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> |
48edc1f7 RG |
23 | #include <linux/sched/mm.h> |
24 | #include <linux/slab.h> | |
99c55f7d | 25 | |
cae1927c | 26 | struct bpf_verifier_env; |
9e15db66 | 27 | struct bpf_verifier_log; |
3b1efb19 | 28 | struct perf_event; |
174a79ff | 29 | struct bpf_prog; |
da765a2f | 30 | struct bpf_prog_aux; |
99c55f7d | 31 | struct bpf_map; |
4f738adb | 32 | struct sock; |
a26ca7c9 | 33 | struct seq_file; |
1b2b234b | 34 | struct btf; |
e8d2bec0 | 35 | struct btf_type; |
3dec541b | 36 | struct exception_table_entry; |
ae24345d | 37 | struct seq_operations; |
f9c79272 | 38 | struct bpf_iter_aux_info; |
f836a56e KS |
39 | struct bpf_local_storage; |
40 | struct bpf_local_storage_map; | |
36e68442 | 41 | struct kobject; |
48edc1f7 | 42 | struct mem_cgroup; |
99c55f7d | 43 | |
1b9ed84e QM |
44 | extern struct idr btf_idr; |
45 | extern spinlock_t btf_idr_lock; | |
36e68442 | 46 | extern struct kobject *btf_kobj; |
1b9ed84e | 47 | |
f9c79272 YS |
48 | typedef int (*bpf_iter_init_seq_priv_t)(void *private_data, |
49 | struct bpf_iter_aux_info *aux); | |
14fc6bd6 YS |
50 | typedef void (*bpf_iter_fini_seq_priv_t)(void *private_data); |
51 | struct bpf_iter_seq_info { | |
52 | const struct seq_operations *seq_ops; | |
53 | bpf_iter_init_seq_priv_t init_seq_private; | |
54 | bpf_iter_fini_seq_priv_t fini_seq_private; | |
55 | u32 seq_priv_size; | |
56 | }; | |
57 | ||
99c55f7d AS |
58 | /* map is generic key/value storage optionally accesible by eBPF programs */ |
59 | struct bpf_map_ops { | |
60 | /* funcs callable from userspace (via syscall) */ | |
1110f3a9 | 61 | int (*map_alloc_check)(union bpf_attr *attr); |
99c55f7d | 62 | struct bpf_map *(*map_alloc)(union bpf_attr *attr); |
61d1b6a4 DB |
63 | void (*map_release)(struct bpf_map *map, struct file *map_file); |
64 | void (*map_free)(struct bpf_map *map); | |
db20fd2b | 65 | int (*map_get_next_key)(struct bpf_map *map, void *key, void *next_key); |
ba6b8de4 | 66 | void (*map_release_uref)(struct bpf_map *map); |
c6110222 | 67 | void *(*map_lookup_elem_sys_only)(struct bpf_map *map, void *key); |
cb4d03ab BV |
68 | int (*map_lookup_batch)(struct bpf_map *map, const union bpf_attr *attr, |
69 | union bpf_attr __user *uattr); | |
05799638 YS |
70 | int (*map_lookup_and_delete_batch)(struct bpf_map *map, |
71 | const union bpf_attr *attr, | |
72 | union bpf_attr __user *uattr); | |
aa2e93b8 BV |
73 | int (*map_update_batch)(struct bpf_map *map, const union bpf_attr *attr, |
74 | union bpf_attr __user *uattr); | |
75 | int (*map_delete_batch)(struct bpf_map *map, const union bpf_attr *attr, | |
76 | union bpf_attr __user *uattr); | |
db20fd2b AS |
77 | |
78 | /* funcs callable from userspace and from eBPF programs */ | |
79 | void *(*map_lookup_elem)(struct bpf_map *map, void *key); | |
3274f520 | 80 | int (*map_update_elem)(struct bpf_map *map, void *key, void *value, u64 flags); |
db20fd2b | 81 | int (*map_delete_elem)(struct bpf_map *map, void *key); |
f1a2e44a MV |
82 | int (*map_push_elem)(struct bpf_map *map, void *value, u64 flags); |
83 | int (*map_pop_elem)(struct bpf_map *map, void *value); | |
84 | int (*map_peek_elem)(struct bpf_map *map, void *value); | |
2a36f0b9 WN |
85 | |
86 | /* funcs called by prog_array and perf_event_array map */ | |
d056a788 DB |
87 | void *(*map_fd_get_ptr)(struct bpf_map *map, struct file *map_file, |
88 | int fd); | |
89 | void (*map_fd_put_ptr)(void *ptr); | |
4a8f87e6 | 90 | int (*map_gen_lookup)(struct bpf_map *map, struct bpf_insn *insn_buf); |
14dc6f04 | 91 | u32 (*map_fd_sys_lookup_elem)(void *ptr); |
a26ca7c9 MKL |
92 | void (*map_seq_show_elem)(struct bpf_map *map, void *key, |
93 | struct seq_file *m); | |
e8d2bec0 | 94 | int (*map_check_btf)(const struct bpf_map *map, |
1b2b234b | 95 | const struct btf *btf, |
e8d2bec0 DB |
96 | const struct btf_type *key_type, |
97 | const struct btf_type *value_type); | |
d8eca5bb | 98 | |
da765a2f DB |
99 | /* Prog poke tracking helpers. */ |
100 | int (*map_poke_track)(struct bpf_map *map, struct bpf_prog_aux *aux); | |
101 | void (*map_poke_untrack)(struct bpf_map *map, struct bpf_prog_aux *aux); | |
102 | void (*map_poke_run)(struct bpf_map *map, u32 key, struct bpf_prog *old, | |
103 | struct bpf_prog *new); | |
104 | ||
d8eca5bb DB |
105 | /* Direct value access helpers. */ |
106 | int (*map_direct_value_addr)(const struct bpf_map *map, | |
107 | u64 *imm, u32 off); | |
108 | int (*map_direct_value_meta)(const struct bpf_map *map, | |
109 | u64 imm, u32 *off); | |
fc970227 | 110 | int (*map_mmap)(struct bpf_map *map, struct vm_area_struct *vma); |
457f4436 AN |
111 | __poll_t (*map_poll)(struct bpf_map *map, struct file *filp, |
112 | struct poll_table_struct *pts); | |
41c48f3a | 113 | |
f836a56e KS |
114 | /* Functions called by bpf_local_storage maps */ |
115 | int (*map_local_storage_charge)(struct bpf_local_storage_map *smap, | |
116 | void *owner, u32 size); | |
117 | void (*map_local_storage_uncharge)(struct bpf_local_storage_map *smap, | |
118 | void *owner, u32 size); | |
119 | struct bpf_local_storage __rcu ** (*map_owner_storage_ptr)(void *owner); | |
f4d05259 MKL |
120 | |
121 | /* map_meta_equal must be implemented for maps that can be | |
122 | * used as an inner map. It is a runtime check to ensure | |
123 | * an inner map can be inserted to an outer map. | |
124 | * | |
125 | * Some properties of the inner map has been used during the | |
126 | * verification time. When inserting an inner map at the runtime, | |
127 | * map_meta_equal has to ensure the inserting map has the same | |
128 | * properties that the verifier has used earlier. | |
129 | */ | |
130 | bool (*map_meta_equal)(const struct bpf_map *meta0, | |
131 | const struct bpf_map *meta1); | |
132 | ||
41c48f3a AI |
133 | /* BTF name and id of struct allocated by map_alloc */ |
134 | const char * const map_btf_name; | |
135 | int *map_btf_id; | |
a5cbe05a YS |
136 | |
137 | /* bpf_iter info used to open a seq_file */ | |
138 | const struct bpf_iter_seq_info *iter_seq_info; | |
99c55f7d AS |
139 | }; |
140 | ||
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; |
48edc1f7 RG |
161 | #ifdef CONFIG_MEMCG_KMEM |
162 | struct mem_cgroup *memcg; | |
163 | #endif | |
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; | |
22dc4a0f AN |
424 | struct { |
425 | struct btf *btf; | |
426 | u32 btf_id; | |
427 | }; | |
9e15db66 AS |
428 | }; |
429 | struct bpf_verifier_log *log; /* for verbose logs */ | |
23994631 YS |
430 | }; |
431 | ||
f96da094 DB |
432 | static inline void |
433 | bpf_ctx_record_field_size(struct bpf_insn_access_aux *aux, u32 size) | |
434 | { | |
435 | aux->ctx_field_size = size; | |
436 | } | |
437 | ||
7de16e3a JK |
438 | struct bpf_prog_ops { |
439 | int (*test_run)(struct bpf_prog *prog, const union bpf_attr *kattr, | |
440 | union bpf_attr __user *uattr); | |
441 | }; | |
442 | ||
09756af4 AS |
443 | struct bpf_verifier_ops { |
444 | /* return eBPF function prototype for verification */ | |
5e43f899 AI |
445 | const struct bpf_func_proto * |
446 | (*get_func_proto)(enum bpf_func_id func_id, | |
447 | const struct bpf_prog *prog); | |
17a52670 AS |
448 | |
449 | /* return true if 'size' wide access at offset 'off' within bpf_context | |
450 | * with 'type' (read or write) is allowed | |
451 | */ | |
19de99f7 | 452 | bool (*is_valid_access)(int off, int size, enum bpf_access_type type, |
5e43f899 | 453 | const struct bpf_prog *prog, |
23994631 | 454 | struct bpf_insn_access_aux *info); |
36bbef52 DB |
455 | int (*gen_prologue)(struct bpf_insn *insn, bool direct_write, |
456 | const struct bpf_prog *prog); | |
e0cea7ce DB |
457 | int (*gen_ld_abs)(const struct bpf_insn *orig, |
458 | struct bpf_insn *insn_buf); | |
6b8cc1d1 DB |
459 | u32 (*convert_ctx_access)(enum bpf_access_type type, |
460 | const struct bpf_insn *src, | |
461 | struct bpf_insn *dst, | |
f96da094 | 462 | struct bpf_prog *prog, u32 *target_size); |
27ae7997 | 463 | int (*btf_struct_access)(struct bpf_verifier_log *log, |
22dc4a0f | 464 | const struct btf *btf, |
27ae7997 MKL |
465 | const struct btf_type *t, int off, int size, |
466 | enum bpf_access_type atype, | |
467 | u32 *next_btf_id); | |
09756af4 AS |
468 | }; |
469 | ||
cae1927c | 470 | struct bpf_prog_offload_ops { |
08ca90af | 471 | /* verifier basic callbacks */ |
cae1927c JK |
472 | int (*insn_hook)(struct bpf_verifier_env *env, |
473 | int insn_idx, int prev_insn_idx); | |
c941ce9c | 474 | int (*finalize)(struct bpf_verifier_env *env); |
08ca90af JK |
475 | /* verifier optimization callbacks (called after .finalize) */ |
476 | int (*replace_insn)(struct bpf_verifier_env *env, u32 off, | |
477 | struct bpf_insn *insn); | |
478 | int (*remove_insns)(struct bpf_verifier_env *env, u32 off, u32 cnt); | |
479 | /* program management callbacks */ | |
16a8cb5c QM |
480 | int (*prepare)(struct bpf_prog *prog); |
481 | int (*translate)(struct bpf_prog *prog); | |
eb911947 | 482 | void (*destroy)(struct bpf_prog *prog); |
cae1927c JK |
483 | }; |
484 | ||
0a9c1991 | 485 | struct bpf_prog_offload { |
ab3f0063 JK |
486 | struct bpf_prog *prog; |
487 | struct net_device *netdev; | |
341b3e7b | 488 | struct bpf_offload_dev *offdev; |
ab3f0063 JK |
489 | void *dev_priv; |
490 | struct list_head offloads; | |
491 | bool dev_state; | |
08ca90af | 492 | bool opt_failed; |
fcfb126d JW |
493 | void *jited_image; |
