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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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4
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178
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179 if (!ngx_noaccepting) {
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180 ngx_start_worker_processes(cycle, ccf->worker_processes,
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181 NGX_PROCESS_JUST_RESPAWN);
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182 live = 1;
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183 ngx_signal_worker_processes(cycle,
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0
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184 ngx_signal_value(NGX_SHUTDOWN_SIGNAL));
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4
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185 }
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0
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186 }
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187
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188 if (ngx_reconfigure) {
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189 ngx_reconfigure = 0;
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190
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191 if (ngx_new_binary) {
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192 ngx_log_error(NGX_LOG_INFO, cycle->log, 0, "start new workers");
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193
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194 ngx_start_worker_processes(cycle, ccf->worker_processes,
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195 NGX_PROCESS_RESPAWN);
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196 ngx_noaccepting = 0;
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197
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198 continue;
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199 }
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200
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201 ngx_log_error(NGX_LOG_INFO, cycle->log, 0, "reconfiguring");
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202
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203 cycle = ngx_init_cycle(cycle);
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204 if (cycle == NULL) {
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205 cycle = (ngx_cycle_t *) ngx_cycle;
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206 continue;
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207 }
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208
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209 ngx_cycle = cycle;
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210 ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx,
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211 ngx_core_module);
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212 ngx_start_worker_processes(cycle, ccf->worker_processes,
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213 NGX_PROCESS_JUST_RESPAWN);
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214 live = 1;
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215 ngx_signal_worker_processes(cycle,
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216 ngx_signal_value(NGX_SHUTDOWN_SIGNAL));
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217 }
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218
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219 if (ngx_restart) {
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220 ngx_restart = 0;
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221 ngx_start_worker_processes(cycle, ccf->worker_processes,
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222 NGX_PROCESS_RESPAWN);
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223 live = 1;
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224 }
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225
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226 if (ngx_reopen) {
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227 ngx_reopen = 0;
