Mercurial > hg > nginx
annotate src/http/modules/ngx_http_limit_zone_module.c @ 4517:50143b8fb95f stable-1.0
Merge of r4500: fixed spelling in single-line comments.
| author | Maxim Dounin <mdounin@mdounin.ru> |
|---|---|
| date | Mon, 05 Mar 2012 13:26:40 +0000 |
| parents | 8bb695c05870 |
| children |
| rev | line source |
|---|---|
| 980 | 1 |
| 2 /* | |
| 3 * Copyright (C) Igor Sysoev | |
|
4450
4919fb357a5d
Merge of r4406, r4413: copyrights updated.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4440
diff
changeset
|
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]; | |
| 18 } ngx_http_limit_zone_node_t; | |
| 19 | |
| 20 | |
| 21 typedef struct { | |
| 22 ngx_shm_zone_t *shm_zone; | |
| 23 ngx_rbtree_node_t *node; | |
| 24 } ngx_http_limit_zone_cleanup_t; | |
| 25 | |
| 26 | |
| 27 typedef struct { | |
| 987 | 28 ngx_rbtree_t *rbtree; |
| 29 ngx_int_t index; | |
| 30 ngx_str_t var; | |
| 31 } ngx_http_limit_zone_ctx_t; | |
| 32 | |
| 33 | |
| 34 typedef struct { | |
| 980 | 35 ngx_shm_zone_t *shm_zone; |
| 36 ngx_uint_t conn; | |
| 3186 | 37 ngx_uint_t log_level; |
| 980 | 38 } ngx_http_limit_zone_conf_t; |
| 39 | |
| 40 | |
| 41 static void ngx_http_limit_zone_cleanup(void *data); | |
| 42 | |
| 43 static void *ngx_http_limit_zone_create_conf(ngx_conf_t *cf); | |
| 44 static char *ngx_http_limit_zone_merge_conf(ngx_conf_t *cf, void *parent, | |
| 45 void *child); | |
| 46 static char *ngx_http_limit_zone(ngx_conf_t *cf, ngx_command_t *cmd, | |
| 47 void *conf); | |
| 48 static char *ngx_http_limit_conn(ngx_conf_t *cf, ngx_command_t *cmd, | |
| 49 void *conf); | |
| 50 static ngx_int_t ngx_http_limit_zone_init(ngx_conf_t *cf); | |
| 51 | |
| 52 | |
| 3186 | 53 static ngx_conf_enum_t ngx_http_limit_conn_log_levels[] = { |
| 54 { ngx_string("info"), NGX_LOG_INFO }, | |
| 55 { ngx_string("notice"), NGX_LOG_NOTICE }, | |
| 56 { ngx_string("warn"), NGX_LOG_WARN }, | |
| 57 { ngx_string("error"), NGX_LOG_ERR }, | |
| 58 { ngx_null_string, 0 } | |
| 59 }; | |
| 60 | |
| 61 | |
| 980 | 62 static ngx_command_t ngx_http_limit_zone_commands[] = { |
| 63 | |
| 64 { ngx_string("limit_zone"), | |
| 987 | 65 NGX_HTTP_MAIN_CONF|NGX_CONF_TAKE3, |
| 980 | 66 ngx_http_limit_zone, |
| 67 0, | |
| 68 0, | |
| 69 NULL }, | |
| 70 | |
| 71 { ngx_string("limit_conn"), | |
| 987 | 72 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE2, |
| 980 | 73 ngx_http_limit_conn, |
| 74 NGX_HTTP_LOC_CONF_OFFSET, | |
| 75 0, | |
| 76 NULL }, | |
| 77 | |
| 3186 | 78 { ngx_string("limit_conn_log_level"), |
| 79 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, | |
| 80 ngx_conf_set_enum_slot, | |
| 81 NGX_HTTP_LOC_CONF_OFFSET, | |
| 82 offsetof(ngx_http_limit_zone_conf_t, log_level), | |
| 83 &ngx_http_limit_conn_log_levels }, | |
| 84 | |
| 980 | 85 ngx_null_command |
| 86 }; | |
| 87 | |
| 88 | |
| 89 static ngx_http_module_t ngx_http_limit_zone_module_ctx = { | |
| 90 NULL, /* preconfiguration */ | |
| 91 ngx_http_limit_zone_init, /* postconfiguration */ | |
| 92 | |
| 93 NULL, /* create main configuration */ | |
| 94 NULL, /* init main configuration */ | |
| 95 | |
| 96 NULL, /* create server configuration */ | |
| 97 NULL, /* merge server configuration */ | |
| 98 | |
|
4517
50143b8fb95f
Merge of r4500: fixed spelling in single-line comments.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4515
diff
changeset
|
99 ngx_http_limit_zone_create_conf, /* create location configuration */ |
|
50143b8fb95f
Merge of r4500: fixed spelling in single-line comments.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4515
diff
changeset
|
100 ngx_http_limit_zone_merge_conf /* merge location configuration */ |
| 980 | 101 }; |
