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> | |
d687f621 | 8 | #include <uapi/linux/filter.h> |
74451e66 | 9 | |
99c55f7d | 10 | #include <linux/workqueue.h> |
db20fd2b | 11 | #include <linux/file.h> |
b121d1e7 | 12 | #include <linux/percpu.h> |
002245cc | 13 | #include <linux/err.h> |
74451e66 | 14 | #include <linux/rbtree_latch.h> |
d6e1e46f | 15 | #include <linux/numa.h> |
fc970227 | 16 | #include <linux/mm_types.h> |
ab3f0063 | 17 | #include <linux/wait.h> |
fec56f58 AS |
18 | #include <linux/refcount.h> |
19 | #include <linux/mutex.h> | |
85d33df3 | 20 | #include <linux/module.h> |
bfea9a85 | 21 | #include <linux/kallsyms.h> |
2c78ee89 | 22 | #include <linux/capability.h> |
48edc1f7 RG |
23 | #include <linux/sched/mm.h> |
24 | #include <linux/slab.h> | |
e21aa341 | 25 | #include <linux/percpu-refcount.h> |
d687f621 | 26 | #include <linux/stddef.h> |
af2ac3e1 | 27 | #include <linux/bpfptr.h> |
14a324f6 | 28 | #include <linux/btf.h> |
8c7dcb84 | 29 | #include <linux/rcupdate_trace.h> |
99c55f7d | 30 | |
cae1927c | 31 | struct bpf_verifier_env; |
9e15db66 | 32 | struct bpf_verifier_log; |
3b1efb19 | 33 | struct perf_event; |
174a79ff | 34 | struct bpf_prog; |
da765a2f | 35 | struct bpf_prog_aux; |
99c55f7d | 36 | struct bpf_map; |
4f738adb | 37 | struct sock; |
a26ca7c9 | 38 | struct seq_file; |
1b2b234b | 39 | struct btf; |
e8d2bec0 | 40 | struct btf_type; |
3dec541b | 41 | struct exception_table_entry; |
ae24345d | 42 | struct seq_operations; |
f9c79272 | 43 | struct bpf_iter_aux_info; |
f836a56e KS |
44 | struct bpf_local_storage; |
45 | struct bpf_local_storage_map; | |
36e68442 | 46 | struct kobject; |
48edc1f7 | 47 | struct mem_cgroup; |
861de02e | 48 | struct module; |
69c087ba | 49 | struct bpf_func_state; |
00963a2e | 50 | struct ftrace_ops; |
d4ccaf58 | 51 | struct cgroup; |
99c55f7d | 52 | |
1b9ed84e QM |
53 | extern struct idr btf_idr; |
54 | extern spinlock_t btf_idr_lock; | |
36e68442 | 55 | extern struct kobject *btf_kobj; |
1b9ed84e | 56 | |
102acbac | 57 | typedef u64 (*bpf_callback_t)(u64, u64, u64, u64, u64); |
f9c79272 YS |
58 | typedef int (*bpf_iter_init_seq_priv_t)(void *private_data, |
59 | struct bpf_iter_aux_info *aux); | |
14fc6bd6 | 60 | typedef void (*bpf_iter_fini_seq_priv_t)(void *private_data); |
af3f4134 SF |
61 | typedef unsigned int (*bpf_func_t)(const void *, |
62 | const struct bpf_insn *); | |
14fc6bd6 YS |
63 | struct bpf_iter_seq_info { |
64 | const struct seq_operations *seq_ops; | |
65 | bpf_iter_init_seq_priv_t init_seq_private; | |
66 | bpf_iter_fini_seq_priv_t fini_seq_private; | |
67 | u32 seq_priv_size; | |
68 | }; | |
69 | ||
5d903493 | 70 | /* map is generic key/value storage optionally accessible by eBPF programs */ |
99c55f7d AS |
71 | struct bpf_map_ops { |
72 | /* funcs callable from userspace (via syscall) */ | |
1110f3a9 | 73 | int (*map_alloc_check)(union bpf_attr *attr); |
99c55f7d | 74 | struct bpf_map *(*map_alloc)(union bpf_attr *attr); |
61d1b6a4 DB |
75 | void (*map_release)(struct bpf_map *map, struct file *map_file); |
76 | void (*map_free)(struct bpf_map *map); | |
db20fd2b | 77 | int (*map_get_next_key)(struct bpf_map *map, void *key, void *next_key); |
ba6b8de4 | 78 | void (*map_release_uref)(struct bpf_map *map); |
c6110222 | 79 | void *(*map_lookup_elem_sys_only)(struct bpf_map *map, void *key); |
cb4d03ab BV |
80 | int (*map_lookup_batch)(struct bpf_map *map, const union bpf_attr *attr, |
81 | union bpf_attr __user *uattr); | |
3e87f192 DS |
82 | int (*map_lookup_and_delete_elem)(struct bpf_map *map, void *key, |
83 | void *value, u64 flags); | |
05799638 YS |
84 | int (*map_lookup_and_delete_batch)(struct bpf_map *map, |
85 | const union bpf_attr *attr, | |
86 | union bpf_attr __user *uattr); | |
aa2e93b8 BV |
87 | int (*map_update_batch)(struct bpf_map *map, const union bpf_attr *attr, |
88 | union bpf_attr __user *uattr); | |
89 | int (*map_delete_batch)(struct bpf_map *map, const union bpf_attr *attr, | |
90 | union bpf_attr __user *uattr); | |
db20fd2b AS |
91 | |
92 | /* funcs callable from userspace and from eBPF programs */ | |
93 | void *(*map_lookup_elem)(struct bpf_map *map, void *key); | |
3274f520 | 94 | int (*map_update_elem)(struct bpf_map *map, void *key, void *value, u64 flags); |
db20fd2b | 95 | int (*map_delete_elem)(struct bpf_map *map, void *key); |
f1a2e44a MV |
96 | int (*map_push_elem)(struct bpf_map *map, void *value, u64 flags); |
97 | int (*map_pop_elem)(struct bpf_map *map, void *value); | |
98 | int (*map_peek_elem)(struct bpf_map *map, void *value); | |
07343110 | 99 | void *(*map_lookup_percpu_elem)(struct bpf_map *map, void *key, u32 cpu); |
2a36f0b9 WN |
100 | |
101 | /* funcs called by prog_array and perf_event_array map */ | |
d056a788 DB |
102 | void *(*map_fd_get_ptr)(struct bpf_map *map, struct file *map_file, |
103 | int fd); | |
104 | void (*map_fd_put_ptr)(void *ptr); | |
4a8f87e6 | 105 | int (*map_gen_lookup)(struct bpf_map *map, struct bpf_insn *insn_buf); |
14dc6f04 | 106 | u32 (*map_fd_sys_lookup_elem)(void *ptr); |
a26ca7c9 MKL |
107 | void (*map_seq_show_elem)(struct bpf_map *map, void *key, |
108 | struct seq_file *m); | |
e8d2bec0 | 109 | int (*map_check_btf)(const struct bpf_map *map, |
1b2b234b | 110 | const struct btf *btf, |
e8d2bec0 DB |
111 | const struct btf_type *key_type, |
112 | const struct btf_type *value_type); | |
d8eca5bb | 113 | |
da765a2f DB |
114 | /* Prog poke tracking helpers. */ |
115 | int (*map_poke_track)(struct bpf_map *map, struct bpf_prog_aux *aux); | |
116 | void (*map_poke_untrack)(struct bpf_map *map, struct bpf_prog_aux *aux); | |
117 | void (*map_poke_run)(struct bpf_map *map, u32 key, struct bpf_prog *old, | |
118 | struct bpf_prog *new); | |
119 | ||
d8eca5bb DB |
120 | /* Direct value access helpers. */ |
121 | int (*map_direct_value_addr)(const struct bpf_map *map, | |
122 | u64 *imm, u32 off); | |
123 | int (*map_direct_value_meta)(const struct bpf_map *map, | |
124 | u64 imm, u32 *off); | |
fc970227 | 125 | int (*map_mmap)(struct bpf_map *map, struct vm_area_struct *vma); |
457f4436 AN |
126 | __poll_t (*map_poll)(struct bpf_map *map, struct file *filp, |
127 | struct poll_table_struct *pts); | |
41c48f3a | 128 | |
f836a56e KS |
129 | /* Functions called by bpf_local_storage maps */ |
130 | int (*map_local_storage_charge)(struct bpf_local_storage_map *smap, | |
131 | void *owner, u32 size); | |
132 | void (*map_local_storage_uncharge)(struct bpf_local_storage_map *smap, | |
133 | void *owner, u32 size); | |
134 | struct bpf_local_storage __rcu ** (*map_owner_storage_ptr)(void *owner); | |
f4d05259 | 135 | |
e6a4750f BT |
136 | /* Misc helpers.*/ |
137 | int (*map_redirect)(struct bpf_map *map, u32 ifindex, u64 flags); | |
138 | ||
f4d05259 MKL |
139 | /* map_meta_equal must be implemented for maps that can be |
140 | * used as an inner map. It is a runtime check to ensure | |
141 | * an inner map can be inserted to an outer map. | |
142 | * | |
143 | * Some properties of the inner map has been used during the | |
144 | * verification time. When inserting an inner map at the runtime, | |
145 | * map_meta_equal has to ensure the inserting map has the same | |
146 | * properties that the verifier has used earlier. | |
147 | */ | |
148 | bool (*map_meta_equal)(const struct bpf_map *meta0, | |
149 | const struct bpf_map *meta1); | |
150 | ||
69c087ba YS |
151 | |
152 | int (*map_set_for_each_callback_args)(struct bpf_verifier_env *env, | |
153 | struct bpf_func_state *caller, | |
154 | struct bpf_func_state *callee); | |
102acbac KC |
155 | int (*map_for_each_callback)(struct bpf_map *map, |
156 | bpf_callback_t callback_fn, | |
69c087ba YS |
157 | void *callback_ctx, u64 flags); |
158 | ||
c317ab71 | 159 | /* BTF id of struct allocated by map_alloc */ |
41c48f3a | 160 | int *map_btf_id; |
a5cbe05a YS |
161 | |
162 | /* bpf_iter info used to open a seq_file */ | |
163 | const struct bpf_iter_seq_info *iter_seq_info; | |
99c55f7d AS |
164 | }; |
165 | ||
61df10c7 KKD |
166 | enum { |
167 | /* Support at most 8 pointers in a BPF map value */ | |
168 | BPF_MAP_VALUE_OFF_MAX = 8, | |
4d7d7f69 KKD |
169 | BPF_MAP_OFF_ARR_MAX = BPF_MAP_VALUE_OFF_MAX + |
170 | 1 + /* for bpf_spin_lock */ | |
171 | 1, /* for bpf_timer */ | |
61df10c7 KKD |
172 | }; |
173 | ||
c0a5a21c KKD |
174 | enum bpf_kptr_type { |
175 | BPF_KPTR_UNREF, | |
176 | BPF_KPTR_REF, | |
177 | }; | |
178 | ||
61df10c7 KKD |
179 | struct bpf_map_value_off_desc { |
180 | u32 offset; | |
c0a5a21c | 181 | enum bpf_kptr_type type; |
61df10c7 KKD |
182 | struct { |
183 | struct btf *btf; | |
14a324f6 KKD |
184 | struct module *module; |
185 | btf_dtor_kfunc_t dtor; | |
61df10c7 KKD |
186 | u32 btf_id; |
187 | } kptr; | |
188 | }; | |
189 | ||
190 | struct bpf_map_value_off { | |
191 | u32 nr_off; | |
192 | struct bpf_map_value_off_desc off[]; | |
193 | }; | |
194 | ||
4d7d7f69 KKD |
195 | struct bpf_map_off_arr { |
196 | u32 cnt; | |
197 | u32 field_off[BPF_MAP_OFF_ARR_MAX]; | |
198 | u8 field_sz[BPF_MAP_OFF_ARR_MAX]; | |
199 | }; | |
200 | ||
99c55f7d | 201 | struct bpf_map { |
a26ca7c9 | 202 | /* The first two cachelines with read-mostly members of which some |
be95a845 DB |
203 | * are also accessed in fast-path (e.g. ops, max_entries). |
204 | */ | |
205 | const struct bpf_map_ops *ops ____cacheline_aligned; | |
206 | struct bpf_map *inner_map_meta; | |
207 | #ifdef CONFIG_SECURITY | |
208 | void *security; | |
209 | #endif | |
99c55f7d AS |
210 | enum bpf_map_type map_type; |
211 | u32 key_size; | |
212 | u32 value_size; | |
213 | u32 max_entries; | |
9330986c | 214 | u64 map_extra; /* any per-map-type extra fields */ |
6c905981 | 215 | u32 map_flags; |
d83525ca | 216 | int spin_lock_off; /* >=0 valid offset, <0 error */ |
61df10c7 | 217 | struct bpf_map_value_off *kptr_off_tab; |
b00628b1 | 218 | int timer_off; /* >=0 valid offset, <0 error */ |
f3f1c054 | 219 | u32 id; |
96eabe7a | 220 | int numa_node; |
9b2cf328 MKL |
221 | u32 btf_key_type_id; |
222 | u32 btf_value_type_id; | |
8845b468 | 223 | u32 btf_vmlinux_value_type_id; |
a26ca7c9 | 224 | struct btf *btf; |
48edc1f7 | 225 | #ifdef CONFIG_MEMCG_KMEM |
4201d9ab | 226 | struct obj_cgroup *objcg; |
48edc1f7 | 227 | #endif |
fc970227 | 228 | char name[BPF_OBJ_NAME_LEN]; |
4d7d7f69 | 229 | struct bpf_map_off_arr *off_arr; |
a26ca7c9 | 230 | /* The 3rd and 4th cacheline with misc members to avoid false sharing |
be95a845 DB |
231 | * particularly with refcounting. |
232 | */ | |
1e0bd5a0 AN |
233 | atomic64_t refcnt ____cacheline_aligned; |
234 | atomic64_t usercnt; | |
be95a845 | 235 | struct work_struct work; |
fc970227 | 236 | struct mutex freeze_mutex; |
353050be | 237 | atomic64_t writecnt; |
f45d5b6c THJ |
238 | /* 'Ownership' of program-containing map is claimed by the first program |
239 | * that is going to use this map or by the first program which FD is | |
240 | * stored in the map to make sure that all callers and callees have the | |
241 | * same prog type, JITed flag and xdp_has_frags flag. | |
242 | */ | |
243 | struct { | |
244 | spinlock_t lock; | |
245 | enum bpf_prog_type type; | |
246 | bool jited; | |
247 | bool xdp_has_frags; | |
248 | } owner; | |
4d7d7f69 KKD |
249 | bool bypass_spec_v1; |
250 | bool frozen; /* write-once; write-protected by freeze_mutex */ | |
99c55f7d AS |
251 | }; |
252 | ||
d83525ca AS |
253 | static inline bool map_value_has_spin_lock(const struct bpf_map *map) |
254 | { | |
255 | return map->spin_lock_off >= 0; | |
256 | } | |
257 | ||
68134668 | 258 | static inline bool map_value_has_timer(const struct bpf_map *map) |
d83525ca | 259 | { |
68134668 | 260 | return map->timer_off >= 0; |
d83525ca AS |
261 | } |
262 | ||
61df10c7 KKD |
263 | static inline bool map_value_has_kptrs(const struct bpf_map *map) |
264 | { | |
265 | return !IS_ERR_OR_NULL(map->kptr_off_tab); | |
266 | } | |
267 | ||
68134668 AS |
268 | static inline void check_and_init_map_value(struct bpf_map *map, void *dst) |
269 | { | |
270 | if (unlikely(map_value_has_spin_lock(map))) | |
5eaed6ee | 271 | memset(dst + map->spin_lock_off, 0, sizeof(struct bpf_spin_lock)); |
68134668 | 272 | if (unlikely(map_value_has_timer(map))) |
5eaed6ee | 273 | memset(dst + map->timer_off, 0, sizeof(struct bpf_timer)); |
4d7d7f69 KKD |
274 | if (unlikely(map_value_has_kptrs(map))) { |
275 | struct bpf_map_value_off *tab = map->kptr_off_tab; | |
276 | int i; | |
277 | ||
278 | for (i = 0; i < tab->nr_off; i++) | |
279 | *(u64 *)(dst + tab->off[i].offset) = 0; | |
280 | } | |
68134668 AS |
281 | } |
282 | ||
283 | /* copy everything but bpf_spin_lock and bpf_timer. There could be one of each. */ | |
d83525ca AS |
284 | static inline void copy_map_value(struct bpf_map *map, void *dst, void *src) |
285 | { | |
4d7d7f69 KKD |
286 | u32 curr_off = 0; |
287 | int i; | |
68134668 | 288 | |
4d7d7f69 KKD |
289 | if (likely(!map->off_arr)) { |
290 | memcpy(dst, src, map->value_size); | |
291 | return; | |
68134668 | 292 | } |
d83525ca | 293 | |
4d7d7f69 KKD |
294 | for (i = 0; i < map->off_arr->cnt; i++) { |
295 | u32 next_off = map->off_arr->field_off[i]; | |
296 | ||
297 | memcpy(dst + curr_off, src + curr_off, next_off - curr_off); | |
298 | curr_off += map->off_arr->field_sz[i]; | |
d83525ca | 299 | } |
4d7d7f69 | 300 | memcpy(dst + curr_off, src + curr_off, map->value_size - curr_off); |
d83525ca | 301 | } |
96049f3a AS |
302 | void copy_map_value_locked(struct bpf_map *map, void *dst, void *src, |
303 | bool lock_src); | |
b00628b1 | 304 | void bpf_timer_cancel_and_free(void *timer); |
8e7ae251 | 305 | int bpf_obj_name_cpy(char *dst, const char *src, unsigned int size); |
d83525ca | 306 | |
602144c2 | 307 | struct bpf_offload_dev; |
a3884572 JK |
308 | struct bpf_offloaded_map; |
309 | ||
310 | struct bpf_map_dev_ops { | |
311 | int (*map_get_next_key)(struct bpf_offloaded_map *map, | |
312 | void *key, void *next_key); | |
313 | int (*map_lookup_elem)(struct bpf_offloaded_map *map, | |
314 | void *key, void *value); | |
315 | int (*map_update_elem)(struct bpf_offloaded_map *map, | |
316 | void *key, void *value, u64 flags); | |
317 | int (*map_delete_elem)(struct bpf_offloaded_map *map, void *key); | |
318 | }; | |
319 | ||
320 | struct bpf_offloaded_map { | |
321 | struct bpf_map map; | |
322 | struct net_device *netdev; | |
323 | const struct bpf_map_dev_ops *dev_ops; | |
324 | void *dev_priv; | |
325 | struct list_head offloads; | |
326 | }; | |
327 | ||
328 | static inline struct bpf_offloaded_map *map_to_offmap(struct bpf_map *map) | |
329 | { | |
330 | return container_of(map, struct bpf_offloaded_map, map); | |
331 | } | |
332 | ||
0cd3cbed JK |
333 | static inline bool bpf_map_offload_neutral(const struct bpf_map *map) |
334 | { | |
