hastd.c revision 229945
1/*- 2 * Copyright (c) 2009-2010 The FreeBSD Foundation 3 * Copyright (c) 2010-2011 Pawel Jakub Dawidek <pawel@dawidek.net> 4 * All rights reserved. 5 * 6 * This software was developed by Pawel Jakub Dawidek under sponsorship from 7 * the FreeBSD Foundation. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 31#include <sys/cdefs.h> 32__FBSDID("$FreeBSD: head/sbin/hastd/hastd.c 229945 2012-01-10 22:39:07Z pjd $"); 33 34#include <sys/param.h> 35#include <sys/linker.h> 36#include <sys/module.h> 37#include <sys/stat.h> 38#include <sys/wait.h> 39 40#include <err.h> 41#include <errno.h> 42#include <libutil.h> 43#include <signal.h> 44#include <stdbool.h> 45#include <stdio.h> 46#include <stdlib.h> 47#include <string.h> 48#include <sysexits.h> 49#include <time.h> 50#include <unistd.h> 51 52#include <activemap.h> 53#include <pjdlog.h> 54 55#include "control.h" 56#include "event.h" 57#include "hast.h" 58#include "hast_proto.h" 59#include "hastd.h" 60#include "hooks.h" 61#include "subr.h" 62 63/* Path to configuration file. */ 64const char *cfgpath = HAST_CONFIG; 65/* Hastd configuration. */ 66static struct hastd_config *cfg; 67/* Was SIGINT or SIGTERM signal received? */ 68bool sigexit_received = false; 69/* PID file handle. */ 70struct pidfh *pfh; 71/* Do we run in foreground? */ 72static bool foreground; 73 74/* How often check for hooks running for too long. */ 75#define REPORT_INTERVAL 5 76 77static void 78usage(void) 79{ 80 81 errx(EX_USAGE, "[-dFh] [-c config] [-P pidfile]"); 82} 83 84static void 85g_gate_load(void) 86{ 87 88 if (modfind("g_gate") == -1) { 89 /* Not present in kernel, try loading it. */ 90 if (kldload("geom_gate") == -1 || modfind("g_gate") == -1) { 91 if (errno != EEXIST) { 92 pjdlog_exit(EX_OSERR, 93 "Unable to load geom_gate module"); 94 } 95 } 96 } 97} 98 99void 100descriptors_cleanup(struct hast_resource *res) 101{ 102 struct hast_resource *tres; 103 struct hastd_listen *lst; 104 105 TAILQ_FOREACH(tres, &cfg->hc_resources, hr_next) { 106 if (tres == res) { 107 PJDLOG_VERIFY(res->hr_role == HAST_ROLE_SECONDARY || 108 (res->hr_remotein == NULL && 109 res->hr_remoteout == NULL)); 110 continue; 111 } 112 if (tres->hr_remotein != NULL) 113 proto_close(tres->hr_remotein); 114 if (tres->hr_remoteout != NULL) 115 proto_close(tres->hr_remoteout); 116 if (tres->hr_ctrl != NULL) 117 proto_close(tres->hr_ctrl); 118 if (tres->hr_event != NULL) 119 proto_close(tres->hr_event); 120 if (tres->hr_conn != NULL) 121 proto_close(tres->hr_conn); 122 } 123 if (cfg->hc_controlin != NULL) 124 proto_close(cfg->hc_controlin); 125 proto_close(cfg->hc_controlconn); 126 TAILQ_FOREACH(lst, &cfg->hc_listen, hl_next) { 127 if (lst->hl_conn != NULL) 128 proto_close(lst->hl_conn); 129 } 130 (void)pidfile_close(pfh); 131 hook_fini(); 132 pjdlog_fini(); 133} 134 135static const char * 136dtype2str(mode_t mode) 137{ 138 139 if (S_ISBLK(mode)) 140 return ("block device"); 141 else if (S_ISCHR(mode)) 142 return ("character device"); 143 else if (S_ISDIR(mode)) 144 return ("directory"); 145 else if (S_ISFIFO(mode)) 146 return ("pipe or FIFO"); 147 else if (S_ISLNK(mode)) 148 return ("symbolic link"); 149 else if (S_ISREG(mode)) 150 return ("regular file"); 151 else if (S_ISSOCK(mode)) 152 return ("socket"); 153 else if (S_ISWHT(mode)) 154 return ("whiteout"); 155 else 156 return ("unknown"); 157} 158 159void 160descriptors_assert(const struct hast_resource *res, int pjdlogmode) 161{ 162 char msg[256]; 163 struct stat sb; 164 long maxfd; 165 bool isopen; 166 mode_t mode; 167 int fd; 168 169 /* 170 * At this point descriptor to syslog socket is closed, so if we want 171 * to log assertion message, we have to first store it in 'msg' local 172 * buffer and then open syslog socket and log it. 173 */ 174 msg[0] = '\0'; 175 176 maxfd = sysconf(_SC_OPEN_MAX); 177 if (maxfd == -1) { 178 pjdlog_init(pjdlogmode); 179 pjdlog_prefix_set("[%s] (%s) ", res->hr_name, 180 role2str(res->hr_role)); 181 pjdlog_errno(LOG_WARNING, "sysconf(_SC_OPEN_MAX) failed"); 182 pjdlog_fini(); 183 maxfd = 16384; 184 } 185 for (fd = 0; fd <= maxfd; fd++) { 186 if (fstat(fd, &sb) == 0) { 187 isopen = true; 188 mode = sb.st_mode; 189 } else if (errno == EBADF) { 190 isopen = false; 191 mode = 0; 192 } else { 193 (void)snprintf(msg, sizeof(msg), 194 "Unable to fstat descriptor %d: %s", fd, 195 strerror(errno)); 196 break; 197 } 198 if (fd == STDIN_FILENO || fd == STDOUT_FILENO || 199 fd == STDERR_FILENO) { 200 if (!isopen) { 201 (void)snprintf(msg, sizeof(msg), 202 "Descriptor %d (%s) is closed, but should be open.", 203 fd, (fd == STDIN_FILENO ? "stdin" : 204 (fd == STDOUT_FILENO ? "stdout" : "stderr"))); 205 break; 206 } 207 } else if (fd == proto_descriptor(res->hr_event)) { 208 if (!isopen) { 209 (void)snprintf(msg, sizeof(msg), 210 "Descriptor %d (event) is closed, but should be open.", 211 fd); 212 break; 213 } 214 if (!S_ISSOCK(mode)) { 215 (void)snprintf(msg, sizeof(msg), 216 "Descriptor %d (event) is %s, but should be %s.", 217 fd, dtype2str(mode), dtype2str(S_IFSOCK)); 218 break; 219 } 220 } else if (fd == proto_descriptor(res->hr_ctrl)) { 221 if (!isopen) { 222 (void)snprintf(msg, sizeof(msg), 223 "Descriptor %d (ctrl) is closed, but should be open.", 224 fd); 225 break; 226 } 227 if (!S_ISSOCK(mode)) { 228 (void)snprintf(msg, sizeof(msg), 229 "Descriptor %d (ctrl) is %s, but should be %s.", 230 fd, dtype2str(mode), dtype2str(S_IFSOCK)); 231 break; 232 } 233 } else if (res->hr_role == HAST_ROLE_PRIMARY && 234 fd == proto_descriptor(res->hr_conn)) { 235 if (!isopen) { 236 (void)snprintf(msg, sizeof(msg), 237 "Descriptor %d (conn) is closed, but should be open.", 238 fd); 239 break; 240 } 241 if (!S_ISSOCK(mode)) { 242 (void)snprintf(msg, sizeof(msg), 243 "Descriptor %d (conn) is %s, but should be %s.", 244 fd, dtype2str(mode), dtype2str(S_IFSOCK)); 245 break; 246 } 247 } else if (res->hr_role == HAST_ROLE_SECONDARY && 248 res->hr_conn != NULL && 249 fd == proto_descriptor(res->hr_conn)) { 250 if (isopen) { 251 (void)snprintf(msg, sizeof(msg), 252 "Descriptor %d (conn) is open, but should be closed.", 253 fd); 254 break; 255 } 256 } else if (res->hr_role == HAST_ROLE_SECONDARY && 257 fd == proto_descriptor(res->hr_remotein)) { 258 if (!isopen) { 259 (void)snprintf(msg, sizeof(msg), 260 "Descriptor %d (remote in) is closed, but should be open.", 261 fd); 262 break; 263 } 264 if (!S_ISSOCK(mode)) { 265 (void)snprintf(msg, sizeof(msg), 266 "Descriptor %d (remote in) is %s, but should be %s.", 267 fd, dtype2str(mode), dtype2str(S_IFSOCK)); 268 break; 269 } 270 } else if (res->hr_role == HAST_ROLE_SECONDARY && 271 fd == proto_descriptor(res->hr_remoteout)) { 272 if (!isopen) { 273 (void)snprintf(msg, sizeof(msg), 274 "Descriptor %d (remote out) is closed, but should be open.", 275 fd); 276 break; 277 } 278 if (!S_ISSOCK(mode)) { 279 (void)snprintf(msg, sizeof(msg), 280 "Descriptor %d (remote out) is %s, but should be %s.", 281 fd, dtype2str(mode), dtype2str(S_IFSOCK)); 282 break; 283 } 284 } else { 285 if (isopen) { 286 (void)snprintf(msg, sizeof(msg), 287 "Descriptor %d is open (%s), but should be closed.", 288 fd, dtype2str(mode)); 289 break; 290 } 291 } 292 } 293 if (msg[0] != '\0') { 294 pjdlog_init(pjdlogmode); 295 pjdlog_prefix_set("[%s] (%s) ", res->hr_name, 296 role2str(res->hr_role)); 297 PJDLOG_ABORT("%s", msg); 298 } 299} 300 301static void 302child_exit_log(unsigned int pid, int status) 303{ 304 305 if (WIFEXITED(status) && WEXITSTATUS(status) == 0) { 306 pjdlog_debug(1, "Worker process exited gracefully (pid=%u).", 307 pid); 308 } else if (WIFSIGNALED(status)) { 309 pjdlog_error("Worker process killed (pid=%u, signal=%d).", 310 pid, WTERMSIG(status)); 311 } else { 312 pjdlog_error("Worker process exited ungracefully (pid=%u, exitcode=%d).", 313 pid, WIFEXITED(status) ? WEXITSTATUS(status) : -1); 314 } 315} 316 317static void 318child_exit(void) 319{ 320 struct hast_resource *res; 321 int status; 322 pid_t pid; 323 324 while ((pid = wait3(&status, WNOHANG, NULL)) > 0) { 325 /* Find resource related to the process that just exited. */ 326 TAILQ_FOREACH(res, &cfg->hc_resources, hr_next) { 327 if (pid == res->hr_workerpid) 328 break; 329 } 330 if (res == NULL) { 331 /* 332 * This can happen when new connection arrives and we 333 * cancel child responsible for the old one or if this 334 * was hook which we executed. 335 */ 336 hook_check_one(pid, status); 337 continue; 338 } 339 pjdlog_prefix_set("[%s] (%s) ", res->hr_name, 340 role2str(res->hr_role)); 341 child_exit_log(pid, status); 342 child_cleanup(res); 343 if (res->hr_role == HAST_ROLE_PRIMARY) { 344 /* 345 * Restart child process if it was killed by signal 346 * or exited because of temporary problem. 