|
6103
|
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_http.h>
|
|
|
11
|
|
|
12
|
|
|
13 static char *ngx_http_upstream_zone(ngx_conf_t *cf, ngx_command_t *cmd,
|
|
|
14 void *conf);
|
|
|
15 static ngx_int_t ngx_http_upstream_init_zone(ngx_shm_zone_t *shm_zone,
|
|
|
16 void *data);
|
|
|
17
|
|
|
18
|
|
|
19 static ngx_command_t ngx_http_upstream_zone_commands[] = {
|
|
|
20
|
|
|
21 { ngx_string("zone"),
|
|
|
22 NGX_HTTP_UPS_CONF|NGX_CONF_TAKE2,
|
|
|
23 ngx_http_upstream_zone,
|
|
|
24 0,
|
|
|
25 0,
|
|
|
26 NULL },
|
|
|
27
|
|
|
28 ngx_null_command
|
|
|
29 };
|
|
|
30
|
|
|
31
|
|
|
32 static ngx_http_module_t ngx_http_upstream_zone_module_ctx = {
|
|
|
33 NULL, /* preconfiguration */
|
|
|
34 NULL, /* postconfiguration */
|
|
|
35
|
|
|
36 NULL, /* create main configuration */
|
|
|
37 NULL, /* init main configuration */
|
|
|
38
|
|
|
39 NULL, /* create server configuration */
|
|
|
40 NULL, /* merge server configuration */
|
|
|
41
|
|
|
42 NULL, /* create location configuration */
|
|
|
43 NULL /* merge location configuration */
|
|
|
44 };
|
|
|
45
|
|
|
46
|
|
|
47 ngx_module_t ngx_http_upstream_zone_module = {
|
|
|
48 NGX_MODULE_V1,
|
|
|
49 &ngx_http_upstream_zone_module_ctx, /* module context */
|
|
|
50 ngx_http_upstream_zone_commands, /* module directives */
|
|
|
51 NGX_HTTP_MODULE, /* module type */
|
|
|
52 NULL, /* init master */
|
|
|
53 NULL, /* init module */
|
|
|
54 NULL, /* init process */
|
|
|
55 NULL, /* init thread */
|
|
|
56 NULL, /* exit thread */
|
|
|
57 NULL, /* exit process */
|
|
|
58 NULL, /* exit master */
|
|
|
59 NGX_MODULE_V1_PADDING
|
|
|
60 };
|
|
|
61
|
|
|
62
|
|
|
63 static char *
|
|
|
64 ngx_http_upstream_zone(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
|
|
|
65 {
|
|
|
66 ngx_http_upstream_srv_conf_t *uscf;
|
|
|
67 ssize_t size;
|
|
|
68 ngx_str_t *value;
|
|
|
69
|
|
|
70 uscf = ngx_http_conf_get_module_srv_conf(cf, ngx_http_upstream_module);
|
|
|
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
|
|
|
80 size = ngx_parse_size(&value[2]);
|
|
|
81
|
|
|
82 if (size == NGX_ERROR) {
|
|
|
83 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
|
84 "invalid zone size \"%V\"", &value[2]);
|
|
|
85 return NGX_CONF_ERROR;
|
|
|
86 }
|
|
|
87
|
|
|
88 if (size < (ssize_t) (8 * ngx_pagesize)) {
|
|
|
89 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
|
90 "zone \"%V\" is too small", &value[1]);
|
|
|
91 return NGX_CONF_ERROR;
|
|
|
92 }
|
|
|
93
|
|
|
94 uscf->shm_zone = ngx_shared_memory_add(cf, &value[1], size,
|
|
|
95 &ngx_http_upstream_module);
|
|
|
96 if (uscf->shm_zone == NULL) {
|
|
|
97 return NGX_CONF_ERROR;
|
|
|
98 }
|
|
|
99
|
|
|
100 if (uscf->shm_zone->data) {
|
|
|
101 uscf = uscf->shm_zone->data;
|
|
|
102
|
|
|
103 ngx_conf_log_error(NGX_LOG_WARN, cf, 0,
|
|
|
104 "upstream \"%V\" in %s:%ui "
|
|
|
105 "is already bound to zone \"%V\"",
|
|
|
106 &uscf->host, uscf->file_name, uscf->line,
|
|
|
107 &value[1]);
|
|
|
108 return NGX_CONF_ERROR;
|
|
|
109 }
|
|
|
110
|
|
|
