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236
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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
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11
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12 #if (NGX_TEST_BUILD_EVENTPORT)
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13
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14 #define ushort_t u_short
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15 #define uint_t u_int
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16
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17 /* Solaris declarations */
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18
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19 #define PORT_SOURCE_AIO 1
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20 #define PORT_SOURCE_TIMER 2
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21 #define PORT_SOURCE_USER 3
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22 #define PORT_SOURCE_FD 4
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23 #define PORT_SOURCE_ALERT 5
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24 #define PORT_SOURCE_MQ 6
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25
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26 #define ETIME 64
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27
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28 #define SIGEV_PORT 4
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29
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30 typedef struct {
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31 int portev_events; /* event data is source specific */
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32 ushort_t portev_source; /* event source */
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33 ushort_t portev_pad; /* port internal use */
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34 uintptr_t portev_object; /* source specific object */
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35 void *portev_user; /* user cookie */
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36 } port_event_t;
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37
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38 typedef struct port_notify {
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39 int portnfy_port; /* bind request(s) to port */
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40 void *portnfy_user; /* user defined */
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41 } port_notify_t;
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42
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43 int port_create(void)
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44 {
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45 return -1;
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46 }
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47
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48 int port_associate(int port, int source, uintptr_t object, int events,
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49 void *user)
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50 {
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51 return -1;
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52 }
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53
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54 int port_dissociate(int port, int source, uintptr_t object)
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55 {
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56 return -1;
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57 }
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58
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59 int port_getn(int port, port_event_t list[], uint_t max, uint_t *nget,
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60 struct timespec *timeout)
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61 {
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62 return -1;
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63 }
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64
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65 int timer_create(clockid_t clock_id, struct sigevent *evp, timer_t *timerid)
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66 {
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67 return -1;
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68 }
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69
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70 int timer_settime(timer_t timerid, int flags, const struct itimerspec *value,
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71 struct itimerspec *ovalue)
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72 {
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73 return -1;
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74 }
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75
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76 int timer_delete(timer_t timerid)
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77 {
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78 return -1;
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79 }
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80
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81 #endif
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82
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83
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84 typedef struct {
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324
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85 ngx_uint_t events;
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236
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86 } ngx_eventport_conf_t;
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87
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88
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89 static ngx_int_t ngx_eventport_init(ngx_cycle_t *cycle, ngx_msec_t timer);
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90 static void ngx_eventport_done(ngx_cycle_t *cycle);
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324
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91 static ngx_int_t ngx_eventport_add_event(ngx_event_t *ev, ngx_int_t event,
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92 ngx_uint_t flags);
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93 static ngx_int_t ngx_eventport_del_event(ngx_event_t *ev, ngx_int_t event,
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94 ngx_uint_t flags);
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236
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95 static ngx_int_t ngx_eventport_process_events(ngx_cycle_t *cycle,
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96 ngx_msec_t timer, ngx_uint_t flags);
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97
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98 static void *ngx_eventport_create_conf(ngx_cycle_t *cycle);
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99 static char *ngx_eventport_init_conf(ngx_cycle_t *cycle, void *conf);
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100
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101 static int ep = -1;
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102 static port_event_t *event_list;
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324
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103 static ngx_uint_t nevents;
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364
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104 static timer_t event_timer = (timer_t) -1;
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236
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105
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106 static ngx_str_t eventport_name = ngx_string("eventport");
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107
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108
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109 static ngx_command_t ngx_eventport_commands[] = {
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110
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111 { ngx_string("eventport_events"),
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112 NGX_EVENT_CONF|NGX_CONF_TAKE1,
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113 ngx_conf_set_num_slot,
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114 0,
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115 offsetof(ngx_eventport_conf_t, events),
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116 NULL },
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117
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118 ngx_null_command