347 */ 348 if (WIFSIGNALED(status) || 349 (WIFEXITED(status) && 350 WEXITSTATUS(status) == EX_TEMPFAIL)) { 351 sleep(1); 352 pjdlog_info("Restarting worker process."); 353 hastd_primary(res); 354 } else { 355 res->hr_role = HAST_ROLE_INIT; 356 pjdlog_info("Changing resource role back to %s.", 357 role2str(res->hr_role)); 358 } 359 } 360 pjdlog_prefix_set("%s", ""); 361 } 362} 363 364static bool 365resource_needs_restart(const struct hast_resource *res0, 366 const struct hast_resource *res1) 367{ 368 369 PJDLOG_ASSERT(strcmp(res0->hr_name, res1->hr_name) == 0); 370 371 if (strcmp(res0->hr_provname, res1->hr_provname) != 0) 372 return (true); 373 if (strcmp(res0->hr_localpath, res1->hr_localpath) != 0) 374 return (true); 375 if (res0->hr_role == HAST_ROLE_INIT || 376 res0->hr_role == HAST_ROLE_SECONDARY) { 377 if (strcmp(res0->hr_remoteaddr, res1->hr_remoteaddr) != 0) 378 return (true); 379 if (strcmp(res0->hr_sourceaddr, res1->hr_sourceaddr) != 0) 380 return (true); 381 if (res0->hr_replication != res1->hr_replication) 382 return (true); 383 if (res0->hr_checksum != res1->hr_checksum) 384 return (true); 385 if (res0->hr_compression != res1->hr_compression) 386 return (true); 387 if (res0->hr_timeout != res1->hr_timeout) 388 return (true); 389 if (strcmp(res0->hr_exec, res1->hr_exec) != 0) 390 return (true); 391 /* 392 * When metaflush has changed we don't really need restart, 393 * but it is just easier this way. 394 */ 395 if (res0->hr_metaflush != res1->hr_metaflush) 396 return (true); 397 } 398 return (false); 399} 400 401static bool 402resource_needs_reload(const struct hast_resource *res0, 403 const struct hast_resource *res1) 404{ 405 406 PJDLOG_ASSERT(strcmp(res0->hr_name, res1->hr_name) == 0); 407 PJDLOG_ASSERT(strcmp(res0->hr_provname, res1->hr_provname) == 0); 408 PJDLOG_ASSERT(strcmp(res0->hr_localpath, res1->hr_localpath) == 0); 409 410 if (res0->hr_role != HAST_ROLE_PRIMARY) 411 return (false); 412 413 if (strcmp(res0->hr_remoteaddr, res1->hr_remoteaddr) != 0) 414 return (true); 415 if (strcmp(res0->hr_sourceaddr, res1->hr_sourceaddr) != 0) 416 return (true); 417 if (res0->hr_replication != res1->hr_replication) 418 return (true); 419 if (res0->hr_checksum != res1->hr_checksum) 420 return (true); 421 if (res0->hr_compression != res1->hr_compression) 422 return (true); 423 if (res0->hr_timeout != res1->hr_timeout) 424 return (true); 425 if (strcmp(res0->hr_exec, res1->hr_exec) != 0) 426 return (true); 427 if (res0->hr_metaflush != res1->hr_metaflush) 428 return (true); 429 return (false); 430} 431 432static void 433resource_reload(const struct hast_resource *res) 434{ 435 struct nv *nvin, *nvout; 436 int error; 437 438 PJDLOG_ASSERT(res->hr_role == HAST_ROLE_PRIMARY); 439 440 nvout = nv_alloc(); 441 nv_add_uint8(nvout, CONTROL_RELOAD, "cmd"); 442 nv_add_string(nvout, res->hr_remoteaddr, "remoteaddr"); 443 nv_add_string(nvout, res->hr_sourceaddr, "sourceaddr"); 444 nv_add_int32(nvout, (int32_t)res->hr_replication, "replication"); 445 nv_add_int32(nvout, (int32_t)res->hr_checksum, "checksum"); 446 nv_add_int32(nvout, (int32_t)res->hr_compression, "compression"); 447 nv_add_int32(nvout, (int32_t)res->hr_timeout, "timeout"); 448 nv_add_string(nvout, res->hr_exec, "exec"); 449 nv_add_int32(nvout, (int32_t)res->hr_metaflush, "metaflush"); 450 if (nv_error(nvout) != 0) { 451 nv_free(nvout); 452 pjdlog_error("Unable to allocate header for reload message."); 453 return; 454 } 455 if (hast_proto_send(res, res->hr_ctrl, nvout, NULL, 0) == -1) { 456 pjdlog_errno(LOG_ERR, "Unable to send reload message"); 457 nv_free(nvout); 458 return; 459 } 460 nv_free(nvout); 461 462 /* Receive response. */ 463 if (hast_proto_recv_hdr(res->hr_ctrl, &nvin) == -1) { 464 pjdlog_errno(LOG_ERR, "Unable to receive reload reply"); 465 return; 466 } 467 error = nv_get_int16(nvin, "error"); 468 nv_free(nvin); 469 if (error != 0) { 470 pjdlog_common(LOG_ERR, 0, error, "Reload failed"); 471 return; 472 } 473} 474 475static void 476hastd_reload(void) 477{ 478 struct hastd_config *newcfg; 479 struct hast_resource *nres, *cres, *tres; 480 struct hastd_listen *nlst, *clst; 481 struct pidfh *newpfh; 482 unsigned int nlisten; 483 uint8_t role; 484 pid_t otherpid; 485 486 pjdlog_info("Reloading configuration..."); 487 488 newpfh = NULL; 489 490 newcfg = yy_config_parse(cfgpath, false); 491 if (newcfg == NULL) 492 goto failed; 493 494 /* 495 * Check if control address has changed. 496 */ 497 if (strcmp(cfg->hc_controladdr, newcfg->hc_controladdr) != 0) { 498 if (proto_server(newcfg->hc_controladdr, 499 &newcfg->hc_controlconn) == -1) { 500 pjdlog_errno(LOG_ERR, 501 "Unable to listen on control address %s", 502 newcfg->hc_controladdr); 503 goto failed; 504 } 505 } 506 /* 507 * Check if any listen address has changed. 508 */ 509 nlisten = 0; 510 TAILQ_FOREACH(nlst, &newcfg->hc_listen, hl_next) { 511 TAILQ_FOREACH(clst, &cfg->hc_listen, hl_next) { 512 if (strcmp(nlst->hl_addr, clst->hl_addr) == 0) 513 break; 514 } 515 if (clst != NULL && clst->hl_conn != NULL) { 516 pjdlog_info("Keep listening on address %s.", 517 nlst->hl_addr); 518 nlst->hl_conn = clst->hl_conn; 519 nlisten++; 520 } else if (proto_server(nlst->hl_addr, &nlst->hl_conn) == 0) { 521 pjdlog_info("Listening on new address %s.", 522 nlst->hl_addr); 523 nlisten++; 524 } else { 525 pjdlog_errno(LOG_WARNING, 526 "Unable to listen on address %s", nlst->hl_addr); 527 } 528 } 529 if (nlisten == 0) { 530 pjdlog_error("No addresses to listen on."); 531 goto failed; 532 } 533 /* 534 * Check if pidfile's path has changed. 