Mercurial > hg > nginx-quic
annotate src/http/ngx_http_busy_lock.c @ 4160:88369902edb1 stable-1.0
Merging r4010, r4065:
SSL related fixes:
*) Fixing proxy_set_body and proxy_pass_request_body with SSL.
Flush flag wasn't set in constructed buffer and this prevented any data
from being actually sent to upstream due to SSL buffering. Make sure
we always set flush in the last buffer we are going to sent.
See here for report:
http://nginx.org/pipermail/nginx-ru/2011-June/041552.html
*) Proper SSL shutdown handling.
If connection has unsent alerts, SSL_shutdown() tries to send them even
if SSL_set_shutdown(SSL_RECEIVED_SHUTDOWN|SSL_SENT_SHUTDOWN) was used.
This can be prevented by SSL_set_quiet_shutdown(). SSL_set_shutdown()
is required nevertheless to preserve session.
author | Igor Sysoev <igor@sysoev.ru> |
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date | Fri, 30 Sep 2011 13:42:59 +0000 |
parents | 4c43e25d11ea |
children | d620f497c50f |
rev | line source |
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2 /* |
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3 * Copyright (C) Igor Sysoev |
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4 */ |
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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_http.h> |
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1565 | 13 static int ngx_http_busy_lock_look_cacheable(ngx_http_busy_lock_t *bl, |
14 ngx_http_busy_lock_ctx_t *bc, | |
15 int lock); | |
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18 int ngx_http_busy_lock(ngx_http_busy_lock_t *bl, ngx_http_busy_lock_ctx_t *bc) |
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19 { |
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20 if (bl->busy < bl->max_busy) { |
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21 bl->busy++; |
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23 if (bc->time) { |
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24 bc->time = 0; |
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25 bl->waiting--; |
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26 } |
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28 return NGX_OK; |
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29 } |
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31 if (bc->time) { |
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32 if (bc->time < bl->timeout) { |
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33 ngx_add_timer(bc->event, 1000); |
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34 return NGX_AGAIN; |
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35 } |
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36 |
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37 bl->waiting--; |
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38 return NGX_DONE; |
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40 } |
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42 if (bl->timeout == 0) { |
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43 return NGX_DONE; |
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44 } |
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46 if (bl->waiting < bl->max_waiting) { |
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47 bl->waiting++; |
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509 | 49 #if 0 |
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50 ngx_add_timer(bc->event, 1000); |
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51 bc->event->event_handler = bc->event_handler; |
509 | 52 #endif |
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53 |
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54 /* TODO: ngx_handle_level_read_event() */ |
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56 return NGX_AGAIN; |
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57 } |
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59 return NGX_ERROR; |
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60 } |
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61 |
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1565 | 63 int ngx_http_busy_lock_cacheable(ngx_http_busy_lock_t *bl, |
64 ngx_http_busy_lock_ctx_t *bc, int lock) | |
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65 { |
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66 int rc; |
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1565 | 68 rc = ngx_http_busy_lock_look_cacheable(bl, bc, lock); |
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70 ngx_log_debug3(NGX_LOG_DEBUG_HTTP, bc->event->log, 0, |
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71 "http busylock: %d w:%d mw::%d", |
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72 rc, bl->waiting, bl->max_waiting); |
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74 if (rc == NGX_OK) { /* no the same request, there's free slot */ |
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75 return NGX_OK; |
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76 } |
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78 if (rc == NGX_ERROR && !lock) { /* no the same request, no free slot */ |
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79 return NGX_OK; |
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80 } |
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81 |
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82 /* rc == NGX_AGAIN: the same request */ |
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83 |
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84 if (bc->time) { |
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85 if (bc->time < bl->timeout) { |
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86 ngx_add_timer(bc->event, 1000); |
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87 return NGX_AGAIN; |
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88 } |
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89 |
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90 bl->waiting--; |
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91 return NGX_DONE; |
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92 |
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93 } |
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95 if (bl->timeout == 0) { |
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96 return NGX_DONE; |
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97 } |
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98 |
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99 if (bl->waiting < bl->max_waiting) { |
509 | 100 #if 0 |
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101 bl->waiting++; |
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102 ngx_add_timer(bc->event, 1000); |
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103 bc->event->event_handler = bc->event_handler; |
509 | 104 #endif |
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105 |
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106 /* TODO: ngx_handle_level_read_event() */ |
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107 |
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108 return NGX_AGAIN; |
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109 } |
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110 |
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111 return NGX_ERROR; |
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112 } |
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113 |
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114 |
178
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115 void ngx_http_busy_unlock(ngx_http_busy_lock_t *bl, |
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116 ngx_http_busy_lock_ctx_t *bc) |
176
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117 { |
189
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118 if (bl == NULL) { |
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119 return; |
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120 } |
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121 |
178
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122 if (bl->md5) { |
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123 bl->md5_mask[bc->slot / 8] &= ~(1 << (bc->slot & 7)); |
1565 | 124 bl->cacheable--; |
178
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125 } |
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126 |
176
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127 bl->busy--; |
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128 } |
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129 |
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130 |
1565 | 131 static int ngx_http_busy_lock_look_cacheable(ngx_http_busy_lock_t *bl, |
132 ngx_http_busy_lock_ctx_t *bc, | |
133 int lock) | |
176
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134 { |
1565 | 135 int i, b, cacheable, free; |
175
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136 u_int mask; |
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137 |
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138 b = 0; |
1565 | 139 cacheable = 0; |
175
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140 free = -1; |
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141 |
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142 #if (NGX_SUPPRESS_WARN) |
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143 mask = 0; |
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144 #endif |
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145 |
176
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146 for (i = 0; i < bl->max_busy; i++) { |
175
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147 |
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148 if ((b & 7) == 0) { |
176
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149 mask = bl->md5_mask[i / 8]; |
175
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150 } |
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151 |
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152 if (mask & 1) { |
176
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153 if (ngx_memcmp(&bl->md5[i * 16], bc->md5, 16) == 0) { |
175
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154 return NGX_AGAIN; |
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155 } |
1565 | 156 cacheable++; |
175
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157 |
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158 } else if (free == -1) { |
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159 free = i; |
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160 } |