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119 };
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120
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121
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122 ngx_event_module_t ngx_eventport_module_ctx = {
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123 &eventport_name,
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124 ngx_eventport_create_conf, /* create configuration */
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125 ngx_eventport_init_conf, /* init configuration */
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126
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127 {
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128 ngx_eventport_add_event, /* add an event */
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129 ngx_eventport_del_event, /* delete an event */
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130 ngx_eventport_add_event, /* enable an event */
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131 ngx_eventport_del_event, /* disable an event */
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132 NULL, /* add an connection */
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133 NULL, /* delete an connection */
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134 NULL, /* process the changes */
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135 ngx_eventport_process_events, /* process the events */
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136 ngx_eventport_init, /* init the events */
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137 ngx_eventport_done, /* done the events */
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138 }
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139
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140 };
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141
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142 ngx_module_t ngx_eventport_module = {
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143 NGX_MODULE_V1,
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144 &ngx_eventport_module_ctx, /* module context */
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145 ngx_eventport_commands, /* module directives */
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146 NGX_EVENT_MODULE, /* module type */
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147 NULL, /* init master */
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148 NULL, /* init module */
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149 NULL, /* init process */
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150 NULL, /* init thread */
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151 NULL, /* exit thread */
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152 NULL, /* exit process */
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153 NULL, /* exit master */
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154 NGX_MODULE_V1_PADDING
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155 };
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156
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157
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158 static ngx_int_t
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159 ngx_eventport_init(ngx_cycle_t *cycle, ngx_msec_t timer)
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160 {
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161 port_notify_t pn;
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162 struct itimerspec its;
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163 struct sigevent sev;
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164 ngx_eventport_conf_t *epcf;
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165
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166 epcf = ngx_event_get_conf(cycle->conf_ctx, ngx_eventport_module);
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167
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168 if (ep == -1) {
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169 ep = port_create();
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170
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171 if (ep == -1) {
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172 ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
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173 "port_create() failed");
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174 return NGX_ERROR;
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175 }
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176 }
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177
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178 if (nevents < epcf->events) {
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179 if (event_list) {
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180 ngx_free(event_list);
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181 }
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182
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183 event_list = ngx_alloc(sizeof(port_event_t) * epcf->events,
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184 cycle->log);
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185 if (event_list == NULL) {
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186 return NGX_ERROR;
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187 }
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188 }
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189
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190 ngx_event_flags = NGX_USE_EVENTPORT_EVENT;
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191
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192 if (timer) {
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193 ngx_memzero(&pn, sizeof(port_notify_t));
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194 pn.portnfy_port = ep;
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195
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196 ngx_memzero(&sev, sizeof(struct sigevent));
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197 sev.sigev_notify = SIGEV_PORT;
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198 #if !(NGX_TEST_BUILD_EVENTPORT)
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199 sev.sigev_value.sival_ptr = &pn;
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200 #endif
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201
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202 if (timer_create(CLOCK_REALTIME, &sev, &event_timer) == -1) {
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203 ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
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204 "timer_create() failed");
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205 return NGX_ERROR;
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206 }
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207
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208 its.it_interval.tv_sec = timer / 1000;
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209 its.it_interval.tv_nsec = (timer % 1000) * 1000000;
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210 its.it_value.tv_sec = timer / 1000;
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211 its.it_value.tv_nsec = (timer % 1000) * 1000000;
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212
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213 if (timer_settime(event_timer, 0, &its, NULL) == -1) {
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214 ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
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215 "timer_settime() failed");
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216 return NGX_ERROR;
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217 }
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218
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219 ngx_event_flags |= NGX_USE_TIMER_EVENT;
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220 }
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221
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222 nevents = epcf->events;
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223
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224 ngx_io = ngx_os_io;
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225
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226 ngx_event_actions = ngx_eventport_module_ctx.actions;
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227
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228 return NGX_OK;
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229 }
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230
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231
