Commit | Line | Data |
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25763b3c | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
99c55f7d | 2 | /* Copyright (c) 2011-2014 PLUMgrid, http://plumgrid.com |
99c55f7d AS |
3 | */ |
4 | #ifndef _LINUX_BPF_H | |
5 | #define _LINUX_BPF_H 1 | |
6 | ||
7 | #include <uapi/linux/bpf.h> | |
74451e66 | 8 | |
99c55f7d | 9 | #include <linux/workqueue.h> |
db20fd2b | 10 | #include <linux/file.h> |
b121d1e7 | 11 | #include <linux/percpu.h> |
002245cc | 12 | #include <linux/err.h> |
74451e66 | 13 | #include <linux/rbtree_latch.h> |
d6e1e46f | 14 | #include <linux/numa.h> |
fc970227 | 15 | #include <linux/mm_types.h> |
ab3f0063 | 16 | #include <linux/wait.h> |
492ecee8 | 17 | #include <linux/u64_stats_sync.h> |
fec56f58 AS |
18 | #include <linux/refcount.h> |
19 | #include <linux/mutex.h> | |
99c55f7d | 20 | |
cae1927c | 21 | struct bpf_verifier_env; |
9e15db66 | 22 | struct bpf_verifier_log; |
3b1efb19 | 23 | struct perf_event; |
174a79ff | 24 | struct bpf_prog; |
da765a2f | 25 | struct bpf_prog_aux; |
99c55f7d | 26 | struct bpf_map; |
4f738adb | 27 | struct sock; |
a26ca7c9 | 28 | struct seq_file; |
1b2b234b | 29 | struct btf; |
e8d2bec0 | 30 | struct btf_type; |
3dec541b | 31 | struct exception_table_entry; |
99c55f7d | 32 | |
1b9ed84e QM |
33 | extern struct idr btf_idr; |
34 | extern spinlock_t btf_idr_lock; | |
35 | ||
99c55f7d AS |
36 | /* map is generic key/value storage optionally accesible by eBPF programs */ |
37 | struct bpf_map_ops { | |
38 | /* funcs callable from userspace (via syscall) */ | |
1110f3a9 | 39 | int (*map_alloc_check)(union bpf_attr *attr); |
99c55f7d | 40 | struct bpf_map *(*map_alloc)(union bpf_attr *attr); |
61d1b6a4 DB |
41 | void (*map_release)(struct bpf_map *map, struct file *map_file); |
42 | void (*map_free)(struct bpf_map *map); | |
db20fd2b | 43 | int (*map_get_next_key)(struct bpf_map *map, void *key, void *next_key); |
ba6b8de4 | 44 | void (*map_release_uref)(struct bpf_map *map); |
c6110222 | 45 | void *(*map_lookup_elem_sys_only)(struct bpf_map *map, void *key); |
db20fd2b AS |
46 | |
47 | /* funcs callable from userspace and from eBPF programs */ | |
48 | void *(*map_lookup_elem)(struct bpf_map *map, void *key); | |
3274f520 | 49 | int (*map_update_elem)(struct bpf_map *map, void *key, void *value, u64 flags); |
db20fd2b | 50 | int (*map_delete_elem)(struct bpf_map *map, void *key); |
f1a2e44a MV |
51 | int (*map_push_elem)(struct bpf_map *map, void *value, u64 flags); |
52 | int (*map_pop_elem)(struct bpf_map *map, void *value); | |
53 | int (*map_peek_elem)(struct bpf_map *map, void *value); | |
2a36f0b9 WN |
54 | |
55 | /* funcs called by prog_array and perf_event_array map */ | |
d056a788 DB |
56 | void *(*map_fd_get_ptr)(struct bpf_map *map, struct file *map_file, |
57 | int fd); | |
58 | void (*map_fd_put_ptr)(void *ptr); | |
81ed18ab | 59 | u32 (*map_gen_lookup)(struct bpf_map *map, struct bpf_insn *insn_buf); |
14dc6f04 | 60 | u32 (*map_fd_sys_lookup_elem)(void *ptr); |
a26ca7c9 MKL |
61 | void (*map_seq_show_elem)(struct bpf_map *map, void *key, |
62 | struct seq_file *m); | |
e8d2bec0 | 63 | int (*map_check_btf)(const struct bpf_map *map, |
1b2b234b | 64 | const struct btf *btf, |
e8d2bec0 DB |
65 | const struct btf_type *key_type, |
66 | const struct btf_type *value_type); | |
d8eca5bb | 67 | |
da765a2f DB |
68 | /* Prog poke tracking helpers. */ |
69 | int (*map_poke_track)(struct bpf_map *map, struct bpf_prog_aux *aux); | |
70 | void (*map_poke_untrack)(struct bpf_map *map, struct bpf_prog_aux *aux); | |
71 | void (*map_poke_run)(struct bpf_map *map, u32 key, struct bpf_prog *old, | |
72 | struct bpf_prog *new); | |
73 | ||
d8eca5bb DB |
74 | /* Direct value access helpers. */ |
75 | int (*map_direct_value_addr)(const struct bpf_map *map, | |
76 | u64 *imm, u32 off); | |
77 | int (*map_direct_value_meta)(const struct bpf_map *map, | |
78 | u64 imm, u32 *off); | |
fc970227 | 79 | int (*map_mmap)(struct bpf_map *map, struct vm_area_struct *vma); |
99c55f7d AS |
80 | }; |
81 | ||
3539b96e RG |
82 | struct bpf_map_memory { |
83 | u32 pages; | |
84 | struct user_struct *user; | |
85 | }; | |
86 | ||
99c55f7d | 87 | struct bpf_map { |
a26ca7c9 | 88 | /* The first two cachelines with read-mostly members of which some |
be95a845 DB |
89 | * are also accessed in fast-path (e.g. ops, max_entries). |
90 | */ | |
91 | const struct bpf_map_ops *ops ____cacheline_aligned; | |
92 | struct bpf_map *inner_map_meta; | |
93 | #ifdef CONFIG_SECURITY | |
94 | void *security; | |
95 | #endif | |
99c55f7d AS |
96 | enum bpf_map_type map_type; |
97 | u32 key_size; | |
98 | u32 value_size; | |
99 | u32 max_entries; | |
6c905981 | 100 | u32 map_flags; |
d83525ca | 101 | int spin_lock_off; /* >=0 valid offset, <0 error */ |
f3f1c054 | 102 | u32 id; |
96eabe7a | 103 | int numa_node; |
9b2cf328 MKL |
104 | u32 btf_key_type_id; |
105 | u32 btf_value_type_id; | |
a26ca7c9 | 106 | struct btf *btf; |
3539b96e | 107 | struct bpf_map_memory memory; |
fc970227 | 108 | char name[BPF_OBJ_NAME_LEN]; |
b2157399 | 109 | bool unpriv_array; |
fc970227 AN |
110 | bool frozen; /* write-once; write-protected by freeze_mutex */ |
111 | /* 22 bytes hole */ | |
be95a845 | 112 | |
a26ca7c9 | 113 | /* The 3rd and 4th cacheline with misc members to avoid false sharing |
be95a845 DB |
114 | * particularly with refcounting. |
115 | */ | |
1e0bd5a0 AN |
116 | atomic64_t refcnt ____cacheline_aligned; |
117 | atomic64_t usercnt; | |
be95a845 | 118 | struct work_struct work; |
fc970227 AN |
119 | struct mutex freeze_mutex; |
120 | u64 writecnt; /* writable mmap cnt; protected by freeze_mutex */ | |
99c55f7d AS |
121 | }; |
122 | ||
d83525ca AS |
123 | static inline bool map_value_has_spin_lock(const struct bpf_map *map) |
124 | { | |
125 | return map->spin_lock_off >= 0; | |
126 | } | |
127 | ||
128 | static inline void check_and_init_map_lock(struct bpf_map *map, void *dst) | |
129 | { | |
130 | if (likely(!map_value_has_spin_lock(map))) | |
131 | return; | |
132 | *(struct bpf_spin_lock *)(dst + map->spin_lock_off) = | |
133 | (struct bpf_spin_lock){}; | |
134 | } | |
135 | ||
136 | /* copy everything but bpf_spin_lock */ | |
137 | static inline void copy_map_value(struct bpf_map *map, void *dst, void *src) | |
138 | { | |
139 | if (unlikely(map_value_has_spin_lock(map))) { | |
140 | u32 off = map->spin_lock_off; | |
141 | ||
142 | memcpy(dst, src, off); | |
143 | memcpy(dst + off + sizeof(struct bpf_spin_lock), | |
144 | src + off + sizeof(struct bpf_spin_lock), | |
145 | map->value_size - off - sizeof(struct bpf_spin_lock)); | |
146 | } else { | |
147 | memcpy(dst, src, map->value_size); | |
148 | } | |
149 | } | |
96049f3a AS |
150 | void copy_map_value_locked(struct bpf_map *map, void *dst, void *src, |
151 | bool lock_src); | |
d83525ca | 152 | |
602144c2 | 153 | struct bpf_offload_dev; |
a3884572 JK |
154 | struct bpf_offloaded_map; |
155 | ||
156 | struct bpf_map_dev_ops { | |
157 | int (*map_get_next_key)(struct bpf_offloaded_map *map, | |
158 | void *key, void *next_key); | |
159 | int (*map_lookup_elem)(struct bpf_offloaded_map *map, | |
160 | void *key, void *value); | |
161 | int (*map_update_elem)(struct bpf_offloaded_map *map, | |
162 | void *key, void *value, u64 flags); | |
163 | int (*map_delete_elem)(struct bpf_offloaded_map *map, void *key); | |
164 | }; | |
165 | ||
166 | struct bpf_offloaded_map { | |
167 | struct bpf_map map; | |
168 | struct net_device *netdev; | |
169 | const struct bpf_map_dev_ops *dev_ops; | |
170 | void *dev_priv; | |
171 | struct list_head offloads; | |
172 | }; | |
173 | ||
174 | static inline struct bpf_offloaded_map *map_to_offmap(struct bpf_map *map) | |
175 | { | |
176 | return container_of(map, struct bpf_offloaded_map, map); | |
