Mercurial > hg > nginx
annotate src/stream/ngx_stream_upstream_zone_module.c @ 6123:caa103acf180
Upstream: allow multiple upstreams to use the same shared zone.
| author | Ruslan Ermilov <ru@nginx.com> |
|---|---|
| date | Wed, 22 Apr 2015 18:37:34 +0300 |
| parents | 61d7ae76647d |
| children | 68c106e6fa0a |
| rev | line source |
|---|---|
| 6115 | 1 |
| 2 /* | |
| 3 * Copyright (C) Ruslan Ermilov | |
| 4 * Copyright (C) Nginx, Inc. | |
| 5 */ | |
| 6 | |
| 7 | |
| 8 #include <ngx_config.h> | |
| 9 #include <ngx_core.h> | |
| 10 #include <ngx_stream.h> | |
| 11 | |
| 12 | |
| 13 static char *ngx_stream_upstream_zone(ngx_conf_t *cf, ngx_command_t *cmd, | |
| 14 void *conf); | |
| 15 static ngx_int_t ngx_stream_upstream_init_zone(ngx_shm_zone_t *shm_zone, | |
| 16 void *data); | |
|
6123
caa103acf180
Upstream: allow multiple upstreams to use the same shared zone.
Ruslan Ermilov <ru@nginx.com>
parents:
6115
diff
changeset
|
17 static ngx_int_t ngx_stream_upstream_zone_copy_peers(ngx_slab_pool_t *shpool, |
|
caa103acf180
Upstream: allow multiple upstreams to use the same shared zone.
Ruslan Ermilov <ru@nginx.com>
parents:
6115
diff
changeset
|
18 ngx_stream_upstream_srv_conf_t *uscf); |
| 6115 | 19 |
| 20 | |
| 21 static ngx_command_t ngx_stream_upstream_zone_commands[] = { | |
| 22 | |
| 23 { ngx_string("zone"), | |
|
6123
caa103acf180
Upstream: allow multiple upstreams to use the same shared zone.
Ruslan Ermilov <ru@nginx.com>
parents:
6115
diff
changeset
|
24 NGX_STREAM_UPS_CONF|NGX_CONF_TAKE12, |
| 6115 | 25 ngx_stream_upstream_zone, |
| 26 0, | |
| 27 0, | |
| 28 NULL }, | |
| 29 | |
| 30 ngx_null_command | |
| 31 }; | |
| 32 | |
| 33 | |
| 34 static ngx_stream_module_t ngx_stream_upstream_zone_module_ctx = { | |
| 35 NULL, /* create main configuration */ | |
| 36 NULL, /* init main configuration */ | |
| 37 | |
| 38 NULL, /* create server configuration */ | |
| 39 NULL, /* merge server configuration */ | |
| 40 }; | |
| 41 | |
| 42 | |
| 43 ngx_module_t ngx_stream_upstream_zone_module = { | |
| 44 NGX_MODULE_V1, | |
| 45 &ngx_stream_upstream_zone_module_ctx, /* module context */ | |
| 46 ngx_stream_upstream_zone_commands, /* module directives */ | |
| 47 NGX_STREAM_MODULE, /* module type */ | |
| 48 NULL, /* init master */ | |
| 49 NULL, /* init module */ | |
| 50 NULL, /* init process */ | |
| 51 NULL, /* init thread */ | |
| 52 NULL, /* exit thread */ | |
| 53 NULL, /* exit process */ | |
| 54 NULL, /* exit master */ | |
| 55 NGX_MODULE_V1_PADDING | |
| 56 }; | |
| 57 | |
| 58 | |
| 59 static char * | |
| 60 ngx_stream_upstream_zone(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) | |
| 61 { | |
|
6123
caa103acf180
Upstream: allow multiple upstreams to use the same shared zone.
Ruslan Ermilov <ru@nginx.com>
parents:
6115
diff
changeset
|
62 ssize_t size; |
|
caa103acf180
Upstream: allow multiple upstreams to use the same shared zone.
