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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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26
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38 sig_atomic_t ngx_debug_quit;
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0
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39 ngx_uint_t ngx_exiting;
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40 sig_atomic_t ngx_reconfigure;
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41 sig_atomic_t ngx_reopen;
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42
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43 sig_atomic_t ngx_change_binary;
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44 ngx_pid_t ngx_new_binary;
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45 ngx_uint_t ngx_inherited;
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46 ngx_uint_t ngx_daemonized;
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47
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48 sig_atomic_t ngx_noaccept;
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49 ngx_uint_t ngx_noaccepting;
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50 ngx_uint_t ngx_restart;
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51
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52
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53 #if (NGX_THREADS)
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54 volatile ngx_thread_t ngx_threads[NGX_MAX_THREADS];
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55 ngx_int_t ngx_threads_n;
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56 #endif
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57
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58
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59 u_char master_process[] = "master process";
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60
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61
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2
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62 void ngx_master_process_cycle(ngx_cycle_t *cycle)
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0
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63 {
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64 char *title;
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65 u_char *p;
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66 size_t size;
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67 ngx_int_t i;
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68 sigset_t set;
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69 struct timeval tv;
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70 struct itimerval itv;
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71 ngx_uint_t live;
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72 ngx_msec_t delay;
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73 ngx_core_conf_t *ccf;
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74
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75 sigemptyset(&set);
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76 sigaddset(&set, SIGCHLD);
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77 sigaddset(&set, SIGALRM);
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78 sigaddset(&set, SIGIO);
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79 sigaddset(&set, SIGINT);
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80 sigaddset(&set, ngx_signal_value(NGX_RECONFIGURE_SIGNAL));
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81 sigaddset(&set, ngx_signal_value(NGX_REOPEN_SIGNAL));
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82 sigaddset(&set, ngx_signal_value(NGX_NOACCEPT_SIGNAL));
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83 sigaddset(&set, ngx_signal_value(NGX_TERMINATE_SIGNAL));
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84 sigaddset(&set, ngx_signal_value(NGX_SHUTDOWN_SIGNAL));
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85 sigaddset(&set, ngx_signal_value(NGX_CHANGEBIN_SIGNAL));
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86
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87 if (sigprocmask(SIG_BLOCK, &set, NULL) == -1) {
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88 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
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89 "sigprocmask() failed");
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90 }
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91
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92 sigemptyset(&set);
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93
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94
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95 size = sizeof(master_process);
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96
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2
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97 for (i = 0; i < ngx_argc; i++) {
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98 size += ngx_strlen(ngx_argv[i]) + 1;
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0
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99 }
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100
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101 title = ngx_palloc(cycle->pool, size);
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102
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103 p = ngx_cpymem(title, master_process, sizeof(master_process) - 1);
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2
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104 for (i = 0; i < ngx_argc; i++) {
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0
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105 *p++ = ' ';
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2
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106 p = ngx_cpystrn(p, (u_char *) ngx_argv[i], size);
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0
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107 }
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108
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109 ngx_setproctitle(title);
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110
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111
