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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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324
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18 #define DP_ISPOLLED 0xD002
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0
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19
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20 struct dvpoll {
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21 struct pollfd *dp_fds;
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22 int dp_nfds;
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23 int dp_timeout;
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24 };
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25
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26 #endif
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27
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28
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29 typedef struct {
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30 u_int changes;
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31 u_int events;
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32 } ngx_devpoll_conf_t;
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33
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34
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112
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35 static ngx_int_t ngx_devpoll_init(ngx_cycle_t *cycle, ngx_msec_t timer);
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0
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36 static void ngx_devpoll_done(ngx_cycle_t *cycle);
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48
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37 static ngx_int_t ngx_devpoll_add_event(ngx_event_t *ev, int event, u_int flags);
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38 static ngx_int_t ngx_devpoll_del_event(ngx_event_t *ev, int event, u_int flags);
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39 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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40 static ngx_int_t ngx_devpoll_process_events(ngx_cycle_t *cycle,
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41 ngx_msec_t timer, ngx_uint_t flags);
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0
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42
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43 static void *ngx_devpoll_create_conf(ngx_cycle_t *cycle);
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44 static char *ngx_devpoll_init_conf(ngx_cycle_t *cycle, void *conf);
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45
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46 static int dp = -1;
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47 static struct pollfd *change_list, *event_list;
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48 static u_int nchanges, max_changes, nevents;
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49
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50 static ngx_event_t **change_index;
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51
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52
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53 static ngx_str_t devpoll_name = ngx_string("/dev/poll");
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54
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55 static ngx_command_t ngx_devpoll_commands[] = {
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56
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48
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57 { ngx_string("devpoll_changes"),
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58 NGX_EVENT_CONF|NGX_CONF_TAKE1,
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59 ngx_conf_set_num_slot,
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60 0,
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61 offsetof(ngx_devpoll_conf_t, changes),
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62 NULL },
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0
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63
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48
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64 { ngx_string("devpoll_events"),
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65 NGX_EVENT_CONF|NGX_CONF_TAKE1,
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66 ngx_conf_set_num_slot,
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67 0,
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68 offsetof(ngx_devpoll_conf_t, events),
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69 NULL },
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0
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70
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48
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71 ngx_null_command
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0
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72 };
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73
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74
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75 ngx_event_module_t ngx_devpoll_module_ctx = {
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76 &devpoll_name,
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77 ngx_devpoll_create_conf, /* create configuration */
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78 ngx_devpoll_init_conf, /* init configuration */
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79
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80 {
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81 ngx_devpoll_add_event, /* add an event */
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82 ngx_devpoll_del_event, /* delete an event */
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83 ngx_devpoll_add_event, /* enable an event */
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84 ngx_devpoll_del_event, /* disable an event */
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85 NULL, /* add an connection */
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86 NULL, /* delete an connection */
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87 NULL, /* process the changes */
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88 ngx_devpoll_process_events, /* process the events */
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89 ngx_devpoll_init, /* init the events */
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90 ngx_devpoll_done, /* done the events */
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91 }
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92
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93 };
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94
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95 ngx_module_t ngx_devpoll_module = {
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58
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96 NGX_MODULE_V1,
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0
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97 &ngx_devpoll_module_ctx, /* module context */
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98 ngx_devpoll_commands, /* module directives */
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99 NGX_EVENT_MODULE, /* module type */
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90
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100 NULL, /* init master */
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0
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101 NULL, /* init module */
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90
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102 NULL, /* init process */
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103 NULL, /* init thread */
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104 NULL, /* exit thread */
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105 NULL, /* exit process */
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106 NULL, /* exit master */
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107 NGX_MODULE_V1_PADDING
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0
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108 };
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109
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110
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48
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111 static ngx_int_t
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112
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112 ngx_devpoll_init(ngx_cycle_t *cycle, ngx_msec_t timer)
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0
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113 {
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114 size_t n;
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115 ngx_devpoll_conf_t *dpcf;
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116
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117 dpcf = ngx_event_get_conf(cycle->conf_ctx, ngx_devpoll_module);
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118
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119 if (dp == -1) {
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120 dp = open("/dev/poll", O_RDWR);
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121
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122 if (dp == -1) {
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123 ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
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124 "open(/dev/poll) failed");
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125 return NGX_ERROR;
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126 }
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127 }
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128
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129 if (max_changes < dpcf->changes) {
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130 if (nchanges) {
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131 n = nchanges * sizeof(struct pollfd);
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132 if (write(dp, change_list, n) != (ssize_t) n) {
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133 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
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134 "write(/dev/poll) failed");
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135 return NGX_ERROR;
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136 }
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137
