sys/kern/uipc_msg.c

   1 /*
   2  * Copyright (c) 2003, 2004 Jeffrey M. Hsu.  All rights reserved.
   3  * Copyright (c) 2003, 2004 The DragonFly Project.  All rights reserved.
   4  *
   5  * This code is derived from software contributed to The DragonFly Project
   6  * by Jeffrey M. Hsu.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. Neither the name of The DragonFly Project 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
  22  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  23  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
  24  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  25  * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
  26  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  27  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  28  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  29  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  30  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #include <sys/param.h>
  35 #include <sys/systm.h>
  36 #include <sys/kernel.h>
  37 #include <sys/msgport.h>
  38 #include <sys/protosw.h>
  39 #include <sys/socket.h>
  40 #include <sys/socketvar.h>
  41 #include <sys/socketops.h>
  42 #include <sys/thread.h>
  43 #include <sys/thread2.h>
  44 #include <sys/msgport2.h>
  45 #include <sys/spinlock2.h>
  46 #include <sys/mbuf.h>
  47 #include <vm/pmap.h>
  48 #include <net/netmsg2.h>
  49
  50 #include <net/netisr.h>
  51 #include <net/netmsg.h>
  52
  53 /*
  54  * Abort a socket and free it.  Called from soabort() only.  soabort()
  55  * got a ref on the socket which we must free on reply.
  56  */
  57 void
  58 so_pru_abort(struct socket *so)
  59 {
  60         struct netmsg_pru_abort msg;
  61
  62         netmsg_init(&msg.base, so, &curthread->td_msgport,
  63                     0, so->so_proto->pr_usrreqs->pru_abort);
  64         (void)lwkt_domsg(so->so_port, &msg.base.lmsg, 0);
  65         sofree(msg.base.nm_so);
  66 }
  67
  68 /*
  69  * Abort a socket and free it, asynchronously.  Called from
  70  * soaborta() only.  soaborta() got a ref on the socket which we must
  71  * free on reply.
  72  */
  73 void
  74 so_pru_aborta(struct socket *so)
  75 {
  76         struct netmsg_pru_abort *msg;
  77
  78         msg = kmalloc(sizeof(*msg), M_LWKTMSG, M_WAITOK | M_ZERO);
  79         netmsg_init(&msg->base, so, &netisr_afree_free_so_rport,
  80                     0, so->so_proto->pr_usrreqs->pru_abort);
  81         lwkt_sendmsg(so->so_port, &msg->base.lmsg);
  82 }
  83
  84 /*
  85  * Abort a socket and free it.  Called from soabort_oncpu() only.
  86  * Caller must make sure that the current CPU is inpcb's owner CPU.
  87  */
  88 void
  89 so_pru_abort_oncpu(struct socket *so)
  90 {
  91         struct netmsg_pru_abort msg;
  92         netisr_fn_t func = so->so_proto->pr_usrreqs->pru_abort;
  93
  94         netmsg_init(&msg.base, so, &netisr_adone_rport, 0, func);
  95         msg.base.lmsg.ms_flags &= ~(MSGF_REPLY | MSGF_DONE);
  96         msg.base.lmsg.ms_flags |= MSGF_SYNC;
  97         func((netmsg_t)&msg);
  98         KKASSERT(msg.base.lmsg.ms_flags & MSGF_DONE);
  99         sofree(msg.base.nm_so);
 100 }
 101
 102 int
 103 so_pru_accept(struct socket *so, struct sockaddr **nam)
 104 {
 105         struct netmsg_pru_accept msg;
 106
 107         netmsg_init(&msg.base, so, &curthread->td_msgport,
 108             0, so->so_proto->pr_usrreqs->pru_accept);
 109         msg.nm_nam = nam;
 110
 111         return lwkt_domsg(so->so_port, &msg.base.lmsg, 0);
 112 }
 113
 114 int
 115 so_pru_attach(struct socket *so, int proto, struct pru_attach_info *ai)
 116 {
 117         struct netmsg_pru_attach msg;
 118         int error;
 119
 120         netmsg_init(&msg.base, so, &curthread->td_msgport,
 121                     0, so->so_proto->pr_usrreqs->pru_attach);
 122         msg.nm_proto = proto;
 123         msg.nm_ai = ai;
 124         error = lwkt_domsg(so->so_port, &msg.base.lmsg, 0);
 125         return (error);
 126 }
 127
 128 int
 129 so_pru_attach_direct(struct socket *so, int proto, struct pru_attach_info *ai)
 130 {
 131         struct netmsg_pru_attach msg;
 132         netisr_fn_t func = so->so_proto->pr_usrreqs->pru_attach;
 133
 134         netmsg_init(&msg.base, so, &netisr_adone_rport, 0, func);
 135         msg.base.lmsg.ms_flags &= ~(MSGF_REPLY | MSGF_DONE);
 136         msg.base.lmsg.ms_flags |= MSGF_SYNC;
 137         msg.nm_proto = proto;
 138         msg.nm_ai = ai;
 139         func((netmsg_t)&msg);
 140         KKASSERT(msg.base.lmsg.ms_flags & MSGF_DONE);
 141         return(msg.base.lmsg.ms_error);
 142 }
 143
 144 /*
 145  * NOTE: If the target port changes the bind operation will deal with it.