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112 ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx, ngx_core_module);
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113
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114 ngx_start_worker_processes(cycle, ccf->worker_processes,
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115 NGX_PROCESS_RESPAWN);
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16
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116 ngx_start_garbage_collector(cycle, NGX_PROCESS_RESPAWN);
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0
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117
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118 ngx_new_binary = 0;
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119 delay = 0;
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120 live = 1;
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121
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122 for ( ;; ) {
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123 if (delay) {
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124 delay *= 2;
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125
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126 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
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127 "temination cycle: %d", delay);
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128
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129 itv.it_interval.tv_sec = 0;
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130 itv.it_interval.tv_usec = 0;
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131 itv.it_value.tv_sec = delay / 1000;
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132 itv.it_value.tv_usec = (delay % 1000 ) * 1000;
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133
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134 if (setitimer(ITIMER_REAL, &itv, NULL) == -1) {
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135 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
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136 "setitimer() failed");
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137 }
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138 }
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139
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140 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, cycle->log, 0, "sigsuspend");
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141
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142 sigsuspend(&set);
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143
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144 ngx_gettimeofday(&tv);
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145 ngx_time_update(tv.tv_sec);
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146
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147 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, cycle->log, 0, "wake up");
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148
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149 if (ngx_reap) {
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150 ngx_reap = 0;
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151 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, cycle->log, 0, "reap childs");
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152
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153 live = ngx_reap_childs(cycle);
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154 }
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155
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156 if (!live && (ngx_terminate || ngx_quit)) {
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2
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157 ngx_master_exit(cycle);
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0
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158 }
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159
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160 if (ngx_terminate) {
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161 if (delay == 0) {
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162 delay = 50;
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163 }
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164
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165 if (delay > 1000) {
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166 ngx_signal_worker_processes(cycle, SIGKILL);
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167 } else {
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168 ngx_signal_worker_processes(cycle,
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169 ngx_signal_value(NGX_TERMINATE_SIGNAL));
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170 }
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171
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172 continue;
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173 }
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174
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175 if (ngx_quit) {
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176 ngx_signal_worker_processes(cycle,
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177 ngx_signal_value(NGX_SHUTDOWN_SIGNAL));
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178 continue;
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179 }
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180
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181 if (ngx_timer) {
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182 ngx_timer = 0;
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4
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183
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184 if (!ngx_noaccepting) {
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185 ngx_start_worker_processes(cycle, ccf->worker_processes,
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186 NGX_PROCESS_JUST_RESPAWN);
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16
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187 ngx_start_garbage_collector(cycle, NGX_PROCESS_JUST_RESPAWN);
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4
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188 live = 1;
