Mercurial > hg > nginx-quic
annotate src/http/modules/ngx_http_limit_req_module.c @ 6023:b550563ef96e
Added support for offloading Linux sendfile() in thread pools.
author | Valentin Bartenev <vbart@nginx.com> |
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date | Sat, 14 Mar 2015 17:37:30 +0300 |
parents | 102f85699420 |
children | 3b7a60371a9a |
rev | line source |
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980 | 1 |
2 /* | |
3 * Copyright (C) Igor Sysoev | |
4412 | 4 * Copyright (C) Nginx, Inc. |
980 | 5 */ |
6 | |
7 | |
8 #include <ngx_config.h> | |
9 #include <ngx_core.h> | |
10 #include <ngx_http.h> | |
11 | |
12 | |
13 typedef struct { | |
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14 u_char color; |
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15 u_char dummy; |
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16 u_short len; |
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17 ngx_queue_t queue; |
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18 ngx_msec_t last; |
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19 /* integer value, 1 corresponds to 0.001 r/s */ |
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20 ngx_uint_t excess; |
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21 ngx_uint_t count; |
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22 u_char data[1]; |
2294 | 23 } ngx_http_limit_req_node_t; |
980 | 24 |
25 | |
26 typedef struct { | |
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27 ngx_rbtree_t rbtree; |
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28 ngx_rbtree_node_t sentinel; |
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29 ngx_queue_t queue; |
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30 } ngx_http_limit_req_shctx_t; |
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31 |
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32 |
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33 typedef struct { |
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34 ngx_http_limit_req_shctx_t *sh; |
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35 ngx_slab_pool_t *shpool; |
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36 /* integer value, 1 corresponds to 0.001 r/s */ |
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37 ngx_uint_t rate; |
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38 ngx_http_complex_value_t key; |
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39 ngx_http_limit_req_node_t *node; |
2294 | 40 } ngx_http_limit_req_ctx_t; |
987 | 41 |
42 | |
43 typedef struct { | |
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44 ngx_shm_zone_t *shm_zone; |
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45 /* integer value, 1 corresponds to 0.001 r/s */ |
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46 ngx_uint_t burst; |
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47 ngx_uint_t nodelay; /* unsigned nodelay:1 */ |
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48 } ngx_http_limit_req_limit_t; |
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49 |
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50 |
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51 typedef struct { |
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52 ngx_array_t limits; |
3185 | 53 ngx_uint_t limit_log_level; |
54 ngx_uint_t delay_log_level; | |
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55 ngx_uint_t status_code; |
2294 | 56 } ngx_http_limit_req_conf_t; |
980 | 57 |
58 | |
2294 | 59 static void ngx_http_limit_req_delay(ngx_http_request_t *r); |
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60 static ngx_int_t ngx_http_limit_req_lookup(ngx_http_limit_req_limit_t *limit, |
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61 ngx_uint_t hash, ngx_str_t *key, ngx_uint_t *ep, ngx_uint_t account); |
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62 static ngx_msec_t ngx_http_limit_req_account(ngx_http_limit_req_limit_t *limits, |
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63 ngx_uint_t n, ngx_uint_t *ep, ngx_http_limit_req_limit_t **limit); |
2294 | 64 static void ngx_http_limit_req_expire(ngx_http_limit_req_ctx_t *ctx, |
65 ngx_uint_t n); | |
980 | 66 |
2294 | 67 static void *ngx_http_limit_req_create_conf(ngx_conf_t *cf); |
68 static char *ngx_http_limit_req_merge_conf(ngx_conf_t *cf, void *parent, | |
980 | 69 void *child); |
2294 | 70 static char *ngx_http_limit_req_zone(ngx_conf_t *cf, ngx_command_t *cmd, |
980 | 71 void *conf); |
2294 | 72 static char *ngx_http_limit_req(ngx_conf_t *cf, ngx_command_t *cmd, |
980 | 73 void *conf); |
2294 | 74 static ngx_int_t ngx_http_limit_req_init(ngx_conf_t *cf); |
980 | 75 |
76 | |
3185 | 77 static ngx_conf_enum_t ngx_http_limit_req_log_levels[] = { |
78 { ngx_string("info"), NGX_LOG_INFO }, | |
79 { ngx_string("notice"), NGX_LOG_NOTICE }, | |
80 { ngx_string("warn"), NGX_LOG_WARN }, | |
81 { ngx_string("error"), NGX_LOG_ERR }, | |
82 { ngx_null_string, 0 } | |
83 }; | |
84 | |
85 | |
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86 static ngx_conf_num_bounds_t ngx_http_limit_req_status_bounds = { |
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87 ngx_conf_check_num_bounds, 400, 599 |
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88 }; |
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89 |
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90 |
2294 | 91 static ngx_command_t ngx_http_limit_req_commands[] = { |
980 | 92 |
2294 | 93 { ngx_string("limit_req_zone"), |
987 | 94 NGX_HTTP_MAIN_CONF|NGX_CONF_TAKE3, |
2294 | 95 ngx_http_limit_req_zone, |
980 | 96 0, |
97 0, | |
98 NULL }, | |
99 | |
2294 | 100 { ngx_string("limit_req"), |
101 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE123, | |
102 ngx_http_limit_req, | |
980 | 103 NGX_HTTP_LOC_CONF_OFFSET, |
104 0, | |
105 NULL }, | |
106 | |
3185 | 107 { ngx_string("limit_req_log_level"), |
108 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, | |
109 ngx_conf_set_enum_slot, | |
110 NGX_HTTP_LOC_CONF_OFFSET, | |
111 offsetof(ngx_http_limit_req_conf_t, limit_log_level), | |
112 &ngx_http_limit_req_log_levels }, | |
113 | |
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114 { ngx_string("limit_req_status"), |
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115 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, |
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116 ngx_conf_set_num_slot, |
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117 NGX_HTTP_LOC_CONF_OFFSET, |
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118 offsetof(ngx_http_limit_req_conf_t, status_code), |
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119 &ngx_http_limit_req_status_bounds }, |
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120 |
980 | 121 ngx_null_command |
122 }; | |
123 | |
124 | |
2294 | 125 static ngx_http_module_t ngx_http_limit_req_module_ctx = { |
980 | 126 NULL, /* preconfiguration */ |
2294 | 127 ngx_http_limit_req_init, /* postconfiguration */ |
980 | 128 |
129 NULL, /* create main configuration */ | |
130 NULL, /* init main configuration */ | |
131 | |
132 NULL, /* create server configuration */ | |
133 NULL, /* merge server configuration */ | |
134 | |
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135 ngx_http_limit_req_create_conf, /* create location configuration */ |
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136 ngx_http_limit_req_merge_conf /* merge location configuration */ |
980 | 137 }; |
138 | |
139 | |
2294 | 140 ngx_module_t ngx_http_limit_req_module = { |
980 | 141 NGX_MODULE_V1, |
2294 | 142 &ngx_http_limit_req_module_ctx, /* module context */ |
143 ngx_http_limit_req_commands, /* module directives */ | |
980 | 144 NGX_HTTP_MODULE, /* module type */ |
145 NULL, /* init master */ | |
146 NULL, /* init module */ | |
147 NULL, /* init process */ | |
148 NULL, /* init thread */ | |
149 NULL, /* exit thread */ | |
150 NULL, /* exit process */ | |
151 NULL, /* exit master */ | |
152 NGX_MODULE_V1_PADDING | |
153 }; | |
154 | |
155 | |
156 static ngx_int_t | |
2294 | 157 ngx_http_limit_req_handler(ngx_http_request_t *r) |
980 | 158 { |
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159 uint32_t hash; |
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160 ngx_str_t key; |
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161 ngx_int_t rc; |
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162 ngx_uint_t n, excess; |
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163 ngx_msec_t delay; |
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164 ngx_http_limit_req_ctx_t *ctx; |
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165 ngx_http_limit_req_conf_t *lrcf; |
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166 ngx_http_limit_req_limit_t *limit, *limits; |
980 | 167 |
2294 | 168 if (r->main->limit_req_set) { |
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169 return NGX_DECLINED; |
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170 } |
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171 |
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172 lrcf = ngx_http_get_module_loc_conf(r, ngx_http_limit_req_module); |
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173 limits = lrcf->limits.elts; |
980 | 174 |
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175 excess = 0; |
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176 |
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177 rc = NGX_DECLINED; |
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178 |
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179 #if (NGX_SUPPRESS_WARN) |
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180 limit = NULL; |
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181 #endif |
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182 |
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183 for (n = 0; n < lrcf->limits.nelts; n++) { |
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184 |
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185 limit = &limits[n]; |
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186 |
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187 ctx = limit->shm_zone->data; |
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188 |
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189 if (ngx_http_complex_value(r, &ctx->key, &key) != NGX_OK) { |
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190 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
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191 } |
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192 |
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193 if (key.len == 0) { |
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194 continue; |
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195 } |
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196 |
