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