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604326b4 DB |
1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | /* Copyright (c) 2017 - 2018 Covalent IO, Inc. http://covalent.io */ | |
3 | ||
4 | #ifndef _LINUX_SKMSG_H | |
5 | #define _LINUX_SKMSG_H | |
6 | ||
7 | #include <linux/bpf.h> | |
8 | #include <linux/filter.h> | |
9 | #include <linux/scatterlist.h> | |
10 | #include <linux/skbuff.h> | |
11 | ||
12 | #include <net/sock.h> | |
13 | #include <net/tcp.h> | |
14 | #include <net/strparser.h> | |
15 | ||
16 | #define MAX_MSG_FRAGS MAX_SKB_FRAGS | |
031097d9 | 17 | #define NR_MSG_FRAG_IDS (MAX_MSG_FRAGS + 1) |
604326b4 DB |
18 | |
19 | enum __sk_action { | |
20 | __SK_DROP = 0, | |
21 | __SK_PASS, | |
22 | __SK_REDIRECT, | |
23 | __SK_NONE, | |
24 | }; | |
25 | ||
26 | struct sk_msg_sg { | |
27 | u32 start; | |
28 | u32 curr; | |
29 | u32 end; | |
30 | u32 size; | |
31 | u32 copybreak; | |
163ab96b | 32 | unsigned long copy; |
031097d9 JK |
33 | /* The extra two elements: |
34 | * 1) used for chaining the front and sections when the list becomes | |
35 | * partitioned (e.g. end < start). The crypto APIs require the | |
36 | * chaining; | |
37 | * 2) to chain tailer SG entries after the message. | |
d3b18ad3 | 38 | */ |
031097d9 | 39 | struct scatterlist data[MAX_MSG_FRAGS + 2]; |
604326b4 | 40 | }; |
031097d9 | 41 | static_assert(BITS_PER_LONG >= NR_MSG_FRAG_IDS); |
604326b4 | 42 | |
7a69c0f2 | 43 | /* UAPI in filter.c depends on struct sk_msg_sg being first element. */ |
604326b4 DB |
44 | struct sk_msg { |
45 | struct sk_msg_sg sg; | |
46 | void *data; | |
47 | void *data_end; | |
48 | u32 apply_bytes; | |
49 | u32 cork_bytes; | |
50 | u32 flags; | |
51 | struct sk_buff *skb; | |
52 | struct sock *sk_redir; | |
53 | struct sock *sk; | |
54 | struct list_head list; | |
55 | }; | |
56 | ||
57 | struct sk_psock_progs { | |
58 | struct bpf_prog *msg_parser; | |
ae8b8332 CW |
59 | struct bpf_prog *stream_parser; |
60 | struct bpf_prog *stream_verdict; | |
a7ba4558 | 61 | struct bpf_prog *skb_verdict; |
604326b4 DB |
62 | }; |
63 | ||
64 | enum sk_psock_state_bits { | |
65 | SK_PSOCK_TX_ENABLED, | |
66 | }; | |
67 | ||
68 | struct sk_psock_link { | |
69 | struct list_head list; | |
70 | struct bpf_map *map; | |
71 | void *link_raw; | |
72 | }; | |
73 | ||
604326b4 DB |
74 | struct sk_psock_work_state { |
75 | struct sk_buff *skb; | |
76 | u32 len; | |
77 | u32 off; | |
78 | }; | |
79 | ||
80 | struct sk_psock { | |
81 | struct sock *sk; | |
82 | struct sock *sk_redir; | |
83 | u32 apply_bytes; | |
84 | u32 cork_bytes; | |
85 | u32 eval; | |
86 | struct sk_msg *cork; | |
87 | struct sk_psock_progs progs; | |
5a685cd9 CW |
88 | #if IS_ENABLED(CONFIG_BPF_STREAM_PARSER) |
89 | struct strparser strp; | |
90 | #endif | |
604326b4 DB |
91 | struct sk_buff_head ingress_skb; |
92 | struct list_head ingress_msg; | |
b01fd6e8 | 93 | spinlock_t ingress_lock; |
604326b4 DB |
94 | unsigned long state; |
95 | struct list_head link; | |
96 | spinlock_t link_lock; | |
97 | refcount_t refcnt; | |
98 | void (*saved_unhash)(struct sock *sk); | |
99 | void (*saved_close)(struct sock *sk, long timeout); | |
