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0
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1
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2 /*
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3 * Copyright (C) Igor Sysoev
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4 */
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5
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6
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7 #include <ngx_config.h>
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8 #include <ngx_core.h>
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9 #include <ngx_event.h>
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10 #include <ngx_channel.h>
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11
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12
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13 static void ngx_start_worker_processes(ngx_cycle_t *cycle, ngx_int_t n,
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14 ngx_int_t type);
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16
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15 static void ngx_start_garbage_collector(ngx_cycle_t *cycle, ngx_int_t type);
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0
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16 static void ngx_signal_worker_processes(ngx_cycle_t *cycle, int signo);
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17 static ngx_uint_t ngx_reap_childs(ngx_cycle_t *cycle);
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2
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18 static void ngx_master_exit(ngx_cycle_t *cycle);
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0
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19 static void ngx_worker_process_cycle(ngx_cycle_t *cycle, void *data);
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22
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20 static void ngx_worker_process_init(ngx_cycle_t *cycle, ngx_uint_t priority);
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0
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21 static void ngx_channel_handler(ngx_event_t *ev);
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22 #if (NGX_THREADS)
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23 static void ngx_wakeup_worker_threads(ngx_cycle_t *cycle);
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24 static void *ngx_worker_thread_cycle(void *data);
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25 #endif
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16
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26 static void ngx_garbage_collector_cycle(ngx_cycle_t *cycle, void *data);
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0
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27
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28
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29 ngx_uint_t ngx_process;
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30 ngx_pid_t ngx_pid;
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31 ngx_uint_t ngx_threaded;
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32
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33 sig_atomic_t ngx_reap;
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34 sig_atomic_t ngx_timer;
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35 sig_atomic_t ngx_sigio;
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36 sig_atomic_t ngx_terminate;
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37 sig_atomic_t ngx_quit;
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38 ngx_uint_t ngx_exiting;
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39 sig_atomic_t ngx_reconfigure;
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40 sig_atomic_t ngx_reopen;
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41
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42 sig_atomic_t ngx_change_binary;
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43 ngx_pid_t ngx_new_binary;
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44 ngx_uint_t ngx_inherited;
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45 ngx_uint_t ngx_daemonized;
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46
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47 sig_atomic_t ngx_noaccept;
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48 ngx_uint_t ngx_noaccepting;
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49 ngx_uint_t ngx_restart;
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50
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51
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52 #if (NGX_THREADS)
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53 volatile ngx_thread_t ngx_threads[NGX_MAX_THREADS];
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54 ngx_int_t ngx_threads_n;
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55 #endif
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56
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57
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58 u_char master_process[] = "master process";
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59
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60
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2
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61 void ngx_master_process_cycle(ngx_cycle_t *cycle)
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0
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62 {
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63 char *title;
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64 u_char *p;
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65 size_t size;
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66 ngx_int_t i;
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67 sigset_t set;
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68 struct timeval tv;
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69 struct itimerval itv;
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70 ngx_uint_t live;
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71 ngx_msec_t delay;
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72 ngx_core_conf_t *ccf;
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73
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74 sigemptyset(&set);
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75 sigaddset(&set, SIGCHLD);
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76 sigaddset(&set, SIGALRM);
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77 sigaddset(&set, SIGIO);
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78 sigaddset(&set, SIGINT);