177 | } | |
178 | ||
0cd3cbed JK |
179 | static inline bool bpf_map_offload_neutral(const struct bpf_map *map) |
180 | { | |
181 | return map->map_type == BPF_MAP_TYPE_PERF_EVENT_ARRAY; | |
182 | } | |
183 | ||
a26ca7c9 MKL |
184 | static inline bool bpf_map_support_seq_show(const struct bpf_map *map) |
185 | { | |
e8d2bec0 | 186 | return map->btf && map->ops->map_seq_show_elem; |
a26ca7c9 MKL |
187 | } |
188 | ||
e8d2bec0 | 189 | int map_check_no_btf(const struct bpf_map *map, |
1b2b234b | 190 | const struct btf *btf, |
e8d2bec0 DB |
191 | const struct btf_type *key_type, |
192 | const struct btf_type *value_type); | |
193 | ||
a3884572 JK |
194 | extern const struct bpf_map_ops bpf_map_offload_ops; |
195 | ||
17a52670 AS |
196 | /* function argument constraints */ |
197 | enum bpf_arg_type { | |
80f1d68c | 198 | ARG_DONTCARE = 0, /* unused argument in helper function */ |
17a52670 AS |
199 | |
200 | /* the following constraints used to prototype | |
201 | * bpf_map_lookup/update/delete_elem() functions | |
202 | */ | |
203 | ARG_CONST_MAP_PTR, /* const argument used as pointer to bpf_map */ | |
204 | ARG_PTR_TO_MAP_KEY, /* pointer to stack used as map key */ | |
205 | ARG_PTR_TO_MAP_VALUE, /* pointer to stack used as map value */ | |
2ea864c5 | 206 | ARG_PTR_TO_UNINIT_MAP_VALUE, /* pointer to valid memory used to store a map value */ |
6ac99e8f | 207 | ARG_PTR_TO_MAP_VALUE_OR_NULL, /* pointer to stack used as map value or NULL */ |
17a52670 AS |
208 | |
209 | /* the following constraints used to prototype bpf_memcmp() and other | |
210 | * functions that access data on eBPF program stack | |
211 | */ | |
39f19ebb | 212 | ARG_PTR_TO_MEM, /* pointer to valid memory (stack, packet, map value) */ |
db1ac496 | 213 | ARG_PTR_TO_MEM_OR_NULL, /* pointer to valid memory or NULL */ |
39f19ebb AS |
214 | ARG_PTR_TO_UNINIT_MEM, /* pointer to memory does not need to be initialized, |
215 | * helper function must fill all bytes or clear | |
216 | * them in error case. | |
435faee1 DB |
217 | */ |
218 | ||
39f19ebb AS |
219 | ARG_CONST_SIZE, /* number of bytes accessed from memory */ |
220 | ARG_CONST_SIZE_OR_ZERO, /* number of bytes accessed from memory or 0 */ | |
80f1d68c | 221 | |
608cd71a | 222 | ARG_PTR_TO_CTX, /* pointer to context */ |
80f1d68c | 223 | ARG_ANYTHING, /* any (initialized) argument is ok */ |
d83525ca | 224 | ARG_PTR_TO_SPIN_LOCK, /* pointer to bpf_spin_lock */ |
46f8bc92 | 225 | ARG_PTR_TO_SOCK_COMMON, /* pointer to sock_common */ |
57c3bb72 AI |
226 | ARG_PTR_TO_INT, /* pointer to int */ |
227 | ARG_PTR_TO_LONG, /* pointer to long */ | |
6ac99e8f | 228 | ARG_PTR_TO_SOCKET, /* pointer to bpf_sock (fullsock) */ |
a7658e1a | 229 | ARG_PTR_TO_BTF_ID, /* pointer to in-kernel struct */ |
17a52670 AS |
230 | }; |
231 | ||
232 | /* type of values returned from helper functions */ | |
233 | enum bpf_return_type { | |
234 | RET_INTEGER, /* function returns integer */ | |
235 | RET_VOID, /* function doesn't return anything */ | |
3e6a4b3e | 236 | RET_PTR_TO_MAP_VALUE, /* returns a pointer to map elem value */ |
17a52670 | 237 | RET_PTR_TO_MAP_VALUE_OR_NULL, /* returns a pointer to map elem value or NULL */ |
c64b7983 | 238 | RET_PTR_TO_SOCKET_OR_NULL, /* returns a pointer to a socket or NULL */ |
655a51e5 | 239 | RET_PTR_TO_TCP_SOCK_OR_NULL, /* returns a pointer to a tcp_sock or NULL */ |
85a51f8c | 240 | RET_PTR_TO_SOCK_COMMON_OR_NULL, /* returns a pointer to a sock_common or NULL */ |
17a52670 AS |
241 | }; |
242 | ||
09756af4 AS |
243 | /* eBPF function prototype used by verifier to allow BPF_CALLs from eBPF programs |
244 | * to in-kernel helper functions and for adjusting imm32 field in BPF_CALL | |
245 | * instructions after verifying | |
246 | */ | |
247 | struct bpf_func_proto { | |
248 | u64 (*func)(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5); | |
249 | bool gpl_only; | |
36bbef52 | 250 | bool pkt_access; |
17a52670 | 251 | enum bpf_return_type ret_type; |
a7658e1a AS |
252 | union { |
253 | struct { | |
254 | enum bpf_arg_type arg1_type; | |
255 | enum bpf_arg_type arg2_type; | |
256 | enum bpf_arg_type arg3_type; | |
257 | enum bpf_arg_type arg4_type; | |
258 | enum bpf_arg_type arg5_type; | |
259 | }; | |
260 | enum bpf_arg_type arg_type[5]; | |
261 | }; | |
9cc31b3a | 262 | int *btf_id; /* BTF ids of arguments */ |
17a52670 AS |
263 | }; |
264 | ||
265 | /* bpf_context is intentionally undefined structure. Pointer to bpf_context is | |
266 | * the first argument to eBPF programs. | |
267 | * For socket filters: 'struct bpf_context *' == 'struct sk_buff *' | |
268 | */ | |
269 | struct bpf_context; | |
270 | ||
271 | enum bpf_access_type { | |
272 | BPF_READ = 1, | |
273 | BPF_WRITE = 2 | |
09756af4 AS |
274 | }; |
275 | ||
19de99f7 | 276 | /* types of values stored in eBPF registers */ |
f1174f77 EC |
277 | /* Pointer types represent: |
278 | * pointer | |
279 | * pointer + imm | |
280 | * pointer + (u16) var | |
281 | * pointer + (u16) var + imm | |
282 | * if (range > 0) then [ptr, ptr + range - off) is safe to access | |
283 | * if (id > 0) means that some 'var' was added | |
284 | * if (off > 0) means that 'imm' was added | |
285 | */ | |
19de99f7 AS |
286 | enum bpf_reg_type { |
287 | NOT_INIT = 0, /* nothing was written into register */ | |
f1174f77 | 288 | SCALAR_VALUE, /* reg doesn't contain a valid pointer */ |
19de99f7 AS |
289 | PTR_TO_CTX, /* reg points to bpf_context */ |
290 | CONST_PTR_TO_MAP, /* reg points to struct bpf_map */ | |
291 | PTR_TO_MAP_VALUE, /* reg points to map element value */ | |
292 | PTR_TO_MAP_VALUE_OR_NULL,/* points to map elem value or NULL */ | |
f1174f77 | 293 | PTR_TO_STACK, /* reg == frame_pointer + offset */ |
de8f3a83 | 294 | PTR_TO_PACKET_META, /* skb->data - meta_len */ |
f1174f77 | 295 | PTR_TO_PACKET, /* reg points to skb->data */ |
19de99f7 | 296 | PTR_TO_PACKET_END, /* skb->data + headlen */ |
d58e468b | 297 | PTR_TO_FLOW_KEYS, /* reg points to bpf_flow_keys */ |
c64b7983 JS |
298 | PTR_TO_SOCKET, /* reg points to struct bpf_sock */ |
299 | PTR_TO_SOCKET_OR_NULL, /* reg points to struct bpf_sock or NULL */ | |
46f8bc92 MKL |
300 | PTR_TO_SOCK_COMMON, /* reg points to sock_common */ |
301 | PTR_TO_SOCK_COMMON_OR_NULL, /* reg points to sock_common or NULL */ | |
655a51e5 MKL |
302 | PTR_TO_TCP_SOCK, /* reg points to struct tcp_sock */ |
303 | PTR_TO_TCP_SOCK_OR_NULL, /* reg points to struct tcp_sock or NULL */ | |
9df1c28b | 304 | PTR_TO_TP_BUFFER, /* reg points to a writable raw tp's buffer */ |
fada7fdc | 305 | PTR_TO_XDP_SOCK, /* reg points to struct xdp_sock */ |
9e15db66 | 306 | PTR_TO_BTF_ID, /* reg points to kernel struct */ |
19de99f7 AS |
307 | }; |
308 | ||
23994631 YS |
309 | /* The information passed from prog-specific *_is_valid_access |
310 | * back to the verifier. | |
311 | */ | |
312 | struct bpf_insn_access_aux { | |
313 | enum bpf_reg_type reg_type; | |
9e15db66 AS |
314 | union { |
315 | int ctx_field_size; | |
316 | u32 btf_id; | |
317 | }; | |
318 | struct bpf_verifier_log *log; /* for verbose logs */ | |
23994631 YS |
319 | }; |
320 | ||
f96da094 DB |
321 | static inline void |
322 | bpf_ctx_record_field_size(struct bpf_insn_access_aux *aux, u32 size) | |
323 | { | |
324 | aux->ctx_field_size = size; | |
325 | } | |
326 | ||
7de16e3a JK |
327 | struct bpf_prog_ops { |
328 | int (*test_run)(struct bpf_prog *prog, const union bpf_attr *kattr, | |
329 | union bpf_attr __user *uattr); | |
330 | }; | |
331 | ||
09756af4 AS |
332 | struct bpf_verifier_ops { |
333 | /* return eBPF function prototype for verification */ | |
5e43f899 AI |
334 | const struct bpf_func_proto * |
335 | (*get_func_proto)(enum bpf_func_id func_id, | |
336 | const struct bpf_prog *prog); | |
17a52670 AS |
337 | |