| 102 | |
| 103 | |
| 104 ngx_module_t ngx_http_limit_zone_module = { | |
| 105 NGX_MODULE_V1, | |
| 106 &ngx_http_limit_zone_module_ctx, /* module context */ | |
| 107 ngx_http_limit_zone_commands, /* module directives */ | |
| 108 NGX_HTTP_MODULE, /* module type */ | |
| 109 NULL, /* init master */ | |
| 110 NULL, /* init module */ | |
| 111 NULL, /* init process */ | |
| 112 NULL, /* init thread */ | |
| 113 NULL, /* exit thread */ | |
| 114 NULL, /* exit process */ | |
| 115 NULL, /* exit master */ | |
| 116 NGX_MODULE_V1_PADDING | |
| 117 }; | |
| 118 | |
| 119 | |
| 120 static ngx_int_t | |
| 121 ngx_http_limit_zone_handler(ngx_http_request_t *r) | |
| 122 { | |
| 123 size_t len, n; | |
| 124 uint32_t hash; | |
|
1026
38be15c1379a
fix duplicate rbtree keys case
Igor Sysoev <igor@sysoev.ru>
parents:
1012
diff
changeset
|
125 ngx_int_t rc; |
| 980 | 126 ngx_slab_pool_t *shpool; |
| 127 ngx_rbtree_node_t *node, *sentinel; | |
| 128 ngx_pool_cleanup_t *cln; | |
| 129 ngx_http_variable_value_t *vv; | |
| 987 | 130 ngx_http_limit_zone_ctx_t *ctx; |
| 980 | 131 ngx_http_limit_zone_node_t *lz; |
| 132 ngx_http_limit_zone_conf_t *lzcf; | |
| 133 ngx_http_limit_zone_cleanup_t *lzcln; | |
| 134 | |
|
997
5900ec20604a
do not count connection for subrequest
Igor Sysoev <igor@sysoev.ru>
parents:
993
diff
changeset
|
135 if (r->main->limit_zone_set) { |
|
984
dd128232e6ba
count connection once per request
Igor Sysoev <igor@sysoev.ru>
parents:
981
diff
changeset
|
136 return NGX_DECLINED; |
|
dd128232e6ba
count connection once per request
Igor Sysoev <igor@sysoev.ru>
parents:
981
diff
changeset
|
137 } |
|
dd128232e6ba
count connection once per request
Igor Sysoev <igor@sysoev.ru>
parents:
981
diff
changeset
|
138 |
| 980 | 139 lzcf = ngx_http_get_module_loc_conf(r, ngx_http_limit_zone_module); |
| 140 | |
| 141 if (lzcf->shm_zone == NULL) { | |
| 142 return NGX_DECLINED; | |
| 143 } | |
| 144 | |
| 987 | 145 ctx = lzcf->shm_zone->data; |
| 146 | |
| 147 vv = ngx_http_get_indexed_variable(r, ctx->index); | |
| 980 | 148 |
| 149 if (vv == NULL || vv->not_found) { | |
| 150 return NGX_DECLINED; | |
| 151 } | |
| 152 | |
|
1011
19118c44303f
test length of variable and number of connections
Igor Sysoev <igor@sysoev.ru>
parents:
1002
diff
changeset
|
153 len = vv->len; |
|
19118c44303f
test length of variable and number of connections
Igor Sysoev <igor@sysoev.ru>
parents:
1002
diff
changeset
|
154 |
|
19118c44303f
test length of variable and number of connections
Igor Sysoev <igor@sysoev.ru>
parents:
1002
diff
changeset
|
155 if (len == 0) { |
|
19118c44303f
test length of variable and number of connections
Igor Sysoev <igor@sysoev.ru>
parents:
1002
diff
changeset
|
156 return NGX_DECLINED; |
|
19118c44303f
test length of variable and number of connections
Igor Sysoev <igor@sysoev.ru>
parents:
1002
diff
changeset
|
157 } |
|
984
dd128232e6ba
count connection once per request
Igor Sysoev <igor@sysoev.ru>
parents:
981
diff
changeset
|
158 |
|
1011
19118c44303f
test length of variable and number of connections
Igor Sysoev <igor@sysoev.ru>
parents:
1002
diff
changeset
|
159 if (len > 255) { |
|
19118c44303f
test length of variable and number of connections
Igor Sysoev <igor@sysoev.ru>
parents:
1002
diff
changeset
|
160 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, |
|
19118c44303f
test length of variable and number of connections
Igor Sysoev <igor@sysoev.ru>
parents:
1002
diff
changeset
|
161 "the value of the \"%V\" variable " |
|
1406
03341711f9a2
use %v for ngx_variable_value_t in ngx_sprintf(),
Igor Sysoev <igor@sysoev.ru>
parents:
1036
diff
changeset
|
162 "is more than 255 bytes: \"%v\"", |
|
1011
