Mercurial > hg > nginx
annotate src/http/modules/ngx_http_limit_conn_module.c @ 4458:2d4ff8bd5649
Limit conn: returned to the old behavior of using the first actual limit on
the way.
It was unintentionally changed in r4272, so that it could only limit the first
location where the processing of the request has reached PREACCESS phase.
author | Valentin Bartenev <vbart@nginx.com> |
---|---|
date | Fri, 10 Feb 2012 10:48:58 +0000 |
parents | d620f497c50f |
children | 95ab6658654a |
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 { | |
981 | 14 u_char color; |
15 u_char len; | |
980 | 16 u_short conn; |
17 u_char data[1]; | |
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18 } ngx_http_limit_conn_node_t; |
980 | 19 |
20 | |
21 typedef struct { | |
22 ngx_shm_zone_t *shm_zone; | |
23 ngx_rbtree_node_t *node; | |
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24 } ngx_http_limit_conn_cleanup_t; |
980 | 25 |
26 | |
27 typedef struct { | |
987 | 28 ngx_rbtree_t *rbtree; |
29 ngx_int_t index; | |
30 ngx_str_t var; | |
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31 } ngx_http_limit_conn_ctx_t; |
987 | 32 |
33 | |
34 typedef struct { | |
980 | 35 ngx_shm_zone_t *shm_zone; |
36 ngx_uint_t conn; | |
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37 } ngx_http_limit_conn_limit_t; |
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38 |
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39 |
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40 typedef struct { |
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41 ngx_array_t limits; |
3186 | 42 ngx_uint_t log_level; |
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43 } ngx_http_limit_conn_conf_t; |
980 | 44 |
45 | |
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46 static ngx_rbtree_node_t *ngx_http_limit_conn_lookup(ngx_rbtree_t *rbtree, |
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47 ngx_http_variable_value_t *vv, uint32_t hash); |
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48 static void ngx_http_limit_conn_cleanup(void *data); |
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49 static ngx_inline void ngx_http_limit_conn_cleanup_all(ngx_pool_t *pool); |
980 | 50 |
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51 static void *ngx_http_limit_conn_create_conf(ngx_conf_t *cf); |
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52 static char *ngx_http_limit_conn_merge_conf(ngx_conf_t *cf, void *parent, |
980 | 53 void *child); |
4272
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54 static char *ngx_http_limit_conn_zone(ngx_conf_t *cf, ngx_command_t *cmd, |
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55 void *conf); |
980 | 56 static char *ngx_http_limit_zone(ngx_conf_t *cf, ngx_command_t *cmd, |
57 void *conf); | |
58 static char *ngx_http_limit_conn(ngx_conf_t *cf, ngx_command_t *cmd, | |
59 void *conf); | |
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60 static ngx_int_t ngx_http_limit_conn_init(ngx_conf_t *cf); |
980 | 61 |
62 | |
4272
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63 static ngx_conf_deprecated_t ngx_conf_deprecated_limit_zone = { |
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64 ngx_conf_deprecated, "limit_zone", "limit_conn_zone" |
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65 }; |
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66 |
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67 |
3186 | 68 static ngx_conf_enum_t ngx_http_limit_conn_log_levels[] = { |
69 { ngx_string("info"), NGX_LOG_INFO }, | |
70 { ngx_string("notice"), NGX_LOG_NOTICE }, | |
71 { ngx_string("warn"), NGX_LOG_WARN }, | |
72 { ngx_string("error"), NGX_LOG_ERR }, | |
73 { ngx_null_string, 0 } | |
74 }; | |
75 | |
76 | |
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77 static ngx_command_t ngx_http_limit_conn_commands[] = { |
980 | 78 |
4272
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79 { ngx_string("limit_conn_zone"), |
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80 NGX_HTTP_MAIN_CONF|NGX_CONF_TAKE2, |
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81 ngx_http_limit_conn_zone, |
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82 0, |
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83 0, |
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84 NULL }, |
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85 |
980 | 86 { ngx_string("limit_zone"), |
987 | 87 NGX_HTTP_MAIN_CONF|NGX_CONF_TAKE3, |
980 | 88 ngx_http_limit_zone, |
89 0, | |
90 0, | |
91 NULL }, | |
92 | |
93 { ngx_string("limit_conn"), | |
987 | 94 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE2, |
980 | 95 ngx_http_limit_conn, |
96 NGX_HTTP_LOC_CONF_OFFSET, | |
97 0, | |
98 NULL }, | |
99 | |
3186 | 100 { ngx_string("limit_conn_log_level"), |
101 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, | |
102 ngx_conf_set_enum_slot, | |
103 NGX_HTTP_LOC_CONF_OFFSET, | |
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104 offsetof(ngx_http_limit_conn_conf_t, log_level), |
3186 | 105 &ngx_http_limit_conn_log_levels }, |
106 | |
980 | 107 ngx_null_command |
108 }; | |
109 | |
110 | |
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111 static ngx_http_module_t ngx_http_limit_conn_module_ctx = { |
980 | 112 NULL, /* preconfiguration */ |
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113 ngx_http_limit_conn_init, /* postconfiguration */ |
980 | 114 |
115 NULL, /* create main configuration */ | |
116 NULL, /* init main configuration */ | |
117 | |
118 NULL, /* create server configuration */ | |
119 NULL, /* merge server configuration */ | |
120 | |
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121 ngx_http_limit_conn_create_conf, /* create location configration */ |
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122 ngx_http_limit_conn_merge_conf /* merge location configration */ |
980 | 123 }; |
124 | |
125 | |
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126 ngx_module_t ngx_http_limit_conn_module = { |
980 | 127 NGX_MODULE_V1, |
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128 &ngx_http_limit_conn_module_ctx, /* module context */ |
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129 ngx_http_limit_conn_commands, /* module directives */ |
980 | 130 NGX_HTTP_MODULE, /* module type */ |
131 NULL, /* init master */ | |
132 NULL, /* init module */ | |
133 NULL, /* init process */ | |
134 NULL, /* init thread */ | |
135 NULL, /* exit thread */ | |
136 NULL, /* exit process */ | |
137 NULL, /* exit master */ | |
138 NGX_MODULE_V1_PADDING | |
139 }; | |
140 | |
141 | |
142 static ngx_int_t | |
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143 ngx_http_limit_conn_handler(ngx_http_request_t *r) |
980 | 144 { |
145 size_t len, n; | |
146 uint32_t hash; | |
