Mercurial > hg > nginx-quic
annotate src/http/modules/ngx_http_limit_conn_module.c @ 6948:3fb9b5eb75c0
Fixed ngx_open_cached_file() error handling.
If of.err is 0, it means that there was a memory allocation error
and no further logging and/or processing is needed. The of.failed
string can be only accessed if of.err is not 0.
author | Sergey Kandaurov <pluknet@nginx.com> |
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date | Tue, 28 Mar 2017 14:21:38 +0300 |
parents | f01ab2dbcfdc |
children | 359b0ea2b067 |
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 len; |
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16 u_short conn; |
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17 u_char data[1]; |
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18 } ngx_http_limit_conn_node_t; |
980 | 19 |
20 | |
21 typedef struct { | |
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22 ngx_shm_zone_t *shm_zone; |
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23 ngx_rbtree_node_t *node; |
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24 } ngx_http_limit_conn_cleanup_t; |
980 | 25 |
26 | |
27 typedef struct { | |
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28 ngx_rbtree_t *rbtree; |
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29 ngx_http_complex_value_t key; |
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30 } ngx_http_limit_conn_ctx_t; |
987 | 31 |
32 | |
33 typedef struct { | |
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34 ngx_shm_zone_t *shm_zone; |
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35 ngx_uint_t conn; |
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36 } ngx_http_limit_conn_limit_t; |
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37 |
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38 |
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39 typedef struct { |
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40 ngx_array_t limits; |
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41 ngx_uint_t log_level; |
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42 ngx_uint_t status_code; |
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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_str_t *key, 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); |
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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_conn(ngx_conf_t *cf, ngx_command_t *cmd, |
57 void *conf); | |
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58 static ngx_int_t ngx_http_limit_conn_init(ngx_conf_t *cf); |
980 | 59 |
60 | |
3186 | 61 static ngx_conf_enum_t ngx_http_limit_conn_log_levels[] = { |
62 { ngx_string("info"), NGX_LOG_INFO }, | |
63 { ngx_string("notice"), NGX_LOG_NOTICE }, | |
64 { ngx_string("warn"), NGX_LOG_WARN }, | |
65 { ngx_string("error"), NGX_LOG_ERR }, | |
66 { ngx_null_string, 0 } | |
67 }; | |
68 | |
69 | |
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70 static ngx_conf_num_bounds_t ngx_http_limit_conn_status_bounds = { |
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71 ngx_conf_check_num_bounds, 400, 599 |
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72 }; |
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73 |
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74 |
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75 static ngx_command_t ngx_http_limit_conn_commands[] = { |
980 | 76 |
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77 { ngx_string("limit_conn_zone"), |
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78 NGX_HTTP_MAIN_CONF|NGX_CONF_TAKE2, |
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79 ngx_http_limit_conn_zone, |
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80 0, |
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81 0, |
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82 NULL }, |
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83 |
980 | 84 { ngx_string("limit_conn"), |
987 | 85 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE2, |
980 | 86 ngx_http_limit_conn, |
87 NGX_HTTP_LOC_CONF_OFFSET, | |
88 0, | |
89 NULL }, | |
90 | |
3186 | 91 { ngx_string("limit_conn_log_level"), |
92 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, | |
93 ngx_conf_set_enum_slot, | |
94 NGX_HTTP_LOC_CONF_OFFSET, | |
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95 offsetof(ngx_http_limit_conn_conf_t, log_level), |
3186 | 96 &ngx_http_limit_conn_log_levels }, |
97 | |
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98 { ngx_string("limit_conn_status"), |
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99 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, |
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100 ngx_conf_set_num_slot, |
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101 NGX_HTTP_LOC_CONF_OFFSET, |
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102 offsetof(ngx_http_limit_conn_conf_t, status_code), |
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103 &ngx_http_limit_conn_status_bounds }, |
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104 |
980 | 105 ngx_null_command |
106 }; | |
107 | |
108 | |
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109 static ngx_http_module_t ngx_http_limit_conn_module_ctx = { |
980 | 110 NULL, /* preconfiguration */ |
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111 ngx_http_limit_conn_init, /* postconfiguration */ |
980 | 112 |
113 NULL, /* create main configuration */ | |
114 NULL, /* init main configuration */ | |
115 | |
116 NULL, /* create server configuration */ | |
117 NULL, /* merge server configuration */ | |
118 | |
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119 ngx_http_limit_conn_create_conf, /* create location configuration */ |
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120 ngx_http_limit_conn_merge_conf /* merge location configuration */ |
980 | 121 }; |
122 | |
123 | |
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124 ngx_module_t ngx_http_limit_conn_module = { |
980 | 125 NGX_MODULE_V1, |
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126 &ngx_http_limit_conn_module_ctx, /* module context */ |
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127 ngx_http_limit_conn_commands, /* module directives */ |
980 | 128 NGX_HTTP_MODULE, /* module type */ |
129 NULL, /* init master */ | |
130 NULL, /* init module */ | |
131 NULL, /* init process */ | |
132 NULL, /* init thread */ | |
133 NULL, /* exit thread */ | |
134 NULL, /* exit process */ | |
135 NULL, /* exit master */ | |
136 NGX_MODULE_V1_PADDING | |
137 }; | |
138 | |
139 | |
140 static ngx_int_t | |
