ctl_ha.c revision 311400
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 311400 2017-01-05 11:16:15Z 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 && bootverbose) { 447 printf("%s: soconnect() error %d\n", __func__, error); 448 goto out; 449 } 450 return (0); 451 452out: 453 ctl_ha_close(softc); 454 return (error); 455} 456 457static int 458ctl_ha_accept(struct ha_softc *softc) 459{ 460 struct socket *so; 461 struct sockaddr *sap; 462 int error; 463 464 ACCEPT_LOCK(); 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; 470 ACCEPT_UNLOCK(); 471 printf("%s: socket error %d\n", __func__, error); 472 goto out; 473 } 474 so = TAILQ_FIRST(&softc->ha_lso->so_comp); 475 if (so == NULL) { 476 ACCEPT_UNLOCK(); 477 return (EWOULDBLOCK); 478 } 479 KASSERT(!(so->so_qstate & SQ_INCOMP), ("accept1: so SQ_INCOMP")); 480 KASSERT(so->so_qstate & SQ_COMP, ("accept1: so not SQ_COMP")); 481 482 /* 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. 486 */ 487 SOCK_LOCK(so); /* soref() and so_state update */ 488 soref(so); /* file descriptor reference */ 489 490 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; 494 so->so_head = NULL; 495 496 SOCK_UNLOCK(so); 497 ACCEPT_UNLOCK(); 498 499 sap = NULL; 500 error = soaccept(so, &sap); 501 if (error != 0) { 502 printf("%s: soaccept() error %d\n", __func__, error); 503 if (sap != NULL) 504 free(sap, M_SONAME); 505 goto out; 506 } 507 if (sap != NULL) 508 free(sap, M_SONAME); 509 softc->ha_so = so; 510 ctl_ha_sock_setup(softc); 511 return (0); 512 513out: 514 ctl_ha_lclose(softc); 515 return (error); 516} 517 518static int 519ctl_ha_listen(struct ha_softc *softc) 520{ 521 struct thread *td = curthread; 522 struct sockaddr_in sa; 523 struct sockopt opt; 524 int error, val; 525 526 /* 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); 530 if (error != 0) { 531 printf("%s: socreate() error %d\n", __func__, error); 532 return (error); 533 } 534 bzero(&opt, sizeof(struct sockopt)); 535 opt.sopt_dir = SOPT_SET; 536 opt.sopt_level = SOL_SOCKET; 537 opt.sopt_name = SO_REUSEADDR; 538 opt.sopt_val = &val; 539 opt.sopt_valsize = sizeof(val); 540 val = 1; 541 error = sosetopt(softc->ha_lso, &opt); 542 if (error) { 543 printf("%s: REUSEADDR setting failed %d\n", 544 __func__, error); 545 } 546 bzero(&opt, sizeof(struct sockopt)); 547 opt.sopt_dir = SOPT_SET; 548 opt.sopt_level = SOL_SOCKET; 549 opt.sopt_name = SO_REUSEPORT; 550 opt.sopt_val = &val; 551 opt.sopt_valsize = sizeof(val); 552 val = 1; 553 error = sosetopt(softc->ha_lso, &opt); 554 if (error) { 555 printf("%s: REUSEPORT setting failed %d\n", 556 __func__, error); 557 } 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); 561 } 562 563 memcpy(&sa, &softc->ha_peer_in, sizeof(sa)); 564 error = sobind(softc->ha_lso, (struct sockaddr *)&sa, td); 565 if (error != 0) { 566 printf("%s: sobind() error %d\n", __func__, error); 567 goto out; 568 } 569 error = solisten(softc->ha_lso, 1, td); 570 if (error != 0) { 571 printf("%s: solisten() error %d\n", __func__, error); 572 goto out; 573 } 574 return (0); 575 576out: 577 ctl_ha_lclose(softc); 578 return (error); 579} 580 581static void 582ctl_ha_conn_thread(void *arg) 583{ 584 struct ha_softc *softc = arg; 585 int error; 586 587 while (1) { 588 if (softc->ha_disconnect || softc->ha_shutdown) { 589 ctl_ha_close(softc); 590 if (softc->ha_disconnect == 2 || softc->ha_shutdown) 591 ctl_ha_lclose(softc); 592 softc->ha_disconnect = 0; 593 if (softc->ha_shutdown) 594 break; 595 } else if (softc->ha_so != NULL && 596 (softc->ha_so->so_error || 597 softc->ha_so->so_rcv.sb_state & SBS_CANTRCVMORE)) 598 ctl_ha_close(softc); 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); 606 } 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, 614 CTL_HA_LINK_ONLINE); 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"); 619 if (error != 0) { 620 printf("Error creating CTL HA rx thread!