494 | u32 jited_len; | |
ab3f0063 JK |
495 | }; |
496 | ||
8bad74f9 RG |
497 | enum bpf_cgroup_storage_type { |
498 | BPF_CGROUP_STORAGE_SHARED, | |
b741f163 | 499 | BPF_CGROUP_STORAGE_PERCPU, |
8bad74f9 RG |
500 | __BPF_CGROUP_STORAGE_MAX |
501 | }; | |
502 | ||
503 | #define MAX_BPF_CGROUP_STORAGE_TYPE __BPF_CGROUP_STORAGE_MAX | |
504 | ||
f1b9509c AS |
505 | /* The longest tracepoint has 12 args. |
506 | * See include/trace/bpf_probe.h | |
507 | */ | |
508 | #define MAX_BPF_FUNC_ARGS 12 | |
509 | ||
492ecee8 AS |
510 | struct bpf_prog_stats { |
511 | u64 cnt; | |
512 | u64 nsecs; | |
513 | struct u64_stats_sync syncp; | |
84a081f6 | 514 | } __aligned(2 * sizeof(u64)); |
492ecee8 | 515 | |
fec56f58 AS |
516 | struct btf_func_model { |
517 | u8 ret_size; | |
518 | u8 nr_args; | |
519 | u8 arg_size[MAX_BPF_FUNC_ARGS]; | |
520 | }; | |
521 | ||
522 | /* Restore arguments before returning from trampoline to let original function | |
523 | * continue executing. This flag is used for fentry progs when there are no | |
524 | * fexit progs. | |
525 | */ | |
526 | #define BPF_TRAMP_F_RESTORE_REGS BIT(0) | |
527 | /* Call original function after fentry progs, but before fexit progs. | |
528 | * Makes sense for fentry/fexit, normal calls and indirect calls. | |
529 | */ | |
530 | #define BPF_TRAMP_F_CALL_ORIG BIT(1) | |
531 | /* Skip current frame and return to parent. Makes sense for fentry/fexit | |
532 | * programs only. Should not be used with normal calls and indirect calls. | |
533 | */ | |
534 | #define BPF_TRAMP_F_SKIP_FRAME BIT(2) | |
535 | ||
88fd9e53 KS |
536 | /* Each call __bpf_prog_enter + call bpf_func + call __bpf_prog_exit is ~50 |
537 | * bytes on x86. Pick a number to fit into BPF_IMAGE_SIZE / 2 | |
538 | */ | |
539 | #define BPF_MAX_TRAMP_PROGS 40 | |
540 | ||
541 | struct bpf_tramp_progs { | |
542 | struct bpf_prog *progs[BPF_MAX_TRAMP_PROGS]; | |
543 | int nr_progs; | |
544 | }; | |
545 | ||
fec56f58 AS |
546 | /* Different use cases for BPF trampoline: |
547 | * 1. replace nop at the function entry (kprobe equivalent) | |
548 | * flags = BPF_TRAMP_F_RESTORE_REGS | |
549 | * fentry = a set of programs to run before returning from trampoline | |
550 | * | |
551 | * 2. replace nop at the function entry (kprobe + kretprobe equivalent) | |
552 | * flags = BPF_TRAMP_F_CALL_ORIG | BPF_TRAMP_F_SKIP_FRAME | |
553 | * orig_call = fentry_ip + MCOUNT_INSN_SIZE | |
554 | * fentry = a set of program to run before calling original function | |
555 | * fexit = a set of program to run after original function | |
556 | * | |
557 | * 3. replace direct call instruction anywhere in the function body | |
558 | * or assign a function pointer for indirect call (like tcp_congestion_ops->cong_avoid) | |
559 | * With flags = 0 | |
560 | * fentry = a set of programs to run before returning from trampoline | |
561 | * With flags = BPF_TRAMP_F_CALL_ORIG | |
562 | * orig_call = original callback addr or direct function addr | |
563 | * fentry = a set of program to run before calling original function | |
564 | * fexit = a set of program to run after original function | |
565 | */ | |
85d33df3 MKL |
566 | int arch_prepare_bpf_trampoline(void *image, void *image_end, |
567 | const struct btf_func_model *m, u32 flags, | |
88fd9e53 | 568 | struct bpf_tramp_progs *tprogs, |
fec56f58 AS |
569 | void *orig_call); |
570 | /* these two functions are called from generated trampoline */ | |
571 | u64 notrace __bpf_prog_enter(void); | |
572 | void notrace __bpf_prog_exit(struct bpf_prog *prog, u64 start); | |
1e6c62a8 AS |
573 | void notrace __bpf_prog_enter_sleepable(void); |
574 | void notrace __bpf_prog_exit_sleepable(void); | |
fec56f58 | 575 | |
535911c8 JO |
576 | struct bpf_ksym { |
577 | unsigned long start; | |
578 | unsigned long end; | |
bfea9a85 | 579 | char name[KSYM_NAME_LEN]; |
ecb60d1c | 580 | struct list_head lnode; |
ca4424c9 | 581 | struct latch_tree_node tnode; |
cbd76f8d | 582 | bool prog; |
535911c8 JO |
583 | }; |
584 | ||
fec56f58 AS |
585 | enum bpf_tramp_prog_type { |
586 | BPF_TRAMP_FENTRY, | |
587 | BPF_TRAMP_FEXIT, | |
ae240823 | 588 | BPF_TRAMP_MODIFY_RETURN, |
be8704ff AS |
589 | BPF_TRAMP_MAX, |
590 | BPF_TRAMP_REPLACE, /* more than MAX */ | |
fec56f58 AS |
591 | }; |
592 | ||
593 | struct bpf_trampoline { | |
594 | /* hlist for trampoline_table */ | |
595 | struct hlist_node hlist; | |
596 | /* serializes access to fields of this trampoline */ | |
597 | struct mutex mutex; | |
598 | refcount_t refcnt; | |
599 | u64 key; | |
600 | struct { | |
601 | struct btf_func_model model; | |
602 | void *addr; | |
b91e014f | 603 | bool ftrace_managed; |
fec56f58 | 604 | } func; |
be8704ff AS |
605 | /* if !NULL this is BPF_PROG_TYPE_EXT program that extends another BPF |
606 | * program by replacing one of its functions. func.addr is the address | |
607 | * of the function it replaced. | |
608 | */ | |
609 | struct bpf_prog *extension_prog; | |
fec56f58 AS |
610 | /* list of BPF programs using this trampoline */ |
611 | struct hlist_head progs_hlist[BPF_TRAMP_MAX]; | |
612 | /* Number of attached programs. A counter per kind. */ | |
613 | int progs_cnt[BPF_TRAMP_MAX]; | |
614 | /* Executable image of trampoline */ | |
615 | void *image; | |
616 | u64 selector; | |
a108f7dc | 617 | struct bpf_ksym ksym; |
fec56f58 | 618 | }; |
75ccbef6 | 619 | |
f7b12b6f THJ |
620 | struct bpf_attach_target_info { |
621 | struct btf_func_model fmodel; | |
622 | long tgt_addr; | |
623 | const char *tgt_name; | |
624 | const struct btf_type *tgt_type; | |
625 | }; | |
626 | ||
116eb788 | 627 | #define BPF_DISPATCHER_MAX 48 /* Fits in 2048B */ |
75ccbef6 BT |
628 | |
629 | struct bpf_dispatcher_prog { | |
630 | struct bpf_prog *prog; | |
631 | refcount_t users; | |
632 | }; | |
633 | ||
634 | struct bpf_dispatcher { | |
635 | /* dispatcher mutex */ | |
636 | struct mutex mutex; | |
637 | void *func; | |
638 | struct bpf_dispatcher_prog progs[BPF_DISPATCHER_MAX]; | |
639 | int num_progs; | |
640 | void *image; | |
641 | u32 image_off; | |
517b75e4 | 642 | struct bpf_ksym ksym; |
75ccbef6 BT |
643 | }; |
644 | ||
6a64037d | 645 | static __always_inline unsigned int bpf_dispatcher_nop_func( |
7e6897f9 BT |
646 | const void *ctx, |
647 | const struct bpf_insn *insnsi, | |
648 | unsigned int (*bpf_func)(const void *, | |
649 | const struct bpf_insn *)) | |
650 | { | |
651 | return bpf_func(ctx, insnsi); | |
652 | } | |
fec56f58 | 653 | #ifdef CONFIG_BPF_JIT |
3aac1ead THJ |
654 | int bpf_trampoline_link_prog(struct bpf_prog *prog, struct bpf_trampoline *tr); |
655 | int bpf_trampoline_unlink_prog(struct bpf_prog *prog, struct bpf_trampoline *tr); | |
f7b12b6f THJ |
656 | struct bpf_trampoline *bpf_trampoline_get(u64 key, |
657 | struct bpf_attach_target_info *tgt_info); | |
fec56f58 | 658 | void bpf_trampoline_put(struct bpf_trampoline *tr); |
517b75e4 JO |
659 | #define BPF_DISPATCHER_INIT(_name) { \ |
660 | .mutex = __MUTEX_INITIALIZER(_name.mutex), \ | |
661 | .func = &_name##_func, \ | |
662 | .progs = {}, \ | |
663 | .num_progs = 0, \ | |
664 | .image = NULL, \ | |
665 | .image_off = 0, \ | |
666 | .ksym = { \ | |
667 | .name = #_name, \ | |
668 | .lnode = LIST_HEAD_INIT(_name.ksym.lnode), \ | |
669 | }, \ | |
75ccbef6 BT |
670 | } |
671 | ||
672 | #define DEFINE_BPF_DISPATCHER(name) \ | |
6a64037d | 673 | noinline unsigned int bpf_dispatcher_##name##_func( \ |
75ccbef6 BT |
674 | const void *ctx, \ |
675 | const struct bpf_insn *insnsi, \ | |
676 | unsigned int (*bpf_func)(const void *, \ | |
677 | const struct bpf_insn *)) \ | |
678 | { \ | |
679 | return bpf_func(ctx, insnsi); \ | |
680 | } \ | |
6a64037d BT |
681 | EXPORT_SYMBOL(bpf_dispatcher_##name##_func); \ |
682 | struct bpf_dispatcher bpf_dispatcher_##name = \ | |
683 | BPF_DISPATCHER_INIT(bpf_dispatcher_##name); | |
75ccbef6 | 684 | #define DECLARE_BPF_DISPATCHER(name) \ |
6a64037d | 685 | unsigned int bpf_dispatcher_##name##_func( \ |
75ccbef6 BT |
686 | const void *ctx, \ |
687 | const struct bpf_insn *insnsi, \ | |
688 | unsigned int (*bpf_func)(const void *, \ | |
689 | const struct bpf_insn *)); \ | |
6a64037d BT |
690 | extern struct bpf_dispatcher bpf_dispatcher_##name; |
691 | #define BPF_DISPATCHER_FUNC(name) bpf_dispatcher_##name##_func | |
692 | #define BPF_DISPATCHER_PTR(name) (&bpf_dispatcher_##name) | |
75ccbef6 BT |
693 | void bpf_dispatcher_change_prog(struct bpf_dispatcher *d, struct bpf_prog *from, |
694 | struct bpf_prog *to); | |
dba122fb | 695 | /* Called only from JIT-enabled code, so there's no need for stubs. */ |
7ac88eba | 696 | void *bpf_jit_alloc_exec_page(void); |
a108f7dc JO |
697 | void bpf_image_ksym_add(void *data, struct bpf_ksym *ksym); |
698 | void bpf_image_ksym_del(struct bpf_ksym *ksym); | |
dba122fb JO |
699 | void bpf_ksym_add(struct bpf_ksym *ksym); |
700 | void bpf_ksym_del(struct bpf_ksym *ksym); | |
fec56f58 | 701 | #else |
3aac1ead THJ |
702 | static inline int bpf_trampoline_link_prog(struct bpf_prog *prog, |
703 | struct bpf_trampoline *tr) | |
fec56f58 AS |
704 | { |
705 | return -ENOTSUPP; | |
706 | } | |
3aac1ead THJ |
707 | static inline int bpf_trampoline_unlink_prog(struct bpf_prog *prog, |
708 | struct bpf_trampoline *tr) | |
fec56f58 AS |
709 | { |
710 | return -ENOTSUPP; | |
711 | } | |
f7b12b6f THJ |
712 | static inline struct bpf_trampoline *bpf_trampoline_get(u64 key, |
713 | struct bpf_attach_target_info *tgt_info) | |