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141 ngx_http_limit_conn_handler(ngx_http_request_t *r) |
980 | 142 { |
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143 size_t n; |
980 | 144 uint32_t hash; |
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145 ngx_str_t key; |
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146 ngx_uint_t i; |
980 | 147 ngx_slab_pool_t *shpool; |
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148 ngx_rbtree_node_t *node; |
980 | 149 ngx_pool_cleanup_t *cln; |
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150 ngx_http_limit_conn_ctx_t *ctx; |
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151 ngx_http_limit_conn_node_t *lc; |
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152 ngx_http_limit_conn_conf_t *lccf; |
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153 ngx_http_limit_conn_limit_t *limits; |
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154 ngx_http_limit_conn_cleanup_t *lccln; |
980 | 155 |
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156 if (r->main->limit_conn_set) { |
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157 return NGX_DECLINED; |
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158 } |
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159 |
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160 lccf = ngx_http_get_module_loc_conf(r, ngx_http_limit_conn_module); |
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161 limits = lccf->limits.elts; |
980 | 162 |
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163 for (i = 0; i < lccf->limits.nelts; i++) { |
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164 ctx = limits[i].shm_zone->data; |
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165 |
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166 if (ngx_http_complex_value(r, &ctx->key, &key) != NGX_OK) { |
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167 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
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168 } |
980 | 169 |
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170 if (key.len == 0) { |
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171 continue; |
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172 } |
980 | 173 |
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174 if (key.len > 255) { |
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175 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, |
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176 "the value of the \"%V\" key " |
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177 "is more than 255 bytes: \"%V\"", |
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178 &ctx->key.value, &key); |
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179 continue; |
980 | 180 } |
181 | |
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182 r->main->limit_conn_set = 1; |
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183 |
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184 hash = ngx_crc32_short(key.data, key.len); |
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185 |
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186 shpool = (ngx_slab_pool_t *) limits[i].shm_zone->shm.addr; |
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187 |
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188 ngx_shmtx_lock(&shpool->mutex); |
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189 |
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190 node = ngx_http_limit_conn_lookup(ctx->rbtree, &key, hash); |
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191 |
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192 if (node == NULL) { |
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193 |
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194 n = offsetof(ngx_rbtree_node_t, color) |
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195 + offsetof(ngx_http_limit_conn_node_t, data) |
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196 + key.len; |
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197 |
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198 node = ngx_slab_alloc_locked(shpool, n); |
980 | 199 |
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200 if (node == NULL) { |
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201 ngx_shmtx_unlock(&shpool->mutex); |
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202 ngx_http_limit_conn_cleanup_all(r->pool); |
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203 return lccf->status_code; |
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204 } |
2373 | 205 |
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206 lc = (ngx_http_limit_conn_node_t *) &node->color; |
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207 |
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208 node->key = hash; |
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209 lc->len = (u_char) key.len; |
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210 lc->conn = 1; |
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211 ngx_memcpy(lc->data, key.data, key.len); |
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212 |
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213 ngx_rbtree_insert(ctx->rbtree, node); |
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214 |
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215 } else { |
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216 |
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217 lc = (ngx_http_limit_conn_node_t *) &node->color; |
980 | 218 |
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219 if ((ngx_uint_t) lc->conn >= limits[i].conn) { |
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220 |
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221 ngx_shmtx_unlock(&shpool->mutex); |
980 | 222 |
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223 ngx_log_error(lccf->log_level, r->connection->log, 0, |
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224 "limiting connections by zone \"%V\"", |
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225 &limits[i].shm_zone->shm.name); |
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226 |
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227 ngx_http_limit_conn_cleanup_all(r->pool); |
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228 return lccf->status_code; |
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229 } |
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230 |
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231 lc->conn++; |
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232 } |
