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>
26 struct bpf_verifier_env;
27 struct bpf_verifier_log;
36 struct exception_table_entry;
37 struct seq_operations;
38 struct bpf_iter_aux_info;
39 struct bpf_local_storage;
40 struct bpf_local_storage_map;
44 struct bpf_func_state;
46 extern struct idr btf_idr;
47 extern spinlock_t btf_idr_lock;
48 extern struct kobject *btf_kobj;
50 typedef int (*bpf_iter_init_seq_priv_t)(void *private_data,
51 struct bpf_iter_aux_info *aux);
52 typedef void (*bpf_iter_fini_seq_priv_t)(void *private_data);
53 struct bpf_iter_seq_info {
54 const struct seq_operations *seq_ops;
55 bpf_iter_init_seq_priv_t init_seq_private;
56 bpf_iter_fini_seq_priv_t fini_seq_private;
60 /* map is generic key/value storage optionally accessible by eBPF programs */
62 /* funcs callable from userspace (via syscall) */
63 int (*map_alloc_check)(union bpf_attr *attr);
64 struct bpf_map *(*map_alloc)(union bpf_attr *attr);
65 void (*map_release)(struct bpf_map *map, struct file *map_file);
66 void (*map_free)(struct bpf_map *map);
67 int (*map_get_next_key)(struct bpf_map *map, void *key, void *next_key);
68 void (*map_release_uref)(struct bpf_map *map);
69 void *(*map_lookup_elem_sys_only)(struct bpf_map *map, void *key);
70 int (*map_lookup_batch)(struct bpf_map *map, const union bpf_attr *attr,
71 union bpf_attr __user *uattr);
72 int (*map_lookup_and_delete_batch)(struct bpf_map *map,
73 const union bpf_attr *attr,
74 union bpf_attr __user *uattr);
75 int (*map_update_batch)(struct bpf_map *map, const union bpf_attr *attr,
76 union bpf_attr __user *uattr);
77 int (*map_delete_batch)(struct bpf_map *map, const union bpf_attr *attr,
78 union bpf_attr __user *uattr);
80 /* funcs callable from userspace and from eBPF programs */
81 void *(*map_lookup_elem)(struct bpf_map *map, void *key);
82 int (*map_update_elem)(struct bpf_map *map, void *key, void *value, u64 flags);
83 int (*map_delete_elem)(struct bpf_map *map, void *key);
84 int (*map_push_elem)(struct bpf_map *map, void *value, u64 flags);
85 int (*map_pop_elem)(struct bpf_map *map, void *value);
86 int (*map_peek_elem)(struct bpf_map *map, void *value);
88 /* funcs called by prog_array and perf_event_array map */
89 void *(*map_fd_get_ptr)(struct bpf_map *map, struct file *map_file,
91 void (*map_fd_put_ptr)(void *ptr);
92 int (*map_gen_lookup)(struct bpf_map *map, struct bpf_insn *insn_buf);
93 u32 (*map_fd_sys_lookup_elem)(void *ptr);
94 void (*map_seq_show_elem)(struct bpf_map *map, void *key,
96 int (*map_check_btf)(const struct bpf_map *map,
97 const struct btf *btf,
98 const struct btf_type *key_type,
99 const struct btf_type *value_type);
101 /* Prog poke tracking helpers. */
102 int (*map_poke_track)(struct bpf_map *map, struct bpf_prog_aux *aux);
103 void (*map_poke_untrack)(struct bpf_map *map, struct bpf_prog_aux *aux);
104 void (*map_poke_run)(struct bpf_map *map, u32 key, struct bpf_prog *old,
105 struct bpf_prog *new);
107 /* Direct value access helpers. */
108 int (*map_direct_value_addr)(const struct bpf_map *map,
110 int (*map_direct_value_meta)(const struct bpf_map *map,
112 int (*map_mmap)(struct bpf_map *map, struct vm_area_struct *vma);
113 __poll_t (*map_poll)(struct bpf_map *map, struct file *filp,
114 struct poll_table_struct *pts);
116 /* Functions called by bpf_local_storage maps */
117 int (*map_local_storage_charge)(struct bpf_local_storage_map *smap,
118 void *owner, u32 size);
119 void (*map_local_storage_uncharge)(struct bpf_local_storage_map *smap,
120 void *owner, u32 size);
121 struct bpf_local_storage __rcu ** (*map_owner_storage_ptr)(void *owner);
124 int (*map_redirect)(struct bpf_map *map, u32 ifindex, u64 flags);
126 /* map_meta_equal must be implemented for maps that can be
127 * used as an inner map. It is a runtime check to ensure
128 * an inner map can be inserted to an outer map.
130 * Some properties of the inner map has been used during the
131 * verification time. When inserting an inner map at the runtime,
132 * map_meta_equal has to ensure the inserting map has the same
133 * properties that the verifier has used earlier.
135 bool (*map_meta_equal)(const struct bpf_map *meta0,
136 const struct bpf_map *meta1);
139 int (*map_set_for_each_callback_args)(struct bpf_verifier_env *env,
140 struct bpf_func_state *caller,
141 struct bpf_func_state *callee);
142 int (*map_for_each_callback)(struct bpf_map *map, void *callback_fn,
143 void *callback_ctx, u64 flags);
145 /* BTF name and id of struct allocated by map_alloc */
146 const char * const map_btf_name;
149 /* bpf_iter info used to open a seq_file */
150 const struct bpf_iter_seq_info *iter_seq_info;
154 /* The first two cachelines with read-mostly members of which some
155 * are also accessed in fast-path (e.g. ops, max_entries).
157 const struct bpf_map_ops *ops ____cacheline_aligned;
158 struct bpf_map *inner_map_meta;
159 #ifdef CONFIG_SECURITY
162 enum bpf_map_type map_type;
167 int spin_lock_off; /* >=0 valid offset, <0 error */
171 u32 btf_value_type_id;
173 #ifdef CONFIG_MEMCG_KMEM
174 struct mem_cgroup *memcg;
176 char name[BPF_OBJ_NAME_LEN];
177 u32 btf_vmlinux_value_type_id;
179 bool frozen; /* write-once; write-protected by freeze_mutex */
182 /* The 3rd and 4th cacheline with misc members to avoid false sharing
183 * particularly with refcounting.
185 atomic64_t refcnt ____cacheline_aligned;
187 struct work_struct work;
188 struct mutex freeze_mutex;
189 u64 writecnt; /* writable mmap cnt; protected by freeze_mutex */
192 static inline bool map_value_has_spin_lock(const struct bpf_map *map)
194 return map->spin_lock_off >= 0;
197 static inline void check_and_init_map_lock(struct bpf_map *map, void *dst)
199 if (likely(!map_value_has_spin_lock(map)))
201 *(struct bpf_spin_lock *)(dst + map->spin_lock_off) =
202 (struct bpf_spin_lock){};
205 /* copy everything but bpf_spin_lock */
206 static inline void copy_map_value(struct bpf_map *map, void *dst, void *src)
208 if (unlikely(map_value_has_spin_lock(map))) {
209 u32 off = map->spin_lock_off;
211 memcpy(dst, src, off);
212 memcpy(dst + off + sizeof(struct bpf_spin_lock),
213 src + off + sizeof(struct bpf_spin_lock),
214 map->value_size - off - sizeof(struct bpf_spin_lock));
216 memcpy(dst, src, map->value_size);
219 void copy_map_value_locked(struct bpf_map *map, void *dst, void *src,
221 int bpf_obj_name_cpy(char *dst, const char *src, unsigned int size);
223 struct bpf_offload_dev;
224 struct bpf_offloaded_map;
226 struct bpf_map_dev_ops {
227 int (*map_get_next_key)(struct bpf_offloaded_map *map,
228 void *key, void *next_key);
229 int (*map_lookup_elem)(struct bpf_offloaded_map *map,
230 void *key, void *value);
231 int (*map_update_elem)(struct bpf_offloaded_map *map,
232 void *key, void *value, u64 flags);
233 int (*map_delete_elem)(struct bpf_offloaded_map *map, void *key);
236 struct bpf_offloaded_map {
238 struct net_device *netdev;
239 const struct bpf_map_dev_ops *dev_ops;
241 struct list_head offloads;
244 static inline struct bpf_offloaded_map *map_to_offmap(struct bpf_map *map)
246 return container_of(map, struct bpf_offloaded_map, map);
249 static inline bool bpf_map_offload_neutral(const struct bpf_map *map)
251 return map->map_type == BPF_MAP_TYPE_PERF_EVENT_ARRAY;
254 static inline bool bpf_map_support_seq_show(const struct bpf_map *map)
256 return (map->btf_value_type_id || map->btf_vmlinux_value_type_id) &&
257 map->ops->map_seq_show_elem;
260 int map_check_no_btf(const struct bpf_map *map,
261 const struct btf *btf,
262 const struct btf_type *key_type,
263 const struct btf_type *value_type);
265 bool bpf_map_meta_equal(const struct bpf_map *meta0,
266 const struct bpf_map *meta1);
268 extern const struct bpf_map_ops bpf_map_offload_ops;
270 /* function argument constraints */
272 ARG_DONTCARE = 0, /* unused argument in helper function */
274 /* the following constraints used to prototype
275 * bpf_map_lookup/update/delete_elem() functions
277 ARG_CONST_MAP_PTR, /* const argument used as pointer to bpf_map */
278 ARG_PTR_TO_MAP_KEY, /* pointer to stack used as map key */
279 ARG_PTR_TO_MAP_VALUE, /* pointer to stack used as map value */
280 ARG_PTR_TO_UNINIT_MAP_VALUE, /* pointer to valid memory used to store a map value */
281 ARG_PTR_TO_MAP_VALUE_OR_NULL, /* pointer to stack used as map value or NULL */
283 /* the following constraints used to prototype bpf_memcmp() and other
284 * functions that access data on eBPF program stack
286 ARG_PTR_TO_MEM, /* pointer to valid memory (stack, packet, map value) */
287 ARG_PTR_TO_MEM_OR_NULL, /* pointer to valid memory or NULL */
288 ARG_PTR_TO_UNINIT_MEM, /* pointer to memory does not need to be initialized,
289 * helper function must fill all bytes or clear
290 * them in error case.
