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> |
fec56f58 AS |
17 | #include <linux/refcount.h> |
18 | #include <linux/mutex.h> | |
85d33df3 | 19 | #include <linux/module.h> |
bfea9a85 | 20 | #include <linux/kallsyms.h> |
2c78ee89 | 21 | #include <linux/capability.h> |
48edc1f7 RG |
22 | #include <linux/sched/mm.h> |
23 | #include <linux/slab.h> | |
e21aa341 | 24 | #include <linux/percpu-refcount.h> |
af2ac3e1 | 25 | #include <linux/bpfptr.h> |
99c55f7d | 26 | |
cae1927c | 27 | struct bpf_verifier_env; |
9e15db66 | 28 | struct bpf_verifier_log; |
3b1efb19 | 29 | struct perf_event; |
174a79ff | 30 | struct bpf_prog; |
da765a2f | 31 | struct bpf_prog_aux; |
99c55f7d | 32 | struct bpf_map; |
4f738adb | 33 | struct sock; |
a26ca7c9 | 34 | struct seq_file; |
1b2b234b | 35 | struct btf; |
e8d2bec0 | 36 | struct btf_type; |
3dec541b | 37 | struct exception_table_entry; |
ae24345d | 38 | struct seq_operations; |
f9c79272 | 39 | struct bpf_iter_aux_info; |
f836a56e KS |
40 | struct bpf_local_storage; |
41 | struct bpf_local_storage_map; | |
36e68442 | 42 | struct kobject; |
48edc1f7 | 43 | struct mem_cgroup; |
861de02e | 44 | struct module; |
69c087ba | 45 | struct bpf_func_state; |
99c55f7d | 46 | |
1b9ed84e QM |
47 | extern struct idr btf_idr; |
48 | extern spinlock_t btf_idr_lock; | |
36e68442 | 49 | extern struct kobject *btf_kobj; |
1b9ed84e | 50 | |
102acbac | 51 | typedef u64 (*bpf_callback_t)(u64, u64, u64, u64, u64); |
f9c79272 YS |
52 | typedef int (*bpf_iter_init_seq_priv_t)(void *private_data, |
53 | struct bpf_iter_aux_info *aux); | |
14fc6bd6 YS |
54 | typedef void (*bpf_iter_fini_seq_priv_t)(void *private_data); |
55 | struct bpf_iter_seq_info { | |
56 | const struct seq_operations *seq_ops; | |
57 | bpf_iter_init_seq_priv_t init_seq_private; | |
58 | bpf_iter_fini_seq_priv_t fini_seq_private; | |
59 | u32 seq_priv_size; | |
60 | }; | |
61 | ||
5d903493 | 62 | /* map is generic key/value storage optionally accessible by eBPF programs */ |
99c55f7d AS |
63 | struct bpf_map_ops { |
64 | /* funcs callable from userspace (via syscall) */ | |
1110f3a9 | 65 | int (*map_alloc_check)(union bpf_attr *attr); |
99c55f7d | 66 | struct bpf_map *(*map_alloc)(union bpf_attr *attr); |
61d1b6a4 DB |
67 | void (*map_release)(struct bpf_map *map, struct file *map_file); |
68 | void (*map_free)(struct bpf_map *map); | |
db20fd2b | 69 | int (*map_get_next_key)(struct bpf_map *map, void *key, void *next_key); |
ba6b8de4 | 70 | void (*map_release_uref)(struct bpf_map *map); |
c6110222 | 71 | void *(*map_lookup_elem_sys_only)(struct bpf_map *map, void *key); |
cb4d03ab BV |
72 | int (*map_lookup_batch)(struct bpf_map *map, const union bpf_attr *attr, |
73 | union bpf_attr __user *uattr); | |
3e87f192 DS |
74 | int (*map_lookup_and_delete_elem)(struct bpf_map *map, void *key, |
75 | void *value, u64 flags); | |
05799638 YS |
76 | int (*map_lookup_and_delete_batch)(struct bpf_map *map, |
77 | const union bpf_attr *attr, | |
78 | union bpf_attr __user *uattr); | |
aa2e93b8 BV |
79 | int (*map_update_batch)(struct bpf_map *map, const union bpf_attr *attr, |
80 | union bpf_attr __user *uattr); | |
81 | int (*map_delete_batch)(struct bpf_map *map, const union bpf_attr *attr, | |
82 | union bpf_attr __user *uattr); | |
db20fd2b AS |
83 | |
84 | /* funcs callable from userspace and from eBPF programs */ | |
85 | void *(*map_lookup_elem)(struct bpf_map *map, void *key); | |
3274f520 | 86 | int (*map_update_elem)(struct bpf_map *map, void *key, void *value, u64 flags); |
db20fd2b | 87 | int (*map_delete_elem)(struct bpf_map *map, void *key); |
f1a2e44a MV |
88 | int (*map_push_elem)(struct bpf_map *map, void *value, u64 flags); |
89 | int (*map_pop_elem)(struct bpf_map *map, void *value); | |
90 | int (*map_peek_elem)(struct bpf_map *map, void *value); | |
2a36f0b9 WN |
91 | |
92 | /* funcs called by prog_array and perf_event_array map */ | |
d056a788 DB |
93 | void *(*map_fd_get_ptr)(struct bpf_map *map, struct file *map_file, |
94 | int fd); | |
95 | void (*map_fd_put_ptr)(void *ptr); | |
4a8f87e6 | 96 | int (*map_gen_lookup)(struct bpf_map *map, struct bpf_insn *insn_buf); |
14dc6f04 | 97 | u32 (*map_fd_sys_lookup_elem)(void *ptr); |
a26ca7c9 MKL |
98 | void (*map_seq_show_elem)(struct bpf_map *map, void *key, |
99 | struct seq_file *m); | |
e8d2bec0 | 100 | int (*map_check_btf)(const struct bpf_map *map, |
1b2b234b | 101 | const struct btf *btf, |
e8d2bec0 DB |
102 | const struct btf_type *key_type, |
103 | const struct btf_type *value_type); | |
d8eca5bb | 104 | |
da765a2f DB |
105 | /* Prog poke tracking helpers. */ |
106 | int (*map_poke_track)(struct bpf_map *map, struct bpf_prog_aux *aux); | |
107 | void (*map_poke_untrack)(struct bpf_map *map, struct bpf_prog_aux *aux); | |
108 | void (*map_poke_run)(struct bpf_map *map, u32 key, struct bpf_prog *old, | |
109 | struct bpf_prog *new); | |
110 | ||
d8eca5bb DB |
111 | /* Direct value access helpers. */ |
112 | int (*map_direct_value_addr)(const struct bpf_map *map, | |
113 | u64 *imm, u32 off); | |
114 | int (*map_direct_value_meta)(const struct bpf_map *map, | |
115 | u64 imm, u32 *off); | |
fc970227 | 116 | int (*map_mmap)(struct bpf_map *map, struct vm_area_struct *vma); |
457f4436 AN |
117 | __poll_t (*map_poll)(struct bpf_map *map, struct file *filp, |
118 | struct poll_table_struct *pts); | |
41c48f3a | 119 | |
f836a56e KS |
120 | /* Functions called by bpf_local_storage maps */ |
121 | int (*map_local_storage_charge)(struct bpf_local_storage_map *smap, | |
122 | void *owner, u32 size); | |
123 | void (*map_local_storage_uncharge)(struct bpf_local_storage_map *smap, | |
124 | void *owner, u32 size); | |
125 | struct bpf_local_storage __rcu ** (*map_owner_storage_ptr)(void *owner); | |
f4d05259 | 126 | |
e6a4750f BT |
127 | /* Misc helpers.*/ |
128 | int (*map_redirect)(struct bpf_map *map, u32 ifindex, u64 flags); | |
129 | ||
f4d05259 MKL |
130 | /* map_meta_equal must be implemented for maps that can be |
131 | * used as an inner map. It is a runtime check to ensure | |
132 | * an inner map can be inserted to an outer map. | |
133 | * | |
134 | * Some properties of the inner map has been used during the | |
135 | * verification time. When inserting an inner map at the runtime, | |
136 | * map_meta_equal has to ensure the inserting map has the same | |
137 | * properties that the verifier has used earlier. | |
138 | */ | |
139 | bool (*map_meta_equal)(const struct bpf_map *meta0, | |
140 | const struct bpf_map *meta1); | |
141 | ||
69c087ba YS |
142 | |
143 | int (*map_set_for_each_callback_args)(struct bpf_verifier_env *env, | |
144 | struct bpf_func_state *caller, | |
145 | struct bpf_func_state *callee); | |
102acbac KC |
146 | int (*map_for_each_callback)(struct bpf_map *map, |
147 | bpf_callback_t callback_fn, | |
69c087ba YS |
148 | void *callback_ctx, u64 flags); |
149 | ||
41c48f3a AI |
150 | /* BTF name and id of struct allocated by map_alloc */ |
151 | const char * const map_btf_name; | |
152 | int *map_btf_id; | |
a5cbe05a YS |
153 | |
154 | /* bpf_iter info used to open a seq_file */ | |
155 | const struct bpf_iter_seq_info *iter_seq_info; | |
99c55f7d AS |
156 | }; |
157 | ||
158 | struct bpf_map { | |
a26ca7c9 | 159 | /* The first two cachelines with read-mostly members of which some |
be95a845 DB |
160 | * are also accessed in fast-path (e.g. ops, max_entries). |
161 | */ | |
162 | const struct bpf_map_ops *ops ____cacheline_aligned; | |
163 | struct bpf_map *inner_map_meta; | |
164 | #ifdef CONFIG_SECURITY | |
165 | void *security; | |
166 | #endif | |
99c55f7d AS |
167 | enum bpf_map_type map_type; |
168 | u32 key_size; | |
169 | u32 value_size; | |
170 | u32 max_entries; | |
9330986c | 171 | u64 map_extra; /* any per-map-type extra fields */ |
6c905981 | 172 | u32 map_flags; |
d83525ca | 173 | int spin_lock_off; /* >=0 valid offset, <0 error */ |
b00628b1 | 174 | int timer_off; /* >=0 valid offset, <0 error */ |
f3f1c054 | 175 | u32 id; |
96eabe7a | 176 | int numa_node; |
9b2cf328 MKL |
177 | u32 btf_key_type_id; |
178 | u32 btf_value_type_id; | |
8845b468 | 179 | u32 btf_vmlinux_value_type_id; |
a26ca7c9 | 180 | struct btf *btf; |
48edc1f7 RG |
181 | #ifdef CONFIG_MEMCG_KMEM |
182 | struct mem_cgroup *memcg; | |
183 | #endif | |
fc970227 | 184 | char name[BPF_OBJ_NAME_LEN]; |
2c78ee89 | 185 | bool bypass_spec_v1; |
fc970227 | 186 | bool frozen; /* write-once; write-protected by freeze_mutex */ |
8845b468 | 187 | /* 14 bytes hole */ |
be95a845 | 188 | |
a26ca7c9 | 189 | /* The 3rd and 4th cacheline with misc members to avoid false sharing |
be95a845 DB |
190 | * particularly with refcounting. |
191 | */ | |
1e0bd5a0 AN |
192 | atomic64_t refcnt ____cacheline_aligned; |
193 | atomic64_t usercnt; | |
be95a845 | 194 | struct work_struct work; |
fc970227 | 195 | struct mutex freeze_mutex; |
353050be | 196 | atomic64_t writecnt; |
f45d5b6c THJ |
197 | /* 'Ownership' of program-containing map is claimed by the first program |
198 | * that is going to use this map or by the first program which FD is | |
199 | * stored in the map to make sure that all callers and callees have the | |
200 | * same prog type, JITed flag and xdp_has_frags flag. | |
201 | */ | |
202 | struct { | |
203 | spinlock_t lock; | |
204 | enum bpf_prog_type type; | |
205 | bool jited; | |
206 | bool xdp_has_frags; | |
207 | } owner; | |
99c55f7d AS |
208 | }; |
209 | ||
d83525ca AS |
210 | static inline bool map_value_has_spin_lock(const struct bpf_map *map) |
211 | { | |
212 | return map->spin_lock_off >= 0; | |
213 | } | |
214 | ||
68134668 | 215 | static inline bool map_value_has_timer(const struct bpf_map *map) |
d83525ca | 216 | { |
68134668 | 217 | return map->timer_off >= 0; |
d83525ca AS |
218 | } |
219 | ||
68134668 AS |
220 | static inline void check_and_init_map_value(struct bpf_map *map, void *dst) |
221 | { | |
222 | if (unlikely(map_value_has_spin_lock(map))) | |
223 | *(struct bpf_spin_lock *)(dst + map->spin_lock_off) = | |
224 | (struct bpf_spin_lock){}; | |
225 | if (unlikely(map_value_has_timer(map))) | |
226 | *(struct bpf_timer *)(dst + map->timer_off) = | |
227 | (struct bpf_timer){}; | |
228 | } | |
229 | ||
230 | /* copy everything but bpf_spin_lock and bpf_timer. There could be one of each. */ | |
d83525ca AS |
231 | static inline void copy_map_value(struct bpf_map *map, void *dst, void *src) |
232 | { | |
68134668 AS |
233 | u32 s_off = 0, s_sz = 0, t_off = 0, t_sz = 0; |
234 | ||
d83525ca | 235 | if (unlikely(map_value_has_spin_lock(map))) { |
68134668 AS |
236 | s_off = map->spin_lock_off; |
237 | s_sz = sizeof(struct bpf_spin_lock); | |
238 | } else if (unlikely(map_value_has_timer(map))) { | |
239 | t_off = map->timer_off; | |
240 | t_sz = sizeof(struct bpf_timer); | |
241 | } | |
d83525ca | 242 | |
68134668 AS |
243 | if (unlikely(s_sz || t_sz)) { |
244 | if (s_off < t_off || !s_sz) { | |
245 | swap(s_off, t_off); | |
246 | swap(s_sz, t_sz); | |
247 | } | |
248 | memcpy(dst, src, t_off); | |
249 | memcpy(dst + t_off + t_sz, | |
250 | src + t_off + t_sz, | |
251 | s_off - t_off - t_sz); | |
252 | memcpy(dst + s_off + s_sz, | |
253 | src + s_off + s_sz, | |
254 | map->value_size - s_off - s_sz); | |
d83525ca AS |
255 | } else { |
256 | memcpy(dst, src, map->value_size); | |
257 | } | |
258 | } | |
96049f3a AS |
259 | void copy_map_value_locked(struct bpf_map *map, void *dst, void *src, |
260 | bool lock_src); | |
b00628b1 | 261 | void bpf_timer_cancel_and_free(void *timer); |
8e7ae251 | 262 | int bpf_obj_name_cpy(char *dst, const char *src, unsigned int size); |
d83525ca | 263 | |
602144c2 | 264 | struct bpf_offload_dev; |
a3884572 JK |
265 | struct bpf_offloaded_map; |
266 | ||
267 | struct bpf_map_dev_ops { | |
268 | int (*map_get_next_key)(struct bpf_offloaded_map *map, | |
269 | void *key, void *next_key); | |
270 | int (*map_lookup_elem)(struct bpf_offloaded_map *map, | |
271 | void *key, void *value); | |
272 | int (*map_update_elem)(struct bpf_offloaded_map *map, | |
273 | void *key, void *value, u64 flags); | |
274 | int (*map_delete_elem)(struct bpf_offloaded_map *map, void *key); | |
275 | }; | |
276 | ||
277 | struct bpf_offloaded_map { | |
278 | struct bpf_map map; | |
279 | struct net_device *netdev; | |
280 | const struct bpf_map_dev_ops *dev_ops; | |
281 | void *dev_priv; | |
282 | struct list_head offloads; | |
283 | }; | |
284 | ||
285 | static inline struct bpf_offloaded_map *map_to_offmap(struct bpf_map *map) | |
286 | { | |
287 | return container_of(map, struct bpf_offloaded_map, map); | |
288 | } | |
289 | ||
0cd3cbed JK |
290 | static inline bool bpf_map_offload_neutral(const struct bpf_map *map) |
291 | { | |
292 | return map->map_type == BPF_MAP_TYPE_PERF_EVENT_ARRAY; | |
293 | } | |
294 | ||
a26ca7c9 MKL |
295 | static inline bool bpf_map_support_seq_show(const struct bpf_map *map) |
296 | { | |
85d33df3 MKL |
297 | return (map->btf_value_type_id || map->btf_vmlinux_value_type_id) && |
298 | map->ops->map_seq_show_elem; | |
a26ca7c9 MKL |
299 | } |
300 | ||
e8d2bec0 | 301 | int map_check_no_btf(const struct bpf_map *map, |
1b2b234b | 302 | const struct btf *btf, |
e8d2bec0 DB |
303 | const struct btf_type *key_type, |
304 | const struct btf_type *value_type); | |
305 | ||
f4d05259 MKL |
306 | bool bpf_map_meta_equal(const struct bpf_map *meta0, |
