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  * $DragonFly: src/sys/kern/uipc_msg.c,v 1.26 2008/10/27 02:56:30 sephe Exp $
  34  */
  35
  36 #include <sys/param.h>
  37 #include <sys/systm.h>
  38 #include <sys/kernel.h>
  39 #include <sys/msgport.h>
  40 #include <sys/protosw.h>
  41 #include <sys/socket.h>
  42 #include <sys/socketvar.h>
  43 #include <sys/socketops.h>
  44 #include <sys/thread.h>
  45 #include <sys/thread2.h>
  46 #include <sys/msgport2.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.
  55  *
  56  * The SS_ABORTING flag must already be set.
  57  */
  58 void
  59 so_pru_abort(struct socket *so)
  60 {
  61         struct netmsg_pru_abort msg;
  62
  63         KKASSERT(so->so_state & SS_ABORTING);
  64         netmsg_init(&msg.nm_netmsg, so, &curthread->td_msgport,
  65                     0, netmsg_pru_abort);
  66         msg.nm_prufn = so->so_proto->pr_usrreqs->pru_abort;
  67         (void)lwkt_domsg(so->so_port, &msg.nm_netmsg.nm_lmsg, 0);
  68 }
  69
  70 /*
  71  * Abort a socket and free it, asynchronously.  Called from
  72  * soaborta() only.
  73  *
  74  * The SS_ABORTING flag must already be set.
  75  */
  76 void
  77 so_pru_aborta(struct socket *so)
  78 {
  79         struct netmsg_pru_abort *msg;
  80
  81         KKASSERT(so->so_state & SS_ABORTING);
  82         msg = kmalloc(sizeof(*msg), M_LWKTMSG, M_WAITOK | M_ZERO);
  83         netmsg_init(&msg->nm_netmsg, so, &netisr_afree_rport,
  84                     0, netmsg_pru_abort);
  85         msg->nm_prufn = so->so_proto->pr_usrreqs->pru_abort;
  86         lwkt_sendmsg(so->so_port, &msg->nm_netmsg.nm_lmsg);
  87 }
  88
  89 /*
  90  * Abort a socket and free it.  Called from soabort_oncpu() only.
  91  * Caller must make sure that the current CPU is inpcb's owner CPU.
  92  *
  93  * The SS_ABORTING flag must already be set.
  94  */
  95 void
  96 so_pru_abort_oncpu(struct socket *so)
  97 {
  98         so->so_proto->pr_usrreqs->pru_abort(so);
  99 }
 100
 101 int
 102 so_pru_accept(struct socket *so, struct sockaddr **nam)
 103 {
 104         /* Block (memory allocation) in process context. XXX JH */
 105         return ((*so->so_proto->pr_usrreqs->pru_accept)(so, nam));
 106
 107 #ifdef notdef
 108         int error;
 109         struct netmsg_pru_accept msg;
 110
 111         netmsg_init(&msg.nm_netmsg, so, &curthread->td_msgport,
 112                     0, netmsg_pru_accept);
 113         msg.nm_prufn = so->so_proto->pr_usrreqs->pru_accept;
 114         msg.nm_nam = nam;
 115         error = lwkt_domsg(so->so_port, &msg.nm_netmsg.nm_lmsg, 0);
 116         return (error);
 117 #endif
 118 }
 119
 120 int
 121 so_pru_attach(struct socket *so, int proto, struct pru_attach_info *ai)
 122 {
 123         int error;
 124         struct netmsg_pru_attach msg;
 125
 126         netmsg_init(&msg.nm_netmsg, so, &curthread->td_msgport,
 127                     0, netmsg_pru_attach);
 128         msg.nm_prufn = so->so_proto->pr_usrreqs->pru_attach;
 129         msg.nm_proto = proto;
 130         msg.nm_ai = ai;
 131         error = lwkt_domsg(so->so_port, &msg.nm_netmsg.nm_lmsg, 0);
 132         return (error);
 133 }
 134
 135 /*
 136  * NOTE: If the target port changes the bind operation will deal with it.
