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;
45 extern struct idr btf_idr;
46 extern spinlock_t btf_idr_lock;
47 extern struct kobject *btf_kobj;
49 typedef int (*bpf_iter_init_seq_priv_t)(void *private_data,
50 struct bpf_iter_aux_info *aux);
51 typedef void (*bpf_iter_fini_seq_priv_t)(void *private_data);
52 struct bpf_iter_seq_info {
53 const struct seq_operations *seq_ops;
54 bpf_iter_init_seq_priv_t init_seq_private;
55 bpf_iter_fini_seq_priv_t fini_seq_private;
59 /* map is generic key/value storage optionally accesible by eBPF programs */
61 /* funcs callable from userspace (via syscall) */
62 int (*map_alloc_check)(union bpf_attr *attr);
63 struct bpf_map *(*map_alloc)(union bpf_attr *attr);
64 void (*map_release)(struct bpf_map *map, struct file *map_file);
65 void (*map_free)(struct bpf_map *map);
66 int (*map_get_next_key)(struct bpf_map *map, void *key, void *next_key);
67 void (*map_release_uref)(struct bpf_map *map);
68 void *(*map_lookup_elem_sys_only)(struct bpf_map *map, void *key);
69 int (*map_lookup_batch)(struct bpf_map *map, const union bpf_attr *attr,
70 union bpf_attr __user *uattr);
71 int (*map_lookup_and_delete_batch)(struct bpf_map *map,
72 const union bpf_attr *attr,
73 union bpf_attr __user *uattr);
74 int (*map_update_batch)(struct bpf_map *map, const union bpf_attr *attr,
75 union bpf_attr __user *uattr);
76 int (*map_delete_batch)(struct bpf_map *map, const union bpf_attr *attr,
77 union bpf_attr __user *uattr);
79 /* funcs callable from userspace and from eBPF programs */
80 void *(*map_lookup_elem)(struct bpf_map *map, void *key);
81 int (*map_update_elem)(struct bpf_map *map, void *key, void *value, u64 flags);
82 int (*map_delete_elem)(struct bpf_map *map, void *key);
83 int (*map_push_elem)(struct bpf_map *map, void *value, u64 flags);
84 int (*map_pop_elem)(struct bpf_map *map, void *value);
85 int (*map_peek_elem)(struct bpf_map *map, void *value);
87 /* funcs called by prog_array and perf_event_array map */
88 void *(*map_fd_get_ptr)(struct bpf_map *map, struct file *map_file,
90 void (*map_fd_put_ptr)(void *ptr);
91 int (*map_gen_lookup)(struct bpf_map *map, struct bpf_insn *insn_buf);
92 u32 (*map_fd_sys_lookup_elem)(void *ptr);
93 void (*map_seq_show_elem)(struct bpf_map *map, void *key,
95 int (*map_check_btf)(const struct bpf_map *map,
96 const struct btf *btf,
97 const struct btf_type *key_type,
98 const struct btf_type *value_type);
100 /* Prog poke tracking helpers. */
101 int (*map_poke_track)(struct bpf_map *map, struct bpf_prog_aux *aux);
102 void (*map_poke_untrack)(struct bpf_map *map, struct bpf_prog_aux *aux);
103 void (*map_poke_run)(struct bpf_map *map, u32 key, struct bpf_prog *old,
104 struct bpf_prog *new);
106 /* Direct value access helpers. */
107 int (*map_direct_value_addr)(const struct bpf_map *map,
109 int (*map_direct_value_meta)(const struct bpf_map *map,
111 int (*map_mmap)(struct bpf_map *map, struct vm_area_struct *vma);
112 __poll_t (*map_poll)(struct bpf_map *map, struct file *filp,
113 struct poll_table_struct *pts);
115 /* Functions called by bpf_local_storage maps */
116 int (*map_local_storage_charge)(struct bpf_local_storage_map *smap,
117 void *owner, u32 size);
118 void (*map_local_storage_uncharge)(struct bpf_local_storage_map *smap,
119 void *owner, u32 size);
120 struct bpf_local_storage __rcu ** (*map_owner_storage_ptr)(void *owner);
122 /* map_meta_equal must be implemented for maps that can be
123 * used as an inner map. It is a runtime check to ensure
124 * an inner map can be inserted to an outer map.
126 * Some properties of the inner map has been used during the
127 * verification time. When inserting an inner map at the runtime,
128 * map_meta_equal has to ensure the inserting map has the same
129 * properties that the verifier has used earlier.
131 bool (*map_meta_equal)(const struct bpf_map *meta0,
132 const struct bpf_map *meta1);
134 /* BTF name and id of struct allocated by map_alloc */
135 const char * const map_btf_name;
138 /* bpf_iter info used to open a seq_file */
139 const struct bpf_iter_seq_info *iter_seq_info;
143 /* The first two cachelines with read-mostly members of which some
144 * are also accessed in fast-path (e.g. ops, max_entries).
146 const struct bpf_map_ops *ops ____cacheline_aligned;
147 struct bpf_map *inner_map_meta;
148 #ifdef CONFIG_SECURITY
151 enum bpf_map_type map_type;
156 int spin_lock_off; /* >=0 valid offset, <0 error */
160 u32 btf_value_type_id;
162 #ifdef CONFIG_MEMCG_KMEM
163 struct mem_cgroup *memcg;
165 char name[BPF_OBJ_NAME_LEN];
166 u32 btf_vmlinux_value_type_id;
168 bool frozen; /* write-once; write-protected by freeze_mutex */
171 /* The 3rd and 4th cacheline with misc members to avoid false sharing
172 * particularly with refcounting.
174 atomic64_t refcnt ____cacheline_aligned;
176 struct work_struct work;
177 struct mutex freeze_mutex;
178 u64 writecnt; /* writable mmap cnt; protected by freeze_mutex */
181 static inline bool map_value_has_spin_lock(const struct bpf_map *map)
183 return map->spin_lock_off >= 0;
186 static inline void check_and_init_map_lock(struct bpf_map *map, void *dst)
188 if (likely(!map_value_has_spin_lock(map)))
190 *(struct bpf_spin_lock *)(dst + map->spin_lock_off) =
191 (struct bpf_spin_lock){};
194 /* copy everything but bpf_spin_lock */
195 static inline void copy_map_value(struct bpf_map *map, void *dst, void *src)
197 if (unlikely(map_value_has_spin_lock(map))) {
198 u32 off = map->spin_lock_off;
200 memcpy(dst, src, off);
201 memcpy(dst + off + sizeof(struct bpf_spin_lock),
202 src + off + sizeof(struct bpf_spin_lock),
203 map->value_size - off - sizeof(struct bpf_spin_lock));
205 memcpy(dst, src, map->value_size);
208 void copy_map_value_locked(struct bpf_map *map, void *dst, void *src,
210 int bpf_obj_name_cpy(char *dst, const char *src, unsigned int size);
212 struct bpf_offload_dev;
213 struct bpf_offloaded_map;
215 struct bpf_map_dev_ops {
216 int (*map_get_next_key)(struct bpf_offloaded_map *map,
217 void *key, void *next_key);
218 int (*map_lookup_elem)(struct bpf_offloaded_map *map,
219 void *key, void *value);
220 int (*map_update_elem)(struct bpf_offloaded_map *map,
221 void *key, void *value, u64 flags);
222 int (*map_delete_elem)(struct bpf_offloaded_map *map, void *key);
225 struct bpf_offloaded_map {
227 struct net_device *netdev;
228 const struct bpf_map_dev_ops *dev_ops;
230 struct list_head offloads;
233 static inline struct bpf_offloaded_map *map_to_offmap(struct bpf_map *map)
235 return container_of(map, struct bpf_offloaded_map, map);
238 static inline bool bpf_map_offload_neutral(const struct bpf_map *map)
240 return map->map_type == BPF_MAP_TYPE_PERF_EVENT_ARRAY;
243 static inline bool bpf_map_support_seq_show(const struct bpf_map *map)
245 return (map->btf_value_type_id || map->btf_vmlinux_value_type_id) &&
246 map->ops->map_seq_show_elem;
249 int map_check_no_btf(const struct bpf_map *map,
250 const struct btf *btf,
251 const struct btf_type *key_type,
252 const struct btf_type *value_type);
254 bool bpf_map_meta_equal(const struct bpf_map *meta0,
255 const struct bpf_map *meta1);
257 extern const struct bpf_map_ops bpf_map_offload_ops;
259 /* function argument constraints */
261 ARG_DONTCARE = 0, /* unused argument in helper function */
263 /* the following constraints used to prototype
264 * bpf_map_lookup/update/delete_elem() functions
266 ARG_CONST_MAP_PTR, /* const argument used as pointer to bpf_map */
267 ARG_PTR_TO_MAP_KEY, /* pointer to stack used as map key */
268 ARG_PTR_TO_MAP_VALUE, /* pointer to stack used as map value */
269 ARG_PTR_TO_UNINIT_MAP_VALUE, /* pointer to valid memory used to store a map value */
270 ARG_PTR_TO_MAP_VALUE_OR_NULL, /* pointer to stack used as map value or NULL */
272 /* the following constraints used to prototype bpf_memcmp() and other
273 * functions that access data on eBPF program stack
275 ARG_PTR_TO_MEM, /* pointer to valid memory (stack, packet, map value) */
276 ARG_PTR_TO_MEM_OR_NULL, /* pointer to valid memory or NULL */
277 ARG_PTR_TO_UNINIT_MEM, /* pointer to memory does not need to be initialized,
278 * helper function must fill all bytes or clear
279 * them in error case.
