1/*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2009-2010 The FreeBSD Foundation 5 * Copyright (c) 2010-2011 Pawel Jakub Dawidek <pawel@dawidek.net> 6 * All rights reserved. 7 * 8 * This software was developed by Pawel Jakub Dawidek under sponsorship from 9 * the FreeBSD Foundation. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33#include <sys/param.h> 34#include <sys/linker.h> 35#include <sys/module.h> 36#include <sys/stat.h> 37#include <sys/wait.h> 38 39#include <err.h> 40#include <errno.h> 41#include <libutil.h> 42#include <signal.h> 43#include <stdbool.h> 44#include <stdio.h> 45#include <stdlib.h> 46#include <string.h> 47#include <sysexits.h> 48#include <time.h> 49#include <unistd.h> 50 51#include <activemap.h> 52#include <pjdlog.h> 53 54#include "control.h" 55#include "event.h" 56#include "hast.h" 57#include "hast_proto.h" 58#include "hastd.h" 59#include "hooks.h" 60#include "subr.h" 61 62/* Path to configuration file. */ 63const char *cfgpath = HAST_CONFIG; 64/* Hastd configuration. */ 65static struct hastd_config *cfg; 66/* Was SIGINT or SIGTERM signal received? */ 67bool sigexit_received = false; 68/* Path to pidfile. */ 69static const char *pidfile; 70/* Pidfile handle. */ 71struct pidfh *pfh; 72/* Do we run in foreground? */ 73static bool foreground; 74 75/* How often check for hooks running for too long. */ 76#define REPORT_INTERVAL 5 77 78static void 79usage(void) 80{ 81 82 errx(EX_USAGE, "[-dFh] [-c config] [-P pidfile]"); 83} 84 85static void 86g_gate_load(void) 87{ 88 89 if (modfind("g_gate") == -1) { 90 /* Not present in kernel, try loading it. */ 91 if (kldload("geom_gate") == -1 || modfind("g_gate") == -1) { 92 if (errno != EEXIST) { 93 pjdlog_exit(EX_OSERR, 94 "Unable to load geom_gate module"); 95 } 96 } 97 } 98} 99 100void 101descriptors_cleanup(struct hast_resource *res) 102{ 103 struct hast_resource *tres, *tmres; 104 struct hastd_listen *lst; 105 106 TAILQ_FOREACH_SAFE(tres, &cfg->hc_resources, hr_next, tmres) { 107 if (tres == res) { 108 PJDLOG_VERIFY(res->hr_role == HAST_ROLE_SECONDARY || 109 (res->hr_remotein == NULL && 110 res->hr_remoteout == NULL)); 111 continue; 112 } 113 if (tres->hr_remotein != NULL) 114 proto_close(tres->hr_remotein); 115 if (tres->hr_remoteout != NULL) 116 proto_close(tres->hr_remoteout); 117 if (tres->hr_ctrl != NULL) 118 proto_close(tres->hr_ctrl); 119 if (tres->hr_event != NULL) 120 proto_close(tres->hr_event); 121 if (tres->hr_conn != NULL) 122 proto_close(tres->hr_conn); 123 TAILQ_REMOVE(&cfg->hc_resources, tres, hr_next); 124 free(tres); 125 } 126 if (cfg->hc_controlin != NULL) 127 proto_close(cfg->hc_controlin); 128 proto_close(cfg->hc_controlconn); 129 while ((lst = TAILQ_FIRST(&cfg->hc_listen)) != NULL) { 130 TAILQ_REMOVE(&cfg->hc_listen, lst, hl_next); 131 if (lst->hl_conn != NULL) 132 proto_close(lst->hl_conn); 133 free(lst); 134 } 135 (void)pidfile_close(pfh); 136 hook_fini(); 137 pjdlog_fini(); 138} 139 140static const char * 141dtype2str(mode_t mode) 142{ 143 144 if (S_ISBLK(mode)) 145 return ("block device"); 146 else if (S_ISCHR(mode)) 147 return ("character device"); 148 else if (S_ISDIR(mode)) 149 return ("directory"); 150 else if (S_ISFIFO(mode)) 151 return ("pipe or FIFO"); 152 else if (S_ISLNK(mode)) 153 return ("symbolic link"); 154 else if (S_ISREG(mode)) 155 return ("regular file"); 156 else if (S_ISSOCK(mode)) 157 return ("socket"); 158 else if (S_ISWHT(mode)) 159 return ("whiteout"); 160 else 161 return ("unknown"); 162} 163 164void 165descriptors_assert(const struct hast_resource *res, int pjdlogmode) 166{ 167 char msg[256]; 168 struct stat sb; 169 long maxfd; 170 bool isopen; 171 mode_t mode; 172 int fd; 173 174 /* 175 * At this point descriptor to syslog socket is closed, so if we want 176 * to log assertion message, we have to first store it in 'msg' local 177 * buffer and then open syslog socket and log it. 178 */ 179 msg[0] = '\0'; 180 181 maxfd = sysconf(_SC_OPEN_MAX); 182 if (maxfd == -1) { 183 pjdlog_init(pjdlogmode); 184 pjdlog_prefix_set("[%s] (%s) ", res->hr_name, 185 role2str(res->hr_role)); 186 pjdlog_errno(LOG_WARNING, "sysconf(_SC_OPEN_MAX) failed"); 187 pjdlog_fini(); 188 maxfd = 16384; 189 } 190 for (fd = 0; fd <= maxfd; fd++) { 191 if (fstat(fd, &sb) == 0) { 192 isopen = true; 193 mode = sb.st_mode; 194 } else if (errno == EBADF) { 195 isopen = false; 196 mode = 0; 197 } else { 198 (void)snprintf(msg, sizeof(msg), 199 "Unable to fstat descriptor %d: %s", fd, 200 strerror(errno)); 201 break; 202 } 203 if (fd == STDIN_FILENO || fd == STDOUT_FILENO || 204 fd == STDERR_FILENO) { 205 if (!isopen) { 206 (void)snprintf(msg, sizeof(msg), 207 "Descriptor %d (%s) is closed, but should be open.", 208 fd, (fd == STDIN_FILENO ? "stdin" : 209 (fd == STDOUT_FILENO ? "stdout" : "stderr"))); 210 break; 211 } 212 } else