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> |
ab3f0063 | 15 | #include <linux/wait.h> |
492ecee8 | 16 | #include <linux/u64_stats_sync.h> |
99c55f7d | 17 | |
cae1927c | 18 | struct bpf_verifier_env; |
3b1efb19 | 19 | struct perf_event; |
174a79ff | 20 | struct bpf_prog; |
99c55f7d | 21 | struct bpf_map; |
4f738adb | 22 | struct sock; |
a26ca7c9 | 23 | struct seq_file; |
1b2b234b | 24 | struct btf; |
e8d2bec0 | 25 | struct btf_type; |
99c55f7d | 26 | |
1b9ed84e QM |
27 | extern struct idr btf_idr; |
28 | extern spinlock_t btf_idr_lock; | |
29 | ||
99c55f7d AS |
30 | /* map is generic key/value storage optionally accesible by eBPF programs */ |
31 | struct bpf_map_ops { | |
32 | /* funcs callable from userspace (via syscall) */ | |
1110f3a9 | 33 | int (*map_alloc_check)(union bpf_attr *attr); |
99c55f7d | 34 | struct bpf_map *(*map_alloc)(union bpf_attr *attr); |
61d1b6a4 DB |
35 | void (*map_release)(struct bpf_map *map, struct file *map_file); |
36 | void (*map_free)(struct bpf_map *map); | |
db20fd2b | 37 | int (*map_get_next_key)(struct bpf_map *map, void *key, void *next_key); |
ba6b8de4 | 38 | void (*map_release_uref)(struct bpf_map *map); |
c6110222 | 39 | void *(*map_lookup_elem_sys_only)(struct bpf_map *map, void *key); |
db20fd2b AS |
40 | |
41 | /* funcs callable from userspace and from eBPF programs */ | |
42 | void *(*map_lookup_elem)(struct bpf_map *map, void *key); | |
3274f520 | 43 | int (*map_update_elem)(struct bpf_map *map, void *key, void *value, u64 flags); |
db20fd2b | 44 | int (*map_delete_elem)(struct bpf_map *map, void *key); |
f1a2e44a MV |
45 | int (*map_push_elem)(struct bpf_map *map, void *value, u64 flags); |
46 | int (*map_pop_elem)(struct bpf_map *map, void *value); | |
47 | int (*map_peek_elem)(struct bpf_map *map, void *value); | |
2a36f0b9 WN |
48 | |
49 | /* funcs called by prog_array and perf_event_array map */ | |
d056a788 DB |
50 | void *(*map_fd_get_ptr)(struct bpf_map *map, struct file *map_file, |
51 | int fd); | |
52 | void (*map_fd_put_ptr)(void *ptr); | |
81ed18ab | 53 | u32 (*map_gen_lookup)(struct bpf_map *map, struct bpf_insn *insn_buf); |
14dc6f04 | 54 | u32 (*map_fd_sys_lookup_elem)(void *ptr); |
a26ca7c9 MKL |
55 | void (*map_seq_show_elem)(struct bpf_map *map, void *key, |
56 | struct seq_file *m); | |
e8d2bec0 | 57 | int (*map_check_btf)(const struct bpf_map *map, |
1b2b234b | 58 | const struct btf *btf, |
e8d2bec0 DB |
59 | const struct btf_type *key_type, |
60 | const struct btf_type *value_type); | |
d8eca5bb DB |
61 | |
62 | /* Direct value access helpers. */ | |
63 | int (*map_direct_value_addr)(const struct bpf_map *map, | |
64 | u64 *imm, u32 off); | |
65 | int (*map_direct_value_meta)(const struct bpf_map *map, | |
66 | u64 imm, u32 *off); | |
99c55f7d AS |
67 | }; |
68 | ||
3539b96e RG |
69 | struct bpf_map_memory { |
70 | u32 pages; | |
71 | struct user_struct *user; | |
72 | }; | |
73 | ||
99c55f7d | 74 | struct bpf_map { |
a26ca7c9 | 75 | /* The first two cachelines with read-mostly members of which some |
be95a845 DB |
76 | * are also accessed in fast-path (e.g. ops, max_entries). |
77 | */ | |
78 | const struct bpf_map_ops *ops ____cacheline_aligned; | |
79 | struct bpf_map *inner_map_meta; | |
80 | #ifdef CONFIG_SECURITY | |
81 | void *security; | |
82 | #endif | |
99c55f7d AS |
83 | enum bpf_map_type map_type; |
84 | u32 key_size; | |
85 | u32 value_size; | |
86 | u32 max_entries; | |
6c905981 | 87 | u32 map_flags; |
d83525ca | 88 | int spin_lock_off; /* >=0 valid offset, <0 error */ |
f3f1c054 | 89 | u32 id; |
96eabe7a | 90 | int numa_node; |
9b2cf328 MKL |
91 | u32 btf_key_type_id; |
92 | u32 btf_value_type_id; | |
a26ca7c9 | 93 | struct btf *btf; |
3539b96e | 94 | struct bpf_map_memory memory; |
b2157399 | 95 | bool unpriv_array; |
87df15de DB |
96 | bool frozen; /* write-once */ |
97 | /* 48 bytes hole */ | |
be95a845 | 98 | |
a26ca7c9 | 99 | /* The 3rd and 4th cacheline with misc members to avoid false sharing |
be95a845 DB |
100 | * particularly with refcounting. |
101 | */ | |
3539b96e | 102 | atomic_t refcnt ____cacheline_aligned; |
c9da161c | 103 | atomic_t usercnt; |
be95a845 | 104 | struct work_struct work; |
067cae47 | 105 | char name[BPF_OBJ_NAME_LEN]; |
99c55f7d AS |
106 | }; |
107 | ||
d83525ca AS |
108 | static inline bool map_value_has_spin_lock(const struct bpf_map *map) |
109 | { | |
110 | return map->spin_lock_off >= 0; | |
111 | } | |
112 | ||
113 | static inline void check_and_init_map_lock(struct bpf_map *map, void *dst) | |
114 | { | |
115 | if (likely(!map_value_has_spin_lock(map))) | |
116 | return; | |
117 | *(struct bpf_spin_lock *)(dst + map->spin_lock_off) = | |
118 | (struct bpf_spin_lock){}; | |
119 | } | |
120 | ||
121 | /* copy everything but bpf_spin_lock */ | |
122 | static inline void copy_map_value(struct bpf_map *map, void *dst, void *src) | |
123 | { | |
124 | if (unlikely(map_value_has_spin_lock(map))) { | |
125 | u32 off = map->spin_lock_off; | |
126 | ||
127 | memcpy(dst, src, off); | |
128 | memcpy(dst + off + sizeof(struct bpf_spin_lock), | |
129 | src + off + sizeof(struct bpf_spin_lock), | |
130 | map->value_size - off - sizeof(struct bpf_spin_lock)); | |
131 | } else { | |
132 | memcpy(dst, src, map->value_size); | |
133 | } | |
134 | } | |
96049f3a AS |
135 | void copy_map_value_locked(struct bpf_map *map, void *dst, void *src, |
136 | bool lock_src); | |
d83525ca | 137 | |
602144c2 | 138 | struct bpf_offload_dev; |
a3884572 JK |
139 | struct bpf_offloaded_map; |
140 | ||
141 | struct bpf_map_dev_ops { | |
142 | int (*map_get_next_key)(struct bpf_offloaded_map *map, | |
143 | void *key, void *next_key); | |
144 | int (*map_lookup_elem)(struct bpf_offloaded_map *map, | |
145 | void *key, void *value); | |
146 | int (*map_update_elem)(struct bpf_offloaded_map *map, | |
147 | void *key, void *value, u64 flags); | |
148 | int (*map_delete_elem)(struct bpf_offloaded_map *map, void *key); | |
149 | }; | |
150 | ||
151 | struct bpf_offloaded_map { | |
152 | struct bpf_map map; | |
153 | struct net_device *netdev; | |
154 | const struct bpf_map_dev_ops *dev_ops; | |
155 | void *dev_priv; | |
156 | struct list_head offloads; | |
157 | }; | |
158 | ||
159 | static inline struct bpf_offloaded_map *map_to_offmap(struct bpf_map *map) | |
160 | { | |
