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/u64_stats_sync.h>
18 #include <linux/refcount.h>
19 #include <linux/mutex.h>
20 #include <linux/module.h>
22 struct bpf_verifier_env;
23 struct bpf_verifier_log;
32 struct exception_table_entry;
34 extern struct idr btf_idr;
35 extern spinlock_t btf_idr_lock;
37 /* map is generic key/value storage optionally accesible by eBPF programs */
39 /* funcs callable from userspace (via syscall) */
40 int (*map_alloc_check)(union bpf_attr *attr);
41 struct bpf_map *(*map_alloc)(union bpf_attr *attr);
42 void (*map_release)(struct bpf_map *map, struct file *map_file);
43 void (*map_free)(struct bpf_map *map);
44 int (*map_get_next_key)(struct bpf_map *map, void *key, void *next_key);
45 void (*map_release_uref)(struct bpf_map *map);
46 void *(*map_lookup_elem_sys_only)(struct bpf_map *map, void *key);
47 int (*map_lookup_batch)(struct bpf_map *map, const union bpf_attr *attr,
48 union bpf_attr __user *uattr);
49 int (*map_lookup_and_delete_batch)(struct bpf_map *map,
50 const union bpf_attr *attr,
51 union bpf_attr __user *uattr);
52 int (*map_update_batch)(struct bpf_map *map, const union bpf_attr *attr,
53 union bpf_attr __user *uattr);
54 int (*map_delete_batch)(struct bpf_map *map, const union bpf_attr *attr,
55 union bpf_attr __user *uattr);
57 /* funcs callable from userspace and from eBPF programs */
58 void *(*map_lookup_elem)(struct bpf_map *map, void *key);
59 int (*map_update_elem)(struct bpf_map *map, void *key, void *value, u64 flags);
60 int (*map_delete_elem)(struct bpf_map *map, void *key);
61 int (*map_push_elem)(struct bpf_map *map, void *value, u64 flags);
62 int (*map_pop_elem)(struct bpf_map *map, void *value);
63 int (*map_peek_elem)(struct bpf_map *map, void *value);
65 /* funcs called by prog_array and perf_event_array map */
66 void *(*map_fd_get_ptr)(struct bpf_map *map, struct file *map_file,
68 void (*map_fd_put_ptr)(void *ptr);
69 u32 (*map_gen_lookup)(struct bpf_map *map, struct bpf_insn *insn_buf);
70 u32 (*map_fd_sys_lookup_elem)(void *ptr);
71 void (*map_seq_show_elem)(struct bpf_map *map, void *key,
73 int (*map_check_btf)(const struct bpf_map *map,
74 const struct btf *btf,
75 const struct btf_type *key_type,
76 const struct btf_type *value_type);
78 /* Prog poke tracking helpers. */
79 int (*map_poke_track)(struct bpf_map *map, struct bpf_prog_aux *aux);
80 void (*map_poke_untrack)(struct bpf_map *map, struct bpf_prog_aux *aux);
81 void (*map_poke_run)(struct bpf_map *map, u32 key, struct bpf_prog *old,
82 struct bpf_prog *new);
84 /* Direct value access helpers. */
85 int (*map_direct_value_addr)(const struct bpf_map *map,
87 int (*map_direct_value_meta)(const struct bpf_map *map,
89 int (*map_mmap)(struct bpf_map *map, struct vm_area_struct *vma);
92 struct bpf_map_memory {
94 struct user_struct *user;
98 /* The first two cachelines with read-mostly members of which some
99 * are also accessed in fast-path (e.g. ops, max_entries).
101 const struct bpf_map_ops *ops ____cacheline_aligned;
102 struct bpf_map *inner_map_meta;
103 #ifdef CONFIG_SECURITY
106 enum bpf_map_type map_type;
111 int spin_lock_off; /* >=0 valid offset, <0 error */
115 u32 btf_value_type_id;
117 struct bpf_map_memory memory;
118 char name[BPF_OBJ_NAME_LEN];
119 u32 btf_vmlinux_value_type_id;
121 bool frozen; /* write-once; write-protected by freeze_mutex */
124 /* The 3rd and 4th cacheline with misc members to avoid false sharing
125 * particularly with refcounting.
127 atomic64_t refcnt ____cacheline_aligned;
129 struct work_struct work;
130 struct mutex freeze_mutex;
131 u64 writecnt; /* writable mmap cnt; protected by freeze_mutex */
134 static inline bool map_value_has_spin_lock(const struct bpf_map *map)
136 return map->spin_lock_off >= 0;
139 static inline void check_and_init_map_lock(struct bpf_map *map, void *dst)
141 if (likely(!map_value_has_spin_lock(map)))
143 *(struct bpf_spin_lock *)(dst + map->spin_lock_off) =
144 (struct bpf_spin_lock){};
147 /* copy everything but bpf_spin_lock */
148 static inline void copy_map_value(struct bpf_map *map, void *dst, void *src)
150 if (unlikely(map_value_has_spin_lock(map))) {
151 u32 off = map->spin_lock_off;
153 memcpy(dst, src, off);
154 memcpy(dst + off + sizeof(struct bpf_spin_lock),
155 src + off + sizeof(struct bpf_spin_lock),
156 map->value_size - off - sizeof(struct bpf_spin_lock));
158 memcpy(dst, src, map->value_size);
161 void copy_map_value_locked(struct bpf_map *map, void *dst, void *src,
164 struct bpf_offload_dev;
165 struct bpf_offloaded_map;
167 struct bpf_map_dev_ops {
168 int (*map_get_next_key)(struct bpf_offloaded_map *map,
169 void *key, void *next_key);
170 int (*map_lookup_elem)(struct bpf_offloaded_map *map,
171 void *key, void *value);
172 int (*map_update_elem)(struct bpf_offloaded_map *map,
173 void *key, void *value, u64 flags);
174 int (*map_delete_elem)(struct bpf_offloaded_map *map, void *key);
177 struct bpf_offloaded_map {
179 struct net_device *netdev;
180 const struct bpf_map_dev_ops *dev_ops;
182 struct list_head offloads;
185 static inline struct bpf_offloaded_map *map_to_offmap(struct bpf_map *map)
187 return container_of(map, struct bpf_offloaded_map, map);
190 static inline bool bpf_map_offload_neutral(const struct bpf_map *map)
192 return map->map_type == BPF_MAP_TYPE_PERF_EVENT_ARRAY;
195 static inline bool bpf_map_support_seq_show(const struct bpf_map *map)
197 return (map->btf_value_type_id || map->btf_vmlinux_value_type_id) &&
198 map->ops->map_seq_show_elem;
201 int map_check_no_btf(const struct bpf_map *map,
202 const struct btf *btf,
203 const struct btf_type *key_type,
204 const struct btf_type *value_type);
206 extern const struct bpf_map_ops bpf_map_offload_ops;
208 /* function argument constraints */
210 ARG_DONTCARE = 0, /* unused argument in helper function */
212 /* the following constraints used to prototype
213 * bpf_map_lookup/update/delete_elem() functions
215 ARG_CONST_MAP_PTR, /* const argument used as pointer to bpf_map */
216 ARG_PTR_TO_MAP_KEY, /* pointer to stack used as map key */
217 ARG_PTR_TO_MAP_VALUE, /* pointer to stack used as map value */
218 ARG_PTR_TO_UNINIT_MAP_VALUE, /* pointer to valid memory used to store a map value */
219 ARG_PTR_TO_MAP_VALUE_OR_NULL, /* pointer to stack used as map value or NULL */
221 /* the following constraints used to prototype bpf_memcmp() and other
222 * functions that access data on eBPF program stack
224 ARG_PTR_TO_MEM, /* pointer to valid memory (stack, packet, map value) */
225 ARG_PTR_TO_MEM_OR_NULL, /* pointer to valid memory or NULL */
226 ARG_PTR_TO_UNINIT_MEM, /* pointer to memory does not need to be initialized,
227 * helper function must fill all bytes or clear
228 * them in error case.
