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>
21 #include <linux/kallsyms.h>
23 struct bpf_verifier_env;
24 struct bpf_verifier_log;
33 struct exception_table_entry;
35 extern struct idr btf_idr;
36 extern spinlock_t btf_idr_lock;
38 /* map is generic key/value storage optionally accesible by eBPF programs */
40 /* funcs callable from userspace (via syscall) */
41 int (*map_alloc_check)(union bpf_attr *attr);
42 struct bpf_map *(*map_alloc)(union bpf_attr *attr);
43 void (*map_release)(struct bpf_map *map, struct file *map_file);
44 void (*map_free)(struct bpf_map *map);
45 int (*map_get_next_key)(struct bpf_map *map, void *key, void *next_key);
46 void (*map_release_uref)(struct bpf_map *map);
47 void *(*map_lookup_elem_sys_only)(struct bpf_map *map, void *key);
48 int (*map_lookup_batch)(struct bpf_map *map, const union bpf_attr *attr,
49 union bpf_attr __user *uattr);
50 int (*map_lookup_and_delete_batch)(struct bpf_map *map,
51 const union bpf_attr *attr,
52 union bpf_attr __user *uattr);
53 int (*map_update_batch)(struct bpf_map *map, const union bpf_attr *attr,
54 union bpf_attr __user *uattr);
55 int (*map_delete_batch)(struct bpf_map *map, const union bpf_attr *attr,
56 union bpf_attr __user *uattr);
58 /* funcs callable from userspace and from eBPF programs */
59 void *(*map_lookup_elem)(struct bpf_map *map, void *key);
60 int (*map_update_elem)(struct bpf_map *map, void *key, void *value, u64 flags);
61 int (*map_delete_elem)(struct bpf_map *map, void *key);
62 int (*map_push_elem)(struct bpf_map *map, void *value, u64 flags);
63 int (*map_pop_elem)(struct bpf_map *map, void *value);
64 int (*map_peek_elem)(struct bpf_map *map, void *value);
66 /* funcs called by prog_array and perf_event_array map */
67 void *(*map_fd_get_ptr)(struct bpf_map *map, struct file *map_file,
69 void (*map_fd_put_ptr)(void *ptr);
70 u32 (*map_gen_lookup)(struct bpf_map *map, struct bpf_insn *insn_buf);
71 u32 (*map_fd_sys_lookup_elem)(void *ptr);
72 void (*map_seq_show_elem)(struct bpf_map *map, void *key,
74 int (*map_check_btf)(const struct bpf_map *map,
75 const struct btf *btf,
76 const struct btf_type *key_type,
77 const struct btf_type *value_type);
79 /* Prog poke tracking helpers. */
80 int (*map_poke_track)(struct bpf_map *map, struct bpf_prog_aux *aux);
81 void (*map_poke_untrack)(struct bpf_map *map, struct bpf_prog_aux *aux);
82 void (*map_poke_run)(struct bpf_map *map, u32 key, struct bpf_prog *old,
83 struct bpf_prog *new);
85 /* Direct value access helpers. */
86 int (*map_direct_value_addr)(const struct bpf_map *map,
88 int (*map_direct_value_meta)(const struct bpf_map *map,
90 int (*map_mmap)(struct bpf_map *map, struct vm_area_struct *vma);
93 struct bpf_map_memory {
95 struct user_struct *user;
99 /* The first two cachelines with read-mostly members of which some
100 * are also accessed in fast-path (e.g. ops, max_entries).
102 const struct bpf_map_ops *ops ____cacheline_aligned;
103 struct bpf_map *inner_map_meta;
104 #ifdef CONFIG_SECURITY
107 enum bpf_map_type map_type;
112 int spin_lock_off; /* >=0 valid offset, <0 error */
116 u32 btf_value_type_id;
118 struct bpf_map_memory memory;
119 char name[BPF_OBJ_NAME_LEN];
120 u32 btf_vmlinux_value_type_id;
122 bool frozen; /* write-once; write-protected by freeze_mutex */
125 /* The 3rd and 4th cacheline with misc members to avoid false sharing
126 * particularly with refcounting.
128 atomic64_t refcnt ____cacheline_aligned;
130 struct work_struct work;
131 struct mutex freeze_mutex;
132 u64 writecnt; /* writable mmap cnt; protected by freeze_mutex */
135 static inline bool map_value_has_spin_lock(const struct bpf_map *map)
137 return map->spin_lock_off >= 0;
140 static inline void check_and_init_map_lock(struct bpf_map *map, void *dst)
142 if (likely(!map_value_has_spin_lock(map)))
144 *(struct bpf_spin_lock *)(dst + map->spin_lock_off) =
145 (struct bpf_spin_lock){};
148 /* copy everything but bpf_spin_lock */
149 static inline void copy_map_value(struct bpf_map *map, void *dst, void *src)
151 if (unlikely(map_value_has_spin_lock(map))) {
152 u32 off = map->spin_lock_off;
154 memcpy(dst, src, off);
155 memcpy(dst + off + sizeof(struct bpf_spin_lock),
156 src + off + sizeof(struct bpf_spin_lock),
157 map->value_size - off - sizeof(struct bpf_spin_lock));
159 memcpy(dst, src, map->value_size);
162 void copy_map_value_locked(struct bpf_map *map, void *dst, void *src,
164 int bpf_obj_name_cpy(char *dst, const char *src, unsigned int size);
166 struct bpf_offload_dev;
167 struct bpf_offloaded_map;
169 struct bpf_map_dev_ops {
170 int (*map_get_next_key)(struct bpf_offloaded_map *map,
171 void *key, void *next_key);
172 int (*map_lookup_elem)(struct bpf_offloaded_map *map,
173 void *key, void *value);
174 int (*map_update_elem)(struct bpf_offloaded_map *map,
175 void *key, void *value, u64 flags);
176 int (*map_delete_elem)(struct bpf_offloaded_map *map, void *key);
179 struct bpf_offloaded_map {
181 struct net_device *netdev;
182 const struct bpf_map_dev_ops *dev_ops;
184 struct list_head offloads;
187 static inline struct bpf_offloaded_map *map_to_offmap(struct bpf_map *map)
189 return container_of(map, struct bpf_offloaded_map, map);
192 static inline bool bpf_map_offload_neutral(const struct bpf_map *map)
194 return map->map_type == BPF_MAP_TYPE_PERF_EVENT_ARRAY;
197 static inline bool bpf_map_support_seq_show(const struct bpf_map *map)
199 return (map->btf_value_type_id || map->btf_vmlinux_value_type_id) &&
200 map->ops->map_seq_show_elem;
203 int map_check_no_btf(const struct bpf_map *map,
204 const struct btf *btf,
205 const struct btf_type *key_type,
206 const struct btf_type *value_type);
208 extern const struct bpf_map_ops bpf_map_offload_ops;
210 /* function argument constraints */
212 ARG_DONTCARE = 0, /* unused argument in helper function */
214 /* the following constraints used to prototype
215 * bpf_map_lookup/update/delete_elem() functions
217 ARG_CONST_MAP_PTR, /* const argument used as pointer to bpf_map */
218 ARG_PTR_TO_MAP_KEY, /* pointer to stack used as map key */
219 ARG_PTR_TO_MAP_VALUE, /* pointer to stack used as map value */
220 ARG_PTR_TO_UNINIT_MAP_VALUE, /* pointer to valid memory used to store a map value */
221 ARG_PTR_TO_MAP_VALUE_OR_NULL, /* pointer to stack used as map value or NULL */
223 /* the following constraints used to prototype bpf_memcmp() and other
224 * functions that access data on eBPF program stack
226 ARG_PTR_TO_MEM, /* pointer to valid memory (stack, packet, map value) */
227 ARG_PTR_TO_MEM_OR_NULL, /* pointer to valid memory or NULL */
228 ARG_PTR_TO_UNINIT_MEM, /* pointer to memory does not need to be initialized,
229 * helper function must fill all bytes or clear
230 * them in error case.
