hastd.c revision 218373
1204076Spjd/*- 2204076Spjd * Copyright (c) 2009-2010 The FreeBSD Foundation 3218041Spjd * Copyright (c) 2010-2011 Pawel Jakub Dawidek <pjd@FreeBSD.org> 4204076Spjd * All rights reserved. 5204076Spjd * 6204076Spjd * This software was developed by Pawel Jakub Dawidek under sponsorship from 7204076Spjd * the FreeBSD Foundation. 8204076Spjd * 9204076Spjd * Redistribution and use in source and binary forms, with or without 10204076Spjd * modification, are permitted provided that the following conditions 11204076Spjd * are met: 12204076Spjd * 1. Redistributions of source code must retain the above copyright 13204076Spjd * notice, this list of conditions and the following disclaimer. 14204076Spjd * 2. Redistributions in binary form must reproduce the above copyright 15204076Spjd * notice, this list of conditions and the following disclaimer in the 16204076Spjd * documentation and/or other materials provided with the distribution. 17204076Spjd * 18204076Spjd * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 19204076Spjd * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20204076Spjd * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21204076Spjd * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 22204076Spjd * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23204076Spjd * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24204076Spjd * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25204076Spjd * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26204076Spjd * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27204076Spjd * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28204076Spjd * SUCH DAMAGE. 29204076Spjd */ 30204076Spjd 31204076Spjd#include <sys/cdefs.h> 32204076Spjd__FBSDID("$FreeBSD: head/sbin/hastd/hastd.c 218373 2011-02-06 14:06:37Z pjd $"); 33204076Spjd 34204076Spjd#include <sys/param.h> 35204076Spjd#include <sys/linker.h> 36204076Spjd#include <sys/module.h> 37218044Spjd#include <sys/stat.h> 38204076Spjd#include <sys/wait.h> 39204076Spjd 40204076Spjd#include <err.h> 41204076Spjd#include <errno.h> 42204076Spjd#include <libutil.h> 43204076Spjd#include <signal.h> 44204076Spjd#include <stdbool.h> 45204076Spjd#include <stdio.h> 46204076Spjd#include <stdlib.h> 47204076Spjd#include <string.h> 48204076Spjd#include <sysexits.h> 49204076Spjd#include <unistd.h> 50204076Spjd 51204076Spjd#include <activemap.h> 52204076Spjd#include <pjdlog.h> 53204076Spjd 54204076Spjd#include "control.h" 55212038Spjd#include "event.h" 56204076Spjd#include "hast.h" 57204076Spjd#include "hast_proto.h" 58204076Spjd#include "hastd.h" 59211977Spjd#include "hooks.h" 60204076Spjd#include "subr.h" 61204076Spjd 62204076Spjd/* Path to configuration file. */ 63210886Spjdconst char *cfgpath = HAST_CONFIG; 64204076Spjd/* Hastd configuration. */ 65204076Spjdstatic struct hastd_config *cfg; 66204076Spjd/* Was SIGINT or SIGTERM signal received? */ 67204076Spjdbool sigexit_received = false; 68204076Spjd/* PID file handle. */ 69204076Spjdstruct pidfh *pfh; 70204076Spjd 71211977Spjd/* How often check for hooks running for too long. */ 72213430Spjd#define REPORT_INTERVAL 5 73211977Spjd 74204076Spjdstatic void 75204076Spjdusage(void) 76204076Spjd{ 77204076Spjd 78204076Spjd errx(EX_USAGE, "[-dFh] [-c config] [-P pidfile]"); 79204076Spjd} 80204076Spjd 81204076Spjdstatic void 82204076Spjdg_gate_load(void) 83204076Spjd{ 84204076Spjd 85204076Spjd if (modfind("g_gate") == -1) { 86204076Spjd /* Not present in kernel, try loading it. */ 87204076Spjd if (kldload("geom_gate") == -1 || modfind("g_gate") == -1) { 88204076Spjd if (errno != EEXIST) { 89204076Spjd pjdlog_exit(EX_OSERR, 90204076Spjd "Unable to load geom_gate module"); 91204076Spjd } 92204076Spjd } 93204076Spjd } 94204076Spjd} 95204076Spjd 96218041Spjdvoid 97218041Spjddescriptors_cleanup(struct hast_resource *res) 98218041Spjd{ 99218041Spjd struct hast_resource *tres; 100218041Spjd 101218041Spjd TAILQ_FOREACH(tres, &cfg->hc_resources, hr_next) { 102218041Spjd if (tres == res) { 103218041Spjd PJDLOG_VERIFY(res->hr_role == HAST_ROLE_SECONDARY || 104218041Spjd (res->hr_remotein == NULL && 105218041Spjd res->hr_remoteout == NULL)); 106218041Spjd continue; 107218041Spjd } 108218041Spjd if (tres->hr_remotein != NULL) 109218041Spjd proto_close(tres->hr_remotein); 110218041Spjd if (tres->hr_remoteout != NULL) 111218041Spjd proto_close(tres->hr_remoteout); 112218370Spjd if (tres->hr_ctrl != NULL) 113218370Spjd proto_close(tres->hr_ctrl); 114218370Spjd if (tres->hr_event != NULL) 115218370Spjd proto_close(tres->hr_event); 116218370Spjd if (tres->hr_conn != NULL) 117218370Spjd proto_close(tres->hr_conn); 118218041Spjd } 119218041Spjd if (cfg->hc_controlin != NULL) 120218041Spjd proto_close(cfg->hc_controlin); 121218041Spjd proto_close(cfg->hc_controlconn); 122218041Spjd proto_close(cfg->hc_listenconn); 123218041Spjd (void)pidfile_close(pfh); 124218041Spjd hook_fini(); 125218041Spjd pjdlog_fini(); 126218041Spjd} 127218041Spjd 128218044Spjdstatic const char * 129218044Spjddtype2str(mode_t mode) 130218044Spjd{ 131218044Spjd 132218044Spjd if (S_ISBLK(mode)) 133218044Spjd return ("block device"); 134218044Spjd else if (S_ISCHR(mode)) 135218044Spjd return ("character device"); 136218044Spjd else if (S_ISDIR(mode)) 137218044Spjd return ("directory"); 138218044Spjd else if (S_ISFIFO(mode)) 139218044Spjd return ("pipe