293 ARG_CONST_SIZE, /* number of bytes accessed from memory */
294 ARG_CONST_SIZE_OR_ZERO, /* number of bytes accessed from memory or 0 */
296 ARG_PTR_TO_CTX, /* pointer to context */
297 ARG_PTR_TO_CTX_OR_NULL, /* pointer to context or NULL */
298 ARG_ANYTHING, /* any (initialized) argument is ok */
299 ARG_PTR_TO_SPIN_LOCK, /* pointer to bpf_spin_lock */
300 ARG_PTR_TO_SOCK_COMMON, /* pointer to sock_common */
301 ARG_PTR_TO_INT, /* pointer to int */
302 ARG_PTR_TO_LONG, /* pointer to long */
303 ARG_PTR_TO_SOCKET, /* pointer to bpf_sock (fullsock) */
304 ARG_PTR_TO_SOCKET_OR_NULL, /* pointer to bpf_sock (fullsock) or NULL */
305 ARG_PTR_TO_BTF_ID, /* pointer to in-kernel struct */
306 ARG_PTR_TO_ALLOC_MEM, /* pointer to dynamically allocated memory */
307 ARG_PTR_TO_ALLOC_MEM_OR_NULL, /* pointer to dynamically allocated memory or NULL */
308 ARG_CONST_ALLOC_SIZE_OR_ZERO, /* number of allocated bytes requested */
309 ARG_PTR_TO_BTF_ID_SOCK_COMMON, /* pointer to in-kernel sock_common or bpf-mirrored bpf_sock */
310 ARG_PTR_TO_PERCPU_BTF_ID, /* pointer to in-kernel percpu type */
311 ARG_PTR_TO_FUNC, /* pointer to a bpf program function */
312 ARG_PTR_TO_STACK_OR_NULL, /* pointer to stack or NULL */
313 ARG_PTR_TO_CONST_STR, /* pointer to a null terminated read-only string */
317 /* type of values returned from helper functions */
318 enum bpf_return_type {
319 RET_INTEGER, /* function returns integer */
320 RET_VOID, /* function doesn't return anything */
321 RET_PTR_TO_MAP_VALUE, /* returns a pointer to map elem value */
322 RET_PTR_TO_MAP_VALUE_OR_NULL, /* returns a pointer to map elem value or NULL */
323 RET_PTR_TO_SOCKET_OR_NULL, /* returns a pointer to a socket or NULL */
324 RET_PTR_TO_TCP_SOCK_OR_NULL, /* returns a pointer to a tcp_sock or NULL */
325 RET_PTR_TO_SOCK_COMMON_OR_NULL, /* returns a pointer to a sock_common or NULL */
326 RET_PTR_TO_ALLOC_MEM_OR_NULL, /* returns a pointer to dynamically allocated memory or NULL */
327 RET_PTR_TO_BTF_ID_OR_NULL, /* returns a pointer to a btf_id or NULL */
328 RET_PTR_TO_MEM_OR_BTF_ID_OR_NULL, /* returns a pointer to a valid memory or a btf_id or NULL */
329 RET_PTR_TO_MEM_OR_BTF_ID, /* returns a pointer to a valid memory or a btf_id */
330 RET_PTR_TO_BTF_ID, /* returns a pointer to a btf_id */
333 /* eBPF function prototype used by verifier to allow BPF_CALLs from eBPF programs
334 * to in-kernel helper functions and for adjusting imm32 field in BPF_CALL
335 * instructions after verifying
337 struct bpf_func_proto {
338 u64 (*func)(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
341 enum bpf_return_type ret_type;
344 enum bpf_arg_type arg1_type;
345 enum bpf_arg_type arg2_type;
346 enum bpf_arg_type arg3_type;
347 enum bpf_arg_type arg4_type;
348 enum bpf_arg_type arg5_type;
350 enum bpf_arg_type arg_type[5];
362 int *ret_btf_id; /* return value btf_id */
363 bool (*allowed)(const struct bpf_prog *prog);
366 /* bpf_context is intentionally undefined structure. Pointer to bpf_context is
367 * the first argument to eBPF programs.
368 * For socket filters: 'struct bpf_context *' == 'struct sk_buff *'
372 enum bpf_access_type {
377 /* types of values stored in eBPF registers */
378 /* Pointer types represent:
381 * pointer + (u16) var
382 * pointer + (u16) var + imm
383 * if (range > 0) then [ptr, ptr + range - off) is safe to access
384 * if (id > 0) means that some 'var' was added
385 * if (off > 0) means that 'imm' was added
388 NOT_INIT = 0, /* nothing was written into register */
389 SCALAR_VALUE, /* reg doesn't contain a valid pointer */
390 PTR_TO_CTX, /* reg points to bpf_context */
391 CONST_PTR_TO_MAP, /* reg points to struct bpf_map */
392 PTR_TO_MAP_VALUE, /* reg points to map element value */
393 PTR_TO_MAP_VALUE_OR_NULL,/* points to map elem value or NULL */
394 PTR_TO_STACK, /* reg == frame_pointer + offset */
395 PTR_TO_PACKET_META, /* skb->data - meta_len */
396 PTR_TO_PACKET, /* reg points to skb->data */
397 PTR_TO_PACKET_END, /* skb->data + headlen */
398 PTR_TO_FLOW_KEYS, /* reg points to bpf_flow_keys */
399 PTR_TO_SOCKET, /* reg points to struct bpf_sock */
400 PTR_TO_SOCKET_OR_NULL, /* reg points to struct bpf_sock or NULL */
401 PTR_TO_SOCK_COMMON, /* reg points to sock_common */
402 PTR_TO_SOCK_COMMON_OR_NULL, /* reg points to sock_common or NULL */
403 PTR_TO_TCP_SOCK, /* reg points to struct tcp_sock */
404 PTR_TO_TCP_SOCK_OR_NULL, /* reg points to struct tcp_sock or NULL */
405 PTR_TO_TP_BUFFER, /* reg points to a writable raw tp's buffer */
406 PTR_TO_XDP_SOCK, /* reg points to struct xdp_sock */
407 /* PTR_TO_BTF_ID points to a kernel struct that does not need
408 * to be null checked by the BPF program. This does not imply the
409 * pointer is _not_ null and in practice this can easily be a null
410 * pointer when reading pointer chains. The assumption is program
411 * context will handle null pointer dereference typically via fault
412 * handling. The verifier must keep this in mind and can make no
413 * assumptions about null or non-null when doing branch analysis.
414 * Further, when passed into helpers the helpers can not, without
415 * additional context, assume the value is non-null.
418 /* PTR_TO_BTF_ID_OR_NULL points to a kernel struct that has not
419 * been checked for null. Used primarily to inform the verifier
420 * an explicit null check is required for this struct.
422 PTR_TO_BTF_ID_OR_NULL,
423 PTR_TO_MEM, /* reg points to valid memory region */
424 PTR_TO_MEM_OR_NULL, /* reg points to valid memory region or NULL */
425 PTR_TO_RDONLY_BUF, /* reg points to a readonly buffer */
426 PTR_TO_RDONLY_BUF_OR_NULL, /* reg points to a readonly buffer or NULL */
427 PTR_TO_RDWR_BUF, /* reg points to a read/write buffer */
428 PTR_TO_RDWR_BUF_OR_NULL, /* reg points to a read/write buffer or NULL */
429 PTR_TO_PERCPU_BTF_ID, /* reg points to a percpu kernel variable */
430 PTR_TO_FUNC, /* reg points to a bpf program function */
431 PTR_TO_MAP_KEY, /* reg points to a map element key */
435 /* The information passed from prog-specific *_is_valid_access
436 * back to the verifier.
438 struct bpf_insn_access_aux {
439 enum bpf_reg_type reg_type;
447 struct bpf_verifier_log *log; /* for verbose logs */
451 bpf_ctx_record_field_size(struct bpf_insn_access_aux *aux, u32 size)
453 aux->ctx_field_size = size;
456 struct bpf_prog_ops {
457 int (*test_run)(struct bpf_prog *prog, const union bpf_attr *kattr,
458 union bpf_attr __user *uattr);
461 struct bpf_verifier_ops {
462 /* return eBPF function prototype for verification */
463 const struct bpf_func_proto *
464 (*get_func_proto)(enum bpf_func_id func_id,
465 const struct bpf_prog *prog);
467 /* return true if 'size' wide access at offset 'off' within bpf_context
468 * with 'type' (read or write) is allowed
470 bool (*is_valid_access)(int off, int size, enum bpf_access_type type,
471 const struct bpf_prog *prog,
472 struct bpf_insn_access_aux *info);
473 int (*gen_prologue)(struct bpf_insn *insn, bool direct_write,
474 const struct bpf_prog *prog);
475 int (*gen_ld_abs)(const struct bpf_insn *orig,
476 struct bpf_insn *insn_buf);
477 u32 (*convert_ctx_access)(enum bpf_access_type type,
478 const struct bpf_insn *src,
479 struct bpf_insn *dst,
480 struct bpf_prog *prog, u32 *target_size);
481 int (*btf_struct_access)(struct bpf_verifier_log *log,
482 const struct btf *btf,
483 const struct btf_type *t, int off, int size,
484 enum bpf_access_type atype,
486 bool (*check_kfunc_call)(u32 kfunc_btf_id);
489 struct bpf_prog_offload_ops {
490 /* verifier basic callbacks */
491 int (*insn_hook)(struct bpf_verifier_env *env,
492 int insn_idx, int prev_insn_idx);
493 int (*finalize)(struct bpf_verifier_env *env);
494 /* verifier optimization callbacks (called after .finalize) */
495 int (*replace_insn)(struct bpf_verifier_env *env, u32 off,
496 struct bpf_insn *insn);
497 int (*remove_insns)(struct bpf_verifier_env *env, u32 off, u32 cnt);
498 /* program management callbacks */
499 int (*prepare)(struct bpf_prog *prog);
500 int (*translate)(struct bpf_prog *prog);
501 void (*destroy)(struct bpf_prog *prog);
504 struct bpf_prog_offload {
505 struct bpf_prog *prog;
506 struct net_device *netdev;
507 struct bpf_offload_dev *offdev;
509 struct list_head offloads;
516 enum bpf_cgroup_storage_type {
517 BPF_CGROUP_STORAGE_SHARED,
518 BPF_CGROUP_STORAGE_PERCPU,
519 __BPF_CGROUP_STORAGE_MAX
522 #define MAX_BPF_CGROUP_STORAGE_TYPE __BPF_CGROUP_STORAGE_MAX
524 /* The longest tracepoint has 12 args.