307 | const struct bpf_map *meta1); | |
308 | ||
a3884572 JK |
309 | extern const struct bpf_map_ops bpf_map_offload_ops; |
310 | ||
d639b9d1 HL |
311 | /* bpf_type_flag contains a set of flags that are applicable to the values of |
312 | * arg_type, ret_type and reg_type. For example, a pointer value may be null, | |
313 | * or a memory is read-only. We classify types into two categories: base types | |
314 | * and extended types. Extended types are base types combined with a type flag. | |
315 | * | |
316 | * Currently there are no more than 32 base types in arg_type, ret_type and | |
317 | * reg_types. | |
318 | */ | |
319 | #define BPF_BASE_TYPE_BITS 8 | |
320 | ||
321 | enum bpf_type_flag { | |
322 | /* PTR may be NULL. */ | |
323 | PTR_MAYBE_NULL = BIT(0 + BPF_BASE_TYPE_BITS), | |
324 | ||
216e3cd2 HL |
325 | /* MEM is read-only. When applied on bpf_arg, it indicates the arg is |
326 | * compatible with both mutable and immutable memory. | |
327 | */ | |
20b2aff4 HL |
328 | MEM_RDONLY = BIT(1 + BPF_BASE_TYPE_BITS), |
329 | ||
a672b2e3 DB |
330 | /* MEM was "allocated" from a different helper, and cannot be mixed |
331 | * with regular non-MEM_ALLOC'ed MEM types. | |
332 | */ | |
333 | MEM_ALLOC = BIT(2 + BPF_BASE_TYPE_BITS), | |
334 | ||
c6f1bfe8 YS |
335 | /* MEM is in user address space. */ |
336 | MEM_USER = BIT(3 + BPF_BASE_TYPE_BITS), | |
337 | ||
338 | __BPF_TYPE_LAST_FLAG = MEM_USER, | |
d639b9d1 HL |
339 | }; |
340 | ||
341 | /* Max number of base types. */ | |
342 | #define BPF_BASE_TYPE_LIMIT (1UL << BPF_BASE_TYPE_BITS) | |
343 | ||
344 | /* Max number of all types. */ | |
345 | #define BPF_TYPE_LIMIT (__BPF_TYPE_LAST_FLAG | (__BPF_TYPE_LAST_FLAG - 1)) | |
346 | ||
17a52670 AS |
347 | /* function argument constraints */ |
348 | enum bpf_arg_type { | |
80f1d68c | 349 | ARG_DONTCARE = 0, /* unused argument in helper function */ |
17a52670 AS |
350 | |
351 | /* the following constraints used to prototype | |
352 | * bpf_map_lookup/update/delete_elem() functions | |
353 | */ | |
354 | ARG_CONST_MAP_PTR, /* const argument used as pointer to bpf_map */ | |
355 | ARG_PTR_TO_MAP_KEY, /* pointer to stack used as map key */ | |
356 | ARG_PTR_TO_MAP_VALUE, /* pointer to stack used as map value */ | |
2ea864c5 | 357 | ARG_PTR_TO_UNINIT_MAP_VALUE, /* pointer to valid memory used to store a map value */ |
17a52670 AS |
358 | |
359 | /* the following constraints used to prototype bpf_memcmp() and other | |
360 | * functions that access data on eBPF program stack | |
361 | */ | |
39f19ebb AS |
362 | ARG_PTR_TO_MEM, /* pointer to valid memory (stack, packet, map value) */ |
363 | ARG_PTR_TO_UNINIT_MEM, /* pointer to memory does not need to be initialized, | |
364 | * helper function must fill all bytes or clear | |
365 | * them in error case. | |
435faee1 DB |
366 | */ |
367 | ||
39f19ebb AS |
368 | ARG_CONST_SIZE, /* number of bytes accessed from memory */ |
369 | ARG_CONST_SIZE_OR_ZERO, /* number of bytes accessed from memory or 0 */ | |
80f1d68c | 370 | |
608cd71a | 371 | ARG_PTR_TO_CTX, /* pointer to context */ |
80f1d68c | 372 | ARG_ANYTHING, /* any (initialized) argument is ok */ |
d83525ca | 373 | ARG_PTR_TO_SPIN_LOCK, /* pointer to bpf_spin_lock */ |
46f8bc92 | 374 | ARG_PTR_TO_SOCK_COMMON, /* pointer to sock_common */ |
57c3bb72 AI |
375 | ARG_PTR_TO_INT, /* pointer to int */ |
376 | ARG_PTR_TO_LONG, /* pointer to long */ | |
6ac99e8f | 377 | ARG_PTR_TO_SOCKET, /* pointer to bpf_sock (fullsock) */ |
a7658e1a | 378 | ARG_PTR_TO_BTF_ID, /* pointer to in-kernel struct */ |
457f4436 | 379 | ARG_PTR_TO_ALLOC_MEM, /* pointer to dynamically allocated memory */ |
457f4436 | 380 | ARG_CONST_ALLOC_SIZE_OR_ZERO, /* number of allocated bytes requested */ |
1df8f55a | 381 | ARG_PTR_TO_BTF_ID_SOCK_COMMON, /* pointer to in-kernel sock_common or bpf-mirrored bpf_sock */ |
eaa6bcb7 | 382 | ARG_PTR_TO_PERCPU_BTF_ID, /* pointer to in-kernel percpu type */ |
69c087ba | 383 | ARG_PTR_TO_FUNC, /* pointer to a bpf program function */ |
48946bd6 | 384 | ARG_PTR_TO_STACK, /* pointer to stack */ |
fff13c4b | 385 | ARG_PTR_TO_CONST_STR, /* pointer to a null terminated read-only string */ |
b00628b1 | 386 | ARG_PTR_TO_TIMER, /* pointer to bpf_timer */ |
f79e7ea5 | 387 | __BPF_ARG_TYPE_MAX, |
d639b9d1 | 388 | |
48946bd6 HL |
389 | /* Extended arg_types. */ |
390 | ARG_PTR_TO_MAP_VALUE_OR_NULL = PTR_MAYBE_NULL | ARG_PTR_TO_MAP_VALUE, | |
391 | ARG_PTR_TO_MEM_OR_NULL = PTR_MAYBE_NULL | ARG_PTR_TO_MEM, | |
392 | ARG_PTR_TO_CTX_OR_NULL = PTR_MAYBE_NULL | ARG_PTR_TO_CTX, | |
393 | ARG_PTR_TO_SOCKET_OR_NULL = PTR_MAYBE_NULL | ARG_PTR_TO_SOCKET, | |
394 | ARG_PTR_TO_ALLOC_MEM_OR_NULL = PTR_MAYBE_NULL | ARG_PTR_TO_ALLOC_MEM, | |
395 | ARG_PTR_TO_STACK_OR_NULL = PTR_MAYBE_NULL | ARG_PTR_TO_STACK, | |
396 | ||
d639b9d1 HL |
397 | /* This must be the last entry. Its purpose is to ensure the enum is |
398 | * wide enough to hold the higher bits reserved for bpf_type_flag. | |
399 | */ | |
400 | __BPF_ARG_TYPE_LIMIT = BPF_TYPE_LIMIT, | |
17a52670 | 401 | }; |
d639b9d1 | 402 | static_assert(__BPF_ARG_TYPE_MAX <= BPF_BASE_TYPE_LIMIT); |
17a52670 AS |
403 | |
404 | /* type of values returned from helper functions */ | |
405 | enum bpf_return_type { | |
406 | RET_INTEGER, /* function returns integer */ | |
407 | RET_VOID, /* function doesn't return anything */ | |
3e6a4b3e | 408 | RET_PTR_TO_MAP_VALUE, /* returns a pointer to map elem value */ |
3c480732 HL |
409 | RET_PTR_TO_SOCKET, /* returns a pointer to a socket */ |
410 | RET_PTR_TO_TCP_SOCK, /* returns a pointer to a tcp_sock */ | |
411 | RET_PTR_TO_SOCK_COMMON, /* returns a pointer to a sock_common */ | |
412 | RET_PTR_TO_ALLOC_MEM, /* returns a pointer to dynamically allocated memory */ | |
63d9b80d | 413 | RET_PTR_TO_MEM_OR_BTF_ID, /* returns a pointer to a valid memory or a btf_id */ |
3ca1032a | 414 | RET_PTR_TO_BTF_ID, /* returns a pointer to a btf_id */ |
d639b9d1 HL |
415 | __BPF_RET_TYPE_MAX, |
416 | ||
3c480732 HL |
417 | /* Extended ret_types. */ |
418 | RET_PTR_TO_MAP_VALUE_OR_NULL = PTR_MAYBE_NULL | RET_PTR_TO_MAP_VALUE, | |
419 | RET_PTR_TO_SOCKET_OR_NULL = PTR_MAYBE_NULL | RET_PTR_TO_SOCKET, | |
420 | RET_PTR_TO_TCP_SOCK_OR_NULL = PTR_MAYBE_NULL | RET_PTR_TO_TCP_SOCK, | |
421 | RET_PTR_TO_SOCK_COMMON_OR_NULL = PTR_MAYBE_NULL | RET_PTR_TO_SOCK_COMMON, | |
a672b2e3 | 422 | RET_PTR_TO_ALLOC_MEM_OR_NULL = PTR_MAYBE_NULL | MEM_ALLOC | RET_PTR_TO_ALLOC_MEM, |
3c480732 HL |
423 | RET_PTR_TO_BTF_ID_OR_NULL = PTR_MAYBE_NULL | RET_PTR_TO_BTF_ID, |
424 | ||
d639b9d1 HL |
425 | /* This must be the last entry. Its purpose is to ensure the enum is |
426 | * wide enough to hold the higher bits reserved for bpf_type_flag. | |
427 | */ | |
428 | __BPF_RET_TYPE_LIMIT = BPF_TYPE_LIMIT, | |
17a52670 | 429 | }; |
d639b9d1 | 430 | static_assert(__BPF_RET_TYPE_MAX <= BPF_BASE_TYPE_LIMIT); |
17a52670 | 431 | |
09756af4 AS |
432 | /* eBPF function prototype used by verifier to allow BPF_CALLs from eBPF programs |
433 | * to in-kernel helper functions and for adjusting imm32 field in BPF_CALL | |
434 | * instructions after verifying | |
435 | */ | |
436 | struct bpf_func_proto { | |
437 | u64 (*func)(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5); | |
438 | bool gpl_only; | |
36bbef52 | 439 | bool pkt_access; |
17a52670 | 440 | enum bpf_return_type ret_type; |
a7658e1a AS |
441 | union { |
442 | struct { | |
443 | enum bpf_arg_type arg1_type; | |
444 | enum bpf_arg_type arg2_type; | |
445 | enum bpf_arg_type arg3_type; | |
446 | enum bpf_arg_type arg4_type; | |
447 | enum bpf_arg_type arg5_type; | |
448 | }; | |
449 | enum bpf_arg_type arg_type[5]; | |
450 | }; | |
9436ef6e LB |
451 | union { |
452 | struct { | |
453 | u32 *arg1_btf_id; | |
454 | u32 *arg2_btf_id; | |
455 | u32 *arg3_btf_id; | |
456 | u32 *arg4_btf_id; | |
457 | u32 *arg5_btf_id; | |
458 | }; | |
459 | u32 *arg_btf_id[5]; | |
460 | }; | |
af7ec138 | 461 | int *ret_btf_id; /* return value btf_id */ |
eae2e83e | 462 | bool (*allowed)(const struct bpf_prog *prog); |
17a52670 AS |
463 | }; |
464 | ||
465 | /* bpf_context is intentionally undefined structure. Pointer to bpf_context is | |
466 | * the first argument to eBPF programs. | |
467 | * For socket filters: 'struct bpf_context *' == 'struct sk_buff *' | |
468 | */ | |
469 | struct bpf_context; | |
470 | ||
471 | enum bpf_access_type { | |
472 | BPF_READ = 1, | |
473 | BPF_WRITE = 2 | |
09756af4 AS |
474 | }; |
475 | ||
19de99f7 | 476 | /* types of values stored in eBPF registers */ |
f1174f77 EC |
477 | /* Pointer types represent: |
478 | * pointer | |
479 | * pointer + imm | |
480 | * pointer + (u16) var | |
481 | * pointer + (u16) var + imm | |
482 | * if (range > 0) then [ptr, ptr + range - off) is safe to access | |
483 | * if (id > 0) means that some 'var' was added | |
484 | * if (off > 0) means that 'imm' was added | |
485 | */ | |
19de99f7 AS |
486 | enum bpf_reg_type { |
487 | NOT_INIT = 0, /* nothing was written into register */ | |
f1174f77 | 488 | SCALAR_VALUE, /* reg doesn't contain a valid pointer */ |
19de99f7 AS |
489 | PTR_TO_CTX, /* reg points to bpf_context */ |
490 | CONST_PTR_TO_MAP, /* reg points to struct bpf_map */ | |
491 | PTR_TO_MAP_VALUE, /* reg points to map element value */ | |
c25b2ae1 | 492 | PTR_TO_MAP_KEY, /* reg points to a map element key */ |
f1174f77 | 493 | PTR_TO_STACK, /* reg == frame_pointer + offset */ |
de8f3a83 | 494 | PTR_TO_PACKET_META, /* skb->data - meta_len */ |
f1174f77 | 495 | PTR_TO_PACKET, /* reg points to skb->data */ |
19de99f7 | 496 | PTR_TO_PACKET_END, /* skb->data + headlen */ |
d58e468b | 497 | PTR_TO_FLOW_KEYS, /* reg points to bpf_flow_keys */ |
c64b7983 | 498 | PTR_TO_SOCKET, /* reg points to struct bpf_sock */ |
46f8bc92 | 499 | PTR_TO_SOCK_COMMON, /* reg points to sock_common */ |
655a51e5 | 500 | PTR_TO_TCP_SOCK, /* reg points to struct tcp_sock */ |
9df1c28b | 501 | PTR_TO_TP_BUFFER, /* reg points to a writable raw tp's buffer */ |
fada7fdc | 502 | PTR_TO_XDP_SOCK, /* reg points to struct xdp_sock */ |
ba5f4cfe JF |
503 | /* PTR_TO_BTF_ID points to a kernel struct that does not need |
504 | * to be null checked by the BPF program. This does not imply the | |
505 | * pointer is _not_ null and in practice this can easily be a null | |
506 | * pointer when reading pointer chains. The assumption is program | |
507 | * context will handle null pointer dereference typically via fault | |
508 | * handling. The verifier must keep this in mind and can make no | |
509 | * assumptions about null or non-null when doing branch analysis. | |
510 | * Further, when passed into helpers the helpers can not, without | |
511 | * additional context, assume the value is non-null. | |
512 | */ | |
513 | PTR_TO_BTF_ID, | |
514 | /* PTR_TO_BTF_ID_OR_NULL points to a kernel struct that has not | |
515 | * been checked for null. Used primarily to inform the verifier | |
516 | * an explicit null check is required for this struct. | |
517 | */ | |
457f4436 | 518 | PTR_TO_MEM, /* reg points to valid memory region */ |
20b2aff4 | 519 | PTR_TO_BUF, /* reg points to a read/write buffer */ |
eaa6bcb7 | 520 | PTR_TO_PERCPU_BTF_ID, /* reg points to a percpu kernel variable */ |
69c087ba | 521 | PTR_TO_FUNC, /* reg points to a bpf program function */ |
e6ac2450 | 522 | __BPF_REG_TYPE_MAX, |
d639b9d1 | 523 | |
c25b2ae1 HL |
524 | /* Extended reg_types. */ |
525 | PTR_TO_MAP_VALUE_OR_NULL = PTR_MAYBE_NULL | PTR_TO_MAP_VALUE, | |
526 | PTR_TO_SOCKET_OR_NULL = PTR_MAYBE_NULL | PTR_TO_SOCKET, | |
527 | PTR_TO_SOCK_COMMON_OR_NULL = PTR_MAYBE_NULL | PTR_TO_SOCK_COMMON, | |
528 | PTR_TO_TCP_SOCK_OR_NULL = PTR_MAYBE_NULL | PTR_TO_TCP_SOCK, | |
529 | PTR_TO_BTF_ID_OR_NULL = PTR_MAYBE_NULL | PTR_TO_BTF_ID, | |
c25b2ae1 | 530 | |
d639b9d1 HL |
531 | /* This must be the last entry. Its purpose is to ensure the enum is |
532 | * wide enough to hold the higher bits reserved for bpf_type_flag. | |
533 | */ | |
534 | __BPF_REG_TYPE_LIMIT = BPF_TYPE_LIMIT, | |
19de99f7 | 535 | }; |
d639b9d1 | 536 | static_assert(__BPF_REG_TYPE_MAX <= BPF_BASE_TYPE_LIMIT); |
19de99f7 | 537 | |
23994631 YS |
538 | /* The information passed from prog-specific *_is_valid_access |
539 | * back to the verifier. | |
540 | */ | |
541 | struct bpf_insn_access_aux { | |
542 | enum bpf_reg_type reg_type; | |
9e15db66 AS |
543 | union { |
544 | int ctx_field_size; | |
22dc4a0f AN |
545 | struct { |
546 | struct btf *btf; | |
547 | u32 btf_id; | |
548 | }; | |
9e15db66 AS |
549 | }; |
550 | struct bpf_verifier_log *log; /* for verbose logs */ | |
23994631 YS |
551 | }; |
552 | ||
f96da094 DB |
553 | static inline void |
554 | bpf_ctx_record_field_size(struct bpf_insn_access_aux *aux, u32 size) | |
555 | { | |
556 | aux->ctx_field_size = size; | |
557 | } | |
558 | ||
3990ed4c MKL |
559 | static inline bool bpf_pseudo_func(const struct bpf_insn *insn) |
560 | { | |
561 | return insn->code == (BPF_LD | BPF_IMM | BPF_DW) && | |
562 | insn->src_reg == BPF_PSEUDO_FUNC; | |
563 | } | |
564 | ||
7de16e3a JK |
565 | struct bpf_prog_ops { |
566 | int (*test_run)(struct bpf_prog *prog, const union bpf_attr *kattr, | |
567 | union bpf_attr __user *uattr); | |
568 | }; | |
569 | ||
09756af4 AS |
570 | struct bpf_verifier_ops { |
571 | /* return eBPF function prototype for verification */ | |
5e43f899 AI |
572 | const struct bpf_func_proto * |