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228 ngx_log_error(NGX_LOG_INFO, cycle->log, 0, "reopening logs");
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229 ngx_reopen_files(cycle, ccf->user);
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230 ngx_signal_worker_processes(cycle,
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231 ngx_signal_value(NGX_REOPEN_SIGNAL));
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232 }
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233
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234 if (ngx_change_binary) {
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235 ngx_change_binary = 0;
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236 ngx_log_error(NGX_LOG_INFO, cycle->log, 0, "changing binary");
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2
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237 ngx_new_binary = ngx_exec_new_binary(cycle, ngx_argv);
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0
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238 }
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239
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240 if (ngx_noaccept) {
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241 ngx_noaccept = 0;
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242 ngx_noaccepting = 1;
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243 ngx_signal_worker_processes(cycle,
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244 ngx_signal_value(NGX_SHUTDOWN_SIGNAL));
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245 }
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246 }
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247 }
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248
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249
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2
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250 void ngx_single_process_cycle(ngx_cycle_t *cycle)
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0
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251 {
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252 ngx_uint_t i;
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253
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254 ngx_init_temp_number();
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255
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256 for (i = 0; ngx_modules[i]; i++) {
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257 if (ngx_modules[i]->init_process) {
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258 if (ngx_modules[i]->init_process(cycle) == NGX_ERROR) {
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259 /* fatal */
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260 exit(2);
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261 }
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262 }
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263 }
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264
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265 for ( ;; ) {
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266 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, cycle->log, 0, "worker cycle");
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267
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268 ngx_process_events(cycle);
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269
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270 if (ngx_terminate || ngx_quit) {
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2
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271 ngx_master_exit(cycle);
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0
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272 }
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273
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274 if (ngx_reconfigure) {
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275 ngx_reconfigure = 0;
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276 ngx_log_error(NGX_LOG_INFO, cycle->log, 0, "reconfiguring");
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277
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278 cycle = ngx_init_cycle(cycle);