980 | 233 |
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234 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
6480 | 235 "limit conn: %08Xi %d", node->key, lc->conn); |
980 | 236 |
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237 ngx_shmtx_unlock(&shpool->mutex); |
980 | 238 |
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239 cln = ngx_pool_cleanup_add(r->pool, |
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240 sizeof(ngx_http_limit_conn_cleanup_t)); |
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241 if (cln == NULL) { |
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242 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
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243 } |
980 | 244 |
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245 cln->handler = ngx_http_limit_conn_cleanup; |
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246 lccln = cln->data; |
980 | 247 |
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248 lccln->shm_zone = limits[i].shm_zone; |
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249 lccln->node = node; |
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250 } |
980 | 251 |
252 return NGX_DECLINED; | |
253 } | |
254 | |
255 | |
256 static void | |
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257 ngx_http_limit_conn_rbtree_insert_value(ngx_rbtree_node_t *temp, |
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258 ngx_rbtree_node_t *node, ngx_rbtree_node_t *sentinel) |
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259 { |
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260 ngx_rbtree_node_t **p; |
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261 ngx_http_limit_conn_node_t *lcn, *lcnt; |
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262 |
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263 for ( ;; ) { |
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264 |
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265 if (node->key < temp->key) { |
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266 |
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267 p = &temp->left; |
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268 |
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269 } else if (node->key > temp->key) { |
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270 |
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271 p = &temp->right; |
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272 |
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273 } else { /* node->key == temp->key */ |
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274 |
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275 lcn = (ngx_http_limit_conn_node_t *) &node->color; |
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276 lcnt = (ngx_http_limit_conn_node_t *) &temp->color; |
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277 |
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278 p = (ngx_memn2cmp(lcn->data, lcnt->data, lcn->len, lcnt->len) < 0) |
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279 ? &temp->left : &temp->right; |
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280 } |
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281 |
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282 if (*p == sentinel) { |
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283 break; |
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284 } |
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285 |
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286 temp = *p; |
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287 } |
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288 |
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289 *p = node; |
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290 node->parent = temp; |
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291 node->left = sentinel; |
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292 node->right = sentinel; |
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293 ngx_rbt_red(node); |
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294 } |
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295 |
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296 |
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297 static ngx_rbtree_node_t * |
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298 ngx_http_limit_conn_lookup(ngx_rbtree_t *rbtree, ngx_str_t *key, uint32_t hash) |
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299 { |
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300 ngx_int_t rc; |
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301 ngx_rbtree_node_t *node, *sentinel; |
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302 ngx_http_limit_conn_node_t *lcn; |
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303 |
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304 node = rbtree->root; |
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305 sentinel = rbtree->sentinel; |
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306 |
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307 while (node != sentinel) { |
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308 |
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309 if (hash < node->key) { |
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310 node = node->left; |
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311 continue; |
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312 } |
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313 |
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314 if (hash > node->key) { |
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315 node = node->right; |
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316 continue; |
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317 } |
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318 |
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319 /* hash == node->key */ |
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320 |
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321 lcn = (ngx_http_limit_conn_node_t *) &node->color; |
4270
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322 |
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323 rc = ngx_memn2cmp(key->data, lcn->data, key->len, (size_t) lcn->len); |
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324 |
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325 if (rc == 0) { |
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Fix of rbtree lookup on hash collisions.