282 ARG_CONST_SIZE, /* number of bytes accessed from memory */
283 ARG_CONST_SIZE_OR_ZERO, /* number of bytes accessed from memory or 0 */
285 ARG_PTR_TO_CTX, /* pointer to context */
286 ARG_PTR_TO_CTX_OR_NULL, /* pointer to context or NULL */
287 ARG_ANYTHING, /* any (initialized) argument is ok */
288 ARG_PTR_TO_SPIN_LOCK, /* pointer to bpf_spin_lock */
289 ARG_PTR_TO_SOCK_COMMON, /* pointer to sock_common */
290 ARG_PTR_TO_INT, /* pointer to int */
291 ARG_PTR_TO_LONG, /* pointer to long */
292 ARG_PTR_TO_SOCKET, /* pointer to bpf_sock (fullsock) */
293 ARG_PTR_TO_SOCKET_OR_NULL, /* pointer to bpf_sock (fullsock) or NULL */
294 ARG_PTR_TO_BTF_ID, /* pointer to in-kernel struct */
295 ARG_PTR_TO_ALLOC_MEM, /* pointer to dynamically allocated memory */
296 ARG_PTR_TO_ALLOC_MEM_OR_NULL, /* pointer to dynamically allocated memory or NULL */
297 ARG_CONST_ALLOC_SIZE_OR_ZERO, /* number of allocated bytes requested */
298 ARG_PTR_TO_BTF_ID_SOCK_COMMON, /* pointer to in-kernel sock_common or bpf-mirrored bpf_sock */
299 ARG_PTR_TO_PERCPU_BTF_ID, /* pointer to in-kernel percpu type */
303 /* type of values returned from helper functions */
304 enum bpf_return_type {
305 RET_INTEGER, /* function returns integer */
306 RET_VOID, /* function doesn't return anything */
307 RET_PTR_TO_MAP_VALUE, /* returns a pointer to map elem value */
308 RET_PTR_TO_MAP_VALUE_OR_NULL, /* returns a pointer to map elem value or NULL */
309 RET_PTR_TO_SOCKET_OR_NULL, /* returns a pointer to a socket or NULL */
310 RET_PTR_TO_TCP_SOCK_OR_NULL, /* returns a pointer to a tcp_sock or NULL */
311 RET_PTR_TO_SOCK_COMMON_OR_NULL, /* returns a pointer to a sock_common or NULL */
312 RET_PTR_TO_ALLOC_MEM_OR_NULL, /* returns a pointer to dynamically allocated memory or NULL */
313 RET_PTR_TO_BTF_ID_OR_NULL, /* returns a pointer to a btf_id or NULL */
314 RET_PTR_TO_MEM_OR_BTF_ID_OR_NULL, /* returns a pointer to a valid memory or a btf_id or NULL */
315 RET_PTR_TO_MEM_OR_BTF_ID, /* returns a pointer to a valid memory or a btf_id */
316 RET_PTR_TO_BTF_ID, /* returns a pointer to a btf_id */
319 /* eBPF function prototype used by verifier to allow BPF_CALLs from eBPF programs
320 * to in-kernel helper functions and for adjusting imm32 field in BPF_CALL
321 * instructions after verifying
323 struct bpf_func_proto {
324 u64 (*func)(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
327 enum bpf_return_type ret_type;
330 enum bpf_arg_type arg1_type;
331 enum bpf_arg_type arg2_type;
332 enum bpf_arg_type arg3_type;
333 enum bpf_arg_type arg4_type;
334 enum bpf_arg_type arg5_type;
336 enum bpf_arg_type arg_type[5];
348 int *ret_btf_id; /* return value btf_id */
349 bool (*allowed)(const struct bpf_prog *prog);
352 /* bpf_context is intentionally undefined structure. Pointer to bpf_context is
353 * the first argument to eBPF programs.
354 * For socket filters: 'struct bpf_context *' == 'struct sk_buff *'
358 enum bpf_access_type {
363 /* types of values stored in eBPF registers */
364 /* Pointer types represent:
367 * pointer + (u16) var
368 * pointer + (u16) var + imm
369 * if (range > 0) then [ptr, ptr + range - off) is safe to access
370 * if (id > 0) means that some 'var' was added
371 * if (off > 0) means that 'imm' was added
374 NOT_INIT = 0, /* nothing was written into register */
375 SCALAR_VALUE, /* reg doesn't contain a valid pointer */
376 PTR_TO_CTX, /* reg points to bpf_context */
377 CONST_PTR_TO_MAP, /* reg points to struct bpf_map */
378 PTR_TO_MAP_VALUE, /* reg points to map element value */
379 PTR_TO_MAP_VALUE_OR_NULL,/* points to map elem value or NULL */
380 PTR_TO_STACK, /* reg == frame_pointer + offset */
381 PTR_TO_PACKET_META, /* skb->data - meta_len */
382 PTR_TO_PACKET, /* reg points to skb->data */
383 PTR_TO_PACKET_END, /* skb->data + headlen */
384 PTR_TO_FLOW_KEYS, /* reg points to bpf_flow_keys */
385 PTR_TO_SOCKET, /* reg points to struct bpf_sock */
386 PTR_TO_SOCKET_OR_NULL, /* reg points to struct bpf_sock or NULL */
387 PTR_TO_SOCK_COMMON, /* reg points to sock_common */
388 PTR_TO_SOCK_COMMON_OR_NULL, /* reg points to sock_common or NULL */
389 PTR_TO_TCP_SOCK, /* reg points to struct tcp_sock */
390 PTR_TO_TCP_SOCK_OR_NULL, /* reg points to struct tcp_sock or NULL */
391 PTR_TO_TP_BUFFER, /* reg points to a writable raw tp's buffer */
392 PTR_TO_XDP_SOCK, /* reg points to struct xdp_sock */
393 /* PTR_TO_BTF_ID points to a kernel struct that does not need
394 * to be null checked by the BPF program. This does not imply the
395 * pointer is _not_ null and in practice this can easily be a null
396 * pointer when reading pointer chains. The assumption is program
397 * context will handle null pointer dereference typically via fault
398 * handling. The verifier must keep this in mind and can make no
399 * assumptions about null or non-null when doing branch analysis.
400 * Further, when passed into helpers the helpers can not, without
401 * additional context, assume the value is non-null.
404 /* PTR_TO_BTF_ID_OR_NULL points to a kernel struct that has not
405 * been checked for null. Used primarily to inform the verifier
406 * an explicit null check is required for this struct.
408 PTR_TO_BTF_ID_OR_NULL,
409 PTR_TO_MEM, /* reg points to valid memory region */
410 PTR_TO_MEM_OR_NULL, /* reg points to valid memory region or NULL */
411 PTR_TO_RDONLY_BUF, /* reg points to a readonly buffer */
412 PTR_TO_RDONLY_BUF_OR_NULL, /* reg points to a readonly buffer or NULL */
413 PTR_TO_RDWR_BUF, /* reg points to a read/write buffer */
414 PTR_TO_RDWR_BUF_OR_NULL, /* reg points to a read/write buffer or NULL */
415 PTR_TO_PERCPU_BTF_ID, /* reg points to a percpu kernel variable */
418 /* The information passed from prog-specific *_is_valid_access
419 * back to the verifier.
421 struct bpf_insn_access_aux {
422 enum bpf_reg_type reg_type;
430 struct bpf_verifier_log *log; /* for verbose logs */
434 bpf_ctx_record_field_size(struct bpf_insn_access_aux *aux, u32 size)
436 aux->ctx_field_size = size;
439 struct bpf_prog_ops {
440 int (*test_run)(struct bpf_prog *prog, const union bpf_attr *kattr,
441 union bpf_attr __user *uattr);
444 struct bpf_verifier_ops {
445 /* return eBPF function prototype for verification */
446 const struct bpf_func_proto *
447 (*get_func_proto)(enum bpf_func_id func_id,
448 const struct bpf_prog *prog);
450 /* return true if 'size' wide access at offset 'off' within bpf_context
451 * with 'type' (read or write) is allowed
453 bool (*is_valid_access)(int off, int size, enum bpf_access_type type,
454 const struct bpf_prog *prog,
455 struct bpf_insn_access_aux *info);
456 int (*gen_prologue)(struct bpf_insn *insn, bool direct_write,
457 const struct bpf_prog *prog);
458 int (*gen_ld_abs)(const struct bpf_insn *orig,
459 struct bpf_insn *insn_buf);
460 u32 (*convert_ctx_access)(enum bpf_access_type type,
461 const struct bpf_insn *src,
462 struct bpf_insn *dst,
463 struct bpf_prog *prog, u32 *target_size);
464 int (*btf_struct_access)(struct bpf_verifier_log *log,
465 const struct btf *btf,
466 const struct btf_type *t, int off, int size,
467 enum bpf_access_type atype,
471 struct bpf_prog_offload_ops {
472 /* verifier basic callbacks */
473 int (*insn_hook)(struct bpf_verifier_env *env,
474 int insn_idx, int prev_insn_idx);
475 int (*finalize)(struct bpf_verifier_env *env);
476 /* verifier optimization callbacks (called after .finalize) */
477 int (*replace_insn)(struct bpf_verifier_env *env, u32 off,
478 struct bpf_insn *insn);
479 int (*remove_insns)(struct bpf_verifier_env *env, u32 off, u32 cnt);
480 /* program management callbacks */
481 int (*prepare)(struct bpf_prog *prog);
482 int (*translate)(struct bpf_prog *prog);
483 void (*destroy)(struct bpf_prog *prog);
486 struct bpf_prog_offload {
487 struct bpf_prog *prog;
488 struct net_device *netdev;
489 struct bpf_offload_dev *offdev;
491 struct list_head offloads;
498 enum bpf_cgroup_storage_type {
499 BPF_CGROUP_STORAGE_SHARED,
500 BPF_CGROUP_STORAGE_PERCPU,
501 __BPF_CGROUP_STORAGE_MAX
504 #define MAX_BPF_CGROUP_STORAGE_TYPE __BPF_CGROUP_STORAGE_MAX
506 /* The longest tracepoint has 12 args.
