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,
163 int bpf_obj_name_cpy(char *dst, const char *src, unsigned int size);
165 struct bpf_offload_dev;
166 struct bpf_offloaded_map;
168 struct bpf_map_dev_ops {
169 int (*map_get_next_key)(struct bpf_offloaded_map *map,
170 void *key, void *next_key);
171 int (*map_lookup_elem)(struct bpf_offloaded_map *map,
172 void *key, void *value);
173 int (*map_update_elem)(struct bpf_offloaded_map *map,
174 void *key, void *value, u64 flags);
175 int (*map_delete_elem)(struct bpf_offloaded_map *map, void *key);
178 struct bpf_offloaded_map {
180 struct net_device *netdev;
181 const struct bpf_map_dev_ops *dev_ops;
183 struct list_head offloads;
186 static inline struct bpf_offloaded_map *map_to_offmap(struct bpf_map *map)
188 return container_of(map, struct bpf_offloaded_map, map);
191 static inline bool bpf_map_offload_neutral(const struct bpf_map *map)
193 return map->map_type == BPF_MAP_TYPE_PERF_EVENT_ARRAY;
196 static inline bool bpf_map_support_seq_show(const struct bpf_map *map)
198 return (map->btf_value_type_id || map->btf_vmlinux_value_type_id) &&
199 map->ops->map_seq_show_elem;
202 int map_check_no_btf(const struct bpf_map *map,
203 const struct btf *btf,
204 const struct btf_type *key_type,
205 const struct btf_type *value_type);
207 extern const struct bpf_map_ops bpf_map_offload_ops;
209 /* function argument constraints */
211 ARG_DONTCARE = 0, /* unused argument in helper function */
213 /* the following constraints used to prototype
214 * bpf_map_lookup/update/delete_elem() functions
216 ARG_CONST_MAP_PTR, /* const argument used as pointer to bpf_map */
217 ARG_PTR_TO_MAP_KEY, /* pointer to stack used as map key */
218 ARG_PTR_TO_MAP_VALUE, /* pointer to stack used as map value */
219 ARG_PTR_TO_UNINIT_MAP_VALUE, /* pointer to valid memory used to store a map value */
220 ARG_PTR_TO_MAP_VALUE_OR_NULL, /* pointer to stack used as map value or NULL */
222 /* the following constraints used to prototype bpf_memcmp() and other
223 * functions that access data on eBPF program stack
225 ARG_PTR_TO_MEM, /* pointer to valid memory (stack, packet, map value) */
226 ARG_PTR_TO_MEM_OR_NULL, /* pointer to valid memory or NULL */
227 ARG_PTR_TO_UNINIT_MEM, /* pointer to memory does not need to be initialized,
228 * helper function must fill all bytes or clear
229 * them in error case.
232 ARG_CONST_SIZE, /* number of bytes accessed from memory */
233 ARG_CONST_SIZE_OR_ZERO, /* number of bytes accessed from memory or 0 */
235 ARG_PTR_TO_CTX, /* pointer to context */
236 ARG_ANYTHING, /* any (initialized) argument is ok */
237 ARG_PTR_TO_SPIN_LOCK, /* pointer to bpf_spin_lock */
238 ARG_PTR_TO_SOCK_COMMON, /* pointer to sock_common */
239 ARG_PTR_TO_INT, /* pointer to int */
240 ARG_PTR_TO_LONG, /* pointer to long */
241 ARG_PTR_TO_SOCKET, /* pointer to bpf_sock (fullsock) */
242 ARG_PTR_TO_BTF_ID, /* pointer to in-kernel struct */
245 /* type of values returned from helper functions */
246 enum bpf_return_type {
247 RET_INTEGER, /* function returns integer */
248 RET_VOID, /* function doesn't return anything */
249 RET_PTR_TO_MAP_VALUE, /* returns a pointer to map elem value */
250 RET_PTR_TO_MAP_VALUE_OR_NULL, /* returns a pointer to map elem value or NULL */
251 RET_PTR_TO_SOCKET_OR_NULL, /* returns a pointer to a socket or NULL */
252 RET_PTR_TO_TCP_SOCK_OR_NULL, /* returns a pointer to a tcp_sock or NULL */
253 RET_PTR_TO_SOCK_COMMON_OR_NULL, /* returns a pointer to a sock_common or NULL */
256 /* eBPF function prototype used by verifier to allow BPF_CALLs from eBPF programs
257 * to in-kernel helper functions and for adjusting imm32 field in BPF_CALL
258 * instructions after verifying
260 struct bpf_func_proto {
261 u64 (*func)(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
264 enum bpf_return_type ret_type;
267 enum bpf_arg_type arg1_type;
268 enum bpf_arg_type arg2_type;
269 enum bpf_arg_type arg3_type;
270 enum bpf_arg_type arg4_type;
271 enum bpf_arg_type arg5_type;
273 enum bpf_arg_type arg_type[5];
275 int *btf_id; /* BTF ids of arguments */
278 /* bpf_context is intentionally undefined structure. Pointer to bpf_context is
279 * the first argument to eBPF programs.
280 * For socket filters: 'struct bpf_context *' == 'struct sk_buff *'
284 enum bpf_access_type {
289 /* types of values stored in eBPF registers */
290 /* Pointer types represent:
293 * pointer + (u16) var
294 * pointer + (u16) var + imm
295 * if (range > 0) then [ptr, ptr + range - off) is safe to access
296 * if (id > 0) means that some 'var' was added
297 * if (off > 0) means that 'imm' was added
300 NOT_INIT = 0, /* nothing was written into register */
301 SCALAR_VALUE, /* reg doesn't contain a valid pointer */
302 PTR_TO_CTX, /* reg points to bpf_context */
303 CONST_PTR_TO_MAP, /* reg points to struct bpf_map */
304 PTR_TO_MAP_VALUE, /* reg points to map element value */
305 PTR_TO_MAP_VALUE_OR_NULL,/* points to map elem value or NULL */
306 PTR_TO_STACK, /* reg == frame_pointer + offset */
307 PTR_TO_PACKET_META, /* skb->data - meta_len */
308 PTR_TO_PACKET, /* reg points to skb->data */
309 PTR_TO_PACKET_END, /* skb->data + headlen */
310 PTR_TO_FLOW_KEYS, /* reg points to bpf_flow_keys */
311 PTR_TO_SOCKET, /* reg points to struct bpf_sock */
312 PTR_TO_SOCKET_OR_NULL, /* reg points to struct bpf_sock or NULL */
313 PTR_TO_SOCK_COMMON, /* reg points to sock_common */
314 PTR_TO_SOCK_COMMON_OR_NULL, /* reg points to sock_common or NULL */
315 PTR_TO_TCP_SOCK, /* reg points to struct tcp_sock */
316 PTR_TO_TCP_SOCK_OR_NULL, /* reg points to struct tcp_sock or NULL */
317 PTR_TO_TP_BUFFER, /* reg points to a writable raw tp's buffer */
318 PTR_TO_XDP_SOCK, /* reg points to struct xdp_sock */
319 PTR_TO_BTF_ID, /* reg points to kernel struct */
322 /* The information passed from prog-specific *_is_valid_access
323 * back to the verifier.