if (fd == proto_descriptor(res->hr_event)) { 213 if (!isopen) { 214 (void)snprintf(msg, sizeof(msg), 215 "Descriptor %d (event) is closed, but should be open.", 216 fd); 217 break; 218 } 219 if (!S_ISSOCK(mode)) { 220 (void)snprintf(msg, sizeof(msg), 221 "Descriptor %d (event) is %s, but should be %s.", 222 fd, dtype2str(mode), dtype2str(S_IFSOCK)); 223 break; 224 } 225 } else if (fd == proto_descriptor(res->hr_ctrl)) { 226 if (!isopen) { 227 (void)snprintf(msg, sizeof(msg), 228 "Descriptor %d (ctrl) is closed, but should be open.", 229 fd); 230 break; 231 } 232 if (!S_ISSOCK(mode)) { 233 (void)snprintf(msg, sizeof(msg), 234 "Descriptor %d (ctrl) is %s, but should be %s.", 235 fd, dtype2str(mode), dtype2str(S_IFSOCK)); 236 break; 237 } 238 } else if (res->hr_role == HAST_ROLE_PRIMARY && 239 fd == proto_descriptor(res->hr_conn)) { 240 if (!isopen) { 241 (void)snprintf(msg, sizeof(msg), 242 "Descriptor %d (conn) is closed, but should be open.", 243 fd); 244 break; 245 } 246 if (!S_ISSOCK(mode)) { 247 (void)snprintf(msg, sizeof(msg), 248 "Descriptor %d (conn) is %s, but should be %s.", 249 fd, dtype2str(mode), dtype2str(S_IFSOCK)); 250 break; 251 } 252 } else if (res->hr_role == HAST_ROLE_SECONDARY && 253 res->hr_conn != NULL && 254 fd == proto_descriptor(res->hr_conn)) { 255 if (isopen) { 256 (void)snprintf(msg, sizeof(msg), 257 "Descriptor %d (conn) is open, but should be closed.", 258 fd); 259 break; 260 } 261 } else if (res->hr_role == HAST_ROLE_SECONDARY && 262 fd == proto_descriptor(res->hr_remotein)) { 263 if (!isopen) { 264 (void)snprintf(msg, sizeof(msg), 265 "Descriptor %d (remote in) is closed, but should be open.", 266 fd); 267 break; 268 } 269 if (!S_ISSOCK(mode)) { 270 (void)snprintf(msg, sizeof(msg), 271 "Descriptor %d (remote in) is %s, but should be %s.", 272 fd, dtype2str(mode), dtype2str(S_IFSOCK)); 273 break; 274 } 275 } else if (res->hr_role == HAST_ROLE_SECONDARY && 276 fd == proto_descriptor(res->hr_remoteout)) { 277 if (!isopen) { 278 (void)snprintf(msg, sizeof(msg), 279 "Descriptor %d (remote out) is closed, but should be open.", 280 fd); 281 break; 282 } 283 if (!S_ISSOCK(mode)) { 284 (void)snprintf(msg, sizeof(msg), 285 "Descriptor %d (remote out) is %s, but should be %s.", 286 fd, dtype2str(mode), dtype2str(S_IFSOCK)); 287 break; 288 } 289 } else { 290 if (isopen) { 291 (void)snprintf(msg, sizeof(msg), 292 "Descriptor %d is open (%s), but should be closed.", 293 fd, dtype2str(mode)); 294 break; 295 } 296 } 297 } 298 if (msg[0] != '\0') { 299 pjdlog_init(pjdlogmode); 300 pjdlog_prefix_set("[%s] (%s) ", res->hr_name, 301 role2str(res->hr_role)); 302 PJDLOG_ABORT("%s", msg); 303 } 304} 305 306static void 307child_exit_log(unsigned int pid, int status) 308{ 309 310 if (WIFEXITED(status) && WEXITSTATUS(status) == 0) { 311 pjdlog_debug(1, "Worker process exited gracefully (pid=%u).", 312 pid); 313 } else if (WIFSIGNALED(status)) { 314 pjdlog_error("Worker process killed (pid=%u, signal=%d).", 315 pid, WTERMSIG(status)); 316 } else { 317 pjdlog_error("Worker process exited ungracefully (pid=%u, exitcode=%d).", 318 pid, WIFEXITED(status) ? WEXITSTATUS(status) : -1); 319 } 320} 321 322static void 323child_exit(void) 324{ 325 struct hast_resource *res; 326 int status; 327 pid_t pid; 328 329 while ((pid = wait3(&status, WNOHANG, NULL)) > 0) { 330 /* Find resource related to the process that just exited. */ 331 TAILQ_FOREACH(res, &cfg->hc_resources, hr_next) { 332 if (pid == res->hr_workerpid) 333 break; 334 } 335 if (res == NULL) { 336 /* 337 * This can happen when new connection arrives and we 338 * cancel child responsible for the old one or if this 339 * was hook which we executed. 340 */ 341 hook_check_one(pid, status); 342 continue; 343 } 344 pjdlog_prefix_set("[%s] (%s) ", res->hr_name, 345 role2str(res->hr_role)); 346 child_exit_log(pid, status); 347 child_cleanup(res); 348 if (res->hr_role == HAST_ROLE_PRIMARY) { 349 /* 350 * Restart child process if it was killed by signal 351 * or exited because of temporary problem. 352 */ 353 if (WIFSIGNALED(status) || 354 (WIFEXITED(status) && 355 WEXITSTATUS(status) == EX_TEMPFAIL)) { 356 sleep(1); 357 pjdlog_info("Restarting worker process."); 358 hastd_primary(res); 359 } else { 360 res->hr_role = HAST_ROLE_INIT; 361 pjdlog_info("Changing resource role back to %s.", 362 role2str(res->hr_role)); 363 } 364 } 365 pjdlog_prefix_set("%s", ""); 366 } 367} 368 369static bool 370resource_needs_restart(const struct hast_resource *res0, 371 const struct hast_resource *res1) 372{ 373 374 PJDLOG_ASSERT(strcmp(res0->hr_name, res1->hr_name) == 0); 375 376 if (strcmp(res0->hr_provname, res1->hr_provname) != 0) 377 return (true); 378 if (strcmp(res0->hr_localpath, res1->hr_localpath) != 0) 379 return (true); 380 if (res0->hr_role == HAST_ROLE_INIT || 381 res0->hr_role == HAST_ROLE_SECONDARY) { 382 if (strcmp(res0->hr_remoteaddr, res1->hr_remoteaddr) != 0) 383 return (true); 384 if (strcmp(res0->hr_sourceaddr, res1->hr_sourceaddr) != 0) 385 return (true); 386 if (res0->hr_replication != res1->hr_replication) 387 return (true); 388 if (res0->hr_checksum != res1->hr_checksum) 389 return (true); 390 if (res0->hr_compression != res1->hr_compression) 391 return (true); 392 if (res0->hr_timeout != res1->hr_timeout) 393 return (true); 394 if (strcmp(res0->hr_exec, res1->hr_exec) != 0) 395 return (true); 396 /* 397 * When metaflush has changed we don't really need restart, 398 * but it is just easier this way. 399 */ 400 if (res0->hr_metaflush != res1->hr_metaflush) 401 return (true); 402 } 403 return (false); 404} 405 406static bool 407resource_needs_reload(const struct hast_resource *res0, 408 const struct hast_resource *res1) 409{ 410 411 PJDLOG_ASSERT(strcmp(res0->hr_name, res1->hr_name) == 0); 412 PJDLOG_ASSERT(strcmp(res0->hr_provname, res1->hr_provname) == 0); 413 PJDLOG_ASSERT(strcmp(res0->hr_localpath, res1->hr_localpath) == 0); 414 415 if (res0->hr_role != HAST_ROLE_PRIMARY) 416 return (false); 417 418 if (strcmp(res0->hr_remoteaddr, res1->hr_remoteaddr) != 0) 419 return (true); 420 if (strcmp(res0->hr_sourceaddr, res1->hr_sourceaddr) != 0) 421 return (true); 422 if (res0->hr_replication != res1->hr_replication) 423 return (true); 424 if (res0->hr_checksum != res1->hr_checksum) 425 return (true); 426 if (res0->hr_compression != res1->hr_compression) 427 return (true); 428 if (res0->hr_timeout != res1->hr_timeout) 429 return (true); 430 if (strcmp(res0->hr_exec, res1->hr_exec) != 0) 431 return (true); 432 if (res0->hr_metaflush != res1->hr_metaflush) 433 return (true); 434 return (false); 435} 436 437static void 438resource_reload(const struct hast_resource *res) 439{ 440 struct nv *nvin, *nvout; 441 int error; 442 443 PJDLOG_ASSERT(res->hr_role == HAST_ROLE_PRIMARY); 444 445 nvout = nv_alloc(); 446 nv_add_uint8(nvout, CONTROL_RELOAD, "cmd"); 447 nv_add_string(nvout, res->hr_remoteaddr, "remoteaddr"); 448 nv_add_string(nvout, res->hr_sourceaddr, "sourceaddr"); 449 nv_add_int32(nvout, (int32_t)res->hr_replication, "replication"); 450 nv_add_int32(nvout, (int32_t)res->hr_checksum, "checksum"); 451 nv_add_int32(nvout, (int32_t)res->hr_compression, "compression"); 452 nv_add_int32(nvout, (int32_t)res->hr_timeout, "timeout"); 453 nv_add_string(nvout, res->hr_exec, "exec"); 454 nv_add_int32(nvout, (int32_t)res->hr_metaflush, "metaflush"); 455 if (nv_error(nvout) != 0) { 456 nv_free(nvout); 457 pjdlog_error("Unable to allocate header for reload message."); 458 return; 459 } 460 if (hast_proto_send(res, res->hr_ctrl, nvout, NULL, 0) == -1) { 461 pjdlog_errno(LOG_ERR, "Unable to send reload message"); 462 nv_free(nvout); 463 return; 464 } 465 nv_free(nvout); 466 467 /* Receive response. */ 468 if (hast_proto_recv_hdr(res->hr_ctrl, &nvin) == -1) { 469 pjdlog_errno(LOG_ERR, "Unable to receive reload reply"); 470 return; 471 } 472 error = nv_get_int16(nvin, "error"); 473 nv_free(nvin); 474 if (error != 0) { 475 pjdlog_common(LOG_ERR, 0, error, "Reload failed"); 476 return; 477 } 478} 479 480static void 481hastd_reload(void) 482{ 483 struct hastd_config *newcfg; 484 struct hast_resource *nres, *cres, *tres; 485 struct hastd_listen *nlst, *clst; 486 struct pidfh *newpfh; 487 unsigned int nlisten; 488 uint8_t role; 489 pid_t otherpid; 490 491 pjdlog_info("Reloading configuration..."); 492 493 newpfh = NULL; 494 495 newcfg = yy_config_parse(cfgpath, false); 496 if (newcfg == NULL) 497 goto failed; 498 499 /* 500 * Check if control address has changed. 501 */ 502 if (strcmp(cfg->hc_controladdr, newcfg->hc_controladdr) != 0) { 503 if (proto_server(newcfg->hc_controladdr, 504 &newcfg->hc_controlconn) == -1) { 505 pjdlog_errno(LOG_ERR, 506 "Unable to listen on control address %s", 507 newcfg->hc_controladdr); 508 goto failed; 509 } 510 } 511 /* 512 * Check if any listen address has changed. 513 */ 514 nlisten = 0; 515 TAILQ_FOREACH(nlst, &newcfg->hc_listen, hl_next) { 516 TAILQ_FOREACH(clst, &cfg->hc_listen, hl_next) { 517 if (strcmp(nlst->hl_addr, clst->hl_addr) == 0) 518 break; 519 } 520 if (clst != NULL && clst->hl_conn != NULL) { 521 pjdlog_info("Keep listening on address %s.", 522 nlst->hl_addr); 523 nlst->hl_conn = clst->hl_conn; 524 nlisten++; 525 } else if (proto_server(nlst->hl_addr, &nlst->hl_conn) == 0) { 526 pjdlog_info("Listening on new address %s.", 527 nlst->hl_addr); 528 nlisten++; 529 } else { 530 pjdlog_errno(LOG_WARNING, 531 "Unable to listen on address %s", nlst->hl_addr); 532 } 533 } 534 if (nlisten == 0) { 535 pjdlog_error("No addresses to listen on."); 536 goto failed; 537 } 538 /* 539 * Check if pidfile's path has changed. 