714 | { | |
715 | return ERR_PTR(-EOPNOTSUPP); | |
716 | } | |
fec56f58 | 717 | static inline void bpf_trampoline_put(struct bpf_trampoline *tr) {} |
75ccbef6 BT |
718 | #define DEFINE_BPF_DISPATCHER(name) |
719 | #define DECLARE_BPF_DISPATCHER(name) | |
6a64037d | 720 | #define BPF_DISPATCHER_FUNC(name) bpf_dispatcher_nop_func |
75ccbef6 BT |
721 | #define BPF_DISPATCHER_PTR(name) NULL |
722 | static inline void bpf_dispatcher_change_prog(struct bpf_dispatcher *d, | |
723 | struct bpf_prog *from, | |
724 | struct bpf_prog *to) {} | |
e9b4e606 JO |
725 | static inline bool is_bpf_image_address(unsigned long address) |
726 | { | |
727 | return false; | |
728 | } | |
fec56f58 AS |
729 | #endif |
730 | ||
8c1b6e69 | 731 | struct bpf_func_info_aux { |
51c39bb1 | 732 | u16 linkage; |
8c1b6e69 AS |
733 | bool unreliable; |
734 | }; | |
735 | ||
a66886fe DB |
736 | enum bpf_jit_poke_reason { |
737 | BPF_POKE_REASON_TAIL_CALL, | |
738 | }; | |
739 | ||
740 | /* Descriptor of pokes pointing /into/ the JITed image. */ | |
741 | struct bpf_jit_poke_descriptor { | |
cf71b174 | 742 | void *tailcall_target; |
ebf7d1f5 MF |
743 | void *tailcall_bypass; |
744 | void *bypass_addr; | |
a66886fe DB |
745 | union { |
746 | struct { | |
747 | struct bpf_map *map; | |
748 | u32 key; | |
749 | } tail_call; | |
750 | }; | |
cf71b174 | 751 | bool tailcall_target_stable; |
a66886fe DB |
752 | u8 adj_off; |
753 | u16 reason; | |
a748c697 | 754 | u32 insn_idx; |
a66886fe DB |
755 | }; |
756 | ||
3c32cc1b YS |
757 | /* reg_type info for ctx arguments */ |
758 | struct bpf_ctx_arg_aux { | |
759 | u32 offset; | |
760 | enum bpf_reg_type reg_type; | |
951cf368 | 761 | u32 btf_id; |
3c32cc1b YS |
762 | }; |
763 | ||
09756af4 | 764 | struct bpf_prog_aux { |
85192dbf | 765 | atomic64_t refcnt; |
24701ece | 766 | u32 used_map_cnt; |
32bbe007 | 767 | u32 max_ctx_offset; |
e647815a | 768 | u32 max_pkt_offset; |
9df1c28b | 769 | u32 max_tp_access; |
8726679a | 770 | u32 stack_depth; |
dc4bb0e2 | 771 | u32 id; |
ba64e7d8 YS |
772 | u32 func_cnt; /* used by non-func prog as the number of func progs */ |
773 | u32 func_idx; /* 0 for non-func prog, the index in func array for func prog */ | |
ccfe29eb | 774 | u32 attach_btf_id; /* in-kernel BTF type id to attach to */ |
3c32cc1b | 775 | u32 ctx_arg_info_size; |
afbf21dc YS |
776 | u32 max_rdonly_access; |
777 | u32 max_rdwr_access; | |
22dc4a0f | 778 | struct btf *attach_btf; |
3c32cc1b | 779 | const struct bpf_ctx_arg_aux *ctx_arg_info; |
3aac1ead THJ |
780 | struct mutex dst_mutex; /* protects dst_* pointers below, *after* prog becomes visible */ |
781 | struct bpf_prog *dst_prog; | |
782 | struct bpf_trampoline *dst_trampoline; | |
4a1e7c0c THJ |
783 | enum bpf_prog_type saved_dst_prog_type; |
784 | enum bpf_attach_type saved_dst_attach_type; | |
a4b1d3c1 | 785 | bool verifier_zext; /* Zero extensions has been inserted by verifier. */ |
9a18eedb | 786 | bool offload_requested; |
38207291 | 787 | bool attach_btf_trace; /* true if attaching to BTF-enabled raw tp */ |
8c1b6e69 | 788 | bool func_proto_unreliable; |
1e6c62a8 | 789 | bool sleepable; |
ebf7d1f5 | 790 | bool tail_call_reachable; |
fec56f58 | 791 | enum bpf_tramp_prog_type trampoline_prog_type; |
fec56f58 | 792 | struct hlist_node tramp_hlist; |
38207291 MKL |
793 | /* BTF_KIND_FUNC_PROTO for valid attach_btf_id */ |
794 | const struct btf_type *attach_func_proto; | |
795 | /* function name for valid attach_btf_id */ | |
796 | const char *attach_func_name; | |
1c2a088a AS |
797 | struct bpf_prog **func; |
798 | void *jit_data; /* JIT specific data. arch dependent */ | |
a66886fe DB |
799 | struct bpf_jit_poke_descriptor *poke_tab; |
800 | u32 size_poke_tab; | |
535911c8 | 801 | struct bpf_ksym ksym; |
7de16e3a | 802 | const struct bpf_prog_ops *ops; |
09756af4 | 803 | struct bpf_map **used_maps; |
984fe94f | 804 | struct mutex used_maps_mutex; /* mutex for used_maps and used_map_cnt */ |
09756af4 | 805 | struct bpf_prog *prog; |
aaac3ba9 | 806 | struct user_struct *user; |
cb4d2b3f | 807 | u64 load_time; /* ns since boottime */ |
8bad74f9 | 808 | struct bpf_map *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE]; |
067cae47 | 809 | char name[BPF_OBJ_NAME_LEN]; |
afdb09c7 CF |
810 | #ifdef CONFIG_SECURITY |
811 | void *security; | |
812 | #endif | |
0a9c1991 | 813 | struct bpf_prog_offload *offload; |
838e9690 | 814 | struct btf *btf; |
ba64e7d8 | 815 | struct bpf_func_info *func_info; |
8c1b6e69 | 816 | struct bpf_func_info_aux *func_info_aux; |
c454a46b MKL |
817 | /* bpf_line_info loaded from userspace. linfo->insn_off |
818 | * has the xlated insn offset. | |
819 | * Both the main and sub prog share the same linfo. | |
820 | * The subprog can access its first linfo by | |
821 | * using the linfo_idx. | |
822 | */ | |
823 | struct bpf_line_info *linfo; | |
824 | /* jited_linfo is the jited addr of the linfo. It has a | |
825 | * one to one mapping to linfo: | |
826 | * jited_linfo[i] is the jited addr for the linfo[i]->insn_off. | |
827 | * Both the main and sub prog share the same jited_linfo. | |
828 | * The subprog can access its first jited_linfo by | |
829 | * using the linfo_idx. | |
830 | */ | |
831 | void **jited_linfo; | |
ba64e7d8 | 832 | u32 func_info_cnt; |
c454a46b MKL |
833 | u32 nr_linfo; |
834 | /* subprog can use linfo_idx to access its first linfo and | |
835 | * jited_linfo. | |
836 | * main prog always has linfo_idx == 0 | |
837 | */ | |
838 | u32 linfo_idx; | |
3dec541b AS |
839 | u32 num_exentries; |
840 | struct exception_table_entry *extable; | |
492ecee8 | 841 | struct bpf_prog_stats __percpu *stats; |
abf2e7d6 AS |
842 | union { |
843 | struct work_struct work; | |
844 | struct rcu_head rcu; | |
845 | }; | |
09756af4 AS |
846 | }; |
847 | ||
2beee5f5 DB |
848 | struct bpf_array_aux { |
849 | /* 'Ownership' of prog array is claimed by the first program that | |
850 | * is going to use this map or by the first program which FD is | |
851 | * stored in the map to make sure that all callers and callees have | |
852 | * the same prog type and JITed flag. | |
853 | */ | |
854 | enum bpf_prog_type type; | |
855 | bool jited; | |
da765a2f DB |
856 | /* Programs with direct jumps into programs part of this array. */ |
857 | struct list_head poke_progs; | |
858 | struct bpf_map *map; | |
859 | struct mutex poke_mutex; | |
860 | struct work_struct work; | |
2beee5f5 DB |
861 | }; |
862 | ||
6cc7d1e8 AN |
863 | struct bpf_link { |
864 | atomic64_t refcnt; | |
865 | u32 id; | |
866 | enum bpf_link_type type; | |
867 | const struct bpf_link_ops *ops; | |
868 | struct bpf_prog *prog; | |
869 | struct work_struct work; | |
870 | }; | |
871 | ||
872 | struct bpf_link_ops { | |
873 | void (*release)(struct bpf_link *link); | |
874 | void (*dealloc)(struct bpf_link *link); | |
73b11c2a | 875 | int (*detach)(struct bpf_link *link); |
6cc7d1e8 AN |
876 | int (*update_prog)(struct bpf_link *link, struct bpf_prog *new_prog, |
877 | struct bpf_prog *old_prog); | |
878 | void (*show_fdinfo)(const struct bpf_link *link, struct seq_file *seq); | |
879 | int (*fill_link_info)(const struct bpf_link *link, | |
880 | struct bpf_link_info *info); | |
881 | }; | |
882 | ||
883 | struct bpf_link_primer { | |
884 | struct bpf_link *link; | |
885 | struct file *file; | |
886 | int fd; | |
887 | u32 id; | |
888 | }; | |
889 | ||
85d33df3 | 890 | struct bpf_struct_ops_value; |
27ae7997 MKL |
891 | struct btf_type; |
892 | struct btf_member; | |
893 | ||
894 | #define BPF_STRUCT_OPS_MAX_NR_MEMBERS 64 | |
895 | struct bpf_struct_ops { | |
896 | const struct bpf_verifier_ops *verifier_ops; | |
897 | int (*init)(struct btf *btf); | |
898 | int (*check_member)(const struct btf_type *t, | |
899 | const struct btf_member *member); | |
85d33df3 MKL |
900 | int (*init_member)(const struct btf_type *t, |
901 | const struct btf_member *member, | |
902 | void *kdata, const void *udata); | |
903 | int (*reg)(void *kdata); | |
904 | void (*unreg)(void *kdata); | |
27ae7997 | 905 | const struct btf_type *type; |
85d33df3 | 906 | const struct btf_type *value_type; |
27ae7997 MKL |
907 | const char *name; |
908 | struct btf_func_model func_models[BPF_STRUCT_OPS_MAX_NR_MEMBERS]; | |
909 | u32 type_id; | |
85d33df3 | 910 | u32 value_id; |
27ae7997 MKL |
911 | }; |
912 | ||
913 | #if defined(CONFIG_BPF_JIT) && defined(CONFIG_BPF_SYSCALL) | |
85d33df3 | 914 | #define BPF_MODULE_OWNER ((void *)((0xeB9FUL << 2) + POISON_POINTER_DELTA)) |
27ae7997 | 915 | const struct bpf_struct_ops *bpf_struct_ops_find(u32 type_id); |
d3e42bb0 | 916 | void bpf_struct_ops_init(struct btf *btf, struct bpf_verifier_log *log); |
85d33df3 MKL |
917 | bool bpf_struct_ops_get(const void *kdata); |
918 | void bpf_struct_ops_put(const void *kdata); | |
919 | int bpf_struct_ops_map_sys_lookup_elem(struct bpf_map *map, void *key, | |
920 | void *value); | |
921 | static inline bool bpf_try_module_get(const void *data, struct module *owner) | |
922 | { | |
923 | if (owner == BPF_MODULE_OWNER) | |
924 | return bpf_struct_ops_get(data); | |
925 | else | |
926 | return try_module_get(owner); | |
927 | } | |
928 | static inline void bpf_module_put(const void *data, struct module *owner) | |
929 | { | |
930 | if (owner == BPF_MODULE_OWNER) | |
931 | bpf_struct_ops_put(data); | |
932 | else | |
933 | module_put(owner); | |
934 | } | |
27ae7997 MKL |
935 | #else |
