Mercurial > hg > nginx
annotate src/stream/ngx_stream_upstream_round_robin.c @ 6712:fd5c2781460b
Modules compatibility: upstream config field.
It is to be used to track version of an upstream configuration used for
request processing.
| author | Maxim Dounin <mdounin@mdounin.ru> |
|---|---|
| date | Thu, 29 Sep 2016 18:06:04 +0300 |
| parents | 829468da49d6 |
| children | d1d0dd69a419 |
| rev | line source |
|---|---|
| 6115 | 1 |
| 2 /* | |
| 3 * Copyright (C) Igor Sysoev | |
| 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 #define ngx_stream_upstream_tries(p) ((p)->number \ | |
| 14 + ((p)->next ? (p)->next->number : 0)) | |
| 15 | |
| 16 | |
| 17 static ngx_stream_upstream_rr_peer_t *ngx_stream_upstream_get_peer( | |
| 18 ngx_stream_upstream_rr_peer_data_t *rrp); | |
| 19 | |
| 20 #if (NGX_STREAM_SSL) | |
| 21 | |
| 22 static ngx_int_t ngx_stream_upstream_set_round_robin_peer_session( | |
| 23 ngx_peer_connection_t *pc, void *data); | |
| 24 static void ngx_stream_upstream_save_round_robin_peer_session( | |
| 25 ngx_peer_connection_t *pc, void *data); | |
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26 static ngx_int_t ngx_stream_upstream_empty_set_session( |
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27 ngx_peer_connection_t *pc, void *data); |
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28 static void ngx_stream_upstream_empty_save_session(ngx_peer_connection_t *pc, |
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29 void *data); |
| 6115 | 30 |
| 31 #endif | |
| 32 | |
| 33 | |
| 34 ngx_int_t | |
| 35 ngx_stream_upstream_init_round_robin(ngx_conf_t *cf, | |
| 36 ngx_stream_upstream_srv_conf_t *us) | |
| 37 { | |
| 38 ngx_url_t u; | |
| 39 ngx_uint_t i, j, n, w; | |
| 40 ngx_stream_upstream_server_t *server; | |
| 41 ngx_stream_upstream_rr_peer_t *peer, **peerp; | |
| 42 ngx_stream_upstream_rr_peers_t *peers, *backup; | |
| 43 | |
| 44 us->peer.init = ngx_stream_upstream_init_round_robin_peer; | |
| 45 | |
| 46 if (us->servers) { | |
| 47 server = us->servers->elts; | |
| 48 | |
| 49 n = 0; | |
| 50 w = 0; | |
| 51 | |
| 52 for (i = 0; i < us->servers->nelts; i++) { | |
| 53 if (server[i].backup) { | |
| 54 continue; | |
| 55 } | |
| 56 | |
| 57 n += server[i].naddrs; | |
| 58 w += server[i].naddrs * server[i].weight; | |
| 59 } | |
| 60 | |
| 61 if (n == 0) { | |
| 62 ngx_log_error(NGX_LOG_EMERG, cf->log, 0, | |
| 63 "no servers in upstream \"%V\" in %s:%ui", | |
| 64 &us->host, us->file_name, us->line); | |
| 65 return NGX_ERROR; | |
| 66 } | |
| 67 | |
| 68 peers = ngx_pcalloc(cf->pool, sizeof(ngx_stream_upstream_rr_peers_t)); | |
| 69 if (peers == NULL) { | |
| 70 return NGX_ERROR; | |
| 71 } | |
| 72 | |
| 73 peer = ngx_pcalloc(cf->pool, sizeof(ngx_stream_upstream_rr_peer_t) * n); | |
| 74 if (peer == NULL) { | |
| 75 return NGX_ERROR; | |
| 76 } | |
| 77 | |
| 78 peers->single = (n == 1); | |
| 79 peers->number = n; | |
| 80 peers->weighted = (w != n); | |
| 81 peers->total_weight = w; | |
| 82 peers->name = &us->host; | |
| 83 | |
| 84 n = 0; | |
| 85 peerp = &peers->peer; | |
| 86 | |
| 87 for (i = 0; i < us->servers->nelts; i++) { | |
| 88 if (server[i].backup) { | |
| 89 continue; | |
| 90 } | |
| 91 | |
| 92 for (j = 0; j < server[i].naddrs; j++) { | |
| 93 peer[n].sockaddr = server[i].addrs[j].sockaddr; | |
| 94 peer[n].socklen = server[i].addrs[j].socklen; | |
| 95 peer[n].name = server[i].addrs[j].name; | |
| 96 peer[n].weight = server[i].weight; | |
| 97 peer[n].effective_weight = server[i].weight; | |
| 98 peer[n].current_weight = 0; | |
| 6705 | 99 peer[n].max_conns = server[i].max_conns; |
| 6115 | 100 peer[n].max_fails = server[i].max_fails; |
| 101 peer[n].fail_timeout = server[i].fail_timeout; | |
| 102 peer[n].down = server[i].down; | |
| 103 peer[n].server = server[i].name; | |
| 104 | |
| 105 *peerp = &peer[n]; | |
| 106 peerp = &peer[n].next; | |
| 107 n++; | |
| 108 } | |
| 109 } | |
| 110 | |
| 111 us->peer.data = peers; | |
| 112 | |
| 113 /* backup servers */ | |
| 114 | |