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326 return node; |
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327 } |
4270
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328 |
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329 node = (rc < 0) ? node->left : node->right; |
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330 } |
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331 |
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332 return NULL; |
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333 } |
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334 |
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335 |
1026
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336 static void |
4280
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337 ngx_http_limit_conn_cleanup(void *data) |
980 | 338 { |
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339 ngx_http_limit_conn_cleanup_t *lccln = data; |
980 | 340 |
341 ngx_slab_pool_t *shpool; | |
342 ngx_rbtree_node_t *node; | |
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343 ngx_http_limit_conn_ctx_t *ctx; |
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344 ngx_http_limit_conn_node_t *lc; |
980 | 345 |
4280
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346 ctx = lccln->shm_zone->data; |
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347 shpool = (ngx_slab_pool_t *) lccln->shm_zone->shm.addr; |
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348 node = lccln->node; |
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349 lc = (ngx_http_limit_conn_node_t *) &node->color; |
980 | 350 |
351 ngx_shmtx_lock(&shpool->mutex); | |
352 | |
4280
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353 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, lccln->shm_zone->shm.log, 0, |
6480 | 354 "limit conn cleanup: %08Xi %d", node->key, lc->conn); |
980 | 355 |
4280
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356 lc->conn--; |
980 | 357 |
4280
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358 if (lc->conn == 0) { |
987 | 359 ngx_rbtree_delete(ctx->rbtree, node); |
980 | 360 ngx_slab_free_locked(shpool, node); |
361 } | |
362 | |
363 ngx_shmtx_unlock(&shpool->mutex); | |
364 } | |
365 | |
366 | |
4271
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367 static ngx_inline void |
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368 ngx_http_limit_conn_cleanup_all(ngx_pool_t *pool) |
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369 { |
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370 ngx_pool_cleanup_t *cln; |
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371 |
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372 cln = pool->cleanup; |
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373 |
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374 while (cln && cln->handler == ngx_http_limit_conn_cleanup) { |
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|
375 ngx_http_limit_conn_cleanup(cln->data); |
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376 cln = cln->next; |
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377 } |
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378 |
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379 pool->cleanup = cln; |
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380 } |
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381 |
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382 |
980 | 383 static ngx_int_t |
4280
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diff
changeset
|
384 ngx_http_limit_conn_init_zone(ngx_shm_zone_t *shm_zone, void *data) |
980 | 385 { |
4280
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Renamed ngx_http_limit_zone_module to ngx_http_limit_conn_module.
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|
386 ngx_http_limit_conn_ctx_t *octx = data; |
993
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diff
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|
387 |
2611
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changeset
|
388 size_t len; |
987 | 389 ngx_slab_pool_t *shpool; |
390 ngx_rbtree_node_t *sentinel; | |
4280
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Renamed ngx_http_limit_zone_module to ngx_http_limit_conn_module.
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diff
changeset
|
391 ngx_http_limit_conn_ctx_t *ctx; |
980 | 392 |
993
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pass the inherited shm_zone data
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diff
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|
393 ctx = shm_zone->data; |
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394 |
1b9a4d92173f
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|
395 if (octx) { |
5860
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Limit conn: use complex value in limit_conn_zone (ticket #121).
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|
396 if (ctx->key.value.len != octx->key.value.len |
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397 || ngx_strncmp(ctx->key.value.data, octx->key.value.data, |
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Limit conn: use complex value in limit_conn_zone (ticket #121).
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changeset
|
398 ctx->key.value.len) |
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Limit conn: use complex value in limit_conn_zone (ticket #121).
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|
399 != 0) |
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|
400 { |
993
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|
401 ngx_log_error(NGX_LOG_EMERG, shm_zone->shm.log, 0, |
5860
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Limit conn: use complex value in limit_conn_zone (ticket #121).
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diff
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|
402 "limit_conn_zone \"%V\" uses the \"%V\" key " |
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Limit conn: use complex value in limit_conn_zone (ticket #121).
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|
403 "while previously it used the \"%V\" key", |
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Limit conn: use complex value in limit_conn_zone (ticket #121).
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diff
changeset
|
404 &shm_zone->shm.name, &ctx->key.value, |
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Limit conn: use complex value in limit_conn_zone (ticket #121).