535 */ 536 if (!foreground && strcmp(cfg->hc_pidfile, newcfg->hc_pidfile) != 0) { 537 newpfh = pidfile_open(newcfg->hc_pidfile, 0600, &otherpid); 538 if (newpfh == NULL) { 539 if (errno == EEXIST) { 540 pjdlog_errno(LOG_WARNING, 541 "Another hastd is already running, pidfile: %s, pid: %jd.", 542 newcfg->hc_pidfile, (intmax_t)otherpid); 543 } else { 544 pjdlog_errno(LOG_WARNING, 545 "Unable to open or create pidfile %s", 546 newcfg->hc_pidfile); 547 } 548 } else if (pidfile_write(newpfh) == -1) { 549 /* Write PID to a file. */ 550 pjdlog_errno(LOG_WARNING, 551 "Unable to write PID to file %s", 552 newcfg->hc_pidfile); 553 } else { 554 pjdlog_debug(1, "PID stored in %s.", 555 newcfg->hc_pidfile); 556 } 557 } 558 559 /* No failures from now on. */ 560 561 /* 562 * Switch to new control socket. 563 */ 564 if (newcfg->hc_controlconn != NULL) { 565 pjdlog_info("Control socket changed from %s to %s.", 566 cfg->hc_controladdr, newcfg->hc_controladdr); 567 proto_close(cfg->hc_controlconn); 568 cfg->hc_controlconn = newcfg->hc_controlconn; 569 newcfg->hc_controlconn = NULL; 570 strlcpy(cfg->hc_controladdr, newcfg->hc_controladdr, 571 sizeof(cfg->hc_controladdr)); 572 } 573 /* 574 * Switch to new pidfile. 575 */ 576 (void)pidfile_remove(pfh); 577 pfh = newpfh; 578 (void)strlcpy(cfg->hc_pidfile, newcfg->hc_pidfile, 579 sizeof(cfg->hc_pidfile)); 580 /* 581 * Switch to new listen addresses. Close all that were removed. 582 */ 583 while ((clst = TAILQ_FIRST(&cfg->hc_listen)) != NULL) { 584 TAILQ_FOREACH(nlst, &newcfg->hc_listen, hl_next) { 585 if (strcmp(nlst->hl_addr, clst->hl_addr) == 0) 586 break; 587 } 588 if (nlst == NULL && clst->hl_conn != NULL) { 589 proto_close(clst->hl_conn); 590 pjdlog_info("No longer listening on address %s.", 591 clst->hl_addr); 592 } 593 TAILQ_REMOVE(&cfg->hc_listen, clst, hl_next); 594 free(clst); 595 } 596 TAILQ_CONCAT(&cfg->hc_listen, &newcfg->hc_listen, hl_next); 597 598 /* 599 * Stop and remove resources that were removed from the configuration. 600 */ 601 TAILQ_FOREACH_SAFE(cres, &cfg->hc_resources, hr_next, tres) { 602 TAILQ_FOREACH(nres, &newcfg->hc_resources, hr_next) { 603 if (strcmp(cres->hr_name, nres->hr_name) == 0) 604 break; 605 } 606 if (nres == NULL) { 607 control_set_role(cres, HAST_ROLE_INIT); 608 TAILQ_REMOVE(&cfg->hc_resources, cres, hr_next); 609 pjdlog_info("Resource %s removed.", cres->hr_name); 610 free(cres); 611 } 612 } 613 /* 614 * Move new resources to the current configuration. 615 */ 616 TAILQ_FOREACH_SAFE(nres, &newcfg->hc_resources, hr_next, tres) { 617 TAILQ_FOREACH(cres, &cfg->hc_resources, hr_next) { 618 if (strcmp(cres->hr_name, nres->hr_name) == 0) 619 break; 620 } 621 if (cres == NULL) { 622 TAILQ_REMOVE(&newcfg->hc_resources, nres, hr_next); 623 TAILQ_INSERT_TAIL(&cfg->hc_resources, nres, hr_next); 624 pjdlog_info("Resource %s added.", nres->hr_name); 625 } 626 } 627 /* 628 * Deal with modified resources. 629 * Depending on what has changed exactly we might want to perform 630 * different actions. 631 * 632 * We do full resource restart in the following situations: 633 * Resource role is INIT or SECONDARY. 634 * Resource role is PRIMARY and path to local component or provider 635 * name has changed. 636 * In case of PRIMARY, the worker process will be killed and restarted, 637 * which also means removing /dev/hast/<name> provider and 638 * recreating it. 639 * 640 * We do just reload (send SIGHUP to worker process) if we act as 641 * PRIMARY, but only if remote address, source address, replication 642 * mode, timeout, execution path or metaflush has changed. 643 * For those, there is no need to restart worker process. 644 * If PRIMARY receives SIGHUP, it will reconnect if remote address or 645 * source address has changed or it will set new timeout if only timeout 646 * has changed or it will update metaflush if only metaflush has 647 * changed. 