\n"); 621 softc->ha_receiving = 0; 622 softc->ha_disconnect = 1; 623 } 624 } 625 ctl_ha_send(softc); 626 } 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)) 631 ; 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); 636 } 637 mtx_lock(&softc->ha_lock); 638 softc->ha_shutdown = 2; 639 wakeup(&softc->ha_wakeup); 640 mtx_unlock(&softc->ha_lock); 641 kthread_exit(); 642} 643 644static int 645ctl_ha_peer_sysctl(SYSCTL_HANDLER_ARGS) 646{ 647 struct ha_softc *softc = (struct ha_softc *)arg1; 648 struct sockaddr_in *sa; 649 int error, b1, b2, b3, b4, p, num; 650 char buf[128]; 651 652 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) 656 return (error); 657 658 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; 668 } else { 669 softc->ha_connect = 0; 670 softc->ha_listen = 0; 671 if (buf[0] != 0) { 672 buf[0] = 0; 673 error = EINVAL; 674 } 675 } 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); 684 } 685 softc->ha_disconnect = 2; 686 softc->ha_wakeup = 1; 687 mtx_unlock(&softc->ha_lock); 688 wakeup(&softc->ha_wakeup); 689 return (error); 690} 691 692ctl_ha_status 693ctl_ha_msg_register(ctl_ha_channel channel, ctl_evt_handler handler) 694{ 695 struct ha_softc *softc = &ha_softc; 696 697 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); 701} 702 703ctl_ha_status 704ctl_ha_msg_deregister(ctl_ha_channel channel) 705{ 706 struct ha_softc *softc = &ha_softc; 707 708 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); 712} 713 714/* 715 * Receive a message of the specified size. 716 */ 717ctl_ha_status 718ctl_ha_msg_recv(ctl_ha_channel channel, void *addr, size_t len, 719 int wait) 720{ 721 struct ha_softc *softc = &ha_softc; 722 struct uio uio; 723 struct iovec iov; 724 int error, flags; 725 726 if (!softc->ha_connected) 727 return (CTL_HA_STATUS_DISCONNECT); 728 729 iov.iov_base = addr; 730 iov.iov_len = len; 731 uio.uio_iov = &iov; 732 uio.uio_iovcnt = 1; 733 uio.uio_rw = UIO_READ; 734 uio.uio_segflg = UIO_SYSSPACE; 735 uio.uio_td = curthread; 736 uio.uio_resid = len; 737 flags = wait ? 0 : MSG_DONTWAIT; 738 error = soreceive(softc->ha_so, NULL, &uio, NULL, NULL, &flags); 739 if (error == 0) 740 return (CTL_HA_STATUS_SUCCESS); 741 742 /* 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); 748 } 749 mtx_unlock(&softc->ha_lock); 750 return (CTL_HA_STATUS_ERROR); 751} 752 753/* 754 * Send a message of the specified size. 755 */ 756ctl_ha_status 757ctl_ha_msg_send2(ctl_ha_channel channel, const void *addr, size_t len, 758 const void *addr2, size_t len2, int wait) 759{ 760 struct ha_softc *softc = &ha_softc; 761 struct mbuf *mb, *newmb; 762 struct ha_msg_wire hdr; 763 size_t copylen, off; 764 765 if (!softc->ha_connected) 766 return (CTL_HA_STATUS_DISCONNECT); 767 768 newmb = m_getm2(NULL, sizeof(hdr) + len + len2, wait, MT_DATA, 769 M_PKTHDR); 770 if (newmb == NULL) { 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); 777 } 778 mtx_unlock(&softc->ha_lock); 779 printf("%s: Can't allocate mbuf chain\n", __func__); 780 return (CTL_HA_STATUS_ERROR); 781 } 782 hdr.channel = channel; 783 hdr.length = len + len2; 784 mb = newmb; 785 memcpy(mtodo(mb, 0), &hdr, sizeof(hdr)); 786 mb->m_len += sizeof(hdr); 787 off = 0; 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; 792 off += copylen; 793 if (off == len) 794 break; 795 } 796 KASSERT(off == len, ("%s: off (%zu) != len (%zu)", __func__, 797 off, len)); 798 off = 0; 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; 803 off += copylen; 804 } 805 KASSERT(off == len2, ("%s: off (%zu) != len2 (%zu)", __func__, 806 off, len2)); 807 newmb->m_pkthdr.len = sizeof(hdr) + len + len2; 808 809 mtx_lock(&softc->ha_lock); 810 if (!softc->ha_connected) { 811 mtx_unlock(&softc->ha_lock); 812 m_freem(newmb); 813 return (CTL_HA_STATUS_DISCONNECT); 814 } 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); 820} 821 822ctl_ha_status 823ctl_ha_msg_send(ctl_ha_channel channel, const void *addr, size_t len, 824 int wait) 825{ 826 827 return (ctl_ha_msg_send2(channel, addr, len, NULL, 0, wait)); 828} 829 830ctl_ha_status 831ctl_ha_msg_abort(ctl_ha_channel channel) 832{ 833 struct ha_softc *softc = &ha_softc; 834 835 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); 841} 842 843/* 844 * Allocate a data transfer request structure. 