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 u64 (*bpf_callback_t)(u64, u64, u64, u64, u64);
52 typedef int (*bpf_iter_init_seq_priv_t)(void *private_data,
53 struct bpf_iter_aux_info *aux);
54 typedef void (*bpf_iter_fini_seq_priv_t)(void *private_data);
55 struct bpf_iter_seq_info {
56 const struct seq_operations *seq_ops;
57 bpf_iter_init_seq_priv_t init_seq_private;
58 bpf_iter_fini_seq_priv_t fini_seq_private;
62 /* map is generic key/value storage optionally accessible by eBPF programs */
64 /* funcs callable from userspace (via syscall) */
65 int (*map_alloc_check)(union bpf_attr *attr);
66 struct bpf_map *(*map_alloc)(union bpf_attr *attr);
67 void (*map_release)(struct bpf_map *map, struct file *map_file);
68 void (*map_free)(struct bpf_map *map);
69 int (*map_get_next_key)(struct bpf_map *map, void *key, void *next_key);
70 void (*map_release_uref)(struct bpf_map *map);
71 void *(*map_lookup_elem_sys_only)(struct bpf_map *map, void *key);
72 int (*map_lookup_batch)(struct bpf_map *map, const union bpf_attr *attr,
73 union bpf_attr __user *uattr);
74 int (*map_lookup_and_delete_elem)(struct bpf_map *map, void *key,
75 void *value, u64 flags);
76 int (*map_lookup_and_delete_batch)(struct bpf_map *map,
77 const union bpf_attr *attr,
78 union bpf_attr __user *uattr);
79 int (*map_update_batch)(struct bpf_map *map, const union bpf_attr *attr,
80 union bpf_attr __user *uattr);
81 int (*map_delete_batch)(struct bpf_map *map, const union bpf_attr *attr,
82 union bpf_attr __user *uattr);
84 /* funcs callable from userspace and from eBPF programs */
85 void *(*map_lookup_elem)(struct bpf_map *map, void *key);
86 int (*map_update_elem)(struct bpf_map *map, void *key, void *value, u64 flags);
87 int (*map_delete_elem)(struct bpf_map *map, void *key);
88 int (*map_push_elem)(struct bpf_map *map, void *value, u64 flags);
89 int (*map_pop_elem)(struct bpf_map *map, void *value);
90 int (*map_peek_elem)(struct bpf_map *map, void *value);
92 /* funcs called by prog_array and perf_event_array map */
93 void *(*map_fd_get_ptr)(struct bpf_map *map, struct file *map_file,
95 void (*map_fd_put_ptr)(void *ptr);
96 int (*map_gen_lookup)(struct bpf_map *map, struct bpf_insn *insn_buf);
97 u32 (*map_fd_sys_lookup_elem)(void *ptr);
98 void (*map_seq_show_elem)(struct bpf_map *map, void *key,
100 int (*map_check_btf)(const struct bpf_map *map,
101 const struct btf *btf,
102 const struct btf_type *key_type,
103 const struct btf_type *value_type);
105 /* Prog poke tracking helpers. */
106 int (*map_poke_track)(struct bpf_map *map, struct bpf_prog_aux *aux);
107 void (*map_poke_untrack)(struct bpf_map *map, struct bpf_prog_aux *aux);
108 void (*map_poke_run)(struct bpf_map *map, u32 key, struct bpf_prog *old,
109 struct bpf_prog *new);
111 /* Direct value access helpers. */
112 int (*map_direct_value_addr)(const struct bpf_map *map,
114 int (*map_direct_value_meta)(const struct bpf_map *map,
116 int (*map_mmap)(struct bpf_map *map, struct vm_area_struct *vma);
117 __poll_t (*map_poll)(struct bpf_map *map, struct file *filp,
118 struct poll_table_struct *pts);
120 /* Functions called by bpf_local_storage maps */
121 int (*map_local_storage_charge)(struct bpf_local_storage_map *smap,
122 void *owner, u32 size);
123 void (*map_local_storage_uncharge)(struct bpf_local_storage_map *smap,
124 void *owner, u32 size);
125 struct bpf_local_storage __rcu ** (*map_owner_storage_ptr)(void *owner);
128 int (*map_redirect)(struct bpf_map *map, u32 ifindex, u64 flags);
130 /* map_meta_equal must be implemented for maps that can be
131 * used as an inner map. It is a runtime check to ensure
132 * an inner map can be inserted to an outer map.
134 * Some properties of the inner map has been used during the
135 * verification time. When inserting an inner map at the runtime,
136 * map_meta_equal has to ensure the inserting map has the same
137 * properties that the verifier has used earlier.
139 bool (*map_meta_equal)(const struct bpf_map *meta0,
140 const struct bpf_map *meta1);
143 int (*map_set_for_each_callback_args)(struct bpf_verifier_env *env,
144 struct bpf_func_state *caller,
145 struct bpf_func_state *callee);
146 int (*map_for_each_callback)(struct bpf_map *map,
147 bpf_callback_t callback_fn,
148 void *callback_ctx, u64 flags);
150 /* BTF name and id of struct allocated by map_alloc */
151 const char * const map_btf_name;
154 /* bpf_iter info used to open a seq_file */
155 const struct bpf_iter_seq_info *iter_seq_info;
159 /* The first two cachelines with read-mostly members of which some
160 * are also accessed in fast-path (e.g. ops, max_entries).
162 const struct bpf_map_ops *ops ____cacheline_aligned;
163 struct bpf_map *inner_map_meta;
164 #ifdef CONFIG_SECURITY
167 enum bpf_map_type map_type;
171 u64 map_extra; /* any per-map-type extra fields */
173 int spin_lock_off; /* >=0 valid offset, <0 error */
174 int timer_off; /* >=0 valid offset, <0 error */
178 u32 btf_value_type_id;
179 u32 btf_vmlinux_value_type_id;
181 #ifdef CONFIG_MEMCG_KMEM
182 struct mem_cgroup *memcg;
184 char name[BPF_OBJ_NAME_LEN];
186 bool frozen; /* write-once; write-protected by freeze_mutex */
189 /* The 3rd and 4th cacheline with misc members to avoid false sharing
190 * particularly with refcounting.
192 atomic64_t refcnt ____cacheline_aligned;
194 struct work_struct work;
195 struct mutex freeze_mutex;
199 static inline bool map_value_has_spin_lock(const struct bpf_map *map)
201 return map->spin_lock_off >= 0;
204 static inline bool map_value_has_timer(const struct bpf_map *map)
206 return map->timer_off >= 0;
209 static inline void check_and_init_map_value(struct bpf_map *map, void *dst)
211 if (unlikely(map_value_has_spin_lock(map)))
212 memset(dst + map->spin_lock_off, 0, sizeof(struct bpf_spin_lock));
213 if (unlikely(map_value_has_timer(map)))
214 memset(dst + map->timer_off, 0, sizeof(struct bpf_timer));
217 /* copy everything but bpf_spin_lock and bpf_timer. There could be one of each. */
218 static inline void copy_map_value(struct bpf_map *map, void *dst, void *src)
220 u32 s_off = 0, s_sz = 0, t_off = 0, t_sz = 0;
222 if (unlikely(map_value_has_spin_lock(map))) {
223 s_off = map->spin_lock_off;
224 s_sz = sizeof(struct bpf_spin_lock);
226 if (unlikely(map_value_has_timer(map))) {
227 t_off = map->timer_off;
228 t_sz = sizeof(struct bpf_timer);
231 if (unlikely(s_sz || t_sz)) {
232 if (s_off < t_off || !s_sz) {
236 memcpy(dst, src, t_off);
237 memcpy(dst + t_off + t_sz,
239 s_off - t_off - t_sz);
240 memcpy(dst + s_off + s_sz,
242 map->value_size - s_off - s_sz);
244 memcpy(dst, src, map->value_size);
247 void copy_map_value_locked(struct bpf_map *map, void *dst, void *src,
249 void bpf_timer_cancel_and_free(void *timer);
250 int bpf_obj_name_cpy(char *dst, const char *src, unsigned int size);
252 struct bpf_offload_dev;
253 struct bpf_offloaded_map;
255 struct bpf_map_dev_ops {
256 int (*map_get_next_key)(struct bpf_offloaded_map *map,
257 void *key, void *next_key);
258 int (*map_lookup_elem)(struct bpf_offloaded_map *map,
259 void *key, void *value);
260 int (*map_update_elem)(struct bpf_offloaded_map *map,
261 void *key, void *value, u64 flags);
262 int (*map_delete_elem)(struct bpf_offloaded_map *map, void *key);
265 struct bpf_offloaded_map {
267 struct net_device *netdev;
268 const struct bpf_map_dev_ops *dev_ops;
270 struct list_head offloads;
273 static inline struct bpf_offloaded_map *map_to_offmap(struct bpf_map *map)
275 return container_of(map, struct bpf_offloaded_map, map);
278 static inline bool bpf_map_offload_neutral(const struct bpf_map *map)
280 return map->map_type == BPF_MAP_TYPE_PERF_EVENT_ARRAY;
283 static inline bool bpf_map_support_seq_show(const struct bpf_map *map)
285 return (map->btf_value_type_id || map->btf_vmlinux_value_type_id) &&
286 map->ops->map_seq_show_elem;
289 int map_check_no_btf(const struct bpf_map *map,
290 const struct btf *btf,
291 const struct btf_type *key_type,
292 const struct btf_type *value_type);
294 bool bpf_map_meta_equal(const struct bpf_map *meta0,
295 const struct bpf_map *meta1);
297 extern const struct bpf_map_ops bpf_map_offload_ops;
299 /* bpf_type_flag contains a set of flags that are applicable to the values of
300 * arg_type, ret_type and reg_type. For example, a pointer value may be null,
301 * or a memory is read-only. We classify types into two categories: base types
302 * and extended types. Extended types are base types combined with a type flag.
304 * Currently there are no more than 32 base types in arg_type, ret_type and
307 #define BPF_BASE_TYPE_BITS 8
310 /* PTR may be NULL. */
311 PTR_MAYBE_NULL = BIT(0 + BPF_BASE_TYPE_BITS),
313 /* MEM is read-only. When applied on bpf_arg, it indicates the arg is
314 * compatible with both mutable and immutable memory.
316 MEM_RDONLY = BIT(1 + BPF_BASE_TYPE_BITS),
318 /* MEM was "allocated" from a different helper, and cannot be mixed
319 * with regular non-MEM_ALLOC'ed MEM types.
