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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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660
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4 * Copyright (C) Nginx, Inc.
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0
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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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18
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13 #if (NGX_TEST_BUILD_EPOLL)
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0
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14
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15 /* epoll declarations */
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16
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17 #define EPOLLIN 0x001
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18 #define EPOLLPRI 0x002
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19 #define EPOLLOUT 0x004
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20 #define EPOLLRDNORM 0x040
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21 #define EPOLLRDBAND 0x080
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22 #define EPOLLWRNORM 0x100
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23 #define EPOLLWRBAND 0x200
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24 #define EPOLLMSG 0x400
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25 #define EPOLLERR 0x008
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26 #define EPOLLHUP 0x010
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27
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28 #define EPOLLET 0x80000000
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29 #define EPOLLONESHOT 0x40000000
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30
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31 #define EPOLL_CTL_ADD 1
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32 #define EPOLL_CTL_DEL 2
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33 #define EPOLL_CTL_MOD 3
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34
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35 typedef union epoll_data {
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36 void *ptr;
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37 int fd;
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38 uint32_t u32;
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39 uint64_t u64;
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40 } epoll_data_t;
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41
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42 struct epoll_event {
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43 uint32_t events;
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44 epoll_data_t data;
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45 };
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46
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47 int epoll_create(int size)
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48 {
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49 return -1;
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50 }
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51
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52 int epoll_ctl(int epfd, int op, int fd, struct epoll_event *event)
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53 {
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54 return -1;
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55 }
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56
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57 int epoll_wait(int epfd, struct epoll_event *events, int nevents, int timeout)
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58 {
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59 return -1;
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60 }
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61
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518
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62 #if (NGX_HAVE_FILE_AIO)
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63
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64 #define SYS_io_setup 245
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65 #define SYS_io_destroy 246
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66 #define SYS_io_getevents 247
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67 #define SYS_eventfd 323
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68
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69 typedef u_int aio_context_t;
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70
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71 struct io_event {
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72 uint64_t data; /* the data field from the iocb */
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73 uint64_t obj; /* what iocb this event came from */
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74 int64_t res; /* result code for this event */
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75 int64_t res2; /* secondary result */
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76 };
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77
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78
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79 int eventfd(u_int initval)
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80 {
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81 return -1;
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82 }
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83
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84 #endif
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0
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85 #endif
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86
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87
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88 typedef struct {
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324
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89 ngx_uint_t events;
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640
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90 ngx_uint_t aio_requests;
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0
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91 } ngx_epoll_conf_t;
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92
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93
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112
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94 static ngx_int_t ngx_epoll_init(ngx_cycle_t *cycle, ngx_msec_t timer);
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0
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95 static void ngx_epoll_done(ngx_cycle_t *cycle);
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324
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96 static ngx_int_t ngx_epoll_add_event(ngx_event_t *ev, ngx_int_t event,
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97 ngx_uint_t flags);
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98 static ngx_int_t ngx_epoll_del_event(ngx_event_t *ev, ngx_int_t event,
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99 ngx_uint_t flags);
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48
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100 static ngx_int_t ngx_epoll_add_connection(ngx_connection_t *c);
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324
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101 static ngx_int_t ngx_epoll_del_connection(ngx_connection_t *c,
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102 ngx_uint_t flags);
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112
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103 static ngx_int_t ngx_epoll_process_events(ngx_cycle_t *cycle, ngx_msec_t timer,
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104 ngx_uint_t flags);
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0
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105