936 | static inline const struct bpf_struct_ops *bpf_struct_ops_find(u32 type_id) | |
937 | { | |
938 | return NULL; | |
939 | } | |
d3e42bb0 MKL |
940 | static inline void bpf_struct_ops_init(struct btf *btf, |
941 | struct bpf_verifier_log *log) | |
942 | { | |
943 | } | |
85d33df3 MKL |
944 | static inline bool bpf_try_module_get(const void *data, struct module *owner) |
945 | { | |
946 | return try_module_get(owner); | |
947 | } | |
948 | static inline void bpf_module_put(const void *data, struct module *owner) | |
949 | { | |
950 | module_put(owner); | |
951 | } | |
952 | static inline int bpf_struct_ops_map_sys_lookup_elem(struct bpf_map *map, | |
953 | void *key, | |
954 | void *value) | |
955 | { | |
956 | return -EINVAL; | |
957 | } | |
27ae7997 MKL |
958 | #endif |
959 | ||
04fd61ab AS |
960 | struct bpf_array { |
961 | struct bpf_map map; | |
962 | u32 elem_size; | |
b2157399 | 963 | u32 index_mask; |
2beee5f5 | 964 | struct bpf_array_aux *aux; |
04fd61ab AS |
965 | union { |
966 | char value[0] __aligned(8); | |
2a36f0b9 | 967 | void *ptrs[0] __aligned(8); |
a10423b8 | 968 | void __percpu *pptrs[0] __aligned(8); |
04fd61ab AS |
969 | }; |
970 | }; | |
3b1efb19 | 971 | |
c04c0d2b | 972 | #define BPF_COMPLEXITY_LIMIT_INSNS 1000000 /* yes. 1M insns */ |
04fd61ab AS |
973 | #define MAX_TAIL_CALL_CNT 32 |
974 | ||
591fe988 DB |
975 | #define BPF_F_ACCESS_MASK (BPF_F_RDONLY | \ |
976 | BPF_F_RDONLY_PROG | \ | |
977 | BPF_F_WRONLY | \ | |
978 | BPF_F_WRONLY_PROG) | |
979 | ||
980 | #define BPF_MAP_CAN_READ BIT(0) | |
981 | #define BPF_MAP_CAN_WRITE BIT(1) | |
982 | ||
983 | static inline u32 bpf_map_flags_to_cap(struct bpf_map *map) | |
984 | { | |
985 | u32 access_flags = map->map_flags & (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG); | |
986 | ||
987 | /* Combination of BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG is | |
988 | * not possible. | |
989 | */ | |
990 | if (access_flags & BPF_F_RDONLY_PROG) | |
991 | return BPF_MAP_CAN_READ; | |
992 | else if (access_flags & BPF_F_WRONLY_PROG) | |
993 | return BPF_MAP_CAN_WRITE; | |
994 | else | |
995 | return BPF_MAP_CAN_READ | BPF_MAP_CAN_WRITE; | |
996 | } | |
997 | ||
998 | static inline bool bpf_map_flags_access_ok(u32 access_flags) | |
999 | { | |
1000 | return (access_flags & (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG)) != | |
1001 | (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG); | |
1002 | } | |
1003 | ||
3b1efb19 DB |
1004 | struct bpf_event_entry { |
1005 | struct perf_event *event; | |
1006 | struct file *perf_file; | |
1007 | struct file *map_file; | |
1008 | struct rcu_head rcu; | |
1009 | }; | |
1010 | ||
04fd61ab | 1011 | bool bpf_prog_array_compatible(struct bpf_array *array, const struct bpf_prog *fp); |
f1f7714e | 1012 | int bpf_prog_calc_tag(struct bpf_prog *fp); |
bd570ff9 | 1013 | |
0756ea3e | 1014 | const struct bpf_func_proto *bpf_get_trace_printk_proto(void); |
555c8a86 DB |
1015 | |
1016 | typedef unsigned long (*bpf_ctx_copy_t)(void *dst, const void *src, | |
aa7145c1 | 1017 | unsigned long off, unsigned long len); |
c64b7983 JS |
1018 | typedef u32 (*bpf_convert_ctx_access_t)(enum bpf_access_type type, |
1019 | const struct bpf_insn *src, | |
1020 | struct bpf_insn *dst, | |
1021 | struct bpf_prog *prog, | |
1022 | u32 *target_size); | |
555c8a86 DB |
1023 | |
1024 | u64 bpf_event_output(struct bpf_map *map, u64 flags, void *meta, u64 meta_size, | |
1025 | void *ctx, u64 ctx_size, bpf_ctx_copy_t ctx_copy); | |
04fd61ab | 1026 | |
324bda9e AS |
1027 | /* an array of programs to be executed under rcu_lock. |
1028 | * | |
1029 | * Typical usage: | |
1030 | * ret = BPF_PROG_RUN_ARRAY(&bpf_prog_array, ctx, BPF_PROG_RUN); | |
1031 | * | |
1032 | * the structure returned by bpf_prog_array_alloc() should be populated | |
1033 | * with program pointers and the last pointer must be NULL. | |
1034 | * The user has to keep refcnt on the program and make sure the program | |
1035 | * is removed from the array before bpf_prog_put(). | |
1036 | * The 'struct bpf_prog_array *' should only be replaced with xchg() | |
1037 | * since other cpus are walking the array of pointers in parallel. | |
1038 | */ | |
394e40a2 RG |
1039 | struct bpf_prog_array_item { |
1040 | struct bpf_prog *prog; | |
8bad74f9 | 1041 | struct bpf_cgroup_storage *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE]; |
394e40a2 RG |
1042 | }; |
1043 | ||
324bda9e AS |
1044 | struct bpf_prog_array { |
1045 | struct rcu_head rcu; | |
d7f10df8 | 1046 | struct bpf_prog_array_item items[]; |
324bda9e AS |
1047 | }; |
1048 | ||
d29ab6e1 | 1049 | struct bpf_prog_array *bpf_prog_array_alloc(u32 prog_cnt, gfp_t flags); |
54e9c9d4 SF |
1050 | void bpf_prog_array_free(struct bpf_prog_array *progs); |
1051 | int bpf_prog_array_length(struct bpf_prog_array *progs); | |
0d01da6a | 1052 | bool bpf_prog_array_is_empty(struct bpf_prog_array *array); |
54e9c9d4 | 1053 | int bpf_prog_array_copy_to_user(struct bpf_prog_array *progs, |
468e2f64 | 1054 | __u32 __user *prog_ids, u32 cnt); |
324bda9e | 1055 | |
54e9c9d4 | 1056 | void bpf_prog_array_delete_safe(struct bpf_prog_array *progs, |
e87c6bc3 | 1057 | struct bpf_prog *old_prog); |
ce3aa9cc JS |
1058 | int bpf_prog_array_delete_safe_at(struct bpf_prog_array *array, int index); |
1059 | int bpf_prog_array_update_at(struct bpf_prog_array *array, int index, | |
1060 | struct bpf_prog *prog); | |
54e9c9d4 | 1061 | int bpf_prog_array_copy_info(struct bpf_prog_array *array, |
3a38bb98 YS |
1062 | u32 *prog_ids, u32 request_cnt, |
1063 | u32 *prog_cnt); | |
54e9c9d4 | 1064 | int bpf_prog_array_copy(struct bpf_prog_array *old_array, |
e87c6bc3 YS |
1065 | struct bpf_prog *exclude_prog, |
1066 | struct bpf_prog *include_prog, | |
1067 | struct bpf_prog_array **new_array); | |
1068 | ||
1069 | #define __BPF_PROG_RUN_ARRAY(array, ctx, func, check_non_null) \ | |
324bda9e | 1070 | ({ \ |
394e40a2 RG |
1071 | struct bpf_prog_array_item *_item; \ |
1072 | struct bpf_prog *_prog; \ | |
e87c6bc3 | 1073 | struct bpf_prog_array *_array; \ |
324bda9e | 1074 | u32 _ret = 1; \ |
2a916f2f | 1075 | migrate_disable(); \ |
324bda9e | 1076 | rcu_read_lock(); \ |
e87c6bc3 YS |
1077 | _array = rcu_dereference(array); \ |
1078 | if (unlikely(check_non_null && !_array))\ | |
1079 | goto _out; \ | |
394e40a2 RG |
1080 | _item = &_array->items[0]; \ |
1081 | while ((_prog = READ_ONCE(_item->prog))) { \ | |
1082 | bpf_cgroup_storage_set(_item->cgroup_storage); \ | |
1083 | _ret &= func(_prog, ctx); \ | |
1084 | _item++; \ | |
e87c6bc3 YS |
1085 | } \ |
1086 | _out: \ | |
324bda9e | 1087 | rcu_read_unlock(); \ |
2a916f2f | 1088 | migrate_enable(); \ |
324bda9e AS |
1089 | _ret; \ |
1090 | }) | |
1091 | ||
1f52f6c0 | 1092 | /* To be used by __cgroup_bpf_run_filter_skb for EGRESS BPF progs |
1093 | * so BPF programs can request cwr for TCP packets. | |
1094 | * | |
1095 | * Current cgroup skb programs can only return 0 or 1 (0 to drop the | |
1096 | * packet. This macro changes the behavior so the low order bit | |
1097 | * indicates whether the packet should be dropped (0) or not (1) | |
1098 | * and the next bit is a congestion notification bit. This could be | |
1099 | * used by TCP to call tcp_enter_cwr() | |
1100 | * | |
1101 | * Hence, new allowed return values of CGROUP EGRESS BPF programs are: | |
1102 | * 0: drop packet | |
1103 | * 1: keep packet | |
1104 | * 2: drop packet and cn | |
1105 | * 3: keep packet and cn | |
1106 | * | |
1107 | * This macro then converts it to one of the NET_XMIT or an error | |
1108 | * code that is then interpreted as drop packet (and no cn): | |
1109 | * 0: NET_XMIT_SUCCESS skb should be transmitted | |
1110 | * 1: NET_XMIT_DROP skb should be dropped and cn | |
1111 | * 2: NET_XMIT_CN skb should be transmitted and cn | |
1112 | * 3: -EPERM skb should be dropped | |
1113 | */ | |
1114 | #define BPF_PROG_CGROUP_INET_EGRESS_RUN_ARRAY(array, ctx, func) \ | |
1115 | ({ \ | |
1116 | struct bpf_prog_array_item *_item; \ | |
1117 | struct bpf_prog *_prog; \ | |
1118 | struct bpf_prog_array *_array; \ | |
1119 | u32 ret; \ | |
1120 | u32 _ret = 1; \ | |
1121 | u32 _cn = 0; \ | |
2a916f2f | 1122 | migrate_disable(); \ |
1f52f6c0 | 1123 | rcu_read_lock(); \ |
1124 | _array = rcu_dereference(array); \ | |
1125 | _item = &_array->items[0]; \ | |
1126 | while ((_prog = READ_ONCE(_item->prog))) { \ | |
1127 | bpf_cgroup_storage_set(_item->cgroup_storage); \ | |
1128 | ret = func(_prog, ctx); \ | |
1129 | _ret &= (ret & 1); \ | |
1130 | _cn |= (ret & 2); \ | |
1131 | _item++; \ | |
1132 | } \ | |
1133 | rcu_read_unlock(); \ | |
2a916f2f | 1134 | migrate_enable(); \ |
1f52f6c0 | 1135 | if (_ret) \ |
1136 | _ret = (_cn ? NET_XMIT_CN : NET_XMIT_SUCCESS); \ | |
1137 | else \ | |
1138 | _ret = (_cn ? NET_XMIT_DROP : -EPERM); \ | |
1139 | _ret; \ | |
1140 | }) | |
1141 | ||
e87c6bc3 YS |
1142 | #define BPF_PROG_RUN_ARRAY(array, ctx, func) \ |
1143 | __BPF_PROG_RUN_ARRAY(array, ctx, func, false) | |
1144 | ||
1145 | #define BPF_PROG_RUN_ARRAY_CHECK(array, ctx, func) \ | |
1146 | __BPF_PROG_RUN_ARRAY(array, ctx, func, true) | |
1147 | ||
89aa0758 | 1148 | #ifdef CONFIG_BPF_SYSCALL |
b121d1e7 | 1149 | DECLARE_PER_CPU(int, bpf_prog_active); |
d46edd67 | 1150 | extern struct mutex bpf_stats_enabled_mutex; |
b121d1e7 | 1151 | |
c518cfa0 TG |
1152 | /* |
1153 | * Block execution of BPF programs attached to instrumentation (perf, | |
