inet/ilb/ilb_alg_rr.c

dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra/*
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra * CDDL HEADER START
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra *
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra * The contents of this file are subject to the terms of the
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra * Common Development and Distribution License (the "License").
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra * You may not use this file except in compliance with the License.
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra *
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra * or http://www.opensolaris.org/os/licensing.
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra * See the License for the specific language governing permissions
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra * and limitations under the License.
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra *
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra * When distributing Covered Code, include this CDDL HEADER in each
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra * If applicable, add the following below this CDDL HEADER, with the
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra * fields enclosed by brackets "[]" replaced with your own identifying
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra * information: Portions Copyright [yyyy] [name of copyright owner]
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra *
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra * CDDL HEADER END
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra */
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra/*
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra * Use is subject to license terms.
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra */
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra#include <sys/errno.h>
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra#include <sys/sysmacros.h>
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra#include <sys/list.h>
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra#include <net/if.h>
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra#include <netinet/in.h>
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra#include <inet/ilb.h>
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra#include "ilb_impl.h"
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra#include "ilb_alg.h"
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misratypedef struct {
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    ilb_server_t    *server;
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    boolean_t   enabled;
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    list_node_t list;
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra} rr_server_t;
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misratypedef struct rr_s {
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    kmutex_t    rr_lock;
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    list_t      rr_servers;
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    rr_server_t *rr_next;
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra} rr_t;
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misrastatic void rr_fini(ilb_alg_data_t **);
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra/* ARGSUSED */
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misrastatic boolean_t
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misrarr_lb(in6_addr_t *saddr, in_port_t sport, in6_addr_t *daddr,
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    in_port_t dport, void *alg_data, ilb_server_t **ret_server)
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra{
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    rr_t *rr_alg = (rr_t *)alg_data;
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    list_t *servers;
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    rr_server_t *start;
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    ASSERT(ret_server != NULL);
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    *ret_server = NULL;
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    mutex_enter(&rr_alg->rr_lock);
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    servers = &rr_alg->rr_servers;
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    if (list_is_empty(servers)) {
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra        mutex_exit(&rr_alg->rr_lock);
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra        return (B_FALSE);
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    }
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    if (rr_alg->rr_next == NULL)
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra        rr_alg->rr_next = list_head(servers);
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    start = rr_alg->rr_next;
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    while (!rr_alg->rr_next->enabled) {
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra        rr_alg->rr_next = list_next(servers, rr_alg->rr_next);
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra        if (rr_alg->rr_next == NULL)
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra            rr_alg->rr_next = list_head(servers);
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra        if (rr_alg->rr_next == start) {
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra            mutex_exit(&rr_alg->rr_lock);
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra            return (B_FALSE);
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra        }
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    }
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    *ret_server = rr_alg->rr_next->server;
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    rr_alg->rr_next = list_next(servers, rr_alg->rr_next);
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    mutex_exit(&rr_alg->rr_lock);
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    return (B_TRUE);
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra}
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misrastatic int
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misrarr_server_del(ilb_server_t *host, void *alg_data)
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra{
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    rr_t *rr_alg = (rr_t *)alg_data;
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    list_t *servers = &rr_alg->rr_servers;
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    rr_server_t *tmp_server;
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    mutex_enter(&rr_alg->rr_lock);
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    for (tmp_server = list_head(servers); tmp_server != NULL;
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra        tmp_server = list_next(servers, tmp_server)) {
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra        if (tmp_server->server == host) {
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra            if (rr_alg->rr_next == tmp_server) {
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra                rr_alg->rr_next = list_next(servers,
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra                    tmp_server);
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra            }
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra            list_remove(servers, tmp_server);
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra            break;
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra        }
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    }
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    mutex_exit(&rr_alg->rr_lock);
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    if (tmp_server == NULL)
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra        return (EINVAL);
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    kmem_free(tmp_server, sizeof (rr_server_t));
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    ILB_SERVER_REFRELE(host);
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    return (0);
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra}
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misrastatic int