100 | void (*saved_write_space)(struct sock *sk); | |
5a685cd9 | 101 | void (*saved_data_ready)(struct sock *sk); |
51e0158a CW |
102 | int (*psock_update_sk_prot)(struct sock *sk, struct sk_psock *psock, |
103 | bool restore); | |
604326b4 | 104 | struct proto *sk_proto; |
799aa7f9 | 105 | struct mutex work_mutex; |
604326b4 DB |
106 | struct sk_psock_work_state work_state; |
107 | struct work_struct work; | |
7786dfc4 | 108 | struct rcu_work rwork; |
604326b4 DB |
109 | }; |
110 | ||
111 | int sk_msg_alloc(struct sock *sk, struct sk_msg *msg, int len, | |
112 | int elem_first_coalesce); | |
d829e9c4 DB |
113 | int sk_msg_clone(struct sock *sk, struct sk_msg *dst, struct sk_msg *src, |
114 | u32 off, u32 len); | |
604326b4 DB |
115 | void sk_msg_trim(struct sock *sk, struct sk_msg *msg, int len); |
116 | int sk_msg_free(struct sock *sk, struct sk_msg *msg); | |
117 | int sk_msg_free_nocharge(struct sock *sk, struct sk_msg *msg); | |
118 | void sk_msg_free_partial(struct sock *sk, struct sk_msg *msg, u32 bytes); | |
119 | void sk_msg_free_partial_nocharge(struct sock *sk, struct sk_msg *msg, | |
120 | u32 bytes); | |
121 | ||
122 | void sk_msg_return(struct sock *sk, struct sk_msg *msg, int bytes); | |
d3b18ad3 | 123 | void sk_msg_return_zero(struct sock *sk, struct sk_msg *msg, int bytes); |
604326b4 DB |
124 | |
125 | int sk_msg_zerocopy_from_iter(struct sock *sk, struct iov_iter *from, | |
126 | struct sk_msg *msg, u32 bytes); | |
127 | int sk_msg_memcopy_from_iter(struct sock *sk, struct iov_iter *from, | |
128 | struct sk_msg *msg, u32 bytes); | |
2bc793e3 CW |
129 | int sk_msg_recvmsg(struct sock *sk, struct sk_psock *psock, struct msghdr *msg, |
130 | int len, int flags); | |
604326b4 DB |
131 | |
132 | static inline void sk_msg_check_to_free(struct sk_msg *msg, u32 i, u32 bytes) | |
133 | { | |
134 | WARN_ON(i == msg->sg.end && bytes); | |
135 | } | |
136 | ||
137 | static inline void sk_msg_apply_bytes(struct sk_psock *psock, u32 bytes) | |
138 | { | |
139 | if (psock->apply_bytes) { | |
140 | if (psock->apply_bytes < bytes) | |
141 | psock->apply_bytes = 0; | |
142 | else | |
143 | psock->apply_bytes -= bytes; | |
144 | } | |
145 | } | |
146 | ||
683916f6 JK |
147 | static inline u32 sk_msg_iter_dist(u32 start, u32 end) |
148 | { | |
031097d9 | 149 | return end >= start ? end - start : end + (NR_MSG_FRAG_IDS - start); |
683916f6 JK |
150 | } |
151 | ||
604326b4 DB |
152 | #define sk_msg_iter_var_prev(var) \ |
153 | do { \ | |
154 | if (var == 0) \ | |
031097d9 | 155 | var = NR_MSG_FRAG_IDS - 1; \ |
604326b4 DB |
156 | else \ |
157 | var--; \ | |
158 | } while (0) | |
159 | ||
160 | #define sk_msg_iter_var_next(var) \ | |
161 | do { \ | |
162 | var++; \ | |
031097d9 | 163 | if (var == NR_MSG_FRAG_IDS) \ |
604326b4 DB |
164 | var = 0; \ |
165 | } while (0) | |
166 | ||
167 | #define sk_msg_iter_prev(msg, which) \ | |
168 | sk_msg_iter_var_prev(msg->sg.which) | |
169 | ||
170 | #define sk_msg_iter_next(msg, which) \ | |
171 | sk_msg_iter_var_next(msg->sg.which) | |
172 | ||
173 | static inline void sk_msg_clear_meta(struct sk_msg *msg) | |
174 | { | |
175 | memset(&msg->sg, 0, offsetofend(struct sk_msg_sg, copy)); | |
176 | } | |
177 | ||
