Mercurial > hg > nginx-quic
comparison src/stream/ngx_stream_upstream_zone_module.c @ 6115:61d7ae76647d
Stream: port from NGINX+.
author | Ruslan Ermilov <ru@nginx.com> |
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date | Mon, 20 Apr 2015 13:05:11 +0300 |
parents | |
children | caa103acf180 |
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6114:4a640716f4e2 | 6115:61d7ae76647d |
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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); | |
17 | |
18 | |
19 static ngx_command_t ngx_stream_upstream_zone_commands[] = { | |
20 | |
21 { ngx_string("zone"), | |
22 NGX_STREAM_UPS_CONF|NGX_CONF_TAKE2, | |
23 ngx_stream_upstream_zone, | |
24 0, | |
25 0, | |
26 NULL }, | |
27 | |
28 ngx_null_command | |
29 }; | |
30 | |
31 | |
32 static ngx_stream_module_t ngx_stream_upstream_zone_module_ctx = { | |
33 NULL, /* create main configuration */ | |
34 NULL, /* init main configuration */ | |
35 | |
36 NULL, /* create server configuration */ | |
37 NULL, /* merge server configuration */ | |
38 }; | |
39 | |
40 | |
41 ngx_module_t ngx_stream_upstream_zone_module = { | |
42 NGX_MODULE_V1, | |
43 &ngx_stream_upstream_zone_module_ctx, /* module context */ | |
44 ngx_stream_upstream_zone_commands, /* module directives */ | |
45 NGX_STREAM_MODULE, /* module type */ | |
46 NULL, /* init master */ | |
47 NULL, /* init module */ | |
48 NULL, /* init process */ | |
49 NULL, /* init thread */ | |
50 NULL, /* exit thread */ | |
51 NULL, /* exit process */ | |
52 NULL, /* exit master */ | |
53 NGX_MODULE_V1_PADDING | |
54 }; | |
55 | |
56 | |
57 static char * | |
58 ngx_stream_upstream_zone(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) | |
59 { | |
60 ssize_t size; | |
61 ngx_str_t *value; | |
62 ngx_stream_upstream_srv_conf_t *uscf; | |
63 | |
64 uscf = ngx_stream_conf_get_module_srv_conf(cf, ngx_stream_upstream_module); | |
65 | |
66 value = cf->args->elts; | |
67 | |
68 if (!value[1].len) { | |
69 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, | |
70 "invalid zone name \"%V\"", &value[1]); | |
71 return NGX_CONF_ERROR; | |
72 } | |
73 | |
74 size = ngx_parse_size(&value[2]); | |
75 | |
76 if (size == NGX_ERROR) { | |
77 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, | |
78 "invalid zone size \"%V\"", &value[2]); | |
79 return NGX_CONF_ERROR; | |
80 } | |
81 | |
82 if (size < (ssize_t) (8 * ngx_pagesize)) { | |
83 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, | |
84 "zone \"%V\" is too small", &value[1]); | |
85 return NGX_CONF_ERROR; | |
86 } | |
87 | |
88 uscf->shm_zone = ngx_shared_memory_add(cf, &value[1], size, | |
89 &ngx_stream_upstream_module); | |
90 if (uscf->shm_zone == NULL) { | |
91 return NGX_CONF_ERROR; | |
92 } | |
93 | |
94 if (uscf->shm_zone->data) { | |
95 uscf = uscf->shm_zone->data; | |
96 | |
97 ngx_conf_log_error(NGX_LOG_WARN, cf, 0, | |
98 "upstream \"%V\" in %s:%ui " | |
99 "is already bound to zone \"%V\"", | |
100 &uscf->host, uscf->file_name, uscf->line, | |
101 &value[1]); | |
102 return NGX_CONF_ERROR; | |
103 } | |
104 | |
105 uscf->shm_zone->init = ngx_stream_upstream_init_zone; | |
106 uscf->shm_zone->data = uscf; | |
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 ngx_stream_upstream_srv_conf_t *ouscf = data; | |
118 | |
119 size_t len; | |
120 ngx_slab_pool_t *shpool; | |
121 ngx_stream_upstream_rr_peer_t *peer, **peerp; | |
122 ngx_stream_upstream_rr_peers_t *peers, *backup; | |
123 ngx_stream_upstream_srv_conf_t *uscf; | |
124 | |
125 uscf = shm_zone->data; | |
126 | |
127 if (ouscf) { | |
128 ngx_log_error(NGX_LOG_EMERG, shm_zone->shm.log, 0, | |
129 "zone \"%V\" cannot be reused", &shm_zone->shm.name); | |
130 return NGX_ERROR; | |
131 } | |
132 | |
133 shpool = (ngx_slab_pool_t *) shm_zone->shm.addr; | |
134 | |
135 if (shm_zone->shm.exists) { | |
136 return NGX_ERROR; | |
137 } | |
138 | |
139 | |
140 /* copy peers to shared memory */ | |
141 | |
142 len = sizeof(" in upstream zone \"\"") + shm_zone->shm.name.len; | |
143 | |
144 shpool->log_ctx = ngx_slab_alloc(shpool, len); | |
145 if (shpool->log_ctx == NULL) { | |
146 return NGX_ERROR; | |
147 } | |
148 | |
149 ngx_sprintf(shpool->log_ctx, " in upstream zone \"%V\"%Z", | |
150 &shm_zone->shm.name); | |
151 | |
152 peers = ngx_slab_alloc(shpool, sizeof(ngx_stream_upstream_rr_peers_t)); | |
153 if (peers == NULL) { | |
154 return NGX_ERROR; | |
155 } | |
156 | |
157 ngx_memcpy(peers, uscf->peer.data, sizeof(ngx_stream_upstream_rr_peers_t)); | |
158 | |
159 peers->shpool = shpool; | |
160 | |
161 for (peerp = &peers->peer; *peerp; peerp = &peer->next) { | |
162 /* pool is unlocked */ | |
163 peer = ngx_slab_calloc_locked(shpool, | |
164 sizeof(ngx_stream_upstream_rr_peer_t)); | |
165 if (peer == NULL) { | |
166 return NGX_ERROR; | |
167 } | |
168 | |
169 ngx_memcpy(peer, *peerp, sizeof(ngx_stream_upstream_rr_peer_t)); | |
170 | |
171 *peerp = peer; | |
172 } | |
173 | |
174 if (peers->next == NULL) { | |
175 goto done; | |
176 } | |
177 | |
178 backup = ngx_slab_alloc(shpool, sizeof(ngx_stream_upstream_rr_peers_t)); | |
179 if (backup == NULL) { | |
180 return NGX_ERROR; | |
181 } | |
182 | |
183 ngx_memcpy(backup, peers->next, sizeof(ngx_stream_upstream_rr_peers_t)); | |
184 | |
185 backup->shpool = shpool; | |
186 | |
187 for (peerp = &backup->peer; *peerp; peerp = &peer->next) { | |
188 /* pool is unlocked */ | |
189 peer = ngx_slab_calloc_locked(shpool, | |
190 sizeof(ngx_stream_upstream_rr_peer_t)); | |
191 if (peer == NULL) { | |
192 return NGX_ERROR; | |
193 } | |
194 | |
195 ngx_memcpy(peer, *peerp, sizeof(ngx_stream_upstream_rr_peer_t)); | |
196 | |
197 *peerp = peer; | |
198 } | |
199 | |
200 peers->next = backup; | |
201 | |
202 done: | |
203 | |
204 uscf->peer.data = peers; | |
205 | |
206 return NGX_OK; | |
207 } |