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misrarr_server_add(ilb_server_t *host, void *alg_data)
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra{
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    rr_t *rr_alg = (rr_t *)alg_data;
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    rr_server_t *new_server;
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    new_server = kmem_alloc(sizeof (rr_server_t), KM_NOSLEEP);
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    if (new_server == NULL)
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra        return (ENOMEM);
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    new_server->server = host;
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    new_server->enabled = host->iser_enabled;
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    mutex_enter(&rr_alg->rr_lock);
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    list_insert_head(&rr_alg->rr_servers, new_server);
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    mutex_exit(&rr_alg->rr_lock);
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    ILB_SERVER_REFHOLD(host);
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    return (0);
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra}
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misrastatic int
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misrarr_server_toggle(list_t *servers, ilb_server_t *host, boolean_t value)
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra{
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    rr_server_t *tmp_server;
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    if (list_is_empty(servers))
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra        return (EINVAL);
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    for (tmp_server = list_head(servers); tmp_server != NULL;
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra        tmp_server = list_next(servers, tmp_server)) {
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra        if (tmp_server->server == host) {
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra            tmp_server->enabled = value;
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra            break;
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra        }
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    }
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    if (tmp_server != NULL)
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra        return (0);
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    else
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra        return (EINVAL);
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra}
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misrastatic int
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misrarr_server_enable(ilb_server_t *host, void *alg_data)
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra{
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    rr_t *rr_alg = (rr_t *)alg_data;
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    list_t *servers;
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    int ret;
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    mutex_enter(&rr_alg->rr_lock);
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    servers = &rr_alg->rr_servers;
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    ret = rr_server_toggle(servers, host, B_TRUE);
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    mutex_exit(&rr_alg->rr_lock);
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    return (ret);
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra}
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misrastatic int
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misrarr_server_disable(ilb_server_t *host, void *alg_data)
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra{
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    rr_t *rr_alg = (rr_t *)alg_data;
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    list_t *servers;
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    int ret;
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    mutex_enter(&rr_alg->rr_lock);
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    servers = &rr_alg->rr_servers;
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    ret = rr_server_toggle(servers, host, B_FALSE);
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    mutex_exit(&rr_alg->rr_lock);
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    return (ret);
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra}
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra/* ARGSUSED */
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misrailb_alg_data_t *
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misrailb_alg_rr_init(ilb_rule_t *rule, void *arg)
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra{
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    ilb_alg_data_t  *alg;
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    rr_t        *rr_alg;
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    if ((alg = kmem_alloc(sizeof (ilb_alg_data_t), KM_NOSLEEP)) == NULL)
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra        return (NULL);
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    if ((rr_alg = kmem_alloc(sizeof (rr_t), KM_NOSLEEP)) == NULL) {
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra        kmem_free(alg, sizeof (ilb_alg_data_t));
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra        return (NULL);
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    }
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    alg->ilb_alg_lb = rr_lb;
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    alg->ilb_alg_server_del = rr_server_del;
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    alg->ilb_alg_server_add = rr_server_add;
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    alg->ilb_alg_server_enable = rr_server_enable;
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    alg->ilb_alg_server_disable = rr_server_disable;
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    alg->ilb_alg_fini = rr_fini;
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    alg->ilb_alg_data = rr_alg;
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    mutex_init(&rr_alg->rr_lock, NULL, MUTEX_DEFAULT, NULL);
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    list_create(&rr_alg->rr_servers, sizeof (rr_server_t),
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra        offsetof(rr_server_t, list));
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    rr_alg->rr_next = NULL;
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    return (alg);
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra}
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misrastatic void
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misrarr_fini(ilb_alg_data_t **alg)
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra{
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    rr_t        *rr_alg;
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    rr_server_t *tmp_server;
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    list_t      *servers;
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    rr_alg = (*alg)->ilb_alg_data;
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    servers = &rr_alg->rr_servers;
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    while ((tmp_server = list_head(servers)) != NULL) {
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra        list_remove(servers, tmp_server);
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra        ILB_SERVER_REFRELE(tmp_server->server);
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra        kmem_free(tmp_server, sizeof (rr_server_t));
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    }
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    list_destroy(servers);
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    kmem_free(rr_alg, sizeof (rr_t));
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    kmem_free(*alg, sizeof (ilb_alg_data_t));
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra    *alg = NULL;
dbed73cbda2229fd1aa6dc5743993cae7f0a7ee9Sangeeta Misra}