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changeset
|
405 &octx->key.value); |
993
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pass the inherited shm_zone data
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diff
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|
406 return NGX_ERROR; |
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|
407 } |
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|
408 |
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changeset
|
409 ctx->rbtree = octx->rbtree; |
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410 |
1b9a4d92173f
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diff
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|
411 return NGX_OK; |
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diff
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|
412 } |
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987
diff
changeset
|
413 |
980 | 414 shpool = (ngx_slab_pool_t *) shm_zone->shm.addr; |
415 | |
2720
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support attaching to an existent Win32 shared memory
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|
416 if (shm_zone->shm.exists) { |
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support attaching to an existent Win32 shared memory
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|
417 ctx->rbtree = shpool->data; |
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support attaching to an existent Win32 shared memory
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|
418 |
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419 return NGX_OK; |
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|
420 } |
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diff
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|
421 |
987 | 422 ctx->rbtree = ngx_slab_alloc(shpool, sizeof(ngx_rbtree_t)); |
423 if (ctx->rbtree == NULL) { | |
980 | 424 return NGX_ERROR; |
425 } | |
426 | |
2720
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|
427 shpool->data = ctx->rbtree; |
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diff
changeset
|
428 |
980 | 429 sentinel = ngx_slab_alloc(shpool, sizeof(ngx_rbtree_node_t)); |
430 if (sentinel == NULL) { | |
431 return NGX_ERROR; | |
432 } | |
433 | |
1743
4fc402c3ec73
optimize rbtree initialization and insert
Igor Sysoev <igor@sysoev.ru>
parents:
1406
diff
changeset
|
434 ngx_rbtree_init(ctx->rbtree, sentinel, |
4280
91874133fb27
Renamed ngx_http_limit_zone_module to ngx_http_limit_conn_module.
Valentin Bartenev <vbart@nginx.com>
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4272
diff
changeset
|
435 ngx_http_limit_conn_rbtree_insert_value); |
980 | 436 |
4272
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
437 len = sizeof(" in limit_conn_zone \"\"") + shm_zone->shm.name.len; |
2611
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improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
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changeset
|
438 |
2bce3f6416c6
improve ngx_slab_alloc() error logging
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changeset
|
439 shpool->log_ctx = ngx_slab_alloc(shpool, len); |
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improve ngx_slab_alloc() error logging
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changeset
|
440 if (shpool->log_ctx == NULL) { |
2bce3f6416c6
improve ngx_slab_alloc() error logging
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changeset
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441 return NGX_ERROR; |
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improve ngx_slab_alloc() error logging
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|
442 } |
2bce3f6416c6
improve ngx_slab_alloc() error logging
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changeset
|
443 |
4272
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
444 ngx_sprintf(shpool->log_ctx, " in limit_conn_zone \"%V\"%Z", |
2716
d5896f6608e8
move zone name from ngx_shm_zone_t to ngx_shm_t to use Win32 shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
2612
diff
changeset
|
445 &shm_zone->shm.name); |
2611
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2373
diff
changeset
|
446 |
980 | 447 return NGX_OK; |
448 } | |
449 | |
450 | |
451 static void * | |
4280
91874133fb27
Renamed ngx_http_limit_zone_module to ngx_http_limit_conn_module.
Valentin Bartenev <vbart@nginx.com>
parents:
4272
diff
changeset
|
452 ngx_http_limit_conn_create_conf(ngx_conf_t *cf) |
980 | 453 { |
4280
91874133fb27
Renamed ngx_http_limit_zone_module to ngx_http_limit_conn_module.
Valentin Bartenev <vbart@nginx.com>
parents:
4272
diff
changeset
|
454 ngx_http_limit_conn_conf_t *conf; |
980 | 455 |
4280
91874133fb27
Renamed ngx_http_limit_zone_module to ngx_http_limit_conn_module.
Valentin Bartenev <vbart@nginx.com>
parents:
4272
diff
changeset
|
456 conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_limit_conn_conf_t)); |
980 | 457 if (conf == NULL) { |
2912
c7d57b539248
return NULL instead of NGX_CONF_ERROR on a create conf failure
Igor Sysoev <igor@sysoev.ru>
parents:
2720
diff
changeset
|
458 return NULL; |
980 | 459 } |
460 | |
461 /* | |
462 * set by ngx_pcalloc(): | |
463 * | |
4271
b86cceba426a
Limit zone: support for multiple "limit_conn" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4270
diff
changeset
|
464 * conf->limits.elts = NULL; |
980 | 465 */ |
466 | |
3186 | 467 conf->log_level = NGX_CONF_UNSET_UINT; |
5117
00e4459739ed
The limit_req_status and limit_conn_status directives.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4972
diff
changeset
|
468 conf->status_code = NGX_CONF_UNSET_UINT; |
3186 | 469 |
980 | 470 return conf; |
471 } | |
472 | |
473 | |
474 static char * | |
4280
91874133fb27
Renamed ngx_http_limit_zone_module to ngx_http_limit_conn_module.
