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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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4 */
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5
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6
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7 #include <ngx_config.h>
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8 #include <ngx_core.h>
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9 #include <ngx_event.h>
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10
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11
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18
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12 #if (NGX_TEST_BUILD_DEVPOLL)
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0
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13
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14 /* Solaris declarations */
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15
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324
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16 #define POLLREMOVE 0x0800
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17 #define DP_POLL 0xD001
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0
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18
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19 struct dvpoll {
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20 struct pollfd *dp_fds;
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21 int dp_nfds;
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22 int dp_timeout;
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23 };
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24
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25 #endif
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26
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27
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28 typedef struct {
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324
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29 ngx_uint_t changes;
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30 ngx_uint_t events;
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0
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31 } ngx_devpoll_conf_t;
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32
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33
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112
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34 static ngx_int_t ngx_devpoll_init(ngx_cycle_t *cycle, ngx_msec_t timer);
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0
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35 static void ngx_devpoll_done(ngx_cycle_t *cycle);
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324
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36 static ngx_int_t ngx_devpoll_add_event(ngx_event_t *ev, ngx_int_t event,
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37 ngx_uint_t flags);
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38 static ngx_int_t ngx_devpoll_del_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_set_event(ngx_event_t *ev, ngx_int_t event,
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41 ngx_uint_t flags);
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112
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42 static ngx_int_t ngx_devpoll_process_events(ngx_cycle_t *cycle,
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43 ngx_msec_t timer, ngx_uint_t flags);
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0
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44
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45 static void *ngx_devpoll_create_conf(ngx_cycle_t *cycle);
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46 static char *ngx_devpoll_init_conf(ngx_cycle_t *cycle, void *conf);
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47
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48 static int dp = -1;
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49 static struct pollfd *change_list, *event_list;
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324
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50 static ngx_uint_t nchanges, max_changes, nevents;
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0
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51
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52 static ngx_event_t **change_index;
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53
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54
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55 static ngx_str_t devpoll_name = ngx_string("/dev/poll");
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56
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57 static ngx_command_t ngx_devpoll_commands[] = {
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58
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48
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59 { ngx_string("devpoll_changes"),
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60 NGX_EVENT_CONF|NGX_CONF_TAKE1,
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61 ngx_conf_set_num_slot,
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62 0,
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63 offsetof(ngx_devpoll_conf_t, changes),
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64 NULL },
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0
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65
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48
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66 { ngx_string("devpoll_events"),
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67 NGX_EVENT_CONF|NGX_CONF_TAKE1,
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68 ngx_conf_set_num_slot,
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69 0,
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70 offsetof(ngx_devpoll_conf_t, events),
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71 NULL },
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0
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72
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48
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73 ngx_null_command
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0
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74 };
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75
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76
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77 ngx_event_module_t ngx_devpoll_module_ctx = {
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78 &devpoll_name,
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79 ngx_devpoll_create_conf, /* create configuration */
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80 ngx_devpoll_init_conf, /* init configuration */
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81
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82 {
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83 ngx_devpoll_add_event, /* add an event */
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84 ngx_devpoll_del_event, /* delete an event */
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85 ngx_devpoll_add_event, /* enable an event */
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86 ngx_devpoll_del_event, /* disable an event */
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87 NULL, /* add an connection */
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88 NULL, /* delete an connection */
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89 NULL, /* process the changes */
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90 ngx_devpoll_process_events, /* process the events */
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91 ngx_devpoll_init, /* init the events */
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92 ngx_devpoll_done, /* done the events */
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93 }
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94
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95 };
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96
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97 ngx_module_t ngx_devpoll_module = {
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58
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98 NGX_MODULE_V1,
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0
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99 &ngx_devpoll_module_ctx, /* module context */
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100 ngx_devpoll_commands, /* module directives */
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101 NGX_EVENT_MODULE, /* module type */
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90
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102 NULL, /* init master */
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0
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103 NULL, /* init module */
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90
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104 NULL, /* init process */
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105 NULL, /* init thread */
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106 NULL, /* exit thread */
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107 NULL, /* exit process */
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108 NULL, /* exit master */
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109 NGX_MODULE_V1_PADDING
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0
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110 };
