sctp_lock_bsd.h

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    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
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FreeBSD/Linux Kernel Cross Reference sys/netinet/sctp_lock_bsd.h

FreeBSD/Linux Kernel Cross Reference
sys/netinet/sctp_lock_bsd.h
