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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_DEVPOLL)
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0
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14
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15 /* Solaris declarations */
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16
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332
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17 #define POLLREMOVE 0x0800
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18 #define DP_POLL 0xD001
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19 #define DP_ISPOLLED 0xD002
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0
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20
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21 struct dvpoll {
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22 struct pollfd *dp_fds;
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23 int dp_nfds;
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24 int dp_timeout;
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25 };
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26
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27 #endif
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28
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29
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30 typedef struct {
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324
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31 ngx_uint_t changes;
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32 ngx_uint_t events;
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0
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33 } ngx_devpoll_conf_t;
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34
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35
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112
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36 static ngx_int_t ngx_devpoll_init(ngx_cycle_t *cycle, ngx_msec_t timer);
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0
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37 static void ngx_devpoll_done(ngx_cycle_t *cycle);
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324
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38 static ngx_int_t ngx_devpoll_add_event(ngx_event_t *ev, ngx_int_t event,
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39 ngx_uint_t flags);
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40 static ngx_int_t ngx_devpoll_del_event(ngx_event_t *ev, ngx_int_t event,
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41 ngx_uint_t flags);
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42 static ngx_int_t ngx_devpoll_set_event(ngx_event_t *ev, ngx_int_t event,
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43 ngx_uint_t flags);
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112
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44 static ngx_int_t ngx_devpoll_process_events(ngx_cycle_t *cycle,
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45 ngx_msec_t timer, ngx_uint_t flags);
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0
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46
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47 static void *ngx_devpoll_create_conf(ngx_cycle_t *cycle);
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48 static char *ngx_devpoll_init_conf(ngx_cycle_t *cycle, void *conf);
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49
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50 static int dp = -1;
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51 static struct pollfd *change_list, *event_list;
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324
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52 static ngx_uint_t nchanges, max_changes, nevents;
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0
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53
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54 static ngx_event_t **change_index;
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55
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56
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57 static ngx_str_t devpoll_name = ngx_string("/dev/poll");
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58
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59 static ngx_command_t ngx_devpoll_commands[] = {
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60
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48
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61 { ngx_string("devpoll_changes"),
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62 NGX_EVENT_CONF|NGX_CONF_TAKE1,
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63 ngx_conf_set_num_slot,
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64 0,
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65 offsetof(ngx_devpoll_conf_t, changes),
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66 NULL },
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0
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67
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48
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68 { ngx_string("devpoll_events"),
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69 NGX_EVENT_CONF|NGX_CONF_TAKE1,
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70 ngx_conf_set_num_slot,
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71 0,
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72 offsetof(ngx_devpoll_conf_t, events),
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73 NULL },
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0
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74
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48
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75 ngx_null_command
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0
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76 };
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77
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78
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79 ngx_event_module_t ngx_devpoll_module_ctx = {
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80 &devpoll_name,
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81 ngx_devpoll_create_conf, /* create configuration */
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82 ngx_devpoll_init_conf, /* init configuration */
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83
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84 {
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85 ngx_devpoll_add_event, /* add an event */
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86 ngx_devpoll_del_event, /* delete an event */
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87 ngx_devpoll_add_event, /* enable an event */
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88 ngx_devpoll_del_event, /* disable an event */
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89 NULL, /* add an connection */
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90 NULL, /* delete an connection */
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91 NULL, /* process the changes */
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92 ngx_devpoll_process_events, /* process the events */
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93 ngx_devpoll_init, /* init the events */
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94 ngx_devpoll_done, /* done the events */
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95 }
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96
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97 };
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98
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99 ngx_module_t ngx_devpoll_module = {
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58
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100 NGX_MODULE_V1,