573 | (*get_func_proto)(enum bpf_func_id func_id, | |
574 | const struct bpf_prog *prog); | |
17a52670 AS |
575 | |
576 | /* return true if 'size' wide access at offset 'off' within bpf_context | |
577 | * with 'type' (read or write) is allowed | |
578 | */ | |
19de99f7 | 579 | bool (*is_valid_access)(int off, int size, enum bpf_access_type type, |
5e43f899 | 580 | const struct bpf_prog *prog, |
23994631 | 581 | struct bpf_insn_access_aux *info); |
36bbef52 DB |
582 | int (*gen_prologue)(struct bpf_insn *insn, bool direct_write, |
583 | const struct bpf_prog *prog); | |
e0cea7ce DB |
584 | int (*gen_ld_abs)(const struct bpf_insn *orig, |
585 | struct bpf_insn *insn_buf); | |
6b8cc1d1 DB |
586 | u32 (*convert_ctx_access)(enum bpf_access_type type, |
587 | const struct bpf_insn *src, | |
588 | struct bpf_insn *dst, | |
f96da094 | 589 | struct bpf_prog *prog, u32 *target_size); |
27ae7997 | 590 | int (*btf_struct_access)(struct bpf_verifier_log *log, |
22dc4a0f | 591 | const struct btf *btf, |
27ae7997 MKL |
592 | const struct btf_type *t, int off, int size, |
593 | enum bpf_access_type atype, | |
c6f1bfe8 | 594 | u32 *next_btf_id, enum bpf_type_flag *flag); |
09756af4 AS |
595 | }; |
596 | ||
cae1927c | 597 | struct bpf_prog_offload_ops { |
08ca90af | 598 | /* verifier basic callbacks */ |
cae1927c JK |
599 | int (*insn_hook)(struct bpf_verifier_env *env, |
600 | int insn_idx, int prev_insn_idx); | |
c941ce9c | 601 | int (*finalize)(struct bpf_verifier_env *env); |
08ca90af JK |
602 | /* verifier optimization callbacks (called after .finalize) */ |
603 | int (*replace_insn)(struct bpf_verifier_env *env, u32 off, | |
604 | struct bpf_insn *insn); | |
605 | int (*remove_insns)(struct bpf_verifier_env *env, u32 off, u32 cnt); | |
606 | /* program management callbacks */ | |
16a8cb5c QM |
607 | int (*prepare)(struct bpf_prog *prog); |
608 | int (*translate)(struct bpf_prog *prog); | |
eb911947 | 609 | void (*destroy)(struct bpf_prog *prog); |
cae1927c JK |
610 | }; |
611 | ||
0a9c1991 | 612 | struct bpf_prog_offload { |
ab3f0063 JK |
613 | struct bpf_prog *prog; |
614 | struct net_device *netdev; | |
341b3e7b | 615 | struct bpf_offload_dev *offdev; |
ab3f0063 JK |
616 | void *dev_priv; |
617 | struct list_head offloads; | |
618 | bool dev_state; | |
08ca90af | 619 | bool opt_failed; |
fcfb126d JW |
620 | void *jited_image; |
621 | u32 jited_len; | |
ab3f0063 JK |
622 | }; |
623 | ||
8bad74f9 RG |
624 | enum bpf_cgroup_storage_type { |
625 | BPF_CGROUP_STORAGE_SHARED, | |
b741f163 | 626 | BPF_CGROUP_STORAGE_PERCPU, |
8bad74f9 RG |
627 | __BPF_CGROUP_STORAGE_MAX |
628 | }; | |
629 | ||
630 | #define MAX_BPF_CGROUP_STORAGE_TYPE __BPF_CGROUP_STORAGE_MAX | |
631 | ||
f1b9509c AS |
632 | /* The longest tracepoint has 12 args. |
633 | * See include/trace/bpf_probe.h | |
634 | */ | |
635 | #define MAX_BPF_FUNC_ARGS 12 | |
636 | ||
523a4cf4 DB |
637 | /* The maximum number of arguments passed through registers |
638 | * a single function may have. | |
639 | */ | |
640 | #define MAX_BPF_FUNC_REG_ARGS 5 | |
641 | ||
fec56f58 AS |
642 | struct btf_func_model { |
643 | u8 ret_size; | |
644 | u8 nr_args; | |
645 | u8 arg_size[MAX_BPF_FUNC_ARGS]; | |
646 | }; | |
647 | ||
648 | /* Restore arguments before returning from trampoline to let original function | |
649 | * continue executing. This flag is used for fentry progs when there are no | |
650 | * fexit progs. | |
651 | */ | |
652 | #define BPF_TRAMP_F_RESTORE_REGS BIT(0) | |
653 | /* Call original function after fentry progs, but before fexit progs. | |
654 | * Makes sense for fentry/fexit, normal calls and indirect calls. | |
655 | */ | |
656 | #define BPF_TRAMP_F_CALL_ORIG BIT(1) | |
657 | /* Skip current frame and return to parent. Makes sense for fentry/fexit | |
658 | * programs only. Should not be used with normal calls and indirect calls. | |
659 | */ | |
660 | #define BPF_TRAMP_F_SKIP_FRAME BIT(2) | |
7e6f3cd8 JO |
661 | /* Store IP address of the caller on the trampoline stack, |
662 | * so it's available for trampoline's programs. | |
663 | */ | |
664 | #define BPF_TRAMP_F_IP_ARG BIT(3) | |
356ed649 HT |
665 | /* Return the return value of fentry prog. Only used by bpf_struct_ops. */ |
666 | #define BPF_TRAMP_F_RET_FENTRY_RET BIT(4) | |
7e6f3cd8 | 667 | |
88fd9e53 KS |
668 | /* Each call __bpf_prog_enter + call bpf_func + call __bpf_prog_exit is ~50 |
669 | * bytes on x86. Pick a number to fit into BPF_IMAGE_SIZE / 2 | |
670 | */ | |
ca06f55b | 671 | #define BPF_MAX_TRAMP_PROGS 38 |
88fd9e53 KS |
672 | |
673 | struct bpf_tramp_progs { | |
674 | struct bpf_prog *progs[BPF_MAX_TRAMP_PROGS]; | |
675 | int nr_progs; | |
676 | }; | |
677 | ||
fec56f58 AS |
678 | /* Different use cases for BPF trampoline: |
679 | * 1. replace nop at the function entry (kprobe equivalent) | |
680 | * flags = BPF_TRAMP_F_RESTORE_REGS | |
681 | * fentry = a set of programs to run before returning from trampoline | |
682 | * | |
683 | * 2. replace nop at the function entry (kprobe + kretprobe equivalent) | |
684 | * flags = BPF_TRAMP_F_CALL_ORIG | BPF_TRAMP_F_SKIP_FRAME | |
685 | * orig_call = fentry_ip + MCOUNT_INSN_SIZE | |
686 | * fentry = a set of program to run before calling original function | |
687 | * fexit = a set of program to run after original function | |
688 | * | |
689 | * 3. replace direct call instruction anywhere in the function body | |
690 | * or assign a function pointer for indirect call (like tcp_congestion_ops->cong_avoid) | |
691 | * With flags = 0 | |
692 | * fentry = a set of programs to run before returning from trampoline | |
693 | * With flags = BPF_TRAMP_F_CALL_ORIG | |
694 | * orig_call = original callback addr or direct function addr | |
695 | * fentry = a set of program to run before calling original function | |
696 | * fexit = a set of program to run after original function | |
697 | */ | |
e21aa341 AS |
698 | struct bpf_tramp_image; |
699 | int arch_prepare_bpf_trampoline(struct bpf_tramp_image *tr, void *image, void *image_end, | |
85d33df3 | 700 | const struct btf_func_model *m, u32 flags, |
88fd9e53 | 701 | struct bpf_tramp_progs *tprogs, |
fec56f58 AS |
702 | void *orig_call); |
703 | /* these two functions are called from generated trampoline */ | |
ca06f55b | 704 | u64 notrace __bpf_prog_enter(struct bpf_prog *prog); |
fec56f58 | 705 | void notrace __bpf_prog_exit(struct bpf_prog *prog, u64 start); |
ca06f55b | 706 | u64 notrace __bpf_prog_enter_sleepable(struct bpf_prog *prog); |
f2dd3b39 | 707 | void notrace __bpf_prog_exit_sleepable(struct bpf_prog *prog, u64 start); |
e21aa341 AS |
708 | void notrace __bpf_tramp_enter(struct bpf_tramp_image *tr); |
709 | void notrace __bpf_tramp_exit(struct bpf_tramp_image *tr); | |
fec56f58 | 710 | |
535911c8 JO |
711 | struct bpf_ksym { |
712 | unsigned long start; | |
713 | unsigned long end; | |
bfea9a85 | 714 | char name[KSYM_NAME_LEN]; |
ecb60d1c | 715 | struct list_head lnode; |
ca4424c9 | 716 | struct latch_tree_node tnode; |
cbd76f8d | 717 | bool prog; |
535911c8 JO |
718 | }; |
719 | ||
fec56f58 AS |
720 | enum bpf_tramp_prog_type { |
721 | BPF_TRAMP_FENTRY, | |
722 | BPF_TRAMP_FEXIT, | |
ae240823 | 723 | BPF_TRAMP_MODIFY_RETURN, |
be8704ff AS |
724 | BPF_TRAMP_MAX, |
725 | BPF_TRAMP_REPLACE, /* more than MAX */ | |
fec56f58 AS |
726 | }; |
727 | ||
e21aa341 AS |
728 | struct bpf_tramp_image { |
729 | void *image; | |
730 | struct bpf_ksym ksym; | |
731 | struct percpu_ref pcref; | |
732 | void *ip_after_call; | |
733 | void *ip_epilogue; | |
734 | union { | |
735 | struct rcu_head rcu; | |
736 | struct work_struct work; | |
737 | }; | |
738 | }; | |
739 | ||
fec56f58 AS |
740 | struct bpf_trampoline { |
741 | /* hlist for trampoline_table */ | |
742 | struct hlist_node hlist; | |
743 | /* serializes access to fields of this trampoline */ | |
744 | struct mutex mutex; | |
745 | refcount_t refcnt; | |
746 | u64 key; | |
747 | struct { | |
748 | struct btf_func_model model; | |
749 | void *addr; | |
b91e014f | 750 | bool ftrace_managed; |
fec56f58 | 751 | } func; |
be8704ff AS |
752 | /* if !NULL this is BPF_PROG_TYPE_EXT program that extends another BPF |
753 | * program by replacing one of its functions. func.addr is the address | |
754 | * of the function it replaced. | |
755 | */ | |
756 | struct bpf_prog *extension_prog; | |
fec56f58 AS |
757 | /* list of BPF programs using this trampoline */ |
758 | struct hlist_head progs_hlist[BPF_TRAMP_MAX]; | |
759 | /* Number of attached programs. A counter per kind. */ | |
760 | int progs_cnt[BPF_TRAMP_MAX]; | |
761 | /* Executable image of trampoline */ | |
e21aa341 | 762 | struct bpf_tramp_image *cur_image; |
fec56f58 | 763 | u64 selector; |
861de02e | 764 | struct module *mod; |
fec56f58 | 765 | }; |
75ccbef6 | 766 | |
f7b12b6f THJ |
767 | struct bpf_attach_target_info { |
768 | struct btf_func_model fmodel; | |
769 | long tgt_addr; | |
770 | const char *tgt_name; | |
771 | const struct btf_type *tgt_type; | |
772 | }; | |
773 | ||
116eb788 | 774 | #define BPF_DISPATCHER_MAX 48 /* Fits in 2048B */ |
75ccbef6 BT |
775 | |
776 | struct bpf_dispatcher_prog { | |
777 | struct bpf_prog *prog; | |
778 | refcount_t users; | |
779 | }; | |
780 | ||
781 | struct bpf_dispatcher { | |
782 | /* dispatcher mutex */ | |
783 | struct mutex mutex; | |
784 | void *func; | |
785 | struct bpf_dispatcher_prog progs[BPF_DISPATCHER_MAX]; | |
786 | int num_progs; | |
787 | void *image; | |
788 | u32 image_off; | |
517b75e4 | 789 | struct bpf_ksym ksym; |
75ccbef6 BT |
790 | }; |
791 | ||
9f5b4009 | 792 | static __always_inline __nocfi unsigned int bpf_dispatcher_nop_func( |
7e6897f9 BT |
793 | const void *ctx, |
794 | const struct bpf_insn *insnsi, | |
795 | unsigned int (*bpf_func)(const void *, | |
796 | const struct bpf_insn *)) | |
797 | { | |
798 | return bpf_func(ctx, insnsi); | |
799 | } | |
fec56f58 | 800 | #ifdef CONFIG_BPF_JIT |
3aac1ead THJ |
801 | int bpf_trampoline_link_prog(struct bpf_prog *prog, struct bpf_trampoline *tr); |
802 | int bpf_trampoline_unlink_prog(struct bpf_prog *prog, struct bpf_trampoline *tr); | |
f7b12b6f THJ |
803 | struct bpf_trampoline *bpf_trampoline_get(u64 key, |
804 | struct bpf_attach_target_info *tgt_info); | |
fec56f58 | 805 | void bpf_trampoline_put(struct bpf_trampoline *tr); |
f45b2974 | 806 | int arch_prepare_bpf_dispatcher(void *image, s64 *funcs, int num_funcs); |
517b75e4 JO |
807 | #define BPF_DISPATCHER_INIT(_name) { \ |
808 | .mutex = __MUTEX_INITIALIZER(_name.mutex), \ | |
809 | .func = &_name##_func, \ | |
810 | .progs = {}, \ | |
811 | .num_progs = 0, \ | |
812 | .image = NULL, \ | |
813 | .image_off = 0, \ | |
814 | .ksym = { \ | |
815 | .name = #_name, \ | |
816 | .lnode = LIST_HEAD_INIT(_name.ksym.lnode), \ | |
817 | }, \ | |
75ccbef6 BT |
818 | } |
819 | ||
820 | #define DEFINE_BPF_DISPATCHER(name) \ | |
9f5b4009 | 821 | noinline __nocfi unsigned int bpf_dispatcher_##name##_func( \ |
75ccbef6 BT |
822 | const void *ctx, \ |
823 | const struct bpf_insn *insnsi, \ | |
824 | unsigned int (*bpf_func)(const void *, \ | |
825 | const struct bpf_insn *)) \ | |
826 | { \ | |
827 | return bpf_func(ctx, insnsi); \ | |
828 | } \ | |
6a64037d BT |
829 | EXPORT_SYMBOL(bpf_dispatcher_##name##_func); \ |
830 | struct bpf_dispatcher bpf_dispatcher_##name = \ | |
831 | BPF_DISPATCHER_INIT(bpf_dispatcher_##name); | |
75ccbef6 | 832 | #define DECLARE_BPF_DISPATCHER(name) \ |
6a64037d | 833 | unsigned int bpf_dispatcher_##name##_func( \ |
75ccbef6 BT |
834 | const void *ctx, \ |
835 | const struct bpf_insn *insnsi, \ | |
836 | unsigned int (*bpf_func)(const void *, \ | |
837 | const struct bpf_insn *)); \ | |
6a64037d BT |
838 | extern struct bpf_dispatcher bpf_dispatcher_##name; |
839 | #define BPF_DISPATCHER_FUNC(name) bpf_dispatcher_##name##_func | |
840 | #define BPF_DISPATCHER_PTR(name) (&bpf_dispatcher_##name) | |
75ccbef6 BT |
841 | void bpf_dispatcher_change_prog(struct bpf_dispatcher *d, struct bpf_prog *from, |
842 | struct bpf_prog *to); | |
dba122fb | 843 | /* Called only from JIT-enabled code, so there's no need for stubs. */ |
7ac88eba | 844 | void *bpf_jit_alloc_exec_page(void); |
a108f7dc JO |
845 | void bpf_image_ksym_add(void *data, struct bpf_ksym *ksym); |
846 | void bpf_image_ksym_del(struct bpf_ksym *ksym); | |
dba122fb JO |
847 | void bpf_ksym_add(struct bpf_ksym *ksym); |
848 | void bpf_ksym_del(struct bpf_ksym *ksym); | |
3486bedd SL |
849 | int bpf_jit_charge_modmem(u32 size); |
850 | void bpf_jit_uncharge_modmem(u32 size); | |
f92c1e18 | 851 | bool bpf_prog_has_trampoline(const struct bpf_prog *prog); |
fec56f58 | 852 | #else |
3aac1ead THJ |
853 | static inline int bpf_trampoline_link_prog(struct bpf_prog *prog, |
854 | struct bpf_trampoline *tr) | |
fec56f58 AS |
855 | { |
856 | return -ENOTSUPP; | |
857 | } | |
3aac1ead THJ |
858 | static inline int bpf_trampoline_unlink_prog(struct bpf_prog *prog, |
859 | struct bpf_trampoline *tr) | |
fec56f58 AS |
860 | { |
861 | return -ENOTSUPP; | |
862 | } | |
f7b12b6f THJ |
863 | static inline struct bpf_trampoline *bpf_trampoline_get(u64 key, |
864 | struct bpf_attach_target_info *tgt_info) | |
865 | { | |
866 | return ERR_PTR(-EOPNOTSUPP); | |
867 | } | |
fec56f58 | 868 | static inline void bpf_trampoline_put(struct bpf_trampoline *tr) {} |
75ccbef6 BT |
869 | #define DEFINE_BPF_DISPATCHER(name) |