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79 sigaddset(&set, ngx_signal_value(NGX_RECONFIGURE_SIGNAL));
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80 sigaddset(&set, ngx_signal_value(NGX_REOPEN_SIGNAL));
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81 sigaddset(&set, ngx_signal_value(NGX_NOACCEPT_SIGNAL));
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82 sigaddset(&set, ngx_signal_value(NGX_TERMINATE_SIGNAL));
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83 sigaddset(&set, ngx_signal_value(NGX_SHUTDOWN_SIGNAL));
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84 sigaddset(&set, ngx_signal_value(NGX_CHANGEBIN_SIGNAL));
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85
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86 if (sigprocmask(SIG_BLOCK, &set, NULL) == -1) {
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87 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
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88 "sigprocmask() failed");
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89 }
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90
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91 sigemptyset(&set);
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92
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93
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94 size = sizeof(master_process);
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95
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2
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96 for (i = 0; i < ngx_argc; i++) {
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97 size += ngx_strlen(ngx_argv[i]) + 1;
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0
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98 }
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99
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100 title = ngx_palloc(cycle->pool, size);
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101
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102 p = ngx_cpymem(title, master_process, sizeof(master_process) - 1);
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2
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103 for (i = 0; i < ngx_argc; i++) {
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0
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104 *p++ = ' ';
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2
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105 p = ngx_cpystrn(p, (u_char *) ngx_argv[i], size);
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0
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106 }
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107
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108 ngx_setproctitle(title);
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109
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110
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111 ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx, ngx_core_module);
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112
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113 ngx_start_worker_processes(cycle, ccf->worker_processes,
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114 NGX_PROCESS_RESPAWN);
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16
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115 ngx_start_garbage_collector(cycle, NGX_PROCESS_RESPAWN);
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0
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116
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117 ngx_new_binary = 0;
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118 delay = 0;
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119 live = 1;
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120
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121 for ( ;; ) {
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122 if (delay) {
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123 delay *= 2;
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124
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125 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
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126 "temination cycle: %d", delay);
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127
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128 itv.it_interval.tv_sec = 0;
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129 itv.it_interval.tv_usec = 0;
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130 itv.it_value.tv_sec = delay / 1000;
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131 itv.it_value.tv_usec = (delay % 1000 ) * 1000;
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132
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133 if (setitimer(ITIMER_REAL, &itv, NULL) == -1) {
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134 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
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135 "setitimer() failed");
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136 }
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137 }
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138
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139 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, cycle->log, 0, "sigsuspend");
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140
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141 sigsuspend(&set);
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142
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143 ngx_gettimeofday(&tv);
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144 ngx_time_update(tv.tv_sec);
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145
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146 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, cycle->log, 0, "wake up");
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147
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148 if (ngx_reap) {
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149 ngx_reap = 0;
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150 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, cycle->log, 0, "reap childs");
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151
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152 live = ngx_reap_childs(cycle);
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153 }
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154
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155 if (!live && (ngx_terminate || ngx_quit)) {
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2
