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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 #include "bcast.h"
 46 
 47 #include <linux/module.h>
 48 
 49 /* configurable TIPC parameters */
 50 unsigned int tipc_net_id __read_mostly;
 51 int sysctl_tipc_rmem[3] __read_mostly;  /* min/default/max */
 52 
 53 static 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->own_addr = 0;
 60         tn->mon_threshold = TIPC_DEF_MON_THRESHOLD;
 61         get_random_bytes(&tn->random, sizeof(int));
 62         INIT_LIST_HEAD(&tn->node_list);
 63         spin_lock_init(&tn->node_list_lock);
 64 
 65         err = tipc_sk_rht_init(net);
 66         if (err)
 67                 goto out_sk_rht;
 68 
 69         err = tipc_nametbl_init(net);
 70         if (err)
 71                 goto out_nametbl;
 72 
 73         INIT_LIST_HEAD(&tn->dist_queue);
 74         err = tipc_topsrv_start(net);
 75         if (err)
 76                 goto out_subscr;
 77 
 78         err = tipc_bcast_init(net);
 79         if (err)
 80                 goto out_bclink;
 81 
 82         return 0;
 83 
 84 out_bclink:
 85         tipc_bcast_stop(net);
 86 out_subscr:
 87         tipc_nametbl_stop(net);
 88 out_nametbl:
 89         tipc_sk_rht_destroy(net);
 90 out_sk_rht:
 91         return err;
 92 }
 93 
 94 static void __net_exit tipc_exit_net(struct net *net)
 95 {
 96         tipc_topsrv_stop(net);
 97         tipc_net_stop(net);
 98         tipc_bcast_stop(net);
 99         tipc_nametbl_stop(net);
100         tipc_sk_rht_destroy(net);
101 }
102 
103 static struct pernet_operations tipc_net_ops = {
104         .init = tipc_init_net,
105         .exit = tipc_exit_net,
106         .id   = &tipc_net_id,
107         .size = sizeof(struct tipc_net),
108 };
109 
110 static int __init tipc_init(void)
111 {
112         int err;
113 
114         pr_info("Activated (version " TIPC_MOD_VER ")\n");
115 
116         sysctl_tipc_rmem[0] = RCVBUF_MIN;
117         sysctl_tipc_rmem[1] = RCVBUF_DEF;
118         sysctl_tipc_rmem[2] = RCVBUF_MAX;
119 
120         err = tipc_netlink_start();
121         if (err)
122                 goto out_netlink;
123 
124         err = tipc_netlink_compat_start();
125         if (err)
126                 goto out_netlink_compat;
127 
128         err = tipc_socket_init();
129         if (err)
130                 goto out_socket;
131 
132         err = tipc_register_sysctl();
133         if (err)
134                 goto out_sysctl;
135 
136         err = register_pernet_subsys(&tipc_net_ops);
137         if (err)
138                 goto out_pernet;
139 
140         err = tipc_bearer_setup();
141         if (err)
142                 goto out_bearer;
143 
144         pr_info("Started in single node mode\n");
145         return 0;
146 out_bearer:
147         unregister_pernet_subsys(&tipc_net_ops);
148 out_pernet:
149         tipc_unregister_sysctl();
150 out_sysctl:
151         tipc_socket_stop();
152 out_socket:
153         tipc_netlink_compat_stop();
154 out_netlink_compat:
155         tipc_netlink_stop();
156 out_netlink:
157         pr_err("Unable to start in single node mode\n");
158         return err;
159 }
160 
161 static void __exit tipc_exit(void)
162 {
163         tipc_bearer_cleanup();
164         unregister_pernet_subsys(&tipc_net_ops);
165         tipc_netlink_stop();
166         tipc_netlink_compat_stop();
167         tipc_socket_stop();
168         tipc_unregister_sysctl();
169 
170         pr_info("Deactivated\n");
171 }
172 
173 module_init(tipc_init);
174 module_exit(tipc_exit);
175 
176 MODULE_DESCRIPTION("TIPC: Transparent Inter Process Communication");
177 MODULE_LICENSE("Dual BSD/GPL");
178 MODULE_VERSION(TIPC_MOD_VER);
179 

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