Mercurial > hg > nginx
annotate src/stream/ngx_stream_upstream_zone_module.c @ 6174:68c106e6fa0a
Stream: added postconfiguration method to stream modules.
| author | Vladimir Homutov <vl@nginx.com> |
|---|---|
| date | Tue, 09 Jun 2015 13:00:45 +0300 |
| parents | caa103acf180 |
| children | 311d232ad803 |
| 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); | |
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17 static ngx_int_t ngx_stream_upstream_zone_copy_peers(ngx_slab_pool_t *shpool, |
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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"), | |
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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 = { | |
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Stream: added postconfiguration method to stream modules.
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35 NULL, /* postconfiguration */ |
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Stream: added postconfiguration method to stream modules.
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36 |
| 6115 | 37 NULL, /* create main configuration */ |
| 38 NULL, /* init main configuration */ | |
| 39 | |
| 40 NULL, /* create server configuration */ | |
| 41 NULL, /* merge server configuration */ | |
| 42 }; | |
| 43 | |
| 44 | |
| 45 ngx_module_t ngx_stream_upstream_zone_module = { | |
| 46 NGX_MODULE_V1, | |
| 47 &ngx_stream_upstream_zone_module_ctx, /* module context */ | |
| 48 ngx_stream_upstream_zone_commands, /* module directives */ | |
| 49 NGX_STREAM_MODULE, /* module type */ | |
| 50 NULL, /* init master */ | |
| 51 NULL, /* init module */ | |
| 52 NULL, /* init process */ | |
| 53 NULL, /* init thread */ | |
| 54 NULL, /* exit thread */ | |
| 55 NULL, /* exit process */ | |
| 56 NULL, /* exit master */ | |
| 57 NGX_MODULE_V1_PADDING | |
| 58 }; | |
| 59 | |
| 60 | |
| 61 static char * | |
| 62 ngx_stream_upstream_zone(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) | |
| 63 { | |
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64 ssize_t size; |
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65 ngx_str_t *value; |
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66 ngx_stream_upstream_srv_conf_t *uscf; |
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67 ngx_stream_upstream_main_conf_t *umcf; |
| 6115 | 68 |
| 69 uscf = ngx_stream_conf_get_module_srv_conf(cf, ngx_stream_upstream_module); | |
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70 umcf = ngx_stream_conf_get_module_main_conf(cf, ngx_stream_upstream_module); |
| 6115 | 71 |
| 72 value = cf->args->elts; | |
| 73 | |
| 74 if (!value[1].len) { | |
| 75 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, | |
| 76 "invalid zone name \"%V\"", &value[1]); | |
| 77 return NGX_CONF_ERROR; | |
| 78 } | |
| 79 | |
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80 if (cf->args->nelts == 3) { |
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81 size = ngx_parse_size(&value[2]); |
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82 |
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83 if (size == NGX_ERROR) { |
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84 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
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85 "invalid zone size \"%V\"", &value[2]); |
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86 return NGX_CONF_ERROR; |
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87 } |
| 6115 | 88 |
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89 if (size < (ssize_t) (8 * ngx_pagesize)) { |
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90 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
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91 "zone \"%V\" is too small", &value[1]); |
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92 return NGX_CONF_ERROR; |
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93 } |
| 6115 | 94 |
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95 } else { |
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parents:
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96 size = 0; |
| 6115 | 97 } |
| 98 | |
| 99 uscf->shm_zone = ngx_shared_memory_add(cf, &value[1], size, | |
| 100 &ngx_stream_upstream_module); | |
| 101 if (uscf->shm_zone == NULL) { | |
| 102 return NGX_CONF_ERROR; | |
| 103 } | |
| 104 | |
| 105 uscf->shm_zone->init = ngx_stream_upstream_init_zone; | |
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106 uscf->shm_zone->data = umcf; |
| 6115 | 107 |
| 108 uscf->shm_zone->noreuse = 1; | |
| 109 | |
| 110 return NGX_CONF_OK; | |
| 111 } | |
| 112 | |
| 113 | |
| 114 static ngx_int_t | |
| 115 ngx_stream_upstream_init_zone(ngx_shm_zone_t *shm_zone, void *data) | |