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0
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101 &ngx_devpoll_module_ctx, /* module context */
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102 ngx_devpoll_commands, /* module directives */
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103 NGX_EVENT_MODULE, /* module type */
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90
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104 NULL, /* init master */
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0
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105 NULL, /* init module */
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90
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106 NULL, /* init process */
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107 NULL, /* init thread */
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108 NULL, /* exit thread */
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109 NULL, /* exit process */
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110 NULL, /* exit master */
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111 NGX_MODULE_V1_PADDING
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0
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112 };
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113
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114
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48
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115 static ngx_int_t
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112
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116 ngx_devpoll_init(ngx_cycle_t *cycle, ngx_msec_t timer)
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0
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117 {
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118 size_t n;
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119 ngx_devpoll_conf_t *dpcf;
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120
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121 dpcf = ngx_event_get_conf(cycle->conf_ctx, ngx_devpoll_module);
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122
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123 if (dp == -1) {
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124 dp = open("/dev/poll", O_RDWR);
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125
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126 if (dp == -1) {
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127 ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
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128 "open(/dev/poll) failed");
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129 return NGX_ERROR;
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130 }
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131 }
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132
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133 if (max_changes < dpcf->changes) {
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134 if (nchanges) {
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135 n = nchanges * sizeof(struct pollfd);
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136 if (write(dp, change_list, n) != (ssize_t) n) {
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137 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
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138 "write(/dev/poll) failed");
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139 return NGX_ERROR;
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140 }
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141
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142 nchanges = 0;
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143 }
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144
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145 if (change_list) {
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146 ngx_free(change_list);
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147 }
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148
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50
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149 change_list = ngx_alloc(sizeof(struct pollfd) * dpcf->changes,
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150 cycle->log);
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151 if (change_list == NULL) {
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152 return NGX_ERROR;
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153 }
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0
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154
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155 if (change_index) {
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156 ngx_free(change_index);
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157 }
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158
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50
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159 change_index = ngx_alloc(sizeof(ngx_event_t *) * dpcf->changes,
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160 cycle->log);
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161 if (change_index == NULL) {
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162 return NGX_ERROR;
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163 }
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0
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164 }
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165
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166 max_changes = dpcf->changes;
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167
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168 if (nevents < dpcf->events) {
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169 if (event_list) {
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170 ngx_free(event_list);
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171 }
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172
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50
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173 event_list = ngx_alloc(sizeof(struct pollfd) * dpcf->events,
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174 cycle->log);
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175 if (event_list == NULL) {
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176 return NGX_ERROR;
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177 }
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0
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178 }
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179
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180 nevents = dpcf->events;
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181
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182 ngx_io = ngx_os_io;
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183
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184 ngx_event_actions = ngx_devpoll_module_ctx.actions;
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185
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92
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186 ngx_event_flags = NGX_USE_LEVEL_EVENT|NGX_USE_FD_EVENT;
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0
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187
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188 return NGX_OK;
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189 }
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190
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191
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48
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192 static void
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193 ngx_devpoll_done(ngx_cycle_t *cycle)
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0
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194 {
