ctl_ha.c revision 288795
1/*- 2 * Copyright (c) 2015 Alexander Motin <mav@FreeBSD.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 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. 14 * 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. 25 */ 26 27#include <sys/cdefs.h> 28__FBSDID("$FreeBSD: stable/10/sys/cam/ctl/ctl_ha.c 288795 2015-10-05 10:58:41Z mav $"); 29 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> 36#include <sys/lock.h> 37#include <sys/module.h> 38#include <sys/mutex.h> 39#include <sys/condvar.h> 40#include <sys/malloc.h> 41#include <sys/mbuf.h> 42#include <sys/proc.h> 43#include <sys/conf.h> 44#include <sys/queue.h> 45#include <sys/sysctl.h> 46#include <sys/socket.h> 47#include <sys/socketvar.h> 48#include <sys/uio.h> 49#include <netinet/in.h> 50#include <netinet/tcp.h> 51#include <vm/uma.h> 52 53#include <cam/cam.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> 66 67#if (__FreeBSD_version < 1100000) 68struct mbufq { 69 struct mbuf *head; 70 struct mbuf *tail; 71}; 72 73static void 74mbufq_init(struct mbufq *q, int limit) 75{ 76 77 q->head = q->tail = NULL; 78} 79 80static void 81mbufq_drain(struct mbufq *q) 82{ 83 struct mbuf *m; 84 85 while ((m = q->head) != NULL) { 86 q->head = m->m_nextpkt; 87 m_freem(m); 88 } 89 q->tail = NULL; 90} 91 92static struct mbuf * 93mbufq_dequeue(struct mbufq *q) 94{ 95 struct mbuf *m; 96 97 m = q->head; 98 if (m) { 99 if (q->tail == m) 100 q->tail = NULL; 101 q->head = m->m_nextpkt; 102 m->m_nextpkt = NULL; 103 } 104 return (m); 105} 106 107static void 108mbufq_enqueue(struct mbufq *q, struct mbuf *m) 109{ 110 111 m->m_nextpkt = NULL; 112 if (q->tail) 113 q->tail->m_nextpkt = m; 114 else 115 q->head = m; 116 q->tail = m; 117} 118 119static u_int 120sbavail(struct sockbuf *sb) 121{ 122 return (sb->sb_cc); 123} 124 125#if (__FreeBSD_version < 1000000) 126#define mtodo(m, o) ((void *)(((m)->m_data) + (o))) 127#endif 128#endif 129 130struct ha_msg_wire { 131 uint32_t channel; 132 uint32_t length; 133}; 134 135struct ha_dt_msg_wire { 136 ctl_ha_dt_cmd command; 137 uint32_t size; 138 uint8_t *local; 139 uint8_t *remote; 140}; 141 142struct ha_softc { 143 struct ctl_softc *ha_ctl_softc; 144 ctl_evt_handler ha_handler[CTL_HA_CHAN_MAX]; 145 char ha_peer[128]; 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; 151 struct mtx ha_lock; 152 int ha_connect; 153 int ha_listen; 154 int ha_connected; 155 int ha_receiving; 156 int ha_wakeup; 157 int ha_disconnect; 158 int ha_shutdown; 159 eventhandler_tag ha_shutdown_eh; 160 TAILQ_HEAD(, ctl_ha_dt_req) ha_dts; 161} ha_softc; 162 163static void 164ctl_ha_conn_wake(struct ha_softc *softc) 165{ 166 167 mtx_lock(&softc->ha_lock); 168 softc->ha_wakeup = 1; 169 mtx_unlock(&softc->ha_lock); 170 wakeup(&softc->ha_wakeup); 171} 172 173static int 174ctl_ha_lupcall(struct socket *so, void *arg, int waitflag) 175{ 176 struct ha_softc *softc = arg; 177 178 ctl_ha_conn_wake(softc); 179 return (SU_OK); 180} 181 182static int 183ctl_ha_rupcall(struct socket *so, void *arg, int waitflag) 184{ 185 struct ha_softc *softc = arg; 186 187 wakeup(&softc->ha_receiving); 188 return (SU_OK); 189} 190 191static int 192ctl_ha_supcall(struct socket *so, void *arg, int waitflag) 193{ 194 struct ha_softc *softc = arg; 195 196 ctl_ha_conn_wake(softc); 197 return (SU_OK); 198} 199 200static void 201ctl_ha_evt(struct ha_softc *softc, ctl_ha_channel ch, ctl_ha_event evt, 202 int param) 203{ 204 int i; 205 206 if (ch < CTL_HA_CHAN_MAX) { 207 if (softc->ha_handler[ch]) 208 softc->ha_handler[ch](ch, evt, param); 209 return; 210 } 211 for (i = 0; i < CTL_HA_CHAN_MAX; i++) { 212 if (softc->ha_handler[i]) 213 softc->ha_handler[i](i, evt, param); 214 } 215} 216 217static void 218ctl_ha_close(struct ha_softc *softc) 219{ 220 struct socket *so = softc->ha_so; 221 int report = 0; 222 223 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; 228 report = 1; 229 } 230 if (so) { 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), 236 0, "ha_rx exit", 0); 237 } 238 SOCKBUF_UNLOCK(&so->so_rcv); 239 SOCKBUF_LOCK(&so->so_snd); 240 soupcall_clear(so, SO_SND); 241 SOCKBUF_UNLOCK(&so->so_snd); 242 softc->ha_so = NULL; 243 if (softc->ha_connect) 244 pause("reconnect", hz / 2); 245 soclose(so); 246 } 247 if (report) { 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); 251 } 252} 253 254static void 255ctl_ha_lclose(struct ha_softc *softc) 256{ 257 258 if (softc->ha_lso) { 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; 264 } 265} 266 267static void 268ctl_ha_rx_thread(void *arg) 269{ 270 struct ha_softc *softc = arg; 271 struct socket *so = softc->ha_so; 272 struct ha_msg_wire wire_hdr; 273 struct uio uio; 274 struct iovec iov; 275 int error, flags, next; 276 277 bzero(&wire_hdr, sizeof(wire_hdr)); 278 while (1) { 279 if (wire_hdr.length > 0) 280 next = wire_hdr.length; 281 else 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 || 286 so->so_error || 287 (so->so_rcv.sb_state & SBS_CANTRCVMORE)) { 288 goto errout; 289 } 290 so->so_rcv.sb_lowat = next; 291 msleep(&softc->ha_receiving, SOCKBUF_MTX(&so->so_rcv), 292 0, "-", 0); 293 } 294 SOCKBUF_UNLOCK(&so->so_rcv); 295 296 if (wire_hdr.length == 0) { 297 iov.iov_base = &wire_hdr; 298 iov.iov_len = sizeof(wire_hdr); 299 uio.uio_iov = &iov; 300 uio.uio_iovcnt = 1; 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, 307 NULL, &flags); 308 if (error != 0) { 309 printf("%s: header receive error %d\n", 310 __func__, error); 311 SOCKBUF_LOCK(&so->so_rcv); 312 goto errout; 313 } 314 } else { 315 ctl_ha_evt(softc, wire_hdr.channel, 316 CTL_HA_EVT_MSG_RECV, wire_hdr.length); 317 wire_hdr.length = 0; 318 } 319 } 320 321errout: 322 softc->ha_receiving = 0; 323 wakeup(&softc->ha_receiving); 324 SOCKBUF_UNLOCK(&so->so_rcv); 325 ctl_ha_conn_wake(softc); 326 kthread_exit(); 327} 328 329static void 330ctl_ha_send(struct ha_softc *softc) 331{ 332 struct socket *so = softc->ha_so; 333 int error; 334 335 while (1) { 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; 342 break; 343 } 344 } 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); 349 break; 350 } 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; 