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156 ngx_master_exit(cycle);
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0
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157 }
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158
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159 if (ngx_terminate) {
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160 if (delay == 0) {
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161 delay = 50;
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162 }
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163
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164 if (delay > 1000) {
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165 ngx_signal_worker_processes(cycle, SIGKILL);
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166 } else {
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167 ngx_signal_worker_processes(cycle,
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168 ngx_signal_value(NGX_TERMINATE_SIGNAL));
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169 }
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170
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171 continue;
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172 }
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173
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174 if (ngx_quit) {
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175 ngx_signal_worker_processes(cycle,
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176 ngx_signal_value(NGX_SHUTDOWN_SIGNAL));
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177 continue;
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178 }
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179
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180 if (ngx_timer) {
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181 ngx_timer = 0;
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4
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182
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183 if (!ngx_noaccepting) {
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184 ngx_start_worker_processes(cycle, ccf->worker_processes,
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185 NGX_PROCESS_JUST_RESPAWN);
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16
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186 ngx_start_garbage_collector(cycle, NGX_PROCESS_JUST_RESPAWN);
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4
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187 live = 1;
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188 ngx_signal_worker_processes(cycle,
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0
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189 ngx_signal_value(NGX_SHUTDOWN_SIGNAL));
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4
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190 }
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0
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191 }
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192
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193 if (ngx_reconfigure) {
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194 ngx_reconfigure = 0;
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195
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196 if (ngx_new_binary) {
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197 ngx_log_error(NGX_LOG_INFO, cycle->log, 0, "start new workers");
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198
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199 ngx_start_worker_processes(cycle, ccf->worker_processes,
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200 NGX_PROCESS_RESPAWN);
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16
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201 ngx_start_garbage_collector(cycle, NGX_PROCESS_RESPAWN);
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0
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202 ngx_noaccepting = 0;
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203
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204 continue;
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205 }
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206
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207 ngx_log_error(NGX_LOG_INFO, cycle->log, 0, "reconfiguring");
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208
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209 cycle = ngx_init_cycle(cycle);
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210 if (cycle == NULL) {
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211 cycle = (ngx_cycle_t *) ngx_cycle;
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212 continue;
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213 }
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214
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215 ngx_cycle = cycle;
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216 ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx,
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217 ngx_core_module);
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218 ngx_start_worker_processes(cycle, ccf->worker_processes,
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219 NGX_PROCESS_JUST_RESPAWN);
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16
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220 ngx_start_garbage_collector(cycle, NGX_PROCESS_JUST_RESPAWN);
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0
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221 live = 1;
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222 ngx_signal_worker_processes(cycle,
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223 ngx_signal_value(NGX_SHUTDOWN_SIGNAL));
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224 }
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225
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226 if (ngx_restart) {
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227 ngx_restart = 0;
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228 ngx_start_worker_processes(cycle, ccf->worker_processes,
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229 NGX_PROCESS_RESPAWN);
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16
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230 ngx_start_garbage_collector(cycle, NGX_PROCESS_RESPAWN);
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0
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231 live = 1;
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232 }
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233