648 */ 649 TAILQ_FOREACH_SAFE(nres, &newcfg->hc_resources, hr_next, tres) { 650 TAILQ_FOREACH(cres, &cfg->hc_resources, hr_next) { 651 if (strcmp(cres->hr_name, nres->hr_name) == 0) 652 break; 653 } 654 PJDLOG_ASSERT(cres != NULL); 655 if (resource_needs_restart(cres, nres)) { 656 pjdlog_info("Resource %s configuration was modified, restarting it.", 657 cres->hr_name); 658 role = cres->hr_role; 659 control_set_role(cres, HAST_ROLE_INIT); 660 TAILQ_REMOVE(&cfg->hc_resources, cres, hr_next); 661 free(cres); 662 TAILQ_REMOVE(&newcfg->hc_resources, nres, hr_next); 663 TAILQ_INSERT_TAIL(&cfg->hc_resources, nres, hr_next); 664 control_set_role(nres, role); 665 } else if (resource_needs_reload(cres, nres)) { 666 pjdlog_info("Resource %s configuration was modified, reloading it.", 667 cres->hr_name); 668 strlcpy(cres->hr_remoteaddr, nres->hr_remoteaddr, 669 sizeof(cres->hr_remoteaddr)); 670 strlcpy(cres->hr_sourceaddr, nres->hr_sourceaddr, 671 sizeof(cres->hr_sourceaddr)); 672 cres->hr_replication = nres->hr_replication; 673 cres->hr_checksum = nres->hr_checksum; 674 cres->hr_compression = nres->hr_compression; 675 cres->hr_timeout = nres->hr_timeout; 676 strlcpy(cres->hr_exec, nres->hr_exec, 677 sizeof(cres->hr_exec)); 678 cres->hr_metaflush = nres->hr_metaflush; 679 if (cres->hr_workerpid != 0) 680 resource_reload(cres); 681 } 682 } 683 684 yy_config_free(newcfg); 685 pjdlog_info("Configuration reloaded successfully."); 686 return; 687failed: 688 if (newcfg != NULL) { 689 if (newcfg->hc_controlconn != NULL) 690 proto_close(newcfg->hc_controlconn); 691 while ((nlst = TAILQ_FIRST(&newcfg->hc_listen)) != NULL) { 692 if (nlst->hl_conn != NULL) { 693 TAILQ_FOREACH(clst, &cfg->hc_listen, hl_next) { 694 if (strcmp(nlst->hl_addr, 695 clst->hl_addr) == 0) { 696 break; 697 } 698 } 699 if (clst == NULL || clst->hl_conn == NULL) 700 proto_close(nlst->hl_conn); 701 } 702 TAILQ_REMOVE(&newcfg->hc_listen, nlst, hl_next); 703 free(nlst); 704 } 705 yy_config_free(newcfg); 706 } 707 if (newpfh != NULL) 708 (void)pidfile_remove(newpfh); 709 pjdlog_warning("Configuration not reloaded."); 710} 711 712static void 713terminate_workers(void) 714{ 715 struct hast_resource *res; 716 717 pjdlog_info("Termination signal received, exiting."); 718 TAILQ_FOREACH(res, &cfg->hc_resources, hr_next) { 719 if (res->hr_workerpid == 0) 720 continue; 721 pjdlog_info("Terminating worker process (resource=%s, role=%s, pid=%u).", 722 res->hr_name, role2str(res->hr_role), res->hr_workerpid); 723 if (kill(res->hr_workerpid, SIGTERM) == 0) 724 continue; 725 pjdlog_errno(LOG_WARNING, 726 "Unable to send signal to worker process (resource=%s, role=%s, pid=%u).", 727 res->hr_name, role2str(res->hr_role), res->hr_workerpid); 728 } 729} 730 731static void 732listen_accept(struct hastd_listen *lst) 733{ 734 struct hast_resource *res; 735 struct proto_conn *conn; 736 struct nv *nvin, *nvout, *nverr; 737 const char *resname; 738 const unsigned char *token; 739 char laddr[256], raddr[256]; 740 size_t size; 741 pid_t pid; 742 int status; 743 744 proto_local_address(lst->hl_conn, laddr, sizeof(laddr)); 745 pjdlog_debug(1, "Accepting connection to %s.", laddr); 746 747 if (proto_accept(lst->hl_conn, &conn) == -1) { 748 pjdlog_errno(LOG_ERR, "Unable to accept connection %s", laddr); 749 return; 750 } 751 752 proto_local_address(conn, laddr, sizeof(laddr)); 753 proto_remote_address(conn, raddr, sizeof(raddr)); 754 pjdlog_info("Connection from %s to %s.", raddr, laddr); 755 756 /* Error in setting timeout is not critical, but why should it fail? */ 757 if (proto_timeout(conn, HAST_TIMEOUT) == -1) 758 pjdlog_errno(LOG_WARNING, "Unable to set connection timeout"); 759 760 nvin = nvout = nverr = NULL; 761 762 /* 763 * Before receiving any data see if remote host have access to any 764 * resource. 765 */ 766 TAILQ_FOREACH(res, &cfg->hc_resources, hr_next) { 767 if (proto_address_match(conn, res->hr_remoteaddr)) 768 break; 769 } 770 if (res == NULL) { 771 pjdlog_error("Client %s isn't known.", raddr); 772 goto close; 773 } 774 /* Ok, remote host can access at least one resource. */ 775 776 if (hast_proto_recv_hdr(conn, &nvin) == -1) { 777 pjdlog_errno(LOG_ERR, "Unable to receive header from %s", 778 raddr); 779 goto close; 780 } 781 782 resname = nv_get_string(nvin, "resource"); 783 if (resname == NULL) { 784 pjdlog_error("No 'resource' field in the header received from %s.", 785 raddr); 786 goto close; 787 } 788 pjdlog_debug(2, "%s: resource=%s", raddr, resname); 789 token = nv_get_uint8_array(nvin, &size, "token"); 790 /* 791 * NULL token means that this is first connection. 