321 MEM_ALLOC = BIT(2 + BPF_BASE_TYPE_BITS),
323 __BPF_TYPE_LAST_FLAG = MEM_ALLOC,
326 /* Max number of base types. */
327 #define BPF_BASE_TYPE_LIMIT (1UL << BPF_BASE_TYPE_BITS)
329 /* Max number of all types. */
330 #define BPF_TYPE_LIMIT (__BPF_TYPE_LAST_FLAG | (__BPF_TYPE_LAST_FLAG - 1))
332 /* function argument constraints */
334 ARG_DONTCARE = 0, /* unused argument in helper function */
336 /* the following constraints used to prototype
337 * bpf_map_lookup/update/delete_elem() functions
339 ARG_CONST_MAP_PTR, /* const argument used as pointer to bpf_map */
340 ARG_PTR_TO_MAP_KEY, /* pointer to stack used as map key */
341 ARG_PTR_TO_MAP_VALUE, /* pointer to stack used as map value */
342 ARG_PTR_TO_UNINIT_MAP_VALUE, /* pointer to valid memory used to store a map value */
344 /* the following constraints used to prototype bpf_memcmp() and other
345 * functions that access data on eBPF program stack
347 ARG_PTR_TO_MEM, /* pointer to valid memory (stack, packet, map value) */
348 ARG_PTR_TO_UNINIT_MEM, /* pointer to memory does not need to be initialized,
349 * helper function must fill all bytes or clear
350 * them in error case.
353 ARG_CONST_SIZE, /* number of bytes accessed from memory */
354 ARG_CONST_SIZE_OR_ZERO, /* number of bytes accessed from memory or 0 */
356 ARG_PTR_TO_CTX, /* pointer to context */
357 ARG_ANYTHING, /* any (initialized) argument is ok */
358 ARG_PTR_TO_SPIN_LOCK, /* pointer to bpf_spin_lock */
359 ARG_PTR_TO_SOCK_COMMON, /* pointer to sock_common */
360 ARG_PTR_TO_INT, /* pointer to int */
361 ARG_PTR_TO_LONG, /* pointer to long */
362 ARG_PTR_TO_SOCKET, /* pointer to bpf_sock (fullsock) */
363 ARG_PTR_TO_BTF_ID, /* pointer to in-kernel struct */
364 ARG_PTR_TO_ALLOC_MEM, /* pointer to dynamically allocated memory */
365 ARG_CONST_ALLOC_SIZE_OR_ZERO, /* number of allocated bytes requested */
366 ARG_PTR_TO_BTF_ID_SOCK_COMMON, /* pointer to in-kernel sock_common or bpf-mirrored bpf_sock */
367 ARG_PTR_TO_PERCPU_BTF_ID, /* pointer to in-kernel percpu type */
368 ARG_PTR_TO_FUNC, /* pointer to a bpf program function */
369 ARG_PTR_TO_STACK, /* pointer to stack */
370 ARG_PTR_TO_CONST_STR, /* pointer to a null terminated read-only string */
371 ARG_PTR_TO_TIMER, /* pointer to bpf_timer */
374 /* Extended arg_types. */
375 ARG_PTR_TO_MAP_VALUE_OR_NULL = PTR_MAYBE_NULL | ARG_PTR_TO_MAP_VALUE,
376 ARG_PTR_TO_MEM_OR_NULL = PTR_MAYBE_NULL | ARG_PTR_TO_MEM,
377 ARG_PTR_TO_CTX_OR_NULL = PTR_MAYBE_NULL | ARG_PTR_TO_CTX,
378 ARG_PTR_TO_SOCKET_OR_NULL = PTR_MAYBE_NULL | ARG_PTR_TO_SOCKET,
379 ARG_PTR_TO_ALLOC_MEM_OR_NULL = PTR_MAYBE_NULL | ARG_PTR_TO_ALLOC_MEM,
380 ARG_PTR_TO_STACK_OR_NULL = PTR_MAYBE_NULL | ARG_PTR_TO_STACK,
382 /* This must be the last entry. Its purpose is to ensure the enum is
383 * wide enough to hold the higher bits reserved for bpf_type_flag.
385 __BPF_ARG_TYPE_LIMIT = BPF_TYPE_LIMIT,
387 static_assert(__BPF_ARG_TYPE_MAX <= BPF_BASE_TYPE_LIMIT);
389 /* type of values returned from helper functions */
390 enum bpf_return_type {
391 RET_INTEGER, /* function returns integer */
392 RET_VOID, /* function doesn't return anything */
393 RET_PTR_TO_MAP_VALUE, /* returns a pointer to map elem value */
394 RET_PTR_TO_SOCKET, /* returns a pointer to a socket */
395 RET_PTR_TO_TCP_SOCK, /* returns a pointer to a tcp_sock */
396 RET_PTR_TO_SOCK_COMMON, /* returns a pointer to a sock_common */
397 RET_PTR_TO_ALLOC_MEM, /* returns a pointer to dynamically allocated memory */
398 RET_PTR_TO_MEM_OR_BTF_ID, /* returns a pointer to a valid memory or a btf_id */
399 RET_PTR_TO_BTF_ID, /* returns a pointer to a btf_id */
402 /* Extended ret_types. */
403 RET_PTR_TO_MAP_VALUE_OR_NULL = PTR_MAYBE_NULL | RET_PTR_TO_MAP_VALUE,
404 RET_PTR_TO_SOCKET_OR_NULL = PTR_MAYBE_NULL | RET_PTR_TO_SOCKET,
405 RET_PTR_TO_TCP_SOCK_OR_NULL = PTR_MAYBE_NULL | RET_PTR_TO_TCP_SOCK,
406 RET_PTR_TO_SOCK_COMMON_OR_NULL = PTR_MAYBE_NULL | RET_PTR_TO_SOCK_COMMON,
407 RET_PTR_TO_ALLOC_MEM_OR_NULL = PTR_MAYBE_NULL | MEM_ALLOC | RET_PTR_TO_ALLOC_MEM,
408 RET_PTR_TO_BTF_ID_OR_NULL = PTR_MAYBE_NULL | RET_PTR_TO_BTF_ID,
410 /* This must be the last entry. Its purpose is to ensure the enum is
411 * wide enough to hold the higher bits reserved for bpf_type_flag.
413 __BPF_RET_TYPE_LIMIT = BPF_TYPE_LIMIT,
415 static_assert(__BPF_RET_TYPE_MAX <= BPF_BASE_TYPE_LIMIT);
417 /* eBPF function prototype used by verifier to allow BPF_CALLs from eBPF programs
418 * to in-kernel helper functions and for adjusting imm32 field in BPF_CALL
419 * instructions after verifying
421 struct bpf_func_proto {
422 u64 (*func)(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
425 enum bpf_return_type ret_type;
428 enum bpf_arg_type arg1_type;
429 enum bpf_arg_type arg2_type;
430 enum bpf_arg_type arg3_type;
431 enum bpf_arg_type arg4_type;
432 enum bpf_arg_type arg5_type;
434 enum bpf_arg_type arg_type[5];
446 int *ret_btf_id; /* return value btf_id */
447 bool (*allowed)(const struct bpf_prog *prog);
450 /* bpf_context is intentionally undefined structure. Pointer to bpf_context is
451 * the first argument to eBPF programs.
452 * For socket filters: 'struct bpf_context *' == 'struct sk_buff *'
456 enum bpf_access_type {
461 /* types of values stored in eBPF registers */
462 /* Pointer types represent:
465 * pointer + (u16) var
466 * pointer + (u16) var + imm
467 * if (range > 0) then [ptr, ptr + range - off) is safe to access
468 * if (id > 0) means that some 'var' was added
469 * if (off > 0) means that 'imm' was added
472 NOT_INIT = 0, /* nothing was written into register */
473 SCALAR_VALUE, /* reg doesn't contain a valid pointer */
474 PTR_TO_CTX, /* reg points to bpf_context */
475 CONST_PTR_TO_MAP, /* reg points to struct bpf_map */
476 PTR_TO_MAP_VALUE, /* reg points to map element value */
477 PTR_TO_MAP_KEY, /* reg points to a map element key */
478 PTR_TO_STACK, /* reg == frame_pointer + offset */
479 PTR_TO_PACKET_META, /* skb->data - meta_len */
480 PTR_TO_PACKET, /* reg points to skb->data */
481 PTR_TO_PACKET_END, /* skb->data + headlen */
482 PTR_TO_FLOW_KEYS, /* reg points to bpf_flow_keys */
483 PTR_TO_SOCKET, /* reg points to struct bpf_sock */
484 PTR_TO_SOCK_COMMON, /* reg points to sock_common */
485 PTR_TO_TCP_SOCK, /* reg points to struct tcp_sock */
486 PTR_TO_TP_BUFFER, /* reg points to a writable raw tp's buffer */
487 PTR_TO_XDP_SOCK, /* reg points to struct xdp_sock */
488 /* PTR_TO_BTF_ID points to a kernel struct that does not need
489 * to be null checked by the BPF program. This does not imply the
490 * pointer is _not_ null and in practice this can easily be a null
491 * pointer when reading pointer chains. The assumption is program
492 * context will handle null pointer dereference typically via fault
493 * handling. The verifier must keep this in mind and can make no
494 * assumptions about null or non-null when doing branch analysis.
495 * Further, when passed into helpers the helpers can not, without
496 * additional context, assume the value is non-null.
499 /* PTR_TO_BTF_ID_OR_NULL points to a kernel struct that has not
500 * been checked for null. Used primarily to inform the verifier
501 * an explicit null check is required for this struct.
503 PTR_TO_MEM, /* reg points to valid memory region */
504 PTR_TO_BUF, /* reg points to a read/write buffer */
505 PTR_TO_PERCPU_BTF_ID, /* reg points to a percpu kernel variable */
506 PTR_TO_FUNC, /* reg points to a bpf program function */
509 /* Extended reg_types. */
510 PTR_TO_MAP_VALUE_OR_NULL = PTR_MAYBE_NULL | PTR_TO_MAP_VALUE,
511 PTR_TO_SOCKET_OR_NULL = PTR_MAYBE_NULL | PTR_TO_SOCKET,
512 PTR_TO_SOCK_COMMON_OR_NULL = PTR_MAYBE_NULL | PTR_TO_SOCK_COMMON,
513 PTR_TO_TCP_SOCK_OR_NULL = PTR_MAYBE_NULL | PTR_TO_TCP_SOCK,
514 PTR_TO_BTF_ID_OR_NULL = PTR_MAYBE_NULL | PTR_TO_BTF_ID,
516 /* This must be the last entry. Its purpose is to ensure the enum is
517 * wide enough to hold the higher bits reserved for bpf_type_flag.
519 __BPF_REG_TYPE_LIMIT = BPF_TYPE_LIMIT,
521 static_assert(__BPF_REG_TYPE_MAX <= BPF_BASE_TYPE_LIMIT);
523 /* The information passed from prog-specific *_is_valid_access
524 * back to the verifier.
