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-rw-r--r--net/tipc/zone.c159
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diff --git a/net/tipc/zone.c b/net/tipc/zone.c
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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 "cluster.h"
40#include "node.h"
41
42struct _zone *tipc_zone_create(u32 addr)
43{
44 struct _zone *z_ptr;
45 u32 z_num;
46
47 if (!tipc_addr_domain_valid(addr)) {
48 err("Zone creation failed, invalid domain 0x%x\n", addr);
49 return NULL;
50 }
51
52 z_ptr = kzalloc(sizeof(*z_ptr), GFP_ATOMIC);
53 if (!z_ptr) {
54 warn("Zone creation failed, insufficient memory\n");
55 return NULL;
56 }
57
58 z_num = tipc_zone(addr);
59 z_ptr->addr = tipc_addr(z_num, 0, 0);
60 tipc_net.zones[z_num] = z_ptr;
61 return z_ptr;
62}
63
64void tipc_zone_delete(struct _zone *z_ptr)
65{
66 u32 c_num;
67
68 if (!z_ptr)
69 return;
70 for (c_num = 1; c_num <= tipc_max_clusters; c_num++) {
71 tipc_cltr_delete(z_ptr->clusters[c_num]);
72 }
73 kfree(z_ptr);
74}
75
76void tipc_zone_attach_cluster(struct _zone *z_ptr, struct cluster *c_ptr)
77{
78 u32 c_num = tipc_cluster(c_ptr->addr);
79
80 assert(c_ptr->addr);
81 assert(c_num <= tipc_max_clusters);
82 assert(z_ptr->clusters[c_num] == NULL);
83 z_ptr->clusters[c_num] = c_ptr;
84}
85
86void tipc_zone_remove_as_router(struct _zone *z_ptr, u32 router)
87{
88 u32 c_num;
89
90 for (c_num = 1; c_num <= tipc_max_clusters; c_num++) {
91 if (z_ptr->clusters[c_num]) {
92 tipc_cltr_remove_as_router(z_ptr->clusters[c_num],
93 router);
94 }
95 }
96}
97
98void tipc_zone_send_external_routes(struct _zone *z_ptr, u32 dest)
99{
100 u32 c_num;
101
102 for (c_num = 1; c_num <= tipc_max_clusters; c_num++) {
103 if (z_ptr->clusters[c_num]) {
104 if (in_own_cluster(z_ptr->addr))
105 continue;
106 tipc_cltr_send_ext_routes(z_ptr->clusters[c_num], dest);
107 }
108 }
109}
110
111struct tipc_node *tipc_zone_select_remote_node(struct _zone *z_ptr, u32 addr, u32 ref)
112{
113 struct cluster *c_ptr;
114 struct tipc_node *n_ptr;
115 u32 c_num;
116
117 if (!z_ptr)
118 return NULL;
119 c_ptr = z_ptr->clusters[tipc_cluster(addr)];
120 if (!c_ptr)
121 return NULL;
122 n_ptr = tipc_cltr_select_node(c_ptr, ref);
123 if (n_ptr)
124 return n_ptr;
125
126 /* Links to any other clusters within this zone ? */
127 for (c_num = 1; c_num <= tipc_max_clusters; c_num++) {
128 c_ptr = z_ptr->clusters[c_num];
129 if (!c_ptr)
130 return NULL;
131 n_ptr = tipc_cltr_select_node(c_ptr, ref);
132 if (n_ptr)
133 return n_ptr;
134 }
135 return NULL;
136}
137
138u32 tipc_zone_select_router(struct _zone *z_ptr, u32 addr, u32 ref)
139{
140 struct cluster *c_ptr;
141 u32 c_num;
142 u32 router;
143
144 if (!z_ptr)
145 return 0;
146 c_ptr = z_ptr->clusters[tipc_cluster(addr)];
147 router = c_ptr ? tipc_cltr_select_router(c_ptr, ref) : 0;
148 if (router)
149 return router;
150
151 /* Links to any other clusters within the zone? */
152 for (c_num = 1; c_num <= tipc_max_clusters; c_num++) {
153 c_ptr = z_ptr->clusters[c_num];
154 router = c_ptr ? tipc_cltr_select_router(c_ptr, ref) : 0;
155 if (router)
156 return router;
157 }
158 return 0;
159}