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518
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106 #if (NGX_HAVE_FILE_AIO)
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107 static void ngx_epoll_eventfd_handler(ngx_event_t *ev);
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108 #endif
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109
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0
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110 static void *ngx_epoll_create_conf(ngx_cycle_t *cycle);
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111 static char *ngx_epoll_init_conf(ngx_cycle_t *cycle, void *conf);
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112
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113 static int ep = -1;
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114 static struct epoll_event *event_list;
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324
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115 static ngx_uint_t nevents;
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0
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116
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518
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117 #if (NGX_HAVE_FILE_AIO)
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118
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119 int ngx_eventfd = -1;
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120 aio_context_t ngx_aio_ctx = 0;
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121
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122 static ngx_event_t ngx_eventfd_event;
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123 static ngx_connection_t ngx_eventfd_conn;
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124
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125 #endif
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0
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126
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127 static ngx_str_t epoll_name = ngx_string("epoll");
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128
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129 static ngx_command_t ngx_epoll_commands[] = {
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130
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48
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131 { ngx_string("epoll_events"),
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132 NGX_EVENT_CONF|NGX_CONF_TAKE1,
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133 ngx_conf_set_num_slot,
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134 0,
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135 offsetof(ngx_epoll_conf_t, events),
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136 NULL },
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0
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137
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640
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138 { ngx_string("worker_aio_requests"),
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139 NGX_EVENT_CONF|NGX_CONF_TAKE1,
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140 ngx_conf_set_num_slot,
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141 0,
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142 offsetof(ngx_epoll_conf_t, aio_requests),
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143 NULL },
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144
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48
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145 ngx_null_command
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0
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146 };
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147
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148
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149 ngx_event_module_t ngx_epoll_module_ctx = {
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150 &epoll_name,
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151 ngx_epoll_create_conf, /* create configuration */
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152 ngx_epoll_init_conf, /* init configuration */
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153
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154 {
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155 ngx_epoll_add_event, /* add an event */
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156 ngx_epoll_del_event, /* delete an event */
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157 ngx_epoll_add_event, /* enable an event */
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158 ngx_epoll_del_event, /* disable an event */
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159 ngx_epoll_add_connection, /* add an connection */
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160 ngx_epoll_del_connection, /* delete an connection */
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161 NULL, /* process the changes */
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162 ngx_epoll_process_events, /* process the events */
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163 ngx_epoll_init, /* init the events */
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164 ngx_epoll_done, /* done the events */
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165 }
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166 };
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167
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168 ngx_module_t ngx_epoll_module = {
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58
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169 NGX_MODULE_V1,
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0
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170 &ngx_epoll_module_ctx, /* module context */
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171 ngx_epoll_commands, /* module directives */
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172 NGX_EVENT_MODULE, /* module type */
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90
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173 NULL, /* init master */
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0
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174 NULL, /* init module */
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90
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175 NULL, /* init process */
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176 NULL, /* init thread */
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177 NULL, /* exit thread */
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178 NULL, /* exit process */
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179 NULL, /* exit master */
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180 NGX_MODULE_V1_PADDING
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0
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181 };
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182
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183
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518
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184 #if (NGX_HAVE_FILE_AIO)
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185
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186 /*
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187 * We call io_setup(), io_destroy() io_submit(), and io_getevents() directly
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188 * as syscalls instead of libaio usage, because the library header file
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189 * supports eventfd() since 0.3.107 version only.
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190 *
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191 * Also we do not use eventfd() in glibc, because glibc supports it
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192 * since 2.8 version and glibc maps two syscalls eventfd() and eventfd2()
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193 * into single eventfd() function with different number of parameters.