Ruslan Ermilov <ru@nginx.com>
parents:
6115
diff
changeset
|
63 ngx_str_t *value; |
|
caa103acf180
Upstream: allow multiple upstreams to use the same shared zone.
Ruslan Ermilov <ru@nginx.com>
parents:
6115
diff
changeset
|
64 ngx_stream_upstream_srv_conf_t *uscf; |
|
caa103acf180
Upstream: allow multiple upstreams to use the same shared zone.
Ruslan Ermilov <ru@nginx.com>
parents:
6115
diff
changeset
|
65 ngx_stream_upstream_main_conf_t *umcf; |
| 6115 | 66 |
| 67 uscf = ngx_stream_conf_get_module_srv_conf(cf, ngx_stream_upstream_module); | |
|
6123
caa103acf180
Upstream: allow multiple upstreams to use the same shared zone.
Ruslan Ermilov <ru@nginx.com>
parents:
6115
diff
changeset
|
68 umcf = ngx_stream_conf_get_module_main_conf(cf, ngx_stream_upstream_module); |
| 6115 | 69 |
| 70 value = cf->args->elts; | |
| 71 | |
| 72 if (!value[1].len) { | |
| 73 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, | |
| 74 "invalid zone name \"%V\"", &value[1]); | |
| 75 return NGX_CONF_ERROR; | |
| 76 } | |
| 77 | |
|
6123
caa103acf180
Upstream: allow multiple upstreams to use the same shared zone.
Ruslan Ermilov <ru@nginx.com>
parents:
6115
diff
changeset
|
78 if (cf->args->nelts == 3) { |
|
caa103acf180
Upstream: allow multiple upstreams to use the same shared zone.
Ruslan Ermilov <ru@nginx.com>
parents:
6115
diff
changeset
|
79 size = ngx_parse_size(&value[2]); |
|
caa103acf180
Upstream: allow multiple upstreams to use the same shared zone.
Ruslan Ermilov <ru@nginx.com>
parents:
6115
diff
changeset
|
80 |
|
caa103acf180
Upstream: allow multiple upstreams to use the same shared zone.
Ruslan Ermilov <ru@nginx.com>
parents:
6115
diff
changeset
|
81 if (size == NGX_ERROR) { |
|
caa103acf180
Upstream: allow multiple upstreams to use the same shared zone.
Ruslan Ermilov <ru@nginx.com>
parents:
6115
diff
changeset
|
82 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
|
caa103acf180
Upstream: allow multiple upstreams to use the same shared zone.
Ruslan Ermilov <ru@nginx.com>
parents:
6115
diff
changeset
|
83 "invalid zone size \"%V\"", &value[2]); |
|
caa103acf180
Upstream: allow multiple upstreams to use the same shared zone.
Ruslan Ermilov <ru@nginx.com>
parents:
6115
diff
changeset
|
84 return NGX_CONF_ERROR; |
|
caa103acf180
Upstream: allow multiple upstreams to use the same shared zone.
Ruslan Ermilov <ru@nginx.com>
parents:
6115
diff
changeset
|
85 } |
| 6115 | 86 |
|
6123
caa103acf180
Upstream: allow multiple upstreams to use the same shared zone.
Ruslan Ermilov <ru@nginx.com>
parents:
6115
diff
changeset
|
87 if (size < (ssize_t) (8 * ngx_pagesize)) { |
|
caa103acf180
Upstream: allow multiple upstreams to use the same shared zone.
Ruslan Ermilov <ru@nginx.com>
parents:
6115
diff
changeset
|
88 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
|
caa103acf180
Upstream: allow multiple upstreams to use the same shared zone.
Ruslan Ermilov <ru@nginx.com>
parents:
6115
diff
changeset
|
89 "zone \"%V\" is too small", &value[1]); |
|
caa103acf180
Upstream: allow multiple upstreams to use the same shared zone.
Ruslan Ermilov <ru@nginx.com>
parents:
6115
diff
changeset
|
90 return NGX_CONF_ERROR; |
|
caa103acf180
Upstream: allow multiple upstreams to use the same shared zone.
