2 * Copyright (c) 2003, 2004 Jeffrey M. Hsu. All rights reserved.
3 * Copyright (c) 2003, 2004 The DragonFly Project. All rights reserved.
5 * This code is derived from software contributed to The DragonFly Project
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
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.
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
33 * $DragonFly: src/sys/kern/uipc_msg.c,v 1.20 2007/12/19 11:00:22 sephe Exp $
36 #include <sys/param.h>
37 #include <sys/systm.h>
38 #include <sys/msgport.h>
39 #include <sys/protosw.h>
40 #include <sys/socket.h>
41 #include <sys/socketvar.h>
42 #include <sys/socketops.h>
43 #include <sys/thread.h>
44 #include <sys/thread2.h>
45 #include <sys/msgport2.h>
46 #include <net/netmsg2.h>
48 #include <net/netisr.h>
49 #include <net/netmsg.h>
52 so_pru_abort(struct socket *so)
55 struct netmsg_pru_abort msg;
58 port = so->so_proto->pr_mport(so, NULL, NULL, PRU_ABORT);
59 netmsg_init(&msg.nm_netmsg, &curthread->td_msgport, 0,
61 msg.nm_prufn = so->so_proto->pr_usrreqs->pru_abort;
63 error = lwkt_domsg(port, &msg.nm_netmsg.nm_lmsg, 0);
68 so_pru_accept(struct socket *so, struct sockaddr **nam)
70 /* Block (memory allocation) in process context. XXX JH */
71 return ((*so->so_proto->pr_usrreqs->pru_accept)(so, nam));
75 struct netmsg_pru_accept msg;
78 port = so->so_proto->pr_mport(so, NULL, NULL, PRU_ACCEPT);
79 netmsg_init(&msg.nm_netmsg, &curthread->td_msgport, 0,
81 msg.nm_prufn = so->so_proto->pr_usrreqs->pru_accept;
84 error = lwkt_domsg(port, &msg.nm_netmsg.nm_lmsg, 0);
90 so_pru_attach(struct socket *so, int proto, struct pru_attach_info *ai)
93 struct netmsg_pru_attach msg;
96 port = so->so_proto->pr_mport(NULL, NULL, NULL, PRU_ATTACH);
97 netmsg_init(&msg.nm_netmsg, &curthread->td_msgport, 0,
99 msg.nm_prufn = so->so_proto->pr_usrreqs->pru_attach;
101 msg.nm_proto = proto;
103 error = lwkt_domsg(port, &msg.nm_netmsg.nm_lmsg, 0);
108 so_pru_bind(struct socket *so, struct sockaddr *nam, struct thread *td)
111 struct netmsg_pru_bind msg;
114 /* Send mesg to thread for new address. */
115 port = so->so_proto->pr_mport(NULL, nam, NULL, PRU_BIND);
116 netmsg_init(&msg.nm_netmsg, &curthread->td_msgport, 0,
118 msg.nm_prufn = so->so_proto->pr_usrreqs->pru_bind;
121 msg.nm_td = td; /* used only for prison_ip() XXX JH */
122 error = lwkt_domsg(port, &msg.nm_netmsg.nm_lmsg, 0);
127 so_pru_connect(struct socket *so, struct sockaddr *nam, struct thread *td)
130 struct netmsg_pru_connect msg;
133 port = so->so_proto->pr_mport(so, nam, NULL, PRU_CONNECT);
134 netmsg_init(&msg.nm_netmsg, &curthread->td_msgport, 0,
136 msg.nm_prufn = so->so_proto->pr_usrreqs->pru_connect;
140 error = lwkt_domsg(port, &msg.nm_netmsg.nm_lmsg, 0);