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189 ngx_signal_worker_processes(cycle,
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0
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190 ngx_signal_value(NGX_SHUTDOWN_SIGNAL));
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4
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191 }
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0
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192 }
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193
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194 if (ngx_reconfigure) {
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195 ngx_reconfigure = 0;
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196
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197 if (ngx_new_binary) {
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198 ngx_start_worker_processes(cycle, ccf->worker_processes,
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199 NGX_PROCESS_RESPAWN);
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16
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200 ngx_start_garbage_collector(cycle, NGX_PROCESS_RESPAWN);
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0
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201 ngx_noaccepting = 0;
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202
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203 continue;
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204 }
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205
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26
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206 ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "reconfiguring");
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0
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207
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208 cycle = ngx_init_cycle(cycle);
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209 if (cycle == NULL) {
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210 cycle = (ngx_cycle_t *) ngx_cycle;
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211 continue;
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212 }
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213
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214 ngx_cycle = cycle;
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215 ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx,
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216 ngx_core_module);
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217 ngx_start_worker_processes(cycle, ccf->worker_processes,
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218 NGX_PROCESS_JUST_RESPAWN);
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16
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219 ngx_start_garbage_collector(cycle, NGX_PROCESS_JUST_RESPAWN);
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0
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220 live = 1;
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221 ngx_signal_worker_processes(cycle,
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222 ngx_signal_value(NGX_SHUTDOWN_SIGNAL));
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223 }
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224
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225 if (ngx_restart) {
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226 ngx_restart = 0;
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227 ngx_start_worker_processes(cycle, ccf->worker_processes,
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228 NGX_PROCESS_RESPAWN);
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16
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229 ngx_start_garbage_collector(cycle, NGX_PROCESS_RESPAWN);
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0
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230 live = 1;
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231 }
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232
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233 if (ngx_reopen) {
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234 ngx_reopen = 0;
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26
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235 ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "reopening logs");
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0
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236 ngx_reopen_files(cycle, ccf->user);
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237 ngx_signal_worker_processes(cycle,
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238 ngx_signal_value(NGX_REOPEN_SIGNAL));
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239 }
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240
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241 if (ngx_change_binary) {
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242 ngx_change_binary = 0;
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26
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243 ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "changing binary");
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2
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244 ngx_new_binary = ngx_exec_new_binary(cycle, ngx_argv);
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0
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245 }
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246
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247 if (ngx_noaccept) {
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248 ngx_noaccept = 0;
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249 ngx_noaccepting = 1;
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250 ngx_signal_worker_processes(cycle,
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251 ngx_signal_value(NGX_SHUTDOWN_SIGNAL));
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252 }
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253 }
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254 }
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255
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256
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2
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257 void ngx_single_process_cycle(ngx_cycle_t *cycle)