335 | return map->map_type == BPF_MAP_TYPE_PERF_EVENT_ARRAY; | |
336 | } | |
337 | ||
a26ca7c9 MKL |
338 | static inline bool bpf_map_support_seq_show(const struct bpf_map *map) |
339 | { | |
85d33df3 MKL |
340 | return (map->btf_value_type_id || map->btf_vmlinux_value_type_id) && |
341 | map->ops->map_seq_show_elem; | |
a26ca7c9 MKL |
342 | } |
343 | ||
e8d2bec0 | 344 | int map_check_no_btf(const struct bpf_map *map, |
1b2b234b | 345 | const struct btf *btf, |
e8d2bec0 DB |
346 | const struct btf_type *key_type, |
347 | const struct btf_type *value_type); | |
348 | ||
f4d05259 MKL |
349 | bool bpf_map_meta_equal(const struct bpf_map *meta0, |
350 | const struct bpf_map *meta1); | |
351 | ||
a3884572 JK |
352 | extern const struct bpf_map_ops bpf_map_offload_ops; |
353 | ||
d639b9d1 HL |
354 | /* bpf_type_flag contains a set of flags that are applicable to the values of |
355 | * arg_type, ret_type and reg_type. For example, a pointer value may be null, | |
356 | * or a memory is read-only. We classify types into two categories: base types | |
357 | * and extended types. Extended types are base types combined with a type flag. | |
358 | * | |
359 | * Currently there are no more than 32 base types in arg_type, ret_type and | |
360 | * reg_types. | |
361 | */ | |
362 | #define BPF_BASE_TYPE_BITS 8 | |
363 | ||
364 | enum bpf_type_flag { | |
365 | /* PTR may be NULL. */ | |
366 | PTR_MAYBE_NULL = BIT(0 + BPF_BASE_TYPE_BITS), | |
367 | ||
216e3cd2 HL |
368 | /* MEM is read-only. When applied on bpf_arg, it indicates the arg is |
369 | * compatible with both mutable and immutable memory. | |
370 | */ | |
20b2aff4 HL |
371 | MEM_RDONLY = BIT(1 + BPF_BASE_TYPE_BITS), |
372 | ||
a672b2e3 DB |
373 | /* MEM was "allocated" from a different helper, and cannot be mixed |
374 | * with regular non-MEM_ALLOC'ed MEM types. | |
375 | */ | |
376 | MEM_ALLOC = BIT(2 + BPF_BASE_TYPE_BITS), | |
377 | ||
c6f1bfe8 YS |
378 | /* MEM is in user address space. */ |
379 | MEM_USER = BIT(3 + BPF_BASE_TYPE_BITS), | |
380 | ||
5844101a HL |
381 | /* MEM is a percpu memory. MEM_PERCPU tags PTR_TO_BTF_ID. When tagged |
382 | * with MEM_PERCPU, PTR_TO_BTF_ID _cannot_ be directly accessed. In | |
383 | * order to drop this tag, it must be passed into bpf_per_cpu_ptr() | |
384 | * or bpf_this_cpu_ptr(), which will return the pointer corresponding | |
385 | * to the specified cpu. | |
386 | */ | |
387 | MEM_PERCPU = BIT(4 + BPF_BASE_TYPE_BITS), | |
388 | ||
8f14852e KKD |
389 | /* Indicates that the argument will be released. */ |
390 | OBJ_RELEASE = BIT(5 + BPF_BASE_TYPE_BITS), | |
391 | ||
6efe152d KKD |
392 | /* PTR is not trusted. This is only used with PTR_TO_BTF_ID, to mark |
393 | * unreferenced and referenced kptr loaded from map value using a load | |
394 | * instruction, so that they can only be dereferenced but not escape the | |
395 | * BPF program into the kernel (i.e. cannot be passed as arguments to | |
396 | * kfunc or bpf helpers). | |
397 | */ | |
398 | PTR_UNTRUSTED = BIT(6 + BPF_BASE_TYPE_BITS), | |
399 | ||
16d1e00c JK |
400 | MEM_UNINIT = BIT(7 + BPF_BASE_TYPE_BITS), |
401 | ||
97e03f52 JK |
402 | /* DYNPTR points to memory local to the bpf program. */ |
403 | DYNPTR_TYPE_LOCAL = BIT(8 + BPF_BASE_TYPE_BITS), | |
404 | ||
bc34dee6 JK |
405 | /* DYNPTR points to a ringbuf record. */ |
406 | DYNPTR_TYPE_RINGBUF = BIT(9 + BPF_BASE_TYPE_BITS), | |
407 | ||
508362ac MM |
408 | /* Size is known at compile time. */ |
409 | MEM_FIXED_SIZE = BIT(10 + BPF_BASE_TYPE_BITS), | |
410 | ||
16d1e00c JK |
411 | __BPF_TYPE_FLAG_MAX, |
412 | __BPF_TYPE_LAST_FLAG = __BPF_TYPE_FLAG_MAX - 1, | |
d639b9d1 HL |
413 | }; |
414 | ||
bc34dee6 | 415 | #define DYNPTR_TYPE_FLAG_MASK (DYNPTR_TYPE_LOCAL | DYNPTR_TYPE_RINGBUF) |
97e03f52 | 416 | |
d639b9d1 HL |
417 | /* Max number of base types. */ |
418 | #define BPF_BASE_TYPE_LIMIT (1UL << BPF_BASE_TYPE_BITS) | |
419 | ||
420 | /* Max number of all types. */ | |
421 | #define BPF_TYPE_LIMIT (__BPF_TYPE_LAST_FLAG | (__BPF_TYPE_LAST_FLAG - 1)) | |
422 | ||
17a52670 AS |
423 | /* function argument constraints */ |
424 | enum bpf_arg_type { | |
80f1d68c | 425 | ARG_DONTCARE = 0, /* unused argument in helper function */ |
17a52670 AS |
426 | |
427 | /* the following constraints used to prototype | |
428 | * bpf_map_lookup/update/delete_elem() functions | |
429 | */ | |
430 | ARG_CONST_MAP_PTR, /* const argument used as pointer to bpf_map */ | |
431 | ARG_PTR_TO_MAP_KEY, /* pointer to stack used as map key */ | |
432 | ARG_PTR_TO_MAP_VALUE, /* pointer to stack used as map value */ | |
433 | ||
16d1e00c JK |
434 | /* Used to prototype bpf_memcmp() and other functions that access data |
435 | * on eBPF program stack | |
17a52670 | 436 | */ |
39f19ebb | 437 | ARG_PTR_TO_MEM, /* pointer to valid memory (stack, packet, map value) */ |
435faee1 | 438 | |
39f19ebb AS |
439 | ARG_CONST_SIZE, /* number of bytes accessed from memory */ |
440 | ARG_CONST_SIZE_OR_ZERO, /* number of bytes accessed from memory or 0 */ | |
80f1d68c | 441 | |
608cd71a | 442 | ARG_PTR_TO_CTX, /* pointer to context */ |
80f1d68c | 443 | ARG_ANYTHING, /* any (initialized) argument is ok */ |
d83525ca | 444 | ARG_PTR_TO_SPIN_LOCK, /* pointer to bpf_spin_lock */ |
46f8bc92 | 445 | ARG_PTR_TO_SOCK_COMMON, /* pointer to sock_common */ |
57c3bb72 AI |
446 | ARG_PTR_TO_INT, /* pointer to int */ |
447 | ARG_PTR_TO_LONG, /* pointer to long */ | |
6ac99e8f | 448 | ARG_PTR_TO_SOCKET, /* pointer to bpf_sock (fullsock) */ |
a7658e1a | 449 | ARG_PTR_TO_BTF_ID, /* pointer to in-kernel struct */ |
457f4436 | 450 | ARG_PTR_TO_ALLOC_MEM, /* pointer to dynamically allocated memory */ |
457f4436 | 451 | ARG_CONST_ALLOC_SIZE_OR_ZERO, /* number of allocated bytes requested */ |
1df8f55a | 452 | ARG_PTR_TO_BTF_ID_SOCK_COMMON, /* pointer to in-kernel sock_common or bpf-mirrored bpf_sock */ |
eaa6bcb7 | 453 | ARG_PTR_TO_PERCPU_BTF_ID, /* pointer to in-kernel percpu type */ |
69c087ba | 454 | ARG_PTR_TO_FUNC, /* pointer to a bpf program function */ |
48946bd6 | 455 | ARG_PTR_TO_STACK, /* pointer to stack */ |
fff13c4b | 456 | ARG_PTR_TO_CONST_STR, /* pointer to a null terminated read-only string */ |
b00628b1 | 457 | ARG_PTR_TO_TIMER, /* pointer to bpf_timer */ |
c0a5a21c | 458 | ARG_PTR_TO_KPTR, /* pointer to referenced kptr */ |
97e03f52 | 459 | ARG_PTR_TO_DYNPTR, /* pointer to bpf_dynptr. See bpf_type_flag for dynptr type */ |
f79e7ea5 | 460 | __BPF_ARG_TYPE_MAX, |
d639b9d1 | 461 | |
48946bd6 HL |
462 | /* Extended arg_types. */ |
463 | ARG_PTR_TO_MAP_VALUE_OR_NULL = PTR_MAYBE_NULL | ARG_PTR_TO_MAP_VALUE, | |
464 | ARG_PTR_TO_MEM_OR_NULL = PTR_MAYBE_NULL | ARG_PTR_TO_MEM, | |
465 | ARG_PTR_TO_CTX_OR_NULL = PTR_MAYBE_NULL | ARG_PTR_TO_CTX, | |
466 | ARG_PTR_TO_SOCKET_OR_NULL = PTR_MAYBE_NULL | ARG_PTR_TO_SOCKET, | |
467 | ARG_PTR_TO_ALLOC_MEM_OR_NULL = PTR_MAYBE_NULL | ARG_PTR_TO_ALLOC_MEM, | |
468 | ARG_PTR_TO_STACK_OR_NULL = PTR_MAYBE_NULL | ARG_PTR_TO_STACK, | |
c0a5a21c | 469 | ARG_PTR_TO_BTF_ID_OR_NULL = PTR_MAYBE_NULL | ARG_PTR_TO_BTF_ID, |
16d1e00c JK |
470 | /* pointer to memory does not need to be initialized, helper function must fill |
471 | * all bytes or clear them in error case. | |
472 | */ | |
473 | ARG_PTR_TO_UNINIT_MEM = MEM_UNINIT | ARG_PTR_TO_MEM, | |
508362ac MM |
474 | /* Pointer to valid memory of size known at compile time. */ |
475 | ARG_PTR_TO_FIXED_SIZE_MEM = MEM_FIXED_SIZE | ARG_PTR_TO_MEM, | |
48946bd6 | 476 | |
d639b9d1 HL |
477 | /* This must be the last entry. Its purpose is to ensure the enum is |
478 | * wide enough to hold the higher bits reserved for bpf_type_flag. | |
479 | */ | |
480 | __BPF_ARG_TYPE_LIMIT = BPF_TYPE_LIMIT, | |
17a52670 | 481 | }; |
d639b9d1 | 482 | static_assert(__BPF_ARG_TYPE_MAX <= BPF_BASE_TYPE_LIMIT); |
17a52670 AS |
483 | |
484 | /* type of values returned from helper functions */ | |
485 | enum bpf_return_type { | |
486 | RET_INTEGER, /* function returns integer */ | |
487 | RET_VOID, /* function doesn't return anything */ | |
3e6a4b3e | 488 | RET_PTR_TO_MAP_VALUE, /* returns a pointer to map elem value */ |
3c480732 HL |
489 | RET_PTR_TO_SOCKET, /* returns a pointer to a socket */ |
490 | RET_PTR_TO_TCP_SOCK, /* returns a pointer to a tcp_sock */ | |
491 | RET_PTR_TO_SOCK_COMMON, /* returns a pointer to a sock_common */ | |
492 | RET_PTR_TO_ALLOC_MEM, /* returns a pointer to dynamically allocated memory */ | |
63d9b80d | 493 | RET_PTR_TO_MEM_OR_BTF_ID, /* returns a pointer to a valid memory or a btf_id */ |
3ca1032a | 494 | RET_PTR_TO_BTF_ID, /* returns a pointer to a btf_id */ |
d639b9d1 HL |
495 | __BPF_RET_TYPE_MAX, |
496 | ||
3c480732 HL |
497 | /* Extended ret_types. */ |
498 | RET_PTR_TO_MAP_VALUE_OR_NULL = PTR_MAYBE_NULL | RET_PTR_TO_MAP_VALUE, | |
499 | RET_PTR_TO_SOCKET_OR_NULL = PTR_MAYBE_NULL | RET_PTR_TO_SOCKET, | |
500 | RET_PTR_TO_TCP_SOCK_OR_NULL = PTR_MAYBE_NULL | RET_PTR_TO_TCP_SOCK, | |
501 | RET_PTR_TO_SOCK_COMMON_OR_NULL = PTR_MAYBE_NULL | RET_PTR_TO_SOCK_COMMON, | |
a672b2e3 | 502 | RET_PTR_TO_ALLOC_MEM_OR_NULL = PTR_MAYBE_NULL | MEM_ALLOC | RET_PTR_TO_ALLOC_MEM, |
34d4ef57 | 503 | RET_PTR_TO_DYNPTR_MEM_OR_NULL = PTR_MAYBE_NULL | RET_PTR_TO_ALLOC_MEM, |
3c480732 HL |
504 | RET_PTR_TO_BTF_ID_OR_NULL = PTR_MAYBE_NULL | RET_PTR_TO_BTF_ID, |
505 | ||
d639b9d1 HL |
506 | /* This must be the last entry. Its purpose is to ensure the enum is |
507 | * wide enough to hold the higher bits reserved for bpf_type_flag. | |
508 | */ | |
509 | __BPF_RET_TYPE_LIMIT = BPF_TYPE_LIMIT, | |
17a52670 | 510 | }; |
d639b9d1 | 511 | static_assert(__BPF_RET_TYPE_MAX <= BPF_BASE_TYPE_LIMIT); |
17a52670 | 512 | |
09756af4 AS |
513 | /* eBPF function prototype used by verifier to allow BPF_CALLs from eBPF programs |
514 | * to in-kernel helper functions and for adjusting imm32 field in BPF_CALL | |
515 | * instructions after verifying | |
516 | */ | |
517 | struct bpf_func_proto { | |
518 | u64 (*func)(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5); | |
519 | bool gpl_only; | |
36bbef52 | 520 | bool pkt_access; |
17a52670 | 521 | enum bpf_return_type ret_type; |
a7658e1a AS |
522 | union { |
523 | struct { | |
524 | enum bpf_arg_type arg1_type; | |
525 | enum bpf_arg_type arg2_type; | |
526 | enum bpf_arg_type arg3_type; | |
527 | enum bpf_arg_type arg4_type; | |
528 | enum bpf_arg_type arg5_type; | |
529 | }; | |
530 | enum bpf_arg_type arg_type[5]; | |
531 | }; | |
9436ef6e LB |
532 | union { |
533 | struct { | |
534 | u32 *arg1_btf_id; | |
535 | u32 *arg2_btf_id; | |
536 | u32 *arg3_btf_id; | |
537 | u32 *arg4_btf_id; | |
538 | u32 *arg5_btf_id; | |
539 | }; | |
540 | u32 *arg_btf_id[5]; | |
508362ac MM |
541 | struct { |
542 | size_t arg1_size; | |
543 | size_t arg2_size; | |
544 | size_t arg3_size; | |
545 | size_t arg4_size; | |
546 | size_t arg5_size; | |
547 | }; | |
548 | size_t arg_size[5]; | |
9436ef6e | 549 | }; |
af7ec138 | 550 | int *ret_btf_id; /* return value btf_id */ |
eae2e83e | 551 | bool (*allowed)(const struct bpf_prog *prog); |
17a52670 AS |
552 | }; |
553 | ||
554 | /* bpf_context is intentionally undefined structure. Pointer to bpf_context is | |
555 | * the first argument to eBPF programs. | |
556 | * For socket filters: 'struct bpf_context *' == 'struct sk_buff *' | |
557 | */ | |
558 | struct bpf_context; | |
559 | ||
560 | enum bpf_access_type { | |
561 | BPF_READ = 1, | |
562 | BPF_WRITE = 2 | |
09756af4 AS |
563 | }; |
564 | ||
19de99f7 | 565 | /* types of values stored in eBPF registers */ |
f1174f77 EC |
566 | /* Pointer types represent: |
567 | * pointer | |
568 | * pointer + imm | |
569 | * pointer + (u16) var | |
570 | * pointer + (u16) var + imm | |
571 | * if (range > 0) then [ptr, ptr + range - off) is safe to access | |
572 | * if (id > 0) means that some 'var' was added | |
573 | * if (off > 0) means that 'imm' was added | |
574 | */ | |
19de99f7 AS |
575 | enum bpf_reg_type { |
576 | NOT_INIT = 0, /* nothing was written into register */ | |
f1174f77 | 577 | SCALAR_VALUE, /* reg doesn't contain a valid pointer */ |
19de99f7 AS |
578 | PTR_TO_CTX, /* reg points to bpf_context */ |
579 | CONST_PTR_TO_MAP, /* reg points to struct bpf_map */ | |
580 | PTR_TO_MAP_VALUE, /* reg points to map element value */ | |
c25b2ae1 | 581 | PTR_TO_MAP_KEY, /* reg points to a map element key */ |
f1174f77 | 582 | PTR_TO_STACK, /* reg == frame_pointer + offset */ |
de8f3a83 | 583 | PTR_TO_PACKET_META, /* skb->data - meta_len */ |
f1174f77 | 584 | PTR_TO_PACKET, /* reg points to skb->data */ |
19de99f7 | 585 | PTR_TO_PACKET_END, /* skb->data + headlen */ |
d58e468b | 586 | PTR_TO_FLOW_KEYS, /* reg points to bpf_flow_keys */ |
c64b7983 | 587 | PTR_TO_SOCKET, /* reg points to struct bpf_sock */ |
46f8bc92 | 588 | PTR_TO_SOCK_COMMON, /* reg points to sock_common */ |
655a51e5 | 589 | PTR_TO_TCP_SOCK, /* reg points to struct tcp_sock */ |
9df1c28b | 590 | PTR_TO_TP_BUFFER, /* reg points to a writable raw tp's buffer */ |
fada7fdc | 591 | PTR_TO_XDP_SOCK, /* reg points to struct xdp_sock */ |
ba5f4cfe JF |
592 | /* PTR_TO_BTF_ID points to a kernel struct that does not need |
593 | * to be null checked by the BPF program. This does not imply the | |
594 | * pointer is _not_ null and in practice this can easily be a null | |
595 | * pointer when reading pointer chains. The assumption is program | |
596 | * context will handle null pointer dereference typically via fault | |
597 | * handling. The verifier must keep this in mind and can make no | |
598 | * assumptions about null or non-null when doing branch analysis. | |
599 | * Further, when passed into helpers the helpers can not, without | |
600 | * additional context, assume the value is non-null. | |
601 | */ | |
602 | PTR_TO_BTF_ID, | |
603 | /* PTR_TO_BTF_ID_OR_NULL points to a kernel struct that has not | |
604 | * been checked for null. Used primarily to inform the verifier | |
605 | * an explicit null check is required for this struct. | |
606 | */ | |
457f4436 | 607 | PTR_TO_MEM, /* reg points to valid memory region */ |
20b2aff4 | 608 | PTR_TO_BUF, /* reg points to a read/write buffer */ |
69c087ba | 609 | PTR_TO_FUNC, /* reg points to a bpf program function */ |
e6ac2450 | 610 | __BPF_REG_TYPE_MAX, |
d639b9d1 | 611 | |
c25b2ae1 HL |
612 | /* Extended reg_types. */ |
613 | PTR_TO_MAP_VALUE_OR_NULL = PTR_MAYBE_NULL | PTR_TO_MAP_VALUE, | |
614 | PTR_TO_SOCKET_OR_NULL = PTR_MAYBE_NULL | PTR_TO_SOCKET, | |
615 | PTR_TO_SOCK_COMMON_OR_NULL = PTR_MAYBE_NULL | PTR_TO_SOCK_COMMON, | |
616 | PTR_TO_TCP_SOCK_OR_NULL = PTR_MAYBE_NULL | PTR_TO_TCP_SOCK, | |
617 | PTR_TO_BTF_ID_OR_NULL = PTR_MAYBE_NULL | PTR_TO_BTF_ID, | |
c25b2ae1 | 618 | |
d639b9d1 HL |
619 | /* This must be the last entry. Its purpose is to ensure the enum is |