145 so_pru_connect2(struct socket *so1, struct socket *so2)
148 struct netmsg_pru_connect2 msg;
151 port = so1->so_proto->pr_mport(so1, NULL, NULL, PRU_CONNECT2);
152 netmsg_init(&msg.nm_netmsg, &curthread->td_msgport, 0,
153 netmsg_pru_connect2);
154 msg.nm_prufn = so1->so_proto->pr_usrreqs->pru_connect2;
157 error = lwkt_domsg(port, &msg.nm_netmsg.nm_lmsg, 0);
162 so_pru_control(struct socket *so, u_long cmd, caddr_t data, struct ifnet *ifp)
164 return ((*so->so_proto->pr_usrreqs->pru_control)(so, cmd, data, ifp,
166 #ifdef gag /* does copyin and copyout deep inside stack XXX JH */
168 struct netmsg_pru_control msg;
171 port = so->so_proto->pr_mport(so, NULL, NULL, PRU_CONTROL);
172 netmsg_init(&msg.nm_netmsg, &curthread->td_msgport, 0,
174 msg.nm_prufn = so->so_proto->pr_usrreqs->pru_control;
180 error = lwkt_domsg(port, &msg.nm_netmsg.nm_lmsg, 0);
186 so_pru_detach(struct socket *so)
189 struct netmsg_pru_detach msg;
192 port = so->so_proto->pr_mport(so, NULL, NULL, PRU_DETACH);
193 netmsg_init(&msg.nm_netmsg, &curthread->td_msgport, 0,
195 msg.nm_prufn = so->so_proto->pr_usrreqs->pru_detach;
197 error = lwkt_domsg(port, &msg.nm_netmsg.nm_lmsg, 0);
202 so_pru_disconnect(struct socket *so)
205 struct netmsg_pru_disconnect msg;
208 port = so->so_proto->pr_mport(so, NULL, NULL, PRU_DISCONNECT);
209 netmsg_init(&msg.nm_netmsg, &curthread->td_msgport, 0,
210 netmsg_pru_disconnect);
211 msg.nm_prufn = so->so_proto->pr_usrreqs->pru_disconnect;
213 error = lwkt_domsg(port, &msg.nm_netmsg.nm_lmsg, 0);
218 so_pru_listen(struct socket *so, struct thread *td)
221 struct netmsg_pru_listen msg;
224 port = so->so_proto->pr_mport(so, NULL, NULL, PRU_LISTEN);
225 netmsg_init(&msg.nm_netmsg, &curthread->td_msgport, 0,
227 msg.nm_prufn = so->so_proto->pr_usrreqs->pru_listen;
229 msg.nm_td = td; /* used only for prison_ip() XXX JH */
230 error = lwkt_domsg(port, &msg.nm_netmsg.nm_lmsg, 0);
235 so_pru_peeraddr(struct socket *so, struct sockaddr **nam)
238 struct netmsg_pru_peeraddr msg;
241 port = so->so_proto->pr_mport(so, NULL, NULL, PRU_PEERADDR);
242 netmsg_init(&msg.nm_netmsg, &curthread->td_msgport, 0,
243 netmsg_pru_peeraddr);
244 msg.nm_prufn = so->so_proto->pr_usrreqs->pru_peeraddr;
247 error = lwkt_domsg(port, &msg.nm_netmsg.nm_lmsg, 0);
252 so_pru_rcvd(struct socket *so, int flags)
255 struct netmsg_pru_rcvd msg;
258 port = so->so_proto->pr_mport(so, NULL, NULL, PRU_RCVD);
259 netmsg_init(&msg.nm_netmsg, &curthread->td_msgport, 0,
261 msg.nm_prufn = so->so_proto->pr_usrreqs->pru_rcvd;
263 msg.nm_flags = flags;
264 error = lwkt_domsg(port, &msg.nm_netmsg.nm_lmsg, 0);
269 so_pru_rcvoob(struct socket *so, struct mbuf *m, int flags)
272 struct netmsg_pru_rcvoob msg;
275 port = so->so_proto->pr_mport(so, NULL, NULL, PRU_RCVOOB);
