1/*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2015 Alexander Motin <mav@FreeBSD.org> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer, 12 * without modification, immediately at the beginning of the file. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29#include <sys/param.h> 30#include <sys/condvar.h> 31#include <sys/conf.h> 32#include <sys/eventhandler.h> 33#include <sys/kernel.h> 34#include <sys/kthread.h> 35#include <sys/limits.h> 36#include <sys/lock.h> 37#include <sys/malloc.h> 38#include <sys/mbuf.h> 39#include <sys/module.h> 40#include <sys/mutex.h> 41#include <sys/proc.h> 42#include <sys/queue.h> 43#include <sys/socket.h> 44#include <sys/socketvar.h> 45#include <sys/sysctl.h> 46#include <sys/systm.h> 47#include <sys/uio.h> 48#include <netinet/in.h> 49#include <netinet/tcp.h> 50#include <vm/uma.h> 51 52#include <cam/cam.h> 53#include <cam/scsi/scsi_all.h> 54#include <cam/scsi/scsi_da.h> 55#include <cam/ctl/ctl_io.h> 56#include <cam/ctl/ctl.h> 57#include <cam/ctl/ctl_frontend.h> 58#include <cam/ctl/ctl_util.h> 59#include <cam/ctl/ctl_backend.h> 60#include <cam/ctl/ctl_ioctl.h> 61#include <cam/ctl/ctl_ha.h> 62#include <cam/ctl/ctl_private.h> 63#include <cam/ctl/ctl_debug.h> 64#include <cam/ctl/ctl_error.h> 65 66struct ha_msg_wire { 67 uint32_t channel; 68 uint32_t length; 69}; 70 71struct ha_dt_msg_wire { 72 ctl_ha_dt_cmd command; 73 uint32_t size; 74 uint8_t *local; 75 uint8_t *remote; 76}; 77 78struct ha_softc { 79 struct ctl_softc *ha_ctl_softc; 80 ctl_evt_handler ha_handler[CTL_HA_CHAN_MAX]; 81 char ha_peer[128]; 82 struct sockaddr_in ha_peer_in; 83 struct socket *ha_lso; 84 struct socket *ha_so; 85 struct mbufq ha_sendq; 86 struct mbuf *ha_sending; 87 struct mtx ha_lock; 88 int ha_connect; 89 int ha_listen; 90 int ha_connected; 91 int ha_receiving; 92 int ha_wakeup; 93 int ha_disconnect; 94 int ha_shutdown; 95 eventhandler_tag ha_shutdown_eh; 96 TAILQ_HEAD(, ctl_ha_dt_req) ha_dts; 97} ha_softc; 98 99static void 100ctl_ha_conn_wake(struct ha_softc *softc) 101{ 102 103 mtx_lock(&softc->ha_lock); 104 softc->ha_wakeup = 1; 105 mtx_unlock(&softc->ha_lock); 106 wakeup(&softc->ha_wakeup); 107} 108 109static int 110ctl_ha_lupcall(struct socket *so, void *arg, int waitflag) 111{ 112 struct ha_softc *softc = arg; 113 114 ctl_ha_conn_wake(softc); 115 return (SU_OK); 116} 117 118static int 119ctl_ha_rupcall(struct socket *so, void *arg, int waitflag) 120{ 121 struct ha_softc *softc = arg; 122 123 wakeup(&softc->ha_receiving); 124 return (SU_OK); 125} 126 127static int 128ctl_ha_supcall(struct socket *so, void *arg, int waitflag) 129{ 130 struct ha_softc *softc = arg; 131 132 ctl_ha_conn_wake(softc); 133 return (SU_OK); 134} 135 136static void 137ctl_ha_evt(struct ha_softc *softc, ctl_ha_channel ch, ctl_ha_event evt, 138 int param) 139{ 140 int i; 141 142 if (ch < CTL_HA_CHAN_MAX) { 143 if (softc->ha_handler[ch]) 144 softc->ha_handler[ch](ch, evt, param); 145 return; 146 } 147 for (i = 0; i < CTL_HA_CHAN_MAX; i++) { 148 if (softc->ha_handler[i]) 149 softc->ha_handler[i](i, evt, param); 150 } 151} 