2 * Copyright (c) 2015 Alexander Motin <mav@FreeBSD.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer,
10 * without modification, immediately at the beginning of the file.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
30 #include <sys/param.h>
31 #include <sys/systm.h>
32 #include <sys/kernel.h>
33 #include <sys/kthread.h>
34 #include <sys/types.h>
35 #include <sys/limits.h>
37 #include <sys/module.h>
38 #include <sys/mutex.h>
39 #include <sys/condvar.h>
40 #include <sys/malloc.h>
44 #include <sys/queue.h>
45 #include <sys/sysctl.h>
46 #include <sys/socket.h>
47 #include <sys/socketvar.h>
49 #include <netinet/in.h>
50 #include <netinet/tcp.h>
54 #include <cam/scsi/scsi_all.h>
55 #include <cam/scsi/scsi_da.h>
56 #include <cam/ctl/ctl_io.h>
57 #include <cam/ctl/ctl.h>
58 #include <cam/ctl/ctl_frontend.h>
59 #include <cam/ctl/ctl_util.h>
60 #include <cam/ctl/ctl_backend.h>
61 #include <cam/ctl/ctl_ioctl.h>
62 #include <cam/ctl/ctl_ha.h>
63 #include <cam/ctl/ctl_private.h>
64 #include <cam/ctl/ctl_debug.h>
65 #include <cam/ctl/ctl_error.h>
67 #if (__FreeBSD_version < 1100000)
74 mbufq_init(struct mbufq *q, int limit)
77 q->head = q->tail = NULL;
81 mbufq_drain(struct mbufq *q)
85 while ((m = q->head) != NULL) {
86 q->head = m->m_nextpkt;
93 mbufq_dequeue(struct mbufq *q)
101 q->head = m->m_nextpkt;
108 mbufq_enqueue(struct mbufq *q, struct mbuf *m)
113 q->tail->m_nextpkt = m;
120 sbavail(struct sockbuf *sb)
125 #if (__FreeBSD_version < 1000000)
126 #define mtodo(m, o) ((void *)(((m)->m_data) + (o)))
135 struct ha_dt_msg_wire {
136 ctl_ha_dt_cmd command;
143 struct ctl_softc *ha_ctl_softc;
144 ctl_evt_handler ha_handler[CTL_HA_CHAN_MAX];
146 struct sockaddr_in ha_peer_in;
147 struct socket *ha_lso;
148 struct socket *ha_so;
149 struct mbufq ha_sendq;
150 struct mbuf *ha_sending;
159 eventhandler_tag ha_shutdown_eh;
160 TAILQ_HEAD(, ctl_ha_dt_req) ha_dts;
164 ctl_ha_conn_wake(struct ha_softc *softc)
167 mtx_lock(&softc->ha_lock);
168 softc->ha_wakeup = 1;
169 mtx_unlock(&softc->ha_lock);
170 wakeup(&softc->ha_wakeup);
174 ctl_ha_lupcall(struct socket *so, void *arg, int waitflag)
176 struct ha_softc *softc = arg;
178 ctl_ha_conn_wake(softc);
183 ctl_ha_rupcall(struct socket *so, void *arg, int waitflag)
185 struct ha_softc *softc = arg;
187 wakeup(&softc->ha_receiving);
192 ctl_ha_supcall(struct socket *so, void *arg, int waitflag)
194 struct ha_softc *softc = arg;
196 ctl_ha_conn_wake(softc);
201 ctl_ha_evt(struct ha_softc *softc, ctl_ha_channel ch, ctl_ha_event evt,
206 if (ch < CTL_HA_CHAN_MAX) {
207 if (softc->ha_handler[ch])
208 softc->ha_handler[ch](ch, evt, param);
211 for (i = 0; i < CTL_HA_CHAN_MAX; i++) {
212 if (softc->ha_handler[i])
213 softc->ha_handler[i](i, evt, param);
218 ctl_ha_close(struct ha_softc *softc)
220 struct socket *so = softc->ha_so;
223 if (softc->ha_connected || softc->ha_disconnect) {
224 softc->ha_connected = 0;
225 mbufq_drain(&softc->ha_sendq);
226 m_freem(softc->ha_sending);
227 softc->ha_sending = NULL;
231 SOCKBUF_LOCK(&so->so_rcv);
232 soupcall_clear(so, SO_RCV);
233 while (softc->ha_receiving) {
234 wakeup(&softc->ha_receiving);
235 msleep(&softc->ha_receiving, SOCKBUF_MTX(&so->so_rcv),
238 SOCKBUF_UNLOCK(&so->so_rcv);
239 SOCKBUF_LOCK(&so->so_snd);
240 soupcall_clear(so, SO_SND);
241 SOCKBUF_UNLOCK(&so->so_snd);
243 if (softc->ha_connect)
244 pause("reconnect", hz / 2);
248 ctl_ha_evt(softc, CTL_HA_CHAN_MAX, CTL_HA_EVT_LINK_CHANGE,
249 (softc->ha_connect || softc->ha_listen) ?