231 ARG_CONST_SIZE, /* number of bytes accessed from memory */
232 ARG_CONST_SIZE_OR_ZERO, /* number of bytes accessed from memory or 0 */
234 ARG_PTR_TO_CTX, /* pointer to context */
235 ARG_ANYTHING, /* any (initialized) argument is ok */
236 ARG_PTR_TO_SPIN_LOCK, /* pointer to bpf_spin_lock */
237 ARG_PTR_TO_SOCK_COMMON, /* pointer to sock_common */
238 ARG_PTR_TO_INT, /* pointer to int */
239 ARG_PTR_TO_LONG, /* pointer to long */
240 ARG_PTR_TO_SOCKET, /* pointer to bpf_sock (fullsock) */
241 ARG_PTR_TO_BTF_ID, /* pointer to in-kernel struct */
244 /* type of values returned from helper functions */
245 enum bpf_return_type {
246 RET_INTEGER, /* function returns integer */
247 RET_VOID, /* function doesn't return anything */
248 RET_PTR_TO_MAP_VALUE, /* returns a pointer to map elem value */
249 RET_PTR_TO_MAP_VALUE_OR_NULL, /* returns a pointer to map elem value or NULL */
250 RET_PTR_TO_SOCKET_OR_NULL, /* returns a pointer to a socket or NULL */
251 RET_PTR_TO_TCP_SOCK_OR_NULL, /* returns a pointer to a tcp_sock or NULL */
252 RET_PTR_TO_SOCK_COMMON_OR_NULL, /* returns a pointer to a sock_common or NULL */
255 /* eBPF function prototype used by verifier to allow BPF_CALLs from eBPF programs
256 * to in-kernel helper functions and for adjusting imm32 field in BPF_CALL
257 * instructions after verifying
259 struct bpf_func_proto {
260 u64 (*func)(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
263 enum bpf_return_type ret_type;
266 enum bpf_arg_type arg1_type;
267 enum bpf_arg_type arg2_type;
268 enum bpf_arg_type arg3_type;
269 enum bpf_arg_type arg4_type;
270 enum bpf_arg_type arg5_type;
272 enum bpf_arg_type arg_type[5];
274 int *btf_id; /* BTF ids of arguments */
277 /* bpf_context is intentionally undefined structure. Pointer to bpf_context is
278 * the first argument to eBPF programs.
279 * For socket filters: 'struct bpf_context *' == 'struct sk_buff *'
283 enum bpf_access_type {
288 /* types of values stored in eBPF registers */
289 /* Pointer types represent:
292 * pointer + (u16) var
293 * pointer + (u16) var + imm
294 * if (range > 0) then [ptr, ptr + range - off) is safe to access
295 * if (id > 0) means that some 'var' was added
296 * if (off > 0) means that 'imm' was added
299 NOT_INIT = 0, /* nothing was written into register */
300 SCALAR_VALUE, /* reg doesn't contain a valid pointer */
301 PTR_TO_CTX, /* reg points to bpf_context */
302 CONST_PTR_TO_MAP, /* reg points to struct bpf_map */
303 PTR_TO_MAP_VALUE, /* reg points to map element value */
304 PTR_TO_MAP_VALUE_OR_NULL,/* points to map elem value or NULL */
305 PTR_TO_STACK, /* reg == frame_pointer + offset */
306 PTR_TO_PACKET_META, /* skb->data - meta_len */
307 PTR_TO_PACKET, /* reg points to skb->data */
308 PTR_TO_PACKET_END, /* skb->data + headlen */
309 PTR_TO_FLOW_KEYS, /* reg points to bpf_flow_keys */
310 PTR_TO_SOCKET, /* reg points to struct bpf_sock */
311 PTR_TO_SOCKET_OR_NULL, /* reg points to struct bpf_sock or NULL */
312 PTR_TO_SOCK_COMMON, /* reg points to sock_common */
313 PTR_TO_SOCK_COMMON_OR_NULL, /* reg points to sock_common or NULL */
314 PTR_TO_TCP_SOCK, /* reg points to struct tcp_sock */
315 PTR_TO_TCP_SOCK_OR_NULL, /* reg points to struct tcp_sock or NULL */
316 PTR_TO_TP_BUFFER, /* reg points to a writable raw tp's buffer */
317 PTR_TO_XDP_SOCK, /* reg points to struct xdp_sock */
318 PTR_TO_BTF_ID, /* reg points to kernel struct */
321 /* The information passed from prog-specific *_is_valid_access
322 * back to the verifier.