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232 static void
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233 ngx_eventport_done(ngx_cycle_t *cycle)
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234 {
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364
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235 if (event_timer != (timer_t) -1) {
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236
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236 if (timer_delete(event_timer) == -1) {
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237 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
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238 "timer_delete() failed");
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239 }
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240
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364
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241 event_timer = (timer_t) -1;
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236
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242 }
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243
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244 if (close(ep) == -1) {
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245 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
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246 "close() event port failed");
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247 }
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248
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249 ep = -1;
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250
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251 ngx_free(event_list);
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252
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253 event_list = NULL;
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254 nevents = 0;
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255 }
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256
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257
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258 static ngx_int_t
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324
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259 ngx_eventport_add_event(ngx_event_t *ev, ngx_int_t event, ngx_uint_t flags)
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236
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260 {
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324
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261 ngx_int_t events, prev;
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236
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262 ngx_event_t *e;
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263 ngx_connection_t *c;
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264
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265 c = ev->data;
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266
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267 events = event;
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268
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269 if (event == NGX_READ_EVENT) {
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270 e = c->write;
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271 prev = POLLOUT;
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272 #if (NGX_READ_EVENT != POLLIN)
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273 events = POLLIN;
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274 #endif
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275
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276 } else {
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277 e = c->read;
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278 prev = POLLIN;
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279 #if (NGX_WRITE_EVENT != POLLOUT)
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280 events = POLLOUT;
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281 #endif
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282 }
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283
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284 if (e->oneshot) {
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285 events |= prev;
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286 }
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287
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288 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, ev->log, 0,
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324
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289 "eventport add event: fd:%d ev:%04Xi", c->fd, events);
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236
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290
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291 if (port_associate(ep, PORT_SOURCE_FD, c->fd, events,
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292 (void *) ((uintptr_t) ev | ev->instance))
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293 == -1)
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294 {
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295 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno,
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296 "port_associate() failed");
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297 return NGX_ERROR;
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298 }
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299
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300 ev->active = 1;
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301 ev->oneshot = 1;
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302
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303 return NGX_OK;
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304 }
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305
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306
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307 static ngx_int_t
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324
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308 ngx_eventport_del_event(ngx_event_t *ev, ngx_int_t event, ngx_uint_t flags)
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236
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309 {
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310 ngx_event_t *e;
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311 ngx_connection_t *c;
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312
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313 /*
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314 * when the file descriptor is closed, the event port automatically
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315 * dissociates it from the port, so we do not need to dissociate explicity
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316 * the event before the closing the file descriptor
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317 */
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318
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319 if (flags & NGX_CLOSE_EVENT) {
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320 ev->active = 0;
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321 ev->oneshot = 0;
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322 return NGX_OK;
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323 }
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324
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325 c = ev->data;
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326
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327 if (event == NGX_READ_EVENT) {
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328 e = c->write;
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329 event = POLLOUT;
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330
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331 } else {
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332 e = c->read;
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333 event = POLLIN;
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334 }
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335
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336 if (e->oneshot) {
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337 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, ev->log, 0,
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324
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338 "eventport change event: fd:%d ev:%04Xi", c->fd, event);
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236
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339
