sctp_lock_bsd.h

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    1 #ifndef __sctp_lock_bsd_h__
    2 #define __sctp_lock_bsd_h__
    3 /*-
    4  * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved.
    5  * Copyright (c) 2008-2011, by Randall Stewart. All rights reserved.
    6  * Copyright (c) 2008-2011, 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 /*
   36  * General locking concepts: The goal of our locking is to of course provide
   37  * consistency and yet minimize overhead. We will attempt to use
   38  * non-recursive locks which are supposed to be quite inexpensive. Now in
   39  * order to do this the goal is that most functions are not aware of locking.
   40  * Once we have a TCB we lock it and unlock when we are through. This means
   41  * that the TCB lock is kind-of a "global" lock when working on an
   42  * association. Caution must be used when asserting a TCB_LOCK since if we
   43  * recurse we deadlock.
   44  *
   45  * Most other locks (INP and INFO) attempt to localize the locking i.e. we try
   46  * to contain the lock and unlock within the function that needs to lock it.
   47  * This sometimes mean we do extra locks and unlocks and lose a bit of
   48  * efficency, but if the performance statements about non-recursive locks are
   49  * true this should not be a problem.  One issue that arises with this only
   50  * lock when needed is that if an implicit association setup is done we have
   51  * a problem. If at the time I lookup an association I have NULL in the tcb
   52  * return, by the time I call to create the association some other processor
   53  * could have created it. This is what the CREATE lock on the endpoint.
   54  * Places where we will be implicitly creating the association OR just
   55  * creating an association (the connect call) will assert the CREATE_INP
   56  * lock. This will assure us that during all the lookup of INP and INFO if
   57  * another creator is also locking/looking up we can gate the two to
   58  * synchronize. So the CREATE_INP lock is also another one we must use
   59  * extreme caution in locking to make sure we don't hit a re-entrancy issue.
   60  *
   61  * For non FreeBSD 5.x we provide a bunch of EMPTY lock macros so we can
   62  * blatantly put locks everywhere and they reduce to nothing on
   63  * NetBSD/OpenBSD and FreeBSD 4.x
   64  *
   65  */
   66 
   67 /*
   68  * When working with the global SCTP lists we lock and unlock the INP_INFO
   69  * lock. So when we go to lookup an association we will want to do a
   70  * SCTP_INP_INFO_RLOCK() and then when we want to add a new association to
   71  * the SCTP_BASE_INFO() list's we will do a SCTP_INP_INFO_WLOCK().
   72  */
   73 #include <sys/cdefs.h>
   74 __FBSDID("$FreeBSD: releng/9.0/sys/netinet/sctp_lock_bsd.h 218319 2011-02-05 12:12:51Z rrs $");
   75 
   76 
   77 extern struct sctp_foo_stuff sctp_logoff[];
   78 extern int sctp_logoff_stuff;
   79 
   80 #define SCTP_IPI_COUNT_INIT()
   81 
   82 #define SCTP_STATLOG_INIT_LOCK()
   83 #define SCTP_STATLOG_LOCK()
   84 #define SCTP_STATLOG_UNLOCK()
   85 #define SCTP_STATLOG_DESTROY()
   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_LOCK_INIT() \
   95         rw_init(&SCTP_BASE_INFO(ipi_ep_mtx), "sctp-info");
   96 
   97 
   98 #define SCTP_INP_INFO_RLOCK()   do {                                    \
   99              rw_rlock(&SCTP_BASE_INFO(ipi_ep_mtx));                         \
  100 } while (0)
  101 
  102 #define SCTP_MCORE_QLOCK_INIT(cpstr) do { \
  103                 mtx_init(&(cpstr)->que_mtx,           \
  104                          "sctp-mcore_queue","queue_lock",       \
  105                          MTX_DEF|MTX_DUPOK);            \
  106 } while (0)
  107 
  108 #define SCTP_MCORE_QLOCK(cpstr)  do { \
  109                 mtx_lock(&(cpstr)->que_mtx);    \