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234 if (ngx_reopen) {
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235 ngx_reopen = 0;
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236 ngx_log_error(NGX_LOG_INFO, cycle->log, 0, "reopening logs");
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237 ngx_reopen_files(cycle, ccf->user);
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238 ngx_signal_worker_processes(cycle,
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239 ngx_signal_value(NGX_REOPEN_SIGNAL));
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240 }
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241
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242 if (ngx_change_binary) {
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243 ngx_change_binary = 0;
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244 ngx_log_error(NGX_LOG_INFO, cycle->log, 0, "changing binary");
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2
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245 ngx_new_binary = ngx_exec_new_binary(cycle, ngx_argv);
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0
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246 }
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247
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248 if (ngx_noaccept) {
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249 ngx_noaccept = 0;
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250 ngx_noaccepting = 1;
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251 ngx_signal_worker_processes(cycle,
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252 ngx_signal_value(NGX_SHUTDOWN_SIGNAL));
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253 }
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254 }
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255 }
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256
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257
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2
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258 void ngx_single_process_cycle(ngx_cycle_t *cycle)
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0
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259 {
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260 ngx_uint_t i;
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261
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262 ngx_init_temp_number();
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263
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264 for (i = 0; ngx_modules[i]; i++) {
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265 if (ngx_modules[i]->init_process) {
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266 if (ngx_modules[i]->init_process(cycle) == NGX_ERROR) {
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267 /* fatal */
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268 exit(2);
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269 }
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270 }
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271 }
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272
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273 for ( ;; ) {
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274 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, cycle->log, 0, "worker cycle");
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275
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276 ngx_process_events(cycle);
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277
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278 if (ngx_terminate || ngx_quit) {
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2
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279 ngx_master_exit(cycle);
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0
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280 }
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281
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282 if (ngx_reconfigure) {
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283 ngx_reconfigure = 0;
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284 ngx_log_error(NGX_LOG_INFO, cycle->log, 0, "reconfiguring");
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285
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286 cycle = ngx_init_cycle(cycle);
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287 if (cycle == NULL) {
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288 cycle = (ngx_cycle_t *) ngx_cycle;
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289 continue;
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290 }
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291
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292 ngx_cycle = cycle;
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293 }
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294
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295 if (ngx_reopen) {
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296 ngx_reopen = 0;
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297 ngx_log_error(NGX_LOG_INFO, cycle->log, 0, "reopening logs");
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298 ngx_reopen_files(cycle, (ngx_uid_t) -1);
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299 }
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300 }
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301 }
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302
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303
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304 static void ngx_start_worker_processes(ngx_cycle_t *cycle, ngx_int_t n,
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305 ngx_int_t type)
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306 {
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307 ngx_int_t i;
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308 ngx_channel_t ch;
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309 struct itimerval itv;
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310
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311 ngx_log_error(NGX_LOG_INFO, cycle->log, 0, "start worker processes");
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312
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313 ch.command = NGX_CMD_OPEN_CHANNEL;
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314
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315 while (n--) {
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316 ngx_spawn_process(cycle, ngx_worker_process_cycle, NULL,
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317 "worker process", type);
