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> | |
85d33df3 | 20 | #include <linux/module.h> |
bfea9a85 | 21 | #include <linux/kallsyms.h> |
2c78ee89 | 22 | #include <linux/capability.h> |
99c55f7d | 23 | |
cae1927c | 24 | struct bpf_verifier_env; |
9e15db66 | 25 | struct bpf_verifier_log; |
3b1efb19 | 26 | struct perf_event; |
174a79ff | 27 | struct bpf_prog; |
da765a2f | 28 | struct bpf_prog_aux; |
99c55f7d | 29 | struct bpf_map; |
4f738adb | 30 | struct sock; |
a26ca7c9 | 31 | struct seq_file; |
1b2b234b | 32 | struct btf; |
e8d2bec0 | 33 | struct btf_type; |
3dec541b | 34 | struct exception_table_entry; |
ae24345d | 35 | struct seq_operations; |
f9c79272 | 36 | struct bpf_iter_aux_info; |
f836a56e KS |
37 | struct bpf_local_storage; |
38 | struct bpf_local_storage_map; | |
36e68442 | 39 | struct kobject; |
99c55f7d | 40 | |
1b9ed84e QM |
41 | extern struct idr btf_idr; |
42 | extern spinlock_t btf_idr_lock; | |
36e68442 | 43 | extern struct kobject *btf_kobj; |
1b9ed84e | 44 | |
f9c79272 YS |
45 | typedef int (*bpf_iter_init_seq_priv_t)(void *private_data, |
46 | struct bpf_iter_aux_info *aux); | |
14fc6bd6 YS |
47 | typedef void (*bpf_iter_fini_seq_priv_t)(void *private_data); |
48 | struct bpf_iter_seq_info { | |
49 | const struct seq_operations *seq_ops; | |
50 | bpf_iter_init_seq_priv_t init_seq_private; | |
51 | bpf_iter_fini_seq_priv_t fini_seq_private; | |
52 | u32 seq_priv_size; | |
53 | }; | |
54 | ||
99c55f7d AS |
55 | /* map is generic key/value storage optionally accesible by eBPF programs */ |
56 | struct bpf_map_ops { | |
57 | /* funcs callable from userspace (via syscall) */ | |
1110f3a9 | 58 | int (*map_alloc_check)(union bpf_attr *attr); |
99c55f7d | 59 | struct bpf_map *(*map_alloc)(union bpf_attr *attr); |
61d1b6a4 DB |
60 | void (*map_release)(struct bpf_map *map, struct file *map_file); |
61 | void (*map_free)(struct bpf_map *map); | |
db20fd2b | 62 | int (*map_get_next_key)(struct bpf_map *map, void *key, void *next_key); |
ba6b8de4 | 63 | void (*map_release_uref)(struct bpf_map *map); |
c6110222 | 64 | void *(*map_lookup_elem_sys_only)(struct bpf_map *map, void *key); |
cb4d03ab BV |
65 | int (*map_lookup_batch)(struct bpf_map *map, const union bpf_attr *attr, |
66 | union bpf_attr __user *uattr); | |
05799638 YS |
67 | int (*map_lookup_and_delete_batch)(struct bpf_map *map, |
68 | const union bpf_attr *attr, | |
69 | union bpf_attr __user *uattr); | |
aa2e93b8 BV |
70 | int (*map_update_batch)(struct bpf_map *map, const union bpf_attr *attr, |
71 | union bpf_attr __user *uattr); | |
72 | int (*map_delete_batch)(struct bpf_map *map, const union bpf_attr *attr, | |
73 | union bpf_attr __user *uattr); | |
db20fd2b AS |
74 | |
75 | /* funcs callable from userspace and from eBPF programs */ | |
76 | void *(*map_lookup_elem)(struct bpf_map *map, void *key); | |
3274f520 | 77 | int (*map_update_elem)(struct bpf_map *map, void *key, void *value, u64 flags); |
db20fd2b | 78 | int (*map_delete_elem)(struct bpf_map *map, void *key); |
f1a2e44a MV |
79 | int (*map_push_elem)(struct bpf_map *map, void *value, u64 flags); |
80 | int (*map_pop_elem)(struct bpf_map *map, void *value); | |
81 | int (*map_peek_elem)(struct bpf_map *map, void *value); | |
2a36f0b9 WN |
82 | |
83 | /* funcs called by prog_array and perf_event_array map */ | |
d056a788 DB |
84 | void *(*map_fd_get_ptr)(struct bpf_map *map, struct file *map_file, |
85 | int fd); | |
86 | void (*map_fd_put_ptr)(void *ptr); | |
4a8f87e6 | 87 | int (*map_gen_lookup)(struct bpf_map *map, struct bpf_insn *insn_buf); |
14dc6f04 | 88 | u32 (*map_fd_sys_lookup_elem)(void *ptr); |
a26ca7c9 MKL |
89 | void (*map_seq_show_elem)(struct bpf_map *map, void *key, |
90 | struct seq_file *m); | |
e8d2bec0 | 91 | int (*map_check_btf)(const struct bpf_map *map, |
1b2b234b | 92 | const struct btf *btf, |
e8d2bec0 DB |
93 | const struct btf_type *key_type, |
94 | const struct btf_type *value_type); | |
d8eca5bb | 95 | |
da765a2f DB |
96 | /* Prog poke tracking helpers. */ |
97 | int (*map_poke_track)(struct bpf_map *map, struct bpf_prog_aux *aux); | |
98 | void (*map_poke_untrack)(struct bpf_map *map, struct bpf_prog_aux *aux); | |
99 | void (*map_poke_run)(struct bpf_map *map, u32 key, struct bpf_prog *old, | |
100 | struct bpf_prog *new); | |
101 | ||
d8eca5bb DB |
102 | /* Direct value access helpers. */ |
103 | int (*map_direct_value_addr)(const struct bpf_map *map, | |
104 | u64 *imm, u32 off); | |
105 | int (*map_direct_value_meta)(const struct bpf_map *map, | |
106 | u64 imm, u32 *off); | |
fc970227 | 107 | int (*map_mmap)(struct bpf_map *map, struct vm_area_struct *vma); |
457f4436 AN |
108 | __poll_t (*map_poll)(struct bpf_map *map, struct file *filp, |
109 | struct poll_table_struct *pts); | |
41c48f3a | 110 | |
f836a56e KS |
111 | /* Functions called by bpf_local_storage maps */ |
112 | int (*map_local_storage_charge)(struct bpf_local_storage_map *smap, | |
113 | void *owner, u32 size); | |
114 | void (*map_local_storage_uncharge)(struct bpf_local_storage_map *smap, | |
115 | void *owner, u32 size); | |
116 | struct bpf_local_storage __rcu ** (*map_owner_storage_ptr)(void *owner); | |
f4d05259 MKL |
117 | |
118 | /* map_meta_equal must be implemented for maps that can be | |
119 | * used as an inner map. It is a runtime check to ensure | |
120 | * an inner map can be inserted to an outer map. | |
121 | * | |
122 | * Some properties of the inner map has been used during the | |
123 | * verification time. When inserting an inner map at the runtime, | |
124 | * map_meta_equal has to ensure the inserting map has the same | |
125 | * properties that the verifier has used earlier. | |
126 | */ | |
127 | bool (*map_meta_equal)(const struct bpf_map *meta0, | |
128 | const struct bpf_map *meta1); | |
129 | ||
41c48f3a AI |
130 | /* BTF name and id of struct allocated by map_alloc */ |
131 | const char * const map_btf_name; | |
132 | int *map_btf_id; | |
a5cbe05a YS |
133 | |
134 | /* bpf_iter info used to open a seq_file */ | |
135 | const struct bpf_iter_seq_info *iter_seq_info; | |
99c55f7d AS |
136 | }; |
137 | ||
3539b96e RG |
138 | struct bpf_map_memory { |
139 | u32 pages; | |
140 | struct user_struct *user; | |
141 | }; | |
142 | ||
99c55f7d | 143 | struct bpf_map { |
a26ca7c9 | 144 | /* The first two cachelines with read-mostly members of which some |
be95a845 DB |
145 | * are also accessed in fast-path (e.g. ops, max_entries). |
146 | */ | |
147 | const struct bpf_map_ops *ops ____cacheline_aligned; | |
148 | struct bpf_map *inner_map_meta; | |
149 | #ifdef CONFIG_SECURITY | |
150 | void *security; | |
151 | #endif | |
99c55f7d AS |
152 | enum bpf_map_type map_type; |
153 | u32 key_size; | |
154 | u32 value_size; | |
155 | u32 max_entries; | |
6c905981 | 156 | u32 map_flags; |
d83525ca | 157 | int spin_lock_off; /* >=0 valid offset, <0 error */ |
f3f1c054 | 158 | u32 id; |
96eabe7a | 159 | int numa_node; |
9b2cf328 MKL |
160 | u32 btf_key_type_id; |
161 | u32 btf_value_type_id; | |
a26ca7c9 | 162 | struct btf *btf; |
3539b96e | 163 | struct bpf_map_memory memory; |
fc970227 | 164 | char name[BPF_OBJ_NAME_LEN]; |
85d33df3 | 165 | u32 btf_vmlinux_value_type_id; |
2c78ee89 | 166 | bool bypass_spec_v1; |
fc970227 AN |
167 | bool frozen; /* write-once; write-protected by freeze_mutex */ |
168 | /* 22 bytes hole */ | |
be95a845 | 169 | |
a26ca7c9 | 170 | /* The 3rd and 4th cacheline with misc members to avoid false sharing |
be95a845 DB |
171 | * particularly with refcounting. |
172 | */ | |
1e0bd5a0 AN |
173 | atomic64_t refcnt ____cacheline_aligned; |
174 | atomic64_t usercnt; | |
be95a845 | 175 | struct work_struct work; |
fc970227 AN |
176 | struct mutex freeze_mutex; |
177 | u64 writecnt; /* writable mmap cnt; protected by freeze_mutex */ | |
99c55f7d AS |
178 | }; |
179 | ||
d83525ca AS |
180 | static inline bool map_value_has_spin_lock(const struct bpf_map *map) |
181 | { | |
182 | return map->spin_lock_off >= 0; | |
183 | } | |
184 | ||
185 | static inline void check_and_init_map_lock(struct bpf_map *map, void *dst) | |
186 | { | |
187 | if (likely(!map_value_has_spin_lock(map))) | |
188 | return; | |
189 | *(struct bpf_spin_lock *)(dst + map->spin_lock_off) = | |
190 | (struct bpf_spin_lock){}; | |
191 | } | |
192 | ||
193 | /* copy everything but bpf_spin_lock */ | |
194 | static inline void copy_map_value(struct bpf_map *map, void *dst, void *src) | |
195 | { | |
196 | if (unlikely(map_value_has_spin_lock(map))) { | |
197 | u32 off = map->spin_lock_off; | |
198 | ||
199 | memcpy(dst, src, off); | |
200 | memcpy(dst + off + sizeof(struct bpf_spin_lock), | |
201 | src + off + sizeof(struct bpf_spin_lock), | |
202 | map->value_size - off - sizeof(struct bpf_spin_lock)); | |
203 | } else { | |
204 | memcpy(dst, src, map->value_size); | |
205 | } | |
206 | } | |
96049f3a AS |
207 | void copy_map_value_locked(struct bpf_map *map, void *dst, void *src, |
208 | bool lock_src); | |
8e7ae251 | 209 | int bpf_obj_name_cpy(char *dst, const char *src, unsigned int size); |
d83525ca | 210 | |
602144c2 | 211 | struct bpf_offload_dev; |
a3884572 JK |
212 | struct bpf_offloaded_map; |
213 | ||
214 | struct bpf_map_dev_ops { | |
215 | int (*map_get_next_key)(struct bpf_offloaded_map *map, | |
216 | void *key, void *next_key); | |
217 | int (*map_lookup_elem)(struct bpf_offloaded_map *map, | |
218 | void *key, void *value); | |
219 | int (*map_update_elem)(struct bpf_offloaded_map *map, | |
220 | void *key, void *value, u64 flags); | |
221 | int (*map_delete_elem)(struct bpf_offloaded_map *map, void *key); | |
222 | }; | |
223 | ||
224 | struct bpf_offloaded_map { | |
225 | struct bpf_map map; | |
226 | struct net_device *netdev; | |
227 | const struct bpf_map_dev_ops *dev_ops; | |
228 | void *dev_priv; | |
229 | struct list_head offloads; | |
230 | }; | |
231 | ||
232 | static inline struct bpf_offloaded_map *map_to_offmap(struct bpf_map *map) | |
233 | { | |
234 | return container_of(map, struct bpf_offloaded_map, map); | |
235 | } | |
236 | ||
0cd3cbed JK |
237 | static inline bool bpf_map_offload_neutral(const struct bpf_map *map) |
238 | { | |
239 | return map->map_type == BPF_MAP_TYPE_PERF_EVENT_ARRAY; | |
240 | } | |
241 | ||
a26ca7c9 MKL |
242 | static inline bool bpf_map_support_seq_show(const struct bpf_map *map) |
243 | { | |
85d33df3 MKL |
244 | return (map->btf_value_type_id || map->btf_vmlinux_value_type_id) && |
245 | map->ops->map_seq_show_elem; | |
a26ca7c9 MKL |
246 | } |
247 | ||
e8d2bec0 | 248 | int map_check_no_btf(const struct bpf_map *map, |
1b2b234b | 249 | const struct btf *btf, |
e8d2bec0 DB |
250 | const struct btf_type *key_type, |
251 | const struct btf_type *value_type); | |
252 | ||
f4d05259 MKL |
253 | bool bpf_map_meta_equal(const struct bpf_map *meta0, |
254 | const struct bpf_map *meta1); | |
255 | ||
a3884572 JK |
256 | extern const struct bpf_map_ops bpf_map_offload_ops; |
257 | ||
17a52670 AS |
258 | /* function argument constraints */ |
259 | enum bpf_arg_type { | |
80f1d68c | 260 | ARG_DONTCARE = 0, /* unused argument in helper function */ |