325 struct bpf_insn_access_aux {
326 enum bpf_reg_type reg_type;
331 struct bpf_verifier_log *log; /* for verbose logs */
335 bpf_ctx_record_field_size(struct bpf_insn_access_aux *aux, u32 size)
337 aux->ctx_field_size = size;
340 struct bpf_prog_ops {
341 int (*test_run)(struct bpf_prog *prog, const union bpf_attr *kattr,
342 union bpf_attr __user *uattr);
345 struct bpf_verifier_ops {
346 /* return eBPF function prototype for verification */
347 const struct bpf_func_proto *
348 (*get_func_proto)(enum bpf_func_id func_id,
349 const struct bpf_prog *prog);
351 /* return true if 'size' wide access at offset 'off' within bpf_context
352 * with 'type' (read or write) is allowed
354 bool (*is_valid_access)(int off, int size, enum bpf_access_type type,
355 const struct bpf_prog *prog,
356 struct bpf_insn_access_aux *info);
357 int (*gen_prologue)(struct bpf_insn *insn, bool direct_write,
358 const struct bpf_prog *prog);
359 int (*gen_ld_abs)(const struct bpf_insn *orig,
360 struct bpf_insn *insn_buf);
361 u32 (*convert_ctx_access)(enum bpf_access_type type,
362 const struct bpf_insn *src,
363 struct bpf_insn *dst,
364 struct bpf_prog *prog, u32 *target_size);
365 int (*btf_struct_access)(struct bpf_verifier_log *log,
366 const struct btf_type *t, int off, int size,
367 enum bpf_access_type atype,
371 struct bpf_prog_offload_ops {
372 /* verifier basic callbacks */
373 int (*insn_hook)(struct bpf_verifier_env *env,
374 int insn_idx, int prev_insn_idx);
375 int (*finalize)(struct bpf_verifier_env *env);
376 /* verifier optimization callbacks (called after .finalize) */
377 int (*replace_insn)(struct bpf_verifier_env *env, u32 off,
378 struct bpf_insn *insn);
379 int (*remove_insns)(struct bpf_verifier_env *env, u32 off, u32 cnt);
380 /* program management callbacks */
381 int (*prepare)(struct bpf_prog *prog);
382 int (*translate)(struct bpf_prog *prog);
383 void (*destroy)(struct bpf_prog *prog);
386 struct bpf_prog_offload {
387 struct bpf_prog *prog;
388 struct net_device *netdev;
389 struct bpf_offload_dev *offdev;
391 struct list_head offloads;
398 enum bpf_cgroup_storage_type {
399 BPF_CGROUP_STORAGE_SHARED,
400 BPF_CGROUP_STORAGE_PERCPU,
401 __BPF_CGROUP_STORAGE_MAX
404 #define MAX_BPF_CGROUP_STORAGE_TYPE __BPF_CGROUP_STORAGE_MAX
406 /* The longest tracepoint has 12 args.
407 * See include/trace/bpf_probe.h
409 #define MAX_BPF_FUNC_ARGS 12
411 struct bpf_prog_stats {
414 struct u64_stats_sync syncp;
415 } __aligned(2 * sizeof(u64));
417 struct btf_func_model {
420 u8 arg_size[MAX_BPF_FUNC_ARGS];
423 /* Restore arguments before returning from trampoline to let original function
424 * continue executing. This flag is used for fentry progs when there are no
427 #define BPF_TRAMP_F_RESTORE_REGS BIT(0)
428 /* Call original function after fentry progs, but before fexit progs.
429 * Makes sense for fentry/fexit, normal calls and indirect calls.
431 #define BPF_TRAMP_F_CALL_ORIG BIT(1)
432 /* Skip current frame and return to parent. Makes sense for fentry/fexit
433 * programs only. Should not be used with normal calls and indirect calls.
435 #define BPF_TRAMP_F_SKIP_FRAME BIT(2)
437 /* Different use cases for BPF trampoline:
438 * 1. replace nop at the function entry (kprobe equivalent)
439 * flags = BPF_TRAMP_F_RESTORE_REGS
440 * fentry = a set of programs to run before returning from trampoline
442 * 2. replace nop at the function entry (kprobe + kretprobe equivalent)
443 * flags = BPF_TRAMP_F_CALL_ORIG | BPF_TRAMP_F_SKIP_FRAME
444 * orig_call = fentry_ip + MCOUNT_INSN_SIZE
445 * fentry = a set of program to run before calling original function
446 * fexit = a set of program to run after original function
448 * 3. replace direct call instruction anywhere in the function body
449 * or assign a function pointer for indirect call (like tcp_congestion_ops->cong_avoid)
451 * fentry = a set of programs to run before returning from trampoline
452 * With flags = BPF_TRAMP_F_CALL_ORIG
453 * orig_call = original callback addr or direct function addr
454 * fentry = a set of program to run before calling original function
455 * fexit = a set of program to run after original function
457 int arch_prepare_bpf_trampoline(void *image, void *image_end,
458 const struct btf_func_model *m, u32 flags,
459 struct bpf_prog **fentry_progs, int fentry_cnt,
460 struct bpf_prog **fexit_progs, int fexit_cnt,
462 /* these two functions are called from generated trampoline */
463 u64 notrace __bpf_prog_enter(void);
464 void notrace __bpf_prog_exit(struct bpf_prog *prog, u64 start);
466 enum bpf_tramp_prog_type {
470 BPF_TRAMP_REPLACE, /* more than MAX */
473 struct bpf_trampoline {
474 /* hlist for trampoline_table */
475 struct hlist_node hlist;
476 /* serializes access to fields of this trampoline */
481 struct btf_func_model model;
485 /* if !NULL this is BPF_PROG_TYPE_EXT program that extends another BPF
486 * program by replacing one of its functions. func.addr is the address
487 * of the function it replaced.