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197 if (key.len > 65535) { |
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198 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, |
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199 "the value of the \"%V\" key " |
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200 "is more than 65535 bytes: \"%V\"", |
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201 &ctx->key.value, &key); |
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202 continue; |
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203 } |
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204 |
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205 hash = ngx_crc32_short(key.data, key.len); |
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206 |
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207 ngx_shmtx_lock(&ctx->shpool->mutex); |
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208 |
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209 rc = ngx_http_limit_req_lookup(limit, hash, &key, &excess, |
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210 (n == lrcf->limits.nelts - 1)); |
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211 |
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212 ngx_shmtx_unlock(&ctx->shpool->mutex); |
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213 |
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214 ngx_log_debug4(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
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215 "limit_req[%ui]: %i %ui.%03ui", |
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216 n, rc, excess / 1000, excess % 1000); |
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217 |
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218 if (rc != NGX_AGAIN) { |
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219 break; |
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220 } |
980 | 221 } |
222 | |
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223 if (rc == NGX_DECLINED) { |
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224 return NGX_DECLINED; |
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225 } |
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226 |
2294 | 227 r->main->limit_req_set = 1; |
980 | 228 |
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229 if (rc == NGX_BUSY || rc == NGX_ERROR) { |
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230 |
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231 if (rc == NGX_BUSY) { |
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232 ngx_log_error(lrcf->limit_log_level, r->connection->log, 0, |
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233 "limiting requests, excess: %ui.%03ui by zone \"%V\"", |
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234 excess / 1000, excess % 1000, |
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235 &limit->shm_zone->shm.name); |
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236 } |
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237 |
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238 while (n--) { |
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239 ctx = limits[n].shm_zone->data; |
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240 |
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241 if (ctx->node == NULL) { |
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242 continue; |
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243 } |
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244 |
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245 ngx_shmtx_lock(&ctx->shpool->mutex); |
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246 |
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247 ctx->node->count--; |
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248 |
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249 ngx_shmtx_unlock(&ctx->shpool->mutex); |
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250 |
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251 ctx->node = NULL; |
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252 } |
980 | 253 |
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254 return lrcf->status_code; |
980 | 255 } |
256 | |
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257 /* rc == NGX_AGAIN || rc == NGX_OK */ |
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258 |
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259 if (rc == NGX_AGAIN) { |
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260 excess = 0; |
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261 } |
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262 |
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263 delay = ngx_http_limit_req_account(limits, n, &excess, &limit); |
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264 |
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265 if (!delay) { |
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266 return NGX_DECLINED; |
2294 | 267 } |
268 | |
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269 ngx_log_error(lrcf->delay_log_level, r->connection->log, 0, |
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270 "delaying request, excess: %ui.%03ui, by zone \"%V\"", |
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271 excess / 1000, excess % 1000, &limit->shm_zone->shm.name); |
2294 | 272 |
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273 if (ngx_handle_read_event(r->connection->read, 0) != NGX_OK) { |
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274 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
2294 | 275 } |
276 | |
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277 r->read_event_handler = ngx_http_test_reading; |
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278 r->write_event_handler = ngx_http_limit_req_delay; |
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279 ngx_add_timer(r->connection->write, delay); |
2294 | 280 |
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281 return NGX_AGAIN; |
980 | 282 } |
283 | |
284 | |
285 static void | |
2294 | 286 ngx_http_limit_req_delay(ngx_http_request_t *r) |
287 { | |
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288 ngx_event_t *wev; |
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289 |
2294 | 290 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
2973 | 291 "limit_req delay"); |
2294 | 292 |
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293 wev = r->connection->write; |
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294 |
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295 if (!wev->timedout) { |
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296 |
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297 if (ngx_handle_write_event(wev, 0) != NGX_OK) { |
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298 ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR); |
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299 } |
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300 |
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301 return; |
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302 } |
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303 |
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304 wev->timedout = 0; |
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305 |
2294 | 306 if (ngx_handle_read_event(r->connection->read, 0) != NGX_OK) { |
307 ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR); | |
308 return; | |
309 } | |
310 | |
311 r->read_event_handler = ngx_http_block_reading; | |
312 r->write_event_handler = ngx_http_core_run_phases; | |
313 | |
314 ngx_http_core_run_phases(r); | |
315 } | |
316 | |
317 | |
318 static void | |
319 ngx_http_limit_req_rbtree_insert_value(ngx_rbtree_node_t *temp, | |
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320 ngx_rbtree_node_t *node, ngx_rbtree_node_t *sentinel) |
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321 { |
2294 | 322 ngx_rbtree_node_t **p; |
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323 ngx_http_limit_req_node_t *lrn, *lrnt; |
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324 |
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325 for ( ;; ) { |
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326 |
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327 if (node->key < temp->key) { |
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328 |
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329 p = &temp->left; |
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330 |
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331 } else if (node->key > temp->key) { |
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332 |
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333 p = &temp->right; |
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334 |
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335 } else { /* node->key == temp->key */ |
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336 |
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337 lrn = (ngx_http_limit_req_node_t *) &node->color; |
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338 lrnt = (ngx_http_limit_req_node_t *) &temp->color; |
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339 |
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340 p = (ngx_memn2cmp(lrn->data, lrnt->data, lrn->len, lrnt->len) < 0) |
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341 ? &temp->left : &temp->right; |
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342 } |
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343 |
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344 if (*p == sentinel) { |
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345 break; |
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346 } |
1026
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347 |
1743
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348 temp = *p; |
1026
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349 } |
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350 |
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351 *p = node; |
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352 node->parent = temp; |
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353 node->left = sentinel; |
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354 node->right = sentinel; |
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|
355 ngx_rbt_red(node); |
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356 } |
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357 |
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|
358 |
2294 | 359 static ngx_int_t |
4420
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Limit req: support for multiple "limit_req" limits.
