1/* 2 * net/tipc/zone.c: TIPC zone management routines 3 * 4 * Copyright (c) 2000-2006, Ericsson AB 5 * Copyright (c) 2005, Wind River Systems 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions are met: 10 * 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the names of the copyright holders nor the names of its 17 * contributors may be used to endorse or promote products derived from 18 * this software without specific prior written permission. 19 * 20 * Alternatively, this software may be distributed under the terms of the 21 * GNU General Public License ("GPL") version 2 as published by the Free 22 * Software Foundation. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 25 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 28 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 29 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 30 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 31 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 32 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 33 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 34 * POSSIBILITY OF SUCH DAMAGE. 35 */ 36 37#include "core.h" 38#include "zone.h" 39#include "net.h" 40#include "addr.h" 41#include "node_subscr.h" 42#include "cluster.h" 43#include "node.h" 44 45struct _zone *tipc_zone_create(u32 addr) 46{ 47 struct _zone *z_ptr; 48 u32 z_num; 49 50 if (!tipc_addr_domain_valid(addr)) { 51 err("Zone creation failed, invalid domain 0x%x\n", addr); 52 return NULL; 53 } 54 55 z_ptr = kzalloc(sizeof(*z_ptr), GFP_ATOMIC); 56 if (!z_ptr) { 57 warn("Zone creation failed, insufficient memory\n"); 58 return NULL; 59 } 60 61 z_num = tipc_zone(addr); 62 z_ptr->addr = tipc_addr(z_num, 0, 0); 63 tipc_net.zones[z_num] = z_ptr; 64 return z_ptr; 65} 66 67void tipc_zone_delete(struct _zone *z_ptr) 68{ 69 u32 c_num; 70 71 if (!z_ptr) 72 return; 73 for (c_num = 1; c_num <= tipc_max_clusters; c_num++) { 74 tipc_cltr_delete(z_ptr->clusters[c_num]); 75 } 76 kfree(z_ptr); 77} 78 79void tipc_zone_attach_cluster(struct _zone *z_ptr, struct cluster *c_ptr) 80{ 81 u32 c_num = tipc_cluster(c_ptr->addr); 82 83 assert(c_ptr->addr); 84 assert(c_num <= tipc_max_clusters); 85 assert(z_ptr->clusters[c_num] == NULL); 86 z_ptr->clusters[c_num] = c_ptr; 87} 88 89void tipc_zone_remove_as_router(struct _zone *z_ptr, u32 router) 90{ 91 u32 c_num; 92 93 for (c_num = 1; c_num <= tipc_max_clusters; c_num++) { 94 if (z_ptr->clusters[c_num]) { 95 tipc_cltr_remove_as_router(z_ptr->clusters[c_num], 96 router); 97 } 98 } 99} 100 101void tipc_zone_send_external_routes(struct _zone *z_ptr, u32 dest) 102{ 103 u32 c_num; 104 105 for (c_num = 1; c_num <= tipc_max_clusters; c_num++) { 106 if (z_ptr->clusters[c_num]) { 107 if (in_own_cluster(z_ptr->addr)) 108 continue; 109 tipc_cltr_send_ext_routes(z_ptr->clusters[c_num], dest); 110 } 111 } 112} 113 114struct tipc_node *tipc_zone_select_remote_node(struct _zone *z_ptr, u32 addr, u32 ref) 115{ 116 struct cluster *c_ptr; 117 struct tipc_node *n_ptr; 118 u32 c_num; 119 120 if (!z_ptr) 121 return NULL; 122 c_ptr = z_ptr->clusters[tipc_cluster(addr)]; 123 if (!c_ptr) 124 return NULL; 125 n_ptr = tipc_cltr_select_node(c_ptr, ref); 126 if (n_ptr) 127 return n_ptr; 128 129 /* Links to any other clusters within this zone ? */ 130 for (c_num = 1; c_num <= tipc_max_clusters; c_num++) { 131 c_ptr = z_ptr->clusters[c_num]; 132 if (!c_ptr) 133 return NULL; 134 n_ptr = tipc_cltr_select_node(c_ptr, ref); 135 if (n_ptr) 136 return n_ptr; 137 } 138 return NULL; 139} 140 141u32 tipc_zone_select_router(struct _zone *z_ptr, u32 addr, u32 ref) 142{ 143 struct cluster *c_ptr; 144 u32 c_num; 145 u32 router; 146 147 if (!z_ptr) 148 return 0; 149 c_ptr = z_ptr->clusters[tipc_cluster(addr)]; 150 router = c_ptr ? tipc_cltr_select_router(c_ptr, ref) : 0; 151 if (router) 152 return router; 153 154 /* Links to any other clusters within the zone? */ 155 for (c_num = 1; c_num <= tipc_max_clusters; c_num++) { 156 c_ptr = z_ptr->clusters[c_num]; 157 router = c_ptr ? tipc_cltr_select_router(c_ptr, ref) : 0; 158 if (router) 159 return router; 160 } 161 return 0; 162} 163 164 165u32 tipc_zone_next_node(u32 addr) 166{ 167 struct cluster *c_ptr = tipc_cltr_find(addr); 168 169 if (c_ptr) 170 return tipc_cltr_next_node(c_ptr, addr); 171 return 0; 172} 173