sys/netinet/sctp_lock_bsd.h

   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 /*
 341  * For the majority of things (once we have found the association) we will
 342  * lock the actual association mutex. This will protect all the assoiciation
 343  * level queues and streams and such. We will need to lock the socket layer
 344  * when we stuff data up into the receiving sb_mb. I.e. we will need to do an
 345  * extra SOCKBUF_LOCK(&so->so_rcv) even though the association is locked.
 346  */
 347
 348 #define SCTP_TCB_LOCK_INIT(_tcb) do {                                   \
 349         mtx_init(&(_tcb)->tcb_mtx, "sctp-tcb", "tcb",                   \
 350                  MTX_DEF | MTX_DUPOK);                                  \
 351 } while (0)
 352
 353 #define SCTP_TCB_LOCK_DESTROY(_tcb) do {                                \
 354         mtx_destroy(&(_tcb)->tcb_mtx);                                  \
 355 } while (0)
 356
 357 #ifdef SCTP_LOCK_LOGGING
 358 #define SCTP_TCB_LOCK(_tcb) do {                                        \
 359         if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOCK_LOGGING_ENABLE) \
 360                 sctp_log_lock(_tcb->sctp_ep, _tcb, SCTP_LOG_LOCK_TCB);  \
 361         mtx_lock(&(_tcb)->tcb_mtx);                                     \
 362 } while (0)
 363 #else
 364 #define SCTP_TCB_LOCK(_tcb) do {                                        \
 365         mtx_lock(&(_tcb)->tcb_mtx);                                     \
 366 } while (0)
 367
 368 #endif
 369
 370 #define SCTP_TCB_TRYLOCK(_tcb)                                          \
 371         mtx_trylock(&(_tcb)->tcb_mtx)
 372
 373 #define SCTP_TCB_UNLOCK(_tcb) do {                                      \
 374         mtx_unlock(&(_tcb)->tcb_mtx);                                   \
 375 } while (0)
 376
 377 #define SCTP_TCB_UNLOCK_IFOWNED(_tcb) do {                              \
 378         if (mtx_owned(&(_tcb)->tcb_mtx))                                \
 379                 mtx_unlock(&(_tcb)->tcb_mtx);                           \
 380 } while (0)
 381
 382 #define SCTP_TCB_LOCK_ASSERT(_tcb) do {                                 \
 383         KASSERT(mtx_owned(&(_tcb)->tcb_mtx),                            \
 384                 ("Don't own TCB lock"));                                \
 385 } while (0)
 386
 387 #define SCTP_ITERATOR_LOCK_INIT() do {                                  \
 388         mtx_init(&sctp_it_ctl.it_mtx, "sctp-it", "iterator", MTX_DEF);  \
 389 } while (0)
 390
 391 #define SCTP_ITERATOR_LOCK_DESTROY() do {                               \
 392         mtx_destroy(&sctp_it_ctl.it_mtx);                               \
 393 } while (0)
 394
 395 #define SCTP_ITERATOR_LOCK() \
 396         do {                                                            \
 397                 KASSERT(!mtx_owned(&sctp_it_ctl.it_mtx),                \
 398                         ("Own the iterator lock"));                     \
 399                 mtx_lock(&sctp_it_ctl.it_mtx);                          \
 400         } while (0)
 401
 402 #define SCTP_ITERATOR_UNLOCK() do {                                     \
 403         mtx_unlock(&sctp_it_ctl.it_mtx);                                \
 404 } while (0)
 405
 406 #define SCTP_WQ_ADDR_INIT() do {                                        \
 407         mtx_init(&SCTP_BASE_INFO(wq_addr_mtx),                          \
 408                  "sctp-addr-wq","sctp_addr_wq", MTX_DEF);               \
 409 } while (0)
 410
 411 #define SCTP_WQ_ADDR_DESTROY() do  {                                    \
 412         if (mtx_owned(&SCTP_BASE_INFO(wq_addr_mtx))) {                  \
 413                 mtx_unlock(&SCTP_BASE_INFO(wq_addr_mtx));               \
 414         }                                                               \