250 CTL_HA_LINK_UNKNOWN : CTL_HA_LINK_OFFLINE);
255 ctl_ha_lclose(struct ha_softc *softc)
259 SOCKBUF_LOCK(&softc->ha_lso->so_rcv);
260 soupcall_clear(softc->ha_lso, SO_RCV);
261 SOCKBUF_UNLOCK(&softc->ha_lso->so_rcv);
262 soclose(softc->ha_lso);
263 softc->ha_lso = NULL;
268 ctl_ha_rx_thread(void *arg)
270 struct ha_softc *softc = arg;
271 struct socket *so = softc->ha_so;
272 struct ha_msg_wire wire_hdr;
275 int error, flags, next;
277 bzero(&wire_hdr, sizeof(wire_hdr));
279 if (wire_hdr.length > 0)
280 next = wire_hdr.length;
282 next = sizeof(wire_hdr);
283 SOCKBUF_LOCK(&so->so_rcv);
284 while (sbavail(&so->so_rcv) < next || softc->ha_disconnect) {
285 if (softc->ha_connected == 0 || softc->ha_disconnect ||
287 (so->so_rcv.sb_state & SBS_CANTRCVMORE)) {
290 so->so_rcv.sb_lowat = next;
291 msleep(&softc->ha_receiving, SOCKBUF_MTX(&so->so_rcv),
294 SOCKBUF_UNLOCK(&so->so_rcv);
296 if (wire_hdr.length == 0) {
297 iov.iov_base = &wire_hdr;
298 iov.iov_len = sizeof(wire_hdr);
301 uio.uio_rw = UIO_READ;
302 uio.uio_segflg = UIO_SYSSPACE;
303 uio.uio_td = curthread;
304 uio.uio_resid = sizeof(wire_hdr);
305 flags = MSG_DONTWAIT;
306 error = soreceive(softc->ha_so, NULL, &uio, NULL,
309 printf("%s: header receive error %d\n",
311 SOCKBUF_LOCK(&so->so_rcv);
315 ctl_ha_evt(softc, wire_hdr.channel,
316 CTL_HA_EVT_MSG_RECV, wire_hdr.length);
322 softc->ha_receiving = 0;
323 wakeup(&softc->ha_receiving);
324 SOCKBUF_UNLOCK(&so->so_rcv);
325 ctl_ha_conn_wake(softc);
330 ctl_ha_send(struct ha_softc *softc)
332 struct socket *so = softc->ha_so;
336 if (softc->ha_sending == NULL) {
337 mtx_lock(&softc->ha_lock);
338 softc->ha_sending = mbufq_dequeue(&softc->ha_sendq);
339 mtx_unlock(&softc->ha_lock);
340 if (softc->ha_sending == NULL) {
341 so->so_snd.sb_lowat = so->so_snd.sb_hiwat + 1;
345 SOCKBUF_LOCK(&so->so_snd);
346 if (sbspace(&so->so_snd) < softc->ha_sending->m_pkthdr.len) {
347 so->so_snd.sb_lowat = softc->ha_sending->m_pkthdr.len;
348 SOCKBUF_UNLOCK(&so->so_snd);
351 SOCKBUF_UNLOCK(&so->so_snd);
352 error = sosend(softc->ha_so, NULL, NULL, softc->ha_sending,
353 NULL, MSG_DONTWAIT, curthread);
354 softc->ha_sending = NULL;
356 printf("%s: sosend() error %d\n", __func__, error);
363 ctl_ha_sock_setup(struct ha_softc *softc)
366 struct socket *so = softc->ha_so;
370 error = soreserve(so, val, val);
372 printf("%s: soreserve failed %d\n", __func__, error);
374 SOCKBUF_LOCK(&so->so_rcv);