540 */ 541 if (!foreground && pidfile == NULL && 542 strcmp(cfg->hc_pidfile, newcfg->hc_pidfile) != 0) { 543 newpfh = pidfile_open(newcfg->hc_pidfile, 0600, &otherpid); 544 if (newpfh == NULL) { 545 if (errno == EEXIST) { 546 pjdlog_errno(LOG_WARNING, 547 "Another hastd is already running, pidfile: %s, pid: %jd.", 548 newcfg->hc_pidfile, (intmax_t)otherpid); 549 } else { 550 pjdlog_errno(LOG_WARNING, 551 "Unable to open or create pidfile %s", 552 newcfg->hc_pidfile); 553 } 554 } else if (pidfile_write(newpfh) == -1) { 555 /* Write PID to a file. */ 556 pjdlog_errno(LOG_WARNING, 557 "Unable to write PID to file %s", 558 newcfg->hc_pidfile); 559 } else { 560 pjdlog_debug(1, "PID stored in %s.", 561 newcfg->hc_pidfile); 562 } 563 } 564 565 /* No failures from now on. */ 566 567 /* 568 * Switch to new control socket. 569 */ 570 if (newcfg->hc_controlconn != NULL) { 571 pjdlog_info("Control socket changed from %s to %s.", 572 cfg->hc_controladdr, newcfg->hc_controladdr); 573 proto_close(cfg->hc_controlconn); 574 cfg->hc_controlconn = newcfg->hc_controlconn; 575 newcfg->hc_controlconn = NULL; 576 strlcpy(cfg->hc_controladdr, newcfg->hc_controladdr, 577 sizeof(cfg->hc_controladdr)); 578 } 579 /* 580 * Switch to new pidfile. 581 */ 582 if (newpfh != NULL) { 583 pjdlog_info("Pidfile changed from %s to %s.", cfg->hc_pidfile, 584 newcfg->hc_pidfile); 585 (void)pidfile_remove(pfh); 586 pfh = newpfh; 587 (void)strlcpy(cfg->hc_pidfile, newcfg->hc_pidfile, 588 sizeof(cfg->hc_pidfile)); 589 } 590 /* 591 * Switch to new listen addresses. Close all that were removed. 592 */ 593 while ((clst = TAILQ_FIRST(&cfg->hc_listen)) != NULL) { 594 TAILQ_FOREACH(nlst, &newcfg->hc_listen, hl_next) { 595 if (strcmp(nlst->hl_addr, clst->hl_addr) == 0) 596 break; 597 } 598 if (nlst == NULL && clst->hl_conn != NULL) { 599 proto_close(clst->hl_conn); 600 pjdlog_info("No longer listening on address %s.", 601 clst->hl_addr); 602 } 603 TAILQ_REMOVE(&cfg->hc_listen, clst, hl_next); 604 free(clst); 605 } 606 TAILQ_CONCAT(&cfg->hc_listen, &newcfg->hc_listen, hl_next); 607 608 /* 609 * Stop and remove resources that were removed from the configuration. 610 */ 611 TAILQ_FOREACH_SAFE(cres, &cfg->hc_resources, hr_next, tres) { 612 TAILQ_FOREACH(nres, &newcfg->hc_resources, hr_next) { 613 if (strcmp(cres->hr_name, nres->hr_name) == 0) 614 break; 615 } 616 if (nres == NULL) { 617 control_set_role(cres, HAST_ROLE_INIT); 618 TAILQ_REMOVE(&cfg->hc_resources, cres, hr_next); 619 pjdlog_info("Resource %s removed.", cres->hr_name); 620 free(cres); 621 } 622 } 623 /* 624 * Move new resources to the current configuration. 625 */ 626 TAILQ_FOREACH_SAFE(nres, &newcfg->hc_resources, hr_next, tres) { 627 TAILQ_FOREACH(cres, &cfg->hc_resources, hr_next) { 628 if (strcmp(cres->hr_name, nres->hr_name) == 0) 629 break; 630 } 631 if (cres == NULL) { 632 TAILQ_REMOVE(&newcfg->hc_resources, nres, hr_next); 633 TAILQ_INSERT_TAIL(&cfg->hc_resources, nres, hr_next); 634 pjdlog_info("Resource %s added.", nres->hr_name); 635 } 636 } 637 /* 638 * Deal with modified resources. 639 * Depending on what has changed exactly we might want to perform 640 * different actions. 641 * 642 * We do full resource restart in the following situations: 643 * Resource role is INIT or SECONDARY. 644 * Resource role is PRIMARY and path to local component or provider 645 * name has changed. 646 * In case of PRIMARY, the worker process will be killed and restarted, 647 * which also means removing /dev/hast/<name> provider and 648 * recreating it. 649 * 650 * We do just reload (send SIGHUP to worker process) if we act as 651 * PRIMARY, but only if remote address, source address, replication 652 * mode, timeout, execution path or metaflush has changed. 653 * For those, there is no need to restart worker process. 654 * If PRIMARY receives SIGHUP, it will reconnect if remote address or 655 * source address has changed or it will set new timeout if only timeout 656 * has changed or it will update metaflush if only metaflush has 657 * changed. 658 */ 659 TAILQ_FOREACH_SAFE(nres, &newcfg->hc_resources, hr_next, tres) { 660 TAILQ_FOREACH(cres, &cfg->hc_resources, hr_next) { 661 if (strcmp(cres->hr_name, nres->hr_name) == 0) 662 break; 663 } 664 PJDLOG_ASSERT(cres != NULL); 665 if (resource_needs_restart(cres, nres)) { 666 pjdlog_info("Resource %s configuration was modified, restarting it.", 667 cres->hr_name); 668 role = cres->hr_role; 669 control_set_role(cres, HAST_ROLE_INIT); 670 TAILQ_REMOVE(&cfg->hc_resources, cres, hr_next); 671 free(cres); 672 TAILQ_REMOVE(&newcfg->hc_resources, nres, hr_next); 673 TAILQ_INSERT_TAIL(&cfg->hc_resources, nres, hr_next); 674 control_set_role(nres, role); 675 } else if (resource_needs_reload(cres, nres)) { 676 pjdlog_info("Resource %s configuration was modified, reloading it.", 677 cres->hr_name); 678 