792 */ 793 if (token != NULL && size != sizeof(res->hr_token)) { 794 pjdlog_error("Received token of invalid size from %s (expected %zu, got %zu).", 795 raddr, sizeof(res->hr_token), size); 796 goto close; 797 } 798 799 /* 800 * From now on we want to send errors to the remote node. 801 */ 802 nverr = nv_alloc(); 803 804 /* Find resource related to this connection. */ 805 TAILQ_FOREACH(res, &cfg->hc_resources, hr_next) { 806 if (strcmp(resname, res->hr_name) == 0) 807 break; 808 } 809 /* Have we found the resource? */ 810 if (res == NULL) { 811 pjdlog_error("No resource '%s' as requested by %s.", 812 resname, raddr); 813 nv_add_stringf(nverr, "errmsg", "Resource not configured."); 814 goto fail; 815 } 816 817 /* Now that we know resource name setup log prefix. */ 818 pjdlog_prefix_set("[%s] (%s) ", res->hr_name, role2str(res->hr_role)); 819 820 /* Does the remote host have access to this resource? */ 821 if (!proto_address_match(conn, res->hr_remoteaddr)) { 822 pjdlog_error("Client %s has no access to the resource.", raddr); 823 nv_add_stringf(nverr, "errmsg", "No access to the resource."); 824 goto fail; 825 } 826 /* Is the resource marked as secondary? */ 827 if (res->hr_role != HAST_ROLE_SECONDARY) { 828 pjdlog_warning("We act as %s for the resource and not as %s as requested by %s.", 829 role2str(res->hr_role), role2str(HAST_ROLE_SECONDARY), 830 raddr); 831 nv_add_stringf(nverr, "errmsg", 832 "Remote node acts as %s for the resource and not as %s.", 833 role2str(res->hr_role), role2str(HAST_ROLE_SECONDARY)); 834 if (res->hr_role == HAST_ROLE_PRIMARY) { 835 /* 836 * If we act as primary request the other side to wait 837 * for us a bit, as we might be finishing cleanups. 838 */ 839 nv_add_uint8(nverr, 1, "wait"); 840 } 841 goto fail; 842 } 843 /* Does token (if exists) match? */ 844 if (token != NULL && memcmp(token, res->hr_token, 845 sizeof(res->hr_token)) != 0) { 846 pjdlog_error("Token received from %s doesn't match.", raddr); 847 nv_add_stringf(nverr, "errmsg", "Token doesn't match."); 848 goto fail; 849 } 850 /* 851 * If there is no token, but we have half-open connection 852 * (only remotein) or full connection (worker process is running) 853 * we have to cancel those and accept the new connection. 854 */ 855 if (token == NULL) { 856 PJDLOG_ASSERT(res->hr_remoteout == NULL); 857 pjdlog_debug(1, "Initial connection from %s.", raddr); 858 if (res->hr_workerpid != 0) { 859 PJDLOG_ASSERT(res->hr_remotein == NULL); 860 pjdlog_debug(1, 861 "Worker process exists (pid=%u), stopping it.", 862 (unsigned int)res->hr_workerpid); 863 /* Stop child process. */ 864 if (kill(res->hr_workerpid, SIGINT) == -1) { 865 pjdlog_errno(LOG_ERR, 866 "Unable to stop worker process (pid=%u)", 867 (unsigned int)res->hr_workerpid); 868 /* 869 * Other than logging the problem we 870 * ignore it - nothing smart to do. 871 */ 872 } 873 /* Wait for it to exit. */ 874 else if ((pid = waitpid(res->hr_workerpid, 875 &status, 0)) != res->hr_workerpid) { 876 /* We can only log the problem. */ 877 pjdlog_errno(LOG_ERR, 878 "Waiting for worker process (pid=%u) failed", 879 (unsigned int)res->hr_workerpid); 880 } else { 881 child_exit_log(res->hr_workerpid, status); 882 } 883 child_cleanup(res); 884 } else if (res->hr_remotein != NULL) { 885 char oaddr[256]; 886 887 proto_remote_address(res->hr_remotein, oaddr, 888 sizeof(oaddr)); 889 pjdlog_debug(1, 890 "Canceling half-open connection from %s on connection from %s.", 891 oaddr, raddr); 892 proto_close(res->hr_remotein); 893 res->hr_remotein = NULL; 894 } 895 } 896 897 /* 898 * Checks and cleanups are done. 899 */ 900 901 if (token == NULL) { 902 arc4random_buf(res->hr_token, sizeof(res->hr_token)); 903 nvout = nv_alloc(); 904 nv_add_uint8_array(nvout, res->hr_token, 905 sizeof(res->hr_token), "token"); 906 if (nv_error(nvout) != 0) { 907 pjdlog_common(LOG_ERR, 0, nv_error(nvout), 908 "Unable to prepare return header for %s", raddr); 909 nv_add_stringf(nverr, "errmsg", 910 "Remote node was unable to prepare return header: %s.", 911 strerror(nv_error(nvout))); 912 goto fail; 913 } 914 if (hast_proto_send(NULL, conn, nvout, NULL, 0) == -1) { 915 int error = errno; 916 917 pjdlog_errno(LOG_ERR, "Unable to send response to %s", 918 raddr); 919 nv_add_stringf(nverr, "errmsg", 920 "Remote node was unable to send response: %s.", 921 strerror(error)); 922 goto fail; 923 } 924 res->hr_remotein = conn; 925 pjdlog_debug(1, "Incoming connection from %s configured.", 926 raddr); 927 } else { 928 res->hr_remoteout = conn; 929 pjdlog_debug(1, "Outgoing connection to %s configured.", raddr); 930 hastd_secondary(res, nvin); 931 } 932 nv_free(nvin); 933 nv_free(nvout); 934 nv_free(nverr); 935 pjdlog_prefix_set("%s", ""); 936 return; 937fail: 938 if (nv_error(nverr) != 0) { 939 pjdlog_common(LOG_ERR, 0, nv_error(nverr), 940 "Unable to prepare error header for %s", raddr); 941 goto close; 942 } 943 if (hast_proto_send(NULL, conn, nverr, NULL, 0) == -1) { 944 pjdlog_errno(LOG_ERR, "Unable to send error to %s", raddr); 945 goto close; 946 } 947close: 948 if (nvin != NULL) 949 nv_free(nvin); 950 if (nvout != NULL) 951 nv_free(nvout); 952 if (nverr != NULL) 953 nv_free(nverr); 954 proto_close(conn); 955 pjdlog_prefix_set("%s", ""); 956} 957 958static void 959connection_migrate(struct hast_resource *res) 960{ 961 struct proto_conn *conn; 962 int16_t val = 0; 963 964 