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318
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319 ch.pid = ngx_processes[ngx_process_slot].pid;
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320 ch.slot = ngx_process_slot;
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321 ch.fd = ngx_processes[ngx_process_slot].channel[0];
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322
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323 for (i = 0; i < ngx_last_process; i++) {
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324
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325 if (i == ngx_process_slot
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326 || ngx_processes[i].pid == -1
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327 || ngx_processes[i].channel[0] == -1)
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328 {
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329 continue;
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330 }
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331
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332 ngx_log_debug6(NGX_LOG_DEBUG_CORE, cycle->log, 0,
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10
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333 "pass channel s:%d pid:%P fd:%d to s:%i pid:%P fd:%d",
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334 ch.slot, ch.pid, ch.fd,
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335 i, ngx_processes[i].pid,
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336 ngx_processes[i].channel[0]);
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0
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337
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338 /* TODO: NGX_AGAIN */
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339
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340 ngx_write_channel(ngx_processes[i].channel[0],
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341 &ch, sizeof(ngx_channel_t), cycle->log);
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342 }
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343 }
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344
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345 /*
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346 * we have to limit the maximum life time of the worker processes
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347 * by 10 days because our millisecond event timer is limited
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348 * by 24 days on 32-bit platforms
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349 */
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350
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351 itv.it_interval.tv_sec = 0;
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352 itv.it_interval.tv_usec = 0;
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353 itv.it_value.tv_sec = 10 * 24 * 60 * 60;
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354 itv.it_value.tv_usec = 0;
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355
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356 if (setitimer(ITIMER_REAL, &itv, NULL) == -1) {
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357 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
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358 "setitimer() failed");
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359 }
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360 }
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361
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362
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16
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363 static void ngx_start_garbage_collector(ngx_cycle_t *cycle, ngx_int_t type)
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364 {
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365 ngx_int_t i;
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366 ngx_channel_t ch;
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367
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368 return;
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369
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370 ngx_log_error(NGX_LOG_INFO, cycle->log, 0, "start garbage collector");
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371
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372 ch.command = NGX_CMD_OPEN_CHANNEL;
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373
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374 ngx_spawn_process(cycle, ngx_garbage_collector_cycle, NULL,
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375 "garbage collector", type);
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376
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377 ch.pid = ngx_processes[ngx_process_slot].pid;
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378 ch.slot = ngx_process_slot;
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379 ch.fd = ngx_processes[ngx_process_slot].channel[0];
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380
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381 for (i = 0; i < ngx_last_process; i++) {
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382
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383 if (i == ngx_process_slot
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384 || ngx_processes[i].pid == -1
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385 || ngx_processes[i].channel[0] == -1)
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386 {
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387 continue;
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|
|
388 }
|
|
|
389
|
|
|
390 ngx_log_debug6(NGX_LOG_DEBUG_CORE, cycle->log, 0,
|
|
|
391 "pass channel s:%d pid:%P fd:%d to s:%i pid:%P fd:%d",
|
|
|
392 ch.slot, ch.pid, ch.fd,
|
|
|
393 i, ngx_processes[i].pid,
|
|
|
394 ngx_processes[i].channel[0]);
|
|
|
395
|
|
|
396 /* TODO: NGX_AGAIN */
|
|
|
397
|
|
|
398 ngx_write_channel(ngx_processes[i].channel[0],
|
|
|
399 &ch, sizeof(ngx_channel_t), cycle->log);
|
|
|
400 }
|
|
|
401 }
|
|
|
402
|
|
|
403
|
|
0
|
404 static void ngx_signal_worker_processes(ngx_cycle_t *cycle, int signo)
|
|
|
405 {
|
|
|
406 ngx_int_t i;
|
|
|
407 ngx_err_t err;
|
|
|
408 ngx_channel_t ch;
|
|
|
409
|
|
|
410
|
|
|
411 switch (signo) {
|
|
|
412
|
|
|
413 case ngx_signal_value(NGX_SHUTDOWN_SIGNAL):
|
|
|
414 ch.command = NGX_CMD_QUIT;
|
|
|
415 break;
|
|
|
416
|
|
|
417 case ngx_signal_value(NGX_TERMINATE_SIGNAL):
|
|
|
418 ch.command = NGX_CMD_TERMINATE;
|
|
|
419 break;
|
|
|
420
|
|
|
421 case ngx_signal_value(NGX_REOPEN_SIGNAL):