233 ARG_CONST_SIZE, /* number of bytes accessed from memory */
234 ARG_CONST_SIZE_OR_ZERO, /* number of bytes accessed from memory or 0 */
236 ARG_PTR_TO_CTX, /* pointer to context */
237 ARG_PTR_TO_CTX_OR_NULL, /* pointer to context or NULL */
238 ARG_ANYTHING, /* any (initialized) argument is ok */
239 ARG_PTR_TO_SPIN_LOCK, /* pointer to bpf_spin_lock */
240 ARG_PTR_TO_SOCK_COMMON, /* pointer to sock_common */
241 ARG_PTR_TO_INT, /* pointer to int */
242 ARG_PTR_TO_LONG, /* pointer to long */
243 ARG_PTR_TO_SOCKET, /* pointer to bpf_sock (fullsock) */
244 ARG_PTR_TO_BTF_ID, /* pointer to in-kernel struct */
247 /* type of values returned from helper functions */
248 enum bpf_return_type {
249 RET_INTEGER, /* function returns integer */
250 RET_VOID, /* function doesn't return anything */
251 RET_PTR_TO_MAP_VALUE, /* returns a pointer to map elem value */
252 RET_PTR_TO_MAP_VALUE_OR_NULL, /* returns a pointer to map elem value or NULL */
253 RET_PTR_TO_SOCKET_OR_NULL, /* returns a pointer to a socket or NULL */
254 RET_PTR_TO_TCP_SOCK_OR_NULL, /* returns a pointer to a tcp_sock or NULL */
255 RET_PTR_TO_SOCK_COMMON_OR_NULL, /* returns a pointer to a sock_common or NULL */
258 /* eBPF function prototype used by verifier to allow BPF_CALLs from eBPF programs
259 * to in-kernel helper functions and for adjusting imm32 field in BPF_CALL
260 * instructions after verifying
262 struct bpf_func_proto {
263 u64 (*func)(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
266 enum bpf_return_type ret_type;
269 enum bpf_arg_type arg1_type;
270 enum bpf_arg_type arg2_type;
271 enum bpf_arg_type arg3_type;
272 enum bpf_arg_type arg4_type;
273 enum bpf_arg_type arg5_type;
275 enum bpf_arg_type arg_type[5];
277 int *btf_id; /* BTF ids of arguments */
280 /* bpf_context is intentionally undefined structure. Pointer to bpf_context is
281 * the first argument to eBPF programs.
282 * For socket filters: 'struct bpf_context *' == 'struct sk_buff *'
286 enum bpf_access_type {
291 /* types of values stored in eBPF registers */
292 /* Pointer types represent:
295 * pointer + (u16) var
296 * pointer + (u16) var + imm
297 * if (range > 0) then [ptr, ptr + range - off) is safe to access
298 * if (id > 0) means that some 'var' was added
299 * if (off > 0) means that 'imm' was added
302 NOT_INIT = 0, /* nothing was written into register */
303 SCALAR_VALUE, /* reg doesn't contain a valid pointer */
304 PTR_TO_CTX, /* reg points to bpf_context */
305 CONST_PTR_TO_MAP, /* reg points to struct bpf_map */
306 PTR_TO_MAP_VALUE, /* reg points to map element value */
307 PTR_TO_MAP_VALUE_OR_NULL,/* points to map elem value or NULL */
308 PTR_TO_STACK, /* reg == frame_pointer + offset */
309 PTR_TO_PACKET_META, /* skb->data - meta_len */
310 PTR_TO_PACKET, /* reg points to skb->data */
311 PTR_TO_PACKET_END, /* skb->data + headlen */
312 PTR_TO_FLOW_KEYS, /* reg points to bpf_flow_keys */
313 PTR_TO_SOCKET, /* reg points to struct bpf_sock */
314 PTR_TO_SOCKET_OR_NULL, /* reg points to struct bpf_sock or NULL */
315 PTR_TO_SOCK_COMMON, /* reg points to sock_common */
316 PTR_TO_SOCK_COMMON_OR_NULL, /* reg points to sock_common or NULL */
317 PTR_TO_TCP_SOCK, /* reg points to struct tcp_sock */
318 PTR_TO_TCP_SOCK_OR_NULL, /* reg points to struct tcp_sock or NULL */
319 PTR_TO_TP_BUFFER, /* reg points to a writable raw tp's buffer */
320 PTR_TO_XDP_SOCK, /* reg points to struct xdp_sock */
321 PTR_TO_BTF_ID, /* reg points to kernel struct */
324 /* The information passed from prog-specific *_is_valid_access
325 * back to the verifier.
327 struct bpf_insn_access_aux {
328 enum bpf_reg_type reg_type;
333 struct bpf_verifier_log *log; /* for verbose logs */
337 bpf_ctx_record_field_size(struct bpf_insn_access_aux *aux, u32 size)
339 aux->ctx_field_size = size;
342 struct bpf_prog_ops {
343 int (*test_run)(struct bpf_prog *prog, const union bpf_attr *kattr,
344 union bpf_attr __user *uattr);
347 struct bpf_verifier_ops {
348 /* return eBPF function prototype for verification */
349 const struct bpf_func_proto *
350 (*get_func_proto)(enum bpf_func_id func_id,
351 const struct bpf_prog *prog);
353 /* return true if 'size' wide access at offset 'off' within bpf_context
354 * with 'type' (read or write) is allowed
356 bool (*is_valid_access)(int off, int size, enum bpf_access_type type,
357 const struct bpf_prog *prog,
358 struct bpf_insn_access_aux *info);
359 int (*gen_prologue)(struct bpf_insn *insn, bool direct_write,
360 const struct bpf_prog *prog);
361 int (*gen_ld_abs)(const struct bpf_insn *orig,
362 struct bpf_insn *insn_buf);
363 u32 (*convert_ctx_access)(enum bpf_access_type type,
364 const struct bpf_insn *src,
365 struct bpf_insn *dst,
366 struct bpf_prog *prog, u32 *target_size);
367 int (*btf_struct_access)(struct bpf_verifier_log *log,
368 const struct btf_type *t, int off, int size,
369 enum bpf_access_type atype,
373 struct bpf_prog_offload_ops {
374 /* verifier basic callbacks */
375 int (*insn_hook)(struct bpf_verifier_env *env,
376 int insn_idx, int prev_insn_idx);
377 int (*finalize)(struct bpf_verifier_env *env);
378 /* verifier optimization callbacks (called after .finalize) */
379 int (*replace_insn)(struct bpf_verifier_env *env, u32 off,
380 struct bpf_insn *insn);
381 int (*remove_insns)(struct bpf_verifier_env *env, u32 off, u32 cnt);
382 /* program management callbacks */
383 int (*prepare)(struct bpf_prog *prog);
384 int (*translate)(struct bpf_prog *prog);
385 void (*destroy)(struct bpf_prog *prog);
388 struct bpf_prog_offload {
389 struct bpf_prog *prog;
390 struct net_device *netdev;
391 struct bpf_offload_dev *offdev;
393 struct list_head offloads;
400 enum bpf_cgroup_storage_type {
401 BPF_CGROUP_STORAGE_SHARED,
402 BPF_CGROUP_STORAGE_PERCPU,
403 __BPF_CGROUP_STORAGE_MAX
406 #define MAX_BPF_CGROUP_STORAGE_TYPE __BPF_CGROUP_STORAGE_MAX
408 /* The longest tracepoint has 12 args.
