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b97bf3fd PL |
1 | /* |
2 | * net/tipc/zone.c: TIPC zone management routines | |
3 | * | |
593a5f22 | 4 | * Copyright (c) 2000-2006, Ericsson AB |
b97bf3fd | 5 | * Copyright (c) 2005, Wind River Systems |
b97bf3fd PL |
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 | * | |
9ea1fd3c PL |
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. | |
b97bf3fd PL |
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 | ||
4323add6 | 45 | struct _zone *tipc_zone_create(u32 addr) |
b97bf3fd | 46 | { |
a10bd924 | 47 | struct _zone *z_ptr; |
b97bf3fd PL |
48 | u32 z_num; |
49 | ||
a10bd924 AS |
50 | if (!tipc_addr_domain_valid(addr)) { |
51 | err("Zone creation failed, invalid domain 0x%x\n", addr); | |
1fc54d8f | 52 | return NULL; |
a10bd924 | 53 | } |
b97bf3fd PL |
54 | |
55 | z_ptr = (struct _zone *)kmalloc(sizeof(*z_ptr), GFP_ATOMIC); | |
a10bd924 AS |
56 | if (!z_ptr) { |
57 | warn("Zone creation failed, insufficient memory\n"); | |
58 | return NULL; | |
b97bf3fd | 59 | } |
a10bd924 AS |
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; | |
b97bf3fd PL |
65 | return z_ptr; |
66 | } | |
67 | ||
4323add6 | 68 | void tipc_zone_delete(struct _zone *z_ptr) |
b97bf3fd PL |
69 | { |
70 | u32 c_num; | |
71 | ||
72 | if (!z_ptr) | |
73 | return; | |
74 | for (c_num = 1; c_num <= tipc_max_clusters; c_num++) { | |
4323add6 | 75 | tipc_cltr_delete(z_ptr->clusters[c_num]); |
b97bf3fd PL |
76 | } |
77 | kfree(z_ptr); | |
78 | } | |
79 | ||
4323add6 | 80 | void tipc_zone_attach_cluster(struct _zone *z_ptr, struct cluster *c_ptr) |
b97bf3fd PL |
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 | ||
4323add6 | 90 | void tipc_zone_remove_as_router(struct _zone *z_ptr, u32 router) |
b97bf3fd PL |
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]) { | |
4323add6 PL |
96 | tipc_cltr_remove_as_router(z_ptr->clusters[c_num], |
97 | router); | |
b97bf3fd PL |
98 | } |
99 | } | |
100 | } | |
101 | ||
4323add6 | 102 | void tipc_zone_send_external_routes(struct _zone *z_ptr, u32 dest) |
b97bf3fd PL |
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; | |
4323add6 | 110 | tipc_cltr_send_ext_routes(z_ptr->clusters[c_num], dest); |
b97bf3fd PL |
111 | } |
112 | } | |
113 | } | |
114 | ||
4323add6 | 115 | struct node *tipc_zone_select_remote_node(struct _zone *z_ptr, u32 addr, u32 ref) |
b97bf3fd PL |
116 | { |
117 | struct cluster *c_ptr; | |
118 | struct node *n_ptr; | |
119 | u32 c_num; | |
120 | ||
121 | if (!z_ptr) | |
1fc54d8f | 122 | return NULL; |
b97bf3fd PL |
123 | c_ptr = z_ptr->clusters[tipc_cluster(addr)]; |
124 | if (!c_ptr) | |
1fc54d8f | 125 | return NULL; |
4323add6 | 126 | n_ptr = tipc_cltr_select_node(c_ptr, ref); |
b97bf3fd PL |
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) | |
1fc54d8f | 134 | return NULL; |
4323add6 | 135 | n_ptr = tipc_cltr_select_node(c_ptr, ref); |
b97bf3fd PL |
136 | if (n_ptr) |
137 | return n_ptr; | |
138 | } | |
1fc54d8f | 139 | return NULL; |
b97bf3fd PL |
140 | } |
141 | ||
4323add6 | 142 | u32 tipc_zone_select_router(struct _zone *z_ptr, u32 addr, u32 ref) |
b97bf3fd PL |
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)]; | |
4323add6 | 151 | router = c_ptr ? tipc_cltr_select_router(c_ptr, ref) : 0; |
b97bf3fd PL |
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]; | |
4323add6 | 158 | router = c_ptr ? tipc_cltr_select_router(c_ptr, ref) : 0; |
b97bf3fd PL |
159 | if (router) |
160 | return router; | |
161 | } | |
162 | return 0; | |
163 | } | |
164 | ||
165 | ||
4323add6 | 166 | u32 tipc_zone_next_node(u32 addr) |
b97bf3fd | 167 | { |
4323add6 | 168 | struct cluster *c_ptr = tipc_cltr_find(addr); |
b97bf3fd PL |
169 | |
170 | if (c_ptr) | |
4323add6 | 171 | return tipc_cltr_next_node(c_ptr, addr); |
b97bf3fd PL |
172 | return 0; |
173 | } | |
174 |