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