pjdlog_prefix_set("[%s] (%s) ", res->hr_name, role2str(res->hr_role)); 965 966 PJDLOG_ASSERT(res->hr_role == HAST_ROLE_PRIMARY); 967 968 if (proto_recv(res->hr_conn, &val, sizeof(val)) == -1) { 969 pjdlog_errno(LOG_WARNING, 970 "Unable to receive connection command"); 971 return; 972 } 973 if (proto_client(res->hr_sourceaddr[0] != '\0' ? res->hr_sourceaddr : NULL, 974 res->hr_remoteaddr, &conn) == -1) { 975 val = errno; 976 pjdlog_errno(LOG_WARNING, 977 "Unable to create outgoing connection to %s", 978 res->hr_remoteaddr); 979 goto out; 980 } 981 if (proto_connect(conn, -1) == -1) { 982 val = errno; 983 pjdlog_errno(LOG_WARNING, "Unable to connect to %s", 984 res->hr_remoteaddr); 985 proto_close(conn); 986 goto out; 987 } 988 val = 0; 989out: 990 if (proto_send(res->hr_conn, &val, sizeof(val)) == -1) { 991 pjdlog_errno(LOG_WARNING, 992 "Unable to send reply to connection request"); 993 } 994 if (val == 0 && proto_connection_send(res->hr_conn, conn) == -1) 995 pjdlog_errno(LOG_WARNING, "Unable to send connection"); 996 997 pjdlog_prefix_set("%s", ""); 998} 999 1000static void 1001check_signals(void) 1002{ 1003 struct timespec sigtimeout; 1004 sigset_t mask; 1005 int signo; 1006 1007 sigtimeout.tv_sec = 0; 1008 sigtimeout.tv_nsec = 0; 1009 1010 PJDLOG_VERIFY(sigemptyset(&mask) == 0); 1011 PJDLOG_VERIFY(sigaddset(&mask, SIGHUP) == 0); 1012 PJDLOG_VERIFY(sigaddset(&mask, SIGINT) == 0); 1013 PJDLOG_VERIFY(sigaddset(&mask, SIGTERM) == 0); 1014 PJDLOG_VERIFY(sigaddset(&mask, SIGCHLD) == 0); 1015 1016 while ((signo = sigtimedwait(&mask, NULL, &sigtimeout)) != -1) { 1017 switch (signo) { 1018 case SIGINT: 1019 case SIGTERM: 1020 sigexit_received = true; 1021 terminate_workers(); 1022 proto_close(cfg->hc_controlconn); 1023 exit(EX_OK); 1024 break; 1025 case SIGCHLD: 1026 child_exit(); 1027 break; 1028 case SIGHUP: 1029 hastd_reload(); 1030 break; 1031 default: 1032 PJDLOG_ABORT("Unexpected signal (%d).", signo); 1033 } 1034 } 1035} 1036 1037static void 1038main_loop(void) 1039{ 1040 struct hast_resource *res; 1041 struct hastd_listen *lst; 1042 struct timeval seltimeout; 1043 int fd, maxfd, ret; 1044 time_t lastcheck, now; 1045 fd_set rfds; 1046 1047 lastcheck = time(NULL); 1048 seltimeout.tv_sec = REPORT_INTERVAL; 1049 seltimeout.tv_usec = 0; 1050 1051 for (;;) { 1052 check_signals(); 1053 1054 /* Setup descriptors for select(2). */ 1055 FD_ZERO(&rfds); 1056 maxfd = fd = proto_descriptor(cfg->hc_controlconn); 1057 PJDLOG_ASSERT(fd >= 0); 1058 FD_SET(fd, &rfds); 1059 TAILQ_FOREACH(lst, &cfg->hc_listen, hl_next) { 1060 if (lst->hl_conn == NULL) 1061 continue; 1062 fd = proto_descriptor(lst->hl_conn); 1063 PJDLOG_ASSERT(fd >= 0); 1064 FD_SET(fd, &rfds); 1065 maxfd = fd > maxfd ? fd : maxfd; 1066 } 1067 TAILQ_FOREACH(res, &cfg->hc_resources, hr_next) { 1068 if (res->hr_event == NULL) 1069 continue; 1070 fd = proto_descriptor(res->hr_event); 1071 PJDLOG_ASSERT(fd >= 0); 1072 FD_SET(fd, &rfds); 1073 maxfd = fd > maxfd ? fd : maxfd; 1074 if (res->hr_role == HAST_ROLE_PRIMARY) { 1075 /* Only primary workers asks for connections. */ 1076 PJDLOG_ASSERT(res->hr_conn != NULL); 1077 fd = proto_descriptor(res->hr_conn); 1078 PJDLOG_ASSERT(fd >= 0); 1079 FD_SET(fd, &rfds); 1080 maxfd = fd > maxfd ? fd : maxfd; 1081 } else { 1082 PJDLOG_ASSERT(res->hr_conn == NULL); 1083 } 1084 } 1085 1086 PJDLOG_ASSERT(maxfd + 1 <= (int)FD_SETSIZE); 1087 ret = select(maxfd + 1, &rfds, NULL, NULL, &seltimeout); 1088 now = time(NULL); 1089 if (lastcheck + REPORT_INTERVAL <= now) { 1090 hook_check(); 1091 lastcheck = now; 1092 } 1093 if (ret == 0) { 1094 /* 1095 * select(2) timed out, so there should be no 1096 * descriptors to check. 1097 */ 1098 continue; 1099 } else if (ret == -1) { 1100 if (errno == EINTR) 1101 continue; 1102 KEEP_ERRNO((void)pidfile_remove(pfh)); 1103 pjdlog_exit(EX_OSERR, "select() failed"); 1104 } 1105 1106 /* 1107 * Check for signals before we do anything to update our 1108 * info about terminated workers in the meantime. 1109 */ 1110 check_signals(); 1111 1112 if (FD_ISSET(proto_descriptor(cfg->hc_controlconn), &rfds)) 1113 control_handle(cfg); 1114 TAILQ_FOREACH(lst, &cfg->hc_listen, hl_next) { 1115 if (lst->hl_conn == NULL) 1116 continue; 1117 if (FD_ISSET(proto_descriptor(lst->hl_conn), &rfds)) 1118 listen_accept(lst); 1119 } 1120 TAILQ_FOREACH(res, &cfg->hc_resources, hr_next) { 1121 if (res->hr_event == NULL) 1122 continue; 1123 if (FD_ISSET(proto_descriptor(res->hr_event), &rfds)) { 1124 if (event_recv(res) == 0) 1125 continue; 1126 /* The worker process exited? */ 1127 proto_close(res->hr_event); 1128 res->hr_event = NULL; 1129 if (res->hr_conn != NULL) { 1130 proto_close(res->hr_conn); 1131 res->hr_conn = NULL; 