19118c44303f
test length of variable and number of connections
Igor Sysoev <igor@sysoev.ru>
parents:
1002
diff
changeset
|
163 &ctx->var, vv); |
|
19118c44303f
test length of variable and number of connections
Igor Sysoev <igor@sysoev.ru>
parents:
1002
diff
changeset
|
164 return NGX_DECLINED; |
|
19118c44303f
test length of variable and number of connections
Igor Sysoev <igor@sysoev.ru>
parents:
1002
diff
changeset
|
165 } |
|
19118c44303f
test length of variable and number of connections
Igor Sysoev <igor@sysoev.ru>
parents:
1002
diff
changeset
|
166 |
|
19118c44303f
test length of variable and number of connections
Igor Sysoev <igor@sysoev.ru>
parents:
1002
diff
changeset
|
167 r->main->limit_zone_set = 1; |
| 980 | 168 |
| 169 hash = ngx_crc32_short(vv->data, len); | |
| 170 | |
| 171 cln = ngx_pool_cleanup_add(r->pool, sizeof(ngx_http_limit_zone_cleanup_t)); | |
| 172 if (cln == NULL) { | |
| 173 return NGX_HTTP_INTERNAL_SERVER_ERROR; | |
| 174 } | |
| 175 | |
| 176 shpool = (ngx_slab_pool_t *) lzcf->shm_zone->shm.addr; | |
| 177 | |
| 178 ngx_shmtx_lock(&shpool->mutex); | |
| 179 | |
| 987 | 180 node = ctx->rbtree->root; |
| 181 sentinel = ctx->rbtree->sentinel; | |
| 980 | 182 |
| 183 while (node != sentinel) { | |
| 184 | |
| 185 if (hash < node->key) { | |
| 186 node = node->left; | |
| 187 continue; | |
| 188 } | |
| 189 | |
| 190 if (hash > node->key) { | |
| 191 node = node->right; | |
| 192 continue; | |
| 193 } | |
| 194 | |
|
1012
11ffb8e4753f
stop rbtree search early if equal hash was found
Igor Sysoev <igor@sysoev.ru>
parents:
1011
diff
changeset
|
195 /* hash == node->key */ |
|
11ffb8e4753f
stop rbtree search early if equal hash was found
Igor Sysoev <igor@sysoev.ru>
parents:
1011
diff
changeset
|
196 |
| 4515 | 197 lz = (ngx_http_limit_zone_node_t *) &node->color; |
| 980 | 198 |
| 4515 | 199 rc = ngx_memn2cmp(vv->data, lz->data, len, (size_t) lz->len); |
|
1026
38be15c1379a
fix duplicate rbtree keys case
Igor Sysoev <igor@sysoev.ru>
parents:
1012
diff
changeset
|
200 |
| 4515 | 201 if (rc == 0) { |
| 202 if ((ngx_uint_t) lz->conn < lzcf->conn) { | |
| 203 lz->conn++; | |
| 204 goto done; | |
| 980 | 205 } |
|
1012
11ffb8e4753f
stop rbtree search early if equal hash was found
Igor Sysoev <igor@sysoev.ru>
parents:
1011
diff
changeset
|
206 |
| 4515 | 207 ngx_shmtx_unlock(&shpool->mutex); |
|
1012
11ffb8e4753f
stop rbtree search early if equal hash was found
Igor Sysoev <igor@sysoev.ru>
parents:
1011
diff
changeset
|
208 |
| 4515 | 209 ngx_log_error(lzcf->log_level, r->connection->log, 0, |
| 210 "limiting connections by zone \"%V\"", | |
| 211 &lzcf->shm_zone->shm.name); | |
|
1012
11ffb8e4753f
stop rbtree search early if equal hash was found
Igor Sysoev <igor@sysoev.ru>
parents:
1011
diff
changeset
|
212 |
| 4515 | 213 return NGX_HTTP_SERVICE_UNAVAILABLE; |
| 214 } | |
| 215 | |
| 216 node = (rc < 0) ? node->left : node->right; | |
| 980 | 217 } |
| 218 | |
| 981 | 219 n = offsetof(ngx_rbtree_node_t, color) |
| 980 | 220 + offsetof(ngx_http_limit_zone_node_t, data) |
| 221 + len; | |
| 222 | |
| 223 node = ngx_slab_alloc_locked(shpool, n); | |
| 224 if (node == NULL) { | |
| 225 ngx_shmtx_unlock(&shpool->mutex); | |
| 226 return NGX_HTTP_SERVICE_UNAVAILABLE; | |
| 227 } | |
| 228 | |
| 981 | 229 lz = (ngx_http_limit_zone_node_t *) &node->color; |
| 980 | 230 |
| 231 node->key = hash; | |
| 981 | 232 lz->len = (u_char) len; |
| 980 | 233 lz->conn = 1; |
| 234 ngx_memcpy(lz->data, vv->data, len); | |
| 235 | |
| 987 | 236 ngx_rbtree_insert(ctx->rbtree, node); |
| 980 | 237 |
| 238 done: | |
| 239 | |
| 240 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
| 241 "limit zone: %08XD %d", node->key, lz->conn); | |