620 | * wide enough to hold the higher bits reserved for bpf_type_flag. | |
621 | */ | |
622 | __BPF_REG_TYPE_LIMIT = BPF_TYPE_LIMIT, | |
19de99f7 | 623 | }; |
d639b9d1 | 624 | static_assert(__BPF_REG_TYPE_MAX <= BPF_BASE_TYPE_LIMIT); |
19de99f7 | 625 | |
23994631 YS |
626 | /* The information passed from prog-specific *_is_valid_access |
627 | * back to the verifier. | |
628 | */ | |
629 | struct bpf_insn_access_aux { | |
630 | enum bpf_reg_type reg_type; | |
9e15db66 AS |
631 | union { |
632 | int ctx_field_size; | |
22dc4a0f AN |
633 | struct { |
634 | struct btf *btf; | |
635 | u32 btf_id; | |
636 | }; | |
9e15db66 AS |
637 | }; |
638 | struct bpf_verifier_log *log; /* for verbose logs */ | |
23994631 YS |
639 | }; |
640 | ||
f96da094 DB |
641 | static inline void |
642 | bpf_ctx_record_field_size(struct bpf_insn_access_aux *aux, u32 size) | |
643 | { | |
644 | aux->ctx_field_size = size; | |
645 | } | |
646 | ||
3990ed4c MKL |
647 | static inline bool bpf_pseudo_func(const struct bpf_insn *insn) |
648 | { | |
649 | return insn->code == (BPF_LD | BPF_IMM | BPF_DW) && | |
650 | insn->src_reg == BPF_PSEUDO_FUNC; | |
651 | } | |
652 | ||
7de16e3a JK |
653 | struct bpf_prog_ops { |
654 | int (*test_run)(struct bpf_prog *prog, const union bpf_attr *kattr, | |
655 | union bpf_attr __user *uattr); | |
656 | }; | |
657 | ||
09756af4 AS |
658 | struct bpf_verifier_ops { |
659 | /* return eBPF function prototype for verification */ | |
5e43f899 AI |
660 | const struct bpf_func_proto * |
661 | (*get_func_proto)(enum bpf_func_id func_id, | |
662 | const struct bpf_prog *prog); | |
17a52670 AS |
663 | |
664 | /* return true if 'size' wide access at offset 'off' within bpf_context | |
665 | * with 'type' (read or write) is allowed | |
666 | */ | |
19de99f7 | 667 | bool (*is_valid_access)(int off, int size, enum bpf_access_type type, |
5e43f899 | 668 | const struct bpf_prog *prog, |
23994631 | 669 | struct bpf_insn_access_aux *info); |
36bbef52 DB |
670 | int (*gen_prologue)(struct bpf_insn *insn, bool direct_write, |
671 | const struct bpf_prog *prog); | |
e0cea7ce DB |
672 | int (*gen_ld_abs)(const struct bpf_insn *orig, |
673 | struct bpf_insn *insn_buf); | |
6b8cc1d1 DB |
674 | u32 (*convert_ctx_access)(enum bpf_access_type type, |
675 | const struct bpf_insn *src, | |
676 | struct bpf_insn *dst, | |
f96da094 | 677 | struct bpf_prog *prog, u32 *target_size); |
27ae7997 | 678 | int (*btf_struct_access)(struct bpf_verifier_log *log, |
22dc4a0f | 679 | const struct btf *btf, |
27ae7997 MKL |
680 | const struct btf_type *t, int off, int size, |
681 | enum bpf_access_type atype, | |
c6f1bfe8 | 682 | u32 *next_btf_id, enum bpf_type_flag *flag); |
09756af4 AS |
683 | }; |
684 | ||
cae1927c | 685 | struct bpf_prog_offload_ops { |
08ca90af | 686 | /* verifier basic callbacks */ |
cae1927c JK |
687 | int (*insn_hook)(struct bpf_verifier_env *env, |
688 | int insn_idx, int prev_insn_idx); | |
c941ce9c | 689 | int (*finalize)(struct bpf_verifier_env *env); |
08ca90af JK |
690 | /* verifier optimization callbacks (called after .finalize) */ |
691 | int (*replace_insn)(struct bpf_verifier_env *env, u32 off, | |
692 | struct bpf_insn *insn); | |
693 | int (*remove_insns)(struct bpf_verifier_env *env, u32 off, u32 cnt); | |
694 | /* program management callbacks */ | |
16a8cb5c QM |
695 | int (*prepare)(struct bpf_prog *prog); |
696 | int (*translate)(struct bpf_prog *prog); | |
eb911947 | 697 | void (*destroy)(struct bpf_prog *prog); |
cae1927c JK |
698 | }; |
699 | ||
0a9c1991 | 700 | struct bpf_prog_offload { |
ab3f0063 JK |
701 | struct bpf_prog *prog; |
702 | struct net_device *netdev; | |
341b3e7b | 703 | struct bpf_offload_dev *offdev; |
ab3f0063 JK |
704 | void *dev_priv; |
705 | struct list_head offloads; | |
706 | bool dev_state; | |
08ca90af | 707 | bool opt_failed; |
fcfb126d JW |
708 | void *jited_image; |
709 | u32 jited_len; | |
ab3f0063 JK |
710 | }; |
711 | ||
8bad74f9 RG |
712 | enum bpf_cgroup_storage_type { |
713 | BPF_CGROUP_STORAGE_SHARED, | |
b741f163 | 714 | BPF_CGROUP_STORAGE_PERCPU, |
8bad74f9 RG |
715 | __BPF_CGROUP_STORAGE_MAX |
716 | }; | |
717 | ||
718 | #define MAX_BPF_CGROUP_STORAGE_TYPE __BPF_CGROUP_STORAGE_MAX | |
719 | ||
f1b9509c AS |
720 | /* The longest tracepoint has 12 args. |
721 | * See include/trace/bpf_probe.h | |
722 | */ | |
723 | #define MAX_BPF_FUNC_ARGS 12 | |
724 | ||
523a4cf4 DB |
725 | /* The maximum number of arguments passed through registers |
726 | * a single function may have. | |
727 | */ | |
728 | #define MAX_BPF_FUNC_REG_ARGS 5 | |
729 | ||
720e6a43 YS |
730 | /* The argument is a structure. */ |
731 | #define BTF_FMODEL_STRUCT_ARG BIT(0) | |
732 | ||
fec56f58 AS |
733 | struct btf_func_model { |
734 | u8 ret_size; | |
735 | u8 nr_args; | |
736 | u8 arg_size[MAX_BPF_FUNC_ARGS]; | |
720e6a43 | 737 | u8 arg_flags[MAX_BPF_FUNC_ARGS]; |
fec56f58 AS |
738 | }; |
739 | ||
740 | /* Restore arguments before returning from trampoline to let original function | |
741 | * continue executing. This flag is used for fentry progs when there are no | |
742 | * fexit progs. | |
743 | */ | |
744 | #define BPF_TRAMP_F_RESTORE_REGS BIT(0) | |
745 | /* Call original function after fentry progs, but before fexit progs. | |
746 | * Makes sense for fentry/fexit, normal calls and indirect calls. | |
747 | */ | |
748 | #define BPF_TRAMP_F_CALL_ORIG BIT(1) | |
749 | /* Skip current frame and return to parent. Makes sense for fentry/fexit | |
750 | * programs only. Should not be used with normal calls and indirect calls. | |
751 | */ | |
752 | #define BPF_TRAMP_F_SKIP_FRAME BIT(2) | |
7e6f3cd8 JO |
753 | /* Store IP address of the caller on the trampoline stack, |
754 | * so it's available for trampoline's programs. | |
755 | */ | |
756 | #define BPF_TRAMP_F_IP_ARG BIT(3) | |
356ed649 HT |
757 | /* Return the return value of fentry prog. Only used by bpf_struct_ops. */ |
758 | #define BPF_TRAMP_F_RET_FENTRY_RET BIT(4) | |
7e6f3cd8 | 759 | |
316cba62 JO |
760 | /* Get original function from stack instead of from provided direct address. |
761 | * Makes sense for trampolines with fexit or fmod_ret programs. | |
762 | */ | |
763 | #define BPF_TRAMP_F_ORIG_STACK BIT(5) | |
764 | ||
00963a2e SL |
765 | /* This trampoline is on a function with another ftrace_ops with IPMODIFY, |
766 | * e.g., a live patch. This flag is set and cleared by ftrace call backs, | |
767 | */ | |
768 | #define BPF_TRAMP_F_SHARE_IPMODIFY BIT(6) | |
769 | ||
88fd9e53 | 770 | /* Each call __bpf_prog_enter + call bpf_func + call __bpf_prog_exit is ~50 |
b23316aa | 771 | * bytes on x86. |
88fd9e53 | 772 | */ |
f7e0beaf | 773 | #define BPF_MAX_TRAMP_LINKS 38 |
88fd9e53 | 774 | |
f7e0beaf KFL |
775 | struct bpf_tramp_links { |
776 | struct bpf_tramp_link *links[BPF_MAX_TRAMP_LINKS]; | |
777 | int nr_links; | |
88fd9e53 KS |
778 | }; |
779 | ||
e384c7b7 KFL |
780 | struct bpf_tramp_run_ctx; |
781 | ||
fec56f58 AS |
782 | /* Different use cases for BPF trampoline: |
783 | * 1. replace nop at the function entry (kprobe equivalent) | |
784 | * flags = BPF_TRAMP_F_RESTORE_REGS | |
785 | * fentry = a set of programs to run before returning from trampoline | |
786 | * | |
787 | * 2. replace nop at the function entry (kprobe + kretprobe equivalent) | |
788 | * flags = BPF_TRAMP_F_CALL_ORIG | BPF_TRAMP_F_SKIP_FRAME | |
789 | * orig_call = fentry_ip + MCOUNT_INSN_SIZE | |
790 | * fentry = a set of program to run before calling original function | |
791 | * fexit = a set of program to run after original function | |
792 | * | |
793 | * 3. replace direct call instruction anywhere in the function body | |
794 | * or assign a function pointer for indirect call (like tcp_congestion_ops->cong_avoid) | |
795 | * With flags = 0 | |
796 | * fentry = a set of programs to run before returning from trampoline | |
797 | * With flags = BPF_TRAMP_F_CALL_ORIG | |
798 | * orig_call = original callback addr or direct function addr | |
799 | * fentry = a set of program to run before calling original function | |
800 | * fexit = a set of program to run after original function | |
801 | */ | |
e21aa341 AS |
802 | struct bpf_tramp_image; |
803 | int arch_prepare_bpf_trampoline(struct bpf_tramp_image *tr, void *image, void *image_end, | |
85d33df3 | 804 | const struct btf_func_model *m, u32 flags, |
f7e0beaf | 805 | struct bpf_tramp_links *tlinks, |
fec56f58 AS |
806 | void *orig_call); |
807 | /* these two functions are called from generated trampoline */ | |
e384c7b7 KFL |
808 | u64 notrace __bpf_prog_enter(struct bpf_prog *prog, struct bpf_tramp_run_ctx *run_ctx); |
809 | void notrace __bpf_prog_exit(struct bpf_prog *prog, u64 start, struct bpf_tramp_run_ctx *run_ctx); | |
810 | u64 notrace __bpf_prog_enter_sleepable(struct bpf_prog *prog, struct bpf_tramp_run_ctx *run_ctx); | |
811 | void notrace __bpf_prog_exit_sleepable(struct bpf_prog *prog, u64 start, | |
812 | struct bpf_tramp_run_ctx *run_ctx); | |
69fd337a SF |
813 | u64 notrace __bpf_prog_enter_lsm_cgroup(struct bpf_prog *prog, |
814 | struct bpf_tramp_run_ctx *run_ctx); | |
815 | void notrace __bpf_prog_exit_lsm_cgroup(struct bpf_prog *prog, u64 start, | |
816 | struct bpf_tramp_run_ctx *run_ctx); | |
e21aa341 AS |
817 | void notrace __bpf_tramp_enter(struct bpf_tramp_image *tr); |
818 | void notrace __bpf_tramp_exit(struct bpf_tramp_image *tr); | |
fec56f58 | 819 | |
535911c8 JO |
820 | struct bpf_ksym { |
821 | unsigned long start; | |
822 | unsigned long end; | |
bfea9a85 | 823 | char name[KSYM_NAME_LEN]; |
ecb60d1c | 824 | struct list_head lnode; |
ca4424c9 | 825 | struct latch_tree_node tnode; |
cbd76f8d | 826 | bool prog; |
535911c8 JO |
827 | }; |
828 | ||
fec56f58 AS |
829 | enum bpf_tramp_prog_type { |
830 | BPF_TRAMP_FENTRY, | |
831 | BPF_TRAMP_FEXIT, | |
ae240823 | 832 | BPF_TRAMP_MODIFY_RETURN, |
be8704ff AS |
833 | BPF_TRAMP_MAX, |
834 | BPF_TRAMP_REPLACE, /* more than MAX */ | |
fec56f58 AS |
835 | }; |
836 | ||
e21aa341 AS |
837 | struct bpf_tramp_image { |
838 | void *image; | |
839 | struct bpf_ksym ksym; | |
840 | struct percpu_ref pcref; | |
841 | void *ip_after_call; | |
842 | void *ip_epilogue; | |
843 | union { | |
844 | struct rcu_head rcu; | |
845 | struct work_struct work; | |
846 | }; | |
847 | }; | |
848 | ||
fec56f58 AS |
849 | struct bpf_trampoline { |
850 | /* hlist for trampoline_table */ | |
851 | struct hlist_node hlist; | |
00963a2e | 852 | struct ftrace_ops *fops; |
fec56f58 AS |
853 | /* serializes access to fields of this trampoline */ |
854 | struct mutex mutex; | |
855 | refcount_t refcnt; | |
00963a2e | 856 | u32 flags; |
fec56f58 AS |
857 | u64 key; |
858 | struct { | |
859 | struct btf_func_model model; | |
860 | void *addr; | |
b91e014f | 861 | bool ftrace_managed; |
fec56f58 | 862 | } func; |
be8704ff AS |
863 | /* if !NULL this is BPF_PROG_TYPE_EXT program that extends another BPF |
864 | * program by replacing one of its functions. func.addr is the address | |
865 | * of the function it replaced. | |
866 | */ | |
867 | struct bpf_prog *extension_prog; | |
fec56f58 AS |
868 | /* list of BPF programs using this trampoline */ |
869 | struct hlist_head progs_hlist[BPF_TRAMP_MAX]; | |
870 | /* Number of attached programs. A counter per kind. */ | |
871 | int progs_cnt[BPF_TRAMP_MAX]; | |
872 | /* Executable image of trampoline */ | |
e21aa341 | 873 | struct bpf_tramp_image *cur_image; |
fec56f58 | 874 | u64 selector; |
861de02e | 875 | struct module *mod; |
fec56f58 | 876 | }; |
75ccbef6 | 877 | |
f7b12b6f THJ |
878 | struct bpf_attach_target_info { |
879 | struct btf_func_model fmodel; | |
880 | long tgt_addr; | |
881 | const char *tgt_name; | |
882 | const struct btf_type *tgt_type; | |
883 | }; | |
884 | ||
116eb788 | 885 | #define BPF_DISPATCHER_MAX 48 /* Fits in 2048B */ |
75ccbef6 BT |
886 | |
887 | struct bpf_dispatcher_prog { | |
888 | struct bpf_prog *prog; | |
889 | refcount_t users; | |
890 | }; | |
891 | ||
892 | struct bpf_dispatcher { | |
893 | /* dispatcher mutex */ | |
894 | struct mutex mutex; | |
895 | void *func; | |
896 | struct bpf_dispatcher_prog progs[BPF_DISPATCHER_MAX]; | |
897 | int num_progs; | |
898 | void *image; | |
899 | u32 image_off; | |
517b75e4 | 900 | struct bpf_ksym ksym; |
75ccbef6 BT |
901 | }; |
902 | ||
9f5b4009 | 903 | static __always_inline __nocfi unsigned int bpf_dispatcher_nop_func( |
7e6897f9 BT |
904 | const void *ctx, |
905 | const struct bpf_insn *insnsi, | |
af3f4134 | 906 | bpf_func_t bpf_func) |
7e6897f9 BT |
907 | { |
908 | return bpf_func(ctx, insnsi); | |
909 | } | |
f7e0beaf | 910 | |
fec56f58 | 911 | #ifdef CONFIG_BPF_JIT |
f7e0beaf KFL |
912 | int bpf_trampoline_link_prog(struct bpf_tramp_link *link, struct bpf_trampoline *tr); |
913 | int bpf_trampoline_unlink_prog(struct bpf_tramp_link *link, struct bpf_trampoline *tr); | |
f7b12b6f THJ |
914 | struct bpf_trampoline *bpf_trampoline_get(u64 key, |
915 | struct bpf_attach_target_info *tgt_info); | |
fec56f58 | 916 | void bpf_trampoline_put(struct bpf_trampoline *tr); |
f45b2974 | 917 | int arch_prepare_bpf_dispatcher(void *image, s64 *funcs, int num_funcs); |
517b75e4 JO |
918 | #define BPF_DISPATCHER_INIT(_name) { \ |
919 | .mutex = __MUTEX_INITIALIZER(_name.mutex), \ | |
920 | .func = &_name##_func, \ | |
921 | .progs = {}, \ | |
922 | .num_progs = 0, \ | |
923 | .image = NULL, \ | |
924 | .image_off = 0, \ | |
925 | .ksym = { \ | |
926 | .name = #_name, \ | |
927 | .lnode = LIST_HEAD_INIT(_name.ksym.lnode), \ | |
928 | }, \ | |
75ccbef6 BT |
929 | } |
930 | ||
931 | #define DEFINE_BPF_DISPATCHER(name) \ | |
9f5b4009 | 932 | noinline __nocfi unsigned int bpf_dispatcher_##name##_func( \ |
75ccbef6 BT |
933 | const void *ctx, \ |
934 | const struct bpf_insn *insnsi, \ | |
af3f4134 | 935 | bpf_func_t bpf_func) \ |
75ccbef6 BT |
936 | { \ |
937 | return bpf_func(ctx, insnsi); \ | |
938 | } \ | |
6a64037d BT |
939 | EXPORT_SYMBOL(bpf_dispatcher_##name##_func); \ |
940 | struct bpf_dispatcher bpf_dispatcher_##name = \ | |
941 | BPF_DISPATCHER_INIT(bpf_dispatcher_##name); | |
75ccbef6 | 942 | #define DECLARE_BPF_DISPATCHER(name) \ |
6a64037d | 943 | unsigned int bpf_dispatcher_##name##_func( \ |
75ccbef6 BT |
944 | const void *ctx, \ |
945 | const struct bpf_insn *insnsi, \ | |
af3f4134 | 946 | bpf_func_t bpf_func); \ |
6a64037d BT |
947 | extern struct bpf_dispatcher bpf_dispatcher_##name; |
948 | #define BPF_DISPATCHER_FUNC(name) bpf_dispatcher_##name##_func | |
949 | #define BPF_DISPATCHER_PTR(name) (&bpf_dispatcher_##name) | |
75ccbef6 BT |
950 | void bpf_dispatcher_change_prog(struct bpf_dispatcher *d, struct bpf_prog *from, |
951 | struct bpf_prog *to); | |
dba122fb | 952 | /* Called only from JIT-enabled code, so there's no need for stubs. */ |