17a52670 AS |
261 | |
262 | /* the following constraints used to prototype | |
263 | * bpf_map_lookup/update/delete_elem() functions | |
264 | */ | |
265 | ARG_CONST_MAP_PTR, /* const argument used as pointer to bpf_map */ | |
266 | ARG_PTR_TO_MAP_KEY, /* pointer to stack used as map key */ | |
267 | ARG_PTR_TO_MAP_VALUE, /* pointer to stack used as map value */ | |
2ea864c5 | 268 | ARG_PTR_TO_UNINIT_MAP_VALUE, /* pointer to valid memory used to store a map value */ |
6ac99e8f | 269 | ARG_PTR_TO_MAP_VALUE_OR_NULL, /* pointer to stack used as map value or NULL */ |
17a52670 AS |
270 | |
271 | /* the following constraints used to prototype bpf_memcmp() and other | |
272 | * functions that access data on eBPF program stack | |
273 | */ | |
39f19ebb | 274 | ARG_PTR_TO_MEM, /* pointer to valid memory (stack, packet, map value) */ |
db1ac496 | 275 | ARG_PTR_TO_MEM_OR_NULL, /* pointer to valid memory or NULL */ |
39f19ebb AS |
276 | ARG_PTR_TO_UNINIT_MEM, /* pointer to memory does not need to be initialized, |
277 | * helper function must fill all bytes or clear | |
278 | * them in error case. | |
435faee1 DB |
279 | */ |
280 | ||
39f19ebb AS |
281 | ARG_CONST_SIZE, /* number of bytes accessed from memory */ |
282 | ARG_CONST_SIZE_OR_ZERO, /* number of bytes accessed from memory or 0 */ | |
80f1d68c | 283 | |
608cd71a | 284 | ARG_PTR_TO_CTX, /* pointer to context */ |
f318903c | 285 | ARG_PTR_TO_CTX_OR_NULL, /* pointer to context or NULL */ |
80f1d68c | 286 | ARG_ANYTHING, /* any (initialized) argument is ok */ |
d83525ca | 287 | ARG_PTR_TO_SPIN_LOCK, /* pointer to bpf_spin_lock */ |
46f8bc92 | 288 | ARG_PTR_TO_SOCK_COMMON, /* pointer to sock_common */ |
57c3bb72 AI |
289 | ARG_PTR_TO_INT, /* pointer to int */ |
290 | ARG_PTR_TO_LONG, /* pointer to long */ | |
6ac99e8f | 291 | ARG_PTR_TO_SOCKET, /* pointer to bpf_sock (fullsock) */ |
e9ddbb77 | 292 | ARG_PTR_TO_SOCKET_OR_NULL, /* pointer to bpf_sock (fullsock) or NULL */ |
a7658e1a | 293 | ARG_PTR_TO_BTF_ID, /* pointer to in-kernel struct */ |
457f4436 AN |
294 | ARG_PTR_TO_ALLOC_MEM, /* pointer to dynamically allocated memory */ |
295 | ARG_PTR_TO_ALLOC_MEM_OR_NULL, /* pointer to dynamically allocated memory or NULL */ | |
296 | ARG_CONST_ALLOC_SIZE_OR_ZERO, /* number of allocated bytes requested */ | |
1df8f55a | 297 | ARG_PTR_TO_BTF_ID_SOCK_COMMON, /* pointer to in-kernel sock_common or bpf-mirrored bpf_sock */ |
eaa6bcb7 | 298 | ARG_PTR_TO_PERCPU_BTF_ID, /* pointer to in-kernel percpu type */ |
f79e7ea5 | 299 | __BPF_ARG_TYPE_MAX, |
17a52670 AS |
300 | }; |
301 | ||
302 | /* type of values returned from helper functions */ | |
303 | enum bpf_return_type { | |
304 | RET_INTEGER, /* function returns integer */ | |
305 | RET_VOID, /* function doesn't return anything */ | |
3e6a4b3e | 306 | RET_PTR_TO_MAP_VALUE, /* returns a pointer to map elem value */ |
17a52670 | 307 | RET_PTR_TO_MAP_VALUE_OR_NULL, /* returns a pointer to map elem value or NULL */ |
c64b7983 | 308 | RET_PTR_TO_SOCKET_OR_NULL, /* returns a pointer to a socket or NULL */ |
655a51e5 | 309 | RET_PTR_TO_TCP_SOCK_OR_NULL, /* returns a pointer to a tcp_sock or NULL */ |
85a51f8c | 310 | RET_PTR_TO_SOCK_COMMON_OR_NULL, /* returns a pointer to a sock_common or NULL */ |
457f4436 | 311 | RET_PTR_TO_ALLOC_MEM_OR_NULL, /* returns a pointer to dynamically allocated memory or NULL */ |
af7ec138 | 312 | RET_PTR_TO_BTF_ID_OR_NULL, /* returns a pointer to a btf_id or NULL */ |
eaa6bcb7 | 313 | RET_PTR_TO_MEM_OR_BTF_ID_OR_NULL, /* returns a pointer to a valid memory or a btf_id or NULL */ |
63d9b80d | 314 | RET_PTR_TO_MEM_OR_BTF_ID, /* returns a pointer to a valid memory or a btf_id */ |
3ca1032a | 315 | RET_PTR_TO_BTF_ID, /* returns a pointer to a btf_id */ |
17a52670 AS |
316 | }; |
317 | ||
09756af4 AS |
318 | /* eBPF function prototype used by verifier to allow BPF_CALLs from eBPF programs |
319 | * to in-kernel helper functions and for adjusting imm32 field in BPF_CALL | |
320 | * instructions after verifying | |
321 | */ | |
322 | struct bpf_func_proto { | |
323 | u64 (*func)(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5); | |
324 | bool gpl_only; | |
36bbef52 | 325 | bool pkt_access; |
17a52670 | 326 | enum bpf_return_type ret_type; |
a7658e1a AS |
327 | union { |
328 | struct { | |
329 | enum bpf_arg_type arg1_type; | |
330 | enum bpf_arg_type arg2_type; | |
331 | enum bpf_arg_type arg3_type; | |
332 | enum bpf_arg_type arg4_type; | |
333 | enum bpf_arg_type arg5_type; | |
334 | }; | |
335 | enum bpf_arg_type arg_type[5]; | |
336 | }; | |
9436ef6e LB |
337 | union { |
338 | struct { | |
339 | u32 *arg1_btf_id; | |
340 | u32 *arg2_btf_id; | |
341 | u32 *arg3_btf_id; | |
342 | u32 *arg4_btf_id; | |
343 | u32 *arg5_btf_id; | |
344 | }; | |
345 | u32 *arg_btf_id[5]; | |
346 | }; | |
af7ec138 | 347 | int *ret_btf_id; /* return value btf_id */ |
eae2e83e | 348 | bool (*allowed)(const struct bpf_prog *prog); |
17a52670 AS |
349 | }; |
350 | ||
351 | /* bpf_context is intentionally undefined structure. Pointer to bpf_context is | |
352 | * the first argument to eBPF programs. | |
353 | * For socket filters: 'struct bpf_context *' == 'struct sk_buff *' | |
354 | */ | |
355 | struct bpf_context; | |
356 | ||
357 | enum bpf_access_type { | |
358 | BPF_READ = 1, | |
359 | BPF_WRITE = 2 | |
09756af4 AS |
360 | }; |
361 | ||
19de99f7 | 362 | /* types of values stored in eBPF registers */ |
f1174f77 EC |
363 | /* Pointer types represent: |
364 | * pointer | |
365 | * pointer + imm | |
366 | * pointer + (u16) var | |
367 | * pointer + (u16) var + imm | |
368 | * if (range > 0) then [ptr, ptr + range - off) is safe to access | |
369 | * if (id > 0) means that some 'var' was added | |
370 | * if (off > 0) means that 'imm' was added | |
371 | */ | |
19de99f7 AS |
372 | enum bpf_reg_type { |
373 | NOT_INIT = 0, /* nothing was written into register */ | |
f1174f77 | 374 | SCALAR_VALUE, /* reg doesn't contain a valid pointer */ |
19de99f7 AS |
375 | PTR_TO_CTX, /* reg points to bpf_context */ |
376 | CONST_PTR_TO_MAP, /* reg points to struct bpf_map */ | |
377 | PTR_TO_MAP_VALUE, /* reg points to map element value */ | |
378 | PTR_TO_MAP_VALUE_OR_NULL,/* points to map elem value or NULL */ | |
f1174f77 | 379 | PTR_TO_STACK, /* reg == frame_pointer + offset */ |
de8f3a83 | 380 | PTR_TO_PACKET_META, /* skb->data - meta_len */ |
f1174f77 | 381 | PTR_TO_PACKET, /* reg points to skb->data */ |
19de99f7 | 382 | PTR_TO_PACKET_END, /* skb->data + headlen */ |
d58e468b | 383 | PTR_TO_FLOW_KEYS, /* reg points to bpf_flow_keys */ |
c64b7983 JS |
384 | PTR_TO_SOCKET, /* reg points to struct bpf_sock */ |
385 | PTR_TO_SOCKET_OR_NULL, /* reg points to struct bpf_sock or NULL */ | |
46f8bc92 MKL |
386 | PTR_TO_SOCK_COMMON, /* reg points to sock_common */ |
387 | PTR_TO_SOCK_COMMON_OR_NULL, /* reg points to sock_common or NULL */ | |
655a51e5 MKL |
388 | PTR_TO_TCP_SOCK, /* reg points to struct tcp_sock */ |
389 | PTR_TO_TCP_SOCK_OR_NULL, /* reg points to struct tcp_sock or NULL */ | |
9df1c28b | 390 | PTR_TO_TP_BUFFER, /* reg points to a writable raw tp's buffer */ |
fada7fdc | 391 | PTR_TO_XDP_SOCK, /* reg points to struct xdp_sock */ |
ba5f4cfe JF |
392 | /* PTR_TO_BTF_ID points to a kernel struct that does not need |
393 | * to be null checked by the BPF program. This does not imply the | |
394 | * pointer is _not_ null and in practice this can easily be a null | |
395 | * pointer when reading pointer chains. The assumption is program | |
396 | * context will handle null pointer dereference typically via fault | |
397 | * handling. The verifier must keep this in mind and can make no | |
398 | * assumptions about null or non-null when doing branch analysis. | |
399 | * Further, when passed into helpers the helpers can not, without | |
400 | * additional context, assume the value is non-null. | |
401 | */ | |
402 | PTR_TO_BTF_ID, | |
403 | /* PTR_TO_BTF_ID_OR_NULL points to a kernel struct that has not | |
404 | * been checked for null. Used primarily to inform the verifier | |
405 | * an explicit null check is required for this struct. | |
406 | */ | |
407 | PTR_TO_BTF_ID_OR_NULL, | |
457f4436 AN |
408 | PTR_TO_MEM, /* reg points to valid memory region */ |
409 | PTR_TO_MEM_OR_NULL, /* reg points to valid memory region or NULL */ | |
afbf21dc YS |
410 | PTR_TO_RDONLY_BUF, /* reg points to a readonly buffer */ |
411 | PTR_TO_RDONLY_BUF_OR_NULL, /* reg points to a readonly buffer or NULL */ | |
412 | PTR_TO_RDWR_BUF, /* reg points to a read/write buffer */ | |
413 | PTR_TO_RDWR_BUF_OR_NULL, /* reg points to a read/write buffer or NULL */ | |
eaa6bcb7 | 414 | PTR_TO_PERCPU_BTF_ID, /* reg points to a percpu kernel variable */ |
19de99f7 AS |
415 | }; |
416 | ||
23994631 YS |
417 | /* The information passed from prog-specific *_is_valid_access |
418 | * back to the verifier. | |
419 | */ | |
420 | struct bpf_insn_access_aux { | |
421 | enum bpf_reg_type reg_type; | |
9e15db66 AS |
422 | union { |
423 | int ctx_field_size; | |
424 | u32 btf_id; | |
425 | }; | |
426 | struct bpf_verifier_log *log; /* for verbose logs */ | |
23994631 YS |
427 | }; |
428 | ||
f96da094 DB |
429 | static inline void |
430 | bpf_ctx_record_field_size(struct bpf_insn_access_aux *aux, u32 size) | |
431 | { | |
432 | aux->ctx_field_size = size; | |
433 | } | |
434 | ||
7de16e3a JK |
435 | struct bpf_prog_ops { |
436 | int (*test_run)(struct bpf_prog *prog, const union bpf_attr *kattr, | |
437 | union bpf_attr __user *uattr); | |
438 | }; | |
439 | ||
09756af4 AS |
440 | struct bpf_verifier_ops { |
441 | /* return eBPF function prototype for verification */ | |
5e43f899 AI |
442 | const struct bpf_func_proto * |
443 | (*get_func_proto)(enum bpf_func_id func_id, | |
444 | const struct bpf_prog *prog); | |
17a52670 AS |
445 | |
446 | /* return true if 'size' wide access at offset 'off' within bpf_context | |
447 | * with 'type' (read or write) is allowed | |
448 | */ | |
19de99f7 | 449 | bool (*is_valid_access)(int off, int size, enum bpf_access_type type, |
5e43f899 | 450 | const struct bpf_prog *prog, |
23994631 | 451 | struct bpf_insn_access_aux *info); |
36bbef52 DB |
452 | int (*gen_prologue)(struct bpf_insn *insn, bool direct_write, |
453 | const struct bpf_prog *prog); | |
e0cea7ce DB |
454 | int (*gen_ld_abs)(const struct bpf_insn *orig, |
455 | struct bpf_insn *insn_buf); | |
6b8cc1d1 DB |
456 | u32 (*convert_ctx_access)(enum bpf_access_type type, |
457 | const struct bpf_insn *src, | |
458 | struct bpf_insn *dst, | |
f96da094 | 459 | struct bpf_prog *prog, u32 *target_size); |
27ae7997 MKL |
460 | int (*btf_struct_access)(struct bpf_verifier_log *log, |
461 | const struct btf_type *t, int off, int size, | |
462 | enum bpf_access_type atype, | |
463 | u32 *next_btf_id); | |
09756af4 AS |
464 | }; |
465 | ||
cae1927c | 466 | struct bpf_prog_offload_ops { |
08ca90af | 467 | /* verifier basic callbacks */ |
cae1927c JK |
468 | int (*insn_hook)(struct bpf_verifier_env *env, |
469 | int insn_idx, int prev_insn_idx); | |
c941ce9c | 470 | int (*finalize)(struct bpf_verifier_env *env); |