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|
360 ngx_http_limit_req_lookup(ngx_http_limit_req_limit_t *limit, ngx_uint_t hash, |
5863
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Limit req: reduced number of parameters in the lookup function.
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|
361 ngx_str_t *key, ngx_uint_t *ep, ngx_uint_t account) |
980 | 362 { |
4418
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Valentin Bartenev <vbart@nginx.com>
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|
363 size_t size; |
2313 | 364 ngx_int_t rc, excess; |
2294 | 365 ngx_time_t *tp; |
366 ngx_msec_t now; | |
367 ngx_msec_int_t ms; | |
368 ngx_rbtree_node_t *node, *sentinel; | |
369 ngx_http_limit_req_ctx_t *ctx; | |
2374
7b11f9a1bfe1
rename "lz" to "lr" in variable names
Igor Sysoev <igor@sysoev.ru>
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diff
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|
370 ngx_http_limit_req_node_t *lr; |
2294 | 371 |
4418
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|
372 tp = ngx_timeofday(); |
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|
373 now = (ngx_msec_t) (tp->sec * 1000 + tp->msec); |
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374 |
4420
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|
375 ctx = limit->shm_zone->data; |
2294 | 376 |
2720
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support attaching to an existent Win32 shared memory
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parents:
2716
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|
377 node = ctx->sh->rbtree.root; |
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|
378 sentinel = ctx->sh->rbtree.sentinel; |
980 | 379 |
2294 | 380 while (node != sentinel) { |
381 | |
382 if (hash < node->key) { | |
383 node = node->left; | |
384 continue; | |
385 } | |
386 | |
387 if (hash > node->key) { | |
388 node = node->right; | |
389 continue; | |
390 } | |
391 | |
392 /* hash == node->key */ | |
393 | |
4497
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Fix of rbtree lookup on hash collisions.
Maxim Dounin <mdounin@mdounin.ru>
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|
394 lr = (ngx_http_limit_req_node_t *) &node->color; |
2294 | 395 |
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|
396 rc = ngx_memn2cmp(key->data, lr->data, key->len, (size_t) lr->len); |
3191 | 397 |
4497
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Fix of rbtree lookup on hash collisions.
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|
398 if (rc == 0) { |
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Fix of rbtree lookup on hash collisions.
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|
399 ngx_queue_remove(&lr->queue); |
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Fix of rbtree lookup on hash collisions.
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|
400 ngx_queue_insert_head(&ctx->sh->queue, &lr->queue); |
3183
b87542338ac3
make limit_req to conform to the leaky bucket algorithm
Igor Sysoev <igor@sysoev.ru>
parents:
2973
diff
changeset
|
401 |
4497
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Fix of rbtree lookup on hash collisions.
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changeset
|
402 ms = (ngx_msec_int_t) (now - lr->last); |
980 | 403 |
4497
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Fix of rbtree lookup on hash collisions.
Maxim Dounin <mdounin@mdounin.ru>
parents:
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changeset
|
404 excess = lr->excess - ctx->rate * ngx_abs(ms) / 1000 + 1000; |
4420
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Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
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|
405 |
4497
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Fix of rbtree lookup on hash collisions.
Maxim Dounin <mdounin@mdounin.ru>
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|
406 if (excess < 0) { |
95ab6658654a
Fix of rbtree lookup on hash collisions.
Maxim Dounin <mdounin@mdounin.ru>
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|
407 excess = 0; |
2294 | 408 } |
409 | |
4497
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Fix of rbtree lookup on hash collisions.
Maxim Dounin <mdounin@mdounin.ru>
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|
410 *ep = excess; |
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Fix of rbtree lookup on hash collisions.
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|
411 |
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Fix of rbtree lookup on hash collisions.
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|
412 if ((ngx_uint_t) excess > limit->burst) { |
95ab6658654a
Fix of rbtree lookup on hash collisions.
Maxim Dounin <mdounin@mdounin.ru>
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|
413 return NGX_BUSY; |
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Fix of rbtree lookup on hash collisions.
Maxim Dounin <mdounin@mdounin.ru>
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|
414 } |
2294 | 415 |
4497
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Fix of rbtree lookup on hash collisions.
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|
416 if (account) { |
95ab6658654a
Fix of rbtree lookup on hash collisions.
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|
417 lr->excess = excess; |
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Fix of rbtree lookup on hash collisions.
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|
418 lr->last = now; |
95ab6658654a
Fix of rbtree lookup on hash collisions.
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|
419 return NGX_OK; |
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Fix of rbtree lookup on hash collisions.
Maxim Dounin <mdounin@mdounin.ru>
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|
420 } |
2294 | 421 |
4497
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Fix of rbtree lookup on hash collisions.
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|
422 lr->count++; |
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Fix of rbtree lookup on hash collisions.
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|
423 |
95ab6658654a
Fix of rbtree lookup on hash collisions.
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changeset
|
424 ctx->node = lr; |
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Fix of rbtree lookup on hash collisions.
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|
425 |
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Fix of rbtree lookup on hash collisions.
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|
426 return NGX_AGAIN; |
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Fix of rbtree lookup on hash collisions.