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147 ngx_uint_t i; |
980 | 148 ngx_slab_pool_t *shpool; |
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149 ngx_rbtree_node_t *node; |
980 | 150 ngx_pool_cleanup_t *cln; |
151 ngx_http_variable_value_t *vv; | |
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152 ngx_http_limit_conn_ctx_t *ctx; |
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153 ngx_http_limit_conn_node_t *lc; |
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154 ngx_http_limit_conn_conf_t *lccf; |
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155 ngx_http_limit_conn_limit_t *limits; |
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156 ngx_http_limit_conn_cleanup_t *lccln; |
980 | 157 |
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158 if (r->main->limit_conn_set) { |
984
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159 return NGX_DECLINED; |
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160 } |
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161 |
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162 lccf = ngx_http_get_module_loc_conf(r, ngx_http_limit_conn_module); |
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163 limits = lccf->limits.elts; |
980 | 164 |
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165 for (i = 0; i < lccf->limits.nelts; i++) { |
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166 ctx = limits[i].shm_zone->data; |
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167 |
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168 vv = ngx_http_get_indexed_variable(r, ctx->index); |
980 | 169 |
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170 if (vv == NULL || vv->not_found) { |
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171 continue; |
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172 } |
980 | 173 |
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174 len = vv->len; |
980 | 175 |
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176 if (len == 0) { |
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177 continue; |
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178 } |
980 | 179 |
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180 if (len > 255) { |
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181 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, |
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182 "the value of the \"%V\" variable " |
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183 "is more than 255 bytes: \"%v\"", |
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184 &ctx->var, vv); |
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185 continue; |
980 | 186 } |
187 | |
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188 r->main->limit_conn_set = 1; |
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189 |
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190 hash = ngx_crc32_short(vv->data, len); |
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191 |
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192 shpool = (ngx_slab_pool_t *) limits[i].shm_zone->shm.addr; |
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193 |
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194 ngx_shmtx_lock(&shpool->mutex); |
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195 |
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196 node = ngx_http_limit_conn_lookup(ctx->rbtree, vv, hash); |
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197 |
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198 if (node == NULL) { |
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199 |
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200 n = offsetof(ngx_rbtree_node_t, color) |
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201 + offsetof(ngx_http_limit_conn_node_t, data) |
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202 + len; |
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203 |
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204 node = ngx_slab_alloc_locked(shpool, n); |
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206 if (node == NULL) { |
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207 ngx_shmtx_unlock(&shpool->mutex); |
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208 ngx_http_limit_conn_cleanup_all(r->pool); |
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209 return NGX_HTTP_SERVICE_UNAVAILABLE; |
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210 } |
2373 | 211 |
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212 lc = (ngx_http_limit_conn_node_t *) &node->color; |
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213 |
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214 node->key = hash; |
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215 lc->len = (u_char) len; |
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216 lc->conn = 1; |
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217 ngx_memcpy(lc->data, vv->data, len); |
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218 |
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219 ngx_rbtree_insert(ctx->rbtree, node); |
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220 |
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221 } else { |
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222 |
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223 lc = (ngx_http_limit_conn_node_t *) &node->color; |
980 | 224 |
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225 if ((ngx_uint_t) lc->conn >= limits[i].conn) { |
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226 |
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227 ngx_shmtx_unlock(&shpool->mutex); |
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229 ngx_log_error(lccf->log_level, r->connection->log, 0, |
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230 "limiting connections by zone \"%V\"", |
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231 &limits[i].shm_zone->shm.name); |
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232 |
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233 ngx_http_limit_conn_cleanup_all(r->pool); |
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234 return NGX_HTTP_SERVICE_UNAVAILABLE; |
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235 } |
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236 |
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237 lc->conn++; |
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238 } |
980 | 239 |
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240 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
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241 "limit zone: %08XD %d", node->key, lc->conn); |