338 | /* return true if 'size' wide access at offset 'off' within bpf_context | |
339 | * with 'type' (read or write) is allowed | |
340 | */ | |
19de99f7 | 341 | bool (*is_valid_access)(int off, int size, enum bpf_access_type type, |
5e43f899 | 342 | const struct bpf_prog *prog, |
23994631 | 343 | struct bpf_insn_access_aux *info); |
36bbef52 DB |
344 | int (*gen_prologue)(struct bpf_insn *insn, bool direct_write, |
345 | const struct bpf_prog *prog); | |
e0cea7ce DB |
346 | int (*gen_ld_abs)(const struct bpf_insn *orig, |
347 | struct bpf_insn *insn_buf); | |
6b8cc1d1 DB |
348 | u32 (*convert_ctx_access)(enum bpf_access_type type, |
349 | const struct bpf_insn *src, | |
350 | struct bpf_insn *dst, | |
f96da094 | 351 | struct bpf_prog *prog, u32 *target_size); |
09756af4 AS |
352 | }; |
353 | ||
cae1927c | 354 | struct bpf_prog_offload_ops { |
08ca90af | 355 | /* verifier basic callbacks */ |
cae1927c JK |
356 | int (*insn_hook)(struct bpf_verifier_env *env, |
357 | int insn_idx, int prev_insn_idx); | |
c941ce9c | 358 | int (*finalize)(struct bpf_verifier_env *env); |
08ca90af JK |
359 | /* verifier optimization callbacks (called after .finalize) */ |
360 | int (*replace_insn)(struct bpf_verifier_env *env, u32 off, | |
361 | struct bpf_insn *insn); | |
362 | int (*remove_insns)(struct bpf_verifier_env *env, u32 off, u32 cnt); | |
363 | /* program management callbacks */ | |
16a8cb5c QM |
364 | int (*prepare)(struct bpf_prog *prog); |
365 | int (*translate)(struct bpf_prog *prog); | |
eb911947 | 366 | void (*destroy)(struct bpf_prog *prog); |
cae1927c JK |
367 | }; |
368 | ||
0a9c1991 | 369 | struct bpf_prog_offload { |
ab3f0063 JK |
370 | struct bpf_prog *prog; |
371 | struct net_device *netdev; | |
341b3e7b | 372 | struct bpf_offload_dev *offdev; |
ab3f0063 JK |
373 | void *dev_priv; |
374 | struct list_head offloads; | |
375 | bool dev_state; | |
08ca90af | 376 | bool opt_failed; |
fcfb126d JW |
377 | void *jited_image; |
378 | u32 jited_len; | |
ab3f0063 JK |
379 | }; |
380 | ||
8bad74f9 RG |
381 | enum bpf_cgroup_storage_type { |
382 | BPF_CGROUP_STORAGE_SHARED, | |
b741f163 | 383 | BPF_CGROUP_STORAGE_PERCPU, |
8bad74f9 RG |
384 | __BPF_CGROUP_STORAGE_MAX |
385 | }; | |
386 | ||
387 | #define MAX_BPF_CGROUP_STORAGE_TYPE __BPF_CGROUP_STORAGE_MAX | |
388 | ||
f1b9509c AS |
389 | /* The longest tracepoint has 12 args. |
390 | * See include/trace/bpf_probe.h | |
391 | */ | |
392 | #define MAX_BPF_FUNC_ARGS 12 | |
393 | ||
492ecee8 AS |
394 | struct bpf_prog_stats { |
395 | u64 cnt; | |
396 | u64 nsecs; | |
397 | struct u64_stats_sync syncp; | |
84a081f6 | 398 | } __aligned(2 * sizeof(u64)); |
492ecee8 | 399 | |
fec56f58 AS |
400 | struct btf_func_model { |
401 | u8 ret_size; | |
402 | u8 nr_args; | |
403 | u8 arg_size[MAX_BPF_FUNC_ARGS]; | |
404 | }; | |
405 | ||
406 | /* Restore arguments before returning from trampoline to let original function | |
407 | * continue executing. This flag is used for fentry progs when there are no | |
408 | * fexit progs. | |
409 | */ | |
410 | #define BPF_TRAMP_F_RESTORE_REGS BIT(0) | |
411 | /* Call original function after fentry progs, but before fexit progs. | |
412 | * Makes sense for fentry/fexit, normal calls and indirect calls. | |
413 | */ | |
414 | #define BPF_TRAMP_F_CALL_ORIG BIT(1) | |
415 | /* Skip current frame and return to parent. Makes sense for fentry/fexit | |
416 | * programs only. Should not be used with normal calls and indirect calls. | |
417 | */ | |
418 | #define BPF_TRAMP_F_SKIP_FRAME BIT(2) | |
419 | ||
420 | /* Different use cases for BPF trampoline: | |
421 | * 1. replace nop at the function entry (kprobe equivalent) | |
422 | * flags = BPF_TRAMP_F_RESTORE_REGS | |
423 | * fentry = a set of programs to run before returning from trampoline | |
424 | * | |
425 | * 2. replace nop at the function entry (kprobe + kretprobe equivalent) | |
426 | * flags = BPF_TRAMP_F_CALL_ORIG | BPF_TRAMP_F_SKIP_FRAME | |
427 | * orig_call = fentry_ip + MCOUNT_INSN_SIZE | |
428 | * fentry = a set of program to run before calling original function | |
429 | * fexit = a set of program to run after original function | |
430 | * | |
431 | * 3. replace direct call instruction anywhere in the function body | |
432 | * or assign a function pointer for indirect call (like tcp_congestion_ops->cong_avoid) | |
433 | * With flags = 0 | |
434 | * fentry = a set of programs to run before returning from trampoline | |
435 | * With flags = BPF_TRAMP_F_CALL_ORIG | |
436 | * orig_call = original callback addr or direct function addr | |
437 | * fentry = a set of program to run before calling original function | |
438 | * fexit = a set of program to run after original function | |
439 | */ | |
440 | int arch_prepare_bpf_trampoline(void *image, struct btf_func_model *m, u32 flags, | |
441 | struct bpf_prog **fentry_progs, int fentry_cnt, | |
442 | struct bpf_prog **fexit_progs, int fexit_cnt, | |
443 | void *orig_call); | |
444 | /* these two functions are called from generated trampoline */ | |
445 | u64 notrace __bpf_prog_enter(void); | |
446 | void notrace __bpf_prog_exit(struct bpf_prog *prog, u64 start); | |
447 | ||
448 | enum bpf_tramp_prog_type { | |
449 | BPF_TRAMP_FENTRY, | |
450 | BPF_TRAMP_FEXIT, | |
451 | BPF_TRAMP_MAX | |
452 | }; | |
453 | ||
454 | struct bpf_trampoline { | |
455 | /* hlist for trampoline_table */ | |
456 | struct hlist_node hlist; | |
457 | /* serializes access to fields of this trampoline */ | |
458 | struct mutex mutex; | |
459 | refcount_t refcnt; | |
460 | u64 key; | |
461 | struct { | |
462 | struct btf_func_model model; | |
463 | void *addr; | |
b91e014f | 464 | bool ftrace_managed; |
fec56f58 AS |
465 | } func; |
466 | /* list of BPF programs using this trampoline */ | |
467 | struct hlist_head progs_hlist[BPF_TRAMP_MAX]; | |
468 | /* Number of attached programs. A counter per kind. */ | |
469 | int progs_cnt[BPF_TRAMP_MAX]; | |
470 | /* Executable image of trampoline */ | |
471 | void *image; | |
472 | u64 selector; | |
473 | }; | |
75ccbef6 | 474 | |
116eb788 | 475 | #define BPF_DISPATCHER_MAX 48 /* Fits in 2048B */ |
75ccbef6 BT |
476 | |
477 | struct bpf_dispatcher_prog { | |
478 | struct bpf_prog *prog; | |
479 | refcount_t users; | |
480 | }; | |
481 | ||
482 | struct bpf_dispatcher { | |
483 | /* dispatcher mutex */ | |
484 | struct mutex mutex; | |
485 | void *func; | |
486 | struct bpf_dispatcher_prog progs[BPF_DISPATCHER_MAX]; | |
487 | int num_progs; | |
488 | void *image; | |
489 | u32 image_off; | |
490 | }; | |
491 | ||
7e6897f9 BT |
492 | static __always_inline unsigned int bpf_dispatcher_nopfunc( |
493 | const void *ctx, | |
494 | const struct bpf_insn *insnsi, | |
495 | unsigned int (*bpf_func)(const void *, | |
496 | const struct bpf_insn *)) | |
497 | { | |
498 | return bpf_func(ctx, insnsi); | |
499 | } | |
fec56f58 AS |
500 | #ifdef CONFIG_BPF_JIT |
501 | struct bpf_trampoline *bpf_trampoline_lookup(u64 key); | |
502 | int bpf_trampoline_link_prog(struct bpf_prog *prog); | |
503 | int bpf_trampoline_unlink_prog(struct bpf_prog *prog); | |
504 | void bpf_trampoline_put(struct bpf_trampoline *tr); | |
98e8627e | 505 | void *bpf_jit_alloc_exec_page(void); |
75ccbef6 BT |
506 | #define BPF_DISPATCHER_INIT(name) { \ |
507 | .mutex = __MUTEX_INITIALIZER(name.mutex), \ | |
508 | .func = &name##func, \ | |
509 | .progs = {}, \ | |
510 | .num_progs = 0, \ | |
511 | .image = NULL, \ | |
512 | .image_off = 0 \ | |
513 | } | |
514 | ||
515 | #define DEFINE_BPF_DISPATCHER(name) \ | |
516 | noinline unsigned int name##func( \ | |
517 | const void *ctx, \ | |
518 | const struct bpf_insn *insnsi, \ | |
519 | unsigned int (*bpf_func)(const void *, \ | |
520 | const struct bpf_insn *)) \ | |
521 | { \ | |
522 | return bpf_func(ctx, insnsi); \ | |