375 so->so_rcv.sb_lowat = sizeof(struct ha_msg_wire);
376 soupcall_set(so, SO_RCV, ctl_ha_rupcall, softc);
377 SOCKBUF_UNLOCK(&so->so_rcv);
378 SOCKBUF_LOCK(&so->so_snd);
379 so->so_snd.sb_lowat = sizeof(struct ha_msg_wire);
380 soupcall_set(so, SO_SND, ctl_ha_supcall, softc);
381 SOCKBUF_UNLOCK(&so->so_snd);
383 bzero(&opt, sizeof(struct sockopt));
384 opt.sopt_dir = SOPT_SET;
385 opt.sopt_level = SOL_SOCKET;
386 opt.sopt_name = SO_KEEPALIVE;
388 opt.sopt_valsize = sizeof(val);
390 error = sosetopt(so, &opt);
392 printf("%s: KEEPALIVE setting failed %d\n", __func__, error);
394 opt.sopt_level = IPPROTO_TCP;
395 opt.sopt_name = TCP_NODELAY;
397 error = sosetopt(so, &opt);
399 printf("%s: NODELAY setting failed %d\n", __func__, error);
401 opt.sopt_name = TCP_KEEPINIT;
403 error = sosetopt(so, &opt);
405 printf("%s: KEEPINIT setting failed %d\n", __func__, error);
407 opt.sopt_name = TCP_KEEPIDLE;
409 error = sosetopt(so, &opt);
411 printf("%s: KEEPIDLE setting failed %d\n", __func__, error);
413 opt.sopt_name = TCP_KEEPINTVL;
415 error = sosetopt(so, &opt);
417 printf("%s: KEEPINTVL setting failed %d\n", __func__, error);
419 opt.sopt_name = TCP_KEEPCNT;
421 error = sosetopt(so, &opt);
423 printf("%s: KEEPCNT setting failed %d\n", __func__, error);
427 ctl_ha_connect(struct ha_softc *softc)
429 struct thread *td = curthread;
430 struct sockaddr_in sa;
434 /* Create the socket */
435 error = socreate(PF_INET, &so, SOCK_STREAM,
436 IPPROTO_TCP, td->td_ucred, td);
438 printf("%s: socreate() error %d\n", __func__, error);
442 ctl_ha_sock_setup(softc);
444 memcpy(&sa, &softc->ha_peer_in, sizeof(sa));
445 error = soconnect(so, (struct sockaddr *)&sa, td);
447 printf("%s: soconnect() error %d\n", __func__, error);
458 ctl_ha_accept(struct ha_softc *softc)
461 struct sockaddr *sap;
465 if (softc->ha_lso->so_rcv.sb_state & SBS_CANTRCVMORE)
466 softc->ha_lso->so_error = ECONNABORTED;
467 if (softc->ha_lso->so_error) {
468 error = softc->ha_lso->so_error;
469 softc->ha_lso->so_error = 0;
471 printf("%s: socket error %d\n", __func__, error);
474 so = TAILQ_FIRST(&softc->ha_lso->so_comp);
477 return (EWOULDBLOCK);
479 KASSERT(!(so->so_qstate & SQ_INCOMP), ("accept1: so SQ_INCOMP"));
480 KASSERT(so->so_qstate & SQ_COMP, ("accept1: so not SQ_COMP"));
483 * Before changing the flags on the socket, we have to bump the
484 * reference count. Otherwise, if the protocol calls sofree(),
485 * the socket will be released due to a zero refcount.
