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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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682
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47
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48 int epoll_create(int size);
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49
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0
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50 int epoll_create(int size)
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51 {
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52 return -1;
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53 }
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54
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682
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55
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56 int epoll_ctl(int epfd, int op, int fd, struct epoll_event *event);
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57
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0
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58 int epoll_ctl(int epfd, int op, int fd, struct epoll_event *event)
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59 {
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60 return -1;
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61 }
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62
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682
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63
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64 int epoll_wait(int epfd, struct epoll_event *events, int nevents, int timeout);
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65
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0
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66 int epoll_wait(int epfd, struct epoll_event *events, int nevents, int timeout)
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67 {
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68 return -1;
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69 }
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70
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518
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71 #if (NGX_HAVE_FILE_AIO)
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72
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73 #define SYS_io_setup 245
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74 #define SYS_io_destroy 246
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75 #define SYS_io_getevents 247
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76 #define SYS_eventfd 323
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77
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78 typedef u_int aio_context_t;
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79
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80 struct io_event {
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81 uint64_t data; /* the data field from the iocb */
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82 uint64_t obj; /* what iocb this event came from */
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83 int64_t res; /* result code for this event */
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84 int64_t res2; /* secondary result */
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85 };
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86
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87
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88 #endif
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0
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89 #endif
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90
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91
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92 typedef struct {
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324
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93 ngx_uint_t events;
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640
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94 ngx_uint_t aio_requests;
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0
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95 } ngx_epoll_conf_t;
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96
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97
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112
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98 static ngx_int_t ngx_epoll_init(ngx_cycle_t *cycle, ngx_msec_t timer);
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0
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99 static void ngx_epoll_done(ngx_cycle_t *cycle);
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324
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100 static ngx_int_t ngx_epoll_add_event(ngx_event_t *ev, ngx_int_t event,
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101 ngx_uint_t flags);
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102 static ngx_int_t ngx_epoll_del_event(ngx_event_t *ev, ngx_int_t event,
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103 ngx_uint_t flags);
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48
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104 static ngx_int_t ngx_epoll_add_connection(ngx_connection_t *c);
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324