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340 if (port_associate(ep, PORT_SOURCE_FD, c->fd, event,
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341 (void *) ((uintptr_t) ev | ev->instance))
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342 == -1)
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343 {
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344 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno,
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345 "port_associate() failed");
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346 return NGX_ERROR;
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347 }
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348
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349 } else {
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350 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, ev->log, 0,
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351 "eventport del event: fd:%d", c->fd);
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352
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353 if (port_dissociate(ep, PORT_SOURCE_FD, c->fd) == -1) {
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354 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno,
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355 "port_dissociate() failed");
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356 return NGX_ERROR;
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357 }
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358 }
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359
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360 ev->active = 0;
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361 ev->oneshot = 0;
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362
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363 return NGX_OK;
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364 }
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365
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366
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367 ngx_int_t
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368 ngx_eventport_process_events(ngx_cycle_t *cycle, ngx_msec_t timer,
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369 ngx_uint_t flags)
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370 {
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371 int n, revents;
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372 u_int events;
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373 ngx_err_t err;
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374 ngx_int_t instance;
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375 ngx_uint_t i, level;
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376 ngx_event_t *ev, *rev, *wev, **queue;
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377 ngx_connection_t *c;
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378 struct timespec ts, *tp;
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379
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380 if (timer == NGX_TIMER_INFINITE) {
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381 tp = NULL;
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382
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383 } else {
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384 ts.tv_sec = timer / 1000;
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385 ts.tv_nsec = (timer % 1000) * 1000000;
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386 tp = &ts;
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387 }
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388
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389 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
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390 "eventport timer: %M", timer);
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391
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392 events = 1;
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393
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324
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394 n = port_getn(ep, event_list, (u_int) nevents, &events, tp);
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236
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395
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396 err = ngx_errno;
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397
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398 if (flags & NGX_UPDATE_TIME) {
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399 ngx_time_update(0, 0);
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400 }
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401
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402 if (n == -1) {
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403 if (err == ETIME) {
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404 if (timer != NGX_TIMER_INFINITE) {
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405 return NGX_OK;
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406 }
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407
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408 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
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409 "port_getn() returned no events without timeout");
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410 return NGX_ERROR;
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411 }
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412
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413 level = (err == NGX_EINTR) ? NGX_LOG_INFO : NGX_LOG_ALERT;
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414 ngx_log_error(level, cycle->log, err, "port_getn() failed");
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415 return NGX_ERROR;
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416 }
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417
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418 if (events == 0) {
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419 if (timer != NGX_TIMER_INFINITE) {
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420 return NGX_OK;
|
|
|
421 }
|
|
|
422
|
|
|
423 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
|
|
|
424 "port_getn() returned no events without timeout");
|
|
|
425 return NGX_ERROR;
|
|
|
426 }
|
|
|
427
|
|
|
428 ngx_mutex_lock(ngx_posted_events_mutex);
|
|
|
429
|
|
|
430 for (i = 0; i < events; i++) {
|
|
|
431
|
|
|
432 if (event_list[i].portev_source == PORT_SOURCE_TIMER) {
|
|
|
433 ngx_time_update(0, 0);
|
|
|
434 continue;
|
|
|
435 }
|
|
|
436
|
|
|
437 ev = event_list[i].portev_user;
|
|
|
438
|
|
|
439 switch (event_list[i].portev_source) {
|
|
|
440
|
|
|
441 case PORT_SOURCE_FD:
|
|
|
442
|
|
|
443 instance = (uintptr_t) ev & 1;
|
|
|
444 ev = (ngx_event_t *) ((uintptr_t) ev & (uintptr_t) ~1);
|
|
|
445
|
|
|
446 if (ev->closed || ev->instance != instance) {
|
|
|
447
|
|
|
448 /*
|
|
|
449 * the stale event from a file descriptor
|
|
|
450 * that was just closed in this iteration
|
|
|
451 */
|
|
|
452
|
|
|
453 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
|
|
|
454 "eventport: stale event %p", ev);
|
|
|
455 continue;
|
|
|
456 }
|
|
|
457
|
|
|
458 revents = event_list[i].portev_events;
|
|
|
459
|
|
|
460 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
|
|
|
461 "eventport: fd:%d, ev:%04Xd",
|
|
|
462 event_list[i].portev_object, revents);
|
|
|
463
|
|
|
464 if (revents & (POLLERR|POLLHUP|POLLNVAL)) {
|
|
290
|
465 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
|
|
|
466 "port_getn() error fd:%d ev:%04Xd",
|
|
|
467 event_list[i].portev_object, revents);
|
|
236
|
468 }
|
|
|
469
|
|
|
470 if (revents & ~(POLLIN|POLLOUT|POLLERR|POLLHUP|POLLNVAL)) {
|
|
|
471 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
|
|
|
472 "strange port_getn() events fd:%d ev:%04Xd",
|
|
|
473 event_list[i].portev_object, revents);
|
|
|
474 }
|
|
|
475
|
|
|
476 if ((revents & (POLLERR|POLLHUP|POLLNVAL))
|
|
|
477 && (revents & (POLLIN|POLLOUT)) == 0)
|
|
|
478 {
|
|
|
479 /*
|
|
|
480 * if the error events were returned without POLLIN or POLLOUT,
|
|
|
481 * then add these flags to handle the events at least in one
|
|
|
482 * active handler
|
|
|
483 */
|
|
|
484
|
|
|
485 revents |= POLLIN|POLLOUT;
|
|
|
486 }
|
|
|
487
|
|
|
488 c = ev->data;
|
|
|
489 rev = c->read;
|
|
|
490 wev = c->write;
|
|
|
491
|
|
|
492 rev->active = 0;
|
|
|
493 wev->active = 0;
|
|
|
494
|
|
|
495 if (revents & POLLIN) {
|
|
244
|
496
|
|
236
|
497 if ((flags & NGX_POST_THREAD_EVENTS) && !rev->accept) {
|
|
|
498 rev->posted_ready = 1;
|
|
|
499
|
|
|
500 } else {
|
|
|
501 rev->ready = 1;
|
|
|
502 }
|
|
|
503
|
|
|
504 if (flags & NGX_POST_EVENTS) {
|
|
|
505 queue = (ngx_event_t **) (rev->accept ?