507 * See include/trace/bpf_probe.h
509 #define MAX_BPF_FUNC_ARGS 12
511 struct btf_func_model {
514 u8 arg_size[MAX_BPF_FUNC_ARGS];
517 /* Restore arguments before returning from trampoline to let original function
518 * continue executing. This flag is used for fentry progs when there are no
521 #define BPF_TRAMP_F_RESTORE_REGS BIT(0)
522 /* Call original function after fentry progs, but before fexit progs.
523 * Makes sense for fentry/fexit, normal calls and indirect calls.
525 #define BPF_TRAMP_F_CALL_ORIG BIT(1)
526 /* Skip current frame and return to parent. Makes sense for fentry/fexit
527 * programs only. Should not be used with normal calls and indirect calls.
529 #define BPF_TRAMP_F_SKIP_FRAME BIT(2)
531 /* Each call __bpf_prog_enter + call bpf_func + call __bpf_prog_exit is ~50
532 * bytes on x86. Pick a number to fit into BPF_IMAGE_SIZE / 2
534 #define BPF_MAX_TRAMP_PROGS 38
536 struct bpf_tramp_progs {
537 struct bpf_prog *progs[BPF_MAX_TRAMP_PROGS];
541 /* Different use cases for BPF trampoline:
542 * 1. replace nop at the function entry (kprobe equivalent)
543 * flags = BPF_TRAMP_F_RESTORE_REGS
544 * fentry = a set of programs to run before returning from trampoline
546 * 2. replace nop at the function entry (kprobe + kretprobe equivalent)
547 * flags = BPF_TRAMP_F_CALL_ORIG | BPF_TRAMP_F_SKIP_FRAME
548 * orig_call = fentry_ip + MCOUNT_INSN_SIZE
549 * fentry = a set of program to run before calling original function
550 * fexit = a set of program to run after original function
552 * 3. replace direct call instruction anywhere in the function body
553 * or assign a function pointer for indirect call (like tcp_congestion_ops->cong_avoid)
555 * fentry = a set of programs to run before returning from trampoline
556 * With flags = BPF_TRAMP_F_CALL_ORIG
557 * orig_call = original callback addr or direct function addr
558 * fentry = a set of program to run before calling original function
559 * fexit = a set of program to run after original function
561 struct bpf_tramp_image;
562 int arch_prepare_bpf_trampoline(struct bpf_tramp_image *tr, void *image, void *image_end,
563 const struct btf_func_model *m, u32 flags,
564 struct bpf_tramp_progs *tprogs,
566 /* these two functions are called from generated trampoline */
567 u64 notrace __bpf_prog_enter(struct bpf_prog *prog);
568 void notrace __bpf_prog_exit(struct bpf_prog *prog, u64 start);
569 u64 notrace __bpf_prog_enter_sleepable(struct bpf_prog *prog);
570 void notrace __bpf_prog_exit_sleepable(struct bpf_prog *prog, u64 start);
571 void notrace __bpf_tramp_enter(struct bpf_tramp_image *tr);
572 void notrace __bpf_tramp_exit(struct bpf_tramp_image *tr);
577 char name[KSYM_NAME_LEN];
578 struct list_head lnode;
579 struct latch_tree_node tnode;
583 enum bpf_tramp_prog_type {
586 BPF_TRAMP_MODIFY_RETURN,
588 BPF_TRAMP_REPLACE, /* more than MAX */
591 struct bpf_tramp_image {
593 struct bpf_ksym ksym;
594 struct percpu_ref pcref;
599 struct work_struct work;
603 struct bpf_trampoline {
604 /* hlist for trampoline_table */
605 struct hlist_node hlist;
606 /* serializes access to fields of this trampoline */
611 struct btf_func_model model;
615 /* if !NULL this is BPF_PROG_TYPE_EXT program that extends another BPF
616 * program by replacing one of its functions. func.addr is the address
617 * of the function it replaced.
619 struct bpf_prog *extension_prog;
620 /* list of BPF programs using this trampoline */
621 struct hlist_head progs_hlist[BPF_TRAMP_MAX];
622 /* Number of attached programs. A counter per kind. */
623 int progs_cnt[BPF_TRAMP_MAX];
624 /* Executable image of trampoline */
625 struct bpf_tramp_image *cur_image;
630 struct bpf_attach_target_info {
631 struct btf_func_model fmodel;
633 const char *tgt_name;
634 const struct btf_type *tgt_type;
637 #define BPF_DISPATCHER_MAX 48 /* Fits in 2048B */
639 struct bpf_dispatcher_prog {
640 struct bpf_prog *prog;
644 struct bpf_dispatcher {
645 /* dispatcher mutex */
648 struct bpf_dispatcher_prog progs[BPF_DISPATCHER_MAX];
652 struct bpf_ksym ksym;
655 static __always_inline unsigned int bpf_dispatcher_nop_func(
657 const struct bpf_insn *insnsi,
658 unsigned int (*bpf_func)(const void *,
659 const struct bpf_insn *))
661 return bpf_func(ctx, insnsi);
663 #ifdef CONFIG_BPF_JIT
664 int bpf_trampoline_link_prog(struct bpf_prog *prog, struct bpf_trampoline *tr);
665 int bpf_trampoline_unlink_prog(struct bpf_prog *prog, struct bpf_trampoline *tr);
666 struct bpf_trampoline *bpf_trampoline_get(u64 key,
667 struct bpf_attach_target_info *tgt_info);
668 void bpf_trampoline_put(struct bpf_trampoline *tr);
669 #define BPF_DISPATCHER_INIT(_name) { \
670 .mutex = __MUTEX_INITIALIZER(_name.mutex), \
671 .func = &_name##_func, \
678 .lnode = LIST_HEAD_INIT(_name.ksym.lnode), \
682 #define DEFINE_BPF_DISPATCHER(name) \
683 noinline unsigned int bpf_dispatcher_##name##_func( \
685 const struct bpf_insn *insnsi, \
686 unsigned int (*bpf_func)(const void *, \
687 const struct bpf_insn *)) \
689 return bpf_func(ctx, insnsi); \
691 EXPORT_SYMBOL(bpf_dispatcher_##name##_func); \
692 struct bpf_dispatcher bpf_dispatcher_##name = \
693 BPF_DISPATCHER_INIT(bpf_dispatcher_##name);
694 #define DECLARE_BPF_DISPATCHER(name) \
695 unsigned int bpf_dispatcher_##name##_func( \
697 const struct bpf_insn *insnsi, \
698 unsigned int (*bpf_func)(const void *, \
699 const struct bpf_insn *)); \
700 extern struct bpf_dispatcher bpf_dispatcher_##name;
701 #define BPF_DISPATCHER_FUNC(name) bpf_dispatcher_##name##_func
702 #define BPF_DISPATCHER_PTR(name) (&bpf_dispatcher_##name)
703 void bpf_dispatcher_change_prog(struct bpf_dispatcher *d, struct bpf_prog *from,
704 struct bpf_prog *to);
705 /* Called only from JIT-enabled code, so there's no need for stubs. */
706 void *bpf_jit_alloc_exec_page(void);
707 void bpf_image_ksym_add(void *data, struct bpf_ksym *ksym);
708 void bpf_image_ksym_del(struct bpf_ksym *ksym);
709 void bpf_ksym_add(struct bpf_ksym *ksym);
710 void bpf_ksym_del(struct bpf_ksym *ksym);
711 int bpf_jit_charge_modmem(u32 pages);
712 void bpf_jit_uncharge_modmem(u32 pages);
714 static inline int bpf_trampoline_link_prog(struct bpf_prog *prog,
715 struct bpf_trampoline *tr)
719 static inline int bpf_trampoline_unlink_prog(struct bpf_prog *prog,
720 struct bpf_trampoline *tr)
724 static inline struct bpf_trampoline *bpf_trampoline_get(u64 key,
725 struct bpf_attach_target_info *tgt_info)
727 return ERR_PTR(-EOPNOTSUPP);
729 static inline void bpf_trampoline_put(struct bpf_trampoline *tr) {}
730 #define DEFINE_BPF_DISPATCHER(name)
731 #define DECLARE_BPF_DISPATCHER(name)
732 #define BPF_DISPATCHER_FUNC(name) bpf_dispatcher_nop_func
733 #define BPF_DISPATCHER_PTR(name) NULL
734 static inline void bpf_dispatcher_change_prog(struct bpf_dispatcher *d,
735 struct bpf_prog *from,
736 struct bpf_prog *to) {}
737 static inline bool is_bpf_image_address(unsigned long address)
743 struct bpf_func_info_aux {
748 enum bpf_jit_poke_reason {
749 BPF_POKE_REASON_TAIL_CALL,
752 /* Descriptor of pokes pointing /into/ the JITed image. */
753 struct bpf_jit_poke_descriptor {
754 void *tailcall_target;
755 void *tailcall_bypass;
763 bool tailcall_target_stable;
769 /* reg_type info for ctx arguments */
770 struct bpf_ctx_arg_aux {
772 enum bpf_reg_type reg_type;
776 struct btf_mod_pair {
778 struct module *module;
781 struct bpf_prog_aux {
790 u32 func_cnt; /* used by non-func prog as the number of func progs */
791 u32 func_idx; /* 0 for non-func prog, the index in func array for func prog */
792 u32 attach_btf_id; /* in-kernel BTF type id to attach to */
793 u32 ctx_arg_info_size;
794 u32 max_rdonly_access;
796 struct btf *attach_btf;
797 const struct bpf_ctx_arg_aux *ctx_arg_info;
798 struct mutex dst_mutex; /* protects dst_* pointers below, *after* prog becomes visible */
799 struct bpf_prog *dst_prog;
800 struct bpf_trampoline *dst_trampoline;
801 enum bpf_prog_type saved_dst_prog_type;
802 enum bpf_attach_type saved_dst_attach_type;
803 bool verifier_zext; /* Zero extensions has been inserted by verifier. */
804 bool offload_requested;
805 bool attach_btf_trace; /* true if attaching to BTF-enabled raw tp */
806 bool func_proto_unreliable;
808 bool tail_call_reachable;
809 struct hlist_node tramp_hlist;
810 /* BTF_KIND_FUNC_PROTO for valid attach_btf_id */
811 const struct btf_type *attach_func_proto;
812 /* function name for valid attach_btf_id */
813 const char *attach_func_name;
814 struct bpf_prog **func;
815 void *jit_data; /* JIT specific data. arch dependent */
816 struct bpf_jit_poke_descriptor *poke_tab;
818 struct bpf_ksym ksym;
819 const struct bpf_prog_ops *ops;
820 struct bpf_map **used_maps;
821 struct mutex used_maps_mutex; /* mutex for used_maps and used_map_cnt */
822 struct btf_mod_pair *used_btfs;
823 struct bpf_prog *prog;
824 struct user_struct *user;
825 u64 load_time; /* ns since boottime */
826 struct bpf_map *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE];
827 char name[BPF_OBJ_NAME_LEN];
828 #ifdef CONFIG_SECURITY
831 struct bpf_prog_offload *offload;
833 struct bpf_func_info *func_info;
834 struct bpf_func_info_aux *func_info_aux;
835 /* bpf_line_info loaded from userspace. linfo->insn_off
836 * has the xlated insn offset.