409 * See include/trace/bpf_probe.h
411 #define MAX_BPF_FUNC_ARGS 12
413 struct bpf_prog_stats {
416 struct u64_stats_sync syncp;
417 } __aligned(2 * sizeof(u64));
419 struct btf_func_model {
422 u8 arg_size[MAX_BPF_FUNC_ARGS];
425 /* Restore arguments before returning from trampoline to let original function
426 * continue executing. This flag is used for fentry progs when there are no
429 #define BPF_TRAMP_F_RESTORE_REGS BIT(0)
430 /* Call original function after fentry progs, but before fexit progs.
431 * Makes sense for fentry/fexit, normal calls and indirect calls.
433 #define BPF_TRAMP_F_CALL_ORIG BIT(1)
434 /* Skip current frame and return to parent. Makes sense for fentry/fexit
435 * programs only. Should not be used with normal calls and indirect calls.
437 #define BPF_TRAMP_F_SKIP_FRAME BIT(2)
439 /* Each call __bpf_prog_enter + call bpf_func + call __bpf_prog_exit is ~50
440 * bytes on x86. Pick a number to fit into BPF_IMAGE_SIZE / 2
442 #define BPF_MAX_TRAMP_PROGS 40
444 struct bpf_tramp_progs {
445 struct bpf_prog *progs[BPF_MAX_TRAMP_PROGS];
449 /* Different use cases for BPF trampoline:
450 * 1. replace nop at the function entry (kprobe equivalent)
451 * flags = BPF_TRAMP_F_RESTORE_REGS
452 * fentry = a set of programs to run before returning from trampoline
454 * 2. replace nop at the function entry (kprobe + kretprobe equivalent)
455 * flags = BPF_TRAMP_F_CALL_ORIG | BPF_TRAMP_F_SKIP_FRAME
456 * orig_call = fentry_ip + MCOUNT_INSN_SIZE
457 * fentry = a set of program to run before calling original function
458 * fexit = a set of program to run after original function
460 * 3. replace direct call instruction anywhere in the function body
461 * or assign a function pointer for indirect call (like tcp_congestion_ops->cong_avoid)
463 * fentry = a set of programs to run before returning from trampoline
464 * With flags = BPF_TRAMP_F_CALL_ORIG
465 * orig_call = original callback addr or direct function addr
466 * fentry = a set of program to run before calling original function
467 * fexit = a set of program to run after original function
469 int arch_prepare_bpf_trampoline(void *image, void *image_end,
470 const struct btf_func_model *m, u32 flags,
471 struct bpf_tramp_progs *tprogs,
473 /* these two functions are called from generated trampoline */
474 u64 notrace __bpf_prog_enter(void);
475 void notrace __bpf_prog_exit(struct bpf_prog *prog, u64 start);
480 char name[KSYM_NAME_LEN];
481 struct list_head lnode;
482 struct latch_tree_node tnode;
486 enum bpf_tramp_prog_type {
489 BPF_TRAMP_MODIFY_RETURN,
491 BPF_TRAMP_REPLACE, /* more than MAX */
494 struct bpf_trampoline {
495 /* hlist for trampoline_table */
496 struct hlist_node hlist;
497 /* serializes access to fields of this trampoline */
502 struct btf_func_model model;
506 /* if !NULL this is BPF_PROG_TYPE_EXT program that extends another BPF
507 * program by replacing one of its functions. func.addr is the address
508 * of the function it replaced.
510 struct bpf_prog *extension_prog;
511 /* list of BPF programs using this trampoline */
512 struct hlist_head progs_hlist[BPF_TRAMP_MAX];
513 /* Number of attached programs. A counter per kind. */
514 int progs_cnt[BPF_TRAMP_MAX];
515 /* Executable image of trampoline */
518 struct bpf_ksym ksym;
521 #define BPF_DISPATCHER_MAX 48 /* Fits in 2048B */
523 struct bpf_dispatcher_prog {
524 struct bpf_prog *prog;
528 struct bpf_dispatcher {
529 /* dispatcher mutex */
532 struct bpf_dispatcher_prog progs[BPF_DISPATCHER_MAX];
536 struct bpf_ksym ksym;
539 static __always_inline unsigned int bpf_dispatcher_nop_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 #ifdef CONFIG_BPF_JIT
548 struct bpf_trampoline *bpf_trampoline_lookup(u64 key);
549 int bpf_trampoline_link_prog(struct bpf_prog *prog);
550 int bpf_trampoline_unlink_prog(struct bpf_prog *prog);
551 void bpf_trampoline_put(struct bpf_trampoline *tr);
552 #define BPF_DISPATCHER_INIT(_name) { \
553 .mutex = __MUTEX_INITIALIZER(_name.mutex), \
554 .func = &_name##_func, \
561 .lnode = LIST_HEAD_INIT(_name.ksym.lnode), \
565 #define DEFINE_BPF_DISPATCHER(name) \
566 noinline unsigned int bpf_dispatcher_##name##_func( \
568 const struct bpf_insn *insnsi, \
569 unsigned int (*bpf_func)(const void *, \
570 const struct bpf_insn *)) \
572 return bpf_func(ctx, insnsi); \
574 EXPORT_SYMBOL(bpf_dispatcher_##name##_func); \
575 struct bpf_dispatcher bpf_dispatcher_##name = \
576 BPF_DISPATCHER_INIT(bpf_dispatcher_##name);
577 #define DECLARE_BPF_DISPATCHER(name) \
578 unsigned int bpf_dispatcher_##name##_func( \
580 const struct bpf_insn *insnsi, \
581 unsigned int (*bpf_func)(const void *, \
582 const struct bpf_insn *)); \
583 extern struct bpf_dispatcher bpf_dispatcher_##name;
584 #define BPF_DISPATCHER_FUNC(name) bpf_dispatcher_##name##_func
585 #define BPF_DISPATCHER_PTR(name) (&bpf_dispatcher_##name)
586 void bpf_dispatcher_change_prog(struct bpf_dispatcher *d, struct bpf_prog *from,
587 struct bpf_prog *to);
588 /* Called only from JIT-enabled code, so there's no need for stubs. */
589 void *bpf_jit_alloc_exec_page(void);
590 void bpf_image_ksym_add(void *data, struct bpf_ksym *ksym);
591 void bpf_image_ksym_del(struct bpf_ksym *ksym);
592 void bpf_ksym_add(struct bpf_ksym *ksym);
593 void bpf_ksym_del(struct bpf_ksym *ksym);
595 static inline struct bpf_trampoline *bpf_trampoline_lookup(u64 key)
599 static inline int bpf_trampoline_link_prog(struct bpf_prog *prog)
603 static inline int bpf_trampoline_unlink_prog(struct bpf_prog *prog)
607 static inline void bpf_trampoline_put(struct bpf_trampoline *tr) {}
608 #define DEFINE_BPF_DISPATCHER(name)
609 #define DECLARE_BPF_DISPATCHER(name)
610 #define BPF_DISPATCHER_FUNC(name) bpf_dispatcher_nop_func
611 #define BPF_DISPATCHER_PTR(name) NULL
612 static inline void bpf_dispatcher_change_prog(struct bpf_dispatcher *d,
613 struct bpf_prog *from,
614 struct bpf_prog *to) {}
615 static inline bool is_bpf_image_address(unsigned long address)
621 struct bpf_func_info_aux {
626 enum bpf_jit_poke_reason {
627 BPF_POKE_REASON_TAIL_CALL,
630 /* Descriptor of pokes pointing /into/ the JITed image. */
631 struct bpf_jit_poke_descriptor {
644 struct bpf_prog_aux {
652 u32 func_cnt; /* used by non-func prog as the number of func progs */
