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("$FreeBSD$"); 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) 68 struct mbufq { 69 struct mbuf *head; 70 struct mbuf *tail; 71 }; 72 73 static void 74 mbufq_init(struct mbufq *q, int limit) 75 { 76 77 q->head = q->tail = NULL; 78 } 79 80 static void 81 mbufq_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 92 static struct mbuf * 93 mbufq_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 } 106 107 static void 108 mbufq_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 } 118 119 static u_int 120 sbavail(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 129 130 struct ha_msg_wire { 131 uint32_t channel; 132 uint32_t length; 133 }; 134 135 struct ha_dt_msg_wire { 136 ctl_ha_dt_cmd command; 137 uint32_t size; 138 uint8_t *local; 139 uint8_t *remote; 140 }; 141 142 struct 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; 162 163 static void 164 ctl_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 } 172 173 static int 174 ctl_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 } 181 182 static int 183 ctl_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 } 190 191 static int 192 ctl_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 } 199 200 static void 201 ctl_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 } 216 217 static void 218 ctl_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 } 253 254 static void 255 ctl_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 } 266 267 static void 268 ctl_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 } 320 321 errout: 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 } 328 329 static void 330 ctl_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 } 361 362 static void 363 ctl_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 } 425 426 static int 427 ctl_ha_connect(struct ha_softc *softc) 428 { 429 struct thread *td = curthread; 430 struct sockaddr_in sa; 431 struct socket *so; 432 int error; 433 434 /* Create the socket */ 435 error = socreate(PF_INET, &so, SOCK_STREAM, 436 IPPROTO_TCP, td->td_ucred, td); 437 if (error != 0) { 438 printf("%s: socreate() error %d\n", __func__, error); 439 return (error); 440 } 441 softc->ha_so = so; 442 ctl_ha_sock_setup(softc); 443 444 memcpy(&sa, &softc->ha_peer_in, sizeof(sa)); 445 error = soconnect(so, (struct sockaddr *)&sa, td); 446 if (error != 0) { 447 if (bootverbose) 448 printf("%s: soconnect() error %d\n", __func__, error); 449 goto out; 450 } 451 return (0); 452 453 out: 454 ctl_ha_close(softc); 455 return (error); 456 } 457 458 static int 459 ctl_ha_accept(struct ha_softc *softc) 460 { 461 struct socket *lso, *so; 462 struct sockaddr *sap; 463 int error; 464 465 lso = softc->ha_lso; 466 SOLISTEN_LOCK(lso); 467 error = solisten_dequeue(lso, &so, 0); 468 if (error == EWOULDBLOCK) 469 return (error); 470 if (error) { 471 printf("%s: socket error %d\n", __func__, error); 472 goto out; 473 } 474 475 sap = NULL; 476 error = soaccept(so, &sap); 477 if (error != 0) { 478 printf("%s: soaccept() error %d\n", __func__, error); 479 if (sap != NULL) 480 free(sap, M_SONAME); 481 goto out; 482 } 483 if (sap != NULL) 484 free(sap, M_SONAME); 485 softc->ha_so = so; 486 ctl_ha_sock_setup(softc); 487 return (0); 488 489 out: 490 ctl_ha_lclose(softc); 491 return (error); 492 } 493 494 static int 495 ctl_ha_listen(struct ha_softc *softc) 496 { 497 struct thread *td = curthread; 498 struct sockaddr_in sa; 499 struct sockopt opt; 500 int error, val; 501 502 /* Create the socket */ 503 if (softc->ha_lso == NULL) { 504 error = socreate(PF_INET, &softc->ha_lso, SOCK_STREAM, 505 IPPROTO_TCP, td->td_ucred, td); 506 if (error != 0) { 507 printf("%s: socreate() error %d\n", __func__, error); 508 return (error); 509 } 510 bzero(&opt, sizeof(struct sockopt)); 511 opt.sopt_dir = SOPT_SET; 512 opt.sopt_level = SOL_SOCKET; 513 opt.sopt_name = SO_REUSEADDR; 514 opt.sopt_val = &val; 515 opt.sopt_valsize = sizeof(val); 516 val = 1; 517 error = sosetopt(softc->ha_lso, &opt); 518 if (error) { 519 printf("%s: REUSEADDR setting failed %d\n", 520 __func__, error); 521 } 522 bzero(&opt, sizeof(struct sockopt)); 523 opt.sopt_dir = SOPT_SET; 524 opt.sopt_level = SOL_SOCKET; 525 opt.sopt_name = SO_REUSEPORT; 526 opt.sopt_val = &val; 527 opt.sopt_valsize = sizeof(val); 528 val = 1; 529 error = sosetopt(softc->ha_lso, &opt); 530 if (error) { 531 printf("%s: REUSEPORT setting failed %d\n", 532 __func__, error); 533 } 534 } 535 536 memcpy(&sa, &softc->ha_peer_in, sizeof(sa)); 537 error = sobind(softc->ha_lso, (struct sockaddr *)&sa, td); 538 if (error != 0) { 539 printf("%s: sobind() error %d\n", __func__, error); 540 goto out; 541 } 542 error = solisten(softc->ha_lso, 1, td); 543 if (error != 0) { 544 printf("%s: solisten() error %d\n", __func__, error); 545 goto out; 546 } 547 SOLISTEN_LOCK(softc->ha_lso); 548 softc->ha_lso->so_state |= SS_NBIO; 549 solisten_upcall_set(softc->ha_lso, ctl_ha_lupcall, softc); 550 SOLISTEN_UNLOCK(softc->ha_lso); 551 return (0); 552 553 out: 554 ctl_ha_lclose(softc); 555 return (error); 556 } 557 558 static void 559 ctl_ha_conn_thread(void *arg) 560 { 561 struct ha_softc *softc = arg; 562 int error; 563 564 while (1) { 565 if (softc->ha_disconnect || softc->ha_shutdown) { 566 ctl_ha_close(softc); 567 if (softc->ha_disconnect == 2 || softc->ha_shutdown) 568 ctl_ha_lclose(softc); 569 softc->ha_disconnect = 0; 570 if (softc->ha_shutdown) 571 break; 572 } else if (softc->ha_so != NULL && 573 (softc->ha_so->so_error || 574 softc->ha_so->so_rcv.sb_state & SBS_CANTRCVMORE)) 575 ctl_ha_close(softc); 576 if (softc->ha_so == NULL) { 577 if (softc->ha_lso != NULL) 578 ctl_ha_accept(softc); 579 else if (softc->ha_listen) 580 ctl_ha_listen(softc); 581 else if (softc->ha_connect) 582 ctl_ha_connect(softc); 583 } 584 if (softc->ha_so != NULL) { 585 if (softc->ha_connected == 0 && 586 softc->ha_so->so_error == 0 && 587 (softc->ha_so->so_state & SS_ISCONNECTING) == 0) { 588 softc->ha_connected = 1; 589 ctl_ha_evt(softc, CTL_HA_CHAN_MAX, 590 CTL_HA_EVT_LINK_CHANGE, 591 CTL_HA_LINK_ONLINE); 592 softc->ha_receiving = 1; 593 error = kproc_kthread_add(ctl_ha_rx_thread, 594 softc, &softc->ha_ctl_softc->ctl_proc, 595 NULL, 0, 0, "ctl", "ha_rx"); 596 if (error != 0) { 597 printf("Error creating CTL HA rx thread!