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138 nchanges = 0;
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139 }
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140
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141 if (change_list) {
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142 ngx_free(change_list);
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143 }
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144
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50
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145 change_list = ngx_alloc(sizeof(struct pollfd) * dpcf->changes,
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146 cycle->log);
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147 if (change_list == NULL) {
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148 return NGX_ERROR;
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149 }
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0
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150
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151 if (change_index) {
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152 ngx_free(change_index);
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153 }
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154
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50
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155 change_index = ngx_alloc(sizeof(ngx_event_t *) * dpcf->changes,
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156 cycle->log);
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157 if (change_index == NULL) {
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158 return NGX_ERROR;
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159 }
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0
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160 }
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161
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162 max_changes = dpcf->changes;
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163
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164 if (nevents < dpcf->events) {
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165 if (event_list) {
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166 ngx_free(event_list);
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167 }
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168
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50
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169 event_list = ngx_alloc(sizeof(struct pollfd) * dpcf->events,
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170 cycle->log);
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171 if (event_list == NULL) {
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172 return NGX_ERROR;
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173 }
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0
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174 }
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175
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176 nevents = dpcf->events;
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177
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178 ngx_io = ngx_os_io;
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179
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180 ngx_event_actions = ngx_devpoll_module_ctx.actions;
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181
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92
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182 ngx_event_flags = NGX_USE_LEVEL_EVENT|NGX_USE_FD_EVENT;
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0
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183
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184 return NGX_OK;
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185 }
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186
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187
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48
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188 static void
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189 ngx_devpoll_done(ngx_cycle_t *cycle)
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0
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190 {
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191 if (close(dp) == -1) {
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192 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
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193 "close(/dev/poll) failed");
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194 }
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195
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196 dp = -1;
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197
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198 ngx_free(change_list);
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199 ngx_free(event_list);
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200 ngx_free(change_index);
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201
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202 change_list = NULL;
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203 event_list = NULL;
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204 change_index = NULL;
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205 max_changes = 0;
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206 nchanges = 0;
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207 nevents = 0;
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208 }
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209
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210
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48
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211 static ngx_int_t
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212 ngx_devpoll_add_event(ngx_event_t *ev, int event, u_int flags)
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0
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213 {
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214 #if (NGX_DEBUG)
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215 ngx_connection_t *c;
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216 #endif
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217
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218 #if (NGX_READ_EVENT != POLLIN)
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2
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219 event = (event == NGX_READ_EVENT) ? POLLIN : POLLOUT;
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0
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220 #endif
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221
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222 #if (NGX_DEBUG)
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223 c = ev->data;
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224 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, ev->log, 0,
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10
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225 "devpoll add event: fd:%d ev:%04Xd", c->fd, event);
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226 #endif
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227
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228 ev->active = 1;
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2
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229
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230 return ngx_devpoll_set_event(ev, event, 0);
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231 }
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232
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233
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48
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234 static ngx_int_t
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235 ngx_devpoll_del_event(ngx_event_t *ev, int event, u_int flags)
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0
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236 {
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237 ngx_event_t *e;
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238 ngx_connection_t *c;
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239
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240 c = ev->data;
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241
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2
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242 #if (NGX_READ_EVENT != POLLIN)
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243 event = (event == NGX_READ_EVENT) ? POLLIN : POLLOUT;
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244 #endif
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245
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0
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246 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, ev->log, 0,
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10
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247 "devpoll del event: fd:%d ev:%04Xd", c->fd, event);
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0
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248
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249 if (ngx_devpoll_set_event(ev, POLLREMOVE, flags) == NGX_ERROR) {
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250 return NGX_ERROR;
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251 }
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252
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253 ev->active = 0;
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254
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255 if (flags & NGX_CLOSE_EVENT) {
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324
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256 e = (event == POLLIN) ? c->write : c->read;
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257
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258 if (e) {
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259 e->active = 0;
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260 }
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261
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0
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262 return NGX_OK;
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263 }
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264
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324
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265 /* restore the pair event if it exists */
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0