489 struct bpf_prog *extension_prog;
490 /* list of BPF programs using this trampoline */
491 struct hlist_head progs_hlist[BPF_TRAMP_MAX];
492 /* Number of attached programs. A counter per kind. */
493 int progs_cnt[BPF_TRAMP_MAX];
494 /* Executable image of trampoline */
499 #define BPF_DISPATCHER_MAX 48 /* Fits in 2048B */
501 struct bpf_dispatcher_prog {
502 struct bpf_prog *prog;
506 struct bpf_dispatcher {
507 /* dispatcher mutex */
510 struct bpf_dispatcher_prog progs[BPF_DISPATCHER_MAX];
516 static __always_inline unsigned int bpf_dispatcher_nopfunc(
518 const struct bpf_insn *insnsi,
519 unsigned int (*bpf_func)(const void *,
520 const struct bpf_insn *))
522 return bpf_func(ctx, insnsi);
524 #ifdef CONFIG_BPF_JIT
525 struct bpf_trampoline *bpf_trampoline_lookup(u64 key);
526 int bpf_trampoline_link_prog(struct bpf_prog *prog);
527 int bpf_trampoline_unlink_prog(struct bpf_prog *prog);
528 void bpf_trampoline_put(struct bpf_trampoline *tr);
529 #define BPF_DISPATCHER_INIT(name) { \
530 .mutex = __MUTEX_INITIALIZER(name.mutex), \
531 .func = &name##func, \
538 #define DEFINE_BPF_DISPATCHER(name) \
539 noinline unsigned int name##func( \
541 const struct bpf_insn *insnsi, \
542 unsigned int (*bpf_func)(const void *, \
543 const struct bpf_insn *)) \
545 return bpf_func(ctx, insnsi); \
547 EXPORT_SYMBOL(name##func); \
548 struct bpf_dispatcher name = BPF_DISPATCHER_INIT(name);
549 #define DECLARE_BPF_DISPATCHER(name) \
550 unsigned int name##func( \
552 const struct bpf_insn *insnsi, \
553 unsigned int (*bpf_func)(const void *, \
554 const struct bpf_insn *)); \
555 extern struct bpf_dispatcher name;
556 #define BPF_DISPATCHER_FUNC(name) name##func
557 #define BPF_DISPATCHER_PTR(name) (&name)
558 void bpf_dispatcher_change_prog(struct bpf_dispatcher *d, struct bpf_prog *from,
559 struct bpf_prog *to);
561 struct latch_tree_node tnode;
562 unsigned char data[];
564 #define BPF_IMAGE_SIZE (PAGE_SIZE - sizeof(struct bpf_image))
565 bool is_bpf_image_address(unsigned long address);
566 void *bpf_image_alloc(void);
568 static inline struct bpf_trampoline *bpf_trampoline_lookup(u64 key)
572 static inline int bpf_trampoline_link_prog(struct bpf_prog *prog)
576 static inline int bpf_trampoline_unlink_prog(struct bpf_prog *prog)
580 static inline void bpf_trampoline_put(struct bpf_trampoline *tr) {}
581 #define DEFINE_BPF_DISPATCHER(name)
582 #define DECLARE_BPF_DISPATCHER(name)
583 #define BPF_DISPATCHER_FUNC(name) bpf_dispatcher_nopfunc
584 #define BPF_DISPATCHER_PTR(name) NULL
585 static inline void bpf_dispatcher_change_prog(struct bpf_dispatcher *d,
586 struct bpf_prog *from,
587 struct bpf_prog *to) {}
588 static inline bool is_bpf_image_address(unsigned long address)
594 struct bpf_func_info_aux {
599 enum bpf_jit_poke_reason {
600 BPF_POKE_REASON_TAIL_CALL,
603 /* Descriptor of pokes pointing /into/ the JITed image. */
604 struct bpf_jit_poke_descriptor {
617 struct bpf_prog_aux {
625 u32 func_cnt; /* used by non-func prog as the number of func progs */
626 u32 func_idx; /* 0 for non-func prog, the index in func array for func prog */
627 u32 attach_btf_id; /* in-kernel BTF type id to attach to */
628 struct bpf_prog *linked_prog;
629 bool verifier_zext; /* Zero extensions has been inserted by verifier. */
630 bool offload_requested;
631 bool attach_btf_trace; /* true if attaching to BTF-enabled raw tp */
632 bool func_proto_unreliable;
633 enum bpf_tramp_prog_type trampoline_prog_type;
634 struct bpf_trampoline *trampoline;
635 struct hlist_node tramp_hlist;
636 /* BTF_KIND_FUNC_PROTO for valid attach_btf_id */
637 const struct btf_type *attach_func_proto;
638 /* function name for valid attach_btf_id */
639 const char *attach_func_name;
640 struct bpf_prog **func;
641 void *jit_data; /* JIT specific data. arch dependent */
642 struct bpf_jit_poke_descriptor *poke_tab;
644 struct latch_tree_node ksym_tnode;
645 struct list_head ksym_lnode;
646 const struct bpf_prog_ops *ops;
647 struct bpf_map **used_maps;
648 struct bpf_prog *prog;
649 struct user_struct *user;
650 u64 load_time; /* ns since boottime */
651 struct bpf_map *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE];
652 char name[BPF_OBJ_NAME_LEN];
653 #ifdef CONFIG_SECURITY
656 struct bpf_prog_offload *offload;
658 struct bpf_func_info *func_info;
659 struct bpf_func_info_aux *func_info_aux;
660 /* bpf_line_info loaded from userspace. linfo->insn_off
661 * has the xlated insn offset.
662 * Both the main and sub prog share the same linfo.
663 * The subprog can access its first linfo by
664 * using the linfo_idx.