653 u32 func_idx; /* 0 for non-func prog, the index in func array for func prog */
654 u32 attach_btf_id; /* in-kernel BTF type id to attach to */
655 struct bpf_prog *linked_prog;
656 bool verifier_zext; /* Zero extensions has been inserted by verifier. */
657 bool offload_requested;
658 bool attach_btf_trace; /* true if attaching to BTF-enabled raw tp */
659 bool func_proto_unreliable;
660 enum bpf_tramp_prog_type trampoline_prog_type;
661 struct bpf_trampoline *trampoline;
662 struct hlist_node tramp_hlist;
663 /* BTF_KIND_FUNC_PROTO for valid attach_btf_id */
664 const struct btf_type *attach_func_proto;
665 /* function name for valid attach_btf_id */
666 const char *attach_func_name;
667 struct bpf_prog **func;
668 void *jit_data; /* JIT specific data. arch dependent */
669 struct bpf_jit_poke_descriptor *poke_tab;
671 struct bpf_ksym ksym;
672 const struct bpf_prog_ops *ops;
673 struct bpf_map **used_maps;
674 struct bpf_prog *prog;
675 struct user_struct *user;
676 u64 load_time; /* ns since boottime */
677 struct bpf_map *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE];
678 char name[BPF_OBJ_NAME_LEN];
679 #ifdef CONFIG_SECURITY
682 struct bpf_prog_offload *offload;
684 struct bpf_func_info *func_info;
685 struct bpf_func_info_aux *func_info_aux;
686 /* bpf_line_info loaded from userspace. linfo->insn_off
687 * has the xlated insn offset.
688 * Both the main and sub prog share the same linfo.
689 * The subprog can access its first linfo by
690 * using the linfo_idx.
692 struct bpf_line_info *linfo;
693 /* jited_linfo is the jited addr of the linfo. It has a
694 * one to one mapping to linfo:
695 * jited_linfo[i] is the jited addr for the linfo[i]->insn_off.
696 * Both the main and sub prog share the same jited_linfo.
697 * The subprog can access its first jited_linfo by
698 * using the linfo_idx.
703 /* subprog can use linfo_idx to access its first linfo and
705 * main prog always has linfo_idx == 0
709 struct exception_table_entry *extable;
710 struct bpf_prog_stats __percpu *stats;
712 struct work_struct work;
717 struct bpf_array_aux {
718 /* 'Ownership' of prog array is claimed by the first program that
719 * is going to use this map or by the first program which FD is
720 * stored in the map to make sure that all callers and callees have
721 * the same prog type and JITed flag.
723 enum bpf_prog_type type;
725 /* Programs with direct jumps into programs part of this array. */
726 struct list_head poke_progs;
728 struct mutex poke_mutex;
729 struct work_struct work;
732 struct bpf_struct_ops_value;
736 #define BPF_STRUCT_OPS_MAX_NR_MEMBERS 64
737 struct bpf_struct_ops {
738 const struct bpf_verifier_ops *verifier_ops;
739 int (*init)(struct btf *btf);
740 int (*check_member)(const struct btf_type *t,
741 const struct btf_member *member);
742 int (*init_member)(const struct btf_type *t,
743 const struct btf_member *member,
744 void *kdata, const void *udata);
745 int (*reg)(void *kdata);
746 void (*unreg)(void *kdata);
747 const struct btf_type *type;
748 const struct btf_type *value_type;
750 struct btf_func_model func_models[BPF_STRUCT_OPS_MAX_NR_MEMBERS];
755 #if defined(CONFIG_BPF_JIT) && defined(CONFIG_BPF_SYSCALL)
756 #define BPF_MODULE_OWNER ((void *)((0xeB9FUL << 2) + POISON_POINTER_DELTA))
757 const struct bpf_struct_ops *bpf_struct_ops_find(u32 type_id);
758 void bpf_struct_ops_init(struct btf *btf, struct bpf_verifier_log *log);
759 bool bpf_struct_ops_get(const void *kdata);
760 void bpf_struct_ops_put(const void *kdata);
761 int bpf_struct_ops_map_sys_lookup_elem(struct bpf_map *map, void *key,
763 static inline bool bpf_try_module_get(const void *data, struct module *owner)
765 if (owner == BPF_MODULE_OWNER)
766 return bpf_struct_ops_get(data);
768 return try_module_get(owner);
770 static inline void bpf_module_put(const void *data, struct module *owner)
772 if (owner == BPF_MODULE_OWNER)
773 bpf_struct_ops_put(data);
778 static inline const struct bpf_struct_ops *bpf_struct_ops_find(u32 type_id)
782 static inline void bpf_struct_ops_init(struct btf *btf,
783 struct bpf_verifier_log *log)
786 static inline bool bpf_try_module_get(const void *data, struct module *owner)
788 return try_module_get(owner);
790 static inline void bpf_module_put(const void *data, struct module *owner)
794 static inline int bpf_struct_ops_map_sys_lookup_elem(struct bpf_map *map,
806 struct bpf_array_aux *aux;
808 char value[0] __aligned(8);
809 void *ptrs[0] __aligned(8);
810 void __percpu *pptrs[0] __aligned(8);
814 #define BPF_COMPLEXITY_LIMIT_INSNS 1000000 /* yes. 1M insns */
815 #define MAX_TAIL_CALL_CNT 32
817 #define BPF_F_ACCESS_MASK (BPF_F_RDONLY | \
818 BPF_F_RDONLY_PROG | \
822 #define BPF_MAP_CAN_READ BIT(0)
823 #define BPF_MAP_CAN_WRITE BIT(1)
825 static inline u32 bpf_map_flags_to_cap(struct bpf_map *map)
827 u32 access_flags = map->map_flags & (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG);
829 /* Combination of BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG is
832 if (access_flags & BPF_F_RDONLY_PROG)
833 return BPF_MAP_CAN_READ;
834 else if (access_flags & BPF_F_WRONLY_PROG)
835 return BPF_MAP_CAN_WRITE;
837 return BPF_MAP_CAN_READ | BPF_MAP_CAN_WRITE;
840 static inline bool bpf_map_flags_access_ok(u32 access_flags)
842 return (access_flags & (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG)) !=
843 (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG);
846 struct bpf_event_entry {
847 struct perf_event *event;
848 struct file *perf_file;
849 struct file *map_file;
853 bool bpf_prog_array_compatible(struct bpf_array *array, const struct bpf_prog *fp);
854 int bpf_prog_calc_tag(struct bpf_prog *fp);
855 const char *kernel_type_name(u32 btf_type_id);
857 const struct bpf_func_proto *bpf_get_trace_printk_proto(void);
859 typedef unsigned long (*bpf_ctx_copy_t)(void *dst, const void *src,
860 unsigned long off, unsigned long len);
861 typedef u32 (*bpf_convert_ctx_access_t)(enum bpf_access_type type,
862 const struct bpf_insn *src,
863 struct bpf_insn *dst,
864 struct bpf_prog *prog,
867 u64 bpf_event_output(struct bpf_map *map, u64 flags, void *meta, u64 meta_size,
868 void *ctx, u64 ctx_size, bpf_ctx_copy_t ctx_copy);
870 /* an array of programs to be executed under rcu_lock.