08ca90af JK |
471 | /* verifier optimization callbacks (called after .finalize) */ |
472 | int (*replace_insn)(struct bpf_verifier_env *env, u32 off, | |
473 | struct bpf_insn *insn); | |
474 | int (*remove_insns)(struct bpf_verifier_env *env, u32 off, u32 cnt); | |
475 | /* program management callbacks */ | |
16a8cb5c QM |
476 | int (*prepare)(struct bpf_prog *prog); |
477 | int (*translate)(struct bpf_prog *prog); | |
eb911947 | 478 | void (*destroy)(struct bpf_prog *prog); |
cae1927c JK |
479 | }; |
480 | ||
0a9c1991 | 481 | struct bpf_prog_offload { |
ab3f0063 JK |
482 | struct bpf_prog *prog; |
483 | struct net_device *netdev; | |
341b3e7b | 484 | struct bpf_offload_dev *offdev; |
ab3f0063 JK |
485 | void *dev_priv; |
486 | struct list_head offloads; | |
487 | bool dev_state; | |
08ca90af | 488 | bool opt_failed; |
fcfb126d JW |
489 | void *jited_image; |
490 | u32 jited_len; | |
ab3f0063 JK |
491 | }; |
492 | ||
8bad74f9 RG |
493 | enum bpf_cgroup_storage_type { |
494 | BPF_CGROUP_STORAGE_SHARED, | |
b741f163 | 495 | BPF_CGROUP_STORAGE_PERCPU, |
8bad74f9 RG |
496 | __BPF_CGROUP_STORAGE_MAX |
497 | }; | |
498 | ||
499 | #define MAX_BPF_CGROUP_STORAGE_TYPE __BPF_CGROUP_STORAGE_MAX | |
500 | ||
f1b9509c AS |
501 | /* The longest tracepoint has 12 args. |
502 | * See include/trace/bpf_probe.h | |
503 | */ | |
504 | #define MAX_BPF_FUNC_ARGS 12 | |
505 | ||
492ecee8 AS |
506 | struct bpf_prog_stats { |
507 | u64 cnt; | |
508 | u64 nsecs; | |
509 | struct u64_stats_sync syncp; | |
84a081f6 | 510 | } __aligned(2 * sizeof(u64)); |
492ecee8 | 511 | |
fec56f58 AS |
512 | struct btf_func_model { |
513 | u8 ret_size; | |
514 | u8 nr_args; | |
515 | u8 arg_size[MAX_BPF_FUNC_ARGS]; | |
516 | }; | |
517 | ||
518 | /* Restore arguments before returning from trampoline to let original function | |
519 | * continue executing. This flag is used for fentry progs when there are no | |
520 | * fexit progs. | |
521 | */ | |
522 | #define BPF_TRAMP_F_RESTORE_REGS BIT(0) | |
523 | /* Call original function after fentry progs, but before fexit progs. | |
524 | * Makes sense for fentry/fexit, normal calls and indirect calls. | |
525 | */ | |
526 | #define BPF_TRAMP_F_CALL_ORIG BIT(1) | |
527 | /* Skip current frame and return to parent. Makes sense for fentry/fexit | |
528 | * programs only. Should not be used with normal calls and indirect calls. | |
529 | */ | |
530 | #define BPF_TRAMP_F_SKIP_FRAME BIT(2) | |
531 | ||
88fd9e53 KS |
532 | /* Each call __bpf_prog_enter + call bpf_func + call __bpf_prog_exit is ~50 |
533 | * bytes on x86. Pick a number to fit into BPF_IMAGE_SIZE / 2 | |
534 | */ | |
535 | #define BPF_MAX_TRAMP_PROGS 40 | |
536 | ||
537 | struct bpf_tramp_progs { | |
538 | struct bpf_prog *progs[BPF_MAX_TRAMP_PROGS]; | |
539 | int nr_progs; | |
540 | }; | |
541 | ||
fec56f58 AS |
542 | /* Different use cases for BPF trampoline: |
543 | * 1. replace nop at the function entry (kprobe equivalent) | |
544 | * flags = BPF_TRAMP_F_RESTORE_REGS | |
545 | * fentry = a set of programs to run before returning from trampoline | |
546 | * | |
547 | * 2. replace nop at the function entry (kprobe + kretprobe equivalent) | |
548 | * flags = BPF_TRAMP_F_CALL_ORIG | BPF_TRAMP_F_SKIP_FRAME | |
549 | * orig_call = fentry_ip + MCOUNT_INSN_SIZE | |
550 | * fentry = a set of program to run before calling original function | |
551 | * fexit = a set of program to run after original function | |
552 | * | |
553 | * 3. replace direct call instruction anywhere in the function body | |
554 | * or assign a function pointer for indirect call (like tcp_congestion_ops->cong_avoid) | |
555 | * With flags = 0 | |
556 | * fentry = a set of programs to run before returning from trampoline | |
557 | * With flags = BPF_TRAMP_F_CALL_ORIG | |
558 | * orig_call = original callback addr or direct function addr | |
559 | * fentry = a set of program to run before calling original function | |
560 | * fexit = a set of program to run after original function | |
561 | */ | |
85d33df3 MKL |
562 | int arch_prepare_bpf_trampoline(void *image, void *image_end, |
563 | const struct btf_func_model *m, u32 flags, | |
88fd9e53 | 564 | struct bpf_tramp_progs *tprogs, |
fec56f58 AS |
565 | void *orig_call); |
566 | /* these two functions are called from generated trampoline */ | |
567 | u64 notrace __bpf_prog_enter(void); | |
568 | void notrace __bpf_prog_exit(struct bpf_prog *prog, u64 start); | |
1e6c62a8 AS |
569 | void notrace __bpf_prog_enter_sleepable(void); |
570 | void notrace __bpf_prog_exit_sleepable(void); | |
fec56f58 | 571 | |
535911c8 JO |
572 | struct bpf_ksym { |
573 | unsigned long start; | |
574 | unsigned long end; | |
bfea9a85 | 575 | char name[KSYM_NAME_LEN]; |
ecb60d1c | 576 | struct list_head lnode; |
ca4424c9 | 577 | struct latch_tree_node tnode; |
cbd76f8d | 578 | bool prog; |
535911c8 JO |
579 | }; |
580 | ||
fec56f58 AS |
581 | enum bpf_tramp_prog_type { |
582 | BPF_TRAMP_FENTRY, | |
583 | BPF_TRAMP_FEXIT, | |
ae240823 | 584 | BPF_TRAMP_MODIFY_RETURN, |
be8704ff AS |
585 | BPF_TRAMP_MAX, |
586 | BPF_TRAMP_REPLACE, /* more than MAX */ | |
fec56f58 AS |
587 | }; |
588 | ||
589 | struct bpf_trampoline { | |
590 | /* hlist for trampoline_table */ | |
591 | struct hlist_node hlist; | |
592 | /* serializes access to fields of this trampoline */ | |
593 | struct mutex mutex; | |
594 | refcount_t refcnt; | |
595 | u64 key; | |
596 | struct { | |
597 | struct btf_func_model model; | |
598 | void *addr; | |
b91e014f | 599 | bool ftrace_managed; |
fec56f58 | 600 | } func; |
be8704ff AS |
601 | /* if !NULL this is BPF_PROG_TYPE_EXT program that extends another BPF |
602 | * program by replacing one of its functions. func.addr is the address | |
603 | * of the function it replaced. | |
604 | */ | |
605 | struct bpf_prog *extension_prog; | |
fec56f58 AS |
606 | /* list of BPF programs using this trampoline */ |
607 | struct hlist_head progs_hlist[BPF_TRAMP_MAX]; | |
608 | /* Number of attached programs. A counter per kind. */ | |
609 | int progs_cnt[BPF_TRAMP_MAX]; | |
610 | /* Executable image of trampoline */ | |
611 | void *image; | |
612 | u64 selector; | |
a108f7dc | 613 | struct bpf_ksym ksym; |
fec56f58 | 614 | }; |
75ccbef6 | 615 | |
f7b12b6f THJ |
616 | struct bpf_attach_target_info { |
617 | struct btf_func_model fmodel; | |
618 | long tgt_addr; | |
619 | const char *tgt_name; | |
620 | const struct btf_type *tgt_type; | |
621 | }; | |
622 | ||
116eb788 | 623 | #define BPF_DISPATCHER_MAX 48 /* Fits in 2048B */ |
75ccbef6 BT |
624 | |
625 | struct bpf_dispatcher_prog { | |
626 | struct bpf_prog *prog; | |
627 | refcount_t users; | |
628 | }; | |
629 | ||
630 | struct bpf_dispatcher { | |
631 | /* dispatcher mutex */ | |
632 | struct mutex mutex; | |
633 | void *func; | |
634 | struct bpf_dispatcher_prog progs[BPF_DISPATCHER_MAX]; | |
635 | int num_progs; | |
636 | void *image; | |
637 | u32 image_off; | |
517b75e4 | 638 | struct bpf_ksym ksym; |
75ccbef6 BT |
639 | }; |
640 | ||
6a64037d | 641 | static __always_inline unsigned int bpf_dispatcher_nop_func( |
7e6897f9 BT |
642 | const void *ctx, |
643 | const struct bpf_insn *insnsi, | |
644 | unsigned int (*bpf_func)(const void *, | |
645 | const struct bpf_insn *)) | |
646 | { | |
647 | return bpf_func(ctx, insnsi); | |
648 | } | |
fec56f58 | 649 | #ifdef CONFIG_BPF_JIT |
3aac1ead THJ |
650 | int bpf_trampoline_link_prog(struct bpf_prog *prog, struct bpf_trampoline *tr); |
651 | int bpf_trampoline_unlink_prog(struct bpf_prog *prog, struct bpf_trampoline *tr); | |
f7b12b6f THJ |
652 | struct bpf_trampoline *bpf_trampoline_get(u64 key, |
653 | struct bpf_attach_target_info *tgt_info); | |
fec56f58 | 654 | void bpf_trampoline_put(struct bpf_trampoline *tr); |
517b75e4 JO |
655 | #define BPF_DISPATCHER_INIT(_name) { \ |
656 | .mutex = __MUTEX_INITIALIZER(_name.mutex), \ | |
657 | .func = &_name##_func, \ | |
658 | .progs = {}, \ | |
659 | .num_progs = 0, \ | |
660 | .image = NULL, \ | |
661 | .image_off = 0, \ | |
662 | .ksym = { \ | |
663 | .name = #_name, \ | |
664 | .lnode = LIST_HEAD_INIT(_name.ksym.lnode), \ | |
665 | }, \ | |
75ccbef6 BT |
666 | } |
667 | ||
668 | #define DEFINE_BPF_DISPATCHER(name) \ | |
6a64037d | 669 | noinline unsigned int bpf_dispatcher_##name##_func( \ |
75ccbef6 BT |
670 | const void *ctx, \ |
671 | const struct bpf_insn *insnsi, \ | |
672 | unsigned int (*bpf_func)(const void *, \ | |
673 | const struct bpf_insn *)) \ | |
674 | { \ | |
675 | return bpf_func(ctx, insnsi); \ | |
676 | } \ | |
6a64037d BT |
677 | EXPORT_SYMBOL(bpf_dispatcher_##name##_func); \ |
678 | struct bpf_dispatcher bpf_dispatcher_##name = \ | |
679 | BPF_DISPATCHER_INIT(bpf_dispatcher_##name); | |
75ccbef6 | 680 | #define DECLARE_BPF_DISPATCHER(name) \ |
6a64037d | 681 | unsigned int bpf_dispatcher_##name##_func( \ |
75ccbef6 BT |
682 | const void *ctx, \ |
683 | const struct bpf_insn *insnsi, \ | |
684 | unsigned int (*bpf_func)(const void *, \ | |
685 | const struct bpf_insn *)); \ | |
6a64037d BT |
686 | extern struct bpf_dispatcher bpf_dispatcher_##name; |
687 | #define BPF_DISPATCHER_FUNC(name) bpf_dispatcher_##name##_func | |
688 | #define BPF_DISPATCHER_PTR(name) (&bpf_dispatcher_##name) | |
75ccbef6 BT |
689 | void bpf_dispatcher_change_prog(struct bpf_dispatcher *d, struct bpf_prog *from, |
690 | struct bpf_prog *to); | |
dba122fb | 691 | /* Called only from JIT-enabled code, so there's no need for stubs. */ |
7ac88eba | 692 | void *bpf_jit_alloc_exec_page(void); |
a108f7dc JO |
693 | void bpf_image_ksym_add(void *data, struct bpf_ksym *ksym); |
694 | void bpf_image_ksym_del(struct bpf_ksym *ksym); | |
dba122fb JO |
695 | void bpf_ksym_add(struct bpf_ksym *ksym); |
696 | void bpf_ksym_del(struct bpf_ksym *ksym); | |
fec56f58 | 697 | #else |
3aac1ead THJ |
698 | static inline int bpf_trampoline_link_prog(struct bpf_prog *prog, |
699 | struct bpf_trampoline *tr) | |
fec56f58 AS |
700 | { |
701 | return -ENOTSUPP; | |
702 | } | |
3aac1ead THJ |
703 | static inline int bpf_trampoline_unlink_prog(struct bpf_prog *prog, |
704 | struct bpf_trampoline *tr) | |
fec56f58 AS |
705 | { |
706 | return -ENOTSUPP; | |
707 | } | |
f7b12b6f THJ |
708 | static inline struct bpf_trampoline *bpf_trampoline_get(u64 key, |
709 | struct bpf_attach_target_info *tgt_info) | |
710 | { | |
711 | return ERR_PTR(-EOPNOTSUPP); | |
712 | } | |
fec56f58 | 713 | static inline void bpf_trampoline_put(struct bpf_trampoline *tr) {} |
75ccbef6 BT |
714 | #define DEFINE_BPF_DISPATCHER(name) |
715 | #define DECLARE_BPF_DISPATCHER(name) | |
6a64037d | 716 | #define BPF_DISPATCHER_FUNC(name) bpf_dispatcher_nop_func |
75ccbef6 BT |
717 | #define BPF_DISPATCHER_PTR(name) NULL |
718 | static inline void bpf_dispatcher_change_prog(struct bpf_dispatcher *d, | |
719 | struct bpf_prog *from, | |
720 | struct bpf_prog *to) {} | |
e9b4e606 JO |
721 | static inline bool is_bpf_image_address(unsigned long address) |
722 | { | |
723 | return false; | |
724 | } | |
fec56f58 AS |
725 | #endif |
726 | ||
8c1b6e69 | 727 | struct bpf_func_info_aux { |
