net/tipc/zone.c

   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
  45 struct _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 = (struct _zone *)kmalloc(sizeof(*z_ptr), GFP_ATOMIC);
  56         if (!z_ptr) {
  57                 warn("Zone creation failed, insufficient memory\n");
  58                 return NULL;
  59         }
  60
  61         memset(z_ptr, 0, sizeof(*z_ptr));
  62         z_num = tipc_zone(addr);
  63         z_ptr->addr = tipc_addr(z_num, 0, 0);
  64         tipc_net.zones[z_num] = z_ptr;
  65         return z_ptr;
  66 }
  67
  68 void tipc_zone_delete(struct _zone *z_ptr)
  69 {
  70         u32 c_num;
  71
  72         if (!z_ptr)
  73                 return;
  74         for (c_num = 1; c_num <= tipc_max_clusters; c_num++) {
  75                 tipc_cltr_delete(z_ptr->clusters[c_num]);
  76         }
  77         kfree(z_ptr);
  78 }
  79
  80 void tipc_zone_attach_cluster(struct _zone *z_ptr, struct cluster *c_ptr)
  81 {
  82         u32 c_num = tipc_cluster(c_ptr->addr);
  83
  84         assert(c_ptr->addr);
  85         assert(c_num <= tipc_max_clusters);
  86         assert(z_ptr->clusters[c_num] == 0);
  87         z_ptr->clusters[c_num] = c_ptr;
  88 }
  89
  90 void tipc_zone_remove_as_router(struct _zone *z_ptr, u32 router)
  91 {
  92         u32 c_num;
  93
  94         for (c_num = 1; c_num <= tipc_max_clusters; c_num++) {
  95                 if (z_ptr->clusters[c_num]) {
  96                         tipc_cltr_remove_as_router(z_ptr->clusters[c_num],
  97                                                    router);
  98                 }
  99         }
 100 }
 101
 102 void tipc_zone_send_external_routes(struct _zone *z_ptr, u32 dest)
 103 {
 104         u32 c_num;
 105
 106         for (c_num = 1; c_num <= tipc_max_clusters; c_num++) {
 107                 if (z_ptr->clusters[c_num]) {
 108                         if (in_own_cluster(z_ptr->addr))
 109                                 continue;
 110                         tipc_cltr_send_ext_routes(z_ptr->clusters[c_num], dest);
 111                 }
 112         }
 113 }
 114
 115 struct node *tipc_zone_select_remote_node(struct _zone *z_ptr, u32 addr, u32 ref)
 116 {
 117         struct cluster *c_ptr;
 118         struct node *n_ptr;
 119         u32 c_num;
 120
 121         if (!z_ptr)
 122                 return NULL;
 123         c_ptr = z_ptr->clusters[tipc_cluster(addr)];
 124         if (!c_ptr)
 125                 return NULL;
 126         n_ptr = tipc_cltr_select_node(c_ptr, ref);
 127         if (n_ptr)
 128                 return n_ptr;
 129
 130         /* Links to any other clusters within this zone ? */
 131         for (c_num = 1; c_num <= tipc_max_clusters; c_num++) {
 132                 c_ptr = z_ptr->clusters[c_num];
 133                 if (!c_ptr)
 134                         return NULL;
 135                 n_ptr = tipc_cltr_select_node(c_ptr, ref);
 136                 if (n_ptr)
 137                         return n_ptr;
 138         }
 139         return NULL;
 140 }
 141
 142 u32 tipc_zone_select_router(struct _zone *z_ptr, u32 addr, u32 ref)
 143 {
 144         struct cluster *c_ptr;
 145         u32 c_num;
 146         u32 router;
 147
 148         if (!z_ptr)
 149                 return 0;
 150         c_ptr = z_ptr->clusters[tipc_cluster(addr)];
 151         router = c_ptr ? tipc_cltr_select_router(c_ptr, ref) : 0;
 152         if (router)
 153                 return router;
 154
 155         /* Links to any other clusters within the zone? */
 156         for (c_num = 1; c_num <= tipc_max_clusters; c_num++) {
 157                 c_ptr = z_ptr->clusters[c_num];
 158                 router = c_ptr ? tipc_cltr_select_router(c_ptr, ref) : 0;
 159                 if (router)
 160                         return router;
 161         }
 162         return 0;
 163 }
 164
 165
 166 u32 tipc_zone_next_node(u32 addr)
 167 {
 168         struct cluster *c_ptr = tipc_cltr_find(addr);
 169
 170         if (c_ptr)
 171                 return tipc_cltr_next_node(c_ptr, addr);
 172         return 0;
 173 }
 174