| 115 n = 0; | |
| 116 w = 0; | |
| 117 | |
| 118 for (i = 0; i < us->servers->nelts; i++) { | |
| 119 if (!server[i].backup) { | |
| 120 continue; | |
| 121 } | |
| 122 | |
| 123 n += server[i].naddrs; | |
| 124 w += server[i].naddrs * server[i].weight; | |
| 125 } | |
| 126 | |
| 127 if (n == 0) { | |
| 128 return NGX_OK; | |
| 129 } | |
| 130 | |
| 131 backup = ngx_pcalloc(cf->pool, sizeof(ngx_stream_upstream_rr_peers_t)); | |
| 132 if (backup == NULL) { | |
| 133 return NGX_ERROR; | |
| 134 } | |
| 135 | |
| 136 peer = ngx_pcalloc(cf->pool, sizeof(ngx_stream_upstream_rr_peer_t) * n); | |
| 137 if (peer == NULL) { | |
| 138 return NGX_ERROR; | |
| 139 } | |
| 140 | |
| 141 peers->single = 0; | |
| 142 backup->single = 0; | |
| 143 backup->number = n; | |
| 144 backup->weighted = (w != n); | |
| 145 backup->total_weight = w; | |
| 146 backup->name = &us->host; | |
| 147 | |
| 148 n = 0; | |
| 149 peerp = &backup->peer; | |
| 150 | |
| 151 for (i = 0; i < us->servers->nelts; i++) { | |
| 152 if (!server[i].backup) { | |
| 153 continue; | |
| 154 } | |
| 155 | |
| 156 for (j = 0; j < server[i].naddrs; j++) { | |
| 157 peer[n].sockaddr = server[i].addrs[j].sockaddr; | |
| 158 peer[n].socklen = server[i].addrs[j].socklen; | |
| 159 peer[n].name = server[i].addrs[j].name; | |
| 160 peer[n].weight = server[i].weight; | |
| 161 peer[n].effective_weight = server[i].weight; | |
| 162 peer[n].current_weight = 0; | |
| 6705 | 163 peer[n].max_conns = server[i].max_conns; |
| 6115 | 164 peer[n].max_fails = server[i].max_fails; |
| 165 peer[n].fail_timeout = server[i].fail_timeout; | |
| 166 peer[n].down = server[i].down; | |
| 167 peer[n].server = server[i].name; | |
| 168 | |
| 169 *peerp = &peer[n]; | |
| 170 peerp = &peer[n].next; | |
| 171 n++; | |
| 172 } | |
| 173 } | |
| 174 | |
| 175 peers->next = backup; | |
| 176 | |
| 177 return NGX_OK; | |
| 178 } | |
| 179 | |
| 180 | |
| 181 /* an upstream implicitly defined by proxy_pass, etc. */ | |
| 182 | |
| 183 if (us->port == 0) { | |
| 184 ngx_log_error(NGX_LOG_EMERG, cf->log, 0, | |
| 185 "no port in upstream \"%V\" in %s:%ui", | |
| 186 &us->host, us->file_name, us->line); | |
| 187 return NGX_ERROR; | |
| 188 } | |
| 189 | |
| 190 ngx_memzero(&u, sizeof(ngx_url_t)); | |
| 191 | |
| 192 u.host = us->host; | |
| 193 u.port = us->port; | |
| 194 | |
| 195 if (ngx_inet_resolve_host(cf->pool, &u) != NGX_OK) { | |
| 196 if (u.err) { | |
| 197 ngx_log_error(NGX_LOG_EMERG, cf->log, 0, | |
| 198 "%s in upstream \"%V\" in %s:%ui", | |
| 199 u.err, &us->host, us->file_name, us->line); | |
| 200 } | |
| 201 | |
| 202 return NGX_ERROR; | |
| 203 } | |
| 204 | |
| 205 n = u.naddrs; | |
| 206 | |
| 207 peers = ngx_pcalloc(cf->pool, sizeof(ngx_stream_upstream_rr_peers_t)); | |
| 208 if (peers == NULL) { | |
| 209 return NGX_ERROR; | |
| 210 } | |
| 211 | |
| 212 peer = ngx_pcalloc(cf->pool, sizeof(ngx_stream_upstream_rr_peer_t) * n); | |
| 213 if (peer == NULL) { | |
| 214 return NGX_ERROR; | |
| 215 } | |
| 216 | |
| 217 peers->single = (n == 1); | |
| 218 peers->number = n; | |
| 219 peers->weighted = 0; | |
| 220 peers->total_weight = n; | |
| 221 peers->name = &us->host; | |
| 222 | |
| 223 peerp = &peers->peer; | |
| 224 | |
| 225 for (i = 0; i < u.naddrs; i++) { | |
| 226 peer[i].sockaddr = u.addrs[i].sockaddr; | |
| 227 peer[i].socklen = u.addrs[i].socklen; | |
| 228 peer[i].name = u.addrs[i].name; | |
| 229 peer[i].weight = 1; | |
| 230 peer[i].effective_weight = 1; | |
| 231 peer[i].current_weight = 0; | |
| 6705 | 232 peer[i].max_conns = 0; |
| 6115 | 233 peer[i].max_fails = 1; |
| 234 peer[i].fail_timeout = 10; | |
| 235 *peerp = &peer[i]; | |
| 236 peerp = &peer[i].next; | |
| 237 } | |
| 238 | |
| 239 us->peer.data = peers; | |
| 240 | |
| 241 /* implicitly defined upstream has no backup servers */ | |
| 242 | |
| 243 return NGX_OK; | |
| 244 } | |
| 245 | |
| 246 | |
| 247 ngx_int_t | |
| 248 ngx_stream_upstream_init_round_robin_peer(ngx_stream_session_t *s, | |
| 249 ngx_stream_upstream_srv_conf_t *us) | |
