MAP_TYPE_PROG_ARRAY ||
1405 map->map_type == BPF_MAP_TYPE_DEVMAP ||
1406 map->map_type == BPF_MAP_TYPE_CPUMAP;
1409 bool bpf_prog_map_compatible(struct bpf_map *map, const struct bpf_prog *fp);
1410 int bpf_prog_calc_tag(struct bpf_prog *fp);
1412 const struct bpf_func_proto *bpf_get_trace_printk_proto(void);
1413 const struct bpf_func_proto *bpf_get_trace_vprintk_proto(void);
1415 typedef unsigned long (*bpf_ctx_copy_t)(void *dst, const void *src,
1416 unsigned long off, unsigned long len);
1417 typedef u32 (*bpf_convert_ctx_access_t)(enum bpf_access_type type,
1418 const struct bpf_insn *src,
1419 struct bpf_insn *dst,
1420 struct bpf_prog *prog,
1423 u64 bpf_event_output(struct bpf_map *map, u64 flags, void *meta, u64 meta_size,
1424 void *ctx, u64 ctx_size, bpf_ctx_copy_t ctx_copy);
1426 /* an array of programs to be executed under rcu_lock.
1429 * ret = bpf_prog_run_array(rcu_dereference(&bpf_prog_array), ctx, bpf_prog_run);
1431 * the structure returned by bpf_prog_array_alloc() should be populated
1432 * with program pointers and the last pointer must be NULL.
1433 * The user has to keep refcnt on the program and make sure the program
1434 * is removed from the array before bpf_prog_put().
1435 * The 'struct bpf_prog_array *' should only be replaced with xchg()
1436 * since other cpus are walking the array of pointers in parallel.
1438 struct bpf_prog_array_item {
1439 struct bpf_prog *prog;
1441 struct bpf_cgroup_storage *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE];
1446 struct bpf_prog_array {
1447 struct rcu_head rcu;
1448 struct bpf_prog_array_item items[];
1451 struct bpf_empty_prog_array {
1452 struct bpf_prog_array hdr;
1453 struct bpf_prog *null_prog;
1456 /* to avoid allocating empty bpf_prog_array for cgroups that
1457 * don't have bpf program attached use one global 'bpf_empty_prog_array'
1458 * It will not be modified the caller of bpf_prog_array_alloc()
1459 * (since caller requested prog_cnt == 0)
1460 * that pointer should be 'freed' by bpf_prog_array_free()
1462 extern struct bpf_empty_prog_array bpf_empty_prog_array;
1464 struct bpf_prog_array *bpf_prog_array_alloc(u32 prog_cnt, gfp_t flags);
1465 void bpf_prog_array_free(struct bpf_prog_array *progs);
1466 /* Use when traversal over the bpf_prog_array uses tasks_trace rcu */
1467 void bpf_prog_array_free_sleepable(struct bpf_prog_array *progs);
1468 int bpf_prog_array_length(struct bpf_prog_array *progs);
1469 bool bpf_prog_array_is_empty(struct bpf_prog_array *array);
1470 int bpf_prog_array_copy_to_user(struct bpf_prog_array *progs,
1471 __u32 __user *prog_ids, u32 cnt);
1473 void bpf_prog_array_delete_safe(struct bpf_prog_array *progs,
1474 struct bpf_prog *old_prog);
1475 int bpf_prog_array_delete_safe_at(struct bpf_prog_array *array, int index);
1476 int bpf_prog_array_update_at(struct bpf_prog_array *array, int index,
1477 struct bpf_prog *prog);
1478 int bpf_prog_array_copy_info(struct bpf_prog_array *array,
1479 u32 *prog_ids, u32 request_cnt,
1481 int bpf_prog_array_copy(struct bpf_prog_array *old_array,
1482 struct bpf_prog *exclude_prog,
1483 struct bpf_prog *include_prog,
1485 struct bpf_prog_array **new_array);
1487 struct bpf_run_ctx {};
1489 struct bpf_cg_run_ctx {
1490 struct bpf_run_ctx run_ctx;
1491 const struct bpf_prog_array_item *prog_item;
1495 struct bpf_trace_run_ctx {
1496 struct bpf_run_ctx run_ctx;
1500 struct bpf_tramp_run_ctx {
1501 struct bpf_run_ctx run_ctx;
1503 struct bpf_run_ctx *saved_run_ctx;
1506 static inline struct bpf_run_ctx *bpf_set_run_ctx(struct bpf_run_ctx *new_ctx)
1508 struct bpf_run_ctx *old_ctx = NULL;
1510 #ifdef CONFIG_BPF_SYSCALL
1511 old_ctx = current->bpf_ctx;
1512 current->bpf_ctx = new_ctx;
1517 static inline void bpf_reset_run_ctx(struct bpf_run_ctx *old_ctx)
1519 #ifdef CONFIG_BPF_SYSCALL
1520 current->bpf_ctx = old_ctx;
1524 /* BPF program asks to bypass CAP_NET_BIND_SERVICE in bind. */
1525 #define BPF_RET_BIND_NO_CAP_NET_BIND_SERVICE (1 << 0)
1526 /* BPF program asks to set CN on the packet. */
1527 #define BPF_RET_SET_CN (1 << 0)
1529 typedef u32 (*bpf_prog_run_fn)(const struct bpf_prog *prog, const void *ctx);
1531 static __always_inline u32
1532 bpf_prog_run_array(const struct bpf_prog_array *array,
1533 const void *ctx, bpf_prog_run_fn run_prog)
1535 const struct bpf_prog_array_item *item;
1536 const struct bpf_prog *prog;
1537 struct bpf_run_ctx *old_run_ctx;
1538 struct bpf_trace_run_ctx run_ctx;
1541 RCU_LOCKDEP_WARN(!rcu_read_lock_held(), "no rcu lock held");
1543 if (unlikely(!array))
1547 old_run_ctx = bpf_set_run_ctx(&run_ctx.run_ctx);
1548 item = &array->items[0];
1549 while ((prog = READ_ONCE(item->prog))) {
1550 run_ctx.bpf_cookie = item->bpf_cookie;
1551 ret &= run_prog(prog, ctx);
1554 bpf_reset_run_ctx(old_run_ctx);
1559 /* Notes on RCU design for bpf_prog_arrays containing sleepable programs:
1561 * We use the tasks_trace rcu flavor read section to protect the bpf_prog_array
1562 * overall. As a result, we must use the bpf_prog_array_free_sleepable
1563 * in order to use the tasks_trace rcu grace period.