526 struct bpf_insn_access_aux {
527 enum bpf_reg_type reg_type;
535 struct bpf_verifier_log *log; /* for verbose logs */
539 bpf_ctx_record_field_size(struct bpf_insn_access_aux *aux, u32 size)
541 aux->ctx_field_size = size;
544 static inline bool bpf_pseudo_func(const struct bpf_insn *insn)
546 return insn->code == (BPF_LD | BPF_IMM | BPF_DW) &&
547 insn->src_reg == BPF_PSEUDO_FUNC;
550 struct bpf_prog_ops {
551 int (*test_run)(struct bpf_prog *prog, const union bpf_attr *kattr,
552 union bpf_attr __user *uattr);
555 struct bpf_verifier_ops {
556 /* return eBPF function prototype for verification */
557 const struct bpf_func_proto *
558 (*get_func_proto)(enum bpf_func_id func_id,
559 const struct bpf_prog *prog);
561 /* return true if 'size' wide access at offset 'off' within bpf_context
562 * with 'type' (read or write) is allowed
564 bool (*is_valid_access)(int off, int size, enum bpf_access_type type,
565 const struct bpf_prog *prog,
566 struct bpf_insn_access_aux *info);
567 int (*gen_prologue)(struct bpf_insn *insn, bool direct_write,
568 const struct bpf_prog *prog);
569 int (*gen_ld_abs)(const struct bpf_insn *orig,
570 struct bpf_insn *insn_buf);
571 u32 (*convert_ctx_access)(enum bpf_access_type type,
572 const struct bpf_insn *src,
573 struct bpf_insn *dst,
574 struct bpf_prog *prog, u32 *target_size);
575 int (*btf_struct_access)(struct bpf_verifier_log *log,
576 const struct btf *btf,
577 const struct btf_type *t, int off, int size,
578 enum bpf_access_type atype,
580 bool (*check_kfunc_call)(u32 kfunc_btf_id, struct module *owner);
583 struct bpf_prog_offload_ops {
584 /* verifier basic callbacks */
585 int (*insn_hook)(struct bpf_verifier_env *env,
586 int insn_idx, int prev_insn_idx);
587 int (*finalize)(struct bpf_verifier_env *env);
588 /* verifier optimization callbacks (called after .finalize) */
589 int (*replace_insn)(struct bpf_verifier_env *env, u32 off,
590 struct bpf_insn *insn);
591 int (*remove_insns)(struct bpf_verifier_env *env, u32 off, u32 cnt);
592 /* program management callbacks */
593 int (*prepare)(struct bpf_prog *prog);
594 int (*translate)(struct bpf_prog *prog);
595 void (*destroy)(struct bpf_prog *prog);
598 struct bpf_prog_offload {
599 struct bpf_prog *prog;
600 struct net_device *netdev;
601 struct bpf_offload_dev *offdev;
603 struct list_head offloads;
610 enum bpf_cgroup_storage_type {
611 BPF_CGROUP_STORAGE_SHARED,
612 BPF_CGROUP_STORAGE_PERCPU,
613 __BPF_CGROUP_STORAGE_MAX
616 #define MAX_BPF_CGROUP_STORAGE_TYPE __BPF_CGROUP_STORAGE_MAX
618 /* The longest tracepoint has 12 args.
619 * See include/trace/bpf_probe.h
621 #define MAX_BPF_FUNC_ARGS 12
623 /* The maximum number of arguments passed through registers
624 * a single function may have.
626 #define MAX_BPF_FUNC_REG_ARGS 5
628 struct btf_func_model {
631 u8 arg_size[MAX_BPF_FUNC_ARGS];
634 /* Restore arguments before returning from trampoline to let original function
635 * continue executing. This flag is used for fentry progs when there are no
638 #define BPF_TRAMP_F_RESTORE_REGS BIT(0)
639 /* Call original function after fentry progs, but before fexit progs.
640 * Makes sense for fentry/fexit, normal calls and indirect calls.
642 #define BPF_TRAMP_F_CALL_ORIG BIT(1)
643 /* Skip current frame and return to parent. Makes sense for fentry/fexit
644 * programs only. Should not be used with normal calls and indirect calls.
646 #define BPF_TRAMP_F_SKIP_FRAME BIT(2)
647 /* Store IP address of the caller on the trampoline stack,
648 * so it's available for trampoline's programs.
650 #define BPF_TRAMP_F_IP_ARG BIT(3)
651 /* Return the return value of fentry prog. Only used by bpf_struct_ops. */
652 #define BPF_TRAMP_F_RET_FENTRY_RET BIT(4)
654 /* Each call __bpf_prog_enter + call bpf_func + call __bpf_prog_exit is ~50
655 * bytes on x86. Pick a number to fit into BPF_IMAGE_SIZE / 2
657 #define BPF_MAX_TRAMP_PROGS 38
659 struct bpf_tramp_progs {
660 struct bpf_prog *progs[BPF_MAX_TRAMP_PROGS];
664 /* Different use cases for BPF trampoline:
665 * 1. replace nop at the function entry (kprobe equivalent)
666 * flags = BPF_TRAMP_F_RESTORE_REGS
667 * fentry = a set of programs to run before returning from trampoline
669 * 2. replace nop at the function entry (kprobe + kretprobe equivalent)
670 * flags = BPF_TRAMP_F_CALL_ORIG | BPF_TRAMP_F_SKIP_FRAME
671 * orig_call = fentry_ip + MCOUNT_INSN_SIZE
672 * fentry = a set of program to run before calling original function
673 * fexit = a set of program to run after original function
675 * 3. replace direct call instruction anywhere in the function body
676 * or assign a function pointer for indirect call (like tcp_congestion_ops->cong_avoid)
678 * fentry = a set of programs to run before returning from trampoline
679 * With flags = BPF_TRAMP_F_CALL_ORIG
680 * orig_call = original callback addr or direct function addr
681 * fentry = a set of program to run before calling original function
682 * fexit = a set of program to run after original function
684 struct bpf_tramp_image;
685 int arch_prepare_bpf_trampoline(struct bpf_tramp_image *tr, void *image, void *image_end,
686 const struct btf_func_model *m, u32 flags,
687 struct bpf_tramp_progs *tprogs,
689 /* these two functions are called from generated trampoline */
690 u64 notrace __bpf_prog_enter(struct bpf_prog *prog);
691 void notrace __bpf_prog_exit(struct bpf_prog *prog, u64 start);
692 u64 notrace __bpf_prog_enter_sleepable(struct bpf_prog *prog);
693 void notrace __bpf_prog_exit_sleepable(struct bpf_prog *prog, u64 start);
694 void notrace __bpf_tramp_enter(struct bpf_tramp_image *tr);
695 void notrace __bpf_tramp_exit(struct bpf_tramp_image *tr);
700 char name[KSYM_NAME_LEN];
701 struct list_head lnode;
702 struct latch_tree_node tnode;
706 enum bpf_tramp_prog_type {
709 BPF_TRAMP_MODIFY_RETURN,
711 BPF_TRAMP_REPLACE, /* more than MAX */
714 struct bpf_tramp_image {
716 struct bpf_ksym ksym;
717 struct percpu_ref pcref;
722 struct work_struct work;
726 struct bpf_trampoline {
727 /* hlist for trampoline_table */
728 struct hlist_node hlist;
729 /* serializes access to fields of this trampoline */
734 struct btf_func_model model;
738 /* if !NULL this is BPF_PROG_TYPE_EXT program that extends another BPF
739 * program by replacing one of its functions. func.addr is the address
740 * of the function it replaced.
742 struct bpf_prog *extension_prog;
743 /* list of BPF programs using this trampoline */
744 struct hlist_head progs_hlist[BPF_TRAMP_MAX];
745 /* Number of attached programs. A counter per kind. */
746 int progs_cnt[BPF_TRAMP_MAX];
747 /* Executable image of trampoline */
748 struct bpf_tramp_image *cur_image;
753 struct bpf_attach_target_info {
754 struct btf_func_model fmodel;
756 const char *tgt_name;
757 const struct btf_type *tgt_type;
760 #define BPF_DISPATCHER_MAX 48 /* Fits in 2048B */
762 struct bpf_dispatcher_prog {
763 struct bpf_prog *prog;
767 struct bpf_dispatcher {
768 /* dispatcher mutex */
771 struct bpf_dispatcher_prog progs[BPF_DISPATCHER_MAX];
775 struct bpf_ksym ksym;
778 static __always_inline __nocfi unsigned int bpf_dispatcher_nop_func(
780 const struct bpf_insn *insnsi,
781 unsigned int (*bpf_func)(const void *,
782 const struct bpf_insn *))
784 return bpf_func(ctx, insnsi);
786 #ifdef CONFIG_BPF_JIT
787 int bpf_trampoline_link_prog(struct bpf_prog *prog, struct bpf_trampoline *tr);
788 int bpf_trampoline_unlink_prog(struct bpf_prog *prog, struct bpf_trampoline *tr);
789 struct bpf_trampoline *bpf_trampoline_get(u64 key,
790 struct bpf_attach_target_info *tgt_info);
791 void bpf_trampoline_put(struct bpf_trampoline *tr);
792 int arch_prepare_bpf_dispatcher(void *image, s64 *funcs, int num_funcs);
793 #define BPF_DISPATCHER_INIT(_name) { \
794 .mutex = __MUTEX_INITIALIZER(_name.mutex), \
795 .func = &_name##_func, \
802 .lnode = LIST_HEAD_INIT(_name.ksym.lnode), \
806 #define DEFINE_BPF_DISPATCHER(name) \
807 noinline __nocfi unsigned int bpf_dispatcher_##name##_func( \
809 const struct bpf_insn *insnsi, \
810 unsigned int (*bpf_func)(const void *, \
811 const struct bpf_insn *)) \
813 return bpf_func(ctx, insnsi); \
815 EXPORT_SYMBOL(bpf_dispatcher_##name##_func); \
816 struct bpf_dispatcher bpf_dispatcher_##name = \
817 BPF_DISPATCHER_INIT(bpf_dispatcher_##name);
818 #define DECLARE_BPF_DISPATCHER(name) \
819 unsigned int bpf_dispatcher_##name##_func( \
821 const struct bpf_insn *insnsi, \
822 unsigned int (*bpf_func)(const void *, \
823 const struct bpf_insn *)); \
824 extern struct bpf_dispatcher bpf_dispatcher_##name;
825 #define BPF_DISPATCHER_FUNC(name) bpf_dispatcher_##name##_func
826 #define BPF_DISPATCHER_PTR(name) (&bpf_dispatcher_##name)
827 void bpf_dispatcher_change_prog(struct bpf_dispatcher *d, struct bpf_prog *from,
828 struct bpf_prog *to);
829 /* Called only from JIT-enabled code, so there's no need for stubs. */
830 void *bpf_jit_alloc_exec_page(void);
831 void bpf_image_ksym_add(void *data, struct bpf_ksym *ksym);
832 void bpf_image_ksym_del(struct bpf_ksym *ksym);
833 void bpf_ksym_add(struct bpf_ksym *ksym);
834 void bpf_ksym_del(struct bpf_ksym *ksym);
835 int bpf_jit_charge_modmem(u32 pages);
836 void bpf_jit_uncharge_modmem(u32 pages);
837 bool bpf_prog_has_trampoline(const struct bpf_prog *prog);
839 static inline int bpf_trampoline_link_prog(struct bpf_prog *prog,
840 struct bpf_trampoline *tr)
844 static inline int bpf_trampoline_unlink_prog(struct bpf_prog *prog,