837 * Both the main and sub prog share the same linfo.
838 * The subprog can access its first linfo by
839 * using the linfo_idx.
841 struct bpf_line_info *linfo;
842 /* jited_linfo is the jited addr of the linfo. It has a
843 * one to one mapping to linfo:
844 * jited_linfo[i] is the jited addr for the linfo[i]->insn_off.
845 * Both the main and sub prog share the same jited_linfo.
846 * The subprog can access its first jited_linfo by
847 * using the linfo_idx.
852 /* subprog can use linfo_idx to access its first linfo and
854 * main prog always has linfo_idx == 0
858 struct exception_table_entry *extable;
860 struct work_struct work;
865 struct bpf_array_aux {
866 /* 'Ownership' of prog array is claimed by the first program that
867 * is going to use this map or by the first program which FD is
868 * stored in the map to make sure that all callers and callees have
869 * the same prog type and JITed flag.
871 enum bpf_prog_type type;
873 /* Programs with direct jumps into programs part of this array. */
874 struct list_head poke_progs;
876 struct mutex poke_mutex;
877 struct work_struct work;
883 enum bpf_link_type type;
884 const struct bpf_link_ops *ops;
885 struct bpf_prog *prog;
886 struct work_struct work;
889 struct bpf_link_ops {
890 void (*release)(struct bpf_link *link);
891 void (*dealloc)(struct bpf_link *link);
892 int (*detach)(struct bpf_link *link);
893 int (*update_prog)(struct bpf_link *link, struct bpf_prog *new_prog,
894 struct bpf_prog *old_prog);
895 void (*show_fdinfo)(const struct bpf_link *link, struct seq_file *seq);
896 int (*fill_link_info)(const struct bpf_link *link,
897 struct bpf_link_info *info);
900 struct bpf_link_primer {
901 struct bpf_link *link;
907 struct bpf_struct_ops_value;
911 #define BPF_STRUCT_OPS_MAX_NR_MEMBERS 64
912 struct bpf_struct_ops {
913 const struct bpf_verifier_ops *verifier_ops;
914 int (*init)(struct btf *btf);
915 int (*check_member)(const struct btf_type *t,
916 const struct btf_member *member);
917 int (*init_member)(const struct btf_type *t,
918 const struct btf_member *member,
919 void *kdata, const void *udata);
920 int (*reg)(void *kdata);
921 void (*unreg)(void *kdata);
922 const struct btf_type *type;
923 const struct btf_type *value_type;
925 struct btf_func_model func_models[BPF_STRUCT_OPS_MAX_NR_MEMBERS];
930 #if defined(CONFIG_BPF_JIT) && defined(CONFIG_BPF_SYSCALL)
931 #define BPF_MODULE_OWNER ((void *)((0xeB9FUL << 2) + POISON_POINTER_DELTA))
932 const struct bpf_struct_ops *bpf_struct_ops_find(u32 type_id);
933 void bpf_struct_ops_init(struct btf *btf, struct bpf_verifier_log *log);
934 bool bpf_struct_ops_get(const void *kdata);
935 void bpf_struct_ops_put(const void *kdata);
936 int bpf_struct_ops_map_sys_lookup_elem(struct bpf_map *map, void *key,
938 static inline bool bpf_try_module_get(const void *data, struct module *owner)
940 if (owner == BPF_MODULE_OWNER)
941 return bpf_struct_ops_get(data);
943 return try_module_get(owner);
945 static inline void bpf_module_put(const void *data, struct module *owner)
947 if (owner == BPF_MODULE_OWNER)
948 bpf_struct_ops_put(data);
953 static inline const struct bpf_struct_ops *bpf_struct_ops_find(u32 type_id)
957 static inline void bpf_struct_ops_init(struct btf *btf,
958 struct bpf_verifier_log *log)
961 static inline bool bpf_try_module_get(const void *data, struct module *owner)
963 return try_module_get(owner);
965 static inline void bpf_module_put(const void *data, struct module *owner)
969 static inline int bpf_struct_ops_map_sys_lookup_elem(struct bpf_map *map,
981 struct bpf_array_aux *aux;
983 char value[0] __aligned(8);
984 void *ptrs[0] __aligned(8);
985 void __percpu *pptrs[0] __aligned(8);
989 #define BPF_COMPLEXITY_LIMIT_INSNS 1000000 /* yes. 1M insns */
990 #define MAX_TAIL_CALL_CNT 32
992 #define BPF_F_ACCESS_MASK (BPF_F_RDONLY | \
993 BPF_F_RDONLY_PROG | \
997 #define BPF_MAP_CAN_READ BIT(0)
998 #define BPF_MAP_CAN_WRITE BIT(1)
1000 static inline u32 bpf_map_flags_to_cap(struct bpf_map *map)
1002 u32 access_flags = map->map_flags & (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG);
1004 /* Combination of BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG is
1007 if (access_flags & BPF_F_RDONLY_PROG)
1008 return BPF_MAP_CAN_READ;
1009 else if (access_flags & BPF_F_WRONLY_PROG)
1010 return BPF_MAP_CAN_WRITE;
1012 return BPF_MAP_CAN_READ | BPF_MAP_CAN_WRITE;
1015 static inline bool bpf_map_flags_access_ok(u32 access_flags)
1017 return (access_flags & (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG)) !=
1018 (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG);
1021 struct bpf_event_entry {
1022 struct perf_event *event;
1023 struct file *perf_file;
1024 struct file *map_file;
1025 struct rcu_head rcu;
1028 bool bpf_prog_array_compatible(struct bpf_array *array, const struct bpf_prog *fp);
1029 int bpf_prog_calc_tag(struct bpf_prog *fp);
1031 const struct bpf_func_proto *bpf_get_trace_printk_proto(void);
1033 typedef unsigned long (*bpf_ctx_copy_t)(void *dst, const void *src,
1034 unsigned long off, unsigned long len);
1035 typedef u32 (*bpf_convert_ctx_access_t)(enum bpf_access_type type,
1036 const struct bpf_insn *src,
1037 struct bpf_insn *dst,
1038 struct bpf_prog *prog,
1041 u64 bpf_event_output(struct bpf_map *map, u64 flags, void *meta, u64 meta_size,
1042 void *ctx, u64 ctx_size, bpf_ctx_copy_t ctx_copy);
1044 /* an array of programs to be executed under rcu_lock.
1047 * ret = BPF_PROG_RUN_ARRAY(&bpf_prog_array, ctx, BPF_PROG_RUN);
1049 * the structure returned by bpf_prog_array_alloc() should be populated
1050 * with program pointers and the last pointer must be NULL.
1051 * The user has to keep refcnt on the program and make sure the program
1052 * is removed from the array before bpf_prog_put().