51c39bb1 | 728 | u16 linkage; |
8c1b6e69 AS |
729 | bool unreliable; |
730 | }; | |
731 | ||
a66886fe DB |
732 | enum bpf_jit_poke_reason { |
733 | BPF_POKE_REASON_TAIL_CALL, | |
734 | }; | |
735 | ||
736 | /* Descriptor of pokes pointing /into/ the JITed image. */ | |
737 | struct bpf_jit_poke_descriptor { | |
cf71b174 | 738 | void *tailcall_target; |
ebf7d1f5 MF |
739 | void *tailcall_bypass; |
740 | void *bypass_addr; | |
a66886fe DB |
741 | union { |
742 | struct { | |
743 | struct bpf_map *map; | |
744 | u32 key; | |
745 | } tail_call; | |
746 | }; | |
cf71b174 | 747 | bool tailcall_target_stable; |
a66886fe DB |
748 | u8 adj_off; |
749 | u16 reason; | |
a748c697 | 750 | u32 insn_idx; |
a66886fe DB |
751 | }; |
752 | ||
3c32cc1b YS |
753 | /* reg_type info for ctx arguments */ |
754 | struct bpf_ctx_arg_aux { | |
755 | u32 offset; | |
756 | enum bpf_reg_type reg_type; | |
951cf368 | 757 | u32 btf_id; |
3c32cc1b YS |
758 | }; |
759 | ||
09756af4 | 760 | struct bpf_prog_aux { |
85192dbf | 761 | atomic64_t refcnt; |
24701ece | 762 | u32 used_map_cnt; |
32bbe007 | 763 | u32 max_ctx_offset; |
e647815a | 764 | u32 max_pkt_offset; |
9df1c28b | 765 | u32 max_tp_access; |
8726679a | 766 | u32 stack_depth; |
dc4bb0e2 | 767 | u32 id; |
ba64e7d8 YS |
768 | u32 func_cnt; /* used by non-func prog as the number of func progs */ |
769 | u32 func_idx; /* 0 for non-func prog, the index in func array for func prog */ | |
ccfe29eb | 770 | u32 attach_btf_id; /* in-kernel BTF type id to attach to */ |
3c32cc1b | 771 | u32 ctx_arg_info_size; |
afbf21dc YS |
772 | u32 max_rdonly_access; |
773 | u32 max_rdwr_access; | |
3c32cc1b | 774 | const struct bpf_ctx_arg_aux *ctx_arg_info; |
3aac1ead THJ |
775 | struct mutex dst_mutex; /* protects dst_* pointers below, *after* prog becomes visible */ |
776 | struct bpf_prog *dst_prog; | |
777 | struct bpf_trampoline *dst_trampoline; | |
4a1e7c0c THJ |
778 | enum bpf_prog_type saved_dst_prog_type; |
779 | enum bpf_attach_type saved_dst_attach_type; | |
a4b1d3c1 | 780 | bool verifier_zext; /* Zero extensions has been inserted by verifier. */ |
9a18eedb | 781 | bool offload_requested; |
38207291 | 782 | bool attach_btf_trace; /* true if attaching to BTF-enabled raw tp */ |
8c1b6e69 | 783 | bool func_proto_unreliable; |
1e6c62a8 | 784 | bool sleepable; |
ebf7d1f5 | 785 | bool tail_call_reachable; |
fec56f58 | 786 | enum bpf_tramp_prog_type trampoline_prog_type; |
fec56f58 | 787 | struct hlist_node tramp_hlist; |
38207291 MKL |
788 | /* BTF_KIND_FUNC_PROTO for valid attach_btf_id */ |
789 | const struct btf_type *attach_func_proto; | |
790 | /* function name for valid attach_btf_id */ | |
791 | const char *attach_func_name; | |
1c2a088a AS |
792 | struct bpf_prog **func; |
793 | void *jit_data; /* JIT specific data. arch dependent */ | |
a66886fe DB |
794 | struct bpf_jit_poke_descriptor *poke_tab; |
795 | u32 size_poke_tab; | |
535911c8 | 796 | struct bpf_ksym ksym; |
7de16e3a | 797 | const struct bpf_prog_ops *ops; |
09756af4 | 798 | struct bpf_map **used_maps; |
984fe94f | 799 | struct mutex used_maps_mutex; /* mutex for used_maps and used_map_cnt */ |
09756af4 | 800 | struct bpf_prog *prog; |
aaac3ba9 | 801 | struct user_struct *user; |
cb4d2b3f | 802 | u64 load_time; /* ns since boottime */ |
8bad74f9 | 803 | struct bpf_map *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE]; |
067cae47 | 804 | char name[BPF_OBJ_NAME_LEN]; |
afdb09c7 CF |
805 | #ifdef CONFIG_SECURITY |
806 | void *security; | |
807 | #endif | |
0a9c1991 | 808 | struct bpf_prog_offload *offload; |
838e9690 | 809 | struct btf *btf; |
ba64e7d8 | 810 | struct bpf_func_info *func_info; |
8c1b6e69 | 811 | struct bpf_func_info_aux *func_info_aux; |
c454a46b MKL |
812 | /* bpf_line_info loaded from userspace. linfo->insn_off |
813 | * has the xlated insn offset. | |
814 | * Both the main and sub prog share the same linfo. | |
815 | * The subprog can access its first linfo by | |
816 | * using the linfo_idx. | |
817 | */ | |
818 | struct bpf_line_info *linfo; | |
819 | /* jited_linfo is the jited addr of the linfo. It has a | |
820 | * one to one mapping to linfo: | |
821 | * jited_linfo[i] is the jited addr for the linfo[i]->insn_off. | |
822 | * Both the main and sub prog share the same jited_linfo. | |
823 | * The subprog can access its first jited_linfo by | |
824 | * using the linfo_idx. | |
825 | */ | |
826 | void **jited_linfo; | |
ba64e7d8 | 827 | u32 func_info_cnt; |
c454a46b MKL |
828 | u32 nr_linfo; |
829 | /* subprog can use linfo_idx to access its first linfo and | |
830 | * jited_linfo. | |
831 | * main prog always has linfo_idx == 0 | |
832 | */ | |
833 | u32 linfo_idx; | |
3dec541b AS |
834 | u32 num_exentries; |
835 | struct exception_table_entry *extable; | |
492ecee8 | 836 | struct bpf_prog_stats __percpu *stats; |
abf2e7d6 AS |
837 | union { |
838 | struct work_struct work; | |
839 | struct rcu_head rcu; | |
840 | }; | |
09756af4 AS |
841 | }; |
842 | ||
2beee5f5 DB |
843 | struct bpf_array_aux { |
844 | /* 'Ownership' of prog array is claimed by the first program that | |
845 | * is going to use this map or by the first program which FD is | |
846 | * stored in the map to make sure that all callers and callees have | |
847 | * the same prog type and JITed flag. | |
848 | */ | |
849 | enum bpf_prog_type type; | |
850 | bool jited; | |
da765a2f DB |
851 | /* Programs with direct jumps into programs part of this array. */ |
852 | struct list_head poke_progs; | |
853 | struct bpf_map *map; | |
854 | struct mutex poke_mutex; | |
855 | struct work_struct work; | |
2beee5f5 DB |
856 | }; |
857 | ||
6cc7d1e8 AN |
858 | struct bpf_link { |
859 | atomic64_t refcnt; | |
860 | u32 id; | |
861 | enum bpf_link_type type; | |
862 | const struct bpf_link_ops *ops; | |
863 | struct bpf_prog *prog; | |
864 | struct work_struct work; | |
865 | }; | |
866 | ||
867 | struct bpf_link_ops { | |
868 | void (*release)(struct bpf_link *link); | |
869 | void (*dealloc)(struct bpf_link *link); | |
73b11c2a | 870 | int (*detach)(struct bpf_link *link); |
6cc7d1e8 AN |
871 | int (*update_prog)(struct bpf_link *link, struct bpf_prog *new_prog, |
872 | struct bpf_prog *old_prog); | |
873 | void (*show_fdinfo)(const struct bpf_link *link, struct seq_file *seq); | |
874 | int (*fill_link_info)(const struct bpf_link *link, | |
875 | struct bpf_link_info *info); | |
876 | }; | |
877 | ||
878 | struct bpf_link_primer { | |
879 | struct bpf_link *link; | |
880 | struct file *file; | |
881 | int fd; | |
882 | u32 id; | |
883 | }; | |
884 | ||
85d33df3 | 885 | struct bpf_struct_ops_value; |
27ae7997 MKL |
886 | struct btf_type; |
887 | struct btf_member; | |
888 | ||
889 | #define BPF_STRUCT_OPS_MAX_NR_MEMBERS 64 | |
890 | struct bpf_struct_ops { | |
891 | const struct bpf_verifier_ops *verifier_ops; | |
892 | int (*init)(struct btf *btf); | |
893 | int (*check_member)(const struct btf_type *t, | |
894 | const struct btf_member *member); | |
85d33df3 MKL |
895 | int (*init_member)(const struct btf_type *t, |
896 | const struct btf_member *member, | |
897 | void *kdata, const void *udata); | |
898 | int (*reg)(void *kdata); | |
899 | void (*unreg)(void *kdata); | |
27ae7997 | 900 | const struct btf_type *type; |
85d33df3 | 901 | const struct btf_type *value_type; |
27ae7997 MKL |
902 | const char *name; |
903 | struct btf_func_model func_models[BPF_STRUCT_OPS_MAX_NR_MEMBERS]; | |
904 | u32 type_id; | |
85d33df3 | 905 | u32 value_id; |
27ae7997 MKL |
906 | }; |
907 | ||
908 | #if defined(CONFIG_BPF_JIT) && defined(CONFIG_BPF_SYSCALL) | |
85d33df3 | 909 | #define BPF_MODULE_OWNER ((void *)((0xeB9FUL << 2) + POISON_POINTER_DELTA)) |
27ae7997 | 910 | const struct bpf_struct_ops *bpf_struct_ops_find(u32 type_id); |
d3e42bb0 | 911 | void bpf_struct_ops_init(struct btf *btf, struct bpf_verifier_log *log); |
85d33df3 MKL |
912 | bool bpf_struct_ops_get(const void *kdata); |
913 | void bpf_struct_ops_put(const void *kdata); | |
914 | int bpf_struct_ops_map_sys_lookup_elem(struct bpf_map *map, void *key, | |
915 | void *value); | |
916 | static inline bool bpf_try_module_get(const void *data, struct module *owner) | |
917 | { | |
918 | if (owner == BPF_MODULE_OWNER) | |
919 | return bpf_struct_ops_get(data); | |
920 | else | |
921 | return try_module_get(owner); | |
922 | } | |
923 | static inline void bpf_module_put(const void *data, struct module *owner) | |
924 | { | |
925 | if (owner == BPF_MODULE_OWNER) | |
926 | bpf_struct_ops_put(data); | |
927 | else | |
928 | module_put(owner); | |
929 | } | |
27ae7997 MKL |
930 | #else |
931 | static inline const struct bpf_struct_ops *bpf_struct_ops_find(u32 type_id) | |
932 | { | |
933 | return NULL; | |
934 | } | |
d3e42bb0 MKL |
935 | static inline void bpf_struct_ops_init(struct btf *btf, |
936 | struct bpf_verifier_log *log) | |
937 | { | |
938 | } | |
85d33df3 MKL |
939 | static inline bool bpf_try_module_get(const void *data, struct module *owner) |
940 | { | |
941 | return try_module_get(owner); | |
942 | } | |
943 | static inline void bpf_module_put(const void *data, struct module *owner) | |
944 | { | |
945 | module_put(owner); | |
946 | } | |
947 | static inline int bpf_struct_ops_map_sys_lookup_elem(struct bpf_map *map, | |
948 | void *key, | |
949 | void *value) | |
950 | { | |
951 | return -EINVAL; | |
952 | } | |
27ae7997 MKL |
953 | #endif |
954 | ||
04fd61ab AS |
955 | struct bpf_array { |
956 | struct bpf_map map; | |
957 | u32 elem_size; | |
b2157399 | 958 | u32 index_mask; |
2beee5f5 | 959 | struct bpf_array_aux *aux; |
04fd61ab AS |
960 | union { |
961 | char value[0] __aligned(8); | |
2a36f0b9 | 962 | void *ptrs[0] __aligned(8); |
a10423b8 | 963 | void __percpu *pptrs[0] __aligned(8); |
04fd61ab AS |
964 | }; |
965 | }; | |
3b1efb19 | 966 | |
c04c0d2b | 967 | #define BPF_COMPLEXITY_LIMIT_INSNS 1000000 /* yes. 1M insns */ |
04fd61ab AS |
968 | #define MAX_TAIL_CALL_CNT 32 |
969 | ||
591fe988 DB |
970 | #define BPF_F_ACCESS_MASK (BPF_F_RDONLY | \ |
971 | BPF_F_RDONLY_PROG | \ | |
972 | BPF_F_WRONLY | \ | |
973 | BPF_F_WRONLY_PROG) | |
974 | ||
975 | #define BPF_MAP_CAN_READ BIT(0) | |
976 | #define BPF_MAP_CAN_WRITE BIT(1) | |
977 | ||
978 | static inline u32 bpf_map_flags_to_cap(struct bpf_map *map) | |
979 | { | |
980 | u32 access_flags = map->map_flags & (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG); | |
981 | ||
982 | /* Combination of BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG is | |
983 | * not possible. | |
984 | */ | |
985 | if (access_flags & BPF_F_RDONLY_PROG) | |
986 | return BPF_MAP_CAN_READ; | |
987 | else if (access_flags & BPF_F_WRONLY_PROG) | |
988 | return BPF_MAP_CAN_WRITE; | |
989 | else | |
990 | return BPF_MAP_CAN_READ | BPF_MAP_CAN_WRITE; | |
991 | } | |
992 | ||
993 | static inline bool bpf_map_flags_access_ok(u32 access_flags) | |
994 | { | |
995 | return (access_flags & (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG)) != | |
996 | (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG); | |
997 | } | |
998 | ||
3b1efb19 DB |
