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 312587 2017-01-21 08:43:41Z 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 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 453out: 454 ctl_ha_close(softc); 455 return (error); 456} 457 458static int 459ctl_ha_accept(struct ha_softc *softc) 460{ 461 struct socket *so; 462 struct sockaddr *sap; 463 int error; 464 465 ACCEPT_LOCK(); 466 if (softc->ha_lso->so_rcv.sb_state & SBS_CANTRCVMORE) 467 softc->ha_lso->so_error = ECONNABORTED; 468 if (softc->ha_lso->so_error) { 469 error = softc->ha_lso->so_error; 470 softc->ha_lso->so_error = 0; 471 ACCEPT_UNLOCK(); 472 printf("%s: socket error %d\n", __func__, error); 473 goto out; 474 } 475 so = TAILQ_FIRST(&softc->ha_lso->so_comp); 476 if (so == NULL) { 477 ACCEPT_UNLOCK(); 478 return (EWOULDBLOCK); 479 } 480 KASSERT(!(so->so_qstate & SQ_INCOMP), ("accept1: so SQ_INCOMP")); 481 KASSERT(so->so_qstate & SQ_COMP, ("accept1: so not SQ_COMP")); 482 483 /* 484 * Before changing the flags on the socket, we have to bump the 485 * reference count. Otherwise, if the protocol calls sofree(), 486 * the socket will be released due to a zero refcount. 487 */ 488 SOCK_LOCK(so); /* soref() and so_state update */ 489 soref(so); /* file descriptor reference */ 490 491 TAILQ_REMOVE(&softc->ha_lso->so_comp, so, so_list); 492 softc->ha_lso->so_qlen--; 493 so->so_state |= SS_NBIO; 494 so->so_qstate &= ~SQ_COMP; 495 so->so_head = NULL; 496 497 SOCK_UNLOCK(so); 498 ACCEPT_UNLOCK(); 499 500 sap = NULL; 501 error = soaccept(so, &sap); 502 if (error != 0) { 503 printf("%s: soaccept() error %d\n", __func__, error); 504 if (sap != NULL) 505 free(sap, M_SONAME); 506 goto out; 507 } 508 if (sap != NULL) 509 free(sap, M_SONAME); 510 softc->ha_so = so; 511 ctl_ha_sock_setup(softc); 512 return (0); 513 514out: 515 ctl_ha_lclose(softc); 516 return (error); 517} 518 519static int 520ctl_ha_listen(struct ha_softc *softc) 521{ 522 struct thread *td = curthread; 523 struct sockaddr_in sa; 524 struct sockopt opt; 525 int error, val; 526 527 /* Create the socket */ 528 if (softc->ha_lso == NULL) { 529 error = socreate(PF_INET, &softc->ha_lso, SOCK_STREAM, 530 IPPROTO_TCP, td->td_ucred, td); 531 if (error != 0) { 532 printf("%s: socreate() error %d\n", __func__, error); 533 return (error); 534 } 535 bzero(&opt, sizeof(struct sockopt)); 536 opt.sopt_dir = SOPT_SET; 537 opt.sopt_level = SOL_SOCKET; 538 opt.sopt_name = SO_REUSEADDR; 539 opt.sopt_val = &val; 540 opt.sopt_valsize = sizeof(val); 541 val = 1; 542 error = sosetopt(softc->ha_lso, &opt); 543 if (error) { 544 printf("%s: REUSEADDR setting failed %d\n", 545 __func__, error); 546 } 547 bzero(&opt, sizeof(struct sockopt)); 548 opt.sopt_dir = SOPT_SET; 549 