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194 */
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195
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640
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196 static int
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518
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197 io_setup(u_int nr_reqs, aio_context_t *ctx)
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198 {
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199 return syscall(SYS_io_setup, nr_reqs, ctx);
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200 }
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201
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202
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203 static int
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204 io_destroy(aio_context_t ctx)
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205 {
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206 return syscall(SYS_io_destroy, ctx);
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207 }
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208
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209
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640
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210 static int
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518
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211 io_getevents(aio_context_t ctx, long min_nr, long nr, struct io_event *events,
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212 struct timespec *tmo)
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213 {
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214 return syscall(SYS_io_getevents, ctx, min_nr, nr, events, tmo);
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215 }
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216
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640
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217
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218 static void
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219 ngx_epoll_aio_init(ngx_cycle_t *cycle, ngx_epoll_conf_t *epcf)
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220 {
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221 int n;
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222 struct epoll_event ee;
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223
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224 ngx_eventfd = syscall(SYS_eventfd, 0);
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225
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226 if (ngx_eventfd == -1) {
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227 ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
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228 "eventfd() failed");
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229 ngx_file_aio = 0;
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230 return;
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231 }
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232
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233 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
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234 "eventfd: %d", ngx_eventfd);
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235
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236 n = 1;
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237
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238 if (ioctl(ngx_eventfd, FIONBIO, &n) == -1) {
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239 ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
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240 "ioctl(eventfd, FIONBIO) failed");
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241 goto failed;
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242 }
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243
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244 if (io_setup(epcf->aio_requests, &ngx_aio_ctx) == -1) {
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245 ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
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246 "io_setup() failed");
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247 goto failed;
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248 }
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249
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250 ngx_eventfd_event.data = &ngx_eventfd_conn;
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251 ngx_eventfd_event.handler = ngx_epoll_eventfd_handler;
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252 ngx_eventfd_event.log = cycle->log;
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253 ngx_eventfd_event.active = 1;
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254 ngx_eventfd_conn.fd = ngx_eventfd;
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255 ngx_eventfd_conn.read = &ngx_eventfd_event;