111 uscf->shm_zone->init = ngx_http_upstream_init_zone;
|
|
|
112 uscf->shm_zone->data = uscf;
|
|
|
113
|
|
|
114 uscf->shm_zone->noreuse = 1;
|
|
|
115
|
|
|
116 return NGX_CONF_OK;
|
|
|
117 }
|
|
|
118
|
|
|
119
|
|
|
120 static ngx_int_t
|
|
|
121 ngx_http_upstream_init_zone(ngx_shm_zone_t *shm_zone, void *data)
|
|
|
122 {
|
|
|
123 ngx_http_upstream_srv_conf_t *ouscf = data;
|
|
|
124
|
|
|
125 size_t len;
|
|
|
126 ngx_slab_pool_t *shpool;
|
|
|
127 ngx_http_upstream_rr_peer_t *peer, **peerp;
|
|
|
128 ngx_http_upstream_rr_peers_t *peers, *backup;
|
|
|
129 ngx_http_upstream_srv_conf_t *uscf;
|
|
|
130
|
|
|
131 uscf = shm_zone->data;
|
|
|
132
|
|
|
133 if (ouscf) {
|
|
|
134 ngx_log_error(NGX_LOG_EMERG, shm_zone->shm.log, 0,
|
|
|
135 "zone \"%V\" cannot be reused", &shm_zone->shm.name);
|
|
|
136 return NGX_ERROR;
|
|
|
137 }
|
|
|
138
|
|
|
139 shpool = (ngx_slab_pool_t *) shm_zone->shm.addr;
|
|
|
140
|
|
|
141 if (shm_zone->shm.exists) {
|
|
|
142 return NGX_ERROR;
|
|
|
143 }
|
|
|
144
|
|
|
145
|
|
|
146 /* copy peers to shared memory */
|
|
|
147
|
|
|
148 len = sizeof(" in upstream zone \"\"") + shm_zone->shm.name.len;
|
|
|
149
|
|
|
150 shpool->log_ctx = ngx_slab_alloc(shpool, len);
|
|
|
151 if (shpool->log_ctx == NULL) {
|
|
|
152 return NGX_ERROR;
|
|
|
153 }
|
|
|
154
|
|
|
155 ngx_sprintf(shpool->log_ctx, " in upstream zone \"%V\"%Z",
|
|
|
156 &shm_zone->shm.name);
|
|
|
157
|
|
|
158 peers = ngx_slab_alloc(shpool, sizeof(ngx_http_upstream_rr_peers_t));
|
|
|
159 if (peers == NULL) {
|
|
|
160 return NGX_ERROR;
|
|
|
161 }
|
|
|
162
|
|
|
163 ngx_memcpy(peers, uscf->peer.data, sizeof(ngx_http_upstream_rr_peers_t));
|
|
|
164
|
|
|
165 peers->shpool = shpool;
|
|
|
166
|
|
|
167 for (peerp = &peers->peer; *peerp; peerp = &peer->next) {
|
|
|
168 /* pool is unlocked */
|
|
|
169 peer = ngx_slab_calloc_locked(shpool,
|
|
|
170 sizeof(ngx_http_upstream_rr_peer_t));
|
|
|
171 if (peer == NULL) {
|
|
|
172 return NGX_ERROR;
|
|
|
173 }
|
|
|
174
|
|
|
175 ngx_memcpy(peer, *peerp, sizeof(ngx_http_upstream_rr_peer_t));
|
|
|
176
|
|
|
177 *peerp = peer;
|
|
|
178 }
|
|
|
179
|
|
|
180 if (peers->next == NULL) {
|
|
|
181 goto done;
|
|
|
182 }
|
|
|
183
|
|
|
184 backup = ngx_slab_alloc(shpool, sizeof(ngx_http_upstream_rr_peers_t));
|
|
|
185 if (backup == NULL) {
|
|
|
186 return NGX_ERROR;
|
|
|
187 }
|
|
|
188
|
|
|
189 ngx_memcpy(backup, peers->next, sizeof(ngx_http_upstream_rr_peers_t));
|
|
|
190
|
|
|
191 backup->shpool = shpool;
|
|
|
192
|
|
|
193 for (peerp = &backup->peer; *peerp; peerp = &peer->next) {
|
|
|
194 /* pool is unlocked */
|
|
|
195 peer = ngx_slab_calloc_locked(shpool,
|
|
|
196 sizeof(ngx_http_upstream_rr_peer_t));
|
|
|
197 if (peer == NULL) {
|
|
|
198 return NGX_ERROR;
|
|
|
199 }
|
|
|
200
|
|
|
201 ngx_memcpy(peer, *peerp, sizeof(ngx_http_upstream_rr_peer_t));
|
|
|
202
|
|
|
203 *peerp = peer;
|
|
|
204 }
|
|
|
205
|
|
|
206 peers->next = backup;
|
|
|
207
|
|
|
208 done:
|
|
|
209
|
|
|
210 uscf->peer.data = peers;
|
|
|
211
|
|
|
212 return NGX_OK;
|
|
|
213 }
|