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243 ngx_shmtx_unlock(&shpool->mutex); |
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245 cln = ngx_pool_cleanup_add(r->pool, |
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246 sizeof(ngx_http_limit_conn_cleanup_t)); |
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247 if (cln == NULL) { |
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248 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
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249 } |
980 | 250 |
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251 cln->handler = ngx_http_limit_conn_cleanup; |
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252 lccln = cln->data; |
980 | 253 |
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254 lccln->shm_zone = limits[i].shm_zone; |
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255 lccln->node = node; |
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256 } |
980 | 257 |
258 return NGX_DECLINED; | |
259 } | |
260 | |
261 | |
262 static void | |
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263 ngx_http_limit_conn_rbtree_insert_value(ngx_rbtree_node_t *temp, |
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264 ngx_rbtree_node_t *node, ngx_rbtree_node_t *sentinel) |
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265 { |
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266 ngx_rbtree_node_t **p; |
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267 ngx_http_limit_conn_node_t *lcn, *lcnt; |
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268 |
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269 for ( ;; ) { |
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270 |
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271 if (node->key < temp->key) { |
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272 |
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273 p = &temp->left; |
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274 |
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275 } else if (node->key > temp->key) { |
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276 |
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277 p = &temp->right; |
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278 |
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279 } else { /* node->key == temp->key */ |
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280 |
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281 lcn = (ngx_http_limit_conn_node_t *) &node->color; |
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282 lcnt = (ngx_http_limit_conn_node_t *) &temp->color; |
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283 |
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284 p = (ngx_memn2cmp(lcn->data, lcnt->data, lcn->len, lcnt->len) < 0) |
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285 ? &temp->left : &temp->right; |
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286 } |
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287 |
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288 if (*p == sentinel) { |
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289 break; |
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290 } |
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291 |
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292 temp = *p; |
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293 } |
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294 |
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295 *p = node; |
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296 node->parent = temp; |
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297 node->left = sentinel; |
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298 node->right = sentinel; |
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299 ngx_rbt_red(node); |
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300 } |
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301 |
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302 |
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303 static ngx_rbtree_node_t * |
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304 ngx_http_limit_conn_lookup(ngx_rbtree_t *rbtree, ngx_http_variable_value_t *vv, |
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305 uint32_t hash) |
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306 { |
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307 ngx_int_t rc; |
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308 ngx_rbtree_node_t *node, *sentinel; |
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309 ngx_http_limit_conn_node_t *lcn; |
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310 |
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311 node = rbtree->root; |
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312 sentinel = rbtree->sentinel; |
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313 |
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314 while (node != sentinel) { |
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315 |
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316 if (hash < node->key) { |
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317 node = node->left; |
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318 continue; |
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319 } |
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320 |
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321 if (hash > node->key) { |
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322 node = node->right; |
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323 continue; |
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324 } |
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325 |
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326 /* hash == node->key */ |
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327 |
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328 do { |
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329 lcn = (ngx_http_limit_conn_node_t *) &node->color; |
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330 |
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331 rc = ngx_memn2cmp(vv->data, lcn->data, |
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332 (size_t) vv->len, (size_t) lcn->len); |
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333 if (rc == 0) { |
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334 return node; |
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335 } |
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336 |
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337 node = (rc < 0) ? node->left : node->right; |