|
|
|
422 ch.command = NGX_CMD_REOPEN;
|
|
|
423 break;
|
|
|
424
|
|
|
425 default:
|
|
|
426 ch.command = 0;
|
|
|
427 }
|
|
|
428
|
|
|
429 ch.fd = -1;
|
|
|
430
|
|
|
431
|
|
|
432 for (i = 0; i < ngx_last_process; i++) {
|
|
|
433
|
|
|
434 ngx_log_debug7(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
|
|
10
|
435 "child: %d %P e:%d t:%d d:%d r:%d j:%d",
|
|
0
|
436 i,
|
|
|
437 ngx_processes[i].pid,
|
|
|
438 ngx_processes[i].exiting,
|
|
|
439 ngx_processes[i].exited,
|
|
|
440 ngx_processes[i].detached,
|
|
|
441 ngx_processes[i].respawn,
|
|
|
442 ngx_processes[i].just_respawn);
|
|
|
443
|
|
|
444 if (ngx_processes[i].detached || ngx_processes[i].pid == -1) {
|
|
|
445 continue;
|
|
|
446 }
|
|
|
447
|
|
|
448 if (ngx_processes[i].just_respawn) {
|
|
|
449 ngx_processes[i].just_respawn = 0;
|
|
|
450 continue;
|
|
|
451 }
|
|
|
452
|
|
|
453 if (ngx_processes[i].exiting
|
|
|
454 && signo == ngx_signal_value(NGX_SHUTDOWN_SIGNAL))
|
|
|
455 {
|
|
|
456 continue;
|
|
|
457 }
|
|
|
458
|
|
|
459 if (ch.command) {
|
|
|
460 if (ngx_write_channel(ngx_processes[i].channel[0],
|
|
|
461 &ch, sizeof(ngx_channel_t), cycle->log) == NGX_OK)
|
|
|
462 {
|
|
|
463 if (signo != ngx_signal_value(NGX_REOPEN_SIGNAL)) {
|
|
|
464 ngx_processes[i].exiting = 1;
|
|
|
465 }
|
|
|
466
|
|
|
467 continue;
|
|
|
468 }
|
|
|
469 }
|
|
|
470
|
|
|
471 ngx_log_debug2(NGX_LOG_DEBUG_CORE, cycle->log, 0,
|
|
10
|
472 "kill (%P, %d)" , ngx_processes[i].pid, signo);
|
|
0
|
473
|
|
|
474 if (kill(ngx_processes[i].pid, signo) == -1) {
|
|
|
475 err = ngx_errno;
|
|
|
476 ngx_log_error(NGX_LOG_ALERT, cycle->log, err,
|
|
10
|
477 "kill(%P, %d) failed",
|
|
0
|
478 ngx_processes[i].pid, signo);
|
|
|
479
|
|
|
480 if (err == NGX_ESRCH) {
|
|
|
481 ngx_processes[i].exited = 1;
|
|
|
482 ngx_processes[i].exiting = 0;
|
|
|
483 ngx_reap = 1;
|
|
|
484 }
|
|
|
485
|
|
|
486 continue;
|
|
|
487 }
|
|
|
488
|
|
|
489 if (signo != ngx_signal_value(NGX_REOPEN_SIGNAL)) {
|
|
|
490 ngx_processes[i].exiting = 1;
|
|
|
491 }
|
|
|
492 }
|
|
|
493 }
|
|
|
494
|
|
|
495
|
|
|
496 static ngx_uint_t ngx_reap_childs(ngx_cycle_t *cycle)
|
|
|
497 {
|
|
|
498 ngx_int_t i, n;
|
|
|
499 ngx_uint_t live;
|
|
|
500 ngx_channel_t ch;
|
|
|
501
|
|
|
502 ch.command = NGX_CMD_CLOSE_CHANNEL;
|
|
|
503 ch.fd = -1;
|
|
|
504
|
|
|
505 live = 0;
|
|
|
506 for (i = 0; i < ngx_last_process; i++) {
|
|
|
507
|
|
|
508 ngx_log_debug7(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
|
|
10
|
509 "child: %d %P e:%d t:%d d:%d r:%d j:%d",
|
|
0
|
510 i,
|
|
|
511 ngx_processes[i].pid,
|
|
|
512 ngx_processes[i].exiting,
|
|
|
513 ngx_processes[i].exited,
|
|
|
514 ngx_processes[i].detached,
|
|
|
515 ngx_processes[i].respawn,
|
|
|
516 ngx_processes[i].just_respawn);
|
|
|
517
|
|
|
518 if (ngx_processes[i].pid == -1) {
|
|
|
519 continue;
|
|
|
520 }
|
|
|
521
|
|
|
522 if (ngx_processes[i].exited) {
|
|
|
523
|
|
|
524 if (!ngx_processes[i].detached) {
|
|
|
525 ngx_close_channel(ngx_processes[i].channel, cycle->log);
|
|
|
526
|
|
|
527 ngx_processes[i].channel[0] = -1;
|
|
|
528 ngx_processes[i].channel[1] = -1;
|
|
|
529
|
|
|
530 ch.pid = ngx_processes[i].pid;
|
|
|
531 ch.slot = i;
|
|
|
532
|
|
|
533 for (n = 0; n < ngx_last_process; n++) {
|
|
|
534 if (ngx_processes[n].exited
|
|
|
535 || ngx_processes[n].pid == -1
|
|
|
536 || ngx_processes[n].channel[0] == -1)
|
|
|
537 {
|
|
|
538 continue;
|
|
|
539 }
|
|
|
540
|
|
|
541 ngx_log_debug3(NGX_LOG_DEBUG_CORE, cycle->log, 0,
|
|
10
|
542 "pass close channel s:%i pid:%P to:%P",
|
|
|
543 ch.slot, ch.pid, ngx_processes[n].pid);
|
|
0
|
544
|
|
|
545 /* TODO: NGX_AGAIN */
|
|
|
546
|
|
|
547 ngx_write_channel(ngx_processes[n].channel[0],
|
|
|
548 &ch, sizeof(ngx_channel_t), cycle->log);
|
|
|
549 }
|
|
|
550 }
|
|
|
551
|
|
|
552 if (ngx_processes[i].respawn
|
|
|
553 && !ngx_processes[i].exiting
|
|
|
554 && !ngx_terminate
|
|
|
555 && !ngx_quit)
|
|
|
556 {
|
|
|
557 if (ngx_spawn_process(cycle, ngx_processes[i].proc,
|
|
|
558 ngx_processes[i].data,
|
|
|
559 ngx_processes[i].name, i)
|
|
|
560 == NGX_ERROR)
|
|
|
561 {
|
|
|
562 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
|
|
|
563 "can not respawn %s", ngx_processes[i].name);
|
|
|
564 continue;
|
|
|
565 }
|
|
|
566
|
|
22
|
567
|
|
|
568 ch.command = NGX_CMD_OPEN_CHANNEL;
|
|
|
569 ch.pid = ngx_processes[ngx_process_slot].pid;
|
|
|
570 ch.slot = ngx_process_slot;
|
|
|
571 ch.fd = ngx_processes[ngx_process_slot].channel[0];
|
|
|
572
|
|
|
573 for (n = 0; n < ngx_last_process; n++) {
|
|
|
574
|
|
|
575 if (n == ngx_process_slot
|
|
|
576 || ngx_processes[n].pid == -1
|
|
|
577 || ngx_processes[n].channel[0] == -1)
|
|
|
578 {
|
|
|
579 continue;
|
|
|
580 }
|
|
|
581
|
|
|
582 ngx_log_debug6(NGX_LOG_DEBUG_CORE, cycle->log, 0,
|
|
|
583 "pass channel s:%d pid:%P fd:%d to s:%i pid:%P fd:%d",
|
|
|
584 ch.slot, ch.pid, ch.fd,
|
|
|
585 n, ngx_processes[n].pid,
|
|
|
586 ngx_processes[n].channel[0]);
|
|
|
587
|
|
|
588 /* TODO: NGX_AGAIN */
|
|
|
589
|
|
|
590 ngx_write_channel(ngx_processes[n].channel[0],
|
|
|
591 &ch, sizeof(ngx_channel_t), cycle->log);
|
|
|
592 }
|
|
|
593
|
|
0
|
594 live = 1;
|
|
|
595
|
|
|
596 continue;
|
|
|
597 }
|
|
|
598
|
|
|
599 if (ngx_processes[i].pid == ngx_new_binary) {
|
|
|
600 ngx_new_binary = 0;
|
|
|
601 if (ngx_noaccepting) {
|
|
|
602 ngx_restart = 1;
|
|
|
603 ngx_noaccepting = 0;
|
|
|
604 }
|
|
|
605 }
|
|
|
606
|
|
|
607 if (i == ngx_last_process - 1) {
|
|
|
608 ngx_last_process--;
|
|
|
609
|
|
|
610 } else {
|
|
|
611 ngx_processes[i].pid = -1;
|
|
|
612 }
|
|
|
613
|
|
|
614 } else if (ngx_processes[i].exiting || !ngx_processes[i].detached) {
|
|
|
615 live = 1;
|
|
|
616 }
|
|
|
617 }
|
|
|
618
|
|
|
619 return live;
|
|
|
620 }
|
|
|
621
|
|
|
622
|
|
2
|
623 static void ngx_master_exit(ngx_cycle_t *cycle)
|
|
0
|
624 {
|
|
|
625 ngx_delete_pidfile(cycle);
|
|
|
626
|
|
|
627 ngx_log_error(NGX_LOG_INFO, cycle->log, 0, "exit");
|
|
|
628
|
|
|
629 ngx_destroy_pool(cycle->pool);
|
|
|
630
|
|
|
631 exit(0);
|
|
|
632 }
|
|
|
633
|
|
|
634
|
|
|
635 static void ngx_worker_process_cycle(ngx_cycle_t *cycle, void *data)
|
|
|
636 {
|
|
18
|
637 ngx_int_t n;
|
|
|
638 ngx_err_t err;
|
|
|
639 ngx_core_conf_t *ccf;
|
|
|
640
|
|
22
|
641 ngx_worker_process_init(cycle, 1);
|
|
0
|
642
|
|
|
643 ngx_setproctitle("worker process");
|
|
|
644
|
|
|
645 #if (NGX_THREADS)
|
|
|
646
|
|
|
647 if (ngx_time_mutex_init(cycle->log) == NGX_ERROR) {
|
|
|
648 /* fatal */
|
|
|
649 exit(2);
|
|
|
650 }
|
|
|
651
|
|
18
|
652 ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx, ngx_core_module);
|
|
|
653
|
|
0
|
654 if (ngx_threads_n) {
|
|
|
655 if (ngx_init_threads(ngx_threads_n,
|
|
|
656 ccf->thread_stack_size, cycle) == NGX_ERROR)