666 struct bpf_line_info *linfo;
667 /* jited_linfo is the jited addr of the linfo. It has a
668 * one to one mapping to linfo:
669 * jited_linfo[i] is the jited addr for the linfo[i]->insn_off.
670 * Both the main and sub prog share the same jited_linfo.
671 * The subprog can access its first jited_linfo by
672 * using the linfo_idx.
677 /* subprog can use linfo_idx to access its first linfo and
679 * main prog always has linfo_idx == 0
683 struct exception_table_entry *extable;
684 struct bpf_prog_stats __percpu *stats;
686 struct work_struct work;
691 struct bpf_array_aux {
692 /* 'Ownership' of prog array is claimed by the first program that
693 * is going to use this map or by the first program which FD is
694 * stored in the map to make sure that all callers and callees have
695 * the same prog type and JITed flag.
697 enum bpf_prog_type type;
699 /* Programs with direct jumps into programs part of this array. */
700 struct list_head poke_progs;
702 struct mutex poke_mutex;
703 struct work_struct work;
706 struct bpf_struct_ops_value;
710 #define BPF_STRUCT_OPS_MAX_NR_MEMBERS 64
711 struct bpf_struct_ops {
712 const struct bpf_verifier_ops *verifier_ops;
713 int (*init)(struct btf *btf);
714 int (*check_member)(const struct btf_type *t,
715 const struct btf_member *member);
716 int (*init_member)(const struct btf_type *t,
717 const struct btf_member *member,
718 void *kdata, const void *udata);
719 int (*reg)(void *kdata);
720 void (*unreg)(void *kdata);
721 const struct btf_type *type;
722 const struct btf_type *value_type;
724 struct btf_func_model func_models[BPF_STRUCT_OPS_MAX_NR_MEMBERS];
729 #if defined(CONFIG_BPF_JIT) && defined(CONFIG_BPF_SYSCALL)
730 #define BPF_MODULE_OWNER ((void *)((0xeB9FUL << 2) + POISON_POINTER_DELTA))
731 const struct bpf_struct_ops *bpf_struct_ops_find(u32 type_id);
732 void bpf_struct_ops_init(struct btf *btf, struct bpf_verifier_log *log);
733 bool bpf_struct_ops_get(const void *kdata);
734 void bpf_struct_ops_put(const void *kdata);
735 int bpf_struct_ops_map_sys_lookup_elem(struct bpf_map *map, void *key,
737 static inline bool bpf_try_module_get(const void *data, struct module *owner)
739 if (owner == BPF_MODULE_OWNER)
740 return bpf_struct_ops_get(data);
742 return try_module_get(owner);
744 static inline void bpf_module_put(const void *data, struct module *owner)
746 if (owner == BPF_MODULE_OWNER)
747 bpf_struct_ops_put(data);
752 static inline const struct bpf_struct_ops *bpf_struct_ops_find(u32 type_id)
756 static inline void bpf_struct_ops_init(struct btf *btf,
757 struct bpf_verifier_log *log)
760 static inline bool bpf_try_module_get(const void *data, struct module *owner)
762 return try_module_get(owner);
764 static inline void bpf_module_put(const void *data, struct module *owner)
768 static inline int bpf_struct_ops_map_sys_lookup_elem(struct bpf_map *map,
780 struct bpf_array_aux *aux;
782 char value[0] __aligned(8);
783 void *ptrs[0] __aligned(8);
784 void __percpu *pptrs[0] __aligned(8);
788 #define BPF_COMPLEXITY_LIMIT_INSNS 1000000 /* yes. 1M insns */
789 #define MAX_TAIL_CALL_CNT 32
791 #define BPF_F_ACCESS_MASK (BPF_F_RDONLY | \
792 BPF_F_RDONLY_PROG | \
796 #define BPF_MAP_CAN_READ BIT(0)
797 #define BPF_MAP_CAN_WRITE BIT(1)
799 static inline u32 bpf_map_flags_to_cap(struct bpf_map *map)
801 u32 access_flags = map->map_flags & (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG);
803 /* Combination of BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG is
806 if (access_flags & BPF_F_RDONLY_PROG)
807 return BPF_MAP_CAN_READ;
808 else if (access_flags & BPF_F_WRONLY_PROG)
809 return BPF_MAP_CAN_WRITE;
811 return BPF_MAP_CAN_READ | BPF_MAP_CAN_WRITE;
814 static inline bool bpf_map_flags_access_ok(u32 access_flags)
816 return (access_flags & (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG)) !=
817 (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG);
820 struct bpf_event_entry {
821 struct perf_event *event;
822 struct file *perf_file;
823 struct file *map_file;
827 bool bpf_prog_array_compatible(struct bpf_array *array, const struct bpf_prog *fp);
828 int bpf_prog_calc_tag(struct bpf_prog *fp);
829 const char *kernel_type_name(u32 btf_type_id);
831 const struct bpf_func_proto *bpf_get_trace_printk_proto(void);
833 typedef unsigned long (*bpf_ctx_copy_t)(void *dst, const void *src,
834 unsigned long off, unsigned long len);
835 typedef u32 (*bpf_convert_ctx_access_t)(enum bpf_access_type type,
836 const struct bpf_insn *src,
837 struct bpf_insn *dst,
838 struct bpf_prog *prog,
841 u64 bpf_event_output(struct bpf_map *map, u64 flags, void *meta, u64 meta_size,
842 void *ctx, u64 ctx_size, bpf_ctx_copy_t ctx_copy);
844 /* an array of programs to be executed under rcu_lock.
847 * ret = BPF_PROG_RUN_ARRAY(&bpf_prog_array, ctx, BPF_PROG_RUN);
849 * the structure returned by bpf_prog_array_alloc() should be populated
850 * with program pointers and the last pointer must be NULL.
851 * The user has to keep refcnt on the program and make sure the program
852 * is removed from the array before bpf_prog_put().
853 * The 'struct bpf_prog_array *' should only be replaced with xchg()
854 * since other cpus are walking the array of pointers in parallel.