or FIFO"); 140218044Spjd else if (S_ISLNK(mode)) 141218044Spjd return ("symbolic link"); 142218044Spjd else if (S_ISREG(mode)) 143218044Spjd return ("regular file"); 144218044Spjd else if (S_ISSOCK(mode)) 145218044Spjd return ("socket"); 146218044Spjd else if (S_ISWHT(mode)) 147218044Spjd return ("whiteout"); 148218044Spjd else 149218044Spjd return ("unknown"); 150218044Spjd} 151218044Spjd 152218044Spjdvoid 153218044Spjddescriptors_assert(const struct hast_resource *res, int pjdlogmode) 154218044Spjd{ 155218044Spjd char msg[256]; 156218044Spjd struct stat sb; 157218044Spjd long maxfd; 158218044Spjd bool isopen; 159218044Spjd mode_t mode; 160218044Spjd int fd; 161218044Spjd 162218044Spjd /* 163218044Spjd * At this point descriptor to syslog socket is closed, so if we want 164218044Spjd * to log assertion message, we have to first store it in 'msg' local 165218044Spjd * buffer and then open syslog socket and log it. 166218044Spjd */ 167218044Spjd msg[0] = '\0'; 168218044Spjd 169218044Spjd maxfd = sysconf(_SC_OPEN_MAX); 170218044Spjd if (maxfd < 0) { 171218373Spjd pjdlog_init(pjdlogmode); 172218373Spjd pjdlog_prefix_set("[%s] (%s) ", res->hr_name, 173218373Spjd role2str(res->hr_role)); 174218044Spjd pjdlog_errno(LOG_WARNING, "sysconf(_SC_OPEN_MAX) failed"); 175218373Spjd pjdlog_fini(); 176218044Spjd maxfd = 16384; 177218044Spjd } 178218044Spjd for (fd = 0; fd <= maxfd; fd++) { 179218044Spjd if (fstat(fd, &sb) == 0) { 180218044Spjd isopen = true; 181218044Spjd mode = sb.st_mode; 182218044Spjd } else if (errno == EBADF) { 183218044Spjd isopen = false; 184218044Spjd mode = 0; 185218044Spjd } else { 186218044Spjd isopen = true; /* silence gcc */ 187218044Spjd mode = 0; /* silence gcc */ 188218044Spjd snprintf(msg, sizeof(msg), 189218044Spjd "Unable to fstat descriptor %d: %s", fd, 190218044Spjd strerror(errno)); 191218044Spjd } 192218044Spjd if (fd == STDIN_FILENO || fd == STDOUT_FILENO || 193218044Spjd fd == STDERR_FILENO) { 194218044Spjd if (!isopen) { 195218044Spjd snprintf(msg, sizeof(msg), 196218044Spjd "Descriptor %d (%s) is closed, but should be open.", 197218044Spjd fd, (fd == STDIN_FILENO ? "stdin" : 198218044Spjd (fd == STDOUT_FILENO ? "stdout" : "stderr"))); 199218044Spjd break; 200218044Spjd } 201218044Spjd } else if (fd == proto_descriptor(res->hr_event)) { 202218044Spjd if (!isopen) { 203218044Spjd snprintf(msg, sizeof(msg), 204218044Spjd "Descriptor %d (event) is closed, but should be open.", 205218044Spjd fd); 206218044Spjd break; 207218044Spjd } 208218044Spjd if (!S_ISSOCK(mode)) { 209218044Spjd snprintf(msg, sizeof(msg), 210218044Spjd "Descriptor %d (event) is %s, but should be %s.", 211218044Spjd fd, dtype2str(mode), dtype2str(S_IFSOCK)); 212218044Spjd break; 213218044Spjd } 214218044Spjd } else if (fd == proto_descriptor(res->hr_ctrl)) { 215218044Spjd if (!isopen) { 216218044Spjd snprintf(msg, sizeof(msg), 217218044Spjd "Descriptor %d (ctrl) is closed, but should be open.", 218218044Spjd fd); 219218044Spjd break; 220218044Spjd } 221218044Spjd if (!S_ISSOCK(mode)) { 222218044Spjd snprintf(msg, sizeof(msg), 223218044Spjd "Descriptor %d (ctrl) is %s, but should be %s.", 224218044Spjd fd, dtype2str(mode), dtype2str(S_IFSOCK)); 225218044Spjd break; 226218044Spjd } 227218218Spjd } else if (fd == proto_descriptor(res->hr_conn)) { 228218218Spjd if (!isopen) { 229218218Spjd snprintf(msg, sizeof(msg), 230218218Spjd "Descriptor %d (conn) is closed, but should be open.", 231218218Spjd fd); 232218218Spjd break; 233218218Spjd } 234218218Spjd if (!S_ISSOCK(mode)) { 235218218Spjd snprintf(msg, sizeof(msg), 236218218Spjd "Descriptor %d (conn) is %s, but should be %s.", 237218218Spjd fd, dtype2str(mode), dtype2str(S_IFSOCK)); 238218218Spjd break; 239218218Spjd } 240218044Spjd } else if (res->hr_role == HAST_ROLE_SECONDARY && 241218044Spjd fd == proto_descriptor(res->hr_remotein)) { 242218044Spjd if (!isopen) { 243218044Spjd snprintf(msg, sizeof(msg), 244218044Spjd "Descriptor %d (remote in) is closed, but should be open.", 245218044Spjd fd); 246218044Spjd break; 247218044Spjd } 248218044Spjd if (!S_ISSOCK(mode)) { 249218044Spjd snprintf(msg, sizeof(msg), 250218044Spjd "Descriptor %d (remote in) is %s, but should be %s.", 251218044Spjd fd, dtype2str(mode), dtype2str(S_IFSOCK)); 252218044Spjd break; 253218044Spjd } 254218044Spjd } else if (res->hr_role == HAST_ROLE_SECONDARY && 255218044Spjd fd == proto_descriptor(res->hr_remoteout)) { 256218044Spjd if (!isopen) { 257218044Spjd snprintf(msg, sizeof(msg), 258218044Spjd "Descriptor %d (remote out) is closed, but should be open.", 259218044Spjd fd); 260218044Spjd break; 261218044Spjd } 262218044Spjd if (!S_ISSOCK(mode)) { 263218044Spjd snprintf(msg, sizeof(msg), 264218044Spjd "Descriptor %d (remote out) is %s, but should be %s.", 265218044Spjd fd, dtype2str(mode), dtype2str(S_IFSOCK)); 266218044Spjd break; 267218044Spjd } 268218044Spjd } else { 269218044Spjd if (isopen) { 270218044Spjd snprintf(msg, sizeof(msg), 271218044Spjd "Descriptor %d is open (%s), but should be closed.", 272218044Spjd fd, dtype2str(mode)); 273218044Spjd break; 274218044Spjd } 275218044Spjd } 276218044Spjd } 277218044Spjd if (msg[0] != '\0') { 278218044Spjd pjdlog_init(pjdlogmode); 279218044Spjd pjdlog_prefix_set("[%s] (%s) ", res->hr_name, 280218044Spjd role2str(res->hr_role)); 281218044Spjd PJDLOG_ABORT("%s", msg); 282218044Spjd } 283218044Spjd} 