 137  */
 138 int
 139 so_pru_bind(struct socket *so, struct sockaddr *nam, struct thread *td)
 140 {
 141         int error;
 142         struct netmsg_pru_bind msg;
 143
 144 #if 0
 145         port = so->so_proto->pr_mport(NULL, nam, NULL);
 146 #endif
 147         netmsg_init(&msg.nm_netmsg, so, &curthread->td_msgport,
 148                     0, netmsg_pru_bind);
 149         msg.nm_prufn = so->so_proto->pr_usrreqs->pru_bind;
 150         msg.nm_nam = nam;
 151         msg.nm_td = td;         /* used only for prison_ip() XXX JH */
 152         error = lwkt_domsg(so->so_port, &msg.nm_netmsg.nm_lmsg, 0);
 153         return (error);
 154 }
 155
 156 int
 157 so_pru_connect(struct socket *so, struct sockaddr *nam, struct thread *td)
 158 {
 159         int error;
 160         struct netmsg_pru_connect msg;
 161
 162         netmsg_init(&msg.nm_netmsg, so, &curthread->td_msgport,
 163                     0, netmsg_pru_connect);
 164         msg.nm_prufn = so->so_proto->pr_usrreqs->pru_connect;
 165         msg.nm_nam = nam;
 166         msg.nm_td = td;
 167         error = lwkt_domsg(so->so_port, &msg.nm_netmsg.nm_lmsg, 0);
 168         return (error);
 169 }
 170
 171 int
 172 so_pru_connect2(struct socket *so1, struct socket *so2)
 173 {
 174         int error;
 175         struct netmsg_pru_connect2 msg;
 176
 177         netmsg_init(&msg.nm_netmsg, so1, &curthread->td_msgport,
 178                     0, netmsg_pru_connect2);
 179         msg.nm_prufn = so1->so_proto->pr_usrreqs->pru_connect2;
 180         msg.nm_so1 = so1;
 181         msg.nm_so2 = so2;
 182         error = lwkt_domsg(so1->so_port, &msg.nm_netmsg.nm_lmsg, 0);
 183         return (error);
 184 }
 185
 186 int
 187 so_pru_control(struct socket *so, u_long cmd, caddr_t data, struct ifnet *ifp)
 188 {
 189         return ((*so->so_proto->pr_usrreqs->pru_control)(
 190                         so, cmd, data, ifp, curthread));
 191 #ifdef gag      /* does copyin and copyout deep inside stack XXX JH */
 192         int error;
 193         struct netmsg_pru_control msg;
 194
 195         netmsg_init(&msg.nm_netmsg, so, &curthread->td_msgport,
 196                     0, netmsg_pru_control);
 197         msg.nm_prufn = so->so_proto->pr_usrreqs->pru_control;
 198         msg.nm_cmd = cmd;
 199         msg.nm_data = data;
 200         msg.nm_ifp = ifp;
 201         msg.nm_td = td;
 202         error = lwkt_domsg(so->so_port, &msg.nm_netmsg.nm_lmsg, 0);
 203         return (error);
 204 #endif
 205 }
 206
 207 int
 208 so_pru_detach(struct socket *so)
 209 {
 210         int error;
 211         struct netmsg_pru_detach msg;
 212
 213         netmsg_init(&msg.nm_netmsg, so, &curthread->td_msgport,
 214                     0, netmsg_pru_detach);
 215         msg.nm_prufn = so->so_proto->pr_usrreqs->pru_detach;
 216         error = lwkt_domsg(so->so_port, &msg.nm_netmsg.nm_lmsg, 0);
 217         return (error);
 218 }
 219
 220 int
 221 so_pru_disconnect(struct socket *so)
 222 {
 223         int error;
 224         struct netmsg_pru_disconnect msg;
 225
 226         netmsg_init(&msg.nm_netmsg, so, &curthread->td_msgport,
 227                     0, netmsg_pru_disconnect);
 228         msg.nm_prufn = so->so_proto->pr_usrreqs->pru_disconnect;
 229         error = lwkt_domsg(so->so_port, &msg.nm_netmsg.nm_lmsg, 0);
 230         return (error);
 231 }
 232
 233 int
 234 so_pru_listen(struct socket *so, struct thread *td)
 235 {
 236         int error;