523 | } \ | |
524 | EXPORT_SYMBOL(name##func); \ | |
525 | struct bpf_dispatcher name = BPF_DISPATCHER_INIT(name); | |
526 | #define DECLARE_BPF_DISPATCHER(name) \ | |
527 | unsigned int name##func( \ | |
528 | const void *ctx, \ | |
529 | const struct bpf_insn *insnsi, \ | |
530 | unsigned int (*bpf_func)(const void *, \ | |
531 | const struct bpf_insn *)); \ | |
532 | extern struct bpf_dispatcher name; | |
533 | #define BPF_DISPATCHER_FUNC(name) name##func | |
534 | #define BPF_DISPATCHER_PTR(name) (&name) | |
535 | void bpf_dispatcher_change_prog(struct bpf_dispatcher *d, struct bpf_prog *from, | |
536 | struct bpf_prog *to); | |
fec56f58 AS |
537 | #else |
538 | static inline struct bpf_trampoline *bpf_trampoline_lookup(u64 key) | |
539 | { | |
540 | return NULL; | |
541 | } | |
542 | static inline int bpf_trampoline_link_prog(struct bpf_prog *prog) | |
543 | { | |
544 | return -ENOTSUPP; | |
545 | } | |
546 | static inline int bpf_trampoline_unlink_prog(struct bpf_prog *prog) | |
547 | { | |
548 | return -ENOTSUPP; | |
549 | } | |
550 | static inline void bpf_trampoline_put(struct bpf_trampoline *tr) {} | |
75ccbef6 BT |
551 | #define DEFINE_BPF_DISPATCHER(name) |
552 | #define DECLARE_BPF_DISPATCHER(name) | |
553 | #define BPF_DISPATCHER_FUNC(name) bpf_dispatcher_nopfunc | |
554 | #define BPF_DISPATCHER_PTR(name) NULL | |
555 | static inline void bpf_dispatcher_change_prog(struct bpf_dispatcher *d, | |
556 | struct bpf_prog *from, | |
557 | struct bpf_prog *to) {} | |
fec56f58 AS |
558 | #endif |
559 | ||
8c1b6e69 AS |
560 | struct bpf_func_info_aux { |
561 | bool unreliable; | |
562 | }; | |
563 | ||
a66886fe DB |
564 | enum bpf_jit_poke_reason { |
565 | BPF_POKE_REASON_TAIL_CALL, | |
566 | }; | |
567 | ||
568 | /* Descriptor of pokes pointing /into/ the JITed image. */ | |
569 | struct bpf_jit_poke_descriptor { | |
570 | void *ip; | |
571 | union { | |
572 | struct { | |
573 | struct bpf_map *map; | |
574 | u32 key; | |
575 | } tail_call; | |
576 | }; | |
577 | bool ip_stable; | |
578 | u8 adj_off; | |
579 | u16 reason; | |
580 | }; | |
581 | ||
09756af4 | 582 | struct bpf_prog_aux { |
85192dbf | 583 | atomic64_t refcnt; |
24701ece | 584 | u32 used_map_cnt; |
32bbe007 | 585 | u32 max_ctx_offset; |
e647815a | 586 | u32 max_pkt_offset; |
9df1c28b | 587 | u32 max_tp_access; |
8726679a | 588 | u32 stack_depth; |
dc4bb0e2 | 589 | u32 id; |
ba64e7d8 YS |
590 | u32 func_cnt; /* used by non-func prog as the number of func progs */ |
591 | u32 func_idx; /* 0 for non-func prog, the index in func array for func prog */ | |
ccfe29eb | 592 | u32 attach_btf_id; /* in-kernel BTF type id to attach to */ |
5b92a28a | 593 | struct bpf_prog *linked_prog; |
a4b1d3c1 | 594 | bool verifier_zext; /* Zero extensions has been inserted by verifier. */ |
9a18eedb | 595 | bool offload_requested; |
38207291 | 596 | bool attach_btf_trace; /* true if attaching to BTF-enabled raw tp */ |
8c1b6e69 | 597 | bool func_proto_unreliable; |
fec56f58 AS |
598 | enum bpf_tramp_prog_type trampoline_prog_type; |
599 | struct bpf_trampoline *trampoline; | |
600 | struct hlist_node tramp_hlist; | |
38207291 MKL |
601 | /* BTF_KIND_FUNC_PROTO for valid attach_btf_id */ |
602 | const struct btf_type *attach_func_proto; | |
603 | /* function name for valid attach_btf_id */ | |
604 | const char *attach_func_name; | |
1c2a088a AS |
605 | struct bpf_prog **func; |
606 | void *jit_data; /* JIT specific data. arch dependent */ | |
a66886fe DB |
607 | struct bpf_jit_poke_descriptor *poke_tab; |
608 | u32 size_poke_tab; | |
74451e66 DB |
609 | struct latch_tree_node ksym_tnode; |
610 | struct list_head ksym_lnode; | |
7de16e3a | 611 | const struct bpf_prog_ops *ops; |
09756af4 | 612 | struct bpf_map **used_maps; |
09756af4 | 613 | struct bpf_prog *prog; |
aaac3ba9 | 614 | struct user_struct *user; |
cb4d2b3f | 615 | u64 load_time; /* ns since boottime */ |
8bad74f9 | 616 | struct bpf_map *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE]; |
067cae47 | 617 | char name[BPF_OBJ_NAME_LEN]; |
afdb09c7 CF |
618 | #ifdef CONFIG_SECURITY |
619 | void *security; | |
620 | #endif | |
0a9c1991 | 621 | struct bpf_prog_offload *offload; |
838e9690 | 622 | struct btf *btf; |
ba64e7d8 | 623 | struct bpf_func_info *func_info; |
8c1b6e69 | 624 | struct bpf_func_info_aux *func_info_aux; |
c454a46b MKL |
625 | /* bpf_line_info loaded from userspace. linfo->insn_off |
626 | * has the xlated insn offset. | |
627 | * Both the main and sub prog share the same linfo. | |
628 | * The subprog can access its first linfo by | |
629 | * using the linfo_idx. | |
630 | */ | |
631 | struct bpf_line_info *linfo; | |
632 | /* jited_linfo is the jited addr of the linfo. It has a | |
633 | * one to one mapping to linfo: | |
634 | * jited_linfo[i] is the jited addr for the linfo[i]->insn_off. | |
635 | * Both the main and sub prog share the same jited_linfo. | |
636 | * The subprog can access its first jited_linfo by | |
637 | * using the linfo_idx. | |
638 | */ | |
639 | void **jited_linfo; | |
ba64e7d8 | 640 | u32 func_info_cnt; |
c454a46b MKL |
641 | u32 nr_linfo; |
642 | /* subprog can use linfo_idx to access its first linfo and | |
643 | * jited_linfo. | |
644 | * main prog always has linfo_idx == 0 | |
645 | */ | |
646 | u32 linfo_idx; | |
3dec541b AS |
647 | u32 num_exentries; |
648 | struct exception_table_entry *extable; | |
492ecee8 | 649 | struct bpf_prog_stats __percpu *stats; |
abf2e7d6 AS |
650 | union { |
651 | struct work_struct work; | |
652 | struct rcu_head rcu; | |
653 | }; | |
09756af4 AS |
654 | }; |
655 | ||
2beee5f5 DB |
656 | struct bpf_array_aux { |
657 | /* 'Ownership' of prog array is claimed by the first program that | |
658 | * is going to use this map or by the first program which FD is | |
659 | * stored in the map to make sure that all callers and callees have | |
660 | * the same prog type and JITed flag. | |
661 | */ | |
662 | enum bpf_prog_type type; | |
663 | bool jited; | |
da765a2f DB |
664 | /* Programs with direct jumps into programs part of this array. */ |
665 | struct list_head poke_progs; | |
666 | struct bpf_map *map; | |
667 | struct mutex poke_mutex; | |
668 | struct work_struct work; | |
2beee5f5 DB |
669 | }; |
670 | ||
04fd61ab AS |
671 | struct bpf_array { |
672 | struct bpf_map map; | |
673 | u32 elem_size; | |
b2157399 | 674 | u32 index_mask; |
2beee5f5 | 675 | struct bpf_array_aux *aux; |
04fd61ab AS |
676 | union { |
677 | char value[0] __aligned(8); | |
2a36f0b9 | 678 | void *ptrs[0] __aligned(8); |
a10423b8 | 679 | void __percpu *pptrs[0] __aligned(8); |
04fd61ab AS |
680 | }; |
681 | }; | |
3b1efb19 | 682 | |
c04c0d2b | 683 | #define BPF_COMPLEXITY_LIMIT_INSNS 1000000 /* yes. 1M insns */ |
04fd61ab AS |
684 | #define MAX_TAIL_CALL_CNT 32 |
685 | ||
591fe988 DB |
686 | #define BPF_F_ACCESS_MASK (BPF_F_RDONLY | \ |
687 | BPF_F_RDONLY_PROG | \ | |
688 | BPF_F_WRONLY | \ | |
689 | BPF_F_WRONLY_PROG) | |
690 | ||
691 | #define BPF_MAP_CAN_READ BIT(0) | |
692 | #define BPF_MAP_CAN_WRITE BIT(1) | |
693 | ||
694 | static inline u32 bpf_map_flags_to_cap(struct bpf_map *map) | |
695 | { | |
696 | u32 access_flags = map->map_flags & (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG); | |
697 | ||
698 | /* Combination of BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG is | |
699 | * not possible. | |
700 | */ | |
701 | if (access_flags & BPF_F_RDONLY_PROG) | |
702 | return BPF_MAP_CAN_READ; | |
703 | else if (access_flags & BPF_F_WRONLY_PROG) | |
704 | return BPF_MAP_CAN_WRITE; | |
705 | else | |
706 | return BPF_MAP_CAN_READ | BPF_MAP_CAN_WRITE; | |
707 | } | |
708 | ||
709 | static inline bool bpf_map_flags_access_ok(u32 access_flags) | |
710 | { | |
711 | return (access_flags & (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG)) != | |