\n"); 598 softc->ha_receiving = 0; 599 softc->ha_disconnect = 1; 600 } 601 } 602 ctl_ha_send(softc); 603 } 604 mtx_lock(&softc->ha_lock); 605 if (softc->ha_so != NULL && 606 (softc->ha_so->so_error || 607 softc->ha_so->so_rcv.sb_state & SBS_CANTRCVMORE)) 608 ; 609 else if (!softc->ha_wakeup) 610 msleep(&softc->ha_wakeup, &softc->ha_lock, 0, "-", hz); 611 softc->ha_wakeup = 0; 612 mtx_unlock(&softc->ha_lock); 613 } 614 mtx_lock(&softc->ha_lock); 615 softc->ha_shutdown = 2; 616 wakeup(&softc->ha_wakeup); 617 mtx_unlock(&softc->ha_lock); 618 kthread_exit(); 619 } 620 621 static int 622 ctl_ha_peer_sysctl(SYSCTL_HANDLER_ARGS) 623 { 624 struct ha_softc *softc = (struct ha_softc *)arg1; 625 struct sockaddr_in *sa; 626 int error, b1, b2, b3, b4, p, num; 627 char buf[128]; 628 629 strlcpy(buf, softc->ha_peer, sizeof(buf)); 630 error = sysctl_handle_string(oidp, buf, sizeof(buf), req); 631 if ((error != 0) || (req->newptr == NULL) || 632 strncmp(buf, softc->ha_peer, sizeof(buf)) == 0) 633 return (error); 634 635 sa = &softc->ha_peer_in; 636 mtx_lock(&softc->ha_lock); 637 if ((num = sscanf(buf, "connect %d.%d.%d.%d:%d", 638 &b1, &b2, &b3, &b4, &p)) >= 4) { 639 softc->ha_connect = 1; 640 softc->ha_listen = 0; 641 } else if ((num = sscanf(buf, "listen %d.%d.%d.%d:%d", 642 &b1, &b2, &b3, &b4, &p)) >= 4) { 643 softc->ha_connect = 0; 644 softc->ha_listen = 1; 645 } else { 646 softc->ha_connect = 0; 647 softc->ha_listen = 0; 648 if (buf[0] != 0) { 649 buf[0] = 0; 650 error = EINVAL; 651 } 652 } 653 strlcpy(softc->ha_peer, buf, sizeof(softc->ha_peer)); 654 if (softc->ha_connect || softc->ha_listen) { 655 memset(sa, 0, sizeof(*sa)); 656 sa->sin_len = sizeof(struct sockaddr_in); 657 sa->sin_family = AF_INET; 658 sa->sin_port = htons((num >= 5) ? p : 999); 659 sa->sin_addr.s_addr = 660 htonl((b1 << 24) + (b2 << 16) + (b3 << 8) + b4); 661 } 662 softc->ha_disconnect = 2; 663 softc->ha_wakeup = 1; 664 mtx_unlock(&softc->ha_lock); 665 wakeup(&softc->ha_wakeup); 666 return (error); 667 } 668 669 ctl_ha_status 670 ctl_ha_msg_register(ctl_ha_channel channel, ctl_evt_handler handler) 671 { 672 struct ha_softc *softc = &ha_softc; 673 674 KASSERT(channel < CTL_HA_CHAN_MAX, 675 ("Wrong CTL HA channel %d", channel)); 676 softc->ha_handler[channel] = handler; 677 return (CTL_HA_STATUS_SUCCESS); 678 } 679 680 ctl_ha_status 681 ctl_ha_msg_deregister(ctl_ha_channel channel) 682 { 683 struct ha_softc *softc = &ha_softc; 684 685 KASSERT(channel < CTL_HA_CHAN_MAX, 686 ("Wrong CTL HA channel %d", channel)); 687 softc->ha_handler[channel] = NULL; 688 return (CTL_HA_STATUS_SUCCESS); 689 } 690 691 /* 692 * Receive a message of the specified size. 693 */ 694 ctl_ha_status 695 ctl_ha_msg_recv(ctl_ha_channel channel, void *addr, size_t len, 696 int wait) 697 { 698 struct ha_softc *softc = &ha_softc; 699 struct uio uio; 700 struct iovec iov; 701 int error, flags; 702 703 if (!softc->ha_connected) 704 return (CTL_HA_STATUS_DISCONNECT); 705 706 iov.iov_base = addr; 707 iov.iov_len = len; 708 uio.uio_iov = &iov; 709 uio.uio_iovcnt = 1; 710 uio.uio_rw = UIO_READ; 711 uio.uio_segflg = UIO_SYSSPACE; 712 uio.uio_td = curthread; 713 uio.uio_resid = len; 714 flags = wait ? 0 : MSG_DONTWAIT; 715 error = soreceive(softc->ha_so, NULL, &uio, NULL, NULL, &flags); 716 if (error == 0) 717 return (CTL_HA_STATUS_SUCCESS); 718 719 /* Consider all errors fatal for HA sanity. */ 720 mtx_lock(&softc->ha_lock); 721 if (softc->ha_connected) { 722 softc->ha_disconnect = 1; 723 softc->ha_wakeup = 1; 724 wakeup(&softc->ha_wakeup); 725 } 726 mtx_unlock(&softc->ha_lock); 727 return (CTL_HA_STATUS_ERROR); 728 } 729 730 /* 731 * Send a message of the specified size. 732 */ 733 ctl_ha_status 734 ctl_ha_msg_send2(ctl_ha_channel channel, const void *addr, size_t len, 735 const void *addr2, size_t len2, int wait) 736 { 737 struct ha_softc *softc = &ha_softc; 738 struct mbuf *mb, *newmb; 739 struct ha_msg_wire hdr; 740 size_t copylen, off; 741 742 if (!softc->ha_connected) 743 return (CTL_HA_STATUS_DISCONNECT); 744 745 newmb = m_getm2(NULL, sizeof(hdr) + len + len2, wait, MT_DATA, 746 M_PKTHDR); 747 if (newmb == NULL) { 748 /* Consider all errors fatal for HA sanity. */ 749 mtx_lock(&softc->ha_lock); 750 if (softc->ha_connected) { 751 softc->ha_disconnect = 1; 752 softc->ha_wakeup = 1; 753 wakeup(&softc->ha_wakeup); 754 } 755 mtx_unlock(&softc->ha_lock); 756 printf("%s: Can't allocate mbuf chain\n", __func__); 757 return (CTL_HA_STATUS_ERROR); 758 } 759 hdr.channel = channel; 760 hdr.length = len + len2; 761 mb = newmb; 762 memcpy(mtodo(mb, 0), &hdr, sizeof(hdr)); 763 mb->m_len += sizeof(hdr); 764 off = 0; 765 for (; mb != NULL && off < len; mb = mb->m_next) { 766 copylen = min(M_TRAILINGSPACE(mb), len - off); 767 memcpy(mtodo(mb, mb->m_len), (const char *)addr + off, copylen); 768 mb->m_len += copylen; 769 off += copylen; 770 if (off == len) 771 break; 772 } 773 KASSERT(off == len, ("%s: off (%zu) != len (%zu)", __func__, 774 off, len)); 775 off = 0; 776 for (; mb != NULL && off < len2; mb = mb->m_next) { 777 copylen = min(M_TRAILINGSPACE(mb), len2 - off); 778 memcpy(mtodo(mb, mb->m_len), (const char *)addr2 + off, copylen); 779 mb->m_len += copylen; 780 off += copylen; 781 } 782 KASSERT(off == len2, ("%s: off (%zu) != len2 (%zu)", __func__, 783 off, len2)); 784 newmb->m_pkthdr.len = sizeof(hdr) + len + len2; 785 786 mtx_lock(&softc->ha_lock); 787 if (!softc->ha_connected) { 788 mtx_unlock(&softc->ha_lock); 789 m_freem(newmb); 790 return (CTL_HA_STATUS_DISCONNECT); 791 } 792 mbufq_enqueue(&softc->ha_sendq, newmb); 793 softc->ha_wakeup = 1; 794 mtx_unlock(&softc->ha_lock); 795 wakeup(&softc->ha_wakeup); 796 return (CTL_HA_STATUS_SUCCESS); 797 } 798 799 ctl_ha_status 800 ctl_ha_msg_send(ctl_ha_channel channel, const void *addr, size_t len, 801 int wait) 802 { 803 804 return (ctl_ha_msg_send2(channel, addr, len, NULL, 0, wait)); 805 } 806 807 ctl_ha_status 808 ctl_ha_msg_abort(ctl_ha_channel channel) 809 { 810 struct ha_softc *softc = &ha_softc; 811 812 mtx_lock(&softc->ha_lock); 813 softc->ha_disconnect = 1; 814 softc->ha_wakeup = 1; 815 mtx_unlock(&softc->ha_lock); 816 wakeup(&softc->ha_wakeup); 817 return (CTL_HA_STATUS_SUCCESS); 818 } 819 820 /* 821 * Allocate a data transfer request structure. 822 */ 823 struct ctl_ha_dt_req * 824 ctl_dt_req_alloc(void) 825 { 826 827 return (malloc(sizeof(struct ctl_ha_dt_req), M_CTL, M_WAITOK | M_ZERO)); 828 } 829 830 /* 831 * Free a data transfer request structure. 832 */ 833 void 834 ctl_dt_req_free(struct ctl_ha_dt_req *req) 835 { 836 837 free(req, M_CTL); 838 } 839 840 /* 841 * Issue a DMA request for a single buffer. 842 */ 843 ctl_ha_status 844 ctl_dt_single(struct ctl_ha_dt_req *req) 845 { 846 struct ha_softc *softc = &ha_softc; 847 struct ha_dt_msg_wire wire_dt; 848 ctl_ha_status status; 849 850 wire_dt.command = req->command; 851 wire_dt.size = req->size; 852 wire_dt.local = req->local; 853 wire_dt.remote = req->remote; 854 if (req->command == CTL_HA_DT_CMD_READ && req->callback != NULL) { 855 mtx_lock(&softc->ha_lock); 856 TAILQ_INSERT_TAIL(&softc->ha_dts, req, links); 857 mtx_unlock(&softc->ha_lock); 858 ctl_ha_msg_send(CTL_HA_CHAN_DATA, &wire_dt, sizeof(wire_dt), 859 M_WAITOK); 860 return (CTL_HA_STATUS_WAIT); 861 } 862 if (req->command == CTL_HA_DT_CMD_READ) { 863 status = ctl_ha_msg_send(CTL_HA_CHAN_DATA, &wire_dt, 864 sizeof(wire_dt), M_WAITOK); 865 } else { 866 status = ctl_ha_msg_send2(CTL_HA_CHAN_DATA, &wire_dt, 867 sizeof(wire_dt), req->local, req->size, M_WAITOK); 868 } 869 return (status); 870 } 871 872 static void 873 ctl_dt_event_handler(ctl_ha_channel channel, ctl_ha_event event, int param) 874 { 875 struct ha_softc *softc = &ha_softc; 876 struct ctl_ha_dt_req *req; 877 ctl_ha_status isc_status; 878 879 if (event == CTL_HA_EVT_MSG_RECV) { 880 struct ha_dt_msg_wire wire_dt; 881 uint8_t *tmp; 882 int size; 883 884 size = min(sizeof(wire_dt), param); 885 isc_status = ctl_ha_msg_recv(CTL_HA_CHAN_DATA, &wire_dt, 886 size, M_WAITOK); 887 if (isc_status != CTL_HA_STATUS_SUCCESS) { 888 printf("%s: Error receiving message: %d\n", 889 __func__, isc_status); 890 return; 891 } 892 893 if (wire_dt.command == CTL_HA_DT_CMD_READ) { 894 wire_dt.command = CTL_HA_DT_CMD_WRITE; 895 tmp = wire_dt.local; 896 wire_dt.local = wire_dt.remote; 897 wire_dt.remote = tmp; 898 ctl_ha_msg_send2(CTL_HA_CHAN_DATA, &wire_dt, 899 sizeof(wire_dt), wire_dt.local, wire_dt.size, 900 M_WAITOK); 901 } else if (wire_dt.command == CTL_HA_DT_CMD_WRITE) { 902 isc_status = ctl_ha_msg_recv(CTL_HA_CHAN_DATA, 903 wire_dt.remote, wire_dt.size, M_WAITOK); 904 mtx_lock(&softc->ha_lock); 905 TAILQ_FOREACH(req, &softc->ha_dts, links) { 