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,
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 /* Each call __bpf_prog_enter + call bpf_func + call __bpf_prog_exit is ~50
438 * bytes on x86. Pick a number to fit into BPF_IMAGE_SIZE / 2
440 #define BPF_MAX_TRAMP_PROGS 40
442 struct bpf_tramp_progs {
443 struct bpf_prog *progs[BPF_MAX_TRAMP_PROGS];
447 /* Different use cases for BPF trampoline:
448 * 1. replace nop at the function entry (kprobe equivalent)
449 * flags = BPF_TRAMP_F_RESTORE_REGS
450 * fentry = a set of programs to run before returning from trampoline
452 * 2. replace nop at the function entry (kprobe + kretprobe equivalent)
453 * flags = BPF_TRAMP_F_CALL_ORIG | BPF_TRAMP_F_SKIP_FRAME
454 * orig_call = fentry_ip + MCOUNT_INSN_SIZE
455 * fentry = a set of program to run before calling original function
456 * fexit = a set of program to run after original function
458 * 3. replace direct call instruction anywhere in the function body
459 * or assign a function pointer for indirect call (like tcp_congestion_ops->cong_avoid)
461 * fentry = a set of programs to run before returning from trampoline
462 * With flags = BPF_TRAMP_F_CALL_ORIG
463 * orig_call = original callback addr or direct function addr
464 * fentry = a set of program to run before calling original function
465 * fexit = a set of program to run after original function
467 int arch_prepare_bpf_trampoline(void *image, void *image_end,
468 const struct btf_func_model *m, u32 flags,
469 struct bpf_tramp_progs *tprogs,
471 /* these two functions are called from generated trampoline */
472 u64 notrace __bpf_prog_enter(void);
473 void notrace __bpf_prog_exit(struct bpf_prog *prog, u64 start);
478 char name[KSYM_NAME_LEN];
479 struct list_head lnode;
480 struct latch_tree_node tnode;
484 enum bpf_tramp_prog_type {
487 BPF_TRAMP_MODIFY_RETURN,
489 BPF_TRAMP_REPLACE, /* more than MAX */
492 struct bpf_trampoline {
493 /* hlist for trampoline_table */
494 struct hlist_node hlist;
495 /* serializes access to fields of this trampoline */
500 struct btf_func_model model;
504 /* if !NULL this is BPF_PROG_TYPE_EXT program that extends another BPF
505 * program by replacing one of its functions. func.addr is the address
506 * of the function it replaced.
508 struct bpf_prog *extension_prog;
509 /* list of BPF programs using this trampoline */
510 struct hlist_head progs_hlist[BPF_TRAMP_MAX];
511 /* Number of attached programs. A counter per kind. */
512 int progs_cnt[BPF_TRAMP_MAX];
513 /* Executable image of trampoline */
516 struct bpf_ksym ksym;
519 #define BPF_DISPATCHER_MAX 48 /* Fits in 2048B */
521 struct bpf_dispatcher_prog {
522 struct bpf_prog *prog;
526 struct bpf_dispatcher {
527 /* dispatcher mutex */
530 struct bpf_dispatcher_prog progs[BPF_DISPATCHER_MAX];
534 struct bpf_ksym ksym;
537 static __always_inline unsigned int bpf_dispatcher_nop_func(
539 const struct bpf_insn *insnsi,
540 unsigned int (*bpf_func)(const void *,
541 const struct bpf_insn *))
543 return bpf_func(ctx, insnsi);
545 #ifdef CONFIG_BPF_JIT
546 struct bpf_trampoline *bpf_trampoline_lookup(u64 key);
547 int bpf_trampoline_link_prog(struct bpf_prog *prog);
548 int bpf_trampoline_unlink_prog(struct bpf_prog *prog);
549 void bpf_trampoline_put(struct bpf_trampoline *tr);
550 #define BPF_DISPATCHER_INIT(_name) { \
551 .mutex = __MUTEX_INITIALIZER(_name.mutex), \
552 .func = &_name##_func, \
559 .lnode = LIST_HEAD_INIT(_name.ksym.lnode), \
563 #define DEFINE_BPF_DISPATCHER(name) \
564 noinline unsigned int bpf_dispatcher_##name##_func( \
566 const struct bpf_insn *insnsi, \
567 unsigned int (*bpf_func)(const void *, \
568 const struct bpf_insn *)) \
570 return bpf_func(ctx, insnsi); \
572 EXPORT_SYMBOL(bpf_dispatcher_##name##_func); \
573 struct bpf_dispatcher bpf_dispatcher_##name = \
574 BPF_DISPATCHER_INIT(bpf_dispatcher_##name);
575 #define DECLARE_BPF_DISPATCHER(name) \
576 unsigned int bpf_dispatcher_##name##_func( \
578 const struct bpf_insn *insnsi, \
