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