| 242 | |
| 243 ngx_shmtx_unlock(&shpool->mutex); | |
| 244 | |
| 245 cln->handler = ngx_http_limit_zone_cleanup; | |
| 246 lzcln = cln->data; | |
| 247 | |
| 248 lzcln->shm_zone = lzcf->shm_zone; | |
| 249 lzcln->node = node; | |
| 250 | |
| 251 return NGX_DECLINED; | |
| 252 } | |
| 253 | |
| 254 | |
| 255 static void | |
|
1026
38be15c1379a
fix duplicate rbtree keys case
Igor Sysoev <igor@sysoev.ru>
parents:
1012
diff
changeset
|
256 ngx_http_limit_zone_rbtree_insert_value(ngx_rbtree_node_t *temp, |
|
38be15c1379a
fix duplicate rbtree keys case
Igor Sysoev <igor@sysoev.ru>
parents:
1012
diff
changeset
|
257 ngx_rbtree_node_t *node, ngx_rbtree_node_t *sentinel) |
|
38be15c1379a
fix duplicate rbtree keys case
Igor Sysoev <igor@sysoev.ru>
parents:
1012
diff
changeset
|
258 { |
|
1743
4fc402c3ec73
optimize rbtree initialization and insert
Igor Sysoev <igor@sysoev.ru>
parents:
1406
diff
changeset
|
259 ngx_rbtree_node_t **p; |
|
4fc402c3ec73
optimize rbtree initialization and insert
Igor Sysoev <igor@sysoev.ru>
parents:
1406
diff
changeset
|
260 ngx_http_limit_zone_node_t *lzn, *lznt; |
|
1026
38be15c1379a
fix duplicate rbtree keys case
Igor Sysoev <igor@sysoev.ru>
parents:
1012
diff
changeset
|
261 |
|
38be15c1379a
fix duplicate rbtree keys case
Igor Sysoev <igor@sysoev.ru>
parents:
1012
diff
changeset
|
262 for ( ;; ) { |
|
38be15c1379a
fix duplicate rbtree keys case
Igor Sysoev <igor@sysoev.ru>
parents:
1012
diff
changeset
|
263 |
|
38be15c1379a
fix duplicate rbtree keys case
Igor Sysoev <igor@sysoev.ru>
parents:
1012
diff
changeset
|
264 if (node->key < temp->key) { |
|
38be15c1379a
fix duplicate rbtree keys case
Igor Sysoev <igor@sysoev.ru>
parents:
1012
diff
changeset
|
265 |
|
1743
4fc402c3ec73
optimize rbtree initialization and insert
Igor Sysoev <igor@sysoev.ru>
parents:
1406
diff
changeset
|
266 p = &temp->left; |
|
1026
38be15c1379a
fix duplicate rbtree keys case
Igor Sysoev <igor@sysoev.ru>
parents:
1012
diff
changeset
|
267 |
|
38be15c1379a
fix duplicate rbtree keys case
Igor Sysoev <igor@sysoev.ru>
parents:
1012
diff
changeset
|
268 } else if (node->key > temp->key) { |
|
38be15c1379a
fix duplicate rbtree keys case
Igor Sysoev <igor@sysoev.ru>
parents:
1012
diff
changeset
|
269 |
|
1743
4fc402c3ec73
optimize rbtree initialization and insert
Igor Sysoev <igor@sysoev.ru>
parents:
1406
diff
changeset
|
270 p = &temp->right; |
|
1026
38be15c1379a
fix duplicate rbtree keys case
Igor Sysoev <igor@sysoev.ru>
parents:
1012
diff
changeset
|
271 |
|
38be15c1379a
fix duplicate rbtree keys case
Igor Sysoev <igor@sysoev.ru>
parents:
1012
diff
changeset
|
272 } else { /* node->key == temp->key */ |
|
38be15c1379a
fix duplicate rbtree keys case
Igor Sysoev <igor@sysoev.ru>
parents:
1012
diff
changeset
|
273 |
|
38be15c1379a
fix duplicate rbtree keys case
Igor Sysoev <igor@sysoev.ru>
parents:
1012
diff
changeset
|
274 lzn = (ngx_http_limit_zone_node_t *) &node->color; |
|
38be15c1379a
fix duplicate rbtree keys case
Igor Sysoev <igor@sysoev.ru>
parents:
1012
diff
changeset
|
275 lznt = (ngx_http_limit_zone_node_t *) &temp->color; |
|
38be15c1379a
fix duplicate rbtree keys case
Igor Sysoev <igor@sysoev.ru>
parents:
1012
diff
changeset
|
276 |
|
1743
4fc402c3ec73
optimize rbtree initialization and insert
Igor Sysoev <igor@sysoev.ru>
parents:
1406
diff
changeset
|
277 p = (ngx_memn2cmp(lzn->data, lznt->data, lzn->len, lznt->len) < 0) |
|
4fc402c3ec73
optimize rbtree initialization and insert
Igor Sysoev <igor@sysoev.ru>
parents:
1406
diff
changeset
|
278 ? &temp->left : &temp->right; |
|
4fc402c3ec73
optimize rbtree initialization and insert
Igor Sysoev <igor@sysoev.ru>
parents:
1406
diff