999 | struct bpf_event_entry { |
1000 | struct perf_event *event; | |
1001 | struct file *perf_file; | |
1002 | struct file *map_file; | |
1003 | struct rcu_head rcu; | |
1004 | }; | |
1005 | ||
04fd61ab | 1006 | bool bpf_prog_array_compatible(struct bpf_array *array, const struct bpf_prog *fp); |
f1f7714e | 1007 | int bpf_prog_calc_tag(struct bpf_prog *fp); |
9e15db66 | 1008 | const char *kernel_type_name(u32 btf_type_id); |
bd570ff9 | 1009 | |
0756ea3e | 1010 | const struct bpf_func_proto *bpf_get_trace_printk_proto(void); |
555c8a86 DB |
1011 | |
1012 | typedef unsigned long (*bpf_ctx_copy_t)(void *dst, const void *src, | |
aa7145c1 | 1013 | unsigned long off, unsigned long len); |
c64b7983 JS |
1014 | typedef u32 (*bpf_convert_ctx_access_t)(enum bpf_access_type type, |
1015 | const struct bpf_insn *src, | |
1016 | struct bpf_insn *dst, | |
1017 | struct bpf_prog *prog, | |
1018 | u32 *target_size); | |
555c8a86 DB |
1019 | |
1020 | u64 bpf_event_output(struct bpf_map *map, u64 flags, void *meta, u64 meta_size, | |
1021 | void *ctx, u64 ctx_size, bpf_ctx_copy_t ctx_copy); | |
04fd61ab | 1022 | |
324bda9e AS |
1023 | /* an array of programs to be executed under rcu_lock. |
1024 | * | |
1025 | * Typical usage: | |
1026 | * ret = BPF_PROG_RUN_ARRAY(&bpf_prog_array, ctx, BPF_PROG_RUN); | |
1027 | * | |
1028 | * the structure returned by bpf_prog_array_alloc() should be populated | |
1029 | * with program pointers and the last pointer must be NULL. | |
1030 | * The user has to keep refcnt on the program and make sure the program | |
1031 | * is removed from the array before bpf_prog_put(). | |
1032 | * The 'struct bpf_prog_array *' should only be replaced with xchg() | |
1033 | * since other cpus are walking the array of pointers in parallel. | |
1034 | */ | |
394e40a2 RG |
1035 | struct bpf_prog_array_item { |
1036 | struct bpf_prog *prog; | |
8bad74f9 | 1037 | struct bpf_cgroup_storage *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE]; |
394e40a2 RG |
1038 | }; |
1039 | ||
324bda9e AS |
1040 | struct bpf_prog_array { |
1041 | struct rcu_head rcu; | |
d7f10df8 | 1042 | struct bpf_prog_array_item items[]; |
324bda9e AS |
1043 | }; |
1044 | ||
d29ab6e1 | 1045 | struct bpf_prog_array *bpf_prog_array_alloc(u32 prog_cnt, gfp_t flags); |
54e9c9d4 SF |
1046 | void bpf_prog_array_free(struct bpf_prog_array *progs); |
1047 | int bpf_prog_array_length(struct bpf_prog_array *progs); | |
0d01da6a | 1048 | bool bpf_prog_array_is_empty(struct bpf_prog_array *array); |
54e9c9d4 | 1049 | int bpf_prog_array_copy_to_user(struct bpf_prog_array *progs, |
468e2f64 | 1050 | __u32 __user *prog_ids, u32 cnt); |
324bda9e | 1051 | |
54e9c9d4 | 1052 | void bpf_prog_array_delete_safe(struct bpf_prog_array *progs, |
e87c6bc3 | 1053 | struct bpf_prog *old_prog); |
ce3aa9cc JS |
1054 | int bpf_prog_array_delete_safe_at(struct bpf_prog_array *array, int index); |
1055 | int bpf_prog_array_update_at(struct bpf_prog_array *array, int index, | |
1056 | struct bpf_prog *prog); | |
54e9c9d4 | 1057 | int bpf_prog_array_copy_info(struct bpf_prog_array *array, |
3a38bb98 YS |
1058 | u32 *prog_ids, u32 request_cnt, |
1059 | u32 *prog_cnt); | |
54e9c9d4 | 1060 | int bpf_prog_array_copy(struct bpf_prog_array *old_array, |
e87c6bc3 YS |
1061 | struct bpf_prog *exclude_prog, |
1062 | struct bpf_prog *include_prog, | |
1063 | struct bpf_prog_array **new_array); | |
1064 | ||
1065 | #define __BPF_PROG_RUN_ARRAY(array, ctx, func, check_non_null) \ | |
324bda9e | 1066 | ({ \ |
394e40a2 RG |
1067 | struct bpf_prog_array_item *_item; \ |
1068 | struct bpf_prog *_prog; \ | |
e87c6bc3 | 1069 | struct bpf_prog_array *_array; \ |
324bda9e | 1070 | u32 _ret = 1; \ |
2a916f2f | 1071 | migrate_disable(); \ |
324bda9e | 1072 | rcu_read_lock(); \ |
e87c6bc3 YS |
1073 | _array = rcu_dereference(array); \ |
1074 | if (unlikely(check_non_null && !_array))\ | |
1075 | goto _out; \ | |
394e40a2 RG |
1076 | _item = &_array->items[0]; \ |
1077 | while ((_prog = READ_ONCE(_item->prog))) { \ | |
1078 | bpf_cgroup_storage_set(_item->cgroup_storage); \ | |
1079 | _ret &= func(_prog, ctx); \ | |
1080 | _item++; \ | |
e87c6bc3 YS |
1081 | } \ |
1082 | _out: \ | |
324bda9e | 1083 | rcu_read_unlock(); \ |
2a916f2f | 1084 | migrate_enable(); \ |
324bda9e AS |
1085 | _ret; \ |
1086 | }) | |
1087 | ||
1f52f6c0 | 1088 | /* To be used by __cgroup_bpf_run_filter_skb for EGRESS BPF progs |
1089 | * so BPF programs can request cwr for TCP packets. | |
1090 | * | |
1091 | * Current cgroup skb programs can only return 0 or 1 (0 to drop the | |
1092 | * packet. This macro changes the behavior so the low order bit | |
1093 | * indicates whether the packet should be dropped (0) or not (1) | |
1094 | * and the next bit is a congestion notification bit. This could be | |
1095 | * used by TCP to call tcp_enter_cwr() | |
1096 | * | |
1097 | * Hence, new allowed return values of CGROUP EGRESS BPF programs are: | |
1098 | * 0: drop packet | |
1099 | * 1: keep packet | |
1100 | * 2: drop packet and cn | |
1101 | * 3: keep packet and cn | |
1102 | * | |
1103 | * This macro then converts it to one of the NET_XMIT or an error | |
1104 | * code that is then interpreted as drop packet (and no cn): | |
1105 | * 0: NET_XMIT_SUCCESS skb should be transmitted | |
1106 | * 1: NET_XMIT_DROP skb should be dropped and cn | |
1107 | * 2: NET_XMIT_CN skb should be transmitted and cn | |
1108 | * 3: -EPERM skb should be dropped | |
1109 | */ | |
1110 | #define BPF_PROG_CGROUP_INET_EGRESS_RUN_ARRAY(array, ctx, func) \ | |
1111 | ({ \ | |
1112 | struct bpf_prog_array_item *_item; \ | |
1113 | struct bpf_prog *_prog; \ | |
1114 | struct bpf_prog_array *_array; \ | |
1115 | u32 ret; \ | |
1116 | u32 _ret = 1; \ | |
1117 | u32 _cn = 0; \ | |
2a916f2f | 1118 | migrate_disable(); \ |
1f52f6c0 | 1119 | rcu_read_lock(); \ |
1120 | _array = rcu_dereference(array); \ | |
1121 | _item = &_array->items[0]; \ | |
1122 | while ((_prog = READ_ONCE(_item->prog))) { \ | |
1123 | bpf_cgroup_storage_set(_item->cgroup_storage); \ | |
1124 | ret = func(_prog, ctx); \ | |
1125 | _ret &= (ret & 1); \ | |
1126 | _cn |= (ret & 2); \ | |
1127 | _item++; \ | |
1128 | } \ | |
1129 | rcu_read_unlock(); \ | |
2a916f2f | 1130 | migrate_enable(); \ |
1f52f6c0 | 1131 | if (_ret) \ |
1132 | _ret = (_cn ? NET_XMIT_CN : NET_XMIT_SUCCESS); \ | |
1133 | else \ | |
1134 | _ret = (_cn ? NET_XMIT_DROP : -EPERM); \ | |
1135 | _ret; \ | |
1136 | }) | |
1137 | ||
e87c6bc3 YS |
1138 | #define BPF_PROG_RUN_ARRAY(array, ctx, func) \ |
1139 | __BPF_PROG_RUN_ARRAY(array, ctx, func, false) | |
1140 | ||
1141 | #define BPF_PROG_RUN_ARRAY_CHECK(array, ctx, func) \ | |
1142 | __BPF_PROG_RUN_ARRAY(array, ctx, func, true) | |
1143 | ||
89aa0758 | 1144 | #ifdef CONFIG_BPF_SYSCALL |
b121d1e7 | 1145 | DECLARE_PER_CPU(int, bpf_prog_active); |
d46edd67 | 1146 | extern struct mutex bpf_stats_enabled_mutex; |
b121d1e7 | 1147 | |
c518cfa0 TG |
1148 | /* |
1149 | * Block execution of BPF programs attached to instrumentation (perf, | |
1150 | * kprobes, tracepoints) to prevent deadlocks on map operations as any of | |
1151 | * these events can happen inside a region which holds a map bucket lock | |
1152 | * and can deadlock on it. | |
1153 | * | |
1154 | * Use the preemption safe inc/dec variants on RT because migrate disable | |
1155 | * is preemptible on RT and preemption in the middle of the RMW operation | |
1156 | * might lead to inconsistent state. Use the raw variants for non RT | |
1157 | * kernels as migrate_disable() maps to preempt_disable() so the slightly | |
1158 | * more expensive save operation can be avoided. | |
1159 | */ | |
1160 | static inline void bpf_disable_instrumentation(void) | |
1161 | { | |
1162 | migrate_disable(); | |
1163 | if (IS_ENABLED(CONFIG_PREEMPT_RT)) | |
1164 | this_cpu_inc(bpf_prog_active); | |
1165 | else | |
1166 | __this_cpu_inc(bpf_prog_active); | |
1167 | } | |
1168 | ||
1169 | static inline void bpf_enable_instrumentation(void) | |
1170 | { | |
1171 | if (IS_ENABLED(CONFIG_PREEMPT_RT)) | |
1172 | this_cpu_dec(bpf_prog_active); | |
1173 | else | |
1174 | __this_cpu_dec(bpf_prog_active); | |
1175 | migrate_enable(); | |
1176 | } | |
1177 | ||
f66e448c CF |
1178 | extern const struct file_operations bpf_map_fops; |
1179 | extern const struct file_operations bpf_prog_fops; | |
367ec3e4 | 1180 | extern const struct file_operations bpf_iter_fops; |
f66e448c | 1181 | |
91cc1a99 | 1182 | #define BPF_PROG_TYPE(_id, _name, prog_ctx_type, kern_ctx_type) \ |
7de16e3a JK |
1183 | extern const struct bpf_prog_ops _name ## _prog_ops; \ |
1184 | extern const struct bpf_verifier_ops _name ## _verifier_ops; | |
40077e0c JB |
1185 | #define BPF_MAP_TYPE(_id, _ops) \ |
1186 | extern const struct bpf_map_ops _ops; | |
f2e10bff | 1187 | #define BPF_LINK_TYPE(_id, _name) |
be9370a7 JB |
1188 | #include <linux/bpf_types.h> |
1189 | #undef BPF_PROG_TYPE | |
40077e0c | 1190 | #undef BPF_MAP_TYPE |
f2e10bff | 1191 | #undef BPF_LINK_TYPE |
0fc174de | 1192 | |
ab3f0063 | 1193 | extern const struct bpf_prog_ops bpf_offload_prog_ops; |
4f9218aa JK |
1194 | extern const struct bpf_verifier_ops tc_cls_act_analyzer_ops; |
1195 | extern const struct bpf_verifier_ops xdp_analyzer_ops; | |
1196 | ||
0fc174de | 1197 | struct bpf_prog *bpf_prog_get(u32 ufd); |
248f346f | 1198 | struct bpf_prog *bpf_prog_get_type_dev(u32 ufd, enum bpf_prog_type type, |
288b3de5 | 1199 | bool attach_drv); |
85192dbf | 1200 | void bpf_prog_add(struct bpf_prog *prog, int i); |
c540594f | 1201 | void bpf_prog_sub(struct bpf_prog *prog, int i); |
85192dbf | 1202 | void bpf_prog_inc(struct bpf_prog *prog); |
a6f6df69 | 1203 | struct bpf_prog * __must_check bpf_prog_inc_not_zero(struct bpf_prog *prog); |
61e021f3 | 1204 | void bpf_prog_put(struct bpf_prog *prog); |
5ccb071e DB |
1205 | int __bpf_prog_charge(struct user_struct *user, u32 pages); |
1206 | void __bpf_prog_uncharge(struct user_struct *user, u32 pages); | |
a2ea0746 DB |
1207 | void __bpf_free_used_maps(struct bpf_prog_aux *aux, |
1208 | struct bpf_map **used_maps, u32 len); | |
61e021f3 | 1209 | |
ad8ad79f | 1210 | void bpf_prog_free_id(struct bpf_prog *prog, bool do_idr_lock); |
a3884572 | 1211 | void bpf_map_free_id(struct bpf_map *map, bool do_idr_lock); |
ad8ad79f | 1212 | |
1ed4d924 | 1213 | struct bpf_map *bpf_map_get(u32 ufd); |
c9da161c | 1214 | struct bpf_map *bpf_map_get_with_uref(u32 ufd); |
c2101297 | 1215 | struct bpf_map *__bpf_map_get(struct fd f); |
1e0bd5a0 AN |
1216 | void bpf_map_inc(struct bpf_map *map); |
1217 | void bpf_map_inc_with_uref(struct bpf_map *map); | |
1218 | struct bpf_map * __must_check bpf_map_inc_not_zero(struct bpf_map *map); | |
c9da161c | 1219 | void bpf_map_put_with_uref(struct bpf_map *map); |
61e021f3 | 1220 | void bpf_map_put(struct bpf_map *map); |
0a4c58f5 RG |
1221 | int bpf_map_charge_memlock(struct bpf_map *map, u32 pages); |
1222 | void bpf_map_uncharge_memlock(struct bpf_map *map, u32 pages); | |
196e8ca7 | 1223 | int bpf_map_charge_init(struct bpf_map_memory *mem, u64 size); |
b936ca64 RG |