|
|
|
506 &ngx_posted_accept_events : &ngx_posted_events);
|
|
|
507
|
|
|
508 ngx_locked_post_event(rev, queue);
|
|
|
509
|
|
|
510 } else {
|
|
|
511 rev->handler(rev);
|
|
318
|
512
|
|
|
513 if (ev->closed) {
|
|
|
514 continue;
|
|
|
515 }
|
|
236
|
516 }
|
|
|
517
|
|
|
518 if (rev->accept) {
|
|
|
519 if (ngx_use_accept_mutex) {
|
|
|
520 ngx_accept_events = 1;
|
|
|
521 continue;
|
|
|
522 }
|
|
|
523
|
|
|
524 if (port_associate(ep, PORT_SOURCE_FD, c->fd, POLLIN,
|
|
|
525 (void *) ((uintptr_t) ev | ev->instance))
|
|
|
526 == -1)
|
|
|
527 {
|
|
|
528 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno,
|
|
|
529 "port_associate() failed");
|
|
|
530 return NGX_ERROR;
|
|
|
531 }
|
|
|
532 }
|
|
|
533 }
|
|
|
534
|
|
|
535 if (revents & POLLOUT) {
|
|
|
536
|
|
|
537 if (flags & NGX_POST_THREAD_EVENTS) {
|
|
|
538 wev->posted_ready = 1;
|
|
|
539
|
|
|
540 } else {
|
|
|
541 wev->ready = 1;
|
|
|
542 }
|
|
|
543
|
|
|
544 if (flags & NGX_POST_EVENTS) {
|
|
|
545 ngx_locked_post_event(wev, &ngx_posted_events);
|
|
|
546
|
|
|
547 } else {
|
|
|
548 wev->handler(wev);
|
|
|
549 }
|
|
|
550 }
|
|
|
551
|
|
|
552 continue;
|
|
|
553
|
|
|
554 default:
|
|
|
555 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
|
|
|
556 "unexpected even_port object %d",
|
|
|
557 event_list[i].portev_object);
|
|
|
558 continue;
|
|
|
559 }
|
|
|
560 }
|
|
|
561
|
|
|
562 ngx_mutex_unlock(ngx_posted_events_mutex);
|
|
|
563
|
|
|
564 return NGX_OK;
|
|
|
565 }
|
|
|
566
|
|
|
567
|
|
|
568 static void *
|
|
|
569 ngx_eventport_create_conf(ngx_cycle_t *cycle)
|
|
|
570 {
|
|
|
571 ngx_eventport_conf_t *epcf;
|
|
|
572
|
|
|
573 epcf = ngx_palloc(cycle->pool, sizeof(ngx_eventport_conf_t));
|
|
|
574 if (epcf == NULL) {
|
|
|
575 return NGX_CONF_ERROR;
|
|
|
576 }
|
|
|
577
|
|
|
578 epcf->events = NGX_CONF_UNSET;
|
|
|
579
|
|
|
580 return epcf;
|
|
|
581 }
|
|
|
582
|
|
|
583
|
|
|
584 static char *
|
|
|
585 ngx_eventport_init_conf(ngx_cycle_t *cycle, void *conf)
|
|
|
586 {
|
|
|
587 ngx_eventport_conf_t *epcf = conf;
|
|
|
588
|
|
|
589 ngx_conf_init_uint_value(epcf->events, 32);
|
|
|
590
|
|
|
591 return NGX_CONF_OK;
|
|
|
592 }
|