870 | #define DECLARE_BPF_DISPATCHER(name) | |
6a64037d | 871 | #define BPF_DISPATCHER_FUNC(name) bpf_dispatcher_nop_func |
75ccbef6 BT |
872 | #define BPF_DISPATCHER_PTR(name) NULL |
873 | static inline void bpf_dispatcher_change_prog(struct bpf_dispatcher *d, | |
874 | struct bpf_prog *from, | |
875 | struct bpf_prog *to) {} | |
e9b4e606 JO |
876 | static inline bool is_bpf_image_address(unsigned long address) |
877 | { | |
878 | return false; | |
879 | } | |
f92c1e18 JO |
880 | static inline bool bpf_prog_has_trampoline(const struct bpf_prog *prog) |
881 | { | |
882 | return false; | |
883 | } | |
fec56f58 AS |
884 | #endif |
885 | ||
8c1b6e69 | 886 | struct bpf_func_info_aux { |
51c39bb1 | 887 | u16 linkage; |
8c1b6e69 AS |
888 | bool unreliable; |
889 | }; | |
890 | ||
a66886fe DB |
891 | enum bpf_jit_poke_reason { |
892 | BPF_POKE_REASON_TAIL_CALL, | |
893 | }; | |
894 | ||
895 | /* Descriptor of pokes pointing /into/ the JITed image. */ | |
896 | struct bpf_jit_poke_descriptor { | |
cf71b174 | 897 | void *tailcall_target; |
ebf7d1f5 MF |
898 | void *tailcall_bypass; |
899 | void *bypass_addr; | |
f263a814 | 900 | void *aux; |
a66886fe DB |
901 | union { |
902 | struct { | |
903 | struct bpf_map *map; | |
904 | u32 key; | |
905 | } tail_call; | |
906 | }; | |
cf71b174 | 907 | bool tailcall_target_stable; |
a66886fe DB |
908 | u8 adj_off; |
909 | u16 reason; | |
a748c697 | 910 | u32 insn_idx; |
a66886fe DB |
911 | }; |
912 | ||
3c32cc1b YS |
913 | /* reg_type info for ctx arguments */ |
914 | struct bpf_ctx_arg_aux { | |
915 | u32 offset; | |
916 | enum bpf_reg_type reg_type; | |
951cf368 | 917 | u32 btf_id; |
3c32cc1b YS |
918 | }; |
919 | ||
541c3bad AN |
920 | struct btf_mod_pair { |
921 | struct btf *btf; | |
922 | struct module *module; | |
923 | }; | |
924 | ||
e6ac2450 MKL |
925 | struct bpf_kfunc_desc_tab; |
926 | ||
09756af4 | 927 | struct bpf_prog_aux { |
85192dbf | 928 | atomic64_t refcnt; |
24701ece | 929 | u32 used_map_cnt; |
541c3bad | 930 | u32 used_btf_cnt; |
32bbe007 | 931 | u32 max_ctx_offset; |
e647815a | 932 | u32 max_pkt_offset; |
9df1c28b | 933 | u32 max_tp_access; |
8726679a | 934 | u32 stack_depth; |
dc4bb0e2 | 935 | u32 id; |
ba64e7d8 YS |
936 | u32 func_cnt; /* used by non-func prog as the number of func progs */ |
937 | u32 func_idx; /* 0 for non-func prog, the index in func array for func prog */ | |
ccfe29eb | 938 | u32 attach_btf_id; /* in-kernel BTF type id to attach to */ |
3c32cc1b | 939 | u32 ctx_arg_info_size; |
afbf21dc YS |
940 | u32 max_rdonly_access; |
941 | u32 max_rdwr_access; | |
22dc4a0f | 942 | struct btf *attach_btf; |
3c32cc1b | 943 | const struct bpf_ctx_arg_aux *ctx_arg_info; |
3aac1ead THJ |
944 | struct mutex dst_mutex; /* protects dst_* pointers below, *after* prog becomes visible */ |
945 | struct bpf_prog *dst_prog; | |
946 | struct bpf_trampoline *dst_trampoline; | |
4a1e7c0c THJ |
947 | enum bpf_prog_type saved_dst_prog_type; |
948 | enum bpf_attach_type saved_dst_attach_type; | |
a4b1d3c1 | 949 | bool verifier_zext; /* Zero extensions has been inserted by verifier. */ |
9a18eedb | 950 | bool offload_requested; |
38207291 | 951 | bool attach_btf_trace; /* true if attaching to BTF-enabled raw tp */ |
8c1b6e69 | 952 | bool func_proto_unreliable; |
1e6c62a8 | 953 | bool sleepable; |
ebf7d1f5 | 954 | bool tail_call_reachable; |
c2f2cdbe | 955 | bool xdp_has_frags; |
fec56f58 | 956 | struct hlist_node tramp_hlist; |
38207291 MKL |
957 | /* BTF_KIND_FUNC_PROTO for valid attach_btf_id */ |
958 | const struct btf_type *attach_func_proto; | |
959 | /* function name for valid attach_btf_id */ | |
960 | const char *attach_func_name; | |
1c2a088a AS |
961 | struct bpf_prog **func; |
962 | void *jit_data; /* JIT specific data. arch dependent */ | |
a66886fe | 963 | struct bpf_jit_poke_descriptor *poke_tab; |
e6ac2450 | 964 | struct bpf_kfunc_desc_tab *kfunc_tab; |
2357672c | 965 | struct bpf_kfunc_btf_tab *kfunc_btf_tab; |
a66886fe | 966 | u32 size_poke_tab; |
535911c8 | 967 | struct bpf_ksym ksym; |
7de16e3a | 968 | const struct bpf_prog_ops *ops; |
09756af4 | 969 | struct bpf_map **used_maps; |
984fe94f | 970 | struct mutex used_maps_mutex; /* mutex for used_maps and used_map_cnt */ |
541c3bad | 971 | struct btf_mod_pair *used_btfs; |
09756af4 | 972 | struct bpf_prog *prog; |
aaac3ba9 | 973 | struct user_struct *user; |
cb4d2b3f | 974 | u64 load_time; /* ns since boottime */ |
aba64c7d | 975 | u32 verified_insns; |
8bad74f9 | 976 | struct bpf_map *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE]; |
067cae47 | 977 | char name[BPF_OBJ_NAME_LEN]; |
afdb09c7 CF |
978 | #ifdef CONFIG_SECURITY |
979 | void *security; | |
980 | #endif | |
0a9c1991 | 981 | struct bpf_prog_offload *offload; |
838e9690 | 982 | struct btf *btf; |
ba64e7d8 | 983 | struct bpf_func_info *func_info; |
8c1b6e69 | 984 | struct bpf_func_info_aux *func_info_aux; |
c454a46b MKL |
985 | /* bpf_line_info loaded from userspace. linfo->insn_off |
986 | * has the xlated insn offset. | |
987 | * Both the main and sub prog share the same linfo. | |
988 | * The subprog can access its first linfo by | |
989 | * using the linfo_idx. | |
990 | */ | |
991 | struct bpf_line_info *linfo; | |
992 | /* jited_linfo is the jited addr of the linfo. It has a | |
993 | * one to one mapping to linfo: | |
994 | * jited_linfo[i] is the jited addr for the linfo[i]->insn_off. | |
995 | * Both the main and sub prog share the same jited_linfo. | |
996 | * The subprog can access its first jited_linfo by | |
997 | * using the linfo_idx. | |
998 | */ | |
999 | void **jited_linfo; | |
ba64e7d8 | 1000 | u32 func_info_cnt; |
c454a46b MKL |
1001 | u32 nr_linfo; |
1002 | /* subprog can use linfo_idx to access its first linfo and | |
1003 | * jited_linfo. | |
1004 | * main prog always has linfo_idx == 0 | |
1005 | */ | |
1006 | u32 linfo_idx; | |
3dec541b AS |
1007 | u32 num_exentries; |
1008 | struct exception_table_entry *extable; | |
abf2e7d6 AS |
1009 | union { |
1010 | struct work_struct work; | |
1011 | struct rcu_head rcu; | |
1012 | }; | |
09756af4 AS |
1013 | }; |
1014 | ||
2beee5f5 | 1015 | struct bpf_array_aux { |
da765a2f DB |
1016 | /* Programs with direct jumps into programs part of this array. */ |
1017 | struct list_head poke_progs; | |
1018 | struct bpf_map *map; | |
1019 | struct mutex poke_mutex; | |
1020 | struct work_struct work; | |
2beee5f5 DB |
1021 | }; |
1022 | ||
6cc7d1e8 AN |
1023 | struct bpf_link { |
1024 | atomic64_t refcnt; | |
1025 | u32 id; | |
1026 | enum bpf_link_type type; | |
1027 | const struct bpf_link_ops *ops; | |
1028 | struct bpf_prog *prog; | |
1029 | struct work_struct work; | |
1030 | }; | |
1031 | ||
1032 | struct bpf_link_ops { | |
1033 | void (*release)(struct bpf_link *link); | |
1034 | void (*dealloc)(struct bpf_link *link); | |
73b11c2a | 1035 | int (*detach)(struct bpf_link *link); |
6cc7d1e8 AN |
1036 | int (*update_prog)(struct bpf_link *link, struct bpf_prog *new_prog, |
1037 | struct bpf_prog *old_prog); | |
1038 | void (*show_fdinfo)(const struct bpf_link *link, struct seq_file *seq); | |
1039 | int (*fill_link_info)(const struct bpf_link *link, | |
1040 | struct bpf_link_info *info); | |
1041 | }; | |
1042 | ||
1043 | struct bpf_link_primer { | |
1044 | struct bpf_link *link; | |
1045 | struct file *file; | |
1046 | int fd; | |
1047 | u32 id; | |
1048 | }; | |
1049 | ||
85d33df3 | 1050 | struct bpf_struct_ops_value; |
27ae7997 MKL |
1051 | struct btf_member; |
1052 | ||
1053 | #define BPF_STRUCT_OPS_MAX_NR_MEMBERS 64 | |
1054 | struct bpf_struct_ops { | |
1055 | const struct bpf_verifier_ops *verifier_ops; | |
1056 | int (*init)(struct btf *btf); | |
1057 | int (*check_member)(const struct btf_type *t, | |
1058 | const struct btf_member *member); | |
85d33df3 MKL |
1059 | int (*init_member)(const struct btf_type *t, |
1060 | const struct btf_member *member, | |
1061 | void *kdata, const void *udata); | |
1062 | int (*reg)(void *kdata); | |
1063 | void (*unreg)(void *kdata); | |
27ae7997 | 1064 | const struct btf_type *type; |
85d33df3 | 1065 | const struct btf_type *value_type; |
27ae7997 MKL |
1066 | const char *name; |
1067 | struct btf_func_model func_models[BPF_STRUCT_OPS_MAX_NR_MEMBERS]; | |
1068 | u32 type_id; | |
85d33df3 | 1069 | u32 value_id; |
27ae7997 MKL |
1070 | }; |
1071 | ||
1072 | #if defined(CONFIG_BPF_JIT) && defined(CONFIG_BPF_SYSCALL) | |
85d33df3 | 1073 | #define BPF_MODULE_OWNER ((void *)((0xeB9FUL << 2) + POISON_POINTER_DELTA)) |
27ae7997 | 1074 | const struct bpf_struct_ops *bpf_struct_ops_find(u32 type_id); |
d3e42bb0 | 1075 | void bpf_struct_ops_init(struct btf *btf, struct bpf_verifier_log *log); |
85d33df3 MKL |
1076 | bool bpf_struct_ops_get(const void *kdata); |
1077 | void bpf_struct_ops_put(const void *kdata); | |
1078 | int bpf_struct_ops_map_sys_lookup_elem(struct bpf_map *map, void *key, | |
1079 | void *value); | |
31a645ae HT |
1080 | int bpf_struct_ops_prepare_trampoline(struct bpf_tramp_progs *tprogs, |
1081 | struct bpf_prog *prog, | |
1082 | const struct btf_func_model *model, | |
1083 | void *image, void *image_end); | |
85d33df3 MKL |
1084 | static inline bool bpf_try_module_get(const void *data, struct module *owner) |
1085 | { | |
1086 | if (owner == BPF_MODULE_OWNER) | |
1087 | return bpf_struct_ops_get(data); | |
1088 | else | |
1089 | return try_module_get(owner); | |
1090 | } | |
1091 | static inline void bpf_module_put(const void *data, struct module *owner) | |
1092 | { | |
1093 | if (owner == BPF_MODULE_OWNER) | |
1094 | bpf_struct_ops_put(data); | |
1095 | else | |
1096 | module_put(owner); | |
1097 | } | |
c196906d HT |
1098 | |
1099 | #ifdef CONFIG_NET | |
1100 | /* Define it here to avoid the use of forward declaration */ | |
1101 | struct bpf_dummy_ops_state { | |
1102 | int val; | |
1103 | }; | |
1104 | ||
1105 | struct bpf_dummy_ops { | |
1106 | int (*test_1)(struct bpf_dummy_ops_state *cb); | |
1107 | int (*test_2)(struct bpf_dummy_ops_state *cb, int a1, unsigned short a2, | |
1108 | char a3, unsigned long a4); | |
1109 | }; | |
1110 | ||
1111 | int bpf_struct_ops_test_run(struct bpf_prog *prog, const union bpf_attr *kattr, | |
1112 | union bpf_attr __user *uattr); | |
1113 | #endif | |
27ae7997 MKL |
1114 | #else |
1115 | static inline const struct bpf_struct_ops *bpf_struct_ops_find(u32 type_id) | |
1116 | { | |
1117 | return NULL; | |
1118 | } | |
d3e42bb0 MKL |
1119 | static inline void bpf_struct_ops_init(struct btf *btf, |
1120 | struct bpf_verifier_log *log) | |
1121 | { | |
1122 | } | |
85d33df3 MKL |
1123 | static inline bool bpf_try_module_get(const void *data, struct module *owner) |
1124 | { | |
1125 | return try_module_get(owner); | |
1126 | } | |
1127 | static inline void bpf_module_put(const void *data, struct module *owner) | |
1128 | { | |
1129 | module_put(owner); | |
1130 | } | |
1131 | static inline int bpf_struct_ops_map_sys_lookup_elem(struct bpf_map *map, | |
1132 | void *key, | |
1133 | void *value) | |
1134 | { | |
1135 | return -EINVAL; | |
1136 | } | |
27ae7997 MKL |
1137 | #endif |
1138 | ||
04fd61ab AS |
1139 | struct bpf_array { |
1140 | struct bpf_map map; | |
1141 | u32 elem_size; | |
b2157399 | 1142 | u32 index_mask; |
2beee5f5 | 1143 | struct bpf_array_aux *aux; |
04fd61ab AS |
1144 | union { |
1145 | char value[0] __aligned(8); | |
2a36f0b9 | 1146 | void *ptrs[0] __aligned(8); |
a10423b8 | 1147 | void __percpu *pptrs[0] __aligned(8); |
04fd61ab AS |
1148 | }; |
1149 | }; | |
3b1efb19 | 1150 | |
c04c0d2b | 1151 | #define BPF_COMPLEXITY_LIMIT_INSNS 1000000 /* yes. 1M insns */ |
ebf7f6f0 | 1152 | #define MAX_TAIL_CALL_CNT 33 |
04fd61ab | 1153 | |
591fe988 DB |
1154 | #define BPF_F_ACCESS_MASK (BPF_F_RDONLY | \ |
1155 | BPF_F_RDONLY_PROG | \ | |
1156 | BPF_F_WRONLY | \ | |
1157 | BPF_F_WRONLY_PROG) | |
1158 | ||
1159 | #define BPF_MAP_CAN_READ BIT(0) | |
1160 | #define BPF_MAP_CAN_WRITE BIT(1) | |
1161 | ||
1162 | static inline u32 bpf_map_flags_to_cap(struct bpf_map *map) | |
1163 | { | |
1164 | u32 access_flags = map->map_flags & (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG); | |
1165 | ||
1166 | /* Combination of BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG is | |
1167 | * not possible. | |
1168 | */ | |
1169 | if (access_flags & BPF_F_RDONLY_PROG) | |
1170 | return BPF_MAP_CAN_READ; | |
1171 | else if (access_flags & BPF_F_WRONLY_PROG) | |
1172 | return BPF_MAP_CAN_WRITE; | |
1173 | else | |
1174 | return BPF_MAP_CAN_READ | BPF_MAP_CAN_WRITE; | |
1175 | } | |
1176 | ||
1177 | static inline bool bpf_map_flags_access_ok(u32 access_flags) | |
1178 | { | |
1179 | return (access_flags & (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG)) != | |
1180 | (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG); | |
1181 | } | |
1182 | ||
3b1efb19 DB |
1183 | struct bpf_event_entry { |
1184 | struct perf_event *event; | |
1185 | struct file *perf_file; | |
1186 | struct file *map_file; | |
1187 | struct rcu_head rcu; | |
1188 | }; | |
1189 | ||
f45d5b6c THJ |
1190 | static inline bool map_type_contains_progs(struct bpf_map *map) |
1191 | { | |
1192 | return map->map_type == BPF_MAP_TYPE_PROG_ARRAY || | |
1193 | map->map_type == BPF_MAP_TYPE_DEVMAP || | |
1194 | map->map_type == BPF_MAP_TYPE_CPUMAP; | |
1195 | } | |
1196 | ||
1197 | bool bpf_prog_map_compatible(struct bpf_map *map, const struct bpf_prog *fp); | |