152 153static void 154ctl_ha_close(struct ha_softc *softc) 155{ 156 struct socket *so = softc->ha_so; 157 int report = 0; 158 159 if (softc->ha_connected || softc->ha_disconnect) { 160 softc->ha_connected = 0; 161 mbufq_drain(&softc->ha_sendq); 162 m_freem(softc->ha_sending); 163 softc->ha_sending = NULL; 164 report = 1; 165 } 166 if (so) { 167 SOCK_RECVBUF_LOCK(so); 168 soupcall_clear(so, SO_RCV); 169 while (softc->ha_receiving) { 170 wakeup(&softc->ha_receiving); 171 msleep(&softc->ha_receiving, SOCK_RECVBUF_MTX(so), 172 0, "ha_rx exit", 0); 173 } 174 SOCK_RECVBUF_UNLOCK(so); 175 SOCK_SENDBUF_LOCK(so); 176 soupcall_clear(so, SO_SND); 177 SOCK_SENDBUF_UNLOCK(so); 178 softc->ha_so = NULL; 179 if (softc->ha_connect) 180 pause("reconnect", hz / 2); 181 soclose(so); 182 } 183 if (report) { 184 ctl_ha_evt(softc, CTL_HA_CHAN_MAX, CTL_HA_EVT_LINK_CHANGE, 185 (softc->ha_connect || softc->ha_listen) ? 186 CTL_HA_LINK_UNKNOWN : CTL_HA_LINK_OFFLINE); 187 } 188} 189 190static void 191ctl_ha_lclose(struct ha_softc *softc) 192{ 193 194 if (softc->ha_lso) { 195 if (SOLISTENING(softc->ha_lso)) { 196 SOLISTEN_LOCK(softc->ha_lso); 197 solisten_upcall_set(softc->ha_lso, NULL, NULL); 198 SOLISTEN_UNLOCK(softc->ha_lso); 199 } 200 soclose(softc->ha_lso); 201 softc->ha_lso = NULL; 202 } 203} 204 205static void 206ctl_ha_rx_thread(void *arg) 207{ 208 struct ha_softc *softc = arg; 209 struct socket *so = softc->ha_so; 210 struct ha_msg_wire wire_hdr; 211 struct uio uio; 212 struct iovec iov; 213 int error, flags, next; 214 215 bzero(&wire_hdr, sizeof(wire_hdr)); 216 while (1) { 217 if (wire_hdr.length > 0) 218 next = wire_hdr.length; 219 else 220 next = sizeof(wire_hdr); 221 SOCK_RECVBUF_LOCK(so); 222 while (sbavail(&so->so_rcv) < next || softc->ha_disconnect) { 223 if (softc->ha_connected == 0 || softc->ha_disconnect || 224 so->so_error || 225 (so->so_rcv.sb_state & SBS_CANTRCVMORE)) { 226 goto errout; 227 } 228 so->so_rcv.sb_lowat = next; 229 msleep(&softc->ha_receiving, SOCK_RECVBUF_MTX(so), 230 0, "-", 0); 231 } 232 SOCK_RECVBUF_UNLOCK(so); 233 234 if (wire_hdr.length == 0) { 235 iov.iov_base = &wire_hdr; 236 iov.iov_len = sizeof(wire_hdr); 237 uio.uio_iov = &iov; 238 uio.uio_iovcnt = 1; 239 uio.uio_rw = UIO_READ; 240 uio.uio_segflg = UIO_SYSSPACE; 241 uio.uio_td = curthread; 242 uio.uio_resid = sizeof(wire_hdr); 243 flags = MSG_DONTWAIT; 244 error = soreceive(softc->ha_so, NULL, &uio, NULL, 245 NULL, &flags); 246 if (error != 0) { 247 printf("%s: header receive error %d\n", 248 __func__, error); 249 SOCK_RECVBUF_LOCK(so); 250 goto errout; 251 } 252 } else { 253 ctl_ha_evt(softc, wire_hdr.channel, 254 CTL_HA_EVT_MSG_RECV, wire_hdr.length); 255 wire_hdr.length = 0; 256 } 257 } 258 259errout: 260 softc->ha_receiving = 0; 261 wakeup(&softc->ha_receiving); 262 SOCK_RECVBUF_UNLOCK(so); 263 ctl_ha_conn_wake(softc); 264 kthread_exit(); 265} 266 267static void 268ctl_ha_send(struct ha_softc *softc) 269{ 270 struct socket *so = softc->ha_so; 271 int error; 272 273 while (1) { 274 if (softc->ha_sending == NULL) { 275 mtx_lock(&softc->ha_lock); 276 