355 if (error != 0) { 356 printf("%s: sosend() error %d\n", __func__, error); 357 return; 358 } 359 }; 360} 361 362static void 363ctl_ha_sock_setup(struct ha_softc *softc) 364{ 365 struct sockopt opt; 366 struct socket *so = softc->ha_so; 367 int error, val; 368 369 val = 1024 * 1024; 370 error = soreserve(so, val, val); 371 if (error) 372 printf("%s: soreserve failed %d\n", __func__, error); 373 374 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); 382 383 bzero(&opt, sizeof(struct sockopt)); 384 opt.sopt_dir = SOPT_SET; 385 opt.sopt_level = SOL_SOCKET; 386 opt.sopt_name = SO_KEEPALIVE; 387 opt.sopt_val = &val; 388 opt.sopt_valsize = sizeof(val); 389 val = 1; 390 error = sosetopt(so, &opt); 391 if (error) 392 printf("%s: KEEPALIVE setting failed %d\n", __func__, error); 393 394 opt.sopt_level = IPPROTO_TCP; 395 opt.sopt_name = TCP_NODELAY; 396 val = 1; 397 error = sosetopt(so, &opt); 398 if (error) 399 printf("%s: NODELAY setting failed %d\n", __func__, error); 400 401 opt.sopt_name = TCP_KEEPINIT; 402 val = 3; 403 error = sosetopt(so, &opt); 404 if (error) 405 printf("%s: KEEPINIT setting failed %d\n", __func__, error); 406 407 opt.sopt_name = TCP_KEEPIDLE; 408 val = 1; 409 error = sosetopt(so, &opt); 410 if (error) 411 printf("%s: KEEPIDLE setting failed %d\n", __func__, error); 412 413 opt.sopt_name = TCP_KEEPINTVL; 414 val = 1; 415 error = sosetopt(so, &opt); 416 if (error) 417 printf("%s: KEEPINTVL setting failed %d\n", __func__, error); 418 419 opt.sopt_name = TCP_KEEPCNT; 420 val = 5; 421 error = sosetopt(so, &opt); 422 if (error) 423 printf("%s: KEEPCNT setting failed %d\n", __func__, error); 424} 425 426static int 427ctl_ha_connect(struct ha_softc *softc) 428{ 429 struct thread *td = curthread; 430 struct socket *so; 431 int error; 432 433 /* Create the socket */ 434 error = socreate(PF_INET, &so, SOCK_STREAM, 435 IPPROTO_TCP, td->td_ucred, td); 436 if (error != 0) { 437 printf("%s: socreate() error %d\n", __func__, error); 438 return (error); 439 } 440 softc->ha_so = so; 441 ctl_ha_sock_setup(softc); 442 443 error = soconnect(so, (struct sockaddr *)&softc->ha_peer_in, td); 444 if (error != 0) { 445 printf("%s: soconnect() error %d\n", __func__, error); 446 goto out; 447 } 448 return (0); 449 450out: 451 ctl_ha_close(softc); 452 return (error); 453} 454 455static int 456ctl_ha_accept(struct ha_softc *softc) 457{ 458 struct socket *so; 459 struct sockaddr *sap; 460 int error; 461 462 ACCEPT_LOCK(); 463 if (softc->ha_lso->so_rcv.sb_state & SBS_CANTRCVMORE) 464 softc->ha_lso->so_error = ECONNABORTED; 465 if (softc->ha_lso->so_error) { 466 error = softc->ha_lso->so_error; 467 softc->ha_lso->so_error = 0; 468 ACCEPT_UNLOCK(); 469 printf("%s: socket error %d\n", __func__, error); 470 goto out; 471 } 472 so = TAILQ_FIRST(&softc->ha_lso->so_comp); 473 if (so == NULL) { 474 ACCEPT_UNLOCK(); 475 return (EWOULDBLOCK); 476 } 477 KASSERT(!