net/tipc/core.c

   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 "config.h"
  43 #include "socket.h"
  44
  45 #include <linux/module.h>
  46
  47 /* global variables used by multiple sub-systems within TIPC */
  48 int tipc_random __read_mostly;
  49
  50 /* configurable TIPC parameters */
  51 u32 tipc_own_addr __read_mostly;
  52 int tipc_net_id __read_mostly;
  53 int sysctl_tipc_rmem[3] __read_mostly;  /* min/default/max */
  54
  55 static int __net_init tipc_init_net(struct net *net)
  56 {
  57         struct tipc_net *tn = net_generic(net, tipc_net_id);
  58
  59         tn->net_id = 4711;
  60
  61         return 0;
  62 }
  63
  64 static void __net_exit tipc_exit_net(struct net *net)
  65 {
  66 }
  67
  68 static struct pernet_operations tipc_net_ops = {
  69         .init = tipc_init_net,
  70         .exit = tipc_exit_net,
  71         .id   = &tipc_net_id,
  72         .size = sizeof(struct tipc_net),
  73 };
  74
  75 static int __init tipc_init(void)
  76 {
  77         int err;
  78
  79         pr_info("Activated (version " TIPC_MOD_VER ")\n");
  80
  81         tipc_own_addr = 0;
  82
  83         sysctl_tipc_rmem[0] = TIPC_CONN_OVERLOAD_LIMIT >> 4 <<
  84                               TIPC_LOW_IMPORTANCE;
  85         sysctl_tipc_rmem[1] = TIPC_CONN_OVERLOAD_LIMIT >> 4 <<
  86                               TIPC_CRITICAL_IMPORTANCE;
  87         sysctl_tipc_rmem[2] = TIPC_CONN_OVERLOAD_LIMIT;
  88
  89         get_random_bytes(&tipc_random, sizeof(tipc_random));
  90
  91         err = register_pernet_subsys(&tipc_net_ops);
  92         if (err)
  93                 goto out_pernet;
  94
  95         err = tipc_sk_rht_init();
  96         if (err)
  97                 goto out_reftbl;
  98
  99         err = tipc_nametbl_init();
 100         if (err)
 101                 goto out_nametbl;
 102
 103         err = tipc_netlink_start();
 104         if (err)
 105                 goto out_netlink;
 106
 107         err = tipc_socket_init();
 108         if (err)
 109                 goto out_socket;
 110
 111         err = tipc_register_sysctl();
 112         if (err)
 113                 goto out_sysctl;
 114
 115         err = tipc_subscr_start();
 116         if (err)
 117                 goto out_subscr;
 118
 119         err = tipc_bearer_setup();
 120         if (err)
 121                 goto out_bearer;
 122
 123         pr_info("Started in single node mode\n");
 124         return 0;
 125 out_bearer:
 126         tipc_subscr_stop();
 127 out_subscr:
 128         tipc_unregister_sysctl();
 129 out_sysctl:
 130         tipc_socket_stop();
 131 out_socket:
 132         tipc_netlink_stop();
 133 out_netlink:
 134         tipc_nametbl_stop();
 135 out_nametbl:
 136         tipc_sk_rht_destroy();
 137 out_reftbl:
 138         unregister_pernet_subsys(&tipc_net_ops);
 139 out_pernet:
 140         pr_err("Unable to start in single node mode\n");
 141         return err;
 142 }
 143
 144 static void __exit tipc_exit(void)
 145 {
 146         unregister_pernet_subsys(&tipc_net_ops);
 147         tipc_net_stop();
 148         tipc_bearer_cleanup();
 149         tipc_netlink_stop();
 150         tipc_subscr_stop();
 151         tipc_nametbl_stop();
 152         tipc_socket_stop();
 153         tipc_unregister_sysctl();
 154         tipc_sk_rht_destroy();
 155
 156         pr_info("Deactivated\n");
 157 }
 158
 159 module_init(tipc_init);
 160 module_exit(tipc_exit);
 161
 162 MODULE_DESCRIPTION("TIPC: Transparent Inter Process Communication");
 163 MODULE_LICENSE("Dual BSD/GPL");
 164 MODULE_VERSION(TIPC_MOD_VER);