Valentin Bartenev <vbart@nginx.com>
parents:
4272
diff
changeset
|
475 ngx_http_limit_conn_merge_conf(ngx_conf_t *cf, void *parent, void *child) |
980 | 476 { |
4280
91874133fb27
Renamed ngx_http_limit_zone_module to ngx_http_limit_conn_module.
Valentin Bartenev <vbart@nginx.com>
parents:
4272
diff
changeset
|
477 ngx_http_limit_conn_conf_t *prev = parent; |
91874133fb27
Renamed ngx_http_limit_zone_module to ngx_http_limit_conn_module.
Valentin Bartenev <vbart@nginx.com>
parents:
4272
diff
changeset
|
478 ngx_http_limit_conn_conf_t *conf = child; |
980 | 479 |
4271
b86cceba426a
Limit zone: support for multiple "limit_conn" limits.
Valentin Bartenev <vbart@nginx.com>
parents:
4270
diff
changeset
|
480 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
|
481 conf->limits = prev->limits; |
980 | 482 } |
483 | |
3186 | 484 ngx_conf_merge_uint_value(conf->log_level, prev->log_level, NGX_LOG_ERR); |
5117
00e4459739ed
The limit_req_status and limit_conn_status directives.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4972
diff
changeset
|
485 ngx_conf_merge_uint_value(conf->status_code, prev->status_code, |
00e4459739ed
The limit_req_status and limit_conn_status directives.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4972
diff
changeset
|
486 NGX_HTTP_SERVICE_UNAVAILABLE); |
3186 | 487 |
980 | 488 return NGX_CONF_OK; |
489 } | |
490 | |
491 | |
492 static char * | |
4272
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
493 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:
4271
diff
changeset
|
494 { |
5860
c9787372f16d
Limit conn: use complex value in limit_conn_zone (ticket #121).
Valentin Bartenev <vbart@nginx.com>
parents:
5859
diff
changeset
|
495 u_char *p; |
c9787372f16d
Limit conn: use complex value in limit_conn_zone (ticket #121).
Valentin Bartenev <vbart@nginx.com>
parents:
5859
diff
changeset
|
496 ssize_t size; |
c9787372f16d
Limit conn: use complex value in limit_conn_zone (ticket #121).
Valentin Bartenev <vbart@nginx.com>
parents:
5859
diff
changeset
|
497 ngx_str_t *value, name, s; |
c9787372f16d
Limit conn: use complex value in limit_conn_zone (ticket #121).
Valentin Bartenev <vbart@nginx.com>
parents:
5859
diff
changeset
|
498 ngx_uint_t i; |
c9787372f16d
Limit conn: use complex value in limit_conn_zone (ticket #121).
Valentin Bartenev <vbart@nginx.com>
parents:
5859
diff
changeset
|
499 ngx_shm_zone_t *shm_zone; |
c9787372f16d
Limit conn: use complex value in limit_conn_zone (ticket #121).
Valentin Bartenev <vbart@nginx.com>
parents:
5859
diff
changeset
|
500 ngx_http_limit_conn_ctx_t *ctx; |
c9787372f16d
Limit conn: use complex value in limit_conn_zone (ticket #121).
Valentin Bartenev <vbart@nginx.com>
parents:
5859
diff
changeset
|
501 ngx_http_compile_complex_value_t ccv; |
4272
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
502 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
503 value = cf->args->elts; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
504 |
5860
c9787372f16d
Limit conn: use complex value in limit_conn_zone (ticket #121).
Valentin Bartenev <vbart@nginx.com>
parents:
5859
diff
changeset
|
505 ctx = ngx_pcalloc(cf->pool, sizeof(ngx_http_limit_conn_ctx_t)); |
c9787372f16d
Limit conn: use complex value in limit_conn_zone (ticket #121).