(so->so_qstate & SQ_INCOMP), ("accept1: so SQ_INCOMP")); 478 KASSERT(so->so_qstate & SQ_COMP, ("accept1: so not SQ_COMP")); 479 480 /* 481 * Before changing the flags on the socket, we have to bump the 482 * reference count. Otherwise, if the protocol calls sofree(), 483 * the socket will be released due to a zero refcount. 484 */ 485 SOCK_LOCK(so); /* soref() and so_state update */ 486 soref(so); /* file descriptor reference */ 487 488 TAILQ_REMOVE(&softc->ha_lso->so_comp, so, so_list); 489 softc->ha_lso->so_qlen--; 490 so->so_state |= SS_NBIO; 491 so->so_qstate &= ~SQ_COMP; 492 so->so_head = NULL; 493 494 SOCK_UNLOCK(so); 495 ACCEPT_UNLOCK(); 496 497 sap = NULL; 498 error = soaccept(so, &sap); 499 if (error != 0) { 500 printf("%s: soaccept() error %d\n", __func__, error); 501 if (sap != NULL) 502 free(sap, M_SONAME); 503 goto out; 504 } 505 if (sap != NULL) 506 free(sap, M_SONAME); 507 softc->ha_so = so; 508 ctl_ha_sock_setup(softc); 509 return (0); 510 511out: 512 ctl_ha_lclose(softc); 513 return (error); 514} 515 516static int 517ctl_ha_listen(struct ha_softc *softc) 518{ 519 struct thread *td = curthread; 520 struct sockopt opt; 521 int error, val; 522 523 /* Create the socket */ 524 if (softc->ha_lso == NULL) { 525 error = socreate(PF_INET, &softc->ha_lso, SOCK_STREAM, 526 IPPROTO_TCP, td->td_ucred, td); 527 if (error != 0) { 528 printf("%s: socreate() error %d\n", __func__, error); 529 return (error); 530 } 531 bzero(&opt, sizeof(struct sockopt)); 532 opt.sopt_dir = SOPT_SET; 533 opt.sopt_level = SOL_SOCKET; 534 opt.sopt_name = SO_REUSEADDR; 535 opt.sopt_val = &val; 536 opt.sopt_valsize = sizeof(val); 537 val = 1; 538 error = sosetopt(softc->ha_lso, &opt); 539 if (error) { 540 printf("%s: REUSEADDR setting failed %d\n", 541 __func__, error); 542 } 543 bzero(&opt, sizeof(struct sockopt)); 544 opt.sopt_dir = SOPT_SET; 545 opt.sopt_level = SOL_SOCKET; 546 opt.sopt_name = SO_REUSEPORT; 547 opt.sopt_val = &val; 548 opt.sopt_valsize = sizeof(val); 549 val = 1; 550 error = sosetopt(softc->ha_lso, &opt); 551 if (error) { 552 printf("%s: REUSEPORT setting failed %d\n", 553 __func__, error); 554 } 555 SOCKBUF_LOCK(&softc->ha_lso->so_rcv); 556 soupcall_set(softc->ha_lso, SO_RCV, ctl_ha_lupcall, softc); 557 SOCKBUF_UNLOCK(&softc->ha_lso->so_rcv); 558 } 559 560 error = sobind(softc->ha_lso, (struct sockaddr *)&softc->ha_peer_in, td); 561 if (error != 0) { 562 printf("%s: sobind() error %d\n", __func__, error); 563 goto out; 564 } 565 error = solisten(softc->ha_lso, 1, td); 566 if (error != 0) { 567 printf("%s: solisten() error %d\n", __func__, error); 568 goto out; 569 } 570 return (0); 571 572out: 573 ctl_ha_lclose(softc); 574 return (error); 575} 576 577static void 578ctl_ha_conn_thread(void *arg) 579{ 580 struct ha_softc *softc = arg; 581 int error; 582 583 while (1) { 584 if (softc->ha_disconnect || softc->ha_shutdown) { 585 ctl_ha_close(softc); 586 if (softc->ha_disconnect == 2 || softc->ha_shutdown) 587 ctl_ha_lclose(softc); 588 softc->ha_disconnect = 0; 589 if (softc->ha_shutdown) 590 break; 591 } else if (softc->ha_so != NULL && 592 (softc->ha_so->so_error || 593 softc->ha_so->so_rcv.sb_state & SBS_CANTRCVMORE)) 594 ctl_ha_close(softc); 595 if (softc->ha_so == NULL) { 596 if (softc->ha_lso != NULL) 597 ctl_ha_accept(softc); 598 else if (softc->ha_listen) 599 ctl_ha_listen(softc); 600 else if (softc->ha_connect) 601 ctl_ha_connect(softc); 602 } 603 if (softc->ha_so != NULL) { 604 if (softc->ha_connected == 0 && 605 softc->ha_so->so_error == 0 && 606 (softc->ha_so->so_state & SS_ISCONNECTING) == 0) { 607 softc->ha_connected = 1; 608 ctl_ha_evt(softc, CTL_HA_CHAN_MAX, 609 CTL_HA_EVT_LINK_CHANGE, 610 CTL_HA_LINK_ONLINE); 611 softc->ha_receiving = 1; 612 error = kproc_kthread_add(ctl_ha_rx_thread, 613 softc, &softc->ha_ctl_softc->ctl_proc, 614 NULL, 0, 0, "ctl", "ha_rx"); 615 if (error != 0) { 616 printf("Error creating CTL HA rx thread!\n"); 617 softc->ha_receiving = 0; 618 softc->ha_disconnect = 1; 619 } 620 } 621 ctl_ha_send(softc); 622 } 623 mtx_lock(&softc->ha_lock); 624 if (softc->ha_so != NULL && 625 (softc->ha_so->so_error || 626 softc->ha_so->so_rcv.sb_state & SBS_CANTRCVMORE)) 627 ; 628 else if (!softc->ha_wakeup) 629 msleep(&softc->ha_wakeup, &softc->ha_lock, 0, "-", hz); 630 softc->ha_wakeup = 0; 631 mtx_unlock(&softc->ha_lock); 632 } 633 mtx_lock(&softc->ha_lock); 634 softc->ha_shutdown = 2; 635 wakeup(&softc->ha_wakeup); 636 mtx_unlock(&softc->ha_lock); 637 kthread_exit(); 638} 639 640static int 641ctl_ha_peer_sysctl(SYSCTL_HANDLER_ARGS) 642{ 643 struct ha_softc *softc = (struct ha_softc *)arg1; 644 struct sockaddr_in *sa; 645 int error, b1, b2, b3, b4, p, num; 646 char buf[128]; 647 648 strlcpy(buf, softc->ha_peer, sizeof(buf)); 649 error = sysctl_handle_string(oidp, buf, sizeof(buf), req); 650 if ((error != 0) || (req->newptr == NULL) || 651 strncmp(buf, softc->ha_peer, sizeof(buf)) == 0) 652 return (error); 653 654 sa = &softc->ha_peer_in; 655 mtx_lock(&softc->ha_lock); 656 if ((num = sscanf(buf, "connect %d.%d.%d.%d:%d", 657 &b1, &b2, &b3, &b4, &p)) >= 4) { 658 softc->ha_connect = 1; 659 softc->ha_listen = 0; 660 } else if ((num = sscanf(buf, "listen %d.%d.%d.%d:%d", 661 &b1, &b2, &b3, &b4, &p)) >= 4) { 662 softc->ha_connect = 0; 663 softc->ha_listen = 1; 664 } else { 665 softc->ha_connect = 0; 666 softc->ha_listen = 0; 667 if (buf[0] != 0) { 668 buf[0] = 0; 669 error = EINVAL; 670 } 671 } 672 strlcpy(softc->ha_peer, buf, sizeof(softc->ha_peer)); 673 if (softc->ha_connect || softc->ha_listen) { 674 memset(sa, 0, sizeof(*sa)); 675 sa->sin_len = sizeof(struct sockaddr_in); 676 sa->sin_family = AF_INET; 677 sa->sin_port = htons((num >= 5) ? p : 999); 678 sa->sin_addr.s_addr = 679 htonl((b1 << 24) + (b2 << 16) + (b3 << 8) + b4); 680 } 681 softc->ha_disconnect = 2; 682 softc->ha_wakeup = 1; 683 mtx_unlock(&softc->ha_lock); 684 wakeup(&softc->ha_wakeup); 685 return (error); 686} 687 688ctl_ha_status 689ctl_ha_msg_register(ctl_ha_channel channel, ctl_evt_handler handler) 690{ 691 struct ha_softc *softc = &ha_softc; 692 693 KASSERT(channel < CTL_HA_CHAN_MAX, 694 ("Wrong CTL HA channel %d", channel)); 695 softc->ha_handler[channel] = handler; 696 return (CTL_HA_STATUS_SUCCESS); 697} 698 699ctl_ha_status 700ctl_ha_msg_deregister(ctl_ha_channel