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338 |
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339 } while (node != sentinel && hash == node->key); |
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340 |
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341 break; |
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342 } |
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343 |
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344 return NULL; |
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345 } |
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346 |
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347 |
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348 static void |
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349 ngx_http_limit_conn_cleanup(void *data) |
980 | 350 { |
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351 ngx_http_limit_conn_cleanup_t *lccln = data; |
980 | 352 |
353 ngx_slab_pool_t *shpool; | |
354 ngx_rbtree_node_t *node; | |
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355 ngx_http_limit_conn_ctx_t *ctx; |
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356 ngx_http_limit_conn_node_t *lc; |
980 | 357 |
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358 ctx = lccln->shm_zone->data; |
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359 shpool = (ngx_slab_pool_t *) lccln->shm_zone->shm.addr; |
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360 node = lccln->node; |
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361 lc = (ngx_http_limit_conn_node_t *) &node->color; |
980 | 362 |
363 ngx_shmtx_lock(&shpool->mutex); | |
364 | |
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365 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, lccln->shm_zone->shm.log, 0, |
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366 "limit zone cleanup: %08XD %d", node->key, lc->conn); |
980 | 367 |
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368 lc->conn--; |
980 | 369 |
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370 if (lc->conn == 0) { |
987 | 371 ngx_rbtree_delete(ctx->rbtree, node); |
980 | 372 ngx_slab_free_locked(shpool, node); |
373 } | |
374 | |
375 ngx_shmtx_unlock(&shpool->mutex); | |
376 } | |
377 | |
378 | |
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379 static ngx_inline void |
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380 ngx_http_limit_conn_cleanup_all(ngx_pool_t *pool) |
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381 { |
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382 ngx_pool_cleanup_t *cln; |
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383 |
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384 cln = pool->cleanup; |
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385 |
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386 while (cln && cln->handler == ngx_http_limit_conn_cleanup) { |
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387 ngx_http_limit_conn_cleanup(cln->data); |
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388 cln = cln->next; |
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389 } |
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390 |
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391 pool->cleanup = cln; |
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392 } |
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393 |
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394 |
980 | 395 static ngx_int_t |
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396 ngx_http_limit_conn_init_zone(ngx_shm_zone_t *shm_zone, void *data) |
980 | 397 { |
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398 ngx_http_limit_conn_ctx_t *octx = data; |
993
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399 |
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400 size_t len; |
987 | 401 ngx_slab_pool_t *shpool; |
402 ngx_rbtree_node_t *sentinel; | |
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403 ngx_http_limit_conn_ctx_t *ctx; |
980 | 404 |
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405 ctx = shm_zone->data; |
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406 |
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407 if (octx) { |
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408 if (ngx_strcmp(ctx->var.data, octx->var.data) != 0) { |
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409 ngx_log_error(NGX_LOG_EMERG, shm_zone->shm.log, 0, |
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410 "limit_conn_zone \"%V\" uses the \"%V\" variable " |
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411 "while previously it used the \"%V\" variable", |
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412 &shm_zone->shm.name, &ctx->var, &octx->var); |
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413 return NGX_ERROR; |
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414 } |
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415 |
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416 ctx->rbtree = octx->rbtree; |
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417 |
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418 return NGX_OK; |
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419 } |
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420 |
980 | 421 shpool = (ngx_slab_pool_t *) shm_zone->shm.addr; |
422 | |
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423 if (shm_zone->shm.exists) { |
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424 ctx->rbtree = shpool->data; |
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425 |
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426 return NGX_OK; |
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427 } |
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428 |
987 | 429 ctx->rbtree = ngx_slab_alloc(shpool, sizeof(ngx_rbtree_t)); |
430 if (ctx->rbtree == NULL) { | |
980 | 431 return NGX_ERROR; |
432 } | |
433 | |
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434 shpool->data = ctx->rbtree; |
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435 |
980 | 436 sentinel = ngx_slab_alloc(shpool, sizeof(ngx_rbtree_node_t)); |
437 if (sentinel == NULL) { | |
438 return NGX_ERROR; | |
439 } | |
440 | |
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441 ngx_rbtree_init(ctx->rbtree, sentinel, |
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442 ngx_http_limit_conn_rbtree_insert_value); |
980 | 443 |
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444 len = sizeof(" in limit_conn_zone \"\"") + shm_zone->shm.name.len; |
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445 |
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446 shpool->log_ctx = ngx_slab_alloc(shpool, len); |