 146  */
 147 int
 148 so_pru_bind(struct socket *so, struct sockaddr *nam, struct thread *td)
 149 {
 150         struct netmsg_pru_bind msg;
 151         int error;
 152
 153         netmsg_init(&msg.base, so, &curthread->td_msgport,
 154                     0, so->so_proto->pr_usrreqs->pru_bind);
 155         msg.nm_nam = nam;
 156         msg.nm_td = td;         /* used only for prison_ip() */
 157         error = lwkt_domsg(so->so_port, &msg.base.lmsg, 0);
 158         return (error);
 159 }
 160
 161 int
 162 so_pru_connect(struct socket *so, struct sockaddr *nam, struct thread *td)
 163 {
 164         struct netmsg_pru_connect msg;
 165         int error;
 166
 167         netmsg_init(&msg.base, so, &curthread->td_msgport,
 168                     0, so->so_proto->pr_usrreqs->pru_connect);
 169         msg.nm_nam = nam;
 170         msg.nm_td = td;
 171         msg.nm_m = NULL;
 172         msg.nm_flags = 0;
 173         msg.nm_reconnect = 0;
 174         error = lwkt_domsg(so->so_port, &msg.base.lmsg, 0);
 175         return (error);
 176 }
 177
 178 int
 179 so_pru_connect2(struct socket *so1, struct socket *so2)
 180 {
 181         struct netmsg_pru_connect2 msg;
 182         int error;
 183
 184         netmsg_init(&msg.base, so1, &curthread->td_msgport,
 185                     0, so1->so_proto->pr_usrreqs->pru_connect2);
 186         msg.nm_so1 = so1;
 187         msg.nm_so2 = so2;
 188         error = lwkt_domsg(so1->so_port, &msg.base.lmsg, 0);
 189         return (error);
 190 }
 191
 192 /*
 193  * WARNING!  Synchronous call from user context.  Control function may do
 194  *           copyin/copyout.
