FreeBSD kernel IPv4 code
sctp_lock_bsd.h
Go to the documentation of this file.
1/*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved.
5 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
6 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions are met:
10 *
11 * a) Redistributions of source code must retain the above copyright notice,
12 * this list of conditions and the following disclaimer.
13 *
14 * b) Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the distribution.
17 *
18 * c) Neither the name of Cisco Systems, Inc. nor the names of its
19 * contributors may be used to endorse or promote products derived
20 * from this software without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
23 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
24 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
26 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
32 * THE POSSIBILITY OF SUCH DAMAGE.
33 */
34
35#include <sys/cdefs.h>
36__FBSDID("$FreeBSD$");
37
38#ifndef _NETINET_SCTP_LOCK_BSD_H_
39#define _NETINET_SCTP_LOCK_BSD_H_
40
41/*
42 * General locking concepts: The goal of our locking is to of course provide
43 * consistency and yet minimize overhead. We will attempt to use
44 * non-recursive locks which are supposed to be quite inexpensive. Now in
45 * order to do this the goal is that most functions are not aware of locking.
46 * Once we have a TCB we lock it and unlock when we are through. This means
47 * that the TCB lock is kind-of a "global" lock when working on an
48 * association. Caution must be used when asserting a TCB_LOCK since if we
49 * recurse we deadlock.
50 *
51 * Most other locks (INP and INFO) attempt to localize the locking i.e. we try
52 * to contain the lock and unlock within the function that needs to lock it.
53 * This sometimes mean we do extra locks and unlocks and lose a bit of
54 * efficiency, but if the performance statements about non-recursive locks are
55 * true this should not be a problem. One issue that arises with this only
56 * lock when needed is that if an implicit association setup is done we have
57 * a problem. If at the time I lookup an association I have NULL in the tcb
58 * return, by the time I call to create the association some other processor
59 * could have created it. This is what the CREATE lock on the endpoint.
60 * Places where we will be implicitly creating the association OR just
61 * creating an association (the connect call) will assert the CREATE_INP
62 * lock. This will assure us that during all the lookup of INP and INFO if
63 * another creator is also locking/looking up we can gate the two to
64 * synchronize. So the CREATE_INP lock is also another one we must use
65 * extreme caution in locking to make sure we don't hit a re-entrancy issue.
66 *
67 */
68
69/*
70 * When working with the global SCTP lists we lock and unlock the INP_INFO
71 * lock. So when we go to lookup an association we will want to do a