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0
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258 {
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259 ngx_uint_t i;
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260
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261 ngx_init_temp_number();
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262
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263 for (i = 0; ngx_modules[i]; i++) {
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264 if (ngx_modules[i]->init_process) {
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265 if (ngx_modules[i]->init_process(cycle) == NGX_ERROR) {
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266 /* fatal */
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267 exit(2);
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268 }
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269 }
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270 }
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271
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272 for ( ;; ) {
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273 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, cycle->log, 0, "worker cycle");
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274
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275 ngx_process_events(cycle);
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276
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277 if (ngx_terminate || ngx_quit) {
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2
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278 ngx_master_exit(cycle);
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0
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279 }
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280
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281 if (ngx_reconfigure) {
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282 ngx_reconfigure = 0;
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26
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283 ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "reconfiguring");
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0
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284
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285 cycle = ngx_init_cycle(cycle);
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286 if (cycle == NULL) {
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287 cycle = (ngx_cycle_t *) ngx_cycle;
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288 continue;
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289 }
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290
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291 ngx_cycle = cycle;
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292 }
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293
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294 if (ngx_reopen) {
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295 ngx_reopen = 0;
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26
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296 ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "reopening logs");
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0
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297 ngx_reopen_files(cycle, (ngx_uid_t) -1);
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298 }
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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 static void ngx_start_worker_processes(ngx_cycle_t *cycle, ngx_int_t n,
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304 ngx_int_t type)
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305 {
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306 ngx_int_t i;
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307 ngx_channel_t ch;
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308 struct itimerval itv;
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309
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26
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310 ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "start worker processes");
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0
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311
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312 ch.command = NGX_CMD_OPEN_CHANNEL;
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313
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314 while (n--) {
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315 ngx_spawn_process(cycle, ngx_worker_process_cycle, NULL,
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316 "worker process", type);
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317
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318 ch.pid = ngx_processes[ngx_process_slot].pid;
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319 ch.slot = ngx_process_slot;
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320 ch.fd = ngx_processes[ngx_process_slot].channel[0];
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321
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322 for (i = 0; i < ngx_last_process; i++) {
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323
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324 if (i == ngx_process_slot
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325 || ngx_processes[i].pid == -1
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326 || ngx_processes[i].channel[0] == -1)
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327 {
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328 continue;
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329 }
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330
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331 ngx_log_debug6(NGX_LOG_DEBUG_CORE, cycle->log, 0,
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10
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332 "pass channel s:%d pid:%P fd:%d to s:%i pid:%P fd:%d",
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333 ch.slot, ch.pid, ch.fd,
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334 i, ngx_processes[i].pid,
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335 ngx_processes[i].channel[0]);