873 * ret = BPF_PROG_RUN_ARRAY(&bpf_prog_array, ctx, BPF_PROG_RUN);
875 * the structure returned by bpf_prog_array_alloc() should be populated
876 * with program pointers and the last pointer must be NULL.
877 * The user has to keep refcnt on the program and make sure the program
878 * is removed from the array before bpf_prog_put().
879 * The 'struct bpf_prog_array *' should only be replaced with xchg()
880 * since other cpus are walking the array of pointers in parallel.
882 struct bpf_prog_array_item {
883 struct bpf_prog *prog;
884 struct bpf_cgroup_storage *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE];
887 struct bpf_prog_array {
889 struct bpf_prog_array_item items[];
892 struct bpf_prog_array *bpf_prog_array_alloc(u32 prog_cnt, gfp_t flags);
893 void bpf_prog_array_free(struct bpf_prog_array *progs);
894 int bpf_prog_array_length(struct bpf_prog_array *progs);
895 bool bpf_prog_array_is_empty(struct bpf_prog_array *array);
896 int bpf_prog_array_copy_to_user(struct bpf_prog_array *progs,
897 __u32 __user *prog_ids, u32 cnt);
899 void bpf_prog_array_delete_safe(struct bpf_prog_array *progs,
900 struct bpf_prog *old_prog);
901 int bpf_prog_array_copy_info(struct bpf_prog_array *array,
902 u32 *prog_ids, u32 request_cnt,
904 int bpf_prog_array_copy(struct bpf_prog_array *old_array,
905 struct bpf_prog *exclude_prog,
906 struct bpf_prog *include_prog,
907 struct bpf_prog_array **new_array);
909 #define __BPF_PROG_RUN_ARRAY(array, ctx, func, check_non_null) \
911 struct bpf_prog_array_item *_item; \
912 struct bpf_prog *_prog; \
913 struct bpf_prog_array *_array; \
917 _array = rcu_dereference(array); \
918 if (unlikely(check_non_null && !_array))\
920 _item = &_array->items[0]; \
921 while ((_prog = READ_ONCE(_item->prog))) { \
922 bpf_cgroup_storage_set(_item->cgroup_storage); \
923 _ret &= func(_prog, ctx); \
932 /* To be used by __cgroup_bpf_run_filter_skb for EGRESS BPF progs
933 * so BPF programs can request cwr for TCP packets.
935 * Current cgroup skb programs can only return 0 or 1 (0 to drop the
936 * packet. This macro changes the behavior so the low order bit
937 * indicates whether the packet should be dropped (0) or not (1)
938 * and the next bit is a congestion notification bit. This could be
939 * used by TCP to call tcp_enter_cwr()
941 * Hence, new allowed return values of CGROUP EGRESS BPF programs are:
944 * 2: drop packet and cn
945 * 3: keep packet and cn
947 * This macro then converts it to one of the NET_XMIT or an error
948 * code that is then interpreted as drop packet (and no cn):
949 * 0: NET_XMIT_SUCCESS skb should be transmitted
950 * 1: NET_XMIT_DROP skb should be dropped and cn
951 * 2: NET_XMIT_CN skb should be transmitted and cn
952 * 3: -EPERM skb should be dropped
954 #define BPF_PROG_CGROUP_INET_EGRESS_RUN_ARRAY(array, ctx, func) \
956 struct bpf_prog_array_item *_item; \
957 struct bpf_prog *_prog; \
958 struct bpf_prog_array *_array; \
964 _array = rcu_dereference(array); \
965 _item = &_array->items[0]; \
966 while ((_prog = READ_ONCE(_item->prog))) { \
967 bpf_cgroup_storage_set(_item->cgroup_storage); \
968 ret = func(_prog, ctx); \
976 _ret = (_cn ? NET_XMIT_CN : NET_XMIT_SUCCESS); \
978 _ret = (_cn ? NET_XMIT_DROP : -EPERM); \
982 #define BPF_PROG_RUN_ARRAY(array, ctx, func) \
983 __BPF_PROG_RUN_ARRAY(array, ctx, func, false)
985 #define BPF_PROG_RUN_ARRAY_CHECK(array, ctx, func) \
986 __BPF_PROG_RUN_ARRAY(array, ctx, func, true)
988 #ifdef CONFIG_BPF_SYSCALL
989 DECLARE_PER_CPU(int, bpf_prog_active);
992 * Block execution of BPF programs attached to instrumentation (perf,
993 * kprobes, tracepoints) to prevent deadlocks on map operations as any of
994 * these events can happen inside a region which holds a map bucket lock
995 * and can deadlock on it.
997 * Use the preemption safe inc/dec variants on RT because migrate disable
998 * is preemptible on RT and preemption in the middle of the RMW operation
999 * might lead to inconsistent state. Use the raw variants for non RT
1000 * kernels as migrate_disable() maps to preempt_disable() so the slightly
1001 * more expensive save operation can be avoided.