284218044Spjd 285204076Spjdstatic void 286207372Spjdchild_exit_log(unsigned int pid, int status) 287207372Spjd{ 288207372Spjd 289207372Spjd if (WIFEXITED(status) && WEXITSTATUS(status) == 0) { 290207372Spjd pjdlog_debug(1, "Worker process exited gracefully (pid=%u).", 291207372Spjd pid); 292207372Spjd } else if (WIFSIGNALED(status)) { 293207372Spjd pjdlog_error("Worker process killed (pid=%u, signal=%d).", 294207372Spjd pid, WTERMSIG(status)); 295207372Spjd } else { 296207372Spjd pjdlog_error("Worker process exited ungracefully (pid=%u, exitcode=%d).", 297207372Spjd pid, WIFEXITED(status) ? WEXITSTATUS(status) : -1); 298207372Spjd } 299207372Spjd} 300207372Spjd 301207372Spjdstatic void 302204076Spjdchild_exit(void) 303204076Spjd{ 304204076Spjd struct hast_resource *res; 305204076Spjd int status; 306204076Spjd pid_t pid; 307204076Spjd 308204076Spjd while ((pid = wait3(&status, WNOHANG, NULL)) > 0) { 309204076Spjd /* Find resource related to the process that just exited. */ 310204076Spjd TAILQ_FOREACH(res, &cfg->hc_resources, hr_next) { 311204076Spjd if (pid == res->hr_workerpid) 312204076Spjd break; 313204076Spjd } 314204076Spjd if (res == NULL) { 315204076Spjd /* 316204076Spjd * This can happen when new connection arrives and we 317211977Spjd * cancel child responsible for the old one or if this 318211977Spjd * was hook which we executed. 319204076Spjd */ 320211977Spjd hook_check_one(pid, status); 321204076Spjd continue; 322204076Spjd } 323204076Spjd pjdlog_prefix_set("[%s] (%s) ", res->hr_name, 324204076Spjd role2str(res->hr_role)); 325207372Spjd child_exit_log(pid, status); 326213006Spjd child_cleanup(res); 327204076Spjd if (res->hr_role == HAST_ROLE_PRIMARY) { 328207372Spjd /* 329207372Spjd * Restart child process if it was killed by signal 330207372Spjd * or exited because of temporary problem. 331207372Spjd */ 332207372Spjd if (WIFSIGNALED(status) || 333207372Spjd (WIFEXITED(status) && 334207372Spjd WEXITSTATUS(status) == EX_TEMPFAIL)) { 335207348Spjd sleep(1); 336207348Spjd pjdlog_info("Restarting worker process."); 337207348Spjd hastd_primary(res); 338207348Spjd } else { 339207348Spjd res->hr_role = HAST_ROLE_INIT; 340207348Spjd pjdlog_info("Changing resource role back to %s.", 341207348Spjd role2str(res->hr_role)); 342207348Spjd } 343204076Spjd } 344204076Spjd pjdlog_prefix_set("%s", ""); 345204076Spjd } 346204076Spjd} 347204076Spjd 348210886Spjdstatic bool 349210886Spjdresource_needs_restart(const struct hast_resource *res0, 350210886Spjd const struct hast_resource *res1) 351210886Spjd{ 352210886Spjd 353218138Spjd PJDLOG_ASSERT(strcmp(res0->hr_name, res1->hr_name) == 0); 354210886Spjd 355210886Spjd if (strcmp(res0->hr_provname, res1->hr_provname) != 0) 356210886Spjd return (true); 357210886Spjd if (strcmp(res0->hr_localpath, res1->hr_localpath) != 0) 358210886Spjd return (true); 359210886Spjd if (res0->hr_role == HAST_ROLE_INIT || 360210886Spjd res0->hr_role == HAST_ROLE_SECONDARY) { 361210886Spjd if (strcmp(res0->hr_remoteaddr, res1->hr_remoteaddr) != 0) 362210886Spjd return (true); 363210886Spjd if (res0->hr_replication != res1->hr_replication) 364210886Spjd return (true); 365210886Spjd if (res0->hr_timeout != res1->hr_timeout) 366210886Spjd return (true); 367211886Spjd if (strcmp(res0->hr_exec, res1->hr_exec) != 0) 368211886Spjd return (true); 369210886Spjd } 370210886Spjd return (false); 371210886Spjd} 372210886Spjd 373210886Spjdstatic bool 374210886Spjdresource_needs_reload(const struct hast_resource *res0, 375210886Spjd const struct hast_resource *res1) 376210886Spjd{ 377210886Spjd 378218138Spjd PJDLOG_ASSERT(strcmp(res0->hr_name, res1->hr_name) == 0); 379218138Spjd PJDLOG_ASSERT(strcmp(res0->hr_provname, res1->hr_provname) == 0); 380218138Spjd PJDLOG_ASSERT(strcmp(res0->hr_localpath, res1->hr_localpath) == 0); 381210886Spjd 382210886Spjd if (res0->hr_role != HAST_ROLE_PRIMARY) 383210886Spjd return (false); 384210886Spjd 385210886Spjd if (strcmp(res0->hr_remoteaddr, res1->hr_remoteaddr) != 0) 386210886Spjd return (true); 387210886Spjd if (res0->hr_replication != res1->hr_replication) 388210886Spjd return (true); 389210886Spjd if (res0->hr_timeout != res1->hr_timeout) 390210886Spjd return (true); 391211886Spjd if (strcmp(res0->hr_exec, res1->hr_exec) != 0) 392211886Spjd return (true); 393210886Spjd return (false); 394210886Spjd} 395210886Spjd 396204076Spjdstatic void 397217784Spjdresource_reload(const struct hast_resource *res) 398217784Spjd{ 399217784Spjd struct nv *nvin, *nvout; 400217784Spjd int error; 401217784Spjd 402218138Spjd PJDLOG_ASSERT(res->hr_role == HAST_ROLE_PRIMARY); 403217784Spjd 404217784Spjd nvout = nv_alloc(); 405217784Spjd nv_add_uint8(nvout, HASTCTL_RELOAD, "cmd"); 406217784Spjd nv_add_string(nvout, res->hr_remoteaddr, "remoteaddr"); 407217784Spjd nv_add_int32(nvout, (int32_t)res->hr_replication, "replication"); 408217784Spjd nv_add_int32(nvout, (int32_t)res->hr_timeout, "timeout"); 409217784Spjd nv_add_string(nvout, res->hr_exec, "exec"); 410217784Spjd if (nv_error(nvout) != 0) { 411217784Spjd nv_free(nvout); 412217784Spjd pjdlog_error("Unable to allocate header for reload message."); 413217784Spjd return; 414217784Spjd } 415217784Spjd if (hast_proto_send(res, res->hr_ctrl, nvout, NULL, 0) < 0) { 416217784Spjd pjdlog_errno(LOG_ERR, "Unable to send reload message"); 417217784Spjd nv_free(nvout); 418217784Spjd return; 