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161 |
176
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162 #if 1 |
1565 | 163 if (cacheable == bl->cacheable) { |
164 if (free == -1 && cacheable < bl->max_busy) { | |
175
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165 free = i + 1; |
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166 } |
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167 |
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168 break; |
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169 } |
176
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170 #endif |
175
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171 |
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172 mask >>= 1; |
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173 b++; |
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174 } |
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175 |
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176 if (free == -1) { |
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177 return NGX_ERROR; |
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178 } |
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179 |
176
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180 if (lock) { |
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181 if (bl->busy == bl->max_busy) { |
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182 return NGX_ERROR; |
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183 } |
175
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184 |
176
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185 ngx_memcpy(&bl->md5[free * 16], bc->md5, 16); |
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186 bl->md5_mask[free / 8] |= 1 << (free & 7); |
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187 bc->slot = free; |
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188 |
1565 | 189 bl->cacheable++; |
176
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190 bl->busy++; |
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191 } |
175
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192 |
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193 return NGX_OK; |
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194 } |
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195 |
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196 |
174
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197 char *ngx_http_set_busy_lock_slot(ngx_conf_t *cf, ngx_command_t *cmd, |
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198 void *conf) |
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199 { |
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200 char *p = conf; |
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201 |
290
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202 ngx_uint_t i, dup, invalid; |
176
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203 ngx_str_t *value, line; |
174
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204 ngx_http_busy_lock_t *bl, **blp; |
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205 |
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206 blp = (ngx_http_busy_lock_t **) (p + cmd->offset); |
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207 if (*blp) { |
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208 return "is duplicate"; |
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209 } |
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210 |
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211 /* ngx_calloc_shared() */ |
501 | 212 bl = ngx_pcalloc(cf->pool, sizeof(ngx_http_busy_lock_t)); |
213 if (bl == NULL) { | |
174
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214 return NGX_CONF_ERROR; |
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215 } |
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216 *blp = bl; |
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217 |
272
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218 /* ngx_calloc_shared() */ |
501 | 219 bl->mutex = ngx_pcalloc(cf->pool, sizeof(ngx_event_mutex_t)); |
220 if (bl->mutex == NULL) { | |
272
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221 return NGX_CONF_ERROR; |
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222 } |
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223 |
176
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224 dup = 0; |
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225 invalid = 0; |
195
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226 value = cf->args->elts; |
174
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227 |
176
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228 for (i = 1; i < cf->args->nelts; i++) { |
174
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229 |
176
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230 if (value[i].data[1] != '=') { |
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231 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
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232 "invalid value \"%s\"", value[i].data); |
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233 return NGX_CONF_ERROR; |
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234 } |
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235 |
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236 switch (value[i].data[0]) { |
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237 |
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238 case 'b': |
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239 if (bl->max_busy) { |
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240 dup = 1; |
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241 break; |
174
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242 } |
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243 |
176
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244 bl->max_busy = ngx_atoi(value[i].data + 2, value[i].len - 2); |
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245 if (bl->max_busy == NGX_ERROR) { |
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246 invalid = 1; |
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247 break; |
174
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248 } |
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249 |
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250 continue; |
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251 |
176
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252 case 'w': |
174
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253 if (bl->max_waiting) { |
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254 dup = 1; |
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255 break; |
174
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256 } |
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257 |
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258 bl->max_waiting = ngx_atoi(value[i].data + 2, value[i].len - 2); |
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259 if (bl->max_waiting == NGX_ERROR) { |
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260 invalid = 1; |
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261 break; |
174
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262 } |
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263 |
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264 continue; |
176
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265 |
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266 case 't': |
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267 if (bl->timeout) { |
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268 dup = 1; |
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269 break; |
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270 } |
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271 |
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272 line.len = value[i].len - 2; |
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273 line.data = value[i].data + 2; |
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274 |
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275 bl->timeout = ngx_parse_time(&line, 1); |
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276 if (bl->timeout == NGX_ERROR) { |
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277 invalid = 1; |
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278 break; |
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279 } |
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280 |
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281 continue; |
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282 |
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283 default: |
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284 invalid = 1; |
174
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285 } |
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286 |
176
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287 if (dup) { |
174
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288 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
176
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289 "duplicate value \"%s\"", value[i].data); |
174
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290 return NGX_CONF_ERROR; |
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291 } |
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292 |
176
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293 if (invalid) { |
174
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294 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
176
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295 "invalid value \"%s\"", value[i].data); |
174
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296 return NGX_CONF_ERROR; |
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297 } |
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298 } |
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299 |
176
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300 if (bl->timeout == 0 && bl->max_waiting) { |
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301 ngx_conf_log_error(NGX_LOG_WARN, cf, 0, |
276
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302 "busy lock waiting is useless with zero timeout, ignoring"); |
176
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303 } |
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304 |
174
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305 return NGX_CONF_OK; |
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306 } |