 415         mtx_destroy(&SCTP_BASE_INFO(wq_addr_mtx)); \
 416 } while (0)
 417
 418 #define SCTP_WQ_ADDR_LOCK()     do {                                    \
 419         mtx_lock(&SCTP_BASE_INFO(wq_addr_mtx));                         \
 420 } while (0)
 421
 422 #define SCTP_WQ_ADDR_UNLOCK() do {                                      \
 423                 mtx_unlock(&SCTP_BASE_INFO(wq_addr_mtx));               \
 424 } while (0)
 425
 426 #define SCTP_WQ_ADDR_LOCK_ASSERT() do {                                 \
 427         KASSERT(mtx_owned(&SCTP_BASE_INFO(wq_addr_mtx)),                \
 428                 ("Don't own the ADDR-WQ lock"));                        \
 429 } while (0)
 430
 431 #define SCTP_INCR_EP_COUNT() do {                                       \
 432         atomic_add_int(&SCTP_BASE_INFO(ipi_count_ep), 1);               \
 433 } while (0)
 434
 435 #define SCTP_DECR_EP_COUNT() do {                                       \
 436         atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ep), 1);          \
 437 } while (0)
 438
 439 #define SCTP_INCR_ASOC_COUNT() do {                                     \
 440         atomic_add_int(&SCTP_BASE_INFO(ipi_count_asoc), 1);             \
 441 } while (0)
 442
 443 #define SCTP_DECR_ASOC_COUNT() do {                                     \
 444         atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_asoc), 1);        \
 445 } while (0)
 446
 447 #define SCTP_INCR_LADDR_COUNT() do {                                    \
 448         atomic_add_int(&SCTP_BASE_INFO(ipi_count_laddr), 1);            \
 449 } while (0)
 450
 451 #define SCTP_DECR_LADDR_COUNT() do {                                    \
 452         atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_laddr), 1);       \
 453 } while (0)
 454
 455 #define SCTP_INCR_RADDR_COUNT() do {                                    \
 456         atomic_add_int(&SCTP_BASE_INFO(ipi_count_raddr), 1);            \
 457 } while (0)
 458
 459 #define SCTP_DECR_RADDR_COUNT() do {                                    \
 460         atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_raddr),1);        \
 461 } while (0)
 462
 463 #define SCTP_INCR_CHK_COUNT() do {                                      \
 464         atomic_add_int(&SCTP_BASE_INFO(ipi_count_chunk), 1);            \
 465 } while (0)
 466
 467 #define SCTP_DECR_CHK_COUNT() do {                                      \
 468         KASSERT(SCTP_BASE_INFO(ipi_count_chunk) > 0,                    \
 469                 ("ipi_count_chunk would become negative"));             \
 470         if (SCTP_BASE_INFO(ipi_count_chunk) != 0)                       \
 471                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_chunk),   \
 472                                     1);                                 \
 473 } while (0)
 474
 475 #define SCTP_INCR_READQ_COUNT() do {                                    \
 476         atomic_add_int(&SCTP_BASE_INFO(ipi_count_readq), 1);            \
 477 } while (0)
 478
 479 #define SCTP_DECR_READQ_COUNT() do {                                    \
 480         atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_readq), 1);       \
 481 } while (0)
 482
 483 #define SCTP_INCR_STRMOQ_COUNT() do {                                   \
 484         atomic_add_int(&SCTP_BASE_INFO(ipi_count_strmoq), 1);           \
 485 } while (0)
 486
 487 #define SCTP_DECR_STRMOQ_COUNT() do {                                   \
 488         atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_strmoq), 1);      \
 489 } while (0)
 490
 491 #if defined(SCTP_SO_LOCK_TESTING)
 492 #define SCTP_INP_SO(sctpinp)                                            \
 493         (sctpinp)->ip_inp.inp.inp_socket
 494 #define SCTP_SOCKET_LOCK(so, refcnt)
 495 #define SCTP_SOCKET_UNLOCK(so, refcnt)
 496 #endif
 497
 498 #endif