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266
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2
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267 if (event == POLLIN) {
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0
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268 e = c->write;
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269 event = POLLOUT;
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270
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271 } else {
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272 e = c->read;
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273 event = POLLIN;
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274 }
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275
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2
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276 if (e && e->active) {
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0
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277 return ngx_devpoll_set_event(e, event, 0);
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278 }
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279
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280 return NGX_OK;
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281 }
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282
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283
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48
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284 static ngx_int_t
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285 ngx_devpoll_set_event(ngx_event_t *ev, int event, u_int flags)
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0
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286 {
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287 size_t n;
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288 ngx_connection_t *c;
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289
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290 c = ev->data;
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291
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292 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, ev->log, 0,
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10
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293 "devpoll fd:%d ev:%04Xd fl:%04Xd", c->fd, event, flags);
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0
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294
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295 if (nchanges >= max_changes) {
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296 ngx_log_error(NGX_LOG_WARN, ev->log, 0,
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297 "/dev/pool change list is filled up");
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298
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299 n = nchanges * sizeof(struct pollfd);
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300 if (write(dp, change_list, n) != (ssize_t) n) {
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301 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno,
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302 "write(/dev/poll) failed");
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303 return NGX_ERROR;
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304 }
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305
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306 nchanges = 0;
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307 }
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308
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309 change_list[nchanges].fd = c->fd;
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310 change_list[nchanges].events = event;
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311 change_list[nchanges].revents = 0;
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312
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313 change_index[nchanges] = ev;
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314 ev->index = nchanges;
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315
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316 nchanges++;
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317
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318 if (flags & NGX_CLOSE_EVENT) {
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319 n = nchanges * sizeof(struct pollfd);
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320 if (write(dp, change_list, n) != (ssize_t) n) {
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321 ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno,
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322 "write(/dev/poll) failed");
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323 return NGX_ERROR;
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324 }
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325
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326 nchanges = 0;
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327 }
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328
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329 return NGX_OK;
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330 }
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331
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332
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48
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333 ngx_int_t
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112
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334 ngx_devpoll_process_events(ngx_cycle_t *cycle, ngx_msec_t timer,
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335 ngx_uint_t flags)
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0
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336 {
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324
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337 int events, revents, rc;
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106
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338 size_t n;
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324
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339 ngx_fd_t fd;
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106
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340 ngx_err_t err;
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0
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341 ngx_int_t i;
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112
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342 ngx_uint_t level;
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343 ngx_event_t *rev, *wev, **queue;
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0
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344 ngx_connection_t *c;
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324
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345 struct pollfd pfd;
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0
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346 struct dvpoll dvp;
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347
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348 /* NGX_TIMER_INFINITE == INFTIM */
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349
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350 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
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106
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351 "devpoll timer: %M", timer);
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0
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352
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353 if (nchanges) {
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354 n = nchanges * sizeof(struct pollfd);
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355 if (write(dp, change_list, n) != (ssize_t) n) {
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356 ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
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357 "write(/dev/poll) failed");
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358 return NGX_ERROR;
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359 }
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116
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360
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361 nchanges = 0;
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0
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362 }
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363
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364 dvp.dp_fds = event_list;
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365 dvp.dp_nfds = nevents;
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366 dvp.dp_timeout = timer;
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367 events = ioctl(dp, DP_POLL, &dvp);
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368
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369 if (events == -1) {
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370 err = ngx_errno;
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371 } else {
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372 err = 0;
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373 }
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374
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112
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375 if (flags & NGX_UPDATE_TIME) {
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376 ngx_time_update(0, 0);
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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
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112
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407 ngx_mutex_lock(ngx_posted_events_mutex);
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0
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408
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409 for (i = 0; i < events; i++) {
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324
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410
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411 fd = event_list[i].fd;
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|
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
|
|
324
|
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",
|
|
324
|
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",
|
|
324
|
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",
|
|
324
|
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) {
|
|
|
550 return NGX_CONF_ERROR;
|
|
|
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 }
|
