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 1.26 2008/10/27 02:56:30 sephe Exp $
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>
48 #include <net/netmsg2.h>
50 #include <net/netisr.h>
51 #include <net/netmsg.h>
54 * Abort a socket and free it. Called from soabort() only.
56 * The SS_ABORTING flag must already be set.
59 so_pru_abort(struct socket
*so
)
61 struct netmsg_pru_abort msg
;
64 KKASSERT(so
->so_state
& SS_ABORTING
);
65 port
= so
->so_proto
->pr_mport(so
, NULL
, NULL
, PRU_ABORT
);
66 netmsg_init(&msg
.nm_netmsg
, &curthread
->td_msgport
,
68 msg
.nm_prufn
= so
->so_proto
->pr_usrreqs
->pru_abort
;
70 (void)lwkt_domsg(port
, &msg
.nm_netmsg
.nm_lmsg
, 0);
74 * Abort a socket and free it, asynchronously. Called from
77 * The SS_ABORTING flag must already be set.
80 so_pru_aborta(struct socket
*so
)
82 struct netmsg_pru_abort
*msg
;
85 KKASSERT(so
->so_state
& SS_ABORTING
);
86 msg
= kmalloc(sizeof(*msg
), M_LWKTMSG
, M_WAITOK
| M_ZERO
);
87 port
= so
->so_proto
->pr_mport(so
, NULL
, NULL
, PRU_ABORT
);
88 netmsg_init(&msg
->nm_netmsg
, &netisr_afree_rport
,
90 msg
->nm_prufn
= so
->so_proto
->pr_usrreqs
->pru_abort
;
92 lwkt_sendmsg(port
, &msg
->nm_netmsg
.nm_lmsg
);
96 * Abort a socket and free it. Called from soabort_oncpu() only.
97 * Caller must make sure that the current CPU is inpcb's owner CPU.
99 * The SS_ABORTING flag must already be set.
102 so_pru_abort_oncpu(struct socket
*so
)
104 so
->so_proto
->pr_usrreqs
->pru_abort(so
);
108 so_pru_accept(struct socket
*so
, struct sockaddr
**nam
)
110 /* Block (memory allocation) in process context. XXX JH */
111 return ((*so
->so_proto
->pr_usrreqs
->pru_accept
)(so
, nam
));
115 struct netmsg_pru_accept msg
;
118 port
= so
->so_proto
->pr_mport(so
, NULL
, NULL
, PRU_ACCEPT
);
119 netmsg_init(&msg
.nm_netmsg
, &curthread
->td_msgport
, 0,
121 msg
.nm_prufn
= so
->so_proto
->pr_usrreqs
->pru_accept
;
124 error
= lwkt_domsg(port
, &msg
.nm_netmsg
.nm_lmsg
, 0);
130 so_pru_attach(struct socket
*so
, int proto
, struct pru_attach_info
*ai
)
133 struct netmsg_pru_attach msg
;
136 port
= so
->so_proto
->pr_mport(NULL
, NULL
, NULL
, PRU_ATTACH
);
137 netmsg_init(&msg
.nm_netmsg
, &curthread
->td_msgport
, 0,
139 msg
.nm_prufn
= so
->so_proto
->pr_usrreqs
->pru_attach
;
141 msg
.nm_proto
= proto
;
143 error
= lwkt_domsg(port
, &msg
.nm_netmsg
.nm_lmsg
, 0);
148 so_pru_bind(struct socket
*so
, struct sockaddr
*nam
, struct thread
*td
)
151 struct netmsg_pru_bind msg
;
154 /* Send mesg to thread for new address. */
155 port
= so
->so_proto
->pr_mport(NULL
, nam
, NULL
, PRU_BIND
);
156 netmsg_init(&msg
.nm_netmsg
, &curthread
->td_msgport
, 0,
158 msg
.nm_prufn
= so
->so_proto
->pr_usrreqs
->pru_bind
;
161 msg
.nm_td
= td
; /* used only for prison_ip() XXX JH */
162 error
= lwkt_domsg(port
, &msg
.nm_netmsg
.nm_lmsg
, 0);
167 so_pru_connect(struct socket
*so
, struct sockaddr
*nam
, struct thread
*td
)
170 struct netmsg_pru_connect msg
;