7ac88eba | 953 | void *bpf_jit_alloc_exec_page(void); |
a108f7dc JO |
954 | void bpf_image_ksym_add(void *data, struct bpf_ksym *ksym); |
955 | void bpf_image_ksym_del(struct bpf_ksym *ksym); | |
dba122fb JO |
956 | void bpf_ksym_add(struct bpf_ksym *ksym); |
957 | void bpf_ksym_del(struct bpf_ksym *ksym); | |
3486bedd SL |
958 | int bpf_jit_charge_modmem(u32 size); |
959 | void bpf_jit_uncharge_modmem(u32 size); | |
f92c1e18 | 960 | bool bpf_prog_has_trampoline(const struct bpf_prog *prog); |
fec56f58 | 961 | #else |
f7e0beaf | 962 | static inline int bpf_trampoline_link_prog(struct bpf_tramp_link *link, |
3aac1ead | 963 | struct bpf_trampoline *tr) |
fec56f58 AS |
964 | { |
965 | return -ENOTSUPP; | |
966 | } | |
f7e0beaf | 967 | static inline int bpf_trampoline_unlink_prog(struct bpf_tramp_link *link, |
3aac1ead | 968 | struct bpf_trampoline *tr) |
fec56f58 AS |
969 | { |
970 | return -ENOTSUPP; | |
971 | } | |
f7b12b6f THJ |
972 | static inline struct bpf_trampoline *bpf_trampoline_get(u64 key, |
973 | struct bpf_attach_target_info *tgt_info) | |
974 | { | |
975 | return ERR_PTR(-EOPNOTSUPP); | |
976 | } | |
fec56f58 | 977 | static inline void bpf_trampoline_put(struct bpf_trampoline *tr) {} |
75ccbef6 BT |
978 | #define DEFINE_BPF_DISPATCHER(name) |
979 | #define DECLARE_BPF_DISPATCHER(name) | |
6a64037d | 980 | #define BPF_DISPATCHER_FUNC(name) bpf_dispatcher_nop_func |
75ccbef6 BT |
981 | #define BPF_DISPATCHER_PTR(name) NULL |
982 | static inline void bpf_dispatcher_change_prog(struct bpf_dispatcher *d, | |
983 | struct bpf_prog *from, | |
984 | struct bpf_prog *to) {} | |
e9b4e606 JO |
985 | static inline bool is_bpf_image_address(unsigned long address) |
986 | { | |
987 | return false; | |
988 | } | |
f92c1e18 JO |
989 | static inline bool bpf_prog_has_trampoline(const struct bpf_prog *prog) |
990 | { | |
991 | return false; | |
992 | } | |
fec56f58 AS |
993 | #endif |
994 | ||
8c1b6e69 | 995 | struct bpf_func_info_aux { |
51c39bb1 | 996 | u16 linkage; |
8c1b6e69 AS |
997 | bool unreliable; |
998 | }; | |
999 | ||
a66886fe DB |
1000 | enum bpf_jit_poke_reason { |
1001 | BPF_POKE_REASON_TAIL_CALL, | |
1002 | }; | |
1003 | ||
1004 | /* Descriptor of pokes pointing /into/ the JITed image. */ | |
1005 | struct bpf_jit_poke_descriptor { | |
cf71b174 | 1006 | void *tailcall_target; |
ebf7d1f5 MF |
1007 | void *tailcall_bypass; |
1008 | void *bypass_addr; | |
f263a814 | 1009 | void *aux; |
a66886fe DB |
1010 | union { |
1011 | struct { | |
1012 | struct bpf_map *map; | |
1013 | u32 key; | |
1014 | } tail_call; | |
1015 | }; | |
cf71b174 | 1016 | bool tailcall_target_stable; |
a66886fe DB |
1017 | u8 adj_off; |
1018 | u16 reason; | |
a748c697 | 1019 | u32 insn_idx; |
a66886fe DB |
1020 | }; |
1021 | ||
3c32cc1b YS |
1022 | /* reg_type info for ctx arguments */ |
1023 | struct bpf_ctx_arg_aux { | |
1024 | u32 offset; | |
1025 | enum bpf_reg_type reg_type; | |
951cf368 | 1026 | u32 btf_id; |
3c32cc1b YS |
1027 | }; |
1028 | ||
541c3bad AN |
1029 | struct btf_mod_pair { |
1030 | struct btf *btf; | |
1031 | struct module *module; | |
1032 | }; | |
1033 | ||
e6ac2450 MKL |
1034 | struct bpf_kfunc_desc_tab; |
1035 | ||
09756af4 | 1036 | struct bpf_prog_aux { |
85192dbf | 1037 | atomic64_t refcnt; |
24701ece | 1038 | u32 used_map_cnt; |
541c3bad | 1039 | u32 used_btf_cnt; |
32bbe007 | 1040 | u32 max_ctx_offset; |
e647815a | 1041 | u32 max_pkt_offset; |
9df1c28b | 1042 | u32 max_tp_access; |
8726679a | 1043 | u32 stack_depth; |
dc4bb0e2 | 1044 | u32 id; |
ba64e7d8 YS |
1045 | u32 func_cnt; /* used by non-func prog as the number of func progs */ |
1046 | u32 func_idx; /* 0 for non-func prog, the index in func array for func prog */ | |
ccfe29eb | 1047 | u32 attach_btf_id; /* in-kernel BTF type id to attach to */ |
3c32cc1b | 1048 | u32 ctx_arg_info_size; |
afbf21dc YS |
1049 | u32 max_rdonly_access; |
1050 | u32 max_rdwr_access; | |
22dc4a0f | 1051 | struct btf *attach_btf; |
3c32cc1b | 1052 | const struct bpf_ctx_arg_aux *ctx_arg_info; |
3aac1ead THJ |
1053 | struct mutex dst_mutex; /* protects dst_* pointers below, *after* prog becomes visible */ |
1054 | struct bpf_prog *dst_prog; | |
1055 | struct bpf_trampoline *dst_trampoline; | |
4a1e7c0c THJ |
1056 | enum bpf_prog_type saved_dst_prog_type; |
1057 | enum bpf_attach_type saved_dst_attach_type; | |
a4b1d3c1 | 1058 | bool verifier_zext; /* Zero extensions has been inserted by verifier. */ |
9a18eedb | 1059 | bool offload_requested; |
38207291 | 1060 | bool attach_btf_trace; /* true if attaching to BTF-enabled raw tp */ |
8c1b6e69 | 1061 | bool func_proto_unreliable; |
1e6c62a8 | 1062 | bool sleepable; |
ebf7d1f5 | 1063 | bool tail_call_reachable; |
c2f2cdbe | 1064 | bool xdp_has_frags; |
38207291 MKL |
1065 | /* BTF_KIND_FUNC_PROTO for valid attach_btf_id */ |
1066 | const struct btf_type *attach_func_proto; | |
1067 | /* function name for valid attach_btf_id */ | |
1068 | const char *attach_func_name; | |
1c2a088a AS |
1069 | struct bpf_prog **func; |
1070 | void *jit_data; /* JIT specific data. arch dependent */ | |
a66886fe | 1071 | struct bpf_jit_poke_descriptor *poke_tab; |
e6ac2450 | 1072 | struct bpf_kfunc_desc_tab *kfunc_tab; |
2357672c | 1073 | struct bpf_kfunc_btf_tab *kfunc_btf_tab; |
a66886fe | 1074 | u32 size_poke_tab; |
535911c8 | 1075 | struct bpf_ksym ksym; |
7de16e3a | 1076 | const struct bpf_prog_ops *ops; |
09756af4 | 1077 | struct bpf_map **used_maps; |
984fe94f | 1078 | struct mutex used_maps_mutex; /* mutex for used_maps and used_map_cnt */ |
541c3bad | 1079 | struct btf_mod_pair *used_btfs; |
09756af4 | 1080 | struct bpf_prog *prog; |
aaac3ba9 | 1081 | struct user_struct *user; |
cb4d2b3f | 1082 | u64 load_time; /* ns since boottime */ |
aba64c7d | 1083 | u32 verified_insns; |
69fd337a | 1084 | int cgroup_atype; /* enum cgroup_bpf_attach_type */ |
8bad74f9 | 1085 | struct bpf_map *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE]; |
067cae47 | 1086 | char name[BPF_OBJ_NAME_LEN]; |
afdb09c7 CF |
1087 | #ifdef CONFIG_SECURITY |
1088 | void *security; | |
1089 | #endif | |
0a9c1991 | 1090 | struct bpf_prog_offload *offload; |
838e9690 | 1091 | struct btf *btf; |
ba64e7d8 | 1092 | struct bpf_func_info *func_info; |
8c1b6e69 | 1093 | struct bpf_func_info_aux *func_info_aux; |
c454a46b MKL |
1094 | /* bpf_line_info loaded from userspace. linfo->insn_off |
1095 | * has the xlated insn offset. | |
1096 | * Both the main and sub prog share the same linfo. | |
1097 | * The subprog can access its first linfo by | |
1098 | * using the linfo_idx. | |
1099 | */ | |
1100 | struct bpf_line_info *linfo; | |
1101 | /* jited_linfo is the jited addr of the linfo. It has a | |
1102 | * one to one mapping to linfo: | |
1103 | * jited_linfo[i] is the jited addr for the linfo[i]->insn_off. | |
1104 | * Both the main and sub prog share the same jited_linfo. | |
1105 | * The subprog can access its first jited_linfo by | |
1106 | * using the linfo_idx. | |
1107 | */ | |
1108 | void **jited_linfo; | |
ba64e7d8 | 1109 | u32 func_info_cnt; |
c454a46b MKL |
1110 | u32 nr_linfo; |
1111 | /* subprog can use linfo_idx to access its first linfo and | |
1112 | * jited_linfo. | |
1113 | * main prog always has linfo_idx == 0 | |
1114 | */ | |
1115 | u32 linfo_idx; | |
3dec541b AS |
1116 | u32 num_exentries; |
1117 | struct exception_table_entry *extable; | |
abf2e7d6 AS |
1118 | union { |
1119 | struct work_struct work; | |
1120 | struct rcu_head rcu; | |
1121 | }; | |
09756af4 AS |
1122 | }; |
1123 | ||
d687f621 DK |
1124 | struct bpf_prog { |
1125 | u16 pages; /* Number of allocated pages */ | |
1126 | u16 jited:1, /* Is our filter JIT'ed? */ | |
1127 | jit_requested:1,/* archs need to JIT the prog */ | |
1128 | gpl_compatible:1, /* Is filter GPL compatible? */ | |
1129 | cb_access:1, /* Is control block accessed? */ | |
1130 | dst_needed:1, /* Do we need dst entry? */ | |
1131 | blinding_requested:1, /* needs constant blinding */ | |
1132 | blinded:1, /* Was blinded */ | |
1133 | is_func:1, /* program is a bpf function */ | |
1134 | kprobe_override:1, /* Do we override a kprobe? */ | |
1135 | has_callchain_buf:1, /* callchain buffer allocated? */ | |
1136 | enforce_expected_attach_type:1, /* Enforce expected_attach_type checking at attach time */ | |
1137 | call_get_stack:1, /* Do we call bpf_get_stack() or bpf_get_stackid() */ | |
1138 | call_get_func_ip:1, /* Do we call get_func_ip() */ | |
1139 | tstamp_type_access:1; /* Accessed __sk_buff->tstamp_type */ | |
1140 | enum bpf_prog_type type; /* Type of BPF program */ | |
1141 | enum bpf_attach_type expected_attach_type; /* For some prog types */ | |
1142 | u32 len; /* Number of filter blocks */ | |
1143 | u32 jited_len; /* Size of jited insns in bytes */ | |
1144 | u8 tag[BPF_TAG_SIZE]; | |
1145 | struct bpf_prog_stats __percpu *stats; | |
1146 | int __percpu *active; | |
1147 | unsigned int (*bpf_func)(const void *ctx, | |
1148 | const struct bpf_insn *insn); | |
1149 | struct bpf_prog_aux *aux; /* Auxiliary fields */ | |
1150 | struct sock_fprog_kern *orig_prog; /* Original BPF program */ | |
1151 | /* Instructions for interpreter */ | |
1152 | union { | |
1153 | DECLARE_FLEX_ARRAY(struct sock_filter, insns); | |
1154 | DECLARE_FLEX_ARRAY(struct bpf_insn, insnsi); | |
1155 | }; | |
1156 | }; | |
1157 | ||
2beee5f5 | 1158 | struct bpf_array_aux { |
da765a2f DB |
1159 | /* Programs with direct jumps into programs part of this array. */ |
1160 | struct list_head poke_progs; | |
1161 | struct bpf_map *map; | |
1162 | struct mutex poke_mutex; | |
1163 | struct work_struct work; | |
2beee5f5 DB |
1164 | }; |
1165 | ||
6cc7d1e8 AN |
1166 | struct bpf_link { |
1167 | atomic64_t refcnt; | |
1168 | u32 id; | |
1169 | enum bpf_link_type type; | |
1170 | const struct bpf_link_ops *ops; | |
1171 | struct bpf_prog *prog; | |
1172 | struct work_struct work; | |
1173 | }; | |
1174 | ||
1175 | struct bpf_link_ops { | |
1176 | void (*release)(struct bpf_link *link); | |
1177 | void (*dealloc)(struct bpf_link *link); | |
73b11c2a | 1178 | int (*detach)(struct bpf_link *link); |
6cc7d1e8 AN |
1179 | int (*update_prog)(struct bpf_link *link, struct bpf_prog *new_prog, |
1180 | struct bpf_prog *old_prog); | |
1181 | void (*show_fdinfo)(const struct bpf_link *link, struct seq_file *seq); | |
1182 | int (*fill_link_info)(const struct bpf_link *link, | |
1183 | struct bpf_link_info *info); | |
1184 | }; | |
1185 | ||
f7e0beaf KFL |
1186 | struct bpf_tramp_link { |
1187 | struct bpf_link link; | |
1188 | struct hlist_node tramp_hlist; | |
2fcc8241 | 1189 | u64 cookie; |
f7e0beaf KFL |
1190 | }; |
1191 | ||
69fd337a SF |
1192 | struct bpf_shim_tramp_link { |
1193 | struct bpf_tramp_link link; | |
1194 | struct bpf_trampoline *trampoline; | |
1195 | }; | |
1196 | ||
f7e0beaf KFL |
1197 | struct bpf_tracing_link { |
1198 | struct bpf_tramp_link link; | |
1199 | enum bpf_attach_type attach_type; | |
1200 | struct bpf_trampoline *trampoline; | |
1201 | struct bpf_prog *tgt_prog; | |
1202 | }; | |
1203 | ||
6cc7d1e8 AN |
1204 | struct bpf_link_primer { |
1205 | struct bpf_link *link; | |
1206 | struct file *file; | |
1207 | int fd; | |
1208 | u32 id; | |
1209 | }; | |
1210 | ||
85d33df3 | 1211 | struct bpf_struct_ops_value; |
27ae7997 MKL |
1212 | struct btf_member; |
1213 | ||
1214 | #define BPF_STRUCT_OPS_MAX_NR_MEMBERS 64 | |
1215 | struct bpf_struct_ops { | |
1216 | const struct bpf_verifier_ops *verifier_ops; | |
1217 | int (*init)(struct btf *btf); | |
1218 | int (*check_member)(const struct btf_type *t, | |
1219 | const struct btf_member *member); | |
85d33df3 MKL |
1220 | int (*init_member)(const struct btf_type *t, |
1221 | const struct btf_member *member, | |
1222 | void *kdata, const void *udata); | |
1223 | int (*reg)(void *kdata); | |
1224 | void (*unreg)(void *kdata); | |
27ae7997 | 1225 | const struct btf_type *type; |
85d33df3 | 1226 | const struct btf_type *value_type; |
27ae7997 MKL |
1227 | const char *name; |
1228 | struct btf_func_model func_models[BPF_STRUCT_OPS_MAX_NR_MEMBERS]; | |
1229 | u32 type_id; | |
85d33df3 | 1230 | u32 value_id; |
27ae7997 MKL |
1231 | }; |
1232 | ||
1233 | #if defined(CONFIG_BPF_JIT) && defined(CONFIG_BPF_SYSCALL) | |
85d33df3 | 1234 | #define BPF_MODULE_OWNER ((void *)((0xeB9FUL << 2) + POISON_POINTER_DELTA)) |
27ae7997 | 1235 | const struct bpf_struct_ops *bpf_struct_ops_find(u32 type_id); |
d3e42bb0 | 1236 | void bpf_struct_ops_init(struct btf *btf, struct bpf_verifier_log *log); |
85d33df3 MKL |
1237 | bool bpf_struct_ops_get(const void *kdata); |
1238 | void bpf_struct_ops_put(const void *kdata); | |
1239 | int bpf_struct_ops_map_sys_lookup_elem(struct bpf_map *map, void *key, | |
1240 | void *value); | |
f7e0beaf KFL |
1241 | int bpf_struct_ops_prepare_trampoline(struct bpf_tramp_links *tlinks, |
1242 | struct bpf_tramp_link *link, | |
31a645ae HT |
1243 | const struct btf_func_model *model, |
1244 | void *image, void *image_end); | |
85d33df3 MKL |
1245 | static inline bool bpf_try_module_get(const void *data, struct module *owner) |
1246 | { | |
1247 | if (owner == BPF_MODULE_OWNER) | |
1248 | return bpf_struct_ops_get(data); | |
1249 | else | |
1250 | return try_module_get(owner); | |
1251 | } | |
1252 | static inline void bpf_module_put(const void *data, struct module *owner) | |
1253 | { | |
1254 | if (owner == BPF_MODULE_OWNER) | |
1255 | bpf_struct_ops_put(data); | |
1256 | else | |
1257 | module_put(owner); | |
1258 | } | |
c196906d HT |
1259 | |
1260 | #ifdef CONFIG_NET | |
1261 | /* Define it here to avoid the use of forward declaration */ | |
1262 | struct bpf_dummy_ops_state { | |
1263 | int val; | |
1264 | }; | |
1265 | ||
1266 | struct bpf_dummy_ops { | |
1267 | int (*test_1)(struct bpf_dummy_ops_state *cb); | |
1268 | int (*test_2)(struct bpf_dummy_ops_state *cb, int a1, unsigned short a2, | |
1269 | char a3, unsigned long a4); | |
1270 | }; | |
1271 | ||
1272 | int bpf_struct_ops_test_run(struct bpf_prog *prog, const union bpf_attr *kattr, | |
1273 | union bpf_attr __user *uattr); | |
1274 | #endif | |
27ae7997 MKL |
1275 | #else |
1276 | static inline const struct bpf_struct_ops *bpf_struct_ops_find(u32 type_id) | |
1277 | { | |
1278 | return NULL; | |
1279 | } | |
d3e42bb0 MKL |
1280 | static inline void bpf_struct_ops_init(struct btf *btf, |
1281 | struct bpf_verifier_log *log) | |
1282 | { | |
1283 | } | |
85d33df3 MKL |
1284 | static inline bool bpf_try_module_get(const void *data, struct module *owner) |
1285 | { | |
1286 | return try_module_get(owner); | |
1287 | } | |
1288 | static inline void bpf_module_put(const void *data, struct module *owner) | |
1289 | { | |
1290 | module_put(owner); | |
1291 | } | |
1292 | static inline int bpf_struct_ops_map_sys_lookup_elem(struct bpf_map *map, | |