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0
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336
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337 /* TODO: NGX_AGAIN */
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338
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339 ngx_write_channel(ngx_processes[i].channel[0],
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340 &ch, sizeof(ngx_channel_t), cycle->log);
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341 }
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342 }
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343
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344 /*
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345 * we have to limit the maximum life time of the worker processes
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346 * by 10 days because our millisecond event timer is limited
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347 * by 24 days on 32-bit platforms
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348 */
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349
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350 itv.it_interval.tv_sec = 0;
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351 itv.it_interval.tv_usec = 0;
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352 itv.it_value.tv_sec = 10 * 24 * 60 * 60;
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353 itv.it_value.tv_usec = 0;
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354
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355 if (setitimer(ITIMER_REAL, &itv, NULL) == -1) {
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356 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
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357 "setitimer() failed");
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358 }
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359 }
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360
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361
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16
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362 static void ngx_start_garbage_collector(ngx_cycle_t *cycle, ngx_int_t type)
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363 {
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364 ngx_int_t i;
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365 ngx_channel_t ch;
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366
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367 return;
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368
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26
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369 ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "start garbage collector");
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16
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370
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371 ch.command = NGX_CMD_OPEN_CHANNEL;
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372
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373 ngx_spawn_process(cycle, ngx_garbage_collector_cycle, NULL,
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374 "garbage collector", type);
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375
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376 ch.pid = ngx_processes[ngx_process_slot].pid;
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377 ch.slot = ngx_process_slot;
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378 ch.fd = ngx_processes[ngx_process_slot].channel[0];
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379
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380 for (i = 0; i < ngx_last_process; i++) {
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381
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382 if (i == ngx_process_slot
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383 || ngx_processes[i].pid == -1
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384 || ngx_processes[i].channel[0] == -1)
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|
|
385 {
|
|
|
386 continue;
|
|
|
387 }
|
|
|
388
|
|
|
389 ngx_log_debug6(NGX_LOG_DEBUG_CORE, cycle->log, 0,
|
|
|
390 "pass channel s:%d pid:%P fd:%d to s:%i pid:%P fd:%d",
|
|
|
391 ch.slot, ch.pid, ch.fd,
|
|
|
392 i, ngx_processes[i].pid,
|
|
|
393 ngx_processes[i].channel[0]);
|
|
|
394
|
|
|
395 /* TODO: NGX_AGAIN */
|
|
|
396
|
|
|
397 ngx_write_channel(ngx_processes[i].channel[0],
|
|
|
398 &ch, sizeof(ngx_channel_t), cycle->log);
|
|
|
399 }
|
|
|
400 }
|
|
|
401
|
|
|
402
|
|
0
|
403 static void ngx_signal_worker_processes(ngx_cycle_t *cycle, int signo)
|
|
|
404 {
|
|
|
405 ngx_int_t i;
|
|
|
406 ngx_err_t err;
|
|
|
407 ngx_channel_t ch;
|
|
|
408
|
|
|
409
|
|
|
410 switch (signo) {
|
|
|
411
|
|
|
412 case ngx_signal_value(NGX_SHUTDOWN_SIGNAL):
|
|
|
413 ch.command = NGX_CMD_QUIT;
|
|
|
414 break;
|
|
|
415
|
|
|
416 case ngx_signal_value(NGX_TERMINATE_SIGNAL):
|
|
|
417 ch.command = NGX_CMD_TERMINATE;
|
|
|
418 break;
|
|
|
419
|
|
|
420 case ngx_signal_value(NGX_REOPEN_SIGNAL):
|
|
|
421 ch.command = NGX_CMD_REOPEN;
|
|
|
422 break;
|
|
|
423
|
|
|
424 default:
|
|
|
425 ch.command = 0;
|
|
|
426 }
|
|
|
427
|
|
|
428 ch.fd = -1;
|
|
|
429
|
|
|
430
|
|
|
431 for (i = 0; i < ngx_last_process; i++) {
|
|
|
432
|
|
|
433 ngx_log_debug7(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
|
|
10
|
434 "child: %d %P e:%d t:%d d:%d r:%d j:%d",
|
|
0
|
435 i,
|
|
|
436 ngx_processes[i].pid,
|
|
|
437 ngx_processes[i].exiting,
|
|
|
438 ngx_processes[i].exited,
|
|
|
439 ngx_processes[i].detached,
|
|
|
440 ngx_processes[i].respawn,
|
|
|
441 ngx_processes[i].just_respawn);
|
|
|
442
|
|
|
443 if (ngx_processes[i].detached || ngx_processes[i].pid == -1) {
|
|
|
444 continue;
|
|
|
445 }
|
|
|
446
|
|
|
447 if (ngx_processes[i].just_respawn) {
|
|
|
448 ngx_processes[i].just_respawn = 0;
|
|
|
449 continue;
|
|
|
450 }
|
|
|
451
|
|
|
452 if (ngx_processes[i].exiting
|
|
|
453 && signo == ngx_signal_value(NGX_SHUTDOWN_SIGNAL))
|
|
|
454 {
|
|
|
455 continue;
|
|
|
456 }
|
|
|
457
|
|
|
458 if (ch.command) {
|
|
|
459 if (ngx_write_channel(ngx_processes[i].channel[0],
|
|
|
460 &ch, sizeof(ngx_channel_t), cycle->log) == NGX_OK)
|
|
|
461 {
|
|
|
462 if (signo != ngx_signal_value(NGX_REOPEN_SIGNAL)) {
|
|
|