173 port
= so
->so_proto
->pr_mport(so
, nam
, NULL
, PRU_CONNECT
);
174 netmsg_init(&msg
.nm_netmsg
, &curthread
->td_msgport
, 0,
176 msg
.nm_prufn
= so
->so_proto
->pr_usrreqs
->pru_connect
;
180 error
= lwkt_domsg(port
, &msg
.nm_netmsg
.nm_lmsg
, 0);
185 so_pru_connect2(struct socket
*so1
, struct socket
*so2
)
188 struct netmsg_pru_connect2 msg
;
191 port
= so1
->so_proto
->pr_mport(so1
, NULL
, NULL
, PRU_CONNECT2
);
192 netmsg_init(&msg
.nm_netmsg
, &curthread
->td_msgport
, 0,
193 netmsg_pru_connect2
);
194 msg
.nm_prufn
= so1
->so_proto
->pr_usrreqs
->pru_connect2
;
197 error
= lwkt_domsg(port
, &msg
.nm_netmsg
.nm_lmsg
, 0);
202 so_pru_control(struct socket
*so
, u_long cmd
, caddr_t data
, struct ifnet
*ifp
)
204 return ((*so
->so_proto
->pr_usrreqs
->pru_control
)(so
, cmd
, data
, ifp
,
206 #ifdef gag /* does copyin and copyout deep inside stack XXX JH */
208 struct netmsg_pru_control msg
;
211 port
= so
->so_proto
->pr_mport(so
, NULL
, NULL
, PRU_CONTROL
);
212 netmsg_init(&msg
.nm_netmsg
, &curthread
->td_msgport
, 0,
214 msg
.nm_prufn
= so
->so_proto
->pr_usrreqs
->pru_control
;
220 error
= lwkt_domsg(port
, &msg
.nm_netmsg
.nm_lmsg
, 0);
226 so_pru_detach(struct socket
*so
)
229 struct netmsg_pru_detach msg
;
232 port
= so
->so_proto
->pr_mport(so
, NULL
, NULL
, PRU_DETACH
);
233 netmsg_init(&msg
.nm_netmsg
, &curthread
->td_msgport
, 0,
235 msg
.nm_prufn
= so
->so_proto
->pr_usrreqs
->pru_detach
;
237 error
= lwkt_domsg(port
, &msg
.nm_netmsg
.nm_lmsg
, 0);
242 so_pru_disconnect(struct socket
*so
)
245 struct netmsg_pru_disconnect msg
;
248 port
= so
->so_proto
->pr_mport(so
, NULL
, NULL
, PRU_DISCONNECT
);
249 netmsg_init(&msg
.nm_netmsg
, &curthread
->td_msgport
, 0,
250 netmsg_pru_disconnect
);
251 msg
.nm_prufn
= so
->so_proto
->pr_usrreqs
->pru_disconnect
;
253 error
= lwkt_domsg(port
, &msg
.nm_netmsg
.nm_lmsg
, 0);
258 so_pru_listen(struct socket
*so
, struct thread
*td
)
261 struct netmsg_pru_listen msg
;
264 port
= so
->so_proto
->pr_mport(so
, NULL
, NULL
, PRU_LISTEN
);
265 netmsg_init(&msg
.nm_netmsg
, &curthread
->td_msgport
, 0,
267 msg
.nm_prufn
= so
->so_proto
->pr_usrreqs
->pru_listen
;
269 msg
.nm_td
= td
; /* used only for prison_ip() XXX JH */
270 error
= lwkt_domsg(port
, &msg
.nm_netmsg
.nm_lmsg
, 0);
275 so_pru_peeraddr(struct socket
*so
, struct sockaddr
**nam
)
278 struct netmsg_pru_peeraddr msg
;
281 port
= so
->so_proto
->pr_mport(so
, NULL
, NULL
, PRU_PEERADDR
);
282 netmsg_init(&msg
.nm_netmsg
, &curthread
->td_msgport
, 0,
283 netmsg_pru_peeraddr
);
284 msg
.nm_prufn
= so
->so_proto
->pr_usrreqs
->pru_peeraddr
;
287 error
= lwkt_domsg(port
, &msg
.nm_netmsg
.nm_lmsg
, 0);
292 so_pru_rcvd(struct socket
*so
, int flags
)
295 struct netmsg_pru_rcvd msg
;
298 port
= so
->so_proto
->pr_mport(so
, NULL
, NULL
, PRU_RCVD
);
299 netmsg_init(&msg
.nm_netmsg
, &curthread
->td_msgport
, 0,
301 msg
.nm_prufn
= so
->so_proto
->pr_usrreqs
->pru_rcvd
;
303 msg
.nm_flags
= flags
;