856 struct bpf_prog_array_item {
857 struct bpf_prog *prog;
858 struct bpf_cgroup_storage *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE];
861 struct bpf_prog_array {
863 struct bpf_prog_array_item items[0];
866 struct bpf_prog_array *bpf_prog_array_alloc(u32 prog_cnt, gfp_t flags);
867 void bpf_prog_array_free(struct bpf_prog_array *progs);
868 int bpf_prog_array_length(struct bpf_prog_array *progs);
869 bool bpf_prog_array_is_empty(struct bpf_prog_array *array);
870 int bpf_prog_array_copy_to_user(struct bpf_prog_array *progs,
871 __u32 __user *prog_ids, u32 cnt);
873 void bpf_prog_array_delete_safe(struct bpf_prog_array *progs,
874 struct bpf_prog *old_prog);
875 int bpf_prog_array_copy_info(struct bpf_prog_array *array,
876 u32 *prog_ids, u32 request_cnt,
878 int bpf_prog_array_copy(struct bpf_prog_array *old_array,
879 struct bpf_prog *exclude_prog,
880 struct bpf_prog *include_prog,
881 struct bpf_prog_array **new_array);
883 #define __BPF_PROG_RUN_ARRAY(array, ctx, func, check_non_null) \
885 struct bpf_prog_array_item *_item; \
886 struct bpf_prog *_prog; \
887 struct bpf_prog_array *_array; \
891 _array = rcu_dereference(array); \
892 if (unlikely(check_non_null && !_array))\
894 _item = &_array->items[0]; \
895 while ((_prog = READ_ONCE(_item->prog))) { \
896 bpf_cgroup_storage_set(_item->cgroup_storage); \
897 _ret &= func(_prog, ctx); \
906 /* To be used by __cgroup_bpf_run_filter_skb for EGRESS BPF progs
907 * so BPF programs can request cwr for TCP packets.
909 * Current cgroup skb programs can only return 0 or 1 (0 to drop the
910 * packet. This macro changes the behavior so the low order bit
911 * indicates whether the packet should be dropped (0) or not (1)
912 * and the next bit is a congestion notification bit. This could be
913 * used by TCP to call tcp_enter_cwr()
915 * Hence, new allowed return values of CGROUP EGRESS BPF programs are:
918 * 2: drop packet and cn
919 * 3: keep packet and cn
921 * This macro then converts it to one of the NET_XMIT or an error
922 * code that is then interpreted as drop packet (and no cn):
923 * 0: NET_XMIT_SUCCESS skb should be transmitted
924 * 1: NET_XMIT_DROP skb should be dropped and cn
925 * 2: NET_XMIT_CN skb should be transmitted and cn
926 * 3: -EPERM skb should be dropped
928 #define BPF_PROG_CGROUP_INET_EGRESS_RUN_ARRAY(array, ctx, func) \
930 struct bpf_prog_array_item *_item; \
931 struct bpf_prog *_prog; \
932 struct bpf_prog_array *_array; \
938 _array = rcu_dereference(array); \
939 _item = &_array->items[0]; \
940 while ((_prog = READ_ONCE(_item->prog))) { \
941 bpf_cgroup_storage_set(_item->cgroup_storage); \
942 ret = func(_prog, ctx); \
950 _ret = (_cn ? NET_XMIT_CN : NET_XMIT_SUCCESS); \
952 _ret = (_cn ? NET_XMIT_DROP : -EPERM); \
956 #define BPF_PROG_RUN_ARRAY(array, ctx, func) \
957 __BPF_PROG_RUN_ARRAY(array, ctx, func, false)
959 #define BPF_PROG_RUN_ARRAY_CHECK(array, ctx, func) \
960 __BPF_PROG_RUN_ARRAY(array, ctx, func, true)
962 #ifdef CONFIG_BPF_SYSCALL
963 DECLARE_PER_CPU(int, bpf_prog_active);
965 extern const struct file_operations bpf_map_fops;
966 extern const struct file_operations bpf_prog_fops;
968 #define BPF_PROG_TYPE(_id, _name, prog_ctx_type, kern_ctx_type) \
969 extern const struct bpf_prog_ops _name ## _prog_ops; \
970 extern const struct bpf_verifier_ops _name ## _verifier_ops;
971 #define BPF_MAP_TYPE(_id, _ops) \
972 extern const struct bpf_map_ops _ops;
973 #include <linux/bpf_types.h>
977 extern const struct bpf_prog_ops bpf_offload_prog_ops;
978 extern const struct bpf_verifier_ops tc_cls_act_analyzer_ops;
979 extern const struct bpf_verifier_ops xdp_analyzer_ops;
981 struct bpf_prog *bpf_prog_get(u32 ufd);
982 struct bpf_prog *bpf_prog_get_type_dev(u32 ufd, enum bpf_prog_type type,
984 void bpf_prog_add(struct bpf_prog *prog, int i);
985 void bpf_prog_sub(struct bpf_prog *prog, int i);
986 void bpf_prog_inc(struct bpf_prog *prog);
987 struct bpf_prog * __must_check bpf_prog_inc_not_zero(struct bpf_prog *prog);
988 void bpf_prog_put(struct bpf_prog *prog);
989 int __bpf_prog_charge(struct user_struct *user, u32 pages);
990 void __bpf_prog_uncharge(struct user_struct *user, u32 pages);
991 void __bpf_free_used_maps(struct bpf_prog_aux *aux,
992 struct bpf_map **used_maps, u32 len);
994 void bpf_prog_free_id(struct bpf_prog *prog, bool do_idr_lock);
995 void bpf_map_free_id(struct bpf_map *map, bool do_idr_lock);
997 struct bpf_map *bpf_map_get_with_uref(u32 ufd);
998 struct bpf_map *__bpf_map_get(struct fd f);
999 void bpf_map_inc(struct bpf_map *map);
1000 void bpf_map_inc_with_uref(struct bpf_map *map);
1001 struct bpf_map * __must_check bpf_map_inc_not_zero(struct bpf_map *map);
1002 void bpf_map_put_with_uref(struct bpf_map *map);
1003 void bpf_map_put(struct bpf_map *map);
1004 int bpf_map_charge_memlock(struct bpf_map *map, u32 pages);
1005 void bpf_map_uncharge_memlock(struct bpf_map *map, u32 pages);
1006 int bpf_map_charge_init(struct bpf_map_memory *mem, u64 size);
1007 void bpf_map_charge_finish(struct bpf_map_memory *mem);
1008 void bpf_map_charge_move(struct bpf_map_memory *dst,
1009 struct bpf_map_memory *src);
1010 void *bpf_map_area_alloc(u64 size, int numa_node);