712 | (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG); | |
713 | } | |
714 | ||
3b1efb19 DB |
715 | struct bpf_event_entry { |
716 | struct perf_event *event; | |
717 | struct file *perf_file; | |
718 | struct file *map_file; | |
719 | struct rcu_head rcu; | |
720 | }; | |
721 | ||
04fd61ab | 722 | bool bpf_prog_array_compatible(struct bpf_array *array, const struct bpf_prog *fp); |
f1f7714e | 723 | int bpf_prog_calc_tag(struct bpf_prog *fp); |
9e15db66 | 724 | const char *kernel_type_name(u32 btf_type_id); |
bd570ff9 | 725 | |
0756ea3e | 726 | const struct bpf_func_proto *bpf_get_trace_printk_proto(void); |
555c8a86 DB |
727 | |
728 | typedef unsigned long (*bpf_ctx_copy_t)(void *dst, const void *src, | |
aa7145c1 | 729 | unsigned long off, unsigned long len); |
c64b7983 JS |
730 | typedef u32 (*bpf_convert_ctx_access_t)(enum bpf_access_type type, |
731 | const struct bpf_insn *src, | |
732 | struct bpf_insn *dst, | |
733 | struct bpf_prog *prog, | |
734 | u32 *target_size); | |
555c8a86 DB |
735 | |
736 | u64 bpf_event_output(struct bpf_map *map, u64 flags, void *meta, u64 meta_size, | |
737 | void *ctx, u64 ctx_size, bpf_ctx_copy_t ctx_copy); | |
04fd61ab | 738 | |
324bda9e AS |
739 | /* an array of programs to be executed under rcu_lock. |
740 | * | |
741 | * Typical usage: | |
742 | * ret = BPF_PROG_RUN_ARRAY(&bpf_prog_array, ctx, BPF_PROG_RUN); | |
743 | * | |
744 | * the structure returned by bpf_prog_array_alloc() should be populated | |
745 | * with program pointers and the last pointer must be NULL. | |
746 | * The user has to keep refcnt on the program and make sure the program | |
747 | * is removed from the array before bpf_prog_put(). | |
748 | * The 'struct bpf_prog_array *' should only be replaced with xchg() | |
749 | * since other cpus are walking the array of pointers in parallel. | |
750 | */ | |
394e40a2 RG |
751 | struct bpf_prog_array_item { |
752 | struct bpf_prog *prog; | |
8bad74f9 | 753 | struct bpf_cgroup_storage *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE]; |
394e40a2 RG |
754 | }; |
755 | ||
324bda9e AS |
756 | struct bpf_prog_array { |
757 | struct rcu_head rcu; | |
394e40a2 | 758 | struct bpf_prog_array_item items[0]; |
324bda9e AS |
759 | }; |
760 | ||
d29ab6e1 | 761 | struct bpf_prog_array *bpf_prog_array_alloc(u32 prog_cnt, gfp_t flags); |
54e9c9d4 SF |
762 | void bpf_prog_array_free(struct bpf_prog_array *progs); |
763 | int bpf_prog_array_length(struct bpf_prog_array *progs); | |
0d01da6a | 764 | bool bpf_prog_array_is_empty(struct bpf_prog_array *array); |
54e9c9d4 | 765 | int bpf_prog_array_copy_to_user(struct bpf_prog_array *progs, |
468e2f64 | 766 | __u32 __user *prog_ids, u32 cnt); |
324bda9e | 767 | |
54e9c9d4 | 768 | void bpf_prog_array_delete_safe(struct bpf_prog_array *progs, |
e87c6bc3 | 769 | struct bpf_prog *old_prog); |
54e9c9d4 | 770 | int bpf_prog_array_copy_info(struct bpf_prog_array *array, |
3a38bb98 YS |
771 | u32 *prog_ids, u32 request_cnt, |
772 | u32 *prog_cnt); | |
54e9c9d4 | 773 | int bpf_prog_array_copy(struct bpf_prog_array *old_array, |
e87c6bc3 YS |
774 | struct bpf_prog *exclude_prog, |
775 | struct bpf_prog *include_prog, | |
776 | struct bpf_prog_array **new_array); | |
777 | ||
778 | #define __BPF_PROG_RUN_ARRAY(array, ctx, func, check_non_null) \ | |
324bda9e | 779 | ({ \ |
394e40a2 RG |
780 | struct bpf_prog_array_item *_item; \ |
781 | struct bpf_prog *_prog; \ | |
e87c6bc3 | 782 | struct bpf_prog_array *_array; \ |
324bda9e | 783 | u32 _ret = 1; \ |
6899b32b | 784 | preempt_disable(); \ |
324bda9e | 785 | rcu_read_lock(); \ |
e87c6bc3 YS |
786 | _array = rcu_dereference(array); \ |
787 | if (unlikely(check_non_null && !_array))\ | |
788 | goto _out; \ | |
394e40a2 RG |
789 | _item = &_array->items[0]; \ |
790 | while ((_prog = READ_ONCE(_item->prog))) { \ | |
791 | bpf_cgroup_storage_set(_item->cgroup_storage); \ | |
792 | _ret &= func(_prog, ctx); \ | |
793 | _item++; \ | |
e87c6bc3 YS |
794 | } \ |
795 | _out: \ | |
324bda9e | 796 | rcu_read_unlock(); \ |
0edd6b64 | 797 | preempt_enable(); \ |
324bda9e AS |
798 | _ret; \ |
799 | }) | |
800 | ||
1f52f6c0 | 801 | /* To be used by __cgroup_bpf_run_filter_skb for EGRESS BPF progs |
802 | * so BPF programs can request cwr for TCP packets. | |
803 | * | |
804 | * Current cgroup skb programs can only return 0 or 1 (0 to drop the | |
805 | * packet. This macro changes the behavior so the low order bit | |
806 | * indicates whether the packet should be dropped (0) or not (1) | |
807 | * and the next bit is a congestion notification bit. This could be | |
808 | * used by TCP to call tcp_enter_cwr() | |
809 | * | |
810 | * Hence, new allowed return values of CGROUP EGRESS BPF programs are: | |
811 | * 0: drop packet | |
812 | * 1: keep packet | |
813 | * 2: drop packet and cn | |
814 | * 3: keep packet and cn | |
815 | * | |
816 | * This macro then converts it to one of the NET_XMIT or an error | |
817 | * code that is then interpreted as drop packet (and no cn): | |
818 | * 0: NET_XMIT_SUCCESS skb should be transmitted | |
819 | * 1: NET_XMIT_DROP skb should be dropped and cn | |
820 | * 2: NET_XMIT_CN skb should be transmitted and cn | |
821 | * 3: -EPERM skb should be dropped | |
822 | */ | |
823 | #define BPF_PROG_CGROUP_INET_EGRESS_RUN_ARRAY(array, ctx, func) \ | |
824 | ({ \ | |
825 | struct bpf_prog_array_item *_item; \ | |
826 | struct bpf_prog *_prog; \ | |
827 | struct bpf_prog_array *_array; \ | |
828 | u32 ret; \ | |
829 | u32 _ret = 1; \ | |
830 | u32 _cn = 0; \ | |
831 | preempt_disable(); \ | |
832 | rcu_read_lock(); \ | |
833 | _array = rcu_dereference(array); \ | |
834 | _item = &_array->items[0]; \ | |
835 | while ((_prog = READ_ONCE(_item->prog))) { \ | |
836 | bpf_cgroup_storage_set(_item->cgroup_storage); \ | |
837 | ret = func(_prog, ctx); \ | |
838 | _ret &= (ret & 1); \ | |
839 | _cn |= (ret & 2); \ | |
840 | _item++; \ | |
841 | } \ | |
842 | rcu_read_unlock(); \ | |
843 | preempt_enable(); \ | |
844 | if (_ret) \ | |
845 | _ret = (_cn ? NET_XMIT_CN : NET_XMIT_SUCCESS); \ | |
846 | else \ | |
847 | _ret = (_cn ? NET_XMIT_DROP : -EPERM); \ | |
848 | _ret; \ | |
849 | }) | |
850 | ||
e87c6bc3 YS |
851 | #define BPF_PROG_RUN_ARRAY(array, ctx, func) \ |
852 | __BPF_PROG_RUN_ARRAY(array, ctx, func, false) | |
853 | ||
854 | #define BPF_PROG_RUN_ARRAY_CHECK(array, ctx, func) \ | |
855 | __BPF_PROG_RUN_ARRAY(array, ctx, func, true) | |
856 | ||
89aa0758 | 857 | #ifdef CONFIG_BPF_SYSCALL |
b121d1e7 AS |
858 | DECLARE_PER_CPU(int, bpf_prog_active); |
859 | ||
f66e448c CF |
860 | extern const struct file_operations bpf_map_fops; |
861 | extern const struct file_operations bpf_prog_fops; | |
862 | ||
91cc1a99 | 863 | #define BPF_PROG_TYPE(_id, _name, prog_ctx_type, kern_ctx_type) \ |
7de16e3a JK |
864 | extern const struct bpf_prog_ops _name ## _prog_ops; \ |
865 | extern const struct bpf_verifier_ops _name ## _verifier_ops; | |
40077e0c JB |
866 | #define BPF_MAP_TYPE(_id, _ops) \ |
867 | extern const struct bpf_map_ops _ops; | |
be9370a7 JB |
868 | #include <linux/bpf_types.h> |
869 | #undef BPF_PROG_TYPE | |
40077e0c | 870 | #undef BPF_MAP_TYPE |
0fc174de | 871 | |
ab3f0063 | 872 | extern const struct bpf_prog_ops bpf_offload_prog_ops; |
4f9218aa JK |
873 | extern const struct bpf_verifier_ops tc_cls_act_analyzer_ops; |
874 | extern const struct bpf_verifier_ops xdp_analyzer_ops; | |
875 | ||
0fc174de | 876 | struct bpf_prog *bpf_prog_get(u32 ufd); |
248f346f | 877 | struct bpf_prog *bpf_prog_get_type_dev(u32 ufd, enum bpf_prog_type type, |
288b3de5 | 878 | bool attach_drv); |
85192dbf | 879 | void bpf_prog_add(struct bpf_prog *prog, int i); |
c540594f | 880 | void bpf_prog_sub(struct bpf_prog *prog, int i); |