419217784Spjd } 420217784Spjd nv_free(nvout); 421217784Spjd 422217784Spjd /* Receive response. */ 423217784Spjd if (hast_proto_recv_hdr(res->hr_ctrl, &nvin) < 0) { 424217784Spjd pjdlog_errno(LOG_ERR, "Unable to receive reload reply"); 425217784Spjd return; 426217784Spjd } 427217784Spjd error = nv_get_int16(nvin, "error"); 428217784Spjd nv_free(nvin); 429217784Spjd if (error != 0) { 430217784Spjd pjdlog_common(LOG_ERR, 0, error, "Reload failed"); 431217784Spjd return; 432217784Spjd } 433217784Spjd} 434217784Spjd 435217784Spjdstatic void 436204076Spjdhastd_reload(void) 437204076Spjd{ 438210886Spjd struct hastd_config *newcfg; 439210886Spjd struct hast_resource *nres, *cres, *tres; 440210886Spjd uint8_t role; 441204076Spjd 442210886Spjd pjdlog_info("Reloading configuration..."); 443210886Spjd 444210886Spjd newcfg = yy_config_parse(cfgpath, false); 445210886Spjd if (newcfg == NULL) 446210886Spjd goto failed; 447210886Spjd 448210886Spjd /* 449210886Spjd * Check if control address has changed. 450210886Spjd */ 451210886Spjd if (strcmp(cfg->hc_controladdr, newcfg->hc_controladdr) != 0) { 452210886Spjd if (proto_server(newcfg->hc_controladdr, 453210886Spjd &newcfg->hc_controlconn) < 0) { 454210886Spjd pjdlog_errno(LOG_ERR, 455210886Spjd "Unable to listen on control address %s", 456210886Spjd newcfg->hc_controladdr); 457210886Spjd goto failed; 458210886Spjd } 459210886Spjd } 460210886Spjd /* 461210886Spjd * Check if listen address has changed. 462210886Spjd */ 463210886Spjd if (strcmp(cfg->hc_listenaddr, newcfg->hc_listenaddr) != 0) { 464210886Spjd if (proto_server(newcfg->hc_listenaddr, 465210886Spjd &newcfg->hc_listenconn) < 0) { 466210886Spjd pjdlog_errno(LOG_ERR, "Unable to listen on address %s", 467210886Spjd newcfg->hc_listenaddr); 468210886Spjd goto failed; 469210886Spjd } 470210886Spjd } 471210886Spjd /* 472210886Spjd * Only when both control and listen sockets are successfully 473210886Spjd * initialized switch them to new configuration. 474210886Spjd */ 475210886Spjd if (newcfg->hc_controlconn != NULL) { 476210886Spjd pjdlog_info("Control socket changed from %s to %s.", 477210886Spjd cfg->hc_controladdr, newcfg->hc_controladdr); 478210886Spjd proto_close(cfg->hc_controlconn); 479210886Spjd cfg->hc_controlconn = newcfg->hc_controlconn; 480210886Spjd newcfg->hc_controlconn = NULL; 481210886Spjd strlcpy(cfg->hc_controladdr, newcfg->hc_controladdr, 482210886Spjd sizeof(cfg->hc_controladdr)); 483210886Spjd } 484210886Spjd if (newcfg->hc_listenconn != NULL) { 485210886Spjd pjdlog_info("Listen socket changed from %s to %s.", 486210886Spjd cfg->hc_listenaddr, newcfg->hc_listenaddr); 487210886Spjd proto_close(cfg->hc_listenconn); 488210886Spjd cfg->hc_listenconn = newcfg->hc_listenconn; 489210886Spjd newcfg->hc_listenconn = NULL; 490210886Spjd strlcpy(cfg->hc_listenaddr, newcfg->hc_listenaddr, 491210886Spjd sizeof(cfg->hc_listenaddr)); 492210886Spjd } 493210886Spjd 494210886Spjd /* 495210886Spjd * Stop and remove resources that were removed from the configuration. 496210886Spjd */ 497210886Spjd TAILQ_FOREACH_SAFE(cres, &cfg->hc_resources, hr_next, tres) { 498210886Spjd TAILQ_FOREACH(nres, &newcfg->hc_resources, hr_next) { 499210886Spjd if (strcmp(cres->hr_name, nres->hr_name) == 0) 500210886Spjd break; 501210886Spjd } 502210886Spjd if (nres == NULL) { 503210886Spjd control_set_role(cres, HAST_ROLE_INIT); 504210886Spjd TAILQ_REMOVE(&cfg->hc_resources, cres, hr_next); 505210886Spjd pjdlog_info("Resource %s removed.", cres->hr_name); 506210886Spjd free(cres); 507210886Spjd } 508210886Spjd } 509210886Spjd /* 510210886Spjd * Move new resources to the current configuration. 511210886Spjd */ 512210886Spjd TAILQ_FOREACH_SAFE(nres, &newcfg->hc_resources, hr_next, tres) { 513210886Spjd TAILQ_FOREACH(cres, &cfg->hc_resources, hr_next) { 514210886Spjd if (strcmp(cres->hr_name, nres->hr_name) == 0) 515210886Spjd break; 516210886Spjd } 517210886Spjd if (cres == NULL) { 518210886Spjd TAILQ_REMOVE(&newcfg->hc_resources, nres, hr_next); 519210886Spjd TAILQ_INSERT_TAIL(&cfg->hc_resources, nres, hr_next); 520210886Spjd pjdlog_info("Resource %s added.", nres->hr_name); 521210886Spjd } 522210886Spjd } 523210886Spjd /* 524210886Spjd * Deal with modified resources. 525210886Spjd * Depending on what has changed exactly we might want to perform 526210886Spjd * different actions. 527210886Spjd * 528210886Spjd * We do full resource restart in the following situations: 529210886Spjd * Resource role is INIT or SECONDARY. 530210886Spjd * Resource role is PRIMARY and path to local component or provider 531210886Spjd * name has changed. 532210886Spjd * In case of PRIMARY, the worker process will be killed and restarted, 533210886Spjd * which also means removing /dev/hast/<name> provider and 534210886Spjd * recreating it. 535210886Spjd * 536210886Spjd * We do just reload (send SIGHUP to worker process) if we act as 537217729Spjd * PRIMARY, but only if remote address, replication mode, timeout or 538217729Spjd * execution path has changed. For those, there is no need to restart 539217729Spjd * worker process. 540210886Spjd * If PRIMARY receives SIGHUP, it will reconnect if remote address or 541210886Spjd * replication mode has changed or simply set new timeout if only 542210886Spjd * timeout has changed. 