| |
| /* |
| * Copyright (C) Igor Sysoev |
| * Copyright (C) Nginx, Inc. |
| */ |
| |
| |
| #include <ngx_config.h> |
| #include <ngx_core.h> |
| #include <ngx_event.h> |
| #include <ngx_channel.h> |
| |
| |
| static void ngx_start_worker_processes(ngx_cycle_t *cycle, ngx_int_t n, |
| ngx_int_t type); |
| static void ngx_start_cache_manager_processes(ngx_cycle_t *cycle, |
| ngx_uint_t respawn); |
| static void ngx_pass_open_channel(ngx_cycle_t *cycle, ngx_channel_t *ch); |
| static void ngx_signal_worker_processes(ngx_cycle_t *cycle, int signo); |
| static ngx_uint_t ngx_reap_children(ngx_cycle_t *cycle); |
| static void ngx_master_process_exit(ngx_cycle_t *cycle); |
| static void ngx_worker_process_cycle(ngx_cycle_t *cycle, void *data); |
| static void ngx_worker_process_init(ngx_cycle_t *cycle, ngx_int_t worker); |
| static void ngx_worker_process_exit(ngx_cycle_t *cycle); |
| static void ngx_channel_handler(ngx_event_t *ev); |
| #if (NGX_THREADS) |
| static void ngx_wakeup_worker_threads(ngx_cycle_t *cycle); |
| static ngx_thread_value_t ngx_worker_thread_cycle(void *data); |
| #endif |
| static void ngx_cache_manager_process_cycle(ngx_cycle_t *cycle, void *data); |
| static void ngx_cache_manager_process_handler(ngx_event_t *ev); |
| static void ngx_cache_loader_process_handler(ngx_event_t *ev); |
| |
| |
| ngx_uint_t ngx_process; |
| ngx_pid_t ngx_pid; |
| ngx_uint_t ngx_threaded; |
| |
| sig_atomic_t ngx_reap; |
| sig_atomic_t ngx_sigio; |
| sig_atomic_t ngx_sigalrm; |
| sig_atomic_t ngx_terminate; |
| sig_atomic_t ngx_quit; |
| sig_atomic_t ngx_debug_quit; |
| ngx_uint_t ngx_exiting; |
| sig_atomic_t ngx_reconfigure; |
| sig_atomic_t ngx_reopen; |
| |
| sig_atomic_t ngx_change_binary; |
| ngx_pid_t ngx_new_binary; |
| ngx_uint_t ngx_inherited; |
| ngx_uint_t ngx_daemonized; |
| |
| sig_atomic_t ngx_noaccept; |
| ngx_uint_t ngx_noaccepting; |
| ngx_uint_t ngx_restart; |
| |
| |
| #if (NGX_THREADS) |
| volatile ngx_thread_t ngx_threads[NGX_MAX_THREADS]; |
| ngx_int_t ngx_threads_n; |
| #endif |
| |
| |
| static u_char master_process[] = "master process"; |
| |
| |
| static ngx_cache_manager_ctx_t ngx_cache_manager_ctx = { |
| ngx_cache_manager_process_handler, "cache manager process", 0 |
| }; |
| |
| static ngx_cache_manager_ctx_t ngx_cache_loader_ctx = { |
| ngx_cache_loader_process_handler, "cache loader process", 60000 |
| }; |
| |
| |
| static ngx_cycle_t ngx_exit_cycle; |
| static ngx_log_t ngx_exit_log; |
| static ngx_open_file_t ngx_exit_log_file; |
| |
| |
| void |
| ngx_master_process_cycle(ngx_cycle_t *cycle) |
| { |
| char *title; |
| u_char *p; |
| size_t size; |
| ngx_int_t i; |
| ngx_uint_t n, sigio; |
| sigset_t set; |
| struct itimerval itv; |
| ngx_uint_t live; |
| ngx_msec_t delay; |
| ngx_listening_t *ls; |
| ngx_core_conf_t *ccf; |
| |
| sigemptyset(&set); |
| sigaddset(&set, SIGCHLD); |
| sigaddset(&set, SIGALRM); |
| sigaddset(&set, SIGIO); |
| sigaddset(&set, SIGINT); |
| sigaddset(&set, ngx_signal_value(NGX_RECONFIGURE_SIGNAL)); |
| sigaddset(&set, ngx_signal_value(NGX_REOPEN_SIGNAL)); |
| sigaddset(&set, ngx_signal_value(NGX_NOACCEPT_SIGNAL)); |
| sigaddset(&set, ngx_signal_value(NGX_TERMINATE_SIGNAL)); |
| sigaddset(&set, ngx_signal_value(NGX_SHUTDOWN_SIGNAL)); |
| sigaddset(&set, ngx_signal_value(NGX_CHANGEBIN_SIGNAL)); |
| |
| if (sigprocmask(SIG_BLOCK, &set, NULL) == -1) { |
| ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, |
| "sigprocmask() failed"); |
| } |
| |
| sigemptyset(&set); |
| |
| |
| size = sizeof(master_process); |
| |
| for (i = 0; i < ngx_argc; i++) { |
| size += ngx_strlen(ngx_argv[i]) + 1; |
| } |
| |
| title = ngx_pnalloc(cycle->pool, size); |
| |
| p = ngx_cpymem(title, master_process, sizeof(master_process) - 1); |
| for (i = 0; i < ngx_argc; i++) { |
| *p++ = ' '; |
| p = ngx_cpystrn(p, (u_char *) ngx_argv[i], size); |
| } |
| |
| ngx_setproctitle(title); |
| |
| |
| ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx, ngx_core_module); |
| |
| ngx_start_worker_processes(cycle, ccf->worker_processes, |
| NGX_PROCESS_RESPAWN); |
| ngx_start_cache_manager_processes(cycle, 0); |
| |
| ngx_new_binary = 0; |
| delay = 0; |
