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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#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 */
50unsigned int tipc_net_id __read_mostly;
51int sysctl_tipc_rmem[3] __read_mostly; /* min/default/max */
52
53static 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 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
94out_bclink:
95 tipc_nametbl_stop(net);
96out_nametbl:
97 tipc_sk_rht_destroy(net);
98out_sk_rht:
99
100#ifdef CONFIG_TIPC_CRYPTO
101 tipc_crypto_stop(&tn->crypto_tx);
102out_crypto:
103#endif
104 return err;
105}
106
107static 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 /* Make sure the tipc_net_finalize_work() finished */
113 cancel_work_sync(&tn->work);
114 tipc_net_stop(net);
115
116 tipc_bcast_stop(net);
117 tipc_nametbl_stop(net);
118 tipc_sk_rht_destroy(net);
119#ifdef CONFIG_TIPC_CRYPTO
120 tipc_crypto_stop(&tipc_net(net)->crypto_tx);
121#endif
122 while (atomic_read(&tn->wq_count))
123 cond_resched();
124}
125
126static void __net_exit tipc_pernet_pre_exit(struct net *net)
127{
128 tipc_node_pre_cleanup_net(net);
129}
130
131static struct pernet_operations tipc_pernet_pre_exit_ops = {
132 .pre_exit = tipc_pernet_pre_exit,
133};
134
135static struct pernet_operations tipc_net_ops = {
136 .init = tipc_init_net,
137 .exit = tipc_exit_net,
138 .id = &tipc_net_id,
139 .size = sizeof(struct tipc_net),
140};
141
142static struct pernet_operations tipc_topsrv_net_ops = {
143 .init = tipc_topsrv_init_net,
144 .exit = tipc_topsrv_exit_net,
145};
146
147static int __init tipc_init(void)
148{
149 int err;
150
151 pr_info("Activated (version " TIPC_MOD_VER ")\n");
152
153 sysctl_tipc_rmem[0] = RCVBUF_MIN;
154 sysctl_tipc_rmem[1] = RCVBUF_DEF;
155 sysctl_tipc_rmem[2] = RCVBUF_MAX;
156
157 err = tipc_register_sysctl();
158 if (err)
159 goto out_sysctl;
160
161 err = register_pernet_device(&tipc_net_ops);
162 if (err)
163 goto out_pernet;
164
165 err = tipc_socket_init();
166 if (err)
167 goto out_socket;
168
169 err = register_pernet_device(&tipc_topsrv_net_ops);
170 if (err)
171 goto out_pernet_topsrv;
172
173 err = register_pernet_subsys(&tipc_pernet_pre_exit_ops);
174 if (err)
175 goto out_register_pernet_subsys;
176
177 err = tipc_bearer_setup();
178 if (err)
179 goto out_bearer;
180
181 err = tipc_netlink_start();
182 if (err)
183 goto out_netlink;
184
185 err = tipc_netlink_compat_start();
186 if (err)
187 goto out_netlink_compat;
188
189 pr_info("Started in single node mode\n");
190 return 0;
191
192out_netlink_compat:
193 tipc_netlink_stop();
194out_netlink:
195 tipc_bearer_cleanup();
196out_bearer:
197 unregister_pernet_subsys(&tipc_pernet_pre_exit_ops);
198out_register_pernet_subsys:
199 unregister_pernet_device(&tipc_topsrv_net_ops);
200out_pernet_topsrv:
201 tipc_socket_stop();
202out_socket:
203 unregister_pernet_device(&tipc_net_ops);
204out_pernet:
205 tipc_unregister_sysctl();
206out_sysctl:
207 pr_err("Unable to start in single node mode\n");
208 return err;
209}
210
211static void __exit tipc_exit(void)
212{
213 tipc_netlink_compat_stop();
214 tipc_netlink_stop();
215 tipc_bearer_cleanup();
216 unregister_pernet_subsys(&tipc_pernet_pre_exit_ops);
217 unregister_pernet_device(&tipc_topsrv_net_ops);
218 tipc_socket_stop();
219 unregister_pernet_device(&tipc_net_ops);
220 tipc_unregister_sysctl();
221
222 pr_info("Deactivated\n");
223}
224
225module_init(tipc_init);
226module_exit(tipc_exit);
227
228MODULE_DESCRIPTION("TIPC: Transparent Inter Process Communication");
229MODULE_LICENSE("Dual BSD/GPL");
230MODULE_VERSION(TIPC_MOD_VER);
1/*
2 * net/tipc/core.c: TIPC module code
3 *
4 * Copyright (c) 2003-2006, Ericsson AB
5 * Copyright (c) 2005-2006, 2010-2011, 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 <linux/module.h>
38
39#include "core.h"
40#include "ref.h"
41#include "name_table.h"
42#include "subscr.h"
43#include "config.h"
44
45
46#ifndef CONFIG_TIPC_PORTS
47#define CONFIG_TIPC_PORTS 8191
48#endif
49
50#ifndef CONFIG_TIPC_LOG
51#define CONFIG_TIPC_LOG 0
52#endif
53
54/* global variables used by multiple sub-systems within TIPC */
55int tipc_random;
56
57const char tipc_alphabet[] =
58 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_.";
59
60/* configurable TIPC parameters */
61u32 tipc_own_addr;
62int tipc_max_ports;
63int tipc_max_subscriptions;
64int tipc_max_publications;
65int tipc_net_id;
66int tipc_remote_management;
67
68
69/**
70 * tipc_buf_acquire - creates a TIPC message buffer
71 * @size: message size (including TIPC header)
72 *
73 * Returns a new buffer with data pointers set to the specified size.