525 * See include/trace/bpf_probe.h
527 #define MAX_BPF_FUNC_ARGS 12
529 /* The maximum number of arguments passed through registers
530 * a single function may have.
532 #define MAX_BPF_FUNC_REG_ARGS 5
534 struct btf_func_model {
537 u8 arg_size[MAX_BPF_FUNC_ARGS];
540 /* Restore arguments before returning from trampoline to let original function
541 * continue executing. This flag is used for fentry progs when there are no
544 #define BPF_TRAMP_F_RESTORE_REGS BIT(0)
545 /* Call original function after fentry progs, but before fexit progs.
546 * Makes sense for fentry/fexit, normal calls and indirect calls.
548 #define BPF_TRAMP_F_CALL_ORIG BIT(1)
549 /* Skip current frame and return to parent. Makes sense for fentry/fexit
550 * programs only. Should not be used with normal calls and indirect calls.
552 #define BPF_TRAMP_F_SKIP_FRAME BIT(2)
554 /* Each call __bpf_prog_enter + call bpf_func + call __bpf_prog_exit is ~50
555 * bytes on x86. Pick a number to fit into BPF_IMAGE_SIZE / 2
557 #define BPF_MAX_TRAMP_PROGS 38
559 struct bpf_tramp_progs {
560 struct bpf_prog *progs[BPF_MAX_TRAMP_PROGS];
564 /* Different use cases for BPF trampoline:
565 * 1. replace nop at the function entry (kprobe equivalent)
566 * flags = BPF_TRAMP_F_RESTORE_REGS
567 * fentry = a set of programs to run before returning from trampoline
569 * 2. replace nop at the function entry (kprobe + kretprobe equivalent)
570 * flags = BPF_TRAMP_F_CALL_ORIG | BPF_TRAMP_F_SKIP_FRAME
571 * orig_call = fentry_ip + MCOUNT_INSN_SIZE
572 * fentry = a set of program to run before calling original function
573 * fexit = a set of program to run after original function
575 * 3. replace direct call instruction anywhere in the function body
576 * or assign a function pointer for indirect call (like tcp_congestion_ops->cong_avoid)
578 * fentry = a set of programs to run before returning from trampoline
579 * With flags = BPF_TRAMP_F_CALL_ORIG
580 * orig_call = original callback addr or direct function addr
581 * fentry = a set of program to run before calling original function
582 * fexit = a set of program to run after original function
584 struct bpf_tramp_image;
585 int arch_prepare_bpf_trampoline(struct bpf_tramp_image *tr, void *image, void *image_end,
586 const struct btf_func_model *m, u32 flags,
587 struct bpf_tramp_progs *tprogs,
589 /* these two functions are called from generated trampoline */
590 u64 notrace __bpf_prog_enter(struct bpf_prog *prog);
591 void notrace __bpf_prog_exit(struct bpf_prog *prog, u64 start);
592 u64 notrace __bpf_prog_enter_sleepable(struct bpf_prog *prog);
593 void notrace __bpf_prog_exit_sleepable(struct bpf_prog *prog, u64 start);
594 void notrace __bpf_tramp_enter(struct bpf_tramp_image *tr);
595 void notrace __bpf_tramp_exit(struct bpf_tramp_image *tr);
600 char name[KSYM_NAME_LEN];
601 struct list_head lnode;
602 struct latch_tree_node tnode;
606 enum bpf_tramp_prog_type {
609 BPF_TRAMP_MODIFY_RETURN,
611 BPF_TRAMP_REPLACE, /* more than MAX */
614 struct bpf_tramp_image {
616 struct bpf_ksym ksym;
617 struct percpu_ref pcref;
622 struct work_struct work;
626 struct bpf_trampoline {
627 /* hlist for trampoline_table */
628 struct hlist_node hlist;
629 /* serializes access to fields of this trampoline */
634 struct btf_func_model model;
638 /* if !NULL this is BPF_PROG_TYPE_EXT program that extends another BPF
639 * program by replacing one of its functions. func.addr is the address
640 * of the function it replaced.
642 struct bpf_prog *extension_prog;
643 /* list of BPF programs using this trampoline */
644 struct hlist_head progs_hlist[BPF_TRAMP_MAX];
645 /* Number of attached programs. A counter per kind. */
646 int progs_cnt[BPF_TRAMP_MAX];
647 /* Executable image of trampoline */
648 struct bpf_tramp_image *cur_image;
653 struct bpf_attach_target_info {
654 struct btf_func_model fmodel;
656 const char *tgt_name;
657 const struct btf_type *tgt_type;
660 #define BPF_DISPATCHER_MAX 48 /* Fits in 2048B */
662 struct bpf_dispatcher_prog {
663 struct bpf_prog *prog;
667 struct bpf_dispatcher {
668 /* dispatcher mutex */
671 struct bpf_dispatcher_prog progs[BPF_DISPATCHER_MAX];
675 struct bpf_ksym ksym;
678 static __always_inline __nocfi unsigned int bpf_dispatcher_nop_func(
680 const struct bpf_insn *insnsi,
681 unsigned int (*bpf_func)(const void *,
682 const struct bpf_insn *))
684 return bpf_func(ctx, insnsi);
686 #ifdef CONFIG_BPF_JIT
687 int bpf_trampoline_link_prog(struct bpf_prog *prog, struct bpf_trampoline *tr);
688 int bpf_trampoline_unlink_prog(struct bpf_prog *prog, struct bpf_trampoline *tr);
689 struct bpf_trampoline *bpf_trampoline_get(u64 key,
690 struct bpf_attach_target_info *tgt_info);
691 void bpf_trampoline_put(struct bpf_trampoline *tr);
692 #define BPF_DISPATCHER_INIT(_name) { \
693 .mutex = __MUTEX_INITIALIZER(_name.mutex), \
694 .func = &_name##_func, \
701 .lnode = LIST_HEAD_INIT(_name.ksym.lnode), \
705 #define DEFINE_BPF_DISPATCHER(name) \
706 noinline __nocfi unsigned int bpf_dispatcher_##name##_func( \
708 const struct bpf_insn *insnsi, \
709 unsigned int (*bpf_func)(const void *, \
710 const struct bpf_insn *)) \
712 return bpf_func(ctx, insnsi); \
714 EXPORT_SYMBOL(bpf_dispatcher_##name##_func); \
715 struct bpf_dispatcher bpf_dispatcher_##name = \
716 BPF_DISPATCHER_INIT(bpf_dispatcher_##name);
717 #define DECLARE_BPF_DISPATCHER(name) \
718 unsigned int bpf_dispatcher_##name##_func( \
720 const struct bpf_insn *insnsi, \
721 unsigned int (*bpf_func)(const void *, \
722 const struct bpf_insn *)); \
723 extern struct bpf_dispatcher bpf_dispatcher_##name;
724 #define BPF_DISPATCHER_FUNC(name) bpf_dispatcher_##name##_func
725 #define BPF_DISPATCHER_PTR(name) (&bpf_dispatcher_##name)
726 void bpf_dispatcher_change_prog(struct bpf_dispatcher *d, struct bpf_prog *from,
727 struct bpf_prog *to);
728 /* Called only from JIT-enabled code, so there's no need for stubs. */
729 void *bpf_jit_alloc_exec_page(void);
730 void bpf_image_ksym_add(void *data, struct bpf_ksym *ksym);
731 void bpf_image_ksym_del(struct bpf_ksym *ksym);
732 void bpf_ksym_add(struct bpf_ksym *ksym);
733 void bpf_ksym_del(struct bpf_ksym *ksym);
734 int bpf_jit_charge_modmem(u32 pages);
735 void bpf_jit_uncharge_modmem(u32 pages);
737 static inline int bpf_trampoline_link_prog(struct bpf_prog *prog,
738 struct bpf_trampoline *tr)
742 static inline int bpf_trampoline_unlink_prog(struct bpf_prog *prog,
743 struct bpf_trampoline *tr)
747 static inline struct bpf_trampoline *bpf_trampoline_get(u64 key,
748 struct bpf_attach_target_info *tgt_info)
750 return ERR_PTR(-EOPNOTSUPP);
752 static inline void bpf_trampoline_put(struct bpf_trampoline *tr) {}
753 #define DEFINE_BPF_DISPATCHER(name)
754 #define DECLARE_BPF_DISPATCHER(name)
755 #define BPF_DISPATCHER_FUNC(name) bpf_dispatcher_nop_func
756 #define BPF_DISPATCHER_PTR(name) NULL
757 static inline void bpf_dispatcher_change_prog(struct bpf_dispatcher *d,
758 struct bpf_prog *from,
759 struct bpf_prog *to) {}
760 static inline bool is_bpf_image_address(unsigned long address)
766 struct bpf_func_info_aux {
771 enum bpf_jit_poke_reason {
772 BPF_POKE_REASON_TAIL_CALL,
775 /* Descriptor of pokes pointing /into/ the JITed image. */
776 struct bpf_jit_poke_descriptor {
777 void *tailcall_target;
778 void *tailcall_bypass;
787 bool tailcall_target_stable;
793 /* reg_type info for ctx arguments */
794 struct bpf_ctx_arg_aux {
796 enum bpf_reg_type reg_type;
800 struct btf_mod_pair {
802 struct module *module;
805 struct bpf_kfunc_desc_tab;
807 struct bpf_prog_aux {
816 u32 func_cnt; /* used by non-func prog as the number of func progs */
817 u32 func_idx; /* 0 for non-func prog, the index in func array for func prog */
818 u32 attach_btf_id; /* in-kernel BTF type id to attach to */
819 u32 ctx_arg_info_size;
820 u32 max_rdonly_access;
822 struct btf *attach_btf;
823 const struct bpf_ctx_arg_aux *ctx_arg_info;
824 struct mutex dst_mutex; /* protects dst_* pointers below, *after* prog becomes visible */
825 struct bpf_prog *dst_prog;
826 struct bpf_trampoline *dst_trampoline;
827 enum bpf_prog_type saved_dst_prog_type;
828 enum bpf_attach_type saved_dst_attach_type;
829 bool verifier_zext; /* Zero extensions has been inserted by verifier. */
830 bool offload_requested;
831 bool attach_btf_trace; /* true if attaching to BTF-enabled raw tp */
832 bool func_proto_unreliable;
834 bool tail_call_reachable;
835 struct hlist_node tramp_hlist;
836 /* BTF_KIND_FUNC_PROTO for valid attach_btf_id */
837 const struct btf_type *attach_func_proto;
838 /* function name for valid attach_btf_id */
839 const char *attach_func_name;
840 struct bpf_prog **func;
841 void *jit_data; /* JIT specific data. arch dependent */
842 struct bpf_jit_poke_descriptor *poke_tab;
843 struct bpf_kfunc_desc_tab *kfunc_tab;
845 struct bpf_ksym ksym;
846 const struct bpf_prog_ops *ops;
847 struct bpf_map **used_maps;
848 struct mutex used_maps_mutex; /* mutex for used_maps and used_map_cnt */
849 struct btf_mod_pair *used_btfs;
850 struct bpf_prog *prog;
851 struct user_struct *user;
852 u64 load_time; /* ns since boottime */
853 struct bpf_map *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE];
854 char name[BPF_OBJ_NAME_LEN];
855 #ifdef CONFIG_SECURITY
858 struct bpf_prog_offload *offload;
860 struct bpf_func_info *func_info;
861 struct bpf_func_info_aux *func_info_aux;
862 /* bpf_line_info loaded from userspace. linfo->insn_off
863 * has the xlated insn offset.