178 | static inline void sk_msg_init(struct sk_msg *msg) | |
179 | { | |
031097d9 | 180 | BUILD_BUG_ON(ARRAY_SIZE(msg->sg.data) - 1 != NR_MSG_FRAG_IDS); |
604326b4 | 181 | memset(msg, 0, sizeof(*msg)); |
031097d9 | 182 | sg_init_marker(msg->sg.data, NR_MSG_FRAG_IDS); |
604326b4 DB |
183 | } |
184 | ||
185 | static inline void sk_msg_xfer(struct sk_msg *dst, struct sk_msg *src, | |
186 | int which, u32 size) | |
187 | { | |
188 | dst->sg.data[which] = src->sg.data[which]; | |
189 | dst->sg.data[which].length = size; | |
3f4c3127 | 190 | dst->sg.size += size; |
81aabbb9 | 191 | src->sg.size -= size; |
604326b4 DB |
192 | src->sg.data[which].length -= size; |
193 | src->sg.data[which].offset += size; | |
194 | } | |
195 | ||
d3b18ad3 JF |
196 | static inline void sk_msg_xfer_full(struct sk_msg *dst, struct sk_msg *src) |
197 | { | |
198 | memcpy(dst, src, sizeof(*src)); | |
199 | sk_msg_init(src); | |
200 | } | |
201 | ||
8734a162 JF |
202 | static inline bool sk_msg_full(const struct sk_msg *msg) |
203 | { | |
031097d9 | 204 | return sk_msg_iter_dist(msg->sg.start, msg->sg.end) == MAX_MSG_FRAGS; |
8734a162 JF |
205 | } |
206 | ||
604326b4 DB |
207 | static inline u32 sk_msg_elem_used(const struct sk_msg *msg) |
208 | { | |
683916f6 | 209 | return sk_msg_iter_dist(msg->sg.start, msg->sg.end); |
604326b4 DB |
210 | } |
211 | ||
604326b4 DB |
212 | static inline struct scatterlist *sk_msg_elem(struct sk_msg *msg, int which) |
213 | { | |
214 | return &msg->sg.data[which]; | |
215 | } | |
216 | ||
6fff607e JF |
217 | static inline struct scatterlist sk_msg_elem_cpy(struct sk_msg *msg, int which) |
218 | { | |
219 | return msg->sg.data[which]; | |
220 | } | |
221 | ||
604326b4 DB |
222 | static inline struct page *sk_msg_page(struct sk_msg *msg, int which) |
223 | { | |
224 | return sg_page(sk_msg_elem(msg, which)); | |
225 | } | |
226 | ||
227 | static inline bool sk_msg_to_ingress(const struct sk_msg *msg) | |
228 | { | |
229 | return msg->flags & BPF_F_INGRESS; | |
230 | } | |
231 | ||
232 | static inline void sk_msg_compute_data_pointers(struct sk_msg *msg) | |
233 | { | |
234 | struct scatterlist *sge = sk_msg_elem(msg, msg->sg.start); | |
235 | ||
163ab96b | 236 | if (test_bit(msg->sg.start, &msg->sg.copy)) { |
604326b4 DB |
237 | msg->data = NULL; |
238 | msg->data_end = NULL; | |
239 | } else { | |
240 | msg->data = sg_virt(sge); | |
241 | msg->data_end = msg->data + sge->length; | |
242 | } | |
243 | } | |
244 | ||
245 | static inline void sk_msg_page_add(struct sk_msg *msg, struct page *page, | |
246 | u32 len, u32 offset) | |
247 | { | |
248 | struct scatterlist *sge; | |
249 | ||
250 | get_page(page); | |
251 | sge = sk_msg_elem(msg, msg->sg.end); | |
252 | sg_set_page(sge, page, len, offset); | |
253 | sg_unmark_end(sge); | |
254 | ||
163ab96b | 255 | __set_bit(msg->sg.end, &msg->sg.copy); |
604326b4 DB |
256 | msg->sg.size += len; |
257 | sk_msg_iter_next(msg, end); | |
258 | } | |
259 | ||
d3b18ad3 JF |
260 | static inline void sk_msg_sg_copy(struct sk_msg *msg, u32 i, bool copy_state) |
261 | { | |
262 | do { | |
163ab96b JK |
263 | if (copy_state) |
264 | __set_bit(i, &msg->sg.copy); | |
265 | else | |