 195  */
 196 int
 197 so_pru_control_direct(struct socket *so, u_long cmd, caddr_t data,
 198                       struct ifnet *ifp)
 199 {
 200         struct netmsg_pru_control msg;
 201         netisr_fn_t func = so->so_proto->pr_usrreqs->pru_control;
 202
 203         netmsg_init(&msg.base, so, &netisr_adone_rport, 0, func);
 204         msg.base.lmsg.ms_flags &= ~(MSGF_REPLY | MSGF_DONE);
 205         msg.base.lmsg.ms_flags |= MSGF_SYNC;
 206         msg.nm_cmd = cmd;
 207         msg.nm_data = data;
 208         msg.nm_ifp = ifp;
 209         msg.nm_td = curthread;
 210         func((netmsg_t)&msg);
 211         KKASSERT(msg.base.lmsg.ms_flags & MSGF_DONE);
 212         return(msg.base.lmsg.ms_error);
 213 }
 214
 215 int
 216 so_pru_detach(struct socket *so)
 217 {
 218         struct netmsg_pru_detach msg;
 219         int error;
 220
 221         netmsg_init(&msg.base, so, &curthread->td_msgport,
 222                     0, so->so_proto->pr_usrreqs->pru_detach);
 223         error = lwkt_domsg(so->so_port, &msg.base.lmsg, 0);
 224         return (error);
 225 }
 226
 227 void
 228 so_pru_detach_direct(struct socket *so)
 229 {
 230         struct netmsg_pru_detach msg;
 231         netisr_fn_t func = so->so_proto->pr_usrreqs->pru_detach;
 232
 233         netmsg_init(&msg.base, so, &netisr_adone_rport, 0, func);
 234         msg.base.lmsg.ms_flags &= ~(MSGF_REPLY | MSGF_DONE);
 235         msg.base.lmsg.ms_flags |= MSGF_SYNC;
 236         func((netmsg_t)&msg);
 237         KKASSERT(msg.base.lmsg.ms_flags & MSGF_DONE);
 238 }
 239
 240 int
 241 so_pru_disconnect(struct socket *so)
 242 {
 243         struct netmsg_pru_disconnect msg;
 244         int error;
 245
 246         netmsg_init(&msg.base, so, &curthread->td_msgport,
 247                     0, so->so_proto->pr_usrreqs->pru_disconnect);
 248         error = lwkt_domsg(so->so_port, &msg.base.lmsg, 0);
 249         return (error);
 250 }
 251
 252 void
 253 so_pru_disconnect_direct(struct socket *so)
 254 {
 255         struct netmsg_pru_disconnect msg;
 256         netisr_fn_t func = so->so_proto->pr_usrreqs->pru_disconnect;
 257
 258         netmsg_init(&msg.base, so, &netisr_adone_rport, 0, func);
 259         msg.base.lmsg.ms_flags &= ~(MSGF_REPLY | MSGF_DONE);
 260         msg.base.lmsg.ms_flags |= MSGF_SYNC;
 261         func((netmsg_t)&msg);
 262         KKASSERT(msg.base.lmsg.ms_flags & MSGF_DONE);
 263 }
 264
 265 int
 266 so_pru_listen(struct socket *so, struct thread *td)
 267 {
 268         struct netmsg_pru_listen msg;
 269         int error;
 270
 271         netmsg_init(&msg.base, so, &curthread->td_msgport,
 272                     0, so->so_proto->pr_usrreqs->pru_listen);
 273         msg.nm_td = td;         /* used only for prison_ip() XXX JH */
 274         error = lwkt_domsg(so->so_port, &msg.base.lmsg, 0);
 275         return (error);
 276 }
 277
 278 int
 279 so_pru_peeraddr(struct socket *so, struct sockaddr **nam)
 280 {
 281         struct netmsg_pru_peeraddr msg;
 282         int error;
 283
 284         netmsg_init(&msg.base, so, &curthread->td_msgport,
 285                     0, so->so_proto->pr_usrreqs->pru_peeraddr);
 286         msg.nm_nam = nam;
 287         error = lwkt_domsg(so->so_port, &msg.base.lmsg, 0);
 288         return (error);
 289 }
 290
 291 int
 292 so_pru_rcvd(struct socket *so, int flags)
 293 {
 294         struct netmsg_pru_rcvd msg;
 295         int error;
 296
 297         netmsg_init(&msg.base, so, &curthread->td_msgport,
 298                     0, so->so_proto->pr_usrreqs->pru_rcvd);
 299         msg.nm_flags = flags;
 300         msg.nm_pru_flags = 0;
 301         error = lwkt_domsg(so->so_port, &msg.base.lmsg, 0);
 302         return (error);
 303 }
 304
 305 void
 306 so_pru_rcvd_async(struct socket *so)
 307 {
 308         lwkt_msg_t lmsg = &so->so_rcvd_msg.base.lmsg;
 309
 310         KASSERT(so->so_proto->pr_flags & PR_ASYNC_RCVD,
 311             ("async pru_rcvd is not supported"));
 312
 313         spin_lock(&so->so_rcvd_spin);
 314         if ((so->so_rcvd_msg.nm_pru_flags & PRUR_DEAD) == 0) {
 315                 if (lmsg->ms_flags & MSGF_DONE)
 316                         lwkt_sendmsg(so->so_port, lmsg);
 317         } else {
 318                 static int deadlog = 0;
 319
 320                 if (!deadlog) {
 321                         kprintf("async rcvd is dead\n");
 322                         deadlog = 1;
 323                 }
 324         }
 325         spin_unlock(&so->so_rcvd_spin);
 326 }
 327
 328 int
 329 so_pru_rcvoob(struct socket *so, struct mbuf *m, int flags)
 330 {
 331         struct netmsg_pru_rcvoob msg;
 332         int error;
 333
 334         netmsg_init(&msg.base, so, &curthread->td_msgport,
 335                     0, so->so_proto->pr_usrreqs->pru_rcvoob);
 336         msg.nm_m = m;
 337         msg.nm_flags = flags;
 338         error = lwkt_domsg(so->so_port, &msg.base.lmsg, 0);
 339         return (error);
 340 }
 341
 342 /*
 343  * NOTE: If the target port changes the implied connect will deal with it.