1053 * The 'struct bpf_prog_array *' should only be replaced with xchg()
1054 * since other cpus are walking the array of pointers in parallel.
1056 struct bpf_prog_array_item {
1057 struct bpf_prog *prog;
1058 struct bpf_cgroup_storage *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE];
1061 struct bpf_prog_array {
1062 struct rcu_head rcu;
1063 struct bpf_prog_array_item items[];
1066 struct bpf_prog_array *bpf_prog_array_alloc(u32 prog_cnt, gfp_t flags);
1067 void bpf_prog_array_free(struct bpf_prog_array *progs);
1068 int bpf_prog_array_length(struct bpf_prog_array *progs);
1069 bool bpf_prog_array_is_empty(struct bpf_prog_array *array);
1070 int bpf_prog_array_copy_to_user(struct bpf_prog_array *progs,
1071 __u32 __user *prog_ids, u32 cnt);
1073 void bpf_prog_array_delete_safe(struct bpf_prog_array *progs,
1074 struct bpf_prog *old_prog);
1075 int bpf_prog_array_delete_safe_at(struct bpf_prog_array *array, int index);
1076 int bpf_prog_array_update_at(struct bpf_prog_array *array, int index,
1077 struct bpf_prog *prog);
1078 int bpf_prog_array_copy_info(struct bpf_prog_array *array,
1079 u32 *prog_ids, u32 request_cnt,
1081 int bpf_prog_array_copy(struct bpf_prog_array *old_array,
1082 struct bpf_prog *exclude_prog,
1083 struct bpf_prog *include_prog,
1084 struct bpf_prog_array **new_array);
1086 /* BPF program asks to bypass CAP_NET_BIND_SERVICE in bind. */
1087 #define BPF_RET_BIND_NO_CAP_NET_BIND_SERVICE (1 << 0)
1088 /* BPF program asks to set CN on the packet. */
1089 #define BPF_RET_SET_CN (1 << 0)
1091 #define BPF_PROG_RUN_ARRAY_FLAGS(array, ctx, func, ret_flags) \
1093 struct bpf_prog_array_item *_item; \
1094 struct bpf_prog *_prog; \
1095 struct bpf_prog_array *_array; \
1098 migrate_disable(); \
1100 _array = rcu_dereference(array); \
1101 _item = &_array->items[0]; \
1102 while ((_prog = READ_ONCE(_item->prog))) { \
1103 bpf_cgroup_storage_set(_item->cgroup_storage); \
1104 func_ret = func(_prog, ctx); \
1105 _ret &= (func_ret & 1); \
1106 *(ret_flags) |= (func_ret >> 1); \
1109 rcu_read_unlock(); \
1114 #define __BPF_PROG_RUN_ARRAY(array, ctx, func, check_non_null, set_cg_storage) \
1116 struct bpf_prog_array_item *_item; \
1117 struct bpf_prog *_prog; \
1118 struct bpf_prog_array *_array; \
1120 migrate_disable(); \
1122 _array = rcu_dereference(array); \
1123 if (unlikely(check_non_null && !_array))\
1125 _item = &_array->items[0]; \
1126 while ((_prog = READ_ONCE(_item->prog))) { \
1127 if (set_cg_storage) \
1128 bpf_cgroup_storage_set(_item->cgroup_storage); \
1129 _ret &= func(_prog, ctx); \
1133 rcu_read_unlock(); \
1138 /* To be used by __cgroup_bpf_run_filter_skb for EGRESS BPF progs
1139 * so BPF programs can request cwr for TCP packets.
1141 * Current cgroup skb programs can only return 0 or 1 (0 to drop the
1142 * packet. This macro changes the behavior so the low order bit
1143 * indicates whether the packet should be dropped (0) or not (1)
1144 * and the next bit is a congestion notification bit. This could be
1145 * used by TCP to call tcp_enter_cwr()
1147 * Hence, new allowed return values of CGROUP EGRESS BPF programs are:
1150 * 2: drop packet and cn
1151 * 3: keep packet and cn
1153 * This macro then converts it to one of the NET_XMIT or an error
1154 * code that is then interpreted as drop packet (and no cn):
1155 * 0: NET_XMIT_SUCCESS skb should be transmitted
1156 * 1: NET_XMIT_DROP skb should be dropped and cn
1157 * 2: NET_XMIT_CN skb should be transmitted and cn
1158 * 3: -EPERM skb should be dropped
1160 #define BPF_PROG_CGROUP_INET_EGRESS_RUN_ARRAY(array, ctx, func) \
1165 _ret = BPF_PROG_RUN_ARRAY_FLAGS(array, ctx, func, &_flags); \
1166 _cn = _flags & BPF_RET_SET_CN; \
1168 _ret = (_cn ? NET_XMIT_CN : NET_XMIT_SUCCESS); \
1170 _ret = (_cn ? NET_XMIT_DROP : -EPERM); \
1174 #define BPF_PROG_RUN_ARRAY(array, ctx, func) \
1175 __BPF_PROG_RUN_ARRAY(array, ctx, func, false, true)
1177 #define BPF_PROG_RUN_ARRAY_CHECK(array, ctx, func) \
1178 __BPF_PROG_RUN_ARRAY(array, ctx, func, true, false)
1180 #ifdef CONFIG_BPF_SYSCALL
1181 DECLARE_PER_CPU(int, bpf_prog_active);
1182 extern struct mutex bpf_stats_enabled_mutex;
1185 * Block execution of BPF programs attached to instrumentation (perf,
1186 * kprobes, tracepoints) to prevent deadlocks on map operations as any of
1187 * these events can happen inside a region which holds a map bucket lock
1188 * and can deadlock on it.
1190 * Use the preemption safe inc/dec variants on RT because migrate disable
1191 * is preemptible on RT and preemption in the middle of the RMW operation
1192 * might lead to inconsistent state. Use the raw variants for non RT
1193 * kernels as migrate_disable() maps to preempt_disable() so the slightly
1194 * more expensive save operation can be avoided.
1196 static inline void bpf_disable_instrumentation(void)
1199 if (IS_ENABLED(CONFIG_PREEMPT_RT))
1200 this_cpu_inc(bpf_prog_active);
1202 __this_cpu_inc(bpf_prog_active);
1205 static inline void bpf_enable_instrumentation(void)
1207 if (IS_ENABLED(CONFIG_PREEMPT_RT))
1208 this_cpu_dec(bpf_prog_active);
1210 __this_cpu_dec(bpf_prog_active);
1214 extern const struct file_operations bpf_map_fops;
1215 extern const struct file_operations bpf_prog_fops;
1216 extern const struct file_operations bpf_iter_fops;
1218 #define BPF_PROG_TYPE(_id, _name, prog_ctx_type, kern_ctx_type) \
1219 extern const struct bpf_prog_ops _name ## _prog_ops; \
1220 extern const struct bpf_verifier_ops _name ## _verifier_ops;
1221 #define BPF_MAP_TYPE(_id, _ops) \
1222 extern const struct bpf_map_ops _ops;
1223 #define BPF_LINK_TYPE(_id, _name)
1224 #include <linux/bpf_types.h>
1225 #undef BPF_PROG_TYPE
1227 #undef BPF_LINK_TYPE
1229 extern const struct bpf_prog_ops bpf_offload_prog_ops;
1230 extern const struct bpf_verifier_ops tc_cls_act_analyzer_ops;
1231 extern const struct bpf_verifier_ops xdp_analyzer_ops;
1233 struct bpf_prog *bpf_prog_get(u32 ufd);
1234 struct bpf_prog *bpf_prog_get_type_dev(u32 ufd, enum bpf_prog_type type,
1236 void bpf_prog_add(struct bpf_prog *prog, int i);
1237 void bpf_prog_sub(struct bpf_prog *prog, int i);
1238 void bpf_prog_inc(struct bpf_prog *prog);
1239 struct bpf_prog * __must_check bpf_prog_inc_not_zero(struct bpf_prog *prog);
1240 void bpf_prog_put(struct bpf_prog *prog);
1242 void bpf_prog_free_id(struct bpf_prog *prog, bool do_idr_lock);
1243 void bpf_map_free_id(struct bpf_map *map, bool do_idr_lock);
1245 struct bpf_map *bpf_map_get(u32 ufd);
1246 struct bpf_map *bpf_map_get_with_uref(u32 ufd);
1247 struct bpf_map *__bpf_map_get(struct fd f);
1248 void bpf_map_inc(struct bpf_map *map);
1249 void bpf_map_inc_with_uref(struct bpf_map *map);
1250 struct bpf_map * __must_check bpf_map_inc_not_zero(struct bpf_map *map);
1251 void bpf_map_put_with_uref(struct bpf_map *map);
1252 void bpf_map_put(struct bpf_map *map);
1253 void *bpf_map_area_alloc(u64 size, int numa_node);
1254 void *bpf_map_area_mmapable_alloc(u64 size, int numa_node);
1255 void bpf_map_area_free(void *base);
1256 void bpf_map_init_from_attr(struct bpf_map *map, union bpf_attr *attr);
1257 int generic_map_lookup_batch(struct bpf_map *map,
1258 const union bpf_attr *attr,
1259 union bpf_attr __user *uattr);
1260 int generic_map_update_batch(struct bpf_map *map,
1261 const union bpf_attr *attr,