softc->ha_sending = mbufq_dequeue(&softc->ha_sendq); 277 mtx_unlock(&softc->ha_lock); 278 if (softc->ha_sending == NULL) { 279 so->so_snd.sb_lowat = so->so_snd.sb_hiwat + 1; 280 break; 281 } 282 } 283 SOCK_SENDBUF_LOCK(so); 284 if (sbspace(&so->so_snd) < softc->ha_sending->m_pkthdr.len) { 285 so->so_snd.sb_lowat = softc->ha_sending->m_pkthdr.len; 286 SOCK_SENDBUF_UNLOCK(so); 287 break; 288 } 289 SOCK_SENDBUF_UNLOCK(so); 290 error = sosend(softc->ha_so, NULL, NULL, softc->ha_sending, 291 NULL, MSG_DONTWAIT, curthread); 292 softc->ha_sending = NULL; 293 if (error != 0) { 294 printf("%s: sosend() error %d\n", __func__, error); 295 return; 296 } 297 } 298} 299 300static void 301ctl_ha_sock_setup(struct ha_softc *softc) 302{ 303 struct sockopt opt; 304 struct socket *so = softc->ha_so; 305 int error, val; 306 307 val = 1024 * 1024; 308 error = soreserve(so, val, val); 309 if (error) 310 printf("%s: soreserve failed %d\n", __func__, error); 311 312 SOCK_RECVBUF_LOCK(so); 313 so->so_rcv.sb_lowat = sizeof(struct ha_msg_wire); 314 soupcall_set(so, SO_RCV, ctl_ha_rupcall, softc); 315 SOCK_RECVBUF_UNLOCK(so); 316 SOCK_SENDBUF_LOCK(so); 317 so->so_snd.sb_lowat = sizeof(struct ha_msg_wire); 318 soupcall_set(so, SO_SND, ctl_ha_supcall, softc); 319 SOCK_SENDBUF_UNLOCK(so); 320 321 bzero(&opt, sizeof(struct sockopt)); 322 opt.sopt_dir = SOPT_SET; 323 opt.sopt_level = SOL_SOCKET; 324 opt.sopt_name = SO_KEEPALIVE; 325 opt.sopt_val = &val; 326 opt.sopt_valsize = sizeof(val); 327 val = 1; 328 error = sosetopt(so, &opt); 329 if (error) 330 printf("%s: KEEPALIVE setting failed %d\n", __func__, error); 331 332 opt.sopt_level = IPPROTO_TCP; 333 opt.sopt_name = TCP_NODELAY; 334 val = 1; 335 error = sosetopt(so, &opt); 336 if (error) 337 printf("%s: NODELAY setting failed %d\n", __func__, error); 338 339 opt.sopt_name = TCP_KEEPINIT; 340 val = 3; 341 error = sosetopt(so, &opt); 342 if (error) 343 printf("%s: KEEPINIT setting failed %d\n", __func__, error); 344 345 opt.sopt_name = TCP_KEEPIDLE; 346 val = 1; 347 error = sosetopt(so, &opt); 348 if (error) 349 printf("%s: KEEPIDLE setting failed %d\n", __func__, error); 350 351 opt.sopt_name = TCP_KEEPINTVL; 352 val = 1; 353 error = sosetopt(so, &opt); 354 if (error) 355 printf("%s: KEEPINTVL setting failed %d\n", __func__, error); 356 357 opt.sopt_name = TCP_KEEPCNT; 358 val = 5; 359 error = sosetopt(so, &opt); 360 if (error) 361 printf("%s: KEEPCNT setting failed %d\n", __func__, error); 362} 363 364static int 365ctl_ha_connect(struct ha_softc *softc) 366{ 367 struct thread *td = curthread; 368 struct sockaddr_in sa; 369 struct socket *so; 370 int error; 371 372 /* Create the socket */ 373 error = socreate(PF_INET, &so, SOCK_STREAM, 374 IPPROTO_TCP, td->td_ucred, td); 375 if (error != 0) { 376 printf("%s: socreate() error %d\n", __func__, error); 377 return (error); 378 } 379 softc->ha_so = so; 380 ctl_ha_sock_setup(softc); 381 382 memcpy(&sa, &softc->ha_peer_in, sizeof(sa)); 383 error = soconnect(so, (struct sockaddr *)&sa, td); 384 if (error != 0) { 385 if (bootverbose) 386 printf("%s: soconnect() error %d\n", __func__, error); 387 goto out; 388 } 389 return (0); 390 391out: 392 ctl_ha_close(softc); 393 return (error); 394} 395 396static int 397ctl_ha_accept(struct ha_softc *softc) 398{ 399 struct socket *lso, *so; 400 struct sockaddr_in sin = { .sin_len = sizeof(sin) }; 401 int error; 402 403 lso = softc->ha_lso; 404 SOLISTEN_LOCK(lso); 405 error = solisten_dequeue(lso, &so, 0); 406 if (error == EWOULDBLOCK) 407 return (error); 408 if (error) { 409 printf("%s: socket error %d\n", __func__, error); 410 goto out; 411 } 412 413 error = soaccept(so, (struct sockaddr *)&sin); 414 if (error != 0) { 415 printf("%s: soaccept() error %d\n", __func__, error); 416 goto out; 417 } 418 softc->ha_so = so; 419 ctl_ha_sock_setup(softc); 420 return (0); 421 422out: 423 ctl_ha_lclose(softc); 424 return (error); 425} 426 427static int 428ctl_ha_listen(struct ha_softc *softc) 429{ 430 struct thread *td = curthread; 431 struct sockaddr_in sa; 432 struct sockopt opt; 433 int error, val; 434 435 /* Create the socket */ 436 if (softc->ha_lso == NULL) { 437 error = socreate(PF_INET, &softc->ha_lso, SOCK_STREAM, 438 IPPROTO_TCP, td->td_ucred, td); 439 if (error != 0) { 440 printf("%s: socreate() error %d\n", __func__, error); 441 return (error); 442 } 443 bzero(&opt, sizeof(struct sockopt)); 444 opt.sopt_dir = SOPT_SET; 445 opt.sopt_level = SOL_SOCKET; 446 opt.sopt_name = SO_REUSEADDR; 447 opt.sopt_val = &val; 448 opt.sopt_valsize = sizeof(val); 449 val = 1; 450 error = sosetopt(softc->ha_lso, &opt); 451 if (error) { 452 printf("%s: REUSEADDR setting failed %d\n", 453 __func__, error); 454 } 455 bzero(&opt, sizeof(struct sockopt)); 456 opt.sopt_dir = SOPT_SET; 457 opt.sopt_level = SOL_SOCKET; 458 opt.sopt_name = SO_REUSEPORT; 459 opt.sopt_val = &val; 460 opt.sopt_valsize = sizeof(val); 461 val = 1; 462 error = sosetopt(softc->ha_lso, &opt); 463 if (error) { 464 printf("%s: REUSEPORT setting failed %d\n", 465 __func__, error); 466 } 467 } 468 469 memcpy(&sa, &softc->ha_peer_in, sizeof(sa)); 470 error = sobind(softc->ha_lso, (struct sockaddr *)&sa, td); 471 if (error != 0) { 472 printf("%s: sobind() error %d\n", __func__, error); 473 goto out; 474 } 475 error = solisten(softc->ha_lso, 1, td); 476 if (error != 0) { 477 printf("%s: solisten() error %d\n", __func__, error); 478 goto out; 479 } 480 SOLISTEN_LOCK(softc->ha_lso); 481 softc->ha_lso->so_state |= SS_NBIO; 482 solisten_upcall_set(softc->ha_lso, ctl_ha_lupcall, softc); 483 SOLISTEN_UNLOCK(softc->ha_lso); 484 return (0); 485 486out: 487 ctl_ha_lclose(softc); 488 return (error); 489} 490 491static void 492ctl_ha_conn_thread(void *arg) 493{ 494 struct ha_softc *softc = arg; 495 int error; 496 497 while (1) { 498 if (softc->ha_disconnect || softc->ha_shutdown) { 499 ctl_ha_close(softc); 500 if (softc->ha_disconnect == 2 || softc->ha_shutdown) 501 ctl_ha_lclose(softc); 502 softc->ha_disconnect = 0; 503 if (softc->ha_shutdown) 504 break; 505 } else if (softc->ha_so != NULL && 506 (softc->ha_so->so_error || 507 softc->ha_so->so_rcv.sb_state & SBS_CANTRCVMORE)) 508 ctl_ha_close(softc); 