72 * SCTP_INP_INFO_RLOCK() and then when we want to add a new association to
73 * the SCTP_BASE_INFO() list's we will do a SCTP_INP_INFO_WLOCK().
74 */
75
76#define SCTP_IPI_COUNT_INIT()
77
78#define SCTP_STATLOG_INIT_LOCK()
79#define SCTP_STATLOG_DESTROY()
80#define SCTP_STATLOG_LOCK()
81#define SCTP_STATLOG_UNLOCK()
82
83#define SCTP_INP_INFO_LOCK_INIT() do { \
84 rw_init(&SCTP_BASE_INFO(ipi_ep_mtx), "sctp-info"); \
85} while (0)
86
87#define SCTP_INP_INFO_LOCK_DESTROY() do { \
88 if (rw_wowned(&SCTP_BASE_INFO(ipi_ep_mtx))) { \
89 rw_wunlock(&SCTP_BASE_INFO(ipi_ep_mtx)); \
90 } \
91 rw_destroy(&SCTP_BASE_INFO(ipi_ep_mtx)); \
92} while (0)
93
94#define SCTP_INP_INFO_RLOCK() do { \
95 rw_rlock(&SCTP_BASE_INFO(ipi_ep_mtx)); \
96} while (0)
97
98#define SCTP_INP_INFO_WLOCK() do { \
99 rw_wlock(&SCTP_BASE_INFO(ipi_ep_mtx)); \
100} while (0)
101
102#define SCTP_INP_INFO_RUNLOCK() do { \
103 rw_runlock(&SCTP_BASE_INFO(ipi_ep_mtx)); \
104} while (0)
105
106#define SCTP_INP_INFO_WUNLOCK() do { \
107 rw_wunlock(&SCTP_BASE_INFO(ipi_ep_mtx)); \
108} while (0)
109
110#define SCTP_INP_INFO_LOCK_ASSERT() do { \
111 rw_assert(&SCTP_BASE_INFO(ipi_ep_mtx), RA_LOCKED); \
112} while (0)
113
114#define SCTP_INP_INFO_RLOCK_ASSERT() do { \
115 rw_assert(&SCTP_BASE_INFO(ipi_ep_mtx), RA_RLOCKED); \
116} while (0)
117
118#define SCTP_INP_INFO_WLOCK_ASSERT() do { \
119 rw_assert(&SCTP_BASE_INFO(ipi_ep_mtx), RA_WLOCKED); \
120} while (0)
121
122#define SCTP_MCORE_QLOCK_INIT(cpstr) do { \
123 mtx_init(&(cpstr)->que_mtx, "sctp-mcore_queue","queue_lock", \
124 MTX_DEF | MTX_DUPOK); \
125} while (0)
126
127#define SCTP_MCORE_QDESTROY(cpstr) do { \
128 if (mtx_owned(&(cpstr)->core_mtx)) { \
129 mtx_unlock(&(cpstr)->que_mtx); \
130 } \
131 mtx_destroy(&(cpstr)->que_mtx); \
132} while (0)
133
134#define SCTP_MCORE_QLOCK(cpstr) do { \
135 mtx_lock(&(cpstr)->que_mtx); \
136} while (0)
137
138#define SCTP_MCORE_QUNLOCK(cpstr) do { \
139 mtx_unlock(&(cpstr)->que_mtx); \
140} while (0)
141
142#define SCTP_MCORE_LOCK_INIT(cpstr) do { \
143 mtx_init(&(cpstr)->core_mtx, "sctp-cpulck","cpu_proc_lock", \
144 MTX_DEF | MTX_DUPOK); \
145} while (0)
146
147#define SCTP_MCORE_DESTROY(cpstr) do { \
148 if (mtx_owned(&(cpstr)->core_mtx)) { \
149 mtx_unlock(&(cpstr)->core_mtx); \
150 } \
151 mtx_destroy(&(cpstr)->core_mtx); \
152} while (0)
153
154#define SCTP_MCORE_LOCK(cpstr) do { \
155 mtx_lock(&(cpstr)->core_mtx); \
156} while (0)
157
158#define SCTP_MCORE_UNLOCK(cpstr) do { \
159 mtx_unlock(&(cpstr)->core_mtx); \
160} while (0)
161
162#define SCTP_IPI_ADDR_INIT() do { \
163 rw_init(&SCTP_BASE_INFO(ipi_addr_mtx), "sctp-addr"); \
164} while (0)
165
166#define SCTP_IPI_ADDR_DESTROY() do { \
167 if (rw_wowned(&SCTP_BASE_INFO(ipi_addr_mtx))) { \
168 rw_wunlock(&SCTP_BASE_INFO(ipi_addr_mtx)); \
169 } \
170 rw_destroy(&SCTP_BASE_INFO(ipi_addr_mtx)); \
171} while (0)
172
173#define SCTP_IPI_ADDR_RLOCK() do { \
174 rw_rlock(&SCTP_BASE_INFO(ipi_addr_mtx)); \
175} while (0)
176