579 unsigned int (*bpf_func)(const void *, \
580 const struct bpf_insn *)); \
581 extern struct bpf_dispatcher bpf_dispatcher_##name;
582 #define BPF_DISPATCHER_FUNC(name) bpf_dispatcher_##name##_func
583 #define BPF_DISPATCHER_PTR(name) (&bpf_dispatcher_##name)
584 void bpf_dispatcher_change_prog(struct bpf_dispatcher *d, struct bpf_prog *from,
585 struct bpf_prog *to);
586 /* Called only from JIT-enabled code, so there's no need for stubs. */
587 void *bpf_jit_alloc_exec_page(void);
588 void bpf_image_ksym_add(void *data, struct bpf_ksym *ksym);
589 void bpf_image_ksym_del(struct bpf_ksym *ksym);
590 void bpf_ksym_add(struct bpf_ksym *ksym);
591 void bpf_ksym_del(struct bpf_ksym *ksym);
593 static inline struct bpf_trampoline *bpf_trampoline_lookup(u64 key)
597 static inline int bpf_trampoline_link_prog(struct bpf_prog *prog)
601 static inline int bpf_trampoline_unlink_prog(struct bpf_prog *prog)
605 static inline void bpf_trampoline_put(struct bpf_trampoline *tr) {}
606 #define DEFINE_BPF_DISPATCHER(name)
607 #define DECLARE_BPF_DISPATCHER(name)
608 #define BPF_DISPATCHER_FUNC(name) bpf_dispatcher_nop_func
609 #define BPF_DISPATCHER_PTR(name) NULL
610 static inline void bpf_dispatcher_change_prog(struct bpf_dispatcher *d,
611 struct bpf_prog *from,
612 struct bpf_prog *to) {}
613 static inline bool is_bpf_image_address(unsigned long address)
619 struct bpf_func_info_aux {
624 enum bpf_jit_poke_reason {
625 BPF_POKE_REASON_TAIL_CALL,
628 /* Descriptor of pokes pointing /into/ the JITed image. */
629 struct bpf_jit_poke_descriptor {
642 struct bpf_prog_aux {
650 u32 func_cnt; /* used by non-func prog as the number of func progs */
651 u32 func_idx; /* 0 for non-func prog, the index in func array for func prog */
652 u32 attach_btf_id; /* in-kernel BTF type id to attach to */
653 struct bpf_prog *linked_prog;
654 bool verifier_zext; /* Zero extensions has been inserted by verifier. */
655 bool offload_requested;
656 bool attach_btf_trace; /* true if attaching to BTF-enabled raw tp */
657 bool func_proto_unreliable;
658 enum bpf_tramp_prog_type trampoline_prog_type;
659 struct bpf_trampoline *trampoline;
660 struct hlist_node tramp_hlist;
661 /* BTF_KIND_FUNC_PROTO for valid attach_btf_id */
662 const struct btf_type *attach_func_proto;
663 /* function name for valid attach_btf_id */
664 const char *attach_func_name;
665 struct bpf_prog **func;
666 void *jit_data; /* JIT specific data. arch dependent */
667 struct bpf_jit_poke_descriptor *poke_tab;
669 struct bpf_ksym ksym;
670 const struct bpf_prog_ops *ops;
671 struct bpf_map **used_maps;
672 struct bpf_prog *prog;
673 struct user_struct *user;
674 u64 load_time; /* ns since boottime */
675 struct bpf_map *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE];
676 char name[BPF_OBJ_NAME_LEN];
677 #ifdef CONFIG_SECURITY
680 struct bpf_prog_offload *offload;
682 struct bpf_func_info *func_info;
683 struct bpf_func_info_aux *func_info_aux;
684 /* bpf_line_info loaded from userspace. linfo->insn_off
685 * has the xlated insn offset.
686 * Both the main and sub prog share the same linfo.
687 * The subprog can access its first linfo by
688 * using the linfo_idx.
690 struct bpf_line_info *linfo;
691 /* jited_linfo is the jited addr of the linfo. It has a
692 * one to one mapping to linfo:
693 * jited_linfo[i] is the jited addr for the linfo[i]->insn_off.
694 * Both the main and sub prog share the same jited_linfo.
695 * The subprog can access its first jited_linfo by
696 * using the linfo_idx.
701 /* subprog can use linfo_idx to access its first linfo and
703 * main prog always has linfo_idx == 0
707 struct exception_table_entry *extable;
708 struct bpf_prog_stats __percpu *stats;
710 struct work_struct work;
715 struct bpf_array_aux {
716 /* 'Ownership' of prog array is claimed by the first program that
717 * is going to use this map or by the first program which FD is
718 * stored in the map to make sure that all callers and callees have
719 * the same prog type and JITed flag.
