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 #include "crypto.h"
46
47 #include <linux/module.h>
48
49 /* configurable TIPC parameters */
50 unsigned 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->node_addr = 0;
60 tn->trial_addr = 0;
61 tn->addr_trial_end = 0;
62 tn->capabilities = TIPC_NODE_CAPABILITIES;
63 INIT_WORK(&tn->work, tipc_net_finalize_work);
64 memset(tn->node_id, 0, sizeof(tn->node_id));
65 memset(tn->node_id_string, 0, sizeof(tn->node_id_string));
66 tn->mon_threshold = TIPC_DEF_MON_THRESHOLD;
67 get_random_bytes(&tn->random, sizeof(int));
68 INIT_LIST_HEAD(&tn->node_list);
69 spin_lock_init(&tn->node_list_lock);
70
71 #ifdef CONFIG_TIPC_CRYPTO
72 err = tipc_crypto_start(&tn->crypto_tx, net, NULL);
73 if (err)
74 goto out_crypto;
75 #endif
76 err = tipc_sk_rht_init(net);
77 if (err)
78 goto out_sk_rht;
79
80 err = tipc_nametbl_init(net);
81 if (err)
82 goto out_nametbl;
83
84 INIT_LIST_HEAD(&tn->dist_queue);
85
86 err = tipc_bcast_init(net);
87 if (err)
88 goto out_bclink;
89
90 err = tipc_attach_loopback(net);
91 if (err)
92 goto out_bclink;
93
94 return 0;
95
96 out_bclink:
97 tipc_nametbl_stop(net);
98 out_nametbl:
99 tipc_sk_rht_destroy(net);
100 out_sk_rht:
101
102 #ifdef CONFIG_TIPC_CRYPTO
103 tipc_crypto_stop(&tn->crypto_tx);
104 out_crypto:
105 #endif
106 return err;
107 }
108
tipc_exit_net(struct net * net)109 static void __net_exit tipc_exit_net(struct net *net)
110 {
111 struct tipc_net *tn = tipc_net(net);
112
113 tipc_detach_loopback(net);
114 tipc_net_stop(net);
115 /* Make sure the tipc_net_finalize_work() finished */
116 cancel_work_sync(&tn->work);
117 tipc_bcast_stop(net);
118 tipc_nametbl_stop(net);
119 tipc_sk_rht_destroy(net);
120 #ifdef CONFIG_TIPC_CRYPTO
121 tipc_crypto_stop(&tipc_net(net)->crypto_tx);
122 #endif
123 while (atomic_read(&tn->wq_count))
124 cond_resched();
125 }
126
tipc_pernet_pre_exit(struct net * net)127 static void __net_exit tipc_pernet_pre_exit(struct net *net)
128 {
129 tipc_node_pre_cleanup_net(net);
130 }
131
132 static struct pernet_operations tipc_pernet_pre_exit_ops = {
133 .pre_exit = tipc_pernet_pre_exit,
134 };
135
136 static struct pernet_operations tipc_net_ops = {
137 .init = tipc_init_net,
138 .exit = tipc_exit_net,
139 .id = &tipc_net_id,
140 .size = sizeof(struct tipc_net),
141 };
142
143 static struct pernet_operations tipc_topsrv_net_ops = {
144 .init = tipc_topsrv_init_net,
145 .exit = tipc_topsrv_exit_net,
146 };
147
tipc_init(void)148 static int __init tipc_init(void)
149 {
150 int err;
151
152 pr_info("Activated (version " TIPC_MOD_VER ")\n");
153
154 sysctl_tipc_rmem[0] = RCVBUF_MIN;
155 sysctl_tipc_rmem[1] = RCVBUF_DEF;
156 sysctl_tipc_rmem[2] = RCVBUF_MAX;
157
158 err = tipc_register_sysctl();
159 if (err)
160 goto out_sysctl;
161
162 err = register_pernet_device(&tipc_net_ops);
163 if (err)
164 goto out_pernet;
165
166 err = tipc_socket_init();
167 if (err)
168 goto out_socket;
169
170 err = register_pernet_device(&tipc_topsrv_net_ops);
171 if (err)
172 goto out_pernet_topsrv;
173
174 err = register_pernet_subsys(&tipc_pernet_pre_exit_ops);
175 if (err)
176 goto out_register_pernet_subsys;
177
178 err = tipc_bearer_setup();
179 if (err)
180 goto out_bearer;
181
182 err = tipc_netlink_start();
183 if (err)
184 goto out_netlink;
185
186 err = tipc_netlink_compat_start();
187 if (err)
188 goto out_netlink_compat;
189
190 pr_info("Started in single node mode\n");
191 return 0;
192
193 out_netlink_compat:
194 tipc_netlink_stop();
195 out_netlink:
196 tipc_bearer_cleanup();
197 out_bearer:
198 unregister_pernet_subsys(&tipc_pernet_pre_exit_ops);
199 out_register_pernet_subsys:
200 unregister_pernet_device(&tipc_topsrv_net_ops);
201 out_pernet_topsrv:
202 tipc_socket_stop();
203 out_socket:
204 unregister_pernet_device(&tipc_net_ops);
205 out_pernet:
206 tipc_unregister_sysctl();
207 out_sysctl:
208 pr_err("Unable to start in single node mode\n");
209 return err;
210 }
211
tipc_exit(void)212 static void __exit tipc_exit(void)
213 {
214 tipc_netlink_compat_stop();
215 tipc_netlink_stop();
216 tipc_bearer_cleanup();
217 unregister_pernet_subsys(&tipc_pernet_pre_exit_ops);
218 unregister_pernet_device(&tipc_topsrv_net_ops);
219 tipc_socket_stop();
220 unregister_pernet_device(&tipc_net_ops);
221 tipc_unregister_sysctl();
222
223 pr_info("Deactivated\n");
224 }
225
226 module_init(tipc_init);
227 module_exit(tipc_exit);
228
229 MODULE_DESCRIPTION("TIPC: Transparent Inter Process Communication");
230 MODULE_LICENSE("Dual BSD/GPL");
231 MODULE_VERSION(TIPC_MOD_VER);
232