845 */ 846struct ctl_ha_dt_req * 847ctl_dt_req_alloc(void) 848{ 849 850 return (malloc(sizeof(struct ctl_ha_dt_req), M_CTL, M_WAITOK | M_ZERO)); 851} 852 853/* 854 * Free a data transfer request structure. 855 */ 856void 857ctl_dt_req_free(struct ctl_ha_dt_req *req) 858{ 859 860 free(req, M_CTL); 861} 862 863/* 864 * Issue a DMA request for a single buffer. 865 */ 866ctl_ha_status 867ctl_dt_single(struct ctl_ha_dt_req *req) 868{ 869 struct ha_softc *softc = &ha_softc; 870 struct ha_dt_msg_wire wire_dt; 871 ctl_ha_status status; 872 873 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), 882 M_WAITOK); 883 return (CTL_HA_STATUS_WAIT); 884 } 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); 888 } else { 889 status = ctl_ha_msg_send2(CTL_HA_CHAN_DATA, &wire_dt, 890 sizeof(wire_dt), req->local, req->size, M_WAITOK); 891 } 892 return (status); 893} 894 895static void 896ctl_dt_event_handler(ctl_ha_channel channel, ctl_ha_event event, int param) 897{ 898 struct ha_softc *softc = &ha_softc; 899 struct ctl_ha_dt_req *req; 900 ctl_ha_status isc_status; 901 902 if (event == CTL_HA_EVT_MSG_RECV) { 903 struct ha_dt_msg_wire wire_dt; 904 uint8_t *tmp; 905 int size; 906 907 size = min(sizeof(wire_dt), param); 908 isc_status = ctl_ha_msg_recv(CTL_HA_CHAN_DATA, &wire_dt, 909 size, M_WAITOK); 910 if (isc_status != CTL_HA_STATUS_SUCCESS) { 911 printf("%s: Error receiving message: %d\n", 912 __func__, isc_status); 913 return; 914 } 915 916 if (wire_dt.command == CTL_HA_DT_CMD_READ) { 917 wire_dt.command = CTL_HA_DT_CMD_WRITE; 918 tmp = wire_dt.local; 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, 923 M_WAITOK); 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); 931 break; 932 } 933 } 934 mtx_unlock(&softc->ha_lock); 935 if (req) { 936 req->ret = isc_status; 937 req->callback(req); 938 } 939 } 940 } else if (event == CTL_HA_EVT_LINK_CHANGE) { 941 CTL_DEBUG_PRINT(("%s: Link state change to %d\n", __func__, 942 param)); 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; 949 req->callback(req); 950 mtx_lock(&softc->ha_lock); 951 } 952 mtx_unlock(&softc->ha_lock); 953 } 954 } else { 955 printf("%s: Unknown event %d\n", __func__, event); 956 } 957} 958 959 960ctl_ha_status 961ctl_ha_msg_init(struct ctl_softc *ctl_softc) 962{ 963 struct ha_softc *softc = &ha_softc; 964 int error; 965 966 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"); 972 if (error != 0) { 973 printf("error creating CTL HA connection thread!\n"); 974 mtx_destroy(&softc->ha_lock); 975 return (CTL_HA_STATUS_ERROR); 976 } 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"); 983 984 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__); 987 } 988 989 return (CTL_HA_STATUS_SUCCESS); 990}; 991 992void 993ctl_ha_msg_shutdown(struct ctl_softc *ctl_softc) 994{ 995 struct ha_softc *softc = &ha_softc; 996 997 /* 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, 1005 "shutdown", hz); 1006 } 1007 } 1008 mtx_unlock(&softc->ha_lock); 1009}; 1010 1011ctl_ha_status 1012ctl_ha_msg_destroy(struct ctl_softc *ctl_softc) 1013{ 1014 struct ha_softc *softc = &ha_softc; 1015 1016 if (softc->ha_shutdown_eh != NULL) { 1017 EVENTHANDLER_DEREGISTER(shutdown_pre_sync, 1018 softc->ha_shutdown_eh); 1019 softc->ha_shutdown_eh = NULL; 1020 } 1021 1022 ctl_ha_msg_shutdown(ctl_softc); /* Just in case. */ 1023 1024 if (ctl_ha_msg_deregister(CTL_HA_CHAN_DATA) != CTL_HA_STATUS_SUCCESS) 1025 printf("%s: ctl_ha_msg_deregister failed.\n", __func__); 1026 1027 mtx_destroy(&softc->ha_lock); 1028 return (CTL_HA_STATUS_SUCCESS); 1029}; 1030