177#define SCTP_IPI_ADDR_WLOCK() do { \
178 rw_wlock(&SCTP_BASE_INFO(ipi_addr_mtx)); \
179} while (0)
180
181#define SCTP_IPI_ADDR_RUNLOCK() do { \
182 rw_runlock(&SCTP_BASE_INFO(ipi_addr_mtx)); \
183} while (0)
184
185#define SCTP_IPI_ADDR_WUNLOCK() do { \
186 rw_wunlock(&SCTP_BASE_INFO(ipi_addr_mtx)); \
187} while (0)
188
189#define SCTP_IPI_ADDR_LOCK_ASSERT() do { \
190 rw_assert(&SCTP_BASE_INFO(ipi_addr_mtx), RA_LOCKED); \
191} while (0)
192
193#define SCTP_IPI_ADDR_WLOCK_ASSERT() do { \
194 rw_assert(&SCTP_BASE_INFO(ipi_addr_mtx), RA_WLOCKED); \
195} while (0)
196
197#define SCTP_IPI_ITERATOR_WQ_INIT() do { \
198 mtx_init(&sctp_it_ctl.ipi_iterator_wq_mtx, "sctp-it-wq", \
199 "sctp_it_wq", MTX_DEF); \
200} while (0)
201
202#define SCTP_IPI_ITERATOR_WQ_DESTROY() do { \
203 mtx_destroy(&sctp_it_ctl.ipi_iterator_wq_mtx); \
204} while (0)
205
206#define SCTP_IPI_ITERATOR_WQ_LOCK() do { \
207 mtx_lock(&sctp_it_ctl.ipi_iterator_wq_mtx); \
208} while (0)
209
210#define SCTP_IPI_ITERATOR_WQ_UNLOCK() do { \
211 mtx_unlock(&sctp_it_ctl.ipi_iterator_wq_mtx); \
212} while (0)
213
214#define SCTP_IP_PKTLOG_INIT() do { \
215 mtx_init(&SCTP_BASE_INFO(ipi_pktlog_mtx), "sctp-pktlog", \
216 "packetlog", MTX_DEF); \
217} while (0)
218
219#define SCTP_IP_PKTLOG_DESTROY() do { \
220 mtx_destroy(&SCTP_BASE_INFO(ipi_pktlog_mtx)); \
221} while (0)
222
223#define SCTP_IP_PKTLOG_LOCK() do { \
224 mtx_lock(&SCTP_BASE_INFO(ipi_pktlog_mtx)); \
225} while (0)
226
227#define SCTP_IP_PKTLOG_UNLOCK() do { \
228 mtx_unlock(&SCTP_BASE_INFO(ipi_pktlog_mtx)); \
229} while (0)
230
231/*
232 * The INP locks we will use for locking an SCTP endpoint, so for example if
233 * we want to change something at the endpoint level for example random_store
234 * or cookie secrets we lock the INP level.
235 */
236
237#define SCTP_INP_READ_INIT(_inp) do { \
238 mtx_init(&(_inp)->inp_rdata_mtx, "sctp-read", "inpr", \
239 MTX_DEF | MTX_DUPOK); \
240} while (0)
241
242#define SCTP_INP_READ_DESTROY(_inp) do { \
243 mtx_destroy(&(_inp)->inp_rdata_mtx); \
244} while (0)
245
246#define SCTP_INP_READ_LOCK(_inp) do { \
247 mtx_lock(&(_inp)->inp_rdata_mtx); \
248} while (0)
249
250#define SCTP_INP_READ_UNLOCK(_inp) do { \
251 mtx_unlock(&(_inp)->inp_rdata_mtx); \
252} while (0)
253
254#define SCTP_INP_LOCK_INIT(_inp) do { \
255 mtx_init(&(_inp)->inp_mtx, "sctp-inp", "inp", \
256 MTX_DEF | MTX_DUPOK); \
257} while (0)
258
259#define SCTP_INP_LOCK_DESTROY(_inp) do { \
260 mtx_destroy(&(_inp)->inp_mtx); \
261} while (0)
262
263#define SCTP_INP_LOCK_CONTENDED(_inp) \
264 ((_inp)->inp_mtx.mtx_lock & MTX_CONTESTED)
265
266#define SCTP_INP_READ_CONTENDED(_inp) \
267 ((_inp)->inp_rdata_mtx.mtx_lock & MTX_CONTESTED)
268
269#ifdef SCTP_LOCK_LOGGING
270#define SCTP_INP_RLOCK(_inp) do { \
271 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOCK_LOGGING_ENABLE) \
272 sctp_log_lock(_inp, NULL, SCTP_LOG_LOCK_INP); \
273 mtx_lock(&(_inp)->inp_mtx); \
274} while (0)
275