channel) 701{ 702 struct ha_softc *softc = &ha_softc; 703 704 KASSERT(channel < CTL_HA_CHAN_MAX, 705 ("Wrong CTL HA channel %d", channel)); 706 softc->ha_handler[channel] = NULL; 707 return (CTL_HA_STATUS_SUCCESS); 708} 709 710/* 711 * Receive a message of the specified size. 712 */ 713ctl_ha_status 714ctl_ha_msg_recv(ctl_ha_channel channel, void *addr, size_t len, 715 int wait) 716{ 717 struct ha_softc *softc = &ha_softc; 718 struct uio uio; 719 struct iovec iov; 720 int error, flags; 721 722 if (!softc->ha_connected) 723 return (CTL_HA_STATUS_DISCONNECT); 724 725 iov.iov_base = addr; 726 iov.iov_len = len; 727 uio.uio_iov = &iov; 728 uio.uio_iovcnt = 1; 729 uio.uio_rw = UIO_READ; 730 uio.uio_segflg = UIO_SYSSPACE; 731 uio.uio_td = curthread; 732 uio.uio_resid = len; 733 flags = wait ? 0 : MSG_DONTWAIT; 734 error = soreceive(softc->ha_so, NULL, &uio, NULL, NULL, &flags); 735 if (error == 0) 736 return (CTL_HA_STATUS_SUCCESS); 737 738 /* Consider all errors fatal for HA sanity. */ 739 mtx_lock(&softc->ha_lock); 740 if (softc->ha_connected) { 741 softc->ha_disconnect = 1; 742 softc->ha_wakeup = 1; 743 wakeup(&softc->ha_wakeup); 744 } 745 mtx_unlock(&softc->ha_lock); 746 return (CTL_HA_STATUS_ERROR); 747} 748 749/* 750 * Send a message of the specified size. 751 */ 752ctl_ha_status 753ctl_ha_msg_send2(ctl_ha_channel channel, const void *addr, size_t len, 754 const void *addr2, size_t len2, int wait) 755{ 756 struct ha_softc *softc = &ha_softc; 757 struct mbuf *mb, *newmb; 758 struct ha_msg_wire hdr; 759 size_t copylen, off; 760 761 if (!softc->ha_connected) 762 return (CTL_HA_STATUS_DISCONNECT); 763 764 newmb = m_getm2(NULL, sizeof(hdr) + len + len2, wait, MT_DATA, 765 M_PKTHDR); 766 if (newmb == NULL) { 767 /* Consider all errors fatal for HA sanity. */ 768 mtx_lock(&softc->ha_lock); 769 if (softc->ha_connected) { 770 softc->ha_disconnect = 1; 771 softc->ha_wakeup = 1; 772 wakeup(&softc->ha_wakeup); 773 } 774 mtx_unlock(&softc->ha_lock); 775 printf("%s: Can't allocate mbuf chain\n", __func__); 776 return (CTL_HA_STATUS_ERROR); 777 } 778 hdr.channel = channel; 779 hdr.length = len + len2; 780 mb = newmb; 781 memcpy(mtodo(mb, 0), &hdr, sizeof(hdr)); 782 mb->m_len += sizeof(hdr); 783 off = 0; 784 for (; mb != NULL && off < len; mb = mb->m_next) { 785 copylen = min(M_TRAILINGSPACE(mb), len - off); 786 memcpy(mtodo(mb, mb->m_len), (const char *)addr + off, copylen); 787 mb->m_len += copylen; 788 off += copylen; 789 if (off == len) 790 break; 791 } 792 KASSERT(off == len, ("%s: off (%zu) != len (%zu)", __func__, 793 off, len)); 794 off = 0; 795 for (; mb != NULL && off < len2; mb = mb->m_next) { 796 copylen = min(M_TRAILINGSPACE(mb), len2 - off); 797 memcpy(mtodo(mb, mb->m_len), (const char *)addr2 + off, copylen); 798 mb->m_len += copylen; 799 off += copylen; 800 } 801 KASSERT(off == len2, ("%s: off (%zu) != len2 (%zu)", __func__, 802 off, len2)); 803 newmb->m_pkthdr.len = sizeof(hdr) + len + len2; 804 805 mtx_lock(&softc->ha_lock); 806 if (!softc->ha_connected) { 807 mtx_unlock(&softc->ha_lock); 808 