opt.sopt_level = SOL_SOCKET; 550 opt.sopt_name = SO_REUSEPORT; 551 opt.sopt_val = &val; 552 opt.sopt_valsize = sizeof(val); 553 val = 1; 554 error = sosetopt(softc->ha_lso, &opt); 555 if (error) { 556 printf("%s: REUSEPORT setting failed %d\n", 557 __func__, error); 558 } 559 SOCKBUF_LOCK(&softc->ha_lso->so_rcv); 560 soupcall_set(softc->ha_lso, SO_RCV, ctl_ha_lupcall, softc); 561 SOCKBUF_UNLOCK(&softc->ha_lso->so_rcv); 562 } 563 564 memcpy(&sa, &softc->ha_peer_in, sizeof(sa)); 565 error = sobind(softc->ha_lso, (struct sockaddr *)&sa, td); 566 if (error != 0) { 567 printf("%s: sobind() error %d\n", __func__, error); 568 goto out; 569 } 570 error = solisten(softc->ha_lso, 1, td); 571 if (error != 0) { 572 printf("%s: solisten() error %d\n", __func__, error); 573 goto out; 574 } 575 return (0); 576 577out: 578 ctl_ha_lclose(softc); 579 return (error); 580} 581 582static void 583ctl_ha_conn_thread(void *arg) 584{ 585 struct ha_softc *softc = arg; 586 int error; 587 588 while (1) { 589 if (softc->ha_disconnect || softc->ha_shutdown) { 590 ctl_ha_close(softc); 591 if (softc->ha_disconnect == 2 || softc->ha_shutdown) 592 ctl_ha_lclose(softc); 593 softc->ha_disconnect = 0; 594 if (softc->ha_shutdown) 595 break; 596 } else if (softc->ha_so != NULL && 597 (softc->ha_so->so_error || 598 softc->ha_so->so_rcv.sb_state & SBS_CANTRCVMORE)) 599 ctl_ha_close(softc); 600 if (softc->ha_so == NULL) { 601 if (softc->ha_lso != NULL) 602 ctl_ha_accept(softc); 603 else if (softc->ha_listen) 604 ctl_ha_listen(softc); 605 else if (softc->ha_connect) 606 ctl_ha_connect(softc); 607 } 608 if (softc->ha_so != NULL) { 609 if (softc->ha_connected == 0 && 610 softc->ha_so->so_error == 0 && 611 (softc->ha_so->so_state & SS_ISCONNECTING) == 0) { 612 softc->ha_connected = 1; 613 ctl_ha_evt(softc, CTL_HA_CHAN_MAX, 614 CTL_HA_EVT_LINK_CHANGE, 615 CTL_HA_LINK_ONLINE); 616 softc->ha_receiving = 1; 617 error = kproc_kthread_add(ctl_ha_rx_thread, 618 softc, &softc->ha_ctl_softc->ctl_proc, 619 NULL, 0, 0, "ctl", "ha_rx"); 620 if (error != 0) { 621 printf("Error creating CTL HA rx thread!\n"); 622 softc->ha_receiving = 0; 623 softc->ha_disconnect = 1; 624 } 625 } 626 ctl_ha_send(softc); 627 } 628 mtx_lock(&softc->ha_lock); 629 if (softc->ha_so != NULL && 630 (softc->ha_so->so_error || 631 softc->ha_so->so_rcv.sb_state & SBS_CANTRCVMORE)) 632 ; 633 else if (!softc->ha_wakeup) 634 msleep(&softc->ha_wakeup, &softc->ha_lock, 0, "-", hz); 635 softc->ha_wakeup = 0; 636 mtx_unlock(&softc->ha_lock); 637 } 638 mtx_lock(&softc->ha_lock); 639 softc->ha_shutdown = 2; 640 wakeup(&softc->ha_wakeup); 641 mtx_unlock(&softc->ha_lock); 642 kthread_exit(); 643} 644 645static int 646ctl_ha_peer_sysctl(SYSCTL_HANDLER_ARGS) 647{ 648 struct ha_softc *softc = (struct ha_softc *)arg1; 649 struct sockaddr_in *sa; 650 int error, b1, b2, b3, b4, p, num; 651 char buf[128]; 652 653 strlcpy(buf, softc->ha_peer, sizeof(buf)); 654 error = sysctl_handle_string(oidp, buf, sizeof(buf), req); 655 if ((error != 0) || (req->newptr == NULL) || 656 strncmp(buf, softc->ha_peer, sizeof(buf)) == 0) 657 return (error); 658 659 sa = &softc->ha_peer_in; 660 mtx_lock(&softc->ha_lock); 661 if ((num = sscanf(buf, "connect %d.%d.%d.%d:%d", 662 &b1, &b2, &b3, &b4, &p)) >= 4) { 663 softc->ha_connect = 1; 664 softc->ha_listen = 0; 665 } else if ((num = sscanf(buf, "listen %d.%d.%d.%d:%d", 666 &b1, &b2, &b3, &b4, &p)) >= 4) { 667 softc->ha_connect = 0; 668 softc->ha_listen = 1; 669 } else { 670 softc->ha_connect = 0; 671 softc->ha_listen = 0; 672 if (buf[0] != 0) { 673 buf[0] = 0; 674 error = EINVAL; 675 } 676 } 677 strlcpy(softc->ha_peer, buf, sizeof(softc->ha_peer)); 678 if (softc->ha_connect || softc->ha_listen) { 679 memset(sa, 0, sizeof(*sa)); 680 sa->sin_len = sizeof(struct sockaddr_in); 681 sa->sin_family = AF_INET; 682 sa->sin_port = htons((num >= 5) ? p : 999); 683 sa->sin_addr.s_addr = 684 htonl((b1 << 24) + (b2 << 16) + (b3 << 8) + b4); 685 } 686 softc->ha_disconnect = 2; 687 softc->ha_wakeup = 1; 688 mtx_unlock(&softc->ha_lock); 689 wakeup(&softc->ha_wakeup); 690 return (error); 691} 692 693ctl_ha_status 694ctl_ha_msg_register(ctl_ha_channel channel, ctl_evt_handler handler) 695{ 696 struct ha_softc *softc = &ha_softc; 697 698 KASSERT(channel < CTL_HA_CHAN_MAX, 699 ("Wrong CTL HA channel %d", channel)); 700 softc->ha_handler[channel] = handler; 701 return (CTL_HA_STATUS_SUCCESS); 702} 703 704ctl_ha_status 705ctl_ha_msg_deregister(ctl_ha_channel channel) 706{ 707 struct ha_softc *softc = &ha_softc; 708 709 KASSERT(channel < CTL_HA_CHAN_MAX, 710 ("Wrong CTL HA channel %d", channel)); 711 softc->ha_handler[channel] = NULL; 712 return (CTL_HA_STATUS_SUCCESS); 713} 714 715/* 716 * Receive a message of the specified size. 717 */ 718ctl_ha_status 719ctl_ha_msg_recv(ctl_ha_channel channel, void *addr, size_t len, 720 int wait) 721{ 722 struct ha_softc *softc = &ha_softc; 723 struct uio uio; 724 struct iovec iov; 725 int error, flags; 726 727 if (!softc->ha_connected) 728 return (CTL_HA_STATUS_DISCONNECT); 729 730 iov.iov_base = addr; 731 iov.iov_len = len; 732 uio.uio_iov = &iov; 733 uio.uio_iovcnt = 1; 734 uio.uio_rw = UIO_READ; 735 uio.uio_segflg = UIO_SYSSPACE; 736 uio.uio_td = curthread; 737 uio.uio_resid = len; 738 flags = wait ? 