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279 if (cycle == NULL) {
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280 cycle = (ngx_cycle_t *) ngx_cycle;
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281 continue;
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282 }
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283
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284 ngx_cycle = cycle;
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285 }
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286
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287 if (ngx_reopen) {
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288 ngx_reopen = 0;
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289 ngx_log_error(NGX_LOG_INFO, cycle->log, 0, "reopening logs");
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290 ngx_reopen_files(cycle, (ngx_uid_t) -1);
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291 }
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292 }
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293 }
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294
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295
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296 static void ngx_start_worker_processes(ngx_cycle_t *cycle, ngx_int_t n,
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297 ngx_int_t type)
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298 {
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299 ngx_int_t i;
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300 ngx_channel_t ch;
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301 struct itimerval itv;
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302
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303 ngx_log_error(NGX_LOG_INFO, cycle->log, 0, "start worker processes");
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304
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305 ch.command = NGX_CMD_OPEN_CHANNEL;
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306
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307 while (n--) {
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308 ngx_spawn_process(cycle, ngx_worker_process_cycle, NULL,
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309 "worker process", type);
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310
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311 ch.pid = ngx_processes[ngx_process_slot].pid;
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312 ch.slot = ngx_process_slot;
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313 ch.fd = ngx_processes[ngx_process_slot].channel[0];
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314
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315 for (i = 0; i < ngx_last_process; i++) {
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316
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317 if (i == ngx_process_slot
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318 || ngx_processes[i].pid == -1
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319 || ngx_processes[i].channel[0] == -1)
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320 {
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321 continue;
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322 }
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323
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324 ngx_log_debug6(NGX_LOG_DEBUG_CORE, cycle->log, 0,
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325 "pass channel s:%d pid:" PID_T_FMT
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326 " fd:%d to s:%d pid:" PID_T_FMT " fd:%d",
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327 ch.slot, ch.pid, ch.fd,
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328 i, ngx_processes[i].pid,
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329 ngx_processes[i].channel[0]);
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330
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331 /* TODO: NGX_AGAIN */
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332
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333 ngx_write_channel(ngx_processes[i].channel[0],