| 250 { | |
| 251 ngx_uint_t n; | |
| 252 ngx_stream_upstream_rr_peer_data_t *rrp; | |
| 253 | |
| 254 rrp = s->upstream->peer.data; | |
| 255 | |
| 256 if (rrp == NULL) { | |
| 257 rrp = ngx_palloc(s->connection->pool, | |
| 258 sizeof(ngx_stream_upstream_rr_peer_data_t)); | |
| 259 if (rrp == NULL) { | |
| 260 return NGX_ERROR; | |
| 261 } | |
| 262 | |
| 263 s->upstream->peer.data = rrp; | |
| 264 } | |
| 265 | |
| 266 rrp->peers = us->peer.data; | |
| 267 rrp->current = NULL; | |
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268 rrp->config = 0; |
| 6115 | 269 |
| 270 n = rrp->peers->number; | |
| 271 | |
| 272 if (rrp->peers->next && rrp->peers->next->number > n) { | |
| 273 n = rrp->peers->next->number; | |
| 274 } | |
| 275 | |
| 276 if (n <= 8 * sizeof(uintptr_t)) { | |
| 277 rrp->tried = &rrp->data; | |
| 278 rrp->data = 0; | |
| 279 | |
| 280 } else { | |
| 281 n = (n + (8 * sizeof(uintptr_t) - 1)) / (8 * sizeof(uintptr_t)); | |
| 282 | |
| 283 rrp->tried = ngx_pcalloc(s->connection->pool, n * sizeof(uintptr_t)); | |
| 284 if (rrp->tried == NULL) { | |
| 285 return NGX_ERROR; | |
| 286 } | |
| 287 } | |
| 288 | |
| 289 s->upstream->peer.get = ngx_stream_upstream_get_round_robin_peer; | |
| 290 s->upstream->peer.free = ngx_stream_upstream_free_round_robin_peer; | |
| 291 s->upstream->peer.tries = ngx_stream_upstream_tries(rrp->peers); | |
| 292 #if (NGX_STREAM_SSL) | |
| 293 s->upstream->peer.set_session = | |
| 294 ngx_stream_upstream_set_round_robin_peer_session; | |
| 295 s->upstream->peer.save_session = | |
| 296 ngx_stream_upstream_save_round_robin_peer_session; | |
| 297 #endif | |
| 298 | |
| 299 return NGX_OK; | |
| 300 } | |
| 301 | |
| 302 | |
| 303 ngx_int_t | |
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304 ngx_stream_upstream_create_round_robin_peer(ngx_stream_session_t *s, |
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305 ngx_stream_upstream_resolved_t *ur) |
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306 { |
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307 u_char *p; |
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308 size_t len; |
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309 socklen_t socklen; |
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310 ngx_uint_t i, n; |
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311 struct sockaddr *sockaddr; |
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312 ngx_stream_upstream_rr_peer_t *peer, **peerp; |
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313 ngx_stream_upstream_rr_peers_t *peers; |
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314 ngx_stream_upstream_rr_peer_data_t *rrp; |
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315 |
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316 rrp = s->upstream->peer.data; |
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317 |
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318 if (rrp == NULL) { |
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319 rrp = ngx_palloc(s->connection->pool, |
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320 sizeof(ngx_stream_upstream_rr_peer_data_t)); |
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321 if (rrp == NULL) { |
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322 return NGX_ERROR; |
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323 } |
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324 |
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325 s->upstream->peer.data = rrp; |
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326 } |
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327 |
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328 peers = ngx_pcalloc(s->connection->pool, |
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329 sizeof(ngx_stream_upstream_rr_peers_t)); |
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330 if (peers == NULL) { |
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331 return NGX_ERROR; |