487 SOCK_LOCK(so); /* soref() and so_state update */
488 soref(so); /* file descriptor reference */
490 TAILQ_REMOVE(&softc->ha_lso->so_comp, so, so_list);
491 softc->ha_lso->so_qlen--;
492 so->so_state |= SS_NBIO;
493 so->so_qstate &= ~SQ_COMP;
500 error = soaccept(so, &sap);
502 printf("%s: soaccept() error %d\n", __func__, error);
510 ctl_ha_sock_setup(softc);
514 ctl_ha_lclose(softc);
519 ctl_ha_listen(struct ha_softc *softc)
521 struct thread *td = curthread;
522 struct sockaddr_in sa;
526 /* Create the socket */
527 if (softc->ha_lso == NULL) {
528 error = socreate(PF_INET, &softc->ha_lso, SOCK_STREAM,
529 IPPROTO_TCP, td->td_ucred, td);
531 printf("%s: socreate() error %d\n", __func__, error);
534 bzero(&opt, sizeof(struct sockopt));
535 opt.sopt_dir = SOPT_SET;
536 opt.sopt_level = SOL_SOCKET;
537 opt.sopt_name = SO_REUSEADDR;
539 opt.sopt_valsize = sizeof(val);
541 error = sosetopt(softc->ha_lso, &opt);
543 printf("%s: REUSEADDR setting failed %d\n",
546 bzero(&opt, sizeof(struct sockopt));
547 opt.sopt_dir = SOPT_SET;
548 opt.sopt_level = SOL_SOCKET;
549 opt.sopt_name = SO_REUSEPORT;
551 opt.sopt_valsize = sizeof(val);
553 error = sosetopt(softc->ha_lso, &opt);
555 printf("%s: REUSEPORT setting failed %d\n",
558 SOCKBUF_LOCK(&softc->ha_lso->so_rcv);
559 soupcall_set(softc->ha_lso, SO_RCV, ctl_ha_lupcall, softc);
560 SOCKBUF_UNLOCK(&softc->ha_lso->so_rcv);
563 memcpy(&sa, &softc->ha_peer_in, sizeof(sa));
564 error = sobind(softc->ha_lso, (struct sockaddr *)&sa, td);
566 printf("%s: sobind() error %d\n", __func__, error);
569 error = solisten(softc->ha_lso, 1, td);
571 printf("%s: solisten() error %d\n", __func__, error);
577 ctl_ha_lclose(softc);
582 ctl_ha_conn_thread(void *arg)
584 struct ha_softc *softc = arg;
588 if (softc->ha_disconnect || softc->ha_shutdown) {
590 if (softc->ha_disconnect == 2 || softc->ha_shutdown)
591 ctl_ha_lclose(softc);
592 softc->ha_disconnect = 0;
593 if (softc->ha_shutdown)
595 } else if (softc->ha_so != NULL &&
596 (softc->ha_so->so_error ||
597 softc->ha_so->so_rcv.sb_state & SBS_CANTRCVMORE))
599 if (softc->ha_so == NULL) {
600 if (softc->ha_lso != NULL)
601 ctl_ha_accept(softc);
602 else if (softc->ha_listen)
603 ctl_ha_listen(softc);
604 else if (softc->ha_connect)
605 ctl_ha_connect(softc);
607 if (softc->ha_so != NULL) {
608 if (softc->ha_connected == 0 &&
609 softc->ha_so->so_error == 0 &&
610 (softc->ha_so->so_state & SS_ISCONNECTING) == 0) {
611 softc->ha_connected = 1;
612 ctl_ha_evt(softc, CTL_HA_CHAN_MAX,
613 CTL_HA_EVT_LINK_CHANGE,
615 softc->ha_receiving = 1;
616 error = kproc_kthread_add(ctl_ha_rx_thread,
617 softc, &softc->ha_ctl_softc->ctl_proc,
618 NULL, 0, 0, "ctl", "ha_rx");
620 printf("Error creating CTL HA rx thread!\n");
621 softc->ha_receiving = 0;
622 softc->ha_disconnect = 1;
627 mtx_lock(&softc->ha_lock);
628 if (softc->ha_so != NULL &&
629 (softc->ha_so->so_error ||
630 softc->ha_so->so_rcv.sb_state & SBS_CANTRCVMORE))
632 else if (!softc->ha_wakeup)
633 msleep(&softc->ha_wakeup, &softc->ha_lock, 0, "-", hz);
634 softc->ha_wakeup = 0;
635 mtx_unlock(&softc->ha_lock);
637 mtx_lock(&softc->ha_lock);