1293 | void *key, | |
1294 | void *value) | |
1295 | { | |
1296 | return -EINVAL; | |
1297 | } | |
9cb61fda SF |
1298 | #endif |
1299 | ||
1300 | #if defined(CONFIG_CGROUP_BPF) && defined(CONFIG_BPF_LSM) | |
1301 | int bpf_trampoline_link_cgroup_shim(struct bpf_prog *prog, | |
1302 | int cgroup_atype); | |
1303 | void bpf_trampoline_unlink_cgroup_shim(struct bpf_prog *prog); | |
1304 | #else | |
69fd337a SF |
1305 | static inline int bpf_trampoline_link_cgroup_shim(struct bpf_prog *prog, |
1306 | int cgroup_atype) | |
1307 | { | |
1308 | return -EOPNOTSUPP; | |
1309 | } | |
1310 | static inline void bpf_trampoline_unlink_cgroup_shim(struct bpf_prog *prog) | |
1311 | { | |
1312 | } | |
27ae7997 MKL |
1313 | #endif |
1314 | ||
04fd61ab AS |
1315 | struct bpf_array { |
1316 | struct bpf_map map; | |
1317 | u32 elem_size; | |
b2157399 | 1318 | u32 index_mask; |
2beee5f5 | 1319 | struct bpf_array_aux *aux; |
04fd61ab AS |
1320 | union { |
1321 | char value[0] __aligned(8); | |
2a36f0b9 | 1322 | void *ptrs[0] __aligned(8); |
a10423b8 | 1323 | void __percpu *pptrs[0] __aligned(8); |
04fd61ab AS |
1324 | }; |
1325 | }; | |
3b1efb19 | 1326 | |
c04c0d2b | 1327 | #define BPF_COMPLEXITY_LIMIT_INSNS 1000000 /* yes. 1M insns */ |
ebf7f6f0 | 1328 | #define MAX_TAIL_CALL_CNT 33 |
04fd61ab | 1329 | |
1ade2371 EZ |
1330 | /* Maximum number of loops for bpf_loop */ |
1331 | #define BPF_MAX_LOOPS BIT(23) | |
1332 | ||
591fe988 DB |
1333 | #define BPF_F_ACCESS_MASK (BPF_F_RDONLY | \ |
1334 | BPF_F_RDONLY_PROG | \ | |
1335 | BPF_F_WRONLY | \ | |
1336 | BPF_F_WRONLY_PROG) | |
1337 | ||
1338 | #define BPF_MAP_CAN_READ BIT(0) | |
1339 | #define BPF_MAP_CAN_WRITE BIT(1) | |
1340 | ||
1341 | static inline u32 bpf_map_flags_to_cap(struct bpf_map *map) | |
1342 | { | |
1343 | u32 access_flags = map->map_flags & (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG); | |
1344 | ||
1345 | /* Combination of BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG is | |
1346 | * not possible. | |
1347 | */ | |
1348 | if (access_flags & BPF_F_RDONLY_PROG) | |
1349 | return BPF_MAP_CAN_READ; | |
1350 | else if (access_flags & BPF_F_WRONLY_PROG) | |
1351 | return BPF_MAP_CAN_WRITE; | |
1352 | else | |
1353 | return BPF_MAP_CAN_READ | BPF_MAP_CAN_WRITE; | |
1354 | } | |
1355 | ||
1356 | static inline bool bpf_map_flags_access_ok(u32 access_flags) | |
1357 | { | |
1358 | return (access_flags & (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG)) != | |
1359 | (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG); | |
1360 | } | |
1361 | ||
3b1efb19 DB |
1362 | struct bpf_event_entry { |
1363 | struct perf_event *event; | |
1364 | struct file *perf_file; | |
1365 | struct file *map_file; | |
1366 | struct rcu_head rcu; | |
1367 | }; | |
1368 | ||
f45d5b6c THJ |
1369 | static inline bool map_type_contains_progs(struct bpf_map *map) |
1370 | { | |
1371 | return map->map_type == BPF_MAP_TYPE_PROG_ARRAY || | |
1372 | map->map_type == BPF_MAP_TYPE_DEVMAP || | |
1373 | map->map_type == BPF_MAP_TYPE_CPUMAP; | |
1374 | } | |
1375 | ||
1376 | bool bpf_prog_map_compatible(struct bpf_map *map, const struct bpf_prog *fp); | |
f1f7714e | 1377 | int bpf_prog_calc_tag(struct bpf_prog *fp); |
bd570ff9 | 1378 | |
0756ea3e | 1379 | const struct bpf_func_proto *bpf_get_trace_printk_proto(void); |
10aceb62 | 1380 | const struct bpf_func_proto *bpf_get_trace_vprintk_proto(void); |
555c8a86 DB |
1381 | |
1382 | typedef unsigned long (*bpf_ctx_copy_t)(void *dst, const void *src, | |
aa7145c1 | 1383 | unsigned long off, unsigned long len); |
c64b7983 JS |
1384 | typedef u32 (*bpf_convert_ctx_access_t)(enum bpf_access_type type, |
1385 | const struct bpf_insn *src, | |
1386 | struct bpf_insn *dst, | |
1387 | struct bpf_prog *prog, | |
1388 | u32 *target_size); | |
555c8a86 DB |
1389 | |
1390 | u64 bpf_event_output(struct bpf_map *map, u64 flags, void *meta, u64 meta_size, | |
1391 | void *ctx, u64 ctx_size, bpf_ctx_copy_t ctx_copy); | |
04fd61ab | 1392 | |
324bda9e AS |
1393 | /* an array of programs to be executed under rcu_lock. |
1394 | * | |
1395 | * Typical usage: | |
055eb955 | 1396 | * ret = bpf_prog_run_array(rcu_dereference(&bpf_prog_array), ctx, bpf_prog_run); |
324bda9e AS |
1397 | * |
1398 | * the structure returned by bpf_prog_array_alloc() should be populated | |
1399 | * with program pointers and the last pointer must be NULL. | |
1400 | * The user has to keep refcnt on the program and make sure the program | |
1401 | * is removed from the array before bpf_prog_put(). | |
1402 | * The 'struct bpf_prog_array *' should only be replaced with xchg() | |
1403 | * since other cpus are walking the array of pointers in parallel. | |
1404 | */ | |
394e40a2 RG |
1405 | struct bpf_prog_array_item { |
1406 | struct bpf_prog *prog; | |
82e6b1ee AN |
1407 | union { |
1408 | struct bpf_cgroup_storage *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE]; | |
1409 | u64 bpf_cookie; | |
1410 | }; | |
394e40a2 RG |
1411 | }; |
1412 | ||
324bda9e AS |
1413 | struct bpf_prog_array { |
1414 | struct rcu_head rcu; | |
d7f10df8 | 1415 | struct bpf_prog_array_item items[]; |
324bda9e AS |
1416 | }; |
1417 | ||
46531a30 PB |
1418 | struct bpf_empty_prog_array { |
1419 | struct bpf_prog_array hdr; | |
1420 | struct bpf_prog *null_prog; | |
1421 | }; | |
1422 | ||
1423 | /* to avoid allocating empty bpf_prog_array for cgroups that | |
1424 | * don't have bpf program attached use one global 'bpf_empty_prog_array' | |
1425 | * It will not be modified the caller of bpf_prog_array_alloc() | |
1426 | * (since caller requested prog_cnt == 0) | |
1427 | * that pointer should be 'freed' by bpf_prog_array_free() | |
1428 | */ | |
1429 | extern struct bpf_empty_prog_array bpf_empty_prog_array; | |
1430 | ||
d29ab6e1 | 1431 | struct bpf_prog_array *bpf_prog_array_alloc(u32 prog_cnt, gfp_t flags); |
54e9c9d4 | 1432 | void bpf_prog_array_free(struct bpf_prog_array *progs); |
8c7dcb84 DK |
1433 | /* Use when traversal over the bpf_prog_array uses tasks_trace rcu */ |
1434 | void bpf_prog_array_free_sleepable(struct bpf_prog_array *progs); | |
54e9c9d4 | 1435 | int bpf_prog_array_length(struct bpf_prog_array *progs); |
0d01da6a | 1436 | bool bpf_prog_array_is_empty(struct bpf_prog_array *array); |
54e9c9d4 | 1437 | int bpf_prog_array_copy_to_user(struct bpf_prog_array *progs, |
468e2f64 | 1438 | __u32 __user *prog_ids, u32 cnt); |
324bda9e | 1439 | |
54e9c9d4 | 1440 | void bpf_prog_array_delete_safe(struct bpf_prog_array *progs, |
e87c6bc3 | 1441 | struct bpf_prog *old_prog); |
ce3aa9cc JS |
1442 | int bpf_prog_array_delete_safe_at(struct bpf_prog_array *array, int index); |
1443 | int bpf_prog_array_update_at(struct bpf_prog_array *array, int index, | |
1444 | struct bpf_prog *prog); | |
54e9c9d4 | 1445 | int bpf_prog_array_copy_info(struct bpf_prog_array *array, |
3a38bb98 YS |
1446 | u32 *prog_ids, u32 request_cnt, |
1447 | u32 *prog_cnt); | |
54e9c9d4 | 1448 | int bpf_prog_array_copy(struct bpf_prog_array *old_array, |
e87c6bc3 YS |
1449 | struct bpf_prog *exclude_prog, |
1450 | struct bpf_prog *include_prog, | |
82e6b1ee | 1451 | u64 bpf_cookie, |
e87c6bc3 YS |
1452 | struct bpf_prog_array **new_array); |
1453 | ||
c7603cfa AN |
1454 | struct bpf_run_ctx {}; |
1455 | ||
1456 | struct bpf_cg_run_ctx { | |
1457 | struct bpf_run_ctx run_ctx; | |
7d08c2c9 | 1458 | const struct bpf_prog_array_item *prog_item; |
c4dcfdd4 | 1459 | int retval; |
c7603cfa AN |
1460 | }; |
1461 | ||
82e6b1ee AN |
1462 | struct bpf_trace_run_ctx { |
1463 | struct bpf_run_ctx run_ctx; | |
1464 | u64 bpf_cookie; | |
1465 | }; | |
1466 | ||
e384c7b7 KFL |
1467 | struct bpf_tramp_run_ctx { |
1468 | struct bpf_run_ctx run_ctx; | |
1469 | u64 bpf_cookie; | |
1470 | struct bpf_run_ctx *saved_run_ctx; | |
1471 | }; | |
1472 | ||
7d08c2c9 AN |
1473 | static inline struct bpf_run_ctx *bpf_set_run_ctx(struct bpf_run_ctx *new_ctx) |
1474 | { | |
1475 | struct bpf_run_ctx *old_ctx = NULL; | |
1476 | ||
1477 | #ifdef CONFIG_BPF_SYSCALL | |
1478 | old_ctx = current->bpf_ctx; | |
1479 | current->bpf_ctx = new_ctx; | |
1480 | #endif | |
1481 | return old_ctx; | |
1482 | } | |
1483 | ||
1484 | static inline void bpf_reset_run_ctx(struct bpf_run_ctx *old_ctx) | |
1485 | { | |
1486 | #ifdef CONFIG_BPF_SYSCALL | |
1487 | current->bpf_ctx = old_ctx; | |
1488 | #endif | |
1489 | } | |
1490 | ||
77241217 SF |
1491 | /* BPF program asks to bypass CAP_NET_BIND_SERVICE in bind. */ |
1492 | #define BPF_RET_BIND_NO_CAP_NET_BIND_SERVICE (1 << 0) | |
1493 | /* BPF program asks to set CN on the packet. */ | |
1494 | #define BPF_RET_SET_CN (1 << 0) | |
1495 | ||
7d08c2c9 AN |
1496 | typedef u32 (*bpf_prog_run_fn)(const struct bpf_prog *prog, const void *ctx); |
1497 | ||
7d08c2c9 | 1498 | static __always_inline u32 |
055eb955 | 1499 | bpf_prog_run_array(const struct bpf_prog_array *array, |
7d08c2c9 AN |
1500 | const void *ctx, bpf_prog_run_fn run_prog) |
1501 | { | |
1502 | const struct bpf_prog_array_item *item; | |
1503 | const struct bpf_prog *prog; | |
82e6b1ee AN |
1504 | struct bpf_run_ctx *old_run_ctx; |
1505 | struct bpf_trace_run_ctx run_ctx; | |
7d08c2c9 AN |
1506 | u32 ret = 1; |
1507 | ||
055eb955 SF |
1508 | RCU_LOCKDEP_WARN(!rcu_read_lock_held(), "no rcu lock held"); |
1509 | ||
7d08c2c9 | 1510 | if (unlikely(!array)) |
055eb955 SF |
1511 | return ret; |
1512 | ||
1513 | migrate_disable(); | |
82e6b1ee | 1514 | old_run_ctx = bpf_set_run_ctx(&run_ctx.run_ctx); |
7d08c2c9 AN |
1515 | item = &array->items[0]; |
1516 | while ((prog = READ_ONCE(item->prog))) { | |
82e6b1ee | 1517 | run_ctx.bpf_cookie = item->bpf_cookie; |
7d08c2c9 AN |
1518 | ret &= run_prog(prog, ctx); |
1519 | item++; | |
1520 | } | |
82e6b1ee | 1521 | bpf_reset_run_ctx(old_run_ctx); |
7d08c2c9 AN |
1522 | migrate_enable(); |
1523 | return ret; | |
1524 | } | |
324bda9e | 1525 | |
8c7dcb84 DK |
1526 | /* Notes on RCU design for bpf_prog_arrays containing sleepable programs: |
1527 | * | |
1528 | * We use the tasks_trace rcu flavor read section to protect the bpf_prog_array | |
1529 | * overall. As a result, we must use the bpf_prog_array_free_sleepable | |
1530 | * in order to use the tasks_trace rcu grace period. | |
1531 | * | |
1532 | * When a non-sleepable program is inside the array, we take the rcu read | |
1533 | * section and disable preemption for that program alone, so it can access | |
1534 | * rcu-protected dynamically sized maps. | |
1535 | */ | |
1536 | static __always_inline u32 | |
1537 | bpf_prog_run_array_sleepable(const struct bpf_prog_array __rcu *array_rcu, | |
1538 | const void *ctx, bpf_prog_run_fn run_prog) | |
1539 | { | |
1540 | const struct bpf_prog_array_item *item; | |
1541 | const struct bpf_prog *prog; | |
1542 | const struct bpf_prog_array *array; | |
1543 | struct bpf_run_ctx *old_run_ctx; | |
1544 | struct bpf_trace_run_ctx run_ctx; | |
1545 | u32 ret = 1; | |
1546 | ||
1547 | might_fault(); | |
1548 | ||
1549 | rcu_read_lock_trace(); | |
1550 | migrate_disable(); | |
1551 | ||
1552 | array = rcu_dereference_check(array_rcu, rcu_read_lock_trace_held()); | |
1553 | if (unlikely(!array)) | |
1554 | goto out; | |
1555 | old_run_ctx = bpf_set_run_ctx(&run_ctx.run_ctx); | |
1556 | item = &array->items[0]; | |
1557 | while ((prog = READ_ONCE(item->prog))) { | |
1558 | if (!prog->aux->sleepable) | |
1559 | rcu_read_lock(); | |
1560 | ||
1561 | run_ctx.bpf_cookie = item->bpf_cookie; | |
1562 | ret &= run_prog(prog, ctx); | |
1563 | item++; | |
1564 | ||
1565 | if (!prog->aux->sleepable) | |
1566 | rcu_read_unlock(); | |
1567 | } | |
1568 | bpf_reset_run_ctx(old_run_ctx); | |
1569 | out: | |
1570 | migrate_enable(); | |
1571 | rcu_read_unlock_trace(); | |
1572 | return ret; | |
1573 | } | |
1574 | ||
89aa0758 | 1575 | #ifdef CONFIG_BPF_SYSCALL |
b121d1e7 | 1576 | DECLARE_PER_CPU(int, bpf_prog_active); |
d46edd67 | 1577 | extern struct mutex bpf_stats_enabled_mutex; |
b121d1e7 | 1578 | |
c518cfa0 TG |
1579 | /* |
1580 | * Block execution of BPF programs attached to instrumentation (perf, | |
1581 | * kprobes, tracepoints) to prevent deadlocks on map operations as any of | |
1582 | * these events can happen inside a region which holds a map bucket lock | |
1583 | * and can deadlock on it. | |
c518cfa0 TG |
1584 | */ |
1585 | static inline void bpf_disable_instrumentation(void) | |
1586 | { | |
1587 | migrate_disable(); | |
79364031 | 1588 | this_cpu_inc(bpf_prog_active); |
c518cfa0 TG |
1589 | } |
1590 | ||
1591 | static inline void bpf_enable_instrumentation(void) | |
1592 | { | |
79364031 | 1593 | this_cpu_dec(bpf_prog_active); |
c518cfa0 TG |
1594 | migrate_enable(); |
1595 | } | |
1596 | ||
f66e448c CF |
1597 | extern const struct file_operations bpf_map_fops; |
1598 | extern const struct file_operations bpf_prog_fops; | |
367ec3e4 | 1599 | extern const struct file_operations bpf_iter_fops; |
f66e448c | 1600 | |
91cc1a99 | 1601 | #define BPF_PROG_TYPE(_id, _name, prog_ctx_type, kern_ctx_type) \ |
7de16e3a JK |
1602 | extern const struct bpf_prog_ops _name ## _prog_ops; \ |
1603 | extern const struct bpf_verifier_ops _name ## _verifier_ops; | |
40077e0c JB |
1604 | #define BPF_MAP_TYPE(_id, _ops) \ |
1605 | extern const struct bpf_map_ops _ops; | |
f2e10bff | 1606 | #define BPF_LINK_TYPE(_id, _name) |
be9370a7 JB |
1607 | #include <linux/bpf_types.h> |
1608 | #undef BPF_PROG_TYPE | |
40077e0c | 1609 | #undef BPF_MAP_TYPE |
f2e10bff | 1610 | #undef BPF_LINK_TYPE |
0fc174de | 1611 | |
ab3f0063 | 1612 | extern const struct bpf_prog_ops bpf_offload_prog_ops; |
4f9218aa JK |
1613 | extern const struct bpf_verifier_ops tc_cls_act_analyzer_ops; |
1614 | extern const struct bpf_verifier_ops xdp_analyzer_ops; | |
1615 | ||
0fc174de | 1616 | struct bpf_prog *bpf_prog_get(u32 ufd); |
248f346f | 1617 | struct bpf_prog *bpf_prog_get_type_dev(u32 ufd, enum bpf_prog_type type, |
288b3de5 | 1618 | bool attach_drv); |
85192dbf | 1619 | void bpf_prog_add(struct bpf_prog *prog, int i); |
c540594f | 1620 | void bpf_prog_sub(struct bpf_prog *prog, int i); |
85192dbf | 1621 | void bpf_prog_inc(struct bpf_prog *prog); |
a6f6df69 | 1622 | struct bpf_prog * __must_check bpf_prog_inc_not_zero(struct bpf_prog *prog); |
61e021f3 DB |
1623 | void bpf_prog_put(struct bpf_prog *prog); |
1624 | ||
ad8ad79f | 1625 | void bpf_prog_free_id(struct bpf_prog *prog, bool do_idr_lock); |
a3884572 | 1626 | void bpf_map_free_id(struct bpf_map *map, bool do_idr_lock); |
ad8ad79f | 1627 | |
61df10c7 KKD |
1628 | struct bpf_map_value_off_desc *bpf_map_kptr_off_contains(struct bpf_map *map, u32 offset); |
1629 | void bpf_map_free_kptr_off_tab(struct bpf_map *map); | |
1630 | struct bpf_map_value_off *bpf_map_copy_kptr_off_tab(const struct bpf_map *map); | |