276 netmsg_init(&msg.nm_netmsg, &curthread->td_msgport, 0,
278 msg.nm_prufn = so->so_proto->pr_usrreqs->pru_rcvoob;
281 msg.nm_flags = flags;
282 error = lwkt_domsg(port, &msg.nm_netmsg.nm_lmsg, 0);
287 so_pru_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr,
288 struct mbuf *control, struct thread *td)
291 struct netmsg_pru_send msg;
294 port = so->so_proto->pr_mport(so, addr, &m, PRU_SEND);
300 netmsg_init(&msg.nm_netmsg, &curthread->td_msgport, 0,
302 msg.nm_prufn = so->so_proto->pr_usrreqs->pru_send;
304 msg.nm_flags = flags;
307 msg.nm_control = control;
309 error = lwkt_domsg(port, &msg.nm_netmsg.nm_lmsg, 0);
314 so_pru_sense(struct socket *so, struct stat *sb)
317 struct netmsg_pru_sense msg;
320 port = so->so_proto->pr_mport(so, NULL, NULL, PRU_SENSE);
321 netmsg_init(&msg.nm_netmsg, &curthread->td_msgport, 0,
323 msg.nm_prufn = so->so_proto->pr_usrreqs->pru_sense;
326 error = lwkt_domsg(port, &msg.nm_netmsg.nm_lmsg, 0);
331 so_pru_shutdown(struct socket *so)
334 struct netmsg_pru_shutdown msg;
337 port = so->so_proto->pr_mport(so, NULL, NULL, PRU_SHUTDOWN);
338 netmsg_init(&msg.nm_netmsg, &curthread->td_msgport, 0,
339 netmsg_pru_shutdown);
340 msg.nm_prufn = so->so_proto->pr_usrreqs->pru_shutdown;
342 error = lwkt_domsg(port, &msg.nm_netmsg.nm_lmsg, 0);
347 so_pru_sockaddr(struct socket *so, struct sockaddr **nam)
350 struct netmsg_pru_sockaddr msg;
353 port = so->so_proto->pr_mport(so, NULL, NULL, PRU_SOCKADDR);
354 netmsg_init(&msg.nm_netmsg, &curthread->td_msgport, 0,
355 netmsg_pru_sockaddr);
356 msg.nm_prufn = so->so_proto->pr_usrreqs->pru_sockaddr;
359 error = lwkt_domsg(port, &msg.nm_netmsg.nm_lmsg, 0);
364 so_pru_sopoll(struct socket *so, int events, struct ucred *cred)
367 struct netmsg_pru_sopoll msg;
370 port = so->so_proto->pr_mport(so, NULL, NULL, PRU_SOPOLL);
371 netmsg_init(&msg.nm_netmsg, &curthread->td_msgport, 0,
373 msg.nm_prufn = so->so_proto->pr_usrreqs->pru_sopoll;
375 msg.nm_events = events;
377 msg.nm_td = curthread;
378 error = lwkt_domsg(port, &msg.nm_netmsg.nm_lmsg, 0);
383 so_pr_ctloutput(struct socket *so, struct sockopt *sopt)
385 return ((*so->so_proto->pr_ctloutput)(so, sopt));
386 #ifdef gag /* does copyin and copyout deep inside stack XXX JH */
387 struct netmsg_pr_ctloutput msg;
391 port = so->so_proto->pr_mport(so, NULL);
392 netmsg_init(&msg.nm_netmsg, &curthread->td_msgport, 0,
393 netmsg_pru_ctloutput);
394 msg.nm_prfn = so->so_proto->pr_ctloutput;
397 error = lwkt_domsg(port, &msg.nm_netmsg.nm_lmsg, 0);
403 * If we convert all the protosw pr_ functions for all the protocols
404 * to take a message directly, this layer can go away. For the moment
405 * our dispatcher ignores the return value, but since we are handling
406 * the replymsg ourselves we return EASYNC by convention.