304 error
= lwkt_domsg(port
, &msg
.nm_netmsg
.nm_lmsg
, 0);
309 so_pru_rcvoob(struct socket
*so
, struct mbuf
*m
, int flags
)
312 struct netmsg_pru_rcvoob msg
;
315 port
= so
->so_proto
->pr_mport(so
, NULL
, NULL
, PRU_RCVOOB
);
316 netmsg_init(&msg
.nm_netmsg
, &curthread
->td_msgport
, 0,
318 msg
.nm_prufn
= so
->so_proto
->pr_usrreqs
->pru_rcvoob
;
321 msg
.nm_flags
= flags
;
322 error
= lwkt_domsg(port
, &msg
.nm_netmsg
.nm_lmsg
, 0);
327 so_pru_send(struct socket
*so
, int flags
, struct mbuf
*m
, struct sockaddr
*addr
,
328 struct mbuf
*control
, struct thread
*td
)
331 struct netmsg_pru_send msg
;
334 port
= so
->so_proto
->pr_mport(so
, addr
, &m
, PRU_SEND
);
340 netmsg_init(&msg
.nm_netmsg
, &curthread
->td_msgport
, 0,
342 msg
.nm_prufn
= so
->so_proto
->pr_usrreqs
->pru_send
;
344 msg
.nm_flags
= flags
;
347 msg
.nm_control
= control
;
349 error
= lwkt_domsg(port
, &msg
.nm_netmsg
.nm_lmsg
, 0);
357 so_pru_sense(struct socket
*so
, struct stat
*sb
)
360 struct netmsg_pru_sense msg
;
363 port
= so
->so_proto
->pr_mport(so
, NULL
, NULL
, PRU_SENSE
);
364 netmsg_init(&msg
.nm_netmsg
, &curthread
->td_msgport
, 0,
366 msg
.nm_prufn
= so
->so_proto
->pr_usrreqs
->pru_sense
;
369 error
= lwkt_domsg(port
, &msg
.nm_netmsg
.nm_lmsg
, 0);
374 so_pru_shutdown(struct socket
*so
)
377 struct netmsg_pru_shutdown msg
;
380 port
= so
->so_proto
->pr_mport(so
, NULL
, NULL
, PRU_SHUTDOWN
);
381 netmsg_init(&msg
.nm_netmsg
, &curthread
->td_msgport
, 0,
382 netmsg_pru_shutdown
);
383 msg
.nm_prufn
= so
->so_proto
->pr_usrreqs
->pru_shutdown
;
385 error
= lwkt_domsg(port
, &msg
.nm_netmsg
.nm_lmsg
, 0);
390 so_pru_sockaddr(struct socket
*so
, struct sockaddr
**nam
)
393 struct netmsg_pru_sockaddr msg
;
396 port
= so
->so_proto
->pr_mport(so
, NULL
, NULL
, PRU_SOCKADDR
);
397 netmsg_init(&msg
.nm_netmsg
, &curthread
->td_msgport
, 0,
398 netmsg_pru_sockaddr
);
399 msg
.nm_prufn
= so
->so_proto
->pr_usrreqs
->pru_sockaddr
;
402 error
= lwkt_domsg(port
, &msg
.nm_netmsg
.nm_lmsg
, 0);
407 so_pru_sopoll(struct socket
*so
, int events
, struct ucred
*cred
)
410 struct netmsg_pru_sopoll msg
;
413 port
= so
->so_proto
->pr_mport(so
, NULL
, NULL
, PRU_SOPOLL
);
414 netmsg_init(&msg
.nm_netmsg
, &curthread
->td_msgport
, 0,
416 msg
.nm_prufn
= so
->so_proto
->pr_usrreqs
->pru_sopoll
;
418 msg
.nm_events
= events
;
420 msg
.nm_td
= curthread
;
421 error
= lwkt_domsg(port
, &msg
.nm_netmsg
.nm_lmsg
, 0);
426 so_pru_ctloutput(struct socket
*so
, struct sockopt
*sopt
)
428 struct netmsg_pru_ctloutput msg
;
432 KKASSERT(!sopt
->sopt_val
|| kva_p(sopt
->sopt_val
));
433 port
= so
->so_proto
->pr_mport(so
, NULL
, NULL
, PRU_CTLOUTPUT
);
434 netmsg_init(&msg
.nm_netmsg
, &curthread
->td_msgport
, 0,
435 netmsg_pru_ctloutput
);
436 /* TBD: move pr_ctloutput to pr_usrreqs */
437 msg
.nm_prufn
= so
->so_proto
->pr_ctloutput
;
440 error
= lwkt_domsg(port
, &msg
.nm_netmsg
.nm_lmsg
, 0);
445 * Protocol control input, typically via icmp.
