236
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1
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2 /*
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3 * Copyright (C) Igor Sysoev
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644
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4 * Copyright (C) Nginx, Inc.
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236
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5 */
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6
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7
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8 #include <ngx_config.h>
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9 #include <ngx_core.h>
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10 #include <ngx_event.h>
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11
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12
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13 #if (NGX_TEST_BUILD_EVENTPORT)
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14
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15 #define ushort_t u_short
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16 #define uint_t u_int
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17
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18 /* Solaris declarations */
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19
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20 #define PORT_SOURCE_AIO 1
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21 #define PORT_SOURCE_TIMER 2
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22 #define PORT_SOURCE_USER 3
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23 #define PORT_SOURCE_FD 4
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24 #define PORT_SOURCE_ALERT 5
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25 #define PORT_SOURCE_MQ 6
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26
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27 #define ETIME 64
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28
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29 #define SIGEV_PORT 4
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30
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31 typedef struct {
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32 int portev_events; /* event data is source specific */
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33 ushort_t portev_source; /* event source */
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34 ushort_t portev_pad; /* port internal use */
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35 uintptr_t portev_object; /* source specific object */
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36 void *portev_user; /* user cookie */
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37 } port_event_t;
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38
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39 typedef struct port_notify {
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40 int portnfy_port; /* bind request(s) to port */
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41 void *portnfy_user; /* user defined */
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42 } port_notify_t;
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43
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370
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44 #if (__FreeBSD_version < 700005)
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45
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46 typedef struct itimerspec { /* definition per POSIX.4 */
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47 struct timespec it_interval;/* timer period */
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48 struct timespec it_value; /* timer expiration */
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49 } itimerspec_t;
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50
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51 #endif
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52
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236
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53 int port_create(void)
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54 {
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55 return -1;
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56 }
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57
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58 int port_associate(int port, int source, uintptr_t object, int events,
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59 void *user)
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60 {
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61 return -1;
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62 }
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63
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64 int port_dissociate(int port, int source, uintptr_t object)
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65 {
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66 return -1;
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67 }
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68
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69 int port_getn(int port, port_event_t list[], uint_t max, uint_t *nget,
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70 struct timespec *timeout)
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71 {
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72 return -1;
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73 }
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74
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75 int timer_create(clockid_t clock_id, struct sigevent *evp, timer_t *timerid)
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76 {
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77 return -1;
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78 }
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79
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80 int timer_settime(timer_t timerid, int flags, const struct itimerspec *value,
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81 struct itimerspec *ovalue)
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82 {
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83 return -1;
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84 }
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85
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86 int timer_delete(timer_t timerid)
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87 {
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88 return -1;
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89 }
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90
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91 #endif
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92
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93
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94 typedef struct {
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324
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95 ngx_uint_t events;
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236
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96 } ngx_eventport_conf_t;
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97
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98
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99 static ngx_int_t ngx_eventport_init(ngx_cycle_t *cycle, ngx_msec_t timer);
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100 static void ngx_eventport_done(ngx_cycle_t *cycle);
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324
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101 static ngx_int_t ngx_eventport_add_event(ngx_event_t *ev, ngx_int_t event,
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102 ngx_uint_t flags);
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103 static ngx_int_t ngx_eventport_del_event(ngx_event_t *ev, ngx_int_t event,
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104 ngx_uint_t flags);
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236
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105 static ngx_int_t ngx_eventport_process_events(ngx_cycle_t *cycle,
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106 ngx_msec_t timer, ngx_uint_t flags);
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107
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108 static void *ngx_eventport_create_conf(ngx_cycle_t *cycle);
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109 static char *ngx_eventport_init_conf(ngx_cycle_t *cycle, void *conf);
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110
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111 static int ep = -1;
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112 static port_event_t *event_list;
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324
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113 static ngx_uint_t nevents;
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364
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114 static timer_t event_timer = (timer_t) -1;
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236
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115
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116 static ngx_str_t eventport_name = ngx_string("eventport");
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117
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118
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119 static ngx_command_t ngx_eventport_commands[] = {
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120
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121 { ngx_string("eventport_events"),
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122 NGX_EVENT_CONF|NGX_CONF_TAKE1,