Ruslan Ermilov <ru@nginx.com>
parents:
6115
diff
changeset
|
91 } |
| 6115 | 92 |
|
6123
caa103acf180
Upstream: allow multiple upstreams to use the same shared zone.
Ruslan Ermilov <ru@nginx.com>
parents:
6115
diff
changeset
|
93 } else { |
|
caa103acf180
Upstream: allow multiple upstreams to use the same shared zone.
Ruslan Ermilov <ru@nginx.com>
parents:
6115
diff
changeset
|
94 size = 0; |
| 6115 | 95 } |
| 96 | |
| 97 uscf->shm_zone = ngx_shared_memory_add(cf, &value[1], size, | |
| 98 &ngx_stream_upstream_module); | |
| 99 if (uscf->shm_zone == NULL) { | |
| 100 return NGX_CONF_ERROR; | |
| 101 } | |
| 102 | |
| 103 uscf->shm_zone->init = ngx_stream_upstream_init_zone; | |
|
6123
caa103acf180
Upstream: allow multiple upstreams to use the same shared zone.
Ruslan Ermilov <ru@nginx.com>
parents:
6115
diff
changeset
|
104 uscf->shm_zone->data = umcf; |
| 6115 | 105 |
| 106 uscf->shm_zone->noreuse = 1; | |
| 107 | |
| 108 return NGX_CONF_OK; | |
| 109 } | |
| 110 | |
| 111 | |
| 112 static ngx_int_t | |
| 113 ngx_stream_upstream_init_zone(ngx_shm_zone_t *shm_zone, void *data) | |
| 114 { | |
| 115 size_t len; | |
|
6123
caa103acf180
Upstream: allow multiple upstreams to use the same shared zone.
Ruslan Ermilov <ru@nginx.com>
parents:
6115
diff
changeset
|
116 ngx_uint_t i; |
| 6115 | 117 ngx_slab_pool_t *shpool; |
|
6123
caa103acf180
Upstream: allow multiple upstreams to use the same shared zone.
Ruslan Ermilov <ru@nginx.com>
parents:
6115
diff
changeset
|
118 ngx_stream_upstream_srv_conf_t *uscf, **uscfp; |
|
caa103acf180
Upstream: allow multiple upstreams to use the same shared zone.
Ruslan Ermilov <ru@nginx.com>
parents:
6115
diff
changeset
|
119 ngx_stream_upstream_main_conf_t *umcf; |
| 6115 | 120 |
| 121 shpool = (ngx_slab_pool_t *) shm_zone->shm.addr; | |
| 122 | |
| 123 if (shm_zone->shm.exists) { | |
| 124 return NGX_ERROR; | |
| 125 } | |
| 126 | |
| 127 len = sizeof(" in upstream zone \"\"") + shm_zone->shm.name.len; | |
| 128 | |
| 129 shpool->log_ctx = ngx_slab_alloc(shpool, len); | |
| 130 if (shpool->log_ctx == NULL) { | |
| 131 return NGX_ERROR; | |
| 132 } | |
| 133 | |
| 134 ngx_sprintf(shpool->log_ctx, " in upstream zone \"%V\"%Z", | |
| 135 &shm_zone->shm.name); | |
| 136 | |
|
6123
caa103acf180
Upstream: allow multiple upstreams to use the same shared zone.
Ruslan Ermilov <ru@nginx.com>
parents:
6115
diff
changeset
|
137 |
|
caa103acf180
Upstream: allow multiple upstreams to use the same shared zone.
Ruslan Ermilov <ru@nginx.com>
parents:
6115
diff
changeset
|
138 /* copy peers to shared memory */ |
|
caa103acf180
Upstream: allow multiple upstreams to use the same shared zone.
Ruslan Ermilov <ru@nginx.com>
parents:
6115
diff
changeset
|
139 |
|
caa103acf180
Upstream: allow multiple upstreams to use the same shared zone.