543210886Spjd */ 544210886Spjd TAILQ_FOREACH_SAFE(nres, &newcfg->hc_resources, hr_next, tres) { 545210886Spjd TAILQ_FOREACH(cres, &cfg->hc_resources, hr_next) { 546210886Spjd if (strcmp(cres->hr_name, nres->hr_name) == 0) 547210886Spjd break; 548210886Spjd } 549218138Spjd PJDLOG_ASSERT(cres != NULL); 550210886Spjd if (resource_needs_restart(cres, nres)) { 551210886Spjd pjdlog_info("Resource %s configuration was modified, restarting it.", 552210886Spjd cres->hr_name); 553210886Spjd role = cres->hr_role; 554210886Spjd control_set_role(cres, HAST_ROLE_INIT); 555210886Spjd TAILQ_REMOVE(&cfg->hc_resources, cres, hr_next); 556210886Spjd free(cres); 557210886Spjd TAILQ_REMOVE(&newcfg->hc_resources, nres, hr_next); 558210886Spjd TAILQ_INSERT_TAIL(&cfg->hc_resources, nres, hr_next); 559210886Spjd control_set_role(nres, role); 560210886Spjd } else if (resource_needs_reload(cres, nres)) { 561210886Spjd pjdlog_info("Resource %s configuration was modified, reloading it.", 562210886Spjd cres->hr_name); 563210886Spjd strlcpy(cres->hr_remoteaddr, nres->hr_remoteaddr, 564210886Spjd sizeof(cres->hr_remoteaddr)); 565210886Spjd cres->hr_replication = nres->hr_replication; 566210886Spjd cres->hr_timeout = nres->hr_timeout; 567217729Spjd strlcpy(cres->hr_exec, nres->hr_exec, 568217729Spjd sizeof(cres->hr_exec)); 569217784Spjd if (cres->hr_workerpid != 0) 570217784Spjd resource_reload(cres); 571210886Spjd } 572210886Spjd } 573210886Spjd 574210886Spjd yy_config_free(newcfg); 575210886Spjd pjdlog_info("Configuration reloaded successfully."); 576210886Spjd return; 577210886Spjdfailed: 578210886Spjd if (newcfg != NULL) { 579210886Spjd if (newcfg->hc_controlconn != NULL) 580210886Spjd proto_close(newcfg->hc_controlconn); 581210886Spjd if (newcfg->hc_listenconn != NULL) 582210886Spjd proto_close(newcfg->hc_listenconn); 583210886Spjd yy_config_free(newcfg); 584210886Spjd } 585210886Spjd pjdlog_warning("Configuration not reloaded."); 586204076Spjd} 587204076Spjd 588204076Spjdstatic void 589211899Spjdterminate_workers(void) 590211899Spjd{ 591211899Spjd struct hast_resource *res; 592211899Spjd 593211899Spjd pjdlog_info("Termination signal received, exiting."); 594211899Spjd TAILQ_FOREACH(res, &cfg->hc_resources, hr_next) { 595211899Spjd if (res->hr_workerpid == 0) 596211899Spjd continue; 597211899Spjd pjdlog_info("Terminating worker process (resource=%s, role=%s, pid=%u).", 598211899Spjd res->hr_name, role2str(res->hr_role), res->hr_workerpid); 599211899Spjd if (kill(res->hr_workerpid, SIGTERM) == 0) 600211899Spjd continue; 601211899Spjd pjdlog_errno(LOG_WARNING, 602211899Spjd "Unable to send signal to worker process (resource=%s, role=%s, pid=%u).", 603211899Spjd res->hr_name, role2str(res->hr_role), res->hr_workerpid); 604211899Spjd } 605211899Spjd} 606211899Spjd 607211899Spjdstatic void 608204076Spjdlisten_accept(void) 609204076Spjd{ 610204076Spjd struct hast_resource *res; 611204076Spjd struct proto_conn *conn; 612204076Spjd struct nv *nvin, *nvout, *nverr; 613204076Spjd const char *resname; 614204076Spjd const unsigned char *token; 615204076Spjd char laddr[256], raddr[256]; 616204076Spjd size_t size; 617204076Spjd pid_t pid; 618204076Spjd int status; 619204076Spjd 620204076Spjd proto_local_address(cfg->hc_listenconn, laddr, sizeof(laddr)); 621204076Spjd pjdlog_debug(1, "Accepting connection to %s.", laddr); 622204076Spjd 623204076Spjd if (proto_accept(cfg->hc_listenconn, &conn) < 0) { 624204076Spjd pjdlog_errno(LOG_ERR, "Unable to accept connection %s", laddr); 625204076Spjd return; 626204076Spjd } 627204076Spjd 628204076Spjd proto_local_address(conn, laddr, sizeof(laddr)); 629204076Spjd proto_remote_address(conn, raddr, sizeof(raddr)); 630209185Spjd pjdlog_info("Connection from %s to %s.", raddr, laddr); 631204076Spjd 632207371Spjd /* Error in setting timeout is not critical, but why should it fail? */ 633207371Spjd if (proto_timeout(conn, HAST_TIMEOUT) < 0) 634207371Spjd pjdlog_errno(LOG_WARNING, "Unable to set connection timeout"); 635207371Spjd 636204076Spjd nvin = nvout = nverr = NULL; 637204076Spjd 638204076Spjd /* 639204076Spjd * Before receiving any data see if remote host have access to any 640204076Spjd * resource. 641204076Spjd */ 642204076Spjd TAILQ_FOREACH(res, &cfg->hc_resources, hr_next) { 643204076Spjd if (proto_address_match(conn, res->hr_remoteaddr)) 644204076Spjd break; 645204076Spjd } 646204076Spjd if (res == NULL) { 647204076Spjd pjdlog_error("Client %s isn't known.", raddr); 648204076Spjd goto close; 649204076Spjd } 650204076Spjd /* Ok, remote host can access at least one resource. */ 651204076Spjd 652204076Spjd if (hast_proto_recv_hdr(conn, &nvin) < 0) { 653204076Spjd pjdlog_errno(LOG_ERR, "Unable to receive header from %s", 654204076Spjd raddr); 655204076Spjd goto close; 656204076Spjd } 657204076Spjd 658204076Spjd resname = nv_get_string(nvin, "resource"); 659204076Spjd if (resname == NULL) { 660204076Spjd pjdlog_error("No 'resource' field in the header received from %s.", 661204076Spjd raddr); 662204076Spjd goto close; 663204076Spjd } 664204076Spjd pjdlog_debug(2, "%s: resource=%s", raddr, resname); 665204076Spjd token = nv_get_uint8_array(nvin, &size, "token"); 666204076Spjd /* 667204076Spjd * NULL token means that this is first conection. 