276#define SCTP_INP_WLOCK(_inp) do { \
277 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOCK_LOGGING_ENABLE) \
278 sctp_log_lock(_inp, NULL, SCTP_LOG_LOCK_INP); \
279 mtx_lock(&(_inp)->inp_mtx); \
280} while (0)
281#else
282#define SCTP_INP_RLOCK(_inp) do { \
283 mtx_lock(&(_inp)->inp_mtx); \
284} while (0)
285
286#define SCTP_INP_WLOCK(_inp) do { \
287 mtx_lock(&(_inp)->inp_mtx); \
288} while (0)
289#endif
290
291#define SCTP_INP_RUNLOCK(_inp) do { \
292 mtx_unlock(&(_inp)->inp_mtx); \
293} while (0)
294
295#define SCTP_INP_WUNLOCK(_inp) do { \
296 mtx_unlock(&(_inp)->inp_mtx); \
297} while (0)
298
299#define SCTP_INP_RLOCK_ASSERT(_inp) do { \
300 KASSERT(mtx_owned(&(_inp)->inp_mtx), \
301 ("Don't own INP read lock")); \
302} while (0)
303
304#define SCTP_INP_WLOCK_ASSERT(_inp) do { \
305 KASSERT(mtx_owned(&(_inp)->inp_mtx), \
306 ("Don't own INP write lock")); \
307} while (0)
308
309#define SCTP_INP_INCR_REF(_inp) atomic_add_int(&((_inp)->refcount), 1)
310#define SCTP_INP_DECR_REF(_inp) atomic_add_int(&((_inp)->refcount), -1)
311
312#define SCTP_ASOC_CREATE_LOCK_INIT(_inp) do { \
313 mtx_init(&(_inp)->inp_create_mtx, "sctp-create", "inp_create", \
314 MTX_DEF | MTX_DUPOK); \
315} while (0)
316
317#define SCTP_ASOC_CREATE_LOCK_DESTROY(_inp) do { \
318 mtx_destroy(&(_inp)->inp_create_mtx); \
319} while (0)
320
321#ifdef SCTP_LOCK_LOGGING
322#define SCTP_ASOC_CREATE_LOCK(_inp) do { \
323 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOCK_LOGGING_ENABLE) \
324 sctp_log_lock(_inp, NULL, SCTP_LOG_LOCK_CREATE); \
325 mtx_lock(&(_inp)->inp_create_mtx); \
326} while (0)
327#else
328#define SCTP_ASOC_CREATE_LOCK(_inp) do { \
329 mtx_lock(&(_inp)->inp_create_mtx); \
330} while (0)
331#endif
332
333#define SCTP_ASOC_CREATE_UNLOCK(_inp) do { \
334 mtx_unlock(&(_inp)->inp_create_mtx); \
335} while (0)
336
337#define SCTP_ASOC_CREATE_LOCK_CONTENDED(_inp) \
338 ((_inp)->inp_create_mtx.mtx_lock & MTX_CONTESTED)
339
340#define SCTP_TCB_SEND_LOCK_INIT(_tcb) do { \
341 mtx_init(&(_tcb)->tcb_send_mtx, "sctp-send-tcb", "tcbs", \
342 MTX_DEF | MTX_DUPOK); \
343} while (0)
344
345#define SCTP_TCB_SEND_LOCK_DESTROY(_tcb) do { \
346 mtx_destroy(&(_tcb)->tcb_send_mtx); \
347} while (0)
348
349#define SCTP_TCB_SEND_LOCK(_tcb) do { \
350 mtx_lock(&(_tcb)->tcb_send_mtx); \
351} while (0)
352
353#define SCTP_TCB_SEND_UNLOCK(_tcb) do { \
354 mtx_unlock(&(_tcb)->tcb_send_mtx); \
355} while (0)
356
357#define SCTP_TCB_SEND_LOCK_ASSERT(_tcb) do { \
358 KASSERT(mtx_owned(&(_tcb)->tcb_send_mtx), \
359 ("Don't own TCB send lock")); \
360} while (0)
361
362/*
363 * For the majority of things (once we have found the association) we will
364 * lock the actual association mutex. This will protect all the assoiciation
365 * level queues and streams and such. We will need to lock the socket layer
366 * when we stuff data up into the receiving sb_mb. I.e. we will need to do an
367 * extra SOCKBUF_LOCK(&so->so_rcv) even though the association is locked.