 237         struct netmsg_pru_listen msg;
 238
 239         netmsg_init(&msg.nm_netmsg, so, &curthread->td_msgport,
 240                     0, netmsg_pru_listen);
 241         msg.nm_prufn = so->so_proto->pr_usrreqs->pru_listen;
 242         msg.nm_td = td;         /* used only for prison_ip() XXX JH */
 243         error = lwkt_domsg(so->so_port, &msg.nm_netmsg.nm_lmsg, 0);
 244         return (error);
 245 }
 246
 247 int
 248 so_pru_peeraddr(struct socket *so, struct sockaddr **nam)
 249 {
 250         int error;
 251         struct netmsg_pru_peeraddr msg;
 252
 253         netmsg_init(&msg.nm_netmsg, so, &curthread->td_msgport,
 254                     0, netmsg_pru_peeraddr);
 255         msg.nm_prufn = so->so_proto->pr_usrreqs->pru_peeraddr;
 256         msg.nm_nam = nam;
 257         error = lwkt_domsg(so->so_port, &msg.nm_netmsg.nm_lmsg, 0);
 258         return (error);
 259 }
 260
 261 int
 262 so_pru_rcvd(struct socket *so, int flags)
 263 {
 264         int error;
 265         struct netmsg_pru_rcvd msg;
 266
 267         netmsg_init(&msg.nm_netmsg, so, &curthread->td_msgport,
 268                     0, netmsg_pru_rcvd);
 269         msg.nm_prufn = so->so_proto->pr_usrreqs->pru_rcvd;
 270         msg.nm_flags = flags;
 271         error = lwkt_domsg(so->so_port, &msg.nm_netmsg.nm_lmsg, 0);
 272         return (error);
 273 }
 274
 275 int
 276 so_pru_rcvoob(struct socket *so, struct mbuf *m, int flags)
 277 {
 278         int error;
 279         struct netmsg_pru_rcvoob msg;
 280
 281         netmsg_init(&msg.nm_netmsg, so, &curthread->td_msgport,
 282                     0, netmsg_pru_rcvoob);
 283         msg.nm_prufn = so->so_proto->pr_usrreqs->pru_rcvoob;
 284         msg.nm_m = m;
 285         msg.nm_flags = flags;
 286         error = lwkt_domsg(so->so_port, &msg.nm_netmsg.nm_lmsg, 0);
 287         return (error);
 288 }
 289
 290 /*
 291  * NOTE: so_pru_send() is the only code which uses pr_mport() now.
 292  *
 293  * NOTE: If the target port changes the implied connect will deal with it.
 294  */
 295 int
 296 so_pru_send(struct socket *so, int flags, struct mbuf *m,
 297             struct sockaddr *addr, struct mbuf *control, struct thread *td)
 298 {
 299         int error;
 300         struct netmsg_pru_send msg;
 301         lwkt_port_t port;
 302
 303         port = so->so_proto->pr_mport(so, addr, &m);
 304         if (port == NULL) {
 305                 KKASSERT(m == NULL);
 306                 return EINVAL;
 307         }
 308
 309         netmsg_init(&msg.nm_netmsg, so, &curthread->td_msgport,
 310                     0, netmsg_pru_send);
 311         msg.nm_prufn = so->so_proto->pr_usrreqs->pru_send;
 312         msg.nm_flags = flags;
 313         msg.nm_m = m;
 314         msg.nm_addr = addr;
 315         msg.nm_control = control;
 316         msg.nm_td = td;
 317         error = lwkt_domsg(port, &msg.nm_netmsg.nm_lmsg, 0);
 318         return (error);
 319 }
 320
 321 /*
 322  * MPSAFE
 323  */
 324 int
 325 so_pru_sense(struct socket *so, struct stat *sb)
 326 {
 327         int error;
 328         struct netmsg_pru_sense msg;
 329
 330         netmsg_init(&msg.nm_netmsg, so, &curthread->td_msgport,
 331                     0, netmsg_pru_sense);
 332         msg.nm_prufn = so->so_proto->pr_usrreqs->pru_sense;
 333         msg.nm_stat = sb;
 334         error = lwkt_domsg(so->so_port, &msg.nm_netmsg.nm_lmsg, 0);
 335         return (error);
 336 }
 337
 338 int
 339 so_pru_shutdown(struct socket *so)