1631 | bool bpf_map_equal_kptr_off_tab(const struct bpf_map *map_a, const struct bpf_map *map_b); | |
14a324f6 | 1632 | void bpf_map_free_kptrs(struct bpf_map *map, void *map_value); |
61df10c7 | 1633 | |
1ed4d924 | 1634 | struct bpf_map *bpf_map_get(u32 ufd); |
c9da161c | 1635 | struct bpf_map *bpf_map_get_with_uref(u32 ufd); |
c2101297 | 1636 | struct bpf_map *__bpf_map_get(struct fd f); |
1e0bd5a0 AN |
1637 | void bpf_map_inc(struct bpf_map *map); |
1638 | void bpf_map_inc_with_uref(struct bpf_map *map); | |
1639 | struct bpf_map * __must_check bpf_map_inc_not_zero(struct bpf_map *map); | |
c9da161c | 1640 | void bpf_map_put_with_uref(struct bpf_map *map); |
61e021f3 | 1641 | void bpf_map_put(struct bpf_map *map); |
196e8ca7 DB |
1642 | void *bpf_map_area_alloc(u64 size, int numa_node); |
1643 | void *bpf_map_area_mmapable_alloc(u64 size, int numa_node); | |
d407bd25 | 1644 | void bpf_map_area_free(void *base); |
353050be | 1645 | bool bpf_map_write_active(const struct bpf_map *map); |
bd475643 | 1646 | void bpf_map_init_from_attr(struct bpf_map *map, union bpf_attr *attr); |
cb4d03ab BV |
1647 | int generic_map_lookup_batch(struct bpf_map *map, |
1648 | const union bpf_attr *attr, | |
aa2e93b8 BV |
1649 | union bpf_attr __user *uattr); |
1650 | int generic_map_update_batch(struct bpf_map *map, | |
1651 | const union bpf_attr *attr, | |
1652 | union bpf_attr __user *uattr); | |
1653 | int generic_map_delete_batch(struct bpf_map *map, | |
1654 | const union bpf_attr *attr, | |
cb4d03ab | 1655 | union bpf_attr __user *uattr); |
6086d29d | 1656 | struct bpf_map *bpf_map_get_curr_or_next(u32 *id); |
a228a64f | 1657 | struct bpf_prog *bpf_prog_get_curr_or_next(u32 *id); |
61e021f3 | 1658 | |
48edc1f7 RG |
1659 | #ifdef CONFIG_MEMCG_KMEM |
1660 | void *bpf_map_kmalloc_node(const struct bpf_map *map, size_t size, gfp_t flags, | |
1661 | int node); | |
1662 | void *bpf_map_kzalloc(const struct bpf_map *map, size_t size, gfp_t flags); | |
1663 | void __percpu *bpf_map_alloc_percpu(const struct bpf_map *map, size_t size, | |
1664 | size_t align, gfp_t flags); | |
1665 | #else | |
1666 | static inline void * | |
1667 | bpf_map_kmalloc_node(const struct bpf_map *map, size_t size, gfp_t flags, | |
1668 | int node) | |
1669 | { | |
1670 | return kmalloc_node(size, flags, node); | |
1671 | } | |
1672 | ||
1673 | static inline void * | |
1674 | bpf_map_kzalloc(const struct bpf_map *map, size_t size, gfp_t flags) | |
1675 | { | |
1676 | return kzalloc(size, flags); | |
1677 | } | |
1678 | ||
1679 | static inline void __percpu * | |
1680 | bpf_map_alloc_percpu(const struct bpf_map *map, size_t size, size_t align, | |
1681 | gfp_t flags) | |
1682 | { | |
1683 | return __alloc_percpu_gfp(size, align, flags); | |
1684 | } | |
1685 | #endif | |
1686 | ||
1be7f75d AS |
1687 | extern int sysctl_unprivileged_bpf_disabled; |
1688 | ||
2c78ee89 AS |
1689 | static inline bool bpf_allow_ptr_leaks(void) |
1690 | { | |
1691 | return perfmon_capable(); | |
1692 | } | |
1693 | ||
01f810ac AM |
1694 | static inline bool bpf_allow_uninit_stack(void) |
1695 | { | |
1696 | return perfmon_capable(); | |
1697 | } | |
1698 | ||
41c48f3a AI |
1699 | static inline bool bpf_allow_ptr_to_map_access(void) |
1700 | { | |
1701 | return perfmon_capable(); | |
1702 | } | |
1703 | ||
2c78ee89 AS |
1704 | static inline bool bpf_bypass_spec_v1(void) |
1705 | { | |
1706 | return perfmon_capable(); | |
1707 | } | |
1708 | ||
1709 | static inline bool bpf_bypass_spec_v4(void) | |
1710 | { | |
1711 | return perfmon_capable(); | |
1712 | } | |
1713 | ||
6e71b04a | 1714 | int bpf_map_new_fd(struct bpf_map *map, int flags); |
b2197755 DB |
1715 | int bpf_prog_new_fd(struct bpf_prog *prog); |
1716 | ||
f2e10bff | 1717 | void bpf_link_init(struct bpf_link *link, enum bpf_link_type type, |
a3b80e10 AN |
1718 | const struct bpf_link_ops *ops, struct bpf_prog *prog); |
1719 | int bpf_link_prime(struct bpf_link *link, struct bpf_link_primer *primer); | |
1720 | int bpf_link_settle(struct bpf_link_primer *primer); | |
1721 | void bpf_link_cleanup(struct bpf_link_primer *primer); | |
70ed506c AN |
1722 | void bpf_link_inc(struct bpf_link *link); |
1723 | void bpf_link_put(struct bpf_link *link); | |
1724 | int bpf_link_new_fd(struct bpf_link *link); | |
babf3164 | 1725 | struct file *bpf_link_new_file(struct bpf_link *link, int *reserved_fd); |
70ed506c | 1726 | struct bpf_link *bpf_link_get_from_fd(u32 ufd); |
9f883612 | 1727 | struct bpf_link *bpf_link_get_curr_or_next(u32 *id); |
70ed506c | 1728 | |
b2197755 | 1729 | int bpf_obj_pin_user(u32 ufd, const char __user *pathname); |
6e71b04a | 1730 | int bpf_obj_get_user(const char __user *pathname, int flags); |
b2197755 | 1731 | |
21aef70e | 1732 | #define BPF_ITER_FUNC_PREFIX "bpf_iter_" |
e5158d98 | 1733 | #define DEFINE_BPF_ITER_FUNC(target, args...) \ |
21aef70e YS |
1734 | extern int bpf_iter_ ## target(args); \ |
1735 | int __init bpf_iter_ ## target(args) { return 0; } | |
15d83c4d | 1736 | |
f9c79272 | 1737 | struct bpf_iter_aux_info { |
d4ccaf58 | 1738 | /* for map_elem iter */ |
a5cbe05a | 1739 | struct bpf_map *map; |
d4ccaf58 HL |
1740 | |
1741 | /* for cgroup iter */ | |
1742 | struct { | |
1743 | struct cgroup *start; /* starting cgroup */ | |
1744 | enum bpf_cgroup_iter_order order; | |
1745 | } cgroup; | |
f9c79272 YS |
1746 | }; |
1747 | ||
5e7b3020 YS |
1748 | typedef int (*bpf_iter_attach_target_t)(struct bpf_prog *prog, |
1749 | union bpf_iter_link_info *linfo, | |
1750 | struct bpf_iter_aux_info *aux); | |
1751 | typedef void (*bpf_iter_detach_target_t)(struct bpf_iter_aux_info *aux); | |
6b0a249a YS |
1752 | typedef void (*bpf_iter_show_fdinfo_t) (const struct bpf_iter_aux_info *aux, |
1753 | struct seq_file *seq); | |
1754 | typedef int (*bpf_iter_fill_link_info_t)(const struct bpf_iter_aux_info *aux, | |
1755 | struct bpf_link_info *info); | |
3cee6fb8 MKL |
1756 | typedef const struct bpf_func_proto * |
1757 | (*bpf_iter_get_func_proto_t)(enum bpf_func_id func_id, | |
1758 | const struct bpf_prog *prog); | |
a5cbe05a | 1759 | |
cf83b2d2 YS |
1760 | enum bpf_iter_feature { |
1761 | BPF_ITER_RESCHED = BIT(0), | |
1762 | }; | |
1763 | ||
3c32cc1b | 1764 | #define BPF_ITER_CTX_ARG_MAX 2 |
ae24345d YS |
1765 | struct bpf_iter_reg { |
1766 | const char *target; | |
5e7b3020 YS |
1767 | bpf_iter_attach_target_t attach_target; |
1768 | bpf_iter_detach_target_t detach_target; | |
6b0a249a YS |
1769 | bpf_iter_show_fdinfo_t show_fdinfo; |
1770 | bpf_iter_fill_link_info_t fill_link_info; | |
3cee6fb8 | 1771 | bpf_iter_get_func_proto_t get_func_proto; |
3c32cc1b | 1772 | u32 ctx_arg_info_size; |
cf83b2d2 | 1773 | u32 feature; |
3c32cc1b | 1774 | struct bpf_ctx_arg_aux ctx_arg_info[BPF_ITER_CTX_ARG_MAX]; |
14fc6bd6 | 1775 | const struct bpf_iter_seq_info *seq_info; |
ae24345d YS |
1776 | }; |
1777 | ||
e5158d98 YS |
1778 | struct bpf_iter_meta { |
1779 | __bpf_md_ptr(struct seq_file *, seq); | |
1780 | u64 session_id; | |
1781 | u64 seq_num; | |
1782 | }; | |
1783 | ||
a5cbe05a YS |
1784 | struct bpf_iter__bpf_map_elem { |
1785 | __bpf_md_ptr(struct bpf_iter_meta *, meta); | |
1786 | __bpf_md_ptr(struct bpf_map *, map); | |
1787 | __bpf_md_ptr(void *, key); | |
1788 | __bpf_md_ptr(void *, value); | |
1789 | }; | |
1790 | ||
15172a46 | 1791 | int bpf_iter_reg_target(const struct bpf_iter_reg *reg_info); |
ab2ee4fc | 1792 | void bpf_iter_unreg_target(const struct bpf_iter_reg *reg_info); |
15d83c4d | 1793 | bool bpf_iter_prog_supported(struct bpf_prog *prog); |
3cee6fb8 MKL |
1794 | const struct bpf_func_proto * |
1795 | bpf_iter_get_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog); | |
af2ac3e1 | 1796 | int bpf_iter_link_attach(const union bpf_attr *attr, bpfptr_t uattr, struct bpf_prog *prog); |
ac51d99b | 1797 | int bpf_iter_new_fd(struct bpf_link *link); |
367ec3e4 | 1798 | bool bpf_link_is_iter(struct bpf_link *link); |
e5158d98 YS |
1799 | struct bpf_prog *bpf_iter_get_info(struct bpf_iter_meta *meta, bool in_stop); |
1800 | int bpf_iter_run_prog(struct bpf_prog *prog, void *ctx); | |
b76f2226 YS |
1801 | void bpf_iter_map_show_fdinfo(const struct bpf_iter_aux_info *aux, |
1802 | struct seq_file *seq); | |
1803 | int bpf_iter_map_fill_link_info(const struct bpf_iter_aux_info *aux, | |
1804 | struct bpf_link_info *info); | |
ae24345d | 1805 | |
314ee05e YS |
1806 | int map_set_for_each_callback_args(struct bpf_verifier_env *env, |
1807 | struct bpf_func_state *caller, | |
1808 | struct bpf_func_state *callee); | |
1809 | ||
15a07b33 AS |
1810 | int bpf_percpu_hash_copy(struct bpf_map *map, void *key, void *value); |
1811 | int bpf_percpu_array_copy(struct bpf_map *map, void *key, void *value); | |
1812 | int bpf_percpu_hash_update(struct bpf_map *map, void *key, void *value, | |
1813 | u64 flags); | |
1814 | int bpf_percpu_array_update(struct bpf_map *map, void *key, void *value, | |
1815 | u64 flags); | |
d056a788 | 1816 | |
557c0c6e | 1817 | int bpf_stackmap_copy(struct bpf_map *map, void *key, void *value); |
15a07b33 | 1818 | |
d056a788 DB |
1819 | int bpf_fd_array_map_update_elem(struct bpf_map *map, struct file *map_file, |
1820 | void *key, void *value, u64 map_flags); | |
14dc6f04 | 1821 | int bpf_fd_array_map_lookup_elem(struct bpf_map *map, void *key, u32 *value); |
bcc6b1b7 MKL |
1822 | int bpf_fd_htab_map_update_elem(struct bpf_map *map, struct file *map_file, |
1823 | void *key, void *value, u64 map_flags); | |
14dc6f04 | 1824 | int bpf_fd_htab_map_lookup_elem(struct bpf_map *map, void *key, u32 *value); |
d056a788 | 1825 | |
6e71b04a | 1826 | int bpf_get_file_flag(int flags); |
af2ac3e1 | 1827 | int bpf_check_uarg_tail_zero(bpfptr_t uaddr, size_t expected_size, |
dcab51f1 | 1828 | size_t actual_size); |
6e71b04a | 1829 | |
15a07b33 AS |
1830 | /* memcpy that is used with 8-byte aligned pointers, power-of-8 size and |
1831 | * forced to use 'long' read/writes to try to atomically copy long counters. | |
1832 | * Best-effort only. No barriers here, since it _will_ race with concurrent | |
1833 | * updates from BPF programs. Called from bpf syscall and mostly used with | |
1834 | * size 8 or 16 bytes, so ask compiler to inline it. | |
1835 | */ | |
1836 | static inline void bpf_long_memcpy(void *dst, const void *src, u32 size) | |
1837 | { | |
1838 | const long *lsrc = src; | |
1839 | long *ldst = dst; | |
1840 | ||
1841 | size /= sizeof(long); | |
1842 | while (size--) | |
1843 | *ldst++ = *lsrc++; | |
1844 | } | |
1845 | ||
61e021f3 | 1846 | /* verify correctness of eBPF program */ |
af2ac3e1 | 1847 | int bpf_check(struct bpf_prog **fp, union bpf_attr *attr, bpfptr_t uattr); |
a643bff7 AN |
1848 | |
1849 | #ifndef CONFIG_BPF_JIT_ALWAYS_ON | |
1ea47e01 | 1850 | void bpf_patch_call_args(struct bpf_insn *insn, u32 stack_depth); |
a643bff7 | 1851 | #endif |
46f55cff | 1852 | |
76654e67 AM |
1853 | struct btf *bpf_get_btf_vmlinux(void); |
1854 | ||
46f55cff | 1855 | /* Map specifics */ |
d53ad5d8 | 1856 | struct xdp_frame; |
6d5fc195 | 1857 | struct sk_buff; |
e6a4750f BT |
1858 | struct bpf_dtab_netdev; |
1859 | struct bpf_cpu_map_entry; | |
67f29e07 | 1860 | |
1d233886 | 1861 | void __dev_flush(void); |
d53ad5d8 | 1862 | int dev_xdp_enqueue(struct net_device *dev, struct xdp_frame *xdpf, |
1d233886 | 1863 | struct net_device *dev_rx); |
d53ad5d8 | 1864 | int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_frame *xdpf, |
38edddb8 | 1865 | struct net_device *dev_rx); |
d53ad5d8 | 1866 | int dev_map_enqueue_multi(struct xdp_frame *xdpf, struct net_device *dev_rx, |
e624d4ed | 1867 | struct bpf_map *map, bool exclude_ingress); |
6d5fc195 TM |
1868 | int dev_map_generic_redirect(struct bpf_dtab_netdev *dst, struct sk_buff *skb, |
1869 | struct bpf_prog *xdp_prog); | |
e624d4ed HL |
1870 | int dev_map_redirect_multi(struct net_device *dev, struct sk_buff *skb, |
1871 | struct bpf_prog *xdp_prog, struct bpf_map *map, | |
1872 | bool exclude_ingress); | |
46f55cff | 1873 | |
cdfafe98 | 1874 | void __cpu_map_flush(void); |
d53ad5d8 | 1875 | int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu, struct xdp_frame *xdpf, |
9c270af3 | 1876 | struct net_device *dev_rx); |
11941f8a KKD |
1877 | int cpu_map_generic_redirect(struct bpf_cpu_map_entry *rcpu, |
1878 | struct sk_buff *skb); | |
9c270af3 | 1879 | |
96eabe7a MKL |
1880 | /* Return map's numa specified by userspace */ |
1881 | static inline int bpf_map_attr_numa_node(const union bpf_attr *attr) | |
1882 | { | |
1883 | return (attr->map_flags & BPF_F_NUMA_NODE) ? | |
1884 | attr->numa_node : NUMA_NO_NODE; | |
1885 | } | |
1886 | ||
040ee692 | 1887 | struct bpf_prog *bpf_prog_get_type_path(const char *name, enum bpf_prog_type type); |
5dc4c4b7 | 1888 | int array_map_alloc_check(union bpf_attr *attr); |
040ee692 | 1889 | |
c695865c SF |
1890 | int bpf_prog_test_run_xdp(struct bpf_prog *prog, const union bpf_attr *kattr, |
1891 | union bpf_attr __user *uattr); | |
1892 | int bpf_prog_test_run_skb(struct bpf_prog *prog, const union bpf_attr *kattr, | |
1893 | union bpf_attr __user *uattr); | |
da00d2f1 KS |
1894 | int bpf_prog_test_run_tracing(struct bpf_prog *prog, |
1895 | const union bpf_attr *kattr, | |
1896 | union bpf_attr __user *uattr); | |
c695865c SF |
1897 | int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog, |
1898 | const union bpf_attr *kattr, | |
1899 | union bpf_attr __user *uattr); | |
1b4d60ec SL |
1900 | int bpf_prog_test_run_raw_tp(struct bpf_prog *prog, |
1901 | const union bpf_attr *kattr, | |
1902 | union bpf_attr __user *uattr); | |
7c32e8f8 LB |
1903 | int bpf_prog_test_run_sk_lookup(struct bpf_prog *prog, |
1904 | const union bpf_attr *kattr, | |
1905 | union bpf_attr __user *uattr); | |
9e15db66 AS |
1906 | bool btf_ctx_access(int off, int size, enum bpf_access_type type, |
1907 | const struct bpf_prog *prog, | |
1908 | struct bpf_insn_access_aux *info); | |
35346ab6 HT |
1909 | |
1910 | static inline bool bpf_tracing_ctx_access(int off, int size, | |
1911 | enum bpf_access_type type) | |
1912 | { | |
1913 | if (off < 0 || off >= sizeof(__u64) * MAX_BPF_FUNC_ARGS) | |
1914 | return false; | |
1915 | if (type != BPF_READ) | |
1916 | return false; | |
1917 | if (off % size != 0) | |
1918 | return false; | |
1919 | return true; | |
1920 | } | |
1921 | ||
1922 | static inline bool bpf_tracing_btf_ctx_access(int off, int size, | |
1923 | enum bpf_access_type type, | |
1924 | const struct bpf_prog *prog, | |
1925 | struct bpf_insn_access_aux *info) | |
1926 | { | |
1927 | if (!bpf_tracing_ctx_access(off, size, type)) | |
1928 | return false; | |
1929 | return btf_ctx_access(off, size, type, prog, info); | |
1930 | } | |
1931 | ||
22dc4a0f | 1932 | int btf_struct_access(struct bpf_verifier_log *log, const struct btf *btf, |