638 softc->ha_shutdown = 2;
639 wakeup(&softc->ha_wakeup);
640 mtx_unlock(&softc->ha_lock);
645 ctl_ha_peer_sysctl(SYSCTL_HANDLER_ARGS)
647 struct ha_softc *softc = (struct ha_softc *)arg1;
648 struct sockaddr_in *sa;
649 int error, b1, b2, b3, b4, p, num;
652 strlcpy(buf, softc->ha_peer, sizeof(buf));
653 error = sysctl_handle_string(oidp, buf, sizeof(buf), req);
654 if ((error != 0) || (req->newptr == NULL) ||
655 strncmp(buf, softc->ha_peer, sizeof(buf)) == 0)
658 sa = &softc->ha_peer_in;
659 mtx_lock(&softc->ha_lock);
660 if ((num = sscanf(buf, "connect %d.%d.%d.%d:%d",
661 &b1, &b2, &b3, &b4, &p)) >= 4) {
662 softc->ha_connect = 1;
663 softc->ha_listen = 0;
664 } else if ((num = sscanf(buf, "listen %d.%d.%d.%d:%d",
665 &b1, &b2, &b3, &b4, &p)) >= 4) {
666 softc->ha_connect = 0;
667 softc->ha_listen = 1;
669 softc->ha_connect = 0;
670 softc->ha_listen = 0;
676 strlcpy(softc->ha_peer, buf, sizeof(softc->ha_peer));
677 if (softc->ha_connect || softc->ha_listen) {
678 memset(sa, 0, sizeof(*sa));
679 sa->sin_len = sizeof(struct sockaddr_in);
680 sa->sin_family = AF_INET;
681 sa->sin_port = htons((num >= 5) ? p : 999);
682 sa->sin_addr.s_addr =
683 htonl((b1 << 24) + (b2 << 16) + (b3 << 8) + b4);
685 softc->ha_disconnect = 2;
686 softc->ha_wakeup = 1;
687 mtx_unlock(&softc->ha_lock);
688 wakeup(&softc->ha_wakeup);
693 ctl_ha_msg_register(ctl_ha_channel channel, ctl_evt_handler handler)
695 struct ha_softc *softc = &ha_softc;
697 KASSERT(channel < CTL_HA_CHAN_MAX,
698 ("Wrong CTL HA channel %d", channel));
699 softc->ha_handler[channel] = handler;
700 return (CTL_HA_STATUS_SUCCESS);
704 ctl_ha_msg_deregister(ctl_ha_channel channel)
706 struct ha_softc *softc = &ha_softc;
708 KASSERT(channel < CTL_HA_CHAN_MAX,
709 ("Wrong CTL HA channel %d", channel));
710 softc->ha_handler[channel] = NULL;
711 return (CTL_HA_STATUS_SUCCESS);
715 * Receive a message of the specified size.
718 ctl_ha_msg_recv(ctl_ha_channel channel, void *addr, size_t len,
721 struct ha_softc *softc = &ha_softc;
726 if (!softc->ha_connected)
727 return (CTL_HA_STATUS_DISCONNECT);
733 uio.uio_rw = UIO_READ;
734 uio.uio_segflg = UIO_SYSSPACE;
735 uio.uio_td = curthread;
737 flags = wait ? 0 : MSG_DONTWAIT;
738 error = soreceive(softc->ha_so, NULL, &uio, NULL, NULL, &flags);
740 return (CTL_HA_STATUS_SUCCESS);
742 /* Consider all errors fatal for HA sanity. */
743 mtx_lock(&softc->ha_lock);
744 if (softc->ha_connected) {
745 softc->ha_disconnect = 1;
746 softc->ha_wakeup = 1;
747 wakeup(&softc->ha_wakeup);
749 mtx_unlock(&softc->ha_lock);
750 return (CTL_HA_STATUS_ERROR);
754 * Send a message of the specified size.
757 ctl_ha_msg_send2(ctl_ha_channel channel, const void *addr, size_t len,
758 const void *addr2, size_t len2, int wait)
760 struct ha_softc *softc = &ha_softc;
761 struct mbuf *mb, *newmb;
762 struct ha_msg_wire hdr;
765 if (!softc->ha_connected)
766 return (CTL_HA_STATUS_DISCONNECT);
768 newmb = m_getm2(NULL, sizeof(hdr) + len + len2, wait, MT_DATA,
771 /* Consider all errors fatal for HA sanity. */
772 mtx_lock(&softc->ha_lock);
773 if (softc->ha_connected) {
774 softc->ha_disconnect = 1;
775 softc->ha_wakeup = 1;