|
|
|
657 {
|
|
|
658 /* fatal */
|
|
|
659 exit(2);
|
|
|
660 }
|
|
|
661
|
|
|
662 err = ngx_thread_key_create(&ngx_core_tls_key);
|
|
|
663 if (err != 0) {
|
|
|
664 ngx_log_error(NGX_LOG_ALERT, cycle->log, err,
|
|
|
665 ngx_thread_key_create_n " failed");
|
|
|
666 /* fatal */
|
|
|
667 exit(2);
|
|
|
668 }
|
|
|
669
|
|
|
670 for (n = 0; n < ngx_threads_n; n++) {
|
|
|
671
|
|
|
672 if (!(ngx_threads[n].cv = ngx_cond_init(cycle->log))) {
|
|
|
673 /* fatal */
|
|
|
674 exit(2);
|
|
|
675 }
|
|
|
676
|
|
|
677 if (ngx_create_thread((ngx_tid_t *) &ngx_threads[n].tid,
|
|
|
678 ngx_worker_thread_cycle,
|
|
|
679 (void *) &ngx_threads[n], cycle->log) != 0)
|
|
|
680 {
|
|
|
681 /* fatal */
|
|
|
682 exit(2);
|
|
|
683 }
|
|
|
684 }
|
|
|
685 }
|
|
|
686
|
|
|
687 #endif
|
|
|
688
|
|
|
689 for ( ;; ) {
|
|
|
690 if (ngx_exiting
|
|
|
691 && ngx_event_timer_rbtree == &ngx_event_timer_sentinel)
|
|
|
692 {
|
|
|
693 ngx_log_error(NGX_LOG_INFO, cycle->log, 0, "exiting");
|
|
|
694
|
|
|
695
|
|
|
696 #if (NGX_THREADS)
|
|
|
697 ngx_terminate = 1;
|
|
|
698
|
|
|
699 ngx_wakeup_worker_threads(cycle);
|
|
|
700 #endif
|
|
|
701
|
|
|
702 /*
|
|
|
703 * we do not destroy cycle->pool here because a signal handler
|
|
|
704 * that uses cycle->log can be called at this point
|
|
|
705 */
|
|
|
706 exit(0);
|
|
|
707 }
|
|
|
708
|
|
|
709 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, cycle->log, 0, "worker cycle");
|
|
|
710
|
|
|
711 ngx_process_events(cycle);
|
|
|
712
|
|
|
713 if (ngx_terminate) {
|
|
|
714 ngx_log_error(NGX_LOG_INFO, cycle->log, 0, "exiting");
|
|
|
715
|
|
|
716 #if (NGX_THREADS)
|
|
|
717 ngx_wakeup_worker_threads(cycle);
|
|
|
718 #endif
|
|
|
719
|
|
|
720 /*
|
|
|
721 * we do not destroy cycle->pool here because a signal handler
|
|
|
722 * that uses cycle->log can be called at this point
|
|
|
723 */
|
|
|
724 exit(0);
|
|
|
725 }
|
|
|
726
|
|
|
727 if (ngx_quit) {
|
|
|
728 ngx_quit = 0;
|
|
|
729 ngx_log_error(NGX_LOG_INFO, cycle->log, 0,
|
|
|
730 "gracefully shutting down");
|
|
|
731 ngx_setproctitle("worker process is shutting down");
|
|
|
732
|
|
|
733 if (!ngx_exiting) {
|
|
|
734 ngx_close_listening_sockets(cycle);
|
|
|
735 ngx_exiting = 1;
|
|
|
736 }
|
|
|
737 }
|
|
|
738
|
|
|
739 if (ngx_reopen) {
|
|
|
740 ngx_reopen = 0;
|
|
|
741 ngx_log_error(NGX_LOG_INFO, cycle->log, 0, "reopen logs");
|
|
|
742 ngx_reopen_files(cycle, -1);
|
|
|
743 }
|
|
|
744 }
|
|
|
745 }
|
|
|
746
|
|
|
747
|
|
22
|
748 static void ngx_worker_process_init(ngx_cycle_t *cycle, ngx_uint_t priority)
|
|
16
|
749 {
|
|
|
750 sigset_t set;
|
|
|
751 ngx_int_t n;
|
|
|
752 ngx_uint_t i;
|
|
|
753 struct timeval tv;
|
|
|
754 ngx_core_conf_t *ccf;
|
|
|
755 ngx_listening_t *ls;
|
|
|
756
|
|
|
757 ngx_gettimeofday(&tv);
|
|
|
758
|
|
|
759 ngx_start_msec = (ngx_epoch_msec_t) tv.tv_sec * 1000 + tv.tv_usec / 1000;
|
|
|
760 ngx_old_elapsed_msec = 0;
|
|
|
761 ngx_elapsed_msec = 0;
|
|
|
762
|
|
|
763
|
|
|
764 ngx_process = NGX_PROCESS_WORKER;
|
|
|
765
|
|
|
766 ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx, ngx_core_module);
|
|
|
767
|
|
|
768 if (geteuid() == 0) {
|
|
22
|
769 if (priority && ccf->priority != 0) {
|
|
|
770 if (setpriority(PRIO_PROCESS, 0, ccf->priority) == -1) {
|
|
|
771 ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
|
|
|
772 "setpriority(%d) failed", ccf->priority);
|
|
|
773 }
|
|
|
774 }
|
|
|
775
|
|
16
|
776 if (setgid(ccf->group) == -1) {
|
|
|
777 ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
|
|
|
778 "setgid(%d) failed", ccf->group);
|
|
|
779 /* fatal */
|
|
|
780 exit(2);
|
|
|
781 }
|
|
|
782
|
|
22
|
783 if (initgroups(ccf->username, ccf->group) == -1) {
|
|
|
784 ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
|
|
|
785 "initgroups(%s, %d) failed",
|
|
|
786 ccf->username, ccf->group);
|
|
|
787 }
|
|
|
788
|
|
16
|
789 if (setuid(ccf->user) == -1) {
|
|
|
790 ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
|
|
|
791 "setuid(%d) failed", ccf->user);
|
|
|
792 /* fatal */
|
|
|
793 exit(2);
|
|
|
794 }
|
|
|
795 }
|
|
|
796
|
|
|
797 #if (NGX_HAVE_PR_SET_DUMPABLE)
|
|
|
798
|
|
|
799 /* allow coredump after setuid() in Linux 2.4.x */
|
|
|
800
|
|
|
801 if (prctl(PR_SET_DUMPABLE, 1, 0, 0, 0) == -1) {
|
|
|
802 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
|
|
|
803 "prctl(PR_SET_DUMPABLE) failed");
|
|
|
804 }
|
|
|
805
|
|
|
806 #endif
|
|
|
807
|
|
|
808 sigemptyset(&set);
|
|
|
809
|
|
|
810 if (sigprocmask(SIG_SETMASK, &set, NULL) == -1) {
|
|
|
811 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
|
|
|
812 "sigprocmask() failed");
|
|
|
813 }
|
|
|
814
|
|
|
815 ngx_init_temp_number();
|
|
|
816
|
|
|
817 /*
|
|
|
818 * disable deleting previous events for the listening sockets because
|
|
|
819 * in the worker processes there are no events at all at this point
|
|
|
820 */
|
|
|
821 ls = cycle->listening.elts;
|
|
|
822 for (i = 0; i < cycle->listening.nelts; i++) {
|
|
|
823 ls[i].remain = 0;
|
|
|
824 }
|
|
|
825
|
|
|
826 for (i = 0; ngx_modules[i]; i++) {
|
|
|
827 if (ngx_modules[i]->init_process) {
|
|
|
828 if (ngx_modules[i]->init_process(cycle) == NGX_ERROR) {
|
|
|
829 /* fatal */
|
|
|
830 exit(2);
|
|
|
831 }
|
|
|
832 }
|
|
|
833 }
|
|
|
834
|
|
|
835 for (n = 0; n < ngx_last_process; n++) {
|
|
|
836
|
|
|
837 if (ngx_processes[n].pid == -1) {
|
|
|
838 continue;
|
|
|
839 }
|
|
|
840
|
|
|
841 if (n == ngx_process_slot) {
|
|
|
842 continue;
|
|
|
843 }
|
|
|
844
|
|
|
845 if (ngx_processes[n].channel[1] == -1) {
|
|
|
846 continue;
|
|
|
847 }
|
|
|
848
|
|
|
849 if (close(ngx_processes[n].channel[1]) == -1) {
|
|
|
850 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
|
|
|
851 "close() channel failed");
|
|
|
852 }
|
|
|
853 }
|
|
|
854
|
|
|
855 if (close(ngx_processes[ngx_process_slot].channel[0]) == -1) {
|
|
|
856 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
|
|
|
857 "close() channel failed");
|
|
|
858 }
|
|
|
859
|
|
|
860 #if 0
|
|
|
861 ngx_last_process = 0;
|
|
|
862 #endif
|
|
|
863
|
|
|
864 if (ngx_add_channel_event(cycle, ngx_channel, NGX_READ_EVENT,
|
|
|
865 ngx_channel_handler) == NGX_ERROR)
|
|
|
866 {
|
|
|
867 /* fatal */
|
|
|
868 exit(2);
|
|
|
869 }
|
|
|
870 }
|
|
|
871
|
|
|
872
|
|
0
|
873 static void ngx_channel_handler(ngx_event_t *ev)
|
|
|
874 {
|
|
|
875 ngx_int_t n;
|
|
|
876 ngx_channel_t ch;
|
|
|
877 ngx_connection_t *c;
|
|
|
878
|
|
16
|
879 if (ev->timedout) {
|
|
|
880 ev->timedout = 0;
|
|
|
881 return;
|
|
|
882 }
|
|
|
883
|
|
0
|
884 c = ev->data;
|
|
|
885
|
|
|
886 ngx_log_debug0(NGX_LOG_DEBUG_CORE, ev->log, 0, "channel handler");
|
|
|
887
|
|
|
888 n = ngx_read_channel(c->fd, &ch, sizeof(ngx_channel_t), ev->log);
|
|
|
889
|
|
10
|