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447 if (shpool->log_ctx == NULL) { |
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448 return NGX_ERROR; |
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449 } |
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450 |
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451 ngx_sprintf(shpool->log_ctx, " in limit_conn_zone \"%V\"%Z", |
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452 &shm_zone->shm.name); |
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453 |
980 | 454 return NGX_OK; |
455 } | |
456 | |
457 | |
458 static void * | |
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459 ngx_http_limit_conn_create_conf(ngx_conf_t *cf) |
980 | 460 { |
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461 ngx_http_limit_conn_conf_t *conf; |
980 | 462 |
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463 conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_limit_conn_conf_t)); |
980 | 464 if (conf == NULL) { |
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465 return NULL; |
980 | 466 } |
467 | |
468 /* | |
469 * set by ngx_pcalloc(): | |
470 * | |
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471 * conf->limits.elts = NULL; |
980 | 472 */ |
473 | |
3186 | 474 conf->log_level = NGX_CONF_UNSET_UINT; |
475 | |
980 | 476 return conf; |
477 } | |
478 | |
479 | |
480 static char * | |
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481 ngx_http_limit_conn_merge_conf(ngx_conf_t *cf, void *parent, void *child) |
980 | 482 { |
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483 ngx_http_limit_conn_conf_t *prev = parent; |
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484 ngx_http_limit_conn_conf_t *conf = child; |
980 | 485 |
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Limit zone: support for multiple "limit_conn" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4270
diff
changeset
|
486 if (conf->limits.elts == NULL) { |
4380
7697412a0921
Fixed limit_conn_log_level/limit_req_log_level inheritance.
Valentin Bartenev <vbart@nginx.com>
parents:
4280
diff
changeset
|
487 conf->limits = prev->limits; |
980 | 488 } |
489 | |
3186 | 490 ngx_conf_merge_uint_value(conf->log_level, prev->log_level, NGX_LOG_ERR); |
491 | |
980 | 492 return NGX_CONF_OK; |
493 } | |
494 | |
495 | |
496 static char * | |
4272
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
497 ngx_http_limit_conn_zone(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
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diff
changeset
|
498 { |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
499 u_char *p; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
500 ssize_t size; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
501 ngx_str_t *value, name, s; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
502 ngx_uint_t i; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
503 ngx_shm_zone_t *shm_zone; |
4280
91874133fb27
Renamed ngx_http_limit_zone_module to ngx_http_limit_conn_module.
Valentin Bartenev <vbart@nginx.com>
parents:
4272
diff
changeset
|
504 ngx_http_limit_conn_ctx_t *ctx; |
4272
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
505 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
506 value = cf->args->elts; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
507 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
508 ctx = NULL; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
509 size = 0; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
510 name.len = 0; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
511 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
512 for (i = 1; i < cf->args->nelts; i++) { |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
513 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
514 if (ngx_strncmp(value[i].data, "zone=", 5) == 0) { |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
515 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
516 name.data = value[i].data + 5; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
517 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
518 p = (u_char *) ngx_strchr(name.data, ':'); |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
519 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
520 if (p == NULL) { |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
521 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
522 "invalid zone size \"%V\"", &value[i]); |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
523 return NGX_CONF_ERROR; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
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diff
changeset
|
524 } |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
525 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
526 name.len = p - name.data; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
527 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
528 s.data = p + 1; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
529 s.len = value[i].data + value[i].len - s.data; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
530 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
531 size = ngx_parse_size(&s); |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
532 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
533 if (size == NGX_ERROR) { |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
534 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
535 "invalid zone size \"%V\"", &value[i]); |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
536 return NGX_CONF_ERROR; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
537 } |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
538 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
539 if (size < (ssize_t) (8 * ngx_pagesize)) { |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
540 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
541 "zone \"%V\" is too small", &value[i]); |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
542 return NGX_CONF_ERROR; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
543 } |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
544 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
545 continue; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
546 } |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
547 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
548 if (value[i].data[0] == '$') { |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
549 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
550 value[i].len--; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
551 value[i].data++; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
552 |
4280
91874133fb27
Renamed ngx_http_limit_zone_module to ngx_http_limit_conn_module.