1565 * When a non-sleepable program is inside the array, we take the rcu read
1566 * section and disable preemption for that program alone, so it can access
1567 * rcu-protected dynamically sized maps.
1569 static __always_inline u32
1570 bpf_prog_run_array_sleepable(const struct bpf_prog_array __rcu *array_rcu,
1571 const void *ctx, bpf_prog_run_fn run_prog)
1573 const struct bpf_prog_array_item *item;
1574 const struct bpf_prog *prog;
1575 const struct bpf_prog_array *array;
1576 struct bpf_run_ctx *old_run_ctx;
1577 struct bpf_trace_run_ctx run_ctx;
1582 rcu_read_lock_trace();
1585 array = rcu_dereference_check(array_rcu, rcu_read_lock_trace_held());
1586 if (unlikely(!array))
1588 old_run_ctx = bpf_set_run_ctx(&run_ctx.run_ctx);
1589 item = &array->items[0];
1590 while ((prog = READ_ONCE(item->prog))) {
1591 if (!prog->aux->sleepable)
1594 run_ctx.bpf_cookie = item->bpf_cookie;
1595 ret &= run_prog(prog, ctx);
1598 if (!prog->aux->sleepable)
1601 bpf_reset_run_ctx(old_run_ctx);
1604 rcu_read_unlock_trace();
1608 #ifdef CONFIG_BPF_SYSCALL
1609 DECLARE_PER_CPU(int, bpf_prog_active);
1610 extern struct mutex bpf_stats_enabled_mutex;
1613 * Block execution of BPF programs attached to instrumentation (perf,
1614 * kprobes, tracepoints) to prevent deadlocks on map operations as any of
1615 * these events can happen inside a region which holds a map bucket lock
1616 * and can deadlock on it.
1618 static inline void bpf_disable_instrumentation(void)
1621 this_cpu_inc(bpf_prog_active);
1624 static inline void bpf_enable_instrumentation(void)
1626 this_cpu_dec(bpf_prog_active);
1630 extern const struct file_operations bpf_map_fops;
1631 extern const struct file_operations bpf_prog_fops;
1632 extern const struct file_operations bpf_iter_fops;
1634 #define BPF_PROG_TYPE(_id, _name, prog_ctx_type, kern_ctx_type) \
1635 extern const struct bpf_prog_ops _name ## _prog_ops; \
1636 extern const struct bpf_verifier_ops _name ## _verifier_ops;
1637 #define BPF_MAP_TYPE(_id, _ops) \
1638 extern const struct bpf_map_ops _ops;
1639 #define BPF_LINK_TYPE(_id, _name)
1640 #include <linux/bpf_types.h>
1641 #undef BPF_PROG_TYPE
1643 #undef BPF_LINK_TYPE
1645 extern const struct bpf_prog_ops bpf_offload_prog_ops;
1646 extern const struct bpf_verifier_ops tc_cls_act_analyzer_ops;
1647 extern const struct bpf_verifier_ops xdp_analyzer_ops;
1649 struct bpf_prog *bpf_prog_get(u32 ufd);
1650 struct bpf_prog *bpf_prog_get_type_dev(u32 ufd, enum bpf_prog_type type,
1652 void bpf_prog_add(struct bpf_prog *prog, int i);
1653 void bpf_prog_sub(struct bpf_prog *prog, int i);
1654 void bpf_prog_inc(struct bpf_prog *prog);
1655 struct bpf_prog * __must_check bpf_prog_inc_not_zero(struct bpf_prog *prog);
1656 void bpf_prog_put(struct bpf_prog *prog);
1658 void bpf_prog_free_id(struct bpf_prog *prog, bool do_idr_lock);
1659 void bpf_map_free_id(struct bpf_map *map, bool do_idr_lock);
1661 struct bpf_map_value_off_desc *bpf_map_kptr_off_contains(struct bpf_map *map, u32 offset);
1662 void bpf_map_free_kptr_off_tab(struct bpf_map *map);
1663 struct bpf_map_value_off *bpf_map_copy_kptr_off_tab(const struct bpf_map *map);
1664 bool bpf_map_equal_kptr_off_tab(const struct bpf_map *map_a, const struct bpf_map *map_b);
1665 void bpf_map_free_kptrs(struct bpf_map *map, void *map_value);
1667 struct bpf_map *bpf_map_get(u32 ufd);
1668 struct bpf_map *bpf_map_get_with_uref(u32 ufd);
1669 struct bpf_map *__bpf_map_get(struct fd f);
1670 void bpf_map_inc(struct bpf_map *map);
1671 void bpf_map_inc_with_uref(struct bpf_map *map);
1672 struct bpf_map * __must_check bpf_map_inc_not_zero(struct bpf_map *map);
1673 void bpf_map_put_with_uref(struct bpf_map *map);
1674 void bpf_map_put(struct bpf_map *map);
1675 void *bpf_map_area_alloc(u64 size, int numa_node);
1676 void *bpf_map_area_mmapable_alloc(u64 size, int numa_node);
1677 void bpf_map_area_free(void *base);
1678 bool bpf_map_write_active(const struct bpf_map *map);
1679 void bpf_map_init_from_attr(struct bpf_map *map, union bpf_attr *attr);
1680 int generic_map_lookup_batch(struct bpf_map *map,
1681 const union bpf_attr *attr,
1682 union bpf_attr __user *uattr);
1683 int generic_map_update_batch(struct bpf_map *map,
1684 const union bpf_attr *attr,
1685 union bpf_attr __user *uattr);
1686 int generic_map_delete_batch(struct bpf_map *map,
1687 const union bpf_attr *attr,
1688 union bpf_attr __user *uattr);
1689 struct bpf_map *bpf_map_get_curr_or_next(u32 *id);
1690 struct bpf_prog *bpf_prog_get_curr_or_next(u32 *id);
1692 #ifdef CONFIG_MEMCG_KMEM
1693 void *bpf_map_kmalloc_node(const struct bpf_map *map, size_t size, gfp_t flags,
1695 void *bpf_map_kzalloc(const struct bpf_map *map, size_t size, gfp_t flags);
1696 void __percpu *bpf_map_alloc_percpu(const struct bpf_map *map, size_t size,
1697 size_t align, gfp_t flags);
1699 static inline void *
1700 bpf_map_kmalloc_node(const struct bpf_map *map, size_t size, gfp_t flags,
1703 return kmalloc_node(size, flags, node);
1706 static inline void *
1707 bpf_map_kzalloc(const struct bpf_map *map, size_t size, gfp_t flags)
1709 return kzalloc(size, flags);
1712 static inline void __percpu *