f1f7714e | 1198 | int bpf_prog_calc_tag(struct bpf_prog *fp); |
bd570ff9 | 1199 | |
0756ea3e | 1200 | const struct bpf_func_proto *bpf_get_trace_printk_proto(void); |
10aceb62 | 1201 | const struct bpf_func_proto *bpf_get_trace_vprintk_proto(void); |
555c8a86 DB |
1202 | |
1203 | typedef unsigned long (*bpf_ctx_copy_t)(void *dst, const void *src, | |
aa7145c1 | 1204 | unsigned long off, unsigned long len); |
c64b7983 JS |
1205 | typedef u32 (*bpf_convert_ctx_access_t)(enum bpf_access_type type, |
1206 | const struct bpf_insn *src, | |
1207 | struct bpf_insn *dst, | |
1208 | struct bpf_prog *prog, | |
1209 | u32 *target_size); | |
555c8a86 DB |
1210 | |
1211 | u64 bpf_event_output(struct bpf_map *map, u64 flags, void *meta, u64 meta_size, | |
1212 | void *ctx, u64 ctx_size, bpf_ctx_copy_t ctx_copy); | |
04fd61ab | 1213 | |
324bda9e AS |
1214 | /* an array of programs to be executed under rcu_lock. |
1215 | * | |
1216 | * Typical usage: | |
fb7dd8bc | 1217 | * ret = BPF_PROG_RUN_ARRAY(&bpf_prog_array, ctx, bpf_prog_run); |
324bda9e AS |
1218 | * |
1219 | * the structure returned by bpf_prog_array_alloc() should be populated | |
1220 | * with program pointers and the last pointer must be NULL. | |
1221 | * The user has to keep refcnt on the program and make sure the program | |
1222 | * is removed from the array before bpf_prog_put(). | |
1223 | * The 'struct bpf_prog_array *' should only be replaced with xchg() | |
1224 | * since other cpus are walking the array of pointers in parallel. | |
1225 | */ | |
394e40a2 RG |
1226 | struct bpf_prog_array_item { |
1227 | struct bpf_prog *prog; | |
82e6b1ee AN |
1228 | union { |
1229 | struct bpf_cgroup_storage *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE]; | |
1230 | u64 bpf_cookie; | |
1231 | }; | |
394e40a2 RG |
1232 | }; |
1233 | ||
324bda9e AS |
1234 | struct bpf_prog_array { |
1235 | struct rcu_head rcu; | |
d7f10df8 | 1236 | struct bpf_prog_array_item items[]; |
324bda9e AS |
1237 | }; |
1238 | ||
46531a30 PB |
1239 | struct bpf_empty_prog_array { |
1240 | struct bpf_prog_array hdr; | |
1241 | struct bpf_prog *null_prog; | |
1242 | }; | |
1243 | ||
1244 | /* to avoid allocating empty bpf_prog_array for cgroups that | |
1245 | * don't have bpf program attached use one global 'bpf_empty_prog_array' | |
1246 | * It will not be modified the caller of bpf_prog_array_alloc() | |
1247 | * (since caller requested prog_cnt == 0) | |
1248 | * that pointer should be 'freed' by bpf_prog_array_free() | |
1249 | */ | |
1250 | extern struct bpf_empty_prog_array bpf_empty_prog_array; | |
1251 | ||
d29ab6e1 | 1252 | struct bpf_prog_array *bpf_prog_array_alloc(u32 prog_cnt, gfp_t flags); |
54e9c9d4 SF |
1253 | void bpf_prog_array_free(struct bpf_prog_array *progs); |
1254 | int bpf_prog_array_length(struct bpf_prog_array *progs); | |
0d01da6a | 1255 | bool bpf_prog_array_is_empty(struct bpf_prog_array *array); |
54e9c9d4 | 1256 | int bpf_prog_array_copy_to_user(struct bpf_prog_array *progs, |
468e2f64 | 1257 | __u32 __user *prog_ids, u32 cnt); |
324bda9e | 1258 | |
54e9c9d4 | 1259 | void bpf_prog_array_delete_safe(struct bpf_prog_array *progs, |
e87c6bc3 | 1260 | struct bpf_prog *old_prog); |
ce3aa9cc JS |
1261 | int bpf_prog_array_delete_safe_at(struct bpf_prog_array *array, int index); |
1262 | int bpf_prog_array_update_at(struct bpf_prog_array *array, int index, | |
1263 | struct bpf_prog *prog); | |
54e9c9d4 | 1264 | int bpf_prog_array_copy_info(struct bpf_prog_array *array, |
3a38bb98 YS |
1265 | u32 *prog_ids, u32 request_cnt, |
1266 | u32 *prog_cnt); | |
54e9c9d4 | 1267 | int bpf_prog_array_copy(struct bpf_prog_array *old_array, |
e87c6bc3 YS |
1268 | struct bpf_prog *exclude_prog, |
1269 | struct bpf_prog *include_prog, | |
82e6b1ee | 1270 | u64 bpf_cookie, |
e87c6bc3 YS |
1271 | struct bpf_prog_array **new_array); |
1272 | ||
c7603cfa AN |
1273 | struct bpf_run_ctx {}; |
1274 | ||
1275 | struct bpf_cg_run_ctx { | |
1276 | struct bpf_run_ctx run_ctx; | |
7d08c2c9 | 1277 | const struct bpf_prog_array_item *prog_item; |
c4dcfdd4 | 1278 | int retval; |
c7603cfa AN |
1279 | }; |
1280 | ||
82e6b1ee AN |
1281 | struct bpf_trace_run_ctx { |
1282 | struct bpf_run_ctx run_ctx; | |
1283 | u64 bpf_cookie; | |
1284 | }; | |
1285 | ||
7d08c2c9 AN |
1286 | static inline struct bpf_run_ctx *bpf_set_run_ctx(struct bpf_run_ctx *new_ctx) |
1287 | { | |
1288 | struct bpf_run_ctx *old_ctx = NULL; | |
1289 | ||
1290 | #ifdef CONFIG_BPF_SYSCALL | |
1291 | old_ctx = current->bpf_ctx; | |
1292 | current->bpf_ctx = new_ctx; | |
1293 | #endif | |
1294 | return old_ctx; | |
1295 | } | |
1296 | ||
1297 | static inline void bpf_reset_run_ctx(struct bpf_run_ctx *old_ctx) | |
1298 | { | |
1299 | #ifdef CONFIG_BPF_SYSCALL | |
1300 | current->bpf_ctx = old_ctx; | |
1301 | #endif | |
1302 | } | |
1303 | ||
77241217 SF |
1304 | /* BPF program asks to bypass CAP_NET_BIND_SERVICE in bind. */ |
1305 | #define BPF_RET_BIND_NO_CAP_NET_BIND_SERVICE (1 << 0) | |
1306 | /* BPF program asks to set CN on the packet. */ | |
1307 | #define BPF_RET_SET_CN (1 << 0) | |
1308 | ||
7d08c2c9 AN |
1309 | typedef u32 (*bpf_prog_run_fn)(const struct bpf_prog *prog, const void *ctx); |
1310 | ||
f10d0596 | 1311 | static __always_inline int |
7d08c2c9 AN |
1312 | BPF_PROG_RUN_ARRAY_CG_FLAGS(const struct bpf_prog_array __rcu *array_rcu, |
1313 | const void *ctx, bpf_prog_run_fn run_prog, | |
c4dcfdd4 | 1314 | int retval, u32 *ret_flags) |
7d08c2c9 AN |
1315 | { |
1316 | const struct bpf_prog_array_item *item; | |
1317 | const struct bpf_prog *prog; | |
1318 | const struct bpf_prog_array *array; | |
1319 | struct bpf_run_ctx *old_run_ctx; | |
1320 | struct bpf_cg_run_ctx run_ctx; | |
7d08c2c9 AN |
1321 | u32 func_ret; |
1322 | ||
c4dcfdd4 | 1323 | run_ctx.retval = retval; |
7d08c2c9 AN |
1324 | migrate_disable(); |
1325 | rcu_read_lock(); | |
1326 | array = rcu_dereference(array_rcu); | |
1327 | item = &array->items[0]; | |
1328 | old_run_ctx = bpf_set_run_ctx(&run_ctx.run_ctx); | |
1329 | while ((prog = READ_ONCE(item->prog))) { | |
1330 | run_ctx.prog_item = item; | |
1331 | func_ret = run_prog(prog, ctx); | |
b44123b4 | 1332 | if (!(func_ret & 1) && !IS_ERR_VALUE((long)run_ctx.retval)) |
c4dcfdd4 | 1333 | run_ctx.retval = -EPERM; |
7d08c2c9 AN |
1334 | *(ret_flags) |= (func_ret >> 1); |
1335 | item++; | |
1336 | } | |
1337 | bpf_reset_run_ctx(old_run_ctx); | |
1338 | rcu_read_unlock(); | |
1339 | migrate_enable(); | |
c4dcfdd4 | 1340 | return run_ctx.retval; |
7d08c2c9 AN |
1341 | } |
1342 | ||
f10d0596 | 1343 | static __always_inline int |
7d08c2c9 | 1344 | BPF_PROG_RUN_ARRAY_CG(const struct bpf_prog_array __rcu *array_rcu, |
c4dcfdd4 YZ |
1345 | const void *ctx, bpf_prog_run_fn run_prog, |
1346 | int retval) | |
7d08c2c9 AN |
1347 | { |
1348 | const struct bpf_prog_array_item *item; | |
1349 | const struct bpf_prog *prog; | |
1350 | const struct bpf_prog_array *array; | |
1351 | struct bpf_run_ctx *old_run_ctx; | |
1352 | struct bpf_cg_run_ctx run_ctx; | |
7d08c2c9 | 1353 | |
c4dcfdd4 | 1354 | run_ctx.retval = retval; |
7d08c2c9 AN |
1355 | migrate_disable(); |
1356 | rcu_read_lock(); | |
1357 | array = rcu_dereference(array_rcu); | |
1358 | item = &array->items[0]; | |
1359 | old_run_ctx = bpf_set_run_ctx(&run_ctx.run_ctx); | |
1360 | while ((prog = READ_ONCE(item->prog))) { | |
1361 | run_ctx.prog_item = item; | |
b44123b4 | 1362 | if (!run_prog(prog, ctx) && !IS_ERR_VALUE((long)run_ctx.retval)) |
c4dcfdd4 | 1363 | run_ctx.retval = -EPERM; |
7d08c2c9 AN |
1364 | item++; |
1365 | } | |
1366 | bpf_reset_run_ctx(old_run_ctx); | |
1367 | rcu_read_unlock(); | |
1368 | migrate_enable(); | |
c4dcfdd4 | 1369 | return run_ctx.retval; |
7d08c2c9 AN |
1370 | } |
1371 | ||
1372 | static __always_inline u32 | |
1373 | BPF_PROG_RUN_ARRAY(const struct bpf_prog_array __rcu *array_rcu, | |
1374 | const void *ctx, bpf_prog_run_fn run_prog) | |
1375 | { | |
1376 | const struct bpf_prog_array_item *item; | |
1377 | const struct bpf_prog *prog; | |
1378 | const struct bpf_prog_array *array; | |
82e6b1ee AN |
1379 | struct bpf_run_ctx *old_run_ctx; |
1380 | struct bpf_trace_run_ctx run_ctx; | |
7d08c2c9 AN |
1381 | u32 ret = 1; |
1382 | ||
1383 | migrate_disable(); | |
1384 | rcu_read_lock(); | |
1385 | array = rcu_dereference(array_rcu); | |
1386 | if (unlikely(!array)) | |
1387 | goto out; | |
82e6b1ee | 1388 | old_run_ctx = bpf_set_run_ctx(&run_ctx.run_ctx); |
7d08c2c9 AN |
1389 | item = &array->items[0]; |
1390 | while ((prog = READ_ONCE(item->prog))) { | |
82e6b1ee | 1391 | run_ctx.bpf_cookie = item->bpf_cookie; |
7d08c2c9 AN |
1392 | ret &= run_prog(prog, ctx); |
1393 | item++; | |
1394 | } | |
82e6b1ee | 1395 | bpf_reset_run_ctx(old_run_ctx); |
7d08c2c9 AN |
1396 | out: |
1397 | rcu_read_unlock(); | |
1398 | migrate_enable(); | |
1399 | return ret; | |
1400 | } | |
324bda9e | 1401 | |
1f52f6c0 | 1402 | /* To be used by __cgroup_bpf_run_filter_skb for EGRESS BPF progs |
1403 | * so BPF programs can request cwr for TCP packets. | |
1404 | * | |
1405 | * Current cgroup skb programs can only return 0 or 1 (0 to drop the | |
1406 | * packet. This macro changes the behavior so the low order bit | |
1407 | * indicates whether the packet should be dropped (0) or not (1) | |
1408 | * and the next bit is a congestion notification bit. This could be | |
1409 | * used by TCP to call tcp_enter_cwr() | |
1410 | * | |
1411 | * Hence, new allowed return values of CGROUP EGRESS BPF programs are: | |
1412 | * 0: drop packet | |
1413 | * 1: keep packet | |
1414 | * 2: drop packet and cn | |
1415 | * 3: keep packet and cn | |
1416 | * | |
1417 | * This macro then converts it to one of the NET_XMIT or an error | |
1418 | * code that is then interpreted as drop packet (and no cn): | |
1419 | * 0: NET_XMIT_SUCCESS skb should be transmitted | |
1420 | * 1: NET_XMIT_DROP skb should be dropped and cn | |
1421 | * 2: NET_XMIT_CN skb should be transmitted and cn | |
b44123b4 | 1422 | * 3: -err skb should be dropped |
1f52f6c0 | 1423 | */ |
1424 | #define BPF_PROG_CGROUP_INET_EGRESS_RUN_ARRAY(array, ctx, func) \ | |
1425 | ({ \ | |
77241217 SF |
1426 | u32 _flags = 0; \ |
1427 | bool _cn; \ | |
1428 | u32 _ret; \ | |
c4dcfdd4 | 1429 | _ret = BPF_PROG_RUN_ARRAY_CG_FLAGS(array, ctx, func, 0, &_flags); \ |
77241217 | 1430 | _cn = _flags & BPF_RET_SET_CN; \ |
b44123b4 YZ |
1431 | if (_ret && !IS_ERR_VALUE((long)_ret)) \ |
1432 | _ret = -EFAULT; \ | |
f10d0596 | 1433 | if (!_ret) \ |
1f52f6c0 | 1434 | _ret = (_cn ? NET_XMIT_CN : NET_XMIT_SUCCESS); \ |
1435 | else \ | |
b44123b4 | 1436 | _ret = (_cn ? NET_XMIT_DROP : _ret); \ |
1f52f6c0 | 1437 | _ret; \ |
1438 | }) | |
1439 | ||
89aa0758 | 1440 | #ifdef CONFIG_BPF_SYSCALL |
b121d1e7 | 1441 | DECLARE_PER_CPU(int, bpf_prog_active); |
d46edd67 | 1442 | extern struct mutex bpf_stats_enabled_mutex; |
b121d1e7 | 1443 | |
c518cfa0 TG |
1444 | /* |
1445 | * Block execution of BPF programs attached to instrumentation (perf, | |
1446 | * kprobes, tracepoints) to prevent deadlocks on map operations as any of | |
1447 | * these events can happen inside a region which holds a map bucket lock | |
1448 | * and can deadlock on it. | |
c518cfa0 TG |
1449 | */ |
1450 | static inline void bpf_disable_instrumentation(void) | |
1451 | { | |
1452 | migrate_disable(); | |
79364031 | 1453 | this_cpu_inc(bpf_prog_active); |
c518cfa0 TG |
1454 | } |
1455 | ||
1456 | static inline void bpf_enable_instrumentation(void) | |
1457 | { | |
79364031 | 1458 | this_cpu_dec(bpf_prog_active); |
c518cfa0 TG |
1459 | migrate_enable(); |
1460 | } | |
1461 | ||
f66e448c CF |
1462 | extern const struct file_operations bpf_map_fops; |
1463 | extern const struct file_operations bpf_prog_fops; | |
367ec3e4 | 1464 | extern const struct file_operations bpf_iter_fops; |
f66e448c | 1465 | |
91cc1a99 | 1466 | #define BPF_PROG_TYPE(_id, _name, prog_ctx_type, kern_ctx_type) \ |
7de16e3a JK |
1467 | extern const struct bpf_prog_ops _name ## _prog_ops; \ |
1468 | extern const struct bpf_verifier_ops _name ## _verifier_ops; | |
40077e0c JB |
1469 | #define BPF_MAP_TYPE(_id, _ops) \ |
1470 | extern const struct bpf_map_ops _ops; | |
f2e10bff | 1471 | #define BPF_LINK_TYPE(_id, _name) |
be9370a7 JB |
1472 | #include <linux/bpf_types.h> |
1473 | #undef BPF_PROG_TYPE | |
40077e0c | 1474 | #undef BPF_MAP_TYPE |
f2e10bff | 1475 | #undef BPF_LINK_TYPE |
0fc174de | 1476 | |
ab3f0063 | 1477 | extern const struct bpf_prog_ops bpf_offload_prog_ops; |
4f9218aa JK |
1478 | extern const struct bpf_verifier_ops tc_cls_act_analyzer_ops; |
1479 | extern const struct bpf_verifier_ops xdp_analyzer_ops; | |
1480 | ||
0fc174de | 1481 | struct bpf_prog *bpf_prog_get(u32 ufd); |
248f346f | 1482 | struct bpf_prog *bpf_prog_get_type_dev(u32 ufd, enum bpf_prog_type type, |
288b3de5 | 1483 | bool attach_drv); |
85192dbf | 1484 | void bpf_prog_add(struct bpf_prog *prog, int i); |
c540594f | 1485 | void bpf_prog_sub(struct bpf_prog *prog, int i); |
85192dbf | 1486 | void bpf_prog_inc(struct bpf_prog *prog); |
a6f6df69 | 1487 | struct bpf_prog * __must_check bpf_prog_inc_not_zero(struct bpf_prog *prog); |
61e021f3 DB |
1488 | void bpf_prog_put(struct bpf_prog *prog); |
1489 | ||
ad8ad79f | 1490 | void bpf_prog_free_id(struct bpf_prog *prog, bool do_idr_lock); |
a3884572 | 1491 | void bpf_map_free_id(struct bpf_map *map, bool do_idr_lock); |