9e15db66 AS |
1933 | const struct btf_type *t, int off, int size, |
1934 | enum bpf_access_type atype, | |
c6f1bfe8 | 1935 | u32 *next_btf_id, enum bpf_type_flag *flag); |
faaf4a79 | 1936 | bool btf_struct_ids_match(struct bpf_verifier_log *log, |
22dc4a0f | 1937 | const struct btf *btf, u32 id, int off, |
2ab3b380 KKD |
1938 | const struct btf *need_btf, u32 need_type_id, |
1939 | bool strict); | |
9e15db66 | 1940 | |
fec56f58 AS |
1941 | int btf_distill_func_proto(struct bpf_verifier_log *log, |
1942 | struct btf *btf, | |
1943 | const struct btf_type *func_proto, | |
1944 | const char *func_name, | |
1945 | struct btf_func_model *m); | |
1946 | ||
51c39bb1 | 1947 | struct bpf_reg_state; |
34747c41 MKL |
1948 | int btf_check_subprog_arg_match(struct bpf_verifier_env *env, int subprog, |
1949 | struct bpf_reg_state *regs); | |
95f2f26f BT |
1950 | int btf_check_subprog_call(struct bpf_verifier_env *env, int subprog, |
1951 | struct bpf_reg_state *regs); | |
e6ac2450 MKL |
1952 | int btf_check_kfunc_arg_match(struct bpf_verifier_env *env, |
1953 | const struct btf *btf, u32 func_id, | |
a4703e31 KKD |
1954 | struct bpf_reg_state *regs, |
1955 | u32 kfunc_flags); | |
51c39bb1 AS |
1956 | int btf_prepare_func_args(struct bpf_verifier_env *env, int subprog, |
1957 | struct bpf_reg_state *reg); | |
efc68158 | 1958 | int btf_check_type_match(struct bpf_verifier_log *log, const struct bpf_prog *prog, |
be8704ff | 1959 | struct btf *btf, const struct btf_type *t); |
8c1b6e69 | 1960 | |
7e6897f9 | 1961 | struct bpf_prog *bpf_prog_by_id(u32 id); |
005142b8 | 1962 | struct bpf_link *bpf_link_by_id(u32 id); |
7e6897f9 | 1963 | |
6890896b | 1964 | const struct bpf_func_proto *bpf_base_func_proto(enum bpf_func_id func_id); |
a10787e6 | 1965 | void bpf_task_storage_free(struct task_struct *task); |
e6ac2450 MKL |
1966 | bool bpf_prog_has_kfunc_call(const struct bpf_prog *prog); |
1967 | const struct btf_func_model * | |
1968 | bpf_jit_find_kfunc_model(const struct bpf_prog *prog, | |
1969 | const struct bpf_insn *insn); | |
fbd94c7a AS |
1970 | struct bpf_core_ctx { |
1971 | struct bpf_verifier_log *log; | |
1972 | const struct btf *btf; | |
1973 | }; | |
1974 | ||
1975 | int bpf_core_apply(struct bpf_core_ctx *ctx, const struct bpf_core_relo *relo, | |
1976 | int relo_idx, void *insn); | |
1977 | ||
44a3918c JP |
1978 | static inline bool unprivileged_ebpf_enabled(void) |
1979 | { | |
1980 | return !sysctl_unprivileged_bpf_disabled; | |
1981 | } | |
1982 | ||
24426654 MKL |
1983 | /* Not all bpf prog type has the bpf_ctx. |
1984 | * For the bpf prog type that has initialized the bpf_ctx, | |
1985 | * this function can be used to decide if a kernel function | |
1986 | * is called by a bpf program. | |
1987 | */ | |
1988 | static inline bool has_current_bpf_ctx(void) | |
1989 | { | |
1990 | return !!current->bpf_ctx; | |
1991 | } | |
9c270af3 | 1992 | #else /* !CONFIG_BPF_SYSCALL */ |
0fc174de DB |
1993 | static inline struct bpf_prog *bpf_prog_get(u32 ufd) |
1994 | { | |
1995 | return ERR_PTR(-EOPNOTSUPP); | |
1996 | } | |
1997 | ||
248f346f JK |
1998 | static inline struct bpf_prog *bpf_prog_get_type_dev(u32 ufd, |
1999 | enum bpf_prog_type type, | |
288b3de5 | 2000 | bool attach_drv) |
248f346f JK |
2001 | { |
2002 | return ERR_PTR(-EOPNOTSUPP); | |
2003 | } | |
2004 | ||
85192dbf | 2005 | static inline void bpf_prog_add(struct bpf_prog *prog, int i) |
cc2e0b3f | 2006 | { |
cc2e0b3f | 2007 | } |
113214be | 2008 | |
c540594f DB |
2009 | static inline void bpf_prog_sub(struct bpf_prog *prog, int i) |
2010 | { | |
2011 | } | |
2012 | ||
0fc174de DB |
2013 | static inline void bpf_prog_put(struct bpf_prog *prog) |
2014 | { | |
2015 | } | |
6d67942d | 2016 | |
85192dbf | 2017 | static inline void bpf_prog_inc(struct bpf_prog *prog) |
aa6a5f3c | 2018 | { |
aa6a5f3c | 2019 | } |
5ccb071e | 2020 | |
a6f6df69 JF |
2021 | static inline struct bpf_prog *__must_check |
2022 | bpf_prog_inc_not_zero(struct bpf_prog *prog) | |
2023 | { | |
2024 | return ERR_PTR(-EOPNOTSUPP); | |
2025 | } | |
2026 | ||
6cc7d1e8 AN |
2027 | static inline void bpf_link_init(struct bpf_link *link, enum bpf_link_type type, |
2028 | const struct bpf_link_ops *ops, | |
2029 | struct bpf_prog *prog) | |
2030 | { | |
2031 | } | |
2032 | ||
2033 | static inline int bpf_link_prime(struct bpf_link *link, | |
2034 | struct bpf_link_primer *primer) | |
2035 | { | |
2036 | return -EOPNOTSUPP; | |
2037 | } | |
2038 | ||
2039 | static inline int bpf_link_settle(struct bpf_link_primer *primer) | |
2040 | { | |
2041 | return -EOPNOTSUPP; | |
2042 | } | |
2043 | ||
2044 | static inline void bpf_link_cleanup(struct bpf_link_primer *primer) | |
2045 | { | |
2046 | } | |
2047 | ||
2048 | static inline void bpf_link_inc(struct bpf_link *link) | |
2049 | { | |
2050 | } | |
2051 | ||
2052 | static inline void bpf_link_put(struct bpf_link *link) | |
2053 | { | |
2054 | } | |
2055 | ||
6e71b04a | 2056 | static inline int bpf_obj_get_user(const char __user *pathname, int flags) |
98589a09 SL |
2057 | { |
2058 | return -EOPNOTSUPP; | |
2059 | } | |
2060 | ||
1d233886 | 2061 | static inline void __dev_flush(void) |
46f55cff JF |
2062 | { |
2063 | } | |
9c270af3 | 2064 | |
d53ad5d8 | 2065 | struct xdp_frame; |
67f29e07 | 2066 | struct bpf_dtab_netdev; |
e6a4750f | 2067 | struct bpf_cpu_map_entry; |
67f29e07 | 2068 | |
1d233886 | 2069 | static inline |
d53ad5d8 | 2070 | int dev_xdp_enqueue(struct net_device *dev, struct xdp_frame *xdpf, |
1d233886 THJ |
2071 | struct net_device *dev_rx) |
2072 | { | |
2073 | return 0; | |
2074 | } | |
2075 | ||
67f29e07 | 2076 | static inline |
d53ad5d8 | 2077 | int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_frame *xdpf, |
38edddb8 | 2078 | struct net_device *dev_rx) |
67f29e07 JDB |
2079 | { |
2080 | return 0; | |
2081 | } | |
2082 | ||
e624d4ed | 2083 | static inline |
d53ad5d8 | 2084 | int dev_map_enqueue_multi(struct xdp_frame *xdpf, struct net_device *dev_rx, |
e624d4ed HL |
2085 | struct bpf_map *map, bool exclude_ingress) |
2086 | { | |
2087 | return 0; | |
2088 | } | |
2089 | ||
6d5fc195 TM |
2090 | struct sk_buff; |
2091 | ||
2092 | static inline int dev_map_generic_redirect(struct bpf_dtab_netdev *dst, | |
2093 | struct sk_buff *skb, | |
2094 | struct bpf_prog *xdp_prog) | |
2095 | { | |
2096 | return 0; | |
2097 | } | |
2098 | ||
e624d4ed HL |
2099 | static inline |
2100 | int dev_map_redirect_multi(struct net_device *dev, struct sk_buff *skb, | |
2101 | struct bpf_prog *xdp_prog, struct bpf_map *map, | |
2102 | bool exclude_ingress) | |
2103 | { | |
2104 | return 0; | |
2105 | } | |
2106 | ||
cdfafe98 | 2107 | static inline void __cpu_map_flush(void) |
9c270af3 JDB |
2108 | { |
2109 | } | |
2110 | ||
9c270af3 | 2111 | static inline int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu, |
d53ad5d8 | 2112 | struct xdp_frame *xdpf, |
9c270af3 JDB |
2113 | struct net_device *dev_rx) |
2114 | { | |
2115 | return 0; | |
2116 | } | |
040ee692 | 2117 | |
11941f8a KKD |
2118 | static inline int cpu_map_generic_redirect(struct bpf_cpu_map_entry *rcpu, |
2119 | struct sk_buff *skb) | |
2120 | { | |
2121 | return -EOPNOTSUPP; | |
2122 | } | |
2123 | ||
040ee692 AV |
2124 | static inline struct bpf_prog *bpf_prog_get_type_path(const char *name, |
2125 | enum bpf_prog_type type) | |
2126 | { | |
2127 | return ERR_PTR(-EOPNOTSUPP); | |
2128 | } | |
c695865c SF |
2129 | |
2130 | static inline int bpf_prog_test_run_xdp(struct bpf_prog *prog, | |
2131 | const union bpf_attr *kattr, | |
2132 | union bpf_attr __user *uattr) | |
2133 | { | |
2134 | return -ENOTSUPP; | |
2135 | } | |
2136 | ||
2137 | static inline int bpf_prog_test_run_skb(struct bpf_prog *prog, | |
2138 | const union bpf_attr *kattr, | |
2139 | union bpf_attr __user *uattr) | |
2140 | { | |
2141 | return -ENOTSUPP; | |
2142 | } | |
2143 | ||
da00d2f1 KS |
2144 | static inline int bpf_prog_test_run_tracing(struct bpf_prog *prog, |
2145 | const union bpf_attr *kattr, | |
2146 | union bpf_attr __user *uattr) | |
2147 | { | |
2148 | return -ENOTSUPP; | |
2149 | } | |
2150 | ||
c695865c SF |
2151 | static inline int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog, |
2152 | const union bpf_attr *kattr, | |
2153 | union bpf_attr __user *uattr) | |
2154 | { | |
2155 | return -ENOTSUPP; | |
2156 | } | |
6332be04 | 2157 | |
7c32e8f8 LB |
2158 | static inline int bpf_prog_test_run_sk_lookup(struct bpf_prog *prog, |
2159 | const union bpf_attr *kattr, | |
2160 | union bpf_attr __user *uattr) | |
2161 | { | |
2162 | return -ENOTSUPP; | |
2163 | } | |
2164 | ||
6332be04 DB |
2165 | static inline void bpf_map_put(struct bpf_map *map) |
2166 | { | |
2167 | } | |
7e6897f9 BT |
2168 | |
2169 | static inline struct bpf_prog *bpf_prog_by_id(u32 id) | |
2170 | { | |
2171 | return ERR_PTR(-ENOTSUPP); | |
2172 | } | |
6890896b SF |
2173 | |
2174 | static inline const struct bpf_func_proto * | |
2175 | bpf_base_func_proto(enum bpf_func_id func_id) | |
2176 | { | |
2177 | return NULL; | |
2178 | } | |
a10787e6 SL |
2179 | |
2180 | static inline void bpf_task_storage_free(struct task_struct *task) | |
2181 | { | |
2182 | } | |
e6ac2450 MKL |
2183 | |
2184 | static inline bool bpf_prog_has_kfunc_call(const struct bpf_prog *prog) | |
2185 | { | |
2186 | return false; | |
2187 | } | |
2188 | ||
2189 | static inline const struct btf_func_model * | |
2190 | bpf_jit_find_kfunc_model(const struct bpf_prog *prog, | |
2191 | const struct bpf_insn *insn) | |
2192 | { | |
2193 | return NULL; | |
2194 | } | |
44a3918c JP |
2195 | |
2196 | static inline bool unprivileged_ebpf_enabled(void) | |
2197 | { | |
2198 | return false; | |
2199 | } | |
2200 | ||
24426654 MKL |
2201 | static inline bool has_current_bpf_ctx(void) |
2202 | { | |
2203 | return false; | |
2204 | } | |
61e021f3 | 2205 | #endif /* CONFIG_BPF_SYSCALL */ |
09756af4 | 2206 | |
541c3bad AN |
2207 | void __bpf_free_used_btfs(struct bpf_prog_aux *aux, |
2208 | struct btf_mod_pair *used_btfs, u32 len); | |
2209 | ||
479321e9 JK |
2210 | static inline struct bpf_prog *bpf_prog_get_type(u32 ufd, |
2211 | enum bpf_prog_type type) | |
2212 | { | |
2213 | return bpf_prog_get_type_dev(ufd, type, false); | |
2214 | } | |
2215 | ||
936f8946 AN |
2216 | void __bpf_free_used_maps(struct bpf_prog_aux *aux, |
2217 | struct bpf_map **used_maps, u32 len); | |
2218 | ||
040ee692 AV |
2219 | bool bpf_prog_get_ok(struct bpf_prog *, enum bpf_prog_type *, bool); |
2220 | ||
ab3f0063 JK |
2221 | int bpf_prog_offload_compile(struct bpf_prog *prog); |
2222 | void bpf_prog_offload_destroy(struct bpf_prog *prog); | |
675fc275 JK |
2223 | int bpf_prog_offload_info_fill(struct bpf_prog_info *info, |
2224 | struct bpf_prog *prog); | |
ab3f0063 | 2225 | |
52775b33 JK |
2226 | int bpf_map_offload_info_fill(struct bpf_map_info *info, struct bpf_map *map); |
2227 | ||
a3884572 JK |
2228 | int bpf_map_offload_lookup_elem(struct bpf_map *map, void *key, void *value); |
2229 | int bpf_map_offload_update_elem(struct bpf_map *map, | |
2230 | void *key, void *value, u64 flags); | |
2231 | int bpf_map_offload_delete_elem(struct bpf_map *map, void *key); | |
2232 | int bpf_map_offload_get_next_key(struct bpf_map *map, | |
2233 | void *key, void *next_key); | |
2234 | ||
09728266 | 2235 | bool bpf_offload_prog_map_match(struct bpf_prog *prog, struct bpf_map *map); |
a3884572 | 2236 | |
1385d755 | 2237 | struct bpf_offload_dev * |
dd27c2e3 | 2238 | bpf_offload_dev_create(const struct bpf_prog_offload_ops *ops, void *priv); |
602144c2 | 2239 | void bpf_offload_dev_destroy(struct bpf_offload_dev *offdev); |
dd27c2e3 | 2240 | void *bpf_offload_dev_priv(struct bpf_offload_dev *offdev); |
602144c2 JK |
2241 | int bpf_offload_dev_netdev_register(struct bpf_offload_dev *offdev, |
2242 | struct net_device *netdev); | |
2243 | void bpf_offload_dev_netdev_unregister(struct bpf_offload_dev *offdev, | |
2244 | struct net_device *netdev); | |
fd4f227d | 2245 | bool bpf_offload_dev_match(struct bpf_prog *prog, struct net_device *netdev); |
9fd7c555 | 2246 | |
2147c438 JP |
2247 | void unpriv_ebpf_notify(int new_state); |
2248 | ||
ab3f0063 JK |
2249 | #if defined(CONFIG_NET) && defined(CONFIG_BPF_SYSCALL) |
2250 | int bpf_prog_offload_init(struct bpf_prog *prog, union bpf_attr *attr); | |
2251 | ||
0d830032 | 2252 | static inline bool bpf_prog_is_dev_bound(const struct bpf_prog_aux *aux) |
ab3f0063 | 2253 | { |
9a18eedb | 2254 | return aux->offload_requested; |
ab3f0063 | 2255 | } |
a3884572 JK |
2256 | |
2257 | static inline bool bpf_map_is_dev_bound(struct bpf_map *map) | |
2258 | { | |
2259 | return unlikely(map->ops == &bpf_map_offload_ops); | |
2260 | } | |
2261 | ||
2262 | struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr); | |
2263 | void bpf_map_offload_map_free(struct bpf_map *map); | |
79a7f8bd AS |
2264 | int bpf_prog_test_run_syscall(struct bpf_prog *prog, |
2265 | const union bpf_attr *kattr, | |
2266 | union bpf_attr __user *uattr); | |
17edea21 CW |
2267 | |
2268 | int sock_map_get_from_fd(const union bpf_attr *attr, struct bpf_prog *prog); | |
2269 | int sock_map_prog_detach(const union bpf_attr *attr, enum bpf_prog_type ptype); | |
2270 | int sock_map_update_elem_sys(struct bpf_map *map, void *key, void *value, u64 flags); | |
748cd572 DZ |
2271 | int sock_map_bpf_prog_query(const union bpf_attr *attr, |
2272 | union bpf_attr __user *uattr); | |
2273 | ||
17edea21 | 2274 | void sock_map_unhash(struct sock *sk); |
d8616ee2 | 2275 | void sock_map_destroy(struct sock *sk); |
17edea21 | 2276 | void sock_map_close(struct sock *sk, long timeout); |
ab3f0063 JK |
2277 | #else |
2278 | static inline int bpf_prog_offload_init(struct bpf_prog *prog, | |
2279 | union bpf_attr *attr) | |
2280 | { | |
2281 | return -EOPNOTSUPP; | |
2282 | } | |
2283 | ||
2284 | static inline bool bpf_prog_is_dev_bound(struct bpf_prog_aux *aux) | |
2285 | { | |
2286 | return false; | |
2287 | } | |
a3884572 JK |
2288 | |
2289 | static inline bool bpf_map_is_dev_bound(struct bpf_map *map) | |
2290 | { | |
2291 | return false; | |
2292 | } | |
2293 | ||
2294 | static inline struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr) | |
2295 | { | |
2296 | return ERR_PTR(-EOPNOTSUPP); | |
2297 | } | |
2298 | ||
2299 | static inline void bpf_map_offload_map_free(struct bpf_map *map) | |
2300 | { | |
2301 | } | |
79a7f8bd AS |
2302 | |
2303 | static inline int bpf_prog_test_run_syscall(struct bpf_prog *prog, | |
2304 | const union bpf_attr *kattr, | |
2305 | union bpf_attr __user *uattr) | |
2306 | { | |
2307 | return -ENOTSUPP; | |
2308 | } | |
fdb5c453 | 2309 | |
88759609 | 2310 | #ifdef CONFIG_BPF_SYSCALL |
604326b4 DB |
2311 | static inline int sock_map_get_from_fd(const union bpf_attr *attr, |