| sigio = 0; |
| live = 1; |
| |
| for ( ;; ) { |
| if (delay) { |
| if (ngx_sigalrm) { |
| sigio = 0; |
| delay *= 2; |
| ngx_sigalrm = 0; |
| } |
| |
| ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0, |
| "termination cycle: %d", delay); |
| |
| itv.it_interval.tv_sec = 0; |
| itv.it_interval.tv_usec = 0; |
| itv.it_value.tv_sec = delay / 1000; |
| itv.it_value.tv_usec = (delay % 1000 ) * 1000; |
| |
| if (setitimer(ITIMER_REAL, &itv, NULL) == -1) { |
| ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, |
| "setitimer() failed"); |
| } |
| } |
| |
| ngx_log_debug0(NGX_LOG_DEBUG_EVENT, cycle->log, 0, "sigsuspend"); |
| |
| sigsuspend(&set); |
| |
| ngx_time_update(); |
| |
| ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0, |
| "wake up, sigio %i", sigio); |
| |
| if (ngx_reap) { |
| ngx_reap = 0; |
| ngx_log_debug0(NGX_LOG_DEBUG_EVENT, cycle->log, 0, "reap children"); |
| |
| live = ngx_reap_children(cycle); |
| } |
| |
| if (!live && (ngx_terminate || ngx_quit)) { |
| ngx_master_process_exit(cycle); |
| } |
| |
| if (ngx_terminate) { |
| if (delay == 0) { |
| delay = 50; |
| } |
| |
| if (sigio) { |
| sigio--; |
| continue; |
| } |
| |
| sigio = ccf->worker_processes + 2 /* cache processes */; |
| |
| if (delay > 1000) { |
| ngx_signal_worker_processes(cycle, SIGKILL); |
| } else { |
| ngx_signal_worker_processes(cycle, |
| ngx_signal_value(NGX_TERMINATE_SIGNAL)); |
| } |
| |
| continue; |
| } |
| |
| if (ngx_quit) { |
| ngx_signal_worker_processes(cycle, |
| ngx_signal_value(NGX_SHUTDOWN_SIGNAL)); |
| |
| ls = cycle->listening.elts; |
| for (n = 0; n < cycle->listening.nelts; n++) { |
| if (ngx_close_socket(ls[n].fd) == -1) { |
| ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_socket_errno, |
| ngx_close_socket_n " %V failed", |
| &ls[n].addr_text); |
| } |
| } |
| cycle->listening.nelts = 0; |
| |
| continue; |
| } |
| |
| if (ngx_reconfigure) { |
| ngx_reconfigure = 0; |
| |
| if (ngx_new_binary) { |
| ngx_start_worker_processes(cycle, ccf->worker_processes, |
| NGX_PROCESS_RESPAWN); |
| ngx_start_cache_manager_processes(cycle, 0); |
| ngx_noaccepting = 0; |
| |
| continue; |
| } |
| |
| ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "reconfiguring"); |
| |
| cycle = ngx_init_cycle(cycle); |
| if (cycle == NULL) { |
| cycle = (ngx_cycle_t *) ngx_cycle; |
| continue; |
| } |
| |
| ngx_cycle = cycle; |
| ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx, |
| ngx_core_module); |
| ngx_start_worker_processes(cycle, ccf->worker_processes, |
| NGX_PROCESS_JUST_RESPAWN); |
| ngx_start_cache_manager_processes(cycle, 1); |
| |
| /* allow new processes to start */ |
| ngx_msleep(100); |
| |
| live = 1; |
| ngx_signal_worker_processes(cycle, |
| ngx_signal_value(NGX_SHUTDOWN_SIGNAL)); |
| } |
| |
| if (ngx_restart) { |
| ngx_restart = 0; |
| ngx_start_worker_processes(cycle, ccf->worker_processes, |
| NGX_PROCESS_RESPAWN); |
| ngx_start_cache_manager_processes(cycle, 0); |
| live = 1; |
| } |
| |
| if (ngx_reopen) { |
| ngx_reopen = 0; |
| ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "reopening logs"); |
| ngx_reopen_files(cycle, ccf->user); |
| ngx_signal_worker_processes(cycle, |
| ngx_signal_value(NGX_REOPEN_SIGNAL)); |
| } |
| |
| if (ngx_change_binary) { |
| ngx_change_binary = 0; |
| ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "changing binary"); |
| ngx_new_binary = ngx_exec_new_binary(cycle, ngx_argv); |
| } |
| |
| if (ngx_noaccept) { |
| ngx_noaccept = 0; |
| ngx_noaccepting = 1; |
| ngx_signal_worker_processes(cycle, |
| ngx_signal_value(NGX_SHUTDOWN_SIGNAL)); |
| } |
| } |
| } |
| |
| |
| void |
| ngx_single_process_cycle(ngx_cycle_t *cycle) |
| { |
| ngx_uint_t i; |
| |
| if (ngx_set_environment(cycle, NULL) == NULL) { |
| /* fatal */ |
| exit(2); |
| } |
| |
| for (i = 0; ngx_modules[i]; i++) { |
| if (ngx_modules[i]->init_process) { |
| if (ngx_modules[i]->init_process(cycle) == NGX_ERROR) { |
| /* fatal */ |
| exit(2); |
| } |
| } |
| } |
| |
| for ( ;; ) { |
| ngx_log_debug0(NGX_LOG_DEBUG_EVENT, cycle->log, 0, "worker cycle"); |
| |
| ngx_process_events_and_timers(cycle); |
| |
| if (ngx_terminate || ngx_quit) { |