463 ngx_processes[i].exiting = 1;
|
|
|
464 }
|
|
|
465
|
|
|
466 continue;
|
|
|
467 }
|
|
|
468 }
|
|
|
469
|
|
|
470 ngx_log_debug2(NGX_LOG_DEBUG_CORE, cycle->log, 0,
|
|
10
|
471 "kill (%P, %d)" , ngx_processes[i].pid, signo);
|
|
0
|
472
|
|
|
473 if (kill(ngx_processes[i].pid, signo) == -1) {
|
|
|
474 err = ngx_errno;
|
|
|
475 ngx_log_error(NGX_LOG_ALERT, cycle->log, err,
|
|
10
|
476 "kill(%P, %d) failed",
|
|
0
|
477 ngx_processes[i].pid, signo);
|
|
|
478
|
|
|
479 if (err == NGX_ESRCH) {
|
|
|
480 ngx_processes[i].exited = 1;
|
|
|
481 ngx_processes[i].exiting = 0;
|
|
|
482 ngx_reap = 1;
|
|
|
483 }
|
|
|
484
|
|
|
485 continue;
|
|
|
486 }
|
|
|
487
|
|
|
488 if (signo != ngx_signal_value(NGX_REOPEN_SIGNAL)) {
|
|
|
489 ngx_processes[i].exiting = 1;
|
|
|
490 }
|
|
|
491 }
|
|
|
492 }
|
|
|
493
|
|
|
494
|
|
|
495 static ngx_uint_t ngx_reap_childs(ngx_cycle_t *cycle)
|
|
|
496 {
|
|
|
497 ngx_int_t i, n;
|
|
|
498 ngx_uint_t live;
|
|
|
499 ngx_channel_t ch;
|
|
|
500
|
|
|
501 ch.command = NGX_CMD_CLOSE_CHANNEL;
|
|
|
502 ch.fd = -1;
|
|
|
503
|
|
|
504 live = 0;
|
|
|
505 for (i = 0; i < ngx_last_process; i++) {
|
|
|
506
|
|
|
507 ngx_log_debug7(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
|
|
10
|
508 "child: %d %P e:%d t:%d d:%d r:%d j:%d",
|
|
0
|
509 i,
|
|
|
510 ngx_processes[i].pid,
|
|
|
511 ngx_processes[i].exiting,
|
|
|
512 ngx_processes[i].exited,
|
|
|
513 ngx_processes[i].detached,
|
|
|
514 ngx_processes[i].respawn,
|
|
|
515 ngx_processes[i].just_respawn);
|
|
|
516
|
|
|
517 if (ngx_processes[i].pid == -1) {
|
|
|
518 continue;
|
|
|
519 }
|
|
|
520
|
|
|
521 if (ngx_processes[i].exited) {
|
|
|
522
|
|
|
523 if (!ngx_processes[i].detached) {
|
|
|
524 ngx_close_channel(ngx_processes[i].channel, cycle->log);
|
|
|
525
|
|
|
526 ngx_processes[i].channel[0] = -1;
|
|
|
527 ngx_processes[i].channel[1] = -1;
|
|
|
528
|
|
|
529 ch.pid = ngx_processes[i].pid;
|
|
|
530 ch.slot = i;
|
|
|
531
|
|
|
532 for (n = 0; n < ngx_last_process; n++) {
|
|
|
533 if (ngx_processes[n].exited
|
|
|
534 || ngx_processes[n].pid == -1
|
|
|
535 || ngx_processes[n].channel[0] == -1)
|
|
|
536 {
|
|
|
537 continue;
|
|
|
538 }
|
|
|
539
|
|
|
540 ngx_log_debug3(NGX_LOG_DEBUG_CORE, cycle->log, 0,
|
|
10
|
541 "pass close channel s:%i pid:%P to:%P",
|
|
|
542 ch.slot, ch.pid, ngx_processes[n].pid);
|
|
0
|
543
|
|
|
544 /* TODO: NGX_AGAIN */
|
|
|
545
|
|
|
546 ngx_write_channel(ngx_processes[n].channel[0],
|
|
|
547 &ch, sizeof(ngx_channel_t), cycle->log);
|
|
|
548 }
|
|
|
549 }
|
|
|
550
|
|
|
551 if (ngx_processes[i].respawn
|
|
|
552 && !ngx_processes[i].exiting
|
|
|
553 && !ngx_terminate
|
|
|
554 && !ngx_quit)
|
|
|
555 {
|
|
|
556 if (ngx_spawn_process(cycle, ngx_processes[i].proc,
|
|
|
557 ngx_processes[i].data,
|
|
|
558 ngx_processes[i].name, i)
|
|
|
559 == NGX_ERROR)
|
|
|
560 {
|
|
|
561 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
|
|
|
562 "can not respawn %s", ngx_processes[i].name);
|
|
|
563 continue;
|
|
|
564 }
|
|
|
565
|
|
22
|
566
|
|
|
567 ch.command = NGX_CMD_OPEN_CHANNEL;
|
|
|
568 ch.pid = ngx_processes[ngx_process_slot].pid;
|
|
|
569 ch.slot = ngx_process_slot;
|
|
|
570 ch.fd = ngx_processes[ngx_process_slot].channel[0];
|
|
|
571
|
|
|
572 for (n = 0; n < ngx_last_process; n++) {
|
|
|
573
|
|
|
574 if (n == ngx_process_slot
|
|
|
575 || ngx_processes[n].pid == -1
|
|
|
576 || ngx_processes[n].channel[0] == -1)
|
|
|
577 {
|
|
|
578 continue;
|
|
|
579 }
|
|
|
580
|
|
|
581 ngx_log_debug6(NGX_LOG_DEBUG_CORE, cycle->log, 0,
|
|
|
582 "pass channel s:%d pid:%P fd:%d to s:%i pid:%P fd:%d",
|
|
|
583 ch.slot, ch.pid, ch.fd,
|
|
|
584 n, ngx_processes[n].pid,
|
|
|
585 ngx_processes[n].channel[0]);
|
|
|
586
|
|
|
587 /* TODO: NGX_AGAIN */
|
|
|
588
|
|
|
589 ngx_write_channel(ngx_processes[n].channel[0],
|
|
|
590 &ch, sizeof(ngx_channel_t), cycle->log);
|
|
|
591 }
|
|
|
592
|
|
0
|
593 live = 1;
|
|
|
594
|
|
|
595 continue;
|
|
|
596 }
|
|
|
597
|
|
|
598 if (ngx_processes[i].pid == ngx_new_binary) {
|
|
|
599 ngx_new_binary = 0;
|
|
|
600 if (ngx_noaccepting) {
|
|
|
601 ngx_restart = 1;
|
|
|
602 ngx_noaccepting = 0;
|
|
|
603 }
|
|
|
604 }
|
|
|
605
|
|
|
606 if (i == ngx_last_process - 1) {
|
|
|
607 ngx_last_process--;
|
|
|
608
|
|
|
609 } else {
|
|
|
610 ngx_processes[i].pid = -1;
|
|
|
611 }
|
|
|
612
|
|
|
613 } else if (ngx_processes[i].exiting || !ngx_processes[i].detached) {
|
|
|
614 live = 1;
|
|
|
615 }
|
|
|
616 }
|
|
|
617
|
|
|
618 return live;
|
|
|
619 }
|
|
|
620
|
|
|
621
|
|
2
|
622 static void ngx_master_exit(ngx_cycle_t *cycle)
|
|
0
|
623 {
|
|
|
624 ngx_delete_pidfile(cycle);
|
|
|
625
|
|
26
|
626 ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "exit");
|
|
0
|
627
|
|
|
628 ngx_destroy_pool(cycle->pool);
|
|
|
629
|
|
|
630 exit(0);
|
|
|
631 }
|
|
|
632
|
|
|
633
|
|
|
634 static void ngx_worker_process_cycle(ngx_cycle_t *cycle, void *data)
|
|
|
635 {
|
|
18
|
636 ngx_int_t n;
|
|
|
637 ngx_err_t err;
|
|
|
638 ngx_core_conf_t *ccf;
|
|
|
639
|
|
22
|
640 ngx_worker_process_init(cycle, 1);
|
|
0
|
641
|
|
|
642 ngx_setproctitle("worker process");
|
|
|
643
|
|
|
644 #if (NGX_THREADS)
|
|
|
645
|
|
|
646 if (ngx_time_mutex_init(cycle->log) == NGX_ERROR) {
|
|
|
647 /* fatal */
|
|
|
648 exit(2);
|
|
|
649 }
|
|
|
650
|
|
18
|
651 ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx, ngx_core_module);
|
|
|
652
|
|
0
|
653 if (ngx_threads_n) {
|
|
|
654 if (ngx_init_threads(ngx_threads_n,
|
|
|
655 ccf->thread_stack_size, cycle) == NGX_ERROR)
|
|
|
656 {
|
|
|
657 /* fatal */
|
|
|
658 exit(2);
|
|
|
659 }
|
|
|
660
|
|
|
661 err = ngx_thread_key_create(&ngx_core_tls_key);
|
|
|
662 if (err != 0) {
|
|
|
663 ngx_log_error(NGX_LOG_ALERT, cycle->log, err,
|
|
|
664 ngx_thread_key_create_n " failed");
|
|
|
665 /* fatal */
|
|
|
666 exit(2);
|
|
|
667 }
|
|
|
668
|
|
|
669 for (n = 0; n < ngx_threads_n; n++) {
|
|
|
670
|
|
|
671 if (!(ngx_threads[n].cv = ngx_cond_init(cycle->log))) {
|
|
|
672 /* fatal */
|
|
|
673 exit(2);
|
|
|
674 }
|
|
|
675
|
|
|
676 if (ngx_create_thread((ngx_tid_t *) &ngx_threads[n].tid,
|
|
|
677 ngx_worker_thread_cycle,
|
|
|
678 (void *) &ngx_threads[n], cycle->log) != 0)
|
|
|
679 {
|
|
|
680 /* fatal */
|
|
|
681 exit(2);
|
|
|
682 }
|
|
|
683 }
|
|
|
684 }
|
|
|
685
|
|
|
686 #endif
|
|
|
687
|
|
|
688 for ( ;; ) {
|
|
|
689 if (ngx_exiting
|
|
|
690 && ngx_event_timer_rbtree == &ngx_event_timer_sentinel)