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105 static ngx_int_t ngx_epoll_del_connection(ngx_connection_t *c,
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106 ngx_uint_t flags);
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112
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107 static ngx_int_t ngx_epoll_process_events(ngx_cycle_t *cycle, ngx_msec_t timer,
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108 ngx_uint_t flags);
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0
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109
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518
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110 #if (NGX_HAVE_FILE_AIO)
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111 static void ngx_epoll_eventfd_handler(ngx_event_t *ev);
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112 #endif
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113
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0
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114 static void *ngx_epoll_create_conf(ngx_cycle_t *cycle);
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115 static char *ngx_epoll_init_conf(ngx_cycle_t *cycle, void *conf);
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116
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117 static int ep = -1;
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118 static struct epoll_event *event_list;
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324
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119 static ngx_uint_t nevents;
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0
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120
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518
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121 #if (NGX_HAVE_FILE_AIO)
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122
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123 int ngx_eventfd = -1;
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124 aio_context_t ngx_aio_ctx = 0;
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125
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126 static ngx_event_t ngx_eventfd_event;
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127 static ngx_connection_t ngx_eventfd_conn;
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128
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129 #endif
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0
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130
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131 static ngx_str_t epoll_name = ngx_string("epoll");
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132
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133 static ngx_command_t ngx_epoll_commands[] = {
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134
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48
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135 { ngx_string("epoll_events"),
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136 NGX_EVENT_CONF|NGX_CONF_TAKE1,
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137 ngx_conf_set_num_slot,
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138 0,
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139 offsetof(ngx_epoll_conf_t, events),
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140 NULL },
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0
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141
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640
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142 { ngx_string("worker_aio_requests"),
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143 NGX_EVENT_CONF|NGX_CONF_TAKE1,
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144 ngx_conf_set_num_slot,
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145 0,
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146 offsetof(ngx_epoll_conf_t, aio_requests),
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147 NULL },
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148
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48
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149 ngx_null_command
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0
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150 };
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151
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152
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153 ngx_event_module_t ngx_epoll_module_ctx = {
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154 &epoll_name,
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155 ngx_epoll_create_conf, /* create configuration */
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156 ngx_epoll_init_conf, /* init configuration */
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157
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158 {
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159 ngx_epoll_add_event, /* add an event */
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160 ngx_epoll_del_event, /* delete an event */
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161 ngx_epoll_add_event, /* enable an event */
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162 ngx_epoll_del_event, /* disable an event */
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163 ngx_epoll_add_connection, /* add an connection */
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164 ngx_epoll_del_connection, /* delete an connection */