906 if (req->local == wire_dt.remote) { 907 TAILQ_REMOVE(&softc->ha_dts, req, links); 908 break; 909 } 910 } 911 mtx_unlock(&softc->ha_lock); 912 if (req) { 913 req->ret = isc_status; 914 req->callback(req); 915 } 916 } 917 } else if (event == CTL_HA_EVT_LINK_CHANGE) { 918 CTL_DEBUG_PRINT(("%s: Link state change to %d\n", __func__, 919 param)); 920 if (param != CTL_HA_LINK_ONLINE) { 921 mtx_lock(&softc->ha_lock); 922 while ((req = TAILQ_FIRST(&softc->ha_dts)) != NULL) { 923 TAILQ_REMOVE(&softc->ha_dts, req, links); 924 mtx_unlock(&softc->ha_lock); 925 req->ret = CTL_HA_STATUS_DISCONNECT; 926 req->callback(req); 927 mtx_lock(&softc->ha_lock); 928 } 929 mtx_unlock(&softc->ha_lock); 930 } 931 } else { 932 printf("%s: Unknown event %d\n", __func__, event); 933 } 934 } 935 936 937 ctl_ha_status 938 ctl_ha_msg_init(struct ctl_softc *ctl_softc) 939 { 940 struct ha_softc *softc = &ha_softc; 941 int error; 942 943 softc->ha_ctl_softc = ctl_softc; 944 mtx_init(&softc->ha_lock, "CTL HA mutex", NULL, MTX_DEF); 945 mbufq_init(&softc->ha_sendq, INT_MAX); 946 TAILQ_INIT(&softc->ha_dts); 947 error = kproc_kthread_add(ctl_ha_conn_thread, softc, 948 &ctl_softc->ctl_proc, NULL, 0, 0, "ctl", "ha_tx"); 949 if (error != 0) { 950 printf("error creating CTL HA connection thread!\n"); 951 mtx_destroy(&softc->ha_lock); 952 return (CTL_HA_STATUS_ERROR); 953 } 954 softc->ha_shutdown_eh = EVENTHANDLER_REGISTER(shutdown_pre_sync, 955 ctl_ha_msg_shutdown, ctl_softc, SHUTDOWN_PRI_FIRST); 956 SYSCTL_ADD_PROC(&ctl_softc->sysctl_ctx, 957 SYSCTL_CHILDREN(ctl_softc->sysctl_tree), 958 OID_AUTO, "ha_peer", CTLTYPE_STRING | CTLFLAG_RWTUN, 959 softc, 0, ctl_ha_peer_sysctl, "A", "HA peer connection method"); 960 961 if (ctl_ha_msg_register(CTL_HA_CHAN_DATA, ctl_dt_event_handler) 962 != CTL_HA_STATUS_SUCCESS) { 963 printf("%s: ctl_ha_msg_register failed.\n", __func__); 964 } 965 966 return (CTL_HA_STATUS_SUCCESS); 967 }; 968 969 void 970 ctl_ha_msg_shutdown(struct ctl_softc *ctl_softc) 971 { 972 struct ha_softc *softc = &ha_softc; 973 974 /* Disconnect and shutdown threads. */ 975 mtx_lock(&softc->ha_lock); 976 if (softc->ha_shutdown < 2) { 977 softc->ha_shutdown = 1; 978 softc->ha_wakeup = 1; 979 wakeup(&softc->ha_wakeup); 980 while (softc->ha_shutdown < 2 && !SCHEDULER_STOPPED()) { 981 msleep(&softc->ha_wakeup, &softc->ha_lock, 0, 982 "shutdown", hz); 983 } 984 } 985 mtx_unlock(&softc->ha_lock); 986 }; 987 988 ctl_ha_status 989 ctl_ha_msg_destroy(struct ctl_softc *ctl_softc) 990 { 991 struct ha_softc *softc = &ha_softc; 992 993 if (softc->ha_shutdown_eh != NULL) { 994 EVENTHANDLER_DEREGISTER(shutdown_pre_sync, 995 softc->ha_shutdown_eh); 996 softc->ha_shutdown_eh = NULL; 997 } 998 999 ctl_ha_msg_shutdown(ctl_softc); /* Just in case. */ 1000 1001 if (ctl_ha_msg_deregister(CTL_HA_CHAN_DATA) != CTL_HA_STATUS_SUCCESS) 1002 printf("%s: ctl_ha_msg_deregister failed.\n", __func__); 1003 1004 mtx_destroy(&softc->ha_lock); 1005 return (CTL_HA_STATUS_SUCCESS); 1006 }; 1007