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|
427 } |
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Maxim Dounin <mdounin@mdounin.ru>
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4424
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changeset
|
428 |
95ab6658654a
Fix of rbtree lookup on hash collisions.
Maxim Dounin <mdounin@mdounin.ru>
parents:
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diff
changeset
|
429 node = (rc < 0) ? node->left : node->right; |
980 | 430 } |
431 | |
3779
57aecfdcac3d
an excess was logged as 0.000 if requests were limited without delay:
Igor Sysoev <igor@sysoev.ru>
parents:
3525
diff
changeset
|
432 *ep = 0; |
2294 | 433 |
4418
aac79fc948cc
Limit req: allocation and initialization of a new node moved to the lookup
Valentin Bartenev <vbart@nginx.com>
parents:
4417
diff
changeset
|
434 size = offsetof(ngx_rbtree_node_t, color) |
aac79fc948cc
Limit req: allocation and initialization of a new node moved to the lookup
Valentin Bartenev <vbart@nginx.com>
parents:
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diff
changeset
|
435 + offsetof(ngx_http_limit_req_node_t, data) |
5863
102f85699420
Limit req: reduced number of parameters in the lookup function.
Valentin Bartenev <vbart@nginx.com>
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diff
changeset
|
436 + key->len; |
4418
aac79fc948cc
Limit req: allocation and initialization of a new node moved to the lookup
Valentin Bartenev <vbart@nginx.com>
parents:
4417
diff
changeset
|
437 |
4419
7084faa7a4b4
Limit req: number of cleanup calls reduced.
Valentin Bartenev <vbart@nginx.com>
parents:
4418
diff
changeset
|
438 ngx_http_limit_req_expire(ctx, 1); |
7084faa7a4b4
Limit req: number of cleanup calls reduced.
Valentin Bartenev <vbart@nginx.com>
parents:
4418
diff
changeset
|
439 |
4418
aac79fc948cc
Limit req: allocation and initialization of a new node moved to the lookup
Valentin Bartenev <vbart@nginx.com>
parents:
4417
diff
changeset
|
440 node = ngx_slab_alloc_locked(ctx->shpool, size); |
aac79fc948cc
Limit req: allocation and initialization of a new node moved to the lookup
Valentin Bartenev <vbart@nginx.com>
parents:
4417
diff
changeset
|
441 |
aac79fc948cc
Limit req: allocation and initialization of a new node moved to the lookup
Valentin Bartenev <vbart@nginx.com>
parents:
4417
diff
changeset
|
442 if (node == NULL) { |
aac79fc948cc
Limit req: allocation and initialization of a new node moved to the lookup
Valentin Bartenev <vbart@nginx.com>
parents:
4417
diff
changeset
|
443 ngx_http_limit_req_expire(ctx, 0); |
aac79fc948cc
Limit req: allocation and initialization of a new node moved to the lookup
Valentin Bartenev <vbart@nginx.com>
parents:
4417
diff
changeset
|
444 |
aac79fc948cc
Limit req: allocation and initialization of a new node moved to the lookup
Valentin Bartenev <vbart@nginx.com>
parents:
4417
diff
changeset
|
445 node = ngx_slab_alloc_locked(ctx->shpool, size); |
aac79fc948cc
Limit req: allocation and initialization of a new node moved to the lookup
Valentin Bartenev <vbart@nginx.com>
parents:
4417
diff
changeset
|
446 if (node == NULL) { |
5634
5024d29354f1
Core: slab log_nomem flag.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5411
diff
changeset
|
447 ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, 0, |
5024d29354f1
Core: slab log_nomem flag.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5411
diff
changeset
|
448 "could not allocate node%s", ctx->shpool->log_ctx); |
4418
aac79fc948cc
Limit req: allocation and initialization of a new node moved to the lookup
Valentin Bartenev <vbart@nginx.com>
parents:
4417
diff
changeset
|
449 return NGX_ERROR; |
aac79fc948cc
Limit req: allocation and initialization of a new node moved to the lookup
Valentin Bartenev <vbart@nginx.com>
parents:
4417
diff
changeset
|
450 } |
aac79fc948cc
Limit req: allocation and initialization of a new node moved to the lookup
Valentin Bartenev <vbart@nginx.com>
parents:
4417
diff
changeset
|
451 } |
aac79fc948cc
Limit req: allocation and initialization of a new node moved to the lookup
Valentin Bartenev <vbart@nginx.com>
parents:
4417
diff
changeset
|
452 |
aac79fc948cc
Limit req: allocation and initialization of a new node moved to the lookup
Valentin Bartenev <vbart@nginx.com>
parents:
4417
diff
changeset
|
453 node->key = hash; |
aac79fc948cc
Limit req: allocation and initialization of a new node moved to the lookup
Valentin Bartenev <vbart@nginx.com>
parents:
4417
diff
changeset
|
454 |
aac79fc948cc
Limit req: allocation and initialization of a new node moved to the lookup
Valentin Bartenev <vbart@nginx.com>
parents:
4417
diff
changeset
|
455 lr = (ngx_http_limit_req_node_t *) &node->color; |
aac79fc948cc
Limit req: allocation and initialization of a new node moved to the lookup
Valentin Bartenev <vbart@nginx.com>
parents:
4417
diff
changeset
|
456 |
5863
102f85699420
Limit req: reduced number of parameters in the lookup function.
Valentin Bartenev <vbart@nginx.com>
parents:
5862
diff
changeset
|
457 lr->len = (u_short) key->len; |
4418
aac79fc948cc
Limit req: allocation and initialization of a new node moved to the lookup
Valentin Bartenev <vbart@nginx.com>
parents:
4417
diff
changeset
|
458 lr->excess = 0; |
aac79fc948cc
Limit req: allocation and initialization of a new node moved to the lookup
Valentin Bartenev <vbart@nginx.com>
parents:
4417
diff
changeset
|
459 |
5863
102f85699420
Limit req: reduced number of parameters in the lookup function.
Valentin Bartenev <vbart@nginx.com>
parents:
5862
diff
changeset
|
460 ngx_memcpy(lr->data, key->data, key->len); |
4418
aac79fc948cc
Limit req: allocation and initialization of a new node moved to the lookup
Valentin Bartenev <vbart@nginx.com>
parents:
4417
diff
changeset
|
461 |
4832
949ea3d3cd1a
Limit req: fix of rbtree node insertion on hash collisions.
Valentin Bartenev <vbart@nginx.com>
parents:
4811
diff
changeset
|
462 ngx_rbtree_insert(&ctx->sh->rbtree, node); |
949ea3d3cd1a
Limit req: fix of rbtree node insertion on hash collisions.
