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 "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
  75         err = tipc_bcast_init(net);
  76         if (err)
  77                 goto out_bclink;
  78
  79         return 0;
  80
  81 out_bclink:
  82         tipc_nametbl_stop(net);
  83 out_nametbl:
  84         tipc_sk_rht_destroy(net);
  85 out_sk_rht:
  86         return err;
  87 }
  88
  89 static void __net_exit tipc_exit_net(struct net *net)
  90 {
  91         tipc_net_stop(net);
  92         tipc_bcast_stop(net);
  93         tipc_nametbl_stop(net);
  94         tipc_sk_rht_destroy(net);
  95 }
  96
  97 static struct pernet_operations tipc_net_ops = {
  98         .init = tipc_init_net,
  99         .exit = tipc_exit_net,
 100         .id   = &tipc_net_id,
 101         .size = sizeof(struct tipc_net),
 102 };
 103
 104 static struct pernet_operations tipc_topsrv_net_ops = {
 105         .init = tipc_topsrv_init_net,
 106         .exit = tipc_topsrv_exit_net,
 107 };
 108
 109 static int __init tipc_init(void)
 110 {
 111         int err;
 112
 113         pr_info("Activated (version " TIPC_MOD_VER ")\n");
 114
 115         sysctl_tipc_rmem[0] = RCVBUF_MIN;
 116         sysctl_tipc_rmem[1] = RCVBUF_DEF;
 117         sysctl_tipc_rmem[2] = RCVBUF_MAX;
 118
 119         err = tipc_netlink_start();
 120         if (err)
 121                 goto out_netlink;
 122
 123         err = tipc_netlink_compat_start();
 124         if (err)
 125                 goto out_netlink_compat;
 126
 127         err = tipc_register_sysctl();
 128         if (err)
 129                 goto out_sysctl;
 130
 131         err = register_pernet_device(&tipc_net_ops);
 132         if (err)
 133                 goto out_pernet;
 134
 135         err = tipc_socket_init();
 136         if (err)
 137                 goto out_socket;
 138
 139         err = register_pernet_device(&tipc_topsrv_net_ops);
 140         if (err)
 141                 goto out_pernet_topsrv;
 142
 143         err = tipc_bearer_setup();
 144         if (err)
 145                 goto out_bearer;
 146
 147         pr_info("Started in single node mode\n");
 148         return 0;
 149 out_bearer:
 150         unregister_pernet_device(&tipc_topsrv_net_ops);
 151 out_pernet_topsrv:
 152         tipc_socket_stop();
 153 out_socket:
 154         unregister_pernet_device(&tipc_net_ops);
 155 out_pernet:
 156         tipc_unregister_sysctl();
 157 out_sysctl:
 158         tipc_netlink_compat_stop();
 159 out_netlink_compat:
 160         tipc_netlink_stop();
 161 out_netlink:
 162         pr_err("Unable to start in single node mode\n");
 163         return err;
 164 }
 165
 166 static void __exit tipc_exit(void)
 167 {
 168         tipc_bearer_cleanup();
 169         unregister_pernet_device(&tipc_topsrv_net_ops);
 170         tipc_socket_stop();
 171         unregister_pernet_device(&tipc_net_ops);
 172         tipc_netlink_stop();
 173         tipc_netlink_compat_stop();
 174         tipc_unregister_sysctl();
 175
 176         pr_info("Deactivated\n");
 177 }
 178
 179 module_init(tipc_init);
 180 module_exit(tipc_exit);
 181
 182 MODULE_DESCRIPTION("TIPC: Transparent Inter Process Communication");
 183 MODULE_LICENSE("Dual BSD/GPL");
 184 MODULE_VERSION(TIPC_MOD_VER);