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