161 | return container_of(map, struct bpf_offloaded_map, map); | |
162 | } | |
163 | ||
0cd3cbed JK |
164 | static inline bool bpf_map_offload_neutral(const struct bpf_map *map) |
165 | { | |
166 | return map->map_type == BPF_MAP_TYPE_PERF_EVENT_ARRAY; | |
167 | } | |
168 | ||
a26ca7c9 MKL |
169 | static inline bool bpf_map_support_seq_show(const struct bpf_map *map) |
170 | { | |
e8d2bec0 | 171 | return map->btf && map->ops->map_seq_show_elem; |
a26ca7c9 MKL |
172 | } |
173 | ||
e8d2bec0 | 174 | int map_check_no_btf(const struct bpf_map *map, |
1b2b234b | 175 | const struct btf *btf, |
e8d2bec0 DB |
176 | const struct btf_type *key_type, |
177 | const struct btf_type *value_type); | |
178 | ||
a3884572 JK |
179 | extern const struct bpf_map_ops bpf_map_offload_ops; |
180 | ||
17a52670 AS |
181 | /* function argument constraints */ |
182 | enum bpf_arg_type { | |
80f1d68c | 183 | ARG_DONTCARE = 0, /* unused argument in helper function */ |
17a52670 AS |
184 | |
185 | /* the following constraints used to prototype | |
186 | * bpf_map_lookup/update/delete_elem() functions | |
187 | */ | |
188 | ARG_CONST_MAP_PTR, /* const argument used as pointer to bpf_map */ | |
189 | ARG_PTR_TO_MAP_KEY, /* pointer to stack used as map key */ | |
190 | ARG_PTR_TO_MAP_VALUE, /* pointer to stack used as map value */ | |
2ea864c5 | 191 | ARG_PTR_TO_UNINIT_MAP_VALUE, /* pointer to valid memory used to store a map value */ |
6ac99e8f | 192 | ARG_PTR_TO_MAP_VALUE_OR_NULL, /* pointer to stack used as map value or NULL */ |
17a52670 AS |
193 | |
194 | /* the following constraints used to prototype bpf_memcmp() and other | |
195 | * functions that access data on eBPF program stack | |
196 | */ | |
39f19ebb | 197 | ARG_PTR_TO_MEM, /* pointer to valid memory (stack, packet, map value) */ |
db1ac496 | 198 | ARG_PTR_TO_MEM_OR_NULL, /* pointer to valid memory or NULL */ |
39f19ebb AS |
199 | ARG_PTR_TO_UNINIT_MEM, /* pointer to memory does not need to be initialized, |
200 | * helper function must fill all bytes or clear | |
201 | * them in error case. | |
435faee1 DB |
202 | */ |
203 | ||
39f19ebb AS |
204 | ARG_CONST_SIZE, /* number of bytes accessed from memory */ |
205 | ARG_CONST_SIZE_OR_ZERO, /* number of bytes accessed from memory or 0 */ | |
80f1d68c | 206 | |
608cd71a | 207 | ARG_PTR_TO_CTX, /* pointer to context */ |
80f1d68c | 208 | ARG_ANYTHING, /* any (initialized) argument is ok */ |
d83525ca | 209 | ARG_PTR_TO_SPIN_LOCK, /* pointer to bpf_spin_lock */ |
46f8bc92 | 210 | ARG_PTR_TO_SOCK_COMMON, /* pointer to sock_common */ |
57c3bb72 AI |
211 | ARG_PTR_TO_INT, /* pointer to int */ |
212 | ARG_PTR_TO_LONG, /* pointer to long */ | |
6ac99e8f | 213 | ARG_PTR_TO_SOCKET, /* pointer to bpf_sock (fullsock) */ |
17a52670 AS |
214 | }; |
215 | ||
216 | /* type of values returned from helper functions */ | |
217 | enum bpf_return_type { | |
218 | RET_INTEGER, /* function returns integer */ | |
219 | RET_VOID, /* function doesn't return anything */ | |
3e6a4b3e | 220 | RET_PTR_TO_MAP_VALUE, /* returns a pointer to map elem value */ |
17a52670 | 221 | RET_PTR_TO_MAP_VALUE_OR_NULL, /* returns a pointer to map elem value or NULL */ |
c64b7983 | 222 | RET_PTR_TO_SOCKET_OR_NULL, /* returns a pointer to a socket or NULL */ |
655a51e5 | 223 | RET_PTR_TO_TCP_SOCK_OR_NULL, /* returns a pointer to a tcp_sock or NULL */ |
85a51f8c | 224 | RET_PTR_TO_SOCK_COMMON_OR_NULL, /* returns a pointer to a sock_common or NULL */ |
17a52670 AS |
225 | }; |
226 | ||
09756af4 AS |
227 | /* eBPF function prototype used by verifier to allow BPF_CALLs from eBPF programs |
228 | * to in-kernel helper functions and for adjusting imm32 field in BPF_CALL | |
229 | * instructions after verifying | |
230 | */ | |
231 | struct bpf_func_proto { | |
232 | u64 (*func)(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5); | |
233 | bool gpl_only; | |
36bbef52 | 234 | bool pkt_access; |
17a52670 AS |
235 | enum bpf_return_type ret_type; |
236 | enum bpf_arg_type arg1_type; | |
237 | enum bpf_arg_type arg2_type; | |
238 | enum bpf_arg_type arg3_type; | |
239 | enum bpf_arg_type arg4_type; | |
240 | enum bpf_arg_type arg5_type; | |
241 | }; | |
242 | ||
243 | /* bpf_context is intentionally undefined structure. Pointer to bpf_context is | |
244 | * the first argument to eBPF programs. | |
245 | * For socket filters: 'struct bpf_context *' == 'struct sk_buff *' | |
246 | */ | |
247 | struct bpf_context; | |
248 | ||
249 | enum bpf_access_type { | |
250 | BPF_READ = 1, | |
251 | BPF_WRITE = 2 | |
09756af4 AS |
252 | }; |
253 | ||
19de99f7 | 254 | /* types of values stored in eBPF registers */ |
f1174f77 EC |
255 | /* Pointer types represent: |
256 | * pointer | |
257 | * pointer + imm | |
258 | * pointer + (u16) var | |
259 | * pointer + (u16) var + imm | |
260 | * if (range > 0) then [ptr, ptr + range - off) is safe to access | |
261 | * if (id > 0) means that some 'var' was added | |
262 | * if (off > 0) means that 'imm' was added | |
263 | */ | |
19de99f7 AS |
264 | enum bpf_reg_type { |
265 | NOT_INIT = 0, /* nothing was written into register */ | |
f1174f77 | 266 | SCALAR_VALUE, /* reg doesn't contain a valid pointer */ |
19de99f7 AS |
267 | PTR_TO_CTX, /* reg points to bpf_context */ |
268 | CONST_PTR_TO_MAP, /* reg points to struct bpf_map */ | |
269 | PTR_TO_MAP_VALUE, /* reg points to map element value */ | |
270 | PTR_TO_MAP_VALUE_OR_NULL,/* points to map elem value or NULL */ | |
f1174f77 | 271 | PTR_TO_STACK, /* reg == frame_pointer + offset */ |
de8f3a83 | 272 | PTR_TO_PACKET_META, /* skb->data - meta_len */ |
f1174f77 | 273 | PTR_TO_PACKET, /* reg points to skb->data */ |
19de99f7 | 274 | PTR_TO_PACKET_END, /* skb->data + headlen */ |
d58e468b | 275 | PTR_TO_FLOW_KEYS, /* reg points to bpf_flow_keys */ |
c64b7983 JS |
276 | PTR_TO_SOCKET, /* reg points to struct bpf_sock */ |
277 | PTR_TO_SOCKET_OR_NULL, /* reg points to struct bpf_sock or NULL */ | |
46f8bc92 MKL |
278 | PTR_TO_SOCK_COMMON, /* reg points to sock_common */ |
279 | PTR_TO_SOCK_COMMON_OR_NULL, /* reg points to sock_common or NULL */ | |
655a51e5 MKL |
280 | PTR_TO_TCP_SOCK, /* reg points to struct tcp_sock */ |
281 | PTR_TO_TCP_SOCK_OR_NULL, /* reg points to struct tcp_sock or NULL */ | |
9df1c28b | 282 | PTR_TO_TP_BUFFER, /* reg points to a writable raw tp's buffer */ |