324 struct bpf_insn_access_aux {
325 enum bpf_reg_type reg_type;
330 struct bpf_verifier_log *log; /* for verbose logs */
334 bpf_ctx_record_field_size(struct bpf_insn_access_aux *aux, u32 size)
336 aux->ctx_field_size = size;
339 struct bpf_prog_ops {
340 int (*test_run)(struct bpf_prog *prog, const union bpf_attr *kattr,
341 union bpf_attr __user *uattr);
344 struct bpf_verifier_ops {
345 /* return eBPF function prototype for verification */
346 const struct bpf_func_proto *
347 (*get_func_proto)(enum bpf_func_id func_id,
348 const struct bpf_prog *prog);
350 /* return true if 'size' wide access at offset 'off' within bpf_context
351 * with 'type' (read or write) is allowed
353 bool (*is_valid_access)(int off, int size, enum bpf_access_type type,
354 const struct bpf_prog *prog,
355 struct bpf_insn_access_aux *info);
356 int (*gen_prologue)(struct bpf_insn *insn, bool direct_write,
357 const struct bpf_prog *prog);
358 int (*gen_ld_abs)(const struct bpf_insn *orig,
359 struct bpf_insn *insn_buf);
360 u32 (*convert_ctx_access)(enum bpf_access_type type,
361 const struct bpf_insn *src,
362 struct bpf_insn *dst,
363 struct bpf_prog *prog, u32 *target_size);
364 int (*btf_struct_access)(struct bpf_verifier_log *log,
365 const struct btf_type *t, int off, int size,
366 enum bpf_access_type atype,
370 struct bpf_prog_offload_ops {
371 /* verifier basic callbacks */
372 int (*insn_hook)(struct bpf_verifier_env *env,
373 int insn_idx, int prev_insn_idx);
374 int (*finalize)(struct bpf_verifier_env *env);
375 /* verifier optimization callbacks (called after .finalize) */
376 int (*replace_insn)(struct bpf_verifier_env *env, u32 off,
377 struct bpf_insn *insn);
378 int (*remove_insns)(struct bpf_verifier_env *env, u32 off, u32 cnt);
379 /* program management callbacks */
380 int (*prepare)(struct bpf_prog *prog);
381 int (*translate)(struct bpf_prog *prog);
382 void (*destroy)(struct bpf_prog *prog);
385 struct bpf_prog_offload {
386 struct bpf_prog *prog;
387 struct net_device *netdev;
388 struct bpf_offload_dev *offdev;
390 struct list_head offloads;
397 enum bpf_cgroup_storage_type {
398 BPF_CGROUP_STORAGE_SHARED,
399 BPF_CGROUP_STORAGE_PERCPU,
400 __BPF_CGROUP_STORAGE_MAX
403 #define MAX_BPF_CGROUP_STORAGE_TYPE __BPF_CGROUP_STORAGE_MAX
405 /* The longest tracepoint has 12 args.
406 * See include/trace/bpf_probe.h
408 #define MAX_BPF_FUNC_ARGS 12
410 struct bpf_prog_stats {
413 struct u64_stats_sync syncp;
414 } __aligned(2 * sizeof(u64));
416 struct btf_func_model {
419 u8 arg_size[MAX_BPF_FUNC_ARGS];
422 /* Restore arguments before returning from trampoline to let original function
423 * continue executing. This flag is used for fentry progs when there are no
426 #define BPF_TRAMP_F_RESTORE_REGS BIT(0)
427 /* Call original function after fentry progs, but before fexit progs.
428 * Makes sense for fentry/fexit, normal calls and indirect calls.
430 #define BPF_TRAMP_F_CALL_ORIG BIT(1)
431 /* Skip current frame and return to parent. Makes sense for fentry/fexit
432 * programs only. Should not be used with normal calls and indirect calls.
434 #define BPF_TRAMP_F_SKIP_FRAME BIT(2)
436 /* Different use cases for BPF trampoline:
437 * 1. replace nop at the function entry (kprobe equivalent)
438 * flags = BPF_TRAMP_F_RESTORE_REGS
439 * fentry = a set of programs to run before returning from trampoline
441 * 2. replace nop at the function entry (kprobe + kretprobe equivalent)
442 * flags = BPF_TRAMP_F_CALL_ORIG | BPF_TRAMP_F_SKIP_FRAME
443 * orig_call = fentry_ip + MCOUNT_INSN_SIZE
444 * fentry = a set of program to run before calling original function
445 * fexit = a set of program to run after original function
447 * 3. replace direct call instruction anywhere in the function body
448 * or assign a function pointer for indirect call (like tcp_congestion_ops->cong_avoid)
450 * fentry = a set of programs to run before returning from trampoline
451 * With flags = BPF_TRAMP_F_CALL_ORIG
452 * orig_call = original callback addr or direct function addr
453 * fentry = a set of program to run before calling original function
454 * fexit = a set of program to run after original function
456 int arch_prepare_bpf_trampoline(void *image, void *image_end,
457 const struct btf_func_model *m, u32 flags,
458 struct bpf_prog **fentry_progs, int fentry_cnt,
459 struct bpf_prog **fexit_progs, int fexit_cnt,
461 /* these two functions are called from generated trampoline */
462 u64 notrace __bpf_prog_enter(void);
463 void notrace __bpf_prog_exit(struct bpf_prog *prog, u64 start);
465 enum bpf_tramp_prog_type {
469 BPF_TRAMP_REPLACE, /* more than MAX */
472 struct bpf_trampoline {
473 /* hlist for trampoline_table */
474 struct hlist_node hlist;
475 /* serializes access to fields of this trampoline */
480 struct btf_func_model model;
484 /* if !NULL this is BPF_PROG_TYPE_EXT program that extends another BPF
485 * program by replacing one of its functions. func.addr is the address
486 * of the function it replaced.
488 struct bpf_prog *extension_prog;
489 /* list of BPF programs using this trampoline */
490 struct hlist_head progs_hlist[BPF_TRAMP_MAX];
491 /* Number of attached programs. A counter per kind. */
492 int progs_cnt[BPF_TRAMP_MAX];
493 /* Executable image of trampoline */
498 #define BPF_DISPATCHER_MAX 48 /* Fits in 2048B */
500 struct bpf_dispatcher_prog {
501 struct bpf_prog *prog;
505 struct bpf_dispatcher {
506 /* dispatcher mutex */
509 struct bpf_dispatcher_prog progs[BPF_DISPATCHER_MAX];
515 static __always_inline unsigned int bpf_dispatcher_nopfunc(
517 const struct bpf_insn *insnsi,
518 unsigned int (*bpf_func)(const void *,
519 const struct bpf_insn *))
521 return bpf_func(ctx, insnsi);
523 #ifdef CONFIG_BPF_JIT
524 struct bpf_trampoline *bpf_trampoline_lookup(u64 key);
525 int bpf_trampoline_link_prog(struct bpf_prog *prog);
526 int bpf_trampoline_unlink_prog(struct bpf_prog *prog);
527 void bpf_trampoline_put(struct bpf_trampoline *tr);
528 #define BPF_DISPATCHER_INIT(name) { \
529 .mutex = __MUTEX_INITIALIZER(name.mutex), \
530 .func = &name##func, \
537 #define DEFINE_BPF_DISPATCHER(name) \
538 noinline unsigned int name##func( \
540 const struct bpf_insn *insnsi, \
541 unsigned int (*bpf_func)(const void *, \
542 const struct bpf_insn *)) \
544 return bpf_func(ctx, insnsi); \
546 EXPORT_SYMBOL(name##func); \
547 struct bpf_dispatcher name = BPF_DISPATCHER_INIT(name);
548 #define DECLARE_BPF_DISPATCHER(name) \
549 unsigned int name##func( \
551 const struct bpf_insn *insnsi, \
552 unsigned int (*bpf_func)(const void *, \
553 const struct bpf_insn *)); \
554 extern struct bpf_dispatcher name;
555 #define BPF_DISPATCHER_FUNC(name) name##func
556 #define BPF_DISPATCHER_PTR(name) (&name)
557 void bpf_dispatcher_change_prog(struct bpf_dispatcher *d, struct bpf_prog *from,
558 struct bpf_prog *to);
560 struct latch_tree_node tnode;
561 unsigned char data[];
563 #define BPF_IMAGE_SIZE (PAGE_SIZE - sizeof(struct bpf_image))
564 bool is_bpf_image_address(unsigned long address);
565 void *bpf_image_alloc(void);
567 static inline struct bpf_trampoline *bpf_trampoline_lookup(u64 key)
571 static inline int bpf_trampoline_link_prog(struct bpf_prog *prog)