0 : MSG_DONTWAIT; 739 error = soreceive(softc->ha_so, NULL, &uio, NULL, NULL, &flags); 740 if (error == 0) 741 return (CTL_HA_STATUS_SUCCESS); 742 743 /* Consider all errors fatal for HA sanity. */ 744 mtx_lock(&softc->ha_lock); 745 if (softc->ha_connected) { 746 softc->ha_disconnect = 1; 747 softc->ha_wakeup = 1; 748 wakeup(&softc->ha_wakeup); 749 } 750 mtx_unlock(&softc->ha_lock); 751 return (CTL_HA_STATUS_ERROR); 752} 753 754/* 755 * Send a message of the specified size. 756 */ 757ctl_ha_status 758ctl_ha_msg_send2(ctl_ha_channel channel, const void *addr, size_t len, 759 const void *addr2, size_t len2, int wait) 760{ 761 struct ha_softc *softc = &ha_softc; 762 struct mbuf *mb, *newmb; 763 struct ha_msg_wire hdr; 764 size_t copylen, off; 765 766 if (!softc->ha_connected) 767 return (CTL_HA_STATUS_DISCONNECT); 768 769 newmb = m_getm2(NULL, sizeof(hdr) + len + len2, wait, MT_DATA, 770 M_PKTHDR); 771 if (newmb == NULL) { 772 /* Consider all errors fatal for HA sanity. */ 773 mtx_lock(&softc->ha_lock); 774 if (softc->ha_connected) { 775 softc->ha_disconnect = 1; 776 softc->ha_wakeup = 1; 777 wakeup(&softc->ha_wakeup); 778 } 779 mtx_unlock(&softc->ha_lock); 780 printf("%s: Can't allocate mbuf chain\n", __func__); 781 return (CTL_HA_STATUS_ERROR); 782 } 783 hdr.channel = channel; 784 hdr.length = len + len2; 785 mb = newmb; 786 memcpy(mtodo(mb, 0), &hdr, sizeof(hdr)); 787 mb->m_len += sizeof(hdr); 788 off = 0; 789 for (; mb != NULL && off < len; mb = mb->m_next) { 790 copylen = min(M_TRAILINGSPACE(mb), len - off); 791 memcpy(mtodo(mb, mb->m_len), (const char *)addr + off, copylen); 792 mb->m_len += copylen; 793 off += copylen; 794 if (off == len) 795 break; 796 } 797 KASSERT(off == len, ("%s: off (%zu) != len (%zu)", __func__, 798 off, len)); 799 off = 0; 800 for (; mb != NULL && off < len2; mb = mb->m_next) { 801 copylen = min(M_TRAILINGSPACE(mb), len2 - off); 802 memcpy(mtodo(mb, mb->m_len), (const char *)addr2 + off, copylen); 803 mb->m_len += copylen; 804 off += copylen; 805 } 806 KASSERT(off == len2, ("%s: off (%zu) != len2 (%zu)", __func__, 807 off, len2)); 808 newmb->m_pkthdr.len = sizeof(hdr) + len + len2; 809 810 mtx_lock(&softc->ha_lock); 811 if (!softc->ha_connected) { 812 mtx_unlock(&softc->ha_lock); 813 m_freem(newmb); 814 return (CTL_HA_STATUS_DISCONNECT); 815 } 816 mbufq_enqueue(&softc->ha_sendq, newmb); 817 softc->ha_wakeup = 1; 818 mtx_unlock(&softc->ha_lock); 819 wakeup(&softc->ha_wakeup); 820 return (CTL_HA_STATUS_SUCCESS); 821} 822 823ctl_ha_status 824ctl_ha_msg_send(ctl_ha_channel channel, const void *addr, size_t len, 825 int wait) 826{ 827 828 return (ctl_ha_msg_send2(channel, addr, len, NULL, 0, wait)); 829} 830 831ctl_ha_status 832ctl_ha_msg_abort(ctl_ha_channel channel) 833{ 834 struct ha_softc *softc = &ha_softc; 835 836 mtx_lock(&softc->ha_lock); 837 softc->ha_disconnect = 1; 838 softc->ha_wakeup = 1; 839 mtx_unlock(&softc->ha_lock); 840 wakeup(&softc->ha_wakeup); 841 return (CTL_HA_STATUS_SUCCESS); 842} 843 844/* 845 * Allocate a data transfer request structure. 