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195 if (close(dp) == -1) {
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196 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
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197 "close(/dev/poll) failed");
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198 }
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199
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200 dp = -1;
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201
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202 ngx_free(change_list);
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203 ngx_free(event_list);
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204 ngx_free(change_index);
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205
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206 change_list = NULL;
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207 event_list = NULL;
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208 change_index = NULL;
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209 max_changes = 0;
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210 nchanges = 0;
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211 nevents = 0;
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212 }
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213
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214
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48
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215 static ngx_int_t
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324
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216 ngx_devpoll_add_event(ngx_event_t *ev, ngx_int_t event, ngx_uint_t flags)
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0
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217 {
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218 #if (NGX_DEBUG)
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219 ngx_connection_t *c;
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220 #endif
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221
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222 #if (NGX_READ_EVENT != POLLIN)
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2
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223 event = (event == NGX_READ_EVENT) ? POLLIN : POLLOUT;
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0
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224 #endif
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225
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226 #if (NGX_DEBUG)
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227 c = ev->data;
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228 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, ev->log, 0,
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324
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229 "devpoll add event: fd:%d ev:%04Xi", c->fd, event);
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0
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230 #endif
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231
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232 ev->active = 1;
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2
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233
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0
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234 return ngx_devpoll_set_event(ev, event, 0);
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235 }
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236
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237
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48
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238 static ngx_int_t
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324
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239 ngx_devpoll_del_event(ngx_event_t *ev, ngx_int_t event, ngx_uint_t flags)
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0
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240 {
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241 ngx_event_t *e;
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242 ngx_connection_t *c;
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243
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244 c = ev->data;
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245
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2
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246 #if (NGX_READ_EVENT != POLLIN)
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247 event = (event == NGX_READ_EVENT) ? POLLIN : POLLOUT;
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248 #endif
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249
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0
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250 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, ev->log, 0,
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324
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251 "devpoll del event: fd:%d ev:%04Xi", c->fd, event);
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0
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252
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253 if (ngx_devpoll_set_event(ev, POLLREMOVE, flags) == NGX_ERROR) {
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254 return NGX_ERROR;
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255 }
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256
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257 ev->active = 0;
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258
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259 if (flags & NGX_CLOSE_EVENT) {
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332
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260 e = (event == POLLIN) ? c->write : c->read;
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261
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262 if (e) {
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263 e->active = 0;
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264 }
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265
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0
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266 return NGX_OK;
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267 }
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268
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332
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269 /* restore the pair event if it exists */
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0
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270
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2
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271 if (event == POLLIN) {
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0
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272 e = c->write;
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273 event = POLLOUT;
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274
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275 } else {
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276 e = c->read;
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277 event = POLLIN;
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278 }
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279
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2
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280 if (e && e->active) {
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0
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281 return ngx_devpoll_set_event(e, event, 0);
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282 }
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283
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284 return NGX_OK;
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285 }