864 * Both the main and sub prog share the same linfo.
865 * The subprog can access its first linfo by
866 * using the linfo_idx.
868 struct bpf_line_info *linfo;
869 /* jited_linfo is the jited addr of the linfo. It has a
870 * one to one mapping to linfo:
871 * jited_linfo[i] is the jited addr for the linfo[i]->insn_off.
872 * Both the main and sub prog share the same jited_linfo.
873 * The subprog can access its first jited_linfo by
874 * using the linfo_idx.
879 /* subprog can use linfo_idx to access its first linfo and
881 * main prog always has linfo_idx == 0
885 struct exception_table_entry *extable;
887 struct work_struct work;
892 struct bpf_array_aux {
893 /* 'Ownership' of prog array is claimed by the first program that
894 * is going to use this map or by the first program which FD is
895 * stored in the map to make sure that all callers and callees have
896 * the same prog type and JITed flag.
898 enum bpf_prog_type type;
900 /* Programs with direct jumps into programs part of this array. */
901 struct list_head poke_progs;
903 struct mutex poke_mutex;
904 struct work_struct work;
910 enum bpf_link_type type;
911 const struct bpf_link_ops *ops;
912 struct bpf_prog *prog;
913 struct work_struct work;
916 struct bpf_link_ops {
917 void (*release)(struct bpf_link *link);
918 void (*dealloc)(struct bpf_link *link);
919 int (*detach)(struct bpf_link *link);
920 int (*update_prog)(struct bpf_link *link, struct bpf_prog *new_prog,
921 struct bpf_prog *old_prog);
922 void (*show_fdinfo)(const struct bpf_link *link, struct seq_file *seq);
923 int (*fill_link_info)(const struct bpf_link *link,
924 struct bpf_link_info *info);
927 struct bpf_link_primer {
928 struct bpf_link *link;
934 struct bpf_struct_ops_value;
937 #define BPF_STRUCT_OPS_MAX_NR_MEMBERS 64
938 struct bpf_struct_ops {
939 const struct bpf_verifier_ops *verifier_ops;
940 int (*init)(struct btf *btf);
941 int (*check_member)(const struct btf_type *t,
942 const struct btf_member *member);
943 int (*init_member)(const struct btf_type *t,
944 const struct btf_member *member,
945 void *kdata, const void *udata);
946 int (*reg)(void *kdata);
947 void (*unreg)(void *kdata);
948 const struct btf_type *type;
949 const struct btf_type *value_type;
951 struct btf_func_model func_models[BPF_STRUCT_OPS_MAX_NR_MEMBERS];
956 #if defined(CONFIG_BPF_JIT) && defined(CONFIG_BPF_SYSCALL)
957 #define BPF_MODULE_OWNER ((void *)((0xeB9FUL << 2) + POISON_POINTER_DELTA))
958 const struct bpf_struct_ops *bpf_struct_ops_find(u32 type_id);
959 void bpf_struct_ops_init(struct btf *btf, struct bpf_verifier_log *log);
960 bool bpf_struct_ops_get(const void *kdata);
961 void bpf_struct_ops_put(const void *kdata);
962 int bpf_struct_ops_map_sys_lookup_elem(struct bpf_map *map, void *key,
964 static inline bool bpf_try_module_get(const void *data, struct module *owner)
966 if (owner == BPF_MODULE_OWNER)
967 return bpf_struct_ops_get(data);
969 return try_module_get(owner);
971 static inline void bpf_module_put(const void *data, struct module *owner)
973 if (owner == BPF_MODULE_OWNER)
974 bpf_struct_ops_put(data);
979 static inline const struct bpf_struct_ops *bpf_struct_ops_find(u32 type_id)
983 static inline void bpf_struct_ops_init(struct btf *btf,
984 struct bpf_verifier_log *log)
987 static inline bool bpf_try_module_get(const void *data, struct module *owner)
989 return try_module_get(owner);
991 static inline void bpf_module_put(const void *data, struct module *owner)
995 static inline int bpf_struct_ops_map_sys_lookup_elem(struct bpf_map *map,
1007 struct bpf_array_aux *aux;
1009 char value[0] __aligned(8);
1010 void *ptrs[0] __aligned(8);
1011 void __percpu *pptrs[0] __aligned(8);
1015 #define BPF_COMPLEXITY_LIMIT_INSNS 1000000 /* yes. 1M insns */
1016 #define MAX_TAIL_CALL_CNT 32
1018 #define BPF_F_ACCESS_MASK (BPF_F_RDONLY | \
1019 BPF_F_RDONLY_PROG | \
1023 #define BPF_MAP_CAN_READ BIT(0)
1024 #define BPF_MAP_CAN_WRITE BIT(1)
1026 static inline u32 bpf_map_flags_to_cap(struct bpf_map *map)
1028 u32 access_flags = map->map_flags & (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG);
1030 /* Combination of BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG is
1033 if (access_flags & BPF_F_RDONLY_PROG)
1034 return BPF_MAP_CAN_READ;
1035 else if (access_flags & BPF_F_WRONLY_PROG)
1036 return BPF_MAP_CAN_WRITE;
1038 return BPF_MAP_CAN_READ | BPF_MAP_CAN_WRITE;
1041 static inline bool bpf_map_flags_access_ok(u32 access_flags)
1043 return (access_flags & (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG)) !=
1044 (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG);
1047 struct bpf_event_entry {
1048 struct perf_event *event;
1049 struct file *perf_file;
1050 struct file *map_file;
1051 struct rcu_head rcu;
1054 bool bpf_prog_array_compatible(struct bpf_array *array, const struct bpf_prog *fp);
1055 int bpf_prog_calc_tag(struct bpf_prog *fp);
1057 const struct bpf_func_proto *bpf_get_trace_printk_proto(void);
1059 typedef unsigned long (*bpf_ctx_copy_t)(void *dst, const void *src,
1060 unsigned long off, unsigned long len);
1061 typedef u32 (*bpf_convert_ctx_access_t)(enum bpf_access_type type,
1062 const struct bpf_insn *src,
1063 struct bpf_insn *dst,
1064 struct bpf_prog *prog,
1067 u64 bpf_event_output(struct bpf_map *map, u64 flags, void *meta, u64 meta_size,
1068 void *ctx, u64 ctx_size, bpf_ctx_copy_t ctx_copy);
1070 /* an array of programs to be executed under rcu_lock.
1073 * ret = BPF_PROG_RUN_ARRAY(&bpf_prog_array, ctx, BPF_PROG_RUN);
1075 * the structure returned by bpf_prog_array_alloc() should be populated
1076 * with program pointers and the last pointer must be NULL.
1077 * The user has to keep refcnt on the program and make sure the program
1078 * is removed from the array before bpf_prog_put().
1079 * The 'struct bpf_prog_array *' should only be replaced with xchg()
1080 * since other cpus are walking the array of pointers in parallel.