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165 NULL, /* process the changes */
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166 ngx_epoll_process_events, /* process the events */
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167 ngx_epoll_init, /* init the events */
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168 ngx_epoll_done, /* done the events */
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169 }
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170 };
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171
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172 ngx_module_t ngx_epoll_module = {
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58
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173 NGX_MODULE_V1,
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0
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174 &ngx_epoll_module_ctx, /* module context */
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175 ngx_epoll_commands, /* module directives */
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176 NGX_EVENT_MODULE, /* module type */
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90
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177 NULL, /* init master */
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0
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178 NULL, /* init module */
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90
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179 NULL, /* init process */
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180 NULL, /* init thread */
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181 NULL, /* exit thread */
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182 NULL, /* exit process */
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183 NULL, /* exit master */
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184 NGX_MODULE_V1_PADDING
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0
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185 };
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186
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187
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518
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188 #if (NGX_HAVE_FILE_AIO)
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189
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190 /*
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191 * We call io_setup(), io_destroy() io_submit(), and io_getevents() directly
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192 * as syscalls instead of libaio usage, because the library header file
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193 * supports eventfd() since 0.3.107 version only.
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194 *
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195 * Also we do not use eventfd() in glibc, because glibc supports it
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196 * since 2.8 version and glibc maps two syscalls eventfd() and eventfd2()
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197 * into single eventfd() function with different number of parameters.
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198 */
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199
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640
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200 static int
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518
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201 io_setup(u_int nr_reqs, aio_context_t *ctx)
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202 {
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203 return syscall(SYS_io_setup, nr_reqs, ctx);
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204 }
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205
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206
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207 static int
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208 io_destroy(aio_context_t ctx)
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209 {
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210 return syscall(SYS_io_destroy, ctx);
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211 }
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212
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213
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640
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214 static int
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518
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215 io_getevents(aio_context_t ctx, long min_nr, long nr, struct io_event *events,
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216 struct timespec *tmo)
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217 {
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218 return syscall(SYS_io_getevents, ctx, min_nr, nr, events, tmo);
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219 }
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220
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640
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221
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222 static void
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223 ngx_epoll_aio_init(ngx_cycle_t *cycle, ngx_epoll_conf_t *epcf)
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224 {