846 */ 847struct ctl_ha_dt_req * 848ctl_dt_req_alloc(void) 849{ 850 851 return (malloc(sizeof(struct ctl_ha_dt_req), M_CTL, M_WAITOK | M_ZERO)); 852} 853 854/* 855 * Free a data transfer request structure. 856 */ 857void 858ctl_dt_req_free(struct ctl_ha_dt_req *req) 859{ 860 861 free(req, M_CTL); 862} 863 864/* 865 * Issue a DMA request for a single buffer. 866 */ 867ctl_ha_status 868ctl_dt_single(struct ctl_ha_dt_req *req) 869{ 870 struct ha_softc *softc = &ha_softc; 871 struct ha_dt_msg_wire wire_dt; 872 ctl_ha_status status; 873 874 wire_dt.command = req->command; 875 wire_dt.size = req->size; 876 wire_dt.local = req->local; 877 wire_dt.remote = req->remote; 878 if (req->command == CTL_HA_DT_CMD_READ && req->callback != NULL) { 879 mtx_lock(&softc->ha_lock); 880 TAILQ_INSERT_TAIL(&softc->ha_dts, req, links); 881 mtx_unlock(&softc->ha_lock); 882 ctl_ha_msg_send(CTL_HA_CHAN_DATA, &wire_dt, sizeof(wire_dt), 883 M_WAITOK); 884 return (CTL_HA_STATUS_WAIT); 885 } 886 if (req->command == CTL_HA_DT_CMD_READ) { 887 status = ctl_ha_msg_send(CTL_HA_CHAN_DATA, &wire_dt, 888 sizeof(wire_dt), M_WAITOK); 889 } else { 890 status = ctl_ha_msg_send2(CTL_HA_CHAN_DATA, &wire_dt, 891 sizeof(wire_dt), req->local, req->size, M_WAITOK); 892 } 893 return (status); 894} 895 896static void 897ctl_dt_event_handler(ctl_ha_channel channel, ctl_ha_event event, int param) 898{ 899 struct ha_softc *softc = &ha_softc; 900 struct ctl_ha_dt_req *req; 901 ctl_ha_status isc_status; 902 903 if (event == CTL_HA_EVT_MSG_RECV) { 904 struct ha_dt_msg_wire wire_dt; 905 uint8_t *tmp; 906 int size; 907 908 size = min(sizeof(wire_dt), param); 909 isc_status = ctl_ha_msg_recv(CTL_HA_CHAN_DATA, &wire_dt, 910 size, M_WAITOK); 911 if (isc_status != CTL_HA_STATUS_SUCCESS) { 912 printf("%s: Error receiving message: %d\n", 913 __func__, isc_status); 914 return; 915 } 916 917 if (wire_dt.command == CTL_HA_DT_CMD_READ) { 918 wire_dt.command = CTL_HA_DT_CMD_WRITE; 919 tmp = wire_dt.local; 920 wire_dt.local = wire_dt.remote; 921 wire_dt.remote = tmp; 922 ctl_ha_msg_send2(CTL_HA_CHAN_DATA, &wire_dt, 923 sizeof(wire_dt), wire_dt.local, wire_dt.size, 924 M_WAITOK); 925 } else if (wire_dt.command == CTL_HA_DT_CMD_WRITE) { 926 isc_status = ctl_ha_msg_recv(CTL_HA_CHAN_DATA, 927 wire_dt.remote, wire_dt.size, M_WAITOK); 928 mtx_lock(&softc->ha_lock); 929 TAILQ_FOREACH(req, &softc->ha_dts, links) { 930 if (req->local == wire_dt.remote) { 931 TAILQ_REMOVE(&softc->ha_dts, req, links); 932 break; 933 } 934 } 935 mtx_unlock(&softc->ha_lock); 936 if (req) { 937 req->ret = isc_status; 938 req->callback(req); 939 } 940 } 941 } else if (event == CTL_HA_EVT_LINK_CHANGE) { 