sys/netinet/sctp_lock_bsd.h

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