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> |
c86df29d | 30 | #include <linux/static_call.h> |
ee53cbfb | 31 | #include <linux/memcontrol.h> |
99c55f7d | 32 | |
cae1927c | 33 | struct bpf_verifier_env; |
9e15db66 | 34 | struct bpf_verifier_log; |
3b1efb19 | 35 | struct perf_event; |
174a79ff | 36 | struct bpf_prog; |
da765a2f | 37 | struct bpf_prog_aux; |
99c55f7d | 38 | struct bpf_map; |
4f738adb | 39 | struct sock; |
a26ca7c9 | 40 | struct seq_file; |
1b2b234b | 41 | struct btf; |
e8d2bec0 | 42 | struct btf_type; |
3dec541b | 43 | struct exception_table_entry; |
ae24345d | 44 | struct seq_operations; |
f9c79272 | 45 | struct bpf_iter_aux_info; |
f836a56e KS |
46 | struct bpf_local_storage; |
47 | struct bpf_local_storage_map; | |
36e68442 | 48 | struct kobject; |
48edc1f7 | 49 | struct mem_cgroup; |
861de02e | 50 | struct module; |
69c087ba | 51 | struct bpf_func_state; |
00963a2e | 52 | struct ftrace_ops; |
d4ccaf58 | 53 | struct cgroup; |
99c55f7d | 54 | |
1b9ed84e QM |
55 | extern struct idr btf_idr; |
56 | extern spinlock_t btf_idr_lock; | |
36e68442 | 57 | extern struct kobject *btf_kobj; |
958cf2e2 KKD |
58 | extern struct bpf_mem_alloc bpf_global_ma; |
59 | extern bool bpf_global_ma_set; | |
1b9ed84e | 60 | |
102acbac | 61 | typedef u64 (*bpf_callback_t)(u64, u64, u64, u64, u64); |
f9c79272 YS |
62 | typedef int (*bpf_iter_init_seq_priv_t)(void *private_data, |
63 | struct bpf_iter_aux_info *aux); | |
14fc6bd6 | 64 | typedef void (*bpf_iter_fini_seq_priv_t)(void *private_data); |
af3f4134 SF |
65 | typedef unsigned int (*bpf_func_t)(const void *, |
66 | const struct bpf_insn *); | |
14fc6bd6 YS |
67 | struct bpf_iter_seq_info { |
68 | const struct seq_operations *seq_ops; | |
69 | bpf_iter_init_seq_priv_t init_seq_private; | |
70 | bpf_iter_fini_seq_priv_t fini_seq_private; | |
71 | u32 seq_priv_size; | |
72 | }; | |
73 | ||
5d903493 | 74 | /* map is generic key/value storage optionally accessible by eBPF programs */ |
99c55f7d AS |
75 | struct bpf_map_ops { |
76 | /* funcs callable from userspace (via syscall) */ | |
1110f3a9 | 77 | int (*map_alloc_check)(union bpf_attr *attr); |
99c55f7d | 78 | struct bpf_map *(*map_alloc)(union bpf_attr *attr); |
61d1b6a4 DB |
79 | void (*map_release)(struct bpf_map *map, struct file *map_file); |
80 | void (*map_free)(struct bpf_map *map); | |
db20fd2b | 81 | int (*map_get_next_key)(struct bpf_map *map, void *key, void *next_key); |
ba6b8de4 | 82 | void (*map_release_uref)(struct bpf_map *map); |
c6110222 | 83 | void *(*map_lookup_elem_sys_only)(struct bpf_map *map, void *key); |
cb4d03ab BV |
84 | int (*map_lookup_batch)(struct bpf_map *map, const union bpf_attr *attr, |
85 | union bpf_attr __user *uattr); | |
3e87f192 DS |
86 | int (*map_lookup_and_delete_elem)(struct bpf_map *map, void *key, |
87 | void *value, u64 flags); | |
05799638 YS |
88 | int (*map_lookup_and_delete_batch)(struct bpf_map *map, |
89 | const union bpf_attr *attr, | |
90 | union bpf_attr __user *uattr); | |
3af43ba4 HT |
91 | int (*map_update_batch)(struct bpf_map *map, struct file *map_file, |
92 | const union bpf_attr *attr, | |
aa2e93b8 BV |
93 | union bpf_attr __user *uattr); |
94 | int (*map_delete_batch)(struct bpf_map *map, const union bpf_attr *attr, | |
95 | union bpf_attr __user *uattr); | |
db20fd2b AS |
96 | |
97 | /* funcs callable from userspace and from eBPF programs */ | |
98 | void *(*map_lookup_elem)(struct bpf_map *map, void *key); | |
d7ba4cc9 JK |
99 | long (*map_update_elem)(struct bpf_map *map, void *key, void *value, u64 flags); |
100 | long (*map_delete_elem)(struct bpf_map *map, void *key); | |
101 | long (*map_push_elem)(struct bpf_map *map, void *value, u64 flags); | |
102 | long (*map_pop_elem)(struct bpf_map *map, void *value); | |
103 | long (*map_peek_elem)(struct bpf_map *map, void *value); | |
07343110 | 104 | void *(*map_lookup_percpu_elem)(struct bpf_map *map, void *key, u32 cpu); |
2a36f0b9 WN |
105 | |
106 | /* funcs called by prog_array and perf_event_array map */ | |
d056a788 DB |
107 | void *(*map_fd_get_ptr)(struct bpf_map *map, struct file *map_file, |
108 | int fd); | |
109 | void (*map_fd_put_ptr)(void *ptr); | |
4a8f87e6 | 110 | int (*map_gen_lookup)(struct bpf_map *map, struct bpf_insn *insn_buf); |
14dc6f04 | 111 | u32 (*map_fd_sys_lookup_elem)(void *ptr); |
a26ca7c9 MKL |
112 | void (*map_seq_show_elem)(struct bpf_map *map, void *key, |
113 | struct seq_file *m); | |
e8d2bec0 | 114 | int (*map_check_btf)(const struct bpf_map *map, |
1b2b234b | 115 | const struct btf *btf, |
e8d2bec0 DB |
116 | const struct btf_type *key_type, |
117 | const struct btf_type *value_type); | |
d8eca5bb | 118 | |
da765a2f DB |
119 | /* Prog poke tracking helpers. */ |
120 | int (*map_poke_track)(struct bpf_map *map, struct bpf_prog_aux *aux); | |
121 | void (*map_poke_untrack)(struct bpf_map *map, struct bpf_prog_aux *aux); | |
122 | void (*map_poke_run)(struct bpf_map *map, u32 key, struct bpf_prog *old, | |
123 | struct bpf_prog *new); | |
124 | ||
d8eca5bb DB |
125 | /* Direct value access helpers. */ |
126 | int (*map_direct_value_addr)(const struct bpf_map *map, | |
127 | u64 *imm, u32 off); | |
128 | int (*map_direct_value_meta)(const struct bpf_map *map, | |
129 | u64 imm, u32 *off); | |
fc970227 | 130 | int (*map_mmap)(struct bpf_map *map, struct vm_area_struct *vma); |
457f4436 AN |
131 | __poll_t (*map_poll)(struct bpf_map *map, struct file *filp, |
132 | struct poll_table_struct *pts); | |
41c48f3a | 133 | |
f836a56e KS |
134 | /* Functions called by bpf_local_storage maps */ |
135 | int (*map_local_storage_charge)(struct bpf_local_storage_map *smap, | |
136 | void *owner, u32 size); | |
137 | void (*map_local_storage_uncharge)(struct bpf_local_storage_map *smap, | |
138 | void *owner, u32 size); | |
139 | struct bpf_local_storage __rcu ** (*map_owner_storage_ptr)(void *owner); | |
f4d05259 | 140 | |
e6a4750f | 141 | /* Misc helpers.*/ |
d7ba4cc9 | 142 | long (*map_redirect)(struct bpf_map *map, u64 key, u64 flags); |
e6a4750f | 143 | |
f4d05259 MKL |
144 | /* map_meta_equal must be implemented for maps that can be |
145 | * used as an inner map. It is a runtime check to ensure | |
146 | * an inner map can be inserted to an outer map. | |
147 | * | |
148 | * Some properties of the inner map has been used during the | |
149 | * verification time. When inserting an inner map at the runtime, | |
150 | * map_meta_equal has to ensure the inserting map has the same | |
151 | * properties that the verifier has used earlier. | |
152 | */ | |
153 | bool (*map_meta_equal)(const struct bpf_map *meta0, | |
154 | const struct bpf_map *meta1); | |
155 | ||
69c087ba YS |
156 | |
157 | int (*map_set_for_each_callback_args)(struct bpf_verifier_env *env, | |
158 | struct bpf_func_state *caller, | |
159 | struct bpf_func_state *callee); | |
d7ba4cc9 | 160 | long (*map_for_each_callback)(struct bpf_map *map, |
102acbac | 161 | bpf_callback_t callback_fn, |
69c087ba YS |
162 | void *callback_ctx, u64 flags); |
163 | ||
90a5527d YS |
164 | u64 (*map_mem_usage)(const struct bpf_map *map); |
165 | ||
c317ab71 | 166 | /* BTF id of struct allocated by map_alloc */ |
41c48f3a | 167 | int *map_btf_id; |
a5cbe05a YS |
168 | |
169 | /* bpf_iter info used to open a seq_file */ | |
170 | const struct bpf_iter_seq_info *iter_seq_info; | |
99c55f7d AS |
171 | }; |
172 | ||
61df10c7 | 173 | enum { |
2d577252 KKD |
174 | /* Support at most 10 fields in a BTF type */ |
175 | BTF_FIELDS_MAX = 10, | |
61df10c7 KKD |
176 | }; |
177 | ||
aa3496ac | 178 | enum btf_field_type { |
db559117 KKD |
179 | BPF_SPIN_LOCK = (1 << 0), |
180 | BPF_TIMER = (1 << 1), | |
aa3496ac KKD |
181 | BPF_KPTR_UNREF = (1 << 2), |
182 | BPF_KPTR_REF = (1 << 3), | |
183 | BPF_KPTR = BPF_KPTR_UNREF | BPF_KPTR_REF, | |
f0c5941f | 184 | BPF_LIST_HEAD = (1 << 4), |
8ffa5cc1 | 185 | BPF_LIST_NODE = (1 << 5), |
9c395c1b DM |
186 | BPF_RB_ROOT = (1 << 6), |
187 | BPF_RB_NODE = (1 << 7), | |
188 | BPF_GRAPH_NODE_OR_ROOT = BPF_LIST_NODE | BPF_LIST_HEAD | | |
189 | BPF_RB_NODE | BPF_RB_ROOT, | |
d54730b5 | 190 | BPF_REFCOUNT = (1 << 8), |
c0a5a21c KKD |
191 | }; |
192 | ||
c8e18754 | 193 | typedef void (*btf_dtor_kfunc_t)(void *); |
c8e18754 | 194 | |
aa3496ac KKD |
195 | struct btf_field_kptr { |
196 | struct btf *btf; | |
197 | struct module *module; | |
9e36a204 DM |
198 | /* dtor used if btf_is_kernel(btf), otherwise the type is |
199 | * program-allocated, dtor is NULL, and __bpf_obj_drop_impl is used | |
200 | */ | |
201 | btf_dtor_kfunc_t dtor; | |
aa3496ac KKD |
202 | u32 btf_id; |
203 | }; | |
204 | ||
30465003 | 205 | struct btf_field_graph_root { |
f0c5941f KKD |
206 | struct btf *btf; |
207 | u32 value_btf_id; | |
208 | u32 node_offset; | |
865ce09a | 209 | struct btf_record *value_rec; |
f0c5941f KKD |
210 | }; |
211 | ||
aa3496ac | 212 | struct btf_field { |
61df10c7 | 213 | u32 offset; |
cd2a8079 | 214 | u32 size; |
aa3496ac KKD |
215 | enum btf_field_type type; |
216 | union { | |
217 | struct btf_field_kptr kptr; | |
30465003 | 218 | struct btf_field_graph_root graph_root; |
aa3496ac | 219 | }; |
61df10c7 KKD |
220 | }; |
221 | ||
aa3496ac KKD |
222 | struct btf_record { |
223 | u32 cnt; | |
224 | u32 field_mask; | |
db559117 KKD |
225 | int spin_lock_off; |
226 | int timer_off; | |
d54730b5 | 227 | int refcount_off; |
aa3496ac | 228 | struct btf_field fields[]; |
61df10c7 KKD |
229 | }; |
230 | ||
99c55f7d | 231 | struct bpf_map { |
a26ca7c9 | 232 | /* The first two cachelines with read-mostly members of which some |
be95a845 DB |
233 | * are also accessed in fast-path (e.g. ops, max_entries). |
234 | */ | |
235 | const struct bpf_map_ops *ops ____cacheline_aligned; | |
236 | struct bpf_map *inner_map_meta; | |
237 | #ifdef CONFIG_SECURITY | |
238 | void *security; | |
239 | #endif | |
99c55f7d AS |
240 | enum bpf_map_type map_type; |
241 | u32 key_size; | |
242 | u32 value_size; | |
243 | u32 max_entries; | |
9330986c | 244 | u64 map_extra; /* any per-map-type extra fields */ |
6c905981 | 245 | u32 map_flags; |
f3f1c054 | 246 | u32 id; |
db559117 | 247 | struct btf_record *record; |
96eabe7a | 248 | int numa_node; |
9b2cf328 MKL |
249 | u32 btf_key_type_id; |
250 | u32 btf_value_type_id; | |
8845b468 | 251 | u32 btf_vmlinux_value_type_id; |
a26ca7c9 | 252 | struct btf *btf; |
48edc1f7 | 253 | #ifdef CONFIG_MEMCG_KMEM |
4201d9ab | 254 | struct obj_cgroup *objcg; |
48edc1f7 | 255 | #endif |
fc970227 | 256 | char name[BPF_OBJ_NAME_LEN]; |
a26ca7c9 | 257 | /* The 3rd and 4th cacheline with misc members to avoid false sharing |
be95a845 DB |
258 | * particularly with refcounting. |
259 | */ | |
1e0bd5a0 AN |
260 | atomic64_t refcnt ____cacheline_aligned; |
261 | atomic64_t usercnt; | |
be95a845 | 262 | struct work_struct work; |
fc970227 | 263 | struct mutex freeze_mutex; |
353050be | 264 | atomic64_t writecnt; |
f45d5b6c THJ |
265 | /* 'Ownership' of program-containing map is claimed by the first program |
266 | * that is going to use this map or by the first program which FD is | |
267 | * stored in the map to make sure that all callers and callees have the | |
268 | * same prog type, JITed flag and xdp_has_frags flag. | |
269 | */ | |
270 | struct { | |
271 | spinlock_t lock; | |
272 | enum bpf_prog_type type; | |
273 | bool jited; | |
274 | bool xdp_has_frags; | |
275 | } owner; | |
4d7d7f69 KKD |
276 | bool bypass_spec_v1; |
277 | bool frozen; /* write-once; write-protected by freeze_mutex */ | |
99c55f7d AS |
278 | }; |
279 | ||
db559117 KKD |
280 | static inline const char *btf_field_type_name(enum btf_field_type type) |
281 | { | |
282 | switch (type) { | |
283 | case BPF_SPIN_LOCK: | |
284 | return "bpf_spin_lock"; | |
285 | case BPF_TIMER: | |
286 | return "bpf_timer"; | |
287 | case BPF_KPTR_UNREF: | |
288 | case BPF_KPTR_REF: | |
289 | return "kptr"; | |
f0c5941f KKD |
290 | case BPF_LIST_HEAD: |
291 | return "bpf_list_head"; | |
8ffa5cc1 KKD |
292 | case BPF_LIST_NODE: |
293 | return "bpf_list_node"; | |
9c395c1b DM |
294 | case BPF_RB_ROOT: |
295 | return "bpf_rb_root"; | |
296 | case BPF_RB_NODE: | |
297 | return "bpf_rb_node"; | |
d54730b5 DM |
298 | case BPF_REFCOUNT: |
299 | return "bpf_refcount"; | |
db559117 KKD |
300 | default: |
301 | WARN_ON_ONCE(1); | |
302 | return "unknown"; | |
303 | } | |
304 | } | |
305 | ||
aa3496ac KKD |
306 | static inline u32 btf_field_type_size(enum btf_field_type type) |
307 | { | |
308 | switch (type) { | |
db559117 KKD |
309 | case BPF_SPIN_LOCK: |
310 | return sizeof(struct bpf_spin_lock); | |
311 | case BPF_TIMER: | |
312 | return sizeof(struct bpf_timer); | |
aa3496ac KKD |
313 | case BPF_KPTR_UNREF: |
314 | case BPF_KPTR_REF: | |
315 | return sizeof(u64); | |
f0c5941f KKD |
316 | case BPF_LIST_HEAD: |
317 | return sizeof(struct bpf_list_head); | |
8ffa5cc1 KKD |
318 | case BPF_LIST_NODE: |
319 | return sizeof(struct bpf_list_node); | |
9c395c1b DM |
320 | case BPF_RB_ROOT: |
321 | return sizeof(struct bpf_rb_root); | |
322 | case BPF_RB_NODE: | |
323 | return sizeof(struct bpf_rb_node); | |
d54730b5 DM |
324 | case BPF_REFCOUNT: |
325 | return sizeof(struct bpf_refcount); | |
aa3496ac KKD |
326 | default: |
327 | WARN_ON_ONCE(1); | |
328 | return 0; | |
329 | } | |
330 | } | |
331 | ||
332 | static inline u32 btf_field_type_align(enum btf_field_type type) | |
333 | { | |
334 | switch (type) { | |
db559117 KKD |
335 | case BPF_SPIN_LOCK: |
336 | return __alignof__(struct bpf_spin_lock); | |
337 | case BPF_TIMER: | |
338 | return __alignof__(struct bpf_timer); | |
aa3496ac KKD |
339 | case BPF_KPTR_UNREF: |
340 | case BPF_KPTR_REF: | |
341 | return __alignof__(u64); | |
f0c5941f KKD |
342 | case BPF_LIST_HEAD: |
343 | return __alignof__(struct bpf_list_head); | |
8ffa5cc1 KKD |
344 | case BPF_LIST_NODE: |
345 | return __alignof__(struct bpf_list_node); | |
9c395c1b DM |
346 | case BPF_RB_ROOT: |
347 | return __alignof__(struct bpf_rb_root); | |
348 | case BPF_RB_NODE: | |
349 | return __alignof__(struct bpf_rb_node); | |
d54730b5 DM |
350 | case BPF_REFCOUNT: |
351 | return __alignof__(struct bpf_refcount); | |
aa3496ac KKD |
352 | default: |
353 | WARN_ON_ONCE(1); | |
354 | return 0; | |
355 | } | |
356 | } | |
357 | ||
3e81740a DM |
358 | static inline void bpf_obj_init_field(const struct btf_field *field, void *addr) |
359 | { | |
360 | memset(addr, 0, field->size); | |
361 | ||
362 | switch (field->type) { | |
363 | case BPF_REFCOUNT: | |
364 | refcount_set((refcount_t *)addr, 1); | |
365 | break; | |
366 | case BPF_RB_NODE: | |
367 | RB_CLEAR_NODE((struct rb_node *)addr); | |
368 | break; | |
369 | case BPF_LIST_HEAD: | |
370 | case BPF_LIST_NODE: | |
371 | INIT_LIST_HEAD((struct list_head *)addr); | |
372 | break; | |
373 | case BPF_RB_ROOT: | |
374 | /* RB_ROOT_CACHED 0-inits, no need to do anything after memset */ | |
375 | case BPF_SPIN_LOCK: | |
376 | case BPF_TIMER: | |
377 | case BPF_KPTR_UNREF: | |
378 | case BPF_KPTR_REF: | |
379 | break; | |
380 | default: | |
381 | WARN_ON_ONCE(1); | |
382 | return; | |
383 | } | |
384 | } | |
385 | ||
aa3496ac KKD |
386 | static inline bool btf_record_has_field(const struct btf_record *rec, enum btf_field_type type) |
387 | { | |
388 | if (IS_ERR_OR_NULL(rec)) | |
389 | return false; | |
390 | return rec->field_mask & type; | |
391 | } | |
392 | ||
cd2a8079 | 393 | static inline void bpf_obj_init(const struct btf_record *rec, void *obj) |
68134668 | 394 | { |
958cf2e2 | 395 | int i; |
4d7d7f69 | 396 | |
cd2a8079 | 397 | if (IS_ERR_OR_NULL(rec)) |
958cf2e2 | 398 | return; |
cd2a8079 | 399 | for (i = 0; i < rec->cnt; i++) |
3e81740a | 400 | bpf_obj_init_field(&rec->fields[i], obj + rec->fields[i].offset); |
958cf2e2 KKD |
401 | } |
402 | ||
997849c4 HT |
403 | /* 'dst' must be a temporary buffer and should not point to memory that is being |
404 | * used in parallel by a bpf program or bpf syscall, otherwise the access from | |
405 | * the bpf program or bpf syscall may be corrupted by the reinitialization, | |
406 | * leading to weird problems. Even 'dst' is newly-allocated from bpf memory | |
407 | * allocator, it is still possible for 'dst' to be used in parallel by a bpf | |
408 | * program or bpf syscall. | |
409 | */ | |
958cf2e2 KKD |
410 | static inline void check_and_init_map_value(struct bpf_map *map, void *dst) |
411 | { | |
cd2a8079 | 412 | bpf_obj_init(map->record, dst); |
68134668 AS |
413 | } |
414 | ||
44832519 KKD |
415 | /* memcpy that is used with 8-byte aligned pointers, power-of-8 size and |
416 | * forced to use 'long' read/writes to try to atomically copy long counters. | |
417 | * Best-effort only. No barriers here, since it _will_ race with concurrent | |
418 | * updates from BPF programs. Called from bpf syscall and mostly used with | |
419 | * size 8 or 16 bytes, so ask compiler to inline it. | |
420 | */ | |
421 | static inline void bpf_long_memcpy(void *dst, const void *src, u32 size) | |
422 | { | |
423 | const long *lsrc = src; | |
424 | long *ldst = dst; | |
425 | ||
426 | size /= sizeof(long); | |
427 | while (size--) | |
428 | *ldst++ = *lsrc++; | |
429 | } | |
430 | ||
431 | /* copy everything but bpf_spin_lock, bpf_timer, and kptrs. There could be one of each. */ | |