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332 } |
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333 |
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334 peer = ngx_pcalloc(s->connection->pool, |
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335 sizeof(ngx_stream_upstream_rr_peer_t) * ur->naddrs); |
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336 if (peer == NULL) { |
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337 return NGX_ERROR; |
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338 } |
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339 |
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340 peers->single = (ur->naddrs == 1); |
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341 peers->number = ur->naddrs; |
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342 peers->name = &ur->host; |
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343 |
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344 if (ur->sockaddr) { |
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345 peer[0].sockaddr = ur->sockaddr; |
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346 peer[0].socklen = ur->socklen; |
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347 peer[0].name = ur->host; |
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348 peer[0].weight = 1; |
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349 peer[0].effective_weight = 1; |
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350 peer[0].current_weight = 0; |
| 6706 | 351 peer[0].max_conns = 0; |
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352 peer[0].max_fails = 1; |
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353 peer[0].fail_timeout = 10; |
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354 peers->peer = peer; |
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355 |
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356 } else { |
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357 peerp = &peers->peer; |
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358 |
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359 for (i = 0; i < ur->naddrs; i++) { |
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360 |
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361 socklen = ur->addrs[i].socklen; |
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362 |
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363 sockaddr = ngx_palloc(s->connection->pool, socklen); |
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364 if (sockaddr == NULL) { |
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365 return NGX_ERROR; |
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366 } |
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367 |
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368 ngx_memcpy(sockaddr, ur->addrs[i].sockaddr, socklen); |
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369 ngx_inet_set_port(sockaddr, ur->port); |
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370 |
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371 p = ngx_pnalloc(s->connection->pool, NGX_SOCKADDR_STRLEN); |
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372 if (p == NULL) { |
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373 return NGX_ERROR; |
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374 } |
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375 |
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376 len = ngx_sock_ntop(sockaddr, socklen, p, NGX_SOCKADDR_STRLEN, 1); |
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377 |
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378 peer[i].sockaddr = sockaddr; |
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379 peer[i].socklen = socklen; |
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380 peer[i].name.len = len; |
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381 peer[i].name.data = p; |
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382 peer[i].weight = 1; |