890 ngx_log_debug1(NGX_LOG_DEBUG_CORE, ev->log, 0, "channel: %i", n);
|
|
0
|
891
|
|
10
|
892 if (n == NGX_ERROR) {
|
|
|
893 if (close(c->fd) == -1) {
|
|
|
894 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno,
|
|
|
895 "close() channel failed");
|
|
|
896 }
|
|
|
897
|
|
|
898 c->fd = -1;
|
|
|
899 return;
|
|
|
900 }
|
|
|
901
|
|
|
902 if (n == NGX_AGAIN) {
|
|
0
|
903 return;
|
|
|
904 }
|
|
|
905
|
|
|
906 ngx_log_debug1(NGX_LOG_DEBUG_CORE, ev->log, 0,
|
|
|
907 "channel command: %d", ch.command);
|
|
|
908
|
|
|
909 switch (ch.command) {
|
|
|
910
|
|
|
911 case NGX_CMD_QUIT:
|
|
|
912 ngx_quit = 1;
|
|
|
913 break;
|
|
|
914
|
|
|
915 case NGX_CMD_TERMINATE:
|
|
|
916 ngx_terminate = 1;
|
|
|
917 break;
|
|
|
918
|
|
|
919 case NGX_CMD_REOPEN:
|
|
|
920 ngx_reopen = 1;
|
|
|
921 break;
|
|
|
922
|
|
|
923 case NGX_CMD_OPEN_CHANNEL:
|
|
|
924
|
|
|
925 ngx_log_debug3(NGX_LOG_DEBUG_CORE, ev->log, 0,
|
|
10
|
926 "get channel s:%i pid:%P fd:%d", ch.slot, ch.pid, ch.fd);
|
|
0
|
927
|
|
|
928 ngx_processes[ch.slot].pid = ch.pid;
|
|
|
929 ngx_processes[ch.slot].channel[0] = ch.fd;
|
|
|
930 break;
|
|
|
931
|
|
|
932 case NGX_CMD_CLOSE_CHANNEL:
|
|
|
933
|
|
|
934 ngx_log_debug4(NGX_LOG_DEBUG_CORE, ev->log, 0,
|
|
10
|
935 "close channel s:%i pid:%P our:%P fd:%d",
|
|
0
|
936 ch.slot, ch.pid, ngx_processes[ch.slot].pid,
|
|
|
937 ngx_processes[ch.slot].channel[0]);
|
|
|
938
|
|
|
939 if (close(ngx_processes[ch.slot].channel[0]) == -1) {
|
|
16
|
940 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno,
|
|
|
941 "close() channel failed");
|
|
0
|
942 }
|
|
|
943
|
|
|
944 ngx_processes[ch.slot].channel[0] = -1;
|
|
|
945 break;
|
|
|
946 }
|
|
|
947 }
|
|
|
948
|
|
|
949
|
|
|
950 #if (NGX_THREADS)
|
|
|
951
|
|
|
952 static void ngx_wakeup_worker_threads(ngx_cycle_t *cycle)
|
|
|
953 {
|
|
|
954 ngx_int_t i;
|
|
|
955 ngx_uint_t live;
|
|
|
956
|
|
|
957 for ( ;; ) {
|
|
|
958
|
|
|
959 live = 0;
|
|
|
960
|
|
|
961 for (i = 0; i < ngx_threads_n; i++) {
|
|
|
962 if (ngx_threads[i].state < NGX_THREAD_EXIT) {
|
|
18
|
963 if (ngx_cond_signal(ngx_threads[i].cv) == NGX_ERROR) {
|
|
|
964 ngx_threads[i].state = NGX_THREAD_DONE;
|
|
0
|
965
|
|
|
966 } else {
|
|
|
967 live = 1;
|
|
|
968 }
|
|
|
969 }
|
|
|
970
|
|
|
971 if (ngx_threads[i].state == NGX_THREAD_EXIT) {
|
|
|
972 ngx_thread_join(ngx_threads[i].tid, NULL);
|
|
|
973 ngx_threads[i].state = NGX_THREAD_DONE;
|
|
|
974 }
|
|
|
975 }
|
|
|
976
|
|
|
977 if (live == 0) {
|
|
|
978 ngx_log_debug0(NGX_LOG_DEBUG_CORE, cycle->log, 0,
|
|
|
979 "all worker threads are joined");
|
|
|
980
|
|
|
981 /* STUB */
|
|
|
982 ngx_done_events(cycle);
|
|
|
983 ngx_mutex_destroy(ngx_event_timer_mutex);
|
|
|
984 ngx_mutex_destroy(ngx_posted_events_mutex);
|
|
|
985
|
|
|
986 return;
|
|
|
987 }
|
|
|
988
|
|
|
989 ngx_sched_yield();
|
|
|
990 }
|
|
|
991 }
|
|
|
992
|
|
|
993
|
|
10
|
994 static void *ngx_worker_thread_cycle(void *data)
|
|
0
|
995 {
|
|
|
996 ngx_thread_t *thr = data;
|
|
|
997
|
|
|
998 sigset_t set;
|
|
|
999 ngx_err_t err;
|
|
|
1000 ngx_core_tls_t *tls;
|
|
|
1001 ngx_cycle_t *cycle;
|
|
|
1002
|
|
|
1003 cycle = (ngx_cycle_t *) ngx_cycle;
|
|
|
1004
|
|
|
1005 sigemptyset(&set);
|
|
|
1006 sigaddset(&set, ngx_signal_value(NGX_RECONFIGURE_SIGNAL));
|
|
|
1007 sigaddset(&set, ngx_signal_value(NGX_REOPEN_SIGNAL));
|
|
|
1008 sigaddset(&set, ngx_signal_value(NGX_CHANGEBIN_SIGNAL));
|
|
|
1009
|
|
|
1010 err = ngx_thread_sigmask(SIG_BLOCK, &set, NULL);
|
|
|
1011 if (err) {
|
|
|
1012 ngx_log_error(NGX_LOG_ALERT, cycle->log, err,
|
|
|
1013 ngx_thread_sigmask_n " failed");
|
|
|
1014 return (void *) 1;
|
|
|
1015 }
|
|
|
1016
|
|
|
1017 ngx_log_debug1(NGX_LOG_DEBUG_CORE, cycle->log, 0,
|
|
10
|
1018 "thread " NGX_TID_T_FMT " started", ngx_thread_self());
|
|
0
|
1019
|
|
|
1020 ngx_setthrtitle("worker thread");
|
|
|
1021
|
|
|
1022 if (!(tls = ngx_calloc(sizeof(ngx_core_tls_t), cycle->log))) {
|
|
|
1023 return (void *) 1;
|
|
|
1024 }
|
|
|
1025
|
|
|
1026 err = ngx_thread_set_tls(ngx_core_tls_key, tls);
|
|
|
1027 if (err != 0) {
|
|
|
1028 ngx_log_error(NGX_LOG_ALERT, cycle->log, err,
|
|
|
1029 ngx_thread_set_tls_n " failed");
|
|
|
1030 return (void *) 1;
|
|
|
1031 }
|
|
|
1032
|
|
|
1033 if (ngx_mutex_lock(ngx_posted_events_mutex) == NGX_ERROR) {
|
|
|
1034 return (void *) 1;
|
|
|
1035 }
|
|
|
1036
|
|
|
1037 for ( ;; ) {
|
|
|
1038 thr->state = NGX_THREAD_FREE;
|
|
|
1039
|
|
|
1040 if (ngx_cond_wait(thr->cv, ngx_posted_events_mutex) == NGX_ERROR) {
|
|
|
1041 return (void *) 1;
|
|
|
1042 }
|
|
|
1043
|
|
|
1044 if (ngx_terminate) {
|
|
|
1045 thr->state = NGX_THREAD_EXIT;
|
|
|
1046
|
|
|
1047 ngx_mutex_unlock(ngx_posted_events_mutex);
|
|
|
1048
|
|
|
1049 ngx_log_debug1(NGX_LOG_DEBUG_CORE, cycle->log, 0,
|
|
10
|
1050 "thread " NGX_TID_T_FMT " is done",
|
|
|
1051 ngx_thread_self());
|
|
0
|
1052
|
|
|
1053 return (void *) 0;
|
|
|
1054 }
|
|
|
1055
|
|
|
1056 thr->state = NGX_THREAD_BUSY;
|
|
|
1057
|
|
|
1058 if (ngx_event_thread_process_posted(cycle) == NGX_ERROR) {
|
|
|
1059 return (void *) 1;
|
|
|
1060 }
|
|
|
1061
|
|
|
1062 if (ngx_event_thread_process_posted(cycle) == NGX_ERROR) {
|
|
|
1063 return (void *) 1;
|
|
|
1064 }
|
|
|
1065
|
|
|
1066 if (ngx_process_changes) {
|
|
|
1067 if (ngx_process_changes(cycle, 1) == NGX_ERROR) {
|
|
|
1068 return (void *) 1;
|
|
|
1069 }
|
|
|
1070 }
|
|
|
1071 }
|
|
|
1072 }
|
|
|
1073
|
|
|
1074 #endif
|
|
16
|
1075
|
|
|
1076
|
|
|
1077 static void ngx_garbage_collector_cycle(ngx_cycle_t *cycle, void *data)
|
|
|
1078 {
|
|
|
1079 ngx_uint_t i;
|
|
|
1080 ngx_gc_t ctx;
|
|
|
1081 ngx_path_t **path;
|
|
|
1082 ngx_event_t *ev;
|
|
|
1083
|
|
22
|
1084 ngx_worker_process_init(cycle, 0);
|
|
16
|
1085
|
|
|
1086 ev = &cycle->read_events[ngx_channel];
|
|
|
1087
|
|
|
1088 ngx_accept_mutex = NULL;
|
|
|
1089
|
|
|
1090 ngx_setproctitle("garbage collector");
|
|
|
1091
|
|
|
1092 #if 0
|
|
|
1093 ngx_add_timer(ev, 60 * 1000);
|
|
|
1094 #endif
|
|
|
1095
|
|
|
1096 for ( ;; ) {
|
|
|
1097
|
|
|
1098 if (ngx_terminate || ngx_quit) {
|
|
|
1099 ngx_log_error(NGX_LOG_INFO, cycle->log, 0, "exiting");
|
|
|
1100 exit(0);
|
|
|
1101 }
|
|
|
1102
|
|
|
1103 if (ngx_reopen) {
|
|
|
1104 ngx_reopen = 0;
|
|
|
1105 ngx_log_error(NGX_LOG_INFO, cycle->log, 0, "reopen logs");
|
|
|
1106 ngx_reopen_files(cycle, -1);
|
|
|
1107 }
|
|
|
1108
|
|
|
1109 path = cycle->pathes.elts;
|
|
|
1110 for (i = 0; i < cycle->pathes.nelts; i++) {
|
|
|
1111 ctx.path = path[i];
|
|
|
1112 ctx.log = cycle->log;
|
|
|
1113 ctx.handler = path[i]->gc_handler;
|
|
|
1114
|
|
|
1115 ngx_collect_garbage(&ctx, &path[i]->name, 0);
|
|
|
1116 }
|
|
|
1117
|
|
|
1118 ngx_add_timer(ev, 60 * 60 * 1000);
|
|
|
1119
|
|
|
1120 ngx_process_events(cycle);
|
|
|
1121 }
|
|
|
1122 }
|