m_freem(newmb); 809 return (CTL_HA_STATUS_DISCONNECT); 810 } 811 mbufq_enqueue(&softc->ha_sendq, newmb); 812 softc->ha_wakeup = 1; 813 mtx_unlock(&softc->ha_lock); 814 wakeup(&softc->ha_wakeup); 815 return (CTL_HA_STATUS_SUCCESS); 816} 817 818ctl_ha_status 819ctl_ha_msg_send(ctl_ha_channel channel, const void *addr, size_t len, 820 int wait) 821{ 822 823 return (ctl_ha_msg_send2(channel, addr, len, NULL, 0, wait)); 824} 825 826ctl_ha_status 827ctl_ha_msg_abort(ctl_ha_channel channel) 828{ 829 struct ha_softc *softc = &ha_softc; 830 831 mtx_lock(&softc->ha_lock); 832 softc->ha_disconnect = 1; 833 softc->ha_wakeup = 1; 834 mtx_unlock(&softc->ha_lock); 835 wakeup(&softc->ha_wakeup); 836 return (CTL_HA_STATUS_SUCCESS); 837} 838 839/* 840 * Allocate a data transfer request structure. 841 */ 842struct ctl_ha_dt_req * 843ctl_dt_req_alloc(void) 844{ 845 846 return (malloc(sizeof(struct ctl_ha_dt_req), M_CTL, M_WAITOK | M_ZERO)); 847} 848 849/* 850 * Free a data transfer request structure. 851 */ 852void 853ctl_dt_req_free(struct ctl_ha_dt_req *req) 854{ 855 856 free(req, M_CTL); 857} 858 859/* 860 * Issue a DMA request for a single buffer. 861 */ 862ctl_ha_status 863ctl_dt_single(struct ctl_ha_dt_req *req) 864{ 865 struct ha_softc *softc = &ha_softc; 866 struct ha_dt_msg_wire wire_dt; 867 ctl_ha_status status; 868 869 wire_dt.command = req->command; 870 wire_dt.size = req->size; 871 wire_dt.local = req->local; 872 wire_dt.remote = req->remote; 873 if (req->command == CTL_HA_DT_CMD_READ && req->callback != NULL) { 874 mtx_lock(&softc->ha_lock); 875 TAILQ_INSERT_TAIL(&softc->ha_dts, req, links); 876 mtx_unlock(&softc->ha_lock); 877 ctl_ha_msg_send(CTL_HA_CHAN_DATA, &wire_dt, sizeof(wire_dt), 878 M_WAITOK); 879 return (CTL_HA_STATUS_WAIT); 880 } 881 if (req->command == CTL_HA_DT_CMD_READ) { 882 status = ctl_ha_msg_send(CTL_HA_CHAN_DATA, &wire_dt, 883 sizeof(wire_dt), M_WAITOK); 884 } else { 885 status = ctl_ha_msg_send2(CTL_HA_CHAN_DATA, &wire_dt, 886 sizeof(wire_dt), req->local, req->size, M_WAITOK); 887 } 888 return (status); 889} 890 891static void 892ctl_dt_event_handler(ctl_ha_channel channel, ctl_ha_event event, int param) 893{ 894 struct ha_softc *softc = &ha_softc; 895 struct ctl_ha_dt_req *req; 896 ctl_ha_status isc_status; 897 898 if (event == CTL_HA_EVT_MSG_RECV) { 899 struct ha_dt_msg_wire wire_dt; 900 uint8_t *tmp; 901 int size; 902 903 size = min(sizeof(wire_dt), param); 904 isc_status = ctl_ha_msg_recv(CTL_HA_CHAN_DATA, &wire_dt, 905 size, M_WAITOK); 906 if (isc_status != CTL_HA_STATUS_SUCCESS) { 907 printf("%s: Error receiving message: %d\n", 908 __func__, isc_status); 909 return; 910 } 911 912 if (wire_dt.command == CTL_HA_DT_CMD_READ) { 913 wire_dt.command = CTL_HA_DT_CMD_WRITE; 914 tmp = wire_dt.local; 915 wire_dt.local = wire_dt.remote; 916 wire_dt.remote = tmp; 917 ctl_ha_msg_send2(CTL_HA_CHAN_DATA, &wire_dt, 918 sizeof(wire_dt), wire_dt.local, wire_dt.size, 919 M_WAITOK); 920 } else if (wire_dt.command == CTL_HA_DT_CMD_WRITE) { 921 isc_status = ctl_ha_msg_recv(CTL_HA_CHAN_DATA, 922 