  110 } while (0)
  111 
  112 #define SCTP_MCORE_QUNLOCK(cpstr)  do { \
  113                 mtx_unlock(&(cpstr)->que_mtx);  \
  114 } while (0)
  115 
  116 #define SCTP_MCORE_QDESTROY(cpstr)  do { \
  117         if(mtx_owned(&(cpstr)->core_mtx)) {     \
  118                 mtx_unlock(&(cpstr)->que_mtx);  \
  119         } \
  120         mtx_destroy(&(cpstr)->que_mtx); \
  121 } while (0)
  122 
  123 
  124 #define SCTP_MCORE_LOCK_INIT(cpstr) do { \
  125                 mtx_init(&(cpstr)->core_mtx,          \
  126                          "sctp-cpulck","cpu_proc_lock", \
  127                          MTX_DEF|MTX_DUPOK);            \
  128 } while (0)
  129 
  130 #define SCTP_MCORE_LOCK(cpstr)  do { \
  131                 mtx_lock(&(cpstr)->core_mtx);   \
  132 } while (0)
  133 
  134 #define SCTP_MCORE_UNLOCK(cpstr)  do { \
  135                 mtx_unlock(&(cpstr)->core_mtx); \
  136 } while (0)
  137 
  138 #define SCTP_MCORE_DESTROY(cpstr)  do { \
  139         if(mtx_owned(&(cpstr)->core_mtx)) {     \
  140                 mtx_unlock(&(cpstr)->core_mtx); \
  141         } \
  142         mtx_destroy(&(cpstr)->core_mtx);        \
  143 } while (0)
  144 
  145 #define SCTP_INP_INFO_WLOCK()   do {                                    \
  146             rw_wlock(&SCTP_BASE_INFO(ipi_ep_mtx));                         \
  147 } while (0)
  148 
  149 
  150 #define SCTP_INP_INFO_RUNLOCK()         rw_runlock(&SCTP_BASE_INFO(ipi_ep_mtx))
  151 #define SCTP_INP_INFO_WUNLOCK()         rw_wunlock(&SCTP_BASE_INFO(ipi_ep_mtx))
  152 
  153 
  154 #define SCTP_IPI_ADDR_INIT()                                                            \
  155         rw_init(&SCTP_BASE_INFO(ipi_addr_mtx), "sctp-addr")
  156 #define SCTP_IPI_ADDR_DESTROY() do  { \
  157         if(rw_wowned(&SCTP_BASE_INFO(ipi_addr_mtx))) { \
  158              rw_wunlock(&SCTP_BASE_INFO(ipi_addr_mtx)); \
  159         } \
  160         rw_destroy(&SCTP_BASE_INFO(ipi_addr_mtx)); \
  161       }  while (0)
  162 #define SCTP_IPI_ADDR_RLOCK()   do {                                    \
  163              rw_rlock(&SCTP_BASE_INFO(ipi_addr_mtx));                         \
  164 } while (0)
  165 #define SCTP_IPI_ADDR_WLOCK()   do {                                    \
  166              rw_wlock(&SCTP_BASE_INFO(ipi_addr_mtx));                         \
  167 } while (0)
  168 
  169 #define SCTP_IPI_ADDR_RUNLOCK()         rw_runlock(&SCTP_BASE_INFO(ipi_addr_mtx))
  170 #define SCTP_IPI_ADDR_WUNLOCK()         rw_wunlock(&SCTP_BASE_INFO(ipi_addr_mtx))
  171 
  172 
  173 #define SCTP_IPI_ITERATOR_WQ_INIT() \
  174         mtx_init(&sctp_it_ctl.ipi_iterator_wq_mtx, "sctp-it-wq", "sctp_it_wq", MTX_DEF)
  175 
  176 #define SCTP_IPI_ITERATOR_WQ_DESTROY() \
  177         mtx_destroy(&sctp_it_ctl.ipi_iterator_wq_mtx)
  178 
  179 #define SCTP_IPI_ITERATOR_WQ_LOCK()     do {                                    \
  180              mtx_lock(&sctp_it_ctl.ipi_iterator_wq_mtx);                \
  181 } while (0)
  182 
  183 #define SCTP_IPI_ITERATOR_WQ_UNLOCK()           mtx_unlock(&sctp_it_ctl.ipi_iterator_wq_mtx)
  184 
  185 
  186 #define SCTP_IP_PKTLOG_INIT() \
  187         mtx_init(&SCTP_BASE_INFO(ipi_pktlog_mtx), "sctp-pktlog", "packetlog", MTX_DEF)
  188 
  189 
  190 #define SCTP_IP_PKTLOG_LOCK()   do {                    \
  191              mtx_lock(&SCTP_BASE_INFO(ipi_pktlog_mtx));     \
  192 } while (0)
  193 
  194 #define SCTP_IP_PKTLOG_UNLOCK() mtx_unlock(&SCTP_BASE_INFO(ipi_pktlog_mtx))
  195 
  196 #define SCTP_IP_PKTLOG_DESTROY() \
  197         mtx_destroy(&SCTP_BASE_INFO(ipi_pktlog_mtx))
  198 
  199 
  200 
  201 
  202 
  203 /*
  204  * The INP locks we will use for locking an SCTP endpoint, so for example if
  205  * we want to change something at the endpoint level for example random_store
  206  * or cookie secrets we lock the INP level.