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111
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112
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48
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113 static ngx_int_t
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112
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114 ngx_devpoll_init(ngx_cycle_t *cycle, ngx_msec_t timer)
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0
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115 {
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116 size_t n;
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117 ngx_devpoll_conf_t *dpcf;
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118
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119 dpcf = ngx_event_get_conf(cycle->conf_ctx, ngx_devpoll_module);
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120
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121 if (dp == -1) {
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122 dp = open("/dev/poll", O_RDWR);
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123
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124 if (dp == -1) {
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125 ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
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126 "open(/dev/poll) failed");
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127 return NGX_ERROR;
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128 }
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129 }
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130
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131 if (max_changes < dpcf->changes) {
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132 if (nchanges) {
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133 n = nchanges * sizeof(struct pollfd);
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134 if (write(dp, change_list, n) != (ssize_t) n) {
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135 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
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136 "write(/dev/poll) failed");
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137 return NGX_ERROR;
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138 }
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139
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140 nchanges = 0;
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141 }
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142
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143 if (change_list) {
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144 ngx_free(change_list);
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145 }
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146
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50
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147 change_list = ngx_alloc(sizeof(struct pollfd) * dpcf->changes,
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148 cycle->log);
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149 if (change_list == NULL) {
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150 return NGX_ERROR;
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151 }
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0
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152
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153 if (change_index) {
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154 ngx_free(change_index);
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155 }
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156
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50
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157 change_index = ngx_alloc(sizeof(ngx_event_t *) * dpcf->changes,
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158 cycle->log);
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159 if (change_index == NULL) {
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160 return NGX_ERROR;
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161 }
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0
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162 }
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163
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164 max_changes = dpcf->changes;
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165
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166 if (nevents < dpcf->events) {
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167 if (event_list) {
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168 ngx_free(event_list);
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169 }
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170
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50
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171 event_list = ngx_alloc(sizeof(struct pollfd) * dpcf->events,
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172 cycle->log);
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173 if (event_list == NULL) {
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174 return NGX_ERROR;
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175 }
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0
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176 }
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177
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178 nevents = dpcf->events;
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179
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180 ngx_io = ngx_os_io;
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181
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182 ngx_event_actions = ngx_devpoll_module_ctx.actions;
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183
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92
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184 ngx_event_flags = NGX_USE_LEVEL_EVENT|NGX_USE_FD_EVENT;
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0
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185
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186 return NGX_OK;
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187 }
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188
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189
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48
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190 static void
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191 ngx_devpoll_done(ngx_cycle_t *cycle)
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0
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192 {
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193 if (close(dp) == -1) {
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194 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
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195 "close(/dev/poll) failed");
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196 }
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197
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198 dp = -1;
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199
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200 ngx_free(change_list);
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201 ngx_free(event_list);
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202 ngx_free(change_index);
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203
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204 change_list = NULL;
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205 event_list = NULL;
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206 change_index = NULL;
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207 max_changes = 0;
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208 nchanges = 0;
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209 nevents = 0;
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210 }
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211
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212
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48
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213 static ngx_int_t
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324
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214 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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215 {
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216 #if (NGX_DEBUG)
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217 ngx_connection_t *c;
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218 #endif
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219
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220 #if (NGX_READ_EVENT != POLLIN)
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2
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221 event = (event == NGX_READ_EVENT) ? POLLIN : POLLOUT;
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0
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222 #endif
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223
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224 #if (NGX_DEBUG)
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225 c = ev->data;
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226 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, ev->log, 0,
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324
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227 "devpoll add event: fd:%d ev:%04Xi", c->fd, event);
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0
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228 #endif