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383 peer[i].effective_weight = 1; |
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384 peer[i].current_weight = 0; |
| 6706 | 385 peer[i].max_conns = 0; |
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386 peer[i].max_fails = 1; |
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387 peer[i].fail_timeout = 10; |
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388 *peerp = &peer[i]; |
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389 peerp = &peer[i].next; |
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390 } |
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391 } |
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392 |
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393 rrp->peers = peers; |
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394 rrp->current = NULL; |
|
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395 rrp->config = 0; |
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396 |
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397 if (rrp->peers->number <= 8 * sizeof(uintptr_t)) { |
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398 rrp->tried = &rrp->data; |
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399 rrp->data = 0; |
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400 |
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401 } else { |
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402 n = (rrp->peers->number + (8 * sizeof(uintptr_t) - 1)) |
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403 / (8 * sizeof(uintptr_t)); |
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404 |
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405 rrp->tried = ngx_pcalloc(s->connection->pool, n * sizeof(uintptr_t)); |
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406 if (rrp->tried == NULL) { |
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407 return NGX_ERROR; |
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408 } |
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409 } |
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410 |
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411 s->upstream->peer.get = ngx_stream_upstream_get_round_robin_peer; |
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412 s->upstream->peer.free = ngx_stream_upstream_free_round_robin_peer; |
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413 s->upstream->peer.tries = ngx_stream_upstream_tries(rrp->peers); |
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414 #if (NGX_STREAM_SSL) |
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415 s->upstream->peer.set_session = ngx_stream_upstream_empty_set_session; |
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416 s->upstream->peer.save_session = ngx_stream_upstream_empty_save_session; |
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417 #endif |
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418 |
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419 return NGX_OK; |
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420 } |
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421 |
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422 |
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423 ngx_int_t |
| 6115 | 424 ngx_stream_upstream_get_round_robin_peer(ngx_peer_connection_t *pc, void *data) |
| 425 { | |
| 426 ngx_stream_upstream_rr_peer_data_t *rrp = data; | |
| 427 | |
| 428 ngx_int_t rc; | |
| 429 ngx_uint_t i, n; | |
| 430 ngx_stream_upstream_rr_peer_t *peer; | |
| 431 ngx_stream_upstream_rr_peers_t *peers; | |
| 432 | |
| 433 ngx_log_debug1(NGX_LOG_DEBUG_STREAM, pc->log, 0, | |
| 434 "get rr peer, try: %ui", pc->tries); | |
| 435 | |
| 436 pc->connection = NULL; | |
| 437 | |
| 438 peers = rrp->peers; | |
| 439 ngx_stream_upstream_rr_peers_wlock(peers); | |
| 440 | |
| 441 if (peers->single) { | |
| 442 peer = peers->peer; | |
| 443 | |
| 444 if (peer->down) { | |
| 445 goto failed; | |