 344  */
 345 int
 346 so_pru_send(struct socket *so, int flags, struct mbuf *m,
 347             struct sockaddr *addr, struct mbuf *control, struct thread *td)
 348 {
 349         struct netmsg_pru_send msg;
 350         int error;
 351
 352         netmsg_init(&msg.base, so, &curthread->td_msgport,
 353                     0, so->so_proto->pr_usrreqs->pru_send);
 354         msg.nm_flags = flags;
 355         msg.nm_m = m;
 356         msg.nm_addr = addr;
 357         msg.nm_control = control;
 358         msg.nm_td = td;
 359         error = lwkt_domsg(so->so_port, &msg.base.lmsg, 0);
 360         return (error);
 361 }
 362
 363 void
 364 so_pru_sync(struct socket *so)
 365 {
 366         struct netmsg_base msg;
 367
 368         netmsg_init(&msg, so, &curthread->td_msgport, 0,
 369             netmsg_sync_handler);
 370         lwkt_domsg(so->so_port, &msg.lmsg, 0);
 371 }
 372
 373 void
 374 so_pru_send_async(struct socket *so, int flags, struct mbuf *m,
 375             struct sockaddr *addr0, struct mbuf *control, struct thread *td)
 376 {
 377         struct netmsg_pru_send *msg;
 378         struct sockaddr *addr = NULL;
 379
 380         KASSERT(so->so_proto->pr_flags & PR_ASYNC_SEND,
 381             ("async pru_send is not supported"));
 382
 383         flags |= PRUS_NOREPLY;
 384         if (addr0 != NULL) {
 385                 addr = kmalloc(addr0->sa_len, M_SONAME, M_WAITOK);
 386                 memcpy(addr, addr0, addr0->sa_len);
 387                 flags |= PRUS_FREEADDR;
 388         }
 389
 390         msg = &m->m_hdr.mh_sndmsg;
 391         netmsg_init(&msg->base, so, &netisr_apanic_rport,
 392                     0, so->so_proto->pr_usrreqs->pru_send);
 393         msg->nm_flags = flags;
 394         msg->nm_m = m;
 395         msg->nm_addr = addr;
 396         msg->nm_control = control;
 397         msg->nm_td = td;
 398         lwkt_sendmsg(so->so_port, &msg->base.lmsg);
 399 }
 400
 401 int
 402 so_pru_sense(struct socket *so, struct stat *sb)
 403 {
 404         struct netmsg_pru_sense msg;
 405         int error;
 406
 407         netmsg_init(&msg.base, so, &curthread->td_msgport,
 408                     0, so->so_proto->pr_usrreqs->pru_sense);
 409         msg.nm_stat = sb;
 410         error = lwkt_domsg(so->so_port, &msg.base.lmsg, 0);
 411         return (error);
 412 }
 413
 414 int
 415 so_pru_shutdown(struct socket *so)
 416 {
 417         struct netmsg_pru_shutdown msg;
 418         int error;
 419
 420         netmsg_init(&msg.base, so, &curthread->td_msgport,
 421                     0, so->so_proto->pr_usrreqs->pru_shutdown);
 422         error = lwkt_domsg(so->so_port, &msg.base.lmsg, 0);
 423         return (error);
 424 }
 425
 426 int
 427 so_pru_sockaddr(struct socket *so, struct sockaddr **nam)
 428 {
 429         struct netmsg_pru_sockaddr msg;
 430         int error;
 431
 432         netmsg_init(&msg.base, so, &curthread->td_msgport,
 433                     0, so->so_proto->pr_usrreqs->pru_sockaddr);
 434         msg.nm_nam = nam;
 435         error = lwkt_domsg(so->so_port, &msg.base.lmsg, 0);
 436         return (error);
 437 }
 438
 439 int
 440 so_pr_ctloutput(struct socket *so, struct sockopt *sopt)