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225 int n;
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226 struct epoll_event ee;
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227
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228 ngx_eventfd = syscall(SYS_eventfd, 0);
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229
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230 if (ngx_eventfd == -1) {
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231 ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
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232 "eventfd() failed");
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233 ngx_file_aio = 0;
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234 return;
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235 }
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236
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237 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
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238 "eventfd: %d", ngx_eventfd);
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239
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240 n = 1;
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241
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242 if (ioctl(ngx_eventfd, FIONBIO, &n) == -1) {
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243 ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
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244 "ioctl(eventfd, FIONBIO) failed");
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245 goto failed;
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246 }
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247
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248 if (io_setup(epcf->aio_requests, &ngx_aio_ctx) == -1) {
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249 ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
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250 "io_setup() failed");
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251 goto failed;
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252 }
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253
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254 ngx_eventfd_event.data = &ngx_eventfd_conn;
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255 ngx_eventfd_event.handler = ngx_epoll_eventfd_handler;
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256 ngx_eventfd_event.log = cycle->log;
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257 ngx_eventfd_event.active = 1;
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258 ngx_eventfd_conn.fd = ngx_eventfd;
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259 ngx_eventfd_conn.read = &ngx_eventfd_event;
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260 ngx_eventfd_conn.log = cycle->log;
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261
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262 ee.events = EPOLLIN|EPOLLET;
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263 ee.data.ptr = &ngx_eventfd_conn;
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264
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265 if (epoll_ctl(ep, EPOLL_CTL_ADD, ngx_eventfd, &ee) != -1) {
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266 return;
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267 }
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268
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269 ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
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270 "epoll_ctl(EPOLL_CTL_ADD, eventfd) failed");
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271
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272 if (io_destroy(ngx_aio_ctx) == -1) {
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273 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
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274 "io_destroy() failed");
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275 }
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276
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277 failed:
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278
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279 if (close(ngx_eventfd) == -1) {
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280 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
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281 "eventfd close() failed");
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282 }
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283
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284 ngx_eventfd = -1;
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285 ngx_aio_ctx = 0;
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286 ngx_file_aio = 0;
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287 }
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288
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518
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289 #endif
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290
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291
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48
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292 static ngx_int_t
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112