|
|
|
691 {
|
|
26
|
692 ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "exiting");
|
|
0
|
693
|
|
|
694
|
|
|
695 #if (NGX_THREADS)
|
|
|
696 ngx_terminate = 1;
|
|
|
697
|
|
|
698 ngx_wakeup_worker_threads(cycle);
|
|
|
699 #endif
|
|
|
700
|
|
26
|
701 if (ngx_debug_quit) {
|
|
|
702 ngx_debug_point();
|
|
|
703 }
|
|
|
704
|
|
0
|
705 /*
|
|
|
706 * we do not destroy cycle->pool here because a signal handler
|
|
|
707 * that uses cycle->log can be called at this point
|
|
|
708 */
|
|
|
709 exit(0);
|
|
|
710 }
|
|
|
711
|
|
|
712 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, cycle->log, 0, "worker cycle");
|
|
|
713
|
|
|
714 ngx_process_events(cycle);
|
|
|
715
|
|
|
716 if (ngx_terminate) {
|
|
26
|
717 ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "exiting");
|
|
0
|
718
|
|
|
719 #if (NGX_THREADS)
|
|
|
720 ngx_wakeup_worker_threads(cycle);
|
|
|
721 #endif
|
|
|
722
|
|
|
723 /*
|
|
|
724 * we do not destroy cycle->pool here because a signal handler
|
|
|
725 * that uses cycle->log can be called at this point
|
|
|
726 */
|
|
|
727 exit(0);
|
|
|
728 }
|
|
|
729
|
|
|
730 if (ngx_quit) {
|
|
|
731 ngx_quit = 0;
|
|
26
|
732 ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0,
|
|
0
|
733 "gracefully shutting down");
|
|
|
734 ngx_setproctitle("worker process is shutting down");
|
|
|
735
|
|
|
736 if (!ngx_exiting) {
|
|
|
737 ngx_close_listening_sockets(cycle);
|
|
|
738 ngx_exiting = 1;
|
|
|
739 }
|
|
|
740 }
|
|
|
741
|
|
|
742 if (ngx_reopen) {
|
|
|
743 ngx_reopen = 0;
|
|
26
|
744 ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "reopening logs");
|
|
0
|
745 ngx_reopen_files(cycle, -1);
|
|
|
746 }
|
|
|
747 }
|
|
|
748 }
|
|
|
749
|
|
|
750
|
|
22
|
751 static void ngx_worker_process_init(ngx_cycle_t *cycle, ngx_uint_t priority)
|
|
16
|
752 {
|
|
|
753 sigset_t set;
|
|
|
754 ngx_int_t n;
|
|
|
755 ngx_uint_t i;
|
|
|
756 struct timeval tv;
|
|
|
757 ngx_core_conf_t *ccf;
|
|
|
758 ngx_listening_t *ls;
|
|
|
759
|
|
|
760 ngx_gettimeofday(&tv);
|
|
|
761
|
|
|
762 ngx_start_msec = (ngx_epoch_msec_t) tv.tv_sec * 1000 + tv.tv_usec / 1000;
|
|
|
763 ngx_old_elapsed_msec = 0;
|
|
|
764 ngx_elapsed_msec = 0;
|
|
|
765
|
|
|
766
|
|
|
767 ngx_process = NGX_PROCESS_WORKER;
|
|
|
768
|
|
|
769 ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx, ngx_core_module);
|
|
|
770
|
|
|
771 if (geteuid() == 0) {
|
|
22
|
772 if (priority && ccf->priority != 0) {
|
|
|
773 if (setpriority(PRIO_PROCESS, 0, ccf->priority) == -1) {
|
|
|
774 ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
|
|
|
775 "setpriority(%d) failed", ccf->priority);
|
|
|
776 }
|
|
|
777 }
|
|
|
778
|
|
16
|
779 if (setgid(ccf->group) == -1) {
|
|
|
780 ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
|
|
|
781 "setgid(%d) failed", ccf->group);
|
|
|
782 /* fatal */
|
|
|
783 exit(2);
|
|
|
784 }
|
|
|
785
|
|
22
|
786 if (initgroups(ccf->username, ccf->group) == -1) {
|
|
|
787 ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
|
|
|
788 "initgroups(%s, %d) failed",
|
|
|
789 ccf->username, ccf->group);
|
|
|
790 }
|
|
|
791
|
|
16
|
792 if (setuid(ccf->user) == -1) {
|
|
|
793 ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
|
|
|
794 "setuid(%d) failed", ccf->user);
|
|
|
795 /* fatal */
|
|
|
796 exit(2);
|
|
|
797 }
|
|
|
798 }
|
|
|
799
|
|
|
800 #if (NGX_HAVE_PR_SET_DUMPABLE)
|
|
|
801
|
|
|
802 /* allow coredump after setuid() in Linux 2.4.x */
|
|
|
803
|
|
|
804 if (prctl(PR_SET_DUMPABLE, 1, 0, 0, 0) == -1) {
|
|
|
805 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
|
|
|
806 "prctl(PR_SET_DUMPABLE) failed");
|
|
|
807 }
|
|
|
808
|
|
|
809 #endif
|
|
|
810
|
|
|
811 sigemptyset(&set);
|
|
|
812
|
|
|
813 if (sigprocmask(SIG_SETMASK, &set, NULL) == -1) {
|
|
|
814 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
|
|
|
815 "sigprocmask() failed");
|
|
|
816 }
|
|
|
817
|
|
|
818 ngx_init_temp_number();
|
|
|
819
|
|
|
820 /*
|
|
|
821 * disable deleting previous events for the listening sockets because
|
|
|
822 * in the worker processes there are no events at all at this point
|
|
|
823 */
|
|
|
824 ls = cycle->listening.elts;
|
|
|
825 for (i = 0; i < cycle->listening.nelts; i++) {
|
|
|
826 ls[i].remain = 0;
|
|
|
827 }
|
|
|
828
|
|
|
829 for (i = 0; ngx_modules[i]; i++) {
|
|
|
830 if (ngx_modules[i]->init_process) {
|
|
|
831 if (ngx_modules[i]->init_process(cycle) == NGX_ERROR) {
|
|
|
832 /* fatal */
|
|
|
833 exit(2);
|
|
|
834 }
|
|
|
835 }
|
|
|
836 }
|
|
|
837
|
|
|
838 for (n = 0; n < ngx_last_process; n++) {
|
|
|
839
|
|
|
840 if (ngx_processes[n].pid == -1) {
|
|
|
841 continue;
|
|
|
842 }
|
|
|
843
|
|
|
844 if (n == ngx_process_slot) {
|
|
|
845 continue;
|
|
|
846 }
|
|
|
847
|
|
|
848 if (ngx_processes[n].channel[1] == -1) {
|
|
|
849 continue;
|
|
|
850 }
|
|
|
851
|
|
|
852 if (close(ngx_processes[n].channel[1]) == -1) {
|
|
|
853 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
|
|
|
854 "close() channel failed");
|
|
|
855 }
|
|
|
856 }
|
|
|
857
|
|
|
858 if (close(ngx_processes[ngx_process_slot].channel[0]) == -1) {
|
|
|
859 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
|
|
|
860 "close() channel failed");
|
|
|
861 }
|
|
|
862
|
|
|
863 #if 0
|
|
|
864 ngx_last_process = 0;
|
|
|
865 #endif
|
|
|
866
|
|
|
867 if (ngx_add_channel_event(cycle, ngx_channel, NGX_READ_EVENT,
|
|
|
868 ngx_channel_handler) == NGX_ERROR)
|
|
|
869 {
|
|
|
870 /* fatal */
|
|
|
871 exit(2);
|
|
|
872 }
|
|
|
873 }
|
|
|
874
|
|
|
875
|
|
0
|
876 static void ngx_channel_handler(ngx_event_t *ev)
|
|
|
877 {
|
|
|
878 ngx_int_t n;
|
|
|
879 ngx_channel_t ch;
|
|
|
880 ngx_connection_t *c;
|
|
|
881
|
|
16
|
882 if (ev->timedout) {
|
|
|
883 ev->timedout = 0;
|
|
|
884 return;
|
|
|
885 }
|
|
|
886
|
|
0
|
887 c = ev->data;
|
|
|
888
|
|
|
889 ngx_log_debug0(NGX_LOG_DEBUG_CORE, ev->log, 0, "channel handler");
|
|
|
890
|
|
|
891 n = ngx_read_channel(c->fd, &ch, sizeof(ngx_channel_t), ev->log);
|
|
|
892
|
|
10
|
893 ngx_log_debug1(NGX_LOG_DEBUG_CORE, ev->log, 0, "channel: %i", n);
|
|
0
|
894
|
|
10
|
895 if (n == NGX_ERROR) {
|
|
|
896 if (close(c->fd) == -1) {
|
|
|
897 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno,
|
|
|
898 "close() channel failed");
|
|
|
899 }
|
|
|
900
|
|
|
901 c->fd = -1;
|
|
|
902 return;
|
|
|
903 }
|
|
|
904
|
|
|
905 if (n == NGX_AGAIN) {
|
|
0
|
906 return;
|
|
|
907 }
|
|
|