cd2a8079 | 432 | static inline void bpf_obj_memcpy(struct btf_record *rec, |
f71b2f64 KKD |
433 | void *dst, void *src, u32 size, |
434 | bool long_memcpy) | |
d83525ca | 435 | { |
4d7d7f69 KKD |
436 | u32 curr_off = 0; |
437 | int i; | |
68134668 | 438 | |
cd2a8079 | 439 | if (IS_ERR_OR_NULL(rec)) { |
44832519 | 440 | if (long_memcpy) |
f71b2f64 | 441 | bpf_long_memcpy(dst, src, round_up(size, 8)); |
44832519 | 442 | else |
f71b2f64 | 443 | memcpy(dst, src, size); |
4d7d7f69 | 444 | return; |
68134668 | 445 | } |
d83525ca | 446 | |
cd2a8079 DM |
447 | for (i = 0; i < rec->cnt; i++) { |
448 | u32 next_off = rec->fields[i].offset; | |
aa3496ac | 449 | u32 sz = next_off - curr_off; |
4d7d7f69 | 450 | |
aa3496ac | 451 | memcpy(dst + curr_off, src + curr_off, sz); |
cd2a8079 | 452 | curr_off += rec->fields[i].size + sz; |
d83525ca | 453 | } |
f71b2f64 | 454 | memcpy(dst + curr_off, src + curr_off, size - curr_off); |
d83525ca | 455 | } |
44832519 KKD |
456 | |
457 | static inline void copy_map_value(struct bpf_map *map, void *dst, void *src) | |
458 | { | |
cd2a8079 | 459 | bpf_obj_memcpy(map->record, dst, src, map->value_size, false); |
44832519 KKD |
460 | } |
461 | ||
462 | static inline void copy_map_value_long(struct bpf_map *map, void *dst, void *src) | |
463 | { | |
cd2a8079 | 464 | bpf_obj_memcpy(map->record, dst, src, map->value_size, true); |
44832519 KKD |
465 | } |
466 | ||
cd2a8079 | 467 | static inline void bpf_obj_memzero(struct btf_record *rec, void *dst, u32 size) |
cc487558 KKD |
468 | { |
469 | u32 curr_off = 0; | |
470 | int i; | |
471 | ||
cd2a8079 | 472 | if (IS_ERR_OR_NULL(rec)) { |
f71b2f64 | 473 | memset(dst, 0, size); |
cc487558 KKD |
474 | return; |
475 | } | |
476 | ||
cd2a8079 DM |
477 | for (i = 0; i < rec->cnt; i++) { |
478 | u32 next_off = rec->fields[i].offset; | |
aa3496ac | 479 | u32 sz = next_off - curr_off; |
cc487558 | 480 | |
aa3496ac | 481 | memset(dst + curr_off, 0, sz); |
cd2a8079 | 482 | curr_off += rec->fields[i].size + sz; |
cc487558 | 483 | } |
f71b2f64 KKD |
484 | memset(dst + curr_off, 0, size - curr_off); |
485 | } | |
486 | ||
487 | static inline void zero_map_value(struct bpf_map *map, void *dst) | |
488 | { | |
cd2a8079 | 489 | bpf_obj_memzero(map->record, dst, map->value_size); |
cc487558 KKD |
490 | } |
491 | ||
96049f3a AS |
492 | void copy_map_value_locked(struct bpf_map *map, void *dst, void *src, |
493 | bool lock_src); | |
b00628b1 | 494 | void bpf_timer_cancel_and_free(void *timer); |
f0c5941f KKD |
495 | void bpf_list_head_free(const struct btf_field *field, void *list_head, |
496 | struct bpf_spin_lock *spin_lock); | |
9c395c1b DM |
497 | void bpf_rb_root_free(const struct btf_field *field, void *rb_root, |
498 | struct bpf_spin_lock *spin_lock); | |
499 | ||
f0c5941f | 500 | |
8e7ae251 | 501 | int bpf_obj_name_cpy(char *dst, const char *src, unsigned int size); |
d83525ca | 502 | |
602144c2 | 503 | struct bpf_offload_dev; |
a3884572 JK |
504 | struct bpf_offloaded_map; |
505 | ||
506 | struct bpf_map_dev_ops { | |
507 | int (*map_get_next_key)(struct bpf_offloaded_map *map, | |
508 | void *key, void *next_key); | |
509 | int (*map_lookup_elem)(struct bpf_offloaded_map *map, | |
510 | void *key, void *value); | |
511 | int (*map_update_elem)(struct bpf_offloaded_map *map, | |
512 | void *key, void *value, u64 flags); | |
513 | int (*map_delete_elem)(struct bpf_offloaded_map *map, void *key); | |
514 | }; | |
515 | ||
516 | struct bpf_offloaded_map { | |
517 | struct bpf_map map; | |
518 | struct net_device *netdev; | |
519 | const struct bpf_map_dev_ops *dev_ops; | |
520 | void *dev_priv; | |
521 | struct list_head offloads; | |
522 | }; | |
523 | ||
524 | static inline struct bpf_offloaded_map *map_to_offmap(struct bpf_map *map) | |
525 | { | |
526 | return container_of(map, struct bpf_offloaded_map, map); | |
527 | } | |
528 | ||
0cd3cbed JK |
529 | static inline bool bpf_map_offload_neutral(const struct bpf_map *map) |
530 | { | |
531 | return map->map_type == BPF_MAP_TYPE_PERF_EVENT_ARRAY; | |
532 | } | |
533 | ||
a26ca7c9 MKL |
534 | static inline bool bpf_map_support_seq_show(const struct bpf_map *map) |
535 | { | |
85d33df3 MKL |
536 | return (map->btf_value_type_id || map->btf_vmlinux_value_type_id) && |
537 | map->ops->map_seq_show_elem; | |
a26ca7c9 MKL |
538 | } |
539 | ||
e8d2bec0 | 540 | int map_check_no_btf(const struct bpf_map *map, |
1b2b234b | 541 | const struct btf *btf, |
e8d2bec0 DB |
542 | const struct btf_type *key_type, |
543 | const struct btf_type *value_type); | |
544 | ||
f4d05259 MKL |
545 | bool bpf_map_meta_equal(const struct bpf_map *meta0, |
546 | const struct bpf_map *meta1); | |
547 | ||
a3884572 JK |
548 | extern const struct bpf_map_ops bpf_map_offload_ops; |
549 | ||
d639b9d1 HL |
550 | /* bpf_type_flag contains a set of flags that are applicable to the values of |
551 | * arg_type, ret_type and reg_type. For example, a pointer value may be null, | |
552 | * or a memory is read-only. We classify types into two categories: base types | |
553 | * and extended types. Extended types are base types combined with a type flag. | |
554 | * | |
555 | * Currently there are no more than 32 base types in arg_type, ret_type and | |
556 | * reg_types. | |
557 | */ | |
558 | #define BPF_BASE_TYPE_BITS 8 | |
559 | ||
560 | enum bpf_type_flag { | |
561 | /* PTR may be NULL. */ | |
562 | PTR_MAYBE_NULL = BIT(0 + BPF_BASE_TYPE_BITS), | |
563 | ||
216e3cd2 HL |
564 | /* MEM is read-only. When applied on bpf_arg, it indicates the arg is |
565 | * compatible with both mutable and immutable memory. | |
566 | */ | |
20b2aff4 HL |
567 | MEM_RDONLY = BIT(1 + BPF_BASE_TYPE_BITS), |
568 | ||
894f2a8b KKD |
569 | /* MEM points to BPF ring buffer reservation. */ |
570 | MEM_RINGBUF = BIT(2 + BPF_BASE_TYPE_BITS), | |
a672b2e3 | 571 | |
c6f1bfe8 YS |
572 | /* MEM is in user address space. */ |
573 | MEM_USER = BIT(3 + BPF_BASE_TYPE_BITS), | |
574 | ||
5844101a HL |
575 | /* MEM is a percpu memory. MEM_PERCPU tags PTR_TO_BTF_ID. When tagged |
576 | * with MEM_PERCPU, PTR_TO_BTF_ID _cannot_ be directly accessed. In | |
577 | * order to drop this tag, it must be passed into bpf_per_cpu_ptr() | |
578 | * or bpf_this_cpu_ptr(), which will return the pointer corresponding | |
579 | * to the specified cpu. | |
580 | */ | |
581 | MEM_PERCPU = BIT(4 + BPF_BASE_TYPE_BITS), | |
582 | ||
8f14852e KKD |
583 | /* Indicates that the argument will be released. */ |
584 | OBJ_RELEASE = BIT(5 + BPF_BASE_TYPE_BITS), | |
585 | ||
6efe152d KKD |
586 | /* PTR is not trusted. This is only used with PTR_TO_BTF_ID, to mark |
587 | * unreferenced and referenced kptr loaded from map value using a load | |
588 | * instruction, so that they can only be dereferenced but not escape the | |
589 | * BPF program into the kernel (i.e. cannot be passed as arguments to | |
590 | * kfunc or bpf helpers). | |
591 | */ | |
592 | PTR_UNTRUSTED = BIT(6 + BPF_BASE_TYPE_BITS), | |
593 | ||
16d1e00c JK |
594 | MEM_UNINIT = BIT(7 + BPF_BASE_TYPE_BITS), |
595 | ||
97e03f52 JK |
596 | /* DYNPTR points to memory local to the bpf program. */ |
597 | DYNPTR_TYPE_LOCAL = BIT(8 + BPF_BASE_TYPE_BITS), | |
598 | ||
20571567 | 599 | /* DYNPTR points to a kernel-produced ringbuf record. */ |
bc34dee6 JK |
600 | DYNPTR_TYPE_RINGBUF = BIT(9 + BPF_BASE_TYPE_BITS), |
601 | ||
508362ac MM |
602 | /* Size is known at compile time. */ |
603 | MEM_FIXED_SIZE = BIT(10 + BPF_BASE_TYPE_BITS), | |
604 | ||
282de143 KKD |
605 | /* MEM is of an allocated object of type in program BTF. This is used to |
606 | * tag PTR_TO_BTF_ID allocated using bpf_obj_new. | |
607 | */ | |
608 | MEM_ALLOC = BIT(11 + BPF_BASE_TYPE_BITS), | |
609 | ||
3f00c523 DV |
610 | /* PTR was passed from the kernel in a trusted context, and may be |
611 | * passed to KF_TRUSTED_ARGS kfuncs or BPF helper functions. | |
612 | * Confusingly, this is _not_ the opposite of PTR_UNTRUSTED above. | |
613 | * PTR_UNTRUSTED refers to a kptr that was read directly from a map | |
614 | * without invoking bpf_kptr_xchg(). What we really need to know is | |
615 | * whether a pointer is safe to pass to a kfunc or BPF helper function. | |
616 | * While PTR_UNTRUSTED pointers are unsafe to pass to kfuncs and BPF | |
617 | * helpers, they do not cover all possible instances of unsafe | |
618 | * pointers. For example, a pointer that was obtained from walking a | |
619 | * struct will _not_ get the PTR_UNTRUSTED type modifier, despite the | |
620 | * fact that it may be NULL, invalid, etc. This is due to backwards | |
621 | * compatibility requirements, as this was the behavior that was first | |
622 | * introduced when kptrs were added. The behavior is now considered | |
623 | * deprecated, and PTR_UNTRUSTED will eventually be removed. | |
624 | * | |
625 | * PTR_TRUSTED, on the other hand, is a pointer that the kernel | |
626 | * guarantees to be valid and safe to pass to kfuncs and BPF helpers. | |
627 | * For example, pointers passed to tracepoint arguments are considered | |
628 | * PTR_TRUSTED, as are pointers that are passed to struct_ops | |
629 | * callbacks. As alluded to above, pointers that are obtained from | |
630 | * walking PTR_TRUSTED pointers are _not_ trusted. For example, if a | |
631 | * struct task_struct *task is PTR_TRUSTED, then accessing | |
632 | * task->last_wakee will lose the PTR_TRUSTED modifier when it's stored | |
633 | * in a BPF register. Similarly, pointers passed to certain programs | |
634 | * types such as kretprobes are not guaranteed to be valid, as they may | |
635 | * for example contain an object that was recently freed. | |
636 | */ | |
637 | PTR_TRUSTED = BIT(12 + BPF_BASE_TYPE_BITS), | |
638 | ||
9bb00b28 YS |
639 | /* MEM is tagged with rcu and memory access needs rcu_read_lock protection. */ |
640 | MEM_RCU = BIT(13 + BPF_BASE_TYPE_BITS), | |
641 | ||
6a3cd331 DM |
642 | /* Used to tag PTR_TO_BTF_ID | MEM_ALLOC references which are non-owning. |
643 | * Currently only valid for linked-list and rbtree nodes. | |
644 | */ | |
645 | NON_OWN_REF = BIT(14 + BPF_BASE_TYPE_BITS), | |
646 | ||
b5964b96 JK |
647 | /* DYNPTR points to sk_buff */ |
648 | DYNPTR_TYPE_SKB = BIT(15 + BPF_BASE_TYPE_BITS), | |
649 | ||
05421aec JK |
650 | /* DYNPTR points to xdp_buff */ |
651 | DYNPTR_TYPE_XDP = BIT(16 + BPF_BASE_TYPE_BITS), | |
652 | ||
16d1e00c JK |
653 | __BPF_TYPE_FLAG_MAX, |
654 | __BPF_TYPE_LAST_FLAG = __BPF_TYPE_FLAG_MAX - 1, | |
d639b9d1 HL |
655 | }; |
656 | ||
05421aec JK |
657 | #define DYNPTR_TYPE_FLAG_MASK (DYNPTR_TYPE_LOCAL | DYNPTR_TYPE_RINGBUF | DYNPTR_TYPE_SKB \ |
658 | | DYNPTR_TYPE_XDP) | |
97e03f52 | 659 | |
d639b9d1 HL |
660 | /* Max number of base types. */ |
661 | #define BPF_BASE_TYPE_LIMIT (1UL << BPF_BASE_TYPE_BITS) | |
662 | ||
663 | /* Max number of all types. */ | |
664 | #define BPF_TYPE_LIMIT (__BPF_TYPE_LAST_FLAG | (__BPF_TYPE_LAST_FLAG - 1)) | |
665 | ||
17a52670 AS |
666 | /* function argument constraints */ |
667 | enum bpf_arg_type { | |
80f1d68c | 668 | ARG_DONTCARE = 0, /* unused argument in helper function */ |
17a52670 AS |
669 | |
670 | /* the following constraints used to prototype | |
671 | * bpf_map_lookup/update/delete_elem() functions | |
672 | */ | |
673 | ARG_CONST_MAP_PTR, /* const argument used as pointer to bpf_map */ | |
674 | ARG_PTR_TO_MAP_KEY, /* pointer to stack used as map key */ | |
675 | ARG_PTR_TO_MAP_VALUE, /* pointer to stack used as map value */ | |
676 | ||
16d1e00c JK |
677 | /* Used to prototype bpf_memcmp() and other functions that access data |
678 | * on eBPF program stack | |
17a52670 | 679 | */ |
39f19ebb | 680 | ARG_PTR_TO_MEM, /* pointer to valid memory (stack, packet, map value) */ |
435faee1 | 681 | |
39f19ebb AS |
682 | ARG_CONST_SIZE, /* number of bytes accessed from memory */ |
683 | ARG_CONST_SIZE_OR_ZERO, /* number of bytes accessed from memory or 0 */ | |
80f1d68c | 684 | |
608cd71a | 685 | ARG_PTR_TO_CTX, /* pointer to context */ |
80f1d68c | 686 | ARG_ANYTHING, /* any (initialized) argument is ok */ |
d83525ca | 687 | ARG_PTR_TO_SPIN_LOCK, /* pointer to bpf_spin_lock */ |
46f8bc92 | 688 | ARG_PTR_TO_SOCK_COMMON, /* pointer to sock_common */ |
57c3bb72 AI |
689 | ARG_PTR_TO_INT, /* pointer to int */ |
690 | ARG_PTR_TO_LONG, /* pointer to long */ | |
6ac99e8f | 691 | ARG_PTR_TO_SOCKET, /* pointer to bpf_sock (fullsock) */ |
a7658e1a | 692 | ARG_PTR_TO_BTF_ID, /* pointer to in-kernel struct */ |
894f2a8b | 693 | ARG_PTR_TO_RINGBUF_MEM, /* pointer to dynamically reserved ringbuf memory */ |
457f4436 | 694 | ARG_CONST_ALLOC_SIZE_OR_ZERO, /* number of allocated bytes requested */ |
1df8f55a | 695 | ARG_PTR_TO_BTF_ID_SOCK_COMMON, /* pointer to in-kernel sock_common or bpf-mirrored bpf_sock */ |
eaa6bcb7 | 696 | ARG_PTR_TO_PERCPU_BTF_ID, /* pointer to in-kernel percpu type */ |
69c087ba | 697 | ARG_PTR_TO_FUNC, /* pointer to a bpf program function */ |
48946bd6 | 698 | ARG_PTR_TO_STACK, /* pointer to stack */ |
fff13c4b | 699 | ARG_PTR_TO_CONST_STR, /* pointer to a null terminated read-only string */ |
b00628b1 | 700 | ARG_PTR_TO_TIMER, /* pointer to bpf_timer */ |
c0a5a21c | 701 | ARG_PTR_TO_KPTR, /* pointer to referenced kptr */ |
97e03f52 | 702 | ARG_PTR_TO_DYNPTR, /* pointer to bpf_dynptr. See bpf_type_flag for dynptr type */ |
f79e7ea5 | 703 | __BPF_ARG_TYPE_MAX, |
d639b9d1 | 704 | |
48946bd6 HL |
705 | /* Extended arg_types. */ |
706 | ARG_PTR_TO_MAP_VALUE_OR_NULL = PTR_MAYBE_NULL | ARG_PTR_TO_MAP_VALUE, | |
707 | ARG_PTR_TO_MEM_OR_NULL = PTR_MAYBE_NULL | ARG_PTR_TO_MEM, | |
708 | ARG_PTR_TO_CTX_OR_NULL = PTR_MAYBE_NULL | ARG_PTR_TO_CTX, | |
709 | ARG_PTR_TO_SOCKET_OR_NULL = PTR_MAYBE_NULL | ARG_PTR_TO_SOCKET, | |
48946bd6 | 710 | ARG_PTR_TO_STACK_OR_NULL = PTR_MAYBE_NULL | ARG_PTR_TO_STACK, |
c0a5a21c | 711 | ARG_PTR_TO_BTF_ID_OR_NULL = PTR_MAYBE_NULL | ARG_PTR_TO_BTF_ID, |
16d1e00c JK |
712 | /* pointer to memory does not need to be initialized, helper function must fill |
713 | * all bytes or clear them in error case. | |
714 | */ | |
715 | ARG_PTR_TO_UNINIT_MEM = MEM_UNINIT | ARG_PTR_TO_MEM, | |
508362ac MM |
716 | /* Pointer to valid memory of size known at compile time. */ |
717 | ARG_PTR_TO_FIXED_SIZE_MEM = MEM_FIXED_SIZE | ARG_PTR_TO_MEM, | |
48946bd6 | 718 | |
d639b9d1 HL |
719 | /* This must be the last entry. Its purpose is to ensure the enum is |
720 | * wide enough to hold the higher bits reserved for bpf_type_flag. | |
721 | */ | |
722 | __BPF_ARG_TYPE_LIMIT = BPF_TYPE_LIMIT, | |
17a52670 | 723 | }; |
d639b9d1 | 724 | static_assert(__BPF_ARG_TYPE_MAX <= BPF_BASE_TYPE_LIMIT); |
17a52670 AS |
725 | |
726 | /* type of values returned from helper functions */ | |
727 | enum bpf_return_type { | |
728 | RET_INTEGER, /* function returns integer */ | |
729 | RET_VOID, /* function doesn't return anything */ | |
3e6a4b3e | 730 | RET_PTR_TO_MAP_VALUE, /* returns a pointer to map elem value */ |
3c480732 HL |
731 | RET_PTR_TO_SOCKET, /* returns a pointer to a socket */ |
732 | RET_PTR_TO_TCP_SOCK, /* returns a pointer to a tcp_sock */ | |
733 | RET_PTR_TO_SOCK_COMMON, /* returns a pointer to a sock_common */ | |
2de2669b | 734 | RET_PTR_TO_MEM, /* returns a pointer to memory */ |
63d9b80d | 735 | RET_PTR_TO_MEM_OR_BTF_ID, /* returns a pointer to a valid memory or a btf_id */ |
3ca1032a | 736 | RET_PTR_TO_BTF_ID, /* returns a pointer to a btf_id */ |
d639b9d1 HL |
737 | __BPF_RET_TYPE_MAX, |
738 | ||
3c480732 HL |
739 | /* Extended ret_types. */ |
740 | RET_PTR_TO_MAP_VALUE_OR_NULL = PTR_MAYBE_NULL | RET_PTR_TO_MAP_VALUE, | |
741 | RET_PTR_TO_SOCKET_OR_NULL = PTR_MAYBE_NULL | RET_PTR_TO_SOCKET, | |
742 | RET_PTR_TO_TCP_SOCK_OR_NULL = PTR_MAYBE_NULL | RET_PTR_TO_TCP_SOCK, | |
743 | RET_PTR_TO_SOCK_COMMON_OR_NULL = PTR_MAYBE_NULL | RET_PTR_TO_SOCK_COMMON, | |
894f2a8b | 744 | RET_PTR_TO_RINGBUF_MEM_OR_NULL = PTR_MAYBE_NULL | MEM_RINGBUF | RET_PTR_TO_MEM, |
2de2669b | 745 | RET_PTR_TO_DYNPTR_MEM_OR_NULL = PTR_MAYBE_NULL | RET_PTR_TO_MEM, |
3c480732 | 746 | RET_PTR_TO_BTF_ID_OR_NULL = PTR_MAYBE_NULL | RET_PTR_TO_BTF_ID, |
3f00c523 | 747 | RET_PTR_TO_BTF_ID_TRUSTED = PTR_TRUSTED | RET_PTR_TO_BTF_ID, |
3c480732 | 748 | |
d639b9d1 HL |
749 | /* This must be the last entry. Its purpose is to ensure the enum is |
750 | * wide enough to hold the higher bits reserved for bpf_type_flag. | |
751 | */ | |
752 | __BPF_RET_TYPE_LIMIT = BPF_TYPE_LIMIT, | |
17a52670 | 753 | }; |
d639b9d1 | 754 | static_assert(__BPF_RET_TYPE_MAX <= BPF_BASE_TYPE_LIMIT); |
17a52670 | 755 | |
09756af4 AS |
756 | /* eBPF function prototype used by verifier to allow BPF_CALLs from eBPF programs |
757 | * to in-kernel helper functions and for adjusting imm32 field in BPF_CALL | |
758 | * instructions after verifying | |
759 | */ | |
760 | struct bpf_func_proto { | |
761 | u64 (*func)(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5); | |
762 | bool gpl_only; | |
36bbef52 | 763 | bool pkt_access; |
01685c5b | 764 | bool might_sleep; |
17a52670 | 765 | enum bpf_return_type ret_type; |
a7658e1a AS |
766 | union { |
767 | struct { | |
768 | enum bpf_arg_type arg1_type; | |
769 | enum bpf_arg_type arg2_type; | |