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293 ngx_epoll_init(ngx_cycle_t *cycle, ngx_msec_t timer)
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0
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294 {
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295 ngx_epoll_conf_t *epcf;
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296
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297 epcf = ngx_event_get_conf(cycle->conf_ctx, ngx_epoll_module);
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298
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299 if (ep == -1) {
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384
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300 ep = epoll_create(cycle->connection_n / 2);
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0
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301
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302 if (ep == -1) {
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303 ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
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304 "epoll_create() failed");
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305 return NGX_ERROR;
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306 }
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518
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307
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308 #if (NGX_HAVE_FILE_AIO)
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309
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640
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310 ngx_epoll_aio_init(cycle, epcf);
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518
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311
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312 #endif
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0
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313 }
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314
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315 if (nevents < epcf->events) {
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316 if (event_list) {
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317 ngx_free(event_list);
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318 }
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319
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320 event_list = ngx_alloc(sizeof(struct epoll_event) * epcf->events,
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321 cycle->log);
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322 if (event_list == NULL) {
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323 return NGX_ERROR;
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324 }
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325 }
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326
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327 nevents = epcf->events;
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328
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329 ngx_io = ngx_os_io;
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330
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331 ngx_event_actions = ngx_epoll_module_ctx.actions;
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332
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18
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333 #if (NGX_HAVE_CLEAR_EVENT)
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0
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334 ngx_event_flags = NGX_USE_CLEAR_EVENT
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335 #else
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336 ngx_event_flags = NGX_USE_LEVEL_EVENT
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337 #endif
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4
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338 |NGX_USE_GREEDY_EVENT
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0
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339 |NGX_USE_EPOLL_EVENT;
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340
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341 return NGX_OK;
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342 }
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343
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344
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48
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345 static void
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346 ngx_epoll_done(ngx_cycle_t *cycle)
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0
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347 {
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348 if (close(ep) == -1) {
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349 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
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350 "epoll close() failed");
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351 }
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352
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353 ep = -1;
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354
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518
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355 #if (NGX_HAVE_FILE_AIO)
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356
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640
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357 if (ngx_eventfd != -1) {