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229
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230 ev->active = 1;
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2
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231
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0
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232 return ngx_devpoll_set_event(ev, event, 0);
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233 }
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234
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235
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48
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236 static ngx_int_t
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324
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237 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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238 {
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239 ngx_event_t *e;
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240 ngx_connection_t *c;
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241
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242 c = ev->data;
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243
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2
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244 #if (NGX_READ_EVENT != POLLIN)
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245 event = (event == NGX_READ_EVENT) ? POLLIN : POLLOUT;
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246 #endif
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247
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0
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248 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, ev->log, 0,
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324
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249 "devpoll del event: fd:%d ev:%04Xi", c->fd, event);
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0
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250
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251 if (ngx_devpoll_set_event(ev, POLLREMOVE, flags) == NGX_ERROR) {
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252 return NGX_ERROR;
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253 }
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254
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255 ev->active = 0;
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256
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257 if (flags & NGX_CLOSE_EVENT) {
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258 return NGX_OK;
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259 }
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260
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2
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261 /* restore the paired event if it exists */
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0
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262
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2
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263 if (event == POLLIN) {
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0
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264 e = c->write;
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265 event = POLLOUT;
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266
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267 } else {
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268 e = c->read;
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269 event = POLLIN;
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270 }
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271
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2
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272 if (e && e->active) {
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0
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273 return ngx_devpoll_set_event(e, event, 0);
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274 }
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275
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276 return NGX_OK;
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277 }
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278
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279
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48
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280 static ngx_int_t
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324
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281 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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282 {
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283 size_t n;
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284 ngx_connection_t *c;
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285
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286 c = ev->data;
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287
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288 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, ev->log, 0,
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324
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289 "devpoll fd:%d ev:%04Xi fl:%04Xi", c->fd, event, flags);
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0
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290
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291 if (nchanges >= max_changes) {
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292 ngx_log_error(NGX_LOG_WARN, ev->log, 0,
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293 "/dev/pool change list is filled up");
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294
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295 n = nchanges * sizeof(struct pollfd);
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296 if (write(dp, change_list, n) != (ssize_t) n) {
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297 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno,
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298 "write(/dev/poll) failed");
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299 return NGX_ERROR;
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300 }
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301
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302 nchanges = 0;
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303 }
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304
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305 change_list[nchanges].fd = c->fd;
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324
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306 change_list[nchanges].events = (short) event;
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0
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307 change_list[nchanges].revents = 0;
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308
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309 change_index[nchanges] = ev;
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310 ev->index = nchanges;
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311
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312 nchanges++;
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313
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314 if (flags & NGX_CLOSE_EVENT) {
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315 n = nchanges * sizeof(struct pollfd);
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316 if (write(dp, change_list, n) != (ssize_t) n) {
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317 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno,
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318 "write(/dev/poll) failed");
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319 return NGX_ERROR;
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320 }
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321
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322 nchanges = 0;
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323 }
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324
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325 return NGX_OK;
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326 }
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327
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328
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48
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329 ngx_int_t
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112
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330 ngx_devpoll_process_events(ngx_cycle_t *cycle, ngx_msec_t timer,
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331 ngx_uint_t flags)
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0
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332 {
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32
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333 int events, revents;
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106
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334 size_t n;
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335 ngx_err_t err;
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0
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336 ngx_int_t i;
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112
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337 ngx_uint_t level;
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338 ngx_event_t *rev, *wev, **queue;
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0