1154 | * kprobes, tracepoints) to prevent deadlocks on map operations as any of | |
1155 | * these events can happen inside a region which holds a map bucket lock | |
1156 | * and can deadlock on it. | |
1157 | * | |
1158 | * Use the preemption safe inc/dec variants on RT because migrate disable | |
1159 | * is preemptible on RT and preemption in the middle of the RMW operation | |
1160 | * might lead to inconsistent state. Use the raw variants for non RT | |
1161 | * kernels as migrate_disable() maps to preempt_disable() so the slightly | |
1162 | * more expensive save operation can be avoided. | |
1163 | */ | |
1164 | static inline void bpf_disable_instrumentation(void) | |
1165 | { | |
1166 | migrate_disable(); | |
1167 | if (IS_ENABLED(CONFIG_PREEMPT_RT)) | |
1168 | this_cpu_inc(bpf_prog_active); | |
1169 | else | |
1170 | __this_cpu_inc(bpf_prog_active); | |
1171 | } | |
1172 | ||
1173 | static inline void bpf_enable_instrumentation(void) | |
1174 | { | |
1175 | if (IS_ENABLED(CONFIG_PREEMPT_RT)) | |
1176 | this_cpu_dec(bpf_prog_active); | |
1177 | else | |
1178 | __this_cpu_dec(bpf_prog_active); | |
1179 | migrate_enable(); | |
1180 | } | |
1181 | ||
f66e448c CF |
1182 | extern const struct file_operations bpf_map_fops; |
1183 | extern const struct file_operations bpf_prog_fops; | |
367ec3e4 | 1184 | extern const struct file_operations bpf_iter_fops; |
f66e448c | 1185 | |
91cc1a99 | 1186 | #define BPF_PROG_TYPE(_id, _name, prog_ctx_type, kern_ctx_type) \ |
7de16e3a JK |
1187 | extern const struct bpf_prog_ops _name ## _prog_ops; \ |
1188 | extern const struct bpf_verifier_ops _name ## _verifier_ops; | |
40077e0c JB |
1189 | #define BPF_MAP_TYPE(_id, _ops) \ |
1190 | extern const struct bpf_map_ops _ops; | |
f2e10bff | 1191 | #define BPF_LINK_TYPE(_id, _name) |
be9370a7 JB |
1192 | #include <linux/bpf_types.h> |
1193 | #undef BPF_PROG_TYPE | |
40077e0c | 1194 | #undef BPF_MAP_TYPE |
f2e10bff | 1195 | #undef BPF_LINK_TYPE |
0fc174de | 1196 | |
ab3f0063 | 1197 | extern const struct bpf_prog_ops bpf_offload_prog_ops; |
4f9218aa JK |
1198 | extern const struct bpf_verifier_ops tc_cls_act_analyzer_ops; |
1199 | extern const struct bpf_verifier_ops xdp_analyzer_ops; | |
1200 | ||
0fc174de | 1201 | struct bpf_prog *bpf_prog_get(u32 ufd); |
248f346f | 1202 | struct bpf_prog *bpf_prog_get_type_dev(u32 ufd, enum bpf_prog_type type, |
288b3de5 | 1203 | bool attach_drv); |
85192dbf | 1204 | void bpf_prog_add(struct bpf_prog *prog, int i); |
c540594f | 1205 | void bpf_prog_sub(struct bpf_prog *prog, int i); |
85192dbf | 1206 | void bpf_prog_inc(struct bpf_prog *prog); |
a6f6df69 | 1207 | struct bpf_prog * __must_check bpf_prog_inc_not_zero(struct bpf_prog *prog); |
61e021f3 | 1208 | void bpf_prog_put(struct bpf_prog *prog); |
a2ea0746 DB |
1209 | void __bpf_free_used_maps(struct bpf_prog_aux *aux, |
1210 | struct bpf_map **used_maps, u32 len); | |
61e021f3 | 1211 | |
ad8ad79f | 1212 | void bpf_prog_free_id(struct bpf_prog *prog, bool do_idr_lock); |
a3884572 | 1213 | void bpf_map_free_id(struct bpf_map *map, bool do_idr_lock); |
ad8ad79f | 1214 | |
1ed4d924 | 1215 | struct bpf_map *bpf_map_get(u32 ufd); |
c9da161c | 1216 | struct bpf_map *bpf_map_get_with_uref(u32 ufd); |
c2101297 | 1217 | struct bpf_map *__bpf_map_get(struct fd f); |
1e0bd5a0 AN |
1218 | void bpf_map_inc(struct bpf_map *map); |
1219 | void bpf_map_inc_with_uref(struct bpf_map *map); | |
1220 | struct bpf_map * __must_check bpf_map_inc_not_zero(struct bpf_map *map); | |
c9da161c | 1221 | void bpf_map_put_with_uref(struct bpf_map *map); |
61e021f3 | 1222 | void bpf_map_put(struct bpf_map *map); |
196e8ca7 DB |
1223 | void *bpf_map_area_alloc(u64 size, int numa_node); |
1224 | void *bpf_map_area_mmapable_alloc(u64 size, int numa_node); | |
d407bd25 | 1225 | void bpf_map_area_free(void *base); |
bd475643 | 1226 | void bpf_map_init_from_attr(struct bpf_map *map, union bpf_attr *attr); |
cb4d03ab BV |
1227 | int generic_map_lookup_batch(struct bpf_map *map, |
1228 | const union bpf_attr *attr, | |
aa2e93b8 BV |
1229 | union bpf_attr __user *uattr); |
1230 | int generic_map_update_batch(struct bpf_map *map, | |
1231 | const union bpf_attr *attr, | |
1232 | union bpf_attr __user *uattr); | |
1233 | int generic_map_delete_batch(struct bpf_map *map, | |
1234 | const union bpf_attr *attr, | |
cb4d03ab | 1235 | union bpf_attr __user *uattr); |
6086d29d | 1236 | struct bpf_map *bpf_map_get_curr_or_next(u32 *id); |
a228a64f | 1237 | struct bpf_prog *bpf_prog_get_curr_or_next(u32 *id); |
61e021f3 | 1238 | |
48edc1f7 RG |
1239 | #ifdef CONFIG_MEMCG_KMEM |
1240 | void *bpf_map_kmalloc_node(const struct bpf_map *map, size_t size, gfp_t flags, | |
1241 | int node); | |
1242 | void *bpf_map_kzalloc(const struct bpf_map *map, size_t size, gfp_t flags); | |
1243 | void __percpu *bpf_map_alloc_percpu(const struct bpf_map *map, size_t size, | |
1244 | size_t align, gfp_t flags); | |
1245 | #else | |
1246 | static inline void * | |
1247 | bpf_map_kmalloc_node(const struct bpf_map *map, size_t size, gfp_t flags, | |
1248 | int node) | |
1249 | { | |
1250 | return kmalloc_node(size, flags, node); | |
1251 | } | |
1252 | ||
1253 | static inline void * | |
1254 | bpf_map_kzalloc(const struct bpf_map *map, size_t size, gfp_t flags) | |
1255 | { | |
1256 | return kzalloc(size, flags); | |
1257 | } | |
1258 | ||
1259 | static inline void __percpu * | |
1260 | bpf_map_alloc_percpu(const struct bpf_map *map, size_t size, size_t align, | |
1261 | gfp_t flags) | |
1262 | { | |
1263 | return __alloc_percpu_gfp(size, align, flags); | |
1264 | } | |
1265 | #endif | |
1266 | ||
1be7f75d AS |
1267 | extern int sysctl_unprivileged_bpf_disabled; |
1268 | ||
2c78ee89 AS |
1269 | static inline bool bpf_allow_ptr_leaks(void) |
1270 | { | |
1271 | return perfmon_capable(); | |
1272 | } | |
1273 | ||
41c48f3a AI |
1274 | static inline bool bpf_allow_ptr_to_map_access(void) |
1275 | { | |
1276 | return perfmon_capable(); | |
1277 | } | |
1278 | ||
2c78ee89 AS |
1279 | static inline bool bpf_bypass_spec_v1(void) |
1280 | { | |
1281 | return perfmon_capable(); | |
1282 | } | |
1283 | ||
1284 | static inline bool bpf_bypass_spec_v4(void) | |
1285 | { | |
1286 | return perfmon_capable(); | |
1287 | } | |
1288 | ||
6e71b04a | 1289 | int bpf_map_new_fd(struct bpf_map *map, int flags); |
b2197755 DB |
1290 | int bpf_prog_new_fd(struct bpf_prog *prog); |
1291 | ||
f2e10bff | 1292 | void bpf_link_init(struct bpf_link *link, enum bpf_link_type type, |
a3b80e10 AN |
1293 | const struct bpf_link_ops *ops, struct bpf_prog *prog); |
1294 | int bpf_link_prime(struct bpf_link *link, struct bpf_link_primer *primer); | |
1295 | int bpf_link_settle(struct bpf_link_primer *primer); | |
1296 | void bpf_link_cleanup(struct bpf_link_primer *primer); | |
70ed506c AN |
1297 | void bpf_link_inc(struct bpf_link *link); |
1298 | void bpf_link_put(struct bpf_link *link); | |
1299 | int bpf_link_new_fd(struct bpf_link *link); | |
babf3164 | 1300 | struct file *bpf_link_new_file(struct bpf_link *link, int *reserved_fd); |
70ed506c AN |
1301 | struct bpf_link *bpf_link_get_from_fd(u32 ufd); |
1302 | ||
b2197755 | 1303 | int bpf_obj_pin_user(u32 ufd, const char __user *pathname); |
6e71b04a | 1304 | int bpf_obj_get_user(const char __user *pathname, int flags); |
b2197755 | 1305 | |
21aef70e | 1306 | #define BPF_ITER_FUNC_PREFIX "bpf_iter_" |
e5158d98 | 1307 | #define DEFINE_BPF_ITER_FUNC(target, args...) \ |
21aef70e YS |
1308 | extern int bpf_iter_ ## target(args); \ |
1309 | int __init bpf_iter_ ## target(args) { return 0; } | |
15d83c4d | 1310 | |
f9c79272 | 1311 | struct bpf_iter_aux_info { |
a5cbe05a | 1312 | struct bpf_map *map; |
f9c79272 YS |
1313 | }; |
1314 | ||
5e7b3020 YS |
1315 | typedef int (*bpf_iter_attach_target_t)(struct bpf_prog *prog, |
1316 | union bpf_iter_link_info *linfo, | |
1317 | struct bpf_iter_aux_info *aux); | |
1318 | typedef void (*bpf_iter_detach_target_t)(struct bpf_iter_aux_info *aux); | |
6b0a249a YS |
1319 | typedef void (*bpf_iter_show_fdinfo_t) (const struct bpf_iter_aux_info *aux, |
1320 | struct seq_file *seq); | |
1321 | typedef int (*bpf_iter_fill_link_info_t)(const struct bpf_iter_aux_info *aux, | |
1322 | struct bpf_link_info *info); | |
a5cbe05a | 1323 | |
cf83b2d2 YS |
1324 | enum bpf_iter_feature { |
1325 | BPF_ITER_RESCHED = BIT(0), | |
1326 | }; | |
1327 | ||
3c32cc1b | 1328 | #define BPF_ITER_CTX_ARG_MAX 2 |
ae24345d YS |
1329 | struct bpf_iter_reg { |
1330 | const char *target; | |
5e7b3020 YS |
1331 | bpf_iter_attach_target_t attach_target; |
1332 | bpf_iter_detach_target_t detach_target; | |
6b0a249a YS |
1333 | bpf_iter_show_fdinfo_t show_fdinfo; |
1334 | bpf_iter_fill_link_info_t fill_link_info; | |
3c32cc1b | 1335 | u32 ctx_arg_info_size; |
cf83b2d2 | 1336 | u32 feature; |
3c32cc1b | 1337 | struct bpf_ctx_arg_aux ctx_arg_info[BPF_ITER_CTX_ARG_MAX]; |
14fc6bd6 | 1338 | const struct bpf_iter_seq_info *seq_info; |
ae24345d YS |
1339 | }; |
1340 | ||
e5158d98 YS |
1341 | struct bpf_iter_meta { |
1342 | __bpf_md_ptr(struct seq_file *, seq); | |
1343 | u64 session_id; | |
1344 | u64 seq_num; | |
1345 | }; | |
1346 | ||
a5cbe05a YS |
1347 | struct bpf_iter__bpf_map_elem { |
1348 | __bpf_md_ptr(struct bpf_iter_meta *, meta); | |
1349 | __bpf_md_ptr(struct bpf_map *, map); | |
1350 | __bpf_md_ptr(void *, key); | |
1351 | __bpf_md_ptr(void *, value); | |
1352 | }; | |
1353 | ||