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256 ngx_eventfd_conn.log = cycle->log;
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257
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258 ee.events = EPOLLIN|EPOLLET;
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259 ee.data.ptr = &ngx_eventfd_conn;
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260
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261 if (epoll_ctl(ep, EPOLL_CTL_ADD, ngx_eventfd, &ee) != -1) {
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262 return;
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263 }
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264
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265 ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
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266 "epoll_ctl(EPOLL_CTL_ADD, eventfd) failed");
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267
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268 if (io_destroy(ngx_aio_ctx) == -1) {
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269 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
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270 "io_destroy() failed");
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271 }
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272
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273 failed:
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274
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275 if (close(ngx_eventfd) == -1) {
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276 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
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277 "eventfd close() failed");
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278 }
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279
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280 ngx_eventfd = -1;
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281 ngx_aio_ctx = 0;
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282 ngx_file_aio = 0;
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283 }
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284
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518
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285 #endif
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286
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287
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48
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288 static ngx_int_t
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112
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289 ngx_epoll_init(ngx_cycle_t *cycle, ngx_msec_t timer)
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0
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290 {
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291 ngx_epoll_conf_t *epcf;
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292
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293 epcf = ngx_event_get_conf(cycle->conf_ctx, ngx_epoll_module);
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294
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295 if (ep == -1) {
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384
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296 ep = epoll_create(cycle->connection_n / 2);
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0
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297
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298 if (ep == -1) {
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299 ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
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300 "epoll_create() failed");
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301 return NGX_ERROR;
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302 }
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518
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303
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304 #if (NGX_HAVE_FILE_AIO)
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305
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640
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306 ngx_epoll_aio_init(cycle, epcf);
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518
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307
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308 #endif
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0
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309 }
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310
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311 if (nevents < epcf->events) {
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312 if (event_list) {
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313 ngx_free(event_list);
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314 }
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315