942 CTL_DEBUG_PRINT(("%s: Link state change to %d\n", __func__, 943 param)); 944 if (param != CTL_HA_LINK_ONLINE) { 945 mtx_lock(&softc->ha_lock); 946 while ((req = TAILQ_FIRST(&softc->ha_dts)) != NULL) { 947 TAILQ_REMOVE(&softc->ha_dts, req, links); 948 mtx_unlock(&softc->ha_lock); 949 req->ret = CTL_HA_STATUS_DISCONNECT; 950 req->callback(req); 951 mtx_lock(&softc->ha_lock); 952 } 953 mtx_unlock(&softc->ha_lock); 954 } 955 } else { 956 printf("%s: Unknown event %d\n", __func__, event); 957 } 958} 959 960 961ctl_ha_status 962ctl_ha_msg_init(struct ctl_softc *ctl_softc) 963{ 964 struct ha_softc *softc = &ha_softc; 965 int error; 966 967 softc->ha_ctl_softc = ctl_softc; 968 mtx_init(&softc->ha_lock, "CTL HA mutex", NULL, MTX_DEF); 969 mbufq_init(&softc->ha_sendq, INT_MAX); 970 TAILQ_INIT(&softc->ha_dts); 971 error = kproc_kthread_add(ctl_ha_conn_thread, softc, 972 &ctl_softc->ctl_proc, NULL, 0, 0, "ctl", "ha_tx"); 973 if (error != 0) { 974 printf("error creating CTL HA connection thread!\n"); 975 mtx_destroy(&softc->ha_lock); 976 return (CTL_HA_STATUS_ERROR); 977 } 978 softc->ha_shutdown_eh = EVENTHANDLER_REGISTER(shutdown_pre_sync, 979 ctl_ha_msg_shutdown, ctl_softc, SHUTDOWN_PRI_FIRST); 980 SYSCTL_ADD_PROC(&ctl_softc->sysctl_ctx, 981 SYSCTL_CHILDREN(ctl_softc->sysctl_tree), 982 OID_AUTO, "ha_peer", CTLTYPE_STRING | CTLFLAG_RWTUN, 983 softc, 0, ctl_ha_peer_sysctl, "A", "HA peer connection method"); 984 985 if (ctl_ha_msg_register(CTL_HA_CHAN_DATA, ctl_dt_event_handler) 986 != CTL_HA_STATUS_SUCCESS) { 987 printf("%s: ctl_ha_msg_register failed.\n", __func__); 988 } 989 990 return (CTL_HA_STATUS_SUCCESS); 991}; 992 993void 994ctl_ha_msg_shutdown(struct ctl_softc *ctl_softc) 995{ 996 struct ha_softc *softc = &ha_softc; 997 998 /* Disconnect and shutdown threads. */ 999 mtx_lock(&softc->ha_lock); 1000 if (softc->ha_shutdown < 2) { 1001 softc->ha_shutdown = 1; 1002 softc->ha_wakeup = 1; 1003 wakeup(&softc->ha_wakeup); 1004 while (softc->ha_shutdown < 2 && !SCHEDULER_STOPPED()) { 1005 msleep(&softc->ha_wakeup, &softc->ha_lock, 0, 1006 "shutdown", hz); 1007 } 1008 } 1009 mtx_unlock(&softc->ha_lock); 1010}; 1011 1012ctl_ha_status 1013ctl_ha_msg_destroy(struct ctl_softc *ctl_softc) 1014{ 1015 struct ha_softc *softc = &ha_softc; 1016 1017 if (softc->ha_shutdown_eh != NULL) { 1018 EVENTHANDLER_DEREGISTER(shutdown_pre_sync, 1019 softc->ha_shutdown_eh); 1020 softc->ha_shutdown_eh = NULL; 1021 } 1022 1023 ctl_ha_msg_shutdown(ctl_softc); /* Just in case. */ 1024 1025 if (ctl_ha_msg_deregister(CTL_HA_CHAN_DATA) != CTL_HA_STATUS_SUCCESS) 1026 printf("%s: ctl_ha_msg_deregister failed.\n", __func__); 1027 1028 mtx_destroy(&softc->ha_lock); 1029 return (CTL_HA_STATUS_SUCCESS); 1030}; 1031