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123 ngx_conf_set_num_slot,
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124 0,
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125 offsetof(ngx_eventport_conf_t, events),
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126 NULL },
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127
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128 ngx_null_command
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129 };
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130
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131
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132 ngx_event_module_t ngx_eventport_module_ctx = {
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133 &eventport_name,
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134 ngx_eventport_create_conf, /* create configuration */
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135 ngx_eventport_init_conf, /* init configuration */
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136
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137 {
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138 ngx_eventport_add_event, /* add an event */
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139 ngx_eventport_del_event, /* delete an event */
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140 ngx_eventport_add_event, /* enable an event */
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141 ngx_eventport_del_event, /* disable an event */
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142 NULL, /* add an connection */
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143 NULL, /* delete an connection */
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144 NULL, /* process the changes */
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145 ngx_eventport_process_events, /* process the events */
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146 ngx_eventport_init, /* init the events */
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147 ngx_eventport_done, /* done the events */
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148 }
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149
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150 };
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151
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152 ngx_module_t ngx_eventport_module = {
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153 NGX_MODULE_V1,
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154 &ngx_eventport_module_ctx, /* module context */
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155 ngx_eventport_commands, /* module directives */
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156 NGX_EVENT_MODULE, /* module type */
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157 NULL, /* init master */
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158 NULL, /* init module */
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159 NULL, /* init process */
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160 NULL, /* init thread */
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161 NULL, /* exit thread */
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162 NULL, /* exit process */
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163 NULL, /* exit master */
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164 NGX_MODULE_V1_PADDING
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165 };
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166
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167
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168 static ngx_int_t
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169 ngx_eventport_init(ngx_cycle_t *cycle, ngx_msec_t timer)
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170 {
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171 port_notify_t pn;
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172 struct itimerspec its;
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173 struct sigevent sev;
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174 ngx_eventport_conf_t *epcf;
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175
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176 epcf = ngx_event_get_conf(cycle->conf_ctx, ngx_eventport_module);
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177
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178 if (ep == -1) {
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179 ep = port_create();
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180
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181 if (ep == -1) {
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182 ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
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183 "port_create() failed");
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184 return NGX_ERROR;
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185 }
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186 }
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187
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188 if (nevents < epcf->events) {
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189 if (event_list) {
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190 ngx_free(event_list);
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191 }
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192
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193 event_list = ngx_alloc(sizeof(port_event_t) * epcf->events,
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194 cycle->log);
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195 if (event_list == NULL) {
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196 return NGX_ERROR;
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197 }
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198 }
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199
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200 ngx_event_flags = NGX_USE_EVENTPORT_EVENT;
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201
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202 if (timer) {
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203 ngx_memzero(&pn, sizeof(port_notify_t));
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204 pn.portnfy_port = ep;
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205
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206 ngx_memzero(&sev, sizeof(struct sigevent));
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207 sev.sigev_notify = SIGEV_PORT;
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208 #if !(NGX_TEST_BUILD_EVENTPORT)
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209 sev.sigev_value.sival_ptr = &pn;
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210 #endif
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211
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212 if (timer_create(CLOCK_REALTIME, &sev, &event_timer) == -1) {
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213 ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
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214 "timer_create() failed");
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215 return NGX_ERROR;
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216 }
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217
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218 its.it_interval.tv_sec = timer / 1000;
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219 its.it_interval.tv_nsec = (timer % 1000) * 1000000;
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220 its.it_value.tv_sec = timer / 1000;
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221 its.it_value.tv_nsec = (timer % 1000) * 1000000;
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222
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223 if (timer_settime(event_timer, 0, &its, NULL) == -1) {
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224 ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
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225 "timer_settime() failed");
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226 return NGX_ERROR;
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227 }
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228
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229 ngx_event_flags |= NGX_USE_TIMER_EVENT;
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230 }
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231
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232 nevents = epcf->events;
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233
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234 ngx_io = ngx_os_io;
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235
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236 ngx_event_actions = ngx_eventport_module_ctx.actions;
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237
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238 return NGX_OK;
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239 }
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240
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241
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242 static void
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243 ngx_eventport_done(ngx_cycle_t *cycle)
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244 {
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364
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245 if (event_timer != (timer_t) -1) {
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236
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246 if (timer_delete(event_timer) == -1) {
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247 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