908
|
|
|
909 ngx_log_debug1(NGX_LOG_DEBUG_CORE, ev->log, 0,
|
|
|
910 "channel command: %d", ch.command);
|
|
|
911
|
|
|
912 switch (ch.command) {
|
|
|
913
|
|
|
914 case NGX_CMD_QUIT:
|
|
|
915 ngx_quit = 1;
|
|
|
916 break;
|
|
|
917
|
|
|
918 case NGX_CMD_TERMINATE:
|
|
|
919 ngx_terminate = 1;
|
|
|
920 break;
|
|
|
921
|
|
|
922 case NGX_CMD_REOPEN:
|
|
|
923 ngx_reopen = 1;
|
|
|
924 break;
|
|
|
925
|
|
|
926 case NGX_CMD_OPEN_CHANNEL:
|
|
|
927
|
|
|
928 ngx_log_debug3(NGX_LOG_DEBUG_CORE, ev->log, 0,
|
|
10
|
929 "get channel s:%i pid:%P fd:%d", ch.slot, ch.pid, ch.fd);
|
|
0
|
930
|
|
|
931 ngx_processes[ch.slot].pid = ch.pid;
|
|
|
932 ngx_processes[ch.slot].channel[0] = ch.fd;
|
|
|
933 break;
|
|
|
934
|
|
|
935 case NGX_CMD_CLOSE_CHANNEL:
|
|
|
936
|
|
|
937 ngx_log_debug4(NGX_LOG_DEBUG_CORE, ev->log, 0,
|
|
10
|
938 "close channel s:%i pid:%P our:%P fd:%d",
|
|
0
|
939 ch.slot, ch.pid, ngx_processes[ch.slot].pid,
|
|
|
940 ngx_processes[ch.slot].channel[0]);
|
|
|
941
|
|
|
942 if (close(ngx_processes[ch.slot].channel[0]) == -1) {
|
|
16
|
943 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno,
|
|
|
944 "close() channel failed");
|
|
0
|
945 }
|
|
|
946
|
|
|
947 ngx_processes[ch.slot].channel[0] = -1;
|
|
|
948 break;
|
|
|
949 }
|
|
|
950 }
|
|
|
951
|
|
|
952
|
|
|
953 #if (NGX_THREADS)
|
|
|
954
|
|
|
955 static void ngx_wakeup_worker_threads(ngx_cycle_t *cycle)
|
|
|
956 {
|
|
|
957 ngx_int_t i;
|
|
|
958 ngx_uint_t live;
|
|
|
959
|
|
|
960 for ( ;; ) {
|
|
|
961
|
|
|
962 live = 0;
|
|
|
963
|
|
|
964 for (i = 0; i < ngx_threads_n; i++) {
|
|
|
965 if (ngx_threads[i].state < NGX_THREAD_EXIT) {
|
|
18
|
966 if (ngx_cond_signal(ngx_threads[i].cv) == NGX_ERROR) {
|
|
|
967 ngx_threads[i].state = NGX_THREAD_DONE;
|
|
0
|
968
|
|
|
969 } else {
|
|
|
970 live = 1;
|
|
|
971 }
|
|
|
972 }
|
|
|
973
|
|
|
974 if (ngx_threads[i].state == NGX_THREAD_EXIT) {
|
|
|
975 ngx_thread_join(ngx_threads[i].tid, NULL);
|
|
|
976 ngx_threads[i].state = NGX_THREAD_DONE;
|
|
|
977 }
|
|
|
978 }
|
|
|
979
|
|
|
980 if (live == 0) {
|
|
|
981 ngx_log_debug0(NGX_LOG_DEBUG_CORE, cycle->log, 0,
|
|
|
982 "all worker threads are joined");
|
|
|
983
|
|
|
984 /* STUB */
|
|
|
985 ngx_done_events(cycle);
|
|
|
986 ngx_mutex_destroy(ngx_event_timer_mutex);
|
|
|
987 ngx_mutex_destroy(ngx_posted_events_mutex);
|
|
|
988
|
|
|
989 return;
|
|
|
990 }
|
|
|
991
|
|
|
992 ngx_sched_yield();
|
|
|
993 }
|
|
|
994 }
|
|
|
995
|
|
|
996
|
|
10
|
997 static void *ngx_worker_thread_cycle(void *data)
|
|
0
|
998 {
|
|
|
999 ngx_thread_t *thr = data;
|
|
|
1000
|
|
|
1001 sigset_t set;
|
|
|
1002 ngx_err_t err;
|
|
|
1003 ngx_core_tls_t *tls;
|
|
|
1004 ngx_cycle_t *cycle;
|
|
|
1005
|
|
|
1006 cycle = (ngx_cycle_t *) ngx_cycle;
|
|
|
1007
|
|
|
1008 sigemptyset(&set);
|
|
|
1009 sigaddset(&set, ngx_signal_value(NGX_RECONFIGURE_SIGNAL));
|
|
|
1010 sigaddset(&set, ngx_signal_value(NGX_REOPEN_SIGNAL));
|
|
|
1011 sigaddset(&set, ngx_signal_value(NGX_CHANGEBIN_SIGNAL));
|
|
|
1012
|
|
|
1013 err = ngx_thread_sigmask(SIG_BLOCK, &set, NULL);
|
|
|
1014 if (err) {
|
|
|
1015 ngx_log_error(NGX_LOG_ALERT, cycle->log, err,
|
|
|
1016 ngx_thread_sigmask_n " failed");
|
|
|
1017 return (void *) 1;
|
|
|
1018 }
|
|
|
1019
|
|
|
1020 ngx_log_debug1(NGX_LOG_DEBUG_CORE, cycle->log, 0,
|
|
10
|
1021 "thread " NGX_TID_T_FMT " started", ngx_thread_self());
|
|
0
|
1022
|
|
|
1023 ngx_setthrtitle("worker thread");
|
|
|
1024
|
|
|
1025 if (!(tls = ngx_calloc(sizeof(ngx_core_tls_t), cycle->log))) {
|
|
|
1026 return (void *) 1;
|
|
|
1027 }
|
|
|
1028
|
|
|
1029 err = ngx_thread_set_tls(ngx_core_tls_key, tls);
|
|
|
1030 if (err != 0) {
|
|
|
1031 ngx_log_error(NGX_LOG_ALERT, cycle->log, err,
|
|
|
1032 ngx_thread_set_tls_n " failed");
|
|
|
1033 return (void *) 1;
|
|
|
1034 }
|
|
|
1035
|
|
|
1036 if (ngx_mutex_lock(ngx_posted_events_mutex) == NGX_ERROR) {
|
|
|
1037 return (void *) 1;
|
|
|
1038 }
|
|
|
1039
|
|
|
1040 for ( ;; ) {
|
|
|
1041 thr->state = NGX_THREAD_FREE;
|
|
|
1042
|
|
|
1043 if (ngx_cond_wait(thr->cv, ngx_posted_events_mutex) == NGX_ERROR) {
|
|
|
1044 return (void *) 1;
|
|
|
1045 }
|
|
|
1046
|
|
|
1047 if (ngx_terminate) {
|
|
|
1048 thr->state = NGX_THREAD_EXIT;
|
|
|
1049
|
|
|
1050 ngx_mutex_unlock(ngx_posted_events_mutex);
|
|
|
1051
|
|
|
1052 ngx_log_debug1(NGX_LOG_DEBUG_CORE, cycle->log, 0,
|
|
10
|
1053 "thread " NGX_TID_T_FMT " is done",
|
|
|
1054 ngx_thread_self());
|
|
0
|
1055
|
|
|
1056 return (void *) 0;
|
|
|
1057 }
|
|
|
1058
|
|
|
1059 thr->state = NGX_THREAD_BUSY;
|
|
|
1060
|
|
|
1061 if (ngx_event_thread_process_posted(cycle) == NGX_ERROR) {
|
|
|
1062 return (void *) 1;
|
|
|
1063 }
|
|
|
1064
|
|
|
1065 if (ngx_event_thread_process_posted(cycle) == NGX_ERROR) {
|
|
|
1066 return (void *) 1;
|
|
|
1067 }
|
|
|
1068
|
|
|
1069 if (ngx_process_changes) {
|
|
|
1070 if (ngx_process_changes(cycle, 1) == NGX_ERROR) {
|
|
|
1071 return (void *) 1;
|
|
|
1072 }
|
|
|
1073 }
|
|
|
1074 }
|
|
|
1075 }
|
|
|
1076
|
|
|
1077 #endif
|
|
16
|
1078
|
|
|
1079
|
|
|
1080 static void ngx_garbage_collector_cycle(ngx_cycle_t *cycle, void *data)
|
|
|
1081 {
|
|
|
1082 ngx_uint_t i;
|
|
|
1083 ngx_gc_t ctx;
|
|
|
1084 ngx_path_t **path;
|
|
|
1085 ngx_event_t *ev;
|
|
|
1086
|
|
22
|
1087 ngx_worker_process_init(cycle, 0);
|
|
16
|
1088
|
|
|
1089 ev = &cycle->read_events[ngx_channel];
|
|
|
1090
|
|
|
1091 ngx_accept_mutex = NULL;
|
|
|
1092
|
|
|
1093 ngx_setproctitle("garbage collector");
|
|
|
1094
|
|
|
1095 #if 0
|
|
|
1096 ngx_add_timer(ev, 60 * 1000);
|
|
|
1097 #endif
|
|
|
1098
|
|
|
1099 for ( ;; ) {
|
|
|
1100
|
|
|
1101 if (ngx_terminate || ngx_quit) {
|
|
26
|
1102 ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "exiting");
|
|
16
|
1103 exit(0);
|
|
|
1104 }
|
|
|
1105
|
|
|
1106 if (ngx_reopen) {
|
|
|
1107 ngx_reopen = 0;
|
|
26
|
1108 ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "reopening logs");
|
|
16
|
1109 ngx_reopen_files(cycle, -1);
|
|
|
1110 }
|
|
|
1111
|
|
|
1112 path = cycle->pathes.elts;
|
|
|
1113 for (i = 0; i < cycle->pathes.nelts; i++) {
|
|
|
1114 ctx.path = path[i];
|
|
|
1115 ctx.log = cycle->log;
|
|
|
1116 ctx.handler = path[i]->gc_handler;
|
|
|
1117
|
|
|
1118 ngx_collect_garbage(&ctx, &path[i]->name, 0);
|
|
|
1119 }
|
|
|
1120
|
|
|
1121 ngx_add_timer(ev, 60 * 60 * 1000);
|
|
|
1122
|
|
|
1123 ngx_process_events(cycle);
|
|
|
1124 }
|
|
|
1125 }
|
