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/*
* Copyright (C) Igor Sysoev
* Copyright (C) Nginx, Inc.
*/
#ifndef _NGX_HTTP_UPSTREAM_ROUND_ROBIN_H_INCLUDED_
#define _NGX_HTTP_UPSTREAM_ROUND_ROBIN_H_INCLUDED_
#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_http.h>
typedef struct ngx_http_upstream_rr_peer_s ngx_http_upstream_rr_peer_t;
struct ngx_http_upstream_rr_peer_s {
struct sockaddr *sockaddr;
socklen_t socklen;
ngx_str_t name;
ngx_str_t server;
ngx_int_t current_weight;
ngx_int_t effective_weight;
ngx_int_t weight;
ngx_uint_t conns;
ngx_uint_t max_conns;
ngx_uint_t fails;
time_t accessed;
time_t checked;
ngx_uint_t max_fails;
time_t fail_timeout;
ngx_msec_t slow_start;
ngx_msec_t start_time;
ngx_uint_t down;
#if (NGX_HTTP_SSL || NGX_COMPAT)
void *ssl_session;
int ssl_session_len;
#endif
#if (NGX_HTTP_UPSTREAM_ZONE)
ngx_atomic_t lock;
#endif
ngx_http_upstream_rr_peer_t *next;
NGX_COMPAT_BEGIN(32)
NGX_COMPAT_END
};
typedef struct ngx_http_upstream_rr_peers_s ngx_http_upstream_rr_peers_t;
struct ngx_http_upstream_rr_peers_s {
ngx_uint_t number;
#if (NGX_HTTP_UPSTREAM_ZONE)
ngx_slab_pool_t *shpool;
ngx_atomic_t rwlock;
ngx_http_upstream_rr_peers_t *zone_next;
#endif
ngx_uint_t total_weight;
unsigned single:1;
unsigned weighted:1;
ngx_str_t *name;
ngx_http_upstream_rr_peers_t *next;
ngx_http_upstream_rr_peer_t *peer;
};
#if (NGX_HTTP_UPSTREAM_ZONE)
#define ngx_http_upstream_rr_peers_rlock(peers) \
\
if (peers->shpool) { \
ngx_rwlock_rlock(&peers->rwlock); \
}
#define ngx_http_upstream_rr_peers_wlock(peers) \
\
if (peers->shpool) { \
ngx_rwlock_wlock(&peers->rwlock); \
}
#define ngx_http_upstream_rr_peers_unlock(peers) \
\
if (peers->shpool) { \
ngx_rwlock_unlock(&peers->rwlock); \
}
#define ngx_http_upstream_rr_peer_lock(peers, peer) \
\
if (peers->shpool) { \
ngx_rwlock_wlock(&peer->lock); \
}
#define ngx_http_upstream_rr_peer_unlock(peers, peer) \
\
if (peers->shpool) { \
ngx_rwlock_unlock(&peer->lock); \
}
#else
#define ngx_http_upstream_rr_peers_rlock(peers)
#define ngx_http_upstream_rr_peers_wlock(peers)
#define ngx_http_upstream_rr_peers_unlock(peers)
#define ngx_http_upstream_rr_peer_lock(peers, peer)
#define ngx_http_upstream_rr_peer_unlock(peers, peer)
#endif
typedef struct {
ngx_uint_t config;
ngx_http_upstream_rr_peers_t *peers;
ngx_http_upstream_rr_peer_t *current;
uintptr_t *tried;
uintptr_t data;
} ngx_http_upstream_rr_peer_data_t;
ngx_int_t ngx_http_upstream_init_round_robin(ngx_conf_t *cf,
ngx_http_upstream_srv_conf_t *us);
ngx_int_t ngx_http_upstream_init_round_robin_peer(ngx_http_request_t *r,
ngx_http_upstream_srv_conf_t *us);
ngx_int_t ngx_http_upstream_create_round_robin_peer(ngx_http_request_t *r,
ngx_http_upstream_resolved_t *ur);
ngx_int_t ngx_http_upstream_get_round_robin_peer(ngx_peer_connection_t *pc,
void *data);
void ngx_http_upstream_free_round_robin_peer(ngx_peer_connection_t *pc,
void *data, ngx_uint_t state);
#if (NGX_HTTP_SSL)
ngx_int_t
ngx_http_upstream_set_round_robin_peer_session(ngx_peer_connection_t *pc,
void *data);
void ngx_http_upstream_save_round_robin_peer_session(ngx_peer_connection_t *pc,
void *data);
#endif
#endif /* _NGX_HTTP_UPSTREAM_ROUND_ROBIN_H_INCLUDED_ */
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