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316 event_list = ngx_alloc(sizeof(struct epoll_event) * epcf->events,
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317 cycle->log);
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318 if (event_list == NULL) {
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319 return NGX_ERROR;
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320 }
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321 }
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322
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323 nevents = epcf->events;
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324
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325 ngx_io = ngx_os_io;
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326
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327 ngx_event_actions = ngx_epoll_module_ctx.actions;
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328
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18
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329 #if (NGX_HAVE_CLEAR_EVENT)
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0
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330 ngx_event_flags = NGX_USE_CLEAR_EVENT
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331 #else
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332 ngx_event_flags = NGX_USE_LEVEL_EVENT
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333 #endif
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4
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334 |NGX_USE_GREEDY_EVENT
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0
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335 |NGX_USE_EPOLL_EVENT;
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336
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337 return NGX_OK;
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338 }
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339
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340
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48
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341 static void
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342 ngx_epoll_done(ngx_cycle_t *cycle)
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0
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343 {
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344 if (close(ep) == -1) {
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345 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
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346 "epoll close() failed");
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347 }
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348
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349 ep = -1;
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350
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518
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351 #if (NGX_HAVE_FILE_AIO)
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352
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640
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353 if (ngx_eventfd != -1) {
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354
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355 if (io_destroy(ngx_aio_ctx) == -1) {
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356 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
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357 "io_destroy() failed");
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358 }
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359
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360 if (close(ngx_eventfd) == -1) {
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361 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
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362 "eventfd close() failed");
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363 }
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364
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365 ngx_eventfd = -1;
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518
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366 }
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367
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368 ngx_aio_ctx = 0;
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369
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370 #endif
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371
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0
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372 ngx_free(event_list);
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373
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374 event_list = NULL;
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375 nevents = 0;
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376 }
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377