1082 struct bpf_prog_array_item {
1083 struct bpf_prog *prog;
1084 struct bpf_cgroup_storage *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE];
1087 struct bpf_prog_array {
1088 struct rcu_head rcu;
1089 struct bpf_prog_array_item items[];
1092 struct bpf_prog_array *bpf_prog_array_alloc(u32 prog_cnt, gfp_t flags);
1093 void bpf_prog_array_free(struct bpf_prog_array *progs);
1094 int bpf_prog_array_length(struct bpf_prog_array *progs);
1095 bool bpf_prog_array_is_empty(struct bpf_prog_array *array);
1096 int bpf_prog_array_copy_to_user(struct bpf_prog_array *progs,
1097 __u32 __user *prog_ids, u32 cnt);
1099 void bpf_prog_array_delete_safe(struct bpf_prog_array *progs,
1100 struct bpf_prog *old_prog);
1101 int bpf_prog_array_delete_safe_at(struct bpf_prog_array *array, int index);
1102 int bpf_prog_array_update_at(struct bpf_prog_array *array, int index,
1103 struct bpf_prog *prog);
1104 int bpf_prog_array_copy_info(struct bpf_prog_array *array,
1105 u32 *prog_ids, u32 request_cnt,
1107 int bpf_prog_array_copy(struct bpf_prog_array *old_array,
1108 struct bpf_prog *exclude_prog,
1109 struct bpf_prog *include_prog,
1110 struct bpf_prog_array **new_array);
1112 /* BPF program asks to bypass CAP_NET_BIND_SERVICE in bind. */
1113 #define BPF_RET_BIND_NO_CAP_NET_BIND_SERVICE (1 << 0)
1114 /* BPF program asks to set CN on the packet. */
1115 #define BPF_RET_SET_CN (1 << 0)
1117 /* For BPF_PROG_RUN_ARRAY_FLAGS and __BPF_PROG_RUN_ARRAY,
1118 * if bpf_cgroup_storage_set() failed, the rest of programs
1119 * will not execute. This should be a really rare scenario
1120 * as it requires BPF_CGROUP_STORAGE_NEST_MAX number of
1121 * preemptions all between bpf_cgroup_storage_set() and
1122 * bpf_cgroup_storage_unset() on the same cpu.
1124 #define BPF_PROG_RUN_ARRAY_FLAGS(array, ctx, func, ret_flags) \
1126 struct bpf_prog_array_item *_item; \
1127 struct bpf_prog *_prog; \
1128 struct bpf_prog_array *_array; \
1131 migrate_disable(); \
1133 _array = rcu_dereference(array); \
1134 _item = &_array->items[0]; \
1135 while ((_prog = READ_ONCE(_item->prog))) { \
1136 if (unlikely(bpf_cgroup_storage_set(_item->cgroup_storage))) \
1138 func_ret = func(_prog, ctx); \
1139 _ret &= (func_ret & 1); \
1140 *(ret_flags) |= (func_ret >> 1); \
1141 bpf_cgroup_storage_unset(); \
1144 rcu_read_unlock(); \
1149 #define __BPF_PROG_RUN_ARRAY(array, ctx, func, check_non_null, set_cg_storage) \
1151 struct bpf_prog_array_item *_item; \
1152 struct bpf_prog *_prog; \
1153 struct bpf_prog_array *_array; \
1155 migrate_disable(); \
1157 _array = rcu_dereference(array); \
1158 if (unlikely(check_non_null && !_array))\
1160 _item = &_array->items[0]; \
1161 while ((_prog = READ_ONCE(_item->prog))) { \
1162 if (!set_cg_storage) { \
1163 _ret &= func(_prog, ctx); \
1165 if (unlikely(bpf_cgroup_storage_set(_item->cgroup_storage))) \
1167 _ret &= func(_prog, ctx); \
1168 bpf_cgroup_storage_unset(); \
1173 rcu_read_unlock(); \
1178 /* To be used by __cgroup_bpf_run_filter_skb for EGRESS BPF progs
1179 * so BPF programs can request cwr for TCP packets.
1181 * Current cgroup skb programs can only return 0 or 1 (0 to drop the
1182 * packet. This macro changes the behavior so the low order bit
1183 * indicates whether the packet should be dropped (0) or not (1)
1184 * and the next bit is a congestion notification bit. This could be
1185 * used by TCP to call tcp_enter_cwr()
1187 * Hence, new allowed return values of CGROUP EGRESS BPF programs are:
1190 * 2: drop packet and cn
1191 * 3: keep packet and cn
1193 * This macro then converts it to one of the NET_XMIT or an error
1194 * code that is then interpreted as drop packet (and no cn):
1195 * 0: NET_XMIT_SUCCESS skb should be transmitted
1196 * 1: NET_XMIT_DROP skb should be dropped and cn
1197 * 2: NET_XMIT_CN skb should be transmitted and cn
1198 * 3: -EPERM skb should be dropped
1200 #define BPF_PROG_CGROUP_INET_EGRESS_RUN_ARRAY(array, ctx, func) \
1205 _ret = BPF_PROG_RUN_ARRAY_FLAGS(array, ctx, func, &_flags); \
1206 _cn = _flags & BPF_RET_SET_CN; \
1208 _ret = (_cn ? NET_XMIT_CN : NET_XMIT_SUCCESS); \
1210 _ret = (_cn ? NET_XMIT_DROP : -EPERM); \
1214 #define BPF_PROG_RUN_ARRAY(array, ctx, func) \
1215 __BPF_PROG_RUN_ARRAY(array, ctx, func, false, true)
1217 #define BPF_PROG_RUN_ARRAY_CHECK(array, ctx, func) \
1218 __BPF_PROG_RUN_ARRAY(array, ctx, func, true, false)
1220 #ifdef CONFIG_BPF_SYSCALL
1221 DECLARE_PER_CPU(int, bpf_prog_active);
1222 extern struct mutex bpf_stats_enabled_mutex;
1225 * Block execution of BPF programs attached to instrumentation (perf,
1226 * kprobes, tracepoints) to prevent deadlocks on map operations as any of
1227 * these events can happen inside a region which holds a map bucket lock
1228 * and can deadlock on it.
1230 * Use the preemption safe inc/dec variants on RT because migrate disable
1231 * is preemptible on RT and preemption in the middle of the RMW operation
1232 * might lead to inconsistent state. Use the raw variants for non RT
1233 * kernels as migrate_disable() maps to preempt_disable() so the slightly
1234 * more expensive save operation can be avoided.
1236 static inline void bpf_disable_instrumentation(void)
1239 if (IS_ENABLED(CONFIG_PREEMPT_RT))
1240 this_cpu_inc(bpf_prog_active);
1242 __this_cpu_inc(bpf_prog_active);
1245 static inline void bpf_enable_instrumentation(void)
1247 if (IS_ENABLED(CONFIG_PREEMPT_RT))
1248 this_cpu_dec(bpf_prog_active);
1250 __this_cpu_dec(bpf_prog_active);
1254 extern const struct file_operations bpf_map_fops;
1255 extern const struct file_operations bpf_prog_fops;
1256 extern const struct file_operations bpf_iter_fops;
1258 #define BPF_PROG_TYPE(_id, _name, prog_ctx_type, kern_ctx_type) \
1259 extern const struct bpf_prog_ops _name ## _prog_ops; \
1260 extern const struct bpf_verifier_ops _name ## _verifier_ops;
1261 #define BPF_MAP_TYPE(_id, _ops) \
1262 extern const struct bpf_map_ops _ops;
1263 #define BPF_LINK_TYPE(_id, _name)
1264 #include <linux/bpf_types.h>
1265 #undef BPF_PROG_TYPE
1267 #undef BPF_LINK_TYPE
1269 extern const struct bpf_prog_ops bpf_offload_prog_ops;
1270 extern const struct bpf_verifier_ops tc_cls_act_analyzer_ops;
1271 extern const struct bpf_verifier_ops xdp_analyzer_ops;
1273 struct bpf_prog *bpf_prog_get(u32 ufd);
1274 struct bpf_prog *bpf_prog_get_type_dev(u32 ufd, enum bpf_prog_type type,
1276 void bpf_prog_add(struct bpf_prog *prog, int i);
1277 void bpf_prog_sub(struct bpf_prog *prog, int i);
1278 void bpf_prog_inc(struct bpf_prog *prog);
1279 struct bpf_prog * __must_check bpf_prog_inc_not_zero(struct bpf_prog *prog);
1280 void bpf_prog_put(struct bpf_prog *prog);
1282 void bpf_prog_free_id(struct bpf_prog *prog, bool do_idr_lock);
1283 void bpf_map_free_id(struct bpf_map *map, bool do_idr_lock);
1285 struct bpf_map *bpf_map_get(u32 ufd);
1286 struct bpf_map *bpf_map_get_with_uref(u32 ufd);
1287 struct bpf_map *__bpf_map_get(struct fd f);
1288 void bpf_map_inc(struct bpf_map *map);
1289 void bpf_map_inc_with_uref(struct bpf_map *map);
1290 struct bpf_map * __must_check bpf_map_inc_not_zero(struct bpf_map *map);
1291 void bpf_map_put_with_uref(struct bpf_map *map);
1292 void bpf_map_put(struct bpf_map *map);
1293 void *bpf_map_area_alloc(u64 size, int numa_node);
1294 void *bpf_map_area_mmapable_alloc(u64 size, int numa_node);
1295 void bpf_map_area_free(void *base);
1296 void bpf_map_init_from_attr(struct bpf_map *map, union bpf_attr *attr);