 340 {
 341         int error;
 342         struct netmsg_pru_shutdown msg;
 343
 344         netmsg_init(&msg.nm_netmsg, so, &curthread->td_msgport,
 345                     0, netmsg_pru_shutdown);
 346         msg.nm_prufn = so->so_proto->pr_usrreqs->pru_shutdown;
 347         error = lwkt_domsg(so->so_port, &msg.nm_netmsg.nm_lmsg, 0);
 348         return (error);
 349 }
 350
 351 int
 352 so_pru_sockaddr(struct socket *so, struct sockaddr **nam)
 353 {
 354         int error;
 355         struct netmsg_pru_sockaddr msg;
 356
 357         netmsg_init(&msg.nm_netmsg, so, &curthread->td_msgport,
 358                     0, netmsg_pru_sockaddr);
 359         msg.nm_prufn = so->so_proto->pr_usrreqs->pru_sockaddr;
 360         msg.nm_nam = nam;
 361         error = lwkt_domsg(so->so_port, &msg.nm_netmsg.nm_lmsg, 0);
 362         return (error);
 363 }
 364
 365 int
 366 so_pru_sopoll(struct socket *so, int events, struct ucred *cred)
 367 {
 368         int error;
 369         struct netmsg_pru_sopoll msg;
 370
 371         netmsg_init(&msg.nm_netmsg, so, &curthread->td_msgport,
 372                     0, netmsg_pru_sopoll);
 373         msg.nm_prufn = so->so_proto->pr_usrreqs->pru_sopoll;
 374         msg.nm_events = events;
 375         msg.nm_cred = cred;
 376         msg.nm_td = curthread;
 377         error = lwkt_domsg(so->so_port, &msg.nm_netmsg.nm_lmsg, 0);
 378         return (error);
 379 }
 380
 381 int
 382 so_pru_ctloutput(struct socket *so, struct sockopt *sopt)
 383 {
 384         struct netmsg_pru_ctloutput msg;
 385         int error;
 386
 387         KKASSERT(!sopt->sopt_val || kva_p(sopt->sopt_val));
 388         netmsg_init(&msg.nm_netmsg, so, &curthread->td_msgport,
 389                     0, netmsg_pru_ctloutput);
 390         /* TBD: move pr_ctloutput to pr_usrreqs */
 391         msg.nm_prufn = so->so_proto->pr_ctloutput;
 392         msg.nm_sopt = sopt;
 393         error = lwkt_domsg(so->so_port, &msg.nm_netmsg.nm_lmsg, 0);
 394         return (error);
 395 }
 396
 397 /*
 398  * Protocol control input, typically via icmp.
 399  *
 400  * If the protocol pr_ctlport is not NULL we call it to figure out the
 401  * protocol port.  If NULL is returned we can just return, otherwise
 402  * we issue a netmsg to call pr_ctlinput in the proper thread.
 403  *
 404  * This must be done synchronously as arg and/or extra may point to
 405  * temporary data.
 406  */
 407 void
 408 so_pru_ctlinput(struct protosw *pr, int cmd, struct sockaddr *arg, void *extra)
 409 {
 410         struct netmsg_pru_ctlinput msg;
 411         lwkt_port_t port;
 412
 413         if (pr->pr_ctlport == NULL)
 414                 return;
 415         KKASSERT(pr->pr_ctlinput != NULL);
 416         port = pr->pr_ctlport(cmd, arg, extra);
 417         if (port == NULL)
 418                 return;
 419         netmsg_init(&msg.nm_netmsg, NULL, &curthread->td_msgport,
 420                     0, netmsg_pru_ctlinput);
 421         msg.nm_prufn = pr->pr_ctlinput;
 422         msg.nm_cmd = cmd;
 423         msg.nm_arg = arg;
 424         msg.nm_extra = extra;
 425         lwkt_domsg(port, &msg.nm_netmsg.nm_lmsg, 0);
 426 }
 427
 428 /*
 429  * If we convert all the protosw pr_ functions for all the protocols
 430  * to take a message directly, this layer can go away.  For the moment
 431  * our dispatcher ignores the return value, but since we are handling
 432  * the replymsg ourselves we return EASYNC by convention.