strlcpy(cres->hr_remoteaddr, nres->hr_remoteaddr, 679 sizeof(cres->hr_remoteaddr)); 680 strlcpy(cres->hr_sourceaddr, nres->hr_sourceaddr, 681 sizeof(cres->hr_sourceaddr)); 682 cres->hr_replication = nres->hr_replication; 683 cres->hr_checksum = nres->hr_checksum; 684 cres->hr_compression = nres->hr_compression; 685 cres->hr_timeout = nres->hr_timeout; 686 strlcpy(cres->hr_exec, nres->hr_exec, 687 sizeof(cres->hr_exec)); 688 cres->hr_metaflush = nres->hr_metaflush; 689 if (cres->hr_workerpid != 0) 690 resource_reload(cres); 691 } 692 } 693 694 yy_config_free(newcfg); 695 pjdlog_info("Configuration reloaded successfully."); 696 return; 697failed: 698 if (newcfg != NULL) { 699 if (newcfg->hc_controlconn != NULL) 700 proto_close(newcfg->hc_controlconn); 701 while ((nlst = TAILQ_FIRST(&newcfg->hc_listen)) != NULL) { 702 if (nlst->hl_conn != NULL) { 703 TAILQ_FOREACH(clst, &cfg->hc_listen, hl_next) { 704 if (strcmp(nlst->hl_addr, 705 clst->hl_addr) == 0) { 706 break; 707 } 708 } 709 if (clst == NULL || clst->hl_conn == NULL) 710 proto_close(nlst->hl_conn); 711 } 712 TAILQ_REMOVE(&newcfg->hc_listen, nlst, hl_next); 713 free(nlst); 714 } 715 yy_config_free(newcfg); 716 } 717 if (newpfh != NULL) 718 (void)pidfile_remove(newpfh); 719 pjdlog_warning("Configuration not reloaded."); 720} 721 722static void 723terminate_workers(void) 724{ 725 struct hast_resource *res; 726 727 pjdlog_info("Termination signal received, exiting."); 728 TAILQ_FOREACH(res, &cfg->hc_resources, hr_next) { 729 if (res->hr_workerpid == 0) 730 continue; 731 pjdlog_info("Terminating worker process (resource=%s, role=%s, pid=%u).", 732 res->hr_name, role2str(res->hr_role), res->hr_workerpid); 733 if (kill(res->hr_workerpid, SIGTERM) == 0) 734 continue; 735 pjdlog_errno(LOG_WARNING, 736 "Unable to send signal to worker process (resource=%s, role=%s, pid=%u).", 737 res->hr_name, role2str(res->hr_role), res->hr_workerpid); 738 } 739} 740 741static void 742listen_accept(struct hastd_listen *lst) 743{ 744 struct hast_resource *res; 745 struct proto_conn *conn; 746 struct nv *nvin, *nvout, *nverr; 747 const char *resname; 748 const unsigned char *token; 749 char laddr[256], raddr[256]; 750 uint8_t version; 751 size_t size; 752 pid_t pid; 753 int status; 754 755 proto_local_address(lst->hl_conn, laddr, sizeof(laddr)); 756 pjdlog_debug(1, "Accepting connection to %s.", laddr); 757 758 if (proto_accept(lst->hl_conn, &conn) == -1) { 759 pjdlog_errno(LOG_ERR, "Unable to accept connection %s", laddr); 760 return; 761 } 762 763 proto_local_address(conn, laddr, sizeof(laddr)); 764 proto_remote_address(conn, raddr, sizeof(raddr)); 765 pjdlog_info("Connection from %s to %s.", raddr, laddr); 766 767 /* Error in setting timeout is not critical, but why should it fail? */ 768 if (proto_timeout(conn, HAST_TIMEOUT) == -1) 769 pjdlog_errno(LOG_WARNING, "Unable to set connection timeout"); 770 771 nvin = nvout = nverr = NULL; 772 773 /* 774 * Before receiving any data see if remote host have access to any 775 * resource. 776 */ 777 TAILQ_FOREACH(res, &cfg->hc_resources, hr_next) { 778 if (proto_address_match(conn, res->hr_remoteaddr)) 779 break; 780 } 781 if (res == NULL) { 782 pjdlog_error("Client %s isn't known.", raddr); 783 goto close; 784 } 785 /* Ok, remote host can access at least one resource. */ 786 787 if (hast_proto_recv_hdr(conn, &nvin) == -1) { 788 pjdlog_errno(LOG_ERR, "Unable to receive header from %s", 789 raddr); 790 goto close; 791 } 792 793 resname = nv_get_string(nvin, "resource"); 794 if (resname == NULL) { 795 pjdlog_error("No 'resource' field in the header received from %s.", 796 raddr); 797 goto close; 798 } 799 pjdlog_debug(2, "%s: resource=%s", raddr, resname); 800 version = nv_get_uint8(nvin, "version"); 801 pjdlog_debug(2, "%s: version=%hhu", raddr, version); 802 if (version == 0) { 803 /* 804 * If no version is sent, it means this is protocol version 1. 805 */ 806 version = 1; 807 } 808 token = nv_get_uint8_array(nvin, &size, "token"); 809 /* 810 * NULL token means that this is first connection. 811 */ 812 if (token != NULL && size != sizeof(res->hr_token)) { 813 pjdlog_error("Received token of invalid size from %s (expected %zu, got %zu).", 814 raddr, sizeof(res->hr_token), size); 815 goto close; 816 } 817 818 /* 819 * From now on we want to send errors to the remote node. 820 */ 821 nverr = nv_alloc(); 822 823 /* Find resource related to this connection. */ 824 TAILQ_FOREACH(res, &cfg->hc_resources, hr_next) { 825 if (strcmp(resname, res->hr_name) == 0) 826 break; 827 } 828 /* Have we found the resource? */ 829 if (res == NULL) { 830 pjdlog_error("No resource '%s' as requested by %s.", 831 resname, raddr); 832 nv_add_stringf(nverr, "errmsg", "Resource not configured."); 833 goto fail; 834 } 835 836 /* Now that we know resource name setup log prefix. */ 837 