haproxy/include/proto/backend.h

/*
  include/proto/backend.h
  Functions prototypes for the backend.

  Copyright (C) 2000-2009 Willy Tarreau - w@1wt.eu
  
  This library is free software; you can redistribute it and/or
  modify it under the terms of the GNU Lesser General Public
  License as published by the Free Software Foundation, version 2.1
  exclusively.

  This library is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General Public
  License along with this library; if not, write to the Free Software
  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
*/

#ifndef _PROTO_BACKEND_H
#define _PROTO_BACKEND_H

#include <common/config.h>

#include <types/backend.h>
#include <types/proxy.h>
#include <types/server.h>
#include <types/session.h>

int assign_server(struct session *s);
int assign_server_address(struct session *s);
int assign_server_and_queue(struct session *s);
int connect_server(struct session *s);
int srv_redispatch_connect(struct session *t);
const char *backend_lb_algo_str(int algo);
int backend_parse_balance(const char **args, char *err,
			  int errlen, struct proxy *curproxy);

int be_downtime(struct proxy *px);
void recount_servers(struct proxy *px);
void update_backend_weight(struct proxy *px);
struct server *get_server_sh(struct proxy *px, const char *addr, int len);
struct server *get_server_uh(struct proxy *px, char *uri, int uri_len);

/* This function returns non-zero if a server with the given weight and state
 * is usable for LB, otherwise zero.
 */
static inline int srv_is_usable(int state, int weight)
{
	if (!weight)
		return 0;
	if (state & SRV_GOINGDOWN)
		return 0;
	if (!(state & SRV_RUNNING))
		return 0;
	return 1;
}

#endif /* _PROTO_BACKEND_H */

/*
 * Local variables:
 *  c-indent-level: 8
 *  c-basic-offset: 8
 * End:
 */