Valentin Bartenev <vbart@nginx.com>
parents:
4272
diff
changeset
|
553 ctx = ngx_pcalloc(cf->pool, sizeof(ngx_http_limit_conn_ctx_t)); |
4272
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
554 if (ctx == NULL) { |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
555 return NGX_CONF_ERROR; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
556 } |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
557 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
558 ctx->index = ngx_http_get_variable_index(cf, &value[i]); |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
559 if (ctx->index == NGX_ERROR) { |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
560 return NGX_CONF_ERROR; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
561 } |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
562 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
563 ctx->var = value[i]; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
564 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
565 continue; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
566 } |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
567 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
568 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
569 "invalid parameter \"%V\"", &value[i]); |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
570 return NGX_CONF_ERROR; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
571 } |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
572 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
573 if (name.len == 0) { |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
574 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
575 "\"%V\" must have \"zone\" parameter", |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
576 &cmd->name); |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
577 return NGX_CONF_ERROR; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
578 } |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
579 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
580 if (ctx == NULL) { |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
581 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
582 "no variable is defined for %V \"%V\"", |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
583 &cmd->name, &name); |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
584 return NGX_CONF_ERROR; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
585 } |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
586 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
587 shm_zone = ngx_shared_memory_add(cf, &name, size, |
4280
91874133fb27
Renamed ngx_http_limit_zone_module to ngx_http_limit_conn_module.
Valentin Bartenev <vbart@nginx.com>
parents:
4272
diff
changeset
|
588 &ngx_http_limit_conn_module); |
4272
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
589 if (shm_zone == NULL) { |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
590 return NGX_CONF_ERROR; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
591 } |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
592 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
593 if (shm_zone->data) { |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
594 ctx = shm_zone->data; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
595 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
596 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
597 "%V \"%V\" is already bound to variable \"%V\"", |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
598 &cmd->name, &name, &ctx->var); |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
599 return NGX_CONF_ERROR; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
600 } |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
601 |
4280
91874133fb27
Renamed ngx_http_limit_zone_module to ngx_http_limit_conn_module.
Valentin Bartenev <vbart@nginx.com>
parents:
4272
diff
changeset
|
602 shm_zone->init = ngx_http_limit_conn_init_zone; |
4272
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
603 shm_zone->data = ctx; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
604 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
605 return NGX_CONF_OK; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
606 } |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
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607 |
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608 |
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609 static char * |
980 | 610 ngx_http_limit_zone(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) |
611 { | |
987 | 612 ssize_t n; |
613 ngx_str_t *value; | |
614 ngx_shm_zone_t *shm_zone; | |
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615 ngx_http_limit_conn_ctx_t *ctx; |
980 | 616 |
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617 ngx_conf_deprecated(cf, &ngx_conf_deprecated_limit_zone, NULL); |
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618 |
980 | 619 value = cf->args->elts; |
620 | |
987 | 621 if (value[2].data[0] != '$') { |
622 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, | |
623 "invalid variable name \"%V\"", &value[2]); | |
624 return NGX_CONF_ERROR; | |
625 } | |
626 | |
627 value[2].len--; | |
628 value[2].data++; | |
629 | |
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630 ctx = ngx_pcalloc(cf->pool, sizeof(ngx_http_limit_conn_ctx_t)); |