1011 void *bpf_map_area_mmapable_alloc(u64 size, int numa_node);
1012 void bpf_map_area_free(void *base);
1013 void bpf_map_init_from_attr(struct bpf_map *map, union bpf_attr *attr);
1014 int generic_map_lookup_batch(struct bpf_map *map,
1015 const union bpf_attr *attr,
1016 union bpf_attr __user *uattr);
1017 int generic_map_update_batch(struct bpf_map *map,
1018 const union bpf_attr *attr,
1019 union bpf_attr __user *uattr);
1020 int generic_map_delete_batch(struct bpf_map *map,
1021 const union bpf_attr *attr,
1022 union bpf_attr __user *uattr);
1024 extern int sysctl_unprivileged_bpf_disabled;
1026 int bpf_map_new_fd(struct bpf_map *map, int flags);
1027 int bpf_prog_new_fd(struct bpf_prog *prog);
1029 int bpf_obj_pin_user(u32 ufd, const char __user *pathname);
1030 int bpf_obj_get_user(const char __user *pathname, int flags);
1032 int bpf_percpu_hash_copy(struct bpf_map *map, void *key, void *value);
1033 int bpf_percpu_array_copy(struct bpf_map *map, void *key, void *value);
1034 int bpf_percpu_hash_update(struct bpf_map *map, void *key, void *value,
1036 int bpf_percpu_array_update(struct bpf_map *map, void *key, void *value,
1039 int bpf_stackmap_copy(struct bpf_map *map, void *key, void *value);
1041 int bpf_fd_array_map_update_elem(struct bpf_map *map, struct file *map_file,
1042 void *key, void *value, u64 map_flags);
1043 int bpf_fd_array_map_lookup_elem(struct bpf_map *map, void *key, u32 *value);
1044 int bpf_fd_htab_map_update_elem(struct bpf_map *map, struct file *map_file,
1045 void *key, void *value, u64 map_flags);
1046 int bpf_fd_htab_map_lookup_elem(struct bpf_map *map, void *key, u32 *value);
1048 int bpf_get_file_flag(int flags);
1049 int bpf_check_uarg_tail_zero(void __user *uaddr, size_t expected_size,
1050 size_t actual_size);
1052 /* memcpy that is used with 8-byte aligned pointers, power-of-8 size and
1053 * forced to use 'long' read/writes to try to atomically copy long counters.
1054 * Best-effort only. No barriers here, since it _will_ race with concurrent
1055 * updates from BPF programs. Called from bpf syscall and mostly used with
1056 * size 8 or 16 bytes, so ask compiler to inline it.
1058 static inline void bpf_long_memcpy(void *dst, const void *src, u32 size)
1060 const long *lsrc = src;
1063 size /= sizeof(long);
1068 /* verify correctness of eBPF program */
1069 int bpf_check(struct bpf_prog **fp, union bpf_attr *attr,
1070 union bpf_attr __user *uattr);
1071 void bpf_patch_call_args(struct bpf_insn *insn, u32 stack_depth);
1077 struct bpf_dtab_netdev *__dev_map_lookup_elem(struct bpf_map *map, u32 key);
1078 struct bpf_dtab_netdev *__dev_map_hash_lookup_elem(struct bpf_map *map, u32 key);
1079 void __dev_flush(void);
1080 int dev_xdp_enqueue(struct net_device *dev, struct xdp_buff *xdp,
1081 struct net_device *dev_rx);
1082 int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp,
1083 struct net_device *dev_rx);
1084 int dev_map_generic_redirect(struct bpf_dtab_netdev *dst, struct sk_buff *skb,
1085 struct bpf_prog *xdp_prog);
1087 struct bpf_cpu_map_entry *__cpu_map_lookup_elem(struct bpf_map *map, u32 key);
1088 void __cpu_map_flush(void);
1089 int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu, struct xdp_buff *xdp,
1090 struct net_device *dev_rx);
1092 /* Return map's numa specified by userspace */
1093 static inline int bpf_map_attr_numa_node(const union bpf_attr *attr)
1095 return (attr->map_flags & BPF_F_NUMA_NODE) ?
1096 attr->numa_node : NUMA_NO_NODE;
1099 struct bpf_prog *bpf_prog_get_type_path(const char *name, enum bpf_prog_type type);
1100 int array_map_alloc_check(union bpf_attr *attr);
1102 int bpf_prog_test_run_xdp(struct bpf_prog *prog, const union bpf_attr *kattr,
1103 union bpf_attr __user *uattr);
1104 int bpf_prog_test_run_skb(struct bpf_prog *prog, const union bpf_attr *kattr,
1105 union bpf_attr __user *uattr);
1106 int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog,
1107 const union bpf_attr *kattr,
1108 union bpf_attr __user *uattr);
1109 bool btf_ctx_access(int off, int size, enum bpf_access_type type,
1110 const struct bpf_prog *prog,
1111 struct bpf_insn_access_aux *info);
1112 int btf_struct_access(struct bpf_verifier_log *log,
1113 const struct btf_type *t, int off, int size,
1114 enum bpf_access_type atype,
1116 int btf_resolve_helper_id(struct bpf_verifier_log *log,
1117 const struct bpf_func_proto *fn, int);
1119 int btf_distill_func_proto(struct bpf_verifier_log *log,
1121 const struct btf_type *func_proto,
1122 const char *func_name,
1123 struct btf_func_model *m);
1125 struct bpf_reg_state;
1126 int btf_check_func_arg_match(struct bpf_verifier_env *env, int subprog,
1127 struct bpf_reg_state *regs);
1128 int btf_prepare_func_args(struct bpf_verifier_env *env, int subprog,
1129 struct bpf_reg_state *reg);
1130 int btf_check_type_match(struct bpf_verifier_env *env, struct bpf_prog *prog,
1131 struct btf *btf, const struct btf_type *t);
1133 struct bpf_prog *bpf_prog_by_id(u32 id);
1135 #else /* !CONFIG_BPF_SYSCALL */
1136 static inline struct bpf_prog *bpf_prog_get(u32 ufd)
1138 return ERR_PTR(-EOPNOTSUPP);
1141 static inline struct bpf_prog *bpf_prog_get_type_dev(u32 ufd,
1142 enum bpf_prog_type type,
1145 return ERR_PTR(-EOPNOTSUPP);