1224 | void bpf_map_charge_finish(struct bpf_map_memory *mem); |
1225 | void bpf_map_charge_move(struct bpf_map_memory *dst, | |
1226 | struct bpf_map_memory *src); | |
196e8ca7 DB |
1227 | void *bpf_map_area_alloc(u64 size, int numa_node); |
1228 | void *bpf_map_area_mmapable_alloc(u64 size, int numa_node); | |
d407bd25 | 1229 | void bpf_map_area_free(void *base); |
bd475643 | 1230 | void bpf_map_init_from_attr(struct bpf_map *map, union bpf_attr *attr); |
cb4d03ab BV |
1231 | int generic_map_lookup_batch(struct bpf_map *map, |
1232 | const union bpf_attr *attr, | |
aa2e93b8 BV |
1233 | union bpf_attr __user *uattr); |
1234 | int generic_map_update_batch(struct bpf_map *map, | |
1235 | const union bpf_attr *attr, | |
1236 | union bpf_attr __user *uattr); | |
1237 | int generic_map_delete_batch(struct bpf_map *map, | |
1238 | const union bpf_attr *attr, | |
cb4d03ab | 1239 | union bpf_attr __user *uattr); |
6086d29d | 1240 | struct bpf_map *bpf_map_get_curr_or_next(u32 *id); |
a228a64f | 1241 | struct bpf_prog *bpf_prog_get_curr_or_next(u32 *id); |
61e021f3 | 1242 | |
1be7f75d AS |
1243 | extern int sysctl_unprivileged_bpf_disabled; |
1244 | ||
2c78ee89 AS |
1245 | static inline bool bpf_allow_ptr_leaks(void) |
1246 | { | |
1247 | return perfmon_capable(); | |
1248 | } | |
1249 | ||
41c48f3a AI |
1250 | static inline bool bpf_allow_ptr_to_map_access(void) |
1251 | { | |
1252 | return perfmon_capable(); | |
1253 | } | |
1254 | ||
2c78ee89 AS |
1255 | static inline bool bpf_bypass_spec_v1(void) |
1256 | { | |
1257 | return perfmon_capable(); | |
1258 | } | |
1259 | ||
1260 | static inline bool bpf_bypass_spec_v4(void) | |
1261 | { | |
1262 | return perfmon_capable(); | |
1263 | } | |
1264 | ||
6e71b04a | 1265 | int bpf_map_new_fd(struct bpf_map *map, int flags); |
b2197755 DB |
1266 | int bpf_prog_new_fd(struct bpf_prog *prog); |
1267 | ||
f2e10bff | 1268 | void bpf_link_init(struct bpf_link *link, enum bpf_link_type type, |
a3b80e10 AN |
1269 | const struct bpf_link_ops *ops, struct bpf_prog *prog); |
1270 | int bpf_link_prime(struct bpf_link *link, struct bpf_link_primer *primer); | |
1271 | int bpf_link_settle(struct bpf_link_primer *primer); | |
1272 | void bpf_link_cleanup(struct bpf_link_primer *primer); | |
70ed506c AN |
1273 | void bpf_link_inc(struct bpf_link *link); |
1274 | void bpf_link_put(struct bpf_link *link); | |
1275 | int bpf_link_new_fd(struct bpf_link *link); | |
babf3164 | 1276 | struct file *bpf_link_new_file(struct bpf_link *link, int *reserved_fd); |
70ed506c AN |
1277 | struct bpf_link *bpf_link_get_from_fd(u32 ufd); |
1278 | ||
b2197755 | 1279 | int bpf_obj_pin_user(u32 ufd, const char __user *pathname); |
6e71b04a | 1280 | int bpf_obj_get_user(const char __user *pathname, int flags); |
b2197755 | 1281 | |
21aef70e | 1282 | #define BPF_ITER_FUNC_PREFIX "bpf_iter_" |
e5158d98 | 1283 | #define DEFINE_BPF_ITER_FUNC(target, args...) \ |
21aef70e YS |
1284 | extern int bpf_iter_ ## target(args); \ |
1285 | int __init bpf_iter_ ## target(args) { return 0; } | |
15d83c4d | 1286 | |
f9c79272 | 1287 | struct bpf_iter_aux_info { |
a5cbe05a | 1288 | struct bpf_map *map; |
f9c79272 YS |
1289 | }; |
1290 | ||
5e7b3020 YS |
1291 | typedef int (*bpf_iter_attach_target_t)(struct bpf_prog *prog, |
1292 | union bpf_iter_link_info *linfo, | |
1293 | struct bpf_iter_aux_info *aux); | |
1294 | typedef void (*bpf_iter_detach_target_t)(struct bpf_iter_aux_info *aux); | |
6b0a249a YS |
1295 | typedef void (*bpf_iter_show_fdinfo_t) (const struct bpf_iter_aux_info *aux, |
1296 | struct seq_file *seq); | |
1297 | typedef int (*bpf_iter_fill_link_info_t)(const struct bpf_iter_aux_info *aux, | |
1298 | struct bpf_link_info *info); | |
a5cbe05a | 1299 | |
cf83b2d2 YS |
1300 | enum bpf_iter_feature { |
1301 | BPF_ITER_RESCHED = BIT(0), | |
1302 | }; | |
1303 | ||
3c32cc1b | 1304 | #define BPF_ITER_CTX_ARG_MAX 2 |
ae24345d YS |
1305 | struct bpf_iter_reg { |
1306 | const char *target; | |
5e7b3020 YS |
1307 | bpf_iter_attach_target_t attach_target; |
1308 | bpf_iter_detach_target_t detach_target; | |
6b0a249a YS |
1309 | bpf_iter_show_fdinfo_t show_fdinfo; |
1310 | bpf_iter_fill_link_info_t fill_link_info; | |
3c32cc1b | 1311 | u32 ctx_arg_info_size; |
cf83b2d2 | 1312 | u32 feature; |
3c32cc1b | 1313 | struct bpf_ctx_arg_aux ctx_arg_info[BPF_ITER_CTX_ARG_MAX]; |
14fc6bd6 | 1314 | const struct bpf_iter_seq_info *seq_info; |
ae24345d YS |
1315 | }; |
1316 | ||
e5158d98 YS |
1317 | struct bpf_iter_meta { |
1318 | __bpf_md_ptr(struct seq_file *, seq); | |
1319 | u64 session_id; | |
1320 | u64 seq_num; | |
1321 | }; | |
1322 | ||
a5cbe05a YS |
1323 | struct bpf_iter__bpf_map_elem { |
1324 | __bpf_md_ptr(struct bpf_iter_meta *, meta); | |
1325 | __bpf_md_ptr(struct bpf_map *, map); | |
1326 | __bpf_md_ptr(void *, key); | |
1327 | __bpf_md_ptr(void *, value); | |
1328 | }; | |
1329 | ||
15172a46 | 1330 | int bpf_iter_reg_target(const struct bpf_iter_reg *reg_info); |
ab2ee4fc | 1331 | void bpf_iter_unreg_target(const struct bpf_iter_reg *reg_info); |
15d83c4d | 1332 | bool bpf_iter_prog_supported(struct bpf_prog *prog); |
de4e05ca | 1333 | int bpf_iter_link_attach(const union bpf_attr *attr, struct bpf_prog *prog); |
ac51d99b | 1334 | int bpf_iter_new_fd(struct bpf_link *link); |
367ec3e4 | 1335 | bool bpf_link_is_iter(struct bpf_link *link); |
e5158d98 YS |
1336 | struct bpf_prog *bpf_iter_get_info(struct bpf_iter_meta *meta, bool in_stop); |
1337 | int bpf_iter_run_prog(struct bpf_prog *prog, void *ctx); | |
b76f2226 YS |
1338 | void bpf_iter_map_show_fdinfo(const struct bpf_iter_aux_info *aux, |
1339 | struct seq_file *seq); | |
1340 | int bpf_iter_map_fill_link_info(const struct bpf_iter_aux_info *aux, | |
1341 | struct bpf_link_info *info); | |
ae24345d | 1342 | |
15a07b33 AS |
1343 | int bpf_percpu_hash_copy(struct bpf_map *map, void *key, void *value); |
1344 | int bpf_percpu_array_copy(struct bpf_map *map, void *key, void *value); | |
1345 | int bpf_percpu_hash_update(struct bpf_map *map, void *key, void *value, | |
1346 | u64 flags); | |
1347 | int bpf_percpu_array_update(struct bpf_map *map, void *key, void *value, | |
1348 | u64 flags); | |
d056a788 | 1349 | |
557c0c6e | 1350 | int bpf_stackmap_copy(struct bpf_map *map, void *key, void *value); |
15a07b33 | 1351 | |
d056a788 DB |
1352 | int bpf_fd_array_map_update_elem(struct bpf_map *map, struct file *map_file, |
1353 | void *key, void *value, u64 map_flags); | |
14dc6f04 | 1354 | int bpf_fd_array_map_lookup_elem(struct bpf_map *map, void *key, u32 *value); |
bcc6b1b7 MKL |
1355 | int bpf_fd_htab_map_update_elem(struct bpf_map *map, struct file *map_file, |
1356 | void *key, void *value, u64 map_flags); | |
14dc6f04 | 1357 | int bpf_fd_htab_map_lookup_elem(struct bpf_map *map, void *key, u32 *value); |
d056a788 | 1358 | |
6e71b04a | 1359 | int bpf_get_file_flag(int flags); |
dcab51f1 MKL |
1360 | int bpf_check_uarg_tail_zero(void __user *uaddr, size_t expected_size, |
1361 | size_t actual_size); | |
6e71b04a | 1362 | |
15a07b33 AS |
1363 | /* memcpy that is used with 8-byte aligned pointers, power-of-8 size and |
1364 | * forced to use 'long' read/writes to try to atomically copy long counters. | |
1365 | * Best-effort only. No barriers here, since it _will_ race with concurrent | |
1366 | * updates from BPF programs. Called from bpf syscall and mostly used with | |
1367 | * size 8 or 16 bytes, so ask compiler to inline it. | |
1368 | */ | |
1369 | static inline void bpf_long_memcpy(void *dst, const void *src, u32 size) | |
1370 | { | |
1371 | const long *lsrc = src; | |
1372 | long *ldst = dst; | |
1373 | ||
1374 | size /= sizeof(long); | |
1375 | while (size--) | |
1376 | *ldst++ = *lsrc++; | |
1377 | } | |
1378 | ||
61e021f3 | 1379 | /* verify correctness of eBPF program */ |
838e9690 YS |
1380 | int bpf_check(struct bpf_prog **fp, union bpf_attr *attr, |
1381 | union bpf_attr __user *uattr); | |
1ea47e01 | 1382 | void bpf_patch_call_args(struct bpf_insn *insn, u32 stack_depth); |
46f55cff | 1383 | |
76654e67 AM |
1384 | struct btf *bpf_get_btf_vmlinux(void); |
1385 | ||
46f55cff | 1386 | /* Map specifics */ |
67f29e07 | 1387 | struct xdp_buff; |
6d5fc195 | 1388 | struct sk_buff; |
67f29e07 JDB |
1389 | |
1390 | struct bpf_dtab_netdev *__dev_map_lookup_elem(struct bpf_map *map, u32 key); | |
6f9d451a | 1391 | struct bpf_dtab_netdev *__dev_map_hash_lookup_elem(struct bpf_map *map, u32 key); |
1d233886 THJ |
1392 | void __dev_flush(void); |
1393 | int dev_xdp_enqueue(struct net_device *dev, struct xdp_buff *xdp, | |
1394 | struct net_device *dev_rx); | |
38edddb8 JDB |
1395 | int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp, |
1396 | struct net_device *dev_rx); | |
6d5fc195 TM |
1397 | int dev_map_generic_redirect(struct bpf_dtab_netdev *dst, struct sk_buff *skb, |
1398 | struct bpf_prog *xdp_prog); | |
fbee97fe | 1399 | bool dev_map_can_have_prog(struct bpf_map *map); |
46f55cff | 1400 | |
9c270af3 | 1401 | struct bpf_cpu_map_entry *__cpu_map_lookup_elem(struct bpf_map *map, u32 key); |
cdfafe98 | 1402 | void __cpu_map_flush(void); |
9c270af3 JDB |
1403 | int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu, struct xdp_buff *xdp, |
1404 | struct net_device *dev_rx); | |
92164774 | 1405 | bool cpu_map_prog_allowed(struct bpf_map *map); |
9c270af3 | 1406 | |
96eabe7a MKL |
1407 | /* Return map's numa specified by userspace */ |
1408 | static inline int bpf_map_attr_numa_node(const union bpf_attr *attr) | |
1409 | { | |
1410 | return (attr->map_flags & BPF_F_NUMA_NODE) ? | |
1411 | attr->numa_node : NUMA_NO_NODE; | |
1412 | } | |
1413 | ||
040ee692 | 1414 | struct bpf_prog *bpf_prog_get_type_path(const char *name, enum bpf_prog_type type); |
5dc4c4b7 | 1415 | int array_map_alloc_check(union bpf_attr *attr); |
040ee692 | 1416 | |
c695865c SF |
1417 | int bpf_prog_test_run_xdp(struct bpf_prog *prog, const union bpf_attr *kattr, |
1418 | union bpf_attr __user *uattr); | |
1419 | int bpf_prog_test_run_skb(struct bpf_prog *prog, const union bpf_attr *kattr, | |
1420 | union bpf_attr __user *uattr); | |
da00d2f1 KS |
1421 | int bpf_prog_test_run_tracing(struct bpf_prog *prog, |
1422 | const union bpf_attr *kattr, | |
1423 | union bpf_attr __user *uattr); | |
c695865c SF |
1424 | int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog, |
1425 | const union bpf_attr *kattr, | |
1426 | union bpf_attr __user *uattr); | |
1b4d60ec SL |
1427 | int bpf_prog_test_run_raw_tp(struct bpf_prog *prog, |
1428 | const union bpf_attr *kattr, | |
1429 | union bpf_attr __user *uattr); | |
9e15db66 AS |
1430 | bool btf_ctx_access(int off, int size, enum bpf_access_type type, |
1431 | const struct bpf_prog *prog, | |
1432 | struct bpf_insn_access_aux *info); | |
1433 | int btf_struct_access(struct bpf_verifier_log *log, | |
1434 | const struct btf_type *t, int off, int size, | |
1435 | enum bpf_access_type atype, | |
1436 | u32 *next_btf_id); | |
faaf4a79 JO |
1437 | bool btf_struct_ids_match(struct bpf_verifier_log *log, |
1438 | int off, u32 id, u32 need_type_id); | |
9e15db66 | 1439 | |