668204076Spjd */ 669204076Spjd if (token != NULL && size != sizeof(res->hr_token)) { 670204076Spjd pjdlog_error("Received token of invalid size from %s (expected %zu, got %zu).", 671204076Spjd raddr, sizeof(res->hr_token), size); 672204076Spjd goto close; 673204076Spjd } 674204076Spjd 675204076Spjd /* 676204076Spjd * From now on we want to send errors to the remote node. 677204076Spjd */ 678204076Spjd nverr = nv_alloc(); 679204076Spjd 680204076Spjd /* Find resource related to this connection. */ 681204076Spjd TAILQ_FOREACH(res, &cfg->hc_resources, hr_next) { 682204076Spjd if (strcmp(resname, res->hr_name) == 0) 683204076Spjd break; 684204076Spjd } 685204076Spjd /* Have we found the resource? */ 686204076Spjd if (res == NULL) { 687204076Spjd pjdlog_error("No resource '%s' as requested by %s.", 688204076Spjd resname, raddr); 689204076Spjd nv_add_stringf(nverr, "errmsg", "Resource not configured."); 690204076Spjd goto fail; 691204076Spjd } 692204076Spjd 693204076Spjd /* Now that we know resource name setup log prefix. */ 694204076Spjd pjdlog_prefix_set("[%s] (%s) ", res->hr_name, role2str(res->hr_role)); 695204076Spjd 696204076Spjd /* Does the remote host have access to this resource? */ 697204076Spjd if (!proto_address_match(conn, res->hr_remoteaddr)) { 698204076Spjd pjdlog_error("Client %s has no access to the resource.", raddr); 699204076Spjd nv_add_stringf(nverr, "errmsg", "No access to the resource."); 700204076Spjd goto fail; 701204076Spjd } 702204076Spjd /* Is the resource marked as secondary? */ 703204076Spjd if (res->hr_role != HAST_ROLE_SECONDARY) { 704204076Spjd pjdlog_error("We act as %s for the resource and not as %s as requested by %s.", 705204076Spjd role2str(res->hr_role), role2str(HAST_ROLE_SECONDARY), 706204076Spjd raddr); 707204076Spjd nv_add_stringf(nverr, "errmsg", 708204076Spjd "Remote node acts as %s for the resource and not as %s.", 709204076Spjd role2str(res->hr_role), role2str(HAST_ROLE_SECONDARY)); 710204076Spjd goto fail; 711204076Spjd } 712204076Spjd /* Does token (if exists) match? */ 713204076Spjd if (token != NULL && memcmp(token, res->hr_token, 714204076Spjd sizeof(res->hr_token)) != 0) { 715204076Spjd pjdlog_error("Token received from %s doesn't match.", raddr); 716209185Spjd nv_add_stringf(nverr, "errmsg", "Token doesn't match."); 717204076Spjd goto fail; 718204076Spjd } 719204076Spjd /* 720204076Spjd * If there is no token, but we have half-open connection 721204076Spjd * (only remotein) or full connection (worker process is running) 722204076Spjd * we have to cancel those and accept the new connection. 723204076Spjd */ 724204076Spjd if (token == NULL) { 725218138Spjd PJDLOG_ASSERT(res->hr_remoteout == NULL); 726204076Spjd pjdlog_debug(1, "Initial connection from %s.", raddr); 727204076Spjd if (res->hr_workerpid != 0) { 728218138Spjd PJDLOG_ASSERT(res->hr_remotein == NULL); 729204076Spjd pjdlog_debug(1, 730204076Spjd "Worker process exists (pid=%u), stopping it.", 731204076Spjd (unsigned int)res->hr_workerpid); 732204076Spjd /* Stop child process. */ 733204076Spjd if (kill(res->hr_workerpid, SIGINT) < 0) { 734204076Spjd pjdlog_errno(LOG_ERR, 735204076Spjd "Unable to stop worker process (pid=%u)", 736204076Spjd (unsigned int)res->hr_workerpid); 737204076Spjd /* 738204076Spjd * Other than logging the problem we 739204076Spjd * ignore it - nothing smart to do. 740204076Spjd */ 741204076Spjd } 742204076Spjd /* Wait for it to exit. */ 743204076Spjd else if ((pid = waitpid(res->hr_workerpid, 744204076Spjd &status, 0)) != res->hr_workerpid) { 745207372Spjd /* We can only log the problem. */ 746204076Spjd pjdlog_errno(LOG_ERR, 747204076Spjd "Waiting for worker process (pid=%u) failed", 748204076Spjd (unsigned int)res->hr_workerpid); 749204076Spjd } else { 750207372Spjd child_exit_log(res->hr_workerpid, status); 751204076Spjd } 752213006Spjd child_cleanup(res); 753204076Spjd } else if (res->hr_remotein != NULL) { 754204076Spjd char oaddr[256]; 755204076Spjd 756213981Spjd proto_remote_address(res->hr_remotein, oaddr, 757213981Spjd sizeof(oaddr)); 758204076Spjd pjdlog_debug(1, 759204076Spjd "Canceling half-open connection from %s on connection from %s.", 760204076Spjd oaddr, raddr); 761204076Spjd proto_close(res->hr_remotein); 762204076Spjd res->hr_remotein = NULL; 763204076Spjd } 764204076Spjd } 765204076Spjd 766204076Spjd /* 767204076Spjd * Checks and cleanups are done. 768204076Spjd */ 769204076Spjd 770204076Spjd if (token == NULL) { 771204076Spjd arc4random_buf(res->hr_token, sizeof(res->hr_token)); 772204076Spjd nvout = nv_alloc(); 773204076Spjd nv_add_uint8_array(nvout, res->hr_token, 774204076Spjd sizeof(res->hr_token), "token"); 775204076Spjd if (nv_error(nvout) != 0) { 776204076Spjd pjdlog_common(LOG_ERR, 0, nv_error(nvout), 777204076Spjd "Unable to prepare return header for %s", raddr); 778204076Spjd nv_add_stringf(nverr, "errmsg", 779204076Spjd "Remote node was unable to prepare return header: %s.", 780204076Spjd strerror(nv_error(nvout))); 781204076Spjd goto fail; 782204076Spjd } 783204076Spjd if (hast_proto_send(NULL, conn, nvout, NULL, 0) < 0) { 784204076Spjd int error = errno; 785204076Spjd 786204076Spjd pjdlog_errno(LOG_ERR, "Unable to send response to %s", 787204076Spjd raddr); 788204076Spjd nv_add_stringf(nverr, "errmsg", 789204076Spjd "Remote node was unable to send response: %s.", 790204076Spjd strerror(error)); 791204076Spjd goto fail; 792204076Spjd } 793204076Spjd res->hr_remotein = conn; 794204076Spjd pjdlog_debug(1, "Incoming connection from %s configured.", 795204076Spjd raddr); 796204076Spjd } else { 797204076Spjd