1148 static inline void bpf_prog_add(struct bpf_prog *prog, int i)
1152 static inline void bpf_prog_sub(struct bpf_prog *prog, int i)
1156 static inline void bpf_prog_put(struct bpf_prog *prog)
1160 static inline void bpf_prog_inc(struct bpf_prog *prog)
1164 static inline struct bpf_prog *__must_check
1165 bpf_prog_inc_not_zero(struct bpf_prog *prog)
1167 return ERR_PTR(-EOPNOTSUPP);
1170 static inline int __bpf_prog_charge(struct user_struct *user, u32 pages)
1175 static inline void __bpf_prog_uncharge(struct user_struct *user, u32 pages)
1179 static inline int bpf_obj_get_user(const char __user *pathname, int flags)
1184 static inline struct net_device *__dev_map_lookup_elem(struct bpf_map *map,
1190 static inline struct net_device *__dev_map_hash_lookup_elem(struct bpf_map *map,
1196 static inline void __dev_flush(void)
1201 struct bpf_dtab_netdev;
1204 int dev_xdp_enqueue(struct net_device *dev, struct xdp_buff *xdp,
1205 struct net_device *dev_rx)
1211 int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp,
1212 struct net_device *dev_rx)
1219 static inline int dev_map_generic_redirect(struct bpf_dtab_netdev *dst,
1220 struct sk_buff *skb,
1221 struct bpf_prog *xdp_prog)
1227 struct bpf_cpu_map_entry *__cpu_map_lookup_elem(struct bpf_map *map, u32 key)
1232 static inline void __cpu_map_flush(void)
1236 static inline int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu,
1237 struct xdp_buff *xdp,
1238 struct net_device *dev_rx)
1243 static inline struct bpf_prog *bpf_prog_get_type_path(const char *name,
1244 enum bpf_prog_type type)
1246 return ERR_PTR(-EOPNOTSUPP);
1249 static inline int bpf_prog_test_run_xdp(struct bpf_prog *prog,
1250 const union bpf_attr *kattr,
1251 union bpf_attr __user *uattr)
1256 static inline int bpf_prog_test_run_skb(struct bpf_prog *prog,
1257 const union bpf_attr *kattr,
1258 union bpf_attr __user *uattr)
1263 static inline int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog,
1264 const union bpf_attr *kattr,
1265 union bpf_attr __user *uattr)
1270 static inline void bpf_map_put(struct bpf_map *map)
1274 static inline struct bpf_prog *bpf_prog_by_id(u32 id)
1276 return ERR_PTR(-ENOTSUPP);
1278 #endif /* CONFIG_BPF_SYSCALL */
1280 static inline struct bpf_prog *bpf_prog_get_type(u32 ufd,
1281 enum bpf_prog_type type)
1283 return bpf_prog_get_type_dev(ufd, type, false);
1286 bool bpf_prog_get_ok(struct bpf_prog *, enum bpf_prog_type *, bool);
1288 int bpf_prog_offload_compile(struct bpf_prog *prog);
1289 void bpf_prog_offload_destroy(struct bpf_prog *prog);
1290 int bpf_prog_offload_info_fill(struct bpf_prog_info *info,
1291 struct bpf_prog *prog);
1293 int bpf_map_offload_info_fill(struct bpf_map_info *info, struct bpf_map *map);
1295 int bpf_map_offload_lookup_elem(struct bpf_map *map, void *key, void *value);
1296 int bpf_map_offload_update_elem(struct bpf_map *map,
1297 void *key, void *value, u64 flags);
1298 int bpf_map_offload_delete_elem(struct bpf_map *map, void *key);
1299 int bpf_map_offload_get_next_key(struct bpf_map *map,
1300 void *key, void *next_key);
1302 bool bpf_offload_prog_map_match(struct bpf_prog *prog, struct bpf_map *map);
1304 struct bpf_offload_dev *
1305 bpf_offload_dev_create(const struct bpf_prog_offload_ops *ops, void *priv);
1306 void bpf_offload_dev_destroy(struct bpf_offload_dev *offdev);
1307 void *bpf_offload_dev_priv(struct bpf_offload_dev *offdev);
1308 int bpf_offload_dev_netdev_register(struct bpf_offload_dev *offdev,
1309 struct net_device *netdev);
1310 void bpf_offload_dev_netdev_unregister(struct bpf_offload_dev *offdev,
1311 struct net_device *netdev);
1312 bool bpf_offload_dev_match(struct bpf_prog *prog, struct net_device *netdev);
1314 #if defined(CONFIG_NET) && defined(CONFIG_BPF_SYSCALL)
1315 int bpf_prog_offload_init(struct bpf_prog *prog, union bpf_attr *attr);
1317 static inline bool bpf_prog_is_dev_bound(const struct bpf_prog_aux *aux)
1319 return aux->offload_requested;
1322 static inline bool bpf_map_is_dev_bound(struct bpf_map *map)
1324 return unlikely(map->ops == &bpf_map_offload_ops);
1327 struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr);
1328 void bpf_map_offload_map_free(struct bpf_map *map);
1330 static inline int bpf_prog_offload_init(struct bpf_prog *prog,
1331 union bpf_attr *attr)
1336 static inline bool bpf_prog_is_dev_bound(struct bpf_prog_aux *aux)
1341 static inline bool bpf_map_is_dev_bound(struct bpf_map *map)
1346 static inline struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr)
1348 return ERR_PTR(-EOPNOTSUPP);
1351 static inline void bpf_map_offload_map_free(struct bpf_map *map)
1354 #endif /* CONFIG_NET && CONFIG_BPF_SYSCALL */
1356 #if defined(CONFIG_BPF_STREAM_PARSER)
1357 int sock_map_prog_update(struct bpf_map *map, struct bpf_prog *prog, u32 which);
1358 int sock_map_get_from_fd(const union bpf_attr *attr, struct bpf_prog *prog);
1360 static inline int sock_map_prog_update(struct bpf_map *map,
1361 struct bpf_prog *prog, u32 which)
1366 static inline int sock_map_get_from_fd(const union bpf_attr *attr,
1367 struct bpf_prog *prog)
1373 #if defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL)
1374 void bpf_sk_reuseport_detach(struct sock *sk);