266 | __clear_bit(i, &msg->sg.copy); | |
d3b18ad3 JF |
267 | sk_msg_iter_var_next(i); |
268 | if (i == msg->sg.end) | |
269 | break; | |
270 | } while (1); | |
271 | } | |
272 | ||
273 | static inline void sk_msg_sg_copy_set(struct sk_msg *msg, u32 start) | |
274 | { | |
275 | sk_msg_sg_copy(msg, start, true); | |
276 | } | |
277 | ||
278 | static inline void sk_msg_sg_copy_clear(struct sk_msg *msg, u32 start) | |
279 | { | |
280 | sk_msg_sg_copy(msg, start, false); | |
281 | } | |
282 | ||
604326b4 DB |
283 | static inline struct sk_psock *sk_psock(const struct sock *sk) |
284 | { | |
285 | return rcu_dereference_sk_user_data(sk); | |
286 | } | |
287 | ||
9635720b JF |
288 | static inline void sk_psock_set_state(struct sk_psock *psock, |
289 | enum sk_psock_state_bits bit) | |
290 | { | |
291 | set_bit(bit, &psock->state); | |
292 | } | |
293 | ||
294 | static inline void sk_psock_clear_state(struct sk_psock *psock, | |
295 | enum sk_psock_state_bits bit) | |
296 | { | |
297 | clear_bit(bit, &psock->state); | |
298 | } | |
299 | ||
300 | static inline bool sk_psock_test_state(const struct sk_psock *psock, | |
301 | enum sk_psock_state_bits bit) | |
302 | { | |
303 | return test_bit(bit, &psock->state); | |
304 | } | |
305 | ||
306 | static inline void sock_drop(struct sock *sk, struct sk_buff *skb) | |
307 | { | |
308 | sk_drops_add(sk, skb); | |
309 | kfree_skb(skb); | |
310 | } | |
311 | ||
312 | static inline void drop_sk_msg(struct sk_psock *psock, struct sk_msg *msg) | |
313 | { | |
314 | if (msg->skb) | |
315 | sock_drop(psock->sk, msg->skb); | |
316 | kfree(msg); | |
317 | } | |
318 | ||
604326b4 DB |
319 | static inline void sk_psock_queue_msg(struct sk_psock *psock, |
320 | struct sk_msg *msg) | |
321 | { | |
b01fd6e8 | 322 | spin_lock_bh(&psock->ingress_lock); |
9635720b JF |
323 | if (sk_psock_test_state(psock, SK_PSOCK_TX_ENABLED)) |
324 | list_add_tail(&msg->list, &psock->ingress_msg); | |
325 | else | |
326 | drop_sk_msg(psock, msg); | |
b01fd6e8 CW |
327 | spin_unlock_bh(&psock->ingress_lock); |
328 | } | |
329 | ||
330 | static inline struct sk_msg *sk_psock_dequeue_msg(struct sk_psock *psock) | |
331 | { | |
332 | struct sk_msg *msg; | |
333 | ||
334 | spin_lock_bh(&psock->ingress_lock); | |
335 | msg = list_first_entry_or_null(&psock->ingress_msg, struct sk_msg, list); | |
336 | if (msg) | |
337 | list_del(&msg->list); | |
338 | spin_unlock_bh(&psock->ingress_lock); | |
339 | return msg; | |
340 | } | |
341 | ||
342 | static inline struct sk_msg *sk_psock_peek_msg(struct sk_psock *psock) | |
343 | { | |
344 | struct sk_msg *msg; | |
345 | ||
346 | spin_lock_bh(&psock->ingress_lock); | |
347 | msg = list_first_entry_or_null(&psock->ingress_msg, struct sk_msg, list); | |
348 | spin_unlock_bh(&psock->ingress_lock); | |
349 | return msg; | |
350 | } | |
351 | ||
352 | static inline struct sk_msg *sk_psock_next_msg(struct sk_psock *psock, | |
353 | struct sk_msg *msg) | |
354 | { | |
355 | struct sk_msg *ret; | |
356 | ||
357 | spin_lock_bh(&psock->ingress_lock); | |
358 | if (list_is_last(&msg->list, &psock->ingress_msg)) | |
359 | ret = NULL; | |
360 | else | |
361 | ret = list_next_entry(msg, list); | |