721 enum bpf_prog_type type;
723 /* Programs with direct jumps into programs part of this array. */
724 struct list_head poke_progs;
726 struct mutex poke_mutex;
727 struct work_struct work;
730 struct bpf_struct_ops_value;
734 #define BPF_STRUCT_OPS_MAX_NR_MEMBERS 64
735 struct bpf_struct_ops {
736 const struct bpf_verifier_ops *verifier_ops;
737 int (*init)(struct btf *btf);
738 int (*check_member)(const struct btf_type *t,
739 const struct btf_member *member);
740 int (*init_member)(const struct btf_type *t,
741 const struct btf_member *member,
742 void *kdata, const void *udata);
743 int (*reg)(void *kdata);
744 void (*unreg)(void *kdata);
745 const struct btf_type *type;
746 const struct btf_type *value_type;
748 struct btf_func_model func_models[BPF_STRUCT_OPS_MAX_NR_MEMBERS];
753 #if defined(CONFIG_BPF_JIT) && defined(CONFIG_BPF_SYSCALL)
754 #define BPF_MODULE_OWNER ((void *)((0xeB9FUL << 2) + POISON_POINTER_DELTA))
755 const struct bpf_struct_ops *bpf_struct_ops_find(u32 type_id);
756 void bpf_struct_ops_init(struct btf *btf, struct bpf_verifier_log *log);
757 bool bpf_struct_ops_get(const void *kdata);
758 void bpf_struct_ops_put(const void *kdata);
759 int bpf_struct_ops_map_sys_lookup_elem(struct bpf_map *map, void *key,
761 static inline bool bpf_try_module_get(const void *data, struct module *owner)
763 if (owner == BPF_MODULE_OWNER)
764 return bpf_struct_ops_get(data);
766 return try_module_get(owner);
768 static inline void bpf_module_put(const void *data, struct module *owner)
770 if (owner == BPF_MODULE_OWNER)
771 bpf_struct_ops_put(data);
776 static inline const struct bpf_struct_ops *bpf_struct_ops_find(u32 type_id)
780 static inline void bpf_struct_ops_init(struct btf *btf,
781 struct bpf_verifier_log *log)
784 static inline bool bpf_try_module_get(const void *data, struct module *owner)
786 return try_module_get(owner);
788 static inline void bpf_module_put(const void *data, struct module *owner)
792 static inline int bpf_struct_ops_map_sys_lookup_elem(struct bpf_map *map,
804 struct bpf_array_aux *aux;
806 char value[0] __aligned(8);
807 void *ptrs[0] __aligned(8);
808 void __percpu *pptrs[0] __aligned(8);
812 #define BPF_COMPLEXITY_LIMIT_INSNS 1000000 /* yes. 1M insns */
813 #define MAX_TAIL_CALL_CNT 32
815 #define BPF_F_ACCESS_MASK (BPF_F_RDONLY | \
816 BPF_F_RDONLY_PROG | \
820 #define BPF_MAP_CAN_READ BIT(0)
821 #define BPF_MAP_CAN_WRITE BIT(1)
823 static inline u32 bpf_map_flags_to_cap(struct bpf_map *map)
825 u32 access_flags = map->map_flags & (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG);
827 /* Combination of BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG is
830 if (access_flags & BPF_F_RDONLY_PROG)
831 return BPF_MAP_CAN_READ;
832 else if (access_flags & BPF_F_WRONLY_PROG)
833 return BPF_MAP_CAN_WRITE;
835 return BPF_MAP_CAN_READ | BPF_MAP_CAN_WRITE;
838 static inline bool bpf_map_flags_access_ok(u32 access_flags)
840 return (access_flags & (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG)) !=
841 (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG);
844 struct bpf_event_entry {
845 struct perf_event *event;
846 struct file *perf_file;
847 struct file *map_file;
851 bool bpf_prog_array_compatible(struct bpf_array *array, const struct bpf_prog *fp);
852 int bpf_prog_calc_tag(struct bpf_prog *fp);
853 const char *kernel_type_name(u32 btf_type_id);
855 const struct bpf_func_proto *bpf_get_trace_printk_proto(void);
857 typedef unsigned long (*bpf_ctx_copy_t)(void *dst, const void *src,
858 unsigned long off, unsigned long len);
859 typedef u32 (*bpf_convert_ctx_access_t)(enum bpf_access_type type,
860 const struct bpf_insn *src,
861 struct bpf_insn *dst,
862 struct bpf_prog *prog,
865 u64 bpf_event_output(struct bpf_map *map, u64 flags, void *meta, u64 meta_size,
866 void *ctx, u64 ctx_size, bpf_ctx_copy_t ctx_copy);
868 /* an array of programs to be executed under rcu_lock.
871 * ret = BPF_PROG_RUN_ARRAY(&bpf_prog_array, ctx, BPF_PROG_RUN);
873 * the structure returned by bpf_prog_array_alloc() should be populated
874 * with program pointers and the last pointer must be NULL.
875 * The user has to keep refcnt on the program and make sure the program
876 * is removed from the array before bpf_prog_put().
877 * The 'struct bpf_prog_array *' should only be replaced with xchg()
878 * since other cpus are walking the array of pointers in parallel.
880 struct bpf_prog_array_item {
881 struct bpf_prog *prog;
882 struct bpf_cgroup_storage *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE];
885 struct bpf_prog_array {
887 struct bpf_prog_array_item items[];
890 struct bpf_prog_array *bpf_prog_array_alloc(u32 prog_cnt, gfp_t flags);
891 void bpf_prog_array_free(struct bpf_prog_array *progs);
892 int bpf_prog_array_length(struct bpf_prog_array *progs);
893 bool bpf_prog_array_is_empty(struct bpf_prog_array *array);
894 int bpf_prog_array_copy_to_user(struct bpf_prog_array *progs,
895 __u32 __user *prog_ids, u32 cnt);
897 void bpf_prog_array_delete_safe(struct bpf_prog_array *progs,
898 struct bpf_prog *old_prog);
899 int bpf_prog_array_copy_info(struct bpf_prog_array *array,
900 u32 *prog_ids, u32 request_cnt,
902 int bpf_prog_array_copy(struct bpf_prog_array *old_array,
903 struct bpf_prog *exclude_prog,
904 struct bpf_prog *include_prog,
905 struct bpf_prog_array **new_array);
907 #define __BPF_PROG_RUN_ARRAY(array, ctx, func, check_non_null) \
909 struct bpf_prog_array_item *_item; \
910 struct bpf_prog *_prog; \
911 struct bpf_prog_array *_array; \
915 _array = rcu_dereference(array); \
916 if (unlikely(check_non_null && !_array))\
918 _item = &_array->items[0]; \
919 while ((_prog = READ_ONCE(_item->prog))) { \
920 bpf_cgroup_storage_set(_item->cgroup_storage); \
921 _ret &= func(_prog, ctx); \
930 /* To be used by __cgroup_bpf_run_filter_skb for EGRESS BPF progs
931 * so BPF programs can request cwr for TCP packets.