fada7fdc | 283 | PTR_TO_XDP_SOCK, /* reg points to struct xdp_sock */ |
19de99f7 AS |
284 | }; |
285 | ||
23994631 YS |
286 | /* The information passed from prog-specific *_is_valid_access |
287 | * back to the verifier. | |
288 | */ | |
289 | struct bpf_insn_access_aux { | |
290 | enum bpf_reg_type reg_type; | |
291 | int ctx_field_size; | |
23994631 YS |
292 | }; |
293 | ||
f96da094 DB |
294 | static inline void |
295 | bpf_ctx_record_field_size(struct bpf_insn_access_aux *aux, u32 size) | |
296 | { | |
297 | aux->ctx_field_size = size; | |
298 | } | |
299 | ||
7de16e3a JK |
300 | struct bpf_prog_ops { |
301 | int (*test_run)(struct bpf_prog *prog, const union bpf_attr *kattr, | |
302 | union bpf_attr __user *uattr); | |
303 | }; | |
304 | ||
09756af4 AS |
305 | struct bpf_verifier_ops { |
306 | /* return eBPF function prototype for verification */ | |
5e43f899 AI |
307 | const struct bpf_func_proto * |
308 | (*get_func_proto)(enum bpf_func_id func_id, | |
309 | const struct bpf_prog *prog); | |
17a52670 AS |
310 | |
311 | /* return true if 'size' wide access at offset 'off' within bpf_context | |
312 | * with 'type' (read or write) is allowed | |
313 | */ | |
19de99f7 | 314 | bool (*is_valid_access)(int off, int size, enum bpf_access_type type, |
5e43f899 | 315 | const struct bpf_prog *prog, |
23994631 | 316 | struct bpf_insn_access_aux *info); |
36bbef52 DB |
317 | int (*gen_prologue)(struct bpf_insn *insn, bool direct_write, |
318 | const struct bpf_prog *prog); | |
e0cea7ce DB |
319 | int (*gen_ld_abs)(const struct bpf_insn *orig, |
320 | struct bpf_insn *insn_buf); | |
6b8cc1d1 DB |
321 | u32 (*convert_ctx_access)(enum bpf_access_type type, |
322 | const struct bpf_insn *src, | |
323 | struct bpf_insn *dst, | |
f96da094 | 324 | struct bpf_prog *prog, u32 *target_size); |
09756af4 AS |
325 | }; |
326 | ||
cae1927c | 327 | struct bpf_prog_offload_ops { |
08ca90af | 328 | /* verifier basic callbacks */ |
cae1927c JK |
329 | int (*insn_hook)(struct bpf_verifier_env *env, |
330 | int insn_idx, int prev_insn_idx); | |
c941ce9c | 331 | int (*finalize)(struct bpf_verifier_env *env); |
08ca90af JK |
332 | /* verifier optimization callbacks (called after .finalize) */ |
333 | int (*replace_insn)(struct bpf_verifier_env *env, u32 off, | |
334 | struct bpf_insn *insn); | |
335 | int (*remove_insns)(struct bpf_verifier_env *env, u32 off, u32 cnt); | |
336 | /* program management callbacks */ | |
16a8cb5c QM |
337 | int (*prepare)(struct bpf_prog *prog); |
338 | int (*translate)(struct bpf_prog *prog); | |
eb911947 | 339 | void (*destroy)(struct bpf_prog *prog); |
cae1927c JK |
340 | }; |
341 | ||
0a9c1991 | 342 | struct bpf_prog_offload { |
ab3f0063 JK |
343 | struct bpf_prog *prog; |
344 | struct net_device *netdev; | |
341b3e7b | 345 | struct bpf_offload_dev *offdev; |
ab3f0063 JK |
346 | void *dev_priv; |
347 | struct list_head offloads; | |
348 | bool dev_state; | |
08ca90af | 349 | bool opt_failed; |
fcfb126d JW |
350 | void *jited_image; |
351 | u32 jited_len; | |
ab3f0063 JK |
352 | }; |
353 | ||
8bad74f9 RG |
354 | enum bpf_cgroup_storage_type { |
355 | BPF_CGROUP_STORAGE_SHARED, | |
b741f163 | 356 | BPF_CGROUP_STORAGE_PERCPU, |
8bad74f9 RG |
357 | __BPF_CGROUP_STORAGE_MAX |
358 | }; | |
359 | ||
360 | #define MAX_BPF_CGROUP_STORAGE_TYPE __BPF_CGROUP_STORAGE_MAX | |
361 | ||
492ecee8 AS |
362 | struct bpf_prog_stats { |
363 | u64 cnt; | |
364 | u64 nsecs; | |
365 | struct u64_stats_sync syncp; | |
84a081f6 | 366 | } __aligned(2 * sizeof(u64)); |
492ecee8 | 367 | |
09756af4 AS |
368 | struct bpf_prog_aux { |
369 | atomic_t refcnt; | |
24701ece | 370 | u32 used_map_cnt; |
32bbe007 | 371 | u32 max_ctx_offset; |
e647815a | 372 | u32 max_pkt_offset; |
9df1c28b | 373 | u32 max_tp_access; |
8726679a | 374 | u32 stack_depth; |
dc4bb0e2 | 375 | u32 id; |
ba64e7d8 YS |
376 | u32 func_cnt; /* used by non-func prog as the number of func progs */ |
377 | u32 func_idx; /* 0 for non-func prog, the index in func array for func prog */ | |
a4b1d3c1 | 378 | bool verifier_zext; /* Zero extensions has been inserted by verifier. */ |
9a18eedb | 379 | bool offload_requested; |
1c2a088a AS |
380 | struct bpf_prog **func; |
381 | void *jit_data; /* JIT specific data. arch dependent */ | |
74451e66 DB |
382 | struct latch_tree_node ksym_tnode; |
383 | struct list_head ksym_lnode; | |
7de16e3a | 384 | const struct bpf_prog_ops *ops; |
09756af4 | 385 | struct bpf_map **used_maps; |
09756af4 | 386 | struct bpf_prog *prog; |
aaac3ba9 | 387 | struct user_struct *user; |
cb4d2b3f | 388 | u64 load_time; /* ns since boottime */ |
8bad74f9 | 389 | struct bpf_map *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE]; |
067cae47 | 390 | char name[BPF_OBJ_NAME_LEN]; |
afdb09c7 CF |
391 | #ifdef CONFIG_SECURITY |
392 | void *security; | |
393 | #endif | |
0a9c1991 | 394 | struct bpf_prog_offload *offload; |
838e9690 | 395 | struct btf *btf; |
ba64e7d8 | 396 | struct bpf_func_info *func_info; |
c454a46b MKL |
397 | /* bpf_line_info loaded from userspace. linfo->insn_off |
398 | * has the xlated insn offset. | |
399 | * Both the main and sub prog share the same linfo. | |
400 | * The subprog can access its first linfo by | |
401 | * using the linfo_idx. | |
402 | */ | |
403 | struct bpf_line_info *linfo; | |
404 | /* jited_linfo is the jited addr of the linfo. It has a | |
405 | * one to one mapping to linfo: | |
406 | * jited_linfo[i] is the jited addr for the linfo[i]->insn_off. | |
407 | * Both the main and sub prog share the same jited_linfo. | |
408 | * The subprog can access its first jited_linfo by | |
409 | * using the linfo_idx. | |
410 | */ | |
411 | void **jited_linfo; | |
ba64e7d8 | 412 | u32 func_info_cnt; |
c454a46b MKL |
413 | u32 nr_linfo; |
414 | /* subprog can use linfo_idx to access its first linfo and | |
415 | * jited_linfo. | |
416 | * main prog always has linfo_idx == 0 | |
417 | */ | |
418 | u32 linfo_idx; | |
492ecee8 | 419 | struct bpf_prog_stats __percpu *stats; |
abf2e7d6 AS |
420 | union { |
421 | struct work_struct work; | |
422 | struct rcu_head rcu; | |
423 | }; | |
09756af4 AS |
424 | }; |
425 | ||
04fd61ab AS |
426 | struct bpf_array { |
427 | struct bpf_map map; | |
428 | u32 elem_size; | |
b2157399 | 429 | u32 index_mask; |
04fd61ab AS |