362 | spin_unlock_bh(&psock->ingress_lock); | |
363 | return ret; | |
604326b4 DB |
364 | } |
365 | ||
d3b18ad3 JF |
366 | static inline bool sk_psock_queue_empty(const struct sk_psock *psock) |
367 | { | |
368 | return psock ? list_empty(&psock->ingress_msg) : true; | |
369 | } | |
370 | ||
b01fd6e8 CW |
371 | static inline void kfree_sk_msg(struct sk_msg *msg) |
372 | { | |
373 | if (msg->skb) | |
374 | consume_skb(msg->skb); | |
375 | kfree(msg); | |
376 | } | |
377 | ||
604326b4 DB |
378 | static inline void sk_psock_report_error(struct sk_psock *psock, int err) |
379 | { | |
380 | struct sock *sk = psock->sk; | |
381 | ||
382 | sk->sk_err = err; | |
e3ae2365 | 383 | sk_error_report(sk); |
604326b4 DB |
384 | } |
385 | ||
386 | struct sk_psock *sk_psock_init(struct sock *sk, int node); | |
799aa7f9 | 387 | void sk_psock_stop(struct sk_psock *psock, bool wait); |
604326b4 | 388 | |
88759609 | 389 | #if IS_ENABLED(CONFIG_BPF_STREAM_PARSER) |
604326b4 DB |
390 | int sk_psock_init_strp(struct sock *sk, struct sk_psock *psock); |
391 | void sk_psock_start_strp(struct sock *sk, struct sk_psock *psock); | |
392 | void sk_psock_stop_strp(struct sock *sk, struct sk_psock *psock); | |
88759609 CW |
393 | #else |
394 | static inline int sk_psock_init_strp(struct sock *sk, struct sk_psock *psock) | |
395 | { | |
396 | return -EOPNOTSUPP; | |
397 | } | |
398 | ||
399 | static inline void sk_psock_start_strp(struct sock *sk, struct sk_psock *psock) | |
400 | { | |
401 | } | |
402 | ||
403 | static inline void sk_psock_stop_strp(struct sock *sk, struct sk_psock *psock) | |
404 | { | |
405 | } | |
406 | #endif | |
407 | ||
ef565928 JF |
408 | void sk_psock_start_verdict(struct sock *sk, struct sk_psock *psock); |
409 | void sk_psock_stop_verdict(struct sock *sk, struct sk_psock *psock); | |
604326b4 DB |
410 | |
411 | int sk_psock_msg_verdict(struct sock *sk, struct sk_psock *psock, | |
412 | struct sk_msg *msg); | |
413 | ||
414 | static inline struct sk_psock_link *sk_psock_init_link(void) | |
415 | { | |
416 | return kzalloc(sizeof(struct sk_psock_link), | |
417 | GFP_ATOMIC | __GFP_NOWARN); | |
418 | } | |
419 | ||
420 | static inline void sk_psock_free_link(struct sk_psock_link *link) | |
421 | { | |
422 | kfree(link); | |
423 | } | |
424 | ||
425 | struct sk_psock_link *sk_psock_link_pop(struct sk_psock *psock); | |
604326b4 | 426 | |
604326b4 DB |
427 | static inline void sk_psock_cork_free(struct sk_psock *psock) |
428 | { | |
429 | if (psock->cork) { | |
430 | sk_msg_free(psock->sk, psock->cork); | |
431 | kfree(psock->cork); | |
432 | psock->cork = NULL; | |
433 | } | |
434 | } | |
435 | ||
604326b4 DB |
436 | static inline void sk_psock_restore_proto(struct sock *sk, |
437 | struct sk_psock *psock) | |
438 | { | |
8a59f9d1 | 439 | if (psock->psock_update_sk_prot) |
51e0158a | 440 | psock->psock_update_sk_prot(sk, psock, true); |
604326b4 DB |
441 | } |
442 | ||
604326b4 DB |
443 | static inline struct sk_psock *sk_psock_get(struct sock *sk) |
444 | { | |
445 | struct sk_psock *psock; | |
446 | ||
447 | rcu_read_lock(); | |
448 | psock = sk_psock(sk); | |
449 | if (psock && !refcount_inc_not_zero(&psock->refcnt)) | |
450 | psock = NULL; | |