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334 &ch, sizeof(ngx_channel_t), cycle->log);
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335 }
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336 }
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337
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338 /*
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339 * we have to limit the maximum life time of the worker processes
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340 * by 10 days because our millisecond event timer is limited
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341 * by 24 days on 32-bit platforms
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342 */
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343
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344 itv.it_interval.tv_sec = 0;
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345 itv.it_interval.tv_usec = 0;
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346 itv.it_value.tv_sec = 10 * 24 * 60 * 60;
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347 itv.it_value.tv_usec = 0;
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348
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349 if (setitimer(ITIMER_REAL, &itv, NULL) == -1) {
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350 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
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351 "setitimer() failed");
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352 }
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353 }
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354
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355
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356 static void ngx_signal_worker_processes(ngx_cycle_t *cycle, int signo)
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357 {
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358 ngx_int_t i;
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359 ngx_err_t err;
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360 ngx_channel_t ch;
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361
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362
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363 switch (signo) {
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364
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365 case ngx_signal_value(NGX_SHUTDOWN_SIGNAL):
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366 ch.command = NGX_CMD_QUIT;
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367 break;
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368
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369 case ngx_signal_value(NGX_TERMINATE_SIGNAL):
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370 ch.command = NGX_CMD_TERMINATE;
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371 break;
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372
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373 case ngx_signal_value(NGX_REOPEN_SIGNAL):
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374 ch.command = NGX_CMD_REOPEN;
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375 break;
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376
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377 default:
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378 ch.command = 0;
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379 }
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380
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381 ch.fd = -1;
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382
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383
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384 for (i = 0; i < ngx_last_process; i++) {
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385
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386 ngx_log_debug7(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
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387 "child: %d " PID_T_FMT " e:%d t:%d d:%d r:%d j:%d",
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388 i,
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389 ngx_processes[i].pid,