509 if (softc->ha_so == NULL) { 510 if (softc->ha_lso != NULL) 511 ctl_ha_accept(softc); 512 else if (softc->ha_listen) 513 ctl_ha_listen(softc); 514 else if (softc->ha_connect) 515 ctl_ha_connect(softc); 516 } 517 if (softc->ha_so != NULL) { 518 if (softc->ha_connected == 0 && 519 softc->ha_so->so_error == 0 && 520 (softc->ha_so->so_state & SS_ISCONNECTING) == 0) { 521 softc->ha_connected = 1; 522 ctl_ha_evt(softc, CTL_HA_CHAN_MAX, 523 CTL_HA_EVT_LINK_CHANGE, 524 CTL_HA_LINK_ONLINE); 525 softc->ha_receiving = 1; 526 error = kproc_kthread_add(ctl_ha_rx_thread, 527 softc, &softc->ha_ctl_softc->ctl_proc, 528 NULL, 0, 0, "ctl", "ha_rx"); 529 if (error != 0) { 530 printf("Error creating CTL HA rx thread!\n"); 531 softc->ha_receiving = 0; 532 softc->ha_disconnect = 1; 533 } 534 } 535 ctl_ha_send(softc); 536 } 537 mtx_lock(&softc->ha_lock); 538 if (softc->ha_so != NULL && 539 (softc->ha_so->so_error || 540 softc->ha_so->so_rcv.sb_state & SBS_CANTRCVMORE)) 541 ; 542 else if (!softc->ha_wakeup) 543 msleep(&softc->ha_wakeup, &softc->ha_lock, 0, "-", hz); 544 softc->ha_wakeup = 0; 545 mtx_unlock(&softc->ha_lock); 546 } 547 mtx_lock(&softc->ha_lock); 548 softc->ha_shutdown = 2; 549 wakeup(&softc->ha_wakeup); 550 mtx_unlock(&softc->ha_lock); 551 kthread_exit(); 552} 553 554static int 555ctl_ha_peer_sysctl(SYSCTL_HANDLER_ARGS) 556{ 557 struct ha_softc *softc = (struct ha_softc *)arg1; 558 struct sockaddr_in *sa; 559 int error, b1, b2, b3, b4, p, num; 560 char buf[128]; 561 562 strlcpy(buf, softc->ha_peer, sizeof(buf)); 563 error = sysctl_handle_string(oidp, buf, sizeof(buf), req); 564 if ((error != 0) || (req->newptr == NULL) || 565 strncmp(buf, softc->ha_peer, sizeof(buf)) == 0) 566 return (error); 567 568 sa = &softc->ha_peer_in; 569 mtx_lock(&softc->ha_lock); 570 if ((num = sscanf(buf, "connect %d.%d.%d.%d:%d", 571 &b1, &b2, &b3, &b4, &p)) >= 4) { 572 softc->ha_connect = 1; 573 softc->ha_listen = 0; 574 } else if ((num = sscanf(buf, "listen %d.%d.%d.%d:%d", 575 &b1, &b2, &b3, &b4, &p)) >= 4) { 576 softc->ha_connect = 0; 577 softc->ha_listen = 1; 578 } else { 579 softc->ha_connect = 0; 580 softc->ha_listen = 0; 581 if (buf[0] != 0) { 582 buf[0] = 0; 583 error = EINVAL; 584 } 585 } 586 strlcpy(softc->ha_peer, buf, sizeof(softc->ha_peer)); 587 if (softc->ha_connect || softc->ha_listen) { 588 memset(sa, 0, sizeof(*sa)); 589 sa->sin_len = sizeof(struct sockaddr_in); 590 sa->sin_family = AF_INET; 591 sa->sin_port = htons((num >= 5) ? p : 999); 592 sa->sin_addr.s_addr = 593 htonl((b1 << 24) + (b2 << 16) + (b3 << 8) + b4); 594 } 595 softc->ha_disconnect = 2; 596 softc->ha_wakeup = 1; 597 mtx_unlock(&softc->ha_lock); 598 wakeup(&softc->ha_wakeup); 599 return (error); 600} 601 602ctl_ha_status 603ctl_ha_msg_register(ctl_ha_channel channel, ctl_evt_handler handler) 604{ 605 struct ha_softc *softc = &ha_softc; 606 607 KASSERT(channel < CTL_HA_CHAN_MAX, 608 ("Wrong CTL HA channel %d", channel)); 609 softc->ha_handler[channel] = handler; 610 return (CTL_HA_STATUS_SUCCESS); 611} 612 613ctl_ha_status 614ctl_ha_msg_deregister(ctl_ha_channel