575 static inline int bpf_trampoline_unlink_prog(struct bpf_prog *prog)
579 static inline void bpf_trampoline_put(struct bpf_trampoline *tr) {}
580 #define DEFINE_BPF_DISPATCHER(name)
581 #define DECLARE_BPF_DISPATCHER(name)
582 #define BPF_DISPATCHER_FUNC(name) bpf_dispatcher_nopfunc
583 #define BPF_DISPATCHER_PTR(name) NULL
584 static inline void bpf_dispatcher_change_prog(struct bpf_dispatcher *d,
585 struct bpf_prog *from,
586 struct bpf_prog *to) {}
587 static inline bool is_bpf_image_address(unsigned long address)
593 struct bpf_func_info_aux {
598 enum bpf_jit_poke_reason {
599 BPF_POKE_REASON_TAIL_CALL,
602 /* Descriptor of pokes pointing /into/ the JITed image. */
603 struct bpf_jit_poke_descriptor {
616 struct bpf_prog_aux {
624 u32 func_cnt; /* used by non-func prog as the number of func progs */
625 u32 func_idx; /* 0 for non-func prog, the index in func array for func prog */
626 u32 attach_btf_id; /* in-kernel BTF type id to attach to */
627 struct bpf_prog *linked_prog;
628 bool verifier_zext; /* Zero extensions has been inserted by verifier. */
629 bool offload_requested;
630 bool attach_btf_trace; /* true if attaching to BTF-enabled raw tp */
631 bool func_proto_unreliable;
632 enum bpf_tramp_prog_type trampoline_prog_type;
633 struct bpf_trampoline *trampoline;
634 struct hlist_node tramp_hlist;
635 /* BTF_KIND_FUNC_PROTO for valid attach_btf_id */
636 const struct btf_type *attach_func_proto;
637 /* function name for valid attach_btf_id */
638 const char *attach_func_name;
639 struct bpf_prog **func;
640 void *jit_data; /* JIT specific data. arch dependent */
641 struct bpf_jit_poke_descriptor *poke_tab;
643 struct latch_tree_node ksym_tnode;
644 struct list_head ksym_lnode;
645 const struct bpf_prog_ops *ops;
646 struct bpf_map **used_maps;
647 struct bpf_prog *prog;
648 struct user_struct *user;
649 u64 load_time; /* ns since boottime */
650 struct bpf_map *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE];
651 char name[BPF_OBJ_NAME_LEN];
652 #ifdef CONFIG_SECURITY
655 struct bpf_prog_offload *offload;
657 struct bpf_func_info *func_info;
658 struct bpf_func_info_aux *func_info_aux;
659 /* bpf_line_info loaded from userspace. linfo->insn_off
660 * has the xlated insn offset.
661 * Both the main and sub prog share the same linfo.
662 * The subprog can access its first linfo by
663 * using the linfo_idx.
665 struct bpf_line_info *linfo;
666 /* jited_linfo is the jited addr of the linfo. It has a
667 * one to one mapping to linfo:
668 * jited_linfo[i] is the jited addr for the linfo[i]->insn_off.
669 * Both the main and sub prog share the same jited_linfo.
670 * The subprog can access its first jited_linfo by
671 * using the linfo_idx.
676 /* subprog can use linfo_idx to access its first linfo and
678 * main prog always has linfo_idx == 0
682 struct exception_table_entry *extable;
683 struct bpf_prog_stats __percpu *stats;
685 struct work_struct work;
690 struct bpf_array_aux {
691 /* 'Ownership' of prog array is claimed by the first program that
692 * is going to use this map or by the first program which FD is
693 * stored in the map to make sure that all callers and callees have
694 * the same prog type and JITed flag.
696 enum bpf_prog_type type;
698 /* Programs with direct jumps into programs part of this array. */
699 struct list_head poke_progs;
701 struct mutex poke_mutex;
702 struct work_struct work;
705 struct bpf_struct_ops_value;
709 #define BPF_STRUCT_OPS_MAX_NR_MEMBERS 64
710 struct bpf_struct_ops {
711 const struct bpf_verifier_ops *verifier_ops;
712 int (*init)(struct btf *btf);
713 int (*check_member)(const struct btf_type *t,
714 const struct btf_member *member);
715 int (*init_member)(const struct btf_type *t,
716 const struct btf_member *member,
717 void *kdata, const void *udata);
718 int (*reg)(void *kdata);
719 void (*unreg)(void *kdata);
720 const struct btf_type *type;
721 const struct btf_type *value_type;
723 struct btf_func_model func_models[BPF_STRUCT_OPS_MAX_NR_MEMBERS];
728 #if defined(CONFIG_BPF_JIT) && defined(CONFIG_BPF_SYSCALL)
729 #define BPF_MODULE_OWNER ((void *)((0xeB9FUL << 2) + POISON_POINTER_DELTA))
730 const struct bpf_struct_ops *bpf_struct_ops_find(u32 type_id);
731 void bpf_struct_ops_init(struct btf *btf, struct bpf_verifier_log *log);
732 bool bpf_struct_ops_get(const void *kdata);
733 void bpf_struct_ops_put(const void *kdata);
734 int bpf_struct_ops_map_sys_lookup_elem(struct bpf_map *map, void *key,
736 static inline bool bpf_try_module_get(const void *data, struct module *owner)
738 if (owner == BPF_MODULE_OWNER)
739 return bpf_struct_ops_get(data);
741 return try_module_get(owner);
743 static inline void bpf_module_put(const void *data, struct module *owner)
745 if (owner == BPF_MODULE_OWNER)
746 bpf_struct_ops_put(data);
751 static inline const struct bpf_struct_ops *bpf_struct_ops_find(u32 type_id)
755 static inline void bpf_struct_ops_init(struct btf *btf,
756 struct bpf_verifier_log *log)
759 static inline bool bpf_try_module_get(const void *data, struct module *owner)
761 return try_module_get(owner);
763 static inline void bpf_module_put(const void *data, struct module *owner)
767 static inline int bpf_struct_ops_map_sys_lookup_elem(struct bpf_map *map,
779 struct bpf_array_aux *aux;
781 char value[0] __aligned(8);
782 void *ptrs[0] __aligned(8);
783 void __percpu *pptrs[0] __aligned(8);
787 #define BPF_COMPLEXITY_LIMIT_INSNS 1000000 /* yes. 1M insns */
788 #define MAX_TAIL_CALL_CNT 32
790 #define BPF_F_ACCESS_MASK (BPF_F_RDONLY | \
791 BPF_F_RDONLY_PROG | \
795 #define BPF_MAP_CAN_READ BIT(0)
796 #define BPF_MAP_CAN_WRITE BIT(1)
798 static inline u32 bpf_map_flags_to_cap(struct bpf_map *map)
800 u32 access_flags = map->map_flags & (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG);
802 /* Combination of BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG is
805 if (access_flags & BPF_F_RDONLY_PROG)
806 return BPF_MAP_CAN_READ;
807 else if (access_flags & BPF_F_WRONLY_PROG)
808 return BPF_MAP_CAN_WRITE;
810 return BPF_MAP_CAN_READ | BPF_MAP_CAN_WRITE;
813 static inline bool bpf_map_flags_access_ok(u32 access_flags)
815 return (access_flags & (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG)) !=
816 (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG);
819 struct bpf_event_entry {
820 struct perf_event *event;
821 struct file *perf_file;
822 struct file *map_file;
826 bool bpf_prog_array_compatible(struct bpf_array *array, const struct bpf_prog *fp);
827 int bpf_prog_calc_tag(struct bpf_prog *fp);
828 const char *kernel_type_name(u32 btf_type_id);
830 const struct bpf_func_proto *bpf_get_trace_printk_proto(void);
832 typedef unsigned long (*bpf_ctx_copy_t)(void *dst, const void *src,
833 unsigned long off, unsigned long len);
834 typedef u32 (*bpf_convert_ctx_access_t)(enum bpf_access_type type,
835 const struct bpf_insn *src,
836 struct bpf_insn *dst,
837 struct bpf_prog *prog,
840 u64 bpf_event_output(struct bpf_map *map, u64 flags, void *meta, u64 meta_size,
841 void *ctx, u64 ctx_size, bpf_ctx_copy_t ctx_copy);
843 /* an array of programs to be executed under rcu_lock.