1713 bpf_map_alloc_percpu(const struct bpf_map *map, size_t size, size_t align,
1716 return __alloc_percpu_gfp(size, align, flags);
1720 extern int sysctl_unprivileged_bpf_disabled;
1722 static inline bool bpf_allow_ptr_leaks(void)
1724 return perfmon_capable();
1727 static inline bool bpf_allow_uninit_stack(void)
1729 return perfmon_capable();
1732 static inline bool bpf_allow_ptr_to_map_access(void)
1734 return perfmon_capable();
1737 static inline bool bpf_bypass_spec_v1(void)
1739 return perfmon_capable();
1742 static inline bool bpf_bypass_spec_v4(void)
1744 return perfmon_capable();
1747 int bpf_map_new_fd(struct bpf_map *map, int flags);
1748 int bpf_prog_new_fd(struct bpf_prog *prog);
1750 void bpf_link_init(struct bpf_link *link, enum bpf_link_type type,
1751 const struct bpf_link_ops *ops, struct bpf_prog *prog);
1752 int bpf_link_prime(struct bpf_link *link, struct bpf_link_primer *primer);
1753 int bpf_link_settle(struct bpf_link_primer *primer);
1754 void bpf_link_cleanup(struct bpf_link_primer *primer);
1755 void bpf_link_inc(struct bpf_link *link);
1756 void bpf_link_put(struct bpf_link *link);
1757 int bpf_link_new_fd(struct bpf_link *link);
1758 struct file *bpf_link_new_file(struct bpf_link *link, int *reserved_fd);
1759 struct bpf_link *bpf_link_get_from_fd(u32 ufd);
1760 struct bpf_link *bpf_link_get_curr_or_next(u32 *id);
1762 int bpf_obj_pin_user(u32 ufd, const char __user *pathname);
1763 int bpf_obj_get_user(const char __user *pathname, int flags);
1765 #define BPF_ITER_FUNC_PREFIX "bpf_iter_"
1766 #define DEFINE_BPF_ITER_FUNC(target, args...) \
1767 extern int bpf_iter_ ## target(args); \
1768 int __init bpf_iter_ ## target(args) { return 0; }
1770 struct bpf_iter_aux_info {
1771 struct bpf_map *map;
1774 typedef int (*bpf_iter_attach_target_t)(struct bpf_prog *prog,
1775 union bpf_iter_link_info *linfo,
1776 struct bpf_iter_aux_info *aux);
1777 typedef void (*bpf_iter_detach_target_t)(struct bpf_iter_aux_info *aux);
1778 typedef void (*bpf_iter_show_fdinfo_t) (const struct bpf_iter_aux_info *aux,
1779 struct seq_file *seq);
1780 typedef int (*bpf_iter_fill_link_info_t)(const struct bpf_iter_aux_info *aux,
1781 struct bpf_link_info *info);
1782 typedef const struct bpf_func_proto *
1783 (*bpf_iter_get_func_proto_t)(enum bpf_func_id func_id,
1784 const struct bpf_prog *prog);
1786 enum bpf_iter_feature {
1787 BPF_ITER_RESCHED = BIT(0),
1790 #define BPF_ITER_CTX_ARG_MAX 2
1791 struct bpf_iter_reg {
1793 bpf_iter_attach_target_t attach_target;
1794 bpf_iter_detach_target_t detach_target;
1795 bpf_iter_show_fdinfo_t show_fdinfo;
1796 bpf_iter_fill_link_info_t fill_link_info;
1797 bpf_iter_get_func_proto_t get_func_proto;
1798 u32 ctx_arg_info_size;
1800 struct bpf_ctx_arg_aux ctx_arg_info[BPF_ITER_CTX_ARG_MAX];
1801 const struct bpf_iter_seq_info *seq_info;
1804 struct bpf_iter_meta {
1805 __bpf_md_ptr(struct seq_file *, seq);
1810 struct bpf_iter__bpf_map_elem {
1811 __bpf_md_ptr(struct bpf_iter_meta *, meta);
1812 __bpf_md_ptr(struct bpf_map *, map);
1813 __bpf_md_ptr(void *, key);
1814 __bpf_md_ptr(void *, value);
1817 int bpf_iter_reg_target(const struct bpf_iter_reg *reg_info);
1818 void bpf_iter_unreg_target(const struct bpf_iter_reg *reg_info);
1819 bool bpf_iter_prog_supported(struct bpf_prog *prog);
1820 const struct bpf_func_proto *
1821 bpf_iter_get_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog);
1822 int bpf_iter_link_attach(const union bpf_attr *attr, bpfptr_t uattr, struct bpf_prog *prog);
1823 int bpf_iter_new_fd(struct bpf_link *link);
1824 bool bpf_link_is_iter(struct bpf_link *link);
1825 struct bpf_prog *bpf_iter_get_info(struct bpf_iter_meta *meta, bool in_stop);
1826 int bpf_iter_run_prog(struct bpf_prog *prog, void *ctx);
1827 void bpf_iter_map_show_fdinfo(const struct bpf_iter_aux_info *aux,
1828 struct seq_file *seq);
1829 int bpf_iter_map_fill_link_info(const struct bpf_iter_aux_info *aux,
1830 struct bpf_link_info *info);
1832 int map_set_for_each_callback_args(struct bpf_verifier_env *env,
1833 struct bpf_func_state *caller,
1834 struct bpf_func_state *callee);
1836 int bpf_percpu_hash_copy(struct bpf_map *map, void *key, void *value);
1837 int bpf_percpu_array_copy(struct bpf_map *map, void *key, void *value);
1838 int bpf_percpu_hash_update(struct bpf_map *map, void *key, void *value,
1840 int bpf_percpu_array_update(struct bpf_map *map, void *key, void *value,
1843 int bpf_stackmap_copy(struct bpf_map *map, void *key, void *value);
1845 int bpf_fd_array_map_update_elem(struct bpf_map *map, struct file *map_file,
1846 void *key, void *value, u64 map_flags);
1847 int bpf_fd_array_map_lookup_elem(struct bpf_map *map, void *key, u32 *value);
1848 int bpf_fd_htab_map_update_elem(struct bpf_map *map, struct file *map_file,
1849 void *key, void *value, u64 map_flags);
1850 int bpf_fd_htab_map_lookup_elem(struct bpf_map *map, void *key, u32 *value);
1852 int bpf_get_file_flag(int flags);
1853 int bpf_check_uarg_tail_zero(bpfptr_t uaddr, size_t expected_size,
1854 size_t actual_size);
1856 /* memcpy that is used with 8-byte aligned pointers, power-of-8 size and
1857 * forced to use 'long' read/writes to try to atomically copy long counters.
