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/*
* net/tipc/zone.c: TIPC zone management routines
*
* Copyright (c) 2003-2006, 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 *zone_create(u32 addr)
{
struct _zone *z_ptr = 0;
u32 z_num;
if (!addr_domain_valid(addr))
return 0;
z_ptr = (struct _zone *)kmalloc(sizeof(*z_ptr), GFP_ATOMIC);
if (z_ptr != NULL) {
memset(z_ptr, 0, sizeof(*z_ptr));
z_num = tipc_zone(addr);
z_ptr->addr = tipc_addr(z_num, 0, 0);
net.zones[z_num] = z_ptr;
}
return z_ptr;
}
void zone_delete(struct _zone *z_ptr)
{
u32 c_num;
if (!z_ptr)
return;
for (c_num = 1; c_num <= tipc_max_clusters; c_num++) {
cluster_delete(z_ptr->clusters[c_num]);
}
kfree(z_ptr);
}
void 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] == 0);
z_ptr->clusters[c_num] = c_ptr;
}
void 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]) {
cluster_remove_as_router(z_ptr->clusters[c_num],
router);
}
}
}
void 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;
cluster_send_ext_routes(z_ptr->clusters[c_num], dest);
}
}
}
struct node *zone_select_remote_node(struct _zone *z_ptr, u32 addr, u32 ref)
{
struct cluster *c_ptr;
struct node *n_ptr;
u32 c_num;
if (!z_ptr)
return 0;
c_ptr = z_ptr->clusters[tipc_cluster(addr)];
if (!c_ptr)
return 0;
n_ptr = cluster_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 0;
n_ptr = cluster_select_node(c_ptr, ref);
if (n_ptr)
return n_ptr;
}
return 0;
}
u32 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 ? cluster_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 ? cluster_select_router(c_ptr, ref) : 0;
if (router)
return router;
}
return 0;
}
u32 zone_next_node(u32 addr)
{
struct cluster *c_ptr = cluster_find(addr);
if (c_ptr)
return cluster_next_node(c_ptr, addr);
return 0;
}
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