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