770 | enum bpf_arg_type arg3_type; | |
771 | enum bpf_arg_type arg4_type; | |
772 | enum bpf_arg_type arg5_type; | |
773 | }; | |
774 | enum bpf_arg_type arg_type[5]; | |
775 | }; | |
9436ef6e LB |
776 | union { |
777 | struct { | |
778 | u32 *arg1_btf_id; | |
779 | u32 *arg2_btf_id; | |
780 | u32 *arg3_btf_id; | |
781 | u32 *arg4_btf_id; | |
782 | u32 *arg5_btf_id; | |
783 | }; | |
784 | u32 *arg_btf_id[5]; | |
508362ac MM |
785 | struct { |
786 | size_t arg1_size; | |
787 | size_t arg2_size; | |
788 | size_t arg3_size; | |
789 | size_t arg4_size; | |
790 | size_t arg5_size; | |
791 | }; | |
792 | size_t arg_size[5]; | |
9436ef6e | 793 | }; |
af7ec138 | 794 | int *ret_btf_id; /* return value btf_id */ |
eae2e83e | 795 | bool (*allowed)(const struct bpf_prog *prog); |
17a52670 AS |
796 | }; |
797 | ||
798 | /* bpf_context is intentionally undefined structure. Pointer to bpf_context is | |
799 | * the first argument to eBPF programs. | |
800 | * For socket filters: 'struct bpf_context *' == 'struct sk_buff *' | |
801 | */ | |
802 | struct bpf_context; | |
803 | ||
804 | enum bpf_access_type { | |
805 | BPF_READ = 1, | |
806 | BPF_WRITE = 2 | |
09756af4 AS |
807 | }; |
808 | ||
19de99f7 | 809 | /* types of values stored in eBPF registers */ |
f1174f77 EC |
810 | /* Pointer types represent: |
811 | * pointer | |
812 | * pointer + imm | |
813 | * pointer + (u16) var | |
814 | * pointer + (u16) var + imm | |
815 | * if (range > 0) then [ptr, ptr + range - off) is safe to access | |
816 | * if (id > 0) means that some 'var' was added | |
817 | * if (off > 0) means that 'imm' was added | |
818 | */ | |
19de99f7 AS |
819 | enum bpf_reg_type { |
820 | NOT_INIT = 0, /* nothing was written into register */ | |
f1174f77 | 821 | SCALAR_VALUE, /* reg doesn't contain a valid pointer */ |
19de99f7 AS |
822 | PTR_TO_CTX, /* reg points to bpf_context */ |
823 | CONST_PTR_TO_MAP, /* reg points to struct bpf_map */ | |
824 | PTR_TO_MAP_VALUE, /* reg points to map element value */ | |
c25b2ae1 | 825 | PTR_TO_MAP_KEY, /* reg points to a map element key */ |
f1174f77 | 826 | PTR_TO_STACK, /* reg == frame_pointer + offset */ |
de8f3a83 | 827 | PTR_TO_PACKET_META, /* skb->data - meta_len */ |
f1174f77 | 828 | PTR_TO_PACKET, /* reg points to skb->data */ |
19de99f7 | 829 | PTR_TO_PACKET_END, /* skb->data + headlen */ |
d58e468b | 830 | PTR_TO_FLOW_KEYS, /* reg points to bpf_flow_keys */ |
c64b7983 | 831 | PTR_TO_SOCKET, /* reg points to struct bpf_sock */ |
46f8bc92 | 832 | PTR_TO_SOCK_COMMON, /* reg points to sock_common */ |
655a51e5 | 833 | PTR_TO_TCP_SOCK, /* reg points to struct tcp_sock */ |
9df1c28b | 834 | PTR_TO_TP_BUFFER, /* reg points to a writable raw tp's buffer */ |
fada7fdc | 835 | PTR_TO_XDP_SOCK, /* reg points to struct xdp_sock */ |
ba5f4cfe JF |
836 | /* PTR_TO_BTF_ID points to a kernel struct that does not need |
837 | * to be null checked by the BPF program. This does not imply the | |
838 | * pointer is _not_ null and in practice this can easily be a null | |
839 | * pointer when reading pointer chains. The assumption is program | |
840 | * context will handle null pointer dereference typically via fault | |
841 | * handling. The verifier must keep this in mind and can make no | |
842 | * assumptions about null or non-null when doing branch analysis. | |
843 | * Further, when passed into helpers the helpers can not, without | |
844 | * additional context, assume the value is non-null. | |
845 | */ | |
846 | PTR_TO_BTF_ID, | |
847 | /* PTR_TO_BTF_ID_OR_NULL points to a kernel struct that has not | |
848 | * been checked for null. Used primarily to inform the verifier | |
849 | * an explicit null check is required for this struct. | |
850 | */ | |
457f4436 | 851 | PTR_TO_MEM, /* reg points to valid memory region */ |
20b2aff4 | 852 | PTR_TO_BUF, /* reg points to a read/write buffer */ |
69c087ba | 853 | PTR_TO_FUNC, /* reg points to a bpf program function */ |
27060531 | 854 | CONST_PTR_TO_DYNPTR, /* reg points to a const struct bpf_dynptr */ |
e6ac2450 | 855 | __BPF_REG_TYPE_MAX, |
d639b9d1 | 856 | |
c25b2ae1 HL |
857 | /* Extended reg_types. */ |
858 | PTR_TO_MAP_VALUE_OR_NULL = PTR_MAYBE_NULL | PTR_TO_MAP_VALUE, | |
859 | PTR_TO_SOCKET_OR_NULL = PTR_MAYBE_NULL | PTR_TO_SOCKET, | |
860 | PTR_TO_SOCK_COMMON_OR_NULL = PTR_MAYBE_NULL | PTR_TO_SOCK_COMMON, | |
861 | PTR_TO_TCP_SOCK_OR_NULL = PTR_MAYBE_NULL | PTR_TO_TCP_SOCK, | |
862 | PTR_TO_BTF_ID_OR_NULL = PTR_MAYBE_NULL | PTR_TO_BTF_ID, | |
c25b2ae1 | 863 | |
d639b9d1 HL |
864 | /* This must be the last entry. Its purpose is to ensure the enum is |
865 | * wide enough to hold the higher bits reserved for bpf_type_flag. | |
866 | */ | |
867 | __BPF_REG_TYPE_LIMIT = BPF_TYPE_LIMIT, | |
19de99f7 | 868 | }; |
d639b9d1 | 869 | static_assert(__BPF_REG_TYPE_MAX <= BPF_BASE_TYPE_LIMIT); |
19de99f7 | 870 | |
23994631 YS |
871 | /* The information passed from prog-specific *_is_valid_access |
872 | * back to the verifier. | |
873 | */ | |
874 | struct bpf_insn_access_aux { | |
875 | enum bpf_reg_type reg_type; | |
9e15db66 AS |
876 | union { |
877 | int ctx_field_size; | |
22dc4a0f AN |
878 | struct { |
879 | struct btf *btf; | |
880 | u32 btf_id; | |
881 | }; | |
9e15db66 AS |
882 | }; |
883 | struct bpf_verifier_log *log; /* for verbose logs */ | |
23994631 YS |
884 | }; |
885 | ||
f96da094 DB |
886 | static inline void |
887 | bpf_ctx_record_field_size(struct bpf_insn_access_aux *aux, u32 size) | |
888 | { | |
889 | aux->ctx_field_size = size; | |
890 | } | |
891 | ||
3990ed4c MKL |
892 | static inline bool bpf_pseudo_func(const struct bpf_insn *insn) |
893 | { | |
894 | return insn->code == (BPF_LD | BPF_IMM | BPF_DW) && | |
895 | insn->src_reg == BPF_PSEUDO_FUNC; | |
896 | } | |
897 | ||
7de16e3a JK |
898 | struct bpf_prog_ops { |
899 | int (*test_run)(struct bpf_prog *prog, const union bpf_attr *kattr, | |
900 | union bpf_attr __user *uattr); | |
901 | }; | |
902 | ||
6728aea7 | 903 | struct bpf_reg_state; |
09756af4 AS |
904 | struct bpf_verifier_ops { |
905 | /* return eBPF function prototype for verification */ | |
5e43f899 AI |
906 | const struct bpf_func_proto * |
907 | (*get_func_proto)(enum bpf_func_id func_id, | |
908 | const struct bpf_prog *prog); | |
17a52670 AS |
909 | |
910 | /* return true if 'size' wide access at offset 'off' within bpf_context | |
911 | * with 'type' (read or write) is allowed | |
912 | */ | |
19de99f7 | 913 | bool (*is_valid_access)(int off, int size, enum bpf_access_type type, |
5e43f899 | 914 | const struct bpf_prog *prog, |
23994631 | 915 | struct bpf_insn_access_aux *info); |
36bbef52 DB |
916 | int (*gen_prologue)(struct bpf_insn *insn, bool direct_write, |
917 | const struct bpf_prog *prog); | |
e0cea7ce DB |
918 | int (*gen_ld_abs)(const struct bpf_insn *orig, |
919 | struct bpf_insn *insn_buf); | |
6b8cc1d1 DB |
920 | u32 (*convert_ctx_access)(enum bpf_access_type type, |
921 | const struct bpf_insn *src, | |
922 | struct bpf_insn *dst, | |
f96da094 | 923 | struct bpf_prog *prog, u32 *target_size); |
27ae7997 | 924 | int (*btf_struct_access)(struct bpf_verifier_log *log, |
6728aea7 | 925 | const struct bpf_reg_state *reg, |
b7e852a9 | 926 | int off, int size); |
09756af4 AS |
927 | }; |
928 | ||
cae1927c | 929 | struct bpf_prog_offload_ops { |
08ca90af | 930 | /* verifier basic callbacks */ |
cae1927c JK |
931 | int (*insn_hook)(struct bpf_verifier_env *env, |
932 | int insn_idx, int prev_insn_idx); | |
c941ce9c | 933 | int (*finalize)(struct bpf_verifier_env *env); |
08ca90af JK |
934 | /* verifier optimization callbacks (called after .finalize) */ |
935 | int (*replace_insn)(struct bpf_verifier_env *env, u32 off, | |
936 | struct bpf_insn *insn); | |
937 | int (*remove_insns)(struct bpf_verifier_env *env, u32 off, u32 cnt); | |
938 | /* program management callbacks */ | |
16a8cb5c QM |
939 | int (*prepare)(struct bpf_prog *prog); |
940 | int (*translate)(struct bpf_prog *prog); | |
eb911947 | 941 | void (*destroy)(struct bpf_prog *prog); |
cae1927c JK |
942 | }; |
943 | ||
0a9c1991 | 944 | struct bpf_prog_offload { |
ab3f0063 JK |
945 | struct bpf_prog *prog; |
946 | struct net_device *netdev; | |
341b3e7b | 947 | struct bpf_offload_dev *offdev; |
ab3f0063 JK |
948 | void *dev_priv; |
949 | struct list_head offloads; | |
950 | bool dev_state; | |
08ca90af | 951 | bool opt_failed; |
fcfb126d JW |
952 | void *jited_image; |
953 | u32 jited_len; | |
ab3f0063 JK |
954 | }; |
955 | ||
8bad74f9 RG |
956 | enum bpf_cgroup_storage_type { |
957 | BPF_CGROUP_STORAGE_SHARED, | |
b741f163 | 958 | BPF_CGROUP_STORAGE_PERCPU, |
8bad74f9 RG |
959 | __BPF_CGROUP_STORAGE_MAX |
960 | }; | |
961 | ||
962 | #define MAX_BPF_CGROUP_STORAGE_TYPE __BPF_CGROUP_STORAGE_MAX | |
963 | ||
f1b9509c AS |
964 | /* The longest tracepoint has 12 args. |
965 | * See include/trace/bpf_probe.h | |
966 | */ | |
967 | #define MAX_BPF_FUNC_ARGS 12 | |
968 | ||
523a4cf4 DB |
969 | /* The maximum number of arguments passed through registers |
970 | * a single function may have. | |
971 | */ | |
972 | #define MAX_BPF_FUNC_REG_ARGS 5 | |
973 | ||
720e6a43 YS |
974 | /* The argument is a structure. */ |
975 | #define BTF_FMODEL_STRUCT_ARG BIT(0) | |
976 | ||
49f67f39 IL |
977 | /* The argument is signed. */ |
978 | #define BTF_FMODEL_SIGNED_ARG BIT(1) | |
979 | ||
fec56f58 AS |
980 | struct btf_func_model { |
981 | u8 ret_size; | |
49f67f39 | 982 | u8 ret_flags; |
fec56f58 AS |
983 | u8 nr_args; |
984 | u8 arg_size[MAX_BPF_FUNC_ARGS]; | |
720e6a43 | 985 | u8 arg_flags[MAX_BPF_FUNC_ARGS]; |
fec56f58 AS |
986 | }; |
987 | ||
988 | /* Restore arguments before returning from trampoline to let original function | |
989 | * continue executing. This flag is used for fentry progs when there are no | |
990 | * fexit progs. | |
991 | */ | |
992 | #define BPF_TRAMP_F_RESTORE_REGS BIT(0) | |
993 | /* Call original function after fentry progs, but before fexit progs. | |
994 | * Makes sense for fentry/fexit, normal calls and indirect calls. | |
995 | */ | |
996 | #define BPF_TRAMP_F_CALL_ORIG BIT(1) | |
997 | /* Skip current frame and return to parent. Makes sense for fentry/fexit | |
998 | * programs only. Should not be used with normal calls and indirect calls. | |
999 | */ | |
1000 | #define BPF_TRAMP_F_SKIP_FRAME BIT(2) | |
7e6f3cd8 JO |
1001 | /* Store IP address of the caller on the trampoline stack, |
1002 | * so it's available for trampoline's programs. | |
1003 | */ | |
1004 | #define BPF_TRAMP_F_IP_ARG BIT(3) | |
356ed649 HT |
1005 | /* Return the return value of fentry prog. Only used by bpf_struct_ops. */ |
1006 | #define BPF_TRAMP_F_RET_FENTRY_RET BIT(4) | |
7e6f3cd8 | 1007 | |
316cba62 JO |
1008 | /* Get original function from stack instead of from provided direct address. |
1009 | * Makes sense for trampolines with fexit or fmod_ret programs. | |
1010 | */ | |
1011 | #define BPF_TRAMP_F_ORIG_STACK BIT(5) | |
1012 | ||
00963a2e SL |
1013 | /* This trampoline is on a function with another ftrace_ops with IPMODIFY, |
1014 | * e.g., a live patch. This flag is set and cleared by ftrace call backs, | |
1015 | */ | |
1016 | #define BPF_TRAMP_F_SHARE_IPMODIFY BIT(6) | |
1017 | ||
88fd9e53 | 1018 | /* Each call __bpf_prog_enter + call bpf_func + call __bpf_prog_exit is ~50 |
b23316aa | 1019 | * bytes on x86. |
88fd9e53 | 1020 | */ |
390a07a9 | 1021 | enum { |
528eb2cb IL |
1022 | #if defined(__s390x__) |
1023 | BPF_MAX_TRAMP_LINKS = 27, | |
1024 | #else | |
390a07a9 | 1025 | BPF_MAX_TRAMP_LINKS = 38, |
528eb2cb | 1026 | #endif |
390a07a9 | 1027 | }; |
88fd9e53 | 1028 | |
f7e0beaf KFL |
1029 | struct bpf_tramp_links { |
1030 | struct bpf_tramp_link *links[BPF_MAX_TRAMP_LINKS]; | |
1031 | int nr_links; | |
88fd9e53 KS |
1032 | }; |
1033 | ||
e384c7b7 KFL |
1034 | struct bpf_tramp_run_ctx; |
1035 | ||
fec56f58 AS |
1036 | /* Different use cases for BPF trampoline: |
1037 | * 1. replace nop at the function entry (kprobe equivalent) | |
1038 | * flags = BPF_TRAMP_F_RESTORE_REGS | |
1039 | * fentry = a set of programs to run before returning from trampoline | |
1040 | * | |
1041 | * 2. replace nop at the function entry (kprobe + kretprobe equivalent) | |
1042 | * flags = BPF_TRAMP_F_CALL_ORIG | BPF_TRAMP_F_SKIP_FRAME | |
1043 | * orig_call = fentry_ip + MCOUNT_INSN_SIZE | |
1044 | * fentry = a set of program to run before calling original function | |
1045 | * fexit = a set of program to run after original function | |
1046 | * | |
1047 | * 3. replace direct call instruction anywhere in the function body | |
1048 | * or assign a function pointer for indirect call (like tcp_congestion_ops->cong_avoid) | |
1049 | * With flags = 0 | |
1050 | * fentry = a set of programs to run before returning from trampoline | |
1051 | * With flags = BPF_TRAMP_F_CALL_ORIG | |
1052 | * orig_call = original callback addr or direct function addr | |
1053 | * fentry = a set of program to run before calling original function | |
1054 | * fexit = a set of program to run after original function | |
1055 | */ | |
e21aa341 AS |
1056 | struct bpf_tramp_image; |
1057 | int arch_prepare_bpf_trampoline(struct bpf_tramp_image *tr, void *image, void *image_end, | |
85d33df3 | 1058 | const struct btf_func_model *m, u32 flags, |
f7e0beaf | 1059 | struct bpf_tramp_links *tlinks, |
fec56f58 | 1060 | void *orig_call); |
271de525 MKL |
1061 | u64 notrace __bpf_prog_enter_sleepable_recur(struct bpf_prog *prog, |
1062 | struct bpf_tramp_run_ctx *run_ctx); | |
1063 | void notrace __bpf_prog_exit_sleepable_recur(struct bpf_prog *prog, u64 start, | |
1064 | struct bpf_tramp_run_ctx *run_ctx); | |
e21aa341 AS |
1065 | void notrace __bpf_tramp_enter(struct bpf_tramp_image *tr); |
1066 | void notrace __bpf_tramp_exit(struct bpf_tramp_image *tr); | |
271de525 MKL |
1067 | typedef u64 (*bpf_trampoline_enter_t)(struct bpf_prog *prog, |
1068 | struct bpf_tramp_run_ctx *run_ctx); | |
1069 | typedef void (*bpf_trampoline_exit_t)(struct bpf_prog *prog, u64 start, | |
1070 | struct bpf_tramp_run_ctx *run_ctx); | |
1071 | bpf_trampoline_enter_t bpf_trampoline_enter(const struct bpf_prog *prog); | |
1072 | bpf_trampoline_exit_t bpf_trampoline_exit(const struct bpf_prog *prog); | |
fec56f58 | 1073 | |
535911c8 JO |
1074 | struct bpf_ksym { |
1075 | unsigned long start; | |
1076 | unsigned long end; | |
bfea9a85 | 1077 | char name[KSYM_NAME_LEN]; |
ecb60d1c | 1078 | struct list_head lnode; |
ca4424c9 | 1079 | struct latch_tree_node tnode; |
cbd76f8d | 1080 | bool prog; |
535911c8 JO |
1081 | }; |
1082 | ||
fec56f58 AS |
1083 | enum bpf_tramp_prog_type { |
1084 | BPF_TRAMP_FENTRY, | |
1085 | BPF_TRAMP_FEXIT, | |
ae240823 | 1086 | BPF_TRAMP_MODIFY_RETURN, |
be8704ff AS |
1087 | BPF_TRAMP_MAX, |
1088 | BPF_TRAMP_REPLACE, /* more than MAX */ | |
fec56f58 AS |
1089 | }; |
1090 | ||
e21aa341 AS |
1091 | struct bpf_tramp_image { |
1092 | void *image; | |
1093 | struct bpf_ksym ksym; | |
1094 | struct percpu_ref pcref; | |
1095 | void *ip_after_call; | |
1096 | void *ip_epilogue; | |
1097 | union { | |
1098 | struct rcu_head rcu; | |
1099 | struct work_struct work; | |
1100 | }; | |
1101 | }; | |
1102 | ||
fec56f58 AS |
1103 | struct bpf_trampoline { |
1104 | /* hlist for trampoline_table */ | |
1105 | struct hlist_node hlist; | |
00963a2e | 1106 | struct ftrace_ops *fops; |
fec56f58 AS |
1107 | /* serializes access to fields of this trampoline */ |
1108 | struct mutex mutex; | |
1109 | refcount_t refcnt; | |
00963a2e | 1110 | u32 flags; |
fec56f58 AS |
1111 | u64 key; |
1112 | struct { | |
1113 | struct btf_func_model model; | |
1114 | void *addr; | |
b91e014f | 1115 | bool ftrace_managed; |
fec56f58 | 1116 | } func; |
be8704ff AS |
1117 | /* if !NULL this is BPF_PROG_TYPE_EXT program that extends another BPF |
1118 | * program by replacing one of its functions. func.addr is the address | |
1119 | * of the function it replaced. | |
1120 | */ | |
1121 | struct bpf_prog *extension_prog; | |
fec56f58 AS |
1122 | /* list of BPF programs using this trampoline */ |
1123 | struct hlist_head progs_hlist[BPF_TRAMP_MAX]; | |
1124 | /* Number of attached programs. A counter per kind. */ | |
1125 | int progs_cnt[BPF_TRAMP_MAX]; | |
1126 | /* Executable image of trampoline */ | |
e21aa341 | 1127 | struct bpf_tramp_image *cur_image; |
fec56f58 | 1128 | u64 selector; |
861de02e | 1129 | struct module *mod; |
fec56f58 | 1130 | }; |
75ccbef6 | 1131 | |
f7b12b6f THJ |
1132 | struct bpf_attach_target_info { |
1133 | struct btf_func_model fmodel; | |
1134 | long tgt_addr; | |
31bf1dbc | 1135 | struct module *tgt_mod; |
f7b12b6f THJ |
1136 | const char *tgt_name; |
1137 | const struct btf_type *tgt_type; | |
1138 | }; | |
1139 | ||
116eb788 | 1140 | #define BPF_DISPATCHER_MAX 48 /* Fits in 2048B */ |
75ccbef6 BT |
1141 | |
1142 | struct bpf_dispatcher_prog { | |
1143 | struct bpf_prog *prog; | |
1144 | refcount_t users; | |
1145 | }; | |
1146 | ||
1147 | struct bpf_dispatcher { | |
1148 | /* dispatcher mutex */ | |
1149 | struct mutex mutex; | |
1150 | void *func; | |
1151 | struct bpf_dispatcher_prog progs[BPF_DISPATCHER_MAX]; | |
1152 | int num_progs; | |
1153 | void *image; | |
19c02415 | 1154 | void *rw_image; |