| 446 } | |
| 447 | |
| 6705 | 448 if (peer->max_conns && peer->conns >= peer->max_conns) { |
| 449 goto failed; | |
| 450 } | |
| 451 | |
| 6115 | 452 rrp->current = peer; |
| 453 | |
| 454 } else { | |
| 455 | |
| 456 /* there are several peers */ | |
| 457 | |
| 458 peer = ngx_stream_upstream_get_peer(rrp); | |
| 459 | |
| 460 if (peer == NULL) { | |
| 461 goto failed; | |
| 462 } | |
| 463 | |
| 464 ngx_log_debug2(NGX_LOG_DEBUG_STREAM, pc->log, 0, | |
| 465 "get rr peer, current: %p %i", | |
| 466 peer, peer->current_weight); | |
| 467 } | |
| 468 | |
| 469 pc->sockaddr = peer->sockaddr; | |
| 470 pc->socklen = peer->socklen; | |
| 471 pc->name = &peer->name; | |
| 472 | |
| 473 peer->conns++; | |
| 474 | |
| 475 ngx_stream_upstream_rr_peers_unlock(peers); | |
| 476 | |
| 477 return NGX_OK; | |
| 478 | |
| 479 failed: | |
| 480 | |
| 481 if (peers->next) { | |
| 482 | |
| 483 ngx_log_debug0(NGX_LOG_DEBUG_STREAM, pc->log, 0, "backup servers"); | |
| 484 | |
| 485 rrp->peers = peers->next; | |
| 486 | |
| 487 n = (rrp->peers->number + (8 * sizeof(uintptr_t) - 1)) | |
| 488 / (8 * sizeof(uintptr_t)); | |
| 489 | |
| 490 for (i = 0; i < n; i++) { | |
| 6474 | 491 rrp->tried[i] = 0; |
| 6115 | 492 } |
| 493 | |
| 494 ngx_stream_upstream_rr_peers_unlock(peers); | |
| 495 | |
| 496 rc = ngx_stream_upstream_get_round_robin_peer(pc, rrp); | |
| 497 | |
| 498 if (rc != NGX_BUSY) { | |
| 499 return rc; | |
| 500 } | |
| 501 | |
| 502 ngx_stream_upstream_rr_peers_wlock(peers); | |
| 503 } | |
| 504 | |
| 505 ngx_stream_upstream_rr_peers_unlock(peers); | |
| 506 | |
| 507 pc->name = peers->name; | |
| 508 | |
| 509 return NGX_BUSY; | |
| 510 } | |
| 511 | |
| 512 | |
| 513 static ngx_stream_upstream_rr_peer_t * | |
| 514 ngx_stream_upstream_get_peer(ngx_stream_upstream_rr_peer_data_t *rrp) | |
| 515 { | |
| 516 time_t now; | |
| 517 uintptr_t m; | |
| 518 ngx_int_t total; | |
| 519 ngx_uint_t i, n, p; | |
| 520 ngx_stream_upstream_rr_peer_t *peer, *best; | |
| 521 | |
| 522 now = ngx_time(); | |
| 523 | |
| 524 best = NULL; | |
| 525 total = 0; | |
| 526 | |
| 527 #if (NGX_SUPPRESS_WARN) | |
| 528 p = 0; | |
| 529 #endif | |
| 530 | |
| 531 for (peer = rrp->peers->peer, i = 0; | |
| 532 peer; | |
| 533 peer = peer->next, i++) | |
| 534 { | |
| 535 n = i / (8 * sizeof(uintptr_t)); | |
| 536 m = (uintptr_t) 1 << i % (8 * sizeof(uintptr_t)); | |
| 537 | |
| 538 if (rrp->tried[n] & m) { | |
| 539 continue; | |
| 540 } | |
| 541 | |
| 542 if (peer->down) { | |
| 543 continue; | |
| 544 } | |
| 545 | |
| 546 if (peer->max_fails | |
| 547 && peer->fails >= peer->max_fails | |
| 548 && now - peer->checked <= peer->fail_timeout) | |
| 549 { | |
| 550 continue; | |
| 551 } | |
| 552 | |
| 6705 | 553 if (peer->max_conns && peer->conns >= peer->max_conns) { |
| 554 continue; | |
| 555 } | |
| 556 | |
| 6115 | 557 peer->current_weight += peer->effective_weight; |
| 558 total += peer->effective_weight; | |
| 559 | |
| 560 if (peer->effective_weight < peer->weight) { | |
| 561 peer->effective_weight++; | |
| 562 } | |
| 563 | |
| 564 if (best == NULL || peer->current_weight > best->current_weight) { | |
| 565 best = peer; | |
| 566 p = i; | |
| 567 } | |
| 568 } | |
| 569 | |
| 570 if (best == NULL) { | |
| 571 return NULL; | |
| 572 } | |
| 573 | |
| 574 rrp->current = best; | |
| 575 | |
| 576 n = p / (8 * sizeof(uintptr_t)); | |
| 577 m = (uintptr_t) 1 << p % (8 * sizeof(uintptr_t)); | |
| 578 | |
| 579 rrp->tried[n] |= m; | |
| 580 | |
| 581 best->current_weight -= total; | |
| 582 | |
| 583 if (now - best->checked > best->fail_timeout) { | |
| 584 best->checked = now; | |
| 585 } | |
| 586 | |
| 587 return best; | |
| 588 } | |
| 589 | |
| 590 | |
| 591 void | |
| 592 ngx_stream_upstream_free_round_robin_peer(ngx_peer_connection_t *pc, void *data, | |
| 593 ngx_uint_t state) | |
| 594 { | |
| 595 ngx_stream_upstream_rr_peer_data_t *rrp = data; | |
| 596 | |
| 597 time_t now; | |
| 598 ngx_stream_upstream_rr_peer_t *peer; | |
| 599 | |
| 600 ngx_log_debug2(NGX_LOG_DEBUG_STREAM, pc->log, 0, | |