1858 * Best-effort only. No barriers here, since it _will_ race with concurrent
1859 * updates from BPF programs. Called from bpf syscall and mostly used with
1860 * size 8 or 16 bytes, so ask compiler to inline it.
1862 static inline void bpf_long_memcpy(void *dst, const void *src, u32 size)
1864 const long *lsrc = src;
1867 size /= sizeof(long);
1872 /* verify correctness of eBPF program */
1873 int bpf_check(struct bpf_prog **fp, union bpf_attr *attr, bpfptr_t uattr);
1875 #ifndef CONFIG_BPF_JIT_ALWAYS_ON
1876 void bpf_patch_call_args(struct bpf_insn *insn, u32 stack_depth);
1879 struct btf *bpf_get_btf_vmlinux(void);
1884 struct bpf_dtab_netdev;
1885 struct bpf_cpu_map_entry;
1887 void __dev_flush(void);
1888 int dev_xdp_enqueue(struct net_device *dev, struct xdp_frame *xdpf,
1889 struct net_device *dev_rx);
1890 int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_frame *xdpf,
1891 struct net_device *dev_rx);
1892 int dev_map_enqueue_multi(struct xdp_frame *xdpf, struct net_device *dev_rx,
1893 struct bpf_map *map, bool exclude_ingress);
1894 int dev_map_generic_redirect(struct bpf_dtab_netdev *dst, struct sk_buff *skb,
1895 struct bpf_prog *xdp_prog);
1896 int dev_map_redirect_multi(struct net_device *dev, struct sk_buff *skb,
1897 struct bpf_prog *xdp_prog, struct bpf_map *map,
1898 bool exclude_ingress);
1900 void __cpu_map_flush(void);
1901 int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu, struct xdp_frame *xdpf,
1902 struct net_device *dev_rx);
1903 int cpu_map_generic_redirect(struct bpf_cpu_map_entry *rcpu,
1904 struct sk_buff *skb);
1906 /* Return map's numa specified by userspace */
1907 static inline int bpf_map_attr_numa_node(const union bpf_attr *attr)
1909 return (attr->map_flags & BPF_F_NUMA_NODE) ?
1910 attr->numa_node : NUMA_NO_NODE;
1913 struct bpf_prog *bpf_prog_get_type_path(const char *name, enum bpf_prog_type type);
1914 int array_map_alloc_check(union bpf_attr *attr);
1916 int bpf_prog_test_run_xdp(struct bpf_prog *prog, const union bpf_attr *kattr,
1917 union bpf_attr __user *uattr);
1918 int bpf_prog_test_run_skb(struct bpf_prog *prog, const union bpf_attr *kattr,
1919 union bpf_attr __user *uattr);
1920 int bpf_prog_test_run_tracing(struct bpf_prog *prog,
1921 const union bpf_attr *kattr,
1922 union bpf_attr __user *uattr);
1923 int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog,
1924 const union bpf_attr *kattr,
1925 union bpf_attr __user *uattr);
1926 int bpf_prog_test_run_raw_tp(struct bpf_prog *prog,
1927 const union bpf_attr *kattr,
1928 union bpf_attr __user *uattr);
1929 int bpf_prog_test_run_sk_lookup(struct bpf_prog *prog,
1930 const union bpf_attr *kattr,
1931 union bpf_attr __user *uattr);
1932 bool btf_ctx_access(int off, int size, enum bpf_access_type type,
1933 const struct bpf_prog *prog,
1934 struct bpf_insn_access_aux *info);
1936 static inline bool bpf_tracing_ctx_access(int off, int size,
1937 enum bpf_access_type type)
1939 if (off < 0 || off >= sizeof(__u64) * MAX_BPF_FUNC_ARGS)
1941 if (type != BPF_READ)
1943 if (off % size != 0)
1948 static inline bool bpf_tracing_btf_ctx_access(int off, int size,
1949 enum bpf_access_type type,
1950 const struct bpf_prog *prog,
1951 struct bpf_insn_access_aux *info)
1953 if (!bpf_tracing_ctx_access(off, size, type))
1955 return btf_ctx_access(off, size, type, prog, info);
1958 int btf_struct_access(struct bpf_verifier_log *log, const struct btf *btf,
1959 const struct btf_type *t, int off, int size,
1960 enum bpf_access_type atype,
1961 u32 *next_btf_id, enum bpf_type_flag *flag);
1962 bool btf_struct_ids_match(struct bpf_verifier_log *log,
1963 const struct btf *btf, u32 id, int off,
1964 const struct btf *need_btf, u32 need_type_id,
1967 int btf_distill_func_proto(struct bpf_verifier_log *log,
1969 const struct btf_type *func_proto,
1970 const char *func_name,
1971 struct btf_func_model *m);
1973 struct bpf_reg_state;
1974 int btf_check_subprog_arg_match(struct bpf_verifier_env *env, int subprog,
1975 struct bpf_reg_state *regs);
1976 int btf_check_kfunc_arg_match(struct bpf_verifier_env *env,
1977 const struct btf *btf, u32 func_id,
1978 struct bpf_reg_state *regs,
1980 int btf_prepare_func_args(struct bpf_verifier_env *env, int subprog,
1981 struct bpf_reg_state *reg);
1982 int btf_check_type_match(struct bpf_verifier_log *log, const struct bpf_prog *prog,
1983 struct btf *btf, const struct btf_type *t);
1985 struct bpf_prog *bpf_prog_by_id(u32 id);
1986 struct bpf_link *bpf_link_by_id(u32 id);
1988 const struct bpf_func_proto *bpf_base_func_proto(enum bpf_func_id func_id);
1989 void bpf_task_storage_free(struct task_struct *task);