  207  */
  208 
  209 #define SCTP_INP_READ_INIT(_inp) \
  210         mtx_init(&(_inp)->inp_rdata_mtx, "sctp-read", "inpr", MTX_DEF | MTX_DUPOK)
  211 
  212 #define SCTP_INP_READ_DESTROY(_inp) \
  213         mtx_destroy(&(_inp)->inp_rdata_mtx)
  214 
  215 #define SCTP_INP_READ_LOCK(_inp)        do { \
  216         mtx_lock(&(_inp)->inp_rdata_mtx);    \
  217 } while (0)
  218 
  219 
  220 #define SCTP_INP_READ_UNLOCK(_inp) mtx_unlock(&(_inp)->inp_rdata_mtx)
  221 
  222 
  223 #define SCTP_INP_LOCK_INIT(_inp) \
  224         mtx_init(&(_inp)->inp_mtx, "sctp-inp", "inp", MTX_DEF | MTX_DUPOK)
  225 #define SCTP_ASOC_CREATE_LOCK_INIT(_inp) \
  226         mtx_init(&(_inp)->inp_create_mtx, "sctp-create", "inp_create", \
  227                  MTX_DEF | MTX_DUPOK)
  228 
  229 #define SCTP_INP_LOCK_DESTROY(_inp) \
  230         mtx_destroy(&(_inp)->inp_mtx)
  231 
  232 #define SCTP_INP_LOCK_CONTENDED(_inp) ((_inp)->inp_mtx.mtx_lock & MTX_CONTESTED)
  233 
  234 #define SCTP_INP_READ_CONTENDED(_inp) ((_inp)->inp_rdata_mtx.mtx_lock & MTX_CONTESTED)
  235 
  236 #define SCTP_ASOC_CREATE_LOCK_CONTENDED(_inp) ((_inp)->inp_create_mtx.mtx_lock & MTX_CONTESTED)
  237 
  238 
  239 #define SCTP_ASOC_CREATE_LOCK_DESTROY(_inp) \
  240         mtx_destroy(&(_inp)->inp_create_mtx)
  241 
  242 
  243 #ifdef SCTP_LOCK_LOGGING
  244 #define SCTP_INP_RLOCK(_inp)    do {                                    \
  245         if(SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOCK_LOGGING_ENABLE) sctp_log_lock(_inp, (struct sctp_tcb *)NULL, SCTP_LOG_LOCK_INP);\
  246         mtx_lock(&(_inp)->inp_mtx);                                     \
  247 } while (0)
  248 
  249 #define SCTP_INP_WLOCK(_inp)    do {                                    \
  250         if(SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOCK_LOGGING_ENABLE) sctp_log_lock(_inp, (struct sctp_tcb *)NULL, SCTP_LOG_LOCK_INP);\
  251         mtx_lock(&(_inp)->inp_mtx);                                     \
  252 } while (0)
  253 
  254 #else
  255 
  256 #define SCTP_INP_RLOCK(_inp)    do {                                    \
  257         mtx_lock(&(_inp)->inp_mtx);                                     \
  258 } while (0)
  259 
  260 #define SCTP_INP_WLOCK(_inp)    do {                                    \
  261         mtx_lock(&(_inp)->inp_mtx);                                     \
  262 } while (0)
  263 
  264 #endif
  265 
  266 
  267 #define SCTP_TCB_SEND_LOCK_INIT(_tcb) \
  268         mtx_init(&(_tcb)->tcb_send_mtx, "sctp-send-tcb", "tcbs", MTX_DEF | MTX_DUPOK)
  269 
  270 #define SCTP_TCB_SEND_LOCK_DESTROY(_tcb) mtx_destroy(&(_tcb)->tcb_send_mtx)
  271 
  272 #define SCTP_TCB_SEND_LOCK(_tcb)  do { \
  273         mtx_lock(&(_tcb)->tcb_send_mtx); \
  274 } while (0)
  275 
  276 #define SCTP_TCB_SEND_UNLOCK(_tcb) mtx_unlock(&(_tcb)->tcb_send_mtx)
  277 
  278 #define SCTP_INP_INCR_REF(_inp) atomic_add_int(&((_inp)->refcount), 1)
  279 #define SCTP_INP_DECR_REF(_inp) atomic_add_int(&((_inp)->refcount), -1)
  280 
  281 
  282 #ifdef SCTP_LOCK_LOGGING
  283 #define SCTP_ASOC_CREATE_LOCK(_inp) \
  284         do {                                                            \
  285         if(SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOCK_LOGGING_ENABLE) sctp_log_lock(_inp, (struct sctp_tcb *)NULL, SCTP_LOG_LOCK_CREATE); \
  286                 mtx_lock(&(_inp)->inp_create_mtx);                      \
  287         } while (0)
  288 #else
  289 
  290 #define SCTP_ASOC_CREATE_LOCK(_inp) \
  291         do {                                                            \
  292                 mtx_lock(&(_inp)->inp_create_mtx);                      \
  293         } while (0)
  294 #endif
  295 
  296 #define SCTP_INP_RUNLOCK(_inp)          mtx_unlock(&(_inp)->inp_mtx)
  297 #define SCTP_INP_WUNLOCK(_inp)          mtx_unlock(&(_inp)->inp_mtx)
  298 #define SCTP_ASOC_CREATE_UNLOCK(_inp)   mtx_unlock(&(_inp)->inp_create_mtx)
  299 
  300 /*
  301  * For the majority of things (once we have found the association) we will
  302  * lock the actual association mutex. This will protect all the assoiciation
  303  * level queues and streams and such. We will need to lock the socket layer
  304  * when we stuff data up into the receiving sb_mb. I.e. we will need to do an
  305  * extra SOCKBUF_LOCK(&so->so_rcv) even though the association is locked.