15172a46 | 1354 | int bpf_iter_reg_target(const struct bpf_iter_reg *reg_info); |
ab2ee4fc | 1355 | void bpf_iter_unreg_target(const struct bpf_iter_reg *reg_info); |
15d83c4d | 1356 | bool bpf_iter_prog_supported(struct bpf_prog *prog); |
de4e05ca | 1357 | int bpf_iter_link_attach(const union bpf_attr *attr, struct bpf_prog *prog); |
ac51d99b | 1358 | int bpf_iter_new_fd(struct bpf_link *link); |
367ec3e4 | 1359 | bool bpf_link_is_iter(struct bpf_link *link); |
e5158d98 YS |
1360 | struct bpf_prog *bpf_iter_get_info(struct bpf_iter_meta *meta, bool in_stop); |
1361 | int bpf_iter_run_prog(struct bpf_prog *prog, void *ctx); | |
b76f2226 YS |
1362 | void bpf_iter_map_show_fdinfo(const struct bpf_iter_aux_info *aux, |
1363 | struct seq_file *seq); | |
1364 | int bpf_iter_map_fill_link_info(const struct bpf_iter_aux_info *aux, | |
1365 | struct bpf_link_info *info); | |
ae24345d | 1366 | |
15a07b33 AS |
1367 | int bpf_percpu_hash_copy(struct bpf_map *map, void *key, void *value); |
1368 | int bpf_percpu_array_copy(struct bpf_map *map, void *key, void *value); | |
1369 | int bpf_percpu_hash_update(struct bpf_map *map, void *key, void *value, | |
1370 | u64 flags); | |
1371 | int bpf_percpu_array_update(struct bpf_map *map, void *key, void *value, | |
1372 | u64 flags); | |
d056a788 | 1373 | |
557c0c6e | 1374 | int bpf_stackmap_copy(struct bpf_map *map, void *key, void *value); |
15a07b33 | 1375 | |
d056a788 DB |
1376 | int bpf_fd_array_map_update_elem(struct bpf_map *map, struct file *map_file, |
1377 | void *key, void *value, u64 map_flags); | |
14dc6f04 | 1378 | int bpf_fd_array_map_lookup_elem(struct bpf_map *map, void *key, u32 *value); |
bcc6b1b7 MKL |
1379 | int bpf_fd_htab_map_update_elem(struct bpf_map *map, struct file *map_file, |
1380 | void *key, void *value, u64 map_flags); | |
14dc6f04 | 1381 | int bpf_fd_htab_map_lookup_elem(struct bpf_map *map, void *key, u32 *value); |
d056a788 | 1382 | |
6e71b04a | 1383 | int bpf_get_file_flag(int flags); |
dcab51f1 MKL |
1384 | int bpf_check_uarg_tail_zero(void __user *uaddr, size_t expected_size, |
1385 | size_t actual_size); | |
6e71b04a | 1386 | |
15a07b33 AS |
1387 | /* memcpy that is used with 8-byte aligned pointers, power-of-8 size and |
1388 | * forced to use 'long' read/writes to try to atomically copy long counters. | |
1389 | * Best-effort only. No barriers here, since it _will_ race with concurrent | |
1390 | * updates from BPF programs. Called from bpf syscall and mostly used with | |
1391 | * size 8 or 16 bytes, so ask compiler to inline it. | |
1392 | */ | |
1393 | static inline void bpf_long_memcpy(void *dst, const void *src, u32 size) | |
1394 | { | |
1395 | const long *lsrc = src; | |
1396 | long *ldst = dst; | |
1397 | ||
1398 | size /= sizeof(long); | |
1399 | while (size--) | |
1400 | *ldst++ = *lsrc++; | |
1401 | } | |
1402 | ||
61e021f3 | 1403 | /* verify correctness of eBPF program */ |
838e9690 YS |
1404 | int bpf_check(struct bpf_prog **fp, union bpf_attr *attr, |
1405 | union bpf_attr __user *uattr); | |
1ea47e01 | 1406 | void bpf_patch_call_args(struct bpf_insn *insn, u32 stack_depth); |
46f55cff | 1407 | |
76654e67 AM |
1408 | struct btf *bpf_get_btf_vmlinux(void); |
1409 | ||
46f55cff | 1410 | /* Map specifics */ |
67f29e07 | 1411 | struct xdp_buff; |
6d5fc195 | 1412 | struct sk_buff; |
67f29e07 JDB |
1413 | |
1414 | struct bpf_dtab_netdev *__dev_map_lookup_elem(struct bpf_map *map, u32 key); | |
6f9d451a | 1415 | struct bpf_dtab_netdev *__dev_map_hash_lookup_elem(struct bpf_map *map, u32 key); |
1d233886 THJ |
1416 | void __dev_flush(void); |
1417 | int dev_xdp_enqueue(struct net_device *dev, struct xdp_buff *xdp, | |
1418 | struct net_device *dev_rx); | |
38edddb8 JDB |
1419 | int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp, |
1420 | struct net_device *dev_rx); | |
6d5fc195 TM |
1421 | int dev_map_generic_redirect(struct bpf_dtab_netdev *dst, struct sk_buff *skb, |
1422 | struct bpf_prog *xdp_prog); | |
fbee97fe | 1423 | bool dev_map_can_have_prog(struct bpf_map *map); |
46f55cff | 1424 | |
9c270af3 | 1425 | struct bpf_cpu_map_entry *__cpu_map_lookup_elem(struct bpf_map *map, u32 key); |
cdfafe98 | 1426 | void __cpu_map_flush(void); |
9c270af3 JDB |
1427 | int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu, struct xdp_buff *xdp, |
1428 | struct net_device *dev_rx); | |
92164774 | 1429 | bool cpu_map_prog_allowed(struct bpf_map *map); |
9c270af3 | 1430 | |
96eabe7a MKL |
1431 | /* Return map's numa specified by userspace */ |
1432 | static inline int bpf_map_attr_numa_node(const union bpf_attr *attr) | |
1433 | { | |
1434 | return (attr->map_flags & BPF_F_NUMA_NODE) ? | |
1435 | attr->numa_node : NUMA_NO_NODE; | |
1436 | } | |
1437 | ||
040ee692 | 1438 | struct bpf_prog *bpf_prog_get_type_path(const char *name, enum bpf_prog_type type); |
5dc4c4b7 | 1439 | int array_map_alloc_check(union bpf_attr *attr); |
040ee692 | 1440 | |
c695865c SF |
1441 | int bpf_prog_test_run_xdp(struct bpf_prog *prog, const union bpf_attr *kattr, |
1442 | union bpf_attr __user *uattr); | |
1443 | int bpf_prog_test_run_skb(struct bpf_prog *prog, const union bpf_attr *kattr, | |
1444 | union bpf_attr __user *uattr); | |
da00d2f1 KS |
1445 | int bpf_prog_test_run_tracing(struct bpf_prog *prog, |
1446 | const union bpf_attr *kattr, | |
1447 | union bpf_attr __user *uattr); | |
c695865c SF |
1448 | int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog, |
1449 | const union bpf_attr *kattr, | |
1450 | union bpf_attr __user *uattr); | |
1b4d60ec SL |
1451 | int bpf_prog_test_run_raw_tp(struct bpf_prog *prog, |
1452 | const union bpf_attr *kattr, | |
1453 | union bpf_attr __user *uattr); | |
9e15db66 AS |
1454 | bool btf_ctx_access(int off, int size, enum bpf_access_type type, |
1455 | const struct bpf_prog *prog, | |
1456 | struct bpf_insn_access_aux *info); | |
22dc4a0f | 1457 | int btf_struct_access(struct bpf_verifier_log *log, const struct btf *btf, |
9e15db66 AS |
1458 | const struct btf_type *t, int off, int size, |
1459 | enum bpf_access_type atype, | |
1460 | u32 *next_btf_id); | |
faaf4a79 | 1461 | bool btf_struct_ids_match(struct bpf_verifier_log *log, |
22dc4a0f AN |
1462 | const struct btf *btf, u32 id, int off, |
1463 | const struct btf *need_btf, u32 need_type_id); | |
9e15db66 | 1464 | |
fec56f58 AS |
1465 | int btf_distill_func_proto(struct bpf_verifier_log *log, |
1466 | struct btf *btf, | |
1467 | const struct btf_type *func_proto, | |
1468 | const char *func_name, | |
1469 | struct btf_func_model *m); | |
1470 | ||
51c39bb1 AS |
1471 | struct bpf_reg_state; |
1472 | int btf_check_func_arg_match(struct bpf_verifier_env *env, int subprog, | |
1473 | struct bpf_reg_state *regs); | |
1474 | int btf_prepare_func_args(struct bpf_verifier_env *env, int subprog, | |
1475 | struct bpf_reg_state *reg); | |
efc68158 | 1476 | int btf_check_type_match(struct bpf_verifier_log *log, const struct bpf_prog *prog, |
be8704ff | 1477 | struct btf *btf, const struct btf_type *t); |
8c1b6e69 | 1478 | |
7e6897f9 | 1479 | struct bpf_prog *bpf_prog_by_id(u32 id); |
005142b8 | 1480 | struct bpf_link *bpf_link_by_id(u32 id); |
7e6897f9 | 1481 | |
6890896b | 1482 | const struct bpf_func_proto *bpf_base_func_proto(enum bpf_func_id func_id); |
9c270af3 | 1483 | #else /* !CONFIG_BPF_SYSCALL */ |
0fc174de DB |
1484 | static inline struct bpf_prog *bpf_prog_get(u32 ufd) |
1485 | { | |
1486 | return ERR_PTR(-EOPNOTSUPP); | |
1487 | } | |
1488 | ||
248f346f JK |
1489 | static inline struct bpf_prog *bpf_prog_get_type_dev(u32 ufd, |
1490 | enum bpf_prog_type type, | |
288b3de5 | 1491 | bool attach_drv) |
248f346f JK |
1492 | { |
1493 | return ERR_PTR(-EOPNOTSUPP); | |
1494 | } | |
1495 | ||
85192dbf | 1496 | static inline void bpf_prog_add(struct bpf_prog *prog, int i) |
cc2e0b3f | 1497 | { |
cc2e0b3f | 1498 | } |
113214be | 1499 | |
c540594f DB |
1500 | static inline void bpf_prog_sub(struct bpf_prog *prog, int i) |
1501 | { | |
1502 | } | |
1503 | ||
0fc174de DB |
1504 | static inline void bpf_prog_put(struct bpf_prog *prog) |
1505 | { | |
1506 | } | |
6d67942d | 1507 | |
85192dbf | 1508 | static inline void bpf_prog_inc(struct bpf_prog *prog) |
aa6a5f3c | 1509 | { |
aa6a5f3c | 1510 | } |
5ccb071e | 1511 | |
a6f6df69 JF |
1512 | static inline struct bpf_prog *__must_check |
1513 | bpf_prog_inc_not_zero(struct bpf_prog *prog) | |
1514 | { | |
1515 | return ERR_PTR(-EOPNOTSUPP); | |
1516 | } | |
1517 | ||
6cc7d1e8 AN |
1518 | static inline void bpf_link_init(struct bpf_link *link, enum bpf_link_type type, |
1519 | const struct bpf_link_ops *ops, | |
1520 | struct bpf_prog *prog) | |
1521 | { | |
1522 | } | |
1523 | ||
1524 | static inline int bpf_link_prime(struct bpf_link *link, | |
1525 | struct bpf_link_primer *primer) | |
1526 | { | |
1527 | return -EOPNOTSUPP; | |
1528 | } | |
1529 | ||
1530 | static inline int bpf_link_settle(struct bpf_link_primer *primer) | |
1531 | { | |
1532 | return -EOPNOTSUPP; | |
1533 | } | |
1534 | ||
1535 | static inline void bpf_link_cleanup(struct bpf_link_primer *primer) | |
1536 | { | |
1537 | } | |
1538 | ||
1539 | static inline void bpf_link_inc(struct bpf_link *link) | |
1540 | { | |
1541 | } | |
1542 | ||
1543 | static inline void bpf_link_put(struct bpf_link *link) | |
1544 | { | |
1545 | } | |
1546 | ||
6e71b04a | 1547 | static inline int bpf_obj_get_user(const char __user *pathname, int flags) |
98589a09 SL |