933 * Current cgroup skb programs can only return 0 or 1 (0 to drop the
934 * packet. This macro changes the behavior so the low order bit
935 * indicates whether the packet should be dropped (0) or not (1)
936 * and the next bit is a congestion notification bit. This could be
937 * used by TCP to call tcp_enter_cwr()
939 * Hence, new allowed return values of CGROUP EGRESS BPF programs are:
942 * 2: drop packet and cn
943 * 3: keep packet and cn
945 * This macro then converts it to one of the NET_XMIT or an error
946 * code that is then interpreted as drop packet (and no cn):
947 * 0: NET_XMIT_SUCCESS skb should be transmitted
948 * 1: NET_XMIT_DROP skb should be dropped and cn
949 * 2: NET_XMIT_CN skb should be transmitted and cn
950 * 3: -EPERM skb should be dropped
952 #define BPF_PROG_CGROUP_INET_EGRESS_RUN_ARRAY(array, ctx, func) \
954 struct bpf_prog_array_item *_item; \
955 struct bpf_prog *_prog; \
956 struct bpf_prog_array *_array; \
962 _array = rcu_dereference(array); \
963 _item = &_array->items[0]; \
964 while ((_prog = READ_ONCE(_item->prog))) { \
965 bpf_cgroup_storage_set(_item->cgroup_storage); \
966 ret = func(_prog, ctx); \
974 _ret = (_cn ? NET_XMIT_CN : NET_XMIT_SUCCESS); \
976 _ret = (_cn ? NET_XMIT_DROP : -EPERM); \
980 #define BPF_PROG_RUN_ARRAY(array, ctx, func) \
981 __BPF_PROG_RUN_ARRAY(array, ctx, func, false)
983 #define BPF_PROG_RUN_ARRAY_CHECK(array, ctx, func) \
984 __BPF_PROG_RUN_ARRAY(array, ctx, func, true)
986 #ifdef CONFIG_BPF_SYSCALL
987 DECLARE_PER_CPU(int, bpf_prog_active);
990 * Block execution of BPF programs attached to instrumentation (perf,
991 * kprobes, tracepoints) to prevent deadlocks on map operations as any of
992 * these events can happen inside a region which holds a map bucket lock
993 * and can deadlock on it.
995 * Use the preemption safe inc/dec variants on RT because migrate disable
996 * is preemptible on RT and preemption in the middle of the RMW operation
997 * might lead to inconsistent state. Use the raw variants for non RT
998 * kernels as migrate_disable() maps to preempt_disable() so the slightly
999 * more expensive save operation can be avoided.
1001 static inline void bpf_disable_instrumentation(void)
1004 if (IS_ENABLED(CONFIG_PREEMPT_RT))
1005 this_cpu_inc(bpf_prog_active);
1007 __this_cpu_inc(bpf_prog_active);
1010 static inline void bpf_enable_instrumentation(void)
1012 if (IS_ENABLED(CONFIG_PREEMPT_RT))
1013 this_cpu_dec(bpf_prog_active);
1015 __this_cpu_dec(bpf_prog_active);
1019 extern const struct file_operations bpf_map_fops;
1020 extern const struct file_operations bpf_prog_fops;
1022 #define BPF_PROG_TYPE(_id, _name, prog_ctx_type, kern_ctx_type) \
1023 extern const struct bpf_prog_ops _name ## _prog_ops; \
1024 extern const struct bpf_verifier_ops _name ## _verifier_ops;
1025 #define BPF_MAP_TYPE(_id, _ops) \
1026 extern const struct bpf_map_ops _ops;
1027 #include <linux/bpf_types.h>
1028 #undef BPF_PROG_TYPE
1031 extern const struct bpf_prog_ops bpf_offload_prog_ops;
1032 extern const struct bpf_verifier_ops tc_cls_act_analyzer_ops;
1033 extern const struct bpf_verifier_ops xdp_analyzer_ops;
1035 struct bpf_prog *bpf_prog_get(u32 ufd);
1036 struct bpf_prog *bpf_prog_get_type_dev(u32 ufd, enum bpf_prog_type type,
1038 void bpf_prog_add(struct bpf_prog *prog, int i);
1039 void bpf_prog_sub(struct bpf_prog *prog, int i);
1040 void bpf_prog_inc(struct bpf_prog *prog);
1041 struct bpf_prog * __must_check bpf_prog_inc_not_zero(struct bpf_prog *prog);
1042 void bpf_prog_put(struct bpf_prog *prog);
1043 int __bpf_prog_charge(struct user_struct *user, u32 pages);
1044 void __bpf_prog_uncharge(struct user_struct *user, u32 pages);
1045 void __bpf_free_used_maps(struct bpf_prog_aux *aux,
1046 struct bpf_map **used_maps, u32 len);
1048 void bpf_prog_free_id(struct bpf_prog *prog, bool do_idr_lock);
1049 void bpf_map_free_id(struct bpf_map *map, bool do_idr_lock);
1051 struct bpf_map *bpf_map_get(u32 ufd);
1052 struct bpf_map *bpf_map_get_with_uref(u32 ufd);
1053 struct bpf_map *__bpf_map_get(struct fd f);
1054 void bpf_map_inc(struct bpf_map *map);
1055 void bpf_map_inc_with_uref(struct bpf_map *map);
1056 struct bpf_map * __must_check bpf_map_inc_not_zero(struct bpf_map *map);
1057 void bpf_map_put_with_uref(struct bpf_map *map);
1058 void bpf_map_put(struct bpf_map *map);