845 struct bpf_trampoline *tr)
849 static inline struct bpf_trampoline *bpf_trampoline_get(u64 key,
850 struct bpf_attach_target_info *tgt_info)
852 return ERR_PTR(-EOPNOTSUPP);
854 static inline void bpf_trampoline_put(struct bpf_trampoline *tr) {}
855 #define DEFINE_BPF_DISPATCHER(name)
856 #define DECLARE_BPF_DISPATCHER(name)
857 #define BPF_DISPATCHER_FUNC(name) bpf_dispatcher_nop_func
858 #define BPF_DISPATCHER_PTR(name) NULL
859 static inline void bpf_dispatcher_change_prog(struct bpf_dispatcher *d,
860 struct bpf_prog *from,
861 struct bpf_prog *to) {}
862 static inline bool is_bpf_image_address(unsigned long address)
866 static inline bool bpf_prog_has_trampoline(const struct bpf_prog *prog)
872 struct bpf_func_info_aux {
877 enum bpf_jit_poke_reason {
878 BPF_POKE_REASON_TAIL_CALL,
881 /* Descriptor of pokes pointing /into/ the JITed image. */
882 struct bpf_jit_poke_descriptor {
883 void *tailcall_target;
884 void *tailcall_bypass;
893 bool tailcall_target_stable;
899 /* reg_type info for ctx arguments */
900 struct bpf_ctx_arg_aux {
902 enum bpf_reg_type reg_type;
906 struct btf_mod_pair {
908 struct module *module;
911 struct bpf_kfunc_desc_tab;
913 struct bpf_prog_aux {
922 u32 func_cnt; /* used by non-func prog as the number of func progs */
923 u32 func_idx; /* 0 for non-func prog, the index in func array for func prog */
924 u32 attach_btf_id; /* in-kernel BTF type id to attach to */
925 u32 ctx_arg_info_size;
926 u32 max_rdonly_access;
928 struct btf *attach_btf;
929 const struct bpf_ctx_arg_aux *ctx_arg_info;
930 struct mutex dst_mutex; /* protects dst_* pointers below, *after* prog becomes visible */
931 struct bpf_prog *dst_prog;
932 struct bpf_trampoline *dst_trampoline;
933 enum bpf_prog_type saved_dst_prog_type;
934 enum bpf_attach_type saved_dst_attach_type;
935 bool verifier_zext; /* Zero extensions has been inserted by verifier. */
936 bool offload_requested;
937 bool attach_btf_trace; /* true if attaching to BTF-enabled raw tp */
938 bool func_proto_unreliable;
940 bool tail_call_reachable;
941 struct hlist_node tramp_hlist;
942 /* BTF_KIND_FUNC_PROTO for valid attach_btf_id */
943 const struct btf_type *attach_func_proto;
944 /* function name for valid attach_btf_id */
945 const char *attach_func_name;
946 struct bpf_prog **func;
947 void *jit_data; /* JIT specific data. arch dependent */
948 struct bpf_jit_poke_descriptor *poke_tab;
949 struct bpf_kfunc_desc_tab *kfunc_tab;
950 struct bpf_kfunc_btf_tab *kfunc_btf_tab;
952 struct bpf_ksym ksym;
953 const struct bpf_prog_ops *ops;
954 struct bpf_map **used_maps;
955 struct mutex used_maps_mutex; /* mutex for used_maps and used_map_cnt */
956 struct btf_mod_pair *used_btfs;
957 struct bpf_prog *prog;
958 struct user_struct *user;
959 u64 load_time; /* ns since boottime */
961 struct bpf_map *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE];
962 char name[BPF_OBJ_NAME_LEN];
963 #ifdef CONFIG_SECURITY
966 struct bpf_prog_offload *offload;
968 struct bpf_func_info *func_info;
969 struct bpf_func_info_aux *func_info_aux;
970 /* bpf_line_info loaded from userspace. linfo->insn_off
971 * has the xlated insn offset.
972 * Both the main and sub prog share the same linfo.
973 * The subprog can access its first linfo by
974 * using the linfo_idx.
976 struct bpf_line_info *linfo;
977 /* jited_linfo is the jited addr of the linfo. It has a
978 * one to one mapping to linfo:
979 * jited_linfo[i] is the jited addr for the linfo[i]->insn_off.
980 * Both the main and sub prog share the same jited_linfo.
981 * The subprog can access its first jited_linfo by
982 * using the linfo_idx.
987 /* subprog can use linfo_idx to access its first linfo and
989 * main prog always has linfo_idx == 0
993 struct exception_table_entry *extable;
995 struct work_struct work;
1000 struct bpf_array_aux {
1001 /* 'Ownership' of prog array is claimed by the first program that
1002 * is going to use this map or by the first program which FD is
1003 * stored in the map to make sure that all callers and callees have
1004 * the same prog type and JITed flag.
1008 enum bpf_prog_type type;
1011 /* Programs with direct jumps into programs part of this array. */
1012 struct list_head poke_progs;
1013 struct bpf_map *map;
1014 struct mutex poke_mutex;
1015 struct work_struct work;
1021 enum bpf_link_type type;
1022 const struct bpf_link_ops *ops;
1023 struct bpf_prog *prog;
1024 struct work_struct work;
1027 struct bpf_link_ops {
1028 void (*release)(struct bpf_link *link);
1029 void (*dealloc)(struct bpf_link *link);
1030 int (*detach)(struct bpf_link *link);
1031 int (*update_prog)(struct bpf_link *link, struct bpf_prog *new_prog,
1032 struct bpf_prog *old_prog);
1033 void (*show_fdinfo)(const struct bpf_link *link, struct seq_file *seq);
1034 int (*fill_link_info)(const struct bpf_link *link,
1035 struct bpf_link_info *info);
1038 struct bpf_link_primer {
1039 struct bpf_link *link;
1045 struct bpf_struct_ops_value;
1048 #define BPF_STRUCT_OPS_MAX_NR_MEMBERS 64
1049 struct bpf_struct_ops {
1050 const struct bpf_verifier_ops *verifier_ops;
1051 int (*init)(struct btf *btf);
1052 int (*check_member)(const struct btf_type *t,
1053 const struct btf_member *member);
1054 int (*init_member)(const struct btf_type *t,
1055 const struct btf_member *member,
1056 void *kdata, const void *udata);
1057 int (*reg)(void *kdata);
1058 void (*unreg)(void *kdata);
1059 const struct btf_type *type;
1060 const struct btf_type *value_type;
1062 struct btf_func_model func_models[BPF_STRUCT_OPS_MAX_NR_MEMBERS];
1067 #if defined(CONFIG_BPF_JIT) && defined(CONFIG_BPF_SYSCALL)
1068 #define BPF_MODULE_OWNER ((void *)((0xeB9FUL << 2) + POISON_POINTER_DELTA))
1069 const struct bpf_struct_ops *bpf_struct_ops_find(u32 type_id);
1070 void bpf_struct_ops_init(struct btf *btf, struct bpf_verifier_log *log);
1071 bool bpf_struct_ops_get(const void *kdata);
1072 void bpf_struct_ops_put(const void *kdata);
1073 int bpf_struct_ops_map_sys_lookup_elem(struct bpf_map *map, void *key,
1075 int bpf_struct_ops_prepare_trampoline(struct bpf_tramp_progs *tprogs,
1076 struct bpf_prog *prog,
1077 const struct btf_func_model *model,
1078 void *image, void *image_end);
1079 static inline bool bpf_try_module_get(const void *data, struct module *owner)
1081 if (owner == BPF_MODULE_OWNER)
1082 return bpf_struct_ops_get(data);
1084 return try_module_get(owner);
1086 static inline void bpf_module_put(const void *data, struct module *owner)
1088 if (owner == BPF_MODULE_OWNER)
1089 bpf_struct_ops_put(data);
1095 /* Define it here to avoid the use of forward declaration */
1096 struct bpf_dummy_ops_state {
1100 struct bpf_dummy_ops {
1101 int (*test_1)(struct bpf_dummy_ops_state *cb);
1102 int (*test_2)(struct bpf_dummy_ops_state *cb, int a1, unsigned short a2,
1103 char a3, unsigned long a4);
1106 int bpf_struct_ops_test_run(struct bpf_prog *prog, const union bpf_attr *kattr,
1107 union bpf_attr __user *uattr);
1110 static inline const struct bpf_struct_ops *bpf_struct_ops_find(u32 type_id)
1114 static inline void bpf_struct_ops_init(struct btf *btf,
1115 struct bpf_verifier_log *log)
1118 static inline bool bpf_try_module_get(const void *data, struct module *owner)
1120 return try_module_get(owner);
1122 static inline void bpf_module_put(const void *data, struct module *owner)
1126 static inline int bpf_struct_ops_map_sys_lookup_elem(struct bpf_map *map,
1138 struct bpf_array_aux *aux;
1140 char value[0] __aligned(8);
1141 void *ptrs[0] __aligned(8);
1142 void __percpu *pptrs[0] __aligned(8);
1146 #define BPF_COMPLEXITY_LIMIT_INSNS 1000000 /* yes. 1M insns */
1147 #define MAX_TAIL_CALL_CNT 33
1149 #define BPF_F_ACCESS_MASK (BPF_F_RDONLY | \
1150 BPF_F_RDONLY_PROG | \
1154 #define BPF_MAP_CAN_READ BIT(0)
1155 #define BPF_MAP_CAN_WRITE BIT(1)
1157 static inline u32 bpf_map_flags_to_cap(struct bpf_map *map)
1159 u32 access_flags = map->map_flags & (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG);
1161 /* Combination of BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG is
1164 if (access_flags & BPF_F_RDONLY_PROG)
1165 return BPF_MAP_CAN_READ;
1166 else if (access_flags & BPF_F_WRONLY_PROG)
1167 return BPF_MAP_CAN_WRITE;
1169 return BPF_MAP_CAN_READ | BPF_MAP_CAN_WRITE;
1172 static inline bool bpf_map_flags_access_ok(u32 access_flags)
1174 return (access_flags & (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG)) !=
1175 (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG);
1178 struct bpf_event_entry {
1179 struct perf_event *event;
1180 struct file *perf_file;
1181 struct file *map_file;
1182 struct rcu_head rcu;
1185 bool bpf_prog_array_compatible(struct bpf_array *array, const struct bpf_prog *fp);
1186 int bpf_prog_calc_tag(struct bpf_prog *fp);
1188 const struct bpf_func_proto *bpf_get_trace_printk_proto(void);
1189 const struct bpf_func_proto *bpf_get_trace_vprintk_proto(void);
1191 typedef unsigned long (*bpf_ctx_copy_t)(void *dst, const void *src,
1192 unsigned long off, unsigned long len);
1193 typedef u32 (*bpf_convert_ctx_access_t)(enum bpf_access_type type,
1194 const struct bpf_insn *src,
1195 struct bpf_insn *dst,
1196 struct bpf_prog *prog,
1199 u64 bpf_event_output(struct bpf_map *map, u64 flags, void *meta, u64 meta_size,
1200 void *ctx, u64 ctx_size, bpf_ctx_copy_t ctx_copy);
1202 /* an array of programs to be executed under rcu_lock.