430 | /* 'ownership' of prog_array is claimed by the first program that |
431 | * is going to use this map or by the first program which FD is stored | |
432 | * in the map to make sure that all callers and callees have the same | |
433 | * prog_type and JITed flag | |
434 | */ | |
435 | enum bpf_prog_type owner_prog_type; | |
436 | bool owner_jited; | |
437 | union { | |
438 | char value[0] __aligned(8); | |
2a36f0b9 | 439 | void *ptrs[0] __aligned(8); |
a10423b8 | 440 | void __percpu *pptrs[0] __aligned(8); |
04fd61ab AS |
441 | }; |
442 | }; | |
3b1efb19 | 443 | |
c04c0d2b | 444 | #define BPF_COMPLEXITY_LIMIT_INSNS 1000000 /* yes. 1M insns */ |
04fd61ab AS |
445 | #define MAX_TAIL_CALL_CNT 32 |
446 | ||
591fe988 DB |
447 | #define BPF_F_ACCESS_MASK (BPF_F_RDONLY | \ |
448 | BPF_F_RDONLY_PROG | \ | |
449 | BPF_F_WRONLY | \ | |
450 | BPF_F_WRONLY_PROG) | |
451 | ||
452 | #define BPF_MAP_CAN_READ BIT(0) | |
453 | #define BPF_MAP_CAN_WRITE BIT(1) | |
454 | ||
455 | static inline u32 bpf_map_flags_to_cap(struct bpf_map *map) | |
456 | { | |
457 | u32 access_flags = map->map_flags & (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG); | |
458 | ||
459 | /* Combination of BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG is | |
460 | * not possible. | |
461 | */ | |
462 | if (access_flags & BPF_F_RDONLY_PROG) | |
463 | return BPF_MAP_CAN_READ; | |
464 | else if (access_flags & BPF_F_WRONLY_PROG) | |
465 | return BPF_MAP_CAN_WRITE; | |
466 | else | |
467 | return BPF_MAP_CAN_READ | BPF_MAP_CAN_WRITE; | |
468 | } | |
469 | ||
470 | static inline bool bpf_map_flags_access_ok(u32 access_flags) | |
471 | { | |
472 | return (access_flags & (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG)) != | |
473 | (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG); | |
474 | } | |
475 | ||
3b1efb19 DB |
476 | struct bpf_event_entry { |
477 | struct perf_event *event; | |
478 | struct file *perf_file; | |
479 | struct file *map_file; | |
480 | struct rcu_head rcu; | |
481 | }; | |
482 | ||
04fd61ab | 483 | bool bpf_prog_array_compatible(struct bpf_array *array, const struct bpf_prog *fp); |
f1f7714e | 484 | int bpf_prog_calc_tag(struct bpf_prog *fp); |
bd570ff9 | 485 | |
0756ea3e | 486 | const struct bpf_func_proto *bpf_get_trace_printk_proto(void); |
555c8a86 DB |
487 | |
488 | typedef unsigned long (*bpf_ctx_copy_t)(void *dst, const void *src, | |
aa7145c1 | 489 | unsigned long off, unsigned long len); |
c64b7983 JS |
490 | typedef u32 (*bpf_convert_ctx_access_t)(enum bpf_access_type type, |
491 | const struct bpf_insn *src, | |
492 | struct bpf_insn *dst, | |
493 | struct bpf_prog *prog, | |
494 | u32 *target_size); | |
555c8a86 DB |
495 | |
496 | u64 bpf_event_output(struct bpf_map *map, u64 flags, void *meta, u64 meta_size, | |
497 | void *ctx, u64 ctx_size, bpf_ctx_copy_t ctx_copy); | |
04fd61ab | 498 | |
324bda9e AS |
499 | /* an array of programs to be executed under rcu_lock. |
500 | * | |
501 | * Typical usage: | |
502 | * ret = BPF_PROG_RUN_ARRAY(&bpf_prog_array, ctx, BPF_PROG_RUN); | |
503 | * | |
504 | * the structure returned by bpf_prog_array_alloc() should be populated | |
505 | * with program pointers and the last pointer must be NULL. | |
506 | * The user has to keep refcnt on the program and make sure the program | |
507 | * is removed from the array before bpf_prog_put(). | |
508 | * The 'struct bpf_prog_array *' should only be replaced with xchg() | |
509 | * since other cpus are walking the array of pointers in parallel. | |
510 | */ | |
394e40a2 RG |
511 | struct bpf_prog_array_item { |
512 | struct bpf_prog *prog; | |
8bad74f9 | 513 | struct bpf_cgroup_storage *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE]; |
394e40a2 RG |
514 | }; |
515 | ||
324bda9e AS |
516 | struct bpf_prog_array { |
517 | struct rcu_head rcu; | |
394e40a2 | 518 | struct bpf_prog_array_item items[0]; |
324bda9e AS |
519 | }; |
520 | ||
d29ab6e1 | 521 | struct bpf_prog_array *bpf_prog_array_alloc(u32 prog_cnt, gfp_t flags); |
54e9c9d4 SF |
522 | void bpf_prog_array_free(struct bpf_prog_array *progs); |
523 | int bpf_prog_array_length(struct bpf_prog_array *progs); | |
0d01da6a | 524 | bool bpf_prog_array_is_empty(struct bpf_prog_array *array); |
54e9c9d4 | 525 | int bpf_prog_array_copy_to_user(struct bpf_prog_array *progs, |
468e2f64 | 526 | __u32 __user *prog_ids, u32 cnt); |
324bda9e | 527 | |
54e9c9d4 | 528 | void bpf_prog_array_delete_safe(struct bpf_prog_array *progs, |
e87c6bc3 | 529 | struct bpf_prog *old_prog); |
54e9c9d4 | 530 | int bpf_prog_array_copy_info(struct bpf_prog_array *array, |
3a38bb98 YS |
531 | u32 *prog_ids, u32 request_cnt, |
532 | u32 *prog_cnt); | |
54e9c9d4 | 533 | int bpf_prog_array_copy(struct bpf_prog_array *old_array, |
e87c6bc3 YS |
534 | struct bpf_prog *exclude_prog, |
535 | struct bpf_prog *include_prog, | |
536 | struct bpf_prog_array **new_array); | |
537 | ||
538 | #define __BPF_PROG_RUN_ARRAY(array, ctx, func, check_non_null) \ | |
324bda9e | 539 | ({ \ |
394e40a2 RG |
540 | struct bpf_prog_array_item *_item; \ |
541 | struct bpf_prog *_prog; \ | |
e87c6bc3 | 542 | struct bpf_prog_array *_array; \ |
324bda9e | 543 | u32 _ret = 1; \ |
6899b32b | 544 | preempt_disable(); \ |
324bda9e | 545 | rcu_read_lock(); \ |
e87c6bc3 YS |
546 | _array = rcu_dereference(array); \ |
547 | if (unlikely(check_non_null && !_array))\ | |
548 | goto _out; \ | |
394e40a2 RG |
549 | _item = &_array->items[0]; \ |
550 | while ((_prog = READ_ONCE(_item->prog))) { \ | |
551 | bpf_cgroup_storage_set(_item->cgroup_storage); \ | |
552 | _ret &= func(_prog, ctx); \ | |
553 | _item++; \ | |
e87c6bc3 YS |
554 | } \ |
555 | _out: \ | |
324bda9e | 556 | rcu_read_unlock(); \ |
0edd6b64 | 557 | preempt_enable(); \ |
324bda9e AS |
558 | _ret; \ |
559 | }) | |
560 | ||
1f52f6c0 | 561 | /* To be used by __cgroup_bpf_run_filter_skb for EGRESS BPF progs |
562 | * so BPF programs can request cwr for TCP packets. | |
563 | * | |
564 | * Current cgroup skb programs can only return 0 or 1 (0 to drop the | |
565 | * packet. This macro changes the behavior so the low order bit | |
566 | * indicates whether the packet should be dropped (0) or not (1) | |
567 | * and the next bit is a congestion notification bit. This could be | |
568 | * used by TCP to call tcp_enter_cwr() | |
569 | * | |