2312 | struct bpf_prog *prog) | |
fdb5c453 SY |
2313 | { |
2314 | return -EINVAL; | |
2315 | } | |
bb0de313 LB |
2316 | |
2317 | static inline int sock_map_prog_detach(const union bpf_attr *attr, | |
2318 | enum bpf_prog_type ptype) | |
2319 | { | |
2320 | return -EOPNOTSUPP; | |
2321 | } | |
13b79d3f LB |
2322 | |
2323 | static inline int sock_map_update_elem_sys(struct bpf_map *map, void *key, void *value, | |
2324 | u64 flags) | |
2325 | { | |
2326 | return -EOPNOTSUPP; | |
2327 | } | |
748cd572 DZ |
2328 | |
2329 | static inline int sock_map_bpf_prog_query(const union bpf_attr *attr, | |
2330 | union bpf_attr __user *uattr) | |
2331 | { | |
2332 | return -EINVAL; | |
2333 | } | |
17edea21 CW |
2334 | #endif /* CONFIG_BPF_SYSCALL */ |
2335 | #endif /* CONFIG_NET && CONFIG_BPF_SYSCALL */ | |
5dc4c4b7 | 2336 | |
17edea21 CW |
2337 | #if defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL) |
2338 | void bpf_sk_reuseport_detach(struct sock *sk); | |
2339 | int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map, void *key, | |
2340 | void *value); | |
2341 | int bpf_fd_reuseport_array_update_elem(struct bpf_map *map, void *key, | |
2342 | void *value, u64 map_flags); | |
2343 | #else | |
2344 | static inline void bpf_sk_reuseport_detach(struct sock *sk) | |
2345 | { | |
2346 | } | |
5dc4c4b7 | 2347 | |
17edea21 | 2348 | #ifdef CONFIG_BPF_SYSCALL |
5dc4c4b7 MKL |
2349 | static inline int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map, |
2350 | void *key, void *value) | |
2351 | { | |
2352 | return -EOPNOTSUPP; | |
2353 | } | |
2354 | ||
2355 | static inline int bpf_fd_reuseport_array_update_elem(struct bpf_map *map, | |
2356 | void *key, void *value, | |
2357 | u64 map_flags) | |
2358 | { | |
2359 | return -EOPNOTSUPP; | |
2360 | } | |
2361 | #endif /* CONFIG_BPF_SYSCALL */ | |
2362 | #endif /* defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL) */ | |
2363 | ||
d0003ec0 | 2364 | /* verifier prototypes for helper functions called from eBPF programs */ |
a2c83fff DB |
2365 | extern const struct bpf_func_proto bpf_map_lookup_elem_proto; |
2366 | extern const struct bpf_func_proto bpf_map_update_elem_proto; | |
2367 | extern const struct bpf_func_proto bpf_map_delete_elem_proto; | |
f1a2e44a MV |
2368 | extern const struct bpf_func_proto bpf_map_push_elem_proto; |
2369 | extern const struct bpf_func_proto bpf_map_pop_elem_proto; | |
2370 | extern const struct bpf_func_proto bpf_map_peek_elem_proto; | |
07343110 | 2371 | extern const struct bpf_func_proto bpf_map_lookup_percpu_elem_proto; |
d0003ec0 | 2372 | |
03e69b50 | 2373 | extern const struct bpf_func_proto bpf_get_prandom_u32_proto; |
c04167ce | 2374 | extern const struct bpf_func_proto bpf_get_smp_processor_id_proto; |
2d0e30c3 | 2375 | extern const struct bpf_func_proto bpf_get_numa_node_id_proto; |
04fd61ab | 2376 | extern const struct bpf_func_proto bpf_tail_call_proto; |
17ca8cbf | 2377 | extern const struct bpf_func_proto bpf_ktime_get_ns_proto; |
71d19214 | 2378 | extern const struct bpf_func_proto bpf_ktime_get_boot_ns_proto; |
c8996c98 | 2379 | extern const struct bpf_func_proto bpf_ktime_get_tai_ns_proto; |
ffeedafb AS |
2380 | extern const struct bpf_func_proto bpf_get_current_pid_tgid_proto; |
2381 | extern const struct bpf_func_proto bpf_get_current_uid_gid_proto; | |
2382 | extern const struct bpf_func_proto bpf_get_current_comm_proto; | |
d5a3b1f6 | 2383 | extern const struct bpf_func_proto bpf_get_stackid_proto; |
c195651e | 2384 | extern const struct bpf_func_proto bpf_get_stack_proto; |
fa28dcb8 | 2385 | extern const struct bpf_func_proto bpf_get_task_stack_proto; |
7b04d6d6 SL |
2386 | extern const struct bpf_func_proto bpf_get_stackid_proto_pe; |
2387 | extern const struct bpf_func_proto bpf_get_stack_proto_pe; | |
174a79ff | 2388 | extern const struct bpf_func_proto bpf_sock_map_update_proto; |
81110384 | 2389 | extern const struct bpf_func_proto bpf_sock_hash_update_proto; |
bf6fa2c8 | 2390 | extern const struct bpf_func_proto bpf_get_current_cgroup_id_proto; |
0f09abd1 | 2391 | extern const struct bpf_func_proto bpf_get_current_ancestor_cgroup_id_proto; |
bed89185 | 2392 | extern const struct bpf_func_proto bpf_get_cgroup_classid_curr_proto; |
604326b4 DB |
2393 | extern const struct bpf_func_proto bpf_msg_redirect_hash_proto; |
2394 | extern const struct bpf_func_proto bpf_msg_redirect_map_proto; | |
2395 | extern const struct bpf_func_proto bpf_sk_redirect_hash_proto; | |
2396 | extern const struct bpf_func_proto bpf_sk_redirect_map_proto; | |
d83525ca AS |
2397 | extern const struct bpf_func_proto bpf_spin_lock_proto; |
2398 | extern const struct bpf_func_proto bpf_spin_unlock_proto; | |
cd339431 | 2399 | extern const struct bpf_func_proto bpf_get_local_storage_proto; |
d7a4cb9b AI |
2400 | extern const struct bpf_func_proto bpf_strtol_proto; |
2401 | extern const struct bpf_func_proto bpf_strtoul_proto; | |
0d01da6a | 2402 | extern const struct bpf_func_proto bpf_tcp_sock_proto; |
5576b991 | 2403 | extern const struct bpf_func_proto bpf_jiffies64_proto; |
b4490c5c | 2404 | extern const struct bpf_func_proto bpf_get_ns_current_pid_tgid_proto; |
0456ea17 | 2405 | extern const struct bpf_func_proto bpf_event_output_data_proto; |
457f4436 AN |
2406 | extern const struct bpf_func_proto bpf_ringbuf_output_proto; |
2407 | extern const struct bpf_func_proto bpf_ringbuf_reserve_proto; | |
2408 | extern const struct bpf_func_proto bpf_ringbuf_submit_proto; | |
2409 | extern const struct bpf_func_proto bpf_ringbuf_discard_proto; | |
2410 | extern const struct bpf_func_proto bpf_ringbuf_query_proto; | |
bc34dee6 JK |
2411 | extern const struct bpf_func_proto bpf_ringbuf_reserve_dynptr_proto; |
2412 | extern const struct bpf_func_proto bpf_ringbuf_submit_dynptr_proto; | |
2413 | extern const struct bpf_func_proto bpf_ringbuf_discard_dynptr_proto; | |
af7ec138 | 2414 | extern const struct bpf_func_proto bpf_skc_to_tcp6_sock_proto; |
478cfbdf YS |
2415 | extern const struct bpf_func_proto bpf_skc_to_tcp_sock_proto; |
2416 | extern const struct bpf_func_proto bpf_skc_to_tcp_timewait_sock_proto; | |
2417 | extern const struct bpf_func_proto bpf_skc_to_tcp_request_sock_proto; | |
0d4fad3e | 2418 | extern const struct bpf_func_proto bpf_skc_to_udp6_sock_proto; |
9eeb3aa3 | 2419 | extern const struct bpf_func_proto bpf_skc_to_unix_sock_proto; |
3bc253c2 | 2420 | extern const struct bpf_func_proto bpf_skc_to_mptcp_sock_proto; |
07be4c4a | 2421 | extern const struct bpf_func_proto bpf_copy_from_user_proto; |
c4d0bfb4 | 2422 | extern const struct bpf_func_proto bpf_snprintf_btf_proto; |
7b15523a | 2423 | extern const struct bpf_func_proto bpf_snprintf_proto; |
eaa6bcb7 | 2424 | extern const struct bpf_func_proto bpf_per_cpu_ptr_proto; |
63d9b80d | 2425 | extern const struct bpf_func_proto bpf_this_cpu_ptr_proto; |
d0551261 | 2426 | extern const struct bpf_func_proto bpf_ktime_get_coarse_ns_proto; |
b60da495 | 2427 | extern const struct bpf_func_proto bpf_sock_from_file_proto; |
c5dbb89f | 2428 | extern const struct bpf_func_proto bpf_get_socket_ptr_cookie_proto; |
a10787e6 SL |
2429 | extern const struct bpf_func_proto bpf_task_storage_get_proto; |
2430 | extern const struct bpf_func_proto bpf_task_storage_delete_proto; | |
69c087ba | 2431 | extern const struct bpf_func_proto bpf_for_each_map_elem_proto; |
3d78417b | 2432 | extern const struct bpf_func_proto bpf_btf_find_by_name_kind_proto; |
3cee6fb8 MKL |
2433 | extern const struct bpf_func_proto bpf_sk_setsockopt_proto; |
2434 | extern const struct bpf_func_proto bpf_sk_getsockopt_proto; | |
9113d7e4 SF |
2435 | extern const struct bpf_func_proto bpf_unlocked_sk_setsockopt_proto; |
2436 | extern const struct bpf_func_proto bpf_unlocked_sk_getsockopt_proto; | |
7c7e3d31 | 2437 | extern const struct bpf_func_proto bpf_find_vma_proto; |
e6f2dd0f | 2438 | extern const struct bpf_func_proto bpf_loop_proto; |
376040e4 | 2439 | extern const struct bpf_func_proto bpf_copy_from_user_task_proto; |
69fd337a SF |
2440 | extern const struct bpf_func_proto bpf_set_retval_proto; |
2441 | extern const struct bpf_func_proto bpf_get_retval_proto; | |
cd339431 | 2442 | |
958a3f2d JO |
2443 | const struct bpf_func_proto *tracing_prog_func_proto( |
2444 | enum bpf_func_id func_id, const struct bpf_prog *prog); | |
2445 | ||
3ad00405 DB |
2446 | /* Shared helpers among cBPF and eBPF. */ |
2447 | void bpf_user_rnd_init_once(void); | |
2448 | u64 bpf_user_rnd_u32(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5); | |
6890896b | 2449 | u64 bpf_get_raw_cpu_id(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5); |
3ad00405 | 2450 | |
c64b7983 | 2451 | #if defined(CONFIG_NET) |
46f8bc92 MKL |
2452 | bool bpf_sock_common_is_valid_access(int off, int size, |
2453 | enum bpf_access_type type, | |
2454 | struct bpf_insn_access_aux *info); | |
c64b7983 JS |
2455 | bool bpf_sock_is_valid_access(int off, int size, enum bpf_access_type type, |
2456 | struct bpf_insn_access_aux *info); | |
2457 | u32 bpf_sock_convert_ctx_access(enum bpf_access_type type, | |
2458 | const struct bpf_insn *si, | |
2459 | struct bpf_insn *insn_buf, | |
2460 | struct bpf_prog *prog, | |
2461 | u32 *target_size); | |
2462 | #else | |
46f8bc92 MKL |
2463 | static inline bool bpf_sock_common_is_valid_access(int off, int size, |
2464 | enum bpf_access_type type, | |
2465 | struct bpf_insn_access_aux *info) | |
2466 | { | |
2467 | return false; | |
2468 | } | |
c64b7983 JS |
2469 | static inline bool bpf_sock_is_valid_access(int off, int size, |
2470 | enum bpf_access_type type, | |
2471 | struct bpf_insn_access_aux *info) | |
2472 | { | |
2473 | return false; | |
2474 | } | |
2475 | static inline u32 bpf_sock_convert_ctx_access(enum bpf_access_type type, | |
2476 | const struct bpf_insn *si, | |
2477 | struct bpf_insn *insn_buf, | |
2478 | struct bpf_prog *prog, | |
2479 | u32 *target_size) | |
2480 | { | |
2481 | return 0; | |
2482 | } | |
2483 | #endif | |
2484 | ||
655a51e5 | 2485 | #ifdef CONFIG_INET |
91cc1a99 AS |
2486 | struct sk_reuseport_kern { |
2487 | struct sk_buff *skb; | |
2488 | struct sock *sk; | |
2489 | struct sock *selected_sk; | |
d5e4ddae | 2490 | struct sock *migrating_sk; |
91cc1a99 AS |
2491 | void *data_end; |
2492 | u32 hash; | |
2493 | u32 reuseport_id; | |
2494 | bool bind_inany; | |
2495 | }; | |
655a51e5 MKL |
2496 | bool bpf_tcp_sock_is_valid_access(int off, int size, enum bpf_access_type type, |
2497 | struct bpf_insn_access_aux *info); | |
2498 | ||
2499 | u32 bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type, | |
2500 | const struct bpf_insn *si, | |
2501 | struct bpf_insn *insn_buf, | |
2502 | struct bpf_prog *prog, | |
2503 | u32 *target_size); | |
7f94208c Y |
2504 | |
2505 | bool bpf_xdp_sock_is_valid_access(int off, int size, enum bpf_access_type type, | |
2506 | struct bpf_insn_access_aux *info); | |
2507 | ||
2508 | u32 bpf_xdp_sock_convert_ctx_access(enum bpf_access_type type, | |
2509 | const struct bpf_insn *si, | |
2510 | struct bpf_insn *insn_buf, | |
2511 | struct bpf_prog *prog, | |
2512 | u32 *target_size); | |
655a51e5 MKL |
2513 | #else |
2514 | static inline bool bpf_tcp_sock_is_valid_access(int off, int size, | |
2515 | enum bpf_access_type type, | |
2516 | struct bpf_insn_access_aux *info) | |
2517 | { | |
2518 | return false; | |
2519 | } | |
2520 | ||
2521 | static inline u32 bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type, | |
2522 | const struct bpf_insn *si, | |
2523 | struct bpf_insn *insn_buf, | |
2524 | struct bpf_prog *prog, | |
2525 | u32 *target_size) | |
2526 | { | |
2527 | return 0; | |
2528 | } | |
7f94208c Y |
2529 | static inline bool bpf_xdp_sock_is_valid_access(int off, int size, |
2530 | enum bpf_access_type type, | |
2531 | struct bpf_insn_access_aux *info) | |
2532 | { | |
2533 | return false; | |
2534 | } | |
2535 | ||
2536 | static inline u32 bpf_xdp_sock_convert_ctx_access(enum bpf_access_type type, | |
2537 | const struct bpf_insn *si, | |
2538 | struct bpf_insn *insn_buf, | |
2539 | struct bpf_prog *prog, | |
2540 | u32 *target_size) | |
2541 | { | |
2542 | return 0; | |
2543 | } | |
655a51e5 MKL |
2544 | #endif /* CONFIG_INET */ |
2545 | ||
5964b200 | 2546 | enum bpf_text_poke_type { |
b553a6ec DB |
2547 | BPF_MOD_CALL, |
2548 | BPF_MOD_JUMP, | |
5964b200 | 2549 | }; |
4b3da77b | 2550 | |
5964b200 AS |
2551 | int bpf_arch_text_poke(void *ip, enum bpf_text_poke_type t, |
2552 | void *addr1, void *addr2); | |
2553 | ||
ebc1415d | 2554 | void *bpf_arch_text_copy(void *dst, void *src, size_t len); |
fe736565 | 2555 | int bpf_arch_text_invalidate(void *dst, size_t len); |
ebc1415d | 2556 | |
eae2e83e | 2557 | struct btf_id_set; |
2af30f11 | 2558 | bool btf_id_set_contains(const struct btf_id_set *set, u32 id); |
eae2e83e | 2559 | |
335ff499 DM |
2560 | #define MAX_BPRINTF_VARARGS 12 |
2561 | ||
48cac3f4 FR |
2562 | int bpf_bprintf_prepare(char *fmt, u32 fmt_size, const u64 *raw_args, |
2563 | u32 **bin_buf, u32 num_args); | |
2564 | void bpf_bprintf_cleanup(void); | |
d9c9e4db | 2565 | |
97e03f52 JK |
2566 | /* the implementation of the opaque uapi struct bpf_dynptr */ |
2567 | struct bpf_dynptr_kern { | |
2568 | void *data; | |
2569 | /* Size represents the number of usable bytes of dynptr data. | |
2570 | * If for example the offset is at 4 for a local dynptr whose data is | |
2571 | * of type u64, the number of usable bytes is 4. | |
2572 | * | |
2573 | * The upper 8 bits are reserved. It is as follows: | |
2574 | * Bits 0 - 23 = size | |
2575 | * Bits 24 - 30 = dynptr type | |
2576 | * Bit 31 = whether dynptr is read-only | |
2577 | */ | |
2578 | u32 size; | |
2579 | u32 offset; | |
2580 | } __aligned(8); | |
2581 | ||
2582 | enum bpf_dynptr_type { | |
2583 | BPF_DYNPTR_TYPE_INVALID, | |
2584 | /* Points to memory that is local to the bpf program */ | |
2585 | BPF_DYNPTR_TYPE_LOCAL, | |
bc34dee6 JK |
2586 | /* Underlying data is a ringbuf record */ |
2587 | BPF_DYNPTR_TYPE_RINGBUF, | |
97e03f52 JK |
2588 | }; |
2589 | ||
bc34dee6 JK |
2590 | void bpf_dynptr_init(struct bpf_dynptr_kern *ptr, void *data, |
2591 | enum bpf_dynptr_type type, u32 offset, u32 size); | |
2592 | void bpf_dynptr_set_null(struct bpf_dynptr_kern *ptr); | |
2593 | int bpf_dynptr_check_size(u32 size); | |
2594 | ||
c0e19f2c SF |
2595 | #ifdef CONFIG_BPF_LSM |
2596 | void bpf_cgroup_atype_get(u32 attach_btf_id, int cgroup_atype); | |
2597 | void bpf_cgroup_atype_put(int cgroup_atype); | |
2598 | #else | |
2599 | static inline void bpf_cgroup_atype_get(u32 attach_btf_id, int cgroup_atype) {} | |
2600 | static inline void bpf_cgroup_atype_put(int cgroup_atype) {} | |
2601 | #endif /* CONFIG_BPF_LSM */ | |
2602 | ||
99c55f7d | 2603 | #endif /* _LINUX_BPF_H */ |