1262 union bpf_attr __user *uattr);
1263 int generic_map_delete_batch(struct bpf_map *map,
1264 const union bpf_attr *attr,
1265 union bpf_attr __user *uattr);
1266 struct bpf_map *bpf_map_get_curr_or_next(u32 *id);
1267 struct bpf_prog *bpf_prog_get_curr_or_next(u32 *id);
1269 #ifdef CONFIG_MEMCG_KMEM
1270 void *bpf_map_kmalloc_node(const struct bpf_map *map, size_t size, gfp_t flags,
1272 void *bpf_map_kzalloc(const struct bpf_map *map, size_t size, gfp_t flags);
1273 void __percpu *bpf_map_alloc_percpu(const struct bpf_map *map, size_t size,
1274 size_t align, gfp_t flags);
1276 static inline void *
1277 bpf_map_kmalloc_node(const struct bpf_map *map, size_t size, gfp_t flags,
1280 return kmalloc_node(size, flags, node);
1283 static inline void *
1284 bpf_map_kzalloc(const struct bpf_map *map, size_t size, gfp_t flags)
1286 return kzalloc(size, flags);
1289 static inline void __percpu *
1290 bpf_map_alloc_percpu(const struct bpf_map *map, size_t size, size_t align,
1293 return __alloc_percpu_gfp(size, align, flags);
1297 extern int sysctl_unprivileged_bpf_disabled;
1299 static inline bool bpf_allow_ptr_leaks(void)
1301 return perfmon_capable();
1304 static inline bool bpf_allow_uninit_stack(void)
1306 return perfmon_capable();
1309 static inline bool bpf_allow_ptr_to_map_access(void)
1311 return perfmon_capable();
1314 static inline bool bpf_bypass_spec_v1(void)
1316 return perfmon_capable();
1319 static inline bool bpf_bypass_spec_v4(void)
1321 return perfmon_capable();
1324 int bpf_map_new_fd(struct bpf_map *map, int flags);
1325 int bpf_prog_new_fd(struct bpf_prog *prog);
1327 void bpf_link_init(struct bpf_link *link, enum bpf_link_type type,
1328 const struct bpf_link_ops *ops, struct bpf_prog *prog);
1329 int bpf_link_prime(struct bpf_link *link, struct bpf_link_primer *primer);
1330 int bpf_link_settle(struct bpf_link_primer *primer);
1331 void bpf_link_cleanup(struct bpf_link_primer *primer);
1332 void bpf_link_inc(struct bpf_link *link);
1333 void bpf_link_put(struct bpf_link *link);
1334 int bpf_link_new_fd(struct bpf_link *link);
1335 struct file *bpf_link_new_file(struct bpf_link *link, int *reserved_fd);
1336 struct bpf_link *bpf_link_get_from_fd(u32 ufd);
1338 int bpf_obj_pin_user(u32 ufd, const char __user *pathname);
1339 int bpf_obj_get_user(const char __user *pathname, int flags);
1341 #define BPF_ITER_FUNC_PREFIX "bpf_iter_"
1342 #define DEFINE_BPF_ITER_FUNC(target, args...) \
1343 extern int bpf_iter_ ## target(args); \
1344 int __init bpf_iter_ ## target(args) { return 0; }
1346 struct bpf_iter_aux_info {
1347 struct bpf_map *map;
1350 typedef int (*bpf_iter_attach_target_t)(struct bpf_prog *prog,
1351 union bpf_iter_link_info *linfo,
1352 struct bpf_iter_aux_info *aux);
1353 typedef void (*bpf_iter_detach_target_t)(struct bpf_iter_aux_info *aux);
1354 typedef void (*bpf_iter_show_fdinfo_t) (const struct bpf_iter_aux_info *aux,
1355 struct seq_file *seq);
1356 typedef int (*bpf_iter_fill_link_info_t)(const struct bpf_iter_aux_info *aux,
1357 struct bpf_link_info *info);
1359 enum bpf_iter_feature {
1360 BPF_ITER_RESCHED = BIT(0),
1363 #define BPF_ITER_CTX_ARG_MAX 2
1364 struct bpf_iter_reg {
1366 bpf_iter_attach_target_t attach_target;
1367 bpf_iter_detach_target_t detach_target;
1368 bpf_iter_show_fdinfo_t show_fdinfo;
1369 bpf_iter_fill_link_info_t fill_link_info;
1370 u32 ctx_arg_info_size;
1372 struct bpf_ctx_arg_aux ctx_arg_info[BPF_ITER_CTX_ARG_MAX];
1373 const struct bpf_iter_seq_info *seq_info;
1376 struct bpf_iter_meta {
1377 __bpf_md_ptr(struct seq_file *, seq);
1382 struct bpf_iter__bpf_map_elem {
1383 __bpf_md_ptr(struct bpf_iter_meta *, meta);
1384 __bpf_md_ptr(struct bpf_map *, map);
1385 __bpf_md_ptr(void *, key);
1386 __bpf_md_ptr(void *, value);
1389 int bpf_iter_reg_target(const struct bpf_iter_reg *reg_info);
1390 void bpf_iter_unreg_target(const struct bpf_iter_reg *reg_info);
1391 bool bpf_iter_prog_supported(struct bpf_prog *prog);
1392 int bpf_iter_link_attach(const union bpf_attr *attr, struct bpf_prog *prog);
1393 int bpf_iter_new_fd(struct bpf_link *link);
1394 bool bpf_link_is_iter(struct bpf_link *link);
1395 struct bpf_prog *bpf_iter_get_info(struct bpf_iter_meta *meta, bool in_stop);
1396 int bpf_iter_run_prog(struct bpf_prog *prog, void *ctx);
1397 void bpf_iter_map_show_fdinfo(const struct bpf_iter_aux_info *aux,
1398 struct seq_file *seq);
1399 int bpf_iter_map_fill_link_info(const struct bpf_iter_aux_info *aux,
1400 struct bpf_link_info *info);
1402 int bpf_percpu_hash_copy(struct bpf_map *map, void *key, void *value);
1403 int bpf_percpu_array_copy(struct bpf_map *map, void *key, void *value);
1404 int bpf_percpu_hash_update(struct bpf_map *map, void *key, void *value,
1406 int bpf_percpu_array_update(struct bpf_map *map, void *key, void *value,
1409 int bpf_stackmap_copy(struct bpf_map *map, void *key, void *value);
1411 int bpf_fd_array_map_update_elem(struct bpf_map *map, struct file *map_file,
1412 void *key, void *value, u64 map_flags);
1413 int bpf_fd_array_map_lookup_elem(struct bpf_map *map, void *key, u32 *value);
1414 int bpf_fd_htab_map_update_elem(struct bpf_map *map, struct file *map_file,
1415 void *key, void *value, u64 map_flags);
1416 int bpf_fd_htab_map_lookup_elem(struct bpf_map *map, void *key, u32 *value);
1418 int bpf_get_file_flag(int flags);
1419 int bpf_check_uarg_tail_zero(void __user *uaddr, size_t expected_size,
1420 size_t actual_size);
1422 /* memcpy that is used with 8-byte aligned pointers, power-of-8 size and
1423 * forced to use 'long' read/writes to try to atomically copy long counters.
1424 * Best-effort only. No barriers here, since it _will_ race with concurrent
1425 * updates from BPF programs. Called from bpf syscall and mostly used with
1426 * size 8 or 16 bytes, so ask compiler to inline it.
1428 static inline void bpf_long_memcpy(void *dst, const void *src, u32 size)
1430 const long *lsrc = src;
1433 size /= sizeof(long);
1438 /* verify correctness of eBPF program */
1439 int bpf_check(struct bpf_prog **fp, union bpf_attr *attr,
1440 union bpf_attr __user *uattr);
1442 #ifndef CONFIG_BPF_JIT_ALWAYS_ON
1443 void bpf_patch_call_args(struct bpf_insn *insn, u32 stack_depth);
1446 struct btf *bpf_get_btf_vmlinux(void);
1452 struct bpf_dtab_netdev *__dev_map_lookup_elem(struct bpf_map *map, u32 key);
1453 struct bpf_dtab_netdev *__dev_map_hash_lookup_elem(struct bpf_map *map, u32 key);
1454 void __dev_flush(void);
1455 int dev_xdp_enqueue(struct net_device *dev, struct xdp_buff *xdp,
1456 struct net_device *dev_rx);
1457 int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp,
1458 struct net_device *dev_rx);
1459 int dev_map_generic_redirect(struct bpf_dtab_netdev *dst, struct sk_buff *skb,
1460 struct bpf_prog *xdp_prog);
1461 bool dev_map_can_have_prog(struct bpf_map *map);
1463 struct bpf_cpu_map_entry *__cpu_map_lookup_elem(struct bpf_map *map, u32 key);
1464 void __cpu_map_flush(void);
1465 int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu, struct xdp_buff *xdp,
1466 struct net_device *dev_rx);
1467 bool cpu_map_prog_allowed(struct bpf_map *map);
1469 /* Return map's numa specified by userspace */
1470 static inline int bpf_map_attr_numa_node(const union bpf_attr *attr)
1472 return (attr->map_flags & BPF_F_NUMA_NODE) ?