1990 bool bpf_prog_has_kfunc_call(const struct bpf_prog *prog);
1991 const struct btf_func_model *
1992 bpf_jit_find_kfunc_model(const struct bpf_prog *prog,
1993 const struct bpf_insn *insn);
1994 struct bpf_core_ctx {
1995 struct bpf_verifier_log *log;
1996 const struct btf *btf;
1999 int bpf_core_apply(struct bpf_core_ctx *ctx, const struct bpf_core_relo *relo,
2000 int relo_idx, void *insn);
2002 static inline bool unprivileged_ebpf_enabled(void)
2004 return !sysctl_unprivileged_bpf_disabled;
2007 void notrace bpf_prog_inc_misses_counter(struct bpf_prog *prog);
2008 #else /* !CONFIG_BPF_SYSCALL */
2009 static inline struct bpf_prog *bpf_prog_get(u32 ufd)
2011 return ERR_PTR(-EOPNOTSUPP);
2014 static inline struct bpf_prog *bpf_prog_get_type_dev(u32 ufd,
2015 enum bpf_prog_type type,
2018 return ERR_PTR(-EOPNOTSUPP);
2021 static inline void bpf_prog_add(struct bpf_prog *prog, int i)
2025 static inline void bpf_prog_sub(struct bpf_prog *prog, int i)
2029 static inline void bpf_prog_put(struct bpf_prog *prog)
2033 static inline void bpf_prog_inc(struct bpf_prog *prog)
2037 static inline struct bpf_prog *__must_check
2038 bpf_prog_inc_not_zero(struct bpf_prog *prog)
2040 return ERR_PTR(-EOPNOTSUPP);
2043 static inline void bpf_link_init(struct bpf_link *link, enum bpf_link_type type,
2044 const struct bpf_link_ops *ops,
2045 struct bpf_prog *prog)
2049 static inline int bpf_link_prime(struct bpf_link *link,
2050 struct bpf_link_primer *primer)
2055 static inline int bpf_link_settle(struct bpf_link_primer *primer)
2060 static inline void bpf_link_cleanup(struct bpf_link_primer *primer)
2064 static inline void bpf_link_inc(struct bpf_link *link)
2068 static inline void bpf_link_put(struct bpf_link *link)
2072 static inline int bpf_obj_get_user(const char __user *pathname, int flags)
2077 static inline void __dev_flush(void)
2082 struct bpf_dtab_netdev;
2083 struct bpf_cpu_map_entry;
2086 int dev_xdp_enqueue(struct net_device *dev, struct xdp_frame *xdpf,
2087 struct net_device *dev_rx)
2093 int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_frame *xdpf,
2094 struct net_device *dev_rx)
2100 int dev_map_enqueue_multi(struct xdp_frame *xdpf, struct net_device *dev_rx,
2101 struct bpf_map *map, bool exclude_ingress)
2108 static inline int dev_map_generic_redirect(struct bpf_dtab_netdev *dst,
2109 struct sk_buff *skb,
2110 struct bpf_prog *xdp_prog)
2116 int dev_map_redirect_multi(struct net_device *dev, struct sk_buff *skb,
2117 struct bpf_prog *xdp_prog, struct bpf_map *map,
2118 bool exclude_ingress)
2123 static inline void __cpu_map_flush(void)
2127 static inline int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu,
2128 struct xdp_frame *xdpf,
2129 struct net_device *dev_rx)
2134 static inline int cpu_map_generic_redirect(struct bpf_cpu_map_entry *rcpu,
2135 struct sk_buff *skb)
2140 static inline struct bpf_prog *bpf_prog_get_type_path(const char *name,
2141 enum bpf_prog_type type)
2143 return ERR_PTR(-EOPNOTSUPP);
2146 static inline int bpf_prog_test_run_xdp(struct bpf_prog *prog,
2147 const union bpf_attr *kattr,
2148 union bpf_attr __user *uattr)
2153 static inline int bpf_prog_test_run_skb(struct bpf_prog *prog,
2154 const union bpf_attr *kattr,
2155 union bpf_attr __user *uattr)
2160 static inline int bpf_prog_test_run_tracing(struct bpf_prog *prog,
2161 const union bpf_attr *kattr,
2162 union bpf_attr __user *uattr)
2167 static inline int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog,
2168 const union bpf_attr *kattr,
2169 union bpf_attr __user *uattr)
2174 static inline int bpf_prog_test_run_sk_lookup(struct bpf_prog *prog,
2175 const union bpf_attr *kattr,
2176 union bpf_attr __user *uattr)
2181 static inline void bpf_map_put(struct bpf_map *map)
2185 static inline struct bpf_prog *bpf_prog_by_id(u32 id)
2187 return ERR_PTR(-ENOTSUPP);
2190 static inline const struct bpf_func_proto *
2191 bpf_base_func_proto(enum bpf_func_id func_id)
2196 static inline void bpf_task_storage_free(struct task_struct *task)
2200 static inline bool bpf_prog_has_kfunc_call(const struct bpf_prog *prog)
2205 static inline const struct btf_func_model *
2206 bpf_jit_find_kfunc_model(const struct bpf_prog *prog,
2207 const struct bpf_insn *insn)
2212 static inline bool unprivileged_ebpf_enabled(void)
2217 static inline void bpf_prog_inc_misses_counter(struct bpf_prog *prog)
2220 #endif /* CONFIG_BPF_SYSCALL */
2222 void __bpf_free_used_btfs(struct bpf_prog_aux *aux,
2223 struct btf_mod_pair *used_btfs, u32 len);
2225 static inline struct bpf_prog *bpf_prog_get_type(u32 ufd,
2226 enum bpf_prog_type type)
2228 return bpf_prog_get_type_dev(ufd, type, false);
