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->final_work.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 /* Make sure the tipc_net_finalize_work() finished */
115 cancel_work_sync(&tn->final_work.work);
116 tipc_net_stop(net);
117
118 tipc_bcast_stop(net);
119 tipc_nametbl_stop(net);
120 tipc_sk_rht_destroy(net);
121 #ifdef CONFIG_TIPC_CRYPTO
122 tipc_crypto_stop(&tipc_net(net)->crypto_tx);
123 #endif
124 while (atomic_read(&tn->wq_count))
125 cond_resched();
126 }
127
tipc_pernet_pre_exit(struct net * net)128 static void __net_exit tipc_pernet_pre_exit(struct net *net)
129 {
130 tipc_node_pre_cleanup_net(net);
131 }
132
133 static struct pernet_operations tipc_pernet_pre_exit_ops = {
134 .pre_exit = tipc_pernet_pre_exit,
135 };
136
137 static struct pernet_operations tipc_net_ops = {
138 .init = tipc_init_net,
139 .exit = tipc_exit_net,
140 .id = &tipc_net_id,
141 .size = sizeof(struct tipc_net),
142 };
143
144 static struct pernet_operations tipc_topsrv_net_ops = {
145 .init = tipc_topsrv_init_net,
146 .exit = tipc_topsrv_exit_net,
147 };
148
tipc_init(void)149 static int __init tipc_init(void)
150 {
151 int err;
152
153 pr_info("Activated (version " TIPC_MOD_VER ")\n");
154
155 sysctl_tipc_rmem[0] = RCVBUF_MIN;
156 sysctl_tipc_rmem[1] = RCVBUF_DEF;
157 sysctl_tipc_rmem[2] = RCVBUF_MAX;
158
159 err = tipc_register_sysctl();
160 if (err)
161 goto out_sysctl;
162
163 err = register_pernet_device(&tipc_net_ops);
164 if (err)
165 goto out_pernet;
166
167 err = tipc_socket_init();
168 if (err)
169 goto out_socket;
170
171 err = register_pernet_device(&tipc_topsrv_net_ops);
172 if (err)
173 goto out_pernet_topsrv;
174
175 err = register_pernet_subsys(&tipc_pernet_pre_exit_ops);
176 if (err)
177 goto out_register_pernet_subsys;
178
179 err = tipc_bearer_setup();
180 if (err)
181 goto out_bearer;
182
183 err = tipc_netlink_start();
184 if (err)
185 goto out_netlink;
186
187 err = tipc_netlink_compat_start();
188 if (err)
189 goto out_netlink_compat;
190
191 pr_info("Started in single node mode\n");
192 return 0;
193
194 out_netlink_compat:
195 tipc_netlink_stop();
196 out_netlink:
197 tipc_bearer_cleanup();
198 out_bearer:
199 unregister_pernet_subsys(&tipc_pernet_pre_exit_ops);
200 out_register_pernet_subsys:
201 unregister_pernet_device(&tipc_topsrv_net_ops);
202 out_pernet_topsrv:
203 tipc_socket_stop();
204 out_socket:
205 unregister_pernet_device(&tipc_net_ops);
206 out_pernet:
207 tipc_unregister_sysctl();
208 out_sysctl:
209 pr_err("Unable to start in single node mode\n");
210 return err;
211 }
212
tipc_exit(void)213 static void __exit tipc_exit(void)
214 {
215 tipc_netlink_compat_stop();
216 tipc_netlink_stop();
217 tipc_bearer_cleanup();
218 unregister_pernet_subsys(&tipc_pernet_pre_exit_ops);
219 unregister_pernet_device(&tipc_topsrv_net_ops);
220 tipc_socket_stop();
221 unregister_pernet_device(&tipc_net_ops);
222 tipc_unregister_sysctl();
223
224 pr_info("Deactivated\n");
225 }
226
227 module_init(tipc_init);
228 module_exit(tipc_exit);
229
230 MODULE_DESCRIPTION("TIPC: Transparent Inter Process Communication");
231 MODULE_LICENSE("Dual BSD/GPL");
232 MODULE_VERSION(TIPC_MOD_VER);
233