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378
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48
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379 static ngx_int_t
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324
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380 ngx_epoll_add_event(ngx_event_t *ev, ngx_int_t event, ngx_uint_t flags)
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0
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381 {
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32
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382 int op;
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383 uint32_t events, prev;
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0
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384 ngx_event_t *e;
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385 ngx_connection_t *c;
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386 struct epoll_event ee;
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387
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388 c = ev->data;
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389
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32
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390 events = (uint32_t) event;
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391
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0
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392 if (event == NGX_READ_EVENT) {
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393 e = c->write;
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394 prev = EPOLLOUT;
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395 #if (NGX_READ_EVENT != EPOLLIN)
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32
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396 events = EPOLLIN;
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0
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397 #endif
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398
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399 } else {
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400 e = c->read;
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401 prev = EPOLLIN;
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402 #if (NGX_WRITE_EVENT != EPOLLOUT)
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32
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403 events = EPOLLOUT;
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0
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404 #endif
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405 }
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406
|
|
|
407 if (e->active) {
|
|
|
408 op = EPOLL_CTL_MOD;
|
|
32
|
409 events |= prev;
|
|
0
|
410
|
|
|
411 } else {
|
|
|
412 op = EPOLL_CTL_ADD;
|
|
|
413 }
|
|
|
414
|
|
324
|
415 ee.events = events | (uint32_t) flags;
|
|
130
|
416 ee.data.ptr = (void *) ((uintptr_t) c | ev->instance);
|
|
0
|
417
|
|
|
418 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, ev->log, 0,
|
|
10
|
419 "epoll add event: fd:%d op:%d ev:%08XD",
|
|
0
|
420 c->fd, op, ee.events);
|
|
|
421
|
|
|
422 if (epoll_ctl(ep, op, c->fd, &ee) == -1) {
|
|
|
423 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno,
|
|
|
424 "epoll_ctl(%d, %d) failed", op, c->fd);
|
|
|
425 return NGX_ERROR;
|
|
|
426 }
|
|
|
427
|
|
|
428 ev->active = 1;
|
|
|
429 #if 0
|
|
|
430 ev->oneshot = (flags & NGX_ONESHOT_EVENT) ? 1 : 0;
|
|
|
431 #endif
|
|
|
432
|
|
|
433 return NGX_OK;
|
|
|
434 }
|
|
|
435
|
|
|
436
|
|
48
|
437 static ngx_int_t
|
|
324
|
438 ngx_epoll_del_event(ngx_event_t *ev, ngx_int_t event, ngx_uint_t flags)
|
|
0
|
439 {
|
|
32
|
440 int op;
|
|
|
441 uint32_t prev;
|
|
0
|
442 ngx_event_t *e;
|
|
|
443 ngx_connection_t *c;
|
|
|
444 struct epoll_event ee;
|
|
|
445
|
|
|
446 /*
|
|
32
|
447 * when the file descriptor is closed, the epoll automatically deletes
|
|
670
|
448 * it from its queue, so we do not need to delete explicitly the event
|
|
0
|
449 * before the closing the file descriptor
|
|
|
450 */
|
|
|
451
|
|
|
452 if (flags & NGX_CLOSE_EVENT) {
|
|
|
453 ev->active = 0;
|
|
|
454 return NGX_OK;
|
|
|
455 }
|
|
|
456
|
|
|
457 c = ev->data;
|
|
|
458
|
|
|
459 if (event == NGX_READ_EVENT) {
|
|
|
460 e = c->write;
|
|
|
461 prev = EPOLLOUT;
|
|
|
462
|
|
|
463 } else {
|
|
|
464 e = c->read;
|
|
|
465 prev = EPOLLIN;
|
|
|
466 }
|
|
|
467
|
|
|
468 if (e->active) {
|
|
|
469 op = EPOLL_CTL_MOD;
|
|
324
|
470 ee.events = prev | (uint32_t) flags;
|
|
130
|
471 ee.data.ptr = (void *) ((uintptr_t) c | ev->instance);
|
|
0
|
472
|
|
|
473 } else {
|
|
|
474 op = EPOLL_CTL_DEL;
|
|
|
475 ee.events = 0;
|
|
|
476 ee.data.ptr = NULL;
|
|
|
477 }
|
|
|
478
|
|
|
479 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, ev->log, 0,
|
|
10
|
480 "epoll del event: fd:%d op:%d ev:%08XD",
|
|
0
|
481 c->fd, op, ee.events);
|
|
|
482
|
|
|
483 if (epoll_ctl(ep, op, c->fd, &ee) == -1) {
|
|
|
484 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno,
|
|
|