1375 int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map, void *key,
1377 int bpf_fd_reuseport_array_update_elem(struct bpf_map *map, void *key,
1378 void *value, u64 map_flags);
1380 static inline void bpf_sk_reuseport_detach(struct sock *sk)
1384 #ifdef CONFIG_BPF_SYSCALL
1385 static inline int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map,
1386 void *key, void *value)
1391 static inline int bpf_fd_reuseport_array_update_elem(struct bpf_map *map,
1392 void *key, void *value,
1397 #endif /* CONFIG_BPF_SYSCALL */
1398 #endif /* defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL) */
1400 /* verifier prototypes for helper functions called from eBPF programs */
1401 extern const struct bpf_func_proto bpf_map_lookup_elem_proto;
1402 extern const struct bpf_func_proto bpf_map_update_elem_proto;
1403 extern const struct bpf_func_proto bpf_map_delete_elem_proto;
1404 extern const struct bpf_func_proto bpf_map_push_elem_proto;
1405 extern const struct bpf_func_proto bpf_map_pop_elem_proto;
1406 extern const struct bpf_func_proto bpf_map_peek_elem_proto;
1408 extern const struct bpf_func_proto bpf_get_prandom_u32_proto;
1409 extern const struct bpf_func_proto bpf_get_smp_processor_id_proto;
1410 extern const struct bpf_func_proto bpf_get_numa_node_id_proto;
1411 extern const struct bpf_func_proto bpf_tail_call_proto;
1412 extern const struct bpf_func_proto bpf_ktime_get_ns_proto;
1413 extern const struct bpf_func_proto bpf_get_current_pid_tgid_proto;
1414 extern const struct bpf_func_proto bpf_get_current_uid_gid_proto;
1415 extern const struct bpf_func_proto bpf_get_current_comm_proto;
1416 extern const struct bpf_func_proto bpf_get_stackid_proto;
1417 extern const struct bpf_func_proto bpf_get_stack_proto;
1418 extern const struct bpf_func_proto bpf_sock_map_update_proto;
1419 extern const struct bpf_func_proto bpf_sock_hash_update_proto;
1420 extern const struct bpf_func_proto bpf_get_current_cgroup_id_proto;
1421 extern const struct bpf_func_proto bpf_msg_redirect_hash_proto;
1422 extern const struct bpf_func_proto bpf_msg_redirect_map_proto;
1423 extern const struct bpf_func_proto bpf_sk_redirect_hash_proto;
1424 extern const struct bpf_func_proto bpf_sk_redirect_map_proto;
1425 extern const struct bpf_func_proto bpf_spin_lock_proto;
1426 extern const struct bpf_func_proto bpf_spin_unlock_proto;
1427 extern const struct bpf_func_proto bpf_get_local_storage_proto;
1428 extern const struct bpf_func_proto bpf_strtol_proto;
1429 extern const struct bpf_func_proto bpf_strtoul_proto;
1430 extern const struct bpf_func_proto bpf_tcp_sock_proto;
1431 extern const struct bpf_func_proto bpf_jiffies64_proto;
1433 /* Shared helpers among cBPF and eBPF. */
1434 void bpf_user_rnd_init_once(void);
1435 u64 bpf_user_rnd_u32(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
1437 #if defined(CONFIG_NET)
1438 bool bpf_sock_common_is_valid_access(int off, int size,
1439 enum bpf_access_type type,
1440 struct bpf_insn_access_aux *info);
1441 bool bpf_sock_is_valid_access(int off, int size, enum bpf_access_type type,
1442 struct bpf_insn_access_aux *info);
1443 u32 bpf_sock_convert_ctx_access(enum bpf_access_type type,
1444 const struct bpf_insn *si,
1445 struct bpf_insn *insn_buf,
1446 struct bpf_prog *prog,
1449 static inline bool bpf_sock_common_is_valid_access(int off, int size,
1450 enum bpf_access_type type,
1451 struct bpf_insn_access_aux *info)
1455 static inline bool bpf_sock_is_valid_access(int off, int size,
1456 enum bpf_access_type type,
1457 struct bpf_insn_access_aux *info)
1461 static inline u32 bpf_sock_convert_ctx_access(enum bpf_access_type type,
1462 const struct bpf_insn *si,
1463 struct bpf_insn *insn_buf,
1464 struct bpf_prog *prog,
1472 struct sk_reuseport_kern {
1473 struct sk_buff *skb;
1475 struct sock *selected_sk;
1481 bool bpf_tcp_sock_is_valid_access(int off, int size, enum bpf_access_type type,
1482 struct bpf_insn_access_aux *info);
1484 u32 bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type,
1485 const struct bpf_insn *si,
1486 struct bpf_insn *insn_buf,
1487 struct bpf_prog *prog,
1490 bool bpf_xdp_sock_is_valid_access(int off, int size, enum bpf_access_type type,
1491 struct bpf_insn_access_aux *info);
1493 u32 bpf_xdp_sock_convert_ctx_access(enum bpf_access_type type,
1494 const struct bpf_insn *si,
1495 struct bpf_insn *insn_buf,
1496 struct bpf_prog *prog,
1499 static inline bool bpf_tcp_sock_is_valid_access(int off, int size,
1500 enum bpf_access_type type,
1501 struct bpf_insn_access_aux *info)
1506 static inline u32 bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type,
1507 const struct bpf_insn *si,
1508 struct bpf_insn *insn_buf,
1509 struct bpf_prog *prog,
1514 static inline bool bpf_xdp_sock_is_valid_access(int off, int size,
1515 enum bpf_access_type type,
1516 struct bpf_insn_access_aux *info)
1521 static inline u32 bpf_xdp_sock_convert_ctx_access(enum bpf_access_type type,
1522 const struct bpf_insn *si,
1523 struct bpf_insn *insn_buf,
1524 struct bpf_prog *prog,
1529 #endif /* CONFIG_INET */
1531 enum bpf_text_poke_type {
1536 int bpf_arch_text_poke(void *ip, enum bpf_text_poke_type t,
1537 void *addr1, void *addr2);
1539 #endif /* _LINUX_BPF_H */