  306  */
  307 
  308 #define SCTP_TCB_LOCK_INIT(_tcb) \
  309         mtx_init(&(_tcb)->tcb_mtx, "sctp-tcb", "tcb", MTX_DEF | MTX_DUPOK)
  310 
  311 #define SCTP_TCB_LOCK_DESTROY(_tcb)     mtx_destroy(&(_tcb)->tcb_mtx)
  312 
  313 #ifdef SCTP_LOCK_LOGGING
  314 #define SCTP_TCB_LOCK(_tcb)  do {                                       \
  315         if(SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOCK_LOGGING_ENABLE)  sctp_log_lock(_tcb->sctp_ep, _tcb, SCTP_LOG_LOCK_TCB);          \
  316         mtx_lock(&(_tcb)->tcb_mtx);                                     \
  317 } while (0)
  318 
  319 #else
  320 #define SCTP_TCB_LOCK(_tcb)  do {                                       \
  321         mtx_lock(&(_tcb)->tcb_mtx);                                     \
  322 } while (0)
  323 
  324 #endif
  325 
  326 
  327 #define SCTP_TCB_TRYLOCK(_tcb)  mtx_trylock(&(_tcb)->tcb_mtx)
  328 
  329 #define SCTP_TCB_UNLOCK(_tcb)           mtx_unlock(&(_tcb)->tcb_mtx)
  330 
  331 #define SCTP_TCB_UNLOCK_IFOWNED(_tcb)         do { \
  332                                                 if (mtx_owned(&(_tcb)->tcb_mtx)) \
  333                                                      mtx_unlock(&(_tcb)->tcb_mtx); \
  334                                               } while (0)
  335 
  336 
  337 
  338 #ifdef INVARIANTS
  339 #define SCTP_TCB_LOCK_ASSERT(_tcb) do { \
  340                             if (mtx_owned(&(_tcb)->tcb_mtx) == 0) \
  341                                 panic("Don't own TCB lock"); \
  342                             } while (0)
  343 #else
  344 #define SCTP_TCB_LOCK_ASSERT(_tcb)
  345 #endif
  346 
  347 #define SCTP_ITERATOR_LOCK_INIT() \
  348         mtx_init(&sctp_it_ctl.it_mtx, "sctp-it", "iterator", MTX_DEF)
  349 
  350 #ifdef INVARIANTS
  351 #define SCTP_ITERATOR_LOCK() \
  352         do {                                                            \
  353                 if (mtx_owned(&sctp_it_ctl.it_mtx))                     \
  354                         panic("Iterator Lock");                         \
  355                 mtx_lock(&sctp_it_ctl.it_mtx);                          \
  356         } while (0)
  357 #else
  358 #define SCTP_ITERATOR_LOCK() \
  359         do {                                                            \
  360                 mtx_lock(&sctp_it_ctl.it_mtx);                          \
  361         } while (0)
  362 
  363 #endif
  364 
  365 #define SCTP_ITERATOR_UNLOCK()          mtx_unlock(&sctp_it_ctl.it_mtx)
  366 #define SCTP_ITERATOR_LOCK_DESTROY()    mtx_destroy(&sctp_it_ctl.it_mtx)
  367 
  368 
  369 #define SCTP_WQ_ADDR_INIT() do { \
  370         mtx_init(&SCTP_BASE_INFO(wq_addr_mtx), "sctp-addr-wq","sctp_addr_wq",MTX_DEF); \
  371  } while (0)
  372 
  373 #define SCTP_WQ_ADDR_DESTROY() do  { \
  374         if(mtx_owned(&SCTP_BASE_INFO(wq_addr_mtx))) { \
  375              mtx_unlock(&SCTP_BASE_INFO(wq_addr_mtx)); \
  376         } \
  377             mtx_destroy(&SCTP_BASE_INFO(wq_addr_mtx)); \
  378       }  while (0)
  379 
  380 #define SCTP_WQ_ADDR_LOCK()     do { \
  381              mtx_lock(&SCTP_BASE_INFO(wq_addr_mtx));  \
  382 } while (0)
  383 #define SCTP_WQ_ADDR_UNLOCK() do { \
  384                 mtx_unlock(&SCTP_BASE_INFO(wq_addr_mtx)); \
  385 } while (0)
  386 
  387 
  388 
  389 #define SCTP_INCR_EP_COUNT() \
  390                 do { \
  391                        atomic_add_int(&SCTP_BASE_INFO(ipi_count_ep), 1); \
  392                 } while (0)
  393 
  394 #define SCTP_DECR_EP_COUNT() \