Valentin Bartenev <vbart@nginx.com>
parents:
4811
diff
changeset
|
463 |
949ea3d3cd1a
Limit req: fix of rbtree node insertion on hash collisions.
Valentin Bartenev <vbart@nginx.com>
parents:
4811
diff
changeset
|
464 ngx_queue_insert_head(&ctx->sh->queue, &lr->queue); |
949ea3d3cd1a
Limit req: fix of rbtree node insertion on hash collisions.
Valentin Bartenev <vbart@nginx.com>
parents:
4811
diff
changeset
|
465 |
4420
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
466 if (account) { |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
467 lr->last = now; |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
468 lr->count = 0; |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
469 return NGX_OK; |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
470 } |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
471 |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
472 lr->last = 0; |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
473 lr->count = 1; |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
474 |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
475 ctx->node = lr; |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
476 |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
477 return NGX_AGAIN; |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
478 } |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
479 |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
480 |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
481 static ngx_msec_t |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
482 ngx_http_limit_req_account(ngx_http_limit_req_limit_t *limits, ngx_uint_t n, |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
483 ngx_uint_t *ep, ngx_http_limit_req_limit_t **limit) |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
484 { |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
485 ngx_int_t excess; |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
486 ngx_time_t *tp; |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
487 ngx_msec_t now, delay, max_delay; |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
488 ngx_msec_int_t ms; |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
489 ngx_http_limit_req_ctx_t *ctx; |
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Limit req: support for multiple "limit_req" limits.
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490 ngx_http_limit_req_node_t *lr; |
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491 |
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492 excess = *ep; |
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493 |
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494 if (excess == 0 || (*limit)->nodelay) { |
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495 max_delay = 0; |
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496 |
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497 } else { |
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498 ctx = (*limit)->shm_zone->data; |
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499 max_delay = excess * 1000 / ctx->rate; |
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500 } |
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501 |
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502 while (n--) { |
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503 ctx = limits[n].shm_zone->data; |
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504 lr = ctx->node; |
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505 |
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506 if (lr == NULL) { |
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507 continue; |
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508 } |
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509 |
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510 ngx_shmtx_lock(&ctx->shpool->mutex); |
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511 |
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512 tp = ngx_timeofday(); |
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513 |
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514 now = (ngx_msec_t) (tp->sec * 1000 + tp->msec); |
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515 ms = (ngx_msec_int_t) (now - lr->last); |
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516 |
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517 excess = lr->excess - ctx->rate * ngx_abs(ms) / 1000 + 1000; |
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518 |
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519 if (excess < 0) { |
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520 excess = 0; |
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521 } |
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522 |
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523 lr->last = now; |
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524 lr->excess = excess; |
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525 lr->count--; |
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526 |
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527 ngx_shmtx_unlock(&ctx->shpool->mutex); |
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528 |
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529 ctx->node = NULL; |
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530 |
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531 if (limits[n].nodelay) { |
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532 continue; |
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533 } |
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534 |
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535 delay = excess * 1000 / ctx->rate; |
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536 |
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537 if (delay > max_delay) { |
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538 max_delay = delay; |
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539 *ep = excess; |
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540 *limit = &limits[n]; |
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541 } |
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542 } |
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543 |
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544 return max_delay; |
2294 | 545 } |
546 | |
547 | |
548 static void | |
549 ngx_http_limit_req_expire(ngx_http_limit_req_ctx_t *ctx, ngx_uint_t n) | |
550 { | |
2313 | 551 ngx_int_t excess; |
2294 | 552 ngx_time_t *tp; |
553 ngx_msec_t now; | |
554 ngx_queue_t *q; | |
555 ngx_msec_int_t ms; | |
556 ngx_rbtree_node_t *node; | |
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557 ngx_http_limit_req_node_t *lr; |
2294 | 558 |
559 tp = ngx_timeofday(); | |
560 | |
561 now = (ngx_msec_t) (tp->sec * 1000 + tp->msec); | |
562 | |
563 /* | |
564 * n == 1 deletes one or two zero rate entries | |
565 * n == 0 deletes oldest entry by force | |
566 * and one or two zero rate entries | |
567 */ | |
568 | |
569 while (n < 3) { | |
570 | |
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571 if (ngx_queue_empty(&ctx->sh->queue)) { |
2294 | 572 return; |
573 } | |
574 | |
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575 q = ngx_queue_last(&ctx->sh->queue); |
2294 | 576 |
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577 lr = ngx_queue_data(q, ngx_http_limit_req_node_t, queue); |
2294 | 578 |
4420
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579 if (lr->count) { |
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580 |
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|
581 /* |
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582 * There is not much sense in looking further, |
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583 * because we bump nodes on the lookup stage. |
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|
584 */ |
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|
585 |
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|
586 return; |
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|
587 } |
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|
588 |
2294 | 589 if (n++ != 0) { |
590 | |
2374
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591 ms = (ngx_msec_int_t) (now - lr->last); |
2294 | 592 ms = ngx_abs(ms); |
593 | |
594 if (ms < 60000) { | |
595 return; | |
596 } | |
597 | |
2374
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|
598 excess = lr->excess - ctx->rate * ms / 1000; |
2294 | 599 |
2313 | 600 if (excess > 0) { |
2294 | 601 return; |
602 } | |
603 } | |
604 | |
605 ngx_queue_remove(q); | |
606 | |
607 node = (ngx_rbtree_node_t *) | |
2374
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|
608 ((u_char *) lr - offsetof(ngx_rbtree_node_t, color)); |
2294 | 609 |
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610 ngx_rbtree_delete(&ctx->sh->rbtree, node); |
2294 | 611 |
612 ngx_slab_free_locked(ctx->shpool, node); | |
613 } | |
980 | 614 } |
615 | |
616 | |
617 static ngx_int_t | |
2294 | 618 ngx_http_limit_req_init_zone(ngx_shm_zone_t *shm_zone, void *data) |
980 | 619 { |
2294 | 620 ngx_http_limit_req_ctx_t *octx = data; |
993
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|
621 |
2611
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diff
changeset
|
622 size_t len; |
2294 | 623 ngx_http_limit_req_ctx_t *ctx; |
980 | 624 |
993
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625 ctx = shm_zone->data; |
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626 |
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changeset
|
627 if (octx) { |
5862
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Limit req: use complex value in limit_req_zone.
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diff
changeset
|
628 if (ctx->key.value.len != octx->key.value.len |
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Limit req: use complex value in limit_req_zone.