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358
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359 if (io_destroy(ngx_aio_ctx) == -1) {
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360 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
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361 "io_destroy() failed");
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362 }
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363
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364 if (close(ngx_eventfd) == -1) {
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365 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
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366 "eventfd close() failed");
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367 }
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368
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369 ngx_eventfd = -1;
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518
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370 }
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371
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372 ngx_aio_ctx = 0;
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373
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374 #endif
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375
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0
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376 ngx_free(event_list);
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377
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378 event_list = NULL;
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379 nevents = 0;
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380 }
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381
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382
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48
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383 static ngx_int_t
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324
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384 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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385 {
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32
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386 int op;
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387 uint32_t events, prev;
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0
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388 ngx_event_t *e;
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389 ngx_connection_t *c;
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390 struct epoll_event ee;
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391
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392 c = ev->data;
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393
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32
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394 events = (uint32_t) event;
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395
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0
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396 if (event == NGX_READ_EVENT) {
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397 e = c->write;
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398 prev = EPOLLOUT;
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399 #if (NGX_READ_EVENT != EPOLLIN)
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32
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400 events = EPOLLIN;
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0
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401 #endif
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402
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403 } else {
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404 e = c->read;
|
|
|
405 prev = EPOLLIN;
|
|
|
406 #if (NGX_WRITE_EVENT != EPOLLOUT)
|
|
32
|
407 events = EPOLLOUT;
|
|
0
|
408 #endif
|
|
|
409 }
|
|
|
410
|
|
|
411 if (e->active) {
|
|
|
412 op = EPOLL_CTL_MOD;
|
|
32
|
413 events |= prev;
|
|
0
|
414
|
|
|
415 } else {
|
|
|
416 op = EPOLL_CTL_ADD;
|
|
|
417 }
|
|
|
418
|
|
324
|
419 ee.events = events | (uint32_t) flags;
|
|
130
|
420 ee.data.ptr = (void *) ((uintptr_t) c | ev->instance);
|
|
0
|
421
|
|
|
422 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, ev->log, 0,
|
|
10
|
423 "epoll add event: fd:%d op:%d ev:%08XD",
|
|
0
|
424 c->fd, op, ee.events);
|
|
|
425
|
|
|
426 if (epoll_ctl(ep, op, c->fd, &ee) == -1) {
|
|
|
427 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno,
|
|
|
428 "epoll_ctl(%d, %d) failed", op, c->fd);
|
|
|
429 return NGX_ERROR;
|
|
|
430 }
|
|
|
431
|
|
|
432 ev->active = 1;
|
|
|
433 #if 0
|
|
|
434 ev->oneshot = (flags & NGX_ONESHOT_EVENT) ? 1 : 0;
|
|
|
435 #endif
|
|
|
436
|
|
|
437 return NGX_OK;
|
|
|
438 }
|
|
|
439
|
|
|
440
|
|
48
|
441 static ngx_int_t
|
|
324
|
442 ngx_epoll_del_event(ngx_event_t *ev, ngx_int_t event, ngx_uint_t flags)
|
|
0
|
443 {
|
|
32
|
444 int op;
|
|
|
445 uint32_t prev;
|
|
0
|
446 ngx_event_t *e;
|
|
|
447 ngx_connection_t *c;
|
|
|
448 struct epoll_event ee;
|
|
|
449
|
|
|
450 /*
|
|
32
|
451 * when the file descriptor is closed, the epoll automatically deletes
|
|
670
|
452 * it from its queue, so we do not need to delete explicitly the event
|
|
0
|
453 * before the closing the file descriptor
|
|
|
454 */
|
|
|
455
|
|
|