1059 int bpf_map_charge_memlock(struct bpf_map *map, u32 pages);
1060 void bpf_map_uncharge_memlock(struct bpf_map *map, u32 pages);
1061 int bpf_map_charge_init(struct bpf_map_memory *mem, u64 size);
1062 void bpf_map_charge_finish(struct bpf_map_memory *mem);
1063 void bpf_map_charge_move(struct bpf_map_memory *dst,
1064 struct bpf_map_memory *src);
1065 void *bpf_map_area_alloc(u64 size, int numa_node);
1066 void *bpf_map_area_mmapable_alloc(u64 size, int numa_node);
1067 void bpf_map_area_free(void *base);
1068 void bpf_map_init_from_attr(struct bpf_map *map, union bpf_attr *attr);
1069 int generic_map_lookup_batch(struct bpf_map *map,
1070 const union bpf_attr *attr,
1071 union bpf_attr __user *uattr);
1072 int generic_map_update_batch(struct bpf_map *map,
1073 const union bpf_attr *attr,
1074 union bpf_attr __user *uattr);
1075 int generic_map_delete_batch(struct bpf_map *map,
1076 const union bpf_attr *attr,
1077 union bpf_attr __user *uattr);
1079 extern int sysctl_unprivileged_bpf_disabled;
1081 int bpf_map_new_fd(struct bpf_map *map, int flags);
1082 int bpf_prog_new_fd(struct bpf_prog *prog);
1086 struct bpf_link_ops {
1087 void (*release)(struct bpf_link *link);
1088 void (*dealloc)(struct bpf_link *link);
1091 void bpf_link_init(struct bpf_link *link, const struct bpf_link_ops *ops,
1092 struct bpf_prog *prog);
1093 void bpf_link_inc(struct bpf_link *link);
1094 void bpf_link_put(struct bpf_link *link);
1095 int bpf_link_new_fd(struct bpf_link *link);
1096 struct file *bpf_link_new_file(struct bpf_link *link, int *reserved_fd);
1097 struct bpf_link *bpf_link_get_from_fd(u32 ufd);
1099 int bpf_obj_pin_user(u32 ufd, const char __user *pathname);
1100 int bpf_obj_get_user(const char __user *pathname, int flags);
1102 int bpf_percpu_hash_copy(struct bpf_map *map, void *key, void *value);
1103 int bpf_percpu_array_copy(struct bpf_map *map, void *key, void *value);
1104 int bpf_percpu_hash_update(struct bpf_map *map, void *key, void *value,
1106 int bpf_percpu_array_update(struct bpf_map *map, void *key, void *value,
1109 int bpf_stackmap_copy(struct bpf_map *map, void *key, void *value);
1111 int bpf_fd_array_map_update_elem(struct bpf_map *map, struct file *map_file,
1112 void *key, void *value, u64 map_flags);
1113 int bpf_fd_array_map_lookup_elem(struct bpf_map *map, void *key, u32 *value);
1114 int bpf_fd_htab_map_update_elem(struct bpf_map *map, struct file *map_file,
1115 void *key, void *value, u64 map_flags);
1116 int bpf_fd_htab_map_lookup_elem(struct bpf_map *map, void *key, u32 *value);
1118 int bpf_get_file_flag(int flags);
1119 int bpf_check_uarg_tail_zero(void __user *uaddr, size_t expected_size,
1120 size_t actual_size);
1122 /* memcpy that is used with 8-byte aligned pointers, power-of-8 size and
1123 * forced to use 'long' read/writes to try to atomically copy long counters.
1124 * Best-effort only. No barriers here, since it _will_ race with concurrent
1125 * updates from BPF programs. Called from bpf syscall and mostly used with
1126 * size 8 or 16 bytes, so ask compiler to inline it.
1128 static inline void bpf_long_memcpy(void *dst, const void *src, u32 size)
1130 const long *lsrc = src;
1133 size /= sizeof(long);
1138 /* verify correctness of eBPF program */
1139 int bpf_check(struct bpf_prog **fp, union bpf_attr *attr,
1140 union bpf_attr __user *uattr);
1141 void bpf_patch_call_args(struct bpf_insn *insn, u32 stack_depth);
1147 struct bpf_dtab_netdev *__dev_map_lookup_elem(struct bpf_map *map, u32 key);
1148 struct bpf_dtab_netdev *__dev_map_hash_lookup_elem(struct bpf_map *map, u32 key);
1149 void __dev_flush(void);
1150 int dev_xdp_enqueue(struct net_device *dev, struct xdp_buff *xdp,
1151 struct net_device *dev_rx);
1152 int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp,
1153 struct net_device *dev_rx);
1154 int dev_map_generic_redirect(struct bpf_dtab_netdev *dst, struct sk_buff *skb,
1155 struct bpf_prog *xdp_prog);
1157 struct bpf_cpu_map_entry *__cpu_map_lookup_elem(struct bpf_map *map, u32 key);
1158 void __cpu_map_flush(void);
1159 int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu, struct xdp_buff *xdp,
1160 struct net_device *dev_rx);
1162 /* Return map's numa specified by userspace */
1163 static inline int bpf_map_attr_numa_node(const union bpf_attr *attr)
1165 return (attr->map_flags & BPF_F_NUMA_NODE) ?
