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TOMOYO Linux Cross Reference
Linux/net/tipc/core.c

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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 #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 
 46 #include <linux/module.h>
 47 
 48 /* configurable TIPC parameters */
 49 int tipc_net_id __read_mostly;
 50 int sysctl_tipc_rmem[3] __read_mostly;  /* min/default/max */
 51 
 52 static 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->own_addr = 0;
 59         get_random_bytes(&tn->random, sizeof(int));
 60         INIT_LIST_HEAD(&tn->node_list);
 61         spin_lock_init(&tn->node_list_lock);
 62 
 63         err = tipc_sk_rht_init(net);
 64         if (err)
 65                 goto out_sk_rht;
 66 
 67         err = tipc_nametbl_init(net);
 68         if (err)
 69                 goto out_nametbl;
 70 
 71         err = tipc_topsrv_start(net);
 72         if (err)
 73                 goto out_subscr;
 74         return 0;
 75 
 76 out_subscr:
 77         tipc_nametbl_stop(net);
 78 out_nametbl:
 79         tipc_sk_rht_destroy(net);
 80 out_sk_rht:
 81         return err;
 82 }
 83 
 84 static void __net_exit tipc_exit_net(struct net *net)
 85 {
 86         tipc_topsrv_stop(net);
 87         tipc_net_stop(net);
 88         tipc_nametbl_stop(net);
 89         tipc_sk_rht_destroy(net);
 90 }
 91 
 92 static struct pernet_operations tipc_net_ops = {
 93         .init = tipc_init_net,
 94         .exit = tipc_exit_net,
 95         .id   = &tipc_net_id,
 96         .size = sizeof(struct tipc_net),
 97 };
 98 
 99 static int __init tipc_init(void)
100 {
101         int err;
102 
103         pr_info("Activated (version " TIPC_MOD_VER ")\n");
104 
105         sysctl_tipc_rmem[0] = TIPC_CONN_OVERLOAD_LIMIT >> 4 <<
106                               TIPC_LOW_IMPORTANCE;
107         sysctl_tipc_rmem[1] = TIPC_CONN_OVERLOAD_LIMIT >> 4 <<
108                               TIPC_CRITICAL_IMPORTANCE;
109         sysctl_tipc_rmem[2] = TIPC_CONN_OVERLOAD_LIMIT;
110 
111         err = tipc_netlink_start();
112         if (err)
113                 goto out_netlink;
114 
115         err = tipc_netlink_compat_start();
116         if (err)
117                 goto out_netlink_compat;
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 = register_pernet_subsys(&tipc_net_ops);
128         if (err)
129                 goto out_pernet;
130 
131         err = tipc_bearer_setup();
132         if (err)
133                 goto out_bearer;
134 
135         pr_info("Started in single node mode\n");
136         return 0;
137 out_bearer:
138         unregister_pernet_subsys(&tipc_net_ops);
139 out_pernet:
140         tipc_unregister_sysctl();
141 out_sysctl:
142         tipc_socket_stop();
143 out_socket:
144         tipc_netlink_compat_stop();
145 out_netlink_compat:
146         tipc_netlink_stop();
147 out_netlink:
148         pr_err("Unable to start in single node mode\n");
149         return err;
150 }
151 
152 static void __exit tipc_exit(void)
153 {
154         tipc_bearer_cleanup();
155         unregister_pernet_subsys(&tipc_net_ops);
156         tipc_netlink_stop();
157         tipc_netlink_compat_stop();
158         tipc_socket_stop();
159         tipc_unregister_sysctl();
160 
161         pr_info("Deactivated\n");
162 }
163 
164 module_init(tipc_init);
165 module_exit(tipc_exit);
166 
167 MODULE_DESCRIPTION("TIPC: Transparent Inter Process Communication");
168 MODULE_LICENSE("Dual BSD/GPL");
169 MODULE_VERSION(TIPC_MOD_VER);
170 

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