1205 * ret = BPF_PROG_RUN_ARRAY(&bpf_prog_array, ctx, bpf_prog_run);
1207 * the structure returned by bpf_prog_array_alloc() should be populated
1208 * with program pointers and the last pointer must be NULL.
1209 * The user has to keep refcnt on the program and make sure the program
1210 * is removed from the array before bpf_prog_put().
1211 * The 'struct bpf_prog_array *' should only be replaced with xchg()
1212 * since other cpus are walking the array of pointers in parallel.
1214 struct bpf_prog_array_item {
1215 struct bpf_prog *prog;
1217 struct bpf_cgroup_storage *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE];
1222 struct bpf_prog_array {
1223 struct rcu_head rcu;
1224 struct bpf_prog_array_item items[];
1227 struct bpf_prog_array *bpf_prog_array_alloc(u32 prog_cnt, gfp_t flags);
1228 void bpf_prog_array_free(struct bpf_prog_array *progs);
1229 int bpf_prog_array_length(struct bpf_prog_array *progs);
1230 bool bpf_prog_array_is_empty(struct bpf_prog_array *array);
1231 int bpf_prog_array_copy_to_user(struct bpf_prog_array *progs,
1232 __u32 __user *prog_ids, u32 cnt);
1234 void bpf_prog_array_delete_safe(struct bpf_prog_array *progs,
1235 struct bpf_prog *old_prog);
1236 int bpf_prog_array_delete_safe_at(struct bpf_prog_array *array, int index);
1237 int bpf_prog_array_update_at(struct bpf_prog_array *array, int index,
1238 struct bpf_prog *prog);
1239 int bpf_prog_array_copy_info(struct bpf_prog_array *array,
1240 u32 *prog_ids, u32 request_cnt,
1242 int bpf_prog_array_copy(struct bpf_prog_array *old_array,
1243 struct bpf_prog *exclude_prog,
1244 struct bpf_prog *include_prog,
1246 struct bpf_prog_array **new_array);
1248 struct bpf_run_ctx {};
1250 struct bpf_cg_run_ctx {
1251 struct bpf_run_ctx run_ctx;
1252 const struct bpf_prog_array_item *prog_item;
1255 struct bpf_trace_run_ctx {
1256 struct bpf_run_ctx run_ctx;
1260 static inline struct bpf_run_ctx *bpf_set_run_ctx(struct bpf_run_ctx *new_ctx)
1262 struct bpf_run_ctx *old_ctx = NULL;
1264 #ifdef CONFIG_BPF_SYSCALL
1265 old_ctx = current->bpf_ctx;
1266 current->bpf_ctx = new_ctx;
1271 static inline void bpf_reset_run_ctx(struct bpf_run_ctx *old_ctx)
1273 #ifdef CONFIG_BPF_SYSCALL
1274 current->bpf_ctx = old_ctx;
1278 /* BPF program asks to bypass CAP_NET_BIND_SERVICE in bind. */
1279 #define BPF_RET_BIND_NO_CAP_NET_BIND_SERVICE (1 << 0)
1280 /* BPF program asks to set CN on the packet. */
1281 #define BPF_RET_SET_CN (1 << 0)
1283 typedef u32 (*bpf_prog_run_fn)(const struct bpf_prog *prog, const void *ctx);
1285 static __always_inline u32
1286 BPF_PROG_RUN_ARRAY_CG_FLAGS(const struct bpf_prog_array __rcu *array_rcu,
1287 const void *ctx, bpf_prog_run_fn run_prog,
1290 const struct bpf_prog_array_item *item;
1291 const struct bpf_prog *prog;
1292 const struct bpf_prog_array *array;
1293 struct bpf_run_ctx *old_run_ctx;
1294 struct bpf_cg_run_ctx run_ctx;
1300 array = rcu_dereference(array_rcu);
1301 item = &array->items[0];
1302 old_run_ctx = bpf_set_run_ctx(&run_ctx.run_ctx);
1303 while ((prog = READ_ONCE(item->prog))) {
1304 run_ctx.prog_item = item;
1305 func_ret = run_prog(prog, ctx);
1306 ret &= (func_ret & 1);
1307 *(ret_flags) |= (func_ret >> 1);
1310 bpf_reset_run_ctx(old_run_ctx);
1316 static __always_inline u32
1317 BPF_PROG_RUN_ARRAY_CG(const struct bpf_prog_array __rcu *array_rcu,
1318 const void *ctx, bpf_prog_run_fn run_prog)
1320 const struct bpf_prog_array_item *item;
1321 const struct bpf_prog *prog;
1322 const struct bpf_prog_array *array;
1323 struct bpf_run_ctx *old_run_ctx;
1324 struct bpf_cg_run_ctx run_ctx;
1329 array = rcu_dereference(array_rcu);
1330 item = &array->items[0];
1331 old_run_ctx = bpf_set_run_ctx(&run_ctx.run_ctx);
1332 while ((prog = READ_ONCE(item->prog))) {
1333 run_ctx.prog_item = item;
1334 ret &= run_prog(prog, ctx);
1337 bpf_reset_run_ctx(old_run_ctx);
1343 static __always_inline u32
1344 BPF_PROG_RUN_ARRAY(const struct bpf_prog_array __rcu *array_rcu,
1345 const void *ctx, bpf_prog_run_fn run_prog)
1347 const struct bpf_prog_array_item *item;
1348 const struct bpf_prog *prog;
1349 const struct bpf_prog_array *array;
1350 struct bpf_run_ctx *old_run_ctx;
1351 struct bpf_trace_run_ctx run_ctx;
1356 array = rcu_dereference(array_rcu);
1357 if (unlikely(!array))
1359 old_run_ctx = bpf_set_run_ctx(&run_ctx.run_ctx);
1360 item = &array->items[0];
1361 while ((prog = READ_ONCE(item->prog))) {
1362 run_ctx.bpf_cookie = item->bpf_cookie;
1363 ret &= run_prog(prog, ctx);
1366 bpf_reset_run_ctx(old_run_ctx);
1373 /* To be used by __cgroup_bpf_run_filter_skb for EGRESS BPF progs
1374 * so BPF programs can request cwr for TCP packets.
1376 * Current cgroup skb programs can only return 0 or 1 (0 to drop the
1377 * packet. This macro changes the behavior so the low order bit
1378 * indicates whether the packet should be dropped (0) or not (1)
1379 * and the next bit is a congestion notification bit. This could be
1380 * used by TCP to call tcp_enter_cwr()
1382 * Hence, new allowed return values of CGROUP EGRESS BPF programs are:
1385 * 2: drop packet and cn
1386 * 3: keep packet and cn
1388 * This macro then converts it to one of the NET_XMIT or an error
1389 * code that is then interpreted as drop packet (and no cn):
1390 * 0: NET_XMIT_SUCCESS skb should be transmitted
1391 * 1: NET_XMIT_DROP skb should be dropped and cn
1392 * 2: NET_XMIT_CN skb should be transmitted and cn
1393 * 3: -EPERM skb should be dropped
1395 #define BPF_PROG_CGROUP_INET_EGRESS_RUN_ARRAY(array, ctx, func) \
1400 _ret = BPF_PROG_RUN_ARRAY_CG_FLAGS(array, ctx, func, &_flags); \
1401 _cn = _flags & BPF_RET_SET_CN; \
1403 _ret = (_cn ? NET_XMIT_CN : NET_XMIT_SUCCESS); \
1405 _ret = (_cn ? NET_XMIT_DROP : -EPERM); \
1409 #ifdef CONFIG_BPF_SYSCALL
1410 DECLARE_PER_CPU(int, bpf_prog_active);
1411 extern struct mutex bpf_stats_enabled_mutex;
1414 * Block execution of BPF programs attached to instrumentation (perf,
1415 * kprobes, tracepoints) to prevent deadlocks on map operations as any of
1416 * these events can happen inside a region which holds a map bucket lock
1417 * and can deadlock on it.