85192dbf | 881 | void bpf_prog_inc(struct bpf_prog *prog); |
a6f6df69 | 882 | struct bpf_prog * __must_check bpf_prog_inc_not_zero(struct bpf_prog *prog); |
61e021f3 | 883 | void bpf_prog_put(struct bpf_prog *prog); |
5ccb071e DB |
884 | int __bpf_prog_charge(struct user_struct *user, u32 pages); |
885 | void __bpf_prog_uncharge(struct user_struct *user, u32 pages); | |
a2ea0746 DB |
886 | void __bpf_free_used_maps(struct bpf_prog_aux *aux, |
887 | struct bpf_map **used_maps, u32 len); | |
61e021f3 | 888 | |
ad8ad79f | 889 | void bpf_prog_free_id(struct bpf_prog *prog, bool do_idr_lock); |
a3884572 | 890 | void bpf_map_free_id(struct bpf_map *map, bool do_idr_lock); |
ad8ad79f | 891 | |
c9da161c | 892 | struct bpf_map *bpf_map_get_with_uref(u32 ufd); |
c2101297 | 893 | struct bpf_map *__bpf_map_get(struct fd f); |
1e0bd5a0 AN |
894 | void bpf_map_inc(struct bpf_map *map); |
895 | void bpf_map_inc_with_uref(struct bpf_map *map); | |
896 | struct bpf_map * __must_check bpf_map_inc_not_zero(struct bpf_map *map); | |
c9da161c | 897 | void bpf_map_put_with_uref(struct bpf_map *map); |
61e021f3 | 898 | void bpf_map_put(struct bpf_map *map); |
0a4c58f5 RG |
899 | int bpf_map_charge_memlock(struct bpf_map *map, u32 pages); |
900 | void bpf_map_uncharge_memlock(struct bpf_map *map, u32 pages); | |
196e8ca7 | 901 | int bpf_map_charge_init(struct bpf_map_memory *mem, u64 size); |
b936ca64 RG |
902 | void bpf_map_charge_finish(struct bpf_map_memory *mem); |
903 | void bpf_map_charge_move(struct bpf_map_memory *dst, | |
904 | struct bpf_map_memory *src); | |
196e8ca7 DB |
905 | void *bpf_map_area_alloc(u64 size, int numa_node); |
906 | void *bpf_map_area_mmapable_alloc(u64 size, int numa_node); | |
d407bd25 | 907 | void bpf_map_area_free(void *base); |
bd475643 | 908 | void bpf_map_init_from_attr(struct bpf_map *map, union bpf_attr *attr); |
61e021f3 | 909 | |
1be7f75d AS |
910 | extern int sysctl_unprivileged_bpf_disabled; |
911 | ||
6e71b04a | 912 | int bpf_map_new_fd(struct bpf_map *map, int flags); |
b2197755 DB |
913 | int bpf_prog_new_fd(struct bpf_prog *prog); |
914 | ||
915 | int bpf_obj_pin_user(u32 ufd, const char __user *pathname); | |
6e71b04a | 916 | int bpf_obj_get_user(const char __user *pathname, int flags); |
b2197755 | 917 | |
15a07b33 AS |
918 | int bpf_percpu_hash_copy(struct bpf_map *map, void *key, void *value); |
919 | int bpf_percpu_array_copy(struct bpf_map *map, void *key, void *value); | |
920 | int bpf_percpu_hash_update(struct bpf_map *map, void *key, void *value, | |
921 | u64 flags); | |
922 | int bpf_percpu_array_update(struct bpf_map *map, void *key, void *value, | |
923 | u64 flags); | |
d056a788 | 924 | |
557c0c6e | 925 | int bpf_stackmap_copy(struct bpf_map *map, void *key, void *value); |
15a07b33 | 926 | |
d056a788 DB |
927 | int bpf_fd_array_map_update_elem(struct bpf_map *map, struct file *map_file, |
928 | void *key, void *value, u64 map_flags); | |
14dc6f04 | 929 | int bpf_fd_array_map_lookup_elem(struct bpf_map *map, void *key, u32 *value); |
bcc6b1b7 MKL |
930 | int bpf_fd_htab_map_update_elem(struct bpf_map *map, struct file *map_file, |
931 | void *key, void *value, u64 map_flags); | |
14dc6f04 | 932 | int bpf_fd_htab_map_lookup_elem(struct bpf_map *map, void *key, u32 *value); |
d056a788 | 933 | |
6e71b04a | 934 | int bpf_get_file_flag(int flags); |
dcab51f1 MKL |
935 | int bpf_check_uarg_tail_zero(void __user *uaddr, size_t expected_size, |
936 | size_t actual_size); | |
6e71b04a | 937 | |
15a07b33 AS |
938 | /* memcpy that is used with 8-byte aligned pointers, power-of-8 size and |
939 | * forced to use 'long' read/writes to try to atomically copy long counters. | |
940 | * Best-effort only. No barriers here, since it _will_ race with concurrent | |
941 | * updates from BPF programs. Called from bpf syscall and mostly used with | |
942 | * size 8 or 16 bytes, so ask compiler to inline it. | |
943 | */ | |
944 | static inline void bpf_long_memcpy(void *dst, const void *src, u32 size) | |
945 | { | |
946 | const long *lsrc = src; | |
947 | long *ldst = dst; | |
948 | ||
949 | size /= sizeof(long); | |
950 | while (size--) | |
951 | *ldst++ = *lsrc++; | |
952 | } | |
953 | ||
61e021f3 | 954 | /* verify correctness of eBPF program */ |
838e9690 YS |
955 | int bpf_check(struct bpf_prog **fp, union bpf_attr *attr, |
956 | union bpf_attr __user *uattr); | |
1ea47e01 | 957 | void bpf_patch_call_args(struct bpf_insn *insn, u32 stack_depth); |
46f55cff JF |
958 | |
959 | /* Map specifics */ | |
67f29e07 | 960 | struct xdp_buff; |
6d5fc195 | 961 | struct sk_buff; |
67f29e07 JDB |
962 | |
963 | struct bpf_dtab_netdev *__dev_map_lookup_elem(struct bpf_map *map, u32 key); | |
6f9d451a | 964 | struct bpf_dtab_netdev *__dev_map_hash_lookup_elem(struct bpf_map *map, u32 key); |
96360004 | 965 | void __dev_map_flush(void); |
38edddb8 JDB |
966 | int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp, |
967 | struct net_device *dev_rx); | |
6d5fc195 TM |
968 | int dev_map_generic_redirect(struct bpf_dtab_netdev *dst, struct sk_buff *skb, |
969 | struct bpf_prog *xdp_prog); | |
46f55cff | 970 | |
9c270af3 | 971 | struct bpf_cpu_map_entry *__cpu_map_lookup_elem(struct bpf_map *map, u32 key); |
cdfafe98 | 972 | void __cpu_map_flush(void); |
9c270af3 JDB |
973 | int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu, struct xdp_buff *xdp, |
974 | struct net_device *dev_rx); | |
975 | ||
96eabe7a MKL |
976 | /* Return map's numa specified by userspace */ |
977 | static inline int bpf_map_attr_numa_node(const union bpf_attr *attr) | |
978 | { | |
979 | return (attr->map_flags & BPF_F_NUMA_NODE) ? | |
980 | attr->numa_node : NUMA_NO_NODE; | |
981 | } | |
982 | ||
040ee692 | 983 | struct bpf_prog *bpf_prog_get_type_path(const char *name, enum bpf_prog_type type); |
5dc4c4b7 | 984 | int array_map_alloc_check(union bpf_attr *attr); |
040ee692 | 985 | |
c695865c SF |
986 | int bpf_prog_test_run_xdp(struct bpf_prog *prog, const union bpf_attr *kattr, |
987 | union bpf_attr __user *uattr); | |
988 | int bpf_prog_test_run_skb(struct bpf_prog *prog, const union bpf_attr *kattr, | |
989 | union bpf_attr __user *uattr); | |
990 | int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog, | |
991 | const union bpf_attr *kattr, | |
992 | union bpf_attr __user *uattr); | |
9e15db66 AS |
993 | bool btf_ctx_access(int off, int size, enum bpf_access_type type, |
994 | const struct bpf_prog *prog, | |
995 | struct bpf_insn_access_aux *info); | |
996 | int btf_struct_access(struct bpf_verifier_log *log, | |
997 | const struct btf_type *t, int off, int size, | |
998 | enum bpf_access_type atype, | |
999 | u32 *next_btf_id); | |
9cc31b3a AS |
1000 | int btf_resolve_helper_id(struct bpf_verifier_log *log, |
1001 | const struct bpf_func_proto *fn, int); | |
9e15db66 | 1002 | |
fec56f58 AS |
1003 | int btf_distill_func_proto(struct bpf_verifier_log *log, |
1004 | struct btf *btf, | |
1005 | const struct btf_type *func_proto, | |
1006 | const char *func_name, | |
1007 | struct btf_func_model *m); | |
1008 | ||
8c1b6e69 AS |
1009 | int btf_check_func_arg_match(struct bpf_verifier_env *env, int subprog); |
1010 | ||
7e6897f9 BT |
1011 | struct bpf_prog *bpf_prog_by_id(u32 id); |
1012 | ||
9c270af3 | 1013 | #else /* !CONFIG_BPF_SYSCALL */ |
0fc174de DB |
1014 | static inline struct bpf_prog *bpf_prog_get(u32 ufd) |
1015 | { | |
1016 | return ERR_PTR(-EOPNOTSUPP); | |
1017 | } | |
1018 | ||
248f346f JK |
1019 | static inline struct bpf_prog *bpf_prog_get_type_dev(u32 ufd, |
1020 | enum bpf_prog_type type, | |
288b3de5 | 1021 | bool attach_drv) |
248f346f JK |
1022 | { |
1023 | return ERR_PTR(-EOPNOTSUPP); | |
1024 | } | |
1025 | ||
85192dbf | 1026 | static inline void bpf_prog_add(struct bpf_prog *prog, int i) |
