1 /*
2 * net/tipc/core.c: TIPC module code
3 *
4 * Copyright (c) 2003-2006, 2013, Ericsson AB
5 * Copyright (c) 2005-2006, 2010-2013, 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 "name_table.h"
39 #include "subscr.h"
40 #include "bearer.h"
41 #include "net.h"
42 #include "socket.h"
43 #include "bcast.h"
44 #include "node.h"
45
46 #include <linux/module.h>
47
48 /* configurable TIPC parameters */
49 unsigned int tipc_net_id __read_mostly;
50 int sysctl_tipc_rmem[3] __read_mostly; /* min/default/max */
51
tipc_init_net(struct net * net)52 static int __net_init tipc_init_net(struct net *net)
53 {
54 struct tipc_net *tn = net_generic(net, tipc_net_id);
55 int err;
56
57 tn->net_id = 4711;
58 tn->node_addr = 0;
59 tn->trial_addr = 0;
60 tn->addr_trial_end = 0;
61 tn->capabilities = TIPC_NODE_CAPABILITIES;
62 memset(tn->node_id, 0, sizeof(tn->node_id));
63 memset(tn->node_id_string, 0, sizeof(tn->node_id_string));
64 tn->mon_threshold = TIPC_DEF_MON_THRESHOLD;
65 get_random_bytes(&tn->random, sizeof(int));
66 INIT_LIST_HEAD(&tn->node_list);
67 spin_lock_init(&tn->node_list_lock);
68
69 err = tipc_sk_rht_init(net);
70 if (err)
71 goto out_sk_rht;
72
73 err = tipc_nametbl_init(net);
74 if (err)
75 goto out_nametbl;
76
77 INIT_LIST_HEAD(&tn->dist_queue);
78
79 err = tipc_bcast_init(net);
80 if (err)
81 goto out_bclink;
82
83 err = tipc_attach_loopback(net);
84 if (err)
85 goto out_bclink;
86
87 return 0;
88
89 out_bclink:
90 tipc_nametbl_stop(net);
91 out_nametbl:
92 tipc_sk_rht_destroy(net);
93 out_sk_rht:
94 return err;
95 }
96
tipc_exit_net(struct net * net)97 static void __net_exit tipc_exit_net(struct net *net)
98 {
99 tipc_detach_loopback(net);
100 tipc_net_stop(net);
101 tipc_bcast_stop(net);
102 tipc_nametbl_stop(net);
103 tipc_sk_rht_destroy(net);
104 }
105
106 static struct pernet_operations tipc_net_ops = {
107 .init = tipc_init_net,
108 .exit = tipc_exit_net,
109 .id = &tipc_net_id,
110 .size = sizeof(struct tipc_net),
111 };
112
113 static struct pernet_operations tipc_topsrv_net_ops = {
114 .init = tipc_topsrv_init_net,
115 .exit = tipc_topsrv_exit_net,
116 };
117
tipc_init(void)118 static int __init tipc_init(void)
119 {
120 int err;
121
122 pr_info("Activated (version " TIPC_MOD_VER ")\n");
123
124 sysctl_tipc_rmem[0] = RCVBUF_MIN;
125 sysctl_tipc_rmem[1] = RCVBUF_DEF;
126 sysctl_tipc_rmem[2] = RCVBUF_MAX;
127
128 err = tipc_register_sysctl();
129 if (err)
130 goto out_sysctl;
131
132 err = register_pernet_device(&tipc_net_ops);
133 if (err)
134 goto out_pernet;
135
136 err = tipc_socket_init();
137 if (err)
138 goto out_socket;
139
140 err = register_pernet_device(&tipc_topsrv_net_ops);
141 if (err)
142 goto out_pernet_topsrv;
143
144 err = tipc_bearer_setup();
145 if (err)
146 goto out_bearer;
147
148 err = tipc_netlink_start();
149 if (err)
150 goto out_netlink;
151
152 err = tipc_netlink_compat_start();
153 if (err)
154 goto out_netlink_compat;
155
156 pr_info("Started in single node mode\n");
157 return 0;
158
159 out_netlink_compat:
160 tipc_netlink_stop();
161 out_netlink:
162 tipc_bearer_cleanup();
163 out_bearer:
164 unregister_pernet_device(&tipc_topsrv_net_ops);
165 out_pernet_topsrv:
166 tipc_socket_stop();
167 out_socket:
168 unregister_pernet_device(&tipc_net_ops);
169 out_pernet:
170 tipc_unregister_sysctl();
171 out_sysctl:
172 pr_err("Unable to start in single node mode\n");
173 return err;
174 }
175
tipc_exit(void)176 static void __exit tipc_exit(void)
177 {
178 tipc_netlink_compat_stop();
179 tipc_netlink_stop();
180 tipc_bearer_cleanup();
181 unregister_pernet_device(&tipc_topsrv_net_ops);
182 tipc_socket_stop();
183 unregister_pernet_device(&tipc_net_ops);
184 tipc_unregister_sysctl();
185
186 pr_info("Deactivated\n");
187 }
188
189 module_init(tipc_init);
190 module_exit(tipc_exit);
191
192 MODULE_DESCRIPTION("TIPC: Transparent Inter Process Communication");
193 MODULE_LICENSE("Dual BSD/GPL");
194 MODULE_VERSION(TIPC_MOD_VER);
195