1419 static inline void bpf_disable_instrumentation(void)
1422 this_cpu_inc(bpf_prog_active);
1425 static inline void bpf_enable_instrumentation(void)
1427 this_cpu_dec(bpf_prog_active);
1431 extern const struct file_operations bpf_map_fops;
1432 extern const struct file_operations bpf_prog_fops;
1433 extern const struct file_operations bpf_iter_fops;
1435 #define BPF_PROG_TYPE(_id, _name, prog_ctx_type, kern_ctx_type) \
1436 extern const struct bpf_prog_ops _name ## _prog_ops; \
1437 extern const struct bpf_verifier_ops _name ## _verifier_ops;
1438 #define BPF_MAP_TYPE(_id, _ops) \
1439 extern const struct bpf_map_ops _ops;
1440 #define BPF_LINK_TYPE(_id, _name)
1441 #include <linux/bpf_types.h>
1442 #undef BPF_PROG_TYPE
1444 #undef BPF_LINK_TYPE
1446 extern const struct bpf_prog_ops bpf_offload_prog_ops;
1447 extern const struct bpf_verifier_ops tc_cls_act_analyzer_ops;
1448 extern const struct bpf_verifier_ops xdp_analyzer_ops;
1450 struct bpf_prog *bpf_prog_get(u32 ufd);
1451 struct bpf_prog *bpf_prog_get_type_dev(u32 ufd, enum bpf_prog_type type,
1453 void bpf_prog_add(struct bpf_prog *prog, int i);
1454 void bpf_prog_sub(struct bpf_prog *prog, int i);
1455 void bpf_prog_inc(struct bpf_prog *prog);
1456 struct bpf_prog * __must_check bpf_prog_inc_not_zero(struct bpf_prog *prog);
1457 void bpf_prog_put(struct bpf_prog *prog);
1459 void bpf_prog_free_id(struct bpf_prog *prog, bool do_idr_lock);
1460 void bpf_map_free_id(struct bpf_map *map, bool do_idr_lock);
1462 struct bpf_map *bpf_map_get(u32 ufd);
1463 struct bpf_map *bpf_map_get_with_uref(u32 ufd);
1464 struct bpf_map *__bpf_map_get(struct fd f);
1465 void bpf_map_inc(struct bpf_map *map);
1466 void bpf_map_inc_with_uref(struct bpf_map *map);
1467 struct bpf_map * __must_check bpf_map_inc_not_zero(struct bpf_map *map);
1468 void bpf_map_put_with_uref(struct bpf_map *map);
1469 void bpf_map_put(struct bpf_map *map);
1470 void *bpf_map_area_alloc(u64 size, int numa_node);
1471 void *bpf_map_area_mmapable_alloc(u64 size, int numa_node);
1472 void bpf_map_area_free(void *base);
1473 bool bpf_map_write_active(const struct bpf_map *map);
1474 void bpf_map_init_from_attr(struct bpf_map *map, union bpf_attr *attr);
1475 int generic_map_lookup_batch(struct bpf_map *map,
1476 const union bpf_attr *attr,
1477 union bpf_attr __user *uattr);
1478 int generic_map_update_batch(struct bpf_map *map,
1479 const union bpf_attr *attr,
1480 union bpf_attr __user *uattr);
1481 int generic_map_delete_batch(struct bpf_map *map,
1482 const union bpf_attr *attr,
1483 union bpf_attr __user *uattr);
1484 struct bpf_map *bpf_map_get_curr_or_next(u32 *id);
1485 struct bpf_prog *bpf_prog_get_curr_or_next(u32 *id);
1487 #ifdef CONFIG_MEMCG_KMEM
1488 void *bpf_map_kmalloc_node(const struct bpf_map *map, size_t size, gfp_t flags,
1490 void *bpf_map_kzalloc(const struct bpf_map *map, size_t size, gfp_t flags);
1491 void __percpu *bpf_map_alloc_percpu(const struct bpf_map *map, size_t size,
1492 size_t align, gfp_t flags);
1494 static inline void *
1495 bpf_map_kmalloc_node(const struct bpf_map *map, size_t size, gfp_t flags,
1498 return kmalloc_node(size, flags, node);
1501 static inline void *
1502 bpf_map_kzalloc(const struct bpf_map *map, size_t size, gfp_t flags)
1504 return kzalloc(size, flags);
1507 static inline void __percpu *
1508 bpf_map_alloc_percpu(const struct bpf_map *map, size_t size, size_t align,
1511 return __alloc_percpu_gfp(size, align, flags);
1515 extern int sysctl_unprivileged_bpf_disabled;
1517 static inline bool bpf_allow_ptr_leaks(void)
1519 return perfmon_capable();
1522 static inline bool bpf_allow_uninit_stack(void)
1524 return perfmon_capable();
1527 static inline bool bpf_allow_ptr_to_map_access(void)
1529 return perfmon_capable();
1532 static inline bool bpf_bypass_spec_v1(void)
1534 return perfmon_capable();
1537 static inline bool bpf_bypass_spec_v4(void)
1539 return perfmon_capable();
1542 int bpf_map_new_fd(struct bpf_map *map, int flags);
1543 int bpf_prog_new_fd(struct bpf_prog *prog);
1545 void bpf_link_init(struct bpf_link *link, enum bpf_link_type type,
1546 const struct bpf_link_ops *ops, struct bpf_prog *prog);
1547 int bpf_link_prime(struct bpf_link *link, struct bpf_link_primer *primer);
1548 int bpf_link_settle(struct bpf_link_primer *primer);
1549 void bpf_link_cleanup(struct bpf_link_primer *primer);
1550 void bpf_link_inc(struct bpf_link *link);
1551 void bpf_link_put(struct bpf_link *link);
1552 int bpf_link_new_fd(struct bpf_link *link);
1553 struct file *bpf_link_new_file(struct bpf_link *link, int *reserved_fd);
1554 struct bpf_link *bpf_link_get_from_fd(u32 ufd);
1556 int bpf_obj_pin_user(u32 ufd, const char __user *pathname);
1557 int bpf_obj_get_user(const char __user *pathname, int flags);
1559 #define BPF_ITER_FUNC_PREFIX "bpf_iter_"
1560 #define DEFINE_BPF_ITER_FUNC(target, args...) \
1561 extern int bpf_iter_ ## target(args); \
1562 int __init bpf_iter_ ## target(args) { return 0; }
1564 struct bpf_iter_aux_info {
1565 struct bpf_map *map;
1568 typedef int (*bpf_iter_attach_target_t)(struct bpf_prog *prog,
1569 union bpf_iter_link_info *linfo,
1570 struct bpf_iter_aux_info *aux);
1571 typedef void (*bpf_iter_detach_target_t)(struct bpf_iter_aux_info *aux);
1572 typedef void (*bpf_iter_show_fdinfo_t) (const struct bpf_iter_aux_info *aux,
1573 struct seq_file *seq);
1574 typedef int (*bpf_iter_fill_link_info_t)(const struct bpf_iter_aux_info *aux,
1575 struct bpf_link_info *info);
1576 typedef const struct bpf_func_proto *
1577 (*bpf_iter_get_func_proto_t)(enum bpf_func_id func_id,
1578 const struct bpf_prog *prog);
1580 enum bpf_iter_feature {
1581 BPF_ITER_RESCHED = BIT(0),
1584 #define BPF_ITER_CTX_ARG_MAX 2
1585 struct bpf_iter_reg {
1587 bpf_iter_attach_target_t attach_target;
1588 bpf_iter_detach_target_t detach_target;
1589 bpf_iter_show_fdinfo_t show_fdinfo;
1590 bpf_iter_fill_link_info_t fill_link_info;
1591 bpf_iter_get_func_proto_t get_func_proto;
1592 u32 ctx_arg_info_size;
1594 struct bpf_ctx_arg_aux ctx_arg_info[BPF_ITER_CTX_ARG_MAX];
1595 const struct bpf_iter_seq_info *seq_info;
1598 struct bpf_iter_meta {
1599 __bpf_md_ptr(struct seq_file *, seq);
1604 struct bpf_iter__bpf_map_elem {
1605 __bpf_md_ptr(struct bpf_iter_meta *, meta);
1606 __bpf_md_ptr(struct bpf_map *, map);
1607 __bpf_md_ptr(void *, key);
1608 __bpf_md_ptr(void *, value);
1611 int bpf_iter_reg_target(const struct bpf_iter_reg *reg_info);
1612 void bpf_iter_unreg_target(const struct bpf_iter_reg *reg_info);
1613 bool bpf_iter_prog_supported(struct bpf_prog *prog);
1614 const struct bpf_func_proto *
1615 bpf_iter_get_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog);
1616 int bpf_iter_link_attach(const union bpf_attr *attr, bpfptr_t uattr, struct bpf_prog *prog);
1617 int bpf_iter_new_fd(struct bpf_link *link);
1618 bool bpf_link_is_iter(struct bpf_link *link);
1619 struct bpf_prog *bpf_iter_get_info(struct bpf_iter_meta *meta, bool in_stop);
1620 int bpf_iter_run_prog(struct bpf_prog *prog, void *ctx);
1621 void bpf_iter_map_show_fdinfo(const struct bpf_iter_aux_info *aux,
1622 struct seq_file *seq);
1623 int bpf_iter_map_fill_link_info(const struct bpf_iter_aux_info *aux,
1624 struct bpf_link_info *info);
1626 int map_set_for_each_callback_args(struct bpf_verifier_env *env,
1627 struct bpf_func_state *caller,
1628 struct bpf_func_state *callee);
1630 int bpf_percpu_hash_copy(struct bpf_map *map, void *key, void *value);
1631 int bpf_percpu_array_copy(struct bpf_map *map, void *key, void *value);
1632 int bpf_percpu_hash_update(struct bpf_map *map, void *key, void *value,
1634 int bpf_percpu_array_update(struct bpf_map *map, void *key, void *value,
1637 int bpf_stackmap_copy(struct bpf_map *map, void *key, void *value);
1639 int bpf_fd_array_map_update_elem(struct bpf_map *map, struct file *map_file,
1640 void *key, void *value, u64 map_flags);
1641 int bpf_fd_array_map_lookup_elem(struct bpf_map *map, void *key, u32 *value);
1642 int bpf_fd_htab_map_update_elem(struct bpf_map *map, struct file *map_file,
1643 void *key, void *value, u64 map_flags);
1644 int bpf_fd_htab_map_lookup_elem(struct bpf_map *map, void *key, u32 *value);
1646 int bpf_get_file_flag(int flags);
1647 int bpf_check_uarg_tail_zero(bpfptr_t uaddr, size_t expected_size,
1648 size_t actual_size);
1650 /* memcpy that is used with 8-byte aligned pointers, power-of-8 size and
1651 * forced to use 'long' read/writes to try to atomically copy long counters.
1652 * Best-effort only. No barriers here, since it _will_ race with concurrent
1653 * updates from BPF programs. Called from bpf syscall and mostly used with
1654 * size 8 or 16 bytes, so ask compiler to inline it.
1656 static inline void bpf_long_memcpy(void *dst, const void *src, u32 size)
1658 const long *lsrc = src;
1661 size /= sizeof(long);
1666 /* verify correctness of eBPF program */
1667 int bpf_check(struct bpf_prog **fp, union bpf_attr *attr, bpfptr_t uattr);
1669 #ifndef CONFIG_BPF_JIT_ALWAYS_ON
1670 void bpf_patch_call_args(struct bpf_insn *insn, u32 stack_depth);
1673 struct btf *bpf_get_btf_vmlinux(void);
1678 struct bpf_dtab_netdev;
1679 struct bpf_cpu_map_entry;
1681 void __dev_flush(void);
1682 int dev_xdp_enqueue(struct net_device *dev, struct xdp_frame *xdpf,
1683 struct net_device *dev_rx);
1684 int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_frame *xdpf,
1685 struct net_device *dev_rx);
1686 int dev_map_enqueue_multi(struct xdp_frame *xdpf, struct net_device *dev_rx,
1687 struct bpf_map *map, bool exclude_ingress);
1688 int dev_map_generic_redirect(struct bpf_dtab_netdev *dst, struct sk_buff *skb,
1689 struct bpf_prog *xdp_prog);
1690 int dev_map_redirect_multi(struct net_device *dev, struct sk_buff *skb,
1691 struct bpf_prog *xdp_prog, struct bpf_map *map,
1692 bool exclude_ingress);
1694 void __cpu_map_flush(void);
1695 int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu, struct xdp_frame *xdpf,
1696 struct net_device *dev_rx);
1697 int cpu_map_generic_redirect(struct bpf_cpu_map_entry *rcpu,
1698 struct sk_buff *skb);
1700 /* Return map's numa specified by userspace */
1701 static inline int bpf_map_attr_numa_node(const union bpf_attr *attr)
1703 return (attr->map_flags & BPF_F_NUMA_NODE) ?