451 | rcu_read_unlock(); | |
452 | return psock; | |
453 | } | |
454 | ||
604326b4 DB |
455 | void sk_psock_drop(struct sock *sk, struct sk_psock *psock); |
456 | ||
457 | static inline void sk_psock_put(struct sock *sk, struct sk_psock *psock) | |
458 | { | |
459 | if (refcount_dec_and_test(&psock->refcnt)) | |
460 | sk_psock_drop(sk, psock); | |
461 | } | |
462 | ||
552de910 JF |
463 | static inline void sk_psock_data_ready(struct sock *sk, struct sk_psock *psock) |
464 | { | |
5a685cd9 CW |
465 | if (psock->saved_data_ready) |
466 | psock->saved_data_ready(sk); | |
552de910 JF |
467 | else |
468 | sk->sk_data_ready(sk); | |
469 | } | |
470 | ||
604326b4 DB |
471 | static inline void psock_set_prog(struct bpf_prog **pprog, |
472 | struct bpf_prog *prog) | |
473 | { | |
474 | prog = xchg(pprog, prog); | |
475 | if (prog) | |
476 | bpf_prog_put(prog); | |
477 | } | |
478 | ||
bb0de313 LB |
479 | static inline int psock_replace_prog(struct bpf_prog **pprog, |
480 | struct bpf_prog *prog, | |
481 | struct bpf_prog *old) | |
482 | { | |
483 | if (cmpxchg(pprog, old, prog) != old) | |
484 | return -ENOENT; | |
485 | ||
486 | if (old) | |
487 | bpf_prog_put(old); | |
488 | ||
489 | return 0; | |
490 | } | |
491 | ||
604326b4 DB |
492 | static inline void psock_progs_drop(struct sk_psock_progs *progs) |
493 | { | |
494 | psock_set_prog(&progs->msg_parser, NULL); | |
ae8b8332 CW |
495 | psock_set_prog(&progs->stream_parser, NULL); |
496 | psock_set_prog(&progs->stream_verdict, NULL); | |
a7ba4558 | 497 | psock_set_prog(&progs->skb_verdict, NULL); |
604326b4 DB |
498 | } |
499 | ||
e91de6af JF |
500 | int sk_psock_tls_strp_read(struct sk_psock *psock, struct sk_buff *skb); |
501 | ||
502 | static inline bool sk_psock_strp_enabled(struct sk_psock *psock) | |
503 | { | |
504 | if (!psock) | |
505 | return false; | |
5a685cd9 | 506 | return !!psock->saved_data_ready; |
e91de6af | 507 | } |
e3526bb9 CW |
508 | |
509 | #if IS_ENABLED(CONFIG_NET_SOCK_MSG) | |
510 | ||
511 | /* We only have one bit so far. */ | |
512 | #define BPF_F_PTR_MASK ~(BPF_F_INGRESS) | |
513 | ||
514 | static inline bool skb_bpf_ingress(const struct sk_buff *skb) | |
515 | { | |
516 | unsigned long sk_redir = skb->_sk_redir; | |
517 | ||
518 | return sk_redir & BPF_F_INGRESS; | |
519 | } | |
520 | ||
521 | static inline void skb_bpf_set_ingress(struct sk_buff *skb) | |
522 | { | |
523 | skb->_sk_redir |= BPF_F_INGRESS; | |
524 | } | |
525 | ||
526 | static inline void skb_bpf_set_redir(struct sk_buff *skb, struct sock *sk_redir, | |
527 | bool ingress) | |
528 | { | |
529 | skb->_sk_redir = (unsigned long)sk_redir; | |
530 | if (ingress) | |
531 | skb->_sk_redir |= BPF_F_INGRESS; | |
532 | } | |
533 | ||
534 | static inline struct sock *skb_bpf_redirect_fetch(const struct sk_buff *skb) | |
535 | { | |
536 | unsigned long sk_redir = skb->_sk_redir; | |
537 | ||
538 | return (struct sock *)(sk_redir & BPF_F_PTR_MASK); | |
539 | } | |
540 | ||
541 | static inline void skb_bpf_redirect_clear(struct sk_buff *skb) | |
542 | { | |
543 | skb->_sk_redir = 0; | |
544 | } | |
545 | #endif /* CONFIG_NET_SOCK_MSG */ | |
604326b4 | 546 | #endif /* _LINUX_SKMSG_H */ |