| 601 "free rr peer %ui %ui", pc->tries, state); | |
| 602 | |
| 603 peer = rrp->current; | |
| 604 | |
| 605 ngx_stream_upstream_rr_peers_rlock(rrp->peers); | |
| 606 ngx_stream_upstream_rr_peer_lock(rrp->peers, peer); | |
| 607 | |
| 608 if (rrp->peers->single) { | |
| 609 peer->conns--; | |
| 610 | |
| 611 ngx_stream_upstream_rr_peer_unlock(rrp->peers, peer); | |
| 612 ngx_stream_upstream_rr_peers_unlock(rrp->peers); | |
| 613 | |
| 614 pc->tries = 0; | |
| 615 return; | |
| 616 } | |
| 617 | |
| 618 if (state & NGX_PEER_FAILED) { | |
| 619 now = ngx_time(); | |
| 620 | |
| 621 peer->fails++; | |
| 622 peer->accessed = now; | |
| 623 peer->checked = now; | |
| 624 | |
| 625 if (peer->max_fails) { | |
| 626 peer->effective_weight -= peer->weight / peer->max_fails; | |
|
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627 |
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628 if (peer->fails >= peer->max_fails) { |
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629 ngx_log_error(NGX_LOG_WARN, pc->log, 0, |
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630 "upstream server temporarily disabled"); |
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631 } |
| 6115 | 632 } |
| 633 | |
| 634 ngx_log_debug2(NGX_LOG_DEBUG_STREAM, pc->log, 0, | |
| 635 "free rr peer failed: %p %i", | |
| 636 peer, peer->effective_weight); | |
| 637 | |
| 638 if (peer->effective_weight < 0) { | |
| 639 peer->effective_weight = 0; | |
| 640 } | |
| 641 | |
| 642 } else { | |
| 643 | |
| 644 /* mark peer live if check passed */ | |
| 645 | |
| 646 if (peer->accessed < peer->checked) { | |
| 647 peer->fails = 0; | |
| 648 } | |
| 649 } | |
| 650 | |
| 651 peer->conns--; | |
| 652 | |
| 653 ngx_stream_upstream_rr_peer_unlock(rrp->peers, peer); | |
| 654 ngx_stream_upstream_rr_peers_unlock(rrp->peers); | |
| 655 | |
| 656 if (pc->tries) { | |
| 657 pc->tries--; | |
| 658 } | |
| 659 } | |
| 660 | |
| 661 | |
| 662 #if (NGX_STREAM_SSL) | |
| 663 | |
| 664 static ngx_int_t | |
| 665 ngx_stream_upstream_set_round_robin_peer_session(ngx_peer_connection_t *pc, | |
| 666 void *data) | |
| 667 { | |
| 668 ngx_stream_upstream_rr_peer_data_t *rrp = data; | |
| 669 | |
| 670 ngx_int_t rc; | |
| 671 ngx_ssl_session_t *ssl_session; | |
| 672 ngx_stream_upstream_rr_peer_t *peer; | |
| 673 #if (NGX_STREAM_UPSTREAM_ZONE) | |
| 674 int len; | |
| 675 #if OPENSSL_VERSION_NUMBER >= 0x0090707fL | |
| 676 const | |
| 677 #endif | |
| 678 u_char *p; | |
| 679 ngx_stream_upstream_rr_peers_t *peers; | |
| 680 u_char buf[NGX_SSL_MAX_SESSION_SIZE]; | |
| 681 #endif | |
| 682 | |
| 683 peer = rrp->current; | |
| 684 | |
| 685 #if (NGX_STREAM_UPSTREAM_ZONE) | |
| 686 peers = rrp->peers; | |
| 687 | |
| 688 if (peers->shpool) { | |
| 689 ngx_stream_upstream_rr_peers_rlock(peers); | |
| 690 ngx_stream_upstream_rr_peer_lock(peers, peer); | |
| 691 | |
| 692 if (peer->ssl_session == NULL) { | |
| 693 ngx_stream_upstream_rr_peer_unlock(peers, peer); | |
| 694 ngx_stream_upstream_rr_peers_unlock(peers); | |
| 695 return NGX_OK; | |
| 696 } | |
| 697 | |
| 698 len = peer->ssl_session_len; | |
| 699 | |
| 700 ngx_memcpy(buf, peer->ssl_session, len); | |
| 701 | |
| 702 ngx_stream_upstream_rr_peer_unlock(peers, peer); | |
| 703 ngx_stream_upstream_rr_peers_unlock(peers); | |
| 704 | |
| 705 p = buf; | |
| 706 ssl_session = d2i_SSL_SESSION(NULL, &p, len); | |
| 707 | |
| 708 rc = ngx_ssl_set_session(pc->connection, ssl_session); | |
| 709 | |
| 710 ngx_log_debug1(NGX_LOG_DEBUG_STREAM, pc->log, 0, | |
| 711 "set session: %p", ssl_session); | |
| 712 | |
| 713 ngx_ssl_free_session(ssl_session); | |
| 714 | |
| 715 return rc; | |
| 716 } | |
| 717 #endif | |
| 718 | |
| 719 ssl_session = peer->ssl_session; | |
| 720 | |
| 721 rc = ngx_ssl_set_session(pc->connection, ssl_session); | |
| 722 | |
| 723 ngx_log_debug1(NGX_LOG_DEBUG_STREAM, pc->log, 0, | |
| 724 "set session: %p", ssl_session); | |
| 725 | |
| 726 return rc; | |
| 727 } | |
| 728 | |
| 729 | |