75ccbef6 | 1155 | u32 image_off; |
517b75e4 | 1156 | struct bpf_ksym ksym; |
c86df29d PZ |
1157 | #ifdef CONFIG_HAVE_STATIC_CALL |
1158 | struct static_call_key *sc_key; | |
1159 | void *sc_tramp; | |
1160 | #endif | |
75ccbef6 BT |
1161 | }; |
1162 | ||
9f5b4009 | 1163 | static __always_inline __nocfi unsigned int bpf_dispatcher_nop_func( |
7e6897f9 BT |
1164 | const void *ctx, |
1165 | const struct bpf_insn *insnsi, | |
af3f4134 | 1166 | bpf_func_t bpf_func) |
7e6897f9 BT |
1167 | { |
1168 | return bpf_func(ctx, insnsi); | |
1169 | } | |
f7e0beaf | 1170 | |
8357b366 JK |
1171 | /* the implementation of the opaque uapi struct bpf_dynptr */ |
1172 | struct bpf_dynptr_kern { | |
1173 | void *data; | |
1174 | /* Size represents the number of usable bytes of dynptr data. | |
1175 | * If for example the offset is at 4 for a local dynptr whose data is | |
1176 | * of type u64, the number of usable bytes is 4. | |
1177 | * | |
1178 | * The upper 8 bits are reserved. It is as follows: | |
1179 | * Bits 0 - 23 = size | |
1180 | * Bits 24 - 30 = dynptr type | |
1181 | * Bit 31 = whether dynptr is read-only | |
1182 | */ | |
1183 | u32 size; | |
1184 | u32 offset; | |
1185 | } __aligned(8); | |
1186 | ||
1187 | enum bpf_dynptr_type { | |
1188 | BPF_DYNPTR_TYPE_INVALID, | |
1189 | /* Points to memory that is local to the bpf program */ | |
1190 | BPF_DYNPTR_TYPE_LOCAL, | |
1191 | /* Underlying data is a ringbuf record */ | |
1192 | BPF_DYNPTR_TYPE_RINGBUF, | |
b5964b96 JK |
1193 | /* Underlying data is a sk_buff */ |
1194 | BPF_DYNPTR_TYPE_SKB, | |
05421aec JK |
1195 | /* Underlying data is a xdp_buff */ |
1196 | BPF_DYNPTR_TYPE_XDP, | |
8357b366 JK |
1197 | }; |
1198 | ||
1199 | int bpf_dynptr_check_size(u32 size); | |
1200 | u32 bpf_dynptr_get_size(const struct bpf_dynptr_kern *ptr); | |
1201 | ||
fec56f58 | 1202 | #ifdef CONFIG_BPF_JIT |
f7e0beaf KFL |
1203 | int bpf_trampoline_link_prog(struct bpf_tramp_link *link, struct bpf_trampoline *tr); |
1204 | int bpf_trampoline_unlink_prog(struct bpf_tramp_link *link, struct bpf_trampoline *tr); | |
f7b12b6f THJ |
1205 | struct bpf_trampoline *bpf_trampoline_get(u64 key, |
1206 | struct bpf_attach_target_info *tgt_info); | |
fec56f58 | 1207 | void bpf_trampoline_put(struct bpf_trampoline *tr); |
19c02415 | 1208 | int arch_prepare_bpf_dispatcher(void *image, void *buf, s64 *funcs, int num_funcs); |
c86df29d PZ |
1209 | |
1210 | /* | |
1211 | * When the architecture supports STATIC_CALL replace the bpf_dispatcher_fn | |
1212 | * indirection with a direct call to the bpf program. If the architecture does | |
1213 | * not have STATIC_CALL, avoid a double-indirection. | |
1214 | */ | |
1215 | #ifdef CONFIG_HAVE_STATIC_CALL | |
1216 | ||
1217 | #define __BPF_DISPATCHER_SC_INIT(_name) \ | |
1218 | .sc_key = &STATIC_CALL_KEY(_name), \ | |
1219 | .sc_tramp = STATIC_CALL_TRAMP_ADDR(_name), | |
1220 | ||
1221 | #define __BPF_DISPATCHER_SC(name) \ | |
1222 | DEFINE_STATIC_CALL(bpf_dispatcher_##name##_call, bpf_dispatcher_nop_func) | |
1223 | ||
1224 | #define __BPF_DISPATCHER_CALL(name) \ | |
1225 | static_call(bpf_dispatcher_##name##_call)(ctx, insnsi, bpf_func) | |
1226 | ||
1227 | #define __BPF_DISPATCHER_UPDATE(_d, _new) \ | |
1228 | __static_call_update((_d)->sc_key, (_d)->sc_tramp, (_new)) | |
1229 | ||
1230 | #else | |
1231 | #define __BPF_DISPATCHER_SC_INIT(name) | |
1232 | #define __BPF_DISPATCHER_SC(name) | |
1233 | #define __BPF_DISPATCHER_CALL(name) bpf_func(ctx, insnsi) | |
1234 | #define __BPF_DISPATCHER_UPDATE(_d, _new) | |
1235 | #endif | |
dbe69b29 | 1236 | |
517b75e4 JO |
1237 | #define BPF_DISPATCHER_INIT(_name) { \ |
1238 | .mutex = __MUTEX_INITIALIZER(_name.mutex), \ | |
1239 | .func = &_name##_func, \ | |
1240 | .progs = {}, \ | |
1241 | .num_progs = 0, \ | |
1242 | .image = NULL, \ | |
1243 | .image_off = 0, \ | |
1244 | .ksym = { \ | |
1245 | .name = #_name, \ | |
1246 | .lnode = LIST_HEAD_INIT(_name.ksym.lnode), \ | |
1247 | }, \ | |
c86df29d | 1248 | __BPF_DISPATCHER_SC_INIT(_name##_call) \ |
75ccbef6 BT |
1249 | } |
1250 | ||
1251 | #define DEFINE_BPF_DISPATCHER(name) \ | |
c86df29d | 1252 | __BPF_DISPATCHER_SC(name); \ |
9f5b4009 | 1253 | noinline __nocfi unsigned int bpf_dispatcher_##name##_func( \ |
75ccbef6 BT |
1254 | const void *ctx, \ |
1255 | const struct bpf_insn *insnsi, \ | |
af3f4134 | 1256 | bpf_func_t bpf_func) \ |
75ccbef6 | 1257 | { \ |
c86df29d | 1258 | return __BPF_DISPATCHER_CALL(name); \ |
75ccbef6 | 1259 | } \ |
6a64037d BT |
1260 | EXPORT_SYMBOL(bpf_dispatcher_##name##_func); \ |
1261 | struct bpf_dispatcher bpf_dispatcher_##name = \ | |
18acb7fa | 1262 | BPF_DISPATCHER_INIT(bpf_dispatcher_##name); |
dbe69b29 | 1263 | |
75ccbef6 | 1264 | #define DECLARE_BPF_DISPATCHER(name) \ |
6a64037d | 1265 | unsigned int bpf_dispatcher_##name##_func( \ |
75ccbef6 BT |
1266 | const void *ctx, \ |
1267 | const struct bpf_insn *insnsi, \ | |
af3f4134 | 1268 | bpf_func_t bpf_func); \ |
6a64037d | 1269 | extern struct bpf_dispatcher bpf_dispatcher_##name; |
c86df29d | 1270 | |
6a64037d BT |
1271 | #define BPF_DISPATCHER_FUNC(name) bpf_dispatcher_##name##_func |
1272 | #define BPF_DISPATCHER_PTR(name) (&bpf_dispatcher_##name) | |
75ccbef6 BT |
1273 | void bpf_dispatcher_change_prog(struct bpf_dispatcher *d, struct bpf_prog *from, |
1274 | struct bpf_prog *to); | |
dba122fb | 1275 | /* Called only from JIT-enabled code, so there's no need for stubs. */ |
a108f7dc JO |
1276 | void bpf_image_ksym_add(void *data, struct bpf_ksym *ksym); |
1277 | void bpf_image_ksym_del(struct bpf_ksym *ksym); | |
dba122fb JO |
1278 | void bpf_ksym_add(struct bpf_ksym *ksym); |
1279 | void bpf_ksym_del(struct bpf_ksym *ksym); | |
3486bedd SL |
1280 | int bpf_jit_charge_modmem(u32 size); |
1281 | void bpf_jit_uncharge_modmem(u32 size); | |
f92c1e18 | 1282 | bool bpf_prog_has_trampoline(const struct bpf_prog *prog); |
fec56f58 | 1283 | #else |
f7e0beaf | 1284 | static inline int bpf_trampoline_link_prog(struct bpf_tramp_link *link, |
3aac1ead | 1285 | struct bpf_trampoline *tr) |
fec56f58 AS |
1286 | { |
1287 | return -ENOTSUPP; | |
1288 | } | |
f7e0beaf | 1289 | static inline int bpf_trampoline_unlink_prog(struct bpf_tramp_link *link, |
3aac1ead | 1290 | struct bpf_trampoline *tr) |
fec56f58 AS |
1291 | { |
1292 | return -ENOTSUPP; | |
1293 | } | |
f7b12b6f THJ |
1294 | static inline struct bpf_trampoline *bpf_trampoline_get(u64 key, |
1295 | struct bpf_attach_target_info *tgt_info) | |
1296 | { | |
1297 | return ERR_PTR(-EOPNOTSUPP); | |
1298 | } | |
fec56f58 | 1299 | static inline void bpf_trampoline_put(struct bpf_trampoline *tr) {} |
75ccbef6 BT |
1300 | #define DEFINE_BPF_DISPATCHER(name) |
1301 | #define DECLARE_BPF_DISPATCHER(name) | |
6a64037d | 1302 | #define BPF_DISPATCHER_FUNC(name) bpf_dispatcher_nop_func |
75ccbef6 BT |
1303 | #define BPF_DISPATCHER_PTR(name) NULL |
1304 | static inline void bpf_dispatcher_change_prog(struct bpf_dispatcher *d, | |
1305 | struct bpf_prog *from, | |
1306 | struct bpf_prog *to) {} | |
e9b4e606 JO |
1307 | static inline bool is_bpf_image_address(unsigned long address) |
1308 | { | |
1309 | return false; | |
1310 | } | |
f92c1e18 JO |
1311 | static inline bool bpf_prog_has_trampoline(const struct bpf_prog *prog) |
1312 | { | |
1313 | return false; | |
1314 | } | |
fec56f58 AS |
1315 | #endif |
1316 | ||
8c1b6e69 | 1317 | struct bpf_func_info_aux { |
51c39bb1 | 1318 | u16 linkage; |
8c1b6e69 AS |
1319 | bool unreliable; |
1320 | }; | |
1321 | ||
a66886fe DB |
1322 | enum bpf_jit_poke_reason { |
1323 | BPF_POKE_REASON_TAIL_CALL, | |
1324 | }; | |
1325 | ||
1326 | /* Descriptor of pokes pointing /into/ the JITed image. */ | |
1327 | struct bpf_jit_poke_descriptor { | |
cf71b174 | 1328 | void *tailcall_target; |
ebf7d1f5 MF |
1329 | void *tailcall_bypass; |
1330 | void *bypass_addr; | |
f263a814 | 1331 | void *aux; |
a66886fe DB |
1332 | union { |
1333 | struct { | |
1334 | struct bpf_map *map; | |
1335 | u32 key; | |
1336 | } tail_call; | |
1337 | }; | |
cf71b174 | 1338 | bool tailcall_target_stable; |
a66886fe DB |
1339 | u8 adj_off; |
1340 | u16 reason; | |
a748c697 | 1341 | u32 insn_idx; |
a66886fe DB |
1342 | }; |
1343 | ||
3c32cc1b YS |
1344 | /* reg_type info for ctx arguments */ |
1345 | struct bpf_ctx_arg_aux { | |
1346 | u32 offset; | |
1347 | enum bpf_reg_type reg_type; | |
951cf368 | 1348 | u32 btf_id; |
3c32cc1b YS |
1349 | }; |
1350 | ||
541c3bad AN |
1351 | struct btf_mod_pair { |
1352 | struct btf *btf; | |
1353 | struct module *module; | |
1354 | }; | |
1355 | ||
e6ac2450 MKL |
1356 | struct bpf_kfunc_desc_tab; |
1357 | ||
09756af4 | 1358 | struct bpf_prog_aux { |
85192dbf | 1359 | atomic64_t refcnt; |
24701ece | 1360 | u32 used_map_cnt; |
541c3bad | 1361 | u32 used_btf_cnt; |
32bbe007 | 1362 | u32 max_ctx_offset; |
e647815a | 1363 | u32 max_pkt_offset; |
9df1c28b | 1364 | u32 max_tp_access; |
8726679a | 1365 | u32 stack_depth; |
dc4bb0e2 | 1366 | u32 id; |
ba64e7d8 YS |
1367 | u32 func_cnt; /* used by non-func prog as the number of func progs */ |
1368 | u32 func_idx; /* 0 for non-func prog, the index in func array for func prog */ | |
ccfe29eb | 1369 | u32 attach_btf_id; /* in-kernel BTF type id to attach to */ |
3c32cc1b | 1370 | u32 ctx_arg_info_size; |
afbf21dc YS |
1371 | u32 max_rdonly_access; |
1372 | u32 max_rdwr_access; | |
22dc4a0f | 1373 | struct btf *attach_btf; |
3c32cc1b | 1374 | const struct bpf_ctx_arg_aux *ctx_arg_info; |
3aac1ead THJ |
1375 | struct mutex dst_mutex; /* protects dst_* pointers below, *after* prog becomes visible */ |
1376 | struct bpf_prog *dst_prog; | |
1377 | struct bpf_trampoline *dst_trampoline; | |
4a1e7c0c THJ |
1378 | enum bpf_prog_type saved_dst_prog_type; |
1379 | enum bpf_attach_type saved_dst_attach_type; | |
a4b1d3c1 | 1380 | bool verifier_zext; /* Zero extensions has been inserted by verifier. */ |
2b3486bc SF |
1381 | bool dev_bound; /* Program is bound to the netdev. */ |
1382 | bool offload_requested; /* Program is bound and offloaded to the netdev. */ | |
38207291 | 1383 | bool attach_btf_trace; /* true if attaching to BTF-enabled raw tp */ |
8c1b6e69 | 1384 | bool func_proto_unreliable; |
1e6c62a8 | 1385 | bool sleepable; |
ebf7d1f5 | 1386 | bool tail_call_reachable; |
c2f2cdbe | 1387 | bool xdp_has_frags; |
38207291 MKL |
1388 | /* BTF_KIND_FUNC_PROTO for valid attach_btf_id */ |
1389 | const struct btf_type *attach_func_proto; | |
1390 | /* function name for valid attach_btf_id */ | |
1391 | const char *attach_func_name; | |
1c2a088a AS |
1392 | struct bpf_prog **func; |
1393 | void *jit_data; /* JIT specific data. arch dependent */ | |
a66886fe | 1394 | struct bpf_jit_poke_descriptor *poke_tab; |
e6ac2450 | 1395 | struct bpf_kfunc_desc_tab *kfunc_tab; |
2357672c | 1396 | struct bpf_kfunc_btf_tab *kfunc_btf_tab; |
a66886fe | 1397 | u32 size_poke_tab; |
535911c8 | 1398 | struct bpf_ksym ksym; |
7de16e3a | 1399 | const struct bpf_prog_ops *ops; |
09756af4 | 1400 | struct bpf_map **used_maps; |
984fe94f | 1401 | struct mutex used_maps_mutex; /* mutex for used_maps and used_map_cnt */ |
541c3bad | 1402 | struct btf_mod_pair *used_btfs; |
09756af4 | 1403 | struct bpf_prog *prog; |
aaac3ba9 | 1404 | struct user_struct *user; |
cb4d2b3f | 1405 | u64 load_time; /* ns since boottime */ |
aba64c7d | 1406 | u32 verified_insns; |
69fd337a | 1407 | int cgroup_atype; /* enum cgroup_bpf_attach_type */ |
8bad74f9 | 1408 | struct bpf_map *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE]; |
067cae47 | 1409 | char name[BPF_OBJ_NAME_LEN]; |
afdb09c7 CF |
1410 | #ifdef CONFIG_SECURITY |
1411 | void *security; | |
1412 | #endif | |
0a9c1991 | 1413 | struct bpf_prog_offload *offload; |
838e9690 | 1414 | struct btf *btf; |
ba64e7d8 | 1415 | struct bpf_func_info *func_info; |
8c1b6e69 | 1416 | struct bpf_func_info_aux *func_info_aux; |
c454a46b MKL |
1417 | /* bpf_line_info loaded from userspace. linfo->insn_off |
1418 | * has the xlated insn offset. | |
1419 | * Both the main and sub prog share the same linfo. | |
1420 | * The subprog can access its first linfo by | |
1421 | * using the linfo_idx. | |
1422 | */ | |
1423 | struct bpf_line_info *linfo; | |
1424 | /* jited_linfo is the jited addr of the linfo. It has a | |
1425 | * one to one mapping to linfo: | |
1426 | * jited_linfo[i] is the jited addr for the linfo[i]->insn_off. | |
1427 | * Both the main and sub prog share the same jited_linfo. | |
1428 | * The subprog can access its first jited_linfo by | |
1429 | * using the linfo_idx. | |
1430 | */ | |
1431 | void **jited_linfo; | |
ba64e7d8 | 1432 | u32 func_info_cnt; |
c454a46b MKL |
1433 | u32 nr_linfo; |
1434 | /* subprog can use linfo_idx to access its first linfo and | |
1435 | * jited_linfo. | |
1436 | * main prog always has linfo_idx == 0 | |
1437 | */ | |
1438 | u32 linfo_idx; | |
31bf1dbc | 1439 | struct module *mod; |
3dec541b AS |
1440 | u32 num_exentries; |
1441 | struct exception_table_entry *extable; | |
abf2e7d6 AS |
1442 | union { |
1443 | struct work_struct work; | |
1444 | struct rcu_head rcu; | |
1445 | }; | |
09756af4 AS |
1446 | }; |
1447 | ||
d687f621 DK |
1448 | struct bpf_prog { |
1449 | u16 pages; /* Number of allocated pages */ | |
1450 | u16 jited:1, /* Is our filter JIT'ed? */ | |
1451 | jit_requested:1,/* archs need to JIT the prog */ | |
1452 | gpl_compatible:1, /* Is filter GPL compatible? */ | |
1453 | cb_access:1, /* Is control block accessed? */ | |
1454 | dst_needed:1, /* Do we need dst entry? */ | |
1455 | blinding_requested:1, /* needs constant blinding */ | |
1456 | blinded:1, /* Was blinded */ | |
1457 | is_func:1, /* program is a bpf function */ | |
1458 | kprobe_override:1, /* Do we override a kprobe? */ | |
1459 | has_callchain_buf:1, /* callchain buffer allocated? */ | |
1460 | enforce_expected_attach_type:1, /* Enforce expected_attach_type checking at attach time */ | |
1461 | call_get_stack:1, /* Do we call bpf_get_stack() or bpf_get_stackid() */ | |
1462 | call_get_func_ip:1, /* Do we call get_func_ip() */ | |
1463 | tstamp_type_access:1; /* Accessed __sk_buff->tstamp_type */ | |
1464 | enum bpf_prog_type type; /* Type of BPF program */ | |
1465 | enum bpf_attach_type expected_attach_type; /* For some prog types */ | |
1466 | u32 len; /* Number of filter blocks */ | |
1467 | u32 jited_len; /* Size of jited insns in bytes */ | |
1468 | u8 tag[BPF_TAG_SIZE]; | |
1469 | struct bpf_prog_stats __percpu *stats; | |
1470 | int __percpu *active; | |
1471 | unsigned int (*bpf_func)(const void *ctx, | |
1472 | const struct bpf_insn *insn); | |
1473 | struct bpf_prog_aux *aux; /* Auxiliary fields */ | |
1474 | struct sock_fprog_kern *orig_prog; /* Original BPF program */ | |
1475 | /* Instructions for interpreter */ | |
1476 | union { | |
1477 | DECLARE_FLEX_ARRAY(struct sock_filter, insns); | |
1478 | DECLARE_FLEX_ARRAY(struct bpf_insn, insnsi); | |
1479 | }; | |
1480 | }; | |
1481 | ||
2beee5f5 | 1482 | struct bpf_array_aux { |
da765a2f DB |
1483 | /* Programs with direct jumps into programs part of this array. */ |
1484 | struct list_head poke_progs; | |
1485 | struct bpf_map *map; | |
1486 | struct mutex poke_mutex; | |
1487 | struct work_struct work; | |
2beee5f5 DB |
1488 | }; |
1489 | ||
6cc7d1e8 AN |
1490 | struct bpf_link { |
1491 | atomic64_t refcnt; | |
1492 | u32 id; | |
1493 | enum bpf_link_type type; | |
1494 | const struct bpf_link_ops *ops; | |
1495 | struct bpf_prog *prog; | |
1496 | struct work_struct work; | |
1497 | }; | |
1498 | ||
1499 | struct bpf_link_ops { | |
1500 | void (*release)(struct bpf_link *link); | |
1501 | void (*dealloc)(struct bpf_link *link); | |
73b11c2a | 1502 | int (*detach)(struct bpf_link *link); |
6cc7d1e8 AN |
1503 | int (*update_prog)(struct bpf_link *link, struct bpf_prog *new_prog, |
1504 | struct bpf_prog *old_prog); | |
1505 | void (*show_fdinfo)(const struct bpf_link *link, struct seq_file *seq); | |
1506 | int (*fill_link_info)(const struct bpf_link *link, | |
1507 | struct bpf_link_info *info); | |
aef56f2e KFL |
1508 | int (*update_map)(struct bpf_link *link, struct bpf_map *new_map, |
1509 | struct bpf_map *old_map); | |
6cc7d1e8 AN |
1510 | }; |
1511 | ||
f7e0beaf KFL |
1512 | struct bpf_tramp_link { |
1513 | struct bpf_link link; | |
1514 | struct hlist_node tramp_hlist; | |
2fcc8241 | 1515 | u64 cookie; |
f7e0beaf KFL |
1516 | }; |
1517 | ||
69fd337a SF |
1518 | struct bpf_shim_tramp_link { |
1519 | struct bpf_tramp_link link; | |
1520 | struct bpf_trampoline *trampoline; | |
1521 | }; | |
1522 | ||
f7e0beaf KFL |
1523 | struct bpf_tracing_link { |
1524 | struct bpf_tramp_link link; | |
1525 | enum bpf_attach_type attach_type; | |
1526 | struct bpf_trampoline *trampoline; | |
1527 | struct bpf_prog *tgt_prog; | |
1528 | }; | |
1529 | ||
6cc7d1e8 AN |
1530 | struct bpf_link_primer { |
1531 | struct bpf_link *link; | |
1532 | struct file *file; | |
1533 | int fd; | |
1534 | u32 id; | |
1535 | }; | |
1536 | ||
85d33df3 | 1537 | struct bpf_struct_ops_value; |
27ae7997 MKL |
1538 | struct btf_member; |
1539 | ||
1540 | #define BPF_STRUCT_OPS_MAX_NR_MEMBERS 64 | |
1541 | struct bpf_struct_ops { | |
1542 | const struct bpf_verifier_ops *verifier_ops; | |