1003 static inline void bpf_disable_instrumentation(void)
1006 if (IS_ENABLED(CONFIG_PREEMPT_RT))
1007 this_cpu_inc(bpf_prog_active);
1009 __this_cpu_inc(bpf_prog_active);
1012 static inline void bpf_enable_instrumentation(void)
1014 if (IS_ENABLED(CONFIG_PREEMPT_RT))
1015 this_cpu_dec(bpf_prog_active);
1017 __this_cpu_dec(bpf_prog_active);
1021 extern const struct file_operations bpf_map_fops;
1022 extern const struct file_operations bpf_prog_fops;
1024 #define BPF_PROG_TYPE(_id, _name, prog_ctx_type, kern_ctx_type) \
1025 extern const struct bpf_prog_ops _name ## _prog_ops; \
1026 extern const struct bpf_verifier_ops _name ## _verifier_ops;
1027 #define BPF_MAP_TYPE(_id, _ops) \
1028 extern const struct bpf_map_ops _ops;
1029 #include <linux/bpf_types.h>
1030 #undef BPF_PROG_TYPE
1033 extern const struct bpf_prog_ops bpf_offload_prog_ops;
1034 extern const struct bpf_verifier_ops tc_cls_act_analyzer_ops;
1035 extern const struct bpf_verifier_ops xdp_analyzer_ops;
1037 struct bpf_prog *bpf_prog_get(u32 ufd);
1038 struct bpf_prog *bpf_prog_get_type_dev(u32 ufd, enum bpf_prog_type type,
1040 void bpf_prog_add(struct bpf_prog *prog, int i);
1041 void bpf_prog_sub(struct bpf_prog *prog, int i);
1042 void bpf_prog_inc(struct bpf_prog *prog);
1043 struct bpf_prog * __must_check bpf_prog_inc_not_zero(struct bpf_prog *prog);
1044 void bpf_prog_put(struct bpf_prog *prog);
1045 int __bpf_prog_charge(struct user_struct *user, u32 pages);
1046 void __bpf_prog_uncharge(struct user_struct *user, u32 pages);
1047 void __bpf_free_used_maps(struct bpf_prog_aux *aux,
1048 struct bpf_map **used_maps, u32 len);
1050 void bpf_prog_free_id(struct bpf_prog *prog, bool do_idr_lock);
1051 void bpf_map_free_id(struct bpf_map *map, bool do_idr_lock);
1053 struct bpf_map *bpf_map_get(u32 ufd);
1054 struct bpf_map *bpf_map_get_with_uref(u32 ufd);
1055 struct bpf_map *__bpf_map_get(struct fd f);
1056 void bpf_map_inc(struct bpf_map *map);
1057 void bpf_map_inc_with_uref(struct bpf_map *map);
1058 struct bpf_map * __must_check bpf_map_inc_not_zero(struct bpf_map *map);
1059 void bpf_map_put_with_uref(struct bpf_map *map);
1060 void bpf_map_put(struct bpf_map *map);
1061 int bpf_map_charge_memlock(struct bpf_map *map, u32 pages);
1062 void bpf_map_uncharge_memlock(struct bpf_map *map, u32 pages);
1063 int bpf_map_charge_init(struct bpf_map_memory *mem, u64 size);
1064 void bpf_map_charge_finish(struct bpf_map_memory *mem);
1065 void bpf_map_charge_move(struct bpf_map_memory *dst,
1066 struct bpf_map_memory *src);
1067 void *bpf_map_area_alloc(u64 size, int numa_node);
1068 void *bpf_map_area_mmapable_alloc(u64 size, int numa_node);
1069 void bpf_map_area_free(void *base);
1070 void bpf_map_init_from_attr(struct bpf_map *map, union bpf_attr *attr);
1071 int generic_map_lookup_batch(struct bpf_map *map,
1072 const union bpf_attr *attr,
1073 union bpf_attr __user *uattr);
1074 int generic_map_update_batch(struct bpf_map *map,
1075 const union bpf_attr *attr,
1076 union bpf_attr __user *uattr);
1077 int generic_map_delete_batch(struct bpf_map *map,
1078 const union bpf_attr *attr,
1079 union bpf_attr __user *uattr);
1081 extern int sysctl_unprivileged_bpf_disabled;
1083 int bpf_map_new_fd(struct bpf_map *map, int flags);
1084 int bpf_prog_new_fd(struct bpf_prog *prog);
1088 const struct bpf_link_ops *ops;
1089 struct bpf_prog *prog;
1090 struct work_struct work;
1093 struct bpf_link_ops {
1094 void (*release)(struct bpf_link *link);
1095 void (*dealloc)(struct bpf_link *link);
1099 void bpf_link_init(struct bpf_link *link, const struct bpf_link_ops *ops,
1100 struct bpf_prog *prog);
1101 void bpf_link_cleanup(struct bpf_link *link, struct file *link_file,
1103 void bpf_link_inc(struct bpf_link *link);
1104 void bpf_link_put(struct bpf_link *link);
1105 int bpf_link_new_fd(struct bpf_link *link);
1106 struct file *bpf_link_new_file(struct bpf_link *link, int *reserved_fd);
1107 struct bpf_link *bpf_link_get_from_fd(u32 ufd);
1109 int bpf_obj_pin_user(u32 ufd, const char __user *pathname);
1110 int bpf_obj_get_user(const char __user *pathname, int flags);
1112 int bpf_percpu_hash_copy(struct bpf_map *map, void *key, void *value);
1113 int bpf_percpu_array_copy(struct bpf_map *map, void *key, void *value);
1114 int bpf_percpu_hash_update(struct bpf_map *map, void *key, void *value,
1116 int bpf_percpu_array_update(struct bpf_map *map, void *key, void *value,
1119 int bpf_stackmap_copy(struct bpf_map *map, void *key, void *value);
1121 int bpf_fd_array_map_update_elem(struct bpf_map *map, struct file *map_file,
1122 void *key, void *value, u64 map_flags);
1123 int bpf_fd_array_map_lookup_elem(struct bpf_map *map, void *key, u32 *value);
1124 int bpf_fd_htab_map_update_elem(struct bpf_map *map, struct file *map_file,
1125 void *key, void *value, u64 map_flags);
1126 int bpf_fd_htab_map_lookup_elem(struct bpf_map *map, void *key, u32 *value);
1128 int bpf_get_file_flag(int flags);
1129 int bpf_check_uarg_tail_zero(void __user *uaddr, size_t expected_size,
1130 size_t actual_size);
1132 /* memcpy that is used with 8-byte aligned pointers, power-of-8 size and
1133 * forced to use 'long' read/writes to try to atomically copy long counters.
1134 * Best-effort only. No barriers here, since it _will_ race with concurrent
1135 * updates from BPF programs. Called from bpf syscall and mostly used with
1136 * size 8 or 16 bytes, so ask compiler to inline it.
1138 static inline void bpf_long_memcpy(void *dst, const void *src, u32 size)
1140 const long *lsrc = src;
1143 size /= sizeof(long);
1148 /* verify correctness of eBPF program */
1149 int bpf_check(struct bpf_prog **fp, union bpf_attr *attr,
1150 union bpf_attr __user *uattr);
1151 void bpf_patch_call_args(struct bpf_insn *insn, u32 stack_depth);
1157 struct bpf_dtab_netdev *__dev_map_lookup_elem(struct bpf_map *map, u32 key);
1158 struct bpf_dtab_netdev *__dev_map_hash_lookup_elem(struct bpf_map *map, u32 key);
1159 void __dev_flush(void);
1160 int dev_xdp_enqueue(struct net_device *dev, struct xdp_buff *xdp,
1161 struct net_device *dev_rx);
1162 int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp,
1163 struct net_device *dev_rx);
1164 int dev_map_generic_redirect(struct bpf_dtab_netdev *dst, struct sk_buff *skb,
1165 struct bpf_prog *xdp_prog);
1167 struct bpf_cpu_map_entry *__cpu_map_lookup_elem(struct bpf_map *map, u32 key);
1168 void __cpu_map_flush(void);
1169 int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu, struct xdp_buff *xdp,
1170 struct net_device *dev_rx);
1172 /* Return map's numa specified by userspace */
1173 static inline int bpf_map_attr_numa_node(const union bpf_attr *attr)
1175 return (attr->map_flags & BPF_F_NUMA_NODE) ?