 441 {
 442         struct netmsg_pr_ctloutput msg;
 443         int error;
 444
 445         KKASSERT(!sopt->sopt_val || kva_p(sopt->sopt_val));
 446         netmsg_init(&msg.base, so, &curthread->td_msgport,
 447                     0, so->so_proto->pr_ctloutput);
 448         msg.nm_sopt = sopt;
 449         error = lwkt_domsg(so->so_port, &msg.base.lmsg, 0);
 450         return (error);
 451 }
 452
 453 /*
 454  * Protocol control input, typically via icmp.
 455  *
 456  * If the protocol pr_ctlport is not NULL we call it to figure out the
 457  * protocol port.  If NULL is returned we can just return, otherwise
 458  * we issue a netmsg to call pr_ctlinput in the proper thread.
 459  *
 460  * This must be done synchronously as arg and/or extra may point to
 461  * temporary data.
 462  */
 463 void
 464 so_pru_ctlinput(struct protosw *pr, int cmd, struct sockaddr *arg, void *extra)
 465 {
 466         struct netmsg_pru_ctlinput msg;
 467         lwkt_port_t port;
 468
 469         if (pr->pr_ctlport == NULL)
 470                 return;
 471         KKASSERT(pr->pr_ctlinput != NULL);
 472         port = pr->pr_ctlport(cmd, arg, extra);
 473         if (port == NULL)
 474                 return;
 475         netmsg_init(&msg.base, NULL, &curthread->td_msgport,
 476                     0, pr->pr_ctlinput);
 477         msg.nm_cmd = cmd;
 478         msg.nm_arg = arg;
 479         msg.nm_extra = extra;
 480         lwkt_domsg(port, &msg.base.lmsg, 0);
 481 }
 482
 483 /*
 484  * If we convert all the protosw pr_ functions for all the protocols
 485  * to take a message directly, this layer can go away.  For the moment
 486  * our dispatcher ignores the return value, but since we are handling
 487  * the replymsg ourselves we return EASYNC by convention.
 488  */
 489
 490 /*
 491  * Handle a predicate event request.  This function is only called once
 492  * when the predicate message queueing request is received.
 493  */
 494 void
 495 netmsg_so_notify(netmsg_t msg)
 496 {
 497         struct lwkt_token *tok;
 498         struct signalsockbuf *ssb;
 499
 500         ssb = (msg->notify.nm_etype & NM_REVENT) ?
 501                         &msg->base.nm_so->so_rcv :
 502                         &msg->base.nm_so->so_snd;
 503
 504         /*
 505          * Reply immediately if the event has occured, otherwise queue the
 506          * request.
 507          *
 508          * NOTE: Socket can change if this is an accept predicate so cache
 509          *       the token.
 510          */
 511         tok = lwkt_token_pool_lookup(msg->base.nm_so);
 512         lwkt_gettoken(tok);
 513         if (msg->notify.nm_predicate(&msg->notify)) {
 514                 lwkt_reltoken(tok);
 515                 lwkt_replymsg(&msg->base.lmsg,
 516                               msg->base.lmsg.ms_error);
 517         } else {
 518                 TAILQ_INSERT_TAIL(&ssb->ssb_kq.ki_mlist, &msg->notify, nm_list);
 519                 atomic_set_int(&ssb->ssb_flags, SSB_MEVENT);
 520                 lwkt_reltoken(tok);
 521         }
 522 }
 523
 524 /*
 525  * Called by doio when trying to abort a netmsg_so_notify message.