1543 | int (*init)(struct btf *btf); | |
1544 | int (*check_member)(const struct btf_type *t, | |
51a52a29 DV |
1545 | const struct btf_member *member, |
1546 | const struct bpf_prog *prog); | |
85d33df3 MKL |
1547 | int (*init_member)(const struct btf_type *t, |
1548 | const struct btf_member *member, | |
1549 | void *kdata, const void *udata); | |
1550 | int (*reg)(void *kdata); | |
1551 | void (*unreg)(void *kdata); | |
aef56f2e | 1552 | int (*update)(void *kdata, void *old_kdata); |
68b04864 | 1553 | int (*validate)(void *kdata); |
27ae7997 | 1554 | const struct btf_type *type; |
85d33df3 | 1555 | const struct btf_type *value_type; |
27ae7997 MKL |
1556 | const char *name; |
1557 | struct btf_func_model func_models[BPF_STRUCT_OPS_MAX_NR_MEMBERS]; | |
1558 | u32 type_id; | |
85d33df3 | 1559 | u32 value_id; |
27ae7997 MKL |
1560 | }; |
1561 | ||
1562 | #if defined(CONFIG_BPF_JIT) && defined(CONFIG_BPF_SYSCALL) | |
85d33df3 | 1563 | #define BPF_MODULE_OWNER ((void *)((0xeB9FUL << 2) + POISON_POINTER_DELTA)) |
27ae7997 | 1564 | const struct bpf_struct_ops *bpf_struct_ops_find(u32 type_id); |
d3e42bb0 | 1565 | void bpf_struct_ops_init(struct btf *btf, struct bpf_verifier_log *log); |
85d33df3 MKL |
1566 | bool bpf_struct_ops_get(const void *kdata); |
1567 | void bpf_struct_ops_put(const void *kdata); | |
1568 | int bpf_struct_ops_map_sys_lookup_elem(struct bpf_map *map, void *key, | |
1569 | void *value); | |
f7e0beaf KFL |
1570 | int bpf_struct_ops_prepare_trampoline(struct bpf_tramp_links *tlinks, |
1571 | struct bpf_tramp_link *link, | |
31a645ae HT |
1572 | const struct btf_func_model *model, |
1573 | void *image, void *image_end); | |
85d33df3 MKL |
1574 | static inline bool bpf_try_module_get(const void *data, struct module *owner) |
1575 | { | |
1576 | if (owner == BPF_MODULE_OWNER) | |
1577 | return bpf_struct_ops_get(data); | |
1578 | else | |
1579 | return try_module_get(owner); | |
1580 | } | |
1581 | static inline void bpf_module_put(const void *data, struct module *owner) | |
1582 | { | |
1583 | if (owner == BPF_MODULE_OWNER) | |
1584 | bpf_struct_ops_put(data); | |
1585 | else | |
1586 | module_put(owner); | |
1587 | } | |
68b04864 | 1588 | int bpf_struct_ops_link_create(union bpf_attr *attr); |
c196906d HT |
1589 | |
1590 | #ifdef CONFIG_NET | |
1591 | /* Define it here to avoid the use of forward declaration */ | |
1592 | struct bpf_dummy_ops_state { | |
1593 | int val; | |
1594 | }; | |
1595 | ||
1596 | struct bpf_dummy_ops { | |
1597 | int (*test_1)(struct bpf_dummy_ops_state *cb); | |
1598 | int (*test_2)(struct bpf_dummy_ops_state *cb, int a1, unsigned short a2, | |
1599 | char a3, unsigned long a4); | |
7dd88059 | 1600 | int (*test_sleepable)(struct bpf_dummy_ops_state *cb); |
c196906d HT |
1601 | }; |
1602 | ||
1603 | int bpf_struct_ops_test_run(struct bpf_prog *prog, const union bpf_attr *kattr, | |
1604 | union bpf_attr __user *uattr); | |
1605 | #endif | |
27ae7997 MKL |
1606 | #else |
1607 | static inline const struct bpf_struct_ops *bpf_struct_ops_find(u32 type_id) | |
1608 | { | |
1609 | return NULL; | |
1610 | } | |
d3e42bb0 MKL |
1611 | static inline void bpf_struct_ops_init(struct btf *btf, |
1612 | struct bpf_verifier_log *log) | |
1613 | { | |
1614 | } | |
85d33df3 MKL |
1615 | static inline bool bpf_try_module_get(const void *data, struct module *owner) |
1616 | { | |
1617 | return try_module_get(owner); | |
1618 | } | |
1619 | static inline void bpf_module_put(const void *data, struct module *owner) | |
1620 | { | |
1621 | module_put(owner); | |
1622 | } | |
1623 | static inline int bpf_struct_ops_map_sys_lookup_elem(struct bpf_map *map, | |
1624 | void *key, | |
1625 | void *value) | |
1626 | { | |
1627 | return -EINVAL; | |
1628 | } | |
68b04864 KFL |
1629 | static inline int bpf_struct_ops_link_create(union bpf_attr *attr) |
1630 | { | |
1631 | return -EOPNOTSUPP; | |
1632 | } | |
1633 | ||
9cb61fda SF |
1634 | #endif |
1635 | ||
1636 | #if defined(CONFIG_CGROUP_BPF) && defined(CONFIG_BPF_LSM) | |
1637 | int bpf_trampoline_link_cgroup_shim(struct bpf_prog *prog, | |
1638 | int cgroup_atype); | |
1639 | void bpf_trampoline_unlink_cgroup_shim(struct bpf_prog *prog); | |
1640 | #else | |
69fd337a SF |
1641 | static inline int bpf_trampoline_link_cgroup_shim(struct bpf_prog *prog, |
1642 | int cgroup_atype) | |
1643 | { | |
1644 | return -EOPNOTSUPP; | |
1645 | } | |
1646 | static inline void bpf_trampoline_unlink_cgroup_shim(struct bpf_prog *prog) | |
1647 | { | |
1648 | } | |
27ae7997 MKL |
1649 | #endif |
1650 | ||
04fd61ab AS |
1651 | struct bpf_array { |
1652 | struct bpf_map map; | |
1653 | u32 elem_size; | |
b2157399 | 1654 | u32 index_mask; |
2beee5f5 | 1655 | struct bpf_array_aux *aux; |
04fd61ab | 1656 | union { |
129d868e KC |
1657 | DECLARE_FLEX_ARRAY(char, value) __aligned(8); |
1658 | DECLARE_FLEX_ARRAY(void *, ptrs) __aligned(8); | |
1659 | DECLARE_FLEX_ARRAY(void __percpu *, pptrs) __aligned(8); | |
04fd61ab AS |
1660 | }; |
1661 | }; | |
3b1efb19 | 1662 | |
c04c0d2b | 1663 | #define BPF_COMPLEXITY_LIMIT_INSNS 1000000 /* yes. 1M insns */ |
ebf7f6f0 | 1664 | #define MAX_TAIL_CALL_CNT 33 |
04fd61ab | 1665 | |
6018e1f4 AN |
1666 | /* Maximum number of loops for bpf_loop and bpf_iter_num. |
1667 | * It's enum to expose it (and thus make it discoverable) through BTF. | |
1668 | */ | |
1669 | enum { | |
1670 | BPF_MAX_LOOPS = 8 * 1024 * 1024, | |
1671 | }; | |
1ade2371 | 1672 | |
591fe988 DB |
1673 | #define BPF_F_ACCESS_MASK (BPF_F_RDONLY | \ |
1674 | BPF_F_RDONLY_PROG | \ | |
1675 | BPF_F_WRONLY | \ | |
1676 | BPF_F_WRONLY_PROG) | |
1677 | ||
1678 | #define BPF_MAP_CAN_READ BIT(0) | |
1679 | #define BPF_MAP_CAN_WRITE BIT(1) | |
1680 | ||
20571567 DV |
1681 | /* Maximum number of user-producer ring buffer samples that can be drained in |
1682 | * a call to bpf_user_ringbuf_drain(). | |
1683 | */ | |
1684 | #define BPF_MAX_USER_RINGBUF_SAMPLES (128 * 1024) | |
1685 | ||
591fe988 DB |
1686 | static inline u32 bpf_map_flags_to_cap(struct bpf_map *map) |
1687 | { | |
1688 | u32 access_flags = map->map_flags & (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG); | |
1689 | ||
1690 | /* Combination of BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG is | |
1691 | * not possible. | |
1692 | */ | |
1693 | if (access_flags & BPF_F_RDONLY_PROG) | |
1694 | return BPF_MAP_CAN_READ; | |
1695 | else if (access_flags & BPF_F_WRONLY_PROG) | |
1696 | return BPF_MAP_CAN_WRITE; | |
1697 | else | |
1698 | return BPF_MAP_CAN_READ | BPF_MAP_CAN_WRITE; | |
1699 | } | |
1700 | ||
1701 | static inline bool bpf_map_flags_access_ok(u32 access_flags) | |
1702 | { | |
1703 | return (access_flags & (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG)) != | |
1704 | (BPF_F_RDONLY_PROG | BPF_F_WRONLY_PROG); | |
1705 | } | |
1706 | ||
3b1efb19 DB |
1707 | struct bpf_event_entry { |
1708 | struct perf_event *event; | |
1709 | struct file *perf_file; | |
1710 | struct file *map_file; | |
1711 | struct rcu_head rcu; | |
1712 | }; | |
1713 | ||
f45d5b6c THJ |
1714 | static inline bool map_type_contains_progs(struct bpf_map *map) |
1715 | { | |
1716 | return map->map_type == BPF_MAP_TYPE_PROG_ARRAY || | |
1717 | map->map_type == BPF_MAP_TYPE_DEVMAP || | |
1718 | map->map_type == BPF_MAP_TYPE_CPUMAP; | |
1719 | } | |
1720 | ||
1721 | bool bpf_prog_map_compatible(struct bpf_map *map, const struct bpf_prog *fp); | |
f1f7714e | 1722 | int bpf_prog_calc_tag(struct bpf_prog *fp); |
bd570ff9 | 1723 | |
0756ea3e | 1724 | const struct bpf_func_proto *bpf_get_trace_printk_proto(void); |
10aceb62 | 1725 | const struct bpf_func_proto *bpf_get_trace_vprintk_proto(void); |
555c8a86 DB |
1726 | |
1727 | typedef unsigned long (*bpf_ctx_copy_t)(void *dst, const void *src, | |
aa7145c1 | 1728 | unsigned long off, unsigned long len); |
c64b7983 JS |
1729 | typedef u32 (*bpf_convert_ctx_access_t)(enum bpf_access_type type, |
1730 | const struct bpf_insn *src, | |
1731 | struct bpf_insn *dst, | |
1732 | struct bpf_prog *prog, | |
1733 | u32 *target_size); | |
555c8a86 DB |
1734 | |
1735 | u64 bpf_event_output(struct bpf_map *map, u64 flags, void *meta, u64 meta_size, | |
1736 | void *ctx, u64 ctx_size, bpf_ctx_copy_t ctx_copy); | |
04fd61ab | 1737 | |
324bda9e AS |
1738 | /* an array of programs to be executed under rcu_lock. |
1739 | * | |
1740 | * Typical usage: | |
055eb955 | 1741 | * ret = bpf_prog_run_array(rcu_dereference(&bpf_prog_array), ctx, bpf_prog_run); |
324bda9e AS |
1742 | * |
1743 | * the structure returned by bpf_prog_array_alloc() should be populated | |
1744 | * with program pointers and the last pointer must be NULL. | |
1745 | * The user has to keep refcnt on the program and make sure the program | |
1746 | * is removed from the array before bpf_prog_put(). | |
1747 | * The 'struct bpf_prog_array *' should only be replaced with xchg() | |
1748 | * since other cpus are walking the array of pointers in parallel. | |
1749 | */ | |
394e40a2 RG |
1750 | struct bpf_prog_array_item { |
1751 | struct bpf_prog *prog; | |
82e6b1ee AN |
1752 | union { |
1753 | struct bpf_cgroup_storage *cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE]; | |
1754 | u64 bpf_cookie; | |
1755 | }; | |
394e40a2 RG |
1756 | }; |
1757 | ||
324bda9e AS |
1758 | struct bpf_prog_array { |
1759 | struct rcu_head rcu; | |
d7f10df8 | 1760 | struct bpf_prog_array_item items[]; |
324bda9e AS |
1761 | }; |
1762 | ||
46531a30 PB |
1763 | struct bpf_empty_prog_array { |
1764 | struct bpf_prog_array hdr; | |
1765 | struct bpf_prog *null_prog; | |
1766 | }; | |
1767 | ||
1768 | /* to avoid allocating empty bpf_prog_array for cgroups that | |
1769 | * don't have bpf program attached use one global 'bpf_empty_prog_array' | |
1770 | * It will not be modified the caller of bpf_prog_array_alloc() | |
1771 | * (since caller requested prog_cnt == 0) | |
1772 | * that pointer should be 'freed' by bpf_prog_array_free() | |
1773 | */ | |
1774 | extern struct bpf_empty_prog_array bpf_empty_prog_array; | |
1775 | ||
d29ab6e1 | 1776 | struct bpf_prog_array *bpf_prog_array_alloc(u32 prog_cnt, gfp_t flags); |
54e9c9d4 | 1777 | void bpf_prog_array_free(struct bpf_prog_array *progs); |
8c7dcb84 DK |
1778 | /* Use when traversal over the bpf_prog_array uses tasks_trace rcu */ |
1779 | void bpf_prog_array_free_sleepable(struct bpf_prog_array *progs); | |
54e9c9d4 | 1780 | int bpf_prog_array_length(struct bpf_prog_array *progs); |
0d01da6a | 1781 | bool bpf_prog_array_is_empty(struct bpf_prog_array *array); |
54e9c9d4 | 1782 | int bpf_prog_array_copy_to_user(struct bpf_prog_array *progs, |
468e2f64 | 1783 | __u32 __user *prog_ids, u32 cnt); |
324bda9e | 1784 | |
54e9c9d4 | 1785 | void bpf_prog_array_delete_safe(struct bpf_prog_array *progs, |
e87c6bc3 | 1786 | struct bpf_prog *old_prog); |
ce3aa9cc JS |
1787 | int bpf_prog_array_delete_safe_at(struct bpf_prog_array *array, int index); |
1788 | int bpf_prog_array_update_at(struct bpf_prog_array *array, int index, | |
1789 | struct bpf_prog *prog); | |
54e9c9d4 | 1790 | int bpf_prog_array_copy_info(struct bpf_prog_array *array, |
3a38bb98 YS |
1791 | u32 *prog_ids, u32 request_cnt, |
1792 | u32 *prog_cnt); | |
54e9c9d4 | 1793 | int bpf_prog_array_copy(struct bpf_prog_array *old_array, |
e87c6bc3 YS |
1794 | struct bpf_prog *exclude_prog, |
1795 | struct bpf_prog *include_prog, | |
82e6b1ee | 1796 | u64 bpf_cookie, |
e87c6bc3 YS |
1797 | struct bpf_prog_array **new_array); |
1798 | ||
c7603cfa AN |
1799 | struct bpf_run_ctx {}; |
1800 | ||
1801 | struct bpf_cg_run_ctx { | |
1802 | struct bpf_run_ctx run_ctx; | |
7d08c2c9 | 1803 | const struct bpf_prog_array_item *prog_item; |
c4dcfdd4 | 1804 | int retval; |
c7603cfa AN |
1805 | }; |
1806 | ||
82e6b1ee AN |
1807 | struct bpf_trace_run_ctx { |
1808 | struct bpf_run_ctx run_ctx; | |
1809 | u64 bpf_cookie; | |
1810 | }; | |
1811 | ||
e384c7b7 KFL |
1812 | struct bpf_tramp_run_ctx { |
1813 | struct bpf_run_ctx run_ctx; | |
1814 | u64 bpf_cookie; | |
1815 | struct bpf_run_ctx *saved_run_ctx; | |
1816 | }; | |
1817 | ||
7d08c2c9 AN |
1818 | static inline struct bpf_run_ctx *bpf_set_run_ctx(struct bpf_run_ctx *new_ctx) |
1819 | { | |
1820 | struct bpf_run_ctx *old_ctx = NULL; | |
1821 | ||
1822 | #ifdef CONFIG_BPF_SYSCALL | |
1823 | old_ctx = current->bpf_ctx; | |
1824 | current->bpf_ctx = new_ctx; | |
1825 | #endif | |
1826 | return old_ctx; | |
1827 | } | |
1828 | ||
1829 | static inline void bpf_reset_run_ctx(struct bpf_run_ctx *old_ctx) | |
1830 | { | |
1831 | #ifdef CONFIG_BPF_SYSCALL | |
1832 | current->bpf_ctx = old_ctx; | |
1833 | #endif | |
1834 | } | |
1835 | ||
77241217 SF |
1836 | /* BPF program asks to bypass CAP_NET_BIND_SERVICE in bind. */ |
1837 | #define BPF_RET_BIND_NO_CAP_NET_BIND_SERVICE (1 << 0) | |
1838 | /* BPF program asks to set CN on the packet. */ | |
1839 | #define BPF_RET_SET_CN (1 << 0) | |
1840 | ||
7d08c2c9 AN |
1841 | typedef u32 (*bpf_prog_run_fn)(const struct bpf_prog *prog, const void *ctx); |
1842 | ||
7d08c2c9 | 1843 | static __always_inline u32 |
055eb955 | 1844 | bpf_prog_run_array(const struct bpf_prog_array *array, |
7d08c2c9 AN |
1845 | const void *ctx, bpf_prog_run_fn run_prog) |
1846 | { | |
1847 | const struct bpf_prog_array_item *item; | |
1848 | const struct bpf_prog *prog; | |
82e6b1ee AN |
1849 | struct bpf_run_ctx *old_run_ctx; |
1850 | struct bpf_trace_run_ctx run_ctx; | |
7d08c2c9 AN |
1851 | u32 ret = 1; |
1852 | ||
055eb955 SF |
1853 | RCU_LOCKDEP_WARN(!rcu_read_lock_held(), "no rcu lock held"); |
1854 | ||
7d08c2c9 | 1855 | if (unlikely(!array)) |
055eb955 SF |
1856 | return ret; |
1857 | ||
1858 | migrate_disable(); | |
82e6b1ee | 1859 | old_run_ctx = bpf_set_run_ctx(&run_ctx.run_ctx); |
7d08c2c9 AN |
1860 | item = &array->items[0]; |
1861 | while ((prog = READ_ONCE(item->prog))) { | |
82e6b1ee | 1862 | run_ctx.bpf_cookie = item->bpf_cookie; |
7d08c2c9 AN |
1863 | ret &= run_prog(prog, ctx); |
1864 | item++; | |
1865 | } | |
82e6b1ee | 1866 | bpf_reset_run_ctx(old_run_ctx); |
7d08c2c9 AN |
1867 | migrate_enable(); |
1868 | return ret; | |
1869 | } | |
324bda9e | 1870 | |
8c7dcb84 DK |
1871 | /* Notes on RCU design for bpf_prog_arrays containing sleepable programs: |
1872 | * | |
1873 | * We use the tasks_trace rcu flavor read section to protect the bpf_prog_array | |
1874 | * overall. As a result, we must use the bpf_prog_array_free_sleepable | |
1875 | * in order to use the tasks_trace rcu grace period. | |
1876 | * | |
1877 | * When a non-sleepable program is inside the array, we take the rcu read | |
1878 | * section and disable preemption for that program alone, so it can access | |
1879 | * rcu-protected dynamically sized maps. | |
1880 | */ | |
1881 | static __always_inline u32 | |
1882 | bpf_prog_run_array_sleepable(const struct bpf_prog_array __rcu *array_rcu, | |
1883 | const void *ctx, bpf_prog_run_fn run_prog) | |
1884 | { | |
1885 | const struct bpf_prog_array_item *item; | |
1886 | const struct bpf_prog *prog; | |
1887 | const struct bpf_prog_array *array; | |
1888 | struct bpf_run_ctx *old_run_ctx; | |
1889 | struct bpf_trace_run_ctx run_ctx; | |
1890 | u32 ret = 1; | |
1891 | ||
1892 | might_fault(); | |
1893 | ||
1894 | rcu_read_lock_trace(); | |
1895 | migrate_disable(); | |
1896 | ||
1897 | array = rcu_dereference_check(array_rcu, rcu_read_lock_trace_held()); | |
1898 | if (unlikely(!array)) | |
1899 | goto out; | |
1900 | old_run_ctx = bpf_set_run_ctx(&run_ctx.run_ctx); | |
1901 | item = &array->items[0]; | |
1902 | while ((prog = READ_ONCE(item->prog))) { | |
1903 | if (!prog->aux->sleepable) | |
1904 | rcu_read_lock(); | |
1905 | ||
1906 | run_ctx.bpf_cookie = item->bpf_cookie; | |
1907 | ret &= run_prog(prog, ctx); | |
1908 | item++; | |
1909 | ||
1910 | if (!prog->aux->sleepable) | |
1911 | rcu_read_unlock(); | |
1912 | } | |
1913 | bpf_reset_run_ctx(old_run_ctx); | |
1914 | out: | |
1915 | migrate_enable(); | |
1916 | rcu_read_unlock_trace(); | |
1917 | return ret; | |
1918 | } | |
1919 | ||
89aa0758 | 1920 | #ifdef CONFIG_BPF_SYSCALL |
b121d1e7 | 1921 | DECLARE_PER_CPU(int, bpf_prog_active); |
d46edd67 | 1922 | extern struct mutex bpf_stats_enabled_mutex; |
b121d1e7 | 1923 | |
c518cfa0 TG |
1924 | /* |
1925 | * Block execution of BPF programs attached to instrumentation (perf, | |
1926 | * kprobes, tracepoints) to prevent deadlocks on map operations as any of | |
1927 | * these events can happen inside a region which holds a map bucket lock | |
1928 | * and can deadlock on it. | |
c518cfa0 TG |
1929 | */ |
1930 | static inline void bpf_disable_instrumentation(void) | |
1931 | { | |
1932 | migrate_disable(); | |
79364031 | 1933 | this_cpu_inc(bpf_prog_active); |
c518cfa0 TG |
1934 | } |
1935 | ||
1936 | static inline void bpf_enable_instrumentation(void) | |
1937 | { | |
79364031 | 1938 | this_cpu_dec(bpf_prog_active); |
c518cfa0 TG |
1939 | migrate_enable(); |
1940 | } | |
1941 | ||
f66e448c CF |
1942 | extern const struct file_operations bpf_map_fops; |
1943 | extern const struct file_operations bpf_prog_fops; | |
367ec3e4 | 1944 | extern const struct file_operations bpf_iter_fops; |
f66e448c | 1945 | |
