/* * 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] == 0);	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 node *tipc_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 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;}