409 netmsg_pru_abort(netmsg_t msg)
411 struct netmsg_pru_abort *nm = (void *)msg;
413 lwkt_replymsg(&msg->nm_lmsg, nm->nm_prufn(nm->nm_so));
418 netmsg_pru_accept(netmsg_t msg)
420 struct netmsg_pru_accept *nm = (void *)msg;
422 lwkt_replymsg(&msg->nm_lmsg, nm->nm_prufn(nm->nm_so, nm->nm_nam));
427 netmsg_pru_attach(netmsg_t msg)
429 struct netmsg_pru_attach *nm = (void *)msg;
431 lwkt_replymsg(&msg->nm_lmsg,
432 nm->nm_prufn(nm->nm_so, nm->nm_proto, nm->nm_ai));
436 netmsg_pru_bind(netmsg_t msg)
438 struct netmsg_pru_bind *nm = (void *)msg;
440 lwkt_replymsg(&msg->nm_lmsg,
441 nm->nm_prufn(nm->nm_so, nm->nm_nam, nm->nm_td));
445 netmsg_pru_connect(netmsg_t msg)
447 struct netmsg_pru_connect *nm = (void *)msg;
449 lwkt_replymsg(&msg->nm_lmsg,
450 nm->nm_prufn(nm->nm_so, nm->nm_nam, nm->nm_td));
454 netmsg_pru_connect2(netmsg_t msg)
456 struct netmsg_pru_connect2 *nm = (void *)msg;
458 lwkt_replymsg(&msg->nm_lmsg, nm->nm_prufn(nm->nm_so1, nm->nm_so2));
462 netmsg_pru_control(netmsg_t msg)
464 struct netmsg_pru_control *nm = (void *)msg;
467 error = nm->nm_prufn(nm->nm_so, nm->nm_cmd, nm->nm_data,
468 nm->nm_ifp, nm->nm_td);
469 lwkt_replymsg(&msg->nm_lmsg, error);
473 netmsg_pru_detach(netmsg_t msg)
475 struct netmsg_pru_detach *nm = (void *)msg;
477 lwkt_replymsg(&msg->nm_lmsg, nm->nm_prufn(nm->nm_so));
481 netmsg_pru_disconnect(netmsg_t msg)
483 struct netmsg_pru_disconnect *nm = (void *)msg;
485 lwkt_replymsg(&msg->nm_lmsg, nm->nm_prufn(nm->nm_so));
489 netmsg_pru_listen(netmsg_t msg)
491 struct netmsg_pru_listen *nm = (void *)msg;
493 lwkt_replymsg(&msg->nm_lmsg, nm->nm_prufn(nm->nm_so, nm->nm_td));
497 netmsg_pru_peeraddr(netmsg_t msg)
499 struct netmsg_pru_peeraddr *nm = (void *)msg;
501 lwkt_replymsg(&msg->nm_lmsg, nm->nm_prufn(nm->nm_so, nm->nm_nam));
505 netmsg_pru_rcvd(netmsg_t msg)
507 struct netmsg_pru_rcvd *nm = (void *)msg;
509 lwkt_replymsg(&msg->nm_lmsg, nm->nm_prufn(nm->nm_so, nm->nm_flags));
513 netmsg_pru_rcvoob(netmsg_t msg)
515 struct netmsg_pru_rcvoob *nm = (void *)msg;
517 lwkt_replymsg(&msg->nm_lmsg,
518 nm->nm_prufn(nm->nm_so, nm->nm_m, nm->nm_flags));
522 netmsg_pru_send(netmsg_t msg)
524 struct netmsg_pru_send *nm = (void *)msg;
527 error = nm->nm_prufn(nm->nm_so, nm->nm_flags, nm->nm_m,
528 nm->nm_addr, nm->nm_control, nm->nm_td);
529 lwkt_replymsg(&msg->nm_lmsg, error);
533 netmsg_pru_sense(netmsg_t msg)
535 struct netmsg_pru_sense *nm = (void *)msg;
537 lwkt_replymsg(&msg->nm_lmsg, nm->nm_prufn(nm->nm_so, nm->nm_stat));
541 netmsg_pru_shutdown(netmsg_t msg)
543 struct netmsg_pru_shutdown *nm = (void *)msg;
545 lwkt_replymsg(&msg->nm_lmsg, nm->nm_prufn(nm->nm_so));
549 netmsg_pru_sockaddr(netmsg_t msg)
551 struct netmsg_pru_sockaddr *nm = (void *)msg;
553 lwkt_replymsg(&msg->nm_lmsg, nm->nm_prufn(nm->nm_so, nm->nm_nam));
557 netmsg_pru_sopoll(netmsg_t msg)
559 struct netmsg_pru_sopoll *nm = (void *)msg;
562 error = nm->nm_prufn(nm->nm_so, nm->nm_events, nm->nm_cred, nm->nm_td);
563 lwkt_replymsg(&msg->nm_lmsg, error);
567 netmsg_pr_ctloutput(netmsg_t msg)
569 struct netmsg_pr_ctloutput *nm = (void *)msg;
571 lwkt_replymsg(&msg->nm_lmsg, nm->nm_prfn(nm->nm_so, nm->nm_sopt));
575 netmsg_pr_timeout(netmsg_t msg)
577 struct netmsg_pr_timeout *nm = (void *)msg;
579 lwkt_replymsg(&msg->nm_lmsg, nm->nm_prfn());
583 * Handle a predicate event request. This function is only called once
584 * when the predicate message queueing request is received.