ad8ad79f | 1492 | |
1ed4d924 | 1493 | struct bpf_map *bpf_map_get(u32 ufd); |
c9da161c | 1494 | struct bpf_map *bpf_map_get_with_uref(u32 ufd); |
c2101297 | 1495 | struct bpf_map *__bpf_map_get(struct fd f); |
1e0bd5a0 AN |
1496 | void bpf_map_inc(struct bpf_map *map); |
1497 | void bpf_map_inc_with_uref(struct bpf_map *map); | |
1498 | struct bpf_map * __must_check bpf_map_inc_not_zero(struct bpf_map *map); | |
c9da161c | 1499 | void bpf_map_put_with_uref(struct bpf_map *map); |
61e021f3 | 1500 | void bpf_map_put(struct bpf_map *map); |
196e8ca7 DB |
1501 | void *bpf_map_area_alloc(u64 size, int numa_node); |
1502 | void *bpf_map_area_mmapable_alloc(u64 size, int numa_node); | |
d407bd25 | 1503 | void bpf_map_area_free(void *base); |
353050be | 1504 | bool bpf_map_write_active(const struct bpf_map *map); |
bd475643 | 1505 | void bpf_map_init_from_attr(struct bpf_map *map, union bpf_attr *attr); |
cb4d03ab BV |
1506 | int generic_map_lookup_batch(struct bpf_map *map, |
1507 | const union bpf_attr *attr, | |
aa2e93b8 BV |
1508 | union bpf_attr __user *uattr); |
1509 | int generic_map_update_batch(struct bpf_map *map, | |
1510 | const union bpf_attr *attr, | |
1511 | union bpf_attr __user *uattr); | |
1512 | int generic_map_delete_batch(struct bpf_map *map, | |
1513 | const union bpf_attr *attr, | |
cb4d03ab | 1514 | union bpf_attr __user *uattr); |
6086d29d | 1515 | struct bpf_map *bpf_map_get_curr_or_next(u32 *id); |
a228a64f | 1516 | struct bpf_prog *bpf_prog_get_curr_or_next(u32 *id); |
61e021f3 | 1517 | |
48edc1f7 RG |
1518 | #ifdef CONFIG_MEMCG_KMEM |
1519 | void *bpf_map_kmalloc_node(const struct bpf_map *map, size_t size, gfp_t flags, | |
1520 | int node); | |
1521 | void *bpf_map_kzalloc(const struct bpf_map *map, size_t size, gfp_t flags); | |
1522 | void __percpu *bpf_map_alloc_percpu(const struct bpf_map *map, size_t size, | |
1523 | size_t align, gfp_t flags); | |
1524 | #else | |
1525 | static inline void * | |
1526 | bpf_map_kmalloc_node(const struct bpf_map *map, size_t size, gfp_t flags, | |
1527 | int node) | |
1528 | { | |
1529 | return kmalloc_node(size, flags, node); | |
1530 | } | |
1531 | ||
1532 | static inline void * | |
1533 | bpf_map_kzalloc(const struct bpf_map *map, size_t size, gfp_t flags) | |
1534 | { | |
1535 | return kzalloc(size, flags); | |
1536 | } | |
1537 | ||
1538 | static inline void __percpu * | |
1539 | bpf_map_alloc_percpu(const struct bpf_map *map, size_t size, size_t align, | |
1540 | gfp_t flags) | |
1541 | { | |
1542 | return __alloc_percpu_gfp(size, align, flags); | |
1543 | } | |
1544 | #endif | |
1545 | ||
1be7f75d AS |
1546 | extern int sysctl_unprivileged_bpf_disabled; |
1547 | ||
2c78ee89 AS |
1548 | static inline bool bpf_allow_ptr_leaks(void) |
1549 | { | |
1550 | return perfmon_capable(); | |
1551 | } | |
1552 | ||
01f810ac AM |
1553 | static inline bool bpf_allow_uninit_stack(void) |
1554 | { | |
1555 | return perfmon_capable(); | |
1556 | } | |
1557 | ||
41c48f3a AI |
1558 | static inline bool bpf_allow_ptr_to_map_access(void) |
1559 | { | |
1560 | return perfmon_capable(); | |
1561 | } | |
1562 | ||
2c78ee89 AS |
1563 | static inline bool bpf_bypass_spec_v1(void) |
1564 | { | |
1565 | return perfmon_capable(); | |
1566 | } | |
1567 | ||
1568 | static inline bool bpf_bypass_spec_v4(void) | |
1569 | { | |
1570 | return perfmon_capable(); | |
1571 | } | |
1572 | ||
6e71b04a | 1573 | int bpf_map_new_fd(struct bpf_map *map, int flags); |
b2197755 DB |
1574 | int bpf_prog_new_fd(struct bpf_prog *prog); |
1575 | ||
f2e10bff | 1576 | void bpf_link_init(struct bpf_link *link, enum bpf_link_type type, |
a3b80e10 AN |
1577 | const struct bpf_link_ops *ops, struct bpf_prog *prog); |
1578 | int bpf_link_prime(struct bpf_link *link, struct bpf_link_primer *primer); | |
1579 | int bpf_link_settle(struct bpf_link_primer *primer); | |
1580 | void bpf_link_cleanup(struct bpf_link_primer *primer); | |
70ed506c AN |
1581 | void bpf_link_inc(struct bpf_link *link); |
1582 | void bpf_link_put(struct bpf_link *link); | |
1583 | int bpf_link_new_fd(struct bpf_link *link); | |
babf3164 | 1584 | struct file *bpf_link_new_file(struct bpf_link *link, int *reserved_fd); |
70ed506c AN |
1585 | struct bpf_link *bpf_link_get_from_fd(u32 ufd); |
1586 | ||
b2197755 | 1587 | int bpf_obj_pin_user(u32 ufd, const char __user *pathname); |
6e71b04a | 1588 | int bpf_obj_get_user(const char __user *pathname, int flags); |
b2197755 | 1589 | |
21aef70e | 1590 | #define BPF_ITER_FUNC_PREFIX "bpf_iter_" |
e5158d98 | 1591 | #define DEFINE_BPF_ITER_FUNC(target, args...) \ |
21aef70e YS |
1592 | extern int bpf_iter_ ## target(args); \ |
1593 | int __init bpf_iter_ ## target(args) { return 0; } | |
15d83c4d | 1594 | |
f9c79272 | 1595 | struct bpf_iter_aux_info { |
a5cbe05a | 1596 | struct bpf_map *map; |
f9c79272 YS |
1597 | }; |
1598 | ||
5e7b3020 YS |
1599 | typedef int (*bpf_iter_attach_target_t)(struct bpf_prog *prog, |
1600 | union bpf_iter_link_info *linfo, | |
1601 | struct bpf_iter_aux_info *aux); | |
1602 | typedef void (*bpf_iter_detach_target_t)(struct bpf_iter_aux_info *aux); | |
6b0a249a YS |
1603 | typedef void (*bpf_iter_show_fdinfo_t) (const struct bpf_iter_aux_info *aux, |
1604 | struct seq_file *seq); | |
1605 | typedef int (*bpf_iter_fill_link_info_t)(const struct bpf_iter_aux_info *aux, | |
1606 | struct bpf_link_info *info); | |
3cee6fb8 MKL |
1607 | typedef const struct bpf_func_proto * |
1608 | (*bpf_iter_get_func_proto_t)(enum bpf_func_id func_id, | |
1609 | const struct bpf_prog *prog); | |
a5cbe05a | 1610 | |
cf83b2d2 YS |
1611 | enum bpf_iter_feature { |
1612 | BPF_ITER_RESCHED = BIT(0), | |
1613 | }; | |
1614 | ||
3c32cc1b | 1615 | #define BPF_ITER_CTX_ARG_MAX 2 |
ae24345d YS |
1616 | struct bpf_iter_reg { |
1617 | const char *target; | |
5e7b3020 YS |
1618 | bpf_iter_attach_target_t attach_target; |
1619 | bpf_iter_detach_target_t detach_target; | |
6b0a249a YS |
1620 | bpf_iter_show_fdinfo_t show_fdinfo; |
1621 | bpf_iter_fill_link_info_t fill_link_info; | |
3cee6fb8 | 1622 | bpf_iter_get_func_proto_t get_func_proto; |
3c32cc1b | 1623 | u32 ctx_arg_info_size; |
cf83b2d2 | 1624 | u32 feature; |
3c32cc1b | 1625 | struct bpf_ctx_arg_aux ctx_arg_info[BPF_ITER_CTX_ARG_MAX]; |
14fc6bd6 | 1626 | const struct bpf_iter_seq_info *seq_info; |
ae24345d YS |
1627 | }; |
1628 | ||
e5158d98 YS |
1629 | struct bpf_iter_meta { |
1630 | __bpf_md_ptr(struct seq_file *, seq); | |
1631 | u64 session_id; | |
1632 | u64 seq_num; | |
1633 | }; | |
1634 | ||
a5cbe05a YS |
1635 | struct bpf_iter__bpf_map_elem { |
1636 | __bpf_md_ptr(struct bpf_iter_meta *, meta); | |
1637 | __bpf_md_ptr(struct bpf_map *, map); | |
1638 | __bpf_md_ptr(void *, key); | |
1639 | __bpf_md_ptr(void *, value); | |
1640 | }; | |
1641 | ||
15172a46 | 1642 | int bpf_iter_reg_target(const struct bpf_iter_reg *reg_info); |
ab2ee4fc | 1643 | void bpf_iter_unreg_target(const struct bpf_iter_reg *reg_info); |
15d83c4d | 1644 | bool bpf_iter_prog_supported(struct bpf_prog *prog); |
3cee6fb8 MKL |
1645 | const struct bpf_func_proto * |
1646 | bpf_iter_get_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog); | |
af2ac3e1 | 1647 | int bpf_iter_link_attach(const union bpf_attr *attr, bpfptr_t uattr, struct bpf_prog *prog); |
ac51d99b | 1648 | int bpf_iter_new_fd(struct bpf_link *link); |
367ec3e4 | 1649 | bool bpf_link_is_iter(struct bpf_link *link); |
e5158d98 YS |
1650 | struct bpf_prog *bpf_iter_get_info(struct bpf_iter_meta *meta, bool in_stop); |
1651 | int bpf_iter_run_prog(struct bpf_prog *prog, void *ctx); | |
b76f2226 YS |
1652 | void bpf_iter_map_show_fdinfo(const struct bpf_iter_aux_info *aux, |
1653 | struct seq_file *seq); | |
1654 | int bpf_iter_map_fill_link_info(const struct bpf_iter_aux_info *aux, | |
1655 | struct bpf_link_info *info); | |
ae24345d | 1656 | |
314ee05e YS |
1657 | int map_set_for_each_callback_args(struct bpf_verifier_env *env, |
1658 | struct bpf_func_state *caller, | |
1659 | struct bpf_func_state *callee); | |
1660 | ||
15a07b33 AS |
1661 | int bpf_percpu_hash_copy(struct bpf_map *map, void *key, void *value); |
1662 | int bpf_percpu_array_copy(struct bpf_map *map, void *key, void *value); | |
1663 | int bpf_percpu_hash_update(struct bpf_map *map, void *key, void *value, | |
1664 | u64 flags); | |
1665 | int bpf_percpu_array_update(struct bpf_map *map, void *key, void *value, | |
1666 | u64 flags); | |
d056a788 | 1667 | |
557c0c6e | 1668 | int bpf_stackmap_copy(struct bpf_map *map, void *key, void *value); |
15a07b33 | 1669 | |
d056a788 DB |
1670 | int bpf_fd_array_map_update_elem(struct bpf_map *map, struct file *map_file, |
1671 | void *key, void *value, u64 map_flags); | |
14dc6f04 | 1672 | int bpf_fd_array_map_lookup_elem(struct bpf_map *map, void *key, u32 *value); |
bcc6b1b7 MKL |
1673 | int bpf_fd_htab_map_update_elem(struct bpf_map *map, struct file *map_file, |
1674 | void *key, void *value, u64 map_flags); | |
14dc6f04 | 1675 | int bpf_fd_htab_map_lookup_elem(struct bpf_map *map, void *key, u32 *value); |
d056a788 | 1676 | |
6e71b04a | 1677 | int bpf_get_file_flag(int flags); |
af2ac3e1 | 1678 | int bpf_check_uarg_tail_zero(bpfptr_t uaddr, size_t expected_size, |
dcab51f1 | 1679 | size_t actual_size); |
6e71b04a | 1680 | |
15a07b33 AS |
1681 | /* memcpy that is used with 8-byte aligned pointers, power-of-8 size and |
1682 | * forced to use 'long' read/writes to try to atomically copy long counters. | |
1683 | * Best-effort only. No barriers here, since it _will_ race with concurrent | |
1684 | * updates from BPF programs. Called from bpf syscall and mostly used with | |
1685 | * size 8 or 16 bytes, so ask compiler to inline it. | |
1686 | */ | |
1687 | static inline void bpf_long_memcpy(void *dst, const void *src, u32 size) | |
1688 | { | |
1689 | const long *lsrc = src; | |
1690 | long *ldst = dst; | |
1691 | ||
1692 | size /= sizeof(long); | |
1693 | while (size--) | |
1694 | *ldst++ = *lsrc++; | |
1695 | } | |
1696 | ||
61e021f3 | 1697 | /* verify correctness of eBPF program */ |
af2ac3e1 | 1698 | int bpf_check(struct bpf_prog **fp, union bpf_attr *attr, bpfptr_t uattr); |
a643bff7 AN |
1699 | |
1700 | #ifndef CONFIG_BPF_JIT_ALWAYS_ON | |
1ea47e01 | 1701 | void bpf_patch_call_args(struct bpf_insn *insn, u32 stack_depth); |
a643bff7 | 1702 | #endif |
46f55cff | 1703 | |
76654e67 AM |
1704 | struct btf *bpf_get_btf_vmlinux(void); |
1705 | ||
46f55cff | 1706 | /* Map specifics */ |
d53ad5d8 | 1707 | struct xdp_frame; |
6d5fc195 | 1708 | struct sk_buff; |
e6a4750f BT |
1709 | struct bpf_dtab_netdev; |
1710 | struct bpf_cpu_map_entry; | |
67f29e07 | 1711 | |
1d233886 | 1712 | void __dev_flush(void); |
d53ad5d8 | 1713 | int dev_xdp_enqueue(struct net_device *dev, struct xdp_frame *xdpf, |
1d233886 | 1714 | struct net_device *dev_rx); |
d53ad5d8 | 1715 | int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_frame *xdpf, |
38edddb8 | 1716 | struct net_device *dev_rx); |
d53ad5d8 | 1717 | int dev_map_enqueue_multi(struct xdp_frame *xdpf, struct net_device *dev_rx, |
e624d4ed | 1718 | struct bpf_map *map, bool exclude_ingress); |
6d5fc195 TM |
1719 | int dev_map_generic_redirect(struct bpf_dtab_netdev *dst, struct sk_buff *skb, |
1720 | struct bpf_prog *xdp_prog); | |
e624d4ed HL |
1721 | int dev_map_redirect_multi(struct net_device *dev, struct sk_buff *skb, |
1722 | struct bpf_prog *xdp_prog, struct bpf_map *map, | |
1723 | bool exclude_ingress); | |
46f55cff | 1724 | |
cdfafe98 | 1725 | void __cpu_map_flush(void); |
d53ad5d8 | 1726 | int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu, struct xdp_frame *xdpf, |
9c270af3 | 1727 | struct net_device *dev_rx); |
11941f8a KKD |
1728 | int cpu_map_generic_redirect(struct bpf_cpu_map_entry *rcpu, |
1729 | struct sk_buff *skb); | |
9c270af3 | 1730 | |
96eabe7a MKL |
1731 | /* Return map's numa specified by userspace */ |
1732 | static inline int bpf_map_attr_numa_node(const union bpf_attr *attr) | |
1733 | { | |
1734 | return (attr->map_flags & BPF_F_NUMA_NODE) ? | |
1735 | attr->numa_node : NUMA_NO_NODE; | |
1736 | } | |
1737 | ||
040ee692 | 1738 | struct bpf_prog *bpf_prog_get_type_path(const char *name, enum bpf_prog_type type); |
5dc4c4b7 | 1739 | int array_map_alloc_check(union bpf_attr *attr); |
040ee692 | 1740 | |
c695865c SF |
1741 | int bpf_prog_test_run_xdp(struct bpf_prog *prog, const union bpf_attr *kattr, |
1742 | union bpf_attr __user *uattr); | |
1743 | int bpf_prog_test_run_skb(struct bpf_prog *prog, const union bpf_attr *kattr, | |
1744 | union bpf_attr __user *uattr); | |
da00d2f1 KS |
1745 | int bpf_prog_test_run_tracing(struct bpf_prog *prog, |
1746 | const union bpf_attr *kattr, | |
1747 | union bpf_attr __user *uattr); | |
c695865c SF |
1748 | int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog, |
1749 | const union bpf_attr *kattr, | |
1750 | union bpf_attr __user *uattr); | |
1b4d60ec SL |
1751 | int bpf_prog_test_run_raw_tp(struct bpf_prog *prog, |
1752 | const union bpf_attr *kattr, | |
1753 | union bpf_attr __user *uattr); | |
7c32e8f8 LB |
1754 | int bpf_prog_test_run_sk_lookup(struct bpf_prog *prog, |
1755 | const union bpf_attr *kattr, | |
1756 | union bpf_attr __user *uattr); | |
9e15db66 AS |
1757 | bool btf_ctx_access(int off, int size, enum bpf_access_type type, |
1758 | const struct bpf_prog *prog, | |