res->hr_remoteout = conn; 798204076Spjd pjdlog_debug(1, "Outgoing connection to %s configured.", raddr); 799204076Spjd hastd_secondary(res, nvin); 800204076Spjd } 801204076Spjd nv_free(nvin); 802204076Spjd nv_free(nvout); 803204076Spjd nv_free(nverr); 804204076Spjd pjdlog_prefix_set("%s", ""); 805204076Spjd return; 806204076Spjdfail: 807204076Spjd if (nv_error(nverr) != 0) { 808204076Spjd pjdlog_common(LOG_ERR, 0, nv_error(nverr), 809204076Spjd "Unable to prepare error header for %s", raddr); 810204076Spjd goto close; 811204076Spjd } 812204076Spjd if (hast_proto_send(NULL, conn, nverr, NULL, 0) < 0) { 813204076Spjd pjdlog_errno(LOG_ERR, "Unable to send error to %s", raddr); 814204076Spjd goto close; 815204076Spjd } 816204076Spjdclose: 817204076Spjd if (nvin != NULL) 818204076Spjd nv_free(nvin); 819204076Spjd if (nvout != NULL) 820204076Spjd nv_free(nvout); 821204076Spjd if (nverr != NULL) 822204076Spjd nv_free(nverr); 823204076Spjd proto_close(conn); 824204076Spjd pjdlog_prefix_set("%s", ""); 825204076Spjd} 826204076Spjd 827204076Spjdstatic void 828218218Spjdconnection_migrate(struct hast_resource *res) 829218218Spjd{ 830218218Spjd struct proto_conn *conn; 831218218Spjd int16_t val = 0; 832218218Spjd 833218218Spjd if (proto_recv(res->hr_conn, &val, sizeof(val)) < 0) { 834218218Spjd pjdlog_errno(LOG_WARNING, 835218218Spjd "Unable to receive connection command"); 836218218Spjd return; 837218218Spjd } 838218218Spjd if (proto_client(res->hr_remoteaddr, &conn) < 0) { 839218218Spjd val = errno; 840218218Spjd pjdlog_errno(LOG_WARNING, 841218218Spjd "Unable to create outgoing connection to %s", 842218218Spjd res->hr_remoteaddr); 843218218Spjd goto out; 844218218Spjd } 845218218Spjd if (proto_connect(conn, -1) < 0) { 846218218Spjd val = errno; 847218218Spjd pjdlog_errno(LOG_WARNING, "Unable to connect to %s", 848218218Spjd res->hr_remoteaddr); 849218218Spjd proto_close(conn); 850218218Spjd goto out; 851218218Spjd } 852218218Spjd val = 0; 853218218Spjdout: 854218218Spjd if (proto_send(res->hr_conn, &val, sizeof(val)) < 0) { 855218218Spjd pjdlog_errno(LOG_WARNING, 856218218Spjd "Unable to send reply to connection request"); 857218218Spjd } 858218218Spjd if (val == 0 && proto_connection_send(res->hr_conn, conn) < 0) 859218218Spjd pjdlog_errno(LOG_WARNING, "Unable to send connection"); 860218218Spjd} 861218218Spjd 862218218Spjdstatic void 863204076Spjdmain_loop(void) 864204076Spjd{ 865212038Spjd struct hast_resource *res; 866213009Spjd struct timeval seltimeout; 867213009Spjd struct timespec sigtimeout; 868213009Spjd int fd, maxfd, ret, signo; 869213009Spjd sigset_t mask; 870212037Spjd fd_set rfds; 871204076Spjd 872213009Spjd seltimeout.tv_sec = REPORT_INTERVAL; 873213009Spjd seltimeout.tv_usec = 0; 874213009Spjd sigtimeout.tv_sec = 0; 875213009Spjd sigtimeout.tv_nsec = 0; 876211977Spjd 877213009Spjd PJDLOG_VERIFY(sigemptyset(&mask) == 0); 878213009Spjd PJDLOG_VERIFY(sigaddset(&mask, SIGHUP) == 0); 879213009Spjd PJDLOG_VERIFY(sigaddset(&mask, SIGINT) == 0); 880213009Spjd PJDLOG_VERIFY(sigaddset(&mask, SIGTERM) == 0); 881213009Spjd PJDLOG_VERIFY(sigaddset(&mask, SIGCHLD) == 0); 882213009Spjd 883216477Spjd pjdlog_info("Started successfully, running protocol version %d.", 884216477Spjd HAST_PROTO_VERSION); 885216477Spjd 886204076Spjd for (;;) { 887213009Spjd while ((signo = sigtimedwait(&mask, NULL, &sigtimeout)) != -1) { 888213009Spjd switch (signo) { 889213009Spjd case SIGINT: 890213009Spjd case SIGTERM: 891213009Spjd sigexit_received = true; 892213009Spjd terminate_workers(); 893217967Spjd proto_close(cfg->hc_controlconn); 894213009Spjd exit(EX_OK); 895213009Spjd break; 896213009Spjd case SIGCHLD: 897213009Spjd child_exit(); 898213009Spjd break; 899213009Spjd case SIGHUP: 900213009Spjd hastd_reload(); 901213009Spjd break; 902213009Spjd default: 903218138Spjd PJDLOG_ABORT("Unexpected signal (%d).", signo); 904213009Spjd } 905211899Spjd } 906204076Spjd 907209177Spjd /* Setup descriptors for select(2). */ 908204076Spjd FD_ZERO(&rfds); 909212038Spjd maxfd = fd = proto_descriptor(cfg->hc_controlconn); 910218138Spjd PJDLOG_ASSERT(fd >= 0); 911212038Spjd FD_SET(fd, &rfds); 912212038Spjd fd = proto_descriptor(cfg->hc_listenconn); 913218138Spjd PJDLOG_ASSERT(fd >= 0); 914212038Spjd FD_SET(fd, &rfds); 915212038Spjd maxfd = fd > maxfd ? fd : maxfd; 916212038Spjd TAILQ_FOREACH(res, &cfg->hc_resources, hr_next) { 917212038Spjd if (res->hr_event == NULL) 918212038Spjd continue; 919218218Spjd PJDLOG_ASSERT(res->hr_conn != NULL); 920212038Spjd fd = proto_descriptor(res->hr_event); 921218138Spjd PJDLOG_ASSERT(fd >= 0); 922212038Spjd FD_SET(fd, &rfds); 923212038Spjd maxfd = fd > maxfd ? fd : maxfd; 924218218Spjd if (res->hr_role == HAST_ROLE_PRIMARY) { 925218218Spjd /* Only primary workers asks for connections. */ 926218218Spjd fd = proto_descriptor(res->hr_conn); 927218218Spjd PJDLOG_ASSERT(fd >= 0); 928218218Spjd FD_SET(fd, &rfds); 929218218Spjd maxfd = fd > maxfd ? fd : maxfd; 930218218Spjd } 931212038Spjd } 932204076Spjd 933218138Spjd PJDLOG_ASSERT(maxfd + 1 <= (int)FD_SETSIZE); 934213009Spjd ret = select(maxfd + 1, &rfds, NULL, NULL, &seltimeout); 935211977Spjd if (ret == 0) 936213429Spjd hook_check(); 937211977Spjd else if (ret == -1) { 938204076Spjd if (errno == EINTR) 939204076Spjd continue; 940204076Spjd KEEP_ERRNO((void)pidfile_remove(pfh)); 941204076Spjd pjdlog_exit(EX_OSERR, "select() failed"); 