Valentin Bartenev <vbart@nginx.com>
parents:
5859
diff
changeset
|
506 if (ctx == NULL) { |
c9787372f16d
Limit conn: use complex value in limit_conn_zone (ticket #121).
Valentin Bartenev <vbart@nginx.com>
parents:
5859
diff
changeset
|
507 return NGX_CONF_ERROR; |
c9787372f16d
Limit conn: use complex value in limit_conn_zone (ticket #121).
Valentin Bartenev <vbart@nginx.com>
parents:
5859
diff
changeset
|
508 } |
c9787372f16d
Limit conn: use complex value in limit_conn_zone (ticket #121).
Valentin Bartenev <vbart@nginx.com>
parents:
5859
diff
changeset
|
509 |
c9787372f16d
Limit conn: use complex value in limit_conn_zone (ticket #121).
Valentin Bartenev <vbart@nginx.com>
parents:
5859
diff
changeset
|
510 ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t)); |
c9787372f16d
Limit conn: use complex value in limit_conn_zone (ticket #121).
Valentin Bartenev <vbart@nginx.com>
parents:
5859
diff
changeset
|
511 |
c9787372f16d
Limit conn: use complex value in limit_conn_zone (ticket #121).
Valentin Bartenev <vbart@nginx.com>
parents:
5859
diff
changeset
|
512 ccv.cf = cf; |
c9787372f16d
Limit conn: use complex value in limit_conn_zone (ticket #121).
Valentin Bartenev <vbart@nginx.com>
parents:
5859
diff
changeset
|
513 ccv.value = &value[1]; |
c9787372f16d
Limit conn: use complex value in limit_conn_zone (ticket #121).
Valentin Bartenev <vbart@nginx.com>
parents:
5859
diff
changeset
|
514 ccv.complex_value = &ctx->key; |
c9787372f16d
Limit conn: use complex value in limit_conn_zone (ticket #121).
Valentin Bartenev <vbart@nginx.com>
parents:
5859
diff
changeset
|
515 |
c9787372f16d
Limit conn: use complex value in limit_conn_zone (ticket #121).
Valentin Bartenev <vbart@nginx.com>
parents:
5859
diff
changeset
|
516 if (ngx_http_compile_complex_value(&ccv) != NGX_OK) { |
c9787372f16d
Limit conn: use complex value in limit_conn_zone (ticket #121).
Valentin Bartenev <vbart@nginx.com>
parents:
5859
diff
changeset
|
517 return NGX_CONF_ERROR; |
c9787372f16d
Limit conn: use complex value in limit_conn_zone (ticket #121).
Valentin Bartenev <vbart@nginx.com>
parents:
5859
diff
changeset
|
518 } |
c9787372f16d
Limit conn: use complex value in limit_conn_zone (ticket #121).
Valentin Bartenev <vbart@nginx.com>
parents:
5859
diff
changeset
|
519 |
4272
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
520 size = 0; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
521 name.len = 0; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
522 |
5860
c9787372f16d
Limit conn: use complex value in limit_conn_zone (ticket #121).
Valentin Bartenev <vbart@nginx.com>
parents:
5859
diff
changeset
|
523 for (i = 2; i < cf->args->nelts; i++) { |
4272
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
524 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
525 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
|
526 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
527 name.data = value[i].data + 5; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
528 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
529 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
|
530 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
531 if (p == NULL) { |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
532 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
|
533 "invalid zone size \"%V\"", &value[i]); |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
534 return NGX_CONF_ERROR; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
535 } |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
536 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
537 name.len = p - name.data; |
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 s.data = p + 1; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
540 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
|
541 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
542 size = ngx_parse_size(&s); |
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 if (size == NGX_ERROR) { |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
545 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
|
546 "invalid zone size \"%V\"", &value[i]); |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
547 return NGX_CONF_ERROR; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
548 } |
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 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
|
551 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
|
552 "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
|
553 return NGX_CONF_ERROR; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
554 } |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
555 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
556 continue; |
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 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
559 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
|
560 "invalid parameter \"%V\"", &value[i]); |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
561 return NGX_CONF_ERROR; |
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 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
564 if (name.len == 0) { |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
565 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
|
566 "\"%V\" must have \"zone\" parameter", |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
567 &cmd->name); |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
568 return NGX_CONF_ERROR; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
569 } |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
570 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
571 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
|
572 &ngx_http_limit_conn_module); |
4272
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
573 if (shm_zone == NULL) { |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
574 return NGX_CONF_ERROR; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
575 } |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
576 |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
577 if (shm_zone->data) { |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
578 ctx = shm_zone->data; |
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 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
5860
c9787372f16d
Limit conn: use complex value in limit_conn_zone (ticket #121).