 433  */
 434
 435 /*
 436  * Abort and destroy a socket.
 437  */
 438 void
 439 netmsg_pru_abort(netmsg_t msg)
 440 {
 441         struct netmsg_pru_abort *nm = (void *)msg;
 442         struct socket *so = msg->nm_so;
 443         int error;
 444
 445         KKASSERT(so->so_state & SS_ABORTING);
 446         so->so_state &= ~SS_ABORTING;
 447         error = nm->nm_prufn(so);
 448         if (error)
 449                 sofree(so);
 450         lwkt_replymsg(&msg->nm_lmsg, error);
 451 }
 452
 453 #ifdef notused
 454 void
 455 netmsg_pru_accept(netmsg_t msg)
 456 {
 457         struct netmsg_pru_accept *nm = (void *)msg;
 458
 459         lwkt_replymsg(&msg->nm_lmsg, nm->nm_prufn(msg->nm_so, nm->nm_nam));
 460 }
 461 #endif
 462
 463 void
 464 netmsg_pru_attach(netmsg_t msg)
 465 {
 466         struct netmsg_pru_attach *nm = (void *)msg;
 467
 468         lwkt_replymsg(&msg->nm_lmsg,
 469                       nm->nm_prufn(msg->nm_so, nm->nm_proto, nm->nm_ai));
 470 }
 471
 472 void
 473 netmsg_pru_bind(netmsg_t msg)
 474 {
 475         struct netmsg_pru_bind *nm = (void *)msg;
 476
 477         lwkt_replymsg(&msg->nm_lmsg,
 478                       nm->nm_prufn(msg->nm_so, nm->nm_nam, nm->nm_td));
 479 }
 480
 481 void
 482 netmsg_pru_connect(netmsg_t msg)
 483 {
 484         struct netmsg_pru_connect *nm = (void *)msg;
 485
 486         lwkt_replymsg(&msg->nm_lmsg,
 487                       nm->nm_prufn(msg->nm_so, nm->nm_nam, nm->nm_td));
 488 }
 489
 490 void
 491 netmsg_pru_connect2(netmsg_t msg)
 492 {
 493         struct netmsg_pru_connect2 *nm = (void *)msg;
 494
 495         lwkt_replymsg(&msg->nm_lmsg, nm->nm_prufn(nm->nm_so1, nm->nm_so2));
 496 }
 497
 498 void
 499 netmsg_pru_control(netmsg_t msg)
 500 {
 501         struct netmsg_pru_control *nm = (void *)msg;
 502         int error;
 503
 504         error = nm->nm_prufn(msg->nm_so, nm->nm_cmd, nm->nm_data,
 505                                 nm->nm_ifp, nm->nm_td);
 506         lwkt_replymsg(&msg->nm_lmsg, error);
 507 }
 508
 509 void
 510 netmsg_pru_detach(netmsg_t msg)
 511 {
 512         struct netmsg_pru_detach *nm = (void *)msg;
 513
 514         lwkt_replymsg(&msg->nm_lmsg, nm->nm_prufn(msg->nm_so));
 515 }
 516
 517 void
 518 netmsg_pru_disconnect(netmsg_t msg)
 519 {
 520         struct netmsg_pru_disconnect *nm = (void *)msg;
 521
 522         lwkt_replymsg(&msg->nm_lmsg, nm->nm_prufn(msg->nm_so));
 523 }
 524
 525 void
 526 netmsg_pru_listen(netmsg_t msg)
 527 {
 528         struct netmsg_pru_listen *nm = (void *)msg;
 529
 530         lwkt_replymsg(&msg->nm_lmsg, nm->nm_prufn(msg->nm_so, nm->nm_td));
 531 }
 532
 533 void
 534 netmsg_pru_peeraddr(netmsg_t msg)