Ruslan Ermilov <ru@nginx.com>
parents:
6115
diff
changeset
|
140 umcf = shm_zone->data; |
|
caa103acf180
Upstream: allow multiple upstreams to use the same shared zone.
Ruslan Ermilov <ru@nginx.com>
parents:
6115
diff
changeset
|
141 uscfp = umcf->upstreams.elts; |
|
caa103acf180
Upstream: allow multiple upstreams to use the same shared zone.
Ruslan Ermilov <ru@nginx.com>
parents:
6115
diff
changeset
|
142 |
|
caa103acf180
Upstream: allow multiple upstreams to use the same shared zone.
Ruslan Ermilov <ru@nginx.com>
parents:
6115
diff
changeset
|
143 for (i = 0; i < umcf->upstreams.nelts; i++) { |
|
caa103acf180
Upstream: allow multiple upstreams to use the same shared zone.
Ruslan Ermilov <ru@nginx.com>
parents:
6115
diff
changeset
|
144 uscf = uscfp[i]; |
|
caa103acf180
Upstream: allow multiple upstreams to use the same shared zone.
Ruslan Ermilov <ru@nginx.com>
parents:
6115
diff
changeset
|
145 |
|
caa103acf180
Upstream: allow multiple upstreams to use the same shared zone.
Ruslan Ermilov <ru@nginx.com>
parents:
6115
diff
changeset
|
146 if (uscf->shm_zone != shm_zone) { |
|
caa103acf180
Upstream: allow multiple upstreams to use the same shared zone.
Ruslan Ermilov <ru@nginx.com>
parents:
6115
diff
changeset
|
147 continue; |
|
caa103acf180
Upstream: allow multiple upstreams to use the same shared zone.
Ruslan Ermilov <ru@nginx.com>
parents:
6115
diff
changeset
|
148 } |
|
caa103acf180
Upstream: allow multiple upstreams to use the same shared zone.
Ruslan Ermilov <ru@nginx.com>
parents:
6115
diff
changeset
|
149 |
|
caa103acf180
Upstream: allow multiple upstreams to use the same shared zone.
Ruslan Ermilov <ru@nginx.com>
parents:
6115
diff
changeset
|
150 if (ngx_stream_upstream_zone_copy_peers(shpool, uscf) != NGX_OK) { |
|
caa103acf180
Upstream: allow multiple upstreams to use the same shared zone.
Ruslan Ermilov <ru@nginx.com>
parents:
6115
diff
changeset
|
151 return NGX_ERROR; |
|
caa103acf180
Upstream: allow multiple upstreams to use the same shared zone.
Ruslan Ermilov <ru@nginx.com>
parents:
6115
diff
changeset
|
152 } |
|
caa103acf180
Upstream: allow multiple upstreams to use the same shared zone.
Ruslan Ermilov <ru@nginx.com>
parents:
6115
diff
changeset
|
153 } |
|
caa103acf180
Upstream: allow multiple upstreams to use the same shared zone.
Ruslan Ermilov <ru@nginx.com>
parents:
6115
diff
changeset
|
154 |
|
caa103acf180
Upstream: allow multiple upstreams to use the same shared zone.
Ruslan Ermilov <ru@nginx.com>
parents:
6115
diff
changeset
|
155 return NGX_OK; |
|
caa103acf180
Upstream: allow multiple upstreams to use the same shared zone.
Ruslan Ermilov <ru@nginx.com>
parents:
6115
diff
changeset
|
156 } |
|
caa103acf180
Upstream: allow multiple upstreams to use the same shared zone.
Ruslan Ermilov <ru@nginx.com>
parents:
6115
diff
changeset
|
157 |
|
caa103acf180
Upstream: allow multiple upstreams to use the same shared zone.
Ruslan Ermilov <ru@nginx.com>
parents:
6115
diff
changeset
|
158 |
|
caa103acf180
Upstream: allow multiple upstreams to use the same shared zone.