570 | * Hence, new allowed return values of CGROUP EGRESS BPF programs are: | |
571 | * 0: drop packet | |
572 | * 1: keep packet | |
573 | * 2: drop packet and cn | |
574 | * 3: keep packet and cn | |
575 | * | |
576 | * This macro then converts it to one of the NET_XMIT or an error | |
577 | * code that is then interpreted as drop packet (and no cn): | |
578 | * 0: NET_XMIT_SUCCESS skb should be transmitted | |
579 | * 1: NET_XMIT_DROP skb should be dropped and cn | |
580 | * 2: NET_XMIT_CN skb should be transmitted and cn | |
581 | * 3: -EPERM skb should be dropped | |
582 | */ | |
583 | #define BPF_PROG_CGROUP_INET_EGRESS_RUN_ARRAY(array, ctx, func) \ | |
584 | ({ \ | |
585 | struct bpf_prog_array_item *_item; \ | |
586 | struct bpf_prog *_prog; \ | |
587 | struct bpf_prog_array *_array; \ | |
588 | u32 ret; \ | |
589 | u32 _ret = 1; \ | |
590 | u32 _cn = 0; \ | |
591 | preempt_disable(); \ | |
592 | rcu_read_lock(); \ | |
593 | _array = rcu_dereference(array); \ | |
594 | _item = &_array->items[0]; \ | |
595 | while ((_prog = READ_ONCE(_item->prog))) { \ | |
596 | bpf_cgroup_storage_set(_item->cgroup_storage); \ | |
597 | ret = func(_prog, ctx); \ | |
598 | _ret &= (ret & 1); \ | |
599 | _cn |= (ret & 2); \ | |
600 | _item++; \ | |
601 | } \ | |
602 | rcu_read_unlock(); \ | |
603 | preempt_enable(); \ | |
604 | if (_ret) \ | |
605 | _ret = (_cn ? NET_XMIT_CN : NET_XMIT_SUCCESS); \ | |
606 | else \ | |
607 | _ret = (_cn ? NET_XMIT_DROP : -EPERM); \ | |
608 | _ret; \ | |
609 | }) | |
610 | ||
e87c6bc3 YS |
611 | #define BPF_PROG_RUN_ARRAY(array, ctx, func) \ |
612 | __BPF_PROG_RUN_ARRAY(array, ctx, func, false) | |
613 | ||
614 | #define BPF_PROG_RUN_ARRAY_CHECK(array, ctx, func) \ | |
615 | __BPF_PROG_RUN_ARRAY(array, ctx, func, true) | |
616 | ||
89aa0758 | 617 | #ifdef CONFIG_BPF_SYSCALL |
b121d1e7 AS |
618 | DECLARE_PER_CPU(int, bpf_prog_active); |
619 | ||
f66e448c CF |
620 | extern const struct file_operations bpf_map_fops; |
621 | extern const struct file_operations bpf_prog_fops; | |
622 | ||
7de16e3a JK |
623 | #define BPF_PROG_TYPE(_id, _name) \ |
624 | extern const struct bpf_prog_ops _name ## _prog_ops; \ | |
625 | extern const struct bpf_verifier_ops _name ## _verifier_ops; | |
40077e0c JB |
626 | #define BPF_MAP_TYPE(_id, _ops) \ |
627 | extern const struct bpf_map_ops _ops; | |
be9370a7 JB |
628 | #include <linux/bpf_types.h> |
629 | #undef BPF_PROG_TYPE | |
40077e0c | 630 | #undef BPF_MAP_TYPE |
0fc174de | 631 | |
ab3f0063 | 632 | extern const struct bpf_prog_ops bpf_offload_prog_ops; |
4f9218aa JK |
633 | extern const struct bpf_verifier_ops tc_cls_act_analyzer_ops; |
634 | extern const struct bpf_verifier_ops xdp_analyzer_ops; | |
635 | ||
0fc174de | 636 | struct bpf_prog *bpf_prog_get(u32 ufd); |
248f346f | 637 | struct bpf_prog *bpf_prog_get_type_dev(u32 ufd, enum bpf_prog_type type, |
288b3de5 | 638 | bool attach_drv); |
6d67942d | 639 | struct bpf_prog * __must_check bpf_prog_add(struct bpf_prog *prog, int i); |
c540594f | 640 | void bpf_prog_sub(struct bpf_prog *prog, int i); |
6d67942d | 641 | struct bpf_prog * __must_check bpf_prog_inc(struct bpf_prog *prog); |
a6f6df69 | 642 | struct bpf_prog * __must_check bpf_prog_inc_not_zero(struct bpf_prog *prog); |
61e021f3 | 643 | void bpf_prog_put(struct bpf_prog *prog); |
5ccb071e DB |
644 | int __bpf_prog_charge(struct user_struct *user, u32 pages); |
645 | void __bpf_prog_uncharge(struct user_struct *user, u32 pages); | |
61e021f3 | 646 | |
ad8ad79f | 647 | void bpf_prog_free_id(struct bpf_prog *prog, bool do_idr_lock); |
a3884572 | 648 | void bpf_map_free_id(struct bpf_map *map, bool do_idr_lock); |
ad8ad79f | 649 | |
c9da161c | 650 | struct bpf_map *bpf_map_get_with_uref(u32 ufd); |
c2101297 | 651 | struct bpf_map *__bpf_map_get(struct fd f); |
6d67942d | 652 | struct bpf_map * __must_check bpf_map_inc(struct bpf_map *map, bool uref); |
b0e4701c SF |
653 | struct bpf_map * __must_check bpf_map_inc_not_zero(struct bpf_map *map, |
654 | bool uref); | |
c9da161c | 655 | void bpf_map_put_with_uref(struct bpf_map *map); |
61e021f3 | 656 | void bpf_map_put(struct bpf_map *map); |
0a4c58f5 RG |
657 | int bpf_map_charge_memlock(struct bpf_map *map, u32 pages); |
658 | void bpf_map_uncharge_memlock(struct bpf_map *map, u32 pages); | |
c85d6913 | 659 | int bpf_map_charge_init(struct bpf_map_memory *mem, size_t size); |
b936ca64 RG |
660 | void bpf_map_charge_finish(struct bpf_map_memory *mem); |
661 | void bpf_map_charge_move(struct bpf_map_memory *dst, | |
662 | struct bpf_map_memory *src); | |
96eabe7a | 663 | void *bpf_map_area_alloc(size_t size, int numa_node); |
d407bd25 | 664 | void bpf_map_area_free(void *base); |
bd475643 | 665 | void bpf_map_init_from_attr(struct bpf_map *map, union bpf_attr *attr); |
61e021f3 | 666 | |
1be7f75d AS |
667 | extern int sysctl_unprivileged_bpf_disabled; |
668 | ||
6e71b04a | 669 | int bpf_map_new_fd(struct bpf_map *map, int flags); |
b2197755 DB |
670 | int bpf_prog_new_fd(struct bpf_prog *prog); |
671 | ||
672 | int bpf_obj_pin_user(u32 ufd, const char __user *pathname); | |
6e71b04a | 673 | int bpf_obj_get_user(const char __user *pathname, int flags); |
b2197755 | 674 | |
15a07b33 AS |
675 | int bpf_percpu_hash_copy(struct bpf_map *map, void *key, void *value); |
676 | int bpf_percpu_array_copy(struct bpf_map *map, void *key, void *value); | |
677 | int bpf_percpu_hash_update(struct bpf_map *map, void *key, void *value, | |
678 | u64 flags); | |
679 | int bpf_percpu_array_update(struct bpf_map *map, void *key, void *value, | |
680 | u64 flags); | |
d056a788 | 681 | |
557c0c6e | 682 | int bpf_stackmap_copy(struct bpf_map *map, void *key, void *value); |
15a07b33 | 683 | |
d056a788 DB |
684 | int bpf_fd_array_map_update_elem(struct bpf_map *map, struct file *map_file, |
685 | void *key, void *value, u64 map_flags); | |
14dc6f04 | 686 | int bpf_fd_array_map_lookup_elem(struct bpf_map *map, void *key, u32 *value); |
bcc6b1b7 MKL |
687 | int bpf_fd_htab_map_update_elem(struct bpf_map *map, struct file *map_file, |
688 | void *key, void *value, u64 map_flags); | |
14dc6f04 | 689 | int bpf_fd_htab_map_lookup_elem(struct bpf_map *map, void *key, u32 *value); |
d056a788 | 690 | |
6e71b04a | 691 | int bpf_get_file_flag(int flags); |
dcab51f1 MKL |
692 | int bpf_check_uarg_tail_zero(void __user *uaddr, size_t expected_size, |