1759 | struct bpf_insn_access_aux *info); | |
35346ab6 HT |
1760 | |
1761 | static inline bool bpf_tracing_ctx_access(int off, int size, | |
1762 | enum bpf_access_type type) | |
1763 | { | |
1764 | if (off < 0 || off >= sizeof(__u64) * MAX_BPF_FUNC_ARGS) | |
1765 | return false; | |
1766 | if (type != BPF_READ) | |
1767 | return false; | |
1768 | if (off % size != 0) | |
1769 | return false; | |
1770 | return true; | |
1771 | } | |
1772 | ||
1773 | static inline bool bpf_tracing_btf_ctx_access(int off, int size, | |
1774 | enum bpf_access_type type, | |
1775 | const struct bpf_prog *prog, | |
1776 | struct bpf_insn_access_aux *info) | |
1777 | { | |
1778 | if (!bpf_tracing_ctx_access(off, size, type)) | |
1779 | return false; | |
1780 | return btf_ctx_access(off, size, type, prog, info); | |
1781 | } | |
1782 | ||
22dc4a0f | 1783 | int btf_struct_access(struct bpf_verifier_log *log, const struct btf *btf, |
9e15db66 AS |
1784 | const struct btf_type *t, int off, int size, |
1785 | enum bpf_access_type atype, | |
c6f1bfe8 | 1786 | u32 *next_btf_id, enum bpf_type_flag *flag); |
faaf4a79 | 1787 | bool btf_struct_ids_match(struct bpf_verifier_log *log, |
22dc4a0f AN |
1788 | const struct btf *btf, u32 id, int off, |
1789 | const struct btf *need_btf, u32 need_type_id); | |
9e15db66 | 1790 | |
fec56f58 AS |
1791 | int btf_distill_func_proto(struct bpf_verifier_log *log, |
1792 | struct btf *btf, | |
1793 | const struct btf_type *func_proto, | |
1794 | const char *func_name, | |
1795 | struct btf_func_model *m); | |
1796 | ||
51c39bb1 | 1797 | struct bpf_reg_state; |
34747c41 MKL |
1798 | int btf_check_subprog_arg_match(struct bpf_verifier_env *env, int subprog, |
1799 | struct bpf_reg_state *regs); | |
e6ac2450 MKL |
1800 | int btf_check_kfunc_arg_match(struct bpf_verifier_env *env, |
1801 | const struct btf *btf, u32 func_id, | |
1802 | struct bpf_reg_state *regs); | |
51c39bb1 AS |
1803 | int btf_prepare_func_args(struct bpf_verifier_env *env, int subprog, |
1804 | struct bpf_reg_state *reg); | |
efc68158 | 1805 | int btf_check_type_match(struct bpf_verifier_log *log, const struct bpf_prog *prog, |
be8704ff | 1806 | struct btf *btf, const struct btf_type *t); |
8c1b6e69 | 1807 | |
7e6897f9 | 1808 | struct bpf_prog *bpf_prog_by_id(u32 id); |
005142b8 | 1809 | struct bpf_link *bpf_link_by_id(u32 id); |
7e6897f9 | 1810 | |
6890896b | 1811 | const struct bpf_func_proto *bpf_base_func_proto(enum bpf_func_id func_id); |
a10787e6 | 1812 | void bpf_task_storage_free(struct task_struct *task); |
e6ac2450 MKL |
1813 | bool bpf_prog_has_kfunc_call(const struct bpf_prog *prog); |
1814 | const struct btf_func_model * | |
1815 | bpf_jit_find_kfunc_model(const struct bpf_prog *prog, | |
1816 | const struct bpf_insn *insn); | |
fbd94c7a AS |
1817 | struct bpf_core_ctx { |
1818 | struct bpf_verifier_log *log; | |
1819 | const struct btf *btf; | |
1820 | }; | |
1821 | ||
1822 | int bpf_core_apply(struct bpf_core_ctx *ctx, const struct bpf_core_relo *relo, | |
1823 | int relo_idx, void *insn); | |
1824 | ||
9c270af3 | 1825 | #else /* !CONFIG_BPF_SYSCALL */ |
0fc174de DB |
1826 | static inline struct bpf_prog *bpf_prog_get(u32 ufd) |
1827 | { | |
1828 | return ERR_PTR(-EOPNOTSUPP); | |
1829 | } | |
1830 | ||
248f346f JK |
1831 | static inline struct bpf_prog *bpf_prog_get_type_dev(u32 ufd, |
1832 | enum bpf_prog_type type, | |
288b3de5 | 1833 | bool attach_drv) |
248f346f JK |
1834 | { |
1835 | return ERR_PTR(-EOPNOTSUPP); | |
1836 | } | |
1837 | ||
85192dbf | 1838 | static inline void bpf_prog_add(struct bpf_prog *prog, int i) |
cc2e0b3f | 1839 | { |
cc2e0b3f | 1840 | } |
113214be | 1841 | |
c540594f DB |
1842 | static inline void bpf_prog_sub(struct bpf_prog *prog, int i) |
1843 | { | |
1844 | } | |
1845 | ||
0fc174de DB |
1846 | static inline void bpf_prog_put(struct bpf_prog *prog) |
1847 | { | |
1848 | } | |
6d67942d | 1849 | |
85192dbf | 1850 | static inline void bpf_prog_inc(struct bpf_prog *prog) |
aa6a5f3c | 1851 | { |
aa6a5f3c | 1852 | } |
5ccb071e | 1853 | |
a6f6df69 JF |
1854 | static inline struct bpf_prog *__must_check |
1855 | bpf_prog_inc_not_zero(struct bpf_prog *prog) | |
1856 | { | |
1857 | return ERR_PTR(-EOPNOTSUPP); | |
1858 | } | |
1859 | ||
6cc7d1e8 AN |
1860 | static inline void bpf_link_init(struct bpf_link *link, enum bpf_link_type type, |
1861 | const struct bpf_link_ops *ops, | |
1862 | struct bpf_prog *prog) | |
1863 | { | |
1864 | } | |
1865 | ||
1866 | static inline int bpf_link_prime(struct bpf_link *link, | |
1867 | struct bpf_link_primer *primer) | |
1868 | { | |
1869 | return -EOPNOTSUPP; | |
1870 | } | |
1871 | ||
1872 | static inline int bpf_link_settle(struct bpf_link_primer *primer) | |
1873 | { | |
1874 | return -EOPNOTSUPP; | |
1875 | } | |
1876 | ||
1877 | static inline void bpf_link_cleanup(struct bpf_link_primer *primer) | |
1878 | { | |
1879 | } | |
1880 | ||
1881 | static inline void bpf_link_inc(struct bpf_link *link) | |
1882 | { | |
1883 | } | |
1884 | ||
1885 | static inline void bpf_link_put(struct bpf_link *link) | |
1886 | { | |
1887 | } | |
1888 | ||
6e71b04a | 1889 | static inline int bpf_obj_get_user(const char __user *pathname, int flags) |
98589a09 SL |
1890 | { |
1891 | return -EOPNOTSUPP; | |
1892 | } | |
1893 | ||
1d233886 | 1894 | static inline void __dev_flush(void) |
46f55cff JF |
1895 | { |
1896 | } | |
9c270af3 | 1897 | |
d53ad5d8 | 1898 | struct xdp_frame; |
67f29e07 | 1899 | struct bpf_dtab_netdev; |
e6a4750f | 1900 | struct bpf_cpu_map_entry; |
67f29e07 | 1901 | |
1d233886 | 1902 | static inline |
d53ad5d8 | 1903 | int dev_xdp_enqueue(struct net_device *dev, struct xdp_frame *xdpf, |
1d233886 THJ |
1904 | struct net_device *dev_rx) |
1905 | { | |
1906 | return 0; | |
1907 | } | |
1908 | ||
67f29e07 | 1909 | static inline |
d53ad5d8 | 1910 | int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_frame *xdpf, |
38edddb8 | 1911 | struct net_device *dev_rx) |
67f29e07 JDB |
1912 | { |
1913 | return 0; | |
1914 | } | |
1915 | ||
e624d4ed | 1916 | static inline |
d53ad5d8 | 1917 | int dev_map_enqueue_multi(struct xdp_frame *xdpf, struct net_device *dev_rx, |
e624d4ed HL |
1918 | struct bpf_map *map, bool exclude_ingress) |
1919 | { | |
1920 | return 0; | |
1921 | } | |
1922 | ||
6d5fc195 TM |
1923 | struct sk_buff; |
1924 | ||
1925 | static inline int dev_map_generic_redirect(struct bpf_dtab_netdev *dst, | |
1926 | struct sk_buff *skb, | |
1927 | struct bpf_prog *xdp_prog) | |
1928 | { | |
1929 | return 0; | |
1930 | } | |
1931 | ||
e624d4ed HL |
1932 | static inline |
1933 | int dev_map_redirect_multi(struct net_device *dev, struct sk_buff *skb, | |
1934 | struct bpf_prog *xdp_prog, struct bpf_map *map, | |
1935 | bool exclude_ingress) | |
1936 | { | |
1937 | return 0; | |
1938 | } | |
1939 | ||
cdfafe98 | 1940 | static inline void __cpu_map_flush(void) |
9c270af3 JDB |
1941 | { |
1942 | } | |
1943 | ||
9c270af3 | 1944 | static inline int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu, |
d53ad5d8 | 1945 | struct xdp_frame *xdpf, |
9c270af3 JDB |
1946 | struct net_device *dev_rx) |
1947 | { | |
1948 | return 0; | |
1949 | } | |
040ee692 | 1950 | |
11941f8a KKD |
1951 | static inline int cpu_map_generic_redirect(struct bpf_cpu_map_entry *rcpu, |
1952 | struct sk_buff *skb) | |
1953 | { | |
1954 | return -EOPNOTSUPP; | |
1955 | } | |
1956 | ||
040ee692 AV |
1957 | static inline struct bpf_prog *bpf_prog_get_type_path(const char *name, |
1958 | enum bpf_prog_type type) | |
1959 | { | |
1960 | return ERR_PTR(-EOPNOTSUPP); | |
1961 | } | |
c695865c SF |
1962 | |
1963 | static inline int bpf_prog_test_run_xdp(struct bpf_prog *prog, | |
1964 | const union bpf_attr *kattr, | |
1965 | union bpf_attr __user *uattr) | |
1966 | { | |
1967 | return -ENOTSUPP; | |
1968 | } | |
1969 | ||
1970 | static inline int bpf_prog_test_run_skb(struct bpf_prog *prog, | |
1971 | const union bpf_attr *kattr, | |
1972 | union bpf_attr __user *uattr) | |
1973 | { | |
1974 | return -ENOTSUPP; | |
1975 | } | |
1976 | ||
da00d2f1 KS |
1977 | static inline int bpf_prog_test_run_tracing(struct bpf_prog *prog, |
1978 | const union bpf_attr *kattr, | |
1979 | union bpf_attr __user *uattr) | |
1980 | { | |
1981 | return -ENOTSUPP; | |
1982 | } | |
1983 | ||
c695865c SF |
1984 | static inline int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog, |
1985 | const union bpf_attr *kattr, | |
1986 | union bpf_attr __user *uattr) | |
1987 | { | |
1988 | return -ENOTSUPP; | |
1989 | } | |
6332be04 | 1990 | |
7c32e8f8 LB |
1991 | static inline int bpf_prog_test_run_sk_lookup(struct bpf_prog *prog, |
1992 | const union bpf_attr *kattr, | |
1993 | union bpf_attr __user *uattr) | |
1994 | { | |
1995 | return -ENOTSUPP; | |
1996 | } | |
1997 | ||
6332be04 DB |
1998 | static inline void bpf_map_put(struct bpf_map *map) |
1999 | { | |
2000 | } | |
7e6897f9 BT |
2001 | |
2002 | static inline struct bpf_prog *bpf_prog_by_id(u32 id) | |
2003 | { | |
2004 | return ERR_PTR(-ENOTSUPP); | |
2005 | } | |
6890896b SF |
2006 | |
2007 | static inline const struct bpf_func_proto * | |
2008 | bpf_base_func_proto(enum bpf_func_id func_id) | |
2009 | { | |
2010 | return NULL; | |
2011 | } | |
a10787e6 SL |
2012 | |
2013 | static inline void bpf_task_storage_free(struct task_struct *task) | |
2014 | { | |
2015 | } | |
e6ac2450 MKL |
2016 | |
2017 | static inline bool bpf_prog_has_kfunc_call(const struct bpf_prog *prog) | |
2018 | { | |
2019 | return false; | |
2020 | } | |
2021 | ||
2022 | static inline const struct btf_func_model * | |
2023 | bpf_jit_find_kfunc_model(const struct bpf_prog *prog, | |
2024 | const struct bpf_insn *insn) | |
2025 | { | |
2026 | return NULL; | |
2027 | } | |
61e021f3 | 2028 | #endif /* CONFIG_BPF_SYSCALL */ |
09756af4 | 2029 | |
541c3bad AN |
2030 | void __bpf_free_used_btfs(struct bpf_prog_aux *aux, |
2031 | struct btf_mod_pair *used_btfs, u32 len); | |
2032 | ||
479321e9 JK |
2033 | static inline struct bpf_prog *bpf_prog_get_type(u32 ufd, |
2034 | enum bpf_prog_type type) | |
2035 | { | |
2036 | return bpf_prog_get_type_dev(ufd, type, false); | |
2037 | } | |
2038 | ||
936f8946 AN |
2039 | void __bpf_free_used_maps(struct bpf_prog_aux *aux, |
2040 | struct bpf_map **used_maps, u32 len); | |
2041 | ||
040ee692 AV |
2042 | bool bpf_prog_get_ok(struct bpf_prog *, enum bpf_prog_type *, bool); |
2043 | ||
ab3f0063 JK |
2044 | int bpf_prog_offload_compile(struct bpf_prog *prog); |
2045 | void bpf_prog_offload_destroy(struct bpf_prog *prog); | |
675fc275 JK |
2046 | int bpf_prog_offload_info_fill(struct bpf_prog_info *info, |
2047 | struct bpf_prog *prog); | |
ab3f0063 | 2048 | |
52775b33 JK |
2049 | int bpf_map_offload_info_fill(struct bpf_map_info *info, struct bpf_map *map); |
2050 | ||
a3884572 JK |
2051 | int bpf_map_offload_lookup_elem(struct bpf_map *map, void *key, void *value); |
2052 | int bpf_map_offload_update_elem(struct bpf_map *map, | |
2053 | void *key, void *value, u64 flags); | |
2054 | int bpf_map_offload_delete_elem(struct bpf_map *map, void *key); | |
2055 | int bpf_map_offload_get_next_key(struct bpf_map *map, | |
2056 | void *key, void *next_key); | |
2057 | ||
09728266 | 2058 | bool bpf_offload_prog_map_match(struct bpf_prog *prog, struct bpf_map *map); |
a3884572 | 2059 | |
1385d755 | 2060 | struct bpf_offload_dev * |
dd27c2e3 | 2061 | bpf_offload_dev_create(const struct bpf_prog_offload_ops *ops, void *priv); |
602144c2 | 2062 | void bpf_offload_dev_destroy(struct bpf_offload_dev *offdev); |
dd27c2e3 | 2063 | void *bpf_offload_dev_priv(struct bpf_offload_dev *offdev); |
602144c2 JK |
2064 | int bpf_offload_dev_netdev_register(struct bpf_offload_dev *offdev, |
2065 | struct net_device *netdev); | |
2066 | void bpf_offload_dev_netdev_unregister(struct bpf_offload_dev *offdev, | |
2067 | struct net_device *netdev); | |
fd4f227d | 2068 | bool bpf_offload_dev_match(struct bpf_prog *prog, struct net_device *netdev); |
9fd7c555 | 2069 | |
ab3f0063 JK |
2070 | #if defined(CONFIG_NET) && defined(CONFIG_BPF_SYSCALL) |
2071 | int bpf_prog_offload_init(struct bpf_prog *prog, union bpf_attr *attr); | |
2072 | ||
0d830032 | 2073 | static inline bool bpf_prog_is_dev_bound(const struct bpf_prog_aux *aux) |
ab3f0063 | 2074 | { |
9a18eedb | 2075 | return aux->offload_requested; |
ab3f0063 | 2076 | } |
a3884572 JK |
2077 | |
2078 | static inline bool bpf_map_is_dev_bound(struct bpf_map *map) | |
2079 | { | |
2080 | return unlikely(map->ops == &bpf_map_offload_ops); | |
2081 | } | |
2082 | ||
2083 | struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr); | |
2084 | void bpf_map_offload_map_free(struct bpf_map *map); | |
79a7f8bd AS |
2085 | int bpf_prog_test_run_syscall(struct bpf_prog *prog, |
2086 | const union bpf_attr *kattr, | |
2087 | union bpf_attr __user *uattr); | |
17edea21 CW |
2088 | |
2089 | int sock_map_get_from_fd(const union bpf_attr *attr, struct bpf_prog *prog); | |
2090 | int sock_map_prog_detach(const union bpf_attr *attr, enum bpf_prog_type ptype); | |
2091 | int sock_map_update_elem_sys(struct bpf_map *map, void *key, void *value, u64 flags); | |
748cd572 DZ |
2092 | int sock_map_bpf_prog_query(const union bpf_attr *attr, |
2093 | union bpf_attr __user *uattr); | |
2094 | ||
17edea21 CW |
2095 | void sock_map_unhash(struct sock *sk); |
2096 | void sock_map_close(struct sock *sk, long timeout); | |