846 * ret = BPF_PROG_RUN_ARRAY(&bpf_prog_array, ctx, BPF_PROG_RUN);
848 * the structure returned by bpf_prog_array_alloc() should be populated
849 * with program pointers and the last pointer must be NULL.
850 * The user has to keep refcnt on the program and make sure the program
851 * is removed from the array before bpf_prog_put().
852 * The 'struct bpf_prog_array *' should only be replaced with xchg()
853 * since other cpus are walking the array of pointers in parallel.
855 struct bpf_prog_array_item {
856 struct bpf_prog *prog;
857 struct bpf_cgroup_storage *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE];
860 struct bpf_prog_array {
862 struct bpf_prog_array_item items[0];
865 struct bpf_prog_array *bpf_prog_array_alloc(u32 prog_cnt, gfp_t flags);
866 void bpf_prog_array_free(struct bpf_prog_array *progs);
867 int bpf_prog_array_length(struct bpf_prog_array *progs);
868 bool bpf_prog_array_is_empty(struct bpf_prog_array *array);
869 int bpf_prog_array_copy_to_user(struct bpf_prog_array *progs,
870 __u32 __user *prog_ids, u32 cnt);
872 void bpf_prog_array_delete_safe(struct bpf_prog_array *progs,
873 struct bpf_prog *old_prog);
874 int bpf_prog_array_copy_info(struct bpf_prog_array *array,
875 u32 *prog_ids, u32 request_cnt,
877 int bpf_prog_array_copy(struct bpf_prog_array *old_array,
878 struct bpf_prog *exclude_prog,
879 struct bpf_prog *include_prog,
880 struct bpf_prog_array **new_array);
882 #define __BPF_PROG_RUN_ARRAY(array, ctx, func, check_non_null) \
884 struct bpf_prog_array_item *_item; \
885 struct bpf_prog *_prog; \
886 struct bpf_prog_array *_array; \
890 _array = rcu_dereference(array); \
891 if (unlikely(check_non_null && !_array))\
893 _item = &_array->items[0]; \
894 while ((_prog = READ_ONCE(_item->prog))) { \
895 bpf_cgroup_storage_set(_item->cgroup_storage); \
896 _ret &= func(_prog, ctx); \
905 /* To be used by __cgroup_bpf_run_filter_skb for EGRESS BPF progs
906 * so BPF programs can request cwr for TCP packets.
908 * Current cgroup skb programs can only return 0 or 1 (0 to drop the
909 * packet. This macro changes the behavior so the low order bit
910 * indicates whether the packet should be dropped (0) or not (1)
911 * and the next bit is a congestion notification bit. This could be
912 * used by TCP to call tcp_enter_cwr()
914 * Hence, new allowed return values of CGROUP EGRESS BPF programs are:
917 * 2: drop packet and cn
918 * 3: keep packet and cn
920 * This macro then converts it to one of the NET_XMIT or an error
921 * code that is then interpreted as drop packet (and no cn):
922 * 0: NET_XMIT_SUCCESS skb should be transmitted
923 * 1: NET_XMIT_DROP skb should be dropped and cn
924 * 2: NET_XMIT_CN skb should be transmitted and cn
925 * 3: -EPERM skb should be dropped
927 #define BPF_PROG_CGROUP_INET_EGRESS_RUN_ARRAY(array, ctx, func) \
929 struct bpf_prog_array_item *_item; \
930 struct bpf_prog *_prog; \
931 struct bpf_prog_array *_array; \
937 _array = rcu_dereference(array); \
938 _item = &_array->items[0]; \
939 while ((_prog = READ_ONCE(_item->prog))) { \
940 bpf_cgroup_storage_set(_item->cgroup_storage); \
941 ret = func(_prog, ctx); \
949 _ret = (_cn ? NET_XMIT_CN : NET_XMIT_SUCCESS); \
951 _ret = (_cn ? NET_XMIT_DROP : -EPERM); \
955 #define BPF_PROG_RUN_ARRAY(array, ctx, func) \
956 __BPF_PROG_RUN_ARRAY(array, ctx, func, false)
958 #define BPF_PROG_RUN_ARRAY_CHECK(array, ctx, func) \
959 __BPF_PROG_RUN_ARRAY(array, ctx, func, true)
961 #ifdef CONFIG_BPF_SYSCALL
962 DECLARE_PER_CPU(int, bpf_prog_active);
964 extern const struct file_operations bpf_map_fops;
965 extern const struct file_operations bpf_prog_fops;
967 #define BPF_PROG_TYPE(_id, _name, prog_ctx_type, kern_ctx_type) \
968 extern const struct bpf_prog_ops _name ## _prog_ops; \
969 extern const struct bpf_verifier_ops _name ## _verifier_ops;
970 #define BPF_MAP_TYPE(_id, _ops) \
971 extern const struct bpf_map_ops _ops;
972 #include <linux/bpf_types.h>
976 extern const struct bpf_prog_ops bpf_offload_prog_ops;
977 extern const struct bpf_verifier_ops tc_cls_act_analyzer_ops;
978 extern const struct bpf_verifier_ops xdp_analyzer_ops;
980 struct bpf_prog *bpf_prog_get(u32 ufd);
981 struct bpf_prog *bpf_prog_get_type_dev(u32 ufd, enum bpf_prog_type type,
983 void bpf_prog_add(struct bpf_prog *prog, int i);
984 void bpf_prog_sub(struct bpf_prog *prog, int i);
985 void bpf_prog_inc(struct bpf_prog *prog);
986 struct bpf_prog * __must_check bpf_prog_inc_not_zero(struct bpf_prog *prog);
987 void bpf_prog_put(struct bpf_prog *prog);