| 116 { | |
| 117 size_t len; | |
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118 ngx_uint_t i; |
| 6115 | 119 ngx_slab_pool_t *shpool; |
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120 ngx_stream_upstream_srv_conf_t *uscf, **uscfp; |
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121 ngx_stream_upstream_main_conf_t *umcf; |
| 6115 | 122 |
| 123 shpool = (ngx_slab_pool_t *) shm_zone->shm.addr; | |
| 124 | |
| 125 if (shm_zone->shm.exists) { | |
| 126 return NGX_ERROR; | |
| 127 } | |
| 128 | |
| 129 len = sizeof(" in upstream zone \"\"") + shm_zone->shm.name.len; | |
| 130 | |
| 131 shpool->log_ctx = ngx_slab_alloc(shpool, len); | |
| 132 if (shpool->log_ctx == NULL) { | |
| 133 return NGX_ERROR; | |
| 134 } | |
| 135 | |
| 136 ngx_sprintf(shpool->log_ctx, " in upstream zone \"%V\"%Z", | |
| 137 &shm_zone->shm.name); | |
| 138 | |
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139 |
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140 /* copy peers to shared memory */ |
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141 |
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142 umcf = shm_zone->data; |
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143 uscfp = umcf->upstreams.elts; |
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144 |
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145 for (i = 0; i < umcf->upstreams.nelts; i++) { |
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146 uscf = uscfp[i]; |
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147 |
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148 if (uscf->shm_zone != shm_zone) { |
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149 continue; |
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150 } |
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151 |
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152 if (ngx_stream_upstream_zone_copy_peers(shpool, uscf) != NGX_OK) { |
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153 return NGX_ERROR; |
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154 } |
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155 } |
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156 |
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157 return NGX_OK; |
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158 } |
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159 |
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160 |
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161 static ngx_int_t |
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162 ngx_stream_upstream_zone_copy_peers(ngx_slab_pool_t *shpool, |
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163 ngx_stream_upstream_srv_conf_t *uscf) |
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164 { |
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165 ngx_stream_upstream_rr_peer_t *peer, **peerp; |
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166 ngx_stream_upstream_rr_peers_t *peers, *backup; |
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167 |
| 6115 | 168 peers = ngx_slab_alloc(shpool, sizeof(ngx_stream_upstream_rr_peers_t)); |
| 169 if (peers == NULL) { | |
| 170 return NGX_ERROR; | |
| 171 } | |
| 172 | |
| 173 ngx_memcpy(peers, uscf->peer.data, sizeof(ngx_stream_upstream_rr_peers_t)); | |
| 174 | |
| 175 peers->shpool = shpool; | |
| 176 | |
| 177 for (peerp = &peers->peer; *peerp; peerp = &peer->next) { | |
| 178 /* pool is unlocked */ | |
| 179 peer = ngx_slab_calloc_locked(shpool, | |
| 180 sizeof(ngx_stream_upstream_rr_peer_t)); | |
| 181 if (peer == NULL) { | |
| 182 return NGX_ERROR; | |
| 183 } | |
| 184 | |
| 185 ngx_memcpy(peer, *peerp, sizeof(ngx_stream_upstream_rr_peer_t)); | |
| 186 | |
| 187 *peerp = peer; | |
| 188 } | |
| 189 | |
| 190 if (peers->next == NULL) { | |
| 191 goto done; | |
| 192 } | |
| 193 | |
| 194 backup = ngx_slab_alloc(shpool, sizeof(ngx_stream_upstream_rr_peers_t)); | |
| 195 if (backup == NULL) { | |
| 196 return NGX_ERROR; | |
| 197 } | |
| 198 | |
| 199 ngx_memcpy(backup, peers->next, sizeof(ngx_stream_upstream_rr_peers_t)); | |
| 200 | |
| 201 backup->shpool = shpool; | |
| 202 | |
| 203 for (peerp = &backup->peer; *peerp; peerp = &peer->next) { | |
| 204 /* pool is unlocked */ | |
| 205 peer = ngx_slab_calloc_locked(shpool, | |
| 206 sizeof(ngx_stream_upstream_rr_peer_t)); | |
| 207 if (peer == NULL) { | |
| 208 return NGX_ERROR; | |
| 209 } | |
| 210 | |
| 211 ngx_memcpy(peer, *peerp, sizeof(ngx_stream_upstream_rr_peer_t)); | |
| 212 | |
| 213 *peerp = peer; | |
| 214 } | |
| 215 | |
| 216 peers->next = backup; | |
| 217 | |
| 218 done: | |
| 219 | |
| 220 uscf->peer.data = peers; | |
| 221 | |
| 222 return NGX_OK; | |
| 223 } |