root/net/tipc/zone.c

DEFINITIONS

1. tipc_zone_create
2. tipc_zone_delete
3. tipc_zone_attach_cluster
4. tipc_zone_remove_as_router
5. tipc_zone_send_external_routes
6. tipc_zone_select_remote_node
7. tipc_zone_select_router
8. tipc_zone_next_node

/*
 * net/tipc/zone.c: TIPC zone management routines
 *
 * Copyright (c) 2000-2006, Ericsson AB
 * Copyright (c) 2005, Wind River Systems
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the names of the copyright holders nor the names of its
 *    contributors may be used to endorse or promote products derived from
 *    this software without specific prior written permission.
 *
 * Alternatively, this software may be distributed under the terms of the
 * GNU General Public License ("GPL") version 2 as published by the Free
 * Software Foundation.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include "core.h"
#include "zone.h"
#include "net.h"
#include "addr.h"
#include "node_subscr.h"
#include "cluster.h"
#include "node.h"

struct _zone *tipc_zone_create(u32 addr)
{
        struct _zone *z_ptr;
        u32 z_num;

        if (!tipc_addr_domain_valid(addr)) {
                err("Zone creation failed, invalid domain 0x%x\n", addr);
                return NULL;
        }

        z_ptr = kzalloc(sizeof(*z_ptr), GFP_ATOMIC);
        if (!z_ptr) {
                warn("Zone creation failed, insufficient memory\n");
                return NULL;
        }

        z_num = tipc_zone(addr);
        z_ptr->addr = tipc_addr(z_num, 0, 0);
        tipc_net.zones[z_num] = z_ptr;
        return z_ptr;
}

void tipc_zone_delete(struct _zone *z_ptr)
{
        u32 c_num;

        if (!z_ptr)
                return;
        for (c_num = 1; c_num <= tipc_max_clusters; c_num++) {
                tipc_cltr_delete(z_ptr->clusters[c_num]);
        }
        kfree(z_ptr);
}

void tipc_zone_attach_cluster(struct _zone *z_ptr, struct cluster *c_ptr)
{
        u32 c_num = tipc_cluster(c_ptr->addr);

        assert(c_ptr->addr);
        assert(c_num <= tipc_max_clusters);
        assert(z_ptr->clusters[c_num] == NULL);
        z_ptr->clusters[c_num] = c_ptr;
}

void tipc_zone_remove_as_router(struct _zone *z_ptr, u32 router)
{
        u32 c_num;

        for (c_num = 1; c_num <= tipc_max_clusters; c_num++) {
                if (z_ptr->clusters[c_num]) {
                        tipc_cltr_remove_as_router(z_ptr->clusters[c_num],
                                                   router);
                }
        }
}

void tipc_zone_send_external_routes(struct _zone *z_ptr, u32 dest)
{
        u32 c_num;

        for (c_num = 1; c_num <= tipc_max_clusters; c_num++) {
                if (z_ptr->clusters[c_num]) {
                        if (in_own_cluster(z_ptr->addr))
                                continue;
                        tipc_cltr_send_ext_routes(z_ptr->clusters[c_num], dest);
                }
        }
}

struct tipc_node *tipc_zone_select_remote_node(struct _zone *z_ptr, u32 addr, u32 ref)
{
        struct cluster *c_ptr;
        struct tipc_node *n_ptr;
        u32 c_num;

        if (!z_ptr)
                return NULL;
        c_ptr = z_ptr->clusters[tipc_cluster(addr)];
        if (!c_ptr)
                return NULL;
        n_ptr = tipc_cltr_select_node(c_ptr, ref);
        if (n_ptr)
                return n_ptr;

        /* Links to any other clusters within this zone ? */
        for (c_num = 1; c_num <= tipc_max_clusters; c_num++) {
                c_ptr = z_ptr->clusters[c_num];
                if (!c_ptr)
                        return NULL;
                n_ptr = tipc_cltr_select_node(c_ptr, ref);
                if (n_ptr)
                        return n_ptr;
        }
        return NULL;
}

u32 tipc_zone_select_router(struct _zone *z_ptr, u32 addr, u32 ref)
{
        struct cluster *c_ptr;
        u32 c_num;
        u32 router;

        if (!z_ptr)
                return 0;
        c_ptr = z_ptr->clusters[tipc_cluster(addr)];
        router = c_ptr ? tipc_cltr_select_router(c_ptr, ref) : 0;
        if (router)
                return router;

        /* Links to any other clusters within the zone? */
        for (c_num = 1; c_num <= tipc_max_clusters; c_num++) {
                c_ptr = z_ptr->clusters[c_num];
                router = c_ptr ? tipc_cltr_select_router(c_ptr, ref) : 0;
                if (router)
                        return router;
        }
        return 0;
}


u32 tipc_zone_next_node(u32 addr)
{
        struct cluster *c_ptr = tipc_cltr_find(addr);

        if (c_ptr)
                return tipc_cltr_next_node(c_ptr, addr);
        return 0;
}