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
tipc_zone_create(u32 addr)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 = 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
tipc_zone_delete(struct _zone * z_ptr)67 void 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
tipc_zone_attach_cluster(struct _zone * z_ptr,struct cluster * c_ptr)79 void 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
tipc_zone_remove_as_router(struct _zone * z_ptr,u32 router)89 void 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
tipc_zone_send_external_routes(struct _zone * z_ptr,u32 dest)101 void 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
tipc_zone_select_remote_node(struct _zone * z_ptr,u32 addr,u32 ref)114 struct 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
tipc_zone_select_router(struct _zone * z_ptr,u32 addr,u32 ref)141 u32 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
tipc_zone_next_node(u32 addr)165 u32 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
174