1297 int generic_map_lookup_batch(struct bpf_map *map,
1298 const union bpf_attr *attr,
1299 union bpf_attr __user *uattr);
1300 int generic_map_update_batch(struct bpf_map *map,
1301 const union bpf_attr *attr,
1302 union bpf_attr __user *uattr);
1303 int generic_map_delete_batch(struct bpf_map *map,
1304 const union bpf_attr *attr,
1305 union bpf_attr __user *uattr);
1306 struct bpf_map *bpf_map_get_curr_or_next(u32 *id);
1307 struct bpf_prog *bpf_prog_get_curr_or_next(u32 *id);
1309 #ifdef CONFIG_MEMCG_KMEM
1310 void *bpf_map_kmalloc_node(const struct bpf_map *map, size_t size, gfp_t flags,
1312 void *bpf_map_kzalloc(const struct bpf_map *map, size_t size, gfp_t flags);
1313 void __percpu *bpf_map_alloc_percpu(const struct bpf_map *map, size_t size,
1314 size_t align, gfp_t flags);
1316 static inline void *
1317 bpf_map_kmalloc_node(const struct bpf_map *map, size_t size, gfp_t flags,
1320 return kmalloc_node(size, flags, node);
1323 static inline void *
1324 bpf_map_kzalloc(const struct bpf_map *map, size_t size, gfp_t flags)
1326 return kzalloc(size, flags);
1329 static inline void __percpu *
1330 bpf_map_alloc_percpu(const struct bpf_map *map, size_t size, size_t align,
1333 return __alloc_percpu_gfp(size, align, flags);
1337 extern int sysctl_unprivileged_bpf_disabled;
1339 static inline bool bpf_allow_ptr_leaks(void)
1341 return perfmon_capable();
1344 static inline bool bpf_allow_uninit_stack(void)
1346 return perfmon_capable();
1349 static inline bool bpf_allow_ptr_to_map_access(void)
1351 return perfmon_capable();
1354 static inline bool bpf_bypass_spec_v1(void)
1356 return perfmon_capable();
1359 static inline bool bpf_bypass_spec_v4(void)
1361 return perfmon_capable();
1364 int bpf_map_new_fd(struct bpf_map *map, int flags);
1365 int bpf_prog_new_fd(struct bpf_prog *prog);
1367 void bpf_link_init(struct bpf_link *link, enum bpf_link_type type,
1368 const struct bpf_link_ops *ops, struct bpf_prog *prog);
1369 int bpf_link_prime(struct bpf_link *link, struct bpf_link_primer *primer);
1370 int bpf_link_settle(struct bpf_link_primer *primer);
1371 void bpf_link_cleanup(struct bpf_link_primer *primer);
1372 void bpf_link_inc(struct bpf_link *link);
1373 void bpf_link_put(struct bpf_link *link);
1374 int bpf_link_new_fd(struct bpf_link *link);
1375 struct file *bpf_link_new_file(struct bpf_link *link, int *reserved_fd);
1376 struct bpf_link *bpf_link_get_from_fd(u32 ufd);
1378 int bpf_obj_pin_user(u32 ufd, const char __user *pathname);
1379 int bpf_obj_get_user(const char __user *pathname, int flags);
1381 #define BPF_ITER_FUNC_PREFIX "bpf_iter_"
1382 #define DEFINE_BPF_ITER_FUNC(target, args...) \
1383 extern int bpf_iter_ ## target(args); \
1384 int __init bpf_iter_ ## target(args) { return 0; }
1386 struct bpf_iter_aux_info {
1387 struct bpf_map *map;
1390 typedef int (*bpf_iter_attach_target_t)(struct bpf_prog *prog,
1391 union bpf_iter_link_info *linfo,
1392 struct bpf_iter_aux_info *aux);
1393 typedef void (*bpf_iter_detach_target_t)(struct bpf_iter_aux_info *aux);
1394 typedef void (*bpf_iter_show_fdinfo_t) (const struct bpf_iter_aux_info *aux,
1395 struct seq_file *seq);
1396 typedef int (*bpf_iter_fill_link_info_t)(const struct bpf_iter_aux_info *aux,
1397 struct bpf_link_info *info);
1399 enum bpf_iter_feature {
1400 BPF_ITER_RESCHED = BIT(0),
1403 #define BPF_ITER_CTX_ARG_MAX 2
1404 struct bpf_iter_reg {
1406 bpf_iter_attach_target_t attach_target;
1407 bpf_iter_detach_target_t detach_target;
1408 bpf_iter_show_fdinfo_t show_fdinfo;
1409 bpf_iter_fill_link_info_t fill_link_info;
1410 u32 ctx_arg_info_size;
1412 struct bpf_ctx_arg_aux ctx_arg_info[BPF_ITER_CTX_ARG_MAX];
1413 const struct bpf_iter_seq_info *seq_info;
1416 struct bpf_iter_meta {
1417 __bpf_md_ptr(struct seq_file *, seq);
1422 struct bpf_iter__bpf_map_elem {
1423 __bpf_md_ptr(struct bpf_iter_meta *, meta);
1424 __bpf_md_ptr(struct bpf_map *, map);
1425 __bpf_md_ptr(void *, key);
1426 __bpf_md_ptr(void *, value);
1429 int bpf_iter_reg_target(const struct bpf_iter_reg *reg_info);
1430 void bpf_iter_unreg_target(const struct bpf_iter_reg *reg_info);
1431 bool bpf_iter_prog_supported(struct bpf_prog *prog);
1432 int bpf_iter_link_attach(const union bpf_attr *attr, struct bpf_prog *prog);
1433 int bpf_iter_new_fd(struct bpf_link *link);
1434 bool bpf_link_is_iter(struct bpf_link *link);
1435 struct bpf_prog *bpf_iter_get_info(struct bpf_iter_meta *meta, bool in_stop);
1436 int bpf_iter_run_prog(struct bpf_prog *prog, void *ctx);
1437 void bpf_iter_map_show_fdinfo(const struct bpf_iter_aux_info *aux,
1438 struct seq_file *seq);
1439 int bpf_iter_map_fill_link_info(const struct bpf_iter_aux_info *aux,
1440 struct bpf_link_info *info);
1442 int map_set_for_each_callback_args(struct bpf_verifier_env *env,
1443 struct bpf_func_state *caller,
1444 struct bpf_func_state *callee);
1446 int bpf_percpu_hash_copy(struct bpf_map *map, void *key, void *value);
1447 int bpf_percpu_array_copy(struct bpf_map *map, void *key, void *value);
1448 int bpf_percpu_hash_update(struct bpf_map *map, void *key, void *value,
1450 int bpf_percpu_array_update(struct bpf_map *map, void *key, void *value,
1453 int bpf_stackmap_copy(struct bpf_map *map, void *key, void *value);
1455 int bpf_fd_array_map_update_elem(struct bpf_map *map, struct file *map_file,
1456 void *key, void *value, u64 map_flags);
1457 int bpf_fd_array_map_lookup_elem(struct bpf_map *map, void *key, u32 *value);
1458 int bpf_fd_htab_map_update_elem(struct bpf_map *map, struct file *map_file,
1459 void *key, void *value, u64 map_flags);
1460 int bpf_fd_htab_map_lookup_elem(struct bpf_map *map, void *key, u32 *value);
1462 int bpf_get_file_flag(int flags);
1463 int bpf_check_uarg_tail_zero(void __user *uaddr, size_t expected_size,
1464 size_t actual_size);
1466 /* memcpy that is used with 8-byte aligned pointers, power-of-8 size and
1467 * forced to use 'long' read/writes to try to atomically copy long counters.
1468 * Best-effort only. No barriers here, since it _will_ race with concurrent
1469 * updates from BPF programs. Called from bpf syscall and mostly used with
1470 * size 8 or 16 bytes, so ask compiler to inline it.
1472 static inline void bpf_long_memcpy(void *dst, const void *src, u32 size)
1474 const long *lsrc = src;
1477 size /= sizeof(long);
1482 /* verify correctness of eBPF program */
1483 int bpf_check(struct bpf_prog **fp, union bpf_attr *attr,
1484 union bpf_attr __user *uattr);
1486 #ifndef CONFIG_BPF_JIT_ALWAYS_ON
1487 void bpf_patch_call_args(struct bpf_insn *insn, u32 stack_depth);
1490 struct btf *bpf_get_btf_vmlinux(void);
1495 struct bpf_dtab_netdev;
1496 struct bpf_cpu_map_entry;
1498 void __dev_flush(void);
1499 int dev_xdp_enqueue(struct net_device *dev, struct xdp_buff *xdp,
1500 struct net_device *dev_rx);
1501 int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp,
1502 struct net_device *dev_rx);
1503 int dev_map_generic_redirect(struct bpf_dtab_netdev *dst, struct sk_buff *skb,
1504 struct bpf_prog *xdp_prog);
1505 bool dev_map_can_have_prog(struct bpf_map *map);
1507 void __cpu_map_flush(void);
1508 int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu, struct xdp_buff *xdp,
1509 struct net_device *dev_rx);
1510 bool cpu_map_prog_allowed(struct bpf_map *map);
1512 /* Return map's numa specified by userspace */
1513 static inline int bpf_map_attr_numa_node(const union bpf_attr *attr)
1515 return (attr->map_flags & BPF_F_NUMA_NODE) ?