channel) 615{ 616 struct ha_softc *softc = &ha_softc; 617 618 KASSERT(channel < CTL_HA_CHAN_MAX, 619 ("Wrong CTL HA channel %d", channel)); 620 softc->ha_handler[channel] = NULL; 621 return (CTL_HA_STATUS_SUCCESS); 622} 623 624/* 625 * Receive a message of the specified size. 626 */ 627ctl_ha_status 628ctl_ha_msg_recv(ctl_ha_channel channel, void *addr, size_t len, 629 int wait) 630{ 631 struct ha_softc *softc = &ha_softc; 632 struct uio uio; 633 struct iovec iov; 634 int error, flags; 635 636 if (!softc->ha_connected) 637 return (CTL_HA_STATUS_DISCONNECT); 638 639 iov.iov_base = addr; 640 iov.iov_len = len; 641 uio.uio_iov = &iov; 642 uio.uio_iovcnt = 1; 643 uio.uio_rw = UIO_READ; 644 uio.uio_segflg = UIO_SYSSPACE; 645 uio.uio_td = curthread; 646 uio.uio_resid = len; 647 flags = wait ? 0 : MSG_DONTWAIT; 648 error = soreceive(softc->ha_so, NULL, &uio, NULL, NULL, &flags); 649 if (error == 0) 650 return (CTL_HA_STATUS_SUCCESS); 651 652 /* Consider all errors fatal for HA sanity. */ 653 mtx_lock(&softc->ha_lock); 654 if (softc->ha_connected) { 655 softc->ha_disconnect = 1; 656 softc->ha_wakeup = 1; 657 wakeup(&softc->ha_wakeup); 658 } 659 mtx_unlock(&softc->ha_lock); 660 return (CTL_HA_STATUS_ERROR); 661} 662 663/* 664 * Send a message of the specified size. 665 */ 666ctl_ha_status 667ctl_ha_msg_send2(ctl_ha_channel channel, const void *addr, size_t len, 668 const void *addr2, size_t len2, int wait) 669{ 670 struct ha_softc *softc = &ha_softc; 671 struct mbuf *mb, *newmb; 672 struct ha_msg_wire hdr; 673 size_t copylen, off; 674 675 if (!softc->ha_connected) 676 return (CTL_HA_STATUS_DISCONNECT); 677 678 newmb = m_getm2(NULL, sizeof(hdr) + len + len2, wait, MT_DATA, 679 M_PKTHDR); 680 if (newmb == NULL) { 681 /* Consider all errors fatal for HA sanity. */ 682 mtx_lock(&softc->ha_lock); 683 if (softc->ha_connected) { 684 softc->ha_disconnect = 1; 685 softc->ha_wakeup = 1; 686 wakeup(&softc->ha_wakeup); 687 } 688 mtx_unlock(&softc->ha_lock); 689 printf("%s: Can't allocate mbuf chain\n", __func__); 690 return (CTL_HA_STATUS_ERROR); 691 } 692 hdr.channel = channel; 693 hdr.length = len + len2; 694 mb = newmb; 695 memcpy(mtodo(mb, 0), &hdr, sizeof(hdr)); 696 mb->m_len += sizeof(hdr); 697 off = 0; 698 for (; mb != NULL && off < len; mb = mb->m_next) { 699 copylen = min(M_TRAILINGSPACE(mb), len - off); 700 memcpy(mtodo(mb, mb->m_len), (const char *)addr + off, copylen); 701 mb->m_len += copylen; 702 off += copylen; 703 if (off == len) 704 break; 705 } 706 KASSERT(off == len, ("%s: off (%zu) != len (%zu)", __func__, 707 off, len)); 708 off = 0; 709 for (; mb != NULL && off < len2; mb = mb->m_next) { 710 copylen = min(M_TRAILINGSPACE(mb), len2 - off); 711 memcpy(mtodo(mb, mb->m_len), (const char *)addr2 + off, copylen); 712 mb->m_len += copylen; 713 off += copylen; 714 } 715 KASSERT(off == len2, ("%s: off (%zu) != len2 (%zu)", __func__, 716 off, len2)); 717 newmb->m_pkthdr.len = sizeof(hdr) + len + len2; 718 719 mtx_lock(&softc->ha_lock); 720 if (!softc->ha_connected) { 721 mtx_unlock(&softc->ha_lock); 722 m_freem(newmb); 