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 | |
53 | static int __net_init tipc_init_net(struct net *net) |
54 | { |
55 | struct tipc_net *tn = net_generic(net, id: 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(buf: &tn->random, len: sizeof(int)); |
68 | INIT_LIST_HEAD(list: &tn->node_list); |
69 | spin_lock_init(&tn->node_list_lock); |
70 | |
71 | #ifdef CONFIG_TIPC_CRYPTO |
72 | err = tipc_crypto_start(crypto: &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 | err = tipc_bcast_init(net); |
85 | if (err) |
86 | goto out_bclink; |
87 | |
88 | err = tipc_attach_loopback(net); |
89 | if (err) |
90 | goto out_bclink; |
91 | |
92 | return 0; |
93 | |
94 | out_bclink: |
95 | tipc_nametbl_stop(net); |
96 | out_nametbl: |
97 | tipc_sk_rht_destroy(net); |
98 | out_sk_rht: |
99 | |
100 | #ifdef CONFIG_TIPC_CRYPTO |
101 | tipc_crypto_stop(crypto: &tn->crypto_tx); |
102 | out_crypto: |
103 | #endif |
104 | return err; |
105 | } |
106 | |
107 | static void __net_exit tipc_exit_net(struct net *net) |
108 | { |
109 | struct tipc_net *tn = tipc_net(net); |
110 | |
111 | tipc_detach_loopback(net); |
112 | tipc_net_stop(net); |
113 | /* Make sure the tipc_net_finalize_work() finished */ |
114 | cancel_work_sync(work: &tn->work); |
115 | tipc_bcast_stop(net); |
116 | tipc_nametbl_stop(net); |
117 | tipc_sk_rht_destroy(net); |
118 | #ifdef CONFIG_TIPC_CRYPTO |
119 | tipc_crypto_stop(crypto: &tipc_net(net)->crypto_tx); |
120 | #endif |
121 | while (atomic_read(v: &tn->wq_count)) |
122 | cond_resched(); |
123 | } |
124 | |
125 | static void __net_exit tipc_pernet_pre_exit(struct net *net) |
126 | { |
127 | tipc_node_pre_cleanup_net(exit_net: net); |
128 | } |
129 | |
130 | static struct pernet_operations tipc_pernet_pre_exit_ops = { |
131 | .pre_exit = tipc_pernet_pre_exit, |
132 | }; |
133 | |
134 | static struct pernet_operations tipc_net_ops = { |
135 | .init = tipc_init_net, |
136 | .exit = tipc_exit_net, |
137 | .id = &tipc_net_id, |
138 | .size = sizeof(struct tipc_net), |
139 | }; |
140 | |
141 | static struct pernet_operations tipc_topsrv_net_ops = { |
142 | .init = tipc_topsrv_init_net, |
143 | .exit = tipc_topsrv_exit_net, |
144 | }; |
145 | |
146 | static int __init tipc_init(void) |
147 | { |
148 | int err; |
149 | |
150 | pr_info("Activated (version " TIPC_MOD_VER ")\n" ); |
151 | |
152 | sysctl_tipc_rmem[0] = RCVBUF_MIN; |
153 | sysctl_tipc_rmem[1] = RCVBUF_DEF; |
154 | sysctl_tipc_rmem[2] = RCVBUF_MAX; |
155 | |
156 | err = tipc_register_sysctl(); |
157 | if (err) |
158 | goto out_sysctl; |
159 | |
160 | err = register_pernet_device(&tipc_net_ops); |
161 | if (err) |
162 | goto out_pernet; |
163 | |
164 | err = tipc_socket_init(); |
165 | if (err) |
166 | goto out_socket; |
167 | |
168 | err = register_pernet_device(&tipc_topsrv_net_ops); |
169 | if (err) |
170 | goto out_pernet_topsrv; |
171 | |
172 | err = register_pernet_subsys(&tipc_pernet_pre_exit_ops); |
173 | if (err) |
174 | goto out_register_pernet_subsys; |
175 | |
176 | err = tipc_bearer_setup(); |
177 | if (err) |
178 | goto out_bearer; |
179 | |
180 | err = tipc_netlink_start(); |
181 | if (err) |
182 | goto out_netlink; |
183 | |
184 | err = tipc_netlink_compat_start(); |
185 | if (err) |
186 | goto out_netlink_compat; |
187 | |
188 | pr_info("Started in single node mode\n" ); |
189 | return 0; |
190 | |
191 | out_netlink_compat: |
192 | tipc_netlink_stop(); |
193 | out_netlink: |
194 | tipc_bearer_cleanup(); |
195 | out_bearer: |
196 | unregister_pernet_subsys(&tipc_pernet_pre_exit_ops); |
197 | out_register_pernet_subsys: |
198 | unregister_pernet_device(&tipc_topsrv_net_ops); |
199 | out_pernet_topsrv: |
200 | tipc_socket_stop(); |
201 | out_socket: |
202 | unregister_pernet_device(&tipc_net_ops); |
203 | out_pernet: |
204 | tipc_unregister_sysctl(); |
205 | out_sysctl: |
206 | pr_err("Unable to start in single node mode\n" ); |
207 | return err; |
208 | } |
209 | |
210 | static void __exit tipc_exit(void) |
211 | { |
212 | tipc_netlink_compat_stop(); |
213 | tipc_netlink_stop(); |
214 | tipc_bearer_cleanup(); |
215 | unregister_pernet_subsys(&tipc_pernet_pre_exit_ops); |
216 | unregister_pernet_device(&tipc_topsrv_net_ops); |
217 | tipc_socket_stop(); |
218 | unregister_pernet_device(&tipc_net_ops); |
219 | tipc_unregister_sysctl(); |
220 | |
221 | pr_info("Deactivated\n" ); |
222 | } |
223 | |
224 | module_init(tipc_init); |
225 | module_exit(tipc_exit); |
226 | |
227 | MODULE_DESCRIPTION("TIPC: Transparent Inter Process Communication" ); |
228 | MODULE_LICENSE("Dual BSD/GPL" ); |
229 | MODULE_VERSION(TIPC_MOD_VER); |
230 | |