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248 "timer_delete() failed");
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249 }
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250
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364
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251 event_timer = (timer_t) -1;
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236
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252 }
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253
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254 if (close(ep) == -1) {
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255 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
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256 "close() event port failed");
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257 }
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258
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259 ep = -1;
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260
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261 ngx_free(event_list);
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262
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263 event_list = NULL;
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264 nevents = 0;
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265 }
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266
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267
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268 static ngx_int_t
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324
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269 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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270 {
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324
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271 ngx_int_t events, prev;
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272 ngx_event_t *e;
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273 ngx_connection_t *c;
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274
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275 c = ev->data;
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276
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277 events = event;
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278
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279 if (event == NGX_READ_EVENT) {
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280 e = c->write;
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281 prev = POLLOUT;
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282 #if (NGX_READ_EVENT != POLLIN)
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283 events = POLLIN;
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284 #endif
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285
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286 } else {
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287 e = c->read;
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288 prev = POLLIN;
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289 #if (NGX_WRITE_EVENT != POLLOUT)
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290 events = POLLOUT;
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291 #endif
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292 }
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293
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294 if (e->oneshot) {
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295 events |= prev;
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296 }
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297
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298 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, ev->log, 0,
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324
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299 "eventport add event: fd:%d ev:%04Xi", c->fd, events);
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300
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301 if (port_associate(ep, PORT_SOURCE_FD, c->fd, events,
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302 (void *) ((uintptr_t) ev | ev->instance))
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303 == -1)
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304 {
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305 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno,
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306 "port_associate() failed");
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307 return NGX_ERROR;
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308 }
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309
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310 ev->active = 1;
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311 ev->oneshot = 1;
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312
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313 return NGX_OK;
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314 }
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315
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316
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317 static ngx_int_t
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324
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318 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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319 {
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320 ngx_event_t *e;
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321 ngx_connection_t *c;
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322
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323 /*
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324 * when the file descriptor is closed, the event port automatically
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325 * dissociates it from the port, so we do not need to dissociate explicity
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326 * the event before the closing the file descriptor
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327 */
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328
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329 if (flags & NGX_CLOSE_EVENT) {
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330 ev->active = 0;
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331 ev->oneshot = 0;
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332 return NGX_OK;
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333 }
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334
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335 c = ev->data;
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336
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337 if (event == NGX_READ_EVENT) {
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338 e = c->write;
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339 event = POLLOUT;
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340
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341 } else {
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342 e = c->read;
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343 event = POLLIN;
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344 }
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345
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346 if (e->oneshot) {
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347 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, ev->log, 0,
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324
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348 "eventport change event: fd:%d ev:%04Xi", c->fd, event);
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236
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349
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350 if (port_associate(ep, PORT_SOURCE_FD, c->fd, event,
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351 (void *) ((uintptr_t) ev | ev->instance))
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352 == -1)
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353 {
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354 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno,
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355 "port_associate() failed");
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356 return NGX_ERROR;
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357 }
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358
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359 } else {
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360 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, ev->log, 0,
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361 "eventport del event: fd:%d", c->fd);
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362
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363 if (port_dissociate(ep, PORT_SOURCE_FD, c->fd) == -1) {
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364 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno,
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365 "port_dissociate() failed");
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366 return NGX_ERROR;
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367 }
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368 }
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369
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370 ev->active = 0;
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371 ev->oneshot = 0;
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372
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373 return NGX_OK;
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374 }
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375
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376