1166 attr->numa_node : NUMA_NO_NODE;
1169 struct bpf_prog *bpf_prog_get_type_path(const char *name, enum bpf_prog_type type);
1170 int array_map_alloc_check(union bpf_attr *attr);
1172 int bpf_prog_test_run_xdp(struct bpf_prog *prog, const union bpf_attr *kattr,
1173 union bpf_attr __user *uattr);
1174 int bpf_prog_test_run_skb(struct bpf_prog *prog, const union bpf_attr *kattr,
1175 union bpf_attr __user *uattr);
1176 int bpf_prog_test_run_tracing(struct bpf_prog *prog,
1177 const union bpf_attr *kattr,
1178 union bpf_attr __user *uattr);
1179 int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog,
1180 const union bpf_attr *kattr,
1181 union bpf_attr __user *uattr);
1182 bool btf_ctx_access(int off, int size, enum bpf_access_type type,
1183 const struct bpf_prog *prog,
1184 struct bpf_insn_access_aux *info);
1185 int btf_struct_access(struct bpf_verifier_log *log,
1186 const struct btf_type *t, int off, int size,
1187 enum bpf_access_type atype,
1189 int btf_resolve_helper_id(struct bpf_verifier_log *log,
1190 const struct bpf_func_proto *fn, int);
1192 int btf_distill_func_proto(struct bpf_verifier_log *log,
1194 const struct btf_type *func_proto,
1195 const char *func_name,
1196 struct btf_func_model *m);
1198 struct bpf_reg_state;
1199 int btf_check_func_arg_match(struct bpf_verifier_env *env, int subprog,
1200 struct bpf_reg_state *regs);
1201 int btf_prepare_func_args(struct bpf_verifier_env *env, int subprog,
1202 struct bpf_reg_state *reg);
1203 int btf_check_type_match(struct bpf_verifier_env *env, struct bpf_prog *prog,
1204 struct btf *btf, const struct btf_type *t);
1206 struct bpf_prog *bpf_prog_by_id(u32 id);
1208 #else /* !CONFIG_BPF_SYSCALL */
1209 static inline struct bpf_prog *bpf_prog_get(u32 ufd)
1211 return ERR_PTR(-EOPNOTSUPP);
1214 static inline struct bpf_prog *bpf_prog_get_type_dev(u32 ufd,
1215 enum bpf_prog_type type,
1218 return ERR_PTR(-EOPNOTSUPP);
1221 static inline void bpf_prog_add(struct bpf_prog *prog, int i)
1225 static inline void bpf_prog_sub(struct bpf_prog *prog, int i)
1229 static inline void bpf_prog_put(struct bpf_prog *prog)
1233 static inline void bpf_prog_inc(struct bpf_prog *prog)
1237 static inline struct bpf_prog *__must_check
1238 bpf_prog_inc_not_zero(struct bpf_prog *prog)
1240 return ERR_PTR(-EOPNOTSUPP);
1243 static inline int __bpf_prog_charge(struct user_struct *user, u32 pages)
1248 static inline void __bpf_prog_uncharge(struct user_struct *user, u32 pages)
1252 static inline int bpf_obj_get_user(const char __user *pathname, int flags)
1257 static inline struct net_device *__dev_map_lookup_elem(struct bpf_map *map,
1263 static inline struct net_device *__dev_map_hash_lookup_elem(struct bpf_map *map,
1269 static inline void __dev_flush(void)
1274 struct bpf_dtab_netdev;
1277 int dev_xdp_enqueue(struct net_device *dev, struct xdp_buff *xdp,
1278 struct net_device *dev_rx)
1284 int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp,
1285 struct net_device *dev_rx)
1292 static inline int dev_map_generic_redirect(struct bpf_dtab_netdev *dst,
1293 struct sk_buff *skb,
1294 struct bpf_prog *xdp_prog)
1300 struct bpf_cpu_map_entry *__cpu_map_lookup_elem(struct bpf_map *map, u32 key)
1305 static inline void __cpu_map_flush(void)
1309 static inline int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu,
1310 struct xdp_buff *xdp,
1311 struct net_device *dev_rx)
1316 static inline struct bpf_prog *bpf_prog_get_type_path(const char *name,
1317 enum bpf_prog_type type)
1319 return ERR_PTR(-EOPNOTSUPP);
1322 static inline int bpf_prog_test_run_xdp(struct bpf_prog *prog,
1323 const union bpf_attr *kattr,
1324 union bpf_attr __user *uattr)
1329 static inline int bpf_prog_test_run_skb(struct bpf_prog *prog,
1330 const union bpf_attr *kattr,
1331 union bpf_attr __user *uattr)
1336 static inline int bpf_prog_test_run_tracing(struct bpf_prog *prog,
1337 const union bpf_attr *kattr,
1338 union bpf_attr __user *uattr)
1343 static inline int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog,
1344 const union bpf_attr *kattr,
1345 union bpf_attr __user *uattr)
1350 static inline void bpf_map_put(struct bpf_map *map)
1354 static inline struct bpf_prog *bpf_prog_by_id(u32 id)
1356 return ERR_PTR(-ENOTSUPP);