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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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324
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289 ngx_devpoll_set_event(ngx_event_t *ev, ngx_int_t event, ngx_uint_t flags)
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0
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290 {
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291 size_t n;
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292 ngx_connection_t *c;
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293
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294 c = ev->data;
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295
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296 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, ev->log, 0,
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324
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297 "devpoll fd:%d ev:%04Xi fl:%04Xi", c->fd, event, flags);
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0
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298
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299 if (nchanges >= max_changes) {
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300 ngx_log_error(NGX_LOG_WARN, ev->log, 0,
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301 "/dev/pool change list is filled up");
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302
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303 n = nchanges * sizeof(struct pollfd);
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304 if (write(dp, change_list, n) != (ssize_t) n) {
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305 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno,
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306 "write(/dev/poll) failed");
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307 return NGX_ERROR;
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308 }
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309
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310 nchanges = 0;
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311 }
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312
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313 change_list[nchanges].fd = c->fd;
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324
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314 change_list[nchanges].events = (short) event;
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0
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315 change_list[nchanges].revents = 0;
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316
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317 change_index[nchanges] = ev;
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318 ev->index = nchanges;
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319
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320 nchanges++;
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321
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322 if (flags & NGX_CLOSE_EVENT) {
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323 n = nchanges * sizeof(struct pollfd);
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324 if (write(dp, change_list, n) != (ssize_t) n) {
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325 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno,
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326 "write(/dev/poll) failed");
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327 return NGX_ERROR;
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328 }
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329
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330 nchanges = 0;
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331 }
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332
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333 return NGX_OK;
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334 }
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335
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336
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48
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337 ngx_int_t
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112
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338 ngx_devpoll_process_events(ngx_cycle_t *cycle, ngx_msec_t timer,
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339 ngx_uint_t flags)
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0
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340 {
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332
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341 int events, revents, rc;
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106
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342 size_t n;
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332
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343 ngx_fd_t fd;
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106
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344 ngx_err_t err;
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0
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345 ngx_int_t i;
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112
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346 ngx_uint_t level;
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347 ngx_event_t *rev, *wev, **queue;
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0
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348 ngx_connection_t *c;
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332
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349 struct pollfd pfd;
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0
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350 struct dvpoll dvp;
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351
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352 /* NGX_TIMER_INFINITE == INFTIM */
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353
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354 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
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106
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355 "devpoll timer: %M", timer);
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0
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356
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357 if (nchanges) {
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358 n = nchanges * sizeof(struct pollfd);
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359 if (write(dp, change_list, n) != (ssize_t) n) {
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360 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
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361 "write(/dev/poll) failed");
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362 return NGX_ERROR;
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363 }
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116
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364
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365 nchanges = 0;
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0
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366 }
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367
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368 dvp.dp_fds = event_list;
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324
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369 dvp.dp_nfds = (int) nevents;
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0
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370 dvp.dp_timeout = timer;
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371 events = ioctl(dp, DP_POLL, &dvp);
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372
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518
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373 err = (events == -1) ? ngx_errno : 0;