 526  * Unlike the other functions this one is dispatched directly by
 527  * the LWKT subsystem, so it takes a lwkt_msg_t as an argument.
 528  *
 529  * The original message, lmsg, is under the control of the caller and
 530  * will not be destroyed until we return so we can safely reference it
 531  * in our synchronous abort request.
 532  *
 533  * This part of the abort request occurs on the originating cpu which
 534  * means we may race the message flags and the original message may
 535  * not even have been processed by the target cpu yet.
 536  */
 537 void
 538 netmsg_so_notify_doabort(lwkt_msg_t lmsg)
 539 {
 540         struct netmsg_so_notify_abort msg;
 541
 542         if ((lmsg->ms_flags & (MSGF_DONE | MSGF_REPLY)) == 0) {
 543                 netmsg_init(&msg.base, NULL, &curthread->td_msgport,
 544                             0, netmsg_so_notify_abort);
 545                 msg.nm_notifymsg = (void *)lmsg;
 546                 lwkt_domsg(lmsg->ms_target_port, &msg.base.lmsg, 0);
 547         }
 548 }
 549
 550 /*
 551  * Predicate requests can be aborted.  This function is only called once
 552  * and will interlock against processing/reply races (since such races
 553  * occur on the same thread that controls the port where the abort is
 554  * requeued).
 555  *
 556  * This part of the abort request occurs on the target cpu.  The message
 557  * flags must be tested again in case the test that we did on the
 558  * originating cpu raced.  Since messages are handled in sequence, the
 559  * original message will have already been handled by the loop and either
 560  * replied to or queued.
 561  *
 562  * We really only need to interlock with MSGF_REPLY (a bit that is set on
 563  * our cpu when we reply).  Note that MSGF_DONE is not set until the
 564  * reply reaches the originating cpu.  Test both bits anyway.
 565  */
 566 void
 567 netmsg_so_notify_abort(netmsg_t msg)
 568 {
 569         struct netmsg_so_notify_abort *abrtmsg = &msg->notify_abort;
 570         struct netmsg_so_notify *nmsg = abrtmsg->nm_notifymsg;
 571         struct signalsockbuf *ssb;
 572
 573         /*
 574          * The original notify message is not destroyed until after the
 575          * abort request is returned, so we can check its state.
 576          */
 577         lwkt_getpooltoken(nmsg->base.nm_so);
 578         if ((nmsg->base.lmsg.ms_flags & (MSGF_DONE | MSGF_REPLY)) == 0) {
 579                 ssb = (nmsg->nm_etype & NM_REVENT) ?
 580                                 &nmsg->base.nm_so->so_rcv :
 581                                 &nmsg->base.nm_so->so_snd;
 582                 TAILQ_REMOVE(&ssb->ssb_kq.ki_mlist, nmsg, nm_list);
 583                 lwkt_relpooltoken(nmsg->base.nm_so);
 584                 lwkt_replymsg(&nmsg->base.lmsg, EINTR);
 585         } else {
 586                 lwkt_relpooltoken(nmsg->base.nm_so);
 587         }
 588
 589         /*
 590          * Reply to the abort message
 591          */
 592         lwkt_replymsg(&abrtmsg->base.lmsg, 0);
 593 }
 594
 595 void
 596 so_async_rcvd_reply(struct socket *so)
 597 {
 598         spin_lock(&so->so_rcvd_spin);
 599         lwkt_replymsg(&so->so_rcvd_msg.base.lmsg, 0);
 600         spin_unlock(&so->so_rcvd_spin);
 601 }
 602
 603 void
 604 so_async_rcvd_drop(struct socket *so)
 605 {
 606         lwkt_msg_t lmsg = &so->so_rcvd_msg.base.lmsg;
 607
 608         spin_lock(&so->so_rcvd_spin);
 609         if ((lmsg->ms_flags & MSGF_DONE) == 0)
 610                 lwkt_dropmsg(lmsg);
 611         so->so_rcvd_msg.nm_pru_flags |= PRUR_DEAD;
 612         spin_unlock(&so->so_rcvd_spin);
 613 }