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390 ngx_processes[i].exiting,
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391 ngx_processes[i].exited,
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392 ngx_processes[i].detached,
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393 ngx_processes[i].respawn,
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394 ngx_processes[i].just_respawn);
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395
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396 if (ngx_processes[i].detached || ngx_processes[i].pid == -1) {
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397 continue;
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398 }
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399
|
|
|
400 if (ngx_processes[i].just_respawn) {
|
|
|
401 ngx_processes[i].just_respawn = 0;
|
|
|
402 continue;
|
|
|
403 }
|
|
|
404
|
|
|
405 if (ngx_processes[i].exiting
|
|
|
406 && signo == ngx_signal_value(NGX_SHUTDOWN_SIGNAL))
|
|
|
407 {
|
|
|
408 continue;
|
|
|
409 }
|
|
|
410
|
|
|
411 if (ch.command) {
|
|
|
412 if (ngx_write_channel(ngx_processes[i].channel[0],
|
|
|
413 &ch, sizeof(ngx_channel_t), cycle->log) == NGX_OK)
|
|
|
414 {
|
|
|
415 if (signo != ngx_signal_value(NGX_REOPEN_SIGNAL)) {
|
|
|
416 ngx_processes[i].exiting = 1;
|
|
|
417 }
|
|
|
418
|
|
|
419 continue;
|
|
|
420 }
|
|
|
421 }
|
|
|
422
|
|
|
423 ngx_log_debug2(NGX_LOG_DEBUG_CORE, cycle->log, 0,
|
|
|
424 "kill (" PID_T_FMT ", %d)" ,
|
|
|
425 ngx_processes[i].pid, signo);
|
|
|
426
|
|
|
427 if (kill(ngx_processes[i].pid, signo) == -1) {
|
|
|
428 err = ngx_errno;
|
|
|
429 ngx_log_error(NGX_LOG_ALERT, cycle->log, err,
|
|
|
430 "kill(%d, %d) failed",
|
|
|
431 ngx_processes[i].pid, signo);
|
|
|
432
|
|
|
433 if (err == NGX_ESRCH) {
|
|
|
434 ngx_processes[i].exited = 1;
|
|
|
435 ngx_processes[i].exiting = 0;
|
|
|
436 ngx_reap = 1;
|
|
|
437 }
|
|
|
438
|
|
|
439 continue;
|
|
|
440 }
|
|
|
441
|
|
|
442 if (signo != ngx_signal_value(NGX_REOPEN_SIGNAL)) {
|
|
|
443 ngx_processes[i].exiting = 1;
|
|
|
444 }
|
|
|
445 }
|
|
|
446 }
|
|
|
447
|
|
|
448
|
|
|
449 static ngx_uint_t ngx_reap_childs(ngx_cycle_t *cycle)
|
|
|
450 {
|
|
|
451 ngx_int_t i, n;
|
|
|
452 ngx_uint_t live;
|
|
|
453 ngx_channel_t ch;
|
|
|
454
|
|
|
455 ch.command = NGX_CMD_CLOSE_CHANNEL;
|
|
|
456 ch.fd = -1;
|
|
|
457
|
|
|
458 live = 0;
|
|
|
459 for (i = 0; i < ngx_last_process; i++) {
|
|
|
460
|
|
|
461 ngx_log_debug7(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
|
|
|
462 "child: %d " PID_T_FMT " e:%d t:%d d:%d r:%d j:%d",
|
|
|
463 i,
|
|
|
464 ngx_processes[i].pid,
|
|
|
465 ngx_processes[i].exiting,
|
|
|
466 ngx_processes[i].exited,
|
|
|
467 ngx_processes[i].detached,
|
|
|
468 ngx_processes[i].respawn,
|
|
|
469 ngx_processes[i].just_respawn);
|
|
|
470
|
|
|
471 if (ngx_processes[i].pid == -1) {
|
|
|
472 continue;
|
|
|
473 }
|
|
|
474
|
|
|
475 if (ngx_processes[i].exited) {
|
|
|
476
|
|
|
477 if (!ngx_processes[i].detached) {
|
|
|
478 ngx_close_channel(ngx_processes[i].channel, cycle->log);
|
|
|
479
|
|
|
480 ngx_processes[i].channel[0] = -1;
|
|
|
481 ngx_processes[i].channel[1] = -1;
|
|
|
482
|
|
|
483 ch.pid = ngx_processes[i].pid;
|
|
|
484 ch.slot = i;
|
|
|
485
|
|
|
486 for (n = 0; n < ngx_last_process; n++) {
|
|
|
487 if (ngx_processes[n].exited
|
|
|
488 || ngx_processes[n].pid == -1
|
|
|
489 || ngx_processes[n].channel[0] == -1)
|
|
|
490 {
|
|
|
491 continue;
|
|
|
492 }
|
|
|
493
|
|
|
494 ngx_log_debug3(NGX_LOG_DEBUG_CORE, cycle->log, 0,
|
|
|
495 "pass close channel s:%d pid:" PID_T_FMT
|
|
|
496 " to:" PID_T_FMT, ch.slot, ch.pid, ngx_processes[n].pid);
|
|
|
497
|
|
|
498 /* TODO: NGX_AGAIN */
|
|
|
499
|
|
|
500 ngx_write_channel(ngx_processes[n].channel[0],
|
|
|
501 &ch, sizeof(ngx_channel_t), cycle->log);
|
|
|
502 }
|
|
|
503 }
|
|
|
504
|
|
|
505 if (ngx_processes[i].respawn
|
|
|
506 && !ngx_processes[i].exiting
|
|
|
507 && !ngx_terminate
|
|
|
508 && !ngx_quit)
|
|
|
509 {
|
|
|
510 if (ngx_spawn_process(cycle, ngx_processes[i].proc,
|
|
|
511 ngx_processes[i].data,
|
|
|
512 ngx_processes[i].name, i)
|
|
|
513 == NGX_ERROR)
|
|
|
514 {
|
|
|
515 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