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377 ngx_int_t
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378 ngx_eventport_process_events(ngx_cycle_t *cycle, ngx_msec_t timer,
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379 ngx_uint_t flags)
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380 {
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381 int n, revents;
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382 u_int events;
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383 ngx_err_t err;
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384 ngx_int_t instance;
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385 ngx_uint_t i, level;
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386 ngx_event_t *ev, *rev, *wev, **queue;
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387 ngx_connection_t *c;
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388 struct timespec ts, *tp;
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389
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390 if (timer == NGX_TIMER_INFINITE) {
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391 tp = NULL;
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392
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393 } else {
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394 ts.tv_sec = timer / 1000;
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395 ts.tv_nsec = (timer % 1000) * 1000000;
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396 tp = &ts;
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397 }
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398
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399 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
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400 "eventport timer: %M", timer);
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401
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402 events = 1;
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403
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324
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404 n = port_getn(ep, event_list, (u_int) nevents, &events, tp);
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236
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405
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406 err = ngx_errno;
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407
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408 if (flags & NGX_UPDATE_TIME) {
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566
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409 ngx_time_update();
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236
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410 }
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411
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412 if (n == -1) {
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413 if (err == ETIME) {
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414 if (timer != NGX_TIMER_INFINITE) {
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415 return NGX_OK;
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416 }
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417
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418 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
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419 "port_getn() returned no events without timeout");
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420 return NGX_ERROR;
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421 }
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422
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423 level = (err == NGX_EINTR) ? NGX_LOG_INFO : NGX_LOG_ALERT;
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424 ngx_log_error(level, cycle->log, err, "port_getn() failed");
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425 return NGX_ERROR;
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426 }
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427
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428 if (events == 0) {
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429 if (timer != NGX_TIMER_INFINITE) {
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430 return NGX_OK;
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431 }
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432
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433 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
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434 "port_getn() returned no events without timeout");
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435 return NGX_ERROR;
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436 }
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437
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438 ngx_mutex_lock(ngx_posted_events_mutex);
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439
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440 for (i = 0; i < events; i++) {
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441
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442 if (event_list[i].portev_source == PORT_SOURCE_TIMER) {
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566
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443 ngx_time_update();
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236
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444 continue;
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445 }
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446
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447 ev = event_list[i].portev_user;
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448
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449 switch (event_list[i].portev_source) {
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450
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451 case PORT_SOURCE_FD:
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452
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453 instance = (uintptr_t) ev & 1;
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454 ev = (ngx_event_t *) ((uintptr_t) ev & (uintptr_t) ~1);
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455
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456 if (ev->closed || ev->instance != instance) {
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457
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458 /*
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459 * the stale event from a file descriptor
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460 * that was just closed in this iteration
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461 */
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462
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463 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
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464 "eventport: stale event %p", ev);
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465 continue;
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466 }
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467
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468 revents = event_list[i].portev_events;
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469
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470 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
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471 "eventport: fd:%d, ev:%04Xd",
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472 event_list[i].portev_object, revents);
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473
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474 if (revents & (POLLERR|POLLHUP|POLLNVAL)) {
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290
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475 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
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476 "port_getn() error fd:%d ev:%04Xd",
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477 event_list[i].portev_object, revents);
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236
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478 }
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479
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480 if (revents & ~(POLLIN|POLLOUT|POLLERR|POLLHUP|POLLNVAL)) {
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481 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
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482 "strange port_getn() events fd:%d ev:%04Xd",
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483 event_list[i].portev_object, revents);
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484 }
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485
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486 if ((revents & (POLLERR|POLLHUP|POLLNVAL))
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487 && (revents & (POLLIN|POLLOUT)) == 0)
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488 {
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489 /*
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490 * if the error events were returned without POLLIN or POLLOUT,
|
|
491 * then add these flags to handle the events at least in one
|
|
492 * active handler
|
|
493 */
|
|
494
|
|
495 revents |= POLLIN|POLLOUT;
|
|
496 }
|
|
497
|
|
498 c = ev->data;
|
|
499 rev = c->read;
|
|
500 wev = c->write;
|
|
501
|
|
502 rev->active = 0;
|
|
503 wev->active = 0;
|
|
504
|
|
505 if (revents & POLLIN) {
|
244
|
506
|
236
|
507 if ((flags & NGX_POST_THREAD_EVENTS) && !rev->accept) {
|
|
508 rev->posted_ready = 1;
|
|
509
|
|
510 } else {
|
|
511 rev->ready = 1;
|
|
512 }
|
|
513
|
|
514 if (flags & NGX_POST_EVENTS) {
|
|
515 queue = (ngx_event_t **) (rev->accept ?