1548 | { |
1549 | return -EOPNOTSUPP; | |
1550 | } | |
1551 | ||
46f55cff JF |
1552 | static inline struct net_device *__dev_map_lookup_elem(struct bpf_map *map, |
1553 | u32 key) | |
1554 | { | |
1555 | return NULL; | |
1556 | } | |
1557 | ||
6f9d451a THJ |
1558 | static inline struct net_device *__dev_map_hash_lookup_elem(struct bpf_map *map, |
1559 | u32 key) | |
1560 | { | |
1561 | return NULL; | |
1562 | } | |
fbee97fe DA |
1563 | static inline bool dev_map_can_have_prog(struct bpf_map *map) |
1564 | { | |
1565 | return false; | |
1566 | } | |
6f9d451a | 1567 | |
1d233886 | 1568 | static inline void __dev_flush(void) |
46f55cff JF |
1569 | { |
1570 | } | |
9c270af3 | 1571 | |
67f29e07 JDB |
1572 | struct xdp_buff; |
1573 | struct bpf_dtab_netdev; | |
1574 | ||
1d233886 THJ |
1575 | static inline |
1576 | int dev_xdp_enqueue(struct net_device *dev, struct xdp_buff *xdp, | |
1577 | struct net_device *dev_rx) | |
1578 | { | |
1579 | return 0; | |
1580 | } | |
1581 | ||
67f29e07 | 1582 | static inline |
38edddb8 JDB |
1583 | int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp, |
1584 | struct net_device *dev_rx) | |
67f29e07 JDB |
1585 | { |
1586 | return 0; | |
1587 | } | |
1588 | ||
6d5fc195 TM |
1589 | struct sk_buff; |
1590 | ||
1591 | static inline int dev_map_generic_redirect(struct bpf_dtab_netdev *dst, | |
1592 | struct sk_buff *skb, | |
1593 | struct bpf_prog *xdp_prog) | |
1594 | { | |
1595 | return 0; | |
1596 | } | |
1597 | ||
9c270af3 JDB |
1598 | static inline |
1599 | struct bpf_cpu_map_entry *__cpu_map_lookup_elem(struct bpf_map *map, u32 key) | |
1600 | { | |
1601 | return NULL; | |
1602 | } | |
1603 | ||
cdfafe98 | 1604 | static inline void __cpu_map_flush(void) |
9c270af3 JDB |
1605 | { |
1606 | } | |
1607 | ||
9c270af3 JDB |
1608 | static inline int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu, |
1609 | struct xdp_buff *xdp, | |
1610 | struct net_device *dev_rx) | |
1611 | { | |
1612 | return 0; | |
1613 | } | |
040ee692 | 1614 | |
92164774 LB |
1615 | static inline bool cpu_map_prog_allowed(struct bpf_map *map) |
1616 | { | |
1617 | return false; | |
1618 | } | |
1619 | ||
040ee692 AV |
1620 | static inline struct bpf_prog *bpf_prog_get_type_path(const char *name, |
1621 | enum bpf_prog_type type) | |
1622 | { | |
1623 | return ERR_PTR(-EOPNOTSUPP); | |
1624 | } | |
c695865c SF |
1625 | |
1626 | static inline int bpf_prog_test_run_xdp(struct bpf_prog *prog, | |
1627 | const union bpf_attr *kattr, | |
1628 | union bpf_attr __user *uattr) | |
1629 | { | |
1630 | return -ENOTSUPP; | |
1631 | } | |
1632 | ||
1633 | static inline int bpf_prog_test_run_skb(struct bpf_prog *prog, | |
1634 | const union bpf_attr *kattr, | |
1635 | union bpf_attr __user *uattr) | |
1636 | { | |
1637 | return -ENOTSUPP; | |
1638 | } | |
1639 | ||
da00d2f1 KS |
1640 | static inline int bpf_prog_test_run_tracing(struct bpf_prog *prog, |
1641 | const union bpf_attr *kattr, | |
1642 | union bpf_attr __user *uattr) | |
1643 | { | |
1644 | return -ENOTSUPP; | |
1645 | } | |
1646 | ||
c695865c SF |
1647 | static inline int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog, |
1648 | const union bpf_attr *kattr, | |
1649 | union bpf_attr __user *uattr) | |
1650 | { | |
1651 | return -ENOTSUPP; | |
1652 | } | |
6332be04 DB |
1653 | |
1654 | static inline void bpf_map_put(struct bpf_map *map) | |
1655 | { | |
1656 | } | |
7e6897f9 BT |
1657 | |
1658 | static inline struct bpf_prog *bpf_prog_by_id(u32 id) | |
1659 | { | |
1660 | return ERR_PTR(-ENOTSUPP); | |
1661 | } | |
6890896b SF |
1662 | |
1663 | static inline const struct bpf_func_proto * | |
1664 | bpf_base_func_proto(enum bpf_func_id func_id) | |
1665 | { | |
1666 | return NULL; | |
1667 | } | |
61e021f3 | 1668 | #endif /* CONFIG_BPF_SYSCALL */ |
09756af4 | 1669 | |
479321e9 JK |
1670 | static inline struct bpf_prog *bpf_prog_get_type(u32 ufd, |
1671 | enum bpf_prog_type type) | |
1672 | { | |
1673 | return bpf_prog_get_type_dev(ufd, type, false); | |
1674 | } | |
1675 | ||
040ee692 AV |
1676 | bool bpf_prog_get_ok(struct bpf_prog *, enum bpf_prog_type *, bool); |
1677 | ||
ab3f0063 JK |
1678 | int bpf_prog_offload_compile(struct bpf_prog *prog); |
1679 | void bpf_prog_offload_destroy(struct bpf_prog *prog); | |
675fc275 JK |
1680 | int bpf_prog_offload_info_fill(struct bpf_prog_info *info, |
1681 | struct bpf_prog *prog); | |
ab3f0063 | 1682 | |
52775b33 JK |
1683 | int bpf_map_offload_info_fill(struct bpf_map_info *info, struct bpf_map *map); |
1684 | ||
a3884572 JK |
1685 | int bpf_map_offload_lookup_elem(struct bpf_map *map, void *key, void *value); |
1686 | int bpf_map_offload_update_elem(struct bpf_map *map, | |
1687 | void *key, void *value, u64 flags); | |
1688 | int bpf_map_offload_delete_elem(struct bpf_map *map, void *key); | |
1689 | int bpf_map_offload_get_next_key(struct bpf_map *map, | |
1690 | void *key, void *next_key); | |
1691 | ||
09728266 | 1692 | bool bpf_offload_prog_map_match(struct bpf_prog *prog, struct bpf_map *map); |
a3884572 | 1693 | |
1385d755 | 1694 | struct bpf_offload_dev * |
dd27c2e3 | 1695 | bpf_offload_dev_create(const struct bpf_prog_offload_ops *ops, void *priv); |
602144c2 | 1696 | void bpf_offload_dev_destroy(struct bpf_offload_dev *offdev); |
dd27c2e3 | 1697 | void *bpf_offload_dev_priv(struct bpf_offload_dev *offdev); |
602144c2 JK |
1698 | int bpf_offload_dev_netdev_register(struct bpf_offload_dev *offdev, |
1699 | struct net_device *netdev); | |
1700 | void bpf_offload_dev_netdev_unregister(struct bpf_offload_dev *offdev, | |
1701 | struct net_device *netdev); | |
fd4f227d | 1702 | bool bpf_offload_dev_match(struct bpf_prog *prog, struct net_device *netdev); |
9fd7c555 | 1703 | |
ab3f0063 JK |
1704 | #if defined(CONFIG_NET) && defined(CONFIG_BPF_SYSCALL) |
1705 | int bpf_prog_offload_init(struct bpf_prog *prog, union bpf_attr *attr); | |
1706 | ||
0d830032 | 1707 | static inline bool bpf_prog_is_dev_bound(const struct bpf_prog_aux *aux) |
ab3f0063 | 1708 | { |
9a18eedb | 1709 | return aux->offload_requested; |
ab3f0063 | 1710 | } |
a3884572 JK |
1711 | |
1712 | static inline bool bpf_map_is_dev_bound(struct bpf_map *map) | |
1713 | { | |
1714 | return unlikely(map->ops == &bpf_map_offload_ops); | |
1715 | } | |
1716 | ||
1717 | struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr); | |
1718 | void bpf_map_offload_map_free(struct bpf_map *map); | |
ab3f0063 JK |
1719 | #else |
1720 | static inline int bpf_prog_offload_init(struct bpf_prog *prog, | |
1721 | union bpf_attr *attr) | |
1722 | { | |
1723 | return -EOPNOTSUPP; | |
1724 | } | |
1725 | ||
1726 | static inline bool bpf_prog_is_dev_bound(struct bpf_prog_aux *aux) | |
1727 | { | |
1728 | return false; | |
1729 | } | |
a3884572 JK |
1730 | |
1731 | static inline bool bpf_map_is_dev_bound(struct bpf_map *map) | |
1732 | { | |
1733 | return false; | |
1734 | } | |
1735 | ||
1736 | static inline struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr) | |
1737 | { | |
1738 | return ERR_PTR(-EOPNOTSUPP); | |
1739 | } | |
1740 | ||
1741 | static inline void bpf_map_offload_map_free(struct bpf_map *map) | |
1742 | { | |
1743 | } | |
ab3f0063 JK |
1744 | #endif /* CONFIG_NET && CONFIG_BPF_SYSCALL */ |
1745 | ||
604326b4 | 1746 | #if defined(CONFIG_BPF_STREAM_PARSER) |
bb0de313 LB |
1747 | int sock_map_prog_update(struct bpf_map *map, struct bpf_prog *prog, |
1748 | struct bpf_prog *old, u32 which); | |
604326b4 | 1749 | int sock_map_get_from_fd(const union bpf_attr *attr, struct bpf_prog *prog); |
bb0de313 | 1750 | int sock_map_prog_detach(const union bpf_attr *attr, enum bpf_prog_type ptype); |
13b79d3f | 1751 | int sock_map_update_elem_sys(struct bpf_map *map, void *key, void *value, u64 flags); |
f747632b LB |
1752 | void sock_map_unhash(struct sock *sk); |
1753 | void sock_map_close(struct sock *sk, long timeout); | |
6bdc9c4c | 1754 | #else |
604326b4 | 1755 | static inline int sock_map_prog_update(struct bpf_map *map, |
bb0de313 LB |
1756 | struct bpf_prog *prog, |
1757 | struct bpf_prog *old, u32 which) | |
464bc0fd JF |
1758 | { |
1759 | return -EOPNOTSUPP; | |
1760 | } | |
fdb5c453 | 1761 | |
604326b4 DB |
1762 | static inline int sock_map_get_from_fd(const union bpf_attr *attr, |
1763 | struct bpf_prog *prog) | |
fdb5c453 SY |
1764 | { |
1765 | return -EINVAL; | |
1766 | } | |
bb0de313 LB |
1767 | |
1768 | static inline int sock_map_prog_detach(const union bpf_attr *attr, | |
1769 | enum bpf_prog_type ptype) | |
1770 | { | |
1771 | return -EOPNOTSUPP; | |
1772 | } | |
13b79d3f LB |
1773 | |
1774 | static inline int sock_map_update_elem_sys(struct bpf_map *map, void *key, void *value, | |
1775 | u64 flags) | |
1776 | { | |
1777 | return -EOPNOTSUPP; | |
1778 | } | |
f747632b | 1779 | #endif /* CONFIG_BPF_STREAM_PARSER */ |
6bdc9c4c | 1780 | |
5dc4c4b7 MKL |
1781 | #if defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL) |
1782 | void bpf_sk_reuseport_detach(struct sock *sk); | |
1783 | int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map, void *key, | |
1784 | void *value); | |
1785 | int bpf_fd_reuseport_array_update_elem(struct bpf_map *map, void *key, | |
1786 | void *value, u64 map_flags); | |
1787 | #else | |
1788 | static inline void bpf_sk_reuseport_detach(struct sock *sk) | |
1789 | { | |
1790 | } | |
1791 | ||
1792 | #ifdef CONFIG_BPF_SYSCALL | |
1793 | static inline int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map, | |