1473 attr->numa_node : NUMA_NO_NODE;
1476 struct bpf_prog *bpf_prog_get_type_path(const char *name, enum bpf_prog_type type);
1477 int array_map_alloc_check(union bpf_attr *attr);
1479 int bpf_prog_test_run_xdp(struct bpf_prog *prog, const union bpf_attr *kattr,
1480 union bpf_attr __user *uattr);
1481 int bpf_prog_test_run_skb(struct bpf_prog *prog, const union bpf_attr *kattr,
1482 union bpf_attr __user *uattr);
1483 int bpf_prog_test_run_tracing(struct bpf_prog *prog,
1484 const union bpf_attr *kattr,
1485 union bpf_attr __user *uattr);
1486 int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog,
1487 const union bpf_attr *kattr,
1488 union bpf_attr __user *uattr);
1489 int bpf_prog_test_run_raw_tp(struct bpf_prog *prog,
1490 const union bpf_attr *kattr,
1491 union bpf_attr __user *uattr);
1492 bool btf_ctx_access(int off, int size, enum bpf_access_type type,
1493 const struct bpf_prog *prog,
1494 struct bpf_insn_access_aux *info);
1495 int btf_struct_access(struct bpf_verifier_log *log, const struct btf *btf,
1496 const struct btf_type *t, int off, int size,
1497 enum bpf_access_type atype,
1499 bool btf_struct_ids_match(struct bpf_verifier_log *log,
1500 const struct btf *btf, u32 id, int off,
1501 const struct btf *need_btf, u32 need_type_id);
1503 int btf_distill_func_proto(struct bpf_verifier_log *log,
1505 const struct btf_type *func_proto,
1506 const char *func_name,
1507 struct btf_func_model *m);
1509 struct bpf_reg_state;
1510 int btf_check_func_arg_match(struct bpf_verifier_env *env, int subprog,
1511 struct bpf_reg_state *regs);
1512 int btf_prepare_func_args(struct bpf_verifier_env *env, int subprog,
1513 struct bpf_reg_state *reg);
1514 int btf_check_type_match(struct bpf_verifier_log *log, const struct bpf_prog *prog,
1515 struct btf *btf, const struct btf_type *t);
1517 struct bpf_prog *bpf_prog_by_id(u32 id);
1518 struct bpf_link *bpf_link_by_id(u32 id);
1520 const struct bpf_func_proto *bpf_base_func_proto(enum bpf_func_id func_id);
1521 #else /* !CONFIG_BPF_SYSCALL */
1522 static inline struct bpf_prog *bpf_prog_get(u32 ufd)
1524 return ERR_PTR(-EOPNOTSUPP);
1527 static inline struct bpf_prog *bpf_prog_get_type_dev(u32 ufd,
1528 enum bpf_prog_type type,
1531 return ERR_PTR(-EOPNOTSUPP);
1534 static inline void bpf_prog_add(struct bpf_prog *prog, int i)
1538 static inline void bpf_prog_sub(struct bpf_prog *prog, int i)
1542 static inline void bpf_prog_put(struct bpf_prog *prog)
1546 static inline void bpf_prog_inc(struct bpf_prog *prog)
1550 static inline struct bpf_prog *__must_check
1551 bpf_prog_inc_not_zero(struct bpf_prog *prog)
1553 return ERR_PTR(-EOPNOTSUPP);
1556 static inline void bpf_link_init(struct bpf_link *link, enum bpf_link_type type,
1557 const struct bpf_link_ops *ops,
1558 struct bpf_prog *prog)
1562 static inline int bpf_link_prime(struct bpf_link *link,
1563 struct bpf_link_primer *primer)
1568 static inline int bpf_link_settle(struct bpf_link_primer *primer)
1573 static inline void bpf_link_cleanup(struct bpf_link_primer *primer)
1577 static inline void bpf_link_inc(struct bpf_link *link)
1581 static inline void bpf_link_put(struct bpf_link *link)
1585 static inline int bpf_obj_get_user(const char __user *pathname, int flags)
1590 static inline struct net_device *__dev_map_lookup_elem(struct bpf_map *map,
1596 static inline struct net_device *__dev_map_hash_lookup_elem(struct bpf_map *map,
1601 static inline bool dev_map_can_have_prog(struct bpf_map *map)
1606 static inline void __dev_flush(void)
1611 struct bpf_dtab_netdev;
1614 int dev_xdp_enqueue(struct net_device *dev, struct xdp_buff *xdp,
1615 struct net_device *dev_rx)
1621 int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp,
1622 struct net_device *dev_rx)
1629 static inline int dev_map_generic_redirect(struct bpf_dtab_netdev *dst,
1630 struct sk_buff *skb,
1631 struct bpf_prog *xdp_prog)
1637 struct bpf_cpu_map_entry *__cpu_map_lookup_elem(struct bpf_map *map, u32 key)
1642 static inline void __cpu_map_flush(void)
1646 static inline int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu,
1647 struct xdp_buff *xdp,
1648 struct net_device *dev_rx)
1653 static inline bool cpu_map_prog_allowed(struct bpf_map *map)
1658 static inline struct bpf_prog *bpf_prog_get_type_path(const char *name,
1659 enum bpf_prog_type type)
1661 return ERR_PTR(-EOPNOTSUPP);
1664 static inline int bpf_prog_test_run_xdp(struct bpf_prog *prog,
1665 const union bpf_attr *kattr,
1666 union bpf_attr __user *uattr)
1671 static inline int bpf_prog_test_run_skb(struct bpf_prog *prog,
1672 const union bpf_attr *kattr,
1673 union bpf_attr __user *uattr)
1678 static inline int bpf_prog_test_run_tracing(struct bpf_prog *prog,
1679 const union bpf_attr *kattr,
1680 union bpf_attr __user *uattr)
1685 static inline int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog,
1686 const union bpf_attr *kattr,
1687 union bpf_attr __user *uattr)
1692 static inline void bpf_map_put(struct bpf_map *map)
1696 static inline struct bpf_prog *bpf_prog_by_id(u32 id)
1698 return ERR_PTR(-ENOTSUPP);
1701 static inline const struct bpf_func_proto *
1702 bpf_base_func_proto(enum bpf_func_id func_id)
1706 #endif /* CONFIG_BPF_SYSCALL */
1708 void __bpf_free_used_btfs(struct bpf_prog_aux *aux,
1709 struct btf_mod_pair *used_btfs, u32 len);
1711 static inline struct bpf_prog *bpf_prog_get_type(u32 ufd,
1712 enum bpf_prog_type type)
1714 return bpf_prog_get_type_dev(ufd, type, false);
1717 void __bpf_free_used_maps(struct bpf_prog_aux *aux,
1718 struct bpf_map **used_maps, u32 len);
1720 bool bpf_prog_get_ok(struct bpf_prog *, enum bpf_prog_type *, bool);
1722 int bpf_prog_offload_compile(struct bpf_prog *prog);
1723 void bpf_prog_offload_destroy(struct bpf_prog *prog);
1724 int bpf_prog_offload_info_fill(struct bpf_prog_info *info,
1725 struct bpf_prog *prog);
1727 int bpf_map_offload_info_fill(struct bpf_map_info *info, struct bpf_map *map);
1729 int bpf_map_offload_lookup_elem(struct bpf_map *map, void *key, void *value);
1730 int bpf_map_offload_update_elem(struct bpf_map *map,
1731 void *key, void *value, u64 flags);
1732 int bpf_map_offload_delete_elem(struct bpf_map *map, void *key);
1733 int bpf_map_offload_get_next_key(struct bpf_map *map,
1734 void *key, void *next_key);
1736 bool bpf_offload_prog_map_match(struct bpf_prog *prog, struct bpf_map *map);
1738 struct bpf_offload_dev *
1739 bpf_offload_dev_create(const struct bpf_prog_offload_ops *ops, void *priv);
1740 void bpf_offload_dev_destroy(struct bpf_offload_dev *offdev);
1741 void *bpf_offload_dev_priv(struct bpf_offload_dev *offdev);
1742 int bpf_offload_dev_netdev_register(struct bpf_offload_dev *offdev,
1743 struct net_device *netdev);
1744 void bpf_offload_dev_netdev_unregister(struct bpf_offload_dev *offdev,
1745 struct net_device *netdev);
1746 bool bpf_offload_dev_match(struct bpf_prog *prog, struct net_device *netdev);
1748 #if defined(CONFIG_NET) && defined(CONFIG_BPF_SYSCALL)
1749 int bpf_prog_offload_init(struct bpf_prog *prog, union bpf_attr *attr);
1751 static inline bool bpf_prog_is_dev_bound(const struct bpf_prog_aux *aux)
1753 return aux->offload_requested;
1756 static inline bool bpf_map_is_dev_bound(struct bpf_map *map)
1758 return unlikely(map->ops == &bpf_map_offload_ops);
1761 struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr);
1762 void bpf_map_offload_map_free(struct bpf_map *map);
1764 static inline int bpf_prog_offload_init(struct bpf_prog *prog,
1765 union bpf_attr *attr)
1770 static inline bool bpf_prog_is_dev_bound(struct bpf_prog_aux *aux)
1775 static inline bool bpf_map_is_dev_bound(struct bpf_map *map)
1780 static inline struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr)
1782 return ERR_PTR(-EOPNOTSUPP);
1785 static inline void bpf_map_offload_map_free(struct bpf_map *map)
1788 #endif /* CONFIG_NET && CONFIG_BPF_SYSCALL */
1790 #if defined(CONFIG_BPF_STREAM_PARSER)
1791 int sock_map_prog_update(struct bpf_map *map, struct bpf_prog *prog,
1792 struct bpf_prog *old, u32 which);
1793 int sock_map_get_from_fd(const union bpf_attr *attr, struct bpf_prog *prog);