 535 {
 536         struct netmsg_pru_peeraddr *nm = (void *)msg;
 537
 538         lwkt_replymsg(&msg->nm_lmsg, nm->nm_prufn(msg->nm_so, nm->nm_nam));
 539 }
 540
 541 void
 542 netmsg_pru_rcvd(netmsg_t msg)
 543 {
 544         struct netmsg_pru_rcvd *nm = (void *)msg;
 545
 546         lwkt_replymsg(&msg->nm_lmsg, nm->nm_prufn(msg->nm_so, nm->nm_flags));
 547 }
 548
 549 void
 550 netmsg_pru_rcvoob(netmsg_t msg)
 551 {
 552         struct netmsg_pru_rcvoob *nm = (void *)msg;
 553
 554         lwkt_replymsg(&msg->nm_lmsg,
 555                       nm->nm_prufn(msg->nm_so, nm->nm_m, nm->nm_flags));
 556 }
 557
 558 void
 559 netmsg_pru_send(netmsg_t msg)
 560 {
 561         struct netmsg_pru_send *nm = (void *)msg;
 562         int error;
 563
 564         error = nm->nm_prufn(msg->nm_so, nm->nm_flags, nm->nm_m,
 565                                 nm->nm_addr, nm->nm_control, nm->nm_td);
 566         lwkt_replymsg(&msg->nm_lmsg, error);
 567 }
 568
 569 void
 570 netmsg_pru_sense(netmsg_t msg)
 571 {
 572         struct netmsg_pru_sense *nm = (void *)msg;
 573
 574         lwkt_replymsg(&msg->nm_lmsg, nm->nm_prufn(msg->nm_so, nm->nm_stat));
 575 }
 576
 577 void
 578 netmsg_pru_shutdown(netmsg_t msg)
 579 {
 580         struct netmsg_pru_shutdown *nm = (void *)msg;
 581
 582         lwkt_replymsg(&msg->nm_lmsg, nm->nm_prufn(msg->nm_so));
 583 }
 584
 585 void
 586 netmsg_pru_sockaddr(netmsg_t msg)
 587 {
 588         struct netmsg_pru_sockaddr *nm = (void *)msg;
 589
 590         lwkt_replymsg(&msg->nm_lmsg, nm->nm_prufn(msg->nm_so, nm->nm_nam));
 591 }
 592
 593 void
 594 netmsg_pru_sopoll(netmsg_t msg)
 595 {
 596         struct netmsg_pru_sopoll *nm = (void *)msg;
 597         int error;
 598
 599         error = nm->nm_prufn(msg->nm_so, nm->nm_events, nm->nm_cred, nm->nm_td);
 600         lwkt_replymsg(&msg->nm_lmsg, error);
 601 }
 602
 603 void
 604 netmsg_pru_ctloutput(netmsg_t msg)
 605 {
 606         struct netmsg_pru_ctloutput *nm = (void *)msg;
 607
 608         lwkt_replymsg(&msg->nm_lmsg, nm->nm_prufn(msg->nm_so, nm->nm_sopt));
 609 }
 610
 611 void
 612 netmsg_pru_ctlinput(netmsg_t msg)
 613 {
 614         struct netmsg_pru_ctlinput *nm = (void *)msg;
 615
 616         nm->nm_prufn(nm->nm_cmd, nm->nm_arg, nm->nm_extra);
 617         lwkt_replymsg(&nm->nm_netmsg.nm_lmsg, 0);
 618 }
 619
 620 void
 621 netmsg_pr_timeout(netmsg_t msg)
 622 {
 623         struct netmsg_pr_timeout *nm = (void *)msg;
 624
 625         lwkt_replymsg(&msg->nm_lmsg, nm->nm_prfn());
 626 }
 627
 628 /*
 629  * Handle a predicate event request.  This function is only called once
 630  * when the predicate message queueing request is received.