693 | size_t actual_size); | |
6e71b04a | 694 | |
15a07b33 AS |
695 | /* memcpy that is used with 8-byte aligned pointers, power-of-8 size and |
696 | * forced to use 'long' read/writes to try to atomically copy long counters. | |
697 | * Best-effort only. No barriers here, since it _will_ race with concurrent | |
698 | * updates from BPF programs. Called from bpf syscall and mostly used with | |
699 | * size 8 or 16 bytes, so ask compiler to inline it. | |
700 | */ | |
701 | static inline void bpf_long_memcpy(void *dst, const void *src, u32 size) | |
702 | { | |
703 | const long *lsrc = src; | |
704 | long *ldst = dst; | |
705 | ||
706 | size /= sizeof(long); | |
707 | while (size--) | |
708 | *ldst++ = *lsrc++; | |
709 | } | |
710 | ||
61e021f3 | 711 | /* verify correctness of eBPF program */ |
838e9690 YS |
712 | int bpf_check(struct bpf_prog **fp, union bpf_attr *attr, |
713 | union bpf_attr __user *uattr); | |
1ea47e01 | 714 | void bpf_patch_call_args(struct bpf_insn *insn, u32 stack_depth); |
46f55cff JF |
715 | |
716 | /* Map specifics */ | |
67f29e07 | 717 | struct xdp_buff; |
6d5fc195 | 718 | struct sk_buff; |
67f29e07 JDB |
719 | |
720 | struct bpf_dtab_netdev *__dev_map_lookup_elem(struct bpf_map *map, u32 key); | |
6f9d451a | 721 | struct bpf_dtab_netdev *__dev_map_hash_lookup_elem(struct bpf_map *map, u32 key); |
46f55cff | 722 | void __dev_map_flush(struct bpf_map *map); |
38edddb8 JDB |
723 | int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp, |
724 | struct net_device *dev_rx); | |
6d5fc195 TM |
725 | int dev_map_generic_redirect(struct bpf_dtab_netdev *dst, struct sk_buff *skb, |
726 | struct bpf_prog *xdp_prog); | |
46f55cff | 727 | |
9c270af3 | 728 | struct bpf_cpu_map_entry *__cpu_map_lookup_elem(struct bpf_map *map, u32 key); |
9c270af3 | 729 | void __cpu_map_flush(struct bpf_map *map); |
9c270af3 JDB |
730 | int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu, struct xdp_buff *xdp, |
731 | struct net_device *dev_rx); | |
732 | ||
96eabe7a MKL |
733 | /* Return map's numa specified by userspace */ |
734 | static inline int bpf_map_attr_numa_node(const union bpf_attr *attr) | |
735 | { | |
736 | return (attr->map_flags & BPF_F_NUMA_NODE) ? | |
737 | attr->numa_node : NUMA_NO_NODE; | |
738 | } | |
739 | ||
040ee692 | 740 | struct bpf_prog *bpf_prog_get_type_path(const char *name, enum bpf_prog_type type); |
5dc4c4b7 | 741 | int array_map_alloc_check(union bpf_attr *attr); |
040ee692 | 742 | |
c695865c SF |
743 | int bpf_prog_test_run_xdp(struct bpf_prog *prog, const union bpf_attr *kattr, |
744 | union bpf_attr __user *uattr); | |
745 | int bpf_prog_test_run_skb(struct bpf_prog *prog, const union bpf_attr *kattr, | |
746 | union bpf_attr __user *uattr); | |
747 | int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog, | |
748 | const union bpf_attr *kattr, | |
749 | union bpf_attr __user *uattr); | |
9c270af3 | 750 | #else /* !CONFIG_BPF_SYSCALL */ |
0fc174de DB |
751 | static inline struct bpf_prog *bpf_prog_get(u32 ufd) |
752 | { | |
753 | return ERR_PTR(-EOPNOTSUPP); | |
754 | } | |
755 | ||
248f346f JK |
756 | static inline struct bpf_prog *bpf_prog_get_type_dev(u32 ufd, |
757 | enum bpf_prog_type type, | |
288b3de5 | 758 | bool attach_drv) |
248f346f JK |
759 | { |
760 | return ERR_PTR(-EOPNOTSUPP); | |
761 | } | |
762 | ||
6d67942d DB |
763 | static inline struct bpf_prog * __must_check bpf_prog_add(struct bpf_prog *prog, |
764 | int i) | |
cc2e0b3f BB |
765 | { |
766 | return ERR_PTR(-EOPNOTSUPP); | |
767 | } | |
113214be | 768 | |
c540594f DB |
769 | static inline void bpf_prog_sub(struct bpf_prog *prog, int i) |
770 | { | |
771 | } | |
772 | ||
0fc174de DB |
773 | static inline void bpf_prog_put(struct bpf_prog *prog) |
774 | { | |
775 | } | |
6d67942d DB |
776 | |
777 | static inline struct bpf_prog * __must_check bpf_prog_inc(struct bpf_prog *prog) | |
aa6a5f3c AS |
778 | { |
779 | return ERR_PTR(-EOPNOTSUPP); | |
780 | } | |
5ccb071e | 781 | |
a6f6df69 JF |
782 | static inline struct bpf_prog *__must_check |
783 | bpf_prog_inc_not_zero(struct bpf_prog *prog) | |
784 | { | |
785 | return ERR_PTR(-EOPNOTSUPP); | |
786 | } | |
787 | ||
5ccb071e DB |
788 | static inline int __bpf_prog_charge(struct user_struct *user, u32 pages) |
789 | { | |
790 | return 0; | |
791 | } | |
792 | ||
793 | static inline void __bpf_prog_uncharge(struct user_struct *user, u32 pages) | |
794 | { | |
795 | } | |
46f55cff | 796 | |
6e71b04a | 797 | static inline int bpf_obj_get_user(const char __user *pathname, int flags) |
98589a09 SL |
798 | { |
799 | return -EOPNOTSUPP; | |
800 | } | |
801 | ||
46f55cff JF |
802 | static inline struct net_device *__dev_map_lookup_elem(struct bpf_map *map, |
803 | u32 key) | |
804 | { | |
805 | return NULL; | |
806 | } | |
807 | ||
6f9d451a THJ |
808 | static inline struct net_device *__dev_map_hash_lookup_elem(struct bpf_map *map, |
809 | u32 key) | |
810 | { | |
811 | return NULL; | |
812 | } | |
813 | ||
46f55cff JF |
814 | static inline void __dev_map_flush(struct bpf_map *map) |
815 | { | |
816 | } | |
9c270af3 | 817 | |
67f29e07 JDB |
818 | struct xdp_buff; |
819 | struct bpf_dtab_netdev; | |
820 | ||
821 | static inline | |
38edddb8 JDB |
822 | int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp, |
823 | struct net_device *dev_rx) | |
67f29e07 JDB |
824 | { |
825 | return 0; | |
826 | } | |
827 | ||
6d5fc195 TM |
828 | struct sk_buff; |
829 | ||
830 | static inline int dev_map_generic_redirect(struct bpf_dtab_netdev *dst, | |
831 | struct sk_buff *skb, | |
832 | struct bpf_prog *xdp_prog) | |
833 | { | |
834 | return 0; | |
835 | } | |
836 | ||
9c270af3 JDB |
837 | static inline |
838 | struct bpf_cpu_map_entry *__cpu_map_lookup_elem(struct bpf_map *map, u32 key) | |
839 | { | |
840 | return NULL; | |
841 | } | |
842 | ||
9c270af3 JDB |
843 | static inline void __cpu_map_flush(struct bpf_map *map) |
844 | { | |
845 | } | |
846 | ||
9c270af3 JDB |
847 | static inline int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu, |
848 | struct xdp_buff *xdp, | |
849 | struct net_device *dev_rx) | |
850 | { | |
851 | return 0; | |
852 | } | |
040ee692 AV |
853 | |
854 | static inline struct bpf_prog *bpf_prog_get_type_path(const char *name, | |
855 | enum bpf_prog_type type) | |