1704 attr->numa_node : NUMA_NO_NODE;
1707 struct bpf_prog *bpf_prog_get_type_path(const char *name, enum bpf_prog_type type);
1708 int array_map_alloc_check(union bpf_attr *attr);
1710 int bpf_prog_test_run_xdp(struct bpf_prog *prog, const union bpf_attr *kattr,
1711 union bpf_attr __user *uattr);
1712 int bpf_prog_test_run_skb(struct bpf_prog *prog, const union bpf_attr *kattr,
1713 union bpf_attr __user *uattr);
1714 int bpf_prog_test_run_tracing(struct bpf_prog *prog,
1715 const union bpf_attr *kattr,
1716 union bpf_attr __user *uattr);
1717 int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog,
1718 const union bpf_attr *kattr,
1719 union bpf_attr __user *uattr);
1720 int bpf_prog_test_run_raw_tp(struct bpf_prog *prog,
1721 const union bpf_attr *kattr,
1722 union bpf_attr __user *uattr);
1723 int bpf_prog_test_run_sk_lookup(struct bpf_prog *prog,
1724 const union bpf_attr *kattr,
1725 union bpf_attr __user *uattr);
1726 bool bpf_prog_test_check_kfunc_call(u32 kfunc_id, struct module *owner);
1727 bool btf_ctx_access(int off, int size, enum bpf_access_type type,
1728 const struct bpf_prog *prog,
1729 struct bpf_insn_access_aux *info);
1731 static inline bool bpf_tracing_ctx_access(int off, int size,
1732 enum bpf_access_type type)
1734 if (off < 0 || off >= sizeof(__u64) * MAX_BPF_FUNC_ARGS)
1736 if (type != BPF_READ)
1738 if (off % size != 0)
1743 static inline bool bpf_tracing_btf_ctx_access(int off, int size,
1744 enum bpf_access_type type,
1745 const struct bpf_prog *prog,
1746 struct bpf_insn_access_aux *info)
1748 if (!bpf_tracing_ctx_access(off, size, type))
1750 return btf_ctx_access(off, size, type, prog, info);
1753 int btf_struct_access(struct bpf_verifier_log *log, const struct btf *btf,
1754 const struct btf_type *t, int off, int size,
1755 enum bpf_access_type atype,
1757 bool btf_struct_ids_match(struct bpf_verifier_log *log,
1758 const struct btf *btf, u32 id, int off,
1759 const struct btf *need_btf, u32 need_type_id);
1761 int btf_distill_func_proto(struct bpf_verifier_log *log,
1763 const struct btf_type *func_proto,
1764 const char *func_name,
1765 struct btf_func_model *m);
1767 struct bpf_reg_state;
1768 int btf_check_subprog_arg_match(struct bpf_verifier_env *env, int subprog,
1769 struct bpf_reg_state *regs);
1770 int btf_check_kfunc_arg_match(struct bpf_verifier_env *env,
1771 const struct btf *btf, u32 func_id,
1772 struct bpf_reg_state *regs);
1773 int btf_prepare_func_args(struct bpf_verifier_env *env, int subprog,
1774 struct bpf_reg_state *reg);
1775 int btf_check_type_match(struct bpf_verifier_log *log, const struct bpf_prog *prog,
1776 struct btf *btf, const struct btf_type *t);
1778 struct bpf_prog *bpf_prog_by_id(u32 id);
1779 struct bpf_link *bpf_link_by_id(u32 id);
1781 const struct bpf_func_proto *bpf_base_func_proto(enum bpf_func_id func_id);
1782 void bpf_task_storage_free(struct task_struct *task);
1783 bool bpf_prog_has_kfunc_call(const struct bpf_prog *prog);
1784 const struct btf_func_model *
1785 bpf_jit_find_kfunc_model(const struct bpf_prog *prog,
1786 const struct bpf_insn *insn);
1787 struct bpf_core_ctx {
1788 struct bpf_verifier_log *log;
1789 const struct btf *btf;
1792 int bpf_core_apply(struct bpf_core_ctx *ctx, const struct bpf_core_relo *relo,
1793 int relo_idx, void *insn);
1795 #else /* !CONFIG_BPF_SYSCALL */
1796 static inline struct bpf_prog *bpf_prog_get(u32 ufd)
1798 return ERR_PTR(-EOPNOTSUPP);
1801 static inline struct bpf_prog *bpf_prog_get_type_dev(u32 ufd,
1802 enum bpf_prog_type type,
1805 return ERR_PTR(-EOPNOTSUPP);
1808 static inline void bpf_prog_add(struct bpf_prog *prog, int i)
1812 static inline void bpf_prog_sub(struct bpf_prog *prog, int i)
1816 static inline void bpf_prog_put(struct bpf_prog *prog)
1820 static inline void bpf_prog_inc(struct bpf_prog *prog)
1824 static inline struct bpf_prog *__must_check
1825 bpf_prog_inc_not_zero(struct bpf_prog *prog)
1827 return ERR_PTR(-EOPNOTSUPP);
1830 static inline void bpf_link_init(struct bpf_link *link, enum bpf_link_type type,
1831 const struct bpf_link_ops *ops,
1832 struct bpf_prog *prog)
1836 static inline int bpf_link_prime(struct bpf_link *link,
1837 struct bpf_link_primer *primer)
1842 static inline int bpf_link_settle(struct bpf_link_primer *primer)
1847 static inline void bpf_link_cleanup(struct bpf_link_primer *primer)
1851 static inline void bpf_link_inc(struct bpf_link *link)
1855 static inline void bpf_link_put(struct bpf_link *link)
1859 static inline int bpf_obj_get_user(const char __user *pathname, int flags)
1864 static inline bool dev_map_can_have_prog(struct bpf_map *map)
1869 static inline void __dev_flush(void)
1874 struct bpf_dtab_netdev;
1875 struct bpf_cpu_map_entry;
1878 int dev_xdp_enqueue(struct net_device *dev, struct xdp_frame *xdpf,
1879 struct net_device *dev_rx)
1885 int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_frame *xdpf,
1886 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)
1900 static inline int dev_map_generic_redirect(struct bpf_dtab_netdev *dst,
1901 struct sk_buff *skb,
1902 struct bpf_prog *xdp_prog)
1908 int dev_map_redirect_multi(struct net_device *dev, struct sk_buff *skb,
1909 struct bpf_prog *xdp_prog, struct bpf_map *map,
1910 bool exclude_ingress)
1915 static inline void __cpu_map_flush(void)
1919 static inline int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu,
1920 struct xdp_frame *xdpf,
1921 struct net_device *dev_rx)
1926 static inline int cpu_map_generic_redirect(struct bpf_cpu_map_entry *rcpu,
1927 struct sk_buff *skb)
1932 static inline bool cpu_map_prog_allowed(struct bpf_map *map)
1937 static inline struct bpf_prog *bpf_prog_get_type_path(const char *name,
1938 enum bpf_prog_type type)
1940 return ERR_PTR(-EOPNOTSUPP);
1943 static inline int bpf_prog_test_run_xdp(struct bpf_prog *prog,
1944 const union bpf_attr *kattr,
1945 union bpf_attr __user *uattr)
1950 static inline int bpf_prog_test_run_skb(struct bpf_prog *prog,
1951 const union bpf_attr *kattr,
1952 union bpf_attr __user *uattr)
1957 static inline int bpf_prog_test_run_tracing(struct bpf_prog *prog,
1958 const union bpf_attr *kattr,
1959 union bpf_attr __user *uattr)
1964 static inline int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog,
1965 const union bpf_attr *kattr,
1966 union bpf_attr __user *uattr)
1971 static inline int bpf_prog_test_run_sk_lookup(struct bpf_prog *prog,
1972 const union bpf_attr *kattr,
1973 union bpf_attr __user *uattr)
1978 static inline bool bpf_prog_test_check_kfunc_call(u32 kfunc_id,
1979 struct module *owner)
1984 static inline void bpf_map_put(struct bpf_map *map)
1988 static inline struct bpf_prog *bpf_prog_by_id(u32 id)
1990 return ERR_PTR(-ENOTSUPP);
1993 static inline const struct bpf_func_proto *
1994 bpf_base_func_proto(enum bpf_func_id func_id)
1999 static inline void bpf_task_storage_free(struct task_struct *task)
2003 static inline bool bpf_prog_has_kfunc_call(const struct bpf_prog *prog)
2008 static inline const struct btf_func_model *
2009 bpf_jit_find_kfunc_model(const struct bpf_prog *prog,
2010 const struct bpf_insn *insn)
2014 #endif /* CONFIG_BPF_SYSCALL */
2016 void __bpf_free_used_btfs(struct bpf_prog_aux *aux,
2017 struct btf_mod_pair *used_btfs, u32 len);
2019 static inline struct bpf_prog *bpf_prog_get_type(u32 ufd,
2020 enum bpf_prog_type type)
2022 return bpf_prog_get_type_dev(ufd, type, false);
2025 void __bpf_free_used_maps(struct bpf_prog_aux *aux,
2026 struct bpf_map **used_maps, u32 len);
2028 bool bpf_prog_get_ok(struct bpf_prog *, enum bpf_prog_type *, bool);
2030 int bpf_prog_offload_compile(struct bpf_prog *prog);
2031 void bpf_prog_offload_destroy(struct bpf_prog *prog);
2032 int bpf_prog_offload_info_fill(struct bpf_prog_info *info,
2033 struct bpf_prog *prog);
2035 int bpf_map_offload_info_fill(struct bpf_map_info *info, struct bpf_map *map);
2037 int bpf_map_offload_lookup_elem(struct bpf_map *map, void *key, void *value);
2038 int bpf_map_offload_update_elem(struct bpf_map *map,
2039 void *key, void *value, u64 flags);
2040 int bpf_map_offload_delete_elem(struct bpf_map *map, void *key);
2041 int bpf_map_offload_get_next_key(struct bpf_map *map,
2042 void *key, void *next_key);
2044 bool bpf_offload_prog_map_match(struct bpf_prog *prog, struct bpf_map *map);
2046 struct bpf_offload_dev *
2047 bpf_offload_dev_create(const struct bpf_prog_offload_ops *ops, void *priv);
2048 void bpf_offload_dev_destroy(struct bpf_offload_dev *offdev);
2049 void *bpf_offload_dev_priv(struct bpf_offload_dev *offdev);
2050 int bpf_offload_dev_netdev_register(struct bpf_offload_dev *offdev,
2051 struct net_device *netdev);
2052 void bpf_offload_dev_netdev_unregister(struct bpf_offload_dev *offdev,
2053 struct net_device *netdev);
2054 bool bpf_offload_dev_match(struct bpf_prog *prog, struct net_device *netdev);
2056 #if defined(CONFIG_NET) && defined(CONFIG_BPF_SYSCALL)
2057 int bpf_prog_offload_init(struct bpf_prog *prog, union bpf_attr *attr);
2059 static inline bool bpf_prog_is_dev_bound(const struct bpf_prog_aux *aux)
2061 return aux->offload_requested;
2064 static inline bool bpf_map_is_dev_bound(struct bpf_map *map)
2066 return unlikely(map->ops == &bpf_map_offload_ops);
2069 struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr);
2070 void bpf_map_offload_map_free(struct bpf_map *map);
2071 int bpf_prog_test_run_syscall(struct bpf_prog *prog,
2072 const union bpf_attr *kattr,
2073 union bpf_attr __user *uattr);
2075 int sock_map_get_from_fd(const union bpf_attr *attr, struct bpf_prog *prog);