2231 void __bpf_free_used_maps(struct bpf_prog_aux *aux,
2232 struct bpf_map **used_maps, u32 len);
2234 bool bpf_prog_get_ok(struct bpf_prog *, enum bpf_prog_type *, bool);
2236 int bpf_prog_offload_compile(struct bpf_prog *prog);
2237 void bpf_prog_offload_destroy(struct bpf_prog *prog);
2238 int bpf_prog_offload_info_fill(struct bpf_prog_info *info,
2239 struct bpf_prog *prog);
2241 int bpf_map_offload_info_fill(struct bpf_map_info *info, struct bpf_map *map);
2243 int bpf_map_offload_lookup_elem(struct bpf_map *map, void *key, void *value);
2244 int bpf_map_offload_update_elem(struct bpf_map *map,
2245 void *key, void *value, u64 flags);
2246 int bpf_map_offload_delete_elem(struct bpf_map *map, void *key);
2247 int bpf_map_offload_get_next_key(struct bpf_map *map,
2248 void *key, void *next_key);
2250 bool bpf_offload_prog_map_match(struct bpf_prog *prog, struct bpf_map *map);
2252 struct bpf_offload_dev *
2253 bpf_offload_dev_create(const struct bpf_prog_offload_ops *ops, void *priv);
2254 void bpf_offload_dev_destroy(struct bpf_offload_dev *offdev);
2255 void *bpf_offload_dev_priv(struct bpf_offload_dev *offdev);
2256 int bpf_offload_dev_netdev_register(struct bpf_offload_dev *offdev,
2257 struct net_device *netdev);
2258 void bpf_offload_dev_netdev_unregister(struct bpf_offload_dev *offdev,
2259 struct net_device *netdev);
2260 bool bpf_offload_dev_match(struct bpf_prog *prog, struct net_device *netdev);
2262 void unpriv_ebpf_notify(int new_state);
2264 #if defined(CONFIG_NET) && defined(CONFIG_BPF_SYSCALL)
2265 int bpf_prog_offload_init(struct bpf_prog *prog, union bpf_attr *attr);
2267 static inline bool bpf_prog_is_dev_bound(const struct bpf_prog_aux *aux)
2269 return aux->offload_requested;
2272 static inline bool bpf_map_is_dev_bound(struct bpf_map *map)
2274 return unlikely(map->ops == &bpf_map_offload_ops);
2277 struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr);
2278 void bpf_map_offload_map_free(struct bpf_map *map);
2279 int bpf_prog_test_run_syscall(struct bpf_prog *prog,
2280 const union bpf_attr *kattr,
2281 union bpf_attr __user *uattr);
2283 int sock_map_get_from_fd(const union bpf_attr *attr, struct bpf_prog *prog);
2284 int sock_map_prog_detach(const union bpf_attr *attr, enum bpf_prog_type ptype);
2285 int sock_map_update_elem_sys(struct bpf_map *map, void *key, void *value, u64 flags);
2286 int sock_map_bpf_prog_query(const union bpf_attr *attr,
2287 union bpf_attr __user *uattr);
2289 void sock_map_unhash(struct sock *sk);
2290 void sock_map_destroy(struct sock *sk);
2291 void sock_map_close(struct sock *sk, long timeout);
2293 static inline int bpf_prog_offload_init(struct bpf_prog *prog,
2294 union bpf_attr *attr)
2299 static inline bool bpf_prog_is_dev_bound(struct bpf_prog_aux *aux)
2304 static inline bool bpf_map_is_dev_bound(struct bpf_map *map)
2309 static inline struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr)
2311 return ERR_PTR(-EOPNOTSUPP);
2314 static inline void bpf_map_offload_map_free(struct bpf_map *map)
2318 static inline int bpf_prog_test_run_syscall(struct bpf_prog *prog,
2319 const union bpf_attr *kattr,
2320 union bpf_attr __user *uattr)
2325 #ifdef CONFIG_BPF_SYSCALL
2326 static inline int sock_map_get_from_fd(const union bpf_attr *attr,
2327 struct bpf_prog *prog)
2332 static inline int sock_map_prog_detach(const union bpf_attr *attr,
2333 enum bpf_prog_type ptype)
2338 static inline int sock_map_update_elem_sys(struct bpf_map *map, void *key, void *value,
2344 static inline int sock_map_bpf_prog_query(const union bpf_attr *attr,
2345 union bpf_attr __user *uattr)
2349 #endif /* CONFIG_BPF_SYSCALL */
2350 #endif /* CONFIG_NET && CONFIG_BPF_SYSCALL */
2352 #if defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL)
2353 void bpf_sk_reuseport_detach(struct sock *sk);
2354 int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map, void *key,
2356 int bpf_fd_reuseport_array_update_elem(struct bpf_map *map, void *key,
2357 void *value, u64 map_flags);
2359 static inline void bpf_sk_reuseport_detach(struct sock *sk)
2363 #ifdef CONFIG_BPF_SYSCALL
2364 static inline int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map,
2365 void *key, void *value)
2370 static inline int bpf_fd_reuseport_array_update_elem(struct bpf_map *map,
2371 void *key, void *value,
2376 #endif /* CONFIG_BPF_SYSCALL */
2377 #endif /* defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL) */
2379 /* verifier prototypes for helper functions called from eBPF programs */
2380 extern const struct bpf_func_proto bpf_map_lookup_elem_proto;
2381 extern const struct bpf_func_proto bpf_map_update_elem_proto;