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diff
changeset
|
629 || ngx_strncmp(ctx->key.value.data, octx->key.value.data, |
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diff
changeset
|
630 ctx->key.value.len) |
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diff
changeset
|
631 != 0) |
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diff
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|
632 { |
993
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diff
changeset
|
633 ngx_log_error(NGX_LOG_EMERG, shm_zone->shm.log, 0, |
5862
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diff
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|
634 "limit_req \"%V\" uses the \"%V\" key " |
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diff
changeset
|
635 "while previously it used the \"%V\" key", |
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diff
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|
636 &shm_zone->shm.name, &ctx->key.value, |
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diff
changeset
|
637 &octx->key.value); |
993
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diff
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|
638 return NGX_ERROR; |
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changeset
|
639 } |
1b9a4d92173f
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diff
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|
640 |
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641 ctx->sh = octx->sh; |
2294 | 642 ctx->shpool = octx->shpool; |
993
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diff
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|
643 |
1b9a4d92173f
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diff
changeset
|
644 return NGX_OK; |
1b9a4d92173f
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diff
changeset
|
645 } |
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diff
changeset
|
646 |
2294 | 647 ctx->shpool = (ngx_slab_pool_t *) shm_zone->shm.addr; |
980 | 648 |
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|
649 if (shm_zone->shm.exists) { |
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|
650 ctx->sh = ctx->shpool->data; |
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|
651 |
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|
652 return NGX_OK; |
980 | 653 } |
654 | |
2720
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655 ctx->sh = ngx_slab_alloc(ctx->shpool, sizeof(ngx_http_limit_req_shctx_t)); |
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|
656 if (ctx->sh == NULL) { |
980 | 657 return NGX_ERROR; |
658 } | |
659 | |
2720
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|
660 ctx->shpool->data = ctx->sh; |
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|
661 |
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diff
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|
662 ngx_rbtree_init(&ctx->sh->rbtree, &ctx->sh->sentinel, |
2294 | 663 ngx_http_limit_req_rbtree_insert_value); |
664 | |
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support attaching to an existent Win32 shared memory
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|
665 ngx_queue_init(&ctx->sh->queue); |
980 | 666 |
2716
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Igor Sysoev <igor@sysoev.ru>
parents:
2612
diff
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|
667 len = sizeof(" in limit_req zone \"\"") + shm_zone->shm.name.len; |
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improve ngx_slab_alloc() error logging
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|
668 |
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669 ctx->shpool->log_ctx = ngx_slab_alloc(ctx->shpool, len); |
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670 if (ctx->shpool->log_ctx == NULL) { |
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671 return NGX_ERROR; |
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|
672 } |
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|
673 |
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674 ngx_sprintf(ctx->shpool->log_ctx, " in limit_req zone \"%V\"%Z", |
2716
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675 &shm_zone->shm.name); |
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676 |
5634
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677 ctx->shpool->log_nomem = 0; |
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678 |
980 | 679 return NGX_OK; |
680 } | |
681 | |
682 | |
683 static void * | |
2294 | 684 ngx_http_limit_req_create_conf(ngx_conf_t *cf) |
980 | 685 { |
2294 | 686 ngx_http_limit_req_conf_t *conf; |
980 | 687 |
2294 | 688 conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_limit_req_conf_t)); |
980 | 689 if (conf == NULL) { |
2912
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690 return NULL; |
980 | 691 } |
692 | |
693 /* | |
694 * set by ngx_pcalloc(): | |
695 * | |
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696 * conf->limits.elts = NULL; |
980 | 697 */ |
698 | |
3185 | 699 conf->limit_log_level = NGX_CONF_UNSET_UINT; |
5117
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The limit_req_status and limit_conn_status directives.
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|
700 conf->status_code = NGX_CONF_UNSET_UINT; |
3185 | 701 |
980 | 702 return conf; |
703 } | |
704 | |
705 | |
706 static char * | |
2294 | 707 ngx_http_limit_req_merge_conf(ngx_conf_t *cf, void *parent, void *child) |
980 | 708 { |
2294 | 709 ngx_http_limit_req_conf_t *prev = parent; |
710 ngx_http_limit_req_conf_t *conf = child; | |
980 | 711 |
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712 if (conf->limits.elts == NULL) { |
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Limit req: support for multiple "limit_req" limits.
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713 conf->limits = prev->limits; |
980 | 714 } |
715 | |
3185 | 716 ngx_conf_merge_uint_value(conf->limit_log_level, prev->limit_log_level, |
717 NGX_LOG_ERR); | |
718 | |
719 conf->delay_log_level = (conf->limit_log_level == NGX_LOG_INFO) ? | |
720 NGX_LOG_INFO : conf->limit_log_level + 1; | |
721 | |
5117
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722 ngx_conf_merge_uint_value(conf->status_code, prev->status_code, |
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|
723 NGX_HTTP_SERVICE_UNAVAILABLE); |
00e4459739ed
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724 |
980 | 725 return NGX_CONF_OK; |
726 } | |
727 | |
728 | |
729 static char * | |
2294 | 730 ngx_http_limit_req_zone(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) |
980 | 731 { |
5862
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Valentin Bartenev <vbart@nginx.com>
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|
732 u_char *p; |
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|
733 size_t len; |
ecbb99aa0e12
Limit req: use complex value in limit_req_zone.
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|
734 ssize_t size; |
ecbb99aa0e12
Limit req: use complex value in limit_req_zone.
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|
735 ngx_str_t *value, name, s; |
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|
736 ngx_int_t rate, scale; |
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|
737 ngx_uint_t i; |
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diff
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|
738 ngx_shm_zone_t *shm_zone; |
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Limit req: use complex value in limit_req_zone.
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diff
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|
739 ngx_http_limit_req_ctx_t *ctx; |
ecbb99aa0e12
Limit req: use complex value in limit_req_zone.
Valentin Bartenev <vbart@nginx.com>
parents:
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diff
changeset
|
740 ngx_http_compile_complex_value_t ccv; |
980 | 741 |
742 value = cf->args->elts; | |
743 | |
5862
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|
744 ctx = ngx_pcalloc(cf->pool, sizeof(ngx_http_limit_req_ctx_t)); |
ecbb99aa0e12
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changeset
|
745 if (ctx == NULL) { |
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|
746 return NGX_CONF_ERROR; |
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diff
changeset
|
747 } |
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|
748 |
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changeset
|
749 ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t)); |
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Limit req: use complex value in limit_req_zone.
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|
750 |
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changeset
|
751 ccv.cf = cf; |
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|
752 ccv.value = &value[1]; |
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Limit req: use complex value in limit_req_zone.
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diff
changeset
|
753 ccv.complex_value = &ctx->key; |
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Limit req: use complex value in limit_req_zone.