1176 attr->numa_node : NUMA_NO_NODE;
1179 struct bpf_prog *bpf_prog_get_type_path(const char *name, enum bpf_prog_type type);
1180 int array_map_alloc_check(union bpf_attr *attr);
1182 int bpf_prog_test_run_xdp(struct bpf_prog *prog, const union bpf_attr *kattr,
1183 union bpf_attr __user *uattr);
1184 int bpf_prog_test_run_skb(struct bpf_prog *prog, const union bpf_attr *kattr,
1185 union bpf_attr __user *uattr);
1186 int bpf_prog_test_run_tracing(struct bpf_prog *prog,
1187 const union bpf_attr *kattr,
1188 union bpf_attr __user *uattr);
1189 int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog,
1190 const union bpf_attr *kattr,
1191 union bpf_attr __user *uattr);
1192 bool btf_ctx_access(int off, int size, enum bpf_access_type type,
1193 const struct bpf_prog *prog,
1194 struct bpf_insn_access_aux *info);
1195 int btf_struct_access(struct bpf_verifier_log *log,
1196 const struct btf_type *t, int off, int size,
1197 enum bpf_access_type atype,
1199 int btf_resolve_helper_id(struct bpf_verifier_log *log,
1200 const struct bpf_func_proto *fn, int);
1202 int btf_distill_func_proto(struct bpf_verifier_log *log,
1204 const struct btf_type *func_proto,
1205 const char *func_name,
1206 struct btf_func_model *m);
1208 struct bpf_reg_state;
1209 int btf_check_func_arg_match(struct bpf_verifier_env *env, int subprog,
1210 struct bpf_reg_state *regs);
1211 int btf_prepare_func_args(struct bpf_verifier_env *env, int subprog,
1212 struct bpf_reg_state *reg);
1213 int btf_check_type_match(struct bpf_verifier_env *env, struct bpf_prog *prog,
1214 struct btf *btf, const struct btf_type *t);
1216 struct bpf_prog *bpf_prog_by_id(u32 id);
1218 #else /* !CONFIG_BPF_SYSCALL */
1219 static inline struct bpf_prog *bpf_prog_get(u32 ufd)
1221 return ERR_PTR(-EOPNOTSUPP);
1224 static inline struct bpf_prog *bpf_prog_get_type_dev(u32 ufd,
1225 enum bpf_prog_type type,
1228 return ERR_PTR(-EOPNOTSUPP);
1231 static inline void bpf_prog_add(struct bpf_prog *prog, int i)
1235 static inline void bpf_prog_sub(struct bpf_prog *prog, int i)
1239 static inline void bpf_prog_put(struct bpf_prog *prog)
1243 static inline void bpf_prog_inc(struct bpf_prog *prog)
1247 static inline struct bpf_prog *__must_check
1248 bpf_prog_inc_not_zero(struct bpf_prog *prog)
1250 return ERR_PTR(-EOPNOTSUPP);
1253 static inline int __bpf_prog_charge(struct user_struct *user, u32 pages)
1258 static inline void __bpf_prog_uncharge(struct user_struct *user, u32 pages)
1262 static inline int bpf_obj_get_user(const char __user *pathname, int flags)
1267 static inline struct net_device *__dev_map_lookup_elem(struct bpf_map *map,
1273 static inline struct net_device *__dev_map_hash_lookup_elem(struct bpf_map *map,
1279 static inline void __dev_flush(void)
1284 struct bpf_dtab_netdev;
1287 int dev_xdp_enqueue(struct net_device *dev, struct xdp_buff *xdp,
1288 struct net_device *dev_rx)
1294 int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp,
1295 struct net_device *dev_rx)
1302 static inline int dev_map_generic_redirect(struct bpf_dtab_netdev *dst,
1303 struct sk_buff *skb,
1304 struct bpf_prog *xdp_prog)
1310 struct bpf_cpu_map_entry *__cpu_map_lookup_elem(struct bpf_map *map, u32 key)
1315 static inline void __cpu_map_flush(void)
1319 static inline int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu,
1320 struct xdp_buff *xdp,
1321 struct net_device *dev_rx)
1326 static inline struct bpf_prog *bpf_prog_get_type_path(const char *name,
1327 enum bpf_prog_type type)
1329 return ERR_PTR(-EOPNOTSUPP);
1332 static inline int bpf_prog_test_run_xdp(struct bpf_prog *prog,
1333 const union bpf_attr *kattr,
1334 union bpf_attr __user *uattr)
1339 static inline int bpf_prog_test_run_skb(struct bpf_prog *prog,
1340 const union bpf_attr *kattr,
1341 union bpf_attr __user *uattr)
1346 static inline int bpf_prog_test_run_tracing(struct bpf_prog *prog,
1347 const union bpf_attr *kattr,
1348 union bpf_attr __user *uattr)
1353 static inline int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog,
1354 const union bpf_attr *kattr,
1355 union bpf_attr __user *uattr)
1360 static inline void bpf_map_put(struct bpf_map *map)
1364 static inline struct bpf_prog *bpf_prog_by_id(u32 id)
1366 return ERR_PTR(-ENOTSUPP);
1368 #endif /* CONFIG_BPF_SYSCALL */
1370 static inline struct bpf_prog *bpf_prog_get_type(u32 ufd,
1371 enum bpf_prog_type type)
1373 return bpf_prog_get_type_dev(ufd, type, false);
1376 bool bpf_prog_get_ok(struct bpf_prog *, enum bpf_prog_type *, bool);
1378 int bpf_prog_offload_compile(struct bpf_prog *prog);
1379 void bpf_prog_offload_destroy(struct bpf_prog *prog);
1380 int bpf_prog_offload_info_fill(struct bpf_prog_info *info,
1381 struct bpf_prog *prog);
1383 int bpf_map_offload_info_fill(struct bpf_map_info *info, struct bpf_map *map);
1385 int bpf_map_offload_lookup_elem(struct bpf_map *map, void *key, void *value);
1386 int bpf_map_offload_update_elem(struct bpf_map *map,
1387 void *key, void *value, u64 flags);
1388 int bpf_map_offload_delete_elem(struct bpf_map *map, void *key);
1389 int bpf_map_offload_get_next_key(struct bpf_map *map,
1390 void *key, void *next_key);
1392 bool bpf_offload_prog_map_match(struct bpf_prog *prog, struct bpf_map *map);
1394 struct bpf_offload_dev *
1395 bpf_offload_dev_create(const struct bpf_prog_offload_ops *ops, void *priv);
1396 void bpf_offload_dev_destroy(struct bpf_offload_dev *offdev);
1397 void *bpf_offload_dev_priv(struct bpf_offload_dev *offdev);
1398 int bpf_offload_dev_netdev_register(struct bpf_offload_dev *offdev,
1399 struct net_device *netdev);
1400 void bpf_offload_dev_netdev_unregister(struct bpf_offload_dev *offdev,
1401 struct net_device *netdev);
1402 bool bpf_offload_dev_match(struct bpf_prog *prog, struct net_device *netdev);
1404 #if defined(CONFIG_NET) && defined(CONFIG_BPF_SYSCALL)
1405 int bpf_prog_offload_init(struct bpf_prog *prog, union bpf_attr *attr);
1407 static inline bool bpf_prog_is_dev_bound(const struct bpf_prog_aux *aux)
1409 return aux->offload_requested;
1412 static inline bool bpf_map_is_dev_bound(struct bpf_map *map)
1414 return unlikely(map->ops == &bpf_map_offload_ops);
1417 struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr);
1418 void bpf_map_offload_map_free(struct bpf_map *map);
1420 static inline int bpf_prog_offload_init(struct bpf_prog *prog,
1421 union bpf_attr *attr)
1426 static inline bool bpf_prog_is_dev_bound(struct bpf_prog_aux *aux)