368 */
369
370#define SCTP_TCB_LOCK_INIT(_tcb) do { \
371 mtx_init(&(_tcb)->tcb_mtx, "sctp-tcb", "tcb", \
372 MTX_DEF | MTX_DUPOK); \
373} while (0)
374
375#define SCTP_TCB_LOCK_DESTROY(_tcb) do { \
376 mtx_destroy(&(_tcb)->tcb_mtx); \
377} while (0)
378
379#ifdef SCTP_LOCK_LOGGING
380#define SCTP_TCB_LOCK(_tcb) do { \
381 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOCK_LOGGING_ENABLE) \
382 sctp_log_lock(_tcb->sctp_ep, _tcb, SCTP_LOG_LOCK_TCB); \
383 mtx_lock(&(_tcb)->tcb_mtx); \
384} while (0)
385#else
386#define SCTP_TCB_LOCK(_tcb) do { \
387 mtx_lock(&(_tcb)->tcb_mtx); \
388} while (0)
389
390#endif
391
392#define SCTP_TCB_TRYLOCK(_tcb) \
393 mtx_trylock(&(_tcb)->tcb_mtx)
394
395#define SCTP_TCB_UNLOCK(_tcb) do { \
396 mtx_unlock(&(_tcb)->tcb_mtx); \
397} while (0)
398
399#define SCTP_TCB_UNLOCK_IFOWNED(_tcb) do { \
400 if (mtx_owned(&(_tcb)->tcb_mtx)) \
401 mtx_unlock(&(_tcb)->tcb_mtx); \
402} while (0)
403
404#define SCTP_TCB_LOCK_ASSERT(_tcb) do { \
405 KASSERT(mtx_owned(&(_tcb)->tcb_mtx), \
406 ("Don't own TCB lock")); \
407} while (0)
408
409#define SCTP_ITERATOR_LOCK_INIT() do { \
410 mtx_init(&sctp_it_ctl.it_mtx, "sctp-it", "iterator", MTX_DEF); \
411} while (0)
412
413#define SCTP_ITERATOR_LOCK_DESTROY() do { \
414 mtx_destroy(&sctp_it_ctl.it_mtx); \
415} while (0)
416
417#define SCTP_ITERATOR_LOCK() \
418 do { \
419 KASSERT(!mtx_owned(&sctp_it_ctl.it_mtx), \
420 ("Own the iterator lock")); \
421 mtx_lock(&sctp_it_ctl.it_mtx); \
422 } while (0)
423
424#define SCTP_ITERATOR_UNLOCK() do { \
425 mtx_unlock(&sctp_it_ctl.it_mtx); \
426} while (0)
427
428#define SCTP_WQ_ADDR_INIT() do { \
429 mtx_init(&SCTP_BASE_INFO(wq_addr_mtx), \
430 "sctp-addr-wq","sctp_addr_wq", MTX_DEF); \
431} while (0)
432
433#define SCTP_WQ_ADDR_DESTROY() do { \
434 if (mtx_owned(&SCTP_BASE_INFO(wq_addr_mtx))) { \
435 mtx_unlock(&SCTP_BASE_INFO(wq_addr_mtx)); \
436 } \
437 mtx_destroy(&SCTP_BASE_INFO(wq_addr_mtx)); \
438} while (0)
439
440#define SCTP_WQ_ADDR_LOCK() do { \
441 mtx_lock(&SCTP_BASE_INFO(wq_addr_mtx)); \
442} while (0)
443
444#define SCTP_WQ_ADDR_UNLOCK() do { \
445 mtx_unlock(&SCTP_BASE_INFO(wq_addr_mtx)); \
446} while (0)
447
448#define SCTP_WQ_ADDR_LOCK_ASSERT() do { \
449 KASSERT(mtx_owned(&SCTP_BASE_INFO(wq_addr_mtx)), \