988 int __bpf_prog_charge(struct user_struct *user, u32 pages);
989 void __bpf_prog_uncharge(struct user_struct *user, u32 pages);
990 void __bpf_free_used_maps(struct bpf_prog_aux *aux,
991 struct bpf_map **used_maps, u32 len);
993 void bpf_prog_free_id(struct bpf_prog *prog, bool do_idr_lock);
994 void bpf_map_free_id(struct bpf_map *map, bool do_idr_lock);
996 struct bpf_map *bpf_map_get_with_uref(u32 ufd);
997 struct bpf_map *__bpf_map_get(struct fd f);
998 void bpf_map_inc(struct bpf_map *map);
999 void bpf_map_inc_with_uref(struct bpf_map *map);
1000 struct bpf_map * __must_check bpf_map_inc_not_zero(struct bpf_map *map);
1001 void bpf_map_put_with_uref(struct bpf_map *map);
1002 void bpf_map_put(struct bpf_map *map);
1003 int bpf_map_charge_memlock(struct bpf_map *map, u32 pages);
1004 void bpf_map_uncharge_memlock(struct bpf_map *map, u32 pages);
1005 int bpf_map_charge_init(struct bpf_map_memory *mem, u64 size);
1006 void bpf_map_charge_finish(struct bpf_map_memory *mem);
1007 void bpf_map_charge_move(struct bpf_map_memory *dst,
1008 struct bpf_map_memory *src);
1009 void *bpf_map_area_alloc(u64 size, int numa_node);
1010 void *bpf_map_area_mmapable_alloc(u64 size, int numa_node);
1011 void bpf_map_area_free(void *base);
1012 void bpf_map_init_from_attr(struct bpf_map *map, union bpf_attr *attr);
1013 int generic_map_lookup_batch(struct bpf_map *map,
1014 const union bpf_attr *attr,
1015 union bpf_attr __user *uattr);
1016 int generic_map_update_batch(struct bpf_map *map,
1017 const union bpf_attr *attr,
1018 union bpf_attr __user *uattr);
1019 int generic_map_delete_batch(struct bpf_map *map,
1020 const union bpf_attr *attr,
1021 union bpf_attr __user *uattr);
1023 extern int sysctl_unprivileged_bpf_disabled;
1025 int bpf_map_new_fd(struct bpf_map *map, int flags);
1026 int bpf_prog_new_fd(struct bpf_prog *prog);
1028 int bpf_obj_pin_user(u32 ufd, const char __user *pathname);
1029 int bpf_obj_get_user(const char __user *pathname, int flags);
1031 int bpf_percpu_hash_copy(struct bpf_map *map, void *key, void *value);
1032 int bpf_percpu_array_copy(struct bpf_map *map, void *key, void *value);
1033 int bpf_percpu_hash_update(struct bpf_map *map, void *key, void *value,
1035 int bpf_percpu_array_update(struct bpf_map *map, void *key, void *value,
1038 int bpf_stackmap_copy(struct bpf_map *map, void *key, void *value);
1040 int bpf_fd_array_map_update_elem(struct bpf_map *map, struct file *map_file,
1041 void *key, void *value, u64 map_flags);
1042 int bpf_fd_array_map_lookup_elem(struct bpf_map *map, void *key, u32 *value);
1043 int bpf_fd_htab_map_update_elem(struct bpf_map *map, struct file *map_file,
1044 void *key, void *value, u64 map_flags);
1045 int bpf_fd_htab_map_lookup_elem(struct bpf_map *map, void *key, u32 *value);
1047 int bpf_get_file_flag(int flags);
1048 int bpf_check_uarg_tail_zero(void __user *uaddr, size_t expected_size,
1049 size_t actual_size);
1051 /* memcpy that is used with 8-byte aligned pointers, power-of-8 size and
1052 * forced to use 'long' read/writes to try to atomically copy long counters.
1053 * Best-effort only. No barriers here, since it _will_ race with concurrent
1054 * updates from BPF programs. Called from bpf syscall and mostly used with
1055 * size 8 or 16 bytes, so ask compiler to inline it.
1057 static inline void bpf_long_memcpy(void *dst, const void *src, u32 size)
1059 const long *lsrc = src;
1062 size /= sizeof(long);
1067 /* verify correctness of eBPF program */
1068 int bpf_check(struct bpf_prog **fp, union bpf_attr *attr,
1069 union bpf_attr __user *uattr);
1070 void bpf_patch_call_args(struct bpf_insn *insn, u32 stack_depth);
1076 struct bpf_dtab_netdev *__dev_map_lookup_elem(struct bpf_map *map, u32 key);
1077 struct bpf_dtab_netdev *__dev_map_hash_lookup_elem(struct bpf_map *map, u32 key);
1078 void __dev_flush(void);
1079 int dev_xdp_enqueue(struct net_device *dev, struct xdp_buff *xdp,
1080 struct net_device *dev_rx);
1081 int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp,
1082 struct net_device *dev_rx);
1083 int dev_map_generic_redirect(struct bpf_dtab_netdev *dst, struct sk_buff *skb,
1084 struct bpf_prog *xdp_prog);
1086 struct bpf_cpu_map_entry *__cpu_map_lookup_elem(struct bpf_map *map, u32 key);
1087 void __cpu_map_flush(void);
1088 int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu, struct xdp_buff *xdp,
1089 struct net_device *dev_rx);
1091 /* Return map's numa specified by userspace */
1092 static inline int bpf_map_attr_numa_node(const union bpf_attr *attr)
1094 return (attr->map_flags & BPF_F_NUMA_NODE) ?