776 wakeup(&softc->ha_wakeup);
778 mtx_unlock(&softc->ha_lock);
779 printf("%s: Can't allocate mbuf chain\n", __func__);
780 return (CTL_HA_STATUS_ERROR);
782 hdr.channel = channel;
783 hdr.length = len + len2;
785 memcpy(mtodo(mb, 0), &hdr, sizeof(hdr));
786 mb->m_len += sizeof(hdr);
788 for (; mb != NULL && off < len; mb = mb->m_next) {
789 copylen = min(M_TRAILINGSPACE(mb), len - off);
790 memcpy(mtodo(mb, mb->m_len), (const char *)addr + off, copylen);
791 mb->m_len += copylen;
796 KASSERT(off == len, ("%s: off (%zu) != len (%zu)", __func__,
799 for (; mb != NULL && off < len2; mb = mb->m_next) {
800 copylen = min(M_TRAILINGSPACE(mb), len2 - off);
801 memcpy(mtodo(mb, mb->m_len), (const char *)addr2 + off, copylen);
802 mb->m_len += copylen;
805 KASSERT(off == len2, ("%s: off (%zu) != len2 (%zu)", __func__,
807 newmb->m_pkthdr.len = sizeof(hdr) + len + len2;
809 mtx_lock(&softc->ha_lock);
810 if (!softc->ha_connected) {
811 mtx_unlock(&softc->ha_lock);
813 return (CTL_HA_STATUS_DISCONNECT);
815 mbufq_enqueue(&softc->ha_sendq, newmb);
816 softc->ha_wakeup = 1;
817 mtx_unlock(&softc->ha_lock);
818 wakeup(&softc->ha_wakeup);
819 return (CTL_HA_STATUS_SUCCESS);
823 ctl_ha_msg_send(ctl_ha_channel channel, const void *addr, size_t len,
827 return (ctl_ha_msg_send2(channel, addr, len, NULL, 0, wait));
831 ctl_ha_msg_abort(ctl_ha_channel channel)
833 struct ha_softc *softc = &ha_softc;
835 mtx_lock(&softc->ha_lock);
836 softc->ha_disconnect = 1;
837 softc->ha_wakeup = 1;
838 mtx_unlock(&softc->ha_lock);
839 wakeup(&softc->ha_wakeup);
840 return (CTL_HA_STATUS_SUCCESS);
844 * Allocate a data transfer request structure.
846 struct ctl_ha_dt_req *
847 ctl_dt_req_alloc(void)
850 return (malloc(sizeof(struct ctl_ha_dt_req), M_CTL, M_WAITOK | M_ZERO));
854 * Free a data transfer request structure.
857 ctl_dt_req_free(struct ctl_ha_dt_req *req)
864 * Issue a DMA request for a single buffer.
867 ctl_dt_single(struct ctl_ha_dt_req *req)
869 struct ha_softc *softc = &ha_softc;
870 struct ha_dt_msg_wire wire_dt;
871 ctl_ha_status status;
873 wire_dt.command = req->command;
874 wire_dt.size = req->size;
875 wire_dt.local = req->local;
876 wire_dt.remote = req->remote;
877 if (req->command == CTL_HA_DT_CMD_READ && req->callback != NULL) {
878 mtx_lock(&softc->ha_lock);
879 TAILQ_INSERT_TAIL(&softc->ha_dts, req, links);
880 mtx_unlock(&softc->ha_lock);
881 ctl_ha_msg_send(CTL_HA_CHAN_DATA, &wire_dt, sizeof(wire_dt),
883 return (CTL_HA_STATUS_WAIT);
885 if (req->command == CTL_HA_DT_CMD_READ) {
886 status = ctl_ha_msg_send(CTL_HA_CHAN_DATA, &wire_dt,
887 sizeof(wire_dt), M_WAITOK);
889 status = ctl_ha_msg_send2(CTL_HA_CHAN_DATA, &wire_dt,
890 sizeof(wire_dt), req->local, req->size, M_WAITOK);
896 ctl_dt_event_handler(ctl_ha_channel channel, ctl_ha_event event, int param)
898 struct ha_softc *softc = &ha_softc;
899 struct ctl_ha_dt_req *req;
900 ctl_ha_status isc_status;
902 if (event == CTL_HA_EVT_MSG_RECV) {
903 struct ha_dt_msg_wire wire_dt;
907 size = min(sizeof(wire_dt), param);
908 isc_status = ctl_ha_msg_recv(CTL_HA_CHAN_DATA, &wire_dt,
910 if (isc_status != CTL_HA_STATUS_SUCCESS) {