| |
| for (i = 0; ngx_modules[i]; i++) { |
| if (ngx_modules[i]->exit_process) { |
| ngx_modules[i]->exit_process(cycle); |
| } |
| } |
| |
| ngx_master_process_exit(cycle); |
| } |
| |
| if (ngx_reconfigure) { |
| ngx_reconfigure = 0; |
| ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "reconfiguring"); |
| |
| cycle = ngx_init_cycle(cycle); |
| if (cycle == NULL) { |
| cycle = (ngx_cycle_t *) ngx_cycle; |
| continue; |
| } |
| |
| ngx_cycle = cycle; |
| } |
| |
| if (ngx_reopen) { |
| ngx_reopen = 0; |
| ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "reopening logs"); |
| ngx_reopen_files(cycle, (ngx_uid_t) -1); |
| } |
| } |
| } |
| |
| |
| static void |
| ngx_start_worker_processes(ngx_cycle_t *cycle, ngx_int_t n, ngx_int_t type) |
| { |
| ngx_int_t i; |
| ngx_channel_t ch; |
| |
| ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "start worker processes"); |
| |
| ngx_memzero(&ch, sizeof(ngx_channel_t)); |
| |
| ch.command = NGX_CMD_OPEN_CHANNEL; |
| |
| for (i = 0; i < n; i++) { |
| |
| ngx_spawn_process(cycle, ngx_worker_process_cycle, |
| (void *) (intptr_t) i, "worker process", type); |
| |
| ch.pid = ngx_processes[ngx_process_slot].pid; |
| ch.slot = ngx_process_slot; |
| ch.fd = ngx_processes[ngx_process_slot].channel[0]; |
| |
| ngx_pass_open_channel(cycle, &ch); |
| } |
| } |
| |
| |
| static void |
| ngx_start_cache_manager_processes(ngx_cycle_t *cycle, ngx_uint_t respawn) |
| { |
| ngx_uint_t i, manager, loader; |
| ngx_path_t **path; |
| ngx_channel_t ch; |
| |
| manager = 0; |
| loader = 0; |
| |
| path = ngx_cycle->paths.elts; |
| for (i = 0; i < ngx_cycle->paths.nelts; i++) { |
| |
| if (path[i]->manager) { |
| manager = 1; |
| } |
| |
| if (path[i]->loader) { |
| loader = 1; |
| } |
| } |
| |
| if (manager == 0) { |
| return; |
| } |
| |
| ngx_spawn_process(cycle, ngx_cache_manager_process_cycle, |
| &ngx_cache_manager_ctx, "cache manager process", |
| respawn ? NGX_PROCESS_JUST_RESPAWN : NGX_PROCESS_RESPAWN); |
| |
| ngx_memzero(&ch, sizeof(ngx_channel_t)); |
| |
| ch.command = NGX_CMD_OPEN_CHANNEL; |
| ch.pid = ngx_processes[ngx_process_slot].pid; |
| ch.slot = ngx_process_slot; |
| ch.fd = ngx_processes[ngx_process_slot].channel[0]; |
| |
| ngx_pass_open_channel(cycle, &ch); |
| |
| if (loader == 0) { |
| return; |
| } |
| |
| ngx_spawn_process(cycle, ngx_cache_manager_process_cycle, |
| &ngx_cache_loader_ctx, "cache loader process", |
| respawn ? NGX_PROCESS_JUST_SPAWN : NGX_PROCESS_NORESPAWN); |
| |
| ch.command = NGX_CMD_OPEN_CHANNEL; |
| ch.pid = ngx_processes[ngx_process_slot].pid; |
| ch.slot = ngx_process_slot; |
| ch.fd = ngx_processes[ngx_process_slot].channel[0]; |
| |
| ngx_pass_open_channel(cycle, &ch); |
| } |
| |
| |
| static void |
| ngx_pass_open_channel(ngx_cycle_t *cycle, ngx_channel_t *ch) |
| { |
| ngx_int_t i; |
| |
| for (i = 0; i < ngx_last_process; i++) { |
| |
| if (i == ngx_process_slot |
| || ngx_processes[i].pid == -1 |
| || ngx_processes[i].channel[0] == -1) |
| { |
| continue; |
| } |
| |
| ngx_log_debug6(NGX_LOG_DEBUG_CORE, cycle->log, 0, |
| "pass channel s:%d pid:%P fd:%d to s:%i pid:%P fd:%d", |
| ch->slot, ch->pid, ch->fd, |
| i, ngx_processes[i].pid, |
| ngx_processes[i].channel[0]); |
| |
| /* TODO: NGX_AGAIN */ |
| |
| ngx_write_channel(ngx_processes[i].channel[0], |
| ch, sizeof(ngx_channel_t), cycle->log); |
| } |
| } |
| |
| |
| static void |
| ngx_signal_worker_processes(ngx_cycle_t *cycle, int signo) |
| { |
| ngx_int_t i; |
| ngx_err_t err; |
| ngx_channel_t ch; |
| |
| ngx_memzero(&ch, sizeof(ngx_channel_t)); |
| |
| #if (NGX_BROKEN_SCM_RIGHTS) |
| |
| ch.command = 0; |
| |
| #else |
| |
| switch (signo) { |
| |
| case ngx_signal_value(NGX_SHUTDOWN_SIGNAL): |
| ch.command = NGX_CMD_QUIT; |
| break; |
| |
| case ngx_signal_value(NGX_TERMINATE_SIGNAL): |
| ch.command = NGX_CMD_TERMINATE; |
| break; |
| |
| case ngx_signal_value(NGX_REOPEN_SIGNAL): |
| ch.command = NGX_CMD_REOPEN; |
| break; |
| |
| default: |
| ch.command = 0; |
| } |
| |
| #endif |
| |
| ch.fd = -1; |
| |
| |
| for (i = 0; i < ngx_last_process; i++) { |
| |
| ngx_log_debug7(NGX_LOG_DEBUG_EVENT, cycle->log, 0, |
| "child: %d %P e:%d t:%d d:%d r:%d j:%d", |