1095 attr->numa_node : NUMA_NO_NODE;
1098 struct bpf_prog *bpf_prog_get_type_path(const char *name, enum bpf_prog_type type);
1099 int array_map_alloc_check(union bpf_attr *attr);
1101 int bpf_prog_test_run_xdp(struct bpf_prog *prog, const union bpf_attr *kattr,
1102 union bpf_attr __user *uattr);
1103 int bpf_prog_test_run_skb(struct bpf_prog *prog, const union bpf_attr *kattr,
1104 union bpf_attr __user *uattr);
1105 int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog,
1106 const union bpf_attr *kattr,
1107 union bpf_attr __user *uattr);
1108 bool btf_ctx_access(int off, int size, enum bpf_access_type type,
1109 const struct bpf_prog *prog,
1110 struct bpf_insn_access_aux *info);
1111 int btf_struct_access(struct bpf_verifier_log *log,
1112 const struct btf_type *t, int off, int size,
1113 enum bpf_access_type atype,
1115 int btf_resolve_helper_id(struct bpf_verifier_log *log,
1116 const struct bpf_func_proto *fn, int);
1118 int btf_distill_func_proto(struct bpf_verifier_log *log,
1120 const struct btf_type *func_proto,
1121 const char *func_name,
1122 struct btf_func_model *m);
1124 struct bpf_reg_state;
1125 int btf_check_func_arg_match(struct bpf_verifier_env *env, int subprog,
1126 struct bpf_reg_state *regs);
1127 int btf_prepare_func_args(struct bpf_verifier_env *env, int subprog,
1128 struct bpf_reg_state *reg);
1129 int btf_check_type_match(struct bpf_verifier_env *env, struct bpf_prog *prog,
1130 struct btf *btf, const struct btf_type *t);
1132 struct bpf_prog *bpf_prog_by_id(u32 id);
1134 #else /* !CONFIG_BPF_SYSCALL */
1135 static inline struct bpf_prog *bpf_prog_get(u32 ufd)
1137 return ERR_PTR(-EOPNOTSUPP);
1140 static inline struct bpf_prog *bpf_prog_get_type_dev(u32 ufd,
1141 enum bpf_prog_type type,
1144 return ERR_PTR(-EOPNOTSUPP);
1147 static inline void bpf_prog_add(struct bpf_prog *prog, int i)
1151 static inline void bpf_prog_sub(struct bpf_prog *prog, int i)
1155 static inline void bpf_prog_put(struct bpf_prog *prog)
1159 static inline void bpf_prog_inc(struct bpf_prog *prog)
1163 static inline struct bpf_prog *__must_check
1164 bpf_prog_inc_not_zero(struct bpf_prog *prog)
1166 return ERR_PTR(-EOPNOTSUPP);
1169 static inline int __bpf_prog_charge(struct user_struct *user, u32 pages)
1174 static inline void __bpf_prog_uncharge(struct user_struct *user, u32 pages)
1178 static inline int bpf_obj_get_user(const char __user *pathname, int flags)
1183 static inline struct net_device *__dev_map_lookup_elem(struct bpf_map *map,
1189 static inline struct net_device *__dev_map_hash_lookup_elem(struct bpf_map *map,
1195 static inline void __dev_flush(void)
1200 struct bpf_dtab_netdev;
1203 int dev_xdp_enqueue(struct net_device *dev, struct xdp_buff *xdp,
1204 struct net_device *dev_rx)
1210 int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp,
1211 struct net_device *dev_rx)
1218 static inline int dev_map_generic_redirect(struct bpf_dtab_netdev *dst,
1219 struct sk_buff *skb,
1220 struct bpf_prog *xdp_prog)
1226 struct bpf_cpu_map_entry *__cpu_map_lookup_elem(struct bpf_map *map, u32 key)
1231 static inline void __cpu_map_flush(void)
1235 static inline int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu,
1236 struct xdp_buff *xdp,
1237 struct net_device *dev_rx)
1242 static inline struct bpf_prog *bpf_prog_get_type_path(const char *name,
1243 enum bpf_prog_type type)
1245 return ERR_PTR(-EOPNOTSUPP);
1248 static inline int bpf_prog_test_run_xdp(struct bpf_prog *prog,
1249 const union bpf_attr *kattr,
1250 union bpf_attr __user *uattr)
1255 static inline int bpf_prog_test_run_skb(struct bpf_prog *prog,
1256 const union bpf_attr *kattr,
1257 union bpf_attr __user *uattr)
1262 static inline int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog,
1263 const union bpf_attr *kattr,
1264 union bpf_attr __user *uattr)
1269 static inline void bpf_map_put(struct bpf_map *map)
1273 static inline struct bpf_prog *bpf_prog_by_id(u32 id)
1275 return ERR_PTR(-ENOTSUPP);
1277 #endif /* CONFIG_BPF_SYSCALL */
1279 static inline struct bpf_prog *bpf_prog_get_type(u32 ufd,
1280 enum bpf_prog_type type)
1282 return bpf_prog_get_type_dev(ufd, type, false);
1285 bool bpf_prog_get_ok(struct bpf_prog *, enum bpf_prog_type *, bool);
1287 int bpf_prog_offload_compile(struct bpf_prog *prog);
1288 void bpf_prog_offload_destroy(struct bpf_prog *prog);
1289 int bpf_prog_offload_info_fill(struct bpf_prog_info *info,
1290 struct bpf_prog *prog);
1292 int bpf_map_offload_info_fill(struct bpf_map_info *info, struct bpf_map *map);
1294 int bpf_map_offload_lookup_elem(struct bpf_map *map, void *key, void *value);
1295 int bpf_map_offload_update_elem(struct bpf_map *map,
1296 void *key, void *value, u64 flags);
1297 int bpf_map_offload_delete_elem(struct bpf_map *map, void *key);
1298 int bpf_map_offload_get_next_key(struct bpf_map *map,
1299 void *key, void *next_key);
1301 bool bpf_offload_prog_map_match(struct bpf_prog *prog, struct bpf_map *map);
1303 struct bpf_offload_dev *
1304 bpf_offload_dev_create(const struct bpf_prog_offload_ops *ops, void *priv);
1305 void bpf_offload_dev_destroy(struct bpf_offload_dev *offdev);
1306 void *bpf_offload_dev_priv(struct bpf_offload_dev *offdev);
1307 int bpf_offload_dev_netdev_register(struct bpf_offload_dev *offdev,
1308 struct net_device *netdev);
1309 void bpf_offload_dev_netdev_unregister(struct bpf_offload_dev *offdev,
1310 struct net_device *netdev);
1311 bool bpf_offload_dev_match(struct bpf_prog *prog, struct net_device *netdev);
1313 #if defined(CONFIG_NET) && defined(CONFIG_BPF_SYSCALL)
1314 int bpf_prog_offload_init(struct bpf_prog *prog, union bpf_attr *attr);
1316 static inline bool bpf_prog_is_dev_bound(const struct bpf_prog_aux *aux)
1318 return aux->offload_requested;
1321 static inline bool bpf_map_is_dev_bound(struct bpf_map *map)
1323 return unlikely(map->ops == &bpf_map_offload_ops);
1326 struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr);
1327 void bpf_map_offload_map_free(struct bpf_map *map);
1329 static inline int bpf_prog_offload_init(struct bpf_prog *prog,
1330 union bpf_attr *attr)