485 "epoll_ctl(%d, %d) failed", op, c->fd);
|
|
|
486 return NGX_ERROR;
|
|
|
487 }
|
|
|
488
|
|
|
489 ev->active = 0;
|
|
|
490
|
|
|
491 return NGX_OK;
|
|
|
492 }
|
|
|
493
|
|
|
494
|
|
48
|
495 static ngx_int_t
|
|
|
496 ngx_epoll_add_connection(ngx_connection_t *c)
|
|
0
|
497 {
|
|
|
498 struct epoll_event ee;
|
|
|
499
|
|
|
500 ee.events = EPOLLIN|EPOLLOUT|EPOLLET;
|
|
130
|
501 ee.data.ptr = (void *) ((uintptr_t) c | c->read->instance);
|
|
0
|
502
|
|
|
503 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0,
|
|
10
|
504 "epoll add connection: fd:%d ev:%08XD", c->fd, ee.events);
|
|
0
|
505
|
|
|
506 if (epoll_ctl(ep, EPOLL_CTL_ADD, c->fd, &ee) == -1) {
|
|
|
507 ngx_log_error(NGX_LOG_ALERT, c->log, ngx_errno,
|
|
|
508 "epoll_ctl(EPOLL_CTL_ADD, %d) failed", c->fd);
|
|
|
509 return NGX_ERROR;
|
|
|
510 }
|
|
|
511
|
|
|
512 c->read->active = 1;
|
|
|
513 c->write->active = 1;
|
|
|
514
|
|
|
515 return NGX_OK;
|
|
|
516 }
|
|
|
517
|
|
|
518
|
|
48
|
519 static ngx_int_t
|
|
324
|
520 ngx_epoll_del_connection(ngx_connection_t *c, ngx_uint_t flags)
|
|
0
|
521 {
|
|
324
|
522 int op;
|
|
|
523 struct epoll_event ee;
|
|
0
|
524
|
|
|
525 /*
|
|
|
526 * when the file descriptor is closed the epoll automatically deletes
|
|
670
|
527 * it from its queue so we do not need to delete explicitly the event
|
|
0
|
528 * before the closing the file descriptor
|
|
|
529 */
|
|
|
530
|
|
|
531 if (flags & NGX_CLOSE_EVENT) {
|
|
|
532 c->read->active = 0;
|
|
|
533 c->write->active = 0;
|
|
|
534 return NGX_OK;
|
|
|
535 }
|
|
|
536
|
|
|
537 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0,
|
|
|
538 "epoll del connection: fd:%d", c->fd);
|
|
|
539
|
|
|
540 op = EPOLL_CTL_DEL;
|
|
|
541 ee.events = 0;
|
|
130
|
542 ee.data.ptr = NULL;
|
|
0
|
543
|
|
|
544 if (epoll_ctl(ep, op, c->fd, &ee) == -1) {
|
|
|
545 ngx_log_error(NGX_LOG_ALERT, c->log, ngx_errno,
|
|
|
546 "epoll_ctl(%d, %d) failed", op, c->fd);
|
|
|
547 return NGX_ERROR;
|
|
|
548 }
|
|
|
549
|
|
|
550 c->read->active = 0;
|
|
|
551 c->write->active = 0;
|
|
|
552
|
|
|
553 return NGX_OK;
|
|
|
554 }
|
|
|
555
|
|
|
556
|
|
48
|
557 static ngx_int_t
|
|
112
|
558 ngx_epoll_process_events(ngx_cycle_t *cycle, ngx_msec_t timer, ngx_uint_t flags)
|
|
0
|
559 {
|
|
|
560 int events;
|
|
32
|
561 uint32_t revents;
|
|
0
|
562 ngx_int_t instance, i;
|
|
112
|
563 ngx_uint_t level;
|
|
0
|
564 ngx_err_t err;
|
|
112
|
565 ngx_event_t *rev, *wev, **queue;
|
|
0
|
566 ngx_connection_t *c;
|
|
|
567
|
|
|
568 /* NGX_TIMER_INFINITE == INFTIM */
|
|
|
569
|
|
|
570 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
|
|
106
|
571 "epoll timer: %M", timer);
|
|
0
|
572
|
|
324
|
573 events = epoll_wait(ep, event_list, (int) nevents, timer);
|
|
0
|
574
|
|
518
|
575 err = (events == -1) ? ngx_errno : 0;
|
|
0
|
576
|
|
566
|
577 if (flags & NGX_UPDATE_TIME || ngx_event_timer_alarm) {
|
|
|
578 ngx_time_update();
|
|
112
|
579 }
|
|
0
|
580
|
|
|
581 if (err) {
|
|
112
|
582 if (err == NGX_EINTR) {
|
|
|
583
|
|
|
584 if (ngx_event_timer_alarm) {
|
|
|
585 ngx_event_timer_alarm = 0;
|
|
|
586 return NGX_OK;
|
|
|
587 }
|
|
126
|
588
|
|
112
|
589 level = NGX_LOG_INFO;
|
|
126
|
590
|
|
|
591 } else {
|
|
112
|
592 level = NGX_LOG_ALERT;
|
|
|
593 }
|
|
|
594
|
|
|
595 ngx_log_error(level, cycle->log, err, "epoll_wait() failed");
|
|
0
|
596 return NGX_ERROR;
|
|
|
597 }
|
|
|
598
|
|
112
|
599 if (events == 0) {
|
|
116
|
600 if (timer != NGX_TIMER_INFINITE) {
|
|
|
601 return NGX_OK;
|
|
|
602 }
|
|
|
603
|
|
|
604 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
|
|
|
605 "epoll_wait() returned no events without timeout");
|
|
|
606 return NGX_ERROR;
|
|
112
|
607 }
|
|
0
|
608
|
|
112
|
609 ngx_mutex_lock(ngx_posted_events_mutex);
|
|
0
|
610
|
|
|
611 for (i = 0; i < events; i++) {
|
|
|
612 c = event_list[i].data.ptr;
|
|
|
613
|
|
|
614 instance = (uintptr_t) c & 1;
|
|
|
615 c = (ngx_connection_t *) ((uintptr_t) c & (uintptr_t) ~1);
|
|
|
616
|
|
|
617 rev = c->read;
|
|
|
618
|
|
|
619 if (c->fd == -1 || rev->instance != instance) {
|
|
|
620
|
|
|
621 /*
|
|
|
622 * the stale event from a file descriptor
|
|
|
623 * that was just closed in this iteration
|
|
|
624 */
|
|
|
625
|
|
|
626 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
|
|
10
|
627 "epoll: stale event %p", c);
|
|
0
|
628 continue;
|
|
|
629 }
|
|
|
630
|
|
32
|
631 revents = event_list[i].events;
|
|
|
632
|
|
622
|
633 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
|
|
10
|
634 "epoll: fd:%d ev:%04XD d:%p",
|
|
126
|
635 c->fd, revents, event_list[i].data.ptr);
|
|
0
|
636
|
|
32
|
637 if (revents & (EPOLLERR|EPOLLHUP)) {
|
|
622
|
638 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
|
|
10
|
639 "epoll_wait() error on fd:%d ev:%04XD",
|
|
32
|
640 c->fd, revents);
|
|
|
641 }
|
|
|
642
|
|
212
|
643 #if 0
|
|
32
|
644 if (revents & ~(EPOLLIN|EPOLLOUT|EPOLLERR|EPOLLHUP)) {
|
|
622
|
645 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
|
|
32
|
646 "strange epoll_wait() events fd:%d ev:%04XD",
|
|
|