| 730 static void | |
| 731 ngx_stream_upstream_save_round_robin_peer_session(ngx_peer_connection_t *pc, | |
| 732 void *data) | |
| 733 { | |
| 734 ngx_stream_upstream_rr_peer_data_t *rrp = data; | |
| 735 | |
| 736 ngx_ssl_session_t *old_ssl_session, *ssl_session; | |
| 737 ngx_stream_upstream_rr_peer_t *peer; | |
| 738 #if (NGX_STREAM_UPSTREAM_ZONE) | |
| 739 int len; | |
| 740 u_char *p; | |
| 741 ngx_stream_upstream_rr_peers_t *peers; | |
| 742 u_char buf[NGX_SSL_MAX_SESSION_SIZE]; | |
| 743 #endif | |
| 744 | |
| 745 #if (NGX_STREAM_UPSTREAM_ZONE) | |
| 746 peers = rrp->peers; | |
| 747 | |
| 748 if (peers->shpool) { | |
| 749 | |
| 750 ssl_session = SSL_get0_session(pc->connection->ssl->connection); | |
| 751 | |
| 752 if (ssl_session == NULL) { | |
| 753 return; | |
| 754 } | |
| 755 | |
| 756 ngx_log_debug1(NGX_LOG_DEBUG_STREAM, pc->log, 0, | |
| 757 "save session: %p", ssl_session); | |
| 758 | |
| 759 len = i2d_SSL_SESSION(ssl_session, NULL); | |
| 760 | |
| 761 /* do not cache too big session */ | |
| 762 | |
| 763 if (len > NGX_SSL_MAX_SESSION_SIZE) { | |
| 764 return; | |
| 765 } | |
| 766 | |
| 767 p = buf; | |
| 768 (void) i2d_SSL_SESSION(ssl_session, &p); | |
| 769 | |
| 770 peer = rrp->current; | |
| 771 | |
| 772 ngx_stream_upstream_rr_peers_rlock(peers); | |
| 773 ngx_stream_upstream_rr_peer_lock(peers, peer); | |
| 774 | |
| 775 if (len > peer->ssl_session_len) { | |
| 776 ngx_shmtx_lock(&peers->shpool->mutex); | |
| 777 | |
| 778 if (peer->ssl_session) { | |
| 779 ngx_slab_free_locked(peers->shpool, peer->ssl_session); | |
| 780 } | |
| 781 | |
| 782 peer->ssl_session = ngx_slab_alloc_locked(peers->shpool, len); | |
| 783 | |
| 784 ngx_shmtx_unlock(&peers->shpool->mutex); | |
| 785 | |
| 786 if (peer->ssl_session == NULL) { | |
| 787 peer->ssl_session_len = 0; | |
| 788 | |
| 789 ngx_stream_upstream_rr_peer_unlock(peers, peer); | |
| 790 ngx_stream_upstream_rr_peers_unlock(peers); | |
| 791 return; | |
| 792 } | |
| 793 | |
| 794 peer->ssl_session_len = len; | |
| 795 } | |
| 796 | |
| 797 ngx_memcpy(peer->ssl_session, buf, len); | |
| 798 | |
| 799 ngx_stream_upstream_rr_peer_unlock(peers, peer); | |
| 800 ngx_stream_upstream_rr_peers_unlock(peers); | |
| 801 | |
| 802 return; | |
| 803 } | |
| 804 #endif | |
| 805 | |
| 806 ssl_session = ngx_ssl_get_session(pc->connection); | |
| 807 | |
| 808 if (ssl_session == NULL) { | |
| 809 return; | |
| 810 } | |
| 811 | |
| 812 ngx_log_debug1(NGX_LOG_DEBUG_STREAM, pc->log, 0, | |
| 813 "save session: %p", ssl_session); | |
| 814 | |
| 815 peer = rrp->current; | |
| 816 | |
| 817 old_ssl_session = peer->ssl_session; | |
| 818 peer->ssl_session = ssl_session; | |
| 819 | |
| 820 if (old_ssl_session) { | |
| 821 | |
| 822 ngx_log_debug1(NGX_LOG_DEBUG_STREAM, pc->log, 0, | |
| 823 "old session: %p", old_ssl_session); | |
| 824 | |
| 825 /* TODO: may block */ | |
| 826 | |
| 827 ngx_ssl_free_session(old_ssl_session); | |
| 828 } | |
| 829 } | |
| 830 | |
|
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831 |
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832 static ngx_int_t |
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833 ngx_stream_upstream_empty_set_session(ngx_peer_connection_t *pc, void *data) |
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834 { |
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835 return NGX_OK; |
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836 } |
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837 |
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838 |
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839 static void |
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840 ngx_stream_upstream_empty_save_session(ngx_peer_connection_t *pc, void *data) |
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841 { |
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842 return; |
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843 } |
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844 |
| 6115 | 845 #endif |