|
|
516 &ngx_posted_accept_events : &ngx_posted_events);
|
|
517
|
|
518 ngx_locked_post_event(rev, queue);
|
|
519
|
|
520 } else {
|
|
521 rev->handler(rev);
|
318
|
522
|
|
523 if (ev->closed) {
|
|
524 continue;
|
|
525 }
|
236
|
526 }
|
|
527
|
|
528 if (rev->accept) {
|
|
529 if (ngx_use_accept_mutex) {
|
|
530 ngx_accept_events = 1;
|
|
531 continue;
|
|
532 }
|
|
533
|
|
534 if (port_associate(ep, PORT_SOURCE_FD, c->fd, POLLIN,
|
|
535 (void *) ((uintptr_t) ev | ev->instance))
|
|
536 == -1)
|
|
537 {
|
|
538 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno,
|
|
539 "port_associate() failed");
|
|
540 return NGX_ERROR;
|
|
541 }
|
|
542 }
|
|
543 }
|
|
544
|
|
545 if (revents & POLLOUT) {
|
|
546
|
|
547 if (flags & NGX_POST_THREAD_EVENTS) {
|
|
548 wev->posted_ready = 1;
|
|
549
|
|
550 } else {
|
|
551 wev->ready = 1;
|
|
552 }
|
|
553
|
|
554 if (flags & NGX_POST_EVENTS) {
|
|
555 ngx_locked_post_event(wev, &ngx_posted_events);
|
|
556
|
|
557 } else {
|
|
558 wev->handler(wev);
|
|
559 }
|
|
560 }
|
|
561
|
|
562 continue;
|
|
563
|
|
564 default:
|
|
565 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
|
|
566 "unexpected even_port object %d",
|
|
567 event_list[i].portev_object);
|
|
568 continue;
|
|
569 }
|
|
570 }
|
|
571
|
|
572 ngx_mutex_unlock(ngx_posted_events_mutex);
|
|
573
|
|
574 return NGX_OK;
|
|
575 }
|
|
576
|
|
577
|
|
578 static void *
|
|
579 ngx_eventport_create_conf(ngx_cycle_t *cycle)
|
|
580 {
|
|
581 ngx_eventport_conf_t *epcf;
|
|
582
|
|
583 epcf = ngx_palloc(cycle->pool, sizeof(ngx_eventport_conf_t));
|
|
584 if (epcf == NULL) {
|
496
|
585 return NULL;
|
236
|
586 }
|
|
587
|
|
588 epcf->events = NGX_CONF_UNSET;
|
|
589
|
|
590 return epcf;
|
|
591 }
|
|
592
|
|
593
|
|
594 static char *
|
|
595 ngx_eventport_init_conf(ngx_cycle_t *cycle, void *conf)
|
|
596 {
|
|
597 ngx_eventport_conf_t *epcf = conf;
|
|
598
|
|
599 ngx_conf_init_uint_value(epcf->events, 32);
|
|
600
|
|
601 return NGX_CONF_OK;
|
|
602 }
|