911 printf("%s: Error receiving message: %d\n",
912 __func__, isc_status);
916 if (wire_dt.command == CTL_HA_DT_CMD_READ) {
917 wire_dt.command = CTL_HA_DT_CMD_WRITE;
919 wire_dt.local = wire_dt.remote;
920 wire_dt.remote = tmp;
921 ctl_ha_msg_send2(CTL_HA_CHAN_DATA, &wire_dt,
922 sizeof(wire_dt), wire_dt.local, wire_dt.size,
924 } else if (wire_dt.command == CTL_HA_DT_CMD_WRITE) {
925 isc_status = ctl_ha_msg_recv(CTL_HA_CHAN_DATA,
926 wire_dt.remote, wire_dt.size, M_WAITOK);
927 mtx_lock(&softc->ha_lock);
928 TAILQ_FOREACH(req, &softc->ha_dts, links) {
929 if (req->local == wire_dt.remote) {
930 TAILQ_REMOVE(&softc->ha_dts, req, links);
934 mtx_unlock(&softc->ha_lock);
936 req->ret = isc_status;
940 } else if (event == CTL_HA_EVT_LINK_CHANGE) {
941 CTL_DEBUG_PRINT(("%s: Link state change to %d\n", __func__,
943 if (param != CTL_HA_LINK_ONLINE) {
944 mtx_lock(&softc->ha_lock);
945 while ((req = TAILQ_FIRST(&softc->ha_dts)) != NULL) {
946 TAILQ_REMOVE(&softc->ha_dts, req, links);
947 mtx_unlock(&softc->ha_lock);
948 req->ret = CTL_HA_STATUS_DISCONNECT;
950 mtx_lock(&softc->ha_lock);
952 mtx_unlock(&softc->ha_lock);
955 printf("%s: Unknown event %d\n", __func__, event);
961 ctl_ha_msg_init(struct ctl_softc *ctl_softc)
963 struct ha_softc *softc = &ha_softc;
966 softc->ha_ctl_softc = ctl_softc;
967 mtx_init(&softc->ha_lock, "CTL HA mutex", NULL, MTX_DEF);
968 mbufq_init(&softc->ha_sendq, INT_MAX);
969 TAILQ_INIT(&softc->ha_dts);
970 error = kproc_kthread_add(ctl_ha_conn_thread, softc,
971 &ctl_softc->ctl_proc, NULL, 0, 0, "ctl", "ha_tx");
973 printf("error creating CTL HA connection thread!\n");
974 mtx_destroy(&softc->ha_lock);
975 return (CTL_HA_STATUS_ERROR);
977 softc->ha_shutdown_eh = EVENTHANDLER_REGISTER(shutdown_pre_sync,
978 ctl_ha_msg_shutdown, ctl_softc, SHUTDOWN_PRI_FIRST);
979 SYSCTL_ADD_PROC(&ctl_softc->sysctl_ctx,
980 SYSCTL_CHILDREN(ctl_softc->sysctl_tree),
981 OID_AUTO, "ha_peer", CTLTYPE_STRING | CTLFLAG_RWTUN,
982 softc, 0, ctl_ha_peer_sysctl, "A", "HA peer connection method");
984 if (ctl_ha_msg_register(CTL_HA_CHAN_DATA, ctl_dt_event_handler)
985 != CTL_HA_STATUS_SUCCESS) {
986 printf("%s: ctl_ha_msg_register failed.\n", __func__);
989 return (CTL_HA_STATUS_SUCCESS);
993 ctl_ha_msg_shutdown(struct ctl_softc *ctl_softc)
995 struct ha_softc *softc = &ha_softc;
997 /* Disconnect and shutdown threads. */
998 mtx_lock(&softc->ha_lock);
999 if (softc->ha_shutdown < 2) {
1000 softc->ha_shutdown = 1;
1001 softc->ha_wakeup = 1;
1002 wakeup(&softc->ha_wakeup);
1003 while (softc->ha_shutdown < 2) {
1004 msleep(&softc->ha_wakeup, &softc->ha_lock, 0,
1008 mtx_unlock(&softc->ha_lock);
1012 ctl_ha_msg_destroy(struct ctl_softc *ctl_softc)
1014 struct ha_softc *softc = &ha_softc;
1016 if (softc->ha_shutdown_eh != NULL) {
1017 EVENTHANDLER_DEREGISTER(shutdown_pre_sync,
1018 softc->ha_shutdown_eh);
1019 softc->ha_shutdown_eh = NULL;
1022 ctl_ha_msg_shutdown(ctl_softc); /* Just in case. */
1024 if (ctl_ha_msg_deregister(CTL_HA_CHAN_DATA) != CTL_HA_STATUS_SUCCESS)
1025 printf("%s: ctl_ha_msg_deregister failed.\n", __func__);
1027 mtx_destroy(&softc->ha_lock);
1028 return (CTL_HA_STATUS_SUCCESS);