1132 } 1133 continue; 1134 } 1135 if (res->hr_role == HAST_ROLE_PRIMARY) { 1136 PJDLOG_ASSERT(res->hr_conn != NULL); 1137 if (FD_ISSET(proto_descriptor(res->hr_conn), 1138 &rfds)) { 1139 connection_migrate(res); 1140 } 1141 } else { 1142 PJDLOG_ASSERT(res->hr_conn == NULL); 1143 } 1144 } 1145 } 1146} 1147 1148static void 1149dummy_sighandler(int sig __unused) 1150{ 1151 /* Nothing to do. */ 1152} 1153 1154int 1155main(int argc, char *argv[]) 1156{ 1157 struct hastd_listen *lst; 1158 const char *pidfile; 1159 pid_t otherpid; 1160 int debuglevel; 1161 sigset_t mask; 1162 1163 foreground = false; 1164 debuglevel = 0; 1165 pidfile = NULL; 1166 1167 for (;;) { 1168 int ch; 1169 1170 ch = getopt(argc, argv, "c:dFhP:"); 1171 if (ch == -1) 1172 break; 1173 switch (ch) { 1174 case 'c': 1175 cfgpath = optarg; 1176 break; 1177 case 'd': 1178 debuglevel++; 1179 break; 1180 case 'F': 1181 foreground = true; 1182 break; 1183 case 'P': 1184 pidfile = optarg; 1185 break; 1186 case 'h': 1187 default: 1188 usage(); 1189 } 1190 } 1191 argc -= optind; 1192 argv += optind; 1193 1194 pjdlog_init(PJDLOG_MODE_STD); 1195 pjdlog_debug_set(debuglevel); 1196 1197 g_gate_load(); 1198 1199 /* 1200 * When path to the configuration file is relative, obtain full path, 1201 * so we can always find the file, even after daemonizing and changing 1202 * working directory to /. 1203 */ 1204 if (cfgpath[0] != '/') { 1205 const char *newcfgpath; 1206 1207 newcfgpath = realpath(cfgpath, NULL); 1208 if (newcfgpath == NULL) { 1209 pjdlog_exit(EX_CONFIG, 1210 "Unable to obtain full path of %s", cfgpath); 1211 } 1212 cfgpath = newcfgpath; 1213 } 1214 1215 cfg = yy_config_parse(cfgpath, true); 1216 PJDLOG_ASSERT(cfg != NULL); 1217 1218 if (pidfile != NULL) { 1219 if (strlcpy(cfg->hc_pidfile, pidfile, 1220 sizeof(cfg->hc_pidfile)) >= sizeof(cfg->hc_pidfile)) { 1221 pjdlog_exitx(EX_CONFIG, "Pidfile path is too long."); 1222 } 1223 } 1224 1225 if (!foreground) { 1226 pfh = pidfile_open(cfg->hc_pidfile, 0600, &otherpid); 1227 if (pfh == NULL) { 1228 if (errno == EEXIST) { 1229 pjdlog_exitx(EX_TEMPFAIL, 1230 "Another hastd is already running, pidfile: %s, pid: %jd.", 1231 cfg->hc_pidfile, (intmax_t)otherpid); 1232 } 1233 /* 1234 * If we cannot create pidfile for other reasons, 1235 * only warn. 1236 */ 1237 pjdlog_errno(LOG_WARNING, 1238 "Unable to open or create pidfile %s", 1239 cfg->hc_pidfile); 1240 } 1241 } 1242 1243 /* 1244 * Restore default actions for interesting signals in case parent 1245 * process (like init(8)) decided to ignore some of them (like SIGHUP). 1246 */ 1247 PJDLOG_VERIFY(signal(SIGHUP, SIG_DFL) != SIG_ERR); 1248 PJDLOG_VERIFY(signal(SIGINT, SIG_DFL) != SIG_ERR); 1249 PJDLOG_VERIFY(signal(SIGTERM, SIG_DFL) != SIG_ERR); 1250 /* 1251 * Because SIGCHLD is ignored by default, setup dummy handler for it, 1252 * so we can mask it. 1253 */ 1254 PJDLOG_VERIFY(signal(SIGCHLD, dummy_sighandler) != SIG_ERR); 1255 1256 PJDLOG_VERIFY(sigemptyset(&mask) == 0); 1257 PJDLOG_VERIFY(sigaddset(&mask, SIGHUP) == 0); 1258 PJDLOG_VERIFY(sigaddset(&mask, SIGINT) == 0); 1259 PJDLOG_VERIFY(sigaddset(&mask, SIGTERM) == 0); 1260 PJDLOG_VERIFY(sigaddset(&mask, SIGCHLD) == 0); 1261 PJDLOG_VERIFY(sigprocmask(SIG_SETMASK, &mask, NULL) == 0); 1262 1263 /* Listen on control address. */ 1264 if (proto_server(cfg->hc_controladdr, &cfg->hc_controlconn) == -1) { 1265 KEEP_ERRNO((void)pidfile_remove(pfh)); 1266 pjdlog_exit(EX_OSERR, "Unable to listen on control address %s", 1267 cfg->hc_controladdr); 1268 } 1269 /* Listen for remote connections. */ 1270 TAILQ_FOREACH(lst, &cfg->hc_listen, hl_next) { 1271 if (proto_server(lst->hl_addr, &lst->hl_conn) == -1) { 1272 KEEP_ERRNO((void)pidfile_remove(pfh)); 1273 pjdlog_exit(EX_OSERR, "Unable to listen on address %s", 1274 lst->hl_addr); 1275 } 1276 } 1277 1278 if (!foreground) { 1279 if (daemon(0, 0) == -1) { 1280 KEEP_ERRNO((void)pidfile_remove(pfh)); 1281 pjdlog_exit(EX_OSERR, "Unable to daemonize"); 1282 } 1283 1284 /* Start logging to syslog. */ 1285 pjdlog_mode_set(PJDLOG_MODE_SYSLOG); 1286 1287 /* Write PID to a file. */ 1288 if (pidfile_write(pfh) == -1) { 1289 pjdlog_errno(LOG_WARNING, 1290 "Unable to write PID to a file %s", 1291 cfg->hc_pidfile); 1292 } else { 1293 pjdlog_debug(1, "PID stored in %s.", cfg->hc_pidfile); 1294 } 1295 } 1296 1297 pjdlog_info("Started successfully, running protocol version %d.", 1298 HAST_PROTO_VERSION); 1299 1300 pjdlog_debug(1, "Listening on control address %s.", 1301 cfg->hc_controladdr); 1302 TAILQ_FOREACH(lst, &cfg->hc_listen, hl_next) 1303 pjdlog_info("Listening on address %s.", lst->hl_addr); 1304 1305 hook_init(); 1306 1307 main_loop(); 1308 1309 exit(0); 1310} 1311