Valentin Bartenev <vbart@nginx.com>
parents:
5859
diff
changeset
|
581 "%V \"%V\" is already bound to key \"%V\"", |
c9787372f16d
Limit conn: use complex value in limit_conn_zone (ticket #121).
Valentin Bartenev <vbart@nginx.com>
parents:
5859
diff
changeset
|
582 &cmd->name, &name, &ctx->key.value); |
4272
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
parents:
4271
diff
changeset
|
583 return NGX_CONF_ERROR; |
260d591cb6a3
Limit zone: added the "limit_conn_zone" directive.
Valentin Bartenev <vbart@nginx.com>
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584 } |
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585 |
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586 shm_zone->init = ngx_http_limit_conn_init_zone; |
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587 shm_zone->data = ctx; |
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588 |
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589 return NGX_CONF_OK; |
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590 } |
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591 |
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592 |
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593 static char * |
980 | 594 ngx_http_limit_conn(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) |
595 { | |
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596 ngx_shm_zone_t *shm_zone; |
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597 ngx_http_limit_conn_conf_t *lccf = conf; |
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598 ngx_http_limit_conn_limit_t *limit, *limits; |
980 | 599 |
600 ngx_str_t *value; | |
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601 ngx_int_t n; |
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602 ngx_uint_t i; |
2372 | 603 |
980 | 604 value = cf->args->elts; |
605 | |
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606 shm_zone = ngx_shared_memory_add(cf, &value[1], 0, |
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607 &ngx_http_limit_conn_module); |
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608 if (shm_zone == NULL) { |
980 | 609 return NGX_CONF_ERROR; |
610 } | |
611 | |
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612 limits = lccf->limits.elts; |
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613 |
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614 if (limits == NULL) { |
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615 if (ngx_array_init(&lccf->limits, cf->pool, 1, |
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616 sizeof(ngx_http_limit_conn_limit_t)) |
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617 != NGX_OK) |
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618 { |
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619 return NGX_CONF_ERROR; |
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620 } |
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621 } |
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622 |
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623 for (i = 0; i < lccf->limits.nelts; i++) { |
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624 if (shm_zone == limits[i].shm_zone) { |
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625 return "is duplicate"; |
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626 } |
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627 } |
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628 |
987 | 629 n = ngx_atoi(value[2].data, value[2].len); |
630 if (n <= 0) { | |
980 | 631 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
987 | 632 "invalid number of connections \"%V\"", &value[2]); |
980 | 633 return NGX_CONF_ERROR; |
634 } | |
635 | |
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636 if (n > 65535) { |
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637 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
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638 "connection limit must be less 65536"); |
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639 return NGX_CONF_ERROR; |
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640 } |
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641 |
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642 limit = ngx_array_push(&lccf->limits); |
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643 if (limit == NULL) { |
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644 return NGX_CONF_ERROR; |
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645 } |
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646 |
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647 limit->conn = n; |
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648 limit->shm_zone = shm_zone; |
980 | 649 |
650 return NGX_CONF_OK; | |
651 } | |
652 | |
653 | |
654 static ngx_int_t | |
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655 ngx_http_limit_conn_init(ngx_conf_t *cf) |
980 | 656 { |
657 ngx_http_handler_pt *h; | |
658 ngx_http_core_main_conf_t *cmcf; | |
659 | |
660 cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module); | |
661 | |
662 h = ngx_array_push(&cmcf->phases[NGX_HTTP_PREACCESS_PHASE].handlers); | |
663 if (h == NULL) { | |
664 return NGX_ERROR; | |
665 } | |
666 | |
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667 *h = ngx_http_limit_conn_handler; |
980 | 668 |
669 return NGX_OK; | |
670 } |