1431 static inline bool bpf_map_is_dev_bound(struct bpf_map *map)
1436 static inline struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr)
1438 return ERR_PTR(-EOPNOTSUPP);
1441 static inline void bpf_map_offload_map_free(struct bpf_map *map)
1444 #endif /* CONFIG_NET && CONFIG_BPF_SYSCALL */
1446 #if defined(CONFIG_BPF_STREAM_PARSER)
1447 int sock_map_prog_update(struct bpf_map *map, struct bpf_prog *prog, u32 which);
1448 int sock_map_get_from_fd(const union bpf_attr *attr, struct bpf_prog *prog);
1449 void sock_map_unhash(struct sock *sk);
1450 void sock_map_close(struct sock *sk, long timeout);
1452 static inline int sock_map_prog_update(struct bpf_map *map,
1453 struct bpf_prog *prog, u32 which)
1458 static inline int sock_map_get_from_fd(const union bpf_attr *attr,
1459 struct bpf_prog *prog)
1463 #endif /* CONFIG_BPF_STREAM_PARSER */
1465 #if defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL)
1466 void bpf_sk_reuseport_detach(struct sock *sk);
1467 int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map, void *key,
1469 int bpf_fd_reuseport_array_update_elem(struct bpf_map *map, void *key,
1470 void *value, u64 map_flags);
1472 static inline void bpf_sk_reuseport_detach(struct sock *sk)
1476 #ifdef CONFIG_BPF_SYSCALL
1477 static inline int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map,
1478 void *key, void *value)
1483 static inline int bpf_fd_reuseport_array_update_elem(struct bpf_map *map,
1484 void *key, void *value,
1489 #endif /* CONFIG_BPF_SYSCALL */
1490 #endif /* defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL) */
1492 /* verifier prototypes for helper functions called from eBPF programs */
1493 extern const struct bpf_func_proto bpf_map_lookup_elem_proto;
1494 extern const struct bpf_func_proto bpf_map_update_elem_proto;
1495 extern const struct bpf_func_proto bpf_map_delete_elem_proto;
1496 extern const struct bpf_func_proto bpf_map_push_elem_proto;
1497 extern const struct bpf_func_proto bpf_map_pop_elem_proto;
1498 extern const struct bpf_func_proto bpf_map_peek_elem_proto;
1500 extern const struct bpf_func_proto bpf_get_prandom_u32_proto;
1501 extern const struct bpf_func_proto bpf_get_smp_processor_id_proto;
1502 extern const struct bpf_func_proto bpf_get_numa_node_id_proto;
1503 extern const struct bpf_func_proto bpf_tail_call_proto;
1504 extern const struct bpf_func_proto bpf_ktime_get_ns_proto;
1505 extern const struct bpf_func_proto bpf_get_current_pid_tgid_proto;
1506 extern const struct bpf_func_proto bpf_get_current_uid_gid_proto;
1507 extern const struct bpf_func_proto bpf_get_current_comm_proto;
1508 extern const struct bpf_func_proto bpf_get_stackid_proto;
1509 extern const struct bpf_func_proto bpf_get_stack_proto;
1510 extern const struct bpf_func_proto bpf_sock_map_update_proto;
1511 extern const struct bpf_func_proto bpf_sock_hash_update_proto;
1512 extern const struct bpf_func_proto bpf_get_current_cgroup_id_proto;
1513 extern const struct bpf_func_proto bpf_get_current_ancestor_cgroup_id_proto;
1514 extern const struct bpf_func_proto bpf_msg_redirect_hash_proto;
1515 extern const struct bpf_func_proto bpf_msg_redirect_map_proto;
1516 extern const struct bpf_func_proto bpf_sk_redirect_hash_proto;
1517 extern const struct bpf_func_proto bpf_sk_redirect_map_proto;
1518 extern const struct bpf_func_proto bpf_spin_lock_proto;
1519 extern const struct bpf_func_proto bpf_spin_unlock_proto;
1520 extern const struct bpf_func_proto bpf_get_local_storage_proto;
1521 extern const struct bpf_func_proto bpf_strtol_proto;
1522 extern const struct bpf_func_proto bpf_strtoul_proto;
1523 extern const struct bpf_func_proto bpf_tcp_sock_proto;
1524 extern const struct bpf_func_proto bpf_jiffies64_proto;
1525 extern const struct bpf_func_proto bpf_get_ns_current_pid_tgid_proto;
1527 const struct bpf_func_proto *bpf_tracing_func_proto(
1528 enum bpf_func_id func_id, const struct bpf_prog *prog);
1530 /* Shared helpers among cBPF and eBPF. */
1531 void bpf_user_rnd_init_once(void);
1532 u64 bpf_user_rnd_u32(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
1534 #if defined(CONFIG_NET)
1535 bool bpf_sock_common_is_valid_access(int off, int size,
1536 enum bpf_access_type type,
1537 struct bpf_insn_access_aux *info);
1538 bool bpf_sock_is_valid_access(int off, int size, enum bpf_access_type type,
1539 struct bpf_insn_access_aux *info);
1540 u32 bpf_sock_convert_ctx_access(enum bpf_access_type type,
1541 const struct bpf_insn *si,
1542 struct bpf_insn *insn_buf,
1543 struct bpf_prog *prog,
1546 static inline bool bpf_sock_common_is_valid_access(int off, int size,
1547 enum bpf_access_type type,
1548 struct bpf_insn_access_aux *info)
1552 static inline bool bpf_sock_is_valid_access(int off, int size,
1553 enum bpf_access_type type,
1554 struct bpf_insn_access_aux *info)
1558 static inline u32 bpf_sock_convert_ctx_access(enum bpf_access_type type,
1559 const struct bpf_insn *si,
1560 struct bpf_insn *insn_buf,
1561 struct bpf_prog *prog,
1569 struct sk_reuseport_kern {
1570 struct sk_buff *skb;
1572 struct sock *selected_sk;
1578 bool bpf_tcp_sock_is_valid_access(int off, int size, enum bpf_access_type type,
1579 struct bpf_insn_access_aux *info);
1581 u32 bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type,
1582 const struct bpf_insn *si,
1583 struct bpf_insn *insn_buf,
1584 struct bpf_prog *prog,
1587 bool bpf_xdp_sock_is_valid_access(int off, int size, enum bpf_access_type type,
1588 struct bpf_insn_access_aux *info);
1590 u32 bpf_xdp_sock_convert_ctx_access(enum bpf_access_type type,
1591 const struct bpf_insn *si,
1592 struct bpf_insn *insn_buf,
1593 struct bpf_prog *prog,
1596 static inline bool bpf_tcp_sock_is_valid_access(int off, int size,
1597 enum bpf_access_type type,
1598 struct bpf_insn_access_aux *info)
1603 static inline u32 bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type,
1604 const struct bpf_insn *si,
1605 struct bpf_insn *insn_buf,
1606 struct bpf_prog *prog,
1611 static inline bool bpf_xdp_sock_is_valid_access(int off, int size,
1612 enum bpf_access_type type,
1613 struct bpf_insn_access_aux *info)
1618 static inline u32 bpf_xdp_sock_convert_ctx_access(enum bpf_access_type type,
1619 const struct bpf_insn *si,
1620 struct bpf_insn *insn_buf,
1621 struct bpf_prog *prog,
1626 #endif /* CONFIG_INET */
1628 enum bpf_text_poke_type {
1633 int bpf_arch_text_poke(void *ip, enum bpf_text_poke_type t,
1634 void *addr1, void *addr2);
1636 #endif /* _LINUX_BPF_H */