723 return (CTL_HA_STATUS_DISCONNECT); 724 } 725 mbufq_enqueue(&softc->ha_sendq, newmb); 726 softc->ha_wakeup = 1; 727 mtx_unlock(&softc->ha_lock); 728 wakeup(&softc->ha_wakeup); 729 return (CTL_HA_STATUS_SUCCESS); 730} 731 732ctl_ha_status 733ctl_ha_msg_send(ctl_ha_channel channel, const void *addr, size_t len, 734 int wait) 735{ 736 737 return (ctl_ha_msg_send2(channel, addr, len, NULL, 0, wait)); 738} 739 740ctl_ha_status 741ctl_ha_msg_abort(ctl_ha_channel channel) 742{ 743 struct ha_softc *softc = &ha_softc; 744 745 mtx_lock(&softc->ha_lock); 746 softc->ha_disconnect = 1; 747 softc->ha_wakeup = 1; 748 mtx_unlock(&softc->ha_lock); 749 wakeup(&softc->ha_wakeup); 750 return (CTL_HA_STATUS_SUCCESS); 751} 752 753/* 754 * Allocate a data transfer request structure. 755 */ 756struct ctl_ha_dt_req * 757ctl_dt_req_alloc(void) 758{ 759 760 return (malloc(sizeof(struct ctl_ha_dt_req), M_CTL, M_WAITOK | M_ZERO)); 761} 762 763/* 764 * Free a data transfer request structure. 765 */ 766void 767ctl_dt_req_free(struct ctl_ha_dt_req *req) 768{ 769 770 free(req, M_CTL); 771} 772 773/* 774 * Issue a DMA request for a single buffer. 775 */ 776ctl_ha_status 777ctl_dt_single(struct ctl_ha_dt_req *req) 778{ 779 struct ha_softc *softc = &ha_softc; 780 struct ha_dt_msg_wire wire_dt; 781 ctl_ha_status status; 782 783 wire_dt.command = req->command; 784 wire_dt.size = req->size; 785 wire_dt.local = req->local; 786 wire_dt.remote = req->remote; 787 if (req->command == CTL_HA_DT_CMD_READ && req->callback != NULL) { 788 mtx_lock(&softc->ha_lock); 789 TAILQ_INSERT_TAIL(&softc->ha_dts, req, links); 790 mtx_unlock(&softc->ha_lock); 791 ctl_ha_msg_send(CTL_HA_CHAN_DATA, &wire_dt, sizeof(wire_dt), 792 M_WAITOK); 793 return (CTL_HA_STATUS_WAIT); 794 } 795 if (req->command == CTL_HA_DT_CMD_READ) { 796 status = ctl_ha_msg_send(CTL_HA_CHAN_DATA, &wire_dt, 797 sizeof(wire_dt), M_WAITOK); 798 } else { 799 status = ctl_ha_msg_send2(CTL_HA_CHAN_DATA, &wire_dt, 800 sizeof(wire_dt), req->local, req->size, M_WAITOK); 801 } 802 return (status); 803} 804 805static void 806ctl_dt_event_handler(ctl_ha_channel channel, ctl_ha_event event, int param) 807{ 808 struct ha_softc *softc = &ha_softc; 809 struct ctl_ha_dt_req *req; 810 ctl_ha_status isc_status; 811 812 if (event == CTL_HA_EVT_MSG_RECV) { 813 struct ha_dt_msg_wire wire_dt; 814 uint8_t *tmp; 815 int size; 816 817 size = min(sizeof(wire_dt), param); 818 isc_status = ctl_ha_msg_recv(CTL_HA_CHAN_DATA, &wire_dt, 819 size, M_WAITOK); 820 if (isc_status != CTL_HA_STATUS_SUCCESS) { 821 printf("%s: Error receiving message: %d\n", 822 __func__, isc_status); 823 return; 824 } 825 826 if (wire_dt.command == CTL_HA_DT_CMD_READ) { 827 wire_dt.command = CTL_HA_DT_CMD_WRITE; 828 tmp = wire_dt.local; 829 wire_dt.local = wire_dt.remote; 830 wire_dt.remote = tmp; 831 ctl_ha_msg_send2(CTL_HA_CHAN_DATA, &wire_dt, 832 sizeof(wire_dt), wire_dt.local, wire_dt.size, 833 M_WAITOK); 834 } else if (wire_dt.command == CTL_HA_DT_CMD_WRITE) { 835 isc_status = ctl_ha_msg_recv(CTL_HA_CHAN_DATA, 836 wire_dt.remote, wire_dt.size, M_WAITOK); 