447 * If the protocol pr_ctlport is not NULL we call it to figure out the
448 * protocol port. If NULL is returned we can just return, otherwise
449 * we issue a netmsg to call pr_ctlinput in the proper thread.
451 * This must be done synchronously as arg and/or extra may point to
455 so_pru_ctlinput(struct protosw
*pr
, int cmd
, struct sockaddr
*arg
, void *extra
)
457 struct netmsg_pru_ctlinput msg
;
460 if (pr
->pr_ctlport
== NULL
)
462 KKASSERT(pr
->pr_ctlinput
!= NULL
);
463 port
= pr
->pr_ctlport(cmd
, arg
, extra
);
466 netmsg_init(&msg
.nm_netmsg
, &curthread
->td_msgport
, 0,
467 netmsg_pru_ctlinput
);
468 msg
.nm_prufn
= pr
->pr_ctlinput
;
471 msg
.nm_extra
= extra
;
472 lwkt_domsg(port
, &msg
.nm_netmsg
.nm_lmsg
, 0);
476 * If we convert all the protosw pr_ functions for all the protocols
477 * to take a message directly, this layer can go away. For the moment
478 * our dispatcher ignores the return value, but since we are handling
479 * the replymsg ourselves we return EASYNC by convention.
483 * Abort and destroy a socket.
486 netmsg_pru_abort(netmsg_t msg
)
488 struct netmsg_pru_abort
*nm
= (void *)msg
;
489 struct socket
*so
= nm
->nm_so
;
492 KKASSERT(so
->so_state
& SS_ABORTING
);
493 so
->so_state
&= ~SS_ABORTING
;
494 error
= nm
->nm_prufn(so
);
497 lwkt_replymsg(&msg
->nm_lmsg
, error
);
502 netmsg_pru_accept(netmsg_t msg
)
504 struct netmsg_pru_accept
*nm
= (void *)msg
;
506 lwkt_replymsg(&msg
->nm_lmsg
, nm
->nm_prufn(nm
->nm_so
, nm
->nm_nam
));
511 netmsg_pru_attach(netmsg_t msg
)
513 struct netmsg_pru_attach
*nm
= (void *)msg
;
515 lwkt_replymsg(&msg
->nm_lmsg
,
516 nm
->nm_prufn(nm
->nm_so
, nm
->nm_proto
, nm
->nm_ai
));
520 netmsg_pru_bind(netmsg_t msg
)
522 struct netmsg_pru_bind
*nm
= (void *)msg
;
524 lwkt_replymsg(&msg
->nm_lmsg
,
525 nm
->nm_prufn(nm
->nm_so
, nm
->nm_nam
, nm
->nm_td
));
529 netmsg_pru_connect(netmsg_t msg
)
531 struct netmsg_pru_connect
*nm
= (void *)msg
;
533 lwkt_replymsg(&msg
->nm_lmsg
,
534 nm
->nm_prufn(nm
->nm_so
, nm
->nm_nam
, nm
->nm_td
));
538 netmsg_pru_connect2(netmsg_t msg
)
540 struct netmsg_pru_connect2
*nm
= (void *)msg
;
542 lwkt_replymsg(&msg
->nm_lmsg
, nm
->nm_prufn(nm
->nm_so1
, nm
->nm_so2
));
546 netmsg_pru_control(netmsg_t msg
)
548 struct netmsg_pru_control
*nm
= (void *)msg
;
551 error
= nm
->nm_prufn(nm
->nm_so
, nm
->nm_cmd
, nm
->nm_data
,
552 nm
->nm_ifp
, nm
->nm_td
);
553 lwkt_replymsg(&msg
->nm_lmsg
, error
);
557 netmsg_pru_detach(netmsg_t msg
)
559 struct netmsg_pru_detach
*nm