1358 #endif /* CONFIG_BPF_SYSCALL */
1360 static inline struct bpf_prog *bpf_prog_get_type(u32 ufd,
1361 enum bpf_prog_type type)
1363 return bpf_prog_get_type_dev(ufd, type, false);
1366 bool bpf_prog_get_ok(struct bpf_prog *, enum bpf_prog_type *, bool);
1368 int bpf_prog_offload_compile(struct bpf_prog *prog);
1369 void bpf_prog_offload_destroy(struct bpf_prog *prog);
1370 int bpf_prog_offload_info_fill(struct bpf_prog_info *info,
1371 struct bpf_prog *prog);
1373 int bpf_map_offload_info_fill(struct bpf_map_info *info, struct bpf_map *map);
1375 int bpf_map_offload_lookup_elem(struct bpf_map *map, void *key, void *value);
1376 int bpf_map_offload_update_elem(struct bpf_map *map,
1377 void *key, void *value, u64 flags);
1378 int bpf_map_offload_delete_elem(struct bpf_map *map, void *key);
1379 int bpf_map_offload_get_next_key(struct bpf_map *map,
1380 void *key, void *next_key);
1382 bool bpf_offload_prog_map_match(struct bpf_prog *prog, struct bpf_map *map);
1384 struct bpf_offload_dev *
1385 bpf_offload_dev_create(const struct bpf_prog_offload_ops *ops, void *priv);
1386 void bpf_offload_dev_destroy(struct bpf_offload_dev *offdev);
1387 void *bpf_offload_dev_priv(struct bpf_offload_dev *offdev);
1388 int bpf_offload_dev_netdev_register(struct bpf_offload_dev *offdev,
1389 struct net_device *netdev);
1390 void bpf_offload_dev_netdev_unregister(struct bpf_offload_dev *offdev,
1391 struct net_device *netdev);
1392 bool bpf_offload_dev_match(struct bpf_prog *prog, struct net_device *netdev);
1394 #if defined(CONFIG_NET) && defined(CONFIG_BPF_SYSCALL)
1395 int bpf_prog_offload_init(struct bpf_prog *prog, union bpf_attr *attr);
1397 static inline bool bpf_prog_is_dev_bound(const struct bpf_prog_aux *aux)
1399 return aux->offload_requested;
1402 static inline bool bpf_map_is_dev_bound(struct bpf_map *map)
1404 return unlikely(map->ops == &bpf_map_offload_ops);
1407 struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr);
1408 void bpf_map_offload_map_free(struct bpf_map *map);
1410 static inline int bpf_prog_offload_init(struct bpf_prog *prog,
1411 union bpf_attr *attr)
1416 static inline bool bpf_prog_is_dev_bound(struct bpf_prog_aux *aux)
1421 static inline bool bpf_map_is_dev_bound(struct bpf_map *map)
1426 static inline struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr)
1428 return ERR_PTR(-EOPNOTSUPP);
1431 static inline void bpf_map_offload_map_free(struct bpf_map *map)
1434 #endif /* CONFIG_NET && CONFIG_BPF_SYSCALL */
1436 #if defined(CONFIG_BPF_STREAM_PARSER)
1437 int sock_map_prog_update(struct bpf_map *map, struct bpf_prog *prog, u32 which);
1438 int sock_map_get_from_fd(const union bpf_attr *attr, struct bpf_prog *prog);
1439 void sock_map_unhash(struct sock *sk);
1440 void sock_map_close(struct sock *sk, long timeout);
1442 static inline int sock_map_prog_update(struct bpf_map *map,
1443 struct bpf_prog *prog, u32 which)
1448 static inline int sock_map_get_from_fd(const union bpf_attr *attr,
1449 struct bpf_prog *prog)
1453 #endif /* CONFIG_BPF_STREAM_PARSER */
1455 #if defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL)
1456 void bpf_sk_reuseport_detach(struct sock *sk);
1457 int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map, void *key,
1459 int bpf_fd_reuseport_array_update_elem(struct bpf_map *map, void *key,
1460 void *value, u64 map_flags);
1462 static inline void bpf_sk_reuseport_detach(struct sock *sk)
1466 #ifdef CONFIG_BPF_SYSCALL
1467 static inline int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map,
1468 void *key, void *value)
1473 static inline int bpf_fd_reuseport_array_update_elem(struct bpf_map *map,
1474 void *key, void *value,
1479 #endif /* CONFIG_BPF_SYSCALL */
1480 #endif /* defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL) */
1482 /* verifier prototypes for helper functions called from eBPF programs */
1483 extern const struct bpf_func_proto bpf_map_lookup_elem_proto;
1484 extern const struct bpf_func_proto bpf_map_update_elem_proto;
1485 extern const struct bpf_func_proto bpf_map_delete_elem_proto;
1486 extern const struct bpf_func_proto bpf_map_push_elem_proto;
1487 extern const struct bpf_func_proto bpf_map_pop_elem_proto;
1488 extern const struct bpf_func_proto bpf_map_peek_elem_proto;
