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Willy Tarreaubaaee002006-06-26 02:48:02 +02001/*
Willy Tarreau62c3be22012-01-20 13:12:32 +01002 * include/proto/backend.h
3 * Functions prototypes for the backend.
4 *
5 * Copyright (C) 2000-2012 Willy Tarreau - w@1wt.eu
6 *
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation, version 2.1
10 * exclusively.
11 *
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
Willy Tarreaubaaee002006-06-26 02:48:02 +020021
22#ifndef _PROTO_BACKEND_H
23#define _PROTO_BACKEND_H
24
Willy Tarreaue3ba5f02006-06-29 18:54:54 +020025#include <common/config.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020026
27#include <types/backend.h>
Willy Tarreauf89c1872009-10-01 11:19:37 +020028#include <types/proxy.h>
29#include <types/server.h>
Willy Tarreaubaaee002006-06-26 02:48:02 +020030#include <types/session.h>
31
Willy Tarreaubaaee002006-06-26 02:48:02 +020032int assign_server(struct session *s);
33int assign_server_address(struct session *s);
34int assign_server_and_queue(struct session *s);
35int connect_server(struct session *s);
Willy Tarreaubaaee002006-06-26 02:48:02 +020036int srv_redispatch_connect(struct session *t);
Krzysztof Piotr Oledzki15514c22010-01-04 16:03:09 +010037const char *backend_lb_algo_str(int algo);
Willy Tarreaua0cbda62007-11-01 21:39:54 +010038int backend_parse_balance(const char **args, char *err,
39 int errlen, struct proxy *curproxy);
Willy Tarreaubaaee002006-06-26 02:48:02 +020040
Krzysztof Oledzki85130942007-10-22 16:21:10 +020041int be_downtime(struct proxy *px);
Willy Tarreauc5d9c802009-10-01 09:17:05 +020042void recount_servers(struct proxy *px);
43void update_backend_weight(struct proxy *px);
Willy Tarreauca7d4b92009-10-01 09:21:55 +020044struct server *get_server_sh(struct proxy *px, const char *addr, int len);
45struct server *get_server_uh(struct proxy *px, char *uri, int uri_len);
Willy Tarreauc5d9c802009-10-01 09:17:05 +020046
47/* This function returns non-zero if a server with the given weight and state
48 * is usable for LB, otherwise zero.
49 */
50static inline int srv_is_usable(int state, int weight)
51{
52 if (!weight)
53 return 0;
Willy Tarreau62c3be22012-01-20 13:12:32 +010054 if (state & (SRV_GOINGDOWN | SRV_MAINTAIN))
Willy Tarreauc5d9c802009-10-01 09:17:05 +020055 return 0;
56 if (!(state & SRV_RUNNING))
57 return 0;
58 return 1;
59}
Willy Tarreaubaaee002006-06-26 02:48:02 +020060
Willy Tarreaubaaee002006-06-26 02:48:02 +020061#endif /* _PROTO_BACKEND_H */
62
63/*
64 * Local variables:
65 * c-indent-level: 8
66 * c-basic-offset: 8
67 * End:
68 */