1335 static inline bool bpf_prog_is_dev_bound(struct bpf_prog_aux *aux)
1340 static inline bool bpf_map_is_dev_bound(struct bpf_map *map)
1345 static inline struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr)
1347 return ERR_PTR(-EOPNOTSUPP);
1350 static inline void bpf_map_offload_map_free(struct bpf_map *map)
1353 #endif /* CONFIG_NET && CONFIG_BPF_SYSCALL */
1355 #if defined(CONFIG_BPF_STREAM_PARSER)
1356 int sock_map_prog_update(struct bpf_map *map, struct bpf_prog *prog, u32 which);
1357 int sock_map_get_from_fd(const union bpf_attr *attr, struct bpf_prog *prog);
1359 static inline int sock_map_prog_update(struct bpf_map *map,
1360 struct bpf_prog *prog, u32 which)
1365 static inline int sock_map_get_from_fd(const union bpf_attr *attr,
1366 struct bpf_prog *prog)
1372 #if defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL)
1373 void bpf_sk_reuseport_detach(struct sock *sk);
1374 int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map, void *key,
1376 int bpf_fd_reuseport_array_update_elem(struct bpf_map *map, void *key,
1377 void *value, u64 map_flags);
1379 static inline void bpf_sk_reuseport_detach(struct sock *sk)
1383 #ifdef CONFIG_BPF_SYSCALL
1384 static inline int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map,
1385 void *key, void *value)
1390 static inline int bpf_fd_reuseport_array_update_elem(struct bpf_map *map,
1391 void *key, void *value,
1396 #endif /* CONFIG_BPF_SYSCALL */
1397 #endif /* defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL) */
1399 /* verifier prototypes for helper functions called from eBPF programs */
1400 extern const struct bpf_func_proto bpf_map_lookup_elem_proto;
1401 extern const struct bpf_func_proto bpf_map_update_elem_proto;
1402 extern const struct bpf_func_proto bpf_map_delete_elem_proto;
1403 extern const struct bpf_func_proto bpf_map_push_elem_proto;
1404 extern const struct bpf_func_proto bpf_map_pop_elem_proto;
1405 extern const struct bpf_func_proto bpf_map_peek_elem_proto;
1407 extern const struct bpf_func_proto bpf_get_prandom_u32_proto;
1408 extern const struct bpf_func_proto bpf_get_smp_processor_id_proto;
1409 extern const struct bpf_func_proto bpf_get_numa_node_id_proto;
1410 extern const struct bpf_func_proto bpf_tail_call_proto;
1411 extern const struct bpf_func_proto bpf_ktime_get_ns_proto;
1412 extern const struct bpf_func_proto bpf_get_current_pid_tgid_proto;
1413 extern const struct bpf_func_proto bpf_get_current_uid_gid_proto;
1414 extern const struct bpf_func_proto bpf_get_current_comm_proto;
1415 extern const struct bpf_func_proto bpf_get_stackid_proto;
1416 extern const struct bpf_func_proto bpf_get_stack_proto;
1417 extern const struct bpf_func_proto bpf_sock_map_update_proto;
1418 extern const struct bpf_func_proto bpf_sock_hash_update_proto;
1419 extern const struct bpf_func_proto bpf_get_current_cgroup_id_proto;
1420 extern const struct bpf_func_proto bpf_msg_redirect_hash_proto;
1421 extern const struct bpf_func_proto bpf_msg_redirect_map_proto;
1422 extern const struct bpf_func_proto bpf_sk_redirect_hash_proto;
1423 extern const struct bpf_func_proto bpf_sk_redirect_map_proto;
1424 extern const struct bpf_func_proto bpf_spin_lock_proto;
1425 extern const struct bpf_func_proto bpf_spin_unlock_proto;
1426 extern const struct bpf_func_proto bpf_get_local_storage_proto;
1427 extern const struct bpf_func_proto bpf_strtol_proto;
1428 extern const struct bpf_func_proto bpf_strtoul_proto;
1429 extern const struct bpf_func_proto bpf_tcp_sock_proto;
1430 extern const struct bpf_func_proto bpf_jiffies64_proto;
1432 /* Shared helpers among cBPF and eBPF. */
1433 void bpf_user_rnd_init_once(void);
1434 u64 bpf_user_rnd_u32(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
1436 #if defined(CONFIG_NET)
1437 bool bpf_sock_common_is_valid_access(int off, int size,
1438 enum bpf_access_type type,
1439 struct bpf_insn_access_aux *info);
1440 bool bpf_sock_is_valid_access(int off, int size, enum bpf_access_type type,
1441 struct bpf_insn_access_aux *info);
1442 u32 bpf_sock_convert_ctx_access(enum bpf_access_type type,
1443 const struct bpf_insn *si,
1444 struct bpf_insn *insn_buf,
1445 struct bpf_prog *prog,
1448 static inline bool bpf_sock_common_is_valid_access(int off, int size,
1449 enum bpf_access_type type,
1450 struct bpf_insn_access_aux *info)
1454 static inline bool bpf_sock_is_valid_access(int off, int size,
1455 enum bpf_access_type type,
1456 struct bpf_insn_access_aux *info)
1460 static inline u32 bpf_sock_convert_ctx_access(enum bpf_access_type type,
1461 const struct bpf_insn *si,
1462 struct bpf_insn *insn_buf,
1463 struct bpf_prog *prog,
1471 struct sk_reuseport_kern {
1472 struct sk_buff *skb;
1474 struct sock *selected_sk;
1480 bool bpf_tcp_sock_is_valid_access(int off, int size, enum bpf_access_type type,
1481 struct bpf_insn_access_aux *info);
1483 u32 bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type,
1484 const struct bpf_insn *si,
1485 struct bpf_insn *insn_buf,
1486 struct bpf_prog *prog,
1489 bool bpf_xdp_sock_is_valid_access(int off, int size, enum bpf_access_type type,
1490 struct bpf_insn_access_aux *info);
1492 u32 bpf_xdp_sock_convert_ctx_access(enum bpf_access_type type,
1493 const struct bpf_insn *si,
1494 struct bpf_insn *insn_buf,
1495 struct bpf_prog *prog,
1498 static inline bool bpf_tcp_sock_is_valid_access(int off, int size,
1499 enum bpf_access_type type,
1500 struct bpf_insn_access_aux *info)
1505 static inline u32 bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type,
1506 const struct bpf_insn *si,
1507 struct bpf_insn *insn_buf,
1508 struct bpf_prog *prog,
1513 static inline bool bpf_xdp_sock_is_valid_access(int off, int size,
1514 enum bpf_access_type type,
1515 struct bpf_insn_access_aux *info)
1520 static inline u32 bpf_xdp_sock_convert_ctx_access(enum bpf_access_type type,
1521 const struct bpf_insn *si,
1522 struct bpf_insn *insn_buf,
1523 struct bpf_prog *prog,
1528 #endif /* CONFIG_INET */
1530 enum bpf_text_poke_type {
1535 int bpf_arch_text_poke(void *ip, enum bpf_text_poke_type t,
1536 void *addr1, void *addr2);
1538 #endif /* _LINUX_BPF_H */