cc2e0b3f | 1027 | { |
cc2e0b3f | 1028 | } |
113214be | 1029 | |
c540594f DB |
1030 | static inline void bpf_prog_sub(struct bpf_prog *prog, int i) |
1031 | { | |
1032 | } | |
1033 | ||
0fc174de DB |
1034 | static inline void bpf_prog_put(struct bpf_prog *prog) |
1035 | { | |
1036 | } | |
6d67942d | 1037 | |
85192dbf | 1038 | static inline void bpf_prog_inc(struct bpf_prog *prog) |
aa6a5f3c | 1039 | { |
aa6a5f3c | 1040 | } |
5ccb071e | 1041 | |
a6f6df69 JF |
1042 | static inline struct bpf_prog *__must_check |
1043 | bpf_prog_inc_not_zero(struct bpf_prog *prog) | |
1044 | { | |
1045 | return ERR_PTR(-EOPNOTSUPP); | |
1046 | } | |
1047 | ||
5ccb071e DB |
1048 | static inline int __bpf_prog_charge(struct user_struct *user, u32 pages) |
1049 | { | |
1050 | return 0; | |
1051 | } | |
1052 | ||
1053 | static inline void __bpf_prog_uncharge(struct user_struct *user, u32 pages) | |
1054 | { | |
1055 | } | |
46f55cff | 1056 | |
6e71b04a | 1057 | static inline int bpf_obj_get_user(const char __user *pathname, int flags) |
98589a09 SL |
1058 | { |
1059 | return -EOPNOTSUPP; | |
1060 | } | |
1061 | ||
46f55cff JF |
1062 | static inline struct net_device *__dev_map_lookup_elem(struct bpf_map *map, |
1063 | u32 key) | |
1064 | { | |
1065 | return NULL; | |
1066 | } | |
1067 | ||
6f9d451a THJ |
1068 | static inline struct net_device *__dev_map_hash_lookup_elem(struct bpf_map *map, |
1069 | u32 key) | |
1070 | { | |
1071 | return NULL; | |
1072 | } | |
1073 | ||
96360004 | 1074 | static inline void __dev_map_flush(void) |
46f55cff JF |
1075 | { |
1076 | } | |
9c270af3 | 1077 | |
67f29e07 JDB |
1078 | struct xdp_buff; |
1079 | struct bpf_dtab_netdev; | |
1080 | ||
1081 | static inline | |
38edddb8 JDB |
1082 | int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp, |
1083 | struct net_device *dev_rx) | |
67f29e07 JDB |
1084 | { |
1085 | return 0; | |
1086 | } | |
1087 | ||
6d5fc195 TM |
1088 | struct sk_buff; |
1089 | ||
1090 | static inline int dev_map_generic_redirect(struct bpf_dtab_netdev *dst, | |
1091 | struct sk_buff *skb, | |
1092 | struct bpf_prog *xdp_prog) | |
1093 | { | |
1094 | return 0; | |
1095 | } | |
1096 | ||
9c270af3 JDB |
1097 | static inline |
1098 | struct bpf_cpu_map_entry *__cpu_map_lookup_elem(struct bpf_map *map, u32 key) | |
1099 | { | |
1100 | return NULL; | |
1101 | } | |
1102 | ||
cdfafe98 | 1103 | static inline void __cpu_map_flush(void) |
9c270af3 JDB |
1104 | { |
1105 | } | |
1106 | ||
9c270af3 JDB |
1107 | static inline int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu, |
1108 | struct xdp_buff *xdp, | |
1109 | struct net_device *dev_rx) | |
1110 | { | |
1111 | return 0; | |
1112 | } | |
040ee692 AV |
1113 | |
1114 | static inline struct bpf_prog *bpf_prog_get_type_path(const char *name, | |
1115 | enum bpf_prog_type type) | |
1116 | { | |
1117 | return ERR_PTR(-EOPNOTSUPP); | |
1118 | } | |
c695865c SF |
1119 | |
1120 | static inline int bpf_prog_test_run_xdp(struct bpf_prog *prog, | |
1121 | const union bpf_attr *kattr, | |
1122 | union bpf_attr __user *uattr) | |
1123 | { | |
1124 | return -ENOTSUPP; | |
1125 | } | |
1126 | ||
1127 | static inline int bpf_prog_test_run_skb(struct bpf_prog *prog, | |
1128 | const union bpf_attr *kattr, | |
1129 | union bpf_attr __user *uattr) | |
1130 | { | |
1131 | return -ENOTSUPP; | |
1132 | } | |
1133 | ||
1134 | static inline int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog, | |
1135 | const union bpf_attr *kattr, | |
1136 | union bpf_attr __user *uattr) | |
1137 | { | |
1138 | return -ENOTSUPP; | |
1139 | } | |
6332be04 DB |
1140 | |
1141 | static inline void bpf_map_put(struct bpf_map *map) | |
1142 | { | |
1143 | } | |
7e6897f9 BT |
1144 | |
1145 | static inline struct bpf_prog *bpf_prog_by_id(u32 id) | |
1146 | { | |
1147 | return ERR_PTR(-ENOTSUPP); | |
1148 | } | |
61e021f3 | 1149 | #endif /* CONFIG_BPF_SYSCALL */ |
09756af4 | 1150 | |
479321e9 JK |
1151 | static inline struct bpf_prog *bpf_prog_get_type(u32 ufd, |
1152 | enum bpf_prog_type type) | |
1153 | { | |
1154 | return bpf_prog_get_type_dev(ufd, type, false); | |
1155 | } | |
1156 | ||
040ee692 AV |
1157 | bool bpf_prog_get_ok(struct bpf_prog *, enum bpf_prog_type *, bool); |
1158 | ||
ab3f0063 JK |
1159 | int bpf_prog_offload_compile(struct bpf_prog *prog); |
1160 | void bpf_prog_offload_destroy(struct bpf_prog *prog); | |
675fc275 JK |
1161 | int bpf_prog_offload_info_fill(struct bpf_prog_info *info, |
1162 | struct bpf_prog *prog); | |
ab3f0063 | 1163 | |
52775b33 JK |
1164 | int bpf_map_offload_info_fill(struct bpf_map_info *info, struct bpf_map *map); |
1165 | ||
a3884572 JK |
1166 | int bpf_map_offload_lookup_elem(struct bpf_map *map, void *key, void *value); |
1167 | int bpf_map_offload_update_elem(struct bpf_map *map, | |
1168 | void *key, void *value, u64 flags); | |
1169 | int bpf_map_offload_delete_elem(struct bpf_map *map, void *key); | |
1170 | int bpf_map_offload_get_next_key(struct bpf_map *map, | |
1171 | void *key, void *next_key); | |
1172 | ||
09728266 | 1173 | bool bpf_offload_prog_map_match(struct bpf_prog *prog, struct bpf_map *map); |
a3884572 | 1174 | |
1385d755 | 1175 | struct bpf_offload_dev * |
dd27c2e3 | 1176 | bpf_offload_dev_create(const struct bpf_prog_offload_ops *ops, void *priv); |
602144c2 | 1177 | void bpf_offload_dev_destroy(struct bpf_offload_dev *offdev); |
dd27c2e3 | 1178 | void *bpf_offload_dev_priv(struct bpf_offload_dev *offdev); |
602144c2 JK |
1179 | int bpf_offload_dev_netdev_register(struct bpf_offload_dev *offdev, |
1180 | struct net_device *netdev); | |
1181 | void bpf_offload_dev_netdev_unregister(struct bpf_offload_dev *offdev, | |
1182 | struct net_device *netdev); | |
fd4f227d | 1183 | bool bpf_offload_dev_match(struct bpf_prog *prog, struct net_device *netdev); |
9fd7c555 | 1184 | |
ab3f0063 JK |
1185 | #if defined(CONFIG_NET) && defined(CONFIG_BPF_SYSCALL) |
1186 | int bpf_prog_offload_init(struct bpf_prog *prog, union bpf_attr *attr); | |
1187 | ||
0d830032 | 1188 | static inline bool bpf_prog_is_dev_bound(const struct bpf_prog_aux *aux) |
ab3f0063 | 1189 | { |
9a18eedb | 1190 | return aux->offload_requested; |
ab3f0063 | 1191 | } |
a3884572 JK |
1192 | |
1193 | static inline bool bpf_map_is_dev_bound(struct bpf_map *map) | |
1194 | { | |
1195 | return unlikely(map->ops == &bpf_map_offload_ops); | |
1196 | } | |
1197 | ||
1198 | struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr); | |
1199 | void bpf_map_offload_map_free(struct bpf_map *map); | |
ab3f0063 JK |
1200 | #else |
1201 | static inline int bpf_prog_offload_init(struct bpf_prog *prog, | |
1202 | union bpf_attr *attr) | |
1203 | { | |
1204 | return -EOPNOTSUPP; | |
1205 | } | |
1206 | ||
1207 | static inline bool bpf_prog_is_dev_bound(struct bpf_prog_aux *aux) | |
1208 | { | |
1209 | return false; | |
1210 | } | |
a3884572 JK |
1211 | |
1212 | static inline bool bpf_map_is_dev_bound(struct bpf_map *map) | |
1213 | { | |
1214 | return false; | |
1215 | } | |
1216 | ||
1217 | static inline struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr) | |
1218 | { | |
1219 | return ERR_PTR(-EOPNOTSUPP); | |
1220 | } | |
1221 | ||
1222 | static inline void bpf_map_offload_map_free(struct bpf_map *map) | |
1223 | { | |
1224 | } | |
ab3f0063 JK |
1225 | #endif /* CONFIG_NET && CONFIG_BPF_SYSCALL */ |
1226 | ||
604326b4 DB |
1227 | #if defined(CONFIG_BPF_STREAM_PARSER) |
1228 | int sock_map_prog_update(struct bpf_map *map, struct bpf_prog *prog, u32 which); | |
1229 | int sock_map_get_from_fd(const union bpf_attr *attr, struct bpf_prog *prog); | |
6bdc9c4c | 1230 | #else |
604326b4 DB |
1231 | static inline int sock_map_prog_update(struct bpf_map *map, |
1232 | struct bpf_prog *prog, u32 which) | |
464bc0fd JF |
1233 | { |
1234 | return -EOPNOTSUPP; | |