456 if (flags & NGX_CLOSE_EVENT) {
|
|
|
457 ev->active = 0;
|
|
|
458 return NGX_OK;
|
|
|
459 }
|
|
|
460
|
|
|
461 c = ev->data;
|
|
|
462
|
|
|
463 if (event == NGX_READ_EVENT) {
|
|
|
464 e = c->write;
|
|
|
465 prev = EPOLLOUT;
|
|
|
466
|
|
|
467 } else {
|
|
|
468 e = c->read;
|
|
|
469 prev = EPOLLIN;
|
|
|
470 }
|
|
|
471
|
|
|
472 if (e->active) {
|
|
|
473 op = EPOLL_CTL_MOD;
|
|
324
|
474 ee.events = prev | (uint32_t) flags;
|
|
130
|
475 ee.data.ptr = (void *) ((uintptr_t) c | ev->instance);
|
|
0
|
476
|
|
|
477 } else {
|
|
|
478 op = EPOLL_CTL_DEL;
|
|
|
479 ee.events = 0;
|
|
|
480 ee.data.ptr = NULL;
|
|
|
481 }
|
|
|
482
|
|
|
483 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, ev->log, 0,
|
|
10
|
484 "epoll del event: fd:%d op:%d ev:%08XD",
|
|
0
|
485 c->fd, op, ee.events);
|
|
|
486
|
|
|
487 if (epoll_ctl(ep, op, c->fd, &ee) == -1) {
|
|
|
488 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno,
|
|
|
489 "epoll_ctl(%d, %d) failed", op, c->fd);
|
|
|
490 return NGX_ERROR;
|
|
|
491 }
|
|
|
492
|
|
|
493 ev->active = 0;
|
|
|
494
|
|
|
495 return NGX_OK;
|
|
|
496 }
|
|
|
497
|
|
|
498
|
|
48
|
499 static ngx_int_t
|
|
|
500 ngx_epoll_add_connection(ngx_connection_t *c)
|
|
0
|
501 {
|
|
|
502 struct epoll_event ee;
|
|
|
503
|
|
|
504 ee.events = EPOLLIN|EPOLLOUT|EPOLLET;
|
|
130
|
505 ee.data.ptr = (void *) ((uintptr_t) c | c->read->instance);
|
|
0
|
506
|
|
|
507 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, c->log, 0,
|
|
10
|
508 "epoll add connection: fd:%d ev:%08XD", c->fd, ee.events);
|
|
0
|
509
|
|
|
510 if (epoll_ctl(ep, EPOLL_CTL_ADD, c->fd, &ee) == -1) {
|
|
|
511 ngx_log_error(NGX_LOG_ALERT, c->log, ngx_errno,
|
|
|
512 "epoll_ctl(EPOLL_CTL_ADD, %d) failed", c->fd);
|
|
|
513 return NGX_ERROR;
|
|
|
514 }
|
|
|
515
|
|
|
516 c->read->active = 1;
|
|
|
517 c->write->active = 1;
|
|
|
518
|
|
|
519 return NGX_OK;
|
|
|
520 }
|
|
|
521
|
|
|
522
|
|
48
|
523 static ngx_int_t
|
|
324
|
524 ngx_epoll_del_connection(ngx_connection_t *c, ngx_uint_t flags)
|
|
0
|
525 {
|
|
324
|
526 int op;
|
|
|
527 struct epoll_event ee;
|
|
0
|
528
|
|
|
529 /*
|
|
|
530 * when the file descriptor is closed the epoll automatically deletes
|
|
670
|
531 * it from its queue so we do not need to delete explicitly the event
|
|
0
|
532 * before the closing the file descriptor
|
|
|
533 */
|
|
|
534
|
|
|
535 if (flags & NGX_CLOSE_EVENT) {
|
|
|
536 c->read->active = 0;
|
|
|
537 c->write->active = 0;
|
|
|
538 return NGX_OK;
|
|
|
539 }
|
|
|
540
|
|
|
541 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0,
|
|
|
542 "epoll del connection: fd:%d", c->fd);
|
|
|
543
|
|
|
544 op = EPOLL_CTL_DEL;
|
|
|
545 ee.events = 0;
|
|
130
|
546 ee.data.ptr = NULL;
|
|
0
|
547
|
|
|
548 if (epoll_ctl(ep, op, c->fd, &ee) == -1) {
|
|
|
549 ngx_log_error(NGX_LOG_ALERT, c->log, ngx_errno,
|
|
|
550 "epoll_ctl(%d, %d) failed", op, c->fd);
|
|
|
551 return NGX_ERROR;
|
|
|
552 }
|
|
|
553
|
|
|
554 c->read->active = 0;
|
|
|
555 c->write->active = 0;
|
|
|
556
|
|
|
557 return NGX_OK;
|
|
|
558 }
|
|
|
559
|
|
|
560
|
|
48
|
561 static ngx_int_t
|
|
112
|
562 ngx_epoll_process_events(ngx_cycle_t *cycle, ngx_msec_t timer, ngx_uint_t flags)
|
|
0
|
563 {
|
|
|
564 int events;
|
|
32
|
565 uint32_t revents;
|
|
0
|
566 ngx_int_t instance, i;
|
|
112
|
567 ngx_uint_t level;
|
|
0
|
568 ngx_err_t err;
|
|
112
|
569 ngx_event_t *rev, *wev, **queue;
|
|
0
|
570 ngx_connection_t *c;
|
|
|
571
|
|
|
572 /* NGX_TIMER_INFINITE == INFTIM */
|
|
|
573
|
|
|
574 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
|
|
106
|
575 "epoll timer: %M", timer);
|
|
0
|
576
|
|
324
|
577 events = epoll_wait(ep, event_list, (int) nevents, timer);
|
|
0
|
578
|
|
518
|
579 err = (events == -1) ? ngx_errno : 0;
|
|
0
|
580
|
|
566
|
581 if (flags & NGX_UPDATE_TIME || ngx_event_timer_alarm) {
|
|
|
582 ngx_time_update();
|
|
112
|
583 }
|
|
0
|
584
|
|
|
585 if (err) {
|
|
112
|
586 if (err == NGX_EINTR) {
|
|
|
587
|
|
|
588 if (ngx_event_timer_alarm) {
|
|
|
589 ngx_event_timer_alarm = 0;
|
|
|
590 return NGX_OK;
|
|
|
591 }
|
|
126
|
592
|
|
112
|
593 level = NGX_LOG_INFO;
|
|
126
|
594
|
|
|
595 } else {
|
|
112
|
596 level = NGX_LOG_ALERT;
|
|
|
597 }
|
|
|
598
|
|
|
599 ngx_log_error(level, cycle->log, err, "epoll_wait() failed");
|
|
0
|
600 return NGX_ERROR;
|
|
|
601 }
|
|
|
602
|
|
112
|
603 if (events == 0) {
|
|
116
|
604 if (timer != NGX_TIMER_INFINITE) {
|
|
|
605 return NGX_OK;
|
|
|
606 }
|
|
|
607
|
|
|
608 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
|
|
|
609 "epoll_wait() returned no events without timeout");
|
|
|
610 return NGX_ERROR;
|
|
112
|
611 }
|
|
0
|
612
|
|
112
|
613 ngx_mutex_lock(ngx_posted_events_mutex);
|
|
0
|
614
|
|
|
615 for (i = 0; i < events; i++) {
|
|
|
616 c = event_list[i].data.ptr;
|
|
|
617
|
|
|
618 instance = (uintptr_t) c & 1;
|
|
|
619 c = (ngx_connection_t *) ((uintptr_t) c & (uintptr_t) ~1);
|
|
|
620
|
|
|
621 rev = c->read;
|
|
|
622
|
|
|
623 if (c->fd == -1 || rev->instance != instance) {
|
|
|
624
|
|
|
625 /*
|
|
|
626 * the stale event from a file descriptor
|
|
|
627 * that was just closed in this iteration
|
|
|
628 */
|
|
|
629
|
|
|
630 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
|
|
10
|
631 "epoll: stale event %p", c);
|
|
0
|
632 continue;
|
|
|
633 }
|
|
|
634
|
|
32
|
635 revents = event_list[i].events;
|
|
|
636
|
|
622
|
637 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
|
|
10
|
638 "epoll: fd:%d ev:%04XD d:%p",
|
|
126
|