| i, |
| ngx_processes[i].pid, |
| ngx_processes[i].exiting, |
| ngx_processes[i].exited, |
| ngx_processes[i].detached, |
| ngx_processes[i].respawn, |
| ngx_processes[i].just_spawn); |
| |
| if (ngx_processes[i].detached || ngx_processes[i].pid == -1) { |
| continue; |
| } |
| |
| if (ngx_processes[i].just_spawn) { |
| ngx_processes[i].just_spawn = 0; |
| continue; |
| } |
| |
| if (ngx_processes[i].exiting |
| && signo == ngx_signal_value(NGX_SHUTDOWN_SIGNAL)) |
| { |
| continue; |
| } |
| |
| if (ch.command) { |
| if (ngx_write_channel(ngx_processes[i].channel[0], |
| &ch, sizeof(ngx_channel_t), cycle->log) |
| == NGX_OK) |
| { |
| if (signo != ngx_signal_value(NGX_REOPEN_SIGNAL)) { |
| ngx_processes[i].exiting = 1; |
| } |
| |
| continue; |
| } |
| } |
| |
| ngx_log_debug2(NGX_LOG_DEBUG_CORE, cycle->log, 0, |
| "kill (%P, %d)", ngx_processes[i].pid, signo); |
| |
| if (kill(ngx_processes[i].pid, signo) == -1) { |
| err = ngx_errno; |
| ngx_log_error(NGX_LOG_ALERT, cycle->log, err, |
| "kill(%P, %d) failed", ngx_processes[i].pid, signo); |
| |
| if (err == NGX_ESRCH) { |
| ngx_processes[i].exited = 1; |
| ngx_processes[i].exiting = 0; |
| ngx_reap = 1; |
| } |
| |
| continue; |
| } |
| |
| if (signo != ngx_signal_value(NGX_REOPEN_SIGNAL)) { |
| ngx_processes[i].exiting = 1; |
| } |
| } |
| } |
| |
| |
| static ngx_uint_t |
| ngx_reap_children(ngx_cycle_t *cycle) |
| { |
| ngx_int_t i, n; |
| ngx_uint_t live; |
| ngx_channel_t ch; |
| ngx_core_conf_t *ccf; |
| |
| ngx_memzero(&ch, sizeof(ngx_channel_t)); |
| |
| ch.command = NGX_CMD_CLOSE_CHANNEL; |
| ch.fd = -1; |
| |
| live = 0; |
| for (i = 0; i < ngx_last_process; i++) { |
| |
| ngx_log_debug7(NGX_LOG_DEBUG_EVENT, cycle->log, 0, |
| "child: %d %P e:%d t:%d d:%d r:%d j:%d", |
| i, |
| ngx_processes[i].pid, |
| ngx_processes[i].exiting, |
| ngx_processes[i].exited, |
| ngx_processes[i].detached, |
| ngx_processes[i].respawn, |
| ngx_processes[i].just_spawn); |
| |
| if (ngx_processes[i].pid == -1) { |
| continue; |
| } |
| |
| if (ngx_processes[i].exited) { |
| |
| if (!ngx_processes[i].detached) { |
| ngx_close_channel(ngx_processes[i].channel, cycle->log); |
| |
| ngx_processes[i].channel[0] = -1; |
| ngx_processes[i].channel[1] = -1; |
| |
| ch.pid = ngx_processes[i].pid; |
| ch.slot = i; |
| |
| for (n = 0; n < ngx_last_process; n++) { |
| if (ngx_processes[n].exited |
| || ngx_processes[n].pid == -1 |
| || ngx_processes[n].channel[0] == -1) |
| { |
| continue; |
| } |
| |
| ngx_log_debug3(NGX_LOG_DEBUG_CORE, cycle->log, 0, |
| "pass close channel s:%i pid:%P to:%P", |
| ch.slot, ch.pid, ngx_processes[n].pid); |
| |
| /* TODO: NGX_AGAIN */ |
| |
| ngx_write_channel(ngx_processes[n].channel[0], |
| &ch, sizeof(ngx_channel_t), cycle->log); |
| } |
| } |
| |
| if (ngx_processes[i].respawn |
| && !ngx_processes[i].exiting |
| && !ngx_terminate |
| && !ngx_quit) |
| { |
| if (ngx_spawn_process(cycle, ngx_processes[i].proc, |
| ngx_processes[i].data, |
| ngx_processes[i].name, i) |
| == NGX_INVALID_PID) |
| { |
| ngx_log_error(NGX_LOG_ALERT, cycle->log, 0, |
| "could not respawn %s", |
| ngx_processes[i].name); |
| continue; |
| } |
| |
| |
| ch.command = NGX_CMD_OPEN_CHANNEL; |
| ch.pid = ngx_processes[ngx_process_slot].pid; |
| ch.slot = ngx_process_slot; |
| ch.fd = ngx_processes[ngx_process_slot].channel[0]; |
| |
| ngx_pass_open_channel(cycle, &ch); |
| |
| live = 1; |
| |
| continue; |
| } |
| |
| if (ngx_processes[i].pid == ngx_new_binary) { |
| |
| ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx, |
| ngx_core_module); |
| |
| if (ngx_rename_file((char *) ccf->oldpid.data, |
| (char *) ccf->pid.data) |
| == NGX_FILE_ERROR) |
| { |
| ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, |
| ngx_rename_file_n " %s back to %s failed " |
| "after the new binary process \"%s\" exited", |
| ccf->oldpid.data, ccf->pid.data, ngx_argv[0]); |
| } |
| |
| ngx_new_binary = 0; |
| if (ngx_noaccepting) { |
| ngx_restart = 1; |
| ngx_noaccepting = 0; |
| } |
| } |
| |
| if (i == ngx_last_process - 1) { |
| ngx_last_process--; |
| |
| } else { |
| ngx_processes[i].pid = -1; |
| } |
| |