  395                 do { \
  396                        atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ep), 1); \
  397                 } while (0)
  398 
  399 #define SCTP_INCR_ASOC_COUNT() \
  400                 do { \
  401                        atomic_add_int(&SCTP_BASE_INFO(ipi_count_asoc), 1); \
  402                 } while (0)
  403 
  404 #define SCTP_DECR_ASOC_COUNT() \
  405                 do { \
  406                        atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_asoc), 1); \
  407                 } while (0)
  408 
  409 #define SCTP_INCR_LADDR_COUNT() \
  410                 do { \
  411                        atomic_add_int(&SCTP_BASE_INFO(ipi_count_laddr), 1); \
  412                 } while (0)
  413 
  414 #define SCTP_DECR_LADDR_COUNT() \
  415                 do { \
  416                        atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_laddr), 1); \
  417                 } while (0)
  418 
  419 #define SCTP_INCR_RADDR_COUNT() \
  420                 do { \
  421                        atomic_add_int(&SCTP_BASE_INFO(ipi_count_raddr), 1); \
  422                 } while (0)
  423 
  424 #define SCTP_DECR_RADDR_COUNT() \
  425                 do { \
  426                        atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_raddr),1); \
  427                 } while (0)
  428 
  429 #define SCTP_INCR_CHK_COUNT() \
  430                 do { \
  431                        atomic_add_int(&SCTP_BASE_INFO(ipi_count_chunk), 1); \
  432                 } while (0)
  433 #ifdef INVARIANTS
  434 #define SCTP_DECR_CHK_COUNT() \
  435                 do { \
  436                        if(SCTP_BASE_INFO(ipi_count_chunk) == 0) \
  437                              panic("chunk count to 0?");    \
  438                        atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_chunk), 1); \
  439                 } while (0)
  440 #else
  441 #define SCTP_DECR_CHK_COUNT() \
  442                 do { \
  443                        if(SCTP_BASE_INFO(ipi_count_chunk) != 0) \
  444                        atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_chunk), 1); \
  445                 } while (0)
  446 #endif
  447 #define SCTP_INCR_READQ_COUNT() \
  448                 do { \
  449                        atomic_add_int(&SCTP_BASE_INFO(ipi_count_readq),1); \
  450                 } while (0)
  451 
  452 #define SCTP_DECR_READQ_COUNT() \
  453                 do { \
  454                        atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_readq), 1); \
  455                 } while (0)
  456 
  457 #define SCTP_INCR_STRMOQ_COUNT() \
  458                 do { \
  459                        atomic_add_int(&SCTP_BASE_INFO(ipi_count_strmoq), 1); \
  460                 } while (0)
  461 
  462 #define SCTP_DECR_STRMOQ_COUNT() \
  463                 do { \
  464                        atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_strmoq), 1); \
  465                 } while (0)
  466 
  467 
  468 #if defined(SCTP_SO_LOCK_TESTING)
  469 #define SCTP_INP_SO(sctpinp)    (sctpinp)->ip_inp.inp.inp_socket
  470 #define SCTP_SOCKET_LOCK(so, refcnt)
  471 #define SCTP_SOCKET_UNLOCK(so, refcnt)
  472 #endif
  473 
  474 #endif
Cache object: 6e6a2f696b8028b82f30a3127ae5af96
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This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.
FreeBSD/Linux Kernel Cross Reference sys/netinet/sctp_lock_bsd.h

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