74 *
75 * NOTE: Headroom is reserved to allow prepending of a data link header.
76 * There may also be unrequested tailroom present at the buffer's end.
77 */
78struct sk_buff *tipc_buf_acquire(u32 size)
79{
80 struct sk_buff *skb;
81 unsigned int buf_size = (BUF_HEADROOM + size + 3) & ~3u;
82
83 skb = alloc_skb_fclone(buf_size, GFP_ATOMIC);
84 if (skb) {
85 skb_reserve(skb, BUF_HEADROOM);
86 skb_put(skb, size);
87 skb->next = NULL;
88 }
89 return skb;
90}
91
92/**
93 * tipc_core_stop_net - shut down TIPC networking sub-systems
94 */
95static void tipc_core_stop_net(void)
96{
97 tipc_net_stop();
98 tipc_eth_media_stop();
99}
100
101/**
102 * start_net - start TIPC networking sub-systems
103 */
104int tipc_core_start_net(unsigned long addr)
105{
106 int res;
107
108 res = tipc_net_start(addr);
109 if (!res)
110 res = tipc_eth_media_start();
111 if (res)
112 tipc_core_stop_net();
113 return res;
114}
115
116/**
117 * tipc_core_stop - switch TIPC from SINGLE NODE to NOT RUNNING mode
118 */
119static void tipc_core_stop(void)
120{
121 tipc_netlink_stop();
122 tipc_handler_stop();
123 tipc_cfg_stop();
124 tipc_subscr_stop();
125 tipc_nametbl_stop();
126 tipc_ref_table_stop();
127 tipc_socket_stop();
128 tipc_log_resize(0);
129}
130
131/**
132 * tipc_core_start - switch TIPC from NOT RUNNING to SINGLE NODE mode
133 */
134static int tipc_core_start(void)
135{
136 int res;
137
138 get_random_bytes(&tipc_random, sizeof(tipc_random));
139
140 res = tipc_handler_start();
141 if (!res)
142 res = tipc_ref_table_init(tipc_max_ports, tipc_random);
143 if (!res)
144 res = tipc_nametbl_init();
145 if (!res)
146 res = tipc_subscr_start();
147 if (!res)
148 res = tipc_cfg_init();
149 if (!res)
150 res = tipc_netlink_start();
151 if (!res)
152 res = tipc_socket_init();
153 if (res)
154 tipc_core_stop();
155
156 return res;
157}
158
159
160static int __init tipc_init(void)
161{
162 int res;
163
164 if (tipc_log_resize(CONFIG_TIPC_LOG) != 0)
165 warn("Unable to create log buffer\n");
166
167 info("Activated (version " TIPC_MOD_VER ")\n");
168
169 tipc_own_addr = 0;
170 tipc_remote_management = 1;
171 tipc_max_publications = 10000;
172 tipc_max_subscriptions = 2000;
173 tipc_max_ports = CONFIG_TIPC_PORTS;
174 tipc_net_id = 4711;
175
176 res = tipc_core_start();
177 if (res)
178 err("Unable to start in single node mode\n");
179 else
180 info("Started in single node mode\n");
181 return res;
182}
183
184static void __exit tipc_exit(void)
185{
186 tipc_core_stop_net();
187 tipc_core_stop();
188 info("Deactivated\n");
189}
190
191module_init(tipc_init);
192module_exit(tipc_exit);
193
194MODULE_DESCRIPTION("TIPC: Transparent Inter Process Communication");
195MODULE_LICENSE("Dual BSD/GPL");
196MODULE_VERSION(TIPC_MOD_VER);