2076 int sock_map_prog_detach(const union bpf_attr *attr, enum bpf_prog_type ptype);
2077 int sock_map_update_elem_sys(struct bpf_map *map, void *key, void *value, u64 flags);
2078 void sock_map_unhash(struct sock *sk);
2079 void sock_map_close(struct sock *sk, long timeout);
2081 static inline int bpf_prog_offload_init(struct bpf_prog *prog,
2082 union bpf_attr *attr)
2087 static inline bool bpf_prog_is_dev_bound(struct bpf_prog_aux *aux)
2092 static inline bool bpf_map_is_dev_bound(struct bpf_map *map)
2097 static inline struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr)
2099 return ERR_PTR(-EOPNOTSUPP);
2102 static inline void bpf_map_offload_map_free(struct bpf_map *map)
2106 static inline int bpf_prog_test_run_syscall(struct bpf_prog *prog,
2107 const union bpf_attr *kattr,
2108 union bpf_attr __user *uattr)
2113 #ifdef CONFIG_BPF_SYSCALL
2114 static inline int sock_map_get_from_fd(const union bpf_attr *attr,
2115 struct bpf_prog *prog)
2120 static inline int sock_map_prog_detach(const union bpf_attr *attr,
2121 enum bpf_prog_type ptype)
2126 static inline int sock_map_update_elem_sys(struct bpf_map *map, void *key, void *value,
2131 #endif /* CONFIG_BPF_SYSCALL */
2132 #endif /* CONFIG_NET && CONFIG_BPF_SYSCALL */
2134 #if defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL)
2135 void bpf_sk_reuseport_detach(struct sock *sk);
2136 int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map, void *key,
2138 int bpf_fd_reuseport_array_update_elem(struct bpf_map *map, void *key,
2139 void *value, u64 map_flags);
2141 static inline void bpf_sk_reuseport_detach(struct sock *sk)
2145 #ifdef CONFIG_BPF_SYSCALL
2146 static inline int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map,
2147 void *key, void *value)
2152 static inline int bpf_fd_reuseport_array_update_elem(struct bpf_map *map,
2153 void *key, void *value,
2158 #endif /* CONFIG_BPF_SYSCALL */
2159 #endif /* defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL) */
2161 /* verifier prototypes for helper functions called from eBPF programs */
2162 extern const struct bpf_func_proto bpf_map_lookup_elem_proto;
2163 extern const struct bpf_func_proto bpf_map_update_elem_proto;
2164 extern const struct bpf_func_proto bpf_map_delete_elem_proto;
2165 extern const struct bpf_func_proto bpf_map_push_elem_proto;
2166 extern const struct bpf_func_proto bpf_map_pop_elem_proto;
2167 extern const struct bpf_func_proto bpf_map_peek_elem_proto;
2169 extern const struct bpf_func_proto bpf_get_prandom_u32_proto;
2170 extern const struct bpf_func_proto bpf_get_smp_processor_id_proto;
2171 extern const struct bpf_func_proto bpf_get_numa_node_id_proto;
2172 extern const struct bpf_func_proto bpf_tail_call_proto;
2173 extern const struct bpf_func_proto bpf_ktime_get_ns_proto;
2174 extern const struct bpf_func_proto bpf_ktime_get_boot_ns_proto;
2175 extern const struct bpf_func_proto bpf_get_current_pid_tgid_proto;
2176 extern const struct bpf_func_proto bpf_get_current_uid_gid_proto;
2177 extern const struct bpf_func_proto bpf_get_current_comm_proto;
2178 extern const struct bpf_func_proto bpf_get_stackid_proto;
2179 extern const struct bpf_func_proto bpf_get_stack_proto;
2180 extern const struct bpf_func_proto bpf_get_task_stack_proto;
2181 extern const struct bpf_func_proto bpf_get_stackid_proto_pe;
2182 extern const struct bpf_func_proto bpf_get_stack_proto_pe;
2183 extern const struct bpf_func_proto bpf_sock_map_update_proto;
2184 extern const struct bpf_func_proto bpf_sock_hash_update_proto;
2185 extern const struct bpf_func_proto bpf_get_current_cgroup_id_proto;
2186 extern const struct bpf_func_proto bpf_get_current_ancestor_cgroup_id_proto;
2187 extern const struct bpf_func_proto bpf_msg_redirect_hash_proto;
2188 extern const struct bpf_func_proto bpf_msg_redirect_map_proto;
2189 extern const struct bpf_func_proto bpf_sk_redirect_hash_proto;
2190 extern const struct bpf_func_proto bpf_sk_redirect_map_proto;
2191 extern const struct bpf_func_proto bpf_spin_lock_proto;
2192 extern const struct bpf_func_proto bpf_spin_unlock_proto;
2193 extern const struct bpf_func_proto bpf_get_local_storage_proto;
2194 extern const struct bpf_func_proto bpf_strtol_proto;
2195 extern const struct bpf_func_proto bpf_strtoul_proto;
2196 extern const struct bpf_func_proto bpf_tcp_sock_proto;
2197 extern const struct bpf_func_proto bpf_jiffies64_proto;
2198 extern const struct bpf_func_proto bpf_get_ns_current_pid_tgid_proto;
2199 extern const struct bpf_func_proto bpf_event_output_data_proto;
2200 extern const struct bpf_func_proto bpf_ringbuf_output_proto;
2201 extern const struct bpf_func_proto bpf_ringbuf_reserve_proto;
2202 extern const struct bpf_func_proto bpf_ringbuf_submit_proto;
2203 extern const struct bpf_func_proto bpf_ringbuf_discard_proto;
2204 extern const struct bpf_func_proto bpf_ringbuf_query_proto;
2205 extern const struct bpf_func_proto bpf_skc_to_tcp6_sock_proto;
2206 extern const struct bpf_func_proto bpf_skc_to_tcp_sock_proto;
2207 extern const struct bpf_func_proto bpf_skc_to_tcp_timewait_sock_proto;
2208 extern const struct bpf_func_proto bpf_skc_to_tcp_request_sock_proto;
2209 extern const struct bpf_func_proto bpf_skc_to_udp6_sock_proto;
2210 extern const struct bpf_func_proto bpf_skc_to_unix_sock_proto;
2211 extern const struct bpf_func_proto bpf_copy_from_user_proto;
2212 extern const struct bpf_func_proto bpf_snprintf_btf_proto;
2213 extern const struct bpf_func_proto bpf_snprintf_proto;
2214 extern const struct bpf_func_proto bpf_per_cpu_ptr_proto;
2215 extern const struct bpf_func_proto bpf_this_cpu_ptr_proto;
2216 extern const struct bpf_func_proto bpf_ktime_get_coarse_ns_proto;
2217 extern const struct bpf_func_proto bpf_sock_from_file_proto;
2218 extern const struct bpf_func_proto bpf_get_socket_ptr_cookie_proto;
2219 extern const struct bpf_func_proto bpf_task_storage_get_proto;
2220 extern const struct bpf_func_proto bpf_task_storage_delete_proto;
2221 extern const struct bpf_func_proto bpf_for_each_map_elem_proto;
2222 extern const struct bpf_func_proto bpf_btf_find_by_name_kind_proto;
2223 extern const struct bpf_func_proto bpf_sk_setsockopt_proto;
2224 extern const struct bpf_func_proto bpf_sk_getsockopt_proto;
2225 extern const struct bpf_func_proto bpf_kallsyms_lookup_name_proto;
2226 extern const struct bpf_func_proto bpf_find_vma_proto;
2227 extern const struct bpf_func_proto bpf_loop_proto;
2228 extern const struct bpf_func_proto bpf_strncmp_proto;
2230 const struct bpf_func_proto *tracing_prog_func_proto(
2231 enum bpf_func_id func_id, const struct bpf_prog *prog);
2233 /* Shared helpers among cBPF and eBPF. */
2234 void bpf_user_rnd_init_once(void);
2235 u64 bpf_user_rnd_u32(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
2236 u64 bpf_get_raw_cpu_id(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
2238 #if defined(CONFIG_NET)
2239 bool bpf_sock_common_is_valid_access(int off, int size,
2240 enum bpf_access_type type,
2241 struct bpf_insn_access_aux *info);
2242 bool bpf_sock_is_valid_access(int off, int size, enum bpf_access_type type,
2243 struct bpf_insn_access_aux *info);
2244 u32 bpf_sock_convert_ctx_access(enum bpf_access_type type,
2245 const struct bpf_insn *si,
2246 struct bpf_insn *insn_buf,
2247 struct bpf_prog *prog,
2250 static inline bool bpf_sock_common_is_valid_access(int off, int size,
2251 enum bpf_access_type type,
2252 struct bpf_insn_access_aux *info)
2256 static inline bool bpf_sock_is_valid_access(int off, int size,
2257 enum bpf_access_type type,
2258 struct bpf_insn_access_aux *info)
2262 static inline u32 bpf_sock_convert_ctx_access(enum bpf_access_type type,
2263 const struct bpf_insn *si,
2264 struct bpf_insn *insn_buf,
2265 struct bpf_prog *prog,
2273 struct sk_reuseport_kern {
2274 struct sk_buff *skb;
2276 struct sock *selected_sk;
2277 struct sock *migrating_sk;
2283 bool bpf_tcp_sock_is_valid_access(int off, int size, enum bpf_access_type type,
2284 struct bpf_insn_access_aux *info);
2286 u32 bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type,
2287 const struct bpf_insn *si,
2288 struct bpf_insn *insn_buf,
2289 struct bpf_prog *prog,
2292 bool bpf_xdp_sock_is_valid_access(int off, int size, enum bpf_access_type type,
2293 struct bpf_insn_access_aux *info);
2295 u32 bpf_xdp_sock_convert_ctx_access(enum bpf_access_type type,
2296 const struct bpf_insn *si,
2297 struct bpf_insn *insn_buf,
2298 struct bpf_prog *prog,
2301 static inline bool bpf_tcp_sock_is_valid_access(int off, int size,
2302 enum bpf_access_type type,
2303 struct bpf_insn_access_aux *info)
2308 static inline u32 bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type,
2309 const struct bpf_insn *si,
2310 struct bpf_insn *insn_buf,
2311 struct bpf_prog *prog,
2316 static inline bool bpf_xdp_sock_is_valid_access(int off, int size,
2317 enum bpf_access_type type,
2318 struct bpf_insn_access_aux *info)
2323 static inline u32 bpf_xdp_sock_convert_ctx_access(enum bpf_access_type type,
2324 const struct bpf_insn *si,
2325 struct bpf_insn *insn_buf,
2326 struct bpf_prog *prog,
2331 #endif /* CONFIG_INET */
2333 enum bpf_text_poke_type {
2338 int bpf_arch_text_poke(void *ip, enum bpf_text_poke_type t,
2339 void *addr1, void *addr2);
2342 bool btf_id_set_contains(const struct btf_id_set *set, u32 id);
2344 #define MAX_BPRINTF_VARARGS 12
2346 int bpf_bprintf_prepare(char *fmt, u32 fmt_size, const u64 *raw_args,
2347 u32 **bin_buf, u32 num_args);
2348 void bpf_bprintf_cleanup(void);
2350 #endif /* _LINUX_BPF_H */