diff options
Diffstat (limited to 'app/nginx/src/http/modules/ngx_http_upstream_ip_hash_module.c')
| -rw-r--r-- | app/nginx/src/http/modules/ngx_http_upstream_ip_hash_module.c | 272 |
1 files changed, 0 insertions, 272 deletions
diff --git a/app/nginx/src/http/modules/ngx_http_upstream_ip_hash_module.c b/app/nginx/src/http/modules/ngx_http_upstream_ip_hash_module.c deleted file mode 100644 index 296108f..0000000 --- a/app/nginx/src/http/modules/ngx_http_upstream_ip_hash_module.c +++ /dev/null @@ -1,272 +0,0 @@ - -/* - * Copyright (C) Igor Sysoev - * Copyright (C) Nginx, Inc. - */ - - -#include <ngx_config.h> -#include <ngx_core.h> -#include <ngx_http.h> - - -typedef struct { - /* the round robin data must be first */ - ngx_http_upstream_rr_peer_data_t rrp; - - ngx_uint_t hash; - - u_char addrlen; - u_char *addr; - - u_char tries; - - ngx_event_get_peer_pt get_rr_peer; -} ngx_http_upstream_ip_hash_peer_data_t; - - -static ngx_int_t ngx_http_upstream_init_ip_hash_peer(ngx_http_request_t *r, - ngx_http_upstream_srv_conf_t *us); -static ngx_int_t ngx_http_upstream_get_ip_hash_peer(ngx_peer_connection_t *pc, - void *data); -static char *ngx_http_upstream_ip_hash(ngx_conf_t *cf, ngx_command_t *cmd, - void *conf); - - -static ngx_command_t ngx_http_upstream_ip_hash_commands[] = { - - { ngx_string("ip_hash"), - NGX_HTTP_UPS_CONF|NGX_CONF_NOARGS, - ngx_http_upstream_ip_hash, - 0, - 0, - NULL }, - - ngx_null_command -}; - - -static ngx_http_module_t ngx_http_upstream_ip_hash_module_ctx = { - NULL, /* preconfiguration */ - NULL, /* postconfiguration */ - - NULL, /* create main configuration */ - NULL, /* init main configuration */ - - NULL, /* create server configuration */ - NULL, /* merge server configuration */ - - NULL, /* create location configuration */ - NULL /* merge location configuration */ -}; - - -ngx_module_t ngx_http_upstream_ip_hash_module = { - NGX_MODULE_V1, - &ngx_http_upstream_ip_hash_module_ctx, /* module context */ - ngx_http_upstream_ip_hash_commands, /* module directives */ - NGX_HTTP_MODULE, /* module type */ - NULL, /* init master */ - NULL, /* init module */ - NULL, /* init process */ - NULL, /* init thread */ - NULL, /* exit thread */ - NULL, /* exit process */ - NULL, /* exit master */ - NGX_MODULE_V1_PADDING -}; - - -static u_char ngx_http_upstream_ip_hash_pseudo_addr[3]; - - -static ngx_int_t -ngx_http_upstream_init_ip_hash(ngx_conf_t *cf, ngx_http_upstream_srv_conf_t *us) -{ - if (ngx_http_upstream_init_round_robin(cf, us) != NGX_OK) { - return NGX_ERROR; - } - - us->peer.init = ngx_http_upstream_init_ip_hash_peer; - - return NGX_OK; -} - - -static ngx_int_t -ngx_http_upstream_init_ip_hash_peer(ngx_http_request_t *r, - ngx_http_upstream_srv_conf_t *us) -{ - struct sockaddr_in *sin; -#if (NGX_HAVE_INET6) - struct sockaddr_in6 *sin6; -#endif - ngx_http_upstream_ip_hash_peer_data_t *iphp; - - iphp = ngx_palloc(r->pool, sizeof(ngx_http_upstream_ip_hash_peer_data_t)); - if (iphp == NULL) { - return NGX_ERROR; - } - - r->upstream->peer.data = &iphp->rrp; - - if (ngx_http_upstream_init_round_robin_peer(r, us) != NGX_OK) { - return NGX_ERROR; - } - - r->upstream->peer.get = ngx_http_upstream_get_ip_hash_peer; - - switch (r->connection->sockaddr->sa_family) { - - case AF_INET: - sin = (struct sockaddr_in *) r->connection->sockaddr; - iphp->addr = (u_char *) &sin->sin_addr.s_addr; - iphp->addrlen = 3; - break; - -#if (NGX_HAVE_INET6) - case AF_INET6: - sin6 = (struct sockaddr_in6 *) r->connection->sockaddr; - iphp->addr = (u_char *) &sin6->sin6_addr.s6_addr; - iphp->addrlen = 16; - break; -#endif - - default: - iphp->addr = ngx_http_upstream_ip_hash_pseudo_addr; - iphp->addrlen = 3; - } - - iphp->hash = 89; - iphp->tries = 0; - iphp->get_rr_peer = ngx_http_upstream_get_round_robin_peer; - - return NGX_OK; -} - - -static ngx_int_t -ngx_http_upstream_get_ip_hash_peer(ngx_peer_connection_t *pc, void *data) -{ - ngx_http_upstream_ip_hash_peer_data_t *iphp = data; - - time_t now; - ngx_int_t w; - uintptr_t m; - ngx_uint_t i, n, p, hash; - ngx_http_upstream_rr_peer_t *peer; - - ngx_log_debug1(NGX_LOG_DEBUG_HTTP, pc->log, 0, - "get ip hash peer, try: %ui", pc->tries); - - /* TODO: cached */ - - ngx_http_upstream_rr_peers_wlock(iphp->rrp.peers); - - if (iphp->tries > 20 || iphp->rrp.peers->single) { - ngx_http_upstream_rr_peers_unlock(iphp->rrp.peers); - return iphp->get_rr_peer(pc, &iphp->rrp); - } - - now = ngx_time(); - - pc->cached = 0; - pc->connection = NULL; - - hash = iphp->hash; - - for ( ;; ) { - - for (i = 0; i < (ngx_uint_t) iphp->addrlen; i++) { - hash = (hash * 113 + iphp->addr[i]) % 6271; - } - - w = hash % iphp->rrp.peers->total_weight; - peer = iphp->rrp.peers->peer; - p = 0; - - while (w >= peer->weight) { - w -= peer->weight; - peer = peer->next; - p++; - } - - n = p / (8 * sizeof(uintptr_t)); - m = (uintptr_t) 1 << p % (8 * sizeof(uintptr_t)); - - if (iphp->rrp.tried[n] & m) { - goto next; - } - - ngx_log_debug2(NGX_LOG_DEBUG_HTTP, pc->log, 0, - "get ip hash peer, hash: %ui %04XL", p, (uint64_t) m); - - if (peer->down) { - goto next; - } - - if (peer->max_fails - && peer->fails >= peer->max_fails - && now - peer->checked <= peer->fail_timeout) - { - goto next; - } - - if (peer->max_conns && peer->conns >= peer->max_conns) { - goto next; - } - - break; - - next: - - if (++iphp->tries > 20) { - ngx_http_upstream_rr_peers_unlock(iphp->rrp.peers); - return iphp->get_rr_peer(pc, &iphp->rrp); - } - } - - iphp->rrp.current = peer; - - pc->sockaddr = peer->sockaddr; - pc->socklen = peer->socklen; - pc->name = &peer->name; - - peer->conns++; - - if (now - peer->checked > peer->fail_timeout) { - peer->checked = now; - } - - ngx_http_upstream_rr_peers_unlock(iphp->rrp.peers); - - iphp->rrp.tried[n] |= m; - iphp->hash = hash; - - return NGX_OK; -} - - -static char * -ngx_http_upstream_ip_hash(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) -{ - ngx_http_upstream_srv_conf_t *uscf; - - uscf = ngx_http_conf_get_module_srv_conf(cf, ngx_http_upstream_module); - - if (uscf->peer.init_upstream) { - ngx_conf_log_error(NGX_LOG_WARN, cf, 0, - "load balancing method redefined"); - } - - uscf->peer.init_upstream = ngx_http_upstream_init_ip_hash; - - uscf->flags = NGX_HTTP_UPSTREAM_CREATE - |NGX_HTTP_UPSTREAM_WEIGHT - |NGX_HTTP_UPSTREAM_MAX_CONNS - |NGX_HTTP_UPSTREAM_MAX_FAILS - |NGX_HTTP_UPSTREAM_FAIL_TIMEOUT - |NGX_HTTP_UPSTREAM_DOWN; - - return NGX_CONF_OK; -} |