1235 | } | |
fdb5c453 | 1236 | |
604326b4 DB |
1237 | static inline int sock_map_get_from_fd(const union bpf_attr *attr, |
1238 | struct bpf_prog *prog) | |
fdb5c453 SY |
1239 | { |
1240 | return -EINVAL; | |
1241 | } | |
6bdc9c4c JF |
1242 | #endif |
1243 | ||
5dc4c4b7 MKL |
1244 | #if defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL) |
1245 | void bpf_sk_reuseport_detach(struct sock *sk); | |
1246 | int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map, void *key, | |
1247 | void *value); | |
1248 | int bpf_fd_reuseport_array_update_elem(struct bpf_map *map, void *key, | |
1249 | void *value, u64 map_flags); | |
1250 | #else | |
1251 | static inline void bpf_sk_reuseport_detach(struct sock *sk) | |
1252 | { | |
1253 | } | |
1254 | ||
1255 | #ifdef CONFIG_BPF_SYSCALL | |
1256 | static inline int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map, | |
1257 | void *key, void *value) | |
1258 | { | |
1259 | return -EOPNOTSUPP; | |
1260 | } | |
1261 | ||
1262 | static inline int bpf_fd_reuseport_array_update_elem(struct bpf_map *map, | |
1263 | void *key, void *value, | |
1264 | u64 map_flags) | |
1265 | { | |
1266 | return -EOPNOTSUPP; | |
1267 | } | |
1268 | #endif /* CONFIG_BPF_SYSCALL */ | |
1269 | #endif /* defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL) */ | |
1270 | ||
d0003ec0 | 1271 | /* verifier prototypes for helper functions called from eBPF programs */ |
a2c83fff DB |
1272 | extern const struct bpf_func_proto bpf_map_lookup_elem_proto; |
1273 | extern const struct bpf_func_proto bpf_map_update_elem_proto; | |
1274 | extern const struct bpf_func_proto bpf_map_delete_elem_proto; | |
f1a2e44a MV |
1275 | extern const struct bpf_func_proto bpf_map_push_elem_proto; |
1276 | extern const struct bpf_func_proto bpf_map_pop_elem_proto; | |
1277 | extern const struct bpf_func_proto bpf_map_peek_elem_proto; | |
d0003ec0 | 1278 | |
03e69b50 | 1279 | extern const struct bpf_func_proto bpf_get_prandom_u32_proto; |
c04167ce | 1280 | extern const struct bpf_func_proto bpf_get_smp_processor_id_proto; |
2d0e30c3 | 1281 | extern const struct bpf_func_proto bpf_get_numa_node_id_proto; |
04fd61ab | 1282 | extern const struct bpf_func_proto bpf_tail_call_proto; |
17ca8cbf | 1283 | extern const struct bpf_func_proto bpf_ktime_get_ns_proto; |
ffeedafb AS |
1284 | extern const struct bpf_func_proto bpf_get_current_pid_tgid_proto; |
1285 | extern const struct bpf_func_proto bpf_get_current_uid_gid_proto; | |
1286 | extern const struct bpf_func_proto bpf_get_current_comm_proto; | |
d5a3b1f6 | 1287 | extern const struct bpf_func_proto bpf_get_stackid_proto; |
c195651e | 1288 | extern const struct bpf_func_proto bpf_get_stack_proto; |
174a79ff | 1289 | extern const struct bpf_func_proto bpf_sock_map_update_proto; |
81110384 | 1290 | extern const struct bpf_func_proto bpf_sock_hash_update_proto; |
bf6fa2c8 | 1291 | extern const struct bpf_func_proto bpf_get_current_cgroup_id_proto; |
604326b4 DB |
1292 | extern const struct bpf_func_proto bpf_msg_redirect_hash_proto; |
1293 | extern const struct bpf_func_proto bpf_msg_redirect_map_proto; | |
1294 | extern const struct bpf_func_proto bpf_sk_redirect_hash_proto; | |
1295 | extern const struct bpf_func_proto bpf_sk_redirect_map_proto; | |
d83525ca AS |
1296 | extern const struct bpf_func_proto bpf_spin_lock_proto; |
1297 | extern const struct bpf_func_proto bpf_spin_unlock_proto; | |
cd339431 | 1298 | extern const struct bpf_func_proto bpf_get_local_storage_proto; |
d7a4cb9b AI |
1299 | extern const struct bpf_func_proto bpf_strtol_proto; |
1300 | extern const struct bpf_func_proto bpf_strtoul_proto; | |
0d01da6a | 1301 | extern const struct bpf_func_proto bpf_tcp_sock_proto; |
cd339431 | 1302 | |
3ad00405 DB |
1303 | /* Shared helpers among cBPF and eBPF. */ |
1304 | void bpf_user_rnd_init_once(void); | |
1305 | u64 bpf_user_rnd_u32(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5); | |
1306 | ||
c64b7983 | 1307 | #if defined(CONFIG_NET) |
46f8bc92 MKL |
1308 | bool bpf_sock_common_is_valid_access(int off, int size, |
1309 | enum bpf_access_type type, | |
1310 | struct bpf_insn_access_aux *info); | |
c64b7983 JS |
1311 | bool bpf_sock_is_valid_access(int off, int size, enum bpf_access_type type, |
1312 | struct bpf_insn_access_aux *info); | |
1313 | u32 bpf_sock_convert_ctx_access(enum bpf_access_type type, | |
1314 | const struct bpf_insn *si, | |
1315 | struct bpf_insn *insn_buf, | |
1316 | struct bpf_prog *prog, | |
1317 | u32 *target_size); | |
1318 | #else | |
46f8bc92 MKL |
1319 | static inline bool bpf_sock_common_is_valid_access(int off, int size, |
1320 | enum bpf_access_type type, | |
1321 | struct bpf_insn_access_aux *info) | |
1322 | { | |
1323 | return false; | |
1324 | } | |
c64b7983 JS |
1325 | static inline bool bpf_sock_is_valid_access(int off, int size, |
1326 | enum bpf_access_type type, | |
1327 | struct bpf_insn_access_aux *info) | |
1328 | { | |
1329 | return false; | |
1330 | } | |
1331 | static inline u32 bpf_sock_convert_ctx_access(enum bpf_access_type type, | |
1332 | const struct bpf_insn *si, | |
1333 | struct bpf_insn *insn_buf, | |
1334 | struct bpf_prog *prog, | |
1335 | u32 *target_size) | |
1336 | { | |
1337 | return 0; | |
1338 | } | |
1339 | #endif | |
1340 | ||
655a51e5 | 1341 | #ifdef CONFIG_INET |
91cc1a99 AS |
1342 | struct sk_reuseport_kern { |
1343 | struct sk_buff *skb; | |
1344 | struct sock *sk; | |
1345 | struct sock *selected_sk; | |
1346 | void *data_end; | |
1347 | u32 hash; | |
1348 | u32 reuseport_id; | |
1349 | bool bind_inany; | |
1350 | }; | |
655a51e5 MKL |
1351 | bool bpf_tcp_sock_is_valid_access(int off, int size, enum bpf_access_type type, |
1352 | struct bpf_insn_access_aux *info); | |
1353 | ||
1354 | u32 bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type, | |
1355 | const struct bpf_insn *si, | |
1356 | struct bpf_insn *insn_buf, | |
1357 | struct bpf_prog *prog, | |
1358 | u32 *target_size); | |
7f94208c Y |
1359 | |
1360 | bool bpf_xdp_sock_is_valid_access(int off, int size, enum bpf_access_type type, | |
1361 | struct bpf_insn_access_aux *info); | |
1362 | ||
1363 | u32 bpf_xdp_sock_convert_ctx_access(enum bpf_access_type type, | |
1364 | const struct bpf_insn *si, | |
1365 | struct bpf_insn *insn_buf, | |
1366 | struct bpf_prog *prog, | |
1367 | u32 *target_size); | |
655a51e5 MKL |
1368 | #else |
1369 | static inline bool bpf_tcp_sock_is_valid_access(int off, int size, | |
1370 | enum bpf_access_type type, | |
1371 | struct bpf_insn_access_aux *info) | |
1372 | { | |
1373 | return false; | |
1374 | } | |
1375 | ||
1376 | static inline u32 bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type, | |
1377 | const struct bpf_insn *si, | |
1378 | struct bpf_insn *insn_buf, | |
1379 | struct bpf_prog *prog, | |
1380 | u32 *target_size) | |
1381 | { | |
1382 | return 0; | |
1383 | } | |
7f94208c Y |
1384 | static inline bool bpf_xdp_sock_is_valid_access(int off, int size, |
1385 | enum bpf_access_type type, | |
1386 | struct bpf_insn_access_aux *info) | |
1387 | { | |
1388 | return false; | |
1389 | } | |
1390 | ||
1391 | static inline u32 bpf_xdp_sock_convert_ctx_access(enum bpf_access_type type, | |
1392 | const struct bpf_insn *si, | |
1393 | struct bpf_insn *insn_buf, | |
1394 | struct bpf_prog *prog, | |
1395 | u32 *target_size) | |
1396 | { | |
1397 | return 0; | |
1398 | } | |
655a51e5 MKL |
1399 | #endif /* CONFIG_INET */ |
1400 | ||
5964b200 | 1401 | enum bpf_text_poke_type { |
b553a6ec DB |
1402 | BPF_MOD_CALL, |
1403 | BPF_MOD_JUMP, | |
5964b200 | 1404 | }; |
4b3da77b | 1405 | |
5964b200 AS |
1406 | int bpf_arch_text_poke(void *ip, enum bpf_text_poke_type t, |
1407 | void *addr1, void *addr2); | |
1408 | ||
99c55f7d | 1409 | #endif /* _LINUX_BPF_H */ |