587 netmsg_so_notify(netmsg_t netmsg)
589 struct netmsg_so_notify *msg = (void *)netmsg;
590 struct signalsockbuf *ssb;
592 ssb = (msg->nm_etype & NM_REVENT) ?
593 &msg->nm_so->so_rcv :
597 * Reply immediately if the event has occured, otherwise queue the
600 if (msg->nm_predicate(&msg->nm_netmsg)) {
601 lwkt_replymsg(&msg->nm_netmsg.nm_lmsg,
602 msg->nm_netmsg.nm_lmsg.ms_error);
604 TAILQ_INSERT_TAIL(&ssb->ssb_sel.si_mlist, msg, nm_list);
605 ssb->ssb_flags |= SSB_MEVENT;
610 * Called by doio when trying to abort a netmsg_so_notify message.
611 * Unlike the other functions this one is dispatched directly by
612 * the LWKT subsystem, so it takes a lwkt_msg_t as an argument.
614 * The original message, lmsg, is under the control of the caller and
615 * will not be destroyed until we return so we can safely reference it
616 * in our synchronous abort request.
618 * This part of the abort request occurs on the originating cpu which
619 * means we may race the message flags and the original message may
620 * not even have been processed by the target cpu yet.
623 netmsg_so_notify_doabort(lwkt_msg_t lmsg)
625 struct netmsg_so_notify_abort msg;
627 if ((lmsg->ms_flags & (MSGF_DONE | MSGF_REPLY)) == 0) {
628 netmsg_init(&msg.nm_netmsg, &curthread->td_msgport, 0,
629 netmsg_so_notify_abort);
630 msg.nm_notifymsg = (void *)lmsg;
631 lwkt_domsg(lmsg->ms_target_port, &msg.nm_netmsg.nm_lmsg, 0);
636 * Predicate requests can be aborted. This function is only called once
637 * and will interlock against processing/reply races (since such races
638 * occur on the same thread that controls the port where the abort is
641 * This part of the abort request occurs on the target cpu. The message
642 * flags must be tested again in case the test that we did on the
643 * originating cpu raced. Since messages are handled in sequence, the
644 * original message will have already been handled by the loop and either
645 * replied to or queued.
647 * We really only need to interlock with MSGF_REPLY (a bit that is set on
648 * our cpu when we reply). Note that MSGF_DONE is not set until the
649 * reply reaches the originating cpu. Test both bits anyway.
652 netmsg_so_notify_abort(netmsg_t netmsg)
654 struct netmsg_so_notify_abort *abrtmsg = (void *)netmsg;
655 struct netmsg_so_notify *msg = abrtmsg->nm_notifymsg;
656 struct signalsockbuf *ssb;
659 * The original notify message is not destroyed until after the
660 * abort request is returned, so we can check its state.
662 if ((msg->nm_netmsg.nm_lmsg.ms_flags & (MSGF_DONE | MSGF_REPLY)) == 0) {
663 ssb = (msg->nm_etype & NM_REVENT) ?
664 &msg->nm_so->so_rcv :
666 TAILQ_REMOVE(&ssb->ssb_sel.si_mlist, msg, nm_list);
667 lwkt_replymsg(&msg->nm_netmsg.nm_lmsg, EINTR);
671 * Reply to the abort message
673 lwkt_replymsg(&abrtmsg->nm_netmsg.nm_lmsg, 0);