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Per Lidenb97bf3f2006-01-02 19:04:38 +01001/*
2 * net/tipc/zone.c: TIPC zone management routines
3 *
Per Liden593a5f22006-01-11 19:14:19 +01004 * Copyright (c) 2000-2006, Ericsson AB
Per Lidenb97bf3f2006-01-02 19:04:38 +01005 * Copyright (c) 2005, Wind River Systems
Per Lidenb97bf3f2006-01-02 19:04:38 +01006 * 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 *
Per Liden9ea1fd32006-01-11 13:30:43 +010011 * 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.
Per Lidenb97bf3f2006-01-02 19:04:38 +010023 *
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
Per Liden4323add2006-01-18 00:38:21 +010045struct _zone *tipc_zone_create(u32 addr)
Per Lidenb97bf3f2006-01-02 19:04:38 +010046{
47 struct _zone *z_ptr = 0;
48 u32 z_num;
49
Per Liden4323add2006-01-18 00:38:21 +010050 if (!tipc_addr_domain_valid(addr))
Per Lidenb97bf3f2006-01-02 19:04:38 +010051 return 0;
52
53 z_ptr = (struct _zone *)kmalloc(sizeof(*z_ptr), GFP_ATOMIC);
54 if (z_ptr != NULL) {
55 memset(z_ptr, 0, sizeof(*z_ptr));
56 z_num = tipc_zone(addr);
57 z_ptr->addr = tipc_addr(z_num, 0, 0);
Per Liden4323add2006-01-18 00:38:21 +010058 tipc_net.zones[z_num] = z_ptr;
Per Lidenb97bf3f2006-01-02 19:04:38 +010059 }
60 return z_ptr;
61}
62
Per Liden4323add2006-01-18 00:38:21 +010063void tipc_zone_delete(struct _zone *z_ptr)
Per Lidenb97bf3f2006-01-02 19:04:38 +010064{
65 u32 c_num;
66
67 if (!z_ptr)
68 return;
69 for (c_num = 1; c_num <= tipc_max_clusters; c_num++) {
Per Liden4323add2006-01-18 00:38:21 +010070 tipc_cltr_delete(z_ptr->clusters[c_num]);
Per Lidenb97bf3f2006-01-02 19:04:38 +010071 }
72 kfree(z_ptr);
73}
74
Per Liden4323add2006-01-18 00:38:21 +010075void tipc_zone_attach_cluster(struct _zone *z_ptr, struct cluster *c_ptr)
Per Lidenb97bf3f2006-01-02 19:04:38 +010076{
77 u32 c_num = tipc_cluster(c_ptr->addr);
78
79 assert(c_ptr->addr);
80 assert(c_num <= tipc_max_clusters);
81 assert(z_ptr->clusters[c_num] == 0);
82 z_ptr->clusters[c_num] = c_ptr;
83}
84
Per Liden4323add2006-01-18 00:38:21 +010085void tipc_zone_remove_as_router(struct _zone *z_ptr, u32 router)
Per Lidenb97bf3f2006-01-02 19:04:38 +010086{
87 u32 c_num;
88
89 for (c_num = 1; c_num <= tipc_max_clusters; c_num++) {
90 if (z_ptr->clusters[c_num]) {
Per Liden4323add2006-01-18 00:38:21 +010091 tipc_cltr_remove_as_router(z_ptr->clusters[c_num],
92 router);
Per Lidenb97bf3f2006-01-02 19:04:38 +010093 }
94 }
95}
96
Per Liden4323add2006-01-18 00:38:21 +010097void tipc_zone_send_external_routes(struct _zone *z_ptr, u32 dest)
Per Lidenb97bf3f2006-01-02 19:04:38 +010098{
99 u32 c_num;
100
101 for (c_num = 1; c_num <= tipc_max_clusters; c_num++) {
102 if (z_ptr->clusters[c_num]) {
103 if (in_own_cluster(z_ptr->addr))
104 continue;
Per Liden4323add2006-01-18 00:38:21 +0100105 tipc_cltr_send_ext_routes(z_ptr->clusters[c_num], dest);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100106 }
107 }
108}
109
Per Liden4323add2006-01-18 00:38:21 +0100110struct node *tipc_zone_select_remote_node(struct _zone *z_ptr, u32 addr, u32 ref)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100111{
112 struct cluster *c_ptr;
113 struct node *n_ptr;
114 u32 c_num;
115
116 if (!z_ptr)
117 return 0;
118 c_ptr = z_ptr->clusters[tipc_cluster(addr)];
119 if (!c_ptr)
120 return 0;
Per Liden4323add2006-01-18 00:38:21 +0100121 n_ptr = tipc_cltr_select_node(c_ptr, ref);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100122 if (n_ptr)
123 return n_ptr;
124
125 /* Links to any other clusters within this zone ? */
126 for (c_num = 1; c_num <= tipc_max_clusters; c_num++) {
127 c_ptr = z_ptr->clusters[c_num];
128 if (!c_ptr)
129 return 0;
Per Liden4323add2006-01-18 00:38:21 +0100130 n_ptr = tipc_cltr_select_node(c_ptr, ref);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100131 if (n_ptr)
132 return n_ptr;
133 }
134 return 0;
135}
136
Per Liden4323add2006-01-18 00:38:21 +0100137u32 tipc_zone_select_router(struct _zone *z_ptr, u32 addr, u32 ref)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100138{
139 struct cluster *c_ptr;
140 u32 c_num;
141 u32 router;
142
143 if (!z_ptr)
144 return 0;
145 c_ptr = z_ptr->clusters[tipc_cluster(addr)];
Per Liden4323add2006-01-18 00:38:21 +0100146 router = c_ptr ? tipc_cltr_select_router(c_ptr, ref) : 0;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100147 if (router)
148 return router;
149
150 /* Links to any other clusters within the zone? */
151 for (c_num = 1; c_num <= tipc_max_clusters; c_num++) {
152 c_ptr = z_ptr->clusters[c_num];
Per Liden4323add2006-01-18 00:38:21 +0100153 router = c_ptr ? tipc_cltr_select_router(c_ptr, ref) : 0;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100154 if (router)
155 return router;
156 }
157 return 0;
158}
159
160
Per Liden4323add2006-01-18 00:38:21 +0100161u32 tipc_zone_next_node(u32 addr)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100162{
Per Liden4323add2006-01-18 00:38:21 +0100163 struct cluster *c_ptr = tipc_cltr_find(addr);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100164
165 if (c_ptr)
Per Liden4323add2006-01-18 00:38:21 +0100166 return tipc_cltr_next_node(c_ptr, addr);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100167 return 0;
168}
169