| } else if (ngx_processes[i].exiting || !ngx_processes[i].detached) { |
| live = 1; |
| } |
| } |
| |
| return live; |
| } |
| |
| |
| static void |
| ngx_master_process_exit(ngx_cycle_t *cycle) |
| { |
| ngx_uint_t i; |
| |
| ngx_delete_pidfile(cycle); |
| |
| ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "exit"); |
| |
| for (i = 0; ngx_modules[i]; i++) { |
| if (ngx_modules[i]->exit_master) { |
| ngx_modules[i]->exit_master(cycle); |
| } |
| } |
| |
| ngx_close_listening_sockets(cycle); |
| |
| /* |
| * Copy ngx_cycle->log related data to the special static exit cycle, |
| * log, and log file structures enough to allow a signal handler to log. |
| * The handler may be called when standard ngx_cycle->log allocated from |
| * ngx_cycle->pool is already destroyed. |
| */ |
| |
| ngx_exit_log_file.fd = ngx_cycle->log->file->fd; |
| |
| ngx_exit_log = *ngx_cycle->log; |
| ngx_exit_log.file = &ngx_exit_log_file; |
| ngx_exit_log.next = NULL; |
| |
| ngx_exit_cycle.log = &ngx_exit_log; |
| ngx_exit_cycle.files = ngx_cycle->files; |
| ngx_exit_cycle.files_n = ngx_cycle->files_n; |
| ngx_cycle = &ngx_exit_cycle; |
| |
| ngx_destroy_pool(cycle->pool); |
| |
| exit(0); |
| } |
| |
| |
| static void |
| ngx_worker_process_cycle(ngx_cycle_t *cycle, void *data) |
| { |
| ngx_int_t worker = (intptr_t) data; |
| |
| ngx_uint_t i; |
| ngx_connection_t *c; |
| |
| ngx_process = NGX_PROCESS_WORKER; |
| |
| ngx_worker_process_init(cycle, worker); |
| |
| ngx_setproctitle("worker process"); |
| |
| #if (NGX_THREADS) |
| { |
| ngx_int_t n; |
| ngx_err_t err; |
| ngx_core_conf_t *ccf; |
| |
| ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx, ngx_core_module); |
| |
| if (ngx_threads_n) { |
| if (ngx_init_threads(ngx_threads_n, ccf->thread_stack_size, cycle) |
| == NGX_ERROR) |
| { |
| /* fatal */ |
| exit(2); |
| } |
| |
| err = ngx_thread_key_create(&ngx_core_tls_key); |
| if (err != 0) { |
| ngx_log_error(NGX_LOG_ALERT, cycle->log, err, |
| ngx_thread_key_create_n " failed"); |
| /* fatal */ |
| exit(2); |
| } |
| |
| for (n = 0; n < ngx_threads_n; n++) { |
| |
| ngx_threads[n].cv = ngx_cond_init(cycle->log); |
| |
| if (ngx_threads[n].cv == NULL) { |
| /* fatal */ |
| exit(2); |
| } |
| |
| if (ngx_create_thread((ngx_tid_t *) &ngx_threads[n].tid, |
| ngx_worker_thread_cycle, |
| (void *) &ngx_threads[n], cycle->log) |
| != 0) |
| { |
| /* fatal */ |
| exit(2); |
| } |
| } |
| } |
| } |
| #endif |
| |
| for ( ;; ) { |
| |
| if (ngx_exiting) { |
| |
| c = cycle->connections; |
| |
| for (i = 0; i < cycle->connection_n; i++) { |
| |
| /* THREAD: lock */ |
| |
| if (c[i].fd != -1 && c[i].idle) { |
| c[i].close = 1; |
| c[i].read->handler(c[i].read); |
| } |
| } |
| |
| if (ngx_event_timer_rbtree.root == ngx_event_timer_rbtree.sentinel) |
| { |
| ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "exiting"); |
| |
| ngx_worker_process_exit(cycle); |
| } |
| } |
| |
| ngx_log_debug0(NGX_LOG_DEBUG_EVENT, cycle->log, 0, "worker cycle"); |
| |
| ngx_process_events_and_timers(cycle); |
| |
| if (ngx_terminate) { |
| ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "exiting"); |
| |
| ngx_worker_process_exit(cycle); |
| } |
| |
| if (ngx_quit) { |
| ngx_quit = 0; |
| ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, |
| "gracefully shutting down"); |
| ngx_setproctitle("worker process is shutting down"); |
| |
| if (!ngx_exiting) { |
| ngx_close_listening_sockets(cycle); |
| ngx_exiting = 1; |
| } |
| } |
| |
| if (ngx_reopen) { |
| ngx_reopen = 0; |
| ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "reopening logs"); |
| ngx_reopen_files(cycle, -1); |
| } |
| } |
| } |
| |
| |
| static void |
| ngx_worker_process_init(ngx_cycle_t *cycle, ngx_int_t worker) |
| { |
| sigset_t set; |
| uint64_t cpu_affinity; |
| ngx_int_t n; |
| ngx_uint_t i; |
| struct rlimit rlmt; |
| ngx_core_conf_t *ccf; |
| ngx_listening_t *ls; |
| |
| if (ngx_set_environment(cycle, NULL) == NULL) { |
| /* fatal */ |
| exit(2); |
| } |
| |
| ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx, ngx_core_module); |
| |
| if (worker >= 0 && ccf->priority != 0) { |
| if (setpriority(PRIO_PROCESS, 0, ccf->priority) == -1) { |
| ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, |
| "setpriority(%d) failed", ccf->priority); |
| } |
| } |
| |
| if (ccf->rlimit_nofile != NGX_CONF_UNSET) { |
| rlmt.rlim_cur = (rlim_t) ccf->rlimit_nofile; |
| rlmt.rlim_max = (rlim_t) ccf->rlimit_nofile; |
| |
| if (setrlimit(RLIMIT_NOFILE, &rlmt) == -1) { |
| ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, |
| "setrlimit(RLIMIT_NOFILE, %i) failed", |
| ccf->rlimit_nofile); |
| } |
| } |
| |
| if (ccf->rlimit_core != NGX_CONF_UNSET) { |
| rlmt.rlim_cur = (rlim_t) ccf->rlimit_core; |
| rlmt.rlim_max = (rlim_t) ccf->rlimit_core; |
| |
| if (setrlimit(RLIMIT_CORE, &rlmt) == -1) { |
| ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, |
| "setrlimit(RLIMIT_CORE, %O) failed", |
| ccf->rlimit_core); |
| } |
| } |
| |
| #ifdef RLIMIT_SIGPENDING |
| if (ccf->rlimit_sigpending != NGX_CONF_UNSET) { |
| rlmt.rlim_cur = (rlim_t) ccf->rlimit_sigpending; |
| rlmt.rlim_max = (rlim_t) ccf->rlimit_sigpending; |
| |
| if (setrlimit(RLIMIT_SIGPENDING, &rlmt) == -1) { |
| ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, |
| "setrlimit(RLIMIT_SIGPENDING, %i) failed", |
| ccf->rlimit_sigpending); |
| } |
| } |
| #endif |
| |
| if (geteuid() == 0) { |
| if (setgid(ccf->group) == -1) { |
| ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno, |
| "setgid(%d) failed", ccf->group); |
| /* fatal */ |
| exit(2); |
| } |
| |
| if (initgroups(ccf->username, ccf->group) == -1) { |
| ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno, |
| "initgroups(%s, %d) failed", |
| ccf->username, ccf->group); |
| } |
| |
| if (setuid(ccf->user) == -1) { |
| ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno, |
| "setuid(%d) failed", ccf->user); |
| /* fatal */ |
| exit(2); |
| } |
| } |
| |
| if (worker >= 0) { |
| cpu_affinity = ngx_get_cpu_affinity(worker); |
| |
| if (cpu_affinity) { |
| ngx_setaffinity(cpu_affinity, cycle->log); |
| } |
| } |
| |
| #if (NGX_HAVE_PR_SET_DUMPABLE) |
| |
| /* allow coredump after setuid() in Linux 2.4.x */ |
| |
| if (prctl(PR_SET_DUMPABLE, 1, 0, 0, 0) == -1) { |
| ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, |
| "prctl(PR_SET_DUMPABLE) failed"); |
| } |
| |
| #endif |
| |
| if (ccf->working_directory.len) { |
| if (chdir((char *) ccf->working_directory.data) == -1) { |
| ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, |
| "chdir(\"%s\") failed", ccf->working_directory.data); |
| /* fatal */ |
| exit(2); |
| } |
| } |
| |
| sigemptyset(&set); |
| |
| if (sigprocmask(SIG_SETMASK, &set, NULL) == -1) { |
| ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, |
| "sigprocmask() failed"); |
| } |
| |
| /* |
| * disable deleting previous events for the listening sockets because |
| * in the worker processes there are no events at all at this point |
| */ |
| ls = cycle->listening.elts; |
| for (i = 0; i < cycle->listening.nelts; i++) { |
| ls[i].previous = NULL; |
| } |
| |
| for (i = 0; ngx_modules[i]; i++) { |
| if (ngx_modules[i]->init_process) { |
| if (ngx_modules[i]->init_process(cycle) == NGX_ERROR) { |
| /* fatal */ |
| exit(2); |
| } |
| } |
| } |
| |
| for (n = 0; n < ngx_last_process; n++) { |
| |
| if (ngx_processes[n].pid == -1) { |
| continue; |
| } |
| |
| if (n == ngx_process_slot) { |
| continue; |
| } |
| |
| if (ngx_processes[n].channel[1] == -1) { |
| continue; |
| } |
| |
| if (close(ngx_processes[n].channel[1]) == -1) { |
| ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, |
| "close() channel failed"); |
| } |
| } |
| |
| if (close(ngx_processes[ngx_process_slot].channel[0]) == -1) { |
| ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, |
| "close() channel failed"); |
| } |
| |
| #if 0 |
| ngx_last_process = 0; |
| #endif |
| |
| if (ngx_add_channel_event(cycle, ngx_channel, NGX_READ_EVENT, |
| ngx_channel_handler) |
| == NGX_ERROR) |
| { |
| /* fatal */ |
| exit(2); |
| } |
| } |
| |
| |
| static void |
| ngx_worker_process_exit(ngx_cycle_t *cycle) |
| { |
| ngx_uint_t i; |
| ngx_connection_t *c; |
| |
| #if (NGX_THREADS) |
| ngx_terminate = 1; |
| |
| ngx_wakeup_worker_threads(cycle); |
| #endif |
| |
| for (i = 0; ngx_modules[i]; i++) { |