changeset
|
279 } |
|
1026
38be15c1379a
fix duplicate rbtree keys case
Igor Sysoev <igor@sysoev.ru>
parents:
1012
diff
changeset
|
280 |
|
1743
4fc402c3ec73
optimize rbtree initialization and insert
Igor Sysoev <igor@sysoev.ru>
parents:
1406
diff
changeset
|
281 if (*p == sentinel) { |
|
4fc402c3ec73
optimize rbtree initialization and insert
Igor Sysoev <igor@sysoev.ru>
parents:
1406
diff
changeset
|
282 break; |
|
4fc402c3ec73
optimize rbtree initialization and insert
Igor Sysoev <igor@sysoev.ru>
parents:
1406
diff
changeset
|
283 } |
|
1026
38be15c1379a
fix duplicate rbtree keys case
Igor Sysoev <igor@sysoev.ru>
parents:
1012
diff
changeset
|
284 |
|
1743
4fc402c3ec73
optimize rbtree initialization and insert
Igor Sysoev <igor@sysoev.ru>
parents:
1406
diff
changeset
|
285 temp = *p; |
|
1026
38be15c1379a
fix duplicate rbtree keys case
Igor Sysoev <igor@sysoev.ru>
parents:
1012
diff
changeset
|
286 } |
|
38be15c1379a
fix duplicate rbtree keys case
Igor Sysoev <igor@sysoev.ru>
parents:
1012
diff
changeset
|
287 |
|
1743
4fc402c3ec73
optimize rbtree initialization and insert
Igor Sysoev <igor@sysoev.ru>
parents:
1406
diff
changeset
|
288 *p = node; |
|
1026
38be15c1379a
fix duplicate rbtree keys case
Igor Sysoev <igor@sysoev.ru>
parents:
1012
diff
changeset
|
289 node->parent = temp; |
|
38be15c1379a
fix duplicate rbtree keys case
Igor Sysoev <igor@sysoev.ru>
parents:
1012
diff
changeset
|
290 node->left = sentinel; |
|
38be15c1379a
fix duplicate rbtree keys case
Igor Sysoev <igor@sysoev.ru>
parents:
1012
diff
changeset
|
291 node->right = sentinel; |
|
38be15c1379a
fix duplicate rbtree keys case
Igor Sysoev <igor@sysoev.ru>
parents:
1012
diff
changeset
|
292 ngx_rbt_red(node); |
|
38be15c1379a
fix duplicate rbtree keys case
Igor Sysoev <igor@sysoev.ru>
parents:
1012
diff
changeset
|
293 } |
|
38be15c1379a
fix duplicate rbtree keys case
Igor Sysoev <igor@sysoev.ru>
parents:
1012
diff
changeset
|
294 |
|
38be15c1379a
fix duplicate rbtree keys case
Igor Sysoev <igor@sysoev.ru>
parents:
1012
diff
changeset
|
295 |
|
38be15c1379a
fix duplicate rbtree keys case
Igor Sysoev <igor@sysoev.ru>
parents:
1012
diff
changeset
|
296 static void |
| 980 | 297 ngx_http_limit_zone_cleanup(void *data) |
| 298 { | |
| 299 ngx_http_limit_zone_cleanup_t *lzcln = data; | |
| 300 | |
| 301 ngx_slab_pool_t *shpool; | |
| 302 ngx_rbtree_node_t *node; | |
| 987 | 303 ngx_http_limit_zone_ctx_t *ctx; |
| 980 | 304 ngx_http_limit_zone_node_t *lz; |
| 305 | |
| 987 | 306 ctx = lzcln->shm_zone->data; |
| 980 | 307 shpool = (ngx_slab_pool_t *) lzcln->shm_zone->shm.addr; |
| 308 node = lzcln->node; | |
| 981 | 309 lz = (ngx_http_limit_zone_node_t *) &node->color; |
| 980 | 310 |
| 311 ngx_shmtx_lock(&shpool->mutex); | |
| 312 | |
| 313 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, lzcln->shm_zone->shm.log, 0, | |
| 314 "limit zone cleanup: %08XD %d", node->key, lz->conn); | |
| 315 | |
| 316 lz->conn--; | |
| 317 | |
| 318 if (lz->conn == 0) { | |
| 987 | 319 ngx_rbtree_delete(ctx->rbtree, node); |
| 980 | 320 ngx_slab_free_locked(shpool, node); |
| 321 } | |
| 322 | |
| 323 ngx_shmtx_unlock(&shpool->mutex); | |
| 324 } | |
| 325 | |
| 326 | |
| 327 static ngx_int_t | |
|
993
1b9a4d92173f
pass the inherited shm_zone data
Igor Sysoev <igor@sysoev.ru>
parents:
987
diff
changeset
|
328 ngx_http_limit_zone_init_zone(ngx_shm_zone_t *shm_zone, void *data) |
| 980 | 329 { |
|
993
1b9a4d92173f
pass the inherited shm_zone data
Igor Sysoev <igor@sysoev.ru>
parents:
987
diff
changeset
|
330 ngx_http_limit_zone_ctx_t *octx = data; |
|
1b9a4d92173f
pass the inherited shm_zone data
Igor Sysoev <igor@sysoev.ru>
parents:
987
diff
changeset
|
331 |