837 mtx_lock(&softc->ha_lock); 838 TAILQ_FOREACH(req, &softc->ha_dts, links) { 839 if (req->local == wire_dt.remote) { 840 TAILQ_REMOVE(&softc->ha_dts, req, links); 841 break; 842 } 843 } 844 mtx_unlock(&softc->ha_lock); 845 if (req) { 846 req->ret = isc_status; 847 req->callback(req); 848 } 849 } 850 } else if (event == CTL_HA_EVT_LINK_CHANGE) { 851 CTL_DEBUG_PRINT(("%s: Link state change to %d\n", __func__, 852 param)); 853 if (param != CTL_HA_LINK_ONLINE) { 854 mtx_lock(&softc->ha_lock); 855 while ((req = TAILQ_FIRST(&softc->ha_dts)) != NULL) { 856 TAILQ_REMOVE(&softc->ha_dts, req, links); 857 mtx_unlock(&softc->ha_lock); 858 req->ret = CTL_HA_STATUS_DISCONNECT; 859 req->callback(req); 860 mtx_lock(&softc->ha_lock); 861 } 862 mtx_unlock(&softc->ha_lock); 863 } 864 } else { 865 printf("%s: Unknown event %d\n", __func__, event); 866 } 867} 868 869ctl_ha_status 870ctl_ha_msg_init(struct ctl_softc *ctl_softc) 871{ 872 struct ha_softc *softc = &ha_softc; 873 int error; 874 875 softc->ha_ctl_softc = ctl_softc; 876 mtx_init(&softc->ha_lock, "CTL HA mutex", NULL, MTX_DEF); 877 mbufq_init(&softc->ha_sendq, INT_MAX); 878 TAILQ_INIT(&softc->ha_dts); 879 error = kproc_kthread_add(ctl_ha_conn_thread, softc, 880 &ctl_softc->ctl_proc, NULL, 0, 0, "ctl", "ha_tx"); 881 if (error != 0) { 882 printf("error creating CTL HA connection thread!\n"); 883 mtx_destroy(&softc->ha_lock); 884 return (CTL_HA_STATUS_ERROR); 885 } 886 softc->ha_shutdown_eh = EVENTHANDLER_REGISTER(shutdown_pre_sync, 887 ctl_ha_msg_shutdown, ctl_softc, SHUTDOWN_PRI_FIRST); 888 SYSCTL_ADD_PROC(&ctl_softc->sysctl_ctx, 889 SYSCTL_CHILDREN(ctl_softc->sysctl_tree), 890 OID_AUTO, "ha_peer", 891 CTLTYPE_STRING | CTLFLAG_RWTUN | CTLFLAG_MPSAFE, 892 softc, 0, ctl_ha_peer_sysctl, "A", "HA peer connection method"); 893 894 if (ctl_ha_msg_register(CTL_HA_CHAN_DATA, ctl_dt_event_handler) 895 != CTL_HA_STATUS_SUCCESS) { 896 printf("%s: ctl_ha_msg_register failed.\n", __func__); 897 } 898 899 return (CTL_HA_STATUS_SUCCESS); 900}; 901 902void 903ctl_ha_msg_shutdown(struct ctl_softc *ctl_softc) 904{ 905 struct ha_softc *softc = &ha_softc; 906 907 if (SCHEDULER_STOPPED()) 908 return; 909 910 /* Disconnect and shutdown threads. */ 911 mtx_lock(&softc->ha_lock); 912 if (softc->ha_shutdown < 2) { 913 softc->ha_shutdown = 1; 914 softc->ha_wakeup = 1; 915 wakeup(&softc->ha_wakeup); 916 while (softc->ha_shutdown < 2) { 917 msleep(&softc->ha_wakeup, &softc->ha_lock, 0, 918 "shutdown", hz); 919 } 920 } 921 mtx_unlock(&softc->ha_lock); 922}; 923 924ctl_ha_status 925ctl_ha_msg_destroy(struct ctl_softc *ctl_softc) 926{ 927 struct ha_softc *softc = &ha_softc; 928 929 if (softc->ha_shutdown_eh != NULL) { 930 EVENTHANDLER_DEREGISTER(shutdown_pre_sync, 931 softc->ha_shutdown_eh); 932 softc->ha_shutdown_eh = NULL; 933 } 934 935 ctl_ha_msg_shutdown(ctl_softc); /* Just in case. */ 936 937 if (ctl_ha_msg_deregister(CTL_HA_CHAN_DATA) != CTL_HA_STATUS_SUCCESS) 938 printf("%s: ctl_ha_msg_deregister failed.\n", __func__); 939 940 mtx_destroy(&softc->ha_lock); 941 return (CTL_HA_STATUS_SUCCESS); 942}; 943