= (void *)msg
;
561 lwkt_replymsg(&msg
->nm_lmsg
, nm
->nm_prufn(nm
->nm_so
));
565 netmsg_pru_disconnect(netmsg_t msg
)
567 struct netmsg_pru_disconnect
*nm
= (void *)msg
;
569 lwkt_replymsg(&msg
->nm_lmsg
, nm
->nm_prufn(nm
->nm_so
));
573 netmsg_pru_listen(netmsg_t msg
)
575 struct netmsg_pru_listen
*nm
= (void *)msg
;
577 lwkt_replymsg(&msg
->nm_lmsg
, nm
->nm_prufn(nm
->nm_so
, nm
->nm_td
));
581 netmsg_pru_peeraddr(netmsg_t msg
)
583 struct netmsg_pru_peeraddr
*nm
= (void *)msg
;
585 lwkt_replymsg(&msg
->nm_lmsg
, nm
->nm_prufn(nm
->nm_so
, nm
->nm_nam
));
589 netmsg_pru_rcvd(netmsg_t msg
)
591 struct netmsg_pru_rcvd
*nm
= (void *)msg
;
593 lwkt_replymsg(&msg
->nm_lmsg
, nm
->nm_prufn(nm
->nm_so
, nm
->nm_flags
));
597 netmsg_pru_rcvoob(netmsg_t msg
)
599 struct netmsg_pru_rcvoob
*nm
= (void *)msg
;
601 lwkt_replymsg(&msg
->nm_lmsg
,
602 nm
->nm_prufn(nm
->nm_so
, nm
->nm_m
, nm
->nm_flags
));
606 netmsg_pru_send(netmsg_t msg
)
608 struct netmsg_pru_send
*nm
= (void *)msg
;
611 error
= nm
->nm_prufn(nm
->nm_so
, nm
->nm_flags
, nm
->nm_m
,
612 nm
->nm_addr
, nm
->nm_control
, nm
->nm_td
);
613 lwkt_replymsg(&msg
->nm_lmsg
, error
);
617 netmsg_pru_sense(netmsg_t msg
)
619 struct netmsg_pru_sense
*nm
= (void *)msg
;
621 lwkt_replymsg(&msg
->nm_lmsg
, nm
->nm_prufn(nm
->nm_so
, nm
->nm_stat
));
625 netmsg_pru_shutdown(netmsg_t msg
)
627 struct netmsg_pru_shutdown
*nm
= (void *)msg
;
629 lwkt_replymsg(&msg
->nm_lmsg
, nm
->nm_prufn(nm
->nm_so
));
633 netmsg_pru_sockaddr(netmsg_t msg
)
635 struct netmsg_pru_sockaddr
*nm
= (void *)msg
;
637 lwkt_replymsg(&msg
->nm_lmsg
, nm
->nm_prufn(nm
->nm_so
, nm
->nm_nam
));
641 netmsg_pru_sopoll(netmsg_t msg
)
643 struct netmsg_pru_sopoll
*nm
= (void *)msg
;
646 error
= nm
->nm_prufn(nm
->nm_so
, nm
->nm_events
, nm
->nm_cred
, nm
->nm_td
);
647 lwkt_replymsg(&msg
->nm_lmsg
, error
);
651 netmsg_pru_ctloutput(netmsg_t msg
)
653 struct netmsg_pru_ctloutput
*nm
= (void *)msg
;
655 lwkt_replymsg(&msg
->nm_lmsg
, nm
->nm_prufn(nm
->nm_so
, nm
->nm_sopt
));
659 netmsg_pru_ctlinput(netmsg_t msg
)
661 struct netmsg_pru_ctlinput
*nm
= (void *)msg
;
663 nm
->nm_prufn(nm
->nm_cmd
, nm
->nm_arg
, nm
->nm_extra
);
664 lwkt_replymsg(&nm
->nm_netmsg
.nm_lmsg
, 0);
668 netmsg_pr_timeout(netmsg_t msg
)
670 struct netmsg_pr_timeout
*nm
= (void *)msg
;
672 lwkt_replymsg(&msg
->nm_lmsg
, nm
->nm_prfn());
676 * Handle a predicate event request. This function is only called once
677 * when the predicate message queueing request is received.