942204076Spjd } 943204076Spjd 944212038Spjd if (FD_ISSET(proto_descriptor(cfg->hc_controlconn), &rfds)) 945204076Spjd control_handle(cfg); 946212038Spjd if (FD_ISSET(proto_descriptor(cfg->hc_listenconn), &rfds)) 947204076Spjd listen_accept(); 948212038Spjd TAILQ_FOREACH(res, &cfg->hc_resources, hr_next) { 949212038Spjd if (res->hr_event == NULL) 950212038Spjd continue; 951218218Spjd PJDLOG_ASSERT(res->hr_conn != NULL); 952212038Spjd if (FD_ISSET(proto_descriptor(res->hr_event), &rfds)) { 953212038Spjd if (event_recv(res) == 0) 954212038Spjd continue; 955212038Spjd /* The worker process exited? */ 956212038Spjd proto_close(res->hr_event); 957212038Spjd res->hr_event = NULL; 958218218Spjd proto_close(res->hr_conn); 959218218Spjd res->hr_conn = NULL; 960218218Spjd continue; 961212038Spjd } 962218218Spjd if (res->hr_role == HAST_ROLE_PRIMARY && 963218218Spjd FD_ISSET(proto_descriptor(res->hr_conn), &rfds)) { 964218218Spjd connection_migrate(res); 965218218Spjd } 966212038Spjd } 967204076Spjd } 968204076Spjd} 969204076Spjd 970213428Spjdstatic void 971213428Spjddummy_sighandler(int sig __unused) 972213428Spjd{ 973213428Spjd /* Nothing to do. */ 974213428Spjd} 975213428Spjd 976204076Spjdint 977204076Spjdmain(int argc, char *argv[]) 978204076Spjd{ 979204076Spjd const char *pidfile; 980204076Spjd pid_t otherpid; 981204076Spjd bool foreground; 982204076Spjd int debuglevel; 983213009Spjd sigset_t mask; 984204076Spjd 985204076Spjd foreground = false; 986204076Spjd debuglevel = 0; 987204076Spjd pidfile = HASTD_PIDFILE; 988204076Spjd 989204076Spjd for (;;) { 990204076Spjd int ch; 991204076Spjd 992204076Spjd ch = getopt(argc, argv, "c:dFhP:"); 993204076Spjd if (ch == -1) 994204076Spjd break; 995204076Spjd switch (ch) { 996204076Spjd case 'c': 997204076Spjd cfgpath = optarg; 998204076Spjd break; 999204076Spjd case 'd': 1000204076Spjd debuglevel++; 1001204076Spjd break; 1002204076Spjd case 'F': 1003204076Spjd foreground = true; 1004204076Spjd break; 1005204076Spjd case 'P': 1006204076Spjd pidfile = optarg; 1007204076Spjd break; 1008204076Spjd case 'h': 1009204076Spjd default: 1010204076Spjd usage(); 1011204076Spjd } 1012204076Spjd } 1013204076Spjd argc -= optind; 1014204076Spjd argv += optind; 1015204076Spjd 1016217965Spjd pjdlog_init(PJDLOG_MODE_STD); 1017204076Spjd pjdlog_debug_set(debuglevel); 1018204076Spjd 1019214273Spjd g_gate_load(); 1020214273Spjd 1021204076Spjd pfh = pidfile_open(pidfile, 0600, &otherpid); 1022204076Spjd if (pfh == NULL) { 1023204076Spjd if (errno == EEXIST) { 1024204076Spjd pjdlog_exitx(EX_TEMPFAIL, 1025204076Spjd "Another hastd is already running, pid: %jd.", 1026204076Spjd (intmax_t)otherpid); 1027204076Spjd } 1028204076Spjd /* If we cannot create pidfile from other reasons, only warn. */ 1029210879Spjd pjdlog_errno(LOG_WARNING, "Unable to open or create pidfile"); 1030204076Spjd } 1031204076Spjd 1032210883Spjd cfg = yy_config_parse(cfgpath, true); 1033218138Spjd PJDLOG_ASSERT(cfg != NULL); 1034204076Spjd 1035213428Spjd /* 1036217307Spjd * Restore default actions for interesting signals in case parent 1037217307Spjd * process (like init(8)) decided to ignore some of them (like SIGHUP). 1038217307Spjd */ 1039217307Spjd PJDLOG_VERIFY(signal(SIGHUP, SIG_DFL) != SIG_ERR); 1040217307Spjd PJDLOG_VERIFY(signal(SIGINT, SIG_DFL) != SIG_ERR); 1041217307Spjd PJDLOG_VERIFY(signal(SIGTERM, SIG_DFL) != SIG_ERR); 1042217307Spjd /* 1043213428Spjd * Because SIGCHLD is ignored by default, setup dummy handler for it, 1044213428Spjd * so we can mask it. 1045213428Spjd */ 1046213428Spjd PJDLOG_VERIFY(signal(SIGCHLD, dummy_sighandler) != SIG_ERR); 1047217307Spjd 1048213009Spjd PJDLOG_VERIFY(sigemptyset(&mask) == 0); 1049213009Spjd PJDLOG_VERIFY(sigaddset(&mask, SIGHUP) == 0); 1050213009Spjd PJDLOG_VERIFY(sigaddset(&mask, SIGINT) == 0); 1051213009Spjd PJDLOG_VERIFY(sigaddset(&mask, SIGTERM) == 0); 1052213009Spjd PJDLOG_VERIFY(sigaddset(&mask, SIGCHLD) == 0); 1053213009Spjd PJDLOG_VERIFY(sigprocmask(SIG_SETMASK, &mask, NULL) == 0); 1054204076Spjd 1055204076Spjd /* Listen on control address. */ 1056204076Spjd if (proto_server(cfg->hc_controladdr, &cfg->hc_controlconn) < 0) { 1057204076Spjd KEEP_ERRNO((void)pidfile_remove(pfh)); 1058204076Spjd pjdlog_exit(EX_OSERR, "Unable to listen on control address %s", 1059204076Spjd cfg->hc_controladdr); 1060204076Spjd } 1061204076Spjd /* Listen for remote connections. */ 1062204076Spjd if (proto_server(cfg->hc_listenaddr, &cfg->hc_listenconn) < 0) { 1063204076Spjd KEEP_ERRNO((void)pidfile_remove(pfh)); 1064204076Spjd pjdlog_exit(EX_OSERR, "Unable to listen on address %s", 1065204076Spjd cfg->hc_listenaddr); 1066204076Spjd } 1067204076Spjd 1068204076Spjd if (!foreground) { 1069204076Spjd if (daemon(0, 0) < 0) { 1070204076Spjd KEEP_ERRNO((void)pidfile_remove(pfh)); 1071204076Spjd pjdlog_exit(EX_OSERR, "Unable to daemonize"); 1072204076Spjd } 1073204076Spjd 1074204076Spjd /* Start logging to syslog. */ 1075204076Spjd pjdlog_mode_set(PJDLOG_MODE_SYSLOG); 1076204076Spjd 1077204076Spjd /* Write PID to a file. */ 1078204076Spjd if (pidfile_write(pfh) < 0) { 1079204076Spjd pjdlog_errno(LOG_WARNING, 1080204076Spjd "Unable to write PID to a file"); 1081204076Spjd } 1082204076Spjd } 1083204076Spjd 1084211977Spjd hook_init(); 1085211977Spjd 1086204076Spjd main_loop(); 1087204076Spjd 1088204076Spjd exit(0); 1089204076Spjd} 1090