|
|
|
516 "can not respawn %s", ngx_processes[i].name);
|
|
|
517 continue;
|
|
|
518 }
|
|
|
519
|
|
|
520 live = 1;
|
|
|
521
|
|
|
522 continue;
|
|
|
523 }
|
|
|
524
|
|
|
525 if (ngx_processes[i].pid == ngx_new_binary) {
|
|
|
526 ngx_new_binary = 0;
|
|
|
527 if (ngx_noaccepting) {
|
|
|
528 ngx_restart = 1;
|
|
|
529 ngx_noaccepting = 0;
|
|
|
530 }
|
|
|
531 }
|
|
|
532
|
|
|
533 if (i == ngx_last_process - 1) {
|
|
|
534 ngx_last_process--;
|
|
|
535
|
|
|
536 } else {
|
|
|
537 ngx_processes[i].pid = -1;
|
|
|
538 }
|
|
|
539
|
|
|
540 } else if (ngx_processes[i].exiting || !ngx_processes[i].detached) {
|
|
|
541 live = 1;
|
|
|
542 }
|
|
|
543 }
|
|
|
544
|
|
|
545 return live;
|
|
|
546 }
|
|
|
547
|
|
|
548
|
|
2
|
549 static void ngx_master_exit(ngx_cycle_t *cycle)
|
|
0
|
550 {
|
|
|
551 ngx_delete_pidfile(cycle);
|
|
|
552
|
|
|
553 ngx_log_error(NGX_LOG_INFO, cycle->log, 0, "exit");
|
|
|
554
|
|
|
555 ngx_destroy_pool(cycle->pool);
|
|
|
556
|
|
|
557 exit(0);
|
|
|
558 }
|
|
|
559
|
|
|
560
|
|
|
561 static void ngx_worker_process_cycle(ngx_cycle_t *cycle, void *data)
|
|
|
562 {
|
|
|
563 sigset_t set;
|
|
|
564 ngx_err_t err;
|
|
|
565 ngx_int_t n;
|
|
|
566 ngx_uint_t i;
|
|
|
567 struct timeval tv;
|
|
|
568 ngx_listening_t *ls;
|
|
|
569 ngx_core_conf_t *ccf;
|
|
|
570 ngx_connection_t *c;
|
|
|
571
|
|
|
572
|
|
|
573 ngx_gettimeofday(&tv);
|
|
|
574
|
|
|
575 ngx_start_msec = (ngx_epoch_msec_t) tv.tv_sec * 1000 + tv.tv_usec / 1000;
|
|
|
576 ngx_old_elapsed_msec = 0;
|
|
|
577 ngx_elapsed_msec = 0;
|
|
|
578
|
|
|
579
|
|
|
580 ngx_process = NGX_PROCESS_WORKER;
|
|
|
581
|
|
|
582 ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx, ngx_core_module);
|
|
|
583
|
|
4
|
584 if (geteuid() == 0) {
|
|
0
|
585 if (setgid(ccf->group) == -1) {
|
|
|
586 ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
|
|
|
587 "setgid(%d) failed", ccf->group);
|
|
|
588 /* fatal */
|
|
|
589 exit(2);
|
|
|
590 }
|
|
|
591
|
|
|
592 if (setuid(ccf->user) == -1) {
|
|
|
593 ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
|
|
|
594 "setuid(%d) failed", ccf->user);
|
|
|
595 /* fatal */
|
|
|
596 exit(2);
|
|
|
597 }
|
|
|
598 }
|
|
|
599
|
|
4
|
600 #if (NGX_HAVE_PR_SET_DUMPABLE)
|
|
0
|
601
|
|
|
602 /* allow coredump after setuid() in Linux 2.4.x */
|
|
|
603
|
|
|
604 if (prctl(PR_SET_DUMPABLE, 1, 0, 0, 0) == -1) {
|
|
|
605 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
|
|
|
606 "prctl(PR_SET_DUMPABLE) failed");
|
|
|
607 }
|
|
|
608
|
|
|
609 #endif
|
|
|
610
|
|
|
611 sigemptyset(&set);
|
|
|
612
|
|
|
613 if (sigprocmask(SIG_SETMASK, &set, NULL) == -1) {
|
|
|
614 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
|
|
|
615 "sigprocmask() failed");
|
|
|
616 }
|
|
|
617
|
|
|
618 ngx_init_temp_number();
|
|
|
619
|
|
|
620 /*
|
|
|
621 * disable deleting previous events for the listening sockets because
|
|
|
622 * in the worker processes there are no events at all at this point
|
|
|
623 */
|
|
|
624 ls = cycle->listening.elts;
|
|
|
625 for (i = 0; i < cycle->listening.nelts; i++) {
|
|
|
626 ls[i].remain = 0;
|
|
|
627 }
|
|
|
628
|
|
|
629 for (i = 0; ngx_modules[i]; i++) {
|
|
|
630 if (ngx_modules[i]->init_process) {
|
|
|
631 if (ngx_modules[i]->init_process(cycle) == NGX_ERROR) {
|
|
|
632 /* fatal */
|
|
|
633 exit(2);
|
|
|
634 }
|
|
|
635 }
|
|
|
636 }
|
|
|
637
|
|
|
638 for (n = 0; n < ngx_last_process; n++) {
|
|
|
639
|
|
|
640 if (ngx_processes[n].pid == -1) {
|
|
|
641 continue;
|
|
|
642 }
|
|
|
643
|
|
|
644 if (n == ngx_process_slot) {
|
|
|
645 continue;
|
|
|
646 }
|
|
|
647
|
|
|
648 if (ngx_processes[n].channel[1] == -1) {
|
|
|
649 continue;
|
|
|
650 }
|
|
|
651
|
|
|
652 if (close(ngx_processes[n].channel[1]) == -1) {
|
|
|
653 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
|
|
|
654 "close() failed");
|
|
|
655 }
|
|
|
656 }
|
|
|
657
|
|
|
658 if (close(ngx_processes[ngx_process_slot].channel[0]) == -1) {
|
|
|
659 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
|
|
|
660 "close() failed");
|
|
|
661 }
|
|
|
662
|
|
|
663 #if 0
|
|
|
664 ngx_last_process = 0;
|
|
|
665 #endif
|
|
|
666
|
|
|
667 if (ngx_add_channel_event(cycle, ngx_channel, NGX_READ_EVENT,
|
|
|
