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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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
38 
39 #include "core.h"
40 #include "name_table.h"
41 #include "subscr.h"
42 #include "bearer.h"
43 #include "net.h"
44 #include "socket.h"
45 #include "bcast.h"
46 
47 #include <linux/module.h>
48 
49 /* configurable TIPC parameters */
50 int tipc_net_id __read_mostly;
51 int sysctl_tipc_rmem[3] __read_mostly;	/* min/default/max */
52 
tipc_init_net(struct net * net)53 static int __net_init tipc_init_net(struct net *net)
54 {
55 	struct tipc_net *tn = net_generic(net, tipc_net_id);
56 	int err;
57 
58 	tn->net_id = 4711;
59 	tn->own_addr = 0;
60 	tn->mon_threshold = TIPC_DEF_MON_THRESHOLD;
61 	get_random_bytes(&tn->random, sizeof(int));
62 	INIT_LIST_HEAD(&tn->node_list);
63 	spin_lock_init(&tn->node_list_lock);
64 
65 	err = tipc_sk_rht_init(net);
66 	if (err)
67 		goto out_sk_rht;
68 
69 	err = tipc_nametbl_init(net);
70 	if (err)
71 		goto out_nametbl;
72 
73 	INIT_LIST_HEAD(&tn->dist_queue);
74 	err = tipc_topsrv_start(net);
75 	if (err)
76 		goto out_subscr;
77 
78 	err = tipc_bcast_init(net);
79 	if (err)
80 		goto out_bclink;
81 
82 	return 0;
83 
84 out_bclink:
85 	tipc_bcast_stop(net);
86 out_subscr:
87 	tipc_nametbl_stop(net);
88 out_nametbl:
89 	tipc_sk_rht_destroy(net);
90 out_sk_rht:
91 	return err;
92 }
93 
tipc_exit_net(struct net * net)94 static void __net_exit tipc_exit_net(struct net *net)
95 {
96 	tipc_topsrv_stop(net);
97 	tipc_net_stop(net);
98 	tipc_bcast_stop(net);
99 	tipc_nametbl_stop(net);
100 	tipc_sk_rht_destroy(net);
101 }
102 
103 static struct pernet_operations tipc_net_ops = {
104 	.init = tipc_init_net,
105 	.exit = tipc_exit_net,
106 	.id   = &tipc_net_id,
107 	.size = sizeof(struct tipc_net),
108 };
109 
tipc_init(void)110 static int __init tipc_init(void)
111 {
112 	int err;
113 
114 	pr_info("Activated (version " TIPC_MOD_VER ")\n");
115 
116 	sysctl_tipc_rmem[0] = RCVBUF_MIN;
117 	sysctl_tipc_rmem[1] = RCVBUF_DEF;
118 	sysctl_tipc_rmem[2] = RCVBUF_MAX;
119 
120 	err = tipc_netlink_start();
121 	if (err)
122 		goto out_netlink;
123 
124 	err = tipc_netlink_compat_start();
125 	if (err)
126 		goto out_netlink_compat;
127 
128 	err = tipc_socket_init();
129 	if (err)
130 		goto out_socket;
131 
132 	err = tipc_register_sysctl();
133 	if (err)
134 		goto out_sysctl;
135 
136 	err = register_pernet_subsys(&tipc_net_ops);
137 	if (err)
138 		goto out_pernet;
139 
140 	err = tipc_bearer_setup();
141 	if (err)
142 		goto out_bearer;
143 
144 	pr_info("Started in single node mode\n");
145 	return 0;
146 out_bearer:
147 	unregister_pernet_subsys(&tipc_net_ops);
148 out_pernet:
149 	tipc_unregister_sysctl();
150 out_sysctl:
151 	tipc_socket_stop();
152 out_socket:
153 	tipc_netlink_compat_stop();
154 out_netlink_compat:
155 	tipc_netlink_stop();
156 out_netlink:
157 	pr_err("Unable to start in single node mode\n");
158 	return err;
159 }
160 
tipc_exit(void)161 static void __exit tipc_exit(void)
162 {
163 	tipc_bearer_cleanup();
164 	unregister_pernet_subsys(&tipc_net_ops);
165 	tipc_netlink_stop();
166 	tipc_netlink_compat_stop();
167 	tipc_socket_stop();
168 	tipc_unregister_sysctl();
169 
170 	pr_info("Deactivated\n");
171 }
172 
173 module_init(tipc_init);
174 module_exit(tipc_exit);
175 
176 MODULE_DESCRIPTION("TIPC: Transparent Inter Process Communication");
177 MODULE_LICENSE("Dual BSD/GPL");
178 MODULE_VERSION(TIPC_MOD_VER);
179