1516 attr->numa_node : NUMA_NO_NODE;
1519 struct bpf_prog *bpf_prog_get_type_path(const char *name, enum bpf_prog_type type);
1520 int array_map_alloc_check(union bpf_attr *attr);
1522 int bpf_prog_test_run_xdp(struct bpf_prog *prog, const union bpf_attr *kattr,
1523 union bpf_attr __user *uattr);
1524 int bpf_prog_test_run_skb(struct bpf_prog *prog, const union bpf_attr *kattr,
1525 union bpf_attr __user *uattr);
1526 int bpf_prog_test_run_tracing(struct bpf_prog *prog,
1527 const union bpf_attr *kattr,
1528 union bpf_attr __user *uattr);
1529 int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog,
1530 const union bpf_attr *kattr,
1531 union bpf_attr __user *uattr);
1532 int bpf_prog_test_run_raw_tp(struct bpf_prog *prog,
1533 const union bpf_attr *kattr,
1534 union bpf_attr __user *uattr);
1535 int bpf_prog_test_run_sk_lookup(struct bpf_prog *prog,
1536 const union bpf_attr *kattr,
1537 union bpf_attr __user *uattr);
1538 bool bpf_prog_test_check_kfunc_call(u32 kfunc_id);
1539 bool btf_ctx_access(int off, int size, enum bpf_access_type type,
1540 const struct bpf_prog *prog,
1541 struct bpf_insn_access_aux *info);
1542 int btf_struct_access(struct bpf_verifier_log *log, const struct btf *btf,
1543 const struct btf_type *t, int off, int size,
1544 enum bpf_access_type atype,
1546 bool btf_struct_ids_match(struct bpf_verifier_log *log,
1547 const struct btf *btf, u32 id, int off,
1548 const struct btf *need_btf, u32 need_type_id);
1550 int btf_distill_func_proto(struct bpf_verifier_log *log,
1552 const struct btf_type *func_proto,
1553 const char *func_name,
1554 struct btf_func_model *m);
1556 struct bpf_reg_state;
1557 int btf_check_subprog_arg_match(struct bpf_verifier_env *env, int subprog,
1558 struct bpf_reg_state *regs);
1559 int btf_check_kfunc_arg_match(struct bpf_verifier_env *env,
1560 const struct btf *btf, u32 func_id,
1561 struct bpf_reg_state *regs);
1562 int btf_prepare_func_args(struct bpf_verifier_env *env, int subprog,
1563 struct bpf_reg_state *reg);
1564 int btf_check_type_match(struct bpf_verifier_log *log, const struct bpf_prog *prog,
1565 struct btf *btf, const struct btf_type *t);
1567 struct bpf_prog *bpf_prog_by_id(u32 id);
1568 struct bpf_link *bpf_link_by_id(u32 id);
1570 const struct bpf_func_proto *bpf_base_func_proto(enum bpf_func_id func_id);
1571 void bpf_task_storage_free(struct task_struct *task);
1572 bool bpf_prog_has_kfunc_call(const struct bpf_prog *prog);
1573 const struct btf_func_model *
1574 bpf_jit_find_kfunc_model(const struct bpf_prog *prog,
1575 const struct bpf_insn *insn);
1576 #else /* !CONFIG_BPF_SYSCALL */
1577 static inline struct bpf_prog *bpf_prog_get(u32 ufd)
1579 return ERR_PTR(-EOPNOTSUPP);
1582 static inline struct bpf_prog *bpf_prog_get_type_dev(u32 ufd,
1583 enum bpf_prog_type type,
1586 return ERR_PTR(-EOPNOTSUPP);
1589 static inline void bpf_prog_add(struct bpf_prog *prog, int i)
1593 static inline void bpf_prog_sub(struct bpf_prog *prog, int i)
1597 static inline void bpf_prog_put(struct bpf_prog *prog)
1601 static inline void bpf_prog_inc(struct bpf_prog *prog)
1605 static inline struct bpf_prog *__must_check
1606 bpf_prog_inc_not_zero(struct bpf_prog *prog)
1608 return ERR_PTR(-EOPNOTSUPP);
1611 static inline void bpf_link_init(struct bpf_link *link, enum bpf_link_type type,
1612 const struct bpf_link_ops *ops,
1613 struct bpf_prog *prog)
1617 static inline int bpf_link_prime(struct bpf_link *link,
1618 struct bpf_link_primer *primer)
1623 static inline int bpf_link_settle(struct bpf_link_primer *primer)
1628 static inline void bpf_link_cleanup(struct bpf_link_primer *primer)
1632 static inline void bpf_link_inc(struct bpf_link *link)
1636 static inline void bpf_link_put(struct bpf_link *link)
1640 static inline int bpf_obj_get_user(const char __user *pathname, int flags)
1645 static inline bool dev_map_can_have_prog(struct bpf_map *map)
1650 static inline void __dev_flush(void)
1655 struct bpf_dtab_netdev;
1656 struct bpf_cpu_map_entry;
1659 int dev_xdp_enqueue(struct net_device *dev, struct xdp_buff *xdp,
1660 struct net_device *dev_rx)
1666 int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp,
1667 struct net_device *dev_rx)
1674 static inline int dev_map_generic_redirect(struct bpf_dtab_netdev *dst,
1675 struct sk_buff *skb,
1676 struct bpf_prog *xdp_prog)
1681 static inline void __cpu_map_flush(void)
1685 static inline int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu,
1686 struct xdp_buff *xdp,
1687 struct net_device *dev_rx)
1692 static inline bool cpu_map_prog_allowed(struct bpf_map *map)
1697 static inline struct bpf_prog *bpf_prog_get_type_path(const char *name,
1698 enum bpf_prog_type type)
1700 return ERR_PTR(-EOPNOTSUPP);
1703 static inline int bpf_prog_test_run_xdp(struct bpf_prog *prog,
1704 const union bpf_attr *kattr,
1705 union bpf_attr __user *uattr)
1710 static inline int bpf_prog_test_run_skb(struct bpf_prog *prog,
1711 const union bpf_attr *kattr,
1712 union bpf_attr __user *uattr)
1717 static inline int bpf_prog_test_run_tracing(struct bpf_prog *prog,
1718 const union bpf_attr *kattr,
1719 union bpf_attr __user *uattr)
1724 static inline int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog,
1725 const union bpf_attr *kattr,
1726 union bpf_attr __user *uattr)
1731 static inline int bpf_prog_test_run_sk_lookup(struct bpf_prog *prog,
1732 const union bpf_attr *kattr,
1733 union bpf_attr __user *uattr)
1738 static inline bool bpf_prog_test_check_kfunc_call(u32 kfunc_id)
1743 static inline void bpf_map_put(struct bpf_map *map)
1747 static inline struct bpf_prog *bpf_prog_by_id(u32 id)
1749 return ERR_PTR(-ENOTSUPP);
1752 static inline const struct bpf_func_proto *
1753 bpf_base_func_proto(enum bpf_func_id func_id)
1758 static inline void bpf_task_storage_free(struct task_struct *task)
1762 static inline bool bpf_prog_has_kfunc_call(const struct bpf_prog *prog)
1767 static inline const struct btf_func_model *
1768 bpf_jit_find_kfunc_model(const struct bpf_prog *prog,
1769 const struct bpf_insn *insn)
1773 #endif /* CONFIG_BPF_SYSCALL */
1775 void __bpf_free_used_btfs(struct bpf_prog_aux *aux,
1776 struct btf_mod_pair *used_btfs, u32 len);
1778 static inline struct bpf_prog *bpf_prog_get_type(u32 ufd,
1779 enum bpf_prog_type type)
1781 return bpf_prog_get_type_dev(ufd, type, false);
1784 void __bpf_free_used_maps(struct bpf_prog_aux *aux,
1785 struct bpf_map **used_maps, u32 len);
1787 bool bpf_prog_get_ok(struct bpf_prog *, enum bpf_prog_type *, bool);
1789 int bpf_prog_offload_compile(struct bpf_prog *prog);
1790 void bpf_prog_offload_destroy(struct bpf_prog *prog);
1791 int bpf_prog_offload_info_fill(struct bpf_prog_info *info,
1792 struct bpf_prog *prog);
1794 int bpf_map_offload_info_fill(struct bpf_map_info *info, struct bpf_map *map);
1796 int bpf_map_offload_lookup_elem(struct bpf_map *map, void *key, void *value);
1797 int bpf_map_offload_update_elem(struct bpf_map *map,
1798 void *key, void *value, u64 flags);
1799 int bpf_map_offload_delete_elem(struct bpf_map *map, void *key);
1800 int bpf_map_offload_get_next_key(struct bpf_map *map,
1801 void *key, void *next_key);
1803 bool bpf_offload_prog_map_match(struct bpf_prog *prog, struct bpf_map *map);
1805 struct bpf_offload_dev *
1806 bpf_offload_dev_create(const struct bpf_prog_offload_ops *ops, void *priv);
1807 void bpf_offload_dev_destroy(struct bpf_offload_dev *offdev);
1808 void *bpf_offload_dev_priv(struct bpf_offload_dev *offdev);
1809 int bpf_offload_dev_netdev_register(struct bpf_offload_dev *offdev,
1810 struct net_device *netdev);
1811 void bpf_offload_dev_netdev_unregister(struct bpf_offload_dev *offdev,
1812 struct net_device *netdev);
1813 bool bpf_offload_dev_match(struct bpf_prog *prog, struct net_device *netdev);
1815 #if defined(CONFIG_NET) && defined(CONFIG_BPF_SYSCALL)
1816 int bpf_prog_offload_init(struct bpf_prog *prog, union bpf_attr *attr);
1818 static inline bool bpf_prog_is_dev_bound(const struct bpf_prog_aux *aux)
1820 return aux->offload_requested;
1823 static inline bool bpf_map_is_dev_bound(struct bpf_map *map)
1825 return unlikely(map->ops == &bpf_map_offload_ops);
1828 struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr);
1829 void bpf_map_offload_map_free(struct bpf_map *map);
1831 static inline int bpf_prog_offload_init(struct bpf_prog *prog,
1832 union bpf_attr *attr)
1837 static inline bool bpf_prog_is_dev_bound(struct bpf_prog_aux *aux)
1842 static inline bool bpf_map_is_dev_bound(struct bpf_map *map)
1847 static inline struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr)
1849 return ERR_PTR(-EOPNOTSUPP);