680 netmsg_so_notify(netmsg_t netmsg
)
682 struct netmsg_so_notify
*msg
= (void *)netmsg
;
683 struct signalsockbuf
*ssb
;
685 ssb
= (msg
->nm_etype
& NM_REVENT
) ?
686 &msg
->nm_so
->so_rcv
:
690 * Reply immediately if the event has occured, otherwise queue the
693 if (msg
->nm_predicate(&msg
->nm_netmsg
)) {
694 lwkt_replymsg(&msg
->nm_netmsg
.nm_lmsg
,
695 msg
->nm_netmsg
.nm_lmsg
.ms_error
);
697 TAILQ_INSERT_TAIL(&ssb
->ssb_sel
.si_mlist
, msg
, nm_list
);
698 ssb
->ssb_flags
|= SSB_MEVENT
;
703 * Called by doio when trying to abort a netmsg_so_notify message.
704 * Unlike the other functions this one is dispatched directly by
705 * the LWKT subsystem, so it takes a lwkt_msg_t as an argument.
707 * The original message, lmsg, is under the control of the caller and
708 * will not be destroyed until we return so we can safely reference it
709 * in our synchronous abort request.
711 * This part of the abort request occurs on the originating cpu which
712 * means we may race the message flags and the original message may
713 * not even have been processed by the target cpu yet.
716 netmsg_so_notify_doabort(lwkt_msg_t lmsg
)
718 struct netmsg_so_notify_abort msg
;
720 if ((lmsg
->ms_flags
& (MSGF_DONE
| MSGF_REPLY
)) == 0) {
721 netmsg_init(&msg
.nm_netmsg
, &curthread
->td_msgport
, 0,
722 netmsg_so_notify_abort
);
723 msg
.nm_notifymsg
= (void *)lmsg
;
724 lwkt_domsg(lmsg
->ms_target_port
, &msg
.nm_netmsg
.nm_lmsg
, 0);
729 * Predicate requests can be aborted. This function is only called once
730 * and will interlock against processing/reply races (since such races
731 * occur on the same thread that controls the port where the abort is
734 * This part of the abort request occurs on the target cpu. The message
735 * flags must be tested again in case the test that we did on the
736 * originating cpu raced. Since messages are handled in sequence, the
737 * original message will have already been handled by the loop and either
738 * replied to or queued.
740 * We really only need to interlock with MSGF_REPLY (a bit that is set on
741 * our cpu when we reply). Note that MSGF_DONE is not set until the
742 * reply reaches the originating cpu. Test both bits anyway.
745 netmsg_so_notify_abort(netmsg_t netmsg
)
747 struct netmsg_so_notify_abort
*abrtmsg
= (void *)netmsg
;
748 struct netmsg_so_notify
*msg
= abrtmsg
->nm_notifymsg
;
749 struct signalsockbuf
*ssb
;
752 * The original notify message is not destroyed until after the
753 * abort request is returned, so we can check its state.
755 if ((msg
->nm_netmsg
.nm_lmsg
.ms_flags
& (MSGF_DONE
| MSGF_REPLY
)) == 0) {
756 ssb
= (msg
->nm_etype
& NM_REVENT
) ?
757 &msg
->nm_so
->so_rcv
:
759 TAILQ_REMOVE(&ssb
->ssb_sel
.si_mlist
, msg
, nm_list
);
760 lwkt_replymsg(&msg
->nm_netmsg
.nm_lmsg
, EINTR
);
764 * Reply to the abort message
766 lwkt_replymsg(&abrtmsg
->nm_netmsg
.nm_lmsg
, 0);