| if (ngx_modules[i]->exit_process) { |
| ngx_modules[i]->exit_process(cycle); |
| } |
| } |
| |
| if (ngx_exiting) { |
| c = cycle->connections; |
| for (i = 0; i < cycle->connection_n; i++) { |
| if (c[i].fd != -1 |
| && c[i].read |
| && !c[i].read->accept |
| && !c[i].read->channel |
| && !c[i].read->resolver) |
| { |
| ngx_log_error(NGX_LOG_ALERT, cycle->log, 0, |
| "open socket #%d left in connection %ui", |
| c[i].fd, i); |
| ngx_debug_quit = 1; |
| } |
| } |
| |
| if (ngx_debug_quit) { |
| ngx_log_error(NGX_LOG_ALERT, cycle->log, 0, "aborting"); |
| ngx_debug_point(); |
| } |
| } |
| |
| /* |
| * Copy ngx_cycle->log related data to the special static exit cycle, |
| * log, and log file structures enough to allow a signal handler to log. |
| * The handler may be called when standard ngx_cycle->log allocated from |
| * ngx_cycle->pool is already destroyed. |
| */ |
| |
| ngx_exit_log_file.fd = ngx_cycle->log->file->fd; |
| |
| ngx_exit_log = *ngx_cycle->log; |
| ngx_exit_log.file = &ngx_exit_log_file; |
| ngx_exit_log.next = NULL; |
| |
| ngx_exit_cycle.log = &ngx_exit_log; |
| ngx_exit_cycle.files = ngx_cycle->files; |
| ngx_exit_cycle.files_n = ngx_cycle->files_n; |
| ngx_cycle = &ngx_exit_cycle; |
| |
| ngx_destroy_pool(cycle->pool); |
| |
| ngx_log_error(NGX_LOG_NOTICE, ngx_cycle->log, 0, "exit"); |
| |
| exit(0); |
| } |
| |
| |
| static void |
| ngx_channel_handler(ngx_event_t *ev) |
| { |
| ngx_int_t n; |
| ngx_channel_t ch; |
| ngx_connection_t *c; |
| |
| if (ev->timedout) { |
| ev->timedout = 0; |
| return; |
| } |
| |
| c = ev->data; |
| |
| ngx_log_debug0(NGX_LOG_DEBUG_CORE, ev->log, 0, "channel handler"); |
| |
| for ( ;; ) { |
| |
| n = ngx_read_channel(c->fd, &ch, sizeof(ngx_channel_t), ev->log); |
| |
| ngx_log_debug1(NGX_LOG_DEBUG_CORE, ev->log, 0, "channel: %i", n); |
| |
| if (n == NGX_ERROR) { |
| |
| if (ngx_event_flags & NGX_USE_EPOLL_EVENT) { |
| ngx_del_conn(c, 0); |
| } |
| |
| ngx_close_connection(c); |
| return; |
| } |
| |
| if (ngx_event_flags & NGX_USE_EVENTPORT_EVENT) { |
| if (ngx_add_event(ev, NGX_READ_EVENT, 0) == NGX_ERROR) { |
| return; |
| } |
| } |
| |
| if (n == NGX_AGAIN) { |
| return; |
| } |
| |
| ngx_log_debug1(NGX_LOG_DEBUG_CORE, ev->log, 0, |
| "channel command: %d", ch.command); |
| |
| switch (ch.command) { |
| |
| case NGX_CMD_QUIT: |
| ngx_quit = 1; |
| break; |
| |
| case NGX_CMD_TERMINATE: |
| ngx_terminate = 1; |
| break; |
| |
| case NGX_CMD_REOPEN: |
| ngx_reopen = 1; |
| break; |
| |
| case NGX_CMD_OPEN_CHANNEL: |
| |
| ngx_log_debug3(NGX_LOG_DEBUG_CORE, ev->log, 0, |
| "get channel s:%i pid:%P fd:%d", |
| ch.slot, ch.pid, ch.fd); |
| |
| ngx_processes[ch.slot].pid = ch.pid; |
| ngx_processes[ch.slot].channel[0] = ch.fd; |
| break; |
| |
| case NGX_CMD_CLOSE_CHANNEL: |
| |
| ngx_log_debug4(NGX_LOG_DEBUG_CORE, ev->log, 0, |
| "close channel s:%i pid:%P our:%P fd:%d", |
| ch.slot, ch.pid, ngx_processes[ch.slot].pid, |
| ngx_processes[ch.slot].channel[0]); |
| |
| if (close(ngx_processes[ch.slot].channel[0]) == -1) { |
| ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno, |
| "close() channel failed"); |
| } |
| |
| ngx_processes[ch.slot].channel[0] = -1; |
| break; |
| } |
| } |
| } |
| |
| |
| #if (NGX_THREADS) |
| |
| static void |
| ngx_wakeup_worker_threads(ngx_cycle_t *cycle) |
| { |
| ngx_int_t i; |
| ngx_uint_t live; |
| |
| for ( ;; ) { |
| |
| live = 0; |
| |
| for (i = 0; i < ngx_threads_n; i++) { |
| if (ngx_threads[i].state < NGX_THREAD_EXIT) { |
| if (ngx_cond_signal(ngx_threads[i].cv) == NGX_ERROR) { |
| ngx_threads[i].state = NGX_THREAD_DONE; |
| |
| } else { |
| live = 1; |
| } |
| } |
| |
| if (ngx_threads[i].state == NGX_THREAD_EXIT) { |
| ngx_thread_join(ngx_threads[i].tid, NULL); |
| ngx_threads[i].state = NGX_THREAD_DONE; |
| } |
| } |
| |
| if (live == 0) { |
| ngx_log_debug0(NGX_LOG_DEBUG_CORE, cycle->log, 0, |
| "all worker threads are joined"); |
| |
| /* STUB */ |
| ngx_done_events(cycle); |
| ngx_mutex_destroy(ngx_event_timer_mutex); |
| ngx_mutex_destroy(ngx_posted_events_mutex); |
| |
| return; |
| } |
| |
| ngx_sched_yield(); |
| } |
| } |
| |
| |
| static ngx_thread_value_t |
| ngx_worker_thread_cycle(void *data) |