wire_dt.remote, wire_dt.size, M_WAITOK); 923 mtx_lock(&softc->ha_lock); 924 TAILQ_FOREACH(req, &softc->ha_dts, links) { 925 if (req->local == wire_dt.remote) { 926 TAILQ_REMOVE(&softc->ha_dts, req, links); 927 break; 928 } 929 } 930 mtx_unlock(&softc->ha_lock); 931 if (req) { 932 req->ret = isc_status; 933 req->callback(req); 934 } 935 } 936 } else if (event == CTL_HA_EVT_LINK_CHANGE) { 937 CTL_DEBUG_PRINT(("%s: Link state change to %d\n", __func__, 938 param)); 939 if (param != CTL_HA_LINK_ONLINE) { 940 mtx_lock(&softc->ha_lock); 941 while ((req = TAILQ_FIRST(&softc->ha_dts)) != NULL) { 942 TAILQ_REMOVE(&softc->ha_dts, req, links); 943 mtx_unlock(&softc->ha_lock); 944 req->ret = CTL_HA_STATUS_DISCONNECT; 945 req->callback(req); 946 mtx_lock(&softc->ha_lock); 947 } 948 mtx_unlock(&softc->ha_lock); 949 } 950 } else { 951 printf("%s: Unknown event %d\n", __func__, event); 952 } 953} 954 955 956ctl_ha_status 957ctl_ha_msg_init(struct ctl_softc *ctl_softc) 958{ 959 struct ha_softc *softc = &ha_softc; 960 int error; 961 962 softc->ha_ctl_softc = ctl_softc; 963 mtx_init(&softc->ha_lock, "CTL HA mutex", NULL, MTX_DEF); 964 mbufq_init(&softc->ha_sendq, INT_MAX); 965 TAILQ_INIT(&softc->ha_dts); 966 error = kproc_kthread_add(ctl_ha_conn_thread, softc, 967 &ctl_softc->ctl_proc, NULL, 0, 0, "ctl", "ha_tx"); 968 if (error != 0) { 969 printf("error creating CTL HA connection thread!\n"); 970 mtx_destroy(&softc->ha_lock); 971 return (CTL_HA_STATUS_ERROR); 972 } 973 softc->ha_shutdown_eh = EVENTHANDLER_REGISTER(shutdown_pre_sync, 974 ctl_ha_msg_shutdown, ctl_softc, SHUTDOWN_PRI_FIRST); 975 SYSCTL_ADD_PROC(&ctl_softc->sysctl_ctx, 976 SYSCTL_CHILDREN(ctl_softc->sysctl_tree), 977 OID_AUTO, "ha_peer", CTLTYPE_STRING | CTLFLAG_RWTUN, 978 softc, 0, ctl_ha_peer_sysctl, "A", "HA peer connection method"); 979 980 if (ctl_ha_msg_register(CTL_HA_CHAN_DATA, ctl_dt_event_handler) 981 != CTL_HA_STATUS_SUCCESS) { 982 printf("%s: ctl_ha_msg_register failed.\n", __func__); 983 } 984 985 return (CTL_HA_STATUS_SUCCESS); 986}; 987 988void 989ctl_ha_msg_shutdown(struct ctl_softc *ctl_softc) 990{ 991 struct ha_softc *softc = &ha_softc; 992 993 /* Disconnect and shutdown threads. */ 994 mtx_lock(&softc->ha_lock); 995 if (softc->ha_shutdown < 2) { 996 softc->ha_shutdown = 1; 997 softc->ha_wakeup = 1; 998 wakeup(&softc->ha_wakeup); 999 while (softc->ha_shutdown < 2) { 1000 msleep(&softc->ha_wakeup, &softc->ha_lock, 0, 1001 "shutdown", hz); 1002 } 1003 } 1004 mtx_unlock(&softc->ha_lock); 1005}; 1006 1007ctl_ha_status 1008ctl_ha_msg_destroy(struct ctl_softc *ctl_softc) 1009{ 1010 struct ha_softc *softc = &ha_softc; 1011 1012 if (softc->ha_shutdown_eh != NULL) { 1013 EVENTHANDLER_DEREGISTER(shutdown_pre_sync, 1014 softc->ha_shutdown_eh); 1015 softc->ha_shutdown_eh = NULL; 1016 } 1017 1018 ctl_ha_msg_shutdown(ctl_softc); /* Just in case. */ 1019 1020 if (ctl_ha_msg_deregister(CTL_HA_CHAN_DATA) != CTL_HA_STATUS_SUCCESS) 1021 printf("%s: ctl_ha_msg_deregister failed.\n", __func__); 1022 1023 mtx_destroy(&softc->ha_lock); 1024 return (CTL_HA_STATUS_SUCCESS); 1025}; 1026