pjdlog_prefix_set("[%s] (%s) ", res->hr_name, role2str(res->hr_role)); 838 839 /* Does the remote host have access to this resource? */ 840 if (!proto_address_match(conn, res->hr_remoteaddr)) { 841 pjdlog_error("Client %s has no access to the resource.", raddr); 842 nv_add_stringf(nverr, "errmsg", "No access to the resource."); 843 goto fail; 844 } 845 /* Is the resource marked as secondary? */ 846 if (res->hr_role != HAST_ROLE_SECONDARY) { 847 pjdlog_warning("We act as %s for the resource and not as %s as requested by %s.", 848 role2str(res->hr_role), role2str(HAST_ROLE_SECONDARY), 849 raddr); 850 nv_add_stringf(nverr, "errmsg", 851 "Remote node acts as %s for the resource and not as %s.", 852 role2str(res->hr_role), role2str(HAST_ROLE_SECONDARY)); 853 if (res->hr_role == HAST_ROLE_PRIMARY) { 854 /* 855 * If we act as primary request the other side to wait 856 * for us a bit, as we might be finishing cleanups. 857 */ 858 nv_add_uint8(nverr, 1, "wait"); 859 } 860 goto fail; 861 } 862 /* Does token (if exists) match? */ 863 if (token != NULL && memcmp(token, res->hr_token, 864 sizeof(res->hr_token)) != 0) { 865 pjdlog_error("Token received from %s doesn't match.", raddr); 866 nv_add_stringf(nverr, "errmsg", "Token doesn't match."); 867 goto fail; 868 } 869 /* 870 * If there is no token, but we have half-open connection 871 * (only remotein) or full connection (worker process is running) 872 * we have to cancel those and accept the new connection. 873 */ 874 if (token == NULL) { 875 PJDLOG_ASSERT(res->hr_remoteout == NULL); 876 pjdlog_debug(1, "Initial connection from %s.", raddr); 877 if (res->hr_workerpid != 0) { 878 PJDLOG_ASSERT(res->hr_remotein == NULL); 879 pjdlog_debug(1, 880 "Worker process exists (pid=%u), stopping it.", 881 (unsigned int)res->hr_workerpid); 882 /* Stop child process. */ 883 if (kill(res->hr_workerpid, SIGINT) == -1) { 884 pjdlog_errno(LOG_ERR, 885 "Unable to stop worker process (pid=%u)", 886 (unsigned int)res->hr_workerpid); 887 /* 888 * Other than logging the problem we 889 * ignore it - nothing smart to do. 890 */ 891 } 892 /* Wait for it to exit. */ 893 else if ((pid = waitpid(res->hr_workerpid, 894 &status, 0)) != res->hr_workerpid) { 895 /* We can only log the problem. */ 896 pjdlog_errno(LOG_ERR, 897 "Waiting for worker process (pid=%u) failed", 898 (unsigned int)res->hr_workerpid); 899 } else { 900 child_exit_log(res->hr_workerpid, status); 901 } 902 child_cleanup(res); 903 } else if (res->hr_remotein != NULL) { 904 char oaddr[256]; 905 906 proto_remote_address(res->hr_remotein, oaddr, 907 sizeof(oaddr)); 908 pjdlog_debug(1, 909 "Canceling half-open connection from %s on connection from %s.", 910 oaddr, raddr); 911 proto_close(res->hr_remotein); 912 res->hr_remotein = NULL; 913 } 914 } 915 916 /* 917 * Checks and cleanups are done. 918 */ 919 920 if (token == NULL) { 921 if (version > HAST_PROTO_VERSION) { 922 pjdlog_info("Remote protocol version %hhu is not supported, falling back to version %hhu.", 923 version, (unsigned char)HAST_PROTO_VERSION); 924 version = HAST_PROTO_VERSION; 925 } 926 pjdlog_debug(1, "Negotiated protocol version %hhu.", version); 927 res->hr_version = version; 928 arc4random_buf(res->hr_token, sizeof(res->hr_token)); 929 nvout = nv_alloc(); 930 nv_add_uint8(nvout, version, "version"); 931 nv_add_uint8_array(nvout, res->hr_token, 932 sizeof(res->hr_token), "token"); 933 if (nv_error(nvout) != 0) { 934 pjdlog_common(LOG_ERR, 0, nv_error(nvout), 935 "Unable to prepare return header for %s", raddr); 936 nv_add_stringf(nverr, "errmsg", 937 "Remote node was unable to prepare return header: %s.", 938 strerror(nv_error(nvout))); 939 goto fail; 940 } 941 if (hast_proto_send(res, conn, nvout, NULL, 0) == -1) { 942 int error = errno; 943 944 pjdlog_errno(LOG_ERR, "Unable to send response to %s", 945 raddr); 946 nv_add_stringf(nverr, "errmsg", 947 "Remote node was unable to send response: %s.", 948 strerror(error)); 949 goto fail; 950 } 951 res->hr_remotein = conn; 952 pjdlog_debug(1, "Incoming connection from %s configured.", 953 raddr); 954 } else { 955 res->hr_remoteout = conn; 956 pjdlog_debug(1, "Outgoing connection to %s configured.", raddr); 957 hastd_secondary(res, nvin); 958 } 959 nv_free(nvin); 960 nv_free(nvout); 961 nv_free(nverr); 962 pjdlog_prefix_set("%s", ""); 963 return; 964fail: 965 if (nv_error(nverr) != 0) { 966 pjdlog_common(LOG_ERR, 0, nv_error(nverr), 967 "Unable to prepare error header for %s", raddr); 968 goto close; 969 } 970 if (hast_proto_send(NULL, conn, nverr, NULL, 0) == -1) { 971 pjdlog_errno(LOG_ERR, "Unable to send error to %s", raddr); 972 goto close; 973 } 974close: 975 if (nvin != NULL) 976 nv_free(nvin); 977 if (nvout != NULL) 978 nv_free(nvout); 979 if (nverr != NULL) 980 nv_free(nverr); 981 proto_close(conn); 982 pjdlog_prefix_set("%s", ""); 