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diff
changeset
|
754 |
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diff
changeset
|
755 if (ngx_http_compile_complex_value(&ccv) != NGX_OK) { |
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parents:
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diff
changeset
|
756 return NGX_CONF_ERROR; |
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Limit req: use complex value in limit_req_zone.
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parents:
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diff
changeset
|
757 } |
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parents:
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diff
changeset
|
758 |
2294 | 759 size = 0; |
760 rate = 1; | |
761 scale = 1; | |
762 name.len = 0; | |
763 | |
5862
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parents:
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diff
changeset
|
764 for (i = 2; i < cf->args->nelts; i++) { |
2294 | 765 |
766 if (ngx_strncmp(value[i].data, "zone=", 5) == 0) { | |
767 | |
768 name.data = value[i].data + 5; | |
769 | |
770 p = (u_char *) ngx_strchr(name.data, ':'); | |
771 | |
4417
9e9d2e06f933
Limit req: improved error handling when parsing "zone" parameter of
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parents:
4416
diff
changeset
|
772 if (p == NULL) { |
9e9d2e06f933
Limit req: improved error handling when parsing "zone" parameter of
Valentin Bartenev <vbart@nginx.com>
parents:
4416
diff
changeset
|
773 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
9e9d2e06f933
Limit req: improved error handling when parsing "zone" parameter of
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parents:
4416
diff
changeset
|
774 "invalid zone size \"%V\"", &value[i]); |
9e9d2e06f933
Limit req: improved error handling when parsing "zone" parameter of
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parents:
4416
diff
changeset
|
775 return NGX_CONF_ERROR; |
2294 | 776 } |
777 | |
4417
9e9d2e06f933
Limit req: improved error handling when parsing "zone" parameter of
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parents:
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diff
changeset
|
778 name.len = p - name.data; |
9e9d2e06f933
Limit req: improved error handling when parsing "zone" parameter of
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parents:
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diff
changeset
|
779 |
9e9d2e06f933
Limit req: improved error handling when parsing "zone" parameter of
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parents:
4416
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changeset
|
780 s.data = p + 1; |
9e9d2e06f933
Limit req: improved error handling when parsing "zone" parameter of
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parents:
4416
diff
changeset
|
781 s.len = value[i].data + value[i].len - s.data; |
9e9d2e06f933
Limit req: improved error handling when parsing "zone" parameter of
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parents:
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diff
changeset
|
782 |
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Limit req: improved error handling when parsing "zone" parameter of
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parents:
4416
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changeset
|
783 size = ngx_parse_size(&s); |
9e9d2e06f933
Limit req: improved error handling when parsing "zone" parameter of
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diff
changeset
|
784 |
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Limit req: improved error handling when parsing "zone" parameter of
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parents:
4416
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changeset
|
785 if (size == NGX_ERROR) { |
9e9d2e06f933
Limit req: improved error handling when parsing "zone" parameter of
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changeset
|
786 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
9e9d2e06f933
Limit req: improved error handling when parsing "zone" parameter of
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parents:
4416
diff
changeset
|
787 "invalid zone size \"%V\"", &value[i]); |
9e9d2e06f933
Limit req: improved error handling when parsing "zone" parameter of
Valentin Bartenev <vbart@nginx.com>
parents:
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diff
changeset
|
788 return NGX_CONF_ERROR; |
9e9d2e06f933
Limit req: improved error handling when parsing "zone" parameter of
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diff
changeset
|
789 } |
9e9d2e06f933
Limit req: improved error handling when parsing "zone" parameter of
Valentin Bartenev <vbart@nginx.com>
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diff
changeset
|
790 |
9e9d2e06f933
Limit req: improved error handling when parsing "zone" parameter of
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4416
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changeset
|
791 if (size < (ssize_t) (8 * ngx_pagesize)) { |
9e9d2e06f933
Limit req: improved error handling when parsing "zone" parameter of
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parents:
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changeset
|
792 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
9e9d2e06f933
Limit req: improved error handling when parsing "zone" parameter of
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diff
changeset
|
793 "zone \"%V\" is too small", &value[i]); |
9e9d2e06f933
Limit req: improved error handling when parsing "zone" parameter of
Valentin Bartenev <vbart@nginx.com>
parents:
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diff
changeset
|
794 return NGX_CONF_ERROR; |
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Limit req: improved error handling when parsing "zone" parameter of
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|
795 } |
9e9d2e06f933
Limit req: improved error handling when parsing "zone" parameter of
Valentin Bartenev <vbart@nginx.com>
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diff
changeset
|
796 |
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changeset
|
797 continue; |
2294 | 798 } |
799 | |
800 if (ngx_strncmp(value[i].data, "rate=", 5) == 0) { | |
801 | |
802 len = value[i].len; | |
803 p = value[i].data + len - 3; | |
987 | 804 |
2294 | 805 if (ngx_strncmp(p, "r/s", 3) == 0) { |
806 scale = 1; | |
807 len -= 3; | |
808 | |
809 } else if (ngx_strncmp(p, "r/m", 3) == 0) { | |
810 scale = 60; | |
811 len -= 3; | |
812 } | |
813 | |
814 rate = ngx_atoi(value[i].data + 5, len - 5); | |
5166
fc595eeb6c54
Limit req: rate should be non-zero.
Valentin Bartenev <vbart@nginx.com>
parents:
5117
diff
changeset
|
815 if (rate <= 0) { |
2294 | 816 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
817 "invalid rate \"%V\"", &value[i]); | |
818 return NGX_CONF_ERROR; | |
819 } | |
820 | |
821 continue; | |
822 } | |
823 | |
824 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, | |
825 "invalid parameter \"%V\"", &value[i]); | |
987 | 826 return NGX_CONF_ERROR; |
827 } | |
828 | |
4417
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Limit req: improved error handling when parsing "zone" parameter of
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changeset
|
829 if (name.len == 0) { |
2294 | 830 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
831 "\"%V\" must have \"zone\" parameter", | |
832 &cmd->name); | |
987 | 833 return NGX_CONF_ERROR; |
834 } | |
835 | |
2313 | 836 ctx->rate = rate * 1000 / scale; |
980 | 837 |
2294 | 838 shm_zone = ngx_shared_memory_add(cf, &name, size, |
839 &ngx_http_limit_req_module); | |
980 | 840 if (shm_zone == NULL) { |
841 return NGX_CONF_ERROR; | |
842 } | |
843 | |
987 | 844 if (shm_zone->data) { |
845 ctx = shm_zone->data; | |
846 | |
847 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, | |
5862
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|
848 "%V \"%V\" is already bound to key \"%V\"", |
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Limit req: use complex value in limit_req_zone.