| { |
| ngx_thread_t *thr = data; |
| |
| sigset_t set; |
| ngx_err_t err; |
| ngx_core_tls_t *tls; |
| ngx_cycle_t *cycle; |
| |
| cycle = (ngx_cycle_t *) ngx_cycle; |
| |
| sigemptyset(&set); |
| sigaddset(&set, ngx_signal_value(NGX_RECONFIGURE_SIGNAL)); |
| sigaddset(&set, ngx_signal_value(NGX_REOPEN_SIGNAL)); |
| sigaddset(&set, ngx_signal_value(NGX_CHANGEBIN_SIGNAL)); |
| |
| err = ngx_thread_sigmask(SIG_BLOCK, &set, NULL); |
| if (err) { |
| ngx_log_error(NGX_LOG_ALERT, cycle->log, err, |
| ngx_thread_sigmask_n " failed"); |
| return (ngx_thread_value_t) 1; |
| } |
| |
| ngx_log_debug1(NGX_LOG_DEBUG_CORE, cycle->log, 0, |
| "thread " NGX_TID_T_FMT " started", ngx_thread_self()); |
| |
| ngx_setthrtitle("worker thread"); |
| |
| tls = ngx_calloc(sizeof(ngx_core_tls_t), cycle->log); |
| if (tls == NULL) { |
| return (ngx_thread_value_t) 1; |
| } |
| |
| err = ngx_thread_set_tls(ngx_core_tls_key, tls); |
| if (err != 0) { |
| ngx_log_error(NGX_LOG_ALERT, cycle->log, err, |
| ngx_thread_set_tls_n " failed"); |
| return (ngx_thread_value_t) 1; |
| } |
| |
| ngx_mutex_lock(ngx_posted_events_mutex); |
| |
| for ( ;; ) { |
| thr->state = NGX_THREAD_FREE; |
| |
| if (ngx_cond_wait(thr->cv, ngx_posted_events_mutex) == NGX_ERROR) { |
| return (ngx_thread_value_t) 1; |
| } |
| |
| if (ngx_terminate) { |
| thr->state = NGX_THREAD_EXIT; |
| |
| ngx_mutex_unlock(ngx_posted_events_mutex); |
| |
| ngx_log_debug1(NGX_LOG_DEBUG_CORE, cycle->log, 0, |
| "thread " NGX_TID_T_FMT " is done", |
| ngx_thread_self()); |
| |
| return (ngx_thread_value_t) 0; |
| } |
| |
| thr->state = NGX_THREAD_BUSY; |
| |
| if (ngx_event_thread_process_posted(cycle) == NGX_ERROR) { |
| return (ngx_thread_value_t) 1; |
| } |
| |
| if (ngx_event_thread_process_posted(cycle) == NGX_ERROR) { |
| return (ngx_thread_value_t) 1; |
| } |
| |
| if (ngx_process_changes) { |
| if (ngx_process_changes(cycle, 1) == NGX_ERROR) { |
| return (ngx_thread_value_t) 1; |
| } |
| } |
| } |
| } |
| |
| #endif |
| |
| |
| static void |
| ngx_cache_manager_process_cycle(ngx_cycle_t *cycle, void *data) |
| { |
| ngx_cache_manager_ctx_t *ctx = data; |
| |
| void *ident[4]; |
| ngx_event_t ev; |
| |
| /* |
| * Set correct process type since closing listening Unix domain socket |
| * in a master process also removes the Unix domain socket file. |
| */ |
| ngx_process = NGX_PROCESS_HELPER; |
| |
| ngx_close_listening_sockets(cycle); |
| |
| /* Set a moderate number of connections for a helper process. */ |
| cycle->connection_n = 512; |
| |
| ngx_worker_process_init(cycle, -1); |
| |
| ngx_memzero(&ev, sizeof(ngx_event_t)); |
| ev.handler = ctx->handler; |
| ev.data = ident; |
| ev.log = cycle->log; |
| ident[3] = (void *) -1; |
| |
| ngx_use_accept_mutex = 0; |
| |
| ngx_setproctitle(ctx->name); |
| |
| ngx_add_timer(&ev, ctx->delay); |
| |
| for ( ;; ) { |
| |
| if (ngx_terminate || ngx_quit) { |
| ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "exiting"); |
| exit(0); |
| } |
| |
| if (ngx_reopen) { |
| ngx_reopen = 0; |
| ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "reopening logs"); |
| ngx_reopen_files(cycle, -1); |
| } |
| |
| ngx_process_events_and_timers(cycle); |
| } |
| } |
| |
| |
| static void |
| ngx_cache_manager_process_handler(ngx_event_t *ev) |
| { |
| time_t next, n; |
| ngx_uint_t i; |
| ngx_path_t **path; |
| |
| next = 60 * 60; |
| |
| path = ngx_cycle->paths.elts; |
| for (i = 0; i < ngx_cycle->paths.nelts; i++) { |
| |
| if (path[i]->manager) { |
| n = path[i]->manager(path[i]->data); |
| |
| next = (n <= next) ? n : next; |
| |
| ngx_time_update(); |
| } |
| } |
| |
| if (next == 0) { |
| next = 1; |
| } |
| |
| ngx_add_timer(ev, next * 1000); |
| } |
| |
| |
| static void |
| ngx_cache_loader_process_handler(ngx_event_t *ev) |
| { |
| ngx_uint_t i; |
| ngx_path_t **path; |
| ngx_cycle_t *cycle; |
| |
| cycle = (ngx_cycle_t *) ngx_cycle; |
| |
| path = cycle->paths.elts; |
| for (i = 0; i < cycle->paths.nelts; i++) { |
| |
| if (ngx_terminate || ngx_quit) { |
| break; |
| } |
| |
| if (path[i]->loader) { |
| path[i]->loader(path[i]->data); |
| ngx_time_update(); |
| } |
| } |
| |
| exit(0); |
| } |