983} 984 985static void 986connection_migrate(struct hast_resource *res) 987{ 988 struct proto_conn *conn; 989 int16_t val = 0; 990 991 pjdlog_prefix_set("[%s] (%s) ", res->hr_name, role2str(res->hr_role)); 992 993 PJDLOG_ASSERT(res->hr_role == HAST_ROLE_PRIMARY); 994 995 if (proto_recv(res->hr_conn, &val, sizeof(val)) == -1) { 996 pjdlog_errno(LOG_WARNING, 997 "Unable to receive connection command"); 998 return; 999 } 1000 if (proto_client(res->hr_sourceaddr[0] != '\0' ? res->hr_sourceaddr : NULL, 1001 res->hr_remoteaddr, &conn) == -1) { 1002 val = errno; 1003 pjdlog_errno(LOG_WARNING, 1004 "Unable to create outgoing connection to %s", 1005 res->hr_remoteaddr); 1006 goto out; 1007 } 1008 if (proto_connect(conn, -1) == -1) { 1009 val = errno; 1010 pjdlog_errno(LOG_WARNING, "Unable to connect to %s", 1011 res->hr_remoteaddr); 1012 proto_close(conn); 1013 goto out; 1014 } 1015 val = 0; 1016out: 1017 if (proto_send(res->hr_conn, &val, sizeof(val)) == -1) { 1018 pjdlog_errno(LOG_WARNING, 1019 "Unable to send reply to connection request"); 1020 } 1021 if (val == 0 && proto_connection_send(res->hr_conn, conn) == -1) 1022 pjdlog_errno(LOG_WARNING, "Unable to send connection"); 1023 1024 pjdlog_prefix_set("%s", ""); 1025} 1026 1027static void 1028check_signals(void) 1029{ 1030 struct timespec sigtimeout; 1031 sigset_t mask; 1032 int signo; 1033 1034 sigtimeout.tv_sec = 0; 1035 sigtimeout.tv_nsec = 0; 1036 1037 PJDLOG_VERIFY(sigemptyset(&mask) == 0); 1038 PJDLOG_VERIFY(sigaddset(&mask, SIGHUP) == 0); 1039 PJDLOG_VERIFY(sigaddset(&mask, SIGINT) == 0); 1040 PJDLOG_VERIFY(sigaddset(&mask, SIGTERM) == 0); 1041 PJDLOG_VERIFY(sigaddset(&mask, SIGCHLD) == 0); 1042 1043 while ((signo = sigtimedwait(&mask, NULL, &sigtimeout)) != -1) { 1044 switch (signo) { 1045 case SIGINT: 1046 case SIGTERM: 1047 sigexit_received = true; 1048 terminate_workers(); 1049 proto_close(cfg->hc_controlconn); 1050 exit(EX_OK); 1051 break; 1052 case SIGCHLD: 1053 child_exit(); 1054 break; 1055 case SIGHUP: 1056 hastd_reload(); 1057 break; 1058 default: 1059 PJDLOG_ABORT("Unexpected signal (%d).", signo); 1060 } 1061 } 1062} 1063 1064static void 1065main_loop(void) 1066{ 1067 struct hast_resource *res; 1068 struct hastd_listen *lst; 1069 struct timeval seltimeout; 1070 int fd, maxfd, ret; 1071 time_t lastcheck, now; 1072 fd_set rfds; 1073 1074 lastcheck = time(NULL); 1075 seltimeout.tv_sec = REPORT_INTERVAL; 1076 seltimeout.tv_usec = 0; 1077 1078 for (;;) { 1079 check_signals(); 1080 1081 /* Setup descriptors for select(2). */ 1082 FD_ZERO(&rfds); 1083 maxfd = fd = proto_descriptor(cfg->hc_controlconn); 1084 PJDLOG_ASSERT(fd >= 0); 1085 FD_SET(fd, &rfds); 1086 TAILQ_FOREACH(lst, &cfg->hc_listen, hl_next) { 1087 if (lst->hl_conn == NULL) 1088 continue; 1089 fd = proto_descriptor(lst->hl_conn); 1090 PJDLOG_ASSERT(fd >= 0); 1091 FD_SET(fd, &rfds); 1092 maxfd = MAX(fd, maxfd); 1093 } 1094 TAILQ_FOREACH(res, &cfg->hc_resources, hr_next) { 1095 if (res->hr_event == NULL) 1096 continue; 1097 fd = proto_descriptor(res->hr_event); 1098 PJDLOG_ASSERT(fd >= 0); 1099 FD_SET(fd, &rfds); 1100 maxfd = MAX(fd, maxfd); 1101 if (res->hr_role == HAST_ROLE_PRIMARY) { 1102 /* Only primary workers asks for connections. */ 1103 PJDLOG_ASSERT(res->hr_conn != NULL); 1104 fd = proto_descriptor(res->hr_conn); 1105 PJDLOG_ASSERT(fd >= 0); 1106 FD_SET(fd, &rfds); 1107 maxfd = MAX(fd, maxfd); 1108 } else { 1109 PJDLOG_ASSERT(res->hr_conn == NULL); 1110 } 1111 } 1112 1113 PJDLOG_ASSERT(maxfd + 1 <= (int)FD_SETSIZE); 1114 ret = select(maxfd + 1, &rfds, NULL, NULL, &seltimeout); 1115 now = time(NULL); 1116 if (lastcheck + REPORT_INTERVAL <= now) { 1117 hook_check(); 1118 lastcheck = now; 1119 } 1120 if (ret == 0) { 1121 /* 1122 * select(2) timed out, so there should be no 1123 * descriptors to check. 1124 */ 1125 continue; 1126 } else if (ret == -1) { 1127 if (errno == EINTR) 1128 continue; 1129 KEEP_ERRNO((void)pidfile_remove(pfh)); 1130 pjdlog_exit(EX_OSERR, "select() failed"); 1131 } 1132 1133 /* 1134 * Check for signals before we do anything to update our 1135 * info about terminated workers in the meantime. 