1794 int sock_map_prog_detach(const union bpf_attr *attr, enum bpf_prog_type ptype);
1795 int sock_map_update_elem_sys(struct bpf_map *map, void *key, void *value, u64 flags);
1796 void sock_map_unhash(struct sock *sk);
1797 void sock_map_close(struct sock *sk, long timeout);
1799 static inline int sock_map_prog_update(struct bpf_map *map,
1800 struct bpf_prog *prog,
1801 struct bpf_prog *old, u32 which)
1806 static inline int sock_map_get_from_fd(const union bpf_attr *attr,
1807 struct bpf_prog *prog)
1812 static inline int sock_map_prog_detach(const union bpf_attr *attr,
1813 enum bpf_prog_type ptype)
1818 static inline int sock_map_update_elem_sys(struct bpf_map *map, void *key, void *value,
1823 #endif /* CONFIG_BPF_STREAM_PARSER */
1825 #if defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL)
1826 void bpf_sk_reuseport_detach(struct sock *sk);
1827 int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map, void *key,
1829 int bpf_fd_reuseport_array_update_elem(struct bpf_map *map, void *key,
1830 void *value, u64 map_flags);
1832 static inline void bpf_sk_reuseport_detach(struct sock *sk)
1836 #ifdef CONFIG_BPF_SYSCALL
1837 static inline int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map,
1838 void *key, void *value)
1843 static inline int bpf_fd_reuseport_array_update_elem(struct bpf_map *map,
1844 void *key, void *value,
1849 #endif /* CONFIG_BPF_SYSCALL */
1850 #endif /* defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL) */
1852 /* verifier prototypes for helper functions called from eBPF programs */
1853 extern const struct bpf_func_proto bpf_map_lookup_elem_proto;
1854 extern const struct bpf_func_proto bpf_map_update_elem_proto;
1855 extern const struct bpf_func_proto bpf_map_delete_elem_proto;
1856 extern const struct bpf_func_proto bpf_map_push_elem_proto;
1857 extern const struct bpf_func_proto bpf_map_pop_elem_proto;
1858 extern const struct bpf_func_proto bpf_map_peek_elem_proto;
1860 extern const struct bpf_func_proto bpf_get_prandom_u32_proto;
1861 extern const struct bpf_func_proto bpf_get_smp_processor_id_proto;
1862 extern const struct bpf_func_proto bpf_get_numa_node_id_proto;
1863 extern const struct bpf_func_proto bpf_tail_call_proto;
1864 extern const struct bpf_func_proto bpf_ktime_get_ns_proto;
1865 extern const struct bpf_func_proto bpf_ktime_get_boot_ns_proto;
1866 extern const struct bpf_func_proto bpf_get_current_pid_tgid_proto;
1867 extern const struct bpf_func_proto bpf_get_current_uid_gid_proto;
1868 extern const struct bpf_func_proto bpf_get_current_comm_proto;
1869 extern const struct bpf_func_proto bpf_get_stackid_proto;
1870 extern const struct bpf_func_proto bpf_get_stack_proto;
1871 extern const struct bpf_func_proto bpf_get_task_stack_proto;
1872 extern const struct bpf_func_proto bpf_get_stackid_proto_pe;
1873 extern const struct bpf_func_proto bpf_get_stack_proto_pe;
1874 extern const struct bpf_func_proto bpf_sock_map_update_proto;
1875 extern const struct bpf_func_proto bpf_sock_hash_update_proto;
1876 extern const struct bpf_func_proto bpf_get_current_cgroup_id_proto;
1877 extern const struct bpf_func_proto bpf_get_current_ancestor_cgroup_id_proto;
1878 extern const struct bpf_func_proto bpf_msg_redirect_hash_proto;
1879 extern const struct bpf_func_proto bpf_msg_redirect_map_proto;
1880 extern const struct bpf_func_proto bpf_sk_redirect_hash_proto;
1881 extern const struct bpf_func_proto bpf_sk_redirect_map_proto;
1882 extern const struct bpf_func_proto bpf_spin_lock_proto;
1883 extern const struct bpf_func_proto bpf_spin_unlock_proto;
1884 extern const struct bpf_func_proto bpf_get_local_storage_proto;
1885 extern const struct bpf_func_proto bpf_strtol_proto;
1886 extern const struct bpf_func_proto bpf_strtoul_proto;
1887 extern const struct bpf_func_proto bpf_tcp_sock_proto;
1888 extern const struct bpf_func_proto bpf_jiffies64_proto;
1889 extern const struct bpf_func_proto bpf_get_ns_current_pid_tgid_proto;
1890 extern const struct bpf_func_proto bpf_event_output_data_proto;
1891 extern const struct bpf_func_proto bpf_ringbuf_output_proto;
1892 extern const struct bpf_func_proto bpf_ringbuf_reserve_proto;
1893 extern const struct bpf_func_proto bpf_ringbuf_submit_proto;
1894 extern const struct bpf_func_proto bpf_ringbuf_discard_proto;
1895 extern const struct bpf_func_proto bpf_ringbuf_query_proto;
1896 extern const struct bpf_func_proto bpf_skc_to_tcp6_sock_proto;
1897 extern const struct bpf_func_proto bpf_skc_to_tcp_sock_proto;
1898 extern const struct bpf_func_proto bpf_skc_to_tcp_timewait_sock_proto;
1899 extern const struct bpf_func_proto bpf_skc_to_tcp_request_sock_proto;
1900 extern const struct bpf_func_proto bpf_skc_to_udp6_sock_proto;
1901 extern const struct bpf_func_proto bpf_copy_from_user_proto;
1902 extern const struct bpf_func_proto bpf_snprintf_btf_proto;
1903 extern const struct bpf_func_proto bpf_per_cpu_ptr_proto;
1904 extern const struct bpf_func_proto bpf_this_cpu_ptr_proto;
1905 extern const struct bpf_func_proto bpf_ktime_get_coarse_ns_proto;
1906 extern const struct bpf_func_proto bpf_sock_from_file_proto;
1907 extern const struct bpf_func_proto bpf_get_socket_ptr_cookie_proto;
1909 const struct bpf_func_proto *bpf_tracing_func_proto(
1910 enum bpf_func_id func_id, const struct bpf_prog *prog);
1912 const struct bpf_func_proto *tracing_prog_func_proto(
1913 enum bpf_func_id func_id, const struct bpf_prog *prog);
1915 /* Shared helpers among cBPF and eBPF. */
1916 void bpf_user_rnd_init_once(void);
1917 u64 bpf_user_rnd_u32(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
1918 u64 bpf_get_raw_cpu_id(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
1920 #if defined(CONFIG_NET)
1921 bool bpf_sock_common_is_valid_access(int off, int size,
1922 enum bpf_access_type type,
1923 struct bpf_insn_access_aux *info);
1924 bool bpf_sock_is_valid_access(int off, int size, enum bpf_access_type type,
1925 struct bpf_insn_access_aux *info);
1926 u32 bpf_sock_convert_ctx_access(enum bpf_access_type type,
1927 const struct bpf_insn *si,
1928 struct bpf_insn *insn_buf,
1929 struct bpf_prog *prog,
1932 static inline bool bpf_sock_common_is_valid_access(int off, int size,
1933 enum bpf_access_type type,
1934 struct bpf_insn_access_aux *info)
1938 static inline bool bpf_sock_is_valid_access(int off, int size,
1939 enum bpf_access_type type,
1940 struct bpf_insn_access_aux *info)
1944 static inline u32 bpf_sock_convert_ctx_access(enum bpf_access_type type,
1945 const struct bpf_insn *si,
1946 struct bpf_insn *insn_buf,
1947 struct bpf_prog *prog,
1955 struct sk_reuseport_kern {
1956 struct sk_buff *skb;
1958 struct sock *selected_sk;
1964 bool bpf_tcp_sock_is_valid_access(int off, int size, enum bpf_access_type type,
1965 struct bpf_insn_access_aux *info);
1967 u32 bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type,
1968 const struct bpf_insn *si,
1969 struct bpf_insn *insn_buf,
1970 struct bpf_prog *prog,
1973 bool bpf_xdp_sock_is_valid_access(int off, int size, enum bpf_access_type type,
1974 struct bpf_insn_access_aux *info);
1976 u32 bpf_xdp_sock_convert_ctx_access(enum bpf_access_type type,
1977 const struct bpf_insn *si,
1978 struct bpf_insn *insn_buf,
1979 struct bpf_prog *prog,
1982 static inline bool bpf_tcp_sock_is_valid_access(int off, int size,
1983 enum bpf_access_type type,
1984 struct bpf_insn_access_aux *info)
1989 static inline u32 bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type,
1990 const struct bpf_insn *si,
1991 struct bpf_insn *insn_buf,
1992 struct bpf_prog *prog,
1997 static inline bool bpf_xdp_sock_is_valid_access(int off, int size,
1998 enum bpf_access_type type,
1999 struct bpf_insn_access_aux *info)
2004 static inline u32 bpf_xdp_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,
2012 #endif /* CONFIG_INET */
2014 enum bpf_text_poke_type {
2019 int bpf_arch_text_poke(void *ip, enum bpf_text_poke_type t,
2020 void *addr1, void *addr2);
2023 bool btf_id_set_contains(const struct btf_id_set *set, u32 id);
2025 #endif /* _LINUX_BPF_H */