91cc1a99 | 1946 | #define BPF_PROG_TYPE(_id, _name, prog_ctx_type, kern_ctx_type) \ |
7de16e3a JK |
1947 | extern const struct bpf_prog_ops _name ## _prog_ops; \ |
1948 | extern const struct bpf_verifier_ops _name ## _verifier_ops; | |
40077e0c JB |
1949 | #define BPF_MAP_TYPE(_id, _ops) \ |
1950 | extern const struct bpf_map_ops _ops; | |
f2e10bff | 1951 | #define BPF_LINK_TYPE(_id, _name) |
be9370a7 JB |
1952 | #include <linux/bpf_types.h> |
1953 | #undef BPF_PROG_TYPE | |
40077e0c | 1954 | #undef BPF_MAP_TYPE |
f2e10bff | 1955 | #undef BPF_LINK_TYPE |
0fc174de | 1956 | |
ab3f0063 | 1957 | extern const struct bpf_prog_ops bpf_offload_prog_ops; |
4f9218aa JK |
1958 | extern const struct bpf_verifier_ops tc_cls_act_analyzer_ops; |
1959 | extern const struct bpf_verifier_ops xdp_analyzer_ops; | |
1960 | ||
0fc174de | 1961 | struct bpf_prog *bpf_prog_get(u32 ufd); |
248f346f | 1962 | struct bpf_prog *bpf_prog_get_type_dev(u32 ufd, enum bpf_prog_type type, |
288b3de5 | 1963 | bool attach_drv); |
85192dbf | 1964 | void bpf_prog_add(struct bpf_prog *prog, int i); |
c540594f | 1965 | void bpf_prog_sub(struct bpf_prog *prog, int i); |
85192dbf | 1966 | void bpf_prog_inc(struct bpf_prog *prog); |
a6f6df69 | 1967 | struct bpf_prog * __must_check bpf_prog_inc_not_zero(struct bpf_prog *prog); |
61e021f3 DB |
1968 | void bpf_prog_put(struct bpf_prog *prog); |
1969 | ||
e7895f01 | 1970 | void bpf_prog_free_id(struct bpf_prog *prog); |
158e5e9e | 1971 | void bpf_map_free_id(struct bpf_map *map); |
ad8ad79f | 1972 | |
aa3496ac | 1973 | struct btf_field *btf_record_find(const struct btf_record *rec, |
74843b57 | 1974 | u32 offset, u32 field_mask); |
aa3496ac KKD |
1975 | void btf_record_free(struct btf_record *rec); |
1976 | void bpf_map_free_record(struct bpf_map *map); | |
1977 | struct btf_record *btf_record_dup(const struct btf_record *rec); | |
1978 | bool btf_record_equal(const struct btf_record *rec_a, const struct btf_record *rec_b); | |
db559117 | 1979 | void bpf_obj_free_timer(const struct btf_record *rec, void *obj); |
aa3496ac | 1980 | void bpf_obj_free_fields(const struct btf_record *rec, void *obj); |
61df10c7 | 1981 | |
1ed4d924 | 1982 | struct bpf_map *bpf_map_get(u32 ufd); |
c9da161c | 1983 | struct bpf_map *bpf_map_get_with_uref(u32 ufd); |
c2101297 | 1984 | struct bpf_map *__bpf_map_get(struct fd f); |
1e0bd5a0 AN |
1985 | void bpf_map_inc(struct bpf_map *map); |
1986 | void bpf_map_inc_with_uref(struct bpf_map *map); | |
b671c206 | 1987 | struct bpf_map *__bpf_map_inc_not_zero(struct bpf_map *map, bool uref); |
1e0bd5a0 | 1988 | struct bpf_map * __must_check bpf_map_inc_not_zero(struct bpf_map *map); |
c9da161c | 1989 | void bpf_map_put_with_uref(struct bpf_map *map); |
61e021f3 | 1990 | void bpf_map_put(struct bpf_map *map); |
196e8ca7 DB |
1991 | void *bpf_map_area_alloc(u64 size, int numa_node); |
1992 | void *bpf_map_area_mmapable_alloc(u64 size, int numa_node); | |
d407bd25 | 1993 | void bpf_map_area_free(void *base); |
353050be | 1994 | bool bpf_map_write_active(const struct bpf_map *map); |
bd475643 | 1995 | void bpf_map_init_from_attr(struct bpf_map *map, union bpf_attr *attr); |
cb4d03ab BV |
1996 | int generic_map_lookup_batch(struct bpf_map *map, |
1997 | const union bpf_attr *attr, | |
aa2e93b8 | 1998 | union bpf_attr __user *uattr); |
3af43ba4 | 1999 | int generic_map_update_batch(struct bpf_map *map, struct file *map_file, |
aa2e93b8 BV |
2000 | const union bpf_attr *attr, |
2001 | union bpf_attr __user *uattr); | |
2002 | int generic_map_delete_batch(struct bpf_map *map, | |
2003 | const union bpf_attr *attr, | |
cb4d03ab | 2004 | union bpf_attr __user *uattr); |
6086d29d | 2005 | struct bpf_map *bpf_map_get_curr_or_next(u32 *id); |
a228a64f | 2006 | struct bpf_prog *bpf_prog_get_curr_or_next(u32 *id); |
61e021f3 | 2007 | |
48edc1f7 RG |
2008 | #ifdef CONFIG_MEMCG_KMEM |
2009 | void *bpf_map_kmalloc_node(const struct bpf_map *map, size_t size, gfp_t flags, | |
2010 | int node); | |
2011 | void *bpf_map_kzalloc(const struct bpf_map *map, size_t size, gfp_t flags); | |
ddef81b5 YS |
2012 | void *bpf_map_kvcalloc(struct bpf_map *map, size_t n, size_t size, |
2013 | gfp_t flags); | |
48edc1f7 RG |
2014 | void __percpu *bpf_map_alloc_percpu(const struct bpf_map *map, size_t size, |
2015 | size_t align, gfp_t flags); | |
2016 | #else | |
2017 | static inline void * | |
2018 | bpf_map_kmalloc_node(const struct bpf_map *map, size_t size, gfp_t flags, | |
2019 | int node) | |
2020 | { | |
2021 | return kmalloc_node(size, flags, node); | |
2022 | } | |
2023 | ||
2024 | static inline void * | |
2025 | bpf_map_kzalloc(const struct bpf_map *map, size_t size, gfp_t flags) | |
2026 | { | |
2027 | return kzalloc(size, flags); | |
2028 | } | |
2029 | ||
ddef81b5 YS |
2030 | static inline void * |
2031 | bpf_map_kvcalloc(struct bpf_map *map, size_t n, size_t size, gfp_t flags) | |
2032 | { | |
2033 | return kvcalloc(n, size, flags); | |
2034 | } | |
2035 | ||
48edc1f7 RG |
2036 | static inline void __percpu * |
2037 | bpf_map_alloc_percpu(const struct bpf_map *map, size_t size, size_t align, | |
2038 | gfp_t flags) | |
2039 | { | |
2040 | return __alloc_percpu_gfp(size, align, flags); | |
2041 | } | |
2042 | #endif | |
2043 | ||
1be7f75d AS |
2044 | extern int sysctl_unprivileged_bpf_disabled; |
2045 | ||
2c78ee89 AS |
2046 | static inline bool bpf_allow_ptr_leaks(void) |
2047 | { | |
2048 | return perfmon_capable(); | |
2049 | } | |
2050 | ||
01f810ac AM |
2051 | static inline bool bpf_allow_uninit_stack(void) |
2052 | { | |
2053 | return perfmon_capable(); | |
2054 | } | |
2055 | ||
2c78ee89 AS |
2056 | static inline bool bpf_bypass_spec_v1(void) |
2057 | { | |
2058 | return perfmon_capable(); | |
2059 | } | |
2060 | ||
2061 | static inline bool bpf_bypass_spec_v4(void) | |
2062 | { | |
2063 | return perfmon_capable(); | |
2064 | } | |
2065 | ||
6e71b04a | 2066 | int bpf_map_new_fd(struct bpf_map *map, int flags); |
b2197755 DB |
2067 | int bpf_prog_new_fd(struct bpf_prog *prog); |
2068 | ||
f2e10bff | 2069 | void bpf_link_init(struct bpf_link *link, enum bpf_link_type type, |
a3b80e10 AN |
2070 | const struct bpf_link_ops *ops, struct bpf_prog *prog); |
2071 | int bpf_link_prime(struct bpf_link *link, struct bpf_link_primer *primer); | |
2072 | int bpf_link_settle(struct bpf_link_primer *primer); | |
2073 | void bpf_link_cleanup(struct bpf_link_primer *primer); | |
70ed506c AN |
2074 | void bpf_link_inc(struct bpf_link *link); |
2075 | void bpf_link_put(struct bpf_link *link); | |
2076 | int bpf_link_new_fd(struct bpf_link *link); | |
babf3164 | 2077 | struct file *bpf_link_new_file(struct bpf_link *link, int *reserved_fd); |
70ed506c | 2078 | struct bpf_link *bpf_link_get_from_fd(u32 ufd); |
9f883612 | 2079 | struct bpf_link *bpf_link_get_curr_or_next(u32 *id); |
70ed506c | 2080 | |
b2197755 | 2081 | int bpf_obj_pin_user(u32 ufd, const char __user *pathname); |
6e71b04a | 2082 | int bpf_obj_get_user(const char __user *pathname, int flags); |
b2197755 | 2083 | |
21aef70e | 2084 | #define BPF_ITER_FUNC_PREFIX "bpf_iter_" |
e5158d98 | 2085 | #define DEFINE_BPF_ITER_FUNC(target, args...) \ |
21aef70e YS |
2086 | extern int bpf_iter_ ## target(args); \ |
2087 | int __init bpf_iter_ ## target(args) { return 0; } | |
15d83c4d | 2088 | |
f0d74c4d KFL |
2089 | /* |
2090 | * The task type of iterators. | |
2091 | * | |
2092 | * For BPF task iterators, they can be parameterized with various | |
2093 | * parameters to visit only some of tasks. | |
2094 | * | |
2095 | * BPF_TASK_ITER_ALL (default) | |
2096 | * Iterate over resources of every task. | |
2097 | * | |
2098 | * BPF_TASK_ITER_TID | |
2099 | * Iterate over resources of a task/tid. | |
2100 | * | |
2101 | * BPF_TASK_ITER_TGID | |
2102 | * Iterate over resources of every task of a process / task group. | |
2103 | */ | |
2104 | enum bpf_iter_task_type { | |
2105 | BPF_TASK_ITER_ALL = 0, | |
2106 | BPF_TASK_ITER_TID, | |
2107 | BPF_TASK_ITER_TGID, | |
2108 | }; | |
2109 | ||
f9c79272 | 2110 | struct bpf_iter_aux_info { |
d4ccaf58 | 2111 | /* for map_elem iter */ |
a5cbe05a | 2112 | struct bpf_map *map; |
d4ccaf58 HL |
2113 | |
2114 | /* for cgroup iter */ | |
2115 | struct { | |
2116 | struct cgroup *start; /* starting cgroup */ | |
2117 | enum bpf_cgroup_iter_order order; | |
2118 | } cgroup; | |
f0d74c4d KFL |
2119 | struct { |
2120 | enum bpf_iter_task_type type; | |
2121 | u32 pid; | |
2122 | } task; | |
f9c79272 YS |
2123 | }; |
2124 | ||
5e7b3020 YS |
2125 | typedef int (*bpf_iter_attach_target_t)(struct bpf_prog *prog, |
2126 | union bpf_iter_link_info *linfo, | |
2127 | struct bpf_iter_aux_info *aux); | |
2128 | typedef void (*bpf_iter_detach_target_t)(struct bpf_iter_aux_info *aux); | |
6b0a249a YS |
2129 | typedef void (*bpf_iter_show_fdinfo_t) (const struct bpf_iter_aux_info *aux, |
2130 | struct seq_file *seq); | |
2131 | typedef int (*bpf_iter_fill_link_info_t)(const struct bpf_iter_aux_info *aux, | |
2132 | struct bpf_link_info *info); | |
3cee6fb8 MKL |
2133 | typedef const struct bpf_func_proto * |
2134 | (*bpf_iter_get_func_proto_t)(enum bpf_func_id func_id, | |
2135 | const struct bpf_prog *prog); | |
a5cbe05a | 2136 | |
cf83b2d2 YS |
2137 | enum bpf_iter_feature { |
2138 | BPF_ITER_RESCHED = BIT(0), | |
2139 | }; | |
2140 | ||
3c32cc1b | 2141 | #define BPF_ITER_CTX_ARG_MAX 2 |
ae24345d YS |
2142 | struct bpf_iter_reg { |
2143 | const char *target; | |
5e7b3020 YS |
2144 | bpf_iter_attach_target_t attach_target; |
2145 | bpf_iter_detach_target_t detach_target; | |
6b0a249a YS |
2146 | bpf_iter_show_fdinfo_t show_fdinfo; |
2147 | bpf_iter_fill_link_info_t fill_link_info; | |
3cee6fb8 | 2148 | bpf_iter_get_func_proto_t get_func_proto; |
3c32cc1b | 2149 | u32 ctx_arg_info_size; |
cf83b2d2 | 2150 | u32 feature; |
3c32cc1b | 2151 | struct bpf_ctx_arg_aux ctx_arg_info[BPF_ITER_CTX_ARG_MAX]; |
14fc6bd6 | 2152 | const struct bpf_iter_seq_info *seq_info; |
ae24345d YS |
2153 | }; |
2154 | ||
e5158d98 YS |
2155 | struct bpf_iter_meta { |
2156 | __bpf_md_ptr(struct seq_file *, seq); | |
2157 | u64 session_id; | |
2158 | u64 seq_num; | |
2159 | }; | |
2160 | ||
a5cbe05a YS |
2161 | struct bpf_iter__bpf_map_elem { |
2162 | __bpf_md_ptr(struct bpf_iter_meta *, meta); | |
2163 | __bpf_md_ptr(struct bpf_map *, map); | |
2164 | __bpf_md_ptr(void *, key); | |
2165 | __bpf_md_ptr(void *, value); | |
2166 | }; | |
2167 | ||
15172a46 | 2168 | int bpf_iter_reg_target(const struct bpf_iter_reg *reg_info); |
ab2ee4fc | 2169 | void bpf_iter_unreg_target(const struct bpf_iter_reg *reg_info); |
15d83c4d | 2170 | bool bpf_iter_prog_supported(struct bpf_prog *prog); |
3cee6fb8 MKL |
2171 | const struct bpf_func_proto * |
2172 | bpf_iter_get_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog); | |
af2ac3e1 | 2173 | int bpf_iter_link_attach(const union bpf_attr *attr, bpfptr_t uattr, struct bpf_prog *prog); |
ac51d99b | 2174 | int bpf_iter_new_fd(struct bpf_link *link); |
367ec3e4 | 2175 | bool bpf_link_is_iter(struct bpf_link *link); |
e5158d98 YS |
2176 | struct bpf_prog *bpf_iter_get_info(struct bpf_iter_meta *meta, bool in_stop); |
2177 | int bpf_iter_run_prog(struct bpf_prog *prog, void *ctx); | |
b76f2226 YS |
2178 | void bpf_iter_map_show_fdinfo(const struct bpf_iter_aux_info *aux, |
2179 | struct seq_file *seq); | |
2180 | int bpf_iter_map_fill_link_info(const struct bpf_iter_aux_info *aux, | |
2181 | struct bpf_link_info *info); | |
ae24345d | 2182 | |
314ee05e YS |
2183 | int map_set_for_each_callback_args(struct bpf_verifier_env *env, |
2184 | struct bpf_func_state *caller, | |
2185 | struct bpf_func_state *callee); | |
2186 | ||
15a07b33 AS |
2187 | int bpf_percpu_hash_copy(struct bpf_map *map, void *key, void *value); |
2188 | int bpf_percpu_array_copy(struct bpf_map *map, void *key, void *value); | |
2189 | int bpf_percpu_hash_update(struct bpf_map *map, void *key, void *value, | |
2190 | u64 flags); | |
2191 | int bpf_percpu_array_update(struct bpf_map *map, void *key, void *value, | |
2192 | u64 flags); | |
d056a788 | 2193 | |
557c0c6e | 2194 | int bpf_stackmap_copy(struct bpf_map *map, void *key, void *value); |
15a07b33 | 2195 | |
d056a788 DB |
2196 | int bpf_fd_array_map_update_elem(struct bpf_map *map, struct file *map_file, |
2197 | void *key, void *value, u64 map_flags); | |
14dc6f04 | 2198 | int bpf_fd_array_map_lookup_elem(struct bpf_map *map, void *key, u32 *value); |
bcc6b1b7 MKL |
2199 | int bpf_fd_htab_map_update_elem(struct bpf_map *map, struct file *map_file, |
2200 | void *key, void *value, u64 map_flags); | |
14dc6f04 | 2201 | int bpf_fd_htab_map_lookup_elem(struct bpf_map *map, void *key, u32 *value); |
d056a788 | 2202 | |
6e71b04a | 2203 | int bpf_get_file_flag(int flags); |
af2ac3e1 | 2204 | int bpf_check_uarg_tail_zero(bpfptr_t uaddr, size_t expected_size, |
dcab51f1 | 2205 | size_t actual_size); |
6e71b04a | 2206 | |
61e021f3 | 2207 | /* verify correctness of eBPF program */ |
47a71c1f | 2208 | int bpf_check(struct bpf_prog **fp, union bpf_attr *attr, bpfptr_t uattr, u32 uattr_size); |
a643bff7 AN |
2209 | |
2210 | #ifndef CONFIG_BPF_JIT_ALWAYS_ON | |
1ea47e01 | 2211 | void bpf_patch_call_args(struct bpf_insn *insn, u32 stack_depth); |
a643bff7 | 2212 | #endif |
46f55cff | 2213 | |
76654e67 AM |
2214 | struct btf *bpf_get_btf_vmlinux(void); |
2215 | ||
46f55cff | 2216 | /* Map specifics */ |
d53ad5d8 | 2217 | struct xdp_frame; |
6d5fc195 | 2218 | struct sk_buff; |
e6a4750f BT |
2219 | struct bpf_dtab_netdev; |
2220 | struct bpf_cpu_map_entry; | |
67f29e07 | 2221 | |
1d233886 | 2222 | void __dev_flush(void); |
d53ad5d8 | 2223 | int dev_xdp_enqueue(struct net_device *dev, struct xdp_frame *xdpf, |
1d233886 | 2224 | struct net_device *dev_rx); |
d53ad5d8 | 2225 | int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_frame *xdpf, |
38edddb8 | 2226 | struct net_device *dev_rx); |
d53ad5d8 | 2227 | int dev_map_enqueue_multi(struct xdp_frame *xdpf, struct net_device *dev_rx, |
e624d4ed | 2228 | struct bpf_map *map, bool exclude_ingress); |
6d5fc195 TM |
2229 | int dev_map_generic_redirect(struct bpf_dtab_netdev *dst, struct sk_buff *skb, |
2230 | struct bpf_prog *xdp_prog); | |
e624d4ed HL |
2231 | int dev_map_redirect_multi(struct net_device *dev, struct sk_buff *skb, |
2232 | struct bpf_prog *xdp_prog, struct bpf_map *map, | |
2233 | bool exclude_ingress); | |
46f55cff | 2234 | |
cdfafe98 | 2235 | void __cpu_map_flush(void); |
d53ad5d8 | 2236 | int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu, struct xdp_frame *xdpf, |
9c270af3 | 2237 | struct net_device *dev_rx); |
11941f8a KKD |
2238 | int cpu_map_generic_redirect(struct bpf_cpu_map_entry *rcpu, |
2239 | struct sk_buff *skb); | |
9c270af3 | 2240 | |
96eabe7a MKL |
2241 | /* Return map's numa specified by userspace */ |
2242 | static inline int bpf_map_attr_numa_node(const union bpf_attr *attr) | |
2243 | { | |
2244 | return (attr->map_flags & BPF_F_NUMA_NODE) ? | |
2245 | attr->numa_node : NUMA_NO_NODE; | |
2246 | } | |
2247 | ||
040ee692 | 2248 | struct bpf_prog *bpf_prog_get_type_path(const char *name, enum bpf_prog_type type); |
5dc4c4b7 | 2249 | int array_map_alloc_check(union bpf_attr *attr); |
040ee692 | 2250 | |
c695865c SF |
2251 | int bpf_prog_test_run_xdp(struct bpf_prog *prog, const union bpf_attr *kattr, |
2252 | union bpf_attr __user *uattr); | |
2253 | int bpf_prog_test_run_skb(struct bpf_prog *prog, const union bpf_attr *kattr, | |
2254 | union bpf_attr __user *uattr); | |
da00d2f1 KS |
2255 | int bpf_prog_test_run_tracing(struct bpf_prog *prog, |
2256 | const union bpf_attr *kattr, | |
2257 | union bpf_attr __user *uattr); | |
c695865c SF |
2258 | int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog, |
2259 | const union bpf_attr *kattr, | |
2260 | union bpf_attr __user *uattr); | |
1b4d60ec SL |
2261 | int bpf_prog_test_run_raw_tp(struct bpf_prog *prog, |
2262 | const union bpf_attr *kattr, | |
2263 | union bpf_attr __user *uattr); | |
7c32e8f8 LB |
2264 | int bpf_prog_test_run_sk_lookup(struct bpf_prog *prog, |
2265 | const union bpf_attr *kattr, | |
2266 | union bpf_attr __user *uattr); | |
2b99ef22 FW |
2267 | int bpf_prog_test_run_nf(struct bpf_prog *prog, |
2268 | const union bpf_attr *kattr, | |
2269 | union bpf_attr __user *uattr); | |
9e15db66 AS |
2270 | bool btf_ctx_access(int off, int size, enum bpf_access_type type, |
2271 | const struct bpf_prog *prog, | |
2272 | struct bpf_insn_access_aux *info); | |
35346ab6 HT |
2273 | |
2274 | static inline bool bpf_tracing_ctx_access(int off, int size, | |
2275 | enum bpf_access_type type) | |
2276 | { | |
2277 | if (off < 0 || off >= sizeof(__u64) * MAX_BPF_FUNC_ARGS) | |
2278 | return false; | |
2279 | if (type != BPF_READ) | |
2280 | return false; | |
2281 | if (off % size != 0) | |
2282 | return false; | |
2283 | return true; | |
2284 | } | |
2285 | ||
2286 | static inline bool bpf_tracing_btf_ctx_access(int off, int size, | |
2287 | enum bpf_access_type type, | |
2288 | const struct bpf_prog *prog, | |
2289 | struct bpf_insn_access_aux *info) | |
2290 | { | |
2291 | if (!bpf_tracing_ctx_access(off, size, type)) | |
2292 | return false; | |