ab3f0063 JK |
2097 | #else |
2098 | static inline int bpf_prog_offload_init(struct bpf_prog *prog, | |
2099 | union bpf_attr *attr) | |
2100 | { | |
2101 | return -EOPNOTSUPP; | |
2102 | } | |
2103 | ||
2104 | static inline bool bpf_prog_is_dev_bound(struct bpf_prog_aux *aux) | |
2105 | { | |
2106 | return false; | |
2107 | } | |
a3884572 JK |
2108 | |
2109 | static inline bool bpf_map_is_dev_bound(struct bpf_map *map) | |
2110 | { | |
2111 | return false; | |
2112 | } | |
2113 | ||
2114 | static inline struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr) | |
2115 | { | |
2116 | return ERR_PTR(-EOPNOTSUPP); | |
2117 | } | |
2118 | ||
2119 | static inline void bpf_map_offload_map_free(struct bpf_map *map) | |
2120 | { | |
2121 | } | |
79a7f8bd AS |
2122 | |
2123 | static inline int bpf_prog_test_run_syscall(struct bpf_prog *prog, | |
2124 | const union bpf_attr *kattr, | |
2125 | union bpf_attr __user *uattr) | |
2126 | { | |
2127 | return -ENOTSUPP; | |
2128 | } | |
fdb5c453 | 2129 | |
88759609 | 2130 | #ifdef CONFIG_BPF_SYSCALL |
604326b4 DB |
2131 | static inline int sock_map_get_from_fd(const union bpf_attr *attr, |
2132 | struct bpf_prog *prog) | |
fdb5c453 SY |
2133 | { |
2134 | return -EINVAL; | |
2135 | } | |
bb0de313 LB |
2136 | |
2137 | static inline int sock_map_prog_detach(const union bpf_attr *attr, | |
2138 | enum bpf_prog_type ptype) | |
2139 | { | |
2140 | return -EOPNOTSUPP; | |
2141 | } | |
13b79d3f LB |
2142 | |
2143 | static inline int sock_map_update_elem_sys(struct bpf_map *map, void *key, void *value, | |
2144 | u64 flags) | |
2145 | { | |
2146 | return -EOPNOTSUPP; | |
2147 | } | |
748cd572 DZ |
2148 | |
2149 | static inline int sock_map_bpf_prog_query(const union bpf_attr *attr, | |
2150 | union bpf_attr __user *uattr) | |
2151 | { | |
2152 | return -EINVAL; | |
2153 | } | |
17edea21 CW |
2154 | #endif /* CONFIG_BPF_SYSCALL */ |
2155 | #endif /* CONFIG_NET && CONFIG_BPF_SYSCALL */ | |
5dc4c4b7 | 2156 | |
17edea21 CW |
2157 | #if defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL) |
2158 | void bpf_sk_reuseport_detach(struct sock *sk); | |
2159 | int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map, void *key, | |
2160 | void *value); | |
2161 | int bpf_fd_reuseport_array_update_elem(struct bpf_map *map, void *key, | |
2162 | void *value, u64 map_flags); | |
2163 | #else | |
2164 | static inline void bpf_sk_reuseport_detach(struct sock *sk) | |
2165 | { | |
2166 | } | |
5dc4c4b7 | 2167 | |
17edea21 | 2168 | #ifdef CONFIG_BPF_SYSCALL |
5dc4c4b7 MKL |
2169 | static inline int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map, |
2170 | void *key, void *value) | |
2171 | { | |
2172 | return -EOPNOTSUPP; | |
2173 | } | |
2174 | ||
2175 | static inline int bpf_fd_reuseport_array_update_elem(struct bpf_map *map, | |
2176 | void *key, void *value, | |
2177 | u64 map_flags) | |
2178 | { | |
2179 | return -EOPNOTSUPP; | |
2180 | } | |
2181 | #endif /* CONFIG_BPF_SYSCALL */ | |
2182 | #endif /* defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL) */ | |
2183 | ||
d0003ec0 | 2184 | /* verifier prototypes for helper functions called from eBPF programs */ |
a2c83fff DB |
2185 | extern const struct bpf_func_proto bpf_map_lookup_elem_proto; |
2186 | extern const struct bpf_func_proto bpf_map_update_elem_proto; | |
2187 | extern const struct bpf_func_proto bpf_map_delete_elem_proto; | |
f1a2e44a MV |
2188 | extern const struct bpf_func_proto bpf_map_push_elem_proto; |
2189 | extern const struct bpf_func_proto bpf_map_pop_elem_proto; | |
2190 | extern const struct bpf_func_proto bpf_map_peek_elem_proto; | |
d0003ec0 | 2191 | |
03e69b50 | 2192 | extern const struct bpf_func_proto bpf_get_prandom_u32_proto; |
c04167ce | 2193 | extern const struct bpf_func_proto bpf_get_smp_processor_id_proto; |
2d0e30c3 | 2194 | extern const struct bpf_func_proto bpf_get_numa_node_id_proto; |
04fd61ab | 2195 | extern const struct bpf_func_proto bpf_tail_call_proto; |
17ca8cbf | 2196 | extern const struct bpf_func_proto bpf_ktime_get_ns_proto; |
71d19214 | 2197 | extern const struct bpf_func_proto bpf_ktime_get_boot_ns_proto; |
ffeedafb AS |
2198 | extern const struct bpf_func_proto bpf_get_current_pid_tgid_proto; |
2199 | extern const struct bpf_func_proto bpf_get_current_uid_gid_proto; | |
2200 | extern const struct bpf_func_proto bpf_get_current_comm_proto; | |
d5a3b1f6 | 2201 | extern const struct bpf_func_proto bpf_get_stackid_proto; |
c195651e | 2202 | extern const struct bpf_func_proto bpf_get_stack_proto; |
fa28dcb8 | 2203 | extern const struct bpf_func_proto bpf_get_task_stack_proto; |
7b04d6d6 SL |
2204 | extern const struct bpf_func_proto bpf_get_stackid_proto_pe; |
2205 | extern const struct bpf_func_proto bpf_get_stack_proto_pe; | |
174a79ff | 2206 | extern const struct bpf_func_proto bpf_sock_map_update_proto; |
81110384 | 2207 | extern const struct bpf_func_proto bpf_sock_hash_update_proto; |
bf6fa2c8 | 2208 | extern const struct bpf_func_proto bpf_get_current_cgroup_id_proto; |
0f09abd1 | 2209 | extern const struct bpf_func_proto bpf_get_current_ancestor_cgroup_id_proto; |
604326b4 DB |
2210 | extern const struct bpf_func_proto bpf_msg_redirect_hash_proto; |
2211 | extern const struct bpf_func_proto bpf_msg_redirect_map_proto; | |
2212 | extern const struct bpf_func_proto bpf_sk_redirect_hash_proto; | |
2213 | extern const struct bpf_func_proto bpf_sk_redirect_map_proto; | |
d83525ca AS |
2214 | extern const struct bpf_func_proto bpf_spin_lock_proto; |
2215 | extern const struct bpf_func_proto bpf_spin_unlock_proto; | |
cd339431 | 2216 | extern const struct bpf_func_proto bpf_get_local_storage_proto; |
d7a4cb9b AI |
2217 | extern const struct bpf_func_proto bpf_strtol_proto; |
2218 | extern const struct bpf_func_proto bpf_strtoul_proto; | |
0d01da6a | 2219 | extern const struct bpf_func_proto bpf_tcp_sock_proto; |
5576b991 | 2220 | extern const struct bpf_func_proto bpf_jiffies64_proto; |
b4490c5c | 2221 | extern const struct bpf_func_proto bpf_get_ns_current_pid_tgid_proto; |
0456ea17 | 2222 | extern const struct bpf_func_proto bpf_event_output_data_proto; |
457f4436 AN |
2223 | extern const struct bpf_func_proto bpf_ringbuf_output_proto; |
2224 | extern const struct bpf_func_proto bpf_ringbuf_reserve_proto; | |
2225 | extern const struct bpf_func_proto bpf_ringbuf_submit_proto; | |
2226 | extern const struct bpf_func_proto bpf_ringbuf_discard_proto; | |
2227 | extern const struct bpf_func_proto bpf_ringbuf_query_proto; | |
af7ec138 | 2228 | extern const struct bpf_func_proto bpf_skc_to_tcp6_sock_proto; |
478cfbdf YS |
2229 | extern const struct bpf_func_proto bpf_skc_to_tcp_sock_proto; |
2230 | extern const struct bpf_func_proto bpf_skc_to_tcp_timewait_sock_proto; | |
2231 | extern const struct bpf_func_proto bpf_skc_to_tcp_request_sock_proto; | |
0d4fad3e | 2232 | extern const struct bpf_func_proto bpf_skc_to_udp6_sock_proto; |
9eeb3aa3 | 2233 | extern const struct bpf_func_proto bpf_skc_to_unix_sock_proto; |
07be4c4a | 2234 | extern const struct bpf_func_proto bpf_copy_from_user_proto; |
c4d0bfb4 | 2235 | extern const struct bpf_func_proto bpf_snprintf_btf_proto; |
7b15523a | 2236 | extern const struct bpf_func_proto bpf_snprintf_proto; |
eaa6bcb7 | 2237 | extern const struct bpf_func_proto bpf_per_cpu_ptr_proto; |
63d9b80d | 2238 | extern const struct bpf_func_proto bpf_this_cpu_ptr_proto; |
d0551261 | 2239 | extern const struct bpf_func_proto bpf_ktime_get_coarse_ns_proto; |
b60da495 | 2240 | extern const struct bpf_func_proto bpf_sock_from_file_proto; |
c5dbb89f | 2241 | extern const struct bpf_func_proto bpf_get_socket_ptr_cookie_proto; |
a10787e6 SL |
2242 | extern const struct bpf_func_proto bpf_task_storage_get_proto; |
2243 | extern const struct bpf_func_proto bpf_task_storage_delete_proto; | |
69c087ba | 2244 | extern const struct bpf_func_proto bpf_for_each_map_elem_proto; |
3d78417b | 2245 | extern const struct bpf_func_proto bpf_btf_find_by_name_kind_proto; |
3cee6fb8 MKL |
2246 | extern const struct bpf_func_proto bpf_sk_setsockopt_proto; |
2247 | extern const struct bpf_func_proto bpf_sk_getsockopt_proto; | |
d6aef08a | 2248 | extern const struct bpf_func_proto bpf_kallsyms_lookup_name_proto; |
7c7e3d31 | 2249 | extern const struct bpf_func_proto bpf_find_vma_proto; |
e6f2dd0f | 2250 | extern const struct bpf_func_proto bpf_loop_proto; |
c5fb1993 | 2251 | extern const struct bpf_func_proto bpf_strncmp_proto; |
376040e4 | 2252 | extern const struct bpf_func_proto bpf_copy_from_user_task_proto; |
cd339431 | 2253 | |
958a3f2d JO |
2254 | const struct bpf_func_proto *tracing_prog_func_proto( |
2255 | enum bpf_func_id func_id, const struct bpf_prog *prog); | |
2256 | ||
3ad00405 DB |
2257 | /* Shared helpers among cBPF and eBPF. */ |
2258 | void bpf_user_rnd_init_once(void); | |
2259 | u64 bpf_user_rnd_u32(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5); | |
6890896b | 2260 | u64 bpf_get_raw_cpu_id(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5); |
3ad00405 | 2261 | |
c64b7983 | 2262 | #if defined(CONFIG_NET) |
46f8bc92 MKL |
2263 | bool bpf_sock_common_is_valid_access(int off, int size, |
2264 | enum bpf_access_type type, | |
2265 | struct bpf_insn_access_aux *info); | |
c64b7983 JS |
2266 | bool bpf_sock_is_valid_access(int off, int size, enum bpf_access_type type, |
2267 | struct bpf_insn_access_aux *info); | |
2268 | u32 bpf_sock_convert_ctx_access(enum bpf_access_type type, | |
2269 | const struct bpf_insn *si, | |
2270 | struct bpf_insn *insn_buf, | |
2271 | struct bpf_prog *prog, | |
2272 | u32 *target_size); | |
2273 | #else | |
46f8bc92 MKL |
2274 | static inline bool bpf_sock_common_is_valid_access(int off, int size, |
2275 | enum bpf_access_type type, | |
2276 | struct bpf_insn_access_aux *info) | |
2277 | { | |
2278 | return false; | |
2279 | } | |
c64b7983 JS |
2280 | static inline bool bpf_sock_is_valid_access(int off, int size, |
2281 | enum bpf_access_type type, | |
2282 | struct bpf_insn_access_aux *info) | |
2283 | { | |
2284 | return false; | |
2285 | } | |
2286 | static inline u32 bpf_sock_convert_ctx_access(enum bpf_access_type type, | |
2287 | const struct bpf_insn *si, | |
2288 | struct bpf_insn *insn_buf, | |
2289 | struct bpf_prog *prog, | |
2290 | u32 *target_size) | |
2291 | { | |
2292 | return 0; | |
2293 | } | |
2294 | #endif | |
2295 | ||
655a51e5 | 2296 | #ifdef CONFIG_INET |
91cc1a99 AS |
2297 | struct sk_reuseport_kern { |
2298 | struct sk_buff *skb; | |
2299 | struct sock *sk; | |
2300 | struct sock *selected_sk; | |
d5e4ddae | 2301 | struct sock *migrating_sk; |
91cc1a99 AS |
2302 | void *data_end; |
2303 | u32 hash; | |
2304 | u32 reuseport_id; | |
2305 | bool bind_inany; | |
2306 | }; | |
655a51e5 MKL |
2307 | bool bpf_tcp_sock_is_valid_access(int off, int size, enum bpf_access_type type, |
2308 | struct bpf_insn_access_aux *info); | |
2309 | ||
2310 | u32 bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type, | |
2311 | const struct bpf_insn *si, | |
2312 | struct bpf_insn *insn_buf, | |
2313 | struct bpf_prog *prog, | |
2314 | u32 *target_size); | |
7f94208c Y |
2315 | |
2316 | bool bpf_xdp_sock_is_valid_access(int off, int size, enum bpf_access_type type, | |
2317 | struct bpf_insn_access_aux *info); | |
2318 | ||
2319 | u32 bpf_xdp_sock_convert_ctx_access(enum bpf_access_type type, | |
2320 | const struct bpf_insn *si, | |
2321 | struct bpf_insn *insn_buf, | |
2322 | struct bpf_prog *prog, | |
2323 | u32 *target_size); | |
655a51e5 MKL |
2324 | #else |
2325 | static inline bool bpf_tcp_sock_is_valid_access(int off, int size, | |
2326 | enum bpf_access_type type, | |
2327 | struct bpf_insn_access_aux *info) | |
2328 | { | |
2329 | return false; | |
2330 | } | |
2331 | ||
2332 | static inline u32 bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type, | |
2333 | const struct bpf_insn *si, | |
2334 | struct bpf_insn *insn_buf, | |
2335 | struct bpf_prog *prog, | |
2336 | u32 *target_size) | |
2337 | { | |
2338 | return 0; | |
2339 | } | |
7f94208c Y |
2340 | static inline bool bpf_xdp_sock_is_valid_access(int off, int size, |
2341 | enum bpf_access_type type, | |
2342 | struct bpf_insn_access_aux *info) | |
2343 | { | |
2344 | return false; | |
2345 | } | |
2346 | ||
2347 | static inline u32 bpf_xdp_sock_convert_ctx_access(enum bpf_access_type type, | |
2348 | const struct bpf_insn *si, | |
2349 | struct bpf_insn *insn_buf, | |
2350 | struct bpf_prog *prog, | |
2351 | u32 *target_size) | |
2352 | { | |
2353 | return 0; | |
2354 | } | |
655a51e5 MKL |
2355 | #endif /* CONFIG_INET */ |
2356 | ||
5964b200 | 2357 | enum bpf_text_poke_type { |
b553a6ec DB |
2358 | BPF_MOD_CALL, |
2359 | BPF_MOD_JUMP, | |
5964b200 | 2360 | }; |
4b3da77b | 2361 | |
5964b200 AS |
2362 | int bpf_arch_text_poke(void *ip, enum bpf_text_poke_type t, |
2363 | void *addr1, void *addr2); | |
2364 | ||
eae2e83e | 2365 | struct btf_id_set; |
2af30f11 | 2366 | bool btf_id_set_contains(const struct btf_id_set *set, u32 id); |
eae2e83e | 2367 | |
335ff499 DM |
2368 | #define MAX_BPRINTF_VARARGS 12 |
2369 | ||
48cac3f4 FR |
2370 | int bpf_bprintf_prepare(char *fmt, u32 fmt_size, const u64 *raw_args, |
2371 | u32 **bin_buf, u32 num_args); | |
2372 | void bpf_bprintf_cleanup(void); | |
d9c9e4db | 2373 | |
99c55f7d | 2374 | #endif /* _LINUX_BPF_H */ |