1794 | void *key, void *value) | |
1795 | { | |
1796 | return -EOPNOTSUPP; | |
1797 | } | |
1798 | ||
1799 | static inline int bpf_fd_reuseport_array_update_elem(struct bpf_map *map, | |
1800 | void *key, void *value, | |
1801 | u64 map_flags) | |
1802 | { | |
1803 | return -EOPNOTSUPP; | |
1804 | } | |
1805 | #endif /* CONFIG_BPF_SYSCALL */ | |
1806 | #endif /* defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL) */ | |
1807 | ||
d0003ec0 | 1808 | /* verifier prototypes for helper functions called from eBPF programs */ |
a2c83fff DB |
1809 | extern const struct bpf_func_proto bpf_map_lookup_elem_proto; |
1810 | extern const struct bpf_func_proto bpf_map_update_elem_proto; | |
1811 | extern const struct bpf_func_proto bpf_map_delete_elem_proto; | |
f1a2e44a MV |
1812 | extern const struct bpf_func_proto bpf_map_push_elem_proto; |
1813 | extern const struct bpf_func_proto bpf_map_pop_elem_proto; | |
1814 | extern const struct bpf_func_proto bpf_map_peek_elem_proto; | |
d0003ec0 | 1815 | |
03e69b50 | 1816 | extern const struct bpf_func_proto bpf_get_prandom_u32_proto; |
c04167ce | 1817 | extern const struct bpf_func_proto bpf_get_smp_processor_id_proto; |
2d0e30c3 | 1818 | extern const struct bpf_func_proto bpf_get_numa_node_id_proto; |
04fd61ab | 1819 | extern const struct bpf_func_proto bpf_tail_call_proto; |
17ca8cbf | 1820 | extern const struct bpf_func_proto bpf_ktime_get_ns_proto; |
71d19214 | 1821 | extern const struct bpf_func_proto bpf_ktime_get_boot_ns_proto; |
ffeedafb AS |
1822 | extern const struct bpf_func_proto bpf_get_current_pid_tgid_proto; |
1823 | extern const struct bpf_func_proto bpf_get_current_uid_gid_proto; | |
1824 | extern const struct bpf_func_proto bpf_get_current_comm_proto; | |
d5a3b1f6 | 1825 | extern const struct bpf_func_proto bpf_get_stackid_proto; |
c195651e | 1826 | extern const struct bpf_func_proto bpf_get_stack_proto; |
fa28dcb8 | 1827 | extern const struct bpf_func_proto bpf_get_task_stack_proto; |
7b04d6d6 SL |
1828 | extern const struct bpf_func_proto bpf_get_stackid_proto_pe; |
1829 | extern const struct bpf_func_proto bpf_get_stack_proto_pe; | |
174a79ff | 1830 | extern const struct bpf_func_proto bpf_sock_map_update_proto; |
81110384 | 1831 | extern const struct bpf_func_proto bpf_sock_hash_update_proto; |
bf6fa2c8 | 1832 | extern const struct bpf_func_proto bpf_get_current_cgroup_id_proto; |
0f09abd1 | 1833 | extern const struct bpf_func_proto bpf_get_current_ancestor_cgroup_id_proto; |
604326b4 DB |
1834 | extern const struct bpf_func_proto bpf_msg_redirect_hash_proto; |
1835 | extern const struct bpf_func_proto bpf_msg_redirect_map_proto; | |
1836 | extern const struct bpf_func_proto bpf_sk_redirect_hash_proto; | |
1837 | extern const struct bpf_func_proto bpf_sk_redirect_map_proto; | |
d83525ca AS |
1838 | extern const struct bpf_func_proto bpf_spin_lock_proto; |
1839 | extern const struct bpf_func_proto bpf_spin_unlock_proto; | |
cd339431 | 1840 | extern const struct bpf_func_proto bpf_get_local_storage_proto; |
d7a4cb9b AI |
1841 | extern const struct bpf_func_proto bpf_strtol_proto; |
1842 | extern const struct bpf_func_proto bpf_strtoul_proto; | |
0d01da6a | 1843 | extern const struct bpf_func_proto bpf_tcp_sock_proto; |
5576b991 | 1844 | extern const struct bpf_func_proto bpf_jiffies64_proto; |
b4490c5c | 1845 | extern const struct bpf_func_proto bpf_get_ns_current_pid_tgid_proto; |
0456ea17 | 1846 | extern const struct bpf_func_proto bpf_event_output_data_proto; |
457f4436 AN |
1847 | extern const struct bpf_func_proto bpf_ringbuf_output_proto; |
1848 | extern const struct bpf_func_proto bpf_ringbuf_reserve_proto; | |
1849 | extern const struct bpf_func_proto bpf_ringbuf_submit_proto; | |
1850 | extern const struct bpf_func_proto bpf_ringbuf_discard_proto; | |
1851 | extern const struct bpf_func_proto bpf_ringbuf_query_proto; | |
af7ec138 | 1852 | extern const struct bpf_func_proto bpf_skc_to_tcp6_sock_proto; |
478cfbdf YS |
1853 | extern const struct bpf_func_proto bpf_skc_to_tcp_sock_proto; |
1854 | extern const struct bpf_func_proto bpf_skc_to_tcp_timewait_sock_proto; | |
1855 | extern const struct bpf_func_proto bpf_skc_to_tcp_request_sock_proto; | |
0d4fad3e | 1856 | extern const struct bpf_func_proto bpf_skc_to_udp6_sock_proto; |
07be4c4a | 1857 | extern const struct bpf_func_proto bpf_copy_from_user_proto; |
c4d0bfb4 | 1858 | extern const struct bpf_func_proto bpf_snprintf_btf_proto; |
eaa6bcb7 | 1859 | extern const struct bpf_func_proto bpf_per_cpu_ptr_proto; |
63d9b80d | 1860 | extern const struct bpf_func_proto bpf_this_cpu_ptr_proto; |
d0551261 | 1861 | extern const struct bpf_func_proto bpf_ktime_get_coarse_ns_proto; |
b60da495 | 1862 | extern const struct bpf_func_proto bpf_sock_from_file_proto; |
cd339431 | 1863 | |
fc611f47 KS |
1864 | const struct bpf_func_proto *bpf_tracing_func_proto( |
1865 | enum bpf_func_id func_id, const struct bpf_prog *prog); | |
1866 | ||
958a3f2d JO |
1867 | const struct bpf_func_proto *tracing_prog_func_proto( |
1868 | enum bpf_func_id func_id, const struct bpf_prog *prog); | |
1869 | ||
3ad00405 DB |
1870 | /* Shared helpers among cBPF and eBPF. */ |
1871 | void bpf_user_rnd_init_once(void); | |
1872 | u64 bpf_user_rnd_u32(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5); | |
6890896b | 1873 | u64 bpf_get_raw_cpu_id(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5); |
3ad00405 | 1874 | |
c64b7983 | 1875 | #if defined(CONFIG_NET) |
46f8bc92 MKL |
1876 | bool bpf_sock_common_is_valid_access(int off, int size, |
1877 | enum bpf_access_type type, | |
1878 | struct bpf_insn_access_aux *info); | |
c64b7983 JS |
1879 | bool bpf_sock_is_valid_access(int off, int size, enum bpf_access_type type, |
1880 | struct bpf_insn_access_aux *info); | |
1881 | u32 bpf_sock_convert_ctx_access(enum bpf_access_type type, | |
1882 | const struct bpf_insn *si, | |
1883 | struct bpf_insn *insn_buf, | |
1884 | struct bpf_prog *prog, | |
1885 | u32 *target_size); | |
1886 | #else | |
46f8bc92 MKL |
1887 | static inline bool bpf_sock_common_is_valid_access(int off, int size, |
1888 | enum bpf_access_type type, | |
1889 | struct bpf_insn_access_aux *info) | |
1890 | { | |
1891 | return false; | |
1892 | } | |
c64b7983 JS |
1893 | static inline bool bpf_sock_is_valid_access(int off, int size, |
1894 | enum bpf_access_type type, | |
1895 | struct bpf_insn_access_aux *info) | |
1896 | { | |
1897 | return false; | |
1898 | } | |
1899 | static inline u32 bpf_sock_convert_ctx_access(enum bpf_access_type type, | |
1900 | const struct bpf_insn *si, | |
1901 | struct bpf_insn *insn_buf, | |
1902 | struct bpf_prog *prog, | |
1903 | u32 *target_size) | |
1904 | { | |
1905 | return 0; | |
1906 | } | |
1907 | #endif | |
1908 | ||
655a51e5 | 1909 | #ifdef CONFIG_INET |
91cc1a99 AS |
1910 | struct sk_reuseport_kern { |
1911 | struct sk_buff *skb; | |
1912 | struct sock *sk; | |
1913 | struct sock *selected_sk; | |
1914 | void *data_end; | |
1915 | u32 hash; | |
1916 | u32 reuseport_id; | |
1917 | bool bind_inany; | |
1918 | }; | |
655a51e5 MKL |
1919 | bool bpf_tcp_sock_is_valid_access(int off, int size, enum bpf_access_type type, |
1920 | struct bpf_insn_access_aux *info); | |
1921 | ||
1922 | u32 bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type, | |
1923 | const struct bpf_insn *si, | |
1924 | struct bpf_insn *insn_buf, | |
1925 | struct bpf_prog *prog, | |
1926 | u32 *target_size); | |
7f94208c Y |
1927 | |
1928 | bool bpf_xdp_sock_is_valid_access(int off, int size, enum bpf_access_type type, | |
1929 | struct bpf_insn_access_aux *info); | |
1930 | ||
1931 | u32 bpf_xdp_sock_convert_ctx_access(enum bpf_access_type type, | |
1932 | const struct bpf_insn *si, | |
1933 | struct bpf_insn *insn_buf, | |
1934 | struct bpf_prog *prog, | |
1935 | u32 *target_size); | |
655a51e5 MKL |
1936 | #else |
1937 | static inline bool bpf_tcp_sock_is_valid_access(int off, int size, | |
1938 | enum bpf_access_type type, | |
1939 | struct bpf_insn_access_aux *info) | |
1940 | { | |
1941 | return false; | |
1942 | } | |
1943 | ||
1944 | static inline u32 bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type, | |
1945 | const struct bpf_insn *si, | |
1946 | struct bpf_insn *insn_buf, | |
1947 | struct bpf_prog *prog, | |
1948 | u32 *target_size) | |
1949 | { | |
1950 | return 0; | |
1951 | } | |
7f94208c Y |
1952 | static inline bool bpf_xdp_sock_is_valid_access(int off, int size, |
1953 | enum bpf_access_type type, | |
1954 | struct bpf_insn_access_aux *info) | |
1955 | { | |
1956 | return false; | |
1957 | } | |
1958 | ||
1959 | static inline u32 bpf_xdp_sock_convert_ctx_access(enum bpf_access_type type, | |
1960 | const struct bpf_insn *si, | |
1961 | struct bpf_insn *insn_buf, | |
1962 | struct bpf_prog *prog, | |
1963 | u32 *target_size) | |
1964 | { | |
1965 | return 0; | |
1966 | } | |
655a51e5 MKL |
1967 | #endif /* CONFIG_INET */ |
1968 | ||
5964b200 | 1969 | enum bpf_text_poke_type { |
b553a6ec DB |
1970 | BPF_MOD_CALL, |
1971 | BPF_MOD_JUMP, | |
5964b200 | 1972 | }; |
4b3da77b | 1973 | |
5964b200 AS |
1974 | int bpf_arch_text_poke(void *ip, enum bpf_text_poke_type t, |
1975 | void *addr1, void *addr2); | |
1976 | ||
eae2e83e | 1977 | struct btf_id_set; |
2af30f11 | 1978 | bool btf_id_set_contains(const struct btf_id_set *set, u32 id); |
eae2e83e | 1979 | |
99c55f7d | 1980 | #endif /* _LINUX_BPF_H */ |