2293 | return btf_ctx_access(off, size, type, prog, info); | |
2294 | } | |
2295 | ||
6728aea7 KKD |
2296 | int btf_struct_access(struct bpf_verifier_log *log, |
2297 | const struct bpf_reg_state *reg, | |
2298 | int off, int size, enum bpf_access_type atype, | |
63260df1 | 2299 | u32 *next_btf_id, enum bpf_type_flag *flag, const char **field_name); |
faaf4a79 | 2300 | bool btf_struct_ids_match(struct bpf_verifier_log *log, |
22dc4a0f | 2301 | const struct btf *btf, u32 id, int off, |
2ab3b380 KKD |
2302 | const struct btf *need_btf, u32 need_type_id, |
2303 | bool strict); | |
9e15db66 | 2304 | |
fec56f58 AS |
2305 | int btf_distill_func_proto(struct bpf_verifier_log *log, |
2306 | struct btf *btf, | |
2307 | const struct btf_type *func_proto, | |
2308 | const char *func_name, | |
2309 | struct btf_func_model *m); | |
2310 | ||
51c39bb1 | 2311 | struct bpf_reg_state; |
34747c41 MKL |
2312 | int btf_check_subprog_arg_match(struct bpf_verifier_env *env, int subprog, |
2313 | struct bpf_reg_state *regs); | |
95f2f26f BT |
2314 | int btf_check_subprog_call(struct bpf_verifier_env *env, int subprog, |
2315 | struct bpf_reg_state *regs); | |
51c39bb1 AS |
2316 | int btf_prepare_func_args(struct bpf_verifier_env *env, int subprog, |
2317 | struct bpf_reg_state *reg); | |
efc68158 | 2318 | int btf_check_type_match(struct bpf_verifier_log *log, const struct bpf_prog *prog, |
be8704ff | 2319 | struct btf *btf, const struct btf_type *t); |
8c1b6e69 | 2320 | |
7e6897f9 | 2321 | struct bpf_prog *bpf_prog_by_id(u32 id); |
005142b8 | 2322 | struct bpf_link *bpf_link_by_id(u32 id); |
7e6897f9 | 2323 | |
6890896b | 2324 | const struct bpf_func_proto *bpf_base_func_proto(enum bpf_func_id func_id); |
a10787e6 | 2325 | void bpf_task_storage_free(struct task_struct *task); |
c4bcfb38 | 2326 | void bpf_cgrp_storage_free(struct cgroup *cgroup); |
e6ac2450 MKL |
2327 | bool bpf_prog_has_kfunc_call(const struct bpf_prog *prog); |
2328 | const struct btf_func_model * | |
2329 | bpf_jit_find_kfunc_model(const struct bpf_prog *prog, | |
2330 | const struct bpf_insn *insn); | |
1cf3bfc6 IL |
2331 | int bpf_get_kfunc_addr(const struct bpf_prog *prog, u32 func_id, |
2332 | u16 btf_fd_idx, u8 **func_addr); | |
2333 | ||
fbd94c7a AS |
2334 | struct bpf_core_ctx { |
2335 | struct bpf_verifier_log *log; | |
2336 | const struct btf *btf; | |
2337 | }; | |
2338 | ||
57539b1c DV |
2339 | bool btf_nested_type_is_trusted(struct bpf_verifier_log *log, |
2340 | const struct bpf_reg_state *reg, | |
63260df1 | 2341 | const char *field_name, u32 btf_id, const char *suffix); |
57539b1c | 2342 | |
b613d335 DV |
2343 | bool btf_type_ids_nocast_alias(struct bpf_verifier_log *log, |
2344 | const struct btf *reg_btf, u32 reg_id, | |
2345 | const struct btf *arg_btf, u32 arg_id); | |
2346 | ||
fbd94c7a AS |
2347 | int bpf_core_apply(struct bpf_core_ctx *ctx, const struct bpf_core_relo *relo, |
2348 | int relo_idx, void *insn); | |
2349 | ||
44a3918c JP |
2350 | static inline bool unprivileged_ebpf_enabled(void) |
2351 | { | |
2352 | return !sysctl_unprivileged_bpf_disabled; | |
2353 | } | |
2354 | ||
24426654 MKL |
2355 | /* Not all bpf prog type has the bpf_ctx. |
2356 | * For the bpf prog type that has initialized the bpf_ctx, | |
2357 | * this function can be used to decide if a kernel function | |
2358 | * is called by a bpf program. | |
2359 | */ | |
2360 | static inline bool has_current_bpf_ctx(void) | |
2361 | { | |
2362 | return !!current->bpf_ctx; | |
2363 | } | |
05b24ff9 JO |
2364 | |
2365 | void notrace bpf_prog_inc_misses_counter(struct bpf_prog *prog); | |
8357b366 JK |
2366 | |
2367 | void bpf_dynptr_init(struct bpf_dynptr_kern *ptr, void *data, | |
2368 | enum bpf_dynptr_type type, u32 offset, u32 size); | |
2369 | void bpf_dynptr_set_null(struct bpf_dynptr_kern *ptr); | |
2370 | void bpf_dynptr_set_rdonly(struct bpf_dynptr_kern *ptr); | |
9c270af3 | 2371 | #else /* !CONFIG_BPF_SYSCALL */ |
0fc174de DB |
2372 | static inline struct bpf_prog *bpf_prog_get(u32 ufd) |
2373 | { | |
2374 | return ERR_PTR(-EOPNOTSUPP); | |
2375 | } | |
2376 | ||
248f346f JK |
2377 | static inline struct bpf_prog *bpf_prog_get_type_dev(u32 ufd, |
2378 | enum bpf_prog_type type, | |
288b3de5 | 2379 | bool attach_drv) |
248f346f JK |
2380 | { |
2381 | return ERR_PTR(-EOPNOTSUPP); | |
2382 | } | |
2383 | ||
85192dbf | 2384 | static inline void bpf_prog_add(struct bpf_prog *prog, int i) |
cc2e0b3f | 2385 | { |
cc2e0b3f | 2386 | } |
113214be | 2387 | |
c540594f DB |
2388 | static inline void bpf_prog_sub(struct bpf_prog *prog, int i) |
2389 | { | |
2390 | } | |
2391 | ||
0fc174de DB |
2392 | static inline void bpf_prog_put(struct bpf_prog *prog) |
2393 | { | |
2394 | } | |
6d67942d | 2395 | |
85192dbf | 2396 | static inline void bpf_prog_inc(struct bpf_prog *prog) |
aa6a5f3c | 2397 | { |
aa6a5f3c | 2398 | } |
5ccb071e | 2399 | |
a6f6df69 JF |
2400 | static inline struct bpf_prog *__must_check |
2401 | bpf_prog_inc_not_zero(struct bpf_prog *prog) | |
2402 | { | |
2403 | return ERR_PTR(-EOPNOTSUPP); | |
2404 | } | |
2405 | ||
6cc7d1e8 AN |
2406 | static inline void bpf_link_init(struct bpf_link *link, enum bpf_link_type type, |
2407 | const struct bpf_link_ops *ops, | |
2408 | struct bpf_prog *prog) | |
2409 | { | |
2410 | } | |
2411 | ||
2412 | static inline int bpf_link_prime(struct bpf_link *link, | |
2413 | struct bpf_link_primer *primer) | |
2414 | { | |
2415 | return -EOPNOTSUPP; | |
2416 | } | |
2417 | ||
2418 | static inline int bpf_link_settle(struct bpf_link_primer *primer) | |
2419 | { | |
2420 | return -EOPNOTSUPP; | |
2421 | } | |
2422 | ||
2423 | static inline void bpf_link_cleanup(struct bpf_link_primer *primer) | |
2424 | { | |
2425 | } | |
2426 | ||
2427 | static inline void bpf_link_inc(struct bpf_link *link) | |
2428 | { | |
2429 | } | |
2430 | ||
2431 | static inline void bpf_link_put(struct bpf_link *link) | |
2432 | { | |
2433 | } | |
2434 | ||
6e71b04a | 2435 | static inline int bpf_obj_get_user(const char __user *pathname, int flags) |
98589a09 SL |
2436 | { |
2437 | return -EOPNOTSUPP; | |
2438 | } | |
2439 | ||
1d233886 | 2440 | static inline void __dev_flush(void) |
46f55cff JF |
2441 | { |
2442 | } | |
9c270af3 | 2443 | |
d53ad5d8 | 2444 | struct xdp_frame; |
67f29e07 | 2445 | struct bpf_dtab_netdev; |
e6a4750f | 2446 | struct bpf_cpu_map_entry; |
67f29e07 | 2447 | |
1d233886 | 2448 | static inline |
d53ad5d8 | 2449 | int dev_xdp_enqueue(struct net_device *dev, struct xdp_frame *xdpf, |
1d233886 THJ |
2450 | struct net_device *dev_rx) |
2451 | { | |
2452 | return 0; | |
2453 | } | |
2454 | ||
67f29e07 | 2455 | static inline |
d53ad5d8 | 2456 | int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_frame *xdpf, |
38edddb8 | 2457 | struct net_device *dev_rx) |
67f29e07 JDB |
2458 | { |
2459 | return 0; | |
2460 | } | |
2461 | ||
e624d4ed | 2462 | static inline |
d53ad5d8 | 2463 | int dev_map_enqueue_multi(struct xdp_frame *xdpf, struct net_device *dev_rx, |
e624d4ed HL |
2464 | struct bpf_map *map, bool exclude_ingress) |
2465 | { | |
2466 | return 0; | |
2467 | } | |
2468 | ||
6d5fc195 TM |
2469 | struct sk_buff; |
2470 | ||
2471 | static inline int dev_map_generic_redirect(struct bpf_dtab_netdev *dst, | |
2472 | struct sk_buff *skb, | |
2473 | struct bpf_prog *xdp_prog) | |
2474 | { | |
2475 | return 0; | |
2476 | } | |
2477 | ||
e624d4ed HL |
2478 | static inline |
2479 | int dev_map_redirect_multi(struct net_device *dev, struct sk_buff *skb, | |
2480 | struct bpf_prog *xdp_prog, struct bpf_map *map, | |
2481 | bool exclude_ingress) | |
2482 | { | |
2483 | return 0; | |
2484 | } | |
2485 | ||
cdfafe98 | 2486 | static inline void __cpu_map_flush(void) |
9c270af3 JDB |
2487 | { |
2488 | } | |
2489 | ||
9c270af3 | 2490 | static inline int cpu_map_enqueue(struct bpf_cpu_map_entry *rcpu, |
d53ad5d8 | 2491 | struct xdp_frame *xdpf, |
9c270af3 JDB |
2492 | struct net_device *dev_rx) |
2493 | { | |
2494 | return 0; | |
2495 | } | |
040ee692 | 2496 | |
11941f8a KKD |
2497 | static inline int cpu_map_generic_redirect(struct bpf_cpu_map_entry *rcpu, |
2498 | struct sk_buff *skb) | |
2499 | { | |
2500 | return -EOPNOTSUPP; | |
2501 | } | |
2502 | ||
040ee692 AV |
2503 | static inline struct bpf_prog *bpf_prog_get_type_path(const char *name, |
2504 | enum bpf_prog_type type) | |
2505 | { | |
2506 | return ERR_PTR(-EOPNOTSUPP); | |
2507 | } | |
c695865c SF |
2508 | |
2509 | static inline int bpf_prog_test_run_xdp(struct bpf_prog *prog, | |
2510 | const union bpf_attr *kattr, | |
2511 | union bpf_attr __user *uattr) | |
2512 | { | |
2513 | return -ENOTSUPP; | |
2514 | } | |
2515 | ||
2516 | static inline int bpf_prog_test_run_skb(struct bpf_prog *prog, | |
2517 | const union bpf_attr *kattr, | |
2518 | union bpf_attr __user *uattr) | |
2519 | { | |
2520 | return -ENOTSUPP; | |
2521 | } | |
2522 | ||
da00d2f1 KS |
2523 | static inline int bpf_prog_test_run_tracing(struct bpf_prog *prog, |
2524 | const union bpf_attr *kattr, | |
2525 | union bpf_attr __user *uattr) | |
2526 | { | |
2527 | return -ENOTSUPP; | |
2528 | } | |
2529 | ||
c695865c SF |
2530 | static inline int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog, |
2531 | const union bpf_attr *kattr, | |
2532 | union bpf_attr __user *uattr) | |
2533 | { | |
2534 | return -ENOTSUPP; | |
2535 | } | |
6332be04 | 2536 | |
7c32e8f8 LB |
2537 | static inline int bpf_prog_test_run_sk_lookup(struct bpf_prog *prog, |
2538 | const union bpf_attr *kattr, | |
2539 | union bpf_attr __user *uattr) | |
2540 | { | |
2541 | return -ENOTSUPP; | |
2542 | } | |
2543 | ||
6332be04 DB |
2544 | static inline void bpf_map_put(struct bpf_map *map) |
2545 | { | |
2546 | } | |
7e6897f9 BT |
2547 | |
2548 | static inline struct bpf_prog *bpf_prog_by_id(u32 id) | |
2549 | { | |
2550 | return ERR_PTR(-ENOTSUPP); | |
2551 | } | |
6890896b | 2552 | |
d4f7bdb2 | 2553 | static inline int btf_struct_access(struct bpf_verifier_log *log, |
6728aea7 KKD |
2554 | const struct bpf_reg_state *reg, |
2555 | int off, int size, enum bpf_access_type atype, | |
63260df1 AS |
2556 | u32 *next_btf_id, enum bpf_type_flag *flag, |
2557 | const char **field_name) | |
d4f7bdb2 DX |
2558 | { |
2559 | return -EACCES; | |
2560 | } | |
2561 | ||
6890896b SF |
2562 | static inline const struct bpf_func_proto * |
2563 | bpf_base_func_proto(enum bpf_func_id func_id) | |
2564 | { | |
2565 | return NULL; | |
2566 | } | |
a10787e6 SL |
2567 | |
2568 | static inline void bpf_task_storage_free(struct task_struct *task) | |
2569 | { | |
2570 | } | |
e6ac2450 MKL |
2571 | |
2572 | static inline bool bpf_prog_has_kfunc_call(const struct bpf_prog *prog) | |
2573 | { | |
2574 | return false; | |
2575 | } | |
2576 | ||
2577 | static inline const struct btf_func_model * | |
2578 | bpf_jit_find_kfunc_model(const struct bpf_prog *prog, | |
2579 | const struct bpf_insn *insn) | |
2580 | { | |
2581 | return NULL; | |
2582 | } | |
44a3918c | 2583 | |
1cf3bfc6 IL |
2584 | static inline int |
2585 | bpf_get_kfunc_addr(const struct bpf_prog *prog, u32 func_id, | |
2586 | u16 btf_fd_idx, u8 **func_addr) | |
2587 | { | |
2588 | return -ENOTSUPP; | |
2589 | } | |
2590 | ||
44a3918c JP |
2591 | static inline bool unprivileged_ebpf_enabled(void) |
2592 | { | |
2593 | return false; | |
2594 | } | |
2595 | ||
24426654 MKL |
2596 | static inline bool has_current_bpf_ctx(void) |
2597 | { | |
2598 | return false; | |
2599 | } | |
05b24ff9 JO |
2600 | |
2601 | static inline void bpf_prog_inc_misses_counter(struct bpf_prog *prog) | |
2602 | { | |
2603 | } | |
c4bcfb38 YS |
2604 | |
2605 | static inline void bpf_cgrp_storage_free(struct cgroup *cgroup) | |
2606 | { | |
2607 | } | |
8357b366 JK |
2608 | |
2609 | static inline void bpf_dynptr_init(struct bpf_dynptr_kern *ptr, void *data, | |
2610 | enum bpf_dynptr_type type, u32 offset, u32 size) | |
2611 | { | |
2612 | } | |
2613 | ||
2614 | static inline void bpf_dynptr_set_null(struct bpf_dynptr_kern *ptr) | |
2615 | { | |
2616 | } | |
2617 | ||
2618 | static inline void bpf_dynptr_set_rdonly(struct bpf_dynptr_kern *ptr) | |
2619 | { | |
2620 | } | |
61e021f3 | 2621 | #endif /* CONFIG_BPF_SYSCALL */ |
09756af4 | 2622 | |
541c3bad AN |
2623 | void __bpf_free_used_btfs(struct bpf_prog_aux *aux, |
2624 | struct btf_mod_pair *used_btfs, u32 len); | |
2625 | ||
479321e9 JK |
2626 | static inline struct bpf_prog *bpf_prog_get_type(u32 ufd, |
2627 | enum bpf_prog_type type) | |
2628 | { | |
2629 | return bpf_prog_get_type_dev(ufd, type, false); | |
2630 | } | |
2631 | ||
936f8946 AN |
2632 | void __bpf_free_used_maps(struct bpf_prog_aux *aux, |
2633 | struct bpf_map **used_maps, u32 len); | |
2634 | ||
040ee692 AV |
2635 | bool bpf_prog_get_ok(struct bpf_prog *, enum bpf_prog_type *, bool); |
2636 | ||
ab3f0063 | 2637 | int bpf_prog_offload_compile(struct bpf_prog *prog); |
2b3486bc | 2638 | void bpf_prog_dev_bound_destroy(struct bpf_prog *prog); |
675fc275 JK |
2639 | int bpf_prog_offload_info_fill(struct bpf_prog_info *info, |
2640 | struct bpf_prog *prog); | |
ab3f0063 | 2641 | |
52775b33 JK |
2642 | int bpf_map_offload_info_fill(struct bpf_map_info *info, struct bpf_map *map); |
2643 | ||
a3884572 JK |
2644 | int bpf_map_offload_lookup_elem(struct bpf_map *map, void *key, void *value); |
2645 | int bpf_map_offload_update_elem(struct bpf_map *map, | |
2646 | void *key, void *value, u64 flags); | |
2647 | int bpf_map_offload_delete_elem(struct bpf_map *map, void *key); | |
2648 | int bpf_map_offload_get_next_key(struct bpf_map *map, | |
2649 | void *key, void *next_key); | |
2650 | ||
09728266 | 2651 | bool bpf_offload_prog_map_match(struct bpf_prog *prog, struct bpf_map *map); |
a3884572 | 2652 | |
1385d755 | 2653 | struct bpf_offload_dev * |
dd27c2e3 | 2654 | bpf_offload_dev_create(const struct bpf_prog_offload_ops *ops, void *priv); |
602144c2 | 2655 | void bpf_offload_dev_destroy(struct bpf_offload_dev *offdev); |
dd27c2e3 | 2656 | void *bpf_offload_dev_priv(struct bpf_offload_dev *offdev); |
602144c2 JK |
2657 | int bpf_offload_dev_netdev_register(struct bpf_offload_dev *offdev, |
2658 | struct net_device *netdev); | |
2659 | void bpf_offload_dev_netdev_unregister(struct bpf_offload_dev *offdev, | |
2660 | struct net_device *netdev); | |
fd4f227d | 2661 | bool bpf_offload_dev_match(struct bpf_prog *prog, struct net_device *netdev); |
9fd7c555 | 2662 | |
2147c438 JP |
2663 | void unpriv_ebpf_notify(int new_state); |
2664 | ||
ab3f0063 | 2665 | #if defined(CONFIG_NET) && defined(CONFIG_BPF_SYSCALL) |
3d76a4d3 SF |
2666 | int bpf_dev_bound_kfunc_check(struct bpf_verifier_log *log, |
2667 | struct bpf_prog_aux *prog_aux); | |
2668 | void *bpf_dev_bound_resolve_kfunc(struct bpf_prog *prog, u32 func_id); | |
2b3486bc | 2669 | int bpf_prog_dev_bound_init(struct bpf_prog *prog, union bpf_attr *attr); |
fd7c211d | 2670 | int bpf_prog_dev_bound_inherit(struct bpf_prog *new_prog, struct bpf_prog *old_prog); |
2b3486bc | 2671 | void bpf_dev_bound_netdev_unregister(struct net_device *dev); |
ab3f0063 | 2672 | |
0d830032 | 2673 | static inline bool bpf_prog_is_dev_bound(const struct bpf_prog_aux *aux) |
2b3486bc SF |
2674 | { |
2675 | return aux->dev_bound; | |
2676 | } | |
ab3f0063 | 2677 | |
9d03ebc7 | 2678 | static inline bool bpf_prog_is_offloaded(const struct bpf_prog_aux *aux) |
ab3f0063 | 2679 | { |
9a18eedb | 2680 | return aux->offload_requested; |
ab3f0063 | 2681 | } |
a3884572 | 2682 | |
fd7c211d THJ |
2683 | bool bpf_prog_dev_bound_match(const struct bpf_prog *lhs, const struct bpf_prog *rhs); |
2684 | ||
9d03ebc7 | 2685 | static inline bool bpf_map_is_offloaded(struct bpf_map *map) |
a3884572 JK |
2686 | { |
2687 | return unlikely(map->ops == &bpf_map_offload_ops); | |
2688 | } | |
2689 | ||
2690 | struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr); | |
2691 | void bpf_map_offload_map_free(struct bpf_map *map); | |
9629363c | 2692 | u64 bpf_map_offload_map_mem_usage(const struct bpf_map *map); |
79a7f8bd AS |
2693 | int bpf_prog_test_run_syscall(struct bpf_prog *prog, |
2694 | const union bpf_attr *kattr, | |
2695 | union bpf_attr __user *uattr); | |
17edea21 CW |
2696 | |
2697 | int sock_map_get_from_fd(const union bpf_attr *attr, struct bpf_prog *prog); | |
2698 | int sock_map_prog_detach(const union bpf_attr *attr, enum bpf_prog_type ptype); | |
2699 | int sock_map_update_elem_sys(struct bpf_map *map, void *key, void *value, u64 flags); | |
748cd572 DZ |
2700 | int sock_map_bpf_prog_query(const union bpf_attr *attr, |
2701 | union bpf_attr __user *uattr); | |
2702 | ||
17edea21 | 2703 | void sock_map_unhash(struct sock *sk); |
d8616ee2 | 2704 | void sock_map_destroy(struct sock *sk); |
17edea21 | 2705 | void sock_map_close(struct sock *sk, long timeout); |
ab3f0063 | 2706 | #else |
3d76a4d3 SF |
2707 | static inline int bpf_dev_bound_kfunc_check(struct bpf_verifier_log *log, |
2708 | struct bpf_prog_aux *prog_aux) | |
2709 | { | |
2710 | return -EOPNOTSUPP; | |
2711 | } | |
2712 | ||
2713 | static inline void *bpf_dev_bound_resolve_kfunc(struct bpf_prog *prog, | |
2714 | u32 func_id) | |
2715 | { | |
2716 | return NULL; | |
2717 | } | |
2718 | ||
2b3486bc | 2719 | static inline int bpf_prog_dev_bound_init(struct bpf_prog *prog, |
