tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
38
39#include "core.h"
40#include "name_table.h"
41#include "subscr.h"
42#include "bearer.h"
43#include "net.h"
44#include "socket.h"
45#include "bcast.h"
46#include "node.h"
47
48#include <linux/module.h>
49
50/* configurable TIPC parameters */
51unsigned int tipc_net_id __read_mostly;
52int sysctl_tipc_rmem[3] __read_mostly; /* min/default/max */
53
54static int __net_init tipc_init_net(struct net *net)
55{
56 struct tipc_net *tn = net_generic(net, tipc_net_id);
57 int err;
58
59 tn->net_id = 4711;
60 tn->node_addr = 0;
61 tn->trial_addr = 0;
62 tn->addr_trial_end = 0;
63 tn->capabilities = TIPC_NODE_CAPABILITIES;
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 err = tipc_sk_rht_init(net);
72 if (err)
73 goto out_sk_rht;
74
75 err = tipc_nametbl_init(net);
76 if (err)
77 goto out_nametbl;
78
79 INIT_LIST_HEAD(&tn->dist_queue);
80 err = tipc_topsrv_start(net);
81 if (err)
82 goto out_subscr;
83
84 err = tipc_bcast_init(net);
85 if (err)
86 goto out_bclink;
87
88 return 0;
89
90out_bclink:
91 tipc_bcast_stop(net);
92out_subscr:
93 tipc_nametbl_stop(net);
94out_nametbl:
95 tipc_sk_rht_destroy(net);
96out_sk_rht:
97 return err;
98}
99
100static void __net_exit tipc_exit_net(struct net *net)
101{
102 tipc_topsrv_stop(net);
103 tipc_net_stop(net);
104 tipc_bcast_stop(net);
105 tipc_nametbl_stop(net);
106 tipc_sk_rht_destroy(net);
107}
108
109static struct pernet_operations tipc_net_ops = {
110 .init = tipc_init_net,
111 .exit = tipc_exit_net,
112 .id = &tipc_net_id,
113 .size = sizeof(struct tipc_net),
114};
115
116static int __init tipc_init(void)
117{
118 int err;
119
120 pr_info("Activated (version " TIPC_MOD_VER ")\n");
121
122 sysctl_tipc_rmem[0] = RCVBUF_MIN;
123 sysctl_tipc_rmem[1] = RCVBUF_DEF;
124 sysctl_tipc_rmem[2] = RCVBUF_MAX;
125
126 err = tipc_netlink_start();
127 if (err)
128 goto out_netlink;
129
130 err = tipc_netlink_compat_start();
131 if (err)
132 goto out_netlink_compat;
133
134 err = tipc_socket_init();
135 if (err)
136 goto out_socket;
137
138 err = tipc_register_sysctl();
139 if (err)
140 goto out_sysctl;
141
142 err = register_pernet_subsys(&tipc_net_ops);
143 if (err)
144 goto out_pernet;
145
146 err = tipc_bearer_setup();
147 if (err)
148 goto out_bearer;
149
150 pr_info("Started in single node mode\n");
151 return 0;
152out_bearer:
153 unregister_pernet_subsys(&tipc_net_ops);
154out_pernet:
155 tipc_unregister_sysctl();
156out_sysctl:
157 tipc_socket_stop();
158out_socket:
159 tipc_netlink_compat_stop();
160out_netlink_compat:
161 tipc_netlink_stop();
162out_netlink:
163 pr_err("Unable to start in single node mode\n");
164 return err;
165}
166
167static void __exit tipc_exit(void)
168{
169 tipc_bearer_cleanup();
170 unregister_pernet_subsys(&tipc_net_ops);
171 tipc_netlink_stop();
172 tipc_netlink_compat_stop();
173 tipc_socket_stop();
174 tipc_unregister_sysctl();
175
176 pr_info("Deactivated\n");
177}
178
179module_init(tipc_init);
180module_exit(tipc_exit);
181
182MODULE_DESCRIPTION("TIPC: Transparent Inter Process Communication");
183MODULE_LICENSE("Dual BSD/GPL");
184MODULE_VERSION(TIPC_MOD_VER);