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339 ngx_connection_t *c;
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340 struct dvpoll dvp;
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341
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342 /* NGX_TIMER_INFINITE == INFTIM */
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343
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344 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
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106
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345 "devpoll timer: %M", timer);
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0
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346
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347 if (nchanges) {
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348 n = nchanges * sizeof(struct pollfd);
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349 if (write(dp, change_list, n) != (ssize_t) n) {
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350 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
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351 "write(/dev/poll) failed");
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352 return NGX_ERROR;
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353 }
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116
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354
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355 nchanges = 0;
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0
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356 }
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357
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358 dvp.dp_fds = event_list;
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324
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359 dvp.dp_nfds = (int) nevents;
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0
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360 dvp.dp_timeout = timer;
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361 events = ioctl(dp, DP_POLL, &dvp);
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362
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363 if (events == -1) {
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364 err = ngx_errno;
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365 } else {
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366 err = 0;
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367 }
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368
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112
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369 if (flags & NGX_UPDATE_TIME) {
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370 ngx_time_update(0, 0);
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371 }
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0
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372
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373 if (err) {
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112
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374 if (err == NGX_EINTR) {
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375
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376 if (ngx_event_timer_alarm) {
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377 ngx_event_timer_alarm = 0;
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378 return NGX_OK;
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379 }
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126
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380
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112
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381 level = NGX_LOG_INFO;
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126
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382
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383 } else {
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112
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384 level = NGX_LOG_ALERT;
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385 }
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386
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387 ngx_log_error(level, cycle->log, err, "ioctl(DP_POLL) failed");
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0
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388 return NGX_ERROR;
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389 }
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390
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116
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391 if (events == 0) {
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392 if (timer != NGX_TIMER_INFINITE) {
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393 return NGX_OK;
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394 }
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0
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395
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116
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396 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
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397 "ioctl(DP_POLL) returned no events without timeout");
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398 return NGX_ERROR;
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0
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399 }
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400
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112
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401 ngx_mutex_lock(ngx_posted_events_mutex);
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0
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402
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403 for (i = 0; i < events; i++) {
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92
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404 c = ngx_cycle->files[event_list[i].fd];
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0
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405
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406 if (c->fd == -1) {
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92
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407 if (c->read->closed) {
|
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22
|
408 continue;
|
|
|
409 }
|
|
|
410
|
|
|
411 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0, "unexpected event");
|
|
|
412 continue;
|
|
|
413 }
|
|
|
414
|
|
32
|
415 revents = event_list[i].revents;
|
|
|
416
|
|
0
|
417 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
|
|
10
|
418 "devpoll: fd:%d, ev:%04Xd, rev:%04Xd",
|
|
32
|
419 event_list[i].fd, event_list[i].events, revents);
|
|
0
|
420
|
|
32
|
421 if (revents & (POLLERR|POLLHUP|POLLNVAL)) {
|
|
292
|
422 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
|
|
10
|
423 "ioctl(DP_POLL) error fd:%d ev:%04Xd rev:%04Xd",
|
|
32
|
424 event_list[i].fd, event_list[i].events, revents);
|
|
0
|
425 }
|
|
|
426
|
|
32
|
427 if (revents & ~(POLLIN|POLLOUT|POLLERR|POLLHUP|POLLNVAL)) {
|
|
0
|
428 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
|
|
|
429 "strange ioctl(DP_POLL) events "
|
|
10
|
430 "fd:%d ev:%04Xd rev:%04Xd",
|
|
32
|
431 event_list[i].fd, event_list[i].events, revents);
|
|
|
432 }
|
|
|
433
|
|
|
434 if ((revents & (POLLERR|POLLHUP|POLLNVAL))
|
|
|
435 && (revents & (POLLIN|POLLOUT)) == 0)
|
|
|
436 {
|
|
|
437 /*
|
|
|
438 * if the error events were returned without POLLIN or POLLOUT,
|
|
|
439 * then add these flags to handle the events at least in one
|
|
126
|
440 * active handler
|
|
32
|
441 */
|
|
|
442
|
|
|
443 revents |= POLLIN|POLLOUT;
|
|
0
|
444 }
|
|
|
445
|
|
|
446 rev = c->read;
|
|
|
447
|
|
32
|
448 if ((revents & POLLIN) && rev->active) {
|
|
0
|
449
|
|
112
|
450 if ((flags & NGX_POST_THREAD_EVENTS) && !rev->accept) {
|
|
|
451 rev->posted_ready = 1;
|
|
0
|
452
|
|
112
|
453 } else {
|
|
|
454 rev->ready = 1;
|
|
|
455 }
|
|
0
|
456
|
|
112
|
457 if (flags & NGX_POST_EVENTS) {
|
|
|
458 queue = (ngx_event_t **) (rev->accept ?
|
|
|
459 &ngx_posted_accept_events : &ngx_posted_events);
|
|
0
|
460
|
|
112
|
461 ngx_locked_post_event(rev, queue);
|
|
0
|
462
|
|
112
|
463 } else {
|
|
|
464 rev->handler(rev);
|
|
|
465 }
|
|
|
466 }
|
|
|
467
|
|
|
468 wev = c->write;
|
|
|
469
|
|
|
470 if ((revents & POLLOUT) && wev->active) {
|
|
0
|
471
|
|
112
|
472 if (flags & NGX_POST_THREAD_EVENTS) {
|
|
|
473 wev->posted_ready = 1;
|
|
0
|
474
|
|
112
|
475 } else {
|
|
|
476 wev->ready = 1;
|
|
|
477 }
|
|
|
478
|
|
|
479 if (flags & NGX_POST_EVENTS) {
|
|
|
480 ngx_locked_post_event(wev, &ngx_posted_events);
|
|
|
481
|
|
|
482 } else {
|
|
|
483 wev->handler(wev);
|
|
0
|
484 }
|
|
|
485 }
|
|
|
486 }
|
|
|
487
|
|
112
|
488 ngx_mutex_unlock(ngx_posted_events_mutex);
|
|
0
|
489
|
|
|
490 return NGX_OK;
|
|
|
491 }
|
|
|
492
|
|
|
493
|
|
48
|
494 static void *
|
|
|
495 ngx_devpoll_create_conf(ngx_cycle_t *cycle)
|
|
0
|
496 {
|
|
|
497 ngx_devpoll_conf_t *dpcf;
|
|
|
498
|
|
50
|
499 dpcf = ngx_palloc(cycle->pool, sizeof(ngx_devpoll_conf_t));
|
|
|
500 if (dpcf == NULL) {
|
|
|
501 return NGX_CONF_ERROR;
|
|
|
502 }
|
|
0
|
503
|
|
|
504 dpcf->changes = NGX_CONF_UNSET;
|
|
|
505 dpcf->events = NGX_CONF_UNSET;
|
|
|
506
|
|
|
507 return dpcf;
|
|
|
508 }
|
|
|
509
|
|
|
510
|
|
48
|
511 static char *
|
|
|
512 ngx_devpoll_init_conf(ngx_cycle_t *cycle, void *conf)
|
|
0
|
513 {
|
|
|
514 ngx_devpoll_conf_t *dpcf = conf;
|
|
|
515
|
|
212
|
516 ngx_conf_init_uint_value(dpcf->changes, 32);
|
|
|
517 ngx_conf_init_uint_value(dpcf->events, 32);
|
|
0
|
518
|
|
|
519 return NGX_CONF_OK;
|
|
|
520 }
|