fec56f58 AS |
1440 | int btf_distill_func_proto(struct bpf_verifier_log *log, |
1441 | struct btf *btf, | |
1442 | const struct btf_type *func_proto, | |
1443 | const char *func_name, | |
1444 | struct btf_func_model *m); | |
1445 | ||
51c39bb1 AS |
1446 | struct bpf_reg_state; |
1447 | int btf_check_func_arg_match(struct bpf_verifier_env *env, int subprog, | |
1448 | struct bpf_reg_state *regs); | |
1449 | int btf_prepare_func_args(struct bpf_verifier_env *env, int subprog, | |
1450 | struct bpf_reg_state *reg); | |
efc68158 | 1451 | int btf_check_type_match(struct bpf_verifier_log *log, const struct bpf_prog *prog, |
be8704ff | 1452 | struct btf *btf, const struct btf_type *t); |
8c1b6e69 | 1453 | |
7e6897f9 | 1454 | struct bpf_prog *bpf_prog_by_id(u32 id); |
005142b8 | 1455 | struct bpf_link *bpf_link_by_id(u32 id); |
7e6897f9 | 1456 | |
6890896b | 1457 | const struct bpf_func_proto *bpf_base_func_proto(enum bpf_func_id func_id); |
9c270af3 | 1458 | #else /* !CONFIG_BPF_SYSCALL */ |
0fc174de DB |
1459 | static inline struct bpf_prog *bpf_prog_get(u32 ufd) |
1460 | { | |
1461 | return ERR_PTR(-EOPNOTSUPP); | |
1462 | } | |
1463 | ||
248f346f JK |
1464 | static inline struct bpf_prog *bpf_prog_get_type_dev(u32 ufd, |
1465 | enum bpf_prog_type type, | |
288b3de5 | 1466 | bool attach_drv) |
248f346f JK |
1467 | { |
1468 | return ERR_PTR(-EOPNOTSUPP); | |
1469 | } | |
1470 | ||
85192dbf | 1471 | static inline void bpf_prog_add(struct bpf_prog *prog, int i) |
cc2e0b3f | 1472 | { |
cc2e0b3f | 1473 | } |
113214be | 1474 | |
c540594f DB |
1475 | static inline void bpf_prog_sub(struct bpf_prog *prog, int i) |
1476 | { | |
1477 | } | |
1478 | ||
0fc174de DB |
1479 | static inline void bpf_prog_put(struct bpf_prog *prog) |
1480 | { | |
1481 | } | |
6d67942d | 1482 | |
85192dbf | 1483 | static inline void bpf_prog_inc(struct bpf_prog *prog) |
aa6a5f3c | 1484 | { |
aa6a5f3c | 1485 | } |
5ccb071e | 1486 | |
a6f6df69 JF |
1487 | static inline struct bpf_prog *__must_check |
1488 | bpf_prog_inc_not_zero(struct bpf_prog *prog) | |
1489 | { | |
1490 | return ERR_PTR(-EOPNOTSUPP); | |
1491 | } | |
1492 | ||
5ccb071e DB |
1493 | static inline int __bpf_prog_charge(struct user_struct *user, u32 pages) |
1494 | { | |
1495 | return 0; | |
1496 | } | |
1497 | ||
1498 | static inline void __bpf_prog_uncharge(struct user_struct *user, u32 pages) | |
1499 | { | |
1500 | } | |
46f55cff | 1501 | |
6cc7d1e8 AN |
1502 | static inline void bpf_link_init(struct bpf_link *link, enum bpf_link_type type, |
1503 | const struct bpf_link_ops *ops, | |
1504 | struct bpf_prog *prog) | |
1505 | { | |
1506 | } | |
1507 | ||
1508 | static inline int bpf_link_prime(struct bpf_link *link, | |
1509 | struct bpf_link_primer *primer) | |
1510 | { | |
1511 | return -EOPNOTSUPP; | |
1512 | } | |
1513 | ||
1514 | static inline int bpf_link_settle(struct bpf_link_primer *primer) | |
1515 | { | |
1516 | return -EOPNOTSUPP; | |
1517 | } | |
1518 | ||
1519 | static inline void bpf_link_cleanup(struct bpf_link_primer *primer) | |
1520 | { | |
1521 | } | |
1522 | ||
1523 | static inline void bpf_link_inc(struct bpf_link *link) | |
1524 | { | |
1525 | } | |
1526 | ||
1527 | static inline void bpf_link_put(struct bpf_link *link) | |
1528 | { | |
1529 | } | |
1530 | ||
6e71b04a | 1531 | static inline int bpf_obj_get_user(const char __user *pathname, int flags) |
98589a09 SL |
1532 | { |
1533 | return -EOPNOTSUPP; | |
1534 | } | |
1535 | ||
46f55cff JF |
1536 | static inline struct net_device *__dev_map_lookup_elem(struct bpf_map *map, |
1537 | u32 key) | |
1538 | { | |
1539 | return NULL; | |
1540 | } | |
1541 | ||
6f9d451a THJ |
1542 | static inline struct net_device *__dev_map_hash_lookup_elem(struct bpf_map *map, |
1543 | u32 key) | |
1544 | { | |
1545 | return NULL; | |
1546 | } | |
fbee97fe DA |
1547 | static inline bool dev_map_can_have_prog(struct bpf_map *map) |
1548 | { | |
1549 | return false; | |
1550 | } | |
6f9d451a | 1551 | |
1d233886 | 1552 | static inline void __dev_flush(void) |
46f55cff JF |
1553 | { |
1554 | } | |
9c270af3 | 1555 | |
67f29e07 JDB |
1556 | struct xdp_buff; |
1557 | struct bpf_dtab_netdev; | |
1558 | ||
1d233886 THJ |
1559 | static inline |
1560 | int dev_xdp_enqueue(struct net_device *dev, struct xdp_buff *xdp, | |
1561 | struct net_device *dev_rx) | |
1562 | { | |
1563 | return 0; | |
1564 | } | |
1565 | ||
67f29e07 | 1566 | static inline |
38edddb8 JDB |
1567 | int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp, |
1568 | struct net_device *dev_rx) | |
67f29e07 JDB |
1569 | { |
1570 | return 0; | |
1571 | } | |
1572 | ||
6d5fc195 TM |
1573 | struct sk_buff; |
1574 | ||
1575 | static inline int dev_map_generic_redirect(struct bpf_dtab_netdev *dst, | |
1576 | struct sk_buff *skb, | |
1577 | struct bpf_prog *xdp_prog) | |
1578 | { | |
1579 | return 0; | |
1580 | } | |
1581 | ||
9c270af3 JDB |
1582 | static inline |
1583 | struct bpf_cpu_map_entry *__cpu_map_lookup_elem(struct bpf_map *map, u32 key) | |
1584 | { | |
1585 | return NULL; | |
1586 | } | |
1587 | ||
cdfafe98 | 1588 | static inline void __cpu_map_flush(void) |
9c270af3 JDB |
1589 | { |
1590 | } | |
1591 | ||
9c270af3 JDB |
1592 | static inline int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu, |
1593 | struct xdp_buff *xdp, | |
1594 | struct net_device *dev_rx) | |
1595 | { | |
1596 | return 0; | |
1597 | } | |
040ee692 | 1598 | |
92164774 LB |
1599 | static inline bool cpu_map_prog_allowed(struct bpf_map *map) |
1600 | { | |
1601 | return false; | |
1602 | } | |
1603 | ||
040ee692 AV |
1604 | static inline struct bpf_prog *bpf_prog_get_type_path(const char *name, |
1605 | enum bpf_prog_type type) | |
1606 | { | |
1607 | return ERR_PTR(-EOPNOTSUPP); | |
1608 | } | |
c695865c SF |
1609 | |
1610 | static inline int bpf_prog_test_run_xdp(struct bpf_prog *prog, | |
1611 | const union bpf_attr *kattr, | |
1612 | union bpf_attr __user *uattr) | |
1613 | { | |
1614 | return -ENOTSUPP; | |
1615 | } | |
1616 | ||
1617 | static inline int bpf_prog_test_run_skb(struct bpf_prog *prog, | |
1618 | const union bpf_attr *kattr, | |
1619 | union bpf_attr __user *uattr) | |
1620 | { | |
1621 | return -ENOTSUPP; | |
1622 | } | |
1623 | ||
da00d2f1 KS |
1624 | static inline int bpf_prog_test_run_tracing(struct bpf_prog *prog, |
1625 | const union bpf_attr *kattr, | |
1626 | union bpf_attr __user *uattr) | |
1627 | { | |
1628 | return -ENOTSUPP; | |
1629 | } | |
1630 | ||
c695865c SF |
1631 | static inline int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog, |
1632 | const union bpf_attr *kattr, | |
1633 | union bpf_attr __user *uattr) | |
1634 | { | |
1635 | return -ENOTSUPP; | |
1636 | } | |
6332be04 DB |
1637 | |
1638 | static inline void bpf_map_put(struct bpf_map *map) | |
1639 | { | |
1640 | } | |
7e6897f9 BT |
1641 | |
1642 | static inline struct bpf_prog *bpf_prog_by_id(u32 id) | |
1643 | { | |
1644 | return ERR_PTR(-ENOTSUPP); | |
1645 | } | |
6890896b SF |
1646 | |
1647 | static inline const struct bpf_func_proto * | |
1648 | bpf_base_func_proto(enum bpf_func_id func_id) | |
1649 | { | |
1650 | return NULL; | |
1651 | } | |
61e021f3 | 1652 | #endif /* CONFIG_BPF_SYSCALL */ |
09756af4 | 1653 | |
479321e9 JK |
1654 | static inline struct bpf_prog *bpf_prog_get_type(u32 ufd, |
1655 | enum bpf_prog_type type) | |
1656 | { | |
1657 | return bpf_prog_get_type_dev(ufd, type, false); | |
1658 | } | |
1659 | ||
040ee692 AV |
1660 | bool bpf_prog_get_ok(struct bpf_prog *, enum bpf_prog_type *, bool); |
1661 | ||
ab3f0063 JK |
1662 | int bpf_prog_offload_compile(struct bpf_prog *prog); |
1663 | void bpf_prog_offload_destroy(struct bpf_prog *prog); | |
675fc275 JK |
1664 | int bpf_prog_offload_info_fill(struct bpf_prog_info *info, |
1665 | struct bpf_prog *prog); | |
ab3f0063 | 1666 | |
52775b33 JK |
1667 | int bpf_map_offload_info_fill(struct bpf_map_info *info, struct bpf_map *map); |
1668 | ||
a3884572 JK |
1669 | int bpf_map_offload_lookup_elem(struct bpf_map *map, void *key, void *value); |
1670 | int bpf_map_offload_update_elem(struct bpf_map *map, | |
1671 | void *key, void *value, u64 flags); | |
1672 | int bpf_map_offload_delete_elem(struct bpf_map *map, void *key); | |
1673 | int bpf_map_offload_get_next_key(struct bpf_map *map, | |
1674 | void *key, void *next_key); | |
1675 | ||
09728266 | 1676 | bool bpf_offload_prog_map_match(struct bpf_prog *prog, struct bpf_map *map); |
a3884572 | 1677 | |
1385d755 | 1678 | struct bpf_offload_dev * |
dd27c2e3 | 1679 | bpf_offload_dev_create(const struct bpf_prog_offload_ops *ops, void *priv); |
602144c2 | 1680 | void bpf_offload_dev_destroy(struct bpf_offload_dev *offdev); |
dd27c2e3 | 1681 | void *bpf_offload_dev_priv(struct bpf_offload_dev *offdev); |
602144c2 JK |
1682 | int bpf_offload_dev_netdev_register(struct bpf_offload_dev *offdev, |
1683 | struct net_device *netdev); | |
1684 | void bpf_offload_dev_netdev_unregister(struct bpf_offload_dev *offdev, | |
1685 | struct net_device *netdev); | |
fd4f227d | 1686 | bool bpf_offload_dev_match(struct bpf_prog *prog, struct net_device *netdev); |
9fd7c555 | 1687 | |
ab3f0063 JK |
1688 | #if defined(CONFIG_NET) && defined(CONFIG_BPF_SYSCALL) |
1689 | int bpf_prog_offload_init(struct bpf_prog *prog, union bpf_attr *attr); | |
1690 | ||
0d830032 | 1691 | static inline bool bpf_prog_is_dev_bound(const struct bpf_prog_aux *aux) |
ab3f0063 | 1692 | { |
9a18eedb | 1693 | return aux->offload_requested; |
ab3f0063 | 1694 | } |
a3884572 JK |
1695 | |
1696 | static inline bool bpf_map_is_dev_bound(struct bpf_map *map) | |
1697 | { | |
1698 | return unlikely(map->ops == &bpf_map_offload_ops); | |
1699 | } | |
1700 | ||
1701 | struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr); | |
1702 | void bpf_map_offload_map_free(struct bpf_map *map); | |
ab3f0063 JK |
1703 | #else |
1704 | static inline int bpf_prog_offload_init(struct bpf_prog *prog, | |
1705 | union bpf_attr *attr) | |
1706 | { | |
1707 | return -EOPNOTSUPP; | |
1708 | } | |
1709 | ||
1710 | static inline bool bpf_prog_is_dev_bound(struct bpf_prog_aux *aux) | |
1711 | { | |
1712 | return false; | |
1713 | } | |
a3884572 JK |
1714 | |
1715 | static inline bool bpf_map_is_dev_bound(struct bpf_map *map) | |
1716 | { | |
1717 | return false; | |
1718 | } | |
1719 | ||
1720 | static inline struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr) | |
1721 | { | |
1722 | return ERR_PTR(-EOPNOTSUPP); | |
1723 | } | |
1724 | ||
1725 | static inline void bpf_map_offload_map_free(struct bpf_map *map) | |
1726 | { | |
1727 | } | |
ab3f0063 JK |
1728 | #endif /* CONFIG_NET && CONFIG_BPF_SYSCALL */ |
1729 | ||
604326b4 | 1730 | #if defined(CONFIG_BPF_STREAM_PARSER) |
bb0de313 LB |
1731 | int sock_map_prog_update(struct bpf_map *map, struct bpf_prog *prog, |
1732 | struct bpf_prog *old, u32 which); | |
604326b4 | 1733 | int sock_map_get_from_fd(const union bpf_attr *attr, struct bpf_prog *prog); |
bb0de313 | 1734 | int sock_map_prog_detach(const union bpf_attr *attr, enum bpf_prog_type ptype); |