856 | { | |
857 | return ERR_PTR(-EOPNOTSUPP); | |
858 | } | |
c695865c SF |
859 | |
860 | static inline int bpf_prog_test_run_xdp(struct bpf_prog *prog, | |
861 | const union bpf_attr *kattr, | |
862 | union bpf_attr __user *uattr) | |
863 | { | |
864 | return -ENOTSUPP; | |
865 | } | |
866 | ||
867 | static inline int bpf_prog_test_run_skb(struct bpf_prog *prog, | |
868 | const union bpf_attr *kattr, | |
869 | union bpf_attr __user *uattr) | |
870 | { | |
871 | return -ENOTSUPP; | |
872 | } | |
873 | ||
874 | static inline int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog, | |
875 | const union bpf_attr *kattr, | |
876 | union bpf_attr __user *uattr) | |
877 | { | |
878 | return -ENOTSUPP; | |
879 | } | |
61e021f3 | 880 | #endif /* CONFIG_BPF_SYSCALL */ |
09756af4 | 881 | |
479321e9 JK |
882 | static inline struct bpf_prog *bpf_prog_get_type(u32 ufd, |
883 | enum bpf_prog_type type) | |
884 | { | |
885 | return bpf_prog_get_type_dev(ufd, type, false); | |
886 | } | |
887 | ||
040ee692 AV |
888 | bool bpf_prog_get_ok(struct bpf_prog *, enum bpf_prog_type *, bool); |
889 | ||
ab3f0063 JK |
890 | int bpf_prog_offload_compile(struct bpf_prog *prog); |
891 | void bpf_prog_offload_destroy(struct bpf_prog *prog); | |
675fc275 JK |
892 | int bpf_prog_offload_info_fill(struct bpf_prog_info *info, |
893 | struct bpf_prog *prog); | |
ab3f0063 | 894 | |
52775b33 JK |
895 | int bpf_map_offload_info_fill(struct bpf_map_info *info, struct bpf_map *map); |
896 | ||
a3884572 JK |
897 | int bpf_map_offload_lookup_elem(struct bpf_map *map, void *key, void *value); |
898 | int bpf_map_offload_update_elem(struct bpf_map *map, | |
899 | void *key, void *value, u64 flags); | |
900 | int bpf_map_offload_delete_elem(struct bpf_map *map, void *key); | |
901 | int bpf_map_offload_get_next_key(struct bpf_map *map, | |
902 | void *key, void *next_key); | |
903 | ||
09728266 | 904 | bool bpf_offload_prog_map_match(struct bpf_prog *prog, struct bpf_map *map); |
a3884572 | 905 | |
1385d755 | 906 | struct bpf_offload_dev * |
dd27c2e3 | 907 | bpf_offload_dev_create(const struct bpf_prog_offload_ops *ops, void *priv); |
602144c2 | 908 | void bpf_offload_dev_destroy(struct bpf_offload_dev *offdev); |
dd27c2e3 | 909 | void *bpf_offload_dev_priv(struct bpf_offload_dev *offdev); |
602144c2 JK |
910 | int bpf_offload_dev_netdev_register(struct bpf_offload_dev *offdev, |
911 | struct net_device *netdev); | |
912 | void bpf_offload_dev_netdev_unregister(struct bpf_offload_dev *offdev, | |
913 | struct net_device *netdev); | |
fd4f227d | 914 | bool bpf_offload_dev_match(struct bpf_prog *prog, struct net_device *netdev); |
9fd7c555 | 915 | |
ab3f0063 JK |
916 | #if defined(CONFIG_NET) && defined(CONFIG_BPF_SYSCALL) |
917 | int bpf_prog_offload_init(struct bpf_prog *prog, union bpf_attr *attr); | |
918 | ||
0d830032 | 919 | static inline bool bpf_prog_is_dev_bound(const struct bpf_prog_aux *aux) |
ab3f0063 | 920 | { |
9a18eedb | 921 | return aux->offload_requested; |
ab3f0063 | 922 | } |
a3884572 JK |
923 | |
924 | static inline bool bpf_map_is_dev_bound(struct bpf_map *map) | |
925 | { | |
926 | return unlikely(map->ops == &bpf_map_offload_ops); | |
927 | } | |
928 | ||
929 | struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr); | |
930 | void bpf_map_offload_map_free(struct bpf_map *map); | |
ab3f0063 JK |
931 | #else |
932 | static inline int bpf_prog_offload_init(struct bpf_prog *prog, | |
933 | union bpf_attr *attr) | |
934 | { | |
935 | return -EOPNOTSUPP; | |
936 | } | |
937 | ||
938 | static inline bool bpf_prog_is_dev_bound(struct bpf_prog_aux *aux) | |
939 | { | |
940 | return false; | |
941 | } | |
a3884572 JK |
942 | |
943 | static inline bool bpf_map_is_dev_bound(struct bpf_map *map) | |
944 | { | |
945 | return false; | |
946 | } | |
947 | ||
948 | static inline struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr) | |
949 | { | |
950 | return ERR_PTR(-EOPNOTSUPP); | |
951 | } | |
952 | ||
953 | static inline void bpf_map_offload_map_free(struct bpf_map *map) | |
954 | { | |
955 | } | |
ab3f0063 JK |
956 | #endif /* CONFIG_NET && CONFIG_BPF_SYSCALL */ |
957 | ||
604326b4 DB |
958 | #if defined(CONFIG_BPF_STREAM_PARSER) |
959 | int sock_map_prog_update(struct bpf_map *map, struct bpf_prog *prog, u32 which); | |
960 | int sock_map_get_from_fd(const union bpf_attr *attr, struct bpf_prog *prog); | |
6bdc9c4c | 961 | #else |
604326b4 DB |
962 | static inline int sock_map_prog_update(struct bpf_map *map, |
963 | struct bpf_prog *prog, u32 which) | |
464bc0fd JF |
964 | { |
965 | return -EOPNOTSUPP; | |
966 | } | |
fdb5c453 | 967 | |
604326b4 DB |
968 | static inline int sock_map_get_from_fd(const union bpf_attr *attr, |
969 | struct bpf_prog *prog) | |
fdb5c453 SY |
970 | { |
971 | return -EINVAL; | |
972 | } | |
6bdc9c4c JF |
973 | #endif |
974 | ||
fbfc504a BT |
975 | #if defined(CONFIG_XDP_SOCKETS) |
976 | struct xdp_sock; | |
977 | struct xdp_sock *__xsk_map_lookup_elem(struct bpf_map *map, u32 key); | |
978 | int __xsk_map_redirect(struct bpf_map *map, struct xdp_buff *xdp, | |
979 | struct xdp_sock *xs); | |
980 | void __xsk_map_flush(struct bpf_map *map); | |
981 | #else | |
982 | struct xdp_sock; | |
983 | static inline struct xdp_sock *__xsk_map_lookup_elem(struct bpf_map *map, | |
984 | u32 key) | |
985 | { | |
986 | return NULL; | |
987 | } | |
988 | ||
989 | static inline int __xsk_map_redirect(struct bpf_map *map, struct xdp_buff *xdp, | |
990 | struct xdp_sock *xs) | |
991 | { | |
992 | return -EOPNOTSUPP; | |
993 | } | |
994 | ||
995 | static inline void __xsk_map_flush(struct bpf_map *map) | |
996 | { | |
997 | } | |
998 | #endif | |
999 | ||
5dc4c4b7 MKL |
1000 | #if defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL) |
1001 | void bpf_sk_reuseport_detach(struct sock *sk); | |
1002 | int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map, void *key, | |
1003 | void *value); | |
1004 | int bpf_fd_reuseport_array_update_elem(struct bpf_map *map, void *key, | |
1005 | void *value, u64 map_flags); | |
1006 | #else | |
1007 | static inline void bpf_sk_reuseport_detach(struct sock *sk) | |
1008 | { | |
1009 | } | |
1010 | ||
1011 | #ifdef CONFIG_BPF_SYSCALL | |
1012 | static inline int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map, | |