2382 extern const struct bpf_func_proto bpf_map_delete_elem_proto;
2383 extern const struct bpf_func_proto bpf_map_push_elem_proto;
2384 extern const struct bpf_func_proto bpf_map_pop_elem_proto;
2385 extern const struct bpf_func_proto bpf_map_peek_elem_proto;
2386 extern const struct bpf_func_proto bpf_map_lookup_percpu_elem_proto;
2388 extern const struct bpf_func_proto bpf_get_prandom_u32_proto;
2389 extern const struct bpf_func_proto bpf_get_smp_processor_id_proto;
2390 extern const struct bpf_func_proto bpf_get_numa_node_id_proto;
2391 extern const struct bpf_func_proto bpf_tail_call_proto;
2392 extern const struct bpf_func_proto bpf_ktime_get_ns_proto;
2393 extern const struct bpf_func_proto bpf_ktime_get_boot_ns_proto;
2394 extern const struct bpf_func_proto bpf_get_current_pid_tgid_proto;
2395 extern const struct bpf_func_proto bpf_get_current_uid_gid_proto;
2396 extern const struct bpf_func_proto bpf_get_current_comm_proto;
2397 extern const struct bpf_func_proto bpf_get_stackid_proto;
2398 extern const struct bpf_func_proto bpf_get_stack_proto;
2399 extern const struct bpf_func_proto bpf_get_task_stack_proto;
2400 extern const struct bpf_func_proto bpf_get_stackid_proto_pe;
2401 extern const struct bpf_func_proto bpf_get_stack_proto_pe;
2402 extern const struct bpf_func_proto bpf_sock_map_update_proto;
2403 extern const struct bpf_func_proto bpf_sock_hash_update_proto;
2404 extern const struct bpf_func_proto bpf_get_current_cgroup_id_proto;
2405 extern const struct bpf_func_proto bpf_get_current_ancestor_cgroup_id_proto;
2406 extern const struct bpf_func_proto bpf_msg_redirect_hash_proto;
2407 extern const struct bpf_func_proto bpf_msg_redirect_map_proto;
2408 extern const struct bpf_func_proto bpf_sk_redirect_hash_proto;
2409 extern const struct bpf_func_proto bpf_sk_redirect_map_proto;
2410 extern const struct bpf_func_proto bpf_spin_lock_proto;
2411 extern const struct bpf_func_proto bpf_spin_unlock_proto;
2412 extern const struct bpf_func_proto bpf_get_local_storage_proto;
2413 extern const struct bpf_func_proto bpf_strtol_proto;
2414 extern const struct bpf_func_proto bpf_strtoul_proto;
2415 extern const struct bpf_func_proto bpf_tcp_sock_proto;
2416 extern const struct bpf_func_proto bpf_jiffies64_proto;
2417 extern const struct bpf_func_proto bpf_get_ns_current_pid_tgid_proto;
2418 extern const struct bpf_func_proto bpf_event_output_data_proto;
2419 extern const struct bpf_func_proto bpf_ringbuf_output_proto;
2420 extern const struct bpf_func_proto bpf_ringbuf_reserve_proto;
2421 extern const struct bpf_func_proto bpf_ringbuf_submit_proto;
2422 extern const struct bpf_func_proto bpf_ringbuf_discard_proto;
2423 extern const struct bpf_func_proto bpf_ringbuf_query_proto;
2424 extern const struct bpf_func_proto bpf_ringbuf_reserve_dynptr_proto;
2425 extern const struct bpf_func_proto bpf_ringbuf_submit_dynptr_proto;
2426 extern const struct bpf_func_proto bpf_ringbuf_discard_dynptr_proto;
2427 extern const struct bpf_func_proto bpf_skc_to_tcp6_sock_proto;
2428 extern const struct bpf_func_proto bpf_skc_to_tcp_sock_proto;
2429 extern const struct bpf_func_proto bpf_skc_to_tcp_timewait_sock_proto;
2430 extern const struct bpf_func_proto bpf_skc_to_tcp_request_sock_proto;
2431 extern const struct bpf_func_proto bpf_skc_to_udp6_sock_proto;
2432 extern const struct bpf_func_proto bpf_skc_to_unix_sock_proto;
2433 extern const struct bpf_func_proto bpf_skc_to_mptcp_sock_proto;
2434 extern const struct bpf_func_proto bpf_copy_from_user_proto;
2435 extern const struct bpf_func_proto bpf_snprintf_btf_proto;
2436 extern const struct bpf_func_proto bpf_snprintf_proto;
2437 extern const struct bpf_func_proto bpf_per_cpu_ptr_proto;
2438 extern const struct bpf_func_proto bpf_this_cpu_ptr_proto;
2439 extern const struct bpf_func_proto bpf_ktime_get_coarse_ns_proto;
2440 extern const struct bpf_func_proto bpf_sock_from_file_proto;
2441 extern const struct bpf_func_proto bpf_get_socket_ptr_cookie_proto;
2442 extern const struct bpf_func_proto bpf_task_storage_get_proto;
2443 extern const struct bpf_func_proto bpf_task_storage_delete_proto;
2444 extern const struct bpf_func_proto bpf_for_each_map_elem_proto;
2445 extern const struct bpf_func_proto bpf_btf_find_by_name_kind_proto;
2446 extern const struct bpf_func_proto bpf_sk_setsockopt_proto;
2447 extern const struct bpf_func_proto bpf_sk_getsockopt_proto;
2448 extern const struct bpf_func_proto bpf_unlocked_sk_setsockopt_proto;
2449 extern const struct bpf_func_proto bpf_unlocked_sk_getsockopt_proto;
2450 extern const struct bpf_func_proto bpf_find_vma_proto;