647 c->fd, revents);
|
|
0
|
648 }
|
|
212
|
649 #endif
|
|
0
|
650
|
|
32
|
651 if ((revents & (EPOLLERR|EPOLLHUP))
|
|
|
652 && (revents & (EPOLLIN|EPOLLOUT)) == 0)
|
|
|
653 {
|
|
|
654 /*
|
|
|
655 * if the error events were returned without EPOLLIN or EPOLLOUT,
|
|
|
656 * then add these flags to handle the events at least in one
|
|
|
657 * active handler
|
|
|
658 */
|
|
|
659
|
|
|
660 revents |= EPOLLIN|EPOLLOUT;
|
|
0
|
661 }
|
|
|
662
|
|
112
|
663 if ((revents & EPOLLIN) && rev->active) {
|
|
|
664
|
|
|
665 if ((flags & NGX_POST_THREAD_EVENTS) && !rev->accept) {
|
|
|
666 rev->posted_ready = 1;
|
|
|
667
|
|
|
668 } else {
|
|
|
669 rev->ready = 1;
|
|
|
670 }
|
|
|
671
|
|
|
672 if (flags & NGX_POST_EVENTS) {
|
|
|
673 queue = (ngx_event_t **) (rev->accept ?
|
|
|
674 &ngx_posted_accept_events : &ngx_posted_events);
|
|
|
675
|
|
|
676 ngx_locked_post_event(rev, queue);
|
|
|
677
|
|
|
678 } else {
|
|
|
679 rev->handler(rev);
|
|
|
680 }
|
|
|
681 }
|
|
|
682
|
|
0
|
683 wev = c->write;
|
|
|
684
|
|
652
|
685 if ((revents & EPOLLOUT) && wev->active) {
|
|
650
|
686
|
|
652
|
687 if (c->fd == -1 || wev->instance != instance) {
|
|
650
|
688
|
|
652
|
689 /*
|
|
|
690 * the stale event from a file descriptor
|
|
|
691 * that was just closed in this iteration
|
|
|
692 */
|
|
650
|
693
|
|
652
|
694 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
|
|
|
695 "epoll: stale event %p", c);
|
|
|
696 continue;
|
|
|
697 }
|
|
32
|
698
|
|
112
|
699 if (flags & NGX_POST_THREAD_EVENTS) {
|
|
0
|
700 wev->posted_ready = 1;
|
|
|
701
|
|
|
702 } else {
|
|
|
703 wev->ready = 1;
|
|
|
704 }
|
|
|
705
|
|
112
|
706 if (flags & NGX_POST_EVENTS) {
|
|
|
707 ngx_locked_post_event(wev, &ngx_posted_events);
|
|
0
|
708
|
|
112
|
709 } else {
|
|
|
710 wev->handler(wev);
|
|
0
|
711 }
|
|
|
712 }
|
|
|
713 }
|
|
|
714
|
|
112
|
715 ngx_mutex_unlock(ngx_posted_events_mutex);
|
|
0
|
716
|
|
|
717 return NGX_OK;
|
|
|
718 }
|
|
|
719
|
|
|
720
|
|
518
|
721 #if (NGX_HAVE_FILE_AIO)
|
|
|
722
|
|
|
723 static void
|
|
|
724 ngx_epoll_eventfd_handler(ngx_event_t *ev)
|
|
|
725 {
|
|
640
|
726 int n, events;
|
|
|
727 long i;
|
|
518
|
728 uint64_t ready;
|
|
|
729 ngx_err_t err;
|
|
|
730 ngx_event_t *e;
|
|
|
731 ngx_event_aio_t *aio;
|
|
|
732 struct io_event event[64];
|
|
|
733 struct timespec ts;
|
|
|
734
|
|
|
735 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, ev->log, 0, "eventfd handler");
|
|
|
736
|
|
|
737 n = read(ngx_eventfd, &ready, 8);
|
|
|
738
|
|
|
739 err = ngx_errno;
|
|
|
740
|
|
|
741 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, ev->log, 0, "eventfd: %d", n);
|
|
|
742
|
|
|
743 if (n != 8) {
|
|
|
744 if (n == -1) {
|
|
|
745 if (err == NGX_EAGAIN) {
|
|
|
746 return;
|
|
|
747 }
|
|
|
748
|
|
|
749 ngx_log_error(NGX_LOG_ALERT, ev->log, err, "read(eventfd) failed");
|
|
|
750 return;
|
|
|
751 }
|
|
|
752
|
|
|
753 ngx_log_error(NGX_LOG_ALERT, ev->log, 0,
|
|
|
754 "read(eventfd) returned only %d bytes", n);
|
|
|
755 return;
|
|
|
756 }
|
|
|
757
|
|
|
758 ts.tv_sec = 0;
|
|
|
759 ts.tv_nsec = 0;
|
|
|
760
|
|
|
761 while (ready) {
|
|
|
762
|
|
|
763 events = io_getevents(ngx_aio_ctx, 1, 64, event, &ts);
|
|
|
764
|
|
|
765 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, ev->log, 0,
|
|
|
766 "io_getevents: %l", events);
|
|
|
767
|
|
|
768 if (events > 0) {
|
|
|
769 ready -= events;
|
|
|
770
|
|
|
771 for (i = 0; i < events; i++) {
|
|
|
772
|
|
|
773 ngx_log_debug4(NGX_LOG_DEBUG_EVENT, ev->log, 0,
|
|
|
774 "io_event: %uXL %uXL %L %L",
|
|
|
775 event[i].data, event[i].obj,
|
|
|
776 event[i].res, event[i].res2);
|
|
|
777
|
|
|
778 e = (ngx_event_t *) (uintptr_t) event[i].data;
|
|
|
779
|
|
|
780 e->complete = 1;
|
|
|
781 e->active = 0;
|
|
|
782 e->ready = 1;
|
|
|
783
|
|
|
784 aio = e->data;
|
|
|
785 aio->res = event[i].res;
|
|
|
786
|
|
|
787 ngx_post_event(e, &ngx_posted_events);
|
|
|
788 }
|
|
|
789
|
|
|
790 continue;
|
|
|
791 }
|
|
|
792
|
|
|
793 if (events == 0) {
|
|
|
794 return;
|
|
|
795 }
|
|
|
796
|
|
640
|
797 /* events == -1 */
|
|
|
798 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno,
|
|
|
799 "io_getevents() failed");
|
|
518
|
800 return;
|
|
|
801 }
|
|
|
802 }
|
|
|
803
|
|
|
804 #endif
|
|
|
805
|
|
|
806
|
|
48
|
807 static void *
|
|
|
808 ngx_epoll_create_conf(ngx_cycle_t *cycle)
|
|
0
|
809 {
|
|
|
810 ngx_epoll_conf_t *epcf;
|
|
|
811
|
|
50
|
812 epcf = ngx_palloc(cycle->pool, sizeof(ngx_epoll_conf_t));
|
|
|
813 if (epcf == NULL) {
|
|
496
|
814 return NULL;
|
|
50
|
815 }
|
|
0
|
816
|
|
|
817 epcf->events = NGX_CONF_UNSET;
|
|
640
|
818 epcf->aio_requests = NGX_CONF_UNSET;
|
|
0
|
819
|
|
|
820 return epcf;
|
|
|
821 }
|
|
|
822
|
|
|
823
|
|
48
|
824 static char *
|
|
|
825 ngx_epoll_init_conf(ngx_cycle_t *cycle, void *conf)
|
|
0
|
826 {
|
|
|
827 ngx_epoll_conf_t *epcf = conf;
|
|
|
828
|
|
212
|
829 ngx_conf_init_uint_value(epcf->events, 512);
|
|
640
|
830 ngx_conf_init_uint_value(epcf->aio_requests, 32);
|
|
0
|
831
|
|
|
832 return NGX_CONF_OK;
|
|
|
833 }
|