987 | 631 if (ctx == NULL) { |
632 return NGX_CONF_ERROR; | |
633 } | |
634 | |
635 ctx->index = ngx_http_get_variable_index(cf, &value[2]); | |
636 if (ctx->index == NGX_ERROR) { | |
637 return NGX_CONF_ERROR; | |
638 } | |
639 | |
640 ctx->var = value[2]; | |
641 | |
642 n = ngx_parse_size(&value[3]); | |
980 | 643 |
644 if (n == NGX_ERROR) { | |
645 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, | |
987 | 646 "invalid size of limit_zone \"%V\"", &value[3]); |
980 | 647 return NGX_CONF_ERROR; |
648 } | |
649 | |
650 if (n < (ngx_int_t) (8 * ngx_pagesize)) { | |
651 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, | |
652 "limit_zone \"%V\" is too small", &value[1]); | |
653 return NGX_CONF_ERROR; | |
654 } | |
655 | |
656 | |
657 shm_zone = ngx_shared_memory_add(cf, &value[1], n, | |
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658 &ngx_http_limit_conn_module); |
980 | 659 if (shm_zone == NULL) { |
660 return NGX_CONF_ERROR; | |
661 } | |
662 | |
987 | 663 if (shm_zone->data) { |
664 ctx = shm_zone->data; | |
665 | |
666 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, | |
667 "limit_zone \"%V\" is already bound to variable \"%V\"", | |
668 &value[1], &ctx->var); | |
669 return NGX_CONF_ERROR; | |
670 } | |
671 | |
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672 shm_zone->init = ngx_http_limit_conn_init_zone; |
987 | 673 shm_zone->data = ctx; |
980 | 674 |
675 return NGX_CONF_OK; | |
676 } | |
677 | |
678 | |
679 static char * | |
680 ngx_http_limit_conn(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) | |
681 { | |
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682 ngx_shm_zone_t *shm_zone; |
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683 ngx_http_limit_conn_conf_t *lccf = conf; |
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684 ngx_http_limit_conn_limit_t *limit, *limits; |
980 | 685 |
686 ngx_str_t *value; | |
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687 ngx_int_t n; |
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688 ngx_uint_t i; |
2372 | 689 |
980 | 690 value = cf->args->elts; |
691 | |
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692 shm_zone = ngx_shared_memory_add(cf, &value[1], 0, |
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693 &ngx_http_limit_conn_module); |
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694 if (shm_zone == NULL) { |
980 | 695 return NGX_CONF_ERROR; |
696 } | |
697 | |
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698 limits = lccf->limits.elts; |
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699 |
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700 if (limits == NULL) { |
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701 if (ngx_array_init(&lccf->limits, cf->pool, 1, |
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702 sizeof(ngx_http_limit_conn_limit_t)) |
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703 != NGX_OK) |
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704 { |
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705 return NGX_CONF_ERROR; |
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706 } |
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707 } |
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708 |
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709 for (i = 0; i < lccf->limits.nelts; i++) { |
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710 if (shm_zone == limits[i].shm_zone) { |
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711 return "is duplicate"; |
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712 } |
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713 } |
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714 |
987 | 715 n = ngx_atoi(value[2].data, value[2].len); |
716 if (n <= 0) { | |
980 | 717 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
987 | 718 "invalid number of connections \"%V\"", &value[2]); |
980 | 719 return NGX_CONF_ERROR; |
720 } | |
721 | |
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722 if (n > 65535) { |
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723 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
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724 "connection limit must be less 65536"); |
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725 return NGX_CONF_ERROR; |
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726 } |
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727 |
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728 limit = ngx_array_push(&lccf->limits); |
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729 limit->conn = n; |
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730 limit->shm_zone = shm_zone; |
980 | 731 |
732 return NGX_CONF_OK; | |
733 } | |
734 | |
735 | |
736 static ngx_int_t | |
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737 ngx_http_limit_conn_init(ngx_conf_t *cf) |
980 | 738 { |
739 ngx_http_handler_pt *h; | |
740 ngx_http_core_main_conf_t *cmcf; | |
741 | |
742 cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module); | |
743 | |
744 h = ngx_array_push(&cmcf->phases[NGX_HTTP_PREACCESS_PHASE].handlers); | |
745 if (h == NULL) { | |
746 return NGX_ERROR; | |
747 } | |
748 | |
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749 *h = ngx_http_limit_conn_handler; |
980 | 750 |
751 return NGX_OK; | |
752 } |