2451 extern const struct bpf_func_proto bpf_loop_proto;
2452 extern const struct bpf_func_proto bpf_copy_from_user_task_proto;
2453 extern const struct bpf_func_proto bpf_set_retval_proto;
2454 extern const struct bpf_func_proto bpf_get_retval_proto;
2456 const struct bpf_func_proto *tracing_prog_func_proto(
2457 enum bpf_func_id func_id, const struct bpf_prog *prog);
2459 /* Shared helpers among cBPF and eBPF. */
2460 void bpf_user_rnd_init_once(void);
2461 u64 bpf_user_rnd_u32(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
2462 u64 bpf_get_raw_cpu_id(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
2464 #if defined(CONFIG_NET)
2465 bool bpf_sock_common_is_valid_access(int off, int size,
2466 enum bpf_access_type type,
2467 struct bpf_insn_access_aux *info);
2468 bool bpf_sock_is_valid_access(int off, int size, enum bpf_access_type type,
2469 struct bpf_insn_access_aux *info);
2470 u32 bpf_sock_convert_ctx_access(enum bpf_access_type type,
2471 const struct bpf_insn *si,
2472 struct bpf_insn *insn_buf,
2473 struct bpf_prog *prog,
2476 static inline bool bpf_sock_common_is_valid_access(int off, int size,
2477 enum bpf_access_type type,
2478 struct bpf_insn_access_aux *info)
2482 static inline bool bpf_sock_is_valid_access(int off, int size,
2483 enum bpf_access_type type,
2484 struct bpf_insn_access_aux *info)
2488 static inline u32 bpf_sock_convert_ctx_access(enum bpf_access_type type,
2489 const struct bpf_insn *si,
2490 struct bpf_insn *insn_buf,
2491 struct bpf_prog *prog,
2499 struct sk_reuseport_kern {
2500 struct sk_buff *skb;
2502 struct sock *selected_sk;
2503 struct sock *migrating_sk;
2509 bool bpf_tcp_sock_is_valid_access(int off, int size, enum bpf_access_type type,
2510 struct bpf_insn_access_aux *info);
2512 u32 bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type,
2513 const struct bpf_insn *si,
2514 struct bpf_insn *insn_buf,
2515 struct bpf_prog *prog,
2518 bool bpf_xdp_sock_is_valid_access(int off, int size, enum bpf_access_type type,
2519 struct bpf_insn_access_aux *info);
2521 u32 bpf_xdp_sock_convert_ctx_access(enum bpf_access_type type,
2522 const struct bpf_insn *si,
2523 struct bpf_insn *insn_buf,
2524 struct bpf_prog *prog,
2527 static inline bool bpf_tcp_sock_is_valid_access(int off, int size,
2528 enum bpf_access_type type,
2529 struct bpf_insn_access_aux *info)
2534 static inline u32 bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type,
2535 const struct bpf_insn *si,
2536 struct bpf_insn *insn_buf,
2537 struct bpf_prog *prog,
2542 static inline bool bpf_xdp_sock_is_valid_access(int off, int size,
2543 enum bpf_access_type type,
2544 struct bpf_insn_access_aux *info)
2549 static inline u32 bpf_xdp_sock_convert_ctx_access(enum bpf_access_type type,
2550 const struct bpf_insn *si,
2551 struct bpf_insn *insn_buf,
2552 struct bpf_prog *prog,
2557 #endif /* CONFIG_INET */
2559 enum bpf_text_poke_type {
2564 int bpf_arch_text_poke(void *ip, enum bpf_text_poke_type t,
2565 void *addr1, void *addr2);
2567 void *bpf_arch_text_copy(void *dst, void *src, size_t len);
2568 int bpf_arch_text_invalidate(void *dst, size_t len);
2571 bool btf_id_set_contains(const struct btf_id_set *set, u32 id);
2573 #define MAX_BPRINTF_VARARGS 12
2575 int bpf_bprintf_prepare(char *fmt, u32 fmt_size, const u64 *raw_args,
2576 u32 **bin_buf, u32 num_args);
2577 void bpf_bprintf_cleanup(void);
2579 /* the implementation of the opaque uapi struct bpf_dynptr */
2580 struct bpf_dynptr_kern {
2582 /* Size represents the number of usable bytes of dynptr data.
2583 * If for example the offset is at 4 for a local dynptr whose data is
2584 * of type u64, the number of usable bytes is 4.
2586 * The upper 8 bits are reserved. It is as follows:
2587 * Bits 0 - 23 = size
2588 * Bits 24 - 30 = dynptr type
2589 * Bit 31 = whether dynptr is read-only
2595 enum bpf_dynptr_type {
2596 BPF_DYNPTR_TYPE_INVALID,
2597 /* Points to memory that is local to the bpf program */
2598 BPF_DYNPTR_TYPE_LOCAL,
2599 /* Underlying data is a ringbuf record */
2600 BPF_DYNPTR_TYPE_RINGBUF,
2603 void bpf_dynptr_init(struct bpf_dynptr_kern *ptr, void *data,
2604 enum bpf_dynptr_type type, u32 offset, u32 size);
2605 void bpf_dynptr_set_null(struct bpf_dynptr_kern *ptr);
2606 int bpf_dynptr_check_size(u32 size);
2608 #ifdef CONFIG_BPF_LSM
2609 void bpf_cgroup_atype_get(u32 attach_btf_id, int cgroup_atype);
2610 void bpf_cgroup_atype_put(int cgroup_atype);
2612 static inline void bpf_cgroup_atype_get(u32 attach_btf_id, int cgroup_atype) {}
2613 static inline void bpf_cgroup_atype_put(int cgroup_atype) {}
2614 #endif /* CONFIG_BPF_LSM */
2616 #endif /* _LINUX_BPF_H */