 631  */
 632 void
 633 netmsg_so_notify(netmsg_t netmsg)
 634 {
 635         struct netmsg_so_notify *msg = (void *)netmsg;
 636         struct signalsockbuf *ssb;
 637
 638         ssb = (msg->nm_etype & NM_REVENT) ?
 639                         &msg->nm_so->so_rcv :
 640                         &msg->nm_so->so_snd;
 641
 642         /*
 643          * Reply immediately if the event has occured, otherwise queue the
 644          * request.
 645          */
 646         if (msg->nm_predicate(&msg->nm_netmsg)) {
 647                 lwkt_replymsg(&msg->nm_netmsg.nm_lmsg,
 648                               msg->nm_netmsg.nm_lmsg.ms_error);
 649         } else {
 650                 TAILQ_INSERT_TAIL(&ssb->ssb_sel.si_mlist, msg, nm_list);
 651                 ssb->ssb_flags |= SSB_MEVENT;
 652         }
 653 }
 654
 655 /*
 656  * Called by doio when trying to abort a netmsg_so_notify message.
 657  * Unlike the other functions this one is dispatched directly by
 658  * the LWKT subsystem, so it takes a lwkt_msg_t as an argument.
 659  *
 660  * The original message, lmsg, is under the control of the caller and
 661  * will not be destroyed until we return so we can safely reference it
 662  * in our synchronous abort request.
 663  *
 664  * This part of the abort request occurs on the originating cpu which
 665  * means we may race the message flags and the original message may
 666  * not even have been processed by the target cpu yet.
 667  */
 668 void
 669 netmsg_so_notify_doabort(lwkt_msg_t lmsg)
 670 {
 671         struct netmsg_so_notify_abort msg;
 672
 673         if ((lmsg->ms_flags & (MSGF_DONE | MSGF_REPLY)) == 0) {
 674                 netmsg_init(&msg.nm_netmsg, NULL, &curthread->td_msgport,
 675                             0, netmsg_so_notify_abort);
 676                 msg.nm_notifymsg = (void *)lmsg;
 677                 lwkt_domsg(lmsg->ms_target_port, &msg.nm_netmsg.nm_lmsg, 0);
 678         }
 679 }
 680
 681 /*
 682  * Predicate requests can be aborted.  This function is only called once
 683  * and will interlock against processing/reply races (since such races
 684  * occur on the same thread that controls the port where the abort is
 685  * requeued).
 686  *
 687  * This part of the abort request occurs on the target cpu.  The message
 688  * flags must be tested again in case the test that we did on the
 689  * originating cpu raced.  Since messages are handled in sequence, the
 690  * original message will have already been handled by the loop and either
 691  * replied to or queued.
 692  *
 693  * We really only need to interlock with MSGF_REPLY (a bit that is set on
 694  * our cpu when we reply).  Note that MSGF_DONE is not set until the
 695  * reply reaches the originating cpu.  Test both bits anyway.
 696  */
 697 void
 698 netmsg_so_notify_abort(netmsg_t netmsg)
 699 {
 700         struct netmsg_so_notify_abort *abrtmsg = (void *)netmsg;
 701         struct netmsg_so_notify *msg = abrtmsg->nm_notifymsg;
 702         struct signalsockbuf *ssb;
 703
 704         /*
 705          * The original notify message is not destroyed until after the
 706          * abort request is returned, so we can check its state.
 707          */
 708         if ((msg->nm_netmsg.nm_lmsg.ms_flags & (MSGF_DONE | MSGF_REPLY)) == 0) {
 709                 ssb = (msg->nm_etype & NM_REVENT) ?
 710                                 &msg->nm_so->so_rcv :
 711                                 &msg->nm_so->so_snd;
 712                 TAILQ_REMOVE(&ssb->ssb_sel.si_mlist, msg, nm_list);
 713                 lwkt_replymsg(&msg->nm_netmsg.nm_lmsg, EINTR);
 714         }
 715
 716         /*
 717          * Reply to the abort message
 718          */
 719         lwkt_replymsg(&abrtmsg->nm_netmsg.nm_lmsg, 0);
 720 }
 721