1490 extern const struct bpf_func_proto bpf_get_prandom_u32_proto;
1491 extern const struct bpf_func_proto bpf_get_smp_processor_id_proto;
1492 extern const struct bpf_func_proto bpf_get_numa_node_id_proto;
1493 extern const struct bpf_func_proto bpf_tail_call_proto;
1494 extern const struct bpf_func_proto bpf_ktime_get_ns_proto;
1495 extern const struct bpf_func_proto bpf_get_current_pid_tgid_proto;
1496 extern const struct bpf_func_proto bpf_get_current_uid_gid_proto;
1497 extern const struct bpf_func_proto bpf_get_current_comm_proto;
1498 extern const struct bpf_func_proto bpf_get_stackid_proto;
1499 extern const struct bpf_func_proto bpf_get_stack_proto;
1500 extern const struct bpf_func_proto bpf_sock_map_update_proto;
1501 extern const struct bpf_func_proto bpf_sock_hash_update_proto;
1502 extern const struct bpf_func_proto bpf_get_current_cgroup_id_proto;
1503 extern const struct bpf_func_proto bpf_msg_redirect_hash_proto;
1504 extern const struct bpf_func_proto bpf_msg_redirect_map_proto;
1505 extern const struct bpf_func_proto bpf_sk_redirect_hash_proto;
1506 extern const struct bpf_func_proto bpf_sk_redirect_map_proto;
1507 extern const struct bpf_func_proto bpf_spin_lock_proto;
1508 extern const struct bpf_func_proto bpf_spin_unlock_proto;
1509 extern const struct bpf_func_proto bpf_get_local_storage_proto;
1510 extern const struct bpf_func_proto bpf_strtol_proto;
1511 extern const struct bpf_func_proto bpf_strtoul_proto;
1512 extern const struct bpf_func_proto bpf_tcp_sock_proto;
1513 extern const struct bpf_func_proto bpf_jiffies64_proto;
1514 extern const struct bpf_func_proto bpf_get_ns_current_pid_tgid_proto;
1516 /* Shared helpers among cBPF and eBPF. */
1517 void bpf_user_rnd_init_once(void);
1518 u64 bpf_user_rnd_u32(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
1520 #if defined(CONFIG_NET)
1521 bool bpf_sock_common_is_valid_access(int off, int size,
1522 enum bpf_access_type type,
1523 struct bpf_insn_access_aux *info);
1524 bool bpf_sock_is_valid_access(int off, int size, enum bpf_access_type type,
1525 struct bpf_insn_access_aux *info);
1526 u32 bpf_sock_convert_ctx_access(enum bpf_access_type type,
1527 const struct bpf_insn *si,
1528 struct bpf_insn *insn_buf,
1529 struct bpf_prog *prog,
1532 static inline bool bpf_sock_common_is_valid_access(int off, int size,
1533 enum bpf_access_type type,
1534 struct bpf_insn_access_aux *info)
1538 static inline bool bpf_sock_is_valid_access(int off, int size,
1539 enum bpf_access_type type,
1540 struct bpf_insn_access_aux *info)
1544 static inline u32 bpf_sock_convert_ctx_access(enum bpf_access_type type,
1545 const struct bpf_insn *si,
1546 struct bpf_insn *insn_buf,
1547 struct bpf_prog *prog,
1555 struct sk_reuseport_kern {
1556 struct sk_buff *skb;
1558 struct sock *selected_sk;
1564 bool bpf_tcp_sock_is_valid_access(int off, int size, enum bpf_access_type type,
1565 struct bpf_insn_access_aux *info);
1567 u32 bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type,
1568 const struct bpf_insn *si,
1569 struct bpf_insn *insn_buf,
1570 struct bpf_prog *prog,
1573 bool bpf_xdp_sock_is_valid_access(int off, int size, enum bpf_access_type type,
1574 struct bpf_insn_access_aux *info);
1576 u32 bpf_xdp_sock_convert_ctx_access(enum bpf_access_type type,
1577 const struct bpf_insn *si,
1578 struct bpf_insn *insn_buf,
1579 struct bpf_prog *prog,
1582 static inline bool bpf_tcp_sock_is_valid_access(int off, int size,
1583 enum bpf_access_type type,
1584 struct bpf_insn_access_aux *info)
1589 static inline u32 bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type,
1590 const struct bpf_insn *si,
1591 struct bpf_insn *insn_buf,
1592 struct bpf_prog *prog,
1597 static inline bool bpf_xdp_sock_is_valid_access(int off, int size,
1598 enum bpf_access_type type,
1599 struct bpf_insn_access_aux *info)
1604 static inline u32 bpf_xdp_sock_convert_ctx_access(enum bpf_access_type type,
1605 const struct bpf_insn *si,
1606 struct bpf_insn *insn_buf,
1607 struct bpf_prog *prog,
1612 #endif /* CONFIG_INET */
1614 enum bpf_text_poke_type {
1619 int bpf_arch_text_poke(void *ip, enum bpf_text_poke_type t,
1620 void *addr1, void *addr2);
1622 #endif /* _LINUX_BPF_H */