|
2611
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2373
diff
changeset
|
332 size_t len; |
| 987 | 333 ngx_slab_pool_t *shpool; |
| 334 ngx_rbtree_node_t *sentinel; | |
| 335 ngx_http_limit_zone_ctx_t *ctx; | |
| 980 | 336 |
|
993
1b9a4d92173f
pass the inherited shm_zone data
Igor Sysoev <igor@sysoev.ru>
parents:
987
diff
changeset
|
337 ctx = shm_zone->data; |
|
1b9a4d92173f
pass the inherited shm_zone data
Igor Sysoev <igor@sysoev.ru>
parents:
987
diff
changeset
|
338 |
|
1b9a4d92173f
pass the inherited shm_zone data
Igor Sysoev <igor@sysoev.ru>
parents:
987
diff
changeset
|
339 if (octx) { |
|
1b9a4d92173f
pass the inherited shm_zone data
Igor Sysoev <igor@sysoev.ru>
parents:
987
diff
changeset
|
340 if (ngx_strcmp(ctx->var.data, octx->var.data) != 0) { |
|
1b9a4d92173f
pass the inherited shm_zone data
Igor Sysoev <igor@sysoev.ru>
parents:
987
diff
changeset
|
341 ngx_log_error(NGX_LOG_EMERG, shm_zone->shm.log, 0, |
| 1001 | 342 "limit_zone \"%V\" uses the \"%V\" variable " |
|
993
1b9a4d92173f
pass the inherited shm_zone data
Igor Sysoev <igor@sysoev.ru>
parents:
987
diff
changeset
|
343 "while previously it used the \"%V\" variable", |
|
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
|
344 &shm_zone->shm.name, &ctx->var, &octx->var); |
|
993
1b9a4d92173f
pass the inherited shm_zone data
Igor Sysoev <igor@sysoev.ru>
parents:
987
diff
changeset
|
345 return NGX_ERROR; |
|
1b9a4d92173f
pass the inherited shm_zone data
Igor Sysoev <igor@sysoev.ru>
parents:
987
diff
changeset
|
346 } |
|
1b9a4d92173f
pass the inherited shm_zone data
Igor Sysoev <igor@sysoev.ru>
parents:
987
diff
changeset
|
347 |
|
1b9a4d92173f
pass the inherited shm_zone data
Igor Sysoev <igor@sysoev.ru>
parents:
987
diff
changeset
|
348 ctx->rbtree = octx->rbtree; |
|
1b9a4d92173f
pass the inherited shm_zone data
Igor Sysoev <igor@sysoev.ru>
parents:
987
diff
changeset
|
349 |
|
1b9a4d92173f
pass the inherited shm_zone data
Igor Sysoev <igor@sysoev.ru>
parents:
987
diff
changeset
|
350 return NGX_OK; |
|
1b9a4d92173f
pass the inherited shm_zone data
Igor Sysoev <igor@sysoev.ru>
parents:
987
diff
changeset
|
351 } |
|
1b9a4d92173f
pass the inherited shm_zone data
Igor Sysoev <igor@sysoev.ru>
parents:
987
diff
changeset
|
352 |
| 980 | 353 shpool = (ngx_slab_pool_t *) shm_zone->shm.addr; |
| 354 | |
|
2720
b3b8c66bd520
support attaching to an existent Win32 shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
2716
diff
changeset
|
355 if (shm_zone->shm.exists) { |
|
b3b8c66bd520
support attaching to an existent Win32 shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
2716
diff
changeset
|
356 ctx->rbtree = shpool->data; |
|
b3b8c66bd520
support attaching to an existent Win32 shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
2716
diff
changeset
|
357 |
|
b3b8c66bd520
support attaching to an existent Win32 shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
2716
diff
changeset
|
358 return NGX_OK; |
|
b3b8c66bd520
support attaching to an existent Win32 shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
2716
diff
changeset
|
359 } |
|
b3b8c66bd520
support attaching to an existent Win32 shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
2716
diff
changeset
|
360 |
| 987 | 361 ctx->rbtree = ngx_slab_alloc(shpool, sizeof(ngx_rbtree_t)); |
| 362 if (ctx->rbtree == NULL) { | |
| 980 | 363 return NGX_ERROR; |
| 364 } | |
| 365 | |
|
2720
b3b8c66bd520
support attaching to an existent Win32 shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
2716
diff
changeset
|
366 shpool->data = ctx->rbtree; |
|
b3b8c66bd520
support attaching to an existent Win32 shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
2716
diff
changeset
|
367 |
| 980 | 368 sentinel = ngx_slab_alloc(shpool, sizeof(ngx_rbtree_node_t)); |
| 369 if (sentinel == NULL) { | |
| 370 return NGX_ERROR; | |
| 371 } | |
| 372 | |
|
1743
4fc402c3ec73
optimize rbtree initialization and insert
Igor Sysoev <igor@sysoev.ru>
parents:
1406
diff
changeset
|
373 ngx_rbtree_init(ctx->rbtree, sentinel, |
|
4fc402c3ec73
optimize rbtree initialization and insert
Igor Sysoev <igor@sysoev.ru>
parents:
1406
diff
changeset
|
374 ngx_http_limit_zone_rbtree_insert_value); |
| 980 | 375 |
|
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
|
376 len = sizeof(" in limit_zone \"\"") + shm_zone->shm.name.len; |
|
2611
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2373
diff
changeset
|
377 |
|
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2373
diff
changeset
|
378 shpool->log_ctx = ngx_slab_alloc(shpool, len); |
|
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2373
diff
changeset
|
379 if (shpool->log_ctx == NULL) { |
|
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2373
diff
changeset
|
380 return NGX_ERROR; |
|
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2373
diff
changeset
|
381 } |
|
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2373
diff
changeset
|
382 |
|
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
|
383 ngx_sprintf(shpool->log_ctx, " in limit_zone \"%V\"%Z", |
|
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
|
384 &shm_zone->shm.name); |
|
2611
2bce3f6416c6
improve ngx_slab_alloc() error logging
Igor Sysoev <igor@sysoev.ru>
parents:
2373
diff
changeset
|
385 |
| 980 | 386 return NGX_OK; |
| 387 } | |
| 388 | |
| 389 | |
| 390 static void * | |
| 391 ngx_http_limit_zone_create_conf(ngx_conf_t *cf) | |
| 392 { | |
| 393 ngx_http_limit_zone_conf_t *conf; | |
| 394 | |
| 395 conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_limit_zone_conf_t)); | |
| 396 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
|
397 return NULL; |
| 980 | 398 } |
| 399 | |
| 400 /* | |
| 401 * set by ngx_pcalloc(): | |
| 402 * | |
| 403 * conf->shm_zone = NULL; | |
| 404 * conf->conn = 0; | |
| 405 */ | |
| 406 | |
| 3186 | 407 conf->log_level = NGX_CONF_UNSET_UINT; |
| 408 | |
| 980 | 409 return conf; |
| 410 } | |
| 411 | |
| 412 | |
| 413 static char * | |
| 414 ngx_http_limit_zone_merge_conf(ngx_conf_t *cf, void *parent, void *child) | |
| 415 { | |
| 416 ngx_http_limit_zone_conf_t *prev = parent; | |
| 417 ngx_http_limit_zone_conf_t *conf = child; | |
| 418 | |
| 419 if (conf->shm_zone == NULL) { | |
| 4440 | 420 conf->shm_zone = prev->shm_zone; |
| 421 conf->conn = prev->conn; | |
| 980 | 422 } |
| 423 | |
| 3186 | 424 ngx_conf_merge_uint_value(conf->log_level, prev->log_level, NGX_LOG_ERR); |
| 425 | |
| 980 | 426 return NGX_CONF_OK; |
| 427 } | |
| 428 | |
| 429 | |
| 430 static char * | |
| 431 ngx_http_limit_zone(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) | |
| 432 { | |
| 987 | 433 ssize_t n; |
| 434 ngx_str_t *value; | |
| 435 ngx_shm_zone_t *shm_zone; | |
| 436 ngx_http_limit_zone_ctx_t *ctx; | |
| 980 | 437 |
| 438 value = cf->args->elts; | |
| 439 | |
| 987 | 440 if (value[2].data[0] != '$') { |
| 441 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, | |
| 442 "invalid variable name \"%V\"", &value[2]); | |
| 443 return NGX_CONF_ERROR; | |
| 444 } | |
| 445 | |
| 446 value[2].len--; | |
| 447 value[2].data++; | |
| 448 | |
| 449 ctx = ngx_pcalloc(cf->pool, sizeof(ngx_http_limit_zone_ctx_t)); | |
| 450 if (ctx == NULL) { | |
| 451 return NGX_CONF_ERROR; | |
| 452 } | |
| 453 | |
| 454 ctx->index = ngx_http_get_variable_index(cf, &value[2]); | |
| 455 if (ctx->index == NGX_ERROR) { | |
| 456 return NGX_CONF_ERROR; | |
| 457 } | |
| 458 | |
| 459 ctx->var = value[2]; | |
| 460 | |
| 461 n = ngx_parse_size(&value[3]); | |
| 980 | 462 |
| 463 if (n == NGX_ERROR) { | |
| 464 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, | |
| 987 | 465 "invalid size of limit_zone \"%V\"", &value[3]); |
| 980 | 466 return NGX_CONF_ERROR; |
| 467 } | |
| 468 | |
| 469 if (n < (ngx_int_t) (8 * ngx_pagesize)) { | |
| 470 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, | |
| 471 "limit_zone \"%V\" is too small", &value[1]); | |
| 472 return NGX_CONF_ERROR; | |
| 473 } | |
| 474 | |
| 475 | |
| 476 shm_zone = ngx_shared_memory_add(cf, &value[1], n, | |
| 477 &ngx_http_limit_zone_module); | |
| 478 if (shm_zone == NULL) { | |
| 479 return NGX_CONF_ERROR; | |
| 480 } | |
| 481 | |
| 987 | 482 if (shm_zone->data) { |
| 483 ctx = shm_zone->data; | |
| 484 | |
| 485 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, | |
| 486 "limit_zone \"%V\" is already bound to variable \"%V\"", | |
| 487 &value[1], &ctx->var); | |
| 488 return NGX_CONF_ERROR; | |
| 489 } | |
| 490 | |
| 980 | 491 shm_zone->init = ngx_http_limit_zone_init_zone; |
| 987 | 492 shm_zone->data = ctx; |
| 980 | 493 |
| 494 return NGX_CONF_OK; | |
| 495 } | |
| 496 | |
| 497 | |
| 498 static char * | |
| 499 ngx_http_limit_conn(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) | |
| 500 { | |
| 501 ngx_http_limit_zone_conf_t *lzcf = conf; | |
| 502 | |
| 503 ngx_int_t n; | |
| 504 ngx_str_t *value; | |
| 505 | |
| 2372 | 506 if (lzcf->shm_zone) { |
| 507 return "is duplicate"; | |
| 508 } | |
| 509 | |
| 980 | 510 value = cf->args->elts; |
| 511 | |
| 987 | 512 lzcf->shm_zone = ngx_shared_memory_add(cf, &value[1], 0, |
| 513 &ngx_http_limit_zone_module); | |
| 514 if (lzcf->shm_zone == NULL) { | |
| 980 | 515 return NGX_CONF_ERROR; |
| 516 } | |
| 517 | |
| 987 | 518 n = ngx_atoi(value[2].data, value[2].len); |
| 519 if (n <= 0) { | |
| 980 | 520 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
| 987 | 521 "invalid number of connections \"%V\"", &value[2]); |
| 980 | 522 return NGX_CONF_ERROR; |
| 523 } | |
| 524 | |
|
1011
19118c44303f
test length of variable and number of connections
Igor Sysoev <igor@sysoev.ru>
parents:
1002
diff
changeset
|
525 if (n > 65535) { |
|
19118c44303f
test length of variable and number of connections
Igor Sysoev <igor@sysoev.ru>
parents:
1002
diff
changeset
|
526 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
|
19118c44303f
test length of variable and number of connections
Igor Sysoev <igor@sysoev.ru>
parents:
1002
diff
changeset
|
527 "connection limit must be less 65536"); |
|
19118c44303f
test length of variable and number of connections
Igor Sysoev <igor@sysoev.ru>
parents:
1002
diff
changeset
|
528 return NGX_CONF_ERROR; |
|
19118c44303f
test length of variable and number of connections
Igor Sysoev <igor@sysoev.ru>
parents:
1002
diff
changeset
|
529 } |
|
19118c44303f
test length of variable and number of connections
Igor Sysoev <igor@sysoev.ru>
parents:
1002
diff
changeset
|
530 |
| 980 | 531 lzcf->conn = n; |
| 532 | |
| 533 return NGX_CONF_OK; | |
| 534 } | |
| 535 | |
| 536 | |
| 537 static ngx_int_t | |
| 538 ngx_http_limit_zone_init(ngx_conf_t *cf) | |
| 539 { | |
| 540 ngx_http_handler_pt *h; | |
| 541 ngx_http_core_main_conf_t *cmcf; | |
| 542 | |
| 543 cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module); | |
| 544 | |
| 545 h = ngx_array_push(&cmcf->phases[NGX_HTTP_PREACCESS_PHASE].handlers); | |
| 546 if (h == NULL) { | |
| 547 return NGX_ERROR; | |
| 548 } | |
| 549 | |
| 550 *h = ngx_http_limit_zone_handler; | |
| 551 | |
| 552 return NGX_OK; | |
| 553 } |