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