668 ngx_channel_handler) == NGX_ERROR)
|
|
|
669 {
|
|
|
670 /* fatal */
|
|
|
671 exit(2);
|
|
|
672 }
|
|
|
673
|
|
|
674 ngx_setproctitle("worker process");
|
|
|
675
|
|
|
676 #if (NGX_THREADS)
|
|
|
677
|
|
|
678 if (ngx_time_mutex_init(cycle->log) == NGX_ERROR) {
|
|
|
679 /* fatal */
|
|
|
680 exit(2);
|
|
|
681 }
|
|
|
682
|
|
|
683 if (ngx_threads_n) {
|
|
|
684 if (ngx_init_threads(ngx_threads_n,
|
|
|
685 ccf->thread_stack_size, cycle) == NGX_ERROR)
|
|
|
686 {
|
|
|
687 /* fatal */
|
|
|
688 exit(2);
|
|
|
689 }
|
|
|
690
|
|
|
691 err = ngx_thread_key_create(&ngx_core_tls_key);
|
|
|
692 if (err != 0) {
|
|
|
693 ngx_log_error(NGX_LOG_ALERT, cycle->log, err,
|
|
|
694 ngx_thread_key_create_n " failed");
|
|
|
695 /* fatal */
|
|
|
696 exit(2);
|
|
|
697 }
|
|
|
698
|
|
|
699 for (n = 0; n < ngx_threads_n; n++) {
|
|
|
700
|
|
|
701 if (!(ngx_threads[n].cv = ngx_cond_init(cycle->log))) {
|
|
|
702 /* fatal */
|
|
|
703 exit(2);
|
|
|
704 }
|
|
|
705
|
|
|
706 if (ngx_create_thread((ngx_tid_t *) &ngx_threads[n].tid,
|
|
|
707 ngx_worker_thread_cycle,
|
|
|
708 (void *) &ngx_threads[n], cycle->log) != 0)
|
|
|
709 {
|
|
|
710 /* fatal */
|
|
|
711 exit(2);
|
|
|
712 }
|
|
|
713 }
|
|
|
714 }
|
|
|
715
|
|
|
716 #endif
|
|
|
717
|
|
|
718 for ( ;; ) {
|
|
|
719 if (ngx_exiting
|
|
|
720 && ngx_event_timer_rbtree == &ngx_event_timer_sentinel)
|
|
|
721 {
|
|
|
722 ngx_log_error(NGX_LOG_INFO, cycle->log, 0, "exiting");
|
|
|
723
|
|
|
724
|
|
|
725 #if (NGX_THREADS)
|
|
|
726 ngx_terminate = 1;
|
|
|
727
|
|
|
728 ngx_wakeup_worker_threads(cycle);
|
|
|
729 #endif
|
|
|
730
|
|
|
731 /*
|
|
|
732 * we do not destroy cycle->pool here because a signal handler
|
|
|
733 * that uses cycle->log can be called at this point
|
|
|
734 */
|
|
|
735 exit(0);
|
|
|
736 }
|
|
|
737
|
|
|
738 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, cycle->log, 0, "worker cycle");
|
|
|
739
|
|
|
740 ngx_process_events(cycle);
|
|
|
741
|
|
|
742 if (ngx_terminate) {
|
|
|
743 ngx_log_error(NGX_LOG_INFO, cycle->log, 0, "exiting");
|
|
|
744
|
|
|
745 #if (NGX_THREADS)
|
|
|
746 ngx_wakeup_worker_threads(cycle);
|
|
|
747 #endif
|
|
|
748
|
|
|
749 /*
|
|
|
750 * we do not destroy cycle->pool here because a signal handler
|
|
|
751 * that uses cycle->log can be called at this point
|
|
|
752 */
|
|
|
753 exit(0);
|
|
|
754 }
|
|
|
755
|
|
|
756 if (ngx_quit) {
|
|
|
757 ngx_quit = 0;
|
|
|
758 ngx_log_error(NGX_LOG_INFO, cycle->log, 0,
|
|
|
759 "gracefully shutting down");
|
|
|
760 ngx_setproctitle("worker process is shutting down");
|
|
|
761
|
|
|
762 if (!ngx_exiting) {
|
|
|
763 ngx_close_listening_sockets(cycle);
|
|
|
764 ngx_exiting = 1;
|
|
|
765 }
|
|
|
766 }
|
|
|
767
|
|
|
768 if (ngx_reopen) {
|
|
|
769 ngx_reopen = 0;
|
|
|
770 ngx_log_error(NGX_LOG_INFO, cycle->log, 0, "reopen logs");
|
|
|
771 ngx_reopen_files(cycle, -1);
|
|
|
772 }
|
|
|
773 }
|
|
|
774 }
|
|
|
775
|
|
|
776
|
|
|
777 static void ngx_channel_handler(ngx_event_t *ev)
|
|
|
778 {
|
|
|
779 ngx_int_t n;
|
|
|
780 ngx_channel_t ch;
|
|
|
781 ngx_connection_t *c;
|
|
|
782
|
|
|
783 c = ev->data;
|
|
|
784
|
|
|
785 ngx_log_debug0(NGX_LOG_DEBUG_CORE, ev->log, 0, "channel handler");
|
|
|
786
|
|
|
787 n = ngx_read_channel(c->fd, &ch, sizeof(ngx_channel_t), ev->log);
|
|
|
788
|
|
|
789 ngx_log_debug1(NGX_LOG_DEBUG_CORE, ev->log, 0, "channel: %d", n);
|
|
|
790
|
|
|
791 if (n <= 0) {
|
|
|
792 return;
|
|
|
793 }
|
|
|
794
|
|
|
795 ngx_log_debug1(NGX_LOG_DEBUG_CORE, ev->log, 0,
|
|
|
796 "channel command: %d", ch.command);
|
|
|
797
|
|
|
798 switch (ch.command) {
|
|
|
799
|
|
|
800 case NGX_CMD_QUIT:
|
|
|
801 ngx_quit = 1;
|
|
|
802 break;
|
|
|
803
|
|
|
804 case NGX_CMD_TERMINATE:
|
|
|
805 ngx_terminate = 1;
|
|
|
806 break;
|
|
|
807
|
|
|
808 case NGX_CMD_REOPEN:
|
|
|
809 ngx_reopen = 1;
|
|
|
810 break;
|
|
|
811
|
|
|
812 case NGX_CMD_OPEN_CHANNEL:
|
|
|
813
|
|
|
814 ngx_log_debug3(NGX_LOG_DEBUG_CORE, ev->log, 0,
|
|
|
815 "get channel s:%d pid:" PID_T_FMT " fd:%d",
|
|
|
816 ch.slot, ch.pid, ch.fd);
|
|
|
817
|
|
|
818 ngx_processes[ch.slot].pid = ch.pid;
|
|
|
819 ngx_processes[ch.slot].channel[0] = ch.fd;
|
|
|
820 break;
|
|
|
821
|
|
|
822 case NGX_CMD_CLOSE_CHANNEL:
|
|
|
823
|
|
|