3d76a4d3 | 2720 | union bpf_attr *attr) |
ab3f0063 JK |
2721 | { |
2722 | return -EOPNOTSUPP; | |
2723 | } | |
2724 | ||
fd7c211d THJ |
2725 | static inline int bpf_prog_dev_bound_inherit(struct bpf_prog *new_prog, |
2726 | struct bpf_prog *old_prog) | |
2727 | { | |
2728 | return -EOPNOTSUPP; | |
2729 | } | |
2730 | ||
2b3486bc SF |
2731 | static inline void bpf_dev_bound_netdev_unregister(struct net_device *dev) |
2732 | { | |
2733 | } | |
2734 | ||
2735 | static inline bool bpf_prog_is_dev_bound(const struct bpf_prog_aux *aux) | |
2736 | { | |
2737 | return false; | |
2738 | } | |
2739 | ||
9d03ebc7 | 2740 | static inline bool bpf_prog_is_offloaded(struct bpf_prog_aux *aux) |
ab3f0063 JK |
2741 | { |
2742 | return false; | |
2743 | } | |
a3884572 | 2744 | |
fd7c211d | 2745 | static inline bool bpf_prog_dev_bound_match(const struct bpf_prog *lhs, const struct bpf_prog *rhs) |
ab3f0063 JK |
2746 | { |
2747 | return false; | |
2748 | } | |
a3884572 | 2749 | |
9d03ebc7 | 2750 | static inline bool bpf_map_is_offloaded(struct bpf_map *map) |
a3884572 JK |
2751 | { |
2752 | return false; | |
2753 | } | |
2754 | ||
2755 | static inline struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr) | |
2756 | { | |
2757 | return ERR_PTR(-EOPNOTSUPP); | |
2758 | } | |
2759 | ||
2760 | static inline void bpf_map_offload_map_free(struct bpf_map *map) | |
2761 | { | |
2762 | } | |
79a7f8bd | 2763 | |
9629363c YS |
2764 | static inline u64 bpf_map_offload_map_mem_usage(const struct bpf_map *map) |
2765 | { | |
2766 | return 0; | |
2767 | } | |
2768 | ||
79a7f8bd AS |
2769 | static inline int bpf_prog_test_run_syscall(struct bpf_prog *prog, |
2770 | const union bpf_attr *kattr, | |
2771 | union bpf_attr __user *uattr) | |
2772 | { | |
2773 | return -ENOTSUPP; | |
2774 | } | |
fdb5c453 | 2775 | |
88759609 | 2776 | #ifdef CONFIG_BPF_SYSCALL |
604326b4 DB |
2777 | static inline int sock_map_get_from_fd(const union bpf_attr *attr, |
2778 | struct bpf_prog *prog) | |
fdb5c453 SY |
2779 | { |
2780 | return -EINVAL; | |
2781 | } | |
bb0de313 LB |
2782 | |
2783 | static inline int sock_map_prog_detach(const union bpf_attr *attr, | |
2784 | enum bpf_prog_type ptype) | |
2785 | { | |
2786 | return -EOPNOTSUPP; | |
2787 | } | |
13b79d3f LB |
2788 | |
2789 | static inline int sock_map_update_elem_sys(struct bpf_map *map, void *key, void *value, | |
2790 | u64 flags) | |
2791 | { | |
2792 | return -EOPNOTSUPP; | |
2793 | } | |
748cd572 DZ |
2794 | |
2795 | static inline int sock_map_bpf_prog_query(const union bpf_attr *attr, | |
2796 | union bpf_attr __user *uattr) | |
2797 | { | |
2798 | return -EINVAL; | |
2799 | } | |
17edea21 CW |
2800 | #endif /* CONFIG_BPF_SYSCALL */ |
2801 | #endif /* CONFIG_NET && CONFIG_BPF_SYSCALL */ | |
5dc4c4b7 | 2802 | |
17edea21 CW |
2803 | #if defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL) |
2804 | void bpf_sk_reuseport_detach(struct sock *sk); | |
2805 | int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map, void *key, | |
2806 | void *value); | |
2807 | int bpf_fd_reuseport_array_update_elem(struct bpf_map *map, void *key, | |
2808 | void *value, u64 map_flags); | |
2809 | #else | |
2810 | static inline void bpf_sk_reuseport_detach(struct sock *sk) | |
2811 | { | |
2812 | } | |
5dc4c4b7 | 2813 | |
17edea21 | 2814 | #ifdef CONFIG_BPF_SYSCALL |
5dc4c4b7 MKL |
2815 | static inline int bpf_fd_reuseport_array_lookup_elem(struct bpf_map *map, |
2816 | void *key, void *value) | |
2817 | { | |
2818 | return -EOPNOTSUPP; | |
2819 | } | |
2820 | ||
2821 | static inline int bpf_fd_reuseport_array_update_elem(struct bpf_map *map, | |
2822 | void *key, void *value, | |
2823 | u64 map_flags) | |
2824 | { | |
2825 | return -EOPNOTSUPP; | |
2826 | } | |
2827 | #endif /* CONFIG_BPF_SYSCALL */ | |
2828 | #endif /* defined(CONFIG_INET) && defined(CONFIG_BPF_SYSCALL) */ | |
2829 | ||
d0003ec0 | 2830 | /* verifier prototypes for helper functions called from eBPF programs */ |
a2c83fff DB |
2831 | extern const struct bpf_func_proto bpf_map_lookup_elem_proto; |
2832 | extern const struct bpf_func_proto bpf_map_update_elem_proto; | |
2833 | extern const struct bpf_func_proto bpf_map_delete_elem_proto; | |
f1a2e44a MV |
2834 | extern const struct bpf_func_proto bpf_map_push_elem_proto; |
2835 | extern const struct bpf_func_proto bpf_map_pop_elem_proto; | |
2836 | extern const struct bpf_func_proto bpf_map_peek_elem_proto; | |
07343110 | 2837 | extern const struct bpf_func_proto bpf_map_lookup_percpu_elem_proto; |
d0003ec0 | 2838 | |
03e69b50 | 2839 | extern const struct bpf_func_proto bpf_get_prandom_u32_proto; |
c04167ce | 2840 | extern const struct bpf_func_proto bpf_get_smp_processor_id_proto; |
2d0e30c3 | 2841 | extern const struct bpf_func_proto bpf_get_numa_node_id_proto; |
04fd61ab | 2842 | extern const struct bpf_func_proto bpf_tail_call_proto; |
17ca8cbf | 2843 | extern const struct bpf_func_proto bpf_ktime_get_ns_proto; |
71d19214 | 2844 | extern const struct bpf_func_proto bpf_ktime_get_boot_ns_proto; |
c8996c98 | 2845 | extern const struct bpf_func_proto bpf_ktime_get_tai_ns_proto; |
ffeedafb AS |
2846 | extern const struct bpf_func_proto bpf_get_current_pid_tgid_proto; |
2847 | extern const struct bpf_func_proto bpf_get_current_uid_gid_proto; | |
2848 | extern const struct bpf_func_proto bpf_get_current_comm_proto; | |
d5a3b1f6 | 2849 | extern const struct bpf_func_proto bpf_get_stackid_proto; |
c195651e | 2850 | extern const struct bpf_func_proto bpf_get_stack_proto; |
fa28dcb8 | 2851 | extern const struct bpf_func_proto bpf_get_task_stack_proto; |
7b04d6d6 SL |
2852 | extern const struct bpf_func_proto bpf_get_stackid_proto_pe; |
2853 | extern const struct bpf_func_proto bpf_get_stack_proto_pe; | |
174a79ff | 2854 | extern const struct bpf_func_proto bpf_sock_map_update_proto; |
81110384 | 2855 | extern const struct bpf_func_proto bpf_sock_hash_update_proto; |
bf6fa2c8 | 2856 | extern const struct bpf_func_proto bpf_get_current_cgroup_id_proto; |
0f09abd1 | 2857 | extern const struct bpf_func_proto bpf_get_current_ancestor_cgroup_id_proto; |
bed89185 | 2858 | extern const struct bpf_func_proto bpf_get_cgroup_classid_curr_proto; |
604326b4 DB |
2859 | extern const struct bpf_func_proto bpf_msg_redirect_hash_proto; |
2860 | extern const struct bpf_func_proto bpf_msg_redirect_map_proto; | |
2861 | extern const struct bpf_func_proto bpf_sk_redirect_hash_proto; | |
2862 | extern const struct bpf_func_proto bpf_sk_redirect_map_proto; | |
d83525ca AS |
2863 | extern const struct bpf_func_proto bpf_spin_lock_proto; |
2864 | extern const struct bpf_func_proto bpf_spin_unlock_proto; | |
cd339431 | 2865 | extern const struct bpf_func_proto bpf_get_local_storage_proto; |
d7a4cb9b AI |
2866 | extern const struct bpf_func_proto bpf_strtol_proto; |
2867 | extern const struct bpf_func_proto bpf_strtoul_proto; | |
0d01da6a | 2868 | extern const struct bpf_func_proto bpf_tcp_sock_proto; |
5576b991 | 2869 | extern const struct bpf_func_proto bpf_jiffies64_proto; |
b4490c5c | 2870 | extern const struct bpf_func_proto bpf_get_ns_current_pid_tgid_proto; |
0456ea17 | 2871 | extern const struct bpf_func_proto bpf_event_output_data_proto; |
457f4436 AN |
2872 | extern const struct bpf_func_proto bpf_ringbuf_output_proto; |
2873 | extern const struct bpf_func_proto bpf_ringbuf_reserve_proto; | |
2874 | extern const struct bpf_func_proto bpf_ringbuf_submit_proto; | |
2875 | extern const struct bpf_func_proto bpf_ringbuf_discard_proto; | |
2876 | extern const struct bpf_func_proto bpf_ringbuf_query_proto; | |
bc34dee6 JK |
2877 | extern const struct bpf_func_proto bpf_ringbuf_reserve_dynptr_proto; |
2878 | extern const struct bpf_func_proto bpf_ringbuf_submit_dynptr_proto; | |
2879 | extern const struct bpf_func_proto bpf_ringbuf_discard_dynptr_proto; | |
af7ec138 | 2880 | extern const struct bpf_func_proto bpf_skc_to_tcp6_sock_proto; |
478cfbdf YS |
2881 | extern const struct bpf_func_proto bpf_skc_to_tcp_sock_proto; |
2882 | extern const struct bpf_func_proto bpf_skc_to_tcp_timewait_sock_proto; | |
2883 | extern const struct bpf_func_proto bpf_skc_to_tcp_request_sock_proto; | |
0d4fad3e | 2884 | extern const struct bpf_func_proto bpf_skc_to_udp6_sock_proto; |
9eeb3aa3 | 2885 | extern const struct bpf_func_proto bpf_skc_to_unix_sock_proto; |
3bc253c2 | 2886 | extern const struct bpf_func_proto bpf_skc_to_mptcp_sock_proto; |
07be4c4a | 2887 | extern const struct bpf_func_proto bpf_copy_from_user_proto; |
c4d0bfb4 | 2888 | extern const struct bpf_func_proto bpf_snprintf_btf_proto; |
7b15523a | 2889 | extern const struct bpf_func_proto bpf_snprintf_proto; |
eaa6bcb7 | 2890 | extern const struct bpf_func_proto bpf_per_cpu_ptr_proto; |
63d9b80d | 2891 | extern const struct bpf_func_proto bpf_this_cpu_ptr_proto; |
d0551261 | 2892 | extern const struct bpf_func_proto bpf_ktime_get_coarse_ns_proto; |
b60da495 | 2893 | extern const struct bpf_func_proto bpf_sock_from_file_proto; |
c5dbb89f | 2894 | extern const struct bpf_func_proto bpf_get_socket_ptr_cookie_proto; |
0593dd34 | 2895 | extern const struct bpf_func_proto bpf_task_storage_get_recur_proto; |
a10787e6 | 2896 | extern const struct bpf_func_proto bpf_task_storage_get_proto; |
0593dd34 | 2897 | extern const struct bpf_func_proto bpf_task_storage_delete_recur_proto; |
a10787e6 | 2898 | extern const struct bpf_func_proto bpf_task_storage_delete_proto; |
69c087ba | 2899 | extern const struct bpf_func_proto bpf_for_each_map_elem_proto; |
3d78417b | 2900 | extern const struct bpf_func_proto bpf_btf_find_by_name_kind_proto; |
3cee6fb8 MKL |
2901 | extern const struct bpf_func_proto bpf_sk_setsockopt_proto; |
2902 | extern const struct bpf_func_proto bpf_sk_getsockopt_proto; | |
9113d7e4 SF |
2903 | extern const struct bpf_func_proto bpf_unlocked_sk_setsockopt_proto; |
2904 | extern const struct bpf_func_proto bpf_unlocked_sk_getsockopt_proto; | |
7c7e3d31 | 2905 | extern const struct bpf_func_proto bpf_find_vma_proto; |
e6f2dd0f | 2906 | extern const struct bpf_func_proto bpf_loop_proto; |
376040e4 | 2907 | extern const struct bpf_func_proto bpf_copy_from_user_task_proto; |
69fd337a SF |
2908 | extern const struct bpf_func_proto bpf_set_retval_proto; |
2909 | extern const struct bpf_func_proto bpf_get_retval_proto; | |
20571567 | 2910 | extern const struct bpf_func_proto bpf_user_ringbuf_drain_proto; |
c4bcfb38 YS |
2911 | extern const struct bpf_func_proto bpf_cgrp_storage_get_proto; |
2912 | extern const struct bpf_func_proto bpf_cgrp_storage_delete_proto; | |
cd339431 | 2913 | |
958a3f2d JO |
2914 | const struct bpf_func_proto *tracing_prog_func_proto( |
2915 | enum bpf_func_id func_id, const struct bpf_prog *prog); | |
2916 | ||
3ad00405 DB |
2917 | /* Shared helpers among cBPF and eBPF. */ |
2918 | void bpf_user_rnd_init_once(void); | |
2919 | u64 bpf_user_rnd_u32(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5); | |
6890896b | 2920 | u64 bpf_get_raw_cpu_id(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5); |
3ad00405 | 2921 | |
c64b7983 | 2922 | #if defined(CONFIG_NET) |
46f8bc92 MKL |
2923 | bool bpf_sock_common_is_valid_access(int off, int size, |
2924 | enum bpf_access_type type, | |
2925 | struct bpf_insn_access_aux *info); | |
c64b7983 JS |
2926 | bool bpf_sock_is_valid_access(int off, int size, enum bpf_access_type type, |
2927 | struct bpf_insn_access_aux *info); | |
2928 | u32 bpf_sock_convert_ctx_access(enum bpf_access_type type, | |
2929 | const struct bpf_insn *si, | |
2930 | struct bpf_insn *insn_buf, | |
2931 | struct bpf_prog *prog, | |
2932 | u32 *target_size); | |
b5964b96 JK |
2933 | int bpf_dynptr_from_skb_rdonly(struct sk_buff *skb, u64 flags, |
2934 | struct bpf_dynptr_kern *ptr); | |
c64b7983 | 2935 | #else |
46f8bc92 MKL |
2936 | static inline bool bpf_sock_common_is_valid_access(int off, int size, |
2937 | enum bpf_access_type type, | |
2938 | struct bpf_insn_access_aux *info) | |
2939 | { | |
2940 | return false; | |
2941 | } | |
c64b7983 JS |
2942 | static inline bool bpf_sock_is_valid_access(int off, int size, |
2943 | enum bpf_access_type type, | |
2944 | struct bpf_insn_access_aux *info) | |
2945 | { | |
2946 | return false; | |
2947 | } | |
2948 | static inline u32 bpf_sock_convert_ctx_access(enum bpf_access_type type, | |
2949 | const struct bpf_insn *si, | |
2950 | struct bpf_insn *insn_buf, | |
2951 | struct bpf_prog *prog, | |
2952 | u32 *target_size) | |
2953 | { | |
2954 | return 0; | |
2955 | } | |
b5964b96 JK |
2956 | static inline int bpf_dynptr_from_skb_rdonly(struct sk_buff *skb, u64 flags, |
2957 | struct bpf_dynptr_kern *ptr) | |
2958 | { | |
2959 | return -EOPNOTSUPP; | |
2960 | } | |
c64b7983 JS |
2961 | #endif |
2962 | ||
655a51e5 | 2963 | #ifdef CONFIG_INET |
91cc1a99 AS |
2964 | struct sk_reuseport_kern { |
2965 | struct sk_buff *skb; | |
2966 | struct sock *sk; | |
2967 | struct sock *selected_sk; | |
d5e4ddae | 2968 | struct sock *migrating_sk; |
91cc1a99 AS |
2969 | void *data_end; |
2970 | u32 hash; | |
2971 | u32 reuseport_id; | |
2972 | bool bind_inany; | |
2973 | }; | |
655a51e5 MKL |
2974 | bool bpf_tcp_sock_is_valid_access(int off, int size, enum bpf_access_type type, |
2975 | struct bpf_insn_access_aux *info); | |
2976 | ||
2977 | u32 bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type, | |
2978 | const struct bpf_insn *si, | |
2979 | struct bpf_insn *insn_buf, | |
2980 | struct bpf_prog *prog, | |
2981 | u32 *target_size); | |
7f94208c Y |
2982 | |
2983 | bool bpf_xdp_sock_is_valid_access(int off, int size, enum bpf_access_type type, | |
2984 | struct bpf_insn_access_aux *info); | |
2985 | ||
2986 | u32 bpf_xdp_sock_convert_ctx_access(enum bpf_access_type type, | |
2987 | const struct bpf_insn *si, | |
2988 | struct bpf_insn *insn_buf, | |
2989 | struct bpf_prog *prog, | |
2990 | u32 *target_size); | |
655a51e5 MKL |
2991 | #else |
2992 | static inline bool bpf_tcp_sock_is_valid_access(int off, int size, | |
2993 | enum bpf_access_type type, | |
2994 | struct bpf_insn_access_aux *info) | |
2995 | { | |
2996 | return false; | |
2997 | } | |
2998 | ||
2999 | static inline u32 bpf_tcp_sock_convert_ctx_access(enum bpf_access_type type, | |
3000 | const struct bpf_insn *si, | |
3001 | struct bpf_insn *insn_buf, | |
3002 | struct bpf_prog *prog, | |
3003 | u32 *target_size) | |
3004 | { | |
3005 | return 0; | |
3006 | } | |
7f94208c Y |
3007 | static inline bool bpf_xdp_sock_is_valid_access(int off, int size, |
3008 | enum bpf_access_type type, | |
3009 | struct bpf_insn_access_aux *info) | |
3010 | { | |
3011 | return false; | |
3012 | } | |
3013 | ||
3014 | static inline u32 bpf_xdp_sock_convert_ctx_access(enum bpf_access_type type, | |
3015 | const struct bpf_insn *si, | |
3016 | struct bpf_insn *insn_buf, | |
3017 | struct bpf_prog *prog, | |
3018 | u32 *target_size) | |
3019 | { | |
3020 | return 0; | |
3021 | } | |
655a51e5 MKL |
3022 | #endif /* CONFIG_INET */ |
3023 | ||
5964b200 | 3024 | enum bpf_text_poke_type { |
b553a6ec DB |
3025 | BPF_MOD_CALL, |
3026 | BPF_MOD_JUMP, | |
5964b200 | 3027 | }; |
4b3da77b | 3028 | |
5964b200 AS |
3029 | int bpf_arch_text_poke(void *ip, enum bpf_text_poke_type t, |
3030 | void *addr1, void *addr2); | |
3031 | ||
ebc1415d | 3032 | void *bpf_arch_text_copy(void *dst, void *src, size_t len); |
fe736565 | 3033 | int bpf_arch_text_invalidate(void *dst, size_t len); |
ebc1415d | 3034 | |
eae2e83e | 3035 | struct btf_id_set; |
2af30f11 | 3036 | bool btf_id_set_contains(const struct btf_id_set *set, u32 id); |
eae2e83e | 3037 | |
335ff499 | 3038 | #define MAX_BPRINTF_VARARGS 12 |
e2bb9e01 | 3039 | #define MAX_BPRINTF_BUF 1024 |
335ff499 | 3040 | |
78aa1cc9 JO |
3041 | struct bpf_bprintf_data { |
3042 | u32 *bin_args; | |
e2bb9e01 | 3043 | char *buf; |
78aa1cc9 | 3044 | bool get_bin_args; |
e2bb9e01 | 3045 | bool get_buf; |
78aa1cc9 JO |
3046 | }; |
3047 | ||
48cac3f4 | 3048 | int bpf_bprintf_prepare(char *fmt, u32 fmt_size, const u64 *raw_args, |
78aa1cc9 | 3049 | u32 num_args, struct bpf_bprintf_data *data); |
f19a4050 | 3050 | void bpf_bprintf_cleanup(struct bpf_bprintf_data *data); |
d9c9e4db | 3051 | |
c0e19f2c SF |
3052 | #ifdef CONFIG_BPF_LSM |
3053 | void bpf_cgroup_atype_get(u32 attach_btf_id, int cgroup_atype); | |
3054 | void bpf_cgroup_atype_put(int cgroup_atype); | |
3055 | #else | |
3056 | static inline void bpf_cgroup_atype_get(u32 attach_btf_id, int cgroup_atype) {} | |
3057 | static inline void bpf_cgroup_atype_put(int cgroup_atype) {} | |
3058 | #endif /* CONFIG_BPF_LSM */ | |
3059 | ||
f3cf4134 RS |
3060 | struct key; |
3061 | ||
3062 | #ifdef CONFIG_KEYS | |
3063 | struct bpf_key { | |
3064 | struct key *key; | |
3065 | bool has_ref; | |
3066 | }; | |
3067 | #endif /* CONFIG_KEYS */ | |
282de143 KKD |
3068 | |
3069 | static inline bool type_is_alloc(u32 type) | |
3070 | { | |
3071 | return type & MEM_ALLOC; | |
3072 | } | |
3073 | ||
ee53cbfb YS |
3074 | static inline gfp_t bpf_memcg_flags(gfp_t flags) |
3075 | { | |
3076 | if (memcg_bpf_enabled()) | |
3077 | return flags | __GFP_ACCOUNT; | |
3078 | return flags; | |
3079 | } | |
3080 | ||
99c55f7d | 3081 | #endif /* _LINUX_BPF_H */ |