639 c->fd, revents, event_list[i].data.ptr);
|
|
0
|
640
|
|
32
|
641 if (revents & (EPOLLERR|EPOLLHUP)) {
|
|
622
|
642 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
|
|
10
|
643 "epoll_wait() error on fd:%d ev:%04XD",
|
|
32
|
644 c->fd, revents);
|
|
|
645 }
|
|
|
646
|
|
212
|
647 #if 0
|
|
32
|
648 if (revents & ~(EPOLLIN|EPOLLOUT|EPOLLERR|EPOLLHUP)) {
|
|
622
|
649 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
|
|
32
|
650 "strange epoll_wait() events fd:%d ev:%04XD",
|
|
|
651 c->fd, revents);
|
|
0
|
652 }
|
|
212
|
653 #endif
|
|
0
|
654
|
|
32
|
655 if ((revents & (EPOLLERR|EPOLLHUP))
|
|
|
656 && (revents & (EPOLLIN|EPOLLOUT)) == 0)
|
|
|
657 {
|
|
|
658 /*
|
|
|
659 * if the error events were returned without EPOLLIN or EPOLLOUT,
|
|
|
660 * then add these flags to handle the events at least in one
|
|
|
661 * active handler
|
|
|
662 */
|
|
|
663
|
|
|
664 revents |= EPOLLIN|EPOLLOUT;
|
|
0
|
665 }
|
|
|
666
|
|
112
|
667 if ((revents & EPOLLIN) && rev->active) {
|
|
|
668
|
|
|
669 if ((flags & NGX_POST_THREAD_EVENTS) && !rev->accept) {
|
|
|
670 rev->posted_ready = 1;
|
|
|
671
|
|
|
672 } else {
|
|
|
673 rev->ready = 1;
|
|
|
674 }
|
|
|
675
|
|
|
676 if (flags & NGX_POST_EVENTS) {
|
|
|
677 queue = (ngx_event_t **) (rev->accept ?
|
|
|
678 &ngx_posted_accept_events : &ngx_posted_events);
|
|
|
679
|
|
|
680 ngx_locked_post_event(rev, queue);
|
|
|
681
|
|
|
682 } else {
|
|
|
683 rev->handler(rev);
|
|
|
684 }
|
|
|
685 }
|
|
|
686
|
|
0
|
687 wev = c->write;
|
|
|
688
|
|
652
|
689 if ((revents & EPOLLOUT) && wev->active) {
|
|
650
|
690
|
|
652
|
691 if (c->fd == -1 || wev->instance != instance) {
|
|
650
|
692
|
|
652
|
693 /*
|
|
|
694 * the stale event from a file descriptor
|
|
|
695 * that was just closed in this iteration
|
|
|
696 */
|
|
650
|
697
|
|
652
|
698 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
|
|
|
699 "epoll: stale event %p", c);
|
|
|
700 continue;
|
|
|
701 }
|
|
32
|
702
|
|
112
|
703 if (flags & NGX_POST_THREAD_EVENTS) {
|
|
0
|
704 wev->posted_ready = 1;
|
|
|
705
|
|
|
706 } else {
|
|
|
707 wev->ready = 1;
|
|
|
708 }
|
|
|
709
|
|
112
|
710 if (flags & NGX_POST_EVENTS) {
|
|
|
711 ngx_locked_post_event(wev, &ngx_posted_events);
|
|
0
|
712
|
|
112
|
713 } else {
|
|
|
714 wev->handler(wev);
|
|
0
|
715 }
|
|
|
716 }
|
|
|
717 }
|
|
|
718
|
|
112
|
719 ngx_mutex_unlock(ngx_posted_events_mutex);
|
|
0
|
720
|
|
|
721 return NGX_OK;
|
|
|
722 }
|
|
|
723
|
|
|
724
|
|
518
|
725 #if (NGX_HAVE_FILE_AIO)
|
|
|
726
|
|
|
727 static void
|
|
|
728 ngx_epoll_eventfd_handler(ngx_event_t *ev)
|
|
|
729 {
|
|
640
|
730 int n, events;
|
|
|
731 long i;
|
|
518
|
732 uint64_t ready;
|
|
|
733 ngx_err_t err;
|
|
|
734 ngx_event_t *e;
|
|
|
735 ngx_event_aio_t *aio;
|
|
|
736 struct io_event event[64];
|
|
|
737 struct timespec ts;
|
|
|
738
|
|
|
739 ngx_log_debug0(NGX_LOG_DEBUG_EVENT, ev->log, 0, "eventfd handler");
|
|
|
740
|
|
|
741 n = read(ngx_eventfd, &ready, 8);
|
|
|
742
|
|
|
743 err = ngx_errno;
|
|
|
744
|
|
|
745 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, ev->log, 0, "eventfd: %d", n);
|
|
|
746
|
|
|
747 if (n != 8) {
|
|
|
748 if (n == -1) {
|
|
|
749 if (err == NGX_EAGAIN) {
|
|
|
750 return;
|
|
|
751 }
|
|
|
752
|
|
|
753 ngx_log_error(NGX_LOG_ALERT, ev->log, err, "read(eventfd) failed");
|
|
|
754 return;
|
|
|
755 }
|
|
|
756
|
|
|
757 ngx_log_error(NGX_LOG_ALERT, ev->log, 0,
|
|
|
758 "read(eventfd) returned only %d bytes", n);
|
|
|
759 return;
|
|
|
760 }
|
|
|
761
|
|
|
762 ts.tv_sec = 0;
|
|
|
763 ts.tv_nsec = 0;
|
|
|
764
|
|
|
765 while (ready) {
|
|
|
766
|
|
|
767 events = io_getevents(ngx_aio_ctx, 1, 64, event, &ts);
|
|
|
768
|
|
|
769 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, ev->log, 0,
|
|
|
770 "io_getevents: %l", events);
|
|
|
771
|
|
|
772 if (events > 0) {
|
|
|
773 ready -= events;
|
|
|
774
|
|
|
775 for (i = 0; i < events; i++) {
|
|
|
776
|
|
|
777 ngx_log_debug4(NGX_LOG_DEBUG_EVENT, ev->log, 0,
|
|
|
778 "io_event: %uXL %uXL %L %L",
|
|
|
779 event[i].data, event[i].obj,
|
|
|
780 event[i].res, event[i].res2);
|
|
|
781
|
|
|
782 e = (ngx_event_t *) (uintptr_t) event[i].data;
|
|
|
783
|
|
|
784 e->complete = 1;
|
|
|
785 e->active = 0;
|
|
|
786 e->ready = 1;
|
|
|
787
|
|
|
788 aio = e->data;
|
|
|
789 aio->res = event[i].res;
|
|
|
790
|
|
|
791 ngx_post_event(e, &ngx_posted_events);
|
|
|
792 }
|
|
|
793
|
|
|
794 continue;
|
|
|
795 }
|
|
|
796
|
|
|
797 if (events == 0) {
|
|
|
798 return;
|
|
|
799 }
|
|
|
800
|
|
640
|
801 /* events == -1 */
|
|
|
802 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno,
|
|
|
803 "io_getevents() failed");
|
|
518
|
804 return;
|
|
|
805 }
|
|
|
806 }
|
|
|
807
|
|
|
808 #endif
|
|
|
809
|
|
|
810
|
|
48
|
811 static void *
|
|
|
812 ngx_epoll_create_conf(ngx_cycle_t *cycle)
|
|
0
|
813 {
|
|
|
814 ngx_epoll_conf_t *epcf;
|
|
|
815
|
|
50
|
816 epcf = ngx_palloc(cycle->pool, sizeof(ngx_epoll_conf_t));
|
|
|
817 if (epcf == NULL) {
|
|
496
|
818 return NULL;
|
|
50
|
819 }
|
|
0
|
820
|
|
|
821 epcf->events = NGX_CONF_UNSET;
|
|
640
|
822 epcf->aio_requests = NGX_CONF_UNSET;
|
|
0
|
823
|
|
|
824 return epcf;
|
|
|
825 }
|
|
|
826
|
|
|
827
|
|
48
|
828 static char *
|
|
|
829 ngx_epoll_init_conf(ngx_cycle_t *cycle, void *conf)
|
|
0
|
830 {
|
|
|
831 ngx_epoll_conf_t *epcf = conf;
|
|
|
832
|
|
212
|
833 ngx_conf_init_uint_value(epcf->events, 512);
|
|
640
|
834 ngx_conf_init_uint_value(epcf->aio_requests, 32);
|
|
0
|
835
|
|
|
836 return NGX_CONF_OK;
|
|
|
837 }
|