13b79d3f | 1735 | int sock_map_update_elem_sys(struct bpf_map *map, void *key, void *value, u64 flags); |
f747632b LB |
1736 | void sock_map_unhash(struct sock *sk); |
1737 | void sock_map_close(struct sock *sk, long timeout); | |
6bdc9c4c | 1738 | #else |
604326b4 | 1739 | static inline int sock_map_prog_update(struct bpf_map *map, |
bb0de313 LB |
1740 | struct bpf_prog *prog, |
1741 | struct bpf_prog *old, u32 which) | |
464bc0fd JF |
1742 | { |
1743 | return -EOPNOTSUPP; | |
1744 | } | |
fdb5c453 | 1745 | |
604326b4 DB |
1746 | static inline int sock_map_get_from_fd(const union bpf_attr *attr, |
1747 | struct bpf_prog *prog) | |
fdb5c453 SY |
1748 | { |
1749 | return -EINVAL; | |
1750 | } | |
bb0de313 LB |
1751 | |
1752 | static inline int sock_map_prog_detach(const union bpf_attr *attr, | |
1753 | enum bpf_prog_type ptype) | |
1754 | { | |
1755 | return -EOPNOTSUPP; | |
1756 | } | |
13b79d3f LB |
1757 | |
1758 | static inline int sock_map_update_elem_sys(struct bpf_map *map, void *key, void *value, | |
1759 | u64 flags) | |
1760 | { | |
1761 | return -EOPNOTSUPP; | |
1762 | } | |
f747632b | 1763 | #endif /* CONFIG_BPF_STREAM_PARSER */ |
6bdc9c4c | 1764 | |
5dc4c4b7 MKL |
1765 | #if defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL) |
1766 | void bpf_sk_reuseport_detach(struct sock *sk); | |
1767 | int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map, void *key, | |
1768 | void *value); | |
1769 | int bpf_fd_reuseport_array_update_elem(struct bpf_map *map, void *key, | |
1770 | void *value, u64 map_flags); | |
1771 | #else | |
1772 | static inline void bpf_sk_reuseport_detach(struct sock *sk) | |
1773 | { | |
1774 | } | |
1775 | ||
1776 | #ifdef CONFIG_BPF_SYSCALL | |
1777 | static inline int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map, | |
1778 | void *key, void *value) | |
1779 | { | |
1780 | return -EOPNOTSUPP; | |
1781 | } | |
1782 | ||
1783 | static inline int bpf_fd_reuseport_array_update_elem(struct bpf_map *map, | |
1784 | void *key, void *value, | |
1785 | u64 map_flags) | |
1786 | { | |
1787 | return -EOPNOTSUPP; | |
1788 | } | |
1789 | #endif /* CONFIG_BPF_SYSCALL */ | |
1790 | #endif /* defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL) */ | |
1791 | ||
d0003ec0 | 1792 | /* verifier prototypes for helper functions called from eBPF programs */ |
a2c83fff DB |
1793 | extern const struct bpf_func_proto bpf_map_lookup_elem_proto; |
1794 | extern const struct bpf_func_proto bpf_map_update_elem_proto; | |
1795 | extern const struct bpf_func_proto bpf_map_delete_elem_proto; | |
f1a2e44a MV |
1796 | extern const struct bpf_func_proto bpf_map_push_elem_proto; |
1797 | extern const struct bpf_func_proto bpf_map_pop_elem_proto; | |
1798 | extern const struct bpf_func_proto bpf_map_peek_elem_proto; | |
d0003ec0 | 1799 | |
03e69b50 | 1800 | extern const struct bpf_func_proto bpf_get_prandom_u32_proto; |
c04167ce | 1801 | extern const struct bpf_func_proto bpf_get_smp_processor_id_proto; |
2d0e30c3 | 1802 | extern const struct bpf_func_proto bpf_get_numa_node_id_proto; |
04fd61ab | 1803 | extern const struct bpf_func_proto bpf_tail_call_proto; |
17ca8cbf | 1804 | extern const struct bpf_func_proto bpf_ktime_get_ns_proto; |
71d19214 | 1805 | extern const struct bpf_func_proto bpf_ktime_get_boot_ns_proto; |
ffeedafb AS |
1806 | extern const struct bpf_func_proto bpf_get_current_pid_tgid_proto; |
1807 | extern const struct bpf_func_proto bpf_get_current_uid_gid_proto; | |
1808 | extern const struct bpf_func_proto bpf_get_current_comm_proto; | |
d5a3b1f6 | 1809 | extern const struct bpf_func_proto bpf_get_stackid_proto; |
c195651e | 1810 | extern const struct bpf_func_proto bpf_get_stack_proto; |
fa28dcb8 | 1811 | extern const struct bpf_func_proto bpf_get_task_stack_proto; |
7b04d6d6 SL |
1812 | extern const struct bpf_func_proto bpf_get_stackid_proto_pe; |
1813 | extern const struct bpf_func_proto bpf_get_stack_proto_pe; | |
174a79ff | 1814 | extern const struct bpf_func_proto bpf_sock_map_update_proto; |
81110384 | 1815 | extern const struct bpf_func_proto bpf_sock_hash_update_proto; |
bf6fa2c8 | 1816 | extern const struct bpf_func_proto bpf_get_current_cgroup_id_proto; |
0f09abd1 | 1817 | extern const struct bpf_func_proto bpf_get_current_ancestor_cgroup_id_proto; |
604326b4 DB |
1818 | extern const struct bpf_func_proto bpf_msg_redirect_hash_proto; |
1819 | extern const struct bpf_func_proto bpf_msg_redirect_map_proto; | |
1820 | extern const struct bpf_func_proto bpf_sk_redirect_hash_proto; | |
1821 | extern const struct bpf_func_proto bpf_sk_redirect_map_proto; | |
d83525ca AS |
1822 | extern const struct bpf_func_proto bpf_spin_lock_proto; |
1823 | extern const struct bpf_func_proto bpf_spin_unlock_proto; | |
cd339431 | 1824 | extern const struct bpf_func_proto bpf_get_local_storage_proto; |
d7a4cb9b AI |
1825 | extern const struct bpf_func_proto bpf_strtol_proto; |
1826 | extern const struct bpf_func_proto bpf_strtoul_proto; | |
0d01da6a | 1827 | extern const struct bpf_func_proto bpf_tcp_sock_proto; |
5576b991 | 1828 | extern const struct bpf_func_proto bpf_jiffies64_proto; |
b4490c5c | 1829 | extern const struct bpf_func_proto bpf_get_ns_current_pid_tgid_proto; |
0456ea17 | 1830 | extern const struct bpf_func_proto bpf_event_output_data_proto; |
457f4436 AN |
1831 | extern const struct bpf_func_proto bpf_ringbuf_output_proto; |
1832 | extern const struct bpf_func_proto bpf_ringbuf_reserve_proto; | |
1833 | extern const struct bpf_func_proto bpf_ringbuf_submit_proto; | |
1834 | extern const struct bpf_func_proto bpf_ringbuf_discard_proto; | |
1835 | extern const struct bpf_func_proto bpf_ringbuf_query_proto; | |
af7ec138 | 1836 | extern const struct bpf_func_proto bpf_skc_to_tcp6_sock_proto; |
478cfbdf YS |
1837 | extern const struct bpf_func_proto bpf_skc_to_tcp_sock_proto; |
1838 | extern const struct bpf_func_proto bpf_skc_to_tcp_timewait_sock_proto; | |
1839 | extern const struct bpf_func_proto bpf_skc_to_tcp_request_sock_proto; | |
0d4fad3e | 1840 | extern const struct bpf_func_proto bpf_skc_to_udp6_sock_proto; |
07be4c4a | 1841 | extern const struct bpf_func_proto bpf_copy_from_user_proto; |
c4d0bfb4 | 1842 | extern const struct bpf_func_proto bpf_snprintf_btf_proto; |
eaa6bcb7 | 1843 | extern const struct bpf_func_proto bpf_per_cpu_ptr_proto; |
63d9b80d | 1844 | extern const struct bpf_func_proto bpf_this_cpu_ptr_proto; |
d0551261 | 1845 | extern const struct bpf_func_proto bpf_ktime_get_coarse_ns_proto; |
cd339431 | 1846 | |
fc611f47 KS |
1847 | const struct bpf_func_proto *bpf_tracing_func_proto( |
1848 | enum bpf_func_id func_id, const struct bpf_prog *prog); | |
1849 | ||
958a3f2d JO |
1850 | const struct bpf_func_proto *tracing_prog_func_proto( |
1851 | enum bpf_func_id func_id, const struct bpf_prog *prog); | |
1852 | ||
3ad00405 DB |
1853 | /* Shared helpers among cBPF and eBPF. */ |
1854 | void bpf_user_rnd_init_once(void); | |
1855 | u64 bpf_user_rnd_u32(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5); | |
6890896b | 1856 | u64 bpf_get_raw_cpu_id(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5); |
3ad00405 | 1857 | |
c64b7983 | 1858 | #if defined(CONFIG_NET) |
46f8bc92 MKL |
1859 | bool bpf_sock_common_is_valid_access(int off, int size, |
1860 | enum bpf_access_type type, | |
1861 | struct bpf_insn_access_aux *info); | |
c64b7983 JS |
1862 | bool bpf_sock_is_valid_access(int off, int size, enum bpf_access_type type, |
1863 | struct bpf_insn_access_aux *info); | |
1864 | u32 bpf_sock_convert_ctx_access(enum bpf_access_type type, | |
1865 | const struct bpf_insn *si, | |
1866 | struct bpf_insn *insn_buf, | |
1867 | struct bpf_prog *prog, | |
1868 | u32 *target_size); | |
1869 | #else | |
46f8bc92 MKL |
1870 | static inline bool bpf_sock_common_is_valid_access(int off, int size, |
1871 | enum bpf_access_type type, | |
1872 | struct bpf_insn_access_aux *info) | |
1873 | { | |
1874 | return false; | |
1875 | } | |
c64b7983 JS |
1876 | static inline bool bpf_sock_is_valid_access(int off, int size, |
1877 | enum bpf_access_type type, | |
1878 | struct bpf_insn_access_aux *info) | |
1879 | { | |
1880 | return false; | |
1881 | } | |
1882 | static inline u32 bpf_sock_convert_ctx_access(enum bpf_access_type type, | |
1883 | const struct bpf_insn *si, | |
1884 | struct bpf_insn *insn_buf, | |
1885 | struct bpf_prog *prog, | |
1886 | u32 *target_size) | |
1887 | { | |
1888 | return 0; | |
1889 | } | |
1890 | #endif | |
1891 | ||
655a51e5 | 1892 | #ifdef CONFIG_INET |
91cc1a99 AS |
1893 | struct sk_reuseport_kern { |
1894 | struct sk_buff *skb; | |
1895 | struct sock *sk; | |
1896 | struct sock *selected_sk; | |
1897 | void *data_end; | |
1898 | u32 hash; | |
1899 | u32 reuseport_id; | |
1900 | bool bind_inany; | |
1901 | }; | |
655a51e5 MKL |
1902 | bool bpf_tcp_sock_is_valid_access(int off, int size, enum bpf_access_type type, |
1903 | struct bpf_insn_access_aux *info); | |
1904 | ||
1905 | u32 bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type, | |
1906 | const struct bpf_insn *si, | |
1907 | struct bpf_insn *insn_buf, | |
1908 | struct bpf_prog *prog, | |
1909 | u32 *target_size); | |
7f94208c Y |
1910 | |
1911 | bool bpf_xdp_sock_is_valid_access(int off, int size, enum bpf_access_type type, | |
1912 | struct bpf_insn_access_aux *info); | |
1913 | ||
1914 | u32 bpf_xdp_sock_convert_ctx_access(enum bpf_access_type type, | |
1915 | const struct bpf_insn *si, | |
1916 | struct bpf_insn *insn_buf, | |
1917 | struct bpf_prog *prog, | |
1918 | u32 *target_size); | |
655a51e5 MKL |
1919 | #else |
1920 | static inline bool bpf_tcp_sock_is_valid_access(int off, int size, | |
1921 | enum bpf_access_type type, | |
1922 | struct bpf_insn_access_aux *info) | |
1923 | { | |
1924 | return false; | |
1925 | } | |
1926 | ||
1927 | static inline u32 bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type, | |
1928 | const struct bpf_insn *si, | |
1929 | struct bpf_insn *insn_buf, | |
1930 | struct bpf_prog *prog, | |
1931 | u32 *target_size) | |
1932 | { | |
1933 | return 0; | |
1934 | } | |
7f94208c Y |
1935 | static inline bool bpf_xdp_sock_is_valid_access(int off, int size, |
1936 | enum bpf_access_type type, | |
1937 | struct bpf_insn_access_aux *info) | |
1938 | { | |
1939 | return false; | |
1940 | } | |
1941 | ||
1942 | static inline u32 bpf_xdp_sock_convert_ctx_access(enum bpf_access_type type, | |
1943 | const struct bpf_insn *si, | |
1944 | struct bpf_insn *insn_buf, | |
1945 | struct bpf_prog *prog, | |
1946 | u32 *target_size) | |
1947 | { | |
1948 | return 0; | |
1949 | } | |
655a51e5 MKL |
1950 | #endif /* CONFIG_INET */ |
1951 | ||
5964b200 | 1952 | enum bpf_text_poke_type { |
b553a6ec DB |
1953 | BPF_MOD_CALL, |
1954 | BPF_MOD_JUMP, | |
5964b200 | 1955 | }; |
4b3da77b | 1956 | |
5964b200 AS |
1957 | int bpf_arch_text_poke(void *ip, enum bpf_text_poke_type t, |
1958 | void *addr1, void *addr2); | |
1959 | ||
eae2e83e | 1960 | struct btf_id_set; |
2af30f11 | 1961 | bool btf_id_set_contains(const struct btf_id_set *set, u32 id); |
eae2e83e | 1962 | |
99c55f7d | 1963 | #endif /* _LINUX_BPF_H */ |