1852 static inline void bpf_map_offload_map_free(struct bpf_map *map)
1855 #endif /* CONFIG_NET && CONFIG_BPF_SYSCALL */
1857 #if defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL)
1858 int sock_map_get_from_fd(const union bpf_attr *attr, struct bpf_prog *prog);
1859 int sock_map_prog_detach(const union bpf_attr *attr, enum bpf_prog_type ptype);
1860 int sock_map_update_elem_sys(struct bpf_map *map, void *key, void *value, u64 flags);
1861 void sock_map_unhash(struct sock *sk);
1862 void sock_map_close(struct sock *sk, long timeout);
1864 void bpf_sk_reuseport_detach(struct sock *sk);
1865 int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map, void *key,
1867 int bpf_fd_reuseport_array_update_elem(struct bpf_map *map, void *key,
1868 void *value, u64 map_flags);
1870 static inline void bpf_sk_reuseport_detach(struct sock *sk)
1874 #ifdef CONFIG_BPF_SYSCALL
1875 static inline int sock_map_get_from_fd(const union bpf_attr *attr,
1876 struct bpf_prog *prog)
1881 static inline int sock_map_prog_detach(const union bpf_attr *attr,
1882 enum bpf_prog_type ptype)
1887 static inline int sock_map_update_elem_sys(struct bpf_map *map, void *key, void *value,
1893 static inline int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map,
1894 void *key, void *value)
1899 static inline int bpf_fd_reuseport_array_update_elem(struct bpf_map *map,
1900 void *key, void *value,
1905 #endif /* CONFIG_BPF_SYSCALL */
1906 #endif /* defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL) */
1908 /* verifier prototypes for helper functions called from eBPF programs */
1909 extern const struct bpf_func_proto bpf_map_lookup_elem_proto;
1910 extern const struct bpf_func_proto bpf_map_update_elem_proto;
1911 extern const struct bpf_func_proto bpf_map_delete_elem_proto;
1912 extern const struct bpf_func_proto bpf_map_push_elem_proto;
1913 extern const struct bpf_func_proto bpf_map_pop_elem_proto;
1914 extern const struct bpf_func_proto bpf_map_peek_elem_proto;
1916 extern const struct bpf_func_proto bpf_get_prandom_u32_proto;
1917 extern const struct bpf_func_proto bpf_get_smp_processor_id_proto;
1918 extern const struct bpf_func_proto bpf_get_numa_node_id_proto;
1919 extern const struct bpf_func_proto bpf_tail_call_proto;
1920 extern const struct bpf_func_proto bpf_ktime_get_ns_proto;
1921 extern const struct bpf_func_proto bpf_ktime_get_boot_ns_proto;
1922 extern const struct bpf_func_proto bpf_get_current_pid_tgid_proto;
1923 extern const struct bpf_func_proto bpf_get_current_uid_gid_proto;
1924 extern const struct bpf_func_proto bpf_get_current_comm_proto;
1925 extern const struct bpf_func_proto bpf_get_stackid_proto;
1926 extern const struct bpf_func_proto bpf_get_stack_proto;
1927 extern const struct bpf_func_proto bpf_get_task_stack_proto;
1928 extern const struct bpf_func_proto bpf_get_stackid_proto_pe;
1929 extern const struct bpf_func_proto bpf_get_stack_proto_pe;
1930 extern const struct bpf_func_proto bpf_sock_map_update_proto;
1931 extern const struct bpf_func_proto bpf_sock_hash_update_proto;
1932 extern const struct bpf_func_proto bpf_get_current_cgroup_id_proto;
1933 extern const struct bpf_func_proto bpf_get_current_ancestor_cgroup_id_proto;
1934 extern const struct bpf_func_proto bpf_msg_redirect_hash_proto;
1935 extern const struct bpf_func_proto bpf_msg_redirect_map_proto;
1936 extern const struct bpf_func_proto bpf_sk_redirect_hash_proto;
1937 extern const struct bpf_func_proto bpf_sk_redirect_map_proto;
1938 extern const struct bpf_func_proto bpf_spin_lock_proto;
1939 extern const struct bpf_func_proto bpf_spin_unlock_proto;
1940 extern const struct bpf_func_proto bpf_get_local_storage_proto;
1941 extern const struct bpf_func_proto bpf_strtol_proto;
1942 extern const struct bpf_func_proto bpf_strtoul_proto;
1943 extern const struct bpf_func_proto bpf_tcp_sock_proto;
1944 extern const struct bpf_func_proto bpf_jiffies64_proto;
1945 extern const struct bpf_func_proto bpf_get_ns_current_pid_tgid_proto;
1946 extern const struct bpf_func_proto bpf_event_output_data_proto;
1947 extern const struct bpf_func_proto bpf_ringbuf_output_proto;
1948 extern const struct bpf_func_proto bpf_ringbuf_reserve_proto;
1949 extern const struct bpf_func_proto bpf_ringbuf_submit_proto;
1950 extern const struct bpf_func_proto bpf_ringbuf_discard_proto;
1951 extern const struct bpf_func_proto bpf_ringbuf_query_proto;
1952 extern const struct bpf_func_proto bpf_skc_to_tcp6_sock_proto;
1953 extern const struct bpf_func_proto bpf_skc_to_tcp_sock_proto;
1954 extern const struct bpf_func_proto bpf_skc_to_tcp_timewait_sock_proto;
1955 extern const struct bpf_func_proto bpf_skc_to_tcp_request_sock_proto;
1956 extern const struct bpf_func_proto bpf_skc_to_udp6_sock_proto;
1957 extern const struct bpf_func_proto bpf_copy_from_user_proto;
1958 extern const struct bpf_func_proto bpf_snprintf_btf_proto;
1959 extern const struct bpf_func_proto bpf_snprintf_proto;
1960 extern const struct bpf_func_proto bpf_per_cpu_ptr_proto;
1961 extern const struct bpf_func_proto bpf_this_cpu_ptr_proto;
1962 extern const struct bpf_func_proto bpf_ktime_get_coarse_ns_proto;
1963 extern const struct bpf_func_proto bpf_sock_from_file_proto;
1964 extern const struct bpf_func_proto bpf_get_socket_ptr_cookie_proto;
1965 extern const struct bpf_func_proto bpf_task_storage_get_proto;
1966 extern const struct bpf_func_proto bpf_task_storage_delete_proto;
1967 extern const struct bpf_func_proto bpf_for_each_map_elem_proto;
1969 const struct bpf_func_proto *bpf_tracing_func_proto(
1970 enum bpf_func_id func_id, const struct bpf_prog *prog);
1972 const struct bpf_func_proto *tracing_prog_func_proto(
1973 enum bpf_func_id func_id, const struct bpf_prog *prog);
1975 /* Shared helpers among cBPF and eBPF. */
1976 void bpf_user_rnd_init_once(void);
1977 u64 bpf_user_rnd_u32(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
1978 u64 bpf_get_raw_cpu_id(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
1980 #if defined(CONFIG_NET)
1981 bool bpf_sock_common_is_valid_access(int off, int size,
1982 enum bpf_access_type type,
1983 struct bpf_insn_access_aux *info);
1984 bool bpf_sock_is_valid_access(int off, int size, enum bpf_access_type type,
1985 struct bpf_insn_access_aux *info);
1986 u32 bpf_sock_convert_ctx_access(enum bpf_access_type type,
1987 const struct bpf_insn *si,
1988 struct bpf_insn *insn_buf,
1989 struct bpf_prog *prog,
1992 static inline bool bpf_sock_common_is_valid_access(int off, int size,
1993 enum bpf_access_type type,
1994 struct bpf_insn_access_aux *info)
1998 static inline bool bpf_sock_is_valid_access(int off, int size,
1999 enum bpf_access_type type,
2000 struct bpf_insn_access_aux *info)
2004 static inline u32 bpf_sock_convert_ctx_access(enum bpf_access_type type,
2005 const struct bpf_insn *si,
2006 struct bpf_insn *insn_buf,
2007 struct bpf_prog *prog,
2015 struct sk_reuseport_kern {
2016 struct sk_buff *skb;
2018 struct sock *selected_sk;
2024 bool bpf_tcp_sock_is_valid_access(int off, int size, enum bpf_access_type type,
2025 struct bpf_insn_access_aux *info);
2027 u32 bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type,
2028 const struct bpf_insn *si,
2029 struct bpf_insn *insn_buf,
2030 struct bpf_prog *prog,
2033 bool bpf_xdp_sock_is_valid_access(int off, int size, enum bpf_access_type type,
2034 struct bpf_insn_access_aux *info);
2036 u32 bpf_xdp_sock_convert_ctx_access(enum bpf_access_type type,
2037 const struct bpf_insn *si,
2038 struct bpf_insn *insn_buf,
2039 struct bpf_prog *prog,
2042 static inline bool bpf_tcp_sock_is_valid_access(int off, int size,
2043 enum bpf_access_type type,
2044 struct bpf_insn_access_aux *info)
2049 static inline u32 bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type,
2050 const struct bpf_insn *si,
2051 struct bpf_insn *insn_buf,
2052 struct bpf_prog *prog,
2057 static inline bool bpf_xdp_sock_is_valid_access(int off, int size,
2058 enum bpf_access_type type,
2059 struct bpf_insn_access_aux *info)
2064 static inline u32 bpf_xdp_sock_convert_ctx_access(enum bpf_access_type type,
2065 const struct bpf_insn *si,
2066 struct bpf_insn *insn_buf,
2067 struct bpf_prog *prog,
2072 #endif /* CONFIG_INET */
2074 enum bpf_text_poke_type {
2079 int bpf_arch_text_poke(void *ip, enum bpf_text_poke_type t,
2080 void *addr1, void *addr2);
2083 bool btf_id_set_contains(const struct btf_id_set *set, u32 id);
2085 int bpf_bprintf_prepare(char *fmt, u32 fmt_size, const u64 *raw_args,
2086 u32 **bin_buf, u32 num_args);
2087 void bpf_bprintf_cleanup(void);
2089 #endif /* _LINUX_BPF_H */