1013 | void *key, void *value) | |
1014 | { | |
1015 | return -EOPNOTSUPP; | |
1016 | } | |
1017 | ||
1018 | static inline int bpf_fd_reuseport_array_update_elem(struct bpf_map *map, | |
1019 | void *key, void *value, | |
1020 | u64 map_flags) | |
1021 | { | |
1022 | return -EOPNOTSUPP; | |
1023 | } | |
1024 | #endif /* CONFIG_BPF_SYSCALL */ | |
1025 | #endif /* defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL) */ | |
1026 | ||
d0003ec0 | 1027 | /* verifier prototypes for helper functions called from eBPF programs */ |
a2c83fff DB |
1028 | extern const struct bpf_func_proto bpf_map_lookup_elem_proto; |
1029 | extern const struct bpf_func_proto bpf_map_update_elem_proto; | |
1030 | extern const struct bpf_func_proto bpf_map_delete_elem_proto; | |
f1a2e44a MV |
1031 | extern const struct bpf_func_proto bpf_map_push_elem_proto; |
1032 | extern const struct bpf_func_proto bpf_map_pop_elem_proto; | |
1033 | extern const struct bpf_func_proto bpf_map_peek_elem_proto; | |
d0003ec0 | 1034 | |
03e69b50 | 1035 | extern const struct bpf_func_proto bpf_get_prandom_u32_proto; |
c04167ce | 1036 | extern const struct bpf_func_proto bpf_get_smp_processor_id_proto; |
2d0e30c3 | 1037 | extern const struct bpf_func_proto bpf_get_numa_node_id_proto; |
04fd61ab | 1038 | extern const struct bpf_func_proto bpf_tail_call_proto; |
17ca8cbf | 1039 | extern const struct bpf_func_proto bpf_ktime_get_ns_proto; |
ffeedafb AS |
1040 | extern const struct bpf_func_proto bpf_get_current_pid_tgid_proto; |
1041 | extern const struct bpf_func_proto bpf_get_current_uid_gid_proto; | |
1042 | extern const struct bpf_func_proto bpf_get_current_comm_proto; | |
d5a3b1f6 | 1043 | extern const struct bpf_func_proto bpf_get_stackid_proto; |
c195651e | 1044 | extern const struct bpf_func_proto bpf_get_stack_proto; |
174a79ff | 1045 | extern const struct bpf_func_proto bpf_sock_map_update_proto; |
81110384 | 1046 | extern const struct bpf_func_proto bpf_sock_hash_update_proto; |
bf6fa2c8 | 1047 | extern const struct bpf_func_proto bpf_get_current_cgroup_id_proto; |
604326b4 DB |
1048 | extern const struct bpf_func_proto bpf_msg_redirect_hash_proto; |
1049 | extern const struct bpf_func_proto bpf_msg_redirect_map_proto; | |
1050 | extern const struct bpf_func_proto bpf_sk_redirect_hash_proto; | |
1051 | extern const struct bpf_func_proto bpf_sk_redirect_map_proto; | |
d83525ca AS |
1052 | extern const struct bpf_func_proto bpf_spin_lock_proto; |
1053 | extern const struct bpf_func_proto bpf_spin_unlock_proto; | |
cd339431 | 1054 | extern const struct bpf_func_proto bpf_get_local_storage_proto; |
d7a4cb9b AI |
1055 | extern const struct bpf_func_proto bpf_strtol_proto; |
1056 | extern const struct bpf_func_proto bpf_strtoul_proto; | |
0d01da6a | 1057 | extern const struct bpf_func_proto bpf_tcp_sock_proto; |
cd339431 | 1058 | |
3ad00405 DB |
1059 | /* Shared helpers among cBPF and eBPF. */ |
1060 | void bpf_user_rnd_init_once(void); | |
1061 | u64 bpf_user_rnd_u32(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5); | |
1062 | ||
c64b7983 | 1063 | #if defined(CONFIG_NET) |
46f8bc92 MKL |
1064 | bool bpf_sock_common_is_valid_access(int off, int size, |
1065 | enum bpf_access_type type, | |
1066 | struct bpf_insn_access_aux *info); | |
c64b7983 JS |
1067 | bool bpf_sock_is_valid_access(int off, int size, enum bpf_access_type type, |
1068 | struct bpf_insn_access_aux *info); | |
1069 | u32 bpf_sock_convert_ctx_access(enum bpf_access_type type, | |
1070 | const struct bpf_insn *si, | |
1071 | struct bpf_insn *insn_buf, | |
1072 | struct bpf_prog *prog, | |
1073 | u32 *target_size); | |
1074 | #else | |
46f8bc92 MKL |
1075 | static inline bool bpf_sock_common_is_valid_access(int off, int size, |
1076 | enum bpf_access_type type, | |
1077 | struct bpf_insn_access_aux *info) | |
1078 | { | |
1079 | return false; | |
1080 | } | |
c64b7983 JS |
1081 | static inline bool bpf_sock_is_valid_access(int off, int size, |
1082 | enum bpf_access_type type, | |
1083 | struct bpf_insn_access_aux *info) | |
1084 | { | |
1085 | return false; | |
1086 | } | |
1087 | static inline u32 bpf_sock_convert_ctx_access(enum bpf_access_type type, | |
1088 | const struct bpf_insn *si, | |
1089 | struct bpf_insn *insn_buf, | |
1090 | struct bpf_prog *prog, | |
1091 | u32 *target_size) | |
1092 | { | |
1093 | return 0; | |
1094 | } | |
1095 | #endif | |
1096 | ||
655a51e5 MKL |
1097 | #ifdef CONFIG_INET |
1098 | bool bpf_tcp_sock_is_valid_access(int off, int size, enum bpf_access_type type, | |
1099 | struct bpf_insn_access_aux *info); | |
1100 | ||
1101 | u32 bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type, | |
1102 | const struct bpf_insn *si, | |
1103 | struct bpf_insn *insn_buf, | |
1104 | struct bpf_prog *prog, | |
1105 | u32 *target_size); | |
7f94208c Y |
1106 | |
1107 | bool bpf_xdp_sock_is_valid_access(int off, int size, enum bpf_access_type type, | |
1108 | struct bpf_insn_access_aux *info); | |
1109 | ||
1110 | u32 bpf_xdp_sock_convert_ctx_access(enum bpf_access_type type, | |
1111 | const struct bpf_insn *si, | |
1112 | struct bpf_insn *insn_buf, | |
1113 | struct bpf_prog *prog, | |
1114 | u32 *target_size); | |
655a51e5 MKL |
1115 | #else |
1116 | static inline bool bpf_tcp_sock_is_valid_access(int off, int size, | |
1117 | enum bpf_access_type type, | |
1118 | struct bpf_insn_access_aux *info) | |
1119 | { | |
1120 | return false; | |
1121 | } | |
1122 | ||
1123 | static inline u32 bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type, | |
1124 | const struct bpf_insn *si, | |
1125 | struct bpf_insn *insn_buf, | |
1126 | struct bpf_prog *prog, | |
1127 | u32 *target_size) | |
1128 | { | |
1129 | return 0; | |
1130 | } | |
7f94208c Y |
1131 | static inline bool bpf_xdp_sock_is_valid_access(int off, int size, |
1132 | enum bpf_access_type type, | |
1133 | struct bpf_insn_access_aux *info) | |
1134 | { | |
1135 | return false; | |
1136 | } | |
1137 | ||
1138 | static inline u32 bpf_xdp_sock_convert_ctx_access(enum bpf_access_type type, | |
1139 | const struct bpf_insn *si, | |
1140 | struct bpf_insn *insn_buf, | |
1141 | struct bpf_prog *prog, | |
1142 | u32 *target_size) | |
1143 | { | |
1144 | return 0; | |
1145 | } | |
655a51e5 MKL |
1146 | #endif /* CONFIG_INET */ |
1147 | ||
99c55f7d | 1148 | #endif /* _LINUX_BPF_H */ |