1136 */ 1137 check_signals(); 1138 1139 if (FD_ISSET(proto_descriptor(cfg->hc_controlconn), &rfds)) 1140 control_handle(cfg); 1141 TAILQ_FOREACH(lst, &cfg->hc_listen, hl_next) { 1142 if (lst->hl_conn == NULL) 1143 continue; 1144 if (FD_ISSET(proto_descriptor(lst->hl_conn), &rfds)) 1145 listen_accept(lst); 1146 } 1147 TAILQ_FOREACH(res, &cfg->hc_resources, hr_next) { 1148 if (res->hr_event == NULL) 1149 continue; 1150 if (FD_ISSET(proto_descriptor(res->hr_event), &rfds)) { 1151 if (event_recv(res) == 0) 1152 continue; 1153 /* The worker process exited? */ 1154 proto_close(res->hr_event); 1155 res->hr_event = NULL; 1156 if (res->hr_conn != NULL) { 1157 proto_close(res->hr_conn); 1158 res->hr_conn = NULL; 1159 } 1160 continue; 1161 } 1162 if (res->hr_role == HAST_ROLE_PRIMARY) { 1163 PJDLOG_ASSERT(res->hr_conn != NULL); 1164 if (FD_ISSET(proto_descriptor(res->hr_conn), 1165 &rfds)) { 1166 connection_migrate(res); 1167 } 1168 } else { 1169 PJDLOG_ASSERT(res->hr_conn == NULL); 1170 } 1171 } 1172 } 1173} 1174 1175static void 1176dummy_sighandler(int sig __unused) 1177{ 1178 /* Nothing to do. */ 1179} 1180 1181int 1182main(int argc, char *argv[]) 1183{ 1184 struct hastd_listen *lst; 1185 pid_t otherpid; 1186 int debuglevel; 1187 sigset_t mask; 1188 1189 foreground = false; 1190 debuglevel = 0; 1191 1192 for (;;) { 1193 int ch; 1194 1195 ch = getopt(argc, argv, "c:dFhP:"); 1196 if (ch == -1) 1197 break; 1198 switch (ch) { 1199 case 'c': 1200 cfgpath = optarg; 1201 break; 1202 case 'd': 1203 debuglevel++; 1204 break; 1205 case 'F': 1206 foreground = true; 1207 break; 1208 case 'P': 1209 pidfile = optarg; 1210 break; 1211 case 'h': 1212 default: 1213 usage(); 1214 } 1215 } 1216 argc -= optind; 1217 argv += optind; 1218 1219 pjdlog_init(PJDLOG_MODE_STD); 1220 pjdlog_debug_set(debuglevel); 1221 1222 closefrom(MAX(MAX(STDIN_FILENO, STDOUT_FILENO), STDERR_FILENO) + 1); 1223 g_gate_load(); 1224 1225 /* 1226 * When path to the configuration file is relative, obtain full path, 1227 * so we can always find the file, even after daemonizing and changing 1228 * working directory to /. 1229 */ 1230 if (cfgpath[0] != '/') { 1231 const char *newcfgpath; 1232 1233 newcfgpath = realpath(cfgpath, NULL); 1234 if (newcfgpath == NULL) { 1235 pjdlog_exit(EX_CONFIG, 1236 "Unable to obtain full path of %s", cfgpath); 1237 } 1238 cfgpath = newcfgpath; 1239 } 1240 1241 cfg = yy_config_parse(cfgpath, true); 1242 PJDLOG_ASSERT(cfg != NULL); 1243 1244 if (pidfile != NULL) { 1245 if (strlcpy(cfg->hc_pidfile, pidfile, 1246 sizeof(cfg->hc_pidfile)) >= sizeof(cfg->hc_pidfile)) { 1247 pjdlog_exitx(EX_CONFIG, "Pidfile path is too long."); 1248 } 1249 } 1250 1251 if (pidfile != NULL || !foreground) { 1252 pfh = pidfile_open(cfg->hc_pidfile, 0600, &otherpid); 1253 if (pfh == NULL) { 1254 if (errno == EEXIST) { 1255 pjdlog_exitx(EX_TEMPFAIL, 1256 "Another hastd is already running, pidfile: %s, pid: %jd.", 1257 cfg->hc_pidfile, (intmax_t)otherpid); 1258 } 1259 /* 1260 * If we cannot create pidfile for other reasons, 1261 * only warn. 1262 */ 1263 pjdlog_errno(LOG_WARNING, 1264 "Unable to open or create pidfile %s", 1265 cfg->hc_pidfile); 1266 } 1267 } 1268 1269 /* 1270 * Restore default actions for interesting signals in case parent 1271 * process (like init(8)) decided to ignore some of them (like SIGHUP). 1272 */ 1273 PJDLOG_VERIFY(signal(SIGHUP, SIG_DFL) != SIG_ERR); 1274 PJDLOG_VERIFY(signal(SIGINT, SIG_DFL) != SIG_ERR); 1275 PJDLOG_VERIFY(signal(SIGTERM, SIG_DFL) != SIG_ERR); 1276 /* 1277 * Because SIGCHLD is ignored by default, setup dummy handler for it, 1278 * so we can mask it. 1279 */ 1280 PJDLOG_VERIFY(signal(SIGCHLD, dummy_sighandler) != SIG_ERR); 1281 1282 PJDLOG_VERIFY(sigemptyset(&mask) == 0); 1283 PJDLOG_VERIFY(sigaddset(&mask, SIGHUP) == 0); 1284 PJDLOG_VERIFY(sigaddset(&mask, SIGINT) == 0); 1285 PJDLOG_VERIFY(sigaddset(&mask, SIGTERM) == 0); 1286 PJDLOG_VERIFY(sigaddset(&mask, SIGCHLD) == 0); 1287 PJDLOG_VERIFY(sigprocmask(SIG_SETMASK, &mask, NULL) == 0); 1288 1289 /* Listen on control address. */ 1290 if (proto_server(cfg->hc_controladdr, &cfg->hc_controlconn) == -1) { 1291 KEEP_ERRNO((void)pidfile_remove(pfh)); 1292 pjdlog_exit(EX_OSERR, "Unable to listen on control address %s", 1293 cfg->hc_controladdr); 1294 } 1295 /* Listen for remote connections. */ 1296 TAILQ_FOREACH(lst, &cfg->hc_listen, hl_next) { 1297 if (proto_server(lst->hl_addr, &lst->hl_conn) == -1) { 1298 KEEP_ERRNO((void)pidfile_remove(pfh)); 1299 pjdlog_exit(EX_OSERR, "Unable to listen on address %s", 1300 lst->hl_addr); 1301 } 1302 } 1303 1304 if (!foreground) { 1305 if (daemon(0, 0) == -1) { 1306 KEEP_ERRNO((void)pidfile_remove(pfh)); 1307 pjdlog_exit(EX_OSERR, "Unable to daemonize"); 1308 } 1309 1310 /* Start logging to syslog. */ 1311 pjdlog_mode_set(PJDLOG_MODE_SYSLOG); 1312 } 1313 if (pidfile != NULL || !foreground) { 1314 /* Write PID to a file. */ 1315 if (pidfile_write(pfh) == -1) { 1316 pjdlog_errno(LOG_WARNING, 1317 "Unable to write PID to a file %s", 1318 cfg->hc_pidfile); 1319 } else { 1320 pjdlog_debug(1, "PID stored in %s.", cfg->hc_pidfile); 1321 } 1322 } 1323 1324 pjdlog_info("Started successfully, running protocol version %d.", 1325 HAST_PROTO_VERSION); 1326 1327 pjdlog_debug(1, "Listening on control address %s.", 1328 cfg->hc_controladdr); 1329 TAILQ_FOREACH(lst, &cfg->hc_listen, hl_next) 1330 pjdlog_info("Listening on address %s.", lst->hl_addr); 1331 1332 hook_init(); 1333 1334 main_loop(); 1335 1336 exit(0); 1337} 1338