450 ("Don't own the ADDR-WQ lock")); \
451} while (0)
452
453#define SCTP_INCR_EP_COUNT() do { \
454 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ep), 1); \
455} while (0)
456
457#define SCTP_DECR_EP_COUNT() do { \
458 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ep), 1); \
459} while (0)
460
461#define SCTP_INCR_ASOC_COUNT() do { \
462 atomic_add_int(&SCTP_BASE_INFO(ipi_count_asoc), 1); \
463} while (0)
464
465#define SCTP_DECR_ASOC_COUNT() do { \
466 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_asoc), 1); \
467} while (0)
468
469#define SCTP_INCR_LADDR_COUNT() do { \
470 atomic_add_int(&SCTP_BASE_INFO(ipi_count_laddr), 1); \
471} while (0)
472
473#define SCTP_DECR_LADDR_COUNT() do { \
474 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_laddr), 1); \
475} while (0)
476
477#define SCTP_INCR_RADDR_COUNT() do { \
478 atomic_add_int(&SCTP_BASE_INFO(ipi_count_raddr), 1); \
479} while (0)
480
481#define SCTP_DECR_RADDR_COUNT() do { \
482 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_raddr),1); \
483} while (0)
484
485#define SCTP_INCR_CHK_COUNT() do { \
486 atomic_add_int(&SCTP_BASE_INFO(ipi_count_chunk), 1); \
487} while (0)
488
489#define SCTP_DECR_CHK_COUNT() do { \
490 KASSERT(SCTP_BASE_INFO(ipi_count_chunk) > 0, \
491 ("ipi_count_chunk would become negative")); \
492 if (SCTP_BASE_INFO(ipi_count_chunk) != 0) \
493 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_chunk), \
494 1); \
495} while (0)
496
497#define SCTP_INCR_READQ_COUNT() do { \
498 atomic_add_int(&SCTP_BASE_INFO(ipi_count_readq), 1); \
499} while (0)
500
501#define SCTP_DECR_READQ_COUNT() do { \
502 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_readq), 1); \
503} while (0)
504
505#define SCTP_INCR_STRMOQ_COUNT() do { \
506 atomic_add_int(&SCTP_BASE_INFO(ipi_count_strmoq), 1); \
507} while (0)
508
509#define SCTP_DECR_STRMOQ_COUNT() do { \
510 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_strmoq), 1); \
511} while (0)
512
513#if defined(SCTP_SO_LOCK_TESTING)
514#define SCTP_INP_SO(sctpinp) \
515 (sctpinp)->ip_inp.inp.inp_socket
516#define SCTP_SOCKET_LOCK(so, refcnt)
517#define SCTP_SOCKET_UNLOCK(so, refcnt)
518#endif
519
520#endif
__FBSDID
__FBSDID("$FreeBSD$")