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0
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374
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566
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375 if (flags & NGX_UPDATE_TIME || ngx_event_timer_alarm) {
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376 ngx_time_update();
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112
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377 }
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0
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378
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379 if (err) {
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112
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380 if (err == NGX_EINTR) {
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381
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382 if (ngx_event_timer_alarm) {
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383 ngx_event_timer_alarm = 0;
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384 return NGX_OK;
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385 }
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126
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386
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112
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387 level = NGX_LOG_INFO;
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126
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388
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389 } else {
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112
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390 level = NGX_LOG_ALERT;
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391 }
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392
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393 ngx_log_error(level, cycle->log, err, "ioctl(DP_POLL) failed");
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0
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394 return NGX_ERROR;
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395 }
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396
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116
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397 if (events == 0) {
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398 if (timer != NGX_TIMER_INFINITE) {
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399 return NGX_OK;
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400 }
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0
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401
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116
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402 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
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403 "ioctl(DP_POLL) returned no events without timeout");
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404 return NGX_ERROR;
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0
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405 }
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406
|
|
112
|
407 ngx_mutex_lock(ngx_posted_events_mutex);
|
|
0
|
408
|
|
|
409 for (i = 0; i < events; i++) {
|
|
332
|
410
|
|
|
411 fd = event_list[i].fd;
|
|
|
412 revents = event_list[i].revents;
|
|
|
413
|
|
|
414 c = ngx_cycle->files[fd];
|
|
|
415
|
|
|
416 if (c == NULL || c->fd == -1) {
|
|
|
417
|
|
|
418 pfd.fd = fd;
|
|
|
419 pfd.events = 0;
|
|
|
420 pfd.revents = 0;
|
|
|
421
|
|
|
422 rc = ioctl(dp, DP_ISPOLLED, &pfd);
|
|
|
423
|
|
|
424 switch (rc) {
|
|
|
425
|
|
|
426 case -1:
|
|
|
427 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
|
|
|
428 "ioctl(DP_ISPOLLED) failed for socket %d, event",
|
|
|
429 fd, revents);
|
|
|
430 break;
|
|
0
|
431
|
|
332
|
432 case 0:
|
|
|
433 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
|
|
|
434 "phantom event %04Xd for closed and removed socket %d",
|
|
|
435 revents, fd);
|
|
|
436 break;
|
|
|
437
|
|
|
438 default:
|
|
|
439 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
|
|
|
440 "unexpected event %04Xd for closed and removed socket %d, ",
|
|
|
441 "ioctl(DP_ISPOLLED) returned rc:%d, fd:%d, event %04Xd",
|
|
|
442 revents, fd, rc, pfd.fd, pfd.revents);
|
|
|
443
|
|
|
444 pfd.fd = fd;
|
|
|
445 pfd.events = POLLREMOVE;
|
|
|
446 pfd.revents = 0;
|
|
|
447
|
|
|
448 if (write(dp, &pfd, sizeof(struct pollfd))
|
|
|
449 != (ssize_t) sizeof(struct pollfd))
|
|
|
450 {
|
|
|
451 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
|
|
|
452 "write(/dev/poll) for %d failed, fd");
|
|
|
453 }
|
|
|
454
|
|
|
455 if (close(fd) == -1) {
|
|
|
456 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
|
|
|
457 "close(%d) failed", fd);
|
|
|
458 }
|
|
|
459
|
|
|
460 break;
|
|
22
|
461 }
|
|
|
462
|
|
|
463 continue;
|
|
|
464 }
|
|
|
465
|
|
0
|
466 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
|
|
10
|
467 "devpoll: fd:%d, ev:%04Xd, rev:%04Xd",
|
|
332
|
468 fd, event_list[i].events, revents);
|
|
0
|
469
|
|
32
|
470 if (revents & (POLLERR|POLLHUP|POLLNVAL)) {
|
|
292
|
471 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
|
|
10
|
472 "ioctl(DP_POLL) error fd:%d ev:%04Xd rev:%04Xd",
|
|
332
|
473 fd, event_list[i].events, revents);
|
|
0
|
474 }
|
|
|
475
|
|
32
|
476 if (revents & ~(POLLIN|POLLOUT|POLLERR|POLLHUP|POLLNVAL)) {
|
|
0
|
477 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
|
|
|
478 "strange ioctl(DP_POLL) events "
|
|
10
|
479 "fd:%d ev:%04Xd rev:%04Xd",
|
|
332
|
480 fd, event_list[i].events, revents);
|
|
32
|
481 }
|
|
|
482
|
|
|
483 if ((revents & (POLLERR|POLLHUP|POLLNVAL))
|
|
|
484 && (revents & (POLLIN|POLLOUT)) == 0)
|
|
|
485 {
|
|
|
486 /*
|
|
|
487 * if the error events were returned without POLLIN or POLLOUT,
|
|
|
488 * then add these flags to handle the events at least in one
|
|
126
|
489 * active handler
|
|
32
|
490 */
|
|
|
491
|
|
|
492 revents |= POLLIN|POLLOUT;
|
|
0
|
493 }
|
|
|
494
|
|
|
495 rev = c->read;
|
|
|
496
|
|
32
|
497 if ((revents & POLLIN) && rev->active) {
|
|
0
|
498
|
|
112
|
499 if ((flags & NGX_POST_THREAD_EVENTS) && !rev->accept) {
|
|
|
500 rev->posted_ready = 1;
|
|
0
|
501
|
|
112
|
502 } else {
|
|
|
503 rev->ready = 1;
|
|
|
504 }
|
|
0
|
505
|
|
112
|
506 if (flags & NGX_POST_EVENTS) {
|
|
|
507 queue = (ngx_event_t **) (rev->accept ?
|
|
|
508 &ngx_posted_accept_events : &ngx_posted_events);
|
|
0
|
509
|
|
112
|
510 ngx_locked_post_event(rev, queue);
|
|
0
|
511
|
|
112
|
512 } else {
|
|
|
513 rev->handler(rev);
|
|
|
514 }
|
|
|
515 }
|
|
|
516
|
|
|
517 wev = c->write;
|
|
|
518
|
|
|
519 if ((revents & POLLOUT) && wev->active) {
|
|
0
|
520
|
|
112
|
521 if (flags & NGX_POST_THREAD_EVENTS) {
|
|
|
522 wev->posted_ready = 1;
|
|
0
|
523
|
|
112
|
524 } else {
|
|
|
525 wev->ready = 1;
|
|
|
526 }
|
|
|
527
|
|
|
528 if (flags & NGX_POST_EVENTS) {
|
|
|
529 ngx_locked_post_event(wev, &ngx_posted_events);
|
|
|
530
|
|
|
531 } else {
|
|
|
532 wev->handler(wev);
|
|
0
|
533 }
|
|
|
534 }
|
|
|
535 }
|
|
|
536
|
|
112
|
537 ngx_mutex_unlock(ngx_posted_events_mutex);
|
|
0
|
538
|
|
|
539 return NGX_OK;
|
|
|
540 }
|
|
|
541
|
|
|
542
|
|
48
|
543 static void *
|
|
|
544 ngx_devpoll_create_conf(ngx_cycle_t *cycle)
|
|
0
|
545 {
|
|
|
546 ngx_devpoll_conf_t *dpcf;
|
|
|
547
|
|
50
|
548 dpcf = ngx_palloc(cycle->pool, sizeof(ngx_devpoll_conf_t));
|
|
|
549 if (dpcf == NULL) {
|
|
496
|
550 return NULL;
|
|
50
|
551 }
|
|
0
|
552
|
|
|
553 dpcf->changes = NGX_CONF_UNSET;
|
|
|
554 dpcf->events = NGX_CONF_UNSET;
|
|
|
555
|
|
|
556 return dpcf;
|
|
|
557 }
|
|
|
558
|
|
|
559
|
|
48
|
560 static char *
|
|
|
561 ngx_devpoll_init_conf(ngx_cycle_t *cycle, void *conf)
|
|
0
|
562 {
|
|
|
563 ngx_devpoll_conf_t *dpcf = conf;
|
|
|
564
|
|
212
|
565 ngx_conf_init_uint_value(dpcf->changes, 32);
|
|
|
566 ngx_conf_init_uint_value(dpcf->events, 32);
|
|
0
|
567
|
|
|
568 return NGX_CONF_OK;
|
|
|
569 }
|