824 ngx_log_debug4(NGX_LOG_DEBUG_CORE, ev->log, 0,
|
|
|
825 "close channel s:%d pid:" PID_T_FMT " our:" PID_T_FMT
|
|
|
826 " fd:%d",
|
|
|
827 ch.slot, ch.pid, ngx_processes[ch.slot].pid,
|
|
|
828 ngx_processes[ch.slot].channel[0]);
|
|
|
829
|
|
|
830 if (close(ngx_processes[ch.slot].channel[0]) == -1) {
|
|
|
831 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno, "close() failed");
|
|
|
832 }
|
|
|
833
|
|
|
834 ngx_processes[ch.slot].channel[0] = -1;
|
|
|
835 break;
|
|
|
836 }
|
|
|
837 }
|
|
|
838
|
|
|
839
|
|
|
840 #if (NGX_THREADS)
|
|
|
841
|
|
|
842 static void ngx_wakeup_worker_threads(ngx_cycle_t *cycle)
|
|
|
843 {
|
|
|
844 ngx_int_t i;
|
|
|
845 ngx_uint_t live;
|
|
|
846
|
|
|
847 for ( ;; ) {
|
|
|
848
|
|
|
849 live = 0;
|
|
|
850
|
|
|
851 for (i = 0; i < ngx_threads_n; i++) {
|
|
|
852 if (ngx_threads[i].state < NGX_THREAD_EXIT) {
|
|
|
853 ngx_cond_signal(ngx_threads[i].cv);
|
|
|
854
|
|
|
855 if (ngx_threads[i].cv->tid == (ngx_tid_t) -1) {
|
|
|
856 ngx_threads[i].state = NGX_THREAD_DONE;
|
|
|
857 } else {
|
|
|
858 live = 1;
|
|
|
859 }
|
|
|
860 }
|
|
|
861
|
|
|
862 if (ngx_threads[i].state == NGX_THREAD_EXIT) {
|
|
|
863 ngx_thread_join(ngx_threads[i].tid, NULL);
|
|
|
864 ngx_threads[i].state = NGX_THREAD_DONE;
|
|
|
865 }
|
|
|
866 }
|
|
|
867
|
|
|
868 if (live == 0) {
|
|
|
869 ngx_log_debug0(NGX_LOG_DEBUG_CORE, cycle->log, 0,
|
|
|
870 "all worker threads are joined");
|
|
|
871
|
|
|
872 /* STUB */
|
|
|
873 ngx_done_events(cycle);
|
|
|
874 ngx_mutex_destroy(ngx_event_timer_mutex);
|
|
|
875 ngx_mutex_destroy(ngx_posted_events_mutex);
|
|
|
876
|
|
|
877 return;
|
|
|
878 }
|
|
|
879
|
|
|
880 ngx_sched_yield();
|
|
|
881 }
|
|
|
882 }
|
|
|
883
|
|
|
884
|
|
|
885 static void* ngx_worker_thread_cycle(void *data)
|
|
|
886 {
|
|
|
887 ngx_thread_t *thr = data;
|
|
|
888
|
|
|
889 sigset_t set;
|
|
|
890 ngx_err_t err;
|
|
|
891 ngx_core_tls_t *tls;
|
|
|
892 ngx_cycle_t *cycle;
|
|
|
893 struct timeval tv;
|
|
|
894
|
|
|
895 thr->cv->tid = ngx_thread_self();
|
|
|
896
|
|
|
897 cycle = (ngx_cycle_t *) ngx_cycle;
|
|
|
898
|
|
|
899 sigemptyset(&set);
|
|
|
900 sigaddset(&set, ngx_signal_value(NGX_RECONFIGURE_SIGNAL));
|
|
|
901 sigaddset(&set, ngx_signal_value(NGX_REOPEN_SIGNAL));
|
|
|
902 sigaddset(&set, ngx_signal_value(NGX_CHANGEBIN_SIGNAL));
|
|
|
903
|
|
|
904 err = ngx_thread_sigmask(SIG_BLOCK, &set, NULL);
|
|
|
905 if (err) {
|
|
|
906 ngx_log_error(NGX_LOG_ALERT, cycle->log, err,
|
|
|
907 ngx_thread_sigmask_n " failed");
|
|
|
908 return (void *) 1;
|
|
|
909 }
|
|
|
910
|
|
|
911 ngx_log_debug1(NGX_LOG_DEBUG_CORE, cycle->log, 0,
|
|
|
912 "thread " TID_T_FMT " started", ngx_thread_self());
|
|
|
913
|
|
|
914 ngx_setthrtitle("worker thread");
|
|
|
915
|
|
|
916 if (!(tls = ngx_calloc(sizeof(ngx_core_tls_t), cycle->log))) {
|
|
|
917 return (void *) 1;
|
|
|
918 }
|
|
|
919
|
|
|
920 err = ngx_thread_set_tls(ngx_core_tls_key, tls);
|
|
|
921 if (err != 0) {
|
|
|
922 ngx_log_error(NGX_LOG_ALERT, cycle->log, err,
|
|
|
923 ngx_thread_set_tls_n " failed");
|
|
|
924 return (void *) 1;
|
|
|
925 }
|
|
|
926
|
|
|
927 if (ngx_mutex_lock(ngx_posted_events_mutex) == NGX_ERROR) {
|
|
|
928 return (void *) 1;
|
|
|
929 }
|
|
|
930
|
|
|
931 for ( ;; ) {
|
|
|
932 thr->state = NGX_THREAD_FREE;
|
|
|
933
|
|
|
934 if (ngx_cond_wait(thr->cv, ngx_posted_events_mutex) == NGX_ERROR) {
|
|
|
935 return (void *) 1;
|
|
|
936 }
|
|
|
937
|
|
|
938 if (ngx_terminate) {
|
|
|
939 thr->state = NGX_THREAD_EXIT;
|
|
|
940
|
|
|
941 ngx_mutex_unlock(ngx_posted_events_mutex);
|
|
|
942
|
|
|
943 ngx_log_debug1(NGX_LOG_DEBUG_CORE, cycle->log, 0,
|
|
|
944 "thread %d is done", ngx_thread_self());
|
|
|
945
|
|
|
946 return (void *) 0;
|
|
|
947 }
|
|
|
948
|
|
|
949 thr->state = NGX_THREAD_BUSY;
|
|
|
950
|
|
|
951 if (ngx_event_thread_process_posted(cycle) == NGX_ERROR) {
|
|
|
952 return (void *) 1;
|
|
|
953 }
|
|
|
954
|
|
|
955 if (ngx_event_thread_process_posted(cycle) == NGX_ERROR) {
|
|
|
956 return (void *) 1;
|
|
|
957 }
|
|
|
958
|
|
|
959 if (ngx_process_changes) {
|
|
|
960 if (ngx_process_changes(cycle, 1) == NGX_ERROR) {
|
|
|
961 return (void *) 1;
|
|
|
962 }
|
|
|
963 }
|
|
|
964 }
|
|
|
965 }
|
|
|
966
|
|
|
967 #endif
|