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diff
changeset
|
849 &cmd->name, &name, &ctx->key.value); |
987 | 850 return NGX_CONF_ERROR; |
851 } | |
852 | |
2294 | 853 shm_zone->init = ngx_http_limit_req_init_zone; |
987 | 854 shm_zone->data = ctx; |
980 | 855 |
856 return NGX_CONF_OK; | |
857 } | |
858 | |
859 | |
860 static char * | |
2294 | 861 ngx_http_limit_req(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) |
980 | 862 { |
2374
7b11f9a1bfe1
rename "lz" to "lr" in variable names
Igor Sysoev <igor@sysoev.ru>
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2313
diff
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|
863 ngx_http_limit_req_conf_t *lrcf = conf; |
980 | 864 |
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4419
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|
865 ngx_int_t burst; |
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Limit req: support for multiple "limit_req" limits.
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866 ngx_str_t *value, s; |
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Limit req: support for multiple "limit_req" limits.
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|
867 ngx_uint_t i, nodelay; |
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|
868 ngx_shm_zone_t *shm_zone; |
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Limit req: support for multiple "limit_req" limits.
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|
869 ngx_http_limit_req_limit_t *limit, *limits; |
980 | 870 |
871 value = cf->args->elts; | |
872 | |
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|
873 shm_zone = NULL; |
2294 | 874 burst = 0; |
4420
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Limit req: support for multiple "limit_req" limits.
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|
875 nodelay = 0; |
2294 | 876 |
877 for (i = 1; i < cf->args->nelts; i++) { | |
878 | |
879 if (ngx_strncmp(value[i].data, "zone=", 5) == 0) { | |
880 | |
881 s.len = value[i].len - 5; | |
882 s.data = value[i].data + 5; | |
883 | |
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|
884 shm_zone = ngx_shared_memory_add(cf, &s, 0, |
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|
885 &ngx_http_limit_req_module); |
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Limit req: support for multiple "limit_req" limits.
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4419
diff
changeset
|
886 if (shm_zone == NULL) { |
2294 | 887 return NGX_CONF_ERROR; |
888 } | |
889 | |
890 continue; | |
891 } | |
892 | |
893 if (ngx_strncmp(value[i].data, "burst=", 6) == 0) { | |
894 | |
2300
159136c9808d
*) correct leaky bucket implementation
Igor Sysoev <igor@sysoev.ru>
parents:
2294
diff
changeset
|
895 burst = ngx_atoi(value[i].data + 6, value[i].len - 6); |
2294 | 896 if (burst <= 0) { |
897 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, | |
898 "invalid burst rate \"%V\"", &value[i]); | |
899 return NGX_CONF_ERROR; | |
900 } | |
901 | |
902 continue; | |
903 } | |
904 | |
5411
5483d9e77b32
Limit req: fixed "nodelay" parsing.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5166
diff
changeset
|
905 if (ngx_strcmp(value[i].data, "nodelay") == 0) { |
4420
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
906 nodelay = 1; |
2294 | 907 continue; |
908 } | |
909 | |
910 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, | |
911 "invalid parameter \"%V\"", &value[i]); | |
980 | 912 return NGX_CONF_ERROR; |
913 } | |
914 | |
4420
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
915 if (shm_zone == NULL) { |
980 | 916 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
2294 | 917 "\"%V\" must have \"zone\" parameter", |
918 &cmd->name); | |
980 | 919 return NGX_CONF_ERROR; |
920 } | |
921 | |
4420
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
922 if (shm_zone->data == NULL) { |
1011
19118c44303f
test length of variable and number of connections
Igor Sysoev <igor@sysoev.ru>
parents:
1002
diff
changeset
|
923 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
2294 | 924 "unknown limit_req_zone \"%V\"", |
4420
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
925 &shm_zone->shm.name); |
1011
19118c44303f
test length of variable and number of connections
Igor Sysoev <igor@sysoev.ru>
parents:
1002
diff
changeset
|
926 return NGX_CONF_ERROR; |
19118c44303f
test length of variable and number of connections
Igor Sysoev <igor@sysoev.ru>
parents:
1002
diff
changeset
|
927 } |
19118c44303f
test length of variable and number of connections
Igor Sysoev <igor@sysoev.ru>
parents:
1002
diff
changeset
|
928 |
4420
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
929 limits = lrcf->limits.elts; |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
930 |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
931 if (limits == NULL) { |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
932 if (ngx_array_init(&lrcf->limits, cf->pool, 1, |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
933 sizeof(ngx_http_limit_req_limit_t)) |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
934 != NGX_OK) |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
935 { |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
936 return NGX_CONF_ERROR; |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
937 } |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
938 } |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
939 |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
940 for (i = 0; i < lrcf->limits.nelts; i++) { |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
941 if (shm_zone == limits[i].shm_zone) { |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
942 return "is duplicate"; |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
943 } |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
944 } |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
945 |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
946 limit = ngx_array_push(&lrcf->limits); |
4811
21d1e3bcb356
Added three missing checks for NULL after ngx_array_push() calls.
Valentin Bartenev <vbart@nginx.com>
parents:
4499
diff
changeset
|
947 if (limit == NULL) { |
21d1e3bcb356
Added three missing checks for NULL after ngx_array_push() calls.
Valentin Bartenev <vbart@nginx.com>
parents:
4499
diff
changeset
|
948 return NGX_CONF_ERROR; |
21d1e3bcb356
Added three missing checks for NULL after ngx_array_push() calls.
Valentin Bartenev <vbart@nginx.com>
parents:
4499
diff
changeset
|
949 } |
4420
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
950 |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
951 limit->shm_zone = shm_zone; |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
952 limit->burst = burst * 1000; |
9ce48f9eb85b
Limit req: support for multiple "limit_req" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4419
diff
changeset
|
953 limit->nodelay = nodelay; |
980 | 954 |
955 return NGX_CONF_OK; | |
956 } | |
957 | |
958 | |
959 static ngx_int_t | |
2294 | 960 ngx_http_limit_req_init(ngx_conf_t *cf) |
980 | 961 { |
962 ngx_http_handler_pt *h; | |
963 ngx_http_core_main_conf_t *cmcf; | |
964 | |
965 cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module); | |
966 | |
967 h = ngx_array_push(&cmcf->phases[NGX_HTTP_PREACCESS_PHASE].handlers); | |
968 if (h == NULL) { | |
969 return NGX_ERROR; | |
970 } | |
971 | |
2294 | 972 *h = ngx_http_limit_req_handler; |
980 | 973 |
974 return NGX_OK; | |
975 } |