Ruslan Ermilov <ru@nginx.com>
parents:
6115
diff
changeset
|
159 static ngx_int_t |
|
caa103acf180
Upstream: allow multiple upstreams to use the same shared zone.
Ruslan Ermilov <ru@nginx.com>
parents:
6115
diff
changeset
|
160 ngx_stream_upstream_zone_copy_peers(ngx_slab_pool_t *shpool, |
|
caa103acf180
Upstream: allow multiple upstreams to use the same shared zone.
Ruslan Ermilov <ru@nginx.com>
parents:
6115
diff
changeset
|
161 ngx_stream_upstream_srv_conf_t *uscf) |
|
caa103acf180
Upstream: allow multiple upstreams to use the same shared zone.
Ruslan Ermilov <ru@nginx.com>
parents:
6115
diff
changeset
|
162 { |
|
caa103acf180
Upstream: allow multiple upstreams to use the same shared zone.
Ruslan Ermilov <ru@nginx.com>
parents:
6115
diff
changeset
|
163 ngx_stream_upstream_rr_peer_t *peer, **peerp; |
|
caa103acf180
Upstream: allow multiple upstreams to use the same shared zone.
Ruslan Ermilov <ru@nginx.com>
parents:
6115
diff
changeset
|
164 ngx_stream_upstream_rr_peers_t *peers, *backup; |
|
caa103acf180
Upstream: allow multiple upstreams to use the same shared zone.
Ruslan Ermilov <ru@nginx.com>
parents:
6115
diff
changeset
|
165 |
| 6115 | 166 peers = ngx_slab_alloc(shpool, sizeof(ngx_stream_upstream_rr_peers_t)); |
| 167 if (peers == NULL) { | |
| 168 return NGX_ERROR; | |
| 169 } | |
| 170 | |
| 171 ngx_memcpy(peers, uscf->peer.data, sizeof(ngx_stream_upstream_rr_peers_t)); | |
| 172 | |
| 173 peers->shpool = shpool; | |
| 174 | |
| 175 for (peerp = &peers->peer; *peerp; peerp = &peer->next) { | |
| 176 /* pool is unlocked */ | |
| 177 peer = ngx_slab_calloc_locked(shpool, | |
| 178 sizeof(ngx_stream_upstream_rr_peer_t)); | |
| 179 if (peer == NULL) { | |
| 180 return NGX_ERROR; | |
| 181 } | |
| 182 | |
| 183 ngx_memcpy(peer, *peerp, sizeof(ngx_stream_upstream_rr_peer_t)); | |
| 184 | |
| 185 *peerp = peer; | |
| 186 } | |
| 187 | |
| 188 if (peers->next == NULL) { | |
| 189 goto done; | |
| 190 } | |
| 191 | |
| 192 backup = ngx_slab_alloc(shpool, sizeof(ngx_stream_upstream_rr_peers_t)); | |
| 193 if (backup == NULL) { | |
| 194 return NGX_ERROR; | |
| 195 } | |
| 196 | |
| 197 ngx_memcpy(backup, peers->next, sizeof(ngx_stream_upstream_rr_peers_t)); | |
| 198 | |
| 199 backup->shpool = shpool; | |
| 200 | |
| 201 for (peerp = &backup->peer; *peerp; peerp = &peer->next) { | |
| 202 /* pool is unlocked */ | |
| 203 peer = ngx_slab_calloc_locked(shpool, | |
| 204 sizeof(ngx_stream_upstream_rr_peer_t)); | |
| 205 if (peer == NULL) { | |
| 206 return NGX_ERROR; | |
| 207 } | |
| 208 | |
| 209 ngx_memcpy(peer, *peerp, sizeof(ngx_stream_upstream_rr_peer_t)); | |
| 210 | |
| 211 *peerp = peer; | |
| 212 } | |
| 213